v1.4.0 (#458)

Update CHANGELOG for Nebula v1.4.0

Co-authored-by: Wade Simmons <wade@wades.im>

.github/workflows/gofmt.yml

@@ -14,10 +14,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
 
-    - name: Set up Go 1.15
+    - name: Set up Go 1.16
       uses: actions/setup-go@v1
       with:
-        go-version: 1.15
+        go-version: 1.16
       id: go
 
     - name: Check out code into the Go module directory
@@ -26,9 +26,9 @@ jobs:
     - uses: actions/cache@v1
       with:
         path: ~/go/pkg/mod
-        key: ${{ runner.os }}-gofmt-${{ hashFiles('**/go.sum') }}
+        key: ${{ runner.os }}-gofmt1.16-${{ hashFiles('**/go.sum') }}
         restore-keys: |
-          ${{ runner.os }}-gofmt-
+          ${{ runner.os }}-gofmt1.16-
 
     - name: Install goimports
       run: |

.github/workflows/release.yml

@@ -10,10 +10,10 @@ jobs:
     name: Build Linux All
     runs-on: ubuntu-latest
     steps:
-      - name: Set up Go 1.15
+      - name: Set up Go 1.16
         uses: actions/setup-go@v1
         with:
-          go-version: 1.15
+          go-version: 1.16
 
       - name: Checkout code
         uses: actions/checkout@v2
@@ -34,10 +34,10 @@ jobs:
     name: Build Windows amd64
     runs-on: windows-latest
     steps:
-      - name: Set up Go 1.15
+      - name: Set up Go 1.16
         uses: actions/setup-go@v1
         with:
-          go-version: 1.15
+          go-version: 1.16
 
       - name: Checkout code
         uses: actions/checkout@v2
@@ -58,10 +58,10 @@ jobs:
     name: Build Darwin amd64
     runs-on: macOS-latest
     steps:
-      - name: Set up Go 1.15
+      - name: Set up Go 1.16
         uses: actions/setup-go@v1
         with:
-          go-version: 1.15
+          go-version: 1.16
 
       - name: Checkout code
         uses: actions/checkout@v2
@@ -69,6 +69,7 @@ jobs:
       - name: Build
         run: |
           make BUILD_NUMBER="${GITHUB_REF#refs/tags/v}" service build/nebula-darwin-amd64.tar.gz
+          make BUILD_NUMBER="${GITHUB_REF#refs/tags/v}" service build/nebula-darwin-arm64.tar.gz
           mkdir release
           mv build/*.tar.gz release
 
@@ -159,6 +160,16 @@ jobs:
           asset_name: nebula-darwin-amd64.tar.gz
           asset_content_type: application/gzip
 
+      - name: Upload darwin-arm64
+        uses: actions/upload-release-asset@v1.0.1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ steps.create_release.outputs.upload_url }}
+          asset_path: ./darwin-latest/nebula-darwin-arm64.tar.gz
+          asset_name: nebula-darwin-arm64.tar.gz
+          asset_content_type: application/gzip
+
       - name: Upload windows-amd64
         uses: actions/upload-release-asset@v1.0.1
         env:

.github/workflows/smoke.yml

@@ -18,10 +18,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
 
-    - name: Set up Go 1.15
+    - name: Set up Go 1.16
       uses: actions/setup-go@v1
       with:
-        go-version: 1.15
+        go-version: 1.16
       id: go
 
     - name: Check out code into the Go module directory
@@ -30,12 +30,12 @@ jobs:
     - uses: actions/cache@v1
       with:
         path: ~/go/pkg/mod
-        key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+        key: ${{ runner.os }}-go1.16-${{ hashFiles('**/go.sum') }}
         restore-keys: |
-          ${{ runner.os }}-go-
+          ${{ runner.os }}-go1.16-
 
     - name: build
-      run: make
+      run: make bin-docker
 
     - name: setup docker image
       working-directory: ./.github/workflows/smoke

.github/workflows/smoke/Dockerfile

@@ -1,5 +1,7 @@
 FROM debian:buster
 
-ADD ./build /
+ADD ./build /nebula
 
-ENTRYPOINT ["/nebula"]
+WORKDIR /nebula
+
+ENTRYPOINT ["/nebula/nebula"]

.github/workflows/smoke/build.sh

@@ -8,8 +8,8 @@ mkdir ./build
 (
     cd build
 
-    cp ../../../../nebula .
-    cp ../../../../nebula-cert .
+    cp ../../../../build/linux-amd64/nebula .
+    cp ../../../../build/linux-amd64/nebula-cert .
 
     HOST="lighthouse1" \
         AM_LIGHTHOUSE=true \
@@ -29,11 +29,11 @@ mkdir ./build
         OUTBOUND='[{"port": "any", "proto": "icmp", "group": "lighthouse"}]' \
         ../genconfig.sh >host4.yml
 
-    ./nebula-cert ca -name "Smoke Test"
-    ./nebula-cert sign -name "lighthouse1" -groups "lighthouse,lighthouse1" -ip "192.168.100.1/24"
-    ./nebula-cert sign -name "host2" -groups "host,host2" -ip "192.168.100.2/24"
-    ./nebula-cert sign -name "host3" -groups "host,host3" -ip "192.168.100.3/24"
-    ./nebula-cert sign -name "host4" -groups "host,host4" -ip "192.168.100.4/24"
+    ../../../../nebula-cert ca -name "Smoke Test"
+    ../../../../nebula-cert sign -name "lighthouse1" -groups "lighthouse,lighthouse1" -ip "192.168.100.1/24"
+    ../../../../nebula-cert sign -name "host2" -groups "host,host2" -ip "192.168.100.2/24"
+    ../../../../nebula-cert sign -name "host3" -groups "host,host3" -ip "192.168.100.3/24"
+    ../../../../nebula-cert sign -name "host4" -groups "host,host4" -ip "192.168.100.4/24"
 )
 
-docker build -t nebula:smoke .
+sudo docker build -t nebula:smoke .

.github/workflows/smoke/genconfig.sh

@@ -33,9 +33,9 @@ lighthouse_hosts() {
 
 cat <<EOF
 pki:
-  ca: /ca.crt
-  cert: /${HOST}.crt
-  key: /${HOST}.key
+  ca: ca.crt
+  cert: ${HOST}.crt
+  key: ${HOST}.key
 
 lighthouse:
   am_lighthouse: ${AM_LIGHTHOUSE:-false}

.github/workflows/smoke/smoke.sh

@@ -1,19 +1,33 @@
-#!/bin/sh
+#!/bin/bash
 
 set -e -x
 
-docker run --name lighthouse1 --rm nebula:smoke -config lighthouse1.yml -test
-docker run --name host2 --rm nebula:smoke -config host2.yml -test
-docker run --name host3 --rm nebula:smoke -config host3.yml -test
-docker run --name host4 --rm nebula:smoke -config host4.yml -test
+set -o pipefail
 
-docker run --name lighthouse1 --device /dev/net/tun:/dev/net/tun --cap-add NET_ADMIN --rm nebula:smoke -config lighthouse1.yml &
+mkdir -p logs
+
+cleanup() {
+    set +e
+    if [ "$(jobs -r)" ]
+    then
+        sudo docker kill lighthouse1 host2 host3 host4
+    fi
+}
+
+trap cleanup EXIT
+
+sudo docker run --name lighthouse1 --rm nebula:smoke -config lighthouse1.yml -test
+sudo docker run --name host2 --rm nebula:smoke -config host2.yml -test
+sudo docker run --name host3 --rm nebula:smoke -config host3.yml -test
+sudo docker run --name host4 --rm nebula:smoke -config host4.yml -test
+
+sudo docker run --name lighthouse1 --device /dev/net/tun:/dev/net/tun --cap-add NET_ADMIN --rm nebula:smoke -config lighthouse1.yml 2>&1 | tee logs/lighthouse1 &
 sleep 1
-docker run --name host2 --device /dev/net/tun:/dev/net/tun --cap-add NET_ADMIN --rm nebula:smoke -config host2.yml &
+sudo docker run --name host2 --device /dev/net/tun:/dev/net/tun --cap-add NET_ADMIN --rm nebula:smoke -config host2.yml 2>&1 | tee logs/host2 &
 sleep 1
-docker run --name host3 --device /dev/net/tun:/dev/net/tun --cap-add NET_ADMIN --rm nebula:smoke -config host3.yml &
+sudo docker run --name host3 --device /dev/net/tun:/dev/net/tun --cap-add NET_ADMIN --rm nebula:smoke -config host3.yml 2>&1 | tee logs/host3 &
 sleep 1
-docker run --name host4 --device /dev/net/tun:/dev/net/tun --cap-add NET_ADMIN --rm nebula:smoke -config host4.yml &
+sudo docker run --name host4 --device /dev/net/tun:/dev/net/tun --cap-add NET_ADMIN --rm nebula:smoke -config host4.yml 2>&1 | tee logs/host4 &
 sleep 1
 
 set +x
@@ -21,35 +35,35 @@ echo
 echo " *** Testing ping from lighthouse1"
 echo
 set -x
-docker exec lighthouse1 ping -c1 192.168.100.2
-docker exec lighthouse1 ping -c1 192.168.100.3
+sudo docker exec lighthouse1 ping -c1 192.168.100.2
+sudo docker exec lighthouse1 ping -c1 192.168.100.3
 
 set +x
 echo
 echo " *** Testing ping from host2"
 echo
 set -x
-docker exec host2 ping -c1 192.168.100.1
+sudo docker exec host2 ping -c1 192.168.100.1
 # Should fail because not allowed by host3 inbound firewall
-! docker exec host2 ping -c1 192.168.100.3 -w5 || exit 1
+! sudo docker exec host2 ping -c1 192.168.100.3 -w5 || exit 1
 
 set +x
 echo
 echo " *** Testing ping from host3"
 echo
 set -x
-docker exec host3 ping -c1 192.168.100.1
-docker exec host3 ping -c1 192.168.100.2
+sudo docker exec host3 ping -c1 192.168.100.1
+sudo docker exec host3 ping -c1 192.168.100.2
 
 set +x
 echo
 echo " *** Testing ping from host4"
 echo
 set -x
-docker exec host4 ping -c1 192.168.100.1
+sudo docker exec host4 ping -c1 192.168.100.1
 # Should fail because not allowed by host4 outbound firewall
-! docker exec host4 ping -c1 192.168.100.2 -w5 || exit 1
-! docker exec host4 ping -c1 192.168.100.3 -w5 || exit 1
+! sudo docker exec host4 ping -c1 192.168.100.2 -w5 || exit 1
+! sudo docker exec host4 ping -c1 192.168.100.3 -w5 || exit 1
 
 set +x
 echo
@@ -57,7 +71,13 @@ echo " *** Testing conntrack"
 echo
 set -x
 # host2 can ping host3 now that host3 pinged it first
-docker exec host2 ping -c1 192.168.100.3
+sudo docker exec host2 ping -c1 192.168.100.3
 # host4 can ping host2 once conntrack established
-docker exec host2 ping -c1 192.168.100.4
-docker exec host4 ping -c1 192.168.100.2
+sudo docker exec host2 ping -c1 192.168.100.4
+sudo docker exec host4 ping -c1 192.168.100.2
+
+sudo docker exec host4 sh -c 'kill 1'
+sudo docker exec host3 sh -c 'kill 1'
+sudo docker exec host2 sh -c 'kill 1'
+sudo docker exec lighthouse1 sh -c 'kill 1'
+sleep 1

.github/workflows/test.yml

@@ -18,10 +18,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
 
-    - name: Set up Go 1.15
+    - name: Set up Go 1.16
       uses: actions/setup-go@v1
       with:
-        go-version: 1.15
+        go-version: 1.16
       id: go
 
     - name: Check out code into the Go module directory
@@ -30,9 +30,9 @@ jobs:
     - uses: actions/cache@v1
       with:
         path: ~/go/pkg/mod
-        key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+        key: ${{ runner.os }}-go1.16-${{ hashFiles('**/go.sum') }}
         restore-keys: |
-          ${{ runner.os }}-go-
+          ${{ runner.os }}-go1.16-
 
     - name: Build
       run: make all
@@ -40,6 +40,9 @@ jobs:
     - name: Test
       run: make test
 
+    - name: End 2 end
+      run: make e2evv
+
   test:
     name: Build and test on ${{ matrix.os }}
     runs-on: ${{ matrix.os }}
@@ -48,10 +51,10 @@ jobs:
         os: [windows-latest, macOS-latest]
     steps:
 
-    - name: Set up Go 1.15
+    - name: Set up Go 1.16
       uses: actions/setup-go@v1
       with:
-        go-version: 1.15
+        go-version: 1.16
       id: go
 
     - name: Check out code into the Go module directory
@@ -60,9 +63,9 @@ jobs:
     - uses: actions/cache@v1
       with:
         path: ~/go/pkg/mod
-        key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+        key: ${{ runner.os }}-go1.16-${{ hashFiles('**/go.sum') }}
         restore-keys: |
-          ${{ runner.os }}-go-
+          ${{ runner.os }}-go1.16-
 
     - name: Build nebula
       run: go build ./cmd/nebula
@@ -72,3 +75,6 @@ jobs:
 
     - name: Test
       run: go test -v ./...
+
+    - name: End 2 end
+      run: make e2evv

CHANGELOG.md

@@ -7,10 +7,70 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [1.4.0] - 2021-05-11
+
+### Added
+
+- Ability to output qr code images in `print`, `ca`, and `sign` modes for `nebula-cert`.
+  This is useful when configuring mobile clients. (#297)
+
+- Experimental: Nebula can now do work on more than 2 cpu cores in send and receive paths via
+  the new `routines` config option. (#382, #391, #395)
+  
+- ICMP ping requests can be responded to when the `tun.disabled` is `true`.
+  This is useful so that you can "ping" a lighthouse running in this mode. (#342)
+
+- Run smoke tests via `make smoke-docker`. (#287)
+
+- More reported stats, udp memory use on linux, build version (when using Prometheus), firewall, 
+  handshake, and cached packet stats. (#390, #405, #450, #453)
+
+- IPv6 support for the underlay network. (#369)
+
+- End to end testing, run with `make e2e`. (#425, #427, #428)
+
 ### Changed
 
-- Updated the kardianos/service go library from 1.0.0 to 1.1.0, which
-  now creates launchd plist to write stdout/stderr to files by default.
+- Darwin will now log stdout/stderr to a file when using `-service` mode. (#303)
+
+- Example systemd unit file now better arranged startup order when using `sshd`
+  and other fixes. (#317, #412, #438)
+  
+- Reduced memory utilization/garbage collection. (#320, #323, #340)
+
+- Reduced CPU utilization. (#329)
+
+- Build against go 1.16. (#381)
+
+- Refactored handshakes to improve performance and correctness. (#401, #402, #404, #416, #451)
+
+- Improved roaming support for mobile clients. (#394, #457)
+
+- Lighthouse performance and correctness improvements. (#406, #418, #429, #433, #437, #442, #449)
+
+- Better ordered startup to enable `sshd`, `stats`, and `dns` subsystems to listen on
+  the nebula interface. (#375)
+
+### Fixed
+
+- No longer report handshake packets as `lost` in stats. (#331)
+
+- Error handling in the `cert` package. (#339, #373)
+
+- Orphaned pending hostmap entries are cleaned up. (#344)
+
+- Most known data races are now resolved. (#396, #400, #424)
+
+- Refuse to run a lighthouse on an ephemeral port. (#399)
+
+- Removed the global references. (#423, #426, #446)
+
+- Reloading via ssh command avoids a panic. (#447)
+
+- Shutdown is now performed in a cleaner way. (#448)
+
+- Logs will now find their way to Windows event viewer when running under `-service` mode
+  in Windows. (#443)
 
 ## [1.3.0] - 2020-09-22
 
@@ -185,7 +245,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Initial public release.
 
-[Unreleased]: https://github.com/slackhq/nebula/compare/v1.3.0...HEAD
+[Unreleased]: https://github.com/slackhq/nebula/compare/v1.4.0...HEAD
+[1.4.0]: https://github.com/slackhq/nebula/releases/tag/v1.4.0
 [1.3.0]: https://github.com/slackhq/nebula/releases/tag/v1.3.0
 [1.2.0]: https://github.com/slackhq/nebula/releases/tag/v1.2.0
 [1.1.0]: https://github.com/slackhq/nebula/releases/tag/v1.1.0

Makefile

@@ -1,8 +1,31 @@
+GOMINVERSION = 1.16
 NEBULA_CMD_PATH = "./cmd/nebula"
-BUILD_NUMBER ?= dev+$(shell date -u '+%Y%m%d%H%M%S')
 GO111MODULE = on
 export GO111MODULE
 
+# Set up OS specific bits
+ifeq ($(OS),Windows_NT)
+	#TODO: we should be able to ditch awk as well
+	GOVERSION := $(shell go version | awk "{print substr($$3, 3)}")
+	GOISMIN := $(shell IF "$(GOVERSION)" GEQ "$(GOMINVERSION)" ECHO 1)
+	NEBULA_CMD_SUFFIX = .exe
+	NULL_FILE = nul
+else
+	GOVERSION := $(shell go version | awk '{print substr($$3, 3)}')
+	GOISMIN := $(shell expr "$(GOVERSION)" ">=" "$(GOMINVERSION)")
+	NEBULA_CMD_SUFFIX =
+	NULL_FILE = /dev/null
+endif
+
+# Only defined the build number if we haven't already
+ifndef BUILD_NUMBER
+	ifeq ($(shell git describe --exact-match 2>$(NULL_FILE)),)
+		BUILD_NUMBER = $(shell git describe --abbrev=0 --match "v*" | cut -dv -f2)-$(shell git branch --show-current)-$(shell git describe --long --dirty | cut -d- -f2-)
+	else
+		BUILD_NUMBER = $(shell git describe --exact-match --dirty | cut -dv -f2)
+	endif
+endif
+
 LDFLAGS = -X main.Build=$(BUILD_NUMBER)
 
 ALL_LINUX = linux-amd64 \
@@ -20,9 +43,25 @@ ALL_LINUX = linux-amd64 \
 
 ALL = $(ALL_LINUX) \
 	darwin-amd64 \
+	darwin-arm64 \
 	freebsd-amd64 \
 	windows-amd64
 
+e2e:
+	$(TEST_ENV) go test -tags=e2e_testing -count=1 $(TEST_FLAGS) ./e2e
+
+e2ev: TEST_FLAGS = -v
+e2ev: e2e
+
+e2evv: TEST_ENV += TEST_LOGS=1
+e2evv: e2ev
+
+e2evvv: TEST_ENV += TEST_LOGS=2
+e2evvv: e2ev
+
+e2evvvv: TEST_ENV += TEST_LOGS=3
+e2evvvv: e2ev
+
 all: $(ALL:%=build/%/nebula) $(ALL:%=build/%/nebula-cert)
 
 release: $(ALL:%=build/nebula-%.tar.gz)
@@ -31,6 +70,8 @@ release-linux: $(ALL_LINUX:%=build/nebula-%.tar.gz)
 
 release-freebsd: build/nebula-freebsd-amd64.tar.gz
 
+BUILD_ARGS = -trimpath
+
 bin-windows: build/windows-amd64/nebula.exe build/windows-amd64/nebula-cert.exe
 	mv $? .
 
@@ -41,12 +82,12 @@ bin-freebsd: build/freebsd-amd64/nebula build/freebsd-amd64/nebula-cert
 	mv $? .
 
 bin:
-	go build -trimpath -ldflags "$(LDFLAGS)" -o ./nebula ${NEBULA_CMD_PATH}
-	go build -trimpath -ldflags "$(LDFLAGS)" -o ./nebula-cert ./cmd/nebula-cert
+	go build $(BUILD_ARGS) -ldflags "$(LDFLAGS)" -o ./nebula${NEBULA_CMD_SUFFIX} ${NEBULA_CMD_PATH}
+	go build $(BUILD_ARGS) -ldflags "$(LDFLAGS)" -o ./nebula-cert${NEBULA_CMD_SUFFIX} ./cmd/nebula-cert
 
 install:
-	go install -trimpath -ldflags "$(LDFLAGS)" ${NEBULA_CMD_PATH}
-	go install -trimpath -ldflags "$(LDFLAGS)" ./cmd/nebula-cert
+	go install $(BUILD_ARGS) -ldflags "$(LDFLAGS)" ${NEBULA_CMD_PATH}
+	go install $(BUILD_ARGS) -ldflags "$(LDFLAGS)" ./cmd/nebula-cert
 
 build/linux-arm-%: GOENV += GOARM=$(word 3, $(subst -, ,$*))
 build/linux-mips-%: GOENV += GOMIPS=$(word 3, $(subst -, ,$*))
@@ -57,12 +98,12 @@ build/linux-mips-softfloat/%: LDFLAGS += -s -w
 build/%/nebula: .FORCE
 	GOOS=$(firstword $(subst -, , $*)) \
 		GOARCH=$(word 2, $(subst -, ,$*)) $(GOENV) \
-		go build -trimpath -o $@ -ldflags "$(LDFLAGS)" ${NEBULA_CMD_PATH}
+		go build $(BUILD_ARGS) -o $@ -ldflags "$(LDFLAGS)" ${NEBULA_CMD_PATH}
 
 build/%/nebula-cert: .FORCE
 	GOOS=$(firstword $(subst -, , $*)) \
 		GOARCH=$(word 2, $(subst -, ,$*)) $(GOENV) \
-		go build -trimpath -o $@ -ldflags "$(LDFLAGS)" ./cmd/nebula-cert
+		go build $(BUILD_ARGS) -o $@ -ldflags "$(LDFLAGS)" ./cmd/nebula-cert
 
 build/%/nebula.exe: build/%/nebula
 	mv $< $@
@@ -100,20 +141,29 @@ bench-cpu-long:
 proto: nebula.pb.go cert/cert.pb.go
 
 nebula.pb.go: nebula.proto .FORCE
-	go build github.com/golang/protobuf/protoc-gen-go
-	PATH="$(PWD):$(PATH)" protoc --go_out=. $<
-	rm protoc-gen-go
+	go build github.com/gogo/protobuf/protoc-gen-gogofaster
+	PATH="$(CURDIR):$(PATH)" protoc --gogofaster_out=paths=source_relative:. $<
+	rm protoc-gen-gogofaster
 
 cert/cert.pb.go: cert/cert.proto .FORCE
 	$(MAKE) -C cert cert.pb.go
 
 service:
-	@echo > /dev/null
+	@echo > $(NULL_FILE)
 	$(eval NEBULA_CMD_PATH := "./cmd/nebula-service")
 ifeq ($(words $(MAKECMDGOALS)),1)
-	$(MAKE) service ${.DEFAULT_GOAL} --no-print-directory
+	@$(MAKE) service ${.DEFAULT_GOAL} --no-print-directory
 endif
 
+bin-docker: bin build/linux-amd64/nebula build/linux-amd64/nebula-cert
+
+smoke-docker: bin-docker
+	cd .github/workflows/smoke/ && ./build.sh
+	cd .github/workflows/smoke/ && ./smoke.sh
+
+smoke-docker-race: BUILD_ARGS = -race
+smoke-docker-race: smoke-docker
+
 .FORCE:
-.PHONY: test test-cov-html bench bench-cpu bench-cpu-long bin proto release service
+.PHONY: e2e e2ev e2evv e2evvv e2evvvv test test-cov-html bench bench-cpu bench-cpu-long bin proto release service smoke-docker smoke-docker-race
 .DEFAULT_GOAL := bin

README.md

@@ -1,7 +1,6 @@
 ## What is Nebula?
 Nebula is a scalable overlay networking tool with a focus on performance, simplicity and security.
-It lets you seamlessly connect computers anywhere in the world. Nebula is portable, and runs on Linux, OSX, and Windows.
-(Also: keep this quiet, but we have an early prototype running on iOS).
+It lets you seamlessly connect computers anywhere in the world. Nebula is portable, and runs on Linux, OSX, Windows, iOS, and Android.
 It can be used to connect a small number of computers, but is also able to connect tens of thousands of computers.
 
 Nebula incorporates a number of existing concepts like encryption, security groups, certificates,
@@ -13,6 +12,22 @@ You can read more about Nebula [here](https://medium.com/p/884110a5579).
 
 You can also join the NebulaOSS Slack group [here](https://join.slack.com/t/nebulaoss/shared_invite/enQtOTA5MDI4NDg3MTg4LTkwY2EwNTI4NzQyMzc0M2ZlODBjNWI3NTY1MzhiOThiMmZlZjVkMTI0NGY4YTMyNjUwMWEyNzNkZTJmYzQxOGU)
 
+## Supported Platforms
+
+#### Desktop and Server
+
+Check the [releases](https://github.com/slackhq/nebula/releases/latest) page for downloads
+
+- Linux - 64 and 32 bit, arm, and others 
+- Windows
+- MacOS
+- Freebsd
+
+#### Mobile
+
+- [iOS](https://apps.apple.com/us/app/mobile-nebula/id1509587936?itsct=apps_box&itscg=30200)
+- [Android](https://play.google.com/store/apps/details?id=net.defined.mobile_nebula&pcampaignid=pcampaignidMKT-Other-global-all-co-prtnr-py-PartBadge-Mar2515-1)
+
 ## Technical Overview
 
 Nebula is a mutually authenticated peer-to-peer software defined network based on the [Noise Protocol Framework](https://noiseprotocol.org/).

allow_list.go

@@ -2,12 +2,13 @@ package nebula
 
 import (
 	"fmt"
+	"net"
 	"regexp"
 )
 
 type AllowList struct {
 	// The values of this cidrTree are `bool`, signifying allow/deny
-	cidrTree *CIDRTree
+	cidrTree *CIDR6Tree
 
 	// To avoid ambiguity, all rules must be true, or all rules must be false.
 	nameRules []AllowListNameRule
@@ -18,7 +19,7 @@ type AllowListNameRule struct {
 	Allow bool
 }
 
-func (al *AllowList) Allow(ip uint32) bool {
+func (al *AllowList) Allow(ip net.IP) bool {
 	if al == nil {
 		return true
 	}
@@ -32,6 +33,34 @@ func (al *AllowList) Allow(ip uint32) bool {
 	}
 }
 
+func (al *AllowList) AllowIpV4(ip uint32) bool {
+	if al == nil {
+		return true
+	}
+
+	result := al.cidrTree.MostSpecificContainsIpV4(ip)
+	switch v := result.(type) {
+	case bool:
+		return v
+	default:
+		panic(fmt.Errorf("invalid state, allowlist returned: %T %v", result, result))
+	}
+}
+
+func (al *AllowList) AllowIpV6(hi, lo uint64) bool {
+	if al == nil {
+		return true
+	}
+
+	result := al.cidrTree.MostSpecificContainsIpV6(hi, lo)
+	switch v := result.(type) {
+	case bool:
+		return v
+	default:
+		panic(fmt.Errorf("invalid state, allowlist returned: %T %v", result, result))
+	}
+}
+
 func (al *AllowList) AllowName(name string) bool {
 	if al == nil || len(al.nameRules) == 0 {
 		return true

allow_list_test.go

@@ -9,17 +9,26 @@ import (
 )
 
 func TestAllowList_Allow(t *testing.T) {
-	assert.Equal(t, true, ((*AllowList)(nil)).Allow(ip2int(net.ParseIP("1.1.1.1"))))
+	assert.Equal(t, true, ((*AllowList)(nil)).Allow(net.ParseIP("1.1.1.1")))
 
-	tree := NewCIDRTree()
+	tree := NewCIDR6Tree()
 	tree.AddCIDR(getCIDR("0.0.0.0/0"), true)
 	tree.AddCIDR(getCIDR("10.0.0.0/8"), false)
+	tree.AddCIDR(getCIDR("10.42.42.42/32"), true)
+	tree.AddCIDR(getCIDR("10.42.0.0/16"), true)
 	tree.AddCIDR(getCIDR("10.42.42.0/24"), true)
+	tree.AddCIDR(getCIDR("10.42.42.0/24"), false)
+	tree.AddCIDR(getCIDR("::1/128"), true)
+	tree.AddCIDR(getCIDR("::2/128"), false)
 	al := &AllowList{cidrTree: tree}
 
-	assert.Equal(t, true, al.Allow(ip2int(net.ParseIP("1.1.1.1"))))
-	assert.Equal(t, false, al.Allow(ip2int(net.ParseIP("10.0.0.4"))))
-	assert.Equal(t, true, al.Allow(ip2int(net.ParseIP("10.42.42.42"))))
+	assert.Equal(t, true, al.Allow(net.ParseIP("1.1.1.1")))
+	assert.Equal(t, false, al.Allow(net.ParseIP("10.0.0.4")))
+	assert.Equal(t, true, al.Allow(net.ParseIP("10.42.42.42")))
+	assert.Equal(t, false, al.Allow(net.ParseIP("10.42.42.41")))
+	assert.Equal(t, true, al.Allow(net.ParseIP("10.42.0.1")))
+	assert.Equal(t, true, al.Allow(net.ParseIP("::1")))
+	assert.Equal(t, false, al.Allow(net.ParseIP("::2")))
 }
 
 func TestAllowList_AllowName(t *testing.T) {

bits.go

@@ -26,7 +26,7 @@ func NewBits(bits uint64) *Bits {
 	}
 }
 
-func (b *Bits) Check(i uint64) bool {
+func (b *Bits) Check(l logrus.FieldLogger, i uint64) bool {
 	// If i is the next number, return true.
 	if i > b.current || (i == 0 && b.firstSeen == false && b.current < b.length) {
 		return true
@@ -47,7 +47,7 @@ func (b *Bits) Check(i uint64) bool {
 	return false
 }
 
-func (b *Bits) Update(i uint64) bool {
+func (b *Bits) Update(l *logrus.Logger, i uint64) bool {
 	// If i is the next number, return true and update current.
 	if i == b.current+1 {
 		// Report missed packets, we can only understand what was missed after the first window has been gone through

bits_test.go

@@ -7,6 +7,7 @@ import (
 )
 
 func TestBits(t *testing.T) {
+	l := NewTestLogger()
 	b := NewBits(10)
 
 	// make sure it is the right size
@@ -14,46 +15,46 @@ func TestBits(t *testing.T) {
 
 	// This is initialized to zero - receive one. This should work.
 
-	assert.True(t, b.Check(1))
-	u := b.Update(1)
+	assert.True(t, b.Check(l, 1))
+	u := b.Update(l, 1)
 	assert.True(t, u)
 	assert.EqualValues(t, 1, b.current)
 	g := []bool{false, true, false, false, false, false, false, false, false, false}
 	assert.Equal(t, g, b.bits)
 
 	// Receive two
-	assert.True(t, b.Check(2))
-	u = b.Update(2)
+	assert.True(t, b.Check(l, 2))
+	u = b.Update(l, 2)
 	assert.True(t, u)
 	assert.EqualValues(t, 2, b.current)
 	g = []bool{false, true, true, false, false, false, false, false, false, false}
 	assert.Equal(t, g, b.bits)
 
 	// Receive two again - it will fail
-	assert.False(t, b.Check(2))
-	u = b.Update(2)
+	assert.False(t, b.Check(l, 2))
+	u = b.Update(l, 2)
 	assert.False(t, u)
 	assert.EqualValues(t, 2, b.current)
 
 	// Jump ahead to 15, which should clear everything and set the 6th element
-	assert.True(t, b.Check(15))
-	u = b.Update(15)
+	assert.True(t, b.Check(l, 15))
+	u = b.Update(l, 15)
 	assert.True(t, u)
 	assert.EqualValues(t, 15, b.current)
 	g = []bool{false, false, false, false, false, true, false, false, false, false}
 	assert.Equal(t, g, b.bits)
 
 	// Mark 14, which is allowed because it is in the window
-	assert.True(t, b.Check(14))
-	u = b.Update(14)
+	assert.True(t, b.Check(l, 14))
+	u = b.Update(l, 14)
 	assert.True(t, u)
 	assert.EqualValues(t, 15, b.current)
 	g = []bool{false, false, false, false, true, true, false, false, false, false}
 	assert.Equal(t, g, b.bits)
 
 	// Mark 5, which is not allowed because it is not in the window
-	assert.False(t, b.Check(5))
-	u = b.Update(5)
+	assert.False(t, b.Check(l, 5))
+	u = b.Update(l, 5)
 	assert.False(t, u)
 	assert.EqualValues(t, 15, b.current)
 	g = []bool{false, false, false, false, true, true, false, false, false, false}
@@ -61,63 +62,65 @@ func TestBits(t *testing.T) {
 
 	// make sure we handle wrapping around once to the current position
 	b = NewBits(10)
-	assert.True(t, b.Update(1))
-	assert.True(t, b.Update(11))
+	assert.True(t, b.Update(l, 1))
+	assert.True(t, b.Update(l, 11))
 	assert.Equal(t, []bool{false, true, false, false, false, false, false, false, false, false}, b.bits)
 
 	// Walk through a few windows in order
 	b = NewBits(10)
 	for i := uint64(0); i <= 100; i++ {
-		assert.True(t, b.Check(i), "Error while checking %v", i)
-		assert.True(t, b.Update(i), "Error while updating %v", i)
+		assert.True(t, b.Check(l, i), "Error while checking %v", i)
+		assert.True(t, b.Update(l, i), "Error while updating %v", i)
 	}
 }
 
 func TestBitsDupeCounter(t *testing.T) {
+	l := NewTestLogger()
 	b := NewBits(10)
 	b.lostCounter.Clear()
 	b.dupeCounter.Clear()
 	b.outOfWindowCounter.Clear()
 
-	assert.True(t, b.Update(1))
+	assert.True(t, b.Update(l, 1))
 	assert.Equal(t, int64(0), b.dupeCounter.Count())
 
-	assert.False(t, b.Update(1))
+	assert.False(t, b.Update(l, 1))
 	assert.Equal(t, int64(1), b.dupeCounter.Count())
 
-	assert.True(t, b.Update(2))
+	assert.True(t, b.Update(l, 2))
 	assert.Equal(t, int64(1), b.dupeCounter.Count())
 
-	assert.True(t, b.Update(3))
+	assert.True(t, b.Update(l, 3))
 	assert.Equal(t, int64(1), b.dupeCounter.Count())
 
-	assert.False(t, b.Update(1))
+	assert.False(t, b.Update(l, 1))
 	assert.Equal(t, int64(0), b.lostCounter.Count())
 	assert.Equal(t, int64(2), b.dupeCounter.Count())
 	assert.Equal(t, int64(0), b.outOfWindowCounter.Count())
 }
 
 func TestBitsOutOfWindowCounter(t *testing.T) {
+	l := NewTestLogger()
 	b := NewBits(10)
 	b.lostCounter.Clear()
 	b.dupeCounter.Clear()
 	b.outOfWindowCounter.Clear()
 
-	assert.True(t, b.Update(20))
+	assert.True(t, b.Update(l, 20))
 	assert.Equal(t, int64(0), b.outOfWindowCounter.Count())
 
-	assert.True(t, b.Update(21))
-	assert.True(t, b.Update(22))
-	assert.True(t, b.Update(23))
-	assert.True(t, b.Update(24))
-	assert.True(t, b.Update(25))
-	assert.True(t, b.Update(26))
-	assert.True(t, b.Update(27))
-	assert.True(t, b.Update(28))
-	assert.True(t, b.Update(29))
+	assert.True(t, b.Update(l, 21))
+	assert.True(t, b.Update(l, 22))
+	assert.True(t, b.Update(l, 23))
+	assert.True(t, b.Update(l, 24))
+	assert.True(t, b.Update(l, 25))
+	assert.True(t, b.Update(l, 26))
+	assert.True(t, b.Update(l, 27))
+	assert.True(t, b.Update(l, 28))
+	assert.True(t, b.Update(l, 29))
 	assert.Equal(t, int64(0), b.outOfWindowCounter.Count())
 
-	assert.False(t, b.Update(0))
+	assert.False(t, b.Update(l, 0))
 	assert.Equal(t, int64(1), b.outOfWindowCounter.Count())
 
 	//tODO: make sure lostcounter doesn't increase in orderly increment
@@ -127,23 +130,24 @@ func TestBitsOutOfWindowCounter(t *testing.T) {
 }
 
 func TestBitsLostCounter(t *testing.T) {
+	l := NewTestLogger()
 	b := NewBits(10)
 	b.lostCounter.Clear()
 	b.dupeCounter.Clear()
 	b.outOfWindowCounter.Clear()
 
 	//assert.True(t, b.Update(0))
-	assert.True(t, b.Update(0))
-	assert.True(t, b.Update(20))
-	assert.True(t, b.Update(21))
-	assert.True(t, b.Update(22))
-	assert.True(t, b.Update(23))
-	assert.True(t, b.Update(24))
-	assert.True(t, b.Update(25))
-	assert.True(t, b.Update(26))
-	assert.True(t, b.Update(27))
-	assert.True(t, b.Update(28))
-	assert.True(t, b.Update(29))
+	assert.True(t, b.Update(l, 0))
+	assert.True(t, b.Update(l, 20))
+	assert.True(t, b.Update(l, 21))
+	assert.True(t, b.Update(l, 22))
+	assert.True(t, b.Update(l, 23))
+	assert.True(t, b.Update(l, 24))
+	assert.True(t, b.Update(l, 25))
+	assert.True(t, b.Update(l, 26))
+	assert.True(t, b.Update(l, 27))
+	assert.True(t, b.Update(l, 28))
+	assert.True(t, b.Update(l, 29))
 	assert.Equal(t, int64(20), b.lostCounter.Count())
 	assert.Equal(t, int64(0), b.dupeCounter.Count())
 	assert.Equal(t, int64(0), b.outOfWindowCounter.Count())
@@ -153,56 +157,56 @@ func TestBitsLostCounter(t *testing.T) {
 	b.dupeCounter.Clear()
 	b.outOfWindowCounter.Clear()
 
-	assert.True(t, b.Update(0))
+	assert.True(t, b.Update(l, 0))
 	assert.Equal(t, int64(0), b.lostCounter.Count())
-	assert.True(t, b.Update(9))
+	assert.True(t, b.Update(l, 9))
 	assert.Equal(t, int64(0), b.lostCounter.Count())
 	// 10 will set 0 index, 0 was already set, no lost packets
-	assert.True(t, b.Update(10))
+	assert.True(t, b.Update(l, 10))
 	assert.Equal(t, int64(0), b.lostCounter.Count())
 	// 11 will set 1 index, 1 was missed, we should see 1 packet lost
-	assert.True(t, b.Update(11))
+	assert.True(t, b.Update(l, 11))
 	assert.Equal(t, int64(1), b.lostCounter.Count())
 	// Now let's fill in the window, should end up with 8 lost packets
-	assert.True(t, b.Update(12))
-	assert.True(t, b.Update(13))
-	assert.True(t, b.Update(14))
-	assert.True(t, b.Update(15))
-	assert.True(t, b.Update(16))
-	assert.True(t, b.Update(17))
-	assert.True(t, b.Update(18))
-	assert.True(t, b.Update(19))
+	assert.True(t, b.Update(l, 12))
+	assert.True(t, b.Update(l, 13))
+	assert.True(t, b.Update(l, 14))
+	assert.True(t, b.Update(l, 15))
+	assert.True(t, b.Update(l, 16))
+	assert.True(t, b.Update(l, 17))
+	assert.True(t, b.Update(l, 18))
+	assert.True(t, b.Update(l, 19))
 	assert.Equal(t, int64(8), b.lostCounter.Count())
 
 	// Jump ahead by a window size
-	assert.True(t, b.Update(29))
+	assert.True(t, b.Update(l, 29))
 	assert.Equal(t, int64(8), b.lostCounter.Count())
 	// Now lets walk ahead normally through the window, the missed packets should fill in
-	assert.True(t, b.Update(30))
-	assert.True(t, b.Update(31))
-	assert.True(t, b.Update(32))
-	assert.True(t, b.Update(33))
-	assert.True(t, b.Update(34))
-	assert.True(t, b.Update(35))
-	assert.True(t, b.Update(36))
-	assert.True(t, b.Update(37))
-	assert.True(t, b.Update(38))
+	assert.True(t, b.Update(l, 30))
+	assert.True(t, b.Update(l, 31))
+	assert.True(t, b.Update(l, 32))
+	assert.True(t, b.Update(l, 33))
+	assert.True(t, b.Update(l, 34))
+	assert.True(t, b.Update(l, 35))
+	assert.True(t, b.Update(l, 36))
+	assert.True(t, b.Update(l, 37))
+	assert.True(t, b.Update(l, 38))
 	// 39 packets tracked, 22 seen, 17 lost
 	assert.Equal(t, int64(17), b.lostCounter.Count())
 
 	// Jump ahead by 2 windows, should have recording 1 full window missing
-	assert.True(t, b.Update(58))
+	assert.True(t, b.Update(l, 58))
 	assert.Equal(t, int64(27), b.lostCounter.Count())
 	// Now lets walk ahead normally through the window, the missed packets should fill in from this window
-	assert.True(t, b.Update(59))
-	assert.True(t, b.Update(60))
-	assert.True(t, b.Update(61))
-	assert.True(t, b.Update(62))
-	assert.True(t, b.Update(63))
-	assert.True(t, b.Update(64))
-	assert.True(t, b.Update(65))
-	assert.True(t, b.Update(66))
-	assert.True(t, b.Update(67))
+	assert.True(t, b.Update(l, 59))
+	assert.True(t, b.Update(l, 60))
+	assert.True(t, b.Update(l, 61))
+	assert.True(t, b.Update(l, 62))
+	assert.True(t, b.Update(l, 63))
+	assert.True(t, b.Update(l, 64))
+	assert.True(t, b.Update(l, 65))
+	assert.True(t, b.Update(l, 66))
+	assert.True(t, b.Update(l, 67))
 	// 68 packets tracked, 32 seen, 36 missed
 	assert.Equal(t, int64(36), b.lostCounter.Count())
 	assert.Equal(t, int64(0), b.dupeCounter.Count())

cert.go

@@ -7,11 +7,10 @@ import (
 	"strings"
 	"time"
 
+	"github.com/sirupsen/logrus"
 	"github.com/slackhq/nebula/cert"
 )
 
-var trustedCAs *cert.NebulaCAPool
-
 type CertState struct {
 	certificate         *cert.NebulaCertificate
 	rawCertificate      []byte
@@ -119,7 +118,7 @@ func NewCertStateFromConfig(c *Config) (*CertState, error) {
 	return NewCertState(nebulaCert, rawKey)
 }
 
-func loadCAFromConfig(c *Config) (*cert.NebulaCAPool, error) {
+func loadCAFromConfig(l *logrus.Logger, c *Config) (*cert.NebulaCAPool, error) {
 	var rawCA []byte
 	var err error
 

cert/Makefile

@@ -2,8 +2,8 @@ GO111MODULE = on
 export GO111MODULE
 
 cert.pb.go: cert.proto .FORCE
-	go build github.com/golang/protobuf/protoc-gen-go
-	PATH="$(PWD):$(PATH)" protoc --go_out=. $<
+	go build google.golang.org/protobuf/cmd/protoc-gen-go
+	PATH="$(CURDIR):$(PATH)" protoc --go_out=. --go_opt=paths=source_relative $<
 	rm protoc-gen-go
 
 .FORCE:

cert/cert.go

@@ -61,6 +61,10 @@ func UnmarshalNebulaCertificate(b []byte) (*NebulaCertificate, error) {
 		return nil, err
 	}
 
+	if rc.Details == nil {
+		return nil, fmt.Errorf("encoded Details was nil")
+	}
+
 	if len(rc.Details.Ips)%2 != 0 {
 		return nil, fmt.Errorf("encoded IPs should be in pairs, an odd number was found")
 	}
@@ -123,6 +127,9 @@ func UnmarshalNebulaCertificateFromPEM(b []byte) (*NebulaCertificate, []byte, er
 	if p == nil {
 		return nil, r, fmt.Errorf("input did not contain a valid PEM encoded block")
 	}
+	if p.Type != CertBanner {
+		return nil, r, fmt.Errorf("bytes did not contain a proper nebula certificate banner")
+	}
 	nc, err := UnmarshalNebulaCertificate(p.Bytes)
 	return nc, r, err
 }

cert/cert.pb.go

@@ -1,202 +1,298 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.26.0
+// 	protoc        v3.14.0
 // source: cert.proto
 
 package cert
 
 import (
-	fmt "fmt"
-	proto "github.com/golang/protobuf/proto"
-	math "math"
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
 )
 
-// Reference imports to suppress errors if they are not otherwise used.
-var _ = proto.Marshal
-var _ = fmt.Errorf
-var _ = math.Inf
-
-// This is a compile-time assertion to ensure that this generated file
-// is compatible with the proto package it is being compiled against.
-// A compilation error at this line likely means your copy of the
-// proto package needs to be updated.
-const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
 
 type RawNebulaCertificate struct {
-	Details              *RawNebulaCertificateDetails `protobuf:"bytes,1,opt,name=Details,json=details,proto3" json:"Details,omitempty"`
-	Signature            []byte                       `protobuf:"bytes,2,opt,name=Signature,json=signature,proto3" json:"Signature,omitempty"`
-	XXX_NoUnkeyedLiteral struct{}                     `json:"-"`
-	XXX_unrecognized     []byte                       `json:"-"`
-	XXX_sizecache        int32                        `json:"-"`
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Details   *RawNebulaCertificateDetails `protobuf:"bytes,1,opt,name=Details,proto3" json:"Details,omitempty"`
+	Signature []byte                       `protobuf:"bytes,2,opt,name=Signature,proto3" json:"Signature,omitempty"`
 }
 
-func (m *RawNebulaCertificate) Reset()         { *m = RawNebulaCertificate{} }
-func (m *RawNebulaCertificate) String() string { return proto.CompactTextString(m) }
-func (*RawNebulaCertificate) ProtoMessage()    {}
+func (x *RawNebulaCertificate) Reset() {
+	*x = RawNebulaCertificate{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_cert_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *RawNebulaCertificate) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*RawNebulaCertificate) ProtoMessage() {}
+
+func (x *RawNebulaCertificate) ProtoReflect() protoreflect.Message {
+	mi := &file_cert_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use RawNebulaCertificate.ProtoReflect.Descriptor instead.
 func (*RawNebulaCertificate) Descriptor() ([]byte, []int) {
-	return fileDescriptor_a142e29cbef9b1cf, []int{0}
+	return file_cert_proto_rawDescGZIP(), []int{0}
 }
 
-func (m *RawNebulaCertificate) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_RawNebulaCertificate.Unmarshal(m, b)
-}
-func (m *RawNebulaCertificate) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_RawNebulaCertificate.Marshal(b, m, deterministic)
-}
-func (m *RawNebulaCertificate) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_RawNebulaCertificate.Merge(m, src)
-}
-func (m *RawNebulaCertificate) XXX_Size() int {
-	return xxx_messageInfo_RawNebulaCertificate.Size(m)
-}
-func (m *RawNebulaCertificate) XXX_DiscardUnknown() {
-	xxx_messageInfo_RawNebulaCertificate.DiscardUnknown(m)
-}
-
-var xxx_messageInfo_RawNebulaCertificate proto.InternalMessageInfo
-
-func (m *RawNebulaCertificate) GetDetails() *RawNebulaCertificateDetails {
-	if m != nil {
-		return m.Details
+func (x *RawNebulaCertificate) GetDetails() *RawNebulaCertificateDetails {
+	if x != nil {
+		return x.Details
 	}
 	return nil
 }
 
-func (m *RawNebulaCertificate) GetSignature() []byte {
-	if m != nil {
-		return m.Signature
+func (x *RawNebulaCertificate) GetSignature() []byte {
+	if x != nil {
+		return x.Signature
 	}
 	return nil
 }
 
 type RawNebulaCertificateDetails struct {
-	Name string `protobuf:"bytes,1,opt,name=Name,json=name,proto3" json:"Name,omitempty"`
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Name string `protobuf:"bytes,1,opt,name=Name,proto3" json:"Name,omitempty"`
 	// Ips and Subnets are in big endian 32 bit pairs, 1st the ip, 2nd the mask
-	Ips       []uint32 `protobuf:"varint,2,rep,packed,name=Ips,json=ips,proto3" json:"Ips,omitempty"`
-	Subnets   []uint32 `protobuf:"varint,3,rep,packed,name=Subnets,json=subnets,proto3" json:"Subnets,omitempty"`
-	Groups    []string `protobuf:"bytes,4,rep,name=Groups,json=groups,proto3" json:"Groups,omitempty"`
-	NotBefore int64    `protobuf:"varint,5,opt,name=NotBefore,json=notBefore,proto3" json:"NotBefore,omitempty"`
-	NotAfter  int64    `protobuf:"varint,6,opt,name=NotAfter,json=notAfter,proto3" json:"NotAfter,omitempty"`
-	PublicKey []byte   `protobuf:"bytes,7,opt,name=PublicKey,json=publicKey,proto3" json:"PublicKey,omitempty"`
-	IsCA      bool     `protobuf:"varint,8,opt,name=IsCA,json=isCA,proto3" json:"IsCA,omitempty"`
+	Ips       []uint32 `protobuf:"varint,2,rep,packed,name=Ips,proto3" json:"Ips,omitempty"`
+	Subnets   []uint32 `protobuf:"varint,3,rep,packed,name=Subnets,proto3" json:"Subnets,omitempty"`
+	Groups    []string `protobuf:"bytes,4,rep,name=Groups,proto3" json:"Groups,omitempty"`
+	NotBefore int64    `protobuf:"varint,5,opt,name=NotBefore,proto3" json:"NotBefore,omitempty"`
+	NotAfter  int64    `protobuf:"varint,6,opt,name=NotAfter,proto3" json:"NotAfter,omitempty"`
+	PublicKey []byte   `protobuf:"bytes,7,opt,name=PublicKey,proto3" json:"PublicKey,omitempty"`
+	IsCA      bool     `protobuf:"varint,8,opt,name=IsCA,proto3" json:"IsCA,omitempty"`
 	// sha-256 of the issuer certificate, if this field is blank the cert is self-signed
-	Issuer               []byte   `protobuf:"bytes,9,opt,name=Issuer,json=issuer,proto3" json:"Issuer,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
+	Issuer []byte `protobuf:"bytes,9,opt,name=Issuer,proto3" json:"Issuer,omitempty"`
 }
 
-func (m *RawNebulaCertificateDetails) Reset()         { *m = RawNebulaCertificateDetails{} }
-func (m *RawNebulaCertificateDetails) String() string { return proto.CompactTextString(m) }
-func (*RawNebulaCertificateDetails) ProtoMessage()    {}
+func (x *RawNebulaCertificateDetails) Reset() {
+	*x = RawNebulaCertificateDetails{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_cert_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *RawNebulaCertificateDetails) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*RawNebulaCertificateDetails) ProtoMessage() {}
+
+func (x *RawNebulaCertificateDetails) ProtoReflect() protoreflect.Message {
+	mi := &file_cert_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use RawNebulaCertificateDetails.ProtoReflect.Descriptor instead.
 func (*RawNebulaCertificateDetails) Descriptor() ([]byte, []int) {
-	return fileDescriptor_a142e29cbef9b1cf, []int{1}
+	return file_cert_proto_rawDescGZIP(), []int{1}
 }
 
-func (m *RawNebulaCertificateDetails) XXX_Unmarshal(b []byte) error {
-	return xxx_messageInfo_RawNebulaCertificateDetails.Unmarshal(m, b)
-}
-func (m *RawNebulaCertificateDetails) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
-	return xxx_messageInfo_RawNebulaCertificateDetails.Marshal(b, m, deterministic)
-}
-func (m *RawNebulaCertificateDetails) XXX_Merge(src proto.Message) {
-	xxx_messageInfo_RawNebulaCertificateDetails.Merge(m, src)
-}
-func (m *RawNebulaCertificateDetails) XXX_Size() int {
-	return xxx_messageInfo_RawNebulaCertificateDetails.Size(m)
-}
-func (m *RawNebulaCertificateDetails) XXX_DiscardUnknown() {
-	xxx_messageInfo_RawNebulaCertificateDetails.DiscardUnknown(m)
-}
-
-var xxx_messageInfo_RawNebulaCertificateDetails proto.InternalMessageInfo
-
-func (m *RawNebulaCertificateDetails) GetName() string {
-	if m != nil {
-		return m.Name
+func (x *RawNebulaCertificateDetails) GetName() string {
+	if x != nil {
+		return x.Name
 	}
 	return ""
 }
 
-func (m *RawNebulaCertificateDetails) GetIps() []uint32 {
-	if m != nil {
-		return m.Ips
+func (x *RawNebulaCertificateDetails) GetIps() []uint32 {
+	if x != nil {
+		return x.Ips
 	}
 	return nil
 }
 
-func (m *RawNebulaCertificateDetails) GetSubnets() []uint32 {
-	if m != nil {
-		return m.Subnets
+func (x *RawNebulaCertificateDetails) GetSubnets() []uint32 {
+	if x != nil {
+		return x.Subnets
 	}
 	return nil
 }
 
-func (m *RawNebulaCertificateDetails) GetGroups() []string {
-	if m != nil {
-		return m.Groups
+func (x *RawNebulaCertificateDetails) GetGroups() []string {
+	if x != nil {
+		return x.Groups
 	}
 	return nil
 }
 
-func (m *RawNebulaCertificateDetails) GetNotBefore() int64 {
-	if m != nil {
-		return m.NotBefore
+func (x *RawNebulaCertificateDetails) GetNotBefore() int64 {
+	if x != nil {
+		return x.NotBefore
 	}
 	return 0
 }
 
-func (m *RawNebulaCertificateDetails) GetNotAfter() int64 {
-	if m != nil {
-		return m.NotAfter
+func (x *RawNebulaCertificateDetails) GetNotAfter() int64 {
+	if x != nil {
+		return x.NotAfter
 	}
 	return 0
 }
 
-func (m *RawNebulaCertificateDetails) GetPublicKey() []byte {
-	if m != nil {
-		return m.PublicKey
+func (x *RawNebulaCertificateDetails) GetPublicKey() []byte {
+	if x != nil {
+		return x.PublicKey
 	}
 	return nil
 }
 
-func (m *RawNebulaCertificateDetails) GetIsCA() bool {
-	if m != nil {
-		return m.IsCA
+func (x *RawNebulaCertificateDetails) GetIsCA() bool {
+	if x != nil {
+		return x.IsCA
 	}
 	return false
 }
 
-func (m *RawNebulaCertificateDetails) GetIssuer() []byte {
-	if m != nil {
-		return m.Issuer
+func (x *RawNebulaCertificateDetails) GetIssuer() []byte {
+	if x != nil {
+		return x.Issuer
 	}
 	return nil
 }
 
-func init() {
-	proto.RegisterType((*RawNebulaCertificate)(nil), "cert.RawNebulaCertificate")
-	proto.RegisterType((*RawNebulaCertificateDetails)(nil), "cert.RawNebulaCertificateDetails")
+var File_cert_proto protoreflect.FileDescriptor
+
+var file_cert_proto_rawDesc = []byte{
+	0x0a, 0x0a, 0x63, 0x65, 0x72, 0x74, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x04, 0x63, 0x65,
+	0x72, 0x74, 0x22, 0x71, 0x0a, 0x14, 0x52, 0x61, 0x77, 0x4e, 0x65, 0x62, 0x75, 0x6c, 0x61, 0x43,
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+	0x09, 0x4e, 0x6f, 0x74, 0x42, 0x65, 0x66, 0x6f, 0x72, 0x65, 0x18, 0x05, 0x20, 0x01, 0x28, 0x03,
+	0x52, 0x09, 0x4e, 0x6f, 0x74, 0x42, 0x65, 0x66, 0x6f, 0x72, 0x65, 0x12, 0x1a, 0x0a, 0x08, 0x4e,
+	0x6f, 0x74, 0x41, 0x66, 0x74, 0x65, 0x72, 0x18, 0x06, 0x20, 0x01, 0x28, 0x03, 0x52, 0x08, 0x4e,
+	0x6f, 0x74, 0x41, 0x66, 0x74, 0x65, 0x72, 0x12, 0x1c, 0x0a, 0x09, 0x50, 0x75, 0x62, 0x6c, 0x69,
+	0x63, 0x4b, 0x65, 0x79, 0x18, 0x07, 0x20, 0x01, 0x28, 0x0c, 0x52, 0x09, 0x50, 0x75, 0x62, 0x6c,
+	0x69, 0x63, 0x4b, 0x65, 0x79, 0x12, 0x12, 0x0a, 0x04, 0x49, 0x73, 0x43, 0x41, 0x18, 0x08, 0x20,
+	0x01, 0x28, 0x08, 0x52, 0x04, 0x49, 0x73, 0x43, 0x41, 0x12, 0x16, 0x0a, 0x06, 0x49, 0x73, 0x73,
+	0x75, 0x65, 0x72, 0x18, 0x09, 0x20, 0x01, 0x28, 0x0c, 0x52, 0x06, 0x49, 0x73, 0x73, 0x75, 0x65,
+	0x72, 0x42, 0x20, 0x5a, 0x1e, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f,
+	0x73, 0x6c, 0x61, 0x63, 0x6b, 0x68, 0x71, 0x2f, 0x6e, 0x65, 0x62, 0x75, 0x6c, 0x61, 0x2f, 0x63,
+	0x65, 0x72, 0x74, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
-func init() { proto.RegisterFile("cert.proto", fileDescriptor_a142e29cbef9b1cf) }
+var (
+	file_cert_proto_rawDescOnce sync.Once
+	file_cert_proto_rawDescData = file_cert_proto_rawDesc
+)
 
-var fileDescriptor_a142e29cbef9b1cf = []byte{
-	// 279 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x7c, 0x90, 0xcf, 0x4a, 0xf4, 0x30,
-	0x14, 0xc5, 0xc9, 0xa4, 0x5f, 0xdb, 0xe4, 0x53, 0x90, 0x20, 0x12, 0xd4, 0x45, 0x9c, 0x55, 0x56,
-	0xb3, 0xd0, 0xa5, 0xab, 0x71, 0x04, 0x29, 0x42, 0x91, 0xcc, 0x13, 0xa4, 0xf5, 0x76, 0x08, 0x74,
-	0x9a, 0x9a, 0x3f, 0x88, 0x8f, 0xee, 0x4e, 0x9a, 0x4e, 0x77, 0xe2, 0xee, 0x9e, 0x5f, 0xce, 0x49,
-	0x4e, 0x2e, 0xa5, 0x2d, 0xb8, 0xb0, 0x19, 0x9d, 0x0d, 0x96, 0x65, 0xd3, 0xbc, 0xfe, 0xa0, 0x97,
-	0x4a, 0x7f, 0xd6, 0xd0, 0xc4, 0x5e, 0xef, 0xc0, 0x05, 0xd3, 0x99, 0x56, 0x07, 0x60, 0x8f, 0xb4,
-	0x78, 0x86, 0xa0, 0x4d, 0xef, 0x39, 0x12, 0x48, 0xfe, 0xbf, 0xbf, 0xdb, 0xa4, 0xec, 0x6f, 0xe6,
-	0x93, 0x51, 0x15, 0xef, 0xf3, 0xc0, 0x6e, 0x29, 0xd9, 0x9b, 0xc3, 0xa0, 0x43, 0x74, 0xc0, 0x57,
-	0x02, 0xc9, 0x33, 0x45, 0xfc, 0x02, 0xd6, 0xdf, 0x88, 0xde, 0xfc, 0x71, 0x0d, 0x63, 0x34, 0xab,
-	0xf5, 0x11, 0xd2, 0xbb, 0x44, 0x65, 0x83, 0x3e, 0x02, 0xbb, 0xa0, 0xb8, 0x1a, 0x3d, 0x5f, 0x09,
-	0x2c, 0xcf, 0x15, 0x36, 0xa3, 0x67, 0x9c, 0x16, 0xfb, 0xd8, 0x0c, 0x10, 0x3c, 0xc7, 0x89, 0x16,
-	0x7e, 0x96, 0xec, 0x8a, 0xe6, 0x2f, 0xce, 0xc6, 0xd1, 0xf3, 0x4c, 0x60, 0x49, 0x54, 0x7e, 0x48,
-	0x6a, 0x6a, 0x55, 0xdb, 0xf0, 0x04, 0x9d, 0x75, 0xc0, 0xff, 0x09, 0x24, 0xb1, 0x22, 0xc3, 0x02,
-	0xd8, 0x35, 0x2d, 0x6b, 0x1b, 0xb6, 0x5d, 0x00, 0xc7, 0xf3, 0x74, 0x58, 0x0e, 0x27, 0x3d, 0x25,
-	0xdf, 0x62, 0xd3, 0x9b, 0xf6, 0x15, 0xbe, 0x78, 0x31, 0xff, 0x67, 0x5c, 0xc0, 0xd4, 0xb7, 0xf2,
-	0xbb, 0x2d, 0x2f, 0x05, 0x92, 0xa5, 0xca, 0x8c, 0xdf, 0x6d, 0xa7, 0x0e, 0x95, 0xf7, 0x11, 0x1c,
-	0x27, 0xc9, 0x9e, 0x9b, 0xa4, 0x9a, 0x3c, 0xed, 0xfe, 0xe1, 0x27, 0x00, 0x00, 0xff, 0xff, 0x2c,
-	0xe3, 0x08, 0x37, 0x89, 0x01, 0x00, 0x00,
+func file_cert_proto_rawDescGZIP() []byte {
+	file_cert_proto_rawDescOnce.Do(func() {
+		file_cert_proto_rawDescData = protoimpl.X.CompressGZIP(file_cert_proto_rawDescData)
+	})
+	return file_cert_proto_rawDescData
+}
+
+var file_cert_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
+var file_cert_proto_goTypes = []interface{}{
+	(*RawNebulaCertificate)(nil),        // 0: cert.RawNebulaCertificate
+	(*RawNebulaCertificateDetails)(nil), // 1: cert.RawNebulaCertificateDetails
+}
+var file_cert_proto_depIdxs = []int32{
+	1, // 0: cert.RawNebulaCertificate.Details:type_name -> cert.RawNebulaCertificateDetails
+	1, // [1:1] is the sub-list for method output_type
+	1, // [1:1] is the sub-list for method input_type
+	1, // [1:1] is the sub-list for extension type_name
+	1, // [1:1] is the sub-list for extension extendee
+	0, // [0:1] is the sub-list for field type_name
+}
+
+func init() { file_cert_proto_init() }
+func file_cert_proto_init() {
+	if File_cert_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_cert_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*RawNebulaCertificate); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_cert_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*RawNebulaCertificateDetails); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_cert_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   2,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_cert_proto_goTypes,
+		DependencyIndexes: file_cert_proto_depIdxs,
+		MessageInfos:      file_cert_proto_msgTypes,
+	}.Build()
+	File_cert_proto = out.File
+	file_cert_proto_rawDesc = nil
+	file_cert_proto_goTypes = nil
+	file_cert_proto_depIdxs = nil
 }

cert/cert.proto

@@ -1,6 +1,8 @@
 syntax = "proto3";
 package cert;
 
+option go_package = "github.com/slackhq/nebula/cert";
+
 //import "google/protobuf/timestamp.proto";
 
 message RawNebulaCertificate {

cert/cert_test.go

@@ -447,6 +447,255 @@ BVG+oJpAoqokUBbI4U0N8CSfpUABEkB/Pm5A2xyH/nc8mg/wvGUWG3pZ7nHzaDMf
 	assert.Equal(t, pp.CAs[string("5c9c3f23e7ee7fe97637cbd3a0a5b854154d1d9aaaf7b566a51f4a88f76b64cd")].Details.Name, rootCA01.Details.Name)
 }
 
+func appendByteSlices(b ...[]byte) []byte {
+	retSlice := []byte{}
+	for _, v := range b {
+		retSlice = append(retSlice, v...)
+	}
+	return retSlice
+}
+
+func TestUnmrshalCertPEM(t *testing.T) {
+	goodCert := []byte(`
+# A good cert
+-----BEGIN NEBULA CERTIFICATE-----
+CkAKDm5lYnVsYSByb290IGNhKJfap9AFMJfg1+YGOiCUQGByMuNRhIlQBOyzXWbL
+vcKBwDhov900phEfJ5DN3kABEkDCq5R8qBiu8sl54yVfgRcQXEDt3cHr8UTSLszv
+bzBEr00kERQxxTzTsH8cpYEgRoipvmExvg8WP8NdAJEYJosB
+-----END NEBULA CERTIFICATE-----
+`)
+	badBanner := []byte(`# A bad banner
+-----BEGIN NOT A NEBULA CERTIFICATE-----
+CkAKDm5lYnVsYSByb290IGNhKJfap9AFMJfg1+YGOiCUQGByMuNRhIlQBOyzXWbL
+vcKBwDhov900phEfJ5DN3kABEkDCq5R8qBiu8sl54yVfgRcQXEDt3cHr8UTSLszv
+bzBEr00kERQxxTzTsH8cpYEgRoipvmExvg8WP8NdAJEYJosB
+-----END NOT A NEBULA CERTIFICATE-----
+`)
+	invalidPem := []byte(`# Not a valid PEM format
+-BEGIN NEBULA CERTIFICATE-----
+CkAKDm5lYnVsYSByb290IGNhKJfap9AFMJfg1+YGOiCUQGByMuNRhIlQBOyzXWbL
+vcKBwDhov900phEfJ5DN3kABEkDCq5R8qBiu8sl54yVfgRcQXEDt3cHr8UTSLszv
+bzBEr00kERQxxTzTsH8cpYEgRoipvmExvg8WP8NdAJEYJosB
+-END NEBULA CERTIFICATE----`)
+
+	certBundle := appendByteSlices(goodCert, badBanner, invalidPem)
+
+	// Success test case
+	cert, rest, err := UnmarshalNebulaCertificateFromPEM(certBundle)
+	assert.NotNil(t, cert)
+	assert.Equal(t, rest, append(badBanner, invalidPem...))
+	assert.Nil(t, err)
+
+	// Fail due to invalid banner.
+	cert, rest, err = UnmarshalNebulaCertificateFromPEM(rest)
+	assert.Nil(t, cert)
+	assert.Equal(t, rest, invalidPem)
+	assert.EqualError(t, err, "bytes did not contain a proper nebula certificate banner")
+
+	// Fail due to ivalid PEM format, because
+	// it's missing the requisite pre-encapsulation boundary.
+	cert, rest, err = UnmarshalNebulaCertificateFromPEM(rest)
+	assert.Nil(t, cert)
+	assert.Equal(t, rest, invalidPem)
+	assert.EqualError(t, err, "input did not contain a valid PEM encoded block")
+}
+
+func TestUnmarshalEd25519PrivateKey(t *testing.T) {
+	privKey := []byte(`# A good key
+-----BEGIN NEBULA ED25519 PRIVATE KEY-----
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==
+-----END NEBULA ED25519 PRIVATE KEY-----
+`)
+	shortKey := []byte(`# A short key
+-----BEGIN NEBULA ED25519 PRIVATE KEY-----
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+-----END NEBULA ED25519 PRIVATE KEY-----
+`)
+	invalidBanner := []byte(`# Invalid banner
+-----BEGIN NOT A NEBULA PRIVATE KEY-----
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==
+-----END NOT A NEBULA PRIVATE KEY-----
+`)
+	invalidPem := []byte(`# Not a valid PEM format
+-BEGIN NEBULA ED25519 PRIVATE KEY-----
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==
+-END NEBULA ED25519 PRIVATE KEY-----`)
+
+	keyBundle := appendByteSlices(privKey, shortKey, invalidBanner, invalidPem)
+
+	// Success test case
+	k, rest, err := UnmarshalEd25519PrivateKey(keyBundle)
+	assert.Len(t, k, 64)
+	assert.Equal(t, rest, appendByteSlices(shortKey, invalidBanner, invalidPem))
+	assert.Nil(t, err)
+
+	// Fail due to short key
+	k, rest, err = UnmarshalEd25519PrivateKey(rest)
+	assert.Nil(t, k)
+	assert.Equal(t, rest, appendByteSlices(invalidBanner, invalidPem))
+	assert.EqualError(t, err, "key was not 64 bytes, is invalid ed25519 private key")
+
+	// Fail due to invalid banner
+	k, rest, err = UnmarshalEd25519PrivateKey(rest)
+	assert.Nil(t, k)
+	assert.Equal(t, rest, invalidPem)
+	assert.EqualError(t, err, "bytes did not contain a proper nebula Ed25519 private key banner")
+
+	// Fail due to ivalid PEM format, because
+	// it's missing the requisite pre-encapsulation boundary.
+	k, rest, err = UnmarshalEd25519PrivateKey(rest)
+	assert.Nil(t, k)
+	assert.Equal(t, rest, invalidPem)
+	assert.EqualError(t, err, "input did not contain a valid PEM encoded block")
+}
+
+func TestUnmarshalX25519PrivateKey(t *testing.T) {
+	privKey := []byte(`# A good key
+-----BEGIN NEBULA X25519 PRIVATE KEY-----
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=
+-----END NEBULA X25519 PRIVATE KEY-----
+`)
+	shortKey := []byte(`# A short key
+-----BEGIN NEBULA X25519 PRIVATE KEY-----
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==
+-----END NEBULA X25519 PRIVATE KEY-----
+`)
+	invalidBanner := []byte(`# Invalid banner
+-----BEGIN NOT A NEBULA PRIVATE KEY-----
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=
+-----END NOT A NEBULA PRIVATE KEY-----
+`)
+	invalidPem := []byte(`# Not a valid PEM format
+-BEGIN NEBULA X25519 PRIVATE KEY-----
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=
+-END NEBULA X25519 PRIVATE KEY-----`)
+
+	keyBundle := appendByteSlices(privKey, shortKey, invalidBanner, invalidPem)
+
+	// Success test case
+	k, rest, err := UnmarshalX25519PrivateKey(keyBundle)
+	assert.Len(t, k, 32)
+	assert.Equal(t, rest, appendByteSlices(shortKey, invalidBanner, invalidPem))
+	assert.Nil(t, err)
+
+	// Fail due to short key
+	k, rest, err = UnmarshalX25519PrivateKey(rest)
+	assert.Nil(t, k)
+	assert.Equal(t, rest, appendByteSlices(invalidBanner, invalidPem))
+	assert.EqualError(t, err, "key was not 32 bytes, is invalid X25519 private key")
+
+	// Fail due to invalid banner
+	k, rest, err = UnmarshalX25519PrivateKey(rest)
+	assert.Nil(t, k)
+	assert.Equal(t, rest, invalidPem)
+	assert.EqualError(t, err, "bytes did not contain a proper nebula X25519 private key banner")
+
+	// Fail due to ivalid PEM format, because
+	// it's missing the requisite pre-encapsulation boundary.
+	k, rest, err = UnmarshalX25519PrivateKey(rest)
+	assert.Nil(t, k)
+	assert.Equal(t, rest, invalidPem)
+	assert.EqualError(t, err, "input did not contain a valid PEM encoded block")
+}
+
+func TestUnmarshalEd25519PublicKey(t *testing.T) {
+	pubKey := []byte(`# A good key
+-----BEGIN NEBULA ED25519 PUBLIC KEY-----
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=
+-----END NEBULA ED25519 PUBLIC KEY-----
+`)
+	shortKey := []byte(`# A short key
+-----BEGIN NEBULA ED25519 PUBLIC KEY-----
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==
+-----END NEBULA ED25519 PUBLIC KEY-----
+`)
+	invalidBanner := []byte(`# Invalid banner
+-----BEGIN NOT A NEBULA PUBLIC KEY-----
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=
+-----END NOT A NEBULA PUBLIC KEY-----
+`)
+	invalidPem := []byte(`# Not a valid PEM format
+-BEGIN NEBULA ED25519 PUBLIC KEY-----
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=
+-END NEBULA ED25519 PUBLIC KEY-----`)
+
+	keyBundle := appendByteSlices(pubKey, shortKey, invalidBanner, invalidPem)
+
+	// Success test case
+	k, rest, err := UnmarshalEd25519PublicKey(keyBundle)
+	assert.Equal(t, len(k), 32)
+	assert.Nil(t, err)
+	assert.Equal(t, rest, appendByteSlices(shortKey, invalidBanner, invalidPem))
+
+	// Fail due to short key
+	k, rest, err = UnmarshalEd25519PublicKey(rest)
+	assert.Nil(t, k)
+	assert.Equal(t, rest, appendByteSlices(invalidBanner, invalidPem))
+	assert.EqualError(t, err, "key was not 32 bytes, is invalid ed25519 public key")
+
+	// Fail due to invalid banner
+	k, rest, err = UnmarshalEd25519PublicKey(rest)
+	assert.Nil(t, k)
+	assert.EqualError(t, err, "bytes did not contain a proper nebula Ed25519 public key banner")
+	assert.Equal(t, rest, invalidPem)
+
+	// Fail due to ivalid PEM format, because
+	// it's missing the requisite pre-encapsulation boundary.
+	k, rest, err = UnmarshalEd25519PublicKey(rest)
+	assert.Nil(t, k)
+	assert.Equal(t, rest, invalidPem)
+	assert.EqualError(t, err, "input did not contain a valid PEM encoded block")
+}
+
+func TestUnmarshalX25519PublicKey(t *testing.T) {
+	pubKey := []byte(`# A good key
+-----BEGIN NEBULA X25519 PUBLIC KEY-----
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=
+-----END NEBULA X25519 PUBLIC KEY-----
+`)
+	shortKey := []byte(`# A short key
+-----BEGIN NEBULA X25519 PUBLIC KEY-----
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==
+-----END NEBULA X25519 PUBLIC KEY-----
+`)
+	invalidBanner := []byte(`# Invalid banner
+-----BEGIN NOT A NEBULA PUBLIC KEY-----
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=
+-----END NOT A NEBULA PUBLIC KEY-----
+`)
+	invalidPem := []byte(`# Not a valid PEM format
+-BEGIN NEBULA X25519 PUBLIC KEY-----
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=
+-END NEBULA X25519 PUBLIC KEY-----`)
+
+	keyBundle := appendByteSlices(pubKey, shortKey, invalidBanner, invalidPem)
+
+	// Success test case
+	k, rest, err := UnmarshalX25519PublicKey(keyBundle)
+	assert.Equal(t, len(k), 32)
+	assert.Nil(t, err)
+	assert.Equal(t, rest, appendByteSlices(shortKey, invalidBanner, invalidPem))
+
+	// Fail due to short key
+	k, rest, err = UnmarshalX25519PublicKey(rest)
+	assert.Nil(t, k)
+	assert.Equal(t, rest, appendByteSlices(invalidBanner, invalidPem))
+	assert.EqualError(t, err, "key was not 32 bytes, is invalid X25519 public key")
+
+	// Fail due to invalid banner
+	k, rest, err = UnmarshalX25519PublicKey(rest)
+	assert.Nil(t, k)
+	assert.EqualError(t, err, "bytes did not contain a proper nebula X25519 public key banner")
+	assert.Equal(t, rest, invalidPem)
+
+	// Fail due to ivalid PEM format, because
+	// it's missing the requisite pre-encapsulation boundary.
+	k, rest, err = UnmarshalX25519PublicKey(rest)
+	assert.Nil(t, k)
+	assert.Equal(t, rest, invalidPem)
+	assert.EqualError(t, err, "input did not contain a valid PEM encoded block")
+}
+
 // Ensure that upgrading the protobuf library does not change how certificates
 // are marshalled, since this would break signature verification
 func TestMarshalingNebulaCertificateConsistency(t *testing.T) {
@@ -499,6 +748,13 @@ func TestNebulaCertificate_Copy(t *testing.T) {
 	util.AssertDeepCopyEqual(t, c, cc)
 }
 
+func TestUnmarshalNebulaCertificate(t *testing.T) {
+	// Test that we don't panic with an invalid certificate (#332)
+	data := []byte("\x98\x00\x00")
+	_, err := UnmarshalNebulaCertificate(data)
+	assert.EqualError(t, err, "encoded Details was nil")
+}
+
 func newTestCaCert(before, after time.Time, ips, subnets []*net.IPNet, groups []string) (*NebulaCertificate, []byte, []byte, error) {
 	pub, priv, err := ed25519.GenerateKey(rand.Reader)
 	if before.IsZero() {

cidr6_radix.go

@@ -0,0 +1,184 @@
+package nebula
+
+import (
+	"encoding/binary"
+	"net"
+)
+
+const startbit6 = uint64(1 << 63)
+
+type CIDR6Tree struct {
+	root4 *CIDRNode
+	root6 *CIDRNode
+}
+
+func NewCIDR6Tree() *CIDR6Tree {
+	tree := new(CIDR6Tree)
+	tree.root4 = &CIDRNode{}
+	tree.root6 = &CIDRNode{}
+	return tree
+}
+
+func (tree *CIDR6Tree) AddCIDR(cidr *net.IPNet, val interface{}) {
+	var node, next *CIDRNode
+
+	cidrIP, ipv4 := isIPV4(cidr.IP)
+	if ipv4 {
+		node = tree.root4
+		next = tree.root4
+
+	} else {
+		node = tree.root6
+		next = tree.root6
+	}
+
+	for i := 0; i < len(cidrIP); i += 4 {
+		ip := binary.BigEndian.Uint32(cidrIP[i : i+4])
+		mask := binary.BigEndian.Uint32(cidr.Mask[i : i+4])
+		bit := startbit
+
+		// Find our last ancestor in the tree
+		for bit&mask != 0 {
+			if ip&bit != 0 {
+				next = node.right
+			} else {
+				next = node.left
+			}
+
+			if next == nil {
+				break
+			}
+
+			bit = bit >> 1
+			node = next
+		}
+
+		// Build up the rest of the tree we don't already have
+		for bit&mask != 0 {
+			next = &CIDRNode{}
+			next.parent = node
+
+			if ip&bit != 0 {
+				node.right = next
+			} else {
+				node.left = next
+			}
+
+			bit >>= 1
+			node = next
+		}
+	}
+
+	// Final node marks our cidr, set the value
+	node.value = val
+}
+
+// Finds the most specific match
+func (tree *CIDR6Tree) MostSpecificContains(ip net.IP) (value interface{}) {
+	var node *CIDRNode
+
+	wholeIP, ipv4 := isIPV4(ip)
+	if ipv4 {
+		node = tree.root4
+	} else {
+		node = tree.root6
+	}
+
+	for i := 0; i < len(wholeIP); i += 4 {
+		ip := ip2int(wholeIP[i : i+4])
+		bit := startbit
+
+		for node != nil {
+			if node.value != nil {
+				value = node.value
+			}
+
+			if bit == 0 {
+				break
+			}
+
+			if ip&bit != 0 {
+				node = node.right
+			} else {
+				node = node.left
+			}
+
+			bit >>= 1
+		}
+	}
+
+	return value
+}
+
+func (tree *CIDR6Tree) MostSpecificContainsIpV4(ip uint32) (value interface{}) {
+	bit := startbit
+	node := tree.root4
+
+	for node != nil {
+		if node.value != nil {
+			value = node.value
+		}
+
+		if ip&bit != 0 {
+			node = node.right
+		} else {
+			node = node.left
+		}
+
+		bit >>= 1
+	}
+
+	return value
+}
+
+func (tree *CIDR6Tree) MostSpecificContainsIpV6(hi, lo uint64) (value interface{}) {
+	ip := hi
+	node := tree.root6
+
+	for i := 0; i < 2; i++ {
+		bit := startbit6
+
+		for node != nil {
+			if node.value != nil {
+				value = node.value
+			}
+
+			if bit == 0 {
+				break
+			}
+
+			if ip&bit != 0 {
+				node = node.right
+			} else {
+				node = node.left
+			}
+
+			bit >>= 1
+		}
+
+		ip = lo
+	}
+
+	return value
+}
+
+func isIPV4(ip net.IP) (net.IP, bool) {
+	if len(ip) == net.IPv4len {
+		return ip, true
+	}
+
+	if len(ip) == net.IPv6len && isZeros(ip[0:10]) && ip[10] == 0xff && ip[11] == 0xff {
+		return ip[12:16], true
+	}
+
+	return ip, false
+}
+
+func isZeros(p net.IP) bool {
+	for i := 0; i < len(p); i++ {
+		if p[i] != 0 {
+			return false
+		}
+	}
+	return true
+}

cidr6_radix_test.go

@@ -0,0 +1,77 @@
+package nebula
+
+import (
+	"net"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestCIDR6Tree_MostSpecificContains(t *testing.T) {
+	tree := NewCIDR6Tree()
+	tree.AddCIDR(getCIDR("1.0.0.0/8"), "1")
+	tree.AddCIDR(getCIDR("2.1.0.0/16"), "2")
+	tree.AddCIDR(getCIDR("3.1.1.0/24"), "3")
+	tree.AddCIDR(getCIDR("4.1.1.1/24"), "4a")
+	tree.AddCIDR(getCIDR("4.1.1.1/30"), "4b")
+	tree.AddCIDR(getCIDR("4.1.1.1/32"), "4c")
+	tree.AddCIDR(getCIDR("254.0.0.0/4"), "5")
+	tree.AddCIDR(getCIDR("1:2:0:4:5:0:0:0/64"), "6a")
+	tree.AddCIDR(getCIDR("1:2:0:4:5:0:0:0/80"), "6b")
+	tree.AddCIDR(getCIDR("1:2:0:4:5:0:0:0/96"), "6c")
+
+	tests := []struct {
+		Result interface{}
+		IP     string
+	}{
+		{"1", "1.0.0.0"},
+		{"1", "1.255.255.255"},
+		{"2", "2.1.0.0"},
+		{"2", "2.1.255.255"},
+		{"3", "3.1.1.0"},
+		{"3", "3.1.1.255"},
+		{"4a", "4.1.1.255"},
+		{"4b", "4.1.1.2"},
+		{"4c", "4.1.1.1"},
+		{"5", "240.0.0.0"},
+		{"5", "255.255.255.255"},
+		{"6a", "1:2:0:4:1:1:1:1"},
+		{"6b", "1:2:0:4:5:1:1:1"},
+		{"6c", "1:2:0:4:5:0:0:0"},
+		{nil, "239.0.0.0"},
+		{nil, "4.1.2.2"},
+	}
+
+	for _, tt := range tests {
+		assert.Equal(t, tt.Result, tree.MostSpecificContains(net.ParseIP(tt.IP)))
+	}
+
+	tree = NewCIDR6Tree()
+	tree.AddCIDR(getCIDR("1.1.1.1/0"), "cool")
+	tree.AddCIDR(getCIDR("::/0"), "cool6")
+	assert.Equal(t, "cool", tree.MostSpecificContains(net.ParseIP("0.0.0.0")))
+	assert.Equal(t, "cool", tree.MostSpecificContains(net.ParseIP("255.255.255.255")))
+	assert.Equal(t, "cool6", tree.MostSpecificContains(net.ParseIP("::")))
+	assert.Equal(t, "cool6", tree.MostSpecificContains(net.ParseIP("1:2:3:4:5:6:7:8")))
+}
+
+func TestCIDR6Tree_MostSpecificContainsIpV6(t *testing.T) {
+	tree := NewCIDR6Tree()
+	tree.AddCIDR(getCIDR("1:2:0:4:5:0:0:0/64"), "6a")
+	tree.AddCIDR(getCIDR("1:2:0:4:5:0:0:0/80"), "6b")
+	tree.AddCIDR(getCIDR("1:2:0:4:5:0:0:0/96"), "6c")
+
+	tests := []struct {
+		Result interface{}
+		IP     string
+	}{
+		{"6a", "1:2:0:4:1:1:1:1"},
+		{"6b", "1:2:0:4:5:1:1:1"},
+		{"6c", "1:2:0:4:5:0:0:0"},
+	}
+
+	for _, tt := range tests {
+		ip := NewIp6AndPort(net.ParseIP(tt.IP), 0)
+		assert.Equal(t, tt.Result, tree.MostSpecificContainsIpV6(ip.Hi, ip.Lo))
+	}
+}

cidr_radix.go

@@ -76,7 +76,7 @@ func (tree *CIDRTree) AddCIDR(cidr *net.IPNet, val interface{}) {
 	node.value = val
 }
 
-// Finds the first match, which way be the least specific
+// Finds the first match, which may be the least specific
 func (tree *CIDRTree) Contains(ip uint32) (value interface{}) {
 	bit := startbit
 	node := tree.root
@@ -116,7 +116,6 @@ func (tree *CIDRTree) MostSpecificContains(ip uint32) (value interface{}) {
 		}
 
 		bit >>= 1
-
 	}
 
 	return value

cmd/nebula-cert/ca.go

@@ -11,6 +11,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/skip2/go-qrcode"
 	"github.com/slackhq/nebula/cert"
 	"golang.org/x/crypto/ed25519"
 )
@@ -21,6 +22,7 @@ type caFlags struct {
 	duration    *time.Duration
 	outKeyPath  *string
 	outCertPath *string
+	outQRPath   *string
 	groups      *string
 	ips         *string
 	subnets     *string
@@ -33,6 +35,7 @@ func newCaFlags() *caFlags {
 	cf.duration = cf.set.Duration("duration", time.Duration(time.Hour*8760), "Optional: amount of time the certificate should be valid for. Valid time units are seconds: \"s\", minutes: \"m\", hours: \"h\"")
 	cf.outKeyPath = cf.set.String("out-key", "ca.key", "Optional: path to write the private key to")
 	cf.outCertPath = cf.set.String("out-crt", "ca.crt", "Optional: path to write the certificate to")
+	cf.outQRPath = cf.set.String("out-qr", "", "Optional: output a qr code image (png) of the certificate")
 	cf.groups = cf.set.String("groups", "", "Optional: comma separated list of groups. This will limit which groups subordinate certs can use")
 	cf.ips = cf.set.String("ips", "", "Optional: comma separated list of ip and network in CIDR notation. This will limit which ip addresses and networks subordinate certs can use")
 	cf.subnets = cf.set.String("subnets", "", "Optional: comma separated list of ip and network in CIDR notation. This will limit which subnet addresses and networks subordinate certs can use")
@@ -146,6 +149,18 @@ func ca(args []string, out io.Writer, errOut io.Writer) error {
 		return fmt.Errorf("error while writing out-crt: %s", err)
 	}
 
+	if *cf.outQRPath != "" {
+		b, err = qrcode.Encode(string(b), qrcode.Medium, -5)
+		if err != nil {
+			return fmt.Errorf("error while generating qr code: %s", err)
+		}
+
+		err = ioutil.WriteFile(*cf.outQRPath, b, 0600)
+		if err != nil {
+			return fmt.Errorf("error while writing out-qr: %s", err)
+		}
+	}
+
 	return nil
 }
 

cmd/nebula-cert/ca_test.go

@@ -37,6 +37,8 @@ func Test_caHelp(t *testing.T) {
 			"    \tOptional: path to write the certificate to (default \"ca.crt\")\n"+
 			"  -out-key string\n"+
 			"    \tOptional: path to write the private key to (default \"ca.key\")\n"+
+			"  -out-qr string\n"+
+			"    \tOptional: output a qr code image (png) of the certificate\n"+
 			"  -subnets string\n"+
 			"    \tOptional: comma separated list of ip and network in CIDR notation. This will limit which subnet addresses and networks subordinate certs can use\n",
 		ob.String(),

cmd/nebula-cert/print.go

@@ -9,19 +9,22 @@ import (
 	"os"
 	"strings"
 
+	"github.com/skip2/go-qrcode"
 	"github.com/slackhq/nebula/cert"
 )
 
 type printFlags struct {
-	set  *flag.FlagSet
-	json *bool
-	path *string
+	set       *flag.FlagSet
+	json      *bool
+	outQRPath *string
+	path      *string
 }
 
 func newPrintFlags() *printFlags {
 	pf := printFlags{set: flag.NewFlagSet("print", flag.ContinueOnError)}
 	pf.set.Usage = func() {}
 	pf.json = pf.set.Bool("json", false, "Optional: outputs certificates in json format")
+	pf.outQRPath = pf.set.String("out-qr", "", "Optional: output a qr code image (png) of the certificate")
 	pf.path = pf.set.String("path", "", "Required: path to the certificate")
 
 	return &pf
@@ -44,6 +47,8 @@ func printCert(args []string, out io.Writer, errOut io.Writer) error {
 	}
 
 	var c *cert.NebulaCertificate
+	var qrBytes []byte
+	part := 0
 
 	for {
 		c, rawCert, err = cert.UnmarshalNebulaCertificateFromPEM(rawCert)
@@ -61,9 +66,31 @@ func printCert(args []string, out io.Writer, errOut io.Writer) error {
 			out.Write([]byte("\n"))
 		}
 
+		if *pf.outQRPath != "" {
+			b, err := c.MarshalToPEM()
+			if err != nil {
+				return fmt.Errorf("error while marshalling cert to PEM: %s", err)
+			}
+			qrBytes = append(qrBytes, b...)
+		}
+
 		if rawCert == nil || len(rawCert) == 0 || strings.TrimSpace(string(rawCert)) == "" {
 			break
 		}
+
+		part++
+	}
+
+	if *pf.outQRPath != "" {
+		b, err := qrcode.Encode(string(qrBytes), qrcode.Medium, -5)
+		if err != nil {
+			return fmt.Errorf("error while generating qr code: %s", err)
+		}
+
+		err = ioutil.WriteFile(*pf.outQRPath, b, 0600)
+		if err != nil {
+			return fmt.Errorf("error while writing out-qr: %s", err)
+		}
 	}
 
 	return nil

cmd/nebula-cert/print_test.go

@@ -23,6 +23,8 @@ func Test_printHelp(t *testing.T) {
 		"Usage of "+os.Args[0]+" print <flags>: prints details about a certificate\n"+
 			"  -json\n"+
 			"    \tOptional: outputs certificates in json format\n"+
+			"  -out-qr string\n"+
+			"    \tOptional: output a qr code image (png) of the certificate\n"+
 			"  -path string\n"+
 			"    \tRequired: path to the certificate\n",
 		ob.String(),

cmd/nebula-cert/sign.go

@@ -11,6 +11,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/skip2/go-qrcode"
 	"github.com/slackhq/nebula/cert"
 	"golang.org/x/crypto/curve25519"
 )
@@ -25,6 +26,7 @@ type signFlags struct {
 	inPubPath   *string
 	outKeyPath  *string
 	outCertPath *string
+	outQRPath   *string
 	groups      *string
 	subnets     *string
 }
@@ -40,8 +42,9 @@ func newSignFlags() *signFlags {
 	sf.inPubPath = sf.set.String("in-pub", "", "Optional (if out-key not set): path to read a previously generated public key")
 	sf.outKeyPath = sf.set.String("out-key", "", "Optional (if in-pub not set): path to write the private key to")
 	sf.outCertPath = sf.set.String("out-crt", "", "Optional: path to write the certificate to")
+	sf.outQRPath = sf.set.String("out-qr", "", "Optional: output a qr code image (png) of the certificate")
 	sf.groups = sf.set.String("groups", "", "Optional: comma separated list of groups")
-	sf.subnets = sf.set.String("subnets", "", "Optional: comma seperated list of subnet this cert can serve for")
+	sf.subnets = sf.set.String("subnets", "", "Optional: comma separated list of subnet this cert can serve for")
 	return &sf
 
 }
@@ -203,6 +206,18 @@ func signCert(args []string, out io.Writer, errOut io.Writer) error {
 		return fmt.Errorf("error while writing out-crt: %s", err)
 	}
 
+	if *sf.outQRPath != "" {
+		b, err = qrcode.Encode(string(b), qrcode.Medium, -5)
+		if err != nil {
+			return fmt.Errorf("error while generating qr code: %s", err)
+		}
+
+		err = ioutil.WriteFile(*sf.outQRPath, b, 0600)
+		if err != nil {
+			return fmt.Errorf("error while writing out-qr: %s", err)
+		}
+	}
+
 	return nil
 }
 

cmd/nebula-cert/sign_test.go

@@ -45,8 +45,10 @@ func Test_signHelp(t *testing.T) {
 			"    \tOptional: path to write the certificate to\n"+
 			"  -out-key string\n"+
 			"    \tOptional (if in-pub not set): path to write the private key to\n"+
+			"  -out-qr string\n"+
+			"    \tOptional: output a qr code image (png) of the certificate\n"+
 			"  -subnets string\n"+
-			"    \tOptional: comma seperated list of subnet this cert can serve for\n",
+			"    \tOptional: comma separated list of subnet this cert can serve for\n",
 		ob.String(),
 	)
 }
@@ -286,5 +288,4 @@ func Test_signCert(t *testing.T) {
 	assert.EqualError(t, signCert(args, ob, eb), "refusing to overwrite existing cert: "+crtF.Name())
 	assert.Empty(t, ob.String())
 	assert.Empty(t, eb.String())
-
 }

cmd/nebula-service/logs_generic.go

@@ -0,0 +1,9 @@
+// +build !windows
+
+package main
+
+import "github.com/sirupsen/logrus"
+
+func HookLogger(l *logrus.Logger) {
+	// Do nothing, let the logs flow to stdout/stderr
+}

cmd/nebula-service/logs_windows.go

@@ -0,0 +1,54 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+
+	"github.com/kardianos/service"
+	"github.com/sirupsen/logrus"
+)
+
+// HookLogger routes the logrus logs through the service logger so that they end up in the Windows Event Viewer
+// logrus output will be discarded
+func HookLogger(l *logrus.Logger) {
+	l.AddHook(newLogHook(logger))
+	l.SetOutput(ioutil.Discard)
+}
+
+type logHook struct {
+	sl service.Logger
+}
+
+func newLogHook(sl service.Logger) *logHook {
+	return &logHook{sl: sl}
+}
+
+func (h *logHook) Fire(entry *logrus.Entry) error {
+	line, err := entry.String()
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Unable to read entry, %v", err)
+		return err
+	}
+
+	switch entry.Level {
+	case logrus.PanicLevel:
+		return h.sl.Error(line)
+	case logrus.FatalLevel:
+		return h.sl.Error(line)
+	case logrus.ErrorLevel:
+		return h.sl.Error(line)
+	case logrus.WarnLevel:
+		return h.sl.Warning(line)
+	case logrus.InfoLevel:
+		return h.sl.Info(line)
+	case logrus.DebugLevel:
+		return h.sl.Info(line)
+	default:
+		return nil
+	}
+}
+
+func (h *logHook) Levels() []logrus.Level {
+	return logrus.AllLevels
+}

cmd/nebula-service/main.go

@@ -46,15 +46,16 @@ func main() {
 		os.Exit(1)
 	}
 
-	config := nebula.NewConfig()
+	l := logrus.New()
+	l.Out = os.Stdout
+
+	config := nebula.NewConfig(l)
 	err := config.Load(*configPath)
 	if err != nil {
 		fmt.Printf("failed to load config: %s", err)
 		os.Exit(1)
 	}
 
-	l := logrus.New()
-	l.Out = os.Stdout
 	c, err := nebula.Main(config, *configTest, Build, l, nil)
 
 	switch v := err.(type) {

cmd/nebula-service/service.go

@@ -24,14 +24,15 @@ func (p *program) Start(s service.Service) error {
 	// Start should not block.
 	logger.Info("Nebula service starting.")
 
-	config := nebula.NewConfig()
+	l := logrus.New()
+	HookLogger(l)
+
+	config := nebula.NewConfig(l)
 	err := config.Load(*p.configPath)
 	if err != nil {
 		return fmt.Errorf("failed to load config: %s", err)
 	}
 
-	l := logrus.New()
-	l.Out = os.Stdout
 	p.control, err = nebula.Main(config, *p.configTest, Build, l, nil)
 	if err != nil {
 		return err
@@ -69,6 +70,10 @@ func doService(configPath *string, configTest *bool, build string, serviceFlag *
 		build:      build,
 	}
 
+	// Here are what the different loggers are doing:
+	// - `log` is the standard go log utility, meant to be used while the process is still attached to stdout/stderr
+	// - `logger` is the service log utility that may be attached to a special place depending on OS (Windows will have it attached to the event log)
+	// - above, in `Run` we create a `logrus.Logger` which is what nebula expects to use
 	s, err := service.New(prg, svcConfig)
 	if err != nil {
 		log.Fatal(err)
@@ -84,6 +89,7 @@ func doService(configPath *string, configTest *bool, build string, serviceFlag *
 		for {
 			err := <-errs
 			if err != nil {
+				// Route any errors from the system logger to stdout as a best effort to notice issues there
 				log.Print(err)
 			}
 		}
@@ -93,6 +99,7 @@ func doService(configPath *string, configTest *bool, build string, serviceFlag *
 	case "run":
 		err = s.Run()
 		if err != nil {
+			// Route any errors to the system logger
 			logger.Error(err)
 		}
 	default:

cmd/nebula/main.go

@@ -40,15 +40,16 @@ func main() {
 		os.Exit(1)
 	}
 
-	config := nebula.NewConfig()
+	l := logrus.New()
+	l.Out = os.Stdout
+
+	config := nebula.NewConfig(l)
 	err := config.Load(*configPath)
 	if err != nil {
 		fmt.Printf("failed to load config: %s", err)
 		os.Exit(1)
 	}
 
-	l := logrus.New()
-	l.Out = os.Stdout
 	c, err := nebula.Main(config, *configTest, Build, l, nil)
 
 	switch v := err.(type) {

config.go

@@ -26,11 +26,13 @@ type Config struct {
 	Settings    map[interface{}]interface{}
 	oldSettings map[interface{}]interface{}
 	callbacks   []func(*Config)
+	l           *logrus.Logger
 }
 
-func NewConfig() *Config {
+func NewConfig(l *logrus.Logger) *Config {
 	return &Config{
 		Settings: make(map[interface{}]interface{}),
+		l:        l,
 	}
 }
 
@@ -99,12 +101,12 @@ func (c *Config) HasChanged(k string) bool {
 
 	newVals, err := yaml.Marshal(nv)
 	if err != nil {
-		l.WithField("config_path", k).WithError(err).Error("Error while marshaling new config")
+		c.l.WithField("config_path", k).WithError(err).Error("Error while marshaling new config")
 	}
 
 	oldVals, err := yaml.Marshal(ov)
 	if err != nil {
-		l.WithField("config_path", k).WithError(err).Error("Error while marshaling old config")
+		c.l.WithField("config_path", k).WithError(err).Error("Error while marshaling old config")
 	}
 
 	return string(newVals) != string(oldVals)
@@ -118,7 +120,7 @@ func (c *Config) CatchHUP() {
 
 	go func() {
 		for range ch {
-			l.Info("Caught HUP, reloading config")
+			c.l.Info("Caught HUP, reloading config")
 			c.ReloadConfig()
 		}
 	}()
@@ -132,7 +134,7 @@ func (c *Config) ReloadConfig() {
 
 	err := c.Load(c.path)
 	if err != nil {
-		l.WithField("config_path", c.path).WithError(err).Error("Error occurred while reloading config")
+		c.l.WithField("config_path", c.path).WithError(err).Error("Error occurred while reloading config")
 		return
 	}
 
@@ -235,13 +237,18 @@ func (c *Config) GetAllowList(k string, allowInterfaces bool) (*AllowList, error
 		return nil, fmt.Errorf("config `%s` has invalid type: %T", k, r)
 	}
 
-	tree := NewCIDRTree()
+	tree := NewCIDR6Tree()
 	var nameRules []AllowListNameRule
 
-	firstValue := true
-	allValuesMatch := true
-	defaultSet := false
-	var allValues bool
+	// Keep track of the rules we have added for both ipv4 and ipv6
+	type allowListRules struct {
+		firstValue     bool
+		allValuesMatch bool
+		defaultSet     bool
+		allValues      bool
+	}
+	rules4 := allowListRules{firstValue: true, allValuesMatch: true, defaultSet: false}
+	rules6 := allowListRules{firstValue: true, allValuesMatch: true, defaultSet: false}
 
 	for rawKey, rawValue := range rawMap {
 		rawCIDR, ok := rawKey.(string)
@@ -276,31 +283,48 @@ func (c *Config) GetAllowList(k string, allowInterfaces bool) (*AllowList, error
 		// TODO: should we error on duplicate CIDRs in the config?
 		tree.AddCIDR(cidr, value)
 
-		if firstValue {
-			allValues = value
-			firstValue = false
+		maskBits, maskSize := cidr.Mask.Size()
+
+		var rules *allowListRules
+		if maskSize == 32 {
+			rules = &rules4
 		} else {
-			if value != allValues {
-				allValuesMatch = false
+			rules = &rules6
+		}
+
+		if rules.firstValue {
+			rules.allValues = value
+			rules.firstValue = false
+		} else {
+			if value != rules.allValues {
+				rules.allValuesMatch = false
 			}
 		}
 
-		// Check if this is 0.0.0.0/0
-		bits, size := cidr.Mask.Size()
-		if bits == 0 && size == 32 {
-			defaultSet = true
+		// Check if this is 0.0.0.0/0 or ::/0
+		if maskBits == 0 {
+			rules.defaultSet = true
 		}
 	}
 
-	if !defaultSet {
-		if allValuesMatch {
+	if !rules4.defaultSet {
+		if rules4.allValuesMatch {
 			_, zeroCIDR, _ := net.ParseCIDR("0.0.0.0/0")
-			tree.AddCIDR(zeroCIDR, !allValues)
+			tree.AddCIDR(zeroCIDR, !rules4.allValues)
 		} else {
 			return nil, fmt.Errorf("config `%s` contains both true and false rules, but no default set for 0.0.0.0/0", k)
 		}
 	}
 
+	if !rules6.defaultSet {
+		if rules6.allValuesMatch {
+			_, zeroCIDR, _ := net.ParseCIDR("::/0")
+			tree.AddCIDR(zeroCIDR, !rules6.allValues)
+		} else {
+			return nil, fmt.Errorf("config `%s` contains both true and false rules, but no default set for ::/0", k)
+		}
+	}
+
 	return &AllowList{cidrTree: tree, nameRules: nameRules}, nil
 }
 
@@ -478,7 +502,7 @@ func configLogger(c *Config) error {
 	if err != nil {
 		return fmt.Errorf("%s; possible levels: %s", err, logrus.AllLevels)
 	}
-	l.SetLevel(logLevel)
+	c.l.SetLevel(logLevel)
 
 	disableTimestamp := c.GetBool("logging.disable_timestamp", false)
 	timestampFormat := c.GetString("logging.timestamp_format", "")
@@ -490,13 +514,13 @@ func configLogger(c *Config) error {
 	logFormat := strings.ToLower(c.GetString("logging.format", "text"))
 	switch logFormat {
 	case "text":
-		l.Formatter = &logrus.TextFormatter{
+		c.l.Formatter = &logrus.TextFormatter{
 			TimestampFormat:  timestampFormat,
 			FullTimestamp:    fullTimestamp,
 			DisableTimestamp: disableTimestamp,
 		}
 	case "json":
-		l.Formatter = &logrus.JSONFormatter{
+		c.l.Formatter = &logrus.JSONFormatter{
 			TimestampFormat:  timestampFormat,
 			DisableTimestamp: disableTimestamp,
 		}

config_test.go

@@ -11,14 +11,15 @@ import (
 )
 
 func TestConfig_Load(t *testing.T) {
+	l := NewTestLogger()
 	dir, err := ioutil.TempDir("", "config-test")
 	// invalid yaml
-	c := NewConfig()
+	c := NewConfig(l)
 	ioutil.WriteFile(filepath.Join(dir, "01.yaml"), []byte(" invalid yaml"), 0644)
 	assert.EqualError(t, c.Load(dir), "yaml: unmarshal errors:\n  line 1: cannot unmarshal !!str `invalid...` into map[interface {}]interface {}")
 
 	// simple multi config merge
-	c = NewConfig()
+	c = NewConfig(l)
 	os.RemoveAll(dir)
 	os.Mkdir(dir, 0755)
 
@@ -40,8 +41,9 @@ func TestConfig_Load(t *testing.T) {
 }
 
 func TestConfig_Get(t *testing.T) {
+	l := NewTestLogger()
 	// test simple type
-	c := NewConfig()
+	c := NewConfig(l)
 	c.Settings["firewall"] = map[interface{}]interface{}{"outbound": "hi"}
 	assert.Equal(t, "hi", c.Get("firewall.outbound"))
 
@@ -55,13 +57,15 @@ func TestConfig_Get(t *testing.T) {
 }
 
 func TestConfig_GetStringSlice(t *testing.T) {
-	c := NewConfig()
+	l := NewTestLogger()
+	c := NewConfig(l)
 	c.Settings["slice"] = []interface{}{"one", "two"}
 	assert.Equal(t, []string{"one", "two"}, c.GetStringSlice("slice", []string{}))
 }
 
 func TestConfig_GetBool(t *testing.T) {
-	c := NewConfig()
+	l := NewTestLogger()
+	c := NewConfig(l)
 	c.Settings["bool"] = true
 	assert.Equal(t, true, c.GetBool("bool", false))
 
@@ -88,7 +92,8 @@ func TestConfig_GetBool(t *testing.T) {
 }
 
 func TestConfig_GetAllowList(t *testing.T) {
-	c := NewConfig()
+	l := NewTestLogger()
+	c := NewConfig(l)
 	c.Settings["allowlist"] = map[interface{}]interface{}{
 		"192.168.0.0": true,
 	}
@@ -109,6 +114,16 @@ func TestConfig_GetAllowList(t *testing.T) {
 	r, err = c.GetAllowList("allowlist", false)
 	assert.EqualError(t, err, "config `allowlist` contains both true and false rules, but no default set for 0.0.0.0/0")
 
+	c.Settings["allowlist"] = map[interface{}]interface{}{
+		"0.0.0.0/0":      true,
+		"10.0.0.0/8":     false,
+		"10.42.42.0/24":  true,
+		"fd00::/8":       true,
+		"fd00:fd00::/16": false,
+	}
+	r, err = c.GetAllowList("allowlist", false)
+	assert.EqualError(t, err, "config `allowlist` contains both true and false rules, but no default set for ::/0")
+
 	c.Settings["allowlist"] = map[interface{}]interface{}{
 		"0.0.0.0/0":     true,
 		"10.0.0.0/8":    false,
@@ -119,6 +134,19 @@ func TestConfig_GetAllowList(t *testing.T) {
 		assert.NotNil(t, r)
 	}
 
+	c.Settings["allowlist"] = map[interface{}]interface{}{
+		"0.0.0.0/0":      true,
+		"10.0.0.0/8":     false,
+		"10.42.42.0/24":  true,
+		"::/0":           false,
+		"fd00::/8":       true,
+		"fd00:fd00::/16": false,
+	}
+	r, err = c.GetAllowList("allowlist", false)
+	if assert.NoError(t, err) {
+		assert.NotNil(t, r)
+	}
+
 	// Test interface names
 
 	c.Settings["allowlist"] = map[interface{}]interface{}{
@@ -158,20 +186,21 @@ func TestConfig_GetAllowList(t *testing.T) {
 }
 
 func TestConfig_HasChanged(t *testing.T) {
+	l := NewTestLogger()
 	// No reload has occurred, return false
-	c := NewConfig()
+	c := NewConfig(l)
 	c.Settings["test"] = "hi"
 	assert.False(t, c.HasChanged(""))
 
 	// Test key change
-	c = NewConfig()
+	c = NewConfig(l)
 	c.Settings["test"] = "hi"
 	c.oldSettings = map[interface{}]interface{}{"test": "no"}
 	assert.True(t, c.HasChanged("test"))
 	assert.True(t, c.HasChanged(""))
 
 	// No key change
-	c = NewConfig()
+	c = NewConfig(l)
 	c.Settings["test"] = "hi"
 	c.oldSettings = map[interface{}]interface{}{"test": "hi"}
 	assert.False(t, c.HasChanged("test"))
@@ -179,12 +208,13 @@ func TestConfig_HasChanged(t *testing.T) {
 }
 
 func TestConfig_ReloadConfig(t *testing.T) {
+	l := NewTestLogger()
 	done := make(chan bool, 1)
 	dir, err := ioutil.TempDir("", "config-test")
 	assert.Nil(t, err)
 	ioutil.WriteFile(filepath.Join(dir, "01.yaml"), []byte("outer:\n  inner: hi"), 0644)
 
-	c := NewConfig()
+	c := NewConfig(l)
 	assert.Nil(t, c.Load(dir))
 
 	assert.False(t, c.HasChanged("outer.inner"))

connection_manager.go

@@ -28,10 +28,11 @@ type connectionManager struct {
 	checkInterval           int
 	pendingDeletionInterval int
 
+	l *logrus.Logger
 	// I wanted to call one matLock
 }
 
-func newConnectionManager(intf *Interface, checkInterval, pendingDeletionInterval int) *connectionManager {
+func newConnectionManager(l *logrus.Logger, intf *Interface, checkInterval, pendingDeletionInterval int) *connectionManager {
 	nc := &connectionManager{
 		hostMap:                 intf.hostMap,
 		in:                      make(map[uint32]struct{}),
@@ -47,6 +48,7 @@ func newConnectionManager(intf *Interface, checkInterval, pendingDeletionInterva
 		pendingDeletionTimer:    NewSystemTimerWheel(time.Millisecond*500, time.Second*60),
 		checkInterval:           checkInterval,
 		pendingDeletionInterval: pendingDeletionInterval,
+		l:                       l,
 	}
 	nc.Start()
 	return nc
@@ -141,14 +143,17 @@ func (n *connectionManager) Start() {
 
 func (n *connectionManager) Run() {
 	clockSource := time.Tick(500 * time.Millisecond)
+	p := []byte("")
+	nb := make([]byte, 12, 12)
+	out := make([]byte, mtu)
 
 	for now := range clockSource {
-		n.HandleMonitorTick(now)
+		n.HandleMonitorTick(now, p, nb, out)
 		n.HandleDeletionTick(now)
 	}
 }
 
-func (n *connectionManager) HandleMonitorTick(now time.Time) {
+func (n *connectionManager) HandleMonitorTick(now time.Time, p, nb, out []byte) {
 	n.TrafficTimer.advance(now)
 	for {
 		ep := n.TrafficTimer.Purge()
@@ -163,8 +168,8 @@ func (n *connectionManager) HandleMonitorTick(now time.Time) {
 
 		// If we saw incoming packets from this ip, just return
 		if traf {
-			if l.Level >= logrus.DebugLevel {
-				l.WithField("vpnIp", IntIp(vpnIP)).
+			if n.l.Level >= logrus.DebugLevel {
+				n.l.WithField("vpnIp", IntIp(vpnIP)).
 					WithField("tunnelCheck", m{"state": "alive", "method": "passive"}).
 					Debug("Tunnel status")
 			}
@@ -176,22 +181,22 @@ func (n *connectionManager) HandleMonitorTick(now time.Time) {
 		// If we didn't we may need to probe or destroy the conn
 		hostinfo, err := n.hostMap.QueryVpnIP(vpnIP)
 		if err != nil {
-			l.Debugf("Not found in hostmap: %s", IntIp(vpnIP))
+			n.l.Debugf("Not found in hostmap: %s", IntIp(vpnIP))
 			n.ClearIP(vpnIP)
 			n.ClearPendingDeletion(vpnIP)
 			continue
 		}
 
-		hostinfo.logger().
+		hostinfo.logger(n.l).
 			WithField("tunnelCheck", m{"state": "testing", "method": "active"}).
 			Debug("Tunnel status")
 
 		if hostinfo != nil && hostinfo.ConnectionState != nil {
 			// Send a test packet to trigger an authenticated tunnel test, this should suss out any lingering tunnel issues
-			n.intf.SendMessageToVpnIp(test, testRequest, vpnIP, []byte(""), make([]byte, 12, 12), make([]byte, mtu))
+			n.intf.SendMessageToVpnIp(test, testRequest, vpnIP, p, nb, out)
 
 		} else {
-			hostinfo.logger().Debugf("Hostinfo sadness: %s", IntIp(vpnIP))
+			hostinfo.logger(n.l).Debugf("Hostinfo sadness: %s", IntIp(vpnIP))
 		}
 		n.AddPendingDeletion(vpnIP)
 	}
@@ -211,7 +216,7 @@ func (n *connectionManager) HandleDeletionTick(now time.Time) {
 		// If we saw incoming packets from this ip, just return
 		traf := n.CheckIn(vpnIP)
 		if traf {
-			l.WithField("vpnIp", IntIp(vpnIP)).
+			n.l.WithField("vpnIp", IntIp(vpnIP)).
 				WithField("tunnelCheck", m{"state": "alive", "method": "active"}).
 				Debug("Tunnel status")
 			n.ClearIP(vpnIP)
@@ -223,7 +228,7 @@ func (n *connectionManager) HandleDeletionTick(now time.Time) {
 		if err != nil {
 			n.ClearIP(vpnIP)
 			n.ClearPendingDeletion(vpnIP)
-			l.Debugf("Not found in hostmap: %s", IntIp(vpnIP))
+			n.l.Debugf("Not found in hostmap: %s", IntIp(vpnIP))
 			continue
 		}
 
@@ -233,7 +238,7 @@ func (n *connectionManager) HandleDeletionTick(now time.Time) {
 			if hostinfo.ConnectionState != nil && hostinfo.ConnectionState.peerCert != nil {
 				cn = hostinfo.ConnectionState.peerCert.Details.Name
 			}
-			hostinfo.logger().
+			hostinfo.logger(n.l).
 				WithField("tunnelCheck", m{"state": "dead", "method": "active"}).
 				WithField("certName", cn).
 				Info("Tunnel status")
@@ -244,8 +249,7 @@ func (n *connectionManager) HandleDeletionTick(now time.Time) {
 			if n.intf.lightHouse != nil {
 				n.intf.lightHouse.DeleteVpnIP(vpnIP)
 			}
-			n.hostMap.DeleteVpnIP(vpnIP)
-			n.hostMap.DeleteIndex(hostinfo.localIndexId)
+			n.hostMap.DeleteHostInfo(hostinfo)
 		} else {
 			n.ClearIP(vpnIP)
 			n.ClearPendingDeletion(vpnIP)

connection_manager_test.go

@@ -13,6 +13,7 @@ import (
 var vpnIP uint32
 
 func Test_NewConnectionManagerTest(t *testing.T) {
+	l := NewTestLogger()
 	//_, tuncidr, _ := net.ParseCIDR("1.1.1.1/24")
 	_, vpncidr, _ := net.ParseCIDR("172.1.1.1/24")
 	_, localrange, _ := net.ParseCIDR("10.1.1.1/24")
@@ -20,7 +21,7 @@ func Test_NewConnectionManagerTest(t *testing.T) {
 	preferredRanges := []*net.IPNet{localrange}
 
 	// Very incomplete mock objects
-	hostMap := NewHostMap("test", vpncidr, preferredRanges)
+	hostMap := NewHostMap(l, "test", vpncidr, preferredRanges)
 	cs := &CertState{
 		rawCertificate:      []byte{},
 		privateKey:          []byte{},
@@ -28,7 +29,7 @@ func Test_NewConnectionManagerTest(t *testing.T) {
 		rawCertificateNoKey: []byte{},
 	}
 
-	lh := NewLightHouse(false, 0, []uint32{}, 1000, 0, &udpConn{}, false, 1, false)
+	lh := NewLightHouse(l, false, &net.IPNet{IP: net.IP{0, 0, 0, 0}, Mask: net.IPMask{0, 0, 0, 0}}, []uint32{}, 1000, 0, &udpConn{}, false, 1, false)
 	ifce := &Interface{
 		hostMap:          hostMap,
 		inside:           &Tun{},
@@ -36,19 +37,22 @@ func Test_NewConnectionManagerTest(t *testing.T) {
 		certState:        cs,
 		firewall:         &Firewall{},
 		lightHouse:       lh,
-		handshakeManager: NewHandshakeManager(vpncidr, preferredRanges, hostMap, lh, &udpConn{}, defaultHandshakeConfig),
+		handshakeManager: NewHandshakeManager(l, vpncidr, preferredRanges, hostMap, lh, &udpConn{}, defaultHandshakeConfig),
+		l:                l,
 	}
 	now := time.Now()
 
 	// Create manager
-	nc := newConnectionManager(ifce, 5, 10)
-	nc.HandleMonitorTick(now)
+	nc := newConnectionManager(l, ifce, 5, 10)
+	p := []byte("")
+	nb := make([]byte, 12, 12)
+	out := make([]byte, mtu)
+	nc.HandleMonitorTick(now, p, nb, out)
 	// Add an ip we have established a connection w/ to hostmap
 	hostinfo := nc.hostMap.AddVpnIP(vpnIP)
 	hostinfo.ConnectionState = &ConnectionState{
-		certState:      cs,
-		H:              &noise.HandshakeState{},
-		messageCounter: new(uint64),
+		certState: cs,
+		H:         &noise.HandshakeState{},
 	}
 
 	// We saw traffic out to vpnIP
@@ -57,18 +61,18 @@ func Test_NewConnectionManagerTest(t *testing.T) {
 	assert.Contains(t, nc.hostMap.Hosts, vpnIP)
 	// Move ahead 5s. Nothing should happen
 	next_tick := now.Add(5 * time.Second)
-	nc.HandleMonitorTick(next_tick)
+	nc.HandleMonitorTick(next_tick, p, nb, out)
 	nc.HandleDeletionTick(next_tick)
 	// Move ahead 6s. We haven't heard back
 	next_tick = now.Add(6 * time.Second)
-	nc.HandleMonitorTick(next_tick)
+	nc.HandleMonitorTick(next_tick, p, nb, out)
 	nc.HandleDeletionTick(next_tick)
 	// This host should now be up for deletion
 	assert.Contains(t, nc.pendingDeletion, vpnIP)
 	assert.Contains(t, nc.hostMap.Hosts, vpnIP)
 	// Move ahead some more
 	next_tick = now.Add(45 * time.Second)
-	nc.HandleMonitorTick(next_tick)
+	nc.HandleMonitorTick(next_tick, p, nb, out)
 	nc.HandleDeletionTick(next_tick)
 	// The host should be evicted
 	assert.NotContains(t, nc.pendingDeletion, vpnIP)
@@ -77,13 +81,14 @@ func Test_NewConnectionManagerTest(t *testing.T) {
 }
 
 func Test_NewConnectionManagerTest2(t *testing.T) {
+	l := NewTestLogger()
 	//_, tuncidr, _ := net.ParseCIDR("1.1.1.1/24")
 	_, vpncidr, _ := net.ParseCIDR("172.1.1.1/24")
 	_, localrange, _ := net.ParseCIDR("10.1.1.1/24")
 	preferredRanges := []*net.IPNet{localrange}
 
 	// Very incomplete mock objects
-	hostMap := NewHostMap("test", vpncidr, preferredRanges)
+	hostMap := NewHostMap(l, "test", vpncidr, preferredRanges)
 	cs := &CertState{
 		rawCertificate:      []byte{},
 		privateKey:          []byte{},
@@ -91,7 +96,7 @@ func Test_NewConnectionManagerTest2(t *testing.T) {
 		rawCertificateNoKey: []byte{},
 	}
 
-	lh := NewLightHouse(false, 0, []uint32{}, 1000, 0, &udpConn{}, false, 1, false)
+	lh := NewLightHouse(l, false, &net.IPNet{IP: net.IP{0, 0, 0, 0}, Mask: net.IPMask{0, 0, 0, 0}}, []uint32{}, 1000, 0, &udpConn{}, false, 1, false)
 	ifce := &Interface{
 		hostMap:          hostMap,
 		inside:           &Tun{},
@@ -99,19 +104,22 @@ func Test_NewConnectionManagerTest2(t *testing.T) {
 		certState:        cs,
 		firewall:         &Firewall{},
 		lightHouse:       lh,
-		handshakeManager: NewHandshakeManager(vpncidr, preferredRanges, hostMap, lh, &udpConn{}, defaultHandshakeConfig),
+		handshakeManager: NewHandshakeManager(l, vpncidr, preferredRanges, hostMap, lh, &udpConn{}, defaultHandshakeConfig),
+		l:                l,
 	}
 	now := time.Now()
 
 	// Create manager
-	nc := newConnectionManager(ifce, 5, 10)
-	nc.HandleMonitorTick(now)
+	nc := newConnectionManager(l, ifce, 5, 10)
+	p := []byte("")
+	nb := make([]byte, 12, 12)
+	out := make([]byte, mtu)
+	nc.HandleMonitorTick(now, p, nb, out)
 	// Add an ip we have established a connection w/ to hostmap
 	hostinfo := nc.hostMap.AddVpnIP(vpnIP)
 	hostinfo.ConnectionState = &ConnectionState{
-		certState:      cs,
-		H:              &noise.HandshakeState{},
-		messageCounter: new(uint64),
+		certState: cs,
+		H:         &noise.HandshakeState{},
 	}
 
 	// We saw traffic out to vpnIP
@@ -120,11 +128,11 @@ func Test_NewConnectionManagerTest2(t *testing.T) {
 	assert.Contains(t, nc.hostMap.Hosts, vpnIP)
 	// Move ahead 5s. Nothing should happen
 	next_tick := now.Add(5 * time.Second)
-	nc.HandleMonitorTick(next_tick)
+	nc.HandleMonitorTick(next_tick, p, nb, out)
 	nc.HandleDeletionTick(next_tick)
 	// Move ahead 6s. We haven't heard back
 	next_tick = now.Add(6 * time.Second)
-	nc.HandleMonitorTick(next_tick)
+	nc.HandleMonitorTick(next_tick, p, nb, out)
 	nc.HandleDeletionTick(next_tick)
 	// This host should now be up for deletion
 	assert.Contains(t, nc.pendingDeletion, vpnIP)
@@ -133,7 +141,7 @@ func Test_NewConnectionManagerTest2(t *testing.T) {
 	nc.In(vpnIP)
 	// Move ahead some more
 	next_tick = now.Add(45 * time.Second)
-	nc.HandleMonitorTick(next_tick)
+	nc.HandleMonitorTick(next_tick, p, nb, out)
 	nc.HandleDeletionTick(next_tick)
 	// The host should be evicted
 	assert.NotContains(t, nc.pendingDeletion, vpnIP)

connection_state.go

@@ -4,28 +4,30 @@ import (
 	"crypto/rand"
 	"encoding/json"
 	"sync"
+	"sync/atomic"
 
 	"github.com/flynn/noise"
+	"github.com/sirupsen/logrus"
 	"github.com/slackhq/nebula/cert"
 )
 
 const ReplayWindow = 1024
 
 type ConnectionState struct {
-	eKey           *NebulaCipherState
-	dKey           *NebulaCipherState
-	H              *noise.HandshakeState
-	certState      *CertState
-	peerCert       *cert.NebulaCertificate
-	initiator      bool
-	messageCounter *uint64
-	window         *Bits
-	queueLock      sync.Mutex
-	writeLock      sync.Mutex
-	ready          bool
+	eKey                 *NebulaCipherState
+	dKey                 *NebulaCipherState
+	H                    *noise.HandshakeState
+	certState            *CertState
+	peerCert             *cert.NebulaCertificate
+	initiator            bool
+	atomicMessageCounter uint64
+	window               *Bits
+	queueLock            sync.Mutex
+	writeLock            sync.Mutex
+	ready                bool
 }
 
-func (f *Interface) newConnectionState(initiator bool, pattern noise.HandshakePattern, psk []byte, pskStage int) *ConnectionState {
+func (f *Interface) newConnectionState(l *logrus.Logger, initiator bool, pattern noise.HandshakePattern, psk []byte, pskStage int) *ConnectionState {
 	cs := noise.NewCipherSuite(noise.DH25519, noise.CipherAESGCM, noise.HashSHA256)
 	if f.cipher == "chachapoly" {
 		cs = noise.NewCipherSuite(noise.DH25519, noise.CipherChaChaPoly, noise.HashSHA256)
@@ -36,7 +38,7 @@ func (f *Interface) newConnectionState(initiator bool, pattern noise.HandshakePa
 
 	b := NewBits(ReplayWindow)
 	// Clear out bit 0, we never transmit it and we don't want it showing as packet loss
-	b.Update(0)
+	b.Update(l, 0)
 
 	hs, err := noise.NewHandshakeState(noise.Config{
 		CipherSuite:           cs,
@@ -54,12 +56,11 @@ func (f *Interface) newConnectionState(initiator bool, pattern noise.HandshakePa
 	// The queue and ready params prevent a counter race that would happen when
 	// sending stored packets and simultaneously accepting new traffic.
 	ci := &ConnectionState{
-		H:              hs,
-		initiator:      initiator,
-		window:         b,
-		ready:          false,
-		certState:      curCertState,
-		messageCounter: new(uint64),
+		H:         hs,
+		initiator: initiator,
+		window:    b,
+		ready:     false,
+		certState: curCertState,
 	}
 
 	return ci
@@ -69,7 +70,7 @@ func (cs *ConnectionState) MarshalJSON() ([]byte, error) {
 	return json.Marshal(m{
 		"certificate":     cs.peerCert,
 		"initiator":       cs.initiator,
-		"message_counter": cs.messageCounter,
+		"message_counter": atomic.LoadUint64(&cs.atomicMessageCounter),
 		"ready":           cs.ready,
 	})
 }

control.go

@@ -1,55 +1,62 @@
 package nebula
 
 import (
-	"encoding/binary"
-	"fmt"
 	"net"
 	"os"
 	"os/signal"
+	"sync/atomic"
 	"syscall"
 
 	"github.com/sirupsen/logrus"
 	"github.com/slackhq/nebula/cert"
-	"golang.org/x/net/ipv4"
 )
 
 // Every interaction here needs to take extra care to copy memory and not return or use arguments "as is" when touching
 // core. This means copying IP objects, slices, de-referencing pointers and taking the actual value, etc
 
 type Control struct {
-	f *Interface
-	l *logrus.Logger
+	f          *Interface
+	l          *logrus.Logger
+	sshStart   func()
+	statsStart func()
+	dnsStart   func()
 }
 
 type ControlHostInfo struct {
 	VpnIP          net.IP                  `json:"vpnIp"`
 	LocalIndex     uint32                  `json:"localIndex"`
 	RemoteIndex    uint32                  `json:"remoteIndex"`
-	RemoteAddrs    []udpAddr               `json:"remoteAddrs"`
+	RemoteAddrs    []*udpAddr              `json:"remoteAddrs"`
 	CachedPackets  int                     `json:"cachedPackets"`
 	Cert           *cert.NebulaCertificate `json:"cert"`
 	MessageCounter uint64                  `json:"messageCounter"`
-	CurrentRemote  udpAddr                 `json:"currentRemote"`
+	CurrentRemote  *udpAddr                `json:"currentRemote"`
 }
 
 // Start actually runs nebula, this is a nonblocking call. To block use Control.ShutdownBlock()
 func (c *Control) Start() {
+	// Activate the interface
+	c.f.activate()
+
+	// Call all the delayed funcs that waited patiently for the interface to be created.
+	if c.sshStart != nil {
+		go c.sshStart()
+	}
+	if c.statsStart != nil {
+		go c.statsStart()
+	}
+	if c.dnsStart != nil {
+		go c.dnsStart()
+	}
+
+	// Start reading packets.
 	c.f.run()
 }
 
 // Stop signals nebula to shutdown, returns after the shutdown is complete
 func (c *Control) Stop() {
 	//TODO: stop tun and udp routines, the lock on hostMap effectively does that though
-	//TODO: this is probably better as a function in ConnectionManager or HostMap directly
-	c.f.hostMap.Lock()
-	for _, h := range c.f.hostMap.Hosts {
-		if h.ConnectionState.ready {
-			c.f.send(closeTunnel, 0, h.ConnectionState, h, h.remote, []byte{}, make([]byte, 12, 12), make([]byte, mtu))
-			c.l.WithField("vpnIp", IntIp(h.hostId)).WithField("udpAddr", h.remote).
-				Debug("Sending close tunnel message")
-		}
-	}
-	c.f.hostMap.Unlock()
+	c.CloseAllTunnels(false)
 	c.l.Info("Goodbye")
 }
 
@@ -68,27 +75,21 @@ func (c *Control) ShutdownBlock() {
 // RebindUDPServer asks the UDP listener to rebind it's listener. Mainly used on mobile clients when interfaces change
 func (c *Control) RebindUDPServer() {
 	_ = c.f.outside.Rebind()
+
+	// Trigger a lighthouse update, useful for mobile clients that should have an update interval of 0
+	c.f.lightHouse.SendUpdate(c.f)
+
+	// Let the main interface know that we rebound so that underlying tunnels know to trigger punches from their remotes
+	c.f.rebindCount++
 }
 
 // ListHostmap returns details about the actual or pending (handshaking) hostmap
 func (c *Control) ListHostmap(pendingMap bool) []ControlHostInfo {
-	var hm *HostMap
 	if pendingMap {
-		hm = c.f.handshakeManager.pendingHostMap
+		return listHostMap(c.f.handshakeManager.pendingHostMap)
 	} else {
-		hm = c.f.hostMap
+		return listHostMap(c.f.hostMap)
 	}
-
-	hm.RLock()
-	hosts := make([]ControlHostInfo, len(hm.Hosts))
-	i := 0
-	for _, v := range hm.Hosts {
-		hosts[i] = copyHostInfo(v)
-		i++
-	}
-	hm.RUnlock()
-
-	return hosts
 }
 
 // GetHostInfoByVpnIP returns a single tunnels hostInfo, or nil if not found
@@ -105,7 +106,7 @@ func (c *Control) GetHostInfoByVpnIP(vpnIP uint32, pending bool) *ControlHostInf
 		return nil
 	}
 
-	ch := copyHostInfo(h)
+	ch := copyHostInfo(h, c.f.hostMap.preferredRanges)
 	return &ch
 }
 
@@ -117,7 +118,7 @@ func (c *Control) SetRemoteForTunnel(vpnIP uint32, addr udpAddr) *ControlHostInf
 	}
 
 	hostInfo.SetRemote(addr.Copy())
-	ch := copyHostInfo(hostInfo)
+	ch := copyHostInfo(hostInfo, c.f.hostMap.preferredRanges)
 	return &ch
 }
 
@@ -141,19 +142,46 @@ func (c *Control) CloseTunnel(vpnIP uint32, localOnly bool) bool {
 		)
 	}
 
-	c.f.closeTunnel(hostInfo)
+	c.f.closeTunnel(hostInfo, false)
 	return true
 }
 
-func copyHostInfo(h *HostInfo) ControlHostInfo {
-	addrs := h.RemoteUDPAddrs()
+// CloseAllTunnels is just like CloseTunnel except it goes through and shuts them all down, optionally you can avoid shutting down lighthouse tunnels
+// the int returned is a count of tunnels closed
+func (c *Control) CloseAllTunnels(excludeLighthouses bool) (closed int) {
+	//TODO: this is probably better as a function in ConnectionManager or HostMap directly
+	c.f.hostMap.Lock()
+	for _, h := range c.f.hostMap.Hosts {
+		if excludeLighthouses {
+			if _, ok := c.f.lightHouse.lighthouses[h.hostId]; ok {
+				continue
+			}
+		}
+
+		if h.ConnectionState.ready {
+			c.f.send(closeTunnel, 0, h.ConnectionState, h, h.remote, []byte{}, make([]byte, 12, 12), make([]byte, mtu))
+			c.f.closeTunnel(h, true)
+
+			c.l.WithField("vpnIp", IntIp(h.hostId)).WithField("udpAddr", h.remote).
+				Debug("Sending close tunnel message")
+			closed++
+		}
+	}
+	c.f.hostMap.Unlock()
+	return
+}
+
+func copyHostInfo(h *HostInfo, preferredRanges []*net.IPNet) ControlHostInfo {
 	chi := ControlHostInfo{
-		VpnIP:          int2ip(h.hostId),
-		LocalIndex:     h.localIndexId,
-		RemoteIndex:    h.remoteIndexId,
-		RemoteAddrs:    make([]udpAddr, len(addrs), len(addrs)),
-		CachedPackets:  len(h.packetStore),
-		MessageCounter: *h.ConnectionState.messageCounter,
+		VpnIP:         int2ip(h.hostId),
+		LocalIndex:    h.localIndexId,
+		RemoteIndex:   h.remoteIndexId,
+		RemoteAddrs:   h.remotes.CopyAddrs(preferredRanges),
+		CachedPackets: len(h.packetStore),
+	}
+
+	if h.ConnectionState != nil {
+		chi.MessageCounter = atomic.LoadUint64(&h.ConnectionState.atomicMessageCounter)
 	}
 
 	if c := h.GetCert(); c != nil {
@@ -161,56 +189,21 @@ func copyHostInfo(h *HostInfo) ControlHostInfo {
 	}
 
 	if h.remote != nil {
-		chi.CurrentRemote = *h.remote
-	}
-
-	for i, addr := range addrs {
-		chi.RemoteAddrs[i] = addr.Copy()
+		chi.CurrentRemote = h.remote.Copy()
 	}
 
 	return chi
 }
 
-// Hook provides the ability to hook into the network path for a particular
-// message sub type. Any received message of that subtype that is allowed by
-// the firewall will be written to the provided write func instead of the
-// inside interface.
-// TODO: make this an io.Writer
-func (c *Control) Hook(t NebulaMessageSubType, w func([]byte) error) error {
-	if t == 0 {
-		return fmt.Errorf("non-default message subtype must be specified")
-	}
-	if _, ok := c.f.handlers[Version][message][t]; ok {
-		return fmt.Errorf("message subtype %d already hooked", t)
+func listHostMap(hm *HostMap) []ControlHostInfo {
+	hm.RLock()
+	hosts := make([]ControlHostInfo, len(hm.Hosts))
+	i := 0
+	for _, v := range hm.Hosts {
+		hosts[i] = copyHostInfo(v, hm.preferredRanges)
+		i++
 	}
+	hm.RUnlock()
 
-	c.f.handlers[Version][message][t] = c.f.newHook(w)
-	return nil
-}
-
-// Send provides the ability to send arbitrary message packets to peer nodes.
-// The provided payload will be encapsulated in a Nebula Firewall packet
-// (IPv4 plus ports) from the node IP to the provided destination nebula IP.
-// Any protocol handling above layer 3 (IP) must be managed by the caller.
-func (c *Control) Send(ip uint32, port uint16, st NebulaMessageSubType, payload []byte) {
-	headerLen := ipv4.HeaderLen + minFwPacketLen
-	length := headerLen + len(payload)
-	packet := make([]byte, length)
-	packet[0] = 0x45 // IPv4 HL=20
-	packet[9] = 114  // Declare as arbitrary 0-hop protocol
-	binary.BigEndian.PutUint16(packet[2:4], uint16(length))
-	binary.BigEndian.PutUint32(packet[12:16], ip2int(c.f.inside.CidrNet().IP.To4()))
-	binary.BigEndian.PutUint32(packet[16:20], ip)
-
-	// Set identical values for src and dst port as they're only
-	// used for nebula firewall rule/conntrack matching.
-	binary.BigEndian.PutUint16(packet[20:22], port)
-	binary.BigEndian.PutUint16(packet[22:24], port)
-
-	copy(packet[headerLen:], payload)
-
-	fp := &FirewallPacket{}
-	nb := make([]byte, 12)
-	out := make([]byte, mtu)
-	c.f.consumeInsidePacket(st, packet, fp, nb, out)
+	return hosts
 }

control_test.go

@@ -13,18 +13,19 @@ import (
 )
 
 func TestControl_GetHostInfoByVpnIP(t *testing.T) {
+	l := NewTestLogger()
 	// Special care must be taken to re-use all objects provided to the hostmap and certificate in the expectedInfo object
 	// To properly ensure we are not exposing core memory to the caller
-	hm := NewHostMap("test", &net.IPNet{}, make([]*net.IPNet, 0))
-	remote1 := NewUDPAddr(100, 4444)
-	remote2 := NewUDPAddr(101, 4444)
+	hm := NewHostMap(l, "test", &net.IPNet{}, make([]*net.IPNet, 0))
+	remote1 := NewUDPAddr(int2ip(100), 4444)
+	remote2 := NewUDPAddr(net.ParseIP("1:2:3:4:5:6:7:8"), 4444)
 	ipNet := net.IPNet{
 		IP:   net.IPv4(1, 2, 3, 4),
 		Mask: net.IPMask{255, 255, 255, 0},
 	}
 
 	ipNet2 := net.IPNet{
-		IP:   net.IPv4(1, 2, 3, 5),
+		IP:   net.ParseIP("1:2:3:4:5:6:7:8"),
 		Mask: net.IPMask{255, 255, 255, 0},
 	}
 
@@ -43,15 +44,15 @@ func TestControl_GetHostInfoByVpnIP(t *testing.T) {
 		},
 		Signature: []byte{1, 2, 1, 2, 1, 3},
 	}
-	counter := uint64(0)
 
-	remotes := []*HostInfoDest{NewHostInfoDest(remote1), NewHostInfoDest(remote2)}
+	remotes := NewRemoteList()
+	remotes.unlockedPrependV4(0, NewIp4AndPort(remote1.IP, uint32(remote1.Port)))
+	remotes.unlockedPrependV6(0, NewIp6AndPort(remote2.IP, uint32(remote2.Port)))
 	hm.Add(ip2int(ipNet.IP), &HostInfo{
 		remote:  remote1,
-		Remotes: remotes,
+		remotes: remotes,
 		ConnectionState: &ConnectionState{
-			peerCert:       crt,
-			messageCounter: &counter,
+			peerCert: crt,
 		},
 		remoteIndexId: 200,
 		localIndexId:  201,
@@ -60,10 +61,9 @@ func TestControl_GetHostInfoByVpnIP(t *testing.T) {
 
 	hm.Add(ip2int(ipNet2.IP), &HostInfo{
 		remote:  remote1,
-		Remotes: remotes,
+		remotes: remotes,
 		ConnectionState: &ConnectionState{
-			peerCert:       nil,
-			messageCounter: &counter,
+			peerCert: nil,
 		},
 		remoteIndexId: 200,
 		localIndexId:  201,
@@ -83,11 +83,11 @@ func TestControl_GetHostInfoByVpnIP(t *testing.T) {
 		VpnIP:          net.IPv4(1, 2, 3, 4).To4(),
 		LocalIndex:     201,
 		RemoteIndex:    200,
-		RemoteAddrs:    []udpAddr{*remote1, *remote2},
+		RemoteAddrs:    []*udpAddr{remote2, remote1},
 		CachedPackets:  0,
 		Cert:           crt.Copy(),
 		MessageCounter: 0,
-		CurrentRemote:  *NewUDPAddr(100, 4444),
+		CurrentRemote:  NewUDPAddr(int2ip(100), 4444),
 	}
 
 	// Make sure we don't have any unexpected fields

control_tester.go

@@ -0,0 +1,128 @@
+// +build e2e_testing
+
+package nebula
+
+import (
+	"net"
+
+	"github.com/google/gopacket"
+	"github.com/google/gopacket/layers"
+)
+
+// WaitForTypeByIndex will pipe all messages from this control device into the pipeTo control device
+// returning after a message matching the criteria has been piped
+func (c *Control) WaitForType(msgType NebulaMessageType, subType NebulaMessageSubType, pipeTo *Control) {
+	h := &Header{}
+	for {
+		p := c.f.outside.Get(true)
+		if err := h.Parse(p.Data); err != nil {
+			panic(err)
+		}
+		pipeTo.InjectUDPPacket(p)
+		if h.Type == msgType && h.Subtype == subType {
+			return
+		}
+	}
+}
+
+// WaitForTypeByIndex is similar to WaitForType except it adds an index check
+// Useful if you have many nodes communicating and want to wait to find a specific nodes packet
+func (c *Control) WaitForTypeByIndex(toIndex uint32, msgType NebulaMessageType, subType NebulaMessageSubType, pipeTo *Control) {
+	h := &Header{}
+	for {
+		p := c.f.outside.Get(true)
+		if err := h.Parse(p.Data); err != nil {
+			panic(err)
+		}
+		pipeTo.InjectUDPPacket(p)
+		if h.RemoteIndex == toIndex && h.Type == msgType && h.Subtype == subType {
+			return
+		}
+	}
+}
+
+// InjectLightHouseAddr will push toAddr into the local lighthouse cache for the vpnIp
+// This is necessary if you did not configure static hosts or are not running a lighthouse
+func (c *Control) InjectLightHouseAddr(vpnIp net.IP, toAddr *net.UDPAddr) {
+	c.f.lightHouse.Lock()
+	remoteList := c.f.lightHouse.unlockedGetRemoteList(ip2int(vpnIp))
+	remoteList.Lock()
+	defer remoteList.Unlock()
+	c.f.lightHouse.Unlock()
+
+	iVpnIp := ip2int(vpnIp)
+	if v4 := toAddr.IP.To4(); v4 != nil {
+		remoteList.unlockedPrependV4(iVpnIp, NewIp4AndPort(v4, uint32(toAddr.Port)))
+	} else {
+		remoteList.unlockedPrependV6(iVpnIp, NewIp6AndPort(toAddr.IP, uint32(toAddr.Port)))
+	}
+}
+
+// GetFromTun will pull a packet off the tun side of nebula
+func (c *Control) GetFromTun(block bool) []byte {
+	return c.f.inside.(*Tun).Get(block)
+}
+
+// GetFromUDP will pull a udp packet off the udp side of nebula
+func (c *Control) GetFromUDP(block bool) *UdpPacket {
+	return c.f.outside.Get(block)
+}
+
+func (c *Control) GetUDPTxChan() <-chan *UdpPacket {
+	return c.f.outside.txPackets
+}
+
+func (c *Control) GetTunTxChan() <-chan []byte {
+	return c.f.inside.(*Tun).txPackets
+}
+
+// InjectUDPPacket will inject a packet into the udp side of nebula
+func (c *Control) InjectUDPPacket(p *UdpPacket) {
+	c.f.outside.Send(p)
+}
+
+// InjectTunUDPPacket puts a udp packet on the tun interface. Using UDP here because it's a simpler protocol
+func (c *Control) InjectTunUDPPacket(toIp net.IP, toPort uint16, fromPort uint16, data []byte) {
+	ip := layers.IPv4{
+		Version:  4,
+		TTL:      64,
+		Protocol: layers.IPProtocolUDP,
+		SrcIP:    c.f.inside.CidrNet().IP,
+		DstIP:    toIp,
+	}
+
+	udp := layers.UDP{
+		SrcPort: layers.UDPPort(fromPort),
+		DstPort: layers.UDPPort(toPort),
+	}
+	err := udp.SetNetworkLayerForChecksum(&ip)
+	if err != nil {
+		panic(err)
+	}
+
+	buffer := gopacket.NewSerializeBuffer()
+	opt := gopacket.SerializeOptions{
+		ComputeChecksums: true,
+		FixLengths:       true,
+	}
+	err = gopacket.SerializeLayers(buffer, opt, &ip, &udp, gopacket.Payload(data))
+	if err != nil {
+		panic(err)
+	}
+
+	c.f.inside.(*Tun).Send(buffer.Bytes())
+}
+
+func (c *Control) GetUDPAddr() string {
+	return c.f.outside.addr.String()
+}
+
+func (c *Control) KillPendingTunnel(vpnIp net.IP) bool {
+	hostinfo, ok := c.f.handshakeManager.pendingHostMap.Hosts[ip2int(vpnIp)]
+	if !ok {
+		return false
+	}
+
+	c.f.handshakeManager.pendingHostMap.DeleteHostInfo(hostinfo)
+	return true
+}

dist/arch/nebula.service

@@ -5,8 +5,6 @@ After=basic.target network.target network-online.target
 
 [Service]
 SyslogIdentifier=nebula
-StandardOutput=syslog
-StandardError=syslog
 ExecReload=/bin/kill -HUP $MAINPID
 ExecStart=/usr/bin/nebula -config /etc/nebula/config.yml
 Restart=always

dist/fedora/nebula.service

@@ -0,0 +1,15 @@
+[Unit]
+Description=Nebula overlay networking tool
+
+After=basic.target network.target network-online.target
+Before=sshd.service
+Wants=basic.target network-online.target
+
+[Service]
+ExecReload=/bin/kill -HUP $MAINPID
+ExecStart=/usr/bin/nebula -config /etc/nebula/config.yml
+Restart=always
+SyslogIdentifier=nebula
+
+[Install]
+WantedBy=multi-user.target

dns_server.go

@@ -7,6 +7,7 @@ import (
 	"sync"
 
 	"github.com/miekg/dns"
+	"github.com/sirupsen/logrus"
 )
 
 // This whole thing should be rewritten to use context
@@ -63,7 +64,7 @@ func (d *dnsRecords) Add(host, data string) {
 	d.Unlock()
 }
 
-func parseQuery(m *dns.Msg, w dns.ResponseWriter) {
+func parseQuery(l *logrus.Logger, m *dns.Msg, w dns.ResponseWriter) {
 	for _, q := range m.Question {
 		switch q.Qtype {
 		case dns.TypeA:
@@ -95,37 +96,44 @@ func parseQuery(m *dns.Msg, w dns.ResponseWriter) {
 	}
 }
 
-func handleDnsRequest(w dns.ResponseWriter, r *dns.Msg) {
+func handleDnsRequest(l *logrus.Logger, w dns.ResponseWriter, r *dns.Msg) {
 	m := new(dns.Msg)
 	m.SetReply(r)
 	m.Compress = false
 
 	switch r.Opcode {
 	case dns.OpcodeQuery:
-		parseQuery(m, w)
+		parseQuery(l, m, w)
 	}
 
 	w.WriteMsg(m)
 }
 
-func dnsMain(hostMap *HostMap, c *Config) {
+func dnsMain(l *logrus.Logger, hostMap *HostMap, c *Config) func() {
 	dnsR = newDnsRecords(hostMap)
 
 	// attach request handler func
-	dns.HandleFunc(".", handleDnsRequest)
+	dns.HandleFunc(".", func(w dns.ResponseWriter, r *dns.Msg) {
+		handleDnsRequest(l, w, r)
+	})
 
-	c.RegisterReloadCallback(reloadDns)
-	startDns(c)
+	c.RegisterReloadCallback(func(c *Config) {
+		reloadDns(l, c)
+	})
+
+	return func() {
+		startDns(l, c)
+	}
 }
 
 func getDnsServerAddr(c *Config) string {
 	return c.GetString("lighthouse.dns.host", "") + ":" + strconv.Itoa(c.GetInt("lighthouse.dns.port", 53))
 }
 
-func startDns(c *Config) {
+func startDns(l *logrus.Logger, c *Config) {
 	dnsAddr = getDnsServerAddr(c)
 	dnsServer = &dns.Server{Addr: dnsAddr, Net: "udp"}
-	l.Debugf("Starting DNS responder at %s\n", dnsAddr)
+	l.WithField("dnsListener", dnsAddr).Infof("Starting DNS responder")
 	err := dnsServer.ListenAndServe()
 	defer dnsServer.Shutdown()
 	if err != nil {
@@ -133,7 +141,7 @@ func startDns(c *Config) {
 	}
 }
 
-func reloadDns(c *Config) {
+func reloadDns(l *logrus.Logger, c *Config) {
 	if dnsAddr == getDnsServerAddr(c) {
 		l.Debug("No DNS server config change detected")
 		return
@@ -141,5 +149,5 @@ func reloadDns(c *Config) {
 
 	l.Debug("Restarting DNS server")
 	dnsServer.Shutdown()
-	go startDns(c)
+	go startDns(l, c)
 }

e2e/doc.go

@@ -0,0 +1,3 @@
+package e2e
+
+// This file exists to allow `go fmt` to traverse here on its own. The build tags were keeping it out before

e2e/handshakes_test.go

@@ -0,0 +1,181 @@
+// +build e2e_testing
+
+package e2e
+
+import (
+	"net"
+	"testing"
+	"time"
+
+	"github.com/slackhq/nebula"
+	"github.com/slackhq/nebula/e2e/router"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestGoodHandshake(t *testing.T) {
+	ca, _, caKey, _ := newTestCaCert(time.Now(), time.Now().Add(10*time.Minute), []*net.IPNet{}, []*net.IPNet{}, []string{})
+	myControl, myVpnIp, myUdpAddr := newSimpleServer(ca, caKey, "me", net.IP{10, 0, 0, 1})
+	theirControl, theirVpnIp, theirUdpAddr := newSimpleServer(ca, caKey, "them", net.IP{10, 0, 0, 2})
+
+	// Put their info in our lighthouse
+	myControl.InjectLightHouseAddr(theirVpnIp, theirUdpAddr)
+
+	// Start the servers
+	myControl.Start()
+	theirControl.Start()
+
+	t.Log("Send a udp packet through to begin standing up the tunnel, this should come out the other side")
+	myControl.InjectTunUDPPacket(theirVpnIp, 80, 80, []byte("Hi from me"))
+
+	t.Log("Have them consume my stage 0 packet. They have a tunnel now")
+	theirControl.InjectUDPPacket(myControl.GetFromUDP(true))
+
+	t.Log("Get their stage 1 packet so that we can play with it")
+	stage1Packet := theirControl.GetFromUDP(true)
+
+	t.Log("I consume a garbage packet with a proper nebula header for our tunnel")
+	// this should log a statement and get ignored, allowing the real handshake packet to complete the tunnel
+	badPacket := stage1Packet.Copy()
+	badPacket.Data = badPacket.Data[:len(badPacket.Data)-nebula.HeaderLen]
+	myControl.InjectUDPPacket(badPacket)
+
+	t.Log("Have me consume their real stage 1 packet. I have a tunnel now")
+	myControl.InjectUDPPacket(stage1Packet)
+
+	t.Log("Wait until we see my cached packet come through")
+	myControl.WaitForType(1, 0, theirControl)
+
+	t.Log("Make sure our host infos are correct")
+	assertHostInfoPair(t, myUdpAddr, theirUdpAddr, myVpnIp, theirVpnIp, myControl, theirControl)
+
+	t.Log("Get that cached packet and make sure it looks right")
+	myCachedPacket := theirControl.GetFromTun(true)
+	assertUdpPacket(t, []byte("Hi from me"), myCachedPacket, myVpnIp, theirVpnIp, 80, 80)
+
+	t.Log("Do a bidirectional tunnel test")
+	assertTunnel(t, myVpnIp, theirVpnIp, myControl, theirControl, router.NewR(myControl, theirControl))
+
+	myControl.Stop()
+	theirControl.Stop()
+	//TODO: assert hostmaps
+}
+
+func TestWrongResponderHandshake(t *testing.T) {
+	ca, _, caKey, _ := newTestCaCert(time.Now(), time.Now().Add(10*time.Minute), []*net.IPNet{}, []*net.IPNet{}, []string{})
+
+	// The IPs here are chosen on purpose:
+	// The current remote handling will sort by preference, public, and then lexically.
+	// So we need them to have a higher address than evil (we could apply a preference though)
+	myControl, myVpnIp, myUdpAddr := newSimpleServer(ca, caKey, "me", net.IP{10, 0, 0, 100})
+	theirControl, theirVpnIp, theirUdpAddr := newSimpleServer(ca, caKey, "them", net.IP{10, 0, 0, 99})
+	evilControl, evilVpnIp, evilUdpAddr := newSimpleServer(ca, caKey, "evil", net.IP{10, 0, 0, 2})
+
+	// Add their real udp addr, which should be tried after evil.
+	myControl.InjectLightHouseAddr(theirVpnIp, theirUdpAddr)
+
+	// Put the evil udp addr in for their vpn Ip, this is a case of being lied to by the lighthouse.
+	myControl.InjectLightHouseAddr(theirVpnIp, evilUdpAddr)
+
+	// Build a router so we don't have to reason who gets which packet
+	r := router.NewR(myControl, theirControl, evilControl)
+
+	// Start the servers
+	myControl.Start()
+	theirControl.Start()
+	evilControl.Start()
+
+	t.Log("Start the handshake process, we will route until we see our cached packet get sent to them")
+	myControl.InjectTunUDPPacket(theirVpnIp, 80, 80, []byte("Hi from me"))
+	r.RouteForAllExitFunc(func(p *nebula.UdpPacket, c *nebula.Control) router.ExitType {
+		h := &nebula.Header{}
+		err := h.Parse(p.Data)
+		if err != nil {
+			panic(err)
+		}
+
+		if p.ToIp.Equal(theirUdpAddr.IP) && p.ToPort == uint16(theirUdpAddr.Port) && h.Type == 1 {
+			return router.RouteAndExit
+		}
+
+		return router.KeepRouting
+	})
+
+	//TODO: Assert pending hostmap - I should have a correct hostinfo for them now
+
+	t.Log("My cached packet should be received by them")
+	myCachedPacket := theirControl.GetFromTun(true)
+	assertUdpPacket(t, []byte("Hi from me"), myCachedPacket, myVpnIp, theirVpnIp, 80, 80)
+
+	t.Log("Test the tunnel with them")
+	assertHostInfoPair(t, myUdpAddr, theirUdpAddr, myVpnIp, theirVpnIp, myControl, theirControl)
+	assertTunnel(t, myVpnIp, theirVpnIp, myControl, theirControl, r)
+
+	t.Log("Flush all packets from all controllers")
+	r.FlushAll()
+
+	t.Log("Ensure ensure I don't have any hostinfo artifacts from evil")
+	assert.Nil(t, myControl.GetHostInfoByVpnIP(ip2int(evilVpnIp), true), "My pending hostmap should not contain evil")
+	assert.Nil(t, myControl.GetHostInfoByVpnIP(ip2int(evilVpnIp), false), "My main hostmap should not contain evil")
+	//NOTE: if evil lost the handshake race it may still have a tunnel since me would reject the handshake since the tunnel is complete
+
+	//TODO: assert hostmaps for everyone
+	t.Log("Success!")
+	myControl.Stop()
+	theirControl.Stop()
+}
+
+func Test_Case1_Stage1Race(t *testing.T) {
+	ca, _, caKey, _ := newTestCaCert(time.Now(), time.Now().Add(10*time.Minute), []*net.IPNet{}, []*net.IPNet{}, []string{})
+	myControl, myVpnIp, myUdpAddr := newSimpleServer(ca, caKey, "me  ", net.IP{10, 0, 0, 1})
+	theirControl, theirVpnIp, theirUdpAddr := newSimpleServer(ca, caKey, "them", net.IP{10, 0, 0, 2})
+
+	// Put their info in our lighthouse and vice versa
+	myControl.InjectLightHouseAddr(theirVpnIp, theirUdpAddr)
+	theirControl.InjectLightHouseAddr(myVpnIp, myUdpAddr)
+
+	// Build a router so we don't have to reason who gets which packet
+	r := router.NewR(myControl, theirControl)
+
+	// Start the servers
+	myControl.Start()
+	theirControl.Start()
+
+	t.Log("Trigger a handshake to start on both me and them")
+	myControl.InjectTunUDPPacket(theirVpnIp, 80, 80, []byte("Hi from me"))
+	theirControl.InjectTunUDPPacket(myVpnIp, 80, 80, []byte("Hi from them"))
+
+	t.Log("Get both stage 1 handshake packets")
+	myHsForThem := myControl.GetFromUDP(true)
+	theirHsForMe := theirControl.GetFromUDP(true)
+
+	t.Log("Now inject both stage 1 handshake packets")
+	myControl.InjectUDPPacket(theirHsForMe)
+	theirControl.InjectUDPPacket(myHsForThem)
+	//TODO: they should win, grab their index for me and make sure I use it in the end.
+
+	t.Log("They should not have a stage 2 (won the race) but I should send one")
+	theirControl.InjectUDPPacket(myControl.GetFromUDP(true))
+
+	t.Log("Route for me until I send a message packet to them")
+	myControl.WaitForType(1, 0, theirControl)
+
+	t.Log("My cached packet should be received by them")
+	myCachedPacket := theirControl.GetFromTun(true)
+	assertUdpPacket(t, []byte("Hi from me"), myCachedPacket, myVpnIp, theirVpnIp, 80, 80)
+
+	t.Log("Route for them until I send a message packet to me")
+	theirControl.WaitForType(1, 0, myControl)
+
+	t.Log("Their cached packet should be received by me")
+	theirCachedPacket := myControl.GetFromTun(true)
+	assertUdpPacket(t, []byte("Hi from them"), theirCachedPacket, theirVpnIp, myVpnIp, 80, 80)
+
+	t.Log("Do a bidirectional tunnel test")
+	assertTunnel(t, myVpnIp, theirVpnIp, myControl, theirControl, r)
+
+	myControl.Stop()
+	theirControl.Stop()
+	//TODO: assert hostmaps
+}
+
+//TODO: add a test with many lies

e2e/helpers_test.go

@@ -0,0 +1,317 @@
+// +build e2e_testing
+
+package e2e
+
+import (
+	"crypto/rand"
+	"encoding/binary"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net"
+	"os"
+	"testing"
+	"time"
+
+	"github.com/google/gopacket"
+	"github.com/google/gopacket/layers"
+	"github.com/sirupsen/logrus"
+	"github.com/slackhq/nebula"
+	"github.com/slackhq/nebula/cert"
+	"github.com/slackhq/nebula/e2e/router"
+	"github.com/stretchr/testify/assert"
+	"golang.org/x/crypto/curve25519"
+	"golang.org/x/crypto/ed25519"
+	"gopkg.in/yaml.v2"
+)
+
+type m map[string]interface{}
+
+// newSimpleServer creates a nebula instance with many assumptions
+func newSimpleServer(caCrt *cert.NebulaCertificate, caKey []byte, name string, udpIp net.IP) (*nebula.Control, net.IP, *net.UDPAddr) {
+	l := NewTestLogger()
+
+	vpnIpNet := &net.IPNet{IP: make([]byte, len(udpIp)), Mask: net.IPMask{255, 255, 255, 0}}
+	copy(vpnIpNet.IP, udpIp)
+	vpnIpNet.IP[1] += 128
+	udpAddr := net.UDPAddr{
+		IP:   udpIp,
+		Port: 4242,
+	}
+	_, _, myPrivKey, myPEM := newTestCert(caCrt, caKey, name, time.Now(), time.Now().Add(5*time.Minute), vpnIpNet, nil, []string{})
+
+	caB, err := caCrt.MarshalToPEM()
+	if err != nil {
+		panic(err)
+	}
+
+	mc := m{
+		"pki": m{
+			"ca":   string(caB),
+			"cert": string(myPEM),
+			"key":  string(myPrivKey),
+		},
+		//"tun": m{"disabled": true},
+		"firewall": m{
+			"outbound": []m{{
+				"proto": "any",
+				"port":  "any",
+				"host":  "any",
+			}},
+			"inbound": []m{{
+				"proto": "any",
+				"port":  "any",
+				"host":  "any",
+			}},
+		},
+		//"handshakes": m{
+		//	"try_interval": "1s",
+		//},
+		"listen": m{
+			"host": udpAddr.IP.String(),
+			"port": udpAddr.Port,
+		},
+		"logging": m{
+			"timestamp_format": fmt.Sprintf("%v 15:04:05.000000", name),
+			"level":            l.Level.String(),
+		},
+	}
+	cb, err := yaml.Marshal(mc)
+	if err != nil {
+		panic(err)
+	}
+
+	config := nebula.NewConfig(l)
+	config.LoadString(string(cb))
+
+	control, err := nebula.Main(config, false, "e2e-test", l, nil)
+
+	if err != nil {
+		panic(err)
+	}
+
+	return control, vpnIpNet.IP, &udpAddr
+}
+
+// newTestCaCert will generate a CA cert
+func newTestCaCert(before, after time.Time, ips, subnets []*net.IPNet, groups []string) (*cert.NebulaCertificate, []byte, []byte, []byte) {
+	pub, priv, err := ed25519.GenerateKey(rand.Reader)
+	if before.IsZero() {
+		before = time.Now().Add(time.Second * -60).Round(time.Second)
+	}
+	if after.IsZero() {
+		after = time.Now().Add(time.Second * 60).Round(time.Second)
+	}
+
+	nc := &cert.NebulaCertificate{
+		Details: cert.NebulaCertificateDetails{
+			Name:           "test ca",
+			NotBefore:      time.Unix(before.Unix(), 0),
+			NotAfter:       time.Unix(after.Unix(), 0),
+			PublicKey:      pub,
+			IsCA:           true,
+			InvertedGroups: make(map[string]struct{}),
+		},
+	}
+
+	if len(ips) > 0 {
+		nc.Details.Ips = ips
+	}
+
+	if len(subnets) > 0 {
+		nc.Details.Subnets = subnets
+	}
+
+	if len(groups) > 0 {
+		nc.Details.Groups = groups
+	}
+
+	err = nc.Sign(priv)
+	if err != nil {
+		panic(err)
+	}
+
+	pem, err := nc.MarshalToPEM()
+	if err != nil {
+		panic(err)
+	}
+
+	return nc, pub, priv, pem
+}
+
+// newTestCert will generate a signed certificate with the provided details.
+// Expiry times are defaulted if you do not pass them in
+func newTestCert(ca *cert.NebulaCertificate, key []byte, name string, before, after time.Time, ip *net.IPNet, subnets []*net.IPNet, groups []string) (*cert.NebulaCertificate, []byte, []byte, []byte) {
+	issuer, err := ca.Sha256Sum()
+	if err != nil {
+		panic(err)
+	}
+
+	if before.IsZero() {
+		before = time.Now().Add(time.Second * -60).Round(time.Second)
+	}
+
+	if after.IsZero() {
+		after = time.Now().Add(time.Second * 60).Round(time.Second)
+	}
+
+	pub, rawPriv := x25519Keypair()
+
+	nc := &cert.NebulaCertificate{
+		Details: cert.NebulaCertificateDetails{
+			Name:           name,
+			Ips:            []*net.IPNet{ip},
+			Subnets:        subnets,
+			Groups:         groups,
+			NotBefore:      time.Unix(before.Unix(), 0),
+			NotAfter:       time.Unix(after.Unix(), 0),
+			PublicKey:      pub,
+			IsCA:           false,
+			Issuer:         issuer,
+			InvertedGroups: make(map[string]struct{}),
+		},
+	}
+
+	err = nc.Sign(key)
+	if err != nil {
+		panic(err)
+	}
+
+	pem, err := nc.MarshalToPEM()
+	if err != nil {
+		panic(err)
+	}
+
+	return nc, pub, cert.MarshalX25519PrivateKey(rawPriv), pem
+}
+
+func x25519Keypair() ([]byte, []byte) {
+	var pubkey, privkey [32]byte
+	if _, err := io.ReadFull(rand.Reader, privkey[:]); err != nil {
+		panic(err)
+	}
+	curve25519.ScalarBaseMult(&pubkey, &privkey)
+	return pubkey[:], privkey[:]
+}
+
+func ip2int(ip []byte) uint32 {
+	if len(ip) == 16 {
+		return binary.BigEndian.Uint32(ip[12:16])
+	}
+	return binary.BigEndian.Uint32(ip)
+}
+
+func int2ip(nn uint32) net.IP {
+	ip := make(net.IP, 4)
+	binary.BigEndian.PutUint32(ip, nn)
+	return ip
+}
+
+type doneCb func()
+
+func deadline(t *testing.T, seconds time.Duration) doneCb {
+	timeout := time.After(seconds * time.Second)
+	done := make(chan bool)
+	go func() {
+		select {
+		case <-timeout:
+			t.Fatal("Test did not finish in time")
+		case <-done:
+		}
+	}()
+
+	return func() {
+		done <- true
+	}
+}
+
+func assertTunnel(t *testing.T, vpnIpA, vpnIpB net.IP, controlA, controlB *nebula.Control, r *router.R) {
+	// Send a packet from them to me
+	controlB.InjectTunUDPPacket(vpnIpA, 80, 90, []byte("Hi from B"))
+	bPacket := r.RouteUntilTxTun(controlB, controlA)
+	assertUdpPacket(t, []byte("Hi from B"), bPacket, vpnIpB, vpnIpA, 90, 80)
+
+	// And once more from me to them
+	controlA.InjectTunUDPPacket(vpnIpB, 80, 90, []byte("Hello from A"))
+	aPacket := r.RouteUntilTxTun(controlA, controlB)
+	assertUdpPacket(t, []byte("Hello from A"), aPacket, vpnIpA, vpnIpB, 90, 80)
+}
+
+func assertHostInfoPair(t *testing.T, addrA, addrB *net.UDPAddr, vpnIpA, vpnIpB net.IP, controlA, controlB *nebula.Control) {
+	// Get both host infos
+	hBinA := controlA.GetHostInfoByVpnIP(ip2int(vpnIpB), false)
+	assert.NotNil(t, hBinA, "Host B was not found by vpnIP in controlA")
+
+	hAinB := controlB.GetHostInfoByVpnIP(ip2int(vpnIpA), false)
+	assert.NotNil(t, hAinB, "Host A was not found by vpnIP in controlB")
+
+	// Check that both vpn and real addr are correct
+	assert.Equal(t, vpnIpB, hBinA.VpnIP, "Host B VpnIp is wrong in control A")
+	assert.Equal(t, vpnIpA, hAinB.VpnIP, "Host A VpnIp is wrong in control B")
+
+	assert.Equal(t, addrB.IP.To16(), hBinA.CurrentRemote.IP.To16(), "Host B remote ip is wrong in control A")
+	assert.Equal(t, addrA.IP.To16(), hAinB.CurrentRemote.IP.To16(), "Host A remote ip is wrong in control B")
+
+	assert.Equal(t, addrB.Port, int(hBinA.CurrentRemote.Port), "Host B remote port is wrong in control A")
+	assert.Equal(t, addrA.Port, int(hAinB.CurrentRemote.Port), "Host A remote port is wrong in control B")
+
+	// Check that our indexes match
+	assert.Equal(t, hBinA.LocalIndex, hAinB.RemoteIndex, "Host B local index does not match host A remote index")
+	assert.Equal(t, hBinA.RemoteIndex, hAinB.LocalIndex, "Host B remote index does not match host A local index")
+
+	//TODO: Would be nice to assert this memory
+	//checkIndexes := func(name string, hm *HostMap, hi *HostInfo) {
+	//	hBbyIndex := hmA.Indexes[hBinA.localIndexId]
+	//	assert.NotNil(t, hBbyIndex, "Could not host info by local index in %s", name)
+	//	assert.Equal(t, &hBbyIndex, &hBinA, "%s Indexes map did not point to the right host info", name)
+	//
+	//	//TODO: remote indexes are susceptible to collision
+	//	hBbyRemoteIndex := hmA.RemoteIndexes[hBinA.remoteIndexId]
+	//	assert.NotNil(t, hBbyIndex, "Could not host info by remote index in %s", name)
+	//	assert.Equal(t, &hBbyRemoteIndex, &hBinA, "%s RemoteIndexes did not point to the right host info", name)
+	//}
+	//
+	//// Check hostmap indexes too
+	//checkIndexes("hmA", hmA, hBinA)
+	//checkIndexes("hmB", hmB, hAinB)
+}
+
+func assertUdpPacket(t *testing.T, expected, b []byte, fromIp, toIp net.IP, fromPort, toPort uint16) {
+	packet := gopacket.NewPacket(b, layers.LayerTypeIPv4, gopacket.Lazy)
+	v4 := packet.Layer(layers.LayerTypeIPv4).(*layers.IPv4)
+	assert.NotNil(t, v4, "No ipv4 data found")
+
+	assert.Equal(t, fromIp, v4.SrcIP, "Source ip was incorrect")
+	assert.Equal(t, toIp, v4.DstIP, "Dest ip was incorrect")
+
+	udp := packet.Layer(layers.LayerTypeUDP).(*layers.UDP)
+	assert.NotNil(t, udp, "No udp data found")
+
+	assert.Equal(t, fromPort, uint16(udp.SrcPort), "Source port was incorrect")
+	assert.Equal(t, toPort, uint16(udp.DstPort), "Dest port was incorrect")
+
+	data := packet.ApplicationLayer()
+	assert.NotNil(t, data)
+	assert.Equal(t, expected, data.Payload(), "Data was incorrect")
+}
+
+func NewTestLogger() *logrus.Logger {
+	l := logrus.New()
+
+	v := os.Getenv("TEST_LOGS")
+	if v == "" {
+		l.SetOutput(ioutil.Discard)
+		return l
+	}
+
+	switch v {
+	case "2":
+		l.SetLevel(logrus.DebugLevel)
+	case "3":
+		l.SetLevel(logrus.TraceLevel)
+	default:
+		l.SetLevel(logrus.InfoLevel)
+	}
+
+	return l
+}

e2e/router/doc.go

@@ -0,0 +1,3 @@
+package router
+
+// This file exists to allow `go fmt` to traverse here on its own. The build tags were keeping it out before

e2e/router/router.go

@@ -0,0 +1,320 @@
+// +build e2e_testing
+
+package router
+
+import (
+	"fmt"
+	"net"
+	"reflect"
+	"strconv"
+	"sync"
+
+	"github.com/slackhq/nebula"
+)
+
+type R struct {
+	// Simple map of the ip:port registered on a control to the control
+	// Basically a router, right?
+	controls map[string]*nebula.Control
+
+	// A map for inbound packets for a control that doesn't know about this address
+	inNat map[string]*nebula.Control
+
+	// A last used map, if an inbound packet hit the inNat map then
+	// all return packets should use the same last used inbound address for the outbound sender
+	// map[from address + ":" + to address] => ip:port to rewrite in the udp packet to receiver
+	outNat map[string]net.UDPAddr
+
+	// All interactions are locked to help serialize behavior
+	sync.Mutex
+}
+
+type ExitType int
+
+const (
+	// Keeps routing, the function will get called again on the next packet
+	KeepRouting ExitType = 0
+	// Does not route this packet and exits immediately
+	ExitNow ExitType = 1
+	// Routes this packet and exits immediately afterwards
+	RouteAndExit ExitType = 2
+)
+
+type ExitFunc func(packet *nebula.UdpPacket, receiver *nebula.Control) ExitType
+
+func NewR(controls ...*nebula.Control) *R {
+	r := &R{
+		controls: make(map[string]*nebula.Control),
+		inNat:    make(map[string]*nebula.Control),
+		outNat:   make(map[string]net.UDPAddr),
+	}
+
+	for _, c := range controls {
+		addr := c.GetUDPAddr()
+		if _, ok := r.controls[addr]; ok {
+			panic("Duplicate listen address: " + addr)
+		}
+		r.controls[addr] = c
+	}
+
+	return r
+}
+
+// AddRoute will place the nebula controller at the ip and port specified.
+// It does not look at the addr attached to the instance.
+// If a route is used, this will behave like a NAT for the return path.
+// Rewriting the source ip:port to what was last sent to from the origin
+func (r *R) AddRoute(ip net.IP, port uint16, c *nebula.Control) {
+	r.Lock()
+	defer r.Unlock()
+
+	inAddr := net.JoinHostPort(ip.String(), fmt.Sprintf("%v", port))
+	if _, ok := r.inNat[inAddr]; ok {
+		panic("Duplicate listen address inNat: " + inAddr)
+	}
+	r.inNat[inAddr] = c
+}
+
+// OnceFrom will route a single packet from sender then return
+// If the router doesn't have the nebula controller for that address, we panic
+func (r *R) OnceFrom(sender *nebula.Control) {
+	r.RouteExitFunc(sender, func(*nebula.UdpPacket, *nebula.Control) ExitType {
+		return RouteAndExit
+	})
+}
+
+// RouteUntilTxTun will route for sender and return when a packet is seen on receivers tun
+// If the router doesn't have the nebula controller for that address, we panic
+func (r *R) RouteUntilTxTun(sender *nebula.Control, receiver *nebula.Control) []byte {
+	tunTx := receiver.GetTunTxChan()
+	udpTx := sender.GetUDPTxChan()
+
+	for {
+		select {
+		// Maybe we already have something on the tun for us
+		case b := <-tunTx:
+			return b
+
+		// Nope, lets push the sender along
+		case p := <-udpTx:
+			outAddr := sender.GetUDPAddr()
+			r.Lock()
+			inAddr := net.JoinHostPort(p.ToIp.String(), fmt.Sprintf("%v", p.ToPort))
+			c := r.getControl(outAddr, inAddr, p)
+			if c == nil {
+				r.Unlock()
+				panic("No control for udp tx")
+			}
+
+			c.InjectUDPPacket(p)
+			r.Unlock()
+		}
+	}
+}
+
+// RouteExitFunc will call the whatDo func with each udp packet from sender.
+// whatDo can return:
+//   - exitNow: the packet will not be routed and this call will return immediately
+//   - routeAndExit: this call will return immediately after routing the last packet from sender
+//   - keepRouting: the packet will be routed and whatDo will be called again on the next packet from sender
+func (r *R) RouteExitFunc(sender *nebula.Control, whatDo ExitFunc) {
+	h := &nebula.Header{}
+	for {
+		p := sender.GetFromUDP(true)
+		r.Lock()
+		if err := h.Parse(p.Data); err != nil {
+			panic(err)
+		}
+
+		outAddr := sender.GetUDPAddr()
+		inAddr := net.JoinHostPort(p.ToIp.String(), fmt.Sprintf("%v", p.ToPort))
+		receiver := r.getControl(outAddr, inAddr, p)
+		if receiver == nil {
+			r.Unlock()
+			panic("Can't route for host: " + inAddr)
+		}
+
+		e := whatDo(p, receiver)
+		switch e {
+		case ExitNow:
+			r.Unlock()
+			return
+
+		case RouteAndExit:
+			receiver.InjectUDPPacket(p)
+			r.Unlock()
+			return
+
+		case KeepRouting:
+			receiver.InjectUDPPacket(p)
+
+		default:
+			panic(fmt.Sprintf("Unknown exitFunc return: %v", e))
+		}
+
+		r.Unlock()
+	}
+}
+
+// RouteUntilAfterMsgType will route for sender until a message type is seen and sent from sender
+// If the router doesn't have the nebula controller for that address, we panic
+func (r *R) RouteUntilAfterMsgType(sender *nebula.Control, msgType nebula.NebulaMessageType, subType nebula.NebulaMessageSubType) {
+	h := &nebula.Header{}
+	r.RouteExitFunc(sender, func(p *nebula.UdpPacket, r *nebula.Control) ExitType {
+		if err := h.Parse(p.Data); err != nil {
+			panic(err)
+		}
+		if h.Type == msgType && h.Subtype == subType {
+			return RouteAndExit
+		}
+
+		return KeepRouting
+	})
+}
+
+// RouteForUntilAfterToAddr will route for sender and return only after it sees and sends a packet destined for toAddr
+// finish can be any of the exitType values except `keepRouting`, the default value is `routeAndExit`
+// If the router doesn't have the nebula controller for that address, we panic
+func (r *R) RouteForUntilAfterToAddr(sender *nebula.Control, toAddr *net.UDPAddr, finish ExitType) {
+	if finish == KeepRouting {
+		finish = RouteAndExit
+	}
+
+	r.RouteExitFunc(sender, func(p *nebula.UdpPacket, r *nebula.Control) ExitType {
+		if p.ToIp.Equal(toAddr.IP) && p.ToPort == uint16(toAddr.Port) {
+			return finish
+		}
+
+		return KeepRouting
+	})
+}
+
+// RouteForAllExitFunc will route for every registered controller and calls the whatDo func with each udp packet from
+// whatDo can return:
+//   - exitNow: the packet will not be routed and this call will return immediately
+//   - routeAndExit: this call will return immediately after routing the last packet from sender
+//   - keepRouting: the packet will be routed and whatDo will be called again on the next packet from sender
+func (r *R) RouteForAllExitFunc(whatDo ExitFunc) {
+	sc := make([]reflect.SelectCase, len(r.controls))
+	cm := make([]*nebula.Control, len(r.controls))
+
+	i := 0
+	for _, c := range r.controls {
+		sc[i] = reflect.SelectCase{
+			Dir:  reflect.SelectRecv,
+			Chan: reflect.ValueOf(c.GetUDPTxChan()),
+			Send: reflect.Value{},
+		}
+
+		cm[i] = c
+		i++
+	}
+
+	for {
+		x, rx, _ := reflect.Select(sc)
+		r.Lock()
+
+		p := rx.Interface().(*nebula.UdpPacket)
+
+		outAddr := cm[x].GetUDPAddr()
+		inAddr := net.JoinHostPort(p.ToIp.String(), fmt.Sprintf("%v", p.ToPort))
+		receiver := r.getControl(outAddr, inAddr, p)
+		if receiver == nil {
+			r.Unlock()
+			panic("Can't route for host: " + inAddr)
+		}
+
+		e := whatDo(p, receiver)
+		switch e {
+		case ExitNow:
+			r.Unlock()
+			return
+
+		case RouteAndExit:
+			receiver.InjectUDPPacket(p)
+			r.Unlock()
+			return
+
+		case KeepRouting:
+			receiver.InjectUDPPacket(p)
+
+		default:
+			panic(fmt.Sprintf("Unknown exitFunc return: %v", e))
+		}
+		r.Unlock()
+	}
+}
+
+// FlushAll will route for every registered controller, exiting once there are no packets left to route
+func (r *R) FlushAll() {
+	sc := make([]reflect.SelectCase, len(r.controls))
+	cm := make([]*nebula.Control, len(r.controls))
+
+	i := 0
+	for _, c := range r.controls {
+		sc[i] = reflect.SelectCase{
+			Dir:  reflect.SelectRecv,
+			Chan: reflect.ValueOf(c.GetUDPTxChan()),
+			Send: reflect.Value{},
+		}
+
+		cm[i] = c
+		i++
+	}
+
+	// Add a default case to exit when nothing is left to send
+	sc = append(sc, reflect.SelectCase{
+		Dir:  reflect.SelectDefault,
+		Chan: reflect.Value{},
+		Send: reflect.Value{},
+	})
+
+	for {
+		x, rx, ok := reflect.Select(sc)
+		if !ok {
+			return
+		}
+		r.Lock()
+
+		p := rx.Interface().(*nebula.UdpPacket)
+
+		outAddr := cm[x].GetUDPAddr()
+		inAddr := net.JoinHostPort(p.ToIp.String(), fmt.Sprintf("%v", p.ToPort))
+		receiver := r.getControl(outAddr, inAddr, p)
+		if receiver == nil {
+			r.Unlock()
+			panic("Can't route for host: " + inAddr)
+		}
+		r.Unlock()
+	}
+}
+
+// getControl performs or seeds NAT translation and returns the control for toAddr, p from fields may change
+// This is an internal router function, the caller must hold the lock
+func (r *R) getControl(fromAddr, toAddr string, p *nebula.UdpPacket) *nebula.Control {
+	if newAddr, ok := r.outNat[fromAddr+":"+toAddr]; ok {
+		p.FromIp = newAddr.IP
+		p.FromPort = uint16(newAddr.Port)
+	}
+
+	c, ok := r.inNat[toAddr]
+	if ok {
+		sHost, sPort, err := net.SplitHostPort(toAddr)
+		if err != nil {
+			panic(err)
+		}
+
+		port, err := strconv.Atoi(sPort)
+		if err != nil {
+			panic(err)
+		}
+
+		r.outNat[c.GetUDPAddr()+":"+fromAddr] = net.UDPAddr{
+			IP:   net.ParseIP(sHost),
+			Port: port,
+		}
+		return c
+	}
+
+	return r.controls[toAddr]
+}

examples/config.yml

@@ -74,6 +74,7 @@ lighthouse:
 # Port Nebula will be listening on. The default here is 4242. For a lighthouse node, the port should be defined,
 # however using port 0 will dynamically assign a port and is recommended for roaming nodes.
 listen:
+  # To listen on both any ipv4 and ipv6 use "[::]"
   host: 0.0.0.0
   port: 4242
   # Sets the max number of packets to pull from the kernel for each syscall (under systems that support recvmmsg)
@@ -86,6 +87,15 @@ listen:
   #read_buffer: 10485760
   #write_buffer: 10485760
 
+# EXPERIMENTAL: This option is currently only supported on linux and may
+# change in future minor releases.
+#
+# Routines is the number of thread pairs to run that consume from the tun and UDP queues.
+# Currently, this defaults to 1 which means we have 1 tun queue reader and 1
+# UDP queue reader. Setting this above one will set IFF_MULTI_QUEUE on the tun
+# device and SO_REUSEPORT on the UDP socket to allow multiple queues.
+#routines: 1
+
 punchy:
   # Continues to punch inbound/outbound at a regular interval to avoid expiration of firewall nat mappings
   punch: true
@@ -98,7 +108,7 @@ punchy:
   # delays a punch response for misbehaving NATs, default is 1 second, respond must be true to take effect
   #delay: 1s
 
-# Cipher allows you to choose between the available ciphers for your network.
+# Cipher allows you to choose between the available ciphers for your network. Options are chachapoly or aes
 # IMPORTANT: this value must be identical on ALL NODES/LIGHTHOUSES. We do not/will not support use of different ciphers simultaneously!
 #cipher: chachapoly
 
@@ -192,16 +202,16 @@ logging:
 
 # Handshake Manger Settings
 #handshakes:
-  # Total time to try a handshake = sequence of `try_interval * retries`
-  # With 100ms interval and 20 retries it is 23.5 seconds
+  # Handshakes are sent to all known addresses at each interval with a linear backoff,
+  # Wait try_interval after the 1st attempt, 2 * try_interval after the 2nd, etc, until the handshake is older than timeout
+  # A 100ms interval with the default 10 retries will give a handshake 5.5 seconds to resolve before timing out
   #try_interval: 100ms
   #retries: 20
-  # wait_rotation is the number of handshake attempts to do before starting to try non-local IP addresses
-  #wait_rotation: 5
   # trigger_buffer is the size of the buffer channel for quickly sending handshakes
   # after receiving the response for lighthouse queries
   #trigger_buffer: 64
 
+
 # Nebula security group configuration
 firewall:
   conntrack:

examples/quickstart-vagrant/ansible/roles/nebula/files/systemd.nebula.service

@@ -5,8 +5,6 @@ After=basic.target network.target
 
 [Service]
 SyslogIdentifier=nebula
-StandardOutput=syslog
-StandardError=syslog
 ExecReload=/bin/kill -HUP $MAINPID
 ExecStart=/usr/local/bin/nebula -config /etc/nebula/config.yml
 Restart=always

examples/service_scripts/nebula.service

@@ -2,11 +2,10 @@
 Description=nebula
 Wants=basic.target
 After=basic.target network.target
+Before=sshd.service
 
 [Service]
 SyslogIdentifier=nebula
-StandardOutput=syslog
-StandardError=syslog
 ExecReload=/bin/kill -HUP $MAINPID
 ExecStart=/usr/local/bin/nebula -config /etc/nebula/config.yml
 Restart=always

firewall.go

@@ -12,6 +12,7 @@ import (
 	"strconv"
 	"strings"
 	"sync"
+	"sync/atomic"
 	"time"
 
 	"github.com/rcrowley/go-metrics"
@@ -67,8 +68,18 @@ type Firewall struct {
 	rules        string
 	rulesVersion uint16
 
-	trackTCPRTT  bool
-	metricTCPRTT metrics.Histogram
+	trackTCPRTT     bool
+	metricTCPRTT    metrics.Histogram
+	incomingMetrics firewallMetrics
+	outgoingMetrics firewallMetrics
+
+	l *logrus.Logger
+}
+
+type firewallMetrics struct {
+	droppedLocalIP  metrics.Counter
+	droppedRemoteIP metrics.Counter
+	droppedNoRule   metrics.Counter
 }
 
 type FirewallConntrack struct {
@@ -155,7 +166,7 @@ func (fp FirewallPacket) MarshalJSON() ([]byte, error) {
 }
 
 // NewFirewall creates a new Firewall object. A TimerWheel is created for you from the provided timeouts.
-func NewFirewall(tcpTimeout, UDPTimeout, defaultTimeout time.Duration, c *cert.NebulaCertificate) *Firewall {
+func NewFirewall(l *logrus.Logger, tcpTimeout, UDPTimeout, defaultTimeout time.Duration, c *cert.NebulaCertificate) *Firewall {
 	//TODO: error on 0 duration
 	var min, max time.Duration
 
@@ -193,12 +204,25 @@ func NewFirewall(tcpTimeout, UDPTimeout, defaultTimeout time.Duration, c *cert.N
 		UDPTimeout:     UDPTimeout,
 		DefaultTimeout: defaultTimeout,
 		localIps:       localIps,
-		metricTCPRTT:   metrics.GetOrRegisterHistogram("network.tcp.rtt", nil, metrics.NewExpDecaySample(1028, 0.015)),
+		l:              l,
+
+		metricTCPRTT: metrics.GetOrRegisterHistogram("network.tcp.rtt", nil, metrics.NewExpDecaySample(1028, 0.015)),
+		incomingMetrics: firewallMetrics{
+			droppedLocalIP:  metrics.GetOrRegisterCounter("firewall.incoming.dropped.local_ip", nil),
+			droppedRemoteIP: metrics.GetOrRegisterCounter("firewall.incoming.dropped.remote_ip", nil),
+			droppedNoRule:   metrics.GetOrRegisterCounter("firewall.incoming.dropped.no_rule", nil),
+		},
+		outgoingMetrics: firewallMetrics{
+			droppedLocalIP:  metrics.GetOrRegisterCounter("firewall.outgoing.dropped.local_ip", nil),
+			droppedRemoteIP: metrics.GetOrRegisterCounter("firewall.outgoing.dropped.remote_ip", nil),
+			droppedNoRule:   metrics.GetOrRegisterCounter("firewall.outgoing.dropped.no_rule", nil),
+		},
 	}
 }
 
-func NewFirewallFromConfig(nc *cert.NebulaCertificate, c *Config) (*Firewall, error) {
+func NewFirewallFromConfig(l *logrus.Logger, nc *cert.NebulaCertificate, c *Config) (*Firewall, error) {
 	fw := NewFirewall(
+		l,
 		c.GetDuration("firewall.conntrack.tcp_timeout", time.Minute*12),
 		c.GetDuration("firewall.conntrack.udp_timeout", time.Minute*3),
 		c.GetDuration("firewall.conntrack.default_timeout", time.Minute*10),
@@ -206,12 +230,12 @@ func NewFirewallFromConfig(nc *cert.NebulaCertificate, c *Config) (*Firewall, er
 		//TODO: max_connections
 	)
 
-	err := AddFirewallRulesFromConfig(false, c, fw)
+	err := AddFirewallRulesFromConfig(l, false, c, fw)
 	if err != nil {
 		return nil, err
 	}
 
-	err = AddFirewallRulesFromConfig(true, c, fw)
+	err = AddFirewallRulesFromConfig(l, true, c, fw)
 	if err != nil {
 		return nil, err
 	}
@@ -239,7 +263,7 @@ func (f *Firewall) AddRule(incoming bool, proto uint8, startPort int32, endPort
 	if !incoming {
 		direction = "outgoing"
 	}
-	l.WithField("firewallRule", m{"direction": direction, "proto": proto, "startPort": startPort, "endPort": endPort, "groups": groups, "host": host, "ip": sIp, "caName": caName, "caSha": caSha}).
+	f.l.WithField("firewallRule", m{"direction": direction, "proto": proto, "startPort": startPort, "endPort": endPort, "groups": groups, "host": host, "ip": sIp, "caName": caName, "caSha": caSha}).
 		Info("Firewall rule added")
 
 	var (
@@ -275,7 +299,7 @@ func (f *Firewall) GetRuleHash() string {
 	return hex.EncodeToString(sum[:])
 }
 
-func AddFirewallRulesFromConfig(inbound bool, config *Config, fw FirewallInterface) error {
+func AddFirewallRulesFromConfig(l *logrus.Logger, inbound bool, config *Config, fw FirewallInterface) error {
 	var table string
 	if inbound {
 		table = "firewall.inbound"
@@ -295,7 +319,7 @@ func AddFirewallRulesFromConfig(inbound bool, config *Config, fw FirewallInterfa
 
 	for i, t := range rs {
 		var groups []string
-		r, err := convertRule(t, table, i)
+		r, err := convertRule(l, t, table, i)
 		if err != nil {
 			return fmt.Errorf("%s rule #%v; %s", table, i, err)
 		}
@@ -372,26 +396,29 @@ var ErrNoMatchingRule = errors.New("no matching rule in firewall table")
 
 // Drop returns an error if the packet should be dropped, explaining why. It
 // returns nil if the packet should not be dropped.
-func (f *Firewall) Drop(packet []byte, fp FirewallPacket, incoming bool, h *HostInfo, caPool *cert.NebulaCAPool) error {
+func (f *Firewall) Drop(packet []byte, fp FirewallPacket, incoming bool, h *HostInfo, caPool *cert.NebulaCAPool, localCache ConntrackCache) error {
 	// Check if we spoke to this tuple, if we did then allow this packet
-	if f.inConns(packet, fp, incoming, h, caPool) {
+	if f.inConns(packet, fp, incoming, h, caPool, localCache) {
 		return nil
 	}
 
 	// Make sure remote address matches nebula certificate
 	if remoteCidr := h.remoteCidr; remoteCidr != nil {
 		if remoteCidr.Contains(fp.RemoteIP) == nil {
+			f.metrics(incoming).droppedRemoteIP.Inc(1)
 			return ErrInvalidRemoteIP
 		}
 	} else {
 		// Simple case: Certificate has one IP and no subnets
 		if fp.RemoteIP != h.hostId {
+			f.metrics(incoming).droppedRemoteIP.Inc(1)
 			return ErrInvalidRemoteIP
 		}
 	}
 
 	// Make sure we are supposed to be handling this local ip address
 	if f.localIps.Contains(fp.LocalIP) == nil {
+		f.metrics(incoming).droppedLocalIP.Inc(1)
 		return ErrInvalidLocalIP
 	}
 
@@ -402,6 +429,7 @@ func (f *Firewall) Drop(packet []byte, fp FirewallPacket, incoming bool, h *Host
 
 	// We now know which firewall table to check against
 	if !table.match(fp, incoming, h.ConnectionState.peerCert, caPool) {
+		f.metrics(incoming).droppedNoRule.Inc(1)
 		return ErrNoMatchingRule
 	}
 
@@ -411,6 +439,14 @@ func (f *Firewall) Drop(packet []byte, fp FirewallPacket, incoming bool, h *Host
 	return nil
 }
 
+func (f *Firewall) metrics(incoming bool) firewallMetrics {
+	if incoming {
+		return f.incomingMetrics
+	} else {
+		return f.outgoingMetrics
+	}
+}
+
 // Destroy cleans up any known cyclical references so the object can be free'd my GC. This should be called if a new
 // firewall object is created
 func (f *Firewall) Destroy() {
@@ -426,7 +462,12 @@ func (f *Firewall) EmitStats() {
 	metrics.GetOrRegisterGauge("firewall.rules.version", nil).Update(int64(f.rulesVersion))
 }
 
-func (f *Firewall) inConns(packet []byte, fp FirewallPacket, incoming bool, h *HostInfo, caPool *cert.NebulaCAPool) bool {
+func (f *Firewall) inConns(packet []byte, fp FirewallPacket, incoming bool, h *HostInfo, caPool *cert.NebulaCAPool, localCache ConntrackCache) bool {
+	if localCache != nil {
+		if _, ok := localCache[fp]; ok {
+			return true
+		}
+	}
 	conntrack := f.Conntrack
 	conntrack.Lock()
 
@@ -453,8 +494,8 @@ func (f *Firewall) inConns(packet []byte, fp FirewallPacket, incoming bool, h *H
 
 		// We now know which firewall table to check against
 		if !table.match(fp, c.incoming, h.ConnectionState.peerCert, caPool) {
-			if l.Level >= logrus.DebugLevel {
-				h.logger().
+			if f.l.Level >= logrus.DebugLevel {
+				h.logger(f.l).
 					WithField("fwPacket", fp).
 					WithField("incoming", c.incoming).
 					WithField("rulesVersion", f.rulesVersion).
@@ -466,8 +507,8 @@ func (f *Firewall) inConns(packet []byte, fp FirewallPacket, incoming bool, h *H
 			return false
 		}
 
-		if l.Level >= logrus.DebugLevel {
-			h.logger().
+		if f.l.Level >= logrus.DebugLevel {
+			h.logger(f.l).
 				WithField("fwPacket", fp).
 				WithField("incoming", c.incoming).
 				WithField("rulesVersion", f.rulesVersion).
@@ -494,6 +535,10 @@ func (f *Firewall) inConns(packet []byte, fp FirewallPacket, incoming bool, h *H
 
 	conntrack.Unlock()
 
+	if localCache != nil {
+		localCache[fp] = struct{}{}
+	}
+
 	return true
 }
 
@@ -785,7 +830,7 @@ type rule struct {
 	CASha  string
 }
 
-func convertRule(p interface{}, table string, i int) (rule, error) {
+func convertRule(l *logrus.Logger, p interface{}, table string, i int) (rule, error) {
 	r := rule{}
 
 	m, ok := p.(map[interface{}]interface{})
@@ -923,3 +968,54 @@ func (f *Firewall) checkTCPRTT(c *conn, p []byte) bool {
 	c.Seq = 0
 	return true
 }
+
+// ConntrackCache is used as a local routine cache to know if a given flow
+// has been seen in the conntrack table.
+type ConntrackCache map[FirewallPacket]struct{}
+
+type ConntrackCacheTicker struct {
+	cacheV    uint64
+	cacheTick uint64
+
+	cache ConntrackCache
+}
+
+func NewConntrackCacheTicker(d time.Duration) *ConntrackCacheTicker {
+	if d == 0 {
+		return nil
+	}
+
+	c := &ConntrackCacheTicker{
+		cache: ConntrackCache{},
+	}
+
+	go c.tick(d)
+
+	return c
+}
+
+func (c *ConntrackCacheTicker) tick(d time.Duration) {
+	for {
+		time.Sleep(d)
+		atomic.AddUint64(&c.cacheTick, 1)
+	}
+}
+
+// Get checks if the cache ticker has moved to the next version before returning
+// the map. If it has moved, we reset the map.
+func (c *ConntrackCacheTicker) Get(l *logrus.Logger) ConntrackCache {
+	if c == nil {
+		return nil
+	}
+	if tick := atomic.LoadUint64(&c.cacheTick); tick != c.cacheV {
+		c.cacheV = tick
+		if ll := len(c.cache); ll > 0 {
+			if l.Level == logrus.DebugLevel {
+				l.WithField("len", ll).Debug("resetting conntrack cache")
+			}
+			c.cache = make(ConntrackCache, ll)
+		}
+	}
+
+	return c.cache
+}

firewall_test.go

@@ -15,8 +15,9 @@ import (
 )
 
 func TestNewFirewall(t *testing.T) {
+	l := NewTestLogger()
 	c := &cert.NebulaCertificate{}
-	fw := NewFirewall(time.Second, time.Minute, time.Hour, c)
+	fw := NewFirewall(l, time.Second, time.Minute, time.Hour, c)
 	conntrack := fw.Conntrack
 	assert.NotNil(t, conntrack)
 	assert.NotNil(t, conntrack.Conns)
@@ -31,35 +32,34 @@ func TestNewFirewall(t *testing.T) {
 	assert.Equal(t, time.Hour, conntrack.TimerWheel.wheelDuration)
 	assert.Equal(t, 3601, conntrack.TimerWheel.wheelLen)
 
-	fw = NewFirewall(time.Second, time.Hour, time.Minute, c)
+	fw = NewFirewall(l, time.Second, time.Hour, time.Minute, c)
 	assert.Equal(t, time.Hour, conntrack.TimerWheel.wheelDuration)
 	assert.Equal(t, 3601, conntrack.TimerWheel.wheelLen)
 
-	fw = NewFirewall(time.Hour, time.Second, time.Minute, c)
+	fw = NewFirewall(l, time.Hour, time.Second, time.Minute, c)
 	assert.Equal(t, time.Hour, conntrack.TimerWheel.wheelDuration)
 	assert.Equal(t, 3601, conntrack.TimerWheel.wheelLen)
 
-	fw = NewFirewall(time.Hour, time.Minute, time.Second, c)
+	fw = NewFirewall(l, time.Hour, time.Minute, time.Second, c)
 	assert.Equal(t, time.Hour, conntrack.TimerWheel.wheelDuration)
 	assert.Equal(t, 3601, conntrack.TimerWheel.wheelLen)
 
-	fw = NewFirewall(time.Minute, time.Hour, time.Second, c)
+	fw = NewFirewall(l, time.Minute, time.Hour, time.Second, c)
 	assert.Equal(t, time.Hour, conntrack.TimerWheel.wheelDuration)
 	assert.Equal(t, 3601, conntrack.TimerWheel.wheelLen)
 
-	fw = NewFirewall(time.Minute, time.Second, time.Hour, c)
+	fw = NewFirewall(l, time.Minute, time.Second, time.Hour, c)
 	assert.Equal(t, time.Hour, conntrack.TimerWheel.wheelDuration)
 	assert.Equal(t, 3601, conntrack.TimerWheel.wheelLen)
 }
 
 func TestFirewall_AddRule(t *testing.T) {
+	l := NewTestLogger()
 	ob := &bytes.Buffer{}
-	out := l.Out
 	l.SetOutput(ob)
-	defer l.SetOutput(out)
 
 	c := &cert.NebulaCertificate{}
-	fw := NewFirewall(time.Second, time.Minute, time.Hour, c)
+	fw := NewFirewall(l, time.Second, time.Minute, time.Hour, c)
 	assert.NotNil(t, fw.InRules)
 	assert.NotNil(t, fw.OutRules)
 
@@ -74,7 +74,7 @@ func TestFirewall_AddRule(t *testing.T) {
 	assert.Nil(t, fw.InRules.TCP[1].Any.CIDR.root.right)
 	assert.Nil(t, fw.InRules.TCP[1].Any.CIDR.root.value)
 
-	fw = NewFirewall(time.Second, time.Minute, time.Hour, c)
+	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, c)
 	assert.Nil(t, fw.AddRule(true, fwProtoUDP, 1, 1, []string{"g1"}, "", nil, "", ""))
 	assert.False(t, fw.InRules.UDP[1].Any.Any)
 	assert.Contains(t, fw.InRules.UDP[1].Any.Groups[0], "g1")
@@ -83,7 +83,7 @@ func TestFirewall_AddRule(t *testing.T) {
 	assert.Nil(t, fw.InRules.UDP[1].Any.CIDR.root.right)
 	assert.Nil(t, fw.InRules.UDP[1].Any.CIDR.root.value)
 
-	fw = NewFirewall(time.Second, time.Minute, time.Hour, c)
+	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, c)
 	assert.Nil(t, fw.AddRule(true, fwProtoICMP, 1, 1, []string{}, "h1", nil, "", ""))
 	assert.False(t, fw.InRules.ICMP[1].Any.Any)
 	assert.Empty(t, fw.InRules.ICMP[1].Any.Groups)
@@ -92,23 +92,23 @@ func TestFirewall_AddRule(t *testing.T) {
 	assert.Nil(t, fw.InRules.ICMP[1].Any.CIDR.root.right)
 	assert.Nil(t, fw.InRules.ICMP[1].Any.CIDR.root.value)
 
-	fw = NewFirewall(time.Second, time.Minute, time.Hour, c)
+	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, c)
 	assert.Nil(t, fw.AddRule(false, fwProtoAny, 1, 1, []string{}, "", ti, "", ""))
 	assert.False(t, fw.OutRules.AnyProto[1].Any.Any)
 	assert.Empty(t, fw.OutRules.AnyProto[1].Any.Groups)
 	assert.Empty(t, fw.OutRules.AnyProto[1].Any.Hosts)
 	assert.NotNil(t, fw.OutRules.AnyProto[1].Any.CIDR.Match(ip2int(ti.IP)))
 
-	fw = NewFirewall(time.Second, time.Minute, time.Hour, c)
+	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, c)
 	assert.Nil(t, fw.AddRule(true, fwProtoUDP, 1, 1, []string{"g1"}, "", nil, "ca-name", ""))
 	assert.Contains(t, fw.InRules.UDP[1].CANames, "ca-name")
 
-	fw = NewFirewall(time.Second, time.Minute, time.Hour, c)
+	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, c)
 	assert.Nil(t, fw.AddRule(true, fwProtoUDP, 1, 1, []string{"g1"}, "", nil, "", "ca-sha"))
 	assert.Contains(t, fw.InRules.UDP[1].CAShas, "ca-sha")
 
 	// Set any and clear fields
-	fw = NewFirewall(time.Second, time.Minute, time.Hour, c)
+	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, c)
 	assert.Nil(t, fw.AddRule(false, fwProtoAny, 0, 0, []string{"g1", "g2"}, "h1", ti, "", ""))
 	assert.Equal(t, []string{"g1", "g2"}, fw.OutRules.AnyProto[0].Any.Groups[0])
 	assert.Contains(t, fw.OutRules.AnyProto[0].Any.Hosts, "h1")
@@ -125,26 +125,25 @@ func TestFirewall_AddRule(t *testing.T) {
 	assert.Nil(t, fw.OutRules.AnyProto[0].Any.CIDR.root.right)
 	assert.Nil(t, fw.OutRules.AnyProto[0].Any.CIDR.root.value)
 
-	fw = NewFirewall(time.Second, time.Minute, time.Hour, c)
+	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, c)
 	assert.Nil(t, fw.AddRule(false, fwProtoAny, 0, 0, []string{}, "any", nil, "", ""))
 	assert.True(t, fw.OutRules.AnyProto[0].Any.Any)
 
-	fw = NewFirewall(time.Second, time.Minute, time.Hour, c)
+	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, c)
 	_, anyIp, _ := net.ParseCIDR("0.0.0.0/0")
 	assert.Nil(t, fw.AddRule(false, fwProtoAny, 0, 0, []string{}, "", anyIp, "", ""))
 	assert.True(t, fw.OutRules.AnyProto[0].Any.Any)
 
 	// Test error conditions
-	fw = NewFirewall(time.Second, time.Minute, time.Hour, c)
+	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, c)
 	assert.Error(t, fw.AddRule(true, math.MaxUint8, 0, 0, []string{}, "", nil, "", ""))
 	assert.Error(t, fw.AddRule(true, fwProtoAny, 10, 0, []string{}, "", nil, "", ""))
 }
 
 func TestFirewall_Drop(t *testing.T) {
+	l := NewTestLogger()
 	ob := &bytes.Buffer{}
-	out := l.Out
 	l.SetOutput(ob)
-	defer l.SetOutput(out)
 
 	p := FirewallPacket{
 		ip2int(net.IPv4(1, 2, 3, 4)),
@@ -177,49 +176,49 @@ func TestFirewall_Drop(t *testing.T) {
 	}
 	h.CreateRemoteCIDR(&c)
 
-	fw := NewFirewall(time.Second, time.Minute, time.Hour, &c)
+	fw := NewFirewall(l, time.Second, time.Minute, time.Hour, &c)
 	assert.Nil(t, fw.AddRule(true, fwProtoAny, 0, 0, []string{"any"}, "", nil, "", ""))
 	cp := cert.NewCAPool()
 
 	// Drop outbound
-	assert.Equal(t, fw.Drop([]byte{}, p, false, &h, cp), ErrNoMatchingRule)
+	assert.Equal(t, fw.Drop([]byte{}, p, false, &h, cp, nil), ErrNoMatchingRule)
 	// Allow inbound
 	resetConntrack(fw)
-	assert.NoError(t, fw.Drop([]byte{}, p, true, &h, cp))
+	assert.NoError(t, fw.Drop([]byte{}, p, true, &h, cp, nil))
 	// Allow outbound because conntrack
-	assert.NoError(t, fw.Drop([]byte{}, p, false, &h, cp))
+	assert.NoError(t, fw.Drop([]byte{}, p, false, &h, cp, nil))
 
 	// test remote mismatch
 	oldRemote := p.RemoteIP
 	p.RemoteIP = ip2int(net.IPv4(1, 2, 3, 10))
-	assert.Equal(t, fw.Drop([]byte{}, p, false, &h, cp), ErrInvalidRemoteIP)
+	assert.Equal(t, fw.Drop([]byte{}, p, false, &h, cp, nil), ErrInvalidRemoteIP)
 	p.RemoteIP = oldRemote
 
 	// ensure signer doesn't get in the way of group checks
-	fw = NewFirewall(time.Second, time.Minute, time.Hour, &c)
+	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, &c)
 	assert.Nil(t, fw.AddRule(true, fwProtoAny, 0, 0, []string{"nope"}, "", nil, "", "signer-shasum"))
 	assert.Nil(t, fw.AddRule(true, fwProtoAny, 0, 0, []string{"default-group"}, "", nil, "", "signer-shasum-bad"))
-	assert.Equal(t, fw.Drop([]byte{}, p, true, &h, cp), ErrNoMatchingRule)
+	assert.Equal(t, fw.Drop([]byte{}, p, true, &h, cp, nil), ErrNoMatchingRule)
 
 	// test caSha doesn't drop on match
-	fw = NewFirewall(time.Second, time.Minute, time.Hour, &c)
+	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, &c)
 	assert.Nil(t, fw.AddRule(true, fwProtoAny, 0, 0, []string{"nope"}, "", nil, "", "signer-shasum-bad"))
 	assert.Nil(t, fw.AddRule(true, fwProtoAny, 0, 0, []string{"default-group"}, "", nil, "", "signer-shasum"))
-	assert.NoError(t, fw.Drop([]byte{}, p, true, &h, cp))
+	assert.NoError(t, fw.Drop([]byte{}, p, true, &h, cp, nil))
 
 	// ensure ca name doesn't get in the way of group checks
 	cp.CAs["signer-shasum"] = &cert.NebulaCertificate{Details: cert.NebulaCertificateDetails{Name: "ca-good"}}
-	fw = NewFirewall(time.Second, time.Minute, time.Hour, &c)
+	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, &c)
 	assert.Nil(t, fw.AddRule(true, fwProtoAny, 0, 0, []string{"nope"}, "", nil, "ca-good", ""))
 	assert.Nil(t, fw.AddRule(true, fwProtoAny, 0, 0, []string{"default-group"}, "", nil, "ca-good-bad", ""))
-	assert.Equal(t, fw.Drop([]byte{}, p, true, &h, cp), ErrNoMatchingRule)
+	assert.Equal(t, fw.Drop([]byte{}, p, true, &h, cp, nil), ErrNoMatchingRule)
 
 	// test caName doesn't drop on match
 	cp.CAs["signer-shasum"] = &cert.NebulaCertificate{Details: cert.NebulaCertificateDetails{Name: "ca-good"}}
-	fw = NewFirewall(time.Second, time.Minute, time.Hour, &c)
+	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, &c)
 	assert.Nil(t, fw.AddRule(true, fwProtoAny, 0, 0, []string{"nope"}, "", nil, "ca-good-bad", ""))
 	assert.Nil(t, fw.AddRule(true, fwProtoAny, 0, 0, []string{"default-group"}, "", nil, "ca-good", ""))
-	assert.NoError(t, fw.Drop([]byte{}, p, true, &h, cp))
+	assert.NoError(t, fw.Drop([]byte{}, p, true, &h, cp, nil))
 }
 
 func BenchmarkFirewallTable_match(b *testing.B) {
@@ -317,10 +316,9 @@ func BenchmarkFirewallTable_match(b *testing.B) {
 }
 
 func TestFirewall_Drop2(t *testing.T) {
+	l := NewTestLogger()
 	ob := &bytes.Buffer{}
-	out := l.Out
 	l.SetOutput(ob)
-	defer l.SetOutput(out)
 
 	p := FirewallPacket{
 		ip2int(net.IPv4(1, 2, 3, 4)),
@@ -365,22 +363,21 @@ func TestFirewall_Drop2(t *testing.T) {
 	}
 	h1.CreateRemoteCIDR(&c1)
 
-	fw := NewFirewall(time.Second, time.Minute, time.Hour, &c)
+	fw := NewFirewall(l, time.Second, time.Minute, time.Hour, &c)
 	assert.Nil(t, fw.AddRule(true, fwProtoAny, 0, 0, []string{"default-group", "test-group"}, "", nil, "", ""))
 	cp := cert.NewCAPool()
 
 	// h1/c1 lacks the proper groups
-	assert.Error(t, fw.Drop([]byte{}, p, true, &h1, cp), ErrNoMatchingRule)
+	assert.Error(t, fw.Drop([]byte{}, p, true, &h1, cp, nil), ErrNoMatchingRule)
 	// c has the proper groups
 	resetConntrack(fw)
-	assert.NoError(t, fw.Drop([]byte{}, p, true, &h, cp))
+	assert.NoError(t, fw.Drop([]byte{}, p, true, &h, cp, nil))
 }
 
 func TestFirewall_Drop3(t *testing.T) {
+	l := NewTestLogger()
 	ob := &bytes.Buffer{}
-	out := l.Out
 	l.SetOutput(ob)
-	defer l.SetOutput(out)
 
 	p := FirewallPacket{
 		ip2int(net.IPv4(1, 2, 3, 4)),
@@ -448,26 +445,25 @@ func TestFirewall_Drop3(t *testing.T) {
 	}
 	h3.CreateRemoteCIDR(&c3)
 
-	fw := NewFirewall(time.Second, time.Minute, time.Hour, &c)
+	fw := NewFirewall(l, time.Second, time.Minute, time.Hour, &c)
 	assert.Nil(t, fw.AddRule(true, fwProtoAny, 1, 1, []string{}, "host1", nil, "", ""))
 	assert.Nil(t, fw.AddRule(true, fwProtoAny, 1, 1, []string{}, "", nil, "", "signer-sha"))
 	cp := cert.NewCAPool()
 
 	// c1 should pass because host match
-	assert.NoError(t, fw.Drop([]byte{}, p, true, &h1, cp))
+	assert.NoError(t, fw.Drop([]byte{}, p, true, &h1, cp, nil))
 	// c2 should pass because ca sha match
 	resetConntrack(fw)
-	assert.NoError(t, fw.Drop([]byte{}, p, true, &h2, cp))
+	assert.NoError(t, fw.Drop([]byte{}, p, true, &h2, cp, nil))
 	// c3 should fail because no match
 	resetConntrack(fw)
-	assert.Equal(t, fw.Drop([]byte{}, p, true, &h3, cp), ErrNoMatchingRule)
+	assert.Equal(t, fw.Drop([]byte{}, p, true, &h3, cp, nil), ErrNoMatchingRule)
 }
 
 func TestFirewall_DropConntrackReload(t *testing.T) {
+	l := NewTestLogger()
 	ob := &bytes.Buffer{}
-	out := l.Out
 	l.SetOutput(ob)
-	defer l.SetOutput(out)
 
 	p := FirewallPacket{
 		ip2int(net.IPv4(1, 2, 3, 4)),
@@ -500,35 +496,35 @@ func TestFirewall_DropConntrackReload(t *testing.T) {
 	}
 	h.CreateRemoteCIDR(&c)
 
-	fw := NewFirewall(time.Second, time.Minute, time.Hour, &c)
+	fw := NewFirewall(l, time.Second, time.Minute, time.Hour, &c)
 	assert.Nil(t, fw.AddRule(true, fwProtoAny, 0, 0, []string{"any"}, "", nil, "", ""))
 	cp := cert.NewCAPool()
 
 	// Drop outbound
-	assert.Equal(t, fw.Drop([]byte{}, p, false, &h, cp), ErrNoMatchingRule)
+	assert.Equal(t, fw.Drop([]byte{}, p, false, &h, cp, nil), ErrNoMatchingRule)
 	// Allow inbound
 	resetConntrack(fw)
-	assert.NoError(t, fw.Drop([]byte{}, p, true, &h, cp))
+	assert.NoError(t, fw.Drop([]byte{}, p, true, &h, cp, nil))
 	// Allow outbound because conntrack
-	assert.NoError(t, fw.Drop([]byte{}, p, false, &h, cp))
+	assert.NoError(t, fw.Drop([]byte{}, p, false, &h, cp, nil))
 
 	oldFw := fw
-	fw = NewFirewall(time.Second, time.Minute, time.Hour, &c)
+	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, &c)
 	assert.Nil(t, fw.AddRule(true, fwProtoAny, 10, 10, []string{"any"}, "", nil, "", ""))
 	fw.Conntrack = oldFw.Conntrack
 	fw.rulesVersion = oldFw.rulesVersion + 1
 
 	// Allow outbound because conntrack and new rules allow port 10
-	assert.NoError(t, fw.Drop([]byte{}, p, false, &h, cp))
+	assert.NoError(t, fw.Drop([]byte{}, p, false, &h, cp, nil))
 
 	oldFw = fw
-	fw = NewFirewall(time.Second, time.Minute, time.Hour, &c)
+	fw = NewFirewall(l, time.Second, time.Minute, time.Hour, &c)
 	assert.Nil(t, fw.AddRule(true, fwProtoAny, 11, 11, []string{"any"}, "", nil, "", ""))
 	fw.Conntrack = oldFw.Conntrack
 	fw.rulesVersion = oldFw.rulesVersion + 1
 
 	// Drop outbound because conntrack doesn't match new ruleset
-	assert.Equal(t, fw.Drop([]byte{}, p, false, &h, cp), ErrNoMatchingRule)
+	assert.Equal(t, fw.Drop([]byte{}, p, false, &h, cp, nil), ErrNoMatchingRule)
 }
 
 func BenchmarkLookup(b *testing.B) {
@@ -647,124 +643,126 @@ func Test_parsePort(t *testing.T) {
 }
 
 func TestNewFirewallFromConfig(t *testing.T) {
+	l := NewTestLogger()
 	// Test a bad rule definition
 	c := &cert.NebulaCertificate{}
-	conf := NewConfig()
+	conf := NewConfig(l)
 	conf.Settings["firewall"] = map[interface{}]interface{}{"outbound": "asdf"}
-	_, err := NewFirewallFromConfig(c, conf)
+	_, err := NewFirewallFromConfig(l, c, conf)
 	assert.EqualError(t, err, "firewall.outbound failed to parse, should be an array of rules")
 
 	// Test both port and code
-	conf = NewConfig()
+	conf = NewConfig(l)
 	conf.Settings["firewall"] = map[interface{}]interface{}{"outbound": []interface{}{map[interface{}]interface{}{"port": "1", "code": "2"}}}
-	_, err = NewFirewallFromConfig(c, conf)
+	_, err = NewFirewallFromConfig(l, c, conf)
 	assert.EqualError(t, err, "firewall.outbound rule #0; only one of port or code should be provided")
 
 	// Test missing host, group, cidr, ca_name and ca_sha
-	conf = NewConfig()
+	conf = NewConfig(l)
 	conf.Settings["firewall"] = map[interface{}]interface{}{"outbound": []interface{}{map[interface{}]interface{}{}}}
-	_, err = NewFirewallFromConfig(c, conf)
+	_, err = NewFirewallFromConfig(l, c, conf)
 	assert.EqualError(t, err, "firewall.outbound rule #0; at least one of host, group, cidr, ca_name, or ca_sha must be provided")
 
 	// Test code/port error
-	conf = NewConfig()
+	conf = NewConfig(l)
 	conf.Settings["firewall"] = map[interface{}]interface{}{"outbound": []interface{}{map[interface{}]interface{}{"code": "a", "host": "testh"}}}
-	_, err = NewFirewallFromConfig(c, conf)
+	_, err = NewFirewallFromConfig(l, c, conf)
 	assert.EqualError(t, err, "firewall.outbound rule #0; code was not a number; `a`")
 
 	conf.Settings["firewall"] = map[interface{}]interface{}{"outbound": []interface{}{map[interface{}]interface{}{"port": "a", "host": "testh"}}}
-	_, err = NewFirewallFromConfig(c, conf)
+	_, err = NewFirewallFromConfig(l, c, conf)
 	assert.EqualError(t, err, "firewall.outbound rule #0; port was not a number; `a`")
 
 	// Test proto error
-	conf = NewConfig()
+	conf = NewConfig(l)
 	conf.Settings["firewall"] = map[interface{}]interface{}{"outbound": []interface{}{map[interface{}]interface{}{"code": "1", "host": "testh"}}}
-	_, err = NewFirewallFromConfig(c, conf)
+	_, err = NewFirewallFromConfig(l, c, conf)
 	assert.EqualError(t, err, "firewall.outbound rule #0; proto was not understood; ``")
 
 	// Test cidr parse error
-	conf = NewConfig()
+	conf = NewConfig(l)
 	conf.Settings["firewall"] = map[interface{}]interface{}{"outbound": []interface{}{map[interface{}]interface{}{"code": "1", "cidr": "testh", "proto": "any"}}}
-	_, err = NewFirewallFromConfig(c, conf)
+	_, err = NewFirewallFromConfig(l, c, conf)
 	assert.EqualError(t, err, "firewall.outbound rule #0; cidr did not parse; invalid CIDR address: testh")
 
 	// Test both group and groups
-	conf = NewConfig()
+	conf = NewConfig(l)
 	conf.Settings["firewall"] = map[interface{}]interface{}{"inbound": []interface{}{map[interface{}]interface{}{"port": "1", "proto": "any", "group": "a", "groups": []string{"b", "c"}}}}
-	_, err = NewFirewallFromConfig(c, conf)
+	_, err = NewFirewallFromConfig(l, c, conf)
 	assert.EqualError(t, err, "firewall.inbound rule #0; only one of group or groups should be defined, both provided")
 }
 
 func TestAddFirewallRulesFromConfig(t *testing.T) {
+	l := NewTestLogger()
 	// Test adding tcp rule
-	conf := NewConfig()
+	conf := NewConfig(l)
 	mf := &mockFirewall{}
 	conf.Settings["firewall"] = map[interface{}]interface{}{"outbound": []interface{}{map[interface{}]interface{}{"port": "1", "proto": "tcp", "host": "a"}}}
-	assert.Nil(t, AddFirewallRulesFromConfig(false, conf, mf))
+	assert.Nil(t, AddFirewallRulesFromConfig(l, false, conf, mf))
 	assert.Equal(t, addRuleCall{incoming: false, proto: fwProtoTCP, startPort: 1, endPort: 1, groups: nil, host: "a", ip: nil}, mf.lastCall)
 
 	// Test adding udp rule
-	conf = NewConfig()
+	conf = NewConfig(l)
 	mf = &mockFirewall{}
 	conf.Settings["firewall"] = map[interface{}]interface{}{"outbound": []interface{}{map[interface{}]interface{}{"port": "1", "proto": "udp", "host": "a"}}}
-	assert.Nil(t, AddFirewallRulesFromConfig(false, conf, mf))
+	assert.Nil(t, AddFirewallRulesFromConfig(l, false, conf, mf))
 	assert.Equal(t, addRuleCall{incoming: false, proto: fwProtoUDP, startPort: 1, endPort: 1, groups: nil, host: "a", ip: nil}, mf.lastCall)
 
 	// Test adding icmp rule
-	conf = NewConfig()
+	conf = NewConfig(l)
 	mf = &mockFirewall{}
 	conf.Settings["firewall"] = map[interface{}]interface{}{"outbound": []interface{}{map[interface{}]interface{}{"port": "1", "proto": "icmp", "host": "a"}}}
-	assert.Nil(t, AddFirewallRulesFromConfig(false, conf, mf))
+	assert.Nil(t, AddFirewallRulesFromConfig(l, false, conf, mf))
 	assert.Equal(t, addRuleCall{incoming: false, proto: fwProtoICMP, startPort: 1, endPort: 1, groups: nil, host: "a", ip: nil}, mf.lastCall)
 
 	// Test adding any rule
-	conf = NewConfig()
+	conf = NewConfig(l)
 	mf = &mockFirewall{}
 	conf.Settings["firewall"] = map[interface{}]interface{}{"inbound": []interface{}{map[interface{}]interface{}{"port": "1", "proto": "any", "host": "a"}}}
-	assert.Nil(t, AddFirewallRulesFromConfig(true, conf, mf))
+	assert.Nil(t, AddFirewallRulesFromConfig(l, true, conf, mf))
 	assert.Equal(t, addRuleCall{incoming: true, proto: fwProtoAny, startPort: 1, endPort: 1, groups: nil, host: "a", ip: nil}, mf.lastCall)
 
 	// Test adding rule with ca_sha
-	conf = NewConfig()
+	conf = NewConfig(l)
 	mf = &mockFirewall{}
 	conf.Settings["firewall"] = map[interface{}]interface{}{"inbound": []interface{}{map[interface{}]interface{}{"port": "1", "proto": "any", "ca_sha": "12312313123"}}}
-	assert.Nil(t, AddFirewallRulesFromConfig(true, conf, mf))
+	assert.Nil(t, AddFirewallRulesFromConfig(l, true, conf, mf))
 	assert.Equal(t, addRuleCall{incoming: true, proto: fwProtoAny, startPort: 1, endPort: 1, groups: nil, ip: nil, caSha: "12312313123"}, mf.lastCall)
 
 	// Test adding rule with ca_name
-	conf = NewConfig()
+	conf = NewConfig(l)
 	mf = &mockFirewall{}
 	conf.Settings["firewall"] = map[interface{}]interface{}{"inbound": []interface{}{map[interface{}]interface{}{"port": "1", "proto": "any", "ca_name": "root01"}}}
-	assert.Nil(t, AddFirewallRulesFromConfig(true, conf, mf))
+	assert.Nil(t, AddFirewallRulesFromConfig(l, true, conf, mf))
 	assert.Equal(t, addRuleCall{incoming: true, proto: fwProtoAny, startPort: 1, endPort: 1, groups: nil, ip: nil, caName: "root01"}, mf.lastCall)
 
 	// Test single group
-	conf = NewConfig()
+	conf = NewConfig(l)
 	mf = &mockFirewall{}
 	conf.Settings["firewall"] = map[interface{}]interface{}{"inbound": []interface{}{map[interface{}]interface{}{"port": "1", "proto": "any", "group": "a"}}}
-	assert.Nil(t, AddFirewallRulesFromConfig(true, conf, mf))
+	assert.Nil(t, AddFirewallRulesFromConfig(l, true, conf, mf))
 	assert.Equal(t, addRuleCall{incoming: true, proto: fwProtoAny, startPort: 1, endPort: 1, groups: []string{"a"}, ip: nil}, mf.lastCall)
 
 	// Test single groups
-	conf = NewConfig()
+	conf = NewConfig(l)
 	mf = &mockFirewall{}
 	conf.Settings["firewall"] = map[interface{}]interface{}{"inbound": []interface{}{map[interface{}]interface{}{"port": "1", "proto": "any", "groups": "a"}}}
-	assert.Nil(t, AddFirewallRulesFromConfig(true, conf, mf))
+	assert.Nil(t, AddFirewallRulesFromConfig(l, true, conf, mf))
 	assert.Equal(t, addRuleCall{incoming: true, proto: fwProtoAny, startPort: 1, endPort: 1, groups: []string{"a"}, ip: nil}, mf.lastCall)
 
 	// Test multiple AND groups
-	conf = NewConfig()
+	conf = NewConfig(l)
 	mf = &mockFirewall{}
 	conf.Settings["firewall"] = map[interface{}]interface{}{"inbound": []interface{}{map[interface{}]interface{}{"port": "1", "proto": "any", "groups": []string{"a", "b"}}}}
-	assert.Nil(t, AddFirewallRulesFromConfig(true, conf, mf))
+	assert.Nil(t, AddFirewallRulesFromConfig(l, true, conf, mf))
 	assert.Equal(t, addRuleCall{incoming: true, proto: fwProtoAny, startPort: 1, endPort: 1, groups: []string{"a", "b"}, ip: nil}, mf.lastCall)
 
 	// Test Add error
-	conf = NewConfig()
+	conf = NewConfig(l)
 	mf = &mockFirewall{}
 	mf.nextCallReturn = errors.New("test error")
 	conf.Settings["firewall"] = map[interface{}]interface{}{"inbound": []interface{}{map[interface{}]interface{}{"port": "1", "proto": "any", "host": "a"}}}
-	assert.EqualError(t, AddFirewallRulesFromConfig(true, conf, mf), "firewall.inbound rule #0; `test error`")
+	assert.EqualError(t, AddFirewallRulesFromConfig(l, true, conf, mf), "firewall.inbound rule #0; `test error`")
 }
 
 func TestTCPRTTTracking(t *testing.T) {
@@ -859,17 +857,16 @@ func TestTCPRTTTracking(t *testing.T) {
 }
 
 func TestFirewall_convertRule(t *testing.T) {
+	l := NewTestLogger()
 	ob := &bytes.Buffer{}
-	out := l.Out
 	l.SetOutput(ob)
-	defer l.SetOutput(out)
 
 	// Ensure group array of 1 is converted and a warning is printed
 	c := map[interface{}]interface{}{
 		"group": []interface{}{"group1"},
 	}
 
-	r, err := convertRule(c, "test", 1)
+	r, err := convertRule(l, c, "test", 1)
 	assert.Contains(t, ob.String(), "test rule #1; group was an array with a single value, converting to simple value")
 	assert.Nil(t, err)
 	assert.Equal(t, "group1", r.Group)
@@ -880,7 +877,7 @@ func TestFirewall_convertRule(t *testing.T) {
 		"group": []interface{}{"group1", "group2"},
 	}
 
-	r, err = convertRule(c, "test", 1)
+	r, err = convertRule(l, c, "test", 1)
 	assert.Equal(t, "", ob.String())
 	assert.Error(t, err, "group should contain a single value, an array with more than one entry was provided")
 
@@ -890,7 +887,7 @@ func TestFirewall_convertRule(t *testing.T) {
 		"group": "group1",
 	}
 
-	r, err = convertRule(c, "test", 1)
+	r, err = convertRule(l, c, "test", 1)
 	assert.Nil(t, err)
 	assert.Equal(t, "group1", r.Group)
 }

go.mod

@@ -1,6 +1,6 @@
 module github.com/slackhq/nebula
 
-go 1.12
+go 1.16
 
 require (
 	github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239
@@ -8,12 +8,13 @@ require (
 	github.com/cespare/xxhash/v2 v2.1.1 // indirect
 	github.com/cyberdelia/go-metrics-graphite v0.0.0-20161219230853-39f87cc3b432
 	github.com/flynn/go-shlex v0.0.0-20150515145356-3f9db97f8568 // indirect
-	github.com/flynn/noise v0.0.0-20180327030543-2492fe189ae6
-	github.com/golang/protobuf v1.3.2
+	github.com/flynn/noise v0.0.0-20210331153838-4bdb43be3117
+	github.com/gogo/protobuf v1.3.2
+	github.com/golang/protobuf v1.5.0
+	github.com/google/gopacket v1.1.19
 	github.com/imdario/mergo v0.3.8
 	github.com/kardianos/service v1.1.0
 	github.com/konsorten/go-windows-terminal-sequences v1.0.2 // indirect
-	github.com/kr/pretty v0.1.0 // indirect
 	github.com/miekg/dns v1.1.25
 	github.com/nbrownus/go-metrics-prometheus v0.0.0-20180622211546-6e6d5173d99c
 	github.com/prometheus/client_golang v1.2.1
@@ -21,13 +22,14 @@ require (
 	github.com/prometheus/procfs v0.0.8 // indirect
 	github.com/rcrowley/go-metrics v0.0.0-20190826022208-cac0b30c2563
 	github.com/sirupsen/logrus v1.4.2
+	github.com/skip2/go-qrcode v0.0.0-20200617195104-da1b6568686e
 	github.com/songgao/water v0.0.0-20190725173103-fd331bda3f4b
 	github.com/stretchr/testify v1.6.1
 	github.com/vishvananda/netlink v1.0.1-0.20190522153524-00009fb8606a
 	github.com/vishvananda/netns v0.0.0-20191106174202-0a2b9b5464df // indirect
-	golang.org/x/crypto v0.0.0-20200220183623-bac4c82f6975
-	golang.org/x/net v0.0.0-20191209160850-c0dbc17a3553
-	golang.org/x/sys v0.0.0-20191210023423-ac6580df4449
-	gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 // indirect
+	golang.org/x/crypto v0.0.0-20210322153248-0c34fe9e7dc2
+	golang.org/x/net v0.0.0-20210226172049-e18ecbb05110
+	golang.org/x/sys v0.0.0-20201119102817-f84b799fce68
+	google.golang.org/protobuf v1.26.0
 	gopkg.in/yaml.v2 v2.2.7
 )

go.sum

@@ -7,11 +7,9 @@ github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239/go.mod h1:2FmKhYU
 github.com/armon/go-radix v1.0.0 h1:F4z6KzEeeQIMeLFa97iZU6vupzoecKdU5TX24SNppXI=
 github.com/armon/go-radix v1.0.0/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
-github.com/beorn7/perks v1.0.0 h1:HWo1m869IqiPhD389kmkxeTalrjNbbJTC8LXupb+sl0=
 github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
-github.com/cespare/xxhash/v2 v2.1.0 h1:yTUvW7Vhb89inJ+8irsUqiWjh8iT6sQPZiQzI6ReGkA=
 github.com/cespare/xxhash/v2 v2.1.0/go.mod h1:dgIUBU3pDso/gPgZ1osOZ0iQf77oPR28Tjxl5dIMyVM=
 github.com/cespare/xxhash/v2 v2.1.1 h1:6MnRN8NT7+YBpUIWxHtefFZOKTAPgGjpQSxqLNn0+qY=
 github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
@@ -22,38 +20,43 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/flynn/go-shlex v0.0.0-20150515145356-3f9db97f8568 h1:BHsljHzVlRcyQhjrss6TZTdY2VfCqZPbv5k3iBFa2ZQ=
 github.com/flynn/go-shlex v0.0.0-20150515145356-3f9db97f8568/go.mod h1:xEzjJPgXI435gkrCt3MPfRiAkVrwSbHsst4LCFVfpJc=
-github.com/flynn/noise v0.0.0-20180327030543-2492fe189ae6 h1:u/UEqS66A5ckRmS4yNpjmVH56sVtS/RfclBAYocb4as=
-github.com/flynn/noise v0.0.0-20180327030543-2492fe189ae6/go.mod h1:1i71OnUq3iUe1ma7Lr6yG6/rjvM3emb6yoL7xLFzcVQ=
+github.com/flynn/noise v0.0.0-20210331153838-4bdb43be3117 h1:Dxhvhray2DpvNnrZEnoGG5rz238fUeQTh4sdzTr+d1U=
+github.com/flynn/noise v0.0.0-20210331153838-4bdb43be3117/go.mod h1:xbMo+0i6+IGbYdJhF31t2eR1BIU0CYc12+BNAKwUTag=
 github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
 github.com/go-kit/kit v0.9.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
 github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9GBnD5lWE=
 github.com/go-logfmt/logfmt v0.4.0/go.mod h1:3RMwSq7FuexP4Kalkev3ejPJsZTpXXBr9+V4qmtdjCk=
 github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
 github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
+github.com/gogo/protobuf v1.3.2 h1:Ov1cvc58UF3b5XjBnZv7+opcTcQFZebYjWzi34vdm4Q=
+github.com/gogo/protobuf v1.3.2/go.mod h1:P1XiOD3dCwIKUDQYPy72D8LYyHL2YPYrpS2s69NZV8Q=
 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
-github.com/golang/protobuf v1.3.1 h1:YF8+flBXS5eO826T4nzqPrxfhQThhXl0YzfuUPu4SBg=
 github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
-github.com/golang/protobuf v1.3.2 h1:6nsPYzhq5kReh6QImI3k5qWzO4PEbvbIW2cwSfR/6xs=
 github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/golang/protobuf v1.5.0 h1:LUVKkCeviFUMKqHa4tXIIij/lbhnMbP7Fn5wKdKkRh4=
+github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
 github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
-github.com/google/go-cmp v0.3.1 h1:Xye71clBPdm5HgqGwUkwhbynsUJZhDbS20FvLhQ2izg=
 github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
+github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
+github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
+github.com/google/gopacket v1.1.19 h1:ves8RnFZPGiFnTS0uPQStjwru6uO6h+nlr9j6fL7kF8=
+github.com/google/gopacket v1.1.19/go.mod h1:iJ8V8n6KS+z2U1A8pUwu8bW5SyEMkXJB8Yo/Vo+TKTo=
 github.com/imdario/mergo v0.3.8 h1:CGgOkSJeqMRmt0D9XLWExdT4m4F1vd3FV3VPt+0VxkQ=
 github.com/imdario/mergo v0.3.8/go.mod h1:2EnlNZ0deacrJVfApfmtdGgDfMuh/nq6Ok1EcJh5FfA=
 github.com/json-iterator/go v1.1.6/go.mod h1:+SdeFBvtyEkXs7REEP0seUULqWtbJapLOCVDaaPEHmU=
 github.com/json-iterator/go v1.1.7/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
 github.com/julienschmidt/httprouter v1.2.0/go.mod h1:SYymIcj16QtmaHHD7aYtjjsJG7VTCxuUUipMqKk8s4w=
-github.com/kardianos/service v1.0.0 h1:HgQS3mFfOlyntWX8Oke98JcJLqt1DBcHR4kxShpYef0=
-github.com/kardianos/service v1.0.0/go.mod h1:8CzDhVuCuugtsHyZoTvsOBuvonN/UDBvl0kH+BUxvbo=
 github.com/kardianos/service v1.1.0 h1:QV2SiEeWK42P0aEmGcsAgjApw/lRxkwopvT+Gu6t1/0=
 github.com/kardianos/service v1.1.0/go.mod h1:RrJI2xn5vve/r32U5suTbeaSGoMU6GbNPoj36CVYcHc=
+github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI2bnpBCr8=
+github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
 github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
 github.com/konsorten/go-windows-terminal-sequences v1.0.2 h1:DB17ag19krx9CFsz4o3enTrPXyIXCl+2iCXH/aMAp9s=
 github.com/konsorten/go-windows-terminal-sequences v1.0.2/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
 github.com/kr/logfmt v0.0.0-20140226030751-b84e30acd515/go.mod h1:+0opPa2QZZtGFBFZlji/RkVcI2GknAs/DXo4wKdlNEc=
-github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
-github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
+github.com/kr/pretty v0.2.1 h1:Fmg33tUaq4/8ym9TJN1x7sLJnHVwhP33CNkpYV/7rwI=
+github.com/kr/pretty v0.2.1/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfnI=
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
@@ -62,10 +65,8 @@ github.com/matttproud/golang_protobuf_extensions v1.0.1/go.mod h1:D8He9yQNgCq6Z5
 github.com/miekg/dns v1.1.25 h1:dFwPR6SfLtrSwgDcIq2bcU/gVutB4sNApq2HBdqcakg=
 github.com/miekg/dns v1.1.25/go.mod h1:bPDLeHnStXmXAq1m/Ch/hvfNHr14JKNPMBo3VZKjuso=
 github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
-github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd h1:TRLaZ9cD/w8PVh93nsPXa1VrQ6jlwL5oN8l14QlcNfg=
 github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
 github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
-github.com/modern-go/reflect2 v1.0.1 h1:9f412s+6RmYXLWZSEzVVgPGK7C2PphHj5RJrvfx9AWI=
 github.com/modern-go/reflect2 v1.0.1/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
 github.com/mwitkow/go-conntrack v0.0.0-20161129095857-cc309e4a2223/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
 github.com/nbrownus/go-metrics-prometheus v0.0.0-20180622211546-6e6d5173d99c h1:G/mfx/MWYuaaGlHkZQBBXFAJiYnRt/GaOVxnRHjlxg4=
@@ -79,12 +80,10 @@ github.com/prometheus/client_golang v1.0.0/go.mod h1:db9x61etRT2tGnBNRi70OPL5Fsn
 github.com/prometheus/client_golang v1.2.1 h1:JnMpQc6ppsNgw9QPAGF6Dod479itz7lvlsMzzNayLOI=
 github.com/prometheus/client_golang v1.2.1/go.mod h1:XMU6Z2MjaRKVu/dC1qupJI9SiNkDYzz3xecMgSW/F+U=
 github.com/prometheus/client_model v0.0.0-20180712105110-5c3871d89910/go.mod h1:MbSGuTsp3dbXC40dX6PRTWyKYBIrTGTE9sqQNg2J8bo=
-github.com/prometheus/client_model v0.0.0-20190129233127-fd36f4220a90 h1:S/YWwWx/RA8rT8tKFRuGUZhuA90OyIBpPCXkcbwU8DE=
 github.com/prometheus/client_model v0.0.0-20190129233127-fd36f4220a90/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
 github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
 github.com/prometheus/client_model v0.0.0-20191202183732-d1d2010b5bee h1:iBZPTYkGLvdu6+A5TsMUJQkQX9Ad4aCEnSQtdxPuTCQ=
 github.com/prometheus/client_model v0.0.0-20191202183732-d1d2010b5bee/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
-github.com/prometheus/common v0.4.1 h1:K0MGApIoQvMw27RTdJkPbr3JZ7DNbtxQNyi5STVM6Kw=
 github.com/prometheus/common v0.4.1/go.mod h1:TNfzLD0ON7rHzMJeJkieUDPYmFC7Snx/y86RQel1bk4=
 github.com/prometheus/common v0.7.0 h1:L+1lyG48J1zAQXA3RBX/nG/B3gjlHq0zTt2tlbJLyCY=
 github.com/prometheus/common v0.7.0/go.mod h1:DjGbpBbp5NYNiECxcL/VnbXCCaQpKd3tt26CguLLsqA=
@@ -98,12 +97,13 @@ github.com/rcrowley/go-metrics v0.0.0-20190826022208-cac0b30c2563/go.mod h1:bCqn
 github.com/sirupsen/logrus v1.2.0/go.mod h1:LxeOpSwHxABJmUn/MG1IvRgCAasNZTLOkJPxbbu5VWo=
 github.com/sirupsen/logrus v1.4.2 h1:SPIRibHv4MatM3XXNO2BJeFLZwZ2LvZgfQ5+UNI2im4=
 github.com/sirupsen/logrus v1.4.2/go.mod h1:tLMulIdttU9McNUspp0xgXVQah82FyeX6MwdIuYE2rE=
+github.com/skip2/go-qrcode v0.0.0-20200617195104-da1b6568686e h1:MRM5ITcdelLK2j1vwZ3Je0FKVCfqOLp5zO6trqMLYs0=
+github.com/skip2/go-qrcode v0.0.0-20200617195104-da1b6568686e/go.mod h1:XV66xRDqSt+GTGFMVlhk3ULuV0y9ZmzeVGR4mloJI3M=
 github.com/songgao/water v0.0.0-20190725173103-fd331bda3f4b h1:+y4hCMc/WKsDbAPsOQZgBSaSZ26uh2afyaWeVg/3s/c=
 github.com/songgao/water v0.0.0-20190725173103-fd331bda3f4b/go.mod h1:P5HUIBuIWKbyjl083/loAegFkfbFNx5i2qEP4CNbm7E=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
-github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
 github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
@@ -111,24 +111,34 @@ github.com/vishvananda/netlink v1.0.1-0.20190522153524-00009fb8606a h1:Bt1IVPhiC
 github.com/vishvananda/netlink v1.0.1-0.20190522153524-00009fb8606a/go.mod h1:+SR5DhBJrl6ZM7CoCKvpw5BKroDKQ+PJqOg65H/2ktk=
 github.com/vishvananda/netns v0.0.0-20191106174202-0a2b9b5464df h1:OviZH7qLw/7ZovXvuNyL3XQl8UFofeikI1NW1Gypu7k=
 github.com/vishvananda/netns v0.0.0-20191106174202-0a2b9b5464df/go.mod h1:JP3t17pCcGlemwknint6hfoeCVQrEMVwxRLRjXpq+BU=
+github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
+github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20190923035154-9ee001bba392/go.mod h1:/lpIB1dKB+9EgE3H3cr1v9wB50oz8l4C4h62xy7jSTY=
-golang.org/x/crypto v0.0.0-20200220183623-bac4c82f6975 h1:/Tl7pH94bvbAAHBdZJT947M/+gp0+CqQXDtMRC0fseo=
-golang.org/x/crypto v0.0.0-20200220183623-bac4c82f6975/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
+golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
+golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
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 golang.org/x/net v0.0.0-20181114220301-adae6a3d119a/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190613194153-d28f0bde5980/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190923162816-aa69164e4478/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.0.0-20191209160850-c0dbc17a3553 h1:efeOvDhwQ29Dj3SdAV/MJf8oukgn+8D8WgaCaRMchF8=
-golang.org/x/net v0.0.0-20191209160850-c0dbc17a3553/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
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 golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20190423024810-112230192c58 h1:8gQV6CLnAEikrhgkHFbMAEhagSSnXWGV915qUMm9mrU=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e h1:vcxGaoTs7kV8m5Np9uUNQin4BrLOthgV7252N8V+FwY=
 golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9 h1:SQFwaSi55rU7vdNs9Yr0Z324VNlrF+0wMqRXT4St8ck=
+golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20181116152217-5ac8a444bdc5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190204203706-41f3e6584952/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
@@ -138,19 +148,33 @@ golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20190922100055-0a153f010e69/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190924154521-2837fb4f24fe/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191010194322-b09406accb47/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20191210023423-ac6580df4449 h1:gSbV7h1NRL2G1xTg/owz62CST1oJBmxy4QpMMregXVQ=
-golang.org/x/sys v0.0.0-20191210023423-ac6580df4449/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68 h1:nxC68pudNYkKU6jWhgrqdreuFiOQWj1Fs7T3VrH4Pjw=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1 h1:v+OssWQX+hTHEmOBgwxdZxK4zHq3yOs8F9J7mk0PY8E=
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 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20190907020128-2ca718005c18/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
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 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
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-gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.7 h1:VUgggvou5XRW9mHwD/yXxIYSMtY0zoKQf/v226p2nyo=
 gopkg.in/yaml.v2 v2.2.7/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

handler.go

@@ -1,83 +0,0 @@
-package nebula
-
-func (f *Interface) newHook(w func([]byte) error) InsideHandler {
-	fn := func(hostInfo *HostInfo, ci *ConnectionState, addr *udpAddr, header *Header, out []byte, packet []byte, fwPacket *FirewallPacket, nb []byte) {
-		f.decryptTo(w, hostInfo, header.MessageCounter, out, packet, fwPacket, nb)
-	}
-	return f.encrypted(fn)
-}
-
-func (f *Interface) encrypted(h InsideHandler) InsideHandler {
-	return func(hostInfo *HostInfo, ci *ConnectionState, addr *udpAddr, header *Header, out []byte, packet []byte, fwPacket *FirewallPacket, nb []byte) {
-		if !f.handleEncrypted(ci, addr, header) {
-			return
-		}
-
-		h(hostInfo, ci, addr, header, out, packet, fwPacket, nb)
-
-		f.handleHostRoaming(hostInfo, addr)
-		f.connectionManager.In(hostInfo.hostId)
-	}
-}
-
-func (f *Interface) rxMetrics(h InsideHandler) InsideHandler {
-	return func(hostInfo *HostInfo, ci *ConnectionState, addr *udpAddr, header *Header, out []byte, packet []byte, fwPacket *FirewallPacket, nb []byte) {
-		f.messageMetrics.Rx(header.Type, header.Subtype, 1)
-		h(hostInfo, ci, addr, header, out, packet, fwPacket, nb)
-	}
-}
-
-func (f *Interface) handleMessagePacket(hostInfo *HostInfo, ci *ConnectionState, addr *udpAddr, header *Header, out []byte, packet []byte, fwPacket *FirewallPacket, nb []byte) {
-	f.decryptTo(f.inside.WriteRaw, hostInfo, header.MessageCounter, out, packet, fwPacket, nb)
-}
-
-func (f *Interface) handleLighthousePacket(hostInfo *HostInfo, ci *ConnectionState, addr *udpAddr, header *Header, out []byte, packet []byte, fwPacket *FirewallPacket, nb []byte) {
-	d, err := f.decrypt(hostInfo, header.MessageCounter, out, packet, header, nb)
-	if err != nil {
-		hostInfo.logger().WithError(err).WithField("udpAddr", addr).
-			WithField("packet", packet).
-			Error("Failed to decrypt lighthouse packet")
-
-		//TODO: maybe after build 64 is out? 06/14/2018 - NB
-		//f.sendRecvError(net.Addr(addr), header.RemoteIndex)
-		return
-	}
-
-	f.lightHouse.HandleRequest(addr, hostInfo.hostId, d, hostInfo.GetCert(), f)
-}
-
-func (f *Interface) handleTestPacket(hostInfo *HostInfo, ci *ConnectionState, addr *udpAddr, header *Header, out []byte, packet []byte, fwPacket *FirewallPacket, nb []byte) {
-	d, err := f.decrypt(hostInfo, header.MessageCounter, out, packet, header, nb)
-	if err != nil {
-		hostInfo.logger().WithError(err).WithField("udpAddr", addr).
-			WithField("packet", packet).
-			Error("Failed to decrypt test packet")
-
-		//TODO: maybe after build 64 is out? 06/14/2018 - NB
-		//f.sendRecvError(net.Addr(addr), header.RemoteIndex)
-		return
-	}
-
-	if header.Subtype == testRequest {
-		// This testRequest might be from TryPromoteBest, so we should roam
-		// to the new IP address before responding
-		f.handleHostRoaming(hostInfo, addr)
-		f.send(test, testReply, ci, hostInfo, hostInfo.remote, d, nb, out)
-	}
-}
-
-func (f *Interface) handleHandshakePacket(hostInfo *HostInfo, ci *ConnectionState, addr *udpAddr, header *Header, out []byte, packet []byte, fwPacket *FirewallPacket, nb []byte) {
-	HandleIncomingHandshake(f, addr, packet, header, hostInfo)
-}
-
-func (f *Interface) handleRecvErrorPacket(hostInfo *HostInfo, ci *ConnectionState, addr *udpAddr, header *Header, out []byte, packet []byte, fwPacket *FirewallPacket, nb []byte) {
-	// TODO: Remove this with recv_error deprecation
-	f.handleRecvError(addr, header)
-}
-
-func (f *Interface) handleCloseTunnelPacket(hostInfo *HostInfo, ci *ConnectionState, addr *udpAddr, header *Header, out []byte, packet []byte, fwPacket *FirewallPacket, nb []byte) {
-	hostInfo.logger().WithField("udpAddr", addr).
-		Info("Close tunnel received, tearing down.")
-
-	f.closeTunnel(hostInfo)
-}

handshake.go

@@ -6,31 +6,23 @@ const (
 )
 
 func HandleIncomingHandshake(f *Interface, addr *udpAddr, packet []byte, h *Header, hostinfo *HostInfo) {
-	newHostinfo, _ := f.handshakeManager.QueryIndex(h.RemoteIndex)
-	//TODO: For stage 1 we won't have hostinfo yet but stage 2 and above would require it, this check may be helpful in those cases
-	//if err != nil {
-	//	l.WithError(err).WithField("udpAddr", addr).Error("Error while finding host info for handshake message")
-	//	return
-	//}
-
-	if !f.lightHouse.remoteAllowList.Allow(udp2ipInt(addr)) {
-		l.WithField("udpAddr", addr).Debug("lighthouse.remote_allow_list denied incoming handshake")
+	if !f.lightHouse.remoteAllowList.Allow(addr.IP) {
+		f.l.WithField("udpAddr", addr).Debug("lighthouse.remote_allow_list denied incoming handshake")
 		return
 	}
 
-	tearDown := false
 	switch h.Subtype {
 	case handshakeIXPSK0:
 		switch h.MessageCounter {
 		case 1:
-			tearDown = ixHandshakeStage1(f, addr, newHostinfo, packet, h)
+			ixHandshakeStage1(f, addr, packet, h)
 		case 2:
-			tearDown = ixHandshakeStage2(f, addr, newHostinfo, packet, h)
+			newHostinfo, _ := f.handshakeManager.QueryIndex(h.RemoteIndex)
+			tearDown := ixHandshakeStage2(f, addr, newHostinfo, packet, h)
+			if tearDown && newHostinfo != nil {
+				f.handshakeManager.DeleteHostInfo(newHostinfo)
+			}
 		}
 	}
 
-	if tearDown && newHostinfo != nil {
-		f.handshakeManager.DeleteIndex(newHostinfo.localIndexId)
-		f.handshakeManager.DeleteVpnIP(newHostinfo.hostId)
-	}
 }

handshake_ix.go

@@ -1,7 +1,6 @@
 package nebula
 
 import (
-	"bytes"
 	"sync/atomic"
 	"time"
 
@@ -15,28 +14,24 @@ import (
 // Sending is done by the handshake manager
 func ixHandshakeStage0(f *Interface, vpnIp uint32, hostinfo *HostInfo) {
 	// This queries the lighthouse if we don't know a remote for the host
+	// We do it here to provoke the lighthouse to preempt our timer wheel and trigger the stage 1 packet to send
+	// more quickly, effect is a quicker handshake.
 	if hostinfo.remote == nil {
-		ips, err := f.lightHouse.Query(vpnIp, f)
-		if err != nil {
-			//l.Debugln(err)
-		}
-		for _, ip := range ips {
-			hostinfo.AddRemote(ip)
-		}
+		f.lightHouse.QueryServer(vpnIp, f)
 	}
 
-	myIndex, err := generateIndex()
+	err := f.handshakeManager.AddIndexHostInfo(hostinfo)
 	if err != nil {
-		l.WithError(err).WithField("vpnIp", IntIp(vpnIp)).
+		f.l.WithError(err).WithField("vpnIp", IntIp(vpnIp)).
 			WithField("handshake", m{"stage": 0, "style": "ix_psk0"}).Error("Failed to generate index")
 		return
 	}
+
 	ci := hostinfo.ConnectionState
-	f.handshakeManager.AddIndexHostInfo(myIndex, hostinfo)
 
 	hsProto := &NebulaHandshakeDetails{
-		InitiatorIndex: myIndex,
-		Time:           uint64(time.Now().Unix()),
+		InitiatorIndex: hostinfo.localIndexId,
+		Time:           uint64(time.Now().UnixNano()),
 		Cert:           ci.certState.rawCertificateNoKey,
 	}
 
@@ -48,240 +43,264 @@ func ixHandshakeStage0(f *Interface, vpnIp uint32, hostinfo *HostInfo) {
 	hsBytes, err = proto.Marshal(hs)
 
 	if err != nil {
-		l.WithError(err).WithField("vpnIp", IntIp(vpnIp)).
+		f.l.WithError(err).WithField("vpnIp", IntIp(vpnIp)).
 			WithField("handshake", m{"stage": 0, "style": "ix_psk0"}).Error("Failed to marshal handshake message")
 		return
 	}
 
 	header := HeaderEncode(make([]byte, HeaderLen), Version, uint8(handshake), handshakeIXPSK0, 0, 1)
-	atomic.AddUint64(ci.messageCounter, 1)
+	atomic.AddUint64(&ci.atomicMessageCounter, 1)
 
 	msg, _, _, err := ci.H.WriteMessage(header, hsBytes)
 	if err != nil {
-		l.WithError(err).WithField("vpnIp", IntIp(vpnIp)).
+		f.l.WithError(err).WithField("vpnIp", IntIp(vpnIp)).
 			WithField("handshake", m{"stage": 0, "style": "ix_psk0"}).Error("Failed to call noise.WriteMessage")
 		return
 	}
 
+	// We are sending handshake packet 1, so we don't expect to receive
+	// handshake packet 1 from the responder
+	ci.window.Update(f.l, 1)
+
 	hostinfo.HandshakePacket[0] = msg
 	hostinfo.HandshakeReady = true
 	hostinfo.handshakeStart = time.Now()
-
 }
 
-func ixHandshakeStage1(f *Interface, addr *udpAddr, hostinfo *HostInfo, packet []byte, h *Header) bool {
-	var ip uint32
-	if h.RemoteIndex == 0 {
-		ci := f.newConnectionState(false, noise.HandshakeIX, []byte{}, 0)
-		// Mark packet 1 as seen so it doesn't show up as missed
-		ci.window.Update(1)
+func ixHandshakeStage1(f *Interface, addr *udpAddr, packet []byte, h *Header) {
+	ci := f.newConnectionState(f.l, false, noise.HandshakeIX, []byte{}, 0)
+	// Mark packet 1 as seen so it doesn't show up as missed
+	ci.window.Update(f.l, 1)
 
-		msg, _, _, err := ci.H.ReadMessage(nil, packet[HeaderLen:])
-		if err != nil {
-			l.WithError(err).WithField("udpAddr", addr).
-				WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).Error("Failed to call noise.ReadMessage")
-			return true
-		}
+	msg, _, _, err := ci.H.ReadMessage(nil, packet[HeaderLen:])
+	if err != nil {
+		f.l.WithError(err).WithField("udpAddr", addr).
+			WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).Error("Failed to call noise.ReadMessage")
+		return
+	}
 
-		hs := &NebulaHandshake{}
-		err = proto.Unmarshal(msg, hs)
-		/*
-			l.Debugln("GOT INDEX: ", hs.Details.InitiatorIndex)
-		*/
-		if err != nil || hs.Details == nil {
-			l.WithError(err).WithField("udpAddr", addr).
-				WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).Error("Failed unmarshal handshake message")
-			return true
-		}
+	hs := &NebulaHandshake{}
+	err = proto.Unmarshal(msg, hs)
+	/*
+		l.Debugln("GOT INDEX: ", hs.Details.InitiatorIndex)
+	*/
+	if err != nil || hs.Details == nil {
+		f.l.WithError(err).WithField("udpAddr", addr).
+			WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).Error("Failed unmarshal handshake message")
+		return
+	}
 
-		hostinfo, _ := f.handshakeManager.pendingHostMap.QueryReverseIndex(hs.Details.InitiatorIndex)
-		if hostinfo != nil && bytes.Equal(hostinfo.HandshakePacket[0], packet[HeaderLen:]) {
-			if msg, ok := hostinfo.HandshakePacket[2]; ok {
-				f.messageMetrics.Tx(handshake, NebulaMessageSubType(msg[1]), 1)
-				err := f.outside.WriteTo(msg, addr)
-				if err != nil {
-					l.WithField("vpnIp", IntIp(hostinfo.hostId)).WithField("udpAddr", addr).
-						WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).WithField("cached", true).
-						WithError(err).Error("Failed to send handshake message")
-				} else {
-					l.WithField("vpnIp", IntIp(hostinfo.hostId)).WithField("udpAddr", addr).
-						WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).WithField("cached", true).
-						Info("Handshake message sent")
-				}
-				return false
-			}
+	remoteCert, err := RecombineCertAndValidate(ci.H, hs.Details.Cert, f.caPool)
+	if err != nil {
+		f.l.WithError(err).WithField("udpAddr", addr).
+			WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).WithField("cert", remoteCert).
+			Info("Invalid certificate from host")
+		return
+	}
+	vpnIP := ip2int(remoteCert.Details.Ips[0].IP)
+	certName := remoteCert.Details.Name
+	fingerprint, _ := remoteCert.Sha256Sum()
 
-			l.WithField("vpnIp", IntIp(hostinfo.hostId)).WithField("udpAddr", addr).
-				WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).WithField("cached", true).
-				WithField("packets", hostinfo.HandshakePacket).
-				Error("Seen this handshake packet already but don't have a cached packet to return")
-		}
-
-		remoteCert, err := RecombineCertAndValidate(ci.H, hs.Details.Cert)
-		if err != nil {
-			l.WithError(err).WithField("udpAddr", addr).
-				WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).WithField("cert", remoteCert).
-				Info("Invalid certificate from host")
-			return true
-		}
-		vpnIP := ip2int(remoteCert.Details.Ips[0].IP)
-		certName := remoteCert.Details.Name
-		fingerprint, _ := remoteCert.Sha256Sum()
-
-		myIndex, err := generateIndex()
-		if err != nil {
-			l.WithError(err).WithField("vpnIp", IntIp(vpnIP)).WithField("udpAddr", addr).
-				WithField("certName", certName).
-				WithField("fingerprint", fingerprint).
-				WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).Error("Failed to generate index")
-			return true
-		}
-
-		hostinfo, err = f.handshakeManager.AddIndex(myIndex, ci)
-		if err != nil {
-			l.WithError(err).WithField("vpnIp", IntIp(vpnIP)).WithField("udpAddr", addr).
-				WithField("certName", certName).
-				WithField("fingerprint", fingerprint).
-				WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).Error("Error adding index to connection manager")
-
-			return true
-		}
-		l.WithField("vpnIp", IntIp(vpnIP)).WithField("udpAddr", addr).
+	if vpnIP == ip2int(f.certState.certificate.Details.Ips[0].IP) {
+		f.l.WithField("vpnIp", IntIp(vpnIP)).WithField("udpAddr", addr).
 			WithField("certName", certName).
 			WithField("fingerprint", fingerprint).
-			WithField("initiatorIndex", hs.Details.InitiatorIndex).WithField("responderIndex", hs.Details.ResponderIndex).
-			WithField("remoteIndex", h.RemoteIndex).WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).
-			Info("Handshake message received")
+			WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).Error("Refusing to handshake with myself")
+		return
+	}
 
-		hostinfo.remoteIndexId = hs.Details.InitiatorIndex
-		hs.Details.ResponderIndex = myIndex
-		hs.Details.Cert = ci.certState.rawCertificateNoKey
+	myIndex, err := generateIndex(f.l)
+	if err != nil {
+		f.l.WithError(err).WithField("vpnIp", IntIp(vpnIP)).WithField("udpAddr", addr).
+			WithField("certName", certName).
+			WithField("fingerprint", fingerprint).
+			WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).Error("Failed to generate index")
+		return
+	}
 
-		hsBytes, err := proto.Marshal(hs)
-		if err != nil {
-			l.WithError(err).WithField("vpnIp", IntIp(hostinfo.hostId)).WithField("udpAddr", addr).
+	hostinfo := &HostInfo{
+		ConnectionState:   ci,
+		localIndexId:      myIndex,
+		remoteIndexId:     hs.Details.InitiatorIndex,
+		hostId:            vpnIP,
+		HandshakePacket:   make(map[uint8][]byte, 0),
+		lastHandshakeTime: hs.Details.Time,
+	}
+
+	hostinfo.Lock()
+	defer hostinfo.Unlock()
+
+	f.l.WithField("vpnIp", IntIp(vpnIP)).WithField("udpAddr", addr).
+		WithField("certName", certName).
+		WithField("fingerprint", fingerprint).
+		WithField("initiatorIndex", hs.Details.InitiatorIndex).WithField("responderIndex", hs.Details.ResponderIndex).
+		WithField("remoteIndex", h.RemoteIndex).WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).
+		Info("Handshake message received")
+
+	hs.Details.ResponderIndex = myIndex
+	hs.Details.Cert = ci.certState.rawCertificateNoKey
+	// Update the time in case their clock is way off from ours
+	hs.Details.Time = uint64(time.Now().UnixNano())
+
+	hsBytes, err := proto.Marshal(hs)
+	if err != nil {
+		f.l.WithError(err).WithField("vpnIp", IntIp(hostinfo.hostId)).WithField("udpAddr", addr).
+			WithField("certName", certName).
+			WithField("fingerprint", fingerprint).
+			WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).Error("Failed to marshal handshake message")
+		return
+	}
+
+	header := HeaderEncode(make([]byte, HeaderLen), Version, uint8(handshake), handshakeIXPSK0, hs.Details.InitiatorIndex, 2)
+	msg, dKey, eKey, err := ci.H.WriteMessage(header, hsBytes)
+	if err != nil {
+		f.l.WithError(err).WithField("vpnIp", IntIp(hostinfo.hostId)).WithField("udpAddr", addr).
+			WithField("certName", certName).
+			WithField("fingerprint", fingerprint).
+			WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).Error("Failed to call noise.WriteMessage")
+		return
+	} else if dKey == nil || eKey == nil {
+		f.l.WithField("vpnIp", IntIp(hostinfo.hostId)).WithField("udpAddr", addr).
+			WithField("certName", certName).
+			WithField("fingerprint", fingerprint).
+			WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).Error("Noise did not arrive at a key")
+		return
+	}
+
+	hostinfo.HandshakePacket[0] = make([]byte, len(packet[HeaderLen:]))
+	copy(hostinfo.HandshakePacket[0], packet[HeaderLen:])
+
+	// Regardless of whether you are the sender or receiver, you should arrive here
+	// and complete standing up the connection.
+	hostinfo.HandshakePacket[2] = make([]byte, len(msg))
+	copy(hostinfo.HandshakePacket[2], msg)
+
+	// We are sending handshake packet 2, so we don't expect to receive
+	// handshake packet 2 from the initiator.
+	ci.window.Update(f.l, 2)
+
+	ci.peerCert = remoteCert
+	ci.dKey = NewNebulaCipherState(dKey)
+	ci.eKey = NewNebulaCipherState(eKey)
+
+	hostinfo.remotes = f.lightHouse.QueryCache(vpnIP)
+	hostinfo.SetRemote(addr)
+	hostinfo.CreateRemoteCIDR(remoteCert)
+
+	// Only overwrite existing record if we should win the handshake race
+	overwrite := vpnIP > ip2int(f.certState.certificate.Details.Ips[0].IP)
+	existing, err := f.handshakeManager.CheckAndComplete(hostinfo, 0, overwrite, f)
+	if err != nil {
+		switch err {
+		case ErrAlreadySeen:
+			msg = existing.HandshakePacket[2]
+			f.messageMetrics.Tx(handshake, NebulaMessageSubType(msg[1]), 1)
+			err := f.outside.WriteTo(msg, addr)
+			if err != nil {
+				f.l.WithField("vpnIp", IntIp(existing.hostId)).WithField("udpAddr", addr).
+					WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).WithField("cached", true).
+					WithError(err).Error("Failed to send handshake message")
+			} else {
+				f.l.WithField("vpnIp", IntIp(existing.hostId)).WithField("udpAddr", addr).
+					WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).WithField("cached", true).
+					Info("Handshake message sent")
+			}
+			return
+		case ErrExistingHostInfo:
+			// This means there was an existing tunnel and this handshake was older than the one we are currently based on
+			f.l.WithField("vpnIp", IntIp(vpnIP)).WithField("udpAddr", addr).
 				WithField("certName", certName).
+				WithField("oldHandshakeTime", existing.lastHandshakeTime).
+				WithField("newHandshakeTime", hostinfo.lastHandshakeTime).
 				WithField("fingerprint", fingerprint).
-				WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).Error("Failed to marshal handshake message")
-			return true
-		}
+				WithField("initiatorIndex", hs.Details.InitiatorIndex).WithField("responderIndex", hs.Details.ResponderIndex).
+				WithField("remoteIndex", h.RemoteIndex).WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).
+				Info("Handshake too old")
 
-		header := HeaderEncode(make([]byte, HeaderLen), Version, uint8(handshake), handshakeIXPSK0, hs.Details.InitiatorIndex, 2)
-		msg, dKey, eKey, err := ci.H.WriteMessage(header, hsBytes)
-		if err != nil {
-			l.WithError(err).WithField("vpnIp", IntIp(hostinfo.hostId)).WithField("udpAddr", addr).
-				WithField("certName", certName).
-				WithField("fingerprint", fingerprint).
-				WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).Error("Failed to call noise.WriteMessage")
-			return true
-		}
-
-		if f.hostMap.CheckHandshakeCompleteIP(vpnIP) && vpnIP < ip2int(f.certState.certificate.Details.Ips[0].IP) {
-			l.WithField("vpnIp", IntIp(vpnIP)).WithField("udpAddr", addr).
+			// Send a test packet to trigger an authenticated tunnel test, this should suss out any lingering tunnel issues
+			f.SendMessageToVpnIp(test, testRequest, vpnIP, []byte(""), make([]byte, 12, 12), make([]byte, mtu))
+			return
+		case ErrLocalIndexCollision:
+			// This means we failed to insert because of collision on localIndexId. Just let the next handshake packet retry
+			f.l.WithField("vpnIp", IntIp(vpnIP)).WithField("udpAddr", addr).
 				WithField("certName", certName).
 				WithField("fingerprint", fingerprint).
 				WithField("initiatorIndex", hs.Details.InitiatorIndex).WithField("responderIndex", hs.Details.ResponderIndex).
 				WithField("remoteIndex", h.RemoteIndex).WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).
-				Info("Prevented a handshake race")
-
-			// Send a test packet to trigger an authenticated tunnel test, this should suss out any lingering tunnel issues
-			f.SendMessageToVpnIp(test, testRequest, vpnIP, []byte(""), make([]byte, 12, 12), make([]byte, mtu))
-			return true
-		}
-
-		hostinfo.HandshakePacket[0] = make([]byte, len(packet[HeaderLen:]))
-		copy(hostinfo.HandshakePacket[0], packet[HeaderLen:])
-
-		// Regardless of whether you are the sender or receiver, you should arrive here
-		// and complete standing up the connection.
-		if dKey != nil && eKey != nil {
-			hostinfo.HandshakePacket[2] = make([]byte, len(msg))
-			copy(hostinfo.HandshakePacket[2], msg)
-
-			f.messageMetrics.Tx(handshake, NebulaMessageSubType(msg[1]), 1)
-			err := f.outside.WriteTo(msg, addr)
-			if err != nil {
-				l.WithField("vpnIp", IntIp(vpnIP)).WithField("udpAddr", addr).
-					WithField("certName", certName).
-					WithField("fingerprint", fingerprint).
-					WithField("initiatorIndex", hs.Details.InitiatorIndex).WithField("responderIndex", hs.Details.ResponderIndex).
-					WithField("remoteIndex", h.RemoteIndex).WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).
-					WithError(err).Error("Failed to send handshake")
-			} else {
-				l.WithField("vpnIp", IntIp(vpnIP)).WithField("udpAddr", addr).
-					WithField("certName", certName).
-					WithField("fingerprint", fingerprint).
-					WithField("initiatorIndex", hs.Details.InitiatorIndex).WithField("responderIndex", hs.Details.ResponderIndex).
-					WithField("remoteIndex", h.RemoteIndex).WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).
-					Info("Handshake message sent")
-			}
-
-			ip = ip2int(remoteCert.Details.Ips[0].IP)
-			ci.peerCert = remoteCert
-			ci.dKey = NewNebulaCipherState(dKey)
-			ci.eKey = NewNebulaCipherState(eKey)
-			//l.Debugln("got symmetric pairs")
-
-			//hostinfo.ClearRemotes()
-			hostinfo.AddRemote(*addr)
-			hostinfo.CreateRemoteCIDR(remoteCert)
-			f.lightHouse.AddRemoteAndReset(ip, addr)
-			if f.serveDns {
-				dnsR.Add(remoteCert.Details.Name+".", remoteCert.Details.Ips[0].IP.String())
-			}
-
-			ho, err := f.hostMap.QueryVpnIP(vpnIP)
-			if err == nil && ho.localIndexId != 0 {
-				l.WithField("vpnIp", vpnIP).
-					WithField("certName", certName).
-					WithField("fingerprint", fingerprint).
-					WithField("action", "removing stale index").
-					WithField("index", ho.localIndexId).
-					Debug("Handshake processing")
-				f.hostMap.DeleteIndex(ho.localIndexId)
-			}
-
-			f.hostMap.AddIndexHostInfo(hostinfo.localIndexId, hostinfo)
-			f.hostMap.AddVpnIPHostInfo(vpnIP, hostinfo)
-
-			hostinfo.handshakeComplete()
-		} else {
-			l.WithField("vpnIp", IntIp(hostinfo.hostId)).WithField("udpAddr", addr).
+				WithField("localIndex", hostinfo.localIndexId).WithField("collision", IntIp(existing.hostId)).
+				Error("Failed to add HostInfo due to localIndex collision")
+			return
+		case ErrExistingHandshake:
+			// We have a race where both parties think they are an initiator and this tunnel lost, let the other one finish
+			f.l.WithField("vpnIp", IntIp(vpnIP)).WithField("udpAddr", addr).
 				WithField("certName", certName).
 				WithField("fingerprint", fingerprint).
-				WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).
-				Error("Noise did not arrive at a key")
-			return true
+				WithField("initiatorIndex", hs.Details.InitiatorIndex).WithField("responderIndex", hs.Details.ResponderIndex).
+				WithField("remoteIndex", h.RemoteIndex).WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).
+				Error("Prevented a pending handshake race")
+			return
+		default:
+			// Shouldn't happen, but just in case someone adds a new error type to CheckAndComplete
+			// And we forget to update it here
+			f.l.WithError(err).WithField("vpnIp", IntIp(vpnIP)).WithField("udpAddr", addr).
+				WithField("certName", certName).
+				WithField("fingerprint", fingerprint).
+				WithField("initiatorIndex", hs.Details.InitiatorIndex).WithField("responderIndex", hs.Details.ResponderIndex).
+				WithField("remoteIndex", h.RemoteIndex).WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).
+				Error("Failed to add HostInfo to HostMap")
+			return
 		}
-
 	}
 
-	f.hostMap.AddRemote(ip, addr)
-	return false
+	// Do the send
+	f.messageMetrics.Tx(handshake, NebulaMessageSubType(msg[1]), 1)
+	err = f.outside.WriteTo(msg, addr)
+	if err != nil {
+		f.l.WithField("vpnIp", IntIp(vpnIP)).WithField("udpAddr", addr).
+			WithField("certName", certName).
+			WithField("fingerprint", fingerprint).
+			WithField("initiatorIndex", hs.Details.InitiatorIndex).WithField("responderIndex", hs.Details.ResponderIndex).
+			WithField("remoteIndex", h.RemoteIndex).WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).
+			WithError(err).Error("Failed to send handshake")
+	} else {
+		f.l.WithField("vpnIp", IntIp(vpnIP)).WithField("udpAddr", addr).
+			WithField("certName", certName).
+			WithField("fingerprint", fingerprint).
+			WithField("initiatorIndex", hs.Details.InitiatorIndex).WithField("responderIndex", hs.Details.ResponderIndex).
+			WithField("remoteIndex", h.RemoteIndex).WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).
+			WithField("sentCachedPackets", len(hostinfo.packetStore)).
+			Info("Handshake message sent")
+	}
+
+	hostinfo.handshakeComplete(f.l, f.cachedPacketMetrics)
+
+	return
 }
 
 func ixHandshakeStage2(f *Interface, addr *udpAddr, hostinfo *HostInfo, packet []byte, h *Header) bool {
 	if hostinfo == nil {
+		// Nothing here to tear down, got a bogus stage 2 packet
 		return true
 	}
 
-	if bytes.Equal(hostinfo.HandshakePacket[2], packet[HeaderLen:]) {
-		l.WithField("vpnIp", IntIp(hostinfo.hostId)).WithField("udpAddr", addr).
+	hostinfo.Lock()
+	defer hostinfo.Unlock()
+
+	ci := hostinfo.ConnectionState
+	if ci.ready {
+		f.l.WithField("vpnIp", IntIp(hostinfo.hostId)).WithField("udpAddr", addr).
 			WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).WithField("header", h).
-			Error("Already seen this handshake packet")
+			Info("Handshake is already complete")
+
+		//TODO: evaluate addr for preference, if we handshook with a less preferred addr we can correct quickly here
+
+		// We already have a complete tunnel, there is nothing that can be done by processing further stage 1 packets
 		return false
 	}
 
-	ci := hostinfo.ConnectionState
-	// Mark packet 2 as seen so it doesn't show up as missed
-	ci.window.Update(2)
-
-	hostinfo.HandshakePacket[2] = make([]byte, len(packet[HeaderLen:]))
-	copy(hostinfo.HandshakePacket[2], packet[HeaderLen:])
-
 	msg, eKey, dKey, err := ci.H.ReadMessage(nil, packet[HeaderLen:])
 	if err != nil {
-		l.WithError(err).WithField("vpnIp", IntIp(hostinfo.hostId)).WithField("udpAddr", addr).
+		f.l.WithError(err).WithField("vpnIp", IntIp(hostinfo.hostId)).WithField("udpAddr", addr).
 			WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).WithField("header", h).
 			Error("Failed to call noise.ReadMessage")
 
@@ -289,89 +308,112 @@ func ixHandshakeStage2(f *Interface, addr *udpAddr, hostinfo *HostInfo, packet [
 		// to DOS us. Every other error condition after should to allow a possible good handshake to complete in the
 		// near future
 		return false
+	} else if dKey == nil || eKey == nil {
+		f.l.WithField("vpnIp", IntIp(hostinfo.hostId)).WithField("udpAddr", addr).
+			WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).
+			Error("Noise did not arrive at a key")
+
+		// This should be impossible in IX but just in case, if we get here then there is no chance to recover
+		// the handshake state machine. Tear it down
+		return true
 	}
 
 	hs := &NebulaHandshake{}
 	err = proto.Unmarshal(msg, hs)
 	if err != nil || hs.Details == nil {
-		l.WithError(err).WithField("vpnIp", IntIp(hostinfo.hostId)).WithField("udpAddr", addr).
+		f.l.WithError(err).WithField("vpnIp", IntIp(hostinfo.hostId)).WithField("udpAddr", addr).
 			WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).Error("Failed unmarshal handshake message")
+
+		// The handshake state machine is complete, if things break now there is no chance to recover. Tear down and start again
 		return true
 	}
 
-	remoteCert, err := RecombineCertAndValidate(ci.H, hs.Details.Cert)
+	remoteCert, err := RecombineCertAndValidate(ci.H, hs.Details.Cert, f.caPool)
 	if err != nil {
-		l.WithError(err).WithField("vpnIp", IntIp(hostinfo.hostId)).WithField("udpAddr", addr).
+		f.l.WithError(err).WithField("vpnIp", IntIp(hostinfo.hostId)).WithField("udpAddr", addr).
 			WithField("cert", remoteCert).WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).
 			Error("Invalid certificate from host")
+
+		// The handshake state machine is complete, if things break now there is no chance to recover. Tear down and start again
 		return true
 	}
+
 	vpnIP := ip2int(remoteCert.Details.Ips[0].IP)
 	certName := remoteCert.Details.Name
 	fingerprint, _ := remoteCert.Sha256Sum()
 
+	// Ensure the right host responded
+	if vpnIP != hostinfo.hostId {
+		f.l.WithField("intendedVpnIp", IntIp(hostinfo.hostId)).WithField("haveVpnIp", IntIp(vpnIP)).
+			WithField("udpAddr", addr).WithField("certName", certName).
+			WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).
+			Info("Incorrect host responded to handshake")
+
+		// Release our old handshake from pending, it should not continue
+		f.handshakeManager.pendingHostMap.DeleteHostInfo(hostinfo)
+
+		// Create a new hostinfo/handshake for the intended vpn ip
+		//TODO: this adds it to the timer wheel in a way that aggressively retries
+		newHostInfo := f.getOrHandshake(hostinfo.hostId)
+		newHostInfo.Lock()
+
+		// Block the current used address
+		newHostInfo.remotes = hostinfo.remotes
+		newHostInfo.remotes.BlockRemote(addr)
+
+		// Get the correct remote list for the host we did handshake with
+		hostinfo.remotes = f.lightHouse.QueryCache(vpnIP)
+
+		f.l.WithField("blockedUdpAddrs", newHostInfo.remotes.CopyBlockedRemotes()).WithField("vpnIp", IntIp(vpnIP)).
+			WithField("remotes", newHostInfo.remotes.CopyAddrs(f.hostMap.preferredRanges)).
+			Info("Blocked addresses for handshakes")
+
+		// Swap the packet store to benefit the original intended recipient
+		hostinfo.ConnectionState.queueLock.Lock()
+		newHostInfo.packetStore = hostinfo.packetStore
+		hostinfo.packetStore = []*cachedPacket{}
+		hostinfo.ConnectionState.queueLock.Unlock()
+
+		// Finally, put the correct vpn ip in the host info, tell them to close the tunnel, and return true to tear down
+		hostinfo.hostId = vpnIP
+		f.sendCloseTunnel(hostinfo)
+		newHostInfo.Unlock()
+
+		return true
+	}
+
+	// Mark packet 2 as seen so it doesn't show up as missed
+	ci.window.Update(f.l, 2)
+
 	duration := time.Since(hostinfo.handshakeStart).Nanoseconds()
-	l.WithField("vpnIp", IntIp(vpnIP)).WithField("udpAddr", addr).
+	f.l.WithField("vpnIp", IntIp(vpnIP)).WithField("udpAddr", addr).
 		WithField("certName", certName).
 		WithField("fingerprint", fingerprint).
 		WithField("initiatorIndex", hs.Details.InitiatorIndex).WithField("responderIndex", hs.Details.ResponderIndex).
 		WithField("remoteIndex", h.RemoteIndex).WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).
 		WithField("durationNs", duration).
+		WithField("sentCachedPackets", len(hostinfo.packetStore)).
 		Info("Handshake message received")
 
-	//ci.remoteIndex = hs.ResponderIndex
 	hostinfo.remoteIndexId = hs.Details.ResponderIndex
-	hs.Details.Cert = ci.certState.rawCertificateNoKey
+	hostinfo.lastHandshakeTime = hs.Details.Time
 
-	/*
-		hsBytes, err := proto.Marshal(hs)
-		if err != nil {
-			l.Debugln("Failed to marshal handshake: ", err)
-			return
-		}
-	*/
+	// Store their cert and our symmetric keys
+	ci.peerCert = remoteCert
+	ci.dKey = NewNebulaCipherState(dKey)
+	ci.eKey = NewNebulaCipherState(eKey)
 
-	// Regardless of whether you are the sender or receiver, you should arrive here
-	// and complete standing up the connection.
-	if dKey != nil && eKey != nil {
-		ip := ip2int(remoteCert.Details.Ips[0].IP)
-		ci.peerCert = remoteCert
-		ci.dKey = NewNebulaCipherState(dKey)
-		ci.eKey = NewNebulaCipherState(eKey)
-		//l.Debugln("got symmetric pairs")
+	// Make sure the current udpAddr being used is set for responding
+	hostinfo.SetRemote(addr)
 
-		//hostinfo.ClearRemotes()
-		f.hostMap.AddRemote(ip, addr)
-		hostinfo.CreateRemoteCIDR(remoteCert)
-		f.lightHouse.AddRemoteAndReset(ip, addr)
-		if f.serveDns {
-			dnsR.Add(remoteCert.Details.Name+".", remoteCert.Details.Ips[0].IP.String())
-		}
+	// Build up the radix for the firewall if we have subnets in the cert
+	hostinfo.CreateRemoteCIDR(remoteCert)
 
-		ho, err := f.hostMap.QueryVpnIP(vpnIP)
-		if err == nil && ho.localIndexId != 0 {
-			l.WithField("vpnIp", vpnIP).
-				WithField("certName", certName).
-				WithField("fingerprint", fingerprint).
-				WithField("action", "removing stale index").
-				WithField("index", ho.localIndexId).
-				Debug("Handshake processing")
-			f.hostMap.DeleteIndex(ho.localIndexId)
-		}
-
-		f.hostMap.AddVpnIPHostInfo(vpnIP, hostinfo)
-		f.hostMap.AddIndexHostInfo(hostinfo.localIndexId, hostinfo)
-
-		hostinfo.handshakeComplete()
-		f.metricHandshakes.Update(duration)
-	} else {
-		l.WithField("vpnIp", IntIp(hostinfo.hostId)).WithField("udpAddr", addr).
-			WithField("certName", certName).
-			WithField("fingerprint", fingerprint).
-			WithField("handshake", m{"stage": 2, "style": "ix_psk0"}).
-			Error("Noise did not arrive at a key")
-		return true
-	}
+	// Complete our handshake and update metrics, this will replace any existing tunnels for this vpnIp
+	//TODO: Complete here does not do a race avoidance, it will just take the new tunnel. Is this ok?
+	f.handshakeManager.Complete(hostinfo, f)
+	hostinfo.handshakeComplete(f.l, f.cachedPacketMetrics)
+	f.metricHandshakes.Update(duration)
 
 	return false
 }

handshake_manager.go

@@ -1,22 +1,20 @@
 package nebula
 
 import (
+	"bytes"
 	"crypto/rand"
 	"encoding/binary"
-	"fmt"
+	"errors"
 	"net"
 	"time"
 
+	"github.com/rcrowley/go-metrics"
 	"github.com/sirupsen/logrus"
 )
 
 const (
-	// Total time to try a handshake = sequence of HandshakeTryInterval * HandshakeRetries
-	// With 100ms interval and 20 retries is 23.5 seconds
-	DefaultHandshakeTryInterval = time.Millisecond * 100
-	DefaultHandshakeRetries     = 20
-	// DefaultHandshakeWaitRotation is the number of handshake attempts to do before starting to use other ips addresses
-	DefaultHandshakeWaitRotation  = 5
+	DefaultHandshakeTryInterval   = time.Millisecond * 100
+	DefaultHandshakeRetries       = 10
 	DefaultHandshakeTriggerBuffer = 64
 )
 
@@ -24,7 +22,6 @@ var (
 	defaultHandshakeConfig = HandshakeConfig{
 		tryInterval:   DefaultHandshakeTryInterval,
 		retries:       DefaultHandshakeRetries,
-		waitRotation:  DefaultHandshakeWaitRotation,
 		triggerBuffer: DefaultHandshakeTriggerBuffer,
 	}
 )
@@ -32,43 +29,40 @@ var (
 type HandshakeConfig struct {
 	tryInterval   time.Duration
 	retries       int
-	waitRotation  int
 	triggerBuffer int
 
 	messageMetrics *MessageMetrics
 }
 
 type HandshakeManager struct {
-	pendingHostMap *HostMap
-	mainHostMap    *HostMap
-	lightHouse     *LightHouse
-	outside        *udpConn
-	config         HandshakeConfig
+	pendingHostMap         *HostMap
+	mainHostMap            *HostMap
+	lightHouse             *LightHouse
+	outside                *udpConn
+	config                 HandshakeConfig
+	OutboundHandshakeTimer *SystemTimerWheel
+	messageMetrics         *MessageMetrics
+	metricInitiated        metrics.Counter
+	metricTimedOut         metrics.Counter
+	l                      *logrus.Logger
 
 	// can be used to trigger outbound handshake for the given vpnIP
 	trigger chan uint32
-
-	OutboundHandshakeTimer *SystemTimerWheel
-	InboundHandshakeTimer  *SystemTimerWheel
-
-	messageMetrics *MessageMetrics
 }
 
-func NewHandshakeManager(tunCidr *net.IPNet, preferredRanges []*net.IPNet, mainHostMap *HostMap, lightHouse *LightHouse, outside *udpConn, config HandshakeConfig) *HandshakeManager {
+func NewHandshakeManager(l *logrus.Logger, tunCidr *net.IPNet, preferredRanges []*net.IPNet, mainHostMap *HostMap, lightHouse *LightHouse, outside *udpConn, config HandshakeConfig) *HandshakeManager {
 	return &HandshakeManager{
-		pendingHostMap: NewHostMap("pending", tunCidr, preferredRanges),
-		mainHostMap:    mainHostMap,
-		lightHouse:     lightHouse,
-		outside:        outside,
-
-		config: config,
-
-		trigger: make(chan uint32, config.triggerBuffer),
-
-		OutboundHandshakeTimer: NewSystemTimerWheel(config.tryInterval, config.tryInterval*time.Duration(config.retries)),
-		InboundHandshakeTimer:  NewSystemTimerWheel(config.tryInterval, config.tryInterval*time.Duration(config.retries)),
-
-		messageMetrics: config.messageMetrics,
+		pendingHostMap:         NewHostMap(l, "pending", tunCidr, preferredRanges),
+		mainHostMap:            mainHostMap,
+		lightHouse:             lightHouse,
+		outside:                outside,
+		config:                 config,
+		trigger:                make(chan uint32, config.triggerBuffer),
+		OutboundHandshakeTimer: NewSystemTimerWheel(config.tryInterval, hsTimeout(config.retries, config.tryInterval)),
+		messageMetrics:         config.messageMetrics,
+		metricInitiated:        metrics.GetOrRegisterCounter("handshake_manager.initiated", nil),
+		metricTimedOut:         metrics.GetOrRegisterCounter("handshake_manager.timed_out", nil),
+		l:                      l,
 	}
 }
 
@@ -77,11 +71,10 @@ func (c *HandshakeManager) Run(f EncWriter) {
 	for {
 		select {
 		case vpnIP := <-c.trigger:
-			l.WithField("vpnIp", IntIp(vpnIP)).Debug("HandshakeManager: triggered")
+			c.l.WithField("vpnIp", IntIp(vpnIP)).Debug("HandshakeManager: triggered")
 			c.handleOutbound(vpnIP, f, true)
 		case now := <-clockSource:
 			c.NextOutboundHandshakeTimerTick(now, f)
-			c.NextInboundHandshakeTimerTick(now)
 		}
 	}
 }
@@ -99,99 +92,94 @@ func (c *HandshakeManager) NextOutboundHandshakeTimerTick(now time.Time, f EncWr
 }
 
 func (c *HandshakeManager) handleOutbound(vpnIP uint32, f EncWriter, lighthouseTriggered bool) {
-	index, err := c.pendingHostMap.GetIndexByVpnIP(vpnIP)
-	if err != nil {
-		return
-	}
 	hostinfo, err := c.pendingHostMap.QueryVpnIP(vpnIP)
 	if err != nil {
 		return
 	}
+	hostinfo.Lock()
+	defer hostinfo.Unlock()
 
-	// If we haven't finished the handshake and we haven't hit max retries, query
-	// lighthouse and then send the handshake packet again.
-	if hostinfo.HandshakeCounter < c.config.retries && !hostinfo.HandshakeComplete {
-		if hostinfo.remote == nil {
-			// We continue to query the lighthouse because hosts may
-			// come online during handshake retries. If the query
-			// succeeds (no error), add the lighthouse info to hostinfo
-			ips := c.lightHouse.QueryCache(vpnIP)
-			// If we have no responses yet, or only one IP (the host hadn't
-			// finished reporting its own IPs yet), then send another query to
-			// the LH.
-			if len(ips) <= 1 {
-				ips, err = c.lightHouse.Query(vpnIP, f)
-			}
-			if err == nil {
-				for _, ip := range ips {
-					hostinfo.AddRemote(ip)
-				}
-				hostinfo.ForcePromoteBest(c.mainHostMap.preferredRanges)
-			}
-		} else if lighthouseTriggered {
-			// We were triggered by a lighthouse HostQueryReply packet, but
-			// we have already picked a remote for this host (this can happen
-			// if we are configured with multiple lighthouses). So we can skip
-			// this trigger and let the timerwheel handle the rest of the
-			// process
-			return
-		}
-
-		hostinfo.HandshakeCounter++
-
-		// We want to use the "best" calculated ip for the first 5 attempts, after that we just blindly rotate through
-		// all the others until we can stand up a connection.
-		if hostinfo.HandshakeCounter > c.config.waitRotation {
-			hostinfo.rotateRemote()
-		}
-
-		// Ensure the handshake is ready to avoid a race in timer tick and stage 0 handshake generation
-		if hostinfo.HandshakeReady && hostinfo.remote != nil {
-			c.messageMetrics.Tx(handshake, NebulaMessageSubType(hostinfo.HandshakePacket[0][1]), 1)
-			err := c.outside.WriteTo(hostinfo.HandshakePacket[0], hostinfo.remote)
-			if err != nil {
-				hostinfo.logger().WithField("udpAddr", hostinfo.remote).
-					WithField("initiatorIndex", hostinfo.localIndexId).
-					WithField("remoteIndex", hostinfo.remoteIndexId).
-					WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).
-					WithError(err).Error("Failed to send handshake message")
-			} else {
-				//TODO: this log line is assuming a lot of stuff around the cached stage 0 handshake packet, we should
-				// keep the real packet struct around for logging purposes
-				hostinfo.logger().WithField("udpAddr", hostinfo.remote).
-					WithField("initiatorIndex", hostinfo.localIndexId).
-					WithField("remoteIndex", hostinfo.remoteIndexId).
-					WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).
-					Info("Handshake message sent")
-			}
-		}
-
-		// Readd to the timer wheel so we continue trying wait HandshakeTryInterval * counter longer for next try
-		if !lighthouseTriggered {
-			//l.Infoln("Interval: ", HandshakeTryInterval*time.Duration(hostinfo.HandshakeCounter))
-			c.OutboundHandshakeTimer.Add(vpnIP, c.config.tryInterval*time.Duration(hostinfo.HandshakeCounter))
-		}
-	} else {
-		c.pendingHostMap.DeleteVpnIP(vpnIP)
-		c.pendingHostMap.DeleteIndex(index)
+	// We may have raced to completion but now that we have a lock we should ensure we have not yet completed.
+	if hostinfo.HandshakeComplete {
+		// Ensure we don't exist in the pending hostmap anymore since we have completed
+		c.pendingHostMap.DeleteHostInfo(hostinfo)
+		return
 	}
-}
 
-func (c *HandshakeManager) NextInboundHandshakeTimerTick(now time.Time) {
-	c.InboundHandshakeTimer.advance(now)
-	for {
-		ep := c.InboundHandshakeTimer.Purge()
-		if ep == nil {
-			break
-		}
-		index := ep.(uint32)
+	// Check if we have a handshake packet to transmit yet
+	if !hostinfo.HandshakeReady {
+		// There is currently a slight race in getOrHandshake due to ConnectionState not being part of the HostInfo directly
+		// Our hostinfo here was added to the pending map and the wheel may have ticked to us before we created ConnectionState
+		c.OutboundHandshakeTimer.Add(vpnIP, c.config.tryInterval*time.Duration(hostinfo.HandshakeCounter))
+		return
+	}
 
-		vpnIP, err := c.pendingHostMap.GetVpnIPByIndex(index)
+	// If we are out of time, clean up
+	if hostinfo.HandshakeCounter >= c.config.retries {
+		hostinfo.logger(c.l).WithField("udpAddrs", hostinfo.remotes.CopyAddrs(c.pendingHostMap.preferredRanges)).
+			WithField("initiatorIndex", hostinfo.localIndexId).
+			WithField("remoteIndex", hostinfo.remoteIndexId).
+			WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).
+			WithField("durationNs", time.Since(hostinfo.handshakeStart).Nanoseconds()).
+			Info("Handshake timed out")
+		c.metricTimedOut.Inc(1)
+		c.pendingHostMap.DeleteHostInfo(hostinfo)
+		return
+	}
+
+	// We only care about a lighthouse trigger before the first handshake transmit attempt. This is a very specific
+	// optimization for a fast lighthouse reply
+	//TODO: it would feel better to do this once, anytime, as our delay increases over time
+	if lighthouseTriggered && hostinfo.HandshakeCounter > 0 {
+		// If we didn't return here a lighthouse could cause us to aggressively send handshakes
+		return
+	}
+
+	// Get a remotes object if we don't already have one.
+	// This is mainly to protect us as this should never be the case
+	if hostinfo.remotes == nil {
+		hostinfo.remotes = c.lightHouse.QueryCache(vpnIP)
+	}
+
+	//TODO: this will generate a load of queries for hosts with only 1 ip (i'm not using a lighthouse, static mapped)
+	if hostinfo.remotes.Len(c.pendingHostMap.preferredRanges) <= 1 {
+		// If we only have 1 remote it is highly likely our query raced with the other host registered within the lighthouse
+		// Our vpnIP here has a tunnel with a lighthouse but has yet to send a host update packet there so we only know about
+		// the learned public ip for them. Query again to short circuit the promotion counter
+		c.lightHouse.QueryServer(vpnIP, f)
+	}
+
+	// Send a the handshake to all known ips, stage 2 takes care of assigning the hostinfo.remote based on the first to reply
+	var sentTo []*udpAddr
+	hostinfo.remotes.ForEach(c.pendingHostMap.preferredRanges, func(addr *udpAddr, _ bool) {
+		c.messageMetrics.Tx(handshake, NebulaMessageSubType(hostinfo.HandshakePacket[0][1]), 1)
+		err = c.outside.WriteTo(hostinfo.HandshakePacket[0], addr)
 		if err != nil {
-			continue
+			hostinfo.logger(c.l).WithField("udpAddr", addr).
+				WithField("initiatorIndex", hostinfo.localIndexId).
+				WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).
+				WithError(err).Error("Failed to send handshake message")
+
+		} else {
+			sentTo = append(sentTo, addr)
 		}
-		c.pendingHostMap.DeleteIndex(index)
-		c.pendingHostMap.DeleteVpnIP(vpnIP)
+	})
+
+	// Don't be too noisy or confusing if we fail to send a handshake - if we don't get through we'll eventually log a timeout
+	if len(sentTo) > 0 {
+		hostinfo.logger(c.l).WithField("udpAddrs", sentTo).
+			WithField("initiatorIndex", hostinfo.localIndexId).
+			WithField("handshake", m{"stage": 1, "style": "ix_psk0"}).
+			Info("Handshake message sent")
+	}
+
+	// Increment the counter to increase our delay, linear backoff
+	hostinfo.HandshakeCounter++
+
+	// If a lighthouse triggered this attempt then we are still in the timer wheel and do not need to re-add
+	if !lighthouseTriggered {
+		//TODO: feel like we dupe handshake real fast in a tight loop, why?
+		c.OutboundHandshakeTimer.Add(vpnIP, c.config.tryInterval*time.Duration(hostinfo.HandshakeCounter))
 	}
 }
 
@@ -199,33 +187,166 @@ func (c *HandshakeManager) AddVpnIP(vpnIP uint32) *HostInfo {
 	hostinfo := c.pendingHostMap.AddVpnIP(vpnIP)
 	// We lock here and use an array to insert items to prevent locking the
 	// main receive thread for very long by waiting to add items to the pending map
+	//TODO: what lock?
 	c.OutboundHandshakeTimer.Add(vpnIP, c.config.tryInterval)
+	c.metricInitiated.Inc(1)
 
 	return hostinfo
 }
 
-func (c *HandshakeManager) DeleteVpnIP(vpnIP uint32) {
-	//l.Debugln("Deleting pending vpn ip :", IntIp(vpnIP))
-	c.pendingHostMap.DeleteVpnIP(vpnIP)
-}
+var (
+	ErrExistingHostInfo    = errors.New("existing hostinfo")
+	ErrAlreadySeen         = errors.New("already seen")
+	ErrLocalIndexCollision = errors.New("local index collision")
+	ErrExistingHandshake   = errors.New("existing handshake")
+)
 
-func (c *HandshakeManager) AddIndex(index uint32, ci *ConnectionState) (*HostInfo, error) {
-	hostinfo, err := c.pendingHostMap.AddIndex(index, ci)
-	if err != nil {
-		return nil, fmt.Errorf("Issue adding index: %d", index)
+// CheckAndComplete checks for any conflicts in the main and pending hostmap
+// before adding hostinfo to main. If err is nil, it was added. Otherwise err will be:
+
+// ErrAlreadySeen if we already have an entry in the hostmap that has seen the
+// exact same handshake packet
+//
+// ErrExistingHostInfo if we already have an entry in the hostmap for this
+// VpnIP and the new handshake was older than the one we currently have
+//
+// ErrLocalIndexCollision if we already have an entry in the main or pending
+// hostmap for the hostinfo.localIndexId.
+func (c *HandshakeManager) CheckAndComplete(hostinfo *HostInfo, handshakePacket uint8, overwrite bool, f *Interface) (*HostInfo, error) {
+	c.pendingHostMap.Lock()
+	defer c.pendingHostMap.Unlock()
+	c.mainHostMap.Lock()
+	defer c.mainHostMap.Unlock()
+
+	// Check if we already have a tunnel with this vpn ip
+	existingHostInfo, found := c.mainHostMap.Hosts[hostinfo.hostId]
+	if found && existingHostInfo != nil {
+		// Is it just a delayed handshake packet?
+		if bytes.Equal(hostinfo.HandshakePacket[handshakePacket], existingHostInfo.HandshakePacket[handshakePacket]) {
+			return existingHostInfo, ErrAlreadySeen
+		}
+
+		// Is this a newer handshake?
+		if existingHostInfo.lastHandshakeTime >= hostinfo.lastHandshakeTime {
+			return existingHostInfo, ErrExistingHostInfo
+		}
+
+		existingHostInfo.logger(c.l).Info("Taking new handshake")
 	}
-	//c.mainHostMap.AddIndexHostInfo(index, hostinfo)
-	c.InboundHandshakeTimer.Add(index, time.Second*10)
-	return hostinfo, nil
+
+	existingIndex, found := c.mainHostMap.Indexes[hostinfo.localIndexId]
+	if found {
+		// We have a collision, but for a different hostinfo
+		return existingIndex, ErrLocalIndexCollision
+	}
+
+	existingIndex, found = c.pendingHostMap.Indexes[hostinfo.localIndexId]
+	if found && existingIndex != hostinfo {
+		// We have a collision, but for a different hostinfo
+		return existingIndex, ErrLocalIndexCollision
+	}
+
+	existingRemoteIndex, found := c.mainHostMap.RemoteIndexes[hostinfo.remoteIndexId]
+	if found && existingRemoteIndex != nil && existingRemoteIndex.hostId != hostinfo.hostId {
+		// We have a collision, but this can happen since we can't control
+		// the remote ID. Just log about the situation as a note.
+		hostinfo.logger(c.l).
+			WithField("remoteIndex", hostinfo.remoteIndexId).WithField("collision", IntIp(existingRemoteIndex.hostId)).
+			Info("New host shadows existing host remoteIndex")
+	}
+
+	// Check if we are also handshaking with this vpn ip
+	pendingHostInfo, found := c.pendingHostMap.Hosts[hostinfo.hostId]
+	if found && pendingHostInfo != nil {
+		if !overwrite {
+			// We won, let our pending handshake win
+			return pendingHostInfo, ErrExistingHandshake
+		}
+
+		// We lost, take this handshake and move any cached packets over so they get sent
+		pendingHostInfo.ConnectionState.queueLock.Lock()
+		hostinfo.packetStore = append(hostinfo.packetStore, pendingHostInfo.packetStore...)
+		c.pendingHostMap.unlockedDeleteHostInfo(pendingHostInfo)
+		pendingHostInfo.ConnectionState.queueLock.Unlock()
+		pendingHostInfo.logger(c.l).Info("Handshake race lost, replacing pending handshake with completed tunnel")
+	}
+
+	if existingHostInfo != nil {
+		// We are going to overwrite this entry, so remove the old references
+		delete(c.mainHostMap.Hosts, existingHostInfo.hostId)
+		delete(c.mainHostMap.Indexes, existingHostInfo.localIndexId)
+		delete(c.mainHostMap.RemoteIndexes, existingHostInfo.remoteIndexId)
+	}
+
+	c.mainHostMap.addHostInfo(hostinfo, f)
+	return existingHostInfo, nil
 }
 
-func (c *HandshakeManager) AddIndexHostInfo(index uint32, h *HostInfo) {
-	c.pendingHostMap.AddIndexHostInfo(index, h)
+// Complete is a simpler version of CheckAndComplete when we already know we
+// won't have a localIndexId collision because we already have an entry in the
+// pendingHostMap
+func (c *HandshakeManager) Complete(hostinfo *HostInfo, f *Interface) {
+	c.pendingHostMap.Lock()
+	defer c.pendingHostMap.Unlock()
+	c.mainHostMap.Lock()
+	defer c.mainHostMap.Unlock()
+
+	existingHostInfo, found := c.mainHostMap.Hosts[hostinfo.hostId]
+	if found && existingHostInfo != nil {
+		// We are going to overwrite this entry, so remove the old references
+		delete(c.mainHostMap.Hosts, existingHostInfo.hostId)
+		delete(c.mainHostMap.Indexes, existingHostInfo.localIndexId)
+		delete(c.mainHostMap.RemoteIndexes, existingHostInfo.remoteIndexId)
+	}
+
+	existingRemoteIndex, found := c.mainHostMap.RemoteIndexes[hostinfo.remoteIndexId]
+	if found && existingRemoteIndex != nil {
+		// We have a collision, but this can happen since we can't control
+		// the remote ID. Just log about the situation as a note.
+		hostinfo.logger(c.l).
+			WithField("remoteIndex", hostinfo.remoteIndexId).WithField("collision", IntIp(existingRemoteIndex.hostId)).
+			Info("New host shadows existing host remoteIndex")
+	}
+
+	c.mainHostMap.addHostInfo(hostinfo, f)
+	c.pendingHostMap.unlockedDeleteHostInfo(hostinfo)
 }
 
-func (c *HandshakeManager) DeleteIndex(index uint32) {
-	//l.Debugln("Deleting pending index :", index)
-	c.pendingHostMap.DeleteIndex(index)
+// AddIndexHostInfo generates a unique localIndexId for this HostInfo
+// and adds it to the pendingHostMap. Will error if we are unable to generate
+// a unique localIndexId
+func (c *HandshakeManager) AddIndexHostInfo(h *HostInfo) error {
+	c.pendingHostMap.Lock()
+	defer c.pendingHostMap.Unlock()
+	c.mainHostMap.RLock()
+	defer c.mainHostMap.RUnlock()
+
+	for i := 0; i < 32; i++ {
+		index, err := generateIndex(c.l)
+		if err != nil {
+			return err
+		}
+
+		_, inPending := c.pendingHostMap.Indexes[index]
+		_, inMain := c.mainHostMap.Indexes[index]
+
+		if !inMain && !inPending {
+			h.localIndexId = index
+			c.pendingHostMap.Indexes[index] = h
+			return nil
+		}
+	}
+
+	return errors.New("failed to generate unique localIndexId")
+}
+
+func (c *HandshakeManager) addRemoteIndexHostInfo(index uint32, h *HostInfo) {
+	c.pendingHostMap.addRemoteIndexHostInfo(index, h)
+}
+
+func (c *HandshakeManager) DeleteHostInfo(hostinfo *HostInfo) {
+	//l.Debugln("Deleting pending hostinfo :", hostinfo)
+	c.pendingHostMap.DeleteHostInfo(hostinfo)
 }
 
 func (c *HandshakeManager) QueryIndex(index uint32) (*HostInfo, error) {
@@ -239,18 +360,28 @@ func (c *HandshakeManager) EmitStats() {
 
 // Utility functions below
 
-func generateIndex() (uint32, error) {
+func generateIndex(l *logrus.Logger) (uint32, error) {
 	b := make([]byte, 4)
-	_, err := rand.Read(b)
-	if err != nil {
-		l.Errorln(err)
-		return 0, err
+
+	// Let zero mean we don't know the ID, so don't generate zero
+	var index uint32
+	for index == 0 {
+		_, err := rand.Read(b)
+		if err != nil {
+			l.Errorln(err)
+			return 0, err
+		}
+
+		index = binary.BigEndian.Uint32(b)
 	}
 
-	index := binary.BigEndian.Uint32(b)
 	if l.Level >= logrus.DebugLevel {
 		l.WithField("index", index).
 			Debug("Generated index")
 	}
 	return index, nil
 }
+
+func hsTimeout(tries int, interval time.Duration) time.Duration {
+	return time.Duration(tries / 2 * ((2 * int(interval)) + (tries-1)*int(interval)))
+}

handshake_manager_test.go

@@ -8,137 +8,84 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
-var indexes []uint32 = []uint32{1000, 2000, 3000, 4000}
-
-//var ips []uint32 = []uint32{9000, 9999999, 3, 292394923}
-var ips []uint32
-
-func Test_NewHandshakeManagerIndex(t *testing.T) {
-	_, tuncidr, _ := net.ParseCIDR("172.1.1.1/24")
-	_, vpncidr, _ := net.ParseCIDR("172.1.1.1/24")
-	_, localrange, _ := net.ParseCIDR("10.1.1.1/24")
-	ips = []uint32{ip2int(net.ParseIP("172.1.1.2"))}
-	preferredRanges := []*net.IPNet{localrange}
-	mainHM := NewHostMap("test", vpncidr, preferredRanges)
-
-	blah := NewHandshakeManager(tuncidr, preferredRanges, mainHM, &LightHouse{}, &udpConn{}, defaultHandshakeConfig)
-
-	now := time.Now()
-	blah.NextInboundHandshakeTimerTick(now)
-
-	// Add four indexes
-	for _, v := range indexes {
-		blah.AddIndex(v, &ConnectionState{})
-	}
-	// Confirm they are in the pending index list
-	for _, v := range indexes {
-		assert.Contains(t, blah.pendingHostMap.Indexes, uint32(v))
-	}
-	// Adding something to pending should not affect the main hostmap
-	assert.Len(t, mainHM.Indexes, 0)
-	// Jump ahead 8 seconds
-	for i := 1; i <= DefaultHandshakeRetries; i++ {
-		next_tick := now.Add(DefaultHandshakeTryInterval * time.Duration(i))
-		blah.NextInboundHandshakeTimerTick(next_tick)
-	}
-	// Confirm they are still in the pending index list
-	for _, v := range indexes {
-		assert.Contains(t, blah.pendingHostMap.Indexes, uint32(v))
-	}
-	// Jump ahead 4 more seconds
-	next_tick := now.Add(12 * time.Second)
-	blah.NextInboundHandshakeTimerTick(next_tick)
-	// Confirm they have been removed
-	for _, v := range indexes {
-		assert.NotContains(t, blah.pendingHostMap.Indexes, uint32(v))
-	}
-}
-
 func Test_NewHandshakeManagerVpnIP(t *testing.T) {
-	_, tuncidr, _ := net.ParseCIDR("172.1.1.1/24")
-	_, vpncidr, _ := net.ParseCIDR("172.1.1.1/24")
-	_, localrange, _ := net.ParseCIDR("10.1.1.1/24")
-	ips = []uint32{ip2int(net.ParseIP("172.1.1.2"))}
-	preferredRanges := []*net.IPNet{localrange}
-	mw := &mockEncWriter{}
-	mainHM := NewHostMap("test", vpncidr, preferredRanges)
-
-	blah := NewHandshakeManager(tuncidr, preferredRanges, mainHM, &LightHouse{}, &udpConn{}, defaultHandshakeConfig)
-
-	now := time.Now()
-	blah.NextOutboundHandshakeTimerTick(now, mw)
-
-	// Add four "IPs" - which are just uint32s
-	for _, v := range ips {
-		blah.AddVpnIP(v)
-	}
-	// Adding something to pending should not affect the main hostmap
-	assert.Len(t, mainHM.Hosts, 0)
-	// Confirm they are in the pending index list
-	for _, v := range ips {
-		assert.Contains(t, blah.pendingHostMap.Hosts, uint32(v))
-	}
-
-	// Jump ahead `HandshakeRetries` ticks
-	cumulative := time.Duration(0)
-	for i := 0; i <= DefaultHandshakeRetries+1; i++ {
-		cumulative += time.Duration(i)*DefaultHandshakeTryInterval + 1
-		next_tick := now.Add(cumulative)
-		//l.Infoln(next_tick)
-		blah.NextOutboundHandshakeTimerTick(next_tick, mw)
-	}
-
-	// Confirm they are still in the pending index list
-	for _, v := range ips {
-		assert.Contains(t, blah.pendingHostMap.Hosts, uint32(v))
-	}
-	// Jump ahead 1 more second
-	cumulative += time.Duration(DefaultHandshakeRetries+1) * DefaultHandshakeTryInterval
-	next_tick := now.Add(cumulative)
-	//l.Infoln(next_tick)
-	blah.NextOutboundHandshakeTimerTick(next_tick, mw)
-	// Confirm they have been removed
-	for _, v := range ips {
-		assert.NotContains(t, blah.pendingHostMap.Hosts, uint32(v))
-	}
-}
-
-func Test_NewHandshakeManagerTrigger(t *testing.T) {
+	l := NewTestLogger()
 	_, tuncidr, _ := net.ParseCIDR("172.1.1.1/24")
 	_, vpncidr, _ := net.ParseCIDR("172.1.1.1/24")
 	_, localrange, _ := net.ParseCIDR("10.1.1.1/24")
 	ip := ip2int(net.ParseIP("172.1.1.2"))
 	preferredRanges := []*net.IPNet{localrange}
 	mw := &mockEncWriter{}
-	mainHM := NewHostMap("test", vpncidr, preferredRanges)
-	lh := &LightHouse{}
+	mainHM := NewHostMap(l, "test", vpncidr, preferredRanges)
 
-	blah := NewHandshakeManager(tuncidr, preferredRanges, mainHM, lh, &udpConn{}, defaultHandshakeConfig)
+	blah := NewHandshakeManager(l, tuncidr, preferredRanges, mainHM, &LightHouse{}, &udpConn{}, defaultHandshakeConfig)
+
+	now := time.Now()
+	blah.NextOutboundHandshakeTimerTick(now, mw)
+
+	i := blah.AddVpnIP(ip)
+	i.remotes = NewRemoteList()
+	i.HandshakeReady = true
+
+	// Adding something to pending should not affect the main hostmap
+	assert.Len(t, mainHM.Hosts, 0)
+
+	// Confirm they are in the pending index list
+	assert.Contains(t, blah.pendingHostMap.Hosts, ip)
+
+	// Jump ahead `HandshakeRetries` ticks, offset by one to get the sleep logic right
+	for i := 1; i <= DefaultHandshakeRetries+1; i++ {
+		now = now.Add(time.Duration(i) * DefaultHandshakeTryInterval)
+		blah.NextOutboundHandshakeTimerTick(now, mw)
+	}
+
+	// Confirm they are still in the pending index list
+	assert.Contains(t, blah.pendingHostMap.Hosts, ip)
+
+	// Tick 1 more time, a minute will certainly flush it out
+	blah.NextOutboundHandshakeTimerTick(now.Add(time.Minute), mw)
+
+	// Confirm they have been removed
+	assert.NotContains(t, blah.pendingHostMap.Hosts, ip)
+}
+
+func Test_NewHandshakeManagerTrigger(t *testing.T) {
+	l := NewTestLogger()
+	_, tuncidr, _ := net.ParseCIDR("172.1.1.1/24")
+	_, vpncidr, _ := net.ParseCIDR("172.1.1.1/24")
+	_, localrange, _ := net.ParseCIDR("10.1.1.1/24")
+	ip := ip2int(net.ParseIP("172.1.1.2"))
+	preferredRanges := []*net.IPNet{localrange}
+	mw := &mockEncWriter{}
+	mainHM := NewHostMap(l, "test", vpncidr, preferredRanges)
+	lh := &LightHouse{addrMap: make(map[uint32]*RemoteList), l: l}
+
+	blah := NewHandshakeManager(l, tuncidr, preferredRanges, mainHM, lh, &udpConn{}, defaultHandshakeConfig)
 
 	now := time.Now()
 	blah.NextOutboundHandshakeTimerTick(now, mw)
 
 	assert.Equal(t, 0, testCountTimerWheelEntries(blah.OutboundHandshakeTimer))
 
-	blah.AddVpnIP(ip)
+	hi := blah.AddVpnIP(ip)
+	hi.HandshakeReady = true
+	assert.Equal(t, 1, testCountTimerWheelEntries(blah.OutboundHandshakeTimer))
+	assert.Equal(t, 0, hi.HandshakeCounter, "Should not have attempted a handshake yet")
 
+	// Trigger the same method the channel will but, this should set our remotes pointer
+	blah.handleOutbound(ip, mw, true)
+	assert.Equal(t, 1, hi.HandshakeCounter, "Trigger should have done a handshake attempt")
+	assert.NotNil(t, hi.remotes, "Manager should have set my remotes pointer")
+
+	// Make sure the trigger doesn't double schedule the timer entry
 	assert.Equal(t, 1, testCountTimerWheelEntries(blah.OutboundHandshakeTimer))
 
-	// Trigger the same method the channel will
+	uaddr := NewUDPAddrFromString("10.1.1.1:4242")
+	hi.remotes.unlockedPrependV4(ip, NewIp4AndPort(uaddr.IP, uint32(uaddr.Port)))
+
+	// We now have remotes but only the first trigger should have pushed things forward
 	blah.handleOutbound(ip, mw, true)
-
-	// Make sure the trigger doesn't schedule another timer entry
-	assert.Equal(t, 1, testCountTimerWheelEntries(blah.OutboundHandshakeTimer))
-	hi := blah.pendingHostMap.Hosts[ip]
-	assert.Nil(t, hi.remote)
-
-	lh.addrMap = map[uint32][]udpAddr{
-		ip: {*NewUDPAddrFromString("10.1.1.1:4242")},
-	}
-
-	// This should trigger the hostmap to populate the hostinfo
-	blah.handleOutbound(ip, mw, true)
-	assert.NotNil(t, hi.remote)
+	assert.Equal(t, 1, hi.HandshakeCounter, "Trigger should have not done a handshake attempt")
 	assert.Equal(t, 1, testCountTimerWheelEntries(blah.OutboundHandshakeTimer))
 }
 
@@ -153,92 +100,9 @@ func testCountTimerWheelEntries(tw *SystemTimerWheel) (c int) {
 	return c
 }
 
-func Test_NewHandshakeManagerVpnIPcleanup(t *testing.T) {
-	_, tuncidr, _ := net.ParseCIDR("172.1.1.1/24")
-	_, vpncidr, _ := net.ParseCIDR("172.1.1.1/24")
-	_, localrange, _ := net.ParseCIDR("10.1.1.1/24")
-	vpnIP = ip2int(net.ParseIP("172.1.1.2"))
-	preferredRanges := []*net.IPNet{localrange}
-	mw := &mockEncWriter{}
-	mainHM := NewHostMap("test", vpncidr, preferredRanges)
-
-	blah := NewHandshakeManager(tuncidr, preferredRanges, mainHM, &LightHouse{}, &udpConn{}, defaultHandshakeConfig)
-
-	now := time.Now()
-	blah.NextOutboundHandshakeTimerTick(now, mw)
-
-	hostinfo := blah.AddVpnIP(vpnIP)
-	// Pretned we have an index too
-	blah.AddIndexHostInfo(12341234, hostinfo)
-	assert.Contains(t, blah.pendingHostMap.Indexes, uint32(12341234))
-
-	// Jump ahead `HandshakeRetries` ticks. Eviction should happen in pending
-	// but not main hostmap
-	cumulative := time.Duration(0)
-	for i := 1; i <= DefaultHandshakeRetries+2; i++ {
-		cumulative += DefaultHandshakeTryInterval * time.Duration(i)
-		next_tick := now.Add(cumulative)
-		blah.NextOutboundHandshakeTimerTick(next_tick, mw)
-	}
-	/*
-		for i := 0; i <= HandshakeRetries+1; i++ {
-			next_tick := now.Add(cumulative)
-			//l.Infoln(next_tick)
-			blah.NextOutboundHandshakeTimerTick(next_tick)
-		}
-	*/
-	/*
-		for i := 0; i <= HandshakeRetries+1; i++ {
-			next_tick := now.Add(time.Duration(i) * time.Second)
-			blah.NextOutboundHandshakeTimerTick(next_tick)
-		}
-	*/
-
-	/*
-		cumulative += HandshakeTryInterval*time.Duration(HandshakeRetries) + 3
-		next_tick := now.Add(cumulative)
-		l.Infoln(cumulative, next_tick)
-		blah.NextOutboundHandshakeTimerTick(next_tick)
-	*/
-	assert.NotContains(t, blah.pendingHostMap.Hosts, uint32(vpnIP))
-	assert.NotContains(t, blah.pendingHostMap.Indexes, uint32(12341234))
-}
-
-func Test_NewHandshakeManagerIndexcleanup(t *testing.T) {
-	_, tuncidr, _ := net.ParseCIDR("172.1.1.1/24")
-	_, vpncidr, _ := net.ParseCIDR("172.1.1.1/24")
-	_, localrange, _ := net.ParseCIDR("10.1.1.1/24")
-	preferredRanges := []*net.IPNet{localrange}
-	mainHM := NewHostMap("test", vpncidr, preferredRanges)
-
-	blah := NewHandshakeManager(tuncidr, preferredRanges, mainHM, &LightHouse{}, &udpConn{}, defaultHandshakeConfig)
-
-	now := time.Now()
-	blah.NextInboundHandshakeTimerTick(now)
-
-	hostinfo, _ := blah.AddIndex(12341234, &ConnectionState{})
-	// Pretned we have an index too
-	blah.pendingHostMap.AddVpnIPHostInfo(101010, hostinfo)
-	assert.Contains(t, blah.pendingHostMap.Hosts, uint32(101010))
-
-	for i := 1; i <= DefaultHandshakeRetries+2; i++ {
-		next_tick := now.Add(DefaultHandshakeTryInterval * time.Duration(i))
-		blah.NextInboundHandshakeTimerTick(next_tick)
-	}
-
-	next_tick := now.Add(DefaultHandshakeTryInterval*DefaultHandshakeRetries + 3)
-	blah.NextInboundHandshakeTimerTick(next_tick)
-	assert.NotContains(t, blah.pendingHostMap.Hosts, uint32(101010))
-	assert.NotContains(t, blah.pendingHostMap.Indexes, uint32(12341234))
-}
-
 type mockEncWriter struct {
 }
 
 func (mw *mockEncWriter) SendMessageToVpnIp(t NebulaMessageType, st NebulaMessageSubType, vpnIp uint32, p, nb, out []byte) {
 	return
 }
-
-func (mw *mockEncWriter) SendMessageToAll(t NebulaMessageType, st NebulaMessageSubType, vpnIp uint32, p, nb, out []byte) {
-	return
-}

header.go

@@ -54,7 +54,6 @@ var typeMap = map[NebulaMessageType]string{
 }
 
 const (
-	subTypeNone NebulaMessageSubType = 0
 	testRequest NebulaMessageSubType = 0
 	testReply   NebulaMessageSubType = 1
 )

hostmap.go

@@ -1,11 +1,11 @@
 package nebula
 
 import (
-	"encoding/json"
 	"errors"
 	"fmt"
 	"net"
 	"sync"
+	"sync/atomic"
 	"time"
 
 	"github.com/rcrowley/go-metrics"
@@ -15,41 +15,55 @@ import (
 
 //const ProbeLen = 100
 const PromoteEvery = 1000
+const ReQueryEvery = 5000
 const MaxRemotes = 10
 
 // How long we should prevent roaming back to the previous IP.
 // This helps prevent flapping due to packets already in flight
-const RoamingSupressSeconds = 2
+const RoamingSuppressSeconds = 2
 
 type HostMap struct {
 	sync.RWMutex    //Because we concurrently read and write to our maps
 	name            string
 	Indexes         map[uint32]*HostInfo
+	RemoteIndexes   map[uint32]*HostInfo
 	Hosts           map[uint32]*HostInfo
 	preferredRanges []*net.IPNet
 	vpnCIDR         *net.IPNet
-	defaultRoute    uint32
 	unsafeRoutes    *CIDRTree
 	metricsEnabled  bool
+	l               *logrus.Logger
 }
 
 type HostInfo struct {
+	sync.RWMutex
+
 	remote            *udpAddr
-	Remotes           []*HostInfoDest
+	remotes           *RemoteList
 	promoteCounter    uint32
 	ConnectionState   *ConnectionState
-	handshakeStart    time.Time
-	HandshakeReady    bool
-	HandshakeCounter  int
-	HandshakeComplete bool
-	HandshakePacket   map[uint8][]byte
-	packetStore       []*cachedPacket
+	handshakeStart    time.Time        //todo: this an entry in the handshake manager
+	HandshakeReady    bool             //todo: being in the manager means you are ready
+	HandshakeCounter  int              //todo: another handshake manager entry
+	HandshakeComplete bool             //todo: this should go away in favor of ConnectionState.ready
+	HandshakePacket   map[uint8][]byte //todo: this is other handshake manager entry
+	packetStore       []*cachedPacket  //todo: this is other handshake manager entry
 	remoteIndexId     uint32
 	localIndexId      uint32
 	hostId            uint32
 	recvError         int
 	remoteCidr        *CIDRTree
 
+	// lastRebindCount is the other side of Interface.rebindCount, if these values don't match then we need to ask LH
+	// for a punch from the remote end of this tunnel. The goal being to prime their conntrack for our traffic just like
+	// with a handshake
+	lastRebindCount int8
+
+	// lastHandshakeTime records the time the remote side told us about at the stage when the handshake was completed locally
+	// Stage 1 packet will contain it if I am a responder, stage 2 packet if I am an initiator
+	// This is used to avoid an attack where a handshake packet is replayed after some time
+	lastHandshakeTime uint64
+
 	lastRoam       time.Time
 	lastRoamRemote *udpAddr
 }
@@ -63,29 +77,24 @@ type cachedPacket struct {
 
 type packetCallback func(t NebulaMessageType, st NebulaMessageSubType, h *HostInfo, p, nb, out []byte)
 
-type HostInfoDest struct {
-	active bool
-	addr   *udpAddr
-	//probes       [ProbeLen]bool
-	probeCounter int
+type cachedPacketMetrics struct {
+	sent    metrics.Counter
+	dropped metrics.Counter
 }
 
-type Probe struct {
-	Addr    *net.UDPAddr
-	Counter int
-}
-
-func NewHostMap(name string, vpnCIDR *net.IPNet, preferredRanges []*net.IPNet) *HostMap {
+func NewHostMap(l *logrus.Logger, name string, vpnCIDR *net.IPNet, preferredRanges []*net.IPNet) *HostMap {
 	h := map[uint32]*HostInfo{}
 	i := map[uint32]*HostInfo{}
+	r := map[uint32]*HostInfo{}
 	m := HostMap{
 		name:            name,
 		Indexes:         i,
+		RemoteIndexes:   r,
 		Hosts:           h,
 		preferredRanges: preferredRanges,
 		vpnCIDR:         vpnCIDR,
-		defaultRoute:    0,
 		unsafeRoutes:    NewCIDRTree(),
+		l:               l,
 	}
 	return &m
 }
@@ -95,10 +104,12 @@ func (hm *HostMap) EmitStats(name string) {
 	hm.RLock()
 	hostLen := len(hm.Hosts)
 	indexLen := len(hm.Indexes)
+	remoteIndexLen := len(hm.RemoteIndexes)
 	hm.RUnlock()
 
 	metrics.GetOrRegisterGauge("hostmap."+name+".hosts", nil).Update(int64(hostLen))
 	metrics.GetOrRegisterGauge("hostmap."+name+".indexes", nil).Update(int64(indexLen))
+	metrics.GetOrRegisterGauge("hostmap."+name+".remoteIndexes", nil).Update(int64(remoteIndexLen))
 }
 
 func (hm *HostMap) GetIndexByVpnIP(vpnIP uint32) (uint32, error) {
@@ -112,17 +123,6 @@ func (hm *HostMap) GetIndexByVpnIP(vpnIP uint32) (uint32, error) {
 	return 0, errors.New("vpn IP not found")
 }
 
-func (hm *HostMap) GetVpnIPByIndex(index uint32) (uint32, error) {
-	hm.RLock()
-	if i, ok := hm.Indexes[index]; ok {
-		vpnIP := i.hostId
-		hm.RUnlock()
-		return vpnIP, nil
-	}
-	hm.RUnlock()
-	return 0, errors.New("vpn IP not found")
-}
-
 func (hm *HostMap) Add(ip uint32, hostinfo *HostInfo) {
 	hm.Lock()
 	hm.Hosts[ip] = hostinfo
@@ -135,7 +135,6 @@ func (hm *HostMap) AddVpnIP(vpnIP uint32) *HostInfo {
 	if _, ok := hm.Hosts[vpnIP]; !ok {
 		hm.RUnlock()
 		h = &HostInfo{
-			Remotes:         []*HostInfoDest{},
 			promoteCounter:  0,
 			hostId:          vpnIP,
 			HandshakePacket: make(map[uint8][]byte, 0),
@@ -159,43 +158,23 @@ func (hm *HostMap) DeleteVpnIP(vpnIP uint32) {
 	}
 	hm.Unlock()
 
-	if l.Level >= logrus.DebugLevel {
-		l.WithField("hostMap", m{"mapName": hm.name, "vpnIp": IntIp(vpnIP), "mapTotalSize": len(hm.Hosts)}).
+	if hm.l.Level >= logrus.DebugLevel {
+		hm.l.WithField("hostMap", m{"mapName": hm.name, "vpnIp": IntIp(vpnIP), "mapTotalSize": len(hm.Hosts)}).
 			Debug("Hostmap vpnIp deleted")
 	}
 }
 
-func (hm *HostMap) AddIndex(index uint32, ci *ConnectionState) (*HostInfo, error) {
+// Only used by pendingHostMap when the remote index is not initially known
+func (hm *HostMap) addRemoteIndexHostInfo(index uint32, h *HostInfo) {
 	hm.Lock()
-	if _, ok := hm.Indexes[index]; !ok {
-		h := &HostInfo{
-			ConnectionState: ci,
-			Remotes:         []*HostInfoDest{},
-			localIndexId:    index,
-			HandshakePacket: make(map[uint8][]byte, 0),
-		}
-		hm.Indexes[index] = h
-		l.WithField("hostMap", m{"mapName": hm.name, "indexNumber": index, "mapTotalSize": len(hm.Indexes),
-			"hostinfo": m{"existing": false, "localIndexId": h.localIndexId, "hostId": IntIp(h.hostId)}}).
-			Debug("Hostmap index added")
-
-		hm.Unlock()
-		return h, nil
-	}
-	hm.Unlock()
-	return nil, fmt.Errorf("refusing to overwrite existing index: %d", index)
-}
-
-func (hm *HostMap) AddIndexHostInfo(index uint32, h *HostInfo) {
-	hm.Lock()
-	h.localIndexId = index
-	hm.Indexes[index] = h
+	h.remoteIndexId = index
+	hm.RemoteIndexes[index] = h
 	hm.Unlock()
 
-	if l.Level > logrus.DebugLevel {
-		l.WithField("hostMap", m{"mapName": hm.name, "indexNumber": index, "mapTotalSize": len(hm.Indexes),
+	if hm.l.Level > logrus.DebugLevel {
+		hm.l.WithField("hostMap", m{"mapName": hm.name, "indexNumber": index, "mapTotalSize": len(hm.Indexes),
 			"hostinfo": m{"existing": true, "localIndexId": h.localIndexId, "hostId": IntIp(h.hostId)}}).
-			Debug("Hostmap index added")
+			Debug("Hostmap remoteIndex added")
 	}
 }
 
@@ -203,29 +182,101 @@ func (hm *HostMap) AddVpnIPHostInfo(vpnIP uint32, h *HostInfo) {
 	hm.Lock()
 	h.hostId = vpnIP
 	hm.Hosts[vpnIP] = h
+	hm.Indexes[h.localIndexId] = h
+	hm.RemoteIndexes[h.remoteIndexId] = h
 	hm.Unlock()
 
-	if l.Level > logrus.DebugLevel {
-		l.WithField("hostMap", m{"mapName": hm.name, "vpnIp": IntIp(vpnIP), "mapTotalSize": len(hm.Hosts),
+	if hm.l.Level > logrus.DebugLevel {
+		hm.l.WithField("hostMap", m{"mapName": hm.name, "vpnIp": IntIp(vpnIP), "mapTotalSize": len(hm.Hosts),
 			"hostinfo": m{"existing": true, "localIndexId": h.localIndexId, "hostId": IntIp(h.hostId)}}).
 			Debug("Hostmap vpnIp added")
 	}
 }
 
+// This is only called in pendingHostmap, to cleanup an inbound handshake
 func (hm *HostMap) DeleteIndex(index uint32) {
 	hm.Lock()
-	delete(hm.Indexes, index)
-	if len(hm.Indexes) == 0 {
-		hm.Indexes = map[uint32]*HostInfo{}
+	hostinfo, ok := hm.Indexes[index]
+	if ok {
+		delete(hm.Indexes, index)
+		delete(hm.RemoteIndexes, hostinfo.remoteIndexId)
+
+		// Check if we have an entry under hostId that matches the same hostinfo
+		// instance. Clean it up as well if we do.
+		hostinfo2, ok := hm.Hosts[hostinfo.hostId]
+		if ok && hostinfo2 == hostinfo {
+			delete(hm.Hosts, hostinfo.hostId)
+		}
 	}
 	hm.Unlock()
 
-	if l.Level >= logrus.DebugLevel {
-		l.WithField("hostMap", m{"mapName": hm.name, "indexNumber": index, "mapTotalSize": len(hm.Indexes)}).
+	if hm.l.Level >= logrus.DebugLevel {
+		hm.l.WithField("hostMap", m{"mapName": hm.name, "indexNumber": index, "mapTotalSize": len(hm.Indexes)}).
 			Debug("Hostmap index deleted")
 	}
 }
 
+// This is used to cleanup on recv_error
+func (hm *HostMap) DeleteReverseIndex(index uint32) {
+	hm.Lock()
+	hostinfo, ok := hm.RemoteIndexes[index]
+	if ok {
+		delete(hm.Indexes, hostinfo.localIndexId)
+		delete(hm.RemoteIndexes, index)
+
+		// Check if we have an entry under hostId that matches the same hostinfo
+		// instance. Clean it up as well if we do (they might not match in pendingHostmap)
+		var hostinfo2 *HostInfo
+		hostinfo2, ok = hm.Hosts[hostinfo.hostId]
+		if ok && hostinfo2 == hostinfo {
+			delete(hm.Hosts, hostinfo.hostId)
+		}
+	}
+	hm.Unlock()
+
+	if hm.l.Level >= logrus.DebugLevel {
+		hm.l.WithField("hostMap", m{"mapName": hm.name, "indexNumber": index, "mapTotalSize": len(hm.Indexes)}).
+			Debug("Hostmap remote index deleted")
+	}
+}
+
+func (hm *HostMap) DeleteHostInfo(hostinfo *HostInfo) {
+	hm.Lock()
+	defer hm.Unlock()
+	hm.unlockedDeleteHostInfo(hostinfo)
+}
+
+func (hm *HostMap) unlockedDeleteHostInfo(hostinfo *HostInfo) {
+	// Check if this same hostId is in the hostmap with a different instance.
+	// This could happen if we have an entry in the pending hostmap with different
+	// index values than the one in the main hostmap.
+	hostinfo2, ok := hm.Hosts[hostinfo.hostId]
+	if ok && hostinfo2 != hostinfo {
+		delete(hm.Hosts, hostinfo2.hostId)
+		delete(hm.Indexes, hostinfo2.localIndexId)
+		delete(hm.RemoteIndexes, hostinfo2.remoteIndexId)
+	}
+
+	delete(hm.Hosts, hostinfo.hostId)
+	if len(hm.Hosts) == 0 {
+		hm.Hosts = map[uint32]*HostInfo{}
+	}
+	delete(hm.Indexes, hostinfo.localIndexId)
+	if len(hm.Indexes) == 0 {
+		hm.Indexes = map[uint32]*HostInfo{}
+	}
+	delete(hm.RemoteIndexes, hostinfo.remoteIndexId)
+	if len(hm.RemoteIndexes) == 0 {
+		hm.RemoteIndexes = map[uint32]*HostInfo{}
+	}
+
+	if hm.l.Level >= logrus.DebugLevel {
+		hm.l.WithField("hostMap", m{"mapName": hm.name, "mapTotalSize": len(hm.Hosts),
+			"vpnIp": IntIp(hostinfo.hostId), "indexNumber": hostinfo.localIndexId, "remoteIndexNumber": hostinfo.remoteIndexId}).
+			Debug("Hostmap hostInfo deleted")
+	}
+}
+
 func (hm *HostMap) QueryIndex(index uint32) (*HostInfo, error) {
 	//TODO: we probably just want ot return bool instead of error, or at least a static error
 	hm.RLock()
@@ -238,45 +289,15 @@ func (hm *HostMap) QueryIndex(index uint32) (*HostInfo, error) {
 	}
 }
 
-// This function needs to range because we don't keep a map of remote indexes.
 func (hm *HostMap) QueryReverseIndex(index uint32) (*HostInfo, error) {
 	hm.RLock()
-	for _, h := range hm.Indexes {
-		if h.ConnectionState != nil && h.remoteIndexId == index {
-			hm.RUnlock()
-			return h, nil
-		}
-	}
-	for _, h := range hm.Hosts {
-		if h.ConnectionState != nil && h.remoteIndexId == index {
-			hm.RUnlock()
-			return h, nil
-		}
-	}
-	hm.RUnlock()
-	return nil, fmt.Errorf("unable to find reverse index or connectionstate nil in %s hostmap", hm.name)
-}
-
-func (hm *HostMap) AddRemote(vpnIp uint32, remote *udpAddr) *HostInfo {
-	hm.Lock()
-	i, v := hm.Hosts[vpnIp]
-	if v {
-		i.AddRemote(*remote)
+	if h, ok := hm.RemoteIndexes[index]; ok {
+		hm.RUnlock()
+		return h, nil
 	} else {
-		i = &HostInfo{
-			Remotes:         []*HostInfoDest{NewHostInfoDest(remote)},
-			promoteCounter:  0,
-			hostId:          vpnIp,
-			HandshakePacket: make(map[uint8][]byte, 0),
-		}
-		i.remote = i.Remotes[0].addr
-		hm.Hosts[vpnIp] = i
-		l.WithField("hostMap", m{"mapName": hm.name, "vpnIp": IntIp(vpnIp), "udpAddr": remote, "mapTotalSize": len(hm.Hosts)}).
-			Debug("Hostmap remote ip added")
+		hm.RUnlock()
+		return nil, fmt.Errorf("unable to find reverse index or connectionstate nil in %s hostmap", hm.name)
 	}
-	i.ForcePromoteBest(hm.preferredRanges)
-	hm.Unlock()
-	return i
 }
 
 func (hm *HostMap) QueryVpnIP(vpnIp uint32) (*HostInfo, error) {
@@ -292,23 +313,17 @@ func (hm *HostMap) PromoteBestQueryVpnIP(vpnIp uint32, ifce *Interface) (*HostIn
 func (hm *HostMap) queryVpnIP(vpnIp uint32, promoteIfce *Interface) (*HostInfo, error) {
 	hm.RLock()
 	if h, ok := hm.Hosts[vpnIp]; ok {
-		if promoteIfce != nil {
+		hm.RUnlock()
+		// Do not attempt promotion if you are a lighthouse
+		if promoteIfce != nil && !promoteIfce.lightHouse.amLighthouse {
 			h.TryPromoteBest(hm.preferredRanges, promoteIfce)
 		}
-		//fmt.Println(h.remote)
-		hm.RUnlock()
 		return h, nil
-	} else {
-		//return &net.UDPAddr{}, nil, errors.New("Unable to find host")
-		hm.RUnlock()
-		/*
-			if lightHouse != nil {
-				lightHouse.Query(vpnIp)
-				return nil, errors.New("Unable to find host")
-			}
-		*/
-		return nil, errors.New("unable to find host")
+
 	}
+
+	hm.RUnlock()
+	return nil, errors.New("unable to find host")
 }
 
 func (hm *HostMap) queryUnsafeRoute(ip uint32) uint32 {
@@ -320,70 +335,40 @@ func (hm *HostMap) queryUnsafeRoute(ip uint32) uint32 {
 	}
 }
 
-func (hm *HostMap) CheckHandshakeCompleteIP(vpnIP uint32) bool {
-	hm.RLock()
-	if i, ok := hm.Hosts[vpnIP]; ok {
-		if i == nil {
-			hm.RUnlock()
-			return false
-		}
-		complete := i.HandshakeComplete
-		hm.RUnlock()
-		return complete
-
+// We already have the hm Lock when this is called, so make sure to not call
+// any other methods that might try to grab it again
+func (hm *HostMap) addHostInfo(hostinfo *HostInfo, f *Interface) {
+	if f.serveDns {
+		remoteCert := hostinfo.ConnectionState.peerCert
+		dnsR.Add(remoteCert.Details.Name+".", remoteCert.Details.Ips[0].IP.String())
 	}
-	hm.RUnlock()
-	return false
-}
 
-func (hm *HostMap) CheckHandshakeCompleteIndex(index uint32) bool {
-	hm.RLock()
-	if i, ok := hm.Indexes[index]; ok {
-		if i == nil {
-			hm.RUnlock()
-			return false
-		}
-		complete := i.HandshakeComplete
-		hm.RUnlock()
-		return complete
+	hm.Hosts[hostinfo.hostId] = hostinfo
+	hm.Indexes[hostinfo.localIndexId] = hostinfo
+	hm.RemoteIndexes[hostinfo.remoteIndexId] = hostinfo
 
+	if hm.l.Level >= logrus.DebugLevel {
+		hm.l.WithField("hostMap", m{"mapName": hm.name, "vpnIp": IntIp(hostinfo.hostId), "mapTotalSize": len(hm.Hosts),
+			"hostinfo": m{"existing": true, "localIndexId": hostinfo.localIndexId, "hostId": IntIp(hostinfo.hostId)}}).
+			Debug("Hostmap vpnIp added")
 	}
-	hm.RUnlock()
-	return false
 }
 
-func (hm *HostMap) ClearRemotes(vpnIP uint32) {
-	hm.Lock()
-	i := hm.Hosts[vpnIP]
-	if i == nil {
-		hm.Unlock()
-		return
-	}
-	i.remote = nil
-	i.Remotes = nil
-	hm.Unlock()
-}
-
-func (hm *HostMap) SetDefaultRoute(ip uint32) {
-	hm.defaultRoute = ip
-}
-
-func (hm *HostMap) PunchList() []*udpAddr {
-	var list []*udpAddr
+// punchList assembles a list of all non nil RemoteList pointer entries in this hostmap
+// The caller can then do the its work outside of the read lock
+func (hm *HostMap) punchList(rl []*RemoteList) []*RemoteList {
 	hm.RLock()
+	defer hm.RUnlock()
+
 	for _, v := range hm.Hosts {
-		for _, r := range v.Remotes {
-			list = append(list, r.addr)
+		if v.remotes != nil {
+			rl = append(rl, v.remotes)
 		}
-		//	if h, ok := hm.Hosts[vpnIp]; ok {
-		//		hm.Hosts[vpnIp].PromoteBest(hm.preferredRanges, false)
-		//fmt.Println(h.remote)
-		//	}
 	}
-	hm.RUnlock()
-	return list
+	return rl
 }
 
+// Punchy iterates through the result of punchList() to assemble all known addresses and sends a hole punch packet to them
 func (hm *HostMap) Punchy(conn *udpConn) {
 	var metricsTxPunchy metrics.Counter
 	if hm.metricsEnabled {
@@ -392,162 +377,83 @@ func (hm *HostMap) Punchy(conn *udpConn) {
 		metricsTxPunchy = metrics.NilCounter{}
 	}
 
+	var remotes []*RemoteList
+	b := []byte{1}
 	for {
-		for _, addr := range hm.PunchList() {
-			metricsTxPunchy.Inc(1)
-			conn.WriteTo([]byte{1}, addr)
+		remotes = hm.punchList(remotes[:0])
+		for _, rl := range remotes {
+			//TODO: CopyAddrs generates garbage but ForEach locks for the work here, figure out which way is better
+			for _, addr := range rl.CopyAddrs(hm.preferredRanges) {
+				metricsTxPunchy.Inc(1)
+				conn.WriteTo(b, addr)
+			}
 		}
-		time.Sleep(time.Second * 30)
+		time.Sleep(time.Second * 10)
 	}
 }
 
 func (hm *HostMap) addUnsafeRoutes(routes *[]route) {
 	for _, r := range *routes {
-		l.WithField("route", r.route).WithField("via", r.via).Warn("Adding UNSAFE Route")
+		hm.l.WithField("route", r.route).WithField("via", r.via).Warn("Adding UNSAFE Route")
 		hm.unsafeRoutes.AddCIDR(r.route, ip2int(*r.via))
 	}
 }
 
-func (i *HostInfo) MarshalJSON() ([]byte, error) {
-	return json.Marshal(m{
-		"remote":             i.remote,
-		"remotes":            i.Remotes,
-		"promote_counter":    i.promoteCounter,
-		"connection_state":   i.ConnectionState,
-		"handshake_start":    i.handshakeStart,
-		"handshake_ready":    i.HandshakeReady,
-		"handshake_counter":  i.HandshakeCounter,
-		"handshake_complete": i.HandshakeComplete,
-		"handshake_packet":   i.HandshakePacket,
-		"packet_store":       i.packetStore,
-		"remote_index":       i.remoteIndexId,
-		"local_index":        i.localIndexId,
-		"host_id":            int2ip(i.hostId),
-		"receive_errors":     i.recvError,
-		"last_roam":          i.lastRoam,
-		"last_roam_remote":   i.lastRoamRemote,
-	})
-}
-
 func (i *HostInfo) BindConnectionState(cs *ConnectionState) {
 	i.ConnectionState = cs
 }
 
+// TryPromoteBest handles re-querying lighthouses and probing for better paths
+// NOTE: It is an error to call this if you are a lighthouse since they should not roam clients!
 func (i *HostInfo) TryPromoteBest(preferredRanges []*net.IPNet, ifce *Interface) {
-	if i.remote == nil {
-		i.ForcePromoteBest(preferredRanges)
-		return
-	}
+	c := atomic.AddUint32(&i.promoteCounter, 1)
+	if c%PromoteEvery == 0 {
+		// The lock here is currently protecting i.remote access
+		i.RLock()
+		defer i.RUnlock()
 
-	i.promoteCounter++
-	if i.promoteCounter%PromoteEvery == 0 {
 		// return early if we are already on a preferred remote
-		rIP := udp2ip(i.remote)
+		rIP := i.remote.IP
 		for _, l := range preferredRanges {
 			if l.Contains(rIP) {
 				return
 			}
 		}
 
-		// We re-query the lighthouse periodically while sending packets, so
-		// check for new remotes in our local lighthouse cache
-		ips := ifce.lightHouse.QueryCache(i.hostId)
-		for _, ip := range ips {
-			i.AddRemote(ip)
-		}
+		i.remotes.ForEach(preferredRanges, func(addr *udpAddr, preferred bool) {
+			if addr == nil || !preferred {
+				return
+			}
 
-		best, preferred := i.getBestRemote(preferredRanges)
-		if preferred && !best.Equals(i.remote) {
 			// Try to send a test packet to that host, this should
 			// cause it to detect a roaming event and switch remotes
-			ifce.send(test, testRequest, i.ConnectionState, i, best, []byte(""), make([]byte, 12, 12), make([]byte, mtu))
-		}
+			ifce.send(test, testRequest, i.ConnectionState, i, addr, []byte(""), make([]byte, 12, 12), make([]byte, mtu))
+		})
+	}
+
+	// Re query our lighthouses for new remotes occasionally
+	if c%ReQueryEvery == 0 && ifce.lightHouse != nil {
+		ifce.lightHouse.QueryServer(i.hostId, ifce)
 	}
 }
 
-func (i *HostInfo) ForcePromoteBest(preferredRanges []*net.IPNet) {
-	best, _ := i.getBestRemote(preferredRanges)
-	if best != nil {
-		i.remote = best
-	}
-}
-
-func (i *HostInfo) getBestRemote(preferredRanges []*net.IPNet) (best *udpAddr, preferred bool) {
-	if len(i.Remotes) > 0 {
-		for _, r := range i.Remotes {
-			rIP := udp2ip(r.addr)
-
-			for _, l := range preferredRanges {
-				if l.Contains(rIP) {
-					return r.addr, true
-				}
-			}
-
-			if best == nil || !PrivateIP(rIP) {
-				best = r.addr
-			}
-			/*
-				for _, r := range i.Remotes {
-					// Must have > 80% probe success to be considered.
-					//fmt.Println("GRADE:", r.addr.IP, r.Grade())
-					if r.Grade() > float64(.8) {
-						if localToMe.Contains(r.addr.IP) == true {
-							best = r.addr
-							break
-							//i.remote = i.Remotes[c].addr
-						} else {
-								//}
-					}
-			*/
-		}
-		return best, false
-	}
-
-	return nil, false
-}
-
-// rotateRemote will move remote to the next ip in the list of remote ips for this host
-// This is different than PromoteBest in that what is algorithmically best may not actually work.
-// Only known use case is when sending a stage 0 handshake.
-// It may be better to just send stage 0 handshakes to all known ips and sort it out in the receiver.
-func (i *HostInfo) rotateRemote() {
-	// We have 0, can't rotate
-	if len(i.Remotes) < 1 {
-		return
-	}
-
-	if i.remote == nil {
-		i.remote = i.Remotes[0].addr
-		return
-	}
-
-	// We want to look at all but the very last entry since that is handled at the end
-	for x := 0; x < len(i.Remotes)-1; x++ {
-		// Find our current position and move to the next one in the list
-		if i.Remotes[x].addr.Equals(i.remote) {
-			i.remote = i.Remotes[x+1].addr
-			return
-		}
-	}
-
-	// Our current position was likely the last in the list, start over at 0
-	i.remote = i.Remotes[0].addr
-}
-
-func (i *HostInfo) cachePacket(t NebulaMessageType, st NebulaMessageSubType, packet []byte, f packetCallback) {
+func (i *HostInfo) cachePacket(l *logrus.Logger, t NebulaMessageType, st NebulaMessageSubType, packet []byte, f packetCallback, m *cachedPacketMetrics) {
 	//TODO: return the error so we can log with more context
 	if len(i.packetStore) < 100 {
 		tempPacket := make([]byte, len(packet))
 		copy(tempPacket, packet)
 		//l.WithField("trace", string(debug.Stack())).Error("Caching packet", tempPacket)
 		i.packetStore = append(i.packetStore, &cachedPacket{t, st, f, tempPacket})
-		i.logger().
-			WithField("length", len(i.packetStore)).
-			WithField("stored", true).
-			Debugf("Packet store")
+		if l.Level >= logrus.DebugLevel {
+			i.logger(l).
+				WithField("length", len(i.packetStore)).
+				WithField("stored", true).
+				Debugf("Packet store")
+		}
 
 	} else if l.Level >= logrus.DebugLevel {
-		i.logger().
+		m.dropped.Inc(1)
+		i.logger(l).
 			WithField("length", len(i.packetStore)).
 			WithField("stored", false).
 			Debugf("Packet store")
@@ -555,7 +461,7 @@ func (i *HostInfo) cachePacket(t NebulaMessageType, st NebulaMessageSubType, pac
 }
 
 // handshakeComplete will set the connection as ready to communicate, as well as flush any stored packets
-func (i *HostInfo) handshakeComplete() {
+func (i *HostInfo) handshakeComplete(l *logrus.Logger, m *cachedPacketMetrics) {
 	//TODO: I'm not certain the distinction between handshake complete and ConnectionState being ready matters because:
 	//TODO: HandshakeComplete means send stored packets and ConnectionState.ready means we are ready to send
 	//TODO: if the transition from HandhsakeComplete to ConnectionState.ready happens all within this function they are identical
@@ -564,27 +470,28 @@ func (i *HostInfo) handshakeComplete() {
 	i.HandshakeComplete = true
 	//TODO: this should be managed by the handshake state machine to set it based on how many handshake were seen.
 	// Clamping it to 2 gets us out of the woods for now
-	*i.ConnectionState.messageCounter = 2
-	i.logger().Debugf("Sending %d stored packets", len(i.packetStore))
-	nb := make([]byte, 12, 12)
-	out := make([]byte, mtu)
-	for _, cp := range i.packetStore {
-		cp.callback(cp.messageType, cp.messageSubType, i, cp.packet, nb, out)
+	atomic.StoreUint64(&i.ConnectionState.atomicMessageCounter, 2)
+
+	if l.Level >= logrus.DebugLevel {
+		i.logger(l).Debugf("Sending %d stored packets", len(i.packetStore))
 	}
+
+	if len(i.packetStore) > 0 {
+		nb := make([]byte, 12, 12)
+		out := make([]byte, mtu)
+		for _, cp := range i.packetStore {
+			cp.callback(cp.messageType, cp.messageSubType, i, cp.packet, nb, out)
+		}
+		m.sent.Inc(int64(len(i.packetStore)))
+	}
+
+	i.remotes.ResetBlockedRemotes()
 	i.packetStore = make([]*cachedPacket, 0)
 	i.ConnectionState.ready = true
 	i.ConnectionState.queueLock.Unlock()
 	i.ConnectionState.certState = nil
 }
 
-func (i *HostInfo) RemoteUDPAddrs() []*udpAddr {
-	var addrs []*udpAddr
-	for _, r := range i.Remotes {
-		addrs = append(addrs, r.addr)
-	}
-	return addrs
-}
-
 func (i *HostInfo) GetCert() *cert.NebulaCertificate {
 	if i.ConnectionState != nil {
 		return i.ConnectionState.peerCert
@@ -592,31 +499,12 @@ func (i *HostInfo) GetCert() *cert.NebulaCertificate {
 	return nil
 }
 
-func (i *HostInfo) AddRemote(r udpAddr) *udpAddr {
-	remote := &r
-	//add := true
-	for _, r := range i.Remotes {
-		if r.addr.Equals(remote) {
-			return r.addr
-			//add = false
-		}
+func (i *HostInfo) SetRemote(remote *udpAddr) {
+	// We copy here because we likely got this remote from a source that reuses the object
+	if !i.remote.Equals(remote) {
+		i.remote = remote.Copy()
+		i.remotes.LearnRemote(i.hostId, remote.Copy())
 	}
-	// Trim this down if necessary
-	if len(i.Remotes) > MaxRemotes {
-		i.Remotes = i.Remotes[len(i.Remotes)-MaxRemotes:]
-	}
-	i.Remotes = append(i.Remotes, NewHostInfoDest(remote))
-	return remote
-	//l.Debugf("Added remote %s for vpn ip", remote)
-}
-
-func (i *HostInfo) SetRemote(remote udpAddr) {
-	i.remote = i.AddRemote(remote)
-}
-
-func (i *HostInfo) ClearRemotes() {
-	i.remote = nil
-	i.Remotes = []*HostInfoDest{}
 }
 
 func (i *HostInfo) ClearConnectionState() {
@@ -648,7 +536,7 @@ func (i *HostInfo) CreateRemoteCIDR(c *cert.NebulaCertificate) {
 	i.remoteCidr = remoteCidr
 }
 
-func (i *HostInfo) logger() *logrus.Entry {
+func (i *HostInfo) logger(l *logrus.Logger) *logrus.Entry {
 	if i == nil {
 		return logrus.NewEntry(l)
 	}
@@ -666,21 +554,6 @@ func (i *HostInfo) logger() *logrus.Entry {
 
 //########################
 
-func NewHostInfoDest(addr *udpAddr) *HostInfoDest {
-	i := &HostInfoDest{
-		addr: addr,
-	}
-	return i
-}
-
-func (hid *HostInfoDest) MarshalJSON() ([]byte, error) {
-	return json.Marshal(m{
-		"active":      hid.active,
-		"address":     hid.addr,
-		"probe_count": hid.probeCounter,
-	})
-}
-
 /*
 
 func (hm *HostMap) DebugRemotes(vpnIp uint32) string {
@@ -693,40 +566,6 @@ func (hm *HostMap) DebugRemotes(vpnIp uint32) string {
 	return s
 }
 
-
-func (d *HostInfoDest) Grade() float64 {
-	c1 := ProbeLen
-	for n := len(d.probes) - 1; n >= 0; n-- {
-		if d.probes[n] == true {
-			c1 -= 1
-		}
-	}
-	return float64(c1) / float64(ProbeLen)
-}
-
-func (d *HostInfoDest) Grade() (float64, float64, float64) {
-	c1 := ProbeLen
-	c2 := ProbeLen / 2
-	c2c := ProbeLen - ProbeLen/2
-	c3 := ProbeLen / 5
-	c3c := ProbeLen - ProbeLen/5
-	for n := len(d.probes) - 1; n >= 0; n-- {
-		if d.probes[n] == true {
-			c1 -= 1
-			if n >= c2c {
-				c2 -= 1
-				if n >= c3c {
-					c3 -= 1
-				}
-			}
-		}
-		//if n >= d {
-	}
-	return float64(c3) / float64(ProbeLen/5), float64(c2) / float64(ProbeLen/2), float64(c1) / float64(ProbeLen)
-	//return float64(c1) / float64(ProbeLen), float64(c2) / float64(ProbeLen/2), float64(c3) / float64(ProbeLen/5)
-}
-
-
 func (i *HostInfo) HandleReply(addr *net.UDPAddr, counter int) {
 	for _, r := range i.Remotes {
 		if r.addr.IP.Equal(addr.IP) && r.addr.Port == addr.Port {
@@ -743,34 +582,20 @@ func (i *HostInfo) Probes() []*Probe {
 	return p
 }
 
-
-func (d *HostInfoDest) Probe() int {
-	//d.probes = append(d.probes, true)
-	d.probeCounter++
-	d.probes[d.probeCounter%ProbeLen] = true
-	return d.probeCounter
-	//return d.probeCounter
-}
-
-func (d *HostInfoDest) ProbeReceived(probeCount int) {
-	if probeCount >= (d.probeCounter - ProbeLen) {
-		//fmt.Println("PROBE WORKED", probeCount)
-		//fmt.Println(d.addr, d.Grade())
-		d.probes[probeCount%ProbeLen] = false
-	}
-}
-
 */
 
 // Utility functions
 
-func localIps(allowList *AllowList) *[]net.IP {
+func localIps(l *logrus.Logger, allowList *AllowList) *[]net.IP {
 	//FIXME: This function is pretty garbage
 	var ips []net.IP
 	ifaces, _ := net.Interfaces()
 	for _, i := range ifaces {
 		allow := allowList.AllowName(i.Name)
-		l.WithField("interfaceName", i.Name).WithField("allow", allow).Debug("localAllowList.AllowName")
+		if l.Level >= logrus.TraceLevel {
+			l.WithField("interfaceName", i.Name).WithField("allow", allow).Trace("localAllowList.AllowName")
+		}
+
 		if !allow {
 			continue
 		}
@@ -784,9 +609,14 @@ func localIps(allowList *AllowList) *[]net.IP {
 			case *net.IPAddr:
 				ip = v.IP
 			}
-			if ip.To4() != nil && ip.IsLoopback() == false {
-				allow := allowList.Allow(ip2int(ip))
-				l.WithField("localIp", ip).WithField("allow", allow).Debug("localAllowList.Allow")
+
+			//TODO: Filtering out link local for now, this is probably the most correct thing
+			//TODO: Would be nice to filter out SLAAC MAC based ips as well
+			if ip.IsLoopback() == false && !ip.IsLinkLocalUnicast() {
+				allow := allowList.Allow(ip)
+				if l.Level >= logrus.TraceLevel {
+					l.WithField("localIp", ip).WithField("allow", allow).Trace("localAllowList.Allow")
+				}
 				if !allow {
 					continue
 				}
@@ -797,12 +627,3 @@ func localIps(allowList *AllowList) *[]net.IP {
 	}
 	return &ips
 }
-
-func PrivateIP(ip net.IP) bool {
-	private := false
-	_, private24BitBlock, _ := net.ParseCIDR("10.0.0.0/8")
-	_, private20BitBlock, _ := net.ParseCIDR("172.16.0.0/12")
-	_, private16BitBlock, _ := net.ParseCIDR("192.168.0.0/16")
-	private = private24BitBlock.Contains(ip) || private20BitBlock.Contains(ip) || private16BitBlock.Contains(ip)
-	return private
-}

hostmap_test.go

@@ -1,164 +1 @@
 package nebula
-
-import (
-	"net"
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-)
-
-/*
-func TestHostInfoDestProbe(t *testing.T) {
-	a, _ := net.ResolveUDPAddr("udp", "1.0.0.1:22222")
-	d := NewHostInfoDest(a)
-
-	// 999 probes that all return should give a 100% success rate
-	for i := 0; i < 999; i++ {
-		meh := d.Probe()
-		d.ProbeReceived(meh)
-	}
-	assert.Equal(t, d.Grade(), float64(1))
-
-	// 999 probes of which only half return should give a 50% success rate
-	for i := 0; i < 999; i++ {
-		meh := d.Probe()
-		if i%2 == 0 {
-			d.ProbeReceived(meh)
-		}
-	}
-	assert.Equal(t, d.Grade(), float64(.5))
-
-	// 999 probes of which none return should give a 0% success rate
-	for i := 0; i < 999; i++ {
-		d.Probe()
-	}
-	assert.Equal(t, d.Grade(), float64(0))
-
-	// 999 probes of which only 1/4 return should give a 25% success rate
-	for i := 0; i < 999; i++ {
-		meh := d.Probe()
-		if i%4 == 0 {
-			d.ProbeReceived(meh)
-		}
-	}
-	assert.Equal(t, d.Grade(), float64(.25))
-
-	// 999 probes of which only half return and are duplicates should give a 50% success rate
-	for i := 0; i < 999; i++ {
-		meh := d.Probe()
-		if i%2 == 0 {
-			d.ProbeReceived(meh)
-			d.ProbeReceived(meh)
-		}
-	}
-	assert.Equal(t, d.Grade(), float64(.5))
-
-	// 999 probes of which only way old replies return should give a 0% success rate
-	for i := 0; i < 999; i++ {
-		meh := d.Probe()
-		d.ProbeReceived(meh - 101)
-	}
-	assert.Equal(t, d.Grade(), float64(0))
-
-}
-*/
-
-func TestHostmap(t *testing.T) {
-	_, myNet, _ := net.ParseCIDR("10.128.0.0/16")
-	_, localToMe, _ := net.ParseCIDR("192.168.1.0/24")
-	myNets := []*net.IPNet{myNet}
-	preferredRanges := []*net.IPNet{localToMe}
-
-	m := NewHostMap("test", myNet, preferredRanges)
-
-	a := NewUDPAddrFromString("10.127.0.3:11111")
-	b := NewUDPAddrFromString("1.0.0.1:22222")
-	y := NewUDPAddrFromString("10.128.0.3:11111")
-	m.AddRemote(ip2int(net.ParseIP("10.128.1.1")), a)
-	m.AddRemote(ip2int(net.ParseIP("10.128.1.1")), b)
-	m.AddRemote(ip2int(net.ParseIP("10.128.1.1")), y)
-
-	info, _ := m.QueryVpnIP(ip2int(net.ParseIP("10.128.1.1")))
-
-	// There should be three remotes in the host map
-	assert.Equal(t, 3, len(info.Remotes))
-
-	// Adding an identical remote should not change the count
-	m.AddRemote(ip2int(net.ParseIP("10.128.1.1")), y)
-	assert.Equal(t, 3, len(info.Remotes))
-
-	// Adding a fresh remote should add one
-	y = NewUDPAddrFromString("10.18.0.3:11111")
-	m.AddRemote(ip2int(net.ParseIP("10.128.1.1")), y)
-	assert.Equal(t, 4, len(info.Remotes))
-
-	// Query and reference remote should get the first one (and not nil)
-	info, _ = m.QueryVpnIP(ip2int(net.ParseIP("10.128.1.1")))
-	assert.NotNil(t, info.remote)
-
-	// Promotion should ensure that the best remote is chosen (y)
-	info.ForcePromoteBest(myNets)
-	assert.True(t, myNet.Contains(udp2ip(info.remote)))
-
-}
-
-func TestHostmapdebug(t *testing.T) {
-	_, myNet, _ := net.ParseCIDR("10.128.0.0/16")
-	_, localToMe, _ := net.ParseCIDR("192.168.1.0/24")
-	preferredRanges := []*net.IPNet{localToMe}
-	m := NewHostMap("test", myNet, preferredRanges)
-
-	a := NewUDPAddrFromString("10.127.0.3:11111")
-	b := NewUDPAddrFromString("1.0.0.1:22222")
-	y := NewUDPAddrFromString("10.128.0.3:11111")
-	m.AddRemote(ip2int(net.ParseIP("10.128.1.1")), a)
-	m.AddRemote(ip2int(net.ParseIP("10.128.1.1")), b)
-	m.AddRemote(ip2int(net.ParseIP("10.128.1.1")), y)
-
-	//t.Errorf("%s", m.DebugRemotes(1))
-}
-
-func TestHostMap_rotateRemote(t *testing.T) {
-	h := HostInfo{}
-	// 0 remotes, no panic
-	h.rotateRemote()
-	assert.Nil(t, h.remote)
-
-	// 1 remote, no panic
-	h.AddRemote(*NewUDPAddr(ip2int(net.IP{1, 1, 1, 1}), 0))
-	h.rotateRemote()
-	assert.Equal(t, udp2ipInt(h.remote), ip2int(net.IP{1, 1, 1, 1}))
-
-	h.AddRemote(*NewUDPAddr(ip2int(net.IP{1, 1, 1, 2}), 0))
-	h.AddRemote(*NewUDPAddr(ip2int(net.IP{1, 1, 1, 3}), 0))
-	h.AddRemote(*NewUDPAddr(ip2int(net.IP{1, 1, 1, 4}), 0))
-
-	// Rotate through those 3
-	h.rotateRemote()
-	assert.Equal(t, udp2ipInt(h.remote), ip2int(net.IP{1, 1, 1, 2}))
-
-	h.rotateRemote()
-	assert.Equal(t, udp2ipInt(h.remote), ip2int(net.IP{1, 1, 1, 3}))
-
-	h.rotateRemote()
-	assert.Equal(t, udp2ipInt(h.remote), ip2int(net.IP{1, 1, 1, 4}))
-
-	// Finally, we should start over
-	h.rotateRemote()
-	assert.Equal(t, udp2ipInt(h.remote), ip2int(net.IP{1, 1, 1, 1}))
-}
-
-func BenchmarkHostmappromote2(b *testing.B) {
-	for n := 0; n < b.N; n++ {
-		_, myNet, _ := net.ParseCIDR("10.128.0.0/16")
-		_, localToMe, _ := net.ParseCIDR("192.168.1.0/24")
-		preferredRanges := []*net.IPNet{localToMe}
-		m := NewHostMap("test", myNet, preferredRanges)
-		y := NewUDPAddrFromString("10.128.0.3:11111")
-		a := NewUDPAddrFromString("10.127.0.3:11111")
-		g := NewUDPAddrFromString("1.0.0.1:22222")
-		m.AddRemote(ip2int(net.ParseIP("10.128.1.1")), a)
-		m.AddRemote(ip2int(net.ParseIP("10.128.1.1")), g)
-		m.AddRemote(ip2int(net.ParseIP("10.128.1.1")), y)
-	}
-}

inside.go

@@ -7,10 +7,10 @@ import (
 	"github.com/sirupsen/logrus"
 )
 
-func (f *Interface) consumeInsidePacket(st NebulaMessageSubType, packet []byte, fwPacket *FirewallPacket, nb, out []byte) {
+func (f *Interface) consumeInsidePacket(packet []byte, fwPacket *FirewallPacket, nb, out []byte, q int, localCache ConntrackCache) {
 	err := newPacket(packet, false, fwPacket)
 	if err != nil {
-		l.WithField("packet", packet).Debugf("Error while validating outbound packet: %s", err)
+		f.l.WithField("packet", packet).Debugf("Error while validating outbound packet: %s", err)
 		return
 	}
 
@@ -20,7 +20,7 @@ func (f *Interface) consumeInsidePacket(st NebulaMessageSubType, packet []byte,
 	}
 
 	// Ignore packets from self to self
-	if fwPacket.RemoteIP == f.lightHouse.myIp {
+	if fwPacket.RemoteIP == f.myVpnIp {
 		return
 	}
 
@@ -31,8 +31,8 @@ func (f *Interface) consumeInsidePacket(st NebulaMessageSubType, packet []byte,
 
 	hostinfo := f.getOrHandshake(fwPacket.RemoteIP)
 	if hostinfo == nil {
-		if l.Level >= logrus.DebugLevel {
-			l.WithField("vpnIp", IntIp(fwPacket.RemoteIP)).
+		if f.l.Level >= logrus.DebugLevel {
+			f.l.WithField("vpnIp", IntIp(fwPacket.RemoteIP)).
 				WithField("fwPacket", fwPacket).
 				Debugln("dropping outbound packet, vpnIp not in our CIDR or in unsafe routes")
 		}
@@ -45,22 +45,19 @@ func (f *Interface) consumeInsidePacket(st NebulaMessageSubType, packet []byte,
 		// the packet queue.
 		ci.queueLock.Lock()
 		if !ci.ready {
-			hostinfo.cachePacket(message, st, packet, f.sendMessageNow)
+			hostinfo.cachePacket(f.l, message, 0, packet, f.sendMessageNow, f.cachedPacketMetrics)
 			ci.queueLock.Unlock()
 			return
 		}
 		ci.queueLock.Unlock()
 	}
 
-	dropReason := f.firewall.Drop(packet, *fwPacket, false, hostinfo, trustedCAs)
+	dropReason := f.firewall.Drop(packet, *fwPacket, false, hostinfo, f.caPool, localCache)
 	if dropReason == nil {
-		mc := f.sendNoMetrics(message, st, ci, hostinfo, hostinfo.remote, packet, nb, out)
-		if f.lightHouse != nil && mc%5000 == 0 {
-			f.lightHouse.Query(fwPacket.RemoteIP, f)
-		}
+		f.sendNoMetrics(message, 0, ci, hostinfo, hostinfo.remote, packet, nb, out, q)
 
-	} else if l.Level >= logrus.DebugLevel {
-		hostinfo.logger().
+	} else if f.l.Level >= logrus.DebugLevel {
+		hostinfo.logger(f.l).
 			WithField("fwPacket", fwPacket).
 			WithField("reason", dropReason).
 			Debugln("dropping outbound packet")
@@ -84,16 +81,25 @@ func (f *Interface) getOrHandshake(vpnIp uint32) *HostInfo {
 			hostinfo = f.handshakeManager.AddVpnIP(vpnIp)
 		}
 	}
-
 	ci := hostinfo.ConnectionState
 
 	if ci != nil && ci.eKey != nil && ci.ready {
 		return hostinfo
 	}
 
+	// Handshake is not ready, we need to grab the lock now before we start the handshake process
+	hostinfo.Lock()
+	defer hostinfo.Unlock()
+
+	// Double check, now that we have the lock
+	ci = hostinfo.ConnectionState
+	if ci != nil && ci.eKey != nil && ci.ready {
+		return hostinfo
+	}
+
 	if ci == nil {
 		// if we don't have a connection state, then send a handshake initiation
-		ci = f.newConnectionState(true, noise.HandshakeIX, []byte{}, 0)
+		ci = f.newConnectionState(f.l, true, noise.HandshakeIX, []byte{}, 0)
 		// FIXME: Maybe make XX selectable, but probably not since psk makes it nearly pointless for us.
 		//ci = f.newConnectionState(true, noise.HandshakeXX, []byte{}, 0)
 		hostinfo.ConnectionState = ci
@@ -124,33 +130,30 @@ func (f *Interface) sendMessageNow(t NebulaMessageType, st NebulaMessageSubType,
 	fp := &FirewallPacket{}
 	err := newPacket(p, false, fp)
 	if err != nil {
-		l.Warnf("error while parsing outgoing packet for firewall check; %v", err)
+		f.l.Warnf("error while parsing outgoing packet for firewall check; %v", err)
 		return
 	}
 
 	// check if packet is in outbound fw rules
-	dropReason := f.firewall.Drop(p, *fp, false, hostInfo, trustedCAs)
+	dropReason := f.firewall.Drop(p, *fp, false, hostInfo, f.caPool, nil)
 	if dropReason != nil {
-		if l.Level >= logrus.DebugLevel {
-			l.WithField("fwPacket", fp).
+		if f.l.Level >= logrus.DebugLevel {
+			f.l.WithField("fwPacket", fp).
 				WithField("reason", dropReason).
 				Debugln("dropping cached packet")
 		}
 		return
 	}
 
-	f.sendNoMetrics(message, st, hostInfo.ConnectionState, hostInfo, hostInfo.remote, p, nb, out)
-	if f.lightHouse != nil && *hostInfo.ConnectionState.messageCounter%5000 == 0 {
-		f.lightHouse.Query(fp.RemoteIP, f)
-	}
+	f.sendNoMetrics(message, st, hostInfo.ConnectionState, hostInfo, hostInfo.remote, p, nb, out, 0)
 }
 
 // SendMessageToVpnIp handles real ip:port lookup and sends to the current best known address for vpnIp
 func (f *Interface) SendMessageToVpnIp(t NebulaMessageType, st NebulaMessageSubType, vpnIp uint32, p, nb, out []byte) {
 	hostInfo := f.getOrHandshake(vpnIp)
 	if hostInfo == nil {
-		if l.Level >= logrus.DebugLevel {
-			l.WithField("vpnIp", IntIp(vpnIp)).
+		if f.l.Level >= logrus.DebugLevel {
+			f.l.WithField("vpnIp", IntIp(vpnIp)).
 				Debugln("dropping SendMessageToVpnIp, vpnIp not in our CIDR or in unsafe routes")
 		}
 		return
@@ -161,7 +164,7 @@ func (f *Interface) SendMessageToVpnIp(t NebulaMessageType, st NebulaMessageSubT
 		// the packet queue.
 		hostInfo.ConnectionState.queueLock.Lock()
 		if !hostInfo.ConnectionState.ready {
-			hostInfo.cachePacket(t, st, p, f.sendMessageToVpnIp)
+			hostInfo.cachePacket(f.l, t, st, p, f.sendMessageToVpnIp, f.cachedPacketMetrics)
 			hostInfo.ConnectionState.queueLock.Unlock()
 			return
 		}
@@ -176,76 +179,55 @@ func (f *Interface) sendMessageToVpnIp(t NebulaMessageType, st NebulaMessageSubT
 	f.send(t, st, hostInfo.ConnectionState, hostInfo, hostInfo.remote, p, nb, out)
 }
 
-// SendMessageToAll handles real ip:port lookup and sends to all known addresses for vpnIp
-func (f *Interface) SendMessageToAll(t NebulaMessageType, st NebulaMessageSubType, vpnIp uint32, p, nb, out []byte) {
-	hostInfo := f.getOrHandshake(vpnIp)
-	if hostInfo == nil {
-		if l.Level >= logrus.DebugLevel {
-			l.WithField("vpnIp", IntIp(vpnIp)).
-				Debugln("dropping SendMessageToAll, vpnIp not in our CIDR or in unsafe routes")
-		}
-		return
-	}
-
-	if hostInfo.ConnectionState.ready == false {
-		// Because we might be sending stored packets, lock here to stop new things going to
-		// the packet queue.
-		hostInfo.ConnectionState.queueLock.Lock()
-		if !hostInfo.ConnectionState.ready {
-			hostInfo.cachePacket(t, st, p, f.sendMessageToAll)
-			hostInfo.ConnectionState.queueLock.Unlock()
-			return
-		}
-		hostInfo.ConnectionState.queueLock.Unlock()
-	}
-
-	f.sendMessageToAll(t, st, hostInfo, p, nb, out)
-	return
-}
-
-func (f *Interface) sendMessageToAll(t NebulaMessageType, st NebulaMessageSubType, hostInfo *HostInfo, p, nb, b []byte) {
-	for _, r := range hostInfo.RemoteUDPAddrs() {
-		f.send(t, st, hostInfo.ConnectionState, hostInfo, r, p, nb, b)
-	}
-}
-
 func (f *Interface) send(t NebulaMessageType, st NebulaMessageSubType, ci *ConnectionState, hostinfo *HostInfo, remote *udpAddr, p, nb, out []byte) {
 	f.messageMetrics.Tx(t, st, 1)
-	f.sendNoMetrics(t, st, ci, hostinfo, remote, p, nb, out)
+	f.sendNoMetrics(t, st, ci, hostinfo, remote, p, nb, out, 0)
 }
 
-func (f *Interface) sendNoMetrics(t NebulaMessageType, st NebulaMessageSubType, ci *ConnectionState, hostinfo *HostInfo, remote *udpAddr, p, nb, out []byte) uint64 {
+func (f *Interface) sendNoMetrics(t NebulaMessageType, st NebulaMessageSubType, ci *ConnectionState, hostinfo *HostInfo, remote *udpAddr, p, nb, out []byte, q int) {
 	if ci.eKey == nil {
 		//TODO: log warning
-		return 0
+		return
 	}
 
 	var err error
 	//TODO: enable if we do more than 1 tun queue
 	//ci.writeLock.Lock()
-	c := atomic.AddUint64(ci.messageCounter, 1)
+	c := atomic.AddUint64(&ci.atomicMessageCounter, 1)
 
 	//l.WithField("trace", string(debug.Stack())).Error("out Header ", &Header{Version, t, st, 0, hostinfo.remoteIndexId, c}, p)
 	out = HeaderEncode(out, Version, uint8(t), uint8(st), hostinfo.remoteIndexId, c)
 	f.connectionManager.Out(hostinfo.hostId)
 
+	// Query our LH if we haven't since the last time we've been rebound, this will cause the remote to punch against
+	// all our IPs and enable a faster roaming.
+	if t != closeTunnel && hostinfo.lastRebindCount != f.rebindCount {
+		//NOTE: there is an update hole if a tunnel isn't used and exactly 256 rebinds occur before the tunnel is
+		// finally used again. This tunnel would eventually be torn down and recreated if this action didn't help.
+		f.lightHouse.QueryServer(hostinfo.hostId, f)
+		hostinfo.lastRebindCount = f.rebindCount
+		if f.l.Level >= logrus.DebugLevel {
+			f.l.WithField("vpnIp", hostinfo.hostId).Debug("Lighthouse update triggered for punch due to rebind counter")
+		}
+	}
+
 	out, err = ci.eKey.EncryptDanger(out, out, p, c, nb)
 	//TODO: see above note on lock
 	//ci.writeLock.Unlock()
 	if err != nil {
-		hostinfo.logger().WithError(err).
+		hostinfo.logger(f.l).WithError(err).
 			WithField("udpAddr", remote).WithField("counter", c).
-			WithField("attemptedCounter", ci.messageCounter).
+			WithField("attemptedCounter", c).
 			Error("Failed to encrypt outgoing packet")
-		return c
+		return
 	}
 
-	err = f.outside.WriteTo(out, remote)
+	err = f.writers[q].WriteTo(out, remote)
 	if err != nil {
-		hostinfo.logger().WithError(err).
+		hostinfo.logger(f.l).WithError(err).
 			WithField("udpAddr", remote).Error("Failed to write outgoing packet")
 	}
-	return c
+	return
 }
 
 func isMulticast(ip uint32) bool {

interface.go

@@ -5,9 +5,12 @@ import (
 	"io"
 	"net"
 	"os"
+	"runtime"
 	"time"
 
 	"github.com/rcrowley/go-metrics"
+	"github.com/sirupsen/logrus"
+	"github.com/slackhq/nebula/cert"
 )
 
 const mtu = 9001
@@ -18,10 +21,9 @@ type Inside interface {
 	CidrNet() *net.IPNet
 	DeviceName() string
 	WriteRaw([]byte) error
+	NewMultiQueueReader() (io.ReadWriteCloser, error)
 }
 
-type InsideHandler func(hostInfo *HostInfo, ci *ConnectionState, addr *udpAddr, header *Header, out []byte, packet []byte, fp *FirewallPacket, nb []byte)
-
 type InterfaceConfig struct {
 	HostMap                 *HostMap
 	Outside                 *udpConn
@@ -37,10 +39,13 @@ type InterfaceConfig struct {
 	DropLocalBroadcast      bool
 	DropMulticast           bool
 	UDPBatchSize            int
-	udpQueues               int
-	tunQueues               int
+	routines                int
 	MessageMetrics          *MessageMetrics
 	version                 string
+	caPool                  *cert.NebulaCAPool
+
+	ConntrackCacheTimeout time.Duration
+	l                     *logrus.Logger
 }
 
 type Interface struct {
@@ -56,18 +61,27 @@ type Interface struct {
 	createTime         time.Time
 	lightHouse         *LightHouse
 	localBroadcast     uint32
+	myVpnIp            uint32
 	dropLocalBroadcast bool
 	dropMulticast      bool
 	udpBatchSize       int
-	udpQueues          int
-	tunQueues          int
-	version            string
+	routines           int
+	caPool             *cert.NebulaCAPool
 
-	// handlers are mapped by protocol version -> type -> subtype
-	handlers map[uint8]map[NebulaMessageType]map[NebulaMessageSubType]InsideHandler
+	// rebindCount is used to decide if an active tunnel should trigger a punch notification through a lighthouse
+	rebindCount int8
+	version     string
 
-	metricHandshakes metrics.Histogram
-	messageMetrics   *MessageMetrics
+	conntrackCacheTimeout time.Duration
+
+	writers []*udpConn
+	readers []io.ReadWriteCloser
+
+	metricHandshakes    metrics.Histogram
+	messageMetrics      *MessageMetrics
+	cachedPacketMetrics *cachedPacketMetrics
+
+	l *logrus.Logger
 }
 
 func NewInterface(c *InterfaceConfig) (*Interface, error) {
@@ -99,104 +113,108 @@ func NewInterface(c *InterfaceConfig) (*Interface, error) {
 		dropLocalBroadcast: c.DropLocalBroadcast,
 		dropMulticast:      c.DropMulticast,
 		udpBatchSize:       c.UDPBatchSize,
-		udpQueues:          c.udpQueues,
-		tunQueues:          c.tunQueues,
+		routines:           c.routines,
 		version:            c.version,
+		writers:            make([]*udpConn, c.routines),
+		readers:            make([]io.ReadWriteCloser, c.routines),
+		caPool:             c.caPool,
+		myVpnIp:            ip2int(c.certState.certificate.Details.Ips[0].IP),
+
+		conntrackCacheTimeout: c.ConntrackCacheTimeout,
 
 		metricHandshakes: metrics.GetOrRegisterHistogram("handshakes", nil, metrics.NewExpDecaySample(1028, 0.015)),
 		messageMetrics:   c.MessageMetrics,
+		cachedPacketMetrics: &cachedPacketMetrics{
+			sent:    metrics.GetOrRegisterCounter("hostinfo.cached_packets.sent", nil),
+			dropped: metrics.GetOrRegisterCounter("hostinfo.cached_packets.dropped", nil),
+		},
+
+		l: c.l,
 	}
 
-	ifce.connectionManager = newConnectionManager(ifce, c.checkInterval, c.pendingDeletionInterval)
-	ifce.handlers = map[uint8]map[NebulaMessageType]map[NebulaMessageSubType]InsideHandler{
-		Version: {
-			handshake: {
-				handshakeIXPSK0: ifce.rxMetrics(ifce.handleHandshakePacket),
-			},
-			message: {
-				subTypeNone: ifce.encrypted(ifce.handleMessagePacket),
-			},
-			recvError: {
-				subTypeNone: ifce.rxMetrics(ifce.handleRecvErrorPacket),
-			},
-			lightHouse: {
-				subTypeNone: ifce.rxMetrics(ifce.encrypted(ifce.handleLighthousePacket)),
-			},
-			test: {
-				testRequest: ifce.rxMetrics(ifce.encrypted(ifce.handleTestPacket)),
-				testReply:   ifce.rxMetrics(ifce.encrypted(ifce.handleTestPacket)),
-			},
-			closeTunnel: {
-				subTypeNone: ifce.rxMetrics(ifce.encrypted(ifce.handleCloseTunnelPacket)),
-			},
-		},
-	}
+	ifce.connectionManager = newConnectionManager(c.l, ifce, c.checkInterval, c.pendingDeletionInterval)
 
 	return ifce, nil
 }
 
-func (f *Interface) run() {
+// activate creates the interface on the host. After the interface is created, any
+// other services that want to bind listeners to its IP may do so successfully. However,
+// the interface isn't going to process anything until run() is called.
+func (f *Interface) activate() {
 	// actually turn on tun dev
-	if err := f.inside.Activate(); err != nil {
-		l.Fatal(err)
-	}
 
 	addr, err := f.outside.LocalAddr()
 	if err != nil {
-		l.WithError(err).Error("Failed to get udp listen address")
+		f.l.WithError(err).Error("Failed to get udp listen address")
 	}
 
-	l.WithField("interface", f.inside.DeviceName()).WithField("network", f.inside.CidrNet().String()).
+	f.l.WithField("interface", f.inside.DeviceName()).WithField("network", f.inside.CidrNet().String()).
 		WithField("build", f.version).WithField("udpAddr", addr).
 		Info("Nebula interface is active")
 
+	metrics.GetOrRegisterGauge("routines", nil).Update(int64(f.routines))
+
+	// Prepare n tun queues
+	var reader io.ReadWriteCloser = f.inside
+	for i := 0; i < f.routines; i++ {
+		if i > 0 {
+			reader, err = f.inside.NewMultiQueueReader()
+			if err != nil {
+				f.l.Fatal(err)
+			}
+		}
+		f.readers[i] = reader
+	}
+
+	if err := f.inside.Activate(); err != nil {
+		f.l.Fatal(err)
+	}
+}
+
+func (f *Interface) run() {
 	// Launch n queues to read packets from udp
-	for i := 0; i < f.udpQueues; i++ {
+	for i := 0; i < f.routines; i++ {
 		go f.listenOut(i)
 	}
 
 	// Launch n queues to read packets from tun dev
-	for i := 0; i < f.tunQueues; i++ {
-		go f.listenIn(i)
+	for i := 0; i < f.routines; i++ {
+		go f.listenIn(f.readers[i], i)
 	}
 }
 
 func (f *Interface) listenOut(i int) {
-	//TODO: handle error
-	addr, err := f.outside.LocalAddr()
-	if err != nil {
-		l.WithError(err).Error("failed to discover udp listening address")
-	}
+	runtime.LockOSThread()
 
 	var li *udpConn
+	// TODO clean this up with a coherent interface for each outside connection
 	if i > 0 {
-		//TODO: handle error
-		li, err = NewListener(udp2ip(addr).String(), int(addr.Port), i > 0)
-		if err != nil {
-			l.WithError(err).Error("failed to make a new udp listener")
-		}
+		li = f.writers[i]
 	} else {
 		li = f.outside
 	}
-
-	li.ListenOut(f)
+	li.ListenOut(f, i)
 }
 
-func (f *Interface) listenIn(i int) {
+func (f *Interface) listenIn(reader io.ReadWriteCloser, i int) {
+	runtime.LockOSThread()
+
 	packet := make([]byte, mtu)
 	out := make([]byte, mtu)
 	fwPacket := &FirewallPacket{}
 	nb := make([]byte, 12, 12)
 
+	conntrackCache := NewConntrackCacheTicker(f.conntrackCacheTimeout)
+
 	for {
-		n, err := f.inside.Read(packet)
+		n, err := reader.Read(packet)
 		if err != nil {
-			l.WithError(err).Error("Error while reading outbound packet")
+			f.l.WithError(err).Error("Error while reading outbound packet")
 			// This only seems to happen when something fatal happens to the fd, so exit.
 			os.Exit(2)
 		}
 
-		f.consumeInsidePacket(subTypeNone, packet[:n], fwPacket, nb, out)
+		f.consumeInsidePacket(packet[:n], fwPacket, nb, out, i, conntrackCache.Get(f.l))
 	}
 }
 
@@ -204,27 +222,29 @@ func (f *Interface) RegisterConfigChangeCallbacks(c *Config) {
 	c.RegisterReloadCallback(f.reloadCA)
 	c.RegisterReloadCallback(f.reloadCertKey)
 	c.RegisterReloadCallback(f.reloadFirewall)
-	c.RegisterReloadCallback(f.outside.reloadConfig)
+	for _, udpConn := range f.writers {
+		c.RegisterReloadCallback(udpConn.reloadConfig)
+	}
 }
 
 func (f *Interface) reloadCA(c *Config) {
 	// reload and check regardless
 	// todo: need mutex?
-	newCAs, err := loadCAFromConfig(c)
+	newCAs, err := loadCAFromConfig(f.l, c)
 	if err != nil {
-		l.WithError(err).Error("Could not refresh trusted CA certificates")
+		f.l.WithError(err).Error("Could not refresh trusted CA certificates")
 		return
 	}
 
-	trustedCAs = newCAs
-	l.WithField("fingerprints", trustedCAs.GetFingerprints()).Info("Trusted CA certificates refreshed")
+	f.caPool = newCAs
+	f.l.WithField("fingerprints", f.caPool.GetFingerprints()).Info("Trusted CA certificates refreshed")
 }
 
 func (f *Interface) reloadCertKey(c *Config) {
 	// reload and check in all cases
 	cs, err := NewCertStateFromConfig(c)
 	if err != nil {
-		l.WithError(err).Error("Could not refresh client cert")
+		f.l.WithError(err).Error("Could not refresh client cert")
 		return
 	}
 
@@ -232,24 +252,24 @@ func (f *Interface) reloadCertKey(c *Config) {
 	oldIPs := f.certState.certificate.Details.Ips
 	newIPs := cs.certificate.Details.Ips
 	if len(oldIPs) > 0 && len(newIPs) > 0 && oldIPs[0].String() != newIPs[0].String() {
-		l.WithField("new_ip", newIPs[0]).WithField("old_ip", oldIPs[0]).Error("IP in new cert was different from old")
+		f.l.WithField("new_ip", newIPs[0]).WithField("old_ip", oldIPs[0]).Error("IP in new cert was different from old")
 		return
 	}
 
 	f.certState = cs
-	l.WithField("cert", cs.certificate).Info("Client cert refreshed from disk")
+	f.l.WithField("cert", cs.certificate).Info("Client cert refreshed from disk")
 }
 
 func (f *Interface) reloadFirewall(c *Config) {
 	//TODO: need to trigger/detect if the certificate changed too
 	if c.HasChanged("firewall") == false {
-		l.Debug("No firewall config change detected")
+		f.l.Debug("No firewall config change detected")
 		return
 	}
 
-	fw, err := NewFirewallFromConfig(f.certState.certificate, c)
+	fw, err := NewFirewallFromConfig(f.l, f.certState.certificate, c)
 	if err != nil {
-		l.WithError(err).Error("Error while creating firewall during reload")
+		f.l.WithError(err).Error("Error while creating firewall during reload")
 		return
 	}
 
@@ -262,7 +282,7 @@ func (f *Interface) reloadFirewall(c *Config) {
 	// If rulesVersion is back to zero, we have wrapped all the way around. Be
 	// safe and just reset conntrack in this case.
 	if fw.rulesVersion == 0 {
-		l.WithField("firewallHash", fw.GetRuleHash()).
+		f.l.WithField("firewallHash", fw.GetRuleHash()).
 			WithField("oldFirewallHash", oldFw.GetRuleHash()).
 			WithField("rulesVersion", fw.rulesVersion).
 			Warn("firewall rulesVersion has overflowed, resetting conntrack")
@@ -273,7 +293,7 @@ func (f *Interface) reloadFirewall(c *Config) {
 	f.firewall = fw
 
 	oldFw.Destroy()
-	l.WithField("firewallHash", fw.GetRuleHash()).
+	f.l.WithField("firewallHash", fw.GetRuleHash()).
 		WithField("oldFirewallHash", oldFw.GetRuleHash()).
 		WithField("rulesVersion", fw.rulesVersion).
 		Info("New firewall has been installed")
@@ -281,8 +301,13 @@ func (f *Interface) reloadFirewall(c *Config) {
 
 func (f *Interface) emitStats(i time.Duration) {
 	ticker := time.NewTicker(i)
+
+	udpStats := NewUDPStatsEmitter(f.writers)
+
 	for range ticker.C {
 		f.firewall.EmitStats()
 		f.handshakeManager.EmitStats()
+
+		udpStats()
 	}
 }

lighthouse.go

@@ -1,6 +1,8 @@
 package nebula
 
 import (
+	"encoding/binary"
+	"errors"
 	"fmt"
 	"net"
 	"sync"
@@ -8,17 +10,25 @@ import (
 
 	"github.com/golang/protobuf/proto"
 	"github.com/rcrowley/go-metrics"
-	"github.com/slackhq/nebula/cert"
+	"github.com/sirupsen/logrus"
 )
 
+//TODO: if a lighthouse doesn't have an answer, clients AGGRESSIVELY REQUERY.. why? handshake manager and/or getOrHandshake?
+//TODO: nodes are roaming lighthouses, this is bad. How are they learning?
+
+var ErrHostNotKnown = errors.New("host not known")
+
 type LightHouse struct {
+	//TODO: We need a timer wheel to kick out vpnIps that haven't reported in a long time
 	sync.RWMutex //Because we concurrently read and write to our maps
 	amLighthouse bool
-	myIp         uint32
+	myVpnIp      uint32
+	myVpnZeros   uint32
 	punchConn    *udpConn
 
 	// Local cache of answers from light houses
-	addrMap map[uint32][]udpAddr
+	// map of vpn Ip to answers
+	addrMap map[uint32]*RemoteList
 
 	// filters remote addresses allowed for each host
 	// - When we are a lighthouse, this filters what addresses we store and
@@ -38,24 +48,26 @@ type LightHouse struct {
 	staticList  map[uint32]struct{}
 	lighthouses map[uint32]struct{}
 	interval    int
-	nebulaPort  int
+	nebulaPort  uint32 // 32 bits because protobuf does not have a uint16
 	punchBack   bool
 	punchDelay  time.Duration
 
 	metrics           *MessageMetrics
 	metricHolepunchTx metrics.Counter
+	l                 *logrus.Logger
 }
 
 type EncWriter interface {
 	SendMessageToVpnIp(t NebulaMessageType, st NebulaMessageSubType, vpnIp uint32, p, nb, out []byte)
-	SendMessageToAll(t NebulaMessageType, st NebulaMessageSubType, vpnIp uint32, p, nb, out []byte)
 }
 
-func NewLightHouse(amLighthouse bool, myIp uint32, ips []uint32, interval int, nebulaPort int, pc *udpConn, punchBack bool, punchDelay time.Duration, metricsEnabled bool) *LightHouse {
+func NewLightHouse(l *logrus.Logger, amLighthouse bool, myVpnIpNet *net.IPNet, ips []uint32, interval int, nebulaPort uint32, pc *udpConn, punchBack bool, punchDelay time.Duration, metricsEnabled bool) *LightHouse {
+	ones, _ := myVpnIpNet.Mask.Size()
 	h := LightHouse{
 		amLighthouse: amLighthouse,
-		myIp:         myIp,
-		addrMap:      make(map[uint32][]udpAddr),
+		myVpnIp:      ip2int(myVpnIpNet.IP),
+		myVpnZeros:   uint32(32 - ones),
+		addrMap:      make(map[uint32]*RemoteList),
 		nebulaPort:   nebulaPort,
 		lighthouses:  make(map[uint32]struct{}),
 		staticList:   make(map[uint32]struct{}),
@@ -63,6 +75,7 @@ func NewLightHouse(amLighthouse bool, myIp uint32, ips []uint32, interval int, n
 		punchConn:    pc,
 		punchBack:    punchBack,
 		punchDelay:   punchDelay,
+		l:            l,
 	}
 
 	if metricsEnabled {
@@ -103,40 +116,10 @@ func (lh *LightHouse) ValidateLHStaticEntries() error {
 	return nil
 }
 
-func (lh *LightHouse) Query(ip uint32, f EncWriter) ([]udpAddr, error) {
+func (lh *LightHouse) Query(ip uint32, f EncWriter) *RemoteList {
 	if !lh.IsLighthouseIP(ip) {
 		lh.QueryServer(ip, f)
 	}
-	lh.RLock()
-	if v, ok := lh.addrMap[ip]; ok {
-		lh.RUnlock()
-		return v, nil
-	}
-	lh.RUnlock()
-	return nil, fmt.Errorf("host %s not known, queries sent to lighthouses", IntIp(ip))
-}
-
-// This is asynchronous so no reply should be expected
-func (lh *LightHouse) QueryServer(ip uint32, f EncWriter) {
-	if !lh.amLighthouse {
-		// Send a query to the lighthouses and hope for the best next time
-		query, err := proto.Marshal(NewLhQueryByInt(ip))
-		if err != nil {
-			l.WithError(err).WithField("vpnIp", IntIp(ip)).Error("Failed to marshal lighthouse query payload")
-			return
-		}
-
-		lh.metricTx(NebulaMeta_HostQuery, int64(len(lh.lighthouses)))
-		nb := make([]byte, 12, 12)
-		out := make([]byte, mtu)
-		for n := range lh.lighthouses {
-			f.SendMessageToVpnIp(lightHouse, 0, n, query, nb, out)
-		}
-	}
-}
-
-// Query our local lighthouse cached results
-func (lh *LightHouse) QueryCache(ip uint32) []udpAddr {
 	lh.RLock()
 	if v, ok := lh.addrMap[ip]; ok {
 		lh.RUnlock()
@@ -146,6 +129,71 @@ func (lh *LightHouse) QueryCache(ip uint32) []udpAddr {
 	return nil
 }
 
+// This is asynchronous so no reply should be expected
+func (lh *LightHouse) QueryServer(ip uint32, f EncWriter) {
+	if lh.amLighthouse {
+		return
+	}
+
+	if lh.IsLighthouseIP(ip) {
+		return
+	}
+
+	// Send a query to the lighthouses and hope for the best next time
+	query, err := proto.Marshal(NewLhQueryByInt(ip))
+	if err != nil {
+		lh.l.WithError(err).WithField("vpnIp", IntIp(ip)).Error("Failed to marshal lighthouse query payload")
+		return
+	}
+
+	lh.metricTx(NebulaMeta_HostQuery, int64(len(lh.lighthouses)))
+	nb := make([]byte, 12, 12)
+	out := make([]byte, mtu)
+	for n := range lh.lighthouses {
+		f.SendMessageToVpnIp(lightHouse, 0, n, query, nb, out)
+	}
+}
+
+func (lh *LightHouse) QueryCache(ip uint32) *RemoteList {
+	lh.RLock()
+	if v, ok := lh.addrMap[ip]; ok {
+		lh.RUnlock()
+		return v
+	}
+	lh.RUnlock()
+
+	lh.Lock()
+	defer lh.Unlock()
+	// Add an entry if we don't already have one
+	return lh.unlockedGetRemoteList(ip)
+}
+
+// queryAndPrepMessage is a lock helper on RemoteList, assisting the caller to build a lighthouse message containing
+// details from the remote list. It looks for a hit in the addrMap and a hit in the RemoteList under the owner vpnIp
+// If one is found then f() is called with proper locking, f() must return result of n.MarshalTo()
+func (lh *LightHouse) queryAndPrepMessage(vpnIp uint32, f func(*cache) (int, error)) (bool, int, error) {
+	lh.RLock()
+	// Do we have an entry in the main cache?
+	if v, ok := lh.addrMap[vpnIp]; ok {
+		// Swap lh lock for remote list lock
+		v.RLock()
+		defer v.RUnlock()
+
+		lh.RUnlock()
+
+		// vpnIp should also be the owner here since we are a lighthouse.
+		c := v.cache[vpnIp]
+		// Make sure we have
+		if c != nil {
+			n, err := f(c)
+			return true, n, err
+		}
+		return false, 0, nil
+	}
+	lh.RUnlock()
+	return false, 0, nil
+}
+
 func (lh *LightHouse) DeleteVpnIP(vpnIP uint32) {
 	// First we check the static mapping
 	// and do nothing if it is there
@@ -155,47 +203,87 @@ func (lh *LightHouse) DeleteVpnIP(vpnIP uint32) {
 	lh.Lock()
 	//l.Debugln(lh.addrMap)
 	delete(lh.addrMap, vpnIP)
-	l.Debugf("deleting %s from lighthouse.", IntIp(vpnIP))
+
+	if lh.l.Level >= logrus.DebugLevel {
+		lh.l.Debugf("deleting %s from lighthouse.", IntIp(vpnIP))
+	}
+
 	lh.Unlock()
 }
 
-func (lh *LightHouse) AddRemote(vpnIP uint32, toIp *udpAddr, static bool) {
-	// First we check if the sender thinks this is a static entry
-	// and do nothing if it is not, but should be considered static
-	if static == false {
-		if _, ok := lh.staticList[vpnIP]; ok {
-			return
-		}
-	}
-
+// AddStaticRemote adds a static host entry for vpnIp as ourselves as the owner
+// We are the owner because we don't want a lighthouse server to advertise for static hosts it was configured with
+// And we don't want a lighthouse query reply to interfere with our learned cache if we are a client
+func (lh *LightHouse) AddStaticRemote(vpnIp uint32, toAddr *udpAddr) {
 	lh.Lock()
-	for _, v := range lh.addrMap[vpnIP] {
-		if v.Equals(toIp) {
-			lh.Unlock()
+	am := lh.unlockedGetRemoteList(vpnIp)
+	am.Lock()
+	defer am.Unlock()
+	lh.Unlock()
+
+	if ipv4 := toAddr.IP.To4(); ipv4 != nil {
+		to := NewIp4AndPort(ipv4, uint32(toAddr.Port))
+		if !lh.unlockedShouldAddV4(to) {
 			return
 		}
+		am.unlockedPrependV4(lh.myVpnIp, to)
+
+	} else {
+		to := NewIp6AndPort(toAddr.IP, uint32(toAddr.Port))
+		if !lh.unlockedShouldAddV6(to) {
+			return
+		}
+		am.unlockedPrependV6(lh.myVpnIp, to)
 	}
 
-	allow := lh.remoteAllowList.Allow(udp2ipInt(toIp))
-	l.WithField("remoteIp", toIp).WithField("allow", allow).Debug("remoteAllowList.Allow")
-	if !allow {
-		return
-	}
-
-	//l.Debugf("Adding reply of %s as %s\n", IntIp(vpnIP), toIp)
-	if static {
-		lh.staticList[vpnIP] = struct{}{}
-	}
-	lh.addrMap[vpnIP] = append(lh.addrMap[vpnIP], *toIp)
-	lh.Unlock()
+	// Mark it as static
+	lh.staticList[vpnIp] = struct{}{}
 }
 
-func (lh *LightHouse) AddRemoteAndReset(vpnIP uint32, toIp *udpAddr) {
-	if lh.amLighthouse {
-		lh.DeleteVpnIP(vpnIP)
-		lh.AddRemote(vpnIP, toIp, false)
+// unlockedGetRemoteList assumes you have the lh lock
+func (lh *LightHouse) unlockedGetRemoteList(vpnIP uint32) *RemoteList {
+	am, ok := lh.addrMap[vpnIP]
+	if !ok {
+		am = NewRemoteList()
+		lh.addrMap[vpnIP] = am
+	}
+	return am
+}
+
+// unlockedShouldAddV4 checks if to is allowed by our allow list
+func (lh *LightHouse) unlockedShouldAddV4(to *Ip4AndPort) bool {
+	allow := lh.remoteAllowList.AllowIpV4(to.Ip)
+	if lh.l.Level >= logrus.TraceLevel {
+		lh.l.WithField("remoteIp", IntIp(to.Ip)).WithField("allow", allow).Trace("remoteAllowList.Allow")
 	}
 
+	if !allow || ipMaskContains(lh.myVpnIp, lh.myVpnZeros, to.Ip) {
+		return false
+	}
+
+	return true
+}
+
+// unlockedShouldAddV6 checks if to is allowed by our allow list
+func (lh *LightHouse) unlockedShouldAddV6(to *Ip6AndPort) bool {
+	allow := lh.remoteAllowList.AllowIpV6(to.Hi, to.Lo)
+	if lh.l.Level >= logrus.TraceLevel {
+		lh.l.WithField("remoteIp", lhIp6ToIp(to)).WithField("allow", allow).Trace("remoteAllowList.Allow")
+	}
+
+	// We don't check our vpn network here because nebula does not support ipv6 on the inside
+	if !allow {
+		return false
+	}
+
+	return true
+}
+
+func lhIp6ToIp(v *Ip6AndPort) net.IP {
+	ip := make(net.IP, 16)
+	binary.BigEndian.PutUint64(ip[:8], v.Hi)
+	binary.BigEndian.PutUint64(ip[8:], v.Lo)
+	return ip
 }
 
 func (lh *LightHouse) IsLighthouseIP(vpnIP uint32) bool {
@@ -205,12 +293,6 @@ func (lh *LightHouse) IsLighthouseIP(vpnIP uint32) bool {
 	return false
 }
 
-// Quick generators for protobuf
-
-func NewLhQueryByIpString(VpnIp string) *NebulaMeta {
-	return NewLhQueryByInt(ip2int(net.ParseIP(VpnIp)))
-}
-
 func NewLhQueryByInt(VpnIp uint32) *NebulaMeta {
 	return &NebulaMeta{
 		Type: NebulaMeta_HostQuery,
@@ -220,26 +302,30 @@ func NewLhQueryByInt(VpnIp uint32) *NebulaMeta {
 	}
 }
 
-func NewLhWhoami() *NebulaMeta {
-	return &NebulaMeta{
-		Type:    NebulaMeta_HostWhoami,
-		Details: &NebulaMetaDetails{},
+func NewIp4AndPort(ip net.IP, port uint32) *Ip4AndPort {
+	ipp := Ip4AndPort{Port: port}
+	ipp.Ip = ip2int(ip)
+	return &ipp
+}
+
+func NewIp6AndPort(ip net.IP, port uint32) *Ip6AndPort {
+	return &Ip6AndPort{
+		Hi:   binary.BigEndian.Uint64(ip[:8]),
+		Lo:   binary.BigEndian.Uint64(ip[8:]),
+		Port: port,
 	}
 }
 
-// End Quick generators for protobuf
-
-func NewIpAndPortFromUDPAddr(addr udpAddr) *IpAndPort {
-	return &IpAndPort{Ip: udp2ipInt(&addr), Port: uint32(addr.Port)}
+func NewUDPAddrFromLH4(ipp *Ip4AndPort) *udpAddr {
+	ip := ipp.Ip
+	return NewUDPAddr(
+		net.IPv4(byte(ip&0xff000000>>24), byte(ip&0x00ff0000>>16), byte(ip&0x0000ff00>>8), byte(ip&0x000000ff)),
+		uint16(ipp.Port),
+	)
 }
 
-func NewIpAndPortsFromNetIps(ips []udpAddr) *[]*IpAndPort {
-	var iap []*IpAndPort
-	for _, e := range ips {
-		// Only add IPs that aren't my VPN/tun IP
-		iap = append(iap, NewIpAndPortFromUDPAddr(e))
-	}
-	return &iap
+func NewUDPAddrFromLH6(ipp *Ip6AndPort) *udpAddr {
+	return NewUDPAddr(lhIp6ToIp(ipp), uint16(ipp.Port))
 }
 
 func (lh *LightHouse) LhUpdateWorker(f EncWriter) {
@@ -248,195 +334,308 @@ func (lh *LightHouse) LhUpdateWorker(f EncWriter) {
 	}
 
 	for {
-		ipp := []*IpAndPort{}
-
-		for _, e := range *localIps(lh.localAllowList) {
-			// Only add IPs that aren't my VPN/tun IP
-			if ip2int(e) != lh.myIp {
-				ipp = append(ipp, &IpAndPort{Ip: ip2int(e), Port: uint32(lh.nebulaPort)})
-				//fmt.Println(e)
-			}
-		}
-		m := &NebulaMeta{
-			Type: NebulaMeta_HostUpdateNotification,
-			Details: &NebulaMetaDetails{
-				VpnIp:      lh.myIp,
-				IpAndPorts: ipp,
-			},
-		}
-
-		lh.metricTx(NebulaMeta_HostUpdateNotification, int64(len(lh.lighthouses)))
-		nb := make([]byte, 12, 12)
-		out := make([]byte, mtu)
-		for vpnIp := range lh.lighthouses {
-			mm, err := proto.Marshal(m)
-			if err != nil {
-				l.Debugf("Invalid marshal to update")
-			}
-			//l.Error("LIGHTHOUSE PACKET SEND", mm)
-			f.SendMessageToVpnIp(lightHouse, 0, vpnIp, mm, nb, out)
-
-		}
+		lh.SendUpdate(f)
 		time.Sleep(time.Second * time.Duration(lh.interval))
 	}
 }
 
-func (lh *LightHouse) HandleRequest(rAddr *udpAddr, vpnIp uint32, p []byte, c *cert.NebulaCertificate, f EncWriter) {
-	n := &NebulaMeta{}
-	err := proto.Unmarshal(p, n)
+func (lh *LightHouse) SendUpdate(f EncWriter) {
+	var v4 []*Ip4AndPort
+	var v6 []*Ip6AndPort
+
+	for _, e := range *localIps(lh.l, lh.localAllowList) {
+		if ip4 := e.To4(); ip4 != nil && ipMaskContains(lh.myVpnIp, lh.myVpnZeros, ip2int(ip4)) {
+			continue
+		}
+
+		// Only add IPs that aren't my VPN/tun IP
+		if ip := e.To4(); ip != nil {
+			v4 = append(v4, NewIp4AndPort(e, lh.nebulaPort))
+		} else {
+			v6 = append(v6, NewIp6AndPort(e, lh.nebulaPort))
+		}
+	}
+	m := &NebulaMeta{
+		Type: NebulaMeta_HostUpdateNotification,
+		Details: &NebulaMetaDetails{
+			VpnIp:       lh.myVpnIp,
+			Ip4AndPorts: v4,
+			Ip6AndPorts: v6,
+		},
+	}
+
+	lh.metricTx(NebulaMeta_HostUpdateNotification, int64(len(lh.lighthouses)))
+	nb := make([]byte, 12, 12)
+	out := make([]byte, mtu)
+
+	mm, err := proto.Marshal(m)
 	if err != nil {
-		l.WithError(err).WithField("vpnIp", IntIp(vpnIp)).WithField("udpAddr", rAddr).
+		lh.l.WithError(err).Error("Error while marshaling for lighthouse update")
+		return
+	}
+
+	for vpnIp := range lh.lighthouses {
+		f.SendMessageToVpnIp(lightHouse, 0, vpnIp, mm, nb, out)
+	}
+}
+
+type LightHouseHandler struct {
+	lh   *LightHouse
+	nb   []byte
+	out  []byte
+	pb   []byte
+	meta *NebulaMeta
+	l    *logrus.Logger
+}
+
+func (lh *LightHouse) NewRequestHandler() *LightHouseHandler {
+	lhh := &LightHouseHandler{
+		lh:  lh,
+		nb:  make([]byte, 12, 12),
+		out: make([]byte, mtu),
+		l:   lh.l,
+		pb:  make([]byte, mtu),
+
+		meta: &NebulaMeta{
+			Details: &NebulaMetaDetails{},
+		},
+	}
+
+	return lhh
+}
+
+func (lh *LightHouse) metricRx(t NebulaMeta_MessageType, i int64) {
+	lh.metrics.Rx(NebulaMessageType(t), 0, i)
+}
+
+func (lh *LightHouse) metricTx(t NebulaMeta_MessageType, i int64) {
+	lh.metrics.Tx(NebulaMessageType(t), 0, i)
+}
+
+// This method is similar to Reset(), but it re-uses the pointer structs
+// so that we don't have to re-allocate them
+func (lhh *LightHouseHandler) resetMeta() *NebulaMeta {
+	details := lhh.meta.Details
+	lhh.meta.Reset()
+
+	// Keep the array memory around
+	details.Ip4AndPorts = details.Ip4AndPorts[:0]
+	details.Ip6AndPorts = details.Ip6AndPorts[:0]
+	lhh.meta.Details = details
+
+	return lhh.meta
+}
+
+func (lhh *LightHouseHandler) HandleRequest(rAddr *udpAddr, vpnIp uint32, p []byte, w EncWriter) {
+	n := lhh.resetMeta()
+	err := n.Unmarshal(p)
+	if err != nil {
+		lhh.l.WithError(err).WithField("vpnIp", IntIp(vpnIp)).WithField("udpAddr", rAddr).
 			Error("Failed to unmarshal lighthouse packet")
 		//TODO: send recv_error?
 		return
 	}
 
 	if n.Details == nil {
-		l.WithField("vpnIp", IntIp(vpnIp)).WithField("udpAddr", rAddr).
+		lhh.l.WithField("vpnIp", IntIp(vpnIp)).WithField("udpAddr", rAddr).
 			Error("Invalid lighthouse update")
 		//TODO: send recv_error?
 		return
 	}
 
-	lh.metricRx(n.Type, 1)
+	lhh.lh.metricRx(n.Type, 1)
 
 	switch n.Type {
 	case NebulaMeta_HostQuery:
-		// Exit if we don't answer queries
-		if !lh.amLighthouse {
-			l.Debugln("I don't answer queries, but received from: ", rAddr)
-			return
-		}
-
-		//l.Debugln("Got Query")
-		ips, err := lh.Query(n.Details.VpnIp, f)
-		if err != nil {
-			//l.Debugf("Can't answer query %s from %s because error: %s", IntIp(n.Details.VpnIp), rAddr, err)
-			return
-		} else {
-			iap := NewIpAndPortsFromNetIps(ips)
-			answer := &NebulaMeta{
-				Type: NebulaMeta_HostQueryReply,
-				Details: &NebulaMetaDetails{
-					VpnIp:      n.Details.VpnIp,
-					IpAndPorts: *iap,
-				},
-			}
-			reply, err := proto.Marshal(answer)
-			if err != nil {
-				l.WithError(err).WithField("vpnIp", IntIp(vpnIp)).Error("Failed to marshal lighthouse host query reply")
-				return
-			}
-			lh.metricTx(NebulaMeta_HostQueryReply, 1)
-			f.SendMessageToVpnIp(lightHouse, 0, vpnIp, reply, make([]byte, 12, 12), make([]byte, mtu))
-
-			// This signals the other side to punch some zero byte udp packets
-			ips, err = lh.Query(vpnIp, f)
-			if err != nil {
-				l.WithField("vpnIp", IntIp(vpnIp)).Debugln("Can't notify host to punch")
-				return
-			} else {
-				//l.Debugln("Notify host to punch", iap)
-				iap = NewIpAndPortsFromNetIps(ips)
-				answer = &NebulaMeta{
-					Type: NebulaMeta_HostPunchNotification,
-					Details: &NebulaMetaDetails{
-						VpnIp:      vpnIp,
-						IpAndPorts: *iap,
-					},
-				}
-				reply, _ := proto.Marshal(answer)
-				lh.metricTx(NebulaMeta_HostPunchNotification, 1)
-				f.SendMessageToVpnIp(lightHouse, 0, n.Details.VpnIp, reply, make([]byte, 12, 12), make([]byte, mtu))
-			}
-			//fmt.Println(reply, remoteaddr)
-		}
+		lhh.handleHostQuery(n, vpnIp, rAddr, w)
 
 	case NebulaMeta_HostQueryReply:
-		if !lh.IsLighthouseIP(vpnIp) {
-			return
-		}
-		for _, a := range n.Details.IpAndPorts {
-			//first := n.Details.IpAndPorts[0]
-			ans := NewUDPAddr(a.Ip, uint16(a.Port))
-			lh.AddRemote(n.Details.VpnIp, ans, false)
-		}
-		// Non-blocking attempt to trigger, skip if it would block
-		select {
-		case lh.handshakeTrigger <- n.Details.VpnIp:
-		default:
-		}
+		lhh.handleHostQueryReply(n, vpnIp)
 
 	case NebulaMeta_HostUpdateNotification:
-		//Simple check that the host sent this not someone else
-		if n.Details.VpnIp != vpnIp {
-			l.WithField("vpnIp", IntIp(vpnIp)).WithField("answer", IntIp(n.Details.VpnIp)).Debugln("Host sent invalid update")
-			return
-		}
-		for _, a := range n.Details.IpAndPorts {
-			ans := NewUDPAddr(a.Ip, uint16(a.Port))
-			lh.AddRemote(n.Details.VpnIp, ans, false)
-		}
+		lhh.handleHostUpdateNotification(n, vpnIp)
+
 	case NebulaMeta_HostMovedNotification:
 	case NebulaMeta_HostPunchNotification:
-		if !lh.IsLighthouseIP(vpnIp) {
+		lhh.handleHostPunchNotification(n, vpnIp, w)
+	}
+}
+
+func (lhh *LightHouseHandler) handleHostQuery(n *NebulaMeta, vpnIp uint32, addr *udpAddr, w EncWriter) {
+	// Exit if we don't answer queries
+	if !lhh.lh.amLighthouse {
+		if lhh.l.Level >= logrus.DebugLevel {
+			lhh.l.Debugln("I don't answer queries, but received from: ", addr)
+		}
+		return
+	}
+
+	//TODO: we can DRY this further
+	reqVpnIP := n.Details.VpnIp
+	//TODO: Maybe instead of marshalling into n we marshal into a new `r` to not nuke our current request data
+	found, ln, err := lhh.lh.queryAndPrepMessage(n.Details.VpnIp, func(c *cache) (int, error) {
+		n = lhh.resetMeta()
+		n.Type = NebulaMeta_HostQueryReply
+		n.Details.VpnIp = reqVpnIP
+
+		lhh.coalesceAnswers(c, n)
+
+		return n.MarshalTo(lhh.pb)
+	})
+
+	if !found {
+		return
+	}
+
+	if err != nil {
+		lhh.l.WithError(err).WithField("vpnIp", IntIp(vpnIp)).Error("Failed to marshal lighthouse host query reply")
+		return
+	}
+
+	lhh.lh.metricTx(NebulaMeta_HostQueryReply, 1)
+	w.SendMessageToVpnIp(lightHouse, 0, vpnIp, lhh.pb[:ln], lhh.nb, lhh.out[:0])
+
+	// This signals the other side to punch some zero byte udp packets
+	found, ln, err = lhh.lh.queryAndPrepMessage(vpnIp, func(c *cache) (int, error) {
+		n = lhh.resetMeta()
+		n.Type = NebulaMeta_HostPunchNotification
+		n.Details.VpnIp = vpnIp
+
+		lhh.coalesceAnswers(c, n)
+
+		return n.MarshalTo(lhh.pb)
+	})
+
+	if !found {
+		return
+	}
+
+	if err != nil {
+		lhh.l.WithError(err).WithField("vpnIp", IntIp(vpnIp)).Error("Failed to marshal lighthouse host was queried for")
+		return
+	}
+
+	lhh.lh.metricTx(NebulaMeta_HostPunchNotification, 1)
+	w.SendMessageToVpnIp(lightHouse, 0, reqVpnIP, lhh.pb[:ln], lhh.nb, lhh.out[:0])
+}
+
+func (lhh *LightHouseHandler) coalesceAnswers(c *cache, n *NebulaMeta) {
+	if c.v4 != nil {
+		if c.v4.learned != nil {
+			n.Details.Ip4AndPorts = append(n.Details.Ip4AndPorts, c.v4.learned)
+		}
+		if c.v4.reported != nil && len(c.v4.reported) > 0 {
+			n.Details.Ip4AndPorts = append(n.Details.Ip4AndPorts, c.v4.reported...)
+		}
+	}
+
+	if c.v6 != nil {
+		if c.v6.learned != nil {
+			n.Details.Ip6AndPorts = append(n.Details.Ip6AndPorts, c.v6.learned)
+		}
+		if c.v6.reported != nil && len(c.v6.reported) > 0 {
+			n.Details.Ip6AndPorts = append(n.Details.Ip6AndPorts, c.v6.reported...)
+		}
+	}
+}
+
+func (lhh *LightHouseHandler) handleHostQueryReply(n *NebulaMeta, vpnIp uint32) {
+	if !lhh.lh.IsLighthouseIP(vpnIp) {
+		return
+	}
+
+	lhh.lh.Lock()
+	am := lhh.lh.unlockedGetRemoteList(n.Details.VpnIp)
+	am.Lock()
+	lhh.lh.Unlock()
+
+	am.unlockedSetV4(vpnIp, n.Details.Ip4AndPorts, lhh.lh.unlockedShouldAddV4)
+	am.unlockedSetV6(vpnIp, n.Details.Ip6AndPorts, lhh.lh.unlockedShouldAddV6)
+	am.Unlock()
+
+	// Non-blocking attempt to trigger, skip if it would block
+	select {
+	case lhh.lh.handshakeTrigger <- n.Details.VpnIp:
+	default:
+	}
+}
+
+func (lhh *LightHouseHandler) handleHostUpdateNotification(n *NebulaMeta, vpnIp uint32) {
+	if !lhh.lh.amLighthouse {
+		if lhh.l.Level >= logrus.DebugLevel {
+			lhh.l.Debugln("I am not a lighthouse, do not take host updates: ", vpnIp)
+		}
+		return
+	}
+
+	//Simple check that the host sent this not someone else
+	if n.Details.VpnIp != vpnIp {
+		if lhh.l.Level >= logrus.DebugLevel {
+			lhh.l.WithField("vpnIp", IntIp(vpnIp)).WithField("answer", IntIp(n.Details.VpnIp)).Debugln("Host sent invalid update")
+		}
+		return
+	}
+
+	lhh.lh.Lock()
+	am := lhh.lh.unlockedGetRemoteList(vpnIp)
+	am.Lock()
+	lhh.lh.Unlock()
+
+	am.unlockedSetV4(vpnIp, n.Details.Ip4AndPorts, lhh.lh.unlockedShouldAddV4)
+	am.unlockedSetV6(vpnIp, n.Details.Ip6AndPorts, lhh.lh.unlockedShouldAddV6)
+	am.Unlock()
+}
+
+func (lhh *LightHouseHandler) handleHostPunchNotification(n *NebulaMeta, vpnIp uint32, w EncWriter) {
+	if !lhh.lh.IsLighthouseIP(vpnIp) {
+		return
+	}
+
+	empty := []byte{0}
+	punch := func(vpnPeer *udpAddr) {
+		if vpnPeer == nil {
 			return
 		}
 
-		empty := []byte{0}
-		for _, a := range n.Details.IpAndPorts {
-			vpnPeer := NewUDPAddr(a.Ip, uint16(a.Port))
-			go func() {
-				time.Sleep(lh.punchDelay)
-				lh.metricHolepunchTx.Inc(1)
-				lh.punchConn.WriteTo(empty, vpnPeer)
+		go func() {
+			time.Sleep(lhh.lh.punchDelay)
+			lhh.lh.metricHolepunchTx.Inc(1)
+			lhh.lh.punchConn.WriteTo(empty, vpnPeer)
+		}()
 
-			}()
-			l.Debugf("Punching %s on %d for %s", IntIp(a.Ip), a.Port, IntIp(n.Details.VpnIp))
-		}
-		// This sends a nebula test packet to the host trying to contact us. In the case
-		// of a double nat or other difficult scenario, this may help establish
-		// a tunnel.
-		if lh.punchBack {
-			go func() {
-				time.Sleep(time.Second * 5)
-				l.Debugf("Sending a nebula test packet to vpn ip %s", IntIp(n.Details.VpnIp))
-				f.SendMessageToVpnIp(test, testRequest, n.Details.VpnIp, []byte(""), make([]byte, 12, 12), make([]byte, mtu))
-			}()
+		if lhh.l.Level >= logrus.DebugLevel {
+			//TODO: lacking the ip we are actually punching on, old: l.Debugf("Punching %s on %d for %s", IntIp(a.Ip), a.Port, IntIp(n.Details.VpnIp))
+			lhh.l.Debugf("Punching on %d for %s", vpnPeer.Port, IntIp(n.Details.VpnIp))
 		}
 	}
-}
 
-func (lh *LightHouse) metricRx(t NebulaMeta_MessageType, i int64) {
-	lh.metrics.Rx(NebulaMessageType(t), 0, i)
-}
-func (lh *LightHouse) metricTx(t NebulaMeta_MessageType, i int64) {
-	lh.metrics.Tx(NebulaMessageType(t), 0, i)
-}
+	for _, a := range n.Details.Ip4AndPorts {
+		punch(NewUDPAddrFromLH4(a))
+	}
 
-/*
-func (f *Interface) sendPathCheck(ci *ConnectionState, endpoint *net.UDPAddr, counter int) {
-	c := ci.messageCounter
-    b := HeaderEncode(nil, Version, uint8(path_check), 0, ci.remoteIndex, c)
-	ci.messageCounter++
+	for _, a := range n.Details.Ip6AndPorts {
+		punch(NewUDPAddrFromLH6(a))
+	}
 
-	if ci.eKey != nil {
-		msg := ci.eKey.EncryptDanger(b, nil, []byte(strconv.Itoa(counter)), c)
-		//msg := ci.eKey.EncryptDanger(b, nil, []byte(fmt.Sprintf("%d", counter)), c)
-		f.outside.WriteTo(msg, endpoint)
-		l.Debugf("path_check sent, remote index: %d, pathCounter %d", ci.remoteIndex, counter)
+	// This sends a nebula test packet to the host trying to contact us. In the case
+	// of a double nat or other difficult scenario, this may help establish
+	// a tunnel.
+	if lhh.lh.punchBack {
+		go func() {
+			time.Sleep(time.Second * 5)
+			if lhh.l.Level >= logrus.DebugLevel {
+				lhh.l.Debugf("Sending a nebula test packet to vpn ip %s", IntIp(n.Details.VpnIp))
+			}
+			//NOTE: we have to allocate a new output buffer here since we are spawning a new goroutine
+			// for each punchBack packet. We should move this into a timerwheel or a single goroutine
+			// managed by a channel.
+			w.SendMessageToVpnIp(test, testRequest, n.Details.VpnIp, []byte(""), make([]byte, 12, 12), make([]byte, mtu))
+		}()
 	}
 }
 
-func (f *Interface) sendPathCheckReply(ci *ConnectionState, endpoint *net.UDPAddr, counter []byte) {
-	c := ci.messageCounter
-    b := HeaderEncode(nil, Version, uint8(path_check_reply), 0, ci.remoteIndex, c)
-	ci.messageCounter++
-
-	if ci.eKey != nil {
-		msg := ci.eKey.EncryptDanger(b, nil, counter, c)
-		f.outside.WriteTo(msg, endpoint)
-		l.Debugln("path_check sent, remote index: ", ci.remoteIndex)
-	}
+// ipMaskContains checks if testIp is contained by ip after applying a cidr
+// zeros is 32 - bits from net.IPMask.Size()
+func ipMaskContains(ip uint32, zeros uint32, testIp uint32) bool {
+	return (testIp^ip)>>zeros == 0
 }
-*/

lighthouse_test.go

@@ -1,6 +1,7 @@
 package nebula
 
 import (
+	"fmt"
 	"net"
 	"testing"
 
@@ -8,6 +9,17 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
+//TODO: Add a test to ensure udpAddr is copied and not reused
+
+func TestOldIPv4Only(t *testing.T) {
+	// This test ensures our new ipv6 enabled LH protobuf IpAndPorts works with the old style to enable backwards compatibility
+	b := []byte{8, 129, 130, 132, 80, 16, 10}
+	var m Ip4AndPort
+	err := proto.Unmarshal(b, &m)
+	assert.NoError(t, err)
+	assert.Equal(t, "10.1.1.1", int2ip(m.GetIp()).String())
+}
+
 func TestNewLhQuery(t *testing.T) {
 	myIp := net.ParseIP("192.1.1.1")
 	myIpint := ip2int(myIp)
@@ -29,70 +41,344 @@ func TestNewLhQuery(t *testing.T) {
 
 }
 
-func TestNewipandportfromudpaddr(t *testing.T) {
-	blah := NewUDPAddrFromString("1.2.2.3:12345")
-	meh := NewIpAndPortFromUDPAddr(*blah)
-	assert.Equal(t, uint32(16908803), meh.Ip)
-	assert.Equal(t, uint32(12345), meh.Port)
-}
-
-func TestNewipandportsfromudpaddrs(t *testing.T) {
-	blah := NewUDPAddrFromString("1.2.2.3:12345")
-	blah2 := NewUDPAddrFromString("9.9.9.9:47828")
-	group := []udpAddr{*blah, *blah2}
-	hah := NewIpAndPortsFromNetIps(group)
-	assert.IsType(t, &[]*IpAndPort{}, hah)
-	//t.Error(reflect.TypeOf(hah))
-
-}
-
 func Test_lhStaticMapping(t *testing.T) {
+	l := NewTestLogger()
 	lh1 := "10.128.0.2"
 	lh1IP := net.ParseIP(lh1)
 
-	udpServer, _ := NewListener("0.0.0.0", 0, true)
+	udpServer, _ := NewListener(l, "0.0.0.0", 0, true)
 
-	meh := NewLightHouse(true, 1, []uint32{ip2int(lh1IP)}, 10, 10003, udpServer, false, 1, false)
-	meh.AddRemote(ip2int(lh1IP), NewUDPAddr(ip2int(lh1IP), uint16(4242)), true)
+	meh := NewLightHouse(l, true, &net.IPNet{IP: net.IP{0, 0, 0, 1}, Mask: net.IPMask{255, 255, 255, 255}}, []uint32{ip2int(lh1IP)}, 10, 10003, udpServer, false, 1, false)
+	meh.AddStaticRemote(ip2int(lh1IP), NewUDPAddr(lh1IP, uint16(4242)))
 	err := meh.ValidateLHStaticEntries()
 	assert.Nil(t, err)
 
 	lh2 := "10.128.0.3"
 	lh2IP := net.ParseIP(lh2)
 
-	meh = NewLightHouse(true, 1, []uint32{ip2int(lh1IP), ip2int(lh2IP)}, 10, 10003, udpServer, false, 1, false)
-	meh.AddRemote(ip2int(lh1IP), NewUDPAddr(ip2int(lh1IP), uint16(4242)), true)
+	meh = NewLightHouse(l, true, &net.IPNet{IP: net.IP{0, 0, 0, 1}, Mask: net.IPMask{255, 255, 255, 255}}, []uint32{ip2int(lh1IP), ip2int(lh2IP)}, 10, 10003, udpServer, false, 1, false)
+	meh.AddStaticRemote(ip2int(lh1IP), NewUDPAddr(lh1IP, uint16(4242)))
 	err = meh.ValidateLHStaticEntries()
 	assert.EqualError(t, err, "Lighthouse 10.128.0.3 does not have a static_host_map entry")
 }
 
-//func NewLightHouse(amLighthouse bool, myIp uint32, ips []string, interval int, nebulaPort int, pc *udpConn, punchBack bool) *LightHouse {
+func BenchmarkLighthouseHandleRequest(b *testing.B) {
+	l := NewTestLogger()
+	lh1 := "10.128.0.2"
+	lh1IP := net.ParseIP(lh1)
 
-/*
-func TestLHQuery(t *testing.T) {
-	//n := NewLhQueryByIpString("10.128.0.3")
-	_, myNet, _ := net.ParseCIDR("10.128.0.0/16")
-	m := NewHostMap(myNet)
-	y, _ := net.ResolveUDPAddr("udp", "10.128.0.3:11111")
-	m.Add(ip2int(net.ParseIP("127.0.0.1")), y)
-	//t.Errorf("%s", m)
-	_ = m
+	udpServer, _ := NewListener(l, "0.0.0.0", 0, true)
 
-	_, n, _ := net.ParseCIDR("127.0.0.1/8")
+	lh := NewLightHouse(l, true, &net.IPNet{IP: net.IP{0, 0, 0, 1}, Mask: net.IPMask{0, 0, 0, 0}}, []uint32{ip2int(lh1IP)}, 10, 10003, udpServer, false, 1, false)
 
-	/*udpServer, err := net.ListenUDP("udp", &net.UDPAddr{Port: 10009})
-	if err != nil {
-		t.Errorf("%s", err)
-	}
+	hAddr := NewUDPAddrFromString("4.5.6.7:12345")
+	hAddr2 := NewUDPAddrFromString("4.5.6.7:12346")
+	lh.addrMap[3] = NewRemoteList()
+	lh.addrMap[3].unlockedSetV4(
+		3,
+		[]*Ip4AndPort{
+			NewIp4AndPort(hAddr.IP, uint32(hAddr.Port)),
+			NewIp4AndPort(hAddr2.IP, uint32(hAddr2.Port)),
+		},
+		func(*Ip4AndPort) bool { return true },
+	)
 
-	meh := NewLightHouse(n, m, []string{"10.128.0.2"}, false, 10, 10003, 10004)
-	//t.Error(m.Hosts)
-	meh2, err := meh.Query(ip2int(net.ParseIP("10.128.0.3")))
-	t.Error(err)
-	if err != nil {
-		return
-	}
-	t.Errorf("%s", meh2)
-	t.Errorf("%s", n)
+	rAddr := NewUDPAddrFromString("1.2.2.3:12345")
+	rAddr2 := NewUDPAddrFromString("1.2.2.3:12346")
+	lh.addrMap[2] = NewRemoteList()
+	lh.addrMap[2].unlockedSetV4(
+		3,
+		[]*Ip4AndPort{
+			NewIp4AndPort(rAddr.IP, uint32(rAddr.Port)),
+			NewIp4AndPort(rAddr2.IP, uint32(rAddr2.Port)),
+		},
+		func(*Ip4AndPort) bool { return true },
+	)
+
+	mw := &mockEncWriter{}
+
+	b.Run("notfound", func(b *testing.B) {
+		lhh := lh.NewRequestHandler()
+		req := &NebulaMeta{
+			Type: NebulaMeta_HostQuery,
+			Details: &NebulaMetaDetails{
+				VpnIp:       4,
+				Ip4AndPorts: nil,
+			},
+		}
+		p, err := proto.Marshal(req)
+		assert.NoError(b, err)
+		for n := 0; n < b.N; n++ {
+			lhh.HandleRequest(rAddr, 2, p, mw)
+		}
+	})
+	b.Run("found", func(b *testing.B) {
+		lhh := lh.NewRequestHandler()
+		req := &NebulaMeta{
+			Type: NebulaMeta_HostQuery,
+			Details: &NebulaMetaDetails{
+				VpnIp:       3,
+				Ip4AndPorts: nil,
+			},
+		}
+		p, err := proto.Marshal(req)
+		assert.NoError(b, err)
+
+		for n := 0; n < b.N; n++ {
+			lhh.HandleRequest(rAddr, 2, p, mw)
+		}
+	})
+}
+
+func TestLighthouse_Memory(t *testing.T) {
+	l := NewTestLogger()
+
+	myUdpAddr0 := &udpAddr{IP: net.ParseIP("10.0.0.2"), Port: 4242}
+	myUdpAddr1 := &udpAddr{IP: net.ParseIP("192.168.0.2"), Port: 4242}
+	myUdpAddr2 := &udpAddr{IP: net.ParseIP("172.16.0.2"), Port: 4242}
+	myUdpAddr3 := &udpAddr{IP: net.ParseIP("100.152.0.2"), Port: 4242}
+	myUdpAddr4 := &udpAddr{IP: net.ParseIP("24.15.0.2"), Port: 4242}
+	myUdpAddr5 := &udpAddr{IP: net.ParseIP("192.168.0.2"), Port: 4243}
+	myUdpAddr6 := &udpAddr{IP: net.ParseIP("192.168.0.2"), Port: 4244}
+	myUdpAddr7 := &udpAddr{IP: net.ParseIP("192.168.0.2"), Port: 4245}
+	myUdpAddr8 := &udpAddr{IP: net.ParseIP("192.168.0.2"), Port: 4246}
+	myUdpAddr9 := &udpAddr{IP: net.ParseIP("192.168.0.2"), Port: 4247}
+	myUdpAddr10 := &udpAddr{IP: net.ParseIP("192.168.0.2"), Port: 4248}
+	myUdpAddr11 := &udpAddr{IP: net.ParseIP("192.168.0.2"), Port: 4249}
+	myVpnIp := ip2int(net.ParseIP("10.128.0.2"))
+
+	theirUdpAddr0 := &udpAddr{IP: net.ParseIP("10.0.0.3"), Port: 4242}
+	theirUdpAddr1 := &udpAddr{IP: net.ParseIP("192.168.0.3"), Port: 4242}
+	theirUdpAddr2 := &udpAddr{IP: net.ParseIP("172.16.0.3"), Port: 4242}
+	theirUdpAddr3 := &udpAddr{IP: net.ParseIP("100.152.0.3"), Port: 4242}
+	theirUdpAddr4 := &udpAddr{IP: net.ParseIP("24.15.0.3"), Port: 4242}
+	theirVpnIp := ip2int(net.ParseIP("10.128.0.3"))
+
+	udpServer, _ := NewListener(l, "0.0.0.0", 0, true)
+	lh := NewLightHouse(l, true, &net.IPNet{IP: net.IP{10, 128, 0, 1}, Mask: net.IPMask{255, 255, 255, 0}}, []uint32{}, 10, 10003, udpServer, false, 1, false)
+	lhh := lh.NewRequestHandler()
+
+	// Test that my first update responds with just that
+	newLHHostUpdate(myUdpAddr0, myVpnIp, []*udpAddr{myUdpAddr1, myUdpAddr2}, lhh)
+	r := newLHHostRequest(myUdpAddr0, myVpnIp, myVpnIp, lhh)
+	assertIp4InArray(t, r.msg.Details.Ip4AndPorts, myUdpAddr1, myUdpAddr2)
+
+	// Ensure we don't accumulate addresses
+	newLHHostUpdate(myUdpAddr0, myVpnIp, []*udpAddr{myUdpAddr3}, lhh)
+	r = newLHHostRequest(myUdpAddr0, myVpnIp, myVpnIp, lhh)
+	assertIp4InArray(t, r.msg.Details.Ip4AndPorts, myUdpAddr3)
+
+	// Grow it back to 2
+	newLHHostUpdate(myUdpAddr0, myVpnIp, []*udpAddr{myUdpAddr1, myUdpAddr4}, lhh)
+	r = newLHHostRequest(myUdpAddr0, myVpnIp, myVpnIp, lhh)
+	assertIp4InArray(t, r.msg.Details.Ip4AndPorts, myUdpAddr1, myUdpAddr4)
+
+	// Update a different host
+	newLHHostUpdate(theirUdpAddr0, theirVpnIp, []*udpAddr{theirUdpAddr1, theirUdpAddr2, theirUdpAddr3, theirUdpAddr4}, lhh)
+	r = newLHHostRequest(theirUdpAddr0, theirVpnIp, myVpnIp, lhh)
+	assertIp4InArray(t, r.msg.Details.Ip4AndPorts, theirUdpAddr1, theirUdpAddr2, theirUdpAddr3, theirUdpAddr4)
+
+	// Make sure we didn't get changed
+	r = newLHHostRequest(myUdpAddr0, myVpnIp, myVpnIp, lhh)
+	assertIp4InArray(t, r.msg.Details.Ip4AndPorts, myUdpAddr1, myUdpAddr4)
+
+	// Ensure proper ordering and limiting
+	// Send 12 addrs, get 10 back, the last 2 removed, allowing the duplicate to remain (clients dedupe)
+	newLHHostUpdate(
+		myUdpAddr0,
+		myVpnIp,
+		[]*udpAddr{
+			myUdpAddr1,
+			myUdpAddr2,
+			myUdpAddr3,
+			myUdpAddr4,
+			myUdpAddr5,
+			myUdpAddr5, //Duplicated on purpose
+			myUdpAddr6,
+			myUdpAddr7,
+			myUdpAddr8,
+			myUdpAddr9,
+			myUdpAddr10,
+			myUdpAddr11, // This should get cut
+		}, lhh)
+
+	r = newLHHostRequest(myUdpAddr0, myVpnIp, myVpnIp, lhh)
+	assertIp4InArray(
+		t,
+		r.msg.Details.Ip4AndPorts,
+		myUdpAddr1, myUdpAddr2, myUdpAddr3, myUdpAddr4, myUdpAddr5, myUdpAddr5, myUdpAddr6, myUdpAddr7, myUdpAddr8, myUdpAddr9,
+	)
+
+	// Make sure we won't add ips in our vpn network
+	bad1 := &udpAddr{IP: net.ParseIP("10.128.0.99"), Port: 4242}
+	bad2 := &udpAddr{IP: net.ParseIP("10.128.0.100"), Port: 4242}
+	good := &udpAddr{IP: net.ParseIP("1.128.0.99"), Port: 4242}
+	newLHHostUpdate(myUdpAddr0, myVpnIp, []*udpAddr{bad1, bad2, good}, lhh)
+	r = newLHHostRequest(myUdpAddr0, myVpnIp, myVpnIp, lhh)
+	assertIp4InArray(t, r.msg.Details.Ip4AndPorts, good)
+}
+
+func newLHHostRequest(fromAddr *udpAddr, myVpnIp, queryVpnIp uint32, lhh *LightHouseHandler) testLhReply {
+	req := &NebulaMeta{
+		Type: NebulaMeta_HostQuery,
+		Details: &NebulaMetaDetails{
+			VpnIp: queryVpnIp,
+		},
+	}
+
+	b, err := req.Marshal()
+	if err != nil {
+		panic(err)
+	}
+
+	w := &testEncWriter{}
+	lhh.HandleRequest(fromAddr, myVpnIp, b, w)
+	return w.lastReply
+}
+
+func newLHHostUpdate(fromAddr *udpAddr, vpnIp uint32, addrs []*udpAddr, lhh *LightHouseHandler) {
+	req := &NebulaMeta{
+		Type: NebulaMeta_HostUpdateNotification,
+		Details: &NebulaMetaDetails{
+			VpnIp:       vpnIp,
+			Ip4AndPorts: make([]*Ip4AndPort, len(addrs)),
+		},
+	}
+
+	for k, v := range addrs {
+		req.Details.Ip4AndPorts[k] = &Ip4AndPort{Ip: ip2int(v.IP), Port: uint32(v.Port)}
+	}
+
+	b, err := req.Marshal()
+	if err != nil {
+		panic(err)
+	}
+
+	w := &testEncWriter{}
+	lhh.HandleRequest(fromAddr, vpnIp, b, w)
+}
+
+//TODO: this is a RemoteList test
+//func Test_lhRemoteAllowList(t *testing.T) {
+//	l := NewTestLogger()
+//	c := NewConfig(l)
+//	c.Settings["remoteallowlist"] = map[interface{}]interface{}{
+//		"10.20.0.0/12": false,
+//	}
+//	allowList, err := c.GetAllowList("remoteallowlist", false)
+//	assert.Nil(t, err)
+//
+//	lh1 := "10.128.0.2"
+//	lh1IP := net.ParseIP(lh1)
+//
+//	udpServer, _ := NewListener(l, "0.0.0.0", 0, true)
+//
+//	lh := NewLightHouse(l, true, &net.IPNet{IP: net.IP{0, 0, 0, 1}, Mask: net.IPMask{255, 255, 255, 0}}, []uint32{ip2int(lh1IP)}, 10, 10003, udpServer, false, 1, false)
+//	lh.SetRemoteAllowList(allowList)
+//
+//	// A disallowed ip should not enter the cache but we should end up with an empty entry in the addrMap
+//	remote1IP := net.ParseIP("10.20.0.3")
+//	remotes := lh.unlockedGetRemoteList(ip2int(remote1IP))
+//	remotes.unlockedPrependV4(ip2int(remote1IP), NewIp4AndPort(remote1IP, 4242))
+//	assert.NotNil(t, lh.addrMap[ip2int(remote1IP)])
+//	assert.Empty(t, lh.addrMap[ip2int(remote1IP)].CopyAddrs([]*net.IPNet{}))
+//
+//	// Make sure a good ip enters the cache and addrMap
+//	remote2IP := net.ParseIP("10.128.0.3")
+//	remote2UDPAddr := NewUDPAddr(remote2IP, uint16(4242))
+//	lh.addRemoteV4(ip2int(remote2IP), ip2int(remote2IP), NewIp4AndPort(remote2UDPAddr.IP, uint32(remote2UDPAddr.Port)), false, false)
+//	assertUdpAddrInArray(t, lh.addrMap[ip2int(remote2IP)].CopyAddrs([]*net.IPNet{}), remote2UDPAddr)
+//
+//	// Another good ip gets into the cache, ordering is inverted
+//	remote3IP := net.ParseIP("10.128.0.4")
+//	remote3UDPAddr := NewUDPAddr(remote3IP, uint16(4243))
+//	lh.addRemoteV4(ip2int(remote2IP), ip2int(remote2IP), NewIp4AndPort(remote3UDPAddr.IP, uint32(remote3UDPAddr.Port)), false, false)
+//	assertUdpAddrInArray(t, lh.addrMap[ip2int(remote2IP)].CopyAddrs([]*net.IPNet{}), remote2UDPAddr, remote3UDPAddr)
+//
+//	// If we exceed the length limit we should only have the most recent addresses
+//	addedAddrs := []*udpAddr{}
+//	for i := 0; i < 11; i++ {
+//		remoteUDPAddr := NewUDPAddr(net.IP{10, 128, 0, 4}, uint16(4243+i))
+//		lh.addRemoteV4(ip2int(remote2IP), ip2int(remote2IP), NewIp4AndPort(remoteUDPAddr.IP, uint32(remoteUDPAddr.Port)), false, false)
+//		// The first entry here is a duplicate, don't add it to the assert list
+//		if i != 0 {
+//			addedAddrs = append(addedAddrs, remoteUDPAddr)
+//		}
+//	}
+//
+//	// We should only have the last 10 of what we tried to add
+//	assert.True(t, len(addedAddrs) >= 10, "We should have tried to add at least 10 addresses")
+//	assertUdpAddrInArray(
+//		t,
+//		lh.addrMap[ip2int(remote2IP)].CopyAddrs([]*net.IPNet{}),
+//		addedAddrs[0],
+//		addedAddrs[1],
+//		addedAddrs[2],
+//		addedAddrs[3],
+//		addedAddrs[4],
+//		addedAddrs[5],
+//		addedAddrs[6],
+//		addedAddrs[7],
+//		addedAddrs[8],
+//		addedAddrs[9],
+//	)
+//}
+
+func Test_ipMaskContains(t *testing.T) {
+	assert.True(t, ipMaskContains(ip2int(net.ParseIP("10.0.0.1")), 32-24, ip2int(net.ParseIP("10.0.0.255"))))
+	assert.False(t, ipMaskContains(ip2int(net.ParseIP("10.0.0.1")), 32-24, ip2int(net.ParseIP("10.0.1.1"))))
+	assert.True(t, ipMaskContains(ip2int(net.ParseIP("10.0.0.1")), 32, ip2int(net.ParseIP("10.0.1.1"))))
+}
+
+type testLhReply struct {
+	nebType    NebulaMessageType
+	nebSubType NebulaMessageSubType
+	vpnIp      uint32
+	msg        *NebulaMeta
+}
+
+type testEncWriter struct {
+	lastReply testLhReply
+}
+
+func (tw *testEncWriter) SendMessageToVpnIp(t NebulaMessageType, st NebulaMessageSubType, vpnIp uint32, p, _, _ []byte) {
+	tw.lastReply = testLhReply{
+		nebType:    t,
+		nebSubType: st,
+		vpnIp:      vpnIp,
+		msg:        &NebulaMeta{},
+	}
+
+	err := proto.Unmarshal(p, tw.lastReply.msg)
+	if err != nil {
+		panic(err)
+	}
+}
+
+// assertIp4InArray asserts every address in want is at the same position in have and that the lengths match
+func assertIp4InArray(t *testing.T, have []*Ip4AndPort, want ...*udpAddr) {
+	assert.Len(t, have, len(want))
+	for k, w := range want {
+		if !(have[k].Ip == ip2int(w.IP) && have[k].Port == uint32(w.Port)) {
+			assert.Fail(t, fmt.Sprintf("Response did not contain: %v:%v at %v; %v", w.IP, w.Port, k, translateV4toUdpAddr(have)))
+		}
+	}
+}
+
+// assertUdpAddrInArray asserts every address in want is at the same position in have and that the lengths match
+func assertUdpAddrInArray(t *testing.T, have []*udpAddr, want ...*udpAddr) {
+	assert.Len(t, have, len(want))
+	for k, w := range want {
+		if !(have[k].IP.Equal(w.IP) && have[k].Port == w.Port) {
+			assert.Fail(t, fmt.Sprintf("Response did not contain: %v at %v; %v", w, k, have))
+		}
+	}
+}
+
+func translateV4toUdpAddr(ips []*Ip4AndPort) []*udpAddr {
+	addrs := make([]*udpAddr, len(ips))
+	for k, v := range ips {
+		addrs[k] = NewUDPAddrFromLH4(v)
+	}
+	return addrs
 }
-*/

main.go

@@ -4,8 +4,6 @@ import (
 	"encoding/binary"
 	"fmt"
 	"net"
-	"strconv"
-	"strings"
 	"time"
 
 	"github.com/sirupsen/logrus"
@@ -13,13 +11,10 @@ import (
 	"gopkg.in/yaml.v2"
 )
 
-// The caller should provide a real logger, we have one just in case
-var l = logrus.New()
-
 type m map[string]interface{}
 
 func Main(config *Config, configTest bool, buildVersion string, logger *logrus.Logger, tunFd *int) (*Control, error) {
-	l = logger
+	l := logger
 	l.Formatter = &logrus.TextFormatter{
 		FullTimestamp: true,
 	}
@@ -47,13 +42,12 @@ func Main(config *Config, configTest bool, buildVersion string, logger *logrus.L
 		}
 	})
 
-	// trustedCAs is currently a global, so loadCA operates on that global directly
-	trustedCAs, err = loadCAFromConfig(config)
+	caPool, err := loadCAFromConfig(l, config)
 	if err != nil {
 		//The errors coming out of loadCA are already nicely formatted
 		return nil, NewContextualError("Failed to load ca from config", nil, err)
 	}
-	l.WithField("fingerprints", trustedCAs.GetFingerprints()).Debug("Trusted CA fingerprints")
+	l.WithField("fingerprints", caPool.GetFingerprints()).Debug("Trusted CA fingerprints")
 
 	cs, err := NewCertStateFromConfig(config)
 	if err != nil {
@@ -62,7 +56,7 @@ func Main(config *Config, configTest bool, buildVersion string, logger *logrus.L
 	}
 	l.WithField("cert", cs.certificate).Debug("Client nebula certificate")
 
-	fw, err := NewFirewallFromConfig(cs.certificate, config)
+	fw, err := NewFirewallFromConfig(l, cs.certificate, config)
 	if err != nil {
 		return nil, NewContextualError("Error while loading firewall rules", nil, err)
 	}
@@ -80,9 +74,10 @@ func Main(config *Config, configTest bool, buildVersion string, logger *logrus.L
 	}
 
 	ssh, err := sshd.NewSSHServer(l.WithField("subsystem", "sshd"))
-	wireSSHReload(ssh, config)
+	wireSSHReload(l, ssh, config)
+	var sshStart func()
 	if config.GetBool("sshd.enabled", false) {
-		err = configSSH(ssh, config)
+		sshStart, err = configSSH(l, ssh, config)
 		if err != nil {
 			return nil, NewContextualError("Error while configuring the sshd", nil, err)
 		}
@@ -93,15 +88,52 @@ func Main(config *Config, configTest bool, buildVersion string, logger *logrus.L
 	// tun config, listeners, anything modifying the computer should be below
 	////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 
+	var routines int
+
+	// If `routines` is set, use that and ignore the specific values
+	if routines = config.GetInt("routines", 0); routines != 0 {
+		if routines < 1 {
+			routines = 1
+		}
+		if routines > 1 {
+			l.WithField("routines", routines).Info("Using multiple routines")
+		}
+	} else {
+		// deprecated and undocumented
+		tunQueues := config.GetInt("tun.routines", 1)
+		udpQueues := config.GetInt("listen.routines", 1)
+		if tunQueues > udpQueues {
+			routines = tunQueues
+		} else {
+			routines = udpQueues
+		}
+		if routines != 1 {
+			l.WithField("routines", routines).Warn("Setting tun.routines and listen.routines is deprecated. Use `routines` instead")
+		}
+	}
+
+	// EXPERIMENTAL
+	// Intentionally not documented yet while we do more testing and determine
+	// a good default value.
+	conntrackCacheTimeout := config.GetDuration("firewall.conntrack.routine_cache_timeout", 0)
+	if routines > 1 && !config.IsSet("firewall.conntrack.routine_cache_timeout") {
+		// Use a different default if we are running with multiple routines
+		conntrackCacheTimeout = 1 * time.Second
+	}
+	if conntrackCacheTimeout > 0 {
+		l.WithField("duration", conntrackCacheTimeout).Info("Using routine-local conntrack cache")
+	}
+
 	var tun Inside
 	if !configTest {
 		config.CatchHUP()
 
 		switch {
 		case config.GetBool("tun.disabled", false):
-			tun = newDisabledTun(tunCidr, l)
+			tun = newDisabledTun(tunCidr, config.GetInt("tun.tx_queue", 500), config.GetBool("stats.message_metrics", false), l)
 		case tunFd != nil:
 			tun, err = newTunFromFd(
+				l,
 				*tunFd,
 				tunCidr,
 				config.GetInt("tun.mtu", DEFAULT_MTU),
@@ -111,12 +143,14 @@ func Main(config *Config, configTest bool, buildVersion string, logger *logrus.L
 			)
 		default:
 			tun, err = newTun(
+				l,
 				config.GetString("tun.dev", ""),
 				tunCidr,
 				config.GetInt("tun.mtu", DEFAULT_MTU),
 				routes,
 				unsafeRoutes,
 				config.GetInt("tun.tx_queue", 500),
+				routines > 1,
 			)
 		}
 
@@ -126,15 +160,27 @@ func Main(config *Config, configTest bool, buildVersion string, logger *logrus.L
 	}
 
 	// set up our UDP listener
-	udpQueues := config.GetInt("listen.routines", 1)
-	var udpServer *udpConn
+	udpConns := make([]*udpConn, routines)
+	port := config.GetInt("listen.port", 0)
 
 	if !configTest {
-		udpServer, err = NewListener(config.GetString("listen.host", "0.0.0.0"), config.GetInt("listen.port", 0), udpQueues > 1)
-		if err != nil {
-			return nil, NewContextualError("Failed to open udp listener", nil, err)
+		for i := 0; i < routines; i++ {
+			udpServer, err := NewListener(l, config.GetString("listen.host", "0.0.0.0"), port, routines > 1)
+			if err != nil {
+				return nil, NewContextualError("Failed to open udp listener", m{"queue": i}, err)
+			}
+			udpServer.reloadConfig(config)
+			udpConns[i] = udpServer
+
+			// If port is dynamic, discover it
+			if port == 0 {
+				uPort, err := udpServer.LocalAddr()
+				if err != nil {
+					return nil, NewContextualError("Failed to get listening port", nil, err)
+				}
+				port = int(uPort.Port)
+			}
 		}
-		udpServer.reloadConfig(config)
 	}
 
 	// Set up my internal host map
@@ -175,8 +221,8 @@ func Main(config *Config, configTest bool, buildVersion string, logger *logrus.L
 		}
 	}
 
-	hostMap := NewHostMap("main", tunCidr, preferredRanges)
-	hostMap.SetDefaultRoute(ip2int(net.ParseIP(config.GetString("default_route", "0.0.0.0"))))
+	hostMap := NewHostMap(l, "main", tunCidr, preferredRanges)
+
 	hostMap.addUnsafeRoutes(&unsafeRoutes)
 	hostMap.metricsEnabled = config.GetBool("stats.message_metrics", false)
 
@@ -190,21 +236,16 @@ func Main(config *Config, configTest bool, buildVersion string, logger *logrus.L
 	punchy := NewPunchyFromConfig(config)
 	if punchy.Punch && !configTest {
 		l.Info("UDP hole punching enabled")
-		go hostMap.Punchy(udpServer)
-	}
-
-	port := config.GetInt("listen.port", 0)
-	// If port is dynamic, discover it
-	if port == 0 && !configTest {
-		uPort, err := udpServer.LocalAddr()
-		if err != nil {
-			return nil, NewContextualError("Failed to get listening port", nil, err)
-		}
-		port = int(uPort.Port)
+		go hostMap.Punchy(udpConns[0])
 	}
 
 	amLighthouse := config.GetBool("lighthouse.am_lighthouse", false)
 
+	// fatal if am_lighthouse is enabled but we are using an ephemeral port
+	if amLighthouse && (config.GetInt("listen.port", 0) == 0) {
+		return nil, NewContextualError("lighthouse.am_lighthouse enabled on node but no port number is set in config", nil, nil)
+	}
+
 	// warn if am_lighthouse is enabled but upstream lighthouses exists
 	rawLighthouseHosts := config.GetStringSlice("lighthouse.hosts", []string{})
 	if amLighthouse && len(rawLighthouseHosts) != 0 {
@@ -224,13 +265,14 @@ func Main(config *Config, configTest bool, buildVersion string, logger *logrus.L
 	}
 
 	lightHouse := NewLightHouse(
+		l,
 		amLighthouse,
-		ip2int(tunCidr.IP),
+		tunCidr,
 		lighthouseHosts,
 		//TODO: change to a duration
 		config.GetInt("lighthouse.interval", 10),
-		port,
-		udpServer,
+		uint32(port),
+		udpConns[0],
 		punchy.Respond,
 		punchy.Delay,
 		config.GetBool("stats.lighthouse_metrics", false),
@@ -257,29 +299,18 @@ func Main(config *Config, configTest bool, buildVersion string, logger *logrus.L
 		vals, ok := v.([]interface{})
 		if ok {
 			for _, v := range vals {
-				parts := strings.Split(fmt.Sprintf("%v", v), ":")
-				addr, err := net.ResolveIPAddr("ip", parts[0])
-				if err == nil {
-					ip := addr.IP
-					port, err := strconv.Atoi(parts[1])
-					if err != nil {
-						return nil, NewContextualError("Static host address could not be parsed", m{"vpnIp": vpnIp}, err)
-					}
-					lightHouse.AddRemote(ip2int(vpnIp), NewUDPAddr(ip2int(ip), uint16(port)), true)
-				}
-			}
-		} else {
-			//TODO: make this all a helper
-			parts := strings.Split(fmt.Sprintf("%v", v), ":")
-			addr, err := net.ResolveIPAddr("ip", parts[0])
-			if err == nil {
-				ip := addr.IP
-				port, err := strconv.Atoi(parts[1])
+				ip, port, err := parseIPAndPort(fmt.Sprintf("%v", v))
 				if err != nil {
 					return nil, NewContextualError("Static host address could not be parsed", m{"vpnIp": vpnIp}, err)
 				}
-				lightHouse.AddRemote(ip2int(vpnIp), NewUDPAddr(ip2int(ip), uint16(port)), true)
+				lightHouse.AddStaticRemote(ip2int(vpnIp), NewUDPAddr(ip, port))
 			}
+		} else {
+			ip, port, err := parseIPAndPort(fmt.Sprintf("%v", v))
+			if err != nil {
+				return nil, NewContextualError("Static host address could not be parsed", m{"vpnIp": vpnIp}, err)
+			}
+			lightHouse.AddStaticRemote(ip2int(vpnIp), NewUDPAddr(ip, port))
 		}
 	}
 
@@ -298,26 +329,33 @@ func Main(config *Config, configTest bool, buildVersion string, logger *logrus.L
 	handshakeConfig := HandshakeConfig{
 		tryInterval:   config.GetDuration("handshakes.try_interval", DefaultHandshakeTryInterval),
 		retries:       config.GetInt("handshakes.retries", DefaultHandshakeRetries),
-		waitRotation:  config.GetInt("handshakes.wait_rotation", DefaultHandshakeWaitRotation),
 		triggerBuffer: config.GetInt("handshakes.trigger_buffer", DefaultHandshakeTriggerBuffer),
 
 		messageMetrics: messageMetrics,
 	}
 
-	handshakeManager := NewHandshakeManager(tunCidr, preferredRanges, hostMap, lightHouse, udpServer, handshakeConfig)
+	handshakeManager := NewHandshakeManager(l, tunCidr, preferredRanges, hostMap, lightHouse, udpConns[0], handshakeConfig)
 	lightHouse.handshakeTrigger = handshakeManager.trigger
 
 	//TODO: These will be reused for psk
 	//handshakeMACKey := config.GetString("handshake_mac.key", "")
 	//handshakeAcceptedMACKeys := config.GetStringSlice("handshake_mac.accepted_keys", []string{})
 
-	serveDns := config.GetBool("lighthouse.serve_dns", false)
+	serveDns := false
+	if config.GetBool("lighthouse.serve_dns", false) {
+		if config.GetBool("lighthouse.am_lighthouse", false) {
+			serveDns = true
+		} else {
+			l.Warn("DNS server refusing to run because this host is not a lighthouse.")
+		}
+	}
+
 	checkInterval := config.GetInt("timers.connection_alive_interval", 5)
 	pendingDeletionInterval := config.GetInt("timers.pending_deletion_interval", 10)
 	ifConfig := &InterfaceConfig{
 		HostMap:                 hostMap,
 		Inside:                  tun,
-		Outside:                 udpServer,
+		Outside:                 udpConns[0],
 		certState:               cs,
 		Cipher:                  config.GetString("cipher", "aes"),
 		Firewall:                fw,
@@ -329,10 +367,13 @@ func Main(config *Config, configTest bool, buildVersion string, logger *logrus.L
 		DropLocalBroadcast:      config.GetBool("tun.drop_local_broadcast", false),
 		DropMulticast:           config.GetBool("tun.drop_multicast", false),
 		UDPBatchSize:            config.GetInt("listen.batch", 64),
-		udpQueues:               udpQueues,
-		tunQueues:               config.GetInt("tun.routines", 1),
+		routines:                routines,
 		MessageMetrics:          messageMetrics,
 		version:                 buildVersion,
+		caPool:                  caPool,
+
+		ConntrackCacheTimeout: conntrackCacheTimeout,
+		l:                     l,
 	}
 
 	switch ifConfig.Cipher {
@@ -351,13 +392,17 @@ func Main(config *Config, configTest bool, buildVersion string, logger *logrus.L
 			return nil, fmt.Errorf("failed to initialize interface: %s", err)
 		}
 
+		// TODO: Better way to attach these, probably want a new interface in InterfaceConfig
+		// I don't want to make this initial commit too far-reaching though
+		ifce.writers = udpConns
+
 		ifce.RegisterConfigChangeCallbacks(config)
 
 		go handshakeManager.Run(ifce)
 		go lightHouse.LhUpdateWorker(ifce)
 	}
 
-	err = startStats(config, configTest)
+	statsStart, err := startStats(l, config, buildVersion, configTest)
 	if err != nil {
 		return nil, NewContextualError("Failed to start stats emitter", nil, err)
 	}
@@ -369,13 +414,14 @@ func Main(config *Config, configTest bool, buildVersion string, logger *logrus.L
 	//TODO: check if we _should_ be emitting stats
 	go ifce.emitStats(config.GetDuration("stats.interval", time.Second*10))
 
-	attachCommands(ssh, hostMap, handshakeManager.pendingHostMap, lightHouse, ifce)
+	attachCommands(l, ssh, hostMap, handshakeManager.pendingHostMap, lightHouse, ifce)
 
 	// Start DNS server last to allow using the nebula IP as lighthouse.dns.host
+	var dnsStart func()
 	if amLighthouse && serveDns {
 		l.Debugln("Starting dns server")
-		go dnsMain(hostMap, config)
+		dnsStart = dnsMain(l, hostMap, config)
 	}
 
-	return &Control{ifce, l}, nil
+	return &Control{ifce, l, sshStart, statsStart, dnsStart}, nil
 }

main_test.go

@@ -1 +1,30 @@
 package nebula
+
+import (
+	"io/ioutil"
+	"os"
+
+	"github.com/sirupsen/logrus"
+)
+
+func NewTestLogger() *logrus.Logger {
+	l := logrus.New()
+
+	v := os.Getenv("TEST_LOGS")
+	if v == "" {
+		l.SetOutput(ioutil.Discard)
+		return l
+	}
+
+	switch v {
+	case "1":
+		// This is the default level but we are being explicit
+		l.SetLevel(logrus.InfoLevel)
+	case "2":
+		l.SetLevel(logrus.DebugLevel)
+	case "3":
+		l.SetLevel(logrus.TraceLevel)
+	}
+
+	return l
+}

nebula.proto

@@ -1,6 +1,8 @@
 syntax = "proto3";
 package nebula;
 
+option go_package = "github.com/slackhq/nebula";
+
 message NebulaMeta {
   enum MessageType {
     None = 0;
@@ -20,19 +22,23 @@ message NebulaMeta {
   NebulaMetaDetails Details = 2;
 }
 
-
 message NebulaMetaDetails {
-
   uint32 VpnIp = 1;
-  repeated IpAndPort IpAndPorts = 2;
+  repeated Ip4AndPort Ip4AndPorts = 2;
+  repeated Ip6AndPort Ip6AndPorts = 4;
   uint32 counter = 3;
 }
 
-message IpAndPort {
+message Ip4AndPort {
   uint32 Ip = 1;
   uint32 Port = 2;
 }
 
+message Ip6AndPort {
+  uint64 Hi = 1;
+  uint64 Lo = 2;
+  uint32 Port = 3;
+}
 
 message NebulaPing {
   enum MessageType {

outside.go

@@ -17,14 +17,14 @@ const (
 	minFwPacketLen = 4
 )
 
-func (f *Interface) readOutsidePackets(addr *udpAddr, out []byte, packet []byte, header *Header, fwPacket *FirewallPacket, nb []byte) {
+func (f *Interface) readOutsidePackets(addr *udpAddr, out []byte, packet []byte, header *Header, fwPacket *FirewallPacket, lhh *LightHouseHandler, nb []byte, q int, localCache ConntrackCache) {
 	err := header.Parse(packet)
 	if err != nil {
 		// TODO: best if we return this and let caller log
 		// TODO: Might be better to send the literal []byte("holepunch") packet and ignore that?
 		// Hole punch packets are 0 or 1 byte big, so lets ignore printing those errors
 		if len(packet) > 1 {
-			l.WithField("packet", packet).Infof("Error while parsing inbound packet from %s: %s", addr, err)
+			f.l.WithField("packet", packet).Infof("Error while parsing inbound packet from %s: %s", addr, err)
 		}
 		return
 	}
@@ -39,49 +39,138 @@ func (f *Interface) readOutsidePackets(addr *udpAddr, out []byte, packet []byte,
 		ci = hostinfo.ConnectionState
 	}
 
-	handle := f.handlers[header.Version][header.Type][header.Subtype]
+	switch header.Type {
+	case message:
+		if !f.handleEncrypted(ci, addr, header) {
+			return
+		}
 
-	if handle == nil {
+		f.decryptToTun(hostinfo, header.MessageCounter, out, packet, fwPacket, nb, q, localCache)
+
+		// Fallthrough to the bottom to record incoming traffic
+
+	case lightHouse:
 		f.messageMetrics.Rx(header.Type, header.Subtype, 1)
-		hostinfo.logger().Debugf("Unexpected packet received from %s", addr)
+		if !f.handleEncrypted(ci, addr, header) {
+			return
+		}
+
+		d, err := f.decrypt(hostinfo, header.MessageCounter, out, packet, header, nb)
+		if err != nil {
+			hostinfo.logger(f.l).WithError(err).WithField("udpAddr", addr).
+				WithField("packet", packet).
+				Error("Failed to decrypt lighthouse packet")
+
+			//TODO: maybe after build 64 is out? 06/14/2018 - NB
+			//f.sendRecvError(net.Addr(addr), header.RemoteIndex)
+			return
+		}
+
+		lhh.HandleRequest(addr, hostinfo.hostId, d, f)
+
+		// Fallthrough to the bottom to record incoming traffic
+
+	case test:
+		f.messageMetrics.Rx(header.Type, header.Subtype, 1)
+		if !f.handleEncrypted(ci, addr, header) {
+			return
+		}
+
+		d, err := f.decrypt(hostinfo, header.MessageCounter, out, packet, header, nb)
+		if err != nil {
+			hostinfo.logger(f.l).WithError(err).WithField("udpAddr", addr).
+				WithField("packet", packet).
+				Error("Failed to decrypt test packet")
+
+			//TODO: maybe after build 64 is out? 06/14/2018 - NB
+			//f.sendRecvError(net.Addr(addr), header.RemoteIndex)
+			return
+		}
+
+		if header.Subtype == testRequest {
+			// This testRequest might be from TryPromoteBest, so we should roam
+			// to the new IP address before responding
+			f.handleHostRoaming(hostinfo, addr)
+			f.send(test, testReply, ci, hostinfo, hostinfo.remote, d, nb, out)
+		}
+
+		// Fallthrough to the bottom to record incoming traffic
+
+		// Non encrypted messages below here, they should not fall through to avoid tracking incoming traffic since they
+		// are unauthenticated
+
+	case handshake:
+		f.messageMetrics.Rx(header.Type, header.Subtype, 1)
+		HandleIncomingHandshake(f, addr, packet, header, hostinfo)
+		return
+
+	case recvError:
+		f.messageMetrics.Rx(header.Type, header.Subtype, 1)
+		f.handleRecvError(addr, header)
+		return
+
+	case closeTunnel:
+		f.messageMetrics.Rx(header.Type, header.Subtype, 1)
+		if !f.handleEncrypted(ci, addr, header) {
+			return
+		}
+
+		hostinfo.logger(f.l).WithField("udpAddr", addr).
+			Info("Close tunnel received, tearing down.")
+
+		f.closeTunnel(hostinfo, false)
+		return
+
+	default:
+		f.messageMetrics.Rx(header.Type, header.Subtype, 1)
+		hostinfo.logger(f.l).Debugf("Unexpected packet received from %s", addr)
 		return
 	}
 
-	handle(hostinfo, ci, addr, header, out, packet, fwPacket, nb)
+	f.handleHostRoaming(hostinfo, addr)
+
+	f.connectionManager.In(hostinfo.hostId)
 }
 
-func (f *Interface) closeTunnel(hostInfo *HostInfo) {
+// closeTunnel closes a tunnel locally, it does not send a closeTunnel packet to the remote
+func (f *Interface) closeTunnel(hostInfo *HostInfo, hasHostMapLock bool) {
 	//TODO: this would be better as a single function in ConnectionManager that handled locks appropriately
 	f.connectionManager.ClearIP(hostInfo.hostId)
 	f.connectionManager.ClearPendingDeletion(hostInfo.hostId)
 	f.lightHouse.DeleteVpnIP(hostInfo.hostId)
-	f.hostMap.DeleteVpnIP(hostInfo.hostId)
-	f.hostMap.DeleteIndex(hostInfo.localIndexId)
+
+	if hasHostMapLock {
+		f.hostMap.unlockedDeleteHostInfo(hostInfo)
+	} else {
+		f.hostMap.DeleteHostInfo(hostInfo)
+	}
+}
+
+// sendCloseTunnel is a helper function to send a proper close tunnel packet to a remote
+func (f *Interface) sendCloseTunnel(h *HostInfo) {
+	f.send(closeTunnel, 0, h.ConnectionState, h, h.remote, []byte{}, make([]byte, 12, 12), make([]byte, mtu))
 }
 
 func (f *Interface) handleHostRoaming(hostinfo *HostInfo, addr *udpAddr) {
 	if hostDidRoam(hostinfo.remote, addr) {
-		if !f.lightHouse.remoteAllowList.Allow(udp2ipInt(addr)) {
-			hostinfo.logger().WithField("newAddr", addr).Debug("lighthouse.remote_allow_list denied roaming")
+		if !f.lightHouse.remoteAllowList.Allow(addr.IP) {
+			hostinfo.logger(f.l).WithField("newAddr", addr).Debug("lighthouse.remote_allow_list denied roaming")
 			return
 		}
-		if !hostinfo.lastRoam.IsZero() && addr.Equals(hostinfo.lastRoamRemote) && time.Since(hostinfo.lastRoam) < RoamingSupressSeconds*time.Second {
-			if l.Level >= logrus.DebugLevel {
-				hostinfo.logger().WithField("udpAddr", hostinfo.remote).WithField("newAddr", addr).
-					Debugf("Supressing roam back to previous remote for %d seconds", RoamingSupressSeconds)
+		if !hostinfo.lastRoam.IsZero() && addr.Equals(hostinfo.lastRoamRemote) && time.Since(hostinfo.lastRoam) < RoamingSuppressSeconds*time.Second {
+			if f.l.Level >= logrus.DebugLevel {
+				hostinfo.logger(f.l).WithField("udpAddr", hostinfo.remote).WithField("newAddr", addr).
+					Debugf("Suppressing roam back to previous remote for %d seconds", RoamingSuppressSeconds)
 			}
 			return
 		}
 
-		hostinfo.logger().WithField("udpAddr", hostinfo.remote).WithField("newAddr", addr).
+		hostinfo.logger(f.l).WithField("udpAddr", hostinfo.remote).WithField("newAddr", addr).
 			Info("Host roamed to new udp ip/port.")
 		hostinfo.lastRoam = time.Now()
 		remoteCopy := *hostinfo.remote
 		hostinfo.lastRoamRemote = &remoteCopy
-		hostinfo.SetRemote(*addr)
-		if f.lightHouse.amLighthouse {
-			f.lightHouse.AddRemote(hostinfo.hostId, addr, false)
-		}
+		hostinfo.SetRemote(addr)
 	}
 
 }
@@ -89,7 +178,7 @@ func (f *Interface) handleHostRoaming(hostinfo *HostInfo, addr *udpAddr) {
 func (f *Interface) handleEncrypted(ci *ConnectionState, addr *udpAddr, header *Header) bool {
 	// If connectionstate exists and the replay protector allows, process packet
 	// Else, send recv errors for 300 seconds after a restart to allow fast reconnection.
-	if ci == nil || !ci.window.Check(header.MessageCounter) {
+	if ci == nil || !ci.window.Check(f.l, header.MessageCounter) {
 		f.sendRecvError(addr, header.RemoteIndex)
 		return false
 	}
@@ -166,8 +255,8 @@ func (f *Interface) decrypt(hostinfo *HostInfo, mc uint64, out []byte, packet []
 		return nil, err
 	}
 
-	if !hostinfo.ConnectionState.window.Update(mc) {
-		hostinfo.logger().WithField("header", header).
+	if !hostinfo.ConnectionState.window.Update(f.l, mc) {
+		hostinfo.logger(f.l).WithField("header", header).
 			Debugln("dropping out of window packet")
 		return nil, errors.New("out of window packet")
 	}
@@ -175,12 +264,12 @@ func (f *Interface) decrypt(hostinfo *HostInfo, mc uint64, out []byte, packet []
 	return out, nil
 }
 
-func (f *Interface) decryptTo(write func([]byte) error, hostinfo *HostInfo, messageCounter uint64, out []byte, packet []byte, fwPacket *FirewallPacket, nb []byte) {
+func (f *Interface) decryptToTun(hostinfo *HostInfo, messageCounter uint64, out []byte, packet []byte, fwPacket *FirewallPacket, nb []byte, q int, localCache ConntrackCache) {
 	var err error
 
 	out, err = hostinfo.ConnectionState.dKey.DecryptDanger(out, packet[:HeaderLen], packet[HeaderLen:], messageCounter, nb)
 	if err != nil {
-		hostinfo.logger().WithError(err).Error("Failed to decrypt packet")
+		hostinfo.logger(f.l).WithError(err).Error("Failed to decrypt packet")
 		//TODO: maybe after build 64 is out? 06/14/2018 - NB
 		//f.sendRecvError(hostinfo.remote, header.RemoteIndex)
 		return
@@ -188,21 +277,21 @@ func (f *Interface) decryptTo(write func([]byte) error, hostinfo *HostInfo, mess
 
 	err = newPacket(out, true, fwPacket)
 	if err != nil {
-		hostinfo.logger().WithError(err).WithField("packet", out).
+		hostinfo.logger(f.l).WithError(err).WithField("packet", out).
 			Warnf("Error while validating inbound packet")
 		return
 	}
 
-	if !hostinfo.ConnectionState.window.Update(messageCounter) {
-		hostinfo.logger().WithField("fwPacket", fwPacket).
+	if !hostinfo.ConnectionState.window.Update(f.l, messageCounter) {
+		hostinfo.logger(f.l).WithField("fwPacket", fwPacket).
 			Debugln("dropping out of window packet")
 		return
 	}
 
-	dropReason := f.firewall.Drop(out, *fwPacket, true, hostinfo, trustedCAs)
+	dropReason := f.firewall.Drop(out, *fwPacket, true, hostinfo, f.caPool, localCache)
 	if dropReason != nil {
-		if l.Level >= logrus.DebugLevel {
-			hostinfo.logger().WithField("fwPacket", fwPacket).
+		if f.l.Level >= logrus.DebugLevel {
+			hostinfo.logger(f.l).WithField("fwPacket", fwPacket).
 				WithField("reason", dropReason).
 				Debugln("dropping inbound packet")
 		}
@@ -210,9 +299,9 @@ func (f *Interface) decryptTo(write func([]byte) error, hostinfo *HostInfo, mess
 	}
 
 	f.connectionManager.In(hostinfo.hostId)
-	err = write(out)
+	_, err = f.readers[q].Write(out)
 	if err != nil {
-		l.WithError(err).Error("Failed to write to tun")
+		f.l.WithError(err).Error("Failed to write to tun")
 	}
 }
 
@@ -222,47 +311,47 @@ func (f *Interface) sendRecvError(endpoint *udpAddr, index uint32) {
 	//TODO: this should be a signed message so we can trust that we should drop the index
 	b := HeaderEncode(make([]byte, HeaderLen), Version, uint8(recvError), 0, index, 0)
 	f.outside.WriteTo(b, endpoint)
-	if l.Level >= logrus.DebugLevel {
-		l.WithField("index", index).
+	if f.l.Level >= logrus.DebugLevel {
+		f.l.WithField("index", index).
 			WithField("udpAddr", endpoint).
 			Debug("Recv error sent")
 	}
 }
 
 func (f *Interface) handleRecvError(addr *udpAddr, h *Header) {
-	// This flag is to stop caring about recv_error from old versions
-	// This should go away when the old version is gone from prod
-	if l.Level >= logrus.DebugLevel {
-		l.WithField("index", h.RemoteIndex).
+	if f.l.Level >= logrus.DebugLevel {
+		f.l.WithField("index", h.RemoteIndex).
 			WithField("udpAddr", addr).
 			Debug("Recv error received")
 	}
 
+	// First, clean up in the pending hostmap
+	f.handshakeManager.pendingHostMap.DeleteReverseIndex(h.RemoteIndex)
+
 	hostinfo, err := f.hostMap.QueryReverseIndex(h.RemoteIndex)
 	if err != nil {
-		l.Debugln(err, ": ", h.RemoteIndex)
+		f.l.Debugln(err, ": ", h.RemoteIndex)
 		return
 	}
 
+	hostinfo.Lock()
+	defer hostinfo.Unlock()
+
 	if !hostinfo.RecvErrorExceeded() {
 		return
 	}
-	if hostinfo.remote != nil && hostinfo.remote.String() != addr.String() {
-		l.Infoln("Someone spoofing recv_errors? ", addr, hostinfo.remote)
+	if hostinfo.remote != nil && hostinfo.remote.Equals(addr) {
+		f.l.Infoln("Someone spoofing recv_errors? ", addr, hostinfo.remote)
 		return
 	}
 
-	id := hostinfo.localIndexId
-	host := hostinfo.hostId
 	// We delete this host from the main hostmap
-	f.hostMap.DeleteIndex(id)
-	f.hostMap.DeleteVpnIP(host)
+	f.hostMap.DeleteHostInfo(hostinfo)
 	// We also delete it from pending to allow for
 	// fast reconnect. We must null the connectionstate
 	// or a counter reuse may happen
 	hostinfo.ConnectionState = nil
-	f.handshakeManager.DeleteIndex(id)
-	f.handshakeManager.DeleteVpnIP(host)
+	f.handshakeManager.DeleteHostInfo(hostinfo)
 }
 
 /*
@@ -287,7 +376,7 @@ func (f *Interface) sendMeta(ci *ConnectionState, endpoint *net.UDPAddr, meta *N
 }
 */
 
-func RecombineCertAndValidate(h *noise.HandshakeState, rawCertBytes []byte) (*cert.NebulaCertificate, error) {
+func RecombineCertAndValidate(h *noise.HandshakeState, rawCertBytes []byte, caPool *cert.NebulaCAPool) (*cert.NebulaCertificate, error) {
 	pk := h.PeerStatic()
 
 	if pk == nil {
@@ -316,7 +405,7 @@ func RecombineCertAndValidate(h *noise.HandshakeState, rawCertBytes []byte) (*ce
 	}
 
 	c, _ := cert.UnmarshalNebulaCertificate(recombined)
-	isValid, err := c.Verify(time.Now(), trustedCAs)
+	isValid, err := c.Verify(time.Now(), caPool)
 	if err != nil {
 		return c, fmt.Errorf("certificate validation failed: %s", err)
 	} else if !isValid {

punchy_test.go

@@ -8,7 +8,8 @@ import (
 )
 
 func TestNewPunchyFromConfig(t *testing.T) {
-	c := NewConfig()
+	l := NewTestLogger()
+	c := NewConfig(l)
 
 	// Test defaults
 	p := NewPunchyFromConfig(c)

remote_list.go

@@ -0,0 +1,504 @@
+package nebula
+
+import (
+	"bytes"
+	"net"
+	"sort"
+	"sync"
+)
+
+// forEachFunc is used to benefit folks that want to do work inside the lock
+type forEachFunc func(addr *udpAddr, preferred bool)
+
+// The checkFuncs here are to simplify bulk importing LH query response logic into a single function (reset slice and iterate)
+type checkFuncV4 func(to *Ip4AndPort) bool
+type checkFuncV6 func(to *Ip6AndPort) bool
+
+// CacheMap is a struct that better represents the lighthouse cache for humans
+// The string key is the owners vpnIp
+type CacheMap map[string]*Cache
+
+// Cache is the other part of CacheMap to better represent the lighthouse cache for humans
+// We don't reason about ipv4 vs ipv6 here
+type Cache struct {
+	Learned  []*udpAddr `json:"learned,omitempty"`
+	Reported []*udpAddr `json:"reported,omitempty"`
+}
+
+//TODO: Seems like we should plop static host entries in here too since the are protected by the lighthouse from deletion
+// We will never clean learned/reported information for them as it stands today
+
+// cache is an internal struct that splits v4 and v6 addresses inside the cache map
+type cache struct {
+	v4 *cacheV4
+	v6 *cacheV6
+}
+
+// cacheV4 stores learned and reported ipv4 records under cache
+type cacheV4 struct {
+	learned  *Ip4AndPort
+	reported []*Ip4AndPort
+}
+
+// cacheV4 stores learned and reported ipv6 records under cache
+type cacheV6 struct {
+	learned  *Ip6AndPort
+	reported []*Ip6AndPort
+}
+
+// RemoteList is a unifying concept for lighthouse servers and clients as well as hostinfos.
+// It serves as a local cache of query replies, host update notifications, and locally learned addresses
+type RemoteList struct {
+	// Every interaction with internals requires a lock!
+	sync.RWMutex
+
+	// A deduplicated set of addresses. Any accessor should lock beforehand.
+	addrs []*udpAddr
+
+	// These are maps to store v4 and v6 addresses per lighthouse
+	// Map key is the vpnIp of the person that told us about this the cached entries underneath.
+	// For learned addresses, this is the vpnIp that sent the packet
+	cache map[uint32]*cache
+
+	// This is a list of remotes that we have tried to handshake with and have returned from the wrong vpn ip.
+	// They should not be tried again during a handshake
+	badRemotes []*udpAddr
+
+	// A flag that the cache may have changed and addrs needs to be rebuilt
+	shouldRebuild bool
+}
+
+// NewRemoteList creates a new empty RemoteList
+func NewRemoteList() *RemoteList {
+	return &RemoteList{
+		addrs: make([]*udpAddr, 0),
+		cache: make(map[uint32]*cache),
+	}
+}
+
+// Len locks and reports the size of the deduplicated address list
+// The deduplication work may need to occur here, so you must pass preferredRanges
+func (r *RemoteList) Len(preferredRanges []*net.IPNet) int {
+	r.Rebuild(preferredRanges)
+	r.RLock()
+	defer r.RUnlock()
+	return len(r.addrs)
+}
+
+// ForEach locks and will call the forEachFunc for every deduplicated address in the list
+// The deduplication work may need to occur here, so you must pass preferredRanges
+func (r *RemoteList) ForEach(preferredRanges []*net.IPNet, forEach forEachFunc) {
+	r.Rebuild(preferredRanges)
+	r.RLock()
+	for _, v := range r.addrs {
+		forEach(v, isPreferred(v.IP, preferredRanges))
+	}
+	r.RUnlock()
+}
+
+// CopyAddrs locks and makes a deep copy of the deduplicated address list
+// The deduplication work may need to occur here, so you must pass preferredRanges
+func (r *RemoteList) CopyAddrs(preferredRanges []*net.IPNet) []*udpAddr {
+	if r == nil {
+		return nil
+	}
+
+	r.Rebuild(preferredRanges)
+
+	r.RLock()
+	defer r.RUnlock()
+	c := make([]*udpAddr, len(r.addrs))
+	for i, v := range r.addrs {
+		c[i] = v.Copy()
+	}
+	return c
+}
+
+// LearnRemote locks and sets the learned slot for the owner vpn ip to the provided addr
+// Currently this is only needed when HostInfo.SetRemote is called as that should cover both handshaking and roaming.
+// It will mark the deduplicated address list as dirty, so do not call it unless new information is available
+//TODO: this needs to support the allow list list
+func (r *RemoteList) LearnRemote(ownerVpnIp uint32, addr *udpAddr) {
+	r.Lock()
+	defer r.Unlock()
+	if v4 := addr.IP.To4(); v4 != nil {
+		r.unlockedSetLearnedV4(ownerVpnIp, NewIp4AndPort(v4, uint32(addr.Port)))
+	} else {
+		r.unlockedSetLearnedV6(ownerVpnIp, NewIp6AndPort(addr.IP, uint32(addr.Port)))
+	}
+}
+
+// CopyCache locks and creates a more human friendly form of the internal address cache.
+// This may contain duplicates and blocked addresses
+func (r *RemoteList) CopyCache() *CacheMap {
+	r.RLock()
+	defer r.RUnlock()
+
+	cm := make(CacheMap)
+	getOrMake := func(vpnIp string) *Cache {
+		c := cm[vpnIp]
+		if c == nil {
+			c = &Cache{
+				Learned:  make([]*udpAddr, 0),
+				Reported: make([]*udpAddr, 0),
+			}
+			cm[vpnIp] = c
+		}
+		return c
+	}
+
+	for owner, mc := range r.cache {
+		c := getOrMake(IntIp(owner).String())
+
+		if mc.v4 != nil {
+			if mc.v4.learned != nil {
+				c.Learned = append(c.Learned, NewUDPAddrFromLH4(mc.v4.learned))
+			}
+
+			for _, a := range mc.v4.reported {
+				c.Reported = append(c.Reported, NewUDPAddrFromLH4(a))
+			}
+		}
+
+		if mc.v6 != nil {
+			if mc.v6.learned != nil {
+				c.Learned = append(c.Learned, NewUDPAddrFromLH6(mc.v6.learned))
+			}
+
+			for _, a := range mc.v6.reported {
+				c.Reported = append(c.Reported, NewUDPAddrFromLH6(a))
+			}
+		}
+	}
+
+	return &cm
+}
+
+// BlockRemote locks and records the address as bad, it will be excluded from the deduplicated address list
+func (r *RemoteList) BlockRemote(bad *udpAddr) {
+	r.Lock()
+	defer r.Unlock()
+
+	// Check if we already blocked this addr
+	if r.unlockedIsBad(bad) {
+		return
+	}
+
+	// We copy here because we are taking something else's memory and we can't trust everything
+	r.badRemotes = append(r.badRemotes, bad.Copy())
+
+	// Mark the next interaction must recollect/dedupe
+	r.shouldRebuild = true
+}
+
+// CopyBlockedRemotes locks and makes a deep copy of the blocked remotes list
+func (r *RemoteList) CopyBlockedRemotes() []*udpAddr {
+	r.RLock()
+	defer r.RUnlock()
+
+	c := make([]*udpAddr, len(r.badRemotes))
+	for i, v := range r.badRemotes {
+		c[i] = v.Copy()
+	}
+	return c
+}
+
+// ResetBlockedRemotes locks and clears the blocked remotes list
+func (r *RemoteList) ResetBlockedRemotes() {
+	r.Lock()
+	r.badRemotes = nil
+	r.Unlock()
+}
+
+// Rebuild locks and generates the deduplicated address list only if there is work to be done
+// There is generally no reason to call this directly but it is safe to do so
+func (r *RemoteList) Rebuild(preferredRanges []*net.IPNet) {
+	r.Lock()
+	defer r.Unlock()
+
+	// Only rebuild if the cache changed
+	//TODO: shouldRebuild is probably pointless as we don't check for actual change when lighthouse updates come in
+	if r.shouldRebuild {
+		r.unlockedCollect()
+		r.shouldRebuild = false
+	}
+
+	// Always re-sort, preferredRanges can change via HUP
+	r.unlockedSort(preferredRanges)
+}
+
+// unlockedIsBad assumes you have the write lock and checks if the remote matches any entry in the blocked address list
+func (r *RemoteList) unlockedIsBad(remote *udpAddr) bool {
+	for _, v := range r.badRemotes {
+		if v.Equals(remote) {
+			return true
+		}
+	}
+	return false
+}
+
+// unlockedSetLearnedV4 assumes you have the write lock and sets the current learned address for this owner and marks the
+// deduplicated address list as dirty
+func (r *RemoteList) unlockedSetLearnedV4(ownerVpnIp uint32, to *Ip4AndPort) {
+	r.shouldRebuild = true
+	r.unlockedGetOrMakeV4(ownerVpnIp).learned = to
+}
+
+// unlockedSetV4 assumes you have the write lock and resets the reported list of ips for this owner to the list provided
+// and marks the deduplicated address list as dirty
+func (r *RemoteList) unlockedSetV4(ownerVpnIp uint32, to []*Ip4AndPort, check checkFuncV4) {
+	r.shouldRebuild = true
+	c := r.unlockedGetOrMakeV4(ownerVpnIp)
+
+	// Reset the slice
+	c.reported = c.reported[:0]
+
+	// We can't take their array but we can take their pointers
+	for _, v := range to[:minInt(len(to), MaxRemotes)] {
+		if check(v) {
+			c.reported = append(c.reported, v)
+		}
+	}
+}
+
+// unlockedPrependV4 assumes you have the write lock and prepends the address in the reported list for this owner
+// This is only useful for establishing static hosts
+func (r *RemoteList) unlockedPrependV4(ownerVpnIp uint32, to *Ip4AndPort) {
+	r.shouldRebuild = true
+	c := r.unlockedGetOrMakeV4(ownerVpnIp)
+
+	// We are doing the easy append because this is rarely called
+	c.reported = append([]*Ip4AndPort{to}, c.reported...)
+	if len(c.reported) > MaxRemotes {
+		c.reported = c.reported[:MaxRemotes]
+	}
+}
+
+// unlockedSetLearnedV6 assumes you have the write lock and sets the current learned address for this owner and marks the
+// deduplicated address list as dirty
+func (r *RemoteList) unlockedSetLearnedV6(ownerVpnIp uint32, to *Ip6AndPort) {
+	r.shouldRebuild = true
+	r.unlockedGetOrMakeV6(ownerVpnIp).learned = to
+}
+
+// unlockedSetV6 assumes you have the write lock and resets the reported list of ips for this owner to the list provided
+// and marks the deduplicated address list as dirty
+func (r *RemoteList) unlockedSetV6(ownerVpnIp uint32, to []*Ip6AndPort, check checkFuncV6) {
+	r.shouldRebuild = true
+	c := r.unlockedGetOrMakeV6(ownerVpnIp)
+
+	// Reset the slice
+	c.reported = c.reported[:0]
+
+	// We can't take their array but we can take their pointers
+	for _, v := range to[:minInt(len(to), MaxRemotes)] {
+		if check(v) {
+			c.reported = append(c.reported, v)
+		}
+	}
+}
+
+// unlockedPrependV6 assumes you have the write lock and prepends the address in the reported list for this owner
+// This is only useful for establishing static hosts
+func (r *RemoteList) unlockedPrependV6(ownerVpnIp uint32, to *Ip6AndPort) {
+	r.shouldRebuild = true
+	c := r.unlockedGetOrMakeV6(ownerVpnIp)
+
+	// We are doing the easy append because this is rarely called
+	c.reported = append([]*Ip6AndPort{to}, c.reported...)
+	if len(c.reported) > MaxRemotes {
+		c.reported = c.reported[:MaxRemotes]
+	}
+}
+
+// unlockedGetOrMakeV4 assumes you have the write lock and builds the cache and owner entry. Only the v4 pointer is established.
+// The caller must dirty the learned address cache if required
+func (r *RemoteList) unlockedGetOrMakeV4(ownerVpnIp uint32) *cacheV4 {
+	am := r.cache[ownerVpnIp]
+	if am == nil {
+		am = &cache{}
+		r.cache[ownerVpnIp] = am
+	}
+	// Avoid occupying memory for v6 addresses if we never have any
+	if am.v4 == nil {
+		am.v4 = &cacheV4{}
+	}
+	return am.v4
+}
+
+// unlockedGetOrMakeV6 assumes you have the write lock and builds the cache and owner entry. Only the v6 pointer is established.
+// The caller must dirty the learned address cache if required
+func (r *RemoteList) unlockedGetOrMakeV6(ownerVpnIp uint32) *cacheV6 {
+	am := r.cache[ownerVpnIp]
+	if am == nil {
+		am = &cache{}
+		r.cache[ownerVpnIp] = am
+	}
+	// Avoid occupying memory for v4 addresses if we never have any
+	if am.v6 == nil {
+		am.v6 = &cacheV6{}
+	}
+	return am.v6
+}
+
+// unlockedCollect assumes you have the write lock and collects/transforms the cache into the deduped address list.
+// The result of this function can contain duplicates. unlockedSort handles cleaning it.
+func (r *RemoteList) unlockedCollect() {
+	addrs := r.addrs[:0]
+
+	for _, c := range r.cache {
+		if c.v4 != nil {
+			if c.v4.learned != nil {
+				u := NewUDPAddrFromLH4(c.v4.learned)
+				if !r.unlockedIsBad(u) {
+					addrs = append(addrs, u)
+				}
+			}
+
+			for _, v := range c.v4.reported {
+				u := NewUDPAddrFromLH4(v)
+				if !r.unlockedIsBad(u) {
+					addrs = append(addrs, u)
+				}
+			}
+		}
+
+		if c.v6 != nil {
+			if c.v6.learned != nil {
+				u := NewUDPAddrFromLH6(c.v6.learned)
+				if !r.unlockedIsBad(u) {
+					addrs = append(addrs, u)
+				}
+			}
+
+			for _, v := range c.v6.reported {
+				u := NewUDPAddrFromLH6(v)
+				if !r.unlockedIsBad(u) {
+					addrs = append(addrs, u)
+				}
+			}
+		}
+	}
+
+	r.addrs = addrs
+}
+
+// unlockedSort assumes you have the write lock and performs the deduping and sorting of the address list
+func (r *RemoteList) unlockedSort(preferredRanges []*net.IPNet) {
+	n := len(r.addrs)
+	if n < 2 {
+		return
+	}
+
+	lessFunc := func(i, j int) bool {
+		a := r.addrs[i]
+		b := r.addrs[j]
+		// Preferred addresses first
+
+		aPref := isPreferred(a.IP, preferredRanges)
+		bPref := isPreferred(b.IP, preferredRanges)
+		switch {
+		case aPref && !bPref:
+			// If i is preferred and j is not, i is less than j
+			return true
+
+		case !aPref && bPref:
+			// If j is preferred then i is not due to the else, i is not less than j
+			return false
+
+		default:
+			// Both i an j are either preferred or not, sort within that
+		}
+
+		// ipv6 addresses 2nd
+		a4 := a.IP.To4()
+		b4 := b.IP.To4()
+		switch {
+		case a4 == nil && b4 != nil:
+			// If i is v6 and j is v4, i is less than j
+			return true
+
+		case a4 != nil && b4 == nil:
+			// If j is v6 and i is v4, i is not less than j
+			return false
+
+		case a4 != nil && b4 != nil:
+			// Special case for ipv4, a4 and b4 are not nil
+			aPrivate := isPrivateIP(a4)
+			bPrivate := isPrivateIP(b4)
+			switch {
+			case !aPrivate && bPrivate:
+				// If i is a public ip (not private) and j is a private ip, i is less then j
+				return true
+
+			case aPrivate && !bPrivate:
+				// If j is public (not private) then i is private due to the else, i is not less than j
+				return false
+
+			default:
+				// Both i an j are either public or private, sort within that
+			}
+
+		default:
+			// Both i an j are either ipv4 or ipv6, sort within that
+		}
+
+		// lexical order of ips 3rd
+		c := bytes.Compare(a.IP, b.IP)
+		if c == 0 {
+			// Ips are the same, Lexical order of ports 4th
+			return a.Port < b.Port
+		}
+
+		// Ip wasn't the same
+		return c < 0
+	}
+
+	// Sort it
+	sort.Slice(r.addrs, lessFunc)
+
+	// Deduplicate
+	a, b := 0, 1
+	for b < n {
+		if !r.addrs[a].Equals(r.addrs[b]) {
+			a++
+			if a != b {
+				r.addrs[a], r.addrs[b] = r.addrs[b], r.addrs[a]
+			}
+		}
+		b++
+	}
+
+	r.addrs = r.addrs[:a+1]
+	return
+}
+
+// minInt returns the minimum integer of a or b
+func minInt(a, b int) int {
+	if a < b {
+		return a
+	}
+	return b
+}
+
+// isPreferred returns true of the ip is contained in the preferredRanges list
+func isPreferred(ip net.IP, preferredRanges []*net.IPNet) bool {
+	//TODO: this would be better in a CIDR6Tree
+	for _, p := range preferredRanges {
+		if p.Contains(ip) {
+			return true
+		}
+	}
+	return false
+}
+
+var _, private24BitBlock, _ = net.ParseCIDR("10.0.0.0/8")
+var _, private20BitBlock, _ = net.ParseCIDR("172.16.0.0/12")
+var _, private16BitBlock, _ = net.ParseCIDR("192.168.0.0/16")
+
+// isPrivateIP returns true if the ip is contained by a rfc 1918 private range
+func isPrivateIP(ip net.IP) bool {
+	//TODO: another great cidrtree option
+	//TODO: Private for ipv6 or just let it ride?
+	return private24BitBlock.Contains(ip) || private20BitBlock.Contains(ip) || private16BitBlock.Contains(ip)
+}

remote_list_test.go

@@ -0,0 +1,228 @@
+package nebula
+
+import (
+	"net"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestRemoteList_Rebuild(t *testing.T) {
+	rl := NewRemoteList()
+	rl.unlockedSetV4(
+		0,
+		[]*Ip4AndPort{
+			{Ip: ip2int(net.ParseIP("70.199.182.92")), Port: 1475}, // this is duped
+			{Ip: ip2int(net.ParseIP("172.17.0.182")), Port: 10101},
+			{Ip: ip2int(net.ParseIP("172.17.1.1")), Port: 10101}, // this is duped
+			{Ip: ip2int(net.ParseIP("172.18.0.1")), Port: 10101}, // this is duped
+			{Ip: ip2int(net.ParseIP("172.18.0.1")), Port: 10101}, // this is a dupe
+			{Ip: ip2int(net.ParseIP("172.19.0.1")), Port: 10101},
+			{Ip: ip2int(net.ParseIP("172.31.0.1")), Port: 10101},
+			{Ip: ip2int(net.ParseIP("172.17.1.1")), Port: 10101},   // this is a dupe
+			{Ip: ip2int(net.ParseIP("70.199.182.92")), Port: 1476}, // almost dupe of 0 with a diff port
+			{Ip: ip2int(net.ParseIP("70.199.182.92")), Port: 1475}, // this is a dupe
+		},
+		func(*Ip4AndPort) bool { return true },
+	)
+
+	rl.unlockedSetV6(
+		1,
+		[]*Ip6AndPort{
+			NewIp6AndPort(net.ParseIP("1::1"), 1), // this is duped
+			NewIp6AndPort(net.ParseIP("1::1"), 2), // almost dupe of 0 with a diff port, also gets duped
+			NewIp6AndPort(net.ParseIP("1:100::1"), 1),
+			NewIp6AndPort(net.ParseIP("1::1"), 1), // this is a dupe
+			NewIp6AndPort(net.ParseIP("1::1"), 2), // this is a dupe
+		},
+		func(*Ip6AndPort) bool { return true },
+	)
+
+	rl.Rebuild([]*net.IPNet{})
+	assert.Len(t, rl.addrs, 10, "addrs contains too many entries")
+
+	// ipv6 first, sorted lexically within
+	assert.Equal(t, "[1::1]:1", rl.addrs[0].String())
+	assert.Equal(t, "[1::1]:2", rl.addrs[1].String())
+	assert.Equal(t, "[1:100::1]:1", rl.addrs[2].String())
+
+	// ipv4 last, sorted by public first, then private, lexically within them
+	assert.Equal(t, "70.199.182.92:1475", rl.addrs[3].String())
+	assert.Equal(t, "70.199.182.92:1476", rl.addrs[4].String())
+	assert.Equal(t, "172.17.0.182:10101", rl.addrs[5].String())
+	assert.Equal(t, "172.17.1.1:10101", rl.addrs[6].String())
+	assert.Equal(t, "172.18.0.1:10101", rl.addrs[7].String())
+	assert.Equal(t, "172.19.0.1:10101", rl.addrs[8].String())
+	assert.Equal(t, "172.31.0.1:10101", rl.addrs[9].String())
+
+	// Now ensure we can hoist ipv4 up
+	_, ipNet, err := net.ParseCIDR("0.0.0.0/0")
+	assert.NoError(t, err)
+	rl.Rebuild([]*net.IPNet{ipNet})
+	assert.Len(t, rl.addrs, 10, "addrs contains too many entries")
+
+	// ipv4 first, public then private, lexically within them
+	assert.Equal(t, "70.199.182.92:1475", rl.addrs[0].String())
+	assert.Equal(t, "70.199.182.92:1476", rl.addrs[1].String())
+	assert.Equal(t, "172.17.0.182:10101", rl.addrs[2].String())
+	assert.Equal(t, "172.17.1.1:10101", rl.addrs[3].String())
+	assert.Equal(t, "172.18.0.1:10101", rl.addrs[4].String())
+	assert.Equal(t, "172.19.0.1:10101", rl.addrs[5].String())
+	assert.Equal(t, "172.31.0.1:10101", rl.addrs[6].String())
+
+	// ipv6 last, sorted by public first, then private, lexically within them
+	assert.Equal(t, "[1::1]:1", rl.addrs[7].String())
+	assert.Equal(t, "[1::1]:2", rl.addrs[8].String())
+	assert.Equal(t, "[1:100::1]:1", rl.addrs[9].String())
+
+	// Ensure we can hoist a specific ipv4 range over anything else
+	_, ipNet, err = net.ParseCIDR("172.17.0.0/16")
+	assert.NoError(t, err)
+	rl.Rebuild([]*net.IPNet{ipNet})
+	assert.Len(t, rl.addrs, 10, "addrs contains too many entries")
+
+	// Preferred ipv4 first
+	assert.Equal(t, "172.17.0.182:10101", rl.addrs[0].String())
+	assert.Equal(t, "172.17.1.1:10101", rl.addrs[1].String())
+
+	// ipv6 next
+	assert.Equal(t, "[1::1]:1", rl.addrs[2].String())
+	assert.Equal(t, "[1::1]:2", rl.addrs[3].String())
+	assert.Equal(t, "[1:100::1]:1", rl.addrs[4].String())
+
+	// the remaining ipv4 last
+	assert.Equal(t, "70.199.182.92:1475", rl.addrs[5].String())
+	assert.Equal(t, "70.199.182.92:1476", rl.addrs[6].String())
+	assert.Equal(t, "172.18.0.1:10101", rl.addrs[7].String())
+	assert.Equal(t, "172.19.0.1:10101", rl.addrs[8].String())
+	assert.Equal(t, "172.31.0.1:10101", rl.addrs[9].String())
+}
+
+func BenchmarkFullRebuild(b *testing.B) {
+	rl := NewRemoteList()
+	rl.unlockedSetV4(
+		0,
+		[]*Ip4AndPort{
+			{Ip: ip2int(net.ParseIP("70.199.182.92")), Port: 1475},
+			{Ip: ip2int(net.ParseIP("172.17.0.182")), Port: 10101},
+			{Ip: ip2int(net.ParseIP("172.17.1.1")), Port: 10101},
+			{Ip: ip2int(net.ParseIP("172.18.0.1")), Port: 10101},
+			{Ip: ip2int(net.ParseIP("172.19.0.1")), Port: 10101},
+			{Ip: ip2int(net.ParseIP("172.31.0.1")), Port: 10101},
+			{Ip: ip2int(net.ParseIP("172.17.1.1")), Port: 10101},   // this is a dupe
+			{Ip: ip2int(net.ParseIP("70.199.182.92")), Port: 1476}, // dupe of 0 with a diff port
+		},
+		func(*Ip4AndPort) bool { return true },
+	)
+
+	rl.unlockedSetV6(
+		0,
+		[]*Ip6AndPort{
+			NewIp6AndPort(net.ParseIP("1::1"), 1),
+			NewIp6AndPort(net.ParseIP("1::1"), 2), // dupe of 0 with a diff port
+			NewIp6AndPort(net.ParseIP("1:100::1"), 1),
+			NewIp6AndPort(net.ParseIP("1::1"), 1), // this is a dupe
+		},
+		func(*Ip6AndPort) bool { return true },
+	)
+
+	b.Run("no preferred", func(b *testing.B) {
+		for i := 0; i < b.N; i++ {
+			rl.shouldRebuild = true
+			rl.Rebuild([]*net.IPNet{})
+		}
+	})
+
+	_, ipNet, err := net.ParseCIDR("172.17.0.0/16")
+	assert.NoError(b, err)
+	b.Run("1 preferred", func(b *testing.B) {
+		for i := 0; i < b.N; i++ {
+			rl.shouldRebuild = true
+			rl.Rebuild([]*net.IPNet{ipNet})
+		}
+	})
+
+	_, ipNet2, err := net.ParseCIDR("70.0.0.0/8")
+	assert.NoError(b, err)
+	b.Run("2 preferred", func(b *testing.B) {
+		for i := 0; i < b.N; i++ {
+			rl.shouldRebuild = true
+			rl.Rebuild([]*net.IPNet{ipNet, ipNet2})
+		}
+	})
+
+	_, ipNet3, err := net.ParseCIDR("0.0.0.0/0")
+	assert.NoError(b, err)
+	b.Run("3 preferred", func(b *testing.B) {
+		for i := 0; i < b.N; i++ {
+			rl.shouldRebuild = true
+			rl.Rebuild([]*net.IPNet{ipNet, ipNet2, ipNet3})
+		}
+	})
+}
+
+func BenchmarkSortRebuild(b *testing.B) {
+	rl := NewRemoteList()
+	rl.unlockedSetV4(
+		0,
+		[]*Ip4AndPort{
+			{Ip: ip2int(net.ParseIP("70.199.182.92")), Port: 1475},
+			{Ip: ip2int(net.ParseIP("172.17.0.182")), Port: 10101},
+			{Ip: ip2int(net.ParseIP("172.17.1.1")), Port: 10101},
+			{Ip: ip2int(net.ParseIP("172.18.0.1")), Port: 10101},
+			{Ip: ip2int(net.ParseIP("172.19.0.1")), Port: 10101},
+			{Ip: ip2int(net.ParseIP("172.31.0.1")), Port: 10101},
+			{Ip: ip2int(net.ParseIP("172.17.1.1")), Port: 10101},   // this is a dupe
+			{Ip: ip2int(net.ParseIP("70.199.182.92")), Port: 1476}, // dupe of 0 with a diff port
+		},
+		func(*Ip4AndPort) bool { return true },
+	)
+
+	rl.unlockedSetV6(
+		0,
+		[]*Ip6AndPort{
+			NewIp6AndPort(net.ParseIP("1::1"), 1),
+			NewIp6AndPort(net.ParseIP("1::1"), 2), // dupe of 0 with a diff port
+			NewIp6AndPort(net.ParseIP("1:100::1"), 1),
+			NewIp6AndPort(net.ParseIP("1::1"), 1), // this is a dupe
+		},
+		func(*Ip6AndPort) bool { return true },
+	)
+
+	b.Run("no preferred", func(b *testing.B) {
+		for i := 0; i < b.N; i++ {
+			rl.shouldRebuild = true
+			rl.Rebuild([]*net.IPNet{})
+		}
+	})
+
+	_, ipNet, err := net.ParseCIDR("172.17.0.0/16")
+	rl.Rebuild([]*net.IPNet{ipNet})
+
+	assert.NoError(b, err)
+	b.Run("1 preferred", func(b *testing.B) {
+		for i := 0; i < b.N; i++ {
+			rl.Rebuild([]*net.IPNet{ipNet})
+		}
+	})
+
+	_, ipNet2, err := net.ParseCIDR("70.0.0.0/8")
+	rl.Rebuild([]*net.IPNet{ipNet, ipNet2})
+
+	assert.NoError(b, err)
+	b.Run("2 preferred", func(b *testing.B) {
+		for i := 0; i < b.N; i++ {
+			rl.Rebuild([]*net.IPNet{ipNet, ipNet2})
+		}
+	})
+
+	_, ipNet3, err := net.ParseCIDR("0.0.0.0/0")
+	rl.Rebuild([]*net.IPNet{ipNet, ipNet2, ipNet3})
+
+	assert.NoError(b, err)
+	b.Run("3 preferred", func(b *testing.B) {
+		for i := 0; i < b.N; i++ {
+			rl.Rebuild([]*net.IPNet{ipNet, ipNet2, ipNet3})
+		}
+	})
+}

ssh.go

@@ -10,6 +10,7 @@ import (
 	"os"
 	"reflect"
 	"runtime/pprof"
+	"sort"
 	"strings"
 	"syscall"
 
@@ -43,51 +44,58 @@ type sshCreateTunnelFlags struct {
 	Address string
 }
 
-func wireSSHReload(ssh *sshd.SSHServer, c *Config) {
+func wireSSHReload(l *logrus.Logger, ssh *sshd.SSHServer, c *Config) {
 	c.RegisterReloadCallback(func(c *Config) {
 		if c.GetBool("sshd.enabled", false) {
-			err := configSSH(ssh, c)
+			sshRun, err := configSSH(l, ssh, c)
 			if err != nil {
 				l.WithError(err).Error("Failed to reconfigure the sshd")
 				ssh.Stop()
 			}
+			if sshRun != nil {
+				go sshRun()
+			}
 		} else {
 			ssh.Stop()
 		}
 	})
 }
 
-func configSSH(ssh *sshd.SSHServer, c *Config) error {
+// configSSH reads the ssh info out of the passed-in Config and
+// updates the passed-in SSHServer. On success, it returns a function
+// that callers may invoke to run the configured ssh server. On
+// failure, it returns nil, error.
+func configSSH(l *logrus.Logger, ssh *sshd.SSHServer, c *Config) (func(), error) {
 	//TODO conntrack list
 	//TODO print firewall rules or hash?
 
 	listen := c.GetString("sshd.listen", "")
 	if listen == "" {
-		return fmt.Errorf("sshd.listen must be provided")
+		return nil, fmt.Errorf("sshd.listen must be provided")
 	}
 
 	_, port, err := net.SplitHostPort(listen)
 	if err != nil {
-		return fmt.Errorf("invalid sshd.listen address: %s", err)
+		return nil, fmt.Errorf("invalid sshd.listen address: %s", err)
 	}
 	if port == "22" {
-		return fmt.Errorf("sshd.listen can not use port 22")
+		return nil, fmt.Errorf("sshd.listen can not use port 22")
 	}
 
 	//TODO: no good way to reload this right now
 	hostKeyFile := c.GetString("sshd.host_key", "")
 	if hostKeyFile == "" {
-		return fmt.Errorf("sshd.host_key must be provided")
+		return nil, fmt.Errorf("sshd.host_key must be provided")
 	}
 
 	hostKeyBytes, err := ioutil.ReadFile(hostKeyFile)
 	if err != nil {
-		return fmt.Errorf("error while loading sshd.host_key file: %s", err)
+		return nil, fmt.Errorf("error while loading sshd.host_key file: %s", err)
 	}
 
 	err = ssh.SetHostKey(hostKeyBytes)
 	if err != nil {
-		return fmt.Errorf("error while adding sshd.host_key: %s", err)
+		return nil, fmt.Errorf("error while adding sshd.host_key: %s", err)
 	}
 
 	rawKeys := c.Get("sshd.authorized_users")
@@ -138,17 +146,22 @@ func configSSH(ssh *sshd.SSHServer, c *Config) error {
 		l.Info("no ssh users to authorize")
 	}
 
+	var runner func()
 	if c.GetBool("sshd.enabled", false) {
 		ssh.Stop()
-		go ssh.Run(listen)
+		runner = func() {
+			if err := ssh.Run(listen); err != nil {
+				l.WithField("err", err).Warn("Failed to run the SSH server")
+			}
+		}
 	} else {
 		ssh.Stop()
 	}
 
-	return nil
+	return runner, nil
 }
 
-func attachCommands(ssh *sshd.SSHServer, hostMap *HostMap, pendingHostMap *HostMap, lightHouse *LightHouse, ifce *Interface) {
+func attachCommands(l *logrus.Logger, ssh *sshd.SSHServer, hostMap *HostMap, pendingHostMap *HostMap, lightHouse *LightHouse, ifce *Interface) {
 	ssh.RegisterCommand(&sshd.Command{
 		Name:             "list-hostmap",
 		ShortDescription: "List all known previously connected hosts",
@@ -224,13 +237,17 @@ func attachCommands(ssh *sshd.SSHServer, hostMap *HostMap, pendingHostMap *HostM
 	ssh.RegisterCommand(&sshd.Command{
 		Name:             "log-level",
 		ShortDescription: "Gets or sets the current log level",
-		Callback:         sshLogLevel,
+		Callback: func(fs interface{}, a []string, w sshd.StringWriter) error {
+			return sshLogLevel(l, fs, a, w)
+		},
 	})
 
 	ssh.RegisterCommand(&sshd.Command{
 		Name:             "log-format",
 		ShortDescription: "Gets or sets the current log format",
-		Callback:         sshLogFormat,
+		Callback: func(fs interface{}, a []string, w sshd.StringWriter) error {
+			return sshLogFormat(l, fs, a, w)
+		},
 	})
 
 	ssh.RegisterCommand(&sshd.Command{
@@ -330,8 +347,10 @@ func sshListHostMap(hostMap *HostMap, a interface{}, w sshd.StringWriter) error
 		return nil
 	}
 
-	hostMap.RLock()
-	defer hostMap.RUnlock()
+	hm := listHostMap(hostMap)
+	sort.Slice(hm, func(i, j int) bool {
+		return bytes.Compare(hm[i].VpnIP, hm[j].VpnIP) < 0
+	})
 
 	if fs.Json || fs.Pretty {
 		js := json.NewEncoder(w.GetWriter())
@@ -339,35 +358,15 @@ func sshListHostMap(hostMap *HostMap, a interface{}, w sshd.StringWriter) error
 			js.SetIndent("", "    ")
 		}
 
-		d := make([]m, len(hostMap.Hosts))
-		x := 0
-		var h m
-		for _, v := range hostMap.Hosts {
-			h = m{
-				"vpnIp":         int2ip(v.hostId),
-				"localIndex":    v.localIndexId,
-				"remoteIndex":   v.remoteIndexId,
-				"remoteAddrs":   v.RemoteUDPAddrs(),
-				"cachedPackets": len(v.packetStore),
-				"cert":          v.GetCert(),
-			}
-
-			if v.ConnectionState != nil {
-				h["messageCounter"] = v.ConnectionState.messageCounter
-			}
-
-			d[x] = h
-			x++
-		}
-
-		err := js.Encode(d)
+		err := js.Encode(hm)
 		if err != nil {
 			//TODO
 			return nil
 		}
+
 	} else {
-		for i, v := range hostMap.Hosts {
-			err := w.WriteLine(fmt.Sprintf("%s: %s", int2ip(i), v.RemoteUDPAddrs()))
+		for _, v := range hm {
+			err := w.WriteLine(fmt.Sprintf("%s: %s", v.VpnIP, v.RemoteAddrs))
 			if err != nil {
 				return err
 			}
@@ -384,8 +383,26 @@ func sshListLighthouseMap(lightHouse *LightHouse, a interface{}, w sshd.StringWr
 		return nil
 	}
 
+	type lighthouseInfo struct {
+		VpnIP net.IP    `json:"vpnIp"`
+		Addrs *CacheMap `json:"addrs"`
+	}
+
 	lightHouse.RLock()
-	defer lightHouse.RUnlock()
+	addrMap := make([]lighthouseInfo, len(lightHouse.addrMap))
+	x := 0
+	for k, v := range lightHouse.addrMap {
+		addrMap[x] = lighthouseInfo{
+			VpnIP: int2ip(k),
+			Addrs: v.CopyCache(),
+		}
+		x++
+	}
+	lightHouse.RUnlock()
+
+	sort.Slice(addrMap, func(i, j int) bool {
+		return bytes.Compare(addrMap[i].VpnIP, addrMap[j].VpnIP) < 0
+	})
 
 	if fs.Json || fs.Pretty {
 		js := json.NewEncoder(w.GetWriter())
@@ -393,36 +410,19 @@ func sshListLighthouseMap(lightHouse *LightHouse, a interface{}, w sshd.StringWr
 			js.SetIndent("", "    ")
 		}
 
-		d := make([]m, len(lightHouse.addrMap))
-		x := 0
-		var h m
-		for vpnIp, v := range lightHouse.addrMap {
-			ips := make([]string, len(v))
-			for i, ip := range v {
-				ips[i] = ip.String()
-			}
-
-			h = m{
-				"vpnIp": int2ip(vpnIp),
-				"addrs": ips,
-			}
-
-			d[x] = h
-			x++
-		}
-
-		err := js.Encode(d)
+		err := js.Encode(addrMap)
 		if err != nil {
 			//TODO
 			return nil
 		}
+
 	} else {
-		for vpnIp, v := range lightHouse.addrMap {
-			ips := make([]string, len(v))
-			for i, ip := range v {
-				ips[i] = ip.String()
+		for _, v := range addrMap {
+			b, err := json.Marshal(v.Addrs)
+			if err != nil {
+				return err
 			}
-			err := w.WriteLine(fmt.Sprintf("%s: %s", int2ip(vpnIp), ips))
+			err = w.WriteLine(fmt.Sprintf("%s: %s", v.VpnIP, string(b)))
 			if err != nil {
 				return err
 			}
@@ -473,8 +473,12 @@ func sshQueryLighthouse(ifce *Interface, fs interface{}, a []string, w sshd.Stri
 		return w.WriteLine(fmt.Sprintf("The provided vpn ip could not be parsed: %s", a[0]))
 	}
 
-	ips, _ := ifce.lightHouse.Query(vpnIp, ifce)
-	return json.NewEncoder(w.GetWriter()).Encode(ips)
+	var cm *CacheMap
+	rl := ifce.lightHouse.Query(vpnIp, ifce)
+	if rl != nil {
+		cm = rl.CopyCache()
+	}
+	return json.NewEncoder(w.GetWriter()).Encode(cm)
 }
 
 func sshCloseTunnel(ifce *Interface, fs interface{}, a []string, w sshd.StringWriter) error {
@@ -516,7 +520,7 @@ func sshCloseTunnel(ifce *Interface, fs interface{}, a []string, w sshd.StringWr
 		)
 	}
 
-	ifce.closeTunnel(hostInfo)
+	ifce.closeTunnel(hostInfo, false)
 	return w.WriteLine("Closed")
 }
 
@@ -561,7 +565,7 @@ func sshCreateTunnel(ifce *Interface, fs interface{}, a []string, w sshd.StringW
 
 	hostInfo = ifce.handshakeManager.AddVpnIP(vpnIp)
 	if addr != nil {
-		hostInfo.SetRemote(*addr)
+		hostInfo.SetRemote(addr)
 	}
 	ifce.getOrHandshake(vpnIp)
 
@@ -603,7 +607,7 @@ func sshChangeRemote(ifce *Interface, fs interface{}, a []string, w sshd.StringW
 		return w.WriteLine(fmt.Sprintf("Could not find tunnel for vpn ip: %v", a[0]))
 	}
 
-	hostInfo.SetRemote(*addr)
+	hostInfo.SetRemote(addr)
 	return w.WriteLine("Changed")
 }
 
@@ -628,7 +632,7 @@ func sshGetHeapProfile(fs interface{}, a []string, w sshd.StringWriter) error {
 	return err
 }
 
-func sshLogLevel(fs interface{}, a []string, w sshd.StringWriter) error {
+func sshLogLevel(l *logrus.Logger, fs interface{}, a []string, w sshd.StringWriter) error {
 	if len(a) == 0 {
 		return w.WriteLine(fmt.Sprintf("Log level is: %s", l.Level))
 	}
@@ -642,7 +646,7 @@ func sshLogLevel(fs interface{}, a []string, w sshd.StringWriter) error {
 	return w.WriteLine(fmt.Sprintf("Log level is: %s", l.Level))
 }
 
-func sshLogFormat(fs interface{}, a []string, w sshd.StringWriter) error {
+func sshLogFormat(l *logrus.Logger, fs interface{}, a []string, w sshd.StringWriter) error {
 	if len(a) == 0 {
 		return w.WriteLine(fmt.Sprintf("Log format is: %s", reflect.TypeOf(l.Formatter)))
 	}
@@ -731,7 +735,7 @@ func sshPrintTunnel(ifce *Interface, fs interface{}, a []string, w sshd.StringWr
 		return w.WriteLine(fmt.Sprintf("The provided vpn ip could not be parsed: %s", a[0]))
 	}
 
-	hostInfo, err := ifce.hostMap.QueryVpnIP(uint32(vpnIp))
+	hostInfo, err := ifce.hostMap.QueryVpnIP(vpnIp)
 	if err != nil {
 		return w.WriteLine(fmt.Sprintf("Could not find tunnel for vpn ip: %v", a[0]))
 	}
@@ -741,7 +745,7 @@ func sshPrintTunnel(ifce *Interface, fs interface{}, a []string, w sshd.StringWr
 		enc.SetIndent("", "    ")
 	}
 
-	return enc.Encode(hostInfo)
+	return enc.Encode(copyHostInfo(hostInfo, ifce.hostMap.preferredRanges))
 }
 
 func sshReload(fs interface{}, a []string, w sshd.StringWriter) error {

sshd/server.go

@@ -1,8 +1,10 @@
 package sshd
 
 import (
+	"errors"
 	"fmt"
 	"net"
+	"sync"
 
 	"github.com/armon/go-radix"
 	"github.com/sirupsen/logrus"
@@ -20,8 +22,11 @@ type SSHServer struct {
 	helpCommand *Command
 	commands    *radix.Tree
 	listener    net.Listener
-	conns       map[int]*session
-	counter     int
+
+	// Locks the conns/counter to avoid concurrent map access
+	connsLock sync.Mutex
+	conns     map[int]*session
+	counter   int
 }
 
 // NewSSHServer creates a new ssh server rigged with default commands and prepares to listen
@@ -97,11 +102,24 @@ func (s *SSHServer) Run(addr string) error {
 	}
 
 	s.l.WithField("sshListener", addr).Info("SSH server is listening")
+
+	// Run loops until there is an error
+	s.run()
+	s.closeSessions()
+
+	s.l.Info("SSH server stopped listening")
+	// We don't return an error because run logs for us
+	return nil
+}
+
+func (s *SSHServer) run() {
 	for {
 		c, err := s.listener.Accept()
 		if err != nil {
-			s.l.WithError(err).Warn("Error in listener, shutting down")
-			return nil
+			if !errors.Is(err, net.ErrClosed) {
+				s.l.WithError(err).Warn("Error in listener, shutting down")
+			}
+			return
 		}
 
 		conn, chans, reqs, err := ssh.NewServerConn(c, s.config)
@@ -127,36 +145,38 @@ func (s *SSHServer) Run(addr string) error {
 		l.WithField("remoteAddress", c.RemoteAddr()).WithField("sshFingerprint", fp).Info("ssh user logged in")
 
 		session := NewSession(s.commands, conn, chans, l.WithField("subsystem", "sshd.session"))
+		s.connsLock.Lock()
 		s.counter++
 		counter := s.counter
 		s.conns[counter] = session
+		s.connsLock.Unlock()
 
 		go ssh.DiscardRequests(reqs)
 		go func() {
 			<-session.exitChan
 			s.l.WithField("id", counter).Debug("closing conn")
+			s.connsLock.Lock()
 			delete(s.conns, counter)
+			s.connsLock.Unlock()
 		}()
 	}
 }
 
 func (s *SSHServer) Stop() {
+	// Close the listener, this will cause all session to terminate as well, see SSHServer.Run
+	if s.listener != nil {
+		if err := s.listener.Close(); err != nil {
+			s.l.WithError(err).Warn("Failed to close the sshd listener")
+		}
+	}
+}
+
+func (s *SSHServer) closeSessions() {
+	s.connsLock.Lock()
 	for _, c := range s.conns {
 		c.Close()
 	}
-
-	if s.listener == nil {
-		return
-	}
-
-	err := s.listener.Close()
-	if err != nil {
-		s.l.WithError(err).Warn("Failed to close the sshd listener")
-		return
-	}
-
-	s.l.Info("SSH server stopped listening")
-	return
+	s.connsLock.Unlock()
 }
 
 func (s *SSHServer) matchPubKey(c ssh.ConnMetadata, pubKey ssh.PublicKey) (*ssh.Permissions, error) {

stats.go

@@ -6,6 +6,7 @@ import (
 	"log"
 	"net"
 	"net/http"
+	"runtime"
 	"time"
 
 	graphite "github.com/cyberdelia/go-metrics-graphite"
@@ -13,26 +14,38 @@ import (
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
 	"github.com/rcrowley/go-metrics"
+	"github.com/sirupsen/logrus"
 )
 
-func startStats(c *Config, configTest bool) error {
+// startStats initializes stats from config. On success, if any futher work
+// is needed to serve stats, it returns a func to handle that work. If no
+// work is needed, it'll return nil. On failure, it returns nil, error.
+func startStats(l *logrus.Logger, c *Config, buildVersion string, configTest bool) (func(), error) {
 	mType := c.GetString("stats.type", "")
 	if mType == "" || mType == "none" {
-		return nil
+		return nil, nil
 	}
 
 	interval := c.GetDuration("stats.interval", 0)
 	if interval == 0 {
-		return fmt.Errorf("stats.interval was an invalid duration: %s", c.GetString("stats.interval", ""))
+		return nil, fmt.Errorf("stats.interval was an invalid duration: %s", c.GetString("stats.interval", ""))
 	}
 
+	var startFn func()
 	switch mType {
 	case "graphite":
-		startGraphiteStats(interval, c, configTest)
+		err := startGraphiteStats(l, interval, c, configTest)
+		if err != nil {
+			return nil, err
+		}
 	case "prometheus":
-		startPrometheusStats(interval, c, configTest)
+		var err error
+		startFn, err = startPrometheusStats(l, interval, c, buildVersion, configTest)
+		if err != nil {
+			return nil, err
+		}
 	default:
-		return fmt.Errorf("stats.type was not understood: %s", mType)
+		return nil, fmt.Errorf("stats.type was not understood: %s", mType)
 	}
 
 	metrics.RegisterDebugGCStats(metrics.DefaultRegistry)
@@ -41,10 +54,10 @@ func startStats(c *Config, configTest bool) error {
 	go metrics.CaptureDebugGCStats(metrics.DefaultRegistry, interval)
 	go metrics.CaptureRuntimeMemStats(metrics.DefaultRegistry, interval)
 
-	return nil
+	return startFn, nil
 }
 
-func startGraphiteStats(i time.Duration, c *Config, configTest bool) error {
+func startGraphiteStats(l *logrus.Logger, i time.Duration, c *Config, configTest bool) error {
 	proto := c.GetString("stats.protocol", "tcp")
 	host := c.GetString("stats.host", "")
 	if host == "" {
@@ -57,38 +70,53 @@ func startGraphiteStats(i time.Duration, c *Config, configTest bool) error {
 		return fmt.Errorf("error while setting up graphite sink: %s", err)
 	}
 
-	l.Infof("Starting graphite. Interval: %s, prefix: %s, addr: %s", i, prefix, addr)
 	if !configTest {
+		l.Infof("Starting graphite. Interval: %s, prefix: %s, addr: %s", i, prefix, addr)
 		go graphite.Graphite(metrics.DefaultRegistry, i, prefix, addr)
 	}
 	return nil
 }
 
-func startPrometheusStats(i time.Duration, c *Config, configTest bool) error {
+func startPrometheusStats(l *logrus.Logger, i time.Duration, c *Config, buildVersion string, configTest bool) (func(), error) {
 	namespace := c.GetString("stats.namespace", "")
 	subsystem := c.GetString("stats.subsystem", "")
 
 	listen := c.GetString("stats.listen", "")
 	if listen == "" {
-		return fmt.Errorf("stats.listen should not be empty")
+		return nil, fmt.Errorf("stats.listen should not be empty")
 	}
 
 	path := c.GetString("stats.path", "")
 	if path == "" {
-		return fmt.Errorf("stats.path should not be empty")
+		return nil, fmt.Errorf("stats.path should not be empty")
 	}
 
 	pr := prometheus.NewRegistry()
 	pClient := mp.NewPrometheusProvider(metrics.DefaultRegistry, namespace, subsystem, pr, i)
 	go pClient.UpdatePrometheusMetrics()
 
+	// Export our version information as labels on a static gauge
+	g := prometheus.NewGauge(prometheus.GaugeOpts{
+		Namespace: namespace,
+		Subsystem: subsystem,
+		Name:      "info",
+		Help:      "Version information for the Nebula binary",
+		ConstLabels: prometheus.Labels{
+			"version":   buildVersion,
+			"goversion": runtime.Version(),
+		},
+	})
+	pr.MustRegister(g)
+	g.Set(1)
+
+	var startFn func()
 	if !configTest {
-		go func() {
+		startFn = func() {
 			l.Infof("Prometheus stats listening on %s at %s", listen, path)
 			http.Handle(path, promhttp.HandlerFor(pr, promhttp.HandlerOpts{ErrorLog: l}))
 			log.Fatal(http.ListenAndServe(listen, nil))
-		}()
+		}
 	}
 
-	return nil
+	return startFn, nil
 }

tun_android.go

@@ -1,3 +1,5 @@
+// +build !e2e_testing
+
 package nebula
 
 import (
@@ -6,6 +8,7 @@ import (
 	"net"
 	"os"
 
+	"github.com/sirupsen/logrus"
 	"golang.org/x/sys/unix"
 )
 
@@ -19,9 +22,10 @@ type Tun struct {
 	TXQueueLen   int
 	Routes       []route
 	UnsafeRoutes []route
+	l            *logrus.Logger
 }
 
-func newTunFromFd(deviceFd int, cidr *net.IPNet, defaultMTU int, routes []route, unsafeRoutes []route, txQueueLen int) (ifce *Tun, err error) {
+func newTunFromFd(l *logrus.Logger, deviceFd int, cidr *net.IPNet, defaultMTU int, routes []route, unsafeRoutes []route, txQueueLen int) (ifce *Tun, err error) {
 	file := os.NewFile(uintptr(deviceFd), "/dev/net/tun")
 
 	ifce = &Tun{
@@ -33,11 +37,12 @@ func newTunFromFd(deviceFd int, cidr *net.IPNet, defaultMTU int, routes []route,
 		TXQueueLen:      txQueueLen,
 		Routes:          routes,
 		UnsafeRoutes:    unsafeRoutes,
+		l:               l,
 	}
 	return
 }
 
-func newTun(deviceName string, cidr *net.IPNet, defaultMTU int, routes []route, unsafeRoutes []route, txQueueLen int) (ifce *Tun, err error) {
+func newTun(l *logrus.Logger, deviceName string, cidr *net.IPNet, defaultMTU int, routes []route, unsafeRoutes []route, txQueueLen int, multiqueue bool) (ifce *Tun, err error) {
 	return nil, fmt.Errorf("newTun not supported in Android")
 }
 
@@ -74,3 +79,7 @@ func (c *Tun) CidrNet() *net.IPNet {
 func (c *Tun) DeviceName() string {
 	return c.Device
 }
+
+func (t *Tun) NewMultiQueueReader() (io.ReadWriteCloser, error) {
+	return nil, fmt.Errorf("TODO: multiqueue not implemented for android")
+}

tun_darwin.go

@@ -1,13 +1,16 @@
 // +build !ios
+// +build !e2e_testing
 
 package nebula
 
 import (
 	"fmt"
+	"io"
 	"net"
 	"os/exec"
 	"strconv"
 
+	"github.com/sirupsen/logrus"
 	"github.com/songgao/water"
 )
 
@@ -16,11 +19,11 @@ type Tun struct {
 	Cidr         *net.IPNet
 	MTU          int
 	UnsafeRoutes []route
-
+	l            *logrus.Logger
 	*water.Interface
 }
 
-func newTun(deviceName string, cidr *net.IPNet, defaultMTU int, routes []route, unsafeRoutes []route, txQueueLen int) (ifce *Tun, err error) {
+func newTun(l *logrus.Logger, deviceName string, cidr *net.IPNet, defaultMTU int, routes []route, unsafeRoutes []route, txQueueLen int, multiqueue bool) (ifce *Tun, err error) {
 	if len(routes) > 0 {
 		return nil, fmt.Errorf("route MTU not supported in Darwin")
 	}
@@ -30,10 +33,11 @@ func newTun(deviceName string, cidr *net.IPNet, defaultMTU int, routes []route,
 		Cidr:         cidr,
 		MTU:          defaultMTU,
 		UnsafeRoutes: unsafeRoutes,
+		l:            l,
 	}, nil
 }
 
-func newTunFromFd(deviceFd int, cidr *net.IPNet, defaultMTU int, routes []route, unsafeRoutes []route, txQueueLen int) (ifce *Tun, err error) {
+func newTunFromFd(l *logrus.Logger, deviceFd int, cidr *net.IPNet, defaultMTU int, routes []route, unsafeRoutes []route, txQueueLen int) (ifce *Tun, err error) {
 	return nil, fmt.Errorf("newTunFromFd not supported in Darwin")
 }
 
@@ -80,3 +84,7 @@ func (c *Tun) WriteRaw(b []byte) error {
 	_, err := c.Write(b)
 	return err
 }
+
+func (t *Tun) NewMultiQueueReader() (io.ReadWriteCloser, error) {
+	return nil, fmt.Errorf("TODO: multiqueue not implemented for darwin")
+}

tun_disabled.go

@@ -1,26 +1,42 @@
 package nebula
 
 import (
+	"encoding/binary"
 	"fmt"
 	"io"
 	"net"
 	"strings"
 
-	log "github.com/sirupsen/logrus"
+	"github.com/rcrowley/go-metrics"
+	"github.com/sirupsen/logrus"
 )
 
 type disabledTun struct {
-	block  chan struct{}
-	cidr   *net.IPNet
-	logger *log.Logger
+	read chan []byte
+	cidr *net.IPNet
+
+	// Track these metrics since we don't have the tun device to do it for us
+	tx metrics.Counter
+	rx metrics.Counter
+	l  *logrus.Logger
 }
 
-func newDisabledTun(cidr *net.IPNet, l *log.Logger) *disabledTun {
-	return &disabledTun{
-		cidr:   cidr,
-		block:  make(chan struct{}),
-		logger: l,
+func newDisabledTun(cidr *net.IPNet, queueLen int, metricsEnabled bool, l *logrus.Logger) *disabledTun {
+	tun := &disabledTun{
+		cidr: cidr,
+		read: make(chan []byte, queueLen),
+		l:    l,
 	}
+
+	if metricsEnabled {
+		tun.tx = metrics.GetOrRegisterCounter("messages.tx.message", nil)
+		tun.rx = metrics.GetOrRegisterCounter("messages.rx.message", nil)
+	} else {
+		tun.tx = &metrics.NilCounter{}
+		tun.rx = &metrics.NilCounter{}
+	}
+
+	return tun
 }
 
 func (*disabledTun) Activate() error {
@@ -36,12 +52,73 @@ func (*disabledTun) DeviceName() string {
 }
 
 func (t *disabledTun) Read(b []byte) (int, error) {
-	<-t.block
-	return 0, io.EOF
+	r, ok := <-t.read
+	if !ok {
+		return 0, io.EOF
+	}
+
+	if len(r) > len(b) {
+		return 0, fmt.Errorf("packet larger than mtu: %d > %d bytes", len(r), len(b))
+	}
+
+	t.tx.Inc(1)
+	if t.l.Level >= logrus.DebugLevel {
+		t.l.WithField("raw", prettyPacket(r)).Debugf("Write payload")
+	}
+
+	return copy(b, r), nil
+}
+
+func (t *disabledTun) handleICMPEchoRequest(b []byte) bool {
+	// Return early if this is not a simple ICMP Echo Request
+	if !(len(b) >= 28 && len(b) <= mtu && b[0] == 0x45 && b[9] == 0x01 && b[20] == 0x08) {
+		return false
+	}
+
+	// We don't support fragmented packets
+	if b[7] != 0 || (b[6]&0x2F != 0) {
+		return false
+	}
+
+	buf := make([]byte, len(b))
+	copy(buf, b)
+
+	// Swap dest / src IPs and recalculate checksum
+	ipv4 := buf[0:20]
+	copy(ipv4[12:16], b[16:20])
+	copy(ipv4[16:20], b[12:16])
+	ipv4[10] = 0
+	ipv4[11] = 0
+	binary.BigEndian.PutUint16(ipv4[10:], ipChecksum(ipv4))
+
+	// Change type to ICMP Echo Reply and recalculate checksum
+	icmp := buf[20:]
+	icmp[0] = 0
+	icmp[2] = 0
+	icmp[3] = 0
+	binary.BigEndian.PutUint16(icmp[2:], ipChecksum(icmp))
+
+	// attempt to write it, but don't block
+	select {
+	case t.read <- buf:
+	default:
+		t.l.Debugf("tun_disabled: dropped ICMP Echo Reply response")
+	}
+
+	return true
 }
 
 func (t *disabledTun) Write(b []byte) (int, error) {
-	t.logger.WithField("raw", prettyPacket(b)).Debugf("Disabled tun received unexpected payload")
+	t.rx.Inc(1)
+
+	// Check for ICMP Echo Request before spending time doing the full parsing
+	if t.handleICMPEchoRequest(b) {
+		if t.l.Level >= logrus.DebugLevel {
+			t.l.WithField("raw", prettyPacket(b)).Debugf("Disabled tun responded to ICMP Echo Request")
+		}
+	} else if t.l.Level >= logrus.DebugLevel {
+		t.l.WithField("raw", prettyPacket(b)).Debugf("Disabled tun received unexpected payload")
+	}
 	return len(b), nil
 }
 
@@ -50,10 +127,14 @@ func (t *disabledTun) WriteRaw(b []byte) error {
 	return err
 }
 
+func (t *disabledTun) NewMultiQueueReader() (io.ReadWriteCloser, error) {
+	return t, nil
+}
+
 func (t *disabledTun) Close() error {
-	if t.block != nil {
-		close(t.block)
-		t.block = nil
+	if t.read != nil {
+		close(t.read)
+		t.read = nil
 	}
 	return nil
 }
@@ -72,3 +153,22 @@ func (p prettyPacket) String() string {
 
 	return s.String()
 }
+
+func ipChecksum(b []byte) uint16 {
+	var c uint32
+	sz := len(b) - 1
+
+	for i := 0; i < sz; i += 2 {
+		c += uint32(b[i]) << 8
+		c += uint32(b[i+1])
+	}
+	if sz%2 == 0 {
+		c += uint32(b[sz]) << 8
+	}
+
+	for (c >> 16) > 0 {
+		c = (c & 0xffff) + (c >> 16)
+	}
+
+	return ^uint16(c)
+}

tun_freebsd.go

@@ -1,3 +1,5 @@
+// +build !e2e_testing
+
 package nebula
 
 import (
@@ -9,6 +11,8 @@ import (
 	"regexp"
 	"strconv"
 	"strings"
+
+	"github.com/sirupsen/logrus"
 )
 
 var deviceNameRE = regexp.MustCompile(`^tun[0-9]+$`)
@@ -18,15 +22,16 @@ type Tun struct {
 	Cidr         *net.IPNet
 	MTU          int
 	UnsafeRoutes []route
+	l            *logrus.Logger
 
 	io.ReadWriteCloser
 }
 
-func newTunFromFd(deviceFd int, cidr *net.IPNet, defaultMTU int, routes []route, unsafeRoutes []route, txQueueLen int) (ifce *Tun, err error) {
+func newTunFromFd(l *logrus.Logger, deviceFd int, cidr *net.IPNet, defaultMTU int, routes []route, unsafeRoutes []route, txQueueLen int) (ifce *Tun, err error) {
 	return nil, fmt.Errorf("newTunFromFd not supported in FreeBSD")
 }
 
-func newTun(deviceName string, cidr *net.IPNet, defaultMTU int, routes []route, unsafeRoutes []route, txQueueLen int) (ifce *Tun, err error) {
+func newTun(l *logrus.Logger, deviceName string, cidr *net.IPNet, defaultMTU int, routes []route, unsafeRoutes []route, txQueueLen int, multiqueue bool) (ifce *Tun, err error) {
 	if len(routes) > 0 {
 		return nil, fmt.Errorf("Route MTU not supported in FreeBSD")
 	}
@@ -41,6 +46,7 @@ func newTun(deviceName string, cidr *net.IPNet, defaultMTU int, routes []route,
 		Cidr:         cidr,
 		MTU:          defaultMTU,
 		UnsafeRoutes: unsafeRoutes,
+		l:            l,
 	}, nil
 }
 
@@ -52,21 +58,21 @@ func (c *Tun) Activate() error {
 	}
 
 	// TODO use syscalls instead of exec.Command
-	l.Debug("command: ifconfig", c.Device, c.Cidr.String(), c.Cidr.IP.String())
+	c.l.Debug("command: ifconfig", c.Device, c.Cidr.String(), c.Cidr.IP.String())
 	if err = exec.Command("/sbin/ifconfig", c.Device, c.Cidr.String(), c.Cidr.IP.String()).Run(); err != nil {
 		return fmt.Errorf("failed to run 'ifconfig': %s", err)
 	}
-	l.Debug("command: route", "-n", "add", "-net", c.Cidr.String(), "-interface", c.Device)
+	c.l.Debug("command: route", "-n", "add", "-net", c.Cidr.String(), "-interface", c.Device)
 	if err = exec.Command("/sbin/route", "-n", "add", "-net", c.Cidr.String(), "-interface", c.Device).Run(); err != nil {
 		return fmt.Errorf("failed to run 'route add': %s", err)
 	}
-	l.Debug("command: ifconfig", c.Device, "mtu", strconv.Itoa(c.MTU))
+	c.l.Debug("command: ifconfig", c.Device, "mtu", strconv.Itoa(c.MTU))
 	if err = exec.Command("/sbin/ifconfig", c.Device, "mtu", strconv.Itoa(c.MTU)).Run(); err != nil {
 		return fmt.Errorf("failed to run 'ifconfig': %s", err)
 	}
 	// Unsafe path routes
 	for _, r := range c.UnsafeRoutes {
-		l.Debug("command: route", "-n", "add", "-net", r.route.String(), "-interface", c.Device)
+		c.l.Debug("command: route", "-n", "add", "-net", r.route.String(), "-interface", c.Device)
 		if err = exec.Command("/sbin/route", "-n", "add", "-net", r.route.String(), "-interface", c.Device).Run(); err != nil {
 			return fmt.Errorf("failed to run 'route add' for unsafe_route %s: %s", r.route.String(), err)
 		}
@@ -87,3 +93,7 @@ func (c *Tun) WriteRaw(b []byte) error {
 	_, err := c.Write(b)
 	return err
 }
+
+func (t *Tun) NewMultiQueueReader() (io.ReadWriteCloser, error) {
+	return nil, fmt.Errorf("TODO: multiqueue not implemented for freebsd")
+}

tun_ios.go

@@ -1,4 +1,5 @@
 // +build ios
+// +build !e2e_testing
 
 package nebula
 
@@ -10,6 +11,8 @@ import (
 	"os"
 	"sync"
 	"syscall"
+
+	"github.com/sirupsen/logrus"
 )
 
 type Tun struct {
@@ -18,11 +21,11 @@ type Tun struct {
 	Cidr   *net.IPNet
 }
 
-func newTun(deviceName string, cidr *net.IPNet, defaultMTU int, routes []route, unsafeRoutes []route, txQueueLen int) (ifce *Tun, err error) {
+func newTun(l *logrus.Logger, deviceName string, cidr *net.IPNet, defaultMTU int, routes []route, unsafeRoutes []route, txQueueLen int, multiqueue bool) (ifce *Tun, err error) {
 	return nil, fmt.Errorf("newTun not supported in iOS")
 }
 
-func newTunFromFd(deviceFd int, cidr *net.IPNet, defaultMTU int, routes []route, unsafeRoutes []route, txQueueLen int) (ifce *Tun, err error) {
+func newTunFromFd(l *logrus.Logger, deviceFd int, cidr *net.IPNet, defaultMTU int, routes []route, unsafeRoutes []route, txQueueLen int) (ifce *Tun, err error) {
 	if len(routes) > 0 {
 		return nil, fmt.Errorf("route MTU not supported in Darwin")
 	}
@@ -111,3 +114,7 @@ func (c *Tun) CidrNet() *net.IPNet {
 func (c *Tun) DeviceName() string {
 	return c.Device
 }
+
+func (t *Tun) NewMultiQueueReader() (io.ReadWriteCloser, error) {
+	return nil, fmt.Errorf("TODO: multiqueue not implemented for ios")
+}

tun_linux.go

@@ -1,4 +1,5 @@
 // +build !android
+// +build !e2e_testing
 
 package nebula
 
@@ -10,6 +11,7 @@ import (
 	"strings"
 	"unsafe"
 
+	"github.com/sirupsen/logrus"
 	"github.com/vishvananda/netlink"
 	"golang.org/x/sys/unix"
 )
@@ -24,6 +26,7 @@ type Tun struct {
 	TXQueueLen   int
 	Routes       []route
 	UnsafeRoutes []route
+	l            *logrus.Logger
 }
 
 type ifReq struct {
@@ -55,8 +58,9 @@ func ipv4(addr string) (o [4]byte, err error) {
 */
 
 const (
-	cIFF_TUN   = 0x0001
-	cIFF_NO_PI = 0x1000
+	cIFF_TUN         = 0x0001
+	cIFF_NO_PI       = 0x1000
+	cIFF_MULTI_QUEUE = 0x0100
 )
 
 type ifreqAddr struct {
@@ -77,7 +81,7 @@ type ifreqQLEN struct {
 	pad   [8]byte
 }
 
-func newTunFromFd(deviceFd int, cidr *net.IPNet, defaultMTU int, routes []route, unsafeRoutes []route, txQueueLen int) (ifce *Tun, err error) {
+func newTunFromFd(l *logrus.Logger, deviceFd int, cidr *net.IPNet, defaultMTU int, routes []route, unsafeRoutes []route, txQueueLen int) (ifce *Tun, err error) {
 
 	file := os.NewFile(uintptr(deviceFd), "/dev/net/tun")
 
@@ -90,11 +94,12 @@ func newTunFromFd(deviceFd int, cidr *net.IPNet, defaultMTU int, routes []route,
 		TXQueueLen:      txQueueLen,
 		Routes:          routes,
 		UnsafeRoutes:    unsafeRoutes,
+		l:               l,
 	}
 	return
 }
 
-func newTun(deviceName string, cidr *net.IPNet, defaultMTU int, routes []route, unsafeRoutes []route, txQueueLen int) (ifce *Tun, err error) {
+func newTun(l *logrus.Logger, deviceName string, cidr *net.IPNet, defaultMTU int, routes []route, unsafeRoutes []route, txQueueLen int, multiqueue bool) (ifce *Tun, err error) {
 	fd, err := unix.Open("/dev/net/tun", os.O_RDWR, 0)
 	if err != nil {
 		return nil, err
@@ -102,9 +107,12 @@ func newTun(deviceName string, cidr *net.IPNet, defaultMTU int, routes []route,
 
 	var req ifReq
 	req.Flags = uint16(cIFF_TUN | cIFF_NO_PI)
+	if multiqueue {
+		req.Flags |= cIFF_MULTI_QUEUE
+	}
 	copy(req.Name[:], deviceName)
 	if err = ioctl(uintptr(fd), uintptr(unix.TUNSETIFF), uintptr(unsafe.Pointer(&req))); err != nil {
-		return
+		return nil, err
 	}
 	name := strings.Trim(string(req.Name[:]), "\x00")
 
@@ -127,10 +135,29 @@ func newTun(deviceName string, cidr *net.IPNet, defaultMTU int, routes []route,
 		TXQueueLen:      txQueueLen,
 		Routes:          routes,
 		UnsafeRoutes:    unsafeRoutes,
+		l:               l,
 	}
 	return
 }
 
+func (c *Tun) NewMultiQueueReader() (io.ReadWriteCloser, error) {
+	fd, err := unix.Open("/dev/net/tun", os.O_RDWR, 0)
+	if err != nil {
+		return nil, err
+	}
+
+	var req ifReq
+	req.Flags = uint16(cIFF_TUN | cIFF_NO_PI | cIFF_MULTI_QUEUE)
+	copy(req.Name[:], c.Device)
+	if err = ioctl(uintptr(fd), uintptr(unix.TUNSETIFF), uintptr(unsafe.Pointer(&req))); err != nil {
+		return nil, err
+	}
+
+	file := os.NewFile(uintptr(fd), "/dev/net/tun")
+
+	return file, nil
+}
+
 func (c *Tun) WriteRaw(b []byte) error {
 	var nn int
 	for {
@@ -153,6 +180,10 @@ func (c *Tun) WriteRaw(b []byte) error {
 	}
 }
 
+func (c *Tun) Write(b []byte) (int, error) {
+	return len(b), c.WriteRaw(b)
+}
+
 func (c Tun) deviceBytes() (o [16]byte) {
 	for i, c := range c.Device {
 		o[i] = byte(c)
@@ -207,14 +238,14 @@ func (c Tun) Activate() error {
 	ifm := ifreqMTU{Name: devName, MTU: int32(c.MaxMTU)}
 	if err = ioctl(fd, unix.SIOCSIFMTU, uintptr(unsafe.Pointer(&ifm))); err != nil {
 		// This is currently a non fatal condition because the route table must have the MTU set appropriately as well
-		l.WithError(err).Error("Failed to set tun mtu")
+		c.l.WithError(err).Error("Failed to set tun mtu")
 	}
 
 	// Set the transmit queue length
 	ifrq := ifreqQLEN{Name: devName, Value: int32(c.TXQueueLen)}
 	if err = ioctl(fd, unix.SIOCSIFTXQLEN, uintptr(unsafe.Pointer(&ifrq))); err != nil {
 		// If we can't set the queue length nebula will still work but it may lead to packet loss
-		l.WithError(err).Error("Failed to set tun tx queue length")
+		c.l.WithError(err).Error("Failed to set tun tx queue length")
 	}
 
 	// Bring up the interface

tun_linux_test.go

@@ -1,3 +1,5 @@
+// +build !e2e_testing
+
 package nebula
 
 import "testing"

tun_test.go

@@ -9,7 +9,8 @@ import (
 )
 
 func Test_parseRoutes(t *testing.T) {
-	c := NewConfig()
+	l := NewTestLogger()
+	c := NewConfig(l)
 	_, n, _ := net.ParseCIDR("10.0.0.0/24")
 
 	// test no routes config
@@ -104,7 +105,8 @@ func Test_parseRoutes(t *testing.T) {
 }
 
 func Test_parseUnsafeRoutes(t *testing.T) {
-	c := NewConfig()
+	l := NewTestLogger()
+	c := NewConfig(l)
 	_, n, _ := net.ParseCIDR("10.0.0.0/24")
 
 	// test no routes config

tun_tester.go

@@ -0,0 +1,104 @@
+// +build e2e_testing
+
+package nebula
+
+import (
+	"fmt"
+	"io"
+	"net"
+
+	"github.com/sirupsen/logrus"
+)
+
+type Tun struct {
+	Device       string
+	Cidr         *net.IPNet
+	MTU          int
+	UnsafeRoutes []route
+	l            *logrus.Logger
+
+	rxPackets chan []byte // Packets to receive into nebula
+	txPackets chan []byte // Packets transmitted outside by nebula
+}
+
+func newTun(l *logrus.Logger, deviceName string, cidr *net.IPNet, defaultMTU int, _ []route, unsafeRoutes []route, _ int, _ bool) (ifce *Tun, err error) {
+	return &Tun{
+		Device:       deviceName,
+		Cidr:         cidr,
+		MTU:          defaultMTU,
+		UnsafeRoutes: unsafeRoutes,
+		l:            l,
+		rxPackets:    make(chan []byte, 1),
+		txPackets:    make(chan []byte, 1),
+	}, nil
+}
+
+func newTunFromFd(_ *logrus.Logger, _ int, _ *net.IPNet, _ int, _ []route, _ []route, _ int) (ifce *Tun, err error) {
+	return nil, fmt.Errorf("newTunFromFd not supported")
+}
+
+// Send will place a byte array onto the receive queue for nebula to consume
+// These are unencrypted ip layer frames destined for another nebula node.
+// packets should exit the udp side, capture them with udpConn.Get
+func (c *Tun) Send(packet []byte) {
+	c.l.WithField("dataLen", len(packet)).Info("Tun receiving injected packet")
+	c.rxPackets <- packet
+}
+
+// Get will pull an unencrypted ip layer frame from the transmit queue
+// nebula meant to send this message to some application on the local system
+// packets were ingested from the udp side, you can send them with udpConn.Send
+func (c *Tun) Get(block bool) []byte {
+	if block {
+		return <-c.txPackets
+	}
+
+	select {
+	case p := <-c.txPackets:
+		return p
+	default:
+		return nil
+	}
+}
+
+//********************************************************************************************************************//
+// Below this is boilerplate implementation to make nebula actually work
+//********************************************************************************************************************//
+
+func (c *Tun) Activate() error {
+	return nil
+}
+
+func (c *Tun) CidrNet() *net.IPNet {
+	return c.Cidr
+}
+
+func (c *Tun) DeviceName() string {
+	return c.Device
+}
+
+func (c *Tun) Write(b []byte) (n int, err error) {
+	return len(b), c.WriteRaw(b)
+}
+
+func (c *Tun) Close() error {
+	close(c.rxPackets)
+	return nil
+}
+
+func (c *Tun) WriteRaw(b []byte) error {
+	packet := make([]byte, len(b), len(b))
+	copy(packet, b)
+	c.txPackets <- packet
+	return nil
+}
+
+func (c *Tun) Read(b []byte) (int, error) {
+	p := <-c.rxPackets
+	copy(b, p)
+	return len(p), nil
+}
+
+func (c *Tun) NewMultiQueueReader() (io.ReadWriteCloser, error) {
+	return nil, fmt.Errorf("TODO: multiqueue not implemented")
+}

tun_windows.go

@@ -1,11 +1,15 @@
+// +build !e2e_testing
+
 package nebula
 
 import (
 	"fmt"
+	"io"
 	"net"
 	"os/exec"
 	"strconv"
 
+	"github.com/sirupsen/logrus"
 	"github.com/songgao/water"
 )
 
@@ -14,15 +18,16 @@ type Tun struct {
 	Cidr         *net.IPNet
 	MTU          int
 	UnsafeRoutes []route
+	l            *logrus.Logger
 
 	*water.Interface
 }
 
-func newTunFromFd(deviceFd int, cidr *net.IPNet, defaultMTU int, routes []route, unsafeRoutes []route, txQueueLen int) (ifce *Tun, err error) {
+func newTunFromFd(l *logrus.Logger, deviceFd int, cidr *net.IPNet, defaultMTU int, routes []route, unsafeRoutes []route, txQueueLen int) (ifce *Tun, err error) {
 	return nil, fmt.Errorf("newTunFromFd not supported in Windows")
 }
 
-func newTun(deviceName string, cidr *net.IPNet, defaultMTU int, routes []route, unsafeRoutes []route, txQueueLen int) (ifce *Tun, err error) {
+func newTun(l *logrus.Logger, deviceName string, cidr *net.IPNet, defaultMTU int, routes []route, unsafeRoutes []route, txQueueLen int, multiqueue bool) (ifce *Tun, err error) {
 	if len(routes) > 0 {
 		return nil, fmt.Errorf("route MTU not supported in Windows")
 	}
@@ -32,6 +37,7 @@ func newTun(deviceName string, cidr *net.IPNet, defaultMTU int, routes []route,
 		Cidr:         cidr,
 		MTU:          defaultMTU,
 		UnsafeRoutes: unsafeRoutes,
+		l:            l,
 	}, nil
 }
 
@@ -100,3 +106,7 @@ func (c *Tun) WriteRaw(b []byte) error {
 	_, err := c.Write(b)
 	return err
 }
+
+func (t *Tun) NewMultiQueueReader() (io.ReadWriteCloser, error) {
+	return nil, fmt.Errorf("TODO: multiqueue not implemented for windows")
+}

udp_all.go

@@ -0,0 +1,82 @@
+package nebula
+
+import (
+	"encoding/json"
+	"fmt"
+	"net"
+	"strconv"
+)
+
+type udpAddr struct {
+	IP   net.IP
+	Port uint16
+}
+
+func NewUDPAddr(ip net.IP, port uint16) *udpAddr {
+	addr := udpAddr{IP: make([]byte, net.IPv6len), Port: port}
+	copy(addr.IP, ip.To16())
+	return &addr
+}
+
+func NewUDPAddrFromString(s string) *udpAddr {
+	ip, port, err := parseIPAndPort(s)
+	//TODO: handle err
+	_ = err
+	return &udpAddr{IP: ip.To16(), Port: port}
+}
+
+func (ua *udpAddr) Equals(t *udpAddr) bool {
+	if t == nil || ua == nil {
+		return t == nil && ua == nil
+	}
+	return ua.IP.Equal(t.IP) && ua.Port == t.Port
+}
+
+func (ua *udpAddr) String() string {
+	if ua == nil {
+		return "<nil>"
+	}
+
+	return net.JoinHostPort(ua.IP.String(), fmt.Sprintf("%v", ua.Port))
+}
+
+func (ua *udpAddr) MarshalJSON() ([]byte, error) {
+	if ua == nil {
+		return nil, nil
+	}
+
+	return json.Marshal(m{"ip": ua.IP, "port": ua.Port})
+}
+
+func (ua *udpAddr) Copy() *udpAddr {
+	if ua == nil {
+		return nil
+	}
+
+	nu := udpAddr{
+		Port: ua.Port,
+		IP:   make(net.IP, len(ua.IP)),
+	}
+
+	copy(nu.IP, ua.IP)
+	return &nu
+}
+
+func parseIPAndPort(s string) (net.IP, uint16, error) {
+	rIp, sPort, err := net.SplitHostPort(s)
+	if err != nil {
+		return nil, 0, err
+	}
+
+	addr, err := net.ResolveIPAddr("ip", rIp)
+	if err != nil {
+		return nil, 0, err
+	}
+
+	iPort, err := strconv.Atoi(sPort)
+	if err != nil {
+		return nil, 0, err
+	}
+
+	return addr.IP, uint16(iPort), nil
+}

udp_android.go

@@ -1,3 +1,5 @@
+// +build !e2e_testing
+
 package nebula
 
 import (

udp_darwin.go

@@ -1,3 +1,5 @@
+// +build !e2e_testing
+
 package nebula
 
 // Darwin support is primarily implemented in udp_generic, besides NewListenConfig
@@ -28,6 +30,7 @@ func NewListenConfig(multi bool) net.ListenConfig {
 					return controlErr
 				}
 			}
+
 			return nil
 		},
 	}
@@ -39,5 +42,5 @@ func (u *udpConn) Rebind() error {
 		return err
 	}
 
-	return syscall.SetsockoptInt(int(file.Fd()), unix.IPPROTO_IP, unix.IP_BOUND_IF, 0)
+	return syscall.SetsockoptInt(int(file.Fd()), unix.IPPROTO_IPV6, unix.IPV6_BOUND_IF, 0)
 }

udp_freebsd.go

@@ -1,3 +1,5 @@
+// +build !e2e_testing
+
 package nebula
 
 // FreeBSD support is primarily implemented in udp_generic, besides NewListenConfig

udp_generic.go

@@ -1,4 +1,5 @@
 // +build !linux android
+// +build !e2e_testing
 
 // udp_generic implements the nebula UDP interface in pure Go stdlib. This
 // means it can be used on platforms like Darwin and Windows.
@@ -7,77 +8,31 @@ package nebula
 
 import (
 	"context"
-	"encoding/binary"
 	"fmt"
 	"net"
-	"strconv"
-	"strings"
-)
 
-type udpAddr struct {
-	net.UDPAddr
-}
+	"github.com/sirupsen/logrus"
+)
 
 type udpConn struct {
 	*net.UDPConn
+	l *logrus.Logger
 }
 
-func NewUDPAddr(ip uint32, port uint16) *udpAddr {
-	return &udpAddr{
-		UDPAddr: net.UDPAddr{
-			IP:   int2ip(ip),
-			Port: int(port),
-		},
-	}
-}
-
-func NewUDPAddrFromString(s string) *udpAddr {
-	p := strings.Split(s, ":")
-	if len(p) < 2 {
-		return nil
-	}
-
-	port, _ := strconv.Atoi(p[1])
-	return &udpAddr{
-		UDPAddr: net.UDPAddr{
-			IP:   net.ParseIP(p[0]),
-			Port: port,
-		},
-	}
-}
-
-func NewListener(ip string, port int, multi bool) (*udpConn, error) {
+func NewListener(l *logrus.Logger, ip string, port int, multi bool) (*udpConn, error) {
 	lc := NewListenConfig(multi)
-	pc, err := lc.ListenPacket(context.TODO(), "udp4", fmt.Sprintf("%s:%d", ip, port))
+	pc, err := lc.ListenPacket(context.TODO(), "udp", fmt.Sprintf("%s:%d", ip, port))
 	if err != nil {
 		return nil, err
 	}
 	if uc, ok := pc.(*net.UDPConn); ok {
-		return &udpConn{UDPConn: uc}, nil
+		return &udpConn{UDPConn: uc, l: l}, nil
 	}
 	return nil, fmt.Errorf("Unexpected PacketConn: %T %#v", pc, pc)
 }
 
-func (ua *udpAddr) Equals(t *udpAddr) bool {
-	if t == nil || ua == nil {
-		return t == nil && ua == nil
-	}
-	return ua.IP.Equal(t.IP) && ua.Port == t.Port
-}
-
-func (ua *udpAddr) Copy() udpAddr {
-	nu := udpAddr{net.UDPAddr{
-		Port: ua.Port,
-		Zone: ua.Zone,
-		IP:   make(net.IP, len(ua.IP)),
-	}}
-
-	copy(nu.IP, ua.IP)
-	return nu
-}
-
 func (uc *udpConn) WriteTo(b []byte, addr *udpAddr) error {
-	_, err := uc.UDPConn.WriteToUDP(b, &addr.UDPAddr)
+	_, err := uc.UDPConn.WriteToUDP(b, &net.UDPAddr{IP: addr.IP, Port: int(addr.Port)})
 	return err
 }
 
@@ -86,7 +41,11 @@ func (uc *udpConn) LocalAddr() (*udpAddr, error) {
 
 	switch v := a.(type) {
 	case *net.UDPAddr:
-		return &udpAddr{UDPAddr: *v}, nil
+		addr := &udpAddr{IP: make([]byte, len(v.IP))}
+		copy(addr.IP, v.IP)
+		addr.Port = uint16(v.Port)
+		return addr, nil
+
 	default:
 		return nil, fmt.Errorf("LocalAddr returned: %#v", a)
 	}
@@ -96,39 +55,41 @@ func (u *udpConn) reloadConfig(c *Config) {
 	// TODO
 }
 
+func NewUDPStatsEmitter(udpConns []*udpConn) func() {
+	// No UDP stats for non-linux
+	return func() {}
+}
+
 type rawMessage struct {
 	Len uint32
 }
 
-func (u *udpConn) ListenOut(f *Interface) {
+func (u *udpConn) ListenOut(f *Interface, q int) {
 	plaintext := make([]byte, mtu)
 	buffer := make([]byte, mtu)
 	header := &Header{}
 	fwPacket := &FirewallPacket{}
-	udpAddr := &udpAddr{}
+	udpAddr := &udpAddr{IP: make([]byte, 16)}
 	nb := make([]byte, 12, 12)
 
+	lhh := f.lightHouse.NewRequestHandler()
+
+	conntrackCache := NewConntrackCacheTicker(f.conntrackCacheTimeout)
+
 	for {
 		// Just read one packet at a time
 		n, rua, err := u.ReadFromUDP(buffer)
 		if err != nil {
-			l.WithError(err).Error("Failed to read packets")
+			f.l.WithError(err).Error("Failed to read packets")
 			continue
 		}
 
-		udpAddr.UDPAddr = *rua
-		f.readOutsidePackets(udpAddr, plaintext[:0], buffer[:n], header, fwPacket, nb)
+		udpAddr.IP = rua.IP
+		udpAddr.Port = uint16(rua.Port)
+		f.readOutsidePackets(udpAddr, plaintext[:0], buffer[:n], header, fwPacket, lhh, nb, q, conntrackCache.Get(f.l))
 	}
 }
 
-func udp2ip(addr *udpAddr) net.IP {
-	return addr.IP
-}
-
-func udp2ipInt(addr *udpAddr) uint32 {
-	return binary.BigEndian.Uint32(addr.IP.To4())
-}
-
 func hostDidRoam(addr *udpAddr, newaddr *udpAddr) bool {
 	return !addr.Equals(newaddr)
 }

udp_linux.go

@@ -1,17 +1,17 @@
 // +build !android
+// +build !e2e_testing
 
 package nebula
 
 import (
 	"encoding/binary"
-	"encoding/json"
 	"fmt"
 	"net"
-	"strconv"
-	"strings"
 	"syscall"
 	"unsafe"
 
+	"github.com/rcrowley/go-metrics"
+	"github.com/sirupsen/logrus"
 	"golang.org/x/sys/unix"
 )
 
@@ -19,45 +19,31 @@ import (
 
 type udpConn struct {
 	sysFd int
-}
-
-type udpAddr struct {
-	IP   uint32
-	Port uint16
-}
-
-func NewUDPAddr(ip uint32, port uint16) *udpAddr {
-	return &udpAddr{IP: ip, Port: port}
-}
-
-func NewUDPAddrFromString(s string) *udpAddr {
-	p := strings.Split(s, ":")
-	if len(p) < 2 {
-		return nil
-	}
-
-	port, _ := strconv.Atoi(p[1])
-	return &udpAddr{
-		IP:   ip2int(net.ParseIP(p[0])),
-		Port: uint16(port),
-	}
-}
-
-type rawSockaddr struct {
-	Family uint16
-	Data   [14]uint8
-}
-
-type rawSockaddrAny struct {
-	Addr rawSockaddr
-	Pad  [96]int8
+	l     *logrus.Logger
 }
 
 var x int
 
-func NewListener(ip string, port int, multi bool) (*udpConn, error) {
+// From linux/sock_diag.h
+const (
+	_SK_MEMINFO_RMEM_ALLOC = iota
+	_SK_MEMINFO_RCVBUF
+	_SK_MEMINFO_WMEM_ALLOC
+	_SK_MEMINFO_SNDBUF
+	_SK_MEMINFO_FWD_ALLOC
+	_SK_MEMINFO_WMEM_QUEUED
+	_SK_MEMINFO_OPTMEM
+	_SK_MEMINFO_BACKLOG
+	_SK_MEMINFO_DROPS
+
+	_SK_MEMINFO_VARS
+)
+
+type _SK_MEMINFO [_SK_MEMINFO_VARS]uint32
+
+func NewListener(l *logrus.Logger, ip string, port int, multi bool) (*udpConn, error) {
 	syscall.ForkLock.RLock()
-	fd, err := unix.Socket(unix.AF_INET, unix.SOCK_DGRAM, unix.IPPROTO_UDP)
+	fd, err := unix.Socket(unix.AF_INET6, unix.SOCK_DGRAM, unix.IPPROTO_UDP)
 	if err == nil {
 		unix.CloseOnExec(fd)
 	}
@@ -68,8 +54,8 @@ func NewListener(ip string, port int, multi bool) (*udpConn, error) {
 		return nil, fmt.Errorf("unable to open socket: %s", err)
 	}
 
-	var lip [4]byte
-	copy(lip[:], net.ParseIP(ip).To4())
+	var lip [16]byte
+	copy(lip[:], net.ParseIP(ip))
 
 	if multi {
 		if err = unix.SetsockoptInt(fd, unix.SOL_SOCKET, unix.SO_REUSEPORT, 1); err != nil {
@@ -77,7 +63,8 @@ func NewListener(ip string, port int, multi bool) (*udpConn, error) {
 		}
 	}
 
-	if err = unix.Bind(fd, &unix.SockaddrInet4{Addr: lip, Port: port}); err != nil {
+	//TODO: support multiple listening IPs (for limiting ipv6)
+	if err = unix.Bind(fd, &unix.SockaddrInet6{Addr: lip, Port: port}); err != nil {
 		return nil, fmt.Errorf("unable to bind to socket: %s", err)
 	}
 
@@ -86,17 +73,13 @@ func NewListener(ip string, port int, multi bool) (*udpConn, error) {
 	//v, err := unix.GetsockoptInt(fd, unix.SOL_SOCKET, unix.SO_INCOMING_CPU)
 	//l.Println(v, err)
 
-	return &udpConn{sysFd: fd}, err
+	return &udpConn{sysFd: fd, l: l}, err
 }
 
 func (u *udpConn) Rebind() error {
 	return nil
 }
 
-func (ua *udpAddr) Copy() udpAddr {
-	return *ua
-}
-
 func (u *udpConn) SetRecvBuffer(n int) error {
 	return unix.SetsockoptInt(u.sysFd, unix.SOL_SOCKET, unix.SO_RCVBUFFORCE, n)
 }
@@ -114,38 +97,33 @@ func (u *udpConn) GetSendBuffer() (int, error) {
 }
 
 func (u *udpConn) LocalAddr() (*udpAddr, error) {
-	var rsa rawSockaddrAny
-	var rLen = unix.SizeofSockaddrAny
-
-	_, _, err := unix.Syscall(
-		unix.SYS_GETSOCKNAME,
-		uintptr(u.sysFd),
-		uintptr(unsafe.Pointer(&rsa)),
-		uintptr(unsafe.Pointer(&rLen)),
-	)
-
-	if err != 0 {
+	sa, err := unix.Getsockname(u.sysFd)
+	if err != nil {
 		return nil, err
 	}
 
 	addr := &udpAddr{}
-	if rsa.Addr.Family == unix.AF_INET {
-		addr.Port = uint16(rsa.Addr.Data[0])<<8 + uint16(rsa.Addr.Data[1])
-		addr.IP = uint32(rsa.Addr.Data[2])<<24 + uint32(rsa.Addr.Data[3])<<16 + uint32(rsa.Addr.Data[4])<<8 + uint32(rsa.Addr.Data[5])
-	} else {
-		addr.Port = 0
-		addr.IP = 0
+	switch sa := sa.(type) {
+	case *unix.SockaddrInet4:
+		addr.IP = net.IP{sa.Addr[0], sa.Addr[1], sa.Addr[2], sa.Addr[3]}.To16()
+		addr.Port = uint16(sa.Port)
+	case *unix.SockaddrInet6:
+		addr.IP = sa.Addr[0:]
+		addr.Port = uint16(sa.Port)
 	}
+
 	return addr, nil
 }
 
-func (u *udpConn) ListenOut(f *Interface) {
+func (u *udpConn) ListenOut(f *Interface, q int) {
 	plaintext := make([]byte, mtu)
 	header := &Header{}
 	fwPacket := &FirewallPacket{}
 	udpAddr := &udpAddr{}
 	nb := make([]byte, 12, 12)
 
+	lhh := f.lightHouse.NewRequestHandler()
+
 	//TODO: should we track this?
 	//metric := metrics.GetOrRegisterHistogram("test.batch_read", nil, metrics.NewExpDecaySample(1028, 0.015))
 	msgs, buffers, names := u.PrepareRawMessages(f.udpBatchSize)
@@ -154,19 +132,20 @@ func (u *udpConn) ListenOut(f *Interface) {
 		read = u.ReadSingle
 	}
 
+	conntrackCache := NewConntrackCacheTicker(f.conntrackCacheTimeout)
+
 	for {
 		n, err := read(msgs)
 		if err != nil {
-			l.WithError(err).Error("Failed to read packets")
+			u.l.WithError(err).Error("Failed to read packets")
 			continue
 		}
 
 		//metric.Update(int64(n))
 		for i := 0; i < n; i++ {
-			udpAddr.IP = binary.BigEndian.Uint32(names[i][4:8])
+			udpAddr.IP = names[i][8:24]
 			udpAddr.Port = binary.BigEndian.Uint16(names[i][2:4])
-
-			f.readOutsidePackets(udpAddr, plaintext[:0], buffers[i][:msgs[i].Len], header, fwPacket, nb)
+			f.readOutsidePackets(udpAddr, plaintext[:0], buffers[i][:msgs[i].Len], header, fwPacket, lhh, nb, q, conntrackCache.Get(u.l))
 		}
 	}
 }
@@ -213,18 +192,13 @@ func (u *udpConn) ReadMulti(msgs []rawMessage) (int, error) {
 }
 
 func (u *udpConn) WriteTo(b []byte, addr *udpAddr) error {
-	var rsa unix.RawSockaddrInet4
 
-	//TODO: sometimes addr is nil!
-	rsa.Family = unix.AF_INET
+	var rsa unix.RawSockaddrInet6
+	rsa.Family = unix.AF_INET6
 	p := (*[2]byte)(unsafe.Pointer(&rsa.Port))
 	p[0] = byte(addr.Port >> 8)
 	p[1] = byte(addr.Port)
-
-	rsa.Addr[0] = byte(addr.IP & 0xff000000 >> 24)
-	rsa.Addr[1] = byte(addr.IP & 0x00ff0000 >> 16)
-	rsa.Addr[2] = byte(addr.IP & 0x0000ff00 >> 8)
-	rsa.Addr[3] = byte(addr.IP & 0x000000ff)
+	copy(rsa.Addr[:], addr.IP)
 
 	for {
 		_, _, err := unix.Syscall6(
@@ -234,7 +208,7 @@ func (u *udpConn) WriteTo(b []byte, addr *udpAddr) error {
 			uintptr(len(b)),
 			uintptr(0),
 			uintptr(unsafe.Pointer(&rsa)),
-			uintptr(unix.SizeofSockaddrInet4),
+			uintptr(unix.SizeofSockaddrInet6),
 		)
 
 		if err != 0 {
@@ -254,12 +228,12 @@ func (u *udpConn) reloadConfig(c *Config) {
 		if err == nil {
 			s, err := u.GetRecvBuffer()
 			if err == nil {
-				l.WithField("size", s).Info("listen.read_buffer was set")
+				u.l.WithField("size", s).Info("listen.read_buffer was set")
 			} else {
-				l.WithError(err).Warn("Failed to get listen.read_buffer")
+				u.l.WithError(err).Warn("Failed to get listen.read_buffer")
 			}
 		} else {
-			l.WithError(err).Error("Failed to set listen.read_buffer")
+			u.l.WithError(err).Error("Failed to set listen.read_buffer")
 		}
 	}
 
@@ -269,37 +243,55 @@ func (u *udpConn) reloadConfig(c *Config) {
 		if err == nil {
 			s, err := u.GetSendBuffer()
 			if err == nil {
-				l.WithField("size", s).Info("listen.write_buffer was set")
+				u.l.WithField("size", s).Info("listen.write_buffer was set")
 			} else {
-				l.WithError(err).Warn("Failed to get listen.write_buffer")
+				u.l.WithError(err).Warn("Failed to get listen.write_buffer")
 			}
 		} else {
-			l.WithError(err).Error("Failed to set listen.write_buffer")
+			u.l.WithError(err).Error("Failed to set listen.write_buffer")
 		}
 	}
 }
 
-func (ua *udpAddr) Equals(t *udpAddr) bool {
-	if t == nil || ua == nil {
-		return t == nil && ua == nil
+func (u *udpConn) getMemInfo(meminfo *_SK_MEMINFO) error {
+	var vallen uint32 = 4 * _SK_MEMINFO_VARS
+	_, _, err := unix.Syscall6(unix.SYS_GETSOCKOPT, uintptr(u.sysFd), uintptr(unix.SOL_SOCKET), uintptr(unix.SO_MEMINFO), uintptr(unsafe.Pointer(meminfo)), uintptr(unsafe.Pointer(&vallen)), 0)
+	if err != 0 {
+		return err
 	}
-	return ua.IP == t.IP && ua.Port == t.Port
+	return nil
 }
 
-func (ua *udpAddr) String() string {
-	return fmt.Sprintf("%s:%v", int2ip(ua.IP), ua.Port)
-}
+func NewUDPStatsEmitter(udpConns []*udpConn) func() {
+	// Check if our kernel supports SO_MEMINFO before registering the gauges
+	var udpGauges [][_SK_MEMINFO_VARS]metrics.Gauge
+	var meminfo _SK_MEMINFO
+	if err := udpConns[0].getMemInfo(&meminfo); err == nil {
+		udpGauges = make([][_SK_MEMINFO_VARS]metrics.Gauge, len(udpConns))
+		for i := range udpConns {
+			udpGauges[i] = [_SK_MEMINFO_VARS]metrics.Gauge{
+				metrics.GetOrRegisterGauge(fmt.Sprintf("udp.%d.rmem_alloc", i), nil),
+				metrics.GetOrRegisterGauge(fmt.Sprintf("udp.%d.rcvbuf", i), nil),
+				metrics.GetOrRegisterGauge(fmt.Sprintf("udp.%d.wmem_alloc", i), nil),
+				metrics.GetOrRegisterGauge(fmt.Sprintf("udp.%d.sndbuf", i), nil),
+				metrics.GetOrRegisterGauge(fmt.Sprintf("udp.%d.fwd_alloc", i), nil),
+				metrics.GetOrRegisterGauge(fmt.Sprintf("udp.%d.wmem_queued", i), nil),
+				metrics.GetOrRegisterGauge(fmt.Sprintf("udp.%d.optmem", i), nil),
+				metrics.GetOrRegisterGauge(fmt.Sprintf("udp.%d.backlog", i), nil),
+				metrics.GetOrRegisterGauge(fmt.Sprintf("udp.%d.drops", i), nil),
+			}
+		}
+	}
 
-func (ua *udpAddr) MarshalJSON() ([]byte, error) {
-	return json.Marshal(m{"ip": int2ip(ua.IP), "port": ua.Port})
-}
-
-func udp2ip(addr *udpAddr) net.IP {
-	return int2ip(addr.IP)
-}
-
-func udp2ipInt(addr *udpAddr) uint32 {
-	return addr.IP
+	return func() {
+		for i, gauges := range udpGauges {
+			if err := udpConns[i].getMemInfo(&meminfo); err == nil {
+				for j := 0; j < _SK_MEMINFO_VARS; j++ {
+					gauges[j].Update(int64(meminfo[j]))
+				}
+			}
+		}
+	}
 }
 
 func hostDidRoam(addr *udpAddr, newaddr *udpAddr) bool {

udp_linux_32.go

@@ -1,10 +1,13 @@
 // +build linux
 // +build 386 amd64p32 arm mips mipsle
 // +build !android
+// +build !e2e_testing
 
 package nebula
 
-import "unsafe"
+import (
+	"golang.org/x/sys/unix"
+)
 
 type iovec struct {
 	Base *byte
@@ -33,17 +36,17 @@ func (u *udpConn) PrepareRawMessages(n int) ([]rawMessage, [][]byte, [][]byte) {
 
 	for i := range msgs {
 		buffers[i] = make([]byte, mtu)
-		names[i] = make([]byte, 0x1c) //TODO = sizeofSockaddrInet6
+		names[i] = make([]byte, unix.SizeofSockaddrInet6)
 
 		//TODO: this is still silly, no need for an array
 		vs := []iovec{
-			{Base: (*byte)(unsafe.Pointer(&buffers[i][0])), Len: uint32(len(buffers[i]))},
+			{Base: &buffers[i][0], Len: uint32(len(buffers[i]))},
 		}
 
 		msgs[i].Hdr.Iov = &vs[0]
 		msgs[i].Hdr.Iovlen = uint32(len(vs))
 
-		msgs[i].Hdr.Name = (*byte)(unsafe.Pointer(&names[i][0]))
+		msgs[i].Hdr.Name = &names[i][0]
 		msgs[i].Hdr.Namelen = uint32(len(names[i]))
 	}
 

udp_linux_64.go

@@ -1,10 +1,13 @@
 // +build linux
 // +build amd64 arm64 ppc64 ppc64le mips64 mips64le s390x
 // +build !android
+// +build !e2e_testing
 
 package nebula
 
-import "unsafe"
+import (
+	"golang.org/x/sys/unix"
+)
 
 type iovec struct {
 	Base *byte
@@ -36,17 +39,17 @@ func (u *udpConn) PrepareRawMessages(n int) ([]rawMessage, [][]byte, [][]byte) {
 
 	for i := range msgs {
 		buffers[i] = make([]byte, mtu)
-		names[i] = make([]byte, 0x1c) //TODO = sizeofSockaddrInet6
+		names[i] = make([]byte, unix.SizeofSockaddrInet6)
 
 		//TODO: this is still silly, no need for an array
 		vs := []iovec{
-			{Base: (*byte)(unsafe.Pointer(&buffers[i][0])), Len: uint64(len(buffers[i]))},
+			{Base: &buffers[i][0], Len: uint64(len(buffers[i]))},
 		}
 
 		msgs[i].Hdr.Iov = &vs[0]
 		msgs[i].Hdr.Iovlen = uint64(len(vs))
 
-		msgs[i].Hdr.Name = (*byte)(unsafe.Pointer(&names[i][0]))
+		msgs[i].Hdr.Name = &names[i][0]
 		msgs[i].Hdr.Namelen = uint32(len(names[i]))
 	}
 

udp_tester.go

@@ -0,0 +1,140 @@
+// +build e2e_testing
+
+package nebula
+
+import (
+	"fmt"
+	"net"
+
+	"github.com/sirupsen/logrus"
+)
+
+type UdpPacket struct {
+	ToIp     net.IP
+	ToPort   uint16
+	FromIp   net.IP
+	FromPort uint16
+	Data     []byte
+}
+
+func (u *UdpPacket) Copy() *UdpPacket {
+	n := &UdpPacket{
+		ToIp:     make(net.IP, len(u.ToIp)),
+		ToPort:   u.ToPort,
+		FromIp:   make(net.IP, len(u.FromIp)),
+		FromPort: u.FromPort,
+		Data:     make([]byte, len(u.Data)),
+	}
+
+	copy(n.ToIp, u.ToIp)
+	copy(n.FromIp, u.FromIp)
+	copy(n.Data, u.Data)
+	return n
+}
+
+type udpConn struct {
+	addr *udpAddr
+
+	rxPackets chan *UdpPacket // Packets to receive into nebula
+	txPackets chan *UdpPacket // Packets transmitted outside by nebula
+
+	l *logrus.Logger
+}
+
+func NewListener(l *logrus.Logger, ip string, port int, _ bool) (*udpConn, error) {
+	return &udpConn{
+		addr:      &udpAddr{net.ParseIP(ip), uint16(port)},
+		rxPackets: make(chan *UdpPacket, 1),
+		txPackets: make(chan *UdpPacket, 1),
+		l:         l,
+	}, nil
+}
+
+// Send will place a UdpPacket onto the receive queue for nebula to consume
+// this is an encrypted packet or a handshake message in most cases
+// packets were transmitted from another nebula node, you can send them with Tun.Send
+func (u *udpConn) Send(packet *UdpPacket) {
+	h := &Header{}
+	if err := h.Parse(packet.Data); err != nil {
+		panic(err)
+	}
+	u.l.WithField("header", h).
+		WithField("udpAddr", fmt.Sprintf("%v:%v", packet.FromIp, packet.FromPort)).
+		WithField("dataLen", len(packet.Data)).
+		Info("UDP receiving injected packet")
+	u.rxPackets <- packet
+}
+
+// Get will pull a UdpPacket from the transmit queue
+// nebula meant to send this message on the network, it will be encrypted
+// packets were ingested from the tun side (in most cases), you can send them with Tun.Send
+func (u *udpConn) Get(block bool) *UdpPacket {
+	if block {
+		return <-u.txPackets
+	}
+
+	select {
+	case p := <-u.txPackets:
+		return p
+	default:
+		return nil
+	}
+}
+
+//********************************************************************************************************************//
+// Below this is boilerplate implementation to make nebula actually work
+//********************************************************************************************************************//
+
+func (u *udpConn) WriteTo(b []byte, addr *udpAddr) error {
+	p := &UdpPacket{
+		Data:     make([]byte, len(b), len(b)),
+		FromIp:   make([]byte, 16),
+		FromPort: u.addr.Port,
+		ToIp:     make([]byte, 16),
+		ToPort:   addr.Port,
+	}
+
+	copy(p.Data, b)
+	copy(p.ToIp, addr.IP.To16())
+	copy(p.FromIp, u.addr.IP.To16())
+
+	u.txPackets <- p
+	return nil
+}
+
+func (u *udpConn) ListenOut(f *Interface, q int) {
+	plaintext := make([]byte, mtu)
+	header := &Header{}
+	fwPacket := &FirewallPacket{}
+	ua := &udpAddr{IP: make([]byte, 16)}
+	nb := make([]byte, 12, 12)
+
+	lhh := f.lightHouse.NewRequestHandler()
+	conntrackCache := NewConntrackCacheTicker(f.conntrackCacheTimeout)
+
+	for {
+		p := <-u.rxPackets
+		ua.Port = p.FromPort
+		copy(ua.IP, p.FromIp.To16())
+		f.readOutsidePackets(ua, plaintext[:0], p.Data, header, fwPacket, lhh, nb, q, conntrackCache.Get(u.l))
+	}
+}
+
+func (u *udpConn) reloadConfig(*Config) {}
+
+func NewUDPStatsEmitter(_ []*udpConn) func() {
+	// No UDP stats for non-linux
+	return func() {}
+}
+
+func (u *udpConn) LocalAddr() (*udpAddr, error) {
+	return u.addr, nil
+}
+
+func (u *udpConn) Rebind() error {
+	return nil
+}
+
+func hostDidRoam(addr *udpAddr, newaddr *udpAddr) bool {
+	return !addr.Equals(newaddr)
+}