v1.9.3 (#1160)

Update CHANGELOG for Nebula v1.9.3

CHANGELOG.md

@@ -7,6 +7,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [1.9.3] - 2024-06-06
+
+### Fixed
+
+- Initialize messageCounter to 2 instead of verifying later. (#1156)
+
 ## [1.9.2] - 2024-06-03
 
 ### Fixed
@@ -638,7 +644,8 @@ created.)
 
 - Initial public release.
 
-[Unreleased]: https://github.com/slackhq/nebula/compare/v1.9.2...HEAD
+[Unreleased]: https://github.com/slackhq/nebula/compare/v1.9.3...HEAD
+[1.9.3]: https://github.com/slackhq/nebula/releases/tag/v1.9.3
 [1.9.2]: https://github.com/slackhq/nebula/releases/tag/v1.9.2
 [1.9.1]: https://github.com/slackhq/nebula/releases/tag/v1.9.1
 [1.9.0]: https://github.com/slackhq/nebula/releases/tag/v1.9.0

connection_state.go

@@ -72,6 +72,8 @@ func NewConnectionState(l *logrus.Logger, cipher string, certState *CertState, i
 		window:    b,
 		myCert:    certState.Certificate,
 	}
+	// always start the counter from 2, as packet 1 and packet 2 are handshake packets.
+	ci.messageCounter.Add(2)
 
 	return ci
 }

handshake_ix.go

@@ -1,7 +1,6 @@
 package nebula
 
 import (
-	"fmt"
 	"time"
 
 	"github.com/flynn/noise"
@@ -47,7 +46,6 @@ func ixHandshakeStage0(f *Interface, hh *HandshakeHostInfo) bool {
 	}
 
 	h := header.Encode(make([]byte, header.Len), header.Version, header.Handshake, header.HandshakeIXPSK0, 0, 1)
-	ci.messageCounter.Add(1)
 
 	msg, _, _, err := ci.H.WriteMessage(h, hsBytes)
 	if err != nil {
@@ -322,10 +320,6 @@ func ixHandshakeStage1(f *Interface, addr *udp.Addr, via *ViaSender, packet []by
 	}
 
 	f.connectionManager.AddTrafficWatch(hostinfo.localIndexId)
-	prev := hostinfo.ConnectionState.messageCounter.Swap(2)
-	if prev > 2 {
-		panic(fmt.Errorf("invalid state: messageCounter > 2 before handshake complete: %v", prev))
-	}
 
 	hostinfo.remotes.ResetBlockedRemotes()
 
@@ -468,11 +462,6 @@ func ixHandshakeStage2(f *Interface, addr *udp.Addr, via *ViaSender, hh *Handsha
 	// Build up the radix for the firewall if we have subnets in the cert
 	hostinfo.CreateRemoteCIDR(remoteCert)
 
-	prev := hostinfo.ConnectionState.messageCounter.Swap(2)
-	if prev > 2 {
-		panic(fmt.Errorf("invalid state: messageCounter > 2 before handshake complete: %v", prev))
-	}
-
 	// Complete our handshake and update metrics, this will replace any existing tunnels for this vpnIp
 	f.handshakeManager.Complete(hostinfo, f)
 	f.connectionManager.AddTrafficWatch(hostinfo.localIndexId)