0.6.7

README.md

@@ -4,7 +4,7 @@ Set Linux as router in one command. Able to provide Internet, or create WiFi hot
 
 It wraps `iptables`, `dnsmasq` etc. stuff. Use in one command, restore in one command or by `control-c` (or even by closing terminal window).
 
-[More tools and projects 🛠️](https://garywill.github.io) | [🍻 Buy me a coffee ❤️](https://github.com/garywill/receiving/blob/master/receiving_methods.md)
+[Linux-Router News & Developer Notes 📰](https://github.com/garywill/linux-router/issues/28) | [More tools and projects 🛠️](https://garywill.github.io) | [🍻 Buy me a coffee ❤️](https://github.com/garywill/receiving/blob/master/receiving_methods.md)
 
 ## Features
 
@@ -23,7 +23,7 @@ Basic features:
   - Create AP on the same interface you are getting Internet (usually require same channel)
 - Transparent proxy (redsocks)
 - Transparent DNS proxy (hijack port 53 packets)
-- Compatible with NetworkManager (automatically set interface as unmanaged)
+- Detect NetworkManager and make sure it won't interfere (handle interface (un)managed status)
 - You can run many instances, to create many different networks. Has instances managing feature.
 
 **For many other features, see below [CLI usage](#cli-usage-and-other-features)**
@@ -92,7 +92,7 @@ sudo lnxrouter -i eth1 -o isp5  --no-dns  --dhcp-dns 1.1.1.1  -6 --dhcp-dns6 [26
 > In this case of usage, it's recommended to:
 > 
 > 1. Stop serving local DNS
-> 2. Tell clients which DNS to use (ISP5's DNS. Or, a safe public DNS, like above example)
+> 2. Tell clients which DNS to use ISP5's DNS. (Or, a safe public DNS, like above example)
 
 > Also, read *Notice 1*
 
@@ -138,7 +138,7 @@ sudo lnxrouter -i lxcbr5
 
 ### Transparent proxy
 
-All clients' Internet traffic go through, for example, Tor
+All clients' Internet traffic go through, for example, Tor (notice this example is NOT an anonymity use)
 
 <details>
 
@@ -155,6 +155,10 @@ TransPort [fd00:5:6:7::1]:9040
 DNSPort [fd00:5:6:7::1]:9053
 ```
 
+> **Warn**: Tor's anonymity relies on a purpose-made browser. Using Tor like this (sharing Tor's network to LAN clients) will NOT ensure anonymity.
+> 
+> Although we use Tor as example here, Linux-router does NOT ensure nor is NOT aiming at anonymity.
+
 </details>
 
 ### Clients-in-sandbox network
@@ -173,7 +177,7 @@ sudo lnxrouter -i eth1 \
 
 </details>
 
-> This script comes with no warrenty. Use on your own risk
+> Linux-router comes with no warranty. Use on your own risk
 
 ### Use as transparent proxy for LXD
 
@@ -317,25 +321,27 @@ Options:
     -d                      DNS server will take into account /etc/hosts
     -e <hosts_file>         DNS server will take into account additional 
                             hosts file
+    --dns-nocache           DNS server no cache
     
     --mac <MAC>             Set MAC address
     --random-mac            Use random MAC address
  
     --tp <port>             Transparent proxy,
-                            redirect non-LAN TCP and UDP traffic to port.
-                            (usually used with '--dns')
+                            redirect non-LAN TCP and UDP(not tested) traffic to
+                            port. (usually used with '--dns')
     
   WiFi hotspot options:
     --ap <wifi interface> <SSID>
                             Create WiFi access point
     -p, --password <password>   
                             WiFi password
-    --qr                    Show WiFi QR code in terminal
+    --qr                    Show WiFi QR code in terminal (need qrencode)
     
     --hidden                Hide access point (not broadcast SSID)
     --no-virt               Do not create virtual interface
                             Using this you can't use same wlan interface
                             for both Internet and AP
+    --virt-name <name>      Set name of virtual interface
     -c <channel>            Channel number (default: 1)
     --country <code>        Set two-letter country code for regularity
                             (example: US)
@@ -388,15 +394,25 @@ Options:
 
 ## What changes are done to Linux system
 
-On exit of a linux-router instance, script **will do cleanup**, i.e. undo most changes to system. Though, **some** changes will **not** be undone, which are:
+On exit of a linux-router instance, script **will do cleanup**, i.e. undo most changes to system. Though, **some** changes (if needed) will **not** be undone, which are:
 
 1. `/proc/sys/net/ipv4/ip_forward = 1` and `/proc/sys/net/ipv6/conf/all/forwarding = 1`
-2. dnsmasq (if used) in Apparmor complain mode
-3. hostapd (if used) in Apparmor complain mode
+2. dnsmasq in Apparmor complain mode
+3. hostapd in Apparmor complain mode
 4. Kernel module `nf_nat_pptp` loaded
 5. The wifi device which is used to create hotspot is `rfkill unblock`ed
 6. WiFi country code, if user assigns
 
+## Install
+
+1-file-script. Download and run (meet the dependencies).
+
+I'm currently not packaging for any distro. If you do, open a PR and add the link (can be with a version badge) to list here:
+
+| Linux distro |                                                                                                            |
+| ------------ | ---------------------------------------------------------------------------------------------------------- |
+| Any          | download [1-file-script](https://raw.githubusercontent.com/garywill/linux-router/master/lnxrouter) and run |
+
 ## Dependencies
 
 - bash
@@ -409,20 +425,18 @@ On exit of a linux-router instance, script **will do cleanup**, i.e. undo most c
   - iw
   - iwconfig (you only need this if 'iw' can not recognize your adapter)
   - haveged (optional)
-  - qrencode (optional)
 
 ## TODO
 
-<details>
+Sooner is better:
+- Detect firewalld and make sure it won't interfere our interface
 
-- Compatibility with firewalld
+Future:
 - WPA3
 - Global IPv6
 - Explictly ban forwarding if not needed
 - Bring bridging method back
 
-</details>
-
 ## License
 
 linux-router is LGPL licensed
@@ -486,7 +500,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 Visit [**my homepage** 🏡](https://garywill.github.io) to see **more tools and projects** 🛠️.
 
-> [❤️ Buy me a coffee](https://github.com/garywill/receiving/blob/master/receiving_methods.md) , this project took me lots of time! ([❤️ 扫个码打赏一个!](https://github.com/garywill/receiving/blob/master/receiving_methods.md))
+> [❤️ Buy me a coffee](https://github.com/garywill/receiving/blob/master/receiving_methods.md) , this project took me lots of time! ([❤️ 扫码领红包并打赏一个!](https://github.com/garywill/receiving/blob/master/receiving_methods.md))
 > 
 > 🥂 ( ^\_^) o自自o (^_^ ) 🍻
 

lnxrouter

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-VERSION=0.6.6
+VERSION=0.6.7
 PROGNAME="$(basename $0)"
 
 export LC_ALL=C
@@ -67,25 +67,27 @@ Options:
     -d                      DNS server will take into account /etc/hosts
     -e <hosts_file>         DNS server will take into account additional 
                             hosts file
+    --dns-nocache           DNS server no cache
     
     --mac <MAC>             Set MAC address
     --random-mac            Use random MAC address
  
     --tp <port>             Transparent proxy,
-                            redirect non-LAN TCP and UDP traffic to port.
-                            (usually used with '--dns')
+                            redirect non-LAN TCP and UDP(not tested) traffic to
+                            port. (usually used with '--dns')
     
   WiFi hotspot options:
     --ap <wifi interface> <SSID>
                             Create WiFi access point
     -p, --password <password>   
                             WiFi password
-    --qr                    Show WiFi QR code in terminal
+    --qr                    Show WiFi QR code in terminal (need qrencode)
     
     --hidden                Hide access point (not broadcast SSID)
     --no-virt               Do not create virtual interface
                             Using this you can't use same wlan interface
                             for both Internet and AP
+    --virt-name <name>      Set name of virtual interface
     -c <channel>            Channel number (default: 1)
     --country <code>        Set two-letter country code for regularity
                             (example: US)
@@ -156,6 +158,7 @@ define_global_variables(){
     SHOW_DNS_QUERY=0  # log dns
     ETC_HOSTS=0
     ADDN_HOSTS=
+    DNS_NOCACHE=
     CONN_IFACE=    # which interface user choose to use to create network
     INTERNET_IFACE= # which interface to get Internet from
     THISHOSTNAME=   # this host's name the DNS tells clients 
@@ -195,6 +198,7 @@ define_global_variables(){
     
     # script variables
     VWIFI_IFACE=  # virtual wifi interface name, if created
+    VIRT_NAME= # name to use for virtual interface if --virt-name is used
     AP_IFACE=     # can be VWIFI_IFACE or WIFI_IFACE
     USE_IWCONFIG=0  # some device can't use iw
     
@@ -322,6 +326,10 @@ parse_user_options(){
                 ADDN_HOSTS="$1"
                 shift
                 ;;
+            --dns-nocache)
+                shift
+                DNS_NOCACHE=1
+                ;;
             
             --isolate-clients)
                 shift
@@ -399,6 +407,11 @@ parse_user_options(){
                 shift
                 NO_VIRT=1
                 ;;
+            --virt-name)
+                shift
+                VIRT_NAME="$1"
+                shift
+                ;;
 
             --country)
                 shift
@@ -505,6 +518,10 @@ is_interface() {
     [[ -d "/sys/class/net/${1}" ]]
 }
 
+is_vface_name_allocated(){
+    is_interface "$1" || [[ -f "$COMMON_CONFDIR/vfaces/${1}" ]]
+}
+
 get_interface_phy_device() { # only for wifi interface
     local x
     for x in /sys/class/ieee80211/*; do
@@ -626,19 +643,44 @@ get_interface_mac() {
     cat "/sys/class/net/${1}/address"
 }
 
+get_interface_pci_info() {  # pci id / model / virtual
+    is_interface "$1" || return
+    
+    local device_path
+    local pci_id
+    local pci_full
+    
+    device_path="$(readlink -f /sys/class/net/$1)"
+    
+    if [[ "$device_path" == "/sys/devices/pci"* ]]; then
+        pci_id="$(echo $device_path | sed 's/\//\n/g' | tail -n 3 |sed -n 1p)"
+        
+        if which lspci >/dev/null 2>&1 ; then
+            pci_full="$( lspci -D -nn | grep -E "^$pci_id " )"
+            echo "  PCI: $pci_full"
+        else
+            echo "  PCI: $pci_id"
+        fi
+    elif [[ "$device_path" == *"/virtual/"* ]]; then
+        echo "  virtual interface"
+    fi
+    # TODO usb
+    # TODO current driver
+}
+
 alloc_new_vface_name() { # only for wifi
     local i=0
-    local v_iface_name=
+    local v_iface_name="$VIRT_NAME"
+    if [[ -z $VIRT_NAME ]]; then
         while :; do
             v_iface_name="x$i${WIFI_IFACE}"
-        if ! is_interface ${v_iface_name} && [[ ! -f $COMMON_CONFDIR/vfaces/${v_iface_name} ]]; then
+            i=$((i + 1))
+            is_vface_name_allocated ${v_iface_name} || break
+        done
+    fi
     mkdir -p $COMMON_CONFDIR/vfaces
     touch $COMMON_CONFDIR/vfaces/${v_iface_name}
     echo "${v_iface_name}"
-            return
-        fi
-        i=$((i + 1))
-    done
 }
 
 dealloc_vface_name() {
@@ -995,7 +1037,7 @@ allow_dhcp() {
 # TODO: use 'DNAT' instead of '--to-ports' to support other IP
 start_redsocks() {
     echo
-    echo "iptables: transparent proxy non-LAN TCP/UDP traffic to port ${TP_PORT}"
+    echo "iptables: transparent proxy non-LAN TCP and UDP(not tested) traffic to port ${TP_PORT}"
     if [[ $NO4 -eq 0 ]]; then
         iptb 4 n nat N lrt${$}${SUBNET_IFACE}-TP || die
         iptb 4 n nat A lrt${$}${SUBNET_IFACE}-TP -d 0.0.0.0/8 -j RETURN || die
@@ -1158,7 +1200,7 @@ _cleanup() {
 }
 
 clean_iptables() {
-    bash $CONFDIR/undo_iptables.sh
+    [[ -f $CONFDIR/undo_iptables.sh ]] && bash $CONFDIR/undo_iptables.sh
     
     [[ -f $CONFDIR/undo_iptables_2.sh ]] && bash $CONFDIR/undo_iptables_2.sh
 }
@@ -1173,15 +1215,15 @@ cleanup() {
     clean_iptables > /dev/null
     _cleanup 2> /dev/null
     
-    pgid=$(ps opgid= $$ |awk '{print $1}' )
-    echo "Killing PGID $pgid ..."
-    kill -15 -$pgid
-    sleep 1 
+    #pgid=$(ps opgid= $$ |awk '{print $1}' )
+    #echo "Killing PGID $pgid ..."
+    #kill -15 -$pgid
+    #sleep 1 
     echo "Cleaning up done"
     #kill -9 -$pgid
 }
 
-# NOTE function die() is designed not to be used before init_trap() executed
+# NOTE function die() is designed NOT to be used before init_trap() executed
 die() { # SIGUSR2
     echo "Error occured"
     [[ -n "$1" ]] && echo -e "\nERROR: $1\n" >&2
@@ -1543,6 +1585,18 @@ check_wifi_settings() {
         fi
         echo "WARN: If AP doesn't work, read https://github.com/oblique/create_ap/blob/master/howto/realtek.md" >&2
     fi
+
+    if [[ -z $VIRT_NAME ]]; then
+        if [[ ${#WIFI_IFACE} -gt 13 ]]; then
+            echo "WARN: $WIFI_IFACE has ${#WIFI_IFACE} characters which might be too long. If AP doesn't work, see --virt-name and https://github.com/garywill/linux-router/issues/44" >&2
+        fi
+    elif [[ ${#VIRT_NAME} -gt 15 ]]; then
+        echo "WARN: option --virt-name $VIRT_NAME has ${#VIRT_NAME} characters which might be too long, consider making it shorter in case of errors" >&2
+    fi
+
+    if [[ ! -z $VIRT_NAME ]] && is_vface_name_allocated $VIRT_NAME; then
+      echo "WARN: interface $VIRT_NAME aleady exists, this will cause an error"
+    fi
 }
 
 check_if_new_mac_valid() {
@@ -1620,8 +1674,14 @@ prepare_wifi_interface() {
             echo "${VWIFI_IFACE} created"
         else
             VWIFI_IFACE=
+            if [[ ! -z ${VIRT_NAME} ]] && [[ ${#VIRT_NAME} -gt 15 ]]; then
+              die "Failed creating virtual WiFi interface. This is likely because you have set a long name for your virtual interface using --virt-name, try making it shorter'"
+            elif [[ -z ${VIRT_NAME} ]] && [[ ${#WIFI_IFACE} -gt 13 ]]; then
+              die "Failed creating virtual WiFi interface. This is likely because your interface name is too long. Try using '--virt-name <shorter interface name>'"
+            else
               die "Failed creating virtual WiFi interface. Maybe your WiFi adapter does not fully support virtual interfaces. Try again with '--no-virt'"
             fi
+        fi
         
         AP_IFACE=${VWIFI_IFACE}
     else # no virtual wifi interface, use wifi device interface itself
@@ -1796,6 +1856,10 @@ write_dnsmasq_conf() {
 			no-poll
 		EOF
     fi
+    if [[ $DNS_NOCACHE -eq 1 ]]; then
+        echo "cache-size=0" >> "$CONFDIR/dnsmasq.conf"
+        echo "no-negcache" >> "$CONFDIR/dnsmasq.conf"
+    fi
     if [[ $IPV6 -eq 1 ]];then
         cat <<- EOF  >> "$CONFDIR/dnsmasq.conf"
 			listen-address=${GATEWAY6}
@@ -1928,8 +1992,7 @@ echo
 echo "PID: $$"
 
 TARGET_IFACE="$(decide_target_interface)" || exit 1 # judge wired (-i CONN_IFACE) or wireless hotspot (--ap $WIFI_IFACE)
-echo "Target interface is ${TARGET_IFACE} ($(get_interface_mac $TARGET_IFACE))"
-# TODO: show interface type, device model and pci/usb id (hwdata  pci.ids), current driver
+echo "Target interface is ${TARGET_IFACE} ($(get_interface_mac $TARGET_IFACE)) $(get_interface_pci_info $TARGET_IFACE)"
 
 if [[ "$MAC_USE_RANDOM" -eq 1 ]] ; then
     NEW_MACADDR="$(generate_random_mac)"
@@ -2065,7 +2128,7 @@ fi
 [[ $NO_DNSMASQ -eq 0 ]] && ( allow_dhcp ; start_dnsmasq )
 
 echo 
-echo "== Setting up completed, now linux-router is working =="
+echo "== Setting up completed, now linux-router should be working =="
 
 #============================================================
 #============================================================