Add bridge setup script

Signed-off-by: Ethan Dye <[email protected]>

.github/workflows/test-action.yml

@@ -31,15 +31,7 @@ jobs:
            sudo add-apt-repository ppa:canonical-server/server-backports
            sudo apt-get update
            sudo apt-get install --yes gnupg xz-utils expect systemd-container qemu-user-static qemu-utils qemu-system-arm libfdt-dev isc-dhcp-client iproute2
-           sudo ip link add name br0 type bridge
-           sudo ip link set eth0 master br0
-           sudo ip tuntap add tap0 mode tap
-           sudo ip link set tap0 master br0
-           sudo ip link set up dev eth0
-           sudo ip link set up dev tap0
-           sudo ip link set up dev br0
-           sudo dhclient -v br0
-           sudo ip addr flush dev eth0
+           sudo ./tests/bridge.bash
            echo "imagexz=$(basename "$(curl "https://downloads.raspberrypi.org/raspios_lite_armhf_latest" -s -L -I  -o /dev/null -w '%{url_effective}')")" >> $GITHUB_OUTPUT
            echo "image=$(echo "$(basename "$(curl "https://downloads.raspberrypi.org/raspios_lite_armhf_latest" -s -L -I  -o /dev/null -w '%{url_effective}')")" | sed -e 's/.xz//')" >> $GITHUB_OUTPUT
        - name: Cache Raspberry Pi OS 32bit image

tests/bridge.bash

@@ -0,0 +1,43 @@
+#!/usr/bin/env bash
+
+if [[ $EUID != 0 ]]
+  then echo "Run this script as root"
+  exit
+fi
+
+BRIDGE="br0"
+TAP="tap0"
+INTERFACE="eth0"
+
+echo "Adding bridge $BRIDGE"
+ip link add name $BRIDGE type bridge
+
+echo "Flushing interface $INTERFACE"
+ip addr flush dev $INTERFACE
+
+echo "Setting $BRIDGE as master of $INTERFACE"
+ip link set $INTERFACE master $BRIDGE
+
+echo "Adding tap $TAP"
+ip tuntap add $TAP mode tap
+
+echo "Setting $BRIDGE as master of $TAP"
+ip link set $TAP master $BRIDGE
+
+echo "Setting $INTERFACE, $BRIDGE and $TAP up"
+ip link set up dev $INTERFACE
+ip link set up dev $TAP
+ip link set up dev $BRIDGE
+
+echo "Stopping NetworkManager"
+systemctl stop NetworkManager
+
+echo "Requesting ip for $BRIDGE"
+
+if dhclient $BRIDGE; then
+    echo "Requesting ip for $INTERFACE"
+    dhclient $INTERFACE
+    echo "Killing dhclient and starting NetworkManager"
+    pkill -9 dhclient
+    systemctl start NetworkManager
+fi