158 lines
3.4 KiB
Bash
Executable file
158 lines
3.4 KiB
Bash
Executable file
#!/bin/sh
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set -e
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# Copyright (C) 2012, 2020 Natanael Copa <ncopa@alpinelinux.org>
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# Copyright (C) 2020 Ariadne Conill <ariadne@dereferenced.org>
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# Copyright (C) 2020 Maximilian Wilhelm <max@sdn.clinic>
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#
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# Permission to use, copy, modify, and/or distribute this software for any
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# purpose with or without fee is hereby granted, provided that the above
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# copyright notice and this permission notice appear in all copies.
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#
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# This software is provided 'as is' and without any warranty, express or
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# implied. In no event shall the authors be liable for any damages arising
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# from the use of this software.
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all_ports_exist() {
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local i=
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for i in "$@"; do
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[ -d /sys/class/net/$i ] || return 1
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done
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return 0
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}
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wait_ports() {
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local timeout= waitports=
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[ -z "$IF_BRIDGE_WAITPORT" ] && return 0
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set -- $IF_BRIDGE_WAITPORT
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timeout="$1"
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shift
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waitports="$@"
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[ -z "$waitports" ] && waitports="$PORTS"
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while ! all_ports_exist $waitports; do
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[ "$timeout" -eq 0 ] && return 0
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timeout=$(($timeout - 1))
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sleep 1
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done
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}
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all_ports() {
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local i=
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for i in /sys/class/net/*/ifindex; do
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i=${i%/*}
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i=${i##*/}
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case "$i" in
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lo|$IFACE) continue;;
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*) echo $i;;
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esac
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done
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}
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add_ports() {
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local port=
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for port in $PORTS; do
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if [ -x /etc/network/if-pre-up.d/vlan ]; then
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env IFACE=$port /etc/network/if-pre-up.d/vlan
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fi
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if [ -n "$IF_BRIDGE_HW" ]; then
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ip link set dev $port addr $IF_BRIDGE_HW
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fi
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brctl addif $IFACE $port && ip link set dev $port up
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done
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}
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del_ports() {
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local port=
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for port in $PORTS; do
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ip link set dev $port down
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brctl delif $IFACE $port
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if [ -x /etc/network/ip-post-down.d/vlan ]; then
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env IFACE=$port /etc/network/if-post-down.d/vlan
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fi
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done
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}
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set_bridge_opts() {
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[ -n "$IF_BRIDGE_AGEING" ] \
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&& brctl setageing $IFACE $IF_BRIDGE_AGEING
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[ -n "$IF_BRIDGE_BRIDGEPRIO" ] \
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&& brctl setbridgeprio $IFACE $IF_BRIDGE_BRIDGEPRIO
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[ -n "$IF_BRIDGE_FD" ] \
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&& brctl setfd $IFACE $IF_BRIDGE_FD
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[ -n "$IF_BRIDGE_GCINT" ] \
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&& brctl setgcint $IFACE $IF_BRIDGE_GCINT
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[ -n "$IF_BRIDGE_HELLO" ] \
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&& brctl sethello $IFACE $IF_BRIDGE_HELLO
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[ -n "$IF_BRIDGE_MAXAGE" ] \
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&& brctl setmaxage $IFACE $IF_BRIDGE_MAXAGE
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[ -n "$IF_BRIDGE_PATHCOST" ] \
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&& brctl setpathcost $IFACE $IF_BRIDGE_PATHCOST
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[ -n "$IF_BRIDGE_PORTPRIO" ] \
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&& brctl setportprio $IFACE $IF_BRIDGE_PORTPRIO
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[ -n "$IF_BRIDGE_STP" ] \
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&& brctl stp $IFACE $IF_BRIDGE_STP
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}
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all_ports_ready() {
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local port=
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for port in $PORTS; do
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case $(cat /sys/class/net/$IFACE/brif/$port/state) in
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""|0|3) ;; # 0 = disabled, 3 = forwarding
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[12]) return 1;;
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esac
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done
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return 0
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}
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find_maxwait() {
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awk '{printf("%.f\n", 2 * $0 / 100); }' \
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/sys/class/net/$IFACE/bridge/forward_delay
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}
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wait_bridge() {
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local timeout=$IF_BRIDGE_MAXWAIT
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if [ -z "$timeout" ]; then
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timeout=$(find_maxwait)
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fi
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ip link set dev $IFACE up
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while ! all_ports_ready; do
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[ $timeout -eq 0 ] && break
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timeout=$(($timeout - 1))
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sleep 1
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done
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}
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[ -z "$IF_BRIDGE_PORTS" ] && IF_BRIDGE_PORTS="$IF_REQUIRES"
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case "$IF_BRIDGE_PORTS" in
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"") ;;
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none) PORTS="";;
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all) PORTS=$(all_ports);;
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*) PORTS="$IF_BRIDGE_PORTS";;
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esac
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[ -z "$PORTS" ] && ! env | grep -q "^IF_BRIDGE" && exit
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case "$PHASE" in
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create)
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if [ ! -d "/sys/class/net/${IFACE}" ]; then
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brctl addbr "${IFACE}"
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fi
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;;
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pre-up)
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wait_ports
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set_bridge_opts
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add_ports
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wait_bridge
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;;
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post-down)
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del_ports
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ip link set dev $IFACE down
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;;
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destroy)
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if [ -d "/sys/class/net/${IFACE}" ]; then
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brctl delbr "${IFACE}"
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fi
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;;
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esac
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