#!/bin/sh
# Execute only if the interface has a bridge_ports property (this characterizes bridge interfaces)
case "$IF_BRIDGE_PORTS" in
    "")
        exit 0
        ;;
    none)
        INTERFACES=""
        ;;
    *)
        INTERFACES="$IF_BRIDGE_PORTS"
        ;;
esac

if [ "$MODE" = "start" ] && [ ! -d /sys/class/net/$IFACE ]; then
	# Create the bridge interface using brctl
	brctl addbr $IFACE || exit 1

	# Wait for wlan0 to be ready
	sleep 0.5

	# For all the interfaces in bridge ports, attach to the bridge and remove ip
	for port in $INTERFACES; do
		brctl addif $IFACE $port && ifconfig $port 0.0.0.0 up
	done

	# Setup the bridge (only options supported by busybox)
	[ -n "$IF_BRIDEG_AGEING" ] && brctl setageing $IFACE $IF_BRIDGE_AGEING
	[ -n "$IF_BRIDGE_BRIDGEPRIO" ] && brctl setbridgeprio $IFACE $IF_BRIDGE_BRIDGEPRIO
	[ -n "$IF_BRIDGE_FD" ] && brctl setfd $IFACE $IF_BRIDGE_FD
	[ -n "$IF_BRIDGE_HELLO" ] && brctl sethello $IFACE $IF_BRIDGE_HELLO
	[ -n "$IF_BRIDGE_MAXAGE" ] && brctl setmaxage $IFACE $IF_BRIDGE_MAXAGE
	[ -n "$IF_BRIDGE_PATHCOST" ] && brctl setpathcost $IFACE $IF_BRIDGE_PATHCOST
	[ -n "$IF_BRIDGE_PORTPRIO" ] && brctl setportprio $IFACE $IF_BRIDGE_PORTPRIO
	[ -n "$IF_BRIDGE_STP" ] && brctl stp $IFACE $IF_BRIDGE_STP

	# Activate the bridge
	ifconfig $IFACE 0.0.0.0 up

elif [ "$MODE" = "stop" ];  then
	# Bring down the interface
	ifconfig $IFACE down || exit 1

	# Remove port interfaces from the bridge
	for port in $INTERFACES; do
		ifconfig $port down && brctl delif $IFACE $port
	done

	# Destroy the interface
	brctl delbr $IFACE
fi