ACC SHELL

#!/bin/bash
#
# Copyright (c) 2005-2008 SUSE LINUX Products GmbH Nuernberg, Germany.
# All rights reserved.
#
# Author: 
#    Stefan Scheler <sscheler@suse.de> 
#    Marius Tomaschewski <mt@suse.de>
#
# Based on a patch by:
#    Jan Engelhardt <jengelh@linux01.gwdg.de>
#
# $Id$
#

unset POSIXLY_CORRECT ; set +o posix # we're using non-posix bash features

usage () {
	echo $@
	echo "usage: if{up,down,status}-bridge [<config>] <interface> [-o <options>]"
	echo ""
	echo "Options are:"
	echo "    [on]boot : we are currently booting (or shutting down)"
	echo "    auto     : alias for boot"
	echo "    hotplug  : we are handling a hotplug event"
	echo "    debug    : be verbose"
	exit $R_USAGE
}

######################################################################
# change the working direcory and source some common files
#
R_INTERNAL=1      # internal error, e.g. no config or missing scripts
cd /etc/sysconfig/network || exit $R_INTERNAL
test -f ./config && . ./config
test -f scripts/functions && . scripts/functions || exit $R_INTERNAL

######################################################################
# check arguments and how we are called (in case of links)
#
SCRIPTNAME=${0##*/}
debug $*
ACTION=${SCRIPTNAME#if}
ACTION=${ACTION%%-bridge}
case "${ACTION}" in
	up|status|down) ;;
	*) usage
esac
case "$1" in ""|-h|*help*) usage; esac
CONFIG=$1
shift
if [ -n "$1" -a "$1" != "-o" ] ; then
	INTERFACE=$1
else
	INTERFACE=$CONFIG
fi
shift
test "$1" = "-o" && shift
OPTIONS="$@"
MODE=manual
while [ $# -gt 0 ]; do
	case $1 in
		boot|onboot) MODE=auto ;;
		hotplug)     MODE=auto ;;
		auto)        MODE=auto ;;
		quiet)       be_quiet_has_gone ;;
		debug)       DEBUG=yes ;;
		*)           debug unknown option $1 ;;
	esac
	shift
done

######################################################################
# Check needed tools
#
if ! [ -x /sbin/brctl ]; then
	err_mesg "bridge-utils not installed"
	exit $R_INTERNAL
fi

######################################################################
# check presence of configuration file and source it
#
test -f ./ifcfg-$CONFIG && . ./ifcfg-$CONFIG

######################################################################
# global variables
#
SYSFS="/sys/class/net"

######################################################################
case $ACTION in
up)

	######################################################################
	# Bridge setup
	#
	printf "    %-9s " "$INTERFACE"

	# Add bridge
	if test -d $SYSFS/$INTERFACE/ ; then
		if test -d $SYSFS/$INTERFACE/bridge ; then
			err_mesg "Warning: Bridge $INTERFACE already exists!"
			printf "    %-9s " "$INTERFACE"
		else
			err_mesg "Error: Interface $INTERFACE exists and is not a bridge!"
			exit $R_ERROR
		fi
	else
		MESSAGE=`brctl addbr "$INTERFACE"`
		if [ $? -ne 0 ]; then
			err_mesg "Error: Failed to create bridge $INTERFACE: $MESSAGE"
			exit $R_ERROR
		fi
	fi

	# Add ports
	printf "Ports: "
	for PORT_INTERFACE in $(ls -1 $SYSFS/$INTERFACE/brif/ 2>/dev/null) ; do
		printf "<${PORT_INTERFACE}> "
	done
	SHOW=1
	COUNTER=0
	BRIFINDEX=`cat $SYSFS/$INTERFACE/ifindex`
	for PORT_INTERFACE in $BRIDGE_PORTS; do
		test $SHOW -eq 2 && printf "    %-9s Ports:" "$INTERFACE"
		SHOW=1
		# add port to bridge
		if test -d $SYSFS/$PORT_INTERFACE/ -a \
			-d $SYSFS/$PORT_INTERFACE/brport/bridge ; then
			INDEX=`cat $SYSFS/$PORT_INTERFACE/brport/bridge/ifindex`
			if test $((INDEX)) -ne $((BRIFINDEX)) ; then
				printf "\n    %-9s " "$INTERFACE"
				err_mesg " Error: Port $PORT_INTERFACE is member of another bridge"
				exit $R_ERROR
			fi
			# else ok, port already in this bridge
			if ! is_iface_up $PORT_INTERFACE ; then
				ip link set dev "$PORT_INTERFACE" up
			fi
			SHOW=0
		else
			MESSAGE=`ip link set dev "$PORT_INTERFACE" up 2>&1 && brctl addif "$INTERFACE" "$PORT_INTERFACE" 2>&1`
			if [ $? -ne 0 ]; then
				printf "\n    %-9s " "$INTERFACE"
				err_mesg "Warning: failed to add port $PORT_INTERFACE: $MESSAGE"
				SHOW=2
				COUNTER=$((COUNTER+1))
				continue
			fi
		fi

		# set path costs
		if [ -n "$BRIDGE_PATHCOSTS" ]; then
			COSTS=(${BRIDGE_PATHCOSTS})
			if test -n "${COSTS[$COUNTER]}" ; then
				brctl setpathcost $INTERFACE $PORT_INTERFACE ${COSTS[$COUNTER]}
			fi
		fi
		# set port prio
		if [ -n "$BRIDGE_PORTPRIORITIES" ]; then
			PRIOS=(${BRIDGE_PORTPRIORITIES})
			if test -n "${PRIOS[$COUNTER]}" ; then
				brctl setportprio $INTERFACE $PORT_INTERFACE ${PRIOS[$COUNTER]}
			fi
		fi

		test $SHOW -eq 1 && printf "[$PORT_INTERFACE] "
		COUNTER=$((COUNTER+1))
	done
	test $SHOW -lt 2 && printf "\n"

	# Set flags
	[ -n "$BRIDGE_AGEINGTIME"   ] && brctl setageing     "$INTERFACE" "$BRIDGE_AGEINGTIME"
	[ -n "$BRIDGE_STP"          ] && brctl stp           "$INTERFACE" "$BRIDGE_STP"
	[ -n "$BRIDGE_PRIORITY"     ] && brctl setbridgeprio "$INTERFACE" "$BRIDGE_PRIORITY"
	[ -n "$BRIDGE_FORWARDDELAY" ] && brctl setfd         "$INTERFACE" "$BRIDGE_FORWARDDELAY"
	[ -n "$BRIDGE_HELLOTIME"    ] && brctl sethello      "$INTERFACE" "$BRIDGE_HELLOTIME"
	[ -n "$BRIDGE_MAXAGE"       ] && brctl setmaxage     "$INTERFACE" "$BRIDGE_MAXAGE"

	ip link set up dev $INTERFACE
	typeset -i N=-300
	typeset -i NMAX
	typeset -i EMPTY=0
	typeset -i STATE=0
	typeset -i S

	mesg_n "`printf "    %-9s forwarddelay (see man ifcfg-bridge) " $INTERFACE`"
	read -t 1 NMAX < $SYSFS/$INTERFACE/bridge/forward_delay
	while (((N+=1) < NMAX)) ; do
		let STATE=0
		for bp in $SYSFS/$INTERFACE/brif/* ; do
			test -e "$bp" || break 2
			let EMPTY++
			sf="$SYSFS/$INTERFACE/brif/${bp##*/}/state"
			test -e $sf || continue
			read -t 1 S < $sf
			if ((S == 2 )) ; then
				let STATE=-1
				break
			fi
			let STATE+=S
		done
		((STATE > 0)) && break
		# make a dot every 2nd second
		((N%200 == 1)) && mesg_n "."
		usleep 10000
	done
	if test $EMPTY -eq 0 ; then
		mesg "- no ports in bridge."
	else
		test "$STATE" -gt 0    \
			&& mesg "... ready" \
			|| mesg " not ready. Proceeding in background."
	fi
	RETVAL=$R_SUCCESS
	;;
down)

	######################################################################
	# Bridge shutdown
	#
	if test -d $SYSFS/$INTERFACE/bridge ; then
		MESSAGE=`brctl delbr "$INTERFACE"`
		if [ $? -ne 0 ]; then
			err_mesg "Error: failed to delete bridge $INTERFACE: $MESSAGE"
			exit $R_STATUS
		fi
		for PORT_INTERFACE in $BRIDGE_PORTS \
			$(ls -1 $SYSFS/$INTERFACE/brif/ 2>/dev/null)
		do
			test -d $SYSFS/$PORT_INTERFACE || continue
			MESSAGE=`ip link set dev "$PORT_INTERFACE" down`
			if [ $? -ne 0 ]; then
				err_mesg "Warning: failed to bring $PORT_INTERFACE down: $MESSAGE"
			fi
		done
	fi
	RETVAL=$R_SUCCESS
	;;
status)

	######################################################################
	# Bridge status
	#
	if is_iface_up $INTERFACE ; then
	    # do not show status output on boot, this may log
	    # the WEP key in the boot log
	    if [ "$MODE" != onboot ]; then
			brctl show $INTERFACE
			brctl showstp $INTERFACE
		fi
	    RETVAL=$R_SUCCESS
	else
	    RETVAL=$R_NOTRUNNING
	fi
	;;
esac

exit $RETVAL