An init.d script for starting an etherchannel interface

net.bond0 (text/plain), 4.07 KB, created by Shevek on 2003-04-05 09:25:56 UTC

#!/sbin/runscript
# Copyright 1999-2002 Gentoo Technologies, Inc.
# Distributed under the terms of the GNU General Public License v2
# $Header: /home/cvsroot/gentoo-src/rc-scripts/init.d/net.eth0,v 1.23 2002/11/26 12:32:28 azarah Exp $

#NB: Config is in /etc/conf.d/net


# For pcmcia users. note that pcmcia must be added to the same
# runlevel as the net.* script that needs it.
depend() {
	use pcmcia
}

checkconfig() {
	if [ -z "$(eval echo \$\{iface_${IFACE}\})" ]
	then
		eerror "Please make sure that /etc/conf.d/net has \$iface_$IFACE set"
		return 1
	fi
	if [ "$(eval echo \$\{iface_${IFACE}\})" = "dhcp" ]
	then
		eerror "Cannot use DHCP on etherchannel interface $IFACE in /etc/conf.d/net"
		return 1
	fi
	if [ -z "$(eval echo \$\{hw_${IFACE}\})" ]
	then
		eerror "Please make sure that /etc/conf.d/net has \$hw_$IFACE set"
		return 1
	fi
}

start() {
	checkconfig || return 1
	local iface_args="$(eval echo \$\{iface_${IFACE}\})"
	local hw_args="$(eval echo \$\{hw_${IFACE}\})"
	local retval=0
	ebegin "Bringing ${IFACE} up"

	/sbin/ifconfig ${IFACE} ${iface_args} >/dev/null || {
		retval=$?
		eend ${retval} "Failed to bring ${IFACE} up"
		return ${retval}
	}
	# ifconfig do not always return failure ..
	/sbin/ifconfig ${IFACE} &> /dev/null || {
		retval=$?
		eend ${retval} "Failed to bring ${IFACE} up"
		return ${retval}
	}

	/sbin/ifenslave ${IFACE} ${hw_args} &> /dev/null || {
		retval=$?
		eend ${retval} "Failed to enslave ${hw_args} to ${IFACE}"
		return ${retval}
	}

	eend 0

	# Shevek: I didn't touch this bit. I don't use it. Worth checking.
	if [ -n "$(eval echo \$\{alias_${IFACE}\})" ]
	then
		local x=""
		local num=0
		local aliasbcast=""
		local aliasnmask=""

		ebegin "  Adding aliases"
		for x in $(eval echo \$\{alias_${IFACE}\})
		do
			aliasbcast="$(eval echo \$\{broadcast_${IFACE}\} \| awk \'\{ print \$$((num + 1)) \}\')"
			if [ -n "${aliasbcast}" ]
			then
				aliasbcast="broadcast ${aliasbcast}"
			fi

			aliasnmask="$(eval echo \$\{netmask_${IFACE}\} \| awk \'\{ print \$$((num + 1)) \}\')"
			if [ -n "${aliasnmask}" ]
			then
				aliasnmask="netmask ${aliasnmask}"
			fi
		
			ebegin "    ${IFACE}:${num}"
			/sbin/ifconfig ${IFACE}:${num} ${x} \
				${aliasbcast} ${aliasnmask} >/dev/null
			num=$((num + 1))
			eend 0
		done
		save_options "alias" "$(eval echo \$\{alias_${IFACE}\})"
	fi

	if [ -n "$(eval echo \$\{inet6_${IFACE}\})" ]
	then
		local x=""
		ebegin "  Adding inet6 addresses"
		for x in $(eval echo \$\{inet6_${IFACE}\})
		do
			ebegin "    ${IFACE} inet6 add ${x}"
			/sbin/ifconfig ${IFACE} inet6 add ${x} >/dev/null
			eend 0
		done
		save_options "inet6" "$(eval echo \$\{inet6_${IFACE}\})"
	fi

	# Shevek: This bit should still work!
	if [ -n "${gateway}" ] && [ "${gateway%/*}" = "${IFACE}" ]
	then
		ebegin "  Setting default gateway"
		/sbin/route add default gw ${gateway#*/} dev ${gateway%/*} \
			netmask 0.0.0.0 metric 1 >/dev/null || {
			
			local error=$?
			ifconfig ${IFACE} down &>/dev/null
			eend ${error} "Failed to bring ${IFACE} up"
			stop
			return ${error}
		}
		eend 0
	fi

	# Enabling rp_filter causes wacky packets to be auto-dropped by
	# the kernel
	if [ -e /proc/sys/net/ipv4/conf/${IFACE}/rp_filter ]
	then
		echo 1 > /proc/sys/net/ipv4/conf/${IFACE}/rp_filter
	fi
}

stop() {
	local myalias="$(get_options alias)"
	ebegin "Bringing ${IFACE} down"

	# Also down the inet6 interfaces
	local myinet6="$(get_options inet6)"
	if [ -n "${myinet6}" ]
	then
		local x=""
		for x in ${myinet6}
		do
			/sbin/ifconfig ${IFACE} inet6 del ${x} >/dev/null
		done
	fi
	
	# Do some cleanup in case the amount of aliases change
	if [ -n "${myalias}" ]
	then
		local x=""
		local num=0
		for x in ${myalias}
		do
			/sbin/ifconfig ${IFACE}:${num} down >/dev/null
			num=$((num + 1))
		done
	fi

	if [ "$(eval echo \$\{iface_${IFACE}\})" = "dhcp" ]
	then
		/sbin/dhcpcd -k ${IFACE} &>/dev/null
	
		# Give dhcpcd time to properly shutdown
		local count=0
		einfon "  Waiting for dhcpcd to shutdown"
		while [ "${count}" -lt 5 ]
		do
			echo -n "."
			sleep 1
			count=$((count + 1))
		done
		echo "done"
	else
		/sbin/ifconfig ${IFACE} down >/dev/null
	fi
	eend 0
}


# vim:ts=4