#!/sbin/runscript
# Copyright 1999-2003 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 1.28 2003/03/16 08:03:19 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 hotplug pcmcia
}

checkconfig() {
	if [ -z "${iface_IFACE}" ]
	then
		eerror "Please make sure that /etc/conf.d/net has \$iface_$IFACE set"
		return 1
	fi
}

setup_env() {
	# No reason to check these multiple times in the file
	iface_IFACE="$(eval echo \$\{iface_${IFACE}\})"
	dhcpcd_IFACE="$(eval echo \$\{dhcpcd_${IFACE}\})"
	inet6_IFACE="$(eval echo \$\{inet6_${IFACE}\})"
	alias_IFACE="$(eval echo \$\{alias_${IFACE}\})"
	status_IFACE="$(ifconfig | gawk -v IFACE="${IFACE}" '/Link/ { if ($1 == IFACE) print "up" }')"
}

start() {
	local retval=0

	setup_env
	checkconfig || return 1
	
	ebegin "Bringing ${IFACE} up"

	if check_link_down ${IFACE}; then
		eend 1 "Failed; no link present.  Check cable?"
	else

		if [ "${iface_IFACE}" != "dhcp" ]
		then
			/sbin/ifconfig ${IFACE} ${iface_IFACE} >/dev/null || {
				retval=$?
				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 ${retval}
			}
		else
			# Check that eth0 was not brough up by the kernel ...
			if [ "${status_IFACE}" != "up" ]
			then
				/sbin/dhcpcd ${dhcpcd_IFACE} ${IFACE} >/dev/null || {
					retval=$?
					eend ${retval} "Failed to bring ${IFACE} up"
					return ${retval}
				}
			fi
		fi
		eend 0

		if [ -n "${alias_IFACE}" ]
		then
			local x=""
			local num=0
			local aliasbcast=""
			local aliasnmask=""

			ebegin "  Adding aliases"
			for x in ${alias_IFACE}
			do
				aliasbcast="$(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" "${alias_IFACE}"
		fi

		if [ -n "${inet6_IFACE}" ]
		then
			local x=""
			ebegin "  Adding inet6 addresses"
			for x in ${inet6_IFACE}
			do
				ebegin "    ${IFACE} inet6 add ${x}"
				/sbin/ifconfig ${IFACE} inet6 add ${x} >/dev/null
				eend 0
			done
			save_options "inet6" "${inet6_IFACE}"
		fi
		
		if [ -n "${gateway}" ] && [ "${gateway%/*}" = "${IFACE}" ]
		then
			ebegin "  Setting default gateway"
			# First delete any existing routes if it was setup by kernel ..
			/sbin/route del default dev ${gateway%/*} &>/dev/null
			/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
	fi
}

stop() {
	local myalias="$(get_options alias)"
	local myinet6="$(get_options inet6)"

	setup_env

	ebegin "Bringing ${IFACE} down"

	# Also down the inet6 interfaces
	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 [ "${iface_IFACE}" = "dhcp" ]
	then
		local count=0
		while /sbin/dhcpcd -k ${IFACE} &>/dev/null && [ "${count}" -lt 9 ]
		do
			# Give dhcpcd time to properly shutdown
			sleep 1
			count=$((count + 1))
		done
		if [ "${count}" -ge 9 ]
		then
			eerror "Timed out trying to stop dhcpcd"
		fi
	else
		/sbin/ifconfig ${IFACE} down >/dev/null
	fi
	eend 0
}


# From Mandrake-RedHat, modified by Leo
check_link_down ()
{
	if [ -x /sbin/mii-tool ]; then
		# wait for link to come up
		sleep 2
		/sbin/mii-tool $1 >/dev/null 2>&1 || return 1
		output=`LC_ALL=C /sbin/mii-tool $1 2>&1`
		if echo $output | grep -q "Operation not supported"; then
			return 0
		elif echo $output | grep -q "Invalid argument"; then
			return 0
		elif echo $output | grep -q "No MII transceiver present"; then
			return 0
		elif echo $output | grep -q "no link"; then
			return 0
		elif echo $output | grep -q "link ok"; then
			return 1
		else
			return 0
		fi
	fi
	return 0
}

# vim:ts=4