#!/sbin/runscript
# Copyright 1999-2003 Gentoo Technologies, Inc.
# Distributed under the terms of the GNU General Public License v2
# $Header: /etc/init.d/net.eth0,v 1.30 2003/10/18 18:03:19 faye 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
}

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 ($1 == IFACE) print "up" }')"
	if [ -x `which iwconfig` ]; then
		wireless_IFACE="$(iwconfig 2>/dev/null | gawk -v IFACE="${IFACE}" '/IEEE/ { if ($1 == IFACE) print "yes" }')"
	fi
	wireless_IFACE=${wireless_IFACE:-"no"}
	if [ -x `which mii-tool` ]; then
		link_IFACE=$(mii-tool ${IFACE} 2>/dev/null | gawk '{print $2}')
	fi
	link_IFACE=${link_IFACE:-"yes"}
}

setup_wireless() {
	# Reset to some defaults
	iwconfig $IFACE mode Managed
	iwconfig $IFACE rate auto
	iwconfig $IFACE key off
	iwconfig $IFACE rts off
	iwconfig $IFACE frag off
	iwconfig $IFACE essid any
	# Initiate a scan
	ifconfig $IFACE up
	# Wait for a response
	sleep 2
	# Find known access points
	for AP in `iwlist ${IFACE} scan 2>/dev/null | grep ESSID | awk -F: '{print $2}' | sed 's/[-"]//g'`; do
		if [ -z ${essid_AP} ]; then
			essid_AP="$(eval echo \$\{essid_${AP}\})"
			if [ ! -z ${essid_AP} ]; then
				# setup variables
				key_AP="$(eval echo \$\{key_${AP}\})"
				iface_IFACE="$(eval echo \$\{iface_${AP}\})"
				gateway="${IFACE}/$(eval echo \$\{gateway_${AP}\})"
			fi
		fi
	done
	# Bring interface down to apply changes
	ifconfig $IFACE down
#ewarn "Setting wireless parameters ${essid_AP} and ${key_AP}"
	if [ ! -z ${essid_AP} ]; then
		iwconfig ${IFACE} essid ${essid_AP}
	fi
	if [ ! -z ${key_AP} ]; then
		iwconfig ${IFACE} key ${key_AP}
	fi
	# Bring the interface up
	ifconfig $IFACE up
	# Wait for the system to associate
	while [ `iwconfig $IFACE | awk '/\<..:..:..:..:..:..\>/{print}' | sed 's/^.*\<\(..:..:..:..:..:..\)\>.*$/\1/g'` = FF:FF:FF:FF:FF:FF ]; do
		LC_NUMERIC=C sleep 0.5
	done
	return 0
}

start() {
	local retval=0

	setup_env
	checkconfig || return 1
	if [ ${wireless_IFACE} == "yes" ]; then
		ebegin "Detecting network for ${IFACE}"
		setup_wireless
		eend 0
	fi
	ebegin "Bringing ${IFACE} up"
	if [ ${link_IFACE} == "no" ]
	then
		retval=1
		eend ${retval} "Failed to bring ${IFACE} up"
		return ${retval}
	fi
	if [ "${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
	# If started by hotplug, this doesn't get done.
	# perhaps the right fix is in hotplug
	ln -sf /etc/init.d/net.${IFACE} /var/lib/init.d/started/net.${IFACE}
}

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
}


# vim:ts=4