- IPv6 specific rules and routes, rationale: some rules (and even routes)

[projects/rc-scripts.git] / sysconfig / network-scripts / ifup-routes

#!/bin/sh
#
#	$Id$
#
# Adds static routes which go through device $DEVICE
# Called from ifup-post.

if [ ! -f /etc/sysconfig/static-routes ]; then
	return
fi

# note the trailing white space character in the grep gets rid of aliases
grep -E "^($DEVICE|any)[[:blank:]]" /etc/sysconfig/static-routes | while read device args; do
	if [[ "$args" = *:* ]]; then
		if is_no "$IPV6_NETWORKING"; then
			continue
		fi
	else
		if is_no "$IPV4_NETWORKING"; then
			continue
		fi
	fi
	/sbin/ip route add $args dev $REALDEVICE
done


# based on information from http://avahi.org/wiki/AvahiAutoipd#Routes
if is_yes "$ZEROCONF" && ! /sbin/ip link show dev $REALDEVICE | grep -q POINTOPOINT ; then
	# metric based on device ifindex, so the same route may be added to
	# multiple devices. Big, so it won't conflict with anything else.
	if [ -f /sys/class/net/$REALDEVICE/ifindex ] ; then
		metric="$(cat /sys/class/net/$REALDEVICE/ifindex)"
		metric=$(($metric + 1000))
	else
		metric=1000
	fi

	# default route in default table, so it won't override default
	# route set by other means
	/sbin/ip route add default metric $metric dev $REALDEVICE table default

	# add 169.254.0.0/16 route if not already present on the device
	current=$(/sbin/ip route show 169.254.0.0/16 dev $REALDEVICE)
	if [ -z "$current" ] ; then
		/sbin/ip route add 169.254.0.0/16 metric $metric dev $REALDEVICE
	fi

	unset metric
	unset current
fi