Subversion Repositories configs

#!/bin/sh

#

# ip-up.ipv6to4

#

#

# Taken from:

# (P) & (C) 2000-2005 by Peter Bieringer <pb@bieringer.de>

#

#  You will find more information on the initscripts-ipv6 homepage at

#   http://www.deepspace6.net/projects/initscripts-ipv6.html

#

# Version: 2005-09-22

#

# Calling parameters:

#  $1: interface name

#

# Called (mostly) by /etc/ppp/ip-up.local

#  like: /etc/ppp/ip-up.ipv6to4 $1 >>/var/log/ppp-ipv6to4.log 2>&1

#

# Note: this script will *kill* older still existing 6to4 tunnels regardless

#        whether they were set before by another device

#

# Uses following information from /etc/sysconfig/network-scripts/ifcfg-$1:

#  IPV6TO4INIT=yes|no: controls configuration

#  IPV6TO4_IPV4ADDR=<IPv4 address>: special local address for 6to4 tunneling (only needed behind a NAT gateway)

#  IPV6TO4_RELAY=<IPv4 address>: remote 6to4 relay router address (default: 192.88.99.1)

#  IPV6TO4_MTU=<MTU for IPv6>: controls IPv6 MTU for the 6to4 link (optional, default is MTU of interface - 20)

#  IPV6TO4_ROUTING="<device>-<suffix>/<prefix length> ...": information to setup additional interfaces

#    Example: IPV6TO4_ROUTING="eth0-:f101::1/64 eth1-:f102::1/64"

#

#  IPV6_CONTROL_RADVD=yes|no: controls radvd triggering

#  IPV6_RADVD_PIDFILE=<file>: PID file of radvd for sending signals, default is "/var/run/radvd/radvd.pid"

#  IPV6_RADVD_TRIGGER_ACTION=startstop|reload|restart|SIGHUP: how to trigger radvd (optional, default is SIGHUP)

#

# Requirements

#  radvd-0.6.2p3 or newer supporting option "Base6to4Interface"

#

if [ -z "$1" ]; then

	echo $"Argument 1 is empty but should contain interface name - skip IPv6to4 initialization"

	exit 1

fi

# Get global network configuration

. /etc/sysconfig/network

# Source IPv4 helper functions

cd /etc/sysconfig/network-scripts

. ./network-functions

CONFIG=$1

[ -f "$CONFIG" ] || CONFIG=ifcfg-$CONFIG

source_config

# IPv6 don't need aliases anymore, config is skipped

REALDEVICE=$(echo ${DEVICE} | sed 's/:.*//g')

[ "$DEVICE" != "$REALDEVICE" ] && exit 0

if [ ! -f /etc/sysconfig/network-scripts/network-functions-ipv6 ]; then

        exit 1

fi

. /etc/sysconfig/network-scripts/network-functions-ipv6

# Run basic IPv6 test (and make sure the ipv6 module will be loaded), if not ok, skip IPv6 initialization

ipv6_test || exit 1

# Setup of 6to4, if configured

valid6to4config="yes"

if [ "$IPV6TO4INIT" = "yes" ]; then

	if [ -n "$IPV6TO4_IPV4ADDR" ]; then

		# Take 6to4-dedicated configured IPv4 address from config file (precedence 1)

		ipv4addr="$IPV6TO4_IPV4ADDR"

        else

		# Get IPv4 address from interface (precedence 2)

		ipv4addr="$(ipv6_get_ipv4addr_of_device $DEVICE)"

		if [ -z "$ipv4addr" ]; then

                	# Take configured IPv4 address of interface from config file (precedence 3)

                	ipv4addr="$IPADDR"

            	fi

        fi

        if [ -n "$ipv4addr" ]; then

		# Test for non-global IPv4 address

		if ! ipv6_test_ipv4_addr_global_usable $ipv4addr; then

                	net_log $"Given IPv4 address '$ipv4addr' is not globally usable" info

			valid6to4config="no"

		fi

	else

		net_log $"IPv6to4 configuration needs an IPv4 address on related interface or otherwise specified" info

		valid6to4config="no"

	fi

	if [ -z "$IPV6TO4_RELAY" ]; then

		IPV6TO4_RELAY="192.88.99.1"

       	fi

	# Check/generate relay address

	ipv6to4_relay="$(ipv6_create_6to4_relay_address $IPV6TO4_RELAY)"

	if [ $? -ne 0 ]; then

		valid6to4config="no"

	fi

	if [ "$valid6to4config" = "yes" ]; then

		# Delete routes to local networks

       		for devsuf in $IPV6TO4_ROUTING; do

			dev="$(echo $devsuf | awk -F- '{ print $1 }')"

			ipv6_cleanup_6to4_device $dev

		done

		# Cleanup all old data (needed, if "ip-down.ipv6to4" wasn't executed), delete all configured 6to4 address

		ipv6_cleanup_6to4_tunnels tun6to4

		# Get MTU of master device

		ipv4mtu="$(/sbin/ip link show dev $DEVICE | grep -w "mtu" | awk '{ print $5 }')"

		if [ -n "$ipv4mtu" ]; then

			# IPv6 tunnel MTU is IPv4 MTU minus 20 for IPv4 header

			tunnelmtu=$[ $ipv4mtu - 20 ]

		fi

		if [ -n "$IPV6TO4_MTU" ]; then

			if [ $IPV6TO4_MTU -gt $tunnelmtu ]; then

				net_log $"Warning: configured MTU '$IPV6TO4_MTU' for 6to4 exceeds maximum limit of '$tunnelmtu', ignored" warning

			else

				tunnelmtu=$IPV6TO4_MTU

			fi

		fi

		# Setup new data

		ipv6_add_6to4_tunnel tun6to4 $ipv4addr "" $tunnelmtu || exit 1

		# Add route to for compatible addresses (removed later again)

		ipv6_add_route "::/96" "::" tun6to4

		# Add default route, if device matches

		if [ "$IPV6_DEFAULTDEV" = "tun6to4" ]; then

			if [ -n "$IPV6_DEFAULTGW" ]; then

				net_log $"Warning: interface 'tun6to4' does not support 'IPV6_DEFAULTGW', ignored" warning

			fi

			ipv6_set_default_route $ipv6to4_relay tun6to4

		fi

		# Add static routes

		if [ -f /etc/sysconfig/static-routes-ipv6 ]; then

			LC_ALL=C grep -w "^tun6to4" /etc/sysconfig/static-routes-ipv6 | while read device network gateway; do

				if [ -z "$network" ]; then

					continue

				fi

				if [ -z "$gateway" ]; then

					gateway="$ipv6to4_relay"

				fi

				ipv6_add_route $network $gateway tun6to4

			done

		fi

                # Setup additional static IPv6 routes (newer config style)

		if [ -f "/etc/sysconfig/network-scripts/route6-tun6to4" ]; then

			cat "/etc/sysconfig/network-scripts/route6-tun6to4" | sed 's/#.*//g' | grep -v '^[[:space:]]*$' | while read line; do

				if echo "$line" | grep -vq 'via'; then

					# Add gateway if missing

					line="$line via $ipv6to4_relay"

				fi

				/sbin/ip -6 route add $line

			done

                fi

		# Cleanup autmatically generated autotunnel (not needed for 6to4)

		/sbin/ip -6 route del ::/96 dev tun6to4

		/sbin/ip -6 addr del tun6to4 "::$ipv4addr/128" dev tun6to4

	        if [ "$IPV6_CONTROL_RADVD" = "yes" ]; then

                        # Control running radvd

			ipv6_trigger_radvd up "$IPV6_RADVD_TRIGGER_ACTION" $IPV6_RADVD_PIDFILE

			if [ -n "$IPV6TO4_ROUTING" ]; then

				# Generate 6to4 address

				ipv6to4prefix="$(ipv6_create_6to4_prefix $ipv4addr)"

				if [ -n "$ipv6to4prefix" ]; then

					# Add IPv6 address to interface (required interface route will be set automatically)

					for devsuf in $IPV6TO4_ROUTING; do

						dev="$(echo $devsuf | awk -F- '{ print $1 }')"

						suf="$(echo $devsuf | awk -F- '{ print $2 }')"

						ipv6_add_addr_on_device ${dev} ${ipv6to4prefix}${suf}

					done

				else

					net_log $"Error occured while calculating the IPv6to4 prefix"

				fi

			else

				net_log $"radvd control enabled, but config is not complete"

			fi

		fi

	fi

fi