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#!/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-$CONFIG source_config # IPv6 don't need aliases anymore, config is skipped REALDEVICE=${DEVICE%%:*} [ "$DEVICE" != "$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 $IPV6TO4_ROUTING; do dev="${devsuf%%-*}" 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 | awk '/\<mtu\>/ { 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 $gateway tun6to4 done fi # Setup additional static IPv6 routes (newer config style) if [ -f "/etc/sysconfig/network-scripts/route6-tun6to4" ]; then sed -ne 's/#.*//' -e '/[^[:space:]]/p' /etc/sysconfig/network-scripts/route6-tun6to4 | while read line; do if echo "$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 $IPV6TO4_ROUTING; do dev="${devsuf%%-*}" suf="$(echo $devsuf | awk -F- '{ print $2 }')" ipv6_add_addr_on_device ${dev} ${ipv6to4prefix}${suf} done else net_log $"Error occurred while calculating the IPv6to4 prefix" fi else net_log $"radvd control enabled, but config is not complete" fi fi fi fi
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