#!/bin/sh # # ifup-ipv6 # # # Taken from: # (P) & (C) 2000-2002 by Peter Bieringer # # You will find more information in the IPv6-HowTo for Linux at # http://www.bieringer.de/linux/IPv6/ # # RHL integration assistance by Pekka Savola # # Version 2002-11-12a # # Note: if called (like normally) by /etc/sysconfig/network-scripts/ifup # exit codes aren't handled by "ifup" # # Uses following information from "/etc/sysconfig/network": # NETWORKING_IPV6=yes|no: controls IPv6 initialization (global setting) # IPV6_DEFAULTDEV=: controls default route (optional) # IPV6_DEFAULTGW=
: controls default route (optional) # # Uses following information from "/etc/sysconfig/network-scripts/ifcfg-$1": # IPV6INIT=yes|no: controls IPv6 configuration for this interface # IPV6ADDR=[/]: specify primary static IPv6 address # IPV6ADDR_SECONDARIES="[/] ..." (optional) # IPV6_ROUTER=yes|no: controls IPv6 autoconfiguration (no: multi-homed interface without routing) # IPV6_AUTOCONF=yes|no: controls IPv6 autoconfiguration # defaults: # IPV6FORWARDING=yes: IPV6_AUTOCONF=no, IPV6_ROUTER=yes # IPV6FORWARDING=no: IPV6_AUTOCONF=yes # IPV6_MTU=: controls IPv6 MTU for this link (optional) # # Optional for 6to4 tunneling (hardwired name of tunnel device is "tun6to4"): # IPV6TO4INIT=yes|no: controls 6to4 tunneling setup # IPV6TO4_RELAY=: IPv4 address of the remote 6to4 relay (default: 192.88.99.1) # IPV6TO4_MTU=: controls IPv6 MTU for the 6to4 link (optional, default is MTU of interface - 20) # IPV6TO4_IPV4ADDR=: overwrite local IPv4 address (optional) # IPV6TO4_ROUTING="-/ ...": information to setup local subnetting # Example: IPV6TO4_ROUTING="eth0-:f101::0/64 eth1-:f102::0/64" # # Optional for 6to4 tunneling to trigger radvd: # IPV6_CONTROL_RADVD=yes|no: controls radvd triggering (optional) # IPV6_RADVD_PIDFILE=: PID file of radvd for sending signals, default is "/var/run/radvd/radvd.pid" (optional) # IPV6_RADVD_TRIGGER_ACTION=startstop|reload|restart|SIGHUP: how to trigger radvd (optional, default is SIGHUP) # # Required version of radvd to use 6to4 prefix recalculation # 0.6.2p3 or newer supporting option "Base6to4Interface" # Required version of radvd to use dynamic ppp links # 0.7.0 + fixes or newer # . /etc/sysconfig/network 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" != "$REALDEVICE" ] && exit 0 # Test whether IPv6 configuration is enabled for this interface, else stop [ "$IPV6INIT" = "yes" ] || exit 0 # Test whether IPv6 should be configured, else stop [ "${NETWORKING_IPV6}" = "yes" ] || exit 0 [ -f /etc/sysconfig/network-scripts/network-functions-ipv6 ] || exit 1 . /etc/sysconfig/network-scripts/network-functions-ipv6 # IPv6 test, module loaded, exit if system is not IPv6-ready ipv6_test || exit 1 # Test device status ipv6_test_device_status $DEVICE if [ $? != 0 -a $? != 11 ]; then # device doesn't exist or other problem occurs exit 1 fi # Setup IPv6 address on specified interface if ! [ -z "$IPV6ADDR" ]; then ipv6_add_addr_on_device $DEVICE $IPV6ADDR || exit 1 fi # Get current global IPv6 forwarding ipv6_global_forwarding_current="`ipv6_exec_sysctl -n net.ipv6.conf.all.forwarding`" # Set some proc switches depending on defines if [ "$IPV6FORWARDING" = "yes" ]; then # Global forwarding should be enabled # Check, if global IPv6 forwarding was already set by global script if [ $ipv6_global_forwarding_current -ne 1 ]; then echo $"Global IPv6 forwarding is enabled in configuration, but not currently enabled in kernel" echo $"Please restart network with '/sbin/service network restart'" fi ipv6_local_forwarding=1 ipv6_local_auto=0 if [ "$IPV6_ROUTER" = "no" ]; then ipv6_local_forwarding=0 fi if [ "$IPV6_AUTOCONF" = "yes" ]; then ipv6_local_auto=1 fi else # Global forwarding should be disabled # Check, if global IPv6 forwarding was already set by global script if [ $ipv6_global_forwarding_current -ne 0 ]; then echo $"Global IPv6 forwarding is disabled in configuration, but not currently disabled in kernel" echo $"Please restart network with '/sbin/service network restart'" fi ipv6_local_forwarding=0 ipv6_local_auto=1 if [ "$IPV6_AUTOCONF" = "no" ]; then ipv6_local_auto=0 fi fi ipv6_exec_sysctl -w net.ipv6.conf.$DEVICE.forwarding=$ipv6_local_forwarding >/dev/null ipv6_exec_sysctl -w net.ipv6.conf.$DEVICE.accept_ra=$ipv6_local_auto >/dev/null ipv6_exec_sysctl -w net.ipv6.conf.$DEVICE.accept_redirects=$ipv6_local_auto >/dev/null # Set IPv6 MTU, if given if [ -n "$IPV6_MTU" ]; then ipv6_set_mtu $DEVICE $IPV6_MTU fi # Setup additional IPv6 addresses from list, if given if [ -n "$IPV6ADDR_SECONDARIES" ]; then for ipv6addr in $IPV6ADDR_SECONDARIES; do ipv6_add_addr_on_device $DEVICE $ipv6addr done fi # Setup default IPv6 route, check are done by function if [ -n "$IPV6_DEFAULTDEV" -o -n "$IPV6_DEFAULTGW" ]; then ipv6_set_default_route "$IPV6_DEFAULTGW" "$IPV6_DEFAULTDEV" "$DEVICE" fi # Setup additional static IPv6 routes on specified interface, if given if [ -f /etc/sysconfig/static-routes-ipv6 ]; then LC_ALL=C grep -w "^$DEVICE" /etc/sysconfig/static-routes-ipv6 | while read device args; do ipv6_add_route $args $DEVICE done fi # Setup of 6to4, if configured if [ "$IPV6TO4INIT" = "yes" ]; then valid6to4config="yes" # Test device status of 6to4 tunnel ipv6_test_device_status tun6to4 if [ $? = 0 ]; then # device is already up echo $"Device 'tun6to4' (from '$DEVICE') is already up, shutdown first" exit 1 fi # Get IPv4 address for local 6to4 prefix calculation if [ -n "$IPV6TO4_IPV4ADDR" ]; then # Take special configured from config file (precedence 1) ipv4addr="$IPV6TO4_IPV4ADDR" else # Get IPv4 address from interface first (has precedence 2) ipv4addr="`ipv6_get_ipv4addr_of_device $DEVICE`" if [ -z "$ipv4addr" ]; then # Take configured from config file (precedence 3) ipv4addr="$IPADDR" fi fi if [ -n "$ipv4addr" ]; then if ! ipv6_test_ipv4_addr_global_usable $ipv4addr; then echo $"Given IPv4 address '$ipv4addr' is not globally usable" 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 else echo $"IPv6to4 configuration needs an IPv4 address on related interface or otherwise specified" valid6to4config="no" fi # Setup 6to4 tunnel (hardwired name is "tun6to4"), if config is valid if [ "$valid6to4config" = "yes" ]; then # Get MTU of master device ipv4mtu="`ipv6_exec_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 echo $"Warning: configured MTU '$IPV6TO4_MTU' for 6to4 exceeds maximum limit of '$tunnelmtu', ignored" else tunnelmtu=$IPV6TO4_MTU fi fi ipv6_add_6to4_tunnel tun6to4 $ipv4addr "" $tunnelmtu || exit 1 # Add default route, if device matches if [ "$IPV6_DEFAULTDEV" = "tun6to4" ]; then if [ -n "$IPV6_DEFAULTGW" ]; then echo $"Warning: interface 'tun6to4' does not support 'IPV6_DEFAULTGW', ignored" 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 $gateway tun6to4 done fi # Cleanup autmatically generated autotunnel (not needed for 6to4) ipv6_del_route "::/96" "::" tun6to4 ipv6_del_addr_on_device tun6to4 "::$ipv4addr/128" if [ "$IPV6_CONTROL_RADVD" = "yes" ]; then # RADVD is in use, so forwarding of IPv6 packets should be enabled, display warning if [ $ipv6_global_forwarding_current -ne 1 ]; then echo $"Using 6to4 and RADVD IPv6 forwarding usually should be enabled, but it isn't" fi if [ -n "$IPV6TO4_ROUTING" ]; then ipv6to4prefix="`ipv6_create_6to4_prefix $ipv4addr`" if [ -n "$ipv6to4prefix" ]; then # Add route to local networks for devsuf in $IPV6TO4_ROUTING; do dev="`echo $devsuf | awk -F- '{ print $1 }'`" suf="`echo $devsuf | awk -F- '{ print $2 }'`" ipv6_add_route ${ipv6to4prefix}$suf :: $dev done else echo $"Error occured while calculating the IPv6to4 prefix" fi else echo $"radvd control enabled, but config is not complete" fi # Control running radvd ipv6_trigger_radvd up "$IPV6_RADVD_TRIGGER_ACTION" $IPV6_RADVD_PIDFILE fi else echo $"6to4 configuration is not valid" exit 1 fi fi