#!/bin/sh # # ifdown-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 2002-04-12 # # Note: if called as (like normally) by /etc/sysconfig/network-scripts/ifdown # exit codes aren't handled by "ifdown" # # Uses following information from /etc/sysconfig/network: # NETWORKING_IPV6=yes|no: controls IPv6 initialization (global setting) # # Uses following information from /etc/sysconfig/network-scripts/ifcfg-$1: # DEVICE= # IPV6INIT=yes|no: controls IPv6 configuration for this interface # # Optional for 6to4 tunneling: # IPV6TO4_RELAY=: IPv4 address of the remote 6to4 relay [default: 192.88.99.1] # IPV6TO4_ROUTING="-/ ...": information to setup local subnetting # # Optional for 6to4 tunneling links 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" != "$REALDEVICE" ] && exit 0 # Test whether IPv6 should be configured, else stop [ "${NETWORKING_IPV6}" = "yes" ] || exit 0 if [ ! -f /etc/sysconfig/network-scripts/network-functions-ipv6 ]; then exit 1 fi # Source IPv6 helper functions . /etc/sysconfig/network-scripts/network-functions-ipv6 # IPv6 test, no module loaded, exit if system is not IPv6-ready ipv6_test testonly || exit 0 # Test device status ipv6_test_device_status $DEVICE if [ $? != 0 -a $? != 11 ]; then # device doesn't exist or other problem occurs exit 1 fi # Switch some sysctls to secure mode ipv6_exec_sysctl -w net.ipv6.conf.$DEVICE.forwarding=0 >/dev/null ipv6_exec_sysctl -w net.ipv6.conf.$DEVICE.accept_ra=0 >/dev/null ipv6_exec_sysctl -w net.ipv6.conf.$DEVICE.accept_redirects=0 >/dev/null # Shutdown of 6to4, if configured valid6to4config="yes" if [ -z "$IPV6TO4_RELAY" ]; then IPV6TO4_RELAY="192.88.99.1" fi # Get IPv4 address from interface if [ ! -z "$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="$IPADDR" fi fi # Get local IPv4 address of dedicated tunnel ipv4addr6to4local="`ipv6_get_ipv4addr_of_tunnel tun6to4 local`" if [ -z "$ipv4addr" -o -z "$ipv4addr6to4local" ]; then # no IPv4 addresses given, 6to4 sure not configured valid6to4config="no" else # Check against configured 6to4 tunnel to see if this interface was used before if [ "$ipv4addr" != "$ipv4addr6to4local" ]; then # IPv4 address of interface does't match local tunnel address, interface was not used for current 6to4 setup valid6to4config="no" fi fi # Shutdown of 6to4, if configured if [ "$valid6to4config" = "yes" ]; then if [ ! -z "$IPV6TO4_ROUTING" ]; then # Delete routes to local networks for devsuf in $IPV6TO4_ROUTING; do dev="`echo $devsuf | awk -F- '{ print $1 }'`" ipv6_cleanup_routes $dev :: done fi # Delete all configured 6to4 address ipv6_cleanup_6to4_tunnels tun6to4 # Control running radvd ipv6_trigger_radvd down "$IPV6_RADVD_TRIGGER_ACTION" $IPV6_RADVD_PIDFILE fi # Delete all current configured IPv6 addresses on this interface ipv6_cleanup_device $DEVICE