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|
#!/bin/sh
#
# ifdown-ipv6
#
#
# Taken from:
# (P) & (C) 2000-2001 by Peter Bieringer <pb@bieringer.de>
#
# RHL integration assistance by Pekka Savola <pekkas@netcore.fi>
#
# Version 2001-07-15
#
# 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:
# IPV6INIT=yes|no: controls IPv6 configuration for this interface
#
# Optional for 6to4 tunneling:
# IPV6TO4_RELAY=<ipv4address>: IPv4 address of the remote 6to4 relay
# IPV6TO4_ROUTING="eth0-:f101::0/64 eth1-:f102::0/64": information to setup local subnetting
# IPV6TO4_CONTROL_RADVD=yes|no: controls radvd triggering [optional]
# IPV6TO4_RADVD_PIDFILE=file: PID file of radvd for sending signals, default is "/var/run/radvd/radvd.pid" [optional]
#
# Requirements for 6to4 if using radvd:
# radvd-0.6.2p3 or newer supporting option "Base6to4Interface"
#
. /etc/sysconfig/network
cd /etc/sysconfig/network-scripts
. network-functions
CONFIG=$1
[ -f "$CONFIG" ] || CONFIG=ifcfg-$CONFIG
source_config
# Test whether IPv6 should be configured, else stop
[ "${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
test_ipv6 testonly || exit 0
# Switch some sysctls to secure mode
sysctl -w net.ipv6.conf.$DEVICE.forwarding=0 >/dev/null
sysctl -w net.ipv6.conf.$DEVICE.accept_ra=0 >/dev/null
sysctl -w net.ipv6.conf.$DEVICE.accept_redirects=0 >/dev/null
# Shutdown of 6to4, if configured
valid6to4config="yes"
if [ -z "$IPV6TO4_RELAY" ]; then
valid6to4config="no"
fi
if [ "$valid6to4config" = "yes" ]; then
if [ "$IPV6TO4_CONTROL_RADVD" = "yes" ]; then
# stop RADVD from distributing no longer usable 6to4 prefixes
if [ -z "$IPV6TO4_RADVD_PIDFILE" ]; then
IPV6TO4_RADVD_PIDFILE="/var/run/radvd/radvd.pid"
fi
# Send SIGHUP to radvd
if [ -f "$IPV6TO4_RADVD_PIDFILE" ]; then
pid="`cat $IPV6TO4_RADVD_PIDFILE`"
if [ ! -z "$pid" ]; then
# still waiting for feature enabling: stopping distribution of prefixes in RADVD....
# kill -SOMETHING $pid
false
else
false
fi
fi
fi
if [ ! -z "$IPV6TO4_ROUTING" ]; then
# Delete routes to local networks
for devsuf in $IPV6TO4_ROUTING; do
dev="`echo $devsuf | awk -F- '{ print $1 }'`"
ifdown_ipv6_route_all $dev ::
done
fi
# Detect type of address, whether it is IPv4 or IPv6
if testipv6_valid $IPV6TO4_RELAY; then
relay6to4type="ipv6"
fi
# Delete all static IPv6to4 routes
if [ "$relay6to4type" = "ipv6" ]; then
ifdown_ipv6_route_all sit0 $IPV6TO4_RELAY
else
ifdown_ipv6_route_all sit0 ::$IPV6TO4_RELAY
fi
# Delete old 6to4 routes, even if IPV6TO4_RELAY was changed
if [ -f /etc/sysconfig/static-routes-ipv6 ]; then
grep -w "^sit0" /etc/sysconfig/static-routes-ipv6 | while read device network dummy; do
if [ "$EXISTS_ipv6calc" = "yes" ]; then
# Convert given network to compressed one
network="`ipv6calc --addr_to_compressed $network`"
fi
LC_ALL=C route -A inet6 | grep "^$network" | while read destination nexthop flags metric ref use iface dummy; do
if ! [ "$device" = "$iface" -a "$network" = "$destination" ]; then
continue
fi
# Look for routes to a compatible IPv4 address, delete them
if echo $nexthop | egrep -q '^::[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$'; then
ifdown_ipv6_route $destination $nexthop $iface
fi
# Look for routes to a IPv6to4 address, delete them
if echo $nexthop | egrep -q '^2002::'; then
ifdown_ipv6_route $destination $nexthop $iface
fi
done
done
fi
# Delete 6to4 route
ifdown_ipv6_route 2002::/16 :: sit0
# Delete all configured 6to4 address
ifdown_ipv6to4_all sit0
fi
# Delete all current configured IPv6 addresses on this interface
ifdown_ipv6_real_all $DEVICE
|
