140 lines
4.4 KiB
Bash
Executable File
140 lines
4.4 KiB
Bash
Executable File
#!/bin/sh
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#
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# ifdown-ipv6
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#
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#
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# Taken from:
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# (P) & (C) 2000-2004 by Peter Bieringer <pb@bieringer.de>
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#
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# You will find more information on the initscripts-ipv6 homepage at
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# http://www.deepspace6.net/projects/initscripts-ipv6.html
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#
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# RHL integration assistance by Pekka Savola <pekkas@netcore.fi>
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#
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# Version 2005-09-22
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#
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# Note: if called as (like normally) by /etc/sysconfig/network-scripts/ifdown
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# exit codes aren't handled by "ifdown"
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#
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# Uses following information from /etc/sysconfig/network-scripts/ifcfg-$1:
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# DEVICE=<device>
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# IPV6INIT=yes|no: controls IPv6 configuration for this interface
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#
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# Optional for 6to4 tunneling:
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# IPV6TO4_RELAY=<IPv4 address>: IPv4 address of the remote 6to4 relay [default: 192.88.99.1]
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# IPV6TO4_ROUTING="<device>-<suffix>/<prefix length> ...": information to setup internal interfaces
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#
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# Optional for 6to4 tunneling links to trigger radvd:
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# IPV6_CONTROL_RADVD=yes|no: controls radvd triggering [optional]
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# IPV6_RADVD_PIDFILE=<file>: PID file of radvd for sending signals, default is "/run/radvd/radvd.pid" [optional]
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# IPV6_RADVD_TRIGGER_ACTION=startstop|reload|restart|SIGHUP: how to trigger radvd [optional, default is SIGHUP]
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#
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# Required version of radvd to use 6to4 prefix recalculation
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# 0.6.2p3 or newer supporting option "Base6to4Interface"
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# Required version of radvd to use dynamic ppp links
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# 0.7.0 + fixes or newer
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#
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. /etc/sysconfig/network
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cd /etc/sysconfig/network-scripts
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. ./network-functions
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CONFIG=$1
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[ -f "$CONFIG" ] || CONFIG=ifcfg-$CONFIG
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source_config
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REALDEVICE=${DEVICE%%:*}
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DEVICE=$REALDEVICE
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[ -f /etc/sysconfig/network-scripts/network-functions-ipv6 ] || exit 1
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. /etc/sysconfig/network-scripts/network-functions-ipv6
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# IPv6 test, no module loaded, exit if system is not IPv6-ready
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ipv6_test testonly || exit 0
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# Test device status
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ipv6_test_device_status $DEVICE
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if [ $? != 0 -a $? != 11 ]; then
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# device doesn't exist or other problem occurs
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exit 1
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fi
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if [ ! "$IPV6_SET_SYSCTLS" = "no" ]; then
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# Switch some sysctls to secure mode
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/sbin/sysctl -e -w net.ipv6.conf.$SYSCTLDEVICE.forwarding=0 >/dev/null 2>&1
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/sbin/sysctl -e -w net.ipv6.conf.$SYSCTLDEVICE.accept_ra=0 >/dev/null 2>&1
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/sbin/sysctl -e -w net.ipv6.conf.$SYSCTLDEVICE.accept_redirects=0 >/dev/null 2>&1
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fi
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/sbin/ip link set $DEVICE addrgenmode eui64 >/dev/null 2>&1
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# Test status of tun6to4 device
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ipv6_test_device_status tun6to4
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if [ $? = 0 -o $? = 11 ]; then
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# Device exists
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valid6to4config="yes"
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if [ -z "$IPV6TO4_RELAY" ]; then
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IPV6TO4_RELAY="192.88.99.1"
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fi
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# Get IPv4 address from interface
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if [ -n "$IPV6TO4_IPV4ADDR" ]; then
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# Take special configured from config file (precedence 1)
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ipv4addr="$IPV6TO4_IPV4ADDR"
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# Get IPv4 address from interface first
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ipv4addrlocal="$(ipv6_get_ipv4addr_of_device $DEVICE)"
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if [ -z "$ipv4addrlocal" ]; then
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# Take configured from config file
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ipv4addrlocal="$IPADDR"
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fi
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else
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# Get IPv4 address from interface first (has precedence 2)
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ipv4addr="$(ipv6_get_ipv4addr_of_device $DEVICE)"
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if [ -z "$ipv4addr" ]; then
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# Take configured from config file (precedence 3)
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ipv4addr="$IPADDR"
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fi
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ipv4addrlocal="$ipv4addr"
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fi
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# Get local IPv4 address of dedicated tunnel
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ipv4addr6to4local="$(ipv6_get_ipv4addr_of_tunnel tun6to4 local)"
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if [ -z "$ipv4addrlocal" -o -z "$ipv4addr6to4local" ]; then
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# no IPv4 addresses given, 6to4 sure not configured
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valid6to4config="no"
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else
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# Check against configured 6to4 tunnel to see if this interface was
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# used before
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if [ "$ipv4addrlocal" != "$ipv4addr6to4local" ]; then
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# IPv4 address of interface does't match local tunnel address,
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# interface was not used for current 6to4 setup
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valid6to4config="no"
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fi
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fi
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fi
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# Shutdown of 6to4, if configured
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if [ "$valid6to4config" = "yes" ]; then
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if [ -n "$IPV6TO4_ROUTING" ]; then
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# Delete routes to local networks
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for devsuf in $IPV6TO4_ROUTING; do
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dev="${devsuf%%-*}"
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ipv6_cleanup_6to4_device $dev
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done
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fi
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# Delete all configured 6to4 address
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ipv6_cleanup_6to4_tunnels tun6to4
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# Control running radvd
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ipv6_trigger_radvd down "$IPV6_RADVD_TRIGGER_ACTION" $IPV6_RADVD_PIDFILE
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fi
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# Delete all current configured IPv6 addresses on this interface
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ipv6_cleanup_device $DEVICE
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