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|
#!/bin/sh
#
# init.ipv6-global
#
#
# Taken from:
# (P) & (C) 2001 by Peter Bieringer <pb@bieringer.de>
#
# RHL integration assistance by Pekka Savola <pekkas@netcore.fi>
#
# Version 2001-07-15a
#
# Calling parameters:
# $1: action (currently supported: start|stop|showsysctl)
# $2: position for start|stop (currently supported: pre|post)
#
# Called by hooks from /etc/rc.d/init.d/network
#
# Uses following information from /etc/sysconfig/network:
# NETWORKING_IPV6=yes|no: controls global IPv6 initialization (default: no)
# IPV6FORWARDING=yes|no: controls global IPv6 forwarding (default: no)
# IPV6AUTOCONF=yes|no: controls global automatic IPv6 configuration
# (default: yes if IPV6FORWARDING=no, no if IPV6FORWARDING=yes)
# IPV6_AUTOTUNNEL=yes|no: controls automatic IPv6 tunneling (default: no)
#
# Get global network configuration
. /etc/sysconfig/network
# Source IPv4 helper functions
cd /etc/sysconfig/network-scripts
. network-functions
# Get action and hook position
ACTION="$1"
POSITION="$2"
# Test whether IPv6 should be configured, else stop
[ "${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
# Initialize IPv6, depending on caller option
case $ACTION in
start)
case $POSITION in
pre)
# IPv6 test, module loaded, exit if system is not IPv6-ready
test_ipv6 || exit 1
if [ "$IPV6FORWARDING" = "yes" ]; then
ipv6_global_forwarding=1
ipv6_global_auto=0
else
ipv6_global_forwarding=0
if [ "$IPV6AUTO" = "no" ]; then
ipv6_global_auto=0
else
ipv6_global_auto=1
fi
fi
# Reset IPv6 sysctl switches for "all", "default" and still existing devices
for i in /proc/sys/net/ipv6/conf/*; do
if [ ! -d $i ]; then
continue
fi
interface="`echo $i | awk -F/ '{ print $NF}'`"
# Host/Router behaviour for the interface
sysctl -w net.ipv6.conf.$interface.forwarding=$ipv6_global_forwarding >/dev/null
# Autoconfiguration and redirect handling for Hosts
sysctl -w net.ipv6.conf.$interface.accept_ra=$ipv6_global_auto >/dev/null
sysctl -w net.ipv6.conf.$interface.accept_redirects=$ipv6_global_auto >/dev/null
done
if [ "$IPV6_AUTOTUNNEL" = "yes" ]; then
ifup_ipv6_autotunnel
fi
;;
post)
# IPv6 test, module loaded, exit if system is not IPv6-ready
test_ipv6 || exit 1
## Add some routes which should never appear on the wire
# Unreachable IPv4-only addresses, normally blocked by source address selection
ip route add unreach ::ffff:0.0.0.0/96
# Unreachable IPv4-mapped addresses
ip route add unreach ::0.0.0.0/96
# Unreachable 6to4: IPv4 multicast, reserved, limited broadcast
ip route add unreach 2002:e000::/19
# Unreachable 6to4: IPv4 loopback
ip route add unreach 2002:7f00::/24
# Unreachable 6to4: IPv4 private (RFC1918)
ip route add unreach 2002:0a00::/24
ip route add unreach 2002:ac10::/28
ip route add unreach 2002:c0a8::/32
# Unreachable 6to4: IPv4 private (DHCP link-local)
ip route add unreach 2002:a9fe::/32
;;
*)
echo "Usage: $0 $1 {pre|post}"
;;
esac
;;
stop)
case $POSITION in
pre)
# IPv6 test, no module loaded, exit if system is not IPv6-ready
test_ipv6 testonly || exit 0
;;
post)
# IPv6 test, no module loaded, exit if system is not IPv6-ready
test_ipv6 testonly || exit 0
for i in /proc/sys/net/ipv6/conf/*; do
if [ ! -d $i ]; then
continue
fi
interface="`echo $i | awk -F/ '{ print $NF}'`"
# Assume Host behaviour
sysctl -w net.ipv6.conf.$interface.forwarding=0 >/dev/null
# Disable autoconfiguration and redirects
sysctl -w net.ipv6.conf.$interface.accept_ra=0 >/dev/null
sysctl -w net.ipv6.conf.$interface.accept_redirects=0 >/dev/null
done
# Find still existing tunnel devices and shutdown and delete them
LC_ALL=C ip tunnel | grep "ipv6/ip" | awk -F: '{ print $1 }' | while read device; do
ifdown_ipv6_tunneldev $device
done
;;
*)
echo "Usage: $0 $1 {pre|post}"
;;
esac
;;
restart|reload)
# do nothing, will be handled by main script
;;
showsysctl)
# Run only basic tests, no module is loaded, if not ok, skip IPv6 initialization
test_ipv6 testonly || exit 0
# Show sysctl switches
for i in /proc/sys/net/ipv6/conf/default/*; do
if [ ! -f $i ]; then continue; fi
switch="`echo $i | awk -F/ '{ print $NF}'`"
for j in /proc/sys/net/ipv6/conf/*; do
if [ ! -d $j ]; then continue; fi
interface="`echo $j | awk -F/ '{ print $NF}'`"
sysctl net.ipv6.conf.$interface.$switch
done
echo
done
;;
*)
echo "Usage: $0 {start|stop|showsysctl}"
exit 1
;;
esac
|
