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#!/bin/bash
#
# ip-up.ipv6to4
#
#
# Taken from:
# (P) & (C) 2000-2001 by Peter Bieringer <pb@bieringer.de>
#
# Version 2001-05-07
#
# Calling parameters:
# $1: interface name
#
# Called by (mostly) /etc/ppp/ip-up.local
# like: /etc/ppp/ip-up.ipv6to4 $1 >>/var/log/ppp-ipv6to4.log 2>&1
#
# 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:
# IPV6TO4INIT=yes|no: controls configuration
# IPV6TO4_IPV4ADDR=IPv4addr: special local address for 6to4 tunneling (only needed behind a NAT gateway)
# IPV6TO4_RELAY=IPv4addr: remote IPv6to4 relay address
# IPV6TO4_ROUTING="eth0-:f101::0/64 eth1-:f102::0/64": information to setup local subnetting
# IPV6TO4_CONTROL_RADVD=yes|no: controls radvd triggering
# IPV6TO4_RADVD_PIDFILE=file: PID file of radvd for sending signals, default is "/var/run/radvd/radvd.pid"
#
# Requirements
# radvd-0.6.2p3 or newer supporting option "Base6to4Interface"
#
if [ -z "$1" ]; then
echo $"Option 1 is empty but should contain interface name - skip IPv6to4 initialization" >/dev/stderr
exit 1
fi
# Get global network configuration
. /etc/sysconfig/network
# Source IPv4 helper functions
cd /etc/sysconfig/network-scripts
. network-functions
CONFIG=$1
[ -f "$CONFIG" ] || CONFIG=ifcfg-$CONFIG
source_config
# Test if IPv6 is globally enabled
if [ ! "${NETWORKING_IPV6}" = "yes" ]; then
# Global IPv6 switch not enabled, end now
exit 0
fi
if [ ! -f /etc/sysconfig/network-scripts/network-functions-ipv6 ]; then
# IPv6 setup isn't well
exit 1
fi
. /etc/sysconfig/network-scripts/network-functions-ipv6
# Run basic IPv6 test (and make sure the ipv6 module will be loaded), if not ok, skip IPv6 initialization
test_ipv6 || exit 1
# Setup of 6to4, if configured
valid6to4config="yes"
if [ "$IPV6TO4INIT" = "yes" ]; then
if [ ! -z "$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="`LC_ALL=C ifconfig $DEVICE |grep "inet addr:" | tr : " " | awk '{ print $3 }'`"
if [ -z "$ipv4addr" ]; then
# Take configured from config file (precedence 3)
ipv4addr="$IPADDR"
fi
fi
if [ ! -z "$ipv4addr" ]; then
# Test for non-global IPv4 address
if ! testipv4_globalusable $ipv4addr; then
echo $"Given IPv4 address $ipv4addr is not a globally usable one, 6to4 configuration is not valid!"
valid6to4config="no"
fi
if [ -z "$IPV6TO4_RELAY" ]; then
echo $"IPv6to4 configuration needs an IPv6to4 relay address, 6to4 configuration is not valid!"
valid6to4config="no"
fi
else
echo $"IPv6to4 configuration needs an IPv4 address on related interface or extra specified, 6to4 configuration is not valid!"
valid6to4config="no"
fi
if [ "$valid6to4config" = "yes" ]; then
# Beep
if [ -x /usr/bin/beep ]; then /usr/bin/beep -f 2000; else echo -en "\a" >/dev/console; fi
# Cleanup all old data (needed, if "ip-down.ipv6to4" wasn't executed)
# Delete all static IPv6to4 routes to relay
ifdown_ipv6_route_all sit0 ::$IPV6TO4_RELAY
# Delete routes to local networks
for devsuf in $IPV6TO4_ROUTING; do
dev="`echo $devsuf | awk -F- '{ print $1 }'`"
ifdown_ipv6_route_all $dev ::
done
# Delete all configured 6to4 address
ifdown_ipv6to4_all sit0
# Setup new data
ifup_ipv6to4 $DEVICE $ipv4addr || exit 1
if [ -f /etc/sysconfig/static-routes-ipv6 ]; then
grep "^sit0" /etc/sysconfig/static-routes-ipv6 | while read device args; do
if [ "$device" = "sit0" ]; then
ifup_ipv6_route $args ::$IPV6TO4_RELAY sit0
fi
done
fi
if [ "$IPV6TO4_CONTROL_RADVD" = "yes" ]; then
if [ -z "$IPV6TO4_RADVD_PIDFILE" ]; then
# Take default
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
echo $"Trigger RADVD for IPv6to4 prefix recalculation"
kill -HUP $pid
else
false
fi
fi
if [ ! -z "$IPV6TO4_ROUTING" ]; then
# Generate 6to4 address
ipv6to4prefix="`create6to4prefix $ipv4addr`"
if [ ! -z "$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 }'`"
ifup_ipv6_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
fi
# Beep
if [ -x /usr/bin/beep ]; then /usr/bin/beep -f 2666; else echo -en "\a" >/dev/console; fi
fi
fi
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