#!/bin/bash

#

# init.ipv6-global

#

#

# Taken from: init.ipv6-global

# (P) & (C) 2001-2005 by Peter Bieringer <pb@bieringer.de>

#

#  You will find more information on the initscripts-ipv6 homepage at

#   http://www.deepspace6.net/projects/initscripts-ipv6.html

#

# RHL integration assistance by Pekka Savola <pekkas@netcore.fi>

#

# Version: 2005-01-04

#

# 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:

#  IPV6FORWARDING=yes|no: controls global IPv6 forwarding (default: no)

#  IPV6_AUTOCONF=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)

#  IPV6_DEFAULTGW=<ipv6address[%interface]> [optional]

#  IPV6_DEFAULTDEV=<interface> [optional]

#

. /etc/sysconfig/network

cd /etc/sysconfig/network-scripts

. ./network-functions

# Get action and hook position

ACTION="$1"

POSITION="$2"

[ -f /etc/sysconfig/network-scripts/network-functions-ipv6 ] || exit 1

. /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

        ipv6_test || exit 1

        if [ "$IPV6FORWARDING" = "yes" ]; then

            ipv6_global_forwarding=1

            ipv6_global_auto=0

        else

            ipv6_global_forwarding=0

            if [ "$IPV6_AUTOCONF" = "no" ]; then

                ipv6_global_auto=0

            else

                ipv6_global_auto=1

            fi

        fi

        if [ ! "$IPV6_SET_SYSCTLS" = "no" ]; then

            # Reset IPv6 sysctl switches for "all", "default" and still existing devices

            for i in /proc/sys/net/ipv6/conf/* ; do

                interface=${i##*/}

                sinterface=${interface/.//}

                # Host/Router behaviour for the interface

                /sbin/sysctl -e -w net.ipv6.conf.$sinterface.forwarding=$ipv6_global_forwarding >/dev/null 2>&1

                # Autoconfiguration and redirect handling for Hosts

                /sbin/sysctl -e -w net.ipv6.conf.$sinterface.accept_ra=$ipv6_global_auto >/dev/null 2>&1

                /sbin/sysctl -e -w net.ipv6.conf.$sinterface.accept_redirects=$ipv6_global_auto >/dev/null 2>&1

            done

        fi

        ;;

    post)

        # IPv6 test, module loaded, exit if system is not IPv6-ready

        ipv6_test || exit 1

        if [ "$IPV6_AUTOTUNNEL" = "yes" ]; then

            ipv6_enable_autotunnel

            # autotunnel interface doesn't require a MTU setup

        fi

        ## Add some routes which should never appear on the wire

        # Unreachable IPv4-only addresses, normally blocked by source address selection

        /sbin/ip route add unreach    ::ffff:0.0.0.0/96

        # Unreachable IPv4-mapped addresses

        /sbin/ip route add unreach    ::0.0.0.0/96

        # Unreachable 6to4: IPv4 multicast, reserved, limited broadcast

        /sbin/ip route add unreach    2002:e000::/19

        # Unreachable 6to4: IPv4 loopback

        /sbin/ip route add unreach    2002:7f00::/24

        # Unreachable 6to4: IPv4 private (RFC 1918)

        /sbin/ip route add unreach    2002:0a00::/24

        /sbin/ip route add unreach    2002:ac10::/28

        /sbin/ip route add unreach    2002:c0a8::/32

        # Unreachable 6to4: IPv4 private (APIPA / DHCP link-local)

        /sbin/ip route add unreach    2002:a9fe::/32

        # Unreachable IPv6: 6bone test addresses

        /sbin/ip route add unreach    3ffe:ffff::/32

        # Set default route for autotunnel, if specified

        if [ "$IPV6_DEFAULTDEV" = "sit0" -a "$IPV6_AUTOTUNNEL" = "yes" ]; then

            if [ -n "$IPV6_DEFAULTGW" ]; then

                ipv6_set_default_route $IPV6_DEFAULTGW $IPV6_DEFAULTDEV sit0

            elif [ -n "$IPV6_DEFAULTDEV" ]; then

                ipv6_set_default_route "" $IPV6_DEFAULTDEV sit0

            fi

        fi

        ;;

    *)

        echo "Usage: $0 $1 {pre|post}"

        ;;

    esac

    ;;

stop)

    case $POSITION in

    pre)

        ;;

    post)

        # IPv6 test, no module loaded, exit if system is not IPv6-ready

        ipv6_test testonly || exit 0

        if [ ! "$IPV6_SET_SYSCTLS" = "no" ]; then

            for i in /proc/sys/net/ipv6/conf/* ; do

                interface=${i##*/}

                sinterface=${interface/.//}

                # Assume Host behaviour

                /sbin/sysctl -e -w net.ipv6.conf.$sinterface.forwarding=0 >/dev/null 2>&1

                # Disable autoconfiguration and redirects

                /sbin/sysctl -e -w net.ipv6.conf.$sinterface.accept_ra=0 >/dev/null 2>&1

                /sbin/sysctl -e -w net.ipv6.conf.$sinterface.accept_redirects=0 >/dev/null 2>&1

            done

        fi

        # Cleanup still existing tunnel devices

        ipv6_cleanup_tunnel_devices

        # Shut down generic tunnel interface now

        if ipv6_test_device_status sit0 ; then

            /sbin/ip link set sit0 down

        fi

        ;;

    *)

        echo "Usage: $0 $1 {pre|post}"

        ;;

    esac

    ;;

*)

    echo $"Usage: $0 {start|stop|reload|restart|showsysctl}"

    exit 1

    ;;

esac