#!/bin/sh # # init.ipv6-global # # # Taken from: init.ipv6-global # (P) & (C) 2001-2002 by Peter Bieringer # # You will find more information in the IPv6-HowTo for Linux at # http://www.bieringer.de/linux/IPv6/ # # RHL integration assistance by Pekka Savola # # Version 2002-01-25 # # 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) # 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= [optional] # IPV6_DEFAULTDEV= [optional] # # 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 $POSITION in pre) # IPv6 test, module loaded, exit if system is not IPv6-ready ipv6_test || exit 1 if [ "$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 # Reset IPv6 sysctl switches for "all", "default" and still existing devices sysctl -a | grep "^net\.ipv6\.conf\." | awk -F. '{ print $4 }' | sort | uniq | while read interface; do # Host/Router behaviour for the interface ipv6_exec_sysctl -w net.ipv6.conf.$interface.forwarding=$ipv6_global_forwarding >/dev/null # Autoconfiguration and redirect handling for Hosts ipv6_exec_sysctl -w net.ipv6.conf.$interface.accept_ra=$ipv6_global_auto >/dev/null ipv6_exec_sysctl -w net.ipv6.conf.$interface.accept_redirects=$ipv6_global_auto >/dev/null done ;; post) # IPv6 test, module loaded, exit if system is not IPv6-ready ipv6_test || exit 1 if [ "$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 ipv6_exec_ip route add unreach ::ffff:0.0.0.0/96 # Unreachable IPv4-mapped addresses ipv6_exec_ip route add unreach ::0.0.0.0/96 # Unreachable 6to4: IPv4 multicast, reserved, limited broadcast ipv6_exec_ip route add unreach 2002:e000::/19 # Unreachable 6to4: IPv4 loopback ipv6_exec_ip route add unreach 2002:7f00::/24 # Unreachable 6to4: IPv4 private (RFC 1918) ipv6_exec_ip route add unreach 2002:0a00::/24 ipv6_exec_ip route add unreach 2002:ac10::/28 ipv6_exec_ip route add unreach 2002:c0a8::/32 # Unreachable 6to4: IPv4 private (APIPA / DHCP link-local) ipv6_exec_ip route add unreach 2002:a9fe::/32 # Unreachable IPv6: 6bone test addresses ipv6_exec_ip route add unreach 3ffe:ffff::/32 # Set default route for autotunnel, if specified if [ "$IPV6_DEFAULTDEV" = "sit0" -a "$IPV6_AUTOTUNNEL" = "yes" ]; then if [ ! -z "$IPV6_DEFAULTGW" ]; then ipv6_set_default_route $IPV6_DEFAULTGW $IPV6_DEFAULTDEV sit0 elif [ ! -z "$IPV6_DEFAULTDEV" ]; then ipv6_set_default_route "" $IPV6_DEFAULTDEV sit0 fi fi ;; *) echo "Usage: $0 $1 {pre|post}" ;; esac ;; stop) case $POSITION in pre) # IPv6 test, no module loaded, exit if system is not IPv6-ready ipv6_test testonly || exit 0 ;; post) # IPv6 test, no module loaded, exit if system is not IPv6-ready ipv6_test testonly || exit 0 sysctl -a | grep "^net\.ipv6\.conf\." | awk -F. '{ print $4 }' | sort | uniq | while read interface; do # Assume Host behaviour ipv6_exec_sysctl -w net.ipv6.conf.$interface.forwarding=0 >/dev/null # Disable autoconfiguration and redirects ipv6_exec_sysctl -w net.ipv6.conf.$interface.accept_ra=0 >/dev/null ipv6_exec_sysctl -w net.ipv6.conf.$interface.accept_redirects=0 >/dev/null done # Cleanup still existing tunnel devices ipv6_cleanup_tunnel_devices # Shut down generic tunnel interface now ipv6_exec_ifconfig sit0 down ;; *) 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 ipv6_test testonly || exit 0 # Show sysctl switches sysctl -a | grep "^net\.ipv6\.conf\.default\." | awk -F. '{ print $5 }' | awk -F= '{ print $1 }' | sed 's/ //g' | while read switch; do sysctl -a | grep "^net\.ipv6\.conf\." | awk -F. '{ print $4 }' | sort | uniq | while read interface; do sysctl net.ipv6.conf.$interface.$switch done echo done ;; *) echo $"Usage: $0 {start|stop|reload|restart|showsysctl}" exit 1 ;; esac