etc/rc.d/routing

#!/bin/sh
#
# Configure routing and miscellaneous network tunables
#
# $FreeBSD: head/etc/rc.d/routing 197139 2009-09-12 22:13:41Z hrs $
#

# PROVIDE: routing
# REQUIRE: netif ppp
# KEYWORD: nojail

. /etc/rc.subr
. /etc/network.subr

name="routing"
start_cmd="routing_start"
stop_cmd="routing_stop"
extra_commands="options static"
static_cmd="static_start"
options_cmd="options_start"

routing_start()
{
	static_start "$@"
	options_start "$@"
}

routing_stop()
{
	static_stop "$@"
	route -n flush
	for i in ${ipv6_network_interfaces}; do
		ifconfig $i inet6 -defaultif
	done
}

static_start()
{
	local _af
	_af=$1

	case ${_af} in
	inet)
		do_static inet add
		;;
	inet6)
		do_static inet6 add
		;;
	atm)
		do_static atm add
		;;
	*)
		do_static inet add
		do_static inet6 add
		do_static atm add
		;;
	esac
}

static_stop()
{
	local _af
	_af=$1

	case ${_af} in
	inet)
		do_static inet delete
		;;
	inet6)
		do_static inet6 delete
		;;
	atm)
		do_static atm delete
		;;
	*)
		do_static inet delete
		do_static inet6 delete
		do_static atm delete
		;;
	esac
}

do_static()
{
	local _af _action
	_af=$1
	_action=$2

	eval $1_static $2
}

inet_static()
{
	local _action
	_action=$1

	case ${defaultrouter} in
	[Nn][Oo] | '')
		;;
	*)
		static_routes="default ${static_routes}"
		route_default="default ${defaultrouter}"
		;;
	esac

	if [ -n "${static_routes}" ]; then
		for i in ${static_routes}; do
			route_args=`get_if_var $i route_IF`
			route ${_action} ${route_args}
		done
	fi
}

inet6_static()
{
	local _action i
	_action=$1

	# disallow "internal" addresses to appear on the wire
	route ${_action} -inet6 ::ffff:0.0.0.0 -prefixlen 96 ::1 -reject
	route ${_action} -inet6 ::0.0.0.0 -prefixlen 96 ::1 -reject

	case ${ipv6_defaultrouter} in
	[Nn][Oo] | '')
		;;
	*)
		ipv6_static_routes="default ${ipv6_static_routes}"
		ipv6_route_default="default ${ipv6_defaultrouter}"
		;;
	esac

	if [ -n "${ipv6_static_routes}" ]; then
		for i in ${ipv6_static_routes}; do
			ipv6_route_args=`get_if_var $i ipv6_route_IF`
			route ${_action} -inet6 ${route_args}
		done
	fi

	# Fixup $ipv6_network_interfaces
	case ${ipv6_network_interfaces} in
	[Nn][Oo][Nn][Ee])
		ipv6_network_interfaces=''
		;;
	esac

	if checkyesno ipv6_gateway_enable; then
		for i in ${ipv6_network_interfaces}; do

			laddr=`network6_getladdr $i exclude_tentative`
			case ${laddr} in
			'')
				;;
			*)
				ipv6_working_interfaces="$i \
				    ${ipv6_working_interfaces}"
				;;
			esac
		done
		ipv6_network_interfaces=${ipv6_working_interfaces}
	fi

	# Install the "default interface" to kernel, which will be used
	# as the default route when there's no router.
	case "${ipv6_default_interface}" in
	[Nn][Oo] | [Nn][Oo][Nn][Ee])
		ipv6_default_interface=""
		;;
	[Aa][Uu][Tt][Oo] | "")
		for i in ${ipv6_network_interfaces}; do
			case $i in
			lo0|faith[0-9]*)
				continue
				;;
			esac
			laddr=`network6_getladdr $i exclude_tentative`
			case ${laddr} in
			'')
				;;
			*)
				ipv6_default_interface=$i
				break
				;;
			esac
		done
		;;
	esac

	# Disallow unicast packets without outgoing scope identifiers,
	# or route such packets to a "default" interface, if it is specified.
	route ${_action} -inet6 fe80:: -prefixlen 10 ::1 -reject

	case ${ipv6_default_interface} in
	'')
		route ${_action} -inet6 ff02:: -prefixlen 16 ::1 -reject
		;;
	*)
		laddr=`network6_getladdr ${ipv6_default_interface}`
		route ${_action} -inet6 ff02:: ${laddr} -prefixlen 16 -interface

		# Disable installing the default interface with the
		# case net.inet6.ip6.forwarding=0 and
		# the interface with no ND6_IFF_ACCEPT_RTADV
		# to avoid conflict between the default router list and
		# the manual configured default route.
		if ! checkyesno ipv6_gateway_enable; then
			ifconfig ${ipv6_default_interface} nd6 | \
			while read proto options
			do
				case "${proto}:${options}" in
				nd6:*ACCEPT_RTADV*)
					ifconfig ${ipv6_default_interface} inet6 defaultif
					break
				;;
				esac
			done
		fi
		;;
	esac
}

atm_static()
{
	local _action i
	_action=$1

	if [ -n "${natm_static_routes}" ]; then
		for i in ${natm_static_routes}; do
			route_args=`get_if_var $i route_IF`
			atmconfig natm ${_action} ${route_args}
		done
	fi
}

_ropts_initdone=
ropts_init()
{
	if [ -z "${_ropts_initdone}" ]; then
		echo -n 'Additional routing options:'
		_ropts_initdone=yes
	fi
}

options_start()
{
	if checkyesno icmp_bmcastecho; then
		ropts_init
		echo -n ' broadcast ping responses=YES'
		sysctl net.inet.icmp.bmcastecho=1 >/dev/null
	fi

	if checkyesno icmp_drop_redirect; then
		ropts_init
		echo -n ' ignore ICMP redirect=YES'
		sysctl net.inet.icmp.drop_redirect=1 >/dev/null
	fi

	if checkyesno icmp_log_redirect; then
		ropts_init
		echo -n ' log ICMP redirect=YES'
		sysctl net.inet.icmp.log_redirect=1 >/dev/null
	fi

	if checkyesno gateway_enable; then
		ropts_init
		echo -n ' IPv4 gateway=YES'
		sysctl net.inet.ip.forwarding=1 >/dev/null
	fi

	if checkyesno ipv6_gateway_enable; then
		ropts_init
		echo -n ' IPv6 gateway=YES'
		sysctl net.inet6.ip6.forwarding=1 >/dev/null
	fi

	if checkyesno forward_sourceroute; then
		ropts_init
		echo -n ' do source routing=YES'
		sysctl net.inet.ip.sourceroute=1 >/dev/null
	fi

	if checkyesno accept_sourceroute; then
		ropts_init
		echo -n ' accept source routing=YES'
		sysctl net.inet.ip.accept_sourceroute=1 >/dev/null
	fi

	if checkyesno ipxgateway_enable; then
		ropts_init
		echo -n ' IPX gateway=YES'
		sysctl net.ipx.ipx.ipxforwarding=1 >/dev/null
	fi

	if checkyesno arpproxy_all; then
		ropts_init
		echo -n ' ARP proxyall=YES'
		sysctl net.link.ether.inet.proxyall=1 >/dev/null
	fi

	 [ -n "${_ropts_initdone}" ] && echo '.'
}

load_rc_config $name
run_rc_command "$@"