#! /bin/sh
#
# Copyright (c) 2000 The KAME Project
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# $FreeBSD$
#
# Note that almost all of the user-configurable behavior is not in this
# file, but rather in /etc/defaults/rc.conf. Please check that file
# first before contemplating any changes here. If you do need to change
# this file for some reason, we would like to know about it.
hexdigit () {
if [ $1 -lt 10 ]; then
echo $1
else
case $1 in
10) echo a ;;
11) echo b ;;
12) echo c ;;
13) echo d ;;
14) echo e ;;
15) echo f ;;
esac
fi
}
hexprint () {
val=$1
str=''
dig=`hexdigit $((${val} & 15))`
str=${dig}${str}
val=$((${val} >> 4))
while [ ${val} -gt 0 ]; do
dig=`hexdigit $((${val} & 15))`
str=${dig}${str}
val=$((${val} >> 4))
done
echo ${str}
}
# IPv6 startup
network6_pass1() {
echo -n 'Doing IPv6 network setup:'
# Initialize IP filtering using ip6fw
#
if /sbin/ip6fw -q flush > /dev/null 2>&1; then
ipv6_firewall_in_kernel=1
else
ipv6_firewall_in_kernel=0
fi
case ${ipv6_firewall_enable} in
[Yy][Ee][Ss])
if [ "${ipv6_firewall_in_kernel}" -eq 0 ] && kldload ip6fw; then
ipv6_firewall_in_kernel=1
echo "Kernel IPv6 firewall module loaded."
elif [ "${ipv6_firewall_in_kernel}" -eq 0 ]; then
echo "Warning: IPv6 firewall kernel module failed to load."
fi
;;
esac
# Load the filters if required
#
case ${ipv6_firewall_in_kernel} in
1)
if [ -z "${ipv6_firewall_script}" ]; then
ipv6_firewall_script=/etc/rc.firewall6
fi
case ${ipv6_firewall_enable} in
[Yy][Ee][Ss])
if [ -r "${ipv6_firewall_script}" ]; then
. "${ipv6_firewall_script}"
echo -n 'IPv6 Firewall rules loaded.'
elif [ "`ip6fw l 65535`" = "65535 deny ipv6 from any to any" ]; then
echo -n "Warning: kernel has IPv6 firewall functionality, "
echo "but IPv6 firewall rules are not enabled."
echo " All ipv6 services are disabled."
fi
case ${ipv6_firewall_logging} in
[Yy][Ee][Ss] | '')
echo 'IPv6 Firewall logging=YES'
sysctl net.inet6.ip6.fw.verbose=1 >/dev/null
;;
*)
;;
esac
;;
esac
;;
esac
case ${ipv6_network_interfaces} in
[Aa][Uu][Tt][Oo])
#
# list of interfaces, and prefix for interfaces
#
ipv6_network_interfaces="`ifconfig -l`"
;;
[Nn][Oo][Nn][Ee])
ipv6_network_interfaces=''
;;
esac
# just to make sure
ifconfig lo0 up
# disallow "internal" addresses to appear on the wire
route add -inet6 ::ffff:0.0.0.0 -prefixlen 96 ::1 -reject
route add -inet6 ::0.0.0.0 -prefixlen 96 ::1 -reject
case ${ipv6_gateway_enable} in
[Yy][Ee][Ss])
# act as a router
sysctl net.inet6.ip6.forwarding=1
sysctl net.inet6.ip6.accept_rtadv=0
# wait for DAD
for i in $ipv6_network_interfaces; do
ifconfig $i up
done
sleep `sysctl -n net.inet6.ip6.dad_count`
sleep 1
;;
*)
# act as endhost - start with manual configuration
# Setup of net.inet6.ip6.accept_rtadv is done later by
# network6_interface_setup.
sysctl net.inet6.ip6.forwarding=0
;;
esac
if [ -n "${ipv6_network_interfaces}" ]; then
# setting up interfaces
network6_interface_setup $ipv6_network_interfaces
# wait for DAD's completion (for global addrs)
sleep `sysctl -n net.inet6.ip6.dad_count`
sleep 1
fi
case ${ipv6_gateway_enable} in
[Yy][Ee][Ss])
# Filter out interfaces on which IPv6 addr init failed.
ipv6_working_interfaces=""
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}
;;
esac
# 6to4 setup
network6_stf_setup
# install the "default interface" to kernel, which will be used
# as the default route when there's no router.
network6_default_interface_setup
# setup static routes
network6_static_routes_setup
# setup faith
network6_faith_setup
# ipv6_router
case ${ipv6_router_enable} in
[Yy][Ee][Ss])
if [ -x ${ipv6_router} ]; then
echo -n " ${ipv6_router}"
${ipv6_router} ${ipv6_router_flags}
fi
;;
esac
case ${ipv6_gateway_enable} in
[Yy][Ee][Ss])
# rtadvd
# This should enabled with a great care.
# You may want to fine-tune /etc/rtadvd.conf.
#
# And if you wish your rtadvd to receive and process
# router renumbering messages, specify your Router Renumbering
# security policy by -R option.
#
# See `man 3 ipsec_set_policy` for IPsec policy specification
# details.
# (CAUTION: This enables your routers prefix renumbering
# from another machine, so if you enable this, do it with
# enough care.)
#
case ${rtadvd_enable} in
[Yy][Ee][Ss])
# default
case ${rtadvd_interfaces} in
'')
for i in ${ipv6_network_interfaces}; do
case $i in
lo0|gif[0-9]*|stf[0-9]*|faith[0-9]*|lp[0-9]*|sl[0-9]*|tun[0-9]*)
continue
;;
*)
rtadvd_interfaces="${rtadvd_interfaces} ${i}"
;;
esac
done
;;
esac
rtadvd ${rtadvd_interfaces}
#
# Enable Router Renumbering, unicast case
# (use correct src/dst addr)
# rtadvd -R "in ipsec ah/transport/fec0:0:0:1::1-fec0:0:0:10::1/require" \
# ${ipv6_network_interfaces}
# Enable Router Renumbering, multicast case
# (use correct src addr)
# rtadvd -R "in ipsec ah/transport/ff05::2-fec0:0:0:10::1/require" \
# ${ipv6_network_interfaces}
;;
esac
# mroute6d
case ${mroute6d_enable} in
[Yy][Ee][Ss])
if [ -x ${mroute6d_program} ]; then
echo -n " ${mroute6d_program}"
${mroute6d_program} ${mroute6d_flags}
fi
;;
esac
;;
esac
case ${ipv6_ipv4mapping} in
[Yy][Ee][Ss])
echo -n ' IPv4 mapped IPv6 address support=YES'
sysctl net.inet6.ip6.v6only=0 >/dev/null
;;
'' | *)
echo -n ' IPv4 mapped IPv6 address support=NO'
sysctl net.inet6.ip6.v6only=1 >/dev/null
;;
esac
echo '.'
# Let future generations know we made it.
#
network6_pass1_done=YES
}
network6_interface_setup() {
interfaces=$*
rtsol_interfaces=''
case ${ipv6_gateway_enable} in
[Yy][Ee][Ss])
rtsol_available=no
;;
*)
rtsol_available=yes
;;
esac
for i in $interfaces; do
rtsol_interface=yes
eval prefix=\$ipv6_prefix_$i
if [ -n "${prefix}" ]; then
rtsol_available=no
rtsol_interface=no
laddr=`network6_getladdr $i`
hostid=`expr "${laddr}" : 'fe80::\(.*\)%\(.*\)'`
for j in ${prefix}; do
address=$j\:${hostid}
ifconfig $i inet6 ${address} prefixlen 64 alias
case ${ipv6_gateway_enable} in
[Yy][Ee][Ss])
# subnet-router anycast address
# (rfc2373)
ifconfig $i inet6 $j:: prefixlen 64 \
alias anycast
;;
esac
done
fi
eval ipv6_ifconfig=\$ipv6_ifconfig_$i
if [ -n "${ipv6_ifconfig}" ]; then
rtsol_available=no
rtsol_interface=no
ifconfig $i inet6 ${ipv6_ifconfig} alias
fi
if [ ${rtsol_available} = yes -a ${rtsol_interface} = yes ]
then
case ${i} in
lo0|gif[0-9]*|stf[0-9]*|faith[0-9]*|lp[0-9]*|sl[0-9]*|tun[0-9]*)
;;
*)
rtsol_interfaces="${rtsol_interfaces} ${i}"
;;
esac
else
ifconfig $i inet6
fi
done
if [ ${rtsol_available} = yes -a -n "${rtsol_interfaces}" ]; then
# Act as endhost - automatically configured.
# You can configure only single interface, as
# specification assumes that autoconfigured host has
# single interface only.
sysctl net.inet6.ip6.accept_rtadv=1
set ${rtsol_interfaces}
ifconfig $1 up
rtsol $1
fi
for i in $interfaces; do
alias=0
while : ; do
eval ipv6_ifconfig=\$ipv6_ifconfig_${i}_alias${alias}
if [ -z "${ipv6_ifconfig}" ]; then
break;
fi
ifconfig $i inet6 ${ipv6_ifconfig} alias
alias=$((${alias} + 1))
done
done
}
network6_stf_setup() {
case ${stf_interface_ipv4addr} in
[Nn][Oo] | '')
;;
*)
# assign IPv6 addr and interface route for 6to4 interface
stf_prefixlen=$((16+${stf_interface_ipv4plen:-0}))
OIFS="$IFS"
IFS=".$IFS"
set ${stf_interface_ipv4addr}
IFS="$OIFS"
hexfrag1=`hexprint $(($1*256 + $2))`
hexfrag2=`hexprint $(($3*256 + $4))`
ipv4_in_hexformat="${hexfrag1}:${hexfrag2}"
case ${stf_interface_ipv6_ifid} in
[Aa][Uu][Tt][Oo] | '')
for i in ${ipv6_network_interfaces}; do
laddr=`network6_getladdr ${i}`
case ${laddr} in
'')
;;
*)
break
;;
esac
done
stf_interface_ipv6_ifid=`expr "${laddr}" : \
'fe80::\(.*\)%\(.*\)'`
case ${stf_interface_ipv6_ifid} in
'')
stf_interface_ipv6_ifid=0:0:0:1
;;
esac
;;
esac
ifconfig stf0 create >/dev/null 2>&1
ifconfig stf0 inet6 2002:${ipv4_in_hexformat}:${stf_interface_ipv6_slaid:-0}:${stf_interface_ipv6_ifid} \
prefixlen ${stf_prefixlen}
# disallow packets to malicious 6to4 prefix
route add -inet6 2002:e000:: -prefixlen 20 ::1 -reject
route add -inet6 2002:7f00:: -prefixlen 24 ::1 -reject
route add -inet6 2002:0000:: -prefixlen 24 ::1 -reject
route add -inet6 2002:ff00:: -prefixlen 24 ::1 -reject
;;
esac
}
network6_static_routes_setup() {
# Set up any static routes.
case ${ipv6_defaultrouter} in
[Nn][Oo] | '')
;;
*)
ipv6_static_routes="default ${ipv6_static_routes}"
ipv6_route_default="default ${ipv6_defaultrouter}"
;;
esac
case ${ipv6_static_routes} in
[Nn][Oo] | '')
;;
*)
for i in ${ipv6_static_routes}; do
eval ipv6_route_args=\$ipv6_route_${i}
route add -inet6 ${ipv6_route_args}
done
;;
esac
}
network6_faith_setup() {
case ${ipv6_faith_prefix} in
[Nn][Oo] | '')
;;
*)
sysctl net.inet6.ip6.keepfaith=1
ifconfig faith0 create >/dev/null 2>&1
ifconfig faith0 up
for prefix in ${ipv6_faith_prefix}; do
prefixlen=`expr "${prefix}" : ".*/\(.*\)"`
case ${prefixlen} in
'')
prefixlen=96
;;
*)
prefix=`expr "${prefix}" : \
"\(.*\)/${prefixlen}"`
;;
esac
route add -inet6 ${prefix} -prefixlen ${prefixlen} ::1
route change -inet6 ${prefix} -prefixlen ${prefixlen} \
-ifp faith0
done
;;
esac
}
network6_default_interface_setup() {
# Choose IPv6 default interface if it is not clearly specified.
case ${ipv6_default_interface} in
'')
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 add -inet6 fe80:: -prefixlen 10 ::1 -reject
case ${ipv6_default_interface} in
[Nn][Oo] | '')
route add -inet6 ff02:: -prefixlen 16 ::1 -reject
;;
*)
laddr=`network6_getladdr ${ipv6_default_interface}`
route add -inet6 ff02:: ${laddr} -prefixlen 16 -interface \
-cloning
# Disable installing the default interface with the
# case net.inet6.ip6.forwarding=0 and
# net.inet6.ip6.accept_rtadv=0, due to avoid conflict
# between the default router list and the manual
# configured default route.
case ${ipv6_gateway_enable} in
[Yy][Ee][Ss])
;;
*)
if [ `sysctl -n net.inet6.ip6.accept_rtadv` -eq 1 ]
then
ndp -I ${ipv6_default_interface}
fi
;;
esac
;;
esac
}
network6_getladdr() {
ifconfig $1 2>/dev/null | while read proto addr rest; do
case ${proto} in
inet6)
case ${addr} in
fe80::*)
if [ -z "$2" ]; then
echo ${addr}
return
fi
case ${rest} in
*tentative*)
continue
;;
*)
echo ${addr}
return
esac
esac
esac
done
}
