500 lines
12 KiB
Bash
500 lines
12 KiB
Bash
#! /bin/sh
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#
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# Copyright (c) 2000 The KAME Project
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# $FreeBSD$
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#
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# Note that almost all of the user-configurable behavior is not in this
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# file, but rather in /etc/defaults/rc.conf. Please check that file
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# first before contemplating any changes here. If you do need to change
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# this file for some reason, we would like to know about it.
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# IPv6 startup
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network6_pass1() {
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echo -n 'Doing IPv6 network setup:'
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# Initialize IP filtering using ip6fw
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#
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if /sbin/ip6fw -q flush > /dev/null 2>&1; then
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ipv6_firewall_in_kernel=1
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else
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ipv6_firewall_in_kernel=0
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fi
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case ${ipv6_firewall_enable} in
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[Yy][Ee][Ss])
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if [ "${ipv6_firewall_in_kernel}" -eq 0 ] && kldload ip6fw; then
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ipv6_firewall_in_kernel=1
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echo "Kernel IPv6 firewall module loaded."
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elif [ "${ipv6_firewall_in_kernel}" -eq 0 ]; then
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echo "Warning: IPv6 firewall kernel module failed to load."
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fi
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;;
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esac
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# Load the filters if required
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#
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case ${ipv6_firewall_in_kernel} in
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1)
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if [ -z "${ipv6_firewall_script}" ]; then
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ipv6_firewall_script=/etc/rc.firewall6
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fi
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case ${ipv6_firewall_enable} in
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[Yy][Ee][Ss])
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if [ -r "${ipv6_firewall_script}" ]; then
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. "${ipv6_firewall_script}"
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echo -n 'IPv6 Firewall rules loaded.'
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elif [ "`ip6fw l 65535`" = "65535 deny ipv6 from any to any" ]; then
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echo -n "Warning: kernel has IPv6 firewall functionality, "
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echo "but IPv6 firewall rules are not enabled."
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echo " All ipv6 services are disabled."
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fi
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case ${ipv6_firewall_logging} in
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[Yy][Ee][Ss] | '')
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echo 'IPv6 Firewall logging=YES'
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sysctl -w net.inet6.ip6.fw.verbose=1 >/dev/null
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;;
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*)
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;;
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esac
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;;
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esac
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;;
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esac
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case ${ipv6_network_interfaces} in
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[Aa][Uu][Tt][Oo])
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#
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# list of interfaces, and prefix for interfaces
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#
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ipv6_network_interfaces="`ifconfig -l`"
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;;
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esac
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# just to make sure
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ifconfig lo0 up
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# disallow "internal" addresses to appear on the wire
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route add -inet6 ::ffff:0.0.0.0 -prefixlen 96 ::1 -reject
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route add -inet6 ::0.0.0.0 -prefixlen 96 ::1 -reject
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case ${ipv6_gateway_enable} in
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[Yy][Ee][Ss])
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# act as a router
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sysctl -w net.inet6.ip6.forwarding=1
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sysctl -w net.inet6.ip6.accept_rtadv=0
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# wait for DAD
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for i in $ipv6_network_interfaces; do
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ifconfig $i up
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done
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sleep `sysctl -n net.inet6.ip6.dad_count`
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sleep 1
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;;
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*)
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# act as endhost - start with manual configuration
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sysctl -w net.inet6.ip6.forwarding=0
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sysctl -w net.inet6.ip6.accept_rtadv=0
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;;
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esac
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# gifconfig
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network6_gif_setup
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# setting up interfaces
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network6_interface_setup $ipv6_network_interfaces
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# wait for DAD's completion (for global addrs)
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sleep `sysctl -n net.inet6.ip6.dad_count`
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sleep 1
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case ${ipv6_gateway_enable} in
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[Yy][Ee][Ss])
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# Filter out interfaces on which IPv6 addr init failed.
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ipv6_working_interfaces=""
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for i in ${ipv6_network_interfaces}; do
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laddr=`network6_getladdr $i exclude_tentative`
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case ${laddr} in
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'')
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;;
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*)
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ipv6_working_interfaces="$i \
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${ipv6_working_interfaces}"
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;;
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esac
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done
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ipv6_network_interfaces=${ipv6_working_interfaces}
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;;
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esac
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# 6to4 setup
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network6_stf_setup
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# install the "default interface" to kernel, which will be used
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# as the default route when there's no router.
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network6_default_interface_setup
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# setup static routes
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network6_static_routes_setup
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case ${ipv6_gateway_enable} in
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[Yy][Ee][Ss])
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# ipv6_router
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case ${ipv6_router_enable} in
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[Yy][Ee][Ss])
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if [ -x ${ipv6_router} ]; then
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echo -n " ${ipv6_router}"
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${ipv6_router} ${ipv6_router_flags}
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fi
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;;
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esac
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# rtadvd
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# This should enabled with a great care.
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# You may want to fine-tune /etc/rtadvd.conf.
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#
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# And if you wish your rtadvd to receive and process
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# router renumbering messages, specify your Router Renumbering
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# security policy by -R option.
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#
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# See `man 3 ipsec_set_policy` for IPsec policy specification
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# details.
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# (CAUTION: This enables your routers prefix renumbering
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# from another machine, so if you enable this, do it with
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# enough care.)
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#
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case ${rtadvd_enable} in
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[Yy][Ee][Ss])
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# default
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case ${rtadvd_interfaces} in
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'')
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for i in ${ipv6_network_interfaces}; do
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case $i in
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lo0|gif*|stf*|faith*)
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continue
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;;
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*)
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rtadvd_interfaces="${rtadvd_interfaces} ${i}"
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;;
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esac
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done
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;;
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esac
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rtadvd ${rtadvd_interfaces}
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#
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# Enable Router Renumbering, unicast case
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# (use correct src/dst addr)
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# rtadvd -R "in ipsec ah/transport/fec0:0:0:1::1-fec0:0:0:10::1/require" \
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# ${ipv6_network_interfaces}
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# Enable Router Renumbering, multicast case
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# (use correct src addr)
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# rtadvd -R "in ipsec ah/transport/ff05::2-fec0:0:0:10::1/require" \
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# ${ipv6_network_interfaces}
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;;
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esac
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# mroute6d
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case ${mroute6d_enable} in
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[Yy][Ee][Ss])
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if [ -x ${mroute6d_program} ]; then
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echo -n " ${mroute6d_program}"
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${mroute6d_program} ${mroute6d_flags}
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fi
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;;
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esac
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;;
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esac
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case ${ipv6_ipv4mapping} in
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[Yy][Ee][Ss])
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echo -n ' IPv4 mapped IPv6 address support=YES'
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sysctl -w net.inet6.ip6.mapped_addr=1 >/dev/null
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;;
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'' | *)
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echo -n ' IPv4 mapped IPv6 address support=NO'
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sysctl -w net.inet6.ip6.mapped_addr=0 >/dev/null
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;;
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esac
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echo '.'
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# Let future generations know we made it.
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#
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network6_pass1_done=YES
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}
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network6_interface_setup() {
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interfaces=$*
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rtsol_interfaces=''
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case ${ipv6_gateway_enable} in
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[Yy][Ee][Ss])
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rtsol_available=no
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;;
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*)
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rtsol_available=yes
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prefixcmd_enable=NO
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;;
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esac
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for i in $interfaces; do
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rtsol_interface=yes
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eval prefix=\$ipv6_prefix_$i
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if [ -n "${prefix}" ]; then
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rtsol_available=no
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rtsol_interface=no
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for j in ${prefix}; do
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case ${prefixcmd_enable} in
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[Yy][Ee][Ss])
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prefix $i $j::
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;;
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*)
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laddr=`network6_getladdr $i`
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hostid=`expr "${laddr}" : \
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'fe80::\(.*\)%\(.*\)'`
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address=$j\:${hostid}
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eval hostid_$i=${hostid}
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eval address_$i=${address}
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ifconfig $i inet6 ${address} \
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prefixlen 64 alias
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;;
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esac
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case ${ipv6_gateway_enable} in
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[Yy][Ee][Ss])
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# subnet-router anycast address
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# (rfc2373)
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ifconfig $i inet6 $j:: prefixlen 64 \
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alias anycast
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;;
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esac
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done
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fi
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eval ipv6_ifconfig=\$ipv6_ifconfig_$i
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if [ -n "${ipv6_ifconfig}" ]; then
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rtsol_available=no
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rtsol_interface=no
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ifconfig $i inet6 ${ipv6_ifconfig} alias
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fi
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alias=0
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while : ; do
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eval ipv6_ifconfig=\$ipv6_ifconfig_${i}_alias${alias}
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if [ -z "${ipv6_ifconfig}" ]; then
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break;
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fi
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ifconfig $i inet6 ${ipv6_ifconfig} alias
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alias=$((${alias} + 1))
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done
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if [ ${rtsol_available} = yes -a ${rtsol_interface} = yes ]
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then
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case ${i} in
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lo0|gif*|stf*|faith*)
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;;
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*)
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rtsol_interfaces="${rtsol_interfaces} ${i}"
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;;
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esac
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else
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ifconfig $i inet6
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fi
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done
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if [ ${rtsol_available} = yes -a -n "${rtsol_interfaces}" ]; then
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# Act as endhost - automatically configured.
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# You can configure only single interface, as
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# specification assumes that autoconfigured host has
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# single interface only.
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sysctl -w net.inet6.ip6.accept_rtadv=1
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set ${rtsol_interfaces}
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ifconfig $1 up
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rtsol $1
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fi
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}
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network6_gif_setup() {
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case ${gif_interfaces} in
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[Nn][Oo] | '')
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;;
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*)
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for i in ${gif_interfaces}; do
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eval peers=\$gifconfig_$i
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case ${peers} in
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'')
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continue
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;;
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*)
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gifconfig $i ${peers}
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;;
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esac
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done
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;;
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esac
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}
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network6_stf_setup() {
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case ${stf_interface_ipv4addr} in
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[Nn][Oo] | '')
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;;
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*)
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# assign IPv6 addr and interface route for 6to4 interface
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stf_prefixlen=$((16+${stf_interface_ipv4plen:-0}))
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OIFS="$IFS"
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IFS=".$IFS"
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set ${stf_interface_ipv4addr}
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IFS="$OIFS"
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ipv4_in_hexformat=`printf "%x:%x\n" \
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$(($1*256 + $2)) $(($3*256 + $4))`
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case ${stf_interface_ipv6_ifid} in
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[Aa][Uu][Tt][Oo] | '')
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for i in ${ipv6_network_interfaces}; do
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laddr=`network6_getladdr ${i}`
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case ${laddr} in
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'')
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;;
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*)
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break
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;;
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esac
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done
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stf_interface_ipv6_ifid=`expr "${laddr}" : \
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'fe80::\(.*\)%\(.*\)'`
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case ${stf_interface_ipv6_ifid} in
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'')
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stf_interface_ipv6_ifid=0:0:0:1
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;;
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esac
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;;
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esac
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ifconfig stf0 inet6 2002:${ipv4_in_hexformat}:${stf_interface_ipv6_slaid:-0}:${stf_interface_ipv6_ifid} \
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prefixlen ${stf_prefixlen}
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# disallow packets to malicious 6to4 prefix
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route add -inet6 2002:e000:: -prefixlen 20 ::1 -reject
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route add -inet6 2002:7f00:: -prefixlen 24 ::1 -reject
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route add -inet6 2002:0000:: -prefixlen 24 ::1 -reject
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route add -inet6 2002:ff00:: -prefixlen 24 ::1 -reject
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;;
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esac
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}
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network6_static_routes_setup() {
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# Set up any static routes.
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case ${ipv6_defaultrouter} in
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[Nn][Oo] | '')
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;;
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*)
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ipv6_static_routes="default ${ipv6_static_routes}"
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ipv6_route_default="default ${ipv6_defaultrouter}"
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;;
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esac
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case ${ipv6_static_routes} in
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[Nn][Oo] | '')
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;;
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*)
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for i in ${ipv6_static_routes}; do
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eval ipv6_route_args=\$ipv6_route_${i}
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route add -inet6 ${ipv6_route_args}
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done
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;;
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esac
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}
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network6_default_interface_setup() {
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# Choose IPv6 default interface if it is not clearly specified.
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case ${ipv6_default_interface} in
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'')
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for i in ${ipv6_network_interfaces}; do
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laddr=`network6_getladdr $i exclude_tentative`
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case ${laddr} in
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'')
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;;
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*)
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ipv6_default_interface=$i
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break
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;;
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esac
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done
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;;
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esac
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# Disallow unicast packets without outgoing scope identifiers,
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# or route such packets to a "default" interface, if it is specified.
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route add -inet6 fe80:: -prefixlen 10 ::1 -reject
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case ${ipv6_default_interface} in
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[Nn][Oo] | '')
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route add -inet6 ff02:: -prefixlen 16 ::1 -reject
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;;
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*)
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laddr=`network6_getladdr ${ipv6_default_interface}`
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route add -inet6 ff02:: ${laddr} -prefixlen 16 -interface \
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-cloning
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# Disable installing the default interface with the
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# case net.inet6.ip6.forwarding=0 and
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# net.inet6.ip6.accept_rtadv=0, due to avoid conflict
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# between the default router list and the manual
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# configured default route.
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case ${ipv6_gateway_enable} in
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[Yy][Ee][Ss])
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;;
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*)
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if [ `sysctl -n net.inet6.ip6.accept_rtadv` -eq 1 ]
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then
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ndp -I ${ipv6_default_interface}
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fi
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;;
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esac
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;;
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esac
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}
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network6_getladdr() {
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ifconfig $1 2>/dev/null | while read proto addr rest; do
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case ${proto} in
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inet6)
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case ${addr} in
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fe80::*)
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if [ -z "$2" ]; then
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echo ${addr}
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return
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fi
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case ${rest} in
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*tentative*)
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continue
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;;
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*)
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echo ${addr}
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return
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esac
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esac
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esac
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done
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}
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