511 lines
11 KiB
Plaintext
511 lines
11 KiB
Plaintext
#
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# Copyright (c) 2003 The FreeBSD Project. 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 PROJECT 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 PROJECT 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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#
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# Subroutines commonly used from network startup scripts.
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# Requires that rc.conf be loaded first.
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#
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# ifconfig_up if
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# Evaluate ifconfig(8) arguments for interface $if and
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# run ifconfig(8) with those arguments. It returns 0 if
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# arguments were found and executed or 1 if the interface
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# had no arguments.
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#
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ifconfig_up()
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{
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eval ifconfig_args=\$ifconfig_$1
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if [ -n "${ifconfig_args}" ]; then
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ifconfig $1 ${ifconfig_args}
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return 0
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fi
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return 1
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}
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# ifalias_up if
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# Configure aliases for network interface $if.
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# It returns 0 if at least one alias was configured or
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# 1 if there were none.
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#
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ifalias_up()
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{
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_ret=1
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alias=0
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while : ; do
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eval ifconfig_args=\$ifconfig_$1_alias${alias}
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if [ -n "${ifconfig_args}" ]; then
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ifconfig $1 ${ifconfig_args} alias
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alias=$((${alias} + 1))
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_ret=0
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else
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break
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fi
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done
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return $_ret
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}
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# ifscript_up if
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# Evaluate a startup script for the $if interface.
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# It returns 0 if a script was found and processed or
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# 1 if no script was found.
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#
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ifscript_up()
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{
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if [ -r /etc/start_if.$1 ]; then
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. /etc/start_if.$1
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return 0
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fi
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return 1
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}
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# Create cloneable interfaces.
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#
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clone_up()
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{
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_prefix=
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_list=
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for ifn in ${cloned_interfaces}; do
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ifconfig ${ifn} create
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if $? ; then
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_list="${_list}${_prefix}${ifn}"
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[ -z "$_prefix" ] && _prefix=' '
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fi
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done
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debug "Cloned: ${_list}"
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}
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# Destroy cloned interfaces. Destroyed interfaces are echoed
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# to standard output.
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#
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clone_down()
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{
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_prefix=
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_list=
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for ifn in ${cloned_interfaces}; do
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ifconfig ${ifn} destroy
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if $? ; then
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_list="${_list}${_prefix}${ifn}"
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[ -z "$_prefix" ] && _prefix=' '
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fi
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done
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debug "Destroyed clones: ${_list}"
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}
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gif_up() {
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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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ifconfig $i create >/dev/null 2>&1
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ifconfig $i tunnel ${peers}
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ifconfig $i up
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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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#
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# ipx_up ifn
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# Configure any IPX addresses for interface $ifn. Returns 0 if IPX
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# arguments were found and configured; returns 1 otherwise.
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#
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ipx_up()
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{
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ifn="$1"
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eval ifconfig_args=\$ifconfig_${ifn}_ipx
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if [ -n "${ifconfig_args}" ]; then
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ifconfig ${ifn} ${ifconfig_args}
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return 0
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fi
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return 1
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}
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#
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# list_net_interfaces type
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# List all network interfaces. The type of interface returned
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# can be controlled by the type argument. The type
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# argument can be any of the following:
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# nodhcp - all interfaces, excluding DHCP configured interfaces
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# dhcp - list only DHCP configured interfaces
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# If no argument is specified all network interfaces are output.
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# Note that the list always includes cloned interfaces.
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#
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list_net_interfaces()
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{
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type=$1
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# Get a list of ALL the interfaces
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#
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case ${network_interfaces} in
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[Aa][Uu][Tt][Oo])
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_tmplist="`ifconfig -l`"
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;;
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*)
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_tmplist="${network_interfaces}"
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;;
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esac
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_tmplist="${_tmplist} ${cloned_interfaces}"
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if [ -z "$type" ]; then
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echo $_tmplist
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return 0
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fi
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# Separate out dhcp and non-dhcp intefraces
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#
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_aprefix=
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_brefix=
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for _if in ${_tmplist} ; do
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eval _ifarg="\$ifconfig_${_if}"
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case "$_ifarg" in
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[Dd][Hh][Cc][Pp])
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_dhcplist="${_dhcplist}${_aprefix}${_if}"
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[ -z "$_aprefix" ] && _aprefix=' '
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;;
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''|*)
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_nodhcplist="${_nodhcplist}${_bprefix}${_if}"
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[ -z "$_bprefix" ] && _bprefix=' '
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;;
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esac
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done
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case "$type" in
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nodhcp)
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echo $_nodhcplist
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;;
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dhcp)
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echo $_dhcplist
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;;
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esac
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return 0
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}
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hexdigit()
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{
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if [ $1 -lt 10 ]; then
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echo $1
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else
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case $1 in
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10) echo a ;;
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11) echo b ;;
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12) echo c ;;
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13) echo d ;;
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14) echo e ;;
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15) echo f ;;
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esac
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fi
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}
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hexprint()
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{
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val=$1
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str=''
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dig=`hexdigit $((${val} & 15))`
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str=${dig}${str}
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val=$((${val} >> 4))
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while [ ${val} -gt 0 ]; do
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dig=`hexdigit $((${val} & 15))`
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str=${dig}${str}
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val=$((${val} >> 4))
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done
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echo ${str}
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}
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# Setup the interfaces for IPv6
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network6_interface_setup()
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{
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interfaces=$*
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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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;;
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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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laddr=`network6_getladdr $i`
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hostid=`expr "${laddr}" : 'fe80::\(.*\)%\(.*\)'`
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for j in ${prefix}; do
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address=$j\:${hostid}
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ifconfig $i inet6 ${address} prefixlen 64 alias
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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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if [ ${rtsol_available} = yes -a ${rtsol_interface} = yes ]
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then
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case ${i} in
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lo0|gif[0-9]*|stf[0-9]*|faith[0-9]*|lp[0-9]*|sl[0-9]*|tun[0-9]*)
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;;
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*)
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rtsol_interfaces="${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 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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for i in $interfaces; do
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alias=0
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while : ; do
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eval ipv6_ifconfig=\$ipv6_ifconfig_${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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done
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}
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# Setup IPv6 to IPv4 mapping
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network6_stf_setup()
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{
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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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hexfrag1=`hexprint $(($1*256 + $2))`
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hexfrag2=`hexprint $(($3*256 + $4))`
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ipv4_in_hexformat="${hexfrag1}:${hexfrag2}"
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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 ${stf_interface_ipv6_ifid} in
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'')
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stf_interface_ipv6_ifid=0:0:0:1
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;;
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esac
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;;
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esac
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ifconfig stf0 create >/dev/null 2>&1
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ifconfig stf0 inet6 2002:${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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# Setup static routes
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network6_static_routes_setup()
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{
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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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# Setup faith
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network6_faith_setup()
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{
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case ${ipv6_faith_prefix} in
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[Nn][Oo] | '')
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;;
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*)
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sysctl net.inet6.ip6.keepfaith=1
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ifconfig faith0 create >/dev/null 2>&1
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ifconfig faith0 up
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for prefix in ${ipv6_faith_prefix}; do
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prefixlen=`expr "${prefix}" : ".*/\(.*\)"`
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case ${prefixlen} in
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'')
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prefixlen=96
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;;
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*)
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prefix=`expr "${prefix}" : \
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"\(.*\)/${prefixlen}"`
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;;
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esac
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route add -inet6 ${prefix} -prefixlen ${prefixlen} ::1
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route change -inet6 ${prefix} -prefixlen ${prefixlen} \
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-ifp faith0
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done
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;;
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esac
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}
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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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{
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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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case $i in
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lo0|faith[0-9]*)
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continue
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;;
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esac
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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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{
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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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