# # Copyright (c) 2003 The FreeBSD 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 PROJECT 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 PROJECT 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: src/etc/network.subr,v 1.151 2003/06/24 03:55:21 kuriyama Exp $ # $DragonFly: src/etc/network.subr,v 1.1 2003/07/24 06:35:32 dillon Exp $ # # # Subroutines commonly used from network startup scripts. # Requires that rc.conf be loaded first. # # ifconfig_up if # Evaluate ifconfig(8) arguments for interface $if and # run ifconfig(8) with those arguments. It returns 0 if # arguments were found and executed or 1 if the interface # had no arguments. # ifconfig_up() { eval ifconfig_args=\$ifconfig_$1 if [ -n "${ifconfig_args}" ]; then ifconfig $1 ${ifconfig_args} return 0 fi return 1 } # ifconfig_down if # Remove all inet entries from the $if interface. It returns # 0 if inet entries were found and removed. It returns 1 if # no entries were found or they could not be removed. # ifconfig_down() { [ -z "$1" ] && return 1 _ifs="^" _ret=1 inetList="`ifconfig $1 | grep 'inet ' | tr "\n" "$_ifs"`" oldifs="$IFS" IFS="$_ifs" for _inet in $inetList ; do # get rid of extraneous line [ -z "$_inet" ] && break _inet=`expr "$_inet" : '.*\(inet \([0-9]\{1,3\}\.\)\{3\}[0-9]\{1,3\}\).*'` IFS="$oldifs" ifconfig $1 ${_inet} delete IFS="$_ifs" _ret=0 done IFS="$oldifs" return $_ret } # ifalias_up if # Configure aliases for network interface $if. # It returns 0 if at least one alias was configured or # 1 if there were none. # ifalias_up() { _ret=1 alias=0 while : ; do eval ifconfig_args=\$ifconfig_$1_alias${alias} if [ -n "${ifconfig_args}" ]; then ifconfig $1 ${ifconfig_args} alias alias=$((${alias} + 1)) _ret=0 else break fi done return $_ret } #ifalias_down if # Remove aliases for network interface $if. # It returns 0 if at least one alias was removed or # 1 if there were none. # ifalias_down() { _ret=1 alias=0 while : ; do eval ifconfig_args=\$ifconfig_$1_alias${alias} if [ -n "${ifconfig_args}" ]; then ifconfig $1 ${ifconfig_args} -alias alias=$((${alias} + 1)) _ret=0 else break fi done return $_ret } # ifscript_up if # Evaluate a startup script for the $if interface. # It returns 0 if a script was found and processed or # 1 if no script was found. # ifscript_up() { if [ -r /etc/start_if.$1 ]; then . /etc/start_if.$1 return 0 fi return 1 } # ifscript_down if # Evaluate a shutdown script for the $if interface. # It returns 0 if a script was found and processed or # 1 if no script was found. # ifscript_down() { if [ -r /etc/stop_if.$1 ]; then . /etc/stop_if.$1 return 0 fi return 1 } # Create cloneable interfaces. # clone_up() { _prefix= _list= for ifn in ${cloned_interfaces}; do ifconfig ${ifn} create if [ $? -eq 0 ]; then _list="${_list}${_prefix}${ifn}" [ -z "$_prefix" ] && _prefix=' ' fi done debug "Cloned: ${_list}" } # Destroy cloned interfaces. Destroyed interfaces are echoed # to standard output. # clone_down() { _prefix= _list= for ifn in ${cloned_interfaces}; do ifconfig ${ifn} destroy if [ $? -eq 0 ]; then _list="${_list}${_prefix}${ifn}" [ -z "$_prefix" ] && _prefix=' ' fi done debug "Destroyed clones: ${_list}" } gif_up() { case ${gif_interfaces} in [Nn][Oo] | '') ;; *) for i in ${gif_interfaces}; do eval peers=\$gifconfig_$i case ${peers} in '') continue ;; *) ifconfig $i create >/dev/null 2>&1 ifconfig $i tunnel ${peers} ifconfig $i up ;; esac done ;; esac } # # ipx_up ifn # Configure any IPX addresses for interface $ifn. Returns 0 if IPX # arguments were found and configured; returns 1 otherwise. # ipx_up() { ifn="$1" eval ifconfig_args=\$ifconfig_${ifn}_ipx if [ -n "${ifconfig_args}" ]; then ifconfig ${ifn} ${ifconfig_args} return 0 fi return 1 } # ipx_down ifn # Remove IPX addresses for interface $ifn. Returns 0 if IPX # addresses were found and unconfigured. It returns 1, otherwise. # ipx_down() { [ -z "$1" ] && return 1 _ifs="^" _ret=1 ipxList="`ifconfig $1 | grep 'ipx ' | tr "\n" "$_ifs"`" oldifs="$IFS" IFS="$_ifs" for _ipx in $ipxList ; do # get rid of extraneous line [ -z "$_ipx" ] && break _ipx=`expr "$_ipx" : '.*\(ipx [0-9a-h]\{1,8\}H*\.[0-9a-h]\{1,12\}\).*'` IFS="$oldifs" ifconfig $1 ${_ipx} delete IFS="$_ifs" _ret=0 done IFS="$oldifs" return $_ret } # # list_net_interfaces type # List all network interfaces. The type of interface returned # can be controlled by the type argument. The type # argument can be any of the following: # nodhcp - all interfaces, excluding DHCP configured interfaces # dhcp - list only DHCP configured interfaces # If no argument is specified all network interfaces are output. # Note that the list always includes cloned interfaces. # list_net_interfaces() { type=$1 # Get a list of ALL the interfaces # case ${network_interfaces} in [Aa][Uu][Tt][Oo]) _tmplist="`ifconfig -l`" ;; *) _tmplist="${network_interfaces}" ;; esac _tmplist="${_tmplist} ${cloned_interfaces}" if [ -z "$type" ]; then echo $_tmplist return 0 fi # Separate out dhcp and non-dhcp intefraces # _aprefix= _brefix= for _if in ${_tmplist} ; do eval _ifarg="\$ifconfig_${_if}" case "$_ifarg" in [Dd][Hh][Cc][Pp]) _dhcplist="${_dhcplist}${_aprefix}${_if}" [ -z "$_aprefix" ] && _aprefix=' ' ;; ''|*) _nodhcplist="${_nodhcplist}${_bprefix}${_if}" [ -z "$_bprefix" ] && _bprefix=' ' ;; esac done case "$type" in nodhcp) echo $_nodhcplist ;; dhcp) echo $_dhcplist ;; esac return 0 } 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 ${str} } # Setup the interfaces for IPv6 network6_interface_setup() { interfaces=$* 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 } # Setup IPv6 to IPv4 mapping 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 } # Setup static routes 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 } # Setup faith 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 } # Install the "default interface" to kernel, which will be used # as the default route when there's no router. 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 }