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#
# 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 1.163 2005/06/30 04:52:47 brooks Exp $
# $DragonFly: src/etc/network.subr,v 1.7 2008/03/15 10:13:37 hasso 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. Pseudo arguments DHCP and WPA are handled
# here.
#
ifconfig_up()
{
_cfg=1
ifconfig_args=`ifconfig_getargs $1`
if [ -n "${ifconfig_args}" ]; then
ifconfig $1 ${ifconfig_args}
_cfg=0
fi
if wpaif $1; then
/etc/rc.d/wpa_supplicant start $1
_cfg=0 # XXX: not sure this should count
fi
if dhcpif $1; then
/etc/rc.d/dhclient start $1
_cfg=0
fi
return $_cfg
}
# 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="^"
_cfg=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"
_cfg=0
done
IFS="$oldifs"
if wpaif $1; then
/etc/rc.d/wpa_supplicant stop $1
fi
if dhcpif $1; then
/etc/rc.d/dhclient stop $1
_cfg=0
fi
return $_cfg
}
# _ifconfig_getargs if
# Echos the arguments for the supplied interface to stdout.
# returns 1 if empty. In general, ifconfig_getargs should be used
# outside this file.
_ifconfig_getargs()
{
_ifn=$1
if [ -z "$_ifn" ]; then
return 1
fi
eval _args=\$ifconfig_$1
if [ -z "$_args" -a -n "${pccard_ifconfig}" ]; then
for _if in ${removable_interfaces} ; do
if [ "$_if" = "$_ifn" ] ; then
_args=${pccard_ifconfig}
break
fi
done
fi
echo $_args
}
# ifconfig_getargs if
# Takes the result from _ifconfig_getargs and removes pseudo
# args such as DHCP and WPA.
ifconfig_getargs()
{
_tmpargs=`_ifconfig_getargs $1`
if [ $? -eq 1 ]; then
return 1
fi
_args=
is_optarg=no
for _arg in $_tmpargs; do
if [ "$is_optarg" = "no" ]; then
case $_arg in
[Dd][Hh][Cc][Pp])
;;
[Ww][Pp][Aa])
;;
*)
_args="$_args $_arg"
case $_arg in
authmode)
is_optarg=yes
;;
esac
;;
esac
else
_args="$_args $_arg"
is_optarg=no
fi
done
echo $_args
}
# dhcpif if
# Returns 0 if the interface is a DHCP interface and 1 otherwise.
dhcpif()
{
_tmpargs=`_ifconfig_getargs $1`
for _arg in $_tmpargs; do
case $_arg in
[Dd][Hh][Cc][Pp])
return 0
;;
esac
done
return 1
}
# wpaif if
# Returns 0 if the interface is a WPA interface and 1 otherwise.
wpaif()
{
_tmpargs=`_ifconfig_getargs $1`
is_optarg=no
for _arg in $_tmpargs; do
if [ "$is_optarg" = "no" ]; then
case $_arg in
[Ww][Pp][Aa])
return 0
;;
authmode)
is_optarg=yes
;;
esac
else
is_optarg=no
fi
done
return 1
}
# 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 $_ret
}
# ifnet_rename
# Rename all requested interfaces.
#
ifnet_rename()
{
_ifn_list="`ifconfig -l`"
[ -z "$_ifn_list" ] && return 0
for _if in ${_ifn_list} ; do
eval _ifname=\$ifconfig_${_if}_name
if [ ! -z "$_ifname" ]; then
ifconfig $_if name $_ifname
fi
done
return 0
}
#
# 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 will include cloned interfaces if applicable.
# Cloned interfaces must already exist to have a chance to appear
# in the list if ${network_interfaces} is set to `auto'.
#
list_net_interfaces()
{
type=$1
# Get a list of ALL the interfaces. NOTE: cloned interfaces
# have already been configured so they should show up in the
# ifconfig -l output.
#
case ${network_interfaces} in
[Aa][Uu][Tt][Oo])
_autolist="`ifconfig -l`"
_lo=
for _if in ${_autolist} ; do
if [ "$_if" = "lo0" ]; then
_lo="lo0"
else
_tmplist="${_tmplist} ${_if}"
fi
done
_tmplist="${_lo} ${_tmplist}"
;;
*)
_tmplist="${network_interfaces} ${cloned_interfaces}"
;;
esac
if [ -z "$type" ]; then
echo $_tmplist
return 0
fi
# Separate out dhcp and non-dhcp interfaces
#
_aprefix=
_bprefix=
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
}
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