freebsd-dev/etc/network.subr
Andrew Thompson ddf1c6facd Do not attempt to load the kernel module when checking if an interface exists.
This would cause pseudo network modules to be reloaded again when trying to
unload the first time if any cloned interfaces exist.

MFC after:	2 weeks
2007-05-23 00:18:44 +00:00

973 lines
19 KiB
Plaintext

#
# 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.
#
# $FreeBSD$
#
#
# 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 up
ifconfig $1 ${ifconfig_args}
_cfg=0
fi
if wpaif $1; then
if [ $_cfg -ne 0 ] ; then
ifconfig $1 up
fi
/etc/rc.d/wpa_supplicant start $1
_cfg=0 # XXX: not sure this should count
fi
if dhcpif $1; then
if [ $_cfg -ne 0 ] ; then
ifconfig $1 up
fi
if syncdhcpif $1; then
/etc/rc.d/dhclient start $1
fi
_cfg=0
fi
return $_cfg
}
# ifconfig_down if
# returns 1 if wpa_supplicant or dhclient was stopped or
# the interface exists.
#
ifconfig_down()
{
[ -z "$1" ] && return 1
_cfg=1
if wpaif $1; then
/etc/rc.d/wpa_supplicant stop $1
_cfg=0
fi
if dhcpif $1; then
/etc/rc.d/dhclient stop $1
_cfg=0
fi
if ifexists $1; then
ifconfig $1 down
_cfg=0
fi
return $_cfg
}
# get_if_var if var [default]
# Return the value of the pseudo-hash corresponding to $if where
# $var is a string containg the sub-string "IF" which will be
# replaced with $if after the characters defined in _punct are
# replaced with '_'. If the variable is unset, replace it with
# $default if given.
get_if_var()
{
if [ $# -ne 2 -a $# -ne 3 ]; then
err 3 'USAGE: get_if_var name var [default]'
fi
_if=$1
_punct=". - / +"
for _punct_c in $_punct; do
_if=`ltr ${_if} ${_punct_c} '_'`
done
_var=$2
_default=$3
prefix=${_var%%IF*}
suffix=${_var##*IF}
eval echo \${${prefix}${_if}${suffix}-${_default}}
}
# _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
get_if_var $_ifn ifconfig_IF "$ifconfig_DEFAULT"
}
# 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=
for _arg in $_tmpargs; do
case $_arg in
[Dd][Hh][Cc][Pp]) ;;
[Nn][Oo][Aa][Uu][Tt][Oo]) ;;
[Nn][Oo][Ss][Yy][Nn][Cc][Dd][Hh][Cc][Pp]) ;;
[Ss][Yy][Nn][Cc][Dd][Hh][Cc][Pp]) ;;
[Ww][Pp][Aa]) ;;
*)
_args="$_args $_arg"
;;
esac
done
echo $_args
}
# autoif
# Returns 0 if the interface should be automaticly configured at
# boot time and 1 otherwise.
autoif()
{
_tmpargs=`_ifconfig_getargs $1`
for _arg in $_tmpargs; do
case $_arg in
[Nn][Oo][Aa][Uu][Tt][Oo])
return 1
;;
esac
done
return 0
}
# 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
;;
[Nn][Oo][Ss][Yy][Nn][Cc][Dd][Hh][Cc][Pp])
return 0
;;
[Ss][Yy][Nn][Cc][Dd][Hh][Cc][Pp])
return 0
;;
esac
done
return 1
}
# syncdhcpif
# Returns 0 if the interface should be configured synchronously and
# 1 otherwise.
syncdhcpif()
{
_tmpargs=`_ifconfig_getargs $1`
for _arg in $_tmpargs; do
case $_arg in
[Nn][Oo][Ss][Yy][Nn][Cc][Dd][Hh][Cc][Pp])
return 1
;;
[Ss][Yy][Nn][Cc][Dd][Hh][Cc][Pp])
return 0
;;
esac
done
if checkyesno synchronous_dhclient; then
return 0
else
return 1
fi
}
# wpaif if
# Returns 0 if the interface is a WPA interface and 1 otherwise.
wpaif()
{
_tmpargs=`_ifconfig_getargs $1`
for _arg in $_tmpargs; do
case $_arg in
[Ww][Pp][Aa])
return 0
;;
esac
done
return 1
}
# ipv6if if
# Returns 0 if the interface should be configured for IPv6 and
# 1 otherwise.
ipv6if()
{
if ! checkyesno ipv6_enable; then
return 1
fi
case "${ipv6_network_interfaces}" in
[Aa][Uu][Tt][Oo])
return 0
;;
''|[Nn][Oo][Nn][Ee])
return 1
;;
esac
for v6if in ${ipv6_network_interfaces}; do
if [ "${v6if}" = "${1}" ]; then
return 0
fi
done
return 1
}
# ifexists if
# Returns 0 if the interface exists and 1 otherwise.
ifexists()
{
ifconfig -n $1 > /dev/null 2>&1
}
# ipv4_up if
# add IPv4 addresses to the interface $if
ipv4_up()
{
_if=$1
ifalias_up ${_if}
ipv4_addrs_common ${_if} alias
}
# ipv4_down if
# remove IPv4 addresses from the interface $if
ipv4_down()
{
_if=$1
_ifs="^"
_ret=1
ifexists ${_if} || return 1
inetList="`ifconfig ${_if} | grep 'inet ' | tr "\n" "$_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 ${_if} ${_inet} delete
IFS="$_ifs"
_ret=0
done
IFS="$oldifs"
ifalias_down ${_if} && _ret=0
ipv4_addrs_common ${_if} -alias && _ret=0
return $_ret
}
# ipv4_addrs_common if action
# Evaluate the ifconfig_if_ipv4 arguments for interface $if
# and use $action to add or remove IPv4 addresses from $if.
ipv4_addrs_common()
{
_ret=1
_if=$1
_action=$2
# get ipv4-addresses
cidr_addr=`get_if_var $_if ipv4_addrs_IF`
for _cidr in ${cidr_addr}; do
_ipaddr=${_cidr%%/*}
_netmask="/"${_cidr##*/}
_range=${_ipaddr##*.}
_ipnet=${_ipaddr%.*}
_iplow=${_range%-*}
_iphigh=${_range#*-}
# clear netmask when removing aliases
if [ "${_action}" = "-alias" ]; then
_netmask=""
fi
_ipcount=${_iplow}
while [ "${_ipcount}" -le "${_iphigh}" ]; do
eval "ifconfig ${_if} ${_action} ${_ipnet}.${_ipcount}${_netmask}"
_ipcount=$((${_ipcount}+1))
_ret=0
# only the first ipaddr in a subnet need the real netmask
if [ "${_action}" != "-alias" ]; then
_netmask="/32"
fi
done
done
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
ifconfig_args=`get_if_var $1 ifconfig_IF_alias${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
ifconfig_args=`get_if_var $1 ifconfig_IF_alias${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}"
}
# Create netgraph nodes.
#
ng_mkpeer() {
ngctl -f - 2> /dev/null <<EOF
mkpeer $*
msg dummy nodeinfo
EOF
}
ng_create_one() {
ng_mkpeer $* | while read line; do
t=`expr "${line}" : '.* name="\([a-z]*[0-9]*\)" .*'`
if [ -n "${t}" ]; then
echo ${t}
return
fi
done
}
gif_up() {
# The following must be removed once RELENG_7 is branched.
case ${gif_interfaces} in
[Nn][Oo])
warn "gif_interfaces=\"NO\" is deprecated, use gif_interfaces=\"\" instead."
gif_interfaces=""
;;
esac
for i in ${gif_interfaces}; do
peers=`get_if_var $i gifconfig_IF`
case ${peers} in
'')
continue
;;
*)
ifconfig $i create >/dev/null 2>&1
ifconfig $i tunnel ${peers}
ifconfig $i up
;;
esac
done
}
# ng_fec_create ifn
# Configure Fast EtherChannel for interface $ifn. Returns 0 if FEC
# arguments were found and configured; returns !0 otherwise.
ng_fec_create() {
local req_iface iface bogus
req_iface="$1"
ngctl shutdown ${req_iface}: > /dev/null 2>&1
bogus=""
while true; do
iface=`ng_create_one fec dummy fec`
if [ -z "${iface}" ]; then
exit 2
fi
if [ "${iface}" = "${req_iface}" ]; then
break
fi
bogus="${bogus} ${iface}"
done
for iface in ${bogus}; do
ngctl shutdown ${iface}:
done
}
fec_up() {
for i in ${fec_interfaces}; do
ng_fec_create $i
for j in `get_if_var $i fecconfig_IF`; do
case ${j} in
'')
continue
;;
*)
ngctl msg ${i}: add_iface "\"${j}\""
;;
esac
done
done
}
#
# 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"
ifconfig_args=`get_if_var $ifn ifconfig_IF_ipx`
if [ -n "${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
ifexists $1 || return 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
_ifname=`get_if_var $_if ifconfig_IF_name`
if [ ! -z "$_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 and make lo0 first if it's there.
#
case ${network_interfaces} in
[Aa][Uu][Tt][Oo])
_prefix=''
_autolist="`ifconfig -l`"
_lo=
for _if in ${_autolist} ; do
if autoif $_if; then
if [ "$_if" = "lo0" ]; then
_lo="lo0 "
else
_tmplist="${_tmplist}${_prefix}${_if}"
[ -z "$_prefix" ] && _prefix=' '
fi
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
if dhcpif $_if; then
_dhcplist="${_dhcplist}${_aprefix}${_if}"
[ -z "$_aprefix" ] && _aprefix=' '
elif [ -n "`_ifconfig_getargs $_if`" ]; then
_nodhcplist="${_nodhcplist}${_bprefix}${_if}"
[ -z "$_bprefix" ] && _bprefix=' '
fi
done
case "$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
prefix=`get_if_var $i ipv6_prefix_IF`
if [ -n "${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
ipv6_ifconfig=`get_if_var $i ipv6_ifconfig_IF`
if [ -n "${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 ${i} in
lo0|gif[0-9]*|stf[0-9]*|faith[0-9]*|lp[0-9]*|sl[0-9]*|tun[0-9]*|pflog[0-9]*|pfsync[0-9]*)
;;
*)
rtsol_interfaces="${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 ${rtsol_flags} $1
fi
for i in $interfaces; do
alias=0
while : ; do
ipv6_ifconfig=`get_if_var $i ipv6_ifconfig_IF_alias${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
ipv6_route_args=`get_if_var $i ipv6_route_IF`
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
}