etc/network.subr

   1 #
   2 # Copyright (c) 2003 The FreeBSD Project. All rights reserved.
   3 #
   4 # Redistribution and use in source and binary forms, with or without
   5 # modification, are permitted provided that the following conditions
   6 # are met:
   7 # 1. Redistributions of source code must retain the above copyright
   8 #    notice, this list of conditions and the following disclaimer.
   9 # 2. Redistributions in binary form must reproduce the above copyright
  10 #    notice, this list of conditions and the following disclaimer in the
  11 #    documentation and/or other materials provided with the distribution.
  12 #
  13 # THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  14 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  16 # ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  17 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  18 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  19 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  20 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  21 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  22 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  23 # SUCH DAMAGE.
  24 #
  25 # $FreeBSD: src/etc/network.subr,v 1.163 2005/06/30 04:52:47 brooks Exp $
  26 #
  27
  28 #
  29 # Subroutines commonly used from network startup scripts.
  30 # Requires that rc.conf be loaded first.
  31 #
  32
  33 # ifconfig_up if
  34 #       Evaluate ifconfig(8) arguments for interface $if and
  35 #       run ifconfig(8) with those arguments. It returns 0 if
  36 #       arguments were found and executed or 1 if the interface
  37 #       had no arguments.  Pseudo arguments DHCP and WPA are handled
  38 #       here.
  39 #
  40 ifconfig_up()
  41 {
  42         _cfg=1
  43
  44         ifconfig_args=`ifconfig_getargs $1`
  45         if [ -n "${ifconfig_args}" ]; then
  46                 ifconfig $1 ${ifconfig_args}
  47                 _cfg=0
  48         fi
  49
  50         if wpaif $1; then
  51                 /etc/rc.d/wpa_supplicant start $1
  52                 _cfg=0          # XXX: not sure this should count
  53         fi
  54
  55         if dhcpif $1; then
  56                 /etc/rc.d/dhclient start $1
  57                 _cfg=0
  58         fi
  59
  60         return $_cfg
  61 }
  62
  63 # ifconfig_down if
  64 #       Remove all inet entries from the $if interface. It returns
  65 #       0 if inet entries were found and removed. It returns 1 if
  66 #       no entries were found or they could not be removed.
  67 #
  68 ifconfig_down()
  69 {
  70         [ -z "$1" ] && return 1
  71         _ifs="^"
  72         _cfg=1
  73
  74         inetList="`ifconfig $1 | grep 'inet ' | tr "\n" "$_ifs"`"
  75
  76         oldifs="$IFS"
  77         IFS="$_ifs"
  78         for _inet in $inetList ; do
  79                 # get rid of extraneous line
  80                 [ -z "$_inet" ] && break
  81
  82                 _inet=`expr "$_inet" : '.*\(inet \([0-9]\{1,3\}\.\)\{3\}[0-9]\{1,3\}\).*'`
  83
  84                 IFS="$oldifs"
  85                 ifconfig $1 ${_inet} delete
  86                 IFS="$_ifs"
  87                 _cfg=0
  88         done
  89         IFS="$oldifs"
  90
  91         if wpaif $1; then
  92                 /etc/rc.d/wpa_supplicant stop $1
  93         fi
  94
  95         if dhcpif $1; then
  96                 /etc/rc.d/dhclient stop $1
  97                 _cfg=0
  98         fi
  99
 100         return $_cfg
 101 }
 102
 103 # get_if_var if var [default]
 104 #       Return the value of the pseudo-hash corresponding to $if where
 105 #       $var is a string containg the sub-string "IF" which will be
 106 #       replaced with $if after the characters defined in _punct are
 107 #       replaced with '_'. If the variable is unset, replace it with
 108 #       $default if given.
 109 get_if_var()
 110 {
 111         local _if _punct_c _punct _var _default prefix suffix
 112
 113         if [ $# -ne 2 -a $# -ne 3 ]; then
 114                 err 3 'USAGE: get_if_var name var [default]'
 115         fi
 116
 117         _if=$1
 118         _punct=". - / +"
 119         for _punct_c in $_punct; do
 120                 _if=`ltr ${_if} ${_punct_c} '_'`
 121         done
 122         _var=$2
 123         _default=$3
 124
 125         prefix=${_var%%IF*}
 126         suffix=${_var##*IF}
 127         eval echo \${${prefix}${_if}${suffix}-${_default}}
 128 }
 129
 130 # _ifconfig_getargs if [af]
 131 #       Echos the arguments for the supplied interface to stdout.
 132 #       returns 1 if empty.  In general, ifconfig_getargs should be used
 133 #       outside this file.
 134 _ifconfig_getargs()
 135 {
 136         local _ifn _af _args
 137         _ifn=$1
 138         _af=${2:+${2}_}
 139
 140         if [ -z "$_ifn" ]; then
 141                 return 1
 142         fi
 143
 144         _args=`get_if_var $_ifn ${_af}ifconfig_IF`
 145         if [ -z "$_args" -a -n "${pccard_ifconfig}" ]; then
 146                 for _if in ${removable_interfaces} ; do
 147                         if [ "$_if" = "$_ifn" ] ; then
 148                                 _args=${pccard_ifconfig}
 149                                 break
 150                         fi
 151                 done
 152         fi
 153
 154         echo $_args
 155 }
 156
 157 # ifconfig_getargs if [af]
 158 #       Takes the result from _ifconfig_getargs and removes pseudo
 159 #       args such as DHCP and WPA.
 160 ifconfig_getargs()
 161 {
 162         local _tmpargs _arg _args
 163         _tmpargs=`_ifconfig_getargs $1 $2`
 164         if [ $? -eq 1 ]; then
 165                 return 1
 166         fi
 167         _args=
 168
 169         is_optarg=no
 170         for _arg in $_tmpargs; do
 171                 if [ "$is_optarg" = "no" ]; then
 172                         case $_arg in
 173                         [Dd][Hh][Cc][Pp])
 174                                 ;;
 175                         [Ww][Pp][Aa])
 176                                 ;;
 177                         *)
 178                                 _args="$_args $_arg"
 179                                 case $_arg in
 180                                 authmode)
 181                                         is_optarg=yes
 182                                         ;;
 183                                 esac
 184                                 ;;
 185                         esac
 186                 else
 187                         _args="$_args $_arg"
 188                         is_optarg=no
 189                 fi
 190         done
 191
 192         echo $_args
 193 }
 194
 195 # ipv6if if
 196 #       Returns 0 if the interface should be configured for IPv6 and
 197 #       1 otherwise.
 198 ipv6if()
 199 {
 200         local _if _tmpargs
 201         _if=$1
 202
 203         # lo0 is always IPv6-enabled
 204         case $_if in
 205         lo0)
 206                 return 0
 207                 ;;
 208         esac
 209
 210         case ${ipv6_enable} in
 211         [Nn][Oo]|[Ff][Aa][Ll][Ss][Ee]|[Oo][Ff][Ff]|0)
 212                 return 1
 213                 ;;
 214         esac
 215
 216         case "${ipv6_network_interfaces}" in
 217         $_if|"$_if "*|*" $_if"|*" $_if "*|[Aa][Uu][Tt][Oo])
 218                 # True if $ipv6_ifconfig_IF is defined.
 219                 _tmpargs=`_ifconfig_getargs $_if ipv6`
 220                 if [ -n "${_tmpargs}" ]; then
 221                         return 0
 222                 fi
 223
 224                 # True if $ipv6_prefix_IF is defined.
 225                 _tmpargs=`get_if_var $_if ipv6_prefix_IF`
 226                 if [ -n "${_tmpargs}" ]; then
 227                         return 0
 228                 fi
 229
 230                 ;;
 231         esac
 232
 233         return 1
 234 }
 235
 236 # dhcpif if
 237 #       Returns 0 if the interface is a DHCP interface and 1 otherwise.
 238 dhcpif()
 239 {
 240         _tmpargs=`_ifconfig_getargs $1`
 241         for _arg in $_tmpargs; do
 242                 case $_arg in
 243                 [Dd][Hh][Cc][Pp])
 244                         return 0
 245                         ;;
 246                 esac
 247         done
 248         return 1
 249 }
 250
 251 # wpaif if
 252 #       Returns 0 if the interface is a WPA interface and 1 otherwise.
 253 wpaif()
 254 {
 255         _tmpargs=`_ifconfig_getargs $1`
 256         is_optarg=no
 257         for _arg in $_tmpargs; do
 258                 if [ "$is_optarg" = "no" ]; then
 259                         case $_arg in
 260                         [Ww][Pp][Aa])
 261                                 return 0
 262                                 ;;
 263                         authmode)
 264                                 is_optarg=yes
 265                                 ;;
 266                         esac
 267                 else
 268                         is_optarg=no
 269                 fi
 270         done
 271         return 1
 272 }
 273
 274 # ifexists if
 275 #       Returns 0 if the interface exists and 1 otherwise.
 276 ifexists()
 277 {
 278         [ -z "$1" ] && return 1
 279         ifconfig $1 > /dev/null 2>&1
 280 }
 281
 282 # ifalias_up if
 283 #       Configure aliases for network interface $if.
 284 #       It returns 0 if at least one alias was configured or
 285 #       1 if there were none.
 286 #
 287 ifalias_up()
 288 {
 289         _ret=1
 290         alias=0
 291         while : ; do
 292                 ifconfig_args=`get_if_var $1 ifconfig_IF_alias${alias}`
 293                 if [ -n "${ifconfig_args}" ]; then
 294                         ifconfig $1 ${ifconfig_args} alias
 295                         alias=$((${alias} + 1))
 296                         _ret=0
 297                 else
 298                         break
 299                 fi
 300         done
 301         return $_ret
 302 }
 303
 304 #ifalias_down if
 305 #       Remove aliases for network interface $if.
 306 #       It returns 0 if at least one alias was removed or
 307 #       1 if there were none.
 308 #
 309 ifalias_down()
 310 {
 311         _ret=1
 312         alias=0
 313         while : ; do
 314                 ifconfig_args=`get_if_var $1 ifconfig_IF_alias${alias}`
 315                 if [ -n "${ifconfig_args}" ]; then
 316                         ifconfig $1 ${ifconfig_args} -alias
 317                         alias=$((${alias} + 1))
 318                         _ret=0
 319                 else
 320                         break
 321                 fi
 322         done
 323         return $_ret
 324 }
 325
 326 # ifscript_up if
 327 #       Evaluate a startup script for the $if interface.
 328 #       It returns 0 if a script was found and processed or
 329 #       1 if no script was found.
 330 #
 331 ifscript_up()
 332 {
 333         if [ -r /etc/start_if.$1 ]; then
 334                 . /etc/start_if.$1
 335                 return 0
 336         fi
 337         return 1
 338 }
 339
 340 # ifscript_down if
 341 #       Evaluate a shutdown script for the $if interface.
 342 #       It returns 0 if a script was found and processed or
 343 #       1 if no script was found.
 344 #
 345 ifscript_down()
 346 {
 347         if [ -r /etc/stop_if.$1 ]; then
 348                 . /etc/stop_if.$1
 349                 return 0
 350         fi
 351         return 1
 352 }
 353
 354 # Create cloneable interfaces.
 355 #
 356 clone_up()
 357 {
 358         _prefix=
 359         _list=
 360         for ifn in ${cloned_interfaces}; do
 361                 ifconfig ${ifn} create
 362                 if [ $? -eq 0 ]; then
 363                         _list="${_list}${_prefix}${ifn}"
 364                         [ -z "$_prefix" ] && _prefix=' '
 365                 fi
 366         done
 367         debug "Cloned: ${_list}"
 368 }
 369
 370 # Destroy cloned interfaces. Destroyed interfaces are echoed
 371 # to standard output.
 372 #
 373 clone_down()
 374 {
 375         _prefix=
 376         _list=
 377         for ifn in ${cloned_interfaces}; do
 378                 ifconfig ${ifn} destroy
 379                 if [ $? -eq 0 ]; then
 380                         _list="${_list}${_prefix}${ifn}"
 381                         [ -z "$_prefix" ] && _prefix=' '
 382                 fi
 383         done
 384         debug "Destroyed clones: ${_list}"
 385 }
 386
 387 gif_up() {
 388         case ${gif_interfaces} in
 389         [Nn][Oo] | '')
 390                 ;;
 391         *)
 392                 for i in ${gif_interfaces}; do
 393                         eval peers=\$gifconfig_$i
 394                         case ${peers} in
 395                         '')
 396                                 continue
 397                                 ;;
 398                         *)
 399                                 ifconfig $i create >/dev/null 2>&1
 400                                 ifconfig $i tunnel ${peers}
 401                                 ifconfig $i up
 402                                 ;;
 403                         esac
 404                 done
 405                 ;;
 406         esac
 407 }
 408
 409 # ifnet_rename
 410 #       Rename all requested interfaces.
 411 #
 412 ifnet_rename()
 413 {
 414
 415         _ifn_list="`ifconfig -l`"
 416         [ -z "$_ifn_list" ] && return 0
 417         for _if in ${_ifn_list} ; do
 418                 _ifname=`get_if_var $_if ifconfig_IF_name`
 419                 if [ ! -z "$_ifname" ]; then
 420                         ifconfig $_if name $_ifname
 421                 fi
 422         done
 423         return 0
 424 }
 425
 426 #
 427 # list_net_interfaces type
 428 #       List all network interfaces. The type of interface returned
 429 #       can be controlled by the type argument. The type
 430 #       argument can be any of the following:
 431 #               nodhcp - all interfaces, excluding DHCP configured interfaces
 432 #               dhcp   - list only DHCP configured interfaces
 433 #       If no argument is specified all network interfaces are output.
 434 #       Note that the list will include cloned interfaces if applicable.
 435 #       Cloned interfaces must already exist to have a chance to appear
 436 #       in the list if ${network_interfaces} is set to `auto'.
 437 #
 438 list_net_interfaces()
 439 {
 440         type=$1
 441
 442         # Get a list of ALL the interfaces.  NOTE: cloned interfaces
 443         # have already been configured so they should show up in the
 444         # ifconfig -l output.
 445         #
 446         case ${network_interfaces} in
 447         [Aa][Uu][Tt][Oo])
 448                 _autolist="`ifconfig -l` `sysctl -in net.wlan.devices`"
 449                 _lo=
 450                 for _if in ${_autolist} ; do
 451                         if [ "$_if" = "lo0" ]; then
 452                                 _lo="lo0"
 453                         else
 454                                 _tmplist="${_tmplist} ${_if}"
 455                         fi
 456                 done
 457                 _tmplist="${_lo} ${_tmplist}"
 458                 ;;
 459         *)
 460                 _tmplist="${network_interfaces} ${cloned_interfaces}"
 461                 ;;
 462         esac
 463
 464         if [ -z "$type" ]; then
 465                 echo $_tmplist
 466                 return 0
 467         fi
 468
 469         # Separate out dhcp and non-dhcp interfaces
 470         #
 471         _aprefix=
 472         _bprefix=
 473         for _if in ${_tmplist} ; do
 474                 eval _ifarg="\$ifconfig_${_if}"
 475                 case "$_ifarg" in
 476                 [Dd][Hh][Cc][Pp])
 477                         _dhcplist="${_dhcplist}${_aprefix}${_if}"
 478                         [ -z "$_aprefix" ] && _aprefix=' '
 479                         ;;
 480                 ''|*)
 481                         _nodhcplist="${_nodhcplist}${_bprefix}${_if}"
 482                         [ -z "$_bprefix" ] && _bprefix=' '
 483                         ;;
 484                 esac
 485         done
 486
 487         case "$type" in
 488         nodhcp)
 489                 echo $_nodhcplist
 490                 ;;
 491         dhcp)
 492                 echo $_dhcplist
 493                 ;;
 494         esac
 495         return 0
 496 }
 497
 498 hexdigit()
 499 {
 500         if [ $1 -lt 10 ]; then
 501                 echo $1
 502         else
 503                 case $1 in
 504                 10)     echo a ;;
 505                 11)     echo b ;;
 506                 12)     echo c ;;
 507                 13)     echo d ;;
 508                 14)     echo e ;;
 509                 15)     echo f ;;
 510                 esac
 511         fi
 512 }
 513
 514 hexprint()
 515 {
 516         val=$1
 517         str=''
 518
 519         dig=`hexdigit $((${val} & 15))`
 520         str=${dig}${str}
 521         val=$((${val} >> 4))
 522         while [ ${val} -gt 0 ]; do
 523                 dig=`hexdigit $((${val} & 15))`
 524                 str=${dig}${str}
 525                 val=$((${val} >> 4))
 526         done
 527
 528         echo ${str}
 529 }
 530
 531 # Setup the interfaces for IPv6
 532 network6_interface_setup()
 533 {
 534         interfaces=$*
 535         rtsol_interfaces=''
 536         case ${ipv6_gateway_enable} in
 537         [Yy][Ee][Ss])
 538                 rtsol_available=no
 539                 ;;
 540         *)
 541                 rtsol_available=yes
 542                 ;;
 543         esac
 544         for i in $interfaces; do
 545                 rtsol_interface=yes
 546                 prefix=`get_if_var $i ipv6_prefix_IF`
 547                 if [ -n "${prefix}" ]; then
 548                         rtsol_available=no
 549                         rtsol_interface=no
 550                         laddr=`network6_getladdr $i`
 551                         hostid=`expr "${laddr}" : 'fe80::\(.*\)%\(.*\)'`
 552                         for j in ${prefix}; do
 553                                 address=$j\:${hostid}
 554                                 ifconfig $i inet6 ${address} prefixlen 64 alias
 555
 556                                 case ${ipv6_gateway_enable} in
 557                                 [Yy][Ee][Ss])
 558                                         # subnet-router anycast address
 559                                         # (rfc2373)
 560                                         ifconfig $i inet6 $j:: prefixlen 64 \
 561                                                 alias anycast
 562                                         ;;
 563                                 esac
 564                         done
 565                 fi
 566                 ipv6_ifconfig=`get_if_var $i ipv6_ifconfig_IF`
 567                 if [ -n "${ipv6_ifconfig}" ]; then
 568                         rtsol_available=no
 569                         rtsol_interface=no
 570                         ifconfig $i inet6 ${ipv6_ifconfig} alias
 571                 fi
 572
 573                 if [ ${rtsol_available} = yes -a ${rtsol_interface} = yes ]
 574                 then
 575                         case ${i} in
 576                         lo0|gif[0-9]*|stf[0-9]*|lp[0-9]*|sl[0-9]*|tun[0-9]*)
 577                                 ;;
 578                         *)
 579                                 rtsol_interfaces="${rtsol_interfaces} ${i}"
 580                                 ;;
 581                         esac
 582                 else
 583                         ifconfig $i inet6
 584                 fi
 585         done
 586
 587         if [ ${rtsol_available} = yes -a -n "${rtsol_interfaces}" ]; then
 588                 # Act as endhost - automatically configured.
 589                 # You can configure only single interface, as
 590                 # specification assumes that autoconfigured host has
 591                 # single interface only.
 592                 sysctl net.inet6.ip6.accept_rtadv=1
 593                 set ${rtsol_interfaces}
 594                 ifconfig $1 up
 595                 rtsol $1
 596         fi
 597
 598         for i in $interfaces; do
 599                 alias=0
 600                 while : ; do
 601                         ipv6_ifconfig=`get_if_var $i ipv6_ifconfig_IF_alias${alias}`
 602                         if [ -z "${ipv6_ifconfig}" ]; then
 603                                 break;
 604                         fi
 605                         ifconfig $i inet6 ${ipv6_ifconfig} alias
 606                         alias=$((${alias} + 1))
 607                 done
 608         done
 609 }
 610
 611 # Setup IPv6 to IPv4 mapping
 612 network6_stf_setup()
 613 {
 614         case ${stf_interface_ipv4addr} in
 615         [Nn][Oo] | '')
 616                 ;;
 617         *)
 618                 # assign IPv6 addr and interface route for 6to4 interface
 619                 stf_prefixlen=$((16+${stf_interface_ipv4plen:-0}))
 620                 OIFS="$IFS"
 621                 IFS=".$IFS"
 622                 set ${stf_interface_ipv4addr}
 623                 IFS="$OIFS"
 624                 hexfrag1=`hexprint $(($1*256 + $2))`
 625                 hexfrag2=`hexprint $(($3*256 + $4))`
 626                 ipv4_in_hexformat="${hexfrag1}:${hexfrag2}"
 627                 case ${stf_interface_ipv6_ifid} in
 628                 [Aa][Uu][Tt][Oo] | '')
 629                         for i in ${ipv6_network_interfaces}; do
 630                                 laddr=`network6_getladdr ${i}`
 631                                 case ${laddr} in
 632                                 '')
 633                                         ;;
 634                                 *)
 635                                         break
 636                                         ;;
 637                                 esac
 638                         done
 639                         stf_interface_ipv6_ifid=`expr "${laddr}" : \
 640                                                       'fe80::\(.*\)%\(.*\)'`
 641                         case ${stf_interface_ipv6_ifid} in
 642                         '')
 643                                 stf_interface_ipv6_ifid=0:0:0:1
 644                                 ;;
 645                         esac
 646                         ;;
 647                 esac
 648                 ifconfig stf0 create >/dev/null 2>&1
 649                 ifconfig stf0 inet6 2002:${ipv4_in_hexformat}:${stf_interface_ipv6_slaid:-0}:${stf_interface_ipv6_ifid} \
 650                         prefixlen ${stf_prefixlen}
 651                 # disallow packets to malicious 6to4 prefix
 652                 route add -inet6 2002:e000:: -prefixlen 20 ::1 -reject
 653                 route add -inet6 2002:7f00:: -prefixlen 24 ::1 -reject
 654                 route add -inet6 2002:0000:: -prefixlen 24 ::1 -reject
 655                 route add -inet6 2002:ff00:: -prefixlen 24 ::1 -reject
 656                 ;;
 657         esac
 658 }
 659
 660 # Setup static routes
 661 network6_static_routes_setup()
 662 {
 663         # Set up any static routes.
 664         case ${ipv6_defaultrouter} in
 665         [Nn][Oo] | '')
 666                 ;;
 667         *)
 668                 ipv6_static_routes="default ${ipv6_static_routes}"
 669                 ipv6_route_default="default ${ipv6_defaultrouter}"
 670                 ;;
 671         esac
 672         case ${ipv6_static_routes} in
 673         [Nn][Oo] | '')
 674                 ;;
 675         *)
 676                 for i in ${ipv6_static_routes}; do
 677                         eval ipv6_route_args=\$ipv6_route_${i}
 678                         route add -inet6 ${ipv6_route_args}
 679                 done
 680                 ;;
 681         esac
 682 }
 683
 684 # Install the "default interface" to kernel, which will be used
 685 # as the default route when there's no router.
 686 network6_default_interface_setup()
 687 {
 688         # Choose IPv6 default interface if it is not clearly specified.
 689         case ${ipv6_default_interface} in
 690         '')
 691                 for i in ${ipv6_network_interfaces}; do
 692                         case $i in
 693                         lo0)
 694                                 continue
 695                                 ;;
 696                         esac
 697                         laddr=`network6_getladdr $i exclude_tentative`
 698                         case ${laddr} in
 699                         '')
 700                                 ;;
 701                         *)
 702                                 ipv6_default_interface=$i
 703                                 break
 704                                 ;;
 705                         esac
 706                 done
 707                 ;;
 708         esac
 709
 710         # Disallow unicast packets without outgoing scope identifiers,
 711         # or route such packets to a "default" interface, if it is specified.
 712         route add -inet6 fe80:: -prefixlen 10 ::1 -reject
 713         case ${ipv6_default_interface} in
 714         [Nn][Oo] | '')
 715                 route add -inet6 ff02:: -prefixlen 16 ::1 -reject
 716                 ;;
 717         *)
 718                 laddr=`network6_getladdr ${ipv6_default_interface}`
 719                 route add -inet6 ff02:: ${laddr} -prefixlen 16 -interface \
 720                         -cloning
 721
 722                 # Disable installing the default interface with the
 723                 # case net.inet6.ip6.forwarding=0 and
 724                 # net.inet6.ip6.accept_rtadv=0, due to avoid conflict
 725                 # between the default router list and the manual
 726                 # configured default route.
 727                 case ${ipv6_gateway_enable} in
 728                 [Yy][Ee][Ss])
 729                         ;;
 730                 *)
 731                         if [ `sysctl -n net.inet6.ip6.accept_rtadv` -eq 1 ]
 732                         then
 733                                 ndp -I ${ipv6_default_interface}
 734                         fi
 735                         ;;
 736                 esac
 737                 ;;
 738         esac
 739 }
 740
 741 network6_getladdr()
 742 {
 743         ifconfig $1 2>/dev/null | while read proto addr rest; do
 744                 case ${proto} in
 745                 inet6)
 746                         case ${addr} in
 747                         fe80::*)
 748                                 if [ -z "$2" ]; then
 749                                         echo ${addr}
 750                                         return
 751                                 fi
 752                                 case ${rest} in
 753                                 *tentative*)
 754                                         continue
 755                                         ;;
 756                                 *)
 757                                         echo ${addr}
 758                                         return
 759                                 esac
 760                         esac
 761                 esac
 762         done
 763 }