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/dhcp_client 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/dhcp_client 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 [ipv4|ipv6]
 237 #       Returns 0 if the interface needs DHCP for IPv4/IPv6 and 1 otherwise.
 238 #       If the second argument is "ipv4" (or "ipv6"), then only IPv4 (or
 239 #       IPv6) is checked, otherwise both are checked.
 240 dhcpif()
 241 {
 242         local _tmpargs _arg _if _af
 243         _if=$1
 244         _af=$2
 245
 246         if [ -z "$_af" -o "$_af" = "ipv4" ]; then
 247                 _tmpargs=`_ifconfig_getargs $_if`
 248                 for _arg in $_tmpargs; do
 249                         case $_arg in
 250                         [Dd][Hh][Cc][Pp])
 251                                 return 0
 252                                 ;;
 253                         esac
 254                 done
 255         fi
 256
 257         if [ -z "$_af" -o "$_af" = "ipv6" ] && ipv6if $_if; then
 258                 _tmpargs=`_ifconfig_getargs $_if ipv6`
 259                 for _arg in $_tmpargs; do
 260                         case $_arg in
 261                         [Dd][Hh][Cc][Pp])
 262                                 return 0
 263                                 ;;
 264                         esac
 265                 done
 266         fi
 267
 268         return 1
 269 }
 270
 271 # wpaif if
 272 #       Returns 0 if the interface is a WPA interface and 1 otherwise.
 273 wpaif()
 274 {
 275         local _tmpargs _arg
 276         _tmpargs=`_ifconfig_getargs $1`
 277         is_optarg=no
 278         for _arg in $_tmpargs; do
 279                 if [ "$is_optarg" = "no" ]; then
 280                         case $_arg in
 281                         [Ww][Pp][Aa])
 282                                 return 0
 283                                 ;;
 284                         authmode)
 285                                 is_optarg=yes
 286                                 ;;
 287                         esac
 288                 else
 289                         is_optarg=no
 290                 fi
 291         done
 292         return 1
 293 }
 294
 295 # ifexists if
 296 #       Returns 0 if the interface exists and 1 otherwise.
 297 ifexists()
 298 {
 299         [ -z "$1" ] && return 1
 300         ifconfig $1 > /dev/null 2>&1
 301 }
 302
 303 # ifalias_up if
 304 #       Configure aliases for network interface $if.
 305 #       It returns 0 if at least one alias was configured or
 306 #       1 if there were none.
 307 #
 308 ifalias_up()
 309 {
 310         _ret=1
 311         alias=0
 312         while : ; do
 313                 ifconfig_args=`get_if_var $1 ifconfig_IF_alias${alias}`
 314                 if [ -n "${ifconfig_args}" ]; then
 315                         ifconfig $1 ${ifconfig_args} alias
 316                         alias=$((${alias} + 1))
 317                         _ret=0
 318                 else
 319                         break
 320                 fi
 321         done
 322         return $_ret
 323 }
 324
 325 #ifalias_down if
 326 #       Remove aliases for network interface $if.
 327 #       It returns 0 if at least one alias was removed or
 328 #       1 if there were none.
 329 #
 330 ifalias_down()
 331 {
 332         _ret=1
 333         alias=0
 334         while : ; do
 335                 ifconfig_args=`get_if_var $1 ifconfig_IF_alias${alias}`
 336                 if [ -n "${ifconfig_args}" ]; then
 337                         ifconfig $1 ${ifconfig_args} -alias
 338                         alias=$((${alias} + 1))
 339                         _ret=0
 340                 else
 341                         break
 342                 fi
 343         done
 344         return $_ret
 345 }
 346
 347 # ifscript_up if
 348 #       Evaluate a startup script for the $if interface.
 349 #       It returns 0 if a script was found and processed or
 350 #       1 if no script was found.
 351 #
 352 ifscript_up()
 353 {
 354         if [ -r /etc/start_if.$1 ]; then
 355                 . /etc/start_if.$1
 356                 return 0
 357         fi
 358         return 1
 359 }
 360
 361 # ifscript_down if
 362 #       Evaluate a shutdown script for the $if interface.
 363 #       It returns 0 if a script was found and processed or
 364 #       1 if no script was found.
 365 #
 366 ifscript_down()
 367 {
 368         if [ -r /etc/stop_if.$1 ]; then
 369                 . /etc/stop_if.$1
 370                 return 0
 371         fi
 372         return 1
 373 }
 374
 375 # Create cloneable interfaces.
 376 #
 377 clone_up()
 378 {
 379         _prefix=
 380         _list=
 381         for ifn in ${cloned_interfaces}; do
 382                 ifconfig ${ifn} create
 383                 if [ $? -eq 0 ]; then
 384                         _list="${_list}${_prefix}${ifn}"
 385                         [ -z "$_prefix" ] && _prefix=' '
 386                 fi
 387         done
 388         debug "Cloned: ${_list}"
 389 }
 390
 391 # Destroy cloned interfaces. Destroyed interfaces are echoed
 392 # to standard output.
 393 #
 394 clone_down()
 395 {
 396         _prefix=
 397         _list=
 398         for ifn in ${cloned_interfaces}; do
 399                 ifconfig ${ifn} destroy
 400                 if [ $? -eq 0 ]; then
 401                         _list="${_list}${_prefix}${ifn}"
 402                         [ -z "$_prefix" ] && _prefix=' '
 403                 fi
 404         done
 405         debug "Destroyed clones: ${_list}"
 406 }
 407
 408 gif_up() {
 409         case ${gif_interfaces} in
 410         [Nn][Oo] | '')
 411                 ;;
 412         *)
 413                 for i in ${gif_interfaces}; do
 414                         eval peers=\$gifconfig_$i
 415                         case ${peers} in
 416                         '')
 417                                 continue
 418                                 ;;
 419                         *)
 420                                 ifconfig $i create >/dev/null 2>&1
 421                                 ifconfig $i tunnel ${peers}
 422                                 ifconfig $i up
 423                                 ;;
 424                         esac
 425                 done
 426                 ;;
 427         esac
 428 }
 429
 430 # ifnet_rename
 431 #       Rename all requested interfaces.
 432 #
 433 ifnet_rename()
 434 {
 435
 436         _ifn_list="`ifconfig -l`"
 437         [ -z "$_ifn_list" ] && return 0
 438         for _if in ${_ifn_list} ; do
 439                 _ifname=`get_if_var $_if ifconfig_IF_name`
 440                 if [ ! -z "$_ifname" ]; then
 441                         ifconfig $_if name $_ifname
 442                 fi
 443         done
 444         return 0
 445 }
 446
 447 #
 448 # list_net_interfaces type
 449 #       List all network interfaces. The type of interface returned
 450 #       can be controlled by the type argument. The type
 451 #       argument can be any of the following:
 452 #               nodhcp - all interfaces, excluding DHCP configured interfaces
 453 #               dhcp   - list only DHCP configured interfaces
 454 #       If no argument is specified all network interfaces are output.
 455 #       Note that the list will include cloned interfaces if applicable.
 456 #       Cloned interfaces must already exist to have a chance to appear
 457 #       in the list if ${network_interfaces} is set to `auto'.
 458 #
 459 list_net_interfaces()
 460 {
 461         type=$1
 462
 463         # Get a list of ALL the interfaces.  NOTE: cloned interfaces
 464         # have already been configured so they should show up in the
 465         # ifconfig -l output.
 466         #
 467         case ${network_interfaces} in
 468         [Aa][Uu][Tt][Oo])
 469                 _autolist="`ifconfig -l` `sysctl -in net.wlan.devices`"
 470                 _lo=
 471                 for _if in ${_autolist} ; do
 472                         if [ "$_if" = "lo0" ]; then
 473                                 _lo="lo0"
 474                         else
 475                                 _tmplist="${_tmplist} ${_if}"
 476                         fi
 477                 done
 478                 _tmplist="${_lo} ${_tmplist}"
 479                 ;;
 480         *)
 481                 _tmplist="${network_interfaces} ${cloned_interfaces}"
 482                 ;;
 483         esac
 484
 485         if [ -z "$type" ]; then
 486                 echo $_tmplist
 487                 return 0
 488         fi
 489
 490         # Separate out dhcp and non-dhcp interfaces
 491         #
 492         _aprefix=
 493         _bprefix=
 494         for _if in ${_tmplist} ; do
 495                 eval _ifarg="\$ifconfig_${_if}"
 496                 case "$_ifarg" in
 497                 [Dd][Hh][Cc][Pp])
 498                         _dhcplist="${_dhcplist}${_aprefix}${_if}"
 499                         [ -z "$_aprefix" ] && _aprefix=' '
 500                         ;;
 501                 ''|*)
 502                         _nodhcplist="${_nodhcplist}${_bprefix}${_if}"
 503                         [ -z "$_bprefix" ] && _bprefix=' '
 504                         ;;
 505                 esac
 506         done
 507
 508         case "$type" in
 509         nodhcp)
 510                 echo $_nodhcplist
 511                 ;;
 512         dhcp)
 513                 echo $_dhcplist
 514                 ;;
 515         esac
 516         return 0
 517 }
 518
 519 hexdigit()
 520 {
 521         if [ $1 -lt 10 ]; then
 522                 echo $1
 523         else
 524                 case $1 in
 525                 10)     echo a ;;
 526                 11)     echo b ;;
 527                 12)     echo c ;;
 528                 13)     echo d ;;
 529                 14)     echo e ;;
 530                 15)     echo f ;;
 531                 esac
 532         fi
 533 }
 534
 535 hexprint()
 536 {
 537         val=$1
 538         str=''
 539
 540         dig=`hexdigit $((${val} & 15))`
 541         str=${dig}${str}
 542         val=$((${val} >> 4))
 543         while [ ${val} -gt 0 ]; do
 544                 dig=`hexdigit $((${val} & 15))`
 545                 str=${dig}${str}
 546                 val=$((${val} >> 4))
 547         done
 548
 549         echo ${str}
 550 }
 551
 552 # Setup the interfaces for IPv6
 553 network6_interface_setup()
 554 {
 555         interfaces=$*
 556         rtsol_interfaces=''
 557         case ${ipv6_gateway_enable} in
 558         [Yy][Ee][Ss])
 559                 rtsol_available=no
 560                 ;;
 561         *)
 562                 rtsol_available=yes
 563                 ;;
 564         esac
 565         for i in $interfaces; do
 566                 rtsol_interface=yes
 567                 prefix=`get_if_var $i ipv6_prefix_IF`
 568                 if [ -n "${prefix}" ]; then
 569                         rtsol_available=no
 570                         rtsol_interface=no
 571                         laddr=`network6_getladdr $i`
 572                         hostid=`expr "${laddr}" : 'fe80::\(.*\)%\(.*\)'`
 573                         for j in ${prefix}; do
 574                                 address=$j\:${hostid}
 575                                 ifconfig $i inet6 ${address} prefixlen 64 alias
 576
 577                                 case ${ipv6_gateway_enable} in
 578                                 [Yy][Ee][Ss])
 579                                         # subnet-router anycast address
 580                                         # (rfc2373)
 581                                         ifconfig $i inet6 $j:: prefixlen 64 \
 582                                                 alias anycast
 583                                         ;;
 584                                 esac
 585                         done
 586                 fi
 587                 ipv6_ifconfig=`ifconfig_getargs $i ipv6`
 588                 if [ -n "${ipv6_ifconfig}" ]; then
 589                         rtsol_available=no
 590                         rtsol_interface=no
 591                         ifconfig $i inet6 ${ipv6_ifconfig} alias
 592                 fi
 593
 594                 if [ ${rtsol_available} = yes -a ${rtsol_interface} = yes ]
 595                 then
 596                         case ${i} in
 597                         lo0|gif[0-9]*|stf[0-9]*|lp[0-9]*|sl[0-9]*|tun[0-9]*)
 598                                 ;;
 599                         *)
 600                                 rtsol_interfaces="${rtsol_interfaces} ${i}"
 601                                 ;;
 602                         esac
 603                 else
 604                         ifconfig $i inet6
 605                 fi
 606         done
 607
 608         if [ ${rtsol_available} = yes -a -n "${rtsol_interfaces}" ]; then
 609                 # Act as endhost - automatically configured.
 610                 # You can configure only single interface, as
 611                 # specification assumes that autoconfigured host has
 612                 # single interface only.
 613                 sysctl net.inet6.ip6.accept_rtadv=1
 614                 set ${rtsol_interfaces}
 615                 ifconfig $1 up
 616                 rtsol $1
 617         fi
 618
 619         for i in $interfaces; do
 620                 alias=0
 621                 while : ; do
 622                         ipv6_ifconfig=`get_if_var $i ipv6_ifconfig_IF_alias${alias}`
 623                         if [ -z "${ipv6_ifconfig}" ]; then
 624                                 break;
 625                         fi
 626                         ifconfig $i inet6 ${ipv6_ifconfig} alias
 627                         alias=$((${alias} + 1))
 628                 done
 629         done
 630 }
 631
 632 # Setup IPv6 to IPv4 mapping
 633 network6_stf_setup()
 634 {
 635         case ${stf_interface_ipv4addr} in
 636         [Nn][Oo] | '')
 637                 ;;
 638         *)
 639                 # assign IPv6 addr and interface route for 6to4 interface
 640                 stf_prefixlen=$((16+${stf_interface_ipv4plen:-0}))
 641                 OIFS="$IFS"
 642                 IFS=".$IFS"
 643                 set ${stf_interface_ipv4addr}
 644                 IFS="$OIFS"
 645                 hexfrag1=`hexprint $(($1*256 + $2))`
 646                 hexfrag2=`hexprint $(($3*256 + $4))`
 647                 ipv4_in_hexformat="${hexfrag1}:${hexfrag2}"
 648                 case ${stf_interface_ipv6_ifid} in
 649                 [Aa][Uu][Tt][Oo] | '')
 650                         for i in ${ipv6_network_interfaces}; do
 651                                 laddr=`network6_getladdr ${i}`
 652                                 case ${laddr} in
 653                                 '')
 654                                         ;;
 655                                 *)
 656                                         break
 657                                         ;;
 658                                 esac
 659                         done
 660                         stf_interface_ipv6_ifid=`expr "${laddr}" : \
 661                                                       'fe80::\(.*\)%\(.*\)'`
 662                         case ${stf_interface_ipv6_ifid} in
 663                         '')
 664                                 stf_interface_ipv6_ifid=0:0:0:1
 665                                 ;;
 666                         esac
 667                         ;;
 668                 esac
 669                 ifconfig stf0 create >/dev/null 2>&1
 670                 ifconfig stf0 inet6 2002:${ipv4_in_hexformat}:${stf_interface_ipv6_slaid:-0}:${stf_interface_ipv6_ifid} \
 671                         prefixlen ${stf_prefixlen}
 672                 # disallow packets to malicious 6to4 prefix
 673                 route add -inet6 2002:e000:: -prefixlen 20 ::1 -reject
 674                 route add -inet6 2002:7f00:: -prefixlen 24 ::1 -reject
 675                 route add -inet6 2002:0000:: -prefixlen 24 ::1 -reject
 676                 route add -inet6 2002:ff00:: -prefixlen 24 ::1 -reject
 677                 ;;
 678         esac
 679 }
 680
 681 # Setup static routes
 682 network6_static_routes_setup()
 683 {
 684         # Set up any static routes.
 685         case ${ipv6_defaultrouter} in
 686         [Nn][Oo] | '')
 687                 ;;
 688         *)
 689                 ipv6_static_routes="default ${ipv6_static_routes}"
 690                 ipv6_route_default="default ${ipv6_defaultrouter}"
 691                 ;;
 692         esac
 693         case ${ipv6_static_routes} in
 694         [Nn][Oo] | '')
 695                 ;;
 696         *)
 697                 for i in ${ipv6_static_routes}; do
 698                         eval ipv6_route_args=\$ipv6_route_${i}
 699                         route add -inet6 ${ipv6_route_args}
 700                 done
 701                 ;;
 702         esac
 703 }
 704
 705 # Install the "default interface" to kernel, which will be used
 706 # as the default route when there's no router.
 707 network6_default_interface_setup()
 708 {
 709         # Choose IPv6 default interface if it is not clearly specified.
 710         case ${ipv6_default_interface} in
 711         '')
 712                 for i in ${ipv6_network_interfaces}; do
 713                         case $i in
 714                         lo0)
 715                                 continue
 716                                 ;;
 717                         esac
 718                         laddr=`network6_getladdr $i exclude_tentative`
 719                         case ${laddr} in
 720                         '')
 721                                 ;;
 722                         *)
 723                                 ipv6_default_interface=$i
 724                                 break
 725                                 ;;
 726                         esac
 727                 done
 728                 ;;
 729         esac
 730
 731         # Disallow unicast packets without outgoing scope identifiers,
 732         # or route such packets to a "default" interface, if it is specified.
 733         route add -inet6 fe80:: -prefixlen 10 ::1 -reject
 734         case ${ipv6_default_interface} in
 735         [Nn][Oo] | '')
 736                 route add -inet6 ff02:: -prefixlen 16 ::1 -reject
 737                 ;;
 738         *)
 739                 laddr=`network6_getladdr ${ipv6_default_interface}`
 740                 route add -inet6 ff02:: ${laddr} -prefixlen 16 -interface \
 741                         -cloning
 742
 743                 # Disable installing the default interface with the
 744                 # case net.inet6.ip6.forwarding=0 and
 745                 # net.inet6.ip6.accept_rtadv=0, due to avoid conflict
 746                 # between the default router list and the manual
 747                 # configured default route.
 748                 case ${ipv6_gateway_enable} in
 749                 [Yy][Ee][Ss])
 750                         ;;
 751                 *)
 752                         if [ `sysctl -n net.inet6.ip6.accept_rtadv` -eq 1 ]
 753                         then
 754                                 ndp -I ${ipv6_default_interface}
 755                         fi
 756                         ;;
 757                 esac
 758                 ;;
 759         esac
 760 }
 761
 762 network6_getladdr()
 763 {
 764         ifconfig $1 2>/dev/null | while read proto addr rest; do
 765                 case ${proto} in
 766                 inet6)
 767                         case ${addr} in
 768                         fe80::*)
 769                                 if [ -z "$2" ]; then
 770                                         echo ${addr}
 771                                         return
 772                                 fi
 773                                 case ${rest} in
 774                                 *tentative*)
 775                                         continue
 776                                         ;;
 777                                 *)
 778                                         echo ${addr}
 779                                         return
 780                                 esac
 781                         esac
 782                 esac
 783         done
 784 }