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 # $FreeBSD$
  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 up
  47                 ifconfig $1 ${ifconfig_args}
  48                 _cfg=0
  49         fi
  50
  51         if wpaif $1; then
  52                 if [ $_cfg -ne 0 ] ; then
  53                         ifconfig $1 up
  54                 fi
  55                 /etc/rc.d/wpa_supplicant start $1
  56                 _cfg=0          # XXX: not sure this should count
  57         fi
  58
  59         if dhcpif $1; then
  60                 if [ $_cfg -ne 0 ] ; then
  61                         ifconfig $1 up
  62                 fi
  63                 if syncdhcpif $1; then
  64                         /etc/rc.d/dhclient start $1
  65                 fi
  66                 _cfg=0
  67         fi
  68
  69         return $_cfg
  70 }
  71
  72 # ifconfig_down if
  73 #       Remove all inet entries from the $if interface. It returns
  74 #       0 if inet entries were found and removed. It returns 1 if
  75 #       no entries were found or they could not be removed.
  76 #
  77 #       XXX: should not be only inet
  78 #
  79 ifconfig_down()
  80 {
  81         [ -z "$1" ] && return 1
  82         _ifs="^"
  83         _cfg=1
  84
  85         inetList="`ifconfig $1 | grep 'inet ' | tr "\n" "$_ifs"`"
  86
  87         oldifs="$IFS"
  88         IFS="$_ifs"
  89         for _inet in $inetList ; do
  90                 # get rid of extraneous line
  91                 [ -z "$_inet" ] && break
  92
  93                 _inet=`expr "$_inet" : '.*\(inet \([0-9]\{1,3\}\.\)\{3\}[0-9]\{1,3\}\).*'`
  94
  95                 IFS="$oldifs"
  96                 ifconfig $1 ${_inet} delete
  97                 IFS="$_ifs"
  98                 _cfg=0
  99         done
 100         IFS="$oldifs"
 101
 102         if wpaif $1; then
 103                 /etc/rc.d/wpa_supplicant stop $1
 104                 _cfg=0
 105         fi
 106
 107         if dhcpif $1; then
 108                 /etc/rc.d/dhclient stop $1
 109                 _cfg=0
 110         fi
 111
 112         ifconfig $1 down
 113
 114         return $_cfg
 115 }
 116
 117 # get_if_var if var [default]
 118 #       Return the value of the pseudo-hash corresponding to $if where
 119 #       $var is a string containg the sub-string "IF" which will be
 120 #       replaced with $if after the characters defined in _punct are
 121 #       replaced with '_'. If the variable is unset, replace it with
 122 #       $default if given.
 123 get_if_var()
 124 {
 125         if [ $# -ne 2 -a $# -ne 3 ]; then
 126                 err 3 'USAGE: get_if_var name var [default]'
 127         fi
 128
 129         _if=$1
 130         _punct=". - / +"
 131         for _punct_c in $_punct; do
 132                 _if=`ltr ${_if} ${_punct_c} '_'`
 133         done
 134         _var=$2
 135         _default=$3
 136
 137         prefix=${_var%%IF*}
 138         suffix=${_var##*IF}
 139         eval echo \${${prefix}${_if}${suffix}-${_default}}
 140 }
 141
 142 # _ifconfig_getargs if
 143 #       Echos the arguments for the supplied interface to stdout.
 144 #       returns 1 if empty.  In general, ifconfig_getargs should be used
 145 #       outside this file.
 146 _ifconfig_getargs()
 147 {
 148         _ifn=$1
 149         if [ -z "$_ifn" ]; then
 150                 return 1
 151         fi
 152
 153         get_if_var $_ifn ifconfig_IF "$ifconfig_DEFAULT"
 154 }
 155
 156 # ifconfig_getargs if
 157 #       Takes the result from _ifconfig_getargs and removes pseudo
 158 #       args such as DHCP and WPA.
 159 ifconfig_getargs()
 160 {
 161         _tmpargs=`_ifconfig_getargs $1`
 162         if [ $? -eq 1 ]; then
 163                 return 1
 164         fi
 165         _args=
 166
 167         for _arg in $_tmpargs; do
 168                 case $_arg in
 169                 [Dd][Hh][Cc][Pp]) ;;
 170                 [Nn][Oo][Aa][Uu][Tt][Oo]) ;;
 171                 [Nn][Oo][Ss][Yy][Nn][Cc][Dd][Hh][Cc][Pp]) ;;
 172                 [Ss][Yy][Nn][Cc][Dd][Hh][Cc][Pp]) ;;
 173                 [Ww][Pp][Aa]) ;;
 174                 *)
 175                         _args="$_args $_arg"
 176                         ;;
 177                 esac
 178         done
 179
 180         echo $_args
 181 }
 182
 183 # autoif
 184 #       Returns 0 if the interface should be automaticly configured at
 185 #       boot time and 1 otherwise.
 186 autoif()
 187 {
 188         _tmpargs=`_ifconfig_getargs $1`
 189         for _arg in $_tmpargs; do
 190                 case $_arg in
 191                 [Nn][Oo][Aa][Uu][Tt][Oo])
 192                         return 1
 193                         ;;
 194                 esac
 195         done
 196         return 0
 197 }
 198
 199 # dhcpif if
 200 #       Returns 0 if the interface is a DHCP interface and 1 otherwise.
 201 dhcpif()
 202 {
 203         _tmpargs=`_ifconfig_getargs $1`
 204         for _arg in $_tmpargs; do
 205                 case $_arg in
 206                 [Dd][Hh][Cc][Pp])
 207                         return 0
 208                         ;;
 209                 [Nn][Oo][Ss][Yy][Nn][Cc][Dd][Hh][Cc][Pp])
 210                         return 0
 211                         ;;
 212                 [Ss][Yy][Nn][Cc][Dd][Hh][Cc][Pp])
 213                         return 0
 214                         ;;
 215                 esac
 216         done
 217         return 1
 218 }
 219
 220 # syncdhcpif
 221 #       Returns 0 if the interface should be configured synchronously and
 222 #       1 otherwise.
 223 syncdhcpif()
 224 {
 225         _tmpargs=`_ifconfig_getargs $1`
 226         for _arg in $_tmpargs; do
 227                 case $_arg in
 228                 [Nn][Oo][Ss][Yy][Nn][Cc][Dd][Hh][Cc][Pp])
 229                         return 1
 230                         ;;
 231                 [Ss][Yy][Nn][Cc][Dd][Hh][Cc][Pp])
 232                         return 0
 233                         ;;
 234                 esac
 235         done
 236         if checkyesno synchronous_dhclient; then
 237                 return 0
 238         else
 239                 return 1
 240         fi
 241 }
 242
 243 # wpaif if
 244 #       Returns 0 if the interface is a WPA interface and 1 otherwise.
 245 wpaif()
 246 {
 247         _tmpargs=`_ifconfig_getargs $1`
 248         for _arg in $_tmpargs; do
 249                 case $_arg in
 250                 [Ww][Pp][Aa])
 251                         return 0
 252                         ;;
 253                 esac
 254         done
 255         return 1
 256 }
 257
 258 # ipv4_up if
 259 #  add IPv4 addresses to the interface $if
 260 ipv4_up()
 261 {
 262         _if=$1
 263         ifalias_up ${_if}
 264         ipv4_addrs_common ${_if} alias
 265 }
 266
 267 # ipv4_down if
 268 #  remove IPv4 addresses from the interface $if
 269 ipv4_down()
 270 {
 271         _if=$1
 272         ifalias_down ${_if}
 273         ipv4_addrs_common ${_if} -alias
 274 }
 275
 276 # ipv4_addrs_common if action
 277 #   Evaluate the ifconfig_if_ipv4 arguments for interface $if
 278 #   and use $action to add or remove IPv4 addresses from $if.
 279 ipv4_addrs_common()
 280 {
 281         _ret=1
 282         _if=$1
 283         _action=$2
 284
 285         # get ipv4-addresses
 286         cidr_addr=`get_if_var $_if ipv4_addrs_IF`
 287
 288         for _cidr in ${cidr_addr}; do
 289                 _ipaddr=${_cidr%%/*}
 290                 _netmask="/"${_cidr##*/}
 291                 _range=${_ipaddr##*.}
 292                 _ipnet=${_ipaddr%.*}
 293                 _iplow=${_range%-*}
 294                 _iphigh=${_range#*-}
 295
 296                 # clear netmask when removing aliases
 297                 if [ "${_action}" = "-alias" ]; then
 298                         _netmask=""
 299                 fi
 300
 301                 _ipcount=${_iplow}
 302                 while [ "${_ipcount}" -le "${_iphigh}" ]; do
 303                         eval "ifconfig ${_if} ${_action} ${_ipnet}.${_ipcount}${_netmask}"
 304                         _ipcount=$((${_ipcount}+1))
 305                         _ret=0
 306
 307                         # only the first ipaddr in a subnet need the real netmask
 308                         if [ "${_action}" != "-alias" ]; then
 309                                 _netmask="/32"
 310                         fi
 311                 done
 312         done
 313         return $_ret
 314 }
 315
 316 # ifalias_up if
 317 #       Configure aliases for network interface $if.
 318 #       It returns 0 if at least one alias was configured or
 319 #       1 if there were none.
 320 #
 321 ifalias_up()
 322 {
 323         _ret=1
 324         alias=0
 325         while : ; do
 326                 ifconfig_args=`get_if_var $1 ifconfig_IF_alias${alias}`
 327                 if [ -n "${ifconfig_args}" ]; then
 328                         ifconfig $1 ${ifconfig_args} alias
 329                         alias=$((${alias} + 1))
 330                         _ret=0
 331                 else
 332                         break
 333                 fi
 334         done
 335         return $_ret
 336 }
 337
 338 #ifalias_down if
 339 #       Remove aliases for network interface $if.
 340 #       It returns 0 if at least one alias was removed or
 341 #       1 if there were none.
 342 #
 343 ifalias_down()
 344 {
 345         _ret=1
 346         alias=0
 347         while : ; do
 348                 ifconfig_args=`get_if_var $1 ifconfig_IF_alias${alias}`
 349                 if [ -n "${ifconfig_args}" ]; then
 350                         ifconfig $1 ${ifconfig_args} -alias
 351                         alias=$((${alias} + 1))
 352                         _ret=0
 353                 else
 354                         break
 355                 fi
 356         done
 357         return $_ret
 358 }
 359
 360 # ifscript_up if
 361 #       Evaluate a startup script for the $if interface.
 362 #       It returns 0 if a script was found and processed or
 363 #       1 if no script was found.
 364 #
 365 ifscript_up()
 366 {
 367         if [ -r /etc/start_if.$1 ]; then
 368                 . /etc/start_if.$1
 369                 return 0
 370         fi
 371         return 1
 372 }
 373
 374 # ifscript_down if
 375 #       Evaluate a shutdown script for the $if interface.
 376 #       It returns 0 if a script was found and processed or
 377 #       1 if no script was found.
 378 #
 379 ifscript_down()
 380 {
 381         if [ -r /etc/stop_if.$1 ]; then
 382                 . /etc/stop_if.$1
 383                 return 0
 384         fi
 385         return 1
 386 }
 387
 388 # Create cloneable interfaces.
 389 #
 390 clone_up()
 391 {
 392         _prefix=
 393         _list=
 394         for ifn in ${cloned_interfaces}; do
 395                 ifconfig ${ifn} create
 396                 if [ $? -eq 0 ]; then
 397                         _list="${_list}${_prefix}${ifn}"
 398                         [ -z "$_prefix" ] && _prefix=' '
 399                 fi
 400         done
 401         debug "Cloned: ${_list}"
 402 }
 403
 404 # Destroy cloned interfaces. Destroyed interfaces are echoed
 405 # to standard output.
 406 #
 407 clone_down()
 408 {
 409         _prefix=
 410         _list=
 411         for ifn in ${cloned_interfaces}; do
 412                 ifconfig ${ifn} destroy
 413                 if [ $? -eq 0 ]; then
 414                         _list="${_list}${_prefix}${ifn}"
 415                         [ -z "$_prefix" ] && _prefix=' '
 416                 fi
 417         done
 418         debug "Destroyed clones: ${_list}"
 419 }
 420
 421 gif_up() {
 422         case ${gif_interfaces} in
 423         [Nn][Oo] | '')
 424                 ;;
 425         *)
 426                 for i in ${gif_interfaces}; do
 427                         peers=`get_if_var $i gifconfig_IF`
 428                         case ${peers} in
 429                         '')
 430                                 continue
 431                                 ;;
 432                         *)
 433                                 ifconfig $i create >/dev/null 2>&1
 434                                 ifconfig $i tunnel ${peers}
 435                                 ifconfig $i up
 436                                 ;;
 437                         esac
 438                 done
 439                 ;;
 440         esac
 441 }
 442
 443 #
 444 # ipx_up ifn
 445 # Configure any IPX addresses for interface $ifn. Returns 0 if IPX
 446 # arguments were found and configured; returns 1 otherwise.
 447 #
 448 ipx_up()
 449 {
 450         ifn="$1"
 451         ifconfig_args=`get_if_var $ifn ifconfig_IF_ipx`
 452         if [ -n "${ifconfig_args}" ]; then
 453                 ifconfig ${ifn} ${ifconfig_args}
 454                 return 0
 455         fi
 456         return 1
 457 }
 458
 459 # ipx_down ifn
 460 #       Remove IPX addresses for interface $ifn. Returns 0 if IPX
 461 #       addresses were found and unconfigured. It returns 1, otherwise.
 462 #
 463 ipx_down()
 464 {
 465         [ -z "$1" ] && return 1
 466         _ifs="^"
 467         _ret=1
 468
 469         ipxList="`ifconfig $1 | grep 'ipx ' | tr "\n" "$_ifs"`"
 470
 471         oldifs="$IFS"
 472         IFS="$_ifs"
 473         for _ipx in $ipxList ; do
 474                 # get rid of extraneous line
 475                 [ -z "$_ipx" ] && break
 476
 477                 _ipx=`expr "$_ipx" : '.*\(ipx [0-9a-h]\{1,8\}H*\.[0-9a-h]\{1,12\}\).*'`
 478
 479                 IFS="$oldifs"
 480                 ifconfig $1 ${_ipx} delete
 481                 IFS="$_ifs"
 482                 _ret=0
 483         done
 484         IFS="$oldifs"
 485
 486         return $_ret
 487 }
 488
 489 # ifnet_rename
 490 #       Rename all requested interfaces.
 491 #
 492 ifnet_rename()
 493 {
 494
 495         _ifn_list="`ifconfig -l`"
 496         [ -z "$_ifn_list" ] && return 0
 497         for _if in ${_ifn_list} ; do
 498                 _ifname=`get_if_var $_if ifconfig_IF_name`
 499                 if [ ! -z "$_ifname" ]; then
 500                         ifconfig $_if name $_ifname
 501                 fi
 502         done
 503         return 0
 504 }
 505
 506 #
 507 # list_net_interfaces type
 508 #       List all network interfaces. The type of interface returned
 509 #       can be controlled by the type argument. The type
 510 #       argument can be any of the following:
 511 #               nodhcp - all interfaces, excluding DHCP configured interfaces
 512 #               dhcp   - list only DHCP configured interfaces
 513 #       If no argument is specified all network interfaces are output.
 514 #       Note that the list will include cloned interfaces if applicable.
 515 #       Cloned interfaces must already exist to have a chance to appear
 516 #       in the list if ${network_interfaces} is set to `auto'.
 517 #
 518 list_net_interfaces()
 519 {
 520         type=$1
 521
 522         # Get a list of ALL the interfaces and make lo0 first if it's there.
 523         #
 524         case ${network_interfaces} in
 525         [Aa][Uu][Tt][Oo])
 526                 _prefix=''
 527                 _autolist="`ifconfig -l`"
 528                 _lo=
 529                 for _if in ${_autolist} ; do
 530                         if autoif $_if; then
 531                                 if [ "$_if" = "lo0" ]; then
 532                                         _lo="lo0 "
 533                                 else
 534                                         _tmplist="${_tmplist}${_prefix}${_if}"
 535                                         [ -z "$_prefix" ] && _prefix=' '
 536                                 fi
 537                         fi
 538                 done
 539                 _tmplist="${_lo}${_tmplist}"
 540                 ;;
 541         *)
 542                 _tmplist="${network_interfaces} ${cloned_interfaces}"
 543                 ;;
 544         esac
 545
 546         if [ -z "$type" ]; then
 547                 echo $_tmplist
 548                 return 0
 549         fi
 550
 551         # Separate out dhcp and non-dhcp interfaces
 552         #
 553         _aprefix=
 554         _bprefix=
 555         for _if in ${_tmplist} ; do
 556                 if dhcpif $_if; then
 557                         _dhcplist="${_dhcplist}${_aprefix}${_if}"
 558                         [ -z "$_aprefix" ] && _aprefix=' '
 559                 elif [ -n "`_ifconfig_getargs $_if`" ]; then
 560                         _nodhcplist="${_nodhcplist}${_bprefix}${_if}"
 561                         [ -z "$_bprefix" ] && _bprefix=' '
 562                 fi
 563         done
 564
 565         case "$type" in
 566         nodhcp)
 567                 echo $_nodhcplist
 568                 ;;
 569         dhcp)
 570                 echo $_dhcplist
 571                 ;;
 572         esac
 573         return 0
 574 }
 575
 576 hexdigit()
 577 {
 578         if [ $1 -lt 10 ]; then
 579                 echo $1
 580         else
 581                 case $1 in
 582                 10)     echo a ;;
 583                 11)     echo b ;;
 584                 12)     echo c ;;
 585                 13)     echo d ;;
 586                 14)     echo e ;;
 587                 15)     echo f ;;
 588                 esac
 589         fi
 590 }
 591
 592 hexprint()
 593 {
 594         val=$1
 595         str=''
 596
 597         dig=`hexdigit $((${val} & 15))`
 598         str=${dig}${str}
 599         val=$((${val} >> 4))
 600         while [ ${val} -gt 0 ]; do
 601                 dig=`hexdigit $((${val} & 15))`
 602                 str=${dig}${str}
 603                 val=$((${val} >> 4))
 604         done
 605
 606         echo ${str}
 607 }
 608
 609 # Setup the interfaces for IPv6
 610 network6_interface_setup()
 611 {
 612         interfaces=$*
 613         rtsol_interfaces=''
 614         case ${ipv6_gateway_enable} in
 615         [Yy][Ee][Ss])
 616                 rtsol_available=no
 617                 ;;
 618         *)
 619                 rtsol_available=yes
 620                 ;;
 621         esac
 622         for i in $interfaces; do
 623                 rtsol_interface=yes
 624                 prefix=`get_if_var $i ipv6_prefix_IF`
 625                 if [ -n "${prefix}" ]; then
 626                         rtsol_available=no
 627                         rtsol_interface=no
 628                         laddr=`network6_getladdr $i`
 629                         hostid=`expr "${laddr}" : 'fe80::\(.*\)%\(.*\)'`
 630                         for j in ${prefix}; do
 631                                 address=$j\:${hostid}
 632                                 ifconfig $i inet6 ${address} prefixlen 64 alias
 633
 634                                 case ${ipv6_gateway_enable} in
 635                                 [Yy][Ee][Ss])
 636                                         # subnet-router anycast address
 637                                         # (rfc2373)
 638                                         ifconfig $i inet6 $j:: prefixlen 64 \
 639                                                 alias anycast
 640                                         ;;
 641                                 esac
 642                         done
 643                 fi
 644                 ipv6_ifconfig=`get_if_var $i ipv6_ifconfig_IF`
 645                 if [ -n "${ipv6_ifconfig}" ]; then
 646                         rtsol_available=no
 647                         rtsol_interface=no
 648                         ifconfig $i inet6 ${ipv6_ifconfig} alias
 649                 fi
 650
 651                 if [ ${rtsol_available} = yes -a ${rtsol_interface} = yes ]
 652                 then
 653                         case ${i} in
 654                         lo0|gif[0-9]*|stf[0-9]*|faith[0-9]*|lp[0-9]*|sl[0-9]*|tun[0-9]*)
 655                                 ;;
 656                         *)
 657                                 rtsol_interfaces="${rtsol_interfaces} ${i}"
 658                                 ;;
 659                         esac
 660                 else
 661                         ifconfig $i inet6
 662                 fi
 663         done
 664
 665         if [ ${rtsol_available} = yes -a -n "${rtsol_interfaces}" ]; then
 666                 # Act as endhost - automatically configured.
 667                 # You can configure only single interface, as
 668                 # specification assumes that autoconfigured host has
 669                 # single interface only.
 670                 sysctl net.inet6.ip6.accept_rtadv=1
 671                 set ${rtsol_interfaces}
 672                 ifconfig $1 up
 673                 rtsol ${rtsol_flags} $1
 674         fi
 675
 676         for i in $interfaces; do
 677                 alias=0
 678                 while : ; do
 679                         ipv6_ifconfig=`get_if_var $i ipv6_ifconfig_IF_alias${alias}`
 680                         if [ -z "${ipv6_ifconfig}" ]; then
 681                                 break;
 682                         fi
 683                         ifconfig $i inet6 ${ipv6_ifconfig} alias
 684                         alias=$((${alias} + 1))
 685                 done
 686         done
 687 }
 688
 689 # Setup IPv6 to IPv4 mapping
 690 network6_stf_setup()
 691 {
 692         case ${stf_interface_ipv4addr} in
 693         [Nn][Oo] | '')
 694                 ;;
 695         *)
 696                 # assign IPv6 addr and interface route for 6to4 interface
 697                 stf_prefixlen=$((16+${stf_interface_ipv4plen:-0}))
 698                 OIFS="$IFS"
 699                 IFS=".$IFS"
 700                 set ${stf_interface_ipv4addr}
 701                 IFS="$OIFS"
 702                 hexfrag1=`hexprint $(($1*256 + $2))`
 703                 hexfrag2=`hexprint $(($3*256 + $4))`
 704                 ipv4_in_hexformat="${hexfrag1}:${hexfrag2}"
 705                 case ${stf_interface_ipv6_ifid} in
 706                 [Aa][Uu][Tt][Oo] | '')
 707                         for i in ${ipv6_network_interfaces}; do
 708                                 laddr=`network6_getladdr ${i}`
 709                                 case ${laddr} in
 710                                 '')
 711                                         ;;
 712                                 *)
 713                                         break
 714                                         ;;
 715                                 esac
 716                         done
 717                         stf_interface_ipv6_ifid=`expr "${laddr}" : \
 718                                                       'fe80::\(.*\)%\(.*\)'`
 719                         case ${stf_interface_ipv6_ifid} in
 720                         '')
 721                                 stf_interface_ipv6_ifid=0:0:0:1
 722                                 ;;
 723                         esac
 724                         ;;
 725                 esac
 726                 ifconfig stf0 create >/dev/null 2>&1
 727                 ifconfig stf0 inet6 2002:${ipv4_in_hexformat}:${stf_interface_ipv6_slaid:-0}:${stf_interface_ipv6_ifid} \
 728                         prefixlen ${stf_prefixlen}
 729                 # disallow packets to malicious 6to4 prefix
 730                 route add -inet6 2002:e000:: -prefixlen 20 ::1 -reject
 731                 route add -inet6 2002:7f00:: -prefixlen 24 ::1 -reject
 732                 route add -inet6 2002:0000:: -prefixlen 24 ::1 -reject
 733                 route add -inet6 2002:ff00:: -prefixlen 24 ::1 -reject
 734                 ;;
 735         esac
 736 }
 737
 738 # Setup static routes
 739 network6_static_routes_setup()
 740 {
 741         # Set up any static routes.
 742         case ${ipv6_defaultrouter} in
 743         [Nn][Oo] | '')
 744                 ;;
 745         *)
 746                 ipv6_static_routes="default ${ipv6_static_routes}"
 747                 ipv6_route_default="default ${ipv6_defaultrouter}"
 748                 ;;
 749         esac
 750         case ${ipv6_static_routes} in
 751         [Nn][Oo] | '')
 752                 ;;
 753         *)
 754                 for i in ${ipv6_static_routes}; do
 755                         ipv6_route_args=`get_if_var $i ipv6_route_IF`
 756                         route add -inet6 ${ipv6_route_args}
 757                 done
 758                 ;;
 759         esac
 760 }
 761
 762 # Setup faith
 763 network6_faith_setup()
 764 {
 765         case ${ipv6_faith_prefix} in
 766         [Nn][Oo] | '')
 767                 ;;
 768         *)
 769                 sysctl net.inet6.ip6.keepfaith=1
 770                 ifconfig faith0 create >/dev/null 2>&1
 771                 ifconfig faith0 up
 772                 for prefix in ${ipv6_faith_prefix}; do
 773                         prefixlen=`expr "${prefix}" : ".*/\(.*\)"`
 774                         case ${prefixlen} in
 775                         '')
 776                                 prefixlen=96
 777                                 ;;
 778                         *)
 779                                 prefix=`expr "${prefix}" : \
 780                                              "\(.*\)/${prefixlen}"`
 781                                 ;;
 782                         esac
 783                         route add -inet6 ${prefix} -prefixlen ${prefixlen} ::1
 784                         route change -inet6 ${prefix} -prefixlen ${prefixlen} \
 785                                 -ifp faith0
 786                 done
 787                 ;;
 788         esac
 789 }
 790
 791 # Install the "default interface" to kernel, which will be used
 792 # as the default route when there's no router.
 793 network6_default_interface_setup()
 794 {
 795         # Choose IPv6 default interface if it is not clearly specified.
 796         case ${ipv6_default_interface} in
 797         '')
 798                 for i in ${ipv6_network_interfaces}; do
 799                         case $i in
 800                         lo0|faith[0-9]*)
 801                                 continue
 802                                 ;;
 803                         esac
 804                         laddr=`network6_getladdr $i exclude_tentative`
 805                         case ${laddr} in
 806                         '')
 807                                 ;;
 808                         *)
 809                                 ipv6_default_interface=$i
 810                                 break
 811                                 ;;
 812                         esac
 813                 done
 814                 ;;
 815         esac
 816
 817         # Disallow unicast packets without outgoing scope identifiers,
 818         # or route such packets to a "default" interface, if it is specified.
 819         route add -inet6 fe80:: -prefixlen 10 ::1 -reject
 820         case ${ipv6_default_interface} in
 821         [Nn][Oo] | '')
 822                 route add -inet6 ff02:: -prefixlen 16 ::1 -reject
 823                 ;;
 824         *)
 825                 laddr=`network6_getladdr ${ipv6_default_interface}`
 826                 route add -inet6 ff02:: ${laddr} -prefixlen 16 -interface \
 827                         -cloning
 828
 829                 # Disable installing the default interface with the
 830                 # case net.inet6.ip6.forwarding=0 and
 831                 # net.inet6.ip6.accept_rtadv=0, due to avoid conflict
 832                 # between the default router list and the manual
 833                 # configured default route.
 834                 case ${ipv6_gateway_enable} in
 835                 [Yy][Ee][Ss])
 836                         ;;
 837                 *)
 838                         if [ `sysctl -n net.inet6.ip6.accept_rtadv` -eq 1 ]
 839                         then
 840                                 ndp -I ${ipv6_default_interface}
 841                         fi
 842                         ;;
 843                 esac
 844                 ;;
 845         esac
 846 }
 847
 848 network6_getladdr()
 849 {
 850         ifconfig $1 2>/dev/null | while read proto addr rest; do
 851                 case ${proto} in
 852                 inet6)
 853                         case ${addr} in
 854                         fe80::*)
 855                                 if [ -z "$2" ]; then
 856                                         echo ${addr}
 857                                         return
 858                                 fi
 859                                 case ${rest} in
 860                                 *tentative*)
 861                                         continue
 862                                         ;;
 863                                 *)
 864                                         echo ${addr}
 865                                         return
 866                                 esac
 867                         esac
 868                 esac
 869         done
 870 }