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 /etc/rc.subr 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         local _cfg ifconfig_args
  43         _cfg=1
  44
  45         ifconfig_args=`ifconfig_getargs $1`
  46         if [ -n "${ifconfig_args}" ]; then
  47                 ifconfig $1 ${ifconfig_args}
  48                 ifconfig $1 up
  49                 _cfg=0
  50         fi
  51
  52         if wpaif $1; then
  53                 ifconfig $1 up
  54                 /etc/rc.d/wpa_supplicant start $1
  55                 # NOTE: wpa_supplicant(8) needs to control the interface's
  56                 #       state in order to perform the SSID scan.  But
  57                 #       dhcpcd(8), which may be started by the "dhcp_client"
  58                 #       below, can race against wpa_supplicant(8) and modify
  59                 #       the interface's state, breaking the SSID scan and
  60                 #       preventing the SSID association.
  61                 #       Insert a small delay here to workaround the issue.
  62                 sleep 1
  63                 _cfg=0          # XXX: not sure this should count
  64         fi
  65
  66         if dhcpif $1; then
  67                 /etc/rc.d/dhcp_client start $1
  68                 _cfg=0
  69         fi
  70
  71         return $_cfg
  72 }
  73
  74 # ifconfig_down if
  75 #       Remove all inet entries from the $if interface. It returns
  76 #       0 if inet entries were found and removed. It returns 1 if
  77 #       no entries were found or they could not be removed.
  78 #
  79 ifconfig_down()
  80 {
  81         local _cfg _ifs oldifs _inet inetList
  82
  83         [ -z "$1" ] && return 1
  84         _ifs="^"
  85         _cfg=1
  86
  87         inetList="`ifconfig $1 | grep 'inet ' | tr "\n" "$_ifs"`"
  88
  89         oldifs="$IFS"
  90         IFS="$_ifs"
  91         for _inet in $inetList ; do
  92                 # get rid of extraneous line
  93                 [ -z "$_inet" ] && break
  94
  95                 _inet=`expr "$_inet" : '.*\(inet \([0-9]\{1,3\}\.\)\{3\}[0-9]\{1,3\}\).*'`
  96
  97                 IFS="$oldifs"
  98                 ifconfig $1 ${_inet} delete
  99                 IFS="$_ifs"
 100                 _cfg=0
 101         done
 102         IFS="$oldifs"
 103
 104         if wpaif $1; then
 105                 /etc/rc.d/wpa_supplicant stop $1
 106         fi
 107
 108         if dhcpif $1; then
 109                 /etc/rc.d/dhcp_client stop $1
 110                 _cfg=0
 111         fi
 112
 113         if ifexists $1; then
 114                 ifconfig $1 down
 115                 _cfg=0
 116         fi
 117
 118         return $_cfg
 119 }
 120
 121 # get_if_var if var [default]
 122 #       Return the value of the pseudo-hash corresponding to $if where
 123 #       $var is a string containg the sub-string "IF" which will be
 124 #       replaced with $if after the characters defined in _punct are
 125 #       replaced with '_'. If the variable is unset, replace it with
 126 #       $default if given.
 127 #
 128 get_if_var()
 129 {
 130         local _if _punct_c _punct _var _default prefix suffix
 131
 132         if [ $# -ne 2 -a $# -ne 3 ]; then
 133                 err 3 'USAGE: get_if_var name var [default]'
 134         fi
 135
 136         _if=$1
 137         _punct=". - / +"
 138         for _punct_c in $_punct; do
 139                 _if=`ltr ${_if} ${_punct_c} '_'`
 140         done
 141         _var=$2
 142         _default=$3
 143
 144         prefix=${_var%%IF*}
 145         suffix=${_var##*IF}
 146         eval echo \${${prefix}${_if}${suffix}-${_default}}
 147 }
 148
 149 # _ifconfig_getargs if [af]
 150 #       Echos the arguments for the supplied interface to stdout.
 151 #       Returns 1 if no interface is specified.
 152 #       In general, the ifconfig_getargs() below should be used outside
 153 #       this file.
 154 #
 155 _ifconfig_getargs()
 156 {
 157         local _if _ifn _af _args
 158
 159         _ifn=$1
 160         _af=${2:+${2}_}
 161
 162         if [ -z "$_ifn" ]; then
 163                 return 1
 164         fi
 165
 166         _args=`get_if_var $_ifn ${_af}ifconfig_IF`
 167         if [ -z "$_args" -a -n "${pccard_ifconfig}" ]; then
 168                 for _if in ${removable_interfaces} ; do
 169                         if [ "$_if" = "$_ifn" ] ; then
 170                                 _args=${pccard_ifconfig}
 171                                 break
 172                         fi
 173                 done
 174         fi
 175
 176         echo $_args
 177 }
 178
 179 # ifconfig_getargs if [af]
 180 #       Takes the result from _ifconfig_getargs() and removes pseudo
 181 #       args such as DHCP and WPA.
 182 #
 183 ifconfig_getargs()
 184 {
 185         local _tmpargs _arg _args is_optarg
 186
 187         _tmpargs=`_ifconfig_getargs $1 $2`
 188         if [ $? -eq 1 ]; then
 189                 return 1
 190         fi
 191         _args=
 192
 193         is_optarg=no
 194         for _arg in $_tmpargs; do
 195                 if [ "$is_optarg" = "no" ]; then
 196                         case $_arg in
 197                         [Dd][Hh][Cc][Pp])
 198                                 ;;
 199                         [Ww][Pp][Aa])
 200                                 ;;
 201                         *)
 202                                 _args="$_args $_arg"
 203                                 case $_arg in
 204                                 authmode)
 205                                         is_optarg=yes
 206                                         ;;
 207                                 esac
 208                                 ;;
 209                         esac
 210                 else
 211                         _args="$_args $_arg"
 212                         is_optarg=no
 213                 fi
 214         done
 215
 216         echo $_args
 217 }
 218
 219 # ipv6if if
 220 #       Returns 0 if the interface should be configured for IPv6 and
 221 #       1 otherwise.
 222 #
 223 ipv6if()
 224 {
 225         local _if _tmpargs
 226         _if=$1
 227
 228         # lo0 is always IPv6-enabled
 229         if [ "$_if" = "lo0" ]; then
 230                 return 0
 231         fi
 232
 233         case ${ipv6_enable} in
 234         [Nn][Oo]|[Ff][Aa][Ll][Ss][Ee]|[Oo][Ff][Ff]|0)
 235                 return 1
 236                 ;;
 237         esac
 238
 239         case "${ipv6_network_interfaces}" in
 240         $_if|"$_if "*|*" $_if"|*" $_if "*|[Aa][Uu][Tt][Oo])
 241                 # True if $ipv6_ifconfig_IF is defined.
 242                 _tmpargs=`_ifconfig_getargs $_if ipv6`
 243                 if [ -n "${_tmpargs}" ]; then
 244                         return 0
 245                 fi
 246
 247                 # True if $ipv6_prefix_IF is defined.
 248                 _tmpargs=`get_if_var $_if ipv6_prefix_IF`
 249                 if [ -n "${_tmpargs}" ]; then
 250                         return 0
 251                 fi
 252
 253                 ;;
 254         esac
 255
 256         return 1
 257 }
 258
 259 # dhcpif if [ipv4|ipv6]
 260 #       Returns 0 if the interface needs DHCP for IPv4/IPv6 and 1 otherwise.
 261 #       If the second argument is "ipv4" (or "ipv6"), then only IPv4 (or
 262 #       IPv6) is checked, otherwise both are checked.
 263 #
 264 dhcpif()
 265 {
 266         local _tmpargs _arg _if _af
 267         _if=$1
 268         _af=$2
 269
 270         if [ -z "$_af" -o "$_af" = "ipv4" ]; then
 271                 _tmpargs=`_ifconfig_getargs $_if`
 272                 for _arg in $_tmpargs; do
 273                         case $_arg in
 274                         [Dd][Hh][Cc][Pp])
 275                                 return 0
 276                                 ;;
 277                         esac
 278                 done
 279         fi
 280
 281         if [ -z "$_af" -o "$_af" = "ipv6" ] && ipv6if $_if; then
 282                 _tmpargs=`_ifconfig_getargs $_if ipv6`
 283                 for _arg in $_tmpargs; do
 284                         case $_arg in
 285                         [Dd][Hh][Cc][Pp])
 286                                 return 0
 287                                 ;;
 288                         esac
 289                 done
 290         fi
 291
 292         return 1
 293 }
 294
 295 # wpaif if
 296 #       Returns 0 if the interface is a WPA interface and 1 otherwise.
 297 #
 298 wpaif()
 299 {
 300         local _tmpargs _arg is_optarg
 301
 302         _tmpargs=`_ifconfig_getargs $1`
 303         is_optarg=no
 304         for _arg in $_tmpargs; do
 305                 if [ "$is_optarg" = "no" ]; then
 306                         case $_arg in
 307                         [Ww][Pp][Aa])
 308                                 return 0
 309                                 ;;
 310                         authmode)
 311                                 is_optarg=yes
 312                                 ;;
 313                         esac
 314                 else
 315                         is_optarg=no
 316                 fi
 317         done
 318
 319         return 1
 320 }
 321
 322 # ifexists if
 323 #       Returns 0 if the interface exists and 1 otherwise.
 324 #
 325 ifexists()
 326 {
 327         [ -z "$1" ] && return 1
 328         ifconfig -n $1 >/dev/null 2>&1
 329 }
 330
 331 # ifalias_common if action [ipv6]
 332 #       Helper function for ifalias_up() and ifalias_down().
 333 #       The $action argument can be either "alias" (to add an
 334 #       alias) or "-alias" (to remove an alias).
 335 #       Returns 0 if at least one alias was added/removed or
 336 #       1 if there were none.
 337 #
 338 ifalias_common()
 339 {
 340         local _if _action _af _af2 _ret _var _args _alias
 341         _if=$1
 342         _action=$2
 343         _af=$3
 344
 345         _ret=1
 346         _alias=0
 347         while : ; do
 348                 if [ "${_af}" = "ipv6" ]; then
 349                         _af2="inet6"
 350                         _var="ipv6_ifconfig_IF_alias${_alias}"
 351                 else
 352                         _af2="inet"
 353                         _var="ifconfig_IF_alias${_alias}"
 354                 fi
 355                 _args=`get_if_var $_if $_var`
 356                 _args="${_args#${_af2} }"
 357                 if [ -z "${_args}" ]; then
 358                         break
 359                 fi
 360                 ifconfig $_if $_af2 $_args $_action
 361                 _alias=$((${_alias} + 1))
 362                 _ret=0
 363         done
 364         return $_ret
 365 }
 366
 367 # ifalias_up if [ipv6]
 368 #       Configure IPv4 aliases for network interface $if or
 369 #       IPv6 aliases if the second argument is "ipv6".
 370 #       It returns 0 if at least one alias was configured or
 371 #       1 if there were none.
 372 #
 373 ifalias_up()
 374 {
 375         ifalias_common $1 alias $2
 376 }
 377
 378 # ifalias_down if [ipv6]
 379 #       Remove IPv4 aliases for network interface $if or
 380 #       IPv6 aliases if the second argument is "ipv6".
 381 #       It returns 0 if at least one alias was removed or
 382 #       1 if there were none.
 383 #
 384 ifalias_down()
 385 {
 386         ifalias_common $1 -alias $2
 387 }
 388
 389 # ifscript_up if
 390 #       Evaluate a startup script for the $if interface.
 391 #       It returns 0 if a script was found and processed or
 392 #       1 if no script was found.
 393 #
 394 ifscript_up()
 395 {
 396         if [ -r /etc/start_if.$1 ]; then
 397                 . /etc/start_if.$1
 398                 return 0
 399         fi
 400         return 1
 401 }
 402
 403 # ifscript_down if
 404 #       Evaluate a shutdown script for the $if interface.
 405 #       It returns 0 if a script was found and processed or
 406 #       1 if no script was found.
 407 #
 408 ifscript_down()
 409 {
 410         if [ -r /etc/stop_if.$1 ]; then
 411                 . /etc/stop_if.$1
 412                 return 0
 413         fi
 414         return 1
 415 }
 416
 417 # wlan_get_unused
 418 # walk through net.wlan and find unused device that can be created
 419 #
 420 wlan_get_unused()
 421 {
 422         local idx
 423
 424         idx=0
 425
 426         while : ; do
 427                 if ! ${SYSCTL_N} -q net.wlan.${idx}.%parent >/dev/null; then
 428                         echo "wlan${idx}"
 429                         break
 430                 fi
 431                 idx=$((${idx} + 1))
 432         done
 433 }
 434
 435 # wlan_is_parent
 436 # check if given interface is parent for any existing wlan device
 437 #
 438 wlan_is_parent()
 439 {
 440         sysctl -q net.wlan | grep -q "%parent: ${1}"
 441 }
 442
 443 # wlan_up
 444 #       Create IEEE 802.11 interfaces.
 445 #
 446 wlan_up()
 447 {
 448         local _prefix _list parent child child_wlans create_args debug_flags
 449         _prefix=
 450         _list=
 451
 452         local _rcconf _auto
 453         _rcconf=""
 454         _auto=""
 455
 456         local wlan_devices
 457         if [ -n "$1" ]; then
 458                 wlan_devices="$1"
 459         else
 460                 wlan_devices="`${SYSCTL_N} -q net.wlan.devices`"
 461         fi
 462
 463         # Order detected devices so that interfaces configured via rc.conf are
 464         # created first, and then all other devices are automatically assigned
 465         for parent in ${wlan_devices}; do
 466                 child_wlans=`get_if_var $parent wlans_IF`
 467                 if [ -n "${child_wlans}" ]; then
 468                         _rcconf="${_rcconf} ${parent}"
 469                 else
 470                         _auto="${_auto} ${parent}"
 471                 fi
 472         done
 473
 474         for parent in ${_rcconf} ${_auto}; do
 475                 if wlan_is_parent $parent; then
 476                         continue
 477                 fi
 478                 # Parse wlans_$parent="$child ..."
 479                 child_wlans=`get_if_var $parent wlans_IF`
 480                 # Or find first unused wlan device to create
 481                 if [ -z "${child_wlans}" ]; then
 482                         child_wlans=`wlan_get_unused`
 483                 fi
 484                 for child in ${child_wlans}; do
 485                         if ifexists $child; then
 486                                 continue
 487                         fi
 488
 489                         create_args="wlandev $parent `get_if_var $child create_args_IF`"
 490                         debug_flags="`get_if_var $child wlandebug_IF`"
 491                         if expr $child : 'wlan[0-9][0-9]*$' >/dev/null 2>&1; then
 492                                 ifconfig $child create ${create_args}
 493                         else
 494                                 ifconfig wlan create ${create_args} name $child
 495                         fi
 496                         if [ $? -eq 0 ]; then
 497                                 _list="${_list}${_prefix}${child}"
 498                                 [ -z "$_prefix" ] && _prefix=' '
 499                         fi
 500                         if [ -n "${debug_flags}" ]; then
 501                                 wlandebug -i $child ${debug_flags}
 502                         fi
 503                 done
 504         done
 505
 506         if [ -n "${_list}" ]; then
 507                 echo "Created wlan interfaces: ${_list}"
 508         fi
 509         debug "Created wlan interfaces: ${_list}"
 510 }
 511
 512 # wlan_down
 513 #       Destroy IEEE 802.11 interfaces.
 514 #
 515 wlan_down()
 516 {
 517         local _prefix _list parent child child_wlans
 518         _prefix=
 519         _list=
 520
 521         local wlan_devices
 522         if [ -n "$1" ]; then
 523                 wlan_devices="$1"
 524         else
 525                 wlan_devices="`${SYSCTL_N} -q net.wlan.devices`"
 526         fi
 527
 528         for parent in ${wlan_devices}; do
 529                 child_wlans=`get_if_var $parent wlans_IF`
 530                 for child in ${child_wlans}; do
 531                         if ! ifexists $child; then
 532                                 continue
 533                         fi
 534
 535                         ifconfig -n $child destroy
 536                         if [ $? -eq 0 ]; then
 537                                 _list="${_list}${_prefix}${child}"
 538                                 [ -z "$_prefix" ] && _prefix=' '
 539                         fi
 540                 done
 541         done
 542
 543         if [ -n "${_list}" ]; then
 544                 echo "Destroyed wlan interfaces: ${_list}"
 545         fi
 546         debug "Destroyed wlan interfaces: ${_list}"
 547 }
 548
 549 # clone_up
 550 #       Create cloneable interfaces.
 551 #
 552 clone_up()
 553 {
 554         local _prefix _list ifn
 555         _prefix=
 556         _list=
 557
 558         for ifn in ${cloned_interfaces}; do
 559                 ifconfig ${ifn} create
 560                 if [ $? -eq 0 ]; then
 561                         _list="${_list}${_prefix}${ifn}"
 562                         [ -z "$_prefix" ] && _prefix=' '
 563                 fi
 564         done
 565         if [ -n "${_list}" ]; then
 566                 echo "Created clone interfaces: ${_list}"
 567         fi
 568         debug "Created clone interfaces: ${_list}"
 569 }
 570
 571 # clone_down
 572 #       Destroy cloned interfaces.
 573 #
 574 clone_down()
 575 {
 576         local _prefix _list ifn
 577         _prefix=
 578         _list=
 579
 580         for ifn in ${cloned_interfaces}; do
 581                 ifconfig ${ifn} destroy
 582                 if [ $? -eq 0 ]; then
 583                         _list="${_list}${_prefix}${ifn}"
 584                         [ -z "$_prefix" ] && _prefix=' '
 585                 fi
 586         done
 587         if [ -n "${_list}" ]; then
 588                 echo "Destroyed clone interfaces: ${_list}"
 589         fi
 590         debug "Destroyed clone interfaces: ${_list}"
 591 }
 592
 593 # gif_up
 594 #       Create IPv6<-->IPv4 tunnels
 595 #
 596 gif_up() {
 597         local _if _peers
 598
 599         case ${gif_interfaces} in
 600         [Nn][Oo] | '')
 601                 return
 602                 ;;
 603         esac
 604
 605         for _if in ${gif_interfaces}; do
 606                 eval _peers=\$gifconfig_${_if}
 607                 case ${_peers} in
 608                 '')
 609                         continue
 610                         ;;
 611                 *)
 612                         ifconfig $_if create >/dev/null 2>&1
 613                         ifconfig $_if tunnel ${_peers}
 614                         ifconfig $_if up
 615                         ;;
 616                 esac
 617         done
 618 }
 619
 620 # ifnet_rename
 621 #       Rename all requested interfaces.
 622 #
 623 ifnet_rename()
 624 {
 625         local _ifn_list _if _ifname
 626
 627         _ifn_list=$(ifconfig -l)
 628         [ -z "$_ifn_list" ] && return 0
 629
 630         for _if in ${_ifn_list} ; do
 631                 _ifname=`get_if_var $_if ifconfig_IF_name`
 632                 if [ -n "$_ifname" ]; then
 633                         ifconfig $_if name $_ifname
 634                 fi
 635         done
 636         return 0
 637 }
 638
 639 # list_net_interfaces
 640 #       List all network interfaces.
 641 #       Note that the list will include cloned interfaces if applicable.
 642 #       Cloned interfaces must already exist to have a chance to appear
 643 #       in the list if ${network_interfaces} is set to `auto'.
 644 #
 645 list_net_interfaces()
 646 {
 647         local _tmplist _autolist _lo _if
 648
 649         case ${network_interfaces} in
 650         [Aa][Uu][Tt][Oo])
 651                 _autolist=$(ifconfig -l)
 652                 _lo=
 653                 for _if in ${_autolist} ; do
 654                         if [ "$_if" = "lo0" ]; then
 655                                 _lo="lo0"
 656                         else
 657                                 _tmplist="${_tmplist} ${_if}"
 658                         fi
 659                 done
 660                 _tmplist="${_lo} ${_tmplist}"
 661                 ;;
 662         *)
 663                 _tmplist="${network_interfaces} ${cloned_interfaces}"
 664                 ;;
 665         esac
 666
 667         echo $_tmplist
 668 }
 669
 670 hexdigit()
 671 {
 672         if [ $1 -lt 10 ]; then
 673                 echo $1
 674         else
 675                 case $1 in
 676                 10)     echo a ;;
 677                 11)     echo b ;;
 678                 12)     echo c ;;
 679                 13)     echo d ;;
 680                 14)     echo e ;;
 681                 15)     echo f ;;
 682                 esac
 683         fi
 684 }
 685
 686 hexprint()
 687 {
 688         local val str dig
 689         val=$1
 690         str=''
 691
 692         dig=`hexdigit $((${val} & 15))`
 693         str=${dig}${str}
 694         val=$((${val} >> 4))
 695         while [ ${val} -gt 0 ]; do
 696                 dig=`hexdigit $((${val} & 15))`
 697                 str=${dig}${str}
 698                 val=$((${val} >> 4))
 699         done
 700
 701         echo ${str}
 702 }
 703
 704 is_wired_interface()
 705 {
 706         local media
 707
 708         case `ifconfig $1 2>/dev/null` in
 709                 *media:?Ethernet*) media=Ethernet ;;
 710         esac
 711
 712         test "$media" = "Ethernet"
 713 }
 714
 715 #
 716 # IPv6-specific setup subroutines
 717 #
 718
 719 # Setup the interfaces for IPv6
 720 network6_interface_setup()
 721 {
 722         local interfaces rtsol_interfaces ipv6_ifconfig
 723         local rtsol_available rtsol_interface
 724         local prefix laddr hostid address
 725         local _if j
 726
 727         interfaces=$*
 728         rtsol_interfaces=''
 729         case ${ipv6_gateway_enable} in
 730         [Yy][Ee][Ss])
 731                 rtsol_available=no
 732                 ;;
 733         *)
 734                 rtsol_available=yes
 735                 ;;
 736         esac
 737         for _if in $interfaces; do
 738                 rtsol_interface=yes
 739                 prefix=`get_if_var $_if ipv6_prefix_IF`
 740                 if [ -n "${prefix}" ]; then
 741                         rtsol_available=no
 742                         rtsol_interface=no
 743                         laddr=`network6_getladdr $_if`
 744                         hostid=`expr "${laddr}" : 'fe80::\(.*\)%\(.*\)'`
 745                         for j in ${prefix}; do
 746                                 address=$j\:${hostid}
 747                                 ifconfig $_if inet6 ${address} prefixlen 64 alias
 748
 749                                 case ${ipv6_gateway_enable} in
 750                                 [Yy][Ee][Ss])
 751                                         # subnet-router anycast address
 752                                         # (rfc2373)
 753                                         ifconfig $_if inet6 $j:: prefixlen 64 \
 754                                                 alias anycast
 755                                         ;;
 756                                 esac
 757                         done
 758                 fi
 759                 ipv6_ifconfig=`ifconfig_getargs $_if ipv6`
 760                 ipv6_ifconfig="${ipv6_ifconfig#inet6 }"
 761                 if [ -n "${ipv6_ifconfig}" ]; then
 762                         rtsol_available=no
 763                         rtsol_interface=no
 764                         ifconfig $_if inet6 ${ipv6_ifconfig} alias
 765                 fi
 766
 767                 if [ "${rtsol_available}" = "yes" -a \
 768                      "${rtsol_interface}" = "yes" ]; then
 769                         case ${i} in
 770                         lo0|gif[0-9]*|stf[0-9]*|lp[0-9]*|sl[0-9]*|tun[0-9]*)
 771                                 ;;
 772                         *)
 773                                 rtsol_interfaces="${rtsol_interfaces} ${_if}"
 774                                 ;;
 775                         esac
 776                 else
 777                         ifconfig $_if inet6
 778                 fi
 779         done
 780
 781         if [ "${rtsol_available}" = "yes" -a -n "${rtsol_interfaces}" ]; then
 782                 # Act as endhost - automatically configured.
 783                 # You can configure only single interface, as
 784                 # specification assumes that autoconfigured host has
 785                 # single interface only.
 786                 ${SYSCTL_W} net.inet6.ip6.accept_rtadv=1
 787                 set ${rtsol_interfaces}
 788                 ifconfig $1 up
 789                 echo "Auto configuring interface $1 ..."
 790                 rtsol $1
 791         fi
 792
 793         for _if in $interfaces; do
 794                 ifalias_up $_if ipv6
 795         done
 796 }
 797
 798 # Setup IPv6 to IPv4 mapping
 799 network6_stf_setup()
 800 {
 801         local stf_prefixlen stf_interface_ipv6_ifid
 802         local hexfrag1 hexfrag2 ipv4_in_hexformat laddr
 803         local _if OIFS
 804
 805         case ${stf_interface_ipv4addr} in
 806         [Nn][Oo] | '')
 807                 ;;
 808         *)
 809                 # assign IPv6 addr and interface route for 6to4 interface
 810                 stf_prefixlen=$((16+${stf_interface_ipv4plen:-0}))
 811                 OIFS="$IFS"
 812                 IFS=".$IFS"
 813                 set ${stf_interface_ipv4addr}
 814                 IFS="$OIFS"
 815                 hexfrag1=`hexprint $(($1*256 + $2))`
 816                 hexfrag2=`hexprint $(($3*256 + $4))`
 817                 ipv4_in_hexformat="${hexfrag1}:${hexfrag2}"
 818                 case ${stf_interface_ipv6_ifid} in
 819                 [Aa][Uu][Tt][Oo] | '')
 820                         for _if in ${ipv6_network_interfaces}; do
 821                                 laddr=`network6_getladdr $_if`
 822                                 case ${laddr} in
 823                                 '')
 824                                         ;;
 825                                 *)
 826                                         break
 827                                         ;;
 828                                 esac
 829                         done
 830                         stf_interface_ipv6_ifid=`expr "${laddr}" : \
 831                                                       'fe80::\(.*\)%\(.*\)'`
 832                         case ${stf_interface_ipv6_ifid} in
 833                         '')
 834                                 stf_interface_ipv6_ifid=0:0:0:1
 835                                 ;;
 836                         esac
 837                         ;;
 838                 esac
 839                 ifconfig stf0 create >/dev/null 2>&1
 840                 ifconfig stf0 inet6 2002:${ipv4_in_hexformat}:${stf_interface_ipv6_slaid:-0}:${stf_interface_ipv6_ifid} \
 841                         prefixlen ${stf_prefixlen}
 842                 # disallow packets to malicious 6to4 prefix
 843                 route add -inet6 2002:e000:: -prefixlen 20 ::1 -reject
 844                 route add -inet6 2002:7f00:: -prefixlen 24 ::1 -reject
 845                 route add -inet6 2002:0000:: -prefixlen 24 ::1 -reject
 846                 route add -inet6 2002:ff00:: -prefixlen 24 ::1 -reject
 847                 ;;
 848         esac
 849 }
 850
 851 # Setup static routes
 852 network6_static_routes_setup()
 853 {
 854         local _rt
 855
 856         # Set up any static routes.
 857         case ${ipv6_defaultrouter} in
 858         [Nn][Oo] | '')
 859                 ;;
 860         *)
 861                 ipv6_static_routes="default ${ipv6_static_routes}"
 862                 ipv6_route_default="default ${ipv6_defaultrouter}"
 863                 ;;
 864         esac
 865         case ${ipv6_static_routes} in
 866         [Nn][Oo] | '')
 867                 ;;
 868         *)
 869                 for _rt in ${ipv6_static_routes}; do
 870                         eval ipv6_route_args=\$ipv6_route_${_rt}
 871                         route add -inet6 ${ipv6_route_args}
 872                 done
 873                 ;;
 874         esac
 875 }
 876
 877 # Install the "default interface" to kernel, which will be used
 878 # as the default route when there's no router.
 879 network6_default_interface_setup()
 880 {
 881         local _if laddr
 882
 883         # Choose IPv6 default interface if it is not clearly specified.
 884         case ${ipv6_default_interface} in
 885         '')
 886                 for _if in ${ipv6_network_interfaces}; do
 887                         if [ "${_if}" = "lo0" ]; then
 888                                 continue
 889                         fi
 890
 891                         laddr=`network6_getladdr $_if exclude_tentative`
 892                         case ${laddr} in
 893                         '')
 894                                 ;;
 895                         *)
 896                                 ipv6_default_interface=$_if
 897                                 break
 898                                 ;;
 899                         esac
 900                 done
 901                 ;;
 902         esac
 903
 904         # Disallow unicast packets without outgoing scope identifiers,
 905         # or route such packets to a "default" interface, if it is specified.
 906         route add -inet6 fe80:: -prefixlen 10 ::1 -reject
 907         case ${ipv6_default_interface} in
 908         [Nn][Oo] | '')
 909                 route add -inet6 ff02:: -prefixlen 16 ::1 -reject
 910                 ;;
 911         *)
 912                 laddr=`network6_getladdr ${ipv6_default_interface}`
 913                 route add -inet6 ff02:: ${laddr} -prefixlen 16 -interface \
 914                         -cloning
 915
 916                 # Disable installing the default interface with the
 917                 # case net.inet6.ip6.forwarding=0 and
 918                 # net.inet6.ip6.accept_rtadv=0, due to avoid conflict
 919                 # between the default router list and the manual
 920                 # configured default route.
 921                 case ${ipv6_gateway_enable} in
 922                 [Yy][Ee][Ss])
 923                         ;;
 924                 *)
 925                         if [ `${SYSCTL_N} net.inet6.ip6.accept_rtadv` -eq 1 ]
 926                         then
 927                                 ndp -I ${ipv6_default_interface}
 928                         fi
 929                         ;;
 930                 esac
 931                 ;;
 932         esac
 933 }
 934
 935 network6_getladdr()
 936 {
 937         local proto addr rest
 938
 939         ifconfig $1 2>/dev/null | while read proto addr rest; do
 940                 case ${proto} in
 941                 inet6)
 942                         case ${addr} in
 943                         fe80::*)
 944                                 if [ -z "$2" ]; then
 945                                         echo ${addr}
 946                                         return
 947                                 fi
 948                                 case ${rest} in
 949                                 *tentative*)
 950                                         continue
 951                                         ;;
 952                                 *)
 953                                         echo ${addr}
 954                                         return
 955                                 esac
 956                         esac
 957                 esac
 958         done
 959 }