mkinitrd - add tool and infrastructure for initrd
[dragonfly.git] / 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 # $DragonFly: src/etc/network.subr,v 1.7 2008/03/15 10:13:37 hasso Exp $
27 #
28
29 #
30 # Subroutines commonly used from network startup scripts.
31 # Requires that rc.conf be loaded first.
32 #
33
34 # ifconfig_up if
35 #       Evaluate ifconfig(8) arguments for interface $if and
36 #       run ifconfig(8) with those arguments. It returns 0 if
37 #       arguments were found and executed or 1 if the interface
38 #       had no arguments.  Pseudo arguments DHCP and WPA are handled
39 #       here.
40 #
41 ifconfig_up()
42 {
43         _cfg=1
44
45         ifconfig_args=`ifconfig_getargs $1`
46         if [ -n "${ifconfig_args}" ]; then
47                 ifconfig $1 ${ifconfig_args}
48                 _cfg=0
49         fi
50
51         if wpaif $1; then
52                 /etc/rc.d/wpa_supplicant start $1
53                 _cfg=0          # XXX: not sure this should count
54         fi
55
56         if dhcpif $1; then
57                 /etc/rc.d/dhclient start $1
58                 _cfg=0
59         fi
60
61         return $_cfg
62 }
63
64 # ifconfig_down if
65 #       Remove all inet entries from the $if interface. It returns
66 #       0 if inet entries were found and removed. It returns 1 if
67 #       no entries were found or they could not be removed.
68 #
69 ifconfig_down()
70 {
71         [ -z "$1" ] && return 1
72         _ifs="^"
73         _cfg=1
74
75         inetList="`ifconfig $1 | grep 'inet ' | tr "\n" "$_ifs"`"
76
77         oldifs="$IFS"
78         IFS="$_ifs"
79         for _inet in $inetList ; do
80                 # get rid of extraneous line
81                 [ -z "$_inet" ] && break
82
83                 _inet=`expr "$_inet" : '.*\(inet \([0-9]\{1,3\}\.\)\{3\}[0-9]\{1,3\}\).*'`
84
85                 IFS="$oldifs"
86                 ifconfig $1 ${_inet} delete
87                 IFS="$_ifs"
88                 _cfg=0
89         done
90         IFS="$oldifs"
91
92         if wpaif $1; then
93                 /etc/rc.d/wpa_supplicant stop $1
94         fi
95
96         if dhcpif $1; then
97                 /etc/rc.d/dhclient stop $1
98                 _cfg=0
99         fi
100
101         return $_cfg
102 }
103
104 # _ifconfig_getargs if
105 #       Echos the arguments for the supplied interface to stdout.
106 #       returns 1 if empty.  In general, ifconfig_getargs should be used
107 #       outside this file.
108 _ifconfig_getargs()
109 {
110         _ifn=$1
111         if [ -z "$_ifn" ]; then
112                 return 1
113         fi
114
115         eval _args=\$ifconfig_$1
116         if [ -z "$_args" -a -n "${pccard_ifconfig}" ]; then
117                 for _if in ${removable_interfaces} ; do
118                         if [ "$_if" = "$_ifn" ] ; then
119                                 _args=${pccard_ifconfig}
120                                 break
121                         fi
122                 done
123         fi
124
125         echo $_args
126 }
127
128 # ifconfig_getargs if
129 #       Takes the result from _ifconfig_getargs and removes pseudo
130 #       args such as DHCP and WPA.
131 ifconfig_getargs()
132 {
133         _tmpargs=`_ifconfig_getargs $1`
134         if [ $? -eq 1 ]; then
135                 return 1
136         fi
137         _args=
138
139         is_optarg=no
140         for _arg in $_tmpargs; do
141                 if [ "$is_optarg" = "no" ]; then
142                         case $_arg in
143                         [Dd][Hh][Cc][Pp])
144                                 ;;
145                         [Ww][Pp][Aa])
146                                 ;;
147                         *)
148                                 _args="$_args $_arg"
149                                 case $_arg in
150                                 authmode)
151                                         is_optarg=yes
152                                         ;;
153                                 esac
154                                 ;;
155                         esac
156                 else
157                         _args="$_args $_arg"
158                         is_optarg=no
159                 fi
160         done
161
162         echo $_args
163 }
164
165 # dhcpif if
166 #       Returns 0 if the interface is a DHCP interface and 1 otherwise.
167 dhcpif()
168 {
169         _tmpargs=`_ifconfig_getargs $1`
170         for _arg in $_tmpargs; do
171                 case $_arg in
172                 [Dd][Hh][Cc][Pp])
173                         return 0
174                         ;;
175                 esac
176         done
177         return 1
178 }
179
180 # wpaif if
181 #       Returns 0 if the interface is a WPA interface and 1 otherwise.
182 wpaif()
183 {
184         _tmpargs=`_ifconfig_getargs $1`
185         is_optarg=no
186         for _arg in $_tmpargs; do
187                 if [ "$is_optarg" = "no" ]; then
188                         case $_arg in
189                         [Ww][Pp][Aa])
190                                 return 0
191                                 ;;
192                         authmode)
193                                 is_optarg=yes
194                                 ;;
195                         esac
196                 else
197                         is_optarg=no
198                 fi
199         done
200         return 1
201 }
202
203 # ifalias_up if
204 #       Configure aliases for network interface $if.
205 #       It returns 0 if at least one alias was configured or
206 #       1 if there were none.
207 #
208 ifalias_up()
209 {
210         _ret=1
211         alias=0
212         while : ; do
213                 eval ifconfig_args=\$ifconfig_$1_alias${alias}
214                 if [ -n "${ifconfig_args}" ]; then
215                         ifconfig $1 ${ifconfig_args} alias
216                         alias=$((${alias} + 1))
217                         _ret=0
218                 else
219                         break
220                 fi
221         done
222         return $_ret
223 }
224
225 #ifalias_down if
226 #       Remove aliases for network interface $if.
227 #       It returns 0 if at least one alias was removed or
228 #       1 if there were none.
229 #
230 ifalias_down()
231 {
232         _ret=1
233         alias=0
234         while : ; do
235                 eval ifconfig_args=\$ifconfig_$1_alias${alias}
236                 if [ -n "${ifconfig_args}" ]; then
237                         ifconfig $1 ${ifconfig_args} -alias
238                         alias=$((${alias} + 1))
239                         _ret=0
240                 else
241                         break
242                 fi
243         done
244         return $_ret
245 }
246
247 # ifscript_up if
248 #       Evaluate a startup script for the $if interface.
249 #       It returns 0 if a script was found and processed or
250 #       1 if no script was found.
251 #
252 ifscript_up()
253 {
254         if [ -r /etc/start_if.$1 ]; then
255                 . /etc/start_if.$1
256                 return 0
257         fi
258         return 1
259 }
260
261 # ifscript_down if
262 #       Evaluate a shutdown script for the $if interface.
263 #       It returns 0 if a script was found and processed or
264 #       1 if no script was found.
265 #
266 ifscript_down()
267 {
268         if [ -r /etc/stop_if.$1 ]; then
269                 . /etc/stop_if.$1
270                 return 0
271         fi
272         return 1
273 }
274
275 # Create cloneable interfaces.
276 #
277 clone_up()
278 {
279         _prefix=
280         _list=
281         for ifn in ${cloned_interfaces}; do
282                 ifconfig ${ifn} create
283                 if [ $? -eq 0 ]; then
284                         _list="${_list}${_prefix}${ifn}"
285                         [ -z "$_prefix" ] && _prefix=' '
286                 fi
287         done
288         debug "Cloned: ${_list}"
289 }
290
291 # Destroy cloned interfaces. Destroyed interfaces are echoed
292 # to standard output.
293 #
294 clone_down()
295 {
296         _prefix=
297         _list=
298         for ifn in ${cloned_interfaces}; do
299                 ifconfig ${ifn} destroy
300                 if [ $? -eq 0 ]; then
301                         _list="${_list}${_prefix}${ifn}"
302                         [ -z "$_prefix" ] && _prefix=' '
303                 fi
304         done
305         debug "Destroyed clones: ${_list}"
306 }
307
308 gif_up() {
309         case ${gif_interfaces} in
310         [Nn][Oo] | '')
311                 ;;
312         *)
313                 for i in ${gif_interfaces}; do
314                         eval peers=\$gifconfig_$i
315                         case ${peers} in
316                         '')
317                                 continue
318                                 ;;
319                         *)
320                                 ifconfig $i create >/dev/null 2>&1
321                                 ifconfig $i tunnel ${peers}
322                                 ifconfig $i up
323                                 ;;
324                         esac
325                 done
326                 ;;
327         esac
328 }
329
330 #
331 # ipx_up ifn
332 # Configure any IPX addresses for interface $ifn. Returns 0 if IPX
333 # arguments were found and configured; returns 1 otherwise.
334 #
335 ipx_up()
336 {
337         ifn="$1"
338         eval ifconfig_args=\$ifconfig_${ifn}_ipx
339         if [ -n "${ifconfig_args}" ]; then
340                 ifconfig ${ifn} ${ifconfig_args}
341                 return 0
342         fi
343         return 1
344 }
345
346 # ipx_down ifn
347 #       Remove IPX addresses for interface $ifn. Returns 0 if IPX
348 #       addresses were found and unconfigured. It returns 1, otherwise.
349 #
350 ipx_down()
351 {
352         [ -z "$1" ] && return 1
353         _ifs="^"
354         _ret=1
355
356         ipxList="`ifconfig $1 | grep 'ipx ' | tr "\n" "$_ifs"`"
357
358         oldifs="$IFS"
359         IFS="$_ifs"
360         for _ipx in $ipxList ; do
361                 # get rid of extraneous line
362                 [ -z "$_ipx" ] && break
363
364                 _ipx=`expr "$_ipx" : '.*\(ipx [0-9a-h]\{1,8\}H*\.[0-9a-h]\{1,12\}\).*'`
365
366                 IFS="$oldifs"
367                 ifconfig $1 ${_ipx} delete
368                 IFS="$_ifs"
369                 _ret=0
370         done
371         IFS="$oldifs"
372
373         return $_ret
374 }
375
376 # ifnet_rename
377 #       Rename all requested interfaces.
378 #
379 ifnet_rename()
380 {
381
382         _ifn_list="`ifconfig -l`"
383         [ -z "$_ifn_list" ] && return 0
384         for _if in ${_ifn_list} ; do
385                 eval _ifname=\$ifconfig_${_if}_name
386                 if [ ! -z "$_ifname" ]; then
387                         ifconfig $_if name $_ifname
388                 fi
389         done
390         return 0
391 }
392
393 #
394 # list_net_interfaces type
395 #       List all network interfaces. The type of interface returned
396 #       can be controlled by the type argument. The type
397 #       argument can be any of the following:
398 #               nodhcp - all interfaces, excluding DHCP configured interfaces
399 #               dhcp   - list only DHCP configured interfaces
400 #       If no argument is specified all network interfaces are output.
401 #       Note that the list will include cloned interfaces if applicable.
402 #       Cloned interfaces must already exist to have a chance to appear
403 #       in the list if ${network_interfaces} is set to `auto'.
404 #
405 list_net_interfaces()
406 {
407         type=$1
408
409         # Get a list of ALL the interfaces.  NOTE: cloned interfaces
410         # have already been configured so they should show up in the
411         # ifconfig -l output.
412         #
413         case ${network_interfaces} in
414         [Aa][Uu][Tt][Oo])
415                 _autolist="`ifconfig -l`"
416                 _lo=
417                 for _if in ${_autolist} ; do
418                         if [ "$_if" = "lo0" ]; then
419                                 _lo="lo0"
420                         else
421                                 _tmplist="${_tmplist} ${_if}"
422                         fi
423                 done
424                 _tmplist="${_lo} ${_tmplist}"
425                 ;;
426         *)
427                 _tmplist="${network_interfaces} ${cloned_interfaces}"
428                 ;;
429         esac
430
431         if [ -z "$type" ]; then
432                 echo $_tmplist
433                 return 0
434         fi
435
436         # Separate out dhcp and non-dhcp interfaces
437         #
438         _aprefix=
439         _bprefix=
440         for _if in ${_tmplist} ; do
441                 eval _ifarg="\$ifconfig_${_if}"
442                 case "$_ifarg" in
443                 [Dd][Hh][Cc][Pp])
444                         _dhcplist="${_dhcplist}${_aprefix}${_if}"
445                         [ -z "$_aprefix" ] && _aprefix=' '
446                         ;;
447                 ''|*)
448                         _nodhcplist="${_nodhcplist}${_bprefix}${_if}"
449                         [ -z "$_bprefix" ] && _bprefix=' '
450                         ;;
451                 esac
452         done
453
454         case "$type" in
455         nodhcp)
456                 echo $_nodhcplist
457                 ;;
458         dhcp)
459                 echo $_dhcplist
460                 ;;
461         esac
462         return 0
463 }
464
465 hexdigit()
466 {
467         if [ $1 -lt 10 ]; then
468                 echo $1
469         else
470                 case $1 in
471                 10)     echo a ;;
472                 11)     echo b ;;
473                 12)     echo c ;;
474                 13)     echo d ;;
475                 14)     echo e ;;
476                 15)     echo f ;;
477                 esac
478         fi
479 }
480
481 hexprint()
482 {
483         val=$1
484         str=''
485
486         dig=`hexdigit $((${val} & 15))`
487         str=${dig}${str}
488         val=$((${val} >> 4))
489         while [ ${val} -gt 0 ]; do
490                 dig=`hexdigit $((${val} & 15))`
491                 str=${dig}${str}
492                 val=$((${val} >> 4))
493         done
494
495         echo ${str}
496 }
497
498 # Setup the interfaces for IPv6
499 network6_interface_setup()
500 {
501         interfaces=$*
502         rtsol_interfaces=''
503         case ${ipv6_gateway_enable} in
504         [Yy][Ee][Ss])
505                 rtsol_available=no
506                 ;;
507         *)
508                 rtsol_available=yes
509                 ;;
510         esac
511         for i in $interfaces; do
512                 rtsol_interface=yes
513                 eval prefix=\$ipv6_prefix_$i
514                 if [ -n "${prefix}" ]; then
515                         rtsol_available=no
516                         rtsol_interface=no
517                         laddr=`network6_getladdr $i`
518                         hostid=`expr "${laddr}" : 'fe80::\(.*\)%\(.*\)'`
519                         for j in ${prefix}; do
520                                 address=$j\:${hostid}
521                                 ifconfig $i inet6 ${address} prefixlen 64 alias
522
523                                 case ${ipv6_gateway_enable} in
524                                 [Yy][Ee][Ss])
525                                         # subnet-router anycast address
526                                         # (rfc2373)
527                                         ifconfig $i inet6 $j:: prefixlen 64 \
528                                                 alias anycast
529                                         ;;
530                                 esac
531                         done
532                 fi
533                 eval ipv6_ifconfig=\$ipv6_ifconfig_$i
534                 if [ -n "${ipv6_ifconfig}" ]; then
535                         rtsol_available=no
536                         rtsol_interface=no
537                         ifconfig $i inet6 ${ipv6_ifconfig} alias
538                 fi
539
540                 if [ ${rtsol_available} = yes -a ${rtsol_interface} = yes ]
541                 then
542                         case ${i} in
543                         lo0|gif[0-9]*|stf[0-9]*|faith[0-9]*|lp[0-9]*|sl[0-9]*|tun[0-9]*)
544                                 ;;
545                         *)
546                                 rtsol_interfaces="${rtsol_interfaces} ${i}"
547                                 ;;
548                         esac
549                 else
550                         ifconfig $i inet6
551                 fi
552         done
553
554         if [ ${rtsol_available} = yes -a -n "${rtsol_interfaces}" ]; then
555                 # Act as endhost - automatically configured.
556                 # You can configure only single interface, as
557                 # specification assumes that autoconfigured host has
558                 # single interface only.
559                 sysctl net.inet6.ip6.accept_rtadv=1
560                 set ${rtsol_interfaces}
561                 ifconfig $1 up
562                 rtsol $1
563         fi
564
565         for i in $interfaces; do
566                 alias=0
567                 while : ; do
568                         eval ipv6_ifconfig=\$ipv6_ifconfig_${i}_alias${alias}
569                         if [ -z "${ipv6_ifconfig}" ]; then
570                                 break;
571                         fi
572                         ifconfig $i inet6 ${ipv6_ifconfig} alias
573                         alias=$((${alias} + 1))
574                 done
575         done
576 }
577
578 # Setup IPv6 to IPv4 mapping
579 network6_stf_setup()
580 {
581         case ${stf_interface_ipv4addr} in
582         [Nn][Oo] | '')
583                 ;;
584         *)
585                 # assign IPv6 addr and interface route for 6to4 interface
586                 stf_prefixlen=$((16+${stf_interface_ipv4plen:-0}))
587                 OIFS="$IFS"
588                 IFS=".$IFS"
589                 set ${stf_interface_ipv4addr}
590                 IFS="$OIFS"
591                 hexfrag1=`hexprint $(($1*256 + $2))`
592                 hexfrag2=`hexprint $(($3*256 + $4))`
593                 ipv4_in_hexformat="${hexfrag1}:${hexfrag2}"
594                 case ${stf_interface_ipv6_ifid} in
595                 [Aa][Uu][Tt][Oo] | '')
596                         for i in ${ipv6_network_interfaces}; do
597                                 laddr=`network6_getladdr ${i}`
598                                 case ${laddr} in
599                                 '')
600                                         ;;
601                                 *)
602                                         break
603                                         ;;
604                                 esac
605                         done
606                         stf_interface_ipv6_ifid=`expr "${laddr}" : \
607                                                       'fe80::\(.*\)%\(.*\)'`
608                         case ${stf_interface_ipv6_ifid} in
609                         '')
610                                 stf_interface_ipv6_ifid=0:0:0:1
611                                 ;;
612                         esac
613                         ;;
614                 esac
615                 ifconfig stf0 create >/dev/null 2>&1
616                 ifconfig stf0 inet6 2002:${ipv4_in_hexformat}:${stf_interface_ipv6_slaid:-0}:${stf_interface_ipv6_ifid} \
617                         prefixlen ${stf_prefixlen}
618                 # disallow packets to malicious 6to4 prefix
619                 route add -inet6 2002:e000:: -prefixlen 20 ::1 -reject
620                 route add -inet6 2002:7f00:: -prefixlen 24 ::1 -reject
621                 route add -inet6 2002:0000:: -prefixlen 24 ::1 -reject
622                 route add -inet6 2002:ff00:: -prefixlen 24 ::1 -reject
623                 ;;
624         esac
625 }
626
627 # Setup static routes
628 network6_static_routes_setup()
629 {
630         # Set up any static routes.
631         case ${ipv6_defaultrouter} in
632         [Nn][Oo] | '')
633                 ;;
634         *)
635                 ipv6_static_routes="default ${ipv6_static_routes}"
636                 ipv6_route_default="default ${ipv6_defaultrouter}"
637                 ;;
638         esac
639         case ${ipv6_static_routes} in
640         [Nn][Oo] | '')
641                 ;;
642         *)
643                 for i in ${ipv6_static_routes}; do
644                         eval ipv6_route_args=\$ipv6_route_${i}
645                         route add -inet6 ${ipv6_route_args}
646                 done
647                 ;;
648         esac
649 }
650
651 # Setup faith
652 network6_faith_setup()
653 {
654         case ${ipv6_faith_prefix} in
655         [Nn][Oo] | '')
656                 ;;
657         *)
658                 sysctl net.inet6.ip6.keepfaith=1
659                 ifconfig faith0 create >/dev/null 2>&1
660                 ifconfig faith0 up
661                 for prefix in ${ipv6_faith_prefix}; do
662                         prefixlen=`expr "${prefix}" : ".*/\(.*\)"`
663                         case ${prefixlen} in
664                         '')
665                                 prefixlen=96
666                                 ;;
667                         *)
668                                 prefix=`expr "${prefix}" : \
669                                              "\(.*\)/${prefixlen}"`
670                                 ;;
671                         esac
672                         route add -inet6 ${prefix} -prefixlen ${prefixlen} ::1
673                         route change -inet6 ${prefix} -prefixlen ${prefixlen} \
674                                 -ifp faith0
675                 done
676                 ;;
677         esac
678 }
679
680 # Install the "default interface" to kernel, which will be used
681 # as the default route when there's no router.
682 network6_default_interface_setup()
683 {
684         # Choose IPv6 default interface if it is not clearly specified.
685         case ${ipv6_default_interface} in
686         '')
687                 for i in ${ipv6_network_interfaces}; do
688                         case $i in
689                         lo0|faith[0-9]*)
690                                 continue
691                                 ;;
692                         esac
693                         laddr=`network6_getladdr $i exclude_tentative`
694                         case ${laddr} in
695                         '')
696                                 ;;
697                         *)
698                                 ipv6_default_interface=$i
699                                 break
700                                 ;;
701                         esac
702                 done
703                 ;;
704         esac
705
706         # Disallow unicast packets without outgoing scope identifiers,
707         # or route such packets to a "default" interface, if it is specified.
708         route add -inet6 fe80:: -prefixlen 10 ::1 -reject
709         case ${ipv6_default_interface} in
710         [Nn][Oo] | '')
711                 route add -inet6 ff02:: -prefixlen 16 ::1 -reject
712                 ;;
713         *)
714                 laddr=`network6_getladdr ${ipv6_default_interface}`
715                 route add -inet6 ff02:: ${laddr} -prefixlen 16 -interface \
716                         -cloning
717
718                 # Disable installing the default interface with the
719                 # case net.inet6.ip6.forwarding=0 and
720                 # net.inet6.ip6.accept_rtadv=0, due to avoid conflict
721                 # between the default router list and the manual
722                 # configured default route.
723                 case ${ipv6_gateway_enable} in
724                 [Yy][Ee][Ss])
725                         ;;
726                 *)
727                         if [ `sysctl -n net.inet6.ip6.accept_rtadv` -eq 1 ]
728                         then
729                                 ndp -I ${ipv6_default_interface}
730                         fi
731                         ;;
732                 esac
733                 ;;
734         esac
735 }
736
737 network6_getladdr()
738 {
739         ifconfig $1 2>/dev/null | while read proto addr rest; do
740                 case ${proto} in
741                 inet6)
742                         case ${addr} in
743                         fe80::*)
744                                 if [ -z "$2" ]; then
745                                         echo ${addr}
746                                         return
747                                 fi
748                                 case ${rest} in
749                                 *tentative*)
750                                         continue
751                                         ;;
752                                 *)
753                                         echo ${addr}
754                                         return
755                                 esac
756                         esac
757                 esac
758         done
759 }