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1/*
2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#ifndef lint
31static const char copyright[] =
32"@(#) Copyright (c) 1983, 1993\n\
33 The Regents of the University of California. All rights reserved.\n";
34#endif /* not lint */
35
36#ifndef lint
37#if 0
38static char sccsid[] = "@(#)ifconfig.c 8.2 (Berkeley) 2/16/94";
39#endif
40static const char rcsid[] =
41 "$FreeBSD: head/sbin/ifconfig/ifconfig.c 206637 2010-04-14 22:02:19Z delphij $";
41 "$FreeBSD: head/sbin/ifconfig/ifconfig.c 210936 2010-08-06 15:09:21Z jhb $";
42#endif /* not lint */
43
44#include <sys/param.h>
45#include <sys/ioctl.h>
46#include <sys/socket.h>
47#include <sys/time.h>
48#include <sys/module.h>
49#include <sys/linker.h>
50
51#include <net/ethernet.h>
52#include <net/if.h>
53#include <net/if_var.h>
54#include <net/if_dl.h>
55#include <net/if_types.h>
56#include <net/route.h>
57
58/* IP */
59#include <netinet/in.h>
60#include <netinet/in_var.h>
61#include <arpa/inet.h>
62#include <netdb.h>
63
64#include <ifaddrs.h>
65#include <ctype.h>
66#include <err.h>
67#include <errno.h>
68#include <fcntl.h>
69#include <jail.h>
70#include <stdio.h>
71#include <stdlib.h>
72#include <string.h>
73#include <unistd.h>
74
75#include "ifconfig.h"
76
77/*
78 * Since "struct ifreq" is composed of various union members, callers
79 * should pay special attention to interprete the value.
80 * (.e.g. little/big endian difference in the structure.)
81 */
82struct ifreq ifr;
83
84char name[IFNAMSIZ];
85char *descr = NULL;
86size_t descrlen = 64;
87int setaddr;
88int setmask;
89int doalias;
90int clearaddr;
91int newaddr = 1;
92int verbose;
93int noload;
94
95int supmedia = 0;
96int printkeys = 0; /* Print keying material for interfaces. */
97
98static int ifconfig(int argc, char *const *argv, int iscreate,
99 const struct afswtch *afp);
100static void status(const struct afswtch *afp, const struct sockaddr_dl *sdl,
101 struct ifaddrs *ifa);
102static void tunnel_status(int s);
103static void usage(void);
104
105static struct afswtch *af_getbyname(const char *name);
106static struct afswtch *af_getbyfamily(int af);
107static void af_other_status(int);
108
109static struct option *opts = NULL;
110
111void
112opt_register(struct option *p)
113{
114 p->next = opts;
115 opts = p;
116}
117
118static void
119usage(void)
120{
121 char options[1024];
122 struct option *p;
123
124 /* XXX not right but close enough for now */
125 options[0] = '\0';
126 for (p = opts; p != NULL; p = p->next) {
127 strlcat(options, p->opt_usage, sizeof(options));
128 strlcat(options, " ", sizeof(options));
129 }
130
131 fprintf(stderr,
132 "usage: ifconfig %sinterface address_family [address [dest_address]]\n"
133 " [parameters]\n"
134 " ifconfig interface create\n"
135 " ifconfig -a %s[-d] [-m] [-u] [-v] [address_family]\n"
136 " ifconfig -l [-d] [-u] [address_family]\n"
137 " ifconfig %s[-d] [-m] [-u] [-v]\n",
138 options, options, options);
139 exit(1);
140}
141
142int
143main(int argc, char *argv[])
144{
145 int c, all, namesonly, downonly, uponly;
146 const struct afswtch *afp = NULL;
147 int ifindex;
148 struct ifaddrs *ifap, *ifa;
149 struct ifreq paifr;
150 const struct sockaddr_dl *sdl;
151 char options[1024], *cp, *namecp = NULL;
152 const char *ifname;
153 struct option *p;
154 size_t iflen;
155
156 all = downonly = uponly = namesonly = noload = verbose = 0;
157
158 /* Parse leading line options */
159 strlcpy(options, "adklmnuv", sizeof(options));
160 for (p = opts; p != NULL; p = p->next)
161 strlcat(options, p->opt, sizeof(options));
162 while ((c = getopt(argc, argv, options)) != -1) {
163 switch (c) {
164 case 'a': /* scan all interfaces */
165 all++;
166 break;
167 case 'd': /* restrict scan to "down" interfaces */
168 downonly++;
169 break;
170 case 'k':
171 printkeys++;
172 break;
173 case 'l': /* scan interface names only */
174 namesonly++;
175 break;
176 case 'm': /* show media choices in status */
177 supmedia = 1;
178 break;
179 case 'n': /* suppress module loading */
180 noload++;
181 break;
182 case 'u': /* restrict scan to "up" interfaces */
183 uponly++;
184 break;
185 case 'v':
186 verbose++;
187 break;
188 default:
189 for (p = opts; p != NULL; p = p->next)
190 if (p->opt[0] == c) {
191 p->cb(optarg);
192 break;
193 }
194 if (p == NULL)
195 usage();
196 break;
197 }
198 }
199 argc -= optind;
200 argv += optind;
201
202 /* -l cannot be used with -a or -m */
203 if (namesonly && (all || supmedia))
204 usage();
205
206 /* nonsense.. */
207 if (uponly && downonly)
208 usage();
209
210 /* no arguments is equivalent to '-a' */
211 if (!namesonly && argc < 1)
212 all = 1;
213
214 /* -a and -l allow an address family arg to limit the output */
215 if (all || namesonly) {
216 if (argc > 1)
217 usage();
218
219 ifname = NULL;
220 ifindex = 0;
221 if (argc == 1) {
222 afp = af_getbyname(*argv);
223 if (afp == NULL)
224 usage();
225 if (afp->af_name != NULL)
226 argc--, argv++;
227 /* leave with afp non-zero */
228 }
229 } else {
230 /* not listing, need an argument */
231 if (argc < 1)
232 usage();
233
234 ifname = *argv;
235 argc--, argv++;
236
237 /* check and maybe load support for this interface */
238 ifmaybeload(ifname);
239
240 ifindex = if_nametoindex(ifname);
241 if (ifindex == 0) {
242 /*
243 * NOTE: We must special-case the `create' command
244 * right here as we would otherwise fail when trying
245 * to find the interface.
246 */
247 if (argc > 0 && (strcmp(argv[0], "create") == 0 ||
248 strcmp(argv[0], "plumb") == 0)) {
249 iflen = strlcpy(name, ifname, sizeof(name));
250 if (iflen >= sizeof(name))
251 errx(1, "%s: cloning name too long",
252 ifname);
253 ifconfig(argc, argv, 1, NULL);
254 exit(0);
255 }
256 /*
257 * NOTE: We have to special-case the `-vnet' command
258 * right here as we would otherwise fail when trying
259 * to find the interface as it lives in another vnet.
260 */
261 if (argc > 0 && (strcmp(argv[0], "-vnet") == 0)) {
262 iflen = strlcpy(name, ifname, sizeof(name));
263 if (iflen >= sizeof(name))
264 errx(1, "%s: interface name too long",
265 ifname);
266 ifconfig(argc, argv, 0, NULL);
267 exit(0);
268 }
269 errx(1, "interface %s does not exist", ifname);
270 }
271 }
272
273 /* Check for address family */
274 if (argc > 0) {
275 afp = af_getbyname(*argv);
276 if (afp != NULL)
277 argc--, argv++;
278 }
279
280 if (getifaddrs(&ifap) != 0)
281 err(EXIT_FAILURE, "getifaddrs");
282 cp = NULL;
283 ifindex = 0;
284 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
285 memset(&paifr, 0, sizeof(paifr));
286 strncpy(paifr.ifr_name, ifa->ifa_name, sizeof(paifr.ifr_name));
287 if (sizeof(paifr.ifr_addr) >= ifa->ifa_addr->sa_len) {
288 memcpy(&paifr.ifr_addr, ifa->ifa_addr,
289 ifa->ifa_addr->sa_len);
290 }
291
292 if (ifname != NULL && strcmp(ifname, ifa->ifa_name) != 0)
293 continue;
294 if (ifa->ifa_addr->sa_family == AF_LINK)
295 sdl = (const struct sockaddr_dl *) ifa->ifa_addr;
296 else
297 sdl = NULL;
298 if (cp != NULL && strcmp(cp, ifa->ifa_name) == 0 && !namesonly)
299 continue;
300 iflen = strlcpy(name, ifa->ifa_name, sizeof(name));
301 if (iflen >= sizeof(name)) {
302 warnx("%s: interface name too long, skipping",
303 ifa->ifa_name);
304 continue;
305 }
306 cp = ifa->ifa_name;
307
308 if (downonly && (ifa->ifa_flags & IFF_UP) != 0)
309 continue;
310 if (uponly && (ifa->ifa_flags & IFF_UP) == 0)
311 continue;
312 /*
313 * Are we just listing the interfaces?
314 */
315 if (namesonly) {
316 if (namecp == cp)
317 continue;
318 if (afp != NULL) {
319 /* special case for "ether" address family */
320 if (!strcmp(afp->af_name, "ether")) {
321 if (sdl == NULL ||
322 sdl->sdl_type != IFT_ETHER ||
322 (sdl->sdl_type != IFT_ETHER &&
323 sdl->sdl_type != IFT_L2VLAN &&
324 sdl->sdl_type != IFT_BRIDGE) ||
325 sdl->sdl_alen != ETHER_ADDR_LEN)
326 continue;
327 } else {
328 if (ifa->ifa_addr->sa_family != afp->af_af)
329 continue;
330 }
331 }
332 namecp = cp;
333 ifindex++;
334 if (ifindex > 1)
335 printf(" ");
336 fputs(name, stdout);
337 continue;
338 }
339 ifindex++;
340
341 if (argc > 0)
342 ifconfig(argc, argv, 0, afp);
343 else
344 status(afp, sdl, ifa);
345 }
346 if (namesonly)
347 printf("\n");
348 freeifaddrs(ifap);
349
350 exit(0);
351}
352
353static struct afswtch *afs = NULL;
354
355void
356af_register(struct afswtch *p)
357{
358 p->af_next = afs;
359 afs = p;
360}
361
362static struct afswtch *
363af_getbyname(const char *name)
364{
365 struct afswtch *afp;
366
367 for (afp = afs; afp != NULL; afp = afp->af_next)
368 if (strcmp(afp->af_name, name) == 0)
369 return afp;
370 return NULL;
371}
372
373static struct afswtch *
374af_getbyfamily(int af)
375{
376 struct afswtch *afp;
377
378 for (afp = afs; afp != NULL; afp = afp->af_next)
379 if (afp->af_af == af)
380 return afp;
381 return NULL;
382}
383
384static void
385af_other_status(int s)
386{
387 struct afswtch *afp;
388 uint8_t afmask[howmany(AF_MAX, NBBY)];
389
390 memset(afmask, 0, sizeof(afmask));
391 for (afp = afs; afp != NULL; afp = afp->af_next) {
392 if (afp->af_other_status == NULL)
393 continue;
394 if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af))
395 continue;
396 afp->af_other_status(s);
397 setbit(afmask, afp->af_af);
398 }
399}
400
401static void
402af_all_tunnel_status(int s)
403{
404 struct afswtch *afp;
405 uint8_t afmask[howmany(AF_MAX, NBBY)];
406
407 memset(afmask, 0, sizeof(afmask));
408 for (afp = afs; afp != NULL; afp = afp->af_next) {
409 if (afp->af_status_tunnel == NULL)
410 continue;
411 if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af))
412 continue;
413 afp->af_status_tunnel(s);
414 setbit(afmask, afp->af_af);
415 }
416}
417
418static struct cmd *cmds = NULL;
419
420void
421cmd_register(struct cmd *p)
422{
423 p->c_next = cmds;
424 cmds = p;
425}
426
427static const struct cmd *
428cmd_lookup(const char *name, int iscreate)
429{
430#define N(a) (sizeof(a)/sizeof(a[0]))
431 const struct cmd *p;
432
433 for (p = cmds; p != NULL; p = p->c_next)
434 if (strcmp(name, p->c_name) == 0) {
435 if (iscreate) {
436 if (p->c_iscloneop)
437 return p;
438 } else {
439 if (!p->c_iscloneop)
440 return p;
441 }
442 }
443 return NULL;
444#undef N
445}
446
447struct callback {
448 callback_func *cb_func;
449 void *cb_arg;
450 struct callback *cb_next;
451};
452static struct callback *callbacks = NULL;
453
454void
455callback_register(callback_func *func, void *arg)
456{
457 struct callback *cb;
458
459 cb = malloc(sizeof(struct callback));
460 if (cb == NULL)
461 errx(1, "unable to allocate memory for callback");
462 cb->cb_func = func;
463 cb->cb_arg = arg;
464 cb->cb_next = callbacks;
465 callbacks = cb;
466}
467
468/* specially-handled commands */
469static void setifaddr(const char *, int, int, const struct afswtch *);
470static const struct cmd setifaddr_cmd = DEF_CMD("ifaddr", 0, setifaddr);
471
472static void setifdstaddr(const char *, int, int, const struct afswtch *);
473static const struct cmd setifdstaddr_cmd =
474 DEF_CMD("ifdstaddr", 0, setifdstaddr);
475
476static int
477ifconfig(int argc, char *const *argv, int iscreate, const struct afswtch *uafp)
478{
479 const struct afswtch *afp, *nafp;
480 const struct cmd *p;
481 struct callback *cb;
482 int s;
483
484 strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name);
485 afp = uafp != NULL ? uafp : af_getbyname("inet");
486top:
487 ifr.ifr_addr.sa_family =
488 afp->af_af == AF_LINK || afp->af_af == AF_UNSPEC ?
489 AF_LOCAL : afp->af_af;
490
491 if ((s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0)) < 0 &&
492 (uafp != NULL || errno != EPROTONOSUPPORT ||
493 (s = socket(AF_LOCAL, SOCK_DGRAM, 0)) < 0))
494 err(1, "socket(family %u,SOCK_DGRAM", ifr.ifr_addr.sa_family);
495
496 while (argc > 0) {
497 p = cmd_lookup(*argv, iscreate);
498 if (iscreate && p == NULL) {
499 /*
500 * Push the clone create callback so the new
501 * device is created and can be used for any
502 * remaining arguments.
503 */
504 cb = callbacks;
505 if (cb == NULL)
506 errx(1, "internal error, no callback");
507 callbacks = cb->cb_next;
508 cb->cb_func(s, cb->cb_arg);
509 iscreate = 0;
510 /*
511 * Handle any address family spec that
512 * immediately follows and potentially
513 * recreate the socket.
514 */
515 nafp = af_getbyname(*argv);
516 if (nafp != NULL) {
517 argc--, argv++;
518 if (nafp != afp) {
519 close(s);
520 afp = nafp;
521 goto top;
522 }
523 }
524 /*
525 * Look for a normal parameter.
526 */
527 continue;
528 }
529 if (p == NULL) {
530 /*
531 * Not a recognized command, choose between setting
532 * the interface address and the dst address.
533 */
534 p = (setaddr ? &setifdstaddr_cmd : &setifaddr_cmd);
535 }
536 if (p->c_u.c_func || p->c_u.c_func2) {
537 if (p->c_parameter == NEXTARG) {
538 if (argv[1] == NULL)
539 errx(1, "'%s' requires argument",
540 p->c_name);
541 p->c_u.c_func(argv[1], 0, s, afp);
542 argc--, argv++;
543 } else if (p->c_parameter == OPTARG) {
544 p->c_u.c_func(argv[1], 0, s, afp);
545 if (argv[1] != NULL)
546 argc--, argv++;
547 } else if (p->c_parameter == NEXTARG2) {
548 if (argc < 3)
549 errx(1, "'%s' requires 2 arguments",
550 p->c_name);
551 p->c_u.c_func2(argv[1], argv[2], s, afp);
552 argc -= 2, argv += 2;
553 } else
554 p->c_u.c_func(*argv, p->c_parameter, s, afp);
555 }
556 argc--, argv++;
557 }
558
559 /*
560 * Do any post argument processing required by the address family.
561 */
562 if (afp->af_postproc != NULL)
563 afp->af_postproc(s, afp);
564 /*
565 * Do deferred callbacks registered while processing
566 * command-line arguments.
567 */
568 for (cb = callbacks; cb != NULL; cb = cb->cb_next)
569 cb->cb_func(s, cb->cb_arg);
570 /*
571 * Do deferred operations.
572 */
573 if (clearaddr) {
574 if (afp->af_ridreq == NULL || afp->af_difaddr == 0) {
575 warnx("interface %s cannot change %s addresses!",
576 name, afp->af_name);
577 clearaddr = 0;
578 }
579 }
580 if (clearaddr) {
581 int ret;
582 strncpy(afp->af_ridreq, name, sizeof ifr.ifr_name);
583 ret = ioctl(s, afp->af_difaddr, afp->af_ridreq);
584 if (ret < 0) {
585 if (errno == EADDRNOTAVAIL && (doalias >= 0)) {
586 /* means no previous address for interface */
587 } else
588 Perror("ioctl (SIOCDIFADDR)");
589 }
590 }
591 if (newaddr) {
592 if (afp->af_addreq == NULL || afp->af_aifaddr == 0) {
593 warnx("interface %s cannot change %s addresses!",
594 name, afp->af_name);
595 newaddr = 0;
596 }
597 }
598 if (newaddr && (setaddr || setmask)) {
599 strncpy(afp->af_addreq, name, sizeof ifr.ifr_name);
600 if (ioctl(s, afp->af_aifaddr, afp->af_addreq) < 0)
601 Perror("ioctl (SIOCAIFADDR)");
602 }
603
604 close(s);
605 return(0);
606}
607
608/*ARGSUSED*/
609static void
610setifaddr(const char *addr, int param, int s, const struct afswtch *afp)
611{
612 if (afp->af_getaddr == NULL)
613 return;
614 /*
615 * Delay the ioctl to set the interface addr until flags are all set.
616 * The address interpretation may depend on the flags,
617 * and the flags may change when the address is set.
618 */
619 setaddr++;
620 if (doalias == 0 && afp->af_af != AF_LINK)
621 clearaddr = 1;
622 afp->af_getaddr(addr, (doalias >= 0 ? ADDR : RIDADDR));
623}
624
625static void
626settunnel(const char *src, const char *dst, int s, const struct afswtch *afp)
627{
628 struct addrinfo *srcres, *dstres;
629 int ecode;
630
631 if (afp->af_settunnel == NULL) {
632 warn("address family %s does not support tunnel setup",
633 afp->af_name);
634 return;
635 }
636
637 if ((ecode = getaddrinfo(src, NULL, NULL, &srcres)) != 0)
638 errx(1, "error in parsing address string: %s",
639 gai_strerror(ecode));
640
641 if ((ecode = getaddrinfo(dst, NULL, NULL, &dstres)) != 0)
642 errx(1, "error in parsing address string: %s",
643 gai_strerror(ecode));
644
645 if (srcres->ai_addr->sa_family != dstres->ai_addr->sa_family)
646 errx(1,
647 "source and destination address families do not match");
648
649 afp->af_settunnel(s, srcres, dstres);
650
651 freeaddrinfo(srcres);
652 freeaddrinfo(dstres);
653}
654
655/* ARGSUSED */
656static void
657deletetunnel(const char *vname, int param, int s, const struct afswtch *afp)
658{
659
660 if (ioctl(s, SIOCDIFPHYADDR, &ifr) < 0)
661 err(1, "SIOCDIFPHYADDR");
662}
663
664static void
665setifvnet(const char *jname, int dummy __unused, int s,
666 const struct afswtch *afp)
667{
668 struct ifreq my_ifr;
669
670 memcpy(&my_ifr, &ifr, sizeof(my_ifr));
671 my_ifr.ifr_jid = jail_getid(jname);
672 if (my_ifr.ifr_jid < 0)
673 errx(1, "%s", jail_errmsg);
674 if (ioctl(s, SIOCSIFVNET, &my_ifr) < 0)
675 err(1, "SIOCSIFVNET");
676}
677
678static void
679setifrvnet(const char *jname, int dummy __unused, int s,
680 const struct afswtch *afp)
681{
682 struct ifreq my_ifr;
683
684 memcpy(&my_ifr, &ifr, sizeof(my_ifr));
685 my_ifr.ifr_jid = jail_getid(jname);
686 if (my_ifr.ifr_jid < 0)
687 errx(1, "%s", jail_errmsg);
688 if (ioctl(s, SIOCSIFRVNET, &my_ifr) < 0)
689 err(1, "SIOCSIFRVNET(%d, %s)", my_ifr.ifr_jid, my_ifr.ifr_name);
690}
691
692static void
693setifnetmask(const char *addr, int dummy __unused, int s,
694 const struct afswtch *afp)
695{
696 if (afp->af_getaddr != NULL) {
697 setmask++;
698 afp->af_getaddr(addr, MASK);
699 }
700}
701
702static void
703setifbroadaddr(const char *addr, int dummy __unused, int s,
704 const struct afswtch *afp)
705{
706 if (afp->af_getaddr != NULL)
707 afp->af_getaddr(addr, DSTADDR);
708}
709
710static void
711setifipdst(const char *addr, int dummy __unused, int s,
712 const struct afswtch *afp)
713{
714 const struct afswtch *inet;
715
716 inet = af_getbyname("inet");
717 if (inet == NULL)
718 return;
719 inet->af_getaddr(addr, DSTADDR);
720 clearaddr = 0;
721 newaddr = 0;
722}
723
724static void
725notealias(const char *addr, int param, int s, const struct afswtch *afp)
726{
727#define rqtosa(x) (&(((struct ifreq *)(afp->x))->ifr_addr))
728 if (setaddr && doalias == 0 && param < 0)
729 if (afp->af_addreq != NULL && afp->af_ridreq != NULL)
730 bcopy((caddr_t)rqtosa(af_addreq),
731 (caddr_t)rqtosa(af_ridreq),
732 rqtosa(af_addreq)->sa_len);
733 doalias = param;
734 if (param < 0) {
735 clearaddr = 1;
736 newaddr = 0;
737 } else
738 clearaddr = 0;
739#undef rqtosa
740}
741
742/*ARGSUSED*/
743static void
744setifdstaddr(const char *addr, int param __unused, int s,
745 const struct afswtch *afp)
746{
747 if (afp->af_getaddr != NULL)
748 afp->af_getaddr(addr, DSTADDR);
749}
750
751/*
752 * Note: doing an SIOCIGIFFLAGS scribbles on the union portion
753 * of the ifreq structure, which may confuse other parts of ifconfig.
754 * Make a private copy so we can avoid that.
755 */
756static void
757setifflags(const char *vname, int value, int s, const struct afswtch *afp)
758{
759 struct ifreq my_ifr;
760 int flags;
761
762 memset(&my_ifr, 0, sizeof(my_ifr));
763 (void) strlcpy(my_ifr.ifr_name, name, sizeof(my_ifr.ifr_name));
764
765 if (ioctl(s, SIOCGIFFLAGS, (caddr_t)&my_ifr) < 0) {
766 Perror("ioctl (SIOCGIFFLAGS)");
767 exit(1);
768 }
769 flags = (my_ifr.ifr_flags & 0xffff) | (my_ifr.ifr_flagshigh << 16);
770
771 if (value < 0) {
772 value = -value;
773 flags &= ~value;
774 } else
775 flags |= value;
776 my_ifr.ifr_flags = flags & 0xffff;
777 my_ifr.ifr_flagshigh = flags >> 16;
778 if (ioctl(s, SIOCSIFFLAGS, (caddr_t)&my_ifr) < 0)
779 Perror(vname);
780}
781
782void
783setifcap(const char *vname, int value, int s, const struct afswtch *afp)
784{
785 int flags;
786
787 if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) < 0) {
788 Perror("ioctl (SIOCGIFCAP)");
789 exit(1);
790 }
791 flags = ifr.ifr_curcap;
792 if (value < 0) {
793 value = -value;
794 flags &= ~value;
795 } else
796 flags |= value;
797 flags &= ifr.ifr_reqcap;
798 ifr.ifr_reqcap = flags;
799 if (ioctl(s, SIOCSIFCAP, (caddr_t)&ifr) < 0)
800 Perror(vname);
801}
802
803static void
804setifmetric(const char *val, int dummy __unused, int s,
805 const struct afswtch *afp)
806{
807 strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
808 ifr.ifr_metric = atoi(val);
809 if (ioctl(s, SIOCSIFMETRIC, (caddr_t)&ifr) < 0)
810 warn("ioctl (set metric)");
811}
812
813static void
814setifmtu(const char *val, int dummy __unused, int s,
815 const struct afswtch *afp)
816{
817 strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
818 ifr.ifr_mtu = atoi(val);
819 if (ioctl(s, SIOCSIFMTU, (caddr_t)&ifr) < 0)
820 warn("ioctl (set mtu)");
821}
822
823static void
824setifname(const char *val, int dummy __unused, int s,
825 const struct afswtch *afp)
826{
827 char *newname;
828
829 newname = strdup(val);
830 if (newname == NULL) {
831 warn("no memory to set ifname");
832 return;
833 }
834 ifr.ifr_data = newname;
835 if (ioctl(s, SIOCSIFNAME, (caddr_t)&ifr) < 0) {
836 warn("ioctl (set name)");
837 free(newname);
838 return;
839 }
840 strlcpy(name, newname, sizeof(name));
841 free(newname);
842}
843
844/* ARGSUSED */
845static void
846setifdescr(const char *val, int dummy __unused, int s,
847 const struct afswtch *afp)
848{
849 char *newdescr;
850
851 ifr.ifr_buffer.length = strlen(val) + 1;
852 if (ifr.ifr_buffer.length == 1) {
853 ifr.ifr_buffer.buffer = newdescr = NULL;
854 ifr.ifr_buffer.length = 0;
855 } else {
856 newdescr = strdup(val);
857 ifr.ifr_buffer.buffer = newdescr;
858 if (newdescr == NULL) {
859 warn("no memory to set ifdescr");
860 return;
861 }
862 }
863
864 if (ioctl(s, SIOCSIFDESCR, (caddr_t)&ifr) < 0)
865 warn("ioctl (set descr)");
866
867 free(newdescr);
868}
869
870/* ARGSUSED */
871static void
872unsetifdescr(const char *val, int value, int s, const struct afswtch *afp)
873{
874
875 setifdescr("", 0, s, 0);
876}
877
878#define IFFBITS \
879"\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT\6SMART\7RUNNING" \
880"\10NOARP\11PROMISC\12ALLMULTI\13OACTIVE\14SIMPLEX\15LINK0\16LINK1\17LINK2" \
881"\20MULTICAST\22PPROMISC\23MONITOR\24STATICARP"
882
883#define IFCAPBITS \
884"\020\1RXCSUM\2TXCSUM\3NETCONS\4VLAN_MTU\5VLAN_HWTAGGING\6JUMBO_MTU\7POLLING" \
885"\10VLAN_HWCSUM\11TSO4\12TSO6\13LRO\14WOL_UCAST\15WOL_MCAST\16WOL_MAGIC" \
886"\21VLAN_HWFILTER\23VLAN_HWTSO\24LINKSTATE"
887
888/*
889 * Print the status of the interface. If an address family was
890 * specified, show only it; otherwise, show them all.
891 */
892static void
893status(const struct afswtch *afp, const struct sockaddr_dl *sdl,
894 struct ifaddrs *ifa)
895{
896 struct ifaddrs *ift;
897 int allfamilies, s;
898 struct ifstat ifs;
899
900 if (afp == NULL) {
901 allfamilies = 1;
902 ifr.ifr_addr.sa_family = AF_LOCAL;
903 } else {
904 allfamilies = 0;
905 ifr.ifr_addr.sa_family =
906 afp->af_af == AF_LINK ? AF_LOCAL : afp->af_af;
907 }
908 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
909
910 s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0);
911 if (s < 0)
912 err(1, "socket(family %u,SOCK_DGRAM)", ifr.ifr_addr.sa_family);
913
914 printf("%s: ", name);
915 printb("flags", ifa->ifa_flags, IFFBITS);
916 if (ioctl(s, SIOCGIFMETRIC, &ifr) != -1)
917 printf(" metric %d", ifr.ifr_metric);
918 if (ioctl(s, SIOCGIFMTU, &ifr) != -1)
919 printf(" mtu %d", ifr.ifr_mtu);
920 putchar('\n');
921
922 for (;;) {
923 if ((descr = reallocf(descr, descrlen)) != NULL) {
924 ifr.ifr_buffer.buffer = descr;
925 ifr.ifr_buffer.length = descrlen;
926 if (ioctl(s, SIOCGIFDESCR, &ifr) == 0) {
927 if (ifr.ifr_buffer.buffer == descr) {
928 if (strlen(descr) > 0)
929 printf("\tdescription: %s\n",
930 descr);
931 } else if (ifr.ifr_buffer.length > descrlen) {
932 descrlen = ifr.ifr_buffer.length;
933 continue;
934 }
935 }
936 } else
937 warn("unable to allocate memory for interface"
938 "description");
939 break;
940 }
941
942 if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) == 0) {
943 if (ifr.ifr_curcap != 0) {
944 printb("\toptions", ifr.ifr_curcap, IFCAPBITS);
945 putchar('\n');
946 }
947 if (supmedia && ifr.ifr_reqcap != 0) {
948 printb("\tcapabilities", ifr.ifr_reqcap, IFCAPBITS);
949 putchar('\n');
950 }
951 }
952
953 tunnel_status(s);
954
955 for (ift = ifa; ift != NULL; ift = ift->ifa_next) {
956 if (ift->ifa_addr == NULL)
957 continue;
958 if (strcmp(ifa->ifa_name, ift->ifa_name) != 0)
959 continue;
960 if (allfamilies) {
961 const struct afswtch *p;
962 p = af_getbyfamily(ift->ifa_addr->sa_family);
963 if (p != NULL && p->af_status != NULL)
964 p->af_status(s, ift);
965 } else if (afp->af_af == ift->ifa_addr->sa_family)
966 afp->af_status(s, ift);
967 }
968#if 0
969 if (allfamilies || afp->af_af == AF_LINK) {
970 const struct afswtch *lafp;
971
972 /*
973 * Hack; the link level address is received separately
974 * from the routing information so any address is not
975 * handled above. Cobble together an entry and invoke
976 * the status method specially.
977 */
978 lafp = af_getbyname("lladdr");
979 if (lafp != NULL) {
980 info.rti_info[RTAX_IFA] = (struct sockaddr *)sdl;
981 lafp->af_status(s, &info);
982 }
983 }
984#endif
985 if (allfamilies)
986 af_other_status(s);
987 else if (afp->af_other_status != NULL)
988 afp->af_other_status(s);
989
990 strncpy(ifs.ifs_name, name, sizeof ifs.ifs_name);
991 if (ioctl(s, SIOCGIFSTATUS, &ifs) == 0)
992 printf("%s", ifs.ascii);
993
994 close(s);
995 return;
996}
997
998static void
999tunnel_status(int s)
1000{
1001 af_all_tunnel_status(s);
1002}
1003
1004void
1005Perror(const char *cmd)
1006{
1007 switch (errno) {
1008
1009 case ENXIO:
1010 errx(1, "%s: no such interface", cmd);
1011 break;
1012
1013 case EPERM:
1014 errx(1, "%s: permission denied", cmd);
1015 break;
1016
1017 default:
1018 err(1, "%s", cmd);
1019 }
1020}
1021
1022/*
1023 * Print a value a la the %b format of the kernel's printf
1024 */
1025void
1026printb(const char *s, unsigned v, const char *bits)
1027{
1028 int i, any = 0;
1029 char c;
1030
1031 if (bits && *bits == 8)
1032 printf("%s=%o", s, v);
1033 else
1034 printf("%s=%x", s, v);
1035 bits++;
1036 if (bits) {
1037 putchar('<');
1038 while ((i = *bits++) != '\0') {
1039 if (v & (1 << (i-1))) {
1040 if (any)
1041 putchar(',');
1042 any = 1;
1043 for (; (c = *bits) > 32; bits++)
1044 putchar(c);
1045 } else
1046 for (; *bits > 32; bits++)
1047 ;
1048 }
1049 putchar('>');
1050 }
1051}
1052
1053void
1054ifmaybeload(const char *name)
1055{
1056#define MOD_PREFIX_LEN 3 /* "if_" */
1057 struct module_stat mstat;
1058 int fileid, modid;
1059 char ifkind[IFNAMSIZ + MOD_PREFIX_LEN], ifname[IFNAMSIZ], *dp;
1060 const char *cp;
1061
1062 /* loading suppressed by the user */
1063 if (noload)
1064 return;
1065
1066 /* trim the interface number off the end */
1067 strlcpy(ifname, name, sizeof(ifname));
1068 for (dp = ifname; *dp != 0; dp++)
1069 if (isdigit(*dp)) {
1070 *dp = 0;
1071 break;
1072 }
1073
1074 /* turn interface and unit into module name */
1075 strcpy(ifkind, "if_");
1076 strlcpy(ifkind + MOD_PREFIX_LEN, ifname,
1077 sizeof(ifkind) - MOD_PREFIX_LEN);
1078
1079 /* scan files in kernel */
1080 mstat.version = sizeof(struct module_stat);
1081 for (fileid = kldnext(0); fileid > 0; fileid = kldnext(fileid)) {
1082 /* scan modules in file */
1083 for (modid = kldfirstmod(fileid); modid > 0;
1084 modid = modfnext(modid)) {
1085 if (modstat(modid, &mstat) < 0)
1086 continue;
1087 /* strip bus name if present */
1088 if ((cp = strchr(mstat.name, '/')) != NULL) {
1089 cp++;
1090 } else {
1091 cp = mstat.name;
1092 }
1093 /* already loaded? */
1094 if (strncmp(ifname, cp, strlen(ifname) + 1) == 0 ||
1095 strncmp(ifkind, cp, strlen(ifkind) + 1) == 0)
1096 return;
1097 }
1098 }
1099
1100 /* not present, we should try to load it */
1101 kldload(ifkind);
1102}
1103
1104static struct cmd basic_cmds[] = {
1105 DEF_CMD("up", IFF_UP, setifflags),
1106 DEF_CMD("down", -IFF_UP, setifflags),
1107 DEF_CMD("arp", -IFF_NOARP, setifflags),
1108 DEF_CMD("-arp", IFF_NOARP, setifflags),
1109 DEF_CMD("debug", IFF_DEBUG, setifflags),
1110 DEF_CMD("-debug", -IFF_DEBUG, setifflags),
1111 DEF_CMD_ARG("description", setifdescr),
1112 DEF_CMD_ARG("descr", setifdescr),
1113 DEF_CMD("-description", 0, unsetifdescr),
1114 DEF_CMD("-descr", 0, unsetifdescr),
1115 DEF_CMD("promisc", IFF_PPROMISC, setifflags),
1116 DEF_CMD("-promisc", -IFF_PPROMISC, setifflags),
1117 DEF_CMD("add", IFF_UP, notealias),
1118 DEF_CMD("alias", IFF_UP, notealias),
1119 DEF_CMD("-alias", -IFF_UP, notealias),
1120 DEF_CMD("delete", -IFF_UP, notealias),
1121 DEF_CMD("remove", -IFF_UP, notealias),
1122#ifdef notdef
1123#define EN_SWABIPS 0x1000
1124 DEF_CMD("swabips", EN_SWABIPS, setifflags),
1125 DEF_CMD("-swabips", -EN_SWABIPS, setifflags),
1126#endif
1127 DEF_CMD_ARG("netmask", setifnetmask),
1128 DEF_CMD_ARG("metric", setifmetric),
1129 DEF_CMD_ARG("broadcast", setifbroadaddr),
1130 DEF_CMD_ARG("ipdst", setifipdst),
1131 DEF_CMD_ARG2("tunnel", settunnel),
1132 DEF_CMD("-tunnel", 0, deletetunnel),
1133 DEF_CMD("deletetunnel", 0, deletetunnel),
1134 DEF_CMD_ARG("vnet", setifvnet),
1135 DEF_CMD_ARG("-vnet", setifrvnet),
1136 DEF_CMD("link0", IFF_LINK0, setifflags),
1137 DEF_CMD("-link0", -IFF_LINK0, setifflags),
1138 DEF_CMD("link1", IFF_LINK1, setifflags),
1139 DEF_CMD("-link1", -IFF_LINK1, setifflags),
1140 DEF_CMD("link2", IFF_LINK2, setifflags),
1141 DEF_CMD("-link2", -IFF_LINK2, setifflags),
1142 DEF_CMD("monitor", IFF_MONITOR, setifflags),
1143 DEF_CMD("-monitor", -IFF_MONITOR, setifflags),
1144 DEF_CMD("staticarp", IFF_STATICARP, setifflags),
1145 DEF_CMD("-staticarp", -IFF_STATICARP, setifflags),
1146 DEF_CMD("rxcsum", IFCAP_RXCSUM, setifcap),
1147 DEF_CMD("-rxcsum", -IFCAP_RXCSUM, setifcap),
1148 DEF_CMD("txcsum", IFCAP_TXCSUM, setifcap),
1149 DEF_CMD("-txcsum", -IFCAP_TXCSUM, setifcap),
1150 DEF_CMD("netcons", IFCAP_NETCONS, setifcap),
1151 DEF_CMD("-netcons", -IFCAP_NETCONS, setifcap),
1152 DEF_CMD("polling", IFCAP_POLLING, setifcap),
1153 DEF_CMD("-polling", -IFCAP_POLLING, setifcap),
1154 DEF_CMD("tso", IFCAP_TSO, setifcap),
1155 DEF_CMD("-tso", -IFCAP_TSO, setifcap),
1156 DEF_CMD("lro", IFCAP_LRO, setifcap),
1157 DEF_CMD("-lro", -IFCAP_LRO, setifcap),
1158 DEF_CMD("wol", IFCAP_WOL, setifcap),
1159 DEF_CMD("-wol", -IFCAP_WOL, setifcap),
1160 DEF_CMD("wol_ucast", IFCAP_WOL_UCAST, setifcap),
1161 DEF_CMD("-wol_ucast", -IFCAP_WOL_UCAST, setifcap),
1162 DEF_CMD("wol_mcast", IFCAP_WOL_MCAST, setifcap),
1163 DEF_CMD("-wol_mcast", -IFCAP_WOL_MCAST, setifcap),
1164 DEF_CMD("wol_magic", IFCAP_WOL_MAGIC, setifcap),
1165 DEF_CMD("-wol_magic", -IFCAP_WOL_MAGIC, setifcap),
1166 DEF_CMD("normal", -IFF_LINK0, setifflags),
1167 DEF_CMD("compress", IFF_LINK0, setifflags),
1168 DEF_CMD("noicmp", IFF_LINK1, setifflags),
1169 DEF_CMD_ARG("mtu", setifmtu),
1170 DEF_CMD_ARG("name", setifname),
1171};
1172
1173static __constructor void
1174ifconfig_ctor(void)
1175{
1176#define N(a) (sizeof(a) / sizeof(a[0]))
1177 size_t i;
1178
1179 for (i = 0; i < N(basic_cmds); i++)
1180 cmd_register(&basic_cmds[i]);
1181#undef N
1182}