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 181224 2008-08-03 03:36:12Z thompsa $";
42#endif /* not lint */
43
44#include <sys/param.h>
45#include <sys/ioctl.h>
46#include <sys/socket.h>
47#include <sys/sysctl.h>
48#include <sys/time.h>
49#include <sys/module.h>
50#include <sys/linker.h>
51
52#include <net/ethernet.h>
53#include <net/if.h>
54#include <net/if_var.h>
55#include <net/if_dl.h>
56#include <net/if_types.h>
57#include <net/route.h>
58
59/* IP */
60#include <netinet/in.h>
61#include <netinet/in_var.h>
62#include <arpa/inet.h>
63#include <netdb.h>
64
65#include <ifaddrs.h>
66#include <ctype.h>
67#include <err.h>
68#include <errno.h>
69#include <fcntl.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];
85int setaddr;
86int setmask;
87int doalias;
88int clearaddr;
89int newaddr = 1;
90int verbose;
91int noload;
92
93int supmedia = 0;
94int printkeys = 0; /* Print keying material for interfaces. */
95
96static int ifconfig(int argc, char *const *argv, int iscreate,
97 const struct afswtch *afp);
98static void status(const struct afswtch *afp, const struct sockaddr_dl *sdl,
99 struct ifaddrs *ifa);
100static void tunnel_status(int s);
101static void usage(void);
102
103static struct afswtch *af_getbyname(const char *name);
104static struct afswtch *af_getbyfamily(int af);
105static void af_other_status(int);
106
107static struct option *opts = NULL;
108
109void
110opt_register(struct option *p)
111{
112 p->next = opts;
113 opts = p;
114}
115
116static void
117usage(void)
118{
119 char options[1024];
120 struct option *p;
121
122 /* XXX not right but close enough for now */
123 options[0] = '\0';
124 for (p = opts; p != NULL; p = p->next) {
125 strlcat(options, p->opt_usage, sizeof(options));
126 strlcat(options, " ", sizeof(options));
127 }
128
129 fprintf(stderr,
130 "usage: ifconfig %sinterface address_family [address [dest_address]]\n"
131 " [parameters]\n"
132 " ifconfig interface create\n"
133 " ifconfig -a %s[-d] [-m] [-u] [-v] [address_family]\n"
134 " ifconfig -l [-d] [-u] [address_family]\n"
135 " ifconfig %s[-d] [-m] [-u] [-v]\n",
136 options, options, options);
137 exit(1);
138}
139
140int
141main(int argc, char *argv[])
142{
143 int c, all, namesonly, downonly, uponly;
144 const struct afswtch *afp = NULL;
145 int ifindex;
146 struct ifaddrs *ifap, *ifa;
147 struct ifreq paifr;
148 const struct sockaddr_dl *sdl;
149 char options[1024], *cp;
150 const char *ifname;
151 struct option *p;
152 size_t iflen;
153
154 all = downonly = uponly = namesonly = noload = verbose = 0;
155
156 /* Parse leading line options */
157 strlcpy(options, "adklmnuv", sizeof(options));
158 for (p = opts; p != NULL; p = p->next)
159 strlcat(options, p->opt, sizeof(options));
160 while ((c = getopt(argc, argv, options)) != -1) {
161 switch (c) {
162 case 'a': /* scan all interfaces */
163 all++;
164 break;
165 case 'd': /* restrict scan to "down" interfaces */
166 downonly++;
167 break;
168 case 'k':
169 printkeys++;
170 break;
171 case 'l': /* scan interface names only */
172 namesonly++;
173 break;
174 case 'm': /* show media choices in status */
175 supmedia = 1;
176 break;
177 case 'n': /* suppress module loading */
178 noload++;
179 break;
180 case 'u': /* restrict scan to "up" interfaces */
181 uponly++;
182 break;
183 case 'v':
184 verbose++;
185 break;
186 default:
187 for (p = opts; p != NULL; p = p->next)
188 if (p->opt[0] == c) {
189 p->cb(optarg);
190 break;
191 }
192 if (p == NULL)
193 usage();
194 break;
195 }
196 }
197 argc -= optind;
198 argv += optind;
199
200 /* -l cannot be used with -a or -m */
201 if (namesonly && (all || supmedia))
202 usage();
203
204 /* nonsense.. */
205 if (uponly && downonly)
206 usage();
207
208 /* no arguments is equivalent to '-a' */
209 if (!namesonly && argc < 1)
210 all = 1;
211
212 /* -a and -l allow an address family arg to limit the output */
213 if (all || namesonly) {
214 if (argc > 1)
215 usage();
216
217 ifname = NULL;
218 ifindex = 0;
219 if (argc == 1) {
220 afp = af_getbyname(*argv);
221 if (afp == NULL)
222 usage();
223 if (afp->af_name != NULL)
224 argc--, argv++;
225 /* leave with afp non-zero */
226 }
227 } else {
228 /* not listing, need an argument */
229 if (argc < 1)
230 usage();
231
232 ifname = *argv;
233 argc--, argv++;
234
235 /* check and maybe load support for this interface */
236 ifmaybeload(ifname);
237
238 ifindex = if_nametoindex(ifname);
239 if (ifindex == 0) {
240 /*
241 * NOTE: We must special-case the `create' command
242 * right here as we would otherwise fail when trying
243 * to find the interface.
244 */
245 if (argc > 0 && (strcmp(argv[0], "create") == 0 ||
246 strcmp(argv[0], "plumb") == 0)) {
247 iflen = strlcpy(name, ifname, sizeof(name));
248 if (iflen >= sizeof(name))
249 errx(1, "%s: cloning name too long",
250 ifname);
251 ifconfig(argc, argv, 1, NULL);
252 exit(0);
253 }
254 errx(1, "interface %s does not exist", ifname);
255 }
256 }
257
258 /* Check for address family */
259 if (argc > 0) {
260 afp = af_getbyname(*argv);
261 if (afp != NULL)
262 argc--, argv++;
263 }
264
265 if (getifaddrs(&ifap) != 0)
266 err(EXIT_FAILURE, "getifaddrs");
267 cp = NULL;
268 ifindex = 0;
269 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
270 memset(&paifr, 0, sizeof(paifr));
271 strncpy(paifr.ifr_name, ifa->ifa_name, sizeof(paifr.ifr_name));
272 if (sizeof(paifr.ifr_addr) >= ifa->ifa_addr->sa_len) {
273 memcpy(&paifr.ifr_addr, ifa->ifa_addr,
274 ifa->ifa_addr->sa_len);
275 }
276
277 if (ifname != NULL && strcmp(ifname, ifa->ifa_name) != 0)
278 continue;
279 if (ifa->ifa_addr->sa_family == AF_LINK)
280 sdl = (const struct sockaddr_dl *) ifa->ifa_addr;
281 else
282 sdl = NULL;
283 if (cp != NULL && strcmp(cp, ifa->ifa_name) == 0)
284 continue;
285 iflen = strlcpy(name, ifa->ifa_name, sizeof(name));
286 if (iflen >= sizeof(name)) {
287 warnx("%s: interface name too long, skipping",
288 ifa->ifa_name);
289 continue;
290 }
291 cp = ifa->ifa_name;
292
293 if (downonly && (ifa->ifa_flags & IFF_UP) != 0)
294 continue;
295 if (uponly && (ifa->ifa_flags & IFF_UP) == 0)
296 continue;
297 ifindex++;
298 /*
299 * Are we just listing the interfaces?
300 */
301 if (namesonly) {
302 if (ifindex > 1)
303 printf(" ");
304 fputs(name, stdout);
305 continue;
306 }
307
308 if (argc > 0)
309 ifconfig(argc, argv, 0, afp);
310 else
311 status(afp, sdl, ifa);
312 }
313 if (namesonly)
314 printf("\n");
315 freeifaddrs(ifap);
316
317 exit(0);
318}
319
320static struct afswtch *afs = NULL;
321
322void
323af_register(struct afswtch *p)
324{
325 p->af_next = afs;
326 afs = p;
327}
328
329static struct afswtch *
330af_getbyname(const char *name)
331{
332 struct afswtch *afp;
333
334 for (afp = afs; afp != NULL; afp = afp->af_next)
335 if (strcmp(afp->af_name, name) == 0)
336 return afp;
337 return NULL;
338}
339
340static struct afswtch *
341af_getbyfamily(int af)
342{
343 struct afswtch *afp;
344
345 for (afp = afs; afp != NULL; afp = afp->af_next)
346 if (afp->af_af == af)
347 return afp;
348 return NULL;
349}
350
351static void
352af_other_status(int s)
353{
354 struct afswtch *afp;
355 uint8_t afmask[howmany(AF_MAX, NBBY)];
356
357 memset(afmask, 0, sizeof(afmask));
358 for (afp = afs; afp != NULL; afp = afp->af_next) {
359 if (afp->af_other_status == NULL)
360 continue;
361 if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af))
362 continue;
363 afp->af_other_status(s);
364 setbit(afmask, afp->af_af);
365 }
366}
367
368static void
369af_all_tunnel_status(int s)
370{
371 struct afswtch *afp;
372 uint8_t afmask[howmany(AF_MAX, NBBY)];
373
374 memset(afmask, 0, sizeof(afmask));
375 for (afp = afs; afp != NULL; afp = afp->af_next) {
376 if (afp->af_status_tunnel == NULL)
377 continue;
378 if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af))
379 continue;
380 afp->af_status_tunnel(s);
381 setbit(afmask, afp->af_af);
382 }
383}
384
385static struct cmd *cmds = NULL;
386
387void
388cmd_register(struct cmd *p)
389{
390 p->c_next = cmds;
391 cmds = p;
392}
393
394static const struct cmd *
395cmd_lookup(const char *name)
396{
397#define N(a) (sizeof(a)/sizeof(a[0]))
398 const struct cmd *p;
399
400 for (p = cmds; p != NULL; p = p->c_next)
401 if (strcmp(name, p->c_name) == 0)
402 return p;
403 return NULL;
404#undef N
405}
406
407struct callback {
408 callback_func *cb_func;
409 void *cb_arg;
410 struct callback *cb_next;
411};
412static struct callback *callbacks = NULL;
413
414void
415callback_register(callback_func *func, void *arg)
416{
417 struct callback *cb;
418
419 cb = malloc(sizeof(struct callback));
420 if (cb == NULL)
421 errx(1, "unable to allocate memory for callback");
422 cb->cb_func = func;
423 cb->cb_arg = arg;
424 cb->cb_next = callbacks;
425 callbacks = cb;
426}
427
428/* specially-handled commands */
429static void setifaddr(const char *, int, int, const struct afswtch *);
430static const struct cmd setifaddr_cmd = DEF_CMD("ifaddr", 0, setifaddr);
431
432static void setifdstaddr(const char *, int, int, const struct afswtch *);
433static const struct cmd setifdstaddr_cmd =
434 DEF_CMD("ifdstaddr", 0, setifdstaddr);
435
436static int
437ifconfig(int argc, char *const *argv, int iscreate, const struct afswtch *afp)
438{
439 const struct afswtch *nafp;
440 struct callback *cb;
441 int s;
442
443 strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name);
444top:
445 if (afp == NULL)
446 afp = af_getbyname("inet");
447 ifr.ifr_addr.sa_family =
448 afp->af_af == AF_LINK || afp->af_af == AF_UNSPEC ?
449 AF_INET : afp->af_af;
450
451 if ((s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0)) < 0)
452 err(1, "socket(family %u,SOCK_DGRAM", ifr.ifr_addr.sa_family);
453
454 while (argc > 0) {
455 const struct cmd *p;
456
457 p = cmd_lookup(*argv);
458 if (p == NULL) {
459 /*
460 * Not a recognized command, choose between setting
461 * the interface address and the dst address.
462 */
463 p = (setaddr ? &setifdstaddr_cmd : &setifaddr_cmd);
464 }
465 if (p->c_u.c_func || p->c_u.c_func2) {
466 if (iscreate && !p->c_iscloneop) {
467 /*
468 * Push the clone create callback so the new
469 * device is created and can be used for any
470 * remaining arguments.
471 */
472 cb = callbacks;
473 if (cb == NULL)
474 errx(1, "internal error, no callback");
475 callbacks = cb->cb_next;
476 cb->cb_func(s, cb->cb_arg);
477 iscreate = 0;
478 /*
479 * Handle any address family spec that
480 * immediately follows and potentially
481 * recreate the socket.
482 */
483 nafp = af_getbyname(*argv);
484 if (nafp != NULL) {
485 argc--, argv++;
486 if (nafp != afp) {
487 close(s);
488 afp = nafp;
489 goto top;
490 }
491 }
492 }
493 if (p->c_parameter == NEXTARG) {
494 if (argv[1] == NULL)
495 errx(1, "'%s' requires argument",
496 p->c_name);
497 p->c_u.c_func(argv[1], 0, s, afp);
498 argc--, argv++;
499 } else if (p->c_parameter == OPTARG) {
500 p->c_u.c_func(argv[1], 0, s, afp);
501 if (argv[1] != NULL)
502 argc--, argv++;
503 } else if (p->c_parameter == NEXTARG2) {
504 if (argc < 3)
505 errx(1, "'%s' requires 2 arguments",
506 p->c_name);
507 p->c_u.c_func2(argv[1], argv[2], s, afp);
508 argc -= 2, argv += 2;
509 } else
510 p->c_u.c_func(*argv, p->c_parameter, s, afp);
511 }
512 argc--, argv++;
513 }
514
515 /*
516 * Do any post argument processing required by the address family.
517 */
518 if (afp->af_postproc != NULL)
519 afp->af_postproc(s, afp);
520 /*
521 * Do deferred callbacks registered while processing
522 * command-line arguments.
523 */
524 for (cb = callbacks; cb != NULL; cb = cb->cb_next)
525 cb->cb_func(s, cb->cb_arg);
526 /*
527 * Do deferred operations.
528 */
529 if (clearaddr) {
530 if (afp->af_ridreq == NULL || afp->af_difaddr == 0) {
531 warnx("interface %s cannot change %s addresses!",
532 name, afp->af_name);
533 clearaddr = 0;
534 }
535 }
536 if (clearaddr) {
537 int ret;
538 strncpy(afp->af_ridreq, name, sizeof ifr.ifr_name);
539 ret = ioctl(s, afp->af_difaddr, afp->af_ridreq);
540 if (ret < 0) {
541 if (errno == EADDRNOTAVAIL && (doalias >= 0)) {
542 /* means no previous address for interface */
543 } else
544 Perror("ioctl (SIOCDIFADDR)");
545 }
546 }
547 if (newaddr) {
548 if (afp->af_addreq == NULL || afp->af_aifaddr == 0) {
549 warnx("interface %s cannot change %s addresses!",
550 name, afp->af_name);
551 newaddr = 0;
552 }
553 }
554 if (newaddr && (setaddr || setmask)) {
555 strncpy(afp->af_addreq, name, sizeof ifr.ifr_name);
556 if (ioctl(s, afp->af_aifaddr, afp->af_addreq) < 0)
557 Perror("ioctl (SIOCAIFADDR)");
558 }
559
560 close(s);
561 return(0);
562}
563
564/*ARGSUSED*/
565static void
566setifaddr(const char *addr, int param, int s, const struct afswtch *afp)
567{
568 if (afp->af_getaddr == NULL)
569 return;
570 /*
571 * Delay the ioctl to set the interface addr until flags are all set.
572 * The address interpretation may depend on the flags,
573 * and the flags may change when the address is set.
574 */
575 setaddr++;
576 if (doalias == 0 && afp->af_af != AF_LINK)
577 clearaddr = 1;
578 afp->af_getaddr(addr, (doalias >= 0 ? ADDR : RIDADDR));
579}
580
581static void
582settunnel(const char *src, const char *dst, int s, const struct afswtch *afp)
583{
584 struct addrinfo *srcres, *dstres;
585 int ecode;
586
587 if (afp->af_settunnel == NULL) {
588 warn("address family %s does not support tunnel setup",
589 afp->af_name);
590 return;
591 }
592
593 if ((ecode = getaddrinfo(src, NULL, NULL, &srcres)) != 0)
594 errx(1, "error in parsing address string: %s",
595 gai_strerror(ecode));
596
597 if ((ecode = getaddrinfo(dst, NULL, NULL, &dstres)) != 0)
598 errx(1, "error in parsing address string: %s",
599 gai_strerror(ecode));
600
601 if (srcres->ai_addr->sa_family != dstres->ai_addr->sa_family)
602 errx(1,
603 "source and destination address families do not match");
604
605 afp->af_settunnel(s, srcres, dstres);
606
607 freeaddrinfo(srcres);
608 freeaddrinfo(dstres);
609}
610
611/* ARGSUSED */
612static void
613deletetunnel(const char *vname, int param, int s, const struct afswtch *afp)
614{
615
616 if (ioctl(s, SIOCDIFPHYADDR, &ifr) < 0)
617 err(1, "SIOCDIFPHYADDR");
618}
619
620static void
621setifnetmask(const char *addr, int dummy __unused, int s,
622 const struct afswtch *afp)
623{
624 if (afp->af_getaddr != NULL) {
625 setmask++;
626 afp->af_getaddr(addr, MASK);
627 }
628}
629
630static void
631setifbroadaddr(const char *addr, int dummy __unused, int s,
632 const struct afswtch *afp)
633{
634 if (afp->af_getaddr != NULL)
635 afp->af_getaddr(addr, DSTADDR);
636}
637
638static void
639setifipdst(const char *addr, int dummy __unused, int s,
640 const struct afswtch *afp)
641{
642 const struct afswtch *inet;
643
644 inet = af_getbyname("inet");
645 if (inet == NULL)
646 return;
647 inet->af_getaddr(addr, DSTADDR);
648 clearaddr = 0;
649 newaddr = 0;
650}
651
652static void
653notealias(const char *addr, int param, int s, const struct afswtch *afp)
654{
655#define rqtosa(x) (&(((struct ifreq *)(afp->x))->ifr_addr))
656 if (setaddr && doalias == 0 && param < 0)
657 if (afp->af_addreq != NULL && afp->af_ridreq != NULL)
658 bcopy((caddr_t)rqtosa(af_addreq),
659 (caddr_t)rqtosa(af_ridreq),
660 rqtosa(af_addreq)->sa_len);
661 doalias = param;
662 if (param < 0) {
663 clearaddr = 1;
664 newaddr = 0;
665 } else
666 clearaddr = 0;
667#undef rqtosa
668}
669
670/*ARGSUSED*/
671static void
672setifdstaddr(const char *addr, int param __unused, int s,
673 const struct afswtch *afp)
674{
675 if (afp->af_getaddr != NULL)
676 afp->af_getaddr(addr, DSTADDR);
677}
678
679/*
680 * Note: doing an SIOCIGIFFLAGS scribbles on the union portion
681 * of the ifreq structure, which may confuse other parts of ifconfig.
682 * Make a private copy so we can avoid that.
683 */
684static void
685setifflags(const char *vname, int value, int s, const struct afswtch *afp)
686{
687 struct ifreq my_ifr;
688 int flags;
689
690 bcopy((char *)&ifr, (char *)&my_ifr, sizeof(struct ifreq));
691
692 if (ioctl(s, SIOCGIFFLAGS, (caddr_t)&my_ifr) < 0) {
693 Perror("ioctl (SIOCGIFFLAGS)");
694 exit(1);
695 }
696 strncpy(my_ifr.ifr_name, name, sizeof (my_ifr.ifr_name));
697 flags = (my_ifr.ifr_flags & 0xffff) | (my_ifr.ifr_flagshigh << 16);
698
699 if (value < 0) {
700 value = -value;
701 flags &= ~value;
702 } else
703 flags |= value;
704 my_ifr.ifr_flags = flags & 0xffff;
705 my_ifr.ifr_flagshigh = flags >> 16;
706 if (ioctl(s, SIOCSIFFLAGS, (caddr_t)&my_ifr) < 0)
707 Perror(vname);
708}
709
710void
711setifcap(const char *vname, int value, int s, const struct afswtch *afp)
712{
713 int flags;
714
715 if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) < 0) {
716 Perror("ioctl (SIOCGIFCAP)");
717 exit(1);
718 }
719 flags = ifr.ifr_curcap;
720 if (value < 0) {
721 value = -value;
722 flags &= ~value;
723 } else
724 flags |= value;
725 flags &= ifr.ifr_reqcap;
726 ifr.ifr_reqcap = flags;
727 if (ioctl(s, SIOCSIFCAP, (caddr_t)&ifr) < 0)
728 Perror(vname);
729}
730
731static void
732setifmetric(const char *val, int dummy __unused, int s,
733 const struct afswtch *afp)
734{
735 strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
736 ifr.ifr_metric = atoi(val);
737 if (ioctl(s, SIOCSIFMETRIC, (caddr_t)&ifr) < 0)
738 warn("ioctl (set metric)");
739}
740
741static void
742setifmtu(const char *val, int dummy __unused, int s,
743 const struct afswtch *afp)
744{
745 strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
746 ifr.ifr_mtu = atoi(val);
747 if (ioctl(s, SIOCSIFMTU, (caddr_t)&ifr) < 0)
748 warn("ioctl (set mtu)");
749}
750
751static void
752setifname(const char *val, int dummy __unused, int s,
753 const struct afswtch *afp)
754{
755 char *newname;
756
757 newname = strdup(val);
758 if (newname == NULL) {
759 warn("no memory to set ifname");
760 return;
761 }
762 ifr.ifr_data = newname;
763 if (ioctl(s, SIOCSIFNAME, (caddr_t)&ifr) < 0) {
764 warn("ioctl (set name)");
765 free(newname);
766 return;
767 }
768 strlcpy(name, newname, sizeof(name));
769 free(newname);
770}
771
772#define IFFBITS \
773"\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT\6SMART\7RUNNING" \
774"\10NOARP\11PROMISC\12ALLMULTI\13OACTIVE\14SIMPLEX\15LINK0\16LINK1\17LINK2" \
775"\20MULTICAST\22PPROMISC\23MONITOR\24STATICARP\25NEEDSGIANT"
776
777#define IFCAPBITS \
778"\020\1RXCSUM\2TXCSUM\3NETCONS\4VLAN_MTU\5VLAN_HWTAGGING\6JUMBO_MTU\7POLLING" \
779"\10VLAN_HWCSUM\11TSO4\12TSO6\13LRO\14WOL_UCAST\15WOL_MCAST\16WOL_MAGIC"
780
781/*
782 * Print the status of the interface. If an address family was
783 * specified, show only it; otherwise, show them all.
784 */
785static void
786status(const struct afswtch *afp, const struct sockaddr_dl *sdl,
787 struct ifaddrs *ifa)
788{
789 struct ifaddrs *ift;
790 int allfamilies, s;
791 struct ifstat ifs;
792
793 if (afp == NULL) {
794 allfamilies = 1;
795 afp = af_getbyname("inet");
796 } else
797 allfamilies = 0;
798
799 ifr.ifr_addr.sa_family = afp->af_af == AF_LINK ? AF_INET : afp->af_af;
800 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
801
802 s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0);
803 if (s < 0)
804 err(1, "socket(family %u,SOCK_DGRAM)", ifr.ifr_addr.sa_family);
805
806 printf("%s: ", name);
807 printb("flags", ifa->ifa_flags, IFFBITS);
808 if (ioctl(s, SIOCGIFMETRIC, &ifr) != -1)
809 printf(" metric %d", ifr.ifr_metric);
810 if (ioctl(s, SIOCGIFMTU, &ifr) != -1)
811 printf(" mtu %d", ifr.ifr_mtu);
812 putchar('\n');
813
814 if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) == 0) {
815 if (ifr.ifr_curcap != 0) {
816 printb("\toptions", ifr.ifr_curcap, IFCAPBITS);
817 putchar('\n');
818 }
819 if (supmedia && ifr.ifr_reqcap != 0) {
820 printb("\tcapabilities", ifr.ifr_reqcap, IFCAPBITS);
821 putchar('\n');
822 }
823 }
824
825 tunnel_status(s);
826
827 for (ift = ifa; ift != NULL; ift = ift->ifa_next) {
828 if (ift->ifa_addr == NULL)
829 continue;
830 if (strcmp(ifa->ifa_name, ift->ifa_name) != 0)
831 continue;
832 if (allfamilies) {
833 const struct afswtch *p;
834 p = af_getbyfamily(ift->ifa_addr->sa_family);
835 if (p != NULL && p->af_status != NULL)
836 p->af_status(s, ift);
837 } else if (afp->af_af == ift->ifa_addr->sa_family)
838 afp->af_status(s, ift);
839 }
840#if 0
841 if (allfamilies || afp->af_af == AF_LINK) {
842 const struct afswtch *lafp;
843
844 /*
845 * Hack; the link level address is received separately
846 * from the routing information so any address is not
847 * handled above. Cobble together an entry and invoke
848 * the status method specially.
849 */
850 lafp = af_getbyname("lladdr");
851 if (lafp != NULL) {
852 info.rti_info[RTAX_IFA] = (struct sockaddr *)sdl;
853 lafp->af_status(s, &info);
854 }
855 }
856#endif
857 if (allfamilies)
858 af_other_status(s);
859 else if (afp->af_other_status != NULL)
860 afp->af_other_status(s);
861
862 strncpy(ifs.ifs_name, name, sizeof ifs.ifs_name);
863 if (ioctl(s, SIOCGIFSTATUS, &ifs) == 0)
864 printf("%s", ifs.ascii);
865
866 close(s);
867 return;
868}
869
870static void
871tunnel_status(int s)
872{
873 af_all_tunnel_status(s);
874}
875
876void
877Perror(const char *cmd)
878{
879 switch (errno) {
880
881 case ENXIO:
882 errx(1, "%s: no such interface", cmd);
883 break;
884
885 case EPERM:
886 errx(1, "%s: permission denied", cmd);
887 break;
888
889 default:
890 err(1, "%s", cmd);
891 }
892}
893
894/*
895 * Print a value a la the %b format of the kernel's printf
896 */
897void
898printb(const char *s, unsigned v, const char *bits)
899{
900 int i, any = 0;
901 char c;
902
903 if (bits && *bits == 8)
904 printf("%s=%o", s, v);
905 else
906 printf("%s=%x", s, v);
907 bits++;
908 if (bits) {
909 putchar('<');
910 while ((i = *bits++) != '\0') {
911 if (v & (1 << (i-1))) {
912 if (any)
913 putchar(',');
914 any = 1;
915 for (; (c = *bits) > 32; bits++)
916 putchar(c);
917 } else
918 for (; *bits > 32; bits++)
919 ;
920 }
921 putchar('>');
922 }
923}
924
925void
926ifmaybeload(const char *name)
927{
928#define MOD_PREFIX_LEN 3 /* "if_" */
929 struct module_stat mstat;
930 int fileid, modid;
931 char ifkind[IFNAMSIZ + MOD_PREFIX_LEN], ifname[IFNAMSIZ], *dp;
932 const char *cp;
933
934 /* loading suppressed by the user */
935 if (noload)
936 return;
937
938 /* trim the interface number off the end */
939 strlcpy(ifname, name, sizeof(ifname));
940 for (dp = ifname; *dp != 0; dp++)
941 if (isdigit(*dp)) {
942 *dp = 0;
943 break;
944 }
945
946 /* turn interface and unit into module name */
947 strcpy(ifkind, "if_");
948 strlcpy(ifkind + MOD_PREFIX_LEN, ifname,
949 sizeof(ifkind) - MOD_PREFIX_LEN);
950
951 /* scan files in kernel */
952 mstat.version = sizeof(struct module_stat);
953 for (fileid = kldnext(0); fileid > 0; fileid = kldnext(fileid)) {
954 /* scan modules in file */
955 for (modid = kldfirstmod(fileid); modid > 0;
956 modid = modfnext(modid)) {
957 if (modstat(modid, &mstat) < 0)
958 continue;
959 /* strip bus name if present */
960 if ((cp = strchr(mstat.name, '/')) != NULL) {
961 cp++;
962 } else {
963 cp = mstat.name;
964 }
965 /* already loaded? */
966 if (strncmp(ifname, cp, strlen(ifname) + 1) == 0 ||
967 strncmp(ifkind, cp, strlen(ifkind) + 1) == 0)
968 return;
969 }
970 }
971
972 /* not present, we should try to load it */
973 kldload(ifkind);
974}
975
976static struct cmd basic_cmds[] = {
977 DEF_CMD("up", IFF_UP, setifflags),
978 DEF_CMD("down", -IFF_UP, setifflags),
979 DEF_CMD("arp", -IFF_NOARP, setifflags),
980 DEF_CMD("-arp", IFF_NOARP, setifflags),
981 DEF_CMD("debug", IFF_DEBUG, setifflags),
982 DEF_CMD("-debug", -IFF_DEBUG, setifflags),
983 DEF_CMD("promisc", IFF_PPROMISC, setifflags),
984 DEF_CMD("-promisc", -IFF_PPROMISC, setifflags),
985 DEF_CMD("add", IFF_UP, notealias),
986 DEF_CMD("alias", IFF_UP, notealias),
987 DEF_CMD("-alias", -IFF_UP, notealias),
988 DEF_CMD("delete", -IFF_UP, notealias),
989 DEF_CMD("remove", -IFF_UP, notealias),
990#ifdef notdef
991#define EN_SWABIPS 0x1000
992 DEF_CMD("swabips", EN_SWABIPS, setifflags),
993 DEF_CMD("-swabips", -EN_SWABIPS, setifflags),
994#endif
995 DEF_CMD_ARG("netmask", setifnetmask),
996 DEF_CMD_ARG("metric", setifmetric),
997 DEF_CMD_ARG("broadcast", setifbroadaddr),
998 DEF_CMD_ARG("ipdst", setifipdst),
999 DEF_CMD_ARG2("tunnel", settunnel),
1000 DEF_CMD("-tunnel", 0, deletetunnel),
1001 DEF_CMD("deletetunnel", 0, deletetunnel),
1002 DEF_CMD("link0", IFF_LINK0, setifflags),
1003 DEF_CMD("-link0", -IFF_LINK0, setifflags),
1004 DEF_CMD("link1", IFF_LINK1, setifflags),
1005 DEF_CMD("-link1", -IFF_LINK1, setifflags),
1006 DEF_CMD("link2", IFF_LINK2, setifflags),
1007 DEF_CMD("-link2", -IFF_LINK2, setifflags),
1008 DEF_CMD("monitor", IFF_MONITOR, setifflags),
1009 DEF_CMD("-monitor", -IFF_MONITOR, setifflags),
1010 DEF_CMD("staticarp", IFF_STATICARP, setifflags),
1011 DEF_CMD("-staticarp", -IFF_STATICARP, setifflags),
1012 DEF_CMD("rxcsum", IFCAP_RXCSUM, setifcap),
1013 DEF_CMD("-rxcsum", -IFCAP_RXCSUM, setifcap),
1014 DEF_CMD("txcsum", IFCAP_TXCSUM, setifcap),
1015 DEF_CMD("-txcsum", -IFCAP_TXCSUM, setifcap),
1016 DEF_CMD("netcons", IFCAP_NETCONS, setifcap),
1017 DEF_CMD("-netcons", -IFCAP_NETCONS, setifcap),
1018 DEF_CMD("polling", IFCAP_POLLING, setifcap),
1019 DEF_CMD("-polling", -IFCAP_POLLING, setifcap),
1020 DEF_CMD("tso", IFCAP_TSO, setifcap),
1021 DEF_CMD("-tso", -IFCAP_TSO, setifcap),
1022 DEF_CMD("lro", IFCAP_LRO, setifcap),
1023 DEF_CMD("-lro", -IFCAP_LRO, setifcap),
1024 DEF_CMD("wol", IFCAP_WOL, setifcap),
1025 DEF_CMD("-wol", -IFCAP_WOL, setifcap),
1026 DEF_CMD("wol_ucast", IFCAP_WOL_UCAST, setifcap),
1027 DEF_CMD("-wol_ucast", -IFCAP_WOL_UCAST, setifcap),
1028 DEF_CMD("wol_mcast", IFCAP_WOL_MCAST, setifcap),
1029 DEF_CMD("-wol_mcast", -IFCAP_WOL_MCAST, setifcap),
1030 DEF_CMD("wol_magic", IFCAP_WOL_MAGIC, setifcap),
1031 DEF_CMD("-wol_magic", -IFCAP_WOL_MAGIC, setifcap),
1032 DEF_CMD("normal", -IFF_LINK0, setifflags),
1033 DEF_CMD("compress", IFF_LINK0, setifflags),
1034 DEF_CMD("noicmp", IFF_LINK1, setifflags),
1035 DEF_CMD_ARG("mtu", setifmtu),
1036 DEF_CMD_ARG("name", setifname),
1037};
1038
1039static __constructor void
1040ifconfig_ctor(void)
1041{
1042#define N(a) (sizeof(a) / sizeof(a[0]))
1043 int i;
1044
1045 for (i = 0; i < N(basic_cmds); i++)
1046 cmd_register(&basic_cmds[i]);
1047#undef N
1048}