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 179894 2008-06-20 17:26:34Z 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_gre.h>
55#include <net/if_var.h>
56#include <net/if_dl.h>
57#include <net/if_types.h>
58#include <net/route.h>
59
60/* IP */
61#include <netinet/in.h>
62#include <netinet/in_var.h>
63#include <arpa/inet.h>
64#include <netdb.h>
65
66#include <ifaddrs.h>
67#include <ctype.h>
68#include <err.h>
69#include <errno.h>
70#include <fcntl.h>
71#include <stdio.h>
72#include <stdlib.h>
73#include <string.h>
74#include <unistd.h>
75
76#include "ifconfig.h"
77
78/*
79 * Since "struct ifreq" is composed of various union members, callers
80 * should pay special attention to interprete the value.
81 * (.e.g. little/big endian difference in the structure.)
82 */
83struct ifreq ifr;
84
85char name[IFNAMSIZ];
86int setaddr;
87int setmask;
88int doalias;
89int clearaddr;
90int newaddr = 1;
91int verbose;
92int noload;
93
94int supmedia = 0;
95int printkeys = 0; /* Print keying material for interfaces. */
96
97static int ifconfig(int argc, char *const *argv, int iscreate,
98 const struct afswtch *afp);
99static void status(const struct afswtch *afp, const struct sockaddr_dl *sdl,
100 struct ifaddrs *ifa);
101static void tunnel_status(int s);
102static void usage(void);
103
104static struct afswtch *af_getbyname(const char *name);
105static struct afswtch *af_getbyfamily(int af);
106static void af_other_status(int);
107
108static struct option *opts = NULL;
109
110void
111opt_register(struct option *p)
112{
113 p->next = opts;
114 opts = p;
115}
116
117static void
118usage(void)
119{
120 char options[1024];
121 struct option *p;
122
123 /* XXX not right but close enough for now */
124 options[0] = '\0';
125 for (p = opts; p != NULL; p = p->next) {
126 strlcat(options, p->opt_usage, sizeof(options));
127 strlcat(options, " ", sizeof(options));
128 }
129
130 fprintf(stderr,
131 "usage: ifconfig %sinterface address_family [address [dest_address]]\n"
132 " [parameters]\n"
133 " ifconfig interface create\n"
134 " ifconfig -a %s[-d] [-m] [-u] [-v] [address_family]\n"
135 " ifconfig -l [-d] [-u] [address_family]\n"
136 " ifconfig %s[-d] [-m] [-u] [-v]\n",
137 options, options, options);
138 exit(1);
139}
140
141int
142main(int argc, char *argv[])
143{
144 int c, all, namesonly, downonly, uponly;
145 const struct afswtch *afp = NULL;
146 int ifindex;
147 struct ifaddrs *ifap, *ifa;
148 struct ifreq paifr;
149 const struct sockaddr_dl *sdl;
150 char options[1024], *cp;
151 const char *ifname;
152 struct option *p;
153 size_t iflen;
154
155 all = downonly = uponly = namesonly = noload = verbose = 0;
156
157 /* Parse leading line options */
158 strlcpy(options, "adklmnuv", sizeof(options));
159 for (p = opts; p != NULL; p = p->next)
160 strlcat(options, p->opt, sizeof(options));
161 while ((c = getopt(argc, argv, options)) != -1) {
162 switch (c) {
163 case 'a': /* scan all interfaces */
164 all++;
165 break;
166 case 'd': /* restrict scan to "down" interfaces */
167 downonly++;
168 break;
169 case 'k':
170 printkeys++;
171 break;
172 case 'l': /* scan interface names only */
173 namesonly++;
174 break;
175 case 'm': /* show media choices in status */
176 supmedia = 1;
177 break;
178 case 'n': /* suppress module loading */
179 noload++;
180 break;
181 case 'u': /* restrict scan to "up" interfaces */
182 uponly++;
183 break;
184 case 'v':
185 verbose++;
186 break;
187 default:
188 for (p = opts; p != NULL; p = p->next)
189 if (p->opt[0] == c) {
190 p->cb(optarg);
191 break;
192 }
193 if (p == NULL)
194 usage();
195 break;
196 }
197 }
198 argc -= optind;
199 argv += optind;
200
201 /* -l cannot be used with -a or -m */
202 if (namesonly && (all || supmedia))
203 usage();
204
205 /* nonsense.. */
206 if (uponly && downonly)
207 usage();
208
209 /* no arguments is equivalent to '-a' */
210 if (!namesonly && argc < 1)
211 all = 1;
212
213 /* -a and -l allow an address family arg to limit the output */
214 if (all || namesonly) {
215 if (argc > 1)
216 usage();
217
218 ifname = NULL;
219 ifindex = 0;
220 if (argc == 1) {
221 afp = af_getbyname(*argv);
222 if (afp == NULL)
223 usage();
224 if (afp->af_name != NULL)
225 argc--, argv++;
226 /* leave with afp non-zero */
227 }
228 } else {
229 /* not listing, need an argument */
230 if (argc < 1)
231 usage();
232
233 ifname = *argv;
234 argc--, argv++;
235
236 /* check and maybe load support for this interface */
237 ifmaybeload(ifname);
238
239 ifindex = if_nametoindex(ifname);
240 if (ifindex == 0) {
241 /*
242 * NOTE: We must special-case the `create' command
243 * right here as we would otherwise fail when trying
244 * to find the interface.
245 */
246 if (argc > 0 && (strcmp(argv[0], "create") == 0 ||
247 strcmp(argv[0], "plumb") == 0)) {
248 iflen = strlcpy(name, ifname, sizeof(name));
249 if (iflen >= sizeof(name))
250 errx(1, "%s: cloning name too long",
251 ifname);
252 ifconfig(argc, argv, 1, NULL);
253 exit(0);
254 }
255 errx(1, "interface %s does not exist", ifname);
256 }
257 }
258
259 /* Check for address family */
260 if (argc > 0) {
261 afp = af_getbyname(*argv);
262 if (afp != NULL)
263 argc--, argv++;
264 }
265
266 if (getifaddrs(&ifap) != 0)
267 err(EXIT_FAILURE, "getifaddrs");
268 cp = NULL;
269 ifindex = 0;
270 for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
271 memset(&paifr, 0, sizeof(paifr));
272 strncpy(paifr.ifr_name, ifa->ifa_name, sizeof(paifr.ifr_name));
273 if (sizeof(paifr.ifr_addr) >= ifa->ifa_addr->sa_len) {
274 memcpy(&paifr.ifr_addr, ifa->ifa_addr,
275 ifa->ifa_addr->sa_len);
276 }
277
278 if (ifname != NULL && strcmp(ifname, ifa->ifa_name) != 0)
279 continue;
280 if (ifa->ifa_addr->sa_family == AF_LINK)
281 sdl = (const struct sockaddr_dl *) ifa->ifa_addr;
282 else
283 sdl = NULL;
284 if (cp != NULL && strcmp(cp, ifa->ifa_name) == 0)
285 continue;
286 iflen = strlcpy(name, ifa->ifa_name, sizeof(name));
287 if (iflen >= sizeof(name)) {
288 warnx("%s: interface name too long, skipping",
289 ifa->ifa_name);
290 continue;
291 }
292 cp = ifa->ifa_name;
293
294 if (downonly && (ifa->ifa_flags & IFF_UP) != 0)
295 continue;
296 if (uponly && (ifa->ifa_flags & IFF_UP) == 0)
297 continue;
298 ifindex++;
299 /*
300 * Are we just listing the interfaces?
301 */
302 if (namesonly) {
303 if (ifindex > 1)
304 printf(" ");
305 fputs(name, stdout);
306 continue;
307 }
308
309 if (argc > 0)
310 ifconfig(argc, argv, 0, afp);
311 else
312 status(afp, sdl, ifa);
313 }
314 if (namesonly)
315 printf("\n");
316 freeifaddrs(ifap);
317
318 exit(0);
319}
320
321static struct afswtch *afs = NULL;
322
323void
324af_register(struct afswtch *p)
325{
326 p->af_next = afs;
327 afs = p;
328}
329
330static struct afswtch *
331af_getbyname(const char *name)
332{
333 struct afswtch *afp;
334
335 for (afp = afs; afp != NULL; afp = afp->af_next)
336 if (strcmp(afp->af_name, name) == 0)
337 return afp;
338 return NULL;
339}
340
341static struct afswtch *
342af_getbyfamily(int af)
343{
344 struct afswtch *afp;
345
346 for (afp = afs; afp != NULL; afp = afp->af_next)
347 if (afp->af_af == af)
348 return afp;
349 return NULL;
350}
351
352static void
353af_other_status(int s)
354{
355 struct afswtch *afp;
356 uint8_t afmask[howmany(AF_MAX, NBBY)];
357
358 memset(afmask, 0, sizeof(afmask));
359 for (afp = afs; afp != NULL; afp = afp->af_next) {
360 if (afp->af_other_status == NULL)
361 continue;
362 if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af))
363 continue;
364 afp->af_other_status(s);
365 setbit(afmask, afp->af_af);
366 }
367}
368
369static void
370af_all_tunnel_status(int s)
371{
372 struct afswtch *afp;
373 uint8_t afmask[howmany(AF_MAX, NBBY)];
374
375 memset(afmask, 0, sizeof(afmask));
376 for (afp = afs; afp != NULL; afp = afp->af_next) {
377 if (afp->af_status_tunnel == NULL)
378 continue;
379 if (afp->af_af != AF_UNSPEC && isset(afmask, afp->af_af))
380 continue;
381 afp->af_status_tunnel(s);
382 setbit(afmask, afp->af_af);
383 }
384}
385
386static struct cmd *cmds = NULL;
387
388void
389cmd_register(struct cmd *p)
390{
391 p->c_next = cmds;
392 cmds = p;
393}
394
395static const struct cmd *
396cmd_lookup(const char *name)
397{
398#define N(a) (sizeof(a)/sizeof(a[0]))
399 const struct cmd *p;
400
401 for (p = cmds; p != NULL; p = p->c_next)
402 if (strcmp(name, p->c_name) == 0)
403 return p;
404 return NULL;
405#undef N
406}
407
408struct callback {
409 callback_func *cb_func;
410 void *cb_arg;
411 struct callback *cb_next;
412};
413static struct callback *callbacks = NULL;
414
415void
416callback_register(callback_func *func, void *arg)
417{
418 struct callback *cb;
419
420 cb = malloc(sizeof(struct callback));
421 if (cb == NULL)
422 errx(1, "unable to allocate memory for callback");
423 cb->cb_func = func;
424 cb->cb_arg = arg;
425 cb->cb_next = callbacks;
426 callbacks = cb;
427}
428
429/* specially-handled commands */
430static void setifaddr(const char *, int, int, const struct afswtch *);
431static const struct cmd setifaddr_cmd = DEF_CMD("ifaddr", 0, setifaddr);
432
433static void setifdstaddr(const char *, int, int, const struct afswtch *);
434static const struct cmd setifdstaddr_cmd =
435 DEF_CMD("ifdstaddr", 0, setifdstaddr);
436
437static int
438ifconfig(int argc, char *const *argv, int iscreate, const struct afswtch *afp)
439{
440 const struct afswtch *nafp;
441 struct callback *cb;
442 int s;
443
444 strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name);
445top:
446 if (afp == NULL)
447 afp = af_getbyname("inet");
448 ifr.ifr_addr.sa_family =
449 afp->af_af == AF_LINK || afp->af_af == AF_UNSPEC ?
450 AF_INET : afp->af_af;
451
452 if ((s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0)) < 0)
453 err(1, "socket(family %u,SOCK_DGRAM", ifr.ifr_addr.sa_family);
454
455 while (argc > 0) {
456 const struct cmd *p;
457
458 p = cmd_lookup(*argv);
459 if (p == NULL) {
460 /*
461 * Not a recognized command, choose between setting
462 * the interface address and the dst address.
463 */
464 p = (setaddr ? &setifdstaddr_cmd : &setifaddr_cmd);
465 }
466 if (p->c_u.c_func || p->c_u.c_func2) {
467 if (iscreate && !p->c_iscloneop) {
468 /*
469 * Push the clone create callback so the new
470 * device is created and can be used for any
471 * remaining arguments.
472 */
473 cb = callbacks;
474 if (cb == NULL)
475 errx(1, "internal error, no callback");
476 callbacks = cb->cb_next;
477 cb->cb_func(s, cb->cb_arg);
478 iscreate = 0;
479 /*
480 * Handle any address family spec that
481 * immediately follows and potentially
482 * recreate the socket.
483 */
484 nafp = af_getbyname(*argv);
485 if (nafp != NULL) {
486 argc--, argv++;
487 if (nafp != afp) {
488 close(s);
489 afp = nafp;
490 goto top;
491 }
492 }
493 }
494 if (p->c_parameter == NEXTARG) {
495 if (argv[1] == NULL)
496 errx(1, "'%s' requires argument",
497 p->c_name);
498 p->c_u.c_func(argv[1], 0, s, afp);
499 argc--, argv++;
500 } else if (p->c_parameter == OPTARG) {
501 p->c_u.c_func(argv[1], 0, s, afp);
502 if (argv[1] != NULL)
503 argc--, argv++;
504 } else if (p->c_parameter == NEXTARG2) {
505 if (argc < 3)
506 errx(1, "'%s' requires 2 arguments",
507 p->c_name);
508 p->c_u.c_func2(argv[1], argv[2], s, afp);
509 argc -= 2, argv += 2;
510 } else
511 p->c_u.c_func(*argv, p->c_parameter, s, afp);
512 }
513 argc--, argv++;
514 }
515
516 /*
517 * Do any post argument processing required by the address family.
518 */
519 if (afp->af_postproc != NULL)
520 afp->af_postproc(s, afp);
521 /*
522 * Do deferred callbacks registered while processing
523 * command-line arguments.
524 */
525 for (cb = callbacks; cb != NULL; cb = cb->cb_next)
526 cb->cb_func(s, cb->cb_arg);
527 /*
528 * Do deferred operations.
529 */
530 if (clearaddr) {
531 if (afp->af_ridreq == NULL || afp->af_difaddr == 0) {
532 warnx("interface %s cannot change %s addresses!",
533 name, afp->af_name);
534 clearaddr = 0;
535 }
536 }
537 if (clearaddr) {
538 int ret;
539 strncpy(afp->af_ridreq, name, sizeof ifr.ifr_name);
540 ret = ioctl(s, afp->af_difaddr, afp->af_ridreq);
541 if (ret < 0) {
542 if (errno == EADDRNOTAVAIL && (doalias >= 0)) {
543 /* means no previous address for interface */
544 } else
545 Perror("ioctl (SIOCDIFADDR)");
546 }
547 }
548 if (newaddr) {
549 if (afp->af_addreq == NULL || afp->af_aifaddr == 0) {
550 warnx("interface %s cannot change %s addresses!",
551 name, afp->af_name);
552 newaddr = 0;
553 }
554 }
555 if (newaddr && (setaddr || setmask)) {
556 strncpy(afp->af_addreq, name, sizeof ifr.ifr_name);
557 if (ioctl(s, afp->af_aifaddr, afp->af_addreq) < 0)
558 Perror("ioctl (SIOCAIFADDR)");
559 }
560
561 close(s);
562 return(0);
563}
564
565/*ARGSUSED*/
566static void
567setifaddr(const char *addr, int param, int s, const struct afswtch *afp)
568{
569 if (afp->af_getaddr == NULL)
570 return;
571 /*
572 * Delay the ioctl to set the interface addr until flags are all set.
573 * The address interpretation may depend on the flags,
574 * and the flags may change when the address is set.
575 */
576 setaddr++;
577 if (doalias == 0 && afp->af_af != AF_LINK)
578 clearaddr = 1;
579 afp->af_getaddr(addr, (doalias >= 0 ? ADDR : RIDADDR));
580}
581
582static void
583settunnel(const char *src, const char *dst, int s, const struct afswtch *afp)
584{
585 struct addrinfo *srcres, *dstres;
586 int ecode;
587
588 if (afp->af_settunnel == NULL) {
589 warn("address family %s does not support tunnel setup",
590 afp->af_name);
591 return;
592 }
593
594 if ((ecode = getaddrinfo(src, NULL, NULL, &srcres)) != 0)
595 errx(1, "error in parsing address string: %s",
596 gai_strerror(ecode));
597
598 if ((ecode = getaddrinfo(dst, NULL, NULL, &dstres)) != 0)
599 errx(1, "error in parsing address string: %s",
600 gai_strerror(ecode));
601
602 if (srcres->ai_addr->sa_family != dstres->ai_addr->sa_family)
603 errx(1,
604 "source and destination address families do not match");
605
606 afp->af_settunnel(s, srcres, dstres);
607
608 freeaddrinfo(srcres);
609 freeaddrinfo(dstres);
610}
611
612/* ARGSUSED */
613static void
614deletetunnel(const char *vname, int param, int s, const struct afswtch *afp)
615{
616
617 if (ioctl(s, SIOCDIFPHYADDR, &ifr) < 0)
618 err(1, "SIOCDIFPHYADDR");
619}
620
621static void
622setifnetmask(const char *addr, int dummy __unused, int s,
623 const struct afswtch *afp)
624{
625 if (afp->af_getaddr != NULL) {
626 setmask++;
627 afp->af_getaddr(addr, MASK);
628 }
629}
630
631static void
632setifbroadaddr(const char *addr, int dummy __unused, int s,
633 const struct afswtch *afp)
634{
635 if (afp->af_getaddr != NULL)
636 afp->af_getaddr(addr, DSTADDR);
637}
638
639static void
640setifipdst(const char *addr, int dummy __unused, int s,
641 const struct afswtch *afp)
642{
643 const struct afswtch *inet;
644
645 inet = af_getbyname("inet");
646 if (inet == NULL)
647 return;
648 inet->af_getaddr(addr, DSTADDR);
649 clearaddr = 0;
650 newaddr = 0;
651}
652
653static void
654notealias(const char *addr, int param, int s, const struct afswtch *afp)
655{
656#define rqtosa(x) (&(((struct ifreq *)(afp->x))->ifr_addr))
657 if (setaddr && doalias == 0 && param < 0)
658 if (afp->af_addreq != NULL && afp->af_ridreq != NULL)
659 bcopy((caddr_t)rqtosa(af_addreq),
660 (caddr_t)rqtosa(af_ridreq),
661 rqtosa(af_addreq)->sa_len);
662 doalias = param;
663 if (param < 0) {
664 clearaddr = 1;
665 newaddr = 0;
666 } else
667 clearaddr = 0;
668#undef rqtosa
669}
670
671/*ARGSUSED*/
672static void
673setifdstaddr(const char *addr, int param __unused, int s,
674 const struct afswtch *afp)
675{
676 if (afp->af_getaddr != NULL)
677 afp->af_getaddr(addr, DSTADDR);
678}
679
680/*
681 * Note: doing an SIOCIGIFFLAGS scribbles on the union portion
682 * of the ifreq structure, which may confuse other parts of ifconfig.
683 * Make a private copy so we can avoid that.
684 */
685static void
686setifflags(const char *vname, int value, int s, const struct afswtch *afp)
687{
688 struct ifreq my_ifr;
689 int flags;
690
691 bcopy((char *)&ifr, (char *)&my_ifr, sizeof(struct ifreq));
692
693 if (ioctl(s, SIOCGIFFLAGS, (caddr_t)&my_ifr) < 0) {
694 Perror("ioctl (SIOCGIFFLAGS)");
695 exit(1);
696 }
697 strncpy(my_ifr.ifr_name, name, sizeof (my_ifr.ifr_name));
698 flags = (my_ifr.ifr_flags & 0xffff) | (my_ifr.ifr_flagshigh << 16);
699
700 if (value < 0) {
701 value = -value;
702 flags &= ~value;
703 } else
704 flags |= value;
705 my_ifr.ifr_flags = flags & 0xffff;
706 my_ifr.ifr_flagshigh = flags >> 16;
707 if (ioctl(s, SIOCSIFFLAGS, (caddr_t)&my_ifr) < 0)
708 Perror(vname);
709}
710
711void
712setifcap(const char *vname, int value, int s, const struct afswtch *afp)
713{
714 int flags;
715
716 if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) < 0) {
717 Perror("ioctl (SIOCGIFCAP)");
718 exit(1);
719 }
720 flags = ifr.ifr_curcap;
721 if (value < 0) {
722 value = -value;
723 flags &= ~value;
724 } else
725 flags |= value;
726 flags &= ifr.ifr_reqcap;
727 ifr.ifr_reqcap = flags;
728 if (ioctl(s, SIOCSIFCAP, (caddr_t)&ifr) < 0)
729 Perror(vname);
730}
731
732static void
733setifmetric(const char *val, int dummy __unused, int s,
734 const struct afswtch *afp)
735{
736 strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
737 ifr.ifr_metric = atoi(val);
738 if (ioctl(s, SIOCSIFMETRIC, (caddr_t)&ifr) < 0)
739 warn("ioctl (set metric)");
740}
741
742static void
743setifmtu(const char *val, int dummy __unused, int s,
744 const struct afswtch *afp)
745{
746 strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
747 ifr.ifr_mtu = atoi(val);
748 if (ioctl(s, SIOCSIFMTU, (caddr_t)&ifr) < 0)
749 warn("ioctl (set mtu)");
750}
751
752static void
753setifgrekey(const char *val, int dummy __unused, int s,
754 const struct afswtch *afp)
755{
756 uint32_t grekey = atol(val);
757
758 strncpy(ifr.ifr_name, name, sizeof (ifr.ifr_name));
759 ifr.ifr_data = (caddr_t)&grekey;
760 if (ioctl(s, GRESKEY, (caddr_t)&ifr) < 0)
761 warn("ioctl (set grekey)");
762}
763
764static void
765setifname(const char *val, int dummy __unused, int s,
766 const struct afswtch *afp)
767{
768 char *newname;
769
770 newname = strdup(val);
771 if (newname == NULL) {
772 warn("no memory to set ifname");
773 return;
774 }
775 ifr.ifr_data = newname;
776 if (ioctl(s, SIOCSIFNAME, (caddr_t)&ifr) < 0) {
777 warn("ioctl (set name)");
778 free(newname);
779 return;
780 }
781 strlcpy(name, newname, sizeof(name));
782 free(newname);
783}
784
785#define IFFBITS \
786"\020\1UP\2BROADCAST\3DEBUG\4LOOPBACK\5POINTOPOINT\6SMART\7RUNNING" \
787"\10NOARP\11PROMISC\12ALLMULTI\13OACTIVE\14SIMPLEX\15LINK0\16LINK1\17LINK2" \
788"\20MULTICAST\22PPROMISC\23MONITOR\24STATICARP\25NEEDSGIANT"
789
790#define IFCAPBITS \
791"\020\1RXCSUM\2TXCSUM\3NETCONS\4VLAN_MTU\5VLAN_HWTAGGING\6JUMBO_MTU\7POLLING" \
792"\10VLAN_HWCSUM\11TSO4\12TSO6\13LRO\14WOL_UCAST\15WOL_MCAST\16WOL_MAGIC"
793
794/*
795 * Print the status of the interface. If an address family was
796 * specified, show only it; otherwise, show them all.
797 */
798static void
799status(const struct afswtch *afp, const struct sockaddr_dl *sdl,
800 struct ifaddrs *ifa)
801{
802 struct ifaddrs *ift;
803 int allfamilies, s;
804 struct ifstat ifs;
805
806 if (afp == NULL) {
807 allfamilies = 1;
808 afp = af_getbyname("inet");
809 } else
810 allfamilies = 0;
811
812 ifr.ifr_addr.sa_family = afp->af_af == AF_LINK ? AF_INET : afp->af_af;
813 strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
814
815 s = socket(ifr.ifr_addr.sa_family, SOCK_DGRAM, 0);
816 if (s < 0)
817 err(1, "socket(family %u,SOCK_DGRAM)", ifr.ifr_addr.sa_family);
818
819 printf("%s: ", name);
820 printb("flags", ifa->ifa_flags, IFFBITS);
821 if (ioctl(s, SIOCGIFMETRIC, &ifr) != -1)
822 printf(" metric %d", ifr.ifr_metric);
823 if (ioctl(s, SIOCGIFMTU, &ifr) != -1)
824 printf(" mtu %d", ifr.ifr_mtu);
825 putchar('\n');
826
827 if (ioctl(s, SIOCGIFCAP, (caddr_t)&ifr) == 0) {
828 if (ifr.ifr_curcap != 0) {
829 printb("\toptions", ifr.ifr_curcap, IFCAPBITS);
830 putchar('\n');
831 }
832 if (supmedia && ifr.ifr_reqcap != 0) {
833 printb("\tcapabilities", ifr.ifr_reqcap, IFCAPBITS);
834 putchar('\n');
835 }
836 }
837
838 tunnel_status(s);
839
840 for (ift = ifa; ift != NULL; ift = ift->ifa_next) {
841 if (ift->ifa_addr == NULL)
842 continue;
843 if (strcmp(ifa->ifa_name, ift->ifa_name) != 0)
844 continue;
845 if (allfamilies) {
846 const struct afswtch *p;
847 p = af_getbyfamily(ift->ifa_addr->sa_family);
848 if (p != NULL && p->af_status != NULL)
849 p->af_status(s, ift);
850 } else if (afp->af_af == ift->ifa_addr->sa_family)
851 afp->af_status(s, ift);
852 }
853#if 0
854 if (allfamilies || afp->af_af == AF_LINK) {
855 const struct afswtch *lafp;
856
857 /*
858 * Hack; the link level address is received separately
859 * from the routing information so any address is not
860 * handled above. Cobble together an entry and invoke
861 * the status method specially.
862 */
863 lafp = af_getbyname("lladdr");
864 if (lafp != NULL) {
865 info.rti_info[RTAX_IFA] = (struct sockaddr *)sdl;
866 lafp->af_status(s, &info);
867 }
868 }
869#endif
870 if (allfamilies)
871 af_other_status(s);
872 else if (afp->af_other_status != NULL)
873 afp->af_other_status(s);
874
875 strncpy(ifs.ifs_name, name, sizeof ifs.ifs_name);
876 if (ioctl(s, SIOCGIFSTATUS, &ifs) == 0)
877 printf("%s", ifs.ascii);
878
879 int grekey = 0;
880 ifr.ifr_data = (caddr_t)&grekey;
881 if (ioctl(s, GREGKEY, &ifr) == 0)
882 if (grekey != 0)
883 printf("\tgrekey: %d\n", grekey);
884
885 close(s);
886 return;
887}
888
889static void
890tunnel_status(int s)
891{
892 af_all_tunnel_status(s);
893}
894
895void
896Perror(const char *cmd)
897{
898 switch (errno) {
899
900 case ENXIO:
901 errx(1, "%s: no such interface", cmd);
902 break;
903
904 case EPERM:
905 errx(1, "%s: permission denied", cmd);
906 break;
907
908 default:
909 err(1, "%s", cmd);
910 }
911}
912
913/*
914 * Print a value a la the %b format of the kernel's printf
915 */
916void
917printb(const char *s, unsigned v, const char *bits)
918{
919 int i, any = 0;
920 char c;
921
922 if (bits && *bits == 8)
923 printf("%s=%o", s, v);
924 else
925 printf("%s=%x", s, v);
926 bits++;
927 if (bits) {
928 putchar('<');
929 while ((i = *bits++) != '\0') {
930 if (v & (1 << (i-1))) {
931 if (any)
932 putchar(',');
933 any = 1;
934 for (; (c = *bits) > 32; bits++)
935 putchar(c);
936 } else
937 for (; *bits > 32; bits++)
938 ;
939 }
940 putchar('>');
941 }
942}
943
944void
945ifmaybeload(const char *name)
946{
947#define MOD_PREFIX_LEN 3 /* "if_" */
948 struct module_stat mstat;
949 int fileid, modid;
950 char ifkind[IFNAMSIZ + MOD_PREFIX_LEN], ifname[IFNAMSIZ], *dp;
951 const char *cp;
952
953 /* loading suppressed by the user */
954 if (noload)
955 return;
956
957 /* trim the interface number off the end */
958 strlcpy(ifname, name, sizeof(ifname));
959 for (dp = ifname; *dp != 0; dp++)
960 if (isdigit(*dp)) {
961 *dp = 0;
962 break;
963 }
964
965 /* turn interface and unit into module name */
966 strcpy(ifkind, "if_");
967 strlcpy(ifkind + MOD_PREFIX_LEN, ifname,
968 sizeof(ifkind) - MOD_PREFIX_LEN);
969
970 /* scan files in kernel */
971 mstat.version = sizeof(struct module_stat);
972 for (fileid = kldnext(0); fileid > 0; fileid = kldnext(fileid)) {
973 /* scan modules in file */
974 for (modid = kldfirstmod(fileid); modid > 0;
975 modid = modfnext(modid)) {
976 if (modstat(modid, &mstat) < 0)
977 continue;
978 /* strip bus name if present */
979 if ((cp = strchr(mstat.name, '/')) != NULL) {
980 cp++;
981 } else {
982 cp = mstat.name;
983 }
984 /* already loaded? */
985 if (strncmp(ifname, cp, strlen(ifname) + 1) == 0 ||
986 strncmp(ifkind, cp, strlen(ifkind) + 1) == 0)
987 return;
988 }
989 }
990
991 /* not present, we should try to load it */
992 kldload(ifkind);
993}
994
995static struct cmd basic_cmds[] = {
996 DEF_CMD("up", IFF_UP, setifflags),
997 DEF_CMD("down", -IFF_UP, setifflags),
998 DEF_CMD("arp", -IFF_NOARP, setifflags),
999 DEF_CMD("-arp", IFF_NOARP, setifflags),
1000 DEF_CMD("debug", IFF_DEBUG, setifflags),
1001 DEF_CMD("-debug", -IFF_DEBUG, setifflags),
1002 DEF_CMD("promisc", IFF_PPROMISC, setifflags),
1003 DEF_CMD("-promisc", -IFF_PPROMISC, setifflags),
1004 DEF_CMD("add", IFF_UP, notealias),
1005 DEF_CMD("alias", IFF_UP, notealias),
1006 DEF_CMD("-alias", -IFF_UP, notealias),
1007 DEF_CMD("delete", -IFF_UP, notealias),
1008 DEF_CMD("remove", -IFF_UP, notealias),
1009#ifdef notdef
1010#define EN_SWABIPS 0x1000
1011 DEF_CMD("swabips", EN_SWABIPS, setifflags),
1012 DEF_CMD("-swabips", -EN_SWABIPS, setifflags),
1013#endif
1014 DEF_CMD_ARG("netmask", setifnetmask),
1015 DEF_CMD_ARG("metric", setifmetric),
1016 DEF_CMD_ARG("broadcast", setifbroadaddr),
1017 DEF_CMD_ARG("ipdst", setifipdst),
1018 DEF_CMD_ARG2("tunnel", settunnel),
1019 DEF_CMD("-tunnel", 0, deletetunnel),
1020 DEF_CMD("deletetunnel", 0, deletetunnel),
1021 DEF_CMD("link0", IFF_LINK0, setifflags),
1022 DEF_CMD("-link0", -IFF_LINK0, setifflags),
1023 DEF_CMD("link1", IFF_LINK1, setifflags),
1024 DEF_CMD("-link1", -IFF_LINK1, setifflags),
1025 DEF_CMD("link2", IFF_LINK2, setifflags),
1026 DEF_CMD("-link2", -IFF_LINK2, setifflags),
1027 DEF_CMD("monitor", IFF_MONITOR, setifflags),
1028 DEF_CMD("-monitor", -IFF_MONITOR, setifflags),
1029 DEF_CMD("staticarp", IFF_STATICARP, setifflags),
1030 DEF_CMD("-staticarp", -IFF_STATICARP, setifflags),
1031 DEF_CMD("rxcsum", IFCAP_RXCSUM, setifcap),
1032 DEF_CMD("-rxcsum", -IFCAP_RXCSUM, setifcap),
1033 DEF_CMD("txcsum", IFCAP_TXCSUM, setifcap),
1034 DEF_CMD("-txcsum", -IFCAP_TXCSUM, setifcap),
1035 DEF_CMD("netcons", IFCAP_NETCONS, setifcap),
1036 DEF_CMD("-netcons", -IFCAP_NETCONS, setifcap),
1037 DEF_CMD("polling", IFCAP_POLLING, setifcap),
1038 DEF_CMD("-polling", -IFCAP_POLLING, setifcap),
1039 DEF_CMD("tso", IFCAP_TSO, setifcap),
1040 DEF_CMD("-tso", -IFCAP_TSO, setifcap),
1041 DEF_CMD("lro", IFCAP_LRO, setifcap),
1042 DEF_CMD("-lro", -IFCAP_LRO, setifcap),
1043 DEF_CMD("wol", IFCAP_WOL, setifcap),
1044 DEF_CMD("-wol", -IFCAP_WOL, setifcap),
1045 DEF_CMD("wol_ucast", IFCAP_WOL_UCAST, setifcap),
1046 DEF_CMD("-wol_ucast", -IFCAP_WOL_UCAST, setifcap),
1047 DEF_CMD("wol_mcast", IFCAP_WOL_MCAST, setifcap),
1048 DEF_CMD("-wol_mcast", -IFCAP_WOL_MCAST, setifcap),
1049 DEF_CMD("wol_magic", IFCAP_WOL_MAGIC, setifcap),
1050 DEF_CMD("-wol_magic", -IFCAP_WOL_MAGIC, setifcap),
1051 DEF_CMD("normal", -IFF_LINK0, setifflags),
1052 DEF_CMD("compress", IFF_LINK0, setifflags),
1053 DEF_CMD("noicmp", IFF_LINK1, setifflags),
1054 DEF_CMD_ARG("mtu", setifmtu),
1055 DEF_CMD_ARG("name", setifname),
1056 DEF_CMD_ARG("grekey", setifgrekey),
1057};
1058
1059static __constructor void
1060ifconfig_ctor(void)
1061{
1062#define N(a) (sizeof(a) / sizeof(a[0]))
1063 int i;
1064
1065 for (i = 0; i < N(basic_cmds); i++)
1066 cmd_register(&basic_cmds[i]);
1067#undef N
1068}