xref: /freebsd/sbin/ifconfig/ifmedia.c (revision 1e413cf93298b5b97441a21d9a50fdcd0ee9945e)
1 /*	$NetBSD: ifconfig.c,v 1.34 1997/04/21 01:17:58 lukem Exp $	*/
2 /* $FreeBSD$ */
3 
4 /*
5  * Copyright (c) 1997 Jason R. Thorpe.
6  * All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  * 3. All advertising materials mentioning features or use of this software
17  *    must display the following acknowledgement:
18  *      This product includes software developed for the NetBSD Project
19  *	by Jason R. Thorpe.
20  * 4. The name of the author may not be used to endorse or promote products
21  *    derived from this software without specific prior written permission.
22  *
23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
24  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
27  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
28  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
29  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
30  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
31  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33  * SUCH DAMAGE.
34  */
35 
36 /*
37  * Copyright (c) 1983, 1993
38  *	The Regents of the University of California.  All rights reserved.
39  *
40  * Redistribution and use in source and binary forms, with or without
41  * modification, are permitted provided that the following conditions
42  * are met:
43  * 1. Redistributions of source code must retain the above copyright
44  *    notice, this list of conditions and the following disclaimer.
45  * 2. Redistributions in binary form must reproduce the above copyright
46  *    notice, this list of conditions and the following disclaimer in the
47  *    documentation and/or other materials provided with the distribution.
48  * 3. All advertising materials mentioning features or use of this software
49  *    must display the following acknowledgement:
50  *	This product includes software developed by the University of
51  *	California, Berkeley and its contributors.
52  * 4. Neither the name of the University nor the names of its contributors
53  *    may be used to endorse or promote products derived from this software
54  *    without specific prior written permission.
55  *
56  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
57  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
58  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
59  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
60  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
61  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
62  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
63  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
64  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
65  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
66  * SUCH DAMAGE.
67  */
68 
69 #include <sys/param.h>
70 #include <sys/ioctl.h>
71 #include <sys/socket.h>
72 #include <sys/sysctl.h>
73 #include <sys/time.h>
74 
75 #include <net/if.h>
76 #include <net/if_dl.h>
77 #include <net/if_types.h>
78 #include <net/if_media.h>
79 #include <net/route.h>
80 
81 #include <ctype.h>
82 #include <err.h>
83 #include <errno.h>
84 #include <fcntl.h>
85 #include <stdio.h>
86 #include <stdlib.h>
87 #include <string.h>
88 #include <unistd.h>
89 
90 #include "ifconfig.h"
91 
92 static void	domediaopt(const char *, int, int);
93 static int	get_media_subtype(int, const char *);
94 static int	get_media_mode(int, const char *);
95 static int	get_media_options(int, const char *);
96 static int	lookup_media_word(struct ifmedia_description *, const char *);
97 static void	print_media_word(int, int);
98 static void	print_media_word_ifconfig(int);
99 
100 static struct ifmedia_description *get_toptype_desc(int);
101 static struct ifmedia_type_to_subtype *get_toptype_ttos(int);
102 static struct ifmedia_description *get_subtype_desc(int,
103     struct ifmedia_type_to_subtype *ttos);
104 
105 static void
106 media_status(int s)
107 {
108 	struct ifmediareq ifmr;
109 	int *media_list, i;
110 
111 	(void) memset(&ifmr, 0, sizeof(ifmr));
112 	(void) strncpy(ifmr.ifm_name, name, sizeof(ifmr.ifm_name));
113 
114 	if (ioctl(s, SIOCGIFMEDIA, (caddr_t)&ifmr) < 0) {
115 		/*
116 		 * Interface doesn't support SIOC{G,S}IFMEDIA.
117 		 */
118 		return;
119 	}
120 
121 	if (ifmr.ifm_count == 0) {
122 		warnx("%s: no media types?", name);
123 		return;
124 	}
125 
126 	media_list = (int *)malloc(ifmr.ifm_count * sizeof(int));
127 	if (media_list == NULL)
128 		err(1, "malloc");
129 	ifmr.ifm_ulist = media_list;
130 
131 	if (ioctl(s, SIOCGIFMEDIA, (caddr_t)&ifmr) < 0)
132 		err(1, "SIOCGIFMEDIA");
133 
134 	printf("\tmedia: ");
135 	print_media_word(ifmr.ifm_current, 1);
136 	if (ifmr.ifm_active != ifmr.ifm_current) {
137 		putchar(' ');
138 		putchar('(');
139 		print_media_word(ifmr.ifm_active, 0);
140 		putchar(')');
141 	}
142 
143 	putchar('\n');
144 
145 	if (ifmr.ifm_status & IFM_AVALID) {
146 		printf("\tstatus: ");
147 		switch (IFM_TYPE(ifmr.ifm_active)) {
148 		case IFM_ETHER:
149 		case IFM_ATM:
150 			if (ifmr.ifm_status & IFM_ACTIVE)
151 				printf("active");
152 			else
153 				printf("no carrier");
154 			break;
155 
156 		case IFM_FDDI:
157 		case IFM_TOKEN:
158 			if (ifmr.ifm_status & IFM_ACTIVE)
159 				printf("inserted");
160 			else
161 				printf("no ring");
162 			break;
163 
164 		case IFM_IEEE80211:
165 			/* XXX: Different value for adhoc? */
166 			if (ifmr.ifm_status & IFM_ACTIVE)
167 				printf("associated");
168 			else
169 				printf("no carrier");
170 			break;
171 		}
172 		putchar('\n');
173 	}
174 
175 	if (ifmr.ifm_count > 0 && supmedia) {
176 		printf("\tsupported media:\n");
177 		for (i = 0; i < ifmr.ifm_count; i++) {
178 			printf("\t\t");
179 			print_media_word_ifconfig(media_list[i]);
180 			putchar('\n');
181 		}
182 	}
183 
184 	free(media_list);
185 }
186 
187 struct ifmediareq *
188 ifmedia_getstate(int s)
189 {
190 	static struct ifmediareq *ifmr = NULL;
191 	int *mwords;
192 
193 	if (ifmr == NULL) {
194 		ifmr = (struct ifmediareq *)malloc(sizeof(struct ifmediareq));
195 		if (ifmr == NULL)
196 			err(1, "malloc");
197 
198 		(void) memset(ifmr, 0, sizeof(struct ifmediareq));
199 		(void) strncpy(ifmr->ifm_name, name,
200 		    sizeof(ifmr->ifm_name));
201 
202 		ifmr->ifm_count = 0;
203 		ifmr->ifm_ulist = NULL;
204 
205 		/*
206 		 * We must go through the motions of reading all
207 		 * supported media because we need to know both
208 		 * the current media type and the top-level type.
209 		 */
210 
211 		if (ioctl(s, SIOCGIFMEDIA, (caddr_t)ifmr) < 0) {
212 			err(1, "SIOCGIFMEDIA");
213 		}
214 
215 		if (ifmr->ifm_count == 0)
216 			errx(1, "%s: no media types?", name);
217 
218 		mwords = (int *)malloc(ifmr->ifm_count * sizeof(int));
219 		if (mwords == NULL)
220 			err(1, "malloc");
221 
222 		ifmr->ifm_ulist = mwords;
223 		if (ioctl(s, SIOCGIFMEDIA, (caddr_t)ifmr) < 0)
224 			err(1, "SIOCGIFMEDIA");
225 	}
226 
227 	return ifmr;
228 }
229 
230 static void
231 setifmediacallback(int s, void *arg)
232 {
233 	struct ifmediareq *ifmr = (struct ifmediareq *)arg;
234 	static int did_it = 0;
235 
236 	if (!did_it) {
237 		ifr.ifr_media = ifmr->ifm_current;
238 		if (ioctl(s, SIOCSIFMEDIA, (caddr_t)&ifr) < 0)
239 			err(1, "SIOCSIFMEDIA (media)");
240 		free(ifmr->ifm_ulist);
241 		free(ifmr);
242 		did_it = 1;
243 	}
244 }
245 
246 static void
247 setmedia(const char *val, int d, int s, const struct afswtch *afp)
248 {
249 	struct ifmediareq *ifmr;
250 	int subtype;
251 
252 	ifmr = ifmedia_getstate(s);
253 
254 	/*
255 	 * We are primarily concerned with the top-level type.
256 	 * However, "current" may be only IFM_NONE, so we just look
257 	 * for the top-level type in the first "supported type"
258 	 * entry.
259 	 *
260 	 * (I'm assuming that all supported media types for a given
261 	 * interface will be the same top-level type..)
262 	 */
263 	subtype = get_media_subtype(IFM_TYPE(ifmr->ifm_ulist[0]), val);
264 
265 	strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
266 	ifr.ifr_media = (ifmr->ifm_current & ~(IFM_NMASK|IFM_TMASK)) |
267 	    IFM_TYPE(ifmr->ifm_ulist[0]) | subtype;
268 
269 	if ((ifr.ifr_media & IFM_TMASK) == 0) {
270 		ifr.ifr_media &= ~IFM_GMASK;
271 	}
272 
273 	ifmr->ifm_current = ifr.ifr_media;
274 	callback_register(setifmediacallback, (void *)ifmr);
275 }
276 
277 static void
278 setmediaopt(const char *val, int d, int s, const struct afswtch *afp)
279 {
280 
281 	domediaopt(val, 0, s);
282 }
283 
284 static void
285 unsetmediaopt(const char *val, int d, int s, const struct afswtch *afp)
286 {
287 
288 	domediaopt(val, 1, s);
289 }
290 
291 static void
292 domediaopt(const char *val, int clear, int s)
293 {
294 	struct ifmediareq *ifmr;
295 	int options;
296 
297 	ifmr = ifmedia_getstate(s);
298 
299 	options = get_media_options(IFM_TYPE(ifmr->ifm_ulist[0]), val);
300 
301 	strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
302 	ifr.ifr_media = ifmr->ifm_current;
303 	if (clear)
304 		ifr.ifr_media &= ~options;
305 	else {
306 		if (options & IFM_HDX) {
307 			ifr.ifr_media &= ~IFM_FDX;
308 			options &= ~IFM_HDX;
309 		}
310 		ifr.ifr_media |= options;
311 	}
312 	ifmr->ifm_current = ifr.ifr_media;
313 	callback_register(setifmediacallback, (void *)ifmr);
314 }
315 
316 static void
317 setmediainst(const char *val, int d, int s, const struct afswtch *afp)
318 {
319 	struct ifmediareq *ifmr;
320 	int inst;
321 
322 	ifmr = ifmedia_getstate(s);
323 
324 	inst = atoi(val);
325 	if (inst < 0 || inst > IFM_INST_MAX)
326 		errx(1, "invalid media instance: %s", val);
327 
328 	strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
329 	ifr.ifr_media = (ifmr->ifm_current & ~IFM_IMASK) | inst << IFM_ISHIFT;
330 
331 	ifmr->ifm_current = ifr.ifr_media;
332 	callback_register(setifmediacallback, (void *)ifmr);
333 }
334 
335 static void
336 setmediamode(const char *val, int d, int s, const struct afswtch *afp)
337 {
338 	struct ifmediareq *ifmr;
339 	int mode;
340 
341 	ifmr = ifmedia_getstate(s);
342 
343 	mode = get_media_mode(IFM_TYPE(ifmr->ifm_ulist[0]), val);
344 
345 	strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
346 	ifr.ifr_media = (ifmr->ifm_current & ~IFM_MMASK) | mode;
347 
348 	ifmr->ifm_current = ifr.ifr_media;
349 	callback_register(setifmediacallback, (void *)ifmr);
350 }
351 
352 /**********************************************************************
353  * A good chunk of this is duplicated from sys/net/ifmedia.c
354  **********************************************************************/
355 
356 static struct ifmedia_description ifm_type_descriptions[] =
357     IFM_TYPE_DESCRIPTIONS;
358 
359 static struct ifmedia_description ifm_subtype_ethernet_descriptions[] =
360     IFM_SUBTYPE_ETHERNET_DESCRIPTIONS;
361 
362 static struct ifmedia_description ifm_subtype_ethernet_aliases[] =
363     IFM_SUBTYPE_ETHERNET_ALIASES;
364 
365 static struct ifmedia_description ifm_subtype_ethernet_option_descriptions[] =
366     IFM_SUBTYPE_ETHERNET_OPTION_DESCRIPTIONS;
367 
368 static struct ifmedia_description ifm_subtype_tokenring_descriptions[] =
369     IFM_SUBTYPE_TOKENRING_DESCRIPTIONS;
370 
371 static struct ifmedia_description ifm_subtype_tokenring_aliases[] =
372     IFM_SUBTYPE_TOKENRING_ALIASES;
373 
374 static struct ifmedia_description ifm_subtype_tokenring_option_descriptions[] =
375     IFM_SUBTYPE_TOKENRING_OPTION_DESCRIPTIONS;
376 
377 static struct ifmedia_description ifm_subtype_fddi_descriptions[] =
378     IFM_SUBTYPE_FDDI_DESCRIPTIONS;
379 
380 static struct ifmedia_description ifm_subtype_fddi_aliases[] =
381     IFM_SUBTYPE_FDDI_ALIASES;
382 
383 static struct ifmedia_description ifm_subtype_fddi_option_descriptions[] =
384     IFM_SUBTYPE_FDDI_OPTION_DESCRIPTIONS;
385 
386 static struct ifmedia_description ifm_subtype_ieee80211_descriptions[] =
387     IFM_SUBTYPE_IEEE80211_DESCRIPTIONS;
388 
389 static struct ifmedia_description ifm_subtype_ieee80211_aliases[] =
390     IFM_SUBTYPE_IEEE80211_ALIASES;
391 
392 static struct ifmedia_description ifm_subtype_ieee80211_option_descriptions[] =
393     IFM_SUBTYPE_IEEE80211_OPTION_DESCRIPTIONS;
394 
395 struct ifmedia_description ifm_subtype_ieee80211_mode_descriptions[] =
396     IFM_SUBTYPE_IEEE80211_MODE_DESCRIPTIONS;
397 
398 struct ifmedia_description ifm_subtype_ieee80211_mode_aliases[] =
399     IFM_SUBTYPE_IEEE80211_MODE_ALIASES;
400 
401 static struct ifmedia_description ifm_subtype_atm_descriptions[] =
402     IFM_SUBTYPE_ATM_DESCRIPTIONS;
403 
404 static struct ifmedia_description ifm_subtype_atm_aliases[] =
405     IFM_SUBTYPE_ATM_ALIASES;
406 
407 static struct ifmedia_description ifm_subtype_atm_option_descriptions[] =
408     IFM_SUBTYPE_ATM_OPTION_DESCRIPTIONS;
409 
410 static struct ifmedia_description ifm_subtype_shared_descriptions[] =
411     IFM_SUBTYPE_SHARED_DESCRIPTIONS;
412 
413 static struct ifmedia_description ifm_subtype_shared_aliases[] =
414     IFM_SUBTYPE_SHARED_ALIASES;
415 
416 static struct ifmedia_description ifm_shared_option_descriptions[] =
417     IFM_SHARED_OPTION_DESCRIPTIONS;
418 
419 struct ifmedia_type_to_subtype {
420 	struct {
421 		struct ifmedia_description *desc;
422 		int alias;
423 	} subtypes[5];
424 	struct {
425 		struct ifmedia_description *desc;
426 		int alias;
427 	} options[3];
428 	struct {
429 		struct ifmedia_description *desc;
430 		int alias;
431 	} modes[3];
432 };
433 
434 /* must be in the same order as IFM_TYPE_DESCRIPTIONS */
435 static struct ifmedia_type_to_subtype ifmedia_types_to_subtypes[] = {
436 	{
437 		{
438 			{ &ifm_subtype_shared_descriptions[0], 0 },
439 			{ &ifm_subtype_shared_aliases[0], 1 },
440 			{ &ifm_subtype_ethernet_descriptions[0], 0 },
441 			{ &ifm_subtype_ethernet_aliases[0], 1 },
442 			{ NULL, 0 },
443 		},
444 		{
445 			{ &ifm_shared_option_descriptions[0], 0 },
446 			{ &ifm_subtype_ethernet_option_descriptions[0], 0 },
447 			{ NULL, 0 },
448 		},
449 		{
450 			{ NULL, 0 },
451 		},
452 	},
453 	{
454 		{
455 			{ &ifm_subtype_shared_descriptions[0], 0 },
456 			{ &ifm_subtype_shared_aliases[0], 1 },
457 			{ &ifm_subtype_tokenring_descriptions[0], 0 },
458 			{ &ifm_subtype_tokenring_aliases[0], 1 },
459 			{ NULL, 0 },
460 		},
461 		{
462 			{ &ifm_shared_option_descriptions[0], 0 },
463 			{ &ifm_subtype_tokenring_option_descriptions[0], 0 },
464 			{ NULL, 0 },
465 		},
466 		{
467 			{ NULL, 0 },
468 		},
469 	},
470 	{
471 		{
472 			{ &ifm_subtype_shared_descriptions[0], 0 },
473 			{ &ifm_subtype_shared_aliases[0], 1 },
474 			{ &ifm_subtype_fddi_descriptions[0], 0 },
475 			{ &ifm_subtype_fddi_aliases[0], 1 },
476 			{ NULL, 0 },
477 		},
478 		{
479 			{ &ifm_shared_option_descriptions[0], 0 },
480 			{ &ifm_subtype_fddi_option_descriptions[0], 0 },
481 			{ NULL, 0 },
482 		},
483 		{
484 			{ NULL, 0 },
485 		},
486 	},
487 	{
488 		{
489 			{ &ifm_subtype_shared_descriptions[0], 0 },
490 			{ &ifm_subtype_shared_aliases[0], 1 },
491 			{ &ifm_subtype_ieee80211_descriptions[0], 0 },
492 			{ &ifm_subtype_ieee80211_aliases[0], 1 },
493 			{ NULL, 0 },
494 		},
495 		{
496 			{ &ifm_shared_option_descriptions[0], 0 },
497 			{ &ifm_subtype_ieee80211_option_descriptions[0], 0 },
498 			{ NULL, 0 },
499 		},
500 		{
501 			{ &ifm_subtype_ieee80211_mode_descriptions[0], 0 },
502 			{ &ifm_subtype_ieee80211_mode_aliases[0], 0 },
503 			{ NULL, 0 },
504 		},
505 	},
506 	{
507 		{
508 			{ &ifm_subtype_shared_descriptions[0], 0 },
509 			{ &ifm_subtype_shared_aliases[0], 1 },
510 			{ &ifm_subtype_atm_descriptions[0], 0 },
511 			{ &ifm_subtype_atm_aliases[0], 1 },
512 			{ NULL, 0 },
513 		},
514 		{
515 			{ &ifm_shared_option_descriptions[0], 0 },
516 			{ &ifm_subtype_atm_option_descriptions[0], 0 },
517 			{ NULL, 0 },
518 		},
519 		{
520 			{ NULL, 0 },
521 		},
522 	},
523 };
524 
525 static int
526 get_media_subtype(int type, const char *val)
527 {
528 	struct ifmedia_description *desc;
529 	struct ifmedia_type_to_subtype *ttos;
530 	int rval, i;
531 
532 	/* Find the top-level interface type. */
533 	for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
534 	    desc->ifmt_string != NULL; desc++, ttos++)
535 		if (type == desc->ifmt_word)
536 			break;
537 	if (desc->ifmt_string == NULL)
538 		errx(1, "unknown media type 0x%x", type);
539 
540 	for (i = 0; ttos->subtypes[i].desc != NULL; i++) {
541 		rval = lookup_media_word(ttos->subtypes[i].desc, val);
542 		if (rval != -1)
543 			return (rval);
544 	}
545 	errx(1, "unknown media subtype: %s", val);
546 	/*NOTREACHED*/
547 }
548 
549 static int
550 get_media_mode(int type, const char *val)
551 {
552 	struct ifmedia_description *desc;
553 	struct ifmedia_type_to_subtype *ttos;
554 	int rval, i;
555 
556 	/* Find the top-level interface type. */
557 	for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
558 	    desc->ifmt_string != NULL; desc++, ttos++)
559 		if (type == desc->ifmt_word)
560 			break;
561 	if (desc->ifmt_string == NULL)
562 		errx(1, "unknown media mode 0x%x", type);
563 
564 	for (i = 0; ttos->modes[i].desc != NULL; i++) {
565 		rval = lookup_media_word(ttos->modes[i].desc, val);
566 		if (rval != -1)
567 			return (rval);
568 	}
569 	return -1;
570 }
571 
572 static int
573 get_media_options(int type, const char *val)
574 {
575 	struct ifmedia_description *desc;
576 	struct ifmedia_type_to_subtype *ttos;
577 	char *optlist, *optptr;
578 	int option = 0, i, rval = 0;
579 
580 	/* We muck with the string, so copy it. */
581 	optlist = strdup(val);
582 	if (optlist == NULL)
583 		err(1, "strdup");
584 
585 	/* Find the top-level interface type. */
586 	for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
587 	    desc->ifmt_string != NULL; desc++, ttos++)
588 		if (type == desc->ifmt_word)
589 			break;
590 	if (desc->ifmt_string == NULL)
591 		errx(1, "unknown media type 0x%x", type);
592 
593 	/*
594 	 * Look up the options in the user-provided comma-separated
595 	 * list.
596 	 */
597 	optptr = optlist;
598 	for (; (optptr = strtok(optptr, ",")) != NULL; optptr = NULL) {
599 		for (i = 0; ttos->options[i].desc != NULL; i++) {
600 			option = lookup_media_word(ttos->options[i].desc, optptr);
601 			if (option != -1)
602 				break;
603 		}
604 		if (option == 0)
605 			errx(1, "unknown option: %s", optptr);
606 		rval |= option;
607 	}
608 
609 	free(optlist);
610 	return (rval);
611 }
612 
613 static int
614 lookup_media_word(struct ifmedia_description *desc, const char *val)
615 {
616 
617 	for (; desc->ifmt_string != NULL; desc++)
618 		if (strcasecmp(desc->ifmt_string, val) == 0)
619 			return (desc->ifmt_word);
620 
621 	return (-1);
622 }
623 
624 static struct ifmedia_description *get_toptype_desc(int ifmw)
625 {
626 	struct ifmedia_description *desc;
627 
628 	for (desc = ifm_type_descriptions; desc->ifmt_string != NULL; desc++)
629 		if (IFM_TYPE(ifmw) == desc->ifmt_word)
630 			break;
631 
632 	return desc;
633 }
634 
635 static struct ifmedia_type_to_subtype *get_toptype_ttos(int ifmw)
636 {
637 	struct ifmedia_description *desc;
638 	struct ifmedia_type_to_subtype *ttos;
639 
640 	for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
641 	    desc->ifmt_string != NULL; desc++, ttos++)
642 		if (IFM_TYPE(ifmw) == desc->ifmt_word)
643 			break;
644 
645 	return ttos;
646 }
647 
648 static struct ifmedia_description *get_subtype_desc(int ifmw,
649     struct ifmedia_type_to_subtype *ttos)
650 {
651 	int i;
652 	struct ifmedia_description *desc;
653 
654 	for (i = 0; ttos->subtypes[i].desc != NULL; i++) {
655 		if (ttos->subtypes[i].alias)
656 			continue;
657 		for (desc = ttos->subtypes[i].desc;
658 		    desc->ifmt_string != NULL; desc++) {
659 			if (IFM_SUBTYPE(ifmw) == desc->ifmt_word)
660 				return desc;
661 		}
662 	}
663 
664 	return NULL;
665 }
666 
667 static struct ifmedia_description *get_mode_desc(int ifmw,
668     struct ifmedia_type_to_subtype *ttos)
669 {
670 	int i;
671 	struct ifmedia_description *desc;
672 
673 	for (i = 0; ttos->modes[i].desc != NULL; i++) {
674 		if (ttos->modes[i].alias)
675 			continue;
676 		for (desc = ttos->modes[i].desc;
677 		    desc->ifmt_string != NULL; desc++) {
678 			if (IFM_MODE(ifmw) == desc->ifmt_word)
679 				return desc;
680 		}
681 	}
682 
683 	return NULL;
684 }
685 
686 static void
687 print_media_word(int ifmw, int print_toptype)
688 {
689 	struct ifmedia_description *desc;
690 	struct ifmedia_type_to_subtype *ttos;
691 	int seen_option = 0, i;
692 
693 	/* Find the top-level interface type. */
694 	desc = get_toptype_desc(ifmw);
695 	ttos = get_toptype_ttos(ifmw);
696 	if (desc->ifmt_string == NULL) {
697 		printf("<unknown type>");
698 		return;
699 	} else if (print_toptype) {
700 		printf("%s", desc->ifmt_string);
701 	}
702 
703 	/*
704 	 * Don't print the top-level type; it's not like we can
705 	 * change it, or anything.
706 	 */
707 
708 	/* Find subtype. */
709 	desc = get_subtype_desc(ifmw, ttos);
710 	if (desc == NULL) {
711 		printf("<unknown subtype>");
712 		return;
713 	}
714 
715 	if (print_toptype)
716 		putchar(' ');
717 
718 	printf("%s", desc->ifmt_string);
719 
720 	if (print_toptype) {
721 		desc = get_mode_desc(ifmw, ttos);
722 		if (desc != NULL && strcasecmp("autoselect", desc->ifmt_string))
723 			printf(" mode %s", desc->ifmt_string);
724 	}
725 
726 	/* Find options. */
727 	for (i = 0; ttos->options[i].desc != NULL; i++) {
728 		if (ttos->options[i].alias)
729 			continue;
730 		for (desc = ttos->options[i].desc;
731 		    desc->ifmt_string != NULL; desc++) {
732 			if (ifmw & desc->ifmt_word) {
733 				if (seen_option == 0)
734 					printf(" <");
735 				printf("%s%s", seen_option++ ? "," : "",
736 				    desc->ifmt_string);
737 			}
738 		}
739 	}
740 	printf("%s", seen_option ? ">" : "");
741 
742 	if (print_toptype && IFM_INST(ifmw) != 0)
743 		printf(" instance %d", IFM_INST(ifmw));
744 }
745 
746 static void
747 print_media_word_ifconfig(int ifmw)
748 {
749 	struct ifmedia_description *desc;
750 	struct ifmedia_type_to_subtype *ttos;
751 	int i;
752 
753 	/* Find the top-level interface type. */
754 	desc = get_toptype_desc(ifmw);
755 	ttos = get_toptype_ttos(ifmw);
756 	if (desc->ifmt_string == NULL) {
757 		printf("<unknown type>");
758 		return;
759 	}
760 
761 	/*
762 	 * Don't print the top-level type; it's not like we can
763 	 * change it, or anything.
764 	 */
765 
766 	/* Find subtype. */
767 	desc = get_subtype_desc(ifmw, ttos);
768 	if (desc == NULL) {
769 		printf("<unknown subtype>");
770 		return;
771 	}
772 
773 	printf("media %s", desc->ifmt_string);
774 
775 	desc = get_mode_desc(ifmw, ttos);
776 	if (desc != NULL)
777 		printf(" mode %s", desc->ifmt_string);
778 
779 	/* Find options. */
780 	for (i = 0; ttos->options[i].desc != NULL; i++) {
781 		if (ttos->options[i].alias)
782 			continue;
783 		for (desc = ttos->options[i].desc;
784 		    desc->ifmt_string != NULL; desc++) {
785 			if (ifmw & desc->ifmt_word) {
786 				printf(" mediaopt %s", desc->ifmt_string);
787 			}
788 		}
789 	}
790 
791 	if (IFM_INST(ifmw) != 0)
792 		printf(" instance %d", IFM_INST(ifmw));
793 }
794 
795 /**********************************************************************
796  * ...until here.
797  **********************************************************************/
798 
799 static struct cmd media_cmds[] = {
800 	DEF_CMD_ARG("media",	setmedia),
801 	DEF_CMD_ARG("mode",	setmediamode),
802 	DEF_CMD_ARG("mediaopt",	setmediaopt),
803 	DEF_CMD_ARG("-mediaopt",unsetmediaopt),
804 	DEF_CMD_ARG("inst",	setmediainst),
805 	DEF_CMD_ARG("instance",	setmediainst),
806 };
807 static struct afswtch af_media = {
808 	.af_name	= "af_media",
809 	.af_af		= AF_UNSPEC,
810 	.af_other_status = media_status,
811 };
812 
813 static __constructor void
814 ifmedia_ctor(void)
815 {
816 #define	N(a)	(sizeof(a) / sizeof(a[0]))
817 	int i;
818 
819 	for (i = 0; i < N(media_cmds);  i++)
820 		cmd_register(&media_cmds[i]);
821 	af_register(&af_media);
822 #undef N
823 }
824