xref: /dragonfly/sbin/ifconfig/ifmedia.c (revision 0ca59c34)
1 /*	$NetBSD: ifconfig.c,v 1.34 1997/04/21 01:17:58 lukem Exp $	*/
2 /* $FreeBSD: src/sbin/ifconfig/ifmedia.c,v 1.19.2.1 2006/03/01 22:24:23 glebius Exp $ */
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. Neither the name of the University nor the names of its contributors
49  *    may be used to endorse or promote products derived from this software
50  *    without specific prior written permission.
51  *
52  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
53  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
54  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
55  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
56  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
57  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
58  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
59  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
60  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
61  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
62  * SUCH DAMAGE.
63  */
64 
65 #include <sys/param.h>
66 #include <sys/ioctl.h>
67 #include <sys/socket.h>
68 #include <sys/sysctl.h>
69 #include <sys/time.h>
70 
71 #include <net/if.h>
72 #include <net/if_dl.h>
73 #include <net/if_types.h>
74 #include <net/if_media.h>
75 #include <net/route.h>
76 
77 #include <ctype.h>
78 #include <err.h>
79 #include <errno.h>
80 #include <fcntl.h>
81 #include <stdio.h>
82 #include <stdlib.h>
83 #include <string.h>
84 #include <unistd.h>
85 
86 #include "ifconfig.h"
87 
88 static void	domediaopt(const char *, int, int);
89 static int	get_media_subtype(int, const char *);
90 static int	get_media_mode(int, const char *);
91 static int	get_media_options(int, const char *);
92 static int	lookup_media_word(struct ifmedia_description *, const char *);
93 static void	print_media_word(int, int);
94 static void	print_media_word_ifconfig(int);
95 
96 static struct ifmedia_description *get_toptype_desc(int);
97 static struct ifmedia_type_to_subtype *get_toptype_ttos(int);
98 static struct ifmedia_description *get_subtype_desc(int,
99     struct ifmedia_type_to_subtype *ttos);
100 
101 static void
102 media_status(int s)
103 {
104 	struct ifmediareq ifmr;
105 	int *media_list, i;
106 
107 	memset(&ifmr, 0, sizeof(ifmr));
108 	strncpy(ifmr.ifm_name, name, sizeof(ifmr.ifm_name));
109 
110 	if (ioctl(s, SIOCGIFMEDIA, &ifmr) < 0) {
111 		/*
112 		 * Interface doesn't support SIOC{G,S}IFMEDIA.
113 		 */
114 		return;
115 	}
116 
117 	if (ifmr.ifm_count == 0) {
118 		warnx("%s: no media types?", name);
119 		return;
120 	}
121 
122 	media_list = malloc(ifmr.ifm_count * sizeof(int));
123 	if (media_list == NULL)
124 		err(1, "malloc");
125 	ifmr.ifm_ulist = media_list;
126 
127 	if (ioctl(s, SIOCGIFMEDIA, &ifmr) < 0)
128 		err(1, "SIOCGIFMEDIA");
129 
130 	printf("\tmedia: ");
131 	print_media_word(ifmr.ifm_current, 1);
132 	if (ifmr.ifm_active != ifmr.ifm_current) {
133 		putchar(' ');
134 		putchar('(');
135 		print_media_word(ifmr.ifm_active, 0);
136 		putchar(')');
137 	}
138 
139 	putchar('\n');
140 
141 	if (ifmr.ifm_status & IFM_AVALID) {
142 		printf("\tstatus: ");
143 		switch (IFM_TYPE(ifmr.ifm_active)) {
144 		case IFM_ETHER:
145 			if (ifmr.ifm_status & IFM_ACTIVE)
146 				printf("active");
147 			else
148 				printf("no carrier");
149 			break;
150 
151 		case IFM_ATM:
152 			if (ifmr.ifm_status & IFM_ACTIVE)
153 				printf("active");
154 			else
155 				printf("no carrier");
156 			break;
157 
158 		case IFM_IEEE80211:
159 			/* XXX: Different value for adhoc? */
160 			if (ifmr.ifm_status & IFM_ACTIVE)
161 				printf("associated");
162 			else
163 				printf("no carrier");
164 			break;
165 		case IFM_CARP:
166 			if (ifmr.ifm_status & IFM_ACTIVE)
167 				printf("master");
168 			else
169 				printf("backup");
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 
253 	ifmr = ifmedia_getstate(s);
254 
255 	/*
256 	 * We are primarily concerned with the top-level type.
257 	 * However, "current" may be only IFM_NONE, so we just look
258 	 * for the top-level type in the first "supported type"
259 	 * entry.
260 	 *
261 	 * (I'm assuming that all supported media types for a given
262 	 * interface will be the same top-level type..)
263 	 */
264 	subtype = get_media_subtype(IFM_TYPE(ifmr->ifm_ulist[0]), val);
265 
266 	strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
267 	ifr.ifr_media = (ifmr->ifm_current & ~(IFM_NMASK|IFM_TMASK)) |
268 	    IFM_TYPE(ifmr->ifm_ulist[0]) | subtype;
269 
270 	if ((ifr.ifr_media & IFM_TMASK) == 0) {
271 		ifr.ifr_media &= ~IFM_GMASK;
272 	}
273 
274 	ifmr->ifm_current = ifr.ifr_media;
275 	callback_register(setifmediacallback, (void *)ifmr);
276 }
277 
278 static void
279 setmediaopt(const char *val, int d, int s, const struct afswtch *afp)
280 {
281 
282 	domediaopt(val, 0, s);
283 }
284 
285 static void
286 unsetmediaopt(const char *val, int d, int s, const struct afswtch *afp)
287 {
288 
289 	domediaopt(val, 1, s);
290 }
291 
292 static void
293 domediaopt(const char *val, int clear, int s)
294 {
295 	struct ifmediareq *ifmr;
296 	int options;
297 
298 	ifmr = ifmedia_getstate(s);
299 
300 	options = get_media_options(IFM_TYPE(ifmr->ifm_ulist[0]), val);
301 
302 	strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
303 	ifr.ifr_media = ifmr->ifm_current;
304 	if (clear)
305 		ifr.ifr_media &= ~options;
306 	else
307 		ifr.ifr_media |= options;
308 
309 	ifmr->ifm_current = ifr.ifr_media;
310 	callback_register(setifmediacallback, (void *)ifmr);
311 }
312 
313 
314 static void
315 setmediamode(const char *val, int d, int s, const struct afswtch *afp)
316 {
317 	struct ifmediareq *ifmr;
318 	int mode;
319 
320 	ifmr = ifmedia_getstate(s);
321 
322 	mode = get_media_mode(IFM_TYPE(ifmr->ifm_ulist[0]), val);
323 
324 	strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
325 	ifr.ifr_media = (ifmr->ifm_current & ~IFM_MMASK) | mode;
326 
327 	ifmr->ifm_current = ifr.ifr_media;
328 	callback_register(setifmediacallback, (void *)ifmr);
329 }
330 
331 /**********************************************************************
332  * A good chunk of this is duplicated from sys/net/ifmedia.c
333  **********************************************************************/
334 
335 static struct ifmedia_description ifm_type_descriptions[] =
336     IFM_TYPE_DESCRIPTIONS;
337 
338 static struct ifmedia_description ifm_subtype_ethernet_descriptions[] =
339     IFM_SUBTYPE_ETHERNET_DESCRIPTIONS;
340 
341 static struct ifmedia_description ifm_subtype_ethernet_aliases[] =
342     IFM_SUBTYPE_ETHERNET_ALIASES;
343 
344 static struct ifmedia_description ifm_subtype_ethernet_option_descriptions[] =
345     IFM_SUBTYPE_ETHERNET_OPTION_DESCRIPTIONS;
346 
347 static struct ifmedia_description ifm_subtype_ieee80211_descriptions[] =
348     IFM_SUBTYPE_IEEE80211_DESCRIPTIONS;
349 
350 static struct ifmedia_description ifm_subtype_ieee80211_aliases[] =
351     IFM_SUBTYPE_IEEE80211_ALIASES;
352 
353 static struct ifmedia_description ifm_subtype_ieee80211_option_descriptions[] =
354     IFM_SUBTYPE_IEEE80211_OPTION_DESCRIPTIONS;
355 
356 struct ifmedia_description ifm_subtype_ieee80211_mode_descriptions[] =
357     IFM_SUBTYPE_IEEE80211_MODE_DESCRIPTIONS;
358 
359 struct ifmedia_description ifm_subtype_ieee80211_mode_aliases[] =
360     IFM_SUBTYPE_IEEE80211_MODE_ALIASES;
361 
362 static struct ifmedia_description ifm_subtype_atm_descriptions[] =
363     IFM_SUBTYPE_ATM_DESCRIPTIONS;
364 
365 static struct ifmedia_description ifm_subtype_atm_aliases[] =
366     IFM_SUBTYPE_ATM_ALIASES;
367 
368 static struct ifmedia_description ifm_subtype_atm_option_descriptions[] =
369     IFM_SUBTYPE_ATM_OPTION_DESCRIPTIONS;
370 
371 static struct ifmedia_description ifm_subtype_shared_descriptions[] =
372     IFM_SUBTYPE_SHARED_DESCRIPTIONS;
373 
374 static struct ifmedia_description ifm_subtype_shared_aliases[] =
375     IFM_SUBTYPE_SHARED_ALIASES;
376 
377 static struct ifmedia_description ifm_shared_option_descriptions[] =
378     IFM_SHARED_OPTION_DESCRIPTIONS;
379 
380 struct ifmedia_type_to_subtype {
381 	struct {
382 		struct ifmedia_description *desc;
383 		int alias;
384 	} subtypes[5];
385 	struct {
386 		struct ifmedia_description *desc;
387 		int alias;
388 	} options[3];
389 	struct {
390 		struct ifmedia_description *desc;
391 		int alias;
392 	} modes[3];
393 };
394 
395 /* must be in the same order as IFM_TYPE_DESCRIPTIONS */
396 static struct ifmedia_type_to_subtype ifmedia_types_to_subtypes[] = {
397 	{
398 		{
399 			{ &ifm_subtype_shared_descriptions[0], 0 },
400 			{ &ifm_subtype_shared_aliases[0], 1 },
401 			{ &ifm_subtype_ethernet_descriptions[0], 0 },
402 			{ &ifm_subtype_ethernet_aliases[0], 1 },
403 			{ NULL, 0 },
404 		},
405 		{
406 			{ &ifm_shared_option_descriptions[0], 0 },
407 			{ &ifm_subtype_ethernet_option_descriptions[0], 0 },
408 			{ NULL, 0 },
409 		},
410 		{
411 			{ NULL, 0 },
412 		},
413 	},
414 	{
415 		{
416 			{ &ifm_subtype_shared_descriptions[0], 0 },
417 			{ &ifm_subtype_shared_aliases[0], 1 },
418 			{ &ifm_subtype_ieee80211_descriptions[0], 0 },
419 			{ &ifm_subtype_ieee80211_aliases[0], 1 },
420 			{ NULL, 0 },
421 		},
422 		{
423 			{ &ifm_shared_option_descriptions[0], 0 },
424 			{ &ifm_subtype_ieee80211_option_descriptions[0], 0 },
425 			{ NULL, 0 },
426 		},
427 		{
428 			{ &ifm_subtype_ieee80211_mode_descriptions[0], 0 },
429 			{ &ifm_subtype_ieee80211_mode_aliases[0], 0 },
430 			{ NULL, 0 },
431 		},
432 	},
433 	{
434 		{
435 			{ &ifm_subtype_shared_descriptions[0], 0 },
436 			{ &ifm_subtype_shared_aliases[0], 1 },
437 			{ &ifm_subtype_atm_descriptions[0], 0 },
438 			{ &ifm_subtype_atm_aliases[0], 1 },
439 			{ NULL, 0 },
440 		},
441 		{
442 			{ &ifm_shared_option_descriptions[0], 0 },
443 			{ &ifm_subtype_atm_option_descriptions[0], 0 },
444 			{ NULL, 0 },
445 		},
446 		{
447 			{ NULL, 0 },
448 		},
449 	},
450 };
451 
452 static int
453 get_media_subtype(int type, const char *val)
454 {
455 	struct ifmedia_description *desc;
456 	struct ifmedia_type_to_subtype *ttos;
457 	int rval, i;
458 
459 	/* Find the top-level interface type. */
460 	for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
461 	    desc->ifmt_string != NULL; desc++, ttos++)
462 		if (type == desc->ifmt_word)
463 			break;
464 	if (desc->ifmt_string == NULL)
465 		errx(1, "unknown media type 0x%x", type);
466 
467 	for (i = 0; ttos->subtypes[i].desc != NULL; i++) {
468 		rval = lookup_media_word(ttos->subtypes[i].desc, val);
469 		if (rval != -1)
470 			return (rval);
471 	}
472 	errx(1, "unknown media subtype: %s", val);
473 	/*NOTREACHED*/
474 }
475 
476 static int
477 get_media_mode(int type, const char *val)
478 {
479 	struct ifmedia_description *desc;
480 	struct ifmedia_type_to_subtype *ttos;
481 	int rval, i;
482 
483 	/* Find the top-level interface type. */
484 	for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
485 	    desc->ifmt_string != NULL; desc++, ttos++)
486 		if (type == desc->ifmt_word)
487 			break;
488 	if (desc->ifmt_string == NULL)
489 		errx(1, "unknown media mode 0x%x", type);
490 
491 	for (i = 0; ttos->modes[i].desc != NULL; i++) {
492 		rval = lookup_media_word(ttos->modes[i].desc, val);
493 		if (rval != -1)
494 			return (rval);
495 	}
496 	return -1;
497 }
498 
499 static int
500 get_media_options(int type, const char *val)
501 {
502 	struct ifmedia_description *desc;
503 	struct ifmedia_type_to_subtype *ttos;
504 	char *optlist, *optptr;
505 	int option = 0, i, rval = 0;
506 
507 	/* We muck with the string, so copy it. */
508 	optlist = strdup(val);
509 	if (optlist == NULL)
510 		err(1, "strdup");
511 
512 	/* Find the top-level interface type. */
513 	for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
514 	    desc->ifmt_string != NULL; desc++, ttos++)
515 		if (type == desc->ifmt_word)
516 			break;
517 	if (desc->ifmt_string == NULL)
518 		errx(1, "unknown media type 0x%x", type);
519 
520 	/*
521 	 * Look up the options in the user-provided comma-separated
522 	 * list.
523 	 */
524 	optptr = optlist;
525 	for (; (optptr = strtok(optptr, ",")) != NULL; optptr = NULL) {
526 		for (i = 0; ttos->options[i].desc != NULL; i++) {
527 			option = lookup_media_word(ttos->options[i].desc, optptr);
528 			if (option != -1)
529 				break;
530 		}
531 		if (option == 0)
532 			errx(1, "unknown option: %s", optptr);
533 		rval |= option;
534 	}
535 
536 	free(optlist);
537 	return (rval);
538 }
539 
540 static int
541 lookup_media_word(struct ifmedia_description *desc, const char *val)
542 {
543 
544 	for (; desc->ifmt_string != NULL; desc++)
545 		if (strcasecmp(desc->ifmt_string, val) == 0)
546 			return (desc->ifmt_word);
547 
548 	return (-1);
549 }
550 
551 static struct ifmedia_description *get_toptype_desc(int ifmw)
552 {
553 	struct ifmedia_description *desc;
554 
555 	for (desc = ifm_type_descriptions; desc->ifmt_string != NULL; desc++)
556 		if (IFM_TYPE(ifmw) == desc->ifmt_word)
557 			break;
558 
559 	return desc;
560 }
561 
562 static struct ifmedia_type_to_subtype *get_toptype_ttos(int ifmw)
563 {
564 	struct ifmedia_description *desc;
565 	struct ifmedia_type_to_subtype *ttos;
566 
567 	for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
568 	    desc->ifmt_string != NULL; desc++, ttos++)
569 		if (IFM_TYPE(ifmw) == desc->ifmt_word)
570 			break;
571 
572 	return ttos;
573 }
574 
575 static struct ifmedia_description *get_subtype_desc(int ifmw,
576     struct ifmedia_type_to_subtype *ttos)
577 {
578 	int i;
579 	struct ifmedia_description *desc;
580 
581 	for (i = 0; ttos->subtypes[i].desc != NULL; i++) {
582 		if (ttos->subtypes[i].alias)
583 			continue;
584 		for (desc = ttos->subtypes[i].desc;
585 		    desc->ifmt_string != NULL; desc++) {
586 			if (IFM_SUBTYPE(ifmw) == desc->ifmt_word)
587 				return desc;
588 		}
589 	}
590 
591 	return NULL;
592 }
593 
594 static struct ifmedia_description *get_mode_desc(int ifmw,
595     struct ifmedia_type_to_subtype *ttos)
596 {
597 	int i;
598 	struct ifmedia_description *desc;
599 
600 	for (i = 0; ttos->modes[i].desc != NULL; i++) {
601 		if (ttos->modes[i].alias)
602 			continue;
603 		for (desc = ttos->modes[i].desc;
604 		    desc->ifmt_string != NULL; desc++) {
605 			if (IFM_MODE(ifmw) == desc->ifmt_word)
606 				return desc;
607 		}
608 	}
609 
610 	return NULL;
611 }
612 
613 static void
614 print_media_word(int ifmw, int print_toptype)
615 {
616 	struct ifmedia_description *desc;
617 	struct ifmedia_type_to_subtype *ttos;
618 	int seen_option = 0, i;
619 
620 	/* Find the top-level interface type. */
621 	desc = get_toptype_desc(ifmw);
622 	ttos = get_toptype_ttos(ifmw);
623 	if (desc->ifmt_string == NULL) {
624 		printf("<unknown type>");
625 		return;
626 	} else if (print_toptype) {
627 		printf("%s", desc->ifmt_string);
628 	}
629 
630 	/*
631 	 * Don't print the top-level type; it's not like we can
632 	 * change it, or anything.
633 	 */
634 
635 	/* Find subtype. */
636 	desc = get_subtype_desc(ifmw, ttos);
637 	if (desc != NULL)
638 		goto got_subtype;
639 
640 	/* Falling to here means unknown subtype. */
641 	printf("<unknown subtype>");
642 	return;
643 
644  got_subtype:
645 	if (print_toptype)
646 		putchar(' ');
647 
648 	printf("%s", desc->ifmt_string);
649 
650 	if (print_toptype) {
651 		desc = get_mode_desc(ifmw, ttos);
652 		if (desc != NULL && strcasecmp("autoselect", desc->ifmt_string))
653 			printf(" mode %s", desc->ifmt_string);
654 	}
655 
656 	/* Find options. */
657 	for (i = 0; ttos->options[i].desc != NULL; i++) {
658 		if (ttos->options[i].alias)
659 			continue;
660 		for (desc = ttos->options[i].desc;
661 		    desc->ifmt_string != NULL; desc++) {
662 			if (ifmw & desc->ifmt_word) {
663 				if (seen_option == 0)
664 					printf(" <");
665 				printf("%s%s", seen_option++ ? "," : "",
666 				    desc->ifmt_string);
667 			}
668 		}
669 	}
670 	printf("%s", seen_option ? ">" : "");
671 }
672 
673 static void
674 print_media_word_ifconfig(int ifmw)
675 {
676 	struct ifmedia_description *desc;
677 	struct ifmedia_type_to_subtype *ttos;
678 	int i;
679 
680 	/* Find the top-level interface type. */
681 	desc = get_toptype_desc(ifmw);
682 	ttos = get_toptype_ttos(ifmw);
683 	if (desc->ifmt_string == NULL) {
684 		printf("<unknown type>");
685 		return;
686 	}
687 
688 	/*
689 	 * Don't print the top-level type; it's not like we can
690 	 * change it, or anything.
691 	 */
692 
693 	/* Find subtype. */
694 	desc = get_subtype_desc(ifmw, ttos);
695 	if (desc != NULL)
696 		goto got_subtype;
697 
698 	/* Falling to here means unknown subtype. */
699 	printf("<unknown subtype>");
700 	return;
701 
702  got_subtype:
703 	printf("media %s", desc->ifmt_string);
704 
705 	desc = get_mode_desc(ifmw, ttos);
706 	if (desc != NULL)
707 		printf(" mode %s", desc->ifmt_string);
708 
709 	/* Find options. */
710 	for (i = 0; ttos->options[i].desc != NULL; i++) {
711 		if (ttos->options[i].alias)
712 			continue;
713 		for (desc = ttos->options[i].desc;
714 		    desc->ifmt_string != NULL; desc++) {
715 			if (ifmw & desc->ifmt_word) {
716 				printf(" mediaopt %s", desc->ifmt_string);
717 			}
718 		}
719 	}
720 }
721 
722 /**********************************************************************
723  * ...until here.
724  **********************************************************************/
725 
726 static struct cmd media_cmds[] = {
727 	DEF_CMD_ARG("media",	setmedia),
728 	DEF_CMD_ARG("mode",	setmediamode),
729 	DEF_CMD_ARG("mediaopt",	setmediaopt),
730 	DEF_CMD_ARG("-mediaopt",unsetmediaopt),
731 };
732 static struct afswtch af_media = {
733 	.af_name	= "af_media",
734 	.af_af		= AF_UNSPEC,
735 	.af_other_status = media_status,
736 };
737 
738 static __constructor(101) void
739 ifmedia_ctor(void)
740 {
741 #define	N(a)	(sizeof(a) / sizeof(a[0]))
742 	int i;
743 
744 	for (i = 0; i < N(media_cmds);  i++)
745 		cmd_register(&media_cmds[i]);
746 	af_register(&af_media);
747 #undef N
748 }
749