xref: /freebsd/sbin/ifconfig/ifmedia.c (revision 3fe92528afe8313fecf48822dde74bad5e380f48)
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 static struct ifmediareq *
188 getifmediastate(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 = getifmediastate(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 = getifmediastate(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 = getifmediastate(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_tokenring_descriptions[] =
348     IFM_SUBTYPE_TOKENRING_DESCRIPTIONS;
349 
350 static struct ifmedia_description ifm_subtype_tokenring_aliases[] =
351     IFM_SUBTYPE_TOKENRING_ALIASES;
352 
353 static struct ifmedia_description ifm_subtype_tokenring_option_descriptions[] =
354     IFM_SUBTYPE_TOKENRING_OPTION_DESCRIPTIONS;
355 
356 static struct ifmedia_description ifm_subtype_fddi_descriptions[] =
357     IFM_SUBTYPE_FDDI_DESCRIPTIONS;
358 
359 static struct ifmedia_description ifm_subtype_fddi_aliases[] =
360     IFM_SUBTYPE_FDDI_ALIASES;
361 
362 static struct ifmedia_description ifm_subtype_fddi_option_descriptions[] =
363     IFM_SUBTYPE_FDDI_OPTION_DESCRIPTIONS;
364 
365 static struct ifmedia_description ifm_subtype_ieee80211_descriptions[] =
366     IFM_SUBTYPE_IEEE80211_DESCRIPTIONS;
367 
368 static struct ifmedia_description ifm_subtype_ieee80211_aliases[] =
369     IFM_SUBTYPE_IEEE80211_ALIASES;
370 
371 static struct ifmedia_description ifm_subtype_ieee80211_option_descriptions[] =
372     IFM_SUBTYPE_IEEE80211_OPTION_DESCRIPTIONS;
373 
374 struct ifmedia_description ifm_subtype_ieee80211_mode_descriptions[] =
375     IFM_SUBTYPE_IEEE80211_MODE_DESCRIPTIONS;
376 
377 struct ifmedia_description ifm_subtype_ieee80211_mode_aliases[] =
378     IFM_SUBTYPE_IEEE80211_MODE_ALIASES;
379 
380 static struct ifmedia_description ifm_subtype_atm_descriptions[] =
381     IFM_SUBTYPE_ATM_DESCRIPTIONS;
382 
383 static struct ifmedia_description ifm_subtype_atm_aliases[] =
384     IFM_SUBTYPE_ATM_ALIASES;
385 
386 static struct ifmedia_description ifm_subtype_atm_option_descriptions[] =
387     IFM_SUBTYPE_ATM_OPTION_DESCRIPTIONS;
388 
389 static struct ifmedia_description ifm_subtype_shared_descriptions[] =
390     IFM_SUBTYPE_SHARED_DESCRIPTIONS;
391 
392 static struct ifmedia_description ifm_subtype_shared_aliases[] =
393     IFM_SUBTYPE_SHARED_ALIASES;
394 
395 static struct ifmedia_description ifm_shared_option_descriptions[] =
396     IFM_SHARED_OPTION_DESCRIPTIONS;
397 
398 struct ifmedia_type_to_subtype {
399 	struct {
400 		struct ifmedia_description *desc;
401 		int alias;
402 	} subtypes[5];
403 	struct {
404 		struct ifmedia_description *desc;
405 		int alias;
406 	} options[3];
407 	struct {
408 		struct ifmedia_description *desc;
409 		int alias;
410 	} modes[3];
411 };
412 
413 /* must be in the same order as IFM_TYPE_DESCRIPTIONS */
414 static struct ifmedia_type_to_subtype ifmedia_types_to_subtypes[] = {
415 	{
416 		{
417 			{ &ifm_subtype_shared_descriptions[0], 0 },
418 			{ &ifm_subtype_shared_aliases[0], 1 },
419 			{ &ifm_subtype_ethernet_descriptions[0], 0 },
420 			{ &ifm_subtype_ethernet_aliases[0], 1 },
421 			{ NULL, 0 },
422 		},
423 		{
424 			{ &ifm_shared_option_descriptions[0], 0 },
425 			{ &ifm_subtype_ethernet_option_descriptions[0], 0 },
426 			{ NULL, 0 },
427 		},
428 		{
429 			{ NULL, 0 },
430 		},
431 	},
432 	{
433 		{
434 			{ &ifm_subtype_shared_descriptions[0], 0 },
435 			{ &ifm_subtype_shared_aliases[0], 1 },
436 			{ &ifm_subtype_tokenring_descriptions[0], 0 },
437 			{ &ifm_subtype_tokenring_aliases[0], 1 },
438 			{ NULL, 0 },
439 		},
440 		{
441 			{ &ifm_shared_option_descriptions[0], 0 },
442 			{ &ifm_subtype_tokenring_option_descriptions[0], 0 },
443 			{ NULL, 0 },
444 		},
445 		{
446 			{ NULL, 0 },
447 		},
448 	},
449 	{
450 		{
451 			{ &ifm_subtype_shared_descriptions[0], 0 },
452 			{ &ifm_subtype_shared_aliases[0], 1 },
453 			{ &ifm_subtype_fddi_descriptions[0], 0 },
454 			{ &ifm_subtype_fddi_aliases[0], 1 },
455 			{ NULL, 0 },
456 		},
457 		{
458 			{ &ifm_shared_option_descriptions[0], 0 },
459 			{ &ifm_subtype_fddi_option_descriptions[0], 0 },
460 			{ NULL, 0 },
461 		},
462 		{
463 			{ NULL, 0 },
464 		},
465 	},
466 	{
467 		{
468 			{ &ifm_subtype_shared_descriptions[0], 0 },
469 			{ &ifm_subtype_shared_aliases[0], 1 },
470 			{ &ifm_subtype_ieee80211_descriptions[0], 0 },
471 			{ &ifm_subtype_ieee80211_aliases[0], 1 },
472 			{ NULL, 0 },
473 		},
474 		{
475 			{ &ifm_shared_option_descriptions[0], 0 },
476 			{ &ifm_subtype_ieee80211_option_descriptions[0], 0 },
477 			{ NULL, 0 },
478 		},
479 		{
480 			{ &ifm_subtype_ieee80211_mode_descriptions[0], 0 },
481 			{ &ifm_subtype_ieee80211_mode_aliases[0], 0 },
482 			{ NULL, 0 },
483 		},
484 	},
485 	{
486 		{
487 			{ &ifm_subtype_shared_descriptions[0], 0 },
488 			{ &ifm_subtype_shared_aliases[0], 1 },
489 			{ &ifm_subtype_atm_descriptions[0], 0 },
490 			{ &ifm_subtype_atm_aliases[0], 1 },
491 			{ NULL, 0 },
492 		},
493 		{
494 			{ &ifm_shared_option_descriptions[0], 0 },
495 			{ &ifm_subtype_atm_option_descriptions[0], 0 },
496 			{ NULL, 0 },
497 		},
498 		{
499 			{ NULL, 0 },
500 		},
501 	},
502 };
503 
504 static int
505 get_media_subtype(int type, const char *val)
506 {
507 	struct ifmedia_description *desc;
508 	struct ifmedia_type_to_subtype *ttos;
509 	int rval, i;
510 
511 	/* Find the top-level interface type. */
512 	for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
513 	    desc->ifmt_string != NULL; desc++, ttos++)
514 		if (type == desc->ifmt_word)
515 			break;
516 	if (desc->ifmt_string == NULL)
517 		errx(1, "unknown media type 0x%x", type);
518 
519 	for (i = 0; ttos->subtypes[i].desc != NULL; i++) {
520 		rval = lookup_media_word(ttos->subtypes[i].desc, val);
521 		if (rval != -1)
522 			return (rval);
523 	}
524 	errx(1, "unknown media subtype: %s", val);
525 	/*NOTREACHED*/
526 }
527 
528 static int
529 get_media_mode(int type, const char *val)
530 {
531 	struct ifmedia_description *desc;
532 	struct ifmedia_type_to_subtype *ttos;
533 	int rval, i;
534 
535 	/* Find the top-level interface type. */
536 	for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
537 	    desc->ifmt_string != NULL; desc++, ttos++)
538 		if (type == desc->ifmt_word)
539 			break;
540 	if (desc->ifmt_string == NULL)
541 		errx(1, "unknown media mode 0x%x", type);
542 
543 	for (i = 0; ttos->modes[i].desc != NULL; i++) {
544 		rval = lookup_media_word(ttos->modes[i].desc, val);
545 		if (rval != -1)
546 			return (rval);
547 	}
548 	return -1;
549 }
550 
551 static int
552 get_media_options(int type, const char *val)
553 {
554 	struct ifmedia_description *desc;
555 	struct ifmedia_type_to_subtype *ttos;
556 	char *optlist, *optptr;
557 	int option = 0, i, rval = 0;
558 
559 	/* We muck with the string, so copy it. */
560 	optlist = strdup(val);
561 	if (optlist == NULL)
562 		err(1, "strdup");
563 
564 	/* Find the top-level interface type. */
565 	for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
566 	    desc->ifmt_string != NULL; desc++, ttos++)
567 		if (type == desc->ifmt_word)
568 			break;
569 	if (desc->ifmt_string == NULL)
570 		errx(1, "unknown media type 0x%x", type);
571 
572 	/*
573 	 * Look up the options in the user-provided comma-separated
574 	 * list.
575 	 */
576 	optptr = optlist;
577 	for (; (optptr = strtok(optptr, ",")) != NULL; optptr = NULL) {
578 		for (i = 0; ttos->options[i].desc != NULL; i++) {
579 			option = lookup_media_word(ttos->options[i].desc, optptr);
580 			if (option != -1)
581 				break;
582 		}
583 		if (option == 0)
584 			errx(1, "unknown option: %s", optptr);
585 		rval |= option;
586 	}
587 
588 	free(optlist);
589 	return (rval);
590 }
591 
592 static int
593 lookup_media_word(struct ifmedia_description *desc, const char *val)
594 {
595 
596 	for (; desc->ifmt_string != NULL; desc++)
597 		if (strcasecmp(desc->ifmt_string, val) == 0)
598 			return (desc->ifmt_word);
599 
600 	return (-1);
601 }
602 
603 static struct ifmedia_description *get_toptype_desc(int ifmw)
604 {
605 	struct ifmedia_description *desc;
606 
607 	for (desc = ifm_type_descriptions; desc->ifmt_string != NULL; desc++)
608 		if (IFM_TYPE(ifmw) == desc->ifmt_word)
609 			break;
610 
611 	return desc;
612 }
613 
614 static struct ifmedia_type_to_subtype *get_toptype_ttos(int ifmw)
615 {
616 	struct ifmedia_description *desc;
617 	struct ifmedia_type_to_subtype *ttos;
618 
619 	for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
620 	    desc->ifmt_string != NULL; desc++, ttos++)
621 		if (IFM_TYPE(ifmw) == desc->ifmt_word)
622 			break;
623 
624 	return ttos;
625 }
626 
627 static struct ifmedia_description *get_subtype_desc(int ifmw,
628     struct ifmedia_type_to_subtype *ttos)
629 {
630 	int i;
631 	struct ifmedia_description *desc;
632 
633 	for (i = 0; ttos->subtypes[i].desc != NULL; i++) {
634 		if (ttos->subtypes[i].alias)
635 			continue;
636 		for (desc = ttos->subtypes[i].desc;
637 		    desc->ifmt_string != NULL; desc++) {
638 			if (IFM_SUBTYPE(ifmw) == desc->ifmt_word)
639 				return desc;
640 		}
641 	}
642 
643 	return NULL;
644 }
645 
646 static struct ifmedia_description *get_mode_desc(int ifmw,
647     struct ifmedia_type_to_subtype *ttos)
648 {
649 	int i;
650 	struct ifmedia_description *desc;
651 
652 	for (i = 0; ttos->modes[i].desc != NULL; i++) {
653 		if (ttos->modes[i].alias)
654 			continue;
655 		for (desc = ttos->modes[i].desc;
656 		    desc->ifmt_string != NULL; desc++) {
657 			if (IFM_MODE(ifmw) == desc->ifmt_word)
658 				return desc;
659 		}
660 	}
661 
662 	return NULL;
663 }
664 
665 static void
666 print_media_word(int ifmw, int print_toptype)
667 {
668 	struct ifmedia_description *desc;
669 	struct ifmedia_type_to_subtype *ttos;
670 	int seen_option = 0, i;
671 
672 	/* Find the top-level interface type. */
673 	desc = get_toptype_desc(ifmw);
674 	ttos = get_toptype_ttos(ifmw);
675 	if (desc->ifmt_string == NULL) {
676 		printf("<unknown type>");
677 		return;
678 	} else if (print_toptype) {
679 		printf("%s", desc->ifmt_string);
680 	}
681 
682 	/*
683 	 * Don't print the top-level type; it's not like we can
684 	 * change it, or anything.
685 	 */
686 
687 	/* Find subtype. */
688 	desc = get_subtype_desc(ifmw, ttos);
689 	if (desc == NULL) {
690 		printf("<unknown subtype>");
691 		return;
692 	}
693 
694 	if (print_toptype)
695 		putchar(' ');
696 
697 	printf("%s", desc->ifmt_string);
698 
699 	if (print_toptype) {
700 		desc = get_mode_desc(ifmw, ttos);
701 		if (desc != NULL && strcasecmp("autoselect", desc->ifmt_string))
702 			printf(" mode %s", desc->ifmt_string);
703 	}
704 
705 	/* Find options. */
706 	for (i = 0; ttos->options[i].desc != NULL; i++) {
707 		if (ttos->options[i].alias)
708 			continue;
709 		for (desc = ttos->options[i].desc;
710 		    desc->ifmt_string != NULL; desc++) {
711 			if (ifmw & desc->ifmt_word) {
712 				if (seen_option == 0)
713 					printf(" <");
714 				printf("%s%s", seen_option++ ? "," : "",
715 				    desc->ifmt_string);
716 			}
717 		}
718 	}
719 	printf("%s", seen_option ? ">" : "");
720 }
721 
722 static void
723 print_media_word_ifconfig(int ifmw)
724 {
725 	struct ifmedia_description *desc;
726 	struct ifmedia_type_to_subtype *ttos;
727 	int i;
728 
729 	/* Find the top-level interface type. */
730 	desc = get_toptype_desc(ifmw);
731 	ttos = get_toptype_ttos(ifmw);
732 	if (desc->ifmt_string == NULL) {
733 		printf("<unknown type>");
734 		return;
735 	}
736 
737 	/*
738 	 * Don't print the top-level type; it's not like we can
739 	 * change it, or anything.
740 	 */
741 
742 	/* Find subtype. */
743 	desc = get_subtype_desc(ifmw, ttos);
744 	if (desc == NULL) {
745 		printf("<unknown subtype>");
746 		return;
747 	}
748 
749 	printf("media %s", desc->ifmt_string);
750 
751 	desc = get_mode_desc(ifmw, ttos);
752 	if (desc != NULL)
753 		printf(" mode %s", desc->ifmt_string);
754 
755 	/* Find options. */
756 	for (i = 0; ttos->options[i].desc != NULL; i++) {
757 		if (ttos->options[i].alias)
758 			continue;
759 		for (desc = ttos->options[i].desc;
760 		    desc->ifmt_string != NULL; desc++) {
761 			if (ifmw & desc->ifmt_word) {
762 				printf(" mediaopt %s", desc->ifmt_string);
763 			}
764 		}
765 	}
766 }
767 
768 /**********************************************************************
769  * ...until here.
770  **********************************************************************/
771 
772 static struct cmd media_cmds[] = {
773 	DEF_CMD_ARG("media",	setmedia),
774 	DEF_CMD_ARG("mode",	setmediamode),
775 	DEF_CMD_ARG("mediaopt",	setmediaopt),
776 	DEF_CMD_ARG("-mediaopt",unsetmediaopt),
777 };
778 static struct afswtch af_media = {
779 	.af_name	= "af_media",
780 	.af_af		= AF_UNSPEC,
781 	.af_other_status = media_status,
782 };
783 
784 static __constructor void
785 ifmedia_ctor(void)
786 {
787 #define	N(a)	(sizeof(a) / sizeof(a[0]))
788 	int i;
789 
790 	for (i = 0; i < N(media_cmds);  i++)
791 		cmd_register(&media_cmds[i]);
792 	af_register(&af_media);
793 #undef N
794 }
795