xref: /freebsd/sbin/ifconfig/ifmedia.c (revision 0b3105a37d7adcadcb720112fed4dc4e8040be99)
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  * 4. 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 #define	IFM_OPMODE(x) \
102 	((x) & (IFM_IEEE80211_ADHOC | IFM_IEEE80211_HOSTAP | \
103 	 IFM_IEEE80211_IBSS | IFM_IEEE80211_WDS | IFM_IEEE80211_MONITOR | \
104 	 IFM_IEEE80211_MBSS))
105 #define	IFM_IEEE80211_STA	0
106 
107 static void
108 media_status(int s)
109 {
110 	struct ifmediareq ifmr;
111 	int *media_list, i;
112 	int xmedia = 1;
113 
114 	(void) memset(&ifmr, 0, sizeof(ifmr));
115 	(void) strncpy(ifmr.ifm_name, name, sizeof(ifmr.ifm_name));
116 
117 	/*
118 	 * Check if interface supports extended media types.
119 	 */
120 	if (ioctl(s, SIOCGIFXMEDIA, (caddr_t)&ifmr) < 0)
121 		xmedia = 0;
122 	if (xmedia == 0 && ioctl(s, SIOCGIFMEDIA, (caddr_t)&ifmr) < 0) {
123 		/*
124 		 * Interface doesn't support SIOC{G,S}IFMEDIA.
125 		 */
126 		return;
127 	}
128 
129 	if (ifmr.ifm_count == 0) {
130 		warnx("%s: no media types?", name);
131 		return;
132 	}
133 
134 	media_list = (int *)malloc(ifmr.ifm_count * sizeof(int));
135 	if (media_list == NULL)
136 		err(1, "malloc");
137 	ifmr.ifm_ulist = media_list;
138 
139 	if (xmedia) {
140 		if (ioctl(s, SIOCGIFXMEDIA, (caddr_t)&ifmr) < 0)
141 			err(1, "SIOCGIFXMEDIA");
142 	} else {
143 		if (ioctl(s, SIOCGIFMEDIA, (caddr_t)&ifmr) < 0)
144 			err(1, "SIOCGIFMEDIA");
145 	}
146 
147 	printf("\tmedia: ");
148 	print_media_word(ifmr.ifm_current, 1);
149 	if (ifmr.ifm_active != ifmr.ifm_current) {
150 		putchar(' ');
151 		putchar('(');
152 		print_media_word(ifmr.ifm_active, 0);
153 		putchar(')');
154 	}
155 
156 	putchar('\n');
157 
158 	if (ifmr.ifm_status & IFM_AVALID) {
159 		printf("\tstatus: ");
160 		switch (IFM_TYPE(ifmr.ifm_active)) {
161 		case IFM_ETHER:
162 		case IFM_ATM:
163 			if (ifmr.ifm_status & IFM_ACTIVE)
164 				printf("active");
165 			else
166 				printf("no carrier");
167 			break;
168 
169 		case IFM_FDDI:
170 		case IFM_TOKEN:
171 			if (ifmr.ifm_status & IFM_ACTIVE)
172 				printf("inserted");
173 			else
174 				printf("no ring");
175 			break;
176 
177 		case IFM_IEEE80211:
178 			if (ifmr.ifm_status & IFM_ACTIVE) {
179 				/* NB: only sta mode associates */
180 				if (IFM_OPMODE(ifmr.ifm_active) == IFM_IEEE80211_STA)
181 					printf("associated");
182 				else
183 					printf("running");
184 			} else
185 				printf("no carrier");
186 			break;
187 		}
188 		putchar('\n');
189 	}
190 
191 	if (ifmr.ifm_count > 0 && supmedia) {
192 		printf("\tsupported media:\n");
193 		for (i = 0; i < ifmr.ifm_count; i++) {
194 			printf("\t\t");
195 			print_media_word_ifconfig(media_list[i]);
196 			putchar('\n');
197 		}
198 	}
199 
200 	free(media_list);
201 }
202 
203 struct ifmediareq *
204 ifmedia_getstate(int s)
205 {
206 	static struct ifmediareq *ifmr = NULL;
207 	int *mwords;
208 	int xmedia = 1;
209 
210 	if (ifmr == NULL) {
211 		ifmr = (struct ifmediareq *)malloc(sizeof(struct ifmediareq));
212 		if (ifmr == NULL)
213 			err(1, "malloc");
214 
215 		(void) memset(ifmr, 0, sizeof(struct ifmediareq));
216 		(void) strncpy(ifmr->ifm_name, name,
217 		    sizeof(ifmr->ifm_name));
218 
219 		ifmr->ifm_count = 0;
220 		ifmr->ifm_ulist = NULL;
221 
222 		/*
223 		 * We must go through the motions of reading all
224 		 * supported media because we need to know both
225 		 * the current media type and the top-level type.
226 		 */
227 
228 		if (ioctl(s, SIOCGIFXMEDIA, (caddr_t)ifmr) < 0) {
229 			xmedia = 0;
230 		}
231 		if (xmedia == 0 && ioctl(s, SIOCGIFMEDIA, (caddr_t)ifmr) < 0) {
232 			err(1, "SIOCGIFMEDIA");
233 		}
234 
235 		if (ifmr->ifm_count == 0)
236 			errx(1, "%s: no media types?", name);
237 
238 		mwords = (int *)malloc(ifmr->ifm_count * sizeof(int));
239 		if (mwords == NULL)
240 			err(1, "malloc");
241 
242 		ifmr->ifm_ulist = mwords;
243 		if (xmedia) {
244 			if (ioctl(s, SIOCGIFXMEDIA, (caddr_t)ifmr) < 0)
245 				err(1, "SIOCGIFXMEDIA");
246 		} else {
247 			if (ioctl(s, SIOCGIFMEDIA, (caddr_t)ifmr) < 0)
248 				err(1, "SIOCGIFMEDIA");
249 		}
250 	}
251 
252 	return ifmr;
253 }
254 
255 static void
256 setifmediacallback(int s, void *arg)
257 {
258 	struct ifmediareq *ifmr = (struct ifmediareq *)arg;
259 	static int did_it = 0;
260 
261 	if (!did_it) {
262 		ifr.ifr_media = ifmr->ifm_current;
263 		if (ioctl(s, SIOCSIFMEDIA, (caddr_t)&ifr) < 0)
264 			err(1, "SIOCSIFMEDIA (media)");
265 		free(ifmr->ifm_ulist);
266 		free(ifmr);
267 		did_it = 1;
268 	}
269 }
270 
271 static void
272 setmedia(const char *val, int d, int s, const struct afswtch *afp)
273 {
274 	struct ifmediareq *ifmr;
275 	int subtype;
276 
277 	ifmr = ifmedia_getstate(s);
278 
279 	/*
280 	 * We are primarily concerned with the top-level type.
281 	 * However, "current" may be only IFM_NONE, so we just look
282 	 * for the top-level type in the first "supported type"
283 	 * entry.
284 	 *
285 	 * (I'm assuming that all supported media types for a given
286 	 * interface will be the same top-level type..)
287 	 */
288 	subtype = get_media_subtype(IFM_TYPE(ifmr->ifm_ulist[0]), val);
289 
290 	strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
291 	ifr.ifr_media = (ifmr->ifm_current & IFM_IMASK) |
292 	    IFM_TYPE(ifmr->ifm_ulist[0]) | subtype;
293 
294 	ifmr->ifm_current = ifr.ifr_media;
295 	callback_register(setifmediacallback, (void *)ifmr);
296 }
297 
298 static void
299 setmediaopt(const char *val, int d, int s, const struct afswtch *afp)
300 {
301 
302 	domediaopt(val, 0, s);
303 }
304 
305 static void
306 unsetmediaopt(const char *val, int d, int s, const struct afswtch *afp)
307 {
308 
309 	domediaopt(val, 1, s);
310 }
311 
312 static void
313 domediaopt(const char *val, int clear, int s)
314 {
315 	struct ifmediareq *ifmr;
316 	int options;
317 
318 	ifmr = ifmedia_getstate(s);
319 
320 	options = get_media_options(IFM_TYPE(ifmr->ifm_ulist[0]), val);
321 
322 	strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
323 	ifr.ifr_media = ifmr->ifm_current;
324 	if (clear)
325 		ifr.ifr_media &= ~options;
326 	else {
327 		if (options & IFM_HDX) {
328 			ifr.ifr_media &= ~IFM_FDX;
329 			options &= ~IFM_HDX;
330 		}
331 		ifr.ifr_media |= options;
332 	}
333 	ifmr->ifm_current = ifr.ifr_media;
334 	callback_register(setifmediacallback, (void *)ifmr);
335 }
336 
337 static void
338 setmediainst(const char *val, int d, int s, const struct afswtch *afp)
339 {
340 	struct ifmediareq *ifmr;
341 	int inst;
342 
343 	ifmr = ifmedia_getstate(s);
344 
345 	inst = atoi(val);
346 	if (inst < 0 || inst > (int)IFM_INST_MAX)
347 		errx(1, "invalid media instance: %s", val);
348 
349 	strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
350 	ifr.ifr_media = (ifmr->ifm_current & ~IFM_IMASK) | inst << IFM_ISHIFT;
351 
352 	ifmr->ifm_current = ifr.ifr_media;
353 	callback_register(setifmediacallback, (void *)ifmr);
354 }
355 
356 static void
357 setmediamode(const char *val, int d, int s, const struct afswtch *afp)
358 {
359 	struct ifmediareq *ifmr;
360 	int mode;
361 
362 	ifmr = ifmedia_getstate(s);
363 
364 	mode = get_media_mode(IFM_TYPE(ifmr->ifm_ulist[0]), val);
365 
366 	strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
367 	ifr.ifr_media = (ifmr->ifm_current & ~IFM_MMASK) | mode;
368 
369 	ifmr->ifm_current = ifr.ifr_media;
370 	callback_register(setifmediacallback, (void *)ifmr);
371 }
372 
373 /**********************************************************************
374  * A good chunk of this is duplicated from sys/net/ifmedia.c
375  **********************************************************************/
376 
377 static struct ifmedia_description ifm_type_descriptions[] =
378     IFM_TYPE_DESCRIPTIONS;
379 
380 static struct ifmedia_description ifm_subtype_ethernet_descriptions[] =
381     IFM_SUBTYPE_ETHERNET_DESCRIPTIONS;
382 
383 static struct ifmedia_description ifm_subtype_ethernet_aliases[] =
384     IFM_SUBTYPE_ETHERNET_ALIASES;
385 
386 static struct ifmedia_description ifm_subtype_ethernet_option_descriptions[] =
387     IFM_SUBTYPE_ETHERNET_OPTION_DESCRIPTIONS;
388 
389 static struct ifmedia_description ifm_subtype_tokenring_descriptions[] =
390     IFM_SUBTYPE_TOKENRING_DESCRIPTIONS;
391 
392 static struct ifmedia_description ifm_subtype_tokenring_aliases[] =
393     IFM_SUBTYPE_TOKENRING_ALIASES;
394 
395 static struct ifmedia_description ifm_subtype_tokenring_option_descriptions[] =
396     IFM_SUBTYPE_TOKENRING_OPTION_DESCRIPTIONS;
397 
398 static struct ifmedia_description ifm_subtype_fddi_descriptions[] =
399     IFM_SUBTYPE_FDDI_DESCRIPTIONS;
400 
401 static struct ifmedia_description ifm_subtype_fddi_aliases[] =
402     IFM_SUBTYPE_FDDI_ALIASES;
403 
404 static struct ifmedia_description ifm_subtype_fddi_option_descriptions[] =
405     IFM_SUBTYPE_FDDI_OPTION_DESCRIPTIONS;
406 
407 static struct ifmedia_description ifm_subtype_ieee80211_descriptions[] =
408     IFM_SUBTYPE_IEEE80211_DESCRIPTIONS;
409 
410 static struct ifmedia_description ifm_subtype_ieee80211_aliases[] =
411     IFM_SUBTYPE_IEEE80211_ALIASES;
412 
413 static struct ifmedia_description ifm_subtype_ieee80211_option_descriptions[] =
414     IFM_SUBTYPE_IEEE80211_OPTION_DESCRIPTIONS;
415 
416 struct ifmedia_description ifm_subtype_ieee80211_mode_descriptions[] =
417     IFM_SUBTYPE_IEEE80211_MODE_DESCRIPTIONS;
418 
419 struct ifmedia_description ifm_subtype_ieee80211_mode_aliases[] =
420     IFM_SUBTYPE_IEEE80211_MODE_ALIASES;
421 
422 static struct ifmedia_description ifm_subtype_atm_descriptions[] =
423     IFM_SUBTYPE_ATM_DESCRIPTIONS;
424 
425 static struct ifmedia_description ifm_subtype_atm_aliases[] =
426     IFM_SUBTYPE_ATM_ALIASES;
427 
428 static struct ifmedia_description ifm_subtype_atm_option_descriptions[] =
429     IFM_SUBTYPE_ATM_OPTION_DESCRIPTIONS;
430 
431 static struct ifmedia_description ifm_subtype_shared_descriptions[] =
432     IFM_SUBTYPE_SHARED_DESCRIPTIONS;
433 
434 static struct ifmedia_description ifm_subtype_shared_aliases[] =
435     IFM_SUBTYPE_SHARED_ALIASES;
436 
437 static struct ifmedia_description ifm_shared_option_descriptions[] =
438     IFM_SHARED_OPTION_DESCRIPTIONS;
439 
440 static struct ifmedia_description ifm_shared_option_aliases[] =
441     IFM_SHARED_OPTION_ALIASES;
442 
443 struct ifmedia_type_to_subtype {
444 	struct {
445 		struct ifmedia_description *desc;
446 		int alias;
447 	} subtypes[5];
448 	struct {
449 		struct ifmedia_description *desc;
450 		int alias;
451 	} options[4];
452 	struct {
453 		struct ifmedia_description *desc;
454 		int alias;
455 	} modes[3];
456 };
457 
458 /* must be in the same order as IFM_TYPE_DESCRIPTIONS */
459 static struct ifmedia_type_to_subtype ifmedia_types_to_subtypes[] = {
460 	{
461 		{
462 			{ &ifm_subtype_shared_descriptions[0], 0 },
463 			{ &ifm_subtype_shared_aliases[0], 1 },
464 			{ &ifm_subtype_ethernet_descriptions[0], 0 },
465 			{ &ifm_subtype_ethernet_aliases[0], 1 },
466 			{ NULL, 0 },
467 		},
468 		{
469 			{ &ifm_shared_option_descriptions[0], 0 },
470 			{ &ifm_shared_option_aliases[0], 1 },
471 			{ &ifm_subtype_ethernet_option_descriptions[0], 0 },
472 			{ NULL, 0 },
473 		},
474 		{
475 			{ NULL, 0 },
476 		},
477 	},
478 	{
479 		{
480 			{ &ifm_subtype_shared_descriptions[0], 0 },
481 			{ &ifm_subtype_shared_aliases[0], 1 },
482 			{ &ifm_subtype_tokenring_descriptions[0], 0 },
483 			{ &ifm_subtype_tokenring_aliases[0], 1 },
484 			{ NULL, 0 },
485 		},
486 		{
487 			{ &ifm_shared_option_descriptions[0], 0 },
488 			{ &ifm_shared_option_aliases[0], 1 },
489 			{ &ifm_subtype_tokenring_option_descriptions[0], 0 },
490 			{ NULL, 0 },
491 		},
492 		{
493 			{ NULL, 0 },
494 		},
495 	},
496 	{
497 		{
498 			{ &ifm_subtype_shared_descriptions[0], 0 },
499 			{ &ifm_subtype_shared_aliases[0], 1 },
500 			{ &ifm_subtype_fddi_descriptions[0], 0 },
501 			{ &ifm_subtype_fddi_aliases[0], 1 },
502 			{ NULL, 0 },
503 		},
504 		{
505 			{ &ifm_shared_option_descriptions[0], 0 },
506 			{ &ifm_shared_option_aliases[0], 1 },
507 			{ &ifm_subtype_fddi_option_descriptions[0], 0 },
508 			{ NULL, 0 },
509 		},
510 		{
511 			{ NULL, 0 },
512 		},
513 	},
514 	{
515 		{
516 			{ &ifm_subtype_shared_descriptions[0], 0 },
517 			{ &ifm_subtype_shared_aliases[0], 1 },
518 			{ &ifm_subtype_ieee80211_descriptions[0], 0 },
519 			{ &ifm_subtype_ieee80211_aliases[0], 1 },
520 			{ NULL, 0 },
521 		},
522 		{
523 			{ &ifm_shared_option_descriptions[0], 0 },
524 			{ &ifm_shared_option_aliases[0], 1 },
525 			{ &ifm_subtype_ieee80211_option_descriptions[0], 0 },
526 			{ NULL, 0 },
527 		},
528 		{
529 			{ &ifm_subtype_ieee80211_mode_descriptions[0], 0 },
530 			{ &ifm_subtype_ieee80211_mode_aliases[0], 0 },
531 			{ NULL, 0 },
532 		},
533 	},
534 	{
535 		{
536 			{ &ifm_subtype_shared_descriptions[0], 0 },
537 			{ &ifm_subtype_shared_aliases[0], 1 },
538 			{ &ifm_subtype_atm_descriptions[0], 0 },
539 			{ &ifm_subtype_atm_aliases[0], 1 },
540 			{ NULL, 0 },
541 		},
542 		{
543 			{ &ifm_shared_option_descriptions[0], 0 },
544 			{ &ifm_shared_option_aliases[0], 1 },
545 			{ &ifm_subtype_atm_option_descriptions[0], 0 },
546 			{ NULL, 0 },
547 		},
548 		{
549 			{ NULL, 0 },
550 		},
551 	},
552 };
553 
554 static int
555 get_media_subtype(int type, const char *val)
556 {
557 	struct ifmedia_description *desc;
558 	struct ifmedia_type_to_subtype *ttos;
559 	int rval, i;
560 
561 	/* Find the top-level interface type. */
562 	for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
563 	    desc->ifmt_string != NULL; desc++, ttos++)
564 		if (type == desc->ifmt_word)
565 			break;
566 	if (desc->ifmt_string == NULL)
567 		errx(1, "unknown media type 0x%x", type);
568 
569 	for (i = 0; ttos->subtypes[i].desc != NULL; i++) {
570 		rval = lookup_media_word(ttos->subtypes[i].desc, val);
571 		if (rval != -1)
572 			return (rval);
573 	}
574 	errx(1, "unknown media subtype: %s", val);
575 	/*NOTREACHED*/
576 }
577 
578 static int
579 get_media_mode(int type, const char *val)
580 {
581 	struct ifmedia_description *desc;
582 	struct ifmedia_type_to_subtype *ttos;
583 	int rval, i;
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 mode 0x%x", type);
592 
593 	for (i = 0; ttos->modes[i].desc != NULL; i++) {
594 		rval = lookup_media_word(ttos->modes[i].desc, val);
595 		if (rval != -1)
596 			return (rval);
597 	}
598 	return -1;
599 }
600 
601 static int
602 get_media_options(int type, const char *val)
603 {
604 	struct ifmedia_description *desc;
605 	struct ifmedia_type_to_subtype *ttos;
606 	char *optlist, *optptr;
607 	int option = 0, i, rval = 0;
608 
609 	/* We muck with the string, so copy it. */
610 	optlist = strdup(val);
611 	if (optlist == NULL)
612 		err(1, "strdup");
613 
614 	/* Find the top-level interface type. */
615 	for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
616 	    desc->ifmt_string != NULL; desc++, ttos++)
617 		if (type == desc->ifmt_word)
618 			break;
619 	if (desc->ifmt_string == NULL)
620 		errx(1, "unknown media type 0x%x", type);
621 
622 	/*
623 	 * Look up the options in the user-provided comma-separated
624 	 * list.
625 	 */
626 	optptr = optlist;
627 	for (; (optptr = strtok(optptr, ",")) != NULL; optptr = NULL) {
628 		for (i = 0; ttos->options[i].desc != NULL; i++) {
629 			option = lookup_media_word(ttos->options[i].desc, optptr);
630 			if (option != -1)
631 				break;
632 		}
633 		if (option == 0)
634 			errx(1, "unknown option: %s", optptr);
635 		rval |= option;
636 	}
637 
638 	free(optlist);
639 	return (rval);
640 }
641 
642 static int
643 lookup_media_word(struct ifmedia_description *desc, const char *val)
644 {
645 
646 	for (; desc->ifmt_string != NULL; desc++)
647 		if (strcasecmp(desc->ifmt_string, val) == 0)
648 			return (desc->ifmt_word);
649 
650 	return (-1);
651 }
652 
653 static struct ifmedia_description *get_toptype_desc(int ifmw)
654 {
655 	struct ifmedia_description *desc;
656 
657 	for (desc = ifm_type_descriptions; desc->ifmt_string != NULL; desc++)
658 		if (IFM_TYPE(ifmw) == desc->ifmt_word)
659 			break;
660 
661 	return desc;
662 }
663 
664 static struct ifmedia_type_to_subtype *get_toptype_ttos(int ifmw)
665 {
666 	struct ifmedia_description *desc;
667 	struct ifmedia_type_to_subtype *ttos;
668 
669 	for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
670 	    desc->ifmt_string != NULL; desc++, ttos++)
671 		if (IFM_TYPE(ifmw) == desc->ifmt_word)
672 			break;
673 
674 	return ttos;
675 }
676 
677 static struct ifmedia_description *get_subtype_desc(int ifmw,
678     struct ifmedia_type_to_subtype *ttos)
679 {
680 	int i;
681 	struct ifmedia_description *desc;
682 
683 	for (i = 0; ttos->subtypes[i].desc != NULL; i++) {
684 		if (ttos->subtypes[i].alias)
685 			continue;
686 		for (desc = ttos->subtypes[i].desc;
687 		    desc->ifmt_string != NULL; desc++) {
688 			if (IFM_SUBTYPE(ifmw) == desc->ifmt_word)
689 				return desc;
690 		}
691 	}
692 
693 	return NULL;
694 }
695 
696 static struct ifmedia_description *get_mode_desc(int ifmw,
697     struct ifmedia_type_to_subtype *ttos)
698 {
699 	int i;
700 	struct ifmedia_description *desc;
701 
702 	for (i = 0; ttos->modes[i].desc != NULL; i++) {
703 		if (ttos->modes[i].alias)
704 			continue;
705 		for (desc = ttos->modes[i].desc;
706 		    desc->ifmt_string != NULL; desc++) {
707 			if (IFM_MODE(ifmw) == desc->ifmt_word)
708 				return desc;
709 		}
710 	}
711 
712 	return NULL;
713 }
714 
715 static void
716 print_media_word(int ifmw, int print_toptype)
717 {
718 	struct ifmedia_description *desc;
719 	struct ifmedia_type_to_subtype *ttos;
720 	int seen_option = 0, i;
721 
722 	/* Find the top-level interface type. */
723 	desc = get_toptype_desc(ifmw);
724 	ttos = get_toptype_ttos(ifmw);
725 	if (desc->ifmt_string == NULL) {
726 		printf("<unknown type>");
727 		return;
728 	} else if (print_toptype) {
729 		printf("%s", desc->ifmt_string);
730 	}
731 
732 	/*
733 	 * Don't print the top-level type; it's not like we can
734 	 * change it, or anything.
735 	 */
736 
737 	/* Find subtype. */
738 	desc = get_subtype_desc(ifmw, ttos);
739 	if (desc == NULL) {
740 		printf("<unknown subtype>");
741 		return;
742 	}
743 
744 	if (print_toptype)
745 		putchar(' ');
746 
747 	printf("%s", desc->ifmt_string);
748 
749 	if (print_toptype) {
750 		desc = get_mode_desc(ifmw, ttos);
751 		if (desc != NULL && strcasecmp("autoselect", desc->ifmt_string))
752 			printf(" mode %s", desc->ifmt_string);
753 	}
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 				if (seen_option == 0)
763 					printf(" <");
764 				printf("%s%s", seen_option++ ? "," : "",
765 				    desc->ifmt_string);
766 			}
767 		}
768 	}
769 	printf("%s", seen_option ? ">" : "");
770 
771 	if (print_toptype && IFM_INST(ifmw) != 0)
772 		printf(" instance %d", IFM_INST(ifmw));
773 }
774 
775 static void
776 print_media_word_ifconfig(int ifmw)
777 {
778 	struct ifmedia_description *desc;
779 	struct ifmedia_type_to_subtype *ttos;
780 	int seen_option = 0, i;
781 
782 	/* Find the top-level interface type. */
783 	desc = get_toptype_desc(ifmw);
784 	ttos = get_toptype_ttos(ifmw);
785 	if (desc->ifmt_string == NULL) {
786 		printf("<unknown type>");
787 		return;
788 	}
789 
790 	/*
791 	 * Don't print the top-level type; it's not like we can
792 	 * change it, or anything.
793 	 */
794 
795 	/* Find subtype. */
796 	desc = get_subtype_desc(ifmw, ttos);
797 	if (desc == NULL) {
798 		printf("<unknown subtype>");
799 		return;
800 	}
801 
802 	printf("media %s", desc->ifmt_string);
803 
804 	desc = get_mode_desc(ifmw, ttos);
805 	if (desc != NULL)
806 		printf(" mode %s", desc->ifmt_string);
807 
808 	/* Find options. */
809 	for (i = 0; ttos->options[i].desc != NULL; i++) {
810 		if (ttos->options[i].alias)
811 			continue;
812 		for (desc = ttos->options[i].desc;
813 		    desc->ifmt_string != NULL; desc++) {
814 			if (ifmw & desc->ifmt_word) {
815 				if (seen_option == 0)
816 					printf(" mediaopt ");
817 				printf("%s%s", seen_option++ ? "," : "",
818 				    desc->ifmt_string);
819 			}
820 		}
821 	}
822 
823 	if (IFM_INST(ifmw) != 0)
824 		printf(" instance %d", IFM_INST(ifmw));
825 }
826 
827 /**********************************************************************
828  * ...until here.
829  **********************************************************************/
830 
831 static struct cmd media_cmds[] = {
832 	DEF_CMD_ARG("media",	setmedia),
833 	DEF_CMD_ARG("mode",	setmediamode),
834 	DEF_CMD_ARG("mediaopt",	setmediaopt),
835 	DEF_CMD_ARG("-mediaopt",unsetmediaopt),
836 	DEF_CMD_ARG("inst",	setmediainst),
837 	DEF_CMD_ARG("instance",	setmediainst),
838 };
839 static struct afswtch af_media = {
840 	.af_name	= "af_media",
841 	.af_af		= AF_UNSPEC,
842 	.af_other_status = media_status,
843 };
844 
845 static __constructor void
846 ifmedia_ctor(void)
847 {
848 	size_t i;
849 
850 	for (i = 0; i < nitems(media_cmds);  i++)
851 		cmd_register(&media_cmds[i]);
852 	af_register(&af_media);
853 }
854