xref: /freebsd/sbin/etherswitchcfg/ifmedia.c (revision 59c8e88e72633afbc47a4ace0d2170d00d51f7dc)
1 /*	$NetBSD: ifconfig.c,v 1.34 1997/04/21 01:17:58 lukem Exp $	*/
2 
3 /*-
4  * SPDX-License-Identifier: BSD-4-Clause
5  *
6  * Copyright (c) 1997 Jason R. Thorpe.
7  * All rights reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  * 1. Redistributions of source code must retain the above copyright
13  *    notice, this list of conditions and the following disclaimer.
14  * 2. Redistributions in binary form must reproduce the above copyright
15  *    notice, this list of conditions and the following disclaimer in the
16  *    documentation and/or other materials provided with the distribution.
17  * 3. All advertising materials mentioning features or use of this software
18  *    must display the following acknowledgement:
19  *      This product includes software developed for the NetBSD Project
20  *	by Jason R. Thorpe.
21  * 4. The name of the author may not be used to endorse or promote products
22  *    derived from this software without specific prior written permission.
23  *
24  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
25  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
26  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
27  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
28  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
29  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
30  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
31  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
32  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34  * SUCH DAMAGE.
35  */
36 
37 /*
38  * Copyright (c) 1983, 1993
39  *	The Regents of the University of California.  All rights reserved.
40  *
41  * Redistribution and use in source and binary forms, with or without
42  * modification, are permitted provided that the following conditions
43  * are met:
44  * 1. Redistributions of source code must retain the above copyright
45  *    notice, this list of conditions and the following disclaimer.
46  * 2. Redistributions in binary form must reproduce the above copyright
47  *    notice, this list of conditions and the following disclaimer in the
48  *    documentation and/or other materials provided with the distribution.
49  * 4. Neither the name of the University nor the names of its contributors
50  *    may be used to endorse or promote products derived from this software
51  *    without specific prior written permission.
52  *
53  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
54  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
55  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
56  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
57  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
58  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
59  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
60  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
61  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
62  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
63  * SUCH DAMAGE.
64  */
65 /*
66  * based on sbin/ifconfig/ifmedia.c r221954
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 void	domediaopt(const char *, int, int);
91 int	get_media_subtype(int, const char *);
92 int	get_media_mode(int, const char *);
93 int	get_media_options(int, const char *);
94 int	lookup_media_word(struct ifmedia_description *, const char *);
95 void	print_media_word(int, int);
96 void	print_media_word_ifconfig(int);
97 
98 #if 0
99 static struct ifmedia_description *get_toptype_desc(int);
100 static struct ifmedia_type_to_subtype *get_toptype_ttos(int);
101 static struct ifmedia_description *get_subtype_desc(int,
102     struct ifmedia_type_to_subtype *ttos);
103 
104 #define	IFM_OPMODE(x) \
105 	((x) & (IFM_IEEE80211_ADHOC | IFM_IEEE80211_HOSTAP | \
106 	 IFM_IEEE80211_IBSS | IFM_IEEE80211_WDS | IFM_IEEE80211_MONITOR | \
107 	 IFM_IEEE80211_MBSS))
108 #define	IFM_IEEE80211_STA	0
109 
110 static void
111 media_status(int s)
112 {
113 	struct ifmediareq ifmr;
114 	int *media_list, i;
115 
116 	(void) memset(&ifmr, 0, sizeof(ifmr));
117 	(void) strncpy(ifmr.ifm_name, name, sizeof(ifmr.ifm_name));
118 
119 	if (ioctl(s, SIOCGIFMEDIA, (caddr_t)&ifmr) < 0) {
120 		/*
121 		 * Interface doesn't support SIOC{G,S}IFMEDIA.
122 		 */
123 		return;
124 	}
125 
126 	if (ifmr.ifm_count == 0) {
127 		warnx("%s: no media types?", name);
128 		return;
129 	}
130 
131 	media_list = (int *)malloc(ifmr.ifm_count * sizeof(int));
132 	if (media_list == NULL)
133 		err(1, "malloc");
134 	ifmr.ifm_ulist = media_list;
135 
136 	if (ioctl(s, SIOCGIFMEDIA, (caddr_t)&ifmr) < 0)
137 		err(1, "SIOCGIFMEDIA");
138 
139 	printf("\tmedia: ");
140 	print_media_word(ifmr.ifm_current, 1);
141 	if (ifmr.ifm_active != ifmr.ifm_current) {
142 		putchar(' ');
143 		putchar('(');
144 		print_media_word(ifmr.ifm_active, 0);
145 		putchar(')');
146 	}
147 
148 	putchar('\n');
149 
150 	if (ifmr.ifm_status & IFM_AVALID) {
151 		printf("\tstatus: ");
152 		switch (IFM_TYPE(ifmr.ifm_active)) {
153 		case IFM_ETHER:
154 		case IFM_ATM:
155 			if (ifmr.ifm_status & IFM_ACTIVE)
156 				printf("active");
157 			else
158 				printf("no carrier");
159 			break;
160 
161 		case IFM_IEEE80211:
162 			if (ifmr.ifm_status & IFM_ACTIVE) {
163 				/* NB: only sta mode associates */
164 				if (IFM_OPMODE(ifmr.ifm_active) == IFM_IEEE80211_STA)
165 					printf("associated");
166 				else
167 					printf("running");
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_IMASK) |
267 	    IFM_TYPE(ifmr->ifm_ulist[0]) | subtype;
268 
269 	ifmr->ifm_current = ifr.ifr_media;
270 	callback_register(setifmediacallback, (void *)ifmr);
271 }
272 
273 static void
274 setmediaopt(const char *val, int d, int s, const struct afswtch *afp)
275 {
276 
277 	domediaopt(val, 0, s);
278 }
279 
280 static void
281 unsetmediaopt(const char *val, int d, int s, const struct afswtch *afp)
282 {
283 
284 	domediaopt(val, 1, s);
285 }
286 
287 static void
288 domediaopt(const char *val, int clear, int s)
289 {
290 	struct ifmediareq *ifmr;
291 	int options;
292 
293 	ifmr = ifmedia_getstate(s);
294 
295 	options = get_media_options(IFM_TYPE(ifmr->ifm_ulist[0]), val);
296 
297 	strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
298 	ifr.ifr_media = ifmr->ifm_current;
299 	if (clear)
300 		ifr.ifr_media &= ~options;
301 	else {
302 		if (options & IFM_HDX) {
303 			ifr.ifr_media &= ~IFM_FDX;
304 			options &= ~IFM_HDX;
305 		}
306 		ifr.ifr_media |= options;
307 	}
308 	ifmr->ifm_current = ifr.ifr_media;
309 	callback_register(setifmediacallback, (void *)ifmr);
310 }
311 
312 static void
313 setmediainst(const char *val, int d, int s, const struct afswtch *afp)
314 {
315 	struct ifmediareq *ifmr;
316 	int inst;
317 
318 	ifmr = ifmedia_getstate(s);
319 
320 	inst = atoi(val);
321 	if (inst < 0 || inst > (int)IFM_INST_MAX)
322 		errx(1, "invalid media instance: %s", val);
323 
324 	strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
325 	ifr.ifr_media = (ifmr->ifm_current & ~IFM_IMASK) | inst << IFM_ISHIFT;
326 
327 	ifmr->ifm_current = ifr.ifr_media;
328 	callback_register(setifmediacallback, (void *)ifmr);
329 }
330 
331 static void
332 setmediamode(const char *val, int d, int s, const struct afswtch *afp)
333 {
334 	struct ifmediareq *ifmr;
335 	int mode;
336 
337 	ifmr = ifmedia_getstate(s);
338 
339 	mode = get_media_mode(IFM_TYPE(ifmr->ifm_ulist[0]), val);
340 
341 	strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
342 	ifr.ifr_media = (ifmr->ifm_current & ~IFM_MMASK) | mode;
343 
344 	ifmr->ifm_current = ifr.ifr_media;
345 	callback_register(setifmediacallback, (void *)ifmr);
346 }
347 #endif
348 
349 /**********************************************************************
350  * A good chunk of this is duplicated from sys/net/ifmedia.c
351  **********************************************************************/
352 
353 static struct ifmedia_description ifm_type_descriptions[] =
354     IFM_TYPE_DESCRIPTIONS;
355 
356 static struct ifmedia_description ifm_subtype_ethernet_descriptions[] =
357     IFM_SUBTYPE_ETHERNET_DESCRIPTIONS;
358 
359 static struct ifmedia_description ifm_subtype_ethernet_aliases[] =
360     IFM_SUBTYPE_ETHERNET_ALIASES;
361 
362 static struct ifmedia_description ifm_subtype_ethernet_option_descriptions[] =
363     IFM_SUBTYPE_ETHERNET_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 static struct ifmedia_description ifm_subtype_ieee80211_mode_descriptions[] =
375     IFM_SUBTYPE_IEEE80211_MODE_DESCRIPTIONS;
376 
377 static 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 static struct ifmedia_description ifm_shared_option_aliases[] =
399     IFM_SHARED_OPTION_ALIASES;
400 
401 struct ifmedia_type_to_subtype {
402 	struct {
403 		struct ifmedia_description *desc;
404 		int alias;
405 	} subtypes[5];
406 	struct {
407 		struct ifmedia_description *desc;
408 		int alias;
409 	} options[4];
410 	struct {
411 		struct ifmedia_description *desc;
412 		int alias;
413 	} modes[3];
414 };
415 
416 /* must be in the same order as IFM_TYPE_DESCRIPTIONS */
417 static struct ifmedia_type_to_subtype ifmedia_types_to_subtypes[] = {
418 	{
419 		{
420 			{ &ifm_subtype_shared_descriptions[0], 0 },
421 			{ &ifm_subtype_shared_aliases[0], 1 },
422 			{ &ifm_subtype_ethernet_descriptions[0], 0 },
423 			{ &ifm_subtype_ethernet_aliases[0], 1 },
424 			{ NULL, 0 },
425 		},
426 		{
427 			{ &ifm_shared_option_descriptions[0], 0 },
428 			{ &ifm_shared_option_aliases[0], 1 },
429 			{ &ifm_subtype_ethernet_option_descriptions[0], 0 },
430 			{ NULL, 0 },
431 		},
432 		{
433 			{ NULL, 0 },
434 		},
435 	},
436 	{
437 		{
438 			{ &ifm_subtype_shared_descriptions[0], 0 },
439 			{ &ifm_subtype_shared_aliases[0], 1 },
440 			{ &ifm_subtype_ieee80211_descriptions[0], 0 },
441 			{ &ifm_subtype_ieee80211_aliases[0], 1 },
442 			{ NULL, 0 },
443 		},
444 		{
445 			{ &ifm_shared_option_descriptions[0], 0 },
446 			{ &ifm_shared_option_aliases[0], 1 },
447 			{ &ifm_subtype_ieee80211_option_descriptions[0], 0 },
448 			{ NULL, 0 },
449 		},
450 		{
451 			{ &ifm_subtype_ieee80211_mode_descriptions[0], 0 },
452 			{ &ifm_subtype_ieee80211_mode_aliases[0], 0 },
453 			{ NULL, 0 },
454 		},
455 	},
456 	{
457 		{
458 			{ &ifm_subtype_shared_descriptions[0], 0 },
459 			{ &ifm_subtype_shared_aliases[0], 1 },
460 			{ &ifm_subtype_atm_descriptions[0], 0 },
461 			{ &ifm_subtype_atm_aliases[0], 1 },
462 			{ NULL, 0 },
463 		},
464 		{
465 			{ &ifm_shared_option_descriptions[0], 0 },
466 			{ &ifm_shared_option_aliases[0], 1 },
467 			{ &ifm_subtype_atm_option_descriptions[0], 0 },
468 			{ NULL, 0 },
469 		},
470 		{
471 			{ NULL, 0 },
472 		},
473 	},
474 };
475 
476 int
477 get_media_subtype(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 type 0x%x", type);
490 
491 	for (i = 0; ttos->subtypes[i].desc != NULL; i++) {
492 		rval = lookup_media_word(ttos->subtypes[i].desc, val);
493 		if (rval != -1)
494 			return (rval);
495 	}
496 	errx(1, "unknown media subtype: %s", val);
497 	/*NOTREACHED*/
498 }
499 
500 int
501 get_media_mode(int type, const char *val)
502 {
503 	struct ifmedia_description *desc;
504 	struct ifmedia_type_to_subtype *ttos;
505 	int rval, i;
506 
507 	/* Find the top-level interface type. */
508 	for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
509 	    desc->ifmt_string != NULL; desc++, ttos++)
510 		if (type == desc->ifmt_word)
511 			break;
512 	if (desc->ifmt_string == NULL)
513 		errx(1, "unknown media mode 0x%x", type);
514 
515 	for (i = 0; ttos->modes[i].desc != NULL; i++) {
516 		rval = lookup_media_word(ttos->modes[i].desc, val);
517 		if (rval != -1)
518 			return (rval);
519 	}
520 	return -1;
521 }
522 
523 int
524 get_media_options(int type, const char *val)
525 {
526 	struct ifmedia_description *desc;
527 	struct ifmedia_type_to_subtype *ttos;
528 	char *optlist, *optptr;
529 	int option = 0, i, rval = 0;
530 
531 	/* We muck with the string, so copy it. */
532 	optlist = strdup(val);
533 	if (optlist == NULL)
534 		err(1, "strdup");
535 
536 	/* Find the top-level interface type. */
537 	for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
538 	    desc->ifmt_string != NULL; desc++, ttos++)
539 		if (type == desc->ifmt_word)
540 			break;
541 	if (desc->ifmt_string == NULL)
542 		errx(1, "unknown media type 0x%x", type);
543 
544 	/*
545 	 * Look up the options in the user-provided comma-separated
546 	 * list.
547 	 */
548 	optptr = optlist;
549 	for (; (optptr = strtok(optptr, ",")) != NULL; optptr = NULL) {
550 		for (i = 0; ttos->options[i].desc != NULL; i++) {
551 			option = lookup_media_word(ttos->options[i].desc, optptr);
552 			if (option != -1)
553 				break;
554 		}
555 		if (option == 0)
556 			errx(1, "unknown option: %s", optptr);
557 		rval |= option;
558 	}
559 
560 	free(optlist);
561 	return (rval);
562 }
563 
564 int
565 lookup_media_word(struct ifmedia_description *desc, const char *val)
566 {
567 
568 	for (; desc->ifmt_string != NULL; desc++)
569 		if (strcasecmp(desc->ifmt_string, val) == 0)
570 			return (desc->ifmt_word);
571 
572 	return (-1);
573 }
574 
575 static struct ifmedia_description *get_toptype_desc(int ifmw)
576 {
577 	struct ifmedia_description *desc;
578 
579 	for (desc = ifm_type_descriptions; desc->ifmt_string != NULL; desc++)
580 		if (IFM_TYPE(ifmw) == desc->ifmt_word)
581 			break;
582 
583 	return desc;
584 }
585 
586 static struct ifmedia_type_to_subtype *get_toptype_ttos(int ifmw)
587 {
588 	struct ifmedia_description *desc;
589 	struct ifmedia_type_to_subtype *ttos;
590 
591 	for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
592 	    desc->ifmt_string != NULL; desc++, ttos++)
593 		if (IFM_TYPE(ifmw) == desc->ifmt_word)
594 			break;
595 
596 	return ttos;
597 }
598 
599 static struct ifmedia_description *get_subtype_desc(int ifmw,
600     struct ifmedia_type_to_subtype *ttos)
601 {
602 	int i;
603 	struct ifmedia_description *desc;
604 
605 	for (i = 0; ttos->subtypes[i].desc != NULL; i++) {
606 		if (ttos->subtypes[i].alias)
607 			continue;
608 		for (desc = ttos->subtypes[i].desc;
609 		    desc->ifmt_string != NULL; desc++) {
610 			if (IFM_SUBTYPE(ifmw) == desc->ifmt_word)
611 				return desc;
612 		}
613 	}
614 
615 	return NULL;
616 }
617 
618 static struct ifmedia_description *get_mode_desc(int ifmw,
619     struct ifmedia_type_to_subtype *ttos)
620 {
621 	int i;
622 	struct ifmedia_description *desc;
623 
624 	for (i = 0; ttos->modes[i].desc != NULL; i++) {
625 		if (ttos->modes[i].alias)
626 			continue;
627 		for (desc = ttos->modes[i].desc;
628 		    desc->ifmt_string != NULL; desc++) {
629 			if (IFM_MODE(ifmw) == desc->ifmt_word)
630 				return desc;
631 		}
632 	}
633 
634 	return NULL;
635 }
636 
637 void
638 print_media_word(int ifmw, int print_toptype)
639 {
640 	struct ifmedia_description *desc;
641 	struct ifmedia_type_to_subtype *ttos;
642 	int seen_option = 0, i;
643 
644 	/* Find the top-level interface type. */
645 	desc = get_toptype_desc(ifmw);
646 	ttos = get_toptype_ttos(ifmw);
647 	if (desc->ifmt_string == NULL) {
648 		printf("<unknown type>");
649 		return;
650 	} else if (print_toptype) {
651 		printf("%s", desc->ifmt_string);
652 	}
653 
654 	/*
655 	 * Don't print the top-level type; it's not like we can
656 	 * change it, or anything.
657 	 */
658 
659 	/* Find subtype. */
660 	desc = get_subtype_desc(ifmw, ttos);
661 	if (desc == NULL) {
662 		printf("<unknown subtype>");
663 		return;
664 	}
665 
666 	if (print_toptype)
667 		putchar(' ');
668 
669 	printf("%s", desc->ifmt_string);
670 
671 	if (print_toptype) {
672 		desc = get_mode_desc(ifmw, ttos);
673 		if (desc != NULL && strcasecmp("autoselect", desc->ifmt_string))
674 			printf(" mode %s", desc->ifmt_string);
675 	}
676 
677 	/* Find options. */
678 	for (i = 0; ttos->options[i].desc != NULL; i++) {
679 		if (ttos->options[i].alias)
680 			continue;
681 		for (desc = ttos->options[i].desc;
682 		    desc->ifmt_string != NULL; desc++) {
683 			if (ifmw & desc->ifmt_word) {
684 				if (seen_option == 0)
685 					printf(" <");
686 				printf("%s%s", seen_option++ ? "," : "",
687 				    desc->ifmt_string);
688 			}
689 		}
690 	}
691 	printf("%s", seen_option ? ">" : "");
692 
693 	if (print_toptype && IFM_INST(ifmw) != 0)
694 		printf(" instance %d", IFM_INST(ifmw));
695 }
696 
697 void
698 print_media_word_ifconfig(int ifmw)
699 {
700 	struct ifmedia_description *desc;
701 	struct ifmedia_type_to_subtype *ttos;
702 	int seen_option = 0, i;
703 
704 	/* Find the top-level interface type. */
705 	desc = get_toptype_desc(ifmw);
706 	ttos = get_toptype_ttos(ifmw);
707 	if (desc->ifmt_string == NULL) {
708 		printf("<unknown type>");
709 		return;
710 	}
711 
712 	/*
713 	 * Don't print the top-level type; it's not like we can
714 	 * change it, or anything.
715 	 */
716 
717 	/* Find subtype. */
718 	desc = get_subtype_desc(ifmw, ttos);
719 	if (desc == NULL) {
720 		printf("<unknown subtype>");
721 		return;
722 	}
723 
724 	printf("media %s", desc->ifmt_string);
725 
726 	desc = get_mode_desc(ifmw, ttos);
727 	if (desc != NULL)
728 		printf(" mode %s", desc->ifmt_string);
729 
730 	/* Find options. */
731 	for (i = 0; ttos->options[i].desc != NULL; i++) {
732 		if (ttos->options[i].alias)
733 			continue;
734 		for (desc = ttos->options[i].desc;
735 		    desc->ifmt_string != NULL; desc++) {
736 			if (ifmw & desc->ifmt_word) {
737 				if (seen_option == 0)
738 					printf(" mediaopt ");
739 				printf("%s%s", seen_option++ ? "," : "",
740 				    desc->ifmt_string);
741 			}
742 		}
743 	}
744 
745 	if (IFM_INST(ifmw) != 0)
746 		printf(" instance %d", IFM_INST(ifmw));
747 }
748 
749 /**********************************************************************
750  * ...until here.
751  **********************************************************************/
752