xref: /dragonfly/sbin/ifconfig/ifmedia.c (revision 5c694678)
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 	int xmedia = 1;
107 
108 	memset(&ifmr, 0, sizeof(ifmr));
109 	strlcpy(ifmr.ifm_name, IfName, sizeof(ifmr.ifm_name));
110 
111 	/*
112 	 * Check if interface supports extended media types.
113 	 */
114 	if (ioctl(s, SIOCGIFXMEDIA, &ifmr) < 0)
115 		xmedia = 0;
116 	if (xmedia == 0 && ioctl(s, SIOCGIFMEDIA, &ifmr) < 0) {
117 		/*
118 		 * Interface doesn't support SIOC{G,S}IFMEDIA.
119 		 */
120 		return;
121 	}
122 
123 	if (ifmr.ifm_count == 0) {
124 		warnx("%s: no media types?", IfName);
125 		return;
126 	}
127 
128 	media_list = malloc(ifmr.ifm_count * sizeof(int));
129 	if (media_list == NULL)
130 		err(1, "malloc");
131 	ifmr.ifm_ulist = media_list;
132 
133 	if (xmedia) {
134 		if (ioctl(s, SIOCGIFXMEDIA, &ifmr) < 0)
135 			err(1, "SIOCGIFXMEDIA");
136 	} else {
137 		if (ioctl(s, SIOCGIFMEDIA, &ifmr) < 0)
138 			err(1, "SIOCGIFMEDIA");
139 	}
140 
141 	printf("\tmedia: ");
142 	print_media_word(ifmr.ifm_current, 1);
143 	if (ifmr.ifm_active != ifmr.ifm_current) {
144 		putchar(' ');
145 		putchar('(');
146 		print_media_word(ifmr.ifm_active, 0);
147 		putchar(')');
148 	}
149 
150 	putchar('\n');
151 
152 	if (ifmr.ifm_status & IFM_AVALID) {
153 		printf("\tstatus: ");
154 		switch (IFM_TYPE(ifmr.ifm_active)) {
155 		case IFM_ETHER:
156 			if (ifmr.ifm_status & IFM_ACTIVE)
157 				printf("active");
158 			else
159 				printf("no carrier");
160 			break;
161 
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_IEEE80211:
170 			/* XXX: Different value for adhoc? */
171 			if (ifmr.ifm_status & IFM_ACTIVE)
172 				printf("associated");
173 			else
174 				printf("no carrier");
175 			break;
176 		case IFM_CARP:
177 			if (ifmr.ifm_status & IFM_ACTIVE)
178 				printf("master");
179 			else
180 				printf("backup");
181 			break;
182 		}
183 		putchar('\n');
184 	}
185 
186 	if (ifmr.ifm_count > 0 && supmedia) {
187 		printf("\tsupported media:\n");
188 		for (i = 0; i < ifmr.ifm_count; i++) {
189 			printf("\t\t");
190 			print_media_word_ifconfig(media_list[i]);
191 			putchar('\n');
192 		}
193 	}
194 
195 	free(media_list);
196 }
197 
198 struct ifmediareq *
199 ifmedia_getstate(int s)
200 {
201 	static struct ifmediareq *ifmr = NULL;
202 	int *mwords;
203 	int xmedia = 1;
204 
205 	if (ifmr == NULL) {
206 		ifmr = malloc(sizeof(struct ifmediareq));
207 		if (ifmr == NULL)
208 			err(1, "malloc");
209 
210 		memset(ifmr, 0, sizeof(struct ifmediareq));
211 		strlcpy(ifmr->ifm_name, IfName, sizeof(ifmr->ifm_name));
212 
213 		ifmr->ifm_count = 0;
214 		ifmr->ifm_ulist = NULL;
215 
216 		/*
217 		 * We must go through the motions of reading all
218 		 * supported media because we need to know both
219 		 * the current media type and the top-level type.
220 		 */
221 
222 		if (ioctl(s, SIOCGIFXMEDIA, ifmr) < 0)
223 			xmedia = 0;
224 		if (xmedia == 0 && ioctl(s, SIOCGIFMEDIA, ifmr) < 0)
225 			err(1, "SIOCGIFMEDIA");
226 
227 		if (ifmr->ifm_count == 0)
228 			errx(1, "%s: no media types?", IfName);
229 
230 		mwords = malloc(ifmr->ifm_count * sizeof(int));
231 		if (mwords == NULL)
232 			err(1, "malloc");
233 
234 		ifmr->ifm_ulist = mwords;
235 		if (xmedia) {
236 			if (ioctl(s, SIOCGIFXMEDIA, ifmr) < 0)
237 				err(1, "SIOCGIFXMEDIA");
238 		} else {
239 			if (ioctl(s, SIOCGIFMEDIA, ifmr) < 0)
240 				err(1, "SIOCGIFMEDIA");
241 		}
242 	}
243 
244 	return ifmr;
245 }
246 
247 static void
248 setifmediacallback(int s, void *arg)
249 {
250 	static int did_it = 0;
251 	struct ifmediareq *ifmr = arg;
252 	struct ifreq ifr;
253 
254 	if (!did_it) {
255 		memset(&ifr, 0, sizeof(ifr));
256 		strlcpy(ifr.ifr_name, IfName, sizeof(ifr.ifr_name));
257 		ifr.ifr_media = ifmr->ifm_current;
258 		if (ioctl(s, SIOCSIFMEDIA, &ifr) < 0)
259 			err(1, "SIOCSIFMEDIA (media)");
260 		free(ifmr->ifm_ulist);
261 		free(ifmr);
262 		did_it = 1;
263 	}
264 }
265 
266 static void
267 setmedia(const char *val, int d __unused, int s,
268 	 const struct afswtch *afp __unused)
269 {
270 	struct ifmediareq *ifmr;
271 	int subtype;
272 
273 	ifmr = ifmedia_getstate(s);
274 
275 	/*
276 	 * We are primarily concerned with the top-level type.
277 	 * However, "current" may be only IFM_NONE, so we just look
278 	 * for the top-level type in the first "supported type"
279 	 * entry.
280 	 *
281 	 * (I'm assuming that all supported media types for a given
282 	 * interface will be the same top-level type..)
283 	 */
284 	subtype = get_media_subtype(IFM_TYPE(ifmr->ifm_ulist[0]), val);
285 
286 	ifmr->ifm_current = (ifmr->ifm_current & ~(IFM_NMASK|IFM_TMASK)) |
287 			    IFM_TYPE(ifmr->ifm_ulist[0]) |
288 			    subtype;
289 	if ((ifmr->ifm_current & IFM_TMASK) == 0)
290 		ifmr->ifm_current &= ~IFM_GMASK;
291 
292 	callback_register(setifmediacallback, ifmr);
293 }
294 
295 static void
296 setmediaopt(const char *val, int d __unused, int s,
297 	    const struct afswtch *afp __unused)
298 {
299 	domediaopt(val, 0, s);
300 }
301 
302 static void
303 unsetmediaopt(const char *val, int d __unused, int s,
304 	      const struct afswtch *afp __unused)
305 {
306 	domediaopt(val, 1, s);
307 }
308 
309 static void
310 domediaopt(const char *val, int clear, int s)
311 {
312 	struct ifmediareq *ifmr;
313 	int options;
314 
315 	ifmr = ifmedia_getstate(s);
316 
317 	options = get_media_options(IFM_TYPE(ifmr->ifm_ulist[0]), val);
318 	if (clear)
319 		ifmr->ifm_current &= ~options;
320 	else
321 		ifmr->ifm_current |= options;
322 
323 	callback_register(setifmediacallback, ifmr);
324 }
325 
326 
327 static void
328 setmediamode(const char *val, int d __unused, int s,
329 	     const struct afswtch *afp __unused)
330 {
331 	struct ifmediareq *ifmr;
332 	int mode;
333 
334 	ifmr = ifmedia_getstate(s);
335 
336 	mode = get_media_mode(IFM_TYPE(ifmr->ifm_ulist[0]), val);
337 	ifmr->ifm_current = (ifmr->ifm_current & ~IFM_MMASK) | mode;
338 
339 	callback_register(setifmediacallback, ifmr);
340 }
341 
342 /**********************************************************************
343  * A good chunk of this is duplicated from sys/net/ifmedia.c
344  **********************************************************************/
345 
346 static struct ifmedia_description ifm_type_descriptions[] =
347     IFM_TYPE_DESCRIPTIONS;
348 
349 static struct ifmedia_description ifm_subtype_ethernet_descriptions[] =
350     IFM_SUBTYPE_ETHERNET_DESCRIPTIONS;
351 
352 static struct ifmedia_description ifm_subtype_ethernet_aliases[] =
353     IFM_SUBTYPE_ETHERNET_ALIASES;
354 
355 static struct ifmedia_description ifm_subtype_ethernet_option_descriptions[] =
356     IFM_SUBTYPE_ETHERNET_OPTION_DESCRIPTIONS;
357 
358 static struct ifmedia_description ifm_subtype_ethernet_option_alias[] =
359     IFM_SUBTYPE_ETHERNET_OPTION_ALIAS;
360 
361 static struct ifmedia_description ifm_subtype_ieee80211_descriptions[] =
362     IFM_SUBTYPE_IEEE80211_DESCRIPTIONS;
363 
364 static struct ifmedia_description ifm_subtype_ieee80211_aliases[] =
365     IFM_SUBTYPE_IEEE80211_ALIASES;
366 
367 static struct ifmedia_description ifm_subtype_ieee80211_option_descriptions[] =
368     IFM_SUBTYPE_IEEE80211_OPTION_DESCRIPTIONS;
369 
370 struct ifmedia_description ifm_subtype_ieee80211_mode_descriptions[] =
371     IFM_SUBTYPE_IEEE80211_MODE_DESCRIPTIONS;
372 
373 struct ifmedia_description ifm_subtype_ieee80211_mode_aliases[] =
374     IFM_SUBTYPE_IEEE80211_MODE_ALIASES;
375 
376 static struct ifmedia_description ifm_subtype_atm_descriptions[] =
377     IFM_SUBTYPE_ATM_DESCRIPTIONS;
378 
379 static struct ifmedia_description ifm_subtype_atm_aliases[] =
380     IFM_SUBTYPE_ATM_ALIASES;
381 
382 static struct ifmedia_description ifm_subtype_atm_option_descriptions[] =
383     IFM_SUBTYPE_ATM_OPTION_DESCRIPTIONS;
384 
385 static struct ifmedia_description ifm_subtype_shared_descriptions[] =
386     IFM_SUBTYPE_SHARED_DESCRIPTIONS;
387 
388 static struct ifmedia_description ifm_subtype_shared_aliases[] =
389     IFM_SUBTYPE_SHARED_ALIASES;
390 
391 static struct ifmedia_description ifm_shared_option_descriptions[] =
392     IFM_SHARED_OPTION_DESCRIPTIONS;
393 
394 struct ifmedia_type_to_subtype {
395 	struct {
396 		struct ifmedia_description *desc;
397 		int alias;
398 	} subtypes[5];
399 	struct {
400 		struct ifmedia_description *desc;
401 		int alias;
402 	} options[4];
403 	struct {
404 		struct ifmedia_description *desc;
405 		int alias;
406 	} modes[3];
407 };
408 
409 /* must be in the same order as IFM_TYPE_DESCRIPTIONS */
410 static struct ifmedia_type_to_subtype ifmedia_types_to_subtypes[] = {
411 	{
412 		{
413 			{ &ifm_subtype_shared_descriptions[0], 0 },
414 			{ &ifm_subtype_shared_aliases[0], 1 },
415 			{ &ifm_subtype_ethernet_descriptions[0], 0 },
416 			{ &ifm_subtype_ethernet_aliases[0], 1 },
417 			{ NULL, 0 },
418 		},
419 		{
420 			{ &ifm_shared_option_descriptions[0], 0 },
421 			{ &ifm_subtype_ethernet_option_descriptions[0], 0 },
422 			{ &ifm_subtype_ethernet_option_alias[0], 1 },
423 			{ NULL, 0 },
424 		},
425 		{
426 			{ NULL, 0 },
427 		},
428 	},
429 	{
430 		{
431 			{ &ifm_subtype_shared_descriptions[0], 0 },
432 			{ &ifm_subtype_shared_aliases[0], 1 },
433 			{ &ifm_subtype_ieee80211_descriptions[0], 0 },
434 			{ &ifm_subtype_ieee80211_aliases[0], 1 },
435 			{ NULL, 0 },
436 		},
437 		{
438 			{ &ifm_shared_option_descriptions[0], 0 },
439 			{ &ifm_subtype_ieee80211_option_descriptions[0], 0 },
440 			{ NULL, 0 },
441 		},
442 		{
443 			{ &ifm_subtype_ieee80211_mode_descriptions[0], 0 },
444 			{ &ifm_subtype_ieee80211_mode_aliases[0], 0 },
445 			{ NULL, 0 },
446 		},
447 	},
448 	{
449 		{
450 			{ &ifm_subtype_shared_descriptions[0], 0 },
451 			{ &ifm_subtype_shared_aliases[0], 1 },
452 			{ &ifm_subtype_atm_descriptions[0], 0 },
453 			{ &ifm_subtype_atm_aliases[0], 1 },
454 			{ NULL, 0 },
455 		},
456 		{
457 			{ &ifm_shared_option_descriptions[0], 0 },
458 			{ &ifm_subtype_atm_option_descriptions[0], 0 },
459 			{ NULL, 0 },
460 		},
461 		{
462 			{ NULL, 0 },
463 		},
464 	},
465 };
466 
467 static int
468 get_media_subtype(int type, const char *val)
469 {
470 	struct ifmedia_description *desc;
471 	struct ifmedia_type_to_subtype *ttos;
472 	int rval, i;
473 
474 	/* Find the top-level interface type. */
475 	for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
476 	    desc->ifmt_string != NULL; desc++, ttos++)
477 		if (type == desc->ifmt_word)
478 			break;
479 	if (desc->ifmt_string == NULL)
480 		errx(1, "unknown media type 0x%x", type);
481 
482 	for (i = 0; ttos->subtypes[i].desc != NULL; i++) {
483 		rval = lookup_media_word(ttos->subtypes[i].desc, val);
484 		if (rval != -1)
485 			return (rval);
486 	}
487 	errx(1, "unknown media subtype: %s", val);
488 	/*NOTREACHED*/
489 }
490 
491 static int
492 get_media_mode(int type, const char *val)
493 {
494 	struct ifmedia_description *desc;
495 	struct ifmedia_type_to_subtype *ttos;
496 	int rval, i;
497 
498 	/* Find the top-level interface type. */
499 	for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
500 	    desc->ifmt_string != NULL; desc++, ttos++)
501 		if (type == desc->ifmt_word)
502 			break;
503 	if (desc->ifmt_string == NULL)
504 		errx(1, "unknown media mode 0x%x", type);
505 
506 	for (i = 0; ttos->modes[i].desc != NULL; i++) {
507 		rval = lookup_media_word(ttos->modes[i].desc, val);
508 		if (rval != -1)
509 			return (rval);
510 	}
511 	return -1;
512 }
513 
514 static int
515 get_media_options(int type, const char *val)
516 {
517 	struct ifmedia_description *desc;
518 	struct ifmedia_type_to_subtype *ttos;
519 	char *optlist, *optptr;
520 	int option = 0, i, rval = 0;
521 
522 	/* We muck with the string, so copy it. */
523 	optlist = strdup(val);
524 	if (optlist == NULL)
525 		err(1, "strdup");
526 
527 	/* Find the top-level interface type. */
528 	for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
529 	    desc->ifmt_string != NULL; desc++, ttos++)
530 		if (type == desc->ifmt_word)
531 			break;
532 	if (desc->ifmt_string == NULL)
533 		errx(1, "unknown media type 0x%x", type);
534 
535 	/*
536 	 * Look up the options in the user-provided comma-separated
537 	 * list.
538 	 */
539 	optptr = optlist;
540 	for (; (optptr = strtok(optptr, ",")) != NULL; optptr = NULL) {
541 		for (i = 0; ttos->options[i].desc != NULL; i++) {
542 			option = lookup_media_word(ttos->options[i].desc, optptr);
543 			if (option != -1)
544 				break;
545 		}
546 		if (option == 0)
547 			errx(1, "unknown option: %s", optptr);
548 		rval |= option;
549 	}
550 
551 	free(optlist);
552 	return (rval);
553 }
554 
555 static int
556 lookup_media_word(struct ifmedia_description *desc, const char *val)
557 {
558 
559 	for (; desc->ifmt_string != NULL; desc++)
560 		if (strcasecmp(desc->ifmt_string, val) == 0)
561 			return (desc->ifmt_word);
562 
563 	return (-1);
564 }
565 
566 static struct ifmedia_description *get_toptype_desc(int ifmw)
567 {
568 	struct ifmedia_description *desc;
569 
570 	for (desc = ifm_type_descriptions; desc->ifmt_string != NULL; desc++)
571 		if (IFM_TYPE(ifmw) == desc->ifmt_word)
572 			break;
573 
574 	return desc;
575 }
576 
577 static struct ifmedia_type_to_subtype *get_toptype_ttos(int ifmw)
578 {
579 	struct ifmedia_description *desc;
580 	struct ifmedia_type_to_subtype *ttos;
581 
582 	for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
583 	    desc->ifmt_string != NULL; desc++, ttos++)
584 		if (IFM_TYPE(ifmw) == desc->ifmt_word)
585 			break;
586 
587 	return ttos;
588 }
589 
590 static struct ifmedia_description *get_subtype_desc(int ifmw,
591     struct ifmedia_type_to_subtype *ttos)
592 {
593 	int i;
594 	struct ifmedia_description *desc;
595 
596 	for (i = 0; ttos->subtypes[i].desc != NULL; i++) {
597 		if (ttos->subtypes[i].alias)
598 			continue;
599 		for (desc = ttos->subtypes[i].desc;
600 		    desc->ifmt_string != NULL; desc++) {
601 			if (IFM_SUBTYPE(ifmw) == desc->ifmt_word)
602 				return desc;
603 		}
604 	}
605 
606 	return NULL;
607 }
608 
609 static struct ifmedia_description *get_mode_desc(int ifmw,
610     struct ifmedia_type_to_subtype *ttos)
611 {
612 	int i;
613 	struct ifmedia_description *desc;
614 
615 	for (i = 0; ttos->modes[i].desc != NULL; i++) {
616 		if (ttos->modes[i].alias)
617 			continue;
618 		for (desc = ttos->modes[i].desc;
619 		    desc->ifmt_string != NULL; desc++) {
620 			if (IFM_MODE(ifmw) == desc->ifmt_word)
621 				return desc;
622 		}
623 	}
624 
625 	return NULL;
626 }
627 
628 static void
629 print_media_word(int ifmw, int print_toptype)
630 {
631 	struct ifmedia_description *desc;
632 	struct ifmedia_type_to_subtype *ttos;
633 	int seen_option = 0, i;
634 
635 	/* Find the top-level interface type. */
636 	desc = get_toptype_desc(ifmw);
637 	ttos = get_toptype_ttos(ifmw);
638 	if (desc->ifmt_string == NULL) {
639 		printf("<unknown type>");
640 		return;
641 	} else if (print_toptype) {
642 		printf("%s", desc->ifmt_string);
643 	}
644 
645 	/*
646 	 * Don't print the top-level type; it's not like we can
647 	 * change it, or anything.
648 	 */
649 
650 	/* Find subtype. */
651 	desc = get_subtype_desc(ifmw, ttos);
652 	if (desc != NULL)
653 		goto got_subtype;
654 
655 	/* Falling to here means unknown subtype. */
656 	printf("<unknown subtype>");
657 	return;
658 
659  got_subtype:
660 	if (print_toptype)
661 		putchar(' ');
662 
663 	printf("%s", desc->ifmt_string);
664 
665 	if (print_toptype) {
666 		desc = get_mode_desc(ifmw, ttos);
667 		if (desc != NULL && strcasecmp("autoselect", desc->ifmt_string))
668 			printf(" mode %s", desc->ifmt_string);
669 	}
670 
671 	/* Find options. */
672 	for (i = 0; ttos->options[i].desc != NULL; i++) {
673 		if (ttos->options[i].alias)
674 			continue;
675 		for (desc = ttos->options[i].desc;
676 		    desc->ifmt_string != NULL; desc++) {
677 			if (ifmw & desc->ifmt_word) {
678 				if (seen_option == 0)
679 					printf(" <");
680 				printf("%s%s", seen_option++ ? "," : "",
681 				    desc->ifmt_string);
682 			}
683 		}
684 	}
685 	printf("%s", seen_option ? ">" : "");
686 }
687 
688 static void
689 print_media_word_ifconfig(int ifmw)
690 {
691 	struct ifmedia_description *desc;
692 	struct ifmedia_type_to_subtype *ttos;
693 	int i;
694 
695 	/* Find the top-level interface type. */
696 	desc = get_toptype_desc(ifmw);
697 	ttos = get_toptype_ttos(ifmw);
698 	if (desc->ifmt_string == NULL) {
699 		printf("<unknown type>");
700 		return;
701 	}
702 
703 	/*
704 	 * Don't print the top-level type; it's not like we can
705 	 * change it, or anything.
706 	 */
707 
708 	/* Find subtype. */
709 	desc = get_subtype_desc(ifmw, ttos);
710 	if (desc != NULL)
711 		goto got_subtype;
712 
713 	/* Falling to here means unknown subtype. */
714 	printf("<unknown subtype>");
715 	return;
716 
717  got_subtype:
718 	printf("media %s", desc->ifmt_string);
719 
720 	desc = get_mode_desc(ifmw, ttos);
721 	if (desc != NULL)
722 		printf(" mode %s", desc->ifmt_string);
723 
724 	/* Find options. */
725 	for (i = 0; ttos->options[i].desc != NULL; i++) {
726 		if (ttos->options[i].alias)
727 			continue;
728 		for (desc = ttos->options[i].desc;
729 		    desc->ifmt_string != NULL; desc++) {
730 			if (ifmw & desc->ifmt_word) {
731 				printf(" mediaopt %s", desc->ifmt_string);
732 			}
733 		}
734 	}
735 }
736 
737 /**********************************************************************
738  * ...until here.
739  **********************************************************************/
740 
741 static struct cmd media_cmds[] = {
742 	DEF_CMD_ARG("media",	setmedia),
743 	DEF_CMD_ARG("mode",	setmediamode),
744 	DEF_CMD_ARG("mediaopt",	setmediaopt),
745 	DEF_CMD_ARG("-mediaopt",unsetmediaopt),
746 };
747 static struct afswtch af_media = {
748 	.af_name	= "af_media",
749 	.af_af		= AF_UNSPEC,
750 	.af_other_status = media_status,
751 };
752 
753 __constructor(123)
754 static void
755 ifmedia_ctor(void)
756 {
757 	size_t i;
758 
759 	for (i = 0; i < nitems(media_cmds);  i++)
760 		cmd_register(&media_cmds[i]);
761 
762 	af_register(&af_media);
763 }
764