1 /* $NetBSD: if_media.c,v 1.1 1997/03/17 02:55:15 thorpej Exp $ */
2 /* $FreeBSD: src/sys/net/if_media.c,v 1.9.2.4 2001/07/04 00:12:38 brooks Exp $ */
3 /* $DragonFly: src/sys/net/if_media.c,v 1.8 2005/11/28 17:13:45 dillon Exp $ */
7 * Jonathan Stone and Jason R. Thorpe. All rights reserved.
9 * This software is derived from information provided by Matt Thomas.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by Jonathan Stone
22 * and Jason R. Thorpe for the NetBSD Project.
23 * 4. The names of the authors may not be used to endorse or promote products
24 * derived from this software without specific prior written permission.
26 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
27 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
28 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
29 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
30 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
31 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
32 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
33 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
34 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
40 * BSD/OS-compatible network interface media selection.
42 * Where it is safe to do so, this code strays slightly from the BSD/OS
43 * design. Software which uses the API (device drivers, basically)
44 * shouldn't notice any difference.
46 * Many thanks to Matt Thomas for providing the information necessary
47 * to implement this interface.
50 #include <sys/param.h>
51 #include <sys/systm.h>
52 #include <sys/socket.h>
53 #include <sys/sockio.h>
54 #include <sys/malloc.h>
57 #include <net/if_media.h>
60 * Compile-time options:
62 * turn on implementation-level debug printfs.
63 * Useful for debugging newly-ported drivers.
66 static struct ifmedia_entry *ifmedia_match (struct ifmedia *ifm,
70 int ifmedia_debug = 0;
71 static void ifmedia_printword (int);
75 * Initialize if_media struct for a specific interface instance.
78 ifmedia_init(ifm, dontcare_mask, change_callback, status_callback)
81 ifm_change_cb_t change_callback;
82 ifm_stat_cb_t status_callback;
85 LIST_INIT(&ifm->ifm_list);
88 ifm->ifm_mask = dontcare_mask; /* IF don't-care bits */
89 ifm->ifm_change = change_callback;
90 ifm->ifm_status = status_callback;
94 ifmedia_removeall(ifm)
97 struct ifmedia_entry *entry;
99 for (entry = LIST_FIRST(&ifm->ifm_list); entry;
100 entry = LIST_FIRST(&ifm->ifm_list)) {
101 LIST_REMOVE(entry, ifm_list);
102 free(entry, M_IFADDR);
107 * Add a media configuration to the list of supported media
108 * for a specific interface instance.
111 ifmedia_add(ifm, mword, data, aux)
117 struct ifmedia_entry *entry;
122 printf("ifmedia_add: null ifm\n");
125 printf("Adding entry for ");
126 ifmedia_printword(mword);
130 entry = malloc(sizeof(*entry), M_IFADDR, M_INTWAIT);
131 entry->ifm_media = mword;
132 entry->ifm_data = data;
133 entry->ifm_aux = aux;
135 LIST_INSERT_HEAD(&ifm->ifm_list, entry, ifm_list);
139 * Add an array of media configurations to the list of
140 * supported media for a specific interface instance.
143 ifmedia_list_add(ifm, lp, count)
145 struct ifmedia_entry *lp;
150 for (i = 0; i < count; i++)
151 ifmedia_add(ifm, lp[i].ifm_media, lp[i].ifm_data,
156 * Set the default active media.
158 * Called by device-specific code which is assumed to have already
159 * selected the default media in hardware. We do _not_ call the
160 * media-change callback.
163 ifmedia_set(ifm, target)
168 struct ifmedia_entry *match;
170 match = ifmedia_match(ifm, target, ifm->ifm_mask);
173 printf("ifmedia_set: no match for 0x%x/0x%x\n",
174 target, ~ifm->ifm_mask);
175 panic("ifmedia_set");
177 ifm->ifm_cur = match;
181 printf("ifmedia_set: target ");
182 ifmedia_printword(target);
183 printf("ifmedia_set: setting to ");
184 ifmedia_printword(ifm->ifm_cur->ifm_media);
190 * Device-independent media ioctl support function, typically called
191 * from the device network ioctl procedure.
194 ifmedia_ioctl(ifp, ifr, ifm, cmd)
200 struct ifmedia_entry *match;
201 struct ifmediareq *ifmr = (struct ifmediareq *) ifr;
202 int error = 0, sticky;
204 if (ifp == NULL || ifr == NULL || ifm == NULL)
207 ASSERT_SERIALIZED(ifp->if_serializer);
211 * Set the current media.
215 struct ifmedia_entry *oldentry;
217 int newmedia = ifr->ifr_media;
219 match = ifmedia_match(ifm, newmedia, ifm->ifm_mask);
224 "ifmedia_ioctl: no media found for 0x%x\n",
232 * If no change, we're done.
233 * XXX Automedia may invole software intervention.
234 * Keep going in case the the connected media changed.
235 * Similarly, if best match changed (kernel debugger?).
237 if ((IFM_SUBTYPE(newmedia) != IFM_AUTO) &&
238 (newmedia == ifm->ifm_media) &&
239 (match == ifm->ifm_cur))
243 * We found a match, now make the driver switch to it.
244 * Make sure to preserve our old media type in case the
245 * driver can't switch.
249 printf("ifmedia_ioctl: switching %s to ",
251 ifmedia_printword(match->ifm_media);
254 oldentry = ifm->ifm_cur;
255 oldmedia = ifm->ifm_media;
256 ifm->ifm_cur = match;
257 ifm->ifm_media = newmedia;
258 error = (*ifm->ifm_change)(ifp);
260 ifm->ifm_cur = oldentry;
261 ifm->ifm_media = oldmedia;
267 * Get list of available media and current media on interface.
271 struct ifmedia_entry *ep;
273 int usermax; /* user requested max */
275 kptr = NULL; /* XXX gcc */
277 ifmr->ifm_active = ifmr->ifm_current = ifm->ifm_cur ?
278 ifm->ifm_cur->ifm_media : IFM_NONE;
279 ifmr->ifm_mask = ifm->ifm_mask;
280 ifmr->ifm_status = 0;
281 (*ifm->ifm_status)(ifp, ifmr);
287 * If there are more interfaces on the list, count
288 * them. This allows the caller to set ifmr->ifm_count
289 * to 0 on the first call to know how much space to
292 LIST_FOREACH(ep, &ifm->ifm_list, ifm_list)
296 * Don't allow the user to ask for too many
297 * or a negative number.
299 if (ifmr->ifm_count > usermax)
300 ifmr->ifm_count = usermax;
301 else if (ifmr->ifm_count < 0)
304 if (ifmr->ifm_count != 0) {
305 kptr = (int *)malloc(ifmr->ifm_count * sizeof(int),
309 * Get the media words from the interface's list.
311 ep = LIST_FIRST(&ifm->ifm_list);
312 for (; ep != NULL && count < ifmr->ifm_count;
313 ep = LIST_NEXT(ep, ifm_list), count++)
314 kptr[count] = ep->ifm_media;
317 error = E2BIG; /* oops! */
323 * We do the copyout on E2BIG, because that's
324 * just our way of telling userland that there
325 * are more. This is the behavior I've observed
329 if ((error == 0 || error == E2BIG) && ifmr->ifm_count != 0) {
330 error = copyout((caddr_t)kptr,
331 (caddr_t)ifmr->ifm_ulist,
332 ifmr->ifm_count * sizeof(int));
338 if (ifmr->ifm_count != 0)
341 ifmr->ifm_count = count;
353 * Find media entry matching a given ifm word.
356 static struct ifmedia_entry *
357 ifmedia_match(ifm, target, mask)
362 struct ifmedia_entry *match, *next;
367 LIST_FOREACH(next, &ifm->ifm_list, ifm_list) {
368 if ((next->ifm_media & mask) == (target & mask)) {
369 #if defined(IFMEDIA_DEBUG) || defined(DIAGNOSTIC)
371 printf("ifmedia_match: multiple match for "
372 "0x%x/0x%x\n", target, mask);
383 struct ifmedia_description ifm_type_descriptions[] =
384 IFM_TYPE_DESCRIPTIONS;
386 struct ifmedia_description ifm_subtype_ethernet_descriptions[] =
387 IFM_SUBTYPE_ETHERNET_DESCRIPTIONS;
389 struct ifmedia_description ifm_subtype_ethernet_option_descriptions[] =
390 IFM_SUBTYPE_ETHERNET_OPTION_DESCRIPTIONS;
392 struct ifmedia_description ifm_subtype_tokenring_descriptions[] =
393 IFM_SUBTYPE_TOKENRING_DESCRIPTIONS;
395 struct ifmedia_description ifm_subtype_tokenring_option_descriptions[] =
396 IFM_SUBTYPE_TOKENRING_OPTION_DESCRIPTIONS;
398 struct ifmedia_description ifm_subtype_fddi_descriptions[] =
399 IFM_SUBTYPE_FDDI_DESCRIPTIONS;
401 struct ifmedia_description ifm_subtype_fddi_option_descriptions[] =
402 IFM_SUBTYPE_FDDI_OPTION_DESCRIPTIONS;
404 struct ifmedia_description ifm_subtype_ieee80211_descriptions[] =
405 IFM_SUBTYPE_IEEE80211_DESCRIPTIONS;
407 struct ifmedia_description ifm_subtype_ieee80211_option_descriptions[] =
408 IFM_SUBTYPE_IEEE80211_OPTION_DESCRIPTIONS;
410 struct ifmedia_description ifm_subtype_shared_descriptions[] =
411 IFM_SUBTYPE_SHARED_DESCRIPTIONS;
413 struct ifmedia_description ifm_shared_option_descriptions[] =
414 IFM_SHARED_OPTION_DESCRIPTIONS;
416 struct ifmedia_type_to_subtype {
417 struct ifmedia_description *subtypes;
418 struct ifmedia_description *options;
421 /* must be in the same order as IFM_TYPE_DESCRIPTIONS */
422 struct ifmedia_type_to_subtype ifmedia_types_to_subtypes[] = {
424 &ifm_subtype_ethernet_descriptions[0],
425 &ifm_subtype_ethernet_option_descriptions[0]
428 &ifm_subtype_tokenring_descriptions[0],
429 &ifm_subtype_tokenring_option_descriptions[0]
432 &ifm_subtype_fddi_descriptions[0],
433 &ifm_subtype_fddi_option_descriptions[0]
436 &ifm_subtype_ieee80211_descriptions[0],
437 &ifm_subtype_ieee80211_option_descriptions[0]
442 * print a media word.
445 ifmedia_printword(ifmw)
448 struct ifmedia_description *desc;
449 struct ifmedia_type_to_subtype *ttos;
452 /* Find the top-level interface type. */
453 for (desc = ifm_type_descriptions, ttos = ifmedia_types_to_subtypes;
454 desc->ifmt_string != NULL; desc++, ttos++)
455 if (IFM_TYPE(ifmw) == desc->ifmt_word)
457 if (desc->ifmt_string == NULL) {
458 printf("<unknown type>\n");
461 printf(desc->ifmt_string);
464 * Check for the shared subtype descriptions first, then the
465 * type-specific ones.
467 for (desc = ifm_subtype_shared_descriptions;
468 desc->ifmt_string != NULL; desc++)
469 if (IFM_SUBTYPE(ifmw) == desc->ifmt_word)
472 for (desc = ttos->subtypes; desc->ifmt_string != NULL; desc++)
473 if (IFM_SUBTYPE(ifmw) == desc->ifmt_word)
475 if (desc->ifmt_string == NULL) {
476 printf(" <unknown subtype>\n");
481 printf(" %s", desc->ifmt_string);
484 * Look for shared options.
486 for (desc = ifm_shared_option_descriptions;
487 desc->ifmt_string != NULL; desc++) {
488 if (ifmw & desc->ifmt_word) {
489 if (seen_option == 0)
491 printf("%s%s", seen_option++ ? "," : "",
497 * Look for subtype-specific options.
499 for (desc = ttos->options; desc->ifmt_string != NULL; desc++) {
500 if (ifmw & desc->ifmt_word) {
501 if (seen_option == 0)
503 printf("%s%s", seen_option++ ? "," : "",
507 printf("%s\n", seen_option ? ">" : "");
509 #endif /* IFMEDIA_DEBUG */