1 /*-
2 * Copyright (c) 2001 Atsushi Onoe
3 * Copyright (c) 2002-2007 Sam Leffler, Errno Consulting
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29
30 /*
31 * IEEE 802.11 generic handler
32 */
33
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/kernel.h>
37
38 #include <sys/socket.h>
39
40 #include <net/if.h>
41 #include <net/if_media.h>
42 #include <net/ethernet.h>
43
44 #include <net80211/ieee80211_var.h>
45
46 #include <net/bpf.h>
47
48 const char *ieee80211_phymode_name[] = {
49 "auto", /* IEEE80211_MODE_AUTO */
50 "11a", /* IEEE80211_MODE_11A */
51 "11b", /* IEEE80211_MODE_11B */
52 "11g", /* IEEE80211_MODE_11G */
53 "FH", /* IEEE80211_MODE_FH */
54 "turboA", /* IEEE80211_MODE_TURBO_A */
55 "turboG", /* IEEE80211_MODE_TURBO_G */
56 "sturboA", /* IEEE80211_MODE_STURBO_A */
57 "11na", /* IEEE80211_MODE_11NA */
58 "11ng", /* IEEE80211_MODE_11NG */
59 };
60
61 /*
62 * Default supported rates for 802.11 operation (in IEEE .5Mb units).
63 */
64 #define B(r) ((r) | IEEE80211_RATE_BASIC)
65 static const struct ieee80211_rateset ieee80211_rateset_11a =
66 { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } };
67 static const struct ieee80211_rateset ieee80211_rateset_half =
68 { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } };
69 static const struct ieee80211_rateset ieee80211_rateset_quarter =
70 { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } };
71 static const struct ieee80211_rateset ieee80211_rateset_11b =
72 { 4, { B(2), B(4), B(11), B(22) } };
73 /* NB: OFDM rates are handled specially based on mode */
74 static const struct ieee80211_rateset ieee80211_rateset_11g =
75 { 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } };
76 #undef B
77
78 static int media_status(enum ieee80211_opmode ,
79 const struct ieee80211_channel *);
80
81 /* list of all instances */
82 SLIST_HEAD(ieee80211_list, ieee80211com);
83 static struct ieee80211_list ieee80211_list =
84 SLIST_HEAD_INITIALIZER(ieee80211_list);
85 static uint8_t ieee80211_vapmap[32]; /* enough for 256 */
86 static struct mtx ieee80211_vap_mtx;
87 MTX_SYSINIT(ieee80211, &ieee80211_vap_mtx, "net80211 instances", MTX_DEF);
88
89 static void
90 ieee80211_add_vap(struct ieee80211com *ic)
91 {
92 #define N(a) (sizeof(a)/sizeof(a[0]))
93 int i;
94 uint8_t b;
95
96 mtx_lock(&ieee80211_vap_mtx);
97 ic->ic_vap = 0;
98 for (i = 0; i < N(ieee80211_vapmap) && ieee80211_vapmap[i] == 0xff; i++)
99 ic->ic_vap += NBBY;
100 if (i == N(ieee80211_vapmap))
101 panic("vap table full");
102 for (b = ieee80211_vapmap[i]; b & 1; b >>= 1)
103 ic->ic_vap++;
104 setbit(ieee80211_vapmap, ic->ic_vap);
105 SLIST_INSERT_HEAD(&ieee80211_list, ic, ic_next);
106 mtx_unlock(&ieee80211_vap_mtx);
107 #undef N
108 }
109
110 static void
111 ieee80211_remove_vap(struct ieee80211com *ic)
112 {
113 mtx_lock(&ieee80211_vap_mtx);
114 SLIST_REMOVE(&ieee80211_list, ic, ieee80211com, ic_next);
115 KASSERT(ic->ic_vap < sizeof(ieee80211_vapmap)*NBBY,
116 ("invalid vap id %d", ic->ic_vap));
117 KASSERT(isset(ieee80211_vapmap, ic->ic_vap),
118 ("vap id %d not allocated", ic->ic_vap));
119 clrbit(ieee80211_vapmap, ic->ic_vap);
120 mtx_unlock(&ieee80211_vap_mtx);
121 }
122
123 /*
124 * Default reset method for use with the ioctl support. This
125 * method is invoked after any state change in the 802.11
126 * layer that should be propagated to the hardware but not
127 * require re-initialization of the 802.11 state machine (e.g
128 * rescanning for an ap). We always return ENETRESET which
129 * should cause the driver to re-initialize the device. Drivers
130 * can override this method to implement more optimized support.
131 */
132 static int
133 ieee80211_default_reset(struct ifnet *ifp)
134 {
135 return ENETRESET;
136 }
137
138 /*
139 * Fill in 802.11 available channel set, mark
140 * all available channels as active, and pick
141 * a default channel if not already specified.
142 */
143 static void
144 ieee80211_chan_init(struct ieee80211com *ic)
145 {
146 #define DEFAULTRATES(m, def) do { \
147 if (isset(ic->ic_modecaps, m) && ic->ic_sup_rates[m].rs_nrates == 0) \
148 ic->ic_sup_rates[m] = def; \
149 } while (0)
150 struct ieee80211_channel *c;
151 int i;
152
153 KASSERT(0 < ic->ic_nchans && ic->ic_nchans < IEEE80211_CHAN_MAX,
154 ("invalid number of channels specified: %u", ic->ic_nchans));
155 memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail));
156 setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO);
157 for (i = 0; i < ic->ic_nchans; i++) {
158 c = &ic->ic_channels[i];
159 KASSERT(c->ic_flags != 0, ("channel with no flags"));
160 KASSERT(c->ic_ieee < IEEE80211_CHAN_MAX,
161 ("channel with bogus ieee number %u", c->ic_ieee));
162 setbit(ic->ic_chan_avail, c->ic_ieee);
163 /*
164 * Identify mode capabilities.
165 */
166 if (IEEE80211_IS_CHAN_A(c))
167 setbit(ic->ic_modecaps, IEEE80211_MODE_11A);
168 if (IEEE80211_IS_CHAN_B(c))
169 setbit(ic->ic_modecaps, IEEE80211_MODE_11B);
170 if (IEEE80211_IS_CHAN_ANYG(c))
171 setbit(ic->ic_modecaps, IEEE80211_MODE_11G);
172 if (IEEE80211_IS_CHAN_FHSS(c))
173 setbit(ic->ic_modecaps, IEEE80211_MODE_FH);
174 if (IEEE80211_IS_CHAN_108A(c))
175 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A);
176 if (IEEE80211_IS_CHAN_108G(c))
177 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G);
178 if (IEEE80211_IS_CHAN_ST(c))
179 setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A);
180 if (IEEE80211_IS_CHAN_HTA(c))
181 setbit(ic->ic_modecaps, IEEE80211_MODE_11NA);
182 if (IEEE80211_IS_CHAN_HTG(c))
183 setbit(ic->ic_modecaps, IEEE80211_MODE_11NG);
184 }
185 /* initialize candidate channels to all available */
186 memcpy(ic->ic_chan_active, ic->ic_chan_avail,
187 sizeof(ic->ic_chan_avail));
188
189 ic->ic_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */
190 ic->ic_bsschan = IEEE80211_CHAN_ANYC;
191 ic->ic_prevchan = NULL;
192 /* arbitrarily pick the first channel */
193 ic->ic_curchan = &ic->ic_channels[0];
194
195 /* fillin well-known rate sets if driver has not specified */
196 DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b);
197 DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g);
198 DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a);
199 DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a);
200 DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g);
201
202 /*
203 * Set auto mode to reset active channel state and any desired channel.
204 */
205 (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO);
206 #undef DEFAULTRATES
207 }
208
209 void
210 ieee80211_ifattach(struct ieee80211com *ic)
211 {
212 struct ifnet *ifp = ic->ic_ifp;
213
214 ether_ifattach(ifp, ic->ic_myaddr);
215 ifp->if_output = ieee80211_output;
216
217 bpfattach2(ifp, DLT_IEEE802_11,
218 sizeof(struct ieee80211_frame_addr4), &ic->ic_rawbpf);
219
220 /* override the 802.3 setting */
221 ifp->if_hdrlen = ic->ic_headroom
222 + sizeof(struct ieee80211_qosframe_addr4)
223 + IEEE80211_WEP_IVLEN + IEEE80211_WEP_KIDLEN
224 + IEEE80211_WEP_EXTIVLEN;
225 /* XXX no way to recalculate on ifdetach */
226 if (ALIGN(ifp->if_hdrlen) > max_linkhdr) {
227 /* XXX sanity check... */
228 max_linkhdr = ALIGN(ifp->if_hdrlen);
229 max_hdr = max_linkhdr + max_protohdr;
230 max_datalen = MHLEN - max_hdr;
231 }
232
233 /*
234 * Fill in 802.11 available channel set, mark all
235 * available channels as active, and pick a default
236 * channel if not already specified.
237 */
238 ieee80211_chan_init(ic);
239
240 if (ic->ic_caps & IEEE80211_C_BGSCAN) /* enable if capable */
241 ic->ic_flags |= IEEE80211_F_BGSCAN;
242 #if 0
243 /* XXX not until WME+WPA issues resolved */
244 if (ic->ic_caps & IEEE80211_C_WME) /* enable if capable */
245 ic->ic_flags |= IEEE80211_F_WME;
246 #endif
247 if (ic->ic_caps & IEEE80211_C_BURST)
248 ic->ic_flags |= IEEE80211_F_BURST;
249 ic->ic_flags |= IEEE80211_F_DOTH; /* XXX out of caps, just ena */
250
251 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT;
252 ic->ic_bmissthreshold = IEEE80211_HWBMISS_DEFAULT;
253 ic->ic_dtim_period = IEEE80211_DTIM_DEFAULT;
254 IEEE80211_LOCK_INIT(ic, "ieee80211com");
255 IEEE80211_BEACON_LOCK_INIT(ic, "beacon");
256
257 ic->ic_lintval = ic->ic_bintval;
258 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX;
259
260 ieee80211_crypto_attach(ic);
261 ieee80211_node_attach(ic);
262 ieee80211_power_attach(ic);
263 ieee80211_proto_attach(ic);
264 ieee80211_ht_attach(ic);
265 ieee80211_scan_attach(ic);
266
267 ieee80211_add_vap(ic);
268
269 ieee80211_sysctl_attach(ic); /* NB: requires ic_vap */
270
271 /*
272 * Install a default reset method for the ioctl support.
273 * The driver is expected to fill this in before calling us.
274 */
275 if (ic->ic_reset == NULL)
276 ic->ic_reset = ieee80211_default_reset;
277
278 KASSERT(ifp->if_llsoftc == NULL, ("oops, hosed"));
279 ifp->if_llsoftc = ic;
280 }
281
282 void
283 ieee80211_ifdetach(struct ieee80211com *ic)
284 {
285 struct ifnet *ifp = ic->ic_ifp;
286
287 ieee80211_remove_vap(ic);
288
289 ieee80211_sysctl_detach(ic);
290 ieee80211_scan_detach(ic);
291 ieee80211_ht_detach(ic);
292 /* NB: must be called before ieee80211_node_detach */
293 ieee80211_proto_detach(ic);
294 ieee80211_crypto_detach(ic);
295 ieee80211_power_detach(ic);
296 ieee80211_node_detach(ic);
297 ifmedia_removeall(&ic->ic_media);
298
299 IEEE80211_LOCK_DESTROY(ic);
300 IEEE80211_BEACON_LOCK_DESTROY(ic);
301
302 bpfdetach(ifp);
303 ether_ifdetach(ifp);
304 }
305
306 static __inline int
307 mapgsm(u_int freq, u_int flags)
308 {
309 freq *= 10;
310 if (flags & IEEE80211_CHAN_QUARTER)
311 freq += 5;
312 else if (flags & IEEE80211_CHAN_HALF)
313 freq += 10;
314 else
315 freq += 20;
316 /* NB: there is no 907/20 wide but leave room */
317 return (freq - 906*10) / 5;
318 }
319
320 static __inline int
321 mappsb(u_int freq, u_int flags)
322 {
323 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5;
324 }
325
326 /*
327 * Convert MHz frequency to IEEE channel number.
328 */
329 int
330 ieee80211_mhz2ieee(u_int freq, u_int flags)
331 {
332 #define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990)
333 if (flags & IEEE80211_CHAN_GSM)
334 return mapgsm(freq, flags);
335 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
336 if (freq == 2484)
337 return 14;
338 if (freq < 2484)
339 return ((int) freq - 2407) / 5;
340 else
341 return 15 + ((freq - 2512) / 20);
342 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */
343 if (freq <= 5000) {
344 /* XXX check regdomain? */
345 if (IS_FREQ_IN_PSB(freq))
346 return mappsb(freq, flags);
347 return (freq - 4000) / 5;
348 } else
349 return (freq - 5000) / 5;
350 } else { /* either, guess */
351 if (freq == 2484)
352 return 14;
353 if (freq < 2484) {
354 if (907 <= freq && freq <= 922)
355 return mapgsm(freq, flags);
356 return ((int) freq - 2407) / 5;
357 }
358 if (freq < 5000) {
359 if (IS_FREQ_IN_PSB(freq))
360 return mappsb(freq, flags);
361 else if (freq > 4900)
362 return (freq - 4000) / 5;
363 else
364 return 15 + ((freq - 2512) / 20);
365 }
366 return (freq - 5000) / 5;
367 }
368 #undef IS_FREQ_IN_PSB
369 }
370
371 /*
372 * Convert channel to IEEE channel number.
373 */
374 int
375 ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c)
376 {
377 if (c == NULL) {
378 if_printf(ic->ic_ifp, "invalid channel (NULL)\n");
379 return 0; /* XXX */
380 }
381 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee);
382 }
383
384 /*
385 * Convert IEEE channel number to MHz frequency.
386 */
387 u_int
388 ieee80211_ieee2mhz(u_int chan, u_int flags)
389 {
390 if (flags & IEEE80211_CHAN_GSM)
391 return 907 + 5 * (chan / 10);
392 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
393 if (chan == 14)
394 return 2484;
395 if (chan < 14)
396 return 2407 + chan*5;
397 else
398 return 2512 + ((chan-15)*20);
399 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */
400 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) {
401 chan -= 37;
402 return 4940 + chan*5 + (chan % 5 ? 2 : 0);
403 }
404 return 5000 + (chan*5);
405 } else { /* either, guess */
406 /* XXX can't distinguish PSB+GSM channels */
407 if (chan == 14)
408 return 2484;
409 if (chan < 14) /* 0-13 */
410 return 2407 + chan*5;
411 if (chan < 27) /* 15-26 */
412 return 2512 + ((chan-15)*20);
413 return 5000 + (chan*5);
414 }
415 }
416
417 /*
418 * Locate a channel given a frequency+flags. We cache
419 * the previous lookup to optimize swithing between two
420 * channels--as happens with dynamic turbo.
421 */
422 struct ieee80211_channel *
423 ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags)
424 {
425 struct ieee80211_channel *c;
426 int i;
427
428 flags &= IEEE80211_CHAN_ALLTURBO;
429 c = ic->ic_prevchan;
430 if (c != NULL && c->ic_freq == freq &&
431 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
432 return c;
433 /* brute force search */
434 for (i = 0; i < ic->ic_nchans; i++) {
435 c = &ic->ic_channels[i];
436 if (c->ic_freq == freq &&
437 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
438 return c;
439 }
440 return NULL;
441 }
442
443 /*
444 * Locate a channel given a channel number+flags. We cache
445 * the previous lookup to optimize switching between two
446 * channels--as happens with dynamic turbo.
447 */
448 struct ieee80211_channel *
449 ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags)
450 {
451 struct ieee80211_channel *c;
452 int i;
453
454 flags &= IEEE80211_CHAN_ALLTURBO;
455 c = ic->ic_prevchan;
456 if (c != NULL && c->ic_ieee == ieee &&
457 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
458 return c;
459 /* brute force search */
460 for (i = 0; i < ic->ic_nchans; i++) {
461 c = &ic->ic_channels[i];
462 if (c->ic_ieee == ieee &&
463 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
464 return c;
465 }
466 return NULL;
467 }
468
469 static void
470 addmedia(struct ieee80211com *ic, int mode, int mword)
471 {
472 #define TURBO(m) ((m) | IFM_IEEE80211_TURBO)
473 #define ADD(_ic, _s, _o) \
474 ifmedia_add(&(_ic)->ic_media, \
475 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL)
476 static const u_int mopts[IEEE80211_MODE_MAX] = {
477 IFM_AUTO, /* IEEE80211_MODE_AUTO */
478 IFM_IEEE80211_11A, /* IEEE80211_MODE_11A */
479 IFM_IEEE80211_11B, /* IEEE80211_MODE_11B */
480 IFM_IEEE80211_11G, /* IEEE80211_MODE_11G */
481 IFM_IEEE80211_FH, /* IEEE80211_MODE_FH */
482 TURBO(IFM_IEEE80211_11A), /* IEEE80211_MODE_TURBO_A */
483 TURBO(IFM_IEEE80211_11G), /* IEEE80211_MODE_TURBO_G */
484 TURBO(IFM_IEEE80211_11A), /* IEEE80211_MODE_STURBO_A */
485 IFM_IEEE80211_11NA, /* IEEE80211_MODE_11NA */
486 IFM_IEEE80211_11NG, /* IEEE80211_MODE_11NG */
487 };
488 u_int mopt;
489
490 KASSERT(mode < IEEE80211_MODE_MAX, ("bad mode %u", mode));
491 mopt = mopts[mode];
492 KASSERT(mopt != 0 || mode == IEEE80211_MODE_AUTO,
493 ("no media mapping for mode %u", mode));
494
495 ADD(ic, mword, mopt); /* e.g. 11a auto */
496 if (ic->ic_caps & IEEE80211_C_IBSS)
497 ADD(ic, mword, mopt | IFM_IEEE80211_ADHOC);
498 if (ic->ic_caps & IEEE80211_C_HOSTAP)
499 ADD(ic, mword, mopt | IFM_IEEE80211_HOSTAP);
500 if (ic->ic_caps & IEEE80211_C_AHDEMO)
501 ADD(ic, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0);
502 if (ic->ic_caps & IEEE80211_C_MONITOR)
503 ADD(ic, mword, mopt | IFM_IEEE80211_MONITOR);
504 #undef ADD
505 #undef TURBO
506 }
507
508 /*
509 * Setup the media data structures according to the channel and
510 * rate tables. This must be called by the driver after
511 * ieee80211_attach and before most anything else.
512 */
513 void
514 ieee80211_media_init(struct ieee80211com *ic,
515 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
516 {
517 struct ifnet *ifp = ic->ic_ifp;
518 int i, j, mode, rate, maxrate, mword, r;
519 const struct ieee80211_rateset *rs;
520 struct ieee80211_rateset allrates;
521
522 /* NB: this works because the structure is initialized to zero */
523 if (LIST_EMPTY(&ic->ic_media.ifm_list)) {
524 /*
525 * Do late attach work that must wait for any subclass
526 * (i.e. driver) work such as overriding methods.
527 */
528 ieee80211_node_lateattach(ic);
529 } else {
530 /*
531 * We are re-initializing the channel list; clear
532 * the existing media state as the media routines
533 * don't suppress duplicates.
534 */
535 ifmedia_removeall(&ic->ic_media);
536 ieee80211_chan_init(ic);
537 }
538 ieee80211_power_lateattach(ic);
539
540 /*
541 * Fill in media characteristics.
542 */
543 ifmedia_init(&ic->ic_media, 0, media_change, media_stat);
544 maxrate = 0;
545 /*
546 * Add media for legacy operating modes.
547 */
548 memset(&allrates, 0, sizeof(allrates));
549 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) {
550 if (isclr(ic->ic_modecaps, mode))
551 continue;
552 addmedia(ic, mode, IFM_AUTO);
553 if (mode == IEEE80211_MODE_AUTO)
554 continue;
555 rs = &ic->ic_sup_rates[mode];
556 for (i = 0; i < rs->rs_nrates; i++) {
557 rate = rs->rs_rates[i];
558 mword = ieee80211_rate2media(ic, rate, mode);
559 if (mword == 0)
560 continue;
561 addmedia(ic, mode, mword);
562 /*
563 * Add legacy rate to the collection of all rates.
564 */
565 r = rate & IEEE80211_RATE_VAL;
566 for (j = 0; j < allrates.rs_nrates; j++)
567 if (allrates.rs_rates[j] == r)
568 break;
569 if (j == allrates.rs_nrates) {
570 /* unique, add to the set */
571 allrates.rs_rates[j] = r;
572 allrates.rs_nrates++;
573 }
574 rate = (rate & IEEE80211_RATE_VAL) / 2;
575 if (rate > maxrate)
576 maxrate = rate;
577 }
578 }
579 for (i = 0; i < allrates.rs_nrates; i++) {
580 mword = ieee80211_rate2media(ic, allrates.rs_rates[i],
581 IEEE80211_MODE_AUTO);
582 if (mword == 0)
583 continue;
584 /* NB: remove media options from mword */
585 addmedia(ic, IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword));
586 }
587 /*
588 * Add HT/11n media. Note that we do not have enough
589 * bits in the media subtype to express the MCS so we
590 * use a "placeholder" media subtype and any fixed MCS
591 * must be specified with a different mechanism.
592 */
593 for (; mode < IEEE80211_MODE_MAX; mode++) {
594 if (isclr(ic->ic_modecaps, mode))
595 continue;
596 addmedia(ic, mode, IFM_AUTO);
597 addmedia(ic, mode, IFM_IEEE80211_MCS);
598 }
599 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) ||
600 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) {
601 addmedia(ic, IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS);
602 /* XXX could walk htrates */
603 /* XXX known array size */
604 if (ieee80211_htrates[15] > maxrate)
605 maxrate = ieee80211_htrates[15];
606 }
607
608 /* NB: strip explicit mode; we're actually in autoselect */
609 ifmedia_set(&ic->ic_media,
610 media_status(ic->ic_opmode, ic->ic_curchan) &~ IFM_MMASK);
611
612 if (maxrate)
613 ifp->if_baudrate = IF_Mbps(maxrate);
614 }
615
616 const struct ieee80211_rateset *
617 ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c)
618 {
619 if (IEEE80211_IS_CHAN_HALF(c))
620 return &ieee80211_rateset_half;
621 if (IEEE80211_IS_CHAN_QUARTER(c))
622 return &ieee80211_rateset_quarter;
623 if (IEEE80211_IS_CHAN_HTA(c))
624 return &ic->ic_sup_rates[IEEE80211_MODE_11A];
625 if (IEEE80211_IS_CHAN_HTG(c)) {
626 /* XXX does this work for basic rates? */
627 return &ic->ic_sup_rates[IEEE80211_MODE_11G];
628 }
629 return &ic->ic_sup_rates[ieee80211_chan2mode(c)];
630 }
631
632 void
633 ieee80211_announce(struct ieee80211com *ic)
634 {
635 struct ifnet *ifp = ic->ic_ifp;
636 int i, mode, rate, mword;
637 const struct ieee80211_rateset *rs;
638
639 /* NB: skip AUTO since it has no rates */
640 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) {
641 if (isclr(ic->ic_modecaps, mode))
642 continue;
643 if_printf(ifp, "%s rates: ", ieee80211_phymode_name[mode]);
644 rs = &ic->ic_sup_rates[mode];
645 for (i = 0; i < rs->rs_nrates; i++) {
646 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode);
647 if (mword == 0)
648 continue;
649 rate = ieee80211_media2rate(mword);
650 printf("%s%d%sMbps", (i != 0 ? " " : ""),
651 rate / 2, ((rate & 0x1) != 0 ? ".5" : ""));
652 }
653 printf("\n");
654 }
655 ieee80211_ht_announce(ic);
656 }
657
658 void
659 ieee80211_announce_channels(struct ieee80211com *ic)
660 {
661 const struct ieee80211_channel *c;
662 char type;
663 int i, cw;
664
665 printf("Chan Freq CW RegPwr MinPwr MaxPwr\n");
666 for (i = 0; i < ic->ic_nchans; i++) {
667 c = &ic->ic_channels[i];
668 if (IEEE80211_IS_CHAN_ST(c))
669 type = 'S';
670 else if (IEEE80211_IS_CHAN_108A(c))
671 type = 'T';
672 else if (IEEE80211_IS_CHAN_108G(c))
673 type = 'G';
674 else if (IEEE80211_IS_CHAN_HT(c))
675 type = 'n';
676 else if (IEEE80211_IS_CHAN_A(c))
677 type = 'a';
678 else if (IEEE80211_IS_CHAN_ANYG(c))
679 type = 'g';
680 else if (IEEE80211_IS_CHAN_B(c))
681 type = 'b';
682 else
683 type = 'f';
684 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c))
685 cw = 40;
686 else if (IEEE80211_IS_CHAN_HALF(c))
687 cw = 10;
688 else if (IEEE80211_IS_CHAN_QUARTER(c))
689 cw = 5;
690 else
691 cw = 20;
692 printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n"
693 , c->ic_ieee, c->ic_freq, type
694 , cw
695 , IEEE80211_IS_CHAN_HT40U(c) ? '+' :
696 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' '
697 , c->ic_maxregpower
698 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0
699 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0
700 );
701 }
702 }
703
704 /*
705 * Find an instance by it's mac address.
706 */
707 struct ieee80211com *
708 ieee80211_find_vap(const uint8_t mac[IEEE80211_ADDR_LEN])
709 {
710 struct ieee80211com *ic;
711
712 /* XXX lock */
713 SLIST_FOREACH(ic, &ieee80211_list, ic_next)
714 if (IEEE80211_ADDR_EQ(mac, ic->ic_myaddr))
715 return ic;
716 return NULL;
717 }
718
719 static struct ieee80211com *
720 ieee80211_find_instance(struct ifnet *ifp)
721 {
722 struct ieee80211com *ic;
723
724 /* XXX lock */
725 /* XXX not right for multiple instances but works for now */
726 SLIST_FOREACH(ic, &ieee80211_list, ic_next)
727 if (ic->ic_ifp == ifp)
728 return ic;
729 return NULL;
730 }
731
732 static int
733 findrate(struct ieee80211com *ic, enum ieee80211_phymode mode, int rate)
734 {
735 #define IEEERATE(_ic,_m,_i) \
736 ((_ic)->ic_sup_rates[_m].rs_rates[_i] & IEEE80211_RATE_VAL)
737 int i, nrates = ic->ic_sup_rates[mode].rs_nrates;
738 for (i = 0; i < nrates; i++)
739 if (IEEERATE(ic, mode, i) == rate)
740 return i;
741 return -1;
742 #undef IEEERATE
743 }
744
745 /*
746 * Convert a media specification to a rate index and possibly a mode
747 * (if the rate is fixed and the mode is specified as ``auto'' then
748 * we need to lock down the mode so the index is meanginful).
749 */
750 static int
751 checkrate(struct ieee80211com *ic, enum ieee80211_phymode mode, int rate)
752 {
753
754 /*
755 * Check the rate table for the specified/current phy.
756 */
757 if (mode == IEEE80211_MODE_AUTO) {
758 int i;
759 /*
760 * In autoselect mode search for the rate.
761 */
762 for (i = IEEE80211_MODE_11A; i < IEEE80211_MODE_MAX; i++) {
763 if (isset(ic->ic_modecaps, i) &&
764 findrate(ic, i, rate) != -1)
765 return 1;
766 }
767 return 0;
768 } else {
769 /*
770 * Mode is fixed, check for rate.
771 */
772 return (findrate(ic, mode, rate) != -1);
773 }
774 }
775
776 /*
777 * Handle a media change request.
778 */
779 int
780 ieee80211_media_change(struct ifnet *ifp)
781 {
782 struct ieee80211com *ic;
783 struct ifmedia_entry *ime;
784 enum ieee80211_opmode newopmode;
785 enum ieee80211_phymode newphymode;
786 int newrate, error = 0;
787
788 ic = ieee80211_find_instance(ifp);
789 if (!ic) {
790 if_printf(ifp, "%s: no 802.11 instance!\n", __func__);
791 return EINVAL;
792 }
793 ime = ic->ic_media.ifm_cur;
794 /*
795 * First, identify the phy mode.
796 */
797 switch (IFM_MODE(ime->ifm_media)) {
798 case IFM_IEEE80211_11A:
799 newphymode = IEEE80211_MODE_11A;
800 break;
801 case IFM_IEEE80211_11B:
802 newphymode = IEEE80211_MODE_11B;
803 break;
804 case IFM_IEEE80211_11G:
805 newphymode = IEEE80211_MODE_11G;
806 break;
807 case IFM_IEEE80211_FH:
808 newphymode = IEEE80211_MODE_FH;
809 break;
810 case IFM_IEEE80211_11NA:
811 newphymode = IEEE80211_MODE_11NA;
812 break;
813 case IFM_IEEE80211_11NG:
814 newphymode = IEEE80211_MODE_11NG;
815 break;
816 case IFM_AUTO:
817 newphymode = IEEE80211_MODE_AUTO;
818 break;
819 default:
820 return EINVAL;
821 }
822 /*
823 * Turbo mode is an ``option''.
824 * XXX does not apply to AUTO
825 */
826 if (ime->ifm_media & IFM_IEEE80211_TURBO) {
827 if (newphymode == IEEE80211_MODE_11A) {
828 if (ic->ic_flags & IEEE80211_F_TURBOP)
829 newphymode = IEEE80211_MODE_TURBO_A;
830 else
831 newphymode = IEEE80211_MODE_STURBO_A;
832 } else if (newphymode == IEEE80211_MODE_11G)
833 newphymode = IEEE80211_MODE_TURBO_G;
834 else
835 return EINVAL;
836 }
837 /* XXX HT40 +/- */
838 /*
839 * Next, the fixed/variable rate.
840 */
841 newrate = ic->ic_fixed_rate;
842 if (IFM_SUBTYPE(ime->ifm_media) != IFM_AUTO) {
843 /*
844 * Convert media subtype to rate.
845 */
846 newrate = ieee80211_media2rate(ime->ifm_media);
847 if (newrate == 0 || !checkrate(ic, newphymode, newrate))
848 return EINVAL;
849 } else
850 newrate = IEEE80211_FIXED_RATE_NONE;
851
852 /*
853 * Deduce new operating mode but don't install it just yet.
854 */
855 if ((ime->ifm_media & (IFM_IEEE80211_ADHOC|IFM_FLAG0)) ==
856 (IFM_IEEE80211_ADHOC|IFM_FLAG0))
857 newopmode = IEEE80211_M_AHDEMO;
858 else if (ime->ifm_media & IFM_IEEE80211_HOSTAP)
859 newopmode = IEEE80211_M_HOSTAP;
860 else if (ime->ifm_media & IFM_IEEE80211_ADHOC)
861 newopmode = IEEE80211_M_IBSS;
862 else if (ime->ifm_media & IFM_IEEE80211_MONITOR)
863 newopmode = IEEE80211_M_MONITOR;
864 else
865 newopmode = IEEE80211_M_STA;
866
867 /*
868 * Handle phy mode change.
869 */
870 if (ic->ic_des_mode != newphymode) { /* change phy mode */
871 ic->ic_des_mode = newphymode;
872 error = ENETRESET;
873 }
874
875 /*
876 * Committed to changes, install the rate setting.
877 */
878 if (ic->ic_fixed_rate != newrate) {
879 ic->ic_fixed_rate = newrate; /* set fixed tx rate */
880 error = ENETRESET;
881 }
882
883 /*
884 * Handle operating mode change.
885 */
886 if (ic->ic_opmode != newopmode) {
887 ic->ic_opmode = newopmode;
888 switch (newopmode) {
889 case IEEE80211_M_AHDEMO:
890 case IEEE80211_M_HOSTAP:
891 case IEEE80211_M_STA:
892 case IEEE80211_M_MONITOR:
893 case IEEE80211_M_WDS:
894 ic->ic_flags &= ~IEEE80211_F_IBSSON;
895 break;
896 case IEEE80211_M_IBSS:
897 ic->ic_flags |= IEEE80211_F_IBSSON;
898 break;
899 }
900 /*
901 * Yech, slot time may change depending on the
902 * operating mode so reset it to be sure everything
903 * is setup appropriately.
904 */
905 ieee80211_reset_erp(ic);
906 ieee80211_wme_initparams(ic); /* after opmode change */
907 error = ENETRESET;
908 }
909 #ifdef notdef
910 if (error == 0)
911 ifp->if_baudrate = ifmedia_baudrate(ime->ifm_media);
912 #endif
913 return error;
914 }
915
916 /*
917 * Common code to calculate the media status word
918 * from the operating mode and channel state.
919 */
920 static int
921 media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan)
922 {
923 int status;
924
925 status = IFM_IEEE80211;
926 switch (opmode) {
927 case IEEE80211_M_STA:
928 break;
929 case IEEE80211_M_IBSS:
930 status |= IFM_IEEE80211_ADHOC;
931 break;
932 case IEEE80211_M_HOSTAP:
933 status |= IFM_IEEE80211_HOSTAP;
934 break;
935 case IEEE80211_M_MONITOR:
936 status |= IFM_IEEE80211_MONITOR;
937 break;
938 case IEEE80211_M_AHDEMO:
939 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0;
940 break;
941 case IEEE80211_M_WDS:
942 /* should not come here */
943 break;
944 }
945 if (IEEE80211_IS_CHAN_HTA(chan)) {
946 status |= IFM_IEEE80211_11NA;
947 } else if (IEEE80211_IS_CHAN_HTG(chan)) {
948 status |= IFM_IEEE80211_11NG;
949 } else if (IEEE80211_IS_CHAN_A(chan)) {
950 status |= IFM_IEEE80211_11A;
951 } else if (IEEE80211_IS_CHAN_B(chan)) {
952 status |= IFM_IEEE80211_11B;
953 } else if (IEEE80211_IS_CHAN_ANYG(chan)) {
954 status |= IFM_IEEE80211_11G;
955 } else if (IEEE80211_IS_CHAN_FHSS(chan)) {
956 status |= IFM_IEEE80211_FH;
957 }
958 /* XXX else complain? */
959
960 if (IEEE80211_IS_CHAN_TURBO(chan))
961 status |= IFM_IEEE80211_TURBO;
962
963 return status;
964 }
965
966 void
967 ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr)
968 {
969 struct ieee80211com *ic;
970 enum ieee80211_phymode mode;
971 const struct ieee80211_rateset *rs;
972
973 ic = ieee80211_find_instance(ifp);
974 if (!ic) {
975 if_printf(ifp, "%s: no 802.11 instance!\n", __func__);
976 return;
977 }
978 imr->ifm_status = IFM_AVALID;
979 /*
980 * NB: use the current channel's mode to lock down a xmit
981 * rate only when running; otherwise we may have a mismatch
982 * in which case the rate will not be convertible.
983 */
984 if (ic->ic_state == IEEE80211_S_RUN) {
985 imr->ifm_status |= IFM_ACTIVE;
986 mode = ieee80211_chan2mode(ic->ic_curchan);
987 } else
988 mode = IEEE80211_MODE_AUTO;
989 imr->ifm_active = media_status(ic->ic_opmode, ic->ic_curchan);
990 /*
991 * Calculate a current rate if possible.
992 */
993 if (ic->ic_fixed_rate != IEEE80211_FIXED_RATE_NONE) {
994 /*
995 * A fixed rate is set, report that.
996 */
997 imr->ifm_active |= ieee80211_rate2media(ic,
998 ic->ic_fixed_rate, mode);
999 } else if (ic->ic_opmode == IEEE80211_M_STA) {
1000 /*
1001 * In station mode report the current transmit rate.
1002 * XXX HT rate
1003 */
1004 rs = &ic->ic_bss->ni_rates;
1005 imr->ifm_active |= ieee80211_rate2media(ic,
1006 rs->rs_rates[ic->ic_bss->ni_txrate], mode);
1007 } else
1008 imr->ifm_active |= IFM_AUTO;
1009 }
1010
1011 /*
1012 * Set the current phy mode and recalculate the active channel
1013 * set based on the available channels for this mode. Also
1014 * select a new default/current channel if the current one is
1015 * inappropriate for this mode.
1016 */
1017 int
1018 ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode)
1019 {
1020 /*
1021 * Adjust basic rates in 11b/11g supported rate set.
1022 * Note that if operating on a hal/quarter rate channel
1023 * this is a noop as those rates sets are different
1024 * and used instead.
1025 */
1026 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B)
1027 ieee80211_set11gbasicrates(&ic->ic_sup_rates[mode], mode);
1028
1029 ic->ic_curmode = mode;
1030 ieee80211_reset_erp(ic); /* reset ERP state */
1031 ieee80211_wme_initparams(ic); /* reset WME stat */
1032
1033 return 0;
1034 }
1035
1036 /*
1037 * Return the phy mode for with the specified channel.
1038 */
1039 enum ieee80211_phymode
1040 ieee80211_chan2mode(const struct ieee80211_channel *chan)
1041 {
1042
1043 if (IEEE80211_IS_CHAN_HTA(chan))
1044 return IEEE80211_MODE_11NA;
1045 else if (IEEE80211_IS_CHAN_HTG(chan))
1046 return IEEE80211_MODE_11NG;
1047 else if (IEEE80211_IS_CHAN_108G(chan))
1048 return IEEE80211_MODE_TURBO_G;
1049 else if (IEEE80211_IS_CHAN_ST(chan))
1050 return IEEE80211_MODE_STURBO_A;
1051 else if (IEEE80211_IS_CHAN_TURBO(chan))
1052 return IEEE80211_MODE_TURBO_A;
1053 else if (IEEE80211_IS_CHAN_A(chan))
1054 return IEEE80211_MODE_11A;
1055 else if (IEEE80211_IS_CHAN_ANYG(chan))
1056 return IEEE80211_MODE_11G;
1057 else if (IEEE80211_IS_CHAN_B(chan))
1058 return IEEE80211_MODE_11B;
1059 else if (IEEE80211_IS_CHAN_FHSS(chan))
1060 return IEEE80211_MODE_FH;
1061
1062 /* NB: should not get here */
1063 printf("%s: cannot map channel to mode; freq %u flags 0x%x\n",
1064 __func__, chan->ic_freq, chan->ic_flags);
1065 return IEEE80211_MODE_11B;
1066 }
1067
1068 struct ratemedia {
1069 u_int match; /* rate + mode */
1070 u_int media; /* if_media rate */
1071 };
1072
1073 static int
1074 findmedia(const struct ratemedia rates[], int n, u_int match)
1075 {
1076 int i;
1077
1078 for (i = 0; i < n; i++)
1079 if (rates[i].match == match)
1080 return rates[i].media;
1081 return IFM_AUTO;
1082 }
1083
1084 /*
1085 * Convert IEEE80211 rate value to ifmedia subtype.
1086 * Rate is either a legacy rate in units of 0.5Mbps
1087 * or an MCS index.
1088 */
1089 int
1090 ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode)
1091 {
1092 #define N(a) (sizeof(a) / sizeof(a[0]))
1093 static const struct ratemedia rates[] = {
1094 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 },
1095 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 },
1096 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 },
1097 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 },
1098 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 },
1099 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 },
1100 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 },
1101 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 },
1102 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 },
1103 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 },
1104 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 },
1105 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 },
1106 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 },
1107 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 },
1108 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 },
1109 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 },
1110 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 },
1111 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 },
1112 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 },
1113 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 },
1114 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 },
1115 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 },
1116 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 },
1117 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 },
1118 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 },
1119 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 },
1120 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 },
1121 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 },
1122 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 },
1123 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 },
1124 /* NB: OFDM72 doesn't realy exist so we don't handle it */
1125 };
1126 static const struct ratemedia htrates[] = {
1127 { 0, IFM_IEEE80211_MCS },
1128 { 1, IFM_IEEE80211_MCS },
1129 { 2, IFM_IEEE80211_MCS },
1130 { 3, IFM_IEEE80211_MCS },
1131 { 4, IFM_IEEE80211_MCS },
1132 { 5, IFM_IEEE80211_MCS },
1133 { 6, IFM_IEEE80211_MCS },
1134 { 7, IFM_IEEE80211_MCS },
1135 { 8, IFM_IEEE80211_MCS },
1136 { 9, IFM_IEEE80211_MCS },
1137 { 10, IFM_IEEE80211_MCS },
1138 { 11, IFM_IEEE80211_MCS },
1139 { 12, IFM_IEEE80211_MCS },
1140 { 13, IFM_IEEE80211_MCS },
1141 { 14, IFM_IEEE80211_MCS },
1142 { 15, IFM_IEEE80211_MCS },
1143 };
1144 int m;
1145
1146 /*
1147 * Check 11n rates first for match as an MCS.
1148 */
1149 if (mode == IEEE80211_MODE_11NA) {
1150 if (rate & IEEE80211_RATE_MCS) {
1151 rate &= ~IEEE80211_RATE_MCS;
1152 m = findmedia(htrates, N(htrates), rate);
1153 if (m != IFM_AUTO)
1154 return m | IFM_IEEE80211_11NA;
1155 }
1156 } else if (mode == IEEE80211_MODE_11NG) {
1157 /* NB: 12 is ambiguous, it will be treated as an MCS */
1158 if (rate & IEEE80211_RATE_MCS) {
1159 rate &= ~IEEE80211_RATE_MCS;
1160 m = findmedia(htrates, N(htrates), rate);
1161 if (m != IFM_AUTO)
1162 return m | IFM_IEEE80211_11NG;
1163 }
1164 }
1165 rate &= IEEE80211_RATE_VAL;
1166 switch (mode) {
1167 case IEEE80211_MODE_11A:
1168 case IEEE80211_MODE_11NA:
1169 case IEEE80211_MODE_TURBO_A:
1170 case IEEE80211_MODE_STURBO_A:
1171 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11A);
1172 case IEEE80211_MODE_11B:
1173 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11B);
1174 case IEEE80211_MODE_FH:
1175 return findmedia(rates, N(rates), rate | IFM_IEEE80211_FH);
1176 case IEEE80211_MODE_AUTO:
1177 /* NB: ic may be NULL for some drivers */
1178 if (ic && ic->ic_phytype == IEEE80211_T_FH)
1179 return findmedia(rates, N(rates),
1180 rate | IFM_IEEE80211_FH);
1181 /* NB: hack, 11g matches both 11b+11a rates */
1182 /* fall thru... */
1183 case IEEE80211_MODE_11G:
1184 case IEEE80211_MODE_11NG:
1185 case IEEE80211_MODE_TURBO_G:
1186 return findmedia(rates, N(rates), rate | IFM_IEEE80211_11G);
1187 }
1188 return IFM_AUTO;
1189 #undef N
1190 }
1191
1192 int
1193 ieee80211_media2rate(int mword)
1194 {
1195 #define N(a) (sizeof(a) / sizeof(a[0]))
1196 static const int ieeerates[] = {
1197 -1, /* IFM_AUTO */
1198 0, /* IFM_MANUAL */
1199 0, /* IFM_NONE */
1200 2, /* IFM_IEEE80211_FH1 */
1201 4, /* IFM_IEEE80211_FH2 */
1202 2, /* IFM_IEEE80211_DS1 */
1203 4, /* IFM_IEEE80211_DS2 */
1204 11, /* IFM_IEEE80211_DS5 */
1205 22, /* IFM_IEEE80211_DS11 */
1206 44, /* IFM_IEEE80211_DS22 */
1207 12, /* IFM_IEEE80211_OFDM6 */
1208 18, /* IFM_IEEE80211_OFDM9 */
1209 24, /* IFM_IEEE80211_OFDM12 */
1210 36, /* IFM_IEEE80211_OFDM18 */
1211 48, /* IFM_IEEE80211_OFDM24 */
1212 72, /* IFM_IEEE80211_OFDM36 */
1213 96, /* IFM_IEEE80211_OFDM48 */
1214 108, /* IFM_IEEE80211_OFDM54 */
1215 144, /* IFM_IEEE80211_OFDM72 */
1216 0, /* IFM_IEEE80211_DS354k */
1217 0, /* IFM_IEEE80211_DS512k */
1218 6, /* IFM_IEEE80211_OFDM3 */
1219 9, /* IFM_IEEE80211_OFDM4 */
1220 54, /* IFM_IEEE80211_OFDM27 */
1221 -1, /* IFM_IEEE80211_MCS */
1222 };
1223 return IFM_SUBTYPE(mword) < N(ieeerates) ?
1224 ieeerates[IFM_SUBTYPE(mword)] : 0;
1225 #undef N
1226 }
Cache object: f0192570ab5fa140ac0fbdf3c263782a
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