1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2001 Atsushi Onoe
5 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
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 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD: releng/12.0/sys/net80211/ieee80211.c 336184 2018-07-10 23:30:19Z kevans $");
31
32 /*
33 * IEEE 802.11 generic handler
34 */
35 #include "opt_wlan.h"
36
37 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/kernel.h>
40 #include <sys/malloc.h>
41 #include <sys/socket.h>
42 #include <sys/sbuf.h>
43
44 #include <machine/stdarg.h>
45
46 #include <net/if.h>
47 #include <net/if_var.h>
48 #include <net/if_dl.h>
49 #include <net/if_media.h>
50 #include <net/if_types.h>
51 #include <net/ethernet.h>
52
53 #include <net80211/ieee80211_var.h>
54 #include <net80211/ieee80211_regdomain.h>
55 #ifdef IEEE80211_SUPPORT_SUPERG
56 #include <net80211/ieee80211_superg.h>
57 #endif
58 #include <net80211/ieee80211_ratectl.h>
59 #include <net80211/ieee80211_vht.h>
60
61 #include <net/bpf.h>
62
63 const char *ieee80211_phymode_name[IEEE80211_MODE_MAX] = {
64 [IEEE80211_MODE_AUTO] = "auto",
65 [IEEE80211_MODE_11A] = "11a",
66 [IEEE80211_MODE_11B] = "11b",
67 [IEEE80211_MODE_11G] = "11g",
68 [IEEE80211_MODE_FH] = "FH",
69 [IEEE80211_MODE_TURBO_A] = "turboA",
70 [IEEE80211_MODE_TURBO_G] = "turboG",
71 [IEEE80211_MODE_STURBO_A] = "sturboA",
72 [IEEE80211_MODE_HALF] = "half",
73 [IEEE80211_MODE_QUARTER] = "quarter",
74 [IEEE80211_MODE_11NA] = "11na",
75 [IEEE80211_MODE_11NG] = "11ng",
76 [IEEE80211_MODE_VHT_2GHZ] = "11acg",
77 [IEEE80211_MODE_VHT_5GHZ] = "11ac",
78 };
79 /* map ieee80211_opmode to the corresponding capability bit */
80 const int ieee80211_opcap[IEEE80211_OPMODE_MAX] = {
81 [IEEE80211_M_IBSS] = IEEE80211_C_IBSS,
82 [IEEE80211_M_WDS] = IEEE80211_C_WDS,
83 [IEEE80211_M_STA] = IEEE80211_C_STA,
84 [IEEE80211_M_AHDEMO] = IEEE80211_C_AHDEMO,
85 [IEEE80211_M_HOSTAP] = IEEE80211_C_HOSTAP,
86 [IEEE80211_M_MONITOR] = IEEE80211_C_MONITOR,
87 #ifdef IEEE80211_SUPPORT_MESH
88 [IEEE80211_M_MBSS] = IEEE80211_C_MBSS,
89 #endif
90 };
91
92 const uint8_t ieee80211broadcastaddr[IEEE80211_ADDR_LEN] =
93 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
94
95 static void ieee80211_syncflag_locked(struct ieee80211com *ic, int flag);
96 static void ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag);
97 static void ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag);
98 static void ieee80211_syncflag_vht_locked(struct ieee80211com *ic, int flag);
99 static int ieee80211_media_setup(struct ieee80211com *ic,
100 struct ifmedia *media, int caps, int addsta,
101 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat);
102 static int media_status(enum ieee80211_opmode,
103 const struct ieee80211_channel *);
104 static uint64_t ieee80211_get_counter(struct ifnet *, ift_counter);
105
106 MALLOC_DEFINE(M_80211_VAP, "80211vap", "802.11 vap state");
107
108 /*
109 * Default supported rates for 802.11 operation (in IEEE .5Mb units).
110 */
111 #define B(r) ((r) | IEEE80211_RATE_BASIC)
112 static const struct ieee80211_rateset ieee80211_rateset_11a =
113 { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } };
114 static const struct ieee80211_rateset ieee80211_rateset_half =
115 { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } };
116 static const struct ieee80211_rateset ieee80211_rateset_quarter =
117 { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } };
118 static const struct ieee80211_rateset ieee80211_rateset_11b =
119 { 4, { B(2), B(4), B(11), B(22) } };
120 /* NB: OFDM rates are handled specially based on mode */
121 static const struct ieee80211_rateset ieee80211_rateset_11g =
122 { 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } };
123 #undef B
124
125 static int set_vht_extchan(struct ieee80211_channel *c);
126
127 /*
128 * Fill in 802.11 available channel set, mark
129 * all available channels as active, and pick
130 * a default channel if not already specified.
131 */
132 void
133 ieee80211_chan_init(struct ieee80211com *ic)
134 {
135 #define DEFAULTRATES(m, def) do { \
136 if (ic->ic_sup_rates[m].rs_nrates == 0) \
137 ic->ic_sup_rates[m] = def; \
138 } while (0)
139 struct ieee80211_channel *c;
140 int i;
141
142 KASSERT(0 < ic->ic_nchans && ic->ic_nchans <= IEEE80211_CHAN_MAX,
143 ("invalid number of channels specified: %u", ic->ic_nchans));
144 memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail));
145 memset(ic->ic_modecaps, 0, sizeof(ic->ic_modecaps));
146 setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO);
147 for (i = 0; i < ic->ic_nchans; i++) {
148 c = &ic->ic_channels[i];
149 KASSERT(c->ic_flags != 0, ("channel with no flags"));
150 /*
151 * Help drivers that work only with frequencies by filling
152 * in IEEE channel #'s if not already calculated. Note this
153 * mimics similar work done in ieee80211_setregdomain when
154 * changing regulatory state.
155 */
156 if (c->ic_ieee == 0)
157 c->ic_ieee = ieee80211_mhz2ieee(c->ic_freq,c->ic_flags);
158
159 /*
160 * Setup the HT40/VHT40 upper/lower bits.
161 * The VHT80 math is done elsewhere.
162 */
163 if (IEEE80211_IS_CHAN_HT40(c) && c->ic_extieee == 0)
164 c->ic_extieee = ieee80211_mhz2ieee(c->ic_freq +
165 (IEEE80211_IS_CHAN_HT40U(c) ? 20 : -20),
166 c->ic_flags);
167
168 /* Update VHT math */
169 /*
170 * XXX VHT again, note that this assumes VHT80 channels
171 * are legit already
172 */
173 set_vht_extchan(c);
174
175 /* default max tx power to max regulatory */
176 if (c->ic_maxpower == 0)
177 c->ic_maxpower = 2*c->ic_maxregpower;
178 setbit(ic->ic_chan_avail, c->ic_ieee);
179 /*
180 * Identify mode capabilities.
181 */
182 if (IEEE80211_IS_CHAN_A(c))
183 setbit(ic->ic_modecaps, IEEE80211_MODE_11A);
184 if (IEEE80211_IS_CHAN_B(c))
185 setbit(ic->ic_modecaps, IEEE80211_MODE_11B);
186 if (IEEE80211_IS_CHAN_ANYG(c))
187 setbit(ic->ic_modecaps, IEEE80211_MODE_11G);
188 if (IEEE80211_IS_CHAN_FHSS(c))
189 setbit(ic->ic_modecaps, IEEE80211_MODE_FH);
190 if (IEEE80211_IS_CHAN_108A(c))
191 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A);
192 if (IEEE80211_IS_CHAN_108G(c))
193 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G);
194 if (IEEE80211_IS_CHAN_ST(c))
195 setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A);
196 if (IEEE80211_IS_CHAN_HALF(c))
197 setbit(ic->ic_modecaps, IEEE80211_MODE_HALF);
198 if (IEEE80211_IS_CHAN_QUARTER(c))
199 setbit(ic->ic_modecaps, IEEE80211_MODE_QUARTER);
200 if (IEEE80211_IS_CHAN_HTA(c))
201 setbit(ic->ic_modecaps, IEEE80211_MODE_11NA);
202 if (IEEE80211_IS_CHAN_HTG(c))
203 setbit(ic->ic_modecaps, IEEE80211_MODE_11NG);
204 if (IEEE80211_IS_CHAN_VHTA(c))
205 setbit(ic->ic_modecaps, IEEE80211_MODE_VHT_5GHZ);
206 if (IEEE80211_IS_CHAN_VHTG(c))
207 setbit(ic->ic_modecaps, IEEE80211_MODE_VHT_2GHZ);
208 }
209 /* initialize candidate channels to all available */
210 memcpy(ic->ic_chan_active, ic->ic_chan_avail,
211 sizeof(ic->ic_chan_avail));
212
213 /* sort channel table to allow lookup optimizations */
214 ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans);
215
216 /* invalidate any previous state */
217 ic->ic_bsschan = IEEE80211_CHAN_ANYC;
218 ic->ic_prevchan = NULL;
219 ic->ic_csa_newchan = NULL;
220 /* arbitrarily pick the first channel */
221 ic->ic_curchan = &ic->ic_channels[0];
222 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
223
224 /* fillin well-known rate sets if driver has not specified */
225 DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b);
226 DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g);
227 DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a);
228 DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a);
229 DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g);
230 DEFAULTRATES(IEEE80211_MODE_STURBO_A, ieee80211_rateset_11a);
231 DEFAULTRATES(IEEE80211_MODE_HALF, ieee80211_rateset_half);
232 DEFAULTRATES(IEEE80211_MODE_QUARTER, ieee80211_rateset_quarter);
233 DEFAULTRATES(IEEE80211_MODE_11NA, ieee80211_rateset_11a);
234 DEFAULTRATES(IEEE80211_MODE_11NG, ieee80211_rateset_11g);
235 DEFAULTRATES(IEEE80211_MODE_VHT_2GHZ, ieee80211_rateset_11g);
236 DEFAULTRATES(IEEE80211_MODE_VHT_5GHZ, ieee80211_rateset_11a);
237
238 /*
239 * Setup required information to fill the mcsset field, if driver did
240 * not. Assume a 2T2R setup for historic reasons.
241 */
242 if (ic->ic_rxstream == 0)
243 ic->ic_rxstream = 2;
244 if (ic->ic_txstream == 0)
245 ic->ic_txstream = 2;
246
247 ieee80211_init_suphtrates(ic);
248
249 /*
250 * Set auto mode to reset active channel state and any desired channel.
251 */
252 (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO);
253 #undef DEFAULTRATES
254 }
255
256 static void
257 null_update_mcast(struct ieee80211com *ic)
258 {
259
260 ic_printf(ic, "need multicast update callback\n");
261 }
262
263 static void
264 null_update_promisc(struct ieee80211com *ic)
265 {
266
267 ic_printf(ic, "need promiscuous mode update callback\n");
268 }
269
270 static void
271 null_update_chw(struct ieee80211com *ic)
272 {
273
274 ic_printf(ic, "%s: need callback\n", __func__);
275 }
276
277 int
278 ic_printf(struct ieee80211com *ic, const char * fmt, ...)
279 {
280 va_list ap;
281 int retval;
282
283 retval = printf("%s: ", ic->ic_name);
284 va_start(ap, fmt);
285 retval += vprintf(fmt, ap);
286 va_end(ap);
287 return (retval);
288 }
289
290 static LIST_HEAD(, ieee80211com) ic_head = LIST_HEAD_INITIALIZER(ic_head);
291 static struct mtx ic_list_mtx;
292 MTX_SYSINIT(ic_list, &ic_list_mtx, "ieee80211com list", MTX_DEF);
293
294 static int
295 sysctl_ieee80211coms(SYSCTL_HANDLER_ARGS)
296 {
297 struct ieee80211com *ic;
298 struct sbuf sb;
299 char *sp;
300 int error;
301
302 error = sysctl_wire_old_buffer(req, 0);
303 if (error)
304 return (error);
305 sbuf_new_for_sysctl(&sb, NULL, 8, req);
306 sbuf_clear_flags(&sb, SBUF_INCLUDENUL);
307 sp = "";
308 mtx_lock(&ic_list_mtx);
309 LIST_FOREACH(ic, &ic_head, ic_next) {
310 sbuf_printf(&sb, "%s%s", sp, ic->ic_name);
311 sp = " ";
312 }
313 mtx_unlock(&ic_list_mtx);
314 error = sbuf_finish(&sb);
315 sbuf_delete(&sb);
316 return (error);
317 }
318
319 SYSCTL_PROC(_net_wlan, OID_AUTO, devices,
320 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0,
321 sysctl_ieee80211coms, "A", "names of available 802.11 devices");
322
323 /*
324 * Attach/setup the common net80211 state. Called by
325 * the driver on attach to prior to creating any vap's.
326 */
327 void
328 ieee80211_ifattach(struct ieee80211com *ic)
329 {
330
331 IEEE80211_LOCK_INIT(ic, ic->ic_name);
332 IEEE80211_TX_LOCK_INIT(ic, ic->ic_name);
333 TAILQ_INIT(&ic->ic_vaps);
334
335 /* Create a taskqueue for all state changes */
336 ic->ic_tq = taskqueue_create("ic_taskq", M_WAITOK | M_ZERO,
337 taskqueue_thread_enqueue, &ic->ic_tq);
338 taskqueue_start_threads(&ic->ic_tq, 1, PI_NET, "%s net80211 taskq",
339 ic->ic_name);
340 ic->ic_ierrors = counter_u64_alloc(M_WAITOK);
341 ic->ic_oerrors = counter_u64_alloc(M_WAITOK);
342 /*
343 * Fill in 802.11 available channel set, mark all
344 * available channels as active, and pick a default
345 * channel if not already specified.
346 */
347 ieee80211_chan_init(ic);
348
349 ic->ic_update_mcast = null_update_mcast;
350 ic->ic_update_promisc = null_update_promisc;
351 ic->ic_update_chw = null_update_chw;
352
353 ic->ic_hash_key = arc4random();
354 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT;
355 ic->ic_lintval = ic->ic_bintval;
356 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX;
357
358 ieee80211_crypto_attach(ic);
359 ieee80211_node_attach(ic);
360 ieee80211_power_attach(ic);
361 ieee80211_proto_attach(ic);
362 #ifdef IEEE80211_SUPPORT_SUPERG
363 ieee80211_superg_attach(ic);
364 #endif
365 ieee80211_ht_attach(ic);
366 ieee80211_vht_attach(ic);
367 ieee80211_scan_attach(ic);
368 ieee80211_regdomain_attach(ic);
369 ieee80211_dfs_attach(ic);
370
371 ieee80211_sysctl_attach(ic);
372
373 mtx_lock(&ic_list_mtx);
374 LIST_INSERT_HEAD(&ic_head, ic, ic_next);
375 mtx_unlock(&ic_list_mtx);
376 }
377
378 /*
379 * Detach net80211 state on device detach. Tear down
380 * all vap's and reclaim all common state prior to the
381 * device state going away. Note we may call back into
382 * driver; it must be prepared for this.
383 */
384 void
385 ieee80211_ifdetach(struct ieee80211com *ic)
386 {
387 struct ieee80211vap *vap;
388
389 /*
390 * We use this as an indicator that ifattach never had a chance to be
391 * called, e.g. early driver attach failed and ifdetach was called
392 * during subsequent detach. Never fear, for we have nothing to do
393 * here.
394 */
395 if (ic->ic_tq == NULL)
396 return;
397
398 mtx_lock(&ic_list_mtx);
399 LIST_REMOVE(ic, ic_next);
400 mtx_unlock(&ic_list_mtx);
401
402 taskqueue_drain(taskqueue_thread, &ic->ic_restart_task);
403
404 /*
405 * The VAP is responsible for setting and clearing
406 * the VIMAGE context.
407 */
408 while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL)
409 ieee80211_vap_destroy(vap);
410 ieee80211_waitfor_parent(ic);
411
412 ieee80211_sysctl_detach(ic);
413 ieee80211_dfs_detach(ic);
414 ieee80211_regdomain_detach(ic);
415 ieee80211_scan_detach(ic);
416 #ifdef IEEE80211_SUPPORT_SUPERG
417 ieee80211_superg_detach(ic);
418 #endif
419 ieee80211_vht_detach(ic);
420 ieee80211_ht_detach(ic);
421 /* NB: must be called before ieee80211_node_detach */
422 ieee80211_proto_detach(ic);
423 ieee80211_crypto_detach(ic);
424 ieee80211_power_detach(ic);
425 ieee80211_node_detach(ic);
426
427 counter_u64_free(ic->ic_ierrors);
428 counter_u64_free(ic->ic_oerrors);
429
430 taskqueue_free(ic->ic_tq);
431 IEEE80211_TX_LOCK_DESTROY(ic);
432 IEEE80211_LOCK_DESTROY(ic);
433 }
434
435 struct ieee80211com *
436 ieee80211_find_com(const char *name)
437 {
438 struct ieee80211com *ic;
439
440 mtx_lock(&ic_list_mtx);
441 LIST_FOREACH(ic, &ic_head, ic_next)
442 if (strcmp(ic->ic_name, name) == 0)
443 break;
444 mtx_unlock(&ic_list_mtx);
445
446 return (ic);
447 }
448
449 void
450 ieee80211_iterate_coms(ieee80211_com_iter_func *f, void *arg)
451 {
452 struct ieee80211com *ic;
453
454 mtx_lock(&ic_list_mtx);
455 LIST_FOREACH(ic, &ic_head, ic_next)
456 (*f)(arg, ic);
457 mtx_unlock(&ic_list_mtx);
458 }
459
460 /*
461 * Default reset method for use with the ioctl support. This
462 * method is invoked after any state change in the 802.11
463 * layer that should be propagated to the hardware but not
464 * require re-initialization of the 802.11 state machine (e.g
465 * rescanning for an ap). We always return ENETRESET which
466 * should cause the driver to re-initialize the device. Drivers
467 * can override this method to implement more optimized support.
468 */
469 static int
470 default_reset(struct ieee80211vap *vap, u_long cmd)
471 {
472 return ENETRESET;
473 }
474
475 /*
476 * Default for updating the VAP default TX key index.
477 *
478 * Drivers that support TX offload as well as hardware encryption offload
479 * may need to be informed of key index changes separate from the key
480 * update.
481 */
482 static void
483 default_update_deftxkey(struct ieee80211vap *vap, ieee80211_keyix kid)
484 {
485
486 /* XXX assert validity */
487 /* XXX assert we're in a key update block */
488 vap->iv_def_txkey = kid;
489 }
490
491 /*
492 * Add underlying device errors to vap errors.
493 */
494 static uint64_t
495 ieee80211_get_counter(struct ifnet *ifp, ift_counter cnt)
496 {
497 struct ieee80211vap *vap = ifp->if_softc;
498 struct ieee80211com *ic = vap->iv_ic;
499 uint64_t rv;
500
501 rv = if_get_counter_default(ifp, cnt);
502 switch (cnt) {
503 case IFCOUNTER_OERRORS:
504 rv += counter_u64_fetch(ic->ic_oerrors);
505 break;
506 case IFCOUNTER_IERRORS:
507 rv += counter_u64_fetch(ic->ic_ierrors);
508 break;
509 default:
510 break;
511 }
512
513 return (rv);
514 }
515
516 /*
517 * Prepare a vap for use. Drivers use this call to
518 * setup net80211 state in new vap's prior attaching
519 * them with ieee80211_vap_attach (below).
520 */
521 int
522 ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap,
523 const char name[IFNAMSIZ], int unit, enum ieee80211_opmode opmode,
524 int flags, const uint8_t bssid[IEEE80211_ADDR_LEN])
525 {
526 struct ifnet *ifp;
527
528 ifp = if_alloc(IFT_ETHER);
529 if (ifp == NULL) {
530 ic_printf(ic, "%s: unable to allocate ifnet\n",
531 __func__);
532 return ENOMEM;
533 }
534 if_initname(ifp, name, unit);
535 ifp->if_softc = vap; /* back pointer */
536 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
537 ifp->if_transmit = ieee80211_vap_transmit;
538 ifp->if_qflush = ieee80211_vap_qflush;
539 ifp->if_ioctl = ieee80211_ioctl;
540 ifp->if_init = ieee80211_init;
541 ifp->if_get_counter = ieee80211_get_counter;
542
543 vap->iv_ifp = ifp;
544 vap->iv_ic = ic;
545 vap->iv_flags = ic->ic_flags; /* propagate common flags */
546 vap->iv_flags_ext = ic->ic_flags_ext;
547 vap->iv_flags_ven = ic->ic_flags_ven;
548 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE;
549
550 /* 11n capabilities - XXX methodize */
551 vap->iv_htcaps = ic->ic_htcaps;
552 vap->iv_htextcaps = ic->ic_htextcaps;
553
554 /* 11ac capabilities - XXX methodize */
555 vap->iv_vhtcaps = ic->ic_vhtcaps;
556 vap->iv_vhtextcaps = ic->ic_vhtextcaps;
557
558 vap->iv_opmode = opmode;
559 vap->iv_caps |= ieee80211_opcap[opmode];
560 IEEE80211_ADDR_COPY(vap->iv_myaddr, ic->ic_macaddr);
561 switch (opmode) {
562 case IEEE80211_M_WDS:
563 /*
564 * WDS links must specify the bssid of the far end.
565 * For legacy operation this is a static relationship.
566 * For non-legacy operation the station must associate
567 * and be authorized to pass traffic. Plumbing the
568 * vap to the proper node happens when the vap
569 * transitions to RUN state.
570 */
571 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid);
572 vap->iv_flags |= IEEE80211_F_DESBSSID;
573 if (flags & IEEE80211_CLONE_WDSLEGACY)
574 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY;
575 break;
576 #ifdef IEEE80211_SUPPORT_TDMA
577 case IEEE80211_M_AHDEMO:
578 if (flags & IEEE80211_CLONE_TDMA) {
579 /* NB: checked before clone operation allowed */
580 KASSERT(ic->ic_caps & IEEE80211_C_TDMA,
581 ("not TDMA capable, ic_caps 0x%x", ic->ic_caps));
582 /*
583 * Propagate TDMA capability to mark vap; this
584 * cannot be removed and is used to distinguish
585 * regular ahdemo operation from ahdemo+tdma.
586 */
587 vap->iv_caps |= IEEE80211_C_TDMA;
588 }
589 break;
590 #endif
591 default:
592 break;
593 }
594 /* auto-enable s/w beacon miss support */
595 if (flags & IEEE80211_CLONE_NOBEACONS)
596 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS;
597 /* auto-generated or user supplied MAC address */
598 if (flags & (IEEE80211_CLONE_BSSID|IEEE80211_CLONE_MACADDR))
599 vap->iv_flags_ext |= IEEE80211_FEXT_UNIQMAC;
600 /*
601 * Enable various functionality by default if we're
602 * capable; the driver can override us if it knows better.
603 */
604 if (vap->iv_caps & IEEE80211_C_WME)
605 vap->iv_flags |= IEEE80211_F_WME;
606 if (vap->iv_caps & IEEE80211_C_BURST)
607 vap->iv_flags |= IEEE80211_F_BURST;
608 /* NB: bg scanning only makes sense for station mode right now */
609 if (vap->iv_opmode == IEEE80211_M_STA &&
610 (vap->iv_caps & IEEE80211_C_BGSCAN))
611 vap->iv_flags |= IEEE80211_F_BGSCAN;
612 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */
613 /* NB: DFS support only makes sense for ap mode right now */
614 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
615 (vap->iv_caps & IEEE80211_C_DFS))
616 vap->iv_flags_ext |= IEEE80211_FEXT_DFS;
617
618 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */
619 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT;
620 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT;
621 /*
622 * Install a default reset method for the ioctl support;
623 * the driver can override this.
624 */
625 vap->iv_reset = default_reset;
626
627 /*
628 * Install a default crypto key update method, the driver
629 * can override this.
630 */
631 vap->iv_update_deftxkey = default_update_deftxkey;
632
633 ieee80211_sysctl_vattach(vap);
634 ieee80211_crypto_vattach(vap);
635 ieee80211_node_vattach(vap);
636 ieee80211_power_vattach(vap);
637 ieee80211_proto_vattach(vap);
638 #ifdef IEEE80211_SUPPORT_SUPERG
639 ieee80211_superg_vattach(vap);
640 #endif
641 ieee80211_ht_vattach(vap);
642 ieee80211_vht_vattach(vap);
643 ieee80211_scan_vattach(vap);
644 ieee80211_regdomain_vattach(vap);
645 ieee80211_radiotap_vattach(vap);
646 ieee80211_ratectl_set(vap, IEEE80211_RATECTL_NONE);
647
648 return 0;
649 }
650
651 /*
652 * Activate a vap. State should have been prepared with a
653 * call to ieee80211_vap_setup and by the driver. On return
654 * from this call the vap is ready for use.
655 */
656 int
657 ieee80211_vap_attach(struct ieee80211vap *vap, ifm_change_cb_t media_change,
658 ifm_stat_cb_t media_stat, const uint8_t macaddr[IEEE80211_ADDR_LEN])
659 {
660 struct ifnet *ifp = vap->iv_ifp;
661 struct ieee80211com *ic = vap->iv_ic;
662 struct ifmediareq imr;
663 int maxrate;
664
665 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
666 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n",
667 __func__, ieee80211_opmode_name[vap->iv_opmode],
668 ic->ic_name, vap->iv_flags, vap->iv_flags_ext);
669
670 /*
671 * Do late attach work that cannot happen until after
672 * the driver has had a chance to override defaults.
673 */
674 ieee80211_node_latevattach(vap);
675 ieee80211_power_latevattach(vap);
676
677 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps,
678 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat);
679 ieee80211_media_status(ifp, &imr);
680 /* NB: strip explicit mode; we're actually in autoselect */
681 ifmedia_set(&vap->iv_media,
682 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO));
683 if (maxrate)
684 ifp->if_baudrate = IF_Mbps(maxrate);
685
686 ether_ifattach(ifp, macaddr);
687 IEEE80211_ADDR_COPY(vap->iv_myaddr, IF_LLADDR(ifp));
688 /* hook output method setup by ether_ifattach */
689 vap->iv_output = ifp->if_output;
690 ifp->if_output = ieee80211_output;
691 /* NB: if_mtu set by ether_ifattach to ETHERMTU */
692
693 IEEE80211_LOCK(ic);
694 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next);
695 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
696 #ifdef IEEE80211_SUPPORT_SUPERG
697 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
698 #endif
699 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
700 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
701 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
702 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
703
704 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_VHT);
705 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT40);
706 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT80);
707 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT80P80);
708 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT160);
709 IEEE80211_UNLOCK(ic);
710
711 return 1;
712 }
713
714 /*
715 * Tear down vap state and reclaim the ifnet.
716 * The driver is assumed to have prepared for
717 * this; e.g. by turning off interrupts for the
718 * underlying device.
719 */
720 void
721 ieee80211_vap_detach(struct ieee80211vap *vap)
722 {
723 struct ieee80211com *ic = vap->iv_ic;
724 struct ifnet *ifp = vap->iv_ifp;
725
726 CURVNET_SET(ifp->if_vnet);
727
728 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n",
729 __func__, ieee80211_opmode_name[vap->iv_opmode], ic->ic_name);
730
731 /* NB: bpfdetach is called by ether_ifdetach and claims all taps */
732 ether_ifdetach(ifp);
733
734 ieee80211_stop(vap);
735
736 /*
737 * Flush any deferred vap tasks.
738 */
739 ieee80211_draintask(ic, &vap->iv_nstate_task);
740 ieee80211_draintask(ic, &vap->iv_swbmiss_task);
741 ieee80211_draintask(ic, &vap->iv_wme_task);
742 ieee80211_draintask(ic, &ic->ic_parent_task);
743
744 /* XXX band-aid until ifnet handles this for us */
745 taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
746
747 IEEE80211_LOCK(ic);
748 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running"));
749 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next);
750 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
751 #ifdef IEEE80211_SUPPORT_SUPERG
752 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
753 #endif
754 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
755 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
756 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
757 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
758
759 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_VHT);
760 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT40);
761 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT80);
762 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT80P80);
763 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT160);
764
765 /* NB: this handles the bpfdetach done below */
766 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF);
767 if (vap->iv_ifflags & IFF_PROMISC)
768 ieee80211_promisc(vap, false);
769 if (vap->iv_ifflags & IFF_ALLMULTI)
770 ieee80211_allmulti(vap, false);
771 IEEE80211_UNLOCK(ic);
772
773 ifmedia_removeall(&vap->iv_media);
774
775 ieee80211_radiotap_vdetach(vap);
776 ieee80211_regdomain_vdetach(vap);
777 ieee80211_scan_vdetach(vap);
778 #ifdef IEEE80211_SUPPORT_SUPERG
779 ieee80211_superg_vdetach(vap);
780 #endif
781 ieee80211_vht_vdetach(vap);
782 ieee80211_ht_vdetach(vap);
783 /* NB: must be before ieee80211_node_vdetach */
784 ieee80211_proto_vdetach(vap);
785 ieee80211_crypto_vdetach(vap);
786 ieee80211_power_vdetach(vap);
787 ieee80211_node_vdetach(vap);
788 ieee80211_sysctl_vdetach(vap);
789
790 if_free(ifp);
791
792 CURVNET_RESTORE();
793 }
794
795 /*
796 * Count number of vaps in promisc, and issue promisc on
797 * parent respectively.
798 */
799 void
800 ieee80211_promisc(struct ieee80211vap *vap, bool on)
801 {
802 struct ieee80211com *ic = vap->iv_ic;
803
804 IEEE80211_LOCK_ASSERT(ic);
805
806 if (on) {
807 if (++ic->ic_promisc == 1)
808 ieee80211_runtask(ic, &ic->ic_promisc_task);
809 } else {
810 KASSERT(ic->ic_promisc > 0, ("%s: ic %p not promisc",
811 __func__, ic));
812 if (--ic->ic_promisc == 0)
813 ieee80211_runtask(ic, &ic->ic_promisc_task);
814 }
815 }
816
817 /*
818 * Count number of vaps in allmulti, and issue allmulti on
819 * parent respectively.
820 */
821 void
822 ieee80211_allmulti(struct ieee80211vap *vap, bool on)
823 {
824 struct ieee80211com *ic = vap->iv_ic;
825
826 IEEE80211_LOCK_ASSERT(ic);
827
828 if (on) {
829 if (++ic->ic_allmulti == 1)
830 ieee80211_runtask(ic, &ic->ic_mcast_task);
831 } else {
832 KASSERT(ic->ic_allmulti > 0, ("%s: ic %p not allmulti",
833 __func__, ic));
834 if (--ic->ic_allmulti == 0)
835 ieee80211_runtask(ic, &ic->ic_mcast_task);
836 }
837 }
838
839 /*
840 * Synchronize flag bit state in the com structure
841 * according to the state of all vap's. This is used,
842 * for example, to handle state changes via ioctls.
843 */
844 static void
845 ieee80211_syncflag_locked(struct ieee80211com *ic, int flag)
846 {
847 struct ieee80211vap *vap;
848 int bit;
849
850 IEEE80211_LOCK_ASSERT(ic);
851
852 bit = 0;
853 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
854 if (vap->iv_flags & flag) {
855 bit = 1;
856 break;
857 }
858 if (bit)
859 ic->ic_flags |= flag;
860 else
861 ic->ic_flags &= ~flag;
862 }
863
864 void
865 ieee80211_syncflag(struct ieee80211vap *vap, int flag)
866 {
867 struct ieee80211com *ic = vap->iv_ic;
868
869 IEEE80211_LOCK(ic);
870 if (flag < 0) {
871 flag = -flag;
872 vap->iv_flags &= ~flag;
873 } else
874 vap->iv_flags |= flag;
875 ieee80211_syncflag_locked(ic, flag);
876 IEEE80211_UNLOCK(ic);
877 }
878
879 /*
880 * Synchronize flags_ht bit state in the com structure
881 * according to the state of all vap's. This is used,
882 * for example, to handle state changes via ioctls.
883 */
884 static void
885 ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag)
886 {
887 struct ieee80211vap *vap;
888 int bit;
889
890 IEEE80211_LOCK_ASSERT(ic);
891
892 bit = 0;
893 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
894 if (vap->iv_flags_ht & flag) {
895 bit = 1;
896 break;
897 }
898 if (bit)
899 ic->ic_flags_ht |= flag;
900 else
901 ic->ic_flags_ht &= ~flag;
902 }
903
904 void
905 ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag)
906 {
907 struct ieee80211com *ic = vap->iv_ic;
908
909 IEEE80211_LOCK(ic);
910 if (flag < 0) {
911 flag = -flag;
912 vap->iv_flags_ht &= ~flag;
913 } else
914 vap->iv_flags_ht |= flag;
915 ieee80211_syncflag_ht_locked(ic, flag);
916 IEEE80211_UNLOCK(ic);
917 }
918
919 /*
920 * Synchronize flags_vht bit state in the com structure
921 * according to the state of all vap's. This is used,
922 * for example, to handle state changes via ioctls.
923 */
924 static void
925 ieee80211_syncflag_vht_locked(struct ieee80211com *ic, int flag)
926 {
927 struct ieee80211vap *vap;
928 int bit;
929
930 IEEE80211_LOCK_ASSERT(ic);
931
932 bit = 0;
933 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
934 if (vap->iv_flags_vht & flag) {
935 bit = 1;
936 break;
937 }
938 if (bit)
939 ic->ic_flags_vht |= flag;
940 else
941 ic->ic_flags_vht &= ~flag;
942 }
943
944 void
945 ieee80211_syncflag_vht(struct ieee80211vap *vap, int flag)
946 {
947 struct ieee80211com *ic = vap->iv_ic;
948
949 IEEE80211_LOCK(ic);
950 if (flag < 0) {
951 flag = -flag;
952 vap->iv_flags_vht &= ~flag;
953 } else
954 vap->iv_flags_vht |= flag;
955 ieee80211_syncflag_vht_locked(ic, flag);
956 IEEE80211_UNLOCK(ic);
957 }
958
959 /*
960 * Synchronize flags_ext bit state in the com structure
961 * according to the state of all vap's. This is used,
962 * for example, to handle state changes via ioctls.
963 */
964 static void
965 ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag)
966 {
967 struct ieee80211vap *vap;
968 int bit;
969
970 IEEE80211_LOCK_ASSERT(ic);
971
972 bit = 0;
973 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
974 if (vap->iv_flags_ext & flag) {
975 bit = 1;
976 break;
977 }
978 if (bit)
979 ic->ic_flags_ext |= flag;
980 else
981 ic->ic_flags_ext &= ~flag;
982 }
983
984 void
985 ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag)
986 {
987 struct ieee80211com *ic = vap->iv_ic;
988
989 IEEE80211_LOCK(ic);
990 if (flag < 0) {
991 flag = -flag;
992 vap->iv_flags_ext &= ~flag;
993 } else
994 vap->iv_flags_ext |= flag;
995 ieee80211_syncflag_ext_locked(ic, flag);
996 IEEE80211_UNLOCK(ic);
997 }
998
999 static __inline int
1000 mapgsm(u_int freq, u_int flags)
1001 {
1002 freq *= 10;
1003 if (flags & IEEE80211_CHAN_QUARTER)
1004 freq += 5;
1005 else if (flags & IEEE80211_CHAN_HALF)
1006 freq += 10;
1007 else
1008 freq += 20;
1009 /* NB: there is no 907/20 wide but leave room */
1010 return (freq - 906*10) / 5;
1011 }
1012
1013 static __inline int
1014 mappsb(u_int freq, u_int flags)
1015 {
1016 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5;
1017 }
1018
1019 /*
1020 * Convert MHz frequency to IEEE channel number.
1021 */
1022 int
1023 ieee80211_mhz2ieee(u_int freq, u_int flags)
1024 {
1025 #define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990)
1026 if (flags & IEEE80211_CHAN_GSM)
1027 return mapgsm(freq, flags);
1028 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
1029 if (freq == 2484)
1030 return 14;
1031 if (freq < 2484)
1032 return ((int) freq - 2407) / 5;
1033 else
1034 return 15 + ((freq - 2512) / 20);
1035 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */
1036 if (freq <= 5000) {
1037 /* XXX check regdomain? */
1038 if (IS_FREQ_IN_PSB(freq))
1039 return mappsb(freq, flags);
1040 return (freq - 4000) / 5;
1041 } else
1042 return (freq - 5000) / 5;
1043 } else { /* either, guess */
1044 if (freq == 2484)
1045 return 14;
1046 if (freq < 2484) {
1047 if (907 <= freq && freq <= 922)
1048 return mapgsm(freq, flags);
1049 return ((int) freq - 2407) / 5;
1050 }
1051 if (freq < 5000) {
1052 if (IS_FREQ_IN_PSB(freq))
1053 return mappsb(freq, flags);
1054 else if (freq > 4900)
1055 return (freq - 4000) / 5;
1056 else
1057 return 15 + ((freq - 2512) / 20);
1058 }
1059 return (freq - 5000) / 5;
1060 }
1061 #undef IS_FREQ_IN_PSB
1062 }
1063
1064 /*
1065 * Convert channel to IEEE channel number.
1066 */
1067 int
1068 ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c)
1069 {
1070 if (c == NULL) {
1071 ic_printf(ic, "invalid channel (NULL)\n");
1072 return 0; /* XXX */
1073 }
1074 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee);
1075 }
1076
1077 /*
1078 * Convert IEEE channel number to MHz frequency.
1079 */
1080 u_int
1081 ieee80211_ieee2mhz(u_int chan, u_int flags)
1082 {
1083 if (flags & IEEE80211_CHAN_GSM)
1084 return 907 + 5 * (chan / 10);
1085 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
1086 if (chan == 14)
1087 return 2484;
1088 if (chan < 14)
1089 return 2407 + chan*5;
1090 else
1091 return 2512 + ((chan-15)*20);
1092 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */
1093 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) {
1094 chan -= 37;
1095 return 4940 + chan*5 + (chan % 5 ? 2 : 0);
1096 }
1097 return 5000 + (chan*5);
1098 } else { /* either, guess */
1099 /* XXX can't distinguish PSB+GSM channels */
1100 if (chan == 14)
1101 return 2484;
1102 if (chan < 14) /* 0-13 */
1103 return 2407 + chan*5;
1104 if (chan < 27) /* 15-26 */
1105 return 2512 + ((chan-15)*20);
1106 return 5000 + (chan*5);
1107 }
1108 }
1109
1110 static __inline void
1111 set_extchan(struct ieee80211_channel *c)
1112 {
1113
1114 /*
1115 * IEEE Std 802.11-2012, page 1738, subclause 20.3.15.4:
1116 * "the secondary channel number shall be 'N + [1,-1] * 4'
1117 */
1118 if (c->ic_flags & IEEE80211_CHAN_HT40U)
1119 c->ic_extieee = c->ic_ieee + 4;
1120 else if (c->ic_flags & IEEE80211_CHAN_HT40D)
1121 c->ic_extieee = c->ic_ieee - 4;
1122 else
1123 c->ic_extieee = 0;
1124 }
1125
1126 /*
1127 * Populate the freq1/freq2 fields as appropriate for VHT channels.
1128 *
1129 * This for now uses a hard-coded list of 80MHz wide channels.
1130 *
1131 * For HT20/HT40, freq1 just is the centre frequency of the 40MHz
1132 * wide channel we've already decided upon.
1133 *
1134 * For VHT80 and VHT160, there are only a small number of fixed
1135 * 80/160MHz wide channels, so we just use those.
1136 *
1137 * This is all likely very very wrong - both the regulatory code
1138 * and this code needs to ensure that all four channels are
1139 * available and valid before the VHT80 (and eight for VHT160) channel
1140 * is created.
1141 */
1142
1143 struct vht_chan_range {
1144 uint16_t freq_start;
1145 uint16_t freq_end;
1146 };
1147
1148 struct vht_chan_range vht80_chan_ranges[] = {
1149 { 5170, 5250 },
1150 { 5250, 5330 },
1151 { 5490, 5570 },
1152 { 5570, 5650 },
1153 { 5650, 5730 },
1154 { 5735, 5815 },
1155 { 0, 0, }
1156 };
1157
1158 static int
1159 set_vht_extchan(struct ieee80211_channel *c)
1160 {
1161 int i;
1162
1163 if (! IEEE80211_IS_CHAN_VHT(c)) {
1164 return (0);
1165 }
1166
1167 if (IEEE80211_IS_CHAN_VHT20(c)) {
1168 c->ic_vht_ch_freq1 = c->ic_ieee;
1169 return (1);
1170 }
1171
1172 if (IEEE80211_IS_CHAN_VHT40(c)) {
1173 if (IEEE80211_IS_CHAN_HT40U(c))
1174 c->ic_vht_ch_freq1 = c->ic_ieee + 2;
1175 else if (IEEE80211_IS_CHAN_HT40D(c))
1176 c->ic_vht_ch_freq1 = c->ic_ieee - 2;
1177 else
1178 return (0);
1179 return (1);
1180 }
1181
1182 if (IEEE80211_IS_CHAN_VHT80(c)) {
1183 for (i = 0; vht80_chan_ranges[i].freq_start != 0; i++) {
1184 if (c->ic_freq >= vht80_chan_ranges[i].freq_start &&
1185 c->ic_freq < vht80_chan_ranges[i].freq_end) {
1186 int midpoint;
1187
1188 midpoint = vht80_chan_ranges[i].freq_start + 40;
1189 c->ic_vht_ch_freq1 =
1190 ieee80211_mhz2ieee(midpoint, c->ic_flags);
1191 c->ic_vht_ch_freq2 = 0;
1192 #if 0
1193 printf("%s: %d, freq=%d, midpoint=%d, freq1=%d, freq2=%d\n",
1194 __func__, c->ic_ieee, c->ic_freq, midpoint,
1195 c->ic_vht_ch_freq1, c->ic_vht_ch_freq2);
1196 #endif
1197 return (1);
1198 }
1199 }
1200 return (0);
1201 }
1202
1203 printf("%s: unknown VHT channel type (ieee=%d, flags=0x%08x)\n",
1204 __func__,
1205 c->ic_ieee,
1206 c->ic_flags);
1207
1208 return (0);
1209 }
1210
1211 /*
1212 * Return whether the current channel could possibly be a part of
1213 * a VHT80 channel.
1214 *
1215 * This doesn't check that the whole range is in the allowed list
1216 * according to regulatory.
1217 */
1218 static int
1219 is_vht80_valid_freq(uint16_t freq)
1220 {
1221 int i;
1222 for (i = 0; vht80_chan_ranges[i].freq_start != 0; i++) {
1223 if (freq >= vht80_chan_ranges[i].freq_start &&
1224 freq < vht80_chan_ranges[i].freq_end)
1225 return (1);
1226 }
1227 return (0);
1228 }
1229
1230 static int
1231 addchan(struct ieee80211_channel chans[], int maxchans, int *nchans,
1232 uint8_t ieee, uint16_t freq, int8_t maxregpower, uint32_t flags)
1233 {
1234 struct ieee80211_channel *c;
1235
1236 if (*nchans >= maxchans)
1237 return (ENOBUFS);
1238
1239 #if 0
1240 printf("%s: %d: ieee=%d, freq=%d, flags=0x%08x\n",
1241 __func__,
1242 *nchans,
1243 ieee,
1244 freq,
1245 flags);
1246 #endif
1247
1248 c = &chans[(*nchans)++];
1249 c->ic_ieee = ieee;
1250 c->ic_freq = freq != 0 ? freq : ieee80211_ieee2mhz(ieee, flags);
1251 c->ic_maxregpower = maxregpower;
1252 c->ic_maxpower = 2 * maxregpower;
1253 c->ic_flags = flags;
1254 c->ic_vht_ch_freq1 = 0;
1255 c->ic_vht_ch_freq2 = 0;
1256 set_extchan(c);
1257 set_vht_extchan(c);
1258
1259 return (0);
1260 }
1261
1262 static int
1263 copychan_prev(struct ieee80211_channel chans[], int maxchans, int *nchans,
1264 uint32_t flags)
1265 {
1266 struct ieee80211_channel *c;
1267
1268 KASSERT(*nchans > 0, ("channel list is empty\n"));
1269
1270 if (*nchans >= maxchans)
1271 return (ENOBUFS);
1272
1273 #if 0
1274 printf("%s: %d: flags=0x%08x\n",
1275 __func__,
1276 *nchans,
1277 flags);
1278 #endif
1279
1280 c = &chans[(*nchans)++];
1281 c[0] = c[-1];
1282 c->ic_flags = flags;
1283 c->ic_vht_ch_freq1 = 0;
1284 c->ic_vht_ch_freq2 = 0;
1285 set_extchan(c);
1286 set_vht_extchan(c);
1287
1288 return (0);
1289 }
1290
1291 /*
1292 * XXX VHT-2GHz
1293 */
1294 static void
1295 getflags_2ghz(const uint8_t bands[], uint32_t flags[], int ht40)
1296 {
1297 int nmodes;
1298
1299 nmodes = 0;
1300 if (isset(bands, IEEE80211_MODE_11B))
1301 flags[nmodes++] = IEEE80211_CHAN_B;
1302 if (isset(bands, IEEE80211_MODE_11G))
1303 flags[nmodes++] = IEEE80211_CHAN_G;
1304 if (isset(bands, IEEE80211_MODE_11NG))
1305 flags[nmodes++] = IEEE80211_CHAN_G | IEEE80211_CHAN_HT20;
1306 if (ht40) {
1307 flags[nmodes++] = IEEE80211_CHAN_G | IEEE80211_CHAN_HT40U;
1308 flags[nmodes++] = IEEE80211_CHAN_G | IEEE80211_CHAN_HT40D;
1309 }
1310 flags[nmodes] = 0;
1311 }
1312
1313 static void
1314 getflags_5ghz(const uint8_t bands[], uint32_t flags[], int ht40, int vht80)
1315 {
1316 int nmodes;
1317
1318 /*
1319 * the addchan_list function seems to expect the flags array to
1320 * be in channel width order, so the VHT bits are interspersed
1321 * as appropriate to maintain said order.
1322 *
1323 * It also assumes HT40U is before HT40D.
1324 */
1325 nmodes = 0;
1326
1327 /* 20MHz */
1328 if (isset(bands, IEEE80211_MODE_11A))
1329 flags[nmodes++] = IEEE80211_CHAN_A;
1330 if (isset(bands, IEEE80211_MODE_11NA))
1331 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT20;
1332 if (isset(bands, IEEE80211_MODE_VHT_5GHZ)) {
1333 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT20 |
1334 IEEE80211_CHAN_VHT20;
1335 }
1336
1337 /* 40MHz */
1338 if (ht40) {
1339 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40U;
1340 }
1341 if (ht40 && isset(bands, IEEE80211_MODE_VHT_5GHZ)) {
1342 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40U
1343 | IEEE80211_CHAN_VHT40U;
1344 }
1345 if (ht40) {
1346 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40D;
1347 }
1348 if (ht40 && isset(bands, IEEE80211_MODE_VHT_5GHZ)) {
1349 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40D
1350 | IEEE80211_CHAN_VHT40D;
1351 }
1352
1353 /* 80MHz */
1354 if (vht80 && isset(bands, IEEE80211_MODE_VHT_5GHZ)) {
1355 flags[nmodes++] = IEEE80211_CHAN_A |
1356 IEEE80211_CHAN_HT40U | IEEE80211_CHAN_VHT80;
1357 flags[nmodes++] = IEEE80211_CHAN_A |
1358 IEEE80211_CHAN_HT40D | IEEE80211_CHAN_VHT80;
1359 }
1360
1361 /* XXX VHT80+80 */
1362 /* XXX VHT160 */
1363 flags[nmodes] = 0;
1364 }
1365
1366 static void
1367 getflags(const uint8_t bands[], uint32_t flags[], int ht40, int vht80)
1368 {
1369
1370 flags[0] = 0;
1371 if (isset(bands, IEEE80211_MODE_11A) ||
1372 isset(bands, IEEE80211_MODE_11NA) ||
1373 isset(bands, IEEE80211_MODE_VHT_5GHZ)) {
1374 if (isset(bands, IEEE80211_MODE_11B) ||
1375 isset(bands, IEEE80211_MODE_11G) ||
1376 isset(bands, IEEE80211_MODE_11NG) ||
1377 isset(bands, IEEE80211_MODE_VHT_2GHZ))
1378 return;
1379
1380 getflags_5ghz(bands, flags, ht40, vht80);
1381 } else
1382 getflags_2ghz(bands, flags, ht40);
1383 }
1384
1385 /*
1386 * Add one 20 MHz channel into specified channel list.
1387 */
1388 /* XXX VHT */
1389 int
1390 ieee80211_add_channel(struct ieee80211_channel chans[], int maxchans,
1391 int *nchans, uint8_t ieee, uint16_t freq, int8_t maxregpower,
1392 uint32_t chan_flags, const uint8_t bands[])
1393 {
1394 uint32_t flags[IEEE80211_MODE_MAX];
1395 int i, error;
1396
1397 getflags(bands, flags, 0, 0);
1398 KASSERT(flags[0] != 0, ("%s: no correct mode provided\n", __func__));
1399
1400 error = addchan(chans, maxchans, nchans, ieee, freq, maxregpower,
1401 flags[0] | chan_flags);
1402 for (i = 1; flags[i] != 0 && error == 0; i++) {
1403 error = copychan_prev(chans, maxchans, nchans,
1404 flags[i] | chan_flags);
1405 }
1406
1407 return (error);
1408 }
1409
1410 static struct ieee80211_channel *
1411 findchannel(struct ieee80211_channel chans[], int nchans, uint16_t freq,
1412 uint32_t flags)
1413 {
1414 struct ieee80211_channel *c;
1415 int i;
1416
1417 flags &= IEEE80211_CHAN_ALLTURBO;
1418 /* brute force search */
1419 for (i = 0; i < nchans; i++) {
1420 c = &chans[i];
1421 if (c->ic_freq == freq &&
1422 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
1423 return c;
1424 }
1425 return NULL;
1426 }
1427
1428 /*
1429 * Add 40 MHz channel pair into specified channel list.
1430 */
1431 /* XXX VHT */
1432 int
1433 ieee80211_add_channel_ht40(struct ieee80211_channel chans[], int maxchans,
1434 int *nchans, uint8_t ieee, int8_t maxregpower, uint32_t flags)
1435 {
1436 struct ieee80211_channel *cent, *extc;
1437 uint16_t freq;
1438 int error;
1439
1440 freq = ieee80211_ieee2mhz(ieee, flags);
1441
1442 /*
1443 * Each entry defines an HT40 channel pair; find the
1444 * center channel, then the extension channel above.
1445 */
1446 flags |= IEEE80211_CHAN_HT20;
1447 cent = findchannel(chans, *nchans, freq, flags);
1448 if (cent == NULL)
1449 return (EINVAL);
1450
1451 extc = findchannel(chans, *nchans, freq + 20, flags);
1452 if (extc == NULL)
1453 return (ENOENT);
1454
1455 flags &= ~IEEE80211_CHAN_HT;
1456 error = addchan(chans, maxchans, nchans, cent->ic_ieee, cent->ic_freq,
1457 maxregpower, flags | IEEE80211_CHAN_HT40U);
1458 if (error != 0)
1459 return (error);
1460
1461 error = addchan(chans, maxchans, nchans, extc->ic_ieee, extc->ic_freq,
1462 maxregpower, flags | IEEE80211_CHAN_HT40D);
1463
1464 return (error);
1465 }
1466
1467 /*
1468 * Fetch the center frequency for the primary channel.
1469 */
1470 uint32_t
1471 ieee80211_get_channel_center_freq(const struct ieee80211_channel *c)
1472 {
1473
1474 return (c->ic_freq);
1475 }
1476
1477 /*
1478 * Fetch the center frequency for the primary BAND channel.
1479 *
1480 * For 5, 10, 20MHz channels it'll be the normally configured channel
1481 * frequency.
1482 *
1483 * For 40MHz, 80MHz, 160Mhz channels it'll the the centre of the
1484 * wide channel, not the centre of the primary channel (that's ic_freq).
1485 *
1486 * For 80+80MHz channels this will be the centre of the primary
1487 * 80MHz channel; the secondary 80MHz channel will be center_freq2().
1488 */
1489 uint32_t
1490 ieee80211_get_channel_center_freq1(const struct ieee80211_channel *c)
1491 {
1492
1493 /*
1494 * VHT - use the pre-calculated centre frequency
1495 * of the given channel.
1496 */
1497 if (IEEE80211_IS_CHAN_VHT(c))
1498 return (ieee80211_ieee2mhz(c->ic_vht_ch_freq1, c->ic_flags));
1499
1500 if (IEEE80211_IS_CHAN_HT40U(c)) {
1501 return (c->ic_freq + 10);
1502 }
1503 if (IEEE80211_IS_CHAN_HT40D(c)) {
1504 return (c->ic_freq - 10);
1505 }
1506
1507 return (c->ic_freq);
1508 }
1509
1510 /*
1511 * For now, no 80+80 support; it will likely always return 0.
1512 */
1513 uint32_t
1514 ieee80211_get_channel_center_freq2(const struct ieee80211_channel *c)
1515 {
1516
1517 if (IEEE80211_IS_CHAN_VHT(c) && (c->ic_vht_ch_freq2 != 0))
1518 return (ieee80211_ieee2mhz(c->ic_vht_ch_freq2, c->ic_flags));
1519
1520 return (0);
1521 }
1522
1523 /*
1524 * Adds channels into specified channel list (ieee[] array must be sorted).
1525 * Channels are already sorted.
1526 */
1527 static int
1528 add_chanlist(struct ieee80211_channel chans[], int maxchans, int *nchans,
1529 const uint8_t ieee[], int nieee, uint32_t flags[])
1530 {
1531 uint16_t freq;
1532 int i, j, error;
1533 int is_vht;
1534
1535 for (i = 0; i < nieee; i++) {
1536 freq = ieee80211_ieee2mhz(ieee[i], flags[0]);
1537 for (j = 0; flags[j] != 0; j++) {
1538 /*
1539 * Notes:
1540 * + HT40 and VHT40 channels occur together, so
1541 * we need to be careful that we actually allow that.
1542 * + VHT80, VHT160 will coexist with HT40/VHT40, so
1543 * make sure it's not skipped because of the overlap
1544 * check used for (V)HT40.
1545 */
1546 is_vht = !! (flags[j] & IEEE80211_CHAN_VHT);
1547
1548 /*
1549 * Test for VHT80.
1550 * XXX This is all very broken right now.
1551 * What we /should/ do is:
1552 *
1553 * + check that the frequency is in the list of
1554 * allowed VHT80 ranges; and
1555 * + the other 3 channels in the list are actually
1556 * also available.
1557 */
1558 if (is_vht && flags[j] & IEEE80211_CHAN_VHT80)
1559 if (! is_vht80_valid_freq(freq))
1560 continue;
1561
1562 /*
1563 * Test for (V)HT40.
1564 *
1565 * This is also a fall through from VHT80; as we only
1566 * allow a VHT80 channel if the VHT40 combination is
1567 * also valid. If the VHT40 form is not valid then
1568 * we certainly can't do VHT80..
1569 */
1570 if (flags[j] & IEEE80211_CHAN_HT40D)
1571 /*
1572 * Can't have a "lower" channel if we are the
1573 * first channel.
1574 *
1575 * Can't have a "lower" channel if it's below/
1576 * within 20MHz of the first channel.
1577 *
1578 * Can't have a "lower" channel if the channel
1579 * below it is not 20MHz away.
1580 */
1581 if (i == 0 || ieee[i] < ieee[0] + 4 ||
1582 freq - 20 !=
1583 ieee80211_ieee2mhz(ieee[i] - 4, flags[j]))
1584 continue;
1585 if (flags[j] & IEEE80211_CHAN_HT40U)
1586 /*
1587 * Can't have an "upper" channel if we are
1588 * the last channel.
1589 *
1590 * Can't have an "upper" channel be above the
1591 * last channel in the list.
1592 *
1593 * Can't have an "upper" channel if the next
1594 * channel according to the math isn't 20MHz
1595 * away. (Likely for channel 13/14.)
1596 */
1597 if (i == nieee - 1 ||
1598 ieee[i] + 4 > ieee[nieee - 1] ||
1599 freq + 20 !=
1600 ieee80211_ieee2mhz(ieee[i] + 4, flags[j]))
1601 continue;
1602
1603 if (j == 0) {
1604 error = addchan(chans, maxchans, nchans,
1605 ieee[i], freq, 0, flags[j]);
1606 } else {
1607 error = copychan_prev(chans, maxchans, nchans,
1608 flags[j]);
1609 }
1610 if (error != 0)
1611 return (error);
1612 }
1613 }
1614
1615 return (0);
1616 }
1617
1618 int
1619 ieee80211_add_channel_list_2ghz(struct ieee80211_channel chans[], int maxchans,
1620 int *nchans, const uint8_t ieee[], int nieee, const uint8_t bands[],
1621 int ht40)
1622 {
1623 uint32_t flags[IEEE80211_MODE_MAX];
1624
1625 /* XXX no VHT for now */
1626 getflags_2ghz(bands, flags, ht40);
1627 KASSERT(flags[0] != 0, ("%s: no correct mode provided\n", __func__));
1628
1629 return (add_chanlist(chans, maxchans, nchans, ieee, nieee, flags));
1630 }
1631
1632 int
1633 ieee80211_add_channel_list_5ghz(struct ieee80211_channel chans[], int maxchans,
1634 int *nchans, const uint8_t ieee[], int nieee, const uint8_t bands[],
1635 int ht40)
1636 {
1637 uint32_t flags[IEEE80211_MODE_MAX];
1638 int vht80 = 0;
1639
1640 /*
1641 * For now, assume VHT == VHT80 support as a minimum.
1642 */
1643 if (isset(bands, IEEE80211_MODE_VHT_5GHZ))
1644 vht80 = 1;
1645
1646 getflags_5ghz(bands, flags, ht40, vht80);
1647 KASSERT(flags[0] != 0, ("%s: no correct mode provided\n", __func__));
1648
1649 return (add_chanlist(chans, maxchans, nchans, ieee, nieee, flags));
1650 }
1651
1652 /*
1653 * Locate a channel given a frequency+flags. We cache
1654 * the previous lookup to optimize switching between two
1655 * channels--as happens with dynamic turbo.
1656 */
1657 struct ieee80211_channel *
1658 ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags)
1659 {
1660 struct ieee80211_channel *c;
1661
1662 flags &= IEEE80211_CHAN_ALLTURBO;
1663 c = ic->ic_prevchan;
1664 if (c != NULL && c->ic_freq == freq &&
1665 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
1666 return c;
1667 /* brute force search */
1668 return (findchannel(ic->ic_channels, ic->ic_nchans, freq, flags));
1669 }
1670
1671 /*
1672 * Locate a channel given a channel number+flags. We cache
1673 * the previous lookup to optimize switching between two
1674 * channels--as happens with dynamic turbo.
1675 */
1676 struct ieee80211_channel *
1677 ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags)
1678 {
1679 struct ieee80211_channel *c;
1680 int i;
1681
1682 flags &= IEEE80211_CHAN_ALLTURBO;
1683 c = ic->ic_prevchan;
1684 if (c != NULL && c->ic_ieee == ieee &&
1685 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
1686 return c;
1687 /* brute force search */
1688 for (i = 0; i < ic->ic_nchans; i++) {
1689 c = &ic->ic_channels[i];
1690 if (c->ic_ieee == ieee &&
1691 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
1692 return c;
1693 }
1694 return NULL;
1695 }
1696
1697 /*
1698 * Lookup a channel suitable for the given rx status.
1699 *
1700 * This is used to find a channel for a frame (eg beacon, probe
1701 * response) based purely on the received PHY information.
1702 *
1703 * For now it tries to do it based on R_FREQ / R_IEEE.
1704 * This is enough for 11bg and 11a (and thus 11ng/11na)
1705 * but it will not be enough for GSM, PSB channels and the
1706 * like. It also doesn't know about legacy-turbog and
1707 * legacy-turbo modes, which some offload NICs actually
1708 * support in weird ways.
1709 *
1710 * Takes the ic and rxstatus; returns the channel or NULL
1711 * if not found.
1712 *
1713 * XXX TODO: Add support for that when the need arises.
1714 */
1715 struct ieee80211_channel *
1716 ieee80211_lookup_channel_rxstatus(struct ieee80211vap *vap,
1717 const struct ieee80211_rx_stats *rxs)
1718 {
1719 struct ieee80211com *ic = vap->iv_ic;
1720 uint32_t flags;
1721 struct ieee80211_channel *c;
1722
1723 if (rxs == NULL)
1724 return (NULL);
1725
1726 /*
1727 * Strictly speaking we only use freq for now,
1728 * however later on we may wish to just store
1729 * the ieee for verification.
1730 */
1731 if ((rxs->r_flags & IEEE80211_R_FREQ) == 0)
1732 return (NULL);
1733 if ((rxs->r_flags & IEEE80211_R_IEEE) == 0)
1734 return (NULL);
1735
1736 /*
1737 * If the rx status contains a valid ieee/freq, then
1738 * ensure we populate the correct channel information
1739 * in rxchan before passing it up to the scan infrastructure.
1740 * Offload NICs will pass up beacons from all channels
1741 * during background scans.
1742 */
1743
1744 /* Determine a band */
1745 /* XXX should be done by the driver? */
1746 if (rxs->c_freq < 3000) {
1747 flags = IEEE80211_CHAN_G;
1748 } else {
1749 flags = IEEE80211_CHAN_A;
1750 }
1751
1752 /* Channel lookup */
1753 c = ieee80211_find_channel(ic, rxs->c_freq, flags);
1754
1755 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INPUT,
1756 "%s: freq=%d, ieee=%d, flags=0x%08x; c=%p\n",
1757 __func__,
1758 (int) rxs->c_freq,
1759 (int) rxs->c_ieee,
1760 flags,
1761 c);
1762
1763 return (c);
1764 }
1765
1766 static void
1767 addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword)
1768 {
1769 #define ADD(_ic, _s, _o) \
1770 ifmedia_add(media, \
1771 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL)
1772 static const u_int mopts[IEEE80211_MODE_MAX] = {
1773 [IEEE80211_MODE_AUTO] = IFM_AUTO,
1774 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A,
1775 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B,
1776 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G,
1777 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH,
1778 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
1779 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO,
1780 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
1781 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */
1782 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */
1783 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA,
1784 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG,
1785 [IEEE80211_MODE_VHT_2GHZ] = IFM_IEEE80211_VHT2G,
1786 [IEEE80211_MODE_VHT_5GHZ] = IFM_IEEE80211_VHT5G,
1787 };
1788 u_int mopt;
1789
1790 mopt = mopts[mode];
1791 if (addsta)
1792 ADD(ic, mword, mopt); /* STA mode has no cap */
1793 if (caps & IEEE80211_C_IBSS)
1794 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC);
1795 if (caps & IEEE80211_C_HOSTAP)
1796 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP);
1797 if (caps & IEEE80211_C_AHDEMO)
1798 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0);
1799 if (caps & IEEE80211_C_MONITOR)
1800 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR);
1801 if (caps & IEEE80211_C_WDS)
1802 ADD(media, mword, mopt | IFM_IEEE80211_WDS);
1803 if (caps & IEEE80211_C_MBSS)
1804 ADD(media, mword, mopt | IFM_IEEE80211_MBSS);
1805 #undef ADD
1806 }
1807
1808 /*
1809 * Setup the media data structures according to the channel and
1810 * rate tables.
1811 */
1812 static int
1813 ieee80211_media_setup(struct ieee80211com *ic,
1814 struct ifmedia *media, int caps, int addsta,
1815 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
1816 {
1817 int i, j, rate, maxrate, mword, r;
1818 enum ieee80211_phymode mode;
1819 const struct ieee80211_rateset *rs;
1820 struct ieee80211_rateset allrates;
1821
1822 /*
1823 * Fill in media characteristics.
1824 */
1825 ifmedia_init(media, 0, media_change, media_stat);
1826 maxrate = 0;
1827 /*
1828 * Add media for legacy operating modes.
1829 */
1830 memset(&allrates, 0, sizeof(allrates));
1831 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) {
1832 if (isclr(ic->ic_modecaps, mode))
1833 continue;
1834 addmedia(media, caps, addsta, mode, IFM_AUTO);
1835 if (mode == IEEE80211_MODE_AUTO)
1836 continue;
1837 rs = &ic->ic_sup_rates[mode];
1838 for (i = 0; i < rs->rs_nrates; i++) {
1839 rate = rs->rs_rates[i];
1840 mword = ieee80211_rate2media(ic, rate, mode);
1841 if (mword == 0)
1842 continue;
1843 addmedia(media, caps, addsta, mode, mword);
1844 /*
1845 * Add legacy rate to the collection of all rates.
1846 */
1847 r = rate & IEEE80211_RATE_VAL;
1848 for (j = 0; j < allrates.rs_nrates; j++)
1849 if (allrates.rs_rates[j] == r)
1850 break;
1851 if (j == allrates.rs_nrates) {
1852 /* unique, add to the set */
1853 allrates.rs_rates[j] = r;
1854 allrates.rs_nrates++;
1855 }
1856 rate = (rate & IEEE80211_RATE_VAL) / 2;
1857 if (rate > maxrate)
1858 maxrate = rate;
1859 }
1860 }
1861 for (i = 0; i < allrates.rs_nrates; i++) {
1862 mword = ieee80211_rate2media(ic, allrates.rs_rates[i],
1863 IEEE80211_MODE_AUTO);
1864 if (mword == 0)
1865 continue;
1866 /* NB: remove media options from mword */
1867 addmedia(media, caps, addsta,
1868 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword));
1869 }
1870 /*
1871 * Add HT/11n media. Note that we do not have enough
1872 * bits in the media subtype to express the MCS so we
1873 * use a "placeholder" media subtype and any fixed MCS
1874 * must be specified with a different mechanism.
1875 */
1876 for (; mode <= IEEE80211_MODE_11NG; mode++) {
1877 if (isclr(ic->ic_modecaps, mode))
1878 continue;
1879 addmedia(media, caps, addsta, mode, IFM_AUTO);
1880 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS);
1881 }
1882 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) ||
1883 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) {
1884 addmedia(media, caps, addsta,
1885 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS);
1886 i = ic->ic_txstream * 8 - 1;
1887 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) &&
1888 (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40))
1889 rate = ieee80211_htrates[i].ht40_rate_400ns;
1890 else if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40))
1891 rate = ieee80211_htrates[i].ht40_rate_800ns;
1892 else if ((ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20))
1893 rate = ieee80211_htrates[i].ht20_rate_400ns;
1894 else
1895 rate = ieee80211_htrates[i].ht20_rate_800ns;
1896 if (rate > maxrate)
1897 maxrate = rate;
1898 }
1899
1900 /*
1901 * Add VHT media.
1902 */
1903 for (; mode <= IEEE80211_MODE_VHT_5GHZ; mode++) {
1904 if (isclr(ic->ic_modecaps, mode))
1905 continue;
1906 addmedia(media, caps, addsta, mode, IFM_AUTO);
1907 addmedia(media, caps, addsta, mode, IFM_IEEE80211_VHT);
1908
1909 /* XXX TODO: VHT maxrate */
1910 }
1911
1912 return maxrate;
1913 }
1914
1915 /* XXX inline or eliminate? */
1916 const struct ieee80211_rateset *
1917 ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c)
1918 {
1919 /* XXX does this work for 11ng basic rates? */
1920 return &ic->ic_sup_rates[ieee80211_chan2mode(c)];
1921 }
1922
1923 /* XXX inline or eliminate? */
1924 const struct ieee80211_htrateset *
1925 ieee80211_get_suphtrates(struct ieee80211com *ic,
1926 const struct ieee80211_channel *c)
1927 {
1928 return &ic->ic_sup_htrates;
1929 }
1930
1931 void
1932 ieee80211_announce(struct ieee80211com *ic)
1933 {
1934 int i, rate, mword;
1935 enum ieee80211_phymode mode;
1936 const struct ieee80211_rateset *rs;
1937
1938 /* NB: skip AUTO since it has no rates */
1939 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) {
1940 if (isclr(ic->ic_modecaps, mode))
1941 continue;
1942 ic_printf(ic, "%s rates: ", ieee80211_phymode_name[mode]);
1943 rs = &ic->ic_sup_rates[mode];
1944 for (i = 0; i < rs->rs_nrates; i++) {
1945 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode);
1946 if (mword == 0)
1947 continue;
1948 rate = ieee80211_media2rate(mword);
1949 printf("%s%d%sMbps", (i != 0 ? " " : ""),
1950 rate / 2, ((rate & 0x1) != 0 ? ".5" : ""));
1951 }
1952 printf("\n");
1953 }
1954 ieee80211_ht_announce(ic);
1955 ieee80211_vht_announce(ic);
1956 }
1957
1958 void
1959 ieee80211_announce_channels(struct ieee80211com *ic)
1960 {
1961 const struct ieee80211_channel *c;
1962 char type;
1963 int i, cw;
1964
1965 printf("Chan Freq CW RegPwr MinPwr MaxPwr\n");
1966 for (i = 0; i < ic->ic_nchans; i++) {
1967 c = &ic->ic_channels[i];
1968 if (IEEE80211_IS_CHAN_ST(c))
1969 type = 'S';
1970 else if (IEEE80211_IS_CHAN_108A(c))
1971 type = 'T';
1972 else if (IEEE80211_IS_CHAN_108G(c))
1973 type = 'G';
1974 else if (IEEE80211_IS_CHAN_HT(c))
1975 type = 'n';
1976 else if (IEEE80211_IS_CHAN_A(c))
1977 type = 'a';
1978 else if (IEEE80211_IS_CHAN_ANYG(c))
1979 type = 'g';
1980 else if (IEEE80211_IS_CHAN_B(c))
1981 type = 'b';
1982 else
1983 type = 'f';
1984 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c))
1985 cw = 40;
1986 else if (IEEE80211_IS_CHAN_HALF(c))
1987 cw = 10;
1988 else if (IEEE80211_IS_CHAN_QUARTER(c))
1989 cw = 5;
1990 else
1991 cw = 20;
1992 printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n"
1993 , c->ic_ieee, c->ic_freq, type
1994 , cw
1995 , IEEE80211_IS_CHAN_HT40U(c) ? '+' :
1996 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' '
1997 , c->ic_maxregpower
1998 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0
1999 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0
2000 );
2001 }
2002 }
2003
2004 static int
2005 media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode)
2006 {
2007 switch (IFM_MODE(ime->ifm_media)) {
2008 case IFM_IEEE80211_11A:
2009 *mode = IEEE80211_MODE_11A;
2010 break;
2011 case IFM_IEEE80211_11B:
2012 *mode = IEEE80211_MODE_11B;
2013 break;
2014 case IFM_IEEE80211_11G:
2015 *mode = IEEE80211_MODE_11G;
2016 break;
2017 case IFM_IEEE80211_FH:
2018 *mode = IEEE80211_MODE_FH;
2019 break;
2020 case IFM_IEEE80211_11NA:
2021 *mode = IEEE80211_MODE_11NA;
2022 break;
2023 case IFM_IEEE80211_11NG:
2024 *mode = IEEE80211_MODE_11NG;
2025 break;
2026 case IFM_AUTO:
2027 *mode = IEEE80211_MODE_AUTO;
2028 break;
2029 default:
2030 return 0;
2031 }
2032 /*
2033 * Turbo mode is an ``option''.
2034 * XXX does not apply to AUTO
2035 */
2036 if (ime->ifm_media & IFM_IEEE80211_TURBO) {
2037 if (*mode == IEEE80211_MODE_11A) {
2038 if (flags & IEEE80211_F_TURBOP)
2039 *mode = IEEE80211_MODE_TURBO_A;
2040 else
2041 *mode = IEEE80211_MODE_STURBO_A;
2042 } else if (*mode == IEEE80211_MODE_11G)
2043 *mode = IEEE80211_MODE_TURBO_G;
2044 else
2045 return 0;
2046 }
2047 /* XXX HT40 +/- */
2048 return 1;
2049 }
2050
2051 /*
2052 * Handle a media change request on the vap interface.
2053 */
2054 int
2055 ieee80211_media_change(struct ifnet *ifp)
2056 {
2057 struct ieee80211vap *vap = ifp->if_softc;
2058 struct ifmedia_entry *ime = vap->iv_media.ifm_cur;
2059 uint16_t newmode;
2060
2061 if (!media2mode(ime, vap->iv_flags, &newmode))
2062 return EINVAL;
2063 if (vap->iv_des_mode != newmode) {
2064 vap->iv_des_mode = newmode;
2065 /* XXX kick state machine if up+running */
2066 }
2067 return 0;
2068 }
2069
2070 /*
2071 * Common code to calculate the media status word
2072 * from the operating mode and channel state.
2073 */
2074 static int
2075 media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan)
2076 {
2077 int status;
2078
2079 status = IFM_IEEE80211;
2080 switch (opmode) {
2081 case IEEE80211_M_STA:
2082 break;
2083 case IEEE80211_M_IBSS:
2084 status |= IFM_IEEE80211_ADHOC;
2085 break;
2086 case IEEE80211_M_HOSTAP:
2087 status |= IFM_IEEE80211_HOSTAP;
2088 break;
2089 case IEEE80211_M_MONITOR:
2090 status |= IFM_IEEE80211_MONITOR;
2091 break;
2092 case IEEE80211_M_AHDEMO:
2093 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0;
2094 break;
2095 case IEEE80211_M_WDS:
2096 status |= IFM_IEEE80211_WDS;
2097 break;
2098 case IEEE80211_M_MBSS:
2099 status |= IFM_IEEE80211_MBSS;
2100 break;
2101 }
2102 if (IEEE80211_IS_CHAN_HTA(chan)) {
2103 status |= IFM_IEEE80211_11NA;
2104 } else if (IEEE80211_IS_CHAN_HTG(chan)) {
2105 status |= IFM_IEEE80211_11NG;
2106 } else if (IEEE80211_IS_CHAN_A(chan)) {
2107 status |= IFM_IEEE80211_11A;
2108 } else if (IEEE80211_IS_CHAN_B(chan)) {
2109 status |= IFM_IEEE80211_11B;
2110 } else if (IEEE80211_IS_CHAN_ANYG(chan)) {
2111 status |= IFM_IEEE80211_11G;
2112 } else if (IEEE80211_IS_CHAN_FHSS(chan)) {
2113 status |= IFM_IEEE80211_FH;
2114 }
2115 /* XXX else complain? */
2116
2117 if (IEEE80211_IS_CHAN_TURBO(chan))
2118 status |= IFM_IEEE80211_TURBO;
2119 #if 0
2120 if (IEEE80211_IS_CHAN_HT20(chan))
2121 status |= IFM_IEEE80211_HT20;
2122 if (IEEE80211_IS_CHAN_HT40(chan))
2123 status |= IFM_IEEE80211_HT40;
2124 #endif
2125 return status;
2126 }
2127
2128 void
2129 ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr)
2130 {
2131 struct ieee80211vap *vap = ifp->if_softc;
2132 struct ieee80211com *ic = vap->iv_ic;
2133 enum ieee80211_phymode mode;
2134
2135 imr->ifm_status = IFM_AVALID;
2136 /*
2137 * NB: use the current channel's mode to lock down a xmit
2138 * rate only when running; otherwise we may have a mismatch
2139 * in which case the rate will not be convertible.
2140 */
2141 if (vap->iv_state == IEEE80211_S_RUN ||
2142 vap->iv_state == IEEE80211_S_SLEEP) {
2143 imr->ifm_status |= IFM_ACTIVE;
2144 mode = ieee80211_chan2mode(ic->ic_curchan);
2145 } else
2146 mode = IEEE80211_MODE_AUTO;
2147 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan);
2148 /*
2149 * Calculate a current rate if possible.
2150 */
2151 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) {
2152 /*
2153 * A fixed rate is set, report that.
2154 */
2155 imr->ifm_active |= ieee80211_rate2media(ic,
2156 vap->iv_txparms[mode].ucastrate, mode);
2157 } else if (vap->iv_opmode == IEEE80211_M_STA) {
2158 /*
2159 * In station mode report the current transmit rate.
2160 */
2161 imr->ifm_active |= ieee80211_rate2media(ic,
2162 vap->iv_bss->ni_txrate, mode);
2163 } else
2164 imr->ifm_active |= IFM_AUTO;
2165 if (imr->ifm_status & IFM_ACTIVE)
2166 imr->ifm_current = imr->ifm_active;
2167 }
2168
2169 /*
2170 * Set the current phy mode and recalculate the active channel
2171 * set based on the available channels for this mode. Also
2172 * select a new default/current channel if the current one is
2173 * inappropriate for this mode.
2174 */
2175 int
2176 ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode)
2177 {
2178 /*
2179 * Adjust basic rates in 11b/11g supported rate set.
2180 * Note that if operating on a hal/quarter rate channel
2181 * this is a noop as those rates sets are different
2182 * and used instead.
2183 */
2184 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B)
2185 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode);
2186
2187 ic->ic_curmode = mode;
2188 ieee80211_reset_erp(ic); /* reset ERP state */
2189
2190 return 0;
2191 }
2192
2193 /*
2194 * Return the phy mode for with the specified channel.
2195 */
2196 enum ieee80211_phymode
2197 ieee80211_chan2mode(const struct ieee80211_channel *chan)
2198 {
2199
2200 if (IEEE80211_IS_CHAN_VHT_2GHZ(chan))
2201 return IEEE80211_MODE_VHT_2GHZ;
2202 else if (IEEE80211_IS_CHAN_VHT_5GHZ(chan))
2203 return IEEE80211_MODE_VHT_5GHZ;
2204 else if (IEEE80211_IS_CHAN_HTA(chan))
2205 return IEEE80211_MODE_11NA;
2206 else if (IEEE80211_IS_CHAN_HTG(chan))
2207 return IEEE80211_MODE_11NG;
2208 else if (IEEE80211_IS_CHAN_108G(chan))
2209 return IEEE80211_MODE_TURBO_G;
2210 else if (IEEE80211_IS_CHAN_ST(chan))
2211 return IEEE80211_MODE_STURBO_A;
2212 else if (IEEE80211_IS_CHAN_TURBO(chan))
2213 return IEEE80211_MODE_TURBO_A;
2214 else if (IEEE80211_IS_CHAN_HALF(chan))
2215 return IEEE80211_MODE_HALF;
2216 else if (IEEE80211_IS_CHAN_QUARTER(chan))
2217 return IEEE80211_MODE_QUARTER;
2218 else if (IEEE80211_IS_CHAN_A(chan))
2219 return IEEE80211_MODE_11A;
2220 else if (IEEE80211_IS_CHAN_ANYG(chan))
2221 return IEEE80211_MODE_11G;
2222 else if (IEEE80211_IS_CHAN_B(chan))
2223 return IEEE80211_MODE_11B;
2224 else if (IEEE80211_IS_CHAN_FHSS(chan))
2225 return IEEE80211_MODE_FH;
2226
2227 /* NB: should not get here */
2228 printf("%s: cannot map channel to mode; freq %u flags 0x%x\n",
2229 __func__, chan->ic_freq, chan->ic_flags);
2230 return IEEE80211_MODE_11B;
2231 }
2232
2233 struct ratemedia {
2234 u_int match; /* rate + mode */
2235 u_int media; /* if_media rate */
2236 };
2237
2238 static int
2239 findmedia(const struct ratemedia rates[], int n, u_int match)
2240 {
2241 int i;
2242
2243 for (i = 0; i < n; i++)
2244 if (rates[i].match == match)
2245 return rates[i].media;
2246 return IFM_AUTO;
2247 }
2248
2249 /*
2250 * Convert IEEE80211 rate value to ifmedia subtype.
2251 * Rate is either a legacy rate in units of 0.5Mbps
2252 * or an MCS index.
2253 */
2254 int
2255 ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode)
2256 {
2257 static const struct ratemedia rates[] = {
2258 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 },
2259 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 },
2260 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 },
2261 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 },
2262 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 },
2263 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 },
2264 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 },
2265 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 },
2266 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 },
2267 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 },
2268 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 },
2269 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 },
2270 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 },
2271 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 },
2272 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 },
2273 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 },
2274 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 },
2275 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 },
2276 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 },
2277 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 },
2278 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 },
2279 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 },
2280 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 },
2281 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 },
2282 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 },
2283 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 },
2284 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 },
2285 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 },
2286 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 },
2287 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 },
2288 /* NB: OFDM72 doesn't really exist so we don't handle it */
2289 };
2290 static const struct ratemedia htrates[] = {
2291 { 0, IFM_IEEE80211_MCS },
2292 { 1, IFM_IEEE80211_MCS },
2293 { 2, IFM_IEEE80211_MCS },
2294 { 3, IFM_IEEE80211_MCS },
2295 { 4, IFM_IEEE80211_MCS },
2296 { 5, IFM_IEEE80211_MCS },
2297 { 6, IFM_IEEE80211_MCS },
2298 { 7, IFM_IEEE80211_MCS },
2299 { 8, IFM_IEEE80211_MCS },
2300 { 9, IFM_IEEE80211_MCS },
2301 { 10, IFM_IEEE80211_MCS },
2302 { 11, IFM_IEEE80211_MCS },
2303 { 12, IFM_IEEE80211_MCS },
2304 { 13, IFM_IEEE80211_MCS },
2305 { 14, IFM_IEEE80211_MCS },
2306 { 15, IFM_IEEE80211_MCS },
2307 { 16, IFM_IEEE80211_MCS },
2308 { 17, IFM_IEEE80211_MCS },
2309 { 18, IFM_IEEE80211_MCS },
2310 { 19, IFM_IEEE80211_MCS },
2311 { 20, IFM_IEEE80211_MCS },
2312 { 21, IFM_IEEE80211_MCS },
2313 { 22, IFM_IEEE80211_MCS },
2314 { 23, IFM_IEEE80211_MCS },
2315 { 24, IFM_IEEE80211_MCS },
2316 { 25, IFM_IEEE80211_MCS },
2317 { 26, IFM_IEEE80211_MCS },
2318 { 27, IFM_IEEE80211_MCS },
2319 { 28, IFM_IEEE80211_MCS },
2320 { 29, IFM_IEEE80211_MCS },
2321 { 30, IFM_IEEE80211_MCS },
2322 { 31, IFM_IEEE80211_MCS },
2323 { 32, IFM_IEEE80211_MCS },
2324 { 33, IFM_IEEE80211_MCS },
2325 { 34, IFM_IEEE80211_MCS },
2326 { 35, IFM_IEEE80211_MCS },
2327 { 36, IFM_IEEE80211_MCS },
2328 { 37, IFM_IEEE80211_MCS },
2329 { 38, IFM_IEEE80211_MCS },
2330 { 39, IFM_IEEE80211_MCS },
2331 { 40, IFM_IEEE80211_MCS },
2332 { 41, IFM_IEEE80211_MCS },
2333 { 42, IFM_IEEE80211_MCS },
2334 { 43, IFM_IEEE80211_MCS },
2335 { 44, IFM_IEEE80211_MCS },
2336 { 45, IFM_IEEE80211_MCS },
2337 { 46, IFM_IEEE80211_MCS },
2338 { 47, IFM_IEEE80211_MCS },
2339 { 48, IFM_IEEE80211_MCS },
2340 { 49, IFM_IEEE80211_MCS },
2341 { 50, IFM_IEEE80211_MCS },
2342 { 51, IFM_IEEE80211_MCS },
2343 { 52, IFM_IEEE80211_MCS },
2344 { 53, IFM_IEEE80211_MCS },
2345 { 54, IFM_IEEE80211_MCS },
2346 { 55, IFM_IEEE80211_MCS },
2347 { 56, IFM_IEEE80211_MCS },
2348 { 57, IFM_IEEE80211_MCS },
2349 { 58, IFM_IEEE80211_MCS },
2350 { 59, IFM_IEEE80211_MCS },
2351 { 60, IFM_IEEE80211_MCS },
2352 { 61, IFM_IEEE80211_MCS },
2353 { 62, IFM_IEEE80211_MCS },
2354 { 63, IFM_IEEE80211_MCS },
2355 { 64, IFM_IEEE80211_MCS },
2356 { 65, IFM_IEEE80211_MCS },
2357 { 66, IFM_IEEE80211_MCS },
2358 { 67, IFM_IEEE80211_MCS },
2359 { 68, IFM_IEEE80211_MCS },
2360 { 69, IFM_IEEE80211_MCS },
2361 { 70, IFM_IEEE80211_MCS },
2362 { 71, IFM_IEEE80211_MCS },
2363 { 72, IFM_IEEE80211_MCS },
2364 { 73, IFM_IEEE80211_MCS },
2365 { 74, IFM_IEEE80211_MCS },
2366 { 75, IFM_IEEE80211_MCS },
2367 { 76, IFM_IEEE80211_MCS },
2368 };
2369 int m;
2370
2371 /*
2372 * Check 11n rates first for match as an MCS.
2373 */
2374 if (mode == IEEE80211_MODE_11NA) {
2375 if (rate & IEEE80211_RATE_MCS) {
2376 rate &= ~IEEE80211_RATE_MCS;
2377 m = findmedia(htrates, nitems(htrates), rate);
2378 if (m != IFM_AUTO)
2379 return m | IFM_IEEE80211_11NA;
2380 }
2381 } else if (mode == IEEE80211_MODE_11NG) {
2382 /* NB: 12 is ambiguous, it will be treated as an MCS */
2383 if (rate & IEEE80211_RATE_MCS) {
2384 rate &= ~IEEE80211_RATE_MCS;
2385 m = findmedia(htrates, nitems(htrates), rate);
2386 if (m != IFM_AUTO)
2387 return m | IFM_IEEE80211_11NG;
2388 }
2389 }
2390 rate &= IEEE80211_RATE_VAL;
2391 switch (mode) {
2392 case IEEE80211_MODE_11A:
2393 case IEEE80211_MODE_HALF: /* XXX good 'nuf */
2394 case IEEE80211_MODE_QUARTER:
2395 case IEEE80211_MODE_11NA:
2396 case IEEE80211_MODE_TURBO_A:
2397 case IEEE80211_MODE_STURBO_A:
2398 return findmedia(rates, nitems(rates),
2399 rate | IFM_IEEE80211_11A);
2400 case IEEE80211_MODE_11B:
2401 return findmedia(rates, nitems(rates),
2402 rate | IFM_IEEE80211_11B);
2403 case IEEE80211_MODE_FH:
2404 return findmedia(rates, nitems(rates),
2405 rate | IFM_IEEE80211_FH);
2406 case IEEE80211_MODE_AUTO:
2407 /* NB: ic may be NULL for some drivers */
2408 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH)
2409 return findmedia(rates, nitems(rates),
2410 rate | IFM_IEEE80211_FH);
2411 /* NB: hack, 11g matches both 11b+11a rates */
2412 /* fall thru... */
2413 case IEEE80211_MODE_11G:
2414 case IEEE80211_MODE_11NG:
2415 case IEEE80211_MODE_TURBO_G:
2416 return findmedia(rates, nitems(rates), rate | IFM_IEEE80211_11G);
2417 case IEEE80211_MODE_VHT_2GHZ:
2418 case IEEE80211_MODE_VHT_5GHZ:
2419 /* XXX TODO: need to figure out mapping for VHT rates */
2420 return IFM_AUTO;
2421 }
2422 return IFM_AUTO;
2423 }
2424
2425 int
2426 ieee80211_media2rate(int mword)
2427 {
2428 static const int ieeerates[] = {
2429 -1, /* IFM_AUTO */
2430 0, /* IFM_MANUAL */
2431 0, /* IFM_NONE */
2432 2, /* IFM_IEEE80211_FH1 */
2433 4, /* IFM_IEEE80211_FH2 */
2434 2, /* IFM_IEEE80211_DS1 */
2435 4, /* IFM_IEEE80211_DS2 */
2436 11, /* IFM_IEEE80211_DS5 */
2437 22, /* IFM_IEEE80211_DS11 */
2438 44, /* IFM_IEEE80211_DS22 */
2439 12, /* IFM_IEEE80211_OFDM6 */
2440 18, /* IFM_IEEE80211_OFDM9 */
2441 24, /* IFM_IEEE80211_OFDM12 */
2442 36, /* IFM_IEEE80211_OFDM18 */
2443 48, /* IFM_IEEE80211_OFDM24 */
2444 72, /* IFM_IEEE80211_OFDM36 */
2445 96, /* IFM_IEEE80211_OFDM48 */
2446 108, /* IFM_IEEE80211_OFDM54 */
2447 144, /* IFM_IEEE80211_OFDM72 */
2448 0, /* IFM_IEEE80211_DS354k */
2449 0, /* IFM_IEEE80211_DS512k */
2450 6, /* IFM_IEEE80211_OFDM3 */
2451 9, /* IFM_IEEE80211_OFDM4 */
2452 54, /* IFM_IEEE80211_OFDM27 */
2453 -1, /* IFM_IEEE80211_MCS */
2454 -1, /* IFM_IEEE80211_VHT */
2455 };
2456 return IFM_SUBTYPE(mword) < nitems(ieeerates) ?
2457 ieeerates[IFM_SUBTYPE(mword)] : 0;
2458 }
2459
2460 /*
2461 * The following hash function is adapted from "Hash Functions" by Bob Jenkins
2462 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997).
2463 */
2464 #define mix(a, b, c) \
2465 do { \
2466 a -= b; a -= c; a ^= (c >> 13); \
2467 b -= c; b -= a; b ^= (a << 8); \
2468 c -= a; c -= b; c ^= (b >> 13); \
2469 a -= b; a -= c; a ^= (c >> 12); \
2470 b -= c; b -= a; b ^= (a << 16); \
2471 c -= a; c -= b; c ^= (b >> 5); \
2472 a -= b; a -= c; a ^= (c >> 3); \
2473 b -= c; b -= a; b ^= (a << 10); \
2474 c -= a; c -= b; c ^= (b >> 15); \
2475 } while (/*CONSTCOND*/0)
2476
2477 uint32_t
2478 ieee80211_mac_hash(const struct ieee80211com *ic,
2479 const uint8_t addr[IEEE80211_ADDR_LEN])
2480 {
2481 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key;
2482
2483 b += addr[5] << 8;
2484 b += addr[4];
2485 a += addr[3] << 24;
2486 a += addr[2] << 16;
2487 a += addr[1] << 8;
2488 a += addr[0];
2489
2490 mix(a, b, c);
2491
2492 return c;
2493 }
2494 #undef mix
2495
2496 char
2497 ieee80211_channel_type_char(const struct ieee80211_channel *c)
2498 {
2499 if (IEEE80211_IS_CHAN_ST(c))
2500 return 'S';
2501 if (IEEE80211_IS_CHAN_108A(c))
2502 return 'T';
2503 if (IEEE80211_IS_CHAN_108G(c))
2504 return 'G';
2505 if (IEEE80211_IS_CHAN_VHT(c))
2506 return 'v';
2507 if (IEEE80211_IS_CHAN_HT(c))
2508 return 'n';
2509 if (IEEE80211_IS_CHAN_A(c))
2510 return 'a';
2511 if (IEEE80211_IS_CHAN_ANYG(c))
2512 return 'g';
2513 if (IEEE80211_IS_CHAN_B(c))
2514 return 'b';
2515 return 'f';
2516 }
Cache object: 28bb6f1dafb07d2845f937358efe46f0
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