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("$FreeBSD$");
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_com_vdetach(vap);
410 ieee80211_vap_destroy(vap);
411 }
412 ieee80211_waitfor_parent(ic);
413
414 ieee80211_sysctl_detach(ic);
415 ieee80211_dfs_detach(ic);
416 ieee80211_regdomain_detach(ic);
417 ieee80211_scan_detach(ic);
418 #ifdef IEEE80211_SUPPORT_SUPERG
419 ieee80211_superg_detach(ic);
420 #endif
421 ieee80211_vht_detach(ic);
422 ieee80211_ht_detach(ic);
423 /* NB: must be called before ieee80211_node_detach */
424 ieee80211_proto_detach(ic);
425 ieee80211_crypto_detach(ic);
426 ieee80211_power_detach(ic);
427 ieee80211_node_detach(ic);
428
429 counter_u64_free(ic->ic_ierrors);
430 counter_u64_free(ic->ic_oerrors);
431
432 taskqueue_free(ic->ic_tq);
433 IEEE80211_TX_LOCK_DESTROY(ic);
434 IEEE80211_LOCK_DESTROY(ic);
435 }
436
437 struct ieee80211com *
438 ieee80211_find_com(const char *name)
439 {
440 struct ieee80211com *ic;
441
442 mtx_lock(&ic_list_mtx);
443 LIST_FOREACH(ic, &ic_head, ic_next)
444 if (strcmp(ic->ic_name, name) == 0)
445 break;
446 mtx_unlock(&ic_list_mtx);
447
448 return (ic);
449 }
450
451 void
452 ieee80211_iterate_coms(ieee80211_com_iter_func *f, void *arg)
453 {
454 struct ieee80211com *ic;
455
456 mtx_lock(&ic_list_mtx);
457 LIST_FOREACH(ic, &ic_head, ic_next)
458 (*f)(arg, ic);
459 mtx_unlock(&ic_list_mtx);
460 }
461
462 /*
463 * Default reset method for use with the ioctl support. This
464 * method is invoked after any state change in the 802.11
465 * layer that should be propagated to the hardware but not
466 * require re-initialization of the 802.11 state machine (e.g
467 * rescanning for an ap). We always return ENETRESET which
468 * should cause the driver to re-initialize the device. Drivers
469 * can override this method to implement more optimized support.
470 */
471 static int
472 default_reset(struct ieee80211vap *vap, u_long cmd)
473 {
474 return ENETRESET;
475 }
476
477 /*
478 * Default for updating the VAP default TX key index.
479 *
480 * Drivers that support TX offload as well as hardware encryption offload
481 * may need to be informed of key index changes separate from the key
482 * update.
483 */
484 static void
485 default_update_deftxkey(struct ieee80211vap *vap, ieee80211_keyix kid)
486 {
487
488 /* XXX assert validity */
489 /* XXX assert we're in a key update block */
490 vap->iv_def_txkey = kid;
491 }
492
493 /*
494 * Add underlying device errors to vap errors.
495 */
496 static uint64_t
497 ieee80211_get_counter(struct ifnet *ifp, ift_counter cnt)
498 {
499 struct ieee80211vap *vap = ifp->if_softc;
500 struct ieee80211com *ic = vap->iv_ic;
501 uint64_t rv;
502
503 rv = if_get_counter_default(ifp, cnt);
504 switch (cnt) {
505 case IFCOUNTER_OERRORS:
506 rv += counter_u64_fetch(ic->ic_oerrors);
507 break;
508 case IFCOUNTER_IERRORS:
509 rv += counter_u64_fetch(ic->ic_ierrors);
510 break;
511 default:
512 break;
513 }
514
515 return (rv);
516 }
517
518 /*
519 * Prepare a vap for use. Drivers use this call to
520 * setup net80211 state in new vap's prior attaching
521 * them with ieee80211_vap_attach (below).
522 */
523 int
524 ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap,
525 const char name[IFNAMSIZ], int unit, enum ieee80211_opmode opmode,
526 int flags, const uint8_t bssid[IEEE80211_ADDR_LEN])
527 {
528 struct ifnet *ifp;
529
530 ifp = if_alloc(IFT_ETHER);
531 if (ifp == NULL) {
532 ic_printf(ic, "%s: unable to allocate ifnet\n", __func__);
533 return ENOMEM;
534 }
535 if_initname(ifp, name, unit);
536 ifp->if_softc = vap; /* back pointer */
537 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
538 ifp->if_transmit = ieee80211_vap_transmit;
539 ifp->if_qflush = ieee80211_vap_qflush;
540 ifp->if_ioctl = ieee80211_ioctl;
541 ifp->if_init = ieee80211_init;
542 ifp->if_get_counter = ieee80211_get_counter;
543
544 vap->iv_ifp = ifp;
545 vap->iv_ic = ic;
546 vap->iv_flags = ic->ic_flags; /* propagate common flags */
547 vap->iv_flags_ext = ic->ic_flags_ext;
548 vap->iv_flags_ven = ic->ic_flags_ven;
549 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE;
550
551 /* 11n capabilities - XXX methodize */
552 vap->iv_htcaps = ic->ic_htcaps;
553 vap->iv_htextcaps = ic->ic_htextcaps;
554
555 /* 11ac capabilities - XXX methodize */
556 vap->iv_vhtcaps = ic->ic_vhtcaps;
557 vap->iv_vhtextcaps = ic->ic_vhtextcaps;
558
559 vap->iv_opmode = opmode;
560 vap->iv_caps |= ieee80211_opcap[opmode];
561 IEEE80211_ADDR_COPY(vap->iv_myaddr, ic->ic_macaddr);
562 switch (opmode) {
563 case IEEE80211_M_WDS:
564 /*
565 * WDS links must specify the bssid of the far end.
566 * For legacy operation this is a static relationship.
567 * For non-legacy operation the station must associate
568 * and be authorized to pass traffic. Plumbing the
569 * vap to the proper node happens when the vap
570 * transitions to RUN state.
571 */
572 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid);
573 vap->iv_flags |= IEEE80211_F_DESBSSID;
574 if (flags & IEEE80211_CLONE_WDSLEGACY)
575 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY;
576 break;
577 #ifdef IEEE80211_SUPPORT_TDMA
578 case IEEE80211_M_AHDEMO:
579 if (flags & IEEE80211_CLONE_TDMA) {
580 /* NB: checked before clone operation allowed */
581 KASSERT(ic->ic_caps & IEEE80211_C_TDMA,
582 ("not TDMA capable, ic_caps 0x%x", ic->ic_caps));
583 /*
584 * Propagate TDMA capability to mark vap; this
585 * cannot be removed and is used to distinguish
586 * regular ahdemo operation from ahdemo+tdma.
587 */
588 vap->iv_caps |= IEEE80211_C_TDMA;
589 }
590 break;
591 #endif
592 default:
593 break;
594 }
595 /* auto-enable s/w beacon miss support */
596 if (flags & IEEE80211_CLONE_NOBEACONS)
597 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS;
598 /* auto-generated or user supplied MAC address */
599 if (flags & (IEEE80211_CLONE_BSSID|IEEE80211_CLONE_MACADDR))
600 vap->iv_flags_ext |= IEEE80211_FEXT_UNIQMAC;
601 /*
602 * Enable various functionality by default if we're
603 * capable; the driver can override us if it knows better.
604 */
605 if (vap->iv_caps & IEEE80211_C_WME)
606 vap->iv_flags |= IEEE80211_F_WME;
607 if (vap->iv_caps & IEEE80211_C_BURST)
608 vap->iv_flags |= IEEE80211_F_BURST;
609 /* NB: bg scanning only makes sense for station mode right now */
610 if (vap->iv_opmode == IEEE80211_M_STA &&
611 (vap->iv_caps & IEEE80211_C_BGSCAN))
612 vap->iv_flags |= IEEE80211_F_BGSCAN;
613 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */
614 /* NB: DFS support only makes sense for ap mode right now */
615 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
616 (vap->iv_caps & IEEE80211_C_DFS))
617 vap->iv_flags_ext |= IEEE80211_FEXT_DFS;
618 /* NB: only flip on U-APSD for hostap/sta for now */
619 if ((vap->iv_opmode == IEEE80211_M_STA)
620 || (vap->iv_opmode == IEEE80211_M_HOSTAP)) {
621 if (vap->iv_caps & IEEE80211_C_UAPSD)
622 vap->iv_flags_ext |= IEEE80211_FEXT_UAPSD;
623 }
624
625 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */
626 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT;
627 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT;
628 /*
629 * Install a default reset method for the ioctl support;
630 * the driver can override this.
631 */
632 vap->iv_reset = default_reset;
633
634 /*
635 * Install a default crypto key update method, the driver
636 * can override this.
637 */
638 vap->iv_update_deftxkey = default_update_deftxkey;
639
640 ieee80211_sysctl_vattach(vap);
641 ieee80211_crypto_vattach(vap);
642 ieee80211_node_vattach(vap);
643 ieee80211_power_vattach(vap);
644 ieee80211_proto_vattach(vap);
645 #ifdef IEEE80211_SUPPORT_SUPERG
646 ieee80211_superg_vattach(vap);
647 #endif
648 ieee80211_ht_vattach(vap);
649 ieee80211_vht_vattach(vap);
650 ieee80211_scan_vattach(vap);
651 ieee80211_regdomain_vattach(vap);
652 ieee80211_radiotap_vattach(vap);
653 ieee80211_vap_reset_erp(vap);
654 ieee80211_ratectl_set(vap, IEEE80211_RATECTL_NONE);
655
656 return 0;
657 }
658
659 /*
660 * Activate a vap. State should have been prepared with a
661 * call to ieee80211_vap_setup and by the driver. On return
662 * from this call the vap is ready for use.
663 */
664 int
665 ieee80211_vap_attach(struct ieee80211vap *vap, ifm_change_cb_t media_change,
666 ifm_stat_cb_t media_stat, const uint8_t macaddr[IEEE80211_ADDR_LEN])
667 {
668 struct ifnet *ifp = vap->iv_ifp;
669 struct ieee80211com *ic = vap->iv_ic;
670 struct ifmediareq imr;
671 int maxrate;
672
673 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
674 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n",
675 __func__, ieee80211_opmode_name[vap->iv_opmode],
676 ic->ic_name, vap->iv_flags, vap->iv_flags_ext);
677
678 /*
679 * Do late attach work that cannot happen until after
680 * the driver has had a chance to override defaults.
681 */
682 ieee80211_node_latevattach(vap);
683 ieee80211_power_latevattach(vap);
684
685 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps,
686 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat);
687 ieee80211_media_status(ifp, &imr);
688 /* NB: strip explicit mode; we're actually in autoselect */
689 ifmedia_set(&vap->iv_media,
690 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO));
691 if (maxrate)
692 ifp->if_baudrate = IF_Mbps(maxrate);
693
694 ether_ifattach(ifp, macaddr);
695 IEEE80211_ADDR_COPY(vap->iv_myaddr, IF_LLADDR(ifp));
696 /* hook output method setup by ether_ifattach */
697 vap->iv_output = ifp->if_output;
698 ifp->if_output = ieee80211_output;
699 /* NB: if_mtu set by ether_ifattach to ETHERMTU */
700
701 IEEE80211_LOCK(ic);
702 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next);
703 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
704 #ifdef IEEE80211_SUPPORT_SUPERG
705 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
706 #endif
707 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
708 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
709 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
710 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
711
712 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_VHT);
713 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT40);
714 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT80);
715 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT160);
716 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT80P80);
717 IEEE80211_UNLOCK(ic);
718
719 return 1;
720 }
721
722 /*
723 * Tear down vap state and reclaim the ifnet.
724 * The driver is assumed to have prepared for
725 * this; e.g. by turning off interrupts for the
726 * underlying device.
727 */
728 void
729 ieee80211_vap_detach(struct ieee80211vap *vap)
730 {
731 struct ieee80211com *ic = vap->iv_ic;
732 struct ifnet *ifp = vap->iv_ifp;
733
734 CURVNET_SET(ifp->if_vnet);
735
736 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n",
737 __func__, ieee80211_opmode_name[vap->iv_opmode], ic->ic_name);
738
739 /* NB: bpfdetach is called by ether_ifdetach and claims all taps */
740 ether_ifdetach(ifp);
741
742 ieee80211_stop(vap);
743
744 /*
745 * Flush any deferred vap tasks.
746 */
747 ieee80211_draintask(ic, &vap->iv_nstate_task);
748 ieee80211_draintask(ic, &vap->iv_swbmiss_task);
749 ieee80211_draintask(ic, &vap->iv_wme_task);
750 ieee80211_draintask(ic, &ic->ic_parent_task);
751
752 /* XXX band-aid until ifnet handles this for us */
753 taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
754
755 IEEE80211_LOCK(ic);
756 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running"));
757 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next);
758 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
759 #ifdef IEEE80211_SUPPORT_SUPERG
760 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
761 #endif
762 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
763 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
764 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
765 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
766
767 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_VHT);
768 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT40);
769 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT80);
770 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT160);
771 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT80P80);
772
773 /* NB: this handles the bpfdetach done below */
774 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF);
775 if (vap->iv_ifflags & IFF_PROMISC)
776 ieee80211_promisc(vap, false);
777 if (vap->iv_ifflags & IFF_ALLMULTI)
778 ieee80211_allmulti(vap, false);
779 IEEE80211_UNLOCK(ic);
780
781 ifmedia_removeall(&vap->iv_media);
782
783 ieee80211_radiotap_vdetach(vap);
784 ieee80211_regdomain_vdetach(vap);
785 ieee80211_scan_vdetach(vap);
786 #ifdef IEEE80211_SUPPORT_SUPERG
787 ieee80211_superg_vdetach(vap);
788 #endif
789 ieee80211_vht_vdetach(vap);
790 ieee80211_ht_vdetach(vap);
791 /* NB: must be before ieee80211_node_vdetach */
792 ieee80211_proto_vdetach(vap);
793 ieee80211_crypto_vdetach(vap);
794 ieee80211_power_vdetach(vap);
795 ieee80211_node_vdetach(vap);
796 ieee80211_sysctl_vdetach(vap);
797
798 if_free(ifp);
799
800 CURVNET_RESTORE();
801 }
802
803 /*
804 * Count number of vaps in promisc, and issue promisc on
805 * parent respectively.
806 */
807 void
808 ieee80211_promisc(struct ieee80211vap *vap, bool on)
809 {
810 struct ieee80211com *ic = vap->iv_ic;
811
812 IEEE80211_LOCK_ASSERT(ic);
813
814 if (on) {
815 if (++ic->ic_promisc == 1)
816 ieee80211_runtask(ic, &ic->ic_promisc_task);
817 } else {
818 KASSERT(ic->ic_promisc > 0, ("%s: ic %p not promisc",
819 __func__, ic));
820 if (--ic->ic_promisc == 0)
821 ieee80211_runtask(ic, &ic->ic_promisc_task);
822 }
823 }
824
825 /*
826 * Count number of vaps in allmulti, and issue allmulti on
827 * parent respectively.
828 */
829 void
830 ieee80211_allmulti(struct ieee80211vap *vap, bool on)
831 {
832 struct ieee80211com *ic = vap->iv_ic;
833
834 IEEE80211_LOCK_ASSERT(ic);
835
836 if (on) {
837 if (++ic->ic_allmulti == 1)
838 ieee80211_runtask(ic, &ic->ic_mcast_task);
839 } else {
840 KASSERT(ic->ic_allmulti > 0, ("%s: ic %p not allmulti",
841 __func__, ic));
842 if (--ic->ic_allmulti == 0)
843 ieee80211_runtask(ic, &ic->ic_mcast_task);
844 }
845 }
846
847 /*
848 * Synchronize flag bit state in the com structure
849 * according to the state of all vap's. This is used,
850 * for example, to handle state changes via ioctls.
851 */
852 static void
853 ieee80211_syncflag_locked(struct ieee80211com *ic, int flag)
854 {
855 struct ieee80211vap *vap;
856 int bit;
857
858 IEEE80211_LOCK_ASSERT(ic);
859
860 bit = 0;
861 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
862 if (vap->iv_flags & flag) {
863 bit = 1;
864 break;
865 }
866 if (bit)
867 ic->ic_flags |= flag;
868 else
869 ic->ic_flags &= ~flag;
870 }
871
872 void
873 ieee80211_syncflag(struct ieee80211vap *vap, int flag)
874 {
875 struct ieee80211com *ic = vap->iv_ic;
876
877 IEEE80211_LOCK(ic);
878 if (flag < 0) {
879 flag = -flag;
880 vap->iv_flags &= ~flag;
881 } else
882 vap->iv_flags |= flag;
883 ieee80211_syncflag_locked(ic, flag);
884 IEEE80211_UNLOCK(ic);
885 }
886
887 /*
888 * Synchronize flags_ht bit state in the com structure
889 * according to the state of all vap's. This is used,
890 * for example, to handle state changes via ioctls.
891 */
892 static void
893 ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag)
894 {
895 struct ieee80211vap *vap;
896 int bit;
897
898 IEEE80211_LOCK_ASSERT(ic);
899
900 bit = 0;
901 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
902 if (vap->iv_flags_ht & flag) {
903 bit = 1;
904 break;
905 }
906 if (bit)
907 ic->ic_flags_ht |= flag;
908 else
909 ic->ic_flags_ht &= ~flag;
910 }
911
912 void
913 ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag)
914 {
915 struct ieee80211com *ic = vap->iv_ic;
916
917 IEEE80211_LOCK(ic);
918 if (flag < 0) {
919 flag = -flag;
920 vap->iv_flags_ht &= ~flag;
921 } else
922 vap->iv_flags_ht |= flag;
923 ieee80211_syncflag_ht_locked(ic, flag);
924 IEEE80211_UNLOCK(ic);
925 }
926
927 /*
928 * Synchronize flags_vht bit state in the com structure
929 * according to the state of all vap's. This is used,
930 * for example, to handle state changes via ioctls.
931 */
932 static void
933 ieee80211_syncflag_vht_locked(struct ieee80211com *ic, int flag)
934 {
935 struct ieee80211vap *vap;
936 int bit;
937
938 IEEE80211_LOCK_ASSERT(ic);
939
940 bit = 0;
941 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
942 if (vap->iv_flags_vht & flag) {
943 bit = 1;
944 break;
945 }
946 if (bit)
947 ic->ic_flags_vht |= flag;
948 else
949 ic->ic_flags_vht &= ~flag;
950 }
951
952 void
953 ieee80211_syncflag_vht(struct ieee80211vap *vap, int flag)
954 {
955 struct ieee80211com *ic = vap->iv_ic;
956
957 IEEE80211_LOCK(ic);
958 if (flag < 0) {
959 flag = -flag;
960 vap->iv_flags_vht &= ~flag;
961 } else
962 vap->iv_flags_vht |= flag;
963 ieee80211_syncflag_vht_locked(ic, flag);
964 IEEE80211_UNLOCK(ic);
965 }
966
967 /*
968 * Synchronize flags_ext bit state in the com structure
969 * according to the state of all vap's. This is used,
970 * for example, to handle state changes via ioctls.
971 */
972 static void
973 ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag)
974 {
975 struct ieee80211vap *vap;
976 int bit;
977
978 IEEE80211_LOCK_ASSERT(ic);
979
980 bit = 0;
981 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
982 if (vap->iv_flags_ext & flag) {
983 bit = 1;
984 break;
985 }
986 if (bit)
987 ic->ic_flags_ext |= flag;
988 else
989 ic->ic_flags_ext &= ~flag;
990 }
991
992 void
993 ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag)
994 {
995 struct ieee80211com *ic = vap->iv_ic;
996
997 IEEE80211_LOCK(ic);
998 if (flag < 0) {
999 flag = -flag;
1000 vap->iv_flags_ext &= ~flag;
1001 } else
1002 vap->iv_flags_ext |= flag;
1003 ieee80211_syncflag_ext_locked(ic, flag);
1004 IEEE80211_UNLOCK(ic);
1005 }
1006
1007 static __inline int
1008 mapgsm(u_int freq, u_int flags)
1009 {
1010 freq *= 10;
1011 if (flags & IEEE80211_CHAN_QUARTER)
1012 freq += 5;
1013 else if (flags & IEEE80211_CHAN_HALF)
1014 freq += 10;
1015 else
1016 freq += 20;
1017 /* NB: there is no 907/20 wide but leave room */
1018 return (freq - 906*10) / 5;
1019 }
1020
1021 static __inline int
1022 mappsb(u_int freq, u_int flags)
1023 {
1024 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5;
1025 }
1026
1027 /*
1028 * Convert MHz frequency to IEEE channel number.
1029 */
1030 int
1031 ieee80211_mhz2ieee(u_int freq, u_int flags)
1032 {
1033 #define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990)
1034 if (flags & IEEE80211_CHAN_GSM)
1035 return mapgsm(freq, flags);
1036 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
1037 if (freq == 2484)
1038 return 14;
1039 if (freq < 2484)
1040 return ((int) freq - 2407) / 5;
1041 else
1042 return 15 + ((freq - 2512) / 20);
1043 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */
1044 if (freq <= 5000) {
1045 /* XXX check regdomain? */
1046 if (IS_FREQ_IN_PSB(freq))
1047 return mappsb(freq, flags);
1048 return (freq - 4000) / 5;
1049 } else
1050 return (freq - 5000) / 5;
1051 } else { /* either, guess */
1052 if (freq == 2484)
1053 return 14;
1054 if (freq < 2484) {
1055 if (907 <= freq && freq <= 922)
1056 return mapgsm(freq, flags);
1057 return ((int) freq - 2407) / 5;
1058 }
1059 if (freq < 5000) {
1060 if (IS_FREQ_IN_PSB(freq))
1061 return mappsb(freq, flags);
1062 else if (freq > 4900)
1063 return (freq - 4000) / 5;
1064 else
1065 return 15 + ((freq - 2512) / 20);
1066 }
1067 return (freq - 5000) / 5;
1068 }
1069 #undef IS_FREQ_IN_PSB
1070 }
1071
1072 /*
1073 * Convert channel to IEEE channel number.
1074 */
1075 int
1076 ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c)
1077 {
1078 if (c == NULL) {
1079 ic_printf(ic, "invalid channel (NULL)\n");
1080 return 0; /* XXX */
1081 }
1082 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee);
1083 }
1084
1085 /*
1086 * Convert IEEE channel number to MHz frequency.
1087 */
1088 u_int
1089 ieee80211_ieee2mhz(u_int chan, u_int flags)
1090 {
1091 if (flags & IEEE80211_CHAN_GSM)
1092 return 907 + 5 * (chan / 10);
1093 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
1094 if (chan == 14)
1095 return 2484;
1096 if (chan < 14)
1097 return 2407 + chan*5;
1098 else
1099 return 2512 + ((chan-15)*20);
1100 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */
1101 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) {
1102 chan -= 37;
1103 return 4940 + chan*5 + (chan % 5 ? 2 : 0);
1104 }
1105 return 5000 + (chan*5);
1106 } else { /* either, guess */
1107 /* XXX can't distinguish PSB+GSM channels */
1108 if (chan == 14)
1109 return 2484;
1110 if (chan < 14) /* 0-13 */
1111 return 2407 + chan*5;
1112 if (chan < 27) /* 15-26 */
1113 return 2512 + ((chan-15)*20);
1114 return 5000 + (chan*5);
1115 }
1116 }
1117
1118 static __inline void
1119 set_extchan(struct ieee80211_channel *c)
1120 {
1121
1122 /*
1123 * IEEE Std 802.11-2012, page 1738, subclause 20.3.15.4:
1124 * "the secondary channel number shall be 'N + [1,-1] * 4'
1125 */
1126 if (c->ic_flags & IEEE80211_CHAN_HT40U)
1127 c->ic_extieee = c->ic_ieee + 4;
1128 else if (c->ic_flags & IEEE80211_CHAN_HT40D)
1129 c->ic_extieee = c->ic_ieee - 4;
1130 else
1131 c->ic_extieee = 0;
1132 }
1133
1134 /*
1135 * Populate the freq1/freq2 fields as appropriate for VHT channels.
1136 *
1137 * This for now uses a hard-coded list of 80MHz wide channels.
1138 *
1139 * For HT20/HT40, freq1 just is the centre frequency of the 40MHz
1140 * wide channel we've already decided upon.
1141 *
1142 * For VHT80 and VHT160, there are only a small number of fixed
1143 * 80/160MHz wide channels, so we just use those.
1144 *
1145 * This is all likely very very wrong - both the regulatory code
1146 * and this code needs to ensure that all four channels are
1147 * available and valid before the VHT80 (and eight for VHT160) channel
1148 * is created.
1149 */
1150
1151 struct vht_chan_range {
1152 uint16_t freq_start;
1153 uint16_t freq_end;
1154 };
1155
1156 struct vht_chan_range vht80_chan_ranges[] = {
1157 { 5170, 5250 },
1158 { 5250, 5330 },
1159 { 5490, 5570 },
1160 { 5570, 5650 },
1161 { 5650, 5730 },
1162 { 5735, 5815 },
1163 { 0, 0 }
1164 };
1165
1166 struct vht_chan_range vht160_chan_ranges[] = {
1167 { 5170, 5330 },
1168 { 5490, 5650 },
1169 { 0, 0 }
1170 };
1171
1172 static int
1173 set_vht_extchan(struct ieee80211_channel *c)
1174 {
1175 int i;
1176
1177 if (! IEEE80211_IS_CHAN_VHT(c))
1178 return (0);
1179
1180 if (IEEE80211_IS_CHAN_VHT80P80(c)) {
1181 printf("%s: TODO VHT80+80 channel (ieee=%d, flags=0x%08x)\n",
1182 __func__, c->ic_ieee, c->ic_flags);
1183 }
1184
1185 if (IEEE80211_IS_CHAN_VHT160(c)) {
1186 for (i = 0; vht160_chan_ranges[i].freq_start != 0; i++) {
1187 if (c->ic_freq >= vht160_chan_ranges[i].freq_start &&
1188 c->ic_freq < vht160_chan_ranges[i].freq_end) {
1189 int midpoint;
1190
1191 midpoint = vht160_chan_ranges[i].freq_start + 80;
1192 c->ic_vht_ch_freq1 =
1193 ieee80211_mhz2ieee(midpoint, c->ic_flags);
1194 c->ic_vht_ch_freq2 = 0;
1195 #if 0
1196 printf("%s: %d, freq=%d, midpoint=%d, freq1=%d, freq2=%d\n",
1197 __func__, c->ic_ieee, c->ic_freq, midpoint,
1198 c->ic_vht_ch_freq1, c->ic_vht_ch_freq2);
1199 #endif
1200 return (1);
1201 }
1202 }
1203 return (0);
1204 }
1205
1206 if (IEEE80211_IS_CHAN_VHT80(c)) {
1207 for (i = 0; vht80_chan_ranges[i].freq_start != 0; i++) {
1208 if (c->ic_freq >= vht80_chan_ranges[i].freq_start &&
1209 c->ic_freq < vht80_chan_ranges[i].freq_end) {
1210 int midpoint;
1211
1212 midpoint = vht80_chan_ranges[i].freq_start + 40;
1213 c->ic_vht_ch_freq1 =
1214 ieee80211_mhz2ieee(midpoint, c->ic_flags);
1215 c->ic_vht_ch_freq2 = 0;
1216 #if 0
1217 printf("%s: %d, freq=%d, midpoint=%d, freq1=%d, freq2=%d\n",
1218 __func__, c->ic_ieee, c->ic_freq, midpoint,
1219 c->ic_vht_ch_freq1, c->ic_vht_ch_freq2);
1220 #endif
1221 return (1);
1222 }
1223 }
1224 return (0);
1225 }
1226
1227 if (IEEE80211_IS_CHAN_VHT40(c)) {
1228 if (IEEE80211_IS_CHAN_HT40U(c))
1229 c->ic_vht_ch_freq1 = c->ic_ieee + 2;
1230 else if (IEEE80211_IS_CHAN_HT40D(c))
1231 c->ic_vht_ch_freq1 = c->ic_ieee - 2;
1232 else
1233 return (0);
1234 return (1);
1235 }
1236
1237 if (IEEE80211_IS_CHAN_VHT20(c)) {
1238 c->ic_vht_ch_freq1 = c->ic_ieee;
1239 return (1);
1240 }
1241
1242 printf("%s: unknown VHT channel type (ieee=%d, flags=0x%08x)\n",
1243 __func__, c->ic_ieee, c->ic_flags);
1244
1245 return (0);
1246 }
1247
1248 /*
1249 * Return whether the current channel could possibly be a part of
1250 * a VHT80/VHT160 channel.
1251 *
1252 * This doesn't check that the whole range is in the allowed list
1253 * according to regulatory.
1254 */
1255 static bool
1256 is_vht160_valid_freq(uint16_t freq)
1257 {
1258 int i;
1259
1260 for (i = 0; vht160_chan_ranges[i].freq_start != 0; i++) {
1261 if (freq >= vht160_chan_ranges[i].freq_start &&
1262 freq < vht160_chan_ranges[i].freq_end)
1263 return (true);
1264 }
1265 return (false);
1266 }
1267
1268 static int
1269 is_vht80_valid_freq(uint16_t freq)
1270 {
1271 int i;
1272 for (i = 0; vht80_chan_ranges[i].freq_start != 0; i++) {
1273 if (freq >= vht80_chan_ranges[i].freq_start &&
1274 freq < vht80_chan_ranges[i].freq_end)
1275 return (1);
1276 }
1277 return (0);
1278 }
1279
1280 static int
1281 addchan(struct ieee80211_channel chans[], int maxchans, int *nchans,
1282 uint8_t ieee, uint16_t freq, int8_t maxregpower, uint32_t flags)
1283 {
1284 struct ieee80211_channel *c;
1285
1286 if (*nchans >= maxchans)
1287 return (ENOBUFS);
1288
1289 #if 0
1290 printf("%s: %d: ieee=%d, freq=%d, flags=0x%08x\n",
1291 __func__, *nchans, ieee, freq, flags);
1292 #endif
1293
1294 c = &chans[(*nchans)++];
1295 c->ic_ieee = ieee;
1296 c->ic_freq = freq != 0 ? freq : ieee80211_ieee2mhz(ieee, flags);
1297 c->ic_maxregpower = maxregpower;
1298 c->ic_maxpower = 2 * maxregpower;
1299 c->ic_flags = flags;
1300 c->ic_vht_ch_freq1 = 0;
1301 c->ic_vht_ch_freq2 = 0;
1302 set_extchan(c);
1303 set_vht_extchan(c);
1304
1305 return (0);
1306 }
1307
1308 static int
1309 copychan_prev(struct ieee80211_channel chans[], int maxchans, int *nchans,
1310 uint32_t flags)
1311 {
1312 struct ieee80211_channel *c;
1313
1314 KASSERT(*nchans > 0, ("channel list is empty\n"));
1315
1316 if (*nchans >= maxchans)
1317 return (ENOBUFS);
1318
1319 #if 0
1320 printf("%s: %d: flags=0x%08x\n",
1321 __func__, *nchans, flags);
1322 #endif
1323
1324 c = &chans[(*nchans)++];
1325 c[0] = c[-1];
1326 c->ic_flags = flags;
1327 c->ic_vht_ch_freq1 = 0;
1328 c->ic_vht_ch_freq2 = 0;
1329 set_extchan(c);
1330 set_vht_extchan(c);
1331
1332 return (0);
1333 }
1334
1335 /*
1336 * XXX VHT-2GHz
1337 */
1338 static void
1339 getflags_2ghz(const uint8_t bands[], uint32_t flags[], int cbw_flags)
1340 {
1341 int nmodes;
1342
1343 nmodes = 0;
1344 if (isset(bands, IEEE80211_MODE_11B))
1345 flags[nmodes++] = IEEE80211_CHAN_B;
1346 if (isset(bands, IEEE80211_MODE_11G))
1347 flags[nmodes++] = IEEE80211_CHAN_G;
1348 if (isset(bands, IEEE80211_MODE_11NG))
1349 flags[nmodes++] = IEEE80211_CHAN_G | IEEE80211_CHAN_HT20;
1350 if (cbw_flags & NET80211_CBW_FLAG_HT40) {
1351 flags[nmodes++] = IEEE80211_CHAN_G | IEEE80211_CHAN_HT40U;
1352 flags[nmodes++] = IEEE80211_CHAN_G | IEEE80211_CHAN_HT40D;
1353 }
1354 flags[nmodes] = 0;
1355 }
1356
1357 static void
1358 getflags_5ghz(const uint8_t bands[], uint32_t flags[], int cbw_flags)
1359 {
1360 int nmodes;
1361
1362 /*
1363 * The addchan_list() function seems to expect the flags array to
1364 * be in channel width order, so the VHT bits are interspersed
1365 * as appropriate to maintain said order.
1366 *
1367 * It also assumes HT40U is before HT40D.
1368 */
1369 nmodes = 0;
1370
1371 /* 20MHz */
1372 if (isset(bands, IEEE80211_MODE_11A))
1373 flags[nmodes++] = IEEE80211_CHAN_A;
1374 if (isset(bands, IEEE80211_MODE_11NA))
1375 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT20;
1376 if (isset(bands, IEEE80211_MODE_VHT_5GHZ)) {
1377 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT20 |
1378 IEEE80211_CHAN_VHT20;
1379 }
1380
1381 /* 40MHz */
1382 if (cbw_flags & NET80211_CBW_FLAG_HT40)
1383 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40U;
1384 if ((cbw_flags & NET80211_CBW_FLAG_HT40) &&
1385 isset(bands, IEEE80211_MODE_VHT_5GHZ))
1386 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40U |
1387 IEEE80211_CHAN_VHT40U;
1388 if (cbw_flags & NET80211_CBW_FLAG_HT40)
1389 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40D;
1390 if ((cbw_flags & NET80211_CBW_FLAG_HT40) &&
1391 isset(bands, IEEE80211_MODE_VHT_5GHZ))
1392 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40D |
1393 IEEE80211_CHAN_VHT40D;
1394
1395 /* 80MHz */
1396 if ((cbw_flags & NET80211_CBW_FLAG_VHT80) &&
1397 isset(bands, IEEE80211_MODE_VHT_5GHZ)) {
1398 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40U |
1399 IEEE80211_CHAN_VHT80;
1400 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40D |
1401 IEEE80211_CHAN_VHT80;
1402 }
1403
1404 /* VHT160 */
1405 if ((cbw_flags & NET80211_CBW_FLAG_VHT160) &&
1406 isset(bands, IEEE80211_MODE_VHT_5GHZ)) {
1407 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40U |
1408 IEEE80211_CHAN_VHT160;
1409 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40D |
1410 IEEE80211_CHAN_VHT160;
1411 }
1412
1413 /* VHT80+80 */
1414 if ((cbw_flags & NET80211_CBW_FLAG_VHT80P80) &&
1415 isset(bands, IEEE80211_MODE_VHT_5GHZ)) {
1416 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40U |
1417 IEEE80211_CHAN_VHT80P80;
1418 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40D |
1419 IEEE80211_CHAN_VHT80P80;
1420 }
1421
1422 flags[nmodes] = 0;
1423 }
1424
1425 static void
1426 getflags(const uint8_t bands[], uint32_t flags[], int cbw_flags)
1427 {
1428
1429 flags[0] = 0;
1430 if (isset(bands, IEEE80211_MODE_11A) ||
1431 isset(bands, IEEE80211_MODE_11NA) ||
1432 isset(bands, IEEE80211_MODE_VHT_5GHZ)) {
1433 if (isset(bands, IEEE80211_MODE_11B) ||
1434 isset(bands, IEEE80211_MODE_11G) ||
1435 isset(bands, IEEE80211_MODE_11NG) ||
1436 isset(bands, IEEE80211_MODE_VHT_2GHZ))
1437 return;
1438
1439 getflags_5ghz(bands, flags, cbw_flags);
1440 } else
1441 getflags_2ghz(bands, flags, cbw_flags);
1442 }
1443
1444 /*
1445 * Add one 20 MHz channel into specified channel list.
1446 * You MUST NOT mix bands when calling this. It will not add 5ghz
1447 * channels if you have any B/G/N band bit set.
1448 * The _cbw() variant does also support HT40/VHT80/160/80+80.
1449 */
1450 int
1451 ieee80211_add_channel_cbw(struct ieee80211_channel chans[], int maxchans,
1452 int *nchans, uint8_t ieee, uint16_t freq, int8_t maxregpower,
1453 uint32_t chan_flags, const uint8_t bands[], int cbw_flags)
1454 {
1455 uint32_t flags[IEEE80211_MODE_MAX];
1456 int i, error;
1457
1458 getflags(bands, flags, cbw_flags);
1459 KASSERT(flags[0] != 0, ("%s: no correct mode provided\n", __func__));
1460
1461 error = addchan(chans, maxchans, nchans, ieee, freq, maxregpower,
1462 flags[0] | chan_flags);
1463 for (i = 1; flags[i] != 0 && error == 0; i++) {
1464 error = copychan_prev(chans, maxchans, nchans,
1465 flags[i] | chan_flags);
1466 }
1467
1468 return (error);
1469 }
1470
1471 int
1472 ieee80211_add_channel(struct ieee80211_channel chans[], int maxchans,
1473 int *nchans, uint8_t ieee, uint16_t freq, int8_t maxregpower,
1474 uint32_t chan_flags, const uint8_t bands[])
1475 {
1476
1477 return (ieee80211_add_channel_cbw(chans, maxchans, nchans, ieee, freq,
1478 maxregpower, chan_flags, bands, 0));
1479 }
1480
1481 static struct ieee80211_channel *
1482 findchannel(struct ieee80211_channel chans[], int nchans, uint16_t freq,
1483 uint32_t flags)
1484 {
1485 struct ieee80211_channel *c;
1486 int i;
1487
1488 flags &= IEEE80211_CHAN_ALLTURBO;
1489 /* brute force search */
1490 for (i = 0; i < nchans; i++) {
1491 c = &chans[i];
1492 if (c->ic_freq == freq &&
1493 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
1494 return c;
1495 }
1496 return NULL;
1497 }
1498
1499 /*
1500 * Add 40 MHz channel pair into specified channel list.
1501 */
1502 /* XXX VHT */
1503 int
1504 ieee80211_add_channel_ht40(struct ieee80211_channel chans[], int maxchans,
1505 int *nchans, uint8_t ieee, int8_t maxregpower, uint32_t flags)
1506 {
1507 struct ieee80211_channel *cent, *extc;
1508 uint16_t freq;
1509 int error;
1510
1511 freq = ieee80211_ieee2mhz(ieee, flags);
1512
1513 /*
1514 * Each entry defines an HT40 channel pair; find the
1515 * center channel, then the extension channel above.
1516 */
1517 flags |= IEEE80211_CHAN_HT20;
1518 cent = findchannel(chans, *nchans, freq, flags);
1519 if (cent == NULL)
1520 return (EINVAL);
1521
1522 extc = findchannel(chans, *nchans, freq + 20, flags);
1523 if (extc == NULL)
1524 return (ENOENT);
1525
1526 flags &= ~IEEE80211_CHAN_HT;
1527 error = addchan(chans, maxchans, nchans, cent->ic_ieee, cent->ic_freq,
1528 maxregpower, flags | IEEE80211_CHAN_HT40U);
1529 if (error != 0)
1530 return (error);
1531
1532 error = addchan(chans, maxchans, nchans, extc->ic_ieee, extc->ic_freq,
1533 maxregpower, flags | IEEE80211_CHAN_HT40D);
1534
1535 return (error);
1536 }
1537
1538 /*
1539 * Fetch the center frequency for the primary channel.
1540 */
1541 uint32_t
1542 ieee80211_get_channel_center_freq(const struct ieee80211_channel *c)
1543 {
1544
1545 return (c->ic_freq);
1546 }
1547
1548 /*
1549 * Fetch the center frequency for the primary BAND channel.
1550 *
1551 * For 5, 10, 20MHz channels it'll be the normally configured channel
1552 * frequency.
1553 *
1554 * For 40MHz, 80MHz, 160Mhz channels it'll the the centre of the
1555 * wide channel, not the centre of the primary channel (that's ic_freq).
1556 *
1557 * For 80+80MHz channels this will be the centre of the primary
1558 * 80MHz channel; the secondary 80MHz channel will be center_freq2().
1559 */
1560 uint32_t
1561 ieee80211_get_channel_center_freq1(const struct ieee80211_channel *c)
1562 {
1563
1564 /*
1565 * VHT - use the pre-calculated centre frequency
1566 * of the given channel.
1567 */
1568 if (IEEE80211_IS_CHAN_VHT(c))
1569 return (ieee80211_ieee2mhz(c->ic_vht_ch_freq1, c->ic_flags));
1570
1571 if (IEEE80211_IS_CHAN_HT40U(c)) {
1572 return (c->ic_freq + 10);
1573 }
1574 if (IEEE80211_IS_CHAN_HT40D(c)) {
1575 return (c->ic_freq - 10);
1576 }
1577
1578 return (c->ic_freq);
1579 }
1580
1581 /*
1582 * For now, no 80+80 support; it will likely always return 0.
1583 */
1584 uint32_t
1585 ieee80211_get_channel_center_freq2(const struct ieee80211_channel *c)
1586 {
1587
1588 if (IEEE80211_IS_CHAN_VHT(c) && (c->ic_vht_ch_freq2 != 0))
1589 return (ieee80211_ieee2mhz(c->ic_vht_ch_freq2, c->ic_flags));
1590
1591 return (0);
1592 }
1593
1594 /*
1595 * Adds channels into specified channel list (ieee[] array must be sorted).
1596 * Channels are already sorted.
1597 */
1598 static int
1599 add_chanlist(struct ieee80211_channel chans[], int maxchans, int *nchans,
1600 const uint8_t ieee[], int nieee, uint32_t flags[])
1601 {
1602 uint16_t freq;
1603 int i, j, error;
1604 int is_vht;
1605
1606 for (i = 0; i < nieee; i++) {
1607 freq = ieee80211_ieee2mhz(ieee[i], flags[0]);
1608 for (j = 0; flags[j] != 0; j++) {
1609 /*
1610 * Notes:
1611 * + HT40 and VHT40 channels occur together, so
1612 * we need to be careful that we actually allow that.
1613 * + VHT80, VHT160 will coexist with HT40/VHT40, so
1614 * make sure it's not skipped because of the overlap
1615 * check used for (V)HT40.
1616 */
1617 is_vht = !! (flags[j] & IEEE80211_CHAN_VHT);
1618
1619 /* XXX TODO FIXME VHT80P80. */
1620
1621 /* Test for VHT160 analogue to the VHT80 below. */
1622 if (is_vht && flags[j] & IEEE80211_CHAN_VHT160)
1623 if (! is_vht160_valid_freq(freq))
1624 continue;
1625
1626 /*
1627 * Test for VHT80.
1628 * XXX This is all very broken right now.
1629 * What we /should/ do is:
1630 *
1631 * + check that the frequency is in the list of
1632 * allowed VHT80 ranges; and
1633 * + the other 3 channels in the list are actually
1634 * also available.
1635 */
1636 if (is_vht && flags[j] & IEEE80211_CHAN_VHT80)
1637 if (! is_vht80_valid_freq(freq))
1638 continue;
1639
1640 /*
1641 * Test for (V)HT40.
1642 *
1643 * This is also a fall through from VHT80; as we only
1644 * allow a VHT80 channel if the VHT40 combination is
1645 * also valid. If the VHT40 form is not valid then
1646 * we certainly can't do VHT80..
1647 */
1648 if (flags[j] & IEEE80211_CHAN_HT40D)
1649 /*
1650 * Can't have a "lower" channel if we are the
1651 * first channel.
1652 *
1653 * Can't have a "lower" channel if it's below/
1654 * within 20MHz of the first channel.
1655 *
1656 * Can't have a "lower" channel if the channel
1657 * below it is not 20MHz away.
1658 */
1659 if (i == 0 || ieee[i] < ieee[0] + 4 ||
1660 freq - 20 !=
1661 ieee80211_ieee2mhz(ieee[i] - 4, flags[j]))
1662 continue;
1663 if (flags[j] & IEEE80211_CHAN_HT40U)
1664 /*
1665 * Can't have an "upper" channel if we are
1666 * the last channel.
1667 *
1668 * Can't have an "upper" channel be above the
1669 * last channel in the list.
1670 *
1671 * Can't have an "upper" channel if the next
1672 * channel according to the math isn't 20MHz
1673 * away. (Likely for channel 13/14.)
1674 */
1675 if (i == nieee - 1 ||
1676 ieee[i] + 4 > ieee[nieee - 1] ||
1677 freq + 20 !=
1678 ieee80211_ieee2mhz(ieee[i] + 4, flags[j]))
1679 continue;
1680
1681 if (j == 0) {
1682 error = addchan(chans, maxchans, nchans,
1683 ieee[i], freq, 0, flags[j]);
1684 } else {
1685 error = copychan_prev(chans, maxchans, nchans,
1686 flags[j]);
1687 }
1688 if (error != 0)
1689 return (error);
1690 }
1691 }
1692
1693 return (0);
1694 }
1695
1696 int
1697 ieee80211_add_channel_list_2ghz(struct ieee80211_channel chans[], int maxchans,
1698 int *nchans, const uint8_t ieee[], int nieee, const uint8_t bands[],
1699 int cbw_flags)
1700 {
1701 uint32_t flags[IEEE80211_MODE_MAX];
1702
1703 /* XXX no VHT for now */
1704 getflags_2ghz(bands, flags, cbw_flags);
1705 KASSERT(flags[0] != 0, ("%s: no correct mode provided\n", __func__));
1706
1707 return (add_chanlist(chans, maxchans, nchans, ieee, nieee, flags));
1708 }
1709
1710 int
1711 ieee80211_add_channels_default_2ghz(struct ieee80211_channel chans[],
1712 int maxchans, int *nchans, const uint8_t bands[], int cbw_flags)
1713 {
1714 const uint8_t default_chan_list[] =
1715 { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 };
1716
1717 return (ieee80211_add_channel_list_2ghz(chans, maxchans, nchans,
1718 default_chan_list, nitems(default_chan_list), bands, cbw_flags));
1719 }
1720
1721 int
1722 ieee80211_add_channel_list_5ghz(struct ieee80211_channel chans[], int maxchans,
1723 int *nchans, const uint8_t ieee[], int nieee, const uint8_t bands[],
1724 int cbw_flags)
1725 {
1726 /*
1727 * XXX-BZ with HT and VHT there is no 1:1 mapping anymore. Review all
1728 * uses of IEEE80211_MODE_MAX and add a new #define name for array size.
1729 */
1730 uint32_t flags[2 * IEEE80211_MODE_MAX];
1731
1732 getflags_5ghz(bands, flags, cbw_flags);
1733 KASSERT(flags[0] != 0, ("%s: no correct mode provided\n", __func__));
1734
1735 return (add_chanlist(chans, maxchans, nchans, ieee, nieee, flags));
1736 }
1737
1738 /*
1739 * Locate a channel given a frequency+flags. We cache
1740 * the previous lookup to optimize switching between two
1741 * channels--as happens with dynamic turbo.
1742 */
1743 struct ieee80211_channel *
1744 ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags)
1745 {
1746 struct ieee80211_channel *c;
1747
1748 flags &= IEEE80211_CHAN_ALLTURBO;
1749 c = ic->ic_prevchan;
1750 if (c != NULL && c->ic_freq == freq &&
1751 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
1752 return c;
1753 /* brute force search */
1754 return (findchannel(ic->ic_channels, ic->ic_nchans, freq, flags));
1755 }
1756
1757 /*
1758 * Locate a channel given a channel number+flags. We cache
1759 * the previous lookup to optimize switching between two
1760 * channels--as happens with dynamic turbo.
1761 */
1762 struct ieee80211_channel *
1763 ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags)
1764 {
1765 struct ieee80211_channel *c;
1766 int i;
1767
1768 flags &= IEEE80211_CHAN_ALLTURBO;
1769 c = ic->ic_prevchan;
1770 if (c != NULL && c->ic_ieee == ieee &&
1771 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
1772 return c;
1773 /* brute force search */
1774 for (i = 0; i < ic->ic_nchans; i++) {
1775 c = &ic->ic_channels[i];
1776 if (c->ic_ieee == ieee &&
1777 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
1778 return c;
1779 }
1780 return NULL;
1781 }
1782
1783 /*
1784 * Lookup a channel suitable for the given rx status.
1785 *
1786 * This is used to find a channel for a frame (eg beacon, probe
1787 * response) based purely on the received PHY information.
1788 *
1789 * For now it tries to do it based on R_FREQ / R_IEEE.
1790 * This is enough for 11bg and 11a (and thus 11ng/11na)
1791 * but it will not be enough for GSM, PSB channels and the
1792 * like. It also doesn't know about legacy-turbog and
1793 * legacy-turbo modes, which some offload NICs actually
1794 * support in weird ways.
1795 *
1796 * Takes the ic and rxstatus; returns the channel or NULL
1797 * if not found.
1798 *
1799 * XXX TODO: Add support for that when the need arises.
1800 */
1801 struct ieee80211_channel *
1802 ieee80211_lookup_channel_rxstatus(struct ieee80211vap *vap,
1803 const struct ieee80211_rx_stats *rxs)
1804 {
1805 struct ieee80211com *ic = vap->iv_ic;
1806 uint32_t flags;
1807 struct ieee80211_channel *c;
1808
1809 if (rxs == NULL)
1810 return (NULL);
1811
1812 /*
1813 * Strictly speaking we only use freq for now,
1814 * however later on we may wish to just store
1815 * the ieee for verification.
1816 */
1817 if ((rxs->r_flags & IEEE80211_R_FREQ) == 0)
1818 return (NULL);
1819 if ((rxs->r_flags & IEEE80211_R_IEEE) == 0)
1820 return (NULL);
1821 if ((rxs->r_flags & IEEE80211_R_BAND) == 0)
1822 return (NULL);
1823
1824 /*
1825 * If the rx status contains a valid ieee/freq, then
1826 * ensure we populate the correct channel information
1827 * in rxchan before passing it up to the scan infrastructure.
1828 * Offload NICs will pass up beacons from all channels
1829 * during background scans.
1830 */
1831
1832 /* Determine a band */
1833 switch (rxs->c_band) {
1834 case IEEE80211_CHAN_2GHZ:
1835 flags = IEEE80211_CHAN_G;
1836 break;
1837 case IEEE80211_CHAN_5GHZ:
1838 flags = IEEE80211_CHAN_A;
1839 break;
1840 default:
1841 if (rxs->c_freq < 3000) {
1842 flags = IEEE80211_CHAN_G;
1843 } else {
1844 flags = IEEE80211_CHAN_A;
1845 }
1846 break;
1847 }
1848
1849 /* Channel lookup */
1850 c = ieee80211_find_channel(ic, rxs->c_freq, flags);
1851
1852 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INPUT,
1853 "%s: freq=%d, ieee=%d, flags=0x%08x; c=%p\n",
1854 __func__, (int) rxs->c_freq, (int) rxs->c_ieee, flags, c);
1855
1856 return (c);
1857 }
1858
1859 static void
1860 addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword)
1861 {
1862 #define ADD(_ic, _s, _o) \
1863 ifmedia_add(media, \
1864 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL)
1865 static const u_int mopts[IEEE80211_MODE_MAX] = {
1866 [IEEE80211_MODE_AUTO] = IFM_AUTO,
1867 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A,
1868 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B,
1869 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G,
1870 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH,
1871 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
1872 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO,
1873 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
1874 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */
1875 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */
1876 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA,
1877 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG,
1878 [IEEE80211_MODE_VHT_2GHZ] = IFM_IEEE80211_VHT2G,
1879 [IEEE80211_MODE_VHT_5GHZ] = IFM_IEEE80211_VHT5G,
1880 };
1881 u_int mopt;
1882
1883 mopt = mopts[mode];
1884 if (addsta)
1885 ADD(ic, mword, mopt); /* STA mode has no cap */
1886 if (caps & IEEE80211_C_IBSS)
1887 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC);
1888 if (caps & IEEE80211_C_HOSTAP)
1889 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP);
1890 if (caps & IEEE80211_C_AHDEMO)
1891 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0);
1892 if (caps & IEEE80211_C_MONITOR)
1893 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR);
1894 if (caps & IEEE80211_C_WDS)
1895 ADD(media, mword, mopt | IFM_IEEE80211_WDS);
1896 if (caps & IEEE80211_C_MBSS)
1897 ADD(media, mword, mopt | IFM_IEEE80211_MBSS);
1898 #undef ADD
1899 }
1900
1901 /*
1902 * Setup the media data structures according to the channel and
1903 * rate tables.
1904 */
1905 static int
1906 ieee80211_media_setup(struct ieee80211com *ic,
1907 struct ifmedia *media, int caps, int addsta,
1908 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
1909 {
1910 int i, j, rate, maxrate, mword, r;
1911 enum ieee80211_phymode mode;
1912 const struct ieee80211_rateset *rs;
1913 struct ieee80211_rateset allrates;
1914
1915 /*
1916 * Fill in media characteristics.
1917 */
1918 ifmedia_init(media, 0, media_change, media_stat);
1919 maxrate = 0;
1920 /*
1921 * Add media for legacy operating modes.
1922 */
1923 memset(&allrates, 0, sizeof(allrates));
1924 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) {
1925 if (isclr(ic->ic_modecaps, mode))
1926 continue;
1927 addmedia(media, caps, addsta, mode, IFM_AUTO);
1928 if (mode == IEEE80211_MODE_AUTO)
1929 continue;
1930 rs = &ic->ic_sup_rates[mode];
1931 for (i = 0; i < rs->rs_nrates; i++) {
1932 rate = rs->rs_rates[i];
1933 mword = ieee80211_rate2media(ic, rate, mode);
1934 if (mword == 0)
1935 continue;
1936 addmedia(media, caps, addsta, mode, mword);
1937 /*
1938 * Add legacy rate to the collection of all rates.
1939 */
1940 r = rate & IEEE80211_RATE_VAL;
1941 for (j = 0; j < allrates.rs_nrates; j++)
1942 if (allrates.rs_rates[j] == r)
1943 break;
1944 if (j == allrates.rs_nrates) {
1945 /* unique, add to the set */
1946 allrates.rs_rates[j] = r;
1947 allrates.rs_nrates++;
1948 }
1949 rate = (rate & IEEE80211_RATE_VAL) / 2;
1950 if (rate > maxrate)
1951 maxrate = rate;
1952 }
1953 }
1954 for (i = 0; i < allrates.rs_nrates; i++) {
1955 mword = ieee80211_rate2media(ic, allrates.rs_rates[i],
1956 IEEE80211_MODE_AUTO);
1957 if (mword == 0)
1958 continue;
1959 /* NB: remove media options from mword */
1960 addmedia(media, caps, addsta,
1961 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword));
1962 }
1963 /*
1964 * Add HT/11n media. Note that we do not have enough
1965 * bits in the media subtype to express the MCS so we
1966 * use a "placeholder" media subtype and any fixed MCS
1967 * must be specified with a different mechanism.
1968 */
1969 for (; mode <= IEEE80211_MODE_11NG; mode++) {
1970 if (isclr(ic->ic_modecaps, mode))
1971 continue;
1972 addmedia(media, caps, addsta, mode, IFM_AUTO);
1973 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS);
1974 }
1975 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) ||
1976 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) {
1977 addmedia(media, caps, addsta,
1978 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS);
1979 i = ic->ic_txstream * 8 - 1;
1980 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) &&
1981 (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40))
1982 rate = ieee80211_htrates[i].ht40_rate_400ns;
1983 else if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40))
1984 rate = ieee80211_htrates[i].ht40_rate_800ns;
1985 else if ((ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20))
1986 rate = ieee80211_htrates[i].ht20_rate_400ns;
1987 else
1988 rate = ieee80211_htrates[i].ht20_rate_800ns;
1989 if (rate > maxrate)
1990 maxrate = rate;
1991 }
1992
1993 /*
1994 * Add VHT media.
1995 * XXX-BZ skip "VHT_2GHZ" for now.
1996 */
1997 for (mode = IEEE80211_MODE_VHT_5GHZ; mode <= IEEE80211_MODE_VHT_5GHZ;
1998 mode++) {
1999 if (isclr(ic->ic_modecaps, mode))
2000 continue;
2001 addmedia(media, caps, addsta, mode, IFM_AUTO);
2002 addmedia(media, caps, addsta, mode, IFM_IEEE80211_VHT);
2003 }
2004 if (isset(ic->ic_modecaps, IEEE80211_MODE_VHT_5GHZ)) {
2005 addmedia(media, caps, addsta,
2006 IEEE80211_MODE_AUTO, IFM_IEEE80211_VHT);
2007
2008 /* XXX TODO: VHT maxrate */
2009 }
2010
2011 return maxrate;
2012 }
2013
2014 /* XXX inline or eliminate? */
2015 const struct ieee80211_rateset *
2016 ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c)
2017 {
2018 /* XXX does this work for 11ng basic rates? */
2019 return &ic->ic_sup_rates[ieee80211_chan2mode(c)];
2020 }
2021
2022 /* XXX inline or eliminate? */
2023 const struct ieee80211_htrateset *
2024 ieee80211_get_suphtrates(struct ieee80211com *ic,
2025 const struct ieee80211_channel *c)
2026 {
2027 return &ic->ic_sup_htrates;
2028 }
2029
2030 void
2031 ieee80211_announce(struct ieee80211com *ic)
2032 {
2033 int i, rate, mword;
2034 enum ieee80211_phymode mode;
2035 const struct ieee80211_rateset *rs;
2036
2037 /* NB: skip AUTO since it has no rates */
2038 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) {
2039 if (isclr(ic->ic_modecaps, mode))
2040 continue;
2041 ic_printf(ic, "%s rates: ", ieee80211_phymode_name[mode]);
2042 rs = &ic->ic_sup_rates[mode];
2043 for (i = 0; i < rs->rs_nrates; i++) {
2044 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode);
2045 if (mword == 0)
2046 continue;
2047 rate = ieee80211_media2rate(mword);
2048 printf("%s%d%sMbps", (i != 0 ? " " : ""),
2049 rate / 2, ((rate & 0x1) != 0 ? ".5" : ""));
2050 }
2051 printf("\n");
2052 }
2053 ieee80211_ht_announce(ic);
2054 ieee80211_vht_announce(ic);
2055 }
2056
2057 void
2058 ieee80211_announce_channels(struct ieee80211com *ic)
2059 {
2060 const struct ieee80211_channel *c;
2061 char type;
2062 int i, cw;
2063
2064 printf("Chan Freq CW RegPwr MinPwr MaxPwr\n");
2065 for (i = 0; i < ic->ic_nchans; i++) {
2066 c = &ic->ic_channels[i];
2067 if (IEEE80211_IS_CHAN_ST(c))
2068 type = 'S';
2069 else if (IEEE80211_IS_CHAN_108A(c))
2070 type = 'T';
2071 else if (IEEE80211_IS_CHAN_108G(c))
2072 type = 'G';
2073 else if (IEEE80211_IS_CHAN_HT(c))
2074 type = 'n';
2075 else if (IEEE80211_IS_CHAN_A(c))
2076 type = 'a';
2077 else if (IEEE80211_IS_CHAN_ANYG(c))
2078 type = 'g';
2079 else if (IEEE80211_IS_CHAN_B(c))
2080 type = 'b';
2081 else
2082 type = 'f';
2083 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c))
2084 cw = 40;
2085 else if (IEEE80211_IS_CHAN_HALF(c))
2086 cw = 10;
2087 else if (IEEE80211_IS_CHAN_QUARTER(c))
2088 cw = 5;
2089 else
2090 cw = 20;
2091 printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n"
2092 , c->ic_ieee, c->ic_freq, type
2093 , cw
2094 , IEEE80211_IS_CHAN_HT40U(c) ? '+' :
2095 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' '
2096 , c->ic_maxregpower
2097 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0
2098 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0
2099 );
2100 }
2101 }
2102
2103 static int
2104 media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode)
2105 {
2106 switch (IFM_MODE(ime->ifm_media)) {
2107 case IFM_IEEE80211_11A:
2108 *mode = IEEE80211_MODE_11A;
2109 break;
2110 case IFM_IEEE80211_11B:
2111 *mode = IEEE80211_MODE_11B;
2112 break;
2113 case IFM_IEEE80211_11G:
2114 *mode = IEEE80211_MODE_11G;
2115 break;
2116 case IFM_IEEE80211_FH:
2117 *mode = IEEE80211_MODE_FH;
2118 break;
2119 case IFM_IEEE80211_11NA:
2120 *mode = IEEE80211_MODE_11NA;
2121 break;
2122 case IFM_IEEE80211_11NG:
2123 *mode = IEEE80211_MODE_11NG;
2124 break;
2125 case IFM_IEEE80211_VHT2G:
2126 *mode = IEEE80211_MODE_VHT_2GHZ;
2127 break;
2128 case IFM_IEEE80211_VHT5G:
2129 *mode = IEEE80211_MODE_VHT_5GHZ;
2130 break;
2131 case IFM_AUTO:
2132 *mode = IEEE80211_MODE_AUTO;
2133 break;
2134 default:
2135 return 0;
2136 }
2137 /*
2138 * Turbo mode is an ``option''.
2139 * XXX does not apply to AUTO
2140 */
2141 if (ime->ifm_media & IFM_IEEE80211_TURBO) {
2142 if (*mode == IEEE80211_MODE_11A) {
2143 if (flags & IEEE80211_F_TURBOP)
2144 *mode = IEEE80211_MODE_TURBO_A;
2145 else
2146 *mode = IEEE80211_MODE_STURBO_A;
2147 } else if (*mode == IEEE80211_MODE_11G)
2148 *mode = IEEE80211_MODE_TURBO_G;
2149 else
2150 return 0;
2151 }
2152 /* XXX HT40 +/- */
2153 return 1;
2154 }
2155
2156 /*
2157 * Handle a media change request on the vap interface.
2158 */
2159 int
2160 ieee80211_media_change(struct ifnet *ifp)
2161 {
2162 struct ieee80211vap *vap = ifp->if_softc;
2163 struct ifmedia_entry *ime = vap->iv_media.ifm_cur;
2164 uint16_t newmode;
2165
2166 if (!media2mode(ime, vap->iv_flags, &newmode))
2167 return EINVAL;
2168 if (vap->iv_des_mode != newmode) {
2169 vap->iv_des_mode = newmode;
2170 /* XXX kick state machine if up+running */
2171 }
2172 return 0;
2173 }
2174
2175 /*
2176 * Common code to calculate the media status word
2177 * from the operating mode and channel state.
2178 */
2179 static int
2180 media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan)
2181 {
2182 int status;
2183
2184 status = IFM_IEEE80211;
2185 switch (opmode) {
2186 case IEEE80211_M_STA:
2187 break;
2188 case IEEE80211_M_IBSS:
2189 status |= IFM_IEEE80211_ADHOC;
2190 break;
2191 case IEEE80211_M_HOSTAP:
2192 status |= IFM_IEEE80211_HOSTAP;
2193 break;
2194 case IEEE80211_M_MONITOR:
2195 status |= IFM_IEEE80211_MONITOR;
2196 break;
2197 case IEEE80211_M_AHDEMO:
2198 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0;
2199 break;
2200 case IEEE80211_M_WDS:
2201 status |= IFM_IEEE80211_WDS;
2202 break;
2203 case IEEE80211_M_MBSS:
2204 status |= IFM_IEEE80211_MBSS;
2205 break;
2206 }
2207 if (IEEE80211_IS_CHAN_HTA(chan)) {
2208 status |= IFM_IEEE80211_11NA;
2209 } else if (IEEE80211_IS_CHAN_HTG(chan)) {
2210 status |= IFM_IEEE80211_11NG;
2211 } else if (IEEE80211_IS_CHAN_A(chan)) {
2212 status |= IFM_IEEE80211_11A;
2213 } else if (IEEE80211_IS_CHAN_B(chan)) {
2214 status |= IFM_IEEE80211_11B;
2215 } else if (IEEE80211_IS_CHAN_ANYG(chan)) {
2216 status |= IFM_IEEE80211_11G;
2217 } else if (IEEE80211_IS_CHAN_FHSS(chan)) {
2218 status |= IFM_IEEE80211_FH;
2219 }
2220 /* XXX else complain? */
2221
2222 if (IEEE80211_IS_CHAN_TURBO(chan))
2223 status |= IFM_IEEE80211_TURBO;
2224 #if 0
2225 if (IEEE80211_IS_CHAN_HT20(chan))
2226 status |= IFM_IEEE80211_HT20;
2227 if (IEEE80211_IS_CHAN_HT40(chan))
2228 status |= IFM_IEEE80211_HT40;
2229 #endif
2230 return status;
2231 }
2232
2233 void
2234 ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr)
2235 {
2236 struct ieee80211vap *vap = ifp->if_softc;
2237 struct ieee80211com *ic = vap->iv_ic;
2238 enum ieee80211_phymode mode;
2239
2240 imr->ifm_status = IFM_AVALID;
2241 /*
2242 * NB: use the current channel's mode to lock down a xmit
2243 * rate only when running; otherwise we may have a mismatch
2244 * in which case the rate will not be convertible.
2245 */
2246 if (vap->iv_state == IEEE80211_S_RUN ||
2247 vap->iv_state == IEEE80211_S_SLEEP) {
2248 imr->ifm_status |= IFM_ACTIVE;
2249 mode = ieee80211_chan2mode(ic->ic_curchan);
2250 } else
2251 mode = IEEE80211_MODE_AUTO;
2252 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan);
2253 /*
2254 * Calculate a current rate if possible.
2255 */
2256 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) {
2257 /*
2258 * A fixed rate is set, report that.
2259 */
2260 imr->ifm_active |= ieee80211_rate2media(ic,
2261 vap->iv_txparms[mode].ucastrate, mode);
2262 } else if (vap->iv_opmode == IEEE80211_M_STA) {
2263 /*
2264 * In station mode report the current transmit rate.
2265 */
2266 imr->ifm_active |= ieee80211_rate2media(ic,
2267 vap->iv_bss->ni_txrate, mode);
2268 } else
2269 imr->ifm_active |= IFM_AUTO;
2270 if (imr->ifm_status & IFM_ACTIVE)
2271 imr->ifm_current = imr->ifm_active;
2272 }
2273
2274 /*
2275 * Set the current phy mode and recalculate the active channel
2276 * set based on the available channels for this mode. Also
2277 * select a new default/current channel if the current one is
2278 * inappropriate for this mode.
2279 */
2280 int
2281 ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode)
2282 {
2283 /*
2284 * Adjust basic rates in 11b/11g supported rate set.
2285 * Note that if operating on a hal/quarter rate channel
2286 * this is a noop as those rates sets are different
2287 * and used instead.
2288 */
2289 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B)
2290 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode);
2291
2292 ic->ic_curmode = mode;
2293 ieee80211_reset_erp(ic); /* reset global ERP state */
2294
2295 return 0;
2296 }
2297
2298 /*
2299 * Return the phy mode for with the specified channel.
2300 */
2301 enum ieee80211_phymode
2302 ieee80211_chan2mode(const struct ieee80211_channel *chan)
2303 {
2304
2305 if (IEEE80211_IS_CHAN_VHT_2GHZ(chan))
2306 return IEEE80211_MODE_VHT_2GHZ;
2307 else if (IEEE80211_IS_CHAN_VHT_5GHZ(chan))
2308 return IEEE80211_MODE_VHT_5GHZ;
2309 else if (IEEE80211_IS_CHAN_HTA(chan))
2310 return IEEE80211_MODE_11NA;
2311 else if (IEEE80211_IS_CHAN_HTG(chan))
2312 return IEEE80211_MODE_11NG;
2313 else if (IEEE80211_IS_CHAN_108G(chan))
2314 return IEEE80211_MODE_TURBO_G;
2315 else if (IEEE80211_IS_CHAN_ST(chan))
2316 return IEEE80211_MODE_STURBO_A;
2317 else if (IEEE80211_IS_CHAN_TURBO(chan))
2318 return IEEE80211_MODE_TURBO_A;
2319 else if (IEEE80211_IS_CHAN_HALF(chan))
2320 return IEEE80211_MODE_HALF;
2321 else if (IEEE80211_IS_CHAN_QUARTER(chan))
2322 return IEEE80211_MODE_QUARTER;
2323 else if (IEEE80211_IS_CHAN_A(chan))
2324 return IEEE80211_MODE_11A;
2325 else if (IEEE80211_IS_CHAN_ANYG(chan))
2326 return IEEE80211_MODE_11G;
2327 else if (IEEE80211_IS_CHAN_B(chan))
2328 return IEEE80211_MODE_11B;
2329 else if (IEEE80211_IS_CHAN_FHSS(chan))
2330 return IEEE80211_MODE_FH;
2331
2332 /* NB: should not get here */
2333 printf("%s: cannot map channel to mode; freq %u flags 0x%x\n",
2334 __func__, chan->ic_freq, chan->ic_flags);
2335 return IEEE80211_MODE_11B;
2336 }
2337
2338 struct ratemedia {
2339 u_int match; /* rate + mode */
2340 u_int media; /* if_media rate */
2341 };
2342
2343 static int
2344 findmedia(const struct ratemedia rates[], int n, u_int match)
2345 {
2346 int i;
2347
2348 for (i = 0; i < n; i++)
2349 if (rates[i].match == match)
2350 return rates[i].media;
2351 return IFM_AUTO;
2352 }
2353
2354 /*
2355 * Convert IEEE80211 rate value to ifmedia subtype.
2356 * Rate is either a legacy rate in units of 0.5Mbps
2357 * or an MCS index.
2358 */
2359 int
2360 ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode)
2361 {
2362 static const struct ratemedia rates[] = {
2363 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 },
2364 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 },
2365 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 },
2366 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 },
2367 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 },
2368 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 },
2369 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 },
2370 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 },
2371 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 },
2372 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 },
2373 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 },
2374 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 },
2375 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 },
2376 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 },
2377 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 },
2378 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 },
2379 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 },
2380 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 },
2381 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 },
2382 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 },
2383 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 },
2384 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 },
2385 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 },
2386 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 },
2387 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 },
2388 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 },
2389 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 },
2390 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 },
2391 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 },
2392 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 },
2393 /* NB: OFDM72 doesn't really exist so we don't handle it */
2394 };
2395 static const struct ratemedia htrates[] = {
2396 { 0, IFM_IEEE80211_MCS },
2397 { 1, IFM_IEEE80211_MCS },
2398 { 2, IFM_IEEE80211_MCS },
2399 { 3, IFM_IEEE80211_MCS },
2400 { 4, IFM_IEEE80211_MCS },
2401 { 5, IFM_IEEE80211_MCS },
2402 { 6, IFM_IEEE80211_MCS },
2403 { 7, IFM_IEEE80211_MCS },
2404 { 8, IFM_IEEE80211_MCS },
2405 { 9, IFM_IEEE80211_MCS },
2406 { 10, IFM_IEEE80211_MCS },
2407 { 11, IFM_IEEE80211_MCS },
2408 { 12, IFM_IEEE80211_MCS },
2409 { 13, IFM_IEEE80211_MCS },
2410 { 14, IFM_IEEE80211_MCS },
2411 { 15, IFM_IEEE80211_MCS },
2412 { 16, IFM_IEEE80211_MCS },
2413 { 17, IFM_IEEE80211_MCS },
2414 { 18, IFM_IEEE80211_MCS },
2415 { 19, IFM_IEEE80211_MCS },
2416 { 20, IFM_IEEE80211_MCS },
2417 { 21, IFM_IEEE80211_MCS },
2418 { 22, IFM_IEEE80211_MCS },
2419 { 23, IFM_IEEE80211_MCS },
2420 { 24, IFM_IEEE80211_MCS },
2421 { 25, IFM_IEEE80211_MCS },
2422 { 26, IFM_IEEE80211_MCS },
2423 { 27, IFM_IEEE80211_MCS },
2424 { 28, IFM_IEEE80211_MCS },
2425 { 29, IFM_IEEE80211_MCS },
2426 { 30, IFM_IEEE80211_MCS },
2427 { 31, IFM_IEEE80211_MCS },
2428 { 32, IFM_IEEE80211_MCS },
2429 { 33, IFM_IEEE80211_MCS },
2430 { 34, IFM_IEEE80211_MCS },
2431 { 35, IFM_IEEE80211_MCS },
2432 { 36, IFM_IEEE80211_MCS },
2433 { 37, IFM_IEEE80211_MCS },
2434 { 38, IFM_IEEE80211_MCS },
2435 { 39, IFM_IEEE80211_MCS },
2436 { 40, IFM_IEEE80211_MCS },
2437 { 41, IFM_IEEE80211_MCS },
2438 { 42, IFM_IEEE80211_MCS },
2439 { 43, IFM_IEEE80211_MCS },
2440 { 44, IFM_IEEE80211_MCS },
2441 { 45, IFM_IEEE80211_MCS },
2442 { 46, IFM_IEEE80211_MCS },
2443 { 47, IFM_IEEE80211_MCS },
2444 { 48, IFM_IEEE80211_MCS },
2445 { 49, IFM_IEEE80211_MCS },
2446 { 50, IFM_IEEE80211_MCS },
2447 { 51, IFM_IEEE80211_MCS },
2448 { 52, IFM_IEEE80211_MCS },
2449 { 53, IFM_IEEE80211_MCS },
2450 { 54, IFM_IEEE80211_MCS },
2451 { 55, IFM_IEEE80211_MCS },
2452 { 56, IFM_IEEE80211_MCS },
2453 { 57, IFM_IEEE80211_MCS },
2454 { 58, IFM_IEEE80211_MCS },
2455 { 59, IFM_IEEE80211_MCS },
2456 { 60, IFM_IEEE80211_MCS },
2457 { 61, IFM_IEEE80211_MCS },
2458 { 62, IFM_IEEE80211_MCS },
2459 { 63, IFM_IEEE80211_MCS },
2460 { 64, IFM_IEEE80211_MCS },
2461 { 65, IFM_IEEE80211_MCS },
2462 { 66, IFM_IEEE80211_MCS },
2463 { 67, IFM_IEEE80211_MCS },
2464 { 68, IFM_IEEE80211_MCS },
2465 { 69, IFM_IEEE80211_MCS },
2466 { 70, IFM_IEEE80211_MCS },
2467 { 71, IFM_IEEE80211_MCS },
2468 { 72, IFM_IEEE80211_MCS },
2469 { 73, IFM_IEEE80211_MCS },
2470 { 74, IFM_IEEE80211_MCS },
2471 { 75, IFM_IEEE80211_MCS },
2472 { 76, IFM_IEEE80211_MCS },
2473 };
2474 static const struct ratemedia vhtrates[] = {
2475 { 0, IFM_IEEE80211_VHT },
2476 { 1, IFM_IEEE80211_VHT },
2477 { 2, IFM_IEEE80211_VHT },
2478 { 3, IFM_IEEE80211_VHT },
2479 { 4, IFM_IEEE80211_VHT },
2480 { 5, IFM_IEEE80211_VHT },
2481 { 6, IFM_IEEE80211_VHT },
2482 { 7, IFM_IEEE80211_VHT },
2483 { 8, IFM_IEEE80211_VHT }, /* Optional. */
2484 { 9, IFM_IEEE80211_VHT }, /* Optional. */
2485 #if 0
2486 /* Some QCA and BRCM seem to support this; offspec. */
2487 { 10, IFM_IEEE80211_VHT },
2488 { 11, IFM_IEEE80211_VHT },
2489 #endif
2490 };
2491 int m;
2492
2493 /*
2494 * Check 11ac/11n rates first for match as an MCS.
2495 */
2496 if (mode == IEEE80211_MODE_VHT_5GHZ) {
2497 if (rate & IFM_IEEE80211_VHT) {
2498 rate &= ~IFM_IEEE80211_VHT;
2499 m = findmedia(vhtrates, nitems(vhtrates), rate);
2500 if (m != IFM_AUTO)
2501 return (m | IFM_IEEE80211_VHT);
2502 }
2503 } else if (mode == IEEE80211_MODE_11NA) {
2504 if (rate & IEEE80211_RATE_MCS) {
2505 rate &= ~IEEE80211_RATE_MCS;
2506 m = findmedia(htrates, nitems(htrates), rate);
2507 if (m != IFM_AUTO)
2508 return m | IFM_IEEE80211_11NA;
2509 }
2510 } else if (mode == IEEE80211_MODE_11NG) {
2511 /* NB: 12 is ambiguous, it will be treated as an MCS */
2512 if (rate & IEEE80211_RATE_MCS) {
2513 rate &= ~IEEE80211_RATE_MCS;
2514 m = findmedia(htrates, nitems(htrates), rate);
2515 if (m != IFM_AUTO)
2516 return m | IFM_IEEE80211_11NG;
2517 }
2518 }
2519 rate &= IEEE80211_RATE_VAL;
2520 switch (mode) {
2521 case IEEE80211_MODE_11A:
2522 case IEEE80211_MODE_HALF: /* XXX good 'nuf */
2523 case IEEE80211_MODE_QUARTER:
2524 case IEEE80211_MODE_11NA:
2525 case IEEE80211_MODE_TURBO_A:
2526 case IEEE80211_MODE_STURBO_A:
2527 return findmedia(rates, nitems(rates),
2528 rate | IFM_IEEE80211_11A);
2529 case IEEE80211_MODE_11B:
2530 return findmedia(rates, nitems(rates),
2531 rate | IFM_IEEE80211_11B);
2532 case IEEE80211_MODE_FH:
2533 return findmedia(rates, nitems(rates),
2534 rate | IFM_IEEE80211_FH);
2535 case IEEE80211_MODE_AUTO:
2536 /* NB: ic may be NULL for some drivers */
2537 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH)
2538 return findmedia(rates, nitems(rates),
2539 rate | IFM_IEEE80211_FH);
2540 /* NB: hack, 11g matches both 11b+11a rates */
2541 /* fall thru... */
2542 case IEEE80211_MODE_11G:
2543 case IEEE80211_MODE_11NG:
2544 case IEEE80211_MODE_TURBO_G:
2545 return findmedia(rates, nitems(rates), rate | IFM_IEEE80211_11G);
2546 case IEEE80211_MODE_VHT_2GHZ:
2547 case IEEE80211_MODE_VHT_5GHZ:
2548 /* XXX TODO: need to figure out mapping for VHT rates */
2549 return IFM_AUTO;
2550 }
2551 return IFM_AUTO;
2552 }
2553
2554 int
2555 ieee80211_media2rate(int mword)
2556 {
2557 static const int ieeerates[] = {
2558 -1, /* IFM_AUTO */
2559 0, /* IFM_MANUAL */
2560 0, /* IFM_NONE */
2561 2, /* IFM_IEEE80211_FH1 */
2562 4, /* IFM_IEEE80211_FH2 */
2563 2, /* IFM_IEEE80211_DS1 */
2564 4, /* IFM_IEEE80211_DS2 */
2565 11, /* IFM_IEEE80211_DS5 */
2566 22, /* IFM_IEEE80211_DS11 */
2567 44, /* IFM_IEEE80211_DS22 */
2568 12, /* IFM_IEEE80211_OFDM6 */
2569 18, /* IFM_IEEE80211_OFDM9 */
2570 24, /* IFM_IEEE80211_OFDM12 */
2571 36, /* IFM_IEEE80211_OFDM18 */
2572 48, /* IFM_IEEE80211_OFDM24 */
2573 72, /* IFM_IEEE80211_OFDM36 */
2574 96, /* IFM_IEEE80211_OFDM48 */
2575 108, /* IFM_IEEE80211_OFDM54 */
2576 144, /* IFM_IEEE80211_OFDM72 */
2577 0, /* IFM_IEEE80211_DS354k */
2578 0, /* IFM_IEEE80211_DS512k */
2579 6, /* IFM_IEEE80211_OFDM3 */
2580 9, /* IFM_IEEE80211_OFDM4 */
2581 54, /* IFM_IEEE80211_OFDM27 */
2582 -1, /* IFM_IEEE80211_MCS */
2583 -1, /* IFM_IEEE80211_VHT */
2584 };
2585 return IFM_SUBTYPE(mword) < nitems(ieeerates) ?
2586 ieeerates[IFM_SUBTYPE(mword)] : 0;
2587 }
2588
2589 /*
2590 * The following hash function is adapted from "Hash Functions" by Bob Jenkins
2591 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997).
2592 */
2593 #define mix(a, b, c) \
2594 do { \
2595 a -= b; a -= c; a ^= (c >> 13); \
2596 b -= c; b -= a; b ^= (a << 8); \
2597 c -= a; c -= b; c ^= (b >> 13); \
2598 a -= b; a -= c; a ^= (c >> 12); \
2599 b -= c; b -= a; b ^= (a << 16); \
2600 c -= a; c -= b; c ^= (b >> 5); \
2601 a -= b; a -= c; a ^= (c >> 3); \
2602 b -= c; b -= a; b ^= (a << 10); \
2603 c -= a; c -= b; c ^= (b >> 15); \
2604 } while (/*CONSTCOND*/0)
2605
2606 uint32_t
2607 ieee80211_mac_hash(const struct ieee80211com *ic,
2608 const uint8_t addr[IEEE80211_ADDR_LEN])
2609 {
2610 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key;
2611
2612 b += addr[5] << 8;
2613 b += addr[4];
2614 a += addr[3] << 24;
2615 a += addr[2] << 16;
2616 a += addr[1] << 8;
2617 a += addr[0];
2618
2619 mix(a, b, c);
2620
2621 return c;
2622 }
2623 #undef mix
2624
2625 char
2626 ieee80211_channel_type_char(const struct ieee80211_channel *c)
2627 {
2628 if (IEEE80211_IS_CHAN_ST(c))
2629 return 'S';
2630 if (IEEE80211_IS_CHAN_108A(c))
2631 return 'T';
2632 if (IEEE80211_IS_CHAN_108G(c))
2633 return 'G';
2634 if (IEEE80211_IS_CHAN_VHT(c))
2635 return 'v';
2636 if (IEEE80211_IS_CHAN_HT(c))
2637 return 'n';
2638 if (IEEE80211_IS_CHAN_A(c))
2639 return 'a';
2640 if (IEEE80211_IS_CHAN_ANYG(c))
2641 return 'g';
2642 if (IEEE80211_IS_CHAN_B(c))
2643 return 'b';
2644 return 'f';
2645 }
Cache object: b3e73761bf7678eeb8248de38c2dad07
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