1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
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 /*
31 * IEEE 802.11 generic handler
32 */
33 #include "opt_wlan.h"
34
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/kernel.h>
38 #include <sys/malloc.h>
39 #include <sys/socket.h>
40 #include <sys/sbuf.h>
41
42 #include <machine/stdarg.h>
43
44 #include <net/if.h>
45 #include <net/if_var.h>
46 #include <net/if_dl.h>
47 #include <net/if_media.h>
48 #include <net/if_private.h>
49 #include <net/if_types.h>
50 #include <net/ethernet.h>
51
52 #include <net80211/ieee80211_var.h>
53 #include <net80211/ieee80211_regdomain.h>
54 #ifdef IEEE80211_SUPPORT_SUPERG
55 #include <net80211/ieee80211_superg.h>
56 #endif
57 #include <net80211/ieee80211_ratectl.h>
58 #include <net80211/ieee80211_vht.h>
59
60 #include <net/bpf.h>
61
62 const char *ieee80211_phymode_name[IEEE80211_MODE_MAX] = {
63 [IEEE80211_MODE_AUTO] = "auto",
64 [IEEE80211_MODE_11A] = "11a",
65 [IEEE80211_MODE_11B] = "11b",
66 [IEEE80211_MODE_11G] = "11g",
67 [IEEE80211_MODE_FH] = "FH",
68 [IEEE80211_MODE_TURBO_A] = "turboA",
69 [IEEE80211_MODE_TURBO_G] = "turboG",
70 [IEEE80211_MODE_STURBO_A] = "sturboA",
71 [IEEE80211_MODE_HALF] = "half",
72 [IEEE80211_MODE_QUARTER] = "quarter",
73 [IEEE80211_MODE_11NA] = "11na",
74 [IEEE80211_MODE_11NG] = "11ng",
75 [IEEE80211_MODE_VHT_2GHZ] = "11acg",
76 [IEEE80211_MODE_VHT_5GHZ] = "11ac",
77 };
78 /* map ieee80211_opmode to the corresponding capability bit */
79 const int ieee80211_opcap[IEEE80211_OPMODE_MAX] = {
80 [IEEE80211_M_IBSS] = IEEE80211_C_IBSS,
81 [IEEE80211_M_WDS] = IEEE80211_C_WDS,
82 [IEEE80211_M_STA] = IEEE80211_C_STA,
83 [IEEE80211_M_AHDEMO] = IEEE80211_C_AHDEMO,
84 [IEEE80211_M_HOSTAP] = IEEE80211_C_HOSTAP,
85 [IEEE80211_M_MONITOR] = IEEE80211_C_MONITOR,
86 #ifdef IEEE80211_SUPPORT_MESH
87 [IEEE80211_M_MBSS] = IEEE80211_C_MBSS,
88 #endif
89 };
90
91 const uint8_t ieee80211broadcastaddr[IEEE80211_ADDR_LEN] =
92 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
93
94 static void ieee80211_syncflag_locked(struct ieee80211com *ic, int flag);
95 static void ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag);
96 static void ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag);
97 static void ieee80211_syncflag_vht_locked(struct ieee80211com *ic, int flag);
98 static int ieee80211_media_setup(struct ieee80211com *ic,
99 struct ifmedia *media, int caps, int addsta,
100 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat);
101 static int media_status(enum ieee80211_opmode,
102 const struct ieee80211_channel *);
103 static uint64_t ieee80211_get_counter(struct ifnet *, ift_counter);
104
105 MALLOC_DEFINE(M_80211_VAP, "80211vap", "802.11 vap state");
106
107 /*
108 * Default supported rates for 802.11 operation (in IEEE .5Mb units).
109 */
110 #define B(r) ((r) | IEEE80211_RATE_BASIC)
111 static const struct ieee80211_rateset ieee80211_rateset_11a =
112 { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } };
113 static const struct ieee80211_rateset ieee80211_rateset_half =
114 { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } };
115 static const struct ieee80211_rateset ieee80211_rateset_quarter =
116 { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } };
117 static const struct ieee80211_rateset ieee80211_rateset_11b =
118 { 4, { B(2), B(4), B(11), B(22) } };
119 /* NB: OFDM rates are handled specially based on mode */
120 static const struct ieee80211_rateset ieee80211_rateset_11g =
121 { 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } };
122 #undef B
123
124 static int set_vht_extchan(struct ieee80211_channel *c);
125
126 /*
127 * Fill in 802.11 available channel set, mark
128 * all available channels as active, and pick
129 * a default channel if not already specified.
130 */
131 void
ieee80211_chan_init(struct ieee80211com * ic)132 ieee80211_chan_init(struct ieee80211com *ic)
133 {
134 #define DEFAULTRATES(m, def) do { \
135 if (ic->ic_sup_rates[m].rs_nrates == 0) \
136 ic->ic_sup_rates[m] = def; \
137 } while (0)
138 struct ieee80211_channel *c;
139 int i;
140
141 KASSERT(0 < ic->ic_nchans && ic->ic_nchans <= IEEE80211_CHAN_MAX,
142 ("invalid number of channels specified: %u", ic->ic_nchans));
143 memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail));
144 memset(ic->ic_modecaps, 0, sizeof(ic->ic_modecaps));
145 setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO);
146 for (i = 0; i < ic->ic_nchans; i++) {
147 c = &ic->ic_channels[i];
148 KASSERT(c->ic_flags != 0, ("channel with no flags"));
149 /*
150 * Help drivers that work only with frequencies by filling
151 * in IEEE channel #'s if not already calculated. Note this
152 * mimics similar work done in ieee80211_setregdomain when
153 * changing regulatory state.
154 */
155 if (c->ic_ieee == 0)
156 c->ic_ieee = ieee80211_mhz2ieee(c->ic_freq,c->ic_flags);
157
158 /*
159 * Setup the HT40/VHT40 upper/lower bits.
160 * The VHT80/... math is done elsewhere.
161 */
162 if (IEEE80211_IS_CHAN_HT40(c) && c->ic_extieee == 0)
163 c->ic_extieee = ieee80211_mhz2ieee(c->ic_freq +
164 (IEEE80211_IS_CHAN_HT40U(c) ? 20 : -20),
165 c->ic_flags);
166
167 /* Update VHT math */
168 /*
169 * XXX VHT again, note that this assumes VHT80/... channels
170 * are legit already.
171 */
172 set_vht_extchan(c);
173
174 /* default max tx power to max regulatory */
175 if (c->ic_maxpower == 0)
176 c->ic_maxpower = 2*c->ic_maxregpower;
177 setbit(ic->ic_chan_avail, c->ic_ieee);
178 /*
179 * Identify mode capabilities.
180 */
181 if (IEEE80211_IS_CHAN_A(c))
182 setbit(ic->ic_modecaps, IEEE80211_MODE_11A);
183 if (IEEE80211_IS_CHAN_B(c))
184 setbit(ic->ic_modecaps, IEEE80211_MODE_11B);
185 if (IEEE80211_IS_CHAN_ANYG(c))
186 setbit(ic->ic_modecaps, IEEE80211_MODE_11G);
187 if (IEEE80211_IS_CHAN_FHSS(c))
188 setbit(ic->ic_modecaps, IEEE80211_MODE_FH);
189 if (IEEE80211_IS_CHAN_108A(c))
190 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A);
191 if (IEEE80211_IS_CHAN_108G(c))
192 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G);
193 if (IEEE80211_IS_CHAN_ST(c))
194 setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A);
195 if (IEEE80211_IS_CHAN_HALF(c))
196 setbit(ic->ic_modecaps, IEEE80211_MODE_HALF);
197 if (IEEE80211_IS_CHAN_QUARTER(c))
198 setbit(ic->ic_modecaps, IEEE80211_MODE_QUARTER);
199 if (IEEE80211_IS_CHAN_HTA(c))
200 setbit(ic->ic_modecaps, IEEE80211_MODE_11NA);
201 if (IEEE80211_IS_CHAN_HTG(c))
202 setbit(ic->ic_modecaps, IEEE80211_MODE_11NG);
203 if (IEEE80211_IS_CHAN_VHTA(c))
204 setbit(ic->ic_modecaps, IEEE80211_MODE_VHT_5GHZ);
205 if (IEEE80211_IS_CHAN_VHTG(c))
206 setbit(ic->ic_modecaps, IEEE80211_MODE_VHT_2GHZ);
207 }
208 /* initialize candidate channels to all available */
209 memcpy(ic->ic_chan_active, ic->ic_chan_avail,
210 sizeof(ic->ic_chan_avail));
211
212 /* sort channel table to allow lookup optimizations */
213 ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans);
214
215 /* invalidate any previous state */
216 ic->ic_bsschan = IEEE80211_CHAN_ANYC;
217 ic->ic_prevchan = NULL;
218 ic->ic_csa_newchan = NULL;
219 /* arbitrarily pick the first channel */
220 ic->ic_curchan = &ic->ic_channels[0];
221 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
222
223 /* fillin well-known rate sets if driver has not specified */
224 DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b);
225 DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g);
226 DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a);
227 DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a);
228 DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g);
229 DEFAULTRATES(IEEE80211_MODE_STURBO_A, ieee80211_rateset_11a);
230 DEFAULTRATES(IEEE80211_MODE_HALF, ieee80211_rateset_half);
231 DEFAULTRATES(IEEE80211_MODE_QUARTER, ieee80211_rateset_quarter);
232 DEFAULTRATES(IEEE80211_MODE_11NA, ieee80211_rateset_11a);
233 DEFAULTRATES(IEEE80211_MODE_11NG, ieee80211_rateset_11g);
234 DEFAULTRATES(IEEE80211_MODE_VHT_2GHZ, ieee80211_rateset_11g);
235 DEFAULTRATES(IEEE80211_MODE_VHT_5GHZ, ieee80211_rateset_11a);
236
237 /*
238 * Setup required information to fill the mcsset field, if driver did
239 * not. Assume a 2T2R setup for historic reasons.
240 */
241 if (ic->ic_rxstream == 0)
242 ic->ic_rxstream = 2;
243 if (ic->ic_txstream == 0)
244 ic->ic_txstream = 2;
245
246 ieee80211_init_suphtrates(ic);
247
248 /*
249 * Set auto mode to reset active channel state and any desired channel.
250 */
251 (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO);
252 #undef DEFAULTRATES
253 }
254
255 static void
null_update_mcast(struct ieee80211com * ic)256 null_update_mcast(struct ieee80211com *ic)
257 {
258
259 ic_printf(ic, "need multicast update callback\n");
260 }
261
262 static void
null_update_promisc(struct ieee80211com * ic)263 null_update_promisc(struct ieee80211com *ic)
264 {
265
266 ic_printf(ic, "need promiscuous mode update callback\n");
267 }
268
269 static void
null_update_chw(struct ieee80211com * ic)270 null_update_chw(struct ieee80211com *ic)
271 {
272
273 ic_printf(ic, "%s: need callback\n", __func__);
274 }
275
276 int
ic_printf(struct ieee80211com * ic,const char * fmt,...)277 ic_printf(struct ieee80211com *ic, const char * fmt, ...)
278 {
279 va_list ap;
280 int retval;
281
282 retval = printf("%s: ", ic->ic_name);
283 va_start(ap, fmt);
284 retval += vprintf(fmt, ap);
285 va_end(ap);
286 return (retval);
287 }
288
289 static LIST_HEAD(, ieee80211com) ic_head = LIST_HEAD_INITIALIZER(ic_head);
290 static struct mtx ic_list_mtx;
291 MTX_SYSINIT(ic_list, &ic_list_mtx, "ieee80211com list", MTX_DEF);
292
293 static int
sysctl_ieee80211coms(SYSCTL_HANDLER_ARGS)294 sysctl_ieee80211coms(SYSCTL_HANDLER_ARGS)
295 {
296 struct ieee80211com *ic;
297 struct sbuf sb;
298 char *sp;
299 int error;
300
301 error = sysctl_wire_old_buffer(req, 0);
302 if (error)
303 return (error);
304 sbuf_new_for_sysctl(&sb, NULL, 8, req);
305 sbuf_clear_flags(&sb, SBUF_INCLUDENUL);
306 sp = "";
307 mtx_lock(&ic_list_mtx);
308 LIST_FOREACH(ic, &ic_head, ic_next) {
309 sbuf_printf(&sb, "%s%s", sp, ic->ic_name);
310 sp = " ";
311 }
312 mtx_unlock(&ic_list_mtx);
313 error = sbuf_finish(&sb);
314 sbuf_delete(&sb);
315 return (error);
316 }
317
318 SYSCTL_PROC(_net_wlan, OID_AUTO, devices,
319 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0,
320 sysctl_ieee80211coms, "A", "names of available 802.11 devices");
321
322 /*
323 * Attach/setup the common net80211 state. Called by
324 * the driver on attach to prior to creating any vap's.
325 */
326 void
ieee80211_ifattach(struct ieee80211com * ic)327 ieee80211_ifattach(struct ieee80211com *ic)
328 {
329
330 IEEE80211_LOCK_INIT(ic, ic->ic_name);
331 IEEE80211_TX_LOCK_INIT(ic, ic->ic_name);
332 TAILQ_INIT(&ic->ic_vaps);
333
334 /* Create a taskqueue for all state changes */
335 ic->ic_tq = taskqueue_create("ic_taskq",
336 IEEE80211_M_WAITOK | IEEE80211_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(IEEE80211_M_WAITOK);
341 ic->ic_oerrors = counter_u64_alloc(IEEE80211_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
ieee80211_ifdetach(struct ieee80211com * ic)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 /*
438 * Called by drivers during attach to set the supported
439 * cipher set for software encryption.
440 */
441 void
ieee80211_set_software_ciphers(struct ieee80211com * ic,uint32_t cipher_suite)442 ieee80211_set_software_ciphers(struct ieee80211com *ic,
443 uint32_t cipher_suite)
444 {
445 ieee80211_crypto_set_supported_software_ciphers(ic, cipher_suite);
446 }
447
448 /*
449 * Called by drivers during attach to set the supported
450 * cipher set for hardware encryption.
451 */
452 void
ieee80211_set_hardware_ciphers(struct ieee80211com * ic,uint32_t cipher_suite)453 ieee80211_set_hardware_ciphers(struct ieee80211com *ic,
454 uint32_t cipher_suite)
455 {
456 ieee80211_crypto_set_supported_hardware_ciphers(ic, cipher_suite);
457 }
458
459 /*
460 * Called by drivers during attach to set the supported
461 * key management suites by the driver/hardware.
462 */
463 void
ieee80211_set_driver_keymgmt_suites(struct ieee80211com * ic,uint32_t keymgmt_set)464 ieee80211_set_driver_keymgmt_suites(struct ieee80211com *ic,
465 uint32_t keymgmt_set)
466 {
467 ieee80211_crypto_set_supported_driver_keymgmt(ic,
468 keymgmt_set);
469 }
470
471 struct ieee80211com *
ieee80211_find_com(const char * name)472 ieee80211_find_com(const char *name)
473 {
474 struct ieee80211com *ic;
475
476 mtx_lock(&ic_list_mtx);
477 LIST_FOREACH(ic, &ic_head, ic_next)
478 if (strcmp(ic->ic_name, name) == 0)
479 break;
480 mtx_unlock(&ic_list_mtx);
481
482 return (ic);
483 }
484
485 void
ieee80211_iterate_coms(ieee80211_com_iter_func * f,void * arg)486 ieee80211_iterate_coms(ieee80211_com_iter_func *f, void *arg)
487 {
488 struct ieee80211com *ic;
489
490 mtx_lock(&ic_list_mtx);
491 LIST_FOREACH(ic, &ic_head, ic_next)
492 (*f)(arg, ic);
493 mtx_unlock(&ic_list_mtx);
494 }
495
496 /*
497 * Default reset method for use with the ioctl support. This
498 * method is invoked after any state change in the 802.11
499 * layer that should be propagated to the hardware but not
500 * require re-initialization of the 802.11 state machine (e.g
501 * rescanning for an ap). We always return ENETRESET which
502 * should cause the driver to re-initialize the device. Drivers
503 * can override this method to implement more optimized support.
504 */
505 static int
default_reset(struct ieee80211vap * vap,u_long cmd)506 default_reset(struct ieee80211vap *vap, u_long cmd)
507 {
508 return ENETRESET;
509 }
510
511 /*
512 * Default for updating the VAP default TX key index.
513 *
514 * Drivers that support TX offload as well as hardware encryption offload
515 * may need to be informed of key index changes separate from the key
516 * update.
517 */
518 static void
default_update_deftxkey(struct ieee80211vap * vap,ieee80211_keyix kid)519 default_update_deftxkey(struct ieee80211vap *vap, ieee80211_keyix kid)
520 {
521
522 /* XXX assert validity */
523 /* XXX assert we're in a key update block */
524 vap->iv_def_txkey = kid;
525 }
526
527 /*
528 * Add underlying device errors to vap errors.
529 */
530 static uint64_t
ieee80211_get_counter(struct ifnet * ifp,ift_counter cnt)531 ieee80211_get_counter(struct ifnet *ifp, ift_counter cnt)
532 {
533 struct ieee80211vap *vap = ifp->if_softc;
534 struct ieee80211com *ic = vap->iv_ic;
535 uint64_t rv;
536
537 rv = if_get_counter_default(ifp, cnt);
538 switch (cnt) {
539 case IFCOUNTER_OERRORS:
540 rv += counter_u64_fetch(ic->ic_oerrors);
541 break;
542 case IFCOUNTER_IERRORS:
543 rv += counter_u64_fetch(ic->ic_ierrors);
544 break;
545 default:
546 break;
547 }
548
549 return (rv);
550 }
551
552 /*
553 * Prepare a vap for use. Drivers use this call to
554 * setup net80211 state in new vap's prior attaching
555 * them with ieee80211_vap_attach (below).
556 */
557 int
ieee80211_vap_setup(struct ieee80211com * ic,struct ieee80211vap * vap,const char name[IFNAMSIZ],int unit,enum ieee80211_opmode opmode,int flags,const uint8_t bssid[IEEE80211_ADDR_LEN])558 ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap,
559 const char name[IFNAMSIZ], int unit, enum ieee80211_opmode opmode,
560 int flags, const uint8_t bssid[IEEE80211_ADDR_LEN])
561 {
562 struct ifnet *ifp;
563
564 ifp = if_alloc(IFT_ETHER);
565 if (ifp == NULL) {
566 ic_printf(ic, "%s: unable to allocate ifnet\n", __func__);
567 return ENOMEM;
568 }
569 if_initname(ifp, name, unit);
570 ifp->if_softc = vap; /* back pointer */
571 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
572 ifp->if_transmit = ieee80211_vap_transmit;
573 ifp->if_qflush = ieee80211_vap_qflush;
574 ifp->if_ioctl = ieee80211_ioctl;
575 ifp->if_init = ieee80211_init;
576 ifp->if_get_counter = ieee80211_get_counter;
577
578 vap->iv_ifp = ifp;
579 vap->iv_ic = ic;
580 vap->iv_flags = ic->ic_flags; /* propagate common flags */
581 vap->iv_flags_ext = ic->ic_flags_ext;
582 vap->iv_flags_ven = ic->ic_flags_ven;
583 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE;
584
585 /* 11n capabilities - XXX methodize */
586 vap->iv_htcaps = ic->ic_htcaps;
587 vap->iv_htextcaps = ic->ic_htextcaps;
588
589 /* 11ac capabilities - XXX methodize */
590 vap->iv_vht_cap.vht_cap_info = ic->ic_vht_cap.vht_cap_info;
591 vap->iv_vhtextcaps = ic->ic_vhtextcaps;
592
593 vap->iv_opmode = opmode;
594 vap->iv_caps |= ieee80211_opcap[opmode];
595 IEEE80211_ADDR_COPY(vap->iv_myaddr, ic->ic_macaddr);
596 switch (opmode) {
597 case IEEE80211_M_WDS:
598 /*
599 * WDS links must specify the bssid of the far end.
600 * For legacy operation this is a static relationship.
601 * For non-legacy operation the station must associate
602 * and be authorized to pass traffic. Plumbing the
603 * vap to the proper node happens when the vap
604 * transitions to RUN state.
605 */
606 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid);
607 vap->iv_flags |= IEEE80211_F_DESBSSID;
608 if (flags & IEEE80211_CLONE_WDSLEGACY)
609 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY;
610 break;
611 #ifdef IEEE80211_SUPPORT_TDMA
612 case IEEE80211_M_AHDEMO:
613 if (flags & IEEE80211_CLONE_TDMA) {
614 /* NB: checked before clone operation allowed */
615 KASSERT(ic->ic_caps & IEEE80211_C_TDMA,
616 ("not TDMA capable, ic_caps 0x%x", ic->ic_caps));
617 /*
618 * Propagate TDMA capability to mark vap; this
619 * cannot be removed and is used to distinguish
620 * regular ahdemo operation from ahdemo+tdma.
621 */
622 vap->iv_caps |= IEEE80211_C_TDMA;
623 }
624 break;
625 #endif
626 default:
627 break;
628 }
629 /* auto-enable s/w beacon miss support */
630 if (flags & IEEE80211_CLONE_NOBEACONS)
631 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS;
632 /* auto-generated or user supplied MAC address */
633 if (flags & (IEEE80211_CLONE_BSSID|IEEE80211_CLONE_MACADDR))
634 vap->iv_flags_ext |= IEEE80211_FEXT_UNIQMAC;
635 /*
636 * Enable various functionality by default if we're
637 * capable; the driver can override us if it knows better.
638 */
639 if (vap->iv_caps & IEEE80211_C_WME)
640 vap->iv_flags |= IEEE80211_F_WME;
641 if (vap->iv_caps & IEEE80211_C_BURST)
642 vap->iv_flags |= IEEE80211_F_BURST;
643 /* NB: bg scanning only makes sense for station mode right now */
644 if (vap->iv_opmode == IEEE80211_M_STA &&
645 (vap->iv_caps & IEEE80211_C_BGSCAN))
646 vap->iv_flags |= IEEE80211_F_BGSCAN;
647 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */
648 /* NB: DFS support only makes sense for ap mode right now */
649 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
650 (vap->iv_caps & IEEE80211_C_DFS))
651 vap->iv_flags_ext |= IEEE80211_FEXT_DFS;
652 /* NB: only flip on U-APSD for hostap/sta for now */
653 if ((vap->iv_opmode == IEEE80211_M_STA)
654 || (vap->iv_opmode == IEEE80211_M_HOSTAP)) {
655 if (vap->iv_caps & IEEE80211_C_UAPSD)
656 vap->iv_flags_ext |= IEEE80211_FEXT_UAPSD;
657 }
658
659 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */
660 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT;
661 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT;
662 /*
663 * Install a default reset method for the ioctl support;
664 * the driver can override this.
665 */
666 vap->iv_reset = default_reset;
667
668 /*
669 * Install a default crypto key update method, the driver
670 * can override this.
671 */
672 vap->iv_update_deftxkey = default_update_deftxkey;
673
674 ieee80211_sysctl_vattach(vap);
675 ieee80211_crypto_vattach(vap);
676 ieee80211_node_vattach(vap);
677 ieee80211_power_vattach(vap);
678 ieee80211_proto_vattach(vap);
679 #ifdef IEEE80211_SUPPORT_SUPERG
680 ieee80211_superg_vattach(vap);
681 #endif
682 ieee80211_ht_vattach(vap);
683 ieee80211_vht_vattach(vap);
684 ieee80211_scan_vattach(vap);
685 ieee80211_regdomain_vattach(vap);
686 ieee80211_radiotap_vattach(vap);
687 ieee80211_vap_reset_erp(vap);
688 ieee80211_ratectl_set(vap, IEEE80211_RATECTL_NONE);
689
690 return 0;
691 }
692
693 /*
694 * Activate a vap. State should have been prepared with a
695 * call to ieee80211_vap_setup and by the driver. On return
696 * from this call the vap is ready for use.
697 */
698 int
ieee80211_vap_attach(struct ieee80211vap * vap,ifm_change_cb_t media_change,ifm_stat_cb_t media_stat,const uint8_t macaddr[IEEE80211_ADDR_LEN])699 ieee80211_vap_attach(struct ieee80211vap *vap, ifm_change_cb_t media_change,
700 ifm_stat_cb_t media_stat, const uint8_t macaddr[IEEE80211_ADDR_LEN])
701 {
702 struct ifnet *ifp = vap->iv_ifp;
703 struct ieee80211com *ic = vap->iv_ic;
704 struct ifmediareq imr;
705 int maxrate;
706
707 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
708 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n",
709 __func__, ieee80211_opmode_name[vap->iv_opmode],
710 ic->ic_name, vap->iv_flags, vap->iv_flags_ext);
711
712 /*
713 * Do late attach work that cannot happen until after
714 * the driver has had a chance to override defaults.
715 */
716 ieee80211_node_latevattach(vap);
717 ieee80211_power_latevattach(vap);
718
719 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps,
720 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat);
721 ieee80211_media_status(ifp, &imr);
722 /* NB: strip explicit mode; we're actually in autoselect */
723 ifmedia_set(&vap->iv_media,
724 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO));
725 if (maxrate)
726 ifp->if_baudrate = IF_Mbps(maxrate);
727
728 ether_ifattach(ifp, macaddr);
729 IEEE80211_ADDR_COPY(vap->iv_myaddr, IF_LLADDR(ifp));
730 /* hook output method setup by ether_ifattach */
731 vap->iv_output = ifp->if_output;
732 ifp->if_output = ieee80211_output;
733 /* NB: if_mtu set by ether_ifattach to ETHERMTU */
734
735 IEEE80211_LOCK(ic);
736 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next);
737 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
738 #ifdef IEEE80211_SUPPORT_SUPERG
739 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
740 #endif
741 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
742 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
743 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
744 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
745
746 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_VHT);
747 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT40);
748 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT80);
749 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT160);
750 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT80P80);
751 IEEE80211_UNLOCK(ic);
752
753 return 1;
754 }
755
756 /*
757 * Tear down vap state and reclaim the ifnet.
758 * The driver is assumed to have prepared for
759 * this; e.g. by turning off interrupts for the
760 * underlying device.
761 */
762 void
ieee80211_vap_detach(struct ieee80211vap * vap)763 ieee80211_vap_detach(struct ieee80211vap *vap)
764 {
765 struct ieee80211com *ic = vap->iv_ic;
766 struct ifnet *ifp = vap->iv_ifp;
767 int i;
768
769 CURVNET_SET(ifp->if_vnet);
770
771 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n",
772 __func__, ieee80211_opmode_name[vap->iv_opmode], ic->ic_name);
773
774 /* NB: bpfdetach is called by ether_ifdetach and claims all taps */
775 ether_ifdetach(ifp);
776
777 ieee80211_stop(vap);
778
779 /*
780 * Flush any deferred vap tasks.
781 */
782 for (i = 0; i < NET80211_IV_NSTATE_NUM; i++)
783 ieee80211_draintask(ic, &vap->iv_nstate_task[i]);
784 ieee80211_draintask(ic, &vap->iv_swbmiss_task);
785 ieee80211_draintask(ic, &vap->iv_wme_task);
786 ieee80211_draintask(ic, &ic->ic_parent_task);
787
788 /* XXX band-aid until ifnet handles this for us */
789 taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
790
791 IEEE80211_LOCK(ic);
792 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running"));
793 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next);
794 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
795 #ifdef IEEE80211_SUPPORT_SUPERG
796 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
797 #endif
798 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
799 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
800 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
801 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
802
803 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_VHT);
804 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT40);
805 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT80);
806 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT160);
807 ieee80211_syncflag_vht_locked(ic, IEEE80211_FVHT_USEVHT80P80);
808
809 /* NB: this handles the bpfdetach done below */
810 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF);
811 if (vap->iv_ifflags & IFF_PROMISC)
812 ieee80211_promisc(vap, false);
813 if (vap->iv_ifflags & IFF_ALLMULTI)
814 ieee80211_allmulti(vap, false);
815 IEEE80211_UNLOCK(ic);
816
817 ifmedia_removeall(&vap->iv_media);
818
819 ieee80211_radiotap_vdetach(vap);
820 ieee80211_regdomain_vdetach(vap);
821 ieee80211_scan_vdetach(vap);
822 #ifdef IEEE80211_SUPPORT_SUPERG
823 ieee80211_superg_vdetach(vap);
824 #endif
825 ieee80211_vht_vdetach(vap);
826 ieee80211_ht_vdetach(vap);
827 /* NB: must be before ieee80211_node_vdetach */
828 ieee80211_proto_vdetach(vap);
829 ieee80211_crypto_vdetach(vap);
830 ieee80211_power_vdetach(vap);
831 ieee80211_node_vdetach(vap);
832 ieee80211_sysctl_vdetach(vap);
833
834 if_free(ifp);
835
836 CURVNET_RESTORE();
837 }
838
839 /*
840 * Count number of vaps in promisc, and issue promisc on
841 * parent respectively.
842 */
843 void
ieee80211_promisc(struct ieee80211vap * vap,bool on)844 ieee80211_promisc(struct ieee80211vap *vap, bool on)
845 {
846 struct ieee80211com *ic = vap->iv_ic;
847
848 IEEE80211_LOCK_ASSERT(ic);
849
850 if (on) {
851 if (++ic->ic_promisc == 1)
852 ieee80211_runtask(ic, &ic->ic_promisc_task);
853 } else {
854 KASSERT(ic->ic_promisc > 0, ("%s: ic %p not promisc",
855 __func__, ic));
856 if (--ic->ic_promisc == 0)
857 ieee80211_runtask(ic, &ic->ic_promisc_task);
858 }
859 }
860
861 /*
862 * Count number of vaps in allmulti, and issue allmulti on
863 * parent respectively.
864 */
865 void
ieee80211_allmulti(struct ieee80211vap * vap,bool on)866 ieee80211_allmulti(struct ieee80211vap *vap, bool on)
867 {
868 struct ieee80211com *ic = vap->iv_ic;
869
870 IEEE80211_LOCK_ASSERT(ic);
871
872 if (on) {
873 if (++ic->ic_allmulti == 1)
874 ieee80211_runtask(ic, &ic->ic_mcast_task);
875 } else {
876 KASSERT(ic->ic_allmulti > 0, ("%s: ic %p not allmulti",
877 __func__, ic));
878 if (--ic->ic_allmulti == 0)
879 ieee80211_runtask(ic, &ic->ic_mcast_task);
880 }
881 }
882
883 /*
884 * Synchronize flag bit state in the com structure
885 * according to the state of all vap's. This is used,
886 * for example, to handle state changes via ioctls.
887 */
888 static void
ieee80211_syncflag_locked(struct ieee80211com * ic,int flag)889 ieee80211_syncflag_locked(struct ieee80211com *ic, int flag)
890 {
891 struct ieee80211vap *vap;
892 int bit;
893
894 IEEE80211_LOCK_ASSERT(ic);
895
896 bit = 0;
897 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
898 if (vap->iv_flags & flag) {
899 bit = 1;
900 break;
901 }
902 if (bit)
903 ic->ic_flags |= flag;
904 else
905 ic->ic_flags &= ~flag;
906 }
907
908 void
ieee80211_syncflag(struct ieee80211vap * vap,int flag)909 ieee80211_syncflag(struct ieee80211vap *vap, int flag)
910 {
911 struct ieee80211com *ic = vap->iv_ic;
912
913 IEEE80211_LOCK(ic);
914 if (flag < 0) {
915 flag = -flag;
916 vap->iv_flags &= ~flag;
917 } else
918 vap->iv_flags |= flag;
919 ieee80211_syncflag_locked(ic, flag);
920 IEEE80211_UNLOCK(ic);
921 }
922
923 /*
924 * Synchronize flags_ht bit state in the com structure
925 * according to the state of all vap's. This is used,
926 * for example, to handle state changes via ioctls.
927 */
928 static void
ieee80211_syncflag_ht_locked(struct ieee80211com * ic,int flag)929 ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag)
930 {
931 struct ieee80211vap *vap;
932 int bit;
933
934 IEEE80211_LOCK_ASSERT(ic);
935
936 bit = 0;
937 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
938 if (vap->iv_flags_ht & flag) {
939 bit = 1;
940 break;
941 }
942 if (bit)
943 ic->ic_flags_ht |= flag;
944 else
945 ic->ic_flags_ht &= ~flag;
946 }
947
948 void
ieee80211_syncflag_ht(struct ieee80211vap * vap,int flag)949 ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag)
950 {
951 struct ieee80211com *ic = vap->iv_ic;
952
953 IEEE80211_LOCK(ic);
954 if (flag < 0) {
955 flag = -flag;
956 vap->iv_flags_ht &= ~flag;
957 } else
958 vap->iv_flags_ht |= flag;
959 ieee80211_syncflag_ht_locked(ic, flag);
960 IEEE80211_UNLOCK(ic);
961 }
962
963 /*
964 * Synchronize flags_vht bit state in the com structure
965 * according to the state of all vap's. This is used,
966 * for example, to handle state changes via ioctls.
967 */
968 static void
ieee80211_syncflag_vht_locked(struct ieee80211com * ic,int flag)969 ieee80211_syncflag_vht_locked(struct ieee80211com *ic, int flag)
970 {
971 struct ieee80211vap *vap;
972 int bit;
973
974 IEEE80211_LOCK_ASSERT(ic);
975
976 bit = 0;
977 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
978 if (vap->iv_vht_flags & flag) {
979 bit = 1;
980 break;
981 }
982 if (bit)
983 ic->ic_vht_flags |= flag;
984 else
985 ic->ic_vht_flags &= ~flag;
986 }
987
988 void
ieee80211_syncflag_vht(struct ieee80211vap * vap,int flag)989 ieee80211_syncflag_vht(struct ieee80211vap *vap, int flag)
990 {
991 struct ieee80211com *ic = vap->iv_ic;
992
993 IEEE80211_LOCK(ic);
994 if (flag < 0) {
995 flag = -flag;
996 vap->iv_vht_flags &= ~flag;
997 } else
998 vap->iv_vht_flags |= flag;
999 ieee80211_syncflag_vht_locked(ic, flag);
1000 IEEE80211_UNLOCK(ic);
1001 }
1002
1003 /*
1004 * Synchronize flags_ext bit state in the com structure
1005 * according to the state of all vap's. This is used,
1006 * for example, to handle state changes via ioctls.
1007 */
1008 static void
ieee80211_syncflag_ext_locked(struct ieee80211com * ic,int flag)1009 ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag)
1010 {
1011 struct ieee80211vap *vap;
1012 int bit;
1013
1014 IEEE80211_LOCK_ASSERT(ic);
1015
1016 bit = 0;
1017 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
1018 if (vap->iv_flags_ext & flag) {
1019 bit = 1;
1020 break;
1021 }
1022 if (bit)
1023 ic->ic_flags_ext |= flag;
1024 else
1025 ic->ic_flags_ext &= ~flag;
1026 }
1027
1028 void
ieee80211_syncflag_ext(struct ieee80211vap * vap,int flag)1029 ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag)
1030 {
1031 struct ieee80211com *ic = vap->iv_ic;
1032
1033 IEEE80211_LOCK(ic);
1034 if (flag < 0) {
1035 flag = -flag;
1036 vap->iv_flags_ext &= ~flag;
1037 } else
1038 vap->iv_flags_ext |= flag;
1039 ieee80211_syncflag_ext_locked(ic, flag);
1040 IEEE80211_UNLOCK(ic);
1041 }
1042
1043 static __inline int
mapgsm(u_int freq,u_int flags)1044 mapgsm(u_int freq, u_int flags)
1045 {
1046 freq *= 10;
1047 if (flags & IEEE80211_CHAN_QUARTER)
1048 freq += 5;
1049 else if (flags & IEEE80211_CHAN_HALF)
1050 freq += 10;
1051 else
1052 freq += 20;
1053 /* NB: there is no 907/20 wide but leave room */
1054 return (freq - 906*10) / 5;
1055 }
1056
1057 static __inline int
mappsb(u_int freq,u_int flags)1058 mappsb(u_int freq, u_int flags)
1059 {
1060 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5;
1061 }
1062
1063 /*
1064 * Convert MHz frequency to IEEE channel number.
1065 */
1066 int
ieee80211_mhz2ieee(u_int freq,u_int flags)1067 ieee80211_mhz2ieee(u_int freq, u_int flags)
1068 {
1069 #define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990)
1070 if (flags & IEEE80211_CHAN_GSM)
1071 return mapgsm(freq, flags);
1072 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
1073 if (freq == 2484)
1074 return 14;
1075 if (freq < 2484)
1076 return ((int) freq - 2407) / 5;
1077 else
1078 return 15 + ((freq - 2512) / 20);
1079 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */
1080 if (freq <= 5000) {
1081 /* XXX check regdomain? */
1082 if (IS_FREQ_IN_PSB(freq))
1083 return mappsb(freq, flags);
1084 return (freq - 4000) / 5;
1085 } else
1086 return (freq - 5000) / 5;
1087 } else { /* either, guess */
1088 if (freq == 2484)
1089 return 14;
1090 if (freq < 2484) {
1091 if (907 <= freq && freq <= 922)
1092 return mapgsm(freq, flags);
1093 return ((int) freq - 2407) / 5;
1094 }
1095 if (freq < 5000) {
1096 if (IS_FREQ_IN_PSB(freq))
1097 return mappsb(freq, flags);
1098 else if (freq > 4900)
1099 return (freq - 4000) / 5;
1100 else
1101 return 15 + ((freq - 2512) / 20);
1102 }
1103 return (freq - 5000) / 5;
1104 }
1105 #undef IS_FREQ_IN_PSB
1106 }
1107
1108 /*
1109 * Convert channel to IEEE channel number.
1110 */
1111 int
ieee80211_chan2ieee(struct ieee80211com * ic,const struct ieee80211_channel * c)1112 ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c)
1113 {
1114 if (c == NULL) {
1115 ic_printf(ic, "invalid channel (NULL)\n");
1116 return 0; /* XXX */
1117 }
1118 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee);
1119 }
1120
1121 /*
1122 * Convert IEEE channel number to MHz frequency.
1123 */
1124 u_int
ieee80211_ieee2mhz(u_int chan,u_int flags)1125 ieee80211_ieee2mhz(u_int chan, u_int flags)
1126 {
1127 if (flags & IEEE80211_CHAN_GSM)
1128 return 907 + 5 * (chan / 10);
1129 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
1130 if (chan == 14)
1131 return 2484;
1132 if (chan < 14)
1133 return 2407 + chan*5;
1134 else
1135 return 2512 + ((chan-15)*20);
1136 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */
1137 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) {
1138 chan -= 37;
1139 return 4940 + chan*5 + (chan % 5 ? 2 : 0);
1140 }
1141 return 5000 + (chan*5);
1142 } else { /* either, guess */
1143 /* XXX can't distinguish PSB+GSM channels */
1144 if (chan == 14)
1145 return 2484;
1146 if (chan < 14) /* 0-13 */
1147 return 2407 + chan*5;
1148 if (chan < 27) /* 15-26 */
1149 return 2512 + ((chan-15)*20);
1150 return 5000 + (chan*5);
1151 }
1152 }
1153
1154 static __inline void
set_extchan(struct ieee80211_channel * c)1155 set_extchan(struct ieee80211_channel *c)
1156 {
1157
1158 /*
1159 * IEEE Std 802.11-2012, page 1738, subclause 20.3.15.4:
1160 * "the secondary channel number shall be 'N + [1,-1] * 4'
1161 */
1162 if (c->ic_flags & IEEE80211_CHAN_HT40U)
1163 c->ic_extieee = c->ic_ieee + 4;
1164 else if (c->ic_flags & IEEE80211_CHAN_HT40D)
1165 c->ic_extieee = c->ic_ieee - 4;
1166 else
1167 c->ic_extieee = 0;
1168 }
1169
1170 /*
1171 * Populate the freq1/freq2 fields as appropriate for VHT channels.
1172 *
1173 * This for now uses a hard-coded list of 80MHz wide channels.
1174 *
1175 * For HT20/HT40, freq1 just is the centre frequency of the 40MHz
1176 * wide channel we've already decided upon.
1177 *
1178 * For VHT80 and VHT160, there are only a small number of fixed
1179 * 80/160MHz wide channels, so we just use those.
1180 *
1181 * This is all likely very very wrong - both the regulatory code
1182 * and this code needs to ensure that all four channels are
1183 * available and valid before the VHT80 (and eight for VHT160) channel
1184 * is created.
1185 */
1186
1187 struct vht_chan_range {
1188 uint16_t freq_start;
1189 uint16_t freq_end;
1190 };
1191
1192 struct vht_chan_range vht80_chan_ranges[] = {
1193 { 5170, 5250 },
1194 { 5250, 5330 },
1195 { 5490, 5570 },
1196 { 5570, 5650 },
1197 { 5650, 5730 },
1198 { 5735, 5815 },
1199 { 0, 0 }
1200 };
1201
1202 struct vht_chan_range vht160_chan_ranges[] = {
1203 { 5170, 5330 },
1204 { 5490, 5650 },
1205 { 0, 0 }
1206 };
1207
1208 static int
set_vht_extchan(struct ieee80211_channel * c)1209 set_vht_extchan(struct ieee80211_channel *c)
1210 {
1211 int i;
1212
1213 if (! IEEE80211_IS_CHAN_VHT(c))
1214 return (0);
1215
1216 if (IEEE80211_IS_CHAN_VHT80P80(c)) {
1217 printf("%s: TODO VHT80+80 channel (ieee=%d, flags=0x%08x)\n",
1218 __func__, c->ic_ieee, c->ic_flags);
1219 }
1220
1221 if (IEEE80211_IS_CHAN_VHT160(c)) {
1222 for (i = 0; vht160_chan_ranges[i].freq_start != 0; i++) {
1223 if (c->ic_freq >= vht160_chan_ranges[i].freq_start &&
1224 c->ic_freq < vht160_chan_ranges[i].freq_end) {
1225 int midpoint;
1226
1227 midpoint = vht160_chan_ranges[i].freq_start + 80;
1228 c->ic_vht_ch_freq1 =
1229 ieee80211_mhz2ieee(midpoint, c->ic_flags);
1230 c->ic_vht_ch_freq2 = 0;
1231 #if 0
1232 printf("%s: %d, freq=%d, midpoint=%d, freq1=%d, freq2=%d\n",
1233 __func__, c->ic_ieee, c->ic_freq, midpoint,
1234 c->ic_vht_ch_freq1, c->ic_vht_ch_freq2);
1235 #endif
1236 return (1);
1237 }
1238 }
1239 return (0);
1240 }
1241
1242 if (IEEE80211_IS_CHAN_VHT80(c)) {
1243 for (i = 0; vht80_chan_ranges[i].freq_start != 0; i++) {
1244 if (c->ic_freq >= vht80_chan_ranges[i].freq_start &&
1245 c->ic_freq < vht80_chan_ranges[i].freq_end) {
1246 int midpoint;
1247
1248 midpoint = vht80_chan_ranges[i].freq_start + 40;
1249 c->ic_vht_ch_freq1 =
1250 ieee80211_mhz2ieee(midpoint, c->ic_flags);
1251 c->ic_vht_ch_freq2 = 0;
1252 #if 0
1253 printf("%s: %d, freq=%d, midpoint=%d, freq1=%d, freq2=%d\n",
1254 __func__, c->ic_ieee, c->ic_freq, midpoint,
1255 c->ic_vht_ch_freq1, c->ic_vht_ch_freq2);
1256 #endif
1257 return (1);
1258 }
1259 }
1260 return (0);
1261 }
1262
1263 if (IEEE80211_IS_CHAN_VHT40(c)) {
1264 if (IEEE80211_IS_CHAN_HT40U(c))
1265 c->ic_vht_ch_freq1 = c->ic_ieee + 2;
1266 else if (IEEE80211_IS_CHAN_HT40D(c))
1267 c->ic_vht_ch_freq1 = c->ic_ieee - 2;
1268 else
1269 return (0);
1270 return (1);
1271 }
1272
1273 if (IEEE80211_IS_CHAN_VHT20(c)) {
1274 c->ic_vht_ch_freq1 = c->ic_ieee;
1275 return (1);
1276 }
1277
1278 printf("%s: unknown VHT channel type (ieee=%d, flags=0x%08x)\n",
1279 __func__, c->ic_ieee, c->ic_flags);
1280
1281 return (0);
1282 }
1283
1284 /*
1285 * Return whether the current channel could possibly be a part of
1286 * a VHT80/VHT160 channel.
1287 *
1288 * This doesn't check that the whole range is in the allowed list
1289 * according to regulatory.
1290 */
1291 static bool
is_vht160_valid_freq(uint16_t freq)1292 is_vht160_valid_freq(uint16_t freq)
1293 {
1294 int i;
1295
1296 for (i = 0; vht160_chan_ranges[i].freq_start != 0; i++) {
1297 if (freq >= vht160_chan_ranges[i].freq_start &&
1298 freq < vht160_chan_ranges[i].freq_end)
1299 return (true);
1300 }
1301 return (false);
1302 }
1303
1304 static int
is_vht80_valid_freq(uint16_t freq)1305 is_vht80_valid_freq(uint16_t freq)
1306 {
1307 int i;
1308 for (i = 0; vht80_chan_ranges[i].freq_start != 0; i++) {
1309 if (freq >= vht80_chan_ranges[i].freq_start &&
1310 freq < vht80_chan_ranges[i].freq_end)
1311 return (1);
1312 }
1313 return (0);
1314 }
1315
1316 static int
addchan(struct ieee80211_channel chans[],int maxchans,int * nchans,uint8_t ieee,uint16_t freq,int8_t maxregpower,uint32_t flags)1317 addchan(struct ieee80211_channel chans[], int maxchans, int *nchans,
1318 uint8_t ieee, uint16_t freq, int8_t maxregpower, uint32_t flags)
1319 {
1320 struct ieee80211_channel *c;
1321
1322 if (*nchans >= maxchans)
1323 return (ENOBUFS);
1324
1325 #if 0
1326 printf("%s: %d of %d: ieee=%d, freq=%d, flags=0x%08x\n",
1327 __func__, *nchans, maxchans, ieee, freq, flags);
1328 #endif
1329
1330 c = &chans[(*nchans)++];
1331 c->ic_ieee = ieee;
1332 c->ic_freq = freq != 0 ? freq : ieee80211_ieee2mhz(ieee, flags);
1333 c->ic_maxregpower = maxregpower;
1334 c->ic_maxpower = 2 * maxregpower;
1335 c->ic_flags = flags;
1336 c->ic_vht_ch_freq1 = 0;
1337 c->ic_vht_ch_freq2 = 0;
1338 set_extchan(c);
1339 set_vht_extchan(c);
1340
1341 return (0);
1342 }
1343
1344 static int
copychan_prev(struct ieee80211_channel chans[],int maxchans,int * nchans,uint32_t flags)1345 copychan_prev(struct ieee80211_channel chans[], int maxchans, int *nchans,
1346 uint32_t flags)
1347 {
1348 struct ieee80211_channel *c;
1349
1350 KASSERT(*nchans > 0, ("channel list is empty\n"));
1351
1352 if (*nchans >= maxchans)
1353 return (ENOBUFS);
1354
1355 #if 0
1356 printf("%s: %d of %d: flags=0x%08x\n",
1357 __func__, *nchans, maxchans, flags);
1358 #endif
1359
1360 c = &chans[(*nchans)++];
1361 c[0] = c[-1];
1362 c->ic_flags = flags;
1363 c->ic_vht_ch_freq1 = 0;
1364 c->ic_vht_ch_freq2 = 0;
1365 set_extchan(c);
1366 set_vht_extchan(c);
1367
1368 return (0);
1369 }
1370
1371 /*
1372 * XXX VHT-2GHz
1373 */
1374 static void
getflags_2ghz(const uint8_t bands[],uint32_t flags[],int cbw_flags)1375 getflags_2ghz(const uint8_t bands[], uint32_t flags[], int cbw_flags)
1376 {
1377 int nmodes;
1378
1379 nmodes = 0;
1380 if (isset(bands, IEEE80211_MODE_11B))
1381 flags[nmodes++] = IEEE80211_CHAN_B;
1382 if (isset(bands, IEEE80211_MODE_11G))
1383 flags[nmodes++] = IEEE80211_CHAN_G;
1384 if (isset(bands, IEEE80211_MODE_11NG))
1385 flags[nmodes++] = IEEE80211_CHAN_G | IEEE80211_CHAN_HT20;
1386 if (cbw_flags & NET80211_CBW_FLAG_HT40) {
1387 flags[nmodes++] = IEEE80211_CHAN_G | IEEE80211_CHAN_HT40U;
1388 flags[nmodes++] = IEEE80211_CHAN_G | IEEE80211_CHAN_HT40D;
1389 }
1390 flags[nmodes] = 0;
1391 }
1392
1393 static void
getflags_5ghz(const uint8_t bands[],uint32_t flags[],int cbw_flags)1394 getflags_5ghz(const uint8_t bands[], uint32_t flags[], int cbw_flags)
1395 {
1396 int nmodes;
1397
1398 /*
1399 * The addchan_list() function seems to expect the flags array to
1400 * be in channel width order, so the VHT bits are interspersed
1401 * as appropriate to maintain said order.
1402 *
1403 * It also assumes HT40U is before HT40D.
1404 */
1405 nmodes = 0;
1406
1407 /* 20MHz */
1408 if (isset(bands, IEEE80211_MODE_11A))
1409 flags[nmodes++] = IEEE80211_CHAN_A;
1410 if (isset(bands, IEEE80211_MODE_11NA))
1411 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT20;
1412 if (isset(bands, IEEE80211_MODE_VHT_5GHZ)) {
1413 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT20 |
1414 IEEE80211_CHAN_VHT20;
1415 }
1416
1417 /* 40MHz */
1418 if (cbw_flags & NET80211_CBW_FLAG_HT40)
1419 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40U;
1420 if ((cbw_flags & NET80211_CBW_FLAG_HT40) &&
1421 isset(bands, IEEE80211_MODE_VHT_5GHZ))
1422 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40U |
1423 IEEE80211_CHAN_VHT40U;
1424 if (cbw_flags & NET80211_CBW_FLAG_HT40)
1425 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40D;
1426 if ((cbw_flags & NET80211_CBW_FLAG_HT40) &&
1427 isset(bands, IEEE80211_MODE_VHT_5GHZ))
1428 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40D |
1429 IEEE80211_CHAN_VHT40D;
1430
1431 /* 80MHz */
1432 if ((cbw_flags & NET80211_CBW_FLAG_VHT80) &&
1433 isset(bands, IEEE80211_MODE_VHT_5GHZ)) {
1434 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40U |
1435 IEEE80211_CHAN_VHT80;
1436 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40D |
1437 IEEE80211_CHAN_VHT80;
1438 }
1439
1440 /* VHT160 */
1441 if ((cbw_flags & NET80211_CBW_FLAG_VHT160) &&
1442 isset(bands, IEEE80211_MODE_VHT_5GHZ)) {
1443 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40U |
1444 IEEE80211_CHAN_VHT160;
1445 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40D |
1446 IEEE80211_CHAN_VHT160;
1447 }
1448
1449 /* VHT80+80 */
1450 if ((cbw_flags & NET80211_CBW_FLAG_VHT80P80) &&
1451 isset(bands, IEEE80211_MODE_VHT_5GHZ)) {
1452 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40U |
1453 IEEE80211_CHAN_VHT80P80;
1454 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40D |
1455 IEEE80211_CHAN_VHT80P80;
1456 }
1457
1458 flags[nmodes] = 0;
1459 }
1460
1461 static void
getflags(const uint8_t bands[],uint32_t flags[],int cbw_flags)1462 getflags(const uint8_t bands[], uint32_t flags[], int cbw_flags)
1463 {
1464
1465 flags[0] = 0;
1466 if (isset(bands, IEEE80211_MODE_11A) ||
1467 isset(bands, IEEE80211_MODE_11NA) ||
1468 isset(bands, IEEE80211_MODE_VHT_5GHZ)) {
1469 if (isset(bands, IEEE80211_MODE_11B) ||
1470 isset(bands, IEEE80211_MODE_11G) ||
1471 isset(bands, IEEE80211_MODE_11NG) ||
1472 isset(bands, IEEE80211_MODE_VHT_2GHZ))
1473 return;
1474
1475 getflags_5ghz(bands, flags, cbw_flags);
1476 } else
1477 getflags_2ghz(bands, flags, cbw_flags);
1478 }
1479
1480 /*
1481 * Add one 20 MHz channel into specified channel list.
1482 * You MUST NOT mix bands when calling this. It will not add 5ghz
1483 * channels if you have any B/G/N band bit set.
1484 * The _cbw() variant does also support HT40/VHT80/160/80+80.
1485 */
1486 int
ieee80211_add_channel_cbw(struct ieee80211_channel chans[],int maxchans,int * nchans,uint8_t ieee,uint16_t freq,int8_t maxregpower,uint32_t chan_flags,const uint8_t bands[],int cbw_flags)1487 ieee80211_add_channel_cbw(struct ieee80211_channel chans[], int maxchans,
1488 int *nchans, uint8_t ieee, uint16_t freq, int8_t maxregpower,
1489 uint32_t chan_flags, const uint8_t bands[], int cbw_flags)
1490 {
1491 uint32_t flags[IEEE80211_MODE_MAX];
1492 int i, error;
1493
1494 getflags(bands, flags, cbw_flags);
1495 KASSERT(flags[0] != 0, ("%s: no correct mode provided\n", __func__));
1496
1497 error = addchan(chans, maxchans, nchans, ieee, freq, maxregpower,
1498 flags[0] | chan_flags);
1499 for (i = 1; flags[i] != 0 && error == 0; i++) {
1500 error = copychan_prev(chans, maxchans, nchans,
1501 flags[i] | chan_flags);
1502 }
1503
1504 return (error);
1505 }
1506
1507 int
ieee80211_add_channel(struct ieee80211_channel chans[],int maxchans,int * nchans,uint8_t ieee,uint16_t freq,int8_t maxregpower,uint32_t chan_flags,const uint8_t bands[])1508 ieee80211_add_channel(struct ieee80211_channel chans[], int maxchans,
1509 int *nchans, uint8_t ieee, uint16_t freq, int8_t maxregpower,
1510 uint32_t chan_flags, const uint8_t bands[])
1511 {
1512
1513 return (ieee80211_add_channel_cbw(chans, maxchans, nchans, ieee, freq,
1514 maxregpower, chan_flags, bands, 0));
1515 }
1516
1517 static struct ieee80211_channel *
findchannel(struct ieee80211_channel chans[],int nchans,uint16_t freq,uint32_t flags)1518 findchannel(struct ieee80211_channel chans[], int nchans, uint16_t freq,
1519 uint32_t flags)
1520 {
1521 struct ieee80211_channel *c;
1522 int i;
1523
1524 flags &= IEEE80211_CHAN_ALLTURBO;
1525 /* brute force search */
1526 for (i = 0; i < nchans; i++) {
1527 c = &chans[i];
1528 if (c->ic_freq == freq &&
1529 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
1530 return c;
1531 }
1532 return NULL;
1533 }
1534
1535 /*
1536 * Add 40 MHz channel pair into specified channel list.
1537 */
1538 /* XXX VHT */
1539 int
ieee80211_add_channel_ht40(struct ieee80211_channel chans[],int maxchans,int * nchans,uint8_t ieee,int8_t maxregpower,uint32_t flags)1540 ieee80211_add_channel_ht40(struct ieee80211_channel chans[], int maxchans,
1541 int *nchans, uint8_t ieee, int8_t maxregpower, uint32_t flags)
1542 {
1543 struct ieee80211_channel *cent, *extc;
1544 uint16_t freq;
1545 int error;
1546
1547 freq = ieee80211_ieee2mhz(ieee, flags);
1548
1549 /*
1550 * Each entry defines an HT40 channel pair; find the
1551 * center channel, then the extension channel above.
1552 */
1553 flags |= IEEE80211_CHAN_HT20;
1554 cent = findchannel(chans, *nchans, freq, flags);
1555 if (cent == NULL)
1556 return (EINVAL);
1557
1558 extc = findchannel(chans, *nchans, freq + 20, flags);
1559 if (extc == NULL)
1560 return (ENOENT);
1561
1562 flags &= ~IEEE80211_CHAN_HT;
1563 error = addchan(chans, maxchans, nchans, cent->ic_ieee, cent->ic_freq,
1564 maxregpower, flags | IEEE80211_CHAN_HT40U);
1565 if (error != 0)
1566 return (error);
1567
1568 error = addchan(chans, maxchans, nchans, extc->ic_ieee, extc->ic_freq,
1569 maxregpower, flags | IEEE80211_CHAN_HT40D);
1570
1571 return (error);
1572 }
1573
1574 /*
1575 * Fetch the center frequency for the primary channel.
1576 */
1577 uint32_t
ieee80211_get_channel_center_freq(const struct ieee80211_channel * c)1578 ieee80211_get_channel_center_freq(const struct ieee80211_channel *c)
1579 {
1580
1581 return (c->ic_freq);
1582 }
1583
1584 /*
1585 * Fetch the center frequency for the primary BAND channel.
1586 *
1587 * For 5, 10, 20MHz channels it'll be the normally configured channel
1588 * frequency.
1589 *
1590 * For 40MHz, 80MHz, 160MHz channels it will be the centre of the
1591 * wide channel, not the centre of the primary channel (that's ic_freq).
1592 *
1593 * For 80+80MHz channels this will be the centre of the primary
1594 * 80MHz channel; the secondary 80MHz channel will be center_freq2().
1595 */
1596 uint32_t
ieee80211_get_channel_center_freq1(const struct ieee80211_channel * c)1597 ieee80211_get_channel_center_freq1(const struct ieee80211_channel *c)
1598 {
1599
1600 /*
1601 * VHT - use the pre-calculated centre frequency
1602 * of the given channel.
1603 */
1604 if (IEEE80211_IS_CHAN_VHT(c))
1605 return (ieee80211_ieee2mhz(c->ic_vht_ch_freq1, c->ic_flags));
1606
1607 if (IEEE80211_IS_CHAN_HT40U(c)) {
1608 return (c->ic_freq + 10);
1609 }
1610 if (IEEE80211_IS_CHAN_HT40D(c)) {
1611 return (c->ic_freq - 10);
1612 }
1613
1614 return (c->ic_freq);
1615 }
1616
1617 /*
1618 * For now, no 80+80 support; it will likely always return 0.
1619 */
1620 uint32_t
ieee80211_get_channel_center_freq2(const struct ieee80211_channel * c)1621 ieee80211_get_channel_center_freq2(const struct ieee80211_channel *c)
1622 {
1623
1624 if (IEEE80211_IS_CHAN_VHT(c) && (c->ic_vht_ch_freq2 != 0))
1625 return (ieee80211_ieee2mhz(c->ic_vht_ch_freq2, c->ic_flags));
1626
1627 return (0);
1628 }
1629
1630 /*
1631 * Adds channels into specified channel list (ieee[] array must be sorted).
1632 * Channels are already sorted.
1633 */
1634 static int
add_chanlist(struct ieee80211_channel chans[],int maxchans,int * nchans,const uint8_t ieee[],int nieee,uint32_t flags[])1635 add_chanlist(struct ieee80211_channel chans[], int maxchans, int *nchans,
1636 const uint8_t ieee[], int nieee, uint32_t flags[])
1637 {
1638 uint16_t freq;
1639 int i, j, error;
1640 int is_vht;
1641
1642 for (i = 0; i < nieee; i++) {
1643 freq = ieee80211_ieee2mhz(ieee[i], flags[0]);
1644 for (j = 0; flags[j] != 0; j++) {
1645 /*
1646 * Notes:
1647 * + HT40 and VHT40 channels occur together, so
1648 * we need to be careful that we actually allow that.
1649 * + VHT80, VHT160 will coexist with HT40/VHT40, so
1650 * make sure it's not skipped because of the overlap
1651 * check used for (V)HT40.
1652 */
1653 is_vht = !! (flags[j] & IEEE80211_CHAN_VHT);
1654
1655 /* XXX TODO FIXME VHT80P80. */
1656
1657 /* Test for VHT160 analogue to the VHT80 below. */
1658 if (is_vht && flags[j] & IEEE80211_CHAN_VHT160)
1659 if (! is_vht160_valid_freq(freq))
1660 continue;
1661
1662 /*
1663 * Test for VHT80.
1664 * XXX This is all very broken right now.
1665 * What we /should/ do is:
1666 *
1667 * + check that the frequency is in the list of
1668 * allowed VHT80 ranges; and
1669 * + the other 3 channels in the list are actually
1670 * also available.
1671 */
1672 if (is_vht && flags[j] & IEEE80211_CHAN_VHT80)
1673 if (! is_vht80_valid_freq(freq))
1674 continue;
1675
1676 /*
1677 * Test for (V)HT40.
1678 *
1679 * This is also a fall through from VHT80; as we only
1680 * allow a VHT80 channel if the VHT40 combination is
1681 * also valid. If the VHT40 form is not valid then
1682 * we certainly can't do VHT80..
1683 */
1684 if (flags[j] & IEEE80211_CHAN_HT40D)
1685 /*
1686 * Can't have a "lower" channel if we are the
1687 * first channel.
1688 *
1689 * Can't have a "lower" channel if it's below/
1690 * within 20MHz of the first channel.
1691 *
1692 * Can't have a "lower" channel if the channel
1693 * below it is not 20MHz away.
1694 */
1695 if (i == 0 || ieee[i] < ieee[0] + 4 ||
1696 freq - 20 !=
1697 ieee80211_ieee2mhz(ieee[i] - 4, flags[j]))
1698 continue;
1699 if (flags[j] & IEEE80211_CHAN_HT40U)
1700 /*
1701 * Can't have an "upper" channel if we are
1702 * the last channel.
1703 *
1704 * Can't have an "upper" channel be above the
1705 * last channel in the list.
1706 *
1707 * Can't have an "upper" channel if the next
1708 * channel according to the math isn't 20MHz
1709 * away. (Likely for channel 13/14.)
1710 */
1711 if (i == nieee - 1 ||
1712 ieee[i] + 4 > ieee[nieee - 1] ||
1713 freq + 20 !=
1714 ieee80211_ieee2mhz(ieee[i] + 4, flags[j]))
1715 continue;
1716
1717 if (j == 0) {
1718 error = addchan(chans, maxchans, nchans,
1719 ieee[i], freq, 0, flags[j]);
1720 } else {
1721 error = copychan_prev(chans, maxchans, nchans,
1722 flags[j]);
1723 }
1724 if (error != 0)
1725 return (error);
1726 }
1727 }
1728
1729 return (0);
1730 }
1731
1732 int
ieee80211_add_channel_list_2ghz(struct ieee80211_channel chans[],int maxchans,int * nchans,const uint8_t ieee[],int nieee,const uint8_t bands[],int cbw_flags)1733 ieee80211_add_channel_list_2ghz(struct ieee80211_channel chans[], int maxchans,
1734 int *nchans, const uint8_t ieee[], int nieee, const uint8_t bands[],
1735 int cbw_flags)
1736 {
1737 uint32_t flags[IEEE80211_MODE_MAX];
1738
1739 /* XXX no VHT for now */
1740 getflags_2ghz(bands, flags, cbw_flags);
1741 KASSERT(flags[0] != 0, ("%s: no correct mode provided\n", __func__));
1742
1743 return (add_chanlist(chans, maxchans, nchans, ieee, nieee, flags));
1744 }
1745
1746 int
ieee80211_add_channels_default_2ghz(struct ieee80211_channel chans[],int maxchans,int * nchans,const uint8_t bands[],int cbw_flags)1747 ieee80211_add_channels_default_2ghz(struct ieee80211_channel chans[],
1748 int maxchans, int *nchans, const uint8_t bands[], int cbw_flags)
1749 {
1750 const uint8_t default_chan_list[] =
1751 { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 };
1752
1753 return (ieee80211_add_channel_list_2ghz(chans, maxchans, nchans,
1754 default_chan_list, nitems(default_chan_list), bands, cbw_flags));
1755 }
1756
1757 int
ieee80211_add_channel_list_5ghz(struct ieee80211_channel chans[],int maxchans,int * nchans,const uint8_t ieee[],int nieee,const uint8_t bands[],int cbw_flags)1758 ieee80211_add_channel_list_5ghz(struct ieee80211_channel chans[], int maxchans,
1759 int *nchans, const uint8_t ieee[], int nieee, const uint8_t bands[],
1760 int cbw_flags)
1761 {
1762 /*
1763 * XXX-BZ with HT and VHT there is no 1:1 mapping anymore. Review all
1764 * uses of IEEE80211_MODE_MAX and add a new #define name for array size.
1765 */
1766 uint32_t flags[2 * IEEE80211_MODE_MAX];
1767
1768 getflags_5ghz(bands, flags, cbw_flags);
1769 KASSERT(flags[0] != 0, ("%s: no correct mode provided\n", __func__));
1770
1771 return (add_chanlist(chans, maxchans, nchans, ieee, nieee, flags));
1772 }
1773
1774 /*
1775 * Locate a channel given a frequency+flags. We cache
1776 * the previous lookup to optimize switching between two
1777 * channels--as happens with dynamic turbo.
1778 */
1779 struct ieee80211_channel *
ieee80211_find_channel(struct ieee80211com * ic,int freq,int flags)1780 ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags)
1781 {
1782 struct ieee80211_channel *c;
1783
1784 flags &= IEEE80211_CHAN_ALLTURBO;
1785 c = ic->ic_prevchan;
1786 if (c != NULL && c->ic_freq == freq &&
1787 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
1788 return c;
1789 /* brute force search */
1790 return (findchannel(ic->ic_channels, ic->ic_nchans, freq, flags));
1791 }
1792
1793 /*
1794 * Locate a channel given a channel number+flags. We cache
1795 * the previous lookup to optimize switching between two
1796 * channels--as happens with dynamic turbo.
1797 */
1798 struct ieee80211_channel *
ieee80211_find_channel_byieee(struct ieee80211com * ic,int ieee,int flags)1799 ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags)
1800 {
1801 struct ieee80211_channel *c;
1802 int i;
1803
1804 flags &= IEEE80211_CHAN_ALLTURBO;
1805 c = ic->ic_prevchan;
1806 if (c != NULL && c->ic_ieee == ieee &&
1807 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
1808 return c;
1809 /* brute force search */
1810 for (i = 0; i < ic->ic_nchans; i++) {
1811 c = &ic->ic_channels[i];
1812 if (c->ic_ieee == ieee &&
1813 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
1814 return c;
1815 }
1816 return NULL;
1817 }
1818
1819 /*
1820 * Lookup a channel suitable for the given rx status.
1821 *
1822 * This is used to find a channel for a frame (eg beacon, probe
1823 * response) based purely on the received PHY information.
1824 *
1825 * For now it tries to do it based on R_FREQ / R_IEEE.
1826 * This is enough for 11bg and 11a (and thus 11ng/11na)
1827 * but it will not be enough for GSM, PSB channels and the
1828 * like. It also doesn't know about legacy-turbog and
1829 * legacy-turbo modes, which some offload NICs actually
1830 * support in weird ways.
1831 *
1832 * Takes the ic and rxstatus; returns the channel or NULL
1833 * if not found.
1834 *
1835 * XXX TODO: Add support for that when the need arises.
1836 */
1837 struct ieee80211_channel *
ieee80211_lookup_channel_rxstatus(struct ieee80211vap * vap,const struct ieee80211_rx_stats * rxs)1838 ieee80211_lookup_channel_rxstatus(struct ieee80211vap *vap,
1839 const struct ieee80211_rx_stats *rxs)
1840 {
1841 struct ieee80211com *ic = vap->iv_ic;
1842 uint32_t flags;
1843 struct ieee80211_channel *c;
1844
1845 if (rxs == NULL)
1846 return (NULL);
1847
1848 /*
1849 * Strictly speaking we only use freq for now,
1850 * however later on we may wish to just store
1851 * the ieee for verification.
1852 */
1853 if ((rxs->r_flags & IEEE80211_R_FREQ) == 0)
1854 return (NULL);
1855 if ((rxs->r_flags & IEEE80211_R_IEEE) == 0)
1856 return (NULL);
1857 if ((rxs->r_flags & IEEE80211_R_BAND) == 0)
1858 return (NULL);
1859
1860 /*
1861 * If the rx status contains a valid ieee/freq, then
1862 * ensure we populate the correct channel information
1863 * in rxchan before passing it up to the scan infrastructure.
1864 * Offload NICs will pass up beacons from all channels
1865 * during background scans.
1866 */
1867
1868 /* Determine a band */
1869 switch (rxs->c_band) {
1870 case IEEE80211_CHAN_2GHZ:
1871 flags = IEEE80211_CHAN_G;
1872 break;
1873 case IEEE80211_CHAN_5GHZ:
1874 flags = IEEE80211_CHAN_A;
1875 break;
1876 default:
1877 if (rxs->c_freq < 3000) {
1878 flags = IEEE80211_CHAN_G;
1879 } else {
1880 flags = IEEE80211_CHAN_A;
1881 }
1882 break;
1883 }
1884
1885 /* Channel lookup */
1886 c = ieee80211_find_channel(ic, rxs->c_freq, flags);
1887
1888 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INPUT,
1889 "%s: freq=%d, ieee=%d, flags=0x%08x; c=%p\n",
1890 __func__, (int) rxs->c_freq, (int) rxs->c_ieee, flags, c);
1891
1892 return (c);
1893 }
1894
1895 static void
addmedia(struct ifmedia * media,int caps,int addsta,int mode,int mword)1896 addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword)
1897 {
1898 #define ADD(_ic, _s, _o) \
1899 ifmedia_add(media, \
1900 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL)
1901 static const u_int mopts[IEEE80211_MODE_MAX] = {
1902 [IEEE80211_MODE_AUTO] = IFM_AUTO,
1903 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A,
1904 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B,
1905 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G,
1906 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH,
1907 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
1908 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO,
1909 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
1910 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */
1911 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */
1912 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA,
1913 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG,
1914 [IEEE80211_MODE_VHT_2GHZ] = IFM_IEEE80211_VHT2G,
1915 [IEEE80211_MODE_VHT_5GHZ] = IFM_IEEE80211_VHT5G,
1916 };
1917 u_int mopt;
1918
1919 mopt = mopts[mode];
1920 if (addsta)
1921 ADD(ic, mword, mopt); /* STA mode has no cap */
1922 if (caps & IEEE80211_C_IBSS)
1923 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC);
1924 if (caps & IEEE80211_C_HOSTAP)
1925 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP);
1926 if (caps & IEEE80211_C_AHDEMO)
1927 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0);
1928 if (caps & IEEE80211_C_MONITOR)
1929 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR);
1930 if (caps & IEEE80211_C_WDS)
1931 ADD(media, mword, mopt | IFM_IEEE80211_WDS);
1932 if (caps & IEEE80211_C_MBSS)
1933 ADD(media, mword, mopt | IFM_IEEE80211_MBSS);
1934 #undef ADD
1935 }
1936
1937 /*
1938 * Setup the media data structures according to the channel and
1939 * rate tables.
1940 */
1941 static int
ieee80211_media_setup(struct ieee80211com * ic,struct ifmedia * media,int caps,int addsta,ifm_change_cb_t media_change,ifm_stat_cb_t media_stat)1942 ieee80211_media_setup(struct ieee80211com *ic,
1943 struct ifmedia *media, int caps, int addsta,
1944 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
1945 {
1946 int i, j, rate, maxrate, mword, r;
1947 enum ieee80211_phymode mode;
1948 const struct ieee80211_rateset *rs;
1949 struct ieee80211_rateset allrates;
1950
1951 /*
1952 * Fill in media characteristics.
1953 */
1954 ifmedia_init(media, 0, media_change, media_stat);
1955 maxrate = 0;
1956 /*
1957 * Add media for legacy operating modes.
1958 */
1959 memset(&allrates, 0, sizeof(allrates));
1960 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) {
1961 if (isclr(ic->ic_modecaps, mode))
1962 continue;
1963 addmedia(media, caps, addsta, mode, IFM_AUTO);
1964 if (mode == IEEE80211_MODE_AUTO)
1965 continue;
1966 rs = &ic->ic_sup_rates[mode];
1967 for (i = 0; i < rs->rs_nrates; i++) {
1968 rate = rs->rs_rates[i];
1969 mword = ieee80211_rate2media(ic, rate, mode);
1970 if (mword == 0)
1971 continue;
1972 addmedia(media, caps, addsta, mode, mword);
1973 /*
1974 * Add legacy rate to the collection of all rates.
1975 */
1976 r = rate & IEEE80211_RATE_VAL;
1977 for (j = 0; j < allrates.rs_nrates; j++)
1978 if (allrates.rs_rates[j] == r)
1979 break;
1980 if (j == allrates.rs_nrates) {
1981 /* unique, add to the set */
1982 allrates.rs_rates[j] = r;
1983 allrates.rs_nrates++;
1984 }
1985 rate = (rate & IEEE80211_RATE_VAL) / 2;
1986 if (rate > maxrate)
1987 maxrate = rate;
1988 }
1989 }
1990 for (i = 0; i < allrates.rs_nrates; i++) {
1991 mword = ieee80211_rate2media(ic, allrates.rs_rates[i],
1992 IEEE80211_MODE_AUTO);
1993 if (mword == 0)
1994 continue;
1995 /* NB: remove media options from mword */
1996 addmedia(media, caps, addsta,
1997 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword));
1998 }
1999 /*
2000 * Add HT/11n media. Note that we do not have enough
2001 * bits in the media subtype to express the MCS so we
2002 * use a "placeholder" media subtype and any fixed MCS
2003 * must be specified with a different mechanism.
2004 */
2005 for (; mode <= IEEE80211_MODE_11NG; mode++) {
2006 if (isclr(ic->ic_modecaps, mode))
2007 continue;
2008 addmedia(media, caps, addsta, mode, IFM_AUTO);
2009 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS);
2010 }
2011 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) ||
2012 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) {
2013 addmedia(media, caps, addsta,
2014 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS);
2015 i = ic->ic_txstream * 8 - 1;
2016 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) &&
2017 (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40))
2018 rate = ieee80211_htrates[i].ht40_rate_400ns;
2019 else if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40))
2020 rate = ieee80211_htrates[i].ht40_rate_800ns;
2021 else if ((ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20))
2022 rate = ieee80211_htrates[i].ht20_rate_400ns;
2023 else
2024 rate = ieee80211_htrates[i].ht20_rate_800ns;
2025 if (rate > maxrate)
2026 maxrate = rate;
2027 }
2028
2029 /*
2030 * Add VHT media.
2031 * XXX-BZ skip "VHT_2GHZ" for now.
2032 */
2033 for (mode = IEEE80211_MODE_VHT_5GHZ; mode <= IEEE80211_MODE_VHT_5GHZ;
2034 mode++) {
2035 if (isclr(ic->ic_modecaps, mode))
2036 continue;
2037 addmedia(media, caps, addsta, mode, IFM_AUTO);
2038 addmedia(media, caps, addsta, mode, IFM_IEEE80211_VHT);
2039 }
2040 if (isset(ic->ic_modecaps, IEEE80211_MODE_VHT_5GHZ)) {
2041 addmedia(media, caps, addsta,
2042 IEEE80211_MODE_AUTO, IFM_IEEE80211_VHT);
2043
2044 /* XXX TODO: VHT maxrate */
2045 }
2046
2047 return maxrate;
2048 }
2049
2050 /* XXX inline or eliminate? */
2051 const struct ieee80211_rateset *
ieee80211_get_suprates(struct ieee80211com * ic,const struct ieee80211_channel * c)2052 ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c)
2053 {
2054 /* XXX does this work for 11ng basic rates? */
2055 return &ic->ic_sup_rates[ieee80211_chan2mode(c)];
2056 }
2057
2058 /* XXX inline or eliminate? */
2059 const struct ieee80211_htrateset *
ieee80211_get_suphtrates(struct ieee80211com * ic,const struct ieee80211_channel * c)2060 ieee80211_get_suphtrates(struct ieee80211com *ic,
2061 const struct ieee80211_channel *c)
2062 {
2063 return &ic->ic_sup_htrates;
2064 }
2065
2066 void
ieee80211_announce(struct ieee80211com * ic)2067 ieee80211_announce(struct ieee80211com *ic)
2068 {
2069 int i, rate, mword;
2070 enum ieee80211_phymode mode;
2071 const struct ieee80211_rateset *rs;
2072
2073 /* NB: skip AUTO since it has no rates */
2074 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) {
2075 if (isclr(ic->ic_modecaps, mode))
2076 continue;
2077 ic_printf(ic, "%s rates: ", ieee80211_phymode_name[mode]);
2078 rs = &ic->ic_sup_rates[mode];
2079 for (i = 0; i < rs->rs_nrates; i++) {
2080 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode);
2081 if (mword == 0)
2082 continue;
2083 rate = ieee80211_media2rate(mword);
2084 printf("%s%d%sMbps", (i != 0 ? " " : ""),
2085 rate / 2, ((rate & 0x1) != 0 ? ".5" : ""));
2086 }
2087 printf("\n");
2088 }
2089 ieee80211_ht_announce(ic);
2090 ieee80211_vht_announce(ic);
2091 }
2092
2093 void
ieee80211_announce_channels(struct ieee80211com * ic)2094 ieee80211_announce_channels(struct ieee80211com *ic)
2095 {
2096 const struct ieee80211_channel *c;
2097 char type;
2098 int i, cw;
2099
2100 printf("Chan Freq CW RegPwr MinPwr MaxPwr\n");
2101 for (i = 0; i < ic->ic_nchans; i++) {
2102 c = &ic->ic_channels[i];
2103 if (IEEE80211_IS_CHAN_ST(c))
2104 type = 'S';
2105 else if (IEEE80211_IS_CHAN_108A(c))
2106 type = 'T';
2107 else if (IEEE80211_IS_CHAN_108G(c))
2108 type = 'G';
2109 else if (IEEE80211_IS_CHAN_HT(c))
2110 type = 'n';
2111 else if (IEEE80211_IS_CHAN_A(c))
2112 type = 'a';
2113 else if (IEEE80211_IS_CHAN_ANYG(c))
2114 type = 'g';
2115 else if (IEEE80211_IS_CHAN_B(c))
2116 type = 'b';
2117 else
2118 type = 'f';
2119 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c))
2120 cw = 40;
2121 else if (IEEE80211_IS_CHAN_HALF(c))
2122 cw = 10;
2123 else if (IEEE80211_IS_CHAN_QUARTER(c))
2124 cw = 5;
2125 else
2126 cw = 20;
2127 printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n"
2128 , c->ic_ieee, c->ic_freq, type
2129 , cw
2130 , IEEE80211_IS_CHAN_HT40U(c) ? '+' :
2131 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' '
2132 , c->ic_maxregpower
2133 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0
2134 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0
2135 );
2136 }
2137 }
2138
2139 static int
media2mode(const struct ifmedia_entry * ime,uint32_t flags,uint16_t * mode)2140 media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode)
2141 {
2142 switch (IFM_MODE(ime->ifm_media)) {
2143 case IFM_IEEE80211_11A:
2144 *mode = IEEE80211_MODE_11A;
2145 break;
2146 case IFM_IEEE80211_11B:
2147 *mode = IEEE80211_MODE_11B;
2148 break;
2149 case IFM_IEEE80211_11G:
2150 *mode = IEEE80211_MODE_11G;
2151 break;
2152 case IFM_IEEE80211_FH:
2153 *mode = IEEE80211_MODE_FH;
2154 break;
2155 case IFM_IEEE80211_11NA:
2156 *mode = IEEE80211_MODE_11NA;
2157 break;
2158 case IFM_IEEE80211_11NG:
2159 *mode = IEEE80211_MODE_11NG;
2160 break;
2161 case IFM_IEEE80211_VHT2G:
2162 *mode = IEEE80211_MODE_VHT_2GHZ;
2163 break;
2164 case IFM_IEEE80211_VHT5G:
2165 *mode = IEEE80211_MODE_VHT_5GHZ;
2166 break;
2167 case IFM_AUTO:
2168 *mode = IEEE80211_MODE_AUTO;
2169 break;
2170 default:
2171 return 0;
2172 }
2173 /*
2174 * Turbo mode is an ``option''.
2175 * XXX does not apply to AUTO
2176 */
2177 if (ime->ifm_media & IFM_IEEE80211_TURBO) {
2178 if (*mode == IEEE80211_MODE_11A) {
2179 if (flags & IEEE80211_F_TURBOP)
2180 *mode = IEEE80211_MODE_TURBO_A;
2181 else
2182 *mode = IEEE80211_MODE_STURBO_A;
2183 } else if (*mode == IEEE80211_MODE_11G)
2184 *mode = IEEE80211_MODE_TURBO_G;
2185 else
2186 return 0;
2187 }
2188 /* XXX HT40 +/- */
2189 return 1;
2190 }
2191
2192 /*
2193 * Handle a media change request on the vap interface.
2194 */
2195 int
ieee80211_media_change(struct ifnet * ifp)2196 ieee80211_media_change(struct ifnet *ifp)
2197 {
2198 struct ieee80211vap *vap = ifp->if_softc;
2199 struct ifmedia_entry *ime = vap->iv_media.ifm_cur;
2200 uint16_t newmode;
2201
2202 if (!media2mode(ime, vap->iv_flags, &newmode))
2203 return EINVAL;
2204 if (vap->iv_des_mode != newmode) {
2205 vap->iv_des_mode = newmode;
2206 /* XXX kick state machine if up+running */
2207 }
2208 return 0;
2209 }
2210
2211 /*
2212 * Common code to calculate the media status word
2213 * from the operating mode and channel state.
2214 */
2215 static int
media_status(enum ieee80211_opmode opmode,const struct ieee80211_channel * chan)2216 media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan)
2217 {
2218 int status;
2219
2220 status = IFM_IEEE80211;
2221 switch (opmode) {
2222 case IEEE80211_M_STA:
2223 break;
2224 case IEEE80211_M_IBSS:
2225 status |= IFM_IEEE80211_ADHOC;
2226 break;
2227 case IEEE80211_M_HOSTAP:
2228 status |= IFM_IEEE80211_HOSTAP;
2229 break;
2230 case IEEE80211_M_MONITOR:
2231 status |= IFM_IEEE80211_MONITOR;
2232 break;
2233 case IEEE80211_M_AHDEMO:
2234 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0;
2235 break;
2236 case IEEE80211_M_WDS:
2237 status |= IFM_IEEE80211_WDS;
2238 break;
2239 case IEEE80211_M_MBSS:
2240 status |= IFM_IEEE80211_MBSS;
2241 break;
2242 }
2243 if (IEEE80211_IS_CHAN_VHT_5GHZ(chan)) {
2244 status |= IFM_IEEE80211_VHT5G;
2245 } else if (IEEE80211_IS_CHAN_VHT_2GHZ(chan)) {
2246 status |= IFM_IEEE80211_VHT2G;
2247 } else if (IEEE80211_IS_CHAN_HTA(chan)) {
2248 status |= IFM_IEEE80211_11NA;
2249 } else if (IEEE80211_IS_CHAN_HTG(chan)) {
2250 status |= IFM_IEEE80211_11NG;
2251 } else if (IEEE80211_IS_CHAN_A(chan)) {
2252 status |= IFM_IEEE80211_11A;
2253 } else if (IEEE80211_IS_CHAN_B(chan)) {
2254 status |= IFM_IEEE80211_11B;
2255 } else if (IEEE80211_IS_CHAN_ANYG(chan)) {
2256 status |= IFM_IEEE80211_11G;
2257 } else if (IEEE80211_IS_CHAN_FHSS(chan)) {
2258 status |= IFM_IEEE80211_FH;
2259 }
2260 /* XXX else complain? */
2261
2262 if (IEEE80211_IS_CHAN_TURBO(chan))
2263 status |= IFM_IEEE80211_TURBO;
2264 #if 0
2265 if (IEEE80211_IS_CHAN_HT20(chan))
2266 status |= IFM_IEEE80211_HT20;
2267 if (IEEE80211_IS_CHAN_HT40(chan))
2268 status |= IFM_IEEE80211_HT40;
2269 #endif
2270 return status;
2271 }
2272
2273 void
ieee80211_media_status(struct ifnet * ifp,struct ifmediareq * imr)2274 ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr)
2275 {
2276 struct ieee80211vap *vap = ifp->if_softc;
2277 struct ieee80211com *ic = vap->iv_ic;
2278 enum ieee80211_phymode mode;
2279
2280 imr->ifm_status = IFM_AVALID;
2281 /*
2282 * NB: use the current channel's mode to lock down a xmit
2283 * rate only when running; otherwise we may have a mismatch
2284 * in which case the rate will not be convertible.
2285 */
2286 if (vap->iv_state == IEEE80211_S_RUN ||
2287 vap->iv_state == IEEE80211_S_SLEEP) {
2288 imr->ifm_status |= IFM_ACTIVE;
2289 mode = ieee80211_chan2mode(ic->ic_curchan);
2290 } else
2291 mode = IEEE80211_MODE_AUTO;
2292 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan);
2293 /*
2294 * Calculate a current rate if possible.
2295 */
2296 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) {
2297 /*
2298 * A fixed rate is set, report that.
2299 */
2300 imr->ifm_active |= ieee80211_rate2media(ic,
2301 vap->iv_txparms[mode].ucastrate, mode);
2302 } else if (vap->iv_opmode == IEEE80211_M_STA) {
2303 /*
2304 * In station mode report the current transmit rate.
2305 */
2306 imr->ifm_active |= ieee80211_rate2media(ic,
2307 vap->iv_bss->ni_txrate, mode);
2308 } else
2309 imr->ifm_active |= IFM_AUTO;
2310 if (imr->ifm_status & IFM_ACTIVE)
2311 imr->ifm_current = imr->ifm_active;
2312 }
2313
2314 /*
2315 * Set the current phy mode and recalculate the active channel
2316 * set based on the available channels for this mode. Also
2317 * select a new default/current channel if the current one is
2318 * inappropriate for this mode.
2319 */
2320 int
ieee80211_setmode(struct ieee80211com * ic,enum ieee80211_phymode mode)2321 ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode)
2322 {
2323 /*
2324 * Adjust basic rates in 11b/11g supported rate set.
2325 * Note that if operating on a hal/quarter rate channel
2326 * this is a noop as those rates sets are different
2327 * and used instead.
2328 */
2329 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B)
2330 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode);
2331
2332 ic->ic_curmode = mode;
2333 ieee80211_reset_erp(ic); /* reset global ERP state */
2334
2335 return 0;
2336 }
2337
2338 /*
2339 * Return the phy mode for with the specified channel.
2340 */
2341 enum ieee80211_phymode
ieee80211_chan2mode(const struct ieee80211_channel * chan)2342 ieee80211_chan2mode(const struct ieee80211_channel *chan)
2343 {
2344
2345 if (IEEE80211_IS_CHAN_VHT_2GHZ(chan))
2346 return IEEE80211_MODE_VHT_2GHZ;
2347 else if (IEEE80211_IS_CHAN_VHT_5GHZ(chan))
2348 return IEEE80211_MODE_VHT_5GHZ;
2349 else if (IEEE80211_IS_CHAN_HTA(chan))
2350 return IEEE80211_MODE_11NA;
2351 else if (IEEE80211_IS_CHAN_HTG(chan))
2352 return IEEE80211_MODE_11NG;
2353 else if (IEEE80211_IS_CHAN_108G(chan))
2354 return IEEE80211_MODE_TURBO_G;
2355 else if (IEEE80211_IS_CHAN_ST(chan))
2356 return IEEE80211_MODE_STURBO_A;
2357 else if (IEEE80211_IS_CHAN_TURBO(chan))
2358 return IEEE80211_MODE_TURBO_A;
2359 else if (IEEE80211_IS_CHAN_HALF(chan))
2360 return IEEE80211_MODE_HALF;
2361 else if (IEEE80211_IS_CHAN_QUARTER(chan))
2362 return IEEE80211_MODE_QUARTER;
2363 else if (IEEE80211_IS_CHAN_A(chan))
2364 return IEEE80211_MODE_11A;
2365 else if (IEEE80211_IS_CHAN_ANYG(chan))
2366 return IEEE80211_MODE_11G;
2367 else if (IEEE80211_IS_CHAN_B(chan))
2368 return IEEE80211_MODE_11B;
2369 else if (IEEE80211_IS_CHAN_FHSS(chan))
2370 return IEEE80211_MODE_FH;
2371
2372 /* NB: should not get here */
2373 printf("%s: cannot map channel to mode; freq %u flags 0x%x\n",
2374 __func__, chan->ic_freq, chan->ic_flags);
2375 return IEEE80211_MODE_11B;
2376 }
2377
2378 struct ratemedia {
2379 u_int match; /* rate + mode */
2380 u_int media; /* if_media rate */
2381 };
2382
2383 static int
findmedia(const struct ratemedia rates[],int n,u_int match)2384 findmedia(const struct ratemedia rates[], int n, u_int match)
2385 {
2386 int i;
2387
2388 for (i = 0; i < n; i++)
2389 if (rates[i].match == match)
2390 return rates[i].media;
2391 return IFM_AUTO;
2392 }
2393
2394 /*
2395 * Convert IEEE80211 rate value to ifmedia subtype.
2396 * Rate is either a legacy rate in units of 0.5Mbps
2397 * or an MCS index.
2398 */
2399 int
ieee80211_rate2media(struct ieee80211com * ic,int rate,enum ieee80211_phymode mode)2400 ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode)
2401 {
2402 static const struct ratemedia rates[] = {
2403 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 },
2404 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 },
2405 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 },
2406 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 },
2407 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 },
2408 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 },
2409 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 },
2410 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 },
2411 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 },
2412 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 },
2413 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 },
2414 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 },
2415 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 },
2416 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 },
2417 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 },
2418 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 },
2419 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 },
2420 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 },
2421 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 },
2422 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 },
2423 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 },
2424 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 },
2425 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 },
2426 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 },
2427 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 },
2428 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 },
2429 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 },
2430 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 },
2431 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 },
2432 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 },
2433 /* NB: OFDM72 doesn't really exist so we don't handle it */
2434 };
2435 static const struct ratemedia htrates[] = {
2436 { 0, IFM_IEEE80211_MCS },
2437 { 1, IFM_IEEE80211_MCS },
2438 { 2, IFM_IEEE80211_MCS },
2439 { 3, IFM_IEEE80211_MCS },
2440 { 4, IFM_IEEE80211_MCS },
2441 { 5, IFM_IEEE80211_MCS },
2442 { 6, IFM_IEEE80211_MCS },
2443 { 7, IFM_IEEE80211_MCS },
2444 { 8, IFM_IEEE80211_MCS },
2445 { 9, IFM_IEEE80211_MCS },
2446 { 10, IFM_IEEE80211_MCS },
2447 { 11, IFM_IEEE80211_MCS },
2448 { 12, IFM_IEEE80211_MCS },
2449 { 13, IFM_IEEE80211_MCS },
2450 { 14, IFM_IEEE80211_MCS },
2451 { 15, IFM_IEEE80211_MCS },
2452 { 16, IFM_IEEE80211_MCS },
2453 { 17, IFM_IEEE80211_MCS },
2454 { 18, IFM_IEEE80211_MCS },
2455 { 19, IFM_IEEE80211_MCS },
2456 { 20, IFM_IEEE80211_MCS },
2457 { 21, IFM_IEEE80211_MCS },
2458 { 22, IFM_IEEE80211_MCS },
2459 { 23, IFM_IEEE80211_MCS },
2460 { 24, IFM_IEEE80211_MCS },
2461 { 25, IFM_IEEE80211_MCS },
2462 { 26, IFM_IEEE80211_MCS },
2463 { 27, IFM_IEEE80211_MCS },
2464 { 28, IFM_IEEE80211_MCS },
2465 { 29, IFM_IEEE80211_MCS },
2466 { 30, IFM_IEEE80211_MCS },
2467 { 31, IFM_IEEE80211_MCS },
2468 { 32, IFM_IEEE80211_MCS },
2469 { 33, IFM_IEEE80211_MCS },
2470 { 34, IFM_IEEE80211_MCS },
2471 { 35, IFM_IEEE80211_MCS },
2472 { 36, IFM_IEEE80211_MCS },
2473 { 37, IFM_IEEE80211_MCS },
2474 { 38, IFM_IEEE80211_MCS },
2475 { 39, IFM_IEEE80211_MCS },
2476 { 40, IFM_IEEE80211_MCS },
2477 { 41, IFM_IEEE80211_MCS },
2478 { 42, IFM_IEEE80211_MCS },
2479 { 43, IFM_IEEE80211_MCS },
2480 { 44, IFM_IEEE80211_MCS },
2481 { 45, IFM_IEEE80211_MCS },
2482 { 46, IFM_IEEE80211_MCS },
2483 { 47, IFM_IEEE80211_MCS },
2484 { 48, IFM_IEEE80211_MCS },
2485 { 49, IFM_IEEE80211_MCS },
2486 { 50, IFM_IEEE80211_MCS },
2487 { 51, IFM_IEEE80211_MCS },
2488 { 52, IFM_IEEE80211_MCS },
2489 { 53, IFM_IEEE80211_MCS },
2490 { 54, IFM_IEEE80211_MCS },
2491 { 55, IFM_IEEE80211_MCS },
2492 { 56, IFM_IEEE80211_MCS },
2493 { 57, IFM_IEEE80211_MCS },
2494 { 58, IFM_IEEE80211_MCS },
2495 { 59, IFM_IEEE80211_MCS },
2496 { 60, IFM_IEEE80211_MCS },
2497 { 61, IFM_IEEE80211_MCS },
2498 { 62, IFM_IEEE80211_MCS },
2499 { 63, IFM_IEEE80211_MCS },
2500 { 64, IFM_IEEE80211_MCS },
2501 { 65, IFM_IEEE80211_MCS },
2502 { 66, IFM_IEEE80211_MCS },
2503 { 67, IFM_IEEE80211_MCS },
2504 { 68, IFM_IEEE80211_MCS },
2505 { 69, IFM_IEEE80211_MCS },
2506 { 70, IFM_IEEE80211_MCS },
2507 { 71, IFM_IEEE80211_MCS },
2508 { 72, IFM_IEEE80211_MCS },
2509 { 73, IFM_IEEE80211_MCS },
2510 { 74, IFM_IEEE80211_MCS },
2511 { 75, IFM_IEEE80211_MCS },
2512 { 76, IFM_IEEE80211_MCS },
2513 };
2514 static const struct ratemedia vhtrates[] = {
2515 { 0, IFM_IEEE80211_VHT },
2516 { 1, IFM_IEEE80211_VHT },
2517 { 2, IFM_IEEE80211_VHT },
2518 { 3, IFM_IEEE80211_VHT },
2519 { 4, IFM_IEEE80211_VHT },
2520 { 5, IFM_IEEE80211_VHT },
2521 { 6, IFM_IEEE80211_VHT },
2522 { 7, IFM_IEEE80211_VHT },
2523 { 8, IFM_IEEE80211_VHT }, /* Optional. */
2524 { 9, IFM_IEEE80211_VHT }, /* Optional. */
2525 #if 0
2526 /* Some QCA and BRCM seem to support this; offspec. */
2527 { 10, IFM_IEEE80211_VHT },
2528 { 11, IFM_IEEE80211_VHT },
2529 #endif
2530 };
2531 int m;
2532
2533 /*
2534 * Check 11ac/11n rates first for match as an MCS.
2535 */
2536 if (mode == IEEE80211_MODE_VHT_5GHZ) {
2537 if (rate & IFM_IEEE80211_VHT) {
2538 rate &= ~IFM_IEEE80211_VHT;
2539 m = findmedia(vhtrates, nitems(vhtrates), rate);
2540 if (m != IFM_AUTO)
2541 return (m | IFM_IEEE80211_VHT);
2542 }
2543 } else if (mode == IEEE80211_MODE_11NA) {
2544 if (rate & IEEE80211_RATE_MCS) {
2545 rate &= ~IEEE80211_RATE_MCS;
2546 m = findmedia(htrates, nitems(htrates), rate);
2547 if (m != IFM_AUTO)
2548 return m | IFM_IEEE80211_11NA;
2549 }
2550 } else if (mode == IEEE80211_MODE_11NG) {
2551 /* NB: 12 is ambiguous, it will be treated as an MCS */
2552 if (rate & IEEE80211_RATE_MCS) {
2553 rate &= ~IEEE80211_RATE_MCS;
2554 m = findmedia(htrates, nitems(htrates), rate);
2555 if (m != IFM_AUTO)
2556 return m | IFM_IEEE80211_11NG;
2557 }
2558 }
2559 rate &= IEEE80211_RATE_VAL;
2560 switch (mode) {
2561 case IEEE80211_MODE_11A:
2562 case IEEE80211_MODE_HALF: /* XXX good 'nuf */
2563 case IEEE80211_MODE_QUARTER:
2564 case IEEE80211_MODE_11NA:
2565 case IEEE80211_MODE_TURBO_A:
2566 case IEEE80211_MODE_STURBO_A:
2567 return findmedia(rates, nitems(rates),
2568 rate | IFM_IEEE80211_11A);
2569 case IEEE80211_MODE_11B:
2570 return findmedia(rates, nitems(rates),
2571 rate | IFM_IEEE80211_11B);
2572 case IEEE80211_MODE_FH:
2573 return findmedia(rates, nitems(rates),
2574 rate | IFM_IEEE80211_FH);
2575 case IEEE80211_MODE_AUTO:
2576 /* NB: ic may be NULL for some drivers */
2577 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH)
2578 return findmedia(rates, nitems(rates),
2579 rate | IFM_IEEE80211_FH);
2580 /* NB: hack, 11g matches both 11b+11a rates */
2581 /* fall thru... */
2582 case IEEE80211_MODE_11G:
2583 case IEEE80211_MODE_11NG:
2584 case IEEE80211_MODE_TURBO_G:
2585 return findmedia(rates, nitems(rates), rate | IFM_IEEE80211_11G);
2586 case IEEE80211_MODE_VHT_2GHZ:
2587 case IEEE80211_MODE_VHT_5GHZ:
2588 /* XXX TODO: need to figure out mapping for VHT rates */
2589 return IFM_AUTO;
2590 }
2591 return IFM_AUTO;
2592 }
2593
2594 int
ieee80211_media2rate(int mword)2595 ieee80211_media2rate(int mword)
2596 {
2597 static const int ieeerates[] = {
2598 -1, /* IFM_AUTO */
2599 0, /* IFM_MANUAL */
2600 0, /* IFM_NONE */
2601 2, /* IFM_IEEE80211_FH1 */
2602 4, /* IFM_IEEE80211_FH2 */
2603 2, /* IFM_IEEE80211_DS1 */
2604 4, /* IFM_IEEE80211_DS2 */
2605 11, /* IFM_IEEE80211_DS5 */
2606 22, /* IFM_IEEE80211_DS11 */
2607 44, /* IFM_IEEE80211_DS22 */
2608 12, /* IFM_IEEE80211_OFDM6 */
2609 18, /* IFM_IEEE80211_OFDM9 */
2610 24, /* IFM_IEEE80211_OFDM12 */
2611 36, /* IFM_IEEE80211_OFDM18 */
2612 48, /* IFM_IEEE80211_OFDM24 */
2613 72, /* IFM_IEEE80211_OFDM36 */
2614 96, /* IFM_IEEE80211_OFDM48 */
2615 108, /* IFM_IEEE80211_OFDM54 */
2616 144, /* IFM_IEEE80211_OFDM72 */
2617 0, /* IFM_IEEE80211_DS354k */
2618 0, /* IFM_IEEE80211_DS512k */
2619 6, /* IFM_IEEE80211_OFDM3 */
2620 9, /* IFM_IEEE80211_OFDM4 */
2621 54, /* IFM_IEEE80211_OFDM27 */
2622 -1, /* IFM_IEEE80211_MCS */
2623 -1, /* IFM_IEEE80211_VHT */
2624 };
2625 return IFM_SUBTYPE(mword) < nitems(ieeerates) ?
2626 ieeerates[IFM_SUBTYPE(mword)] : 0;
2627 }
2628
2629 /*
2630 * The following hash function is adapted from "Hash Functions" by Bob Jenkins
2631 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997).
2632 */
2633 #define mix(a, b, c) \
2634 do { \
2635 a -= b; a -= c; a ^= (c >> 13); \
2636 b -= c; b -= a; b ^= (a << 8); \
2637 c -= a; c -= b; c ^= (b >> 13); \
2638 a -= b; a -= c; a ^= (c >> 12); \
2639 b -= c; b -= a; b ^= (a << 16); \
2640 c -= a; c -= b; c ^= (b >> 5); \
2641 a -= b; a -= c; a ^= (c >> 3); \
2642 b -= c; b -= a; b ^= (a << 10); \
2643 c -= a; c -= b; c ^= (b >> 15); \
2644 } while (/*CONSTCOND*/0)
2645
2646 uint32_t
ieee80211_mac_hash(const struct ieee80211com * ic,const uint8_t addr[IEEE80211_ADDR_LEN])2647 ieee80211_mac_hash(const struct ieee80211com *ic,
2648 const uint8_t addr[IEEE80211_ADDR_LEN])
2649 {
2650 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key;
2651
2652 b += addr[5] << 8;
2653 b += addr[4];
2654 a += addr[3] << 24;
2655 a += addr[2] << 16;
2656 a += addr[1] << 8;
2657 a += addr[0];
2658
2659 mix(a, b, c);
2660
2661 return c;
2662 }
2663 #undef mix
2664
2665 char
ieee80211_channel_type_char(const struct ieee80211_channel * c)2666 ieee80211_channel_type_char(const struct ieee80211_channel *c)
2667 {
2668 if (IEEE80211_IS_CHAN_ST(c))
2669 return 'S';
2670 if (IEEE80211_IS_CHAN_108A(c))
2671 return 'T';
2672 if (IEEE80211_IS_CHAN_108G(c))
2673 return 'G';
2674 if (IEEE80211_IS_CHAN_VHT(c))
2675 return 'v';
2676 if (IEEE80211_IS_CHAN_HT(c))
2677 return 'n';
2678 if (IEEE80211_IS_CHAN_A(c))
2679 return 'a';
2680 if (IEEE80211_IS_CHAN_ANYG(c))
2681 return 'g';
2682 if (IEEE80211_IS_CHAN_B(c))
2683 return 'b';
2684 return 'f';
2685 }
2686