1/*-
2 * Copyright (c) 2001 Atsushi Onoe
3 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: head/sys/net80211/ieee80211.c 286410 2015-08-07 11:43:14Z glebius $");
29
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/socket.h>
39#include <sys/sbuf.h>
40
41#include <machine/stdarg.h>
42
43#include <net/if.h>
44#include <net/if_var.h>
45#include <net/if_dl.h>
46#include <net/if_media.h>
47#include <net/if_types.h>
48#include <net/ethernet.h>
49
50#include <net80211/ieee80211_var.h>
51#include <net80211/ieee80211_regdomain.h>
52#ifdef IEEE80211_SUPPORT_SUPERG
53#include <net80211/ieee80211_superg.h>
54#endif
55#include <net80211/ieee80211_ratectl.h>
56
57#include <net/bpf.h>
58
59const char *ieee80211_phymode_name[IEEE80211_MODE_MAX] = {
60 [IEEE80211_MODE_AUTO] = "auto",
61 [IEEE80211_MODE_11A] = "11a",
62 [IEEE80211_MODE_11B] = "11b",
63 [IEEE80211_MODE_11G] = "11g",
64 [IEEE80211_MODE_FH] = "FH",
65 [IEEE80211_MODE_TURBO_A] = "turboA",
66 [IEEE80211_MODE_TURBO_G] = "turboG",
67 [IEEE80211_MODE_STURBO_A] = "sturboA",
68 [IEEE80211_MODE_HALF] = "half",
69 [IEEE80211_MODE_QUARTER] = "quarter",
70 [IEEE80211_MODE_11NA] = "11na",
71 [IEEE80211_MODE_11NG] = "11ng",
72};
73/* map ieee80211_opmode to the corresponding capability bit */
74const int ieee80211_opcap[IEEE80211_OPMODE_MAX] = {
75 [IEEE80211_M_IBSS] = IEEE80211_C_IBSS,
76 [IEEE80211_M_WDS] = IEEE80211_C_WDS,
77 [IEEE80211_M_STA] = IEEE80211_C_STA,
78 [IEEE80211_M_AHDEMO] = IEEE80211_C_AHDEMO,
79 [IEEE80211_M_HOSTAP] = IEEE80211_C_HOSTAP,
80 [IEEE80211_M_MONITOR] = IEEE80211_C_MONITOR,
81#ifdef IEEE80211_SUPPORT_MESH
82 [IEEE80211_M_MBSS] = IEEE80211_C_MBSS,
83#endif
84};
85
86const uint8_t ieee80211broadcastaddr[IEEE80211_ADDR_LEN] =
87 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
88
89static void ieee80211_syncflag_locked(struct ieee80211com *ic, int flag);
90static void ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag);
91static void ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag);
92static int ieee80211_media_setup(struct ieee80211com *ic,
93 struct ifmedia *media, int caps, int addsta,
94 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat);
95static int media_status(enum ieee80211_opmode,
96 const struct ieee80211_channel *);
97static uint64_t ieee80211_get_counter(struct ifnet *, ift_counter);
98
99MALLOC_DEFINE(M_80211_VAP, "80211vap", "802.11 vap state");
100
101/*
102 * Default supported rates for 802.11 operation (in IEEE .5Mb units).
103 */
104#define B(r) ((r) | IEEE80211_RATE_BASIC)
105static const struct ieee80211_rateset ieee80211_rateset_11a =
106 { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } };
107static const struct ieee80211_rateset ieee80211_rateset_half =
108 { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } };
109static const struct ieee80211_rateset ieee80211_rateset_quarter =
110 { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } };
111static const struct ieee80211_rateset ieee80211_rateset_11b =
112 { 4, { B(2), B(4), B(11), B(22) } };
113/* NB: OFDM rates are handled specially based on mode */
114static const struct ieee80211_rateset ieee80211_rateset_11g =
115 { 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } };
116#undef B
117
118/*
119 * Fill in 802.11 available channel set, mark
120 * all available channels as active, and pick
121 * a default channel if not already specified.
122 */
123void
124ieee80211_chan_init(struct ieee80211com *ic)
125{
126#define DEFAULTRATES(m, def) do { \
127 if (ic->ic_sup_rates[m].rs_nrates == 0) \
128 ic->ic_sup_rates[m] = def; \
129} while (0)
130 struct ieee80211_channel *c;
131 int i;
132
133 KASSERT(0 < ic->ic_nchans && ic->ic_nchans <= IEEE80211_CHAN_MAX,
134 ("invalid number of channels specified: %u", ic->ic_nchans));
135 memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail));
136 memset(ic->ic_modecaps, 0, sizeof(ic->ic_modecaps));
137 setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO);
138 for (i = 0; i < ic->ic_nchans; i++) {
139 c = &ic->ic_channels[i];
140 KASSERT(c->ic_flags != 0, ("channel with no flags"));
141 /*
142 * Help drivers that work only with frequencies by filling
143 * in IEEE channel #'s if not already calculated. Note this
144 * mimics similar work done in ieee80211_setregdomain when
145 * changing regulatory state.
146 */
147 if (c->ic_ieee == 0)
148 c->ic_ieee = ieee80211_mhz2ieee(c->ic_freq,c->ic_flags);
149 if (IEEE80211_IS_CHAN_HT40(c) && c->ic_extieee == 0)
150 c->ic_extieee = ieee80211_mhz2ieee(c->ic_freq +
151 (IEEE80211_IS_CHAN_HT40U(c) ? 20 : -20),
152 c->ic_flags);
153 /* default max tx power to max regulatory */
154 if (c->ic_maxpower == 0)
155 c->ic_maxpower = 2*c->ic_maxregpower;
156 setbit(ic->ic_chan_avail, c->ic_ieee);
157 /*
158 * Identify mode capabilities.
159 */
160 if (IEEE80211_IS_CHAN_A(c))
161 setbit(ic->ic_modecaps, IEEE80211_MODE_11A);
162 if (IEEE80211_IS_CHAN_B(c))
163 setbit(ic->ic_modecaps, IEEE80211_MODE_11B);
164 if (IEEE80211_IS_CHAN_ANYG(c))
165 setbit(ic->ic_modecaps, IEEE80211_MODE_11G);
166 if (IEEE80211_IS_CHAN_FHSS(c))
167 setbit(ic->ic_modecaps, IEEE80211_MODE_FH);
168 if (IEEE80211_IS_CHAN_108A(c))
169 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A);
170 if (IEEE80211_IS_CHAN_108G(c))
171 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G);
172 if (IEEE80211_IS_CHAN_ST(c))
173 setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A);
174 if (IEEE80211_IS_CHAN_HALF(c))
175 setbit(ic->ic_modecaps, IEEE80211_MODE_HALF);
176 if (IEEE80211_IS_CHAN_QUARTER(c))
177 setbit(ic->ic_modecaps, IEEE80211_MODE_QUARTER);
178 if (IEEE80211_IS_CHAN_HTA(c))
179 setbit(ic->ic_modecaps, IEEE80211_MODE_11NA);
180 if (IEEE80211_IS_CHAN_HTG(c))
181 setbit(ic->ic_modecaps, IEEE80211_MODE_11NG);
182 }
183 /* initialize candidate channels to all available */
184 memcpy(ic->ic_chan_active, ic->ic_chan_avail,
185 sizeof(ic->ic_chan_avail));
186
187 /* sort channel table to allow lookup optimizations */
188 ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans);
189
190 /* invalidate any previous state */
191 ic->ic_bsschan = IEEE80211_CHAN_ANYC;
192 ic->ic_prevchan = NULL;
193 ic->ic_csa_newchan = NULL;
194 /* arbitrarily pick the first channel */
195 ic->ic_curchan = &ic->ic_channels[0];
196 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
197
198 /* fillin well-known rate sets if driver has not specified */
199 DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b);
200 DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g);
201 DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a);
202 DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a);
203 DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g);
204 DEFAULTRATES(IEEE80211_MODE_STURBO_A, ieee80211_rateset_11a);
205 DEFAULTRATES(IEEE80211_MODE_HALF, ieee80211_rateset_half);
206 DEFAULTRATES(IEEE80211_MODE_QUARTER, ieee80211_rateset_quarter);
207 DEFAULTRATES(IEEE80211_MODE_11NA, ieee80211_rateset_11a);
208 DEFAULTRATES(IEEE80211_MODE_11NG, ieee80211_rateset_11g);
209
210 /*
211 * Setup required information to fill the mcsset field, if driver did
212 * not. Assume a 2T2R setup for historic reasons.
213 */
214 if (ic->ic_rxstream == 0)
215 ic->ic_rxstream = 2;
216 if (ic->ic_txstream == 0)
217 ic->ic_txstream = 2;
218
219 /*
220 * Set auto mode to reset active channel state and any desired channel.
221 */
222 (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO);
223#undef DEFAULTRATES
224}
225
226static void
227null_update_mcast(struct ieee80211com *ic)
228{
229
230 ic_printf(ic, "need multicast update callback\n");
231}
232
233static void
234null_update_promisc(struct ieee80211com *ic)
235{
236
237 ic_printf(ic, "need promiscuous mode update callback\n");
238}
239
240static void
241null_update_chw(struct ieee80211com *ic)
242{
243
244 ic_printf(ic, "%s: need callback\n", __func__);
245}
246
247int
248ic_printf(struct ieee80211com *ic, const char * fmt, ...)
249{
250 va_list ap;
251 int retval;
252
253 retval = printf("%s: ", ic->ic_name);
254 va_start(ap, fmt);
255 retval += vprintf(fmt, ap);
256 va_end(ap);
257 return (retval);
258}
259
260static LIST_HEAD(, ieee80211com) ic_head = LIST_HEAD_INITIALIZER(ic_head);
261static struct mtx ic_list_mtx;
262MTX_SYSINIT(ic_list, &ic_list_mtx, "ieee80211com list", MTX_DEF);
263
264static int
265sysctl_ieee80211coms(SYSCTL_HANDLER_ARGS)
266{
267 struct ieee80211com *ic;
268 struct sbuf *sb;
269 char *sp;
270 int error;
271
272 sb = sbuf_new_auto();
273 sp = "";
274 mtx_lock(&ic_list_mtx);
275 LIST_FOREACH(ic, &ic_head, ic_next) {
276 sbuf_printf(sb, "%s%s", sp, ic->ic_name);
277 sp = " ";
278 }
279 mtx_unlock(&ic_list_mtx);
280 sbuf_finish(sb);
281 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1);
282 sbuf_delete(sb);
283 return (error);
284}
285
286SYSCTL_PROC(_net_wlan, OID_AUTO, devices,
287 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0,
288 sysctl_ieee80211coms, "A", "names of available 802.11 devices");
289
290/*
291 * Attach/setup the common net80211 state. Called by
292 * the driver on attach to prior to creating any vap's.
293 */
294void
295ieee80211_ifattach(struct ieee80211com *ic)
296{
297
298 IEEE80211_LOCK_INIT(ic, ic->ic_name);
299 IEEE80211_TX_LOCK_INIT(ic, ic->ic_name);
300 TAILQ_INIT(&ic->ic_vaps);
301
302 /* Create a taskqueue for all state changes */
303 ic->ic_tq = taskqueue_create("ic_taskq", M_WAITOK | M_ZERO,
304 taskqueue_thread_enqueue, &ic->ic_tq);
305 taskqueue_start_threads(&ic->ic_tq, 1, PI_NET, "%s net80211 taskq",
306 ic->ic_name);
307 ic->ic_ierrors = counter_u64_alloc(M_WAITOK);
308 ic->ic_oerrors = counter_u64_alloc(M_WAITOK);
309 /*
310 * Fill in 802.11 available channel set, mark all
311 * available channels as active, and pick a default
312 * channel if not already specified.
313 */
314 ieee80211_chan_init(ic);
315
316 ic->ic_update_mcast = null_update_mcast;
317 ic->ic_update_promisc = null_update_promisc;
318 ic->ic_update_chw = null_update_chw;
319
320 ic->ic_hash_key = arc4random();
321 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT;
322 ic->ic_lintval = ic->ic_bintval;
323 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX;
324
325 ieee80211_crypto_attach(ic);
326 ieee80211_node_attach(ic);
327 ieee80211_power_attach(ic);
328 ieee80211_proto_attach(ic);
329#ifdef IEEE80211_SUPPORT_SUPERG
330 ieee80211_superg_attach(ic);
331#endif
332 ieee80211_ht_attach(ic);
333 ieee80211_scan_attach(ic);
334 ieee80211_regdomain_attach(ic);
335 ieee80211_dfs_attach(ic);
336
337 ieee80211_sysctl_attach(ic);
338
339 mtx_lock(&ic_list_mtx);
340 LIST_INSERT_HEAD(&ic_head, ic, ic_next);
341 mtx_unlock(&ic_list_mtx);
342}
343
344/*
345 * Detach net80211 state on device detach. Tear down
346 * all vap's and reclaim all common state prior to the
347 * device state going away. Note we may call back into
348 * driver; it must be prepared for this.
349 */
350void
351ieee80211_ifdetach(struct ieee80211com *ic)
352{
353 struct ieee80211vap *vap;
354
355 mtx_lock(&ic_list_mtx);
356 LIST_REMOVE(ic, ic_next);
357 mtx_unlock(&ic_list_mtx);
358
359 /*
360 * The VAP is responsible for setting and clearing
361 * the VIMAGE context.
362 */
363 while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL)
364 ieee80211_vap_destroy(vap);
365 ieee80211_waitfor_parent(ic);
366
367 ieee80211_sysctl_detach(ic);
368 ieee80211_dfs_detach(ic);
369 ieee80211_regdomain_detach(ic);
370 ieee80211_scan_detach(ic);
371#ifdef IEEE80211_SUPPORT_SUPERG
372 ieee80211_superg_detach(ic);
373#endif
374 ieee80211_ht_detach(ic);
375 /* NB: must be called before ieee80211_node_detach */
376 ieee80211_proto_detach(ic);
377 ieee80211_crypto_detach(ic);
378 ieee80211_power_detach(ic);
379 ieee80211_node_detach(ic);
380
381 counter_u64_free(ic->ic_ierrors);
382 counter_u64_free(ic->ic_oerrors);
383
384 taskqueue_free(ic->ic_tq);
385 IEEE80211_TX_LOCK_DESTROY(ic);
386 IEEE80211_LOCK_DESTROY(ic);
387}
388
389struct ieee80211com *
390ieee80211_find_com(const char *name)
391{
392 struct ieee80211com *ic;
393
394 mtx_lock(&ic_list_mtx);
395 LIST_FOREACH(ic, &ic_head, ic_next)
396 if (strcmp(ic->ic_name, name) == 0)
397 break;
398 mtx_unlock(&ic_list_mtx);
399
400 return (ic);
401}
402
403/*
404 * Default reset method for use with the ioctl support. This
405 * method is invoked after any state change in the 802.11
406 * layer that should be propagated to the hardware but not
407 * require re-initialization of the 802.11 state machine (e.g
408 * rescanning for an ap). We always return ENETRESET which
409 * should cause the driver to re-initialize the device. Drivers
410 * can override this method to implement more optimized support.
411 */
412static int
413default_reset(struct ieee80211vap *vap, u_long cmd)
414{
415 return ENETRESET;
416}
417
418/*
419 * Add underlying device errors to vap errors.
420 */
421static uint64_t
422ieee80211_get_counter(struct ifnet *ifp, ift_counter cnt)
423{
424 struct ieee80211vap *vap = ifp->if_softc;
425 struct ieee80211com *ic = vap->iv_ic;
426 uint64_t rv;
427
428 rv = if_get_counter_default(ifp, cnt);
429 switch (cnt) {
430 case IFCOUNTER_OERRORS:
431 rv += counter_u64_fetch(ic->ic_oerrors);
432 break;
433 case IFCOUNTER_IERRORS:
434 rv += counter_u64_fetch(ic->ic_ierrors);
435 break;
436 default:
437 break;
438 }
439
440 return (rv);
441}
442
443/*
444 * Prepare a vap for use. Drivers use this call to
445 * setup net80211 state in new vap's prior attaching
446 * them with ieee80211_vap_attach (below).
447 */
448int
449ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap,
450 const char name[IFNAMSIZ], int unit, enum ieee80211_opmode opmode,
451 int flags, const uint8_t bssid[IEEE80211_ADDR_LEN])
452{
453 struct ifnet *ifp;
454
455 ifp = if_alloc(IFT_ETHER);
456 if (ifp == NULL) {
457 ic_printf(ic, "%s: unable to allocate ifnet\n",
458 __func__);
459 return ENOMEM;
460 }
461 if_initname(ifp, name, unit);
462 ifp->if_softc = vap; /* back pointer */
463 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
464 ifp->if_transmit = ieee80211_vap_transmit;
465 ifp->if_qflush = ieee80211_vap_qflush;
466 ifp->if_ioctl = ieee80211_ioctl;
467 ifp->if_init = ieee80211_init;
468 ifp->if_get_counter = ieee80211_get_counter;
469
470 vap->iv_ifp = ifp;
471 vap->iv_ic = ic;
472 vap->iv_flags = ic->ic_flags; /* propagate common flags */
473 vap->iv_flags_ext = ic->ic_flags_ext;
474 vap->iv_flags_ven = ic->ic_flags_ven;
475 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE;
476 vap->iv_htcaps = ic->ic_htcaps;
477 vap->iv_htextcaps = ic->ic_htextcaps;
478 vap->iv_opmode = opmode;
479 vap->iv_caps |= ieee80211_opcap[opmode];
480 vap->iv_myaddr = ic->ic_macaddr;
481 switch (opmode) {
482 case IEEE80211_M_WDS:
483 /*
484 * WDS links must specify the bssid of the far end.
485 * For legacy operation this is a static relationship.
486 * For non-legacy operation the station must associate
487 * and be authorized to pass traffic. Plumbing the
488 * vap to the proper node happens when the vap
489 * transitions to RUN state.
490 */
491 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid);
492 vap->iv_flags |= IEEE80211_F_DESBSSID;
493 if (flags & IEEE80211_CLONE_WDSLEGACY)
494 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY;
495 break;
496#ifdef IEEE80211_SUPPORT_TDMA
497 case IEEE80211_M_AHDEMO:
498 if (flags & IEEE80211_CLONE_TDMA) {
499 /* NB: checked before clone operation allowed */
500 KASSERT(ic->ic_caps & IEEE80211_C_TDMA,
501 ("not TDMA capable, ic_caps 0x%x", ic->ic_caps));
502 /*
503 * Propagate TDMA capability to mark vap; this
504 * cannot be removed and is used to distinguish
505 * regular ahdemo operation from ahdemo+tdma.
506 */
507 vap->iv_caps |= IEEE80211_C_TDMA;
508 }
509 break;
510#endif
511 default:
512 break;
513 }
514 /* auto-enable s/w beacon miss support */
515 if (flags & IEEE80211_CLONE_NOBEACONS)
516 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS;
517 /* auto-generated or user supplied MAC address */
518 if (flags & (IEEE80211_CLONE_BSSID|IEEE80211_CLONE_MACADDR))
519 vap->iv_flags_ext |= IEEE80211_FEXT_UNIQMAC;
520 /*
521 * Enable various functionality by default if we're
522 * capable; the driver can override us if it knows better.
523 */
524 if (vap->iv_caps & IEEE80211_C_WME)
525 vap->iv_flags |= IEEE80211_F_WME;
526 if (vap->iv_caps & IEEE80211_C_BURST)
527 vap->iv_flags |= IEEE80211_F_BURST;
528 /* NB: bg scanning only makes sense for station mode right now */
529 if (vap->iv_opmode == IEEE80211_M_STA &&
530 (vap->iv_caps & IEEE80211_C_BGSCAN))
531 vap->iv_flags |= IEEE80211_F_BGSCAN;
532 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */
533 /* NB: DFS support only makes sense for ap mode right now */
534 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
535 (vap->iv_caps & IEEE80211_C_DFS))
536 vap->iv_flags_ext |= IEEE80211_FEXT_DFS;
537
538 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */
539 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT;
540 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT;
541 /*
542 * Install a default reset method for the ioctl support;
543 * the driver can override this.
544 */
545 vap->iv_reset = default_reset;
546
547 ieee80211_sysctl_vattach(vap);
548 ieee80211_crypto_vattach(vap);
549 ieee80211_node_vattach(vap);
550 ieee80211_power_vattach(vap);
551 ieee80211_proto_vattach(vap);
552#ifdef IEEE80211_SUPPORT_SUPERG
553 ieee80211_superg_vattach(vap);
554#endif
555 ieee80211_ht_vattach(vap);
556 ieee80211_scan_vattach(vap);
557 ieee80211_regdomain_vattach(vap);
558 ieee80211_radiotap_vattach(vap);
559 ieee80211_ratectl_set(vap, IEEE80211_RATECTL_NONE);
560
561 return 0;
562}
563
564/*
565 * Activate a vap. State should have been prepared with a
566 * call to ieee80211_vap_setup and by the driver. On return
567 * from this call the vap is ready for use.
568 */
569int
570ieee80211_vap_attach(struct ieee80211vap *vap, ifm_change_cb_t media_change,
571 ifm_stat_cb_t media_stat, const uint8_t macaddr[IEEE80211_ADDR_LEN])
572{
573 struct ifnet *ifp = vap->iv_ifp;
574 struct ieee80211com *ic = vap->iv_ic;
575 struct ifmediareq imr;
576 int maxrate;
577
578 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
579 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n",
580 __func__, ieee80211_opmode_name[vap->iv_opmode],
581 ic->ic_name, vap->iv_flags, vap->iv_flags_ext);
582
583 /*
584 * Do late attach work that cannot happen until after
585 * the driver has had a chance to override defaults.
586 */
587 ieee80211_node_latevattach(vap);
588 ieee80211_power_latevattach(vap);
589
590 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps,
591 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat);
592 ieee80211_media_status(ifp, &imr);
593 /* NB: strip explicit mode; we're actually in autoselect */
594 ifmedia_set(&vap->iv_media,
595 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO));
596 if (maxrate)
597 ifp->if_baudrate = IF_Mbps(maxrate);
598
599 ether_ifattach(ifp, macaddr);
600 vap->iv_myaddr = IF_LLADDR(ifp);
601 /* hook output method setup by ether_ifattach */
602 vap->iv_output = ifp->if_output;
603 ifp->if_output = ieee80211_output;
604 /* NB: if_mtu set by ether_ifattach to ETHERMTU */
605
606 IEEE80211_LOCK(ic);
607 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next);
608 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
609#ifdef IEEE80211_SUPPORT_SUPERG
610 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
611#endif
612 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
613 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
614 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
615 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
616 IEEE80211_UNLOCK(ic);
617
618 return 1;
619}
620
621/*
622 * Tear down vap state and reclaim the ifnet.
623 * The driver is assumed to have prepared for
624 * this; e.g. by turning off interrupts for the
625 * underlying device.
626 */
627void
628ieee80211_vap_detach(struct ieee80211vap *vap)
629{
630 struct ieee80211com *ic = vap->iv_ic;
631 struct ifnet *ifp = vap->iv_ifp;
632
633 CURVNET_SET(ifp->if_vnet);
634
635 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n",
636 __func__, ieee80211_opmode_name[vap->iv_opmode], ic->ic_name);
637
638 /* NB: bpfdetach is called by ether_ifdetach and claims all taps */
639 ether_ifdetach(ifp);
640
641 ieee80211_stop(vap);
642
643 /*
644 * Flush any deferred vap tasks.
645 */
646 ieee80211_draintask(ic, &vap->iv_nstate_task);
647 ieee80211_draintask(ic, &vap->iv_swbmiss_task);
648
649 /* XXX band-aid until ifnet handles this for us */
650 taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
651
652 IEEE80211_LOCK(ic);
653 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running"));
654 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next);
655 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
656#ifdef IEEE80211_SUPPORT_SUPERG
657 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
658#endif
659 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
660 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
661 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
662 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
663 /* NB: this handles the bpfdetach done below */
664 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF);
665 if (vap->iv_ifflags & IFF_PROMISC)
666 ieee80211_promisc(vap, false);
667 if (vap->iv_ifflags & IFF_ALLMULTI)
668 ieee80211_allmulti(vap, false);
669 IEEE80211_UNLOCK(ic);
670
671 ifmedia_removeall(&vap->iv_media);
672
673 ieee80211_radiotap_vdetach(vap);
674 ieee80211_regdomain_vdetach(vap);
675 ieee80211_scan_vdetach(vap);
676#ifdef IEEE80211_SUPPORT_SUPERG
677 ieee80211_superg_vdetach(vap);
678#endif
679 ieee80211_ht_vdetach(vap);
680 /* NB: must be before ieee80211_node_vdetach */
681 ieee80211_proto_vdetach(vap);
682 ieee80211_crypto_vdetach(vap);
683 ieee80211_power_vdetach(vap);
684 ieee80211_node_vdetach(vap);
685 ieee80211_sysctl_vdetach(vap);
686
687 if_free(ifp);
688
689 CURVNET_RESTORE();
690}
691
692/*
693 * Count number of vaps in promisc, and issue promisc on
694 * parent respectively.
695 */
696void
697ieee80211_promisc(struct ieee80211vap *vap, bool on)
698{
699 struct ieee80211com *ic = vap->iv_ic;
700
701 /*
702 * XXX the bridge sets PROMISC but we don't want to
703 * enable it on the device, discard here so all the
704 * drivers don't need to special-case it
705 */
706 if (!(vap->iv_opmode == IEEE80211_M_MONITOR ||
707 (vap->iv_opmode == IEEE80211_M_AHDEMO &&
708 (vap->iv_caps & IEEE80211_C_TDMA) == 0)))
709 return;
710
711 IEEE80211_LOCK(ic);
712 if (on) {
713 if (++ic->ic_promisc == 1)
714 ieee80211_runtask(ic, &ic->ic_promisc_task);
715 } else {
716 KASSERT(ic->ic_promisc > 0, ("%s: ic %p not promisc",
717 __func__, ic));
718 if (--ic->ic_promisc == 0)
719 ieee80211_runtask(ic, &ic->ic_promisc_task);
720 }
721 IEEE80211_UNLOCK(ic);
722}
723
724/*
725 * Count number of vaps in allmulti, and issue allmulti on
726 * parent respectively.
727 */
728void
729ieee80211_allmulti(struct ieee80211vap *vap, bool on)
730{
731 struct ieee80211com *ic = vap->iv_ic;
732
733 IEEE80211_LOCK(ic);
734 if (on) {
735 if (++ic->ic_allmulti == 1)
736 ieee80211_runtask(ic, &ic->ic_mcast_task);
737 } else {
738 KASSERT(ic->ic_allmulti > 0, ("%s: ic %p not allmulti",
739 __func__, ic));
740 if (--ic->ic_allmulti == 0)
741 ieee80211_runtask(ic, &ic->ic_mcast_task);
742 }
743 IEEE80211_UNLOCK(ic);
744}
745
746/*
747 * Synchronize flag bit state in the com structure
748 * according to the state of all vap's. This is used,
749 * for example, to handle state changes via ioctls.
750 */
751static void
752ieee80211_syncflag_locked(struct ieee80211com *ic, int flag)
753{
754 struct ieee80211vap *vap;
755 int bit;
756
757 IEEE80211_LOCK_ASSERT(ic);
758
759 bit = 0;
760 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
761 if (vap->iv_flags & flag) {
762 bit = 1;
763 break;
764 }
765 if (bit)
766 ic->ic_flags |= flag;
767 else
768 ic->ic_flags &= ~flag;
769}
770
771void
772ieee80211_syncflag(struct ieee80211vap *vap, int flag)
773{
774 struct ieee80211com *ic = vap->iv_ic;
775
776 IEEE80211_LOCK(ic);
777 if (flag < 0) {
778 flag = -flag;
779 vap->iv_flags &= ~flag;
780 } else
781 vap->iv_flags |= flag;
782 ieee80211_syncflag_locked(ic, flag);
783 IEEE80211_UNLOCK(ic);
784}
785
786/*
787 * Synchronize flags_ht bit state in the com structure
788 * according to the state of all vap's. This is used,
789 * for example, to handle state changes via ioctls.
790 */
791static void
792ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag)
793{
794 struct ieee80211vap *vap;
795 int bit;
796
797 IEEE80211_LOCK_ASSERT(ic);
798
799 bit = 0;
800 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
801 if (vap->iv_flags_ht & flag) {
802 bit = 1;
803 break;
804 }
805 if (bit)
806 ic->ic_flags_ht |= flag;
807 else
808 ic->ic_flags_ht &= ~flag;
809}
810
811void
812ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag)
813{
814 struct ieee80211com *ic = vap->iv_ic;
815
816 IEEE80211_LOCK(ic);
817 if (flag < 0) {
818 flag = -flag;
819 vap->iv_flags_ht &= ~flag;
820 } else
821 vap->iv_flags_ht |= flag;
822 ieee80211_syncflag_ht_locked(ic, flag);
823 IEEE80211_UNLOCK(ic);
824}
825
826/*
827 * Synchronize flags_ext bit state in the com structure
828 * according to the state of all vap's. This is used,
829 * for example, to handle state changes via ioctls.
830 */
831static void
832ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag)
833{
834 struct ieee80211vap *vap;
835 int bit;
836
837 IEEE80211_LOCK_ASSERT(ic);
838
839 bit = 0;
840 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
841 if (vap->iv_flags_ext & flag) {
842 bit = 1;
843 break;
844 }
845 if (bit)
846 ic->ic_flags_ext |= flag;
847 else
848 ic->ic_flags_ext &= ~flag;
849}
850
851void
852ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag)
853{
854 struct ieee80211com *ic = vap->iv_ic;
855
856 IEEE80211_LOCK(ic);
857 if (flag < 0) {
858 flag = -flag;
859 vap->iv_flags_ext &= ~flag;
860 } else
861 vap->iv_flags_ext |= flag;
862 ieee80211_syncflag_ext_locked(ic, flag);
863 IEEE80211_UNLOCK(ic);
864}
865
866static __inline int
867mapgsm(u_int freq, u_int flags)
868{
869 freq *= 10;
870 if (flags & IEEE80211_CHAN_QUARTER)
871 freq += 5;
872 else if (flags & IEEE80211_CHAN_HALF)
873 freq += 10;
874 else
875 freq += 20;
876 /* NB: there is no 907/20 wide but leave room */
877 return (freq - 906*10) / 5;
878}
879
880static __inline int
881mappsb(u_int freq, u_int flags)
882{
883 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5;
884}
885
886/*
887 * Convert MHz frequency to IEEE channel number.
888 */
889int
890ieee80211_mhz2ieee(u_int freq, u_int flags)
891{
892#define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990)
893 if (flags & IEEE80211_CHAN_GSM)
894 return mapgsm(freq, flags);
895 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
896 if (freq == 2484)
897 return 14;
898 if (freq < 2484)
899 return ((int) freq - 2407) / 5;
900 else
901 return 15 + ((freq - 2512) / 20);
902 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */
903 if (freq <= 5000) {
904 /* XXX check regdomain? */
905 if (IS_FREQ_IN_PSB(freq))
906 return mappsb(freq, flags);
907 return (freq - 4000) / 5;
908 } else
909 return (freq - 5000) / 5;
910 } else { /* either, guess */
911 if (freq == 2484)
912 return 14;
913 if (freq < 2484) {
914 if (907 <= freq && freq <= 922)
915 return mapgsm(freq, flags);
916 return ((int) freq - 2407) / 5;
917 }
918 if (freq < 5000) {
919 if (IS_FREQ_IN_PSB(freq))
920 return mappsb(freq, flags);
921 else if (freq > 4900)
922 return (freq - 4000) / 5;
923 else
924 return 15 + ((freq - 2512) / 20);
925 }
926 return (freq - 5000) / 5;
927 }
928#undef IS_FREQ_IN_PSB
929}
930
931/*
932 * Convert channel to IEEE channel number.
933 */
934int
935ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c)
936{
937 if (c == NULL) {
938 ic_printf(ic, "invalid channel (NULL)\n");
939 return 0; /* XXX */
940 }
941 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee);
942}
943
944/*
945 * Convert IEEE channel number to MHz frequency.
946 */
947u_int
948ieee80211_ieee2mhz(u_int chan, u_int flags)
949{
950 if (flags & IEEE80211_CHAN_GSM)
951 return 907 + 5 * (chan / 10);
952 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
953 if (chan == 14)
954 return 2484;
955 if (chan < 14)
956 return 2407 + chan*5;
957 else
958 return 2512 + ((chan-15)*20);
959 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */
960 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) {
961 chan -= 37;
962 return 4940 + chan*5 + (chan % 5 ? 2 : 0);
963 }
964 return 5000 + (chan*5);
965 } else { /* either, guess */
966 /* XXX can't distinguish PSB+GSM channels */
967 if (chan == 14)
968 return 2484;
969 if (chan < 14) /* 0-13 */
970 return 2407 + chan*5;
971 if (chan < 27) /* 15-26 */
972 return 2512 + ((chan-15)*20);
973 return 5000 + (chan*5);
974 }
975}
976
977/*
978 * Locate a channel given a frequency+flags. We cache
979 * the previous lookup to optimize switching between two
980 * channels--as happens with dynamic turbo.
981 */
982struct ieee80211_channel *
983ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags)
984{
985 struct ieee80211_channel *c;
986 int i;
987
988 flags &= IEEE80211_CHAN_ALLTURBO;
989 c = ic->ic_prevchan;
990 if (c != NULL && c->ic_freq == freq &&
991 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
992 return c;
993 /* brute force search */
994 for (i = 0; i < ic->ic_nchans; i++) {
995 c = &ic->ic_channels[i];
996 if (c->ic_freq == freq &&
997 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
998 return c;
999 }
1000 return NULL;
1001}
1002
1003/*
1004 * Locate a channel given a channel number+flags. We cache
1005 * the previous lookup to optimize switching between two
1006 * channels--as happens with dynamic turbo.
1007 */
1008struct ieee80211_channel *
1009ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags)
1010{
1011 struct ieee80211_channel *c;
1012 int i;
1013
1014 flags &= IEEE80211_CHAN_ALLTURBO;
1015 c = ic->ic_prevchan;
1016 if (c != NULL && c->ic_ieee == ieee &&
1017 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
1018 return c;
1019 /* brute force search */
1020 for (i = 0; i < ic->ic_nchans; i++) {
1021 c = &ic->ic_channels[i];
1022 if (c->ic_ieee == ieee &&
1023 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
1024 return c;
1025 }
1026 return NULL;
1027}
1028
1029/*
1030 * Lookup a channel suitable for the given rx status.
1031 *
1032 * This is used to find a channel for a frame (eg beacon, probe
1033 * response) based purely on the received PHY information.
1034 *
1035 * For now it tries to do it based on R_FREQ / R_IEEE.
1036 * This is enough for 11bg and 11a (and thus 11ng/11na)
1037 * but it will not be enough for GSM, PSB channels and the
1038 * like. It also doesn't know about legacy-turbog and
1039 * legacy-turbo modes, which some offload NICs actually
1040 * support in weird ways.
1041 *
1042 * Takes the ic and rxstatus; returns the channel or NULL
1043 * if not found.
1044 *
1045 * XXX TODO: Add support for that when the need arises.
1046 */
1047struct ieee80211_channel *
1048ieee80211_lookup_channel_rxstatus(struct ieee80211vap *vap,
1049 const struct ieee80211_rx_stats *rxs)
1050{
1051 struct ieee80211com *ic = vap->iv_ic;
1052 uint32_t flags;
1053 struct ieee80211_channel *c;
1054
1055 if (rxs == NULL)
1056 return (NULL);
1057
1058 /*
1059 * Strictly speaking we only use freq for now,
1060 * however later on we may wish to just store
1061 * the ieee for verification.
1062 */
1063 if ((rxs->r_flags & IEEE80211_R_FREQ) == 0)
1064 return (NULL);
1065 if ((rxs->r_flags & IEEE80211_R_IEEE) == 0)
1066 return (NULL);
1067
1068 /*
1069 * If the rx status contains a valid ieee/freq, then
1070 * ensure we populate the correct channel information
1071 * in rxchan before passing it up to the scan infrastructure.
1072 * Offload NICs will pass up beacons from all channels
1073 * during background scans.
1074 */
1075
1076 /* Determine a band */
1077 /* XXX should be done by the driver? */
1078 if (rxs->c_freq < 3000) {
1079 flags = IEEE80211_CHAN_G;
1080 } else {
1081 flags = IEEE80211_CHAN_A;
1082 }
1083
1084 /* Channel lookup */
1085 c = ieee80211_find_channel(ic, rxs->c_freq, flags);
1086
1087 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INPUT,
1088 "%s: freq=%d, ieee=%d, flags=0x%08x; c=%p\n",
1089 __func__,
1090 (int) rxs->c_freq,
1091 (int) rxs->c_ieee,
1092 flags,
1093 c);
1094
1095 return (c);
1096}
1097
1098static void
1099addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword)
1100{
1101#define ADD(_ic, _s, _o) \
1102 ifmedia_add(media, \
1103 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL)
1104 static const u_int mopts[IEEE80211_MODE_MAX] = {
1105 [IEEE80211_MODE_AUTO] = IFM_AUTO,
1106 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A,
1107 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B,
1108 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G,
1109 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH,
1110 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
1111 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO,
1112 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
1113 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */
1114 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */
1115 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA,
1116 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG,
1117 };
1118 u_int mopt;
1119
1120 mopt = mopts[mode];
1121 if (addsta)
1122 ADD(ic, mword, mopt); /* STA mode has no cap */
1123 if (caps & IEEE80211_C_IBSS)
1124 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC);
1125 if (caps & IEEE80211_C_HOSTAP)
1126 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP);
1127 if (caps & IEEE80211_C_AHDEMO)
1128 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0);
1129 if (caps & IEEE80211_C_MONITOR)
1130 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR);
1131 if (caps & IEEE80211_C_WDS)
1132 ADD(media, mword, mopt | IFM_IEEE80211_WDS);
1133 if (caps & IEEE80211_C_MBSS)
1134 ADD(media, mword, mopt | IFM_IEEE80211_MBSS);
1135#undef ADD
1136}
1137
1138/*
1139 * Setup the media data structures according to the channel and
1140 * rate tables.
1141 */
1142static int
1143ieee80211_media_setup(struct ieee80211com *ic,
1144 struct ifmedia *media, int caps, int addsta,
1145 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
1146{
1147 int i, j, rate, maxrate, mword, r;
1148 enum ieee80211_phymode mode;
1149 const struct ieee80211_rateset *rs;
1150 struct ieee80211_rateset allrates;
1151
1152 /*
1153 * Fill in media characteristics.
1154 */
1155 ifmedia_init(media, 0, media_change, media_stat);
1156 maxrate = 0;
1157 /*
1158 * Add media for legacy operating modes.
1159 */
1160 memset(&allrates, 0, sizeof(allrates));
1161 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) {
1162 if (isclr(ic->ic_modecaps, mode))
1163 continue;
1164 addmedia(media, caps, addsta, mode, IFM_AUTO);
1165 if (mode == IEEE80211_MODE_AUTO)
1166 continue;
1167 rs = &ic->ic_sup_rates[mode];
1168 for (i = 0; i < rs->rs_nrates; i++) {
1169 rate = rs->rs_rates[i];
1170 mword = ieee80211_rate2media(ic, rate, mode);
1171 if (mword == 0)
1172 continue;
1173 addmedia(media, caps, addsta, mode, mword);
1174 /*
1175 * Add legacy rate to the collection of all rates.
1176 */
1177 r = rate & IEEE80211_RATE_VAL;
1178 for (j = 0; j < allrates.rs_nrates; j++)
1179 if (allrates.rs_rates[j] == r)
1180 break;
1181 if (j == allrates.rs_nrates) {
1182 /* unique, add to the set */
1183 allrates.rs_rates[j] = r;
1184 allrates.rs_nrates++;
1185 }
1186 rate = (rate & IEEE80211_RATE_VAL) / 2;
1187 if (rate > maxrate)
1188 maxrate = rate;
1189 }
1190 }
1191 for (i = 0; i < allrates.rs_nrates; i++) {
1192 mword = ieee80211_rate2media(ic, allrates.rs_rates[i],
1193 IEEE80211_MODE_AUTO);
1194 if (mword == 0)
1195 continue;
1196 /* NB: remove media options from mword */
1197 addmedia(media, caps, addsta,
1198 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword));
1199 }
1200 /*
1201 * Add HT/11n media. Note that we do not have enough
1202 * bits in the media subtype to express the MCS so we
1203 * use a "placeholder" media subtype and any fixed MCS
1204 * must be specified with a different mechanism.
1205 */
1206 for (; mode <= IEEE80211_MODE_11NG; mode++) {
1207 if (isclr(ic->ic_modecaps, mode))
1208 continue;
1209 addmedia(media, caps, addsta, mode, IFM_AUTO);
1210 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS);
1211 }
1212 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) ||
1213 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) {
1214 addmedia(media, caps, addsta,
1215 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS);
1216 i = ic->ic_txstream * 8 - 1;
1217 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) &&
1218 (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40))
1219 rate = ieee80211_htrates[i].ht40_rate_400ns;
1220 else if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40))
1221 rate = ieee80211_htrates[i].ht40_rate_800ns;
1222 else if ((ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20))
1223 rate = ieee80211_htrates[i].ht20_rate_400ns;
1224 else
1225 rate = ieee80211_htrates[i].ht20_rate_800ns;
1226 if (rate > maxrate)
1227 maxrate = rate;
1228 }
1229 return maxrate;
1230}
1231
1232/* XXX inline or eliminate? */
1233const struct ieee80211_rateset *
1234ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c)
1235{
1236 /* XXX does this work for 11ng basic rates? */
1237 return &ic->ic_sup_rates[ieee80211_chan2mode(c)];
1238}
1239
1240void
1241ieee80211_announce(struct ieee80211com *ic)
1242{
1243 int i, rate, mword;
1244 enum ieee80211_phymode mode;
1245 const struct ieee80211_rateset *rs;
1246
1247 /* NB: skip AUTO since it has no rates */
1248 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) {
1249 if (isclr(ic->ic_modecaps, mode))
1250 continue;
1251 ic_printf(ic, "%s rates: ", ieee80211_phymode_name[mode]);
1252 rs = &ic->ic_sup_rates[mode];
1253 for (i = 0; i < rs->rs_nrates; i++) {
1254 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode);
1255 if (mword == 0)
1256 continue;
1257 rate = ieee80211_media2rate(mword);
1258 printf("%s%d%sMbps", (i != 0 ? " " : ""),
1259 rate / 2, ((rate & 0x1) != 0 ? ".5" : ""));
1260 }
1261 printf("\n");
1262 }
1263 ieee80211_ht_announce(ic);
1264}
1265
1266void
1267ieee80211_announce_channels(struct ieee80211com *ic)
1268{
1269 const struct ieee80211_channel *c;
1270 char type;
1271 int i, cw;
1272
1273 printf("Chan Freq CW RegPwr MinPwr MaxPwr\n");
1274 for (i = 0; i < ic->ic_nchans; i++) {
1275 c = &ic->ic_channels[i];
1276 if (IEEE80211_IS_CHAN_ST(c))
1277 type = 'S';
1278 else if (IEEE80211_IS_CHAN_108A(c))
1279 type = 'T';
1280 else if (IEEE80211_IS_CHAN_108G(c))
1281 type = 'G';
1282 else if (IEEE80211_IS_CHAN_HT(c))
1283 type = 'n';
1284 else if (IEEE80211_IS_CHAN_A(c))
1285 type = 'a';
1286 else if (IEEE80211_IS_CHAN_ANYG(c))
1287 type = 'g';
1288 else if (IEEE80211_IS_CHAN_B(c))
1289 type = 'b';
1290 else
1291 type = 'f';
1292 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c))
1293 cw = 40;
1294 else if (IEEE80211_IS_CHAN_HALF(c))
1295 cw = 10;
1296 else if (IEEE80211_IS_CHAN_QUARTER(c))
1297 cw = 5;
1298 else
1299 cw = 20;
1300 printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n"
1301 , c->ic_ieee, c->ic_freq, type
1302 , cw
1303 , IEEE80211_IS_CHAN_HT40U(c) ? '+' :
1304 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' '
1305 , c->ic_maxregpower
1306 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0
1307 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0
1308 );
1309 }
1310}
1311
1312static int
1313media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode)
1314{
1315 switch (IFM_MODE(ime->ifm_media)) {
1316 case IFM_IEEE80211_11A:
1317 *mode = IEEE80211_MODE_11A;
1318 break;
1319 case IFM_IEEE80211_11B:
1320 *mode = IEEE80211_MODE_11B;
1321 break;
1322 case IFM_IEEE80211_11G:
1323 *mode = IEEE80211_MODE_11G;
1324 break;
1325 case IFM_IEEE80211_FH:
1326 *mode = IEEE80211_MODE_FH;
1327 break;
1328 case IFM_IEEE80211_11NA:
1329 *mode = IEEE80211_MODE_11NA;
1330 break;
1331 case IFM_IEEE80211_11NG:
1332 *mode = IEEE80211_MODE_11NG;
1333 break;
1334 case IFM_AUTO:
1335 *mode = IEEE80211_MODE_AUTO;
1336 break;
1337 default:
1338 return 0;
1339 }
1340 /*
1341 * Turbo mode is an ``option''.
1342 * XXX does not apply to AUTO
1343 */
1344 if (ime->ifm_media & IFM_IEEE80211_TURBO) {
1345 if (*mode == IEEE80211_MODE_11A) {
1346 if (flags & IEEE80211_F_TURBOP)
1347 *mode = IEEE80211_MODE_TURBO_A;
1348 else
1349 *mode = IEEE80211_MODE_STURBO_A;
1350 } else if (*mode == IEEE80211_MODE_11G)
1351 *mode = IEEE80211_MODE_TURBO_G;
1352 else
1353 return 0;
1354 }
1355 /* XXX HT40 +/- */
1356 return 1;
1357}
1358
1359/*
1360 * Handle a media change request on the vap interface.
1361 */
1362int
1363ieee80211_media_change(struct ifnet *ifp)
1364{
1365 struct ieee80211vap *vap = ifp->if_softc;
1366 struct ifmedia_entry *ime = vap->iv_media.ifm_cur;
1367 uint16_t newmode;
1368
1369 if (!media2mode(ime, vap->iv_flags, &newmode))
1370 return EINVAL;
1371 if (vap->iv_des_mode != newmode) {
1372 vap->iv_des_mode = newmode;
1373 /* XXX kick state machine if up+running */
1374 }
1375 return 0;
1376}
1377
1378/*
1379 * Common code to calculate the media status word
1380 * from the operating mode and channel state.
1381 */
1382static int
1383media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan)
1384{
1385 int status;
1386
1387 status = IFM_IEEE80211;
1388 switch (opmode) {
1389 case IEEE80211_M_STA:
1390 break;
1391 case IEEE80211_M_IBSS:
1392 status |= IFM_IEEE80211_ADHOC;
1393 break;
1394 case IEEE80211_M_HOSTAP:
1395 status |= IFM_IEEE80211_HOSTAP;
1396 break;
1397 case IEEE80211_M_MONITOR:
1398 status |= IFM_IEEE80211_MONITOR;
1399 break;
1400 case IEEE80211_M_AHDEMO:
1401 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0;
1402 break;
1403 case IEEE80211_M_WDS:
1404 status |= IFM_IEEE80211_WDS;
1405 break;
1406 case IEEE80211_M_MBSS:
1407 status |= IFM_IEEE80211_MBSS;
1408 break;
1409 }
1410 if (IEEE80211_IS_CHAN_HTA(chan)) {
1411 status |= IFM_IEEE80211_11NA;
1412 } else if (IEEE80211_IS_CHAN_HTG(chan)) {
1413 status |= IFM_IEEE80211_11NG;
1414 } else if (IEEE80211_IS_CHAN_A(chan)) {
1415 status |= IFM_IEEE80211_11A;
1416 } else if (IEEE80211_IS_CHAN_B(chan)) {
1417 status |= IFM_IEEE80211_11B;
1418 } else if (IEEE80211_IS_CHAN_ANYG(chan)) {
1419 status |= IFM_IEEE80211_11G;
1420 } else if (IEEE80211_IS_CHAN_FHSS(chan)) {
1421 status |= IFM_IEEE80211_FH;
1422 }
1423 /* XXX else complain? */
1424
1425 if (IEEE80211_IS_CHAN_TURBO(chan))
1426 status |= IFM_IEEE80211_TURBO;
1427#if 0
1428 if (IEEE80211_IS_CHAN_HT20(chan))
1429 status |= IFM_IEEE80211_HT20;
1430 if (IEEE80211_IS_CHAN_HT40(chan))
1431 status |= IFM_IEEE80211_HT40;
1432#endif
1433 return status;
1434}
1435
1436void
1437ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr)
1438{
1439 struct ieee80211vap *vap = ifp->if_softc;
1440 struct ieee80211com *ic = vap->iv_ic;
1441 enum ieee80211_phymode mode;
1442
1443 imr->ifm_status = IFM_AVALID;
1444 /*
1445 * NB: use the current channel's mode to lock down a xmit
1446 * rate only when running; otherwise we may have a mismatch
1447 * in which case the rate will not be convertible.
1448 */
1449 if (vap->iv_state == IEEE80211_S_RUN ||
1450 vap->iv_state == IEEE80211_S_SLEEP) {
1451 imr->ifm_status |= IFM_ACTIVE;
1452 mode = ieee80211_chan2mode(ic->ic_curchan);
1453 } else
1454 mode = IEEE80211_MODE_AUTO;
1455 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan);
1456 /*
1457 * Calculate a current rate if possible.
1458 */
1459 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) {
1460 /*
1461 * A fixed rate is set, report that.
1462 */
1463 imr->ifm_active |= ieee80211_rate2media(ic,
1464 vap->iv_txparms[mode].ucastrate, mode);
1465 } else if (vap->iv_opmode == IEEE80211_M_STA) {
1466 /*
1467 * In station mode report the current transmit rate.
1468 */
1469 imr->ifm_active |= ieee80211_rate2media(ic,
1470 vap->iv_bss->ni_txrate, mode);
1471 } else
1472 imr->ifm_active |= IFM_AUTO;
1473 if (imr->ifm_status & IFM_ACTIVE)
1474 imr->ifm_current = imr->ifm_active;
1475}
1476
1477/*
1478 * Set the current phy mode and recalculate the active channel
1479 * set based on the available channels for this mode. Also
1480 * select a new default/current channel if the current one is
1481 * inappropriate for this mode.
1482 */
1483int
1484ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode)
1485{
1486 /*
1487 * Adjust basic rates in 11b/11g supported rate set.
1488 * Note that if operating on a hal/quarter rate channel
1489 * this is a noop as those rates sets are different
1490 * and used instead.
1491 */
1492 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B)
1493 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode);
1494
1495 ic->ic_curmode = mode;
1496 ieee80211_reset_erp(ic); /* reset ERP state */
1497
1498 return 0;
1499}
1500
1501/*
1502 * Return the phy mode for with the specified channel.
1503 */
1504enum ieee80211_phymode
1505ieee80211_chan2mode(const struct ieee80211_channel *chan)
1506{
1507
1508 if (IEEE80211_IS_CHAN_HTA(chan))
1509 return IEEE80211_MODE_11NA;
1510 else if (IEEE80211_IS_CHAN_HTG(chan))
1511 return IEEE80211_MODE_11NG;
1512 else if (IEEE80211_IS_CHAN_108G(chan))
1513 return IEEE80211_MODE_TURBO_G;
1514 else if (IEEE80211_IS_CHAN_ST(chan))
1515 return IEEE80211_MODE_STURBO_A;
1516 else if (IEEE80211_IS_CHAN_TURBO(chan))
1517 return IEEE80211_MODE_TURBO_A;
1518 else if (IEEE80211_IS_CHAN_HALF(chan))
1519 return IEEE80211_MODE_HALF;
1520 else if (IEEE80211_IS_CHAN_QUARTER(chan))
1521 return IEEE80211_MODE_QUARTER;
1522 else if (IEEE80211_IS_CHAN_A(chan))
1523 return IEEE80211_MODE_11A;
1524 else if (IEEE80211_IS_CHAN_ANYG(chan))
1525 return IEEE80211_MODE_11G;
1526 else if (IEEE80211_IS_CHAN_B(chan))
1527 return IEEE80211_MODE_11B;
1528 else if (IEEE80211_IS_CHAN_FHSS(chan))
1529 return IEEE80211_MODE_FH;
1530
1531 /* NB: should not get here */
1532 printf("%s: cannot map channel to mode; freq %u flags 0x%x\n",
1533 __func__, chan->ic_freq, chan->ic_flags);
1534 return IEEE80211_MODE_11B;
1535}
1536
1537struct ratemedia {
1538 u_int match; /* rate + mode */
1539 u_int media; /* if_media rate */
1540};
1541
1542static int
1543findmedia(const struct ratemedia rates[], int n, u_int match)
1544{
1545 int i;
1546
1547 for (i = 0; i < n; i++)
1548 if (rates[i].match == match)
1549 return rates[i].media;
1550 return IFM_AUTO;
1551}
1552
1553/*
1554 * Convert IEEE80211 rate value to ifmedia subtype.
1555 * Rate is either a legacy rate in units of 0.5Mbps
1556 * or an MCS index.
1557 */
1558int
1559ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode)
1560{
1561 static const struct ratemedia rates[] = {
1562 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 },
1563 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 },
1564 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 },
1565 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 },
1566 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 },
1567 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 },
1568 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 },
1569 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 },
1570 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 },
1571 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 },
1572 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 },
1573 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 },
1574 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 },
1575 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 },
1576 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 },
1577 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 },
1578 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 },
1579 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 },
1580 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 },
1581 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 },
1582 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 },
1583 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 },
1584 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 },
1585 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 },
1586 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 },
1587 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 },
1588 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 },
1589 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 },
1590 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 },
1591 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 },
1592 /* NB: OFDM72 doesn't realy exist so we don't handle it */
1593 };
1594 static const struct ratemedia htrates[] = {
1595 { 0, IFM_IEEE80211_MCS },
1596 { 1, IFM_IEEE80211_MCS },
1597 { 2, IFM_IEEE80211_MCS },
1598 { 3, IFM_IEEE80211_MCS },
1599 { 4, IFM_IEEE80211_MCS },
1600 { 5, IFM_IEEE80211_MCS },
1601 { 6, IFM_IEEE80211_MCS },
1602 { 7, IFM_IEEE80211_MCS },
1603 { 8, IFM_IEEE80211_MCS },
1604 { 9, IFM_IEEE80211_MCS },
1605 { 10, IFM_IEEE80211_MCS },
1606 { 11, IFM_IEEE80211_MCS },
1607 { 12, IFM_IEEE80211_MCS },
1608 { 13, IFM_IEEE80211_MCS },
1609 { 14, IFM_IEEE80211_MCS },
1610 { 15, IFM_IEEE80211_MCS },
1611 { 16, IFM_IEEE80211_MCS },
1612 { 17, IFM_IEEE80211_MCS },
1613 { 18, IFM_IEEE80211_MCS },
1614 { 19, IFM_IEEE80211_MCS },
1615 { 20, IFM_IEEE80211_MCS },
1616 { 21, IFM_IEEE80211_MCS },
1617 { 22, IFM_IEEE80211_MCS },
1618 { 23, IFM_IEEE80211_MCS },
1619 { 24, IFM_IEEE80211_MCS },
1620 { 25, IFM_IEEE80211_MCS },
1621 { 26, IFM_IEEE80211_MCS },
1622 { 27, IFM_IEEE80211_MCS },
1623 { 28, IFM_IEEE80211_MCS },
1624 { 29, IFM_IEEE80211_MCS },
1625 { 30, IFM_IEEE80211_MCS },
1626 { 31, IFM_IEEE80211_MCS },
1627 { 32, IFM_IEEE80211_MCS },
1628 { 33, IFM_IEEE80211_MCS },
1629 { 34, IFM_IEEE80211_MCS },
1630 { 35, IFM_IEEE80211_MCS },
1631 { 36, IFM_IEEE80211_MCS },
1632 { 37, IFM_IEEE80211_MCS },
1633 { 38, IFM_IEEE80211_MCS },
1634 { 39, IFM_IEEE80211_MCS },
1635 { 40, IFM_IEEE80211_MCS },
1636 { 41, IFM_IEEE80211_MCS },
1637 { 42, IFM_IEEE80211_MCS },
1638 { 43, IFM_IEEE80211_MCS },
1639 { 44, IFM_IEEE80211_MCS },
1640 { 45, IFM_IEEE80211_MCS },
1641 { 46, IFM_IEEE80211_MCS },
1642 { 47, IFM_IEEE80211_MCS },
1643 { 48, IFM_IEEE80211_MCS },
1644 { 49, IFM_IEEE80211_MCS },
1645 { 50, IFM_IEEE80211_MCS },
1646 { 51, IFM_IEEE80211_MCS },
1647 { 52, IFM_IEEE80211_MCS },
1648 { 53, IFM_IEEE80211_MCS },
1649 { 54, IFM_IEEE80211_MCS },
1650 { 55, IFM_IEEE80211_MCS },
1651 { 56, IFM_IEEE80211_MCS },
1652 { 57, IFM_IEEE80211_MCS },
1653 { 58, IFM_IEEE80211_MCS },
1654 { 59, IFM_IEEE80211_MCS },
1655 { 60, IFM_IEEE80211_MCS },
1656 { 61, IFM_IEEE80211_MCS },
1657 { 62, IFM_IEEE80211_MCS },
1658 { 63, IFM_IEEE80211_MCS },
1659 { 64, IFM_IEEE80211_MCS },
1660 { 65, IFM_IEEE80211_MCS },
1661 { 66, IFM_IEEE80211_MCS },
1662 { 67, IFM_IEEE80211_MCS },
1663 { 68, IFM_IEEE80211_MCS },
1664 { 69, IFM_IEEE80211_MCS },
1665 { 70, IFM_IEEE80211_MCS },
1666 { 71, IFM_IEEE80211_MCS },
1667 { 72, IFM_IEEE80211_MCS },
1668 { 73, IFM_IEEE80211_MCS },
1669 { 74, IFM_IEEE80211_MCS },
1670 { 75, IFM_IEEE80211_MCS },
1671 { 76, IFM_IEEE80211_MCS },
1672 };
1673 int m;
1674
1675 /*
1676 * Check 11n rates first for match as an MCS.
1677 */
1678 if (mode == IEEE80211_MODE_11NA) {
1679 if (rate & IEEE80211_RATE_MCS) {
1680 rate &= ~IEEE80211_RATE_MCS;
1681 m = findmedia(htrates, nitems(htrates), rate);
1682 if (m != IFM_AUTO)
1683 return m | IFM_IEEE80211_11NA;
1684 }
1685 } else if (mode == IEEE80211_MODE_11NG) {
1686 /* NB: 12 is ambiguous, it will be treated as an MCS */
1687 if (rate & IEEE80211_RATE_MCS) {
1688 rate &= ~IEEE80211_RATE_MCS;
1689 m = findmedia(htrates, nitems(htrates), rate);
1690 if (m != IFM_AUTO)
1691 return m | IFM_IEEE80211_11NG;
1692 }
1693 }
1694 rate &= IEEE80211_RATE_VAL;
1695 switch (mode) {
1696 case IEEE80211_MODE_11A:
1697 case IEEE80211_MODE_HALF: /* XXX good 'nuf */
1698 case IEEE80211_MODE_QUARTER:
1699 case IEEE80211_MODE_11NA:
1700 case IEEE80211_MODE_TURBO_A:
1701 case IEEE80211_MODE_STURBO_A:
1702 return findmedia(rates, nitems(rates),
1703 rate | IFM_IEEE80211_11A);
1704 case IEEE80211_MODE_11B:
1705 return findmedia(rates, nitems(rates),
1706 rate | IFM_IEEE80211_11B);
1707 case IEEE80211_MODE_FH:
1708 return findmedia(rates, nitems(rates),
1709 rate | IFM_IEEE80211_FH);
1710 case IEEE80211_MODE_AUTO:
1711 /* NB: ic may be NULL for some drivers */
1712 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH)
1713 return findmedia(rates, nitems(rates),
1714 rate | IFM_IEEE80211_FH);
1715 /* NB: hack, 11g matches both 11b+11a rates */
1716 /* fall thru... */
1717 case IEEE80211_MODE_11G:
1718 case IEEE80211_MODE_11NG:
1719 case IEEE80211_MODE_TURBO_G:
1720 return findmedia(rates, nitems(rates), rate | IFM_IEEE80211_11G);
1721 }
1722 return IFM_AUTO;
1723}
1724
1725int
1726ieee80211_media2rate(int mword)
1727{
1728 static const int ieeerates[] = {
1729 -1, /* IFM_AUTO */
1730 0, /* IFM_MANUAL */
1731 0, /* IFM_NONE */
1732 2, /* IFM_IEEE80211_FH1 */
1733 4, /* IFM_IEEE80211_FH2 */
1734 2, /* IFM_IEEE80211_DS1 */
1735 4, /* IFM_IEEE80211_DS2 */
1736 11, /* IFM_IEEE80211_DS5 */
1737 22, /* IFM_IEEE80211_DS11 */
1738 44, /* IFM_IEEE80211_DS22 */
1739 12, /* IFM_IEEE80211_OFDM6 */
1740 18, /* IFM_IEEE80211_OFDM9 */
1741 24, /* IFM_IEEE80211_OFDM12 */
1742 36, /* IFM_IEEE80211_OFDM18 */
1743 48, /* IFM_IEEE80211_OFDM24 */
1744 72, /* IFM_IEEE80211_OFDM36 */
1745 96, /* IFM_IEEE80211_OFDM48 */
1746 108, /* IFM_IEEE80211_OFDM54 */
1747 144, /* IFM_IEEE80211_OFDM72 */
1748 0, /* IFM_IEEE80211_DS354k */
1749 0, /* IFM_IEEE80211_DS512k */
1750 6, /* IFM_IEEE80211_OFDM3 */
1751 9, /* IFM_IEEE80211_OFDM4 */
1752 54, /* IFM_IEEE80211_OFDM27 */
1753 -1, /* IFM_IEEE80211_MCS */
1754 };
1755 return IFM_SUBTYPE(mword) < nitems(ieeerates) ?
1756 ieeerates[IFM_SUBTYPE(mword)] : 0;
1757}
1758
1759/*
1760 * The following hash function is adapted from "Hash Functions" by Bob Jenkins
1761 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997).
1762 */
1763#define mix(a, b, c) \
1764do { \
1765 a -= b; a -= c; a ^= (c >> 13); \
1766 b -= c; b -= a; b ^= (a << 8); \
1767 c -= a; c -= b; c ^= (b >> 13); \
1768 a -= b; a -= c; a ^= (c >> 12); \
1769 b -= c; b -= a; b ^= (a << 16); \
1770 c -= a; c -= b; c ^= (b >> 5); \
1771 a -= b; a -= c; a ^= (c >> 3); \
1772 b -= c; b -= a; b ^= (a << 10); \
1773 c -= a; c -= b; c ^= (b >> 15); \
1774} while (/*CONSTCOND*/0)
1775
1776uint32_t
1777ieee80211_mac_hash(const struct ieee80211com *ic,
1778 const uint8_t addr[IEEE80211_ADDR_LEN])
1779{
1780 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key;
1781
1782 b += addr[5] << 8;
1783 b += addr[4];
1784 a += addr[3] << 24;
1785 a += addr[2] << 16;
1786 a += addr[1] << 8;
1787 a += addr[0];
1788
1789 mix(a, b, c);
1790
1791 return c;
1792}
1793#undef mix
1794
1795char
1796ieee80211_channel_type_char(const struct ieee80211_channel *c)
1797{
1798 if (IEEE80211_IS_CHAN_ST(c))
1799 return 'S';
1800 if (IEEE80211_IS_CHAN_108A(c))
1801 return 'T';
1802 if (IEEE80211_IS_CHAN_108G(c))
1803 return 'G';
1804 if (IEEE80211_IS_CHAN_HT(c))
1805 return 'n';
1806 if (IEEE80211_IS_CHAN_A(c))
1807 return 'a';
1808 if (IEEE80211_IS_CHAN_ANYG(c))
1809 return 'g';
1810 if (IEEE80211_IS_CHAN_B(c))
1811 return 'b';
1812 return 'f';
1813}
2 * Copyright (c) 2001 Atsushi Onoe
3 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: head/sys/net80211/ieee80211.c 286410 2015-08-07 11:43:14Z glebius $");
29
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/socket.h>
39#include <sys/sbuf.h>
40
41#include <machine/stdarg.h>
42
43#include <net/if.h>
44#include <net/if_var.h>
45#include <net/if_dl.h>
46#include <net/if_media.h>
47#include <net/if_types.h>
48#include <net/ethernet.h>
49
50#include <net80211/ieee80211_var.h>
51#include <net80211/ieee80211_regdomain.h>
52#ifdef IEEE80211_SUPPORT_SUPERG
53#include <net80211/ieee80211_superg.h>
54#endif
55#include <net80211/ieee80211_ratectl.h>
56
57#include <net/bpf.h>
58
59const char *ieee80211_phymode_name[IEEE80211_MODE_MAX] = {
60 [IEEE80211_MODE_AUTO] = "auto",
61 [IEEE80211_MODE_11A] = "11a",
62 [IEEE80211_MODE_11B] = "11b",
63 [IEEE80211_MODE_11G] = "11g",
64 [IEEE80211_MODE_FH] = "FH",
65 [IEEE80211_MODE_TURBO_A] = "turboA",
66 [IEEE80211_MODE_TURBO_G] = "turboG",
67 [IEEE80211_MODE_STURBO_A] = "sturboA",
68 [IEEE80211_MODE_HALF] = "half",
69 [IEEE80211_MODE_QUARTER] = "quarter",
70 [IEEE80211_MODE_11NA] = "11na",
71 [IEEE80211_MODE_11NG] = "11ng",
72};
73/* map ieee80211_opmode to the corresponding capability bit */
74const int ieee80211_opcap[IEEE80211_OPMODE_MAX] = {
75 [IEEE80211_M_IBSS] = IEEE80211_C_IBSS,
76 [IEEE80211_M_WDS] = IEEE80211_C_WDS,
77 [IEEE80211_M_STA] = IEEE80211_C_STA,
78 [IEEE80211_M_AHDEMO] = IEEE80211_C_AHDEMO,
79 [IEEE80211_M_HOSTAP] = IEEE80211_C_HOSTAP,
80 [IEEE80211_M_MONITOR] = IEEE80211_C_MONITOR,
81#ifdef IEEE80211_SUPPORT_MESH
82 [IEEE80211_M_MBSS] = IEEE80211_C_MBSS,
83#endif
84};
85
86const uint8_t ieee80211broadcastaddr[IEEE80211_ADDR_LEN] =
87 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
88
89static void ieee80211_syncflag_locked(struct ieee80211com *ic, int flag);
90static void ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag);
91static void ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag);
92static int ieee80211_media_setup(struct ieee80211com *ic,
93 struct ifmedia *media, int caps, int addsta,
94 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat);
95static int media_status(enum ieee80211_opmode,
96 const struct ieee80211_channel *);
97static uint64_t ieee80211_get_counter(struct ifnet *, ift_counter);
98
99MALLOC_DEFINE(M_80211_VAP, "80211vap", "802.11 vap state");
100
101/*
102 * Default supported rates for 802.11 operation (in IEEE .5Mb units).
103 */
104#define B(r) ((r) | IEEE80211_RATE_BASIC)
105static const struct ieee80211_rateset ieee80211_rateset_11a =
106 { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } };
107static const struct ieee80211_rateset ieee80211_rateset_half =
108 { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } };
109static const struct ieee80211_rateset ieee80211_rateset_quarter =
110 { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } };
111static const struct ieee80211_rateset ieee80211_rateset_11b =
112 { 4, { B(2), B(4), B(11), B(22) } };
113/* NB: OFDM rates are handled specially based on mode */
114static const struct ieee80211_rateset ieee80211_rateset_11g =
115 { 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } };
116#undef B
117
118/*
119 * Fill in 802.11 available channel set, mark
120 * all available channels as active, and pick
121 * a default channel if not already specified.
122 */
123void
124ieee80211_chan_init(struct ieee80211com *ic)
125{
126#define DEFAULTRATES(m, def) do { \
127 if (ic->ic_sup_rates[m].rs_nrates == 0) \
128 ic->ic_sup_rates[m] = def; \
129} while (0)
130 struct ieee80211_channel *c;
131 int i;
132
133 KASSERT(0 < ic->ic_nchans && ic->ic_nchans <= IEEE80211_CHAN_MAX,
134 ("invalid number of channels specified: %u", ic->ic_nchans));
135 memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail));
136 memset(ic->ic_modecaps, 0, sizeof(ic->ic_modecaps));
137 setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO);
138 for (i = 0; i < ic->ic_nchans; i++) {
139 c = &ic->ic_channels[i];
140 KASSERT(c->ic_flags != 0, ("channel with no flags"));
141 /*
142 * Help drivers that work only with frequencies by filling
143 * in IEEE channel #'s if not already calculated. Note this
144 * mimics similar work done in ieee80211_setregdomain when
145 * changing regulatory state.
146 */
147 if (c->ic_ieee == 0)
148 c->ic_ieee = ieee80211_mhz2ieee(c->ic_freq,c->ic_flags);
149 if (IEEE80211_IS_CHAN_HT40(c) && c->ic_extieee == 0)
150 c->ic_extieee = ieee80211_mhz2ieee(c->ic_freq +
151 (IEEE80211_IS_CHAN_HT40U(c) ? 20 : -20),
152 c->ic_flags);
153 /* default max tx power to max regulatory */
154 if (c->ic_maxpower == 0)
155 c->ic_maxpower = 2*c->ic_maxregpower;
156 setbit(ic->ic_chan_avail, c->ic_ieee);
157 /*
158 * Identify mode capabilities.
159 */
160 if (IEEE80211_IS_CHAN_A(c))
161 setbit(ic->ic_modecaps, IEEE80211_MODE_11A);
162 if (IEEE80211_IS_CHAN_B(c))
163 setbit(ic->ic_modecaps, IEEE80211_MODE_11B);
164 if (IEEE80211_IS_CHAN_ANYG(c))
165 setbit(ic->ic_modecaps, IEEE80211_MODE_11G);
166 if (IEEE80211_IS_CHAN_FHSS(c))
167 setbit(ic->ic_modecaps, IEEE80211_MODE_FH);
168 if (IEEE80211_IS_CHAN_108A(c))
169 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A);
170 if (IEEE80211_IS_CHAN_108G(c))
171 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G);
172 if (IEEE80211_IS_CHAN_ST(c))
173 setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A);
174 if (IEEE80211_IS_CHAN_HALF(c))
175 setbit(ic->ic_modecaps, IEEE80211_MODE_HALF);
176 if (IEEE80211_IS_CHAN_QUARTER(c))
177 setbit(ic->ic_modecaps, IEEE80211_MODE_QUARTER);
178 if (IEEE80211_IS_CHAN_HTA(c))
179 setbit(ic->ic_modecaps, IEEE80211_MODE_11NA);
180 if (IEEE80211_IS_CHAN_HTG(c))
181 setbit(ic->ic_modecaps, IEEE80211_MODE_11NG);
182 }
183 /* initialize candidate channels to all available */
184 memcpy(ic->ic_chan_active, ic->ic_chan_avail,
185 sizeof(ic->ic_chan_avail));
186
187 /* sort channel table to allow lookup optimizations */
188 ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans);
189
190 /* invalidate any previous state */
191 ic->ic_bsschan = IEEE80211_CHAN_ANYC;
192 ic->ic_prevchan = NULL;
193 ic->ic_csa_newchan = NULL;
194 /* arbitrarily pick the first channel */
195 ic->ic_curchan = &ic->ic_channels[0];
196 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
197
198 /* fillin well-known rate sets if driver has not specified */
199 DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b);
200 DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g);
201 DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a);
202 DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a);
203 DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g);
204 DEFAULTRATES(IEEE80211_MODE_STURBO_A, ieee80211_rateset_11a);
205 DEFAULTRATES(IEEE80211_MODE_HALF, ieee80211_rateset_half);
206 DEFAULTRATES(IEEE80211_MODE_QUARTER, ieee80211_rateset_quarter);
207 DEFAULTRATES(IEEE80211_MODE_11NA, ieee80211_rateset_11a);
208 DEFAULTRATES(IEEE80211_MODE_11NG, ieee80211_rateset_11g);
209
210 /*
211 * Setup required information to fill the mcsset field, if driver did
212 * not. Assume a 2T2R setup for historic reasons.
213 */
214 if (ic->ic_rxstream == 0)
215 ic->ic_rxstream = 2;
216 if (ic->ic_txstream == 0)
217 ic->ic_txstream = 2;
218
219 /*
220 * Set auto mode to reset active channel state and any desired channel.
221 */
222 (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO);
223#undef DEFAULTRATES
224}
225
226static void
227null_update_mcast(struct ieee80211com *ic)
228{
229
230 ic_printf(ic, "need multicast update callback\n");
231}
232
233static void
234null_update_promisc(struct ieee80211com *ic)
235{
236
237 ic_printf(ic, "need promiscuous mode update callback\n");
238}
239
240static void
241null_update_chw(struct ieee80211com *ic)
242{
243
244 ic_printf(ic, "%s: need callback\n", __func__);
245}
246
247int
248ic_printf(struct ieee80211com *ic, const char * fmt, ...)
249{
250 va_list ap;
251 int retval;
252
253 retval = printf("%s: ", ic->ic_name);
254 va_start(ap, fmt);
255 retval += vprintf(fmt, ap);
256 va_end(ap);
257 return (retval);
258}
259
260static LIST_HEAD(, ieee80211com) ic_head = LIST_HEAD_INITIALIZER(ic_head);
261static struct mtx ic_list_mtx;
262MTX_SYSINIT(ic_list, &ic_list_mtx, "ieee80211com list", MTX_DEF);
263
264static int
265sysctl_ieee80211coms(SYSCTL_HANDLER_ARGS)
266{
267 struct ieee80211com *ic;
268 struct sbuf *sb;
269 char *sp;
270 int error;
271
272 sb = sbuf_new_auto();
273 sp = "";
274 mtx_lock(&ic_list_mtx);
275 LIST_FOREACH(ic, &ic_head, ic_next) {
276 sbuf_printf(sb, "%s%s", sp, ic->ic_name);
277 sp = " ";
278 }
279 mtx_unlock(&ic_list_mtx);
280 sbuf_finish(sb);
281 error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb) + 1);
282 sbuf_delete(sb);
283 return (error);
284}
285
286SYSCTL_PROC(_net_wlan, OID_AUTO, devices,
287 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0,
288 sysctl_ieee80211coms, "A", "names of available 802.11 devices");
289
290/*
291 * Attach/setup the common net80211 state. Called by
292 * the driver on attach to prior to creating any vap's.
293 */
294void
295ieee80211_ifattach(struct ieee80211com *ic)
296{
297
298 IEEE80211_LOCK_INIT(ic, ic->ic_name);
299 IEEE80211_TX_LOCK_INIT(ic, ic->ic_name);
300 TAILQ_INIT(&ic->ic_vaps);
301
302 /* Create a taskqueue for all state changes */
303 ic->ic_tq = taskqueue_create("ic_taskq", M_WAITOK | M_ZERO,
304 taskqueue_thread_enqueue, &ic->ic_tq);
305 taskqueue_start_threads(&ic->ic_tq, 1, PI_NET, "%s net80211 taskq",
306 ic->ic_name);
307 ic->ic_ierrors = counter_u64_alloc(M_WAITOK);
308 ic->ic_oerrors = counter_u64_alloc(M_WAITOK);
309 /*
310 * Fill in 802.11 available channel set, mark all
311 * available channels as active, and pick a default
312 * channel if not already specified.
313 */
314 ieee80211_chan_init(ic);
315
316 ic->ic_update_mcast = null_update_mcast;
317 ic->ic_update_promisc = null_update_promisc;
318 ic->ic_update_chw = null_update_chw;
319
320 ic->ic_hash_key = arc4random();
321 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT;
322 ic->ic_lintval = ic->ic_bintval;
323 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX;
324
325 ieee80211_crypto_attach(ic);
326 ieee80211_node_attach(ic);
327 ieee80211_power_attach(ic);
328 ieee80211_proto_attach(ic);
329#ifdef IEEE80211_SUPPORT_SUPERG
330 ieee80211_superg_attach(ic);
331#endif
332 ieee80211_ht_attach(ic);
333 ieee80211_scan_attach(ic);
334 ieee80211_regdomain_attach(ic);
335 ieee80211_dfs_attach(ic);
336
337 ieee80211_sysctl_attach(ic);
338
339 mtx_lock(&ic_list_mtx);
340 LIST_INSERT_HEAD(&ic_head, ic, ic_next);
341 mtx_unlock(&ic_list_mtx);
342}
343
344/*
345 * Detach net80211 state on device detach. Tear down
346 * all vap's and reclaim all common state prior to the
347 * device state going away. Note we may call back into
348 * driver; it must be prepared for this.
349 */
350void
351ieee80211_ifdetach(struct ieee80211com *ic)
352{
353 struct ieee80211vap *vap;
354
355 mtx_lock(&ic_list_mtx);
356 LIST_REMOVE(ic, ic_next);
357 mtx_unlock(&ic_list_mtx);
358
359 /*
360 * The VAP is responsible for setting and clearing
361 * the VIMAGE context.
362 */
363 while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL)
364 ieee80211_vap_destroy(vap);
365 ieee80211_waitfor_parent(ic);
366
367 ieee80211_sysctl_detach(ic);
368 ieee80211_dfs_detach(ic);
369 ieee80211_regdomain_detach(ic);
370 ieee80211_scan_detach(ic);
371#ifdef IEEE80211_SUPPORT_SUPERG
372 ieee80211_superg_detach(ic);
373#endif
374 ieee80211_ht_detach(ic);
375 /* NB: must be called before ieee80211_node_detach */
376 ieee80211_proto_detach(ic);
377 ieee80211_crypto_detach(ic);
378 ieee80211_power_detach(ic);
379 ieee80211_node_detach(ic);
380
381 counter_u64_free(ic->ic_ierrors);
382 counter_u64_free(ic->ic_oerrors);
383
384 taskqueue_free(ic->ic_tq);
385 IEEE80211_TX_LOCK_DESTROY(ic);
386 IEEE80211_LOCK_DESTROY(ic);
387}
388
389struct ieee80211com *
390ieee80211_find_com(const char *name)
391{
392 struct ieee80211com *ic;
393
394 mtx_lock(&ic_list_mtx);
395 LIST_FOREACH(ic, &ic_head, ic_next)
396 if (strcmp(ic->ic_name, name) == 0)
397 break;
398 mtx_unlock(&ic_list_mtx);
399
400 return (ic);
401}
402
403/*
404 * Default reset method for use with the ioctl support. This
405 * method is invoked after any state change in the 802.11
406 * layer that should be propagated to the hardware but not
407 * require re-initialization of the 802.11 state machine (e.g
408 * rescanning for an ap). We always return ENETRESET which
409 * should cause the driver to re-initialize the device. Drivers
410 * can override this method to implement more optimized support.
411 */
412static int
413default_reset(struct ieee80211vap *vap, u_long cmd)
414{
415 return ENETRESET;
416}
417
418/*
419 * Add underlying device errors to vap errors.
420 */
421static uint64_t
422ieee80211_get_counter(struct ifnet *ifp, ift_counter cnt)
423{
424 struct ieee80211vap *vap = ifp->if_softc;
425 struct ieee80211com *ic = vap->iv_ic;
426 uint64_t rv;
427
428 rv = if_get_counter_default(ifp, cnt);
429 switch (cnt) {
430 case IFCOUNTER_OERRORS:
431 rv += counter_u64_fetch(ic->ic_oerrors);
432 break;
433 case IFCOUNTER_IERRORS:
434 rv += counter_u64_fetch(ic->ic_ierrors);
435 break;
436 default:
437 break;
438 }
439
440 return (rv);
441}
442
443/*
444 * Prepare a vap for use. Drivers use this call to
445 * setup net80211 state in new vap's prior attaching
446 * them with ieee80211_vap_attach (below).
447 */
448int
449ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap,
450 const char name[IFNAMSIZ], int unit, enum ieee80211_opmode opmode,
451 int flags, const uint8_t bssid[IEEE80211_ADDR_LEN])
452{
453 struct ifnet *ifp;
454
455 ifp = if_alloc(IFT_ETHER);
456 if (ifp == NULL) {
457 ic_printf(ic, "%s: unable to allocate ifnet\n",
458 __func__);
459 return ENOMEM;
460 }
461 if_initname(ifp, name, unit);
462 ifp->if_softc = vap; /* back pointer */
463 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
464 ifp->if_transmit = ieee80211_vap_transmit;
465 ifp->if_qflush = ieee80211_vap_qflush;
466 ifp->if_ioctl = ieee80211_ioctl;
467 ifp->if_init = ieee80211_init;
468 ifp->if_get_counter = ieee80211_get_counter;
469
470 vap->iv_ifp = ifp;
471 vap->iv_ic = ic;
472 vap->iv_flags = ic->ic_flags; /* propagate common flags */
473 vap->iv_flags_ext = ic->ic_flags_ext;
474 vap->iv_flags_ven = ic->ic_flags_ven;
475 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE;
476 vap->iv_htcaps = ic->ic_htcaps;
477 vap->iv_htextcaps = ic->ic_htextcaps;
478 vap->iv_opmode = opmode;
479 vap->iv_caps |= ieee80211_opcap[opmode];
480 vap->iv_myaddr = ic->ic_macaddr;
481 switch (opmode) {
482 case IEEE80211_M_WDS:
483 /*
484 * WDS links must specify the bssid of the far end.
485 * For legacy operation this is a static relationship.
486 * For non-legacy operation the station must associate
487 * and be authorized to pass traffic. Plumbing the
488 * vap to the proper node happens when the vap
489 * transitions to RUN state.
490 */
491 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid);
492 vap->iv_flags |= IEEE80211_F_DESBSSID;
493 if (flags & IEEE80211_CLONE_WDSLEGACY)
494 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY;
495 break;
496#ifdef IEEE80211_SUPPORT_TDMA
497 case IEEE80211_M_AHDEMO:
498 if (flags & IEEE80211_CLONE_TDMA) {
499 /* NB: checked before clone operation allowed */
500 KASSERT(ic->ic_caps & IEEE80211_C_TDMA,
501 ("not TDMA capable, ic_caps 0x%x", ic->ic_caps));
502 /*
503 * Propagate TDMA capability to mark vap; this
504 * cannot be removed and is used to distinguish
505 * regular ahdemo operation from ahdemo+tdma.
506 */
507 vap->iv_caps |= IEEE80211_C_TDMA;
508 }
509 break;
510#endif
511 default:
512 break;
513 }
514 /* auto-enable s/w beacon miss support */
515 if (flags & IEEE80211_CLONE_NOBEACONS)
516 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS;
517 /* auto-generated or user supplied MAC address */
518 if (flags & (IEEE80211_CLONE_BSSID|IEEE80211_CLONE_MACADDR))
519 vap->iv_flags_ext |= IEEE80211_FEXT_UNIQMAC;
520 /*
521 * Enable various functionality by default if we're
522 * capable; the driver can override us if it knows better.
523 */
524 if (vap->iv_caps & IEEE80211_C_WME)
525 vap->iv_flags |= IEEE80211_F_WME;
526 if (vap->iv_caps & IEEE80211_C_BURST)
527 vap->iv_flags |= IEEE80211_F_BURST;
528 /* NB: bg scanning only makes sense for station mode right now */
529 if (vap->iv_opmode == IEEE80211_M_STA &&
530 (vap->iv_caps & IEEE80211_C_BGSCAN))
531 vap->iv_flags |= IEEE80211_F_BGSCAN;
532 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */
533 /* NB: DFS support only makes sense for ap mode right now */
534 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
535 (vap->iv_caps & IEEE80211_C_DFS))
536 vap->iv_flags_ext |= IEEE80211_FEXT_DFS;
537
538 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */
539 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT;
540 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT;
541 /*
542 * Install a default reset method for the ioctl support;
543 * the driver can override this.
544 */
545 vap->iv_reset = default_reset;
546
547 ieee80211_sysctl_vattach(vap);
548 ieee80211_crypto_vattach(vap);
549 ieee80211_node_vattach(vap);
550 ieee80211_power_vattach(vap);
551 ieee80211_proto_vattach(vap);
552#ifdef IEEE80211_SUPPORT_SUPERG
553 ieee80211_superg_vattach(vap);
554#endif
555 ieee80211_ht_vattach(vap);
556 ieee80211_scan_vattach(vap);
557 ieee80211_regdomain_vattach(vap);
558 ieee80211_radiotap_vattach(vap);
559 ieee80211_ratectl_set(vap, IEEE80211_RATECTL_NONE);
560
561 return 0;
562}
563
564/*
565 * Activate a vap. State should have been prepared with a
566 * call to ieee80211_vap_setup and by the driver. On return
567 * from this call the vap is ready for use.
568 */
569int
570ieee80211_vap_attach(struct ieee80211vap *vap, ifm_change_cb_t media_change,
571 ifm_stat_cb_t media_stat, const uint8_t macaddr[IEEE80211_ADDR_LEN])
572{
573 struct ifnet *ifp = vap->iv_ifp;
574 struct ieee80211com *ic = vap->iv_ic;
575 struct ifmediareq imr;
576 int maxrate;
577
578 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
579 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n",
580 __func__, ieee80211_opmode_name[vap->iv_opmode],
581 ic->ic_name, vap->iv_flags, vap->iv_flags_ext);
582
583 /*
584 * Do late attach work that cannot happen until after
585 * the driver has had a chance to override defaults.
586 */
587 ieee80211_node_latevattach(vap);
588 ieee80211_power_latevattach(vap);
589
590 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps,
591 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat);
592 ieee80211_media_status(ifp, &imr);
593 /* NB: strip explicit mode; we're actually in autoselect */
594 ifmedia_set(&vap->iv_media,
595 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO));
596 if (maxrate)
597 ifp->if_baudrate = IF_Mbps(maxrate);
598
599 ether_ifattach(ifp, macaddr);
600 vap->iv_myaddr = IF_LLADDR(ifp);
601 /* hook output method setup by ether_ifattach */
602 vap->iv_output = ifp->if_output;
603 ifp->if_output = ieee80211_output;
604 /* NB: if_mtu set by ether_ifattach to ETHERMTU */
605
606 IEEE80211_LOCK(ic);
607 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next);
608 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
609#ifdef IEEE80211_SUPPORT_SUPERG
610 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
611#endif
612 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
613 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
614 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
615 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
616 IEEE80211_UNLOCK(ic);
617
618 return 1;
619}
620
621/*
622 * Tear down vap state and reclaim the ifnet.
623 * The driver is assumed to have prepared for
624 * this; e.g. by turning off interrupts for the
625 * underlying device.
626 */
627void
628ieee80211_vap_detach(struct ieee80211vap *vap)
629{
630 struct ieee80211com *ic = vap->iv_ic;
631 struct ifnet *ifp = vap->iv_ifp;
632
633 CURVNET_SET(ifp->if_vnet);
634
635 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n",
636 __func__, ieee80211_opmode_name[vap->iv_opmode], ic->ic_name);
637
638 /* NB: bpfdetach is called by ether_ifdetach and claims all taps */
639 ether_ifdetach(ifp);
640
641 ieee80211_stop(vap);
642
643 /*
644 * Flush any deferred vap tasks.
645 */
646 ieee80211_draintask(ic, &vap->iv_nstate_task);
647 ieee80211_draintask(ic, &vap->iv_swbmiss_task);
648
649 /* XXX band-aid until ifnet handles this for us */
650 taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
651
652 IEEE80211_LOCK(ic);
653 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running"));
654 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next);
655 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
656#ifdef IEEE80211_SUPPORT_SUPERG
657 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
658#endif
659 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
660 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
661 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
662 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
663 /* NB: this handles the bpfdetach done below */
664 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF);
665 if (vap->iv_ifflags & IFF_PROMISC)
666 ieee80211_promisc(vap, false);
667 if (vap->iv_ifflags & IFF_ALLMULTI)
668 ieee80211_allmulti(vap, false);
669 IEEE80211_UNLOCK(ic);
670
671 ifmedia_removeall(&vap->iv_media);
672
673 ieee80211_radiotap_vdetach(vap);
674 ieee80211_regdomain_vdetach(vap);
675 ieee80211_scan_vdetach(vap);
676#ifdef IEEE80211_SUPPORT_SUPERG
677 ieee80211_superg_vdetach(vap);
678#endif
679 ieee80211_ht_vdetach(vap);
680 /* NB: must be before ieee80211_node_vdetach */
681 ieee80211_proto_vdetach(vap);
682 ieee80211_crypto_vdetach(vap);
683 ieee80211_power_vdetach(vap);
684 ieee80211_node_vdetach(vap);
685 ieee80211_sysctl_vdetach(vap);
686
687 if_free(ifp);
688
689 CURVNET_RESTORE();
690}
691
692/*
693 * Count number of vaps in promisc, and issue promisc on
694 * parent respectively.
695 */
696void
697ieee80211_promisc(struct ieee80211vap *vap, bool on)
698{
699 struct ieee80211com *ic = vap->iv_ic;
700
701 /*
702 * XXX the bridge sets PROMISC but we don't want to
703 * enable it on the device, discard here so all the
704 * drivers don't need to special-case it
705 */
706 if (!(vap->iv_opmode == IEEE80211_M_MONITOR ||
707 (vap->iv_opmode == IEEE80211_M_AHDEMO &&
708 (vap->iv_caps & IEEE80211_C_TDMA) == 0)))
709 return;
710
711 IEEE80211_LOCK(ic);
712 if (on) {
713 if (++ic->ic_promisc == 1)
714 ieee80211_runtask(ic, &ic->ic_promisc_task);
715 } else {
716 KASSERT(ic->ic_promisc > 0, ("%s: ic %p not promisc",
717 __func__, ic));
718 if (--ic->ic_promisc == 0)
719 ieee80211_runtask(ic, &ic->ic_promisc_task);
720 }
721 IEEE80211_UNLOCK(ic);
722}
723
724/*
725 * Count number of vaps in allmulti, and issue allmulti on
726 * parent respectively.
727 */
728void
729ieee80211_allmulti(struct ieee80211vap *vap, bool on)
730{
731 struct ieee80211com *ic = vap->iv_ic;
732
733 IEEE80211_LOCK(ic);
734 if (on) {
735 if (++ic->ic_allmulti == 1)
736 ieee80211_runtask(ic, &ic->ic_mcast_task);
737 } else {
738 KASSERT(ic->ic_allmulti > 0, ("%s: ic %p not allmulti",
739 __func__, ic));
740 if (--ic->ic_allmulti == 0)
741 ieee80211_runtask(ic, &ic->ic_mcast_task);
742 }
743 IEEE80211_UNLOCK(ic);
744}
745
746/*
747 * Synchronize flag bit state in the com structure
748 * according to the state of all vap's. This is used,
749 * for example, to handle state changes via ioctls.
750 */
751static void
752ieee80211_syncflag_locked(struct ieee80211com *ic, int flag)
753{
754 struct ieee80211vap *vap;
755 int bit;
756
757 IEEE80211_LOCK_ASSERT(ic);
758
759 bit = 0;
760 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
761 if (vap->iv_flags & flag) {
762 bit = 1;
763 break;
764 }
765 if (bit)
766 ic->ic_flags |= flag;
767 else
768 ic->ic_flags &= ~flag;
769}
770
771void
772ieee80211_syncflag(struct ieee80211vap *vap, int flag)
773{
774 struct ieee80211com *ic = vap->iv_ic;
775
776 IEEE80211_LOCK(ic);
777 if (flag < 0) {
778 flag = -flag;
779 vap->iv_flags &= ~flag;
780 } else
781 vap->iv_flags |= flag;
782 ieee80211_syncflag_locked(ic, flag);
783 IEEE80211_UNLOCK(ic);
784}
785
786/*
787 * Synchronize flags_ht bit state in the com structure
788 * according to the state of all vap's. This is used,
789 * for example, to handle state changes via ioctls.
790 */
791static void
792ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag)
793{
794 struct ieee80211vap *vap;
795 int bit;
796
797 IEEE80211_LOCK_ASSERT(ic);
798
799 bit = 0;
800 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
801 if (vap->iv_flags_ht & flag) {
802 bit = 1;
803 break;
804 }
805 if (bit)
806 ic->ic_flags_ht |= flag;
807 else
808 ic->ic_flags_ht &= ~flag;
809}
810
811void
812ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag)
813{
814 struct ieee80211com *ic = vap->iv_ic;
815
816 IEEE80211_LOCK(ic);
817 if (flag < 0) {
818 flag = -flag;
819 vap->iv_flags_ht &= ~flag;
820 } else
821 vap->iv_flags_ht |= flag;
822 ieee80211_syncflag_ht_locked(ic, flag);
823 IEEE80211_UNLOCK(ic);
824}
825
826/*
827 * Synchronize flags_ext bit state in the com structure
828 * according to the state of all vap's. This is used,
829 * for example, to handle state changes via ioctls.
830 */
831static void
832ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag)
833{
834 struct ieee80211vap *vap;
835 int bit;
836
837 IEEE80211_LOCK_ASSERT(ic);
838
839 bit = 0;
840 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
841 if (vap->iv_flags_ext & flag) {
842 bit = 1;
843 break;
844 }
845 if (bit)
846 ic->ic_flags_ext |= flag;
847 else
848 ic->ic_flags_ext &= ~flag;
849}
850
851void
852ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag)
853{
854 struct ieee80211com *ic = vap->iv_ic;
855
856 IEEE80211_LOCK(ic);
857 if (flag < 0) {
858 flag = -flag;
859 vap->iv_flags_ext &= ~flag;
860 } else
861 vap->iv_flags_ext |= flag;
862 ieee80211_syncflag_ext_locked(ic, flag);
863 IEEE80211_UNLOCK(ic);
864}
865
866static __inline int
867mapgsm(u_int freq, u_int flags)
868{
869 freq *= 10;
870 if (flags & IEEE80211_CHAN_QUARTER)
871 freq += 5;
872 else if (flags & IEEE80211_CHAN_HALF)
873 freq += 10;
874 else
875 freq += 20;
876 /* NB: there is no 907/20 wide but leave room */
877 return (freq - 906*10) / 5;
878}
879
880static __inline int
881mappsb(u_int freq, u_int flags)
882{
883 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5;
884}
885
886/*
887 * Convert MHz frequency to IEEE channel number.
888 */
889int
890ieee80211_mhz2ieee(u_int freq, u_int flags)
891{
892#define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990)
893 if (flags & IEEE80211_CHAN_GSM)
894 return mapgsm(freq, flags);
895 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
896 if (freq == 2484)
897 return 14;
898 if (freq < 2484)
899 return ((int) freq - 2407) / 5;
900 else
901 return 15 + ((freq - 2512) / 20);
902 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */
903 if (freq <= 5000) {
904 /* XXX check regdomain? */
905 if (IS_FREQ_IN_PSB(freq))
906 return mappsb(freq, flags);
907 return (freq - 4000) / 5;
908 } else
909 return (freq - 5000) / 5;
910 } else { /* either, guess */
911 if (freq == 2484)
912 return 14;
913 if (freq < 2484) {
914 if (907 <= freq && freq <= 922)
915 return mapgsm(freq, flags);
916 return ((int) freq - 2407) / 5;
917 }
918 if (freq < 5000) {
919 if (IS_FREQ_IN_PSB(freq))
920 return mappsb(freq, flags);
921 else if (freq > 4900)
922 return (freq - 4000) / 5;
923 else
924 return 15 + ((freq - 2512) / 20);
925 }
926 return (freq - 5000) / 5;
927 }
928#undef IS_FREQ_IN_PSB
929}
930
931/*
932 * Convert channel to IEEE channel number.
933 */
934int
935ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c)
936{
937 if (c == NULL) {
938 ic_printf(ic, "invalid channel (NULL)\n");
939 return 0; /* XXX */
940 }
941 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee);
942}
943
944/*
945 * Convert IEEE channel number to MHz frequency.
946 */
947u_int
948ieee80211_ieee2mhz(u_int chan, u_int flags)
949{
950 if (flags & IEEE80211_CHAN_GSM)
951 return 907 + 5 * (chan / 10);
952 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
953 if (chan == 14)
954 return 2484;
955 if (chan < 14)
956 return 2407 + chan*5;
957 else
958 return 2512 + ((chan-15)*20);
959 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */
960 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) {
961 chan -= 37;
962 return 4940 + chan*5 + (chan % 5 ? 2 : 0);
963 }
964 return 5000 + (chan*5);
965 } else { /* either, guess */
966 /* XXX can't distinguish PSB+GSM channels */
967 if (chan == 14)
968 return 2484;
969 if (chan < 14) /* 0-13 */
970 return 2407 + chan*5;
971 if (chan < 27) /* 15-26 */
972 return 2512 + ((chan-15)*20);
973 return 5000 + (chan*5);
974 }
975}
976
977/*
978 * Locate a channel given a frequency+flags. We cache
979 * the previous lookup to optimize switching between two
980 * channels--as happens with dynamic turbo.
981 */
982struct ieee80211_channel *
983ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags)
984{
985 struct ieee80211_channel *c;
986 int i;
987
988 flags &= IEEE80211_CHAN_ALLTURBO;
989 c = ic->ic_prevchan;
990 if (c != NULL && c->ic_freq == freq &&
991 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
992 return c;
993 /* brute force search */
994 for (i = 0; i < ic->ic_nchans; i++) {
995 c = &ic->ic_channels[i];
996 if (c->ic_freq == freq &&
997 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
998 return c;
999 }
1000 return NULL;
1001}
1002
1003/*
1004 * Locate a channel given a channel number+flags. We cache
1005 * the previous lookup to optimize switching between two
1006 * channels--as happens with dynamic turbo.
1007 */
1008struct ieee80211_channel *
1009ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags)
1010{
1011 struct ieee80211_channel *c;
1012 int i;
1013
1014 flags &= IEEE80211_CHAN_ALLTURBO;
1015 c = ic->ic_prevchan;
1016 if (c != NULL && c->ic_ieee == ieee &&
1017 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
1018 return c;
1019 /* brute force search */
1020 for (i = 0; i < ic->ic_nchans; i++) {
1021 c = &ic->ic_channels[i];
1022 if (c->ic_ieee == ieee &&
1023 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
1024 return c;
1025 }
1026 return NULL;
1027}
1028
1029/*
1030 * Lookup a channel suitable for the given rx status.
1031 *
1032 * This is used to find a channel for a frame (eg beacon, probe
1033 * response) based purely on the received PHY information.
1034 *
1035 * For now it tries to do it based on R_FREQ / R_IEEE.
1036 * This is enough for 11bg and 11a (and thus 11ng/11na)
1037 * but it will not be enough for GSM, PSB channels and the
1038 * like. It also doesn't know about legacy-turbog and
1039 * legacy-turbo modes, which some offload NICs actually
1040 * support in weird ways.
1041 *
1042 * Takes the ic and rxstatus; returns the channel or NULL
1043 * if not found.
1044 *
1045 * XXX TODO: Add support for that when the need arises.
1046 */
1047struct ieee80211_channel *
1048ieee80211_lookup_channel_rxstatus(struct ieee80211vap *vap,
1049 const struct ieee80211_rx_stats *rxs)
1050{
1051 struct ieee80211com *ic = vap->iv_ic;
1052 uint32_t flags;
1053 struct ieee80211_channel *c;
1054
1055 if (rxs == NULL)
1056 return (NULL);
1057
1058 /*
1059 * Strictly speaking we only use freq for now,
1060 * however later on we may wish to just store
1061 * the ieee for verification.
1062 */
1063 if ((rxs->r_flags & IEEE80211_R_FREQ) == 0)
1064 return (NULL);
1065 if ((rxs->r_flags & IEEE80211_R_IEEE) == 0)
1066 return (NULL);
1067
1068 /*
1069 * If the rx status contains a valid ieee/freq, then
1070 * ensure we populate the correct channel information
1071 * in rxchan before passing it up to the scan infrastructure.
1072 * Offload NICs will pass up beacons from all channels
1073 * during background scans.
1074 */
1075
1076 /* Determine a band */
1077 /* XXX should be done by the driver? */
1078 if (rxs->c_freq < 3000) {
1079 flags = IEEE80211_CHAN_G;
1080 } else {
1081 flags = IEEE80211_CHAN_A;
1082 }
1083
1084 /* Channel lookup */
1085 c = ieee80211_find_channel(ic, rxs->c_freq, flags);
1086
1087 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INPUT,
1088 "%s: freq=%d, ieee=%d, flags=0x%08x; c=%p\n",
1089 __func__,
1090 (int) rxs->c_freq,
1091 (int) rxs->c_ieee,
1092 flags,
1093 c);
1094
1095 return (c);
1096}
1097
1098static void
1099addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword)
1100{
1101#define ADD(_ic, _s, _o) \
1102 ifmedia_add(media, \
1103 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL)
1104 static const u_int mopts[IEEE80211_MODE_MAX] = {
1105 [IEEE80211_MODE_AUTO] = IFM_AUTO,
1106 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A,
1107 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B,
1108 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G,
1109 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH,
1110 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
1111 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO,
1112 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
1113 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */
1114 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */
1115 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA,
1116 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG,
1117 };
1118 u_int mopt;
1119
1120 mopt = mopts[mode];
1121 if (addsta)
1122 ADD(ic, mword, mopt); /* STA mode has no cap */
1123 if (caps & IEEE80211_C_IBSS)
1124 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC);
1125 if (caps & IEEE80211_C_HOSTAP)
1126 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP);
1127 if (caps & IEEE80211_C_AHDEMO)
1128 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0);
1129 if (caps & IEEE80211_C_MONITOR)
1130 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR);
1131 if (caps & IEEE80211_C_WDS)
1132 ADD(media, mword, mopt | IFM_IEEE80211_WDS);
1133 if (caps & IEEE80211_C_MBSS)
1134 ADD(media, mword, mopt | IFM_IEEE80211_MBSS);
1135#undef ADD
1136}
1137
1138/*
1139 * Setup the media data structures according to the channel and
1140 * rate tables.
1141 */
1142static int
1143ieee80211_media_setup(struct ieee80211com *ic,
1144 struct ifmedia *media, int caps, int addsta,
1145 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
1146{
1147 int i, j, rate, maxrate, mword, r;
1148 enum ieee80211_phymode mode;
1149 const struct ieee80211_rateset *rs;
1150 struct ieee80211_rateset allrates;
1151
1152 /*
1153 * Fill in media characteristics.
1154 */
1155 ifmedia_init(media, 0, media_change, media_stat);
1156 maxrate = 0;
1157 /*
1158 * Add media for legacy operating modes.
1159 */
1160 memset(&allrates, 0, sizeof(allrates));
1161 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) {
1162 if (isclr(ic->ic_modecaps, mode))
1163 continue;
1164 addmedia(media, caps, addsta, mode, IFM_AUTO);
1165 if (mode == IEEE80211_MODE_AUTO)
1166 continue;
1167 rs = &ic->ic_sup_rates[mode];
1168 for (i = 0; i < rs->rs_nrates; i++) {
1169 rate = rs->rs_rates[i];
1170 mword = ieee80211_rate2media(ic, rate, mode);
1171 if (mword == 0)
1172 continue;
1173 addmedia(media, caps, addsta, mode, mword);
1174 /*
1175 * Add legacy rate to the collection of all rates.
1176 */
1177 r = rate & IEEE80211_RATE_VAL;
1178 for (j = 0; j < allrates.rs_nrates; j++)
1179 if (allrates.rs_rates[j] == r)
1180 break;
1181 if (j == allrates.rs_nrates) {
1182 /* unique, add to the set */
1183 allrates.rs_rates[j] = r;
1184 allrates.rs_nrates++;
1185 }
1186 rate = (rate & IEEE80211_RATE_VAL) / 2;
1187 if (rate > maxrate)
1188 maxrate = rate;
1189 }
1190 }
1191 for (i = 0; i < allrates.rs_nrates; i++) {
1192 mword = ieee80211_rate2media(ic, allrates.rs_rates[i],
1193 IEEE80211_MODE_AUTO);
1194 if (mword == 0)
1195 continue;
1196 /* NB: remove media options from mword */
1197 addmedia(media, caps, addsta,
1198 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword));
1199 }
1200 /*
1201 * Add HT/11n media. Note that we do not have enough
1202 * bits in the media subtype to express the MCS so we
1203 * use a "placeholder" media subtype and any fixed MCS
1204 * must be specified with a different mechanism.
1205 */
1206 for (; mode <= IEEE80211_MODE_11NG; mode++) {
1207 if (isclr(ic->ic_modecaps, mode))
1208 continue;
1209 addmedia(media, caps, addsta, mode, IFM_AUTO);
1210 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS);
1211 }
1212 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) ||
1213 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) {
1214 addmedia(media, caps, addsta,
1215 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS);
1216 i = ic->ic_txstream * 8 - 1;
1217 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) &&
1218 (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40))
1219 rate = ieee80211_htrates[i].ht40_rate_400ns;
1220 else if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40))
1221 rate = ieee80211_htrates[i].ht40_rate_800ns;
1222 else if ((ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20))
1223 rate = ieee80211_htrates[i].ht20_rate_400ns;
1224 else
1225 rate = ieee80211_htrates[i].ht20_rate_800ns;
1226 if (rate > maxrate)
1227 maxrate = rate;
1228 }
1229 return maxrate;
1230}
1231
1232/* XXX inline or eliminate? */
1233const struct ieee80211_rateset *
1234ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c)
1235{
1236 /* XXX does this work for 11ng basic rates? */
1237 return &ic->ic_sup_rates[ieee80211_chan2mode(c)];
1238}
1239
1240void
1241ieee80211_announce(struct ieee80211com *ic)
1242{
1243 int i, rate, mword;
1244 enum ieee80211_phymode mode;
1245 const struct ieee80211_rateset *rs;
1246
1247 /* NB: skip AUTO since it has no rates */
1248 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) {
1249 if (isclr(ic->ic_modecaps, mode))
1250 continue;
1251 ic_printf(ic, "%s rates: ", ieee80211_phymode_name[mode]);
1252 rs = &ic->ic_sup_rates[mode];
1253 for (i = 0; i < rs->rs_nrates; i++) {
1254 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode);
1255 if (mword == 0)
1256 continue;
1257 rate = ieee80211_media2rate(mword);
1258 printf("%s%d%sMbps", (i != 0 ? " " : ""),
1259 rate / 2, ((rate & 0x1) != 0 ? ".5" : ""));
1260 }
1261 printf("\n");
1262 }
1263 ieee80211_ht_announce(ic);
1264}
1265
1266void
1267ieee80211_announce_channels(struct ieee80211com *ic)
1268{
1269 const struct ieee80211_channel *c;
1270 char type;
1271 int i, cw;
1272
1273 printf("Chan Freq CW RegPwr MinPwr MaxPwr\n");
1274 for (i = 0; i < ic->ic_nchans; i++) {
1275 c = &ic->ic_channels[i];
1276 if (IEEE80211_IS_CHAN_ST(c))
1277 type = 'S';
1278 else if (IEEE80211_IS_CHAN_108A(c))
1279 type = 'T';
1280 else if (IEEE80211_IS_CHAN_108G(c))
1281 type = 'G';
1282 else if (IEEE80211_IS_CHAN_HT(c))
1283 type = 'n';
1284 else if (IEEE80211_IS_CHAN_A(c))
1285 type = 'a';
1286 else if (IEEE80211_IS_CHAN_ANYG(c))
1287 type = 'g';
1288 else if (IEEE80211_IS_CHAN_B(c))
1289 type = 'b';
1290 else
1291 type = 'f';
1292 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c))
1293 cw = 40;
1294 else if (IEEE80211_IS_CHAN_HALF(c))
1295 cw = 10;
1296 else if (IEEE80211_IS_CHAN_QUARTER(c))
1297 cw = 5;
1298 else
1299 cw = 20;
1300 printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n"
1301 , c->ic_ieee, c->ic_freq, type
1302 , cw
1303 , IEEE80211_IS_CHAN_HT40U(c) ? '+' :
1304 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' '
1305 , c->ic_maxregpower
1306 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0
1307 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0
1308 );
1309 }
1310}
1311
1312static int
1313media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode)
1314{
1315 switch (IFM_MODE(ime->ifm_media)) {
1316 case IFM_IEEE80211_11A:
1317 *mode = IEEE80211_MODE_11A;
1318 break;
1319 case IFM_IEEE80211_11B:
1320 *mode = IEEE80211_MODE_11B;
1321 break;
1322 case IFM_IEEE80211_11G:
1323 *mode = IEEE80211_MODE_11G;
1324 break;
1325 case IFM_IEEE80211_FH:
1326 *mode = IEEE80211_MODE_FH;
1327 break;
1328 case IFM_IEEE80211_11NA:
1329 *mode = IEEE80211_MODE_11NA;
1330 break;
1331 case IFM_IEEE80211_11NG:
1332 *mode = IEEE80211_MODE_11NG;
1333 break;
1334 case IFM_AUTO:
1335 *mode = IEEE80211_MODE_AUTO;
1336 break;
1337 default:
1338 return 0;
1339 }
1340 /*
1341 * Turbo mode is an ``option''.
1342 * XXX does not apply to AUTO
1343 */
1344 if (ime->ifm_media & IFM_IEEE80211_TURBO) {
1345 if (*mode == IEEE80211_MODE_11A) {
1346 if (flags & IEEE80211_F_TURBOP)
1347 *mode = IEEE80211_MODE_TURBO_A;
1348 else
1349 *mode = IEEE80211_MODE_STURBO_A;
1350 } else if (*mode == IEEE80211_MODE_11G)
1351 *mode = IEEE80211_MODE_TURBO_G;
1352 else
1353 return 0;
1354 }
1355 /* XXX HT40 +/- */
1356 return 1;
1357}
1358
1359/*
1360 * Handle a media change request on the vap interface.
1361 */
1362int
1363ieee80211_media_change(struct ifnet *ifp)
1364{
1365 struct ieee80211vap *vap = ifp->if_softc;
1366 struct ifmedia_entry *ime = vap->iv_media.ifm_cur;
1367 uint16_t newmode;
1368
1369 if (!media2mode(ime, vap->iv_flags, &newmode))
1370 return EINVAL;
1371 if (vap->iv_des_mode != newmode) {
1372 vap->iv_des_mode = newmode;
1373 /* XXX kick state machine if up+running */
1374 }
1375 return 0;
1376}
1377
1378/*
1379 * Common code to calculate the media status word
1380 * from the operating mode and channel state.
1381 */
1382static int
1383media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan)
1384{
1385 int status;
1386
1387 status = IFM_IEEE80211;
1388 switch (opmode) {
1389 case IEEE80211_M_STA:
1390 break;
1391 case IEEE80211_M_IBSS:
1392 status |= IFM_IEEE80211_ADHOC;
1393 break;
1394 case IEEE80211_M_HOSTAP:
1395 status |= IFM_IEEE80211_HOSTAP;
1396 break;
1397 case IEEE80211_M_MONITOR:
1398 status |= IFM_IEEE80211_MONITOR;
1399 break;
1400 case IEEE80211_M_AHDEMO:
1401 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0;
1402 break;
1403 case IEEE80211_M_WDS:
1404 status |= IFM_IEEE80211_WDS;
1405 break;
1406 case IEEE80211_M_MBSS:
1407 status |= IFM_IEEE80211_MBSS;
1408 break;
1409 }
1410 if (IEEE80211_IS_CHAN_HTA(chan)) {
1411 status |= IFM_IEEE80211_11NA;
1412 } else if (IEEE80211_IS_CHAN_HTG(chan)) {
1413 status |= IFM_IEEE80211_11NG;
1414 } else if (IEEE80211_IS_CHAN_A(chan)) {
1415 status |= IFM_IEEE80211_11A;
1416 } else if (IEEE80211_IS_CHAN_B(chan)) {
1417 status |= IFM_IEEE80211_11B;
1418 } else if (IEEE80211_IS_CHAN_ANYG(chan)) {
1419 status |= IFM_IEEE80211_11G;
1420 } else if (IEEE80211_IS_CHAN_FHSS(chan)) {
1421 status |= IFM_IEEE80211_FH;
1422 }
1423 /* XXX else complain? */
1424
1425 if (IEEE80211_IS_CHAN_TURBO(chan))
1426 status |= IFM_IEEE80211_TURBO;
1427#if 0
1428 if (IEEE80211_IS_CHAN_HT20(chan))
1429 status |= IFM_IEEE80211_HT20;
1430 if (IEEE80211_IS_CHAN_HT40(chan))
1431 status |= IFM_IEEE80211_HT40;
1432#endif
1433 return status;
1434}
1435
1436void
1437ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr)
1438{
1439 struct ieee80211vap *vap = ifp->if_softc;
1440 struct ieee80211com *ic = vap->iv_ic;
1441 enum ieee80211_phymode mode;
1442
1443 imr->ifm_status = IFM_AVALID;
1444 /*
1445 * NB: use the current channel's mode to lock down a xmit
1446 * rate only when running; otherwise we may have a mismatch
1447 * in which case the rate will not be convertible.
1448 */
1449 if (vap->iv_state == IEEE80211_S_RUN ||
1450 vap->iv_state == IEEE80211_S_SLEEP) {
1451 imr->ifm_status |= IFM_ACTIVE;
1452 mode = ieee80211_chan2mode(ic->ic_curchan);
1453 } else
1454 mode = IEEE80211_MODE_AUTO;
1455 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan);
1456 /*
1457 * Calculate a current rate if possible.
1458 */
1459 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) {
1460 /*
1461 * A fixed rate is set, report that.
1462 */
1463 imr->ifm_active |= ieee80211_rate2media(ic,
1464 vap->iv_txparms[mode].ucastrate, mode);
1465 } else if (vap->iv_opmode == IEEE80211_M_STA) {
1466 /*
1467 * In station mode report the current transmit rate.
1468 */
1469 imr->ifm_active |= ieee80211_rate2media(ic,
1470 vap->iv_bss->ni_txrate, mode);
1471 } else
1472 imr->ifm_active |= IFM_AUTO;
1473 if (imr->ifm_status & IFM_ACTIVE)
1474 imr->ifm_current = imr->ifm_active;
1475}
1476
1477/*
1478 * Set the current phy mode and recalculate the active channel
1479 * set based on the available channels for this mode. Also
1480 * select a new default/current channel if the current one is
1481 * inappropriate for this mode.
1482 */
1483int
1484ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode)
1485{
1486 /*
1487 * Adjust basic rates in 11b/11g supported rate set.
1488 * Note that if operating on a hal/quarter rate channel
1489 * this is a noop as those rates sets are different
1490 * and used instead.
1491 */
1492 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B)
1493 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode);
1494
1495 ic->ic_curmode = mode;
1496 ieee80211_reset_erp(ic); /* reset ERP state */
1497
1498 return 0;
1499}
1500
1501/*
1502 * Return the phy mode for with the specified channel.
1503 */
1504enum ieee80211_phymode
1505ieee80211_chan2mode(const struct ieee80211_channel *chan)
1506{
1507
1508 if (IEEE80211_IS_CHAN_HTA(chan))
1509 return IEEE80211_MODE_11NA;
1510 else if (IEEE80211_IS_CHAN_HTG(chan))
1511 return IEEE80211_MODE_11NG;
1512 else if (IEEE80211_IS_CHAN_108G(chan))
1513 return IEEE80211_MODE_TURBO_G;
1514 else if (IEEE80211_IS_CHAN_ST(chan))
1515 return IEEE80211_MODE_STURBO_A;
1516 else if (IEEE80211_IS_CHAN_TURBO(chan))
1517 return IEEE80211_MODE_TURBO_A;
1518 else if (IEEE80211_IS_CHAN_HALF(chan))
1519 return IEEE80211_MODE_HALF;
1520 else if (IEEE80211_IS_CHAN_QUARTER(chan))
1521 return IEEE80211_MODE_QUARTER;
1522 else if (IEEE80211_IS_CHAN_A(chan))
1523 return IEEE80211_MODE_11A;
1524 else if (IEEE80211_IS_CHAN_ANYG(chan))
1525 return IEEE80211_MODE_11G;
1526 else if (IEEE80211_IS_CHAN_B(chan))
1527 return IEEE80211_MODE_11B;
1528 else if (IEEE80211_IS_CHAN_FHSS(chan))
1529 return IEEE80211_MODE_FH;
1530
1531 /* NB: should not get here */
1532 printf("%s: cannot map channel to mode; freq %u flags 0x%x\n",
1533 __func__, chan->ic_freq, chan->ic_flags);
1534 return IEEE80211_MODE_11B;
1535}
1536
1537struct ratemedia {
1538 u_int match; /* rate + mode */
1539 u_int media; /* if_media rate */
1540};
1541
1542static int
1543findmedia(const struct ratemedia rates[], int n, u_int match)
1544{
1545 int i;
1546
1547 for (i = 0; i < n; i++)
1548 if (rates[i].match == match)
1549 return rates[i].media;
1550 return IFM_AUTO;
1551}
1552
1553/*
1554 * Convert IEEE80211 rate value to ifmedia subtype.
1555 * Rate is either a legacy rate in units of 0.5Mbps
1556 * or an MCS index.
1557 */
1558int
1559ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode)
1560{
1561 static const struct ratemedia rates[] = {
1562 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 },
1563 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 },
1564 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 },
1565 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 },
1566 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 },
1567 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 },
1568 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 },
1569 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 },
1570 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 },
1571 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 },
1572 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 },
1573 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 },
1574 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 },
1575 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 },
1576 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 },
1577 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 },
1578 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 },
1579 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 },
1580 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 },
1581 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 },
1582 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 },
1583 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 },
1584 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 },
1585 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 },
1586 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 },
1587 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 },
1588 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 },
1589 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 },
1590 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 },
1591 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 },
1592 /* NB: OFDM72 doesn't realy exist so we don't handle it */
1593 };
1594 static const struct ratemedia htrates[] = {
1595 { 0, IFM_IEEE80211_MCS },
1596 { 1, IFM_IEEE80211_MCS },
1597 { 2, IFM_IEEE80211_MCS },
1598 { 3, IFM_IEEE80211_MCS },
1599 { 4, IFM_IEEE80211_MCS },
1600 { 5, IFM_IEEE80211_MCS },
1601 { 6, IFM_IEEE80211_MCS },
1602 { 7, IFM_IEEE80211_MCS },
1603 { 8, IFM_IEEE80211_MCS },
1604 { 9, IFM_IEEE80211_MCS },
1605 { 10, IFM_IEEE80211_MCS },
1606 { 11, IFM_IEEE80211_MCS },
1607 { 12, IFM_IEEE80211_MCS },
1608 { 13, IFM_IEEE80211_MCS },
1609 { 14, IFM_IEEE80211_MCS },
1610 { 15, IFM_IEEE80211_MCS },
1611 { 16, IFM_IEEE80211_MCS },
1612 { 17, IFM_IEEE80211_MCS },
1613 { 18, IFM_IEEE80211_MCS },
1614 { 19, IFM_IEEE80211_MCS },
1615 { 20, IFM_IEEE80211_MCS },
1616 { 21, IFM_IEEE80211_MCS },
1617 { 22, IFM_IEEE80211_MCS },
1618 { 23, IFM_IEEE80211_MCS },
1619 { 24, IFM_IEEE80211_MCS },
1620 { 25, IFM_IEEE80211_MCS },
1621 { 26, IFM_IEEE80211_MCS },
1622 { 27, IFM_IEEE80211_MCS },
1623 { 28, IFM_IEEE80211_MCS },
1624 { 29, IFM_IEEE80211_MCS },
1625 { 30, IFM_IEEE80211_MCS },
1626 { 31, IFM_IEEE80211_MCS },
1627 { 32, IFM_IEEE80211_MCS },
1628 { 33, IFM_IEEE80211_MCS },
1629 { 34, IFM_IEEE80211_MCS },
1630 { 35, IFM_IEEE80211_MCS },
1631 { 36, IFM_IEEE80211_MCS },
1632 { 37, IFM_IEEE80211_MCS },
1633 { 38, IFM_IEEE80211_MCS },
1634 { 39, IFM_IEEE80211_MCS },
1635 { 40, IFM_IEEE80211_MCS },
1636 { 41, IFM_IEEE80211_MCS },
1637 { 42, IFM_IEEE80211_MCS },
1638 { 43, IFM_IEEE80211_MCS },
1639 { 44, IFM_IEEE80211_MCS },
1640 { 45, IFM_IEEE80211_MCS },
1641 { 46, IFM_IEEE80211_MCS },
1642 { 47, IFM_IEEE80211_MCS },
1643 { 48, IFM_IEEE80211_MCS },
1644 { 49, IFM_IEEE80211_MCS },
1645 { 50, IFM_IEEE80211_MCS },
1646 { 51, IFM_IEEE80211_MCS },
1647 { 52, IFM_IEEE80211_MCS },
1648 { 53, IFM_IEEE80211_MCS },
1649 { 54, IFM_IEEE80211_MCS },
1650 { 55, IFM_IEEE80211_MCS },
1651 { 56, IFM_IEEE80211_MCS },
1652 { 57, IFM_IEEE80211_MCS },
1653 { 58, IFM_IEEE80211_MCS },
1654 { 59, IFM_IEEE80211_MCS },
1655 { 60, IFM_IEEE80211_MCS },
1656 { 61, IFM_IEEE80211_MCS },
1657 { 62, IFM_IEEE80211_MCS },
1658 { 63, IFM_IEEE80211_MCS },
1659 { 64, IFM_IEEE80211_MCS },
1660 { 65, IFM_IEEE80211_MCS },
1661 { 66, IFM_IEEE80211_MCS },
1662 { 67, IFM_IEEE80211_MCS },
1663 { 68, IFM_IEEE80211_MCS },
1664 { 69, IFM_IEEE80211_MCS },
1665 { 70, IFM_IEEE80211_MCS },
1666 { 71, IFM_IEEE80211_MCS },
1667 { 72, IFM_IEEE80211_MCS },
1668 { 73, IFM_IEEE80211_MCS },
1669 { 74, IFM_IEEE80211_MCS },
1670 { 75, IFM_IEEE80211_MCS },
1671 { 76, IFM_IEEE80211_MCS },
1672 };
1673 int m;
1674
1675 /*
1676 * Check 11n rates first for match as an MCS.
1677 */
1678 if (mode == IEEE80211_MODE_11NA) {
1679 if (rate & IEEE80211_RATE_MCS) {
1680 rate &= ~IEEE80211_RATE_MCS;
1681 m = findmedia(htrates, nitems(htrates), rate);
1682 if (m != IFM_AUTO)
1683 return m | IFM_IEEE80211_11NA;
1684 }
1685 } else if (mode == IEEE80211_MODE_11NG) {
1686 /* NB: 12 is ambiguous, it will be treated as an MCS */
1687 if (rate & IEEE80211_RATE_MCS) {
1688 rate &= ~IEEE80211_RATE_MCS;
1689 m = findmedia(htrates, nitems(htrates), rate);
1690 if (m != IFM_AUTO)
1691 return m | IFM_IEEE80211_11NG;
1692 }
1693 }
1694 rate &= IEEE80211_RATE_VAL;
1695 switch (mode) {
1696 case IEEE80211_MODE_11A:
1697 case IEEE80211_MODE_HALF: /* XXX good 'nuf */
1698 case IEEE80211_MODE_QUARTER:
1699 case IEEE80211_MODE_11NA:
1700 case IEEE80211_MODE_TURBO_A:
1701 case IEEE80211_MODE_STURBO_A:
1702 return findmedia(rates, nitems(rates),
1703 rate | IFM_IEEE80211_11A);
1704 case IEEE80211_MODE_11B:
1705 return findmedia(rates, nitems(rates),
1706 rate | IFM_IEEE80211_11B);
1707 case IEEE80211_MODE_FH:
1708 return findmedia(rates, nitems(rates),
1709 rate | IFM_IEEE80211_FH);
1710 case IEEE80211_MODE_AUTO:
1711 /* NB: ic may be NULL for some drivers */
1712 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH)
1713 return findmedia(rates, nitems(rates),
1714 rate | IFM_IEEE80211_FH);
1715 /* NB: hack, 11g matches both 11b+11a rates */
1716 /* fall thru... */
1717 case IEEE80211_MODE_11G:
1718 case IEEE80211_MODE_11NG:
1719 case IEEE80211_MODE_TURBO_G:
1720 return findmedia(rates, nitems(rates), rate | IFM_IEEE80211_11G);
1721 }
1722 return IFM_AUTO;
1723}
1724
1725int
1726ieee80211_media2rate(int mword)
1727{
1728 static const int ieeerates[] = {
1729 -1, /* IFM_AUTO */
1730 0, /* IFM_MANUAL */
1731 0, /* IFM_NONE */
1732 2, /* IFM_IEEE80211_FH1 */
1733 4, /* IFM_IEEE80211_FH2 */
1734 2, /* IFM_IEEE80211_DS1 */
1735 4, /* IFM_IEEE80211_DS2 */
1736 11, /* IFM_IEEE80211_DS5 */
1737 22, /* IFM_IEEE80211_DS11 */
1738 44, /* IFM_IEEE80211_DS22 */
1739 12, /* IFM_IEEE80211_OFDM6 */
1740 18, /* IFM_IEEE80211_OFDM9 */
1741 24, /* IFM_IEEE80211_OFDM12 */
1742 36, /* IFM_IEEE80211_OFDM18 */
1743 48, /* IFM_IEEE80211_OFDM24 */
1744 72, /* IFM_IEEE80211_OFDM36 */
1745 96, /* IFM_IEEE80211_OFDM48 */
1746 108, /* IFM_IEEE80211_OFDM54 */
1747 144, /* IFM_IEEE80211_OFDM72 */
1748 0, /* IFM_IEEE80211_DS354k */
1749 0, /* IFM_IEEE80211_DS512k */
1750 6, /* IFM_IEEE80211_OFDM3 */
1751 9, /* IFM_IEEE80211_OFDM4 */
1752 54, /* IFM_IEEE80211_OFDM27 */
1753 -1, /* IFM_IEEE80211_MCS */
1754 };
1755 return IFM_SUBTYPE(mword) < nitems(ieeerates) ?
1756 ieeerates[IFM_SUBTYPE(mword)] : 0;
1757}
1758
1759/*
1760 * The following hash function is adapted from "Hash Functions" by Bob Jenkins
1761 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997).
1762 */
1763#define mix(a, b, c) \
1764do { \
1765 a -= b; a -= c; a ^= (c >> 13); \
1766 b -= c; b -= a; b ^= (a << 8); \
1767 c -= a; c -= b; c ^= (b >> 13); \
1768 a -= b; a -= c; a ^= (c >> 12); \
1769 b -= c; b -= a; b ^= (a << 16); \
1770 c -= a; c -= b; c ^= (b >> 5); \
1771 a -= b; a -= c; a ^= (c >> 3); \
1772 b -= c; b -= a; b ^= (a << 10); \
1773 c -= a; c -= b; c ^= (b >> 15); \
1774} while (/*CONSTCOND*/0)
1775
1776uint32_t
1777ieee80211_mac_hash(const struct ieee80211com *ic,
1778 const uint8_t addr[IEEE80211_ADDR_LEN])
1779{
1780 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key;
1781
1782 b += addr[5] << 8;
1783 b += addr[4];
1784 a += addr[3] << 24;
1785 a += addr[2] << 16;
1786 a += addr[1] << 8;
1787 a += addr[0];
1788
1789 mix(a, b, c);
1790
1791 return c;
1792}
1793#undef mix
1794
1795char
1796ieee80211_channel_type_char(const struct ieee80211_channel *c)
1797{
1798 if (IEEE80211_IS_CHAN_ST(c))
1799 return 'S';
1800 if (IEEE80211_IS_CHAN_108A(c))
1801 return 'T';
1802 if (IEEE80211_IS_CHAN_108G(c))
1803 return 'G';
1804 if (IEEE80211_IS_CHAN_HT(c))
1805 return 'n';
1806 if (IEEE80211_IS_CHAN_A(c))
1807 return 'a';
1808 if (IEEE80211_IS_CHAN_ANYG(c))
1809 return 'g';
1810 if (IEEE80211_IS_CHAN_B(c))
1811 return 'b';
1812 return 'f';
1813}