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("$FreeBSD$");
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/malloc.h>
39 #include <sys/socket.h>
40 #include <sys/sbuf.h>
41
42 #include <machine/stdarg.h>
43
44 #include <net/if.h>
45 #include <net/if_var.h>
46 #include <net/if_dl.h>
47 #include <net/if_media.h>
48 #include <net/if_types.h>
49 #include <net/ethernet.h>
50
51 #include <net80211/ieee80211_var.h>
52 #include <net80211/ieee80211_regdomain.h>
53 #ifdef IEEE80211_SUPPORT_SUPERG
54 #include <net80211/ieee80211_superg.h>
55 #endif
56 #include <net80211/ieee80211_ratectl.h>
57
58 #include <net/bpf.h>
59
60 const char *ieee80211_phymode_name[IEEE80211_MODE_MAX] = {
61 [IEEE80211_MODE_AUTO] = "auto",
62 [IEEE80211_MODE_11A] = "11a",
63 [IEEE80211_MODE_11B] = "11b",
64 [IEEE80211_MODE_11G] = "11g",
65 [IEEE80211_MODE_FH] = "FH",
66 [IEEE80211_MODE_TURBO_A] = "turboA",
67 [IEEE80211_MODE_TURBO_G] = "turboG",
68 [IEEE80211_MODE_STURBO_A] = "sturboA",
69 [IEEE80211_MODE_HALF] = "half",
70 [IEEE80211_MODE_QUARTER] = "quarter",
71 [IEEE80211_MODE_11NA] = "11na",
72 [IEEE80211_MODE_11NG] = "11ng",
73 };
74 /* map ieee80211_opmode to the corresponding capability bit */
75 const int ieee80211_opcap[IEEE80211_OPMODE_MAX] = {
76 [IEEE80211_M_IBSS] = IEEE80211_C_IBSS,
77 [IEEE80211_M_WDS] = IEEE80211_C_WDS,
78 [IEEE80211_M_STA] = IEEE80211_C_STA,
79 [IEEE80211_M_AHDEMO] = IEEE80211_C_AHDEMO,
80 [IEEE80211_M_HOSTAP] = IEEE80211_C_HOSTAP,
81 [IEEE80211_M_MONITOR] = IEEE80211_C_MONITOR,
82 #ifdef IEEE80211_SUPPORT_MESH
83 [IEEE80211_M_MBSS] = IEEE80211_C_MBSS,
84 #endif
85 };
86
87 const uint8_t ieee80211broadcastaddr[IEEE80211_ADDR_LEN] =
88 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
89
90 static void ieee80211_syncflag_locked(struct ieee80211com *ic, int flag);
91 static void ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag);
92 static void ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag);
93 static int ieee80211_media_setup(struct ieee80211com *ic,
94 struct ifmedia *media, int caps, int addsta,
95 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat);
96 static int media_status(enum ieee80211_opmode,
97 const struct ieee80211_channel *);
98 static uint64_t ieee80211_get_counter(struct ifnet *, ift_counter);
99
100 MALLOC_DEFINE(M_80211_VAP, "80211vap", "802.11 vap state");
101
102 /*
103 * Default supported rates for 802.11 operation (in IEEE .5Mb units).
104 */
105 #define B(r) ((r) | IEEE80211_RATE_BASIC)
106 static const struct ieee80211_rateset ieee80211_rateset_11a =
107 { 8, { B(12), 18, B(24), 36, B(48), 72, 96, 108 } };
108 static const struct ieee80211_rateset ieee80211_rateset_half =
109 { 8, { B(6), 9, B(12), 18, B(24), 36, 48, 54 } };
110 static const struct ieee80211_rateset ieee80211_rateset_quarter =
111 { 8, { B(3), 4, B(6), 9, B(12), 18, 24, 27 } };
112 static const struct ieee80211_rateset ieee80211_rateset_11b =
113 { 4, { B(2), B(4), B(11), B(22) } };
114 /* NB: OFDM rates are handled specially based on mode */
115 static const struct ieee80211_rateset ieee80211_rateset_11g =
116 { 12, { B(2), B(4), B(11), B(22), 12, 18, 24, 36, 48, 72, 96, 108 } };
117 #undef B
118
119 /*
120 * Fill in 802.11 available channel set, mark
121 * all available channels as active, and pick
122 * a default channel if not already specified.
123 */
124 void
ieee80211_chan_init(struct ieee80211com * ic)125 ieee80211_chan_init(struct ieee80211com *ic)
126 {
127 #define DEFAULTRATES(m, def) do { \
128 if (ic->ic_sup_rates[m].rs_nrates == 0) \
129 ic->ic_sup_rates[m] = def; \
130 } while (0)
131 struct ieee80211_channel *c;
132 int i;
133
134 KASSERT(0 < ic->ic_nchans && ic->ic_nchans <= IEEE80211_CHAN_MAX,
135 ("invalid number of channels specified: %u", ic->ic_nchans));
136 memset(ic->ic_chan_avail, 0, sizeof(ic->ic_chan_avail));
137 memset(ic->ic_modecaps, 0, sizeof(ic->ic_modecaps));
138 setbit(ic->ic_modecaps, IEEE80211_MODE_AUTO);
139 for (i = 0; i < ic->ic_nchans; i++) {
140 c = &ic->ic_channels[i];
141 KASSERT(c->ic_flags != 0, ("channel with no flags"));
142 /*
143 * Help drivers that work only with frequencies by filling
144 * in IEEE channel #'s if not already calculated. Note this
145 * mimics similar work done in ieee80211_setregdomain when
146 * changing regulatory state.
147 */
148 if (c->ic_ieee == 0)
149 c->ic_ieee = ieee80211_mhz2ieee(c->ic_freq,c->ic_flags);
150 if (IEEE80211_IS_CHAN_HT40(c) && c->ic_extieee == 0)
151 c->ic_extieee = ieee80211_mhz2ieee(c->ic_freq +
152 (IEEE80211_IS_CHAN_HT40U(c) ? 20 : -20),
153 c->ic_flags);
154 /* default max tx power to max regulatory */
155 if (c->ic_maxpower == 0)
156 c->ic_maxpower = 2*c->ic_maxregpower;
157 setbit(ic->ic_chan_avail, c->ic_ieee);
158 /*
159 * Identify mode capabilities.
160 */
161 if (IEEE80211_IS_CHAN_A(c))
162 setbit(ic->ic_modecaps, IEEE80211_MODE_11A);
163 if (IEEE80211_IS_CHAN_B(c))
164 setbit(ic->ic_modecaps, IEEE80211_MODE_11B);
165 if (IEEE80211_IS_CHAN_ANYG(c))
166 setbit(ic->ic_modecaps, IEEE80211_MODE_11G);
167 if (IEEE80211_IS_CHAN_FHSS(c))
168 setbit(ic->ic_modecaps, IEEE80211_MODE_FH);
169 if (IEEE80211_IS_CHAN_108A(c))
170 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_A);
171 if (IEEE80211_IS_CHAN_108G(c))
172 setbit(ic->ic_modecaps, IEEE80211_MODE_TURBO_G);
173 if (IEEE80211_IS_CHAN_ST(c))
174 setbit(ic->ic_modecaps, IEEE80211_MODE_STURBO_A);
175 if (IEEE80211_IS_CHAN_HALF(c))
176 setbit(ic->ic_modecaps, IEEE80211_MODE_HALF);
177 if (IEEE80211_IS_CHAN_QUARTER(c))
178 setbit(ic->ic_modecaps, IEEE80211_MODE_QUARTER);
179 if (IEEE80211_IS_CHAN_HTA(c))
180 setbit(ic->ic_modecaps, IEEE80211_MODE_11NA);
181 if (IEEE80211_IS_CHAN_HTG(c))
182 setbit(ic->ic_modecaps, IEEE80211_MODE_11NG);
183 }
184 /* initialize candidate channels to all available */
185 memcpy(ic->ic_chan_active, ic->ic_chan_avail,
186 sizeof(ic->ic_chan_avail));
187
188 /* sort channel table to allow lookup optimizations */
189 ieee80211_sort_channels(ic->ic_channels, ic->ic_nchans);
190
191 /* invalidate any previous state */
192 ic->ic_bsschan = IEEE80211_CHAN_ANYC;
193 ic->ic_prevchan = NULL;
194 ic->ic_csa_newchan = NULL;
195 /* arbitrarily pick the first channel */
196 ic->ic_curchan = &ic->ic_channels[0];
197 ic->ic_rt = ieee80211_get_ratetable(ic->ic_curchan);
198
199 /* fillin well-known rate sets if driver has not specified */
200 DEFAULTRATES(IEEE80211_MODE_11B, ieee80211_rateset_11b);
201 DEFAULTRATES(IEEE80211_MODE_11G, ieee80211_rateset_11g);
202 DEFAULTRATES(IEEE80211_MODE_11A, ieee80211_rateset_11a);
203 DEFAULTRATES(IEEE80211_MODE_TURBO_A, ieee80211_rateset_11a);
204 DEFAULTRATES(IEEE80211_MODE_TURBO_G, ieee80211_rateset_11g);
205 DEFAULTRATES(IEEE80211_MODE_STURBO_A, ieee80211_rateset_11a);
206 DEFAULTRATES(IEEE80211_MODE_HALF, ieee80211_rateset_half);
207 DEFAULTRATES(IEEE80211_MODE_QUARTER, ieee80211_rateset_quarter);
208 DEFAULTRATES(IEEE80211_MODE_11NA, ieee80211_rateset_11a);
209 DEFAULTRATES(IEEE80211_MODE_11NG, ieee80211_rateset_11g);
210
211 /*
212 * Setup required information to fill the mcsset field, if driver did
213 * not. Assume a 2T2R setup for historic reasons.
214 */
215 if (ic->ic_rxstream == 0)
216 ic->ic_rxstream = 2;
217 if (ic->ic_txstream == 0)
218 ic->ic_txstream = 2;
219
220 /*
221 * Set auto mode to reset active channel state and any desired channel.
222 */
223 (void) ieee80211_setmode(ic, IEEE80211_MODE_AUTO);
224 #undef DEFAULTRATES
225 }
226
227 static void
null_update_mcast(struct ieee80211com * ic)228 null_update_mcast(struct ieee80211com *ic)
229 {
230
231 ic_printf(ic, "need multicast update callback\n");
232 }
233
234 static void
null_update_promisc(struct ieee80211com * ic)235 null_update_promisc(struct ieee80211com *ic)
236 {
237
238 ic_printf(ic, "need promiscuous mode update callback\n");
239 }
240
241 static void
null_update_chw(struct ieee80211com * ic)242 null_update_chw(struct ieee80211com *ic)
243 {
244
245 ic_printf(ic, "%s: need callback\n", __func__);
246 }
247
248 int
ic_printf(struct ieee80211com * ic,const char * fmt,...)249 ic_printf(struct ieee80211com *ic, const char * fmt, ...)
250 {
251 va_list ap;
252 int retval;
253
254 retval = printf("%s: ", ic->ic_name);
255 va_start(ap, fmt);
256 retval += vprintf(fmt, ap);
257 va_end(ap);
258 return (retval);
259 }
260
261 static LIST_HEAD(, ieee80211com) ic_head = LIST_HEAD_INITIALIZER(ic_head);
262 static struct mtx ic_list_mtx;
263 MTX_SYSINIT(ic_list, &ic_list_mtx, "ieee80211com list", MTX_DEF);
264
265 static int
sysctl_ieee80211coms(SYSCTL_HANDLER_ARGS)266 sysctl_ieee80211coms(SYSCTL_HANDLER_ARGS)
267 {
268 struct ieee80211com *ic;
269 struct sbuf sb;
270 char *sp;
271 int error;
272
273 error = sysctl_wire_old_buffer(req, 0);
274 if (error)
275 return (error);
276 sbuf_new_for_sysctl(&sb, NULL, 8, req);
277 sbuf_clear_flags(&sb, SBUF_INCLUDENUL);
278 sp = "";
279 mtx_lock(&ic_list_mtx);
280 LIST_FOREACH(ic, &ic_head, ic_next) {
281 sbuf_printf(&sb, "%s%s", sp, ic->ic_name);
282 sp = " ";
283 }
284 mtx_unlock(&ic_list_mtx);
285 error = sbuf_finish(&sb);
286 sbuf_delete(&sb);
287 return (error);
288 }
289
290 SYSCTL_PROC(_net_wlan, OID_AUTO, devices,
291 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0,
292 sysctl_ieee80211coms, "A", "names of available 802.11 devices");
293
294 /*
295 * Attach/setup the common net80211 state. Called by
296 * the driver on attach to prior to creating any vap's.
297 */
298 void
ieee80211_ifattach(struct ieee80211com * ic)299 ieee80211_ifattach(struct ieee80211com *ic)
300 {
301
302 IEEE80211_LOCK_INIT(ic, ic->ic_name);
303 IEEE80211_TX_LOCK_INIT(ic, ic->ic_name);
304 TAILQ_INIT(&ic->ic_vaps);
305
306 /* Create a taskqueue for all state changes */
307 ic->ic_tq = taskqueue_create("ic_taskq", M_WAITOK | M_ZERO,
308 taskqueue_thread_enqueue, &ic->ic_tq);
309 taskqueue_start_threads(&ic->ic_tq, 1, PI_NET, "%s net80211 taskq",
310 ic->ic_name);
311 ic->ic_ierrors = counter_u64_alloc(M_WAITOK);
312 ic->ic_oerrors = counter_u64_alloc(M_WAITOK);
313 /*
314 * Fill in 802.11 available channel set, mark all
315 * available channels as active, and pick a default
316 * channel if not already specified.
317 */
318 ieee80211_chan_init(ic);
319
320 ic->ic_update_mcast = null_update_mcast;
321 ic->ic_update_promisc = null_update_promisc;
322 ic->ic_update_chw = null_update_chw;
323
324 ic->ic_hash_key = arc4random();
325 ic->ic_bintval = IEEE80211_BINTVAL_DEFAULT;
326 ic->ic_lintval = ic->ic_bintval;
327 ic->ic_txpowlimit = IEEE80211_TXPOWER_MAX;
328
329 ieee80211_crypto_attach(ic);
330 ieee80211_node_attach(ic);
331 ieee80211_power_attach(ic);
332 ieee80211_proto_attach(ic);
333 #ifdef IEEE80211_SUPPORT_SUPERG
334 ieee80211_superg_attach(ic);
335 #endif
336 ieee80211_ht_attach(ic);
337 ieee80211_scan_attach(ic);
338 ieee80211_regdomain_attach(ic);
339 ieee80211_dfs_attach(ic);
340
341 ieee80211_sysctl_attach(ic);
342
343 mtx_lock(&ic_list_mtx);
344 LIST_INSERT_HEAD(&ic_head, ic, ic_next);
345 mtx_unlock(&ic_list_mtx);
346 }
347
348 /*
349 * Detach net80211 state on device detach. Tear down
350 * all vap's and reclaim all common state prior to the
351 * device state going away. Note we may call back into
352 * driver; it must be prepared for this.
353 */
354 void
ieee80211_ifdetach(struct ieee80211com * ic)355 ieee80211_ifdetach(struct ieee80211com *ic)
356 {
357 struct ieee80211vap *vap;
358
359 /*
360 * We use this as an indicator that ifattach never had a chance to be
361 * called, e.g. early driver attach failed and ifdetach was called
362 * during subsequent detach. Never fear, for we have nothing to do
363 * here.
364 */
365 if (ic->ic_tq == NULL)
366 return;
367
368 mtx_lock(&ic_list_mtx);
369 LIST_REMOVE(ic, ic_next);
370 mtx_unlock(&ic_list_mtx);
371
372 taskqueue_drain(taskqueue_thread, &ic->ic_restart_task);
373
374 /*
375 * The VAP is responsible for setting and clearing
376 * the VIMAGE context.
377 */
378 while ((vap = TAILQ_FIRST(&ic->ic_vaps)) != NULL) {
379 ieee80211_com_vdetach(vap);
380 ieee80211_vap_destroy(vap);
381 }
382 ieee80211_waitfor_parent(ic);
383
384 ieee80211_sysctl_detach(ic);
385 ieee80211_dfs_detach(ic);
386 ieee80211_regdomain_detach(ic);
387 ieee80211_scan_detach(ic);
388 #ifdef IEEE80211_SUPPORT_SUPERG
389 ieee80211_superg_detach(ic);
390 #endif
391 ieee80211_ht_detach(ic);
392 /* NB: must be called before ieee80211_node_detach */
393 ieee80211_proto_detach(ic);
394 ieee80211_crypto_detach(ic);
395 ieee80211_power_detach(ic);
396 ieee80211_node_detach(ic);
397
398 counter_u64_free(ic->ic_ierrors);
399 counter_u64_free(ic->ic_oerrors);
400
401 taskqueue_free(ic->ic_tq);
402 IEEE80211_TX_LOCK_DESTROY(ic);
403 IEEE80211_LOCK_DESTROY(ic);
404 }
405
406 struct ieee80211com *
ieee80211_find_com(const char * name)407 ieee80211_find_com(const char *name)
408 {
409 struct ieee80211com *ic;
410
411 mtx_lock(&ic_list_mtx);
412 LIST_FOREACH(ic, &ic_head, ic_next)
413 if (strcmp(ic->ic_name, name) == 0)
414 break;
415 mtx_unlock(&ic_list_mtx);
416
417 return (ic);
418 }
419
420 void
ieee80211_iterate_coms(ieee80211_com_iter_func * f,void * arg)421 ieee80211_iterate_coms(ieee80211_com_iter_func *f, void *arg)
422 {
423 struct ieee80211com *ic;
424
425 mtx_lock(&ic_list_mtx);
426 LIST_FOREACH(ic, &ic_head, ic_next)
427 (*f)(arg, ic);
428 mtx_unlock(&ic_list_mtx);
429 }
430
431 /*
432 * Default reset method for use with the ioctl support. This
433 * method is invoked after any state change in the 802.11
434 * layer that should be propagated to the hardware but not
435 * require re-initialization of the 802.11 state machine (e.g
436 * rescanning for an ap). We always return ENETRESET which
437 * should cause the driver to re-initialize the device. Drivers
438 * can override this method to implement more optimized support.
439 */
440 static int
default_reset(struct ieee80211vap * vap,u_long cmd)441 default_reset(struct ieee80211vap *vap, u_long cmd)
442 {
443 return ENETRESET;
444 }
445
446 /*
447 * Add underlying device errors to vap errors.
448 */
449 static uint64_t
ieee80211_get_counter(struct ifnet * ifp,ift_counter cnt)450 ieee80211_get_counter(struct ifnet *ifp, ift_counter cnt)
451 {
452 struct ieee80211vap *vap = ifp->if_softc;
453 struct ieee80211com *ic = vap->iv_ic;
454 uint64_t rv;
455
456 rv = if_get_counter_default(ifp, cnt);
457 switch (cnt) {
458 case IFCOUNTER_OERRORS:
459 rv += counter_u64_fetch(ic->ic_oerrors);
460 break;
461 case IFCOUNTER_IERRORS:
462 rv += counter_u64_fetch(ic->ic_ierrors);
463 break;
464 default:
465 break;
466 }
467
468 return (rv);
469 }
470
471 /*
472 * Prepare a vap for use. Drivers use this call to
473 * setup net80211 state in new vap's prior attaching
474 * them with ieee80211_vap_attach (below).
475 */
476 int
ieee80211_vap_setup(struct ieee80211com * ic,struct ieee80211vap * vap,const char name[IFNAMSIZ],int unit,enum ieee80211_opmode opmode,int flags,const uint8_t bssid[IEEE80211_ADDR_LEN])477 ieee80211_vap_setup(struct ieee80211com *ic, struct ieee80211vap *vap,
478 const char name[IFNAMSIZ], int unit, enum ieee80211_opmode opmode,
479 int flags, const uint8_t bssid[IEEE80211_ADDR_LEN])
480 {
481 struct ifnet *ifp;
482
483 ifp = if_alloc(IFT_ETHER);
484 if (ifp == NULL) {
485 ic_printf(ic, "%s: unable to allocate ifnet\n",
486 __func__);
487 return ENOMEM;
488 }
489 if_initname(ifp, name, unit);
490 ifp->if_softc = vap; /* back pointer */
491 ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
492 ifp->if_transmit = ieee80211_vap_transmit;
493 ifp->if_qflush = ieee80211_vap_qflush;
494 ifp->if_ioctl = ieee80211_ioctl;
495 ifp->if_init = ieee80211_init;
496 ifp->if_get_counter = ieee80211_get_counter;
497
498 vap->iv_ifp = ifp;
499 vap->iv_ic = ic;
500 vap->iv_flags = ic->ic_flags; /* propagate common flags */
501 vap->iv_flags_ext = ic->ic_flags_ext;
502 vap->iv_flags_ven = ic->ic_flags_ven;
503 vap->iv_caps = ic->ic_caps &~ IEEE80211_C_OPMODE;
504 vap->iv_htcaps = ic->ic_htcaps;
505 vap->iv_htextcaps = ic->ic_htextcaps;
506 vap->iv_opmode = opmode;
507 vap->iv_caps |= ieee80211_opcap[opmode];
508 IEEE80211_ADDR_COPY(vap->iv_myaddr, ic->ic_macaddr);
509 switch (opmode) {
510 case IEEE80211_M_WDS:
511 /*
512 * WDS links must specify the bssid of the far end.
513 * For legacy operation this is a static relationship.
514 * For non-legacy operation the station must associate
515 * and be authorized to pass traffic. Plumbing the
516 * vap to the proper node happens when the vap
517 * transitions to RUN state.
518 */
519 IEEE80211_ADDR_COPY(vap->iv_des_bssid, bssid);
520 vap->iv_flags |= IEEE80211_F_DESBSSID;
521 if (flags & IEEE80211_CLONE_WDSLEGACY)
522 vap->iv_flags_ext |= IEEE80211_FEXT_WDSLEGACY;
523 break;
524 #ifdef IEEE80211_SUPPORT_TDMA
525 case IEEE80211_M_AHDEMO:
526 if (flags & IEEE80211_CLONE_TDMA) {
527 /* NB: checked before clone operation allowed */
528 KASSERT(ic->ic_caps & IEEE80211_C_TDMA,
529 ("not TDMA capable, ic_caps 0x%x", ic->ic_caps));
530 /*
531 * Propagate TDMA capability to mark vap; this
532 * cannot be removed and is used to distinguish
533 * regular ahdemo operation from ahdemo+tdma.
534 */
535 vap->iv_caps |= IEEE80211_C_TDMA;
536 }
537 break;
538 #endif
539 default:
540 break;
541 }
542 /* auto-enable s/w beacon miss support */
543 if (flags & IEEE80211_CLONE_NOBEACONS)
544 vap->iv_flags_ext |= IEEE80211_FEXT_SWBMISS;
545 /* auto-generated or user supplied MAC address */
546 if (flags & (IEEE80211_CLONE_BSSID|IEEE80211_CLONE_MACADDR))
547 vap->iv_flags_ext |= IEEE80211_FEXT_UNIQMAC;
548 /*
549 * Enable various functionality by default if we're
550 * capable; the driver can override us if it knows better.
551 */
552 if (vap->iv_caps & IEEE80211_C_WME)
553 vap->iv_flags |= IEEE80211_F_WME;
554 if (vap->iv_caps & IEEE80211_C_BURST)
555 vap->iv_flags |= IEEE80211_F_BURST;
556 /* NB: bg scanning only makes sense for station mode right now */
557 if (vap->iv_opmode == IEEE80211_M_STA &&
558 (vap->iv_caps & IEEE80211_C_BGSCAN))
559 vap->iv_flags |= IEEE80211_F_BGSCAN;
560 vap->iv_flags |= IEEE80211_F_DOTH; /* XXX no cap, just ena */
561 /* NB: DFS support only makes sense for ap mode right now */
562 if (vap->iv_opmode == IEEE80211_M_HOSTAP &&
563 (vap->iv_caps & IEEE80211_C_DFS))
564 vap->iv_flags_ext |= IEEE80211_FEXT_DFS;
565
566 vap->iv_des_chan = IEEE80211_CHAN_ANYC; /* any channel is ok */
567 vap->iv_bmissthreshold = IEEE80211_HWBMISS_DEFAULT;
568 vap->iv_dtim_period = IEEE80211_DTIM_DEFAULT;
569 /*
570 * Install a default reset method for the ioctl support;
571 * the driver can override this.
572 */
573 vap->iv_reset = default_reset;
574
575 ieee80211_sysctl_vattach(vap);
576 ieee80211_crypto_vattach(vap);
577 ieee80211_node_vattach(vap);
578 ieee80211_power_vattach(vap);
579 ieee80211_proto_vattach(vap);
580 #ifdef IEEE80211_SUPPORT_SUPERG
581 ieee80211_superg_vattach(vap);
582 #endif
583 ieee80211_ht_vattach(vap);
584 ieee80211_scan_vattach(vap);
585 ieee80211_regdomain_vattach(vap);
586 ieee80211_radiotap_vattach(vap);
587 ieee80211_ratectl_set(vap, IEEE80211_RATECTL_NONE);
588
589 return 0;
590 }
591
592 /*
593 * Activate a vap. State should have been prepared with a
594 * call to ieee80211_vap_setup and by the driver. On return
595 * from this call the vap is ready for use.
596 */
597 int
ieee80211_vap_attach(struct ieee80211vap * vap,ifm_change_cb_t media_change,ifm_stat_cb_t media_stat,const uint8_t macaddr[IEEE80211_ADDR_LEN])598 ieee80211_vap_attach(struct ieee80211vap *vap, ifm_change_cb_t media_change,
599 ifm_stat_cb_t media_stat, const uint8_t macaddr[IEEE80211_ADDR_LEN])
600 {
601 struct ifnet *ifp = vap->iv_ifp;
602 struct ieee80211com *ic = vap->iv_ic;
603 struct ifmediareq imr;
604 int maxrate;
605
606 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
607 "%s: %s parent %s flags 0x%x flags_ext 0x%x\n",
608 __func__, ieee80211_opmode_name[vap->iv_opmode],
609 ic->ic_name, vap->iv_flags, vap->iv_flags_ext);
610
611 /*
612 * Do late attach work that cannot happen until after
613 * the driver has had a chance to override defaults.
614 */
615 ieee80211_node_latevattach(vap);
616 ieee80211_power_latevattach(vap);
617
618 maxrate = ieee80211_media_setup(ic, &vap->iv_media, vap->iv_caps,
619 vap->iv_opmode == IEEE80211_M_STA, media_change, media_stat);
620 ieee80211_media_status(ifp, &imr);
621 /* NB: strip explicit mode; we're actually in autoselect */
622 ifmedia_set(&vap->iv_media,
623 imr.ifm_active &~ (IFM_MMASK | IFM_IEEE80211_TURBO));
624 if (maxrate)
625 ifp->if_baudrate = IF_Mbps(maxrate);
626
627 ether_ifattach(ifp, macaddr);
628 IEEE80211_ADDR_COPY(vap->iv_myaddr, IF_LLADDR(ifp));
629 /* hook output method setup by ether_ifattach */
630 vap->iv_output = ifp->if_output;
631 ifp->if_output = ieee80211_output;
632 /* NB: if_mtu set by ether_ifattach to ETHERMTU */
633
634 IEEE80211_LOCK(ic);
635 TAILQ_INSERT_TAIL(&ic->ic_vaps, vap, iv_next);
636 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
637 #ifdef IEEE80211_SUPPORT_SUPERG
638 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
639 #endif
640 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
641 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
642 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
643 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
644 IEEE80211_UNLOCK(ic);
645
646 return 1;
647 }
648
649 /*
650 * Tear down vap state and reclaim the ifnet.
651 * The driver is assumed to have prepared for
652 * this; e.g. by turning off interrupts for the
653 * underlying device.
654 */
655 void
ieee80211_vap_detach(struct ieee80211vap * vap)656 ieee80211_vap_detach(struct ieee80211vap *vap)
657 {
658 struct ieee80211com *ic = vap->iv_ic;
659 struct ifnet *ifp = vap->iv_ifp;
660
661 CURVNET_SET(ifp->if_vnet);
662
663 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s parent %s\n",
664 __func__, ieee80211_opmode_name[vap->iv_opmode], ic->ic_name);
665
666 /* NB: bpfdetach is called by ether_ifdetach and claims all taps */
667 ether_ifdetach(ifp);
668
669 ieee80211_stop(vap);
670
671 /*
672 * Flush any deferred vap tasks.
673 */
674 ieee80211_draintask(ic, &vap->iv_nstate_task);
675 ieee80211_draintask(ic, &vap->iv_swbmiss_task);
676
677 /* XXX band-aid until ifnet handles this for us */
678 taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
679
680 IEEE80211_LOCK(ic);
681 KASSERT(vap->iv_state == IEEE80211_S_INIT , ("vap still running"));
682 TAILQ_REMOVE(&ic->ic_vaps, vap, iv_next);
683 ieee80211_syncflag_locked(ic, IEEE80211_F_WME);
684 #ifdef IEEE80211_SUPPORT_SUPERG
685 ieee80211_syncflag_locked(ic, IEEE80211_F_TURBOP);
686 #endif
687 ieee80211_syncflag_locked(ic, IEEE80211_F_PCF);
688 ieee80211_syncflag_locked(ic, IEEE80211_F_BURST);
689 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_HT);
690 ieee80211_syncflag_ht_locked(ic, IEEE80211_FHT_USEHT40);
691 /* NB: this handles the bpfdetach done below */
692 ieee80211_syncflag_ext_locked(ic, IEEE80211_FEXT_BPF);
693 if (vap->iv_ifflags & IFF_PROMISC)
694 ieee80211_promisc(vap, false);
695 if (vap->iv_ifflags & IFF_ALLMULTI)
696 ieee80211_allmulti(vap, false);
697 IEEE80211_UNLOCK(ic);
698
699 ifmedia_removeall(&vap->iv_media);
700
701 ieee80211_radiotap_vdetach(vap);
702 ieee80211_regdomain_vdetach(vap);
703 ieee80211_scan_vdetach(vap);
704 #ifdef IEEE80211_SUPPORT_SUPERG
705 ieee80211_superg_vdetach(vap);
706 #endif
707 ieee80211_ht_vdetach(vap);
708 /* NB: must be before ieee80211_node_vdetach */
709 ieee80211_proto_vdetach(vap);
710 ieee80211_crypto_vdetach(vap);
711 ieee80211_power_vdetach(vap);
712 ieee80211_node_vdetach(vap);
713 ieee80211_sysctl_vdetach(vap);
714
715 if_free(ifp);
716
717 CURVNET_RESTORE();
718 }
719
720 /*
721 * Count number of vaps in promisc, and issue promisc on
722 * parent respectively.
723 */
724 void
ieee80211_promisc(struct ieee80211vap * vap,bool on)725 ieee80211_promisc(struct ieee80211vap *vap, bool on)
726 {
727 struct ieee80211com *ic = vap->iv_ic;
728
729 IEEE80211_LOCK_ASSERT(ic);
730
731 if (on) {
732 if (++ic->ic_promisc == 1)
733 ieee80211_runtask(ic, &ic->ic_promisc_task);
734 } else {
735 KASSERT(ic->ic_promisc > 0, ("%s: ic %p not promisc",
736 __func__, ic));
737 if (--ic->ic_promisc == 0)
738 ieee80211_runtask(ic, &ic->ic_promisc_task);
739 }
740 }
741
742 /*
743 * Count number of vaps in allmulti, and issue allmulti on
744 * parent respectively.
745 */
746 void
ieee80211_allmulti(struct ieee80211vap * vap,bool on)747 ieee80211_allmulti(struct ieee80211vap *vap, bool on)
748 {
749 struct ieee80211com *ic = vap->iv_ic;
750
751 IEEE80211_LOCK_ASSERT(ic);
752
753 if (on) {
754 if (++ic->ic_allmulti == 1)
755 ieee80211_runtask(ic, &ic->ic_mcast_task);
756 } else {
757 KASSERT(ic->ic_allmulti > 0, ("%s: ic %p not allmulti",
758 __func__, ic));
759 if (--ic->ic_allmulti == 0)
760 ieee80211_runtask(ic, &ic->ic_mcast_task);
761 }
762 }
763
764 /*
765 * Synchronize flag bit state in the com structure
766 * according to the state of all vap's. This is used,
767 * for example, to handle state changes via ioctls.
768 */
769 static void
ieee80211_syncflag_locked(struct ieee80211com * ic,int flag)770 ieee80211_syncflag_locked(struct ieee80211com *ic, int flag)
771 {
772 struct ieee80211vap *vap;
773 int bit;
774
775 IEEE80211_LOCK_ASSERT(ic);
776
777 bit = 0;
778 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
779 if (vap->iv_flags & flag) {
780 bit = 1;
781 break;
782 }
783 if (bit)
784 ic->ic_flags |= flag;
785 else
786 ic->ic_flags &= ~flag;
787 }
788
789 void
ieee80211_syncflag(struct ieee80211vap * vap,int flag)790 ieee80211_syncflag(struct ieee80211vap *vap, int flag)
791 {
792 struct ieee80211com *ic = vap->iv_ic;
793
794 IEEE80211_LOCK(ic);
795 if (flag < 0) {
796 flag = -flag;
797 vap->iv_flags &= ~flag;
798 } else
799 vap->iv_flags |= flag;
800 ieee80211_syncflag_locked(ic, flag);
801 IEEE80211_UNLOCK(ic);
802 }
803
804 /*
805 * Synchronize flags_ht bit state in the com structure
806 * according to the state of all vap's. This is used,
807 * for example, to handle state changes via ioctls.
808 */
809 static void
ieee80211_syncflag_ht_locked(struct ieee80211com * ic,int flag)810 ieee80211_syncflag_ht_locked(struct ieee80211com *ic, int flag)
811 {
812 struct ieee80211vap *vap;
813 int bit;
814
815 IEEE80211_LOCK_ASSERT(ic);
816
817 bit = 0;
818 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
819 if (vap->iv_flags_ht & flag) {
820 bit = 1;
821 break;
822 }
823 if (bit)
824 ic->ic_flags_ht |= flag;
825 else
826 ic->ic_flags_ht &= ~flag;
827 }
828
829 void
ieee80211_syncflag_ht(struct ieee80211vap * vap,int flag)830 ieee80211_syncflag_ht(struct ieee80211vap *vap, int flag)
831 {
832 struct ieee80211com *ic = vap->iv_ic;
833
834 IEEE80211_LOCK(ic);
835 if (flag < 0) {
836 flag = -flag;
837 vap->iv_flags_ht &= ~flag;
838 } else
839 vap->iv_flags_ht |= flag;
840 ieee80211_syncflag_ht_locked(ic, flag);
841 IEEE80211_UNLOCK(ic);
842 }
843
844 /*
845 * Synchronize flags_ext bit state in the com structure
846 * according to the state of all vap's. This is used,
847 * for example, to handle state changes via ioctls.
848 */
849 static void
ieee80211_syncflag_ext_locked(struct ieee80211com * ic,int flag)850 ieee80211_syncflag_ext_locked(struct ieee80211com *ic, int flag)
851 {
852 struct ieee80211vap *vap;
853 int bit;
854
855 IEEE80211_LOCK_ASSERT(ic);
856
857 bit = 0;
858 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next)
859 if (vap->iv_flags_ext & flag) {
860 bit = 1;
861 break;
862 }
863 if (bit)
864 ic->ic_flags_ext |= flag;
865 else
866 ic->ic_flags_ext &= ~flag;
867 }
868
869 void
ieee80211_syncflag_ext(struct ieee80211vap * vap,int flag)870 ieee80211_syncflag_ext(struct ieee80211vap *vap, int flag)
871 {
872 struct ieee80211com *ic = vap->iv_ic;
873
874 IEEE80211_LOCK(ic);
875 if (flag < 0) {
876 flag = -flag;
877 vap->iv_flags_ext &= ~flag;
878 } else
879 vap->iv_flags_ext |= flag;
880 ieee80211_syncflag_ext_locked(ic, flag);
881 IEEE80211_UNLOCK(ic);
882 }
883
884 static __inline int
mapgsm(u_int freq,u_int flags)885 mapgsm(u_int freq, u_int flags)
886 {
887 freq *= 10;
888 if (flags & IEEE80211_CHAN_QUARTER)
889 freq += 5;
890 else if (flags & IEEE80211_CHAN_HALF)
891 freq += 10;
892 else
893 freq += 20;
894 /* NB: there is no 907/20 wide but leave room */
895 return (freq - 906*10) / 5;
896 }
897
898 static __inline int
mappsb(u_int freq,u_int flags)899 mappsb(u_int freq, u_int flags)
900 {
901 return 37 + ((freq * 10) + ((freq % 5) == 2 ? 5 : 0) - 49400) / 5;
902 }
903
904 /*
905 * Convert MHz frequency to IEEE channel number.
906 */
907 int
ieee80211_mhz2ieee(u_int freq,u_int flags)908 ieee80211_mhz2ieee(u_int freq, u_int flags)
909 {
910 #define IS_FREQ_IN_PSB(_freq) ((_freq) > 4940 && (_freq) < 4990)
911 if (flags & IEEE80211_CHAN_GSM)
912 return mapgsm(freq, flags);
913 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
914 if (freq == 2484)
915 return 14;
916 if (freq < 2484)
917 return ((int) freq - 2407) / 5;
918 else
919 return 15 + ((freq - 2512) / 20);
920 } else if (flags & IEEE80211_CHAN_5GHZ) { /* 5Ghz band */
921 if (freq <= 5000) {
922 /* XXX check regdomain? */
923 if (IS_FREQ_IN_PSB(freq))
924 return mappsb(freq, flags);
925 return (freq - 4000) / 5;
926 } else
927 return (freq - 5000) / 5;
928 } else { /* either, guess */
929 if (freq == 2484)
930 return 14;
931 if (freq < 2484) {
932 if (907 <= freq && freq <= 922)
933 return mapgsm(freq, flags);
934 return ((int) freq - 2407) / 5;
935 }
936 if (freq < 5000) {
937 if (IS_FREQ_IN_PSB(freq))
938 return mappsb(freq, flags);
939 else if (freq > 4900)
940 return (freq - 4000) / 5;
941 else
942 return 15 + ((freq - 2512) / 20);
943 }
944 return (freq - 5000) / 5;
945 }
946 #undef IS_FREQ_IN_PSB
947 }
948
949 /*
950 * Convert channel to IEEE channel number.
951 */
952 int
ieee80211_chan2ieee(struct ieee80211com * ic,const struct ieee80211_channel * c)953 ieee80211_chan2ieee(struct ieee80211com *ic, const struct ieee80211_channel *c)
954 {
955 if (c == NULL) {
956 ic_printf(ic, "invalid channel (NULL)\n");
957 return 0; /* XXX */
958 }
959 return (c == IEEE80211_CHAN_ANYC ? IEEE80211_CHAN_ANY : c->ic_ieee);
960 }
961
962 /*
963 * Convert IEEE channel number to MHz frequency.
964 */
965 u_int
ieee80211_ieee2mhz(u_int chan,u_int flags)966 ieee80211_ieee2mhz(u_int chan, u_int flags)
967 {
968 if (flags & IEEE80211_CHAN_GSM)
969 return 907 + 5 * (chan / 10);
970 if (flags & IEEE80211_CHAN_2GHZ) { /* 2GHz band */
971 if (chan == 14)
972 return 2484;
973 if (chan < 14)
974 return 2407 + chan*5;
975 else
976 return 2512 + ((chan-15)*20);
977 } else if (flags & IEEE80211_CHAN_5GHZ) {/* 5Ghz band */
978 if (flags & (IEEE80211_CHAN_HALF|IEEE80211_CHAN_QUARTER)) {
979 chan -= 37;
980 return 4940 + chan*5 + (chan % 5 ? 2 : 0);
981 }
982 return 5000 + (chan*5);
983 } else { /* either, guess */
984 /* XXX can't distinguish PSB+GSM channels */
985 if (chan == 14)
986 return 2484;
987 if (chan < 14) /* 0-13 */
988 return 2407 + chan*5;
989 if (chan < 27) /* 15-26 */
990 return 2512 + ((chan-15)*20);
991 return 5000 + (chan*5);
992 }
993 }
994
995 static __inline void
set_extchan(struct ieee80211_channel * c)996 set_extchan(struct ieee80211_channel *c)
997 {
998
999 /*
1000 * IEEE Std 802.11-2012, page 1738, subclause 20.3.15.4:
1001 * "the secondary channel number shall be 'N + [1,-1] * 4'
1002 */
1003 if (c->ic_flags & IEEE80211_CHAN_HT40U)
1004 c->ic_extieee = c->ic_ieee + 4;
1005 else if (c->ic_flags & IEEE80211_CHAN_HT40D)
1006 c->ic_extieee = c->ic_ieee - 4;
1007 else
1008 c->ic_extieee = 0;
1009 }
1010
1011 static int
addchan(struct ieee80211_channel chans[],int maxchans,int * nchans,uint8_t ieee,uint16_t freq,int8_t maxregpower,uint32_t flags)1012 addchan(struct ieee80211_channel chans[], int maxchans, int *nchans,
1013 uint8_t ieee, uint16_t freq, int8_t maxregpower, uint32_t flags)
1014 {
1015 struct ieee80211_channel *c;
1016
1017 if (*nchans >= maxchans)
1018 return (ENOBUFS);
1019
1020 c = &chans[(*nchans)++];
1021 c->ic_ieee = ieee;
1022 c->ic_freq = freq != 0 ? freq : ieee80211_ieee2mhz(ieee, flags);
1023 c->ic_maxregpower = maxregpower;
1024 c->ic_maxpower = 2 * maxregpower;
1025 c->ic_flags = flags;
1026 set_extchan(c);
1027
1028 return (0);
1029 }
1030
1031 static int
copychan_prev(struct ieee80211_channel chans[],int maxchans,int * nchans,uint32_t flags)1032 copychan_prev(struct ieee80211_channel chans[], int maxchans, int *nchans,
1033 uint32_t flags)
1034 {
1035 struct ieee80211_channel *c;
1036
1037 KASSERT(*nchans > 0, ("channel list is empty\n"));
1038
1039 if (*nchans >= maxchans)
1040 return (ENOBUFS);
1041
1042 c = &chans[(*nchans)++];
1043 c[0] = c[-1];
1044 c->ic_flags = flags;
1045 set_extchan(c);
1046
1047 return (0);
1048 }
1049
1050 static void
getflags_2ghz(const uint8_t bands[],uint32_t flags[],int ht40)1051 getflags_2ghz(const uint8_t bands[], uint32_t flags[], int ht40)
1052 {
1053 int nmodes;
1054
1055 nmodes = 0;
1056 if (isset(bands, IEEE80211_MODE_11B))
1057 flags[nmodes++] = IEEE80211_CHAN_B;
1058 if (isset(bands, IEEE80211_MODE_11G))
1059 flags[nmodes++] = IEEE80211_CHAN_G;
1060 if (isset(bands, IEEE80211_MODE_11NG))
1061 flags[nmodes++] = IEEE80211_CHAN_G | IEEE80211_CHAN_HT20;
1062 if (ht40) {
1063 flags[nmodes++] = IEEE80211_CHAN_G | IEEE80211_CHAN_HT40U;
1064 flags[nmodes++] = IEEE80211_CHAN_G | IEEE80211_CHAN_HT40D;
1065 }
1066 flags[nmodes] = 0;
1067 }
1068
1069 static void
getflags_5ghz(const uint8_t bands[],uint32_t flags[],int ht40)1070 getflags_5ghz(const uint8_t bands[], uint32_t flags[], int ht40)
1071 {
1072 int nmodes;
1073
1074 nmodes = 0;
1075 if (isset(bands, IEEE80211_MODE_11A))
1076 flags[nmodes++] = IEEE80211_CHAN_A;
1077 if (isset(bands, IEEE80211_MODE_11NA))
1078 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT20;
1079 if (ht40) {
1080 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40U;
1081 flags[nmodes++] = IEEE80211_CHAN_A | IEEE80211_CHAN_HT40D;
1082 }
1083 flags[nmodes] = 0;
1084 }
1085
1086 static void
getflags(const uint8_t bands[],uint32_t flags[],int ht40)1087 getflags(const uint8_t bands[], uint32_t flags[], int ht40)
1088 {
1089
1090 flags[0] = 0;
1091 if (isset(bands, IEEE80211_MODE_11A) ||
1092 isset(bands, IEEE80211_MODE_11NA)) {
1093 if (isset(bands, IEEE80211_MODE_11B) ||
1094 isset(bands, IEEE80211_MODE_11G) ||
1095 isset(bands, IEEE80211_MODE_11NG))
1096 return;
1097
1098 getflags_5ghz(bands, flags, ht40);
1099 } else
1100 getflags_2ghz(bands, flags, ht40);
1101 }
1102
1103 /*
1104 * Add one 20 MHz channel into specified channel list.
1105 */
1106 int
ieee80211_add_channel(struct ieee80211_channel chans[],int maxchans,int * nchans,uint8_t ieee,uint16_t freq,int8_t maxregpower,uint32_t chan_flags,const uint8_t bands[])1107 ieee80211_add_channel(struct ieee80211_channel chans[], int maxchans,
1108 int *nchans, uint8_t ieee, uint16_t freq, int8_t maxregpower,
1109 uint32_t chan_flags, const uint8_t bands[])
1110 {
1111 uint32_t flags[IEEE80211_MODE_MAX];
1112 int i, error;
1113
1114 getflags(bands, flags, 0);
1115 KASSERT(flags[0] != 0, ("%s: no correct mode provided\n", __func__));
1116
1117 error = addchan(chans, maxchans, nchans, ieee, freq, maxregpower,
1118 flags[0] | chan_flags);
1119 for (i = 1; flags[i] != 0 && error == 0; i++) {
1120 error = copychan_prev(chans, maxchans, nchans,
1121 flags[i] | chan_flags);
1122 }
1123
1124 return (error);
1125 }
1126
1127 static struct ieee80211_channel *
findchannel(struct ieee80211_channel chans[],int nchans,uint16_t freq,uint32_t flags)1128 findchannel(struct ieee80211_channel chans[], int nchans, uint16_t freq,
1129 uint32_t flags)
1130 {
1131 struct ieee80211_channel *c;
1132 int i;
1133
1134 flags &= IEEE80211_CHAN_ALLTURBO;
1135 /* brute force search */
1136 for (i = 0; i < nchans; i++) {
1137 c = &chans[i];
1138 if (c->ic_freq == freq &&
1139 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
1140 return c;
1141 }
1142 return NULL;
1143 }
1144
1145 /*
1146 * Add 40 MHz channel pair into specified channel list.
1147 */
1148 int
ieee80211_add_channel_ht40(struct ieee80211_channel chans[],int maxchans,int * nchans,uint8_t ieee,int8_t maxregpower,uint32_t flags)1149 ieee80211_add_channel_ht40(struct ieee80211_channel chans[], int maxchans,
1150 int *nchans, uint8_t ieee, int8_t maxregpower, uint32_t flags)
1151 {
1152 struct ieee80211_channel *cent, *extc;
1153 uint16_t freq;
1154 int error;
1155
1156 freq = ieee80211_ieee2mhz(ieee, flags);
1157
1158 /*
1159 * Each entry defines an HT40 channel pair; find the
1160 * center channel, then the extension channel above.
1161 */
1162 flags |= IEEE80211_CHAN_HT20;
1163 cent = findchannel(chans, *nchans, freq, flags);
1164 if (cent == NULL)
1165 return (EINVAL);
1166
1167 extc = findchannel(chans, *nchans, freq + 20, flags);
1168 if (extc == NULL)
1169 return (ENOENT);
1170
1171 flags &= ~IEEE80211_CHAN_HT;
1172 error = addchan(chans, maxchans, nchans, cent->ic_ieee, cent->ic_freq,
1173 maxregpower, flags | IEEE80211_CHAN_HT40U);
1174 if (error != 0)
1175 return (error);
1176
1177 error = addchan(chans, maxchans, nchans, extc->ic_ieee, extc->ic_freq,
1178 maxregpower, flags | IEEE80211_CHAN_HT40D);
1179
1180 return (error);
1181 }
1182
1183 /*
1184 * Adds channels into specified channel list (ieee[] array must be sorted).
1185 * Channels are already sorted.
1186 */
1187 static int
add_chanlist(struct ieee80211_channel chans[],int maxchans,int * nchans,const uint8_t ieee[],int nieee,uint32_t flags[])1188 add_chanlist(struct ieee80211_channel chans[], int maxchans, int *nchans,
1189 const uint8_t ieee[], int nieee, uint32_t flags[])
1190 {
1191 uint16_t freq;
1192 int i, j, error;
1193
1194 for (i = 0; i < nieee; i++) {
1195 freq = ieee80211_ieee2mhz(ieee[i], flags[0]);
1196 for (j = 0; flags[j] != 0; j++) {
1197 if (flags[j] & IEEE80211_CHAN_HT40D)
1198 if (i == 0 || ieee[i] < ieee[0] + 4 ||
1199 freq - 20 !=
1200 ieee80211_ieee2mhz(ieee[i] - 4, flags[j]))
1201 continue;
1202 if (flags[j] & IEEE80211_CHAN_HT40U)
1203 if (i == nieee - 1 ||
1204 ieee[i] + 4 > ieee[nieee - 1] ||
1205 freq + 20 !=
1206 ieee80211_ieee2mhz(ieee[i] + 4, flags[j]))
1207 continue;
1208
1209 if (j == 0) {
1210 error = addchan(chans, maxchans, nchans,
1211 ieee[i], freq, 0, flags[j]);
1212 } else {
1213 error = copychan_prev(chans, maxchans, nchans,
1214 flags[j]);
1215 }
1216 if (error != 0)
1217 return (error);
1218 }
1219 }
1220
1221 return (0);
1222 }
1223
1224 int
ieee80211_add_channel_list_2ghz(struct ieee80211_channel chans[],int maxchans,int * nchans,const uint8_t ieee[],int nieee,const uint8_t bands[],int ht40)1225 ieee80211_add_channel_list_2ghz(struct ieee80211_channel chans[], int maxchans,
1226 int *nchans, const uint8_t ieee[], int nieee, const uint8_t bands[],
1227 int ht40)
1228 {
1229 uint32_t flags[IEEE80211_MODE_MAX];
1230
1231 getflags_2ghz(bands, flags, ht40);
1232 KASSERT(flags[0] != 0, ("%s: no correct mode provided\n", __func__));
1233
1234 return (add_chanlist(chans, maxchans, nchans, ieee, nieee, flags));
1235 }
1236
1237 int
ieee80211_add_channels_default_2ghz(struct ieee80211_channel chans[],int maxchans,int * nchans,const uint8_t bands[],int ht40)1238 ieee80211_add_channels_default_2ghz(struct ieee80211_channel chans[],
1239 int maxchans, int *nchans, const uint8_t bands[], int ht40)
1240 {
1241 const uint8_t default_chan_list[] =
1242 { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 };
1243
1244 return (ieee80211_add_channel_list_2ghz(chans, maxchans, nchans,
1245 default_chan_list, nitems(default_chan_list), bands, ht40));
1246 }
1247
1248 int
ieee80211_add_channel_list_5ghz(struct ieee80211_channel chans[],int maxchans,int * nchans,const uint8_t ieee[],int nieee,const uint8_t bands[],int ht40)1249 ieee80211_add_channel_list_5ghz(struct ieee80211_channel chans[], int maxchans,
1250 int *nchans, const uint8_t ieee[], int nieee, const uint8_t bands[],
1251 int ht40)
1252 {
1253 uint32_t flags[IEEE80211_MODE_MAX];
1254
1255 getflags_5ghz(bands, flags, ht40);
1256 KASSERT(flags[0] != 0, ("%s: no correct mode provided\n", __func__));
1257
1258 return (add_chanlist(chans, maxchans, nchans, ieee, nieee, flags));
1259 }
1260
1261 /*
1262 * Locate a channel given a frequency+flags. We cache
1263 * the previous lookup to optimize switching between two
1264 * channels--as happens with dynamic turbo.
1265 */
1266 struct ieee80211_channel *
ieee80211_find_channel(struct ieee80211com * ic,int freq,int flags)1267 ieee80211_find_channel(struct ieee80211com *ic, int freq, int flags)
1268 {
1269 struct ieee80211_channel *c;
1270
1271 flags &= IEEE80211_CHAN_ALLTURBO;
1272 c = ic->ic_prevchan;
1273 if (c != NULL && c->ic_freq == freq &&
1274 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
1275 return c;
1276 /* brute force search */
1277 return (findchannel(ic->ic_channels, ic->ic_nchans, freq, flags));
1278 }
1279
1280 /*
1281 * Locate a channel given a channel number+flags. We cache
1282 * the previous lookup to optimize switching between two
1283 * channels--as happens with dynamic turbo.
1284 */
1285 struct ieee80211_channel *
ieee80211_find_channel_byieee(struct ieee80211com * ic,int ieee,int flags)1286 ieee80211_find_channel_byieee(struct ieee80211com *ic, int ieee, int flags)
1287 {
1288 struct ieee80211_channel *c;
1289 int i;
1290
1291 flags &= IEEE80211_CHAN_ALLTURBO;
1292 c = ic->ic_prevchan;
1293 if (c != NULL && c->ic_ieee == ieee &&
1294 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
1295 return c;
1296 /* brute force search */
1297 for (i = 0; i < ic->ic_nchans; i++) {
1298 c = &ic->ic_channels[i];
1299 if (c->ic_ieee == ieee &&
1300 (c->ic_flags & IEEE80211_CHAN_ALLTURBO) == flags)
1301 return c;
1302 }
1303 return NULL;
1304 }
1305
1306 /*
1307 * Lookup a channel suitable for the given rx status.
1308 *
1309 * This is used to find a channel for a frame (eg beacon, probe
1310 * response) based purely on the received PHY information.
1311 *
1312 * For now it tries to do it based on R_FREQ / R_IEEE.
1313 * This is enough for 11bg and 11a (and thus 11ng/11na)
1314 * but it will not be enough for GSM, PSB channels and the
1315 * like. It also doesn't know about legacy-turbog and
1316 * legacy-turbo modes, which some offload NICs actually
1317 * support in weird ways.
1318 *
1319 * Takes the ic and rxstatus; returns the channel or NULL
1320 * if not found.
1321 *
1322 * XXX TODO: Add support for that when the need arises.
1323 */
1324 struct ieee80211_channel *
ieee80211_lookup_channel_rxstatus(struct ieee80211vap * vap,const struct ieee80211_rx_stats * rxs)1325 ieee80211_lookup_channel_rxstatus(struct ieee80211vap *vap,
1326 const struct ieee80211_rx_stats *rxs)
1327 {
1328 struct ieee80211com *ic = vap->iv_ic;
1329 uint32_t flags;
1330 struct ieee80211_channel *c;
1331
1332 if (rxs == NULL)
1333 return (NULL);
1334
1335 /*
1336 * Strictly speaking we only use freq for now,
1337 * however later on we may wish to just store
1338 * the ieee for verification.
1339 */
1340 if ((rxs->r_flags & IEEE80211_R_FREQ) == 0)
1341 return (NULL);
1342 if ((rxs->r_flags & IEEE80211_R_IEEE) == 0)
1343 return (NULL);
1344
1345 /*
1346 * If the rx status contains a valid ieee/freq, then
1347 * ensure we populate the correct channel information
1348 * in rxchan before passing it up to the scan infrastructure.
1349 * Offload NICs will pass up beacons from all channels
1350 * during background scans.
1351 */
1352
1353 /* Determine a band */
1354 /* XXX should be done by the driver? */
1355 if (rxs->c_freq < 3000) {
1356 flags = IEEE80211_CHAN_G;
1357 } else {
1358 flags = IEEE80211_CHAN_A;
1359 }
1360
1361 /* Channel lookup */
1362 c = ieee80211_find_channel(ic, rxs->c_freq, flags);
1363
1364 IEEE80211_DPRINTF(vap, IEEE80211_MSG_INPUT,
1365 "%s: freq=%d, ieee=%d, flags=0x%08x; c=%p\n",
1366 __func__,
1367 (int) rxs->c_freq,
1368 (int) rxs->c_ieee,
1369 flags,
1370 c);
1371
1372 return (c);
1373 }
1374
1375 static void
addmedia(struct ifmedia * media,int caps,int addsta,int mode,int mword)1376 addmedia(struct ifmedia *media, int caps, int addsta, int mode, int mword)
1377 {
1378 #define ADD(_ic, _s, _o) \
1379 ifmedia_add(media, \
1380 IFM_MAKEWORD(IFM_IEEE80211, (_s), (_o), 0), 0, NULL)
1381 static const u_int mopts[IEEE80211_MODE_MAX] = {
1382 [IEEE80211_MODE_AUTO] = IFM_AUTO,
1383 [IEEE80211_MODE_11A] = IFM_IEEE80211_11A,
1384 [IEEE80211_MODE_11B] = IFM_IEEE80211_11B,
1385 [IEEE80211_MODE_11G] = IFM_IEEE80211_11G,
1386 [IEEE80211_MODE_FH] = IFM_IEEE80211_FH,
1387 [IEEE80211_MODE_TURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
1388 [IEEE80211_MODE_TURBO_G] = IFM_IEEE80211_11G|IFM_IEEE80211_TURBO,
1389 [IEEE80211_MODE_STURBO_A] = IFM_IEEE80211_11A|IFM_IEEE80211_TURBO,
1390 [IEEE80211_MODE_HALF] = IFM_IEEE80211_11A, /* XXX */
1391 [IEEE80211_MODE_QUARTER] = IFM_IEEE80211_11A, /* XXX */
1392 [IEEE80211_MODE_11NA] = IFM_IEEE80211_11NA,
1393 [IEEE80211_MODE_11NG] = IFM_IEEE80211_11NG,
1394 };
1395 u_int mopt;
1396
1397 mopt = mopts[mode];
1398 if (addsta)
1399 ADD(ic, mword, mopt); /* STA mode has no cap */
1400 if (caps & IEEE80211_C_IBSS)
1401 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC);
1402 if (caps & IEEE80211_C_HOSTAP)
1403 ADD(media, mword, mopt | IFM_IEEE80211_HOSTAP);
1404 if (caps & IEEE80211_C_AHDEMO)
1405 ADD(media, mword, mopt | IFM_IEEE80211_ADHOC | IFM_FLAG0);
1406 if (caps & IEEE80211_C_MONITOR)
1407 ADD(media, mword, mopt | IFM_IEEE80211_MONITOR);
1408 if (caps & IEEE80211_C_WDS)
1409 ADD(media, mword, mopt | IFM_IEEE80211_WDS);
1410 if (caps & IEEE80211_C_MBSS)
1411 ADD(media, mword, mopt | IFM_IEEE80211_MBSS);
1412 #undef ADD
1413 }
1414
1415 /*
1416 * Setup the media data structures according to the channel and
1417 * rate tables.
1418 */
1419 static int
ieee80211_media_setup(struct ieee80211com * ic,struct ifmedia * media,int caps,int addsta,ifm_change_cb_t media_change,ifm_stat_cb_t media_stat)1420 ieee80211_media_setup(struct ieee80211com *ic,
1421 struct ifmedia *media, int caps, int addsta,
1422 ifm_change_cb_t media_change, ifm_stat_cb_t media_stat)
1423 {
1424 int i, j, rate, maxrate, mword, r;
1425 enum ieee80211_phymode mode;
1426 const struct ieee80211_rateset *rs;
1427 struct ieee80211_rateset allrates;
1428
1429 /*
1430 * Fill in media characteristics.
1431 */
1432 ifmedia_init(media, 0, media_change, media_stat);
1433 maxrate = 0;
1434 /*
1435 * Add media for legacy operating modes.
1436 */
1437 memset(&allrates, 0, sizeof(allrates));
1438 for (mode = IEEE80211_MODE_AUTO; mode < IEEE80211_MODE_11NA; mode++) {
1439 if (isclr(ic->ic_modecaps, mode))
1440 continue;
1441 addmedia(media, caps, addsta, mode, IFM_AUTO);
1442 if (mode == IEEE80211_MODE_AUTO)
1443 continue;
1444 rs = &ic->ic_sup_rates[mode];
1445 for (i = 0; i < rs->rs_nrates; i++) {
1446 rate = rs->rs_rates[i];
1447 mword = ieee80211_rate2media(ic, rate, mode);
1448 if (mword == 0)
1449 continue;
1450 addmedia(media, caps, addsta, mode, mword);
1451 /*
1452 * Add legacy rate to the collection of all rates.
1453 */
1454 r = rate & IEEE80211_RATE_VAL;
1455 for (j = 0; j < allrates.rs_nrates; j++)
1456 if (allrates.rs_rates[j] == r)
1457 break;
1458 if (j == allrates.rs_nrates) {
1459 /* unique, add to the set */
1460 allrates.rs_rates[j] = r;
1461 allrates.rs_nrates++;
1462 }
1463 rate = (rate & IEEE80211_RATE_VAL) / 2;
1464 if (rate > maxrate)
1465 maxrate = rate;
1466 }
1467 }
1468 for (i = 0; i < allrates.rs_nrates; i++) {
1469 mword = ieee80211_rate2media(ic, allrates.rs_rates[i],
1470 IEEE80211_MODE_AUTO);
1471 if (mword == 0)
1472 continue;
1473 /* NB: remove media options from mword */
1474 addmedia(media, caps, addsta,
1475 IEEE80211_MODE_AUTO, IFM_SUBTYPE(mword));
1476 }
1477 /*
1478 * Add HT/11n media. Note that we do not have enough
1479 * bits in the media subtype to express the MCS so we
1480 * use a "placeholder" media subtype and any fixed MCS
1481 * must be specified with a different mechanism.
1482 */
1483 for (; mode <= IEEE80211_MODE_11NG; mode++) {
1484 if (isclr(ic->ic_modecaps, mode))
1485 continue;
1486 addmedia(media, caps, addsta, mode, IFM_AUTO);
1487 addmedia(media, caps, addsta, mode, IFM_IEEE80211_MCS);
1488 }
1489 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) ||
1490 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) {
1491 addmedia(media, caps, addsta,
1492 IEEE80211_MODE_AUTO, IFM_IEEE80211_MCS);
1493 i = ic->ic_txstream * 8 - 1;
1494 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) &&
1495 (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40))
1496 rate = ieee80211_htrates[i].ht40_rate_400ns;
1497 else if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40))
1498 rate = ieee80211_htrates[i].ht40_rate_800ns;
1499 else if ((ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20))
1500 rate = ieee80211_htrates[i].ht20_rate_400ns;
1501 else
1502 rate = ieee80211_htrates[i].ht20_rate_800ns;
1503 if (rate > maxrate)
1504 maxrate = rate;
1505 }
1506 return maxrate;
1507 }
1508
1509 /* XXX inline or eliminate? */
1510 const struct ieee80211_rateset *
ieee80211_get_suprates(struct ieee80211com * ic,const struct ieee80211_channel * c)1511 ieee80211_get_suprates(struct ieee80211com *ic, const struct ieee80211_channel *c)
1512 {
1513 /* XXX does this work for 11ng basic rates? */
1514 return &ic->ic_sup_rates[ieee80211_chan2mode(c)];
1515 }
1516
1517 void
ieee80211_announce(struct ieee80211com * ic)1518 ieee80211_announce(struct ieee80211com *ic)
1519 {
1520 int i, rate, mword;
1521 enum ieee80211_phymode mode;
1522 const struct ieee80211_rateset *rs;
1523
1524 /* NB: skip AUTO since it has no rates */
1525 for (mode = IEEE80211_MODE_AUTO+1; mode < IEEE80211_MODE_11NA; mode++) {
1526 if (isclr(ic->ic_modecaps, mode))
1527 continue;
1528 ic_printf(ic, "%s rates: ", ieee80211_phymode_name[mode]);
1529 rs = &ic->ic_sup_rates[mode];
1530 for (i = 0; i < rs->rs_nrates; i++) {
1531 mword = ieee80211_rate2media(ic, rs->rs_rates[i], mode);
1532 if (mword == 0)
1533 continue;
1534 rate = ieee80211_media2rate(mword);
1535 printf("%s%d%sMbps", (i != 0 ? " " : ""),
1536 rate / 2, ((rate & 0x1) != 0 ? ".5" : ""));
1537 }
1538 printf("\n");
1539 }
1540 ieee80211_ht_announce(ic);
1541 }
1542
1543 void
ieee80211_announce_channels(struct ieee80211com * ic)1544 ieee80211_announce_channels(struct ieee80211com *ic)
1545 {
1546 const struct ieee80211_channel *c;
1547 char type;
1548 int i, cw;
1549
1550 printf("Chan Freq CW RegPwr MinPwr MaxPwr\n");
1551 for (i = 0; i < ic->ic_nchans; i++) {
1552 c = &ic->ic_channels[i];
1553 if (IEEE80211_IS_CHAN_ST(c))
1554 type = 'S';
1555 else if (IEEE80211_IS_CHAN_108A(c))
1556 type = 'T';
1557 else if (IEEE80211_IS_CHAN_108G(c))
1558 type = 'G';
1559 else if (IEEE80211_IS_CHAN_HT(c))
1560 type = 'n';
1561 else if (IEEE80211_IS_CHAN_A(c))
1562 type = 'a';
1563 else if (IEEE80211_IS_CHAN_ANYG(c))
1564 type = 'g';
1565 else if (IEEE80211_IS_CHAN_B(c))
1566 type = 'b';
1567 else
1568 type = 'f';
1569 if (IEEE80211_IS_CHAN_HT40(c) || IEEE80211_IS_CHAN_TURBO(c))
1570 cw = 40;
1571 else if (IEEE80211_IS_CHAN_HALF(c))
1572 cw = 10;
1573 else if (IEEE80211_IS_CHAN_QUARTER(c))
1574 cw = 5;
1575 else
1576 cw = 20;
1577 printf("%4d %4d%c %2d%c %6d %4d.%d %4d.%d\n"
1578 , c->ic_ieee, c->ic_freq, type
1579 , cw
1580 , IEEE80211_IS_CHAN_HT40U(c) ? '+' :
1581 IEEE80211_IS_CHAN_HT40D(c) ? '-' : ' '
1582 , c->ic_maxregpower
1583 , c->ic_minpower / 2, c->ic_minpower & 1 ? 5 : 0
1584 , c->ic_maxpower / 2, c->ic_maxpower & 1 ? 5 : 0
1585 );
1586 }
1587 }
1588
1589 static int
media2mode(const struct ifmedia_entry * ime,uint32_t flags,uint16_t * mode)1590 media2mode(const struct ifmedia_entry *ime, uint32_t flags, uint16_t *mode)
1591 {
1592 switch (IFM_MODE(ime->ifm_media)) {
1593 case IFM_IEEE80211_11A:
1594 *mode = IEEE80211_MODE_11A;
1595 break;
1596 case IFM_IEEE80211_11B:
1597 *mode = IEEE80211_MODE_11B;
1598 break;
1599 case IFM_IEEE80211_11G:
1600 *mode = IEEE80211_MODE_11G;
1601 break;
1602 case IFM_IEEE80211_FH:
1603 *mode = IEEE80211_MODE_FH;
1604 break;
1605 case IFM_IEEE80211_11NA:
1606 *mode = IEEE80211_MODE_11NA;
1607 break;
1608 case IFM_IEEE80211_11NG:
1609 *mode = IEEE80211_MODE_11NG;
1610 break;
1611 case IFM_AUTO:
1612 *mode = IEEE80211_MODE_AUTO;
1613 break;
1614 default:
1615 return 0;
1616 }
1617 /*
1618 * Turbo mode is an ``option''.
1619 * XXX does not apply to AUTO
1620 */
1621 if (ime->ifm_media & IFM_IEEE80211_TURBO) {
1622 if (*mode == IEEE80211_MODE_11A) {
1623 if (flags & IEEE80211_F_TURBOP)
1624 *mode = IEEE80211_MODE_TURBO_A;
1625 else
1626 *mode = IEEE80211_MODE_STURBO_A;
1627 } else if (*mode == IEEE80211_MODE_11G)
1628 *mode = IEEE80211_MODE_TURBO_G;
1629 else
1630 return 0;
1631 }
1632 /* XXX HT40 +/- */
1633 return 1;
1634 }
1635
1636 /*
1637 * Handle a media change request on the vap interface.
1638 */
1639 int
ieee80211_media_change(struct ifnet * ifp)1640 ieee80211_media_change(struct ifnet *ifp)
1641 {
1642 struct ieee80211vap *vap = ifp->if_softc;
1643 struct ifmedia_entry *ime = vap->iv_media.ifm_cur;
1644 uint16_t newmode;
1645
1646 if (!media2mode(ime, vap->iv_flags, &newmode))
1647 return EINVAL;
1648 if (vap->iv_des_mode != newmode) {
1649 vap->iv_des_mode = newmode;
1650 /* XXX kick state machine if up+running */
1651 }
1652 return 0;
1653 }
1654
1655 /*
1656 * Common code to calculate the media status word
1657 * from the operating mode and channel state.
1658 */
1659 static int
media_status(enum ieee80211_opmode opmode,const struct ieee80211_channel * chan)1660 media_status(enum ieee80211_opmode opmode, const struct ieee80211_channel *chan)
1661 {
1662 int status;
1663
1664 status = IFM_IEEE80211;
1665 switch (opmode) {
1666 case IEEE80211_M_STA:
1667 break;
1668 case IEEE80211_M_IBSS:
1669 status |= IFM_IEEE80211_ADHOC;
1670 break;
1671 case IEEE80211_M_HOSTAP:
1672 status |= IFM_IEEE80211_HOSTAP;
1673 break;
1674 case IEEE80211_M_MONITOR:
1675 status |= IFM_IEEE80211_MONITOR;
1676 break;
1677 case IEEE80211_M_AHDEMO:
1678 status |= IFM_IEEE80211_ADHOC | IFM_FLAG0;
1679 break;
1680 case IEEE80211_M_WDS:
1681 status |= IFM_IEEE80211_WDS;
1682 break;
1683 case IEEE80211_M_MBSS:
1684 status |= IFM_IEEE80211_MBSS;
1685 break;
1686 }
1687 if (IEEE80211_IS_CHAN_HTA(chan)) {
1688 status |= IFM_IEEE80211_11NA;
1689 } else if (IEEE80211_IS_CHAN_HTG(chan)) {
1690 status |= IFM_IEEE80211_11NG;
1691 } else if (IEEE80211_IS_CHAN_A(chan)) {
1692 status |= IFM_IEEE80211_11A;
1693 } else if (IEEE80211_IS_CHAN_B(chan)) {
1694 status |= IFM_IEEE80211_11B;
1695 } else if (IEEE80211_IS_CHAN_ANYG(chan)) {
1696 status |= IFM_IEEE80211_11G;
1697 } else if (IEEE80211_IS_CHAN_FHSS(chan)) {
1698 status |= IFM_IEEE80211_FH;
1699 }
1700 /* XXX else complain? */
1701
1702 if (IEEE80211_IS_CHAN_TURBO(chan))
1703 status |= IFM_IEEE80211_TURBO;
1704 #if 0
1705 if (IEEE80211_IS_CHAN_HT20(chan))
1706 status |= IFM_IEEE80211_HT20;
1707 if (IEEE80211_IS_CHAN_HT40(chan))
1708 status |= IFM_IEEE80211_HT40;
1709 #endif
1710 return status;
1711 }
1712
1713 void
ieee80211_media_status(struct ifnet * ifp,struct ifmediareq * imr)1714 ieee80211_media_status(struct ifnet *ifp, struct ifmediareq *imr)
1715 {
1716 struct ieee80211vap *vap = ifp->if_softc;
1717 struct ieee80211com *ic = vap->iv_ic;
1718 enum ieee80211_phymode mode;
1719
1720 imr->ifm_status = IFM_AVALID;
1721 /*
1722 * NB: use the current channel's mode to lock down a xmit
1723 * rate only when running; otherwise we may have a mismatch
1724 * in which case the rate will not be convertible.
1725 */
1726 if (vap->iv_state == IEEE80211_S_RUN ||
1727 vap->iv_state == IEEE80211_S_SLEEP) {
1728 imr->ifm_status |= IFM_ACTIVE;
1729 mode = ieee80211_chan2mode(ic->ic_curchan);
1730 } else
1731 mode = IEEE80211_MODE_AUTO;
1732 imr->ifm_active = media_status(vap->iv_opmode, ic->ic_curchan);
1733 /*
1734 * Calculate a current rate if possible.
1735 */
1736 if (vap->iv_txparms[mode].ucastrate != IEEE80211_FIXED_RATE_NONE) {
1737 /*
1738 * A fixed rate is set, report that.
1739 */
1740 imr->ifm_active |= ieee80211_rate2media(ic,
1741 vap->iv_txparms[mode].ucastrate, mode);
1742 } else if (vap->iv_opmode == IEEE80211_M_STA) {
1743 /*
1744 * In station mode report the current transmit rate.
1745 */
1746 imr->ifm_active |= ieee80211_rate2media(ic,
1747 vap->iv_bss->ni_txrate, mode);
1748 } else
1749 imr->ifm_active |= IFM_AUTO;
1750 if (imr->ifm_status & IFM_ACTIVE)
1751 imr->ifm_current = imr->ifm_active;
1752 }
1753
1754 /*
1755 * Set the current phy mode and recalculate the active channel
1756 * set based on the available channels for this mode. Also
1757 * select a new default/current channel if the current one is
1758 * inappropriate for this mode.
1759 */
1760 int
ieee80211_setmode(struct ieee80211com * ic,enum ieee80211_phymode mode)1761 ieee80211_setmode(struct ieee80211com *ic, enum ieee80211_phymode mode)
1762 {
1763 /*
1764 * Adjust basic rates in 11b/11g supported rate set.
1765 * Note that if operating on a hal/quarter rate channel
1766 * this is a noop as those rates sets are different
1767 * and used instead.
1768 */
1769 if (mode == IEEE80211_MODE_11G || mode == IEEE80211_MODE_11B)
1770 ieee80211_setbasicrates(&ic->ic_sup_rates[mode], mode);
1771
1772 ic->ic_curmode = mode;
1773 ieee80211_reset_erp(ic); /* reset ERP state */
1774
1775 return 0;
1776 }
1777
1778 /*
1779 * Return the phy mode for with the specified channel.
1780 */
1781 enum ieee80211_phymode
ieee80211_chan2mode(const struct ieee80211_channel * chan)1782 ieee80211_chan2mode(const struct ieee80211_channel *chan)
1783 {
1784
1785 if (IEEE80211_IS_CHAN_HTA(chan))
1786 return IEEE80211_MODE_11NA;
1787 else if (IEEE80211_IS_CHAN_HTG(chan))
1788 return IEEE80211_MODE_11NG;
1789 else if (IEEE80211_IS_CHAN_108G(chan))
1790 return IEEE80211_MODE_TURBO_G;
1791 else if (IEEE80211_IS_CHAN_ST(chan))
1792 return IEEE80211_MODE_STURBO_A;
1793 else if (IEEE80211_IS_CHAN_TURBO(chan))
1794 return IEEE80211_MODE_TURBO_A;
1795 else if (IEEE80211_IS_CHAN_HALF(chan))
1796 return IEEE80211_MODE_HALF;
1797 else if (IEEE80211_IS_CHAN_QUARTER(chan))
1798 return IEEE80211_MODE_QUARTER;
1799 else if (IEEE80211_IS_CHAN_A(chan))
1800 return IEEE80211_MODE_11A;
1801 else if (IEEE80211_IS_CHAN_ANYG(chan))
1802 return IEEE80211_MODE_11G;
1803 else if (IEEE80211_IS_CHAN_B(chan))
1804 return IEEE80211_MODE_11B;
1805 else if (IEEE80211_IS_CHAN_FHSS(chan))
1806 return IEEE80211_MODE_FH;
1807
1808 /* NB: should not get here */
1809 printf("%s: cannot map channel to mode; freq %u flags 0x%x\n",
1810 __func__, chan->ic_freq, chan->ic_flags);
1811 return IEEE80211_MODE_11B;
1812 }
1813
1814 struct ratemedia {
1815 u_int match; /* rate + mode */
1816 u_int media; /* if_media rate */
1817 };
1818
1819 static int
findmedia(const struct ratemedia rates[],int n,u_int match)1820 findmedia(const struct ratemedia rates[], int n, u_int match)
1821 {
1822 int i;
1823
1824 for (i = 0; i < n; i++)
1825 if (rates[i].match == match)
1826 return rates[i].media;
1827 return IFM_AUTO;
1828 }
1829
1830 /*
1831 * Convert IEEE80211 rate value to ifmedia subtype.
1832 * Rate is either a legacy rate in units of 0.5Mbps
1833 * or an MCS index.
1834 */
1835 int
ieee80211_rate2media(struct ieee80211com * ic,int rate,enum ieee80211_phymode mode)1836 ieee80211_rate2media(struct ieee80211com *ic, int rate, enum ieee80211_phymode mode)
1837 {
1838 static const struct ratemedia rates[] = {
1839 { 2 | IFM_IEEE80211_FH, IFM_IEEE80211_FH1 },
1840 { 4 | IFM_IEEE80211_FH, IFM_IEEE80211_FH2 },
1841 { 2 | IFM_IEEE80211_11B, IFM_IEEE80211_DS1 },
1842 { 4 | IFM_IEEE80211_11B, IFM_IEEE80211_DS2 },
1843 { 11 | IFM_IEEE80211_11B, IFM_IEEE80211_DS5 },
1844 { 22 | IFM_IEEE80211_11B, IFM_IEEE80211_DS11 },
1845 { 44 | IFM_IEEE80211_11B, IFM_IEEE80211_DS22 },
1846 { 12 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM6 },
1847 { 18 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM9 },
1848 { 24 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM12 },
1849 { 36 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM18 },
1850 { 48 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM24 },
1851 { 72 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM36 },
1852 { 96 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM48 },
1853 { 108 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM54 },
1854 { 2 | IFM_IEEE80211_11G, IFM_IEEE80211_DS1 },
1855 { 4 | IFM_IEEE80211_11G, IFM_IEEE80211_DS2 },
1856 { 11 | IFM_IEEE80211_11G, IFM_IEEE80211_DS5 },
1857 { 22 | IFM_IEEE80211_11G, IFM_IEEE80211_DS11 },
1858 { 12 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM6 },
1859 { 18 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM9 },
1860 { 24 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM12 },
1861 { 36 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM18 },
1862 { 48 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM24 },
1863 { 72 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM36 },
1864 { 96 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM48 },
1865 { 108 | IFM_IEEE80211_11G, IFM_IEEE80211_OFDM54 },
1866 { 6 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM3 },
1867 { 9 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM4 },
1868 { 54 | IFM_IEEE80211_11A, IFM_IEEE80211_OFDM27 },
1869 /* NB: OFDM72 doesn't really exist so we don't handle it */
1870 };
1871 static const struct ratemedia htrates[] = {
1872 { 0, IFM_IEEE80211_MCS },
1873 { 1, IFM_IEEE80211_MCS },
1874 { 2, IFM_IEEE80211_MCS },
1875 { 3, IFM_IEEE80211_MCS },
1876 { 4, IFM_IEEE80211_MCS },
1877 { 5, IFM_IEEE80211_MCS },
1878 { 6, IFM_IEEE80211_MCS },
1879 { 7, IFM_IEEE80211_MCS },
1880 { 8, IFM_IEEE80211_MCS },
1881 { 9, IFM_IEEE80211_MCS },
1882 { 10, IFM_IEEE80211_MCS },
1883 { 11, IFM_IEEE80211_MCS },
1884 { 12, IFM_IEEE80211_MCS },
1885 { 13, IFM_IEEE80211_MCS },
1886 { 14, IFM_IEEE80211_MCS },
1887 { 15, IFM_IEEE80211_MCS },
1888 { 16, IFM_IEEE80211_MCS },
1889 { 17, IFM_IEEE80211_MCS },
1890 { 18, IFM_IEEE80211_MCS },
1891 { 19, IFM_IEEE80211_MCS },
1892 { 20, IFM_IEEE80211_MCS },
1893 { 21, IFM_IEEE80211_MCS },
1894 { 22, IFM_IEEE80211_MCS },
1895 { 23, IFM_IEEE80211_MCS },
1896 { 24, IFM_IEEE80211_MCS },
1897 { 25, IFM_IEEE80211_MCS },
1898 { 26, IFM_IEEE80211_MCS },
1899 { 27, IFM_IEEE80211_MCS },
1900 { 28, IFM_IEEE80211_MCS },
1901 { 29, IFM_IEEE80211_MCS },
1902 { 30, IFM_IEEE80211_MCS },
1903 { 31, IFM_IEEE80211_MCS },
1904 { 32, IFM_IEEE80211_MCS },
1905 { 33, IFM_IEEE80211_MCS },
1906 { 34, IFM_IEEE80211_MCS },
1907 { 35, IFM_IEEE80211_MCS },
1908 { 36, IFM_IEEE80211_MCS },
1909 { 37, IFM_IEEE80211_MCS },
1910 { 38, IFM_IEEE80211_MCS },
1911 { 39, IFM_IEEE80211_MCS },
1912 { 40, IFM_IEEE80211_MCS },
1913 { 41, IFM_IEEE80211_MCS },
1914 { 42, IFM_IEEE80211_MCS },
1915 { 43, IFM_IEEE80211_MCS },
1916 { 44, IFM_IEEE80211_MCS },
1917 { 45, IFM_IEEE80211_MCS },
1918 { 46, IFM_IEEE80211_MCS },
1919 { 47, IFM_IEEE80211_MCS },
1920 { 48, IFM_IEEE80211_MCS },
1921 { 49, IFM_IEEE80211_MCS },
1922 { 50, IFM_IEEE80211_MCS },
1923 { 51, IFM_IEEE80211_MCS },
1924 { 52, IFM_IEEE80211_MCS },
1925 { 53, IFM_IEEE80211_MCS },
1926 { 54, IFM_IEEE80211_MCS },
1927 { 55, IFM_IEEE80211_MCS },
1928 { 56, IFM_IEEE80211_MCS },
1929 { 57, IFM_IEEE80211_MCS },
1930 { 58, IFM_IEEE80211_MCS },
1931 { 59, IFM_IEEE80211_MCS },
1932 { 60, IFM_IEEE80211_MCS },
1933 { 61, IFM_IEEE80211_MCS },
1934 { 62, IFM_IEEE80211_MCS },
1935 { 63, IFM_IEEE80211_MCS },
1936 { 64, IFM_IEEE80211_MCS },
1937 { 65, IFM_IEEE80211_MCS },
1938 { 66, IFM_IEEE80211_MCS },
1939 { 67, IFM_IEEE80211_MCS },
1940 { 68, IFM_IEEE80211_MCS },
1941 { 69, IFM_IEEE80211_MCS },
1942 { 70, IFM_IEEE80211_MCS },
1943 { 71, IFM_IEEE80211_MCS },
1944 { 72, IFM_IEEE80211_MCS },
1945 { 73, IFM_IEEE80211_MCS },
1946 { 74, IFM_IEEE80211_MCS },
1947 { 75, IFM_IEEE80211_MCS },
1948 { 76, IFM_IEEE80211_MCS },
1949 };
1950 int m;
1951
1952 /*
1953 * Check 11n rates first for match as an MCS.
1954 */
1955 if (mode == IEEE80211_MODE_11NA) {
1956 if (rate & IEEE80211_RATE_MCS) {
1957 rate &= ~IEEE80211_RATE_MCS;
1958 m = findmedia(htrates, nitems(htrates), rate);
1959 if (m != IFM_AUTO)
1960 return m | IFM_IEEE80211_11NA;
1961 }
1962 } else if (mode == IEEE80211_MODE_11NG) {
1963 /* NB: 12 is ambiguous, it will be treated as an MCS */
1964 if (rate & IEEE80211_RATE_MCS) {
1965 rate &= ~IEEE80211_RATE_MCS;
1966 m = findmedia(htrates, nitems(htrates), rate);
1967 if (m != IFM_AUTO)
1968 return m | IFM_IEEE80211_11NG;
1969 }
1970 }
1971 rate &= IEEE80211_RATE_VAL;
1972 switch (mode) {
1973 case IEEE80211_MODE_11A:
1974 case IEEE80211_MODE_HALF: /* XXX good 'nuf */
1975 case IEEE80211_MODE_QUARTER:
1976 case IEEE80211_MODE_11NA:
1977 case IEEE80211_MODE_TURBO_A:
1978 case IEEE80211_MODE_STURBO_A:
1979 return findmedia(rates, nitems(rates),
1980 rate | IFM_IEEE80211_11A);
1981 case IEEE80211_MODE_11B:
1982 return findmedia(rates, nitems(rates),
1983 rate | IFM_IEEE80211_11B);
1984 case IEEE80211_MODE_FH:
1985 return findmedia(rates, nitems(rates),
1986 rate | IFM_IEEE80211_FH);
1987 case IEEE80211_MODE_AUTO:
1988 /* NB: ic may be NULL for some drivers */
1989 if (ic != NULL && ic->ic_phytype == IEEE80211_T_FH)
1990 return findmedia(rates, nitems(rates),
1991 rate | IFM_IEEE80211_FH);
1992 /* NB: hack, 11g matches both 11b+11a rates */
1993 /* fall thru... */
1994 case IEEE80211_MODE_11G:
1995 case IEEE80211_MODE_11NG:
1996 case IEEE80211_MODE_TURBO_G:
1997 return findmedia(rates, nitems(rates), rate | IFM_IEEE80211_11G);
1998 }
1999 return IFM_AUTO;
2000 }
2001
2002 int
ieee80211_media2rate(int mword)2003 ieee80211_media2rate(int mword)
2004 {
2005 static const int ieeerates[] = {
2006 -1, /* IFM_AUTO */
2007 0, /* IFM_MANUAL */
2008 0, /* IFM_NONE */
2009 2, /* IFM_IEEE80211_FH1 */
2010 4, /* IFM_IEEE80211_FH2 */
2011 2, /* IFM_IEEE80211_DS1 */
2012 4, /* IFM_IEEE80211_DS2 */
2013 11, /* IFM_IEEE80211_DS5 */
2014 22, /* IFM_IEEE80211_DS11 */
2015 44, /* IFM_IEEE80211_DS22 */
2016 12, /* IFM_IEEE80211_OFDM6 */
2017 18, /* IFM_IEEE80211_OFDM9 */
2018 24, /* IFM_IEEE80211_OFDM12 */
2019 36, /* IFM_IEEE80211_OFDM18 */
2020 48, /* IFM_IEEE80211_OFDM24 */
2021 72, /* IFM_IEEE80211_OFDM36 */
2022 96, /* IFM_IEEE80211_OFDM48 */
2023 108, /* IFM_IEEE80211_OFDM54 */
2024 144, /* IFM_IEEE80211_OFDM72 */
2025 0, /* IFM_IEEE80211_DS354k */
2026 0, /* IFM_IEEE80211_DS512k */
2027 6, /* IFM_IEEE80211_OFDM3 */
2028 9, /* IFM_IEEE80211_OFDM4 */
2029 54, /* IFM_IEEE80211_OFDM27 */
2030 -1, /* IFM_IEEE80211_MCS */
2031 };
2032 return IFM_SUBTYPE(mword) < nitems(ieeerates) ?
2033 ieeerates[IFM_SUBTYPE(mword)] : 0;
2034 }
2035
2036 /*
2037 * The following hash function is adapted from "Hash Functions" by Bob Jenkins
2038 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997).
2039 */
2040 #define mix(a, b, c) \
2041 do { \
2042 a -= b; a -= c; a ^= (c >> 13); \
2043 b -= c; b -= a; b ^= (a << 8); \
2044 c -= a; c -= b; c ^= (b >> 13); \
2045 a -= b; a -= c; a ^= (c >> 12); \
2046 b -= c; b -= a; b ^= (a << 16); \
2047 c -= a; c -= b; c ^= (b >> 5); \
2048 a -= b; a -= c; a ^= (c >> 3); \
2049 b -= c; b -= a; b ^= (a << 10); \
2050 c -= a; c -= b; c ^= (b >> 15); \
2051 } while (/*CONSTCOND*/0)
2052
2053 uint32_t
ieee80211_mac_hash(const struct ieee80211com * ic,const uint8_t addr[IEEE80211_ADDR_LEN])2054 ieee80211_mac_hash(const struct ieee80211com *ic,
2055 const uint8_t addr[IEEE80211_ADDR_LEN])
2056 {
2057 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = ic->ic_hash_key;
2058
2059 b += addr[5] << 8;
2060 b += addr[4];
2061 a += addr[3] << 24;
2062 a += addr[2] << 16;
2063 a += addr[1] << 8;
2064 a += addr[0];
2065
2066 mix(a, b, c);
2067
2068 return c;
2069 }
2070 #undef mix
2071
2072 char
ieee80211_channel_type_char(const struct ieee80211_channel * c)2073 ieee80211_channel_type_char(const struct ieee80211_channel *c)
2074 {
2075 if (IEEE80211_IS_CHAN_ST(c))
2076 return 'S';
2077 if (IEEE80211_IS_CHAN_108A(c))
2078 return 'T';
2079 if (IEEE80211_IS_CHAN_108G(c))
2080 return 'G';
2081 if (IEEE80211_IS_CHAN_HT(c))
2082 return 'n';
2083 if (IEEE80211_IS_CHAN_A(c))
2084 return 'a';
2085 if (IEEE80211_IS_CHAN_ANYG(c))
2086 return 'g';
2087 if (IEEE80211_IS_CHAN_B(c))
2088 return 'b';
2089 return 'f';
2090 }
2091