1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include <sys/cdefs.h>
29 #ifdef __FreeBSD__
30 __FBSDID("$FreeBSD: releng/12.0/sys/net80211/ieee80211_ht.c 327231 2017-12-27 03:23:21Z eadler $");
31 #endif
32
33 /*
34 * IEEE 802.11n protocol support.
35 */
36
37 #include "opt_inet.h"
38 #include "opt_wlan.h"
39
40 #include <sys/param.h>
41 #include <sys/kernel.h>
42 #include <sys/malloc.h>
43 #include <sys/systm.h>
44 #include <sys/endian.h>
45
46 #include <sys/socket.h>
47
48 #include <net/if.h>
49 #include <net/if_var.h>
50 #include <net/if_media.h>
51 #include <net/ethernet.h>
52
53 #include <net80211/ieee80211_var.h>
54 #include <net80211/ieee80211_action.h>
55 #include <net80211/ieee80211_input.h>
56
57 /* define here, used throughout file */
58 #define MS(_v, _f) (((_v) & _f) >> _f##_S)
59 #define SM(_v, _f) (((_v) << _f##_S) & _f)
60
61 const struct ieee80211_mcs_rates ieee80211_htrates[IEEE80211_HTRATE_MAXSIZE] = {
62 { 13, 14, 27, 30 }, /* MCS 0 */
63 { 26, 29, 54, 60 }, /* MCS 1 */
64 { 39, 43, 81, 90 }, /* MCS 2 */
65 { 52, 58, 108, 120 }, /* MCS 3 */
66 { 78, 87, 162, 180 }, /* MCS 4 */
67 { 104, 116, 216, 240 }, /* MCS 5 */
68 { 117, 130, 243, 270 }, /* MCS 6 */
69 { 130, 144, 270, 300 }, /* MCS 7 */
70 { 26, 29, 54, 60 }, /* MCS 8 */
71 { 52, 58, 108, 120 }, /* MCS 9 */
72 { 78, 87, 162, 180 }, /* MCS 10 */
73 { 104, 116, 216, 240 }, /* MCS 11 */
74 { 156, 173, 324, 360 }, /* MCS 12 */
75 { 208, 231, 432, 480 }, /* MCS 13 */
76 { 234, 260, 486, 540 }, /* MCS 14 */
77 { 260, 289, 540, 600 }, /* MCS 15 */
78 { 39, 43, 81, 90 }, /* MCS 16 */
79 { 78, 87, 162, 180 }, /* MCS 17 */
80 { 117, 130, 243, 270 }, /* MCS 18 */
81 { 156, 173, 324, 360 }, /* MCS 19 */
82 { 234, 260, 486, 540 }, /* MCS 20 */
83 { 312, 347, 648, 720 }, /* MCS 21 */
84 { 351, 390, 729, 810 }, /* MCS 22 */
85 { 390, 433, 810, 900 }, /* MCS 23 */
86 { 52, 58, 108, 120 }, /* MCS 24 */
87 { 104, 116, 216, 240 }, /* MCS 25 */
88 { 156, 173, 324, 360 }, /* MCS 26 */
89 { 208, 231, 432, 480 }, /* MCS 27 */
90 { 312, 347, 648, 720 }, /* MCS 28 */
91 { 416, 462, 864, 960 }, /* MCS 29 */
92 { 468, 520, 972, 1080 }, /* MCS 30 */
93 { 520, 578, 1080, 1200 }, /* MCS 31 */
94 { 0, 0, 12, 13 }, /* MCS 32 */
95 { 78, 87, 162, 180 }, /* MCS 33 */
96 { 104, 116, 216, 240 }, /* MCS 34 */
97 { 130, 144, 270, 300 }, /* MCS 35 */
98 { 117, 130, 243, 270 }, /* MCS 36 */
99 { 156, 173, 324, 360 }, /* MCS 37 */
100 { 195, 217, 405, 450 }, /* MCS 38 */
101 { 104, 116, 216, 240 }, /* MCS 39 */
102 { 130, 144, 270, 300 }, /* MCS 40 */
103 { 130, 144, 270, 300 }, /* MCS 41 */
104 { 156, 173, 324, 360 }, /* MCS 42 */
105 { 182, 202, 378, 420 }, /* MCS 43 */
106 { 182, 202, 378, 420 }, /* MCS 44 */
107 { 208, 231, 432, 480 }, /* MCS 45 */
108 { 156, 173, 324, 360 }, /* MCS 46 */
109 { 195, 217, 405, 450 }, /* MCS 47 */
110 { 195, 217, 405, 450 }, /* MCS 48 */
111 { 234, 260, 486, 540 }, /* MCS 49 */
112 { 273, 303, 567, 630 }, /* MCS 50 */
113 { 273, 303, 567, 630 }, /* MCS 51 */
114 { 312, 347, 648, 720 }, /* MCS 52 */
115 { 130, 144, 270, 300 }, /* MCS 53 */
116 { 156, 173, 324, 360 }, /* MCS 54 */
117 { 182, 202, 378, 420 }, /* MCS 55 */
118 { 156, 173, 324, 360 }, /* MCS 56 */
119 { 182, 202, 378, 420 }, /* MCS 57 */
120 { 208, 231, 432, 480 }, /* MCS 58 */
121 { 234, 260, 486, 540 }, /* MCS 59 */
122 { 208, 231, 432, 480 }, /* MCS 60 */
123 { 234, 260, 486, 540 }, /* MCS 61 */
124 { 260, 289, 540, 600 }, /* MCS 62 */
125 { 260, 289, 540, 600 }, /* MCS 63 */
126 { 286, 318, 594, 660 }, /* MCS 64 */
127 { 195, 217, 405, 450 }, /* MCS 65 */
128 { 234, 260, 486, 540 }, /* MCS 66 */
129 { 273, 303, 567, 630 }, /* MCS 67 */
130 { 234, 260, 486, 540 }, /* MCS 68 */
131 { 273, 303, 567, 630 }, /* MCS 69 */
132 { 312, 347, 648, 720 }, /* MCS 70 */
133 { 351, 390, 729, 810 }, /* MCS 71 */
134 { 312, 347, 648, 720 }, /* MCS 72 */
135 { 351, 390, 729, 810 }, /* MCS 73 */
136 { 390, 433, 810, 900 }, /* MCS 74 */
137 { 390, 433, 810, 900 }, /* MCS 75 */
138 { 429, 477, 891, 990 }, /* MCS 76 */
139 };
140
141 static int ieee80211_ampdu_age = -1; /* threshold for ampdu reorder q (ms) */
142 SYSCTL_PROC(_net_wlan, OID_AUTO, ampdu_age, CTLTYPE_INT | CTLFLAG_RW,
143 &ieee80211_ampdu_age, 0, ieee80211_sysctl_msecs_ticks, "I",
144 "AMPDU max reorder age (ms)");
145
146 static int ieee80211_recv_bar_ena = 1;
147 SYSCTL_INT(_net_wlan, OID_AUTO, recv_bar, CTLFLAG_RW, &ieee80211_recv_bar_ena,
148 0, "BAR frame processing (ena/dis)");
149
150 static int ieee80211_addba_timeout = -1;/* timeout for ADDBA response */
151 SYSCTL_PROC(_net_wlan, OID_AUTO, addba_timeout, CTLTYPE_INT | CTLFLAG_RW,
152 &ieee80211_addba_timeout, 0, ieee80211_sysctl_msecs_ticks, "I",
153 "ADDBA request timeout (ms)");
154 static int ieee80211_addba_backoff = -1;/* backoff after max ADDBA requests */
155 SYSCTL_PROC(_net_wlan, OID_AUTO, addba_backoff, CTLTYPE_INT | CTLFLAG_RW,
156 &ieee80211_addba_backoff, 0, ieee80211_sysctl_msecs_ticks, "I",
157 "ADDBA request backoff (ms)");
158 static int ieee80211_addba_maxtries = 3;/* max ADDBA requests before backoff */
159 SYSCTL_INT(_net_wlan, OID_AUTO, addba_maxtries, CTLFLAG_RW,
160 &ieee80211_addba_maxtries, 0, "max ADDBA requests sent before backoff");
161
162 static int ieee80211_bar_timeout = -1; /* timeout waiting for BAR response */
163 static int ieee80211_bar_maxtries = 50;/* max BAR requests before DELBA */
164
165 static ieee80211_recv_action_func ht_recv_action_ba_addba_request;
166 static ieee80211_recv_action_func ht_recv_action_ba_addba_response;
167 static ieee80211_recv_action_func ht_recv_action_ba_delba;
168 static ieee80211_recv_action_func ht_recv_action_ht_mimopwrsave;
169 static ieee80211_recv_action_func ht_recv_action_ht_txchwidth;
170
171 static ieee80211_send_action_func ht_send_action_ba_addba;
172 static ieee80211_send_action_func ht_send_action_ba_delba;
173 static ieee80211_send_action_func ht_send_action_ht_txchwidth;
174
175 static void
176 ieee80211_ht_init(void)
177 {
178 /*
179 * Setup HT parameters that depends on the clock frequency.
180 */
181 ieee80211_ampdu_age = msecs_to_ticks(500);
182 ieee80211_addba_timeout = msecs_to_ticks(250);
183 ieee80211_addba_backoff = msecs_to_ticks(10*1000);
184 ieee80211_bar_timeout = msecs_to_ticks(250);
185 /*
186 * Register action frame handlers.
187 */
188 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA,
189 IEEE80211_ACTION_BA_ADDBA_REQUEST, ht_recv_action_ba_addba_request);
190 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA,
191 IEEE80211_ACTION_BA_ADDBA_RESPONSE, ht_recv_action_ba_addba_response);
192 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA,
193 IEEE80211_ACTION_BA_DELBA, ht_recv_action_ba_delba);
194 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_HT,
195 IEEE80211_ACTION_HT_MIMOPWRSAVE, ht_recv_action_ht_mimopwrsave);
196 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_HT,
197 IEEE80211_ACTION_HT_TXCHWIDTH, ht_recv_action_ht_txchwidth);
198
199 ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA,
200 IEEE80211_ACTION_BA_ADDBA_REQUEST, ht_send_action_ba_addba);
201 ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA,
202 IEEE80211_ACTION_BA_ADDBA_RESPONSE, ht_send_action_ba_addba);
203 ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA,
204 IEEE80211_ACTION_BA_DELBA, ht_send_action_ba_delba);
205 ieee80211_send_action_register(IEEE80211_ACTION_CAT_HT,
206 IEEE80211_ACTION_HT_TXCHWIDTH, ht_send_action_ht_txchwidth);
207 }
208 SYSINIT(wlan_ht, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_ht_init, NULL);
209
210 static int ieee80211_ampdu_enable(struct ieee80211_node *ni,
211 struct ieee80211_tx_ampdu *tap);
212 static int ieee80211_addba_request(struct ieee80211_node *ni,
213 struct ieee80211_tx_ampdu *tap,
214 int dialogtoken, int baparamset, int batimeout);
215 static int ieee80211_addba_response(struct ieee80211_node *ni,
216 struct ieee80211_tx_ampdu *tap,
217 int code, int baparamset, int batimeout);
218 static void ieee80211_addba_stop(struct ieee80211_node *ni,
219 struct ieee80211_tx_ampdu *tap);
220 static void null_addba_response_timeout(struct ieee80211_node *ni,
221 struct ieee80211_tx_ampdu *tap);
222
223 static void ieee80211_bar_response(struct ieee80211_node *ni,
224 struct ieee80211_tx_ampdu *tap, int status);
225 static void ampdu_tx_stop(struct ieee80211_tx_ampdu *tap);
226 static void bar_stop_timer(struct ieee80211_tx_ampdu *tap);
227 static int ampdu_rx_start(struct ieee80211_node *, struct ieee80211_rx_ampdu *,
228 int baparamset, int batimeout, int baseqctl);
229 static void ampdu_rx_stop(struct ieee80211_node *, struct ieee80211_rx_ampdu *);
230
231 void
232 ieee80211_ht_attach(struct ieee80211com *ic)
233 {
234 /* setup default aggregation policy */
235 ic->ic_recv_action = ieee80211_recv_action;
236 ic->ic_send_action = ieee80211_send_action;
237 ic->ic_ampdu_enable = ieee80211_ampdu_enable;
238 ic->ic_addba_request = ieee80211_addba_request;
239 ic->ic_addba_response = ieee80211_addba_response;
240 ic->ic_addba_response_timeout = null_addba_response_timeout;
241 ic->ic_addba_stop = ieee80211_addba_stop;
242 ic->ic_bar_response = ieee80211_bar_response;
243 ic->ic_ampdu_rx_start = ampdu_rx_start;
244 ic->ic_ampdu_rx_stop = ampdu_rx_stop;
245
246 ic->ic_htprotmode = IEEE80211_PROT_RTSCTS;
247 ic->ic_curhtprotmode = IEEE80211_HTINFO_OPMODE_PURE;
248 }
249
250 void
251 ieee80211_ht_detach(struct ieee80211com *ic)
252 {
253 }
254
255 void
256 ieee80211_ht_vattach(struct ieee80211vap *vap)
257 {
258
259 /* driver can override defaults */
260 vap->iv_ampdu_rxmax = IEEE80211_HTCAP_MAXRXAMPDU_8K;
261 vap->iv_ampdu_density = IEEE80211_HTCAP_MPDUDENSITY_NA;
262 vap->iv_ampdu_limit = vap->iv_ampdu_rxmax;
263 vap->iv_amsdu_limit = vap->iv_htcaps & IEEE80211_HTCAP_MAXAMSDU;
264 /* tx aggregation traffic thresholds */
265 vap->iv_ampdu_mintraffic[WME_AC_BK] = 128;
266 vap->iv_ampdu_mintraffic[WME_AC_BE] = 64;
267 vap->iv_ampdu_mintraffic[WME_AC_VO] = 32;
268 vap->iv_ampdu_mintraffic[WME_AC_VI] = 32;
269
270 if (vap->iv_htcaps & IEEE80211_HTC_HT) {
271 /*
272 * Device is HT capable; enable all HT-related
273 * facilities by default.
274 * XXX these choices may be too aggressive.
275 */
276 vap->iv_flags_ht |= IEEE80211_FHT_HT
277 | IEEE80211_FHT_HTCOMPAT
278 ;
279 if (vap->iv_htcaps & IEEE80211_HTCAP_SHORTGI20)
280 vap->iv_flags_ht |= IEEE80211_FHT_SHORTGI20;
281 /* XXX infer from channel list? */
282 if (vap->iv_htcaps & IEEE80211_HTCAP_CHWIDTH40) {
283 vap->iv_flags_ht |= IEEE80211_FHT_USEHT40;
284 if (vap->iv_htcaps & IEEE80211_HTCAP_SHORTGI40)
285 vap->iv_flags_ht |= IEEE80211_FHT_SHORTGI40;
286 }
287 /* enable RIFS if capable */
288 if (vap->iv_htcaps & IEEE80211_HTC_RIFS)
289 vap->iv_flags_ht |= IEEE80211_FHT_RIFS;
290
291 /* NB: A-MPDU and A-MSDU rx are mandated, these are tx only */
292 vap->iv_flags_ht |= IEEE80211_FHT_AMPDU_RX;
293 if (vap->iv_htcaps & IEEE80211_HTC_AMPDU)
294 vap->iv_flags_ht |= IEEE80211_FHT_AMPDU_TX;
295 vap->iv_flags_ht |= IEEE80211_FHT_AMSDU_RX;
296 if (vap->iv_htcaps & IEEE80211_HTC_AMSDU)
297 vap->iv_flags_ht |= IEEE80211_FHT_AMSDU_TX;
298
299 if (vap->iv_htcaps & IEEE80211_HTCAP_TXSTBC)
300 vap->iv_flags_ht |= IEEE80211_FHT_STBC_TX;
301 if (vap->iv_htcaps & IEEE80211_HTCAP_RXSTBC)
302 vap->iv_flags_ht |= IEEE80211_FHT_STBC_RX;
303
304 if (vap->iv_htcaps & IEEE80211_HTCAP_LDPC)
305 vap->iv_flags_ht |= IEEE80211_FHT_LDPC_RX;
306 if (vap->iv_htcaps & IEEE80211_HTC_TXLDPC)
307 vap->iv_flags_ht |= IEEE80211_FHT_LDPC_TX;
308 }
309 /* NB: disable default legacy WDS, too many issues right now */
310 if (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY)
311 vap->iv_flags_ht &= ~IEEE80211_FHT_HT;
312 }
313
314 void
315 ieee80211_ht_vdetach(struct ieee80211vap *vap)
316 {
317 }
318
319 static int
320 ht_getrate(struct ieee80211com *ic, int index, enum ieee80211_phymode mode,
321 int ratetype)
322 {
323 int mword, rate;
324
325 mword = ieee80211_rate2media(ic, index | IEEE80211_RATE_MCS, mode);
326 if (IFM_SUBTYPE(mword) != IFM_IEEE80211_MCS)
327 return (0);
328 switch (ratetype) {
329 case 0:
330 rate = ieee80211_htrates[index].ht20_rate_800ns;
331 break;
332 case 1:
333 rate = ieee80211_htrates[index].ht20_rate_400ns;
334 break;
335 case 2:
336 rate = ieee80211_htrates[index].ht40_rate_800ns;
337 break;
338 default:
339 rate = ieee80211_htrates[index].ht40_rate_400ns;
340 break;
341 }
342 return (rate);
343 }
344
345 static struct printranges {
346 int minmcs;
347 int maxmcs;
348 int txstream;
349 int ratetype;
350 int htcapflags;
351 } ranges[] = {
352 { 0, 7, 1, 0, 0 },
353 { 8, 15, 2, 0, 0 },
354 { 16, 23, 3, 0, 0 },
355 { 24, 31, 4, 0, 0 },
356 { 32, 0, 1, 2, IEEE80211_HTC_TXMCS32 },
357 { 33, 38, 2, 0, IEEE80211_HTC_TXUNEQUAL },
358 { 39, 52, 3, 0, IEEE80211_HTC_TXUNEQUAL },
359 { 53, 76, 4, 0, IEEE80211_HTC_TXUNEQUAL },
360 { 0, 0, 0, 0, 0 },
361 };
362
363 static void
364 ht_rateprint(struct ieee80211com *ic, enum ieee80211_phymode mode, int ratetype)
365 {
366 int minrate, maxrate;
367 struct printranges *range;
368
369 for (range = ranges; range->txstream != 0; range++) {
370 if (ic->ic_txstream < range->txstream)
371 continue;
372 if (range->htcapflags &&
373 (ic->ic_htcaps & range->htcapflags) == 0)
374 continue;
375 if (ratetype < range->ratetype)
376 continue;
377 minrate = ht_getrate(ic, range->minmcs, mode, ratetype);
378 maxrate = ht_getrate(ic, range->maxmcs, mode, ratetype);
379 if (range->maxmcs) {
380 ic_printf(ic, "MCS %d-%d: %d%sMbps - %d%sMbps\n",
381 range->minmcs, range->maxmcs,
382 minrate/2, ((minrate & 0x1) != 0 ? ".5" : ""),
383 maxrate/2, ((maxrate & 0x1) != 0 ? ".5" : ""));
384 } else {
385 ic_printf(ic, "MCS %d: %d%sMbps\n", range->minmcs,
386 minrate/2, ((minrate & 0x1) != 0 ? ".5" : ""));
387 }
388 }
389 }
390
391 static void
392 ht_announce(struct ieee80211com *ic, enum ieee80211_phymode mode)
393 {
394 const char *modestr = ieee80211_phymode_name[mode];
395
396 ic_printf(ic, "%s MCS 20MHz\n", modestr);
397 ht_rateprint(ic, mode, 0);
398 if (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20) {
399 ic_printf(ic, "%s MCS 20MHz SGI\n", modestr);
400 ht_rateprint(ic, mode, 1);
401 }
402 if (ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) {
403 ic_printf(ic, "%s MCS 40MHz:\n", modestr);
404 ht_rateprint(ic, mode, 2);
405 }
406 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) &&
407 (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40)) {
408 ic_printf(ic, "%s MCS 40MHz SGI:\n", modestr);
409 ht_rateprint(ic, mode, 3);
410 }
411 }
412
413 void
414 ieee80211_ht_announce(struct ieee80211com *ic)
415 {
416
417 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) ||
418 isset(ic->ic_modecaps, IEEE80211_MODE_11NG))
419 ic_printf(ic, "%dT%dR\n", ic->ic_txstream, ic->ic_rxstream);
420 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA))
421 ht_announce(ic, IEEE80211_MODE_11NA);
422 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NG))
423 ht_announce(ic, IEEE80211_MODE_11NG);
424 }
425
426 void
427 ieee80211_init_suphtrates(struct ieee80211com *ic)
428 {
429 #define ADDRATE(x) do { \
430 htrateset->rs_rates[htrateset->rs_nrates] = x; \
431 htrateset->rs_nrates++; \
432 } while (0)
433 struct ieee80211_htrateset *htrateset = &ic->ic_sup_htrates;
434 int i;
435
436 memset(htrateset, 0, sizeof(struct ieee80211_htrateset));
437 for (i = 0; i < ic->ic_txstream * 8; i++)
438 ADDRATE(i);
439 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) &&
440 (ic->ic_htcaps & IEEE80211_HTC_TXMCS32))
441 ADDRATE(32);
442 if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL) {
443 if (ic->ic_txstream >= 2) {
444 for (i = 33; i <= 38; i++)
445 ADDRATE(i);
446 }
447 if (ic->ic_txstream >= 3) {
448 for (i = 39; i <= 52; i++)
449 ADDRATE(i);
450 }
451 if (ic->ic_txstream == 4) {
452 for (i = 53; i <= 76; i++)
453 ADDRATE(i);
454 }
455 }
456 #undef ADDRATE
457 }
458
459 /*
460 * Receive processing.
461 */
462
463 /*
464 * Decap the encapsulated A-MSDU frames and dispatch all but
465 * the last for delivery. The last frame is returned for
466 * delivery via the normal path.
467 */
468 struct mbuf *
469 ieee80211_decap_amsdu(struct ieee80211_node *ni, struct mbuf *m)
470 {
471 struct ieee80211vap *vap = ni->ni_vap;
472 int framelen;
473 struct mbuf *n;
474
475 /* discard 802.3 header inserted by ieee80211_decap */
476 m_adj(m, sizeof(struct ether_header));
477
478 vap->iv_stats.is_amsdu_decap++;
479
480 for (;;) {
481 /*
482 * Decap the first frame, bust it apart from the
483 * remainder and deliver. We leave the last frame
484 * delivery to the caller (for consistency with other
485 * code paths, could also do it here).
486 */
487 m = ieee80211_decap1(m, &framelen);
488 if (m == NULL) {
489 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
490 ni->ni_macaddr, "a-msdu", "%s", "decap failed");
491 vap->iv_stats.is_amsdu_tooshort++;
492 return NULL;
493 }
494 if (m->m_pkthdr.len == framelen)
495 break;
496 n = m_split(m, framelen, M_NOWAIT);
497 if (n == NULL) {
498 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
499 ni->ni_macaddr, "a-msdu",
500 "%s", "unable to split encapsulated frames");
501 vap->iv_stats.is_amsdu_split++;
502 m_freem(m); /* NB: must reclaim */
503 return NULL;
504 }
505 vap->iv_deliver_data(vap, ni, m);
506
507 /*
508 * Remove frame contents; each intermediate frame
509 * is required to be aligned to a 4-byte boundary.
510 */
511 m = n;
512 m_adj(m, roundup2(framelen, 4) - framelen); /* padding */
513 }
514 return m; /* last delivered by caller */
515 }
516
517 /*
518 * Add the given frame to the current RX reorder slot.
519 *
520 * For future offloaded A-MSDU handling where multiple frames with
521 * the same sequence number show up here, this routine will append
522 * those frames as long as they're appropriately tagged.
523 */
524 static int
525 ampdu_rx_add_slot(struct ieee80211_rx_ampdu *rap, int off, int tid,
526 ieee80211_seq rxseq,
527 struct ieee80211_node *ni,
528 struct mbuf *m)
529 {
530 struct ieee80211vap *vap = ni->ni_vap;
531
532 if (rap->rxa_m[off] == NULL) {
533 rap->rxa_m[off] = m;
534 rap->rxa_qframes++;
535 rap->rxa_qbytes += m->m_pkthdr.len;
536 vap->iv_stats.is_ampdu_rx_reorder++;
537 return (0);
538 } else {
539 IEEE80211_DISCARD_MAC(vap,
540 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N,
541 ni->ni_macaddr, "a-mpdu duplicate",
542 "seqno %u tid %u BA win <%u:%u>",
543 rxseq, tid, rap->rxa_start,
544 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1));
545 vap->iv_stats.is_rx_dup++;
546 IEEE80211_NODE_STAT(ni, rx_dup);
547 m_freem(m);
548 return (-1);
549 }
550 }
551
552 static void
553 ampdu_rx_purge_slot(struct ieee80211_rx_ampdu *rap, int i)
554 {
555 struct mbuf *m;
556
557 m = rap->rxa_m[i];
558 if (m == NULL)
559 return;
560
561 rap->rxa_m[i] = NULL;
562 rap->rxa_qbytes -= m->m_pkthdr.len;
563 rap->rxa_qframes--;
564 m_freem(m);
565 }
566
567 /*
568 * Purge all frames in the A-MPDU re-order queue.
569 */
570 static void
571 ampdu_rx_purge(struct ieee80211_rx_ampdu *rap)
572 {
573 int i;
574
575 for (i = 0; i < rap->rxa_wnd; i++) {
576 ampdu_rx_purge_slot(rap, i);
577 if (rap->rxa_qframes == 0)
578 break;
579 }
580 KASSERT(rap->rxa_qbytes == 0 && rap->rxa_qframes == 0,
581 ("lost %u data, %u frames on ampdu rx q",
582 rap->rxa_qbytes, rap->rxa_qframes));
583 }
584
585 /*
586 * Start A-MPDU rx/re-order processing for the specified TID.
587 */
588 static int
589 ampdu_rx_start(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap,
590 int baparamset, int batimeout, int baseqctl)
591 {
592 int bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ);
593
594 if (rap->rxa_flags & IEEE80211_AGGR_RUNNING) {
595 /*
596 * AMPDU previously setup and not terminated with a DELBA,
597 * flush the reorder q's in case anything remains.
598 */
599 ampdu_rx_purge(rap);
600 }
601 memset(rap, 0, sizeof(*rap));
602 rap->rxa_wnd = (bufsiz == 0) ?
603 IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX);
604 rap->rxa_start = MS(baseqctl, IEEE80211_BASEQ_START);
605 rap->rxa_flags |= IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_XCHGPEND;
606
607 return 0;
608 }
609
610 /*
611 * Public function; manually setup the RX ampdu state.
612 */
613 int
614 ieee80211_ampdu_rx_start_ext(struct ieee80211_node *ni, int tid, int seq, int baw)
615 {
616 struct ieee80211_rx_ampdu *rap;
617
618 /* XXX TODO: sanity check tid, seq, baw */
619
620 rap = &ni->ni_rx_ampdu[tid];
621
622 if (rap->rxa_flags & IEEE80211_AGGR_RUNNING) {
623 /*
624 * AMPDU previously setup and not terminated with a DELBA,
625 * flush the reorder q's in case anything remains.
626 */
627 ampdu_rx_purge(rap);
628 }
629
630 memset(rap, 0, sizeof(*rap));
631 rap->rxa_wnd = (baw== 0) ?
632 IEEE80211_AGGR_BAWMAX : min(baw, IEEE80211_AGGR_BAWMAX);
633 if (seq == -1) {
634 /* Wait for the first RX frame, use that as BAW */
635 rap->rxa_start = 0;
636 rap->rxa_flags |= IEEE80211_AGGR_WAITRX;
637 } else {
638 rap->rxa_start = seq;
639 }
640 rap->rxa_flags |= IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_XCHGPEND;
641
642 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, ni,
643 "%s: tid=%d, start=%d, wnd=%d, flags=0x%08x",
644 __func__,
645 tid,
646 seq,
647 rap->rxa_wnd,
648 rap->rxa_flags);
649
650 return 0;
651 }
652
653 /*
654 * Public function; manually stop the RX AMPDU state.
655 */
656 void
657 ieee80211_ampdu_rx_stop_ext(struct ieee80211_node *ni, int tid)
658 {
659 struct ieee80211_rx_ampdu *rap;
660
661 /* XXX TODO: sanity check tid, seq, baw */
662 rap = &ni->ni_rx_ampdu[tid];
663 ampdu_rx_stop(ni, rap);
664 }
665
666 /*
667 * Stop A-MPDU rx processing for the specified TID.
668 */
669 static void
670 ampdu_rx_stop(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap)
671 {
672
673 ampdu_rx_purge(rap);
674 rap->rxa_flags &= ~(IEEE80211_AGGR_RUNNING
675 | IEEE80211_AGGR_XCHGPEND
676 | IEEE80211_AGGR_WAITRX);
677 }
678
679 /*
680 * Dispatch a frame from the A-MPDU reorder queue. The
681 * frame is fed back into ieee80211_input marked with an
682 * M_AMPDU_MPDU flag so it doesn't come back to us (it also
683 * permits ieee80211_input to optimize re-processing).
684 */
685 static __inline void
686 ampdu_dispatch(struct ieee80211_node *ni, struct mbuf *m)
687 {
688 m->m_flags |= M_AMPDU_MPDU; /* bypass normal processing */
689 /* NB: rssi and noise are ignored w/ M_AMPDU_MPDU set */
690 (void) ieee80211_input(ni, m, 0, 0);
691 }
692
693 static int
694 ampdu_dispatch_slot(struct ieee80211_rx_ampdu *rap, struct ieee80211_node *ni,
695 int i)
696 {
697 struct mbuf *m;
698
699 if (rap->rxa_m[i] == NULL)
700 return (0);
701
702 m = rap->rxa_m[i];
703 rap->rxa_m[i] = NULL;
704 rap->rxa_qbytes -= m->m_pkthdr.len;
705 rap->rxa_qframes--;
706
707 ampdu_dispatch(ni, m);
708
709 return (1);
710 }
711
712 static void
713 ampdu_rx_moveup(struct ieee80211_rx_ampdu *rap, struct ieee80211_node *ni,
714 int i, int winstart)
715 {
716 struct ieee80211vap *vap = ni->ni_vap;
717
718 if (rap->rxa_qframes != 0) {
719 int n = rap->rxa_qframes, j;
720
721 if (winstart != -1) {
722 /*
723 * NB: in window-sliding mode, loop assumes i > 0
724 * and/or rxa_m[0] is NULL
725 */
726 KASSERT(rap->rxa_m[0] == NULL,
727 ("%s: BA window slot 0 occupied", __func__));
728 }
729 for (j = i+1; j < rap->rxa_wnd; j++) {
730 if (rap->rxa_m[j] != NULL) {
731 rap->rxa_m[j-i] = rap->rxa_m[j];
732 rap->rxa_m[j] = NULL;
733 if (--n == 0)
734 break;
735 }
736 }
737 KASSERT(n == 0, ("%s: lost %d frames, qframes %d off %d "
738 "BA win <%d:%d> winstart %d",
739 __func__, n, rap->rxa_qframes, i, rap->rxa_start,
740 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
741 winstart));
742 vap->iv_stats.is_ampdu_rx_copy += rap->rxa_qframes;
743 }
744 }
745
746 /*
747 * Dispatch as many frames as possible from the re-order queue.
748 * Frames will always be "at the front"; we process all frames
749 * up to the first empty slot in the window. On completion we
750 * cleanup state if there are still pending frames in the current
751 * BA window. We assume the frame at slot 0 is already handled
752 * by the caller; we always start at slot 1.
753 */
754 static void
755 ampdu_rx_dispatch(struct ieee80211_rx_ampdu *rap, struct ieee80211_node *ni)
756 {
757 struct ieee80211vap *vap = ni->ni_vap;
758 int i;
759
760 /* flush run of frames */
761 for (i = 1; i < rap->rxa_wnd; i++) {
762 if (ampdu_dispatch_slot(rap, ni, i) == 0)
763 break;
764 }
765
766 /*
767 * If frames remain, copy the mbuf pointers down so
768 * they correspond to the offsets in the new window.
769 */
770 ampdu_rx_moveup(rap, ni, i, -1);
771
772 /*
773 * Adjust the start of the BA window to
774 * reflect the frames just dispatched.
775 */
776 rap->rxa_start = IEEE80211_SEQ_ADD(rap->rxa_start, i);
777 vap->iv_stats.is_ampdu_rx_oor += i;
778 }
779
780 /*
781 * Dispatch all frames in the A-MPDU re-order queue.
782 */
783 static void
784 ampdu_rx_flush(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap)
785 {
786 struct ieee80211vap *vap = ni->ni_vap;
787 int i, r;
788
789 for (i = 0; i < rap->rxa_wnd; i++) {
790 r = ampdu_dispatch_slot(rap, ni, i);
791 if (r == 0)
792 continue;
793 vap->iv_stats.is_ampdu_rx_oor += r;
794
795 if (rap->rxa_qframes == 0)
796 break;
797 }
798 }
799
800 /*
801 * Dispatch all frames in the A-MPDU re-order queue
802 * preceding the specified sequence number. This logic
803 * handles window moves due to a received MSDU or BAR.
804 */
805 static void
806 ampdu_rx_flush_upto(struct ieee80211_node *ni,
807 struct ieee80211_rx_ampdu *rap, ieee80211_seq winstart)
808 {
809 struct ieee80211vap *vap = ni->ni_vap;
810 ieee80211_seq seqno;
811 int i, r;
812
813 /*
814 * Flush any complete MSDU's with a sequence number lower
815 * than winstart. Gaps may exist. Note that we may actually
816 * dispatch frames past winstart if a run continues; this is
817 * an optimization that avoids having to do a separate pass
818 * to dispatch frames after moving the BA window start.
819 */
820 seqno = rap->rxa_start;
821 for (i = 0; i < rap->rxa_wnd; i++) {
822 r = ampdu_dispatch_slot(rap, ni, i);
823 if (r == 0) {
824 if (!IEEE80211_SEQ_BA_BEFORE(seqno, winstart))
825 break;
826 }
827 vap->iv_stats.is_ampdu_rx_oor += r;
828 seqno = IEEE80211_SEQ_INC(seqno);
829 }
830 /*
831 * If frames remain, copy the mbuf pointers down so
832 * they correspond to the offsets in the new window.
833 */
834 ampdu_rx_moveup(rap, ni, i, winstart);
835
836 /*
837 * Move the start of the BA window; we use the
838 * sequence number of the last MSDU that was
839 * passed up the stack+1 or winstart if stopped on
840 * a gap in the reorder buffer.
841 */
842 rap->rxa_start = seqno;
843 }
844
845 /*
846 * Process a received QoS data frame for an HT station. Handle
847 * A-MPDU reordering: if this frame is received out of order
848 * and falls within the BA window hold onto it. Otherwise if
849 * this frame completes a run, flush any pending frames. We
850 * return 1 if the frame is consumed. A 0 is returned if
851 * the frame should be processed normally by the caller.
852 */
853 int
854 ieee80211_ampdu_reorder(struct ieee80211_node *ni, struct mbuf *m,
855 const struct ieee80211_rx_stats *rxs)
856 {
857 #define PROCESS 0 /* caller should process frame */
858 #define CONSUMED 1 /* frame consumed, caller does nothing */
859 struct ieee80211vap *vap = ni->ni_vap;
860 struct ieee80211_qosframe *wh;
861 struct ieee80211_rx_ampdu *rap;
862 ieee80211_seq rxseq;
863 uint8_t tid;
864 int off;
865
866 KASSERT((m->m_flags & (M_AMPDU | M_AMPDU_MPDU)) == M_AMPDU,
867 ("!a-mpdu or already re-ordered, flags 0x%x", m->m_flags));
868 KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT sta"));
869
870 /* NB: m_len known to be sufficient */
871 wh = mtod(m, struct ieee80211_qosframe *);
872 if (wh->i_fc[0] != IEEE80211_FC0_QOSDATA) {
873 /*
874 * Not QoS data, shouldn't get here but just
875 * return it to the caller for processing.
876 */
877 return PROCESS;
878 }
879
880 /*
881 * 802.11-2012 9.3.2.10 - Duplicate detection and recovery.
882 *
883 * Multicast QoS data frames are checked against a different
884 * counter, not the per-TID counter.
885 */
886 if (IEEE80211_IS_MULTICAST(wh->i_addr1))
887 return PROCESS;
888
889 if (IEEE80211_IS_DSTODS(wh))
890 tid = ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0];
891 else
892 tid = wh->i_qos[0];
893 tid &= IEEE80211_QOS_TID;
894 rap = &ni->ni_rx_ampdu[tid];
895 if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) {
896 /*
897 * No ADDBA request yet, don't touch.
898 */
899 return PROCESS;
900 }
901 rxseq = le16toh(*(uint16_t *)wh->i_seq);
902 if ((rxseq & IEEE80211_SEQ_FRAG_MASK) != 0) {
903 /*
904 * Fragments are not allowed; toss.
905 */
906 IEEE80211_DISCARD_MAC(vap,
907 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr,
908 "A-MPDU", "fragment, rxseq 0x%x tid %u%s", rxseq, tid,
909 wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : "");
910 vap->iv_stats.is_ampdu_rx_drop++;
911 IEEE80211_NODE_STAT(ni, rx_drop);
912 m_freem(m);
913 return CONSUMED;
914 }
915 rxseq >>= IEEE80211_SEQ_SEQ_SHIFT;
916 rap->rxa_nframes++;
917
918 /*
919 * Handle waiting for the first frame to define the BAW.
920 * Some firmware doesn't provide the RX of the starting point
921 * of the BAW and we have to cope.
922 */
923 if (rap->rxa_flags & IEEE80211_AGGR_WAITRX) {
924 rap->rxa_flags &= ~IEEE80211_AGGR_WAITRX;
925 rap->rxa_start = rxseq;
926 }
927 again:
928 if (rxseq == rap->rxa_start) {
929 /*
930 * First frame in window.
931 */
932 if (rap->rxa_qframes != 0) {
933 /*
934 * Dispatch as many packets as we can.
935 */
936 KASSERT(rap->rxa_m[0] == NULL, ("unexpected dup"));
937 ampdu_dispatch(ni, m);
938 ampdu_rx_dispatch(rap, ni);
939 return CONSUMED;
940 } else {
941 /*
942 * In order; advance window and notify
943 * caller to dispatch directly.
944 */
945 rap->rxa_start = IEEE80211_SEQ_INC(rxseq);
946 return PROCESS;
947 }
948 }
949 /*
950 * Frame is out of order; store if in the BA window.
951 */
952 /* calculate offset in BA window */
953 off = IEEE80211_SEQ_SUB(rxseq, rap->rxa_start);
954 if (off < rap->rxa_wnd) {
955 /*
956 * Common case (hopefully): in the BA window.
957 * Sec 9.10.7.6.2 a) (p.137)
958 */
959
960 /*
961 * Check for frames sitting too long in the reorder queue.
962 * This should only ever happen if frames are not delivered
963 * without the sender otherwise notifying us (e.g. with a
964 * BAR to move the window). Typically this happens because
965 * of vendor bugs that cause the sequence number to jump.
966 * When this happens we get a gap in the reorder queue that
967 * leaves frame sitting on the queue until they get pushed
968 * out due to window moves. When the vendor does not send
969 * BAR this move only happens due to explicit packet sends
970 *
971 * NB: we only track the time of the oldest frame in the
972 * reorder q; this means that if we flush we might push
973 * frames that still "new"; if this happens then subsequent
974 * frames will result in BA window moves which cost something
975 * but is still better than a big throughput dip.
976 */
977 if (rap->rxa_qframes != 0) {
978 /* XXX honor batimeout? */
979 if (ticks - rap->rxa_age > ieee80211_ampdu_age) {
980 /*
981 * Too long since we received the first
982 * frame; flush the reorder buffer.
983 */
984 if (rap->rxa_qframes != 0) {
985 vap->iv_stats.is_ampdu_rx_age +=
986 rap->rxa_qframes;
987 ampdu_rx_flush(ni, rap);
988 }
989 rap->rxa_start = IEEE80211_SEQ_INC(rxseq);
990 return PROCESS;
991 }
992 } else {
993 /*
994 * First frame, start aging timer.
995 */
996 rap->rxa_age = ticks;
997 }
998
999 /* save packet - this consumes, no matter what */
1000 ampdu_rx_add_slot(rap, off, tid, rxseq, ni, m);
1001
1002 return CONSUMED;
1003 }
1004 if (off < IEEE80211_SEQ_BA_RANGE) {
1005 /*
1006 * Outside the BA window, but within range;
1007 * flush the reorder q and move the window.
1008 * Sec 9.10.7.6.2 b) (p.138)
1009 */
1010 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni,
1011 "move BA win <%u:%u> (%u frames) rxseq %u tid %u",
1012 rap->rxa_start,
1013 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
1014 rap->rxa_qframes, rxseq, tid);
1015 vap->iv_stats.is_ampdu_rx_move++;
1016
1017 /*
1018 * The spec says to flush frames up to but not including:
1019 * WinStart_B = rxseq - rap->rxa_wnd + 1
1020 * Then insert the frame or notify the caller to process
1021 * it immediately. We can safely do this by just starting
1022 * over again because we know the frame will now be within
1023 * the BA window.
1024 */
1025 /* NB: rxa_wnd known to be >0 */
1026 ampdu_rx_flush_upto(ni, rap,
1027 IEEE80211_SEQ_SUB(rxseq, rap->rxa_wnd-1));
1028 goto again;
1029 } else {
1030 /*
1031 * Outside the BA window and out of range; toss.
1032 * Sec 9.10.7.6.2 c) (p.138)
1033 */
1034 IEEE80211_DISCARD_MAC(vap,
1035 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr,
1036 "MPDU", "BA win <%u:%u> (%u frames) rxseq %u tid %u%s",
1037 rap->rxa_start,
1038 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
1039 rap->rxa_qframes, rxseq, tid,
1040 wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : "");
1041 vap->iv_stats.is_ampdu_rx_drop++;
1042 IEEE80211_NODE_STAT(ni, rx_drop);
1043 m_freem(m);
1044 return CONSUMED;
1045 }
1046 #undef CONSUMED
1047 #undef PROCESS
1048 }
1049
1050 /*
1051 * Process a BAR ctl frame. Dispatch all frames up to
1052 * the sequence number of the frame. If this frame is
1053 * out of range it's discarded.
1054 */
1055 void
1056 ieee80211_recv_bar(struct ieee80211_node *ni, struct mbuf *m0)
1057 {
1058 struct ieee80211vap *vap = ni->ni_vap;
1059 struct ieee80211_frame_bar *wh;
1060 struct ieee80211_rx_ampdu *rap;
1061 ieee80211_seq rxseq;
1062 int tid, off;
1063
1064 if (!ieee80211_recv_bar_ena) {
1065 #if 0
1066 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_11N,
1067 ni->ni_macaddr, "BAR", "%s", "processing disabled");
1068 #endif
1069 vap->iv_stats.is_ampdu_bar_bad++;
1070 return;
1071 }
1072 wh = mtod(m0, struct ieee80211_frame_bar *);
1073 /* XXX check basic BAR */
1074 tid = MS(le16toh(wh->i_ctl), IEEE80211_BAR_TID);
1075 rap = &ni->ni_rx_ampdu[tid];
1076 if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) {
1077 /*
1078 * No ADDBA request yet, don't touch.
1079 */
1080 IEEE80211_DISCARD_MAC(vap,
1081 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N,
1082 ni->ni_macaddr, "BAR", "no BA stream, tid %u", tid);
1083 vap->iv_stats.is_ampdu_bar_bad++;
1084 return;
1085 }
1086 vap->iv_stats.is_ampdu_bar_rx++;
1087 rxseq = le16toh(wh->i_seq) >> IEEE80211_SEQ_SEQ_SHIFT;
1088 if (rxseq == rap->rxa_start)
1089 return;
1090 /* calculate offset in BA window */
1091 off = IEEE80211_SEQ_SUB(rxseq, rap->rxa_start);
1092 if (off < IEEE80211_SEQ_BA_RANGE) {
1093 /*
1094 * Flush the reorder q up to rxseq and move the window.
1095 * Sec 9.10.7.6.3 a) (p.138)
1096 */
1097 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni,
1098 "BAR moves BA win <%u:%u> (%u frames) rxseq %u tid %u",
1099 rap->rxa_start,
1100 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
1101 rap->rxa_qframes, rxseq, tid);
1102 vap->iv_stats.is_ampdu_bar_move++;
1103
1104 ampdu_rx_flush_upto(ni, rap, rxseq);
1105 if (off >= rap->rxa_wnd) {
1106 /*
1107 * BAR specifies a window start to the right of BA
1108 * window; we must move it explicitly since
1109 * ampdu_rx_flush_upto will not.
1110 */
1111 rap->rxa_start = rxseq;
1112 }
1113 } else {
1114 /*
1115 * Out of range; toss.
1116 * Sec 9.10.7.6.3 b) (p.138)
1117 */
1118 IEEE80211_DISCARD_MAC(vap,
1119 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr,
1120 "BAR", "BA win <%u:%u> (%u frames) rxseq %u tid %u%s",
1121 rap->rxa_start,
1122 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
1123 rap->rxa_qframes, rxseq, tid,
1124 wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : "");
1125 vap->iv_stats.is_ampdu_bar_oow++;
1126 IEEE80211_NODE_STAT(ni, rx_drop);
1127 }
1128 }
1129
1130 /*
1131 * Setup HT-specific state in a node. Called only
1132 * when HT use is negotiated so we don't do extra
1133 * work for temporary and/or legacy sta's.
1134 */
1135 void
1136 ieee80211_ht_node_init(struct ieee80211_node *ni)
1137 {
1138 struct ieee80211_tx_ampdu *tap;
1139 int tid;
1140
1141 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
1142 ni,
1143 "%s: called (%p)",
1144 __func__,
1145 ni);
1146
1147 if (ni->ni_flags & IEEE80211_NODE_HT) {
1148 /*
1149 * Clean AMPDU state on re-associate. This handles the case
1150 * where a station leaves w/o notifying us and then returns
1151 * before node is reaped for inactivity.
1152 */
1153 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
1154 ni,
1155 "%s: calling cleanup (%p)",
1156 __func__, ni);
1157 ieee80211_ht_node_cleanup(ni);
1158 }
1159 for (tid = 0; tid < WME_NUM_TID; tid++) {
1160 tap = &ni->ni_tx_ampdu[tid];
1161 tap->txa_tid = tid;
1162 tap->txa_ni = ni;
1163 ieee80211_txampdu_init_pps(tap);
1164 /* NB: further initialization deferred */
1165 }
1166 ni->ni_flags |= IEEE80211_NODE_HT | IEEE80211_NODE_AMPDU;
1167 }
1168
1169 /*
1170 * Cleanup HT-specific state in a node. Called only
1171 * when HT use has been marked.
1172 */
1173 void
1174 ieee80211_ht_node_cleanup(struct ieee80211_node *ni)
1175 {
1176 struct ieee80211com *ic = ni->ni_ic;
1177 int i;
1178
1179 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
1180 ni,
1181 "%s: called (%p)",
1182 __func__, ni);
1183
1184 KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT node"));
1185
1186 /* XXX optimize this */
1187 for (i = 0; i < WME_NUM_TID; i++) {
1188 struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[i];
1189 if (tap->txa_flags & IEEE80211_AGGR_SETUP)
1190 ampdu_tx_stop(tap);
1191 }
1192 for (i = 0; i < WME_NUM_TID; i++)
1193 ic->ic_ampdu_rx_stop(ni, &ni->ni_rx_ampdu[i]);
1194
1195 ni->ni_htcap = 0;
1196 ni->ni_flags &= ~IEEE80211_NODE_HT_ALL;
1197 }
1198
1199 /*
1200 * Age out HT resources for a station.
1201 */
1202 void
1203 ieee80211_ht_node_age(struct ieee80211_node *ni)
1204 {
1205 struct ieee80211vap *vap = ni->ni_vap;
1206 uint8_t tid;
1207
1208 KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT sta"));
1209
1210 for (tid = 0; tid < WME_NUM_TID; tid++) {
1211 struct ieee80211_rx_ampdu *rap;
1212
1213 rap = &ni->ni_rx_ampdu[tid];
1214 if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0)
1215 continue;
1216 if (rap->rxa_qframes == 0)
1217 continue;
1218 /*
1219 * Check for frames sitting too long in the reorder queue.
1220 * See above for more details on what's happening here.
1221 */
1222 /* XXX honor batimeout? */
1223 if (ticks - rap->rxa_age > ieee80211_ampdu_age) {
1224 /*
1225 * Too long since we received the first
1226 * frame; flush the reorder buffer.
1227 */
1228 vap->iv_stats.is_ampdu_rx_age += rap->rxa_qframes;
1229 ampdu_rx_flush(ni, rap);
1230 }
1231 }
1232 }
1233
1234 static struct ieee80211_channel *
1235 findhtchan(struct ieee80211com *ic, struct ieee80211_channel *c, int htflags)
1236 {
1237 return ieee80211_find_channel(ic, c->ic_freq,
1238 (c->ic_flags &~ IEEE80211_CHAN_HT) | htflags);
1239 }
1240
1241 /*
1242 * Adjust a channel to be HT/non-HT according to the vap's configuration.
1243 */
1244 struct ieee80211_channel *
1245 ieee80211_ht_adjust_channel(struct ieee80211com *ic,
1246 struct ieee80211_channel *chan, int flags)
1247 {
1248 struct ieee80211_channel *c;
1249
1250 if (flags & IEEE80211_FHT_HT) {
1251 /* promote to HT if possible */
1252 if (flags & IEEE80211_FHT_USEHT40) {
1253 if (!IEEE80211_IS_CHAN_HT40(chan)) {
1254 /* NB: arbitrarily pick ht40+ over ht40- */
1255 c = findhtchan(ic, chan, IEEE80211_CHAN_HT40U);
1256 if (c == NULL)
1257 c = findhtchan(ic, chan,
1258 IEEE80211_CHAN_HT40D);
1259 if (c == NULL)
1260 c = findhtchan(ic, chan,
1261 IEEE80211_CHAN_HT20);
1262 if (c != NULL)
1263 chan = c;
1264 }
1265 } else if (!IEEE80211_IS_CHAN_HT20(chan)) {
1266 c = findhtchan(ic, chan, IEEE80211_CHAN_HT20);
1267 if (c != NULL)
1268 chan = c;
1269 }
1270 } else if (IEEE80211_IS_CHAN_HT(chan)) {
1271 /* demote to legacy, HT use is disabled */
1272 c = ieee80211_find_channel(ic, chan->ic_freq,
1273 chan->ic_flags &~ IEEE80211_CHAN_HT);
1274 if (c != NULL)
1275 chan = c;
1276 }
1277 return chan;
1278 }
1279
1280 /*
1281 * Setup HT-specific state for a legacy WDS peer.
1282 */
1283 void
1284 ieee80211_ht_wds_init(struct ieee80211_node *ni)
1285 {
1286 struct ieee80211vap *vap = ni->ni_vap;
1287 struct ieee80211_tx_ampdu *tap;
1288 int tid;
1289
1290 KASSERT(vap->iv_flags_ht & IEEE80211_FHT_HT, ("no HT requested"));
1291
1292 /* XXX check scan cache in case peer has an ap and we have info */
1293 /*
1294 * If setup with a legacy channel; locate an HT channel.
1295 * Otherwise if the inherited channel (from a companion
1296 * AP) is suitable use it so we use the same location
1297 * for the extension channel).
1298 */
1299 ni->ni_chan = ieee80211_ht_adjust_channel(ni->ni_ic,
1300 ni->ni_chan, ieee80211_htchanflags(ni->ni_chan));
1301
1302 ni->ni_htcap = 0;
1303 if (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20)
1304 ni->ni_htcap |= IEEE80211_HTCAP_SHORTGI20;
1305 if (IEEE80211_IS_CHAN_HT40(ni->ni_chan)) {
1306 ni->ni_htcap |= IEEE80211_HTCAP_CHWIDTH40;
1307 ni->ni_chw = 40;
1308 if (IEEE80211_IS_CHAN_HT40U(ni->ni_chan))
1309 ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_ABOVE;
1310 else if (IEEE80211_IS_CHAN_HT40D(ni->ni_chan))
1311 ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_BELOW;
1312 if (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40)
1313 ni->ni_htcap |= IEEE80211_HTCAP_SHORTGI40;
1314 } else {
1315 ni->ni_chw = 20;
1316 ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_NONE;
1317 }
1318 ni->ni_htctlchan = ni->ni_chan->ic_ieee;
1319 if (vap->iv_flags_ht & IEEE80211_FHT_RIFS)
1320 ni->ni_flags |= IEEE80211_NODE_RIFS;
1321 /* XXX does it make sense to enable SMPS? */
1322
1323 ni->ni_htopmode = 0; /* XXX need protection state */
1324 ni->ni_htstbc = 0; /* XXX need info */
1325
1326 for (tid = 0; tid < WME_NUM_TID; tid++) {
1327 tap = &ni->ni_tx_ampdu[tid];
1328 tap->txa_tid = tid;
1329 ieee80211_txampdu_init_pps(tap);
1330 }
1331 /* NB: AMPDU tx/rx governed by IEEE80211_FHT_AMPDU_{TX,RX} */
1332 ni->ni_flags |= IEEE80211_NODE_HT | IEEE80211_NODE_AMPDU;
1333 }
1334
1335 /*
1336 * Notify hostap vaps of a change in the HTINFO ie.
1337 */
1338 static void
1339 htinfo_notify(struct ieee80211com *ic)
1340 {
1341 struct ieee80211vap *vap;
1342 int first = 1;
1343
1344 IEEE80211_LOCK_ASSERT(ic);
1345
1346 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1347 if (vap->iv_opmode != IEEE80211_M_HOSTAP)
1348 continue;
1349 if (vap->iv_state != IEEE80211_S_RUN ||
1350 !IEEE80211_IS_CHAN_HT(vap->iv_bss->ni_chan))
1351 continue;
1352 if (first) {
1353 IEEE80211_NOTE(vap,
1354 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N,
1355 vap->iv_bss,
1356 "HT bss occupancy change: %d sta, %d ht, "
1357 "%d ht40%s, HT protmode now 0x%x"
1358 , ic->ic_sta_assoc
1359 , ic->ic_ht_sta_assoc
1360 , ic->ic_ht40_sta_assoc
1361 , (ic->ic_flags_ht & IEEE80211_FHT_NONHT_PR) ?
1362 ", non-HT sta present" : ""
1363 , ic->ic_curhtprotmode);
1364 first = 0;
1365 }
1366 ieee80211_beacon_notify(vap, IEEE80211_BEACON_HTINFO);
1367 }
1368 }
1369
1370 /*
1371 * Calculate HT protection mode from current
1372 * state and handle updates.
1373 */
1374 static void
1375 htinfo_update(struct ieee80211com *ic)
1376 {
1377 uint8_t protmode;
1378
1379 if (ic->ic_sta_assoc != ic->ic_ht_sta_assoc) {
1380 protmode = IEEE80211_HTINFO_OPMODE_MIXED
1381 | IEEE80211_HTINFO_NONHT_PRESENT;
1382 } else if (ic->ic_flags_ht & IEEE80211_FHT_NONHT_PR) {
1383 protmode = IEEE80211_HTINFO_OPMODE_PROTOPT
1384 | IEEE80211_HTINFO_NONHT_PRESENT;
1385 } else if (ic->ic_bsschan != IEEE80211_CHAN_ANYC &&
1386 IEEE80211_IS_CHAN_HT40(ic->ic_bsschan) &&
1387 ic->ic_sta_assoc != ic->ic_ht40_sta_assoc) {
1388 protmode = IEEE80211_HTINFO_OPMODE_HT20PR;
1389 } else {
1390 protmode = IEEE80211_HTINFO_OPMODE_PURE;
1391 }
1392 if (protmode != ic->ic_curhtprotmode) {
1393 ic->ic_curhtprotmode = protmode;
1394 htinfo_notify(ic);
1395 }
1396 }
1397
1398 /*
1399 * Handle an HT station joining a BSS.
1400 */
1401 void
1402 ieee80211_ht_node_join(struct ieee80211_node *ni)
1403 {
1404 struct ieee80211com *ic = ni->ni_ic;
1405
1406 IEEE80211_LOCK_ASSERT(ic);
1407
1408 if (ni->ni_flags & IEEE80211_NODE_HT) {
1409 ic->ic_ht_sta_assoc++;
1410 if (ni->ni_chw == 40)
1411 ic->ic_ht40_sta_assoc++;
1412 }
1413 htinfo_update(ic);
1414 }
1415
1416 /*
1417 * Handle an HT station leaving a BSS.
1418 */
1419 void
1420 ieee80211_ht_node_leave(struct ieee80211_node *ni)
1421 {
1422 struct ieee80211com *ic = ni->ni_ic;
1423
1424 IEEE80211_LOCK_ASSERT(ic);
1425
1426 if (ni->ni_flags & IEEE80211_NODE_HT) {
1427 ic->ic_ht_sta_assoc--;
1428 if (ni->ni_chw == 40)
1429 ic->ic_ht40_sta_assoc--;
1430 }
1431 htinfo_update(ic);
1432 }
1433
1434 /*
1435 * Public version of htinfo_update; used for processing
1436 * beacon frames from overlapping bss.
1437 *
1438 * Caller can specify either IEEE80211_HTINFO_OPMODE_MIXED
1439 * (on receipt of a beacon that advertises MIXED) or
1440 * IEEE80211_HTINFO_OPMODE_PROTOPT (on receipt of a beacon
1441 * from an overlapping legacy bss). We treat MIXED with
1442 * a higher precedence than PROTOPT (i.e. we will not change
1443 * change PROTOPT -> MIXED; only MIXED -> PROTOPT). This
1444 * corresponds to how we handle things in htinfo_update.
1445 */
1446 void
1447 ieee80211_htprot_update(struct ieee80211com *ic, int protmode)
1448 {
1449 #define OPMODE(x) SM(x, IEEE80211_HTINFO_OPMODE)
1450 IEEE80211_LOCK(ic);
1451
1452 /* track non-HT station presence */
1453 KASSERT(protmode & IEEE80211_HTINFO_NONHT_PRESENT,
1454 ("protmode 0x%x", protmode));
1455 ic->ic_flags_ht |= IEEE80211_FHT_NONHT_PR;
1456 ic->ic_lastnonht = ticks;
1457
1458 if (protmode != ic->ic_curhtprotmode &&
1459 (OPMODE(ic->ic_curhtprotmode) != IEEE80211_HTINFO_OPMODE_MIXED ||
1460 OPMODE(protmode) == IEEE80211_HTINFO_OPMODE_PROTOPT)) {
1461 /* push beacon update */
1462 ic->ic_curhtprotmode = protmode;
1463 htinfo_notify(ic);
1464 }
1465 IEEE80211_UNLOCK(ic);
1466 #undef OPMODE
1467 }
1468
1469 /*
1470 * Time out presence of an overlapping bss with non-HT
1471 * stations. When operating in hostap mode we listen for
1472 * beacons from other stations and if we identify a non-HT
1473 * station is present we update the opmode field of the
1474 * HTINFO ie. To identify when all non-HT stations are
1475 * gone we time out this condition.
1476 */
1477 void
1478 ieee80211_ht_timeout(struct ieee80211com *ic)
1479 {
1480 IEEE80211_LOCK_ASSERT(ic);
1481
1482 if ((ic->ic_flags_ht & IEEE80211_FHT_NONHT_PR) &&
1483 ieee80211_time_after(ticks, ic->ic_lastnonht + IEEE80211_NONHT_PRESENT_AGE)) {
1484 #if 0
1485 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni,
1486 "%s", "time out non-HT STA present on channel");
1487 #endif
1488 ic->ic_flags_ht &= ~IEEE80211_FHT_NONHT_PR;
1489 htinfo_update(ic);
1490 }
1491 }
1492
1493 /*
1494 * Process an 802.11n HT capabilities ie.
1495 */
1496 void
1497 ieee80211_parse_htcap(struct ieee80211_node *ni, const uint8_t *ie)
1498 {
1499 if (ie[0] == IEEE80211_ELEMID_VENDOR) {
1500 /*
1501 * Station used Vendor OUI ie to associate;
1502 * mark the node so when we respond we'll use
1503 * the Vendor OUI's and not the standard ie's.
1504 */
1505 ni->ni_flags |= IEEE80211_NODE_HTCOMPAT;
1506 ie += 4;
1507 } else
1508 ni->ni_flags &= ~IEEE80211_NODE_HTCOMPAT;
1509
1510 ni->ni_htcap = le16dec(ie +
1511 __offsetof(struct ieee80211_ie_htcap, hc_cap));
1512 ni->ni_htparam = ie[__offsetof(struct ieee80211_ie_htcap, hc_param)];
1513 }
1514
1515 static void
1516 htinfo_parse(struct ieee80211_node *ni,
1517 const struct ieee80211_ie_htinfo *htinfo)
1518 {
1519 uint16_t w;
1520
1521 ni->ni_htctlchan = htinfo->hi_ctrlchannel;
1522 ni->ni_ht2ndchan = SM(htinfo->hi_byte1, IEEE80211_HTINFO_2NDCHAN);
1523 w = le16dec(&htinfo->hi_byte2);
1524 ni->ni_htopmode = SM(w, IEEE80211_HTINFO_OPMODE);
1525 w = le16dec(&htinfo->hi_byte45);
1526 ni->ni_htstbc = SM(w, IEEE80211_HTINFO_BASIC_STBCMCS);
1527 }
1528
1529 /*
1530 * Parse an 802.11n HT info ie and save useful information
1531 * to the node state. Note this does not effect any state
1532 * changes such as for channel width change.
1533 */
1534 void
1535 ieee80211_parse_htinfo(struct ieee80211_node *ni, const uint8_t *ie)
1536 {
1537 if (ie[0] == IEEE80211_ELEMID_VENDOR)
1538 ie += 4;
1539 htinfo_parse(ni, (const struct ieee80211_ie_htinfo *) ie);
1540 }
1541
1542 /*
1543 * Handle 11n/11ac channel switch.
1544 *
1545 * Use the received HT/VHT ie's to identify the right channel to use.
1546 * If we cannot locate it in the channel table then fallback to
1547 * legacy operation.
1548 *
1549 * Note that we use this information to identify the node's
1550 * channel only; the caller is responsible for insuring any
1551 * required channel change is done (e.g. in sta mode when
1552 * parsing the contents of a beacon frame).
1553 */
1554 static int
1555 htinfo_update_chw(struct ieee80211_node *ni, int htflags, int vhtflags)
1556 {
1557 struct ieee80211com *ic = ni->ni_ic;
1558 struct ieee80211_channel *c;
1559 int chanflags;
1560 int ret = 0;
1561
1562 /*
1563 * First step - do HT/VHT only channel lookup based on operating mode
1564 * flags. This involves masking out the VHT flags as well.
1565 * Otherwise we end up doing the full channel walk each time
1566 * we trigger this, which is expensive.
1567 */
1568 chanflags = (ni->ni_chan->ic_flags &~
1569 (IEEE80211_CHAN_HT | IEEE80211_CHAN_VHT)) | htflags | vhtflags;
1570
1571 if (chanflags == ni->ni_chan->ic_flags)
1572 goto done;
1573
1574 /*
1575 * If HT /or/ VHT flags have changed then check both.
1576 * We need to start by picking a HT channel anyway.
1577 */
1578
1579 c = NULL;
1580 chanflags = (ni->ni_chan->ic_flags &~
1581 (IEEE80211_CHAN_HT | IEEE80211_CHAN_VHT)) | htflags;
1582 /* XXX not right for ht40- */
1583 c = ieee80211_find_channel(ic, ni->ni_chan->ic_freq, chanflags);
1584 if (c == NULL && (htflags & IEEE80211_CHAN_HT40)) {
1585 /*
1586 * No HT40 channel entry in our table; fall back
1587 * to HT20 operation. This should not happen.
1588 */
1589 c = findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT20);
1590 #if 0
1591 IEEE80211_NOTE(ni->ni_vap,
1592 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni,
1593 "no HT40 channel (freq %u), falling back to HT20",
1594 ni->ni_chan->ic_freq);
1595 #endif
1596 /* XXX stat */
1597 }
1598
1599 /* Nothing found - leave it alone; move onto VHT */
1600 if (c == NULL)
1601 c = ni->ni_chan;
1602
1603 /*
1604 * If it's non-HT, then bail out now.
1605 */
1606 if (! IEEE80211_IS_CHAN_HT(c)) {
1607 IEEE80211_NOTE(ni->ni_vap,
1608 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni,
1609 "not HT; skipping VHT check (%u/0x%x)",
1610 c->ic_freq, c->ic_flags);
1611 goto done;
1612 }
1613
1614 /*
1615 * Next step - look at the current VHT flags and determine
1616 * if we need to upgrade. Mask out the VHT and HT flags since
1617 * the vhtflags field will already have the correct HT
1618 * flags to use.
1619 */
1620 if (IEEE80211_CONF_VHT(ic) && ni->ni_vhtcap != 0 && vhtflags != 0) {
1621 chanflags = (c->ic_flags
1622 &~ (IEEE80211_CHAN_HT | IEEE80211_CHAN_VHT))
1623 | vhtflags;
1624 IEEE80211_NOTE(ni->ni_vap,
1625 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N,
1626 ni,
1627 "%s: VHT; chanwidth=0x%02x; vhtflags=0x%08x",
1628 __func__, ni->ni_vht_chanwidth, vhtflags);
1629
1630 IEEE80211_NOTE(ni->ni_vap,
1631 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N,
1632 ni,
1633 "%s: VHT; trying lookup for %d/0x%08x",
1634 __func__, c->ic_freq, chanflags);
1635 c = ieee80211_find_channel(ic, c->ic_freq, chanflags);
1636 }
1637
1638 /* Finally, if it's changed */
1639 if (c != NULL && c != ni->ni_chan) {
1640 IEEE80211_NOTE(ni->ni_vap,
1641 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni,
1642 "switch station to %s%d channel %u/0x%x",
1643 IEEE80211_IS_CHAN_VHT(c) ? "VHT" : "HT",
1644 IEEE80211_IS_CHAN_VHT80(c) ? 80 :
1645 (IEEE80211_IS_CHAN_HT40(c) ? 40 : 20),
1646 c->ic_freq, c->ic_flags);
1647 ni->ni_chan = c;
1648 ret = 1;
1649 }
1650 /* NB: caller responsible for forcing any channel change */
1651
1652 done:
1653 /* update node's (11n) tx channel width */
1654 ni->ni_chw = IEEE80211_IS_CHAN_HT40(ni->ni_chan)? 40 : 20;
1655 return (ret);
1656 }
1657
1658 /*
1659 * Update 11n MIMO PS state according to received htcap.
1660 */
1661 static __inline int
1662 htcap_update_mimo_ps(struct ieee80211_node *ni)
1663 {
1664 uint16_t oflags = ni->ni_flags;
1665
1666 switch (ni->ni_htcap & IEEE80211_HTCAP_SMPS) {
1667 case IEEE80211_HTCAP_SMPS_DYNAMIC:
1668 ni->ni_flags |= IEEE80211_NODE_MIMO_PS;
1669 ni->ni_flags |= IEEE80211_NODE_MIMO_RTS;
1670 break;
1671 case IEEE80211_HTCAP_SMPS_ENA:
1672 ni->ni_flags |= IEEE80211_NODE_MIMO_PS;
1673 ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS;
1674 break;
1675 case IEEE80211_HTCAP_SMPS_OFF:
1676 default: /* disable on rx of reserved value */
1677 ni->ni_flags &= ~IEEE80211_NODE_MIMO_PS;
1678 ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS;
1679 break;
1680 }
1681 return (oflags ^ ni->ni_flags);
1682 }
1683
1684 /*
1685 * Update short GI state according to received htcap
1686 * and local settings.
1687 */
1688 static __inline void
1689 htcap_update_shortgi(struct ieee80211_node *ni)
1690 {
1691 struct ieee80211vap *vap = ni->ni_vap;
1692
1693 ni->ni_flags &= ~(IEEE80211_NODE_SGI20|IEEE80211_NODE_SGI40);
1694 if ((ni->ni_htcap & IEEE80211_HTCAP_SHORTGI20) &&
1695 (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20))
1696 ni->ni_flags |= IEEE80211_NODE_SGI20;
1697 if ((ni->ni_htcap & IEEE80211_HTCAP_SHORTGI40) &&
1698 (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40))
1699 ni->ni_flags |= IEEE80211_NODE_SGI40;
1700 }
1701
1702 /*
1703 * Update LDPC state according to received htcap
1704 * and local settings.
1705 */
1706 static __inline void
1707 htcap_update_ldpc(struct ieee80211_node *ni)
1708 {
1709 struct ieee80211vap *vap = ni->ni_vap;
1710
1711 if ((ni->ni_htcap & IEEE80211_HTCAP_LDPC) &&
1712 (vap->iv_flags_ht & IEEE80211_FHT_LDPC_TX))
1713 ni->ni_flags |= IEEE80211_NODE_LDPC;
1714 }
1715
1716 /*
1717 * Parse and update HT-related state extracted from
1718 * the HT cap and info ie's.
1719 *
1720 * This is called from the STA management path and
1721 * the ieee80211_node_join() path. It will take into
1722 * account the IEs discovered during scanning and
1723 * adjust things accordingly.
1724 */
1725 void
1726 ieee80211_ht_updateparams(struct ieee80211_node *ni,
1727 const uint8_t *htcapie, const uint8_t *htinfoie)
1728 {
1729 struct ieee80211vap *vap = ni->ni_vap;
1730 const struct ieee80211_ie_htinfo *htinfo;
1731
1732 ieee80211_parse_htcap(ni, htcapie);
1733 if (vap->iv_htcaps & IEEE80211_HTCAP_SMPS)
1734 htcap_update_mimo_ps(ni);
1735 htcap_update_shortgi(ni);
1736 htcap_update_ldpc(ni);
1737
1738 if (htinfoie[0] == IEEE80211_ELEMID_VENDOR)
1739 htinfoie += 4;
1740 htinfo = (const struct ieee80211_ie_htinfo *) htinfoie;
1741 htinfo_parse(ni, htinfo);
1742
1743 /*
1744 * Defer the node channel change; we need to now
1745 * update VHT parameters before we do it.
1746 */
1747
1748 if ((htinfo->hi_byte1 & IEEE80211_HTINFO_RIFSMODE_PERM) &&
1749 (vap->iv_flags_ht & IEEE80211_FHT_RIFS))
1750 ni->ni_flags |= IEEE80211_NODE_RIFS;
1751 else
1752 ni->ni_flags &= ~IEEE80211_NODE_RIFS;
1753 }
1754
1755 static uint32_t
1756 ieee80211_vht_get_vhtflags(struct ieee80211_node *ni, uint32_t htflags)
1757 {
1758 struct ieee80211vap *vap = ni->ni_vap;
1759 uint32_t vhtflags = 0;
1760
1761 vhtflags = 0;
1762 if (ni->ni_flags & IEEE80211_NODE_VHT && vap->iv_flags_vht & IEEE80211_FVHT_VHT) {
1763 if ((ni->ni_vht_chanwidth == IEEE80211_VHT_CHANWIDTH_160MHZ) &&
1764 /* XXX 2 means "160MHz and 80+80MHz", 1 means "160MHz" */
1765 (MS(vap->iv_vhtcaps,
1766 IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_MASK) >= 1) &&
1767 (vap->iv_flags_vht & IEEE80211_FVHT_USEVHT160)) {
1768 vhtflags = IEEE80211_CHAN_VHT160;
1769 /* Mirror the HT40 flags */
1770 if (htflags == IEEE80211_CHAN_HT40U) {
1771 vhtflags |= IEEE80211_CHAN_HT40U;
1772 } else if (htflags == IEEE80211_CHAN_HT40D) {
1773 vhtflags |= IEEE80211_CHAN_HT40D;
1774 }
1775 } else if ((ni->ni_vht_chanwidth == IEEE80211_VHT_CHANWIDTH_80P80MHZ) &&
1776 /* XXX 2 means "160MHz and 80+80MHz" */
1777 (MS(vap->iv_vhtcaps,
1778 IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_MASK) == 2) &&
1779 (vap->iv_flags_vht & IEEE80211_FVHT_USEVHT80P80)) {
1780 vhtflags = IEEE80211_CHAN_VHT80_80;
1781 /* Mirror the HT40 flags */
1782 if (htflags == IEEE80211_CHAN_HT40U) {
1783 vhtflags |= IEEE80211_CHAN_HT40U;
1784 } else if (htflags == IEEE80211_CHAN_HT40D) {
1785 vhtflags |= IEEE80211_CHAN_HT40D;
1786 }
1787 } else if ((ni->ni_vht_chanwidth == IEEE80211_VHT_CHANWIDTH_80MHZ) &&
1788 (vap->iv_flags_vht & IEEE80211_FVHT_USEVHT80)) {
1789 vhtflags = IEEE80211_CHAN_VHT80;
1790 /* Mirror the HT40 flags */
1791 if (htflags == IEEE80211_CHAN_HT40U) {
1792 vhtflags |= IEEE80211_CHAN_HT40U;
1793 } else if (htflags == IEEE80211_CHAN_HT40D) {
1794 vhtflags |= IEEE80211_CHAN_HT40D;
1795 }
1796 } else if (ni->ni_vht_chanwidth == IEEE80211_VHT_CHANWIDTH_USE_HT) {
1797 /* Mirror the HT40 flags */
1798 /*
1799 * XXX TODO: if ht40 is disabled, but vht40 isn't
1800 * disabled then this logic will get very, very sad.
1801 * It's quite possible the only sane thing to do is
1802 * to not have vht40 as an option, and just obey
1803 * 'ht40' as that flag.
1804 */
1805 if ((htflags == IEEE80211_CHAN_HT40U) &&
1806 (vap->iv_flags_vht & IEEE80211_FVHT_USEVHT40)) {
1807 vhtflags = IEEE80211_CHAN_VHT40U
1808 | IEEE80211_CHAN_HT40U;
1809 } else if (htflags == IEEE80211_CHAN_HT40D &&
1810 (vap->iv_flags_vht & IEEE80211_FVHT_USEVHT40)) {
1811 vhtflags = IEEE80211_CHAN_VHT40D
1812 | IEEE80211_CHAN_HT40D;
1813 } else if (htflags == IEEE80211_CHAN_HT20) {
1814 vhtflags = IEEE80211_CHAN_VHT20
1815 | IEEE80211_CHAN_HT20;
1816 }
1817 } else {
1818 vhtflags = IEEE80211_CHAN_VHT20;
1819 }
1820 }
1821 return (vhtflags);
1822 }
1823
1824 /*
1825 * Final part of updating the HT parameters.
1826 *
1827 * This is called from the STA management path and
1828 * the ieee80211_node_join() path. It will take into
1829 * account the IEs discovered during scanning and
1830 * adjust things accordingly.
1831 *
1832 * This is done after a call to ieee80211_ht_updateparams()
1833 * because it (and the upcoming VHT version of updateparams)
1834 * needs to ensure everything is parsed before htinfo_update_chw()
1835 * is called - which will change the channel config for the
1836 * node for us.
1837 */
1838 int
1839 ieee80211_ht_updateparams_final(struct ieee80211_node *ni,
1840 const uint8_t *htcapie, const uint8_t *htinfoie)
1841 {
1842 struct ieee80211vap *vap = ni->ni_vap;
1843 const struct ieee80211_ie_htinfo *htinfo;
1844 int htflags, vhtflags;
1845 int ret = 0;
1846
1847 htinfo = (const struct ieee80211_ie_htinfo *) htinfoie;
1848
1849 htflags = (vap->iv_flags_ht & IEEE80211_FHT_HT) ?
1850 IEEE80211_CHAN_HT20 : 0;
1851
1852 /* NB: honor operating mode constraint */
1853 if ((htinfo->hi_byte1 & IEEE80211_HTINFO_TXWIDTH_2040) &&
1854 (vap->iv_flags_ht & IEEE80211_FHT_USEHT40)) {
1855 if (ni->ni_ht2ndchan == IEEE80211_HTINFO_2NDCHAN_ABOVE)
1856 htflags = IEEE80211_CHAN_HT40U;
1857 else if (ni->ni_ht2ndchan == IEEE80211_HTINFO_2NDCHAN_BELOW)
1858 htflags = IEEE80211_CHAN_HT40D;
1859 }
1860
1861 /*
1862 * VHT flags - do much the same; check whether VHT is available
1863 * and if so, what our ideal channel use would be based on our
1864 * capabilities and the (pre-parsed) VHT info IE.
1865 */
1866 vhtflags = ieee80211_vht_get_vhtflags(ni, htflags);
1867
1868 if (htinfo_update_chw(ni, htflags, vhtflags))
1869 ret = 1;
1870
1871 return (ret);
1872 }
1873
1874 /*
1875 * Parse and update HT-related state extracted from the HT cap ie
1876 * for a station joining an HT BSS.
1877 *
1878 * This is called from the hostap path for each station.
1879 */
1880 void
1881 ieee80211_ht_updatehtcap(struct ieee80211_node *ni, const uint8_t *htcapie)
1882 {
1883 struct ieee80211vap *vap = ni->ni_vap;
1884
1885 ieee80211_parse_htcap(ni, htcapie);
1886 if (vap->iv_htcaps & IEEE80211_HTCAP_SMPS)
1887 htcap_update_mimo_ps(ni);
1888 htcap_update_shortgi(ni);
1889 htcap_update_ldpc(ni);
1890 }
1891
1892 /*
1893 * Called once HT and VHT capabilities are parsed in hostap mode -
1894 * this will adjust the channel configuration of the given node
1895 * based on the configuration and capabilities.
1896 */
1897 void
1898 ieee80211_ht_updatehtcap_final(struct ieee80211_node *ni)
1899 {
1900 struct ieee80211vap *vap = ni->ni_vap;
1901 int htflags;
1902 int vhtflags;
1903
1904 /* NB: honor operating mode constraint */
1905 /* XXX 40 MHz intolerant */
1906 htflags = (vap->iv_flags_ht & IEEE80211_FHT_HT) ?
1907 IEEE80211_CHAN_HT20 : 0;
1908 if ((ni->ni_htcap & IEEE80211_HTCAP_CHWIDTH40) &&
1909 (vap->iv_flags_ht & IEEE80211_FHT_USEHT40)) {
1910 if (IEEE80211_IS_CHAN_HT40U(vap->iv_bss->ni_chan))
1911 htflags = IEEE80211_CHAN_HT40U;
1912 else if (IEEE80211_IS_CHAN_HT40D(vap->iv_bss->ni_chan))
1913 htflags = IEEE80211_CHAN_HT40D;
1914 }
1915 /*
1916 * VHT flags - do much the same; check whether VHT is available
1917 * and if so, what our ideal channel use would be based on our
1918 * capabilities and the (pre-parsed) VHT info IE.
1919 */
1920 vhtflags = ieee80211_vht_get_vhtflags(ni, htflags);
1921
1922 (void) htinfo_update_chw(ni, htflags, vhtflags);
1923 }
1924
1925 /*
1926 * Install received HT rate set by parsing the HT cap ie.
1927 */
1928 int
1929 ieee80211_setup_htrates(struct ieee80211_node *ni, const uint8_t *ie, int flags)
1930 {
1931 struct ieee80211com *ic = ni->ni_ic;
1932 struct ieee80211vap *vap = ni->ni_vap;
1933 const struct ieee80211_ie_htcap *htcap;
1934 struct ieee80211_htrateset *rs;
1935 int i, maxequalmcs, maxunequalmcs;
1936
1937 maxequalmcs = ic->ic_txstream * 8 - 1;
1938 maxunequalmcs = 0;
1939 if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL) {
1940 if (ic->ic_txstream >= 2)
1941 maxunequalmcs = 38;
1942 if (ic->ic_txstream >= 3)
1943 maxunequalmcs = 52;
1944 if (ic->ic_txstream >= 4)
1945 maxunequalmcs = 76;
1946 }
1947
1948 rs = &ni->ni_htrates;
1949 memset(rs, 0, sizeof(*rs));
1950 if (ie != NULL) {
1951 if (ie[0] == IEEE80211_ELEMID_VENDOR)
1952 ie += 4;
1953 htcap = (const struct ieee80211_ie_htcap *) ie;
1954 for (i = 0; i < IEEE80211_HTRATE_MAXSIZE; i++) {
1955 if (isclr(htcap->hc_mcsset, i))
1956 continue;
1957 if (rs->rs_nrates == IEEE80211_HTRATE_MAXSIZE) {
1958 IEEE80211_NOTE(vap,
1959 IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni,
1960 "WARNING, HT rate set too large; only "
1961 "using %u rates", IEEE80211_HTRATE_MAXSIZE);
1962 vap->iv_stats.is_rx_rstoobig++;
1963 break;
1964 }
1965 if (i <= 31 && i > maxequalmcs)
1966 continue;
1967 if (i == 32 &&
1968 (ic->ic_htcaps & IEEE80211_HTC_TXMCS32) == 0)
1969 continue;
1970 if (i > 32 && i > maxunequalmcs)
1971 continue;
1972 rs->rs_rates[rs->rs_nrates++] = i;
1973 }
1974 }
1975 return ieee80211_fix_rate(ni, (struct ieee80211_rateset *) rs, flags);
1976 }
1977
1978 /*
1979 * Mark rates in a node's HT rate set as basic according
1980 * to the information in the supplied HT info ie.
1981 */
1982 void
1983 ieee80211_setup_basic_htrates(struct ieee80211_node *ni, const uint8_t *ie)
1984 {
1985 const struct ieee80211_ie_htinfo *htinfo;
1986 struct ieee80211_htrateset *rs;
1987 int i, j;
1988
1989 if (ie[0] == IEEE80211_ELEMID_VENDOR)
1990 ie += 4;
1991 htinfo = (const struct ieee80211_ie_htinfo *) ie;
1992 rs = &ni->ni_htrates;
1993 if (rs->rs_nrates == 0) {
1994 IEEE80211_NOTE(ni->ni_vap,
1995 IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni,
1996 "%s", "WARNING, empty HT rate set");
1997 return;
1998 }
1999 for (i = 0; i < IEEE80211_HTRATE_MAXSIZE; i++) {
2000 if (isclr(htinfo->hi_basicmcsset, i))
2001 continue;
2002 for (j = 0; j < rs->rs_nrates; j++)
2003 if ((rs->rs_rates[j] & IEEE80211_RATE_VAL) == i)
2004 rs->rs_rates[j] |= IEEE80211_RATE_BASIC;
2005 }
2006 }
2007
2008 static void
2009 ampdu_tx_setup(struct ieee80211_tx_ampdu *tap)
2010 {
2011 callout_init(&tap->txa_timer, 1);
2012 tap->txa_flags |= IEEE80211_AGGR_SETUP;
2013 tap->txa_lastsample = ticks;
2014 }
2015
2016 static void
2017 ampdu_tx_stop(struct ieee80211_tx_ampdu *tap)
2018 {
2019 struct ieee80211_node *ni = tap->txa_ni;
2020 struct ieee80211com *ic = ni->ni_ic;
2021
2022 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N,
2023 tap->txa_ni,
2024 "%s: called",
2025 __func__);
2026
2027 KASSERT(tap->txa_flags & IEEE80211_AGGR_SETUP,
2028 ("txa_flags 0x%x tid %d ac %d", tap->txa_flags, tap->txa_tid,
2029 TID_TO_WME_AC(tap->txa_tid)));
2030
2031 /*
2032 * Stop BA stream if setup so driver has a chance
2033 * to reclaim any resources it might have allocated.
2034 */
2035 ic->ic_addba_stop(ni, tap);
2036 /*
2037 * Stop any pending BAR transmit.
2038 */
2039 bar_stop_timer(tap);
2040
2041 /*
2042 * Reset packet estimate.
2043 */
2044 ieee80211_txampdu_init_pps(tap);
2045
2046 /* NB: clearing NAK means we may re-send ADDBA */
2047 tap->txa_flags &= ~(IEEE80211_AGGR_SETUP | IEEE80211_AGGR_NAK);
2048 }
2049
2050 /*
2051 * ADDBA response timeout.
2052 *
2053 * If software aggregation and per-TID queue management was done here,
2054 * that queue would be unpaused after the ADDBA timeout occurs.
2055 */
2056 static void
2057 addba_timeout(void *arg)
2058 {
2059 struct ieee80211_tx_ampdu *tap = arg;
2060 struct ieee80211_node *ni = tap->txa_ni;
2061 struct ieee80211com *ic = ni->ni_ic;
2062
2063 /* XXX ? */
2064 tap->txa_flags &= ~IEEE80211_AGGR_XCHGPEND;
2065 tap->txa_attempts++;
2066 ic->ic_addba_response_timeout(ni, tap);
2067 }
2068
2069 static void
2070 addba_start_timeout(struct ieee80211_tx_ampdu *tap)
2071 {
2072 /* XXX use CALLOUT_PENDING instead? */
2073 callout_reset(&tap->txa_timer, ieee80211_addba_timeout,
2074 addba_timeout, tap);
2075 tap->txa_flags |= IEEE80211_AGGR_XCHGPEND;
2076 tap->txa_nextrequest = ticks + ieee80211_addba_timeout;
2077 }
2078
2079 static void
2080 addba_stop_timeout(struct ieee80211_tx_ampdu *tap)
2081 {
2082 /* XXX use CALLOUT_PENDING instead? */
2083 if (tap->txa_flags & IEEE80211_AGGR_XCHGPEND) {
2084 callout_stop(&tap->txa_timer);
2085 tap->txa_flags &= ~IEEE80211_AGGR_XCHGPEND;
2086 }
2087 }
2088
2089 static void
2090 null_addba_response_timeout(struct ieee80211_node *ni,
2091 struct ieee80211_tx_ampdu *tap)
2092 {
2093 }
2094
2095 /*
2096 * Default method for requesting A-MPDU tx aggregation.
2097 * We setup the specified state block and start a timer
2098 * to wait for an ADDBA response frame.
2099 */
2100 static int
2101 ieee80211_addba_request(struct ieee80211_node *ni,
2102 struct ieee80211_tx_ampdu *tap,
2103 int dialogtoken, int baparamset, int batimeout)
2104 {
2105 int bufsiz;
2106
2107 /* XXX locking */
2108 tap->txa_token = dialogtoken;
2109 tap->txa_flags |= IEEE80211_AGGR_IMMEDIATE;
2110 bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ);
2111 tap->txa_wnd = (bufsiz == 0) ?
2112 IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX);
2113 addba_start_timeout(tap);
2114 return 1;
2115 }
2116
2117 /*
2118 * Called by drivers that wish to request an ADDBA session be
2119 * setup. This brings it up and starts the request timer.
2120 */
2121 int
2122 ieee80211_ampdu_tx_request_ext(struct ieee80211_node *ni, int tid)
2123 {
2124 struct ieee80211_tx_ampdu *tap;
2125
2126 if (tid < 0 || tid > 15)
2127 return (0);
2128 tap = &ni->ni_tx_ampdu[tid];
2129
2130 /* XXX locking */
2131 if ((tap->txa_flags & IEEE80211_AGGR_SETUP) == 0) {
2132 /* do deferred setup of state */
2133 ampdu_tx_setup(tap);
2134 }
2135 /* XXX hack for not doing proper locking */
2136 tap->txa_flags &= ~IEEE80211_AGGR_NAK;
2137 addba_start_timeout(tap);
2138 return (1);
2139 }
2140
2141 /*
2142 * Called by drivers that have marked a session as active.
2143 */
2144 int
2145 ieee80211_ampdu_tx_request_active_ext(struct ieee80211_node *ni, int tid,
2146 int status)
2147 {
2148 struct ieee80211_tx_ampdu *tap;
2149
2150 if (tid < 0 || tid > 15)
2151 return (0);
2152 tap = &ni->ni_tx_ampdu[tid];
2153
2154 /* XXX locking */
2155 addba_stop_timeout(tap);
2156 if (status == 1) {
2157 tap->txa_flags |= IEEE80211_AGGR_RUNNING;
2158 tap->txa_attempts = 0;
2159 } else {
2160 /* mark tid so we don't try again */
2161 tap->txa_flags |= IEEE80211_AGGR_NAK;
2162 }
2163 return (1);
2164 }
2165
2166 /*
2167 * Default method for processing an A-MPDU tx aggregation
2168 * response. We shutdown any pending timer and update the
2169 * state block according to the reply.
2170 */
2171 static int
2172 ieee80211_addba_response(struct ieee80211_node *ni,
2173 struct ieee80211_tx_ampdu *tap,
2174 int status, int baparamset, int batimeout)
2175 {
2176 int bufsiz, tid;
2177
2178 /* XXX locking */
2179 addba_stop_timeout(tap);
2180 if (status == IEEE80211_STATUS_SUCCESS) {
2181 bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ);
2182 /* XXX override our request? */
2183 tap->txa_wnd = (bufsiz == 0) ?
2184 IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX);
2185 /* XXX AC/TID */
2186 tid = MS(baparamset, IEEE80211_BAPS_TID);
2187 tap->txa_flags |= IEEE80211_AGGR_RUNNING;
2188 tap->txa_attempts = 0;
2189 } else {
2190 /* mark tid so we don't try again */
2191 tap->txa_flags |= IEEE80211_AGGR_NAK;
2192 }
2193 return 1;
2194 }
2195
2196 /*
2197 * Default method for stopping A-MPDU tx aggregation.
2198 * Any timer is cleared and we drain any pending frames.
2199 */
2200 static void
2201 ieee80211_addba_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap)
2202 {
2203 /* XXX locking */
2204 addba_stop_timeout(tap);
2205 if (tap->txa_flags & IEEE80211_AGGR_RUNNING) {
2206 /* XXX clear aggregation queue */
2207 tap->txa_flags &= ~IEEE80211_AGGR_RUNNING;
2208 }
2209 tap->txa_attempts = 0;
2210 }
2211
2212 /*
2213 * Process a received action frame using the default aggregation
2214 * policy. We intercept ADDBA-related frames and use them to
2215 * update our aggregation state. All other frames are passed up
2216 * for processing by ieee80211_recv_action.
2217 */
2218 static int
2219 ht_recv_action_ba_addba_request(struct ieee80211_node *ni,
2220 const struct ieee80211_frame *wh,
2221 const uint8_t *frm, const uint8_t *efrm)
2222 {
2223 struct ieee80211com *ic = ni->ni_ic;
2224 struct ieee80211vap *vap = ni->ni_vap;
2225 struct ieee80211_rx_ampdu *rap;
2226 uint8_t dialogtoken;
2227 uint16_t baparamset, batimeout, baseqctl;
2228 uint16_t args[5];
2229 int tid;
2230
2231 dialogtoken = frm[2];
2232 baparamset = le16dec(frm+3);
2233 batimeout = le16dec(frm+5);
2234 baseqctl = le16dec(frm+7);
2235
2236 tid = MS(baparamset, IEEE80211_BAPS_TID);
2237
2238 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2239 "recv ADDBA request: dialogtoken %u baparamset 0x%x "
2240 "(tid %d bufsiz %d) batimeout %d baseqctl %d:%d",
2241 dialogtoken, baparamset,
2242 tid, MS(baparamset, IEEE80211_BAPS_BUFSIZ),
2243 batimeout,
2244 MS(baseqctl, IEEE80211_BASEQ_START),
2245 MS(baseqctl, IEEE80211_BASEQ_FRAG));
2246
2247 rap = &ni->ni_rx_ampdu[tid];
2248
2249 /* Send ADDBA response */
2250 args[0] = dialogtoken;
2251 /*
2252 * NB: We ack only if the sta associated with HT and
2253 * the ap is configured to do AMPDU rx (the latter
2254 * violates the 11n spec and is mostly for testing).
2255 */
2256 if ((ni->ni_flags & IEEE80211_NODE_AMPDU_RX) &&
2257 (vap->iv_flags_ht & IEEE80211_FHT_AMPDU_RX)) {
2258 /* XXX handle ampdu_rx_start failure */
2259 ic->ic_ampdu_rx_start(ni, rap,
2260 baparamset, batimeout, baseqctl);
2261
2262 args[1] = IEEE80211_STATUS_SUCCESS;
2263 } else {
2264 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
2265 ni, "reject ADDBA request: %s",
2266 ni->ni_flags & IEEE80211_NODE_AMPDU_RX ?
2267 "administratively disabled" :
2268 "not negotiated for station");
2269 vap->iv_stats.is_addba_reject++;
2270 args[1] = IEEE80211_STATUS_UNSPECIFIED;
2271 }
2272 /* XXX honor rap flags? */
2273 args[2] = IEEE80211_BAPS_POLICY_IMMEDIATE
2274 | SM(tid, IEEE80211_BAPS_TID)
2275 | SM(rap->rxa_wnd, IEEE80211_BAPS_BUFSIZ)
2276 ;
2277 args[3] = 0;
2278 args[4] = 0;
2279 ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA,
2280 IEEE80211_ACTION_BA_ADDBA_RESPONSE, args);
2281 return 0;
2282 }
2283
2284 static int
2285 ht_recv_action_ba_addba_response(struct ieee80211_node *ni,
2286 const struct ieee80211_frame *wh,
2287 const uint8_t *frm, const uint8_t *efrm)
2288 {
2289 struct ieee80211com *ic = ni->ni_ic;
2290 struct ieee80211vap *vap = ni->ni_vap;
2291 struct ieee80211_tx_ampdu *tap;
2292 uint8_t dialogtoken, policy;
2293 uint16_t baparamset, batimeout, code;
2294 int tid, bufsiz;
2295
2296 dialogtoken = frm[2];
2297 code = le16dec(frm+3);
2298 baparamset = le16dec(frm+5);
2299 tid = MS(baparamset, IEEE80211_BAPS_TID);
2300 bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ);
2301 policy = MS(baparamset, IEEE80211_BAPS_POLICY);
2302 batimeout = le16dec(frm+7);
2303
2304 tap = &ni->ni_tx_ampdu[tid];
2305 if ((tap->txa_flags & IEEE80211_AGGR_XCHGPEND) == 0) {
2306 IEEE80211_DISCARD_MAC(vap,
2307 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
2308 ni->ni_macaddr, "ADDBA response",
2309 "no pending ADDBA, tid %d dialogtoken %u "
2310 "code %d", tid, dialogtoken, code);
2311 vap->iv_stats.is_addba_norequest++;
2312 return 0;
2313 }
2314 if (dialogtoken != tap->txa_token) {
2315 IEEE80211_DISCARD_MAC(vap,
2316 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
2317 ni->ni_macaddr, "ADDBA response",
2318 "dialogtoken mismatch: waiting for %d, "
2319 "received %d, tid %d code %d",
2320 tap->txa_token, dialogtoken, tid, code);
2321 vap->iv_stats.is_addba_badtoken++;
2322 return 0;
2323 }
2324 /* NB: assumes IEEE80211_AGGR_IMMEDIATE is 1 */
2325 if (policy != (tap->txa_flags & IEEE80211_AGGR_IMMEDIATE)) {
2326 IEEE80211_DISCARD_MAC(vap,
2327 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
2328 ni->ni_macaddr, "ADDBA response",
2329 "policy mismatch: expecting %s, "
2330 "received %s, tid %d code %d",
2331 tap->txa_flags & IEEE80211_AGGR_IMMEDIATE,
2332 policy, tid, code);
2333 vap->iv_stats.is_addba_badpolicy++;
2334 return 0;
2335 }
2336 #if 0
2337 /* XXX we take MIN in ieee80211_addba_response */
2338 if (bufsiz > IEEE80211_AGGR_BAWMAX) {
2339 IEEE80211_DISCARD_MAC(vap,
2340 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
2341 ni->ni_macaddr, "ADDBA response",
2342 "BA window too large: max %d, "
2343 "received %d, tid %d code %d",
2344 bufsiz, IEEE80211_AGGR_BAWMAX, tid, code);
2345 vap->iv_stats.is_addba_badbawinsize++;
2346 return 0;
2347 }
2348 #endif
2349 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2350 "recv ADDBA response: dialogtoken %u code %d "
2351 "baparamset 0x%x (tid %d bufsiz %d) batimeout %d",
2352 dialogtoken, code, baparamset, tid, bufsiz,
2353 batimeout);
2354 ic->ic_addba_response(ni, tap, code, baparamset, batimeout);
2355 return 0;
2356 }
2357
2358 static int
2359 ht_recv_action_ba_delba(struct ieee80211_node *ni,
2360 const struct ieee80211_frame *wh,
2361 const uint8_t *frm, const uint8_t *efrm)
2362 {
2363 struct ieee80211com *ic = ni->ni_ic;
2364 struct ieee80211_rx_ampdu *rap;
2365 struct ieee80211_tx_ampdu *tap;
2366 uint16_t baparamset, code;
2367 int tid;
2368
2369 baparamset = le16dec(frm+2);
2370 code = le16dec(frm+4);
2371
2372 tid = MS(baparamset, IEEE80211_DELBAPS_TID);
2373
2374 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2375 "recv DELBA: baparamset 0x%x (tid %d initiator %d) "
2376 "code %d", baparamset, tid,
2377 MS(baparamset, IEEE80211_DELBAPS_INIT), code);
2378
2379 if ((baparamset & IEEE80211_DELBAPS_INIT) == 0) {
2380 tap = &ni->ni_tx_ampdu[tid];
2381 ic->ic_addba_stop(ni, tap);
2382 } else {
2383 rap = &ni->ni_rx_ampdu[tid];
2384 ic->ic_ampdu_rx_stop(ni, rap);
2385 }
2386 return 0;
2387 }
2388
2389 static int
2390 ht_recv_action_ht_txchwidth(struct ieee80211_node *ni,
2391 const struct ieee80211_frame *wh,
2392 const uint8_t *frm, const uint8_t *efrm)
2393 {
2394 int chw;
2395
2396 chw = (frm[2] == IEEE80211_A_HT_TXCHWIDTH_2040) ? 40 : 20;
2397
2398 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2399 "%s: HT txchwidth, width %d%s",
2400 __func__, chw, ni->ni_chw != chw ? "*" : "");
2401 if (chw != ni->ni_chw) {
2402 /* XXX does this need to change the ht40 station count? */
2403 ni->ni_chw = chw;
2404 /* XXX notify on change */
2405 }
2406 return 0;
2407 }
2408
2409 static int
2410 ht_recv_action_ht_mimopwrsave(struct ieee80211_node *ni,
2411 const struct ieee80211_frame *wh,
2412 const uint8_t *frm, const uint8_t *efrm)
2413 {
2414 const struct ieee80211_action_ht_mimopowersave *mps =
2415 (const struct ieee80211_action_ht_mimopowersave *) frm;
2416
2417 /* XXX check iv_htcaps */
2418 if (mps->am_control & IEEE80211_A_HT_MIMOPWRSAVE_ENA)
2419 ni->ni_flags |= IEEE80211_NODE_MIMO_PS;
2420 else
2421 ni->ni_flags &= ~IEEE80211_NODE_MIMO_PS;
2422 if (mps->am_control & IEEE80211_A_HT_MIMOPWRSAVE_MODE)
2423 ni->ni_flags |= IEEE80211_NODE_MIMO_RTS;
2424 else
2425 ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS;
2426 /* XXX notify on change */
2427 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2428 "%s: HT MIMO PS (%s%s)", __func__,
2429 (ni->ni_flags & IEEE80211_NODE_MIMO_PS) ? "on" : "off",
2430 (ni->ni_flags & IEEE80211_NODE_MIMO_RTS) ? "+rts" : ""
2431 );
2432 return 0;
2433 }
2434
2435 /*
2436 * Transmit processing.
2437 */
2438
2439 /*
2440 * Check if A-MPDU should be requested/enabled for a stream.
2441 * We require a traffic rate above a per-AC threshold and we
2442 * also handle backoff from previous failed attempts.
2443 *
2444 * Drivers may override this method to bring in information
2445 * such as link state conditions in making the decision.
2446 */
2447 static int
2448 ieee80211_ampdu_enable(struct ieee80211_node *ni,
2449 struct ieee80211_tx_ampdu *tap)
2450 {
2451 struct ieee80211vap *vap = ni->ni_vap;
2452
2453 if (tap->txa_avgpps <
2454 vap->iv_ampdu_mintraffic[TID_TO_WME_AC(tap->txa_tid)])
2455 return 0;
2456 /* XXX check rssi? */
2457 if (tap->txa_attempts >= ieee80211_addba_maxtries &&
2458 ieee80211_time_after(ticks, tap->txa_nextrequest)) {
2459 /*
2460 * Don't retry too often; txa_nextrequest is set
2461 * to the minimum interval we'll retry after
2462 * ieee80211_addba_maxtries failed attempts are made.
2463 */
2464 return 0;
2465 }
2466 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni,
2467 "enable AMPDU on tid %d (%s), avgpps %d pkts %d attempt %d",
2468 tap->txa_tid, ieee80211_wme_acnames[TID_TO_WME_AC(tap->txa_tid)],
2469 tap->txa_avgpps, tap->txa_pkts, tap->txa_attempts);
2470 return 1;
2471 }
2472
2473 /*
2474 * Request A-MPDU tx aggregation. Setup local state and
2475 * issue an ADDBA request. BA use will only happen after
2476 * the other end replies with ADDBA response.
2477 */
2478 int
2479 ieee80211_ampdu_request(struct ieee80211_node *ni,
2480 struct ieee80211_tx_ampdu *tap)
2481 {
2482 struct ieee80211com *ic = ni->ni_ic;
2483 uint16_t args[5];
2484 int tid, dialogtoken;
2485 static int tokens = 0; /* XXX */
2486
2487 /* XXX locking */
2488 if ((tap->txa_flags & IEEE80211_AGGR_SETUP) == 0) {
2489 /* do deferred setup of state */
2490 ampdu_tx_setup(tap);
2491 }
2492 /* XXX hack for not doing proper locking */
2493 tap->txa_flags &= ~IEEE80211_AGGR_NAK;
2494
2495 dialogtoken = (tokens+1) % 63; /* XXX */
2496 tid = tap->txa_tid;
2497
2498 /*
2499 * XXX TODO: This is racy with any other parallel TX going on. :(
2500 */
2501 tap->txa_start = ni->ni_txseqs[tid];
2502
2503 args[0] = dialogtoken;
2504 args[1] = 0; /* NB: status code not used */
2505 args[2] = IEEE80211_BAPS_POLICY_IMMEDIATE
2506 | SM(tid, IEEE80211_BAPS_TID)
2507 | SM(IEEE80211_AGGR_BAWMAX, IEEE80211_BAPS_BUFSIZ)
2508 ;
2509 args[3] = 0; /* batimeout */
2510 /* NB: do first so there's no race against reply */
2511 if (!ic->ic_addba_request(ni, tap, dialogtoken, args[2], args[3])) {
2512 /* unable to setup state, don't make request */
2513 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
2514 ni, "%s: could not setup BA stream for TID %d AC %d",
2515 __func__, tap->txa_tid, TID_TO_WME_AC(tap->txa_tid));
2516 /* defer next try so we don't slam the driver with requests */
2517 tap->txa_attempts = ieee80211_addba_maxtries;
2518 /* NB: check in case driver wants to override */
2519 if (tap->txa_nextrequest <= ticks)
2520 tap->txa_nextrequest = ticks + ieee80211_addba_backoff;
2521 return 0;
2522 }
2523 tokens = dialogtoken; /* allocate token */
2524 /* NB: after calling ic_addba_request so driver can set txa_start */
2525 args[4] = SM(tap->txa_start, IEEE80211_BASEQ_START)
2526 | SM(0, IEEE80211_BASEQ_FRAG)
2527 ;
2528 return ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA,
2529 IEEE80211_ACTION_BA_ADDBA_REQUEST, args);
2530 }
2531
2532 /*
2533 * Terminate an AMPDU tx stream. State is reclaimed
2534 * and the peer notified with a DelBA Action frame.
2535 */
2536 void
2537 ieee80211_ampdu_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap,
2538 int reason)
2539 {
2540 struct ieee80211com *ic = ni->ni_ic;
2541 struct ieee80211vap *vap = ni->ni_vap;
2542 uint16_t args[4];
2543
2544 /* XXX locking */
2545 tap->txa_flags &= ~IEEE80211_AGGR_BARPEND;
2546 if (IEEE80211_AMPDU_RUNNING(tap)) {
2547 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
2548 ni, "%s: stop BA stream for TID %d (reason: %d (%s))",
2549 __func__, tap->txa_tid, reason,
2550 ieee80211_reason_to_string(reason));
2551 vap->iv_stats.is_ampdu_stop++;
2552
2553 ic->ic_addba_stop(ni, tap);
2554 args[0] = tap->txa_tid;
2555 args[1] = IEEE80211_DELBAPS_INIT;
2556 args[2] = reason; /* XXX reason code */
2557 ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA,
2558 IEEE80211_ACTION_BA_DELBA, args);
2559 } else {
2560 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
2561 ni, "%s: BA stream for TID %d not running "
2562 "(reason: %d (%s))", __func__, tap->txa_tid, reason,
2563 ieee80211_reason_to_string(reason));
2564 vap->iv_stats.is_ampdu_stop_failed++;
2565 }
2566 }
2567
2568 /* XXX */
2569 static void bar_start_timer(struct ieee80211_tx_ampdu *tap);
2570
2571 static void
2572 bar_timeout(void *arg)
2573 {
2574 struct ieee80211_tx_ampdu *tap = arg;
2575 struct ieee80211_node *ni = tap->txa_ni;
2576
2577 KASSERT((tap->txa_flags & IEEE80211_AGGR_XCHGPEND) == 0,
2578 ("bar/addba collision, flags 0x%x", tap->txa_flags));
2579
2580 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
2581 ni, "%s: tid %u flags 0x%x attempts %d", __func__,
2582 tap->txa_tid, tap->txa_flags, tap->txa_attempts);
2583
2584 /* guard against race with bar_tx_complete */
2585 if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) == 0)
2586 return;
2587 /* XXX ? */
2588 if (tap->txa_attempts >= ieee80211_bar_maxtries) {
2589 struct ieee80211com *ic = ni->ni_ic;
2590
2591 ni->ni_vap->iv_stats.is_ampdu_bar_tx_fail++;
2592 /*
2593 * If (at least) the last BAR TX timeout was due to
2594 * an ieee80211_send_bar() failures, then we need
2595 * to make sure we notify the driver that a BAR
2596 * TX did occur and fail. This gives the driver
2597 * a chance to undo any queue pause that may
2598 * have occurred.
2599 */
2600 ic->ic_bar_response(ni, tap, 1);
2601 ieee80211_ampdu_stop(ni, tap, IEEE80211_REASON_TIMEOUT);
2602 } else {
2603 ni->ni_vap->iv_stats.is_ampdu_bar_tx_retry++;
2604 if (ieee80211_send_bar(ni, tap, tap->txa_seqpending) != 0) {
2605 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
2606 ni, "%s: failed to TX, starting timer\n",
2607 __func__);
2608 /*
2609 * If ieee80211_send_bar() fails here, the
2610 * timer may have stopped and/or the pending
2611 * flag may be clear. Because of this,
2612 * fake the BARPEND and reset the timer.
2613 * A retransmission attempt will then occur
2614 * during the next timeout.
2615 */
2616 /* XXX locking */
2617 tap->txa_flags |= IEEE80211_AGGR_BARPEND;
2618 bar_start_timer(tap);
2619 }
2620 }
2621 }
2622
2623 static void
2624 bar_start_timer(struct ieee80211_tx_ampdu *tap)
2625 {
2626 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N,
2627 tap->txa_ni,
2628 "%s: called",
2629 __func__);
2630 callout_reset(&tap->txa_timer, ieee80211_bar_timeout, bar_timeout, tap);
2631 }
2632
2633 static void
2634 bar_stop_timer(struct ieee80211_tx_ampdu *tap)
2635 {
2636 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N,
2637 tap->txa_ni,
2638 "%s: called",
2639 __func__);
2640 callout_stop(&tap->txa_timer);
2641 }
2642
2643 static void
2644 bar_tx_complete(struct ieee80211_node *ni, void *arg, int status)
2645 {
2646 struct ieee80211_tx_ampdu *tap = arg;
2647
2648 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
2649 ni, "%s: tid %u flags 0x%x pending %d status %d",
2650 __func__, tap->txa_tid, tap->txa_flags,
2651 callout_pending(&tap->txa_timer), status);
2652
2653 ni->ni_vap->iv_stats.is_ampdu_bar_tx++;
2654 /* XXX locking */
2655 if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) &&
2656 callout_pending(&tap->txa_timer)) {
2657 struct ieee80211com *ic = ni->ni_ic;
2658
2659 if (status == 0) /* ACK'd */
2660 bar_stop_timer(tap);
2661 ic->ic_bar_response(ni, tap, status);
2662 /* NB: just let timer expire so we pace requests */
2663 }
2664 }
2665
2666 static void
2667 ieee80211_bar_response(struct ieee80211_node *ni,
2668 struct ieee80211_tx_ampdu *tap, int status)
2669 {
2670
2671 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N,
2672 tap->txa_ni,
2673 "%s: called",
2674 __func__);
2675 if (status == 0) { /* got ACK */
2676 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
2677 ni, "BAR moves BA win <%u:%u> (%u frames) txseq %u tid %u",
2678 tap->txa_start,
2679 IEEE80211_SEQ_ADD(tap->txa_start, tap->txa_wnd-1),
2680 tap->txa_qframes, tap->txa_seqpending,
2681 tap->txa_tid);
2682
2683 /* NB: timer already stopped in bar_tx_complete */
2684 tap->txa_start = tap->txa_seqpending;
2685 tap->txa_flags &= ~IEEE80211_AGGR_BARPEND;
2686 }
2687 }
2688
2689 /*
2690 * Transmit a BAR frame to the specified node. The
2691 * BAR contents are drawn from the supplied aggregation
2692 * state associated with the node.
2693 *
2694 * NB: we only handle immediate ACK w/ compressed bitmap.
2695 */
2696 int
2697 ieee80211_send_bar(struct ieee80211_node *ni,
2698 struct ieee80211_tx_ampdu *tap, ieee80211_seq seq)
2699 {
2700 #define senderr(_x, _v) do { vap->iv_stats._v++; ret = _x; goto bad; } while (0)
2701 struct ieee80211vap *vap = ni->ni_vap;
2702 struct ieee80211com *ic = ni->ni_ic;
2703 struct ieee80211_frame_bar *bar;
2704 struct mbuf *m;
2705 uint16_t barctl, barseqctl;
2706 uint8_t *frm;
2707 int tid, ret;
2708
2709
2710 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N,
2711 tap->txa_ni,
2712 "%s: called",
2713 __func__);
2714
2715 if ((tap->txa_flags & IEEE80211_AGGR_RUNNING) == 0) {
2716 /* no ADDBA response, should not happen */
2717 /* XXX stat+msg */
2718 return EINVAL;
2719 }
2720 /* XXX locking */
2721 bar_stop_timer(tap);
2722
2723 ieee80211_ref_node(ni);
2724
2725 m = ieee80211_getmgtframe(&frm, ic->ic_headroom, sizeof(*bar));
2726 if (m == NULL)
2727 senderr(ENOMEM, is_tx_nobuf);
2728
2729 if (!ieee80211_add_callback(m, bar_tx_complete, tap)) {
2730 m_freem(m);
2731 senderr(ENOMEM, is_tx_nobuf); /* XXX */
2732 /* NOTREACHED */
2733 }
2734
2735 bar = mtod(m, struct ieee80211_frame_bar *);
2736 bar->i_fc[0] = IEEE80211_FC0_VERSION_0 |
2737 IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_BAR;
2738 bar->i_fc[1] = 0;
2739 IEEE80211_ADDR_COPY(bar->i_ra, ni->ni_macaddr);
2740 IEEE80211_ADDR_COPY(bar->i_ta, vap->iv_myaddr);
2741
2742 tid = tap->txa_tid;
2743 barctl = (tap->txa_flags & IEEE80211_AGGR_IMMEDIATE ?
2744 0 : IEEE80211_BAR_NOACK)
2745 | IEEE80211_BAR_COMP
2746 | SM(tid, IEEE80211_BAR_TID)
2747 ;
2748 barseqctl = SM(seq, IEEE80211_BAR_SEQ_START);
2749 /* NB: known to have proper alignment */
2750 bar->i_ctl = htole16(barctl);
2751 bar->i_seq = htole16(barseqctl);
2752 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_bar);
2753
2754 M_WME_SETAC(m, WME_AC_VO);
2755
2756 IEEE80211_NODE_STAT(ni, tx_mgmt); /* XXX tx_ctl? */
2757
2758 /* XXX locking */
2759 /* init/bump attempts counter */
2760 if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) == 0)
2761 tap->txa_attempts = 1;
2762 else
2763 tap->txa_attempts++;
2764 tap->txa_seqpending = seq;
2765 tap->txa_flags |= IEEE80211_AGGR_BARPEND;
2766
2767 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_11N,
2768 ni, "send BAR: tid %u ctl 0x%x start %u (attempt %d)",
2769 tid, barctl, seq, tap->txa_attempts);
2770
2771 /*
2772 * ic_raw_xmit will free the node reference
2773 * regardless of queue/TX success or failure.
2774 */
2775 IEEE80211_TX_LOCK(ic);
2776 ret = ieee80211_raw_output(vap, ni, m, NULL);
2777 IEEE80211_TX_UNLOCK(ic);
2778 if (ret != 0) {
2779 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_11N,
2780 ni, "send BAR: failed: (ret = %d)\n",
2781 ret);
2782 /* xmit failed, clear state flag */
2783 tap->txa_flags &= ~IEEE80211_AGGR_BARPEND;
2784 vap->iv_stats.is_ampdu_bar_tx_fail++;
2785 return ret;
2786 }
2787 /* XXX hack against tx complete happening before timer is started */
2788 if (tap->txa_flags & IEEE80211_AGGR_BARPEND)
2789 bar_start_timer(tap);
2790 return 0;
2791 bad:
2792 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N,
2793 tap->txa_ni,
2794 "%s: bad! ret=%d",
2795 __func__, ret);
2796 vap->iv_stats.is_ampdu_bar_tx_fail++;
2797 ieee80211_free_node(ni);
2798 return ret;
2799 #undef senderr
2800 }
2801
2802 static int
2803 ht_action_output(struct ieee80211_node *ni, struct mbuf *m)
2804 {
2805 struct ieee80211_bpf_params params;
2806
2807 memset(¶ms, 0, sizeof(params));
2808 params.ibp_pri = WME_AC_VO;
2809 params.ibp_rate0 = ni->ni_txparms->mgmtrate;
2810 /* NB: we know all frames are unicast */
2811 params.ibp_try0 = ni->ni_txparms->maxretry;
2812 params.ibp_power = ni->ni_txpower;
2813 return ieee80211_mgmt_output(ni, m, IEEE80211_FC0_SUBTYPE_ACTION,
2814 ¶ms);
2815 }
2816
2817 #define ADDSHORT(frm, v) do { \
2818 frm[0] = (v) & 0xff; \
2819 frm[1] = (v) >> 8; \
2820 frm += 2; \
2821 } while (0)
2822
2823 /*
2824 * Send an action management frame. The arguments are stuff
2825 * into a frame without inspection; the caller is assumed to
2826 * prepare them carefully (e.g. based on the aggregation state).
2827 */
2828 static int
2829 ht_send_action_ba_addba(struct ieee80211_node *ni,
2830 int category, int action, void *arg0)
2831 {
2832 struct ieee80211vap *vap = ni->ni_vap;
2833 struct ieee80211com *ic = ni->ni_ic;
2834 uint16_t *args = arg0;
2835 struct mbuf *m;
2836 uint8_t *frm;
2837
2838 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2839 "send ADDBA %s: dialogtoken %d status %d "
2840 "baparamset 0x%x (tid %d) batimeout 0x%x baseqctl 0x%x",
2841 (action == IEEE80211_ACTION_BA_ADDBA_REQUEST) ?
2842 "request" : "response",
2843 args[0], args[1], args[2], MS(args[2], IEEE80211_BAPS_TID),
2844 args[3], args[4]);
2845
2846 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2847 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2848 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2849 ieee80211_ref_node(ni);
2850
2851 m = ieee80211_getmgtframe(&frm,
2852 ic->ic_headroom + sizeof(struct ieee80211_frame),
2853 sizeof(uint16_t) /* action+category */
2854 /* XXX may action payload */
2855 + sizeof(struct ieee80211_action_ba_addbaresponse)
2856 );
2857 if (m != NULL) {
2858 *frm++ = category;
2859 *frm++ = action;
2860 *frm++ = args[0]; /* dialog token */
2861 if (action == IEEE80211_ACTION_BA_ADDBA_RESPONSE)
2862 ADDSHORT(frm, args[1]); /* status code */
2863 ADDSHORT(frm, args[2]); /* baparamset */
2864 ADDSHORT(frm, args[3]); /* batimeout */
2865 if (action == IEEE80211_ACTION_BA_ADDBA_REQUEST)
2866 ADDSHORT(frm, args[4]); /* baseqctl */
2867 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2868 return ht_action_output(ni, m);
2869 } else {
2870 vap->iv_stats.is_tx_nobuf++;
2871 ieee80211_free_node(ni);
2872 return ENOMEM;
2873 }
2874 }
2875
2876 static int
2877 ht_send_action_ba_delba(struct ieee80211_node *ni,
2878 int category, int action, void *arg0)
2879 {
2880 struct ieee80211vap *vap = ni->ni_vap;
2881 struct ieee80211com *ic = ni->ni_ic;
2882 uint16_t *args = arg0;
2883 struct mbuf *m;
2884 uint16_t baparamset;
2885 uint8_t *frm;
2886
2887 baparamset = SM(args[0], IEEE80211_DELBAPS_TID)
2888 | args[1]
2889 ;
2890 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2891 "send DELBA action: tid %d, initiator %d reason %d (%s)",
2892 args[0], args[1], args[2], ieee80211_reason_to_string(args[2]));
2893
2894 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2895 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2896 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2897 ieee80211_ref_node(ni);
2898
2899 m = ieee80211_getmgtframe(&frm,
2900 ic->ic_headroom + sizeof(struct ieee80211_frame),
2901 sizeof(uint16_t) /* action+category */
2902 /* XXX may action payload */
2903 + sizeof(struct ieee80211_action_ba_addbaresponse)
2904 );
2905 if (m != NULL) {
2906 *frm++ = category;
2907 *frm++ = action;
2908 ADDSHORT(frm, baparamset);
2909 ADDSHORT(frm, args[2]); /* reason code */
2910 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2911 return ht_action_output(ni, m);
2912 } else {
2913 vap->iv_stats.is_tx_nobuf++;
2914 ieee80211_free_node(ni);
2915 return ENOMEM;
2916 }
2917 }
2918
2919 static int
2920 ht_send_action_ht_txchwidth(struct ieee80211_node *ni,
2921 int category, int action, void *arg0)
2922 {
2923 struct ieee80211vap *vap = ni->ni_vap;
2924 struct ieee80211com *ic = ni->ni_ic;
2925 struct mbuf *m;
2926 uint8_t *frm;
2927
2928 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2929 "send HT txchwidth: width %d",
2930 IEEE80211_IS_CHAN_HT40(ni->ni_chan) ? 40 : 20);
2931
2932 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2933 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2934 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2935 ieee80211_ref_node(ni);
2936
2937 m = ieee80211_getmgtframe(&frm,
2938 ic->ic_headroom + sizeof(struct ieee80211_frame),
2939 sizeof(uint16_t) /* action+category */
2940 /* XXX may action payload */
2941 + sizeof(struct ieee80211_action_ba_addbaresponse)
2942 );
2943 if (m != NULL) {
2944 *frm++ = category;
2945 *frm++ = action;
2946 *frm++ = IEEE80211_IS_CHAN_HT40(ni->ni_chan) ?
2947 IEEE80211_A_HT_TXCHWIDTH_2040 :
2948 IEEE80211_A_HT_TXCHWIDTH_20;
2949 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2950 return ht_action_output(ni, m);
2951 } else {
2952 vap->iv_stats.is_tx_nobuf++;
2953 ieee80211_free_node(ni);
2954 return ENOMEM;
2955 }
2956 }
2957 #undef ADDSHORT
2958
2959 /*
2960 * Construct the MCS bit mask for inclusion in an HT capabilities
2961 * information element.
2962 */
2963 static void
2964 ieee80211_set_mcsset(struct ieee80211com *ic, uint8_t *frm)
2965 {
2966 int i;
2967 uint8_t txparams;
2968
2969 KASSERT((ic->ic_rxstream > 0 && ic->ic_rxstream <= 4),
2970 ("ic_rxstream %d out of range", ic->ic_rxstream));
2971 KASSERT((ic->ic_txstream > 0 && ic->ic_txstream <= 4),
2972 ("ic_txstream %d out of range", ic->ic_txstream));
2973
2974 for (i = 0; i < ic->ic_rxstream * 8; i++)
2975 setbit(frm, i);
2976 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) &&
2977 (ic->ic_htcaps & IEEE80211_HTC_RXMCS32))
2978 setbit(frm, 32);
2979 if (ic->ic_htcaps & IEEE80211_HTC_RXUNEQUAL) {
2980 if (ic->ic_rxstream >= 2) {
2981 for (i = 33; i <= 38; i++)
2982 setbit(frm, i);
2983 }
2984 if (ic->ic_rxstream >= 3) {
2985 for (i = 39; i <= 52; i++)
2986 setbit(frm, i);
2987 }
2988 if (ic->ic_txstream >= 4) {
2989 for (i = 53; i <= 76; i++)
2990 setbit(frm, i);
2991 }
2992 }
2993
2994 if (ic->ic_rxstream != ic->ic_txstream) {
2995 txparams = 0x1; /* TX MCS set defined */
2996 txparams |= 0x2; /* TX RX MCS not equal */
2997 txparams |= (ic->ic_txstream - 1) << 2; /* num TX streams */
2998 if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL)
2999 txparams |= 0x16; /* TX unequal modulation sup */
3000 } else
3001 txparams = 0;
3002 frm[12] = txparams;
3003 }
3004
3005 /*
3006 * Add body of an HTCAP information element.
3007 */
3008 static uint8_t *
3009 ieee80211_add_htcap_body(uint8_t *frm, struct ieee80211_node *ni)
3010 {
3011 #define ADDSHORT(frm, v) do { \
3012 frm[0] = (v) & 0xff; \
3013 frm[1] = (v) >> 8; \
3014 frm += 2; \
3015 } while (0)
3016 struct ieee80211com *ic = ni->ni_ic;
3017 struct ieee80211vap *vap = ni->ni_vap;
3018 uint16_t caps, extcaps;
3019 int rxmax, density;
3020
3021 /* HT capabilities */
3022 caps = vap->iv_htcaps & 0xffff;
3023 /*
3024 * Note channel width depends on whether we are operating as
3025 * a sta or not. When operating as a sta we are generating
3026 * a request based on our desired configuration. Otherwise
3027 * we are operational and the channel attributes identify
3028 * how we've been setup (which might be different if a fixed
3029 * channel is specified).
3030 */
3031 if (vap->iv_opmode == IEEE80211_M_STA) {
3032 /* override 20/40 use based on config */
3033 if (vap->iv_flags_ht & IEEE80211_FHT_USEHT40)
3034 caps |= IEEE80211_HTCAP_CHWIDTH40;
3035 else
3036 caps &= ~IEEE80211_HTCAP_CHWIDTH40;
3037
3038 /* Start by using the advertised settings */
3039 rxmax = MS(ni->ni_htparam, IEEE80211_HTCAP_MAXRXAMPDU);
3040 density = MS(ni->ni_htparam, IEEE80211_HTCAP_MPDUDENSITY);
3041
3042 IEEE80211_DPRINTF(vap, IEEE80211_MSG_11N,
3043 "%s: advertised rxmax=%d, density=%d, vap rxmax=%d, density=%d\n",
3044 __func__,
3045 rxmax,
3046 density,
3047 vap->iv_ampdu_rxmax,
3048 vap->iv_ampdu_density);
3049
3050 /* Cap at VAP rxmax */
3051 if (rxmax > vap->iv_ampdu_rxmax)
3052 rxmax = vap->iv_ampdu_rxmax;
3053
3054 /*
3055 * If the VAP ampdu density value greater, use that.
3056 *
3057 * (Larger density value == larger minimum gap between A-MPDU
3058 * subframes.)
3059 */
3060 if (vap->iv_ampdu_density > density)
3061 density = vap->iv_ampdu_density;
3062
3063 /*
3064 * NB: Hardware might support HT40 on some but not all
3065 * channels. We can't determine this earlier because only
3066 * after association the channel is upgraded to HT based
3067 * on the negotiated capabilities.
3068 */
3069 if (ni->ni_chan != IEEE80211_CHAN_ANYC &&
3070 findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT40U) == NULL &&
3071 findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT40D) == NULL)
3072 caps &= ~IEEE80211_HTCAP_CHWIDTH40;
3073 } else {
3074 /* override 20/40 use based on current channel */
3075 if (IEEE80211_IS_CHAN_HT40(ni->ni_chan))
3076 caps |= IEEE80211_HTCAP_CHWIDTH40;
3077 else
3078 caps &= ~IEEE80211_HTCAP_CHWIDTH40;
3079
3080 /* XXX TODO should it start by using advertised settings? */
3081 rxmax = vap->iv_ampdu_rxmax;
3082 density = vap->iv_ampdu_density;
3083 }
3084
3085 /* adjust short GI based on channel and config */
3086 if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20) == 0)
3087 caps &= ~IEEE80211_HTCAP_SHORTGI20;
3088 if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40) == 0 ||
3089 (caps & IEEE80211_HTCAP_CHWIDTH40) == 0)
3090 caps &= ~IEEE80211_HTCAP_SHORTGI40;
3091
3092 /* adjust STBC based on receive capabilities */
3093 if ((vap->iv_flags_ht & IEEE80211_FHT_STBC_RX) == 0)
3094 caps &= ~IEEE80211_HTCAP_RXSTBC;
3095
3096 /* adjust LDPC based on receive capabilites */
3097 if ((vap->iv_flags_ht & IEEE80211_FHT_LDPC_RX) == 0)
3098 caps &= ~IEEE80211_HTCAP_LDPC;
3099
3100 ADDSHORT(frm, caps);
3101
3102 /* HT parameters */
3103 *frm = SM(rxmax, IEEE80211_HTCAP_MAXRXAMPDU)
3104 | SM(density, IEEE80211_HTCAP_MPDUDENSITY)
3105 ;
3106 frm++;
3107
3108 /* pre-zero remainder of ie */
3109 memset(frm, 0, sizeof(struct ieee80211_ie_htcap) -
3110 __offsetof(struct ieee80211_ie_htcap, hc_mcsset));
3111
3112 /* supported MCS set */
3113 /*
3114 * XXX: For sta mode the rate set should be restricted based
3115 * on the AP's capabilities, but ni_htrates isn't setup when
3116 * we're called to form an AssocReq frame so for now we're
3117 * restricted to the device capabilities.
3118 */
3119 ieee80211_set_mcsset(ni->ni_ic, frm);
3120
3121 frm += __offsetof(struct ieee80211_ie_htcap, hc_extcap) -
3122 __offsetof(struct ieee80211_ie_htcap, hc_mcsset);
3123
3124 /* HT extended capabilities */
3125 extcaps = vap->iv_htextcaps & 0xffff;
3126
3127 ADDSHORT(frm, extcaps);
3128
3129 frm += sizeof(struct ieee80211_ie_htcap) -
3130 __offsetof(struct ieee80211_ie_htcap, hc_txbf);
3131
3132 return frm;
3133 #undef ADDSHORT
3134 }
3135
3136 /*
3137 * Add 802.11n HT capabilities information element
3138 */
3139 uint8_t *
3140 ieee80211_add_htcap(uint8_t *frm, struct ieee80211_node *ni)
3141 {
3142 frm[0] = IEEE80211_ELEMID_HTCAP;
3143 frm[1] = sizeof(struct ieee80211_ie_htcap) - 2;
3144 return ieee80211_add_htcap_body(frm + 2, ni);
3145 }
3146
3147 /*
3148 * Non-associated probe request - add HT capabilities based on
3149 * the current channel configuration.
3150 */
3151 static uint8_t *
3152 ieee80211_add_htcap_body_ch(uint8_t *frm, struct ieee80211vap *vap,
3153 struct ieee80211_channel *c)
3154 {
3155 #define ADDSHORT(frm, v) do { \
3156 frm[0] = (v) & 0xff; \
3157 frm[1] = (v) >> 8; \
3158 frm += 2; \
3159 } while (0)
3160 struct ieee80211com *ic = vap->iv_ic;
3161 uint16_t caps, extcaps;
3162 int rxmax, density;
3163
3164 /* HT capabilities */
3165 caps = vap->iv_htcaps & 0xffff;
3166
3167 /*
3168 * We don't use this in STA mode; only in IBSS mode.
3169 * So in IBSS mode we base our HTCAP flags on the
3170 * given channel.
3171 */
3172
3173 /* override 20/40 use based on current channel */
3174 if (IEEE80211_IS_CHAN_HT40(c))
3175 caps |= IEEE80211_HTCAP_CHWIDTH40;
3176 else
3177 caps &= ~IEEE80211_HTCAP_CHWIDTH40;
3178
3179 /* Use the currently configured values */
3180 rxmax = vap->iv_ampdu_rxmax;
3181 density = vap->iv_ampdu_density;
3182
3183 /* adjust short GI based on channel and config */
3184 if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20) == 0)
3185 caps &= ~IEEE80211_HTCAP_SHORTGI20;
3186 if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40) == 0 ||
3187 (caps & IEEE80211_HTCAP_CHWIDTH40) == 0)
3188 caps &= ~IEEE80211_HTCAP_SHORTGI40;
3189 ADDSHORT(frm, caps);
3190
3191 /* HT parameters */
3192 *frm = SM(rxmax, IEEE80211_HTCAP_MAXRXAMPDU)
3193 | SM(density, IEEE80211_HTCAP_MPDUDENSITY)
3194 ;
3195 frm++;
3196
3197 /* pre-zero remainder of ie */
3198 memset(frm, 0, sizeof(struct ieee80211_ie_htcap) -
3199 __offsetof(struct ieee80211_ie_htcap, hc_mcsset));
3200
3201 /* supported MCS set */
3202 /*
3203 * XXX: For sta mode the rate set should be restricted based
3204 * on the AP's capabilities, but ni_htrates isn't setup when
3205 * we're called to form an AssocReq frame so for now we're
3206 * restricted to the device capabilities.
3207 */
3208 ieee80211_set_mcsset(ic, frm);
3209
3210 frm += __offsetof(struct ieee80211_ie_htcap, hc_extcap) -
3211 __offsetof(struct ieee80211_ie_htcap, hc_mcsset);
3212
3213 /* HT extended capabilities */
3214 extcaps = vap->iv_htextcaps & 0xffff;
3215
3216 ADDSHORT(frm, extcaps);
3217
3218 frm += sizeof(struct ieee80211_ie_htcap) -
3219 __offsetof(struct ieee80211_ie_htcap, hc_txbf);
3220
3221 return frm;
3222 #undef ADDSHORT
3223 }
3224
3225 /*
3226 * Add 802.11n HT capabilities information element
3227 */
3228 uint8_t *
3229 ieee80211_add_htcap_ch(uint8_t *frm, struct ieee80211vap *vap,
3230 struct ieee80211_channel *c)
3231 {
3232 frm[0] = IEEE80211_ELEMID_HTCAP;
3233 frm[1] = sizeof(struct ieee80211_ie_htcap) - 2;
3234 return ieee80211_add_htcap_body_ch(frm + 2, vap, c);
3235 }
3236
3237 /*
3238 * Add Broadcom OUI wrapped standard HTCAP ie; this is
3239 * used for compatibility w/ pre-draft implementations.
3240 */
3241 uint8_t *
3242 ieee80211_add_htcap_vendor(uint8_t *frm, struct ieee80211_node *ni)
3243 {
3244 frm[0] = IEEE80211_ELEMID_VENDOR;
3245 frm[1] = 4 + sizeof(struct ieee80211_ie_htcap) - 2;
3246 frm[2] = (BCM_OUI >> 0) & 0xff;
3247 frm[3] = (BCM_OUI >> 8) & 0xff;
3248 frm[4] = (BCM_OUI >> 16) & 0xff;
3249 frm[5] = BCM_OUI_HTCAP;
3250 return ieee80211_add_htcap_body(frm + 6, ni);
3251 }
3252
3253 /*
3254 * Construct the MCS bit mask of basic rates
3255 * for inclusion in an HT information element.
3256 */
3257 static void
3258 ieee80211_set_basic_htrates(uint8_t *frm, const struct ieee80211_htrateset *rs)
3259 {
3260 int i;
3261
3262 for (i = 0; i < rs->rs_nrates; i++) {
3263 int r = rs->rs_rates[i] & IEEE80211_RATE_VAL;
3264 if ((rs->rs_rates[i] & IEEE80211_RATE_BASIC) &&
3265 r < IEEE80211_HTRATE_MAXSIZE) {
3266 /* NB: this assumes a particular implementation */
3267 setbit(frm, r);
3268 }
3269 }
3270 }
3271
3272 /*
3273 * Update the HTINFO ie for a beacon frame.
3274 */
3275 void
3276 ieee80211_ht_update_beacon(struct ieee80211vap *vap,
3277 struct ieee80211_beacon_offsets *bo)
3278 {
3279 #define PROTMODE (IEEE80211_HTINFO_OPMODE|IEEE80211_HTINFO_NONHT_PRESENT)
3280 struct ieee80211_node *ni;
3281 const struct ieee80211_channel *bsschan;
3282 struct ieee80211com *ic = vap->iv_ic;
3283 struct ieee80211_ie_htinfo *ht =
3284 (struct ieee80211_ie_htinfo *) bo->bo_htinfo;
3285
3286 ni = ieee80211_ref_node(vap->iv_bss);
3287 bsschan = ni->ni_chan;
3288
3289 /* XXX only update on channel change */
3290 ht->hi_ctrlchannel = ieee80211_chan2ieee(ic, bsschan);
3291 if (vap->iv_flags_ht & IEEE80211_FHT_RIFS)
3292 ht->hi_byte1 = IEEE80211_HTINFO_RIFSMODE_PERM;
3293 else
3294 ht->hi_byte1 = IEEE80211_HTINFO_RIFSMODE_PROH;
3295 if (IEEE80211_IS_CHAN_HT40U(bsschan))
3296 ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_ABOVE;
3297 else if (IEEE80211_IS_CHAN_HT40D(bsschan))
3298 ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_BELOW;
3299 else
3300 ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_NONE;
3301 if (IEEE80211_IS_CHAN_HT40(bsschan))
3302 ht->hi_byte1 |= IEEE80211_HTINFO_TXWIDTH_2040;
3303
3304 /* protection mode */
3305 ht->hi_byte2 = (ht->hi_byte2 &~ PROTMODE) | ic->ic_curhtprotmode;
3306
3307 ieee80211_free_node(ni);
3308
3309 /* XXX propagate to vendor ie's */
3310 #undef PROTMODE
3311 }
3312
3313 /*
3314 * Add body of an HTINFO information element.
3315 *
3316 * NB: We don't use struct ieee80211_ie_htinfo because we can
3317 * be called to fillin both a standard ie and a compat ie that
3318 * has a vendor OUI at the front.
3319 */
3320 static uint8_t *
3321 ieee80211_add_htinfo_body(uint8_t *frm, struct ieee80211_node *ni)
3322 {
3323 struct ieee80211vap *vap = ni->ni_vap;
3324 struct ieee80211com *ic = ni->ni_ic;
3325
3326 /* pre-zero remainder of ie */
3327 memset(frm, 0, sizeof(struct ieee80211_ie_htinfo) - 2);
3328
3329 /* primary/control channel center */
3330 *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan);
3331
3332 if (vap->iv_flags_ht & IEEE80211_FHT_RIFS)
3333 frm[0] = IEEE80211_HTINFO_RIFSMODE_PERM;
3334 else
3335 frm[0] = IEEE80211_HTINFO_RIFSMODE_PROH;
3336 if (IEEE80211_IS_CHAN_HT40U(ni->ni_chan))
3337 frm[0] |= IEEE80211_HTINFO_2NDCHAN_ABOVE;
3338 else if (IEEE80211_IS_CHAN_HT40D(ni->ni_chan))
3339 frm[0] |= IEEE80211_HTINFO_2NDCHAN_BELOW;
3340 else
3341 frm[0] |= IEEE80211_HTINFO_2NDCHAN_NONE;
3342 if (IEEE80211_IS_CHAN_HT40(ni->ni_chan))
3343 frm[0] |= IEEE80211_HTINFO_TXWIDTH_2040;
3344
3345 frm[1] = ic->ic_curhtprotmode;
3346
3347 frm += 5;
3348
3349 /* basic MCS set */
3350 ieee80211_set_basic_htrates(frm, &ni->ni_htrates);
3351 frm += sizeof(struct ieee80211_ie_htinfo) -
3352 __offsetof(struct ieee80211_ie_htinfo, hi_basicmcsset);
3353 return frm;
3354 }
3355
3356 /*
3357 * Add 802.11n HT information element.
3358 */
3359 uint8_t *
3360 ieee80211_add_htinfo(uint8_t *frm, struct ieee80211_node *ni)
3361 {
3362 frm[0] = IEEE80211_ELEMID_HTINFO;
3363 frm[1] = sizeof(struct ieee80211_ie_htinfo) - 2;
3364 return ieee80211_add_htinfo_body(frm + 2, ni);
3365 }
3366
3367 /*
3368 * Add Broadcom OUI wrapped standard HTINFO ie; this is
3369 * used for compatibility w/ pre-draft implementations.
3370 */
3371 uint8_t *
3372 ieee80211_add_htinfo_vendor(uint8_t *frm, struct ieee80211_node *ni)
3373 {
3374 frm[0] = IEEE80211_ELEMID_VENDOR;
3375 frm[1] = 4 + sizeof(struct ieee80211_ie_htinfo) - 2;
3376 frm[2] = (BCM_OUI >> 0) & 0xff;
3377 frm[3] = (BCM_OUI >> 8) & 0xff;
3378 frm[4] = (BCM_OUI >> 16) & 0xff;
3379 frm[5] = BCM_OUI_HTINFO;
3380 return ieee80211_add_htinfo_body(frm + 6, ni);
3381 }
Cache object: b9bf2433d29b6b1aa7b034c3b09d3fcc
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