2 * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
32 * IEEE 802.11n protocol support.
38 #include <sys/param.h>
39 #include <sys/kernel.h>
40 #include <sys/systm.h>
41 #include <sys/endian.h>
43 #include <sys/socket.h>
46 #include <net/if_var.h>
47 #include <net/if_media.h>
48 #include <net/ethernet.h>
50 #include <net80211/ieee80211_var.h>
51 #include <net80211/ieee80211_action.h>
52 #include <net80211/ieee80211_input.h>
54 /* define here, used throughout file */
55 #define MS(_v, _f) (((_v) & _f) >> _f##_S)
56 #define SM(_v, _f) (((_v) << _f##_S) & _f)
58 const struct ieee80211_mcs_rates ieee80211_htrates[IEEE80211_HTRATE_MAXSIZE] = {
59 { 13, 14, 27, 30 }, /* MCS 0 */
60 { 26, 29, 54, 60 }, /* MCS 1 */
61 { 39, 43, 81, 90 }, /* MCS 2 */
62 { 52, 58, 108, 120 }, /* MCS 3 */
63 { 78, 87, 162, 180 }, /* MCS 4 */
64 { 104, 116, 216, 240 }, /* MCS 5 */
65 { 117, 130, 243, 270 }, /* MCS 6 */
66 { 130, 144, 270, 300 }, /* MCS 7 */
67 { 26, 29, 54, 60 }, /* MCS 8 */
68 { 52, 58, 108, 120 }, /* MCS 9 */
69 { 78, 87, 162, 180 }, /* MCS 10 */
70 { 104, 116, 216, 240 }, /* MCS 11 */
71 { 156, 173, 324, 360 }, /* MCS 12 */
72 { 208, 231, 432, 480 }, /* MCS 13 */
73 { 234, 260, 486, 540 }, /* MCS 14 */
74 { 260, 289, 540, 600 }, /* MCS 15 */
75 { 39, 43, 81, 90 }, /* MCS 16 */
76 { 78, 87, 162, 180 }, /* MCS 17 */
77 { 117, 130, 243, 270 }, /* MCS 18 */
78 { 156, 173, 324, 360 }, /* MCS 19 */
79 { 234, 260, 486, 540 }, /* MCS 20 */
80 { 312, 347, 648, 720 }, /* MCS 21 */
81 { 351, 390, 729, 810 }, /* MCS 22 */
82 { 390, 433, 810, 900 }, /* MCS 23 */
83 { 52, 58, 108, 120 }, /* MCS 24 */
84 { 104, 116, 216, 240 }, /* MCS 25 */
85 { 156, 173, 324, 360 }, /* MCS 26 */
86 { 208, 231, 432, 480 }, /* MCS 27 */
87 { 312, 347, 648, 720 }, /* MCS 28 */
88 { 416, 462, 864, 960 }, /* MCS 29 */
89 { 468, 520, 972, 1080 }, /* MCS 30 */
90 { 520, 578, 1080, 1200 }, /* MCS 31 */
91 { 0, 0, 12, 13 }, /* MCS 32 */
92 { 78, 87, 162, 180 }, /* MCS 33 */
93 { 104, 116, 216, 240 }, /* MCS 34 */
94 { 130, 144, 270, 300 }, /* MCS 35 */
95 { 117, 130, 243, 270 }, /* MCS 36 */
96 { 156, 173, 324, 360 }, /* MCS 37 */
97 { 195, 217, 405, 450 }, /* MCS 38 */
98 { 104, 116, 216, 240 }, /* MCS 39 */
99 { 130, 144, 270, 300 }, /* MCS 40 */
100 { 130, 144, 270, 300 }, /* MCS 41 */
101 { 156, 173, 324, 360 }, /* MCS 42 */
102 { 182, 202, 378, 420 }, /* MCS 43 */
103 { 182, 202, 378, 420 }, /* MCS 44 */
104 { 208, 231, 432, 480 }, /* MCS 45 */
105 { 156, 173, 324, 360 }, /* MCS 46 */
106 { 195, 217, 405, 450 }, /* MCS 47 */
107 { 195, 217, 405, 450 }, /* MCS 48 */
108 { 234, 260, 486, 540 }, /* MCS 49 */
109 { 273, 303, 567, 630 }, /* MCS 50 */
110 { 273, 303, 567, 630 }, /* MCS 51 */
111 { 312, 347, 648, 720 }, /* MCS 52 */
112 { 130, 144, 270, 300 }, /* MCS 53 */
113 { 156, 173, 324, 360 }, /* MCS 54 */
114 { 182, 202, 378, 420 }, /* MCS 55 */
115 { 156, 173, 324, 360 }, /* MCS 56 */
116 { 182, 202, 378, 420 }, /* MCS 57 */
117 { 208, 231, 432, 480 }, /* MCS 58 */
118 { 234, 260, 486, 540 }, /* MCS 59 */
119 { 208, 231, 432, 480 }, /* MCS 60 */
120 { 234, 260, 486, 540 }, /* MCS 61 */
121 { 260, 289, 540, 600 }, /* MCS 62 */
122 { 260, 289, 540, 600 }, /* MCS 63 */
123 { 286, 318, 594, 660 }, /* MCS 64 */
124 { 195, 217, 405, 450 }, /* MCS 65 */
125 { 234, 260, 486, 540 }, /* MCS 66 */
126 { 273, 303, 567, 630 }, /* MCS 67 */
127 { 234, 260, 486, 540 }, /* MCS 68 */
128 { 273, 303, 567, 630 }, /* MCS 69 */
129 { 312, 347, 648, 720 }, /* MCS 70 */
130 { 351, 390, 729, 810 }, /* MCS 71 */
131 { 312, 347, 648, 720 }, /* MCS 72 */
132 { 351, 390, 729, 810 }, /* MCS 73 */
133 { 390, 433, 810, 900 }, /* MCS 74 */
134 { 390, 433, 810, 900 }, /* MCS 75 */
135 { 429, 477, 891, 990 }, /* MCS 76 */
138 #ifdef IEEE80211_AMPDU_AGE
139 static int ieee80211_ampdu_age = -1; /* threshold for ampdu reorder q (ms) */
140 SYSCTL_PROC(_net_wlan, OID_AUTO, ampdu_age, CTLTYPE_INT | CTLFLAG_RW,
141 &ieee80211_ampdu_age, 0, ieee80211_sysctl_msecs_ticks, "I",
142 "AMPDU max reorder age (ms)");
145 static int ieee80211_recv_bar_ena = 1;
146 SYSCTL_INT(_net_wlan, OID_AUTO, recv_bar, CTLFLAG_RW, &ieee80211_recv_bar_ena,
147 0, "BAR frame processing (ena/dis)");
149 static int ieee80211_addba_timeout = -1;/* timeout for ADDBA response */
150 SYSCTL_PROC(_net_wlan, OID_AUTO, addba_timeout, CTLTYPE_INT | CTLFLAG_RW,
151 &ieee80211_addba_timeout, 0, ieee80211_sysctl_msecs_ticks, "I",
152 "ADDBA request timeout (ms)");
153 static int ieee80211_addba_backoff = -1;/* backoff after max ADDBA requests */
154 SYSCTL_PROC(_net_wlan, OID_AUTO, addba_backoff, CTLTYPE_INT | CTLFLAG_RW,
155 &ieee80211_addba_backoff, 0, ieee80211_sysctl_msecs_ticks, "I",
156 "ADDBA request backoff (ms)");
157 static int ieee80211_addba_maxtries = 3;/* max ADDBA requests before backoff */
158 SYSCTL_INT(_net_wlan, OID_AUTO, addba_maxtries, CTLFLAG_RW,
159 &ieee80211_addba_maxtries, 0, "max ADDBA requests sent before backoff");
161 static int ieee80211_bar_timeout = -1; /* timeout waiting for BAR response */
162 static int ieee80211_bar_maxtries = 50;/* max BAR requests before DELBA */
164 static ieee80211_recv_action_func ht_recv_action_ba_addba_request;
165 static ieee80211_recv_action_func ht_recv_action_ba_addba_response;
166 static ieee80211_recv_action_func ht_recv_action_ba_delba;
167 static ieee80211_recv_action_func ht_recv_action_ht_mimopwrsave;
168 static ieee80211_recv_action_func ht_recv_action_ht_txchwidth;
170 static ieee80211_send_action_func ht_send_action_ba_addba;
171 static ieee80211_send_action_func ht_send_action_ba_delba;
172 static ieee80211_send_action_func ht_send_action_ht_txchwidth;
175 ieee80211_ht_init(void)
178 * Setup HT parameters that depends on the clock frequency.
180 #ifdef IEEE80211_AMPDU_AGE
181 ieee80211_ampdu_age = msecs_to_ticks(500);
183 ieee80211_addba_timeout = msecs_to_ticks(250);
184 ieee80211_addba_backoff = msecs_to_ticks(10*1000);
185 ieee80211_bar_timeout = msecs_to_ticks(250);
187 * Register action frame handlers.
189 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA,
190 IEEE80211_ACTION_BA_ADDBA_REQUEST, ht_recv_action_ba_addba_request);
191 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA,
192 IEEE80211_ACTION_BA_ADDBA_RESPONSE, ht_recv_action_ba_addba_response);
193 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA,
194 IEEE80211_ACTION_BA_DELBA, ht_recv_action_ba_delba);
195 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_HT,
196 IEEE80211_ACTION_HT_MIMOPWRSAVE, ht_recv_action_ht_mimopwrsave);
197 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_HT,
198 IEEE80211_ACTION_HT_TXCHWIDTH, ht_recv_action_ht_txchwidth);
200 ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA,
201 IEEE80211_ACTION_BA_ADDBA_REQUEST, ht_send_action_ba_addba);
202 ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA,
203 IEEE80211_ACTION_BA_ADDBA_RESPONSE, ht_send_action_ba_addba);
204 ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA,
205 IEEE80211_ACTION_BA_DELBA, ht_send_action_ba_delba);
206 ieee80211_send_action_register(IEEE80211_ACTION_CAT_HT,
207 IEEE80211_ACTION_HT_TXCHWIDTH, ht_send_action_ht_txchwidth);
209 SYSINIT(wlan_ht, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_ht_init, NULL);
211 static int ieee80211_ampdu_enable(struct ieee80211_node *ni,
212 struct ieee80211_tx_ampdu *tap);
213 static int ieee80211_addba_request(struct ieee80211_node *ni,
214 struct ieee80211_tx_ampdu *tap,
215 int dialogtoken, int baparamset, int batimeout);
216 static int ieee80211_addba_response(struct ieee80211_node *ni,
217 struct ieee80211_tx_ampdu *tap,
218 int code, int baparamset, int batimeout);
219 static void ieee80211_addba_stop(struct ieee80211_node *ni,
220 struct ieee80211_tx_ampdu *tap);
221 static void null_addba_response_timeout(struct ieee80211_node *ni,
222 struct ieee80211_tx_ampdu *tap);
224 static void ieee80211_bar_response(struct ieee80211_node *ni,
225 struct ieee80211_tx_ampdu *tap, int status);
226 static void ampdu_tx_stop(struct ieee80211_tx_ampdu *tap);
227 static void bar_stop_timer(struct ieee80211_tx_ampdu *tap);
228 static int ampdu_rx_start(struct ieee80211_node *, struct ieee80211_rx_ampdu *,
229 int baparamset, int batimeout, int baseqctl);
230 static void ampdu_rx_stop(struct ieee80211_node *, struct ieee80211_rx_ampdu *);
233 ieee80211_ht_attach(struct ieee80211com *ic)
235 /* setup default aggregation policy */
236 ic->ic_recv_action = ieee80211_recv_action;
237 ic->ic_send_action = ieee80211_send_action;
238 ic->ic_ampdu_enable = ieee80211_ampdu_enable;
239 ic->ic_addba_request = ieee80211_addba_request;
240 ic->ic_addba_response = ieee80211_addba_response;
241 ic->ic_addba_response_timeout = null_addba_response_timeout;
242 ic->ic_addba_stop = ieee80211_addba_stop;
243 ic->ic_bar_response = ieee80211_bar_response;
244 ic->ic_ampdu_rx_start = ampdu_rx_start;
245 ic->ic_ampdu_rx_stop = ampdu_rx_stop;
247 ic->ic_htprotmode = IEEE80211_PROT_RTSCTS;
248 ic->ic_curhtprotmode = IEEE80211_HTINFO_OPMODE_PURE;
252 ieee80211_ht_detach(struct ieee80211com *ic)
257 ieee80211_ht_vattach(struct ieee80211vap *vap)
260 /* driver can override defaults */
261 vap->iv_ampdu_rxmax = IEEE80211_HTCAP_MAXRXAMPDU_8K;
262 vap->iv_ampdu_density = IEEE80211_HTCAP_MPDUDENSITY_NA;
263 vap->iv_ampdu_limit = vap->iv_ampdu_rxmax;
264 vap->iv_amsdu_limit = vap->iv_htcaps & IEEE80211_HTCAP_MAXAMSDU;
265 /* tx aggregation traffic thresholds */
266 vap->iv_ampdu_mintraffic[WME_AC_BK] = 128;
267 vap->iv_ampdu_mintraffic[WME_AC_BE] = 64;
268 vap->iv_ampdu_mintraffic[WME_AC_VO] = 32;
269 vap->iv_ampdu_mintraffic[WME_AC_VI] = 32;
271 if (vap->iv_htcaps & IEEE80211_HTC_HT) {
273 * Device is HT capable; enable all HT-related
274 * facilities by default.
275 * XXX these choices may be too aggressive.
277 vap->iv_flags_ht |= IEEE80211_FHT_HT
278 | IEEE80211_FHT_HTCOMPAT
280 if (vap->iv_htcaps & IEEE80211_HTCAP_SHORTGI20)
281 vap->iv_flags_ht |= IEEE80211_FHT_SHORTGI20;
282 /* XXX infer from channel list? */
283 if (vap->iv_htcaps & IEEE80211_HTCAP_CHWIDTH40) {
284 vap->iv_flags_ht |= IEEE80211_FHT_USEHT40;
285 if (vap->iv_htcaps & IEEE80211_HTCAP_SHORTGI40)
286 vap->iv_flags_ht |= IEEE80211_FHT_SHORTGI40;
288 /* enable RIFS if capable */
289 if (vap->iv_htcaps & IEEE80211_HTC_RIFS)
290 vap->iv_flags_ht |= IEEE80211_FHT_RIFS;
292 /* NB: A-MPDU and A-MSDU rx are mandated, these are tx only */
293 vap->iv_flags_ht |= IEEE80211_FHT_AMPDU_RX;
294 if (vap->iv_htcaps & IEEE80211_HTC_AMPDU)
295 vap->iv_flags_ht |= IEEE80211_FHT_AMPDU_TX;
296 vap->iv_flags_ht |= IEEE80211_FHT_AMSDU_RX;
297 if (vap->iv_htcaps & IEEE80211_HTC_AMSDU)
298 vap->iv_flags_ht |= IEEE80211_FHT_AMSDU_TX;
300 /* NB: disable default legacy WDS, too many issues right now */
301 if (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY)
302 vap->iv_flags_ht &= ~IEEE80211_FHT_HT;
306 ieee80211_ht_vdetach(struct ieee80211vap *vap)
311 ht_getrate(struct ieee80211com *ic, int index, enum ieee80211_phymode mode,
316 mword = ieee80211_rate2media(ic, index | IEEE80211_RATE_MCS, mode);
317 if (IFM_SUBTYPE(mword) != IFM_IEEE80211_MCS)
321 rate = ieee80211_htrates[index].ht20_rate_800ns;
324 rate = ieee80211_htrates[index].ht20_rate_400ns;
327 rate = ieee80211_htrates[index].ht40_rate_800ns;
330 rate = ieee80211_htrates[index].ht40_rate_400ns;
336 static struct printranges {
347 { 32, 0, 1, 2, IEEE80211_HTC_TXMCS32 },
348 { 33, 38, 2, 0, IEEE80211_HTC_TXUNEQUAL },
349 { 39, 52, 3, 0, IEEE80211_HTC_TXUNEQUAL },
350 { 53, 76, 4, 0, IEEE80211_HTC_TXUNEQUAL },
355 ht_rateprint(struct ieee80211com *ic, enum ieee80211_phymode mode, int ratetype)
357 int minrate, maxrate;
358 struct printranges *range;
360 for (range = ranges; range->txstream != 0; range++) {
361 if (ic->ic_txstream < range->txstream)
363 if (range->htcapflags &&
364 (ic->ic_htcaps & range->htcapflags) == 0)
366 if (ratetype < range->ratetype)
368 minrate = ht_getrate(ic, range->minmcs, mode, ratetype);
369 maxrate = ht_getrate(ic, range->maxmcs, mode, ratetype);
371 ic_printf(ic, "MCS %d-%d: %d%sMbps - %d%sMbps\n",
372 range->minmcs, range->maxmcs,
373 minrate/2, ((minrate & 0x1) != 0 ? ".5" : ""),
374 maxrate/2, ((maxrate & 0x1) != 0 ? ".5" : ""));
376 ic_printf(ic, "MCS %d: %d%sMbps\n", range->minmcs,
377 minrate/2, ((minrate & 0x1) != 0 ? ".5" : ""));
383 ht_announce(struct ieee80211com *ic, enum ieee80211_phymode mode)
385 const char *modestr = ieee80211_phymode_name[mode];
387 ic_printf(ic, "%s MCS 20MHz\n", modestr);
388 ht_rateprint(ic, mode, 0);
389 if (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20) {
390 ic_printf(ic, "%s MCS 20MHz SGI\n", modestr);
391 ht_rateprint(ic, mode, 1);
393 if (ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) {
394 ic_printf(ic, "%s MCS 40MHz:\n", modestr);
395 ht_rateprint(ic, mode, 2);
397 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) &&
398 (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40)) {
399 ic_printf(ic, "%s MCS 40MHz SGI:\n", modestr);
400 ht_rateprint(ic, mode, 3);
405 ieee80211_ht_announce(struct ieee80211com *ic)
408 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) ||
409 isset(ic->ic_modecaps, IEEE80211_MODE_11NG))
410 ic_printf(ic, "%dT%dR\n", ic->ic_txstream, ic->ic_rxstream);
411 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA))
412 ht_announce(ic, IEEE80211_MODE_11NA);
413 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NG))
414 ht_announce(ic, IEEE80211_MODE_11NG);
417 static struct ieee80211_htrateset htrateset;
419 const struct ieee80211_htrateset *
420 ieee80211_get_suphtrates(struct ieee80211com *ic,
421 const struct ieee80211_channel *c)
423 #define ADDRATE(x) do { \
424 htrateset.rs_rates[htrateset.rs_nrates] = x; \
425 htrateset.rs_nrates++; \
429 memset(&htrateset, 0, sizeof(struct ieee80211_htrateset));
430 for (i = 0; i < ic->ic_txstream * 8; i++)
432 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) &&
433 (ic->ic_htcaps & IEEE80211_HTC_TXMCS32))
435 if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL) {
436 if (ic->ic_txstream >= 2) {
437 for (i = 33; i <= 38; i++)
440 if (ic->ic_txstream >= 3) {
441 for (i = 39; i <= 52; i++)
444 if (ic->ic_txstream == 4) {
445 for (i = 53; i <= 76; i++)
454 * Receive processing.
458 * Decap the encapsulated A-MSDU frames and dispatch all but
459 * the last for delivery. The last frame is returned for
460 * delivery via the normal path.
463 ieee80211_decap_amsdu(struct ieee80211_node *ni, struct mbuf *m)
465 struct ieee80211vap *vap = ni->ni_vap;
469 /* discard 802.3 header inserted by ieee80211_decap */
470 m_adj(m, sizeof(struct ether_header));
472 vap->iv_stats.is_amsdu_decap++;
476 * Decap the first frame, bust it apart from the
477 * remainder and deliver. We leave the last frame
478 * delivery to the caller (for consistency with other
479 * code paths, could also do it here).
481 m = ieee80211_decap1(m, &framelen);
483 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
484 ni->ni_macaddr, "a-msdu", "%s", "decap failed");
485 vap->iv_stats.is_amsdu_tooshort++;
488 if (m->m_pkthdr.len == framelen)
490 n = m_split(m, framelen, M_NOWAIT);
492 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
493 ni->ni_macaddr, "a-msdu",
494 "%s", "unable to split encapsulated frames");
495 vap->iv_stats.is_amsdu_split++;
496 m_freem(m); /* NB: must reclaim */
499 vap->iv_deliver_data(vap, ni, m);
502 * Remove frame contents; each intermediate frame
503 * is required to be aligned to a 4-byte boundary.
506 m_adj(m, roundup2(framelen, 4) - framelen); /* padding */
508 return m; /* last delivered by caller */
512 * Purge all frames in the A-MPDU re-order queue.
515 ampdu_rx_purge(struct ieee80211_rx_ampdu *rap)
520 for (i = 0; i < rap->rxa_wnd; i++) {
523 rap->rxa_m[i] = NULL;
524 rap->rxa_qbytes -= m->m_pkthdr.len;
526 if (--rap->rxa_qframes == 0)
530 KASSERT(rap->rxa_qbytes == 0 && rap->rxa_qframes == 0,
531 ("lost %u data, %u frames on ampdu rx q",
532 rap->rxa_qbytes, rap->rxa_qframes));
536 * Start A-MPDU rx/re-order processing for the specified TID.
539 ampdu_rx_start(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap,
540 int baparamset, int batimeout, int baseqctl)
542 int bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ);
544 if (rap->rxa_flags & IEEE80211_AGGR_RUNNING) {
546 * AMPDU previously setup and not terminated with a DELBA,
547 * flush the reorder q's in case anything remains.
551 memset(rap, 0, sizeof(*rap));
552 rap->rxa_wnd = (bufsiz == 0) ?
553 IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX);
554 rap->rxa_start = MS(baseqctl, IEEE80211_BASEQ_START);
555 rap->rxa_flags |= IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_XCHGPEND;
561 * Stop A-MPDU rx processing for the specified TID.
564 ampdu_rx_stop(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap)
568 rap->rxa_flags &= ~(IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_XCHGPEND);
572 * Dispatch a frame from the A-MPDU reorder queue. The
573 * frame is fed back into ieee80211_input marked with an
574 * M_AMPDU_MPDU flag so it doesn't come back to us (it also
575 * permits ieee80211_input to optimize re-processing).
578 ampdu_dispatch(struct ieee80211_node *ni, struct mbuf *m)
580 m->m_flags |= M_AMPDU_MPDU; /* bypass normal processing */
581 /* NB: rssi and noise are ignored w/ M_AMPDU_MPDU set */
582 (void) ieee80211_input(ni, m, 0, 0);
586 * Dispatch as many frames as possible from the re-order queue.
587 * Frames will always be "at the front"; we process all frames
588 * up to the first empty slot in the window. On completion we
589 * cleanup state if there are still pending frames in the current
590 * BA window. We assume the frame at slot 0 is already handled
591 * by the caller; we always start at slot 1.
594 ampdu_rx_dispatch(struct ieee80211_rx_ampdu *rap, struct ieee80211_node *ni)
596 struct ieee80211vap *vap = ni->ni_vap;
600 /* flush run of frames */
601 for (i = 1; i < rap->rxa_wnd; i++) {
605 rap->rxa_m[i] = NULL;
606 rap->rxa_qbytes -= m->m_pkthdr.len;
609 ampdu_dispatch(ni, m);
612 * If frames remain, copy the mbuf pointers down so
613 * they correspond to the offsets in the new window.
615 if (rap->rxa_qframes != 0) {
616 int n = rap->rxa_qframes, j;
617 for (j = i+1; j < rap->rxa_wnd; j++) {
618 if (rap->rxa_m[j] != NULL) {
619 rap->rxa_m[j-i] = rap->rxa_m[j];
620 rap->rxa_m[j] = NULL;
625 KASSERT(n == 0, ("lost %d frames", n));
626 vap->iv_stats.is_ampdu_rx_copy += rap->rxa_qframes;
629 * Adjust the start of the BA window to
630 * reflect the frames just dispatched.
632 rap->rxa_start = IEEE80211_SEQ_ADD(rap->rxa_start, i);
633 vap->iv_stats.is_ampdu_rx_oor += i;
636 #ifdef IEEE80211_AMPDU_AGE
638 * Dispatch all frames in the A-MPDU re-order queue.
641 ampdu_rx_flush(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap)
643 struct ieee80211vap *vap = ni->ni_vap;
647 for (i = 0; i < rap->rxa_wnd; i++) {
651 rap->rxa_m[i] = NULL;
652 rap->rxa_qbytes -= m->m_pkthdr.len;
654 vap->iv_stats.is_ampdu_rx_oor++;
656 ampdu_dispatch(ni, m);
657 if (rap->rxa_qframes == 0)
661 #endif /* IEEE80211_AMPDU_AGE */
664 * Dispatch all frames in the A-MPDU re-order queue
665 * preceding the specified sequence number. This logic
666 * handles window moves due to a received MSDU or BAR.
669 ampdu_rx_flush_upto(struct ieee80211_node *ni,
670 struct ieee80211_rx_ampdu *rap, ieee80211_seq winstart)
672 struct ieee80211vap *vap = ni->ni_vap;
678 * Flush any complete MSDU's with a sequence number lower
679 * than winstart. Gaps may exist. Note that we may actually
680 * dispatch frames past winstart if a run continues; this is
681 * an optimization that avoids having to do a separate pass
682 * to dispatch frames after moving the BA window start.
684 seqno = rap->rxa_start;
685 for (i = 0; i < rap->rxa_wnd; i++) {
688 rap->rxa_m[i] = NULL;
689 rap->rxa_qbytes -= m->m_pkthdr.len;
691 vap->iv_stats.is_ampdu_rx_oor++;
693 ampdu_dispatch(ni, m);
695 if (!IEEE80211_SEQ_BA_BEFORE(seqno, winstart))
698 seqno = IEEE80211_SEQ_INC(seqno);
701 * If frames remain, copy the mbuf pointers down so
702 * they correspond to the offsets in the new window.
704 if (rap->rxa_qframes != 0) {
705 int n = rap->rxa_qframes, j;
707 /* NB: this loop assumes i > 0 and/or rxa_m[0] is NULL */
708 KASSERT(rap->rxa_m[0] == NULL,
709 ("%s: BA window slot 0 occupied", __func__));
710 for (j = i+1; j < rap->rxa_wnd; j++) {
711 if (rap->rxa_m[j] != NULL) {
712 rap->rxa_m[j-i] = rap->rxa_m[j];
713 rap->rxa_m[j] = NULL;
718 KASSERT(n == 0, ("%s: lost %d frames, qframes %d off %d "
719 "BA win <%d:%d> winstart %d",
720 __func__, n, rap->rxa_qframes, i, rap->rxa_start,
721 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
723 vap->iv_stats.is_ampdu_rx_copy += rap->rxa_qframes;
726 * Move the start of the BA window; we use the
727 * sequence number of the last MSDU that was
728 * passed up the stack+1 or winstart if stopped on
729 * a gap in the reorder buffer.
731 rap->rxa_start = seqno;
735 * Process a received QoS data frame for an HT station. Handle
736 * A-MPDU reordering: if this frame is received out of order
737 * and falls within the BA window hold onto it. Otherwise if
738 * this frame completes a run, flush any pending frames. We
739 * return 1 if the frame is consumed. A 0 is returned if
740 * the frame should be processed normally by the caller.
743 ieee80211_ampdu_reorder(struct ieee80211_node *ni, struct mbuf *m)
745 #define IEEE80211_FC0_QOSDATA \
746 (IEEE80211_FC0_TYPE_DATA|IEEE80211_FC0_SUBTYPE_QOS|IEEE80211_FC0_VERSION_0)
747 #define PROCESS 0 /* caller should process frame */
748 #define CONSUMED 1 /* frame consumed, caller does nothing */
749 struct ieee80211vap *vap = ni->ni_vap;
750 struct ieee80211_qosframe *wh;
751 struct ieee80211_rx_ampdu *rap;
756 KASSERT((m->m_flags & (M_AMPDU | M_AMPDU_MPDU)) == M_AMPDU,
757 ("!a-mpdu or already re-ordered, flags 0x%x", m->m_flags));
758 KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT sta"));
760 /* NB: m_len known to be sufficient */
761 wh = mtod(m, struct ieee80211_qosframe *);
762 if (wh->i_fc[0] != IEEE80211_FC0_QOSDATA) {
764 * Not QoS data, shouldn't get here but just
765 * return it to the caller for processing.
769 if (IEEE80211_IS_DSTODS(wh))
770 tid = ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0];
773 tid &= IEEE80211_QOS_TID;
774 rap = &ni->ni_rx_ampdu[tid];
775 if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) {
777 * No ADDBA request yet, don't touch.
781 rxseq = le16toh(*(uint16_t *)wh->i_seq);
782 if ((rxseq & IEEE80211_SEQ_FRAG_MASK) != 0) {
784 * Fragments are not allowed; toss.
786 IEEE80211_DISCARD_MAC(vap,
787 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr,
788 "A-MPDU", "fragment, rxseq 0x%x tid %u%s", rxseq, tid,
789 wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : "");
790 vap->iv_stats.is_ampdu_rx_drop++;
791 IEEE80211_NODE_STAT(ni, rx_drop);
795 rxseq >>= IEEE80211_SEQ_SEQ_SHIFT;
798 if (rxseq == rap->rxa_start) {
800 * First frame in window.
802 if (rap->rxa_qframes != 0) {
804 * Dispatch as many packets as we can.
806 KASSERT(rap->rxa_m[0] == NULL, ("unexpected dup"));
807 ampdu_dispatch(ni, m);
808 ampdu_rx_dispatch(rap, ni);
812 * In order; advance window and notify
813 * caller to dispatch directly.
815 rap->rxa_start = IEEE80211_SEQ_INC(rxseq);
820 * Frame is out of order; store if in the BA window.
822 /* calculate offset in BA window */
823 off = IEEE80211_SEQ_SUB(rxseq, rap->rxa_start);
824 if (off < rap->rxa_wnd) {
826 * Common case (hopefully): in the BA window.
827 * Sec 9.10.7.6.2 a) (p.137)
829 #ifdef IEEE80211_AMPDU_AGE
831 * Check for frames sitting too long in the reorder queue.
832 * This should only ever happen if frames are not delivered
833 * without the sender otherwise notifying us (e.g. with a
834 * BAR to move the window). Typically this happens because
835 * of vendor bugs that cause the sequence number to jump.
836 * When this happens we get a gap in the reorder queue that
837 * leaves frame sitting on the queue until they get pushed
838 * out due to window moves. When the vendor does not send
839 * BAR this move only happens due to explicit packet sends
841 * NB: we only track the time of the oldest frame in the
842 * reorder q; this means that if we flush we might push
843 * frames that still "new"; if this happens then subsequent
844 * frames will result in BA window moves which cost something
845 * but is still better than a big throughput dip.
847 if (rap->rxa_qframes != 0) {
848 /* XXX honor batimeout? */
849 if (ticks - rap->rxa_age > ieee80211_ampdu_age) {
851 * Too long since we received the first
852 * frame; flush the reorder buffer.
854 if (rap->rxa_qframes != 0) {
855 vap->iv_stats.is_ampdu_rx_age +=
857 ampdu_rx_flush(ni, rap);
859 rap->rxa_start = IEEE80211_SEQ_INC(rxseq);
864 * First frame, start aging timer.
866 rap->rxa_age = ticks;
868 #endif /* IEEE80211_AMPDU_AGE */
870 if (rap->rxa_m[off] == NULL) {
873 rap->rxa_qbytes += m->m_pkthdr.len;
874 vap->iv_stats.is_ampdu_rx_reorder++;
876 IEEE80211_DISCARD_MAC(vap,
877 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N,
878 ni->ni_macaddr, "a-mpdu duplicate",
879 "seqno %u tid %u BA win <%u:%u>",
880 rxseq, tid, rap->rxa_start,
881 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1));
882 vap->iv_stats.is_rx_dup++;
883 IEEE80211_NODE_STAT(ni, rx_dup);
888 if (off < IEEE80211_SEQ_BA_RANGE) {
890 * Outside the BA window, but within range;
891 * flush the reorder q and move the window.
892 * Sec 9.10.7.6.2 b) (p.138)
894 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni,
895 "move BA win <%u:%u> (%u frames) rxseq %u tid %u",
897 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
898 rap->rxa_qframes, rxseq, tid);
899 vap->iv_stats.is_ampdu_rx_move++;
902 * The spec says to flush frames up to but not including:
903 * WinStart_B = rxseq - rap->rxa_wnd + 1
904 * Then insert the frame or notify the caller to process
905 * it immediately. We can safely do this by just starting
906 * over again because we know the frame will now be within
909 /* NB: rxa_wnd known to be >0 */
910 ampdu_rx_flush_upto(ni, rap,
911 IEEE80211_SEQ_SUB(rxseq, rap->rxa_wnd-1));
915 * Outside the BA window and out of range; toss.
916 * Sec 9.10.7.6.2 c) (p.138)
918 IEEE80211_DISCARD_MAC(vap,
919 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr,
920 "MPDU", "BA win <%u:%u> (%u frames) rxseq %u tid %u%s",
922 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
923 rap->rxa_qframes, rxseq, tid,
924 wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : "");
925 vap->iv_stats.is_ampdu_rx_drop++;
926 IEEE80211_NODE_STAT(ni, rx_drop);
932 #undef IEEE80211_FC0_QOSDATA
936 * Process a BAR ctl frame. Dispatch all frames up to
937 * the sequence number of the frame. If this frame is
938 * out of range it's discarded.
941 ieee80211_recv_bar(struct ieee80211_node *ni, struct mbuf *m0)
943 struct ieee80211vap *vap = ni->ni_vap;
944 struct ieee80211_frame_bar *wh;
945 struct ieee80211_rx_ampdu *rap;
949 if (!ieee80211_recv_bar_ena) {
951 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_11N,
952 ni->ni_macaddr, "BAR", "%s", "processing disabled");
954 vap->iv_stats.is_ampdu_bar_bad++;
957 wh = mtod(m0, struct ieee80211_frame_bar *);
958 /* XXX check basic BAR */
959 tid = MS(le16toh(wh->i_ctl), IEEE80211_BAR_TID);
960 rap = &ni->ni_rx_ampdu[tid];
961 if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) {
963 * No ADDBA request yet, don't touch.
965 IEEE80211_DISCARD_MAC(vap,
966 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N,
967 ni->ni_macaddr, "BAR", "no BA stream, tid %u", tid);
968 vap->iv_stats.is_ampdu_bar_bad++;
971 vap->iv_stats.is_ampdu_bar_rx++;
972 rxseq = le16toh(wh->i_seq) >> IEEE80211_SEQ_SEQ_SHIFT;
973 if (rxseq == rap->rxa_start)
975 /* calculate offset in BA window */
976 off = IEEE80211_SEQ_SUB(rxseq, rap->rxa_start);
977 if (off < IEEE80211_SEQ_BA_RANGE) {
979 * Flush the reorder q up to rxseq and move the window.
980 * Sec 9.10.7.6.3 a) (p.138)
982 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni,
983 "BAR moves BA win <%u:%u> (%u frames) rxseq %u tid %u",
985 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
986 rap->rxa_qframes, rxseq, tid);
987 vap->iv_stats.is_ampdu_bar_move++;
989 ampdu_rx_flush_upto(ni, rap, rxseq);
990 if (off >= rap->rxa_wnd) {
992 * BAR specifies a window start to the right of BA
993 * window; we must move it explicitly since
994 * ampdu_rx_flush_upto will not.
996 rap->rxa_start = rxseq;
1000 * Out of range; toss.
1001 * Sec 9.10.7.6.3 b) (p.138)
1003 IEEE80211_DISCARD_MAC(vap,
1004 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr,
1005 "BAR", "BA win <%u:%u> (%u frames) rxseq %u tid %u%s",
1007 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
1008 rap->rxa_qframes, rxseq, tid,
1009 wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : "");
1010 vap->iv_stats.is_ampdu_bar_oow++;
1011 IEEE80211_NODE_STAT(ni, rx_drop);
1016 * Setup HT-specific state in a node. Called only
1017 * when HT use is negotiated so we don't do extra
1018 * work for temporary and/or legacy sta's.
1021 ieee80211_ht_node_init(struct ieee80211_node *ni)
1023 struct ieee80211_tx_ampdu *tap;
1026 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
1031 if (ni->ni_flags & IEEE80211_NODE_HT) {
1033 * Clean AMPDU state on re-associate. This handles the case
1034 * where a station leaves w/o notifying us and then returns
1035 * before node is reaped for inactivity.
1037 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
1039 "%s: calling cleanup",
1041 ieee80211_ht_node_cleanup(ni);
1043 for (tid = 0; tid < WME_NUM_TID; tid++) {
1044 tap = &ni->ni_tx_ampdu[tid];
1047 tap->txa_lastsample = ticks;
1048 /* NB: further initialization deferred */
1050 ni->ni_flags |= IEEE80211_NODE_HT | IEEE80211_NODE_AMPDU;
1054 * Cleanup HT-specific state in a node. Called only
1055 * when HT use has been marked.
1058 ieee80211_ht_node_cleanup(struct ieee80211_node *ni)
1060 struct ieee80211com *ic = ni->ni_ic;
1063 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
1068 KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT node"));
1070 /* XXX optimize this */
1071 for (i = 0; i < WME_NUM_TID; i++) {
1072 struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[i];
1073 if (tap->txa_flags & IEEE80211_AGGR_SETUP)
1076 for (i = 0; i < WME_NUM_TID; i++)
1077 ic->ic_ampdu_rx_stop(ni, &ni->ni_rx_ampdu[i]);
1080 ni->ni_flags &= ~IEEE80211_NODE_HT_ALL;
1084 * Age out HT resources for a station.
1087 ieee80211_ht_node_age(struct ieee80211_node *ni)
1089 #ifdef IEEE80211_AMPDU_AGE
1090 struct ieee80211vap *vap = ni->ni_vap;
1094 KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT sta"));
1096 #ifdef IEEE80211_AMPDU_AGE
1097 for (tid = 0; tid < WME_NUM_TID; tid++) {
1098 struct ieee80211_rx_ampdu *rap;
1100 rap = &ni->ni_rx_ampdu[tid];
1101 if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0)
1103 if (rap->rxa_qframes == 0)
1106 * Check for frames sitting too long in the reorder queue.
1107 * See above for more details on what's happening here.
1109 /* XXX honor batimeout? */
1110 if (ticks - rap->rxa_age > ieee80211_ampdu_age) {
1112 * Too long since we received the first
1113 * frame; flush the reorder buffer.
1115 vap->iv_stats.is_ampdu_rx_age += rap->rxa_qframes;
1116 ampdu_rx_flush(ni, rap);
1119 #endif /* IEEE80211_AMPDU_AGE */
1122 static struct ieee80211_channel *
1123 findhtchan(struct ieee80211com *ic, struct ieee80211_channel *c, int htflags)
1125 return ieee80211_find_channel(ic, c->ic_freq,
1126 (c->ic_flags &~ IEEE80211_CHAN_HT) | htflags);
1130 * Adjust a channel to be HT/non-HT according to the vap's configuration.
1132 struct ieee80211_channel *
1133 ieee80211_ht_adjust_channel(struct ieee80211com *ic,
1134 struct ieee80211_channel *chan, int flags)
1136 struct ieee80211_channel *c;
1138 if (flags & IEEE80211_FHT_HT) {
1139 /* promote to HT if possible */
1140 if (flags & IEEE80211_FHT_USEHT40) {
1141 if (!IEEE80211_IS_CHAN_HT40(chan)) {
1142 /* NB: arbitrarily pick ht40+ over ht40- */
1143 c = findhtchan(ic, chan, IEEE80211_CHAN_HT40U);
1145 c = findhtchan(ic, chan,
1146 IEEE80211_CHAN_HT40D);
1148 c = findhtchan(ic, chan,
1149 IEEE80211_CHAN_HT20);
1153 } else if (!IEEE80211_IS_CHAN_HT20(chan)) {
1154 c = findhtchan(ic, chan, IEEE80211_CHAN_HT20);
1158 } else if (IEEE80211_IS_CHAN_HT(chan)) {
1159 /* demote to legacy, HT use is disabled */
1160 c = ieee80211_find_channel(ic, chan->ic_freq,
1161 chan->ic_flags &~ IEEE80211_CHAN_HT);
1169 * Setup HT-specific state for a legacy WDS peer.
1172 ieee80211_ht_wds_init(struct ieee80211_node *ni)
1174 struct ieee80211vap *vap = ni->ni_vap;
1175 struct ieee80211_tx_ampdu *tap;
1178 KASSERT(vap->iv_flags_ht & IEEE80211_FHT_HT, ("no HT requested"));
1180 /* XXX check scan cache in case peer has an ap and we have info */
1182 * If setup with a legacy channel; locate an HT channel.
1183 * Otherwise if the inherited channel (from a companion
1184 * AP) is suitable use it so we use the same location
1185 * for the extension channel).
1187 ni->ni_chan = ieee80211_ht_adjust_channel(ni->ni_ic,
1188 ni->ni_chan, ieee80211_htchanflags(ni->ni_chan));
1191 if (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20)
1192 ni->ni_htcap |= IEEE80211_HTCAP_SHORTGI20;
1193 if (IEEE80211_IS_CHAN_HT40(ni->ni_chan)) {
1194 ni->ni_htcap |= IEEE80211_HTCAP_CHWIDTH40;
1196 if (IEEE80211_IS_CHAN_HT40U(ni->ni_chan))
1197 ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_ABOVE;
1198 else if (IEEE80211_IS_CHAN_HT40D(ni->ni_chan))
1199 ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_BELOW;
1200 if (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40)
1201 ni->ni_htcap |= IEEE80211_HTCAP_SHORTGI40;
1204 ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_NONE;
1206 ni->ni_htctlchan = ni->ni_chan->ic_ieee;
1207 if (vap->iv_flags_ht & IEEE80211_FHT_RIFS)
1208 ni->ni_flags |= IEEE80211_NODE_RIFS;
1209 /* XXX does it make sense to enable SMPS? */
1211 ni->ni_htopmode = 0; /* XXX need protection state */
1212 ni->ni_htstbc = 0; /* XXX need info */
1214 for (tid = 0; tid < WME_NUM_TID; tid++) {
1215 tap = &ni->ni_tx_ampdu[tid];
1217 tap->txa_lastsample = ticks;
1219 /* NB: AMPDU tx/rx governed by IEEE80211_FHT_AMPDU_{TX,RX} */
1220 ni->ni_flags |= IEEE80211_NODE_HT | IEEE80211_NODE_AMPDU;
1224 * Notify hostap vaps of a change in the HTINFO ie.
1227 htinfo_notify(struct ieee80211com *ic)
1229 struct ieee80211vap *vap;
1232 IEEE80211_LOCK_ASSERT(ic);
1234 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1235 if (vap->iv_opmode != IEEE80211_M_HOSTAP)
1237 if (vap->iv_state != IEEE80211_S_RUN ||
1238 !IEEE80211_IS_CHAN_HT(vap->iv_bss->ni_chan))
1242 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N,
1244 "HT bss occupancy change: %d sta, %d ht, "
1245 "%d ht40%s, HT protmode now 0x%x"
1247 , ic->ic_ht_sta_assoc
1248 , ic->ic_ht40_sta_assoc
1249 , (ic->ic_flags_ht & IEEE80211_FHT_NONHT_PR) ?
1250 ", non-HT sta present" : ""
1251 , ic->ic_curhtprotmode);
1254 ieee80211_beacon_notify(vap, IEEE80211_BEACON_HTINFO);
1259 * Calculate HT protection mode from current
1260 * state and handle updates.
1263 htinfo_update(struct ieee80211com *ic)
1267 if (ic->ic_sta_assoc != ic->ic_ht_sta_assoc) {
1268 protmode = IEEE80211_HTINFO_OPMODE_MIXED
1269 | IEEE80211_HTINFO_NONHT_PRESENT;
1270 } else if (ic->ic_flags_ht & IEEE80211_FHT_NONHT_PR) {
1271 protmode = IEEE80211_HTINFO_OPMODE_PROTOPT
1272 | IEEE80211_HTINFO_NONHT_PRESENT;
1273 } else if (ic->ic_bsschan != IEEE80211_CHAN_ANYC &&
1274 IEEE80211_IS_CHAN_HT40(ic->ic_bsschan) &&
1275 ic->ic_sta_assoc != ic->ic_ht40_sta_assoc) {
1276 protmode = IEEE80211_HTINFO_OPMODE_HT20PR;
1278 protmode = IEEE80211_HTINFO_OPMODE_PURE;
1280 if (protmode != ic->ic_curhtprotmode) {
1281 ic->ic_curhtprotmode = protmode;
1287 * Handle an HT station joining a BSS.
1290 ieee80211_ht_node_join(struct ieee80211_node *ni)
1292 struct ieee80211com *ic = ni->ni_ic;
1294 IEEE80211_LOCK_ASSERT(ic);
1296 if (ni->ni_flags & IEEE80211_NODE_HT) {
1297 ic->ic_ht_sta_assoc++;
1298 if (ni->ni_chw == 40)
1299 ic->ic_ht40_sta_assoc++;
1305 * Handle an HT station leaving a BSS.
1308 ieee80211_ht_node_leave(struct ieee80211_node *ni)
1310 struct ieee80211com *ic = ni->ni_ic;
1312 IEEE80211_LOCK_ASSERT(ic);
1314 if (ni->ni_flags & IEEE80211_NODE_HT) {
1315 ic->ic_ht_sta_assoc--;
1316 if (ni->ni_chw == 40)
1317 ic->ic_ht40_sta_assoc--;
1323 * Public version of htinfo_update; used for processing
1324 * beacon frames from overlapping bss.
1326 * Caller can specify either IEEE80211_HTINFO_OPMODE_MIXED
1327 * (on receipt of a beacon that advertises MIXED) or
1328 * IEEE80211_HTINFO_OPMODE_PROTOPT (on receipt of a beacon
1329 * from an overlapping legacy bss). We treat MIXED with
1330 * a higher precedence than PROTOPT (i.e. we will not change
1331 * change PROTOPT -> MIXED; only MIXED -> PROTOPT). This
1332 * corresponds to how we handle things in htinfo_update.
1335 ieee80211_htprot_update(struct ieee80211com *ic, int protmode)
1337 #define OPMODE(x) SM(x, IEEE80211_HTINFO_OPMODE)
1340 /* track non-HT station presence */
1341 KASSERT(protmode & IEEE80211_HTINFO_NONHT_PRESENT,
1342 ("protmode 0x%x", protmode));
1343 ic->ic_flags_ht |= IEEE80211_FHT_NONHT_PR;
1344 ic->ic_lastnonht = ticks;
1346 if (protmode != ic->ic_curhtprotmode &&
1347 (OPMODE(ic->ic_curhtprotmode) != IEEE80211_HTINFO_OPMODE_MIXED ||
1348 OPMODE(protmode) == IEEE80211_HTINFO_OPMODE_PROTOPT)) {
1349 /* push beacon update */
1350 ic->ic_curhtprotmode = protmode;
1353 IEEE80211_UNLOCK(ic);
1358 * Time out presence of an overlapping bss with non-HT
1359 * stations. When operating in hostap mode we listen for
1360 * beacons from other stations and if we identify a non-HT
1361 * station is present we update the opmode field of the
1362 * HTINFO ie. To identify when all non-HT stations are
1363 * gone we time out this condition.
1366 ieee80211_ht_timeout(struct ieee80211com *ic)
1368 IEEE80211_LOCK_ASSERT(ic);
1370 if ((ic->ic_flags_ht & IEEE80211_FHT_NONHT_PR) &&
1371 time_after(ticks, ic->ic_lastnonht + IEEE80211_NONHT_PRESENT_AGE)) {
1373 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni,
1374 "%s", "time out non-HT STA present on channel");
1376 ic->ic_flags_ht &= ~IEEE80211_FHT_NONHT_PR;
1381 /* unalligned little endian access */
1382 #define LE_READ_2(p) \
1384 ((((const uint8_t *)(p))[0] ) | \
1385 (((const uint8_t *)(p))[1] << 8)))
1388 * Process an 802.11n HT capabilities ie.
1391 ieee80211_parse_htcap(struct ieee80211_node *ni, const uint8_t *ie)
1393 if (ie[0] == IEEE80211_ELEMID_VENDOR) {
1395 * Station used Vendor OUI ie to associate;
1396 * mark the node so when we respond we'll use
1397 * the Vendor OUI's and not the standard ie's.
1399 ni->ni_flags |= IEEE80211_NODE_HTCOMPAT;
1402 ni->ni_flags &= ~IEEE80211_NODE_HTCOMPAT;
1404 ni->ni_htcap = LE_READ_2(ie +
1405 __offsetof(struct ieee80211_ie_htcap, hc_cap));
1406 ni->ni_htparam = ie[__offsetof(struct ieee80211_ie_htcap, hc_param)];
1410 htinfo_parse(struct ieee80211_node *ni,
1411 const struct ieee80211_ie_htinfo *htinfo)
1415 ni->ni_htctlchan = htinfo->hi_ctrlchannel;
1416 ni->ni_ht2ndchan = SM(htinfo->hi_byte1, IEEE80211_HTINFO_2NDCHAN);
1417 w = LE_READ_2(&htinfo->hi_byte2);
1418 ni->ni_htopmode = SM(w, IEEE80211_HTINFO_OPMODE);
1419 w = LE_READ_2(&htinfo->hi_byte45);
1420 ni->ni_htstbc = SM(w, IEEE80211_HTINFO_BASIC_STBCMCS);
1424 * Parse an 802.11n HT info ie and save useful information
1425 * to the node state. Note this does not effect any state
1426 * changes such as for channel width change.
1429 ieee80211_parse_htinfo(struct ieee80211_node *ni, const uint8_t *ie)
1431 if (ie[0] == IEEE80211_ELEMID_VENDOR)
1433 htinfo_parse(ni, (const struct ieee80211_ie_htinfo *) ie);
1437 * Handle 11n channel switch. Use the received HT ie's to
1438 * identify the right channel to use. If we cannot locate it
1439 * in the channel table then fallback to legacy operation.
1440 * Note that we use this information to identify the node's
1441 * channel only; the caller is responsible for insuring any
1442 * required channel change is done (e.g. in sta mode when
1443 * parsing the contents of a beacon frame).
1446 htinfo_update_chw(struct ieee80211_node *ni, int htflags)
1448 struct ieee80211com *ic = ni->ni_ic;
1449 struct ieee80211_channel *c;
1453 chanflags = (ni->ni_chan->ic_flags &~ IEEE80211_CHAN_HT) | htflags;
1454 if (chanflags != ni->ni_chan->ic_flags) {
1455 /* XXX not right for ht40- */
1456 c = ieee80211_find_channel(ic, ni->ni_chan->ic_freq, chanflags);
1457 if (c == NULL && (htflags & IEEE80211_CHAN_HT40)) {
1459 * No HT40 channel entry in our table; fall back
1460 * to HT20 operation. This should not happen.
1462 c = findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT20);
1464 IEEE80211_NOTE(ni->ni_vap,
1465 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni,
1466 "no HT40 channel (freq %u), falling back to HT20",
1467 ni->ni_chan->ic_freq);
1471 if (c != NULL && c != ni->ni_chan) {
1472 IEEE80211_NOTE(ni->ni_vap,
1473 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni,
1474 "switch station to HT%d channel %u/0x%x",
1475 IEEE80211_IS_CHAN_HT40(c) ? 40 : 20,
1476 c->ic_freq, c->ic_flags);
1480 /* NB: caller responsible for forcing any channel change */
1482 /* update node's tx channel width */
1483 ni->ni_chw = IEEE80211_IS_CHAN_HT40(ni->ni_chan)? 40 : 20;
1488 * Update 11n MIMO PS state according to received htcap.
1491 htcap_update_mimo_ps(struct ieee80211_node *ni)
1493 uint16_t oflags = ni->ni_flags;
1495 switch (ni->ni_htcap & IEEE80211_HTCAP_SMPS) {
1496 case IEEE80211_HTCAP_SMPS_DYNAMIC:
1497 ni->ni_flags |= IEEE80211_NODE_MIMO_PS;
1498 ni->ni_flags |= IEEE80211_NODE_MIMO_RTS;
1500 case IEEE80211_HTCAP_SMPS_ENA:
1501 ni->ni_flags |= IEEE80211_NODE_MIMO_PS;
1502 ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS;
1504 case IEEE80211_HTCAP_SMPS_OFF:
1505 default: /* disable on rx of reserved value */
1506 ni->ni_flags &= ~IEEE80211_NODE_MIMO_PS;
1507 ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS;
1510 return (oflags ^ ni->ni_flags);
1514 * Update short GI state according to received htcap
1515 * and local settings.
1517 static __inline void
1518 htcap_update_shortgi(struct ieee80211_node *ni)
1520 struct ieee80211vap *vap = ni->ni_vap;
1522 ni->ni_flags &= ~(IEEE80211_NODE_SGI20|IEEE80211_NODE_SGI40);
1523 if ((ni->ni_htcap & IEEE80211_HTCAP_SHORTGI20) &&
1524 (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20))
1525 ni->ni_flags |= IEEE80211_NODE_SGI20;
1526 if ((ni->ni_htcap & IEEE80211_HTCAP_SHORTGI40) &&
1527 (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40))
1528 ni->ni_flags |= IEEE80211_NODE_SGI40;
1532 * Parse and update HT-related state extracted from
1533 * the HT cap and info ie's.
1536 ieee80211_ht_updateparams(struct ieee80211_node *ni,
1537 const uint8_t *htcapie, const uint8_t *htinfoie)
1539 struct ieee80211vap *vap = ni->ni_vap;
1540 const struct ieee80211_ie_htinfo *htinfo;
1544 ieee80211_parse_htcap(ni, htcapie);
1545 if (vap->iv_htcaps & IEEE80211_HTCAP_SMPS)
1546 htcap_update_mimo_ps(ni);
1547 htcap_update_shortgi(ni);
1549 if (htinfoie[0] == IEEE80211_ELEMID_VENDOR)
1551 htinfo = (const struct ieee80211_ie_htinfo *) htinfoie;
1552 htinfo_parse(ni, htinfo);
1554 htflags = (vap->iv_flags_ht & IEEE80211_FHT_HT) ?
1555 IEEE80211_CHAN_HT20 : 0;
1556 /* NB: honor operating mode constraint */
1557 if ((htinfo->hi_byte1 & IEEE80211_HTINFO_TXWIDTH_2040) &&
1558 (vap->iv_flags_ht & IEEE80211_FHT_USEHT40)) {
1559 if (ni->ni_ht2ndchan == IEEE80211_HTINFO_2NDCHAN_ABOVE)
1560 htflags = IEEE80211_CHAN_HT40U;
1561 else if (ni->ni_ht2ndchan == IEEE80211_HTINFO_2NDCHAN_BELOW)
1562 htflags = IEEE80211_CHAN_HT40D;
1564 if (htinfo_update_chw(ni, htflags))
1567 if ((htinfo->hi_byte1 & IEEE80211_HTINFO_RIFSMODE_PERM) &&
1568 (vap->iv_flags_ht & IEEE80211_FHT_RIFS))
1569 ni->ni_flags |= IEEE80211_NODE_RIFS;
1571 ni->ni_flags &= ~IEEE80211_NODE_RIFS;
1577 * Parse and update HT-related state extracted from the HT cap ie
1578 * for a station joining an HT BSS.
1581 ieee80211_ht_updatehtcap(struct ieee80211_node *ni, const uint8_t *htcapie)
1583 struct ieee80211vap *vap = ni->ni_vap;
1586 ieee80211_parse_htcap(ni, htcapie);
1587 if (vap->iv_htcaps & IEEE80211_HTCAP_SMPS)
1588 htcap_update_mimo_ps(ni);
1589 htcap_update_shortgi(ni);
1591 /* NB: honor operating mode constraint */
1592 /* XXX 40 MHz intolerant */
1593 htflags = (vap->iv_flags_ht & IEEE80211_FHT_HT) ?
1594 IEEE80211_CHAN_HT20 : 0;
1595 if ((ni->ni_htcap & IEEE80211_HTCAP_CHWIDTH40) &&
1596 (vap->iv_flags_ht & IEEE80211_FHT_USEHT40)) {
1597 if (IEEE80211_IS_CHAN_HT40U(vap->iv_bss->ni_chan))
1598 htflags = IEEE80211_CHAN_HT40U;
1599 else if (IEEE80211_IS_CHAN_HT40D(vap->iv_bss->ni_chan))
1600 htflags = IEEE80211_CHAN_HT40D;
1602 (void) htinfo_update_chw(ni, htflags);
1606 * Install received HT rate set by parsing the HT cap ie.
1609 ieee80211_setup_htrates(struct ieee80211_node *ni, const uint8_t *ie, int flags)
1611 struct ieee80211com *ic = ni->ni_ic;
1612 struct ieee80211vap *vap = ni->ni_vap;
1613 const struct ieee80211_ie_htcap *htcap;
1614 struct ieee80211_htrateset *rs;
1615 int i, maxequalmcs, maxunequalmcs;
1617 maxequalmcs = ic->ic_txstream * 8 - 1;
1618 if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL) {
1619 if (ic->ic_txstream >= 2)
1621 if (ic->ic_txstream >= 3)
1623 if (ic->ic_txstream >= 4)
1628 rs = &ni->ni_htrates;
1629 memset(rs, 0, sizeof(*rs));
1631 if (ie[0] == IEEE80211_ELEMID_VENDOR)
1633 htcap = (const struct ieee80211_ie_htcap *) ie;
1634 for (i = 0; i < IEEE80211_HTRATE_MAXSIZE; i++) {
1635 if (isclr(htcap->hc_mcsset, i))
1637 if (rs->rs_nrates == IEEE80211_HTRATE_MAXSIZE) {
1639 IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni,
1640 "WARNING, HT rate set too large; only "
1641 "using %u rates", IEEE80211_HTRATE_MAXSIZE);
1642 vap->iv_stats.is_rx_rstoobig++;
1645 if (i <= 31 && i > maxequalmcs)
1648 (ic->ic_htcaps & IEEE80211_HTC_TXMCS32) == 0)
1650 if (i > 32 && i > maxunequalmcs)
1652 rs->rs_rates[rs->rs_nrates++] = i;
1655 return ieee80211_fix_rate(ni, (struct ieee80211_rateset *) rs, flags);
1659 * Mark rates in a node's HT rate set as basic according
1660 * to the information in the supplied HT info ie.
1663 ieee80211_setup_basic_htrates(struct ieee80211_node *ni, const uint8_t *ie)
1665 const struct ieee80211_ie_htinfo *htinfo;
1666 struct ieee80211_htrateset *rs;
1669 if (ie[0] == IEEE80211_ELEMID_VENDOR)
1671 htinfo = (const struct ieee80211_ie_htinfo *) ie;
1672 rs = &ni->ni_htrates;
1673 if (rs->rs_nrates == 0) {
1674 IEEE80211_NOTE(ni->ni_vap,
1675 IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni,
1676 "%s", "WARNING, empty HT rate set");
1679 for (i = 0; i < IEEE80211_HTRATE_MAXSIZE; i++) {
1680 if (isclr(htinfo->hi_basicmcsset, i))
1682 for (j = 0; j < rs->rs_nrates; j++)
1683 if ((rs->rs_rates[j] & IEEE80211_RATE_VAL) == i)
1684 rs->rs_rates[j] |= IEEE80211_RATE_BASIC;
1689 ampdu_tx_setup(struct ieee80211_tx_ampdu *tap)
1691 callout_init(&tap->txa_timer, 1);
1692 tap->txa_flags |= IEEE80211_AGGR_SETUP;
1693 tap->txa_lastsample = ticks;
1697 ampdu_tx_stop(struct ieee80211_tx_ampdu *tap)
1699 struct ieee80211_node *ni = tap->txa_ni;
1700 struct ieee80211com *ic = ni->ni_ic;
1702 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N,
1707 KASSERT(tap->txa_flags & IEEE80211_AGGR_SETUP,
1708 ("txa_flags 0x%x tid %d ac %d", tap->txa_flags, tap->txa_tid,
1709 TID_TO_WME_AC(tap->txa_tid)));
1712 * Stop BA stream if setup so driver has a chance
1713 * to reclaim any resources it might have allocated.
1715 ic->ic_addba_stop(ni, tap);
1717 * Stop any pending BAR transmit.
1719 bar_stop_timer(tap);
1722 * Reset packet estimate.
1724 tap->txa_lastsample = ticks;
1725 tap->txa_avgpps = 0;
1727 /* NB: clearing NAK means we may re-send ADDBA */
1728 tap->txa_flags &= ~(IEEE80211_AGGR_SETUP | IEEE80211_AGGR_NAK);
1732 * ADDBA response timeout.
1734 * If software aggregation and per-TID queue management was done here,
1735 * that queue would be unpaused after the ADDBA timeout occurs.
1738 addba_timeout(void *arg)
1740 struct ieee80211_tx_ampdu *tap = arg;
1741 struct ieee80211_node *ni = tap->txa_ni;
1742 struct ieee80211com *ic = ni->ni_ic;
1745 tap->txa_flags &= ~IEEE80211_AGGR_XCHGPEND;
1746 tap->txa_attempts++;
1747 ic->ic_addba_response_timeout(ni, tap);
1751 addba_start_timeout(struct ieee80211_tx_ampdu *tap)
1753 /* XXX use CALLOUT_PENDING instead? */
1754 callout_reset(&tap->txa_timer, ieee80211_addba_timeout,
1755 addba_timeout, tap);
1756 tap->txa_flags |= IEEE80211_AGGR_XCHGPEND;
1757 tap->txa_nextrequest = ticks + ieee80211_addba_timeout;
1761 addba_stop_timeout(struct ieee80211_tx_ampdu *tap)
1763 /* XXX use CALLOUT_PENDING instead? */
1764 if (tap->txa_flags & IEEE80211_AGGR_XCHGPEND) {
1765 callout_stop(&tap->txa_timer);
1766 tap->txa_flags &= ~IEEE80211_AGGR_XCHGPEND;
1771 null_addba_response_timeout(struct ieee80211_node *ni,
1772 struct ieee80211_tx_ampdu *tap)
1777 * Default method for requesting A-MPDU tx aggregation.
1778 * We setup the specified state block and start a timer
1779 * to wait for an ADDBA response frame.
1782 ieee80211_addba_request(struct ieee80211_node *ni,
1783 struct ieee80211_tx_ampdu *tap,
1784 int dialogtoken, int baparamset, int batimeout)
1789 tap->txa_token = dialogtoken;
1790 tap->txa_flags |= IEEE80211_AGGR_IMMEDIATE;
1791 bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ);
1792 tap->txa_wnd = (bufsiz == 0) ?
1793 IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX);
1794 addba_start_timeout(tap);
1799 * Default method for processing an A-MPDU tx aggregation
1800 * response. We shutdown any pending timer and update the
1801 * state block according to the reply.
1804 ieee80211_addba_response(struct ieee80211_node *ni,
1805 struct ieee80211_tx_ampdu *tap,
1806 int status, int baparamset, int batimeout)
1811 addba_stop_timeout(tap);
1812 if (status == IEEE80211_STATUS_SUCCESS) {
1813 bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ);
1814 /* XXX override our request? */
1815 tap->txa_wnd = (bufsiz == 0) ?
1816 IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX);
1818 tid = MS(baparamset, IEEE80211_BAPS_TID);
1819 tap->txa_flags |= IEEE80211_AGGR_RUNNING;
1820 tap->txa_attempts = 0;
1822 /* mark tid so we don't try again */
1823 tap->txa_flags |= IEEE80211_AGGR_NAK;
1829 * Default method for stopping A-MPDU tx aggregation.
1830 * Any timer is cleared and we drain any pending frames.
1833 ieee80211_addba_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap)
1836 addba_stop_timeout(tap);
1837 if (tap->txa_flags & IEEE80211_AGGR_RUNNING) {
1838 /* XXX clear aggregation queue */
1839 tap->txa_flags &= ~IEEE80211_AGGR_RUNNING;
1841 tap->txa_attempts = 0;
1845 * Process a received action frame using the default aggregation
1846 * policy. We intercept ADDBA-related frames and use them to
1847 * update our aggregation state. All other frames are passed up
1848 * for processing by ieee80211_recv_action.
1851 ht_recv_action_ba_addba_request(struct ieee80211_node *ni,
1852 const struct ieee80211_frame *wh,
1853 const uint8_t *frm, const uint8_t *efrm)
1855 struct ieee80211com *ic = ni->ni_ic;
1856 struct ieee80211vap *vap = ni->ni_vap;
1857 struct ieee80211_rx_ampdu *rap;
1858 uint8_t dialogtoken;
1859 uint16_t baparamset, batimeout, baseqctl;
1863 dialogtoken = frm[2];
1864 baparamset = LE_READ_2(frm+3);
1865 batimeout = LE_READ_2(frm+5);
1866 baseqctl = LE_READ_2(frm+7);
1868 tid = MS(baparamset, IEEE80211_BAPS_TID);
1870 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
1871 "recv ADDBA request: dialogtoken %u baparamset 0x%x "
1872 "(tid %d bufsiz %d) batimeout %d baseqctl %d:%d",
1873 dialogtoken, baparamset,
1874 tid, MS(baparamset, IEEE80211_BAPS_BUFSIZ),
1876 MS(baseqctl, IEEE80211_BASEQ_START),
1877 MS(baseqctl, IEEE80211_BASEQ_FRAG));
1879 rap = &ni->ni_rx_ampdu[tid];
1881 /* Send ADDBA response */
1882 args[0] = dialogtoken;
1884 * NB: We ack only if the sta associated with HT and
1885 * the ap is configured to do AMPDU rx (the latter
1886 * violates the 11n spec and is mostly for testing).
1888 if ((ni->ni_flags & IEEE80211_NODE_AMPDU_RX) &&
1889 (vap->iv_flags_ht & IEEE80211_FHT_AMPDU_RX)) {
1890 /* XXX handle ampdu_rx_start failure */
1891 ic->ic_ampdu_rx_start(ni, rap,
1892 baparamset, batimeout, baseqctl);
1894 args[1] = IEEE80211_STATUS_SUCCESS;
1896 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
1897 ni, "reject ADDBA request: %s",
1898 ni->ni_flags & IEEE80211_NODE_AMPDU_RX ?
1899 "administratively disabled" :
1900 "not negotiated for station");
1901 vap->iv_stats.is_addba_reject++;
1902 args[1] = IEEE80211_STATUS_UNSPECIFIED;
1904 /* XXX honor rap flags? */
1905 args[2] = IEEE80211_BAPS_POLICY_IMMEDIATE
1906 | SM(tid, IEEE80211_BAPS_TID)
1907 | SM(rap->rxa_wnd, IEEE80211_BAPS_BUFSIZ)
1911 ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA,
1912 IEEE80211_ACTION_BA_ADDBA_RESPONSE, args);
1917 ht_recv_action_ba_addba_response(struct ieee80211_node *ni,
1918 const struct ieee80211_frame *wh,
1919 const uint8_t *frm, const uint8_t *efrm)
1921 struct ieee80211com *ic = ni->ni_ic;
1922 struct ieee80211vap *vap = ni->ni_vap;
1923 struct ieee80211_tx_ampdu *tap;
1924 uint8_t dialogtoken, policy;
1925 uint16_t baparamset, batimeout, code;
1928 dialogtoken = frm[2];
1929 code = LE_READ_2(frm+3);
1930 baparamset = LE_READ_2(frm+5);
1931 tid = MS(baparamset, IEEE80211_BAPS_TID);
1932 bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ);
1933 policy = MS(baparamset, IEEE80211_BAPS_POLICY);
1934 batimeout = LE_READ_2(frm+7);
1936 tap = &ni->ni_tx_ampdu[tid];
1937 if ((tap->txa_flags & IEEE80211_AGGR_XCHGPEND) == 0) {
1938 IEEE80211_DISCARD_MAC(vap,
1939 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
1940 ni->ni_macaddr, "ADDBA response",
1941 "no pending ADDBA, tid %d dialogtoken %u "
1942 "code %d", tid, dialogtoken, code);
1943 vap->iv_stats.is_addba_norequest++;
1946 if (dialogtoken != tap->txa_token) {
1947 IEEE80211_DISCARD_MAC(vap,
1948 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
1949 ni->ni_macaddr, "ADDBA response",
1950 "dialogtoken mismatch: waiting for %d, "
1951 "received %d, tid %d code %d",
1952 tap->txa_token, dialogtoken, tid, code);
1953 vap->iv_stats.is_addba_badtoken++;
1956 /* NB: assumes IEEE80211_AGGR_IMMEDIATE is 1 */
1957 if (policy != (tap->txa_flags & IEEE80211_AGGR_IMMEDIATE)) {
1958 IEEE80211_DISCARD_MAC(vap,
1959 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
1960 ni->ni_macaddr, "ADDBA response",
1961 "policy mismatch: expecting %s, "
1962 "received %s, tid %d code %d",
1963 tap->txa_flags & IEEE80211_AGGR_IMMEDIATE,
1965 vap->iv_stats.is_addba_badpolicy++;
1969 /* XXX we take MIN in ieee80211_addba_response */
1970 if (bufsiz > IEEE80211_AGGR_BAWMAX) {
1971 IEEE80211_DISCARD_MAC(vap,
1972 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
1973 ni->ni_macaddr, "ADDBA response",
1974 "BA window too large: max %d, "
1975 "received %d, tid %d code %d",
1976 bufsiz, IEEE80211_AGGR_BAWMAX, tid, code);
1977 vap->iv_stats.is_addba_badbawinsize++;
1981 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
1982 "recv ADDBA response: dialogtoken %u code %d "
1983 "baparamset 0x%x (tid %d bufsiz %d) batimeout %d",
1984 dialogtoken, code, baparamset, tid, bufsiz,
1986 ic->ic_addba_response(ni, tap, code, baparamset, batimeout);
1991 ht_recv_action_ba_delba(struct ieee80211_node *ni,
1992 const struct ieee80211_frame *wh,
1993 const uint8_t *frm, const uint8_t *efrm)
1995 struct ieee80211com *ic = ni->ni_ic;
1996 struct ieee80211_rx_ampdu *rap;
1997 struct ieee80211_tx_ampdu *tap;
1998 uint16_t baparamset, code;
2001 baparamset = LE_READ_2(frm+2);
2002 code = LE_READ_2(frm+4);
2004 tid = MS(baparamset, IEEE80211_DELBAPS_TID);
2006 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2007 "recv DELBA: baparamset 0x%x (tid %d initiator %d) "
2008 "code %d", baparamset, tid,
2009 MS(baparamset, IEEE80211_DELBAPS_INIT), code);
2011 if ((baparamset & IEEE80211_DELBAPS_INIT) == 0) {
2012 tap = &ni->ni_tx_ampdu[tid];
2013 ic->ic_addba_stop(ni, tap);
2015 rap = &ni->ni_rx_ampdu[tid];
2016 ic->ic_ampdu_rx_stop(ni, rap);
2022 ht_recv_action_ht_txchwidth(struct ieee80211_node *ni,
2023 const struct ieee80211_frame *wh,
2024 const uint8_t *frm, const uint8_t *efrm)
2028 chw = (frm[2] == IEEE80211_A_HT_TXCHWIDTH_2040) ? 40 : 20;
2030 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2031 "%s: HT txchwidth, width %d%s",
2032 __func__, chw, ni->ni_chw != chw ? "*" : "");
2033 if (chw != ni->ni_chw) {
2035 /* XXX notify on change */
2041 ht_recv_action_ht_mimopwrsave(struct ieee80211_node *ni,
2042 const struct ieee80211_frame *wh,
2043 const uint8_t *frm, const uint8_t *efrm)
2045 const struct ieee80211_action_ht_mimopowersave *mps =
2046 (const struct ieee80211_action_ht_mimopowersave *) frm;
2048 /* XXX check iv_htcaps */
2049 if (mps->am_control & IEEE80211_A_HT_MIMOPWRSAVE_ENA)
2050 ni->ni_flags |= IEEE80211_NODE_MIMO_PS;
2052 ni->ni_flags &= ~IEEE80211_NODE_MIMO_PS;
2053 if (mps->am_control & IEEE80211_A_HT_MIMOPWRSAVE_MODE)
2054 ni->ni_flags |= IEEE80211_NODE_MIMO_RTS;
2056 ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS;
2057 /* XXX notify on change */
2058 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2059 "%s: HT MIMO PS (%s%s)", __func__,
2060 (ni->ni_flags & IEEE80211_NODE_MIMO_PS) ? "on" : "off",
2061 (ni->ni_flags & IEEE80211_NODE_MIMO_RTS) ? "+rts" : ""
2067 * Transmit processing.
2071 * Check if A-MPDU should be requested/enabled for a stream.
2072 * We require a traffic rate above a per-AC threshold and we
2073 * also handle backoff from previous failed attempts.
2075 * Drivers may override this method to bring in information
2076 * such as link state conditions in making the decision.
2079 ieee80211_ampdu_enable(struct ieee80211_node *ni,
2080 struct ieee80211_tx_ampdu *tap)
2082 struct ieee80211vap *vap = ni->ni_vap;
2084 if (tap->txa_avgpps <
2085 vap->iv_ampdu_mintraffic[TID_TO_WME_AC(tap->txa_tid)])
2087 /* XXX check rssi? */
2088 if (tap->txa_attempts >= ieee80211_addba_maxtries &&
2089 ticks < tap->txa_nextrequest) {
2091 * Don't retry too often; txa_nextrequest is set
2092 * to the minimum interval we'll retry after
2093 * ieee80211_addba_maxtries failed attempts are made.
2097 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni,
2098 "enable AMPDU on tid %d (%s), avgpps %d pkts %d",
2099 tap->txa_tid, ieee80211_wme_acnames[TID_TO_WME_AC(tap->txa_tid)],
2100 tap->txa_avgpps, tap->txa_pkts);
2105 * Request A-MPDU tx aggregation. Setup local state and
2106 * issue an ADDBA request. BA use will only happen after
2107 * the other end replies with ADDBA response.
2110 ieee80211_ampdu_request(struct ieee80211_node *ni,
2111 struct ieee80211_tx_ampdu *tap)
2113 struct ieee80211com *ic = ni->ni_ic;
2115 int tid, dialogtoken;
2116 static int tokens = 0; /* XXX */
2119 if ((tap->txa_flags & IEEE80211_AGGR_SETUP) == 0) {
2120 /* do deferred setup of state */
2121 ampdu_tx_setup(tap);
2123 /* XXX hack for not doing proper locking */
2124 tap->txa_flags &= ~IEEE80211_AGGR_NAK;
2126 dialogtoken = (tokens+1) % 63; /* XXX */
2128 tap->txa_start = ni->ni_txseqs[tid];
2130 args[0] = dialogtoken;
2131 args[1] = 0; /* NB: status code not used */
2132 args[2] = IEEE80211_BAPS_POLICY_IMMEDIATE
2133 | SM(tid, IEEE80211_BAPS_TID)
2134 | SM(IEEE80211_AGGR_BAWMAX, IEEE80211_BAPS_BUFSIZ)
2136 args[3] = 0; /* batimeout */
2137 /* NB: do first so there's no race against reply */
2138 if (!ic->ic_addba_request(ni, tap, dialogtoken, args[2], args[3])) {
2139 /* unable to setup state, don't make request */
2140 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
2141 ni, "%s: could not setup BA stream for TID %d AC %d",
2142 __func__, tap->txa_tid, TID_TO_WME_AC(tap->txa_tid));
2143 /* defer next try so we don't slam the driver with requests */
2144 tap->txa_attempts = ieee80211_addba_maxtries;
2145 /* NB: check in case driver wants to override */
2146 if (tap->txa_nextrequest <= ticks)
2147 tap->txa_nextrequest = ticks + ieee80211_addba_backoff;
2150 tokens = dialogtoken; /* allocate token */
2151 /* NB: after calling ic_addba_request so driver can set txa_start */
2152 args[4] = SM(tap->txa_start, IEEE80211_BASEQ_START)
2153 | SM(0, IEEE80211_BASEQ_FRAG)
2155 return ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA,
2156 IEEE80211_ACTION_BA_ADDBA_REQUEST, args);
2160 * Terminate an AMPDU tx stream. State is reclaimed
2161 * and the peer notified with a DelBA Action frame.
2164 ieee80211_ampdu_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap,
2167 struct ieee80211com *ic = ni->ni_ic;
2168 struct ieee80211vap *vap = ni->ni_vap;
2172 tap->txa_flags &= ~IEEE80211_AGGR_BARPEND;
2173 if (IEEE80211_AMPDU_RUNNING(tap)) {
2174 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
2175 ni, "%s: stop BA stream for TID %d (reason %d)",
2176 __func__, tap->txa_tid, reason);
2177 vap->iv_stats.is_ampdu_stop++;
2179 ic->ic_addba_stop(ni, tap);
2180 args[0] = tap->txa_tid;
2181 args[1] = IEEE80211_DELBAPS_INIT;
2182 args[2] = reason; /* XXX reason code */
2183 ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA,
2184 IEEE80211_ACTION_BA_DELBA, args);
2186 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
2187 ni, "%s: BA stream for TID %d not running (reason %d)",
2188 __func__, tap->txa_tid, reason);
2189 vap->iv_stats.is_ampdu_stop_failed++;
2194 static void bar_start_timer(struct ieee80211_tx_ampdu *tap);
2197 bar_timeout(void *arg)
2199 struct ieee80211_tx_ampdu *tap = arg;
2200 struct ieee80211_node *ni = tap->txa_ni;
2202 KASSERT((tap->txa_flags & IEEE80211_AGGR_XCHGPEND) == 0,
2203 ("bar/addba collision, flags 0x%x", tap->txa_flags));
2205 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
2206 ni, "%s: tid %u flags 0x%x attempts %d", __func__,
2207 tap->txa_tid, tap->txa_flags, tap->txa_attempts);
2209 /* guard against race with bar_tx_complete */
2210 if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) == 0)
2213 if (tap->txa_attempts >= ieee80211_bar_maxtries) {
2214 struct ieee80211com *ic = ni->ni_ic;
2216 ni->ni_vap->iv_stats.is_ampdu_bar_tx_fail++;
2218 * If (at least) the last BAR TX timeout was due to
2219 * an ieee80211_send_bar() failures, then we need
2220 * to make sure we notify the driver that a BAR
2221 * TX did occur and fail. This gives the driver
2222 * a chance to undo any queue pause that may
2225 ic->ic_bar_response(ni, tap, 1);
2226 ieee80211_ampdu_stop(ni, tap, IEEE80211_REASON_TIMEOUT);
2228 ni->ni_vap->iv_stats.is_ampdu_bar_tx_retry++;
2229 if (ieee80211_send_bar(ni, tap, tap->txa_seqpending) != 0) {
2230 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
2231 ni, "%s: failed to TX, starting timer\n",
2234 * If ieee80211_send_bar() fails here, the
2235 * timer may have stopped and/or the pending
2236 * flag may be clear. Because of this,
2237 * fake the BARPEND and reset the timer.
2238 * A retransmission attempt will then occur
2239 * during the next timeout.
2242 tap->txa_flags |= IEEE80211_AGGR_BARPEND;
2243 bar_start_timer(tap);
2249 bar_start_timer(struct ieee80211_tx_ampdu *tap)
2251 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N,
2255 callout_reset(&tap->txa_timer, ieee80211_bar_timeout, bar_timeout, tap);
2259 bar_stop_timer(struct ieee80211_tx_ampdu *tap)
2261 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N,
2265 callout_stop(&tap->txa_timer);
2269 bar_tx_complete(struct ieee80211_node *ni, void *arg, int status)
2271 struct ieee80211_tx_ampdu *tap = arg;
2273 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
2274 ni, "%s: tid %u flags 0x%x pending %d status %d",
2275 __func__, tap->txa_tid, tap->txa_flags,
2276 callout_pending(&tap->txa_timer), status);
2278 ni->ni_vap->iv_stats.is_ampdu_bar_tx++;
2280 if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) &&
2281 callout_pending(&tap->txa_timer)) {
2282 struct ieee80211com *ic = ni->ni_ic;
2284 if (status == 0) /* ACK'd */
2285 bar_stop_timer(tap);
2286 ic->ic_bar_response(ni, tap, status);
2287 /* NB: just let timer expire so we pace requests */
2292 ieee80211_bar_response(struct ieee80211_node *ni,
2293 struct ieee80211_tx_ampdu *tap, int status)
2296 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N,
2300 if (status == 0) { /* got ACK */
2301 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
2302 ni, "BAR moves BA win <%u:%u> (%u frames) txseq %u tid %u",
2304 IEEE80211_SEQ_ADD(tap->txa_start, tap->txa_wnd-1),
2305 tap->txa_qframes, tap->txa_seqpending,
2308 /* NB: timer already stopped in bar_tx_complete */
2309 tap->txa_start = tap->txa_seqpending;
2310 tap->txa_flags &= ~IEEE80211_AGGR_BARPEND;
2315 * Transmit a BAR frame to the specified node. The
2316 * BAR contents are drawn from the supplied aggregation
2317 * state associated with the node.
2319 * NB: we only handle immediate ACK w/ compressed bitmap.
2322 ieee80211_send_bar(struct ieee80211_node *ni,
2323 struct ieee80211_tx_ampdu *tap, ieee80211_seq seq)
2325 #define senderr(_x, _v) do { vap->iv_stats._v++; ret = _x; goto bad; } while (0)
2326 struct ieee80211vap *vap = ni->ni_vap;
2327 struct ieee80211com *ic = ni->ni_ic;
2328 struct ieee80211_frame_bar *bar;
2330 uint16_t barctl, barseqctl;
2335 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N,
2340 if ((tap->txa_flags & IEEE80211_AGGR_RUNNING) == 0) {
2341 /* no ADDBA response, should not happen */
2346 bar_stop_timer(tap);
2348 ieee80211_ref_node(ni);
2350 m = ieee80211_getmgtframe(&frm, ic->ic_headroom, sizeof(*bar));
2352 senderr(ENOMEM, is_tx_nobuf);
2354 if (!ieee80211_add_callback(m, bar_tx_complete, tap)) {
2356 senderr(ENOMEM, is_tx_nobuf); /* XXX */
2360 bar = mtod(m, struct ieee80211_frame_bar *);
2361 bar->i_fc[0] = IEEE80211_FC0_VERSION_0 |
2362 IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_BAR;
2364 IEEE80211_ADDR_COPY(bar->i_ra, ni->ni_macaddr);
2365 IEEE80211_ADDR_COPY(bar->i_ta, vap->iv_myaddr);
2368 barctl = (tap->txa_flags & IEEE80211_AGGR_IMMEDIATE ?
2369 0 : IEEE80211_BAR_NOACK)
2370 | IEEE80211_BAR_COMP
2371 | SM(tid, IEEE80211_BAR_TID)
2373 barseqctl = SM(seq, IEEE80211_BAR_SEQ_START);
2374 /* NB: known to have proper alignment */
2375 bar->i_ctl = htole16(barctl);
2376 bar->i_seq = htole16(barseqctl);
2377 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_bar);
2379 M_WME_SETAC(m, WME_AC_VO);
2381 IEEE80211_NODE_STAT(ni, tx_mgmt); /* XXX tx_ctl? */
2384 /* init/bump attempts counter */
2385 if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) == 0)
2386 tap->txa_attempts = 1;
2388 tap->txa_attempts++;
2389 tap->txa_seqpending = seq;
2390 tap->txa_flags |= IEEE80211_AGGR_BARPEND;
2392 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_11N,
2393 ni, "send BAR: tid %u ctl 0x%x start %u (attempt %d)",
2394 tid, barctl, seq, tap->txa_attempts);
2397 * ic_raw_xmit will free the node reference
2398 * regardless of queue/TX success or failure.
2400 IEEE80211_TX_LOCK(ic);
2401 ret = ieee80211_raw_output(vap, ni, m, NULL);
2402 IEEE80211_TX_UNLOCK(ic);
2404 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_11N,
2405 ni, "send BAR: failed: (ret = %d)\n",
2407 /* xmit failed, clear state flag */
2408 tap->txa_flags &= ~IEEE80211_AGGR_BARPEND;
2409 vap->iv_stats.is_ampdu_bar_tx_fail++;
2412 /* XXX hack against tx complete happening before timer is started */
2413 if (tap->txa_flags & IEEE80211_AGGR_BARPEND)
2414 bar_start_timer(tap);
2417 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N,
2421 vap->iv_stats.is_ampdu_bar_tx_fail++;
2422 ieee80211_free_node(ni);
2428 ht_action_output(struct ieee80211_node *ni, struct mbuf *m)
2430 struct ieee80211_bpf_params params;
2432 memset(¶ms, 0, sizeof(params));
2433 params.ibp_pri = WME_AC_VO;
2434 params.ibp_rate0 = ni->ni_txparms->mgmtrate;
2435 /* NB: we know all frames are unicast */
2436 params.ibp_try0 = ni->ni_txparms->maxretry;
2437 params.ibp_power = ni->ni_txpower;
2438 return ieee80211_mgmt_output(ni, m, IEEE80211_FC0_SUBTYPE_ACTION,
2442 #define ADDSHORT(frm, v) do { \
2443 frm[0] = (v) & 0xff; \
2444 frm[1] = (v) >> 8; \
2449 * Send an action management frame. The arguments are stuff
2450 * into a frame without inspection; the caller is assumed to
2451 * prepare them carefully (e.g. based on the aggregation state).
2454 ht_send_action_ba_addba(struct ieee80211_node *ni,
2455 int category, int action, void *arg0)
2457 struct ieee80211vap *vap = ni->ni_vap;
2458 struct ieee80211com *ic = ni->ni_ic;
2459 uint16_t *args = arg0;
2463 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2464 "send ADDBA %s: dialogtoken %d status %d "
2465 "baparamset 0x%x (tid %d) batimeout 0x%x baseqctl 0x%x",
2466 (action == IEEE80211_ACTION_BA_ADDBA_REQUEST) ?
2467 "request" : "response",
2468 args[0], args[1], args[2], MS(args[2], IEEE80211_BAPS_TID),
2471 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2472 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2473 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2474 ieee80211_ref_node(ni);
2476 m = ieee80211_getmgtframe(&frm,
2477 ic->ic_headroom + sizeof(struct ieee80211_frame),
2478 sizeof(uint16_t) /* action+category */
2479 /* XXX may action payload */
2480 + sizeof(struct ieee80211_action_ba_addbaresponse)
2485 *frm++ = args[0]; /* dialog token */
2486 if (action == IEEE80211_ACTION_BA_ADDBA_RESPONSE)
2487 ADDSHORT(frm, args[1]); /* status code */
2488 ADDSHORT(frm, args[2]); /* baparamset */
2489 ADDSHORT(frm, args[3]); /* batimeout */
2490 if (action == IEEE80211_ACTION_BA_ADDBA_REQUEST)
2491 ADDSHORT(frm, args[4]); /* baseqctl */
2492 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2493 return ht_action_output(ni, m);
2495 vap->iv_stats.is_tx_nobuf++;
2496 ieee80211_free_node(ni);
2502 ht_send_action_ba_delba(struct ieee80211_node *ni,
2503 int category, int action, void *arg0)
2505 struct ieee80211vap *vap = ni->ni_vap;
2506 struct ieee80211com *ic = ni->ni_ic;
2507 uint16_t *args = arg0;
2509 uint16_t baparamset;
2512 baparamset = SM(args[0], IEEE80211_DELBAPS_TID)
2515 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2516 "send DELBA action: tid %d, initiator %d reason %d",
2517 args[0], args[1], args[2]);
2519 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2520 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2521 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2522 ieee80211_ref_node(ni);
2524 m = ieee80211_getmgtframe(&frm,
2525 ic->ic_headroom + sizeof(struct ieee80211_frame),
2526 sizeof(uint16_t) /* action+category */
2527 /* XXX may action payload */
2528 + sizeof(struct ieee80211_action_ba_addbaresponse)
2533 ADDSHORT(frm, baparamset);
2534 ADDSHORT(frm, args[2]); /* reason code */
2535 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2536 return ht_action_output(ni, m);
2538 vap->iv_stats.is_tx_nobuf++;
2539 ieee80211_free_node(ni);
2545 ht_send_action_ht_txchwidth(struct ieee80211_node *ni,
2546 int category, int action, void *arg0)
2548 struct ieee80211vap *vap = ni->ni_vap;
2549 struct ieee80211com *ic = ni->ni_ic;
2553 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2554 "send HT txchwidth: width %d",
2555 IEEE80211_IS_CHAN_HT40(ni->ni_chan) ? 40 : 20);
2557 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2558 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2559 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2560 ieee80211_ref_node(ni);
2562 m = ieee80211_getmgtframe(&frm,
2563 ic->ic_headroom + sizeof(struct ieee80211_frame),
2564 sizeof(uint16_t) /* action+category */
2565 /* XXX may action payload */
2566 + sizeof(struct ieee80211_action_ba_addbaresponse)
2571 *frm++ = IEEE80211_IS_CHAN_HT40(ni->ni_chan) ?
2572 IEEE80211_A_HT_TXCHWIDTH_2040 :
2573 IEEE80211_A_HT_TXCHWIDTH_20;
2574 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2575 return ht_action_output(ni, m);
2577 vap->iv_stats.is_tx_nobuf++;
2578 ieee80211_free_node(ni);
2585 * Construct the MCS bit mask for inclusion in an HT capabilities
2586 * information element.
2589 ieee80211_set_mcsset(struct ieee80211com *ic, uint8_t *frm)
2594 KASSERT((ic->ic_rxstream > 0 && ic->ic_rxstream <= 4),
2595 ("ic_rxstream %d out of range", ic->ic_rxstream));
2596 KASSERT((ic->ic_txstream > 0 && ic->ic_txstream <= 4),
2597 ("ic_txstream %d out of range", ic->ic_txstream));
2599 for (i = 0; i < ic->ic_rxstream * 8; i++)
2601 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) &&
2602 (ic->ic_htcaps & IEEE80211_HTC_RXMCS32))
2604 if (ic->ic_htcaps & IEEE80211_HTC_RXUNEQUAL) {
2605 if (ic->ic_rxstream >= 2) {
2606 for (i = 33; i <= 38; i++)
2609 if (ic->ic_rxstream >= 3) {
2610 for (i = 39; i <= 52; i++)
2613 if (ic->ic_txstream >= 4) {
2614 for (i = 53; i <= 76; i++)
2619 if (ic->ic_rxstream != ic->ic_txstream) {
2620 txparams = 0x1; /* TX MCS set defined */
2621 txparams |= 0x2; /* TX RX MCS not equal */
2622 txparams |= (ic->ic_txstream - 1) << 2; /* num TX streams */
2623 if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL)
2624 txparams |= 0x16; /* TX unequal modulation sup */
2631 * Add body of an HTCAP information element.
2634 ieee80211_add_htcap_body(uint8_t *frm, struct ieee80211_node *ni)
2636 #define ADDSHORT(frm, v) do { \
2637 frm[0] = (v) & 0xff; \
2638 frm[1] = (v) >> 8; \
2641 struct ieee80211com *ic = ni->ni_ic;
2642 struct ieee80211vap *vap = ni->ni_vap;
2643 uint16_t caps, extcaps;
2646 /* HT capabilities */
2647 caps = vap->iv_htcaps & 0xffff;
2649 * Note channel width depends on whether we are operating as
2650 * a sta or not. When operating as a sta we are generating
2651 * a request based on our desired configuration. Otherwise
2652 * we are operational and the channel attributes identify
2653 * how we've been setup (which might be different if a fixed
2654 * channel is specified).
2656 if (vap->iv_opmode == IEEE80211_M_STA) {
2657 /* override 20/40 use based on config */
2658 if (vap->iv_flags_ht & IEEE80211_FHT_USEHT40)
2659 caps |= IEEE80211_HTCAP_CHWIDTH40;
2661 caps &= ~IEEE80211_HTCAP_CHWIDTH40;
2663 /* Start by using the advertised settings */
2664 rxmax = MS(ni->ni_htparam, IEEE80211_HTCAP_MAXRXAMPDU);
2665 density = MS(ni->ni_htparam, IEEE80211_HTCAP_MPDUDENSITY);
2667 /* Cap at VAP rxmax */
2668 if (rxmax > vap->iv_ampdu_rxmax)
2669 rxmax = vap->iv_ampdu_rxmax;
2672 * If the VAP ampdu density value greater, use that.
2674 * (Larger density value == larger minimum gap between A-MPDU
2677 if (vap->iv_ampdu_density > density)
2678 density = vap->iv_ampdu_density;
2681 * NB: Hardware might support HT40 on some but not all
2682 * channels. We can't determine this earlier because only
2683 * after association the channel is upgraded to HT based
2684 * on the negotiated capabilities.
2686 if (ni->ni_chan != IEEE80211_CHAN_ANYC &&
2687 findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT40U) == NULL &&
2688 findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT40D) == NULL)
2689 caps &= ~IEEE80211_HTCAP_CHWIDTH40;
2691 /* override 20/40 use based on current channel */
2692 if (IEEE80211_IS_CHAN_HT40(ni->ni_chan))
2693 caps |= IEEE80211_HTCAP_CHWIDTH40;
2695 caps &= ~IEEE80211_HTCAP_CHWIDTH40;
2697 /* XXX TODO should it start by using advertised settings? */
2698 rxmax = vap->iv_ampdu_rxmax;
2699 density = vap->iv_ampdu_density;
2702 /* adjust short GI based on channel and config */
2703 if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20) == 0)
2704 caps &= ~IEEE80211_HTCAP_SHORTGI20;
2705 if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40) == 0 ||
2706 (caps & IEEE80211_HTCAP_CHWIDTH40) == 0)
2707 caps &= ~IEEE80211_HTCAP_SHORTGI40;
2708 ADDSHORT(frm, caps);
2711 *frm = SM(rxmax, IEEE80211_HTCAP_MAXRXAMPDU)
2712 | SM(density, IEEE80211_HTCAP_MPDUDENSITY)
2716 /* pre-zero remainder of ie */
2717 memset(frm, 0, sizeof(struct ieee80211_ie_htcap) -
2718 __offsetof(struct ieee80211_ie_htcap, hc_mcsset));
2720 /* supported MCS set */
2722 * XXX: For sta mode the rate set should be restricted based
2723 * on the AP's capabilities, but ni_htrates isn't setup when
2724 * we're called to form an AssocReq frame so for now we're
2725 * restricted to the device capabilities.
2727 ieee80211_set_mcsset(ni->ni_ic, frm);
2729 frm += __offsetof(struct ieee80211_ie_htcap, hc_extcap) -
2730 __offsetof(struct ieee80211_ie_htcap, hc_mcsset);
2732 /* HT extended capabilities */
2733 extcaps = vap->iv_htextcaps & 0xffff;
2735 ADDSHORT(frm, extcaps);
2737 frm += sizeof(struct ieee80211_ie_htcap) -
2738 __offsetof(struct ieee80211_ie_htcap, hc_txbf);
2745 * Add 802.11n HT capabilities information element
2748 ieee80211_add_htcap(uint8_t *frm, struct ieee80211_node *ni)
2750 frm[0] = IEEE80211_ELEMID_HTCAP;
2751 frm[1] = sizeof(struct ieee80211_ie_htcap) - 2;
2752 return ieee80211_add_htcap_body(frm + 2, ni);
2756 * Add Broadcom OUI wrapped standard HTCAP ie; this is
2757 * used for compatibility w/ pre-draft implementations.
2760 ieee80211_add_htcap_vendor(uint8_t *frm, struct ieee80211_node *ni)
2762 frm[0] = IEEE80211_ELEMID_VENDOR;
2763 frm[1] = 4 + sizeof(struct ieee80211_ie_htcap) - 2;
2764 frm[2] = (BCM_OUI >> 0) & 0xff;
2765 frm[3] = (BCM_OUI >> 8) & 0xff;
2766 frm[4] = (BCM_OUI >> 16) & 0xff;
2767 frm[5] = BCM_OUI_HTCAP;
2768 return ieee80211_add_htcap_body(frm + 6, ni);
2772 * Construct the MCS bit mask of basic rates
2773 * for inclusion in an HT information element.
2776 ieee80211_set_basic_htrates(uint8_t *frm, const struct ieee80211_htrateset *rs)
2780 for (i = 0; i < rs->rs_nrates; i++) {
2781 int r = rs->rs_rates[i] & IEEE80211_RATE_VAL;
2782 if ((rs->rs_rates[i] & IEEE80211_RATE_BASIC) &&
2783 r < IEEE80211_HTRATE_MAXSIZE) {
2784 /* NB: this assumes a particular implementation */
2791 * Update the HTINFO ie for a beacon frame.
2794 ieee80211_ht_update_beacon(struct ieee80211vap *vap,
2795 struct ieee80211_beacon_offsets *bo)
2797 #define PROTMODE (IEEE80211_HTINFO_OPMODE|IEEE80211_HTINFO_NONHT_PRESENT)
2798 struct ieee80211_node *ni;
2799 const struct ieee80211_channel *bsschan;
2800 struct ieee80211com *ic = vap->iv_ic;
2801 struct ieee80211_ie_htinfo *ht =
2802 (struct ieee80211_ie_htinfo *) bo->bo_htinfo;
2804 ni = ieee80211_ref_node(vap->iv_bss);
2805 bsschan = ni->ni_chan;
2807 /* XXX only update on channel change */
2808 ht->hi_ctrlchannel = ieee80211_chan2ieee(ic, bsschan);
2809 if (vap->iv_flags_ht & IEEE80211_FHT_RIFS)
2810 ht->hi_byte1 = IEEE80211_HTINFO_RIFSMODE_PERM;
2812 ht->hi_byte1 = IEEE80211_HTINFO_RIFSMODE_PROH;
2813 if (IEEE80211_IS_CHAN_HT40U(bsschan))
2814 ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_ABOVE;
2815 else if (IEEE80211_IS_CHAN_HT40D(bsschan))
2816 ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_BELOW;
2818 ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_NONE;
2819 if (IEEE80211_IS_CHAN_HT40(bsschan))
2820 ht->hi_byte1 |= IEEE80211_HTINFO_TXWIDTH_2040;
2822 /* protection mode */
2823 ht->hi_byte2 = (ht->hi_byte2 &~ PROTMODE) | ic->ic_curhtprotmode;
2825 ieee80211_free_node(ni);
2827 /* XXX propagate to vendor ie's */
2832 * Add body of an HTINFO information element.
2834 * NB: We don't use struct ieee80211_ie_htinfo because we can
2835 * be called to fillin both a standard ie and a compat ie that
2836 * has a vendor OUI at the front.
2839 ieee80211_add_htinfo_body(uint8_t *frm, struct ieee80211_node *ni)
2841 struct ieee80211vap *vap = ni->ni_vap;
2842 struct ieee80211com *ic = ni->ni_ic;
2844 /* pre-zero remainder of ie */
2845 memset(frm, 0, sizeof(struct ieee80211_ie_htinfo) - 2);
2847 /* primary/control channel center */
2848 *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan);
2850 if (vap->iv_flags_ht & IEEE80211_FHT_RIFS)
2851 frm[0] = IEEE80211_HTINFO_RIFSMODE_PERM;
2853 frm[0] = IEEE80211_HTINFO_RIFSMODE_PROH;
2854 if (IEEE80211_IS_CHAN_HT40U(ni->ni_chan))
2855 frm[0] |= IEEE80211_HTINFO_2NDCHAN_ABOVE;
2856 else if (IEEE80211_IS_CHAN_HT40D(ni->ni_chan))
2857 frm[0] |= IEEE80211_HTINFO_2NDCHAN_BELOW;
2859 frm[0] |= IEEE80211_HTINFO_2NDCHAN_NONE;
2860 if (IEEE80211_IS_CHAN_HT40(ni->ni_chan))
2861 frm[0] |= IEEE80211_HTINFO_TXWIDTH_2040;
2863 frm[1] = ic->ic_curhtprotmode;
2868 ieee80211_set_basic_htrates(frm, &ni->ni_htrates);
2869 frm += sizeof(struct ieee80211_ie_htinfo) -
2870 __offsetof(struct ieee80211_ie_htinfo, hi_basicmcsset);
2875 * Add 802.11n HT information information element.
2878 ieee80211_add_htinfo(uint8_t *frm, struct ieee80211_node *ni)
2880 frm[0] = IEEE80211_ELEMID_HTINFO;
2881 frm[1] = sizeof(struct ieee80211_ie_htinfo) - 2;
2882 return ieee80211_add_htinfo_body(frm + 2, ni);
2886 * Add Broadcom OUI wrapped standard HTINFO ie; this is
2887 * used for compatibility w/ pre-draft implementations.
2890 ieee80211_add_htinfo_vendor(uint8_t *frm, struct ieee80211_node *ni)
2892 frm[0] = IEEE80211_ELEMID_VENDOR;
2893 frm[1] = 4 + sizeof(struct ieee80211_ie_htinfo) - 2;
2894 frm[2] = (BCM_OUI >> 0) & 0xff;
2895 frm[3] = (BCM_OUI >> 8) & 0xff;
2896 frm[4] = (BCM_OUI >> 16) & 0xff;
2897 frm[5] = BCM_OUI_HTINFO;
2898 return ieee80211_add_htinfo_body(frm + 6, ni);