2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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.
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.
28 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
34 * IEEE 802.11n protocol support.
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>
46 #include <sys/socket.h>
49 #include <net/if_var.h>
50 #include <net/if_media.h>
51 #include <net/ethernet.h>
53 #include <net80211/ieee80211_var.h>
54 #include <net80211/ieee80211_action.h>
55 #include <net80211/ieee80211_input.h>
57 /* define here, used throughout file */
58 #define MS(_v, _f) (((_v) & _f) >> _f##_S)
59 #define SM(_v, _f) (((_v) << _f##_S) & _f)
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 */
141 static int ieee80211_ampdu_age = -1; /* threshold for ampdu reorder q (ms) */
142 SYSCTL_PROC(_net_wlan, OID_AUTO, ampdu_age,
143 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
144 &ieee80211_ampdu_age, 0, ieee80211_sysctl_msecs_ticks, "I",
145 "AMPDU max reorder age (ms)");
147 static int ieee80211_recv_bar_ena = 1;
148 SYSCTL_INT(_net_wlan, OID_AUTO, recv_bar, CTLFLAG_RW, &ieee80211_recv_bar_ena,
149 0, "BAR frame processing (ena/dis)");
151 static int ieee80211_addba_timeout = -1;/* timeout for ADDBA response */
152 SYSCTL_PROC(_net_wlan, OID_AUTO, addba_timeout,
153 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
154 &ieee80211_addba_timeout, 0, ieee80211_sysctl_msecs_ticks, "I",
155 "ADDBA request timeout (ms)");
156 static int ieee80211_addba_backoff = -1;/* backoff after max ADDBA requests */
157 SYSCTL_PROC(_net_wlan, OID_AUTO, addba_backoff,
158 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
159 &ieee80211_addba_backoff, 0, ieee80211_sysctl_msecs_ticks, "I",
160 "ADDBA request backoff (ms)");
161 static int ieee80211_addba_maxtries = 3;/* max ADDBA requests before backoff */
162 SYSCTL_INT(_net_wlan, OID_AUTO, addba_maxtries, CTLFLAG_RW,
163 &ieee80211_addba_maxtries, 0, "max ADDBA requests sent before backoff");
165 static int ieee80211_bar_timeout = -1; /* timeout waiting for BAR response */
166 static int ieee80211_bar_maxtries = 50;/* max BAR requests before DELBA */
168 static ieee80211_recv_action_func ht_recv_action_ba_addba_request;
169 static ieee80211_recv_action_func ht_recv_action_ba_addba_response;
170 static ieee80211_recv_action_func ht_recv_action_ba_delba;
171 static ieee80211_recv_action_func ht_recv_action_ht_mimopwrsave;
172 static ieee80211_recv_action_func ht_recv_action_ht_txchwidth;
174 static ieee80211_send_action_func ht_send_action_ba_addba;
175 static ieee80211_send_action_func ht_send_action_ba_delba;
176 static ieee80211_send_action_func ht_send_action_ht_txchwidth;
179 ieee80211_ht_init(void)
182 * Setup HT parameters that depends on the clock frequency.
184 ieee80211_ampdu_age = msecs_to_ticks(500);
185 ieee80211_addba_timeout = msecs_to_ticks(250);
186 ieee80211_addba_backoff = msecs_to_ticks(10*1000);
187 ieee80211_bar_timeout = msecs_to_ticks(250);
189 * Register action frame handlers.
191 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA,
192 IEEE80211_ACTION_BA_ADDBA_REQUEST, ht_recv_action_ba_addba_request);
193 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA,
194 IEEE80211_ACTION_BA_ADDBA_RESPONSE, ht_recv_action_ba_addba_response);
195 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA,
196 IEEE80211_ACTION_BA_DELBA, ht_recv_action_ba_delba);
197 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_HT,
198 IEEE80211_ACTION_HT_MIMOPWRSAVE, ht_recv_action_ht_mimopwrsave);
199 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_HT,
200 IEEE80211_ACTION_HT_TXCHWIDTH, ht_recv_action_ht_txchwidth);
202 ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA,
203 IEEE80211_ACTION_BA_ADDBA_REQUEST, ht_send_action_ba_addba);
204 ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA,
205 IEEE80211_ACTION_BA_ADDBA_RESPONSE, ht_send_action_ba_addba);
206 ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA,
207 IEEE80211_ACTION_BA_DELBA, ht_send_action_ba_delba);
208 ieee80211_send_action_register(IEEE80211_ACTION_CAT_HT,
209 IEEE80211_ACTION_HT_TXCHWIDTH, ht_send_action_ht_txchwidth);
211 SYSINIT(wlan_ht, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_ht_init, NULL);
213 static int ieee80211_ampdu_enable(struct ieee80211_node *ni,
214 struct ieee80211_tx_ampdu *tap);
215 static int ieee80211_addba_request(struct ieee80211_node *ni,
216 struct ieee80211_tx_ampdu *tap,
217 int dialogtoken, int baparamset, int batimeout);
218 static int ieee80211_addba_response(struct ieee80211_node *ni,
219 struct ieee80211_tx_ampdu *tap,
220 int code, int baparamset, int batimeout);
221 static void ieee80211_addba_stop(struct ieee80211_node *ni,
222 struct ieee80211_tx_ampdu *tap);
223 static void null_addba_response_timeout(struct ieee80211_node *ni,
224 struct ieee80211_tx_ampdu *tap);
226 static void ieee80211_bar_response(struct ieee80211_node *ni,
227 struct ieee80211_tx_ampdu *tap, int status);
228 static void ampdu_tx_stop(struct ieee80211_tx_ampdu *tap);
229 static void bar_stop_timer(struct ieee80211_tx_ampdu *tap);
230 static int ampdu_rx_start(struct ieee80211_node *, struct ieee80211_rx_ampdu *,
231 int baparamset, int batimeout, int baseqctl);
232 static void ampdu_rx_stop(struct ieee80211_node *, struct ieee80211_rx_ampdu *);
235 ieee80211_ht_attach(struct ieee80211com *ic)
237 /* setup default aggregation policy */
238 ic->ic_recv_action = ieee80211_recv_action;
239 ic->ic_send_action = ieee80211_send_action;
240 ic->ic_ampdu_enable = ieee80211_ampdu_enable;
241 ic->ic_addba_request = ieee80211_addba_request;
242 ic->ic_addba_response = ieee80211_addba_response;
243 ic->ic_addba_response_timeout = null_addba_response_timeout;
244 ic->ic_addba_stop = ieee80211_addba_stop;
245 ic->ic_bar_response = ieee80211_bar_response;
246 ic->ic_ampdu_rx_start = ampdu_rx_start;
247 ic->ic_ampdu_rx_stop = ampdu_rx_stop;
249 ic->ic_htprotmode = IEEE80211_PROT_RTSCTS;
250 ic->ic_curhtprotmode = IEEE80211_HTINFO_OPMODE_PURE;
254 ieee80211_ht_detach(struct ieee80211com *ic)
259 ieee80211_ht_vattach(struct ieee80211vap *vap)
262 /* driver can override defaults */
263 vap->iv_ampdu_rxmax = IEEE80211_HTCAP_MAXRXAMPDU_8K;
264 vap->iv_ampdu_density = IEEE80211_HTCAP_MPDUDENSITY_NA;
265 vap->iv_ampdu_limit = vap->iv_ampdu_rxmax;
266 vap->iv_amsdu_limit = vap->iv_htcaps & IEEE80211_HTCAP_MAXAMSDU;
267 /* tx aggregation traffic thresholds */
268 vap->iv_ampdu_mintraffic[WME_AC_BK] = 128;
269 vap->iv_ampdu_mintraffic[WME_AC_BE] = 64;
270 vap->iv_ampdu_mintraffic[WME_AC_VO] = 32;
271 vap->iv_ampdu_mintraffic[WME_AC_VI] = 32;
273 if (vap->iv_htcaps & IEEE80211_HTC_HT) {
275 * Device is HT capable; enable all HT-related
276 * facilities by default.
277 * XXX these choices may be too aggressive.
279 vap->iv_flags_ht |= IEEE80211_FHT_HT
280 | IEEE80211_FHT_HTCOMPAT
282 if (vap->iv_htcaps & IEEE80211_HTCAP_SHORTGI20)
283 vap->iv_flags_ht |= IEEE80211_FHT_SHORTGI20;
284 /* XXX infer from channel list? */
285 if (vap->iv_htcaps & IEEE80211_HTCAP_CHWIDTH40) {
286 vap->iv_flags_ht |= IEEE80211_FHT_USEHT40;
287 if (vap->iv_htcaps & IEEE80211_HTCAP_SHORTGI40)
288 vap->iv_flags_ht |= IEEE80211_FHT_SHORTGI40;
290 /* enable RIFS if capable */
291 if (vap->iv_htcaps & IEEE80211_HTC_RIFS)
292 vap->iv_flags_ht |= IEEE80211_FHT_RIFS;
294 /* NB: A-MPDU and A-MSDU rx are mandated, these are tx only */
295 vap->iv_flags_ht |= IEEE80211_FHT_AMPDU_RX;
296 if (vap->iv_htcaps & IEEE80211_HTC_AMPDU)
297 vap->iv_flags_ht |= IEEE80211_FHT_AMPDU_TX;
298 vap->iv_flags_ht |= IEEE80211_FHT_AMSDU_RX;
299 if (vap->iv_htcaps & IEEE80211_HTC_AMSDU)
300 vap->iv_flags_ht |= IEEE80211_FHT_AMSDU_TX;
302 if (vap->iv_htcaps & IEEE80211_HTCAP_TXSTBC)
303 vap->iv_flags_ht |= IEEE80211_FHT_STBC_TX;
304 if (vap->iv_htcaps & IEEE80211_HTCAP_RXSTBC)
305 vap->iv_flags_ht |= IEEE80211_FHT_STBC_RX;
307 if (vap->iv_htcaps & IEEE80211_HTCAP_LDPC)
308 vap->iv_flags_ht |= IEEE80211_FHT_LDPC_RX;
309 if (vap->iv_htcaps & IEEE80211_HTC_TXLDPC)
310 vap->iv_flags_ht |= IEEE80211_FHT_LDPC_TX;
312 /* NB: disable default legacy WDS, too many issues right now */
313 if (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY)
314 vap->iv_flags_ht &= ~IEEE80211_FHT_HT;
318 ieee80211_ht_vdetach(struct ieee80211vap *vap)
323 ht_getrate(struct ieee80211com *ic, int index, enum ieee80211_phymode mode,
328 mword = ieee80211_rate2media(ic, index | IEEE80211_RATE_MCS, mode);
329 if (IFM_SUBTYPE(mword) != IFM_IEEE80211_MCS)
333 rate = ieee80211_htrates[index].ht20_rate_800ns;
336 rate = ieee80211_htrates[index].ht20_rate_400ns;
339 rate = ieee80211_htrates[index].ht40_rate_800ns;
342 rate = ieee80211_htrates[index].ht40_rate_400ns;
348 static struct printranges {
359 { 32, 0, 1, 2, IEEE80211_HTC_TXMCS32 },
360 { 33, 38, 2, 0, IEEE80211_HTC_TXUNEQUAL },
361 { 39, 52, 3, 0, IEEE80211_HTC_TXUNEQUAL },
362 { 53, 76, 4, 0, IEEE80211_HTC_TXUNEQUAL },
367 ht_rateprint(struct ieee80211com *ic, enum ieee80211_phymode mode, int ratetype)
369 int minrate, maxrate;
370 struct printranges *range;
372 for (range = ranges; range->txstream != 0; range++) {
373 if (ic->ic_txstream < range->txstream)
375 if (range->htcapflags &&
376 (ic->ic_htcaps & range->htcapflags) == 0)
378 if (ratetype < range->ratetype)
380 minrate = ht_getrate(ic, range->minmcs, mode, ratetype);
381 maxrate = ht_getrate(ic, range->maxmcs, mode, ratetype);
383 ic_printf(ic, "MCS %d-%d: %d%sMbps - %d%sMbps\n",
384 range->minmcs, range->maxmcs,
385 minrate/2, ((minrate & 0x1) != 0 ? ".5" : ""),
386 maxrate/2, ((maxrate & 0x1) != 0 ? ".5" : ""));
388 ic_printf(ic, "MCS %d: %d%sMbps\n", range->minmcs,
389 minrate/2, ((minrate & 0x1) != 0 ? ".5" : ""));
395 ht_announce(struct ieee80211com *ic, enum ieee80211_phymode mode)
397 const char *modestr = ieee80211_phymode_name[mode];
399 ic_printf(ic, "%s MCS 20MHz\n", modestr);
400 ht_rateprint(ic, mode, 0);
401 if (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20) {
402 ic_printf(ic, "%s MCS 20MHz SGI\n", modestr);
403 ht_rateprint(ic, mode, 1);
405 if (ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) {
406 ic_printf(ic, "%s MCS 40MHz:\n", modestr);
407 ht_rateprint(ic, mode, 2);
409 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) &&
410 (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40)) {
411 ic_printf(ic, "%s MCS 40MHz SGI:\n", modestr);
412 ht_rateprint(ic, mode, 3);
417 ieee80211_ht_announce(struct ieee80211com *ic)
420 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) ||
421 isset(ic->ic_modecaps, IEEE80211_MODE_11NG))
422 ic_printf(ic, "%dT%dR\n", ic->ic_txstream, ic->ic_rxstream);
423 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA))
424 ht_announce(ic, IEEE80211_MODE_11NA);
425 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NG))
426 ht_announce(ic, IEEE80211_MODE_11NG);
430 ieee80211_init_suphtrates(struct ieee80211com *ic)
432 #define ADDRATE(x) do { \
433 htrateset->rs_rates[htrateset->rs_nrates] = x; \
434 htrateset->rs_nrates++; \
436 struct ieee80211_htrateset *htrateset = &ic->ic_sup_htrates;
439 memset(htrateset, 0, sizeof(struct ieee80211_htrateset));
440 for (i = 0; i < ic->ic_txstream * 8; i++)
442 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) &&
443 (ic->ic_htcaps & IEEE80211_HTC_TXMCS32))
445 if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL) {
446 if (ic->ic_txstream >= 2) {
447 for (i = 33; i <= 38; i++)
450 if (ic->ic_txstream >= 3) {
451 for (i = 39; i <= 52; i++)
454 if (ic->ic_txstream == 4) {
455 for (i = 53; i <= 76; i++)
463 * Receive processing.
467 * Decap the encapsulated A-MSDU frames and dispatch all but
468 * the last for delivery. The last frame is returned for
469 * delivery via the normal path.
472 ieee80211_decap_amsdu(struct ieee80211_node *ni, struct mbuf *m)
474 struct ieee80211vap *vap = ni->ni_vap;
478 /* discard 802.3 header inserted by ieee80211_decap */
479 m_adj(m, sizeof(struct ether_header));
481 vap->iv_stats.is_amsdu_decap++;
485 * Decap the first frame, bust it apart from the
486 * remainder and deliver. We leave the last frame
487 * delivery to the caller (for consistency with other
488 * code paths, could also do it here).
490 m = ieee80211_decap1(m, &framelen);
492 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
493 ni->ni_macaddr, "a-msdu", "%s", "decap failed");
494 vap->iv_stats.is_amsdu_tooshort++;
497 if (m->m_pkthdr.len == framelen)
499 n = m_split(m, framelen, M_NOWAIT);
501 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
502 ni->ni_macaddr, "a-msdu",
503 "%s", "unable to split encapsulated frames");
504 vap->iv_stats.is_amsdu_split++;
505 m_freem(m); /* NB: must reclaim */
508 vap->iv_deliver_data(vap, ni, m);
511 * Remove frame contents; each intermediate frame
512 * is required to be aligned to a 4-byte boundary.
515 m_adj(m, roundup2(framelen, 4) - framelen); /* padding */
517 return m; /* last delivered by caller */
521 ampdu_rx_purge_slot(struct ieee80211_rx_ampdu *rap, int i)
525 /* Walk the queue, removing frames as appropriate */
526 while (mbufq_len(&rap->rxa_mq[i]) != 0) {
527 m = mbufq_dequeue(&rap->rxa_mq[i]);
530 rap->rxa_qbytes -= m->m_pkthdr.len;
537 * Add the given frame to the current RX reorder slot.
539 * For future offloaded A-MSDU handling where multiple frames with
540 * the same sequence number show up here, this routine will append
541 * those frames as long as they're appropriately tagged.
544 ampdu_rx_add_slot(struct ieee80211_rx_ampdu *rap, int off, int tid,
546 struct ieee80211_node *ni,
548 const struct ieee80211_rx_stats *rxs)
550 const struct ieee80211_rx_stats *rxs_final = NULL;
551 struct ieee80211vap *vap = ni->ni_vap;
553 #define PROCESS 0 /* caller should process frame */
554 #define CONSUMED 1 /* frame consumed, caller does nothing */
557 * Figure out if this is a duplicate frame for the given slot.
559 * We're assuming that the driver will hand us all the frames
560 * for a given AMSDU decap pass and if we get /a/ frame
561 * for an AMSDU decap then we'll get all of them.
563 * The tricksy bit is that we don't know when the /end/ of
564 * the decap pass is, because we aren't tracking state here
565 * per-slot to know that we've finished receiving the frame list.
567 * The driver sets RX_F_AMSDU and RX_F_AMSDU_MORE to tell us
568 * what's going on; so ideally we'd just check the frame at the
569 * end of the reassembly slot to see if its F_AMSDU w/ no F_AMSDU_MORE -
570 * that means we've received the whole AMSDU decap pass.
574 * Get the rxs of the final mbuf in the slot, if one exists.
576 if (mbufq_len(&rap->rxa_mq[off]) != 0) {
577 rxs_final = ieee80211_get_rx_params_ptr(mbufq_last(&rap->rxa_mq[off]));
580 /* Default to tossing the duplicate frame */
584 * Check to see if the final frame has F_AMSDU and F_AMSDU set, AND
585 * this frame has F_AMSDU set (MORE or otherwise.) That's a sign
586 * that more can come.
589 if ((rxs != NULL) && (rxs_final != NULL) &&
590 ieee80211_check_rxseq_amsdu(rxs) &&
591 ieee80211_check_rxseq_amsdu(rxs_final)) {
592 if (! ieee80211_check_rxseq_amsdu_more(rxs_final)) {
594 * amsdu_more() returning 0 means "it's not the
595 * final frame" so we can append more
603 * If the list is empty OR we have determined we can put more
604 * driver decap'ed AMSDU frames in here, then insert.
606 if ((mbufq_len(&rap->rxa_mq[off]) == 0) || (toss_dup == 0)) {
607 if (mbufq_enqueue(&rap->rxa_mq[off], m) != 0) {
608 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT | IEEE80211_MSG_11N,
611 "seqno %u tid %u BA win <%u:%u> off=%d, qlen=%d, maxqlen=%d",
612 rxseq, tid, rap->rxa_start,
613 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
615 mbufq_len(&rap->rxa_mq[off]),
616 rap->rxa_mq[off].mq_maxlen);
617 /* XXX error count */
622 rap->rxa_qbytes += m->m_pkthdr.len;
623 vap->iv_stats.is_ampdu_rx_reorder++;
625 * Statistics for AMSDU decap.
627 if (rxs != NULL && ieee80211_check_rxseq_amsdu(rxs)) {
628 if (ieee80211_check_rxseq_amsdu_more(rxs)) {
629 /* more=1, AMSDU, end of batch */
630 IEEE80211_NODE_STAT(ni, rx_amsdu_more_end);
632 IEEE80211_NODE_STAT(ni, rx_amsdu_more);
636 IEEE80211_DISCARD_MAC(vap,
637 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N,
638 ni->ni_macaddr, "a-mpdu duplicate",
639 "seqno %u tid %u BA win <%u:%u>",
640 rxseq, tid, rap->rxa_start,
641 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1));
643 IEEE80211_DISCARD_MAC(vap,
644 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N,
645 ni->ni_macaddr, "a-mpdu duplicate",
646 "seqno %d tid %u pktflags 0x%08x\n",
647 rxseq, tid, rxs->c_pktflags);
649 if (rxs_final != NULL) {
650 IEEE80211_DISCARD_MAC(vap,
651 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N,
652 ni->ni_macaddr, "a-mpdu duplicate",
653 "final: pktflags 0x%08x\n",
654 rxs_final->c_pktflags);
656 vap->iv_stats.is_rx_dup++;
657 IEEE80211_NODE_STAT(ni, rx_dup);
666 * Purge all frames in the A-MPDU re-order queue.
669 ampdu_rx_purge(struct ieee80211_rx_ampdu *rap)
673 for (i = 0; i < rap->rxa_wnd; i++) {
674 ampdu_rx_purge_slot(rap, i);
675 if (rap->rxa_qframes == 0)
678 KASSERT(rap->rxa_qbytes == 0 && rap->rxa_qframes == 0,
679 ("lost %u data, %u frames on ampdu rx q",
680 rap->rxa_qbytes, rap->rxa_qframes));
684 ieee80211_ampdu_rx_init_rap(struct ieee80211_node *ni,
685 struct ieee80211_rx_ampdu *rap)
689 /* XXX TODO: ensure the queues are empty */
690 memset(rap, 0, sizeof(*rap));
691 for (i = 0; i < IEEE80211_AGGR_BAWMAX; i++)
692 mbufq_init(&rap->rxa_mq[i], 256);
696 * Start A-MPDU rx/re-order processing for the specified TID.
699 ampdu_rx_start(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap,
700 int baparamset, int batimeout, int baseqctl)
702 struct ieee80211vap *vap = ni->ni_vap;
703 int bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ);
705 if (rap->rxa_flags & IEEE80211_AGGR_RUNNING) {
707 * AMPDU previously setup and not terminated with a DELBA,
708 * flush the reorder q's in case anything remains.
712 ieee80211_ampdu_rx_init_rap(ni, rap);
713 rap->rxa_wnd = (bufsiz == 0) ?
714 IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX);
715 rap->rxa_start = MS(baseqctl, IEEE80211_BASEQ_START);
716 rap->rxa_flags |= IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_XCHGPEND;
718 /* XXX this should be a configuration flag */
719 if ((vap->iv_htcaps & IEEE80211_HTC_RX_AMSDU_AMPDU) &&
720 (MS(baparamset, IEEE80211_BAPS_AMSDU)))
721 rap->rxa_flags |= IEEE80211_AGGR_AMSDU;
723 rap->rxa_flags &= ~IEEE80211_AGGR_AMSDU;
729 * Public function; manually setup the RX ampdu state.
732 ieee80211_ampdu_rx_start_ext(struct ieee80211_node *ni, int tid, int seq, int baw)
734 struct ieee80211_rx_ampdu *rap;
736 /* XXX TODO: sanity check tid, seq, baw */
738 rap = &ni->ni_rx_ampdu[tid];
740 if (rap->rxa_flags & IEEE80211_AGGR_RUNNING) {
742 * AMPDU previously setup and not terminated with a DELBA,
743 * flush the reorder q's in case anything remains.
748 ieee80211_ampdu_rx_init_rap(ni, rap);
750 rap->rxa_wnd = (baw== 0) ?
751 IEEE80211_AGGR_BAWMAX : min(baw, IEEE80211_AGGR_BAWMAX);
753 /* Wait for the first RX frame, use that as BAW */
755 rap->rxa_flags |= IEEE80211_AGGR_WAITRX;
757 rap->rxa_start = seq;
759 rap->rxa_flags |= IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_XCHGPEND;
761 /* XXX TODO: no amsdu flag */
763 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, ni,
764 "%s: tid=%d, start=%d, wnd=%d, flags=0x%08x",
775 * Public function; manually stop the RX AMPDU state.
778 ieee80211_ampdu_rx_stop_ext(struct ieee80211_node *ni, int tid)
780 struct ieee80211_rx_ampdu *rap;
782 /* XXX TODO: sanity check tid, seq, baw */
783 rap = &ni->ni_rx_ampdu[tid];
784 ampdu_rx_stop(ni, rap);
788 * Stop A-MPDU rx processing for the specified TID.
791 ampdu_rx_stop(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap)
795 rap->rxa_flags &= ~(IEEE80211_AGGR_RUNNING
796 | IEEE80211_AGGR_XCHGPEND
797 | IEEE80211_AGGR_WAITRX);
801 * Dispatch a frame from the A-MPDU reorder queue. The
802 * frame is fed back into ieee80211_input marked with an
803 * M_AMPDU_MPDU flag so it doesn't come back to us (it also
804 * permits ieee80211_input to optimize re-processing).
807 ampdu_dispatch(struct ieee80211_node *ni, struct mbuf *m)
809 m->m_flags |= M_AMPDU_MPDU; /* bypass normal processing */
810 /* NB: rssi and noise are ignored w/ M_AMPDU_MPDU set */
811 (void) ieee80211_input(ni, m, 0, 0);
815 ampdu_dispatch_slot(struct ieee80211_rx_ampdu *rap, struct ieee80211_node *ni,
821 while (mbufq_len(&rap->rxa_mq[i]) != 0) {
822 m = mbufq_dequeue(&rap->rxa_mq[i]);
827 rap->rxa_qbytes -= m->m_pkthdr.len;
830 ampdu_dispatch(ni, m);
836 ampdu_rx_moveup(struct ieee80211_rx_ampdu *rap, struct ieee80211_node *ni,
839 struct ieee80211vap *vap = ni->ni_vap;
842 * If frames remain, copy the mbuf pointers down so
843 * they correspond to the offsets in the new window.
845 if (rap->rxa_qframes != 0) {
846 int n = rap->rxa_qframes, j;
847 for (j = i+1; j < rap->rxa_wnd; j++) {
849 * Concat the list contents over, which will
850 * blank the source list for us.
852 if (mbufq_len(&rap->rxa_mq[j]) != 0) {
853 n = n - mbufq_len(&rap->rxa_mq[j]);
854 mbufq_concat(&rap->rxa_mq[j-i], &rap->rxa_mq[j]);
855 KASSERT(n >= 0, ("%s: n < 0 (%d)", __func__, n));
860 KASSERT(n == 0, ("%s: lost %d frames, qframes %d off %d "
861 "BA win <%d:%d> winstart %d",
862 __func__, n, rap->rxa_qframes, i, rap->rxa_start,
863 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
865 vap->iv_stats.is_ampdu_rx_copy += rap->rxa_qframes;
870 * Dispatch as many frames as possible from the re-order queue.
871 * Frames will always be "at the front"; we process all frames
872 * up to the first empty slot in the window. On completion we
873 * cleanup state if there are still pending frames in the current
874 * BA window. We assume the frame at slot 0 is already handled
875 * by the caller; we always start at slot 1.
878 ampdu_rx_dispatch(struct ieee80211_rx_ampdu *rap, struct ieee80211_node *ni)
880 struct ieee80211vap *vap = ni->ni_vap;
883 /* flush run of frames */
885 for (i = 1; i < rap->rxa_wnd; i++) {
886 r = ampdu_dispatch_slot(rap, ni, i);
893 ampdu_rx_moveup(rap, ni, i, -1);
896 * Adjust the start of the BA window to
897 * reflect the frames just dispatched.
899 rap->rxa_start = IEEE80211_SEQ_ADD(rap->rxa_start, i);
900 vap->iv_stats.is_ampdu_rx_oor += r2;
902 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, ni,
903 "%s: moved slot up %d slots to start at %d (%d frames)",
911 * Dispatch all frames in the A-MPDU re-order queue.
914 ampdu_rx_flush(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap)
918 for (i = 0; i < rap->rxa_wnd; i++) {
919 r = ampdu_dispatch_slot(rap, ni, i);
922 ni->ni_vap->iv_stats.is_ampdu_rx_oor += r;
924 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, ni,
925 "%s: moved slot up %d slots to start at %d (%d frames)",
931 if (rap->rxa_qframes == 0)
937 * Dispatch all frames in the A-MPDU re-order queue
938 * preceding the specified sequence number. This logic
939 * handles window moves due to a received MSDU or BAR.
942 ampdu_rx_flush_upto(struct ieee80211_node *ni,
943 struct ieee80211_rx_ampdu *rap, ieee80211_seq winstart)
945 struct ieee80211vap *vap = ni->ni_vap;
950 * Flush any complete MSDU's with a sequence number lower
951 * than winstart. Gaps may exist. Note that we may actually
952 * dispatch frames past winstart if a run continues; this is
953 * an optimization that avoids having to do a separate pass
954 * to dispatch frames after moving the BA window start.
956 seqno = rap->rxa_start;
957 for (i = 0; i < rap->rxa_wnd; i++) {
958 if ((r = mbufq_len(&rap->rxa_mq[i])) != 0) {
959 (void) ampdu_dispatch_slot(rap, ni, i);
961 if (!IEEE80211_SEQ_BA_BEFORE(seqno, winstart))
964 vap->iv_stats.is_ampdu_rx_oor += r;
965 seqno = IEEE80211_SEQ_INC(seqno);
967 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, ni,
968 "%s: moved slot up %d slots to start at %d (%d frames)",
976 * If frames remain, copy the mbuf pointers down so
977 * they correspond to the offsets in the new window.
979 ampdu_rx_moveup(rap, ni, i, winstart);
982 * Move the start of the BA window; we use the
983 * sequence number of the last MSDU that was
984 * passed up the stack+1 or winstart if stopped on
985 * a gap in the reorder buffer.
987 rap->rxa_start = seqno;
991 * Process a received QoS data frame for an HT station. Handle
992 * A-MPDU reordering: if this frame is received out of order
993 * and falls within the BA window hold onto it. Otherwise if
994 * this frame completes a run, flush any pending frames. We
995 * return 1 if the frame is consumed. A 0 is returned if
996 * the frame should be processed normally by the caller.
998 * A-MSDU: handle hardware decap'ed A-MSDU frames that are
999 * pretending to be MPDU's. They're dispatched directly if
1000 * able; or attempted to put into the receive reordering slot.
1003 ieee80211_ampdu_reorder(struct ieee80211_node *ni, struct mbuf *m,
1004 const struct ieee80211_rx_stats *rxs)
1006 #define PROCESS 0 /* caller should process frame */
1007 #define CONSUMED 1 /* frame consumed, caller does nothing */
1008 struct ieee80211vap *vap = ni->ni_vap;
1009 struct ieee80211_qosframe *wh;
1010 struct ieee80211_rx_ampdu *rap;
1011 ieee80211_seq rxseq;
1014 int amsdu = ieee80211_check_rxseq_amsdu(rxs);
1015 int amsdu_end = ieee80211_check_rxseq_amsdu_more(rxs);
1017 KASSERT((m->m_flags & (M_AMPDU | M_AMPDU_MPDU)) == M_AMPDU,
1018 ("!a-mpdu or already re-ordered, flags 0x%x", m->m_flags));
1019 KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT sta"));
1021 /* NB: m_len known to be sufficient */
1022 wh = mtod(m, struct ieee80211_qosframe *);
1023 if (wh->i_fc[0] != IEEE80211_FC0_QOSDATA) {
1025 * Not QoS data, shouldn't get here but just
1026 * return it to the caller for processing.
1032 * 802.11-2012 9.3.2.10 - Duplicate detection and recovery.
1034 * Multicast QoS data frames are checked against a different
1035 * counter, not the per-TID counter.
1037 if (IEEE80211_IS_MULTICAST(wh->i_addr1))
1040 tid = ieee80211_getqos(wh)[0];
1041 tid &= IEEE80211_QOS_TID;
1042 rap = &ni->ni_rx_ampdu[tid];
1043 if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) {
1045 * No ADDBA request yet, don't touch.
1049 rxseq = le16toh(*(uint16_t *)wh->i_seq);
1050 if ((rxseq & IEEE80211_SEQ_FRAG_MASK) != 0) {
1052 * Fragments are not allowed; toss.
1054 IEEE80211_DISCARD_MAC(vap,
1055 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr,
1056 "A-MPDU", "fragment, rxseq 0x%x tid %u%s", rxseq, tid,
1057 wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : "");
1058 vap->iv_stats.is_ampdu_rx_drop++;
1059 IEEE80211_NODE_STAT(ni, rx_drop);
1063 rxseq >>= IEEE80211_SEQ_SEQ_SHIFT;
1067 * Handle waiting for the first frame to define the BAW.
1068 * Some firmware doesn't provide the RX of the starting point
1069 * of the BAW and we have to cope.
1071 if (rap->rxa_flags & IEEE80211_AGGR_WAITRX) {
1072 rap->rxa_flags &= ~IEEE80211_AGGR_WAITRX;
1073 rap->rxa_start = rxseq;
1076 if (rxseq == rap->rxa_start) {
1078 * First frame in window.
1080 if (rap->rxa_qframes != 0) {
1082 * Dispatch as many packets as we can.
1084 KASSERT((mbufq_len(&rap->rxa_mq[0]) == 0), ("unexpected dup"));
1085 ampdu_dispatch(ni, m);
1086 ampdu_rx_dispatch(rap, ni);
1090 * In order; advance window if needed and notify
1091 * caller to dispatch directly.
1095 rap->rxa_start = IEEE80211_SEQ_INC(rxseq);
1096 IEEE80211_NODE_STAT(ni, rx_amsdu_more_end);
1098 IEEE80211_NODE_STAT(ni, rx_amsdu_more);
1101 rap->rxa_start = IEEE80211_SEQ_INC(rxseq);
1107 * Frame is out of order; store if in the BA window.
1109 /* calculate offset in BA window */
1110 off = IEEE80211_SEQ_SUB(rxseq, rap->rxa_start);
1111 if (off < rap->rxa_wnd) {
1113 * Common case (hopefully): in the BA window.
1114 * Sec 9.10.7.6.2 a) (p.137)
1118 * Check for frames sitting too long in the reorder queue.
1119 * This should only ever happen if frames are not delivered
1120 * without the sender otherwise notifying us (e.g. with a
1121 * BAR to move the window). Typically this happens because
1122 * of vendor bugs that cause the sequence number to jump.
1123 * When this happens we get a gap in the reorder queue that
1124 * leaves frame sitting on the queue until they get pushed
1125 * out due to window moves. When the vendor does not send
1126 * BAR this move only happens due to explicit packet sends
1128 * NB: we only track the time of the oldest frame in the
1129 * reorder q; this means that if we flush we might push
1130 * frames that still "new"; if this happens then subsequent
1131 * frames will result in BA window moves which cost something
1132 * but is still better than a big throughput dip.
1134 if (rap->rxa_qframes != 0) {
1135 /* XXX honor batimeout? */
1136 if (ticks - rap->rxa_age > ieee80211_ampdu_age) {
1138 * Too long since we received the first
1139 * frame; flush the reorder buffer.
1141 if (rap->rxa_qframes != 0) {
1142 vap->iv_stats.is_ampdu_rx_age +=
1144 ampdu_rx_flush(ni, rap);
1147 * Advance the window if needed and notify
1148 * the caller to dispatch directly.
1153 IEEE80211_SEQ_INC(rxseq);
1154 IEEE80211_NODE_STAT(ni,
1157 IEEE80211_NODE_STAT(ni,
1162 IEEE80211_SEQ_INC(rxseq);
1168 * First frame, start aging timer.
1170 rap->rxa_age = ticks;
1173 /* save packet - this consumes, no matter what */
1174 ampdu_rx_add_slot(rap, off, tid, rxseq, ni, m, rxs);
1177 if (off < IEEE80211_SEQ_BA_RANGE) {
1179 * Outside the BA window, but within range;
1180 * flush the reorder q and move the window.
1181 * Sec 9.10.7.6.2 b) (p.138)
1183 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni,
1184 "move BA win <%u:%u> (%u frames) rxseq %u tid %u",
1186 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
1187 rap->rxa_qframes, rxseq, tid);
1188 vap->iv_stats.is_ampdu_rx_move++;
1191 * The spec says to flush frames up to but not including:
1192 * WinStart_B = rxseq - rap->rxa_wnd + 1
1193 * Then insert the frame or notify the caller to process
1194 * it immediately. We can safely do this by just starting
1195 * over again because we know the frame will now be within
1198 /* NB: rxa_wnd known to be >0 */
1199 ampdu_rx_flush_upto(ni, rap,
1200 IEEE80211_SEQ_SUB(rxseq, rap->rxa_wnd-1));
1204 * Outside the BA window and out of range; toss.
1205 * Sec 9.10.7.6.2 c) (p.138)
1207 IEEE80211_DISCARD_MAC(vap,
1208 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr,
1209 "MPDU", "BA win <%u:%u> (%u frames) rxseq %u tid %u%s",
1211 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
1212 rap->rxa_qframes, rxseq, tid,
1213 wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : "");
1214 vap->iv_stats.is_ampdu_rx_drop++;
1215 IEEE80211_NODE_STAT(ni, rx_drop);
1224 * Process a BAR ctl frame. Dispatch all frames up to
1225 * the sequence number of the frame. If this frame is
1226 * out of range it's discarded.
1229 ieee80211_recv_bar(struct ieee80211_node *ni, struct mbuf *m0)
1231 struct ieee80211vap *vap = ni->ni_vap;
1232 struct ieee80211_frame_bar *wh;
1233 struct ieee80211_rx_ampdu *rap;
1234 ieee80211_seq rxseq;
1237 if (!ieee80211_recv_bar_ena) {
1239 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_11N,
1240 ni->ni_macaddr, "BAR", "%s", "processing disabled");
1242 vap->iv_stats.is_ampdu_bar_bad++;
1245 wh = mtod(m0, struct ieee80211_frame_bar *);
1246 /* XXX check basic BAR */
1247 tid = MS(le16toh(wh->i_ctl), IEEE80211_BAR_TID);
1248 rap = &ni->ni_rx_ampdu[tid];
1249 if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) {
1251 * No ADDBA request yet, don't touch.
1253 IEEE80211_DISCARD_MAC(vap,
1254 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N,
1255 ni->ni_macaddr, "BAR", "no BA stream, tid %u", tid);
1256 vap->iv_stats.is_ampdu_bar_bad++;
1259 vap->iv_stats.is_ampdu_bar_rx++;
1260 rxseq = le16toh(wh->i_seq) >> IEEE80211_SEQ_SEQ_SHIFT;
1261 if (rxseq == rap->rxa_start)
1263 /* calculate offset in BA window */
1264 off = IEEE80211_SEQ_SUB(rxseq, rap->rxa_start);
1265 if (off < IEEE80211_SEQ_BA_RANGE) {
1267 * Flush the reorder q up to rxseq and move the window.
1268 * Sec 9.10.7.6.3 a) (p.138)
1270 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni,
1271 "BAR moves BA win <%u:%u> (%u frames) rxseq %u tid %u",
1273 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
1274 rap->rxa_qframes, rxseq, tid);
1275 vap->iv_stats.is_ampdu_bar_move++;
1277 ampdu_rx_flush_upto(ni, rap, rxseq);
1278 if (off >= rap->rxa_wnd) {
1280 * BAR specifies a window start to the right of BA
1281 * window; we must move it explicitly since
1282 * ampdu_rx_flush_upto will not.
1284 rap->rxa_start = rxseq;
1288 * Out of range; toss.
1289 * Sec 9.10.7.6.3 b) (p.138)
1291 IEEE80211_DISCARD_MAC(vap,
1292 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr,
1293 "BAR", "BA win <%u:%u> (%u frames) rxseq %u tid %u%s",
1295 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
1296 rap->rxa_qframes, rxseq, tid,
1297 wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : "");
1298 vap->iv_stats.is_ampdu_bar_oow++;
1299 IEEE80211_NODE_STAT(ni, rx_drop);
1304 * Setup HT-specific state in a node. Called only
1305 * when HT use is negotiated so we don't do extra
1306 * work for temporary and/or legacy sta's.
1309 ieee80211_ht_node_init(struct ieee80211_node *ni)
1311 struct ieee80211_tx_ampdu *tap;
1314 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
1320 if (ni->ni_flags & IEEE80211_NODE_HT) {
1322 * Clean AMPDU state on re-associate. This handles the case
1323 * where a station leaves w/o notifying us and then returns
1324 * before node is reaped for inactivity.
1326 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
1328 "%s: calling cleanup (%p)",
1330 ieee80211_ht_node_cleanup(ni);
1332 for (tid = 0; tid < WME_NUM_TID; tid++) {
1333 tap = &ni->ni_tx_ampdu[tid];
1336 ieee80211_txampdu_init_pps(tap);
1337 /* NB: further initialization deferred */
1338 ieee80211_ampdu_rx_init_rap(ni, &ni->ni_rx_ampdu[tid]);
1340 ni->ni_flags |= IEEE80211_NODE_HT | IEEE80211_NODE_AMPDU |
1341 IEEE80211_NODE_AMSDU;
1345 * Cleanup HT-specific state in a node. Called only
1346 * when HT use has been marked.
1349 ieee80211_ht_node_cleanup(struct ieee80211_node *ni)
1351 struct ieee80211com *ic = ni->ni_ic;
1354 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
1359 KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT node"));
1361 /* XXX optimize this */
1362 for (i = 0; i < WME_NUM_TID; i++) {
1363 struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[i];
1364 if (tap->txa_flags & IEEE80211_AGGR_SETUP)
1367 for (i = 0; i < WME_NUM_TID; i++)
1368 ic->ic_ampdu_rx_stop(ni, &ni->ni_rx_ampdu[i]);
1371 ni->ni_flags &= ~IEEE80211_NODE_HT_ALL;
1375 * Age out HT resources for a station.
1378 ieee80211_ht_node_age(struct ieee80211_node *ni)
1380 struct ieee80211vap *vap = ni->ni_vap;
1383 KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT sta"));
1385 for (tid = 0; tid < WME_NUM_TID; tid++) {
1386 struct ieee80211_rx_ampdu *rap;
1388 rap = &ni->ni_rx_ampdu[tid];
1389 if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0)
1391 if (rap->rxa_qframes == 0)
1394 * Check for frames sitting too long in the reorder queue.
1395 * See above for more details on what's happening here.
1397 /* XXX honor batimeout? */
1398 if (ticks - rap->rxa_age > ieee80211_ampdu_age) {
1400 * Too long since we received the first
1401 * frame; flush the reorder buffer.
1403 vap->iv_stats.is_ampdu_rx_age += rap->rxa_qframes;
1404 ampdu_rx_flush(ni, rap);
1409 static struct ieee80211_channel *
1410 findhtchan(struct ieee80211com *ic, struct ieee80211_channel *c, int htflags)
1412 return ieee80211_find_channel(ic, c->ic_freq,
1413 (c->ic_flags &~ IEEE80211_CHAN_HT) | htflags);
1417 * Adjust a channel to be HT/non-HT according to the vap's configuration.
1419 struct ieee80211_channel *
1420 ieee80211_ht_adjust_channel(struct ieee80211com *ic,
1421 struct ieee80211_channel *chan, int flags)
1423 struct ieee80211_channel *c;
1425 if (flags & IEEE80211_FHT_HT) {
1426 /* promote to HT if possible */
1427 if (flags & IEEE80211_FHT_USEHT40) {
1428 if (!IEEE80211_IS_CHAN_HT40(chan)) {
1429 /* NB: arbitrarily pick ht40+ over ht40- */
1430 c = findhtchan(ic, chan, IEEE80211_CHAN_HT40U);
1432 c = findhtchan(ic, chan,
1433 IEEE80211_CHAN_HT40D);
1435 c = findhtchan(ic, chan,
1436 IEEE80211_CHAN_HT20);
1440 } else if (!IEEE80211_IS_CHAN_HT20(chan)) {
1441 c = findhtchan(ic, chan, IEEE80211_CHAN_HT20);
1445 } else if (IEEE80211_IS_CHAN_HT(chan)) {
1446 /* demote to legacy, HT use is disabled */
1447 c = ieee80211_find_channel(ic, chan->ic_freq,
1448 chan->ic_flags &~ IEEE80211_CHAN_HT);
1456 * Setup HT-specific state for a legacy WDS peer.
1459 ieee80211_ht_wds_init(struct ieee80211_node *ni)
1461 struct ieee80211vap *vap = ni->ni_vap;
1462 struct ieee80211_tx_ampdu *tap;
1465 KASSERT(vap->iv_flags_ht & IEEE80211_FHT_HT, ("no HT requested"));
1467 /* XXX check scan cache in case peer has an ap and we have info */
1469 * If setup with a legacy channel; locate an HT channel.
1470 * Otherwise if the inherited channel (from a companion
1471 * AP) is suitable use it so we use the same location
1472 * for the extension channel).
1474 ni->ni_chan = ieee80211_ht_adjust_channel(ni->ni_ic,
1475 ni->ni_chan, ieee80211_htchanflags(ni->ni_chan));
1478 if (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20)
1479 ni->ni_htcap |= IEEE80211_HTCAP_SHORTGI20;
1480 if (IEEE80211_IS_CHAN_HT40(ni->ni_chan)) {
1481 ni->ni_htcap |= IEEE80211_HTCAP_CHWIDTH40;
1483 if (IEEE80211_IS_CHAN_HT40U(ni->ni_chan))
1484 ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_ABOVE;
1485 else if (IEEE80211_IS_CHAN_HT40D(ni->ni_chan))
1486 ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_BELOW;
1487 if (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40)
1488 ni->ni_htcap |= IEEE80211_HTCAP_SHORTGI40;
1491 ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_NONE;
1493 ni->ni_htctlchan = ni->ni_chan->ic_ieee;
1494 if (vap->iv_flags_ht & IEEE80211_FHT_RIFS)
1495 ni->ni_flags |= IEEE80211_NODE_RIFS;
1496 /* XXX does it make sense to enable SMPS? */
1498 ni->ni_htopmode = 0; /* XXX need protection state */
1499 ni->ni_htstbc = 0; /* XXX need info */
1501 for (tid = 0; tid < WME_NUM_TID; tid++) {
1502 tap = &ni->ni_tx_ampdu[tid];
1504 ieee80211_txampdu_init_pps(tap);
1506 /* NB: AMPDU tx/rx governed by IEEE80211_FHT_AMPDU_{TX,RX} */
1507 ni->ni_flags |= IEEE80211_NODE_HT | IEEE80211_NODE_AMPDU |
1508 IEEE80211_NODE_AMSDU;
1512 * Notify hostap vaps of a change in the HTINFO ie.
1515 htinfo_notify(struct ieee80211com *ic)
1517 struct ieee80211vap *vap;
1520 IEEE80211_LOCK_ASSERT(ic);
1522 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1523 if (vap->iv_opmode != IEEE80211_M_HOSTAP)
1525 if (vap->iv_state != IEEE80211_S_RUN ||
1526 !IEEE80211_IS_CHAN_HT(vap->iv_bss->ni_chan))
1530 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N,
1532 "HT bss occupancy change: %d sta, %d ht, "
1533 "%d ht40%s, HT protmode now 0x%x"
1535 , ic->ic_ht_sta_assoc
1536 , ic->ic_ht40_sta_assoc
1537 , (ic->ic_flags_ht & IEEE80211_FHT_NONHT_PR) ?
1538 ", non-HT sta present" : ""
1539 , ic->ic_curhtprotmode);
1542 ieee80211_beacon_notify(vap, IEEE80211_BEACON_HTINFO);
1547 * Calculate HT protection mode from current
1548 * state and handle updates.
1551 htinfo_update(struct ieee80211com *ic)
1555 if (ic->ic_sta_assoc != ic->ic_ht_sta_assoc) {
1556 protmode = IEEE80211_HTINFO_OPMODE_MIXED
1557 | IEEE80211_HTINFO_NONHT_PRESENT;
1558 } else if (ic->ic_flags_ht & IEEE80211_FHT_NONHT_PR) {
1559 protmode = IEEE80211_HTINFO_OPMODE_PROTOPT
1560 | IEEE80211_HTINFO_NONHT_PRESENT;
1561 } else if (ic->ic_bsschan != IEEE80211_CHAN_ANYC &&
1562 IEEE80211_IS_CHAN_HT40(ic->ic_bsschan) &&
1563 ic->ic_sta_assoc != ic->ic_ht40_sta_assoc) {
1564 protmode = IEEE80211_HTINFO_OPMODE_HT20PR;
1566 protmode = IEEE80211_HTINFO_OPMODE_PURE;
1568 if (protmode != ic->ic_curhtprotmode) {
1569 ic->ic_curhtprotmode = protmode;
1575 * Handle an HT station joining a BSS.
1578 ieee80211_ht_node_join(struct ieee80211_node *ni)
1580 struct ieee80211com *ic = ni->ni_ic;
1582 IEEE80211_LOCK_ASSERT(ic);
1584 if (ni->ni_flags & IEEE80211_NODE_HT) {
1585 ic->ic_ht_sta_assoc++;
1586 if (ni->ni_chw == 40)
1587 ic->ic_ht40_sta_assoc++;
1593 * Handle an HT station leaving a BSS.
1596 ieee80211_ht_node_leave(struct ieee80211_node *ni)
1598 struct ieee80211com *ic = ni->ni_ic;
1600 IEEE80211_LOCK_ASSERT(ic);
1602 if (ni->ni_flags & IEEE80211_NODE_HT) {
1603 ic->ic_ht_sta_assoc--;
1604 if (ni->ni_chw == 40)
1605 ic->ic_ht40_sta_assoc--;
1611 * Public version of htinfo_update; used for processing
1612 * beacon frames from overlapping bss.
1614 * Caller can specify either IEEE80211_HTINFO_OPMODE_MIXED
1615 * (on receipt of a beacon that advertises MIXED) or
1616 * IEEE80211_HTINFO_OPMODE_PROTOPT (on receipt of a beacon
1617 * from an overlapping legacy bss). We treat MIXED with
1618 * a higher precedence than PROTOPT (i.e. we will not change
1619 * change PROTOPT -> MIXED; only MIXED -> PROTOPT). This
1620 * corresponds to how we handle things in htinfo_update.
1623 ieee80211_htprot_update(struct ieee80211com *ic, int protmode)
1625 #define OPMODE(x) SM(x, IEEE80211_HTINFO_OPMODE)
1628 /* track non-HT station presence */
1629 KASSERT(protmode & IEEE80211_HTINFO_NONHT_PRESENT,
1630 ("protmode 0x%x", protmode));
1631 ic->ic_flags_ht |= IEEE80211_FHT_NONHT_PR;
1632 ic->ic_lastnonht = ticks;
1634 if (protmode != ic->ic_curhtprotmode &&
1635 (OPMODE(ic->ic_curhtprotmode) != IEEE80211_HTINFO_OPMODE_MIXED ||
1636 OPMODE(protmode) == IEEE80211_HTINFO_OPMODE_PROTOPT)) {
1637 /* push beacon update */
1638 ic->ic_curhtprotmode = protmode;
1641 IEEE80211_UNLOCK(ic);
1646 * Time out presence of an overlapping bss with non-HT
1647 * stations. When operating in hostap mode we listen for
1648 * beacons from other stations and if we identify a non-HT
1649 * station is present we update the opmode field of the
1650 * HTINFO ie. To identify when all non-HT stations are
1651 * gone we time out this condition.
1654 ieee80211_ht_timeout(struct ieee80211com *ic)
1656 IEEE80211_LOCK_ASSERT(ic);
1658 if ((ic->ic_flags_ht & IEEE80211_FHT_NONHT_PR) &&
1659 ieee80211_time_after(ticks, ic->ic_lastnonht + IEEE80211_NONHT_PRESENT_AGE)) {
1661 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni,
1662 "%s", "time out non-HT STA present on channel");
1664 ic->ic_flags_ht &= ~IEEE80211_FHT_NONHT_PR;
1670 * Process an 802.11n HT capabilities ie.
1673 ieee80211_parse_htcap(struct ieee80211_node *ni, const uint8_t *ie)
1675 if (ie[0] == IEEE80211_ELEMID_VENDOR) {
1677 * Station used Vendor OUI ie to associate;
1678 * mark the node so when we respond we'll use
1679 * the Vendor OUI's and not the standard ie's.
1681 ni->ni_flags |= IEEE80211_NODE_HTCOMPAT;
1684 ni->ni_flags &= ~IEEE80211_NODE_HTCOMPAT;
1686 ni->ni_htcap = le16dec(ie +
1687 __offsetof(struct ieee80211_ie_htcap, hc_cap));
1688 ni->ni_htparam = ie[__offsetof(struct ieee80211_ie_htcap, hc_param)];
1692 htinfo_parse(struct ieee80211_node *ni,
1693 const struct ieee80211_ie_htinfo *htinfo)
1697 ni->ni_htctlchan = htinfo->hi_ctrlchannel;
1698 ni->ni_ht2ndchan = SM(htinfo->hi_byte1, IEEE80211_HTINFO_2NDCHAN);
1699 w = le16dec(&htinfo->hi_byte2);
1700 ni->ni_htopmode = SM(w, IEEE80211_HTINFO_OPMODE);
1701 w = le16dec(&htinfo->hi_byte45);
1702 ni->ni_htstbc = SM(w, IEEE80211_HTINFO_BASIC_STBCMCS);
1706 * Parse an 802.11n HT info ie and save useful information
1707 * to the node state. Note this does not effect any state
1708 * changes such as for channel width change.
1711 ieee80211_parse_htinfo(struct ieee80211_node *ni, const uint8_t *ie)
1713 if (ie[0] == IEEE80211_ELEMID_VENDOR)
1715 htinfo_parse(ni, (const struct ieee80211_ie_htinfo *) ie);
1719 * Handle 11n/11ac channel switch.
1721 * Use the received HT/VHT ie's to identify the right channel to use.
1722 * If we cannot locate it in the channel table then fallback to
1725 * Note that we use this information to identify the node's
1726 * channel only; the caller is responsible for insuring any
1727 * required channel change is done (e.g. in sta mode when
1728 * parsing the contents of a beacon frame).
1731 htinfo_update_chw(struct ieee80211_node *ni, int htflags, int vhtflags)
1733 struct ieee80211com *ic = ni->ni_ic;
1734 struct ieee80211_channel *c;
1739 * First step - do HT/VHT only channel lookup based on operating mode
1740 * flags. This involves masking out the VHT flags as well.
1741 * Otherwise we end up doing the full channel walk each time
1742 * we trigger this, which is expensive.
1744 chanflags = (ni->ni_chan->ic_flags &~
1745 (IEEE80211_CHAN_HT | IEEE80211_CHAN_VHT)) | htflags | vhtflags;
1747 if (chanflags == ni->ni_chan->ic_flags)
1751 * If HT /or/ VHT flags have changed then check both.
1752 * We need to start by picking a HT channel anyway.
1756 chanflags = (ni->ni_chan->ic_flags &~
1757 (IEEE80211_CHAN_HT | IEEE80211_CHAN_VHT)) | htflags;
1758 /* XXX not right for ht40- */
1759 c = ieee80211_find_channel(ic, ni->ni_chan->ic_freq, chanflags);
1760 if (c == NULL && (htflags & IEEE80211_CHAN_HT40)) {
1762 * No HT40 channel entry in our table; fall back
1763 * to HT20 operation. This should not happen.
1765 c = findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT20);
1767 IEEE80211_NOTE(ni->ni_vap,
1768 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni,
1769 "no HT40 channel (freq %u), falling back to HT20",
1770 ni->ni_chan->ic_freq);
1775 /* Nothing found - leave it alone; move onto VHT */
1780 * If it's non-HT, then bail out now.
1782 if (! IEEE80211_IS_CHAN_HT(c)) {
1783 IEEE80211_NOTE(ni->ni_vap,
1784 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni,
1785 "not HT; skipping VHT check (%u/0x%x)",
1786 c->ic_freq, c->ic_flags);
1791 * Next step - look at the current VHT flags and determine
1792 * if we need to upgrade. Mask out the VHT and HT flags since
1793 * the vhtflags field will already have the correct HT
1796 if (IEEE80211_CONF_VHT(ic) && ni->ni_vhtcap != 0 && vhtflags != 0) {
1797 chanflags = (c->ic_flags
1798 &~ (IEEE80211_CHAN_HT | IEEE80211_CHAN_VHT))
1800 IEEE80211_NOTE(ni->ni_vap,
1801 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N,
1803 "%s: VHT; chanwidth=0x%02x; vhtflags=0x%08x",
1804 __func__, ni->ni_vht_chanwidth, vhtflags);
1806 IEEE80211_NOTE(ni->ni_vap,
1807 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N,
1809 "%s: VHT; trying lookup for %d/0x%08x",
1810 __func__, c->ic_freq, chanflags);
1811 c = ieee80211_find_channel(ic, c->ic_freq, chanflags);
1814 /* Finally, if it's changed */
1815 if (c != NULL && c != ni->ni_chan) {
1816 IEEE80211_NOTE(ni->ni_vap,
1817 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni,
1818 "switch station to %s%d channel %u/0x%x",
1819 IEEE80211_IS_CHAN_VHT(c) ? "VHT" : "HT",
1820 IEEE80211_IS_CHAN_VHT80(c) ? 80 :
1821 (IEEE80211_IS_CHAN_HT40(c) ? 40 : 20),
1822 c->ic_freq, c->ic_flags);
1826 /* NB: caller responsible for forcing any channel change */
1829 /* update node's (11n) tx channel width */
1830 ni->ni_chw = IEEE80211_IS_CHAN_HT40(ni->ni_chan)? 40 : 20;
1835 * Update 11n MIMO PS state according to received htcap.
1838 htcap_update_mimo_ps(struct ieee80211_node *ni)
1840 uint16_t oflags = ni->ni_flags;
1842 switch (ni->ni_htcap & IEEE80211_HTCAP_SMPS) {
1843 case IEEE80211_HTCAP_SMPS_DYNAMIC:
1844 ni->ni_flags |= IEEE80211_NODE_MIMO_PS;
1845 ni->ni_flags |= IEEE80211_NODE_MIMO_RTS;
1847 case IEEE80211_HTCAP_SMPS_ENA:
1848 ni->ni_flags |= IEEE80211_NODE_MIMO_PS;
1849 ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS;
1851 case IEEE80211_HTCAP_SMPS_OFF:
1852 default: /* disable on rx of reserved value */
1853 ni->ni_flags &= ~IEEE80211_NODE_MIMO_PS;
1854 ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS;
1857 return (oflags ^ ni->ni_flags);
1861 * Update short GI state according to received htcap
1862 * and local settings.
1864 static __inline void
1865 htcap_update_shortgi(struct ieee80211_node *ni)
1867 struct ieee80211vap *vap = ni->ni_vap;
1869 ni->ni_flags &= ~(IEEE80211_NODE_SGI20|IEEE80211_NODE_SGI40);
1870 if ((ni->ni_htcap & IEEE80211_HTCAP_SHORTGI20) &&
1871 (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20))
1872 ni->ni_flags |= IEEE80211_NODE_SGI20;
1873 if ((ni->ni_htcap & IEEE80211_HTCAP_SHORTGI40) &&
1874 (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40))
1875 ni->ni_flags |= IEEE80211_NODE_SGI40;
1879 * Update LDPC state according to received htcap
1880 * and local settings.
1882 static __inline void
1883 htcap_update_ldpc(struct ieee80211_node *ni)
1885 struct ieee80211vap *vap = ni->ni_vap;
1887 if ((ni->ni_htcap & IEEE80211_HTCAP_LDPC) &&
1888 (vap->iv_flags_ht & IEEE80211_FHT_LDPC_TX))
1889 ni->ni_flags |= IEEE80211_NODE_LDPC;
1893 * Parse and update HT-related state extracted from
1894 * the HT cap and info ie's.
1896 * This is called from the STA management path and
1897 * the ieee80211_node_join() path. It will take into
1898 * account the IEs discovered during scanning and
1899 * adjust things accordingly.
1902 ieee80211_ht_updateparams(struct ieee80211_node *ni,
1903 const uint8_t *htcapie, const uint8_t *htinfoie)
1905 struct ieee80211vap *vap = ni->ni_vap;
1906 const struct ieee80211_ie_htinfo *htinfo;
1908 ieee80211_parse_htcap(ni, htcapie);
1909 if (vap->iv_htcaps & IEEE80211_HTC_SMPS)
1910 htcap_update_mimo_ps(ni);
1911 htcap_update_shortgi(ni);
1912 htcap_update_ldpc(ni);
1914 if (htinfoie[0] == IEEE80211_ELEMID_VENDOR)
1916 htinfo = (const struct ieee80211_ie_htinfo *) htinfoie;
1917 htinfo_parse(ni, htinfo);
1920 * Defer the node channel change; we need to now
1921 * update VHT parameters before we do it.
1924 if ((htinfo->hi_byte1 & IEEE80211_HTINFO_RIFSMODE_PERM) &&
1925 (vap->iv_flags_ht & IEEE80211_FHT_RIFS))
1926 ni->ni_flags |= IEEE80211_NODE_RIFS;
1928 ni->ni_flags &= ~IEEE80211_NODE_RIFS;
1932 ieee80211_vht_get_vhtflags(struct ieee80211_node *ni, uint32_t htflags)
1934 struct ieee80211vap *vap = ni->ni_vap;
1935 uint32_t vhtflags = 0;
1938 if (ni->ni_flags & IEEE80211_NODE_VHT && vap->iv_flags_vht & IEEE80211_FVHT_VHT) {
1939 if ((ni->ni_vht_chanwidth == IEEE80211_VHT_CHANWIDTH_160MHZ) &&
1940 /* XXX 2 means "160MHz and 80+80MHz", 1 means "160MHz" */
1941 (MS(vap->iv_vhtcaps,
1942 IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_MASK) >= 1) &&
1943 (vap->iv_flags_vht & IEEE80211_FVHT_USEVHT160)) {
1944 vhtflags = IEEE80211_CHAN_VHT160;
1945 /* Mirror the HT40 flags */
1946 if (htflags == IEEE80211_CHAN_HT40U) {
1947 vhtflags |= IEEE80211_CHAN_HT40U;
1948 } else if (htflags == IEEE80211_CHAN_HT40D) {
1949 vhtflags |= IEEE80211_CHAN_HT40D;
1951 } else if ((ni->ni_vht_chanwidth == IEEE80211_VHT_CHANWIDTH_80P80MHZ) &&
1952 /* XXX 2 means "160MHz and 80+80MHz" */
1953 (MS(vap->iv_vhtcaps,
1954 IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_MASK) == 2) &&
1955 (vap->iv_flags_vht & IEEE80211_FVHT_USEVHT80P80)) {
1956 vhtflags = IEEE80211_CHAN_VHT80_80;
1957 /* Mirror the HT40 flags */
1958 if (htflags == IEEE80211_CHAN_HT40U) {
1959 vhtflags |= IEEE80211_CHAN_HT40U;
1960 } else if (htflags == IEEE80211_CHAN_HT40D) {
1961 vhtflags |= IEEE80211_CHAN_HT40D;
1963 } else if ((ni->ni_vht_chanwidth == IEEE80211_VHT_CHANWIDTH_80MHZ) &&
1964 (vap->iv_flags_vht & IEEE80211_FVHT_USEVHT80)) {
1965 vhtflags = IEEE80211_CHAN_VHT80;
1966 /* Mirror the HT40 flags */
1967 if (htflags == IEEE80211_CHAN_HT40U) {
1968 vhtflags |= IEEE80211_CHAN_HT40U;
1969 } else if (htflags == IEEE80211_CHAN_HT40D) {
1970 vhtflags |= IEEE80211_CHAN_HT40D;
1972 } else if (ni->ni_vht_chanwidth == IEEE80211_VHT_CHANWIDTH_USE_HT) {
1973 /* Mirror the HT40 flags */
1975 * XXX TODO: if ht40 is disabled, but vht40 isn't
1976 * disabled then this logic will get very, very sad.
1977 * It's quite possible the only sane thing to do is
1978 * to not have vht40 as an option, and just obey
1979 * 'ht40' as that flag.
1981 if ((htflags == IEEE80211_CHAN_HT40U) &&
1982 (vap->iv_flags_vht & IEEE80211_FVHT_USEVHT40)) {
1983 vhtflags = IEEE80211_CHAN_VHT40U
1984 | IEEE80211_CHAN_HT40U;
1985 } else if (htflags == IEEE80211_CHAN_HT40D &&
1986 (vap->iv_flags_vht & IEEE80211_FVHT_USEVHT40)) {
1987 vhtflags = IEEE80211_CHAN_VHT40D
1988 | IEEE80211_CHAN_HT40D;
1989 } else if (htflags == IEEE80211_CHAN_HT20) {
1990 vhtflags = IEEE80211_CHAN_VHT20
1991 | IEEE80211_CHAN_HT20;
1994 vhtflags = IEEE80211_CHAN_VHT20;
2001 * Final part of updating the HT parameters.
2003 * This is called from the STA management path and
2004 * the ieee80211_node_join() path. It will take into
2005 * account the IEs discovered during scanning and
2006 * adjust things accordingly.
2008 * This is done after a call to ieee80211_ht_updateparams()
2009 * because it (and the upcoming VHT version of updateparams)
2010 * needs to ensure everything is parsed before htinfo_update_chw()
2011 * is called - which will change the channel config for the
2015 ieee80211_ht_updateparams_final(struct ieee80211_node *ni,
2016 const uint8_t *htcapie, const uint8_t *htinfoie)
2018 struct ieee80211vap *vap = ni->ni_vap;
2019 const struct ieee80211_ie_htinfo *htinfo;
2020 int htflags, vhtflags;
2023 htinfo = (const struct ieee80211_ie_htinfo *) htinfoie;
2025 htflags = (vap->iv_flags_ht & IEEE80211_FHT_HT) ?
2026 IEEE80211_CHAN_HT20 : 0;
2028 /* NB: honor operating mode constraint */
2029 if ((htinfo->hi_byte1 & IEEE80211_HTINFO_TXWIDTH_2040) &&
2030 (vap->iv_flags_ht & IEEE80211_FHT_USEHT40)) {
2031 if (ni->ni_ht2ndchan == IEEE80211_HTINFO_2NDCHAN_ABOVE)
2032 htflags = IEEE80211_CHAN_HT40U;
2033 else if (ni->ni_ht2ndchan == IEEE80211_HTINFO_2NDCHAN_BELOW)
2034 htflags = IEEE80211_CHAN_HT40D;
2038 * VHT flags - do much the same; check whether VHT is available
2039 * and if so, what our ideal channel use would be based on our
2040 * capabilities and the (pre-parsed) VHT info IE.
2042 vhtflags = ieee80211_vht_get_vhtflags(ni, htflags);
2044 if (htinfo_update_chw(ni, htflags, vhtflags))
2051 * Parse and update HT-related state extracted from the HT cap ie
2052 * for a station joining an HT BSS.
2054 * This is called from the hostap path for each station.
2057 ieee80211_ht_updatehtcap(struct ieee80211_node *ni, const uint8_t *htcapie)
2059 struct ieee80211vap *vap = ni->ni_vap;
2061 ieee80211_parse_htcap(ni, htcapie);
2062 if (vap->iv_htcaps & IEEE80211_HTC_SMPS)
2063 htcap_update_mimo_ps(ni);
2064 htcap_update_shortgi(ni);
2065 htcap_update_ldpc(ni);
2069 * Called once HT and VHT capabilities are parsed in hostap mode -
2070 * this will adjust the channel configuration of the given node
2071 * based on the configuration and capabilities.
2074 ieee80211_ht_updatehtcap_final(struct ieee80211_node *ni)
2076 struct ieee80211vap *vap = ni->ni_vap;
2080 /* NB: honor operating mode constraint */
2081 /* XXX 40 MHz intolerant */
2082 htflags = (vap->iv_flags_ht & IEEE80211_FHT_HT) ?
2083 IEEE80211_CHAN_HT20 : 0;
2084 if ((ni->ni_htcap & IEEE80211_HTCAP_CHWIDTH40) &&
2085 (vap->iv_flags_ht & IEEE80211_FHT_USEHT40)) {
2086 if (IEEE80211_IS_CHAN_HT40U(vap->iv_bss->ni_chan))
2087 htflags = IEEE80211_CHAN_HT40U;
2088 else if (IEEE80211_IS_CHAN_HT40D(vap->iv_bss->ni_chan))
2089 htflags = IEEE80211_CHAN_HT40D;
2092 * VHT flags - do much the same; check whether VHT is available
2093 * and if so, what our ideal channel use would be based on our
2094 * capabilities and the (pre-parsed) VHT info IE.
2096 vhtflags = ieee80211_vht_get_vhtflags(ni, htflags);
2098 (void) htinfo_update_chw(ni, htflags, vhtflags);
2102 * Install received HT rate set by parsing the HT cap ie.
2105 ieee80211_setup_htrates(struct ieee80211_node *ni, const uint8_t *ie, int flags)
2107 struct ieee80211com *ic = ni->ni_ic;
2108 struct ieee80211vap *vap = ni->ni_vap;
2109 const struct ieee80211_ie_htcap *htcap;
2110 struct ieee80211_htrateset *rs;
2111 int i, maxequalmcs, maxunequalmcs;
2113 maxequalmcs = ic->ic_txstream * 8 - 1;
2115 if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL) {
2116 if (ic->ic_txstream >= 2)
2118 if (ic->ic_txstream >= 3)
2120 if (ic->ic_txstream >= 4)
2124 rs = &ni->ni_htrates;
2125 memset(rs, 0, sizeof(*rs));
2127 if (ie[0] == IEEE80211_ELEMID_VENDOR)
2129 htcap = (const struct ieee80211_ie_htcap *) ie;
2130 for (i = 0; i < IEEE80211_HTRATE_MAXSIZE; i++) {
2131 if (isclr(htcap->hc_mcsset, i))
2133 if (rs->rs_nrates == IEEE80211_HTRATE_MAXSIZE) {
2135 IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni,
2136 "WARNING, HT rate set too large; only "
2137 "using %u rates", IEEE80211_HTRATE_MAXSIZE);
2138 vap->iv_stats.is_rx_rstoobig++;
2141 if (i <= 31 && i > maxequalmcs)
2144 (ic->ic_htcaps & IEEE80211_HTC_TXMCS32) == 0)
2146 if (i > 32 && i > maxunequalmcs)
2148 rs->rs_rates[rs->rs_nrates++] = i;
2151 return ieee80211_fix_rate(ni, (struct ieee80211_rateset *) rs, flags);
2155 * Mark rates in a node's HT rate set as basic according
2156 * to the information in the supplied HT info ie.
2159 ieee80211_setup_basic_htrates(struct ieee80211_node *ni, const uint8_t *ie)
2161 const struct ieee80211_ie_htinfo *htinfo;
2162 struct ieee80211_htrateset *rs;
2165 if (ie[0] == IEEE80211_ELEMID_VENDOR)
2167 htinfo = (const struct ieee80211_ie_htinfo *) ie;
2168 rs = &ni->ni_htrates;
2169 if (rs->rs_nrates == 0) {
2170 IEEE80211_NOTE(ni->ni_vap,
2171 IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni,
2172 "%s", "WARNING, empty HT rate set");
2175 for (i = 0; i < IEEE80211_HTRATE_MAXSIZE; i++) {
2176 if (isclr(htinfo->hi_basicmcsset, i))
2178 for (j = 0; j < rs->rs_nrates; j++)
2179 if ((rs->rs_rates[j] & IEEE80211_RATE_VAL) == i)
2180 rs->rs_rates[j] |= IEEE80211_RATE_BASIC;
2185 ampdu_tx_setup(struct ieee80211_tx_ampdu *tap)
2187 callout_init(&tap->txa_timer, 1);
2188 tap->txa_flags |= IEEE80211_AGGR_SETUP;
2189 tap->txa_lastsample = ticks;
2193 ampdu_tx_stop(struct ieee80211_tx_ampdu *tap)
2195 struct ieee80211_node *ni = tap->txa_ni;
2196 struct ieee80211com *ic = ni->ni_ic;
2198 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N,
2203 KASSERT(tap->txa_flags & IEEE80211_AGGR_SETUP,
2204 ("txa_flags 0x%x tid %d ac %d", tap->txa_flags, tap->txa_tid,
2205 TID_TO_WME_AC(tap->txa_tid)));
2208 * Stop BA stream if setup so driver has a chance
2209 * to reclaim any resources it might have allocated.
2211 ic->ic_addba_stop(ni, tap);
2213 * Stop any pending BAR transmit.
2215 bar_stop_timer(tap);
2218 * Reset packet estimate.
2220 ieee80211_txampdu_init_pps(tap);
2222 /* NB: clearing NAK means we may re-send ADDBA */
2223 tap->txa_flags &= ~(IEEE80211_AGGR_SETUP | IEEE80211_AGGR_NAK);
2227 * ADDBA response timeout.
2229 * If software aggregation and per-TID queue management was done here,
2230 * that queue would be unpaused after the ADDBA timeout occurs.
2233 addba_timeout(void *arg)
2235 struct ieee80211_tx_ampdu *tap = arg;
2236 struct ieee80211_node *ni = tap->txa_ni;
2237 struct ieee80211com *ic = ni->ni_ic;
2240 tap->txa_flags &= ~IEEE80211_AGGR_XCHGPEND;
2241 tap->txa_attempts++;
2242 ic->ic_addba_response_timeout(ni, tap);
2246 addba_start_timeout(struct ieee80211_tx_ampdu *tap)
2248 /* XXX use CALLOUT_PENDING instead? */
2249 callout_reset(&tap->txa_timer, ieee80211_addba_timeout,
2250 addba_timeout, tap);
2251 tap->txa_flags |= IEEE80211_AGGR_XCHGPEND;
2252 tap->txa_nextrequest = ticks + ieee80211_addba_timeout;
2256 addba_stop_timeout(struct ieee80211_tx_ampdu *tap)
2258 /* XXX use CALLOUT_PENDING instead? */
2259 if (tap->txa_flags & IEEE80211_AGGR_XCHGPEND) {
2260 callout_stop(&tap->txa_timer);
2261 tap->txa_flags &= ~IEEE80211_AGGR_XCHGPEND;
2266 null_addba_response_timeout(struct ieee80211_node *ni,
2267 struct ieee80211_tx_ampdu *tap)
2272 * Default method for requesting A-MPDU tx aggregation.
2273 * We setup the specified state block and start a timer
2274 * to wait for an ADDBA response frame.
2277 ieee80211_addba_request(struct ieee80211_node *ni,
2278 struct ieee80211_tx_ampdu *tap,
2279 int dialogtoken, int baparamset, int batimeout)
2284 tap->txa_token = dialogtoken;
2285 tap->txa_flags |= IEEE80211_AGGR_IMMEDIATE;
2286 bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ);
2287 tap->txa_wnd = (bufsiz == 0) ?
2288 IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX);
2289 addba_start_timeout(tap);
2294 * Called by drivers that wish to request an ADDBA session be
2295 * setup. This brings it up and starts the request timer.
2298 ieee80211_ampdu_tx_request_ext(struct ieee80211_node *ni, int tid)
2300 struct ieee80211_tx_ampdu *tap;
2302 if (tid < 0 || tid > 15)
2304 tap = &ni->ni_tx_ampdu[tid];
2307 if ((tap->txa_flags & IEEE80211_AGGR_SETUP) == 0) {
2308 /* do deferred setup of state */
2309 ampdu_tx_setup(tap);
2311 /* XXX hack for not doing proper locking */
2312 tap->txa_flags &= ~IEEE80211_AGGR_NAK;
2313 addba_start_timeout(tap);
2318 * Called by drivers that have marked a session as active.
2321 ieee80211_ampdu_tx_request_active_ext(struct ieee80211_node *ni, int tid,
2324 struct ieee80211_tx_ampdu *tap;
2326 if (tid < 0 || tid > 15)
2328 tap = &ni->ni_tx_ampdu[tid];
2331 addba_stop_timeout(tap);
2333 tap->txa_flags |= IEEE80211_AGGR_RUNNING;
2334 tap->txa_attempts = 0;
2336 /* mark tid so we don't try again */
2337 tap->txa_flags |= IEEE80211_AGGR_NAK;
2343 * Default method for processing an A-MPDU tx aggregation
2344 * response. We shutdown any pending timer and update the
2345 * state block according to the reply.
2348 ieee80211_addba_response(struct ieee80211_node *ni,
2349 struct ieee80211_tx_ampdu *tap,
2350 int status, int baparamset, int batimeout)
2352 struct ieee80211vap *vap = ni->ni_vap;
2356 addba_stop_timeout(tap);
2357 if (status == IEEE80211_STATUS_SUCCESS) {
2358 bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ);
2359 /* XXX override our request? */
2360 tap->txa_wnd = (bufsiz == 0) ?
2361 IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX);
2362 tid = MS(baparamset, IEEE80211_BAPS_TID);
2363 tap->txa_flags |= IEEE80211_AGGR_RUNNING;
2364 tap->txa_attempts = 0;
2365 /* TODO: this should be a vap flag */
2366 if ((vap->iv_htcaps & IEEE80211_HTC_TX_AMSDU_AMPDU) &&
2367 (ni->ni_flags & IEEE80211_NODE_AMSDU_TX) &&
2368 (MS(baparamset, IEEE80211_BAPS_AMSDU)))
2369 tap->txa_flags |= IEEE80211_AGGR_AMSDU;
2371 tap->txa_flags &= ~IEEE80211_AGGR_AMSDU;
2373 /* mark tid so we don't try again */
2374 tap->txa_flags |= IEEE80211_AGGR_NAK;
2380 * Default method for stopping A-MPDU tx aggregation.
2381 * Any timer is cleared and we drain any pending frames.
2384 ieee80211_addba_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap)
2387 addba_stop_timeout(tap);
2388 if (tap->txa_flags & IEEE80211_AGGR_RUNNING) {
2389 /* XXX clear aggregation queue */
2390 tap->txa_flags &= ~(IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_AMSDU);
2392 tap->txa_attempts = 0;
2396 * Process a received action frame using the default aggregation
2397 * policy. We intercept ADDBA-related frames and use them to
2398 * update our aggregation state. All other frames are passed up
2399 * for processing by ieee80211_recv_action.
2402 ht_recv_action_ba_addba_request(struct ieee80211_node *ni,
2403 const struct ieee80211_frame *wh,
2404 const uint8_t *frm, const uint8_t *efrm)
2406 struct ieee80211com *ic = ni->ni_ic;
2407 struct ieee80211vap *vap = ni->ni_vap;
2408 struct ieee80211_rx_ampdu *rap;
2409 uint8_t dialogtoken;
2410 uint16_t baparamset, batimeout, baseqctl;
2414 dialogtoken = frm[2];
2415 baparamset = le16dec(frm+3);
2416 batimeout = le16dec(frm+5);
2417 baseqctl = le16dec(frm+7);
2419 tid = MS(baparamset, IEEE80211_BAPS_TID);
2421 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2422 "recv ADDBA request: dialogtoken %u baparamset 0x%x "
2423 "(tid %d bufsiz %d) batimeout %d baseqctl %d:%d amsdu %d",
2424 dialogtoken, baparamset,
2425 tid, MS(baparamset, IEEE80211_BAPS_BUFSIZ),
2427 MS(baseqctl, IEEE80211_BASEQ_START),
2428 MS(baseqctl, IEEE80211_BASEQ_FRAG),
2429 MS(baparamset, IEEE80211_BAPS_AMSDU));
2431 rap = &ni->ni_rx_ampdu[tid];
2433 /* Send ADDBA response */
2434 args[0] = dialogtoken;
2436 * NB: We ack only if the sta associated with HT and
2437 * the ap is configured to do AMPDU rx (the latter
2438 * violates the 11n spec and is mostly for testing).
2440 if ((ni->ni_flags & IEEE80211_NODE_AMPDU_RX) &&
2441 (vap->iv_flags_ht & IEEE80211_FHT_AMPDU_RX)) {
2442 /* XXX TODO: handle ampdu_rx_start failure */
2443 ic->ic_ampdu_rx_start(ni, rap,
2444 baparamset, batimeout, baseqctl);
2446 args[1] = IEEE80211_STATUS_SUCCESS;
2448 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
2449 ni, "reject ADDBA request: %s",
2450 ni->ni_flags & IEEE80211_NODE_AMPDU_RX ?
2451 "administratively disabled" :
2452 "not negotiated for station");
2453 vap->iv_stats.is_addba_reject++;
2454 args[1] = IEEE80211_STATUS_UNSPECIFIED;
2456 /* XXX honor rap flags? */
2457 args[2] = IEEE80211_BAPS_POLICY_IMMEDIATE
2458 | SM(tid, IEEE80211_BAPS_TID)
2459 | SM(rap->rxa_wnd, IEEE80211_BAPS_BUFSIZ)
2463 * TODO: we're out of iv_flags_ht fields; once
2464 * this is extended we should make this configurable.
2466 if ((baparamset & IEEE80211_BAPS_AMSDU) &&
2467 (ni->ni_flags & IEEE80211_NODE_AMSDU_RX) &&
2468 (vap->iv_htcaps & IEEE80211_HTC_RX_AMSDU_AMPDU))
2469 args[2] |= IEEE80211_BAPS_AMSDU;
2473 ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA,
2474 IEEE80211_ACTION_BA_ADDBA_RESPONSE, args);
2479 ht_recv_action_ba_addba_response(struct ieee80211_node *ni,
2480 const struct ieee80211_frame *wh,
2481 const uint8_t *frm, const uint8_t *efrm)
2483 struct ieee80211com *ic = ni->ni_ic;
2484 struct ieee80211vap *vap = ni->ni_vap;
2485 struct ieee80211_tx_ampdu *tap;
2486 uint8_t dialogtoken, policy;
2487 uint16_t baparamset, batimeout, code;
2491 dialogtoken = frm[2];
2492 code = le16dec(frm+3);
2493 baparamset = le16dec(frm+5);
2494 tid = MS(baparamset, IEEE80211_BAPS_TID);
2495 bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ);
2496 policy = MS(baparamset, IEEE80211_BAPS_POLICY);
2497 amsdu = !! MS(baparamset, IEEE80211_BAPS_AMSDU);
2498 batimeout = le16dec(frm+7);
2500 tap = &ni->ni_tx_ampdu[tid];
2501 if ((tap->txa_flags & IEEE80211_AGGR_XCHGPEND) == 0) {
2502 IEEE80211_DISCARD_MAC(vap,
2503 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
2504 ni->ni_macaddr, "ADDBA response",
2505 "no pending ADDBA, tid %d dialogtoken %u "
2506 "code %d", tid, dialogtoken, code);
2507 vap->iv_stats.is_addba_norequest++;
2510 if (dialogtoken != tap->txa_token) {
2511 IEEE80211_DISCARD_MAC(vap,
2512 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
2513 ni->ni_macaddr, "ADDBA response",
2514 "dialogtoken mismatch: waiting for %d, "
2515 "received %d, tid %d code %d",
2516 tap->txa_token, dialogtoken, tid, code);
2517 vap->iv_stats.is_addba_badtoken++;
2520 /* NB: assumes IEEE80211_AGGR_IMMEDIATE is 1 */
2521 if (policy != (tap->txa_flags & IEEE80211_AGGR_IMMEDIATE)) {
2522 IEEE80211_DISCARD_MAC(vap,
2523 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
2524 ni->ni_macaddr, "ADDBA response",
2525 "policy mismatch: expecting %s, "
2526 "received %s, tid %d code %d",
2527 tap->txa_flags & IEEE80211_AGGR_IMMEDIATE,
2529 vap->iv_stats.is_addba_badpolicy++;
2533 /* XXX we take MIN in ieee80211_addba_response */
2534 if (bufsiz > IEEE80211_AGGR_BAWMAX) {
2535 IEEE80211_DISCARD_MAC(vap,
2536 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
2537 ni->ni_macaddr, "ADDBA response",
2538 "BA window too large: max %d, "
2539 "received %d, tid %d code %d",
2540 bufsiz, IEEE80211_AGGR_BAWMAX, tid, code);
2541 vap->iv_stats.is_addba_badbawinsize++;
2546 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2547 "recv ADDBA response: dialogtoken %u code %d "
2548 "baparamset 0x%x (tid %d bufsiz %d amsdu %d) batimeout %d",
2549 dialogtoken, code, baparamset, tid,
2553 ic->ic_addba_response(ni, tap, code, baparamset, batimeout);
2558 ht_recv_action_ba_delba(struct ieee80211_node *ni,
2559 const struct ieee80211_frame *wh,
2560 const uint8_t *frm, const uint8_t *efrm)
2562 struct ieee80211com *ic = ni->ni_ic;
2563 struct ieee80211_rx_ampdu *rap;
2564 struct ieee80211_tx_ampdu *tap;
2565 uint16_t baparamset, code;
2568 baparamset = le16dec(frm+2);
2569 code = le16dec(frm+4);
2571 tid = MS(baparamset, IEEE80211_DELBAPS_TID);
2573 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2574 "recv DELBA: baparamset 0x%x (tid %d initiator %d) "
2575 "code %d", baparamset, tid,
2576 MS(baparamset, IEEE80211_DELBAPS_INIT), code);
2578 if ((baparamset & IEEE80211_DELBAPS_INIT) == 0) {
2579 tap = &ni->ni_tx_ampdu[tid];
2580 ic->ic_addba_stop(ni, tap);
2582 rap = &ni->ni_rx_ampdu[tid];
2583 ic->ic_ampdu_rx_stop(ni, rap);
2589 ht_recv_action_ht_txchwidth(struct ieee80211_node *ni,
2590 const struct ieee80211_frame *wh,
2591 const uint8_t *frm, const uint8_t *efrm)
2595 chw = (frm[2] == IEEE80211_A_HT_TXCHWIDTH_2040) ? 40 : 20;
2597 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2598 "%s: HT txchwidth, width %d%s",
2599 __func__, chw, ni->ni_chw != chw ? "*" : "");
2600 if (chw != ni->ni_chw) {
2601 /* XXX does this need to change the ht40 station count? */
2603 /* XXX notify on change */
2609 ht_recv_action_ht_mimopwrsave(struct ieee80211_node *ni,
2610 const struct ieee80211_frame *wh,
2611 const uint8_t *frm, const uint8_t *efrm)
2613 const struct ieee80211_action_ht_mimopowersave *mps =
2614 (const struct ieee80211_action_ht_mimopowersave *) frm;
2616 /* XXX check iv_htcaps */
2617 if (mps->am_control & IEEE80211_A_HT_MIMOPWRSAVE_ENA)
2618 ni->ni_flags |= IEEE80211_NODE_MIMO_PS;
2620 ni->ni_flags &= ~IEEE80211_NODE_MIMO_PS;
2621 if (mps->am_control & IEEE80211_A_HT_MIMOPWRSAVE_MODE)
2622 ni->ni_flags |= IEEE80211_NODE_MIMO_RTS;
2624 ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS;
2625 /* XXX notify on change */
2626 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2627 "%s: HT MIMO PS (%s%s)", __func__,
2628 (ni->ni_flags & IEEE80211_NODE_MIMO_PS) ? "on" : "off",
2629 (ni->ni_flags & IEEE80211_NODE_MIMO_RTS) ? "+rts" : ""
2635 * Transmit processing.
2639 * Check if A-MPDU should be requested/enabled for a stream.
2640 * We require a traffic rate above a per-AC threshold and we
2641 * also handle backoff from previous failed attempts.
2643 * Drivers may override this method to bring in information
2644 * such as link state conditions in making the decision.
2647 ieee80211_ampdu_enable(struct ieee80211_node *ni,
2648 struct ieee80211_tx_ampdu *tap)
2650 struct ieee80211vap *vap = ni->ni_vap;
2652 if (tap->txa_avgpps <
2653 vap->iv_ampdu_mintraffic[TID_TO_WME_AC(tap->txa_tid)])
2655 /* XXX check rssi? */
2656 if (tap->txa_attempts >= ieee80211_addba_maxtries &&
2657 ieee80211_time_after(ticks, tap->txa_nextrequest)) {
2659 * Don't retry too often; txa_nextrequest is set
2660 * to the minimum interval we'll retry after
2661 * ieee80211_addba_maxtries failed attempts are made.
2665 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni,
2666 "enable AMPDU on tid %d (%s), avgpps %d pkts %d attempt %d",
2667 tap->txa_tid, ieee80211_wme_acnames[TID_TO_WME_AC(tap->txa_tid)],
2668 tap->txa_avgpps, tap->txa_pkts, tap->txa_attempts);
2673 * Request A-MPDU tx aggregation. Setup local state and
2674 * issue an ADDBA request. BA use will only happen after
2675 * the other end replies with ADDBA response.
2678 ieee80211_ampdu_request(struct ieee80211_node *ni,
2679 struct ieee80211_tx_ampdu *tap)
2681 struct ieee80211com *ic = ni->ni_ic;
2683 int tid, dialogtoken;
2684 static int tokens = 0; /* XXX */
2687 if ((tap->txa_flags & IEEE80211_AGGR_SETUP) == 0) {
2688 /* do deferred setup of state */
2689 ampdu_tx_setup(tap);
2691 /* XXX hack for not doing proper locking */
2692 tap->txa_flags &= ~IEEE80211_AGGR_NAK;
2694 dialogtoken = (tokens+1) % 63; /* XXX */
2698 * XXX TODO: This is racy with any other parallel TX going on. :(
2700 tap->txa_start = ni->ni_txseqs[tid];
2702 args[0] = dialogtoken;
2703 args[1] = 0; /* NB: status code not used */
2704 args[2] = IEEE80211_BAPS_POLICY_IMMEDIATE
2705 | SM(tid, IEEE80211_BAPS_TID)
2706 | SM(IEEE80211_AGGR_BAWMAX, IEEE80211_BAPS_BUFSIZ)
2709 /* XXX TODO: this should be a flag, not iv_htcaps */
2710 if ((ni->ni_flags & IEEE80211_NODE_AMSDU_TX) &&
2711 (ni->ni_vap->iv_htcaps & IEEE80211_HTC_TX_AMSDU_AMPDU))
2712 args[2] |= IEEE80211_BAPS_AMSDU;
2714 args[3] = 0; /* batimeout */
2715 /* NB: do first so there's no race against reply */
2716 if (!ic->ic_addba_request(ni, tap, dialogtoken, args[2], args[3])) {
2717 /* unable to setup state, don't make request */
2718 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
2719 ni, "%s: could not setup BA stream for TID %d AC %d",
2720 __func__, tap->txa_tid, TID_TO_WME_AC(tap->txa_tid));
2721 /* defer next try so we don't slam the driver with requests */
2722 tap->txa_attempts = ieee80211_addba_maxtries;
2723 /* NB: check in case driver wants to override */
2724 if (tap->txa_nextrequest <= ticks)
2725 tap->txa_nextrequest = ticks + ieee80211_addba_backoff;
2728 tokens = dialogtoken; /* allocate token */
2729 /* NB: after calling ic_addba_request so driver can set txa_start */
2730 args[4] = SM(tap->txa_start, IEEE80211_BASEQ_START)
2731 | SM(0, IEEE80211_BASEQ_FRAG)
2733 return ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA,
2734 IEEE80211_ACTION_BA_ADDBA_REQUEST, args);
2738 * Terminate an AMPDU tx stream. State is reclaimed
2739 * and the peer notified with a DelBA Action frame.
2742 ieee80211_ampdu_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap,
2745 struct ieee80211com *ic = ni->ni_ic;
2746 struct ieee80211vap *vap = ni->ni_vap;
2750 tap->txa_flags &= ~IEEE80211_AGGR_BARPEND;
2751 if (IEEE80211_AMPDU_RUNNING(tap)) {
2752 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
2753 ni, "%s: stop BA stream for TID %d (reason: %d (%s))",
2754 __func__, tap->txa_tid, reason,
2755 ieee80211_reason_to_string(reason));
2756 vap->iv_stats.is_ampdu_stop++;
2758 ic->ic_addba_stop(ni, tap);
2759 args[0] = tap->txa_tid;
2760 args[1] = IEEE80211_DELBAPS_INIT;
2761 args[2] = reason; /* XXX reason code */
2762 ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA,
2763 IEEE80211_ACTION_BA_DELBA, args);
2765 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
2766 ni, "%s: BA stream for TID %d not running "
2767 "(reason: %d (%s))", __func__, tap->txa_tid, reason,
2768 ieee80211_reason_to_string(reason));
2769 vap->iv_stats.is_ampdu_stop_failed++;
2774 static void bar_start_timer(struct ieee80211_tx_ampdu *tap);
2777 bar_timeout(void *arg)
2779 struct ieee80211_tx_ampdu *tap = arg;
2780 struct ieee80211_node *ni = tap->txa_ni;
2782 KASSERT((tap->txa_flags & IEEE80211_AGGR_XCHGPEND) == 0,
2783 ("bar/addba collision, flags 0x%x", tap->txa_flags));
2785 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
2786 ni, "%s: tid %u flags 0x%x attempts %d", __func__,
2787 tap->txa_tid, tap->txa_flags, tap->txa_attempts);
2789 /* guard against race with bar_tx_complete */
2790 if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) == 0)
2793 if (tap->txa_attempts >= ieee80211_bar_maxtries) {
2794 struct ieee80211com *ic = ni->ni_ic;
2796 ni->ni_vap->iv_stats.is_ampdu_bar_tx_fail++;
2798 * If (at least) the last BAR TX timeout was due to
2799 * an ieee80211_send_bar() failures, then we need
2800 * to make sure we notify the driver that a BAR
2801 * TX did occur and fail. This gives the driver
2802 * a chance to undo any queue pause that may
2805 ic->ic_bar_response(ni, tap, 1);
2806 ieee80211_ampdu_stop(ni, tap, IEEE80211_REASON_TIMEOUT);
2808 ni->ni_vap->iv_stats.is_ampdu_bar_tx_retry++;
2809 if (ieee80211_send_bar(ni, tap, tap->txa_seqpending) != 0) {
2810 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
2811 ni, "%s: failed to TX, starting timer\n",
2814 * If ieee80211_send_bar() fails here, the
2815 * timer may have stopped and/or the pending
2816 * flag may be clear. Because of this,
2817 * fake the BARPEND and reset the timer.
2818 * A retransmission attempt will then occur
2819 * during the next timeout.
2822 tap->txa_flags |= IEEE80211_AGGR_BARPEND;
2823 bar_start_timer(tap);
2829 bar_start_timer(struct ieee80211_tx_ampdu *tap)
2831 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N,
2835 callout_reset(&tap->txa_timer, ieee80211_bar_timeout, bar_timeout, tap);
2839 bar_stop_timer(struct ieee80211_tx_ampdu *tap)
2841 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N,
2845 callout_stop(&tap->txa_timer);
2849 bar_tx_complete(struct ieee80211_node *ni, void *arg, int status)
2851 struct ieee80211_tx_ampdu *tap = arg;
2853 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
2854 ni, "%s: tid %u flags 0x%x pending %d status %d",
2855 __func__, tap->txa_tid, tap->txa_flags,
2856 callout_pending(&tap->txa_timer), status);
2858 ni->ni_vap->iv_stats.is_ampdu_bar_tx++;
2860 if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) &&
2861 callout_pending(&tap->txa_timer)) {
2862 struct ieee80211com *ic = ni->ni_ic;
2864 if (status == 0) /* ACK'd */
2865 bar_stop_timer(tap);
2866 ic->ic_bar_response(ni, tap, status);
2867 /* NB: just let timer expire so we pace requests */
2872 ieee80211_bar_response(struct ieee80211_node *ni,
2873 struct ieee80211_tx_ampdu *tap, int status)
2876 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N,
2880 if (status == 0) { /* got ACK */
2881 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
2882 ni, "BAR moves BA win <%u:%u> (%u frames) txseq %u tid %u",
2884 IEEE80211_SEQ_ADD(tap->txa_start, tap->txa_wnd-1),
2885 tap->txa_qframes, tap->txa_seqpending,
2888 /* NB: timer already stopped in bar_tx_complete */
2889 tap->txa_start = tap->txa_seqpending;
2890 tap->txa_flags &= ~IEEE80211_AGGR_BARPEND;
2895 * Transmit a BAR frame to the specified node. The
2896 * BAR contents are drawn from the supplied aggregation
2897 * state associated with the node.
2899 * NB: we only handle immediate ACK w/ compressed bitmap.
2902 ieee80211_send_bar(struct ieee80211_node *ni,
2903 struct ieee80211_tx_ampdu *tap, ieee80211_seq seq)
2905 #define senderr(_x, _v) do { vap->iv_stats._v++; ret = _x; goto bad; } while (0)
2906 struct ieee80211vap *vap = ni->ni_vap;
2907 struct ieee80211com *ic = ni->ni_ic;
2908 struct ieee80211_frame_bar *bar;
2910 uint16_t barctl, barseqctl;
2915 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N,
2920 if ((tap->txa_flags & IEEE80211_AGGR_RUNNING) == 0) {
2921 /* no ADDBA response, should not happen */
2926 bar_stop_timer(tap);
2928 ieee80211_ref_node(ni);
2930 m = ieee80211_getmgtframe(&frm, ic->ic_headroom, sizeof(*bar));
2932 senderr(ENOMEM, is_tx_nobuf);
2934 if (!ieee80211_add_callback(m, bar_tx_complete, tap)) {
2936 senderr(ENOMEM, is_tx_nobuf); /* XXX */
2940 bar = mtod(m, struct ieee80211_frame_bar *);
2941 bar->i_fc[0] = IEEE80211_FC0_VERSION_0 |
2942 IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_BAR;
2944 IEEE80211_ADDR_COPY(bar->i_ra, ni->ni_macaddr);
2945 IEEE80211_ADDR_COPY(bar->i_ta, vap->iv_myaddr);
2948 barctl = (tap->txa_flags & IEEE80211_AGGR_IMMEDIATE ?
2949 0 : IEEE80211_BAR_NOACK)
2950 | IEEE80211_BAR_COMP
2951 | SM(tid, IEEE80211_BAR_TID)
2953 barseqctl = SM(seq, IEEE80211_BAR_SEQ_START);
2954 /* NB: known to have proper alignment */
2955 bar->i_ctl = htole16(barctl);
2956 bar->i_seq = htole16(barseqctl);
2957 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_bar);
2959 M_WME_SETAC(m, WME_AC_VO);
2961 IEEE80211_NODE_STAT(ni, tx_mgmt); /* XXX tx_ctl? */
2964 /* init/bump attempts counter */
2965 if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) == 0)
2966 tap->txa_attempts = 1;
2968 tap->txa_attempts++;
2969 tap->txa_seqpending = seq;
2970 tap->txa_flags |= IEEE80211_AGGR_BARPEND;
2972 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_11N,
2973 ni, "send BAR: tid %u ctl 0x%x start %u (attempt %d)",
2974 tid, barctl, seq, tap->txa_attempts);
2977 * ic_raw_xmit will free the node reference
2978 * regardless of queue/TX success or failure.
2980 IEEE80211_TX_LOCK(ic);
2981 ret = ieee80211_raw_output(vap, ni, m, NULL);
2982 IEEE80211_TX_UNLOCK(ic);
2984 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_11N,
2985 ni, "send BAR: failed: (ret = %d)\n",
2987 /* xmit failed, clear state flag */
2988 tap->txa_flags &= ~IEEE80211_AGGR_BARPEND;
2989 vap->iv_stats.is_ampdu_bar_tx_fail++;
2992 /* XXX hack against tx complete happening before timer is started */
2993 if (tap->txa_flags & IEEE80211_AGGR_BARPEND)
2994 bar_start_timer(tap);
2997 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N,
3001 vap->iv_stats.is_ampdu_bar_tx_fail++;
3002 ieee80211_free_node(ni);
3008 ht_action_output(struct ieee80211_node *ni, struct mbuf *m)
3010 struct ieee80211_bpf_params params;
3012 memset(¶ms, 0, sizeof(params));
3013 params.ibp_pri = WME_AC_VO;
3014 params.ibp_rate0 = ni->ni_txparms->mgmtrate;
3015 /* NB: we know all frames are unicast */
3016 params.ibp_try0 = ni->ni_txparms->maxretry;
3017 params.ibp_power = ni->ni_txpower;
3018 return ieee80211_mgmt_output(ni, m, IEEE80211_FC0_SUBTYPE_ACTION,
3022 #define ADDSHORT(frm, v) do { \
3023 frm[0] = (v) & 0xff; \
3024 frm[1] = (v) >> 8; \
3029 * Send an action management frame. The arguments are stuff
3030 * into a frame without inspection; the caller is assumed to
3031 * prepare them carefully (e.g. based on the aggregation state).
3034 ht_send_action_ba_addba(struct ieee80211_node *ni,
3035 int category, int action, void *arg0)
3037 struct ieee80211vap *vap = ni->ni_vap;
3038 struct ieee80211com *ic = ni->ni_ic;
3039 uint16_t *args = arg0;
3043 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
3044 "send ADDBA %s: dialogtoken %d status %d "
3045 "baparamset 0x%x (tid %d amsdu %d) batimeout 0x%x baseqctl 0x%x",
3046 (action == IEEE80211_ACTION_BA_ADDBA_REQUEST) ?
3047 "request" : "response",
3048 args[0], args[1], args[2], MS(args[2], IEEE80211_BAPS_TID),
3049 MS(args[2], IEEE80211_BAPS_AMSDU), args[3], args[4]);
3051 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
3052 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
3053 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
3054 ieee80211_ref_node(ni);
3056 m = ieee80211_getmgtframe(&frm,
3057 ic->ic_headroom + sizeof(struct ieee80211_frame),
3058 sizeof(uint16_t) /* action+category */
3059 /* XXX may action payload */
3060 + sizeof(struct ieee80211_action_ba_addbaresponse)
3065 *frm++ = args[0]; /* dialog token */
3066 if (action == IEEE80211_ACTION_BA_ADDBA_RESPONSE)
3067 ADDSHORT(frm, args[1]); /* status code */
3068 ADDSHORT(frm, args[2]); /* baparamset */
3069 ADDSHORT(frm, args[3]); /* batimeout */
3070 if (action == IEEE80211_ACTION_BA_ADDBA_REQUEST)
3071 ADDSHORT(frm, args[4]); /* baseqctl */
3072 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
3073 return ht_action_output(ni, m);
3075 vap->iv_stats.is_tx_nobuf++;
3076 ieee80211_free_node(ni);
3082 ht_send_action_ba_delba(struct ieee80211_node *ni,
3083 int category, int action, void *arg0)
3085 struct ieee80211vap *vap = ni->ni_vap;
3086 struct ieee80211com *ic = ni->ni_ic;
3087 uint16_t *args = arg0;
3089 uint16_t baparamset;
3092 baparamset = SM(args[0], IEEE80211_DELBAPS_TID)
3095 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
3096 "send DELBA action: tid %d, initiator %d reason %d (%s)",
3097 args[0], args[1], args[2], ieee80211_reason_to_string(args[2]));
3099 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
3100 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
3101 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
3102 ieee80211_ref_node(ni);
3104 m = ieee80211_getmgtframe(&frm,
3105 ic->ic_headroom + sizeof(struct ieee80211_frame),
3106 sizeof(uint16_t) /* action+category */
3107 /* XXX may action payload */
3108 + sizeof(struct ieee80211_action_ba_addbaresponse)
3113 ADDSHORT(frm, baparamset);
3114 ADDSHORT(frm, args[2]); /* reason code */
3115 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
3116 return ht_action_output(ni, m);
3118 vap->iv_stats.is_tx_nobuf++;
3119 ieee80211_free_node(ni);
3125 ht_send_action_ht_txchwidth(struct ieee80211_node *ni,
3126 int category, int action, void *arg0)
3128 struct ieee80211vap *vap = ni->ni_vap;
3129 struct ieee80211com *ic = ni->ni_ic;
3133 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
3134 "send HT txchwidth: width %d",
3135 IEEE80211_IS_CHAN_HT40(ni->ni_chan) ? 40 : 20);
3137 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
3138 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
3139 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
3140 ieee80211_ref_node(ni);
3142 m = ieee80211_getmgtframe(&frm,
3143 ic->ic_headroom + sizeof(struct ieee80211_frame),
3144 sizeof(uint16_t) /* action+category */
3145 /* XXX may action payload */
3146 + sizeof(struct ieee80211_action_ba_addbaresponse)
3151 *frm++ = IEEE80211_IS_CHAN_HT40(ni->ni_chan) ?
3152 IEEE80211_A_HT_TXCHWIDTH_2040 :
3153 IEEE80211_A_HT_TXCHWIDTH_20;
3154 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
3155 return ht_action_output(ni, m);
3157 vap->iv_stats.is_tx_nobuf++;
3158 ieee80211_free_node(ni);
3165 * Construct the MCS bit mask for inclusion in an HT capabilities
3166 * information element.
3169 ieee80211_set_mcsset(struct ieee80211com *ic, uint8_t *frm)
3174 KASSERT((ic->ic_rxstream > 0 && ic->ic_rxstream <= 4),
3175 ("ic_rxstream %d out of range", ic->ic_rxstream));
3176 KASSERT((ic->ic_txstream > 0 && ic->ic_txstream <= 4),
3177 ("ic_txstream %d out of range", ic->ic_txstream));
3179 for (i = 0; i < ic->ic_rxstream * 8; i++)
3181 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) &&
3182 (ic->ic_htcaps & IEEE80211_HTC_RXMCS32))
3184 if (ic->ic_htcaps & IEEE80211_HTC_RXUNEQUAL) {
3185 if (ic->ic_rxstream >= 2) {
3186 for (i = 33; i <= 38; i++)
3189 if (ic->ic_rxstream >= 3) {
3190 for (i = 39; i <= 52; i++)
3193 if (ic->ic_txstream >= 4) {
3194 for (i = 53; i <= 76; i++)
3199 if (ic->ic_rxstream != ic->ic_txstream) {
3200 txparams = 0x1; /* TX MCS set defined */
3201 txparams |= 0x2; /* TX RX MCS not equal */
3202 txparams |= (ic->ic_txstream - 1) << 2; /* num TX streams */
3203 if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL)
3204 txparams |= 0x16; /* TX unequal modulation sup */
3211 * Add body of an HTCAP information element.
3214 ieee80211_add_htcap_body(uint8_t *frm, struct ieee80211_node *ni)
3216 #define ADDSHORT(frm, v) do { \
3217 frm[0] = (v) & 0xff; \
3218 frm[1] = (v) >> 8; \
3221 struct ieee80211com *ic = ni->ni_ic;
3222 struct ieee80211vap *vap = ni->ni_vap;
3223 uint16_t caps, extcaps;
3226 /* HT capabilities */
3227 caps = vap->iv_htcaps & 0xffff;
3229 * Note channel width depends on whether we are operating as
3230 * a sta or not. When operating as a sta we are generating
3231 * a request based on our desired configuration. Otherwise
3232 * we are operational and the channel attributes identify
3233 * how we've been setup (which might be different if a fixed
3234 * channel is specified).
3236 if (vap->iv_opmode == IEEE80211_M_STA) {
3237 /* override 20/40 use based on config */
3238 if (vap->iv_flags_ht & IEEE80211_FHT_USEHT40)
3239 caps |= IEEE80211_HTCAP_CHWIDTH40;
3241 caps &= ~IEEE80211_HTCAP_CHWIDTH40;
3243 /* Start by using the advertised settings */
3244 rxmax = MS(ni->ni_htparam, IEEE80211_HTCAP_MAXRXAMPDU);
3245 density = MS(ni->ni_htparam, IEEE80211_HTCAP_MPDUDENSITY);
3247 IEEE80211_DPRINTF(vap, IEEE80211_MSG_11N,
3248 "%s: advertised rxmax=%d, density=%d, vap rxmax=%d, density=%d\n",
3252 vap->iv_ampdu_rxmax,
3253 vap->iv_ampdu_density);
3255 /* Cap at VAP rxmax */
3256 if (rxmax > vap->iv_ampdu_rxmax)
3257 rxmax = vap->iv_ampdu_rxmax;
3260 * If the VAP ampdu density value greater, use that.
3262 * (Larger density value == larger minimum gap between A-MPDU
3265 if (vap->iv_ampdu_density > density)
3266 density = vap->iv_ampdu_density;
3269 * NB: Hardware might support HT40 on some but not all
3270 * channels. We can't determine this earlier because only
3271 * after association the channel is upgraded to HT based
3272 * on the negotiated capabilities.
3274 if (ni->ni_chan != IEEE80211_CHAN_ANYC &&
3275 findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT40U) == NULL &&
3276 findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT40D) == NULL)
3277 caps &= ~IEEE80211_HTCAP_CHWIDTH40;
3279 /* override 20/40 use based on current channel */
3280 if (IEEE80211_IS_CHAN_HT40(ni->ni_chan))
3281 caps |= IEEE80211_HTCAP_CHWIDTH40;
3283 caps &= ~IEEE80211_HTCAP_CHWIDTH40;
3285 /* XXX TODO should it start by using advertised settings? */
3286 rxmax = vap->iv_ampdu_rxmax;
3287 density = vap->iv_ampdu_density;
3290 /* adjust short GI based on channel and config */
3291 if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20) == 0)
3292 caps &= ~IEEE80211_HTCAP_SHORTGI20;
3293 if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40) == 0 ||
3294 (caps & IEEE80211_HTCAP_CHWIDTH40) == 0)
3295 caps &= ~IEEE80211_HTCAP_SHORTGI40;
3297 /* adjust STBC based on receive capabilities */
3298 if ((vap->iv_flags_ht & IEEE80211_FHT_STBC_RX) == 0)
3299 caps &= ~IEEE80211_HTCAP_RXSTBC;
3301 /* adjust LDPC based on receive capabilites */
3302 if ((vap->iv_flags_ht & IEEE80211_FHT_LDPC_RX) == 0)
3303 caps &= ~IEEE80211_HTCAP_LDPC;
3305 ADDSHORT(frm, caps);
3308 *frm = SM(rxmax, IEEE80211_HTCAP_MAXRXAMPDU)
3309 | SM(density, IEEE80211_HTCAP_MPDUDENSITY)
3313 /* pre-zero remainder of ie */
3314 memset(frm, 0, sizeof(struct ieee80211_ie_htcap) -
3315 __offsetof(struct ieee80211_ie_htcap, hc_mcsset));
3317 /* supported MCS set */
3319 * XXX: For sta mode the rate set should be restricted based
3320 * on the AP's capabilities, but ni_htrates isn't setup when
3321 * we're called to form an AssocReq frame so for now we're
3322 * restricted to the device capabilities.
3324 ieee80211_set_mcsset(ni->ni_ic, frm);
3326 frm += __offsetof(struct ieee80211_ie_htcap, hc_extcap) -
3327 __offsetof(struct ieee80211_ie_htcap, hc_mcsset);
3329 /* HT extended capabilities */
3330 extcaps = vap->iv_htextcaps & 0xffff;
3332 ADDSHORT(frm, extcaps);
3334 frm += sizeof(struct ieee80211_ie_htcap) -
3335 __offsetof(struct ieee80211_ie_htcap, hc_txbf);
3342 * Add 802.11n HT capabilities information element
3345 ieee80211_add_htcap(uint8_t *frm, struct ieee80211_node *ni)
3347 frm[0] = IEEE80211_ELEMID_HTCAP;
3348 frm[1] = sizeof(struct ieee80211_ie_htcap) - 2;
3349 return ieee80211_add_htcap_body(frm + 2, ni);
3353 * Non-associated probe request - add HT capabilities based on
3354 * the current channel configuration.
3357 ieee80211_add_htcap_body_ch(uint8_t *frm, struct ieee80211vap *vap,
3358 struct ieee80211_channel *c)
3360 #define ADDSHORT(frm, v) do { \
3361 frm[0] = (v) & 0xff; \
3362 frm[1] = (v) >> 8; \
3365 struct ieee80211com *ic = vap->iv_ic;
3366 uint16_t caps, extcaps;
3369 /* HT capabilities */
3370 caps = vap->iv_htcaps & 0xffff;
3373 * We don't use this in STA mode; only in IBSS mode.
3374 * So in IBSS mode we base our HTCAP flags on the
3378 /* override 20/40 use based on current channel */
3379 if (IEEE80211_IS_CHAN_HT40(c))
3380 caps |= IEEE80211_HTCAP_CHWIDTH40;
3382 caps &= ~IEEE80211_HTCAP_CHWIDTH40;
3384 /* Use the currently configured values */
3385 rxmax = vap->iv_ampdu_rxmax;
3386 density = vap->iv_ampdu_density;
3388 /* adjust short GI based on channel and config */
3389 if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20) == 0)
3390 caps &= ~IEEE80211_HTCAP_SHORTGI20;
3391 if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40) == 0 ||
3392 (caps & IEEE80211_HTCAP_CHWIDTH40) == 0)
3393 caps &= ~IEEE80211_HTCAP_SHORTGI40;
3394 ADDSHORT(frm, caps);
3397 *frm = SM(rxmax, IEEE80211_HTCAP_MAXRXAMPDU)
3398 | SM(density, IEEE80211_HTCAP_MPDUDENSITY)
3402 /* pre-zero remainder of ie */
3403 memset(frm, 0, sizeof(struct ieee80211_ie_htcap) -
3404 __offsetof(struct ieee80211_ie_htcap, hc_mcsset));
3406 /* supported MCS set */
3408 * XXX: For sta mode the rate set should be restricted based
3409 * on the AP's capabilities, but ni_htrates isn't setup when
3410 * we're called to form an AssocReq frame so for now we're
3411 * restricted to the device capabilities.
3413 ieee80211_set_mcsset(ic, frm);
3415 frm += __offsetof(struct ieee80211_ie_htcap, hc_extcap) -
3416 __offsetof(struct ieee80211_ie_htcap, hc_mcsset);
3418 /* HT extended capabilities */
3419 extcaps = vap->iv_htextcaps & 0xffff;
3421 ADDSHORT(frm, extcaps);
3423 frm += sizeof(struct ieee80211_ie_htcap) -
3424 __offsetof(struct ieee80211_ie_htcap, hc_txbf);
3431 * Add 802.11n HT capabilities information element
3434 ieee80211_add_htcap_ch(uint8_t *frm, struct ieee80211vap *vap,
3435 struct ieee80211_channel *c)
3437 frm[0] = IEEE80211_ELEMID_HTCAP;
3438 frm[1] = sizeof(struct ieee80211_ie_htcap) - 2;
3439 return ieee80211_add_htcap_body_ch(frm + 2, vap, c);
3443 * Add Broadcom OUI wrapped standard HTCAP ie; this is
3444 * used for compatibility w/ pre-draft implementations.
3447 ieee80211_add_htcap_vendor(uint8_t *frm, struct ieee80211_node *ni)
3449 frm[0] = IEEE80211_ELEMID_VENDOR;
3450 frm[1] = 4 + sizeof(struct ieee80211_ie_htcap) - 2;
3451 frm[2] = (BCM_OUI >> 0) & 0xff;
3452 frm[3] = (BCM_OUI >> 8) & 0xff;
3453 frm[4] = (BCM_OUI >> 16) & 0xff;
3454 frm[5] = BCM_OUI_HTCAP;
3455 return ieee80211_add_htcap_body(frm + 6, ni);
3459 * Construct the MCS bit mask of basic rates
3460 * for inclusion in an HT information element.
3463 ieee80211_set_basic_htrates(uint8_t *frm, const struct ieee80211_htrateset *rs)
3467 for (i = 0; i < rs->rs_nrates; i++) {
3468 int r = rs->rs_rates[i] & IEEE80211_RATE_VAL;
3469 if ((rs->rs_rates[i] & IEEE80211_RATE_BASIC) &&
3470 r < IEEE80211_HTRATE_MAXSIZE) {
3471 /* NB: this assumes a particular implementation */
3478 * Update the HTINFO ie for a beacon frame.
3481 ieee80211_ht_update_beacon(struct ieee80211vap *vap,
3482 struct ieee80211_beacon_offsets *bo)
3484 #define PROTMODE (IEEE80211_HTINFO_OPMODE|IEEE80211_HTINFO_NONHT_PRESENT)
3485 struct ieee80211_node *ni;
3486 const struct ieee80211_channel *bsschan;
3487 struct ieee80211com *ic = vap->iv_ic;
3488 struct ieee80211_ie_htinfo *ht =
3489 (struct ieee80211_ie_htinfo *) bo->bo_htinfo;
3491 ni = ieee80211_ref_node(vap->iv_bss);
3492 bsschan = ni->ni_chan;
3494 /* XXX only update on channel change */
3495 ht->hi_ctrlchannel = ieee80211_chan2ieee(ic, bsschan);
3496 if (vap->iv_flags_ht & IEEE80211_FHT_RIFS)
3497 ht->hi_byte1 = IEEE80211_HTINFO_RIFSMODE_PERM;
3499 ht->hi_byte1 = IEEE80211_HTINFO_RIFSMODE_PROH;
3500 if (IEEE80211_IS_CHAN_HT40U(bsschan))
3501 ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_ABOVE;
3502 else if (IEEE80211_IS_CHAN_HT40D(bsschan))
3503 ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_BELOW;
3505 ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_NONE;
3506 if (IEEE80211_IS_CHAN_HT40(bsschan))
3507 ht->hi_byte1 |= IEEE80211_HTINFO_TXWIDTH_2040;
3509 /* protection mode */
3510 ht->hi_byte2 = (ht->hi_byte2 &~ PROTMODE) | ic->ic_curhtprotmode;
3512 ieee80211_free_node(ni);
3514 /* XXX propagate to vendor ie's */
3519 * Add body of an HTINFO information element.
3521 * NB: We don't use struct ieee80211_ie_htinfo because we can
3522 * be called to fillin both a standard ie and a compat ie that
3523 * has a vendor OUI at the front.
3526 ieee80211_add_htinfo_body(uint8_t *frm, struct ieee80211_node *ni)
3528 struct ieee80211vap *vap = ni->ni_vap;
3529 struct ieee80211com *ic = ni->ni_ic;
3531 /* pre-zero remainder of ie */
3532 memset(frm, 0, sizeof(struct ieee80211_ie_htinfo) - 2);
3534 /* primary/control channel center */
3535 *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan);
3537 if (vap->iv_flags_ht & IEEE80211_FHT_RIFS)
3538 frm[0] = IEEE80211_HTINFO_RIFSMODE_PERM;
3540 frm[0] = IEEE80211_HTINFO_RIFSMODE_PROH;
3541 if (IEEE80211_IS_CHAN_HT40U(ni->ni_chan))
3542 frm[0] |= IEEE80211_HTINFO_2NDCHAN_ABOVE;
3543 else if (IEEE80211_IS_CHAN_HT40D(ni->ni_chan))
3544 frm[0] |= IEEE80211_HTINFO_2NDCHAN_BELOW;
3546 frm[0] |= IEEE80211_HTINFO_2NDCHAN_NONE;
3547 if (IEEE80211_IS_CHAN_HT40(ni->ni_chan))
3548 frm[0] |= IEEE80211_HTINFO_TXWIDTH_2040;
3550 frm[1] = ic->ic_curhtprotmode;
3555 ieee80211_set_basic_htrates(frm, &ni->ni_htrates);
3556 frm += sizeof(struct ieee80211_ie_htinfo) -
3557 __offsetof(struct ieee80211_ie_htinfo, hi_basicmcsset);
3562 * Add 802.11n HT information element.
3565 ieee80211_add_htinfo(uint8_t *frm, struct ieee80211_node *ni)
3567 frm[0] = IEEE80211_ELEMID_HTINFO;
3568 frm[1] = sizeof(struct ieee80211_ie_htinfo) - 2;
3569 return ieee80211_add_htinfo_body(frm + 2, ni);
3573 * Add Broadcom OUI wrapped standard HTINFO ie; this is
3574 * used for compatibility w/ pre-draft implementations.
3577 ieee80211_add_htinfo_vendor(uint8_t *frm, struct ieee80211_node *ni)
3579 frm[0] = IEEE80211_ELEMID_VENDOR;
3580 frm[1] = 4 + sizeof(struct ieee80211_ie_htinfo) - 2;
3581 frm[2] = (BCM_OUI >> 0) & 0xff;
3582 frm[3] = (BCM_OUI >> 8) & 0xff;
3583 frm[4] = (BCM_OUI >> 16) & 0xff;
3584 frm[5] = BCM_OUI_HTINFO;
3585 return ieee80211_add_htinfo_body(frm + 6, ni);