2 * SPDX-License-Identifier: BSD-2-Clause
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>
33 * IEEE 802.11n protocol support.
39 #include <sys/param.h>
40 #include <sys/kernel.h>
41 #include <sys/malloc.h>
42 #include <sys/systm.h>
43 #include <sys/endian.h>
45 #include <sys/socket.h>
48 #include <net/if_var.h>
49 #include <net/if_media.h>
50 #include <net/ethernet.h>
52 #include <net80211/ieee80211_var.h>
53 #include <net80211/ieee80211_action.h>
54 #include <net80211/ieee80211_input.h>
56 const struct ieee80211_mcs_rates ieee80211_htrates[IEEE80211_HTRATE_MAXSIZE] = {
57 { 13, 14, 27, 30 }, /* MCS 0 */
58 { 26, 29, 54, 60 }, /* MCS 1 */
59 { 39, 43, 81, 90 }, /* MCS 2 */
60 { 52, 58, 108, 120 }, /* MCS 3 */
61 { 78, 87, 162, 180 }, /* MCS 4 */
62 { 104, 116, 216, 240 }, /* MCS 5 */
63 { 117, 130, 243, 270 }, /* MCS 6 */
64 { 130, 144, 270, 300 }, /* MCS 7 */
65 { 26, 29, 54, 60 }, /* MCS 8 */
66 { 52, 58, 108, 120 }, /* MCS 9 */
67 { 78, 87, 162, 180 }, /* MCS 10 */
68 { 104, 116, 216, 240 }, /* MCS 11 */
69 { 156, 173, 324, 360 }, /* MCS 12 */
70 { 208, 231, 432, 480 }, /* MCS 13 */
71 { 234, 260, 486, 540 }, /* MCS 14 */
72 { 260, 289, 540, 600 }, /* MCS 15 */
73 { 39, 43, 81, 90 }, /* MCS 16 */
74 { 78, 87, 162, 180 }, /* MCS 17 */
75 { 117, 130, 243, 270 }, /* MCS 18 */
76 { 156, 173, 324, 360 }, /* MCS 19 */
77 { 234, 260, 486, 540 }, /* MCS 20 */
78 { 312, 347, 648, 720 }, /* MCS 21 */
79 { 351, 390, 729, 810 }, /* MCS 22 */
80 { 390, 433, 810, 900 }, /* MCS 23 */
81 { 52, 58, 108, 120 }, /* MCS 24 */
82 { 104, 116, 216, 240 }, /* MCS 25 */
83 { 156, 173, 324, 360 }, /* MCS 26 */
84 { 208, 231, 432, 480 }, /* MCS 27 */
85 { 312, 347, 648, 720 }, /* MCS 28 */
86 { 416, 462, 864, 960 }, /* MCS 29 */
87 { 468, 520, 972, 1080 }, /* MCS 30 */
88 { 520, 578, 1080, 1200 }, /* MCS 31 */
89 { 0, 0, 12, 13 }, /* MCS 32 */
90 { 78, 87, 162, 180 }, /* MCS 33 */
91 { 104, 116, 216, 240 }, /* MCS 34 */
92 { 130, 144, 270, 300 }, /* MCS 35 */
93 { 117, 130, 243, 270 }, /* MCS 36 */
94 { 156, 173, 324, 360 }, /* MCS 37 */
95 { 195, 217, 405, 450 }, /* MCS 38 */
96 { 104, 116, 216, 240 }, /* MCS 39 */
97 { 130, 144, 270, 300 }, /* MCS 40 */
98 { 130, 144, 270, 300 }, /* MCS 41 */
99 { 156, 173, 324, 360 }, /* MCS 42 */
100 { 182, 202, 378, 420 }, /* MCS 43 */
101 { 182, 202, 378, 420 }, /* MCS 44 */
102 { 208, 231, 432, 480 }, /* MCS 45 */
103 { 156, 173, 324, 360 }, /* MCS 46 */
104 { 195, 217, 405, 450 }, /* MCS 47 */
105 { 195, 217, 405, 450 }, /* MCS 48 */
106 { 234, 260, 486, 540 }, /* MCS 49 */
107 { 273, 303, 567, 630 }, /* MCS 50 */
108 { 273, 303, 567, 630 }, /* MCS 51 */
109 { 312, 347, 648, 720 }, /* MCS 52 */
110 { 130, 144, 270, 300 }, /* MCS 53 */
111 { 156, 173, 324, 360 }, /* MCS 54 */
112 { 182, 202, 378, 420 }, /* MCS 55 */
113 { 156, 173, 324, 360 }, /* MCS 56 */
114 { 182, 202, 378, 420 }, /* MCS 57 */
115 { 208, 231, 432, 480 }, /* MCS 58 */
116 { 234, 260, 486, 540 }, /* MCS 59 */
117 { 208, 231, 432, 480 }, /* MCS 60 */
118 { 234, 260, 486, 540 }, /* MCS 61 */
119 { 260, 289, 540, 600 }, /* MCS 62 */
120 { 260, 289, 540, 600 }, /* MCS 63 */
121 { 286, 318, 594, 660 }, /* MCS 64 */
122 { 195, 217, 405, 450 }, /* MCS 65 */
123 { 234, 260, 486, 540 }, /* MCS 66 */
124 { 273, 303, 567, 630 }, /* MCS 67 */
125 { 234, 260, 486, 540 }, /* MCS 68 */
126 { 273, 303, 567, 630 }, /* MCS 69 */
127 { 312, 347, 648, 720 }, /* MCS 70 */
128 { 351, 390, 729, 810 }, /* MCS 71 */
129 { 312, 347, 648, 720 }, /* MCS 72 */
130 { 351, 390, 729, 810 }, /* MCS 73 */
131 { 390, 433, 810, 900 }, /* MCS 74 */
132 { 390, 433, 810, 900 }, /* MCS 75 */
133 { 429, 477, 891, 990 }, /* MCS 76 */
136 static int ieee80211_ampdu_age = -1; /* threshold for ampdu reorder q (ms) */
137 SYSCTL_PROC(_net_wlan, OID_AUTO, ampdu_age,
138 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
139 &ieee80211_ampdu_age, 0, ieee80211_sysctl_msecs_ticks, "I",
140 "AMPDU max reorder age (ms)");
142 static int ieee80211_recv_bar_ena = 1;
143 SYSCTL_INT(_net_wlan, OID_AUTO, recv_bar, CTLFLAG_RW, &ieee80211_recv_bar_ena,
144 0, "BAR frame processing (ena/dis)");
146 static int ieee80211_addba_timeout = -1;/* timeout for ADDBA response */
147 SYSCTL_PROC(_net_wlan, OID_AUTO, addba_timeout,
148 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
149 &ieee80211_addba_timeout, 0, ieee80211_sysctl_msecs_ticks, "I",
150 "ADDBA request timeout (ms)");
151 static int ieee80211_addba_backoff = -1;/* backoff after max ADDBA requests */
152 SYSCTL_PROC(_net_wlan, OID_AUTO, addba_backoff,
153 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT,
154 &ieee80211_addba_backoff, 0, ieee80211_sysctl_msecs_ticks, "I",
155 "ADDBA request backoff (ms)");
156 static int ieee80211_addba_maxtries = 3;/* max ADDBA requests before backoff */
157 SYSCTL_INT(_net_wlan, OID_AUTO, addba_maxtries, CTLFLAG_RW,
158 &ieee80211_addba_maxtries, 0, "max ADDBA requests sent before backoff");
160 static int ieee80211_bar_timeout = -1; /* timeout waiting for BAR response */
161 static int ieee80211_bar_maxtries = 50;/* max BAR requests before DELBA */
163 static ieee80211_recv_action_func ht_recv_action_ba_addba_request;
164 static ieee80211_recv_action_func ht_recv_action_ba_addba_response;
165 static ieee80211_recv_action_func ht_recv_action_ba_delba;
166 static ieee80211_recv_action_func ht_recv_action_ht_mimopwrsave;
167 static ieee80211_recv_action_func ht_recv_action_ht_txchwidth;
169 static ieee80211_send_action_func ht_send_action_ba_addba;
170 static ieee80211_send_action_func ht_send_action_ba_delba;
171 static ieee80211_send_action_func ht_send_action_ht_txchwidth;
174 ieee80211_ht_init(void)
177 * Setup HT parameters that depends on the clock frequency.
179 ieee80211_ampdu_age = msecs_to_ticks(500);
180 ieee80211_addba_timeout = msecs_to_ticks(250);
181 ieee80211_addba_backoff = msecs_to_ticks(10*1000);
182 ieee80211_bar_timeout = msecs_to_ticks(250);
184 * Register action frame handlers.
186 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA,
187 IEEE80211_ACTION_BA_ADDBA_REQUEST, ht_recv_action_ba_addba_request);
188 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA,
189 IEEE80211_ACTION_BA_ADDBA_RESPONSE, ht_recv_action_ba_addba_response);
190 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA,
191 IEEE80211_ACTION_BA_DELBA, ht_recv_action_ba_delba);
192 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_HT,
193 IEEE80211_ACTION_HT_MIMOPWRSAVE, ht_recv_action_ht_mimopwrsave);
194 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_HT,
195 IEEE80211_ACTION_HT_TXCHWIDTH, ht_recv_action_ht_txchwidth);
197 ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA,
198 IEEE80211_ACTION_BA_ADDBA_REQUEST, ht_send_action_ba_addba);
199 ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA,
200 IEEE80211_ACTION_BA_ADDBA_RESPONSE, ht_send_action_ba_addba);
201 ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA,
202 IEEE80211_ACTION_BA_DELBA, ht_send_action_ba_delba);
203 ieee80211_send_action_register(IEEE80211_ACTION_CAT_HT,
204 IEEE80211_ACTION_HT_TXCHWIDTH, ht_send_action_ht_txchwidth);
206 SYSINIT(wlan_ht, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_ht_init, NULL);
208 static int ieee80211_ampdu_enable(struct ieee80211_node *ni,
209 struct ieee80211_tx_ampdu *tap);
210 static int ieee80211_addba_request(struct ieee80211_node *ni,
211 struct ieee80211_tx_ampdu *tap,
212 int dialogtoken, int baparamset, int batimeout);
213 static int ieee80211_addba_response(struct ieee80211_node *ni,
214 struct ieee80211_tx_ampdu *tap,
215 int code, int baparamset, int batimeout);
216 static void ieee80211_addba_stop(struct ieee80211_node *ni,
217 struct ieee80211_tx_ampdu *tap);
218 static void null_addba_response_timeout(struct ieee80211_node *ni,
219 struct ieee80211_tx_ampdu *tap);
221 static void ieee80211_bar_response(struct ieee80211_node *ni,
222 struct ieee80211_tx_ampdu *tap, int status);
223 static void ampdu_tx_stop(struct ieee80211_tx_ampdu *tap);
224 static void bar_stop_timer(struct ieee80211_tx_ampdu *tap);
225 static int ampdu_rx_start(struct ieee80211_node *, struct ieee80211_rx_ampdu *,
226 int baparamset, int batimeout, int baseqctl);
227 static void ampdu_rx_stop(struct ieee80211_node *, struct ieee80211_rx_ampdu *);
230 ieee80211_ht_attach(struct ieee80211com *ic)
232 /* setup default aggregation policy */
233 ic->ic_recv_action = ieee80211_recv_action;
234 ic->ic_send_action = ieee80211_send_action;
235 ic->ic_ampdu_enable = ieee80211_ampdu_enable;
236 ic->ic_addba_request = ieee80211_addba_request;
237 ic->ic_addba_response = ieee80211_addba_response;
238 ic->ic_addba_response_timeout = null_addba_response_timeout;
239 ic->ic_addba_stop = ieee80211_addba_stop;
240 ic->ic_bar_response = ieee80211_bar_response;
241 ic->ic_ampdu_rx_start = ampdu_rx_start;
242 ic->ic_ampdu_rx_stop = ampdu_rx_stop;
244 ic->ic_htprotmode = IEEE80211_PROT_RTSCTS;
245 ic->ic_curhtprotmode = IEEE80211_HTINFO_OPMODE_PURE;
249 ieee80211_ht_detach(struct ieee80211com *ic)
254 ieee80211_ht_vattach(struct ieee80211vap *vap)
257 /* driver can override defaults */
258 vap->iv_ampdu_rxmax = IEEE80211_HTCAP_MAXRXAMPDU_8K;
259 vap->iv_ampdu_density = IEEE80211_HTCAP_MPDUDENSITY_NA;
260 vap->iv_ampdu_limit = vap->iv_ampdu_rxmax;
261 vap->iv_amsdu_limit = vap->iv_htcaps & IEEE80211_HTCAP_MAXAMSDU;
262 /* tx aggregation traffic thresholds */
263 vap->iv_ampdu_mintraffic[WME_AC_BK] = 128;
264 vap->iv_ampdu_mintraffic[WME_AC_BE] = 64;
265 vap->iv_ampdu_mintraffic[WME_AC_VO] = 32;
266 vap->iv_ampdu_mintraffic[WME_AC_VI] = 32;
268 vap->iv_htprotmode = IEEE80211_PROT_RTSCTS;
269 vap->iv_curhtprotmode = IEEE80211_HTINFO_OPMODE_PURE;
271 if (vap->iv_htcaps & IEEE80211_HTC_HT) {
273 * Device is HT capable; enable all HT-related
274 * facilities by default.
275 * XXX these choices may be too aggressive.
277 vap->iv_flags_ht |= IEEE80211_FHT_HT
278 | IEEE80211_FHT_HTCOMPAT
280 if (vap->iv_htcaps & IEEE80211_HTCAP_SHORTGI20)
281 vap->iv_flags_ht |= IEEE80211_FHT_SHORTGI20;
282 /* XXX infer from channel list? */
283 if (vap->iv_htcaps & IEEE80211_HTCAP_CHWIDTH40) {
284 vap->iv_flags_ht |= IEEE80211_FHT_USEHT40;
285 if (vap->iv_htcaps & IEEE80211_HTCAP_SHORTGI40)
286 vap->iv_flags_ht |= IEEE80211_FHT_SHORTGI40;
288 /* enable RIFS if capable */
289 if (vap->iv_htcaps & IEEE80211_HTC_RIFS)
290 vap->iv_flags_ht |= IEEE80211_FHT_RIFS;
292 /* NB: A-MPDU and A-MSDU rx are mandated, these are tx only */
293 vap->iv_flags_ht |= IEEE80211_FHT_AMPDU_RX;
294 if (vap->iv_htcaps & IEEE80211_HTC_AMPDU)
295 vap->iv_flags_ht |= IEEE80211_FHT_AMPDU_TX;
296 vap->iv_flags_ht |= IEEE80211_FHT_AMSDU_RX;
297 if (vap->iv_htcaps & IEEE80211_HTC_AMSDU)
298 vap->iv_flags_ht |= IEEE80211_FHT_AMSDU_TX;
300 if (vap->iv_htcaps & IEEE80211_HTCAP_TXSTBC)
301 vap->iv_flags_ht |= IEEE80211_FHT_STBC_TX;
302 if (vap->iv_htcaps & IEEE80211_HTCAP_RXSTBC)
303 vap->iv_flags_ht |= IEEE80211_FHT_STBC_RX;
305 if (vap->iv_htcaps & IEEE80211_HTCAP_LDPC)
306 vap->iv_flags_ht |= IEEE80211_FHT_LDPC_RX;
307 if (vap->iv_htcaps & IEEE80211_HTC_TXLDPC)
308 vap->iv_flags_ht |= IEEE80211_FHT_LDPC_TX;
310 /* NB: disable default legacy WDS, too many issues right now */
311 if (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY)
312 vap->iv_flags_ht &= ~IEEE80211_FHT_HT;
316 ieee80211_ht_vdetach(struct ieee80211vap *vap)
321 ht_getrate(struct ieee80211com *ic, int index, enum ieee80211_phymode mode,
326 mword = ieee80211_rate2media(ic, index | IEEE80211_RATE_MCS, mode);
327 if (IFM_SUBTYPE(mword) != IFM_IEEE80211_MCS)
331 rate = ieee80211_htrates[index].ht20_rate_800ns;
334 rate = ieee80211_htrates[index].ht20_rate_400ns;
337 rate = ieee80211_htrates[index].ht40_rate_800ns;
340 rate = ieee80211_htrates[index].ht40_rate_400ns;
346 static struct printranges {
357 { 32, 0, 1, 2, IEEE80211_HTC_TXMCS32 },
358 { 33, 38, 2, 0, IEEE80211_HTC_TXUNEQUAL },
359 { 39, 52, 3, 0, IEEE80211_HTC_TXUNEQUAL },
360 { 53, 76, 4, 0, IEEE80211_HTC_TXUNEQUAL },
365 ht_rateprint(struct ieee80211com *ic, enum ieee80211_phymode mode, int ratetype)
367 int minrate, maxrate;
368 struct printranges *range;
370 for (range = ranges; range->txstream != 0; range++) {
371 if (ic->ic_txstream < range->txstream)
373 if (range->htcapflags &&
374 (ic->ic_htcaps & range->htcapflags) == 0)
376 if (ratetype < range->ratetype)
378 minrate = ht_getrate(ic, range->minmcs, mode, ratetype);
379 maxrate = ht_getrate(ic, range->maxmcs, mode, ratetype);
381 ic_printf(ic, "MCS %d-%d: %d%sMbps - %d%sMbps\n",
382 range->minmcs, range->maxmcs,
383 minrate/2, ((minrate & 0x1) != 0 ? ".5" : ""),
384 maxrate/2, ((maxrate & 0x1) != 0 ? ".5" : ""));
386 ic_printf(ic, "MCS %d: %d%sMbps\n", range->minmcs,
387 minrate/2, ((minrate & 0x1) != 0 ? ".5" : ""));
393 ht_announce(struct ieee80211com *ic, enum ieee80211_phymode mode)
395 const char *modestr = ieee80211_phymode_name[mode];
397 ic_printf(ic, "%s MCS 20MHz\n", modestr);
398 ht_rateprint(ic, mode, 0);
399 if (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20) {
400 ic_printf(ic, "%s MCS 20MHz SGI\n", modestr);
401 ht_rateprint(ic, mode, 1);
403 if (ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) {
404 ic_printf(ic, "%s MCS 40MHz:\n", modestr);
405 ht_rateprint(ic, mode, 2);
407 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) &&
408 (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40)) {
409 ic_printf(ic, "%s MCS 40MHz SGI:\n", modestr);
410 ht_rateprint(ic, mode, 3);
415 ieee80211_ht_announce(struct ieee80211com *ic)
418 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) ||
419 isset(ic->ic_modecaps, IEEE80211_MODE_11NG))
420 ic_printf(ic, "%dT%dR\n", ic->ic_txstream, ic->ic_rxstream);
421 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA))
422 ht_announce(ic, IEEE80211_MODE_11NA);
423 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NG))
424 ht_announce(ic, IEEE80211_MODE_11NG);
428 ieee80211_init_suphtrates(struct ieee80211com *ic)
430 #define ADDRATE(x) do { \
431 htrateset->rs_rates[htrateset->rs_nrates] = x; \
432 htrateset->rs_nrates++; \
434 struct ieee80211_htrateset *htrateset = &ic->ic_sup_htrates;
437 memset(htrateset, 0, sizeof(struct ieee80211_htrateset));
438 for (i = 0; i < ic->ic_txstream * 8; i++)
440 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) &&
441 (ic->ic_htcaps & IEEE80211_HTC_TXMCS32))
443 if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL) {
444 if (ic->ic_txstream >= 2) {
445 for (i = 33; i <= 38; i++)
448 if (ic->ic_txstream >= 3) {
449 for (i = 39; i <= 52; i++)
452 if (ic->ic_txstream == 4) {
453 for (i = 53; i <= 76; i++)
461 * Receive processing.
465 * Decap the encapsulated A-MSDU frames and dispatch all but
466 * the last for delivery. The last frame is returned for
467 * delivery via the normal path.
470 ieee80211_decap_amsdu(struct ieee80211_node *ni, struct mbuf *m)
472 struct ieee80211vap *vap = ni->ni_vap;
476 /* discard 802.3 header inserted by ieee80211_decap */
477 m_adj(m, sizeof(struct ether_header));
479 vap->iv_stats.is_amsdu_decap++;
483 * Decap the first frame, bust it apart from the
484 * remainder and deliver. We leave the last frame
485 * delivery to the caller (for consistency with other
486 * code paths, could also do it here).
488 m = ieee80211_decap1(m, &framelen);
490 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
491 ni->ni_macaddr, "a-msdu", "%s", "decap failed");
492 vap->iv_stats.is_amsdu_tooshort++;
495 if (m->m_pkthdr.len == framelen)
497 n = m_split(m, framelen, IEEE80211_M_NOWAIT);
499 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
500 ni->ni_macaddr, "a-msdu",
501 "%s", "unable to split encapsulated frames");
502 vap->iv_stats.is_amsdu_split++;
503 m_freem(m); /* NB: must reclaim */
506 vap->iv_deliver_data(vap, ni, m);
509 * Remove frame contents; each intermediate frame
510 * is required to be aligned to a 4-byte boundary.
513 m_adj(m, roundup2(framelen, 4) - framelen); /* padding */
515 return m; /* last delivered by caller */
519 ampdu_rx_purge_slot(struct ieee80211_rx_ampdu *rap, int i)
523 /* Walk the queue, removing frames as appropriate */
524 while (mbufq_len(&rap->rxa_mq[i]) != 0) {
525 m = mbufq_dequeue(&rap->rxa_mq[i]);
528 rap->rxa_qbytes -= m->m_pkthdr.len;
535 * Add the given frame to the current RX reorder slot.
537 * For future offloaded A-MSDU handling where multiple frames with
538 * the same sequence number show up here, this routine will append
539 * those frames as long as they're appropriately tagged.
542 ampdu_rx_add_slot(struct ieee80211_rx_ampdu *rap, int off, int tid,
544 struct ieee80211_node *ni,
546 const struct ieee80211_rx_stats *rxs)
548 const struct ieee80211_rx_stats *rxs_final = NULL;
549 struct ieee80211vap *vap = ni->ni_vap;
551 #define PROCESS 0 /* caller should process frame */
552 #define CONSUMED 1 /* frame consumed, caller does nothing */
555 * Figure out if this is a duplicate frame for the given slot.
557 * We're assuming that the driver will hand us all the frames
558 * for a given AMSDU decap pass and if we get /a/ frame
559 * for an AMSDU decap then we'll get all of them.
561 * The tricksy bit is that we don't know when the /end/ of
562 * the decap pass is, because we aren't tracking state here
563 * per-slot to know that we've finished receiving the frame list.
565 * The driver sets RX_F_AMSDU and RX_F_AMSDU_MORE to tell us
566 * what's going on; so ideally we'd just check the frame at the
567 * end of the reassembly slot to see if its F_AMSDU w/ no F_AMSDU_MORE -
568 * that means we've received the whole AMSDU decap pass.
572 * Get the rxs of the final mbuf in the slot, if one exists.
574 if (mbufq_len(&rap->rxa_mq[off]) != 0) {
575 rxs_final = ieee80211_get_rx_params_ptr(mbufq_last(&rap->rxa_mq[off]));
578 /* Default to tossing the duplicate frame */
582 * Check to see if the final frame has F_AMSDU and F_AMSDU set, AND
583 * this frame has F_AMSDU set (MORE or otherwise.) That's a sign
584 * that more can come.
587 if ((rxs != NULL) && (rxs_final != NULL) &&
588 ieee80211_check_rxseq_amsdu(rxs) &&
589 ieee80211_check_rxseq_amsdu(rxs_final)) {
590 if (! ieee80211_check_rxseq_amsdu_more(rxs_final)) {
592 * amsdu_more() returning 0 means "it's not the
593 * final frame" so we can append more
601 * If the list is empty OR we have determined we can put more
602 * driver decap'ed AMSDU frames in here, then insert.
604 if ((mbufq_len(&rap->rxa_mq[off]) == 0) || (toss_dup == 0)) {
605 if (mbufq_enqueue(&rap->rxa_mq[off], m) != 0) {
606 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT | IEEE80211_MSG_11N,
609 "seqno %u tid %u BA win <%u:%u> off=%d, qlen=%d, maxqlen=%d",
610 rxseq, tid, rap->rxa_start,
611 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
613 mbufq_len(&rap->rxa_mq[off]),
614 rap->rxa_mq[off].mq_maxlen);
615 /* XXX error count */
620 rap->rxa_qbytes += m->m_pkthdr.len;
621 vap->iv_stats.is_ampdu_rx_reorder++;
623 * Statistics for AMSDU decap.
625 if (rxs != NULL && ieee80211_check_rxseq_amsdu(rxs)) {
626 if (ieee80211_check_rxseq_amsdu_more(rxs)) {
627 /* more=1, AMSDU, end of batch */
628 IEEE80211_NODE_STAT(ni, rx_amsdu_more_end);
630 IEEE80211_NODE_STAT(ni, rx_amsdu_more);
634 IEEE80211_DISCARD_MAC(vap,
635 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N,
636 ni->ni_macaddr, "a-mpdu duplicate",
637 "seqno %u tid %u BA win <%u:%u>",
638 rxseq, tid, rap->rxa_start,
639 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1));
641 IEEE80211_DISCARD_MAC(vap,
642 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N,
643 ni->ni_macaddr, "a-mpdu duplicate",
644 "seqno %d tid %u pktflags 0x%08x\n",
645 rxseq, tid, rxs->c_pktflags);
647 if (rxs_final != NULL) {
648 IEEE80211_DISCARD_MAC(vap,
649 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N,
650 ni->ni_macaddr, "a-mpdu duplicate",
651 "final: pktflags 0x%08x\n",
652 rxs_final->c_pktflags);
654 vap->iv_stats.is_rx_dup++;
655 IEEE80211_NODE_STAT(ni, rx_dup);
664 * Purge all frames in the A-MPDU re-order queue.
667 ampdu_rx_purge(struct ieee80211_rx_ampdu *rap)
671 for (i = 0; i < rap->rxa_wnd; i++) {
672 ampdu_rx_purge_slot(rap, i);
673 if (rap->rxa_qframes == 0)
676 KASSERT(rap->rxa_qbytes == 0 && rap->rxa_qframes == 0,
677 ("lost %u data, %u frames on ampdu rx q",
678 rap->rxa_qbytes, rap->rxa_qframes));
682 ieee80211_ampdu_rx_init_rap(struct ieee80211_node *ni,
683 struct ieee80211_rx_ampdu *rap)
687 /* XXX TODO: ensure the queues are empty */
688 memset(rap, 0, sizeof(*rap));
689 for (i = 0; i < IEEE80211_AGGR_BAWMAX; i++)
690 mbufq_init(&rap->rxa_mq[i], 256);
694 * Start A-MPDU rx/re-order processing for the specified TID.
697 ampdu_rx_start(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap,
698 int baparamset, int batimeout, int baseqctl)
700 struct ieee80211vap *vap = ni->ni_vap;
701 int bufsiz = _IEEE80211_MASKSHIFT(baparamset, IEEE80211_BAPS_BUFSIZ);
703 if (rap->rxa_flags & IEEE80211_AGGR_RUNNING) {
705 * AMPDU previously setup and not terminated with a DELBA,
706 * flush the reorder q's in case anything remains.
710 ieee80211_ampdu_rx_init_rap(ni, rap);
711 rap->rxa_wnd = (bufsiz == 0) ?
712 IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX);
713 rap->rxa_start = _IEEE80211_MASKSHIFT(baseqctl, IEEE80211_BASEQ_START);
714 rap->rxa_flags |= IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_XCHGPEND;
716 /* XXX this should be a configuration flag */
717 if ((vap->iv_htcaps & IEEE80211_HTC_RX_AMSDU_AMPDU) &&
718 (_IEEE80211_MASKSHIFT(baparamset, IEEE80211_BAPS_AMSDU)))
719 rap->rxa_flags |= IEEE80211_AGGR_AMSDU;
721 rap->rxa_flags &= ~IEEE80211_AGGR_AMSDU;
727 * Public function; manually setup the RX ampdu state.
730 ieee80211_ampdu_rx_start_ext(struct ieee80211_node *ni, int tid, int seq, int baw)
732 struct ieee80211_rx_ampdu *rap;
734 /* XXX TODO: sanity check tid, seq, baw */
736 rap = &ni->ni_rx_ampdu[tid];
738 if (rap->rxa_flags & IEEE80211_AGGR_RUNNING) {
740 * AMPDU previously setup and not terminated with a DELBA,
741 * flush the reorder q's in case anything remains.
746 ieee80211_ampdu_rx_init_rap(ni, rap);
748 rap->rxa_wnd = (baw== 0) ?
749 IEEE80211_AGGR_BAWMAX : min(baw, IEEE80211_AGGR_BAWMAX);
751 /* Wait for the first RX frame, use that as BAW */
753 rap->rxa_flags |= IEEE80211_AGGR_WAITRX;
755 rap->rxa_start = seq;
757 rap->rxa_flags |= IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_XCHGPEND;
759 /* XXX TODO: no amsdu flag */
761 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, ni,
762 "%s: tid=%d, start=%d, wnd=%d, flags=0x%08x",
773 * Public function; manually stop the RX AMPDU state.
776 ieee80211_ampdu_rx_stop_ext(struct ieee80211_node *ni, int tid)
778 struct ieee80211_rx_ampdu *rap;
780 /* XXX TODO: sanity check tid, seq, baw */
781 rap = &ni->ni_rx_ampdu[tid];
782 ampdu_rx_stop(ni, rap);
786 * Stop A-MPDU rx processing for the specified TID.
789 ampdu_rx_stop(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap)
793 rap->rxa_flags &= ~(IEEE80211_AGGR_RUNNING
794 | IEEE80211_AGGR_XCHGPEND
795 | IEEE80211_AGGR_WAITRX);
799 * Dispatch a frame from the A-MPDU reorder queue. The
800 * frame is fed back into ieee80211_input marked with an
801 * M_AMPDU_MPDU flag so it doesn't come back to us (it also
802 * permits ieee80211_input to optimize re-processing).
805 ampdu_dispatch(struct ieee80211_node *ni, struct mbuf *m)
807 m->m_flags |= M_AMPDU_MPDU; /* bypass normal processing */
808 /* NB: rssi and noise are ignored w/ M_AMPDU_MPDU set */
809 (void) ieee80211_input(ni, m, 0, 0);
813 ampdu_dispatch_slot(struct ieee80211_rx_ampdu *rap, struct ieee80211_node *ni,
819 while (mbufq_len(&rap->rxa_mq[i]) != 0) {
820 m = mbufq_dequeue(&rap->rxa_mq[i]);
825 rap->rxa_qbytes -= m->m_pkthdr.len;
828 ampdu_dispatch(ni, m);
834 ampdu_rx_moveup(struct ieee80211_rx_ampdu *rap, struct ieee80211_node *ni,
837 struct ieee80211vap *vap = ni->ni_vap;
840 * If frames remain, copy the mbuf pointers down so
841 * they correspond to the offsets in the new window.
843 if (rap->rxa_qframes != 0) {
844 int n = rap->rxa_qframes, j;
845 for (j = i+1; j < rap->rxa_wnd; j++) {
847 * Concat the list contents over, which will
848 * blank the source list for us.
850 if (mbufq_len(&rap->rxa_mq[j]) != 0) {
851 n = n - mbufq_len(&rap->rxa_mq[j]);
852 mbufq_concat(&rap->rxa_mq[j-i], &rap->rxa_mq[j]);
853 KASSERT(n >= 0, ("%s: n < 0 (%d)", __func__, n));
858 KASSERT(n == 0, ("%s: lost %d frames, qframes %d off %d "
859 "BA win <%d:%d> winstart %d",
860 __func__, n, rap->rxa_qframes, i, rap->rxa_start,
861 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
863 vap->iv_stats.is_ampdu_rx_copy += rap->rxa_qframes;
868 * Dispatch as many frames as possible from the re-order queue.
869 * Frames will always be "at the front"; we process all frames
870 * up to the first empty slot in the window. On completion we
871 * cleanup state if there are still pending frames in the current
872 * BA window. We assume the frame at slot 0 is already handled
873 * by the caller; we always start at slot 1.
876 ampdu_rx_dispatch(struct ieee80211_rx_ampdu *rap, struct ieee80211_node *ni)
878 struct ieee80211vap *vap = ni->ni_vap;
881 /* flush run of frames */
883 for (i = 1; i < rap->rxa_wnd; i++) {
884 r = ampdu_dispatch_slot(rap, ni, i);
891 ampdu_rx_moveup(rap, ni, i, -1);
894 * Adjust the start of the BA window to
895 * reflect the frames just dispatched.
897 rap->rxa_start = IEEE80211_SEQ_ADD(rap->rxa_start, i);
898 vap->iv_stats.is_ampdu_rx_oor += r2;
900 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, ni,
901 "%s: moved slot up %d slots to start at %d (%d frames)",
909 * Dispatch all frames in the A-MPDU re-order queue.
912 ampdu_rx_flush(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap)
916 for (i = 0; i < rap->rxa_wnd; i++) {
917 r = ampdu_dispatch_slot(rap, ni, i);
920 ni->ni_vap->iv_stats.is_ampdu_rx_oor += r;
922 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, ni,
923 "%s: moved slot up %d slots to start at %d (%d frames)",
929 if (rap->rxa_qframes == 0)
935 * Dispatch all frames in the A-MPDU re-order queue
936 * preceding the specified sequence number. This logic
937 * handles window moves due to a received MSDU or BAR.
940 ampdu_rx_flush_upto(struct ieee80211_node *ni,
941 struct ieee80211_rx_ampdu *rap, ieee80211_seq winstart)
943 struct ieee80211vap *vap = ni->ni_vap;
948 * Flush any complete MSDU's with a sequence number lower
949 * than winstart. Gaps may exist. Note that we may actually
950 * dispatch frames past winstart if a run continues; this is
951 * an optimization that avoids having to do a separate pass
952 * to dispatch frames after moving the BA window start.
954 seqno = rap->rxa_start;
955 for (i = 0; i < rap->rxa_wnd; i++) {
956 if ((r = mbufq_len(&rap->rxa_mq[i])) != 0) {
957 (void) ampdu_dispatch_slot(rap, ni, i);
959 if (!IEEE80211_SEQ_BA_BEFORE(seqno, winstart))
962 vap->iv_stats.is_ampdu_rx_oor += r;
963 seqno = IEEE80211_SEQ_INC(seqno);
965 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, ni,
966 "%s: moved slot up %d slots to start at %d (%d frames)",
974 * If frames remain, copy the mbuf pointers down so
975 * they correspond to the offsets in the new window.
977 ampdu_rx_moveup(rap, ni, i, winstart);
980 * Move the start of the BA window; we use the
981 * sequence number of the last MSDU that was
982 * passed up the stack+1 or winstart if stopped on
983 * a gap in the reorder buffer.
985 rap->rxa_start = seqno;
989 * Process a received QoS data frame for an HT station. Handle
990 * A-MPDU reordering: if this frame is received out of order
991 * and falls within the BA window hold onto it. Otherwise if
992 * this frame completes a run, flush any pending frames. We
993 * return 1 if the frame is consumed. A 0 is returned if
994 * the frame should be processed normally by the caller.
996 * A-MSDU: handle hardware decap'ed A-MSDU frames that are
997 * pretending to be MPDU's. They're dispatched directly if
998 * able; or attempted to put into the receive reordering slot.
1001 ieee80211_ampdu_reorder(struct ieee80211_node *ni, struct mbuf *m,
1002 const struct ieee80211_rx_stats *rxs)
1004 #define PROCESS 0 /* caller should process frame */
1005 #define CONSUMED 1 /* frame consumed, caller does nothing */
1006 struct ieee80211vap *vap = ni->ni_vap;
1007 struct ieee80211_qosframe *wh;
1008 struct ieee80211_rx_ampdu *rap;
1009 ieee80211_seq rxseq;
1012 int amsdu = ieee80211_check_rxseq_amsdu(rxs);
1013 int amsdu_end = ieee80211_check_rxseq_amsdu_more(rxs);
1015 KASSERT((m->m_flags & (M_AMPDU | M_AMPDU_MPDU)) == M_AMPDU,
1016 ("!a-mpdu or already re-ordered, flags 0x%x", m->m_flags));
1017 KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT sta"));
1019 /* NB: m_len known to be sufficient */
1020 wh = mtod(m, struct ieee80211_qosframe *);
1021 if (wh->i_fc[0] != IEEE80211_FC0_QOSDATA) {
1023 * Not QoS data, shouldn't get here but just
1024 * return it to the caller for processing.
1030 * 802.11-2012 9.3.2.10 - Duplicate detection and recovery.
1032 * Multicast QoS data frames are checked against a different
1033 * counter, not the per-TID counter.
1035 if (IEEE80211_IS_MULTICAST(wh->i_addr1))
1038 tid = ieee80211_getqos(wh)[0];
1039 tid &= IEEE80211_QOS_TID;
1040 rap = &ni->ni_rx_ampdu[tid];
1041 if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) {
1043 * No ADDBA request yet, don't touch.
1047 rxseq = le16toh(*(uint16_t *)wh->i_seq);
1048 if ((rxseq & IEEE80211_SEQ_FRAG_MASK) != 0) {
1050 * Fragments are not allowed; toss.
1052 IEEE80211_DISCARD_MAC(vap,
1053 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr,
1054 "A-MPDU", "fragment, rxseq 0x%x tid %u%s", rxseq, tid,
1055 wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : "");
1056 vap->iv_stats.is_ampdu_rx_drop++;
1057 IEEE80211_NODE_STAT(ni, rx_drop);
1061 rxseq >>= IEEE80211_SEQ_SEQ_SHIFT;
1065 * Handle waiting for the first frame to define the BAW.
1066 * Some firmware doesn't provide the RX of the starting point
1067 * of the BAW and we have to cope.
1069 if (rap->rxa_flags & IEEE80211_AGGR_WAITRX) {
1070 rap->rxa_flags &= ~IEEE80211_AGGR_WAITRX;
1071 rap->rxa_start = rxseq;
1074 if (rxseq == rap->rxa_start) {
1076 * First frame in window.
1078 if (rap->rxa_qframes != 0) {
1080 * Dispatch as many packets as we can.
1082 KASSERT((mbufq_len(&rap->rxa_mq[0]) == 0), ("unexpected dup"));
1083 ampdu_dispatch(ni, m);
1084 ampdu_rx_dispatch(rap, ni);
1088 * In order; advance window if needed and notify
1089 * caller to dispatch directly.
1093 rap->rxa_start = IEEE80211_SEQ_INC(rxseq);
1094 IEEE80211_NODE_STAT(ni, rx_amsdu_more_end);
1096 IEEE80211_NODE_STAT(ni, rx_amsdu_more);
1099 rap->rxa_start = IEEE80211_SEQ_INC(rxseq);
1105 * Frame is out of order; store if in the BA window.
1107 /* calculate offset in BA window */
1108 off = IEEE80211_SEQ_SUB(rxseq, rap->rxa_start);
1109 if (off < rap->rxa_wnd) {
1111 * Common case (hopefully): in the BA window.
1112 * Sec 9.10.7.6.2 a) (p.137)
1116 * Check for frames sitting too long in the reorder queue.
1117 * This should only ever happen if frames are not delivered
1118 * without the sender otherwise notifying us (e.g. with a
1119 * BAR to move the window). Typically this happens because
1120 * of vendor bugs that cause the sequence number to jump.
1121 * When this happens we get a gap in the reorder queue that
1122 * leaves frame sitting on the queue until they get pushed
1123 * out due to window moves. When the vendor does not send
1124 * BAR this move only happens due to explicit packet sends
1126 * NB: we only track the time of the oldest frame in the
1127 * reorder q; this means that if we flush we might push
1128 * frames that still "new"; if this happens then subsequent
1129 * frames will result in BA window moves which cost something
1130 * but is still better than a big throughput dip.
1132 if (rap->rxa_qframes != 0) {
1133 /* XXX honor batimeout? */
1134 if (ticks - rap->rxa_age > ieee80211_ampdu_age) {
1136 * Too long since we received the first
1137 * frame; flush the reorder buffer.
1139 if (rap->rxa_qframes != 0) {
1140 vap->iv_stats.is_ampdu_rx_age +=
1142 ampdu_rx_flush(ni, rap);
1145 * Advance the window if needed and notify
1146 * the caller to dispatch directly.
1151 IEEE80211_SEQ_INC(rxseq);
1152 IEEE80211_NODE_STAT(ni,
1155 IEEE80211_NODE_STAT(ni,
1160 IEEE80211_SEQ_INC(rxseq);
1166 * First frame, start aging timer.
1168 rap->rxa_age = ticks;
1171 /* save packet - this consumes, no matter what */
1172 ampdu_rx_add_slot(rap, off, tid, rxseq, ni, m, rxs);
1175 if (off < IEEE80211_SEQ_BA_RANGE) {
1177 * Outside the BA window, but within range;
1178 * flush the reorder q and move the window.
1179 * Sec 9.10.7.6.2 b) (p.138)
1181 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni,
1182 "move BA win <%u:%u> (%u frames) rxseq %u tid %u",
1184 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
1185 rap->rxa_qframes, rxseq, tid);
1186 vap->iv_stats.is_ampdu_rx_move++;
1189 * The spec says to flush frames up to but not including:
1190 * WinStart_B = rxseq - rap->rxa_wnd + 1
1191 * Then insert the frame or notify the caller to process
1192 * it immediately. We can safely do this by just starting
1193 * over again because we know the frame will now be within
1196 /* NB: rxa_wnd known to be >0 */
1197 ampdu_rx_flush_upto(ni, rap,
1198 IEEE80211_SEQ_SUB(rxseq, rap->rxa_wnd-1));
1202 * Outside the BA window and out of range; toss.
1203 * Sec 9.10.7.6.2 c) (p.138)
1205 IEEE80211_DISCARD_MAC(vap,
1206 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr,
1207 "MPDU", "BA win <%u:%u> (%u frames) rxseq %u tid %u%s",
1209 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
1210 rap->rxa_qframes, rxseq, tid,
1211 wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : "");
1212 vap->iv_stats.is_ampdu_rx_drop++;
1213 IEEE80211_NODE_STAT(ni, rx_drop);
1222 * Process a BAR ctl frame. Dispatch all frames up to
1223 * the sequence number of the frame. If this frame is
1224 * out of range it's discarded.
1227 ieee80211_recv_bar(struct ieee80211_node *ni, struct mbuf *m0)
1229 struct ieee80211vap *vap = ni->ni_vap;
1230 struct ieee80211_frame_bar *wh;
1231 struct ieee80211_rx_ampdu *rap;
1232 ieee80211_seq rxseq;
1235 if (!ieee80211_recv_bar_ena) {
1237 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_11N,
1238 ni->ni_macaddr, "BAR", "%s", "processing disabled");
1240 vap->iv_stats.is_ampdu_bar_bad++;
1243 wh = mtod(m0, struct ieee80211_frame_bar *);
1244 /* XXX check basic BAR */
1245 tid = _IEEE80211_MASKSHIFT(le16toh(wh->i_ctl), IEEE80211_BAR_TID);
1246 rap = &ni->ni_rx_ampdu[tid];
1247 if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) {
1249 * No ADDBA request yet, don't touch.
1251 IEEE80211_DISCARD_MAC(vap,
1252 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N,
1253 ni->ni_macaddr, "BAR", "no BA stream, tid %u", tid);
1254 vap->iv_stats.is_ampdu_bar_bad++;
1257 vap->iv_stats.is_ampdu_bar_rx++;
1258 rxseq = le16toh(wh->i_seq) >> IEEE80211_SEQ_SEQ_SHIFT;
1259 if (rxseq == rap->rxa_start)
1261 /* calculate offset in BA window */
1262 off = IEEE80211_SEQ_SUB(rxseq, rap->rxa_start);
1263 if (off < IEEE80211_SEQ_BA_RANGE) {
1265 * Flush the reorder q up to rxseq and move the window.
1266 * Sec 9.10.7.6.3 a) (p.138)
1268 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni,
1269 "BAR moves BA win <%u:%u> (%u frames) rxseq %u tid %u",
1271 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
1272 rap->rxa_qframes, rxseq, tid);
1273 vap->iv_stats.is_ampdu_bar_move++;
1275 ampdu_rx_flush_upto(ni, rap, rxseq);
1276 if (off >= rap->rxa_wnd) {
1278 * BAR specifies a window start to the right of BA
1279 * window; we must move it explicitly since
1280 * ampdu_rx_flush_upto will not.
1282 rap->rxa_start = rxseq;
1286 * Out of range; toss.
1287 * Sec 9.10.7.6.3 b) (p.138)
1289 IEEE80211_DISCARD_MAC(vap,
1290 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr,
1291 "BAR", "BA win <%u:%u> (%u frames) rxseq %u tid %u%s",
1293 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
1294 rap->rxa_qframes, rxseq, tid,
1295 wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : "");
1296 vap->iv_stats.is_ampdu_bar_oow++;
1297 IEEE80211_NODE_STAT(ni, rx_drop);
1302 * Setup HT-specific state in a node. Called only
1303 * when HT use is negotiated so we don't do extra
1304 * work for temporary and/or legacy sta's.
1307 ieee80211_ht_node_init(struct ieee80211_node *ni)
1309 struct ieee80211_tx_ampdu *tap;
1312 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
1318 if (ni->ni_flags & IEEE80211_NODE_HT) {
1320 * Clean AMPDU state on re-associate. This handles the case
1321 * where a station leaves w/o notifying us and then returns
1322 * before node is reaped for inactivity.
1324 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
1326 "%s: calling cleanup (%p)",
1328 ieee80211_ht_node_cleanup(ni);
1330 for (tid = 0; tid < WME_NUM_TID; tid++) {
1331 tap = &ni->ni_tx_ampdu[tid];
1334 ieee80211_txampdu_init_pps(tap);
1335 /* NB: further initialization deferred */
1336 ieee80211_ampdu_rx_init_rap(ni, &ni->ni_rx_ampdu[tid]);
1338 ni->ni_flags |= IEEE80211_NODE_HT | IEEE80211_NODE_AMPDU |
1339 IEEE80211_NODE_AMSDU;
1343 * Cleanup HT-specific state in a node. Called only
1344 * when HT use has been marked.
1347 ieee80211_ht_node_cleanup(struct ieee80211_node *ni)
1349 struct ieee80211com *ic = ni->ni_ic;
1352 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
1357 KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT node"));
1359 /* XXX optimize this */
1360 for (i = 0; i < WME_NUM_TID; i++) {
1361 struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[i];
1362 if (tap->txa_flags & IEEE80211_AGGR_SETUP)
1365 for (i = 0; i < WME_NUM_TID; i++)
1366 ic->ic_ampdu_rx_stop(ni, &ni->ni_rx_ampdu[i]);
1369 ni->ni_flags &= ~IEEE80211_NODE_HT_ALL;
1373 * Age out HT resources for a station.
1376 ieee80211_ht_node_age(struct ieee80211_node *ni)
1378 struct ieee80211vap *vap = ni->ni_vap;
1381 KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT sta"));
1383 for (tid = 0; tid < WME_NUM_TID; tid++) {
1384 struct ieee80211_rx_ampdu *rap;
1386 rap = &ni->ni_rx_ampdu[tid];
1387 if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0)
1389 if (rap->rxa_qframes == 0)
1392 * Check for frames sitting too long in the reorder queue.
1393 * See above for more details on what's happening here.
1395 /* XXX honor batimeout? */
1396 if (ticks - rap->rxa_age > ieee80211_ampdu_age) {
1398 * Too long since we received the first
1399 * frame; flush the reorder buffer.
1401 vap->iv_stats.is_ampdu_rx_age += rap->rxa_qframes;
1402 ampdu_rx_flush(ni, rap);
1407 static struct ieee80211_channel *
1408 findhtchan(struct ieee80211com *ic, struct ieee80211_channel *c, int htflags)
1410 return ieee80211_find_channel(ic, c->ic_freq,
1411 (c->ic_flags &~ IEEE80211_CHAN_HT) | htflags);
1415 * Adjust a channel to be HT/non-HT according to the vap's configuration.
1417 struct ieee80211_channel *
1418 ieee80211_ht_adjust_channel(struct ieee80211com *ic,
1419 struct ieee80211_channel *chan, int flags)
1421 struct ieee80211_channel *c;
1423 if (flags & IEEE80211_FHT_HT) {
1424 /* promote to HT if possible */
1425 if (flags & IEEE80211_FHT_USEHT40) {
1426 if (!IEEE80211_IS_CHAN_HT40(chan)) {
1427 /* NB: arbitrarily pick ht40+ over ht40- */
1428 c = findhtchan(ic, chan, IEEE80211_CHAN_HT40U);
1430 c = findhtchan(ic, chan,
1431 IEEE80211_CHAN_HT40D);
1433 c = findhtchan(ic, chan,
1434 IEEE80211_CHAN_HT20);
1438 } else if (!IEEE80211_IS_CHAN_HT20(chan)) {
1439 c = findhtchan(ic, chan, IEEE80211_CHAN_HT20);
1443 } else if (IEEE80211_IS_CHAN_HT(chan)) {
1444 /* demote to legacy, HT use is disabled */
1445 c = ieee80211_find_channel(ic, chan->ic_freq,
1446 chan->ic_flags &~ IEEE80211_CHAN_HT);
1454 * Setup HT-specific state for a legacy WDS peer.
1457 ieee80211_ht_wds_init(struct ieee80211_node *ni)
1459 struct ieee80211vap *vap = ni->ni_vap;
1460 struct ieee80211_tx_ampdu *tap;
1463 KASSERT(vap->iv_flags_ht & IEEE80211_FHT_HT, ("no HT requested"));
1465 /* XXX check scan cache in case peer has an ap and we have info */
1467 * If setup with a legacy channel; locate an HT channel.
1468 * Otherwise if the inherited channel (from a companion
1469 * AP) is suitable use it so we use the same location
1470 * for the extension channel).
1472 ni->ni_chan = ieee80211_ht_adjust_channel(ni->ni_ic,
1473 ni->ni_chan, ieee80211_htchanflags(ni->ni_chan));
1476 if (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20)
1477 ni->ni_htcap |= IEEE80211_HTCAP_SHORTGI20;
1478 if (IEEE80211_IS_CHAN_HT40(ni->ni_chan)) {
1479 ni->ni_htcap |= IEEE80211_HTCAP_CHWIDTH40;
1481 if (IEEE80211_IS_CHAN_HT40U(ni->ni_chan))
1482 ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_ABOVE;
1483 else if (IEEE80211_IS_CHAN_HT40D(ni->ni_chan))
1484 ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_BELOW;
1485 if (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40)
1486 ni->ni_htcap |= IEEE80211_HTCAP_SHORTGI40;
1489 ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_NONE;
1491 ni->ni_htctlchan = ni->ni_chan->ic_ieee;
1492 if (vap->iv_flags_ht & IEEE80211_FHT_RIFS)
1493 ni->ni_flags |= IEEE80211_NODE_RIFS;
1494 /* XXX does it make sense to enable SMPS? */
1496 ni->ni_htopmode = 0; /* XXX need protection state */
1497 ni->ni_htstbc = 0; /* XXX need info */
1499 for (tid = 0; tid < WME_NUM_TID; tid++) {
1500 tap = &ni->ni_tx_ampdu[tid];
1502 ieee80211_txampdu_init_pps(tap);
1504 /* NB: AMPDU tx/rx governed by IEEE80211_FHT_AMPDU_{TX,RX} */
1505 ni->ni_flags |= IEEE80211_NODE_HT | IEEE80211_NODE_AMPDU |
1506 IEEE80211_NODE_AMSDU;
1510 * Notify a VAP of a change in the HTINFO ie if it's a hostap VAP.
1512 * This is to be called from the deferred HT protection update
1513 * task once the flags are updated.
1516 ieee80211_htinfo_notify(struct ieee80211vap *vap)
1519 IEEE80211_LOCK_ASSERT(vap->iv_ic);
1521 if (vap->iv_opmode != IEEE80211_M_HOSTAP)
1523 if (vap->iv_state != IEEE80211_S_RUN ||
1524 !IEEE80211_IS_CHAN_HT(vap->iv_bss->ni_chan))
1528 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N,
1530 "HT bss occupancy change: %d sta, %d ht, "
1531 "%d ht40%s, HT protmode now 0x%x"
1533 , vap->iv_ht_sta_assoc
1534 , vap->iv_ht40_sta_assoc
1535 , (vap->iv_flags_ht & IEEE80211_FHT_NONHT_PR) ?
1536 ", non-HT sta present" : ""
1537 , vap->iv_curhtprotmode);
1539 ieee80211_beacon_notify(vap, IEEE80211_BEACON_HTINFO);
1543 * Calculate HT protection mode from current
1544 * state and handle updates.
1547 htinfo_update(struct ieee80211vap *vap)
1549 struct ieee80211com *ic = vap->iv_ic;
1552 if (vap->iv_sta_assoc != vap->iv_ht_sta_assoc) {
1553 protmode = IEEE80211_HTINFO_OPMODE_MIXED
1554 | IEEE80211_HTINFO_NONHT_PRESENT;
1555 } else if (vap->iv_flags_ht & IEEE80211_FHT_NONHT_PR) {
1556 protmode = IEEE80211_HTINFO_OPMODE_PROTOPT
1557 | IEEE80211_HTINFO_NONHT_PRESENT;
1558 } else if (ic->ic_bsschan != IEEE80211_CHAN_ANYC &&
1559 IEEE80211_IS_CHAN_HT40(ic->ic_bsschan) &&
1560 vap->iv_sta_assoc != vap->iv_ht40_sta_assoc) {
1561 protmode = IEEE80211_HTINFO_OPMODE_HT20PR;
1563 protmode = IEEE80211_HTINFO_OPMODE_PURE;
1565 if (protmode != vap->iv_curhtprotmode) {
1566 vap->iv_curhtprotmode = protmode;
1567 /* Update VAP with new protection mode */
1568 ieee80211_vap_update_ht_protmode(vap);
1573 * Handle an HT station joining a BSS.
1576 ieee80211_ht_node_join(struct ieee80211_node *ni)
1578 struct ieee80211vap *vap = ni->ni_vap;
1580 IEEE80211_LOCK_ASSERT(vap->iv_ic);
1582 if (ni->ni_flags & IEEE80211_NODE_HT) {
1583 vap->iv_ht_sta_assoc++;
1584 if (ni->ni_chw == 40)
1585 vap->iv_ht40_sta_assoc++;
1591 * Handle an HT station leaving a BSS.
1594 ieee80211_ht_node_leave(struct ieee80211_node *ni)
1596 struct ieee80211vap *vap = ni->ni_vap;
1598 IEEE80211_LOCK_ASSERT(vap->iv_ic);
1600 if (ni->ni_flags & IEEE80211_NODE_HT) {
1601 vap->iv_ht_sta_assoc--;
1602 if (ni->ni_chw == 40)
1603 vap->iv_ht40_sta_assoc--;
1609 * Public version of htinfo_update; used for processing
1610 * beacon frames from overlapping bss.
1612 * Caller can specify either IEEE80211_HTINFO_OPMODE_MIXED
1613 * (on receipt of a beacon that advertises MIXED) or
1614 * IEEE80211_HTINFO_OPMODE_PROTOPT (on receipt of a beacon
1615 * from an overlapping legacy bss). We treat MIXED with
1616 * a higher precedence than PROTOPT (i.e. we will not change
1617 * change PROTOPT -> MIXED; only MIXED -> PROTOPT). This
1618 * corresponds to how we handle things in htinfo_update.
1622 ieee80211_htprot_update(struct ieee80211vap *vap, int protmode)
1624 struct ieee80211com *ic = vap->iv_ic;
1625 #define OPMODE(x) _IEEE80211_SHIFTMASK(x, IEEE80211_HTINFO_OPMODE)
1628 /* track non-HT station presence */
1629 KASSERT(protmode & IEEE80211_HTINFO_NONHT_PRESENT,
1630 ("protmode 0x%x", protmode));
1631 vap->iv_flags_ht |= IEEE80211_FHT_NONHT_PR;
1632 vap->iv_lastnonht = ticks;
1634 if (protmode != vap->iv_curhtprotmode &&
1635 (OPMODE(vap->iv_curhtprotmode) != IEEE80211_HTINFO_OPMODE_MIXED ||
1636 OPMODE(protmode) == IEEE80211_HTINFO_OPMODE_PROTOPT)) {
1637 vap->iv_curhtprotmode = protmode;
1638 /* Update VAP with new protection mode */
1639 ieee80211_vap_update_ht_protmode(vap);
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 ieee80211vap *vap)
1657 IEEE80211_LOCK_ASSERT(vap->iv_ic);
1659 if ((vap->iv_flags_ht & IEEE80211_FHT_NONHT_PR) &&
1660 ieee80211_time_after(ticks, vap->iv_lastnonht + IEEE80211_NONHT_PRESENT_AGE)) {
1661 IEEE80211_DPRINTF(vap, IEEE80211_MSG_11N,
1662 "%s", "time out non-HT STA present on channel");
1663 vap->iv_flags_ht &= ~IEEE80211_FHT_NONHT_PR;
1669 * Process an 802.11n HT capabilities ie.
1672 ieee80211_parse_htcap(struct ieee80211_node *ni, const uint8_t *ie)
1674 if (ie[0] == IEEE80211_ELEMID_VENDOR) {
1676 * Station used Vendor OUI ie to associate;
1677 * mark the node so when we respond we'll use
1678 * the Vendor OUI's and not the standard ie's.
1680 ni->ni_flags |= IEEE80211_NODE_HTCOMPAT;
1683 ni->ni_flags &= ~IEEE80211_NODE_HTCOMPAT;
1685 ni->ni_htcap = le16dec(ie +
1686 __offsetof(struct ieee80211_ie_htcap, hc_cap));
1687 ni->ni_htparam = ie[__offsetof(struct ieee80211_ie_htcap, hc_param)];
1691 htinfo_parse(struct ieee80211_node *ni,
1692 const struct ieee80211_ie_htinfo *htinfo)
1696 ni->ni_htctlchan = htinfo->hi_ctrlchannel;
1697 ni->ni_ht2ndchan = _IEEE80211_SHIFTMASK(htinfo->hi_byte1,
1698 IEEE80211_HTINFO_2NDCHAN);
1699 w = le16dec(&htinfo->hi_byte2);
1700 ni->ni_htopmode = _IEEE80211_SHIFTMASK(w, IEEE80211_HTINFO_OPMODE);
1701 w = le16dec(&htinfo->hi_byte45);
1702 ni->ni_htstbc = _IEEE80211_SHIFTMASK(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_vht_flags & 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 (_IEEE80211_MASKSHIFT(vap->iv_vht_cap.vht_cap_info,
1942 IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_MASK) >= 1) &&
1943 (vap->iv_vht_flags & 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 (_IEEE80211_MASKSHIFT(vap->iv_vht_cap.vht_cap_info,
1954 IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_MASK) == 2) &&
1955 (vap->iv_vht_flags & IEEE80211_FVHT_USEVHT80P80)) {
1956 vhtflags = IEEE80211_CHAN_VHT80P80;
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_vht_flags & 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_vht_flags & IEEE80211_FVHT_USEVHT40)) {
1983 vhtflags = IEEE80211_CHAN_VHT40U
1984 | IEEE80211_CHAN_HT40U;
1985 } else if (htflags == IEEE80211_CHAN_HT40D &&
1986 (vap->iv_vht_flags & 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 = _IEEE80211_MASKSHIFT(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 = _IEEE80211_MASKSHIFT(baparamset, IEEE80211_BAPS_BUFSIZ);
2359 /* XXX override our request? */
2360 tap->txa_wnd = (bufsiz == 0) ?
2361 IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX);
2363 tid = _IEEE80211_MASKSHIFT(baparamset, IEEE80211_BAPS_TID);
2365 tap->txa_flags |= IEEE80211_AGGR_RUNNING;
2366 tap->txa_attempts = 0;
2367 /* TODO: this should be a vap flag */
2368 if ((vap->iv_htcaps & IEEE80211_HTC_TX_AMSDU_AMPDU) &&
2369 (ni->ni_flags & IEEE80211_NODE_AMSDU_TX) &&
2370 (_IEEE80211_MASKSHIFT(baparamset, IEEE80211_BAPS_AMSDU)))
2371 tap->txa_flags |= IEEE80211_AGGR_AMSDU;
2373 tap->txa_flags &= ~IEEE80211_AGGR_AMSDU;
2375 /* mark tid so we don't try again */
2376 tap->txa_flags |= IEEE80211_AGGR_NAK;
2382 * Default method for stopping A-MPDU tx aggregation.
2383 * Any timer is cleared and we drain any pending frames.
2386 ieee80211_addba_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap)
2389 addba_stop_timeout(tap);
2390 if (tap->txa_flags & IEEE80211_AGGR_RUNNING) {
2391 /* XXX clear aggregation queue */
2392 tap->txa_flags &= ~(IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_AMSDU);
2394 tap->txa_attempts = 0;
2398 * Process a received action frame using the default aggregation
2399 * policy. We intercept ADDBA-related frames and use them to
2400 * update our aggregation state. All other frames are passed up
2401 * for processing by ieee80211_recv_action.
2404 ht_recv_action_ba_addba_request(struct ieee80211_node *ni,
2405 const struct ieee80211_frame *wh,
2406 const uint8_t *frm, const uint8_t *efrm)
2408 struct ieee80211com *ic = ni->ni_ic;
2409 struct ieee80211vap *vap = ni->ni_vap;
2410 struct ieee80211_rx_ampdu *rap;
2411 uint8_t dialogtoken;
2412 uint16_t baparamset, batimeout, baseqctl;
2416 dialogtoken = frm[2];
2417 baparamset = le16dec(frm+3);
2418 batimeout = le16dec(frm+5);
2419 baseqctl = le16dec(frm+7);
2421 tid = _IEEE80211_MASKSHIFT(baparamset, IEEE80211_BAPS_TID);
2423 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2424 "recv ADDBA request: dialogtoken %u baparamset 0x%x "
2425 "(tid %d bufsiz %d) batimeout %d baseqctl %d:%d amsdu %d",
2426 dialogtoken, baparamset,
2427 tid, _IEEE80211_MASKSHIFT(baparamset, IEEE80211_BAPS_BUFSIZ),
2429 _IEEE80211_MASKSHIFT(baseqctl, IEEE80211_BASEQ_START),
2430 _IEEE80211_MASKSHIFT(baseqctl, IEEE80211_BASEQ_FRAG),
2431 _IEEE80211_MASKSHIFT(baparamset, IEEE80211_BAPS_AMSDU));
2433 rap = &ni->ni_rx_ampdu[tid];
2435 /* Send ADDBA response */
2436 args[0] = dialogtoken;
2438 * NB: We ack only if the sta associated with HT and
2439 * the ap is configured to do AMPDU rx (the latter
2440 * violates the 11n spec and is mostly for testing).
2442 if ((ni->ni_flags & IEEE80211_NODE_AMPDU_RX) &&
2443 (vap->iv_flags_ht & IEEE80211_FHT_AMPDU_RX)) {
2444 /* XXX TODO: handle ampdu_rx_start failure */
2445 ic->ic_ampdu_rx_start(ni, rap,
2446 baparamset, batimeout, baseqctl);
2448 args[1] = IEEE80211_STATUS_SUCCESS;
2450 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
2451 ni, "reject ADDBA request: %s",
2452 ni->ni_flags & IEEE80211_NODE_AMPDU_RX ?
2453 "administratively disabled" :
2454 "not negotiated for station");
2455 vap->iv_stats.is_addba_reject++;
2456 args[1] = IEEE80211_STATUS_UNSPECIFIED;
2458 /* XXX honor rap flags? */
2459 args[2] = IEEE80211_BAPS_POLICY_IMMEDIATE
2460 | _IEEE80211_SHIFTMASK(tid, IEEE80211_BAPS_TID)
2461 | _IEEE80211_SHIFTMASK(rap->rxa_wnd, IEEE80211_BAPS_BUFSIZ)
2465 * TODO: we're out of iv_flags_ht fields; once
2466 * this is extended we should make this configurable.
2468 if ((baparamset & IEEE80211_BAPS_AMSDU) &&
2469 (ni->ni_flags & IEEE80211_NODE_AMSDU_RX) &&
2470 (vap->iv_htcaps & IEEE80211_HTC_RX_AMSDU_AMPDU))
2471 args[2] |= IEEE80211_BAPS_AMSDU;
2475 ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA,
2476 IEEE80211_ACTION_BA_ADDBA_RESPONSE, args);
2481 ht_recv_action_ba_addba_response(struct ieee80211_node *ni,
2482 const struct ieee80211_frame *wh,
2483 const uint8_t *frm, const uint8_t *efrm)
2485 struct ieee80211com *ic = ni->ni_ic;
2486 struct ieee80211vap *vap = ni->ni_vap;
2487 struct ieee80211_tx_ampdu *tap;
2488 uint8_t dialogtoken, policy;
2489 uint16_t baparamset, batimeout, code;
2491 #ifdef IEEE80211_DEBUG
2495 dialogtoken = frm[2];
2496 code = le16dec(frm+3);
2497 baparamset = le16dec(frm+5);
2498 tid = _IEEE80211_MASKSHIFT(baparamset, IEEE80211_BAPS_TID);
2499 #ifdef IEEE80211_DEBUG
2500 bufsiz = _IEEE80211_MASKSHIFT(baparamset, IEEE80211_BAPS_BUFSIZ);
2501 amsdu = !! _IEEE80211_MASKSHIFT(baparamset, IEEE80211_BAPS_AMSDU);
2503 policy = _IEEE80211_MASKSHIFT(baparamset, IEEE80211_BAPS_POLICY);
2504 batimeout = le16dec(frm+7);
2506 tap = &ni->ni_tx_ampdu[tid];
2507 if ((tap->txa_flags & IEEE80211_AGGR_XCHGPEND) == 0) {
2508 IEEE80211_DISCARD_MAC(vap,
2509 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
2510 ni->ni_macaddr, "ADDBA response",
2511 "no pending ADDBA, tid %d dialogtoken %u "
2512 "code %d", tid, dialogtoken, code);
2513 vap->iv_stats.is_addba_norequest++;
2516 if (dialogtoken != tap->txa_token) {
2517 IEEE80211_DISCARD_MAC(vap,
2518 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
2519 ni->ni_macaddr, "ADDBA response",
2520 "dialogtoken mismatch: waiting for %d, "
2521 "received %d, tid %d code %d",
2522 tap->txa_token, dialogtoken, tid, code);
2523 vap->iv_stats.is_addba_badtoken++;
2526 /* NB: assumes IEEE80211_AGGR_IMMEDIATE is 1 */
2527 if (policy != (tap->txa_flags & IEEE80211_AGGR_IMMEDIATE)) {
2528 IEEE80211_DISCARD_MAC(vap,
2529 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
2530 ni->ni_macaddr, "ADDBA response",
2531 "policy mismatch: expecting %s, "
2532 "received %s, tid %d code %d",
2533 tap->txa_flags & IEEE80211_AGGR_IMMEDIATE,
2535 vap->iv_stats.is_addba_badpolicy++;
2539 /* XXX we take MIN in ieee80211_addba_response */
2540 if (bufsiz > IEEE80211_AGGR_BAWMAX) {
2541 IEEE80211_DISCARD_MAC(vap,
2542 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
2543 ni->ni_macaddr, "ADDBA response",
2544 "BA window too large: max %d, "
2545 "received %d, tid %d code %d",
2546 bufsiz, IEEE80211_AGGR_BAWMAX, tid, code);
2547 vap->iv_stats.is_addba_badbawinsize++;
2552 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2553 "recv ADDBA response: dialogtoken %u code %d "
2554 "baparamset 0x%x (tid %d bufsiz %d amsdu %d) batimeout %d",
2555 dialogtoken, code, baparamset, tid,
2559 ic->ic_addba_response(ni, tap, code, baparamset, batimeout);
2564 ht_recv_action_ba_delba(struct ieee80211_node *ni,
2565 const struct ieee80211_frame *wh,
2566 const uint8_t *frm, const uint8_t *efrm)
2568 struct ieee80211com *ic = ni->ni_ic;
2569 struct ieee80211_rx_ampdu *rap;
2570 struct ieee80211_tx_ampdu *tap;
2571 uint16_t baparamset;
2572 #ifdef IEEE80211_DEBUG
2577 baparamset = le16dec(frm+2);
2578 #ifdef IEEE80211_DEBUG
2579 code = le16dec(frm+4);
2582 tid = _IEEE80211_MASKSHIFT(baparamset, IEEE80211_DELBAPS_TID);
2584 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2585 "recv DELBA: baparamset 0x%x (tid %d initiator %d) "
2586 "code %d", baparamset, tid,
2587 _IEEE80211_MASKSHIFT(baparamset, IEEE80211_DELBAPS_INIT), code);
2589 if ((baparamset & IEEE80211_DELBAPS_INIT) == 0) {
2590 tap = &ni->ni_tx_ampdu[tid];
2591 ic->ic_addba_stop(ni, tap);
2593 rap = &ni->ni_rx_ampdu[tid];
2594 ic->ic_ampdu_rx_stop(ni, rap);
2600 ht_recv_action_ht_txchwidth(struct ieee80211_node *ni,
2601 const struct ieee80211_frame *wh,
2602 const uint8_t *frm, const uint8_t *efrm)
2606 chw = (frm[2] == IEEE80211_A_HT_TXCHWIDTH_2040) ? 40 : 20;
2608 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2609 "%s: HT txchwidth, width %d%s",
2610 __func__, chw, ni->ni_chw != chw ? "*" : "");
2611 if (chw != ni->ni_chw) {
2612 /* XXX does this need to change the ht40 station count? */
2614 /* XXX notify on change */
2620 ht_recv_action_ht_mimopwrsave(struct ieee80211_node *ni,
2621 const struct ieee80211_frame *wh,
2622 const uint8_t *frm, const uint8_t *efrm)
2624 const struct ieee80211_action_ht_mimopowersave *mps =
2625 (const struct ieee80211_action_ht_mimopowersave *) frm;
2627 /* XXX check iv_htcaps */
2628 if (mps->am_control & IEEE80211_A_HT_MIMOPWRSAVE_ENA)
2629 ni->ni_flags |= IEEE80211_NODE_MIMO_PS;
2631 ni->ni_flags &= ~IEEE80211_NODE_MIMO_PS;
2632 if (mps->am_control & IEEE80211_A_HT_MIMOPWRSAVE_MODE)
2633 ni->ni_flags |= IEEE80211_NODE_MIMO_RTS;
2635 ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS;
2636 /* XXX notify on change */
2637 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2638 "%s: HT MIMO PS (%s%s)", __func__,
2639 (ni->ni_flags & IEEE80211_NODE_MIMO_PS) ? "on" : "off",
2640 (ni->ni_flags & IEEE80211_NODE_MIMO_RTS) ? "+rts" : ""
2646 * Transmit processing.
2650 * Check if A-MPDU should be requested/enabled for a stream.
2651 * We require a traffic rate above a per-AC threshold and we
2652 * also handle backoff from previous failed attempts.
2654 * Drivers may override this method to bring in information
2655 * such as link state conditions in making the decision.
2658 ieee80211_ampdu_enable(struct ieee80211_node *ni,
2659 struct ieee80211_tx_ampdu *tap)
2661 struct ieee80211vap *vap = ni->ni_vap;
2663 if (tap->txa_avgpps <
2664 vap->iv_ampdu_mintraffic[TID_TO_WME_AC(tap->txa_tid)])
2666 /* XXX check rssi? */
2667 if (tap->txa_attempts >= ieee80211_addba_maxtries &&
2668 ieee80211_time_after(ticks, tap->txa_nextrequest)) {
2670 * Don't retry too often; txa_nextrequest is set
2671 * to the minimum interval we'll retry after
2672 * ieee80211_addba_maxtries failed attempts are made.
2676 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni,
2677 "enable AMPDU on tid %d (%s), avgpps %d pkts %d attempt %d",
2678 tap->txa_tid, ieee80211_wme_acnames[TID_TO_WME_AC(tap->txa_tid)],
2679 tap->txa_avgpps, tap->txa_pkts, tap->txa_attempts);
2684 * Request A-MPDU tx aggregation. Setup local state and
2685 * issue an ADDBA request. BA use will only happen after
2686 * the other end replies with ADDBA response.
2689 ieee80211_ampdu_request(struct ieee80211_node *ni,
2690 struct ieee80211_tx_ampdu *tap)
2692 struct ieee80211com *ic = ni->ni_ic;
2694 int tid, dialogtoken;
2695 static int tokens = 0; /* XXX */
2698 if ((tap->txa_flags & IEEE80211_AGGR_SETUP) == 0) {
2699 /* do deferred setup of state */
2700 ampdu_tx_setup(tap);
2702 /* XXX hack for not doing proper locking */
2703 tap->txa_flags &= ~IEEE80211_AGGR_NAK;
2705 dialogtoken = (tokens+1) % 63; /* XXX */
2709 * XXX TODO: This is racy with any other parallel TX going on. :(
2711 tap->txa_start = ni->ni_txseqs[tid];
2713 args[0] = dialogtoken;
2714 args[1] = 0; /* NB: status code not used */
2715 args[2] = IEEE80211_BAPS_POLICY_IMMEDIATE
2716 | _IEEE80211_SHIFTMASK(tid, IEEE80211_BAPS_TID)
2717 | _IEEE80211_SHIFTMASK(IEEE80211_AGGR_BAWMAX,
2718 IEEE80211_BAPS_BUFSIZ)
2721 /* XXX TODO: this should be a flag, not iv_htcaps */
2722 if ((ni->ni_flags & IEEE80211_NODE_AMSDU_TX) &&
2723 (ni->ni_vap->iv_htcaps & IEEE80211_HTC_TX_AMSDU_AMPDU))
2724 args[2] |= IEEE80211_BAPS_AMSDU;
2726 args[3] = 0; /* batimeout */
2727 /* NB: do first so there's no race against reply */
2728 if (!ic->ic_addba_request(ni, tap, dialogtoken, args[2], args[3])) {
2729 /* unable to setup state, don't make request */
2730 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
2731 ni, "%s: could not setup BA stream for TID %d AC %d",
2732 __func__, tap->txa_tid, TID_TO_WME_AC(tap->txa_tid));
2733 /* defer next try so we don't slam the driver with requests */
2734 tap->txa_attempts = ieee80211_addba_maxtries;
2735 /* NB: check in case driver wants to override */
2736 if (tap->txa_nextrequest <= ticks)
2737 tap->txa_nextrequest = ticks + ieee80211_addba_backoff;
2740 tokens = dialogtoken; /* allocate token */
2741 /* NB: after calling ic_addba_request so driver can set txa_start */
2742 args[4] = _IEEE80211_SHIFTMASK(tap->txa_start, IEEE80211_BASEQ_START)
2743 | _IEEE80211_SHIFTMASK(0, IEEE80211_BASEQ_FRAG)
2745 return ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA,
2746 IEEE80211_ACTION_BA_ADDBA_REQUEST, args);
2750 * Terminate an AMPDU tx stream. State is reclaimed
2751 * and the peer notified with a DelBA Action frame.
2754 ieee80211_ampdu_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap,
2757 struct ieee80211com *ic = ni->ni_ic;
2758 struct ieee80211vap *vap = ni->ni_vap;
2762 tap->txa_flags &= ~IEEE80211_AGGR_BARPEND;
2763 if (IEEE80211_AMPDU_RUNNING(tap)) {
2764 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
2765 ni, "%s: stop BA stream for TID %d (reason: %d (%s))",
2766 __func__, tap->txa_tid, reason,
2767 ieee80211_reason_to_string(reason));
2768 vap->iv_stats.is_ampdu_stop++;
2770 ic->ic_addba_stop(ni, tap);
2771 args[0] = tap->txa_tid;
2772 args[1] = IEEE80211_DELBAPS_INIT;
2773 args[2] = reason; /* XXX reason code */
2774 ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA,
2775 IEEE80211_ACTION_BA_DELBA, args);
2777 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
2778 ni, "%s: BA stream for TID %d not running "
2779 "(reason: %d (%s))", __func__, tap->txa_tid, reason,
2780 ieee80211_reason_to_string(reason));
2781 vap->iv_stats.is_ampdu_stop_failed++;
2786 static void bar_start_timer(struct ieee80211_tx_ampdu *tap);
2789 bar_timeout(void *arg)
2791 struct ieee80211_tx_ampdu *tap = arg;
2792 struct ieee80211_node *ni = tap->txa_ni;
2794 KASSERT((tap->txa_flags & IEEE80211_AGGR_XCHGPEND) == 0,
2795 ("bar/addba collision, flags 0x%x", tap->txa_flags));
2797 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
2798 ni, "%s: tid %u flags 0x%x attempts %d", __func__,
2799 tap->txa_tid, tap->txa_flags, tap->txa_attempts);
2801 /* guard against race with bar_tx_complete */
2802 if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) == 0)
2805 if (tap->txa_attempts >= ieee80211_bar_maxtries) {
2806 struct ieee80211com *ic = ni->ni_ic;
2808 ni->ni_vap->iv_stats.is_ampdu_bar_tx_fail++;
2810 * If (at least) the last BAR TX timeout was due to
2811 * an ieee80211_send_bar() failures, then we need
2812 * to make sure we notify the driver that a BAR
2813 * TX did occur and fail. This gives the driver
2814 * a chance to undo any queue pause that may
2817 ic->ic_bar_response(ni, tap, 1);
2818 ieee80211_ampdu_stop(ni, tap, IEEE80211_REASON_TIMEOUT);
2820 ni->ni_vap->iv_stats.is_ampdu_bar_tx_retry++;
2821 if (ieee80211_send_bar(ni, tap, tap->txa_seqpending) != 0) {
2822 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
2823 ni, "%s: failed to TX, starting timer\n",
2826 * If ieee80211_send_bar() fails here, the
2827 * timer may have stopped and/or the pending
2828 * flag may be clear. Because of this,
2829 * fake the BARPEND and reset the timer.
2830 * A retransmission attempt will then occur
2831 * during the next timeout.
2834 tap->txa_flags |= IEEE80211_AGGR_BARPEND;
2835 bar_start_timer(tap);
2841 bar_start_timer(struct ieee80211_tx_ampdu *tap)
2843 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N,
2847 callout_reset(&tap->txa_timer, ieee80211_bar_timeout, bar_timeout, tap);
2851 bar_stop_timer(struct ieee80211_tx_ampdu *tap)
2853 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N,
2857 callout_stop(&tap->txa_timer);
2861 bar_tx_complete(struct ieee80211_node *ni, void *arg, int status)
2863 struct ieee80211_tx_ampdu *tap = arg;
2865 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
2866 ni, "%s: tid %u flags 0x%x pending %d status %d",
2867 __func__, tap->txa_tid, tap->txa_flags,
2868 callout_pending(&tap->txa_timer), status);
2870 ni->ni_vap->iv_stats.is_ampdu_bar_tx++;
2872 if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) &&
2873 callout_pending(&tap->txa_timer)) {
2874 struct ieee80211com *ic = ni->ni_ic;
2876 if (status == 0) /* ACK'd */
2877 bar_stop_timer(tap);
2878 ic->ic_bar_response(ni, tap, status);
2879 /* NB: just let timer expire so we pace requests */
2884 ieee80211_bar_response(struct ieee80211_node *ni,
2885 struct ieee80211_tx_ampdu *tap, int status)
2888 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N,
2892 if (status == 0) { /* got ACK */
2893 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
2894 ni, "BAR moves BA win <%u:%u> (%u frames) txseq %u tid %u",
2896 IEEE80211_SEQ_ADD(tap->txa_start, tap->txa_wnd-1),
2897 tap->txa_qframes, tap->txa_seqpending,
2900 /* NB: timer already stopped in bar_tx_complete */
2901 tap->txa_start = tap->txa_seqpending;
2902 tap->txa_flags &= ~IEEE80211_AGGR_BARPEND;
2907 * Transmit a BAR frame to the specified node. The
2908 * BAR contents are drawn from the supplied aggregation
2909 * state associated with the node.
2911 * NB: we only handle immediate ACK w/ compressed bitmap.
2914 ieee80211_send_bar(struct ieee80211_node *ni,
2915 struct ieee80211_tx_ampdu *tap, ieee80211_seq seq)
2917 #define senderr(_x, _v) do { vap->iv_stats._v++; ret = _x; goto bad; } while (0)
2918 struct ieee80211vap *vap = ni->ni_vap;
2919 struct ieee80211com *ic = ni->ni_ic;
2920 struct ieee80211_frame_bar *bar;
2922 uint16_t barctl, barseqctl;
2926 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N,
2931 if ((tap->txa_flags & IEEE80211_AGGR_RUNNING) == 0) {
2932 /* no ADDBA response, should not happen */
2937 bar_stop_timer(tap);
2939 ieee80211_ref_node(ni);
2941 m = ieee80211_getmgtframe(&frm, ic->ic_headroom, sizeof(*bar));
2943 senderr(ENOMEM, is_tx_nobuf);
2945 if (!ieee80211_add_callback(m, bar_tx_complete, tap)) {
2947 senderr(ENOMEM, is_tx_nobuf); /* XXX */
2951 bar = mtod(m, struct ieee80211_frame_bar *);
2952 bar->i_fc[0] = IEEE80211_FC0_VERSION_0 |
2953 IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_BAR;
2955 IEEE80211_ADDR_COPY(bar->i_ra, ni->ni_macaddr);
2956 IEEE80211_ADDR_COPY(bar->i_ta, vap->iv_myaddr);
2959 barctl = (tap->txa_flags & IEEE80211_AGGR_IMMEDIATE ?
2960 0 : IEEE80211_BAR_NOACK)
2961 | IEEE80211_BAR_COMP
2962 | _IEEE80211_SHIFTMASK(tid, IEEE80211_BAR_TID)
2964 barseqctl = _IEEE80211_SHIFTMASK(seq, IEEE80211_BAR_SEQ_START);
2965 /* NB: known to have proper alignment */
2966 bar->i_ctl = htole16(barctl);
2967 bar->i_seq = htole16(barseqctl);
2968 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_bar);
2970 M_WME_SETAC(m, WME_AC_VO);
2972 IEEE80211_NODE_STAT(ni, tx_mgmt); /* XXX tx_ctl? */
2975 /* init/bump attempts counter */
2976 if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) == 0)
2977 tap->txa_attempts = 1;
2979 tap->txa_attempts++;
2980 tap->txa_seqpending = seq;
2981 tap->txa_flags |= IEEE80211_AGGR_BARPEND;
2983 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_11N,
2984 ni, "send BAR: tid %u ctl 0x%x start %u (attempt %d)",
2985 tid, barctl, seq, tap->txa_attempts);
2988 * ic_raw_xmit will free the node reference
2989 * regardless of queue/TX success or failure.
2991 IEEE80211_TX_LOCK(ic);
2992 ret = ieee80211_raw_output(vap, ni, m, NULL);
2993 IEEE80211_TX_UNLOCK(ic);
2995 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_11N,
2996 ni, "send BAR: failed: (ret = %d)\n",
2998 /* xmit failed, clear state flag */
2999 tap->txa_flags &= ~IEEE80211_AGGR_BARPEND;
3000 vap->iv_stats.is_ampdu_bar_tx_fail++;
3003 /* XXX hack against tx complete happening before timer is started */
3004 if (tap->txa_flags & IEEE80211_AGGR_BARPEND)
3005 bar_start_timer(tap);
3008 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N,
3012 vap->iv_stats.is_ampdu_bar_tx_fail++;
3013 ieee80211_free_node(ni);
3019 ht_action_output(struct ieee80211_node *ni, struct mbuf *m)
3021 struct ieee80211_bpf_params params;
3023 memset(¶ms, 0, sizeof(params));
3024 params.ibp_pri = WME_AC_VO;
3025 params.ibp_rate0 = ni->ni_txparms->mgmtrate;
3026 /* NB: we know all frames are unicast */
3027 params.ibp_try0 = ni->ni_txparms->maxretry;
3028 params.ibp_power = ni->ni_txpower;
3029 return ieee80211_mgmt_output(ni, m, IEEE80211_FC0_SUBTYPE_ACTION,
3033 #define ADDSHORT(frm, v) do { \
3034 frm[0] = (v) & 0xff; \
3035 frm[1] = (v) >> 8; \
3040 * Send an action management frame. The arguments are stuff
3041 * into a frame without inspection; the caller is assumed to
3042 * prepare them carefully (e.g. based on the aggregation state).
3045 ht_send_action_ba_addba(struct ieee80211_node *ni,
3046 int category, int action, void *arg0)
3048 struct ieee80211vap *vap = ni->ni_vap;
3049 struct ieee80211com *ic = ni->ni_ic;
3050 uint16_t *args = arg0;
3054 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
3055 "send ADDBA %s: dialogtoken %d status %d "
3056 "baparamset 0x%x (tid %d amsdu %d) batimeout 0x%x baseqctl 0x%x",
3057 (action == IEEE80211_ACTION_BA_ADDBA_REQUEST) ?
3058 "request" : "response", args[0], args[1], args[2],
3059 _IEEE80211_MASKSHIFT(args[2], IEEE80211_BAPS_TID),
3060 _IEEE80211_MASKSHIFT(args[2], IEEE80211_BAPS_AMSDU),
3063 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
3064 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
3065 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
3066 ieee80211_ref_node(ni);
3068 m = ieee80211_getmgtframe(&frm,
3069 ic->ic_headroom + sizeof(struct ieee80211_frame),
3070 sizeof(uint16_t) /* action+category */
3071 /* XXX may action payload */
3072 + sizeof(struct ieee80211_action_ba_addbaresponse)
3077 *frm++ = args[0]; /* dialog token */
3078 if (action == IEEE80211_ACTION_BA_ADDBA_RESPONSE)
3079 ADDSHORT(frm, args[1]); /* status code */
3080 ADDSHORT(frm, args[2]); /* baparamset */
3081 ADDSHORT(frm, args[3]); /* batimeout */
3082 if (action == IEEE80211_ACTION_BA_ADDBA_REQUEST)
3083 ADDSHORT(frm, args[4]); /* baseqctl */
3084 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
3085 return ht_action_output(ni, m);
3087 vap->iv_stats.is_tx_nobuf++;
3088 ieee80211_free_node(ni);
3094 ht_send_action_ba_delba(struct ieee80211_node *ni,
3095 int category, int action, void *arg0)
3097 struct ieee80211vap *vap = ni->ni_vap;
3098 struct ieee80211com *ic = ni->ni_ic;
3099 uint16_t *args = arg0;
3101 uint16_t baparamset;
3104 baparamset = _IEEE80211_SHIFTMASK(args[0], IEEE80211_DELBAPS_TID)
3107 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
3108 "send DELBA action: tid %d, initiator %d reason %d (%s)",
3109 args[0], args[1], args[2], ieee80211_reason_to_string(args[2]));
3111 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
3112 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
3113 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
3114 ieee80211_ref_node(ni);
3116 m = ieee80211_getmgtframe(&frm,
3117 ic->ic_headroom + sizeof(struct ieee80211_frame),
3118 sizeof(uint16_t) /* action+category */
3119 /* XXX may action payload */
3120 + sizeof(struct ieee80211_action_ba_addbaresponse)
3125 ADDSHORT(frm, baparamset);
3126 ADDSHORT(frm, args[2]); /* reason code */
3127 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
3128 return ht_action_output(ni, m);
3130 vap->iv_stats.is_tx_nobuf++;
3131 ieee80211_free_node(ni);
3137 ht_send_action_ht_txchwidth(struct ieee80211_node *ni,
3138 int category, int action, void *arg0)
3140 struct ieee80211vap *vap = ni->ni_vap;
3141 struct ieee80211com *ic = ni->ni_ic;
3145 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
3146 "send HT txchwidth: width %d",
3147 IEEE80211_IS_CHAN_HT40(ni->ni_chan) ? 40 : 20);
3149 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
3150 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
3151 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
3152 ieee80211_ref_node(ni);
3154 m = ieee80211_getmgtframe(&frm,
3155 ic->ic_headroom + sizeof(struct ieee80211_frame),
3156 sizeof(uint16_t) /* action+category */
3157 /* XXX may action payload */
3158 + sizeof(struct ieee80211_action_ba_addbaresponse)
3163 *frm++ = IEEE80211_IS_CHAN_HT40(ni->ni_chan) ?
3164 IEEE80211_A_HT_TXCHWIDTH_2040 :
3165 IEEE80211_A_HT_TXCHWIDTH_20;
3166 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
3167 return ht_action_output(ni, m);
3169 vap->iv_stats.is_tx_nobuf++;
3170 ieee80211_free_node(ni);
3177 * Construct the MCS bit mask for inclusion in an HT capabilities
3178 * information element.
3181 ieee80211_set_mcsset(struct ieee80211com *ic, uint8_t *frm)
3186 KASSERT((ic->ic_rxstream > 0 && ic->ic_rxstream <= 4),
3187 ("ic_rxstream %d out of range", ic->ic_rxstream));
3188 KASSERT((ic->ic_txstream > 0 && ic->ic_txstream <= 4),
3189 ("ic_txstream %d out of range", ic->ic_txstream));
3191 for (i = 0; i < ic->ic_rxstream * 8; i++)
3193 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) &&
3194 (ic->ic_htcaps & IEEE80211_HTC_RXMCS32))
3196 if (ic->ic_htcaps & IEEE80211_HTC_RXUNEQUAL) {
3197 if (ic->ic_rxstream >= 2) {
3198 for (i = 33; i <= 38; i++)
3201 if (ic->ic_rxstream >= 3) {
3202 for (i = 39; i <= 52; i++)
3205 if (ic->ic_rxstream >= 4) {
3206 for (i = 53; i <= 76; i++)
3211 txparams = 0x1; /* TX MCS set defined */
3212 if (ic->ic_rxstream != ic->ic_txstream) {
3213 txparams |= 0x2; /* TX RX MCS not equal */
3214 txparams |= (ic->ic_txstream - 1) << 2; /* num TX streams */
3215 if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL)
3216 txparams |= 0x16; /* TX unequal modulation sup */
3223 * Add body of an HTCAP information element.
3226 ieee80211_add_htcap_body(uint8_t *frm, struct ieee80211_node *ni)
3228 #define ADDSHORT(frm, v) do { \
3229 frm[0] = (v) & 0xff; \
3230 frm[1] = (v) >> 8; \
3233 struct ieee80211com *ic = ni->ni_ic;
3234 struct ieee80211vap *vap = ni->ni_vap;
3235 uint16_t caps, extcaps;
3238 /* HT capabilities */
3239 caps = vap->iv_htcaps & 0xffff;
3241 * Note channel width depends on whether we are operating as
3242 * a sta or not. When operating as a sta we are generating
3243 * a request based on our desired configuration. Otherwise
3244 * we are operational and the channel attributes identify
3245 * how we've been setup (which might be different if a fixed
3246 * channel is specified).
3248 if (vap->iv_opmode == IEEE80211_M_STA) {
3249 /* override 20/40 use based on config */
3250 if (vap->iv_flags_ht & IEEE80211_FHT_USEHT40)
3251 caps |= IEEE80211_HTCAP_CHWIDTH40;
3253 caps &= ~IEEE80211_HTCAP_CHWIDTH40;
3255 /* Start by using the advertised settings */
3256 rxmax = _IEEE80211_MASKSHIFT(ni->ni_htparam,
3257 IEEE80211_HTCAP_MAXRXAMPDU);
3258 density = _IEEE80211_MASKSHIFT(ni->ni_htparam,
3259 IEEE80211_HTCAP_MPDUDENSITY);
3261 IEEE80211_DPRINTF(vap, IEEE80211_MSG_11N,
3262 "%s: advertised rxmax=%d, density=%d, vap rxmax=%d, density=%d\n",
3266 vap->iv_ampdu_rxmax,
3267 vap->iv_ampdu_density);
3269 /* Cap at VAP rxmax */
3270 if (rxmax > vap->iv_ampdu_rxmax)
3271 rxmax = vap->iv_ampdu_rxmax;
3274 * If the VAP ampdu density value greater, use that.
3276 * (Larger density value == larger minimum gap between A-MPDU
3279 if (vap->iv_ampdu_density > density)
3280 density = vap->iv_ampdu_density;
3283 * NB: Hardware might support HT40 on some but not all
3284 * channels. We can't determine this earlier because only
3285 * after association the channel is upgraded to HT based
3286 * on the negotiated capabilities.
3288 if (ni->ni_chan != IEEE80211_CHAN_ANYC &&
3289 findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT40U) == NULL &&
3290 findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT40D) == NULL)
3291 caps &= ~IEEE80211_HTCAP_CHWIDTH40;
3293 /* override 20/40 use based on current channel */
3294 if (IEEE80211_IS_CHAN_HT40(ni->ni_chan))
3295 caps |= IEEE80211_HTCAP_CHWIDTH40;
3297 caps &= ~IEEE80211_HTCAP_CHWIDTH40;
3299 /* XXX TODO should it start by using advertised settings? */
3300 rxmax = vap->iv_ampdu_rxmax;
3301 density = vap->iv_ampdu_density;
3304 /* adjust short GI based on channel and config */
3305 if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20) == 0)
3306 caps &= ~IEEE80211_HTCAP_SHORTGI20;
3307 if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40) == 0 ||
3308 (caps & IEEE80211_HTCAP_CHWIDTH40) == 0)
3309 caps &= ~IEEE80211_HTCAP_SHORTGI40;
3311 /* adjust STBC based on receive capabilities */
3312 if ((vap->iv_flags_ht & IEEE80211_FHT_STBC_RX) == 0)
3313 caps &= ~IEEE80211_HTCAP_RXSTBC;
3315 /* adjust LDPC based on receive capabilites */
3316 if ((vap->iv_flags_ht & IEEE80211_FHT_LDPC_RX) == 0)
3317 caps &= ~IEEE80211_HTCAP_LDPC;
3319 ADDSHORT(frm, caps);
3322 *frm = _IEEE80211_SHIFTMASK(rxmax, IEEE80211_HTCAP_MAXRXAMPDU)
3323 | _IEEE80211_SHIFTMASK(density, IEEE80211_HTCAP_MPDUDENSITY)
3327 /* pre-zero remainder of ie */
3328 memset(frm, 0, sizeof(struct ieee80211_ie_htcap) -
3329 __offsetof(struct ieee80211_ie_htcap, hc_mcsset));
3331 /* supported MCS set */
3333 * XXX: For sta mode the rate set should be restricted based
3334 * on the AP's capabilities, but ni_htrates isn't setup when
3335 * we're called to form an AssocReq frame so for now we're
3336 * restricted to the device capabilities.
3338 ieee80211_set_mcsset(ni->ni_ic, frm);
3340 frm += __offsetof(struct ieee80211_ie_htcap, hc_extcap) -
3341 __offsetof(struct ieee80211_ie_htcap, hc_mcsset);
3343 /* HT extended capabilities */
3344 extcaps = vap->iv_htextcaps & 0xffff;
3346 ADDSHORT(frm, extcaps);
3348 frm += sizeof(struct ieee80211_ie_htcap) -
3349 __offsetof(struct ieee80211_ie_htcap, hc_txbf);
3356 * Add 802.11n HT capabilities information element
3359 ieee80211_add_htcap(uint8_t *frm, struct ieee80211_node *ni)
3361 frm[0] = IEEE80211_ELEMID_HTCAP;
3362 frm[1] = sizeof(struct ieee80211_ie_htcap) - 2;
3363 return ieee80211_add_htcap_body(frm + 2, ni);
3367 * Non-associated probe request - add HT capabilities based on
3368 * the current channel configuration.
3371 ieee80211_add_htcap_body_ch(uint8_t *frm, struct ieee80211vap *vap,
3372 struct ieee80211_channel *c)
3374 #define ADDSHORT(frm, v) do { \
3375 frm[0] = (v) & 0xff; \
3376 frm[1] = (v) >> 8; \
3379 struct ieee80211com *ic = vap->iv_ic;
3380 uint16_t caps, extcaps;
3383 /* HT capabilities */
3384 caps = vap->iv_htcaps & 0xffff;
3387 * We don't use this in STA mode; only in IBSS mode.
3388 * So in IBSS mode we base our HTCAP flags on the
3392 /* override 20/40 use based on current channel */
3393 if (IEEE80211_IS_CHAN_HT40(c))
3394 caps |= IEEE80211_HTCAP_CHWIDTH40;
3396 caps &= ~IEEE80211_HTCAP_CHWIDTH40;
3398 /* Use the currently configured values */
3399 rxmax = vap->iv_ampdu_rxmax;
3400 density = vap->iv_ampdu_density;
3402 /* adjust short GI based on channel and config */
3403 if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20) == 0)
3404 caps &= ~IEEE80211_HTCAP_SHORTGI20;
3405 if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40) == 0 ||
3406 (caps & IEEE80211_HTCAP_CHWIDTH40) == 0)
3407 caps &= ~IEEE80211_HTCAP_SHORTGI40;
3408 ADDSHORT(frm, caps);
3411 *frm = _IEEE80211_SHIFTMASK(rxmax, IEEE80211_HTCAP_MAXRXAMPDU)
3412 | _IEEE80211_SHIFTMASK(density, IEEE80211_HTCAP_MPDUDENSITY)
3416 /* pre-zero remainder of ie */
3417 memset(frm, 0, sizeof(struct ieee80211_ie_htcap) -
3418 __offsetof(struct ieee80211_ie_htcap, hc_mcsset));
3420 /* supported MCS set */
3422 * XXX: For sta mode the rate set should be restricted based
3423 * on the AP's capabilities, but ni_htrates isn't setup when
3424 * we're called to form an AssocReq frame so for now we're
3425 * restricted to the device capabilities.
3427 ieee80211_set_mcsset(ic, frm);
3429 frm += __offsetof(struct ieee80211_ie_htcap, hc_extcap) -
3430 __offsetof(struct ieee80211_ie_htcap, hc_mcsset);
3432 /* HT extended capabilities */
3433 extcaps = vap->iv_htextcaps & 0xffff;
3435 ADDSHORT(frm, extcaps);
3437 frm += sizeof(struct ieee80211_ie_htcap) -
3438 __offsetof(struct ieee80211_ie_htcap, hc_txbf);
3445 * Add 802.11n HT capabilities information element
3448 ieee80211_add_htcap_ch(uint8_t *frm, struct ieee80211vap *vap,
3449 struct ieee80211_channel *c)
3451 frm[0] = IEEE80211_ELEMID_HTCAP;
3452 frm[1] = sizeof(struct ieee80211_ie_htcap) - 2;
3453 return ieee80211_add_htcap_body_ch(frm + 2, vap, c);
3457 * Add Broadcom OUI wrapped standard HTCAP ie; this is
3458 * used for compatibility w/ pre-draft implementations.
3461 ieee80211_add_htcap_vendor(uint8_t *frm, struct ieee80211_node *ni)
3463 frm[0] = IEEE80211_ELEMID_VENDOR;
3464 frm[1] = 4 + sizeof(struct ieee80211_ie_htcap) - 2;
3465 frm[2] = (BCM_OUI >> 0) & 0xff;
3466 frm[3] = (BCM_OUI >> 8) & 0xff;
3467 frm[4] = (BCM_OUI >> 16) & 0xff;
3468 frm[5] = BCM_OUI_HTCAP;
3469 return ieee80211_add_htcap_body(frm + 6, ni);
3473 * Construct the MCS bit mask of basic rates
3474 * for inclusion in an HT information element.
3477 ieee80211_set_basic_htrates(uint8_t *frm, const struct ieee80211_htrateset *rs)
3481 for (i = 0; i < rs->rs_nrates; i++) {
3482 int r = rs->rs_rates[i] & IEEE80211_RATE_VAL;
3483 if ((rs->rs_rates[i] & IEEE80211_RATE_BASIC) &&
3484 r < IEEE80211_HTRATE_MAXSIZE) {
3485 /* NB: this assumes a particular implementation */
3492 * Update the HTINFO ie for a beacon frame.
3495 ieee80211_ht_update_beacon(struct ieee80211vap *vap,
3496 struct ieee80211_beacon_offsets *bo)
3498 #define PROTMODE (IEEE80211_HTINFO_OPMODE|IEEE80211_HTINFO_NONHT_PRESENT)
3499 struct ieee80211_node *ni;
3500 const struct ieee80211_channel *bsschan;
3501 struct ieee80211com *ic = vap->iv_ic;
3502 struct ieee80211_ie_htinfo *ht =
3503 (struct ieee80211_ie_htinfo *) bo->bo_htinfo;
3505 ni = ieee80211_ref_node(vap->iv_bss);
3506 bsschan = ni->ni_chan;
3508 /* XXX only update on channel change */
3509 ht->hi_ctrlchannel = ieee80211_chan2ieee(ic, bsschan);
3510 if (vap->iv_flags_ht & IEEE80211_FHT_RIFS)
3511 ht->hi_byte1 = IEEE80211_HTINFO_RIFSMODE_PERM;
3513 ht->hi_byte1 = IEEE80211_HTINFO_RIFSMODE_PROH;
3514 if (IEEE80211_IS_CHAN_HT40U(bsschan))
3515 ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_ABOVE;
3516 else if (IEEE80211_IS_CHAN_HT40D(bsschan))
3517 ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_BELOW;
3519 ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_NONE;
3520 if (IEEE80211_IS_CHAN_HT40(bsschan))
3521 ht->hi_byte1 |= IEEE80211_HTINFO_TXWIDTH_2040;
3523 /* protection mode */
3525 * XXX TODO: this uses the global flag, not the per-VAP flag.
3526 * Eventually (once the protection modes are done per-channel
3527 * rather than per-VAP) we can flip this over to be per-VAP but
3528 * using the channel protection mode.
3530 ht->hi_byte2 = (ht->hi_byte2 &~ PROTMODE) | ic->ic_curhtprotmode;
3532 ieee80211_free_node(ni);
3534 /* XXX propagate to vendor ie's */
3539 * Add body of an HTINFO information element.
3541 * NB: We don't use struct ieee80211_ie_htinfo because we can
3542 * be called to fillin both a standard ie and a compat ie that
3543 * has a vendor OUI at the front.
3546 ieee80211_add_htinfo_body(uint8_t *frm, struct ieee80211_node *ni)
3548 struct ieee80211vap *vap = ni->ni_vap;
3549 struct ieee80211com *ic = ni->ni_ic;
3551 /* pre-zero remainder of ie */
3552 memset(frm, 0, sizeof(struct ieee80211_ie_htinfo) - 2);
3554 /* primary/control channel center */
3555 *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan);
3557 if (vap->iv_flags_ht & IEEE80211_FHT_RIFS)
3558 frm[0] = IEEE80211_HTINFO_RIFSMODE_PERM;
3560 frm[0] = IEEE80211_HTINFO_RIFSMODE_PROH;
3561 if (IEEE80211_IS_CHAN_HT40U(ni->ni_chan))
3562 frm[0] |= IEEE80211_HTINFO_2NDCHAN_ABOVE;
3563 else if (IEEE80211_IS_CHAN_HT40D(ni->ni_chan))
3564 frm[0] |= IEEE80211_HTINFO_2NDCHAN_BELOW;
3566 frm[0] |= IEEE80211_HTINFO_2NDCHAN_NONE;
3567 if (IEEE80211_IS_CHAN_HT40(ni->ni_chan))
3568 frm[0] |= IEEE80211_HTINFO_TXWIDTH_2040;
3571 * Add current protection mode. Unlike for beacons,
3572 * this will respect the per-VAP flags.
3574 frm[1] = vap->iv_curhtprotmode;
3579 ieee80211_set_basic_htrates(frm, &ni->ni_htrates);
3580 frm += sizeof(struct ieee80211_ie_htinfo) -
3581 __offsetof(struct ieee80211_ie_htinfo, hi_basicmcsset);
3586 * Add 802.11n HT information element.
3589 ieee80211_add_htinfo(uint8_t *frm, struct ieee80211_node *ni)
3591 frm[0] = IEEE80211_ELEMID_HTINFO;
3592 frm[1] = sizeof(struct ieee80211_ie_htinfo) - 2;
3593 return ieee80211_add_htinfo_body(frm + 2, ni);
3597 * Add Broadcom OUI wrapped standard HTINFO ie; this is
3598 * used for compatibility w/ pre-draft implementations.
3601 ieee80211_add_htinfo_vendor(uint8_t *frm, struct ieee80211_node *ni)
3603 frm[0] = IEEE80211_ELEMID_VENDOR;
3604 frm[1] = 4 + sizeof(struct ieee80211_ie_htinfo) - 2;
3605 frm[2] = (BCM_OUI >> 0) & 0xff;
3606 frm[3] = (BCM_OUI >> 8) & 0xff;
3607 frm[4] = (BCM_OUI >> 16) & 0xff;
3608 frm[5] = BCM_OUI_HTINFO;
3609 return ieee80211_add_htinfo_body(frm + 6, ni);