2 * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
32 * IEEE 802.11n protocol support.
38 #include <sys/param.h>
39 #include <sys/kernel.h>
40 #include <sys/systm.h>
41 #include <sys/endian.h>
43 #include <sys/socket.h>
46 #include <net/if_media.h>
47 #include <net/ethernet.h>
49 #include <net80211/ieee80211_var.h>
50 #include <net80211/ieee80211_action.h>
51 #include <net80211/ieee80211_input.h>
53 /* define here, used throughout file */
54 #define MS(_v, _f) (((_v) & _f) >> _f##_S)
55 #define SM(_v, _f) (((_v) << _f##_S) & _f)
57 const struct ieee80211_mcs_rates ieee80211_htrates[IEEE80211_HTRATE_MAXSIZE] = {
58 { 13, 14, 27, 30 }, /* MCS 0 */
59 { 26, 29, 54, 60 }, /* MCS 1 */
60 { 39, 43, 81, 90 }, /* MCS 2 */
61 { 52, 58, 108, 120 }, /* MCS 3 */
62 { 78, 87, 162, 180 }, /* MCS 4 */
63 { 104, 116, 216, 240 }, /* MCS 5 */
64 { 117, 130, 243, 270 }, /* MCS 6 */
65 { 130, 144, 270, 300 }, /* MCS 7 */
66 { 26, 29, 54, 60 }, /* MCS 8 */
67 { 52, 58, 108, 120 }, /* MCS 9 */
68 { 78, 87, 162, 180 }, /* MCS 10 */
69 { 104, 116, 216, 240 }, /* MCS 11 */
70 { 156, 173, 324, 360 }, /* MCS 12 */
71 { 208, 231, 432, 480 }, /* MCS 13 */
72 { 234, 260, 486, 540 }, /* MCS 14 */
73 { 260, 289, 540, 600 }, /* MCS 15 */
74 { 39, 43, 81, 90 }, /* MCS 16 */
75 { 78, 87, 162, 180 }, /* MCS 17 */
76 { 117, 130, 243, 270 }, /* MCS 18 */
77 { 156, 173, 324, 360 }, /* MCS 19 */
78 { 234, 260, 486, 540 }, /* MCS 20 */
79 { 312, 347, 648, 720 }, /* MCS 21 */
80 { 351, 390, 729, 810 }, /* MCS 22 */
81 { 390, 433, 810, 900 }, /* MCS 23 */
82 { 52, 58, 108, 120 }, /* MCS 24 */
83 { 104, 116, 216, 240 }, /* MCS 25 */
84 { 156, 173, 324, 360 }, /* MCS 26 */
85 { 208, 231, 432, 480 }, /* MCS 27 */
86 { 312, 347, 648, 720 }, /* MCS 28 */
87 { 416, 462, 864, 960 }, /* MCS 29 */
88 { 468, 520, 972, 1080 }, /* MCS 30 */
89 { 520, 578, 1080, 1200 }, /* MCS 31 */
90 { 0, 0, 12, 13 }, /* MCS 32 */
91 { 78, 87, 162, 180 }, /* MCS 33 */
92 { 104, 116, 216, 240 }, /* MCS 34 */
93 { 130, 144, 270, 300 }, /* MCS 35 */
94 { 117, 130, 243, 270 }, /* MCS 36 */
95 { 156, 173, 324, 360 }, /* MCS 37 */
96 { 195, 217, 405, 450 }, /* MCS 38 */
97 { 104, 116, 216, 240 }, /* MCS 39 */
98 { 130, 144, 270, 300 }, /* MCS 40 */
99 { 130, 144, 270, 300 }, /* MCS 41 */
100 { 156, 173, 324, 360 }, /* MCS 42 */
101 { 182, 202, 378, 420 }, /* MCS 43 */
102 { 182, 202, 378, 420 }, /* MCS 44 */
103 { 208, 231, 432, 480 }, /* MCS 45 */
104 { 156, 173, 324, 360 }, /* MCS 46 */
105 { 195, 217, 405, 450 }, /* MCS 47 */
106 { 195, 217, 405, 450 }, /* MCS 48 */
107 { 234, 260, 486, 540 }, /* MCS 49 */
108 { 273, 303, 567, 630 }, /* MCS 50 */
109 { 273, 303, 567, 630 }, /* MCS 51 */
110 { 312, 347, 648, 720 }, /* MCS 52 */
111 { 130, 144, 270, 300 }, /* MCS 53 */
112 { 156, 173, 324, 360 }, /* MCS 54 */
113 { 182, 202, 378, 420 }, /* MCS 55 */
114 { 156, 173, 324, 360 }, /* MCS 56 */
115 { 182, 202, 378, 420 }, /* MCS 57 */
116 { 208, 231, 432, 480 }, /* MCS 58 */
117 { 234, 260, 486, 540 }, /* MCS 59 */
118 { 208, 231, 432, 480 }, /* MCS 60 */
119 { 234, 260, 486, 540 }, /* MCS 61 */
120 { 260, 289, 540, 600 }, /* MCS 62 */
121 { 260, 289, 540, 600 }, /* MCS 63 */
122 { 286, 318, 594, 660 }, /* MCS 64 */
123 { 195, 217, 405, 450 }, /* MCS 65 */
124 { 234, 260, 486, 540 }, /* MCS 66 */
125 { 273, 303, 567, 630 }, /* MCS 67 */
126 { 234, 260, 486, 540 }, /* MCS 68 */
127 { 273, 303, 567, 630 }, /* MCS 69 */
128 { 312, 347, 648, 720 }, /* MCS 70 */
129 { 351, 390, 729, 810 }, /* MCS 71 */
130 { 312, 347, 648, 720 }, /* MCS 72 */
131 { 351, 390, 729, 810 }, /* MCS 73 */
132 { 390, 433, 810, 900 }, /* MCS 74 */
133 { 390, 433, 810, 900 }, /* MCS 75 */
134 { 429, 477, 891, 990 }, /* MCS 76 */
137 #ifdef IEEE80211_AMPDU_AGE
138 static int ieee80211_ampdu_age = -1; /* threshold for ampdu reorder q (ms) */
139 SYSCTL_PROC(_net_wlan, OID_AUTO, ampdu_age, CTLTYPE_INT | CTLFLAG_RW,
140 &ieee80211_ampdu_age, 0, ieee80211_sysctl_msecs_ticks, "I",
141 "AMPDU max reorder age (ms)");
144 static int ieee80211_recv_bar_ena = 1;
145 SYSCTL_INT(_net_wlan, OID_AUTO, recv_bar, CTLFLAG_RW, &ieee80211_recv_bar_ena,
146 0, "BAR frame processing (ena/dis)");
148 static int ieee80211_addba_timeout = -1;/* timeout for ADDBA response */
149 SYSCTL_PROC(_net_wlan, OID_AUTO, addba_timeout, CTLTYPE_INT | CTLFLAG_RW,
150 &ieee80211_addba_timeout, 0, ieee80211_sysctl_msecs_ticks, "I",
151 "ADDBA request timeout (ms)");
152 static int ieee80211_addba_backoff = -1;/* backoff after max ADDBA requests */
153 SYSCTL_PROC(_net_wlan, OID_AUTO, addba_backoff, CTLTYPE_INT | CTLFLAG_RW,
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, CTLTYPE_INT | 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 #ifdef IEEE80211_AMPDU_AGE
180 ieee80211_ampdu_age = msecs_to_ticks(500);
182 ieee80211_addba_timeout = msecs_to_ticks(250);
183 ieee80211_addba_backoff = msecs_to_ticks(10*1000);
184 ieee80211_bar_timeout = msecs_to_ticks(250);
186 * Register action frame handlers.
188 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA,
189 IEEE80211_ACTION_BA_ADDBA_REQUEST, ht_recv_action_ba_addba_request);
190 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA,
191 IEEE80211_ACTION_BA_ADDBA_RESPONSE, ht_recv_action_ba_addba_response);
192 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA,
193 IEEE80211_ACTION_BA_DELBA, ht_recv_action_ba_delba);
194 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_HT,
195 IEEE80211_ACTION_HT_MIMOPWRSAVE, ht_recv_action_ht_mimopwrsave);
196 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_HT,
197 IEEE80211_ACTION_HT_TXCHWIDTH, ht_recv_action_ht_txchwidth);
199 ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA,
200 IEEE80211_ACTION_BA_ADDBA_REQUEST, ht_send_action_ba_addba);
201 ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA,
202 IEEE80211_ACTION_BA_ADDBA_RESPONSE, ht_send_action_ba_addba);
203 ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA,
204 IEEE80211_ACTION_BA_DELBA, ht_send_action_ba_delba);
205 ieee80211_send_action_register(IEEE80211_ACTION_CAT_HT,
206 IEEE80211_ACTION_HT_TXCHWIDTH, ht_send_action_ht_txchwidth);
208 SYSINIT(wlan_ht, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_ht_init, NULL);
210 static int ieee80211_ampdu_enable(struct ieee80211_node *ni,
211 struct ieee80211_tx_ampdu *tap);
212 static int ieee80211_addba_request(struct ieee80211_node *ni,
213 struct ieee80211_tx_ampdu *tap,
214 int dialogtoken, int baparamset, int batimeout);
215 static int ieee80211_addba_response(struct ieee80211_node *ni,
216 struct ieee80211_tx_ampdu *tap,
217 int code, int baparamset, int batimeout);
218 static void ieee80211_addba_stop(struct ieee80211_node *ni,
219 struct ieee80211_tx_ampdu *tap);
220 static void ieee80211_bar_response(struct ieee80211_node *ni,
221 struct ieee80211_tx_ampdu *tap, int status);
222 static void ampdu_tx_stop(struct ieee80211_tx_ampdu *tap);
223 static void bar_stop_timer(struct ieee80211_tx_ampdu *tap);
224 static int ampdu_rx_start(struct ieee80211_node *, struct ieee80211_rx_ampdu *,
225 int baparamset, int batimeout, int baseqctl);
226 static void ampdu_rx_stop(struct ieee80211_node *, struct ieee80211_rx_ampdu *);
229 ieee80211_ht_attach(struct ieee80211com *ic)
231 /* setup default aggregation policy */
232 ic->ic_recv_action = ieee80211_recv_action;
233 ic->ic_send_action = ieee80211_send_action;
234 ic->ic_ampdu_enable = ieee80211_ampdu_enable;
235 ic->ic_addba_request = ieee80211_addba_request;
236 ic->ic_addba_response = ieee80211_addba_response;
237 ic->ic_addba_stop = ieee80211_addba_stop;
238 ic->ic_bar_response = ieee80211_bar_response;
239 ic->ic_ampdu_rx_start = ampdu_rx_start;
240 ic->ic_ampdu_rx_stop = ampdu_rx_stop;
242 ic->ic_htprotmode = IEEE80211_PROT_RTSCTS;
243 ic->ic_curhtprotmode = IEEE80211_HTINFO_OPMODE_PURE;
247 ieee80211_ht_detach(struct ieee80211com *ic)
252 ieee80211_ht_vattach(struct ieee80211vap *vap)
255 /* driver can override defaults */
256 vap->iv_ampdu_rxmax = IEEE80211_HTCAP_MAXRXAMPDU_8K;
257 vap->iv_ampdu_density = IEEE80211_HTCAP_MPDUDENSITY_NA;
258 vap->iv_ampdu_limit = vap->iv_ampdu_rxmax;
259 vap->iv_amsdu_limit = vap->iv_htcaps & IEEE80211_HTCAP_MAXAMSDU;
260 /* tx aggregation traffic thresholds */
261 vap->iv_ampdu_mintraffic[WME_AC_BK] = 128;
262 vap->iv_ampdu_mintraffic[WME_AC_BE] = 64;
263 vap->iv_ampdu_mintraffic[WME_AC_VO] = 32;
264 vap->iv_ampdu_mintraffic[WME_AC_VI] = 32;
266 if (vap->iv_htcaps & IEEE80211_HTC_HT) {
268 * Device is HT capable; enable all HT-related
269 * facilities by default.
270 * XXX these choices may be too aggressive.
272 vap->iv_flags_ht |= IEEE80211_FHT_HT
273 | IEEE80211_FHT_HTCOMPAT
275 if (vap->iv_htcaps & IEEE80211_HTCAP_SHORTGI20)
276 vap->iv_flags_ht |= IEEE80211_FHT_SHORTGI20;
277 /* XXX infer from channel list? */
278 if (vap->iv_htcaps & IEEE80211_HTCAP_CHWIDTH40) {
279 vap->iv_flags_ht |= IEEE80211_FHT_USEHT40;
280 if (vap->iv_htcaps & IEEE80211_HTCAP_SHORTGI40)
281 vap->iv_flags_ht |= IEEE80211_FHT_SHORTGI40;
283 /* enable RIFS if capable */
284 if (vap->iv_htcaps & IEEE80211_HTC_RIFS)
285 vap->iv_flags_ht |= IEEE80211_FHT_RIFS;
287 /* NB: A-MPDU and A-MSDU rx are mandated, these are tx only */
288 vap->iv_flags_ht |= IEEE80211_FHT_AMPDU_RX;
289 if (vap->iv_htcaps & IEEE80211_HTC_AMPDU)
290 vap->iv_flags_ht |= IEEE80211_FHT_AMPDU_TX;
291 vap->iv_flags_ht |= IEEE80211_FHT_AMSDU_RX;
292 if (vap->iv_htcaps & IEEE80211_HTC_AMSDU)
293 vap->iv_flags_ht |= IEEE80211_FHT_AMSDU_TX;
295 /* NB: disable default legacy WDS, too many issues right now */
296 if (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY)
297 vap->iv_flags_ht &= ~IEEE80211_FHT_HT;
301 ieee80211_ht_vdetach(struct ieee80211vap *vap)
306 ht_getrate(struct ieee80211com *ic, int index, int mode, int ratetype)
310 mword = ieee80211_rate2media(ic, index | IEEE80211_RATE_MCS, mode);
311 if (IFM_SUBTYPE(mword) != IFM_IEEE80211_MCS)
315 rate = ieee80211_htrates[index].ht20_rate_800ns;
318 rate = ieee80211_htrates[index].ht20_rate_400ns;
321 rate = ieee80211_htrates[index].ht40_rate_800ns;
324 rate = ieee80211_htrates[index].ht40_rate_400ns;
330 static struct printranges {
341 { 32, 0, 1, 2, IEEE80211_HTC_TXMCS32 },
342 { 33, 38, 2, 0, IEEE80211_HTC_TXUNEQUAL },
343 { 39, 52, 3, 0, IEEE80211_HTC_TXUNEQUAL },
344 { 53, 76, 4, 0, IEEE80211_HTC_TXUNEQUAL },
349 ht_rateprint(struct ieee80211com *ic, int mode, int ratetype)
351 struct ifnet *ifp = ic->ic_ifp;
352 int minrate, maxrate;
353 struct printranges *range;
355 for (range = ranges; range->txstream != 0; range++) {
356 if (ic->ic_txstream < range->txstream)
358 if (range->htcapflags &&
359 (ic->ic_htcaps & range->htcapflags) == 0)
361 if (ratetype < range->ratetype)
363 minrate = ht_getrate(ic, range->minmcs, mode, ratetype);
364 maxrate = ht_getrate(ic, range->maxmcs, mode, ratetype);
366 if_printf(ifp, "MCS %d-%d: %d%sMbps - %d%sMbps\n",
367 range->minmcs, range->maxmcs,
368 minrate/2, ((minrate & 0x1) != 0 ? ".5" : ""),
369 maxrate/2, ((maxrate & 0x1) != 0 ? ".5" : ""));
371 if_printf(ifp, "MCS %d: %d%sMbps\n", range->minmcs,
372 minrate/2, ((minrate & 0x1) != 0 ? ".5" : ""));
378 ht_announce(struct ieee80211com *ic, int mode)
380 struct ifnet *ifp = ic->ic_ifp;
381 const char *modestr = ieee80211_phymode_name[mode];
383 if_printf(ifp, "%s MCS 20MHz\n", modestr);
384 ht_rateprint(ic, mode, 0);
385 if (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20) {
386 if_printf(ifp, "%s MCS 20MHz SGI\n", modestr);
387 ht_rateprint(ic, mode, 1);
389 if (ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) {
390 if_printf(ifp, "%s MCS 40MHz:\n", modestr);
391 ht_rateprint(ic, mode, 2);
393 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) &&
394 (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40)) {
395 if_printf(ifp, "%s MCS 40MHz SGI:\n", modestr);
396 ht_rateprint(ic, mode, 3);
401 ieee80211_ht_announce(struct ieee80211com *ic)
403 struct ifnet *ifp = ic->ic_ifp;
405 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) ||
406 isset(ic->ic_modecaps, IEEE80211_MODE_11NG))
407 if_printf(ifp, "%dT%dR\n", ic->ic_txstream, ic->ic_rxstream);
408 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA))
409 ht_announce(ic, IEEE80211_MODE_11NA);
410 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NG))
411 ht_announce(ic, IEEE80211_MODE_11NG);
414 static struct ieee80211_htrateset htrateset;
416 const struct ieee80211_htrateset *
417 ieee80211_get_suphtrates(struct ieee80211com *ic,
418 const struct ieee80211_channel *c)
420 #define ADDRATE(x) do { \
421 htrateset.rs_rates[htrateset.rs_nrates] = x; \
422 htrateset.rs_nrates++; \
426 memset(&htrateset, 0, sizeof(struct ieee80211_htrateset));
427 for (i = 0; i < ic->ic_txstream * 8; i++)
429 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) &&
430 (ic->ic_htcaps & IEEE80211_HTC_TXMCS32))
432 if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL) {
433 if (ic->ic_txstream >= 2) {
434 for (i = 33; i <= 38; i++)
437 if (ic->ic_txstream >= 3) {
438 for (i = 39; i <= 52; i++)
441 if (ic->ic_txstream == 4) {
442 for (i = 53; i <= 76; i++)
451 * Receive processing.
455 * Decap the encapsulated A-MSDU frames and dispatch all but
456 * the last for delivery. The last frame is returned for
457 * delivery via the normal path.
460 ieee80211_decap_amsdu(struct ieee80211_node *ni, struct mbuf *m)
462 struct ieee80211vap *vap = ni->ni_vap;
466 /* discard 802.3 header inserted by ieee80211_decap */
467 m_adj(m, sizeof(struct ether_header));
469 vap->iv_stats.is_amsdu_decap++;
473 * Decap the first frame, bust it apart from the
474 * remainder and deliver. We leave the last frame
475 * delivery to the caller (for consistency with other
476 * code paths, could also do it here).
478 m = ieee80211_decap1(m, &framelen);
480 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
481 ni->ni_macaddr, "a-msdu", "%s", "decap failed");
482 vap->iv_stats.is_amsdu_tooshort++;
485 if (m->m_pkthdr.len == framelen)
487 n = m_split(m, framelen, M_NOWAIT);
489 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
490 ni->ni_macaddr, "a-msdu",
491 "%s", "unable to split encapsulated frames");
492 vap->iv_stats.is_amsdu_split++;
493 m_freem(m); /* NB: must reclaim */
496 vap->iv_deliver_data(vap, ni, m);
499 * Remove frame contents; each intermediate frame
500 * is required to be aligned to a 4-byte boundary.
503 m_adj(m, roundup2(framelen, 4) - framelen); /* padding */
505 return m; /* last delivered by caller */
509 * Purge all frames in the A-MPDU re-order queue.
512 ampdu_rx_purge(struct ieee80211_rx_ampdu *rap)
517 for (i = 0; i < rap->rxa_wnd; i++) {
520 rap->rxa_m[i] = NULL;
521 rap->rxa_qbytes -= m->m_pkthdr.len;
523 if (--rap->rxa_qframes == 0)
527 KASSERT(rap->rxa_qbytes == 0 && rap->rxa_qframes == 0,
528 ("lost %u data, %u frames on ampdu rx q",
529 rap->rxa_qbytes, rap->rxa_qframes));
533 * Start A-MPDU rx/re-order processing for the specified TID.
536 ampdu_rx_start(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap,
537 int baparamset, int batimeout, int baseqctl)
539 int bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ);
541 if (rap->rxa_flags & IEEE80211_AGGR_RUNNING) {
543 * AMPDU previously setup and not terminated with a DELBA,
544 * flush the reorder q's in case anything remains.
548 memset(rap, 0, sizeof(*rap));
549 rap->rxa_wnd = (bufsiz == 0) ?
550 IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX);
551 rap->rxa_start = MS(baseqctl, IEEE80211_BASEQ_START);
552 rap->rxa_flags |= IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_XCHGPEND;
558 * Stop A-MPDU rx processing for the specified TID.
561 ampdu_rx_stop(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap)
565 rap->rxa_flags &= ~(IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_XCHGPEND);
569 * Dispatch a frame from the A-MPDU reorder queue. The
570 * frame is fed back into ieee80211_input marked with an
571 * M_AMPDU_MPDU flag so it doesn't come back to us (it also
572 * permits ieee80211_input to optimize re-processing).
575 ampdu_dispatch(struct ieee80211_node *ni, struct mbuf *m)
577 m->m_flags |= M_AMPDU_MPDU; /* bypass normal processing */
578 /* NB: rssi and noise are ignored w/ M_AMPDU_MPDU set */
579 (void) ieee80211_input(ni, m, 0, 0);
583 * Dispatch as many frames as possible from the re-order queue.
584 * Frames will always be "at the front"; we process all frames
585 * up to the first empty slot in the window. On completion we
586 * cleanup state if there are still pending frames in the current
587 * BA window. We assume the frame at slot 0 is already handled
588 * by the caller; we always start at slot 1.
591 ampdu_rx_dispatch(struct ieee80211_rx_ampdu *rap, struct ieee80211_node *ni)
593 struct ieee80211vap *vap = ni->ni_vap;
597 /* flush run of frames */
598 for (i = 1; i < rap->rxa_wnd; i++) {
602 rap->rxa_m[i] = NULL;
603 rap->rxa_qbytes -= m->m_pkthdr.len;
606 ampdu_dispatch(ni, m);
609 * If frames remain, copy the mbuf pointers down so
610 * they correspond to the offsets in the new window.
612 if (rap->rxa_qframes != 0) {
613 int n = rap->rxa_qframes, j;
614 for (j = i+1; j < rap->rxa_wnd; j++) {
615 if (rap->rxa_m[j] != NULL) {
616 rap->rxa_m[j-i] = rap->rxa_m[j];
617 rap->rxa_m[j] = NULL;
622 KASSERT(n == 0, ("lost %d frames", n));
623 vap->iv_stats.is_ampdu_rx_copy += rap->rxa_qframes;
626 * Adjust the start of the BA window to
627 * reflect the frames just dispatched.
629 rap->rxa_start = IEEE80211_SEQ_ADD(rap->rxa_start, i);
630 vap->iv_stats.is_ampdu_rx_oor += i;
633 #ifdef IEEE80211_AMPDU_AGE
635 * Dispatch all frames in the A-MPDU re-order queue.
638 ampdu_rx_flush(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap)
640 struct ieee80211vap *vap = ni->ni_vap;
644 for (i = 0; i < rap->rxa_wnd; i++) {
648 rap->rxa_m[i] = NULL;
649 rap->rxa_qbytes -= m->m_pkthdr.len;
651 vap->iv_stats.is_ampdu_rx_oor++;
653 ampdu_dispatch(ni, m);
654 if (rap->rxa_qframes == 0)
658 #endif /* IEEE80211_AMPDU_AGE */
661 * Dispatch all frames in the A-MPDU re-order queue
662 * preceding the specified sequence number. This logic
663 * handles window moves due to a received MSDU or BAR.
666 ampdu_rx_flush_upto(struct ieee80211_node *ni,
667 struct ieee80211_rx_ampdu *rap, ieee80211_seq winstart)
669 struct ieee80211vap *vap = ni->ni_vap;
675 * Flush any complete MSDU's with a sequence number lower
676 * than winstart. Gaps may exist. Note that we may actually
677 * dispatch frames past winstart if a run continues; this is
678 * an optimization that avoids having to do a separate pass
679 * to dispatch frames after moving the BA window start.
681 seqno = rap->rxa_start;
682 for (i = 0; i < rap->rxa_wnd; i++) {
685 rap->rxa_m[i] = NULL;
686 rap->rxa_qbytes -= m->m_pkthdr.len;
688 vap->iv_stats.is_ampdu_rx_oor++;
690 ampdu_dispatch(ni, m);
692 if (!IEEE80211_SEQ_BA_BEFORE(seqno, winstart))
695 seqno = IEEE80211_SEQ_INC(seqno);
698 * If frames remain, copy the mbuf pointers down so
699 * they correspond to the offsets in the new window.
701 if (rap->rxa_qframes != 0) {
702 int n = rap->rxa_qframes, j;
704 /* NB: this loop assumes i > 0 and/or rxa_m[0] is NULL */
705 KASSERT(rap->rxa_m[0] == NULL,
706 ("%s: BA window slot 0 occupied", __func__));
707 for (j = i+1; j < rap->rxa_wnd; j++) {
708 if (rap->rxa_m[j] != NULL) {
709 rap->rxa_m[j-i] = rap->rxa_m[j];
710 rap->rxa_m[j] = NULL;
715 KASSERT(n == 0, ("%s: lost %d frames, qframes %d off %d "
716 "BA win <%d:%d> winstart %d",
717 __func__, n, rap->rxa_qframes, i, rap->rxa_start,
718 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
720 vap->iv_stats.is_ampdu_rx_copy += rap->rxa_qframes;
723 * Move the start of the BA window; we use the
724 * sequence number of the last MSDU that was
725 * passed up the stack+1 or winstart if stopped on
726 * a gap in the reorder buffer.
728 rap->rxa_start = seqno;
732 * Process a received QoS data frame for an HT station. Handle
733 * A-MPDU reordering: if this frame is received out of order
734 * and falls within the BA window hold onto it. Otherwise if
735 * this frame completes a run, flush any pending frames. We
736 * return 1 if the frame is consumed. A 0 is returned if
737 * the frame should be processed normally by the caller.
740 ieee80211_ampdu_reorder(struct ieee80211_node *ni, struct mbuf *m)
742 #define IEEE80211_FC0_QOSDATA \
743 (IEEE80211_FC0_TYPE_DATA|IEEE80211_FC0_SUBTYPE_QOS|IEEE80211_FC0_VERSION_0)
744 #define PROCESS 0 /* caller should process frame */
745 #define CONSUMED 1 /* frame consumed, caller does nothing */
746 struct ieee80211vap *vap = ni->ni_vap;
747 struct ieee80211_qosframe *wh;
748 struct ieee80211_rx_ampdu *rap;
753 KASSERT((m->m_flags & (M_AMPDU | M_AMPDU_MPDU)) == M_AMPDU,
754 ("!a-mpdu or already re-ordered, flags 0x%x", m->m_flags));
755 KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT sta"));
757 /* NB: m_len known to be sufficient */
758 wh = mtod(m, struct ieee80211_qosframe *);
759 if (wh->i_fc[0] != IEEE80211_FC0_QOSDATA) {
761 * Not QoS data, shouldn't get here but just
762 * return it to the caller for processing.
766 if (IEEE80211_IS_DSTODS(wh))
767 tid = ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0];
770 tid &= IEEE80211_QOS_TID;
771 rap = &ni->ni_rx_ampdu[tid];
772 if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) {
774 * No ADDBA request yet, don't touch.
778 rxseq = le16toh(*(uint16_t *)wh->i_seq);
779 if ((rxseq & IEEE80211_SEQ_FRAG_MASK) != 0) {
781 * Fragments are not allowed; toss.
783 IEEE80211_DISCARD_MAC(vap,
784 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr,
785 "A-MPDU", "fragment, rxseq 0x%x tid %u%s", rxseq, tid,
786 wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : "");
787 vap->iv_stats.is_ampdu_rx_drop++;
788 IEEE80211_NODE_STAT(ni, rx_drop);
792 rxseq >>= IEEE80211_SEQ_SEQ_SHIFT;
795 if (rxseq == rap->rxa_start) {
797 * First frame in window.
799 if (rap->rxa_qframes != 0) {
801 * Dispatch as many packets as we can.
803 KASSERT(rap->rxa_m[0] == NULL, ("unexpected dup"));
804 ampdu_dispatch(ni, m);
805 ampdu_rx_dispatch(rap, ni);
809 * In order; advance window and notify
810 * caller to dispatch directly.
812 rap->rxa_start = IEEE80211_SEQ_INC(rxseq);
817 * Frame is out of order; store if in the BA window.
819 /* calculate offset in BA window */
820 off = IEEE80211_SEQ_SUB(rxseq, rap->rxa_start);
821 if (off < rap->rxa_wnd) {
823 * Common case (hopefully): in the BA window.
824 * Sec 9.10.7.6.2 a) (p.137)
826 #ifdef IEEE80211_AMPDU_AGE
828 * Check for frames sitting too long in the reorder queue.
829 * This should only ever happen if frames are not delivered
830 * without the sender otherwise notifying us (e.g. with a
831 * BAR to move the window). Typically this happens because
832 * of vendor bugs that cause the sequence number to jump.
833 * When this happens we get a gap in the reorder queue that
834 * leaves frame sitting on the queue until they get pushed
835 * out due to window moves. When the vendor does not send
836 * BAR this move only happens due to explicit packet sends
838 * NB: we only track the time of the oldest frame in the
839 * reorder q; this means that if we flush we might push
840 * frames that still "new"; if this happens then subsequent
841 * frames will result in BA window moves which cost something
842 * but is still better than a big throughput dip.
844 if (rap->rxa_qframes != 0) {
845 /* XXX honor batimeout? */
846 if (ticks - rap->rxa_age > ieee80211_ampdu_age) {
848 * Too long since we received the first
849 * frame; flush the reorder buffer.
851 if (rap->rxa_qframes != 0) {
852 vap->iv_stats.is_ampdu_rx_age +=
854 ampdu_rx_flush(ni, rap);
856 rap->rxa_start = IEEE80211_SEQ_INC(rxseq);
861 * First frame, start aging timer.
863 rap->rxa_age = ticks;
865 #endif /* IEEE80211_AMPDU_AGE */
867 if (rap->rxa_m[off] == NULL) {
870 rap->rxa_qbytes += m->m_pkthdr.len;
871 vap->iv_stats.is_ampdu_rx_reorder++;
873 IEEE80211_DISCARD_MAC(vap,
874 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N,
875 ni->ni_macaddr, "a-mpdu duplicate",
876 "seqno %u tid %u BA win <%u:%u>",
877 rxseq, tid, rap->rxa_start,
878 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1));
879 vap->iv_stats.is_rx_dup++;
880 IEEE80211_NODE_STAT(ni, rx_dup);
885 if (off < IEEE80211_SEQ_BA_RANGE) {
887 * Outside the BA window, but within range;
888 * flush the reorder q and move the window.
889 * Sec 9.10.7.6.2 b) (p.138)
891 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni,
892 "move BA win <%u:%u> (%u frames) rxseq %u tid %u",
894 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
895 rap->rxa_qframes, rxseq, tid);
896 vap->iv_stats.is_ampdu_rx_move++;
899 * The spec says to flush frames up to but not including:
900 * WinStart_B = rxseq - rap->rxa_wnd + 1
901 * Then insert the frame or notify the caller to process
902 * it immediately. We can safely do this by just starting
903 * over again because we know the frame will now be within
906 /* NB: rxa_wnd known to be >0 */
907 ampdu_rx_flush_upto(ni, rap,
908 IEEE80211_SEQ_SUB(rxseq, rap->rxa_wnd-1));
912 * Outside the BA window and out of range; toss.
913 * Sec 9.10.7.6.2 c) (p.138)
915 IEEE80211_DISCARD_MAC(vap,
916 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr,
917 "MPDU", "BA win <%u:%u> (%u frames) rxseq %u tid %u%s",
919 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
920 rap->rxa_qframes, rxseq, tid,
921 wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : "");
922 vap->iv_stats.is_ampdu_rx_drop++;
923 IEEE80211_NODE_STAT(ni, rx_drop);
929 #undef IEEE80211_FC0_QOSDATA
933 * Process a BAR ctl frame. Dispatch all frames up to
934 * the sequence number of the frame. If this frame is
935 * out of range it's discarded.
938 ieee80211_recv_bar(struct ieee80211_node *ni, struct mbuf *m0)
940 struct ieee80211vap *vap = ni->ni_vap;
941 struct ieee80211_frame_bar *wh;
942 struct ieee80211_rx_ampdu *rap;
946 if (!ieee80211_recv_bar_ena) {
948 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_11N,
949 ni->ni_macaddr, "BAR", "%s", "processing disabled");
951 vap->iv_stats.is_ampdu_bar_bad++;
954 wh = mtod(m0, struct ieee80211_frame_bar *);
955 /* XXX check basic BAR */
956 tid = MS(le16toh(wh->i_ctl), IEEE80211_BAR_TID);
957 rap = &ni->ni_rx_ampdu[tid];
958 if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) {
960 * No ADDBA request yet, don't touch.
962 IEEE80211_DISCARD_MAC(vap,
963 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N,
964 ni->ni_macaddr, "BAR", "no BA stream, tid %u", tid);
965 vap->iv_stats.is_ampdu_bar_bad++;
968 vap->iv_stats.is_ampdu_bar_rx++;
969 rxseq = le16toh(wh->i_seq) >> IEEE80211_SEQ_SEQ_SHIFT;
970 if (rxseq == rap->rxa_start)
972 /* calculate offset in BA window */
973 off = IEEE80211_SEQ_SUB(rxseq, rap->rxa_start);
974 if (off < IEEE80211_SEQ_BA_RANGE) {
976 * Flush the reorder q up to rxseq and move the window.
977 * Sec 9.10.7.6.3 a) (p.138)
979 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni,
980 "BAR moves BA win <%u:%u> (%u frames) rxseq %u tid %u",
982 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
983 rap->rxa_qframes, rxseq, tid);
984 vap->iv_stats.is_ampdu_bar_move++;
986 ampdu_rx_flush_upto(ni, rap, rxseq);
987 if (off >= rap->rxa_wnd) {
989 * BAR specifies a window start to the right of BA
990 * window; we must move it explicitly since
991 * ampdu_rx_flush_upto will not.
993 rap->rxa_start = rxseq;
997 * Out of range; toss.
998 * Sec 9.10.7.6.3 b) (p.138)
1000 IEEE80211_DISCARD_MAC(vap,
1001 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr,
1002 "BAR", "BA win <%u:%u> (%u frames) rxseq %u tid %u%s",
1004 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1),
1005 rap->rxa_qframes, rxseq, tid,
1006 wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : "");
1007 vap->iv_stats.is_ampdu_bar_oow++;
1008 IEEE80211_NODE_STAT(ni, rx_drop);
1013 * Setup HT-specific state in a node. Called only
1014 * when HT use is negotiated so we don't do extra
1015 * work for temporary and/or legacy sta's.
1018 ieee80211_ht_node_init(struct ieee80211_node *ni)
1020 struct ieee80211_tx_ampdu *tap;
1023 if (ni->ni_flags & IEEE80211_NODE_HT) {
1025 * Clean AMPDU state on re-associate. This handles the case
1026 * where a station leaves w/o notifying us and then returns
1027 * before node is reaped for inactivity.
1029 ieee80211_ht_node_cleanup(ni);
1031 for (ac = 0; ac < WME_NUM_AC; ac++) {
1032 tap = &ni->ni_tx_ampdu[ac];
1035 /* NB: further initialization deferred */
1037 ni->ni_flags |= IEEE80211_NODE_HT | IEEE80211_NODE_AMPDU;
1041 * Cleanup HT-specific state in a node. Called only
1042 * when HT use has been marked.
1045 ieee80211_ht_node_cleanup(struct ieee80211_node *ni)
1047 struct ieee80211com *ic = ni->ni_ic;
1050 KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT node"));
1052 /* XXX optimize this */
1053 for (i = 0; i < WME_NUM_AC; i++) {
1054 struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[i];
1055 if (tap->txa_flags & IEEE80211_AGGR_SETUP)
1058 for (i = 0; i < WME_NUM_TID; i++)
1059 ic->ic_ampdu_rx_stop(ni, &ni->ni_rx_ampdu[i]);
1062 ni->ni_flags &= ~IEEE80211_NODE_HT_ALL;
1066 * Age out HT resources for a station.
1069 ieee80211_ht_node_age(struct ieee80211_node *ni)
1071 #ifdef IEEE80211_AMPDU_AGE
1072 struct ieee80211vap *vap = ni->ni_vap;
1076 KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT sta"));
1078 #ifdef IEEE80211_AMPDU_AGE
1079 for (tid = 0; tid < WME_NUM_TID; tid++) {
1080 struct ieee80211_rx_ampdu *rap;
1082 rap = &ni->ni_rx_ampdu[tid];
1083 if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0)
1085 if (rap->rxa_qframes == 0)
1088 * Check for frames sitting too long in the reorder queue.
1089 * See above for more details on what's happening here.
1091 /* XXX honor batimeout? */
1092 if (ticks - rap->rxa_age > ieee80211_ampdu_age) {
1094 * Too long since we received the first
1095 * frame; flush the reorder buffer.
1097 vap->iv_stats.is_ampdu_rx_age += rap->rxa_qframes;
1098 ampdu_rx_flush(ni, rap);
1101 #endif /* IEEE80211_AMPDU_AGE */
1104 static struct ieee80211_channel *
1105 findhtchan(struct ieee80211com *ic, struct ieee80211_channel *c, int htflags)
1107 return ieee80211_find_channel(ic, c->ic_freq,
1108 (c->ic_flags &~ IEEE80211_CHAN_HT) | htflags);
1112 * Adjust a channel to be HT/non-HT according to the vap's configuration.
1114 struct ieee80211_channel *
1115 ieee80211_ht_adjust_channel(struct ieee80211com *ic,
1116 struct ieee80211_channel *chan, int flags)
1118 struct ieee80211_channel *c;
1120 if (flags & IEEE80211_FHT_HT) {
1121 /* promote to HT if possible */
1122 if (flags & IEEE80211_FHT_USEHT40) {
1123 if (!IEEE80211_IS_CHAN_HT40(chan)) {
1124 /* NB: arbitrarily pick ht40+ over ht40- */
1125 c = findhtchan(ic, chan, IEEE80211_CHAN_HT40U);
1127 c = findhtchan(ic, chan,
1128 IEEE80211_CHAN_HT40D);
1130 c = findhtchan(ic, chan,
1131 IEEE80211_CHAN_HT20);
1135 } else if (!IEEE80211_IS_CHAN_HT20(chan)) {
1136 c = findhtchan(ic, chan, IEEE80211_CHAN_HT20);
1140 } else if (IEEE80211_IS_CHAN_HT(chan)) {
1141 /* demote to legacy, HT use is disabled */
1142 c = ieee80211_find_channel(ic, chan->ic_freq,
1143 chan->ic_flags &~ IEEE80211_CHAN_HT);
1151 * Setup HT-specific state for a legacy WDS peer.
1154 ieee80211_ht_wds_init(struct ieee80211_node *ni)
1156 struct ieee80211vap *vap = ni->ni_vap;
1157 struct ieee80211_tx_ampdu *tap;
1160 KASSERT(vap->iv_flags_ht & IEEE80211_FHT_HT, ("no HT requested"));
1162 /* XXX check scan cache in case peer has an ap and we have info */
1164 * If setup with a legacy channel; locate an HT channel.
1165 * Otherwise if the inherited channel (from a companion
1166 * AP) is suitable use it so we use the same location
1167 * for the extension channel).
1169 ni->ni_chan = ieee80211_ht_adjust_channel(ni->ni_ic,
1170 ni->ni_chan, ieee80211_htchanflags(ni->ni_chan));
1173 if (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20)
1174 ni->ni_htcap |= IEEE80211_HTCAP_SHORTGI20;
1175 if (IEEE80211_IS_CHAN_HT40(ni->ni_chan)) {
1176 ni->ni_htcap |= IEEE80211_HTCAP_CHWIDTH40;
1178 if (IEEE80211_IS_CHAN_HT40U(ni->ni_chan))
1179 ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_ABOVE;
1180 else if (IEEE80211_IS_CHAN_HT40D(ni->ni_chan))
1181 ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_BELOW;
1182 if (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40)
1183 ni->ni_htcap |= IEEE80211_HTCAP_SHORTGI40;
1186 ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_NONE;
1188 ni->ni_htctlchan = ni->ni_chan->ic_ieee;
1189 if (vap->iv_flags_ht & IEEE80211_FHT_RIFS)
1190 ni->ni_flags |= IEEE80211_NODE_RIFS;
1191 /* XXX does it make sense to enable SMPS? */
1193 ni->ni_htopmode = 0; /* XXX need protection state */
1194 ni->ni_htstbc = 0; /* XXX need info */
1196 for (ac = 0; ac < WME_NUM_AC; ac++) {
1197 tap = &ni->ni_tx_ampdu[ac];
1200 /* NB: AMPDU tx/rx governed by IEEE80211_FHT_AMPDU_{TX,RX} */
1201 ni->ni_flags |= IEEE80211_NODE_HT | IEEE80211_NODE_AMPDU;
1205 * Notify hostap vaps of a change in the HTINFO ie.
1208 htinfo_notify(struct ieee80211com *ic)
1210 struct ieee80211vap *vap;
1213 IEEE80211_LOCK_ASSERT(ic);
1215 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
1216 if (vap->iv_opmode != IEEE80211_M_HOSTAP)
1218 if (vap->iv_state != IEEE80211_S_RUN ||
1219 !IEEE80211_IS_CHAN_HT(vap->iv_bss->ni_chan))
1223 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N,
1225 "HT bss occupancy change: %d sta, %d ht, "
1226 "%d ht40%s, HT protmode now 0x%x"
1228 , ic->ic_ht_sta_assoc
1229 , ic->ic_ht40_sta_assoc
1230 , (ic->ic_flags_ht & IEEE80211_FHT_NONHT_PR) ?
1231 ", non-HT sta present" : ""
1232 , ic->ic_curhtprotmode);
1235 ieee80211_beacon_notify(vap, IEEE80211_BEACON_HTINFO);
1240 * Calculate HT protection mode from current
1241 * state and handle updates.
1244 htinfo_update(struct ieee80211com *ic)
1248 if (ic->ic_sta_assoc != ic->ic_ht_sta_assoc) {
1249 protmode = IEEE80211_HTINFO_OPMODE_MIXED
1250 | IEEE80211_HTINFO_NONHT_PRESENT;
1251 } else if (ic->ic_flags_ht & IEEE80211_FHT_NONHT_PR) {
1252 protmode = IEEE80211_HTINFO_OPMODE_PROTOPT
1253 | IEEE80211_HTINFO_NONHT_PRESENT;
1254 } else if (ic->ic_bsschan != IEEE80211_CHAN_ANYC &&
1255 IEEE80211_IS_CHAN_HT40(ic->ic_bsschan) &&
1256 ic->ic_sta_assoc != ic->ic_ht40_sta_assoc) {
1257 protmode = IEEE80211_HTINFO_OPMODE_HT20PR;
1259 protmode = IEEE80211_HTINFO_OPMODE_PURE;
1261 if (protmode != ic->ic_curhtprotmode) {
1262 ic->ic_curhtprotmode = protmode;
1268 * Handle an HT station joining a BSS.
1271 ieee80211_ht_node_join(struct ieee80211_node *ni)
1273 struct ieee80211com *ic = ni->ni_ic;
1275 IEEE80211_LOCK_ASSERT(ic);
1277 if (ni->ni_flags & IEEE80211_NODE_HT) {
1278 ic->ic_ht_sta_assoc++;
1279 if (ni->ni_chw == 40)
1280 ic->ic_ht40_sta_assoc++;
1286 * Handle an HT station leaving a BSS.
1289 ieee80211_ht_node_leave(struct ieee80211_node *ni)
1291 struct ieee80211com *ic = ni->ni_ic;
1293 IEEE80211_LOCK_ASSERT(ic);
1295 if (ni->ni_flags & IEEE80211_NODE_HT) {
1296 ic->ic_ht_sta_assoc--;
1297 if (ni->ni_chw == 40)
1298 ic->ic_ht40_sta_assoc--;
1304 * Public version of htinfo_update; used for processing
1305 * beacon frames from overlapping bss.
1307 * Caller can specify either IEEE80211_HTINFO_OPMODE_MIXED
1308 * (on receipt of a beacon that advertises MIXED) or
1309 * IEEE80211_HTINFO_OPMODE_PROTOPT (on receipt of a beacon
1310 * from an overlapping legacy bss). We treat MIXED with
1311 * a higher precedence than PROTOPT (i.e. we will not change
1312 * change PROTOPT -> MIXED; only MIXED -> PROTOPT). This
1313 * corresponds to how we handle things in htinfo_update.
1316 ieee80211_htprot_update(struct ieee80211com *ic, int protmode)
1318 #define OPMODE(x) SM(x, IEEE80211_HTINFO_OPMODE)
1321 /* track non-HT station presence */
1322 KASSERT(protmode & IEEE80211_HTINFO_NONHT_PRESENT,
1323 ("protmode 0x%x", protmode));
1324 ic->ic_flags_ht |= IEEE80211_FHT_NONHT_PR;
1325 ic->ic_lastnonht = ticks;
1327 if (protmode != ic->ic_curhtprotmode &&
1328 (OPMODE(ic->ic_curhtprotmode) != IEEE80211_HTINFO_OPMODE_MIXED ||
1329 OPMODE(protmode) == IEEE80211_HTINFO_OPMODE_PROTOPT)) {
1330 /* push beacon update */
1331 ic->ic_curhtprotmode = protmode;
1334 IEEE80211_UNLOCK(ic);
1339 * Time out presence of an overlapping bss with non-HT
1340 * stations. When operating in hostap mode we listen for
1341 * beacons from other stations and if we identify a non-HT
1342 * station is present we update the opmode field of the
1343 * HTINFO ie. To identify when all non-HT stations are
1344 * gone we time out this condition.
1347 ieee80211_ht_timeout(struct ieee80211com *ic)
1349 IEEE80211_LOCK_ASSERT(ic);
1351 if ((ic->ic_flags_ht & IEEE80211_FHT_NONHT_PR) &&
1352 time_after(ticks, ic->ic_lastnonht + IEEE80211_NONHT_PRESENT_AGE)) {
1354 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni,
1355 "%s", "time out non-HT STA present on channel");
1357 ic->ic_flags_ht &= ~IEEE80211_FHT_NONHT_PR;
1362 /* unalligned little endian access */
1363 #define LE_READ_2(p) \
1365 ((((const uint8_t *)(p))[0] ) | \
1366 (((const uint8_t *)(p))[1] << 8)))
1369 * Process an 802.11n HT capabilities ie.
1372 ieee80211_parse_htcap(struct ieee80211_node *ni, const uint8_t *ie)
1374 if (ie[0] == IEEE80211_ELEMID_VENDOR) {
1376 * Station used Vendor OUI ie to associate;
1377 * mark the node so when we respond we'll use
1378 * the Vendor OUI's and not the standard ie's.
1380 ni->ni_flags |= IEEE80211_NODE_HTCOMPAT;
1383 ni->ni_flags &= ~IEEE80211_NODE_HTCOMPAT;
1385 ni->ni_htcap = LE_READ_2(ie +
1386 __offsetof(struct ieee80211_ie_htcap, hc_cap));
1387 ni->ni_htparam = ie[__offsetof(struct ieee80211_ie_htcap, hc_param)];
1391 htinfo_parse(struct ieee80211_node *ni,
1392 const struct ieee80211_ie_htinfo *htinfo)
1396 ni->ni_htctlchan = htinfo->hi_ctrlchannel;
1397 ni->ni_ht2ndchan = SM(htinfo->hi_byte1, IEEE80211_HTINFO_2NDCHAN);
1398 w = LE_READ_2(&htinfo->hi_byte2);
1399 ni->ni_htopmode = SM(w, IEEE80211_HTINFO_OPMODE);
1400 w = LE_READ_2(&htinfo->hi_byte45);
1401 ni->ni_htstbc = SM(w, IEEE80211_HTINFO_BASIC_STBCMCS);
1405 * Parse an 802.11n HT info ie and save useful information
1406 * to the node state. Note this does not effect any state
1407 * changes such as for channel width change.
1410 ieee80211_parse_htinfo(struct ieee80211_node *ni, const uint8_t *ie)
1412 if (ie[0] == IEEE80211_ELEMID_VENDOR)
1414 htinfo_parse(ni, (const struct ieee80211_ie_htinfo *) ie);
1418 * Handle 11n channel switch. Use the received HT ie's to
1419 * identify the right channel to use. If we cannot locate it
1420 * in the channel table then fallback to legacy operation.
1421 * Note that we use this information to identify the node's
1422 * channel only; the caller is responsible for insuring any
1423 * required channel change is done (e.g. in sta mode when
1424 * parsing the contents of a beacon frame).
1427 htinfo_update_chw(struct ieee80211_node *ni, int htflags)
1429 struct ieee80211com *ic = ni->ni_ic;
1430 struct ieee80211_channel *c;
1433 chanflags = (ni->ni_chan->ic_flags &~ IEEE80211_CHAN_HT) | htflags;
1434 if (chanflags != ni->ni_chan->ic_flags) {
1435 /* XXX not right for ht40- */
1436 c = ieee80211_find_channel(ic, ni->ni_chan->ic_freq, chanflags);
1437 if (c == NULL && (htflags & IEEE80211_CHAN_HT40)) {
1439 * No HT40 channel entry in our table; fall back
1440 * to HT20 operation. This should not happen.
1442 c = findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT20);
1444 IEEE80211_NOTE(ni->ni_vap,
1445 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni,
1446 "no HT40 channel (freq %u), falling back to HT20",
1447 ni->ni_chan->ic_freq);
1451 if (c != NULL && c != ni->ni_chan) {
1452 IEEE80211_NOTE(ni->ni_vap,
1453 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni,
1454 "switch station to HT%d channel %u/0x%x",
1455 IEEE80211_IS_CHAN_HT40(c) ? 40 : 20,
1456 c->ic_freq, c->ic_flags);
1459 /* NB: caller responsible for forcing any channel change */
1461 /* update node's tx channel width */
1462 ni->ni_chw = IEEE80211_IS_CHAN_HT40(ni->ni_chan)? 40 : 20;
1466 * Update 11n MIMO PS state according to received htcap.
1469 htcap_update_mimo_ps(struct ieee80211_node *ni)
1471 uint16_t oflags = ni->ni_flags;
1473 switch (ni->ni_htcap & IEEE80211_HTCAP_SMPS) {
1474 case IEEE80211_HTCAP_SMPS_DYNAMIC:
1475 ni->ni_flags |= IEEE80211_NODE_MIMO_PS;
1476 ni->ni_flags |= IEEE80211_NODE_MIMO_RTS;
1478 case IEEE80211_HTCAP_SMPS_ENA:
1479 ni->ni_flags |= IEEE80211_NODE_MIMO_PS;
1480 ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS;
1482 case IEEE80211_HTCAP_SMPS_OFF:
1483 default: /* disable on rx of reserved value */
1484 ni->ni_flags &= ~IEEE80211_NODE_MIMO_PS;
1485 ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS;
1488 return (oflags ^ ni->ni_flags);
1492 * Update short GI state according to received htcap
1493 * and local settings.
1495 static __inline void
1496 htcap_update_shortgi(struct ieee80211_node *ni)
1498 struct ieee80211vap *vap = ni->ni_vap;
1500 ni->ni_flags &= ~(IEEE80211_NODE_SGI20|IEEE80211_NODE_SGI40);
1501 if ((ni->ni_htcap & IEEE80211_HTCAP_SHORTGI20) &&
1502 (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20))
1503 ni->ni_flags |= IEEE80211_NODE_SGI20;
1504 if ((ni->ni_htcap & IEEE80211_HTCAP_SHORTGI40) &&
1505 (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40))
1506 ni->ni_flags |= IEEE80211_NODE_SGI40;
1510 * Parse and update HT-related state extracted from
1511 * the HT cap and info ie's.
1514 ieee80211_ht_updateparams(struct ieee80211_node *ni,
1515 const uint8_t *htcapie, const uint8_t *htinfoie)
1517 struct ieee80211vap *vap = ni->ni_vap;
1518 const struct ieee80211_ie_htinfo *htinfo;
1521 ieee80211_parse_htcap(ni, htcapie);
1522 if (vap->iv_htcaps & IEEE80211_HTCAP_SMPS)
1523 htcap_update_mimo_ps(ni);
1524 htcap_update_shortgi(ni);
1526 if (htinfoie[0] == IEEE80211_ELEMID_VENDOR)
1528 htinfo = (const struct ieee80211_ie_htinfo *) htinfoie;
1529 htinfo_parse(ni, htinfo);
1531 htflags = (vap->iv_flags_ht & IEEE80211_FHT_HT) ?
1532 IEEE80211_CHAN_HT20 : 0;
1533 /* NB: honor operating mode constraint */
1534 if ((htinfo->hi_byte1 & IEEE80211_HTINFO_TXWIDTH_2040) &&
1535 (vap->iv_flags_ht & IEEE80211_FHT_USEHT40)) {
1536 if (ni->ni_ht2ndchan == IEEE80211_HTINFO_2NDCHAN_ABOVE)
1537 htflags = IEEE80211_CHAN_HT40U;
1538 else if (ni->ni_ht2ndchan == IEEE80211_HTINFO_2NDCHAN_BELOW)
1539 htflags = IEEE80211_CHAN_HT40D;
1541 htinfo_update_chw(ni, htflags);
1543 if ((htinfo->hi_byte1 & IEEE80211_HTINFO_RIFSMODE_PERM) &&
1544 (vap->iv_flags_ht & IEEE80211_FHT_RIFS))
1545 ni->ni_flags |= IEEE80211_NODE_RIFS;
1547 ni->ni_flags &= ~IEEE80211_NODE_RIFS;
1551 * Parse and update HT-related state extracted from the HT cap ie
1552 * for a station joining an HT BSS.
1555 ieee80211_ht_updatehtcap(struct ieee80211_node *ni, const uint8_t *htcapie)
1557 struct ieee80211vap *vap = ni->ni_vap;
1560 ieee80211_parse_htcap(ni, htcapie);
1561 if (vap->iv_htcaps & IEEE80211_HTCAP_SMPS)
1562 htcap_update_mimo_ps(ni);
1563 htcap_update_shortgi(ni);
1565 /* NB: honor operating mode constraint */
1566 /* XXX 40 MHz intolerant */
1567 htflags = (vap->iv_flags_ht & IEEE80211_FHT_HT) ?
1568 IEEE80211_CHAN_HT20 : 0;
1569 if ((ni->ni_htcap & IEEE80211_HTCAP_CHWIDTH40) &&
1570 (vap->iv_flags_ht & IEEE80211_FHT_USEHT40)) {
1571 if (IEEE80211_IS_CHAN_HT40U(vap->iv_bss->ni_chan))
1572 htflags = IEEE80211_CHAN_HT40U;
1573 else if (IEEE80211_IS_CHAN_HT40D(vap->iv_bss->ni_chan))
1574 htflags = IEEE80211_CHAN_HT40D;
1576 htinfo_update_chw(ni, htflags);
1580 * Install received HT rate set by parsing the HT cap ie.
1583 ieee80211_setup_htrates(struct ieee80211_node *ni, const uint8_t *ie, int flags)
1585 struct ieee80211com *ic = ni->ni_ic;
1586 struct ieee80211vap *vap = ni->ni_vap;
1587 const struct ieee80211_ie_htcap *htcap;
1588 struct ieee80211_htrateset *rs;
1589 int i, maxequalmcs, maxunequalmcs;
1591 maxequalmcs = ic->ic_txstream * 8 - 1;
1592 if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL) {
1593 if (ic->ic_txstream >= 2)
1595 if (ic->ic_txstream >= 3)
1597 if (ic->ic_txstream >= 4)
1602 rs = &ni->ni_htrates;
1603 memset(rs, 0, sizeof(*rs));
1605 if (ie[0] == IEEE80211_ELEMID_VENDOR)
1607 htcap = (const struct ieee80211_ie_htcap *) ie;
1608 for (i = 0; i < IEEE80211_HTRATE_MAXSIZE; i++) {
1609 if (isclr(htcap->hc_mcsset, i))
1611 if (rs->rs_nrates == IEEE80211_HTRATE_MAXSIZE) {
1613 IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni,
1614 "WARNING, HT rate set too large; only "
1615 "using %u rates", IEEE80211_HTRATE_MAXSIZE);
1616 vap->iv_stats.is_rx_rstoobig++;
1619 if (i <= 31 && i > maxequalmcs)
1622 (ic->ic_htcaps & IEEE80211_HTC_TXMCS32) == 0)
1624 if (i > 32 && i > maxunequalmcs)
1626 rs->rs_rates[rs->rs_nrates++] = i;
1629 return ieee80211_fix_rate(ni, (struct ieee80211_rateset *) rs, flags);
1633 * Mark rates in a node's HT rate set as basic according
1634 * to the information in the supplied HT info ie.
1637 ieee80211_setup_basic_htrates(struct ieee80211_node *ni, const uint8_t *ie)
1639 const struct ieee80211_ie_htinfo *htinfo;
1640 struct ieee80211_htrateset *rs;
1643 if (ie[0] == IEEE80211_ELEMID_VENDOR)
1645 htinfo = (const struct ieee80211_ie_htinfo *) ie;
1646 rs = &ni->ni_htrates;
1647 if (rs->rs_nrates == 0) {
1648 IEEE80211_NOTE(ni->ni_vap,
1649 IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni,
1650 "%s", "WARNING, empty HT rate set");
1653 for (i = 0; i < IEEE80211_HTRATE_MAXSIZE; i++) {
1654 if (isclr(htinfo->hi_basicmcsset, i))
1656 for (j = 0; j < rs->rs_nrates; j++)
1657 if ((rs->rs_rates[j] & IEEE80211_RATE_VAL) == i)
1658 rs->rs_rates[j] |= IEEE80211_RATE_BASIC;
1663 ampdu_tx_setup(struct ieee80211_tx_ampdu *tap)
1665 callout_init(&tap->txa_timer, CALLOUT_MPSAFE);
1666 tap->txa_flags |= IEEE80211_AGGR_SETUP;
1670 ampdu_tx_stop(struct ieee80211_tx_ampdu *tap)
1672 struct ieee80211_node *ni = tap->txa_ni;
1673 struct ieee80211com *ic = ni->ni_ic;
1675 KASSERT(tap->txa_flags & IEEE80211_AGGR_SETUP,
1676 ("txa_flags 0x%x ac %d", tap->txa_flags, tap->txa_ac));
1679 * Stop BA stream if setup so driver has a chance
1680 * to reclaim any resources it might have allocated.
1682 ic->ic_addba_stop(ni, tap);
1684 * Stop any pending BAR transmit.
1686 bar_stop_timer(tap);
1688 tap->txa_lastsample = 0;
1689 tap->txa_avgpps = 0;
1690 /* NB: clearing NAK means we may re-send ADDBA */
1691 tap->txa_flags &= ~(IEEE80211_AGGR_SETUP | IEEE80211_AGGR_NAK);
1695 addba_timeout(void *arg)
1697 struct ieee80211_tx_ampdu *tap = arg;
1700 tap->txa_flags &= ~IEEE80211_AGGR_XCHGPEND;
1701 tap->txa_attempts++;
1705 addba_start_timeout(struct ieee80211_tx_ampdu *tap)
1707 /* XXX use CALLOUT_PENDING instead? */
1708 callout_reset(&tap->txa_timer, ieee80211_addba_timeout,
1709 addba_timeout, tap);
1710 tap->txa_flags |= IEEE80211_AGGR_XCHGPEND;
1711 tap->txa_nextrequest = ticks + ieee80211_addba_timeout;
1715 addba_stop_timeout(struct ieee80211_tx_ampdu *tap)
1717 /* XXX use CALLOUT_PENDING instead? */
1718 if (tap->txa_flags & IEEE80211_AGGR_XCHGPEND) {
1719 callout_stop(&tap->txa_timer);
1720 tap->txa_flags &= ~IEEE80211_AGGR_XCHGPEND;
1725 * Default method for requesting A-MPDU tx aggregation.
1726 * We setup the specified state block and start a timer
1727 * to wait for an ADDBA response frame.
1730 ieee80211_addba_request(struct ieee80211_node *ni,
1731 struct ieee80211_tx_ampdu *tap,
1732 int dialogtoken, int baparamset, int batimeout)
1737 tap->txa_token = dialogtoken;
1738 tap->txa_flags |= IEEE80211_AGGR_IMMEDIATE;
1739 bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ);
1740 tap->txa_wnd = (bufsiz == 0) ?
1741 IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX);
1742 addba_start_timeout(tap);
1747 * Default method for processing an A-MPDU tx aggregation
1748 * response. We shutdown any pending timer and update the
1749 * state block according to the reply.
1752 ieee80211_addba_response(struct ieee80211_node *ni,
1753 struct ieee80211_tx_ampdu *tap,
1754 int status, int baparamset, int batimeout)
1759 addba_stop_timeout(tap);
1760 if (status == IEEE80211_STATUS_SUCCESS) {
1761 bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ);
1762 /* XXX override our request? */
1763 tap->txa_wnd = (bufsiz == 0) ?
1764 IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX);
1766 tid = MS(baparamset, IEEE80211_BAPS_TID);
1767 tap->txa_flags |= IEEE80211_AGGR_RUNNING;
1768 tap->txa_attempts = 0;
1770 /* mark tid so we don't try again */
1771 tap->txa_flags |= IEEE80211_AGGR_NAK;
1777 * Default method for stopping A-MPDU tx aggregation.
1778 * Any timer is cleared and we drain any pending frames.
1781 ieee80211_addba_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap)
1784 addba_stop_timeout(tap);
1785 if (tap->txa_flags & IEEE80211_AGGR_RUNNING) {
1786 /* XXX clear aggregation queue */
1787 tap->txa_flags &= ~IEEE80211_AGGR_RUNNING;
1789 tap->txa_attempts = 0;
1793 * Process a received action frame using the default aggregation
1794 * policy. We intercept ADDBA-related frames and use them to
1795 * update our aggregation state. All other frames are passed up
1796 * for processing by ieee80211_recv_action.
1799 ht_recv_action_ba_addba_request(struct ieee80211_node *ni,
1800 const struct ieee80211_frame *wh,
1801 const uint8_t *frm, const uint8_t *efrm)
1803 struct ieee80211com *ic = ni->ni_ic;
1804 struct ieee80211vap *vap = ni->ni_vap;
1805 struct ieee80211_rx_ampdu *rap;
1806 uint8_t dialogtoken;
1807 uint16_t baparamset, batimeout, baseqctl;
1811 dialogtoken = frm[2];
1812 baparamset = LE_READ_2(frm+3);
1813 batimeout = LE_READ_2(frm+5);
1814 baseqctl = LE_READ_2(frm+7);
1816 tid = MS(baparamset, IEEE80211_BAPS_TID);
1818 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
1819 "recv ADDBA request: dialogtoken %u baparamset 0x%x "
1820 "(tid %d bufsiz %d) batimeout %d baseqctl %d:%d",
1821 dialogtoken, baparamset,
1822 tid, MS(baparamset, IEEE80211_BAPS_BUFSIZ),
1824 MS(baseqctl, IEEE80211_BASEQ_START),
1825 MS(baseqctl, IEEE80211_BASEQ_FRAG));
1827 rap = &ni->ni_rx_ampdu[tid];
1829 /* Send ADDBA response */
1830 args[0] = dialogtoken;
1832 * NB: We ack only if the sta associated with HT and
1833 * the ap is configured to do AMPDU rx (the latter
1834 * violates the 11n spec and is mostly for testing).
1836 if ((ni->ni_flags & IEEE80211_NODE_AMPDU_RX) &&
1837 (vap->iv_flags_ht & IEEE80211_FHT_AMPDU_RX)) {
1838 /* XXX handle ampdu_rx_start failure */
1839 ic->ic_ampdu_rx_start(ni, rap,
1840 baparamset, batimeout, baseqctl);
1842 args[1] = IEEE80211_STATUS_SUCCESS;
1844 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
1845 ni, "reject ADDBA request: %s",
1846 ni->ni_flags & IEEE80211_NODE_AMPDU_RX ?
1847 "administratively disabled" :
1848 "not negotiated for station");
1849 vap->iv_stats.is_addba_reject++;
1850 args[1] = IEEE80211_STATUS_UNSPECIFIED;
1852 /* XXX honor rap flags? */
1853 args[2] = IEEE80211_BAPS_POLICY_IMMEDIATE
1854 | SM(tid, IEEE80211_BAPS_TID)
1855 | SM(rap->rxa_wnd, IEEE80211_BAPS_BUFSIZ)
1859 ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA,
1860 IEEE80211_ACTION_BA_ADDBA_RESPONSE, args);
1865 ht_recv_action_ba_addba_response(struct ieee80211_node *ni,
1866 const struct ieee80211_frame *wh,
1867 const uint8_t *frm, const uint8_t *efrm)
1869 struct ieee80211com *ic = ni->ni_ic;
1870 struct ieee80211vap *vap = ni->ni_vap;
1871 struct ieee80211_tx_ampdu *tap;
1872 uint8_t dialogtoken, policy;
1873 uint16_t baparamset, batimeout, code;
1874 int tid, ac, bufsiz;
1876 dialogtoken = frm[2];
1877 code = LE_READ_2(frm+3);
1878 baparamset = LE_READ_2(frm+5);
1879 tid = MS(baparamset, IEEE80211_BAPS_TID);
1880 bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ);
1881 policy = MS(baparamset, IEEE80211_BAPS_POLICY);
1882 batimeout = LE_READ_2(frm+7);
1884 ac = TID_TO_WME_AC(tid);
1885 tap = &ni->ni_tx_ampdu[ac];
1886 if ((tap->txa_flags & IEEE80211_AGGR_XCHGPEND) == 0) {
1887 IEEE80211_DISCARD_MAC(vap,
1888 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
1889 ni->ni_macaddr, "ADDBA response",
1890 "no pending ADDBA, tid %d dialogtoken %u "
1891 "code %d", tid, dialogtoken, code);
1892 vap->iv_stats.is_addba_norequest++;
1895 if (dialogtoken != tap->txa_token) {
1896 IEEE80211_DISCARD_MAC(vap,
1897 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
1898 ni->ni_macaddr, "ADDBA response",
1899 "dialogtoken mismatch: waiting for %d, "
1900 "received %d, tid %d code %d",
1901 tap->txa_token, dialogtoken, tid, code);
1902 vap->iv_stats.is_addba_badtoken++;
1905 /* NB: assumes IEEE80211_AGGR_IMMEDIATE is 1 */
1906 if (policy != (tap->txa_flags & IEEE80211_AGGR_IMMEDIATE)) {
1907 IEEE80211_DISCARD_MAC(vap,
1908 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
1909 ni->ni_macaddr, "ADDBA response",
1910 "policy mismatch: expecting %s, "
1911 "received %s, tid %d code %d",
1912 tap->txa_flags & IEEE80211_AGGR_IMMEDIATE,
1914 vap->iv_stats.is_addba_badpolicy++;
1918 /* XXX we take MIN in ieee80211_addba_response */
1919 if (bufsiz > IEEE80211_AGGR_BAWMAX) {
1920 IEEE80211_DISCARD_MAC(vap,
1921 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
1922 ni->ni_macaddr, "ADDBA response",
1923 "BA window too large: max %d, "
1924 "received %d, tid %d code %d",
1925 bufsiz, IEEE80211_AGGR_BAWMAX, tid, code);
1926 vap->iv_stats.is_addba_badbawinsize++;
1930 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
1931 "recv ADDBA response: dialogtoken %u code %d "
1932 "baparamset 0x%x (tid %d bufsiz %d) batimeout %d",
1933 dialogtoken, code, baparamset, tid, bufsiz,
1935 ic->ic_addba_response(ni, tap, code, baparamset, batimeout);
1940 ht_recv_action_ba_delba(struct ieee80211_node *ni,
1941 const struct ieee80211_frame *wh,
1942 const uint8_t *frm, const uint8_t *efrm)
1944 struct ieee80211com *ic = ni->ni_ic;
1945 struct ieee80211_rx_ampdu *rap;
1946 struct ieee80211_tx_ampdu *tap;
1947 uint16_t baparamset, code;
1950 baparamset = LE_READ_2(frm+2);
1951 code = LE_READ_2(frm+4);
1953 tid = MS(baparamset, IEEE80211_DELBAPS_TID);
1955 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
1956 "recv DELBA: baparamset 0x%x (tid %d initiator %d) "
1957 "code %d", baparamset, tid,
1958 MS(baparamset, IEEE80211_DELBAPS_INIT), code);
1960 if ((baparamset & IEEE80211_DELBAPS_INIT) == 0) {
1961 ac = TID_TO_WME_AC(tid);
1962 tap = &ni->ni_tx_ampdu[ac];
1963 ic->ic_addba_stop(ni, tap);
1965 rap = &ni->ni_rx_ampdu[tid];
1966 ic->ic_ampdu_rx_stop(ni, rap);
1972 ht_recv_action_ht_txchwidth(struct ieee80211_node *ni,
1973 const struct ieee80211_frame *wh,
1974 const uint8_t *frm, const uint8_t *efrm)
1978 chw = (frm[2] == IEEE80211_A_HT_TXCHWIDTH_2040) ? 40 : 20;
1980 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
1981 "%s: HT txchwidth, width %d%s",
1982 __func__, chw, ni->ni_chw != chw ? "*" : "");
1983 if (chw != ni->ni_chw) {
1985 /* XXX notify on change */
1991 ht_recv_action_ht_mimopwrsave(struct ieee80211_node *ni,
1992 const struct ieee80211_frame *wh,
1993 const uint8_t *frm, const uint8_t *efrm)
1995 const struct ieee80211_action_ht_mimopowersave *mps =
1996 (const struct ieee80211_action_ht_mimopowersave *) frm;
1998 /* XXX check iv_htcaps */
1999 if (mps->am_control & IEEE80211_A_HT_MIMOPWRSAVE_ENA)
2000 ni->ni_flags |= IEEE80211_NODE_MIMO_PS;
2002 ni->ni_flags &= ~IEEE80211_NODE_MIMO_PS;
2003 if (mps->am_control & IEEE80211_A_HT_MIMOPWRSAVE_MODE)
2004 ni->ni_flags |= IEEE80211_NODE_MIMO_RTS;
2006 ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS;
2007 /* XXX notify on change */
2008 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2009 "%s: HT MIMO PS (%s%s)", __func__,
2010 (ni->ni_flags & IEEE80211_NODE_MIMO_PS) ? "on" : "off",
2011 (ni->ni_flags & IEEE80211_NODE_MIMO_RTS) ? "+rts" : ""
2017 * Transmit processing.
2021 * Check if A-MPDU should be requested/enabled for a stream.
2022 * We require a traffic rate above a per-AC threshold and we
2023 * also handle backoff from previous failed attempts.
2025 * Drivers may override this method to bring in information
2026 * such as link state conditions in making the decision.
2029 ieee80211_ampdu_enable(struct ieee80211_node *ni,
2030 struct ieee80211_tx_ampdu *tap)
2032 struct ieee80211vap *vap = ni->ni_vap;
2034 if (tap->txa_avgpps < vap->iv_ampdu_mintraffic[tap->txa_ac])
2036 /* XXX check rssi? */
2037 if (tap->txa_attempts >= ieee80211_addba_maxtries &&
2038 ticks < tap->txa_nextrequest) {
2040 * Don't retry too often; txa_nextrequest is set
2041 * to the minimum interval we'll retry after
2042 * ieee80211_addba_maxtries failed attempts are made.
2046 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni,
2047 "enable AMPDU on %s, avgpps %d pkts %d",
2048 ieee80211_wme_acnames[tap->txa_ac], tap->txa_avgpps, tap->txa_pkts);
2053 * Request A-MPDU tx aggregation. Setup local state and
2054 * issue an ADDBA request. BA use will only happen after
2055 * the other end replies with ADDBA response.
2058 ieee80211_ampdu_request(struct ieee80211_node *ni,
2059 struct ieee80211_tx_ampdu *tap)
2061 struct ieee80211com *ic = ni->ni_ic;
2063 int tid, dialogtoken;
2064 static int tokens = 0; /* XXX */
2067 if ((tap->txa_flags & IEEE80211_AGGR_SETUP) == 0) {
2068 /* do deferred setup of state */
2069 ampdu_tx_setup(tap);
2071 /* XXX hack for not doing proper locking */
2072 tap->txa_flags &= ~IEEE80211_AGGR_NAK;
2074 dialogtoken = (tokens+1) % 63; /* XXX */
2075 tid = WME_AC_TO_TID(tap->txa_ac);
2076 tap->txa_start = ni->ni_txseqs[tid];
2078 args[0] = dialogtoken;
2079 args[1] = 0; /* NB: status code not used */
2080 args[2] = IEEE80211_BAPS_POLICY_IMMEDIATE
2081 | SM(tid, IEEE80211_BAPS_TID)
2082 | SM(IEEE80211_AGGR_BAWMAX, IEEE80211_BAPS_BUFSIZ)
2084 args[3] = 0; /* batimeout */
2085 /* NB: do first so there's no race against reply */
2086 if (!ic->ic_addba_request(ni, tap, dialogtoken, args[2], args[3])) {
2087 /* unable to setup state, don't make request */
2088 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
2089 ni, "%s: could not setup BA stream for AC %d",
2090 __func__, tap->txa_ac);
2091 /* defer next try so we don't slam the driver with requests */
2092 tap->txa_attempts = ieee80211_addba_maxtries;
2093 /* NB: check in case driver wants to override */
2094 if (tap->txa_nextrequest <= ticks)
2095 tap->txa_nextrequest = ticks + ieee80211_addba_backoff;
2098 tokens = dialogtoken; /* allocate token */
2099 /* NB: after calling ic_addba_request so driver can set txa_start */
2100 args[4] = SM(tap->txa_start, IEEE80211_BASEQ_START)
2101 | SM(0, IEEE80211_BASEQ_FRAG)
2103 return ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA,
2104 IEEE80211_ACTION_BA_ADDBA_REQUEST, args);
2108 * Terminate an AMPDU tx stream. State is reclaimed
2109 * and the peer notified with a DelBA Action frame.
2112 ieee80211_ampdu_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap,
2115 struct ieee80211com *ic = ni->ni_ic;
2116 struct ieee80211vap *vap = ni->ni_vap;
2120 tap->txa_flags &= ~IEEE80211_AGGR_BARPEND;
2121 if (IEEE80211_AMPDU_RUNNING(tap)) {
2122 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
2123 ni, "%s: stop BA stream for AC %d (reason %d)",
2124 __func__, tap->txa_ac, reason);
2125 vap->iv_stats.is_ampdu_stop++;
2127 ic->ic_addba_stop(ni, tap);
2128 args[0] = WME_AC_TO_TID(tap->txa_ac);
2129 args[1] = IEEE80211_DELBAPS_INIT;
2130 args[2] = reason; /* XXX reason code */
2131 ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA,
2132 IEEE80211_ACTION_BA_DELBA, args);
2134 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N,
2135 ni, "%s: BA stream for AC %d not running (reason %d)",
2136 __func__, tap->txa_ac, reason);
2137 vap->iv_stats.is_ampdu_stop_failed++;
2142 bar_timeout(void *arg)
2144 struct ieee80211_tx_ampdu *tap = arg;
2145 struct ieee80211_node *ni = tap->txa_ni;
2147 KASSERT((tap->txa_flags & IEEE80211_AGGR_XCHGPEND) == 0,
2148 ("bar/addba collision, flags 0x%x", tap->txa_flags));
2150 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
2151 ni, "%s: tid %u flags 0x%x attempts %d", __func__,
2152 tap->txa_ac, tap->txa_flags, tap->txa_attempts);
2154 /* guard against race with bar_tx_complete */
2155 if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) == 0)
2158 if (tap->txa_attempts >= ieee80211_bar_maxtries)
2159 ieee80211_ampdu_stop(ni, tap, IEEE80211_REASON_TIMEOUT);
2161 ieee80211_send_bar(ni, tap, tap->txa_seqpending);
2165 bar_start_timer(struct ieee80211_tx_ampdu *tap)
2167 callout_reset(&tap->txa_timer, ieee80211_bar_timeout, bar_timeout, tap);
2171 bar_stop_timer(struct ieee80211_tx_ampdu *tap)
2173 callout_stop(&tap->txa_timer);
2177 bar_tx_complete(struct ieee80211_node *ni, void *arg, int status)
2179 struct ieee80211_tx_ampdu *tap = arg;
2181 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
2182 ni, "%s: tid %u flags 0x%x pending %d status %d",
2183 __func__, tap->txa_ac, tap->txa_flags,
2184 callout_pending(&tap->txa_timer), status);
2187 if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) &&
2188 callout_pending(&tap->txa_timer)) {
2189 struct ieee80211com *ic = ni->ni_ic;
2191 if (status) /* ACK'd */
2192 bar_stop_timer(tap);
2193 ic->ic_bar_response(ni, tap, status);
2194 /* NB: just let timer expire so we pace requests */
2199 ieee80211_bar_response(struct ieee80211_node *ni,
2200 struct ieee80211_tx_ampdu *tap, int status)
2203 if (status != 0) { /* got ACK */
2204 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N,
2205 ni, "BAR moves BA win <%u:%u> (%u frames) txseq %u tid %u",
2207 IEEE80211_SEQ_ADD(tap->txa_start, tap->txa_wnd-1),
2208 tap->txa_qframes, tap->txa_seqpending,
2209 WME_AC_TO_TID(tap->txa_ac));
2211 /* NB: timer already stopped in bar_tx_complete */
2212 tap->txa_start = tap->txa_seqpending;
2213 tap->txa_flags &= ~IEEE80211_AGGR_BARPEND;
2218 * Transmit a BAR frame to the specified node. The
2219 * BAR contents are drawn from the supplied aggregation
2220 * state associated with the node.
2222 * NB: we only handle immediate ACK w/ compressed bitmap.
2225 ieee80211_send_bar(struct ieee80211_node *ni,
2226 struct ieee80211_tx_ampdu *tap, ieee80211_seq seq)
2228 #define senderr(_x, _v) do { vap->iv_stats._v++; ret = _x; goto bad; } while (0)
2229 struct ieee80211vap *vap = ni->ni_vap;
2230 struct ieee80211com *ic = ni->ni_ic;
2231 struct ieee80211_frame_bar *bar;
2233 uint16_t barctl, barseqctl;
2237 if ((tap->txa_flags & IEEE80211_AGGR_RUNNING) == 0) {
2238 /* no ADDBA response, should not happen */
2243 bar_stop_timer(tap);
2245 ieee80211_ref_node(ni);
2247 m = ieee80211_getmgtframe(&frm, ic->ic_headroom, sizeof(*bar));
2249 senderr(ENOMEM, is_tx_nobuf);
2251 if (!ieee80211_add_callback(m, bar_tx_complete, tap)) {
2253 senderr(ENOMEM, is_tx_nobuf); /* XXX */
2257 bar = mtod(m, struct ieee80211_frame_bar *);
2258 bar->i_fc[0] = IEEE80211_FC0_VERSION_0 |
2259 IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_BAR;
2261 IEEE80211_ADDR_COPY(bar->i_ra, ni->ni_macaddr);
2262 IEEE80211_ADDR_COPY(bar->i_ta, vap->iv_myaddr);
2264 tid = WME_AC_TO_TID(tap->txa_ac);
2265 barctl = (tap->txa_flags & IEEE80211_AGGR_IMMEDIATE ?
2266 0 : IEEE80211_BAR_NOACK)
2267 | IEEE80211_BAR_COMP
2268 | SM(tid, IEEE80211_BAR_TID)
2270 barseqctl = SM(seq, IEEE80211_BAR_SEQ_START);
2271 /* NB: known to have proper alignment */
2272 bar->i_ctl = htole16(barctl);
2273 bar->i_seq = htole16(barseqctl);
2274 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_bar);
2276 M_WME_SETAC(m, WME_AC_VO);
2278 IEEE80211_NODE_STAT(ni, tx_mgmt); /* XXX tx_ctl? */
2281 /* init/bump attempts counter */
2282 if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) == 0)
2283 tap->txa_attempts = 1;
2285 tap->txa_attempts++;
2286 tap->txa_seqpending = seq;
2287 tap->txa_flags |= IEEE80211_AGGR_BARPEND;
2289 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_11N,
2290 ni, "send BAR: tid %u ctl 0x%x start %u (attempt %d)",
2291 tid, barctl, seq, tap->txa_attempts);
2293 ret = ic->ic_raw_xmit(ni, m, NULL);
2295 /* xmit failed, clear state flag */
2296 tap->txa_flags &= ~IEEE80211_AGGR_BARPEND;
2299 /* XXX hack against tx complete happening before timer is started */
2300 if (tap->txa_flags & IEEE80211_AGGR_BARPEND)
2301 bar_start_timer(tap);
2304 ieee80211_free_node(ni);
2310 ht_action_output(struct ieee80211_node *ni, struct mbuf *m)
2312 struct ieee80211_bpf_params params;
2314 memset(¶ms, 0, sizeof(params));
2315 params.ibp_pri = WME_AC_VO;
2316 params.ibp_rate0 = ni->ni_txparms->mgmtrate;
2317 /* NB: we know all frames are unicast */
2318 params.ibp_try0 = ni->ni_txparms->maxretry;
2319 params.ibp_power = ni->ni_txpower;
2320 return ieee80211_mgmt_output(ni, m, IEEE80211_FC0_SUBTYPE_ACTION,
2324 #define ADDSHORT(frm, v) do { \
2325 frm[0] = (v) & 0xff; \
2326 frm[1] = (v) >> 8; \
2331 * Send an action management frame. The arguments are stuff
2332 * into a frame without inspection; the caller is assumed to
2333 * prepare them carefully (e.g. based on the aggregation state).
2336 ht_send_action_ba_addba(struct ieee80211_node *ni,
2337 int category, int action, void *arg0)
2339 struct ieee80211vap *vap = ni->ni_vap;
2340 struct ieee80211com *ic = ni->ni_ic;
2341 uint16_t *args = arg0;
2345 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2346 "send ADDBA %s: dialogtoken %d status %d "
2347 "baparamset 0x%x (tid %d) batimeout 0x%x baseqctl 0x%x",
2348 (action == IEEE80211_ACTION_BA_ADDBA_REQUEST) ?
2349 "request" : "response",
2350 args[0], args[1], args[2], MS(args[2], IEEE80211_BAPS_TID),
2353 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2354 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2355 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2356 ieee80211_ref_node(ni);
2358 m = ieee80211_getmgtframe(&frm,
2359 ic->ic_headroom + sizeof(struct ieee80211_frame),
2360 sizeof(uint16_t) /* action+category */
2361 /* XXX may action payload */
2362 + sizeof(struct ieee80211_action_ba_addbaresponse)
2367 *frm++ = args[0]; /* dialog token */
2368 if (action == IEEE80211_ACTION_BA_ADDBA_RESPONSE)
2369 ADDSHORT(frm, args[1]); /* status code */
2370 ADDSHORT(frm, args[2]); /* baparamset */
2371 ADDSHORT(frm, args[3]); /* batimeout */
2372 if (action == IEEE80211_ACTION_BA_ADDBA_REQUEST)
2373 ADDSHORT(frm, args[4]); /* baseqctl */
2374 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2375 return ht_action_output(ni, m);
2377 vap->iv_stats.is_tx_nobuf++;
2378 ieee80211_free_node(ni);
2384 ht_send_action_ba_delba(struct ieee80211_node *ni,
2385 int category, int action, void *arg0)
2387 struct ieee80211vap *vap = ni->ni_vap;
2388 struct ieee80211com *ic = ni->ni_ic;
2389 uint16_t *args = arg0;
2391 uint16_t baparamset;
2394 baparamset = SM(args[0], IEEE80211_DELBAPS_TID)
2397 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2398 "send DELBA action: tid %d, initiator %d reason %d",
2399 args[0], args[1], args[2]);
2401 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2402 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2403 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2404 ieee80211_ref_node(ni);
2406 m = ieee80211_getmgtframe(&frm,
2407 ic->ic_headroom + sizeof(struct ieee80211_frame),
2408 sizeof(uint16_t) /* action+category */
2409 /* XXX may action payload */
2410 + sizeof(struct ieee80211_action_ba_addbaresponse)
2415 ADDSHORT(frm, baparamset);
2416 ADDSHORT(frm, args[2]); /* reason code */
2417 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2418 return ht_action_output(ni, m);
2420 vap->iv_stats.is_tx_nobuf++;
2421 ieee80211_free_node(ni);
2427 ht_send_action_ht_txchwidth(struct ieee80211_node *ni,
2428 int category, int action, void *arg0)
2430 struct ieee80211vap *vap = ni->ni_vap;
2431 struct ieee80211com *ic = ni->ni_ic;
2435 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni,
2436 "send HT txchwidth: width %d",
2437 IEEE80211_IS_CHAN_HT40(ni->ni_chan) ? 40 : 20);
2439 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE,
2440 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__,
2441 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1);
2442 ieee80211_ref_node(ni);
2444 m = ieee80211_getmgtframe(&frm,
2445 ic->ic_headroom + sizeof(struct ieee80211_frame),
2446 sizeof(uint16_t) /* action+category */
2447 /* XXX may action payload */
2448 + sizeof(struct ieee80211_action_ba_addbaresponse)
2453 *frm++ = IEEE80211_IS_CHAN_HT40(ni->ni_chan) ?
2454 IEEE80211_A_HT_TXCHWIDTH_2040 :
2455 IEEE80211_A_HT_TXCHWIDTH_20;
2456 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *);
2457 return ht_action_output(ni, m);
2459 vap->iv_stats.is_tx_nobuf++;
2460 ieee80211_free_node(ni);
2467 * Construct the MCS bit mask for inclusion in an HT capabilities
2468 * information element.
2471 ieee80211_set_mcsset(struct ieee80211com *ic, uint8_t *frm)
2476 KASSERT((ic->ic_rxstream > 0 && ic->ic_rxstream <= 4),
2477 ("ic_rxstream %d out of range", ic->ic_rxstream));
2478 KASSERT((ic->ic_txstream > 0 && ic->ic_txstream <= 4),
2479 ("ic_txstream %d out of range", ic->ic_txstream));
2481 for (i = 0; i < ic->ic_rxstream * 8; i++)
2483 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) &&
2484 (ic->ic_htcaps & IEEE80211_HTC_RXMCS32))
2486 if (ic->ic_htcaps & IEEE80211_HTC_RXUNEQUAL) {
2487 if (ic->ic_rxstream >= 2) {
2488 for (i = 33; i <= 38; i++)
2491 if (ic->ic_rxstream >= 3) {
2492 for (i = 39; i <= 52; i++)
2495 if (ic->ic_txstream >= 4) {
2496 for (i = 53; i <= 76; i++)
2501 if (ic->ic_rxstream != ic->ic_txstream) {
2502 txparams = 0x1; /* TX MCS set defined */
2503 txparams |= 0x2; /* TX RX MCS not equal */
2504 txparams |= (ic->ic_txstream - 1) << 2; /* num TX streams */
2505 if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL)
2506 txparams |= 0x16; /* TX unequal modulation sup */
2513 * Add body of an HTCAP information element.
2516 ieee80211_add_htcap_body(uint8_t *frm, struct ieee80211_node *ni)
2518 #define ADDSHORT(frm, v) do { \
2519 frm[0] = (v) & 0xff; \
2520 frm[1] = (v) >> 8; \
2523 struct ieee80211com *ic = ni->ni_ic;
2524 struct ieee80211vap *vap = ni->ni_vap;
2525 uint16_t caps, extcaps;
2528 /* HT capabilities */
2529 caps = vap->iv_htcaps & 0xffff;
2531 * Note channel width depends on whether we are operating as
2532 * a sta or not. When operating as a sta we are generating
2533 * a request based on our desired configuration. Otherwise
2534 * we are operational and the channel attributes identify
2535 * how we've been setup (which might be different if a fixed
2536 * channel is specified).
2538 if (vap->iv_opmode == IEEE80211_M_STA) {
2539 /* override 20/40 use based on config */
2540 if (vap->iv_flags_ht & IEEE80211_FHT_USEHT40)
2541 caps |= IEEE80211_HTCAP_CHWIDTH40;
2543 caps &= ~IEEE80211_HTCAP_CHWIDTH40;
2544 /* use advertised setting (XXX locally constraint) */
2545 rxmax = MS(ni->ni_htparam, IEEE80211_HTCAP_MAXRXAMPDU);
2546 density = MS(ni->ni_htparam, IEEE80211_HTCAP_MPDUDENSITY);
2549 * NB: Hardware might support HT40 on some but not all
2550 * channels. We can't determine this earlier because only
2551 * after association the channel is upgraded to HT based
2552 * on the negotiated capabilities.
2554 if (ni->ni_chan != IEEE80211_CHAN_ANYC &&
2555 findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT40U) == NULL &&
2556 findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT40D) == NULL)
2557 caps &= ~IEEE80211_HTCAP_CHWIDTH40;
2559 /* override 20/40 use based on current channel */
2560 if (IEEE80211_IS_CHAN_HT40(ni->ni_chan))
2561 caps |= IEEE80211_HTCAP_CHWIDTH40;
2563 caps &= ~IEEE80211_HTCAP_CHWIDTH40;
2564 rxmax = vap->iv_ampdu_rxmax;
2565 density = vap->iv_ampdu_density;
2567 /* adjust short GI based on channel and config */
2568 if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20) == 0)
2569 caps &= ~IEEE80211_HTCAP_SHORTGI20;
2570 if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40) == 0 ||
2571 (caps & IEEE80211_HTCAP_CHWIDTH40) == 0)
2572 caps &= ~IEEE80211_HTCAP_SHORTGI40;
2573 ADDSHORT(frm, caps);
2576 *frm = SM(rxmax, IEEE80211_HTCAP_MAXRXAMPDU)
2577 | SM(density, IEEE80211_HTCAP_MPDUDENSITY)
2581 /* pre-zero remainder of ie */
2582 memset(frm, 0, sizeof(struct ieee80211_ie_htcap) -
2583 __offsetof(struct ieee80211_ie_htcap, hc_mcsset));
2585 /* supported MCS set */
2587 * XXX: For sta mode the rate set should be restricted based
2588 * on the AP's capabilities, but ni_htrates isn't setup when
2589 * we're called to form an AssocReq frame so for now we're
2590 * restricted to the device capabilities.
2592 ieee80211_set_mcsset(ni->ni_ic, frm);
2594 frm += __offsetof(struct ieee80211_ie_htcap, hc_extcap) -
2595 __offsetof(struct ieee80211_ie_htcap, hc_mcsset);
2597 /* HT extended capabilities */
2598 extcaps = vap->iv_htextcaps & 0xffff;
2600 ADDSHORT(frm, extcaps);
2602 frm += sizeof(struct ieee80211_ie_htcap) -
2603 __offsetof(struct ieee80211_ie_htcap, hc_txbf);
2610 * Add 802.11n HT capabilities information element
2613 ieee80211_add_htcap(uint8_t *frm, struct ieee80211_node *ni)
2615 frm[0] = IEEE80211_ELEMID_HTCAP;
2616 frm[1] = sizeof(struct ieee80211_ie_htcap) - 2;
2617 return ieee80211_add_htcap_body(frm + 2, ni);
2621 * Add Broadcom OUI wrapped standard HTCAP ie; this is
2622 * used for compatibility w/ pre-draft implementations.
2625 ieee80211_add_htcap_vendor(uint8_t *frm, struct ieee80211_node *ni)
2627 frm[0] = IEEE80211_ELEMID_VENDOR;
2628 frm[1] = 4 + sizeof(struct ieee80211_ie_htcap) - 2;
2629 frm[2] = (BCM_OUI >> 0) & 0xff;
2630 frm[3] = (BCM_OUI >> 8) & 0xff;
2631 frm[4] = (BCM_OUI >> 16) & 0xff;
2632 frm[5] = BCM_OUI_HTCAP;
2633 return ieee80211_add_htcap_body(frm + 6, ni);
2637 * Construct the MCS bit mask of basic rates
2638 * for inclusion in an HT information element.
2641 ieee80211_set_basic_htrates(uint8_t *frm, const struct ieee80211_htrateset *rs)
2645 for (i = 0; i < rs->rs_nrates; i++) {
2646 int r = rs->rs_rates[i] & IEEE80211_RATE_VAL;
2647 if ((rs->rs_rates[i] & IEEE80211_RATE_BASIC) &&
2648 r < IEEE80211_HTRATE_MAXSIZE) {
2649 /* NB: this assumes a particular implementation */
2656 * Update the HTINFO ie for a beacon frame.
2659 ieee80211_ht_update_beacon(struct ieee80211vap *vap,
2660 struct ieee80211_beacon_offsets *bo)
2662 #define PROTMODE (IEEE80211_HTINFO_OPMODE|IEEE80211_HTINFO_NONHT_PRESENT)
2663 const struct ieee80211_channel *bsschan = vap->iv_bss->ni_chan;
2664 struct ieee80211com *ic = vap->iv_ic;
2665 struct ieee80211_ie_htinfo *ht =
2666 (struct ieee80211_ie_htinfo *) bo->bo_htinfo;
2668 /* XXX only update on channel change */
2669 ht->hi_ctrlchannel = ieee80211_chan2ieee(ic, bsschan);
2670 if (vap->iv_flags_ht & IEEE80211_FHT_RIFS)
2671 ht->hi_byte1 = IEEE80211_HTINFO_RIFSMODE_PERM;
2673 ht->hi_byte1 = IEEE80211_HTINFO_RIFSMODE_PROH;
2674 if (IEEE80211_IS_CHAN_HT40U(bsschan))
2675 ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_ABOVE;
2676 else if (IEEE80211_IS_CHAN_HT40D(bsschan))
2677 ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_BELOW;
2679 ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_NONE;
2680 if (IEEE80211_IS_CHAN_HT40(bsschan))
2681 ht->hi_byte1 |= IEEE80211_HTINFO_TXWIDTH_2040;
2683 /* protection mode */
2684 ht->hi_byte2 = (ht->hi_byte2 &~ PROTMODE) | ic->ic_curhtprotmode;
2686 /* XXX propagate to vendor ie's */
2691 * Add body of an HTINFO information element.
2693 * NB: We don't use struct ieee80211_ie_htinfo because we can
2694 * be called to fillin both a standard ie and a compat ie that
2695 * has a vendor OUI at the front.
2698 ieee80211_add_htinfo_body(uint8_t *frm, struct ieee80211_node *ni)
2700 struct ieee80211vap *vap = ni->ni_vap;
2701 struct ieee80211com *ic = ni->ni_ic;
2703 /* pre-zero remainder of ie */
2704 memset(frm, 0, sizeof(struct ieee80211_ie_htinfo) - 2);
2706 /* primary/control channel center */
2707 *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan);
2709 if (vap->iv_flags_ht & IEEE80211_FHT_RIFS)
2710 frm[0] = IEEE80211_HTINFO_RIFSMODE_PERM;
2712 frm[0] = IEEE80211_HTINFO_RIFSMODE_PROH;
2713 if (IEEE80211_IS_CHAN_HT40U(ni->ni_chan))
2714 frm[0] |= IEEE80211_HTINFO_2NDCHAN_ABOVE;
2715 else if (IEEE80211_IS_CHAN_HT40D(ni->ni_chan))
2716 frm[0] |= IEEE80211_HTINFO_2NDCHAN_BELOW;
2718 frm[0] |= IEEE80211_HTINFO_2NDCHAN_NONE;
2719 if (IEEE80211_IS_CHAN_HT40(ni->ni_chan))
2720 frm[0] |= IEEE80211_HTINFO_TXWIDTH_2040;
2722 frm[1] = ic->ic_curhtprotmode;
2727 ieee80211_set_basic_htrates(frm, &ni->ni_htrates);
2728 frm += sizeof(struct ieee80211_ie_htinfo) -
2729 __offsetof(struct ieee80211_ie_htinfo, hi_basicmcsset);
2734 * Add 802.11n HT information information element.
2737 ieee80211_add_htinfo(uint8_t *frm, struct ieee80211_node *ni)
2739 frm[0] = IEEE80211_ELEMID_HTINFO;
2740 frm[1] = sizeof(struct ieee80211_ie_htinfo) - 2;
2741 return ieee80211_add_htinfo_body(frm + 2, ni);
2745 * Add Broadcom OUI wrapped standard HTINFO ie; this is
2746 * used for compatibility w/ pre-draft implementations.
2749 ieee80211_add_htinfo_vendor(uint8_t *frm, struct ieee80211_node *ni)
2751 frm[0] = IEEE80211_ELEMID_VENDOR;
2752 frm[1] = 4 + sizeof(struct ieee80211_ie_htinfo) - 2;
2753 frm[2] = (BCM_OUI >> 0) & 0xff;
2754 frm[3] = (BCM_OUI >> 8) & 0xff;
2755 frm[4] = (BCM_OUI >> 16) & 0xff;
2756 frm[5] = BCM_OUI_HTINFO;
2757 return ieee80211_add_htinfo_body(frm + 6, ni);