ieee80211_ht.c revision 225736
1/*- 2 * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 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. 13 * 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. 24 */ 25 26#include <sys/cdefs.h> 27#ifdef __FreeBSD__ 28__FBSDID("$FreeBSD: stable/9/sys/net80211/ieee80211_ht.c 225013 2011-08-19 15:21:13Z adrian $"); 29#endif 30 31/* 32 * IEEE 802.11n protocol support. 33 */ 34 35#include "opt_inet.h" 36#include "opt_wlan.h" 37 38#include <sys/param.h> 39#include <sys/kernel.h> 40#include <sys/systm.h> 41#include <sys/endian.h> 42 43#include <sys/socket.h> 44 45#include <net/if.h> 46#include <net/if_media.h> 47#include <net/ethernet.h> 48 49#include <net80211/ieee80211_var.h> 50#include <net80211/ieee80211_action.h> 51#include <net80211/ieee80211_input.h> 52 53/* define here, used throughout file */ 54#define MS(_v, _f) (((_v) & _f) >> _f##_S) 55#define SM(_v, _f) (((_v) << _f##_S) & _f) 56 57const 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 */ 135}; 136 137#ifdef IEEE80211_AMPDU_AGE 138static int ieee80211_ampdu_age = -1; /* threshold for ampdu reorder q (ms) */ 139SYSCTL_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)"); 142#endif 143 144static int ieee80211_recv_bar_ena = 1; 145SYSCTL_INT(_net_wlan, OID_AUTO, recv_bar, CTLFLAG_RW, &ieee80211_recv_bar_ena, 146 0, "BAR frame processing (ena/dis)"); 147 148static int ieee80211_addba_timeout = -1;/* timeout for ADDBA response */ 149SYSCTL_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)"); 152static int ieee80211_addba_backoff = -1;/* backoff after max ADDBA requests */ 153SYSCTL_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)"); 156static int ieee80211_addba_maxtries = 3;/* max ADDBA requests before backoff */ 157SYSCTL_INT(_net_wlan, OID_AUTO, addba_maxtries, CTLTYPE_INT | CTLFLAG_RW, 158 &ieee80211_addba_maxtries, 0, "max ADDBA requests sent before backoff"); 159 160static int ieee80211_bar_timeout = -1; /* timeout waiting for BAR response */ 161static int ieee80211_bar_maxtries = 50;/* max BAR requests before DELBA */ 162 163static ieee80211_recv_action_func ht_recv_action_ba_addba_request; 164static ieee80211_recv_action_func ht_recv_action_ba_addba_response; 165static ieee80211_recv_action_func ht_recv_action_ba_delba; 166static ieee80211_recv_action_func ht_recv_action_ht_mimopwrsave; 167static ieee80211_recv_action_func ht_recv_action_ht_txchwidth; 168 169static ieee80211_send_action_func ht_send_action_ba_addba; 170static ieee80211_send_action_func ht_send_action_ba_delba; 171static ieee80211_send_action_func ht_send_action_ht_txchwidth; 172 173static void 174ieee80211_ht_init(void) 175{ 176 /* 177 * Setup HT parameters that depends on the clock frequency. 178 */ 179#ifdef IEEE80211_AMPDU_AGE 180 ieee80211_ampdu_age = msecs_to_ticks(500); 181#endif 182 ieee80211_addba_timeout = msecs_to_ticks(250); 183 ieee80211_addba_backoff = msecs_to_ticks(10*1000); 184 ieee80211_bar_timeout = msecs_to_ticks(250); 185 /* 186 * Register action frame handlers. 187 */ 188 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA, 189 IEEE80211_ACTION_BA_ADDBA_REQUEST, ht_recv_action_ba_addba_request); 190 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA, 191 IEEE80211_ACTION_BA_ADDBA_RESPONSE, ht_recv_action_ba_addba_response); 192 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA, 193 IEEE80211_ACTION_BA_DELBA, ht_recv_action_ba_delba); 194 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_HT, 195 IEEE80211_ACTION_HT_MIMOPWRSAVE, ht_recv_action_ht_mimopwrsave); 196 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_HT, 197 IEEE80211_ACTION_HT_TXCHWIDTH, ht_recv_action_ht_txchwidth); 198 199 ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA, 200 IEEE80211_ACTION_BA_ADDBA_REQUEST, ht_send_action_ba_addba); 201 ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA, 202 IEEE80211_ACTION_BA_ADDBA_RESPONSE, ht_send_action_ba_addba); 203 ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA, 204 IEEE80211_ACTION_BA_DELBA, ht_send_action_ba_delba); 205 ieee80211_send_action_register(IEEE80211_ACTION_CAT_HT, 206 IEEE80211_ACTION_HT_TXCHWIDTH, ht_send_action_ht_txchwidth); 207} 208SYSINIT(wlan_ht, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_ht_init, NULL); 209 210static int ieee80211_ampdu_enable(struct ieee80211_node *ni, 211 struct ieee80211_tx_ampdu *tap); 212static int ieee80211_addba_request(struct ieee80211_node *ni, 213 struct ieee80211_tx_ampdu *tap, 214 int dialogtoken, int baparamset, int batimeout); 215static int ieee80211_addba_response(struct ieee80211_node *ni, 216 struct ieee80211_tx_ampdu *tap, 217 int code, int baparamset, int batimeout); 218static void ieee80211_addba_stop(struct ieee80211_node *ni, 219 struct ieee80211_tx_ampdu *tap); 220static void null_addba_response_timeout(struct ieee80211_node *ni, 221 struct ieee80211_tx_ampdu *tap); 222 223static void ieee80211_bar_response(struct ieee80211_node *ni, 224 struct ieee80211_tx_ampdu *tap, int status); 225static void ampdu_tx_stop(struct ieee80211_tx_ampdu *tap); 226static void bar_stop_timer(struct ieee80211_tx_ampdu *tap); 227static int ampdu_rx_start(struct ieee80211_node *, struct ieee80211_rx_ampdu *, 228 int baparamset, int batimeout, int baseqctl); 229static void ampdu_rx_stop(struct ieee80211_node *, struct ieee80211_rx_ampdu *); 230 231void 232ieee80211_ht_attach(struct ieee80211com *ic) 233{ 234 /* setup default aggregation policy */ 235 ic->ic_recv_action = ieee80211_recv_action; 236 ic->ic_send_action = ieee80211_send_action; 237 ic->ic_ampdu_enable = ieee80211_ampdu_enable; 238 ic->ic_addba_request = ieee80211_addba_request; 239 ic->ic_addba_response = ieee80211_addba_response; 240 ic->ic_addba_response_timeout = null_addba_response_timeout; 241 ic->ic_addba_stop = ieee80211_addba_stop; 242 ic->ic_bar_response = ieee80211_bar_response; 243 ic->ic_ampdu_rx_start = ampdu_rx_start; 244 ic->ic_ampdu_rx_stop = ampdu_rx_stop; 245 246 ic->ic_htprotmode = IEEE80211_PROT_RTSCTS; 247 ic->ic_curhtprotmode = IEEE80211_HTINFO_OPMODE_PURE; 248} 249 250void 251ieee80211_ht_detach(struct ieee80211com *ic) 252{ 253} 254 255void 256ieee80211_ht_vattach(struct ieee80211vap *vap) 257{ 258 259 /* driver can override defaults */ 260 vap->iv_ampdu_rxmax = IEEE80211_HTCAP_MAXRXAMPDU_8K; 261 vap->iv_ampdu_density = IEEE80211_HTCAP_MPDUDENSITY_NA; 262 vap->iv_ampdu_limit = vap->iv_ampdu_rxmax; 263 vap->iv_amsdu_limit = vap->iv_htcaps & IEEE80211_HTCAP_MAXAMSDU; 264 /* tx aggregation traffic thresholds */ 265 vap->iv_ampdu_mintraffic[WME_AC_BK] = 128; 266 vap->iv_ampdu_mintraffic[WME_AC_BE] = 64; 267 vap->iv_ampdu_mintraffic[WME_AC_VO] = 32; 268 vap->iv_ampdu_mintraffic[WME_AC_VI] = 32; 269 270 if (vap->iv_htcaps & IEEE80211_HTC_HT) { 271 /* 272 * Device is HT capable; enable all HT-related 273 * facilities by default. 274 * XXX these choices may be too aggressive. 275 */ 276 vap->iv_flags_ht |= IEEE80211_FHT_HT 277 | IEEE80211_FHT_HTCOMPAT 278 ; 279 if (vap->iv_htcaps & IEEE80211_HTCAP_SHORTGI20) 280 vap->iv_flags_ht |= IEEE80211_FHT_SHORTGI20; 281 /* XXX infer from channel list? */ 282 if (vap->iv_htcaps & IEEE80211_HTCAP_CHWIDTH40) { 283 vap->iv_flags_ht |= IEEE80211_FHT_USEHT40; 284 if (vap->iv_htcaps & IEEE80211_HTCAP_SHORTGI40) 285 vap->iv_flags_ht |= IEEE80211_FHT_SHORTGI40; 286 } 287 /* enable RIFS if capable */ 288 if (vap->iv_htcaps & IEEE80211_HTC_RIFS) 289 vap->iv_flags_ht |= IEEE80211_FHT_RIFS; 290 291 /* NB: A-MPDU and A-MSDU rx are mandated, these are tx only */ 292 vap->iv_flags_ht |= IEEE80211_FHT_AMPDU_RX; 293 if (vap->iv_htcaps & IEEE80211_HTC_AMPDU) 294 vap->iv_flags_ht |= IEEE80211_FHT_AMPDU_TX; 295 vap->iv_flags_ht |= IEEE80211_FHT_AMSDU_RX; 296 if (vap->iv_htcaps & IEEE80211_HTC_AMSDU) 297 vap->iv_flags_ht |= IEEE80211_FHT_AMSDU_TX; 298 } 299 /* NB: disable default legacy WDS, too many issues right now */ 300 if (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) 301 vap->iv_flags_ht &= ~IEEE80211_FHT_HT; 302} 303 304void 305ieee80211_ht_vdetach(struct ieee80211vap *vap) 306{ 307} 308 309static int 310ht_getrate(struct ieee80211com *ic, int index, int mode, int ratetype) 311{ 312 int mword, rate; 313 314 mword = ieee80211_rate2media(ic, index | IEEE80211_RATE_MCS, mode); 315 if (IFM_SUBTYPE(mword) != IFM_IEEE80211_MCS) 316 return (0); 317 switch (ratetype) { 318 case 0: 319 rate = ieee80211_htrates[index].ht20_rate_800ns; 320 break; 321 case 1: 322 rate = ieee80211_htrates[index].ht20_rate_400ns; 323 break; 324 case 2: 325 rate = ieee80211_htrates[index].ht40_rate_800ns; 326 break; 327 default: 328 rate = ieee80211_htrates[index].ht40_rate_400ns; 329 break; 330 } 331 return (rate); 332} 333 334static struct printranges { 335 int minmcs; 336 int maxmcs; 337 int txstream; 338 int ratetype; 339 int htcapflags; 340} ranges[] = { 341 { 0, 7, 1, 0, 0 }, 342 { 8, 15, 2, 0, 0 }, 343 { 16, 23, 3, 0, 0 }, 344 { 24, 31, 4, 0, 0 }, 345 { 32, 0, 1, 2, IEEE80211_HTC_TXMCS32 }, 346 { 33, 38, 2, 0, IEEE80211_HTC_TXUNEQUAL }, 347 { 39, 52, 3, 0, IEEE80211_HTC_TXUNEQUAL }, 348 { 53, 76, 4, 0, IEEE80211_HTC_TXUNEQUAL }, 349 { 0, 0, 0, 0, 0 }, 350}; 351 352static void 353ht_rateprint(struct ieee80211com *ic, int mode, int ratetype) 354{ 355 struct ifnet *ifp = ic->ic_ifp; 356 int minrate, maxrate; 357 struct printranges *range; 358 359 for (range = ranges; range->txstream != 0; range++) { 360 if (ic->ic_txstream < range->txstream) 361 continue; 362 if (range->htcapflags && 363 (ic->ic_htcaps & range->htcapflags) == 0) 364 continue; 365 if (ratetype < range->ratetype) 366 continue; 367 minrate = ht_getrate(ic, range->minmcs, mode, ratetype); 368 maxrate = ht_getrate(ic, range->maxmcs, mode, ratetype); 369 if (range->maxmcs) { 370 if_printf(ifp, "MCS %d-%d: %d%sMbps - %d%sMbps\n", 371 range->minmcs, range->maxmcs, 372 minrate/2, ((minrate & 0x1) != 0 ? ".5" : ""), 373 maxrate/2, ((maxrate & 0x1) != 0 ? ".5" : "")); 374 } else { 375 if_printf(ifp, "MCS %d: %d%sMbps\n", range->minmcs, 376 minrate/2, ((minrate & 0x1) != 0 ? ".5" : "")); 377 } 378 } 379} 380 381static void 382ht_announce(struct ieee80211com *ic, int mode) 383{ 384 struct ifnet *ifp = ic->ic_ifp; 385 const char *modestr = ieee80211_phymode_name[mode]; 386 387 if_printf(ifp, "%s MCS 20MHz\n", modestr); 388 ht_rateprint(ic, mode, 0); 389 if (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20) { 390 if_printf(ifp, "%s MCS 20MHz SGI\n", modestr); 391 ht_rateprint(ic, mode, 1); 392 } 393 if (ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) { 394 if_printf(ifp, "%s MCS 40MHz:\n", modestr); 395 ht_rateprint(ic, mode, 2); 396 } 397 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) && 398 (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40)) { 399 if_printf(ifp, "%s MCS 40MHz SGI:\n", modestr); 400 ht_rateprint(ic, mode, 3); 401 } 402} 403 404void 405ieee80211_ht_announce(struct ieee80211com *ic) 406{ 407 struct ifnet *ifp = ic->ic_ifp; 408 409 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) || 410 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) 411 if_printf(ifp, "%dT%dR\n", ic->ic_txstream, ic->ic_rxstream); 412 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA)) 413 ht_announce(ic, IEEE80211_MODE_11NA); 414 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) 415 ht_announce(ic, IEEE80211_MODE_11NG); 416} 417 418static struct ieee80211_htrateset htrateset; 419 420const struct ieee80211_htrateset * 421ieee80211_get_suphtrates(struct ieee80211com *ic, 422 const struct ieee80211_channel *c) 423{ 424#define ADDRATE(x) do { \ 425 htrateset.rs_rates[htrateset.rs_nrates] = x; \ 426 htrateset.rs_nrates++; \ 427} while (0) 428 int i; 429 430 memset(&htrateset, 0, sizeof(struct ieee80211_htrateset)); 431 for (i = 0; i < ic->ic_txstream * 8; i++) 432 ADDRATE(i); 433 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) && 434 (ic->ic_htcaps & IEEE80211_HTC_TXMCS32)) 435 ADDRATE(i); 436 if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL) { 437 if (ic->ic_txstream >= 2) { 438 for (i = 33; i <= 38; i++) 439 ADDRATE(i); 440 } 441 if (ic->ic_txstream >= 3) { 442 for (i = 39; i <= 52; i++) 443 ADDRATE(i); 444 } 445 if (ic->ic_txstream == 4) { 446 for (i = 53; i <= 76; i++) 447 ADDRATE(i); 448 } 449 } 450 return &htrateset; 451#undef ADDRATE 452} 453 454/* 455 * Receive processing. 456 */ 457 458/* 459 * Decap the encapsulated A-MSDU frames and dispatch all but 460 * the last for delivery. The last frame is returned for 461 * delivery via the normal path. 462 */ 463struct mbuf * 464ieee80211_decap_amsdu(struct ieee80211_node *ni, struct mbuf *m) 465{ 466 struct ieee80211vap *vap = ni->ni_vap; 467 int framelen; 468 struct mbuf *n; 469 470 /* discard 802.3 header inserted by ieee80211_decap */ 471 m_adj(m, sizeof(struct ether_header)); 472 473 vap->iv_stats.is_amsdu_decap++; 474 475 for (;;) { 476 /* 477 * Decap the first frame, bust it apart from the 478 * remainder and deliver. We leave the last frame 479 * delivery to the caller (for consistency with other 480 * code paths, could also do it here). 481 */ 482 m = ieee80211_decap1(m, &framelen); 483 if (m == NULL) { 484 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 485 ni->ni_macaddr, "a-msdu", "%s", "decap failed"); 486 vap->iv_stats.is_amsdu_tooshort++; 487 return NULL; 488 } 489 if (m->m_pkthdr.len == framelen) 490 break; 491 n = m_split(m, framelen, M_NOWAIT); 492 if (n == NULL) { 493 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 494 ni->ni_macaddr, "a-msdu", 495 "%s", "unable to split encapsulated frames"); 496 vap->iv_stats.is_amsdu_split++; 497 m_freem(m); /* NB: must reclaim */ 498 return NULL; 499 } 500 vap->iv_deliver_data(vap, ni, m); 501 502 /* 503 * Remove frame contents; each intermediate frame 504 * is required to be aligned to a 4-byte boundary. 505 */ 506 m = n; 507 m_adj(m, roundup2(framelen, 4) - framelen); /* padding */ 508 } 509 return m; /* last delivered by caller */ 510} 511 512/* 513 * Purge all frames in the A-MPDU re-order queue. 514 */ 515static void 516ampdu_rx_purge(struct ieee80211_rx_ampdu *rap) 517{ 518 struct mbuf *m; 519 int i; 520 521 for (i = 0; i < rap->rxa_wnd; i++) { 522 m = rap->rxa_m[i]; 523 if (m != NULL) { 524 rap->rxa_m[i] = NULL; 525 rap->rxa_qbytes -= m->m_pkthdr.len; 526 m_freem(m); 527 if (--rap->rxa_qframes == 0) 528 break; 529 } 530 } 531 KASSERT(rap->rxa_qbytes == 0 && rap->rxa_qframes == 0, 532 ("lost %u data, %u frames on ampdu rx q", 533 rap->rxa_qbytes, rap->rxa_qframes)); 534} 535 536/* 537 * Start A-MPDU rx/re-order processing for the specified TID. 538 */ 539static int 540ampdu_rx_start(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap, 541 int baparamset, int batimeout, int baseqctl) 542{ 543 int bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ); 544 545 if (rap->rxa_flags & IEEE80211_AGGR_RUNNING) { 546 /* 547 * AMPDU previously setup and not terminated with a DELBA, 548 * flush the reorder q's in case anything remains. 549 */ 550 ampdu_rx_purge(rap); 551 } 552 memset(rap, 0, sizeof(*rap)); 553 rap->rxa_wnd = (bufsiz == 0) ? 554 IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX); 555 rap->rxa_start = MS(baseqctl, IEEE80211_BASEQ_START); 556 rap->rxa_flags |= IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_XCHGPEND; 557 558 return 0; 559} 560 561/* 562 * Stop A-MPDU rx processing for the specified TID. 563 */ 564static void 565ampdu_rx_stop(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap) 566{ 567 568 ampdu_rx_purge(rap); 569 rap->rxa_flags &= ~(IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_XCHGPEND); 570} 571 572/* 573 * Dispatch a frame from the A-MPDU reorder queue. The 574 * frame is fed back into ieee80211_input marked with an 575 * M_AMPDU_MPDU flag so it doesn't come back to us (it also 576 * permits ieee80211_input to optimize re-processing). 577 */ 578static __inline void 579ampdu_dispatch(struct ieee80211_node *ni, struct mbuf *m) 580{ 581 m->m_flags |= M_AMPDU_MPDU; /* bypass normal processing */ 582 /* NB: rssi and noise are ignored w/ M_AMPDU_MPDU set */ 583 (void) ieee80211_input(ni, m, 0, 0); 584} 585 586/* 587 * Dispatch as many frames as possible from the re-order queue. 588 * Frames will always be "at the front"; we process all frames 589 * up to the first empty slot in the window. On completion we 590 * cleanup state if there are still pending frames in the current 591 * BA window. We assume the frame at slot 0 is already handled 592 * by the caller; we always start at slot 1. 593 */ 594static void 595ampdu_rx_dispatch(struct ieee80211_rx_ampdu *rap, struct ieee80211_node *ni) 596{ 597 struct ieee80211vap *vap = ni->ni_vap; 598 struct mbuf *m; 599 int i; 600 601 /* flush run of frames */ 602 for (i = 1; i < rap->rxa_wnd; i++) { 603 m = rap->rxa_m[i]; 604 if (m == NULL) 605 break; 606 rap->rxa_m[i] = NULL; 607 rap->rxa_qbytes -= m->m_pkthdr.len; 608 rap->rxa_qframes--; 609 610 ampdu_dispatch(ni, m); 611 } 612 /* 613 * If frames remain, copy the mbuf pointers down so 614 * they correspond to the offsets in the new window. 615 */ 616 if (rap->rxa_qframes != 0) { 617 int n = rap->rxa_qframes, j; 618 for (j = i+1; j < rap->rxa_wnd; j++) { 619 if (rap->rxa_m[j] != NULL) { 620 rap->rxa_m[j-i] = rap->rxa_m[j]; 621 rap->rxa_m[j] = NULL; 622 if (--n == 0) 623 break; 624 } 625 } 626 KASSERT(n == 0, ("lost %d frames", n)); 627 vap->iv_stats.is_ampdu_rx_copy += rap->rxa_qframes; 628 } 629 /* 630 * Adjust the start of the BA window to 631 * reflect the frames just dispatched. 632 */ 633 rap->rxa_start = IEEE80211_SEQ_ADD(rap->rxa_start, i); 634 vap->iv_stats.is_ampdu_rx_oor += i; 635} 636 637#ifdef IEEE80211_AMPDU_AGE 638/* 639 * Dispatch all frames in the A-MPDU re-order queue. 640 */ 641static void 642ampdu_rx_flush(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap) 643{ 644 struct ieee80211vap *vap = ni->ni_vap; 645 struct mbuf *m; 646 int i; 647 648 for (i = 0; i < rap->rxa_wnd; i++) { 649 m = rap->rxa_m[i]; 650 if (m == NULL) 651 continue; 652 rap->rxa_m[i] = NULL; 653 rap->rxa_qbytes -= m->m_pkthdr.len; 654 rap->rxa_qframes--; 655 vap->iv_stats.is_ampdu_rx_oor++; 656 657 ampdu_dispatch(ni, m); 658 if (rap->rxa_qframes == 0) 659 break; 660 } 661} 662#endif /* IEEE80211_AMPDU_AGE */ 663 664/* 665 * Dispatch all frames in the A-MPDU re-order queue 666 * preceding the specified sequence number. This logic 667 * handles window moves due to a received MSDU or BAR. 668 */ 669static void 670ampdu_rx_flush_upto(struct ieee80211_node *ni, 671 struct ieee80211_rx_ampdu *rap, ieee80211_seq winstart) 672{ 673 struct ieee80211vap *vap = ni->ni_vap; 674 struct mbuf *m; 675 ieee80211_seq seqno; 676 int i; 677 678 /* 679 * Flush any complete MSDU's with a sequence number lower 680 * than winstart. Gaps may exist. Note that we may actually 681 * dispatch frames past winstart if a run continues; this is 682 * an optimization that avoids having to do a separate pass 683 * to dispatch frames after moving the BA window start. 684 */ 685 seqno = rap->rxa_start; 686 for (i = 0; i < rap->rxa_wnd; i++) { 687 m = rap->rxa_m[i]; 688 if (m != NULL) { 689 rap->rxa_m[i] = NULL; 690 rap->rxa_qbytes -= m->m_pkthdr.len; 691 rap->rxa_qframes--; 692 vap->iv_stats.is_ampdu_rx_oor++; 693 694 ampdu_dispatch(ni, m); 695 } else { 696 if (!IEEE80211_SEQ_BA_BEFORE(seqno, winstart)) 697 break; 698 } 699 seqno = IEEE80211_SEQ_INC(seqno); 700 } 701 /* 702 * If frames remain, copy the mbuf pointers down so 703 * they correspond to the offsets in the new window. 704 */ 705 if (rap->rxa_qframes != 0) { 706 int n = rap->rxa_qframes, j; 707 708 /* NB: this loop assumes i > 0 and/or rxa_m[0] is NULL */ 709 KASSERT(rap->rxa_m[0] == NULL, 710 ("%s: BA window slot 0 occupied", __func__)); 711 for (j = i+1; j < rap->rxa_wnd; j++) { 712 if (rap->rxa_m[j] != NULL) { 713 rap->rxa_m[j-i] = rap->rxa_m[j]; 714 rap->rxa_m[j] = NULL; 715 if (--n == 0) 716 break; 717 } 718 } 719 KASSERT(n == 0, ("%s: lost %d frames, qframes %d off %d " 720 "BA win <%d:%d> winstart %d", 721 __func__, n, rap->rxa_qframes, i, rap->rxa_start, 722 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 723 winstart)); 724 vap->iv_stats.is_ampdu_rx_copy += rap->rxa_qframes; 725 } 726 /* 727 * Move the start of the BA window; we use the 728 * sequence number of the last MSDU that was 729 * passed up the stack+1 or winstart if stopped on 730 * a gap in the reorder buffer. 731 */ 732 rap->rxa_start = seqno; 733} 734 735/* 736 * Process a received QoS data frame for an HT station. Handle 737 * A-MPDU reordering: if this frame is received out of order 738 * and falls within the BA window hold onto it. Otherwise if 739 * this frame completes a run, flush any pending frames. We 740 * return 1 if the frame is consumed. A 0 is returned if 741 * the frame should be processed normally by the caller. 742 */ 743int 744ieee80211_ampdu_reorder(struct ieee80211_node *ni, struct mbuf *m) 745{ 746#define IEEE80211_FC0_QOSDATA \ 747 (IEEE80211_FC0_TYPE_DATA|IEEE80211_FC0_SUBTYPE_QOS|IEEE80211_FC0_VERSION_0) 748#define PROCESS 0 /* caller should process frame */ 749#define CONSUMED 1 /* frame consumed, caller does nothing */ 750 struct ieee80211vap *vap = ni->ni_vap; 751 struct ieee80211_qosframe *wh; 752 struct ieee80211_rx_ampdu *rap; 753 ieee80211_seq rxseq; 754 uint8_t tid; 755 int off; 756 757 KASSERT((m->m_flags & (M_AMPDU | M_AMPDU_MPDU)) == M_AMPDU, 758 ("!a-mpdu or already re-ordered, flags 0x%x", m->m_flags)); 759 KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT sta")); 760 761 /* NB: m_len known to be sufficient */ 762 wh = mtod(m, struct ieee80211_qosframe *); 763 if (wh->i_fc[0] != IEEE80211_FC0_QOSDATA) { 764 /* 765 * Not QoS data, shouldn't get here but just 766 * return it to the caller for processing. 767 */ 768 return PROCESS; 769 } 770 if (IEEE80211_IS_DSTODS(wh)) 771 tid = ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0]; 772 else 773 tid = wh->i_qos[0]; 774 tid &= IEEE80211_QOS_TID; 775 rap = &ni->ni_rx_ampdu[tid]; 776 if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) { 777 /* 778 * No ADDBA request yet, don't touch. 779 */ 780 return PROCESS; 781 } 782 rxseq = le16toh(*(uint16_t *)wh->i_seq); 783 if ((rxseq & IEEE80211_SEQ_FRAG_MASK) != 0) { 784 /* 785 * Fragments are not allowed; toss. 786 */ 787 IEEE80211_DISCARD_MAC(vap, 788 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr, 789 "A-MPDU", "fragment, rxseq 0x%x tid %u%s", rxseq, tid, 790 wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : ""); 791 vap->iv_stats.is_ampdu_rx_drop++; 792 IEEE80211_NODE_STAT(ni, rx_drop); 793 m_freem(m); 794 return CONSUMED; 795 } 796 rxseq >>= IEEE80211_SEQ_SEQ_SHIFT; 797 rap->rxa_nframes++; 798again: 799 if (rxseq == rap->rxa_start) { 800 /* 801 * First frame in window. 802 */ 803 if (rap->rxa_qframes != 0) { 804 /* 805 * Dispatch as many packets as we can. 806 */ 807 KASSERT(rap->rxa_m[0] == NULL, ("unexpected dup")); 808 ampdu_dispatch(ni, m); 809 ampdu_rx_dispatch(rap, ni); 810 return CONSUMED; 811 } else { 812 /* 813 * In order; advance window and notify 814 * caller to dispatch directly. 815 */ 816 rap->rxa_start = IEEE80211_SEQ_INC(rxseq); 817 return PROCESS; 818 } 819 } 820 /* 821 * Frame is out of order; store if in the BA window. 822 */ 823 /* calculate offset in BA window */ 824 off = IEEE80211_SEQ_SUB(rxseq, rap->rxa_start); 825 if (off < rap->rxa_wnd) { 826 /* 827 * Common case (hopefully): in the BA window. 828 * Sec 9.10.7.6.2 a) (p.137) 829 */ 830#ifdef IEEE80211_AMPDU_AGE 831 /* 832 * Check for frames sitting too long in the reorder queue. 833 * This should only ever happen if frames are not delivered 834 * without the sender otherwise notifying us (e.g. with a 835 * BAR to move the window). Typically this happens because 836 * of vendor bugs that cause the sequence number to jump. 837 * When this happens we get a gap in the reorder queue that 838 * leaves frame sitting on the queue until they get pushed 839 * out due to window moves. When the vendor does not send 840 * BAR this move only happens due to explicit packet sends 841 * 842 * NB: we only track the time of the oldest frame in the 843 * reorder q; this means that if we flush we might push 844 * frames that still "new"; if this happens then subsequent 845 * frames will result in BA window moves which cost something 846 * but is still better than a big throughput dip. 847 */ 848 if (rap->rxa_qframes != 0) { 849 /* XXX honor batimeout? */ 850 if (ticks - rap->rxa_age > ieee80211_ampdu_age) { 851 /* 852 * Too long since we received the first 853 * frame; flush the reorder buffer. 854 */ 855 if (rap->rxa_qframes != 0) { 856 vap->iv_stats.is_ampdu_rx_age += 857 rap->rxa_qframes; 858 ampdu_rx_flush(ni, rap); 859 } 860 rap->rxa_start = IEEE80211_SEQ_INC(rxseq); 861 return PROCESS; 862 } 863 } else { 864 /* 865 * First frame, start aging timer. 866 */ 867 rap->rxa_age = ticks; 868 } 869#endif /* IEEE80211_AMPDU_AGE */ 870 /* save packet */ 871 if (rap->rxa_m[off] == NULL) { 872 rap->rxa_m[off] = m; 873 rap->rxa_qframes++; 874 rap->rxa_qbytes += m->m_pkthdr.len; 875 vap->iv_stats.is_ampdu_rx_reorder++; 876 } else { 877 IEEE80211_DISCARD_MAC(vap, 878 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, 879 ni->ni_macaddr, "a-mpdu duplicate", 880 "seqno %u tid %u BA win <%u:%u>", 881 rxseq, tid, rap->rxa_start, 882 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1)); 883 vap->iv_stats.is_rx_dup++; 884 IEEE80211_NODE_STAT(ni, rx_dup); 885 m_freem(m); 886 } 887 return CONSUMED; 888 } 889 if (off < IEEE80211_SEQ_BA_RANGE) { 890 /* 891 * Outside the BA window, but within range; 892 * flush the reorder q and move the window. 893 * Sec 9.10.7.6.2 b) (p.138) 894 */ 895 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni, 896 "move BA win <%u:%u> (%u frames) rxseq %u tid %u", 897 rap->rxa_start, 898 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 899 rap->rxa_qframes, rxseq, tid); 900 vap->iv_stats.is_ampdu_rx_move++; 901 902 /* 903 * The spec says to flush frames up to but not including: 904 * WinStart_B = rxseq - rap->rxa_wnd + 1 905 * Then insert the frame or notify the caller to process 906 * it immediately. We can safely do this by just starting 907 * over again because we know the frame will now be within 908 * the BA window. 909 */ 910 /* NB: rxa_wnd known to be >0 */ 911 ampdu_rx_flush_upto(ni, rap, 912 IEEE80211_SEQ_SUB(rxseq, rap->rxa_wnd-1)); 913 goto again; 914 } else { 915 /* 916 * Outside the BA window and out of range; toss. 917 * Sec 9.10.7.6.2 c) (p.138) 918 */ 919 IEEE80211_DISCARD_MAC(vap, 920 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr, 921 "MPDU", "BA win <%u:%u> (%u frames) rxseq %u tid %u%s", 922 rap->rxa_start, 923 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 924 rap->rxa_qframes, rxseq, tid, 925 wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : ""); 926 vap->iv_stats.is_ampdu_rx_drop++; 927 IEEE80211_NODE_STAT(ni, rx_drop); 928 m_freem(m); 929 return CONSUMED; 930 } 931#undef CONSUMED 932#undef PROCESS 933#undef IEEE80211_FC0_QOSDATA 934} 935 936/* 937 * Process a BAR ctl frame. Dispatch all frames up to 938 * the sequence number of the frame. If this frame is 939 * out of range it's discarded. 940 */ 941void 942ieee80211_recv_bar(struct ieee80211_node *ni, struct mbuf *m0) 943{ 944 struct ieee80211vap *vap = ni->ni_vap; 945 struct ieee80211_frame_bar *wh; 946 struct ieee80211_rx_ampdu *rap; 947 ieee80211_seq rxseq; 948 int tid, off; 949 950 if (!ieee80211_recv_bar_ena) { 951#if 0 952 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_11N, 953 ni->ni_macaddr, "BAR", "%s", "processing disabled"); 954#endif 955 vap->iv_stats.is_ampdu_bar_bad++; 956 return; 957 } 958 wh = mtod(m0, struct ieee80211_frame_bar *); 959 /* XXX check basic BAR */ 960 tid = MS(le16toh(wh->i_ctl), IEEE80211_BAR_TID); 961 rap = &ni->ni_rx_ampdu[tid]; 962 if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) { 963 /* 964 * No ADDBA request yet, don't touch. 965 */ 966 IEEE80211_DISCARD_MAC(vap, 967 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, 968 ni->ni_macaddr, "BAR", "no BA stream, tid %u", tid); 969 vap->iv_stats.is_ampdu_bar_bad++; 970 return; 971 } 972 vap->iv_stats.is_ampdu_bar_rx++; 973 rxseq = le16toh(wh->i_seq) >> IEEE80211_SEQ_SEQ_SHIFT; 974 if (rxseq == rap->rxa_start) 975 return; 976 /* calculate offset in BA window */ 977 off = IEEE80211_SEQ_SUB(rxseq, rap->rxa_start); 978 if (off < IEEE80211_SEQ_BA_RANGE) { 979 /* 980 * Flush the reorder q up to rxseq and move the window. 981 * Sec 9.10.7.6.3 a) (p.138) 982 */ 983 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni, 984 "BAR moves BA win <%u:%u> (%u frames) rxseq %u tid %u", 985 rap->rxa_start, 986 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 987 rap->rxa_qframes, rxseq, tid); 988 vap->iv_stats.is_ampdu_bar_move++; 989 990 ampdu_rx_flush_upto(ni, rap, rxseq); 991 if (off >= rap->rxa_wnd) { 992 /* 993 * BAR specifies a window start to the right of BA 994 * window; we must move it explicitly since 995 * ampdu_rx_flush_upto will not. 996 */ 997 rap->rxa_start = rxseq; 998 } 999 } else { 1000 /* 1001 * Out of range; toss. 1002 * Sec 9.10.7.6.3 b) (p.138) 1003 */ 1004 IEEE80211_DISCARD_MAC(vap, 1005 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr, 1006 "BAR", "BA win <%u:%u> (%u frames) rxseq %u tid %u%s", 1007 rap->rxa_start, 1008 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 1009 rap->rxa_qframes, rxseq, tid, 1010 wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : ""); 1011 vap->iv_stats.is_ampdu_bar_oow++; 1012 IEEE80211_NODE_STAT(ni, rx_drop); 1013 } 1014} 1015 1016/* 1017 * Setup HT-specific state in a node. Called only 1018 * when HT use is negotiated so we don't do extra 1019 * work for temporary and/or legacy sta's. 1020 */ 1021void 1022ieee80211_ht_node_init(struct ieee80211_node *ni) 1023{ 1024 struct ieee80211_tx_ampdu *tap; 1025 int ac; 1026 1027 if (ni->ni_flags & IEEE80211_NODE_HT) { 1028 /* 1029 * Clean AMPDU state on re-associate. This handles the case 1030 * where a station leaves w/o notifying us and then returns 1031 * before node is reaped for inactivity. 1032 */ 1033 ieee80211_ht_node_cleanup(ni); 1034 } 1035 for (ac = 0; ac < WME_NUM_AC; ac++) { 1036 tap = &ni->ni_tx_ampdu[ac]; 1037 tap->txa_ac = ac; 1038 tap->txa_ni = ni; 1039 /* NB: further initialization deferred */ 1040 } 1041 ni->ni_flags |= IEEE80211_NODE_HT | IEEE80211_NODE_AMPDU; 1042} 1043 1044/* 1045 * Cleanup HT-specific state in a node. Called only 1046 * when HT use has been marked. 1047 */ 1048void 1049ieee80211_ht_node_cleanup(struct ieee80211_node *ni) 1050{ 1051 struct ieee80211com *ic = ni->ni_ic; 1052 int i; 1053 1054 KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT node")); 1055 1056 /* XXX optimize this */ 1057 for (i = 0; i < WME_NUM_AC; i++) { 1058 struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[i]; 1059 if (tap->txa_flags & IEEE80211_AGGR_SETUP) 1060 ampdu_tx_stop(tap); 1061 } 1062 for (i = 0; i < WME_NUM_TID; i++) 1063 ic->ic_ampdu_rx_stop(ni, &ni->ni_rx_ampdu[i]); 1064 1065 ni->ni_htcap = 0; 1066 ni->ni_flags &= ~IEEE80211_NODE_HT_ALL; 1067} 1068 1069/* 1070 * Age out HT resources for a station. 1071 */ 1072void 1073ieee80211_ht_node_age(struct ieee80211_node *ni) 1074{ 1075#ifdef IEEE80211_AMPDU_AGE 1076 struct ieee80211vap *vap = ni->ni_vap; 1077 uint8_t tid; 1078#endif 1079 1080 KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT sta")); 1081 1082#ifdef IEEE80211_AMPDU_AGE 1083 for (tid = 0; tid < WME_NUM_TID; tid++) { 1084 struct ieee80211_rx_ampdu *rap; 1085 1086 rap = &ni->ni_rx_ampdu[tid]; 1087 if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) 1088 continue; 1089 if (rap->rxa_qframes == 0) 1090 continue; 1091 /* 1092 * Check for frames sitting too long in the reorder queue. 1093 * See above for more details on what's happening here. 1094 */ 1095 /* XXX honor batimeout? */ 1096 if (ticks - rap->rxa_age > ieee80211_ampdu_age) { 1097 /* 1098 * Too long since we received the first 1099 * frame; flush the reorder buffer. 1100 */ 1101 vap->iv_stats.is_ampdu_rx_age += rap->rxa_qframes; 1102 ampdu_rx_flush(ni, rap); 1103 } 1104 } 1105#endif /* IEEE80211_AMPDU_AGE */ 1106} 1107 1108static struct ieee80211_channel * 1109findhtchan(struct ieee80211com *ic, struct ieee80211_channel *c, int htflags) 1110{ 1111 return ieee80211_find_channel(ic, c->ic_freq, 1112 (c->ic_flags &~ IEEE80211_CHAN_HT) | htflags); 1113} 1114 1115/* 1116 * Adjust a channel to be HT/non-HT according to the vap's configuration. 1117 */ 1118struct ieee80211_channel * 1119ieee80211_ht_adjust_channel(struct ieee80211com *ic, 1120 struct ieee80211_channel *chan, int flags) 1121{ 1122 struct ieee80211_channel *c; 1123 1124 if (flags & IEEE80211_FHT_HT) { 1125 /* promote to HT if possible */ 1126 if (flags & IEEE80211_FHT_USEHT40) { 1127 if (!IEEE80211_IS_CHAN_HT40(chan)) { 1128 /* NB: arbitrarily pick ht40+ over ht40- */ 1129 c = findhtchan(ic, chan, IEEE80211_CHAN_HT40U); 1130 if (c == NULL) 1131 c = findhtchan(ic, chan, 1132 IEEE80211_CHAN_HT40D); 1133 if (c == NULL) 1134 c = findhtchan(ic, chan, 1135 IEEE80211_CHAN_HT20); 1136 if (c != NULL) 1137 chan = c; 1138 } 1139 } else if (!IEEE80211_IS_CHAN_HT20(chan)) { 1140 c = findhtchan(ic, chan, IEEE80211_CHAN_HT20); 1141 if (c != NULL) 1142 chan = c; 1143 } 1144 } else if (IEEE80211_IS_CHAN_HT(chan)) { 1145 /* demote to legacy, HT use is disabled */ 1146 c = ieee80211_find_channel(ic, chan->ic_freq, 1147 chan->ic_flags &~ IEEE80211_CHAN_HT); 1148 if (c != NULL) 1149 chan = c; 1150 } 1151 return chan; 1152} 1153 1154/* 1155 * Setup HT-specific state for a legacy WDS peer. 1156 */ 1157void 1158ieee80211_ht_wds_init(struct ieee80211_node *ni) 1159{ 1160 struct ieee80211vap *vap = ni->ni_vap; 1161 struct ieee80211_tx_ampdu *tap; 1162 int ac; 1163 1164 KASSERT(vap->iv_flags_ht & IEEE80211_FHT_HT, ("no HT requested")); 1165 1166 /* XXX check scan cache in case peer has an ap and we have info */ 1167 /* 1168 * If setup with a legacy channel; locate an HT channel. 1169 * Otherwise if the inherited channel (from a companion 1170 * AP) is suitable use it so we use the same location 1171 * for the extension channel). 1172 */ 1173 ni->ni_chan = ieee80211_ht_adjust_channel(ni->ni_ic, 1174 ni->ni_chan, ieee80211_htchanflags(ni->ni_chan)); 1175 1176 ni->ni_htcap = 0; 1177 if (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20) 1178 ni->ni_htcap |= IEEE80211_HTCAP_SHORTGI20; 1179 if (IEEE80211_IS_CHAN_HT40(ni->ni_chan)) { 1180 ni->ni_htcap |= IEEE80211_HTCAP_CHWIDTH40; 1181 ni->ni_chw = 40; 1182 if (IEEE80211_IS_CHAN_HT40U(ni->ni_chan)) 1183 ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_ABOVE; 1184 else if (IEEE80211_IS_CHAN_HT40D(ni->ni_chan)) 1185 ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_BELOW; 1186 if (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40) 1187 ni->ni_htcap |= IEEE80211_HTCAP_SHORTGI40; 1188 } else { 1189 ni->ni_chw = 20; 1190 ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_NONE; 1191 } 1192 ni->ni_htctlchan = ni->ni_chan->ic_ieee; 1193 if (vap->iv_flags_ht & IEEE80211_FHT_RIFS) 1194 ni->ni_flags |= IEEE80211_NODE_RIFS; 1195 /* XXX does it make sense to enable SMPS? */ 1196 1197 ni->ni_htopmode = 0; /* XXX need protection state */ 1198 ni->ni_htstbc = 0; /* XXX need info */ 1199 1200 for (ac = 0; ac < WME_NUM_AC; ac++) { 1201 tap = &ni->ni_tx_ampdu[ac]; 1202 tap->txa_ac = ac; 1203 } 1204 /* NB: AMPDU tx/rx governed by IEEE80211_FHT_AMPDU_{TX,RX} */ 1205 ni->ni_flags |= IEEE80211_NODE_HT | IEEE80211_NODE_AMPDU; 1206} 1207 1208/* 1209 * Notify hostap vaps of a change in the HTINFO ie. 1210 */ 1211static void 1212htinfo_notify(struct ieee80211com *ic) 1213{ 1214 struct ieee80211vap *vap; 1215 int first = 1; 1216 1217 IEEE80211_LOCK_ASSERT(ic); 1218 1219 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1220 if (vap->iv_opmode != IEEE80211_M_HOSTAP) 1221 continue; 1222 if (vap->iv_state != IEEE80211_S_RUN || 1223 !IEEE80211_IS_CHAN_HT(vap->iv_bss->ni_chan)) 1224 continue; 1225 if (first) { 1226 IEEE80211_NOTE(vap, 1227 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, 1228 vap->iv_bss, 1229 "HT bss occupancy change: %d sta, %d ht, " 1230 "%d ht40%s, HT protmode now 0x%x" 1231 , ic->ic_sta_assoc 1232 , ic->ic_ht_sta_assoc 1233 , ic->ic_ht40_sta_assoc 1234 , (ic->ic_flags_ht & IEEE80211_FHT_NONHT_PR) ? 1235 ", non-HT sta present" : "" 1236 , ic->ic_curhtprotmode); 1237 first = 0; 1238 } 1239 ieee80211_beacon_notify(vap, IEEE80211_BEACON_HTINFO); 1240 } 1241} 1242 1243/* 1244 * Calculate HT protection mode from current 1245 * state and handle updates. 1246 */ 1247static void 1248htinfo_update(struct ieee80211com *ic) 1249{ 1250 uint8_t protmode; 1251 1252 if (ic->ic_sta_assoc != ic->ic_ht_sta_assoc) { 1253 protmode = IEEE80211_HTINFO_OPMODE_MIXED 1254 | IEEE80211_HTINFO_NONHT_PRESENT; 1255 } else if (ic->ic_flags_ht & IEEE80211_FHT_NONHT_PR) { 1256 protmode = IEEE80211_HTINFO_OPMODE_PROTOPT 1257 | IEEE80211_HTINFO_NONHT_PRESENT; 1258 } else if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && 1259 IEEE80211_IS_CHAN_HT40(ic->ic_bsschan) && 1260 ic->ic_sta_assoc != ic->ic_ht40_sta_assoc) { 1261 protmode = IEEE80211_HTINFO_OPMODE_HT20PR; 1262 } else { 1263 protmode = IEEE80211_HTINFO_OPMODE_PURE; 1264 } 1265 if (protmode != ic->ic_curhtprotmode) { 1266 ic->ic_curhtprotmode = protmode; 1267 htinfo_notify(ic); 1268 } 1269} 1270 1271/* 1272 * Handle an HT station joining a BSS. 1273 */ 1274void 1275ieee80211_ht_node_join(struct ieee80211_node *ni) 1276{ 1277 struct ieee80211com *ic = ni->ni_ic; 1278 1279 IEEE80211_LOCK_ASSERT(ic); 1280 1281 if (ni->ni_flags & IEEE80211_NODE_HT) { 1282 ic->ic_ht_sta_assoc++; 1283 if (ni->ni_chw == 40) 1284 ic->ic_ht40_sta_assoc++; 1285 } 1286 htinfo_update(ic); 1287} 1288 1289/* 1290 * Handle an HT station leaving a BSS. 1291 */ 1292void 1293ieee80211_ht_node_leave(struct ieee80211_node *ni) 1294{ 1295 struct ieee80211com *ic = ni->ni_ic; 1296 1297 IEEE80211_LOCK_ASSERT(ic); 1298 1299 if (ni->ni_flags & IEEE80211_NODE_HT) { 1300 ic->ic_ht_sta_assoc--; 1301 if (ni->ni_chw == 40) 1302 ic->ic_ht40_sta_assoc--; 1303 } 1304 htinfo_update(ic); 1305} 1306 1307/* 1308 * Public version of htinfo_update; used for processing 1309 * beacon frames from overlapping bss. 1310 * 1311 * Caller can specify either IEEE80211_HTINFO_OPMODE_MIXED 1312 * (on receipt of a beacon that advertises MIXED) or 1313 * IEEE80211_HTINFO_OPMODE_PROTOPT (on receipt of a beacon 1314 * from an overlapping legacy bss). We treat MIXED with 1315 * a higher precedence than PROTOPT (i.e. we will not change 1316 * change PROTOPT -> MIXED; only MIXED -> PROTOPT). This 1317 * corresponds to how we handle things in htinfo_update. 1318 */ 1319void 1320ieee80211_htprot_update(struct ieee80211com *ic, int protmode) 1321{ 1322#define OPMODE(x) SM(x, IEEE80211_HTINFO_OPMODE) 1323 IEEE80211_LOCK(ic); 1324 1325 /* track non-HT station presence */ 1326 KASSERT(protmode & IEEE80211_HTINFO_NONHT_PRESENT, 1327 ("protmode 0x%x", protmode)); 1328 ic->ic_flags_ht |= IEEE80211_FHT_NONHT_PR; 1329 ic->ic_lastnonht = ticks; 1330 1331 if (protmode != ic->ic_curhtprotmode && 1332 (OPMODE(ic->ic_curhtprotmode) != IEEE80211_HTINFO_OPMODE_MIXED || 1333 OPMODE(protmode) == IEEE80211_HTINFO_OPMODE_PROTOPT)) { 1334 /* push beacon update */ 1335 ic->ic_curhtprotmode = protmode; 1336 htinfo_notify(ic); 1337 } 1338 IEEE80211_UNLOCK(ic); 1339#undef OPMODE 1340} 1341 1342/* 1343 * Time out presence of an overlapping bss with non-HT 1344 * stations. When operating in hostap mode we listen for 1345 * beacons from other stations and if we identify a non-HT 1346 * station is present we update the opmode field of the 1347 * HTINFO ie. To identify when all non-HT stations are 1348 * gone we time out this condition. 1349 */ 1350void 1351ieee80211_ht_timeout(struct ieee80211com *ic) 1352{ 1353 IEEE80211_LOCK_ASSERT(ic); 1354 1355 if ((ic->ic_flags_ht & IEEE80211_FHT_NONHT_PR) && 1356 time_after(ticks, ic->ic_lastnonht + IEEE80211_NONHT_PRESENT_AGE)) { 1357#if 0 1358 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni, 1359 "%s", "time out non-HT STA present on channel"); 1360#endif 1361 ic->ic_flags_ht &= ~IEEE80211_FHT_NONHT_PR; 1362 htinfo_update(ic); 1363 } 1364} 1365 1366/* unalligned little endian access */ 1367#define LE_READ_2(p) \ 1368 ((uint16_t) \ 1369 ((((const uint8_t *)(p))[0] ) | \ 1370 (((const uint8_t *)(p))[1] << 8))) 1371 1372/* 1373 * Process an 802.11n HT capabilities ie. 1374 */ 1375void 1376ieee80211_parse_htcap(struct ieee80211_node *ni, const uint8_t *ie) 1377{ 1378 if (ie[0] == IEEE80211_ELEMID_VENDOR) { 1379 /* 1380 * Station used Vendor OUI ie to associate; 1381 * mark the node so when we respond we'll use 1382 * the Vendor OUI's and not the standard ie's. 1383 */ 1384 ni->ni_flags |= IEEE80211_NODE_HTCOMPAT; 1385 ie += 4; 1386 } else 1387 ni->ni_flags &= ~IEEE80211_NODE_HTCOMPAT; 1388 1389 ni->ni_htcap = LE_READ_2(ie + 1390 __offsetof(struct ieee80211_ie_htcap, hc_cap)); 1391 ni->ni_htparam = ie[__offsetof(struct ieee80211_ie_htcap, hc_param)]; 1392} 1393 1394static void 1395htinfo_parse(struct ieee80211_node *ni, 1396 const struct ieee80211_ie_htinfo *htinfo) 1397{ 1398 uint16_t w; 1399 1400 ni->ni_htctlchan = htinfo->hi_ctrlchannel; 1401 ni->ni_ht2ndchan = SM(htinfo->hi_byte1, IEEE80211_HTINFO_2NDCHAN); 1402 w = LE_READ_2(&htinfo->hi_byte2); 1403 ni->ni_htopmode = SM(w, IEEE80211_HTINFO_OPMODE); 1404 w = LE_READ_2(&htinfo->hi_byte45); 1405 ni->ni_htstbc = SM(w, IEEE80211_HTINFO_BASIC_STBCMCS); 1406} 1407 1408/* 1409 * Parse an 802.11n HT info ie and save useful information 1410 * to the node state. Note this does not effect any state 1411 * changes such as for channel width change. 1412 */ 1413void 1414ieee80211_parse_htinfo(struct ieee80211_node *ni, const uint8_t *ie) 1415{ 1416 if (ie[0] == IEEE80211_ELEMID_VENDOR) 1417 ie += 4; 1418 htinfo_parse(ni, (const struct ieee80211_ie_htinfo *) ie); 1419} 1420 1421/* 1422 * Handle 11n channel switch. Use the received HT ie's to 1423 * identify the right channel to use. If we cannot locate it 1424 * in the channel table then fallback to legacy operation. 1425 * Note that we use this information to identify the node's 1426 * channel only; the caller is responsible for insuring any 1427 * required channel change is done (e.g. in sta mode when 1428 * parsing the contents of a beacon frame). 1429 */ 1430static void 1431htinfo_update_chw(struct ieee80211_node *ni, int htflags) 1432{ 1433 struct ieee80211com *ic = ni->ni_ic; 1434 struct ieee80211_channel *c; 1435 int chanflags; 1436 1437 chanflags = (ni->ni_chan->ic_flags &~ IEEE80211_CHAN_HT) | htflags; 1438 if (chanflags != ni->ni_chan->ic_flags) { 1439 /* XXX not right for ht40- */ 1440 c = ieee80211_find_channel(ic, ni->ni_chan->ic_freq, chanflags); 1441 if (c == NULL && (htflags & IEEE80211_CHAN_HT40)) { 1442 /* 1443 * No HT40 channel entry in our table; fall back 1444 * to HT20 operation. This should not happen. 1445 */ 1446 c = findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT20); 1447#if 0 1448 IEEE80211_NOTE(ni->ni_vap, 1449 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni, 1450 "no HT40 channel (freq %u), falling back to HT20", 1451 ni->ni_chan->ic_freq); 1452#endif 1453 /* XXX stat */ 1454 } 1455 if (c != NULL && c != ni->ni_chan) { 1456 IEEE80211_NOTE(ni->ni_vap, 1457 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni, 1458 "switch station to HT%d channel %u/0x%x", 1459 IEEE80211_IS_CHAN_HT40(c) ? 40 : 20, 1460 c->ic_freq, c->ic_flags); 1461 ni->ni_chan = c; 1462 } 1463 /* NB: caller responsible for forcing any channel change */ 1464 } 1465 /* update node's tx channel width */ 1466 ni->ni_chw = IEEE80211_IS_CHAN_HT40(ni->ni_chan)? 40 : 20; 1467} 1468 1469/* 1470 * Update 11n MIMO PS state according to received htcap. 1471 */ 1472static __inline int 1473htcap_update_mimo_ps(struct ieee80211_node *ni) 1474{ 1475 uint16_t oflags = ni->ni_flags; 1476 1477 switch (ni->ni_htcap & IEEE80211_HTCAP_SMPS) { 1478 case IEEE80211_HTCAP_SMPS_DYNAMIC: 1479 ni->ni_flags |= IEEE80211_NODE_MIMO_PS; 1480 ni->ni_flags |= IEEE80211_NODE_MIMO_RTS; 1481 break; 1482 case IEEE80211_HTCAP_SMPS_ENA: 1483 ni->ni_flags |= IEEE80211_NODE_MIMO_PS; 1484 ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS; 1485 break; 1486 case IEEE80211_HTCAP_SMPS_OFF: 1487 default: /* disable on rx of reserved value */ 1488 ni->ni_flags &= ~IEEE80211_NODE_MIMO_PS; 1489 ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS; 1490 break; 1491 } 1492 return (oflags ^ ni->ni_flags); 1493} 1494 1495/* 1496 * Update short GI state according to received htcap 1497 * and local settings. 1498 */ 1499static __inline void 1500htcap_update_shortgi(struct ieee80211_node *ni) 1501{ 1502 struct ieee80211vap *vap = ni->ni_vap; 1503 1504 ni->ni_flags &= ~(IEEE80211_NODE_SGI20|IEEE80211_NODE_SGI40); 1505 if ((ni->ni_htcap & IEEE80211_HTCAP_SHORTGI20) && 1506 (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20)) 1507 ni->ni_flags |= IEEE80211_NODE_SGI20; 1508 if ((ni->ni_htcap & IEEE80211_HTCAP_SHORTGI40) && 1509 (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40)) 1510 ni->ni_flags |= IEEE80211_NODE_SGI40; 1511} 1512 1513/* 1514 * Parse and update HT-related state extracted from 1515 * the HT cap and info ie's. 1516 */ 1517void 1518ieee80211_ht_updateparams(struct ieee80211_node *ni, 1519 const uint8_t *htcapie, const uint8_t *htinfoie) 1520{ 1521 struct ieee80211vap *vap = ni->ni_vap; 1522 const struct ieee80211_ie_htinfo *htinfo; 1523 int htflags; 1524 1525 ieee80211_parse_htcap(ni, htcapie); 1526 if (vap->iv_htcaps & IEEE80211_HTCAP_SMPS) 1527 htcap_update_mimo_ps(ni); 1528 htcap_update_shortgi(ni); 1529 1530 if (htinfoie[0] == IEEE80211_ELEMID_VENDOR) 1531 htinfoie += 4; 1532 htinfo = (const struct ieee80211_ie_htinfo *) htinfoie; 1533 htinfo_parse(ni, htinfo); 1534 1535 htflags = (vap->iv_flags_ht & IEEE80211_FHT_HT) ? 1536 IEEE80211_CHAN_HT20 : 0; 1537 /* NB: honor operating mode constraint */ 1538 if ((htinfo->hi_byte1 & IEEE80211_HTINFO_TXWIDTH_2040) && 1539 (vap->iv_flags_ht & IEEE80211_FHT_USEHT40)) { 1540 if (ni->ni_ht2ndchan == IEEE80211_HTINFO_2NDCHAN_ABOVE) 1541 htflags = IEEE80211_CHAN_HT40U; 1542 else if (ni->ni_ht2ndchan == IEEE80211_HTINFO_2NDCHAN_BELOW) 1543 htflags = IEEE80211_CHAN_HT40D; 1544 } 1545 htinfo_update_chw(ni, htflags); 1546 1547 if ((htinfo->hi_byte1 & IEEE80211_HTINFO_RIFSMODE_PERM) && 1548 (vap->iv_flags_ht & IEEE80211_FHT_RIFS)) 1549 ni->ni_flags |= IEEE80211_NODE_RIFS; 1550 else 1551 ni->ni_flags &= ~IEEE80211_NODE_RIFS; 1552} 1553 1554/* 1555 * Parse and update HT-related state extracted from the HT cap ie 1556 * for a station joining an HT BSS. 1557 */ 1558void 1559ieee80211_ht_updatehtcap(struct ieee80211_node *ni, const uint8_t *htcapie) 1560{ 1561 struct ieee80211vap *vap = ni->ni_vap; 1562 int htflags; 1563 1564 ieee80211_parse_htcap(ni, htcapie); 1565 if (vap->iv_htcaps & IEEE80211_HTCAP_SMPS) 1566 htcap_update_mimo_ps(ni); 1567 htcap_update_shortgi(ni); 1568 1569 /* NB: honor operating mode constraint */ 1570 /* XXX 40 MHz intolerant */ 1571 htflags = (vap->iv_flags_ht & IEEE80211_FHT_HT) ? 1572 IEEE80211_CHAN_HT20 : 0; 1573 if ((ni->ni_htcap & IEEE80211_HTCAP_CHWIDTH40) && 1574 (vap->iv_flags_ht & IEEE80211_FHT_USEHT40)) { 1575 if (IEEE80211_IS_CHAN_HT40U(vap->iv_bss->ni_chan)) 1576 htflags = IEEE80211_CHAN_HT40U; 1577 else if (IEEE80211_IS_CHAN_HT40D(vap->iv_bss->ni_chan)) 1578 htflags = IEEE80211_CHAN_HT40D; 1579 } 1580 htinfo_update_chw(ni, htflags); 1581} 1582 1583/* 1584 * Install received HT rate set by parsing the HT cap ie. 1585 */ 1586int 1587ieee80211_setup_htrates(struct ieee80211_node *ni, const uint8_t *ie, int flags) 1588{ 1589 struct ieee80211com *ic = ni->ni_ic; 1590 struct ieee80211vap *vap = ni->ni_vap; 1591 const struct ieee80211_ie_htcap *htcap; 1592 struct ieee80211_htrateset *rs; 1593 int i, maxequalmcs, maxunequalmcs; 1594 1595 maxequalmcs = ic->ic_txstream * 8 - 1; 1596 if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL) { 1597 if (ic->ic_txstream >= 2) 1598 maxunequalmcs = 38; 1599 if (ic->ic_txstream >= 3) 1600 maxunequalmcs = 52; 1601 if (ic->ic_txstream >= 4) 1602 maxunequalmcs = 76; 1603 } else 1604 maxunequalmcs = 0; 1605 1606 rs = &ni->ni_htrates; 1607 memset(rs, 0, sizeof(*rs)); 1608 if (ie != NULL) { 1609 if (ie[0] == IEEE80211_ELEMID_VENDOR) 1610 ie += 4; 1611 htcap = (const struct ieee80211_ie_htcap *) ie; 1612 for (i = 0; i < IEEE80211_HTRATE_MAXSIZE; i++) { 1613 if (isclr(htcap->hc_mcsset, i)) 1614 continue; 1615 if (rs->rs_nrates == IEEE80211_HTRATE_MAXSIZE) { 1616 IEEE80211_NOTE(vap, 1617 IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni, 1618 "WARNING, HT rate set too large; only " 1619 "using %u rates", IEEE80211_HTRATE_MAXSIZE); 1620 vap->iv_stats.is_rx_rstoobig++; 1621 break; 1622 } 1623 if (i <= 31 && i > maxequalmcs) 1624 continue; 1625 if (i == 32 && 1626 (ic->ic_htcaps & IEEE80211_HTC_TXMCS32) == 0) 1627 continue; 1628 if (i > 32 && i > maxunequalmcs) 1629 continue; 1630 rs->rs_rates[rs->rs_nrates++] = i; 1631 } 1632 } 1633 return ieee80211_fix_rate(ni, (struct ieee80211_rateset *) rs, flags); 1634} 1635 1636/* 1637 * Mark rates in a node's HT rate set as basic according 1638 * to the information in the supplied HT info ie. 1639 */ 1640void 1641ieee80211_setup_basic_htrates(struct ieee80211_node *ni, const uint8_t *ie) 1642{ 1643 const struct ieee80211_ie_htinfo *htinfo; 1644 struct ieee80211_htrateset *rs; 1645 int i, j; 1646 1647 if (ie[0] == IEEE80211_ELEMID_VENDOR) 1648 ie += 4; 1649 htinfo = (const struct ieee80211_ie_htinfo *) ie; 1650 rs = &ni->ni_htrates; 1651 if (rs->rs_nrates == 0) { 1652 IEEE80211_NOTE(ni->ni_vap, 1653 IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni, 1654 "%s", "WARNING, empty HT rate set"); 1655 return; 1656 } 1657 for (i = 0; i < IEEE80211_HTRATE_MAXSIZE; i++) { 1658 if (isclr(htinfo->hi_basicmcsset, i)) 1659 continue; 1660 for (j = 0; j < rs->rs_nrates; j++) 1661 if ((rs->rs_rates[j] & IEEE80211_RATE_VAL) == i) 1662 rs->rs_rates[j] |= IEEE80211_RATE_BASIC; 1663 } 1664} 1665 1666static void 1667ampdu_tx_setup(struct ieee80211_tx_ampdu *tap) 1668{ 1669 callout_init(&tap->txa_timer, CALLOUT_MPSAFE); 1670 tap->txa_flags |= IEEE80211_AGGR_SETUP; 1671} 1672 1673static void 1674ampdu_tx_stop(struct ieee80211_tx_ampdu *tap) 1675{ 1676 struct ieee80211_node *ni = tap->txa_ni; 1677 struct ieee80211com *ic = ni->ni_ic; 1678 1679 KASSERT(tap->txa_flags & IEEE80211_AGGR_SETUP, 1680 ("txa_flags 0x%x ac %d", tap->txa_flags, tap->txa_ac)); 1681 1682 /* 1683 * Stop BA stream if setup so driver has a chance 1684 * to reclaim any resources it might have allocated. 1685 */ 1686 ic->ic_addba_stop(ni, tap); 1687 /* 1688 * Stop any pending BAR transmit. 1689 */ 1690 bar_stop_timer(tap); 1691 1692 tap->txa_lastsample = 0; 1693 tap->txa_avgpps = 0; 1694 /* NB: clearing NAK means we may re-send ADDBA */ 1695 tap->txa_flags &= ~(IEEE80211_AGGR_SETUP | IEEE80211_AGGR_NAK); 1696} 1697 1698/* 1699 * ADDBA response timeout. 1700 * 1701 * If software aggregation and per-TID queue management was done here, 1702 * that queue would be unpaused after the ADDBA timeout occurs. 1703 */ 1704static void 1705addba_timeout(void *arg) 1706{ 1707 struct ieee80211_tx_ampdu *tap = arg; 1708 struct ieee80211_node *ni = tap->txa_ni; 1709 struct ieee80211com *ic = ni->ni_ic; 1710 1711 /* XXX ? */ 1712 tap->txa_flags &= ~IEEE80211_AGGR_XCHGPEND; 1713 tap->txa_attempts++; 1714 ic->ic_addba_response_timeout(ni, tap); 1715} 1716 1717static void 1718addba_start_timeout(struct ieee80211_tx_ampdu *tap) 1719{ 1720 /* XXX use CALLOUT_PENDING instead? */ 1721 callout_reset(&tap->txa_timer, ieee80211_addba_timeout, 1722 addba_timeout, tap); 1723 tap->txa_flags |= IEEE80211_AGGR_XCHGPEND; 1724 tap->txa_nextrequest = ticks + ieee80211_addba_timeout; 1725} 1726 1727static void 1728addba_stop_timeout(struct ieee80211_tx_ampdu *tap) 1729{ 1730 /* XXX use CALLOUT_PENDING instead? */ 1731 if (tap->txa_flags & IEEE80211_AGGR_XCHGPEND) { 1732 callout_stop(&tap->txa_timer); 1733 tap->txa_flags &= ~IEEE80211_AGGR_XCHGPEND; 1734 } 1735} 1736 1737static void 1738null_addba_response_timeout(struct ieee80211_node *ni, 1739 struct ieee80211_tx_ampdu *tap) 1740{ 1741} 1742 1743/* 1744 * Default method for requesting A-MPDU tx aggregation. 1745 * We setup the specified state block and start a timer 1746 * to wait for an ADDBA response frame. 1747 */ 1748static int 1749ieee80211_addba_request(struct ieee80211_node *ni, 1750 struct ieee80211_tx_ampdu *tap, 1751 int dialogtoken, int baparamset, int batimeout) 1752{ 1753 int bufsiz; 1754 1755 /* XXX locking */ 1756 tap->txa_token = dialogtoken; 1757 tap->txa_flags |= IEEE80211_AGGR_IMMEDIATE; 1758 bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ); 1759 tap->txa_wnd = (bufsiz == 0) ? 1760 IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX); 1761 addba_start_timeout(tap); 1762 return 1; 1763} 1764 1765/* 1766 * Default method for processing an A-MPDU tx aggregation 1767 * response. We shutdown any pending timer and update the 1768 * state block according to the reply. 1769 */ 1770static int 1771ieee80211_addba_response(struct ieee80211_node *ni, 1772 struct ieee80211_tx_ampdu *tap, 1773 int status, int baparamset, int batimeout) 1774{ 1775 int bufsiz, tid; 1776 1777 /* XXX locking */ 1778 addba_stop_timeout(tap); 1779 if (status == IEEE80211_STATUS_SUCCESS) { 1780 bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ); 1781 /* XXX override our request? */ 1782 tap->txa_wnd = (bufsiz == 0) ? 1783 IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX); 1784 /* XXX AC/TID */ 1785 tid = MS(baparamset, IEEE80211_BAPS_TID); 1786 tap->txa_flags |= IEEE80211_AGGR_RUNNING; 1787 tap->txa_attempts = 0; 1788 } else { 1789 /* mark tid so we don't try again */ 1790 tap->txa_flags |= IEEE80211_AGGR_NAK; 1791 } 1792 return 1; 1793} 1794 1795/* 1796 * Default method for stopping A-MPDU tx aggregation. 1797 * Any timer is cleared and we drain any pending frames. 1798 */ 1799static void 1800ieee80211_addba_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap) 1801{ 1802 /* XXX locking */ 1803 addba_stop_timeout(tap); 1804 if (tap->txa_flags & IEEE80211_AGGR_RUNNING) { 1805 /* XXX clear aggregation queue */ 1806 tap->txa_flags &= ~IEEE80211_AGGR_RUNNING; 1807 } 1808 tap->txa_attempts = 0; 1809} 1810 1811/* 1812 * Process a received action frame using the default aggregation 1813 * policy. We intercept ADDBA-related frames and use them to 1814 * update our aggregation state. All other frames are passed up 1815 * for processing by ieee80211_recv_action. 1816 */ 1817static int 1818ht_recv_action_ba_addba_request(struct ieee80211_node *ni, 1819 const struct ieee80211_frame *wh, 1820 const uint8_t *frm, const uint8_t *efrm) 1821{ 1822 struct ieee80211com *ic = ni->ni_ic; 1823 struct ieee80211vap *vap = ni->ni_vap; 1824 struct ieee80211_rx_ampdu *rap; 1825 uint8_t dialogtoken; 1826 uint16_t baparamset, batimeout, baseqctl; 1827 uint16_t args[5]; 1828 int tid; 1829 1830 dialogtoken = frm[2]; 1831 baparamset = LE_READ_2(frm+3); 1832 batimeout = LE_READ_2(frm+5); 1833 baseqctl = LE_READ_2(frm+7); 1834 1835 tid = MS(baparamset, IEEE80211_BAPS_TID); 1836 1837 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 1838 "recv ADDBA request: dialogtoken %u baparamset 0x%x " 1839 "(tid %d bufsiz %d) batimeout %d baseqctl %d:%d", 1840 dialogtoken, baparamset, 1841 tid, MS(baparamset, IEEE80211_BAPS_BUFSIZ), 1842 batimeout, 1843 MS(baseqctl, IEEE80211_BASEQ_START), 1844 MS(baseqctl, IEEE80211_BASEQ_FRAG)); 1845 1846 rap = &ni->ni_rx_ampdu[tid]; 1847 1848 /* Send ADDBA response */ 1849 args[0] = dialogtoken; 1850 /* 1851 * NB: We ack only if the sta associated with HT and 1852 * the ap is configured to do AMPDU rx (the latter 1853 * violates the 11n spec and is mostly for testing). 1854 */ 1855 if ((ni->ni_flags & IEEE80211_NODE_AMPDU_RX) && 1856 (vap->iv_flags_ht & IEEE80211_FHT_AMPDU_RX)) { 1857 /* XXX handle ampdu_rx_start failure */ 1858 ic->ic_ampdu_rx_start(ni, rap, 1859 baparamset, batimeout, baseqctl); 1860 1861 args[1] = IEEE80211_STATUS_SUCCESS; 1862 } else { 1863 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 1864 ni, "reject ADDBA request: %s", 1865 ni->ni_flags & IEEE80211_NODE_AMPDU_RX ? 1866 "administratively disabled" : 1867 "not negotiated for station"); 1868 vap->iv_stats.is_addba_reject++; 1869 args[1] = IEEE80211_STATUS_UNSPECIFIED; 1870 } 1871 /* XXX honor rap flags? */ 1872 args[2] = IEEE80211_BAPS_POLICY_IMMEDIATE 1873 | SM(tid, IEEE80211_BAPS_TID) 1874 | SM(rap->rxa_wnd, IEEE80211_BAPS_BUFSIZ) 1875 ; 1876 args[3] = 0; 1877 args[4] = 0; 1878 ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA, 1879 IEEE80211_ACTION_BA_ADDBA_RESPONSE, args); 1880 return 0; 1881} 1882 1883static int 1884ht_recv_action_ba_addba_response(struct ieee80211_node *ni, 1885 const struct ieee80211_frame *wh, 1886 const uint8_t *frm, const uint8_t *efrm) 1887{ 1888 struct ieee80211com *ic = ni->ni_ic; 1889 struct ieee80211vap *vap = ni->ni_vap; 1890 struct ieee80211_tx_ampdu *tap; 1891 uint8_t dialogtoken, policy; 1892 uint16_t baparamset, batimeout, code; 1893 int tid, ac, bufsiz; 1894 1895 dialogtoken = frm[2]; 1896 code = LE_READ_2(frm+3); 1897 baparamset = LE_READ_2(frm+5); 1898 tid = MS(baparamset, IEEE80211_BAPS_TID); 1899 bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ); 1900 policy = MS(baparamset, IEEE80211_BAPS_POLICY); 1901 batimeout = LE_READ_2(frm+7); 1902 1903 ac = TID_TO_WME_AC(tid); 1904 tap = &ni->ni_tx_ampdu[ac]; 1905 if ((tap->txa_flags & IEEE80211_AGGR_XCHGPEND) == 0) { 1906 IEEE80211_DISCARD_MAC(vap, 1907 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 1908 ni->ni_macaddr, "ADDBA response", 1909 "no pending ADDBA, tid %d dialogtoken %u " 1910 "code %d", tid, dialogtoken, code); 1911 vap->iv_stats.is_addba_norequest++; 1912 return 0; 1913 } 1914 if (dialogtoken != tap->txa_token) { 1915 IEEE80211_DISCARD_MAC(vap, 1916 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 1917 ni->ni_macaddr, "ADDBA response", 1918 "dialogtoken mismatch: waiting for %d, " 1919 "received %d, tid %d code %d", 1920 tap->txa_token, dialogtoken, tid, code); 1921 vap->iv_stats.is_addba_badtoken++; 1922 return 0; 1923 } 1924 /* NB: assumes IEEE80211_AGGR_IMMEDIATE is 1 */ 1925 if (policy != (tap->txa_flags & IEEE80211_AGGR_IMMEDIATE)) { 1926 IEEE80211_DISCARD_MAC(vap, 1927 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 1928 ni->ni_macaddr, "ADDBA response", 1929 "policy mismatch: expecting %s, " 1930 "received %s, tid %d code %d", 1931 tap->txa_flags & IEEE80211_AGGR_IMMEDIATE, 1932 policy, tid, code); 1933 vap->iv_stats.is_addba_badpolicy++; 1934 return 0; 1935 } 1936#if 0 1937 /* XXX we take MIN in ieee80211_addba_response */ 1938 if (bufsiz > IEEE80211_AGGR_BAWMAX) { 1939 IEEE80211_DISCARD_MAC(vap, 1940 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 1941 ni->ni_macaddr, "ADDBA response", 1942 "BA window too large: max %d, " 1943 "received %d, tid %d code %d", 1944 bufsiz, IEEE80211_AGGR_BAWMAX, tid, code); 1945 vap->iv_stats.is_addba_badbawinsize++; 1946 return 0; 1947 } 1948#endif 1949 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 1950 "recv ADDBA response: dialogtoken %u code %d " 1951 "baparamset 0x%x (tid %d bufsiz %d) batimeout %d", 1952 dialogtoken, code, baparamset, tid, bufsiz, 1953 batimeout); 1954 ic->ic_addba_response(ni, tap, code, baparamset, batimeout); 1955 return 0; 1956} 1957 1958static int 1959ht_recv_action_ba_delba(struct ieee80211_node *ni, 1960 const struct ieee80211_frame *wh, 1961 const uint8_t *frm, const uint8_t *efrm) 1962{ 1963 struct ieee80211com *ic = ni->ni_ic; 1964 struct ieee80211_rx_ampdu *rap; 1965 struct ieee80211_tx_ampdu *tap; 1966 uint16_t baparamset, code; 1967 int tid, ac; 1968 1969 baparamset = LE_READ_2(frm+2); 1970 code = LE_READ_2(frm+4); 1971 1972 tid = MS(baparamset, IEEE80211_DELBAPS_TID); 1973 1974 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 1975 "recv DELBA: baparamset 0x%x (tid %d initiator %d) " 1976 "code %d", baparamset, tid, 1977 MS(baparamset, IEEE80211_DELBAPS_INIT), code); 1978 1979 if ((baparamset & IEEE80211_DELBAPS_INIT) == 0) { 1980 ac = TID_TO_WME_AC(tid); 1981 tap = &ni->ni_tx_ampdu[ac]; 1982 ic->ic_addba_stop(ni, tap); 1983 } else { 1984 rap = &ni->ni_rx_ampdu[tid]; 1985 ic->ic_ampdu_rx_stop(ni, rap); 1986 } 1987 return 0; 1988} 1989 1990static int 1991ht_recv_action_ht_txchwidth(struct ieee80211_node *ni, 1992 const struct ieee80211_frame *wh, 1993 const uint8_t *frm, const uint8_t *efrm) 1994{ 1995 int chw; 1996 1997 chw = (frm[2] == IEEE80211_A_HT_TXCHWIDTH_2040) ? 40 : 20; 1998 1999 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 2000 "%s: HT txchwidth, width %d%s", 2001 __func__, chw, ni->ni_chw != chw ? "*" : ""); 2002 if (chw != ni->ni_chw) { 2003 ni->ni_chw = chw; 2004 /* XXX notify on change */ 2005 } 2006 return 0; 2007} 2008 2009static int 2010ht_recv_action_ht_mimopwrsave(struct ieee80211_node *ni, 2011 const struct ieee80211_frame *wh, 2012 const uint8_t *frm, const uint8_t *efrm) 2013{ 2014 const struct ieee80211_action_ht_mimopowersave *mps = 2015 (const struct ieee80211_action_ht_mimopowersave *) frm; 2016 2017 /* XXX check iv_htcaps */ 2018 if (mps->am_control & IEEE80211_A_HT_MIMOPWRSAVE_ENA) 2019 ni->ni_flags |= IEEE80211_NODE_MIMO_PS; 2020 else 2021 ni->ni_flags &= ~IEEE80211_NODE_MIMO_PS; 2022 if (mps->am_control & IEEE80211_A_HT_MIMOPWRSAVE_MODE) 2023 ni->ni_flags |= IEEE80211_NODE_MIMO_RTS; 2024 else 2025 ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS; 2026 /* XXX notify on change */ 2027 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 2028 "%s: HT MIMO PS (%s%s)", __func__, 2029 (ni->ni_flags & IEEE80211_NODE_MIMO_PS) ? "on" : "off", 2030 (ni->ni_flags & IEEE80211_NODE_MIMO_RTS) ? "+rts" : "" 2031 ); 2032 return 0; 2033} 2034 2035/* 2036 * Transmit processing. 2037 */ 2038 2039/* 2040 * Check if A-MPDU should be requested/enabled for a stream. 2041 * We require a traffic rate above a per-AC threshold and we 2042 * also handle backoff from previous failed attempts. 2043 * 2044 * Drivers may override this method to bring in information 2045 * such as link state conditions in making the decision. 2046 */ 2047static int 2048ieee80211_ampdu_enable(struct ieee80211_node *ni, 2049 struct ieee80211_tx_ampdu *tap) 2050{ 2051 struct ieee80211vap *vap = ni->ni_vap; 2052 2053 if (tap->txa_avgpps < vap->iv_ampdu_mintraffic[tap->txa_ac]) 2054 return 0; 2055 /* XXX check rssi? */ 2056 if (tap->txa_attempts >= ieee80211_addba_maxtries && 2057 ticks < tap->txa_nextrequest) { 2058 /* 2059 * Don't retry too often; txa_nextrequest is set 2060 * to the minimum interval we'll retry after 2061 * ieee80211_addba_maxtries failed attempts are made. 2062 */ 2063 return 0; 2064 } 2065 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni, 2066 "enable AMPDU on %s, avgpps %d pkts %d", 2067 ieee80211_wme_acnames[tap->txa_ac], tap->txa_avgpps, tap->txa_pkts); 2068 return 1; 2069} 2070 2071/* 2072 * Request A-MPDU tx aggregation. Setup local state and 2073 * issue an ADDBA request. BA use will only happen after 2074 * the other end replies with ADDBA response. 2075 */ 2076int 2077ieee80211_ampdu_request(struct ieee80211_node *ni, 2078 struct ieee80211_tx_ampdu *tap) 2079{ 2080 struct ieee80211com *ic = ni->ni_ic; 2081 uint16_t args[5]; 2082 int tid, dialogtoken; 2083 static int tokens = 0; /* XXX */ 2084 2085 /* XXX locking */ 2086 if ((tap->txa_flags & IEEE80211_AGGR_SETUP) == 0) { 2087 /* do deferred setup of state */ 2088 ampdu_tx_setup(tap); 2089 } 2090 /* XXX hack for not doing proper locking */ 2091 tap->txa_flags &= ~IEEE80211_AGGR_NAK; 2092 2093 dialogtoken = (tokens+1) % 63; /* XXX */ 2094 tid = WME_AC_TO_TID(tap->txa_ac); 2095 tap->txa_start = ni->ni_txseqs[tid]; 2096 2097 args[0] = dialogtoken; 2098 args[1] = 0; /* NB: status code not used */ 2099 args[2] = IEEE80211_BAPS_POLICY_IMMEDIATE 2100 | SM(tid, IEEE80211_BAPS_TID) 2101 | SM(IEEE80211_AGGR_BAWMAX, IEEE80211_BAPS_BUFSIZ) 2102 ; 2103 args[3] = 0; /* batimeout */ 2104 /* NB: do first so there's no race against reply */ 2105 if (!ic->ic_addba_request(ni, tap, dialogtoken, args[2], args[3])) { 2106 /* unable to setup state, don't make request */ 2107 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 2108 ni, "%s: could not setup BA stream for AC %d", 2109 __func__, tap->txa_ac); 2110 /* defer next try so we don't slam the driver with requests */ 2111 tap->txa_attempts = ieee80211_addba_maxtries; 2112 /* NB: check in case driver wants to override */ 2113 if (tap->txa_nextrequest <= ticks) 2114 tap->txa_nextrequest = ticks + ieee80211_addba_backoff; 2115 return 0; 2116 } 2117 tokens = dialogtoken; /* allocate token */ 2118 /* NB: after calling ic_addba_request so driver can set txa_start */ 2119 args[4] = SM(tap->txa_start, IEEE80211_BASEQ_START) 2120 | SM(0, IEEE80211_BASEQ_FRAG) 2121 ; 2122 return ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA, 2123 IEEE80211_ACTION_BA_ADDBA_REQUEST, args); 2124} 2125 2126/* 2127 * Terminate an AMPDU tx stream. State is reclaimed 2128 * and the peer notified with a DelBA Action frame. 2129 */ 2130void 2131ieee80211_ampdu_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 2132 int reason) 2133{ 2134 struct ieee80211com *ic = ni->ni_ic; 2135 struct ieee80211vap *vap = ni->ni_vap; 2136 uint16_t args[4]; 2137 2138 /* XXX locking */ 2139 tap->txa_flags &= ~IEEE80211_AGGR_BARPEND; 2140 if (IEEE80211_AMPDU_RUNNING(tap)) { 2141 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 2142 ni, "%s: stop BA stream for AC %d (reason %d)", 2143 __func__, tap->txa_ac, reason); 2144 vap->iv_stats.is_ampdu_stop++; 2145 2146 ic->ic_addba_stop(ni, tap); 2147 args[0] = WME_AC_TO_TID(tap->txa_ac); 2148 args[1] = IEEE80211_DELBAPS_INIT; 2149 args[2] = reason; /* XXX reason code */ 2150 ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA, 2151 IEEE80211_ACTION_BA_DELBA, args); 2152 } else { 2153 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 2154 ni, "%s: BA stream for AC %d not running (reason %d)", 2155 __func__, tap->txa_ac, reason); 2156 vap->iv_stats.is_ampdu_stop_failed++; 2157 } 2158} 2159 2160static void 2161bar_timeout(void *arg) 2162{ 2163 struct ieee80211_tx_ampdu *tap = arg; 2164 struct ieee80211_node *ni = tap->txa_ni; 2165 2166 KASSERT((tap->txa_flags & IEEE80211_AGGR_XCHGPEND) == 0, 2167 ("bar/addba collision, flags 0x%x", tap->txa_flags)); 2168 2169 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 2170 ni, "%s: tid %u flags 0x%x attempts %d", __func__, 2171 tap->txa_ac, tap->txa_flags, tap->txa_attempts); 2172 2173 /* guard against race with bar_tx_complete */ 2174 if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) == 0) 2175 return; 2176 /* XXX ? */ 2177 if (tap->txa_attempts >= ieee80211_bar_maxtries) 2178 ieee80211_ampdu_stop(ni, tap, IEEE80211_REASON_TIMEOUT); 2179 else 2180 ieee80211_send_bar(ni, tap, tap->txa_seqpending); 2181} 2182 2183static void 2184bar_start_timer(struct ieee80211_tx_ampdu *tap) 2185{ 2186 callout_reset(&tap->txa_timer, ieee80211_bar_timeout, bar_timeout, tap); 2187} 2188 2189static void 2190bar_stop_timer(struct ieee80211_tx_ampdu *tap) 2191{ 2192 callout_stop(&tap->txa_timer); 2193} 2194 2195static void 2196bar_tx_complete(struct ieee80211_node *ni, void *arg, int status) 2197{ 2198 struct ieee80211_tx_ampdu *tap = arg; 2199 2200 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 2201 ni, "%s: tid %u flags 0x%x pending %d status %d", 2202 __func__, tap->txa_ac, tap->txa_flags, 2203 callout_pending(&tap->txa_timer), status); 2204 2205 /* XXX locking */ 2206 if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) && 2207 callout_pending(&tap->txa_timer)) { 2208 struct ieee80211com *ic = ni->ni_ic; 2209 2210 if (status == 0) /* ACK'd */ 2211 bar_stop_timer(tap); 2212 ic->ic_bar_response(ni, tap, status); 2213 /* NB: just let timer expire so we pace requests */ 2214 } 2215} 2216 2217static void 2218ieee80211_bar_response(struct ieee80211_node *ni, 2219 struct ieee80211_tx_ampdu *tap, int status) 2220{ 2221 2222 if (status == 0) { /* got ACK */ 2223 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 2224 ni, "BAR moves BA win <%u:%u> (%u frames) txseq %u tid %u", 2225 tap->txa_start, 2226 IEEE80211_SEQ_ADD(tap->txa_start, tap->txa_wnd-1), 2227 tap->txa_qframes, tap->txa_seqpending, 2228 WME_AC_TO_TID(tap->txa_ac)); 2229 2230 /* NB: timer already stopped in bar_tx_complete */ 2231 tap->txa_start = tap->txa_seqpending; 2232 tap->txa_flags &= ~IEEE80211_AGGR_BARPEND; 2233 } 2234} 2235 2236/* 2237 * Transmit a BAR frame to the specified node. The 2238 * BAR contents are drawn from the supplied aggregation 2239 * state associated with the node. 2240 * 2241 * NB: we only handle immediate ACK w/ compressed bitmap. 2242 */ 2243int 2244ieee80211_send_bar(struct ieee80211_node *ni, 2245 struct ieee80211_tx_ampdu *tap, ieee80211_seq seq) 2246{ 2247#define senderr(_x, _v) do { vap->iv_stats._v++; ret = _x; goto bad; } while (0) 2248 struct ieee80211vap *vap = ni->ni_vap; 2249 struct ieee80211com *ic = ni->ni_ic; 2250 struct ieee80211_frame_bar *bar; 2251 struct mbuf *m; 2252 uint16_t barctl, barseqctl; 2253 uint8_t *frm; 2254 int tid, ret; 2255 2256 if ((tap->txa_flags & IEEE80211_AGGR_RUNNING) == 0) { 2257 /* no ADDBA response, should not happen */ 2258 /* XXX stat+msg */ 2259 return EINVAL; 2260 } 2261 /* XXX locking */ 2262 bar_stop_timer(tap); 2263 2264 ieee80211_ref_node(ni); 2265 2266 m = ieee80211_getmgtframe(&frm, ic->ic_headroom, sizeof(*bar)); 2267 if (m == NULL) 2268 senderr(ENOMEM, is_tx_nobuf); 2269 2270 if (!ieee80211_add_callback(m, bar_tx_complete, tap)) { 2271 m_freem(m); 2272 senderr(ENOMEM, is_tx_nobuf); /* XXX */ 2273 /* NOTREACHED */ 2274 } 2275 2276 bar = mtod(m, struct ieee80211_frame_bar *); 2277 bar->i_fc[0] = IEEE80211_FC0_VERSION_0 | 2278 IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_BAR; 2279 bar->i_fc[1] = 0; 2280 IEEE80211_ADDR_COPY(bar->i_ra, ni->ni_macaddr); 2281 IEEE80211_ADDR_COPY(bar->i_ta, vap->iv_myaddr); 2282 2283 tid = WME_AC_TO_TID(tap->txa_ac); 2284 barctl = (tap->txa_flags & IEEE80211_AGGR_IMMEDIATE ? 2285 0 : IEEE80211_BAR_NOACK) 2286 | IEEE80211_BAR_COMP 2287 | SM(tid, IEEE80211_BAR_TID) 2288 ; 2289 barseqctl = SM(seq, IEEE80211_BAR_SEQ_START); 2290 /* NB: known to have proper alignment */ 2291 bar->i_ctl = htole16(barctl); 2292 bar->i_seq = htole16(barseqctl); 2293 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_bar); 2294 2295 M_WME_SETAC(m, WME_AC_VO); 2296 2297 IEEE80211_NODE_STAT(ni, tx_mgmt); /* XXX tx_ctl? */ 2298 2299 /* XXX locking */ 2300 /* init/bump attempts counter */ 2301 if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) == 0) 2302 tap->txa_attempts = 1; 2303 else 2304 tap->txa_attempts++; 2305 tap->txa_seqpending = seq; 2306 tap->txa_flags |= IEEE80211_AGGR_BARPEND; 2307 2308 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_11N, 2309 ni, "send BAR: tid %u ctl 0x%x start %u (attempt %d)", 2310 tid, barctl, seq, tap->txa_attempts); 2311 2312 /* 2313 * ic_raw_xmit will free the node reference 2314 * regardless of queue/TX success or failure. 2315 */ 2316 ret = ic->ic_raw_xmit(ni, m, NULL); 2317 if (ret != 0) { 2318 /* xmit failed, clear state flag */ 2319 tap->txa_flags &= ~IEEE80211_AGGR_BARPEND; 2320 return ret; 2321 } 2322 /* XXX hack against tx complete happening before timer is started */ 2323 if (tap->txa_flags & IEEE80211_AGGR_BARPEND) 2324 bar_start_timer(tap); 2325 return 0; 2326bad: 2327 ieee80211_free_node(ni); 2328 return ret; 2329#undef senderr 2330} 2331 2332static int 2333ht_action_output(struct ieee80211_node *ni, struct mbuf *m) 2334{ 2335 struct ieee80211_bpf_params params; 2336 2337 memset(¶ms, 0, sizeof(params)); 2338 params.ibp_pri = WME_AC_VO; 2339 params.ibp_rate0 = ni->ni_txparms->mgmtrate; 2340 /* NB: we know all frames are unicast */ 2341 params.ibp_try0 = ni->ni_txparms->maxretry; 2342 params.ibp_power = ni->ni_txpower; 2343 return ieee80211_mgmt_output(ni, m, IEEE80211_FC0_SUBTYPE_ACTION, 2344 ¶ms); 2345} 2346 2347#define ADDSHORT(frm, v) do { \ 2348 frm[0] = (v) & 0xff; \ 2349 frm[1] = (v) >> 8; \ 2350 frm += 2; \ 2351} while (0) 2352 2353/* 2354 * Send an action management frame. The arguments are stuff 2355 * into a frame without inspection; the caller is assumed to 2356 * prepare them carefully (e.g. based on the aggregation state). 2357 */ 2358static int 2359ht_send_action_ba_addba(struct ieee80211_node *ni, 2360 int category, int action, void *arg0) 2361{ 2362 struct ieee80211vap *vap = ni->ni_vap; 2363 struct ieee80211com *ic = ni->ni_ic; 2364 uint16_t *args = arg0; 2365 struct mbuf *m; 2366 uint8_t *frm; 2367 2368 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 2369 "send ADDBA %s: dialogtoken %d status %d " 2370 "baparamset 0x%x (tid %d) batimeout 0x%x baseqctl 0x%x", 2371 (action == IEEE80211_ACTION_BA_ADDBA_REQUEST) ? 2372 "request" : "response", 2373 args[0], args[1], args[2], MS(args[2], IEEE80211_BAPS_TID), 2374 args[3], args[4]); 2375 2376 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2377 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2378 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2379 ieee80211_ref_node(ni); 2380 2381 m = ieee80211_getmgtframe(&frm, 2382 ic->ic_headroom + sizeof(struct ieee80211_frame), 2383 sizeof(uint16_t) /* action+category */ 2384 /* XXX may action payload */ 2385 + sizeof(struct ieee80211_action_ba_addbaresponse) 2386 ); 2387 if (m != NULL) { 2388 *frm++ = category; 2389 *frm++ = action; 2390 *frm++ = args[0]; /* dialog token */ 2391 if (action == IEEE80211_ACTION_BA_ADDBA_RESPONSE) 2392 ADDSHORT(frm, args[1]); /* status code */ 2393 ADDSHORT(frm, args[2]); /* baparamset */ 2394 ADDSHORT(frm, args[3]); /* batimeout */ 2395 if (action == IEEE80211_ACTION_BA_ADDBA_REQUEST) 2396 ADDSHORT(frm, args[4]); /* baseqctl */ 2397 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2398 return ht_action_output(ni, m); 2399 } else { 2400 vap->iv_stats.is_tx_nobuf++; 2401 ieee80211_free_node(ni); 2402 return ENOMEM; 2403 } 2404} 2405 2406static int 2407ht_send_action_ba_delba(struct ieee80211_node *ni, 2408 int category, int action, void *arg0) 2409{ 2410 struct ieee80211vap *vap = ni->ni_vap; 2411 struct ieee80211com *ic = ni->ni_ic; 2412 uint16_t *args = arg0; 2413 struct mbuf *m; 2414 uint16_t baparamset; 2415 uint8_t *frm; 2416 2417 baparamset = SM(args[0], IEEE80211_DELBAPS_TID) 2418 | args[1] 2419 ; 2420 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 2421 "send DELBA action: tid %d, initiator %d reason %d", 2422 args[0], args[1], args[2]); 2423 2424 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2425 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2426 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2427 ieee80211_ref_node(ni); 2428 2429 m = ieee80211_getmgtframe(&frm, 2430 ic->ic_headroom + sizeof(struct ieee80211_frame), 2431 sizeof(uint16_t) /* action+category */ 2432 /* XXX may action payload */ 2433 + sizeof(struct ieee80211_action_ba_addbaresponse) 2434 ); 2435 if (m != NULL) { 2436 *frm++ = category; 2437 *frm++ = action; 2438 ADDSHORT(frm, baparamset); 2439 ADDSHORT(frm, args[2]); /* reason code */ 2440 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2441 return ht_action_output(ni, m); 2442 } else { 2443 vap->iv_stats.is_tx_nobuf++; 2444 ieee80211_free_node(ni); 2445 return ENOMEM; 2446 } 2447} 2448 2449static int 2450ht_send_action_ht_txchwidth(struct ieee80211_node *ni, 2451 int category, int action, void *arg0) 2452{ 2453 struct ieee80211vap *vap = ni->ni_vap; 2454 struct ieee80211com *ic = ni->ni_ic; 2455 struct mbuf *m; 2456 uint8_t *frm; 2457 2458 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 2459 "send HT txchwidth: width %d", 2460 IEEE80211_IS_CHAN_HT40(ni->ni_chan) ? 40 : 20); 2461 2462 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2463 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2464 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2465 ieee80211_ref_node(ni); 2466 2467 m = ieee80211_getmgtframe(&frm, 2468 ic->ic_headroom + sizeof(struct ieee80211_frame), 2469 sizeof(uint16_t) /* action+category */ 2470 /* XXX may action payload */ 2471 + sizeof(struct ieee80211_action_ba_addbaresponse) 2472 ); 2473 if (m != NULL) { 2474 *frm++ = category; 2475 *frm++ = action; 2476 *frm++ = IEEE80211_IS_CHAN_HT40(ni->ni_chan) ? 2477 IEEE80211_A_HT_TXCHWIDTH_2040 : 2478 IEEE80211_A_HT_TXCHWIDTH_20; 2479 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2480 return ht_action_output(ni, m); 2481 } else { 2482 vap->iv_stats.is_tx_nobuf++; 2483 ieee80211_free_node(ni); 2484 return ENOMEM; 2485 } 2486} 2487#undef ADDSHORT 2488 2489/* 2490 * Construct the MCS bit mask for inclusion in an HT capabilities 2491 * information element. 2492 */ 2493static void 2494ieee80211_set_mcsset(struct ieee80211com *ic, uint8_t *frm) 2495{ 2496 int i; 2497 uint8_t txparams; 2498 2499 KASSERT((ic->ic_rxstream > 0 && ic->ic_rxstream <= 4), 2500 ("ic_rxstream %d out of range", ic->ic_rxstream)); 2501 KASSERT((ic->ic_txstream > 0 && ic->ic_txstream <= 4), 2502 ("ic_txstream %d out of range", ic->ic_txstream)); 2503 2504 for (i = 0; i < ic->ic_rxstream * 8; i++) 2505 setbit(frm, i); 2506 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) && 2507 (ic->ic_htcaps & IEEE80211_HTC_RXMCS32)) 2508 setbit(frm, 32); 2509 if (ic->ic_htcaps & IEEE80211_HTC_RXUNEQUAL) { 2510 if (ic->ic_rxstream >= 2) { 2511 for (i = 33; i <= 38; i++) 2512 setbit(frm, i); 2513 } 2514 if (ic->ic_rxstream >= 3) { 2515 for (i = 39; i <= 52; i++) 2516 setbit(frm, i); 2517 } 2518 if (ic->ic_txstream >= 4) { 2519 for (i = 53; i <= 76; i++) 2520 setbit(frm, i); 2521 } 2522 } 2523 2524 if (ic->ic_rxstream != ic->ic_txstream) { 2525 txparams = 0x1; /* TX MCS set defined */ 2526 txparams |= 0x2; /* TX RX MCS not equal */ 2527 txparams |= (ic->ic_txstream - 1) << 2; /* num TX streams */ 2528 if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL) 2529 txparams |= 0x16; /* TX unequal modulation sup */ 2530 } else 2531 txparams = 0; 2532 frm[12] = txparams; 2533} 2534 2535/* 2536 * Add body of an HTCAP information element. 2537 */ 2538static uint8_t * 2539ieee80211_add_htcap_body(uint8_t *frm, struct ieee80211_node *ni) 2540{ 2541#define ADDSHORT(frm, v) do { \ 2542 frm[0] = (v) & 0xff; \ 2543 frm[1] = (v) >> 8; \ 2544 frm += 2; \ 2545} while (0) 2546 struct ieee80211com *ic = ni->ni_ic; 2547 struct ieee80211vap *vap = ni->ni_vap; 2548 uint16_t caps, extcaps; 2549 int rxmax, density; 2550 2551 /* HT capabilities */ 2552 caps = vap->iv_htcaps & 0xffff; 2553 /* 2554 * Note channel width depends on whether we are operating as 2555 * a sta or not. When operating as a sta we are generating 2556 * a request based on our desired configuration. Otherwise 2557 * we are operational and the channel attributes identify 2558 * how we've been setup (which might be different if a fixed 2559 * channel is specified). 2560 */ 2561 if (vap->iv_opmode == IEEE80211_M_STA) { 2562 /* override 20/40 use based on config */ 2563 if (vap->iv_flags_ht & IEEE80211_FHT_USEHT40) 2564 caps |= IEEE80211_HTCAP_CHWIDTH40; 2565 else 2566 caps &= ~IEEE80211_HTCAP_CHWIDTH40; 2567 /* use advertised setting (XXX locally constraint) */ 2568 rxmax = MS(ni->ni_htparam, IEEE80211_HTCAP_MAXRXAMPDU); 2569 density = MS(ni->ni_htparam, IEEE80211_HTCAP_MPDUDENSITY); 2570 2571 /* 2572 * NB: Hardware might support HT40 on some but not all 2573 * channels. We can't determine this earlier because only 2574 * after association the channel is upgraded to HT based 2575 * on the negotiated capabilities. 2576 */ 2577 if (ni->ni_chan != IEEE80211_CHAN_ANYC && 2578 findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT40U) == NULL && 2579 findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT40D) == NULL) 2580 caps &= ~IEEE80211_HTCAP_CHWIDTH40; 2581 } else { 2582 /* override 20/40 use based on current channel */ 2583 if (IEEE80211_IS_CHAN_HT40(ni->ni_chan)) 2584 caps |= IEEE80211_HTCAP_CHWIDTH40; 2585 else 2586 caps &= ~IEEE80211_HTCAP_CHWIDTH40; 2587 rxmax = vap->iv_ampdu_rxmax; 2588 density = vap->iv_ampdu_density; 2589 } 2590 /* adjust short GI based on channel and config */ 2591 if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20) == 0) 2592 caps &= ~IEEE80211_HTCAP_SHORTGI20; 2593 if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40) == 0 || 2594 (caps & IEEE80211_HTCAP_CHWIDTH40) == 0) 2595 caps &= ~IEEE80211_HTCAP_SHORTGI40; 2596 ADDSHORT(frm, caps); 2597 2598 /* HT parameters */ 2599 *frm = SM(rxmax, IEEE80211_HTCAP_MAXRXAMPDU) 2600 | SM(density, IEEE80211_HTCAP_MPDUDENSITY) 2601 ; 2602 frm++; 2603 2604 /* pre-zero remainder of ie */ 2605 memset(frm, 0, sizeof(struct ieee80211_ie_htcap) - 2606 __offsetof(struct ieee80211_ie_htcap, hc_mcsset)); 2607 2608 /* supported MCS set */ 2609 /* 2610 * XXX: For sta mode the rate set should be restricted based 2611 * on the AP's capabilities, but ni_htrates isn't setup when 2612 * we're called to form an AssocReq frame so for now we're 2613 * restricted to the device capabilities. 2614 */ 2615 ieee80211_set_mcsset(ni->ni_ic, frm); 2616 2617 frm += __offsetof(struct ieee80211_ie_htcap, hc_extcap) - 2618 __offsetof(struct ieee80211_ie_htcap, hc_mcsset); 2619 2620 /* HT extended capabilities */ 2621 extcaps = vap->iv_htextcaps & 0xffff; 2622 2623 ADDSHORT(frm, extcaps); 2624 2625 frm += sizeof(struct ieee80211_ie_htcap) - 2626 __offsetof(struct ieee80211_ie_htcap, hc_txbf); 2627 2628 return frm; 2629#undef ADDSHORT 2630} 2631 2632/* 2633 * Add 802.11n HT capabilities information element 2634 */ 2635uint8_t * 2636ieee80211_add_htcap(uint8_t *frm, struct ieee80211_node *ni) 2637{ 2638 frm[0] = IEEE80211_ELEMID_HTCAP; 2639 frm[1] = sizeof(struct ieee80211_ie_htcap) - 2; 2640 return ieee80211_add_htcap_body(frm + 2, ni); 2641} 2642 2643/* 2644 * Add Broadcom OUI wrapped standard HTCAP ie; this is 2645 * used for compatibility w/ pre-draft implementations. 2646 */ 2647uint8_t * 2648ieee80211_add_htcap_vendor(uint8_t *frm, struct ieee80211_node *ni) 2649{ 2650 frm[0] = IEEE80211_ELEMID_VENDOR; 2651 frm[1] = 4 + sizeof(struct ieee80211_ie_htcap) - 2; 2652 frm[2] = (BCM_OUI >> 0) & 0xff; 2653 frm[3] = (BCM_OUI >> 8) & 0xff; 2654 frm[4] = (BCM_OUI >> 16) & 0xff; 2655 frm[5] = BCM_OUI_HTCAP; 2656 return ieee80211_add_htcap_body(frm + 6, ni); 2657} 2658 2659/* 2660 * Construct the MCS bit mask of basic rates 2661 * for inclusion in an HT information element. 2662 */ 2663static void 2664ieee80211_set_basic_htrates(uint8_t *frm, const struct ieee80211_htrateset *rs) 2665{ 2666 int i; 2667 2668 for (i = 0; i < rs->rs_nrates; i++) { 2669 int r = rs->rs_rates[i] & IEEE80211_RATE_VAL; 2670 if ((rs->rs_rates[i] & IEEE80211_RATE_BASIC) && 2671 r < IEEE80211_HTRATE_MAXSIZE) { 2672 /* NB: this assumes a particular implementation */ 2673 setbit(frm, r); 2674 } 2675 } 2676} 2677 2678/* 2679 * Update the HTINFO ie for a beacon frame. 2680 */ 2681void 2682ieee80211_ht_update_beacon(struct ieee80211vap *vap, 2683 struct ieee80211_beacon_offsets *bo) 2684{ 2685#define PROTMODE (IEEE80211_HTINFO_OPMODE|IEEE80211_HTINFO_NONHT_PRESENT) 2686 const struct ieee80211_channel *bsschan = vap->iv_bss->ni_chan; 2687 struct ieee80211com *ic = vap->iv_ic; 2688 struct ieee80211_ie_htinfo *ht = 2689 (struct ieee80211_ie_htinfo *) bo->bo_htinfo; 2690 2691 /* XXX only update on channel change */ 2692 ht->hi_ctrlchannel = ieee80211_chan2ieee(ic, bsschan); 2693 if (vap->iv_flags_ht & IEEE80211_FHT_RIFS) 2694 ht->hi_byte1 = IEEE80211_HTINFO_RIFSMODE_PERM; 2695 else 2696 ht->hi_byte1 = IEEE80211_HTINFO_RIFSMODE_PROH; 2697 if (IEEE80211_IS_CHAN_HT40U(bsschan)) 2698 ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_ABOVE; 2699 else if (IEEE80211_IS_CHAN_HT40D(bsschan)) 2700 ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_BELOW; 2701 else 2702 ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_NONE; 2703 if (IEEE80211_IS_CHAN_HT40(bsschan)) 2704 ht->hi_byte1 |= IEEE80211_HTINFO_TXWIDTH_2040; 2705 2706 /* protection mode */ 2707 ht->hi_byte2 = (ht->hi_byte2 &~ PROTMODE) | ic->ic_curhtprotmode; 2708 2709 /* XXX propagate to vendor ie's */ 2710#undef PROTMODE 2711} 2712 2713/* 2714 * Add body of an HTINFO information element. 2715 * 2716 * NB: We don't use struct ieee80211_ie_htinfo because we can 2717 * be called to fillin both a standard ie and a compat ie that 2718 * has a vendor OUI at the front. 2719 */ 2720static uint8_t * 2721ieee80211_add_htinfo_body(uint8_t *frm, struct ieee80211_node *ni) 2722{ 2723 struct ieee80211vap *vap = ni->ni_vap; 2724 struct ieee80211com *ic = ni->ni_ic; 2725 2726 /* pre-zero remainder of ie */ 2727 memset(frm, 0, sizeof(struct ieee80211_ie_htinfo) - 2); 2728 2729 /* primary/control channel center */ 2730 *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan); 2731 2732 if (vap->iv_flags_ht & IEEE80211_FHT_RIFS) 2733 frm[0] = IEEE80211_HTINFO_RIFSMODE_PERM; 2734 else 2735 frm[0] = IEEE80211_HTINFO_RIFSMODE_PROH; 2736 if (IEEE80211_IS_CHAN_HT40U(ni->ni_chan)) 2737 frm[0] |= IEEE80211_HTINFO_2NDCHAN_ABOVE; 2738 else if (IEEE80211_IS_CHAN_HT40D(ni->ni_chan)) 2739 frm[0] |= IEEE80211_HTINFO_2NDCHAN_BELOW; 2740 else 2741 frm[0] |= IEEE80211_HTINFO_2NDCHAN_NONE; 2742 if (IEEE80211_IS_CHAN_HT40(ni->ni_chan)) 2743 frm[0] |= IEEE80211_HTINFO_TXWIDTH_2040; 2744 2745 frm[1] = ic->ic_curhtprotmode; 2746 2747 frm += 5; 2748 2749 /* basic MCS set */ 2750 ieee80211_set_basic_htrates(frm, &ni->ni_htrates); 2751 frm += sizeof(struct ieee80211_ie_htinfo) - 2752 __offsetof(struct ieee80211_ie_htinfo, hi_basicmcsset); 2753 return frm; 2754} 2755 2756/* 2757 * Add 802.11n HT information information element. 2758 */ 2759uint8_t * 2760ieee80211_add_htinfo(uint8_t *frm, struct ieee80211_node *ni) 2761{ 2762 frm[0] = IEEE80211_ELEMID_HTINFO; 2763 frm[1] = sizeof(struct ieee80211_ie_htinfo) - 2; 2764 return ieee80211_add_htinfo_body(frm + 2, ni); 2765} 2766 2767/* 2768 * Add Broadcom OUI wrapped standard HTINFO ie; this is 2769 * used for compatibility w/ pre-draft implementations. 2770 */ 2771uint8_t * 2772ieee80211_add_htinfo_vendor(uint8_t *frm, struct ieee80211_node *ni) 2773{ 2774 frm[0] = IEEE80211_ELEMID_VENDOR; 2775 frm[1] = 4 + sizeof(struct ieee80211_ie_htinfo) - 2; 2776 frm[2] = (BCM_OUI >> 0) & 0xff; 2777 frm[3] = (BCM_OUI >> 8) & 0xff; 2778 frm[4] = (BCM_OUI >> 16) & 0xff; 2779 frm[5] = BCM_OUI_HTINFO; 2780 return ieee80211_add_htinfo_body(frm + 6, ni); 2781} 2782