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("$FreeBSD$"); 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/malloc.h> 41 #include <sys/systm.h> 42 #include <sys/endian.h> 43 44 #include <sys/socket.h> 45 46 #include <net/if.h> 47 #include <net/if_var.h> 48 #include <net/if_media.h> 49 #include <net/ethernet.h> 50 51 #include <net80211/ieee80211_var.h> 52 #include <net80211/ieee80211_action.h> 53 #include <net80211/ieee80211_input.h> 54 55 /* define here, used throughout file */ 56 #define MS(_v, _f) (((_v) & _f) >> _f##_S) 57 #define SM(_v, _f) (((_v) << _f##_S) & _f) 58 59 const struct ieee80211_mcs_rates ieee80211_htrates[IEEE80211_HTRATE_MAXSIZE] = { 60 { 13, 14, 27, 30 }, /* MCS 0 */ 61 { 26, 29, 54, 60 }, /* MCS 1 */ 62 { 39, 43, 81, 90 }, /* MCS 2 */ 63 { 52, 58, 108, 120 }, /* MCS 3 */ 64 { 78, 87, 162, 180 }, /* MCS 4 */ 65 { 104, 116, 216, 240 }, /* MCS 5 */ 66 { 117, 130, 243, 270 }, /* MCS 6 */ 67 { 130, 144, 270, 300 }, /* MCS 7 */ 68 { 26, 29, 54, 60 }, /* MCS 8 */ 69 { 52, 58, 108, 120 }, /* MCS 9 */ 70 { 78, 87, 162, 180 }, /* MCS 10 */ 71 { 104, 116, 216, 240 }, /* MCS 11 */ 72 { 156, 173, 324, 360 }, /* MCS 12 */ 73 { 208, 231, 432, 480 }, /* MCS 13 */ 74 { 234, 260, 486, 540 }, /* MCS 14 */ 75 { 260, 289, 540, 600 }, /* MCS 15 */ 76 { 39, 43, 81, 90 }, /* MCS 16 */ 77 { 78, 87, 162, 180 }, /* MCS 17 */ 78 { 117, 130, 243, 270 }, /* MCS 18 */ 79 { 156, 173, 324, 360 }, /* MCS 19 */ 80 { 234, 260, 486, 540 }, /* MCS 20 */ 81 { 312, 347, 648, 720 }, /* MCS 21 */ 82 { 351, 390, 729, 810 }, /* MCS 22 */ 83 { 390, 433, 810, 900 }, /* MCS 23 */ 84 { 52, 58, 108, 120 }, /* MCS 24 */ 85 { 104, 116, 216, 240 }, /* MCS 25 */ 86 { 156, 173, 324, 360 }, /* MCS 26 */ 87 { 208, 231, 432, 480 }, /* MCS 27 */ 88 { 312, 347, 648, 720 }, /* MCS 28 */ 89 { 416, 462, 864, 960 }, /* MCS 29 */ 90 { 468, 520, 972, 1080 }, /* MCS 30 */ 91 { 520, 578, 1080, 1200 }, /* MCS 31 */ 92 { 0, 0, 12, 13 }, /* MCS 32 */ 93 { 78, 87, 162, 180 }, /* MCS 33 */ 94 { 104, 116, 216, 240 }, /* MCS 34 */ 95 { 130, 144, 270, 300 }, /* MCS 35 */ 96 { 117, 130, 243, 270 }, /* MCS 36 */ 97 { 156, 173, 324, 360 }, /* MCS 37 */ 98 { 195, 217, 405, 450 }, /* MCS 38 */ 99 { 104, 116, 216, 240 }, /* MCS 39 */ 100 { 130, 144, 270, 300 }, /* MCS 40 */ 101 { 130, 144, 270, 300 }, /* MCS 41 */ 102 { 156, 173, 324, 360 }, /* MCS 42 */ 103 { 182, 202, 378, 420 }, /* MCS 43 */ 104 { 182, 202, 378, 420 }, /* MCS 44 */ 105 { 208, 231, 432, 480 }, /* MCS 45 */ 106 { 156, 173, 324, 360 }, /* MCS 46 */ 107 { 195, 217, 405, 450 }, /* MCS 47 */ 108 { 195, 217, 405, 450 }, /* MCS 48 */ 109 { 234, 260, 486, 540 }, /* MCS 49 */ 110 { 273, 303, 567, 630 }, /* MCS 50 */ 111 { 273, 303, 567, 630 }, /* MCS 51 */ 112 { 312, 347, 648, 720 }, /* MCS 52 */ 113 { 130, 144, 270, 300 }, /* MCS 53 */ 114 { 156, 173, 324, 360 }, /* MCS 54 */ 115 { 182, 202, 378, 420 }, /* MCS 55 */ 116 { 156, 173, 324, 360 }, /* MCS 56 */ 117 { 182, 202, 378, 420 }, /* MCS 57 */ 118 { 208, 231, 432, 480 }, /* MCS 58 */ 119 { 234, 260, 486, 540 }, /* MCS 59 */ 120 { 208, 231, 432, 480 }, /* MCS 60 */ 121 { 234, 260, 486, 540 }, /* MCS 61 */ 122 { 260, 289, 540, 600 }, /* MCS 62 */ 123 { 260, 289, 540, 600 }, /* MCS 63 */ 124 { 286, 318, 594, 660 }, /* MCS 64 */ 125 { 195, 217, 405, 450 }, /* MCS 65 */ 126 { 234, 260, 486, 540 }, /* MCS 66 */ 127 { 273, 303, 567, 630 }, /* MCS 67 */ 128 { 234, 260, 486, 540 }, /* MCS 68 */ 129 { 273, 303, 567, 630 }, /* MCS 69 */ 130 { 312, 347, 648, 720 }, /* MCS 70 */ 131 { 351, 390, 729, 810 }, /* MCS 71 */ 132 { 312, 347, 648, 720 }, /* MCS 72 */ 133 { 351, 390, 729, 810 }, /* MCS 73 */ 134 { 390, 433, 810, 900 }, /* MCS 74 */ 135 { 390, 433, 810, 900 }, /* MCS 75 */ 136 { 429, 477, 891, 990 }, /* MCS 76 */ 137 }; 138 139 static int ieee80211_ampdu_age = -1; /* threshold for ampdu reorder q (ms) */ 140 SYSCTL_PROC(_net_wlan, OID_AUTO, ampdu_age, CTLTYPE_INT | CTLFLAG_RW, 141 &ieee80211_ampdu_age, 0, ieee80211_sysctl_msecs_ticks, "I", 142 "AMPDU max reorder age (ms)"); 143 144 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)"); 147 148 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, CTLFLAG_RW, 158 &ieee80211_addba_maxtries, 0, "max ADDBA requests sent before backoff"); 159 160 static int ieee80211_bar_timeout = -1; /* timeout waiting for BAR response */ 161 static int ieee80211_bar_maxtries = 50;/* max BAR requests before DELBA */ 162 163 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; 168 169 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; 172 173 static void 174 ieee80211_ht_init(void) 175 { 176 /* 177 * Setup HT parameters that depends on the clock frequency. 178 */ 179 ieee80211_ampdu_age = msecs_to_ticks(500); 180 ieee80211_addba_timeout = msecs_to_ticks(250); 181 ieee80211_addba_backoff = msecs_to_ticks(10*1000); 182 ieee80211_bar_timeout = msecs_to_ticks(250); 183 /* 184 * Register action frame handlers. 185 */ 186 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA, 187 IEEE80211_ACTION_BA_ADDBA_REQUEST, ht_recv_action_ba_addba_request); 188 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA, 189 IEEE80211_ACTION_BA_ADDBA_RESPONSE, ht_recv_action_ba_addba_response); 190 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA, 191 IEEE80211_ACTION_BA_DELBA, ht_recv_action_ba_delba); 192 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_HT, 193 IEEE80211_ACTION_HT_MIMOPWRSAVE, ht_recv_action_ht_mimopwrsave); 194 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_HT, 195 IEEE80211_ACTION_HT_TXCHWIDTH, ht_recv_action_ht_txchwidth); 196 197 ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA, 198 IEEE80211_ACTION_BA_ADDBA_REQUEST, ht_send_action_ba_addba); 199 ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA, 200 IEEE80211_ACTION_BA_ADDBA_RESPONSE, ht_send_action_ba_addba); 201 ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA, 202 IEEE80211_ACTION_BA_DELBA, ht_send_action_ba_delba); 203 ieee80211_send_action_register(IEEE80211_ACTION_CAT_HT, 204 IEEE80211_ACTION_HT_TXCHWIDTH, ht_send_action_ht_txchwidth); 205 } 206 SYSINIT(wlan_ht, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_ht_init, NULL); 207 208 static int ieee80211_ampdu_enable(struct ieee80211_node *ni, 209 struct ieee80211_tx_ampdu *tap); 210 static int ieee80211_addba_request(struct ieee80211_node *ni, 211 struct ieee80211_tx_ampdu *tap, 212 int dialogtoken, int baparamset, int batimeout); 213 static int ieee80211_addba_response(struct ieee80211_node *ni, 214 struct ieee80211_tx_ampdu *tap, 215 int code, int baparamset, int batimeout); 216 static void ieee80211_addba_stop(struct ieee80211_node *ni, 217 struct ieee80211_tx_ampdu *tap); 218 static void null_addba_response_timeout(struct ieee80211_node *ni, 219 struct ieee80211_tx_ampdu *tap); 220 221 static void ieee80211_bar_response(struct ieee80211_node *ni, 222 struct ieee80211_tx_ampdu *tap, int status); 223 static void ampdu_tx_stop(struct ieee80211_tx_ampdu *tap); 224 static void bar_stop_timer(struct ieee80211_tx_ampdu *tap); 225 static int ampdu_rx_start(struct ieee80211_node *, struct ieee80211_rx_ampdu *, 226 int baparamset, int batimeout, int baseqctl); 227 static void ampdu_rx_stop(struct ieee80211_node *, struct ieee80211_rx_ampdu *); 228 229 void 230 ieee80211_ht_attach(struct ieee80211com *ic) 231 { 232 /* setup default aggregation policy */ 233 ic->ic_recv_action = ieee80211_recv_action; 234 ic->ic_send_action = ieee80211_send_action; 235 ic->ic_ampdu_enable = ieee80211_ampdu_enable; 236 ic->ic_addba_request = ieee80211_addba_request; 237 ic->ic_addba_response = ieee80211_addba_response; 238 ic->ic_addba_response_timeout = null_addba_response_timeout; 239 ic->ic_addba_stop = ieee80211_addba_stop; 240 ic->ic_bar_response = ieee80211_bar_response; 241 ic->ic_ampdu_rx_start = ampdu_rx_start; 242 ic->ic_ampdu_rx_stop = ampdu_rx_stop; 243 244 ic->ic_htprotmode = IEEE80211_PROT_RTSCTS; 245 ic->ic_curhtprotmode = IEEE80211_HTINFO_OPMODE_PURE; 246 } 247 248 void 249 ieee80211_ht_detach(struct ieee80211com *ic) 250 { 251 } 252 253 void 254 ieee80211_ht_vattach(struct ieee80211vap *vap) 255 { 256 257 /* driver can override defaults */ 258 vap->iv_ampdu_rxmax = IEEE80211_HTCAP_MAXRXAMPDU_8K; 259 vap->iv_ampdu_density = IEEE80211_HTCAP_MPDUDENSITY_NA; 260 vap->iv_ampdu_limit = vap->iv_ampdu_rxmax; 261 vap->iv_amsdu_limit = vap->iv_htcaps & IEEE80211_HTCAP_MAXAMSDU; 262 /* tx aggregation traffic thresholds */ 263 vap->iv_ampdu_mintraffic[WME_AC_BK] = 128; 264 vap->iv_ampdu_mintraffic[WME_AC_BE] = 64; 265 vap->iv_ampdu_mintraffic[WME_AC_VO] = 32; 266 vap->iv_ampdu_mintraffic[WME_AC_VI] = 32; 267 268 if (vap->iv_htcaps & IEEE80211_HTC_HT) { 269 /* 270 * Device is HT capable; enable all HT-related 271 * facilities by default. 272 * XXX these choices may be too aggressive. 273 */ 274 vap->iv_flags_ht |= IEEE80211_FHT_HT 275 | IEEE80211_FHT_HTCOMPAT 276 ; 277 if (vap->iv_htcaps & IEEE80211_HTCAP_SHORTGI20) 278 vap->iv_flags_ht |= IEEE80211_FHT_SHORTGI20; 279 /* XXX infer from channel list? */ 280 if (vap->iv_htcaps & IEEE80211_HTCAP_CHWIDTH40) { 281 vap->iv_flags_ht |= IEEE80211_FHT_USEHT40; 282 if (vap->iv_htcaps & IEEE80211_HTCAP_SHORTGI40) 283 vap->iv_flags_ht |= IEEE80211_FHT_SHORTGI40; 284 } 285 /* enable RIFS if capable */ 286 if (vap->iv_htcaps & IEEE80211_HTC_RIFS) 287 vap->iv_flags_ht |= IEEE80211_FHT_RIFS; 288 289 /* NB: A-MPDU and A-MSDU rx are mandated, these are tx only */ 290 vap->iv_flags_ht |= IEEE80211_FHT_AMPDU_RX; 291 if (vap->iv_htcaps & IEEE80211_HTC_AMPDU) 292 vap->iv_flags_ht |= IEEE80211_FHT_AMPDU_TX; 293 vap->iv_flags_ht |= IEEE80211_FHT_AMSDU_RX; 294 if (vap->iv_htcaps & IEEE80211_HTC_AMSDU) 295 vap->iv_flags_ht |= IEEE80211_FHT_AMSDU_TX; 296 297 if (vap->iv_htcaps & IEEE80211_HTCAP_TXSTBC) 298 vap->iv_flags_ht |= IEEE80211_FHT_STBC_TX; 299 if (vap->iv_htcaps & IEEE80211_HTCAP_RXSTBC) 300 vap->iv_flags_ht |= IEEE80211_FHT_STBC_RX; 301 302 if (vap->iv_htcaps & IEEE80211_HTCAP_LDPC) 303 vap->iv_flags_ht |= IEEE80211_FHT_LDPC_RX; 304 if (vap->iv_htcaps & IEEE80211_HTC_TXLDPC) 305 vap->iv_flags_ht |= IEEE80211_FHT_LDPC_TX; 306 } 307 /* NB: disable default legacy WDS, too many issues right now */ 308 if (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) 309 vap->iv_flags_ht &= ~IEEE80211_FHT_HT; 310 } 311 312 void 313 ieee80211_ht_vdetach(struct ieee80211vap *vap) 314 { 315 } 316 317 static int 318 ht_getrate(struct ieee80211com *ic, int index, enum ieee80211_phymode mode, 319 int ratetype) 320 { 321 int mword, rate; 322 323 mword = ieee80211_rate2media(ic, index | IEEE80211_RATE_MCS, mode); 324 if (IFM_SUBTYPE(mword) != IFM_IEEE80211_MCS) 325 return (0); 326 switch (ratetype) { 327 case 0: 328 rate = ieee80211_htrates[index].ht20_rate_800ns; 329 break; 330 case 1: 331 rate = ieee80211_htrates[index].ht20_rate_400ns; 332 break; 333 case 2: 334 rate = ieee80211_htrates[index].ht40_rate_800ns; 335 break; 336 default: 337 rate = ieee80211_htrates[index].ht40_rate_400ns; 338 break; 339 } 340 return (rate); 341 } 342 343 static struct printranges { 344 int minmcs; 345 int maxmcs; 346 int txstream; 347 int ratetype; 348 int htcapflags; 349 } ranges[] = { 350 { 0, 7, 1, 0, 0 }, 351 { 8, 15, 2, 0, 0 }, 352 { 16, 23, 3, 0, 0 }, 353 { 24, 31, 4, 0, 0 }, 354 { 32, 0, 1, 2, IEEE80211_HTC_TXMCS32 }, 355 { 33, 38, 2, 0, IEEE80211_HTC_TXUNEQUAL }, 356 { 39, 52, 3, 0, IEEE80211_HTC_TXUNEQUAL }, 357 { 53, 76, 4, 0, IEEE80211_HTC_TXUNEQUAL }, 358 { 0, 0, 0, 0, 0 }, 359 }; 360 361 static void 362 ht_rateprint(struct ieee80211com *ic, enum ieee80211_phymode mode, int ratetype) 363 { 364 int minrate, maxrate; 365 struct printranges *range; 366 367 for (range = ranges; range->txstream != 0; range++) { 368 if (ic->ic_txstream < range->txstream) 369 continue; 370 if (range->htcapflags && 371 (ic->ic_htcaps & range->htcapflags) == 0) 372 continue; 373 if (ratetype < range->ratetype) 374 continue; 375 minrate = ht_getrate(ic, range->minmcs, mode, ratetype); 376 maxrate = ht_getrate(ic, range->maxmcs, mode, ratetype); 377 if (range->maxmcs) { 378 ic_printf(ic, "MCS %d-%d: %d%sMbps - %d%sMbps\n", 379 range->minmcs, range->maxmcs, 380 minrate/2, ((minrate & 0x1) != 0 ? ".5" : ""), 381 maxrate/2, ((maxrate & 0x1) != 0 ? ".5" : "")); 382 } else { 383 ic_printf(ic, "MCS %d: %d%sMbps\n", range->minmcs, 384 minrate/2, ((minrate & 0x1) != 0 ? ".5" : "")); 385 } 386 } 387 } 388 389 static void 390 ht_announce(struct ieee80211com *ic, enum ieee80211_phymode mode) 391 { 392 const char *modestr = ieee80211_phymode_name[mode]; 393 394 ic_printf(ic, "%s MCS 20MHz\n", modestr); 395 ht_rateprint(ic, mode, 0); 396 if (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20) { 397 ic_printf(ic, "%s MCS 20MHz SGI\n", modestr); 398 ht_rateprint(ic, mode, 1); 399 } 400 if (ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) { 401 ic_printf(ic, "%s MCS 40MHz:\n", modestr); 402 ht_rateprint(ic, mode, 2); 403 } 404 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) && 405 (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40)) { 406 ic_printf(ic, "%s MCS 40MHz SGI:\n", modestr); 407 ht_rateprint(ic, mode, 3); 408 } 409 } 410 411 void 412 ieee80211_ht_announce(struct ieee80211com *ic) 413 { 414 415 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) || 416 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) 417 ic_printf(ic, "%dT%dR\n", ic->ic_txstream, ic->ic_rxstream); 418 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA)) 419 ht_announce(ic, IEEE80211_MODE_11NA); 420 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) 421 ht_announce(ic, IEEE80211_MODE_11NG); 422 } 423 424 void 425 ieee80211_init_suphtrates(struct ieee80211com *ic) 426 { 427 #define ADDRATE(x) do { \ 428 htrateset->rs_rates[htrateset->rs_nrates] = x; \ 429 htrateset->rs_nrates++; \ 430 } while (0) 431 struct ieee80211_htrateset *htrateset = &ic->ic_sup_htrates; 432 int i; 433 434 memset(htrateset, 0, sizeof(struct ieee80211_htrateset)); 435 for (i = 0; i < ic->ic_txstream * 8; i++) 436 ADDRATE(i); 437 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) && 438 (ic->ic_htcaps & IEEE80211_HTC_TXMCS32)) 439 ADDRATE(32); 440 if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL) { 441 if (ic->ic_txstream >= 2) { 442 for (i = 33; i <= 38; i++) 443 ADDRATE(i); 444 } 445 if (ic->ic_txstream >= 3) { 446 for (i = 39; i <= 52; i++) 447 ADDRATE(i); 448 } 449 if (ic->ic_txstream == 4) { 450 for (i = 53; i <= 76; i++) 451 ADDRATE(i); 452 } 453 } 454 #undef ADDRATE 455 } 456 457 /* 458 * Receive processing. 459 */ 460 461 /* 462 * Decap the encapsulated A-MSDU frames and dispatch all but 463 * the last for delivery. The last frame is returned for 464 * delivery via the normal path. 465 */ 466 struct mbuf * 467 ieee80211_decap_amsdu(struct ieee80211_node *ni, struct mbuf *m) 468 { 469 struct ieee80211vap *vap = ni->ni_vap; 470 int framelen; 471 struct mbuf *n; 472 473 /* discard 802.3 header inserted by ieee80211_decap */ 474 m_adj(m, sizeof(struct ether_header)); 475 476 vap->iv_stats.is_amsdu_decap++; 477 478 for (;;) { 479 /* 480 * Decap the first frame, bust it apart from the 481 * remainder and deliver. We leave the last frame 482 * delivery to the caller (for consistency with other 483 * code paths, could also do it here). 484 */ 485 m = ieee80211_decap1(m, &framelen); 486 if (m == NULL) { 487 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 488 ni->ni_macaddr, "a-msdu", "%s", "decap failed"); 489 vap->iv_stats.is_amsdu_tooshort++; 490 return NULL; 491 } 492 if (m->m_pkthdr.len == framelen) 493 break; 494 n = m_split(m, framelen, M_NOWAIT); 495 if (n == NULL) { 496 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 497 ni->ni_macaddr, "a-msdu", 498 "%s", "unable to split encapsulated frames"); 499 vap->iv_stats.is_amsdu_split++; 500 m_freem(m); /* NB: must reclaim */ 501 return NULL; 502 } 503 vap->iv_deliver_data(vap, ni, m); 504 505 /* 506 * Remove frame contents; each intermediate frame 507 * is required to be aligned to a 4-byte boundary. 508 */ 509 m = n; 510 m_adj(m, roundup2(framelen, 4) - framelen); /* padding */ 511 } 512 return m; /* last delivered by caller */ 513 } 514 515 /* 516 * Purge all frames in the A-MPDU re-order queue. 517 */ 518 static void 519 ampdu_rx_purge(struct ieee80211_rx_ampdu *rap) 520 { 521 struct mbuf *m; 522 int i; 523 524 for (i = 0; i < rap->rxa_wnd; i++) { 525 m = rap->rxa_m[i]; 526 if (m != NULL) { 527 rap->rxa_m[i] = NULL; 528 rap->rxa_qbytes -= m->m_pkthdr.len; 529 m_freem(m); 530 if (--rap->rxa_qframes == 0) 531 break; 532 } 533 } 534 KASSERT(rap->rxa_qbytes == 0 && rap->rxa_qframes == 0, 535 ("lost %u data, %u frames on ampdu rx q", 536 rap->rxa_qbytes, rap->rxa_qframes)); 537 } 538 539 /* 540 * Start A-MPDU rx/re-order processing for the specified TID. 541 */ 542 static int 543 ampdu_rx_start(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap, 544 int baparamset, int batimeout, int baseqctl) 545 { 546 int bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ); 547 548 if (rap->rxa_flags & IEEE80211_AGGR_RUNNING) { 549 /* 550 * AMPDU previously setup and not terminated with a DELBA, 551 * flush the reorder q's in case anything remains. 552 */ 553 ampdu_rx_purge(rap); 554 } 555 memset(rap, 0, sizeof(*rap)); 556 rap->rxa_wnd = (bufsiz == 0) ? 557 IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX); 558 rap->rxa_start = MS(baseqctl, IEEE80211_BASEQ_START); 559 rap->rxa_flags |= IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_XCHGPEND; 560 561 return 0; 562 } 563 564 /* 565 * Public function; manually setup the RX ampdu state. 566 */ 567 int 568 ieee80211_ampdu_rx_start_ext(struct ieee80211_node *ni, int tid, int seq, int baw) 569 { 570 struct ieee80211_rx_ampdu *rap; 571 572 /* XXX TODO: sanity check tid, seq, baw */ 573 574 rap = &ni->ni_rx_ampdu[tid]; 575 576 if (rap->rxa_flags & IEEE80211_AGGR_RUNNING) { 577 /* 578 * AMPDU previously setup and not terminated with a DELBA, 579 * flush the reorder q's in case anything remains. 580 */ 581 ampdu_rx_purge(rap); 582 } 583 584 memset(rap, 0, sizeof(*rap)); 585 rap->rxa_wnd = (baw== 0) ? 586 IEEE80211_AGGR_BAWMAX : min(baw, IEEE80211_AGGR_BAWMAX); 587 if (seq == -1) { 588 /* Wait for the first RX frame, use that as BAW */ 589 rap->rxa_start = 0; 590 rap->rxa_flags |= IEEE80211_AGGR_WAITRX; 591 } else { 592 rap->rxa_start = seq; 593 } 594 rap->rxa_flags |= IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_XCHGPEND; 595 596 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, ni, 597 "%s: tid=%d, start=%d, wnd=%d, flags=0x%08x", 598 __func__, 599 tid, 600 seq, 601 rap->rxa_wnd, 602 rap->rxa_flags); 603 604 return 0; 605 } 606 607 /* 608 * Public function; manually stop the RX AMPDU state. 609 */ 610 void 611 ieee80211_ampdu_rx_stop_ext(struct ieee80211_node *ni, int tid) 612 { 613 struct ieee80211_rx_ampdu *rap; 614 615 /* XXX TODO: sanity check tid, seq, baw */ 616 rap = &ni->ni_rx_ampdu[tid]; 617 ampdu_rx_stop(ni, rap); 618 } 619 620 /* 621 * Stop A-MPDU rx processing for the specified TID. 622 */ 623 static void 624 ampdu_rx_stop(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap) 625 { 626 627 ampdu_rx_purge(rap); 628 rap->rxa_flags &= ~(IEEE80211_AGGR_RUNNING 629 | IEEE80211_AGGR_XCHGPEND 630 | IEEE80211_AGGR_WAITRX); 631 } 632 633 /* 634 * Dispatch a frame from the A-MPDU reorder queue. The 635 * frame is fed back into ieee80211_input marked with an 636 * M_AMPDU_MPDU flag so it doesn't come back to us (it also 637 * permits ieee80211_input to optimize re-processing). 638 */ 639 static __inline void 640 ampdu_dispatch(struct ieee80211_node *ni, struct mbuf *m) 641 { 642 m->m_flags |= M_AMPDU_MPDU; /* bypass normal processing */ 643 /* NB: rssi and noise are ignored w/ M_AMPDU_MPDU set */ 644 (void) ieee80211_input(ni, m, 0, 0); 645 } 646 647 static int 648 ampdu_dispatch_slot(struct ieee80211_rx_ampdu *rap, struct ieee80211_node *ni, 649 int i) 650 { 651 struct mbuf *m; 652 653 if (rap->rxa_m[i] == NULL) 654 return (0); 655 656 m = rap->rxa_m[i]; 657 rap->rxa_m[i] = NULL; 658 rap->rxa_qbytes -= m->m_pkthdr.len; 659 rap->rxa_qframes--; 660 661 ampdu_dispatch(ni, m); 662 663 return (1); 664 } 665 666 static void 667 ampdu_rx_moveup(struct ieee80211_rx_ampdu *rap, struct ieee80211_node *ni, 668 int i, int winstart) 669 { 670 struct ieee80211vap *vap = ni->ni_vap; 671 672 if (rap->rxa_qframes != 0) { 673 int n = rap->rxa_qframes, j; 674 675 if (winstart != -1) { 676 /* 677 * NB: in window-sliding mode, loop assumes i > 0 678 * and/or rxa_m[0] is NULL 679 */ 680 KASSERT(rap->rxa_m[0] == NULL, 681 ("%s: BA window slot 0 occupied", __func__)); 682 } 683 for (j = i+1; j < rap->rxa_wnd; j++) { 684 if (rap->rxa_m[j] != NULL) { 685 rap->rxa_m[j-i] = rap->rxa_m[j]; 686 rap->rxa_m[j] = NULL; 687 if (--n == 0) 688 break; 689 } 690 } 691 KASSERT(n == 0, ("%s: lost %d frames, qframes %d off %d " 692 "BA win <%d:%d> winstart %d", 693 __func__, n, rap->rxa_qframes, i, rap->rxa_start, 694 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 695 winstart)); 696 vap->iv_stats.is_ampdu_rx_copy += rap->rxa_qframes; 697 } 698 } 699 700 /* 701 * Dispatch as many frames as possible from the re-order queue. 702 * Frames will always be "at the front"; we process all frames 703 * up to the first empty slot in the window. On completion we 704 * cleanup state if there are still pending frames in the current 705 * BA window. We assume the frame at slot 0 is already handled 706 * by the caller; we always start at slot 1. 707 */ 708 static void 709 ampdu_rx_dispatch(struct ieee80211_rx_ampdu *rap, struct ieee80211_node *ni) 710 { 711 struct ieee80211vap *vap = ni->ni_vap; 712 int i; 713 714 /* flush run of frames */ 715 for (i = 1; i < rap->rxa_wnd; i++) { 716 if (ampdu_dispatch_slot(rap, ni, i) == 0) 717 break; 718 } 719 720 /* 721 * If frames remain, copy the mbuf pointers down so 722 * they correspond to the offsets in the new window. 723 */ 724 ampdu_rx_moveup(rap, ni, i, -1); 725 726 /* 727 * Adjust the start of the BA window to 728 * reflect the frames just dispatched. 729 */ 730 rap->rxa_start = IEEE80211_SEQ_ADD(rap->rxa_start, i); 731 vap->iv_stats.is_ampdu_rx_oor += i; 732 } 733 734 /* 735 * Dispatch all frames in the A-MPDU re-order queue. 736 */ 737 static void 738 ampdu_rx_flush(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap) 739 { 740 struct ieee80211vap *vap = ni->ni_vap; 741 int i, r; 742 743 for (i = 0; i < rap->rxa_wnd; i++) { 744 r = ampdu_dispatch_slot(rap, ni, i); 745 if (r == 0) 746 continue; 747 vap->iv_stats.is_ampdu_rx_oor += r; 748 749 if (rap->rxa_qframes == 0) 750 break; 751 } 752 } 753 754 /* 755 * Dispatch all frames in the A-MPDU re-order queue 756 * preceding the specified sequence number. This logic 757 * handles window moves due to a received MSDU or BAR. 758 */ 759 static void 760 ampdu_rx_flush_upto(struct ieee80211_node *ni, 761 struct ieee80211_rx_ampdu *rap, ieee80211_seq winstart) 762 { 763 struct ieee80211vap *vap = ni->ni_vap; 764 ieee80211_seq seqno; 765 int i, r; 766 767 /* 768 * Flush any complete MSDU's with a sequence number lower 769 * than winstart. Gaps may exist. Note that we may actually 770 * dispatch frames past winstart if a run continues; this is 771 * an optimization that avoids having to do a separate pass 772 * to dispatch frames after moving the BA window start. 773 */ 774 seqno = rap->rxa_start; 775 for (i = 0; i < rap->rxa_wnd; i++) { 776 r = ampdu_dispatch_slot(rap, ni, i); 777 if (r == 0) { 778 if (!IEEE80211_SEQ_BA_BEFORE(seqno, winstart)) 779 break; 780 } 781 vap->iv_stats.is_ampdu_rx_oor += r; 782 seqno = IEEE80211_SEQ_INC(seqno); 783 } 784 /* 785 * If frames remain, copy the mbuf pointers down so 786 * they correspond to the offsets in the new window. 787 */ 788 ampdu_rx_moveup(rap, ni, i, winstart); 789 790 /* 791 * Move the start of the BA window; we use the 792 * sequence number of the last MSDU that was 793 * passed up the stack+1 or winstart if stopped on 794 * a gap in the reorder buffer. 795 */ 796 rap->rxa_start = seqno; 797 } 798 799 /* 800 * Process a received QoS data frame for an HT station. Handle 801 * A-MPDU reordering: if this frame is received out of order 802 * and falls within the BA window hold onto it. Otherwise if 803 * this frame completes a run, flush any pending frames. We 804 * return 1 if the frame is consumed. A 0 is returned if 805 * the frame should be processed normally by the caller. 806 */ 807 int 808 ieee80211_ampdu_reorder(struct ieee80211_node *ni, struct mbuf *m) 809 { 810 #define PROCESS 0 /* caller should process frame */ 811 #define CONSUMED 1 /* frame consumed, caller does nothing */ 812 struct ieee80211vap *vap = ni->ni_vap; 813 struct ieee80211_qosframe *wh; 814 struct ieee80211_rx_ampdu *rap; 815 ieee80211_seq rxseq; 816 uint8_t tid; 817 int off; 818 819 KASSERT((m->m_flags & (M_AMPDU | M_AMPDU_MPDU)) == M_AMPDU, 820 ("!a-mpdu or already re-ordered, flags 0x%x", m->m_flags)); 821 KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT sta")); 822 823 /* NB: m_len known to be sufficient */ 824 wh = mtod(m, struct ieee80211_qosframe *); 825 if (wh->i_fc[0] != IEEE80211_FC0_QOSDATA) { 826 /* 827 * Not QoS data, shouldn't get here but just 828 * return it to the caller for processing. 829 */ 830 return PROCESS; 831 } 832 833 /* 834 * 802.11-2012 9.3.2.10 - Duplicate detection and recovery. 835 * 836 * Multicast QoS data frames are checked against a different 837 * counter, not the per-TID counter. 838 */ 839 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 840 return PROCESS; 841 842 if (IEEE80211_IS_DSTODS(wh)) 843 tid = ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0]; 844 else 845 tid = wh->i_qos[0]; 846 tid &= IEEE80211_QOS_TID; 847 rap = &ni->ni_rx_ampdu[tid]; 848 if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) { 849 /* 850 * No ADDBA request yet, don't touch. 851 */ 852 return PROCESS; 853 } 854 rxseq = le16toh(*(uint16_t *)wh->i_seq); 855 if ((rxseq & IEEE80211_SEQ_FRAG_MASK) != 0) { 856 /* 857 * Fragments are not allowed; toss. 858 */ 859 IEEE80211_DISCARD_MAC(vap, 860 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr, 861 "A-MPDU", "fragment, rxseq 0x%x tid %u%s", rxseq, tid, 862 wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : ""); 863 vap->iv_stats.is_ampdu_rx_drop++; 864 IEEE80211_NODE_STAT(ni, rx_drop); 865 m_freem(m); 866 return CONSUMED; 867 } 868 rxseq >>= IEEE80211_SEQ_SEQ_SHIFT; 869 rap->rxa_nframes++; 870 871 /* 872 * Handle waiting for the first frame to define the BAW. 873 * Some firmware doesn't provide the RX of the starting point 874 * of the BAW and we have to cope. 875 */ 876 if (rap->rxa_flags & IEEE80211_AGGR_WAITRX) { 877 rap->rxa_flags &= ~IEEE80211_AGGR_WAITRX; 878 rap->rxa_start = rxseq; 879 } 880 again: 881 if (rxseq == rap->rxa_start) { 882 /* 883 * First frame in window. 884 */ 885 if (rap->rxa_qframes != 0) { 886 /* 887 * Dispatch as many packets as we can. 888 */ 889 KASSERT(rap->rxa_m[0] == NULL, ("unexpected dup")); 890 ampdu_dispatch(ni, m); 891 ampdu_rx_dispatch(rap, ni); 892 return CONSUMED; 893 } else { 894 /* 895 * In order; advance window and notify 896 * caller to dispatch directly. 897 */ 898 rap->rxa_start = IEEE80211_SEQ_INC(rxseq); 899 return PROCESS; 900 } 901 } 902 /* 903 * Frame is out of order; store if in the BA window. 904 */ 905 /* calculate offset in BA window */ 906 off = IEEE80211_SEQ_SUB(rxseq, rap->rxa_start); 907 if (off < rap->rxa_wnd) { 908 /* 909 * Common case (hopefully): in the BA window. 910 * Sec 9.10.7.6.2 a) (p.137) 911 */ 912 913 /* 914 * Check for frames sitting too long in the reorder queue. 915 * This should only ever happen if frames are not delivered 916 * without the sender otherwise notifying us (e.g. with a 917 * BAR to move the window). Typically this happens because 918 * of vendor bugs that cause the sequence number to jump. 919 * When this happens we get a gap in the reorder queue that 920 * leaves frame sitting on the queue until they get pushed 921 * out due to window moves. When the vendor does not send 922 * BAR this move only happens due to explicit packet sends 923 * 924 * NB: we only track the time of the oldest frame in the 925 * reorder q; this means that if we flush we might push 926 * frames that still "new"; if this happens then subsequent 927 * frames will result in BA window moves which cost something 928 * but is still better than a big throughput dip. 929 */ 930 if (rap->rxa_qframes != 0) { 931 /* XXX honor batimeout? */ 932 if (ticks - rap->rxa_age > ieee80211_ampdu_age) { 933 /* 934 * Too long since we received the first 935 * frame; flush the reorder buffer. 936 */ 937 if (rap->rxa_qframes != 0) { 938 vap->iv_stats.is_ampdu_rx_age += 939 rap->rxa_qframes; 940 ampdu_rx_flush(ni, rap); 941 } 942 rap->rxa_start = IEEE80211_SEQ_INC(rxseq); 943 return PROCESS; 944 } 945 } else { 946 /* 947 * First frame, start aging timer. 948 */ 949 rap->rxa_age = ticks; 950 } 951 952 /* save packet */ 953 if (rap->rxa_m[off] == NULL) { 954 rap->rxa_m[off] = m; 955 rap->rxa_qframes++; 956 rap->rxa_qbytes += m->m_pkthdr.len; 957 vap->iv_stats.is_ampdu_rx_reorder++; 958 } else { 959 IEEE80211_DISCARD_MAC(vap, 960 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, 961 ni->ni_macaddr, "a-mpdu duplicate", 962 "seqno %u tid %u BA win <%u:%u>", 963 rxseq, tid, rap->rxa_start, 964 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1)); 965 vap->iv_stats.is_rx_dup++; 966 IEEE80211_NODE_STAT(ni, rx_dup); 967 m_freem(m); 968 } 969 return CONSUMED; 970 } 971 if (off < IEEE80211_SEQ_BA_RANGE) { 972 /* 973 * Outside the BA window, but within range; 974 * flush the reorder q and move the window. 975 * Sec 9.10.7.6.2 b) (p.138) 976 */ 977 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni, 978 "move BA win <%u:%u> (%u frames) rxseq %u tid %u", 979 rap->rxa_start, 980 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 981 rap->rxa_qframes, rxseq, tid); 982 vap->iv_stats.is_ampdu_rx_move++; 983 984 /* 985 * The spec says to flush frames up to but not including: 986 * WinStart_B = rxseq - rap->rxa_wnd + 1 987 * Then insert the frame or notify the caller to process 988 * it immediately. We can safely do this by just starting 989 * over again because we know the frame will now be within 990 * the BA window. 991 */ 992 /* NB: rxa_wnd known to be >0 */ 993 ampdu_rx_flush_upto(ni, rap, 994 IEEE80211_SEQ_SUB(rxseq, rap->rxa_wnd-1)); 995 goto again; 996 } else { 997 /* 998 * Outside the BA window and out of range; toss. 999 * Sec 9.10.7.6.2 c) (p.138) 1000 */ 1001 IEEE80211_DISCARD_MAC(vap, 1002 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr, 1003 "MPDU", "BA win <%u:%u> (%u frames) rxseq %u tid %u%s", 1004 rap->rxa_start, 1005 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 1006 rap->rxa_qframes, rxseq, tid, 1007 wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : ""); 1008 vap->iv_stats.is_ampdu_rx_drop++; 1009 IEEE80211_NODE_STAT(ni, rx_drop); 1010 m_freem(m); 1011 return CONSUMED; 1012 } 1013 #undef CONSUMED 1014 #undef PROCESS 1015 } 1016 1017 /* 1018 * Process a BAR ctl frame. Dispatch all frames up to 1019 * the sequence number of the frame. If this frame is 1020 * out of range it's discarded. 1021 */ 1022 void 1023 ieee80211_recv_bar(struct ieee80211_node *ni, struct mbuf *m0) 1024 { 1025 struct ieee80211vap *vap = ni->ni_vap; 1026 struct ieee80211_frame_bar *wh; 1027 struct ieee80211_rx_ampdu *rap; 1028 ieee80211_seq rxseq; 1029 int tid, off; 1030 1031 if (!ieee80211_recv_bar_ena) { 1032 #if 0 1033 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_11N, 1034 ni->ni_macaddr, "BAR", "%s", "processing disabled"); 1035 #endif 1036 vap->iv_stats.is_ampdu_bar_bad++; 1037 return; 1038 } 1039 wh = mtod(m0, struct ieee80211_frame_bar *); 1040 /* XXX check basic BAR */ 1041 tid = MS(le16toh(wh->i_ctl), IEEE80211_BAR_TID); 1042 rap = &ni->ni_rx_ampdu[tid]; 1043 if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) { 1044 /* 1045 * No ADDBA request yet, don't touch. 1046 */ 1047 IEEE80211_DISCARD_MAC(vap, 1048 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, 1049 ni->ni_macaddr, "BAR", "no BA stream, tid %u", tid); 1050 vap->iv_stats.is_ampdu_bar_bad++; 1051 return; 1052 } 1053 vap->iv_stats.is_ampdu_bar_rx++; 1054 rxseq = le16toh(wh->i_seq) >> IEEE80211_SEQ_SEQ_SHIFT; 1055 if (rxseq == rap->rxa_start) 1056 return; 1057 /* calculate offset in BA window */ 1058 off = IEEE80211_SEQ_SUB(rxseq, rap->rxa_start); 1059 if (off < IEEE80211_SEQ_BA_RANGE) { 1060 /* 1061 * Flush the reorder q up to rxseq and move the window. 1062 * Sec 9.10.7.6.3 a) (p.138) 1063 */ 1064 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni, 1065 "BAR moves BA win <%u:%u> (%u frames) rxseq %u tid %u", 1066 rap->rxa_start, 1067 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 1068 rap->rxa_qframes, rxseq, tid); 1069 vap->iv_stats.is_ampdu_bar_move++; 1070 1071 ampdu_rx_flush_upto(ni, rap, rxseq); 1072 if (off >= rap->rxa_wnd) { 1073 /* 1074 * BAR specifies a window start to the right of BA 1075 * window; we must move it explicitly since 1076 * ampdu_rx_flush_upto will not. 1077 */ 1078 rap->rxa_start = rxseq; 1079 } 1080 } else { 1081 /* 1082 * Out of range; toss. 1083 * Sec 9.10.7.6.3 b) (p.138) 1084 */ 1085 IEEE80211_DISCARD_MAC(vap, 1086 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr, 1087 "BAR", "BA win <%u:%u> (%u frames) rxseq %u tid %u%s", 1088 rap->rxa_start, 1089 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 1090 rap->rxa_qframes, rxseq, tid, 1091 wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : ""); 1092 vap->iv_stats.is_ampdu_bar_oow++; 1093 IEEE80211_NODE_STAT(ni, rx_drop); 1094 } 1095 } 1096 1097 /* 1098 * Setup HT-specific state in a node. Called only 1099 * when HT use is negotiated so we don't do extra 1100 * work for temporary and/or legacy sta's. 1101 */ 1102 void 1103 ieee80211_ht_node_init(struct ieee80211_node *ni) 1104 { 1105 struct ieee80211_tx_ampdu *tap; 1106 int tid; 1107 1108 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 1109 ni, 1110 "%s: called (%p)", 1111 __func__, 1112 ni); 1113 1114 if (ni->ni_flags & IEEE80211_NODE_HT) { 1115 /* 1116 * Clean AMPDU state on re-associate. This handles the case 1117 * where a station leaves w/o notifying us and then returns 1118 * before node is reaped for inactivity. 1119 */ 1120 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 1121 ni, 1122 "%s: calling cleanup (%p)", 1123 __func__, ni); 1124 ieee80211_ht_node_cleanup(ni); 1125 } 1126 for (tid = 0; tid < WME_NUM_TID; tid++) { 1127 tap = &ni->ni_tx_ampdu[tid]; 1128 tap->txa_tid = tid; 1129 tap->txa_ni = ni; 1130 ieee80211_txampdu_init_pps(tap); 1131 /* NB: further initialization deferred */ 1132 } 1133 ni->ni_flags |= IEEE80211_NODE_HT | IEEE80211_NODE_AMPDU; 1134 } 1135 1136 /* 1137 * Cleanup HT-specific state in a node. Called only 1138 * when HT use has been marked. 1139 */ 1140 void 1141 ieee80211_ht_node_cleanup(struct ieee80211_node *ni) 1142 { 1143 struct ieee80211com *ic = ni->ni_ic; 1144 int i; 1145 1146 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 1147 ni, 1148 "%s: called (%p)", 1149 __func__, ni); 1150 1151 KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT node")); 1152 1153 /* XXX optimize this */ 1154 for (i = 0; i < WME_NUM_TID; i++) { 1155 struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[i]; 1156 if (tap->txa_flags & IEEE80211_AGGR_SETUP) 1157 ampdu_tx_stop(tap); 1158 } 1159 for (i = 0; i < WME_NUM_TID; i++) 1160 ic->ic_ampdu_rx_stop(ni, &ni->ni_rx_ampdu[i]); 1161 1162 ni->ni_htcap = 0; 1163 ni->ni_flags &= ~IEEE80211_NODE_HT_ALL; 1164 } 1165 1166 /* 1167 * Age out HT resources for a station. 1168 */ 1169 void 1170 ieee80211_ht_node_age(struct ieee80211_node *ni) 1171 { 1172 struct ieee80211vap *vap = ni->ni_vap; 1173 uint8_t tid; 1174 1175 KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT sta")); 1176 1177 for (tid = 0; tid < WME_NUM_TID; tid++) { 1178 struct ieee80211_rx_ampdu *rap; 1179 1180 rap = &ni->ni_rx_ampdu[tid]; 1181 if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) 1182 continue; 1183 if (rap->rxa_qframes == 0) 1184 continue; 1185 /* 1186 * Check for frames sitting too long in the reorder queue. 1187 * See above for more details on what's happening here. 1188 */ 1189 /* XXX honor batimeout? */ 1190 if (ticks - rap->rxa_age > ieee80211_ampdu_age) { 1191 /* 1192 * Too long since we received the first 1193 * frame; flush the reorder buffer. 1194 */ 1195 vap->iv_stats.is_ampdu_rx_age += rap->rxa_qframes; 1196 ampdu_rx_flush(ni, rap); 1197 } 1198 } 1199 } 1200 1201 static struct ieee80211_channel * 1202 findhtchan(struct ieee80211com *ic, struct ieee80211_channel *c, int htflags) 1203 { 1204 return ieee80211_find_channel(ic, c->ic_freq, 1205 (c->ic_flags &~ IEEE80211_CHAN_HT) | htflags); 1206 } 1207 1208 /* 1209 * Adjust a channel to be HT/non-HT according to the vap's configuration. 1210 */ 1211 struct ieee80211_channel * 1212 ieee80211_ht_adjust_channel(struct ieee80211com *ic, 1213 struct ieee80211_channel *chan, int flags) 1214 { 1215 struct ieee80211_channel *c; 1216 1217 if (flags & IEEE80211_FHT_HT) { 1218 /* promote to HT if possible */ 1219 if (flags & IEEE80211_FHT_USEHT40) { 1220 if (!IEEE80211_IS_CHAN_HT40(chan)) { 1221 /* NB: arbitrarily pick ht40+ over ht40- */ 1222 c = findhtchan(ic, chan, IEEE80211_CHAN_HT40U); 1223 if (c == NULL) 1224 c = findhtchan(ic, chan, 1225 IEEE80211_CHAN_HT40D); 1226 if (c == NULL) 1227 c = findhtchan(ic, chan, 1228 IEEE80211_CHAN_HT20); 1229 if (c != NULL) 1230 chan = c; 1231 } 1232 } else if (!IEEE80211_IS_CHAN_HT20(chan)) { 1233 c = findhtchan(ic, chan, IEEE80211_CHAN_HT20); 1234 if (c != NULL) 1235 chan = c; 1236 } 1237 } else if (IEEE80211_IS_CHAN_HT(chan)) { 1238 /* demote to legacy, HT use is disabled */ 1239 c = ieee80211_find_channel(ic, chan->ic_freq, 1240 chan->ic_flags &~ IEEE80211_CHAN_HT); 1241 if (c != NULL) 1242 chan = c; 1243 } 1244 return chan; 1245 } 1246 1247 /* 1248 * Setup HT-specific state for a legacy WDS peer. 1249 */ 1250 void 1251 ieee80211_ht_wds_init(struct ieee80211_node *ni) 1252 { 1253 struct ieee80211vap *vap = ni->ni_vap; 1254 struct ieee80211_tx_ampdu *tap; 1255 int tid; 1256 1257 KASSERT(vap->iv_flags_ht & IEEE80211_FHT_HT, ("no HT requested")); 1258 1259 /* XXX check scan cache in case peer has an ap and we have info */ 1260 /* 1261 * If setup with a legacy channel; locate an HT channel. 1262 * Otherwise if the inherited channel (from a companion 1263 * AP) is suitable use it so we use the same location 1264 * for the extension channel). 1265 */ 1266 ni->ni_chan = ieee80211_ht_adjust_channel(ni->ni_ic, 1267 ni->ni_chan, ieee80211_htchanflags(ni->ni_chan)); 1268 1269 ni->ni_htcap = 0; 1270 if (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20) 1271 ni->ni_htcap |= IEEE80211_HTCAP_SHORTGI20; 1272 if (IEEE80211_IS_CHAN_HT40(ni->ni_chan)) { 1273 ni->ni_htcap |= IEEE80211_HTCAP_CHWIDTH40; 1274 ni->ni_chw = 40; 1275 if (IEEE80211_IS_CHAN_HT40U(ni->ni_chan)) 1276 ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_ABOVE; 1277 else if (IEEE80211_IS_CHAN_HT40D(ni->ni_chan)) 1278 ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_BELOW; 1279 if (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40) 1280 ni->ni_htcap |= IEEE80211_HTCAP_SHORTGI40; 1281 } else { 1282 ni->ni_chw = 20; 1283 ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_NONE; 1284 } 1285 ni->ni_htctlchan = ni->ni_chan->ic_ieee; 1286 if (vap->iv_flags_ht & IEEE80211_FHT_RIFS) 1287 ni->ni_flags |= IEEE80211_NODE_RIFS; 1288 /* XXX does it make sense to enable SMPS? */ 1289 1290 ni->ni_htopmode = 0; /* XXX need protection state */ 1291 ni->ni_htstbc = 0; /* XXX need info */ 1292 1293 for (tid = 0; tid < WME_NUM_TID; tid++) { 1294 tap = &ni->ni_tx_ampdu[tid]; 1295 tap->txa_tid = tid; 1296 ieee80211_txampdu_init_pps(tap); 1297 } 1298 /* NB: AMPDU tx/rx governed by IEEE80211_FHT_AMPDU_{TX,RX} */ 1299 ni->ni_flags |= IEEE80211_NODE_HT | IEEE80211_NODE_AMPDU; 1300 } 1301 1302 /* 1303 * Notify hostap vaps of a change in the HTINFO ie. 1304 */ 1305 static void 1306 htinfo_notify(struct ieee80211com *ic) 1307 { 1308 struct ieee80211vap *vap; 1309 int first = 1; 1310 1311 IEEE80211_LOCK_ASSERT(ic); 1312 1313 TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1314 if (vap->iv_opmode != IEEE80211_M_HOSTAP) 1315 continue; 1316 if (vap->iv_state != IEEE80211_S_RUN || 1317 !IEEE80211_IS_CHAN_HT(vap->iv_bss->ni_chan)) 1318 continue; 1319 if (first) { 1320 IEEE80211_NOTE(vap, 1321 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, 1322 vap->iv_bss, 1323 "HT bss occupancy change: %d sta, %d ht, " 1324 "%d ht40%s, HT protmode now 0x%x" 1325 , ic->ic_sta_assoc 1326 , ic->ic_ht_sta_assoc 1327 , ic->ic_ht40_sta_assoc 1328 , (ic->ic_flags_ht & IEEE80211_FHT_NONHT_PR) ? 1329 ", non-HT sta present" : "" 1330 , ic->ic_curhtprotmode); 1331 first = 0; 1332 } 1333 ieee80211_beacon_notify(vap, IEEE80211_BEACON_HTINFO); 1334 } 1335 } 1336 1337 /* 1338 * Calculate HT protection mode from current 1339 * state and handle updates. 1340 */ 1341 static void 1342 htinfo_update(struct ieee80211com *ic) 1343 { 1344 uint8_t protmode; 1345 1346 if (ic->ic_sta_assoc != ic->ic_ht_sta_assoc) { 1347 protmode = IEEE80211_HTINFO_OPMODE_MIXED 1348 | IEEE80211_HTINFO_NONHT_PRESENT; 1349 } else if (ic->ic_flags_ht & IEEE80211_FHT_NONHT_PR) { 1350 protmode = IEEE80211_HTINFO_OPMODE_PROTOPT 1351 | IEEE80211_HTINFO_NONHT_PRESENT; 1352 } else if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && 1353 IEEE80211_IS_CHAN_HT40(ic->ic_bsschan) && 1354 ic->ic_sta_assoc != ic->ic_ht40_sta_assoc) { 1355 protmode = IEEE80211_HTINFO_OPMODE_HT20PR; 1356 } else { 1357 protmode = IEEE80211_HTINFO_OPMODE_PURE; 1358 } 1359 if (protmode != ic->ic_curhtprotmode) { 1360 ic->ic_curhtprotmode = protmode; 1361 htinfo_notify(ic); 1362 } 1363 } 1364 1365 /* 1366 * Handle an HT station joining a BSS. 1367 */ 1368 void 1369 ieee80211_ht_node_join(struct ieee80211_node *ni) 1370 { 1371 struct ieee80211com *ic = ni->ni_ic; 1372 1373 IEEE80211_LOCK_ASSERT(ic); 1374 1375 if (ni->ni_flags & IEEE80211_NODE_HT) { 1376 ic->ic_ht_sta_assoc++; 1377 if (ni->ni_chw == 40) 1378 ic->ic_ht40_sta_assoc++; 1379 } 1380 htinfo_update(ic); 1381 } 1382 1383 /* 1384 * Handle an HT station leaving a BSS. 1385 */ 1386 void 1387 ieee80211_ht_node_leave(struct ieee80211_node *ni) 1388 { 1389 struct ieee80211com *ic = ni->ni_ic; 1390 1391 IEEE80211_LOCK_ASSERT(ic); 1392 1393 if (ni->ni_flags & IEEE80211_NODE_HT) { 1394 ic->ic_ht_sta_assoc--; 1395 if (ni->ni_chw == 40) 1396 ic->ic_ht40_sta_assoc--; 1397 } 1398 htinfo_update(ic); 1399 } 1400 1401 /* 1402 * Public version of htinfo_update; used for processing 1403 * beacon frames from overlapping bss. 1404 * 1405 * Caller can specify either IEEE80211_HTINFO_OPMODE_MIXED 1406 * (on receipt of a beacon that advertises MIXED) or 1407 * IEEE80211_HTINFO_OPMODE_PROTOPT (on receipt of a beacon 1408 * from an overlapping legacy bss). We treat MIXED with 1409 * a higher precedence than PROTOPT (i.e. we will not change 1410 * change PROTOPT -> MIXED; only MIXED -> PROTOPT). This 1411 * corresponds to how we handle things in htinfo_update. 1412 */ 1413 void 1414 ieee80211_htprot_update(struct ieee80211com *ic, int protmode) 1415 { 1416 #define OPMODE(x) SM(x, IEEE80211_HTINFO_OPMODE) 1417 IEEE80211_LOCK(ic); 1418 1419 /* track non-HT station presence */ 1420 KASSERT(protmode & IEEE80211_HTINFO_NONHT_PRESENT, 1421 ("protmode 0x%x", protmode)); 1422 ic->ic_flags_ht |= IEEE80211_FHT_NONHT_PR; 1423 ic->ic_lastnonht = ticks; 1424 1425 if (protmode != ic->ic_curhtprotmode && 1426 (OPMODE(ic->ic_curhtprotmode) != IEEE80211_HTINFO_OPMODE_MIXED || 1427 OPMODE(protmode) == IEEE80211_HTINFO_OPMODE_PROTOPT)) { 1428 /* push beacon update */ 1429 ic->ic_curhtprotmode = protmode; 1430 htinfo_notify(ic); 1431 } 1432 IEEE80211_UNLOCK(ic); 1433 #undef OPMODE 1434 } 1435 1436 /* 1437 * Time out presence of an overlapping bss with non-HT 1438 * stations. When operating in hostap mode we listen for 1439 * beacons from other stations and if we identify a non-HT 1440 * station is present we update the opmode field of the 1441 * HTINFO ie. To identify when all non-HT stations are 1442 * gone we time out this condition. 1443 */ 1444 void 1445 ieee80211_ht_timeout(struct ieee80211com *ic) 1446 { 1447 IEEE80211_LOCK_ASSERT(ic); 1448 1449 if ((ic->ic_flags_ht & IEEE80211_FHT_NONHT_PR) && 1450 ieee80211_time_after(ticks, ic->ic_lastnonht + IEEE80211_NONHT_PRESENT_AGE)) { 1451 #if 0 1452 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni, 1453 "%s", "time out non-HT STA present on channel"); 1454 #endif 1455 ic->ic_flags_ht &= ~IEEE80211_FHT_NONHT_PR; 1456 htinfo_update(ic); 1457 } 1458 } 1459 1460 /* 1461 * Process an 802.11n HT capabilities ie. 1462 */ 1463 void 1464 ieee80211_parse_htcap(struct ieee80211_node *ni, const uint8_t *ie) 1465 { 1466 if (ie[0] == IEEE80211_ELEMID_VENDOR) { 1467 /* 1468 * Station used Vendor OUI ie to associate; 1469 * mark the node so when we respond we'll use 1470 * the Vendor OUI's and not the standard ie's. 1471 */ 1472 ni->ni_flags |= IEEE80211_NODE_HTCOMPAT; 1473 ie += 4; 1474 } else 1475 ni->ni_flags &= ~IEEE80211_NODE_HTCOMPAT; 1476 1477 ni->ni_htcap = le16dec(ie + 1478 __offsetof(struct ieee80211_ie_htcap, hc_cap)); 1479 ni->ni_htparam = ie[__offsetof(struct ieee80211_ie_htcap, hc_param)]; 1480 } 1481 1482 static void 1483 htinfo_parse(struct ieee80211_node *ni, 1484 const struct ieee80211_ie_htinfo *htinfo) 1485 { 1486 uint16_t w; 1487 1488 ni->ni_htctlchan = htinfo->hi_ctrlchannel; 1489 ni->ni_ht2ndchan = SM(htinfo->hi_byte1, IEEE80211_HTINFO_2NDCHAN); 1490 w = le16dec(&htinfo->hi_byte2); 1491 ni->ni_htopmode = SM(w, IEEE80211_HTINFO_OPMODE); 1492 w = le16dec(&htinfo->hi_byte45); 1493 ni->ni_htstbc = SM(w, IEEE80211_HTINFO_BASIC_STBCMCS); 1494 } 1495 1496 /* 1497 * Parse an 802.11n HT info ie and save useful information 1498 * to the node state. Note this does not effect any state 1499 * changes such as for channel width change. 1500 */ 1501 void 1502 ieee80211_parse_htinfo(struct ieee80211_node *ni, const uint8_t *ie) 1503 { 1504 if (ie[0] == IEEE80211_ELEMID_VENDOR) 1505 ie += 4; 1506 htinfo_parse(ni, (const struct ieee80211_ie_htinfo *) ie); 1507 } 1508 1509 /* 1510 * Handle 11n/11ac channel switch. 1511 * 1512 * Use the received HT/VHT ie's to identify the right channel to use. 1513 * If we cannot locate it in the channel table then fallback to 1514 * legacy operation. 1515 * 1516 * Note that we use this information to identify the node's 1517 * channel only; the caller is responsible for insuring any 1518 * required channel change is done (e.g. in sta mode when 1519 * parsing the contents of a beacon frame). 1520 */ 1521 static int 1522 htinfo_update_chw(struct ieee80211_node *ni, int htflags, int vhtflags) 1523 { 1524 struct ieee80211com *ic = ni->ni_ic; 1525 struct ieee80211_channel *c; 1526 int chanflags; 1527 int ret = 0; 1528 1529 /* 1530 * First step - do HT/VHT only channel lookup based on operating mode 1531 * flags. This involves masking out the VHT flags as well. 1532 * Otherwise we end up doing the full channel walk each time 1533 * we trigger this, which is expensive. 1534 */ 1535 chanflags = (ni->ni_chan->ic_flags &~ 1536 (IEEE80211_CHAN_HT | IEEE80211_CHAN_VHT)) | htflags | vhtflags; 1537 1538 if (chanflags == ni->ni_chan->ic_flags) 1539 goto done; 1540 1541 /* 1542 * If HT /or/ VHT flags have changed then check both. 1543 * We need to start by picking a HT channel anyway. 1544 */ 1545 1546 c = NULL; 1547 chanflags = (ni->ni_chan->ic_flags &~ 1548 (IEEE80211_CHAN_HT | IEEE80211_CHAN_VHT)) | htflags; 1549 /* XXX not right for ht40- */ 1550 c = ieee80211_find_channel(ic, ni->ni_chan->ic_freq, chanflags); 1551 if (c == NULL && (htflags & IEEE80211_CHAN_HT40)) { 1552 /* 1553 * No HT40 channel entry in our table; fall back 1554 * to HT20 operation. This should not happen. 1555 */ 1556 c = findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT20); 1557 #if 0 1558 IEEE80211_NOTE(ni->ni_vap, 1559 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni, 1560 "no HT40 channel (freq %u), falling back to HT20", 1561 ni->ni_chan->ic_freq); 1562 #endif 1563 /* XXX stat */ 1564 } 1565 1566 /* Nothing found - leave it alone; move onto VHT */ 1567 if (c == NULL) 1568 c = ni->ni_chan; 1569 1570 /* 1571 * If it's non-HT, then bail out now. 1572 */ 1573 if (! IEEE80211_IS_CHAN_HT(c)) { 1574 IEEE80211_NOTE(ni->ni_vap, 1575 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni, 1576 "not HT; skipping VHT check (%u/0x%x)", 1577 c->ic_freq, c->ic_flags); 1578 goto done; 1579 } 1580 1581 /* 1582 * Next step - look at the current VHT flags and determine 1583 * if we need to upgrade. Mask out the VHT and HT flags since 1584 * the vhtflags field will already have the correct HT 1585 * flags to use. 1586 */ 1587 if (IEEE80211_CONF_VHT(ic) && ni->ni_vhtcap != 0 && vhtflags != 0) { 1588 chanflags = (c->ic_flags 1589 &~ (IEEE80211_CHAN_HT | IEEE80211_CHAN_VHT)) 1590 | vhtflags; 1591 IEEE80211_NOTE(ni->ni_vap, 1592 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, 1593 ni, 1594 "%s: VHT; chanwidth=0x%02x; vhtflags=0x%08x", 1595 __func__, ni->ni_vht_chanwidth, vhtflags); 1596 1597 IEEE80211_NOTE(ni->ni_vap, 1598 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, 1599 ni, 1600 "%s: VHT; trying lookup for %d/0x%08x", 1601 __func__, c->ic_freq, chanflags); 1602 c = ieee80211_find_channel(ic, c->ic_freq, chanflags); 1603 } 1604 1605 /* Finally, if it's changed */ 1606 if (c != NULL && c != ni->ni_chan) { 1607 IEEE80211_NOTE(ni->ni_vap, 1608 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni, 1609 "switch station to %s%d channel %u/0x%x", 1610 IEEE80211_IS_CHAN_VHT(c) ? "VHT" : "HT", 1611 IEEE80211_IS_CHAN_VHT80(c) ? 80 : 1612 (IEEE80211_IS_CHAN_HT40(c) ? 40 : 20), 1613 c->ic_freq, c->ic_flags); 1614 ni->ni_chan = c; 1615 ret = 1; 1616 } 1617 /* NB: caller responsible for forcing any channel change */ 1618 1619 done: 1620 /* update node's (11n) tx channel width */ 1621 ni->ni_chw = IEEE80211_IS_CHAN_HT40(ni->ni_chan)? 40 : 20; 1622 return (ret); 1623 } 1624 1625 /* 1626 * Update 11n MIMO PS state according to received htcap. 1627 */ 1628 static __inline int 1629 htcap_update_mimo_ps(struct ieee80211_node *ni) 1630 { 1631 uint16_t oflags = ni->ni_flags; 1632 1633 switch (ni->ni_htcap & IEEE80211_HTCAP_SMPS) { 1634 case IEEE80211_HTCAP_SMPS_DYNAMIC: 1635 ni->ni_flags |= IEEE80211_NODE_MIMO_PS; 1636 ni->ni_flags |= IEEE80211_NODE_MIMO_RTS; 1637 break; 1638 case IEEE80211_HTCAP_SMPS_ENA: 1639 ni->ni_flags |= IEEE80211_NODE_MIMO_PS; 1640 ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS; 1641 break; 1642 case IEEE80211_HTCAP_SMPS_OFF: 1643 default: /* disable on rx of reserved value */ 1644 ni->ni_flags &= ~IEEE80211_NODE_MIMO_PS; 1645 ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS; 1646 break; 1647 } 1648 return (oflags ^ ni->ni_flags); 1649 } 1650 1651 /* 1652 * Update short GI state according to received htcap 1653 * and local settings. 1654 */ 1655 static __inline void 1656 htcap_update_shortgi(struct ieee80211_node *ni) 1657 { 1658 struct ieee80211vap *vap = ni->ni_vap; 1659 1660 ni->ni_flags &= ~(IEEE80211_NODE_SGI20|IEEE80211_NODE_SGI40); 1661 if ((ni->ni_htcap & IEEE80211_HTCAP_SHORTGI20) && 1662 (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20)) 1663 ni->ni_flags |= IEEE80211_NODE_SGI20; 1664 if ((ni->ni_htcap & IEEE80211_HTCAP_SHORTGI40) && 1665 (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40)) 1666 ni->ni_flags |= IEEE80211_NODE_SGI40; 1667 } 1668 1669 /* 1670 * Update LDPC state according to received htcap 1671 * and local settings. 1672 */ 1673 static __inline void 1674 htcap_update_ldpc(struct ieee80211_node *ni) 1675 { 1676 struct ieee80211vap *vap = ni->ni_vap; 1677 1678 if ((ni->ni_htcap & IEEE80211_HTCAP_LDPC) && 1679 (vap->iv_flags_ht & IEEE80211_FHT_LDPC_TX)) 1680 ni->ni_flags |= IEEE80211_NODE_LDPC; 1681 } 1682 1683 /* 1684 * Parse and update HT-related state extracted from 1685 * the HT cap and info ie's. 1686 * 1687 * This is called from the STA management path and 1688 * the ieee80211_node_join() path. It will take into 1689 * account the IEs discovered during scanning and 1690 * adjust things accordingly. 1691 */ 1692 void 1693 ieee80211_ht_updateparams(struct ieee80211_node *ni, 1694 const uint8_t *htcapie, const uint8_t *htinfoie) 1695 { 1696 struct ieee80211vap *vap = ni->ni_vap; 1697 const struct ieee80211_ie_htinfo *htinfo; 1698 1699 ieee80211_parse_htcap(ni, htcapie); 1700 if (vap->iv_htcaps & IEEE80211_HTCAP_SMPS) 1701 htcap_update_mimo_ps(ni); 1702 htcap_update_shortgi(ni); 1703 htcap_update_ldpc(ni); 1704 1705 if (htinfoie[0] == IEEE80211_ELEMID_VENDOR) 1706 htinfoie += 4; 1707 htinfo = (const struct ieee80211_ie_htinfo *) htinfoie; 1708 htinfo_parse(ni, htinfo); 1709 1710 /* 1711 * Defer the node channel change; we need to now 1712 * update VHT parameters before we do it. 1713 */ 1714 1715 if ((htinfo->hi_byte1 & IEEE80211_HTINFO_RIFSMODE_PERM) && 1716 (vap->iv_flags_ht & IEEE80211_FHT_RIFS)) 1717 ni->ni_flags |= IEEE80211_NODE_RIFS; 1718 else 1719 ni->ni_flags &= ~IEEE80211_NODE_RIFS; 1720 } 1721 1722 static uint32_t 1723 ieee80211_vht_get_vhtflags(struct ieee80211_node *ni, uint32_t htflags) 1724 { 1725 struct ieee80211vap *vap = ni->ni_vap; 1726 uint32_t vhtflags = 0; 1727 1728 vhtflags = 0; 1729 if (ni->ni_flags & IEEE80211_NODE_VHT && vap->iv_flags_vht & IEEE80211_FVHT_VHT) { 1730 if ((ni->ni_vht_chanwidth == IEEE80211_VHT_CHANWIDTH_160MHZ) && 1731 /* XXX 2 means "160MHz and 80+80MHz", 1 means "160MHz" */ 1732 (MS(vap->iv_vhtcaps, 1733 IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_MASK) >= 1) && 1734 (vap->iv_flags_vht & IEEE80211_FVHT_USEVHT160)) { 1735 vhtflags = IEEE80211_CHAN_VHT160; 1736 /* Mirror the HT40 flags */ 1737 if (htflags == IEEE80211_CHAN_HT40U) { 1738 vhtflags |= IEEE80211_CHAN_HT40U; 1739 } else if (htflags == IEEE80211_CHAN_HT40D) { 1740 vhtflags |= IEEE80211_CHAN_HT40D; 1741 } 1742 } else if ((ni->ni_vht_chanwidth == IEEE80211_VHT_CHANWIDTH_80P80MHZ) && 1743 /* XXX 2 means "160MHz and 80+80MHz" */ 1744 (MS(vap->iv_vhtcaps, 1745 IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_MASK) == 2) && 1746 (vap->iv_flags_vht & IEEE80211_FVHT_USEVHT80P80)) { 1747 vhtflags = IEEE80211_CHAN_VHT80_80; 1748 /* Mirror the HT40 flags */ 1749 if (htflags == IEEE80211_CHAN_HT40U) { 1750 vhtflags |= IEEE80211_CHAN_HT40U; 1751 } else if (htflags == IEEE80211_CHAN_HT40D) { 1752 vhtflags |= IEEE80211_CHAN_HT40D; 1753 } 1754 } else if ((ni->ni_vht_chanwidth == IEEE80211_VHT_CHANWIDTH_80MHZ) && 1755 (vap->iv_flags_vht & IEEE80211_FVHT_USEVHT80)) { 1756 vhtflags = IEEE80211_CHAN_VHT80; 1757 /* Mirror the HT40 flags */ 1758 if (htflags == IEEE80211_CHAN_HT40U) { 1759 vhtflags |= IEEE80211_CHAN_HT40U; 1760 } else if (htflags == IEEE80211_CHAN_HT40D) { 1761 vhtflags |= IEEE80211_CHAN_HT40D; 1762 } 1763 } else if (ni->ni_vht_chanwidth == IEEE80211_VHT_CHANWIDTH_USE_HT) { 1764 /* Mirror the HT40 flags */ 1765 /* 1766 * XXX TODO: if ht40 is disabled, but vht40 isn't 1767 * disabled then this logic will get very, very sad. 1768 * It's quite possible the only sane thing to do is 1769 * to not have vht40 as an option, and just obey 1770 * 'ht40' as that flag. 1771 */ 1772 if ((htflags == IEEE80211_CHAN_HT40U) && 1773 (vap->iv_flags_vht & IEEE80211_FVHT_USEVHT40)) { 1774 vhtflags = IEEE80211_CHAN_VHT40U 1775 | IEEE80211_CHAN_HT40U; 1776 } else if (htflags == IEEE80211_CHAN_HT40D && 1777 (vap->iv_flags_vht & IEEE80211_FVHT_USEVHT40)) { 1778 vhtflags = IEEE80211_CHAN_VHT40D 1779 | IEEE80211_CHAN_HT40D; 1780 } else if (htflags == IEEE80211_CHAN_HT20) { 1781 vhtflags = IEEE80211_CHAN_VHT20 1782 | IEEE80211_CHAN_HT20; 1783 } 1784 } else { 1785 vhtflags = IEEE80211_CHAN_VHT20; 1786 } 1787 } 1788 return (vhtflags); 1789 } 1790 1791 /* 1792 * Final part of updating the HT parameters. 1793 * 1794 * This is called from the STA management path and 1795 * the ieee80211_node_join() path. It will take into 1796 * account the IEs discovered during scanning and 1797 * adjust things accordingly. 1798 * 1799 * This is done after a call to ieee80211_ht_updateparams() 1800 * because it (and the upcoming VHT version of updateparams) 1801 * needs to ensure everything is parsed before htinfo_update_chw() 1802 * is called - which will change the channel config for the 1803 * node for us. 1804 */ 1805 int 1806 ieee80211_ht_updateparams_final(struct ieee80211_node *ni, 1807 const uint8_t *htcapie, const uint8_t *htinfoie) 1808 { 1809 struct ieee80211vap *vap = ni->ni_vap; 1810 const struct ieee80211_ie_htinfo *htinfo; 1811 int htflags, vhtflags; 1812 int ret = 0; 1813 1814 htinfo = (const struct ieee80211_ie_htinfo *) htinfoie; 1815 1816 htflags = (vap->iv_flags_ht & IEEE80211_FHT_HT) ? 1817 IEEE80211_CHAN_HT20 : 0; 1818 1819 /* NB: honor operating mode constraint */ 1820 if ((htinfo->hi_byte1 & IEEE80211_HTINFO_TXWIDTH_2040) && 1821 (vap->iv_flags_ht & IEEE80211_FHT_USEHT40)) { 1822 if (ni->ni_ht2ndchan == IEEE80211_HTINFO_2NDCHAN_ABOVE) 1823 htflags = IEEE80211_CHAN_HT40U; 1824 else if (ni->ni_ht2ndchan == IEEE80211_HTINFO_2NDCHAN_BELOW) 1825 htflags = IEEE80211_CHAN_HT40D; 1826 } 1827 1828 /* 1829 * VHT flags - do much the same; check whether VHT is available 1830 * and if so, what our ideal channel use would be based on our 1831 * capabilities and the (pre-parsed) VHT info IE. 1832 */ 1833 vhtflags = ieee80211_vht_get_vhtflags(ni, htflags); 1834 1835 if (htinfo_update_chw(ni, htflags, vhtflags)) 1836 ret = 1; 1837 1838 return (ret); 1839 } 1840 1841 /* 1842 * Parse and update HT-related state extracted from the HT cap ie 1843 * for a station joining an HT BSS. 1844 * 1845 * This is called from the hostap path for each station. 1846 */ 1847 void 1848 ieee80211_ht_updatehtcap(struct ieee80211_node *ni, const uint8_t *htcapie) 1849 { 1850 struct ieee80211vap *vap = ni->ni_vap; 1851 1852 ieee80211_parse_htcap(ni, htcapie); 1853 if (vap->iv_htcaps & IEEE80211_HTCAP_SMPS) 1854 htcap_update_mimo_ps(ni); 1855 htcap_update_shortgi(ni); 1856 htcap_update_ldpc(ni); 1857 } 1858 1859 /* 1860 * Called once HT and VHT capabilities are parsed in hostap mode - 1861 * this will adjust the channel configuration of the given node 1862 * based on the configuration and capabilities. 1863 */ 1864 void 1865 ieee80211_ht_updatehtcap_final(struct ieee80211_node *ni) 1866 { 1867 struct ieee80211vap *vap = ni->ni_vap; 1868 int htflags; 1869 int vhtflags; 1870 1871 /* NB: honor operating mode constraint */ 1872 /* XXX 40 MHz intolerant */ 1873 htflags = (vap->iv_flags_ht & IEEE80211_FHT_HT) ? 1874 IEEE80211_CHAN_HT20 : 0; 1875 if ((ni->ni_htcap & IEEE80211_HTCAP_CHWIDTH40) && 1876 (vap->iv_flags_ht & IEEE80211_FHT_USEHT40)) { 1877 if (IEEE80211_IS_CHAN_HT40U(vap->iv_bss->ni_chan)) 1878 htflags = IEEE80211_CHAN_HT40U; 1879 else if (IEEE80211_IS_CHAN_HT40D(vap->iv_bss->ni_chan)) 1880 htflags = IEEE80211_CHAN_HT40D; 1881 } 1882 /* 1883 * VHT flags - do much the same; check whether VHT is available 1884 * and if so, what our ideal channel use would be based on our 1885 * capabilities and the (pre-parsed) VHT info IE. 1886 */ 1887 vhtflags = ieee80211_vht_get_vhtflags(ni, htflags); 1888 1889 (void) htinfo_update_chw(ni, htflags, vhtflags); 1890 } 1891 1892 /* 1893 * Install received HT rate set by parsing the HT cap ie. 1894 */ 1895 int 1896 ieee80211_setup_htrates(struct ieee80211_node *ni, const uint8_t *ie, int flags) 1897 { 1898 struct ieee80211com *ic = ni->ni_ic; 1899 struct ieee80211vap *vap = ni->ni_vap; 1900 const struct ieee80211_ie_htcap *htcap; 1901 struct ieee80211_htrateset *rs; 1902 int i, maxequalmcs, maxunequalmcs; 1903 1904 maxequalmcs = ic->ic_txstream * 8 - 1; 1905 maxunequalmcs = 0; 1906 if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL) { 1907 if (ic->ic_txstream >= 2) 1908 maxunequalmcs = 38; 1909 if (ic->ic_txstream >= 3) 1910 maxunequalmcs = 52; 1911 if (ic->ic_txstream >= 4) 1912 maxunequalmcs = 76; 1913 } 1914 1915 rs = &ni->ni_htrates; 1916 memset(rs, 0, sizeof(*rs)); 1917 if (ie != NULL) { 1918 if (ie[0] == IEEE80211_ELEMID_VENDOR) 1919 ie += 4; 1920 htcap = (const struct ieee80211_ie_htcap *) ie; 1921 for (i = 0; i < IEEE80211_HTRATE_MAXSIZE; i++) { 1922 if (isclr(htcap->hc_mcsset, i)) 1923 continue; 1924 if (rs->rs_nrates == IEEE80211_HTRATE_MAXSIZE) { 1925 IEEE80211_NOTE(vap, 1926 IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni, 1927 "WARNING, HT rate set too large; only " 1928 "using %u rates", IEEE80211_HTRATE_MAXSIZE); 1929 vap->iv_stats.is_rx_rstoobig++; 1930 break; 1931 } 1932 if (i <= 31 && i > maxequalmcs) 1933 continue; 1934 if (i == 32 && 1935 (ic->ic_htcaps & IEEE80211_HTC_TXMCS32) == 0) 1936 continue; 1937 if (i > 32 && i > maxunequalmcs) 1938 continue; 1939 rs->rs_rates[rs->rs_nrates++] = i; 1940 } 1941 } 1942 return ieee80211_fix_rate(ni, (struct ieee80211_rateset *) rs, flags); 1943 } 1944 1945 /* 1946 * Mark rates in a node's HT rate set as basic according 1947 * to the information in the supplied HT info ie. 1948 */ 1949 void 1950 ieee80211_setup_basic_htrates(struct ieee80211_node *ni, const uint8_t *ie) 1951 { 1952 const struct ieee80211_ie_htinfo *htinfo; 1953 struct ieee80211_htrateset *rs; 1954 int i, j; 1955 1956 if (ie[0] == IEEE80211_ELEMID_VENDOR) 1957 ie += 4; 1958 htinfo = (const struct ieee80211_ie_htinfo *) ie; 1959 rs = &ni->ni_htrates; 1960 if (rs->rs_nrates == 0) { 1961 IEEE80211_NOTE(ni->ni_vap, 1962 IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni, 1963 "%s", "WARNING, empty HT rate set"); 1964 return; 1965 } 1966 for (i = 0; i < IEEE80211_HTRATE_MAXSIZE; i++) { 1967 if (isclr(htinfo->hi_basicmcsset, i)) 1968 continue; 1969 for (j = 0; j < rs->rs_nrates; j++) 1970 if ((rs->rs_rates[j] & IEEE80211_RATE_VAL) == i) 1971 rs->rs_rates[j] |= IEEE80211_RATE_BASIC; 1972 } 1973 } 1974 1975 static void 1976 ampdu_tx_setup(struct ieee80211_tx_ampdu *tap) 1977 { 1978 callout_init(&tap->txa_timer, 1); 1979 tap->txa_flags |= IEEE80211_AGGR_SETUP; 1980 tap->txa_lastsample = ticks; 1981 } 1982 1983 static void 1984 ampdu_tx_stop(struct ieee80211_tx_ampdu *tap) 1985 { 1986 struct ieee80211_node *ni = tap->txa_ni; 1987 struct ieee80211com *ic = ni->ni_ic; 1988 1989 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N, 1990 tap->txa_ni, 1991 "%s: called", 1992 __func__); 1993 1994 KASSERT(tap->txa_flags & IEEE80211_AGGR_SETUP, 1995 ("txa_flags 0x%x tid %d ac %d", tap->txa_flags, tap->txa_tid, 1996 TID_TO_WME_AC(tap->txa_tid))); 1997 1998 /* 1999 * Stop BA stream if setup so driver has a chance 2000 * to reclaim any resources it might have allocated. 2001 */ 2002 ic->ic_addba_stop(ni, tap); 2003 /* 2004 * Stop any pending BAR transmit. 2005 */ 2006 bar_stop_timer(tap); 2007 2008 /* 2009 * Reset packet estimate. 2010 */ 2011 ieee80211_txampdu_init_pps(tap); 2012 2013 /* NB: clearing NAK means we may re-send ADDBA */ 2014 tap->txa_flags &= ~(IEEE80211_AGGR_SETUP | IEEE80211_AGGR_NAK); 2015 } 2016 2017 /* 2018 * ADDBA response timeout. 2019 * 2020 * If software aggregation and per-TID queue management was done here, 2021 * that queue would be unpaused after the ADDBA timeout occurs. 2022 */ 2023 static void 2024 addba_timeout(void *arg) 2025 { 2026 struct ieee80211_tx_ampdu *tap = arg; 2027 struct ieee80211_node *ni = tap->txa_ni; 2028 struct ieee80211com *ic = ni->ni_ic; 2029 2030 /* XXX ? */ 2031 tap->txa_flags &= ~IEEE80211_AGGR_XCHGPEND; 2032 tap->txa_attempts++; 2033 ic->ic_addba_response_timeout(ni, tap); 2034 } 2035 2036 static void 2037 addba_start_timeout(struct ieee80211_tx_ampdu *tap) 2038 { 2039 /* XXX use CALLOUT_PENDING instead? */ 2040 callout_reset(&tap->txa_timer, ieee80211_addba_timeout, 2041 addba_timeout, tap); 2042 tap->txa_flags |= IEEE80211_AGGR_XCHGPEND; 2043 tap->txa_nextrequest = ticks + ieee80211_addba_timeout; 2044 } 2045 2046 static void 2047 addba_stop_timeout(struct ieee80211_tx_ampdu *tap) 2048 { 2049 /* XXX use CALLOUT_PENDING instead? */ 2050 if (tap->txa_flags & IEEE80211_AGGR_XCHGPEND) { 2051 callout_stop(&tap->txa_timer); 2052 tap->txa_flags &= ~IEEE80211_AGGR_XCHGPEND; 2053 } 2054 } 2055 2056 static void 2057 null_addba_response_timeout(struct ieee80211_node *ni, 2058 struct ieee80211_tx_ampdu *tap) 2059 { 2060 } 2061 2062 /* 2063 * Default method for requesting A-MPDU tx aggregation. 2064 * We setup the specified state block and start a timer 2065 * to wait for an ADDBA response frame. 2066 */ 2067 static int 2068 ieee80211_addba_request(struct ieee80211_node *ni, 2069 struct ieee80211_tx_ampdu *tap, 2070 int dialogtoken, int baparamset, int batimeout) 2071 { 2072 int bufsiz; 2073 2074 /* XXX locking */ 2075 tap->txa_token = dialogtoken; 2076 tap->txa_flags |= IEEE80211_AGGR_IMMEDIATE; 2077 bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ); 2078 tap->txa_wnd = (bufsiz == 0) ? 2079 IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX); 2080 addba_start_timeout(tap); 2081 return 1; 2082 } 2083 2084 /* 2085 * Called by drivers that wish to request an ADDBA session be 2086 * setup. This brings it up and starts the request timer. 2087 */ 2088 int 2089 ieee80211_ampdu_tx_request_ext(struct ieee80211_node *ni, int tid) 2090 { 2091 struct ieee80211_tx_ampdu *tap; 2092 2093 if (tid < 0 || tid > 15) 2094 return (0); 2095 tap = &ni->ni_tx_ampdu[tid]; 2096 2097 /* XXX locking */ 2098 if ((tap->txa_flags & IEEE80211_AGGR_SETUP) == 0) { 2099 /* do deferred setup of state */ 2100 ampdu_tx_setup(tap); 2101 } 2102 /* XXX hack for not doing proper locking */ 2103 tap->txa_flags &= ~IEEE80211_AGGR_NAK; 2104 addba_start_timeout(tap); 2105 return (1); 2106 } 2107 2108 /* 2109 * Called by drivers that have marked a session as active. 2110 */ 2111 int 2112 ieee80211_ampdu_tx_request_active_ext(struct ieee80211_node *ni, int tid, 2113 int status) 2114 { 2115 struct ieee80211_tx_ampdu *tap; 2116 2117 if (tid < 0 || tid > 15) 2118 return (0); 2119 tap = &ni->ni_tx_ampdu[tid]; 2120 2121 /* XXX locking */ 2122 addba_stop_timeout(tap); 2123 if (status == 1) { 2124 tap->txa_flags |= IEEE80211_AGGR_RUNNING; 2125 tap->txa_attempts = 0; 2126 } else { 2127 /* mark tid so we don't try again */ 2128 tap->txa_flags |= IEEE80211_AGGR_NAK; 2129 } 2130 return (1); 2131 } 2132 2133 /* 2134 * Default method for processing an A-MPDU tx aggregation 2135 * response. We shutdown any pending timer and update the 2136 * state block according to the reply. 2137 */ 2138 static int 2139 ieee80211_addba_response(struct ieee80211_node *ni, 2140 struct ieee80211_tx_ampdu *tap, 2141 int status, int baparamset, int batimeout) 2142 { 2143 int bufsiz, tid; 2144 2145 /* XXX locking */ 2146 addba_stop_timeout(tap); 2147 if (status == IEEE80211_STATUS_SUCCESS) { 2148 bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ); 2149 /* XXX override our request? */ 2150 tap->txa_wnd = (bufsiz == 0) ? 2151 IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX); 2152 /* XXX AC/TID */ 2153 tid = MS(baparamset, IEEE80211_BAPS_TID); 2154 tap->txa_flags |= IEEE80211_AGGR_RUNNING; 2155 tap->txa_attempts = 0; 2156 } else { 2157 /* mark tid so we don't try again */ 2158 tap->txa_flags |= IEEE80211_AGGR_NAK; 2159 } 2160 return 1; 2161 } 2162 2163 /* 2164 * Default method for stopping A-MPDU tx aggregation. 2165 * Any timer is cleared and we drain any pending frames. 2166 */ 2167 static void 2168 ieee80211_addba_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap) 2169 { 2170 /* XXX locking */ 2171 addba_stop_timeout(tap); 2172 if (tap->txa_flags & IEEE80211_AGGR_RUNNING) { 2173 /* XXX clear aggregation queue */ 2174 tap->txa_flags &= ~IEEE80211_AGGR_RUNNING; 2175 } 2176 tap->txa_attempts = 0; 2177 } 2178 2179 /* 2180 * Process a received action frame using the default aggregation 2181 * policy. We intercept ADDBA-related frames and use them to 2182 * update our aggregation state. All other frames are passed up 2183 * for processing by ieee80211_recv_action. 2184 */ 2185 static int 2186 ht_recv_action_ba_addba_request(struct ieee80211_node *ni, 2187 const struct ieee80211_frame *wh, 2188 const uint8_t *frm, const uint8_t *efrm) 2189 { 2190 struct ieee80211com *ic = ni->ni_ic; 2191 struct ieee80211vap *vap = ni->ni_vap; 2192 struct ieee80211_rx_ampdu *rap; 2193 uint8_t dialogtoken; 2194 uint16_t baparamset, batimeout, baseqctl; 2195 uint16_t args[5]; 2196 int tid; 2197 2198 dialogtoken = frm[2]; 2199 baparamset = le16dec(frm+3); 2200 batimeout = le16dec(frm+5); 2201 baseqctl = le16dec(frm+7); 2202 2203 tid = MS(baparamset, IEEE80211_BAPS_TID); 2204 2205 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 2206 "recv ADDBA request: dialogtoken %u baparamset 0x%x " 2207 "(tid %d bufsiz %d) batimeout %d baseqctl %d:%d", 2208 dialogtoken, baparamset, 2209 tid, MS(baparamset, IEEE80211_BAPS_BUFSIZ), 2210 batimeout, 2211 MS(baseqctl, IEEE80211_BASEQ_START), 2212 MS(baseqctl, IEEE80211_BASEQ_FRAG)); 2213 2214 rap = &ni->ni_rx_ampdu[tid]; 2215 2216 /* Send ADDBA response */ 2217 args[0] = dialogtoken; 2218 /* 2219 * NB: We ack only if the sta associated with HT and 2220 * the ap is configured to do AMPDU rx (the latter 2221 * violates the 11n spec and is mostly for testing). 2222 */ 2223 if ((ni->ni_flags & IEEE80211_NODE_AMPDU_RX) && 2224 (vap->iv_flags_ht & IEEE80211_FHT_AMPDU_RX)) { 2225 /* XXX handle ampdu_rx_start failure */ 2226 ic->ic_ampdu_rx_start(ni, rap, 2227 baparamset, batimeout, baseqctl); 2228 2229 args[1] = IEEE80211_STATUS_SUCCESS; 2230 } else { 2231 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 2232 ni, "reject ADDBA request: %s", 2233 ni->ni_flags & IEEE80211_NODE_AMPDU_RX ? 2234 "administratively disabled" : 2235 "not negotiated for station"); 2236 vap->iv_stats.is_addba_reject++; 2237 args[1] = IEEE80211_STATUS_UNSPECIFIED; 2238 } 2239 /* XXX honor rap flags? */ 2240 args[2] = IEEE80211_BAPS_POLICY_IMMEDIATE 2241 | SM(tid, IEEE80211_BAPS_TID) 2242 | SM(rap->rxa_wnd, IEEE80211_BAPS_BUFSIZ) 2243 ; 2244 args[3] = 0; 2245 args[4] = 0; 2246 ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA, 2247 IEEE80211_ACTION_BA_ADDBA_RESPONSE, args); 2248 return 0; 2249 } 2250 2251 static int 2252 ht_recv_action_ba_addba_response(struct ieee80211_node *ni, 2253 const struct ieee80211_frame *wh, 2254 const uint8_t *frm, const uint8_t *efrm) 2255 { 2256 struct ieee80211com *ic = ni->ni_ic; 2257 struct ieee80211vap *vap = ni->ni_vap; 2258 struct ieee80211_tx_ampdu *tap; 2259 uint8_t dialogtoken, policy; 2260 uint16_t baparamset, batimeout, code; 2261 int tid, bufsiz; 2262 2263 dialogtoken = frm[2]; 2264 code = le16dec(frm+3); 2265 baparamset = le16dec(frm+5); 2266 tid = MS(baparamset, IEEE80211_BAPS_TID); 2267 bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ); 2268 policy = MS(baparamset, IEEE80211_BAPS_POLICY); 2269 batimeout = le16dec(frm+7); 2270 2271 tap = &ni->ni_tx_ampdu[tid]; 2272 if ((tap->txa_flags & IEEE80211_AGGR_XCHGPEND) == 0) { 2273 IEEE80211_DISCARD_MAC(vap, 2274 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 2275 ni->ni_macaddr, "ADDBA response", 2276 "no pending ADDBA, tid %d dialogtoken %u " 2277 "code %d", tid, dialogtoken, code); 2278 vap->iv_stats.is_addba_norequest++; 2279 return 0; 2280 } 2281 if (dialogtoken != tap->txa_token) { 2282 IEEE80211_DISCARD_MAC(vap, 2283 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 2284 ni->ni_macaddr, "ADDBA response", 2285 "dialogtoken mismatch: waiting for %d, " 2286 "received %d, tid %d code %d", 2287 tap->txa_token, dialogtoken, tid, code); 2288 vap->iv_stats.is_addba_badtoken++; 2289 return 0; 2290 } 2291 /* NB: assumes IEEE80211_AGGR_IMMEDIATE is 1 */ 2292 if (policy != (tap->txa_flags & IEEE80211_AGGR_IMMEDIATE)) { 2293 IEEE80211_DISCARD_MAC(vap, 2294 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 2295 ni->ni_macaddr, "ADDBA response", 2296 "policy mismatch: expecting %s, " 2297 "received %s, tid %d code %d", 2298 tap->txa_flags & IEEE80211_AGGR_IMMEDIATE, 2299 policy, tid, code); 2300 vap->iv_stats.is_addba_badpolicy++; 2301 return 0; 2302 } 2303 #if 0 2304 /* XXX we take MIN in ieee80211_addba_response */ 2305 if (bufsiz > IEEE80211_AGGR_BAWMAX) { 2306 IEEE80211_DISCARD_MAC(vap, 2307 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 2308 ni->ni_macaddr, "ADDBA response", 2309 "BA window too large: max %d, " 2310 "received %d, tid %d code %d", 2311 bufsiz, IEEE80211_AGGR_BAWMAX, tid, code); 2312 vap->iv_stats.is_addba_badbawinsize++; 2313 return 0; 2314 } 2315 #endif 2316 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 2317 "recv ADDBA response: dialogtoken %u code %d " 2318 "baparamset 0x%x (tid %d bufsiz %d) batimeout %d", 2319 dialogtoken, code, baparamset, tid, bufsiz, 2320 batimeout); 2321 ic->ic_addba_response(ni, tap, code, baparamset, batimeout); 2322 return 0; 2323 } 2324 2325 static int 2326 ht_recv_action_ba_delba(struct ieee80211_node *ni, 2327 const struct ieee80211_frame *wh, 2328 const uint8_t *frm, const uint8_t *efrm) 2329 { 2330 struct ieee80211com *ic = ni->ni_ic; 2331 struct ieee80211_rx_ampdu *rap; 2332 struct ieee80211_tx_ampdu *tap; 2333 uint16_t baparamset, code; 2334 int tid; 2335 2336 baparamset = le16dec(frm+2); 2337 code = le16dec(frm+4); 2338 2339 tid = MS(baparamset, IEEE80211_DELBAPS_TID); 2340 2341 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 2342 "recv DELBA: baparamset 0x%x (tid %d initiator %d) " 2343 "code %d", baparamset, tid, 2344 MS(baparamset, IEEE80211_DELBAPS_INIT), code); 2345 2346 if ((baparamset & IEEE80211_DELBAPS_INIT) == 0) { 2347 tap = &ni->ni_tx_ampdu[tid]; 2348 ic->ic_addba_stop(ni, tap); 2349 } else { 2350 rap = &ni->ni_rx_ampdu[tid]; 2351 ic->ic_ampdu_rx_stop(ni, rap); 2352 } 2353 return 0; 2354 } 2355 2356 static int 2357 ht_recv_action_ht_txchwidth(struct ieee80211_node *ni, 2358 const struct ieee80211_frame *wh, 2359 const uint8_t *frm, const uint8_t *efrm) 2360 { 2361 int chw; 2362 2363 chw = (frm[2] == IEEE80211_A_HT_TXCHWIDTH_2040) ? 40 : 20; 2364 2365 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 2366 "%s: HT txchwidth, width %d%s", 2367 __func__, chw, ni->ni_chw != chw ? "*" : ""); 2368 if (chw != ni->ni_chw) { 2369 /* XXX does this need to change the ht40 station count? */ 2370 ni->ni_chw = chw; 2371 /* XXX notify on change */ 2372 } 2373 return 0; 2374 } 2375 2376 static int 2377 ht_recv_action_ht_mimopwrsave(struct ieee80211_node *ni, 2378 const struct ieee80211_frame *wh, 2379 const uint8_t *frm, const uint8_t *efrm) 2380 { 2381 const struct ieee80211_action_ht_mimopowersave *mps = 2382 (const struct ieee80211_action_ht_mimopowersave *) frm; 2383 2384 /* XXX check iv_htcaps */ 2385 if (mps->am_control & IEEE80211_A_HT_MIMOPWRSAVE_ENA) 2386 ni->ni_flags |= IEEE80211_NODE_MIMO_PS; 2387 else 2388 ni->ni_flags &= ~IEEE80211_NODE_MIMO_PS; 2389 if (mps->am_control & IEEE80211_A_HT_MIMOPWRSAVE_MODE) 2390 ni->ni_flags |= IEEE80211_NODE_MIMO_RTS; 2391 else 2392 ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS; 2393 /* XXX notify on change */ 2394 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 2395 "%s: HT MIMO PS (%s%s)", __func__, 2396 (ni->ni_flags & IEEE80211_NODE_MIMO_PS) ? "on" : "off", 2397 (ni->ni_flags & IEEE80211_NODE_MIMO_RTS) ? "+rts" : "" 2398 ); 2399 return 0; 2400 } 2401 2402 /* 2403 * Transmit processing. 2404 */ 2405 2406 /* 2407 * Check if A-MPDU should be requested/enabled for a stream. 2408 * We require a traffic rate above a per-AC threshold and we 2409 * also handle backoff from previous failed attempts. 2410 * 2411 * Drivers may override this method to bring in information 2412 * such as link state conditions in making the decision. 2413 */ 2414 static int 2415 ieee80211_ampdu_enable(struct ieee80211_node *ni, 2416 struct ieee80211_tx_ampdu *tap) 2417 { 2418 struct ieee80211vap *vap = ni->ni_vap; 2419 2420 if (tap->txa_avgpps < 2421 vap->iv_ampdu_mintraffic[TID_TO_WME_AC(tap->txa_tid)]) 2422 return 0; 2423 /* XXX check rssi? */ 2424 if (tap->txa_attempts >= ieee80211_addba_maxtries && 2425 ieee80211_time_after(ticks, tap->txa_nextrequest)) { 2426 /* 2427 * Don't retry too often; txa_nextrequest is set 2428 * to the minimum interval we'll retry after 2429 * ieee80211_addba_maxtries failed attempts are made. 2430 */ 2431 return 0; 2432 } 2433 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni, 2434 "enable AMPDU on tid %d (%s), avgpps %d pkts %d attempt %d", 2435 tap->txa_tid, ieee80211_wme_acnames[TID_TO_WME_AC(tap->txa_tid)], 2436 tap->txa_avgpps, tap->txa_pkts, tap->txa_attempts); 2437 return 1; 2438 } 2439 2440 /* 2441 * Request A-MPDU tx aggregation. Setup local state and 2442 * issue an ADDBA request. BA use will only happen after 2443 * the other end replies with ADDBA response. 2444 */ 2445 int 2446 ieee80211_ampdu_request(struct ieee80211_node *ni, 2447 struct ieee80211_tx_ampdu *tap) 2448 { 2449 struct ieee80211com *ic = ni->ni_ic; 2450 uint16_t args[5]; 2451 int tid, dialogtoken; 2452 static int tokens = 0; /* XXX */ 2453 2454 /* XXX locking */ 2455 if ((tap->txa_flags & IEEE80211_AGGR_SETUP) == 0) { 2456 /* do deferred setup of state */ 2457 ampdu_tx_setup(tap); 2458 } 2459 /* XXX hack for not doing proper locking */ 2460 tap->txa_flags &= ~IEEE80211_AGGR_NAK; 2461 2462 dialogtoken = (tokens+1) % 63; /* XXX */ 2463 tid = tap->txa_tid; 2464 2465 /* 2466 * XXX TODO: This is racy with any other parallel TX going on. :( 2467 */ 2468 tap->txa_start = ni->ni_txseqs[tid]; 2469 2470 args[0] = dialogtoken; 2471 args[1] = 0; /* NB: status code not used */ 2472 args[2] = IEEE80211_BAPS_POLICY_IMMEDIATE 2473 | SM(tid, IEEE80211_BAPS_TID) 2474 | SM(IEEE80211_AGGR_BAWMAX, IEEE80211_BAPS_BUFSIZ) 2475 ; 2476 args[3] = 0; /* batimeout */ 2477 /* NB: do first so there's no race against reply */ 2478 if (!ic->ic_addba_request(ni, tap, dialogtoken, args[2], args[3])) { 2479 /* unable to setup state, don't make request */ 2480 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 2481 ni, "%s: could not setup BA stream for TID %d AC %d", 2482 __func__, tap->txa_tid, TID_TO_WME_AC(tap->txa_tid)); 2483 /* defer next try so we don't slam the driver with requests */ 2484 tap->txa_attempts = ieee80211_addba_maxtries; 2485 /* NB: check in case driver wants to override */ 2486 if (tap->txa_nextrequest <= ticks) 2487 tap->txa_nextrequest = ticks + ieee80211_addba_backoff; 2488 return 0; 2489 } 2490 tokens = dialogtoken; /* allocate token */ 2491 /* NB: after calling ic_addba_request so driver can set txa_start */ 2492 args[4] = SM(tap->txa_start, IEEE80211_BASEQ_START) 2493 | SM(0, IEEE80211_BASEQ_FRAG) 2494 ; 2495 return ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA, 2496 IEEE80211_ACTION_BA_ADDBA_REQUEST, args); 2497 } 2498 2499 /* 2500 * Terminate an AMPDU tx stream. State is reclaimed 2501 * and the peer notified with a DelBA Action frame. 2502 */ 2503 void 2504 ieee80211_ampdu_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 2505 int reason) 2506 { 2507 struct ieee80211com *ic = ni->ni_ic; 2508 struct ieee80211vap *vap = ni->ni_vap; 2509 uint16_t args[4]; 2510 2511 /* XXX locking */ 2512 tap->txa_flags &= ~IEEE80211_AGGR_BARPEND; 2513 if (IEEE80211_AMPDU_RUNNING(tap)) { 2514 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 2515 ni, "%s: stop BA stream for TID %d (reason: %d (%s))", 2516 __func__, tap->txa_tid, reason, 2517 ieee80211_reason_to_string(reason)); 2518 vap->iv_stats.is_ampdu_stop++; 2519 2520 ic->ic_addba_stop(ni, tap); 2521 args[0] = tap->txa_tid; 2522 args[1] = IEEE80211_DELBAPS_INIT; 2523 args[2] = reason; /* XXX reason code */ 2524 ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA, 2525 IEEE80211_ACTION_BA_DELBA, args); 2526 } else { 2527 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 2528 ni, "%s: BA stream for TID %d not running " 2529 "(reason: %d (%s))", __func__, tap->txa_tid, reason, 2530 ieee80211_reason_to_string(reason)); 2531 vap->iv_stats.is_ampdu_stop_failed++; 2532 } 2533 } 2534 2535 /* XXX */ 2536 static void bar_start_timer(struct ieee80211_tx_ampdu *tap); 2537 2538 static void 2539 bar_timeout(void *arg) 2540 { 2541 struct ieee80211_tx_ampdu *tap = arg; 2542 struct ieee80211_node *ni = tap->txa_ni; 2543 2544 KASSERT((tap->txa_flags & IEEE80211_AGGR_XCHGPEND) == 0, 2545 ("bar/addba collision, flags 0x%x", tap->txa_flags)); 2546 2547 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 2548 ni, "%s: tid %u flags 0x%x attempts %d", __func__, 2549 tap->txa_tid, tap->txa_flags, tap->txa_attempts); 2550 2551 /* guard against race with bar_tx_complete */ 2552 if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) == 0) 2553 return; 2554 /* XXX ? */ 2555 if (tap->txa_attempts >= ieee80211_bar_maxtries) { 2556 struct ieee80211com *ic = ni->ni_ic; 2557 2558 ni->ni_vap->iv_stats.is_ampdu_bar_tx_fail++; 2559 /* 2560 * If (at least) the last BAR TX timeout was due to 2561 * an ieee80211_send_bar() failures, then we need 2562 * to make sure we notify the driver that a BAR 2563 * TX did occur and fail. This gives the driver 2564 * a chance to undo any queue pause that may 2565 * have occurred. 2566 */ 2567 ic->ic_bar_response(ni, tap, 1); 2568 ieee80211_ampdu_stop(ni, tap, IEEE80211_REASON_TIMEOUT); 2569 } else { 2570 ni->ni_vap->iv_stats.is_ampdu_bar_tx_retry++; 2571 if (ieee80211_send_bar(ni, tap, tap->txa_seqpending) != 0) { 2572 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 2573 ni, "%s: failed to TX, starting timer\n", 2574 __func__); 2575 /* 2576 * If ieee80211_send_bar() fails here, the 2577 * timer may have stopped and/or the pending 2578 * flag may be clear. Because of this, 2579 * fake the BARPEND and reset the timer. 2580 * A retransmission attempt will then occur 2581 * during the next timeout. 2582 */ 2583 /* XXX locking */ 2584 tap->txa_flags |= IEEE80211_AGGR_BARPEND; 2585 bar_start_timer(tap); 2586 } 2587 } 2588 } 2589 2590 static void 2591 bar_start_timer(struct ieee80211_tx_ampdu *tap) 2592 { 2593 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N, 2594 tap->txa_ni, 2595 "%s: called", 2596 __func__); 2597 callout_reset(&tap->txa_timer, ieee80211_bar_timeout, bar_timeout, tap); 2598 } 2599 2600 static void 2601 bar_stop_timer(struct ieee80211_tx_ampdu *tap) 2602 { 2603 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N, 2604 tap->txa_ni, 2605 "%s: called", 2606 __func__); 2607 callout_stop(&tap->txa_timer); 2608 } 2609 2610 static void 2611 bar_tx_complete(struct ieee80211_node *ni, void *arg, int status) 2612 { 2613 struct ieee80211_tx_ampdu *tap = arg; 2614 2615 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 2616 ni, "%s: tid %u flags 0x%x pending %d status %d", 2617 __func__, tap->txa_tid, tap->txa_flags, 2618 callout_pending(&tap->txa_timer), status); 2619 2620 ni->ni_vap->iv_stats.is_ampdu_bar_tx++; 2621 /* XXX locking */ 2622 if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) && 2623 callout_pending(&tap->txa_timer)) { 2624 struct ieee80211com *ic = ni->ni_ic; 2625 2626 if (status == 0) /* ACK'd */ 2627 bar_stop_timer(tap); 2628 ic->ic_bar_response(ni, tap, status); 2629 /* NB: just let timer expire so we pace requests */ 2630 } 2631 } 2632 2633 static void 2634 ieee80211_bar_response(struct ieee80211_node *ni, 2635 struct ieee80211_tx_ampdu *tap, int status) 2636 { 2637 2638 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N, 2639 tap->txa_ni, 2640 "%s: called", 2641 __func__); 2642 if (status == 0) { /* got ACK */ 2643 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 2644 ni, "BAR moves BA win <%u:%u> (%u frames) txseq %u tid %u", 2645 tap->txa_start, 2646 IEEE80211_SEQ_ADD(tap->txa_start, tap->txa_wnd-1), 2647 tap->txa_qframes, tap->txa_seqpending, 2648 tap->txa_tid); 2649 2650 /* NB: timer already stopped in bar_tx_complete */ 2651 tap->txa_start = tap->txa_seqpending; 2652 tap->txa_flags &= ~IEEE80211_AGGR_BARPEND; 2653 } 2654 } 2655 2656 /* 2657 * Transmit a BAR frame to the specified node. The 2658 * BAR contents are drawn from the supplied aggregation 2659 * state associated with the node. 2660 * 2661 * NB: we only handle immediate ACK w/ compressed bitmap. 2662 */ 2663 int 2664 ieee80211_send_bar(struct ieee80211_node *ni, 2665 struct ieee80211_tx_ampdu *tap, ieee80211_seq seq) 2666 { 2667 #define senderr(_x, _v) do { vap->iv_stats._v++; ret = _x; goto bad; } while (0) 2668 struct ieee80211vap *vap = ni->ni_vap; 2669 struct ieee80211com *ic = ni->ni_ic; 2670 struct ieee80211_frame_bar *bar; 2671 struct mbuf *m; 2672 uint16_t barctl, barseqctl; 2673 uint8_t *frm; 2674 int tid, ret; 2675 2676 2677 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N, 2678 tap->txa_ni, 2679 "%s: called", 2680 __func__); 2681 2682 if ((tap->txa_flags & IEEE80211_AGGR_RUNNING) == 0) { 2683 /* no ADDBA response, should not happen */ 2684 /* XXX stat+msg */ 2685 return EINVAL; 2686 } 2687 /* XXX locking */ 2688 bar_stop_timer(tap); 2689 2690 ieee80211_ref_node(ni); 2691 2692 m = ieee80211_getmgtframe(&frm, ic->ic_headroom, sizeof(*bar)); 2693 if (m == NULL) 2694 senderr(ENOMEM, is_tx_nobuf); 2695 2696 if (!ieee80211_add_callback(m, bar_tx_complete, tap)) { 2697 m_freem(m); 2698 senderr(ENOMEM, is_tx_nobuf); /* XXX */ 2699 /* NOTREACHED */ 2700 } 2701 2702 bar = mtod(m, struct ieee80211_frame_bar *); 2703 bar->i_fc[0] = IEEE80211_FC0_VERSION_0 | 2704 IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_BAR; 2705 bar->i_fc[1] = 0; 2706 IEEE80211_ADDR_COPY(bar->i_ra, ni->ni_macaddr); 2707 IEEE80211_ADDR_COPY(bar->i_ta, vap->iv_myaddr); 2708 2709 tid = tap->txa_tid; 2710 barctl = (tap->txa_flags & IEEE80211_AGGR_IMMEDIATE ? 2711 0 : IEEE80211_BAR_NOACK) 2712 | IEEE80211_BAR_COMP 2713 | SM(tid, IEEE80211_BAR_TID) 2714 ; 2715 barseqctl = SM(seq, IEEE80211_BAR_SEQ_START); 2716 /* NB: known to have proper alignment */ 2717 bar->i_ctl = htole16(barctl); 2718 bar->i_seq = htole16(barseqctl); 2719 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_bar); 2720 2721 M_WME_SETAC(m, WME_AC_VO); 2722 2723 IEEE80211_NODE_STAT(ni, tx_mgmt); /* XXX tx_ctl? */ 2724 2725 /* XXX locking */ 2726 /* init/bump attempts counter */ 2727 if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) == 0) 2728 tap->txa_attempts = 1; 2729 else 2730 tap->txa_attempts++; 2731 tap->txa_seqpending = seq; 2732 tap->txa_flags |= IEEE80211_AGGR_BARPEND; 2733 2734 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_11N, 2735 ni, "send BAR: tid %u ctl 0x%x start %u (attempt %d)", 2736 tid, barctl, seq, tap->txa_attempts); 2737 2738 /* 2739 * ic_raw_xmit will free the node reference 2740 * regardless of queue/TX success or failure. 2741 */ 2742 IEEE80211_TX_LOCK(ic); 2743 ret = ieee80211_raw_output(vap, ni, m, NULL); 2744 IEEE80211_TX_UNLOCK(ic); 2745 if (ret != 0) { 2746 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_11N, 2747 ni, "send BAR: failed: (ret = %d)\n", 2748 ret); 2749 /* xmit failed, clear state flag */ 2750 tap->txa_flags &= ~IEEE80211_AGGR_BARPEND; 2751 vap->iv_stats.is_ampdu_bar_tx_fail++; 2752 return ret; 2753 } 2754 /* XXX hack against tx complete happening before timer is started */ 2755 if (tap->txa_flags & IEEE80211_AGGR_BARPEND) 2756 bar_start_timer(tap); 2757 return 0; 2758 bad: 2759 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N, 2760 tap->txa_ni, 2761 "%s: bad! ret=%d", 2762 __func__, ret); 2763 vap->iv_stats.is_ampdu_bar_tx_fail++; 2764 ieee80211_free_node(ni); 2765 return ret; 2766 #undef senderr 2767 } 2768 2769 static int 2770 ht_action_output(struct ieee80211_node *ni, struct mbuf *m) 2771 { 2772 struct ieee80211_bpf_params params; 2773 2774 memset(¶ms, 0, sizeof(params)); 2775 params.ibp_pri = WME_AC_VO; 2776 params.ibp_rate0 = ni->ni_txparms->mgmtrate; 2777 /* NB: we know all frames are unicast */ 2778 params.ibp_try0 = ni->ni_txparms->maxretry; 2779 params.ibp_power = ni->ni_txpower; 2780 return ieee80211_mgmt_output(ni, m, IEEE80211_FC0_SUBTYPE_ACTION, 2781 ¶ms); 2782 } 2783 2784 #define ADDSHORT(frm, v) do { \ 2785 frm[0] = (v) & 0xff; \ 2786 frm[1] = (v) >> 8; \ 2787 frm += 2; \ 2788 } while (0) 2789 2790 /* 2791 * Send an action management frame. The arguments are stuff 2792 * into a frame without inspection; the caller is assumed to 2793 * prepare them carefully (e.g. based on the aggregation state). 2794 */ 2795 static int 2796 ht_send_action_ba_addba(struct ieee80211_node *ni, 2797 int category, int action, void *arg0) 2798 { 2799 struct ieee80211vap *vap = ni->ni_vap; 2800 struct ieee80211com *ic = ni->ni_ic; 2801 uint16_t *args = arg0; 2802 struct mbuf *m; 2803 uint8_t *frm; 2804 2805 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 2806 "send ADDBA %s: dialogtoken %d status %d " 2807 "baparamset 0x%x (tid %d) batimeout 0x%x baseqctl 0x%x", 2808 (action == IEEE80211_ACTION_BA_ADDBA_REQUEST) ? 2809 "request" : "response", 2810 args[0], args[1], args[2], MS(args[2], IEEE80211_BAPS_TID), 2811 args[3], args[4]); 2812 2813 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2814 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2815 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2816 ieee80211_ref_node(ni); 2817 2818 m = ieee80211_getmgtframe(&frm, 2819 ic->ic_headroom + sizeof(struct ieee80211_frame), 2820 sizeof(uint16_t) /* action+category */ 2821 /* XXX may action payload */ 2822 + sizeof(struct ieee80211_action_ba_addbaresponse) 2823 ); 2824 if (m != NULL) { 2825 *frm++ = category; 2826 *frm++ = action; 2827 *frm++ = args[0]; /* dialog token */ 2828 if (action == IEEE80211_ACTION_BA_ADDBA_RESPONSE) 2829 ADDSHORT(frm, args[1]); /* status code */ 2830 ADDSHORT(frm, args[2]); /* baparamset */ 2831 ADDSHORT(frm, args[3]); /* batimeout */ 2832 if (action == IEEE80211_ACTION_BA_ADDBA_REQUEST) 2833 ADDSHORT(frm, args[4]); /* baseqctl */ 2834 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2835 return ht_action_output(ni, m); 2836 } else { 2837 vap->iv_stats.is_tx_nobuf++; 2838 ieee80211_free_node(ni); 2839 return ENOMEM; 2840 } 2841 } 2842 2843 static int 2844 ht_send_action_ba_delba(struct ieee80211_node *ni, 2845 int category, int action, void *arg0) 2846 { 2847 struct ieee80211vap *vap = ni->ni_vap; 2848 struct ieee80211com *ic = ni->ni_ic; 2849 uint16_t *args = arg0; 2850 struct mbuf *m; 2851 uint16_t baparamset; 2852 uint8_t *frm; 2853 2854 baparamset = SM(args[0], IEEE80211_DELBAPS_TID) 2855 | args[1] 2856 ; 2857 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 2858 "send DELBA action: tid %d, initiator %d reason %d (%s)", 2859 args[0], args[1], args[2], ieee80211_reason_to_string(args[2])); 2860 2861 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2862 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2863 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2864 ieee80211_ref_node(ni); 2865 2866 m = ieee80211_getmgtframe(&frm, 2867 ic->ic_headroom + sizeof(struct ieee80211_frame), 2868 sizeof(uint16_t) /* action+category */ 2869 /* XXX may action payload */ 2870 + sizeof(struct ieee80211_action_ba_addbaresponse) 2871 ); 2872 if (m != NULL) { 2873 *frm++ = category; 2874 *frm++ = action; 2875 ADDSHORT(frm, baparamset); 2876 ADDSHORT(frm, args[2]); /* reason code */ 2877 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2878 return ht_action_output(ni, m); 2879 } else { 2880 vap->iv_stats.is_tx_nobuf++; 2881 ieee80211_free_node(ni); 2882 return ENOMEM; 2883 } 2884 } 2885 2886 static int 2887 ht_send_action_ht_txchwidth(struct ieee80211_node *ni, 2888 int category, int action, void *arg0) 2889 { 2890 struct ieee80211vap *vap = ni->ni_vap; 2891 struct ieee80211com *ic = ni->ni_ic; 2892 struct mbuf *m; 2893 uint8_t *frm; 2894 2895 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 2896 "send HT txchwidth: width %d", 2897 IEEE80211_IS_CHAN_HT40(ni->ni_chan) ? 40 : 20); 2898 2899 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2900 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2901 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2902 ieee80211_ref_node(ni); 2903 2904 m = ieee80211_getmgtframe(&frm, 2905 ic->ic_headroom + sizeof(struct ieee80211_frame), 2906 sizeof(uint16_t) /* action+category */ 2907 /* XXX may action payload */ 2908 + sizeof(struct ieee80211_action_ba_addbaresponse) 2909 ); 2910 if (m != NULL) { 2911 *frm++ = category; 2912 *frm++ = action; 2913 *frm++ = IEEE80211_IS_CHAN_HT40(ni->ni_chan) ? 2914 IEEE80211_A_HT_TXCHWIDTH_2040 : 2915 IEEE80211_A_HT_TXCHWIDTH_20; 2916 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2917 return ht_action_output(ni, m); 2918 } else { 2919 vap->iv_stats.is_tx_nobuf++; 2920 ieee80211_free_node(ni); 2921 return ENOMEM; 2922 } 2923 } 2924 #undef ADDSHORT 2925 2926 /* 2927 * Construct the MCS bit mask for inclusion in an HT capabilities 2928 * information element. 2929 */ 2930 static void 2931 ieee80211_set_mcsset(struct ieee80211com *ic, uint8_t *frm) 2932 { 2933 int i; 2934 uint8_t txparams; 2935 2936 KASSERT((ic->ic_rxstream > 0 && ic->ic_rxstream <= 4), 2937 ("ic_rxstream %d out of range", ic->ic_rxstream)); 2938 KASSERT((ic->ic_txstream > 0 && ic->ic_txstream <= 4), 2939 ("ic_txstream %d out of range", ic->ic_txstream)); 2940 2941 for (i = 0; i < ic->ic_rxstream * 8; i++) 2942 setbit(frm, i); 2943 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) && 2944 (ic->ic_htcaps & IEEE80211_HTC_RXMCS32)) 2945 setbit(frm, 32); 2946 if (ic->ic_htcaps & IEEE80211_HTC_RXUNEQUAL) { 2947 if (ic->ic_rxstream >= 2) { 2948 for (i = 33; i <= 38; i++) 2949 setbit(frm, i); 2950 } 2951 if (ic->ic_rxstream >= 3) { 2952 for (i = 39; i <= 52; i++) 2953 setbit(frm, i); 2954 } 2955 if (ic->ic_txstream >= 4) { 2956 for (i = 53; i <= 76; i++) 2957 setbit(frm, i); 2958 } 2959 } 2960 2961 if (ic->ic_rxstream != ic->ic_txstream) { 2962 txparams = 0x1; /* TX MCS set defined */ 2963 txparams |= 0x2; /* TX RX MCS not equal */ 2964 txparams |= (ic->ic_txstream - 1) << 2; /* num TX streams */ 2965 if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL) 2966 txparams |= 0x16; /* TX unequal modulation sup */ 2967 } else 2968 txparams = 0; 2969 frm[12] = txparams; 2970 } 2971 2972 /* 2973 * Add body of an HTCAP information element. 2974 */ 2975 static uint8_t * 2976 ieee80211_add_htcap_body(uint8_t *frm, struct ieee80211_node *ni) 2977 { 2978 #define ADDSHORT(frm, v) do { \ 2979 frm[0] = (v) & 0xff; \ 2980 frm[1] = (v) >> 8; \ 2981 frm += 2; \ 2982 } while (0) 2983 struct ieee80211com *ic = ni->ni_ic; 2984 struct ieee80211vap *vap = ni->ni_vap; 2985 uint16_t caps, extcaps; 2986 int rxmax, density; 2987 2988 /* HT capabilities */ 2989 caps = vap->iv_htcaps & 0xffff; 2990 /* 2991 * Note channel width depends on whether we are operating as 2992 * a sta or not. When operating as a sta we are generating 2993 * a request based on our desired configuration. Otherwise 2994 * we are operational and the channel attributes identify 2995 * how we've been setup (which might be different if a fixed 2996 * channel is specified). 2997 */ 2998 if (vap->iv_opmode == IEEE80211_M_STA) { 2999 /* override 20/40 use based on config */ 3000 if (vap->iv_flags_ht & IEEE80211_FHT_USEHT40) 3001 caps |= IEEE80211_HTCAP_CHWIDTH40; 3002 else 3003 caps &= ~IEEE80211_HTCAP_CHWIDTH40; 3004 3005 /* Start by using the advertised settings */ 3006 rxmax = MS(ni->ni_htparam, IEEE80211_HTCAP_MAXRXAMPDU); 3007 density = MS(ni->ni_htparam, IEEE80211_HTCAP_MPDUDENSITY); 3008 3009 IEEE80211_DPRINTF(vap, IEEE80211_MSG_11N, 3010 "%s: advertised rxmax=%d, density=%d, vap rxmax=%d, density=%d\n", 3011 __func__, 3012 rxmax, 3013 density, 3014 vap->iv_ampdu_rxmax, 3015 vap->iv_ampdu_density); 3016 3017 /* Cap at VAP rxmax */ 3018 if (rxmax > vap->iv_ampdu_rxmax) 3019 rxmax = vap->iv_ampdu_rxmax; 3020 3021 /* 3022 * If the VAP ampdu density value greater, use that. 3023 * 3024 * (Larger density value == larger minimum gap between A-MPDU 3025 * subframes.) 3026 */ 3027 if (vap->iv_ampdu_density > density) 3028 density = vap->iv_ampdu_density; 3029 3030 /* 3031 * NB: Hardware might support HT40 on some but not all 3032 * channels. We can't determine this earlier because only 3033 * after association the channel is upgraded to HT based 3034 * on the negotiated capabilities. 3035 */ 3036 if (ni->ni_chan != IEEE80211_CHAN_ANYC && 3037 findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT40U) == NULL && 3038 findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT40D) == NULL) 3039 caps &= ~IEEE80211_HTCAP_CHWIDTH40; 3040 } else { 3041 /* override 20/40 use based on current channel */ 3042 if (IEEE80211_IS_CHAN_HT40(ni->ni_chan)) 3043 caps |= IEEE80211_HTCAP_CHWIDTH40; 3044 else 3045 caps &= ~IEEE80211_HTCAP_CHWIDTH40; 3046 3047 /* XXX TODO should it start by using advertised settings? */ 3048 rxmax = vap->iv_ampdu_rxmax; 3049 density = vap->iv_ampdu_density; 3050 } 3051 3052 /* adjust short GI based on channel and config */ 3053 if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20) == 0) 3054 caps &= ~IEEE80211_HTCAP_SHORTGI20; 3055 if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40) == 0 || 3056 (caps & IEEE80211_HTCAP_CHWIDTH40) == 0) 3057 caps &= ~IEEE80211_HTCAP_SHORTGI40; 3058 3059 /* adjust STBC based on receive capabilities */ 3060 if ((vap->iv_flags_ht & IEEE80211_FHT_STBC_RX) == 0) 3061 caps &= ~IEEE80211_HTCAP_RXSTBC; 3062 3063 /* adjust LDPC based on receive capabilites */ 3064 if ((vap->iv_flags_ht & IEEE80211_FHT_LDPC_RX) == 0) 3065 caps &= ~IEEE80211_HTCAP_LDPC; 3066 3067 ADDSHORT(frm, caps); 3068 3069 /* HT parameters */ 3070 *frm = SM(rxmax, IEEE80211_HTCAP_MAXRXAMPDU) 3071 | SM(density, IEEE80211_HTCAP_MPDUDENSITY) 3072 ; 3073 frm++; 3074 3075 /* pre-zero remainder of ie */ 3076 memset(frm, 0, sizeof(struct ieee80211_ie_htcap) - 3077 __offsetof(struct ieee80211_ie_htcap, hc_mcsset)); 3078 3079 /* supported MCS set */ 3080 /* 3081 * XXX: For sta mode the rate set should be restricted based 3082 * on the AP's capabilities, but ni_htrates isn't setup when 3083 * we're called to form an AssocReq frame so for now we're 3084 * restricted to the device capabilities. 3085 */ 3086 ieee80211_set_mcsset(ni->ni_ic, frm); 3087 3088 frm += __offsetof(struct ieee80211_ie_htcap, hc_extcap) - 3089 __offsetof(struct ieee80211_ie_htcap, hc_mcsset); 3090 3091 /* HT extended capabilities */ 3092 extcaps = vap->iv_htextcaps & 0xffff; 3093 3094 ADDSHORT(frm, extcaps); 3095 3096 frm += sizeof(struct ieee80211_ie_htcap) - 3097 __offsetof(struct ieee80211_ie_htcap, hc_txbf); 3098 3099 return frm; 3100 #undef ADDSHORT 3101 } 3102 3103 /* 3104 * Add 802.11n HT capabilities information element 3105 */ 3106 uint8_t * 3107 ieee80211_add_htcap(uint8_t *frm, struct ieee80211_node *ni) 3108 { 3109 frm[0] = IEEE80211_ELEMID_HTCAP; 3110 frm[1] = sizeof(struct ieee80211_ie_htcap) - 2; 3111 return ieee80211_add_htcap_body(frm + 2, ni); 3112 } 3113 3114 /* 3115 * Non-associated probe request - add HT capabilities based on 3116 * the current channel configuration. 3117 */ 3118 static uint8_t * 3119 ieee80211_add_htcap_body_ch(uint8_t *frm, struct ieee80211vap *vap, 3120 struct ieee80211_channel *c) 3121 { 3122 #define ADDSHORT(frm, v) do { \ 3123 frm[0] = (v) & 0xff; \ 3124 frm[1] = (v) >> 8; \ 3125 frm += 2; \ 3126 } while (0) 3127 struct ieee80211com *ic = vap->iv_ic; 3128 uint16_t caps, extcaps; 3129 int rxmax, density; 3130 3131 /* HT capabilities */ 3132 caps = vap->iv_htcaps & 0xffff; 3133 3134 /* 3135 * We don't use this in STA mode; only in IBSS mode. 3136 * So in IBSS mode we base our HTCAP flags on the 3137 * given channel. 3138 */ 3139 3140 /* override 20/40 use based on current channel */ 3141 if (IEEE80211_IS_CHAN_HT40(c)) 3142 caps |= IEEE80211_HTCAP_CHWIDTH40; 3143 else 3144 caps &= ~IEEE80211_HTCAP_CHWIDTH40; 3145 3146 /* Use the currently configured values */ 3147 rxmax = vap->iv_ampdu_rxmax; 3148 density = vap->iv_ampdu_density; 3149 3150 /* adjust short GI based on channel and config */ 3151 if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20) == 0) 3152 caps &= ~IEEE80211_HTCAP_SHORTGI20; 3153 if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40) == 0 || 3154 (caps & IEEE80211_HTCAP_CHWIDTH40) == 0) 3155 caps &= ~IEEE80211_HTCAP_SHORTGI40; 3156 ADDSHORT(frm, caps); 3157 3158 /* HT parameters */ 3159 *frm = SM(rxmax, IEEE80211_HTCAP_MAXRXAMPDU) 3160 | SM(density, IEEE80211_HTCAP_MPDUDENSITY) 3161 ; 3162 frm++; 3163 3164 /* pre-zero remainder of ie */ 3165 memset(frm, 0, sizeof(struct ieee80211_ie_htcap) - 3166 __offsetof(struct ieee80211_ie_htcap, hc_mcsset)); 3167 3168 /* supported MCS set */ 3169 /* 3170 * XXX: For sta mode the rate set should be restricted based 3171 * on the AP's capabilities, but ni_htrates isn't setup when 3172 * we're called to form an AssocReq frame so for now we're 3173 * restricted to the device capabilities. 3174 */ 3175 ieee80211_set_mcsset(ic, frm); 3176 3177 frm += __offsetof(struct ieee80211_ie_htcap, hc_extcap) - 3178 __offsetof(struct ieee80211_ie_htcap, hc_mcsset); 3179 3180 /* HT extended capabilities */ 3181 extcaps = vap->iv_htextcaps & 0xffff; 3182 3183 ADDSHORT(frm, extcaps); 3184 3185 frm += sizeof(struct ieee80211_ie_htcap) - 3186 __offsetof(struct ieee80211_ie_htcap, hc_txbf); 3187 3188 return frm; 3189 #undef ADDSHORT 3190 } 3191 3192 /* 3193 * Add 802.11n HT capabilities information element 3194 */ 3195 uint8_t * 3196 ieee80211_add_htcap_ch(uint8_t *frm, struct ieee80211vap *vap, 3197 struct ieee80211_channel *c) 3198 { 3199 frm[0] = IEEE80211_ELEMID_HTCAP; 3200 frm[1] = sizeof(struct ieee80211_ie_htcap) - 2; 3201 return ieee80211_add_htcap_body_ch(frm + 2, vap, c); 3202 } 3203 3204 /* 3205 * Add Broadcom OUI wrapped standard HTCAP ie; this is 3206 * used for compatibility w/ pre-draft implementations. 3207 */ 3208 uint8_t * 3209 ieee80211_add_htcap_vendor(uint8_t *frm, struct ieee80211_node *ni) 3210 { 3211 frm[0] = IEEE80211_ELEMID_VENDOR; 3212 frm[1] = 4 + sizeof(struct ieee80211_ie_htcap) - 2; 3213 frm[2] = (BCM_OUI >> 0) & 0xff; 3214 frm[3] = (BCM_OUI >> 8) & 0xff; 3215 frm[4] = (BCM_OUI >> 16) & 0xff; 3216 frm[5] = BCM_OUI_HTCAP; 3217 return ieee80211_add_htcap_body(frm + 6, ni); 3218 } 3219 3220 /* 3221 * Construct the MCS bit mask of basic rates 3222 * for inclusion in an HT information element. 3223 */ 3224 static void 3225 ieee80211_set_basic_htrates(uint8_t *frm, const struct ieee80211_htrateset *rs) 3226 { 3227 int i; 3228 3229 for (i = 0; i < rs->rs_nrates; i++) { 3230 int r = rs->rs_rates[i] & IEEE80211_RATE_VAL; 3231 if ((rs->rs_rates[i] & IEEE80211_RATE_BASIC) && 3232 r < IEEE80211_HTRATE_MAXSIZE) { 3233 /* NB: this assumes a particular implementation */ 3234 setbit(frm, r); 3235 } 3236 } 3237 } 3238 3239 /* 3240 * Update the HTINFO ie for a beacon frame. 3241 */ 3242 void 3243 ieee80211_ht_update_beacon(struct ieee80211vap *vap, 3244 struct ieee80211_beacon_offsets *bo) 3245 { 3246 #define PROTMODE (IEEE80211_HTINFO_OPMODE|IEEE80211_HTINFO_NONHT_PRESENT) 3247 struct ieee80211_node *ni; 3248 const struct ieee80211_channel *bsschan; 3249 struct ieee80211com *ic = vap->iv_ic; 3250 struct ieee80211_ie_htinfo *ht = 3251 (struct ieee80211_ie_htinfo *) bo->bo_htinfo; 3252 3253 ni = ieee80211_ref_node(vap->iv_bss); 3254 bsschan = ni->ni_chan; 3255 3256 /* XXX only update on channel change */ 3257 ht->hi_ctrlchannel = ieee80211_chan2ieee(ic, bsschan); 3258 if (vap->iv_flags_ht & IEEE80211_FHT_RIFS) 3259 ht->hi_byte1 = IEEE80211_HTINFO_RIFSMODE_PERM; 3260 else 3261 ht->hi_byte1 = IEEE80211_HTINFO_RIFSMODE_PROH; 3262 if (IEEE80211_IS_CHAN_HT40U(bsschan)) 3263 ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_ABOVE; 3264 else if (IEEE80211_IS_CHAN_HT40D(bsschan)) 3265 ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_BELOW; 3266 else 3267 ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_NONE; 3268 if (IEEE80211_IS_CHAN_HT40(bsschan)) 3269 ht->hi_byte1 |= IEEE80211_HTINFO_TXWIDTH_2040; 3270 3271 /* protection mode */ 3272 ht->hi_byte2 = (ht->hi_byte2 &~ PROTMODE) | ic->ic_curhtprotmode; 3273 3274 ieee80211_free_node(ni); 3275 3276 /* XXX propagate to vendor ie's */ 3277 #undef PROTMODE 3278 } 3279 3280 /* 3281 * Add body of an HTINFO information element. 3282 * 3283 * NB: We don't use struct ieee80211_ie_htinfo because we can 3284 * be called to fillin both a standard ie and a compat ie that 3285 * has a vendor OUI at the front. 3286 */ 3287 static uint8_t * 3288 ieee80211_add_htinfo_body(uint8_t *frm, struct ieee80211_node *ni) 3289 { 3290 struct ieee80211vap *vap = ni->ni_vap; 3291 struct ieee80211com *ic = ni->ni_ic; 3292 3293 /* pre-zero remainder of ie */ 3294 memset(frm, 0, sizeof(struct ieee80211_ie_htinfo) - 2); 3295 3296 /* primary/control channel center */ 3297 *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan); 3298 3299 if (vap->iv_flags_ht & IEEE80211_FHT_RIFS) 3300 frm[0] = IEEE80211_HTINFO_RIFSMODE_PERM; 3301 else 3302 frm[0] = IEEE80211_HTINFO_RIFSMODE_PROH; 3303 if (IEEE80211_IS_CHAN_HT40U(ni->ni_chan)) 3304 frm[0] |= IEEE80211_HTINFO_2NDCHAN_ABOVE; 3305 else if (IEEE80211_IS_CHAN_HT40D(ni->ni_chan)) 3306 frm[0] |= IEEE80211_HTINFO_2NDCHAN_BELOW; 3307 else 3308 frm[0] |= IEEE80211_HTINFO_2NDCHAN_NONE; 3309 if (IEEE80211_IS_CHAN_HT40(ni->ni_chan)) 3310 frm[0] |= IEEE80211_HTINFO_TXWIDTH_2040; 3311 3312 frm[1] = ic->ic_curhtprotmode; 3313 3314 frm += 5; 3315 3316 /* basic MCS set */ 3317 ieee80211_set_basic_htrates(frm, &ni->ni_htrates); 3318 frm += sizeof(struct ieee80211_ie_htinfo) - 3319 __offsetof(struct ieee80211_ie_htinfo, hi_basicmcsset); 3320 return frm; 3321 } 3322 3323 /* 3324 * Add 802.11n HT information information element. 3325 */ 3326 uint8_t * 3327 ieee80211_add_htinfo(uint8_t *frm, struct ieee80211_node *ni) 3328 { 3329 frm[0] = IEEE80211_ELEMID_HTINFO; 3330 frm[1] = sizeof(struct ieee80211_ie_htinfo) - 2; 3331 return ieee80211_add_htinfo_body(frm + 2, ni); 3332 } 3333 3334 /* 3335 * Add Broadcom OUI wrapped standard HTINFO ie; this is 3336 * used for compatibility w/ pre-draft implementations. 3337 */ 3338 uint8_t * 3339 ieee80211_add_htinfo_vendor(uint8_t *frm, struct ieee80211_node *ni) 3340 { 3341 frm[0] = IEEE80211_ELEMID_VENDOR; 3342 frm[1] = 4 + sizeof(struct ieee80211_ie_htinfo) - 2; 3343 frm[2] = (BCM_OUI >> 0) & 0xff; 3344 frm[3] = (BCM_OUI >> 8) & 0xff; 3345 frm[4] = (BCM_OUI >> 16) & 0xff; 3346 frm[5] = BCM_OUI_HTINFO; 3347 return ieee80211_add_htinfo_body(frm + 6, ni); 3348 } 3349