1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 /* 29 * IEEE 802.11n protocol support. 30 */ 31 32 #include "opt_inet.h" 33 #include "opt_wlan.h" 34 35 #include <sys/param.h> 36 #include <sys/kernel.h> 37 #include <sys/malloc.h> 38 #include <sys/systm.h> 39 #include <sys/endian.h> 40 41 #include <sys/socket.h> 42 43 #include <net/if.h> 44 #include <net/if_var.h> 45 #include <net/if_media.h> 46 #include <net/ethernet.h> 47 48 #include <net80211/ieee80211_var.h> 49 #include <net80211/ieee80211_action.h> 50 #include <net80211/ieee80211_input.h> 51 52 const struct ieee80211_mcs_rates ieee80211_htrates[IEEE80211_HTRATE_MAXSIZE] = { 53 { 13, 14, 27, 30 }, /* MCS 0 */ 54 { 26, 29, 54, 60 }, /* MCS 1 */ 55 { 39, 43, 81, 90 }, /* MCS 2 */ 56 { 52, 58, 108, 120 }, /* MCS 3 */ 57 { 78, 87, 162, 180 }, /* MCS 4 */ 58 { 104, 116, 216, 240 }, /* MCS 5 */ 59 { 117, 130, 243, 270 }, /* MCS 6 */ 60 { 130, 144, 270, 300 }, /* MCS 7 */ 61 { 26, 29, 54, 60 }, /* MCS 8 */ 62 { 52, 58, 108, 120 }, /* MCS 9 */ 63 { 78, 87, 162, 180 }, /* MCS 10 */ 64 { 104, 116, 216, 240 }, /* MCS 11 */ 65 { 156, 173, 324, 360 }, /* MCS 12 */ 66 { 208, 231, 432, 480 }, /* MCS 13 */ 67 { 234, 260, 486, 540 }, /* MCS 14 */ 68 { 260, 289, 540, 600 }, /* MCS 15 */ 69 { 39, 43, 81, 90 }, /* MCS 16 */ 70 { 78, 87, 162, 180 }, /* MCS 17 */ 71 { 117, 130, 243, 270 }, /* MCS 18 */ 72 { 156, 173, 324, 360 }, /* MCS 19 */ 73 { 234, 260, 486, 540 }, /* MCS 20 */ 74 { 312, 347, 648, 720 }, /* MCS 21 */ 75 { 351, 390, 729, 810 }, /* MCS 22 */ 76 { 390, 433, 810, 900 }, /* MCS 23 */ 77 { 52, 58, 108, 120 }, /* MCS 24 */ 78 { 104, 116, 216, 240 }, /* MCS 25 */ 79 { 156, 173, 324, 360 }, /* MCS 26 */ 80 { 208, 231, 432, 480 }, /* MCS 27 */ 81 { 312, 347, 648, 720 }, /* MCS 28 */ 82 { 416, 462, 864, 960 }, /* MCS 29 */ 83 { 468, 520, 972, 1080 }, /* MCS 30 */ 84 { 520, 578, 1080, 1200 }, /* MCS 31 */ 85 { 0, 0, 12, 13 }, /* MCS 32 */ 86 { 78, 87, 162, 180 }, /* MCS 33 */ 87 { 104, 116, 216, 240 }, /* MCS 34 */ 88 { 130, 144, 270, 300 }, /* MCS 35 */ 89 { 117, 130, 243, 270 }, /* MCS 36 */ 90 { 156, 173, 324, 360 }, /* MCS 37 */ 91 { 195, 217, 405, 450 }, /* MCS 38 */ 92 { 104, 116, 216, 240 }, /* MCS 39 */ 93 { 130, 144, 270, 300 }, /* MCS 40 */ 94 { 130, 144, 270, 300 }, /* MCS 41 */ 95 { 156, 173, 324, 360 }, /* MCS 42 */ 96 { 182, 202, 378, 420 }, /* MCS 43 */ 97 { 182, 202, 378, 420 }, /* MCS 44 */ 98 { 208, 231, 432, 480 }, /* MCS 45 */ 99 { 156, 173, 324, 360 }, /* MCS 46 */ 100 { 195, 217, 405, 450 }, /* MCS 47 */ 101 { 195, 217, 405, 450 }, /* MCS 48 */ 102 { 234, 260, 486, 540 }, /* MCS 49 */ 103 { 273, 303, 567, 630 }, /* MCS 50 */ 104 { 273, 303, 567, 630 }, /* MCS 51 */ 105 { 312, 347, 648, 720 }, /* MCS 52 */ 106 { 130, 144, 270, 300 }, /* MCS 53 */ 107 { 156, 173, 324, 360 }, /* MCS 54 */ 108 { 182, 202, 378, 420 }, /* MCS 55 */ 109 { 156, 173, 324, 360 }, /* MCS 56 */ 110 { 182, 202, 378, 420 }, /* MCS 57 */ 111 { 208, 231, 432, 480 }, /* MCS 58 */ 112 { 234, 260, 486, 540 }, /* MCS 59 */ 113 { 208, 231, 432, 480 }, /* MCS 60 */ 114 { 234, 260, 486, 540 }, /* MCS 61 */ 115 { 260, 289, 540, 600 }, /* MCS 62 */ 116 { 260, 289, 540, 600 }, /* MCS 63 */ 117 { 286, 318, 594, 660 }, /* MCS 64 */ 118 { 195, 217, 405, 450 }, /* MCS 65 */ 119 { 234, 260, 486, 540 }, /* MCS 66 */ 120 { 273, 303, 567, 630 }, /* MCS 67 */ 121 { 234, 260, 486, 540 }, /* MCS 68 */ 122 { 273, 303, 567, 630 }, /* MCS 69 */ 123 { 312, 347, 648, 720 }, /* MCS 70 */ 124 { 351, 390, 729, 810 }, /* MCS 71 */ 125 { 312, 347, 648, 720 }, /* MCS 72 */ 126 { 351, 390, 729, 810 }, /* MCS 73 */ 127 { 390, 433, 810, 900 }, /* MCS 74 */ 128 { 390, 433, 810, 900 }, /* MCS 75 */ 129 { 429, 477, 891, 990 }, /* MCS 76 */ 130 }; 131 132 static int ieee80211_ampdu_age = -1; /* threshold for ampdu reorder q (ms) */ 133 SYSCTL_PROC(_net_wlan, OID_AUTO, ampdu_age, 134 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 135 &ieee80211_ampdu_age, 0, ieee80211_sysctl_msecs_ticks, "I", 136 "AMPDU max reorder age (ms)"); 137 138 static int ieee80211_recv_bar_ena = 1; 139 SYSCTL_INT(_net_wlan, OID_AUTO, recv_bar, CTLFLAG_RW, &ieee80211_recv_bar_ena, 140 0, "BAR frame processing (ena/dis)"); 141 142 static int ieee80211_addba_timeout = -1;/* timeout for ADDBA response */ 143 SYSCTL_PROC(_net_wlan, OID_AUTO, addba_timeout, 144 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 145 &ieee80211_addba_timeout, 0, ieee80211_sysctl_msecs_ticks, "I", 146 "ADDBA request timeout (ms)"); 147 static int ieee80211_addba_backoff = -1;/* backoff after max ADDBA requests */ 148 SYSCTL_PROC(_net_wlan, OID_AUTO, addba_backoff, 149 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, 150 &ieee80211_addba_backoff, 0, ieee80211_sysctl_msecs_ticks, "I", 151 "ADDBA request backoff (ms)"); 152 static int ieee80211_addba_maxtries = 3;/* max ADDBA requests before backoff */ 153 SYSCTL_INT(_net_wlan, OID_AUTO, addba_maxtries, CTLFLAG_RW, 154 &ieee80211_addba_maxtries, 0, "max ADDBA requests sent before backoff"); 155 156 static int ieee80211_bar_timeout = -1; /* timeout waiting for BAR response */ 157 static int ieee80211_bar_maxtries = 50;/* max BAR requests before DELBA */ 158 159 static ieee80211_recv_action_func ht_recv_action_ba_addba_request; 160 static ieee80211_recv_action_func ht_recv_action_ba_addba_response; 161 static ieee80211_recv_action_func ht_recv_action_ba_delba; 162 static ieee80211_recv_action_func ht_recv_action_ht_mimopwrsave; 163 static ieee80211_recv_action_func ht_recv_action_ht_txchwidth; 164 165 static ieee80211_send_action_func ht_send_action_ba_addba; 166 static ieee80211_send_action_func ht_send_action_ba_delba; 167 static ieee80211_send_action_func ht_send_action_ht_txchwidth; 168 169 static void 170 ieee80211_ht_init(void *dummy __unused) 171 { 172 /* 173 * Setup HT parameters that depends on the clock frequency. 174 */ 175 ieee80211_ampdu_age = msecs_to_ticks(500); 176 ieee80211_addba_timeout = msecs_to_ticks(250); 177 ieee80211_addba_backoff = msecs_to_ticks(10*1000); 178 ieee80211_bar_timeout = msecs_to_ticks(250); 179 /* 180 * Register action frame handlers. 181 */ 182 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA, 183 IEEE80211_ACTION_BA_ADDBA_REQUEST, ht_recv_action_ba_addba_request); 184 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA, 185 IEEE80211_ACTION_BA_ADDBA_RESPONSE, ht_recv_action_ba_addba_response); 186 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA, 187 IEEE80211_ACTION_BA_DELBA, ht_recv_action_ba_delba); 188 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_HT, 189 IEEE80211_ACTION_HT_MIMOPWRSAVE, ht_recv_action_ht_mimopwrsave); 190 ieee80211_recv_action_register(IEEE80211_ACTION_CAT_HT, 191 IEEE80211_ACTION_HT_TXCHWIDTH, ht_recv_action_ht_txchwidth); 192 193 ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA, 194 IEEE80211_ACTION_BA_ADDBA_REQUEST, ht_send_action_ba_addba); 195 ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA, 196 IEEE80211_ACTION_BA_ADDBA_RESPONSE, ht_send_action_ba_addba); 197 ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA, 198 IEEE80211_ACTION_BA_DELBA, ht_send_action_ba_delba); 199 ieee80211_send_action_register(IEEE80211_ACTION_CAT_HT, 200 IEEE80211_ACTION_HT_TXCHWIDTH, ht_send_action_ht_txchwidth); 201 } 202 SYSINIT(wlan_ht, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_ht_init, NULL); 203 204 static int ieee80211_ampdu_enable(struct ieee80211_node *ni, 205 struct ieee80211_tx_ampdu *tap); 206 static int ieee80211_addba_request(struct ieee80211_node *ni, 207 struct ieee80211_tx_ampdu *tap, 208 int dialogtoken, int baparamset, int batimeout); 209 static int ieee80211_addba_response(struct ieee80211_node *ni, 210 struct ieee80211_tx_ampdu *tap, 211 int code, int baparamset, int batimeout); 212 static void ieee80211_addba_stop(struct ieee80211_node *ni, 213 struct ieee80211_tx_ampdu *tap); 214 static void null_addba_response_timeout(struct ieee80211_node *ni, 215 struct ieee80211_tx_ampdu *tap); 216 217 static void ieee80211_bar_response(struct ieee80211_node *ni, 218 struct ieee80211_tx_ampdu *tap, int status); 219 static void ampdu_tx_stop(struct ieee80211_tx_ampdu *tap); 220 static void bar_stop_timer(struct ieee80211_tx_ampdu *tap); 221 static int ampdu_rx_start(struct ieee80211_node *, struct ieee80211_rx_ampdu *, 222 int baparamset, int batimeout, int baseqctl); 223 static void ampdu_rx_stop(struct ieee80211_node *, struct ieee80211_rx_ampdu *); 224 225 void 226 ieee80211_ht_attach(struct ieee80211com *ic) 227 { 228 /* setup default aggregation policy */ 229 ic->ic_recv_action = ieee80211_recv_action; 230 ic->ic_send_action = ieee80211_send_action; 231 ic->ic_ampdu_enable = ieee80211_ampdu_enable; 232 ic->ic_addba_request = ieee80211_addba_request; 233 ic->ic_addba_response = ieee80211_addba_response; 234 ic->ic_addba_response_timeout = null_addba_response_timeout; 235 ic->ic_addba_stop = ieee80211_addba_stop; 236 ic->ic_bar_response = ieee80211_bar_response; 237 ic->ic_ampdu_rx_start = ampdu_rx_start; 238 ic->ic_ampdu_rx_stop = ampdu_rx_stop; 239 240 ic->ic_htprotmode = IEEE80211_PROT_RTSCTS; 241 ic->ic_curhtprotmode = IEEE80211_HTINFO_OPMODE_PURE; 242 } 243 244 void 245 ieee80211_ht_detach(struct ieee80211com *ic) 246 { 247 } 248 249 void 250 ieee80211_ht_vattach(struct ieee80211vap *vap) 251 { 252 253 /* driver can override defaults */ 254 vap->iv_ampdu_rxmax = IEEE80211_HTCAP_MAXRXAMPDU_8K; 255 vap->iv_ampdu_density = IEEE80211_HTCAP_MPDUDENSITY_NA; 256 vap->iv_ampdu_limit = vap->iv_ampdu_rxmax; 257 vap->iv_amsdu_limit = vap->iv_htcaps & IEEE80211_HTCAP_MAXAMSDU; 258 /* tx aggregation traffic thresholds */ 259 vap->iv_ampdu_mintraffic[WME_AC_BK] = 128; 260 vap->iv_ampdu_mintraffic[WME_AC_BE] = 64; 261 vap->iv_ampdu_mintraffic[WME_AC_VO] = 32; 262 vap->iv_ampdu_mintraffic[WME_AC_VI] = 32; 263 264 vap->iv_htprotmode = IEEE80211_PROT_RTSCTS; 265 vap->iv_curhtprotmode = IEEE80211_HTINFO_OPMODE_PURE; 266 267 if (vap->iv_htcaps & IEEE80211_HTC_HT) { 268 /* 269 * Device is HT capable; enable all HT-related 270 * facilities by default. 271 * XXX these choices may be too aggressive. 272 */ 273 vap->iv_flags_ht |= IEEE80211_FHT_HT 274 | IEEE80211_FHT_HTCOMPAT 275 ; 276 if (vap->iv_htcaps & IEEE80211_HTCAP_SHORTGI20) 277 vap->iv_flags_ht |= IEEE80211_FHT_SHORTGI20; 278 /* XXX infer from channel list? */ 279 if (vap->iv_htcaps & IEEE80211_HTCAP_CHWIDTH40) { 280 vap->iv_flags_ht |= IEEE80211_FHT_USEHT40; 281 if (vap->iv_htcaps & IEEE80211_HTCAP_SHORTGI40) 282 vap->iv_flags_ht |= IEEE80211_FHT_SHORTGI40; 283 } 284 /* enable RIFS if capable */ 285 if (vap->iv_htcaps & IEEE80211_HTC_RIFS) 286 vap->iv_flags_ht |= IEEE80211_FHT_RIFS; 287 288 /* NB: A-MPDU and A-MSDU rx are mandated, these are tx only */ 289 vap->iv_flags_ht |= IEEE80211_FHT_AMPDU_RX; 290 if (vap->iv_htcaps & IEEE80211_HTC_AMPDU) 291 vap->iv_flags_ht |= IEEE80211_FHT_AMPDU_TX; 292 vap->iv_flags_ht |= IEEE80211_FHT_AMSDU_RX; 293 if (vap->iv_htcaps & IEEE80211_HTC_AMSDU) 294 vap->iv_flags_ht |= IEEE80211_FHT_AMSDU_TX; 295 296 if (vap->iv_htcaps & IEEE80211_HTCAP_TXSTBC) 297 vap->iv_flags_ht |= IEEE80211_FHT_STBC_TX; 298 if (vap->iv_htcaps & IEEE80211_HTCAP_RXSTBC) 299 vap->iv_flags_ht |= IEEE80211_FHT_STBC_RX; 300 301 if (vap->iv_htcaps & IEEE80211_HTCAP_LDPC) 302 vap->iv_flags_ht |= IEEE80211_FHT_LDPC_RX; 303 if (vap->iv_htcaps & IEEE80211_HTC_TXLDPC) 304 vap->iv_flags_ht |= IEEE80211_FHT_LDPC_TX; 305 } 306 /* NB: disable default legacy WDS, too many issues right now */ 307 if (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) 308 vap->iv_flags_ht &= ~IEEE80211_FHT_HT; 309 } 310 311 void 312 ieee80211_ht_vdetach(struct ieee80211vap *vap) 313 { 314 } 315 316 static int 317 ht_getrate(struct ieee80211com *ic, int index, enum ieee80211_phymode mode, 318 int ratetype) 319 { 320 struct ieee80211_node_txrate tr; 321 int mword, rate; 322 323 tr = IEEE80211_NODE_TXRATE_INIT_HT(index); 324 325 mword = ieee80211_rate2media(ic, &tr, mode); 326 if (IFM_SUBTYPE(mword) != IFM_IEEE80211_MCS) 327 return (0); 328 switch (ratetype) { 329 case 0: 330 rate = ieee80211_htrates[index].ht20_rate_800ns; 331 break; 332 case 1: 333 rate = ieee80211_htrates[index].ht20_rate_400ns; 334 break; 335 case 2: 336 rate = ieee80211_htrates[index].ht40_rate_800ns; 337 break; 338 default: 339 rate = ieee80211_htrates[index].ht40_rate_400ns; 340 break; 341 } 342 return (rate); 343 } 344 345 static struct printranges { 346 int minmcs; 347 int maxmcs; 348 int txstream; 349 int ratetype; 350 int htcapflags; 351 } ranges[] = { 352 { 0, 7, 1, 0, 0 }, 353 { 8, 15, 2, 0, 0 }, 354 { 16, 23, 3, 0, 0 }, 355 { 24, 31, 4, 0, 0 }, 356 { 32, 0, 1, 2, IEEE80211_HTC_TXMCS32 }, 357 { 33, 38, 2, 0, IEEE80211_HTC_TXUNEQUAL }, 358 { 39, 52, 3, 0, IEEE80211_HTC_TXUNEQUAL }, 359 { 53, 76, 4, 0, IEEE80211_HTC_TXUNEQUAL }, 360 { 0, 0, 0, 0, 0 }, 361 }; 362 363 static void 364 ht_rateprint(struct ieee80211com *ic, enum ieee80211_phymode mode, int ratetype) 365 { 366 int minrate, maxrate; 367 struct printranges *range; 368 369 for (range = ranges; range->txstream != 0; range++) { 370 if (ic->ic_txstream < range->txstream) 371 continue; 372 if (range->htcapflags && 373 (ic->ic_htcaps & range->htcapflags) == 0) 374 continue; 375 if (ratetype < range->ratetype) 376 continue; 377 minrate = ht_getrate(ic, range->minmcs, mode, ratetype); 378 maxrate = ht_getrate(ic, range->maxmcs, mode, ratetype); 379 if (range->maxmcs) { 380 ic_printf(ic, "MCS %d-%d: %d%sMbps - %d%sMbps\n", 381 range->minmcs, range->maxmcs, 382 minrate/2, ((minrate & 0x1) != 0 ? ".5" : ""), 383 maxrate/2, ((maxrate & 0x1) != 0 ? ".5" : "")); 384 } else { 385 ic_printf(ic, "MCS %d: %d%sMbps\n", range->minmcs, 386 minrate/2, ((minrate & 0x1) != 0 ? ".5" : "")); 387 } 388 } 389 } 390 391 static void 392 ht_announce(struct ieee80211com *ic, enum ieee80211_phymode mode) 393 { 394 const char *modestr = ieee80211_phymode_name[mode]; 395 396 ic_printf(ic, "%s MCS 20MHz\n", modestr); 397 ht_rateprint(ic, mode, 0); 398 if (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20) { 399 ic_printf(ic, "%s MCS 20MHz SGI\n", modestr); 400 ht_rateprint(ic, mode, 1); 401 } 402 if (ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) { 403 ic_printf(ic, "%s MCS 40MHz:\n", modestr); 404 ht_rateprint(ic, mode, 2); 405 } 406 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) && 407 (ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40)) { 408 ic_printf(ic, "%s MCS 40MHz SGI:\n", modestr); 409 ht_rateprint(ic, mode, 3); 410 } 411 } 412 413 void 414 ieee80211_ht_announce(struct ieee80211com *ic) 415 { 416 417 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA) || 418 isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) 419 ic_printf(ic, "%dT%dR\n", ic->ic_txstream, ic->ic_rxstream); 420 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA)) 421 ht_announce(ic, IEEE80211_MODE_11NA); 422 if (isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) 423 ht_announce(ic, IEEE80211_MODE_11NG); 424 } 425 426 void 427 ieee80211_init_suphtrates(struct ieee80211com *ic) 428 { 429 #define ADDRATE(x) do { \ 430 htrateset->rs_rates[htrateset->rs_nrates] = x; \ 431 htrateset->rs_nrates++; \ 432 } while (0) 433 struct ieee80211_htrateset *htrateset = &ic->ic_sup_htrates; 434 int i; 435 436 memset(htrateset, 0, sizeof(struct ieee80211_htrateset)); 437 for (i = 0; i < ic->ic_txstream * 8; i++) 438 ADDRATE(i); 439 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) && 440 (ic->ic_htcaps & IEEE80211_HTC_TXMCS32)) 441 ADDRATE(32); 442 if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL) { 443 if (ic->ic_txstream >= 2) { 444 for (i = 33; i <= 38; i++) 445 ADDRATE(i); 446 } 447 if (ic->ic_txstream >= 3) { 448 for (i = 39; i <= 52; i++) 449 ADDRATE(i); 450 } 451 if (ic->ic_txstream == 4) { 452 for (i = 53; i <= 76; i++) 453 ADDRATE(i); 454 } 455 } 456 #undef ADDRATE 457 } 458 459 /* 460 * Receive processing. 461 */ 462 463 /* 464 * Decap the encapsulated A-MSDU frames and dispatch all but 465 * the last for delivery. The last frame is returned for 466 * delivery via the normal path. 467 */ 468 struct mbuf * 469 ieee80211_decap_amsdu(struct ieee80211_node *ni, struct mbuf *m) 470 { 471 struct ieee80211vap *vap = ni->ni_vap; 472 int framelen; 473 struct mbuf *n; 474 475 /* discard 802.3 header inserted by ieee80211_decap */ 476 m_adj(m, sizeof(struct ether_header)); 477 478 vap->iv_stats.is_amsdu_decap++; 479 480 for (;;) { 481 /* 482 * Decap the first frame, bust it apart from the 483 * remainder and deliver. We leave the last frame 484 * delivery to the caller (for consistency with other 485 * code paths, could also do it here). 486 */ 487 m = ieee80211_decap1(m, &framelen); 488 if (m == NULL) { 489 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 490 ni->ni_macaddr, "a-msdu", "%s", "decap failed"); 491 vap->iv_stats.is_amsdu_tooshort++; 492 return NULL; 493 } 494 if (m->m_pkthdr.len == framelen) 495 break; 496 n = m_split(m, framelen, IEEE80211_M_NOWAIT); 497 if (n == NULL) { 498 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 499 ni->ni_macaddr, "a-msdu", 500 "%s", "unable to split encapsulated frames"); 501 vap->iv_stats.is_amsdu_split++; 502 m_freem(m); /* NB: must reclaim */ 503 return NULL; 504 } 505 vap->iv_deliver_data(vap, ni, m); 506 507 /* 508 * Remove frame contents; each intermediate frame 509 * is required to be aligned to a 4-byte boundary. 510 */ 511 m = n; 512 m_adj(m, roundup2(framelen, 4) - framelen); /* padding */ 513 } 514 return m; /* last delivered by caller */ 515 } 516 517 static void 518 ampdu_rx_purge_slot(struct ieee80211_rx_ampdu *rap, int i) 519 { 520 struct mbuf *m; 521 522 /* Walk the queue, removing frames as appropriate */ 523 for (;;) { 524 m = mbufq_dequeue(&rap->rxa_mq[i]); 525 if (m == NULL) 526 break; 527 rap->rxa_qbytes -= m->m_pkthdr.len; 528 rap->rxa_qframes--; 529 m_freem(m); 530 } 531 } 532 533 /* 534 * Add the given frame to the current RX reorder slot. 535 * 536 * For future offloaded A-MSDU handling where multiple frames with 537 * the same sequence number show up here, this routine will append 538 * those frames as long as they're appropriately tagged. 539 */ 540 static int 541 ampdu_rx_add_slot(struct ieee80211_rx_ampdu *rap, int off, int tid, 542 ieee80211_seq rxseq, 543 struct ieee80211_node *ni, 544 struct mbuf *m, 545 const struct ieee80211_rx_stats *rxs) 546 { 547 const struct ieee80211_rx_stats *rxs_final = NULL; 548 struct ieee80211vap *vap = ni->ni_vap; 549 int toss_dup; 550 #define PROCESS 0 /* caller should process frame */ 551 #define CONSUMED 1 /* frame consumed, caller does nothing */ 552 553 /* 554 * Figure out if this is a duplicate frame for the given slot. 555 * 556 * We're assuming that the driver will hand us all the frames 557 * for a given AMSDU decap pass and if we get /a/ frame 558 * for an AMSDU decap then we'll get all of them. 559 * 560 * The tricksy bit is that we don't know when the /end/ of 561 * the decap pass is, because we aren't tracking state here 562 * per-slot to know that we've finished receiving the frame list. 563 * 564 * The driver sets RX_F_AMSDU and RX_F_AMSDU_MORE to tell us 565 * what's going on; so ideally we'd just check the frame at the 566 * end of the reassembly slot to see if its F_AMSDU w/ no F_AMSDU_MORE - 567 * that means we've received the whole AMSDU decap pass. 568 */ 569 570 /* 571 * Get the rxs of the final mbuf in the slot, if one exists. 572 */ 573 if (!mbufq_empty(&rap->rxa_mq[off])) { 574 rxs_final = ieee80211_get_rx_params_ptr(mbufq_last(&rap->rxa_mq[off])); 575 } 576 577 /* Default to tossing the duplicate frame */ 578 toss_dup = 1; 579 580 /* 581 * Check to see if the final frame has F_AMSDU and F_AMSDU set, AND 582 * this frame has F_AMSDU set (MORE or otherwise.) That's a sign 583 * that more can come. 584 */ 585 586 if ((rxs != NULL) && (rxs_final != NULL) && 587 ieee80211_check_rxseq_amsdu(rxs) && 588 ieee80211_check_rxseq_amsdu(rxs_final)) { 589 if (! ieee80211_check_rxseq_amsdu_more(rxs_final)) { 590 /* 591 * amsdu_more() returning 0 means "it's not the 592 * final frame" so we can append more 593 * frames here. 594 */ 595 toss_dup = 0; 596 } 597 } 598 599 /* 600 * If the list is empty OR we have determined we can put more 601 * driver decap'ed AMSDU frames in here, then insert. 602 */ 603 if (mbufq_empty(&rap->rxa_mq[off]) || (toss_dup == 0)) { 604 if (mbufq_enqueue(&rap->rxa_mq[off], m) != 0) { 605 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, 606 ni->ni_macaddr, 607 "a-mpdu queue fail", 608 "seqno %u tid %u BA win <%u:%u> off=%d, qlen=%d, maxqlen=%d", 609 rxseq, tid, rap->rxa_start, 610 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 611 off, 612 mbufq_len(&rap->rxa_mq[off]), 613 rap->rxa_mq[off].mq_maxlen); 614 /* XXX error count */ 615 m_freem(m); 616 return CONSUMED; 617 } 618 rap->rxa_qframes++; 619 rap->rxa_qbytes += m->m_pkthdr.len; 620 vap->iv_stats.is_ampdu_rx_reorder++; 621 /* 622 * Statistics for AMSDU decap. 623 */ 624 if (rxs != NULL && ieee80211_check_rxseq_amsdu(rxs)) { 625 if (ieee80211_check_rxseq_amsdu_more(rxs)) { 626 /* more=1, AMSDU, end of batch */ 627 IEEE80211_NODE_STAT(ni, rx_amsdu_more_end); 628 } else { 629 IEEE80211_NODE_STAT(ni, rx_amsdu_more); 630 } 631 } 632 } else { 633 IEEE80211_DISCARD_MAC(vap, 634 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, 635 ni->ni_macaddr, "a-mpdu duplicate", 636 "seqno %u tid %u BA win <%u:%u>", 637 rxseq, tid, rap->rxa_start, 638 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1)); 639 if (rxs != NULL) { 640 IEEE80211_DISCARD_MAC(vap, 641 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, 642 ni->ni_macaddr, "a-mpdu duplicate", 643 "seqno %d tid %u pktflags 0x%08x\n", 644 rxseq, tid, rxs->c_pktflags); 645 } 646 if (rxs_final != NULL) { 647 IEEE80211_DISCARD_MAC(vap, 648 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, 649 ni->ni_macaddr, "a-mpdu duplicate", 650 "final: pktflags 0x%08x\n", 651 rxs_final->c_pktflags); 652 } 653 vap->iv_stats.is_rx_dup++; 654 IEEE80211_NODE_STAT(ni, rx_dup); 655 m_freem(m); 656 } 657 return CONSUMED; 658 #undef CONSUMED 659 #undef PROCESS 660 } 661 662 /* 663 * Purge all frames in the A-MPDU re-order queue. 664 */ 665 static void 666 ampdu_rx_purge(struct ieee80211_rx_ampdu *rap) 667 { 668 int i; 669 670 for (i = 0; i < rap->rxa_wnd; i++) { 671 ampdu_rx_purge_slot(rap, i); 672 if (rap->rxa_qframes == 0) 673 break; 674 } 675 KASSERT(rap->rxa_qbytes == 0 && rap->rxa_qframes == 0, 676 ("lost %u data, %u frames on ampdu rx q", 677 rap->rxa_qbytes, rap->rxa_qframes)); 678 } 679 680 static void 681 ieee80211_ampdu_rx_init_rap(struct ieee80211_node *ni, 682 struct ieee80211_rx_ampdu *rap) 683 { 684 int i; 685 686 /* XXX TODO: ensure the queues are empty */ 687 memset(rap, 0, sizeof(*rap)); 688 for (i = 0; i < IEEE80211_AGGR_BAWMAX; i++) 689 mbufq_init(&rap->rxa_mq[i], 256); 690 } 691 692 /* 693 * Start A-MPDU rx/re-order processing for the specified TID. 694 */ 695 static int 696 ampdu_rx_start(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap, 697 int baparamset, int batimeout, int baseqctl) 698 { 699 struct ieee80211vap *vap = ni->ni_vap; 700 int bufsiz = _IEEE80211_MASKSHIFT(baparamset, IEEE80211_BAPS_BUFSIZ); 701 702 if (rap->rxa_flags & IEEE80211_AGGR_RUNNING) { 703 /* 704 * AMPDU previously setup and not terminated with a DELBA, 705 * flush the reorder q's in case anything remains. 706 */ 707 ampdu_rx_purge(rap); 708 } 709 ieee80211_ampdu_rx_init_rap(ni, rap); 710 rap->rxa_wnd = (bufsiz == 0) ? 711 IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX); 712 rap->rxa_start = _IEEE80211_MASKSHIFT(baseqctl, IEEE80211_BASEQ_START); 713 rap->rxa_flags |= IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_XCHGPEND; 714 715 /* XXX this should be a configuration flag */ 716 if ((vap->iv_htcaps & IEEE80211_HTC_RX_AMSDU_AMPDU) && 717 (_IEEE80211_MASKSHIFT(baparamset, IEEE80211_BAPS_AMSDU))) 718 rap->rxa_flags |= IEEE80211_AGGR_AMSDU; 719 else 720 rap->rxa_flags &= ~IEEE80211_AGGR_AMSDU; 721 722 return 0; 723 } 724 725 /* 726 * Public function; manually setup the RX ampdu state. 727 */ 728 int 729 ieee80211_ampdu_rx_start_ext(struct ieee80211_node *ni, int tid, int seq, int baw) 730 { 731 struct ieee80211_rx_ampdu *rap; 732 733 /* XXX TODO: sanity check tid, seq, baw */ 734 735 rap = &ni->ni_rx_ampdu[tid]; 736 737 if (rap->rxa_flags & IEEE80211_AGGR_RUNNING) { 738 /* 739 * AMPDU previously setup and not terminated with a DELBA, 740 * flush the reorder q's in case anything remains. 741 */ 742 ampdu_rx_purge(rap); 743 } 744 745 ieee80211_ampdu_rx_init_rap(ni, rap); 746 747 rap->rxa_wnd = (baw== 0) ? 748 IEEE80211_AGGR_BAWMAX : min(baw, IEEE80211_AGGR_BAWMAX); 749 if (seq == -1) { 750 /* Wait for the first RX frame, use that as BAW */ 751 rap->rxa_start = 0; 752 rap->rxa_flags |= IEEE80211_AGGR_WAITRX; 753 } else { 754 rap->rxa_start = seq; 755 } 756 rap->rxa_flags |= IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_XCHGPEND; 757 758 /* XXX TODO: no amsdu flag */ 759 760 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, ni, 761 "%s: tid=%d, start=%d, wnd=%d, flags=0x%08x", 762 __func__, 763 tid, 764 seq, 765 rap->rxa_wnd, 766 rap->rxa_flags); 767 768 return 0; 769 } 770 771 /* 772 * Public function; manually stop the RX AMPDU state. 773 */ 774 void 775 ieee80211_ampdu_rx_stop_ext(struct ieee80211_node *ni, int tid) 776 { 777 struct ieee80211_rx_ampdu *rap; 778 779 /* XXX TODO: sanity check tid, seq, baw */ 780 rap = &ni->ni_rx_ampdu[tid]; 781 ampdu_rx_stop(ni, rap); 782 } 783 784 /* 785 * Stop A-MPDU rx processing for the specified TID. 786 */ 787 static void 788 ampdu_rx_stop(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap) 789 { 790 791 ampdu_rx_purge(rap); 792 rap->rxa_flags &= ~(IEEE80211_AGGR_RUNNING 793 | IEEE80211_AGGR_XCHGPEND 794 | IEEE80211_AGGR_WAITRX); 795 } 796 797 /* 798 * Dispatch a frame from the A-MPDU reorder queue. The 799 * frame is fed back into ieee80211_input marked with an 800 * M_AMPDU_MPDU flag so it doesn't come back to us (it also 801 * permits ieee80211_input to optimize re-processing). 802 */ 803 static __inline void 804 ampdu_dispatch(struct ieee80211_node *ni, struct mbuf *m) 805 { 806 m->m_flags |= M_AMPDU_MPDU; /* bypass normal processing */ 807 /* NB: rssi and noise are ignored w/ M_AMPDU_MPDU set */ 808 (void) ieee80211_input(ni, m, 0, 0); 809 } 810 811 static int 812 ampdu_dispatch_slot(struct ieee80211_rx_ampdu *rap, struct ieee80211_node *ni, 813 int i) 814 { 815 struct mbuf *m; 816 int n = 0; 817 818 for (;;) { 819 m = mbufq_dequeue(&rap->rxa_mq[i]); 820 if (m == NULL) 821 break; 822 n++; 823 824 rap->rxa_qbytes -= m->m_pkthdr.len; 825 rap->rxa_qframes--; 826 827 ampdu_dispatch(ni, m); 828 } 829 return (n); 830 } 831 832 static void 833 ampdu_rx_moveup(struct ieee80211_rx_ampdu *rap, struct ieee80211_node *ni, 834 int i, int winstart) 835 { 836 struct ieee80211vap *vap = ni->ni_vap; 837 838 /* 839 * If frames remain, copy the mbuf pointers down so 840 * they correspond to the offsets in the new window. 841 */ 842 if (rap->rxa_qframes != 0) { 843 int n = rap->rxa_qframes, j; 844 for (j = i+1; j < rap->rxa_wnd; j++) { 845 /* 846 * Concat the list contents over, which will 847 * blank the source list for us. 848 */ 849 if (mbufq_len(&rap->rxa_mq[j]) != 0) { 850 n = n - mbufq_len(&rap->rxa_mq[j]); 851 mbufq_concat(&rap->rxa_mq[j-i], &rap->rxa_mq[j]); 852 KASSERT(n >= 0, ("%s: n < 0 (%d)", __func__, n)); 853 if (n == 0) 854 break; 855 } 856 } 857 KASSERT(n == 0, ("%s: lost %d frames, qframes %d off %d " 858 "BA win <%d:%d> winstart %d", 859 __func__, n, rap->rxa_qframes, i, rap->rxa_start, 860 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 861 winstart)); 862 vap->iv_stats.is_ampdu_rx_copy += rap->rxa_qframes; 863 } 864 } 865 866 /* 867 * Dispatch as many frames as possible from the re-order queue. 868 * Frames will always be "at the front"; we process all frames 869 * up to the first empty slot in the window. On completion we 870 * cleanup state if there are still pending frames in the current 871 * BA window. We assume the frame at slot 0 is already handled 872 * by the caller; we always start at slot 1. 873 */ 874 static void 875 ampdu_rx_dispatch(struct ieee80211_rx_ampdu *rap, struct ieee80211_node *ni) 876 { 877 struct ieee80211vap *vap = ni->ni_vap; 878 int i, r, r2; 879 880 /* flush run of frames */ 881 r2 = 0; 882 for (i = 1; i < rap->rxa_wnd; i++) { 883 r = ampdu_dispatch_slot(rap, ni, i); 884 if (r == 0) 885 break; 886 r2 += r; 887 } 888 889 /* move up frames */ 890 ampdu_rx_moveup(rap, ni, i, -1); 891 892 /* 893 * Adjust the start of the BA window to 894 * reflect the frames just dispatched. 895 */ 896 rap->rxa_start = IEEE80211_SEQ_ADD(rap->rxa_start, i); 897 vap->iv_stats.is_ampdu_rx_oor += r2; 898 899 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, ni, 900 "%s: moved slot up %d slots to start at %d (%d frames)", 901 __func__, 902 i, 903 rap->rxa_start, 904 r2); 905 } 906 907 /* 908 * Dispatch all frames in the A-MPDU re-order queue. 909 */ 910 static void 911 ampdu_rx_flush(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap) 912 { 913 int i, r; 914 915 for (i = 0; i < rap->rxa_wnd; i++) { 916 r = ampdu_dispatch_slot(rap, ni, i); 917 if (r == 0) 918 continue; 919 ni->ni_vap->iv_stats.is_ampdu_rx_oor += r; 920 921 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, ni, 922 "%s: moved slot up %d slots to start at %d (%d frames)", 923 __func__, 924 1, 925 rap->rxa_start, 926 r); 927 928 if (rap->rxa_qframes == 0) 929 break; 930 } 931 } 932 933 /* 934 * Dispatch all frames in the A-MPDU re-order queue 935 * preceding the specified sequence number. This logic 936 * handles window moves due to a received MSDU or BAR. 937 */ 938 static void 939 ampdu_rx_flush_upto(struct ieee80211_node *ni, 940 struct ieee80211_rx_ampdu *rap, ieee80211_seq winstart) 941 { 942 struct ieee80211vap *vap = ni->ni_vap; 943 ieee80211_seq seqno; 944 int i, r; 945 946 /* 947 * Flush any complete MSDU's with a sequence number lower 948 * than winstart. Gaps may exist. Note that we may actually 949 * dispatch frames past winstart if a run continues; this is 950 * an optimization that avoids having to do a separate pass 951 * to dispatch frames after moving the BA window start. 952 */ 953 seqno = rap->rxa_start; 954 for (i = 0; i < rap->rxa_wnd; i++) { 955 if ((r = mbufq_len(&rap->rxa_mq[i])) != 0) { 956 (void) ampdu_dispatch_slot(rap, ni, i); 957 } else { 958 if (!IEEE80211_SEQ_BA_BEFORE(seqno, winstart)) 959 break; 960 } 961 vap->iv_stats.is_ampdu_rx_oor += r; 962 seqno = IEEE80211_SEQ_INC(seqno); 963 964 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, ni, 965 "%s: moved slot up %d slots to start at %d (%d frames)", 966 __func__, 967 1, 968 seqno, 969 r); 970 } 971 972 /* 973 * If frames remain, copy the mbuf pointers down so 974 * they correspond to the offsets in the new window. 975 */ 976 ampdu_rx_moveup(rap, ni, i, winstart); 977 978 /* 979 * Move the start of the BA window; we use the 980 * sequence number of the last MSDU that was 981 * passed up the stack+1 or winstart if stopped on 982 * a gap in the reorder buffer. 983 */ 984 rap->rxa_start = seqno; 985 } 986 987 /* 988 * Process a received QoS data frame for an HT station. Handle 989 * A-MPDU reordering: if this frame is received out of order 990 * and falls within the BA window hold onto it. Otherwise if 991 * this frame completes a run, flush any pending frames. We 992 * return 1 if the frame is consumed. A 0 is returned if 993 * the frame should be processed normally by the caller. 994 * 995 * A-MSDU: handle hardware decap'ed A-MSDU frames that are 996 * pretending to be MPDU's. They're dispatched directly if 997 * able; or attempted to put into the receive reordering slot. 998 */ 999 int 1000 ieee80211_ampdu_reorder(struct ieee80211_node *ni, struct mbuf *m, 1001 const struct ieee80211_rx_stats *rxs) 1002 { 1003 #define PROCESS 0 /* caller should process frame */ 1004 #define CONSUMED 1 /* frame consumed, caller does nothing */ 1005 struct ieee80211vap *vap = ni->ni_vap; 1006 struct ieee80211_qosframe *wh; 1007 struct ieee80211_rx_ampdu *rap; 1008 ieee80211_seq rxseq; 1009 uint8_t tid; 1010 int off; 1011 int amsdu = ieee80211_check_rxseq_amsdu(rxs); 1012 int amsdu_end = ieee80211_check_rxseq_amsdu_more(rxs); 1013 1014 KASSERT((m->m_flags & (M_AMPDU | M_AMPDU_MPDU)) == M_AMPDU, 1015 ("!a-mpdu or already re-ordered, flags 0x%x", m->m_flags)); 1016 KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT sta")); 1017 1018 /* NB: m_len known to be sufficient */ 1019 wh = mtod(m, struct ieee80211_qosframe *); 1020 if (!IEEE80211_IS_QOSDATA(wh)) { 1021 /* 1022 * Not QoS data, shouldn't get here but just 1023 * return it to the caller for processing. 1024 */ 1025 return PROCESS; 1026 } 1027 1028 /* 1029 * 802.11-2012 9.3.2.10 - Duplicate detection and recovery. 1030 * 1031 * Multicast QoS data frames are checked against a different 1032 * counter, not the per-TID counter. 1033 */ 1034 if (IEEE80211_IS_MULTICAST(wh->i_addr1)) 1035 return PROCESS; 1036 1037 tid = ieee80211_getqos(wh)[0]; 1038 tid &= IEEE80211_QOS_TID; 1039 rap = &ni->ni_rx_ampdu[tid]; 1040 if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) { 1041 /* 1042 * No ADDBA request yet, don't touch. 1043 */ 1044 return PROCESS; 1045 } 1046 rxseq = le16toh(*(uint16_t *)wh->i_seq); 1047 if ((rxseq & IEEE80211_SEQ_FRAG_MASK) != 0) { 1048 /* 1049 * Fragments are not allowed; toss. 1050 */ 1051 IEEE80211_DISCARD_MAC(vap, 1052 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr, 1053 "A-MPDU", "fragment, rxseq 0x%x tid %u%s", rxseq, tid, 1054 wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : ""); 1055 vap->iv_stats.is_ampdu_rx_drop++; 1056 IEEE80211_NODE_STAT(ni, rx_drop); 1057 m_freem(m); 1058 return CONSUMED; 1059 } 1060 rxseq >>= IEEE80211_SEQ_SEQ_SHIFT; 1061 rap->rxa_nframes++; 1062 1063 /* 1064 * Handle waiting for the first frame to define the BAW. 1065 * Some firmware doesn't provide the RX of the starting point 1066 * of the BAW and we have to cope. 1067 */ 1068 if (rap->rxa_flags & IEEE80211_AGGR_WAITRX) { 1069 rap->rxa_flags &= ~IEEE80211_AGGR_WAITRX; 1070 rap->rxa_start = rxseq; 1071 } 1072 again: 1073 if (rxseq == rap->rxa_start) { 1074 /* 1075 * First frame in window. 1076 */ 1077 if (rap->rxa_qframes != 0) { 1078 /* 1079 * Dispatch as many packets as we can. 1080 */ 1081 KASSERT(mbufq_empty(&rap->rxa_mq[0]), ("unexpected dup")); 1082 ampdu_dispatch(ni, m); 1083 ampdu_rx_dispatch(rap, ni); 1084 return CONSUMED; 1085 } else { 1086 /* 1087 * In order; advance window if needed and notify 1088 * caller to dispatch directly. 1089 */ 1090 if (amsdu) { 1091 if (amsdu_end) { 1092 rap->rxa_start = IEEE80211_SEQ_INC(rxseq); 1093 IEEE80211_NODE_STAT(ni, rx_amsdu_more_end); 1094 } else { 1095 IEEE80211_NODE_STAT(ni, rx_amsdu_more); 1096 } 1097 } else { 1098 rap->rxa_start = IEEE80211_SEQ_INC(rxseq); 1099 } 1100 return PROCESS; 1101 } 1102 } 1103 /* 1104 * Frame is out of order; store if in the BA window. 1105 */ 1106 /* calculate offset in BA window */ 1107 off = IEEE80211_SEQ_SUB(rxseq, rap->rxa_start); 1108 if (off < rap->rxa_wnd) { 1109 /* 1110 * Common case (hopefully): in the BA window. 1111 * Sec 9.10.7.6.2 a) (p.137) 1112 */ 1113 1114 /* 1115 * Check for frames sitting too long in the reorder queue. 1116 * This should only ever happen if frames are not delivered 1117 * without the sender otherwise notifying us (e.g. with a 1118 * BAR to move the window). Typically this happens because 1119 * of vendor bugs that cause the sequence number to jump. 1120 * When this happens we get a gap in the reorder queue that 1121 * leaves frame sitting on the queue until they get pushed 1122 * out due to window moves. When the vendor does not send 1123 * BAR this move only happens due to explicit packet sends 1124 * 1125 * NB: we only track the time of the oldest frame in the 1126 * reorder q; this means that if we flush we might push 1127 * frames that still "new"; if this happens then subsequent 1128 * frames will result in BA window moves which cost something 1129 * but is still better than a big throughput dip. 1130 */ 1131 if (rap->rxa_qframes != 0) { 1132 /* XXX honor batimeout? */ 1133 if (ieee80211_time_after(ticks - rap->rxa_age, 1134 ieee80211_ampdu_age)) { 1135 /* 1136 * Too long since we received the first 1137 * frame; flush the reorder buffer. 1138 */ 1139 if (rap->rxa_qframes != 0) { 1140 vap->iv_stats.is_ampdu_rx_age += 1141 rap->rxa_qframes; 1142 ampdu_rx_flush(ni, rap); 1143 } 1144 /* 1145 * Advance the window if needed and notify 1146 * the caller to dispatch directly. 1147 */ 1148 if (amsdu) { 1149 if (amsdu_end) { 1150 rap->rxa_start = 1151 IEEE80211_SEQ_INC(rxseq); 1152 IEEE80211_NODE_STAT(ni, 1153 rx_amsdu_more_end); 1154 } else { 1155 IEEE80211_NODE_STAT(ni, 1156 rx_amsdu_more); 1157 } 1158 } else { 1159 rap->rxa_start = 1160 IEEE80211_SEQ_INC(rxseq); 1161 } 1162 return PROCESS; 1163 } 1164 } else { 1165 /* 1166 * First frame, start aging timer. 1167 */ 1168 rap->rxa_age = ticks; 1169 } 1170 1171 /* save packet - this consumes, no matter what */ 1172 ampdu_rx_add_slot(rap, off, tid, rxseq, ni, m, rxs); 1173 return CONSUMED; 1174 } 1175 if (off < IEEE80211_SEQ_BA_RANGE) { 1176 /* 1177 * Outside the BA window, but within range; 1178 * flush the reorder q and move the window. 1179 * Sec 9.10.7.6.2 b) (p.138) 1180 */ 1181 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni, 1182 "move BA win <%u:%u> (%u frames) rxseq %u tid %u", 1183 rap->rxa_start, 1184 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 1185 rap->rxa_qframes, rxseq, tid); 1186 vap->iv_stats.is_ampdu_rx_move++; 1187 1188 /* 1189 * The spec says to flush frames up to but not including: 1190 * WinStart_B = rxseq - rap->rxa_wnd + 1 1191 * Then insert the frame or notify the caller to process 1192 * it immediately. We can safely do this by just starting 1193 * over again because we know the frame will now be within 1194 * the BA window. 1195 */ 1196 /* NB: rxa_wnd known to be >0 */ 1197 ampdu_rx_flush_upto(ni, rap, 1198 IEEE80211_SEQ_SUB(rxseq, rap->rxa_wnd-1)); 1199 goto again; 1200 } else { 1201 /* 1202 * Outside the BA window and out of range; toss. 1203 * Sec 9.10.7.6.2 c) (p.138) 1204 */ 1205 IEEE80211_DISCARD_MAC(vap, 1206 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr, 1207 "MPDU", "BA win <%u:%u> (%u frames) rxseq %u tid %u%s", 1208 rap->rxa_start, 1209 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 1210 rap->rxa_qframes, rxseq, tid, 1211 wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : ""); 1212 vap->iv_stats.is_ampdu_rx_drop++; 1213 IEEE80211_NODE_STAT(ni, rx_drop); 1214 m_freem(m); 1215 return CONSUMED; 1216 } 1217 #undef CONSUMED 1218 #undef PROCESS 1219 } 1220 1221 /* 1222 * Process a BAR ctl frame. Dispatch all frames up to 1223 * the sequence number of the frame. If this frame is 1224 * out of range it's discarded. 1225 */ 1226 void 1227 ieee80211_recv_bar(struct ieee80211_node *ni, struct mbuf *m0) 1228 { 1229 struct ieee80211vap *vap = ni->ni_vap; 1230 struct ieee80211_frame_bar *wh; 1231 struct ieee80211_rx_ampdu *rap; 1232 ieee80211_seq rxseq; 1233 int tid, off; 1234 1235 if (!ieee80211_recv_bar_ena) { 1236 #if 0 1237 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_11N, 1238 ni->ni_macaddr, "BAR", "%s", "processing disabled"); 1239 #endif 1240 vap->iv_stats.is_ampdu_bar_bad++; 1241 return; 1242 } 1243 wh = mtod(m0, struct ieee80211_frame_bar *); 1244 /* XXX check basic BAR */ 1245 tid = _IEEE80211_MASKSHIFT(le16toh(wh->i_ctl), IEEE80211_BAR_TID); 1246 rap = &ni->ni_rx_ampdu[tid]; 1247 if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) { 1248 /* 1249 * No ADDBA request yet, don't touch. 1250 */ 1251 IEEE80211_DISCARD_MAC(vap, 1252 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, 1253 ni->ni_macaddr, "BAR", "no BA stream, tid %u", tid); 1254 vap->iv_stats.is_ampdu_bar_bad++; 1255 return; 1256 } 1257 vap->iv_stats.is_ampdu_bar_rx++; 1258 rxseq = le16toh(wh->i_seq) >> IEEE80211_SEQ_SEQ_SHIFT; 1259 if (rxseq == rap->rxa_start) 1260 return; 1261 /* calculate offset in BA window */ 1262 off = IEEE80211_SEQ_SUB(rxseq, rap->rxa_start); 1263 if (off < IEEE80211_SEQ_BA_RANGE) { 1264 /* 1265 * Flush the reorder q up to rxseq and move the window. 1266 * Sec 9.10.7.6.3 a) (p.138) 1267 */ 1268 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni, 1269 "BAR moves BA win <%u:%u> (%u frames) rxseq %u tid %u", 1270 rap->rxa_start, 1271 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 1272 rap->rxa_qframes, rxseq, tid); 1273 vap->iv_stats.is_ampdu_bar_move++; 1274 1275 ampdu_rx_flush_upto(ni, rap, rxseq); 1276 if (off >= rap->rxa_wnd) { 1277 /* 1278 * BAR specifies a window start to the right of BA 1279 * window; we must move it explicitly since 1280 * ampdu_rx_flush_upto will not. 1281 */ 1282 rap->rxa_start = rxseq; 1283 } 1284 } else { 1285 /* 1286 * Out of range; toss. 1287 * Sec 9.10.7.6.3 b) (p.138) 1288 */ 1289 IEEE80211_DISCARD_MAC(vap, 1290 IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr, 1291 "BAR", "BA win <%u:%u> (%u frames) rxseq %u tid %u%s", 1292 rap->rxa_start, 1293 IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 1294 rap->rxa_qframes, rxseq, tid, 1295 wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : ""); 1296 vap->iv_stats.is_ampdu_bar_oow++; 1297 IEEE80211_NODE_STAT(ni, rx_drop); 1298 } 1299 } 1300 1301 /* 1302 * Setup HT-specific state in a node. Called only 1303 * when HT use is negotiated so we don't do extra 1304 * work for temporary and/or legacy sta's. 1305 */ 1306 void 1307 ieee80211_ht_node_init(struct ieee80211_node *ni) 1308 { 1309 struct ieee80211_tx_ampdu *tap; 1310 int tid; 1311 1312 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 1313 ni, 1314 "%s: called (%p)", 1315 __func__, 1316 ni); 1317 1318 if (ni->ni_flags & IEEE80211_NODE_HT) { 1319 /* 1320 * Clean AMPDU state on re-associate. This handles the case 1321 * where a station leaves w/o notifying us and then returns 1322 * before node is reaped for inactivity. 1323 */ 1324 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 1325 ni, 1326 "%s: calling cleanup (%p)", 1327 __func__, ni); 1328 ieee80211_ht_node_cleanup(ni); 1329 } 1330 for (tid = 0; tid < WME_NUM_TID; tid++) { 1331 tap = &ni->ni_tx_ampdu[tid]; 1332 tap->txa_tid = tid; 1333 tap->txa_ni = ni; 1334 ieee80211_txampdu_init_pps(tap); 1335 /* NB: further initialization deferred */ 1336 ieee80211_ampdu_rx_init_rap(ni, &ni->ni_rx_ampdu[tid]); 1337 } 1338 ni->ni_flags |= IEEE80211_NODE_HT | IEEE80211_NODE_AMPDU | 1339 IEEE80211_NODE_AMSDU; 1340 } 1341 1342 /* 1343 * Cleanup HT-specific state in a node. Called only 1344 * when HT use has been marked. 1345 */ 1346 void 1347 ieee80211_ht_node_cleanup(struct ieee80211_node *ni) 1348 { 1349 struct ieee80211com *ic = ni->ni_ic; 1350 int i; 1351 1352 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 1353 ni, 1354 "%s: called (%p)", 1355 __func__, ni); 1356 1357 KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT node")); 1358 1359 /* XXX optimize this */ 1360 for (i = 0; i < WME_NUM_TID; i++) { 1361 struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[i]; 1362 if (tap->txa_flags & IEEE80211_AGGR_SETUP) 1363 ampdu_tx_stop(tap); 1364 } 1365 for (i = 0; i < WME_NUM_TID; i++) 1366 ic->ic_ampdu_rx_stop(ni, &ni->ni_rx_ampdu[i]); 1367 1368 ni->ni_htcap = 0; 1369 ni->ni_flags &= ~IEEE80211_NODE_HT_ALL; 1370 } 1371 1372 /* 1373 * Age out HT resources for a station. 1374 */ 1375 void 1376 ieee80211_ht_node_age(struct ieee80211_node *ni) 1377 { 1378 struct ieee80211vap *vap = ni->ni_vap; 1379 uint8_t tid; 1380 1381 KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT sta")); 1382 1383 for (tid = 0; tid < WME_NUM_TID; tid++) { 1384 struct ieee80211_rx_ampdu *rap; 1385 1386 rap = &ni->ni_rx_ampdu[tid]; 1387 if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) 1388 continue; 1389 if (rap->rxa_qframes == 0) 1390 continue; 1391 /* 1392 * Check for frames sitting too long in the reorder queue. 1393 * See above for more details on what's happening here. 1394 */ 1395 /* XXX honor batimeout? */ 1396 if (ieee80211_time_after(ticks - rap->rxa_age, 1397 ieee80211_ampdu_age)) { 1398 /* 1399 * Too long since we received the first 1400 * frame; flush the reorder buffer. 1401 */ 1402 vap->iv_stats.is_ampdu_rx_age += rap->rxa_qframes; 1403 ampdu_rx_flush(ni, rap); 1404 } 1405 } 1406 } 1407 1408 static struct ieee80211_channel * 1409 findhtchan(struct ieee80211com *ic, struct ieee80211_channel *c, int htflags) 1410 { 1411 return ieee80211_find_channel(ic, c->ic_freq, 1412 (c->ic_flags &~ IEEE80211_CHAN_HT) | htflags); 1413 } 1414 1415 /* 1416 * Adjust a channel to be HT/non-HT according to the vap's configuration. 1417 */ 1418 struct ieee80211_channel * 1419 ieee80211_ht_adjust_channel(struct ieee80211com *ic, 1420 struct ieee80211_channel *chan, int flags) 1421 { 1422 struct ieee80211_channel *c; 1423 1424 if (flags & IEEE80211_FHT_HT) { 1425 /* promote to HT if possible */ 1426 if (flags & IEEE80211_FHT_USEHT40) { 1427 if (!IEEE80211_IS_CHAN_HT40(chan)) { 1428 /* NB: arbitrarily pick ht40+ over ht40- */ 1429 c = findhtchan(ic, chan, IEEE80211_CHAN_HT40U); 1430 if (c == NULL) 1431 c = findhtchan(ic, chan, 1432 IEEE80211_CHAN_HT40D); 1433 if (c == NULL) 1434 c = findhtchan(ic, chan, 1435 IEEE80211_CHAN_HT20); 1436 if (c != NULL) 1437 chan = c; 1438 } 1439 } else if (!IEEE80211_IS_CHAN_HT20(chan)) { 1440 c = findhtchan(ic, chan, IEEE80211_CHAN_HT20); 1441 if (c != NULL) 1442 chan = c; 1443 } 1444 } else if (IEEE80211_IS_CHAN_HT(chan)) { 1445 /* demote to legacy, HT use is disabled */ 1446 c = ieee80211_find_channel(ic, chan->ic_freq, 1447 chan->ic_flags &~ IEEE80211_CHAN_HT); 1448 if (c != NULL) 1449 chan = c; 1450 } 1451 return chan; 1452 } 1453 1454 /* 1455 * Setup HT-specific state for a legacy WDS peer. 1456 */ 1457 void 1458 ieee80211_ht_wds_init(struct ieee80211_node *ni) 1459 { 1460 struct ieee80211vap *vap = ni->ni_vap; 1461 struct ieee80211_tx_ampdu *tap; 1462 int tid; 1463 1464 KASSERT(vap->iv_flags_ht & IEEE80211_FHT_HT, ("no HT requested")); 1465 1466 /* XXX check scan cache in case peer has an ap and we have info */ 1467 /* 1468 * If setup with a legacy channel; locate an HT channel. 1469 * Otherwise if the inherited channel (from a companion 1470 * AP) is suitable use it so we use the same location 1471 * for the extension channel). 1472 */ 1473 ni->ni_chan = ieee80211_ht_adjust_channel(ni->ni_ic, 1474 ni->ni_chan, ieee80211_htchanflags(ni->ni_chan)); 1475 1476 ni->ni_htcap = 0; 1477 if (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20) 1478 ni->ni_htcap |= IEEE80211_HTCAP_SHORTGI20; 1479 if (IEEE80211_IS_CHAN_HT40(ni->ni_chan)) { 1480 ni->ni_htcap |= IEEE80211_HTCAP_CHWIDTH40; 1481 ni->ni_chw = NET80211_STA_RX_BW_40; 1482 if (IEEE80211_IS_CHAN_HT40U(ni->ni_chan)) 1483 ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_ABOVE; 1484 else if (IEEE80211_IS_CHAN_HT40D(ni->ni_chan)) 1485 ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_BELOW; 1486 if (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40) 1487 ni->ni_htcap |= IEEE80211_HTCAP_SHORTGI40; 1488 } else { 1489 ni->ni_chw = NET80211_STA_RX_BW_20; 1490 ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_NONE; 1491 } 1492 ni->ni_htctlchan = ni->ni_chan->ic_ieee; 1493 if (vap->iv_flags_ht & IEEE80211_FHT_RIFS) 1494 ni->ni_flags |= IEEE80211_NODE_RIFS; 1495 /* XXX does it make sense to enable SMPS? */ 1496 1497 ni->ni_htopmode = 0; /* XXX need protection state */ 1498 ni->ni_htstbc = 0; /* XXX need info */ 1499 1500 for (tid = 0; tid < WME_NUM_TID; tid++) { 1501 tap = &ni->ni_tx_ampdu[tid]; 1502 tap->txa_tid = tid; 1503 ieee80211_txampdu_init_pps(tap); 1504 } 1505 /* NB: AMPDU tx/rx governed by IEEE80211_FHT_AMPDU_{TX,RX} */ 1506 ni->ni_flags |= IEEE80211_NODE_HT | IEEE80211_NODE_AMPDU | 1507 IEEE80211_NODE_AMSDU; 1508 } 1509 1510 /* 1511 * Notify a VAP of a change in the HTINFO ie if it's a hostap VAP. 1512 * 1513 * This is to be called from the deferred HT protection update 1514 * task once the flags are updated. 1515 */ 1516 void 1517 ieee80211_htinfo_notify(struct ieee80211vap *vap) 1518 { 1519 1520 IEEE80211_LOCK_ASSERT(vap->iv_ic); 1521 1522 if (vap->iv_opmode != IEEE80211_M_HOSTAP) 1523 return; 1524 if (vap->iv_state != IEEE80211_S_RUN || 1525 !IEEE80211_IS_CHAN_HT(vap->iv_bss->ni_chan)) 1526 return; 1527 1528 IEEE80211_NOTE(vap, 1529 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, 1530 vap->iv_bss, 1531 "HT bss occupancy change: %d sta, %d ht, " 1532 "%d ht40%s, HT protmode now 0x%x" 1533 , vap->iv_sta_assoc 1534 , vap->iv_ht_sta_assoc 1535 , vap->iv_ht40_sta_assoc 1536 , (vap->iv_flags_ht & IEEE80211_FHT_NONHT_PR) ? 1537 ", non-HT sta present" : "" 1538 , vap->iv_curhtprotmode); 1539 1540 ieee80211_beacon_notify(vap, IEEE80211_BEACON_HTINFO); 1541 } 1542 1543 /* 1544 * Calculate HT protection mode from current 1545 * state and handle updates. 1546 */ 1547 static void 1548 htinfo_update(struct ieee80211vap *vap) 1549 { 1550 struct ieee80211com *ic = vap->iv_ic; 1551 uint8_t protmode; 1552 1553 if (vap->iv_sta_assoc != vap->iv_ht_sta_assoc) { 1554 protmode = IEEE80211_HTINFO_OPMODE_MIXED 1555 | IEEE80211_HTINFO_NONHT_PRESENT; 1556 } else if (vap->iv_flags_ht & IEEE80211_FHT_NONHT_PR) { 1557 protmode = IEEE80211_HTINFO_OPMODE_PROTOPT 1558 | IEEE80211_HTINFO_NONHT_PRESENT; 1559 } else if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && 1560 IEEE80211_IS_CHAN_HT40(ic->ic_bsschan) && 1561 vap->iv_sta_assoc != vap->iv_ht40_sta_assoc) { 1562 protmode = IEEE80211_HTINFO_OPMODE_HT20PR; 1563 } else { 1564 protmode = IEEE80211_HTINFO_OPMODE_PURE; 1565 } 1566 if (protmode != vap->iv_curhtprotmode) { 1567 vap->iv_curhtprotmode = protmode; 1568 /* Update VAP with new protection mode */ 1569 ieee80211_vap_update_ht_protmode(vap); 1570 } 1571 } 1572 1573 /* 1574 * Handle an HT station joining a BSS. 1575 */ 1576 void 1577 ieee80211_ht_node_join(struct ieee80211_node *ni) 1578 { 1579 struct ieee80211vap *vap = ni->ni_vap; 1580 1581 IEEE80211_LOCK_ASSERT(vap->iv_ic); 1582 1583 if (ni->ni_flags & IEEE80211_NODE_HT) { 1584 vap->iv_ht_sta_assoc++; 1585 if (ni->ni_chw == NET80211_STA_RX_BW_40) 1586 vap->iv_ht40_sta_assoc++; 1587 } 1588 htinfo_update(vap); 1589 } 1590 1591 /* 1592 * Handle an HT station leaving a BSS. 1593 */ 1594 void 1595 ieee80211_ht_node_leave(struct ieee80211_node *ni) 1596 { 1597 struct ieee80211vap *vap = ni->ni_vap; 1598 1599 IEEE80211_LOCK_ASSERT(vap->iv_ic); 1600 1601 if (ni->ni_flags & IEEE80211_NODE_HT) { 1602 vap->iv_ht_sta_assoc--; 1603 if (ni->ni_chw == NET80211_STA_RX_BW_40) 1604 vap->iv_ht40_sta_assoc--; 1605 } 1606 htinfo_update(vap); 1607 } 1608 1609 /* 1610 * Public version of htinfo_update; used for processing 1611 * beacon frames from overlapping bss. 1612 * 1613 * Caller can specify either IEEE80211_HTINFO_OPMODE_MIXED 1614 * (on receipt of a beacon that advertises MIXED) or 1615 * IEEE80211_HTINFO_OPMODE_PROTOPT (on receipt of a beacon 1616 * from an overlapping legacy bss). We treat MIXED with 1617 * a higher precedence than PROTOPT (i.e. we will not change 1618 * change PROTOPT -> MIXED; only MIXED -> PROTOPT). This 1619 * corresponds to how we handle things in htinfo_update. 1620 * 1621 */ 1622 void 1623 ieee80211_htprot_update(struct ieee80211vap *vap, int protmode) 1624 { 1625 struct ieee80211com *ic = vap->iv_ic; 1626 #define OPMODE(x) _IEEE80211_SHIFTMASK(x, IEEE80211_HTINFO_OPMODE) 1627 IEEE80211_LOCK(ic); 1628 1629 /* track non-HT station presence */ 1630 KASSERT(protmode & IEEE80211_HTINFO_NONHT_PRESENT, 1631 ("protmode 0x%x", protmode)); 1632 vap->iv_flags_ht |= IEEE80211_FHT_NONHT_PR; 1633 vap->iv_lastnonht = ticks; 1634 1635 if (protmode != vap->iv_curhtprotmode && 1636 (OPMODE(vap->iv_curhtprotmode) != IEEE80211_HTINFO_OPMODE_MIXED || 1637 OPMODE(protmode) == IEEE80211_HTINFO_OPMODE_PROTOPT)) { 1638 vap->iv_curhtprotmode = protmode; 1639 /* Update VAP with new protection mode */ 1640 ieee80211_vap_update_ht_protmode(vap); 1641 } 1642 IEEE80211_UNLOCK(ic); 1643 #undef OPMODE 1644 } 1645 1646 /* 1647 * Time out presence of an overlapping bss with non-HT 1648 * stations. When operating in hostap mode we listen for 1649 * beacons from other stations and if we identify a non-HT 1650 * station is present we update the opmode field of the 1651 * HTINFO ie. To identify when all non-HT stations are 1652 * gone we time out this condition. 1653 */ 1654 void 1655 ieee80211_ht_timeout(struct ieee80211vap *vap) 1656 { 1657 1658 IEEE80211_LOCK_ASSERT(vap->iv_ic); 1659 1660 if ((vap->iv_flags_ht & IEEE80211_FHT_NONHT_PR) && 1661 ieee80211_time_after(ticks, vap->iv_lastnonht + IEEE80211_NONHT_PRESENT_AGE)) { 1662 IEEE80211_DPRINTF(vap, IEEE80211_MSG_11N, 1663 "%s", "time out non-HT STA present on channel"); 1664 vap->iv_flags_ht &= ~IEEE80211_FHT_NONHT_PR; 1665 htinfo_update(vap); 1666 } 1667 } 1668 1669 /* 1670 * Process an 802.11n HT capabilities ie. 1671 */ 1672 void 1673 ieee80211_parse_htcap(struct ieee80211_node *ni, const uint8_t *ie) 1674 { 1675 if (ie[0] == IEEE80211_ELEMID_VENDOR) { 1676 /* 1677 * Station used Vendor OUI ie to associate; 1678 * mark the node so when we respond we'll use 1679 * the Vendor OUI's and not the standard ie's. 1680 */ 1681 ni->ni_flags |= IEEE80211_NODE_HTCOMPAT; 1682 ie += 4; 1683 } else 1684 ni->ni_flags &= ~IEEE80211_NODE_HTCOMPAT; 1685 1686 ni->ni_htcap = le16dec(ie + 1687 __offsetof(struct ieee80211_ie_htcap, hc_cap)); 1688 ni->ni_htparam = ie[__offsetof(struct ieee80211_ie_htcap, hc_param)]; 1689 } 1690 1691 static void 1692 htinfo_parse(struct ieee80211_node *ni, 1693 const struct ieee80211_ie_htinfo *htinfo) 1694 { 1695 uint16_t w; 1696 1697 ni->ni_htctlchan = htinfo->hi_ctrlchannel; 1698 ni->ni_ht2ndchan = _IEEE80211_SHIFTMASK(htinfo->hi_byte1, 1699 IEEE80211_HTINFO_2NDCHAN); 1700 w = le16dec(&htinfo->hi_byte2); 1701 ni->ni_htopmode = _IEEE80211_SHIFTMASK(w, IEEE80211_HTINFO_OPMODE); 1702 w = le16dec(&htinfo->hi_byte45); 1703 ni->ni_htstbc = _IEEE80211_SHIFTMASK(w, IEEE80211_HTINFO_BASIC_STBCMCS); 1704 } 1705 1706 /* 1707 * Parse an 802.11n HT info ie and save useful information 1708 * to the node state. Note this does not effect any state 1709 * changes such as for channel width change. 1710 */ 1711 void 1712 ieee80211_parse_htinfo(struct ieee80211_node *ni, const uint8_t *ie) 1713 { 1714 if (ie[0] == IEEE80211_ELEMID_VENDOR) 1715 ie += 4; 1716 htinfo_parse(ni, (const struct ieee80211_ie_htinfo *) ie); 1717 } 1718 1719 /* 1720 * Handle 11n/11ac channel switch. 1721 * 1722 * Use the received HT/VHT ie's to identify the right channel to use. 1723 * If we cannot locate it in the channel table then fallback to 1724 * legacy operation. 1725 * 1726 * Note that we use this information to identify the node's 1727 * channel only; the caller is responsible for insuring any 1728 * required channel change is done (e.g. in sta mode when 1729 * parsing the contents of a beacon frame). 1730 */ 1731 static int 1732 htinfo_update_chw(struct ieee80211_node *ni, int htflags, int vhtflags) 1733 { 1734 struct ieee80211com *ic = ni->ni_ic; 1735 struct ieee80211_channel *c; 1736 int chanflags; 1737 int ret = 0; 1738 1739 /* 1740 * First step - do HT/VHT only channel lookup based on operating mode 1741 * flags. This involves masking out the VHT flags as well. 1742 * Otherwise we end up doing the full channel walk each time 1743 * we trigger this, which is expensive. 1744 */ 1745 chanflags = (ni->ni_chan->ic_flags &~ 1746 (IEEE80211_CHAN_HT | IEEE80211_CHAN_VHT)) | htflags | vhtflags; 1747 1748 if (chanflags == ni->ni_chan->ic_flags) 1749 goto done; 1750 1751 /* 1752 * If HT /or/ VHT flags have changed then check both. 1753 * We need to start by picking a HT channel anyway. 1754 */ 1755 1756 c = NULL; 1757 chanflags = (ni->ni_chan->ic_flags &~ 1758 (IEEE80211_CHAN_HT | IEEE80211_CHAN_VHT)) | htflags; 1759 /* XXX not right for ht40- */ 1760 c = ieee80211_find_channel(ic, ni->ni_chan->ic_freq, chanflags); 1761 if (c == NULL && (htflags & IEEE80211_CHAN_HT40)) { 1762 /* 1763 * No HT40 channel entry in our table; fall back 1764 * to HT20 operation. This should not happen. 1765 */ 1766 c = findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT20); 1767 #if 0 1768 IEEE80211_NOTE(ni->ni_vap, 1769 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni, 1770 "no HT40 channel (freq %u), falling back to HT20", 1771 ni->ni_chan->ic_freq); 1772 #endif 1773 /* XXX stat */ 1774 } 1775 1776 /* Nothing found - leave it alone; move onto VHT */ 1777 if (c == NULL) 1778 c = ni->ni_chan; 1779 1780 /* 1781 * If it's non-HT, then bail out now. 1782 */ 1783 if (! IEEE80211_IS_CHAN_HT(c)) { 1784 IEEE80211_NOTE(ni->ni_vap, 1785 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni, 1786 "not HT; skipping VHT check (%u/0x%x)", 1787 c->ic_freq, c->ic_flags); 1788 goto done; 1789 } 1790 1791 /* 1792 * Next step - look at the current VHT flags and determine 1793 * if we need to upgrade. Mask out the VHT and HT flags since 1794 * the vhtflags field will already have the correct HT 1795 * flags to use. 1796 */ 1797 if (IEEE80211_CONF_VHT(ic) && ni->ni_vhtcap != 0 && vhtflags != 0) { 1798 chanflags = (c->ic_flags 1799 &~ (IEEE80211_CHAN_HT | IEEE80211_CHAN_VHT)) 1800 | vhtflags; 1801 IEEE80211_NOTE(ni->ni_vap, 1802 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, 1803 ni, 1804 "%s: VHT; chanwidth=0x%02x; vhtflags=0x%08x", 1805 __func__, ni->ni_vht_chanwidth, vhtflags); 1806 1807 IEEE80211_NOTE(ni->ni_vap, 1808 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, 1809 ni, 1810 "%s: VHT; trying lookup for %d/0x%08x", 1811 __func__, c->ic_freq, chanflags); 1812 c = ieee80211_find_channel(ic, c->ic_freq, chanflags); 1813 } 1814 1815 /* Finally, if it's changed */ 1816 if (c != NULL && c != ni->ni_chan) { 1817 IEEE80211_NOTE(ni->ni_vap, 1818 IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni, 1819 "switch station to %s%d channel %u/0x%x", 1820 IEEE80211_IS_CHAN_VHT(c) ? "VHT" : "HT", 1821 IEEE80211_IS_CHAN_VHT80(c) ? 80 : 1822 (IEEE80211_IS_CHAN_HT40(c) ? 40 : 20), 1823 c->ic_freq, c->ic_flags); 1824 ni->ni_chan = c; 1825 ret = 1; 1826 } 1827 /* NB: caller responsible for forcing any channel change */ 1828 1829 done: 1830 /* update node's (11n) tx channel width */ 1831 ni->ni_chw = IEEE80211_IS_CHAN_HT40(ni->ni_chan) ? 1832 NET80211_STA_RX_BW_40 : NET80211_STA_RX_BW_20; 1833 return (ret); 1834 } 1835 1836 /* 1837 * Update 11n MIMO PS state according to received htcap. 1838 */ 1839 static __inline int 1840 htcap_update_mimo_ps(struct ieee80211_node *ni) 1841 { 1842 uint16_t oflags = ni->ni_flags; 1843 1844 switch (ni->ni_htcap & IEEE80211_HTCAP_SMPS) { 1845 case IEEE80211_HTCAP_SMPS_DYNAMIC: 1846 ni->ni_flags |= IEEE80211_NODE_MIMO_PS; 1847 ni->ni_flags |= IEEE80211_NODE_MIMO_RTS; 1848 break; 1849 case IEEE80211_HTCAP_SMPS_ENA: 1850 ni->ni_flags |= IEEE80211_NODE_MIMO_PS; 1851 ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS; 1852 break; 1853 case IEEE80211_HTCAP_SMPS_OFF: 1854 default: /* disable on rx of reserved value */ 1855 ni->ni_flags &= ~IEEE80211_NODE_MIMO_PS; 1856 ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS; 1857 break; 1858 } 1859 return (oflags ^ ni->ni_flags); 1860 } 1861 1862 /* 1863 * Update short GI state according to received htcap 1864 * and local settings. 1865 */ 1866 static __inline void 1867 htcap_update_shortgi(struct ieee80211_node *ni) 1868 { 1869 struct ieee80211vap *vap = ni->ni_vap; 1870 1871 ni->ni_flags &= ~(IEEE80211_NODE_SGI20|IEEE80211_NODE_SGI40); 1872 if ((ni->ni_htcap & IEEE80211_HTCAP_SHORTGI20) && 1873 (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20)) 1874 ni->ni_flags |= IEEE80211_NODE_SGI20; 1875 if ((ni->ni_htcap & IEEE80211_HTCAP_SHORTGI40) && 1876 (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40)) 1877 ni->ni_flags |= IEEE80211_NODE_SGI40; 1878 } 1879 1880 /* 1881 * Update LDPC state according to received htcap 1882 * and local settings. 1883 */ 1884 static __inline void 1885 htcap_update_ldpc(struct ieee80211_node *ni) 1886 { 1887 struct ieee80211vap *vap = ni->ni_vap; 1888 1889 if ((ni->ni_htcap & IEEE80211_HTCAP_LDPC) && 1890 (vap->iv_flags_ht & IEEE80211_FHT_LDPC_TX)) 1891 ni->ni_flags |= IEEE80211_NODE_LDPC; 1892 } 1893 1894 /* 1895 * Parse and update HT-related state extracted from 1896 * the HT cap and info ie's. 1897 * 1898 * This is called from the STA management path and 1899 * the ieee80211_node_join() path. It will take into 1900 * account the IEs discovered during scanning and 1901 * adjust things accordingly. 1902 */ 1903 void 1904 ieee80211_ht_updateparams(struct ieee80211_node *ni, 1905 const uint8_t *htcapie, const uint8_t *htinfoie) 1906 { 1907 struct ieee80211vap *vap = ni->ni_vap; 1908 const struct ieee80211_ie_htinfo *htinfo; 1909 1910 ieee80211_parse_htcap(ni, htcapie); 1911 if (vap->iv_htcaps & IEEE80211_HTC_SMPS) 1912 htcap_update_mimo_ps(ni); 1913 htcap_update_shortgi(ni); 1914 htcap_update_ldpc(ni); 1915 1916 if (htinfoie[0] == IEEE80211_ELEMID_VENDOR) 1917 htinfoie += 4; 1918 htinfo = (const struct ieee80211_ie_htinfo *) htinfoie; 1919 htinfo_parse(ni, htinfo); 1920 1921 /* 1922 * Defer the node channel change; we need to now 1923 * update VHT parameters before we do it. 1924 */ 1925 1926 if ((htinfo->hi_byte1 & IEEE80211_HTINFO_RIFSMODE_PERM) && 1927 (vap->iv_flags_ht & IEEE80211_FHT_RIFS)) 1928 ni->ni_flags |= IEEE80211_NODE_RIFS; 1929 else 1930 ni->ni_flags &= ~IEEE80211_NODE_RIFS; 1931 } 1932 1933 static uint32_t 1934 ieee80211_vht_get_vhtflags(struct ieee80211_node *ni, uint32_t htflags) 1935 { 1936 #define _RETURN_CHAN_BITS(_cb) \ 1937 do { \ 1938 if (0) IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, ni, \ 1939 "%s:%d: selected %b", __func__, __LINE__, \ 1940 (_cb), IEEE80211_CHAN_BITS); \ 1941 return (_cb); \ 1942 } while(0) 1943 struct ieee80211vap *vap; 1944 const struct ieee80211_ie_htinfo *htinfo; 1945 uint32_t vhtflags; 1946 bool can_vht160, can_vht80p80, can_vht80; 1947 bool ht40; 1948 1949 vap = ni->ni_vap; 1950 1951 /* If we do not support VHT or VHT is disabled just return. */ 1952 if ((ni->ni_flags & IEEE80211_NODE_VHT) == 0 || 1953 (vap->iv_vht_flags & IEEE80211_FVHT_VHT) == 0) 1954 _RETURN_CHAN_BITS(0); 1955 1956 /* 1957 * TODO: should we bail out if there's no htinfo? 1958 * Or just treat it as if we can't do the HT20/HT40 check? 1959 */ 1960 1961 /* 1962 * The original code was based on 1963 * 802.11ac-2013, Table 8-183x-VHT Operation Information subfields. 1964 * 802.11-2020, Table 9-274-VHT Operation Information subfields 1965 * has IEEE80211_VHT_CHANWIDTH_160MHZ and 1966 * IEEE80211_VHT_CHANWIDTH_80P80MHZ deprecated. 1967 * For current logic see 1968 * 802.11-2020, 11.38.1 Basic VHT BSS functionality. 1969 */ 1970 1971 htinfo = (const struct ieee80211_ie_htinfo *)ni->ni_ies.htinfo_ie; 1972 if (htinfo != NULL) 1973 ht40 = ((htinfo->hi_byte1 & IEEE80211_HTINFO_TXWIDTH) == 1974 IEEE80211_HTINFO_TXWIDTH_2040); 1975 else 1976 ht40 = false; 1977 1978 can_vht160 = can_vht80p80 = can_vht80 = false; 1979 1980 /* 20 Mhz */ 1981 if (!ht40) { 1982 /* Check for the full valid combination -- other fields be 0. */ 1983 if (ni->ni_vht_chanwidth != IEEE80211_VHT_CHANWIDTH_USE_HT || 1984 ni->ni_vht_chan2 != 0) 1985 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, ni, 1986 "%s: invalid VHT BSS bandwidth 0/%d/%d/%d", 1987 __func__, ni->ni_vht_chanwidth, 1988 ni->ni_vht_chan1, ni->ni_vht_chan2); 1989 1990 _RETURN_CHAN_BITS(IEEE80211_CHAN_VHT20 | IEEE80211_CHAN_HT20); 1991 } 1992 1993 vhtflags = 0; 1994 1995 /* We know we can at least do 40Mhz, so mirror the HT40 flags. */ 1996 if (htflags == IEEE80211_CHAN_HT40U) 1997 vhtflags |= IEEE80211_CHAN_HT40U; 1998 else if (htflags == IEEE80211_CHAN_HT40D) 1999 vhtflags |= IEEE80211_CHAN_HT40D; 2000 2001 /* 40 MHz */ 2002 if (ni->ni_vht_chanwidth == IEEE80211_VHT_CHANWIDTH_USE_HT) { 2003 if (ni->ni_vht_chan2 != 0) 2004 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, ni, 2005 "%s: invalid VHT BSS bandwidth 1/%d/%d/%d", 2006 __func__, ni->ni_vht_chanwidth, 2007 ni->ni_vht_chan1, ni->ni_vht_chan2); 2008 2009 if ((vap->iv_vht_flags & IEEE80211_FVHT_USEVHT40) != 0) { 2010 if (htflags == IEEE80211_CHAN_HT40U) 2011 _RETURN_CHAN_BITS(IEEE80211_CHAN_VHT40U | vhtflags); 2012 if (htflags == IEEE80211_CHAN_HT40D) 2013 _RETURN_CHAN_BITS(IEEE80211_CHAN_VHT40D | vhtflags); 2014 } 2015 2016 /* If we get here VHT40 is not supported or disabled. */ 2017 _RETURN_CHAN_BITS(IEEE80211_CHAN_VHT20 | IEEE80211_CHAN_HT20); 2018 } 2019 2020 /* Deprecated check for 160. */ 2021 if ((ni->ni_vht_chanwidth == IEEE80211_VHT_CHANWIDTH_160MHZ) && 2022 IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_IS_160MHZ(vap->iv_vht_cap.vht_cap_info) && 2023 (vap->iv_vht_flags & IEEE80211_FVHT_USEVHT160) != 0) 2024 _RETURN_CHAN_BITS(IEEE80211_CHAN_VHT160 | vhtflags); 2025 2026 /* Deprecated check for 80P80. */ 2027 if ((ni->ni_vht_chanwidth == IEEE80211_VHT_CHANWIDTH_80P80MHZ) && 2028 IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_IS_160_80P80MHZ(vap->iv_vht_cap.vht_cap_info) && 2029 (vap->iv_vht_flags & IEEE80211_FVHT_USEVHT80P80) != 0) 2030 _RETURN_CHAN_BITS(IEEE80211_CHAN_VHT80P80 | vhtflags); 2031 2032 if (ni->ni_vht_chanwidth != IEEE80211_VHT_CHANWIDTH_80MHZ) { 2033 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, ni, 2034 "%s: invalid VHT BSS bandwidth %d/%d/%d", __func__, 2035 ni->ni_vht_chanwidth, ni->ni_vht_chan2); 2036 2037 _RETURN_CHAN_BITS(0); 2038 } 2039 2040 /* CCFS1 > 0 and | CCFS1 - CCFS0 | = 8 */ 2041 if (ni->ni_vht_chan2 > 0 && (ni->ni_vht_chan2 - ni->ni_vht_chan1) == 8) 2042 can_vht160 = can_vht80 = true; 2043 2044 /* CCFS1 > 0 and | CCFS1 - CCFS0 | > 16 */ 2045 if (ni->ni_vht_chan2 > 0 && (ni->ni_vht_chan2 - ni->ni_vht_chan1) > 16) 2046 can_vht80p80 = can_vht80 = true; 2047 2048 /* CFFS1 == 0 */ 2049 if (ni->ni_vht_chan2 == 0) 2050 can_vht80 = true; 2051 2052 if (can_vht160 && (vap->iv_vht_flags & IEEE80211_FVHT_USEVHT160) != 0) 2053 _RETURN_CHAN_BITS(IEEE80211_CHAN_VHT160 | vhtflags); 2054 2055 if (can_vht80p80 && (vap->iv_vht_flags & IEEE80211_FVHT_USEVHT80P80) != 0) 2056 _RETURN_CHAN_BITS(IEEE80211_CHAN_VHT80P80 | vhtflags); 2057 2058 if (can_vht80 && (vap->iv_vht_flags & IEEE80211_FVHT_USEVHT80) != 0) 2059 _RETURN_CHAN_BITS(IEEE80211_CHAN_VHT80 | vhtflags); 2060 2061 if (ht40 && (vap->iv_vht_flags & IEEE80211_FVHT_USEVHT40) != 0) { 2062 if (htflags == IEEE80211_CHAN_HT40U) 2063 _RETURN_CHAN_BITS(IEEE80211_CHAN_VHT40U | vhtflags); 2064 if (htflags == IEEE80211_CHAN_HT40D) 2065 _RETURN_CHAN_BITS(IEEE80211_CHAN_VHT40D | vhtflags); 2066 } 2067 2068 /* Either we disabled support or got an invalid setting. */ 2069 _RETURN_CHAN_BITS(IEEE80211_CHAN_VHT20 | IEEE80211_CHAN_HT20); 2070 #undef _RETURN_CHAN_BITS 2071 } 2072 2073 /* 2074 * Final part of updating the HT parameters. 2075 * 2076 * This is called from the STA management path and 2077 * the ieee80211_node_join() path. It will take into 2078 * account the IEs discovered during scanning and 2079 * adjust things accordingly. 2080 * 2081 * This is done after a call to ieee80211_ht_updateparams() 2082 * because it (and the upcoming VHT version of updateparams) 2083 * needs to ensure everything is parsed before htinfo_update_chw() 2084 * is called - which will change the channel config for the 2085 * node for us. 2086 */ 2087 int 2088 ieee80211_ht_updateparams_final(struct ieee80211_node *ni, 2089 const uint8_t *htcapie, const uint8_t *htinfoie) 2090 { 2091 struct ieee80211vap *vap = ni->ni_vap; 2092 const struct ieee80211_ie_htinfo *htinfo; 2093 int htflags, vhtflags; 2094 int ret = 0; 2095 2096 htinfo = (const struct ieee80211_ie_htinfo *) htinfoie; 2097 2098 htflags = (vap->iv_flags_ht & IEEE80211_FHT_HT) ? 2099 IEEE80211_CHAN_HT20 : 0; 2100 2101 /* NB: honor operating mode constraint */ 2102 if ((htinfo->hi_byte1 & IEEE80211_HTINFO_TXWIDTH_2040) && 2103 (vap->iv_flags_ht & IEEE80211_FHT_USEHT40)) { 2104 if (ni->ni_ht2ndchan == IEEE80211_HTINFO_2NDCHAN_ABOVE) 2105 htflags = IEEE80211_CHAN_HT40U; 2106 else if (ni->ni_ht2ndchan == IEEE80211_HTINFO_2NDCHAN_BELOW) 2107 htflags = IEEE80211_CHAN_HT40D; 2108 } 2109 2110 /* 2111 * VHT flags - do much the same; check whether VHT is available 2112 * and if so, what our ideal channel use would be based on our 2113 * capabilities and the (pre-parsed) VHT info IE. 2114 */ 2115 vhtflags = ieee80211_vht_get_vhtflags(ni, htflags); 2116 2117 if (htinfo_update_chw(ni, htflags, vhtflags)) 2118 ret = 1; 2119 2120 return (ret); 2121 } 2122 2123 /* 2124 * Parse and update HT-related state extracted from the HT cap ie 2125 * for a station joining an HT BSS. 2126 * 2127 * This is called from the hostap path for each station. 2128 */ 2129 void 2130 ieee80211_ht_updatehtcap(struct ieee80211_node *ni, const uint8_t *htcapie) 2131 { 2132 struct ieee80211vap *vap = ni->ni_vap; 2133 2134 ieee80211_parse_htcap(ni, htcapie); 2135 if (vap->iv_htcaps & IEEE80211_HTC_SMPS) 2136 htcap_update_mimo_ps(ni); 2137 htcap_update_shortgi(ni); 2138 htcap_update_ldpc(ni); 2139 } 2140 2141 /* 2142 * Called once HT and VHT capabilities are parsed in hostap mode - 2143 * this will adjust the channel configuration of the given node 2144 * based on the configuration and capabilities. 2145 */ 2146 void 2147 ieee80211_ht_updatehtcap_final(struct ieee80211_node *ni) 2148 { 2149 struct ieee80211vap *vap = ni->ni_vap; 2150 int htflags; 2151 int vhtflags; 2152 2153 /* NB: honor operating mode constraint */ 2154 /* XXX 40 MHz intolerant */ 2155 htflags = (vap->iv_flags_ht & IEEE80211_FHT_HT) ? 2156 IEEE80211_CHAN_HT20 : 0; 2157 if ((ni->ni_htcap & IEEE80211_HTCAP_CHWIDTH40) && 2158 (vap->iv_flags_ht & IEEE80211_FHT_USEHT40)) { 2159 if (IEEE80211_IS_CHAN_HT40U(vap->iv_bss->ni_chan)) 2160 htflags = IEEE80211_CHAN_HT40U; 2161 else if (IEEE80211_IS_CHAN_HT40D(vap->iv_bss->ni_chan)) 2162 htflags = IEEE80211_CHAN_HT40D; 2163 } 2164 /* 2165 * VHT flags - do much the same; check whether VHT is available 2166 * and if so, what our ideal channel use would be based on our 2167 * capabilities and the (pre-parsed) VHT info IE. 2168 */ 2169 vhtflags = ieee80211_vht_get_vhtflags(ni, htflags); 2170 2171 (void) htinfo_update_chw(ni, htflags, vhtflags); 2172 } 2173 2174 /* 2175 * Install received HT rate set by parsing the HT cap ie. 2176 */ 2177 int 2178 ieee80211_setup_htrates(struct ieee80211_node *ni, const uint8_t *ie, int flags) 2179 { 2180 struct ieee80211com *ic = ni->ni_ic; 2181 struct ieee80211vap *vap = ni->ni_vap; 2182 const struct ieee80211_ie_htcap *htcap; 2183 struct ieee80211_htrateset *rs; 2184 int i, maxequalmcs, maxunequalmcs; 2185 2186 maxequalmcs = ic->ic_txstream * 8 - 1; 2187 maxunequalmcs = 0; 2188 if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL) { 2189 if (ic->ic_txstream >= 2) 2190 maxunequalmcs = 38; 2191 if (ic->ic_txstream >= 3) 2192 maxunequalmcs = 52; 2193 if (ic->ic_txstream >= 4) 2194 maxunequalmcs = 76; 2195 } 2196 2197 rs = &ni->ni_htrates; 2198 memset(rs, 0, sizeof(*rs)); 2199 if (ie != NULL) { 2200 if (ie[0] == IEEE80211_ELEMID_VENDOR) 2201 ie += 4; 2202 htcap = (const struct ieee80211_ie_htcap *) ie; 2203 for (i = 0; i < IEEE80211_HTRATE_MAXSIZE; i++) { 2204 if (isclr(htcap->hc_mcsset, i)) 2205 continue; 2206 if (rs->rs_nrates == IEEE80211_HTRATE_MAXSIZE) { 2207 IEEE80211_NOTE(vap, 2208 IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni, 2209 "WARNING, HT rate set too large; only " 2210 "using %u rates", IEEE80211_HTRATE_MAXSIZE); 2211 vap->iv_stats.is_rx_rstoobig++; 2212 break; 2213 } 2214 if (i <= 31 && i > maxequalmcs) 2215 continue; 2216 if (i == 32 && 2217 (ic->ic_htcaps & IEEE80211_HTC_TXMCS32) == 0) 2218 continue; 2219 if (i > 32 && i > maxunequalmcs) 2220 continue; 2221 rs->rs_rates[rs->rs_nrates++] = i; 2222 } 2223 } 2224 return ieee80211_fix_rate(ni, (struct ieee80211_rateset *) rs, flags); 2225 } 2226 2227 /* 2228 * Mark rates in a node's HT rate set as basic according 2229 * to the information in the supplied HT info ie. 2230 */ 2231 void 2232 ieee80211_setup_basic_htrates(struct ieee80211_node *ni, const uint8_t *ie) 2233 { 2234 const struct ieee80211_ie_htinfo *htinfo; 2235 struct ieee80211_htrateset *rs; 2236 int i, j; 2237 2238 if (ie[0] == IEEE80211_ELEMID_VENDOR) 2239 ie += 4; 2240 htinfo = (const struct ieee80211_ie_htinfo *) ie; 2241 rs = &ni->ni_htrates; 2242 if (rs->rs_nrates == 0) { 2243 IEEE80211_NOTE(ni->ni_vap, 2244 IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni, 2245 "%s", "WARNING, empty HT rate set"); 2246 return; 2247 } 2248 for (i = 0; i < IEEE80211_HTRATE_MAXSIZE; i++) { 2249 if (isclr(htinfo->hi_basicmcsset, i)) 2250 continue; 2251 for (j = 0; j < rs->rs_nrates; j++) 2252 if ((rs->rs_rates[j] & IEEE80211_RATE_VAL) == i) 2253 rs->rs_rates[j] |= IEEE80211_RATE_BASIC; 2254 } 2255 } 2256 2257 static void 2258 ampdu_tx_setup(struct ieee80211_tx_ampdu *tap) 2259 { 2260 callout_init(&tap->txa_timer, 1); 2261 tap->txa_flags |= IEEE80211_AGGR_SETUP; 2262 tap->txa_lastsample = ticks; 2263 } 2264 2265 static void 2266 ampdu_tx_stop(struct ieee80211_tx_ampdu *tap) 2267 { 2268 struct ieee80211_node *ni = tap->txa_ni; 2269 struct ieee80211com *ic = ni->ni_ic; 2270 2271 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N, 2272 tap->txa_ni, 2273 "%s: called", 2274 __func__); 2275 2276 KASSERT(tap->txa_flags & IEEE80211_AGGR_SETUP, 2277 ("txa_flags 0x%x tid %d ac %d", tap->txa_flags, tap->txa_tid, 2278 TID_TO_WME_AC(tap->txa_tid))); 2279 2280 /* 2281 * Stop BA stream if setup so driver has a chance 2282 * to reclaim any resources it might have allocated. 2283 */ 2284 ic->ic_addba_stop(ni, tap); 2285 /* 2286 * Stop any pending BAR transmit. 2287 */ 2288 bar_stop_timer(tap); 2289 2290 /* 2291 * Reset packet estimate. 2292 */ 2293 ieee80211_txampdu_init_pps(tap); 2294 2295 /* NB: clearing NAK means we may re-send ADDBA */ 2296 tap->txa_flags &= ~(IEEE80211_AGGR_SETUP | IEEE80211_AGGR_NAK); 2297 } 2298 2299 /* 2300 * ADDBA response timeout. 2301 * 2302 * If software aggregation and per-TID queue management was done here, 2303 * that queue would be unpaused after the ADDBA timeout occurs. 2304 */ 2305 static void 2306 addba_timeout(void *arg) 2307 { 2308 struct ieee80211_tx_ampdu *tap = arg; 2309 struct ieee80211_node *ni = tap->txa_ni; 2310 struct ieee80211com *ic = ni->ni_ic; 2311 2312 /* XXX ? */ 2313 tap->txa_flags &= ~IEEE80211_AGGR_XCHGPEND; 2314 tap->txa_attempts++; 2315 ic->ic_addba_response_timeout(ni, tap); 2316 } 2317 2318 static void 2319 addba_start_timeout(struct ieee80211_tx_ampdu *tap) 2320 { 2321 /* XXX use CALLOUT_PENDING instead? */ 2322 callout_reset(&tap->txa_timer, ieee80211_addba_timeout, 2323 addba_timeout, tap); 2324 tap->txa_flags |= IEEE80211_AGGR_XCHGPEND; 2325 tap->txa_nextrequest = ticks + ieee80211_addba_timeout; 2326 } 2327 2328 static void 2329 addba_stop_timeout(struct ieee80211_tx_ampdu *tap) 2330 { 2331 /* XXX use CALLOUT_PENDING instead? */ 2332 if (tap->txa_flags & IEEE80211_AGGR_XCHGPEND) { 2333 callout_stop(&tap->txa_timer); 2334 tap->txa_flags &= ~IEEE80211_AGGR_XCHGPEND; 2335 } 2336 } 2337 2338 static void 2339 null_addba_response_timeout(struct ieee80211_node *ni, 2340 struct ieee80211_tx_ampdu *tap) 2341 { 2342 } 2343 2344 /* 2345 * Default method for requesting A-MPDU tx aggregation. 2346 * We setup the specified state block and start a timer 2347 * to wait for an ADDBA response frame. 2348 */ 2349 static int 2350 ieee80211_addba_request(struct ieee80211_node *ni, 2351 struct ieee80211_tx_ampdu *tap, 2352 int dialogtoken, int baparamset, int batimeout) 2353 { 2354 int bufsiz; 2355 2356 /* XXX locking */ 2357 tap->txa_token = dialogtoken; 2358 tap->txa_flags |= IEEE80211_AGGR_IMMEDIATE; 2359 bufsiz = _IEEE80211_MASKSHIFT(baparamset, IEEE80211_BAPS_BUFSIZ); 2360 tap->txa_wnd = (bufsiz == 0) ? 2361 IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX); 2362 addba_start_timeout(tap); 2363 return 1; 2364 } 2365 2366 /* 2367 * Called by drivers that wish to request an ADDBA session be 2368 * setup. This brings it up and starts the request timer. 2369 */ 2370 int 2371 ieee80211_ampdu_tx_request_ext(struct ieee80211_node *ni, int tid) 2372 { 2373 struct ieee80211_tx_ampdu *tap; 2374 2375 if (tid < 0 || tid > 15) 2376 return (0); 2377 tap = &ni->ni_tx_ampdu[tid]; 2378 2379 /* XXX locking */ 2380 if ((tap->txa_flags & IEEE80211_AGGR_SETUP) == 0) { 2381 /* do deferred setup of state */ 2382 ampdu_tx_setup(tap); 2383 } 2384 /* XXX hack for not doing proper locking */ 2385 tap->txa_flags &= ~IEEE80211_AGGR_NAK; 2386 addba_start_timeout(tap); 2387 return (1); 2388 } 2389 2390 /* 2391 * Called by drivers that have marked a session as active. 2392 */ 2393 int 2394 ieee80211_ampdu_tx_request_active_ext(struct ieee80211_node *ni, int tid, 2395 int status) 2396 { 2397 struct ieee80211_tx_ampdu *tap; 2398 2399 if (tid < 0 || tid > 15) 2400 return (0); 2401 tap = &ni->ni_tx_ampdu[tid]; 2402 2403 /* XXX locking */ 2404 addba_stop_timeout(tap); 2405 if (status == 1) { 2406 tap->txa_flags |= IEEE80211_AGGR_RUNNING; 2407 tap->txa_attempts = 0; 2408 } else { 2409 /* mark tid so we don't try again */ 2410 tap->txa_flags |= IEEE80211_AGGR_NAK; 2411 } 2412 return (1); 2413 } 2414 2415 /* 2416 * Default method for processing an A-MPDU tx aggregation 2417 * response. We shutdown any pending timer and update the 2418 * state block according to the reply. 2419 */ 2420 static int 2421 ieee80211_addba_response(struct ieee80211_node *ni, 2422 struct ieee80211_tx_ampdu *tap, 2423 int status, int baparamset, int batimeout) 2424 { 2425 struct ieee80211vap *vap = ni->ni_vap; 2426 int bufsiz; 2427 2428 /* XXX locking */ 2429 addba_stop_timeout(tap); 2430 if (status == IEEE80211_STATUS_SUCCESS) { 2431 bufsiz = _IEEE80211_MASKSHIFT(baparamset, IEEE80211_BAPS_BUFSIZ); 2432 /* XXX override our request? */ 2433 tap->txa_wnd = (bufsiz == 0) ? 2434 IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX); 2435 #ifdef __notyet__ 2436 tid = _IEEE80211_MASKSHIFT(baparamset, IEEE80211_BAPS_TID); 2437 #endif 2438 tap->txa_flags |= IEEE80211_AGGR_RUNNING; 2439 tap->txa_attempts = 0; 2440 /* TODO: this should be a vap flag */ 2441 if ((vap->iv_htcaps & IEEE80211_HTC_TX_AMSDU_AMPDU) && 2442 (ni->ni_flags & IEEE80211_NODE_AMSDU_TX) && 2443 (_IEEE80211_MASKSHIFT(baparamset, IEEE80211_BAPS_AMSDU))) 2444 tap->txa_flags |= IEEE80211_AGGR_AMSDU; 2445 else 2446 tap->txa_flags &= ~IEEE80211_AGGR_AMSDU; 2447 } else { 2448 /* mark tid so we don't try again */ 2449 tap->txa_flags |= IEEE80211_AGGR_NAK; 2450 } 2451 return 1; 2452 } 2453 2454 /* 2455 * Default method for stopping A-MPDU tx aggregation. 2456 * Any timer is cleared and we drain any pending frames. 2457 */ 2458 static void 2459 ieee80211_addba_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap) 2460 { 2461 /* XXX locking */ 2462 addba_stop_timeout(tap); 2463 if (tap->txa_flags & IEEE80211_AGGR_RUNNING) { 2464 /* XXX clear aggregation queue */ 2465 tap->txa_flags &= ~(IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_AMSDU); 2466 } 2467 tap->txa_attempts = 0; 2468 } 2469 2470 /* 2471 * Process a received action frame using the default aggregation 2472 * policy. We intercept ADDBA-related frames and use them to 2473 * update our aggregation state. All other frames are passed up 2474 * for processing by ieee80211_recv_action. 2475 */ 2476 static int 2477 ht_recv_action_ba_addba_request(struct ieee80211_node *ni, 2478 const struct ieee80211_frame *wh, 2479 const uint8_t *frm, const uint8_t *efrm) 2480 { 2481 struct ieee80211com *ic = ni->ni_ic; 2482 struct ieee80211vap *vap = ni->ni_vap; 2483 struct ieee80211_rx_ampdu *rap; 2484 uint8_t dialogtoken; 2485 uint16_t baparamset, batimeout, baseqctl; 2486 uint16_t args[5]; 2487 int tid; 2488 2489 dialogtoken = frm[2]; 2490 baparamset = le16dec(frm+3); 2491 batimeout = le16dec(frm+5); 2492 baseqctl = le16dec(frm+7); 2493 2494 tid = _IEEE80211_MASKSHIFT(baparamset, IEEE80211_BAPS_TID); 2495 2496 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 2497 "recv ADDBA request: dialogtoken %u baparamset 0x%x " 2498 "(tid %d bufsiz %d) batimeout %d baseqctl %d:%d amsdu %d", 2499 dialogtoken, baparamset, 2500 tid, _IEEE80211_MASKSHIFT(baparamset, IEEE80211_BAPS_BUFSIZ), 2501 batimeout, 2502 _IEEE80211_MASKSHIFT(baseqctl, IEEE80211_BASEQ_START), 2503 _IEEE80211_MASKSHIFT(baseqctl, IEEE80211_BASEQ_FRAG), 2504 _IEEE80211_MASKSHIFT(baparamset, IEEE80211_BAPS_AMSDU)); 2505 2506 rap = &ni->ni_rx_ampdu[tid]; 2507 2508 /* Send ADDBA response */ 2509 args[0] = dialogtoken; 2510 /* 2511 * NB: We ack only if the sta associated with HT and 2512 * the ap is configured to do AMPDU rx (the latter 2513 * violates the 11n spec and is mostly for testing). 2514 */ 2515 if ((ni->ni_flags & IEEE80211_NODE_AMPDU_RX) && 2516 (vap->iv_flags_ht & IEEE80211_FHT_AMPDU_RX)) { 2517 /* XXX TODO: handle ampdu_rx_start failure */ 2518 ic->ic_ampdu_rx_start(ni, rap, 2519 baparamset, batimeout, baseqctl); 2520 2521 args[1] = IEEE80211_STATUS_SUCCESS; 2522 } else { 2523 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 2524 ni, "reject ADDBA request: %s", 2525 ni->ni_flags & IEEE80211_NODE_AMPDU_RX ? 2526 "administratively disabled" : 2527 "not negotiated for station"); 2528 vap->iv_stats.is_addba_reject++; 2529 args[1] = IEEE80211_STATUS_UNSPECIFIED; 2530 } 2531 /* XXX honor rap flags? */ 2532 args[2] = IEEE80211_BAPS_POLICY_IMMEDIATE 2533 | _IEEE80211_SHIFTMASK(tid, IEEE80211_BAPS_TID) 2534 | _IEEE80211_SHIFTMASK(rap->rxa_wnd, IEEE80211_BAPS_BUFSIZ) 2535 ; 2536 2537 /* 2538 * TODO: we're out of iv_flags_ht fields; once 2539 * this is extended we should make this configurable. 2540 */ 2541 if ((baparamset & IEEE80211_BAPS_AMSDU) && 2542 (ni->ni_flags & IEEE80211_NODE_AMSDU_RX) && 2543 (vap->iv_htcaps & IEEE80211_HTC_RX_AMSDU_AMPDU)) 2544 args[2] |= IEEE80211_BAPS_AMSDU; 2545 2546 args[3] = 0; 2547 args[4] = 0; 2548 ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA, 2549 IEEE80211_ACTION_BA_ADDBA_RESPONSE, args); 2550 return 0; 2551 } 2552 2553 static int 2554 ht_recv_action_ba_addba_response(struct ieee80211_node *ni, 2555 const struct ieee80211_frame *wh, 2556 const uint8_t *frm, const uint8_t *efrm) 2557 { 2558 struct ieee80211com *ic = ni->ni_ic; 2559 struct ieee80211vap *vap = ni->ni_vap; 2560 struct ieee80211_tx_ampdu *tap; 2561 uint8_t dialogtoken, policy; 2562 uint16_t baparamset, batimeout, code; 2563 int tid; 2564 #ifdef IEEE80211_DEBUG 2565 int amsdu, bufsiz; 2566 #endif 2567 2568 dialogtoken = frm[2]; 2569 code = le16dec(frm+3); 2570 baparamset = le16dec(frm+5); 2571 tid = _IEEE80211_MASKSHIFT(baparamset, IEEE80211_BAPS_TID); 2572 #ifdef IEEE80211_DEBUG 2573 bufsiz = _IEEE80211_MASKSHIFT(baparamset, IEEE80211_BAPS_BUFSIZ); 2574 amsdu = !! _IEEE80211_MASKSHIFT(baparamset, IEEE80211_BAPS_AMSDU); 2575 #endif 2576 policy = _IEEE80211_MASKSHIFT(baparamset, IEEE80211_BAPS_POLICY); 2577 batimeout = le16dec(frm+7); 2578 2579 tap = &ni->ni_tx_ampdu[tid]; 2580 if ((tap->txa_flags & IEEE80211_AGGR_XCHGPEND) == 0) { 2581 IEEE80211_DISCARD_MAC(vap, 2582 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 2583 ni->ni_macaddr, "ADDBA response", 2584 "no pending ADDBA, tid %d dialogtoken %u " 2585 "code %d", tid, dialogtoken, code); 2586 vap->iv_stats.is_addba_norequest++; 2587 return 0; 2588 } 2589 if (dialogtoken != tap->txa_token) { 2590 IEEE80211_DISCARD_MAC(vap, 2591 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 2592 ni->ni_macaddr, "ADDBA response", 2593 "dialogtoken mismatch: waiting for %d, " 2594 "received %d, tid %d code %d", 2595 tap->txa_token, dialogtoken, tid, code); 2596 vap->iv_stats.is_addba_badtoken++; 2597 return 0; 2598 } 2599 /* NB: assumes IEEE80211_AGGR_IMMEDIATE is 1 */ 2600 if (policy != (tap->txa_flags & IEEE80211_AGGR_IMMEDIATE)) { 2601 IEEE80211_DISCARD_MAC(vap, 2602 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 2603 ni->ni_macaddr, "ADDBA response", 2604 "policy mismatch: expecting %s, " 2605 "received %s, tid %d code %d", 2606 tap->txa_flags & IEEE80211_AGGR_IMMEDIATE, 2607 policy, tid, code); 2608 vap->iv_stats.is_addba_badpolicy++; 2609 return 0; 2610 } 2611 #if 0 2612 /* XXX we take MIN in ieee80211_addba_response */ 2613 if (bufsiz > IEEE80211_AGGR_BAWMAX) { 2614 IEEE80211_DISCARD_MAC(vap, 2615 IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 2616 ni->ni_macaddr, "ADDBA response", 2617 "BA window too large: max %d, " 2618 "received %d, tid %d code %d", 2619 bufsiz, IEEE80211_AGGR_BAWMAX, tid, code); 2620 vap->iv_stats.is_addba_badbawinsize++; 2621 return 0; 2622 } 2623 #endif 2624 2625 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 2626 "recv ADDBA response: dialogtoken %u code %d " 2627 "baparamset 0x%x (tid %d bufsiz %d amsdu %d) batimeout %d", 2628 dialogtoken, code, baparamset, tid, 2629 bufsiz, 2630 amsdu, 2631 batimeout); 2632 ic->ic_addba_response(ni, tap, code, baparamset, batimeout); 2633 return 0; 2634 } 2635 2636 static int 2637 ht_recv_action_ba_delba(struct ieee80211_node *ni, 2638 const struct ieee80211_frame *wh, 2639 const uint8_t *frm, const uint8_t *efrm) 2640 { 2641 struct ieee80211com *ic = ni->ni_ic; 2642 struct ieee80211_rx_ampdu *rap; 2643 struct ieee80211_tx_ampdu *tap; 2644 uint16_t baparamset; 2645 #ifdef IEEE80211_DEBUG 2646 uint16_t code; 2647 #endif 2648 int tid; 2649 2650 baparamset = le16dec(frm+2); 2651 #ifdef IEEE80211_DEBUG 2652 code = le16dec(frm+4); 2653 #endif 2654 2655 tid = _IEEE80211_MASKSHIFT(baparamset, IEEE80211_DELBAPS_TID); 2656 2657 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 2658 "recv DELBA: baparamset 0x%x (tid %d initiator %d) " 2659 "code %d", baparamset, tid, 2660 _IEEE80211_MASKSHIFT(baparamset, IEEE80211_DELBAPS_INIT), code); 2661 2662 if ((baparamset & IEEE80211_DELBAPS_INIT) == 0) { 2663 tap = &ni->ni_tx_ampdu[tid]; 2664 ic->ic_addba_stop(ni, tap); 2665 } else { 2666 rap = &ni->ni_rx_ampdu[tid]; 2667 ic->ic_ampdu_rx_stop(ni, rap); 2668 } 2669 return 0; 2670 } 2671 2672 /* 2673 * Handle the HT channel width action frame. 2674 * 2675 * 802.11-2020 9.6.11.2 (Notify Channel Width frame format). 2676 */ 2677 static int 2678 ht_recv_action_ht_txchwidth(struct ieee80211_node *ni, 2679 const struct ieee80211_frame *wh __unused, 2680 const uint8_t *frm, const uint8_t *efrm __unused) 2681 { 2682 int chw; 2683 2684 /* If 20/40 is not supported the chw cannot change. */ 2685 if ((ni->ni_htcap & IEEE80211_HTCAP_CHWIDTH40) == 0) 2686 return (0); 2687 2688 /* 2689 * The supported values are either 0 (any supported width) 2690 * or 1 (HT20). 80, 160, etc MHz widths are not represented 2691 * here. 2692 */ 2693 chw = (frm[2] == IEEE80211_A_HT_TXCHWIDTH_2040) ? 2694 NET80211_STA_RX_BW_40 : NET80211_STA_RX_BW_20; 2695 2696 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 2697 "%s: HT txchwidth, width %d%s (%s)", __func__, 2698 chw, ni->ni_chw != chw ? "*" : "", net80211_ni_chw_to_str(chw)); 2699 if (chw != ni->ni_chw) { 2700 /* XXX does this need to change the ht40 station count? */ 2701 ni->ni_chw = chw; 2702 /* XXX notify on change */ 2703 } 2704 return 0; 2705 } 2706 2707 static int 2708 ht_recv_action_ht_mimopwrsave(struct ieee80211_node *ni, 2709 const struct ieee80211_frame *wh, 2710 const uint8_t *frm, const uint8_t *efrm) 2711 { 2712 const struct ieee80211_action_ht_mimopowersave *mps = 2713 (const struct ieee80211_action_ht_mimopowersave *) frm; 2714 2715 /* XXX check iv_htcaps */ 2716 if (mps->am_control & IEEE80211_A_HT_MIMOPWRSAVE_ENA) 2717 ni->ni_flags |= IEEE80211_NODE_MIMO_PS; 2718 else 2719 ni->ni_flags &= ~IEEE80211_NODE_MIMO_PS; 2720 if (mps->am_control & IEEE80211_A_HT_MIMOPWRSAVE_MODE) 2721 ni->ni_flags |= IEEE80211_NODE_MIMO_RTS; 2722 else 2723 ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS; 2724 /* XXX notify on change */ 2725 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 2726 "%s: HT MIMO PS (%s%s)", __func__, 2727 (ni->ni_flags & IEEE80211_NODE_MIMO_PS) ? "on" : "off", 2728 (ni->ni_flags & IEEE80211_NODE_MIMO_RTS) ? "+rts" : "" 2729 ); 2730 return 0; 2731 } 2732 2733 /* 2734 * Transmit processing. 2735 */ 2736 2737 /* 2738 * Check if A-MPDU should be requested/enabled for a stream. 2739 * We require a traffic rate above a per-AC threshold and we 2740 * also handle backoff from previous failed attempts. 2741 * 2742 * Drivers may override this method to bring in information 2743 * such as link state conditions in making the decision. 2744 */ 2745 static int 2746 ieee80211_ampdu_enable(struct ieee80211_node *ni, 2747 struct ieee80211_tx_ampdu *tap) 2748 { 2749 struct ieee80211vap *vap = ni->ni_vap; 2750 2751 if (tap->txa_avgpps < 2752 vap->iv_ampdu_mintraffic[TID_TO_WME_AC(tap->txa_tid)]) 2753 return 0; 2754 /* XXX check rssi? */ 2755 if (tap->txa_attempts >= ieee80211_addba_maxtries && 2756 ieee80211_time_after(ticks, tap->txa_nextrequest)) { 2757 /* 2758 * Don't retry too often; txa_nextrequest is set 2759 * to the minimum interval we'll retry after 2760 * ieee80211_addba_maxtries failed attempts are made. 2761 */ 2762 return 0; 2763 } 2764 IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni, 2765 "enable AMPDU on tid %d (%s), avgpps %d pkts %d attempt %d", 2766 tap->txa_tid, ieee80211_wme_acnames[TID_TO_WME_AC(tap->txa_tid)], 2767 tap->txa_avgpps, tap->txa_pkts, tap->txa_attempts); 2768 return 1; 2769 } 2770 2771 /** 2772 * @brief Request A-MPDU tx aggregation. 2773 * 2774 * Setup local state and issue an ADDBA request. BA use will only happen after 2775 * the other end replies with ADDBA response. 2776 * 2777 * @param ni ieee80211_node update 2778 * @param tap tx_ampdu state 2779 * @returns 1 on success and 0 on error 2780 */ 2781 int 2782 ieee80211_ampdu_request(struct ieee80211_node *ni, 2783 struct ieee80211_tx_ampdu *tap) 2784 { 2785 struct ieee80211com *ic = ni->ni_ic; 2786 uint16_t args[5]; 2787 int tid, dialogtoken, error; 2788 static int tokens = 0; /* XXX */ 2789 2790 /* XXX locking */ 2791 if ((tap->txa_flags & IEEE80211_AGGR_SETUP) == 0) { 2792 /* do deferred setup of state */ 2793 ampdu_tx_setup(tap); 2794 } 2795 /* XXX hack for not doing proper locking */ 2796 tap->txa_flags &= ~IEEE80211_AGGR_NAK; 2797 2798 dialogtoken = (tokens+1) % 63; /* XXX */ 2799 tid = tap->txa_tid; 2800 2801 /* 2802 * XXX TODO: This is racy with any other parallel TX going on. :( 2803 */ 2804 tap->txa_start = ni->ni_txseqs[tid]; 2805 2806 args[0] = dialogtoken; 2807 args[1] = 0; /* NB: status code not used */ 2808 args[2] = IEEE80211_BAPS_POLICY_IMMEDIATE 2809 | _IEEE80211_SHIFTMASK(tid, IEEE80211_BAPS_TID) 2810 | _IEEE80211_SHIFTMASK(IEEE80211_AGGR_BAWMAX, 2811 IEEE80211_BAPS_BUFSIZ) 2812 ; 2813 2814 /* XXX TODO: this should be a flag, not iv_htcaps */ 2815 if ((ni->ni_flags & IEEE80211_NODE_AMSDU_TX) && 2816 (ni->ni_vap->iv_htcaps & IEEE80211_HTC_TX_AMSDU_AMPDU)) 2817 args[2] |= IEEE80211_BAPS_AMSDU; 2818 2819 args[3] = 0; /* batimeout */ 2820 /* NB: do first so there's no race against reply */ 2821 if (!ic->ic_addba_request(ni, tap, dialogtoken, args[2], args[3])) { 2822 /* unable to setup state, don't make request */ 2823 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 2824 ni, "%s: could not setup BA stream for TID %d AC %d", 2825 __func__, tap->txa_tid, TID_TO_WME_AC(tap->txa_tid)); 2826 /* defer next try so we don't slam the driver with requests */ 2827 tap->txa_attempts = ieee80211_addba_maxtries; 2828 /* NB: check in case driver wants to override */ 2829 if (ieee80211_time_before_eq(tap->txa_nextrequest, ticks)) 2830 tap->txa_nextrequest = ticks + ieee80211_addba_backoff; 2831 return 0; 2832 } 2833 tokens = dialogtoken; /* allocate token */ 2834 /* NB: after calling ic_addba_request so driver can set txa_start */ 2835 args[4] = _IEEE80211_SHIFTMASK(tap->txa_start, IEEE80211_BASEQ_START) 2836 | _IEEE80211_SHIFTMASK(0, IEEE80211_BASEQ_FRAG) 2837 ; 2838 2839 error = ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA, 2840 IEEE80211_ACTION_BA_ADDBA_REQUEST, args); 2841 /* Silly return of 1 for success here. */ 2842 return (error == 0); 2843 } 2844 2845 /* 2846 * Terminate an AMPDU tx stream. State is reclaimed 2847 * and the peer notified with a DelBA Action frame. 2848 */ 2849 void 2850 ieee80211_ampdu_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 2851 int reason) 2852 { 2853 struct ieee80211com *ic = ni->ni_ic; 2854 struct ieee80211vap *vap = ni->ni_vap; 2855 uint16_t args[4]; 2856 2857 /* XXX locking */ 2858 tap->txa_flags &= ~IEEE80211_AGGR_BARPEND; 2859 if (IEEE80211_AMPDU_RUNNING(tap)) { 2860 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 2861 ni, "%s: stop BA stream for TID %d (reason: %d (%s))", 2862 __func__, tap->txa_tid, reason, 2863 ieee80211_reason_to_string(reason)); 2864 vap->iv_stats.is_ampdu_stop++; 2865 2866 ic->ic_addba_stop(ni, tap); 2867 args[0] = tap->txa_tid; 2868 args[1] = IEEE80211_DELBAPS_INIT; 2869 args[2] = reason; /* XXX reason code */ 2870 ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA, 2871 IEEE80211_ACTION_BA_DELBA, args); 2872 } else { 2873 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 2874 ni, "%s: BA stream for TID %d not running " 2875 "(reason: %d (%s))", __func__, tap->txa_tid, reason, 2876 ieee80211_reason_to_string(reason)); 2877 vap->iv_stats.is_ampdu_stop_failed++; 2878 } 2879 } 2880 2881 /* XXX */ 2882 static void bar_start_timer(struct ieee80211_tx_ampdu *tap); 2883 2884 static void 2885 bar_timeout(void *arg) 2886 { 2887 struct ieee80211_tx_ampdu *tap = arg; 2888 struct ieee80211_node *ni = tap->txa_ni; 2889 2890 KASSERT((tap->txa_flags & IEEE80211_AGGR_XCHGPEND) == 0, 2891 ("bar/addba collision, flags 0x%x", tap->txa_flags)); 2892 2893 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 2894 ni, "%s: tid %u flags 0x%x attempts %d", __func__, 2895 tap->txa_tid, tap->txa_flags, tap->txa_attempts); 2896 2897 /* guard against race with bar_tx_complete */ 2898 if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) == 0) 2899 return; 2900 /* XXX ? */ 2901 if (tap->txa_attempts >= ieee80211_bar_maxtries) { 2902 struct ieee80211com *ic = ni->ni_ic; 2903 2904 ni->ni_vap->iv_stats.is_ampdu_bar_tx_fail++; 2905 /* 2906 * If (at least) the last BAR TX timeout was due to 2907 * an ieee80211_send_bar() failures, then we need 2908 * to make sure we notify the driver that a BAR 2909 * TX did occur and fail. This gives the driver 2910 * a chance to undo any queue pause that may 2911 * have occurred. 2912 */ 2913 ic->ic_bar_response(ni, tap, 1); 2914 ieee80211_ampdu_stop(ni, tap, IEEE80211_REASON_TIMEOUT); 2915 } else { 2916 ni->ni_vap->iv_stats.is_ampdu_bar_tx_retry++; 2917 if (ieee80211_send_bar(ni, tap, tap->txa_seqpending) != 0) { 2918 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 2919 ni, "%s: failed to TX, starting timer\n", 2920 __func__); 2921 /* 2922 * If ieee80211_send_bar() fails here, the 2923 * timer may have stopped and/or the pending 2924 * flag may be clear. Because of this, 2925 * fake the BARPEND and reset the timer. 2926 * A retransmission attempt will then occur 2927 * during the next timeout. 2928 */ 2929 /* XXX locking */ 2930 tap->txa_flags |= IEEE80211_AGGR_BARPEND; 2931 bar_start_timer(tap); 2932 } 2933 } 2934 } 2935 2936 static void 2937 bar_start_timer(struct ieee80211_tx_ampdu *tap) 2938 { 2939 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N, 2940 tap->txa_ni, 2941 "%s: called", 2942 __func__); 2943 callout_reset(&tap->txa_timer, ieee80211_bar_timeout, bar_timeout, tap); 2944 } 2945 2946 static void 2947 bar_stop_timer(struct ieee80211_tx_ampdu *tap) 2948 { 2949 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N, 2950 tap->txa_ni, 2951 "%s: called", 2952 __func__); 2953 callout_stop(&tap->txa_timer); 2954 } 2955 2956 static void 2957 bar_tx_complete(struct ieee80211_node *ni, void *arg, int status) 2958 { 2959 struct ieee80211_tx_ampdu *tap = arg; 2960 2961 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 2962 ni, "%s: tid %u flags 0x%x pending %d status %d", 2963 __func__, tap->txa_tid, tap->txa_flags, 2964 callout_pending(&tap->txa_timer), status); 2965 2966 ni->ni_vap->iv_stats.is_ampdu_bar_tx++; 2967 /* XXX locking */ 2968 if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) && 2969 callout_pending(&tap->txa_timer)) { 2970 struct ieee80211com *ic = ni->ni_ic; 2971 2972 if (status == 0) /* ACK'd */ 2973 bar_stop_timer(tap); 2974 ic->ic_bar_response(ni, tap, status); 2975 /* NB: just let timer expire so we pace requests */ 2976 } 2977 } 2978 2979 static void 2980 ieee80211_bar_response(struct ieee80211_node *ni, 2981 struct ieee80211_tx_ampdu *tap, int status) 2982 { 2983 2984 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N, 2985 tap->txa_ni, 2986 "%s: called", 2987 __func__); 2988 if (status == 0) { /* got ACK */ 2989 IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 2990 ni, "BAR moves BA win <%u:%u> (%u frames) txseq %u tid %u", 2991 tap->txa_start, 2992 IEEE80211_SEQ_ADD(tap->txa_start, tap->txa_wnd-1), 2993 tap->txa_qframes, tap->txa_seqpending, 2994 tap->txa_tid); 2995 2996 /* NB: timer already stopped in bar_tx_complete */ 2997 tap->txa_start = tap->txa_seqpending; 2998 tap->txa_flags &= ~IEEE80211_AGGR_BARPEND; 2999 } 3000 } 3001 3002 /* 3003 * Transmit a BAR frame to the specified node. The 3004 * BAR contents are drawn from the supplied aggregation 3005 * state associated with the node. 3006 * 3007 * NB: we only handle immediate ACK w/ compressed bitmap. 3008 */ 3009 int 3010 ieee80211_send_bar(struct ieee80211_node *ni, 3011 struct ieee80211_tx_ampdu *tap, ieee80211_seq seq) 3012 { 3013 #define senderr(_x, _v) do { vap->iv_stats._v++; ret = _x; goto bad; } while (0) 3014 struct ieee80211vap *vap = ni->ni_vap; 3015 struct ieee80211com *ic = ni->ni_ic; 3016 struct ieee80211_frame_bar *bar; 3017 struct mbuf *m; 3018 uint16_t barctl, barseqctl; 3019 uint8_t *frm; 3020 int tid, ret; 3021 3022 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N, 3023 tap->txa_ni, 3024 "%s: called", 3025 __func__); 3026 3027 if ((tap->txa_flags & IEEE80211_AGGR_RUNNING) == 0) { 3028 /* no ADDBA response, should not happen */ 3029 /* XXX stat+msg */ 3030 return EINVAL; 3031 } 3032 /* XXX locking */ 3033 bar_stop_timer(tap); 3034 3035 ieee80211_ref_node(ni); 3036 3037 m = ieee80211_getmgtframe(&frm, ic->ic_headroom, sizeof(*bar)); 3038 if (m == NULL) 3039 senderr(ENOMEM, is_tx_nobuf); 3040 3041 if (!ieee80211_add_callback(m, bar_tx_complete, tap)) { 3042 m_freem(m); 3043 senderr(ENOMEM, is_tx_nobuf); /* XXX */ 3044 /* NOTREACHED */ 3045 } 3046 3047 bar = mtod(m, struct ieee80211_frame_bar *); 3048 bar->i_fc[0] = IEEE80211_FC0_VERSION_0 | 3049 IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_BAR; 3050 bar->i_fc[1] = 0; 3051 IEEE80211_ADDR_COPY(bar->i_ra, ni->ni_macaddr); 3052 IEEE80211_ADDR_COPY(bar->i_ta, vap->iv_myaddr); 3053 3054 tid = tap->txa_tid; 3055 barctl = (tap->txa_flags & IEEE80211_AGGR_IMMEDIATE ? 3056 0 : IEEE80211_BAR_NOACK) 3057 | IEEE80211_BAR_COMP 3058 | _IEEE80211_SHIFTMASK(tid, IEEE80211_BAR_TID) 3059 ; 3060 barseqctl = _IEEE80211_SHIFTMASK(seq, IEEE80211_BAR_SEQ_START); 3061 /* NB: known to have proper alignment */ 3062 bar->i_ctl = htole16(barctl); 3063 bar->i_seq = htole16(barseqctl); 3064 m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_bar); 3065 3066 M_WME_SETAC(m, WME_AC_VO); 3067 3068 IEEE80211_NODE_STAT(ni, tx_mgmt); /* XXX tx_ctl? */ 3069 3070 /* XXX locking */ 3071 /* init/bump attempts counter */ 3072 if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) == 0) 3073 tap->txa_attempts = 1; 3074 else 3075 tap->txa_attempts++; 3076 tap->txa_seqpending = seq; 3077 tap->txa_flags |= IEEE80211_AGGR_BARPEND; 3078 3079 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_11N, 3080 ni, "send BAR: tid %u ctl 0x%x start %u (attempt %d)", 3081 tid, barctl, seq, tap->txa_attempts); 3082 3083 /* 3084 * ic_raw_xmit will free the node reference 3085 * regardless of queue/TX success or failure. 3086 */ 3087 IEEE80211_TX_LOCK(ic); 3088 ret = ieee80211_raw_output(vap, ni, m, NULL); 3089 IEEE80211_TX_UNLOCK(ic); 3090 if (ret != 0) { 3091 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_11N, 3092 ni, "send BAR: failed: (ret = %d)\n", 3093 ret); 3094 /* xmit failed, clear state flag */ 3095 tap->txa_flags &= ~IEEE80211_AGGR_BARPEND; 3096 vap->iv_stats.is_ampdu_bar_tx_fail++; 3097 return ret; 3098 } 3099 /* XXX hack against tx complete happening before timer is started */ 3100 if (tap->txa_flags & IEEE80211_AGGR_BARPEND) 3101 bar_start_timer(tap); 3102 return 0; 3103 bad: 3104 IEEE80211_NOTE(tap->txa_ni->ni_vap, IEEE80211_MSG_11N, 3105 tap->txa_ni, 3106 "%s: bad! ret=%d", 3107 __func__, ret); 3108 vap->iv_stats.is_ampdu_bar_tx_fail++; 3109 ieee80211_free_node(ni); 3110 return ret; 3111 #undef senderr 3112 } 3113 3114 static int 3115 ht_action_output(struct ieee80211_node *ni, struct mbuf *m) 3116 { 3117 struct ieee80211_bpf_params params; 3118 3119 memset(¶ms, 0, sizeof(params)); 3120 params.ibp_pri = WME_AC_VO; 3121 params.ibp_rate0 = ni->ni_txparms->mgmtrate; 3122 /* NB: we know all frames are unicast */ 3123 params.ibp_try0 = ni->ni_txparms->maxretry; 3124 params.ibp_power = ni->ni_txpower; 3125 return ieee80211_mgmt_output(ni, m, IEEE80211_FC0_SUBTYPE_ACTION, 3126 ¶ms); 3127 } 3128 3129 #define ADDSHORT(frm, v) do { \ 3130 frm[0] = (v) & 0xff; \ 3131 frm[1] = (v) >> 8; \ 3132 frm += 2; \ 3133 } while (0) 3134 3135 /* 3136 * Send an action management frame. The arguments are stuff 3137 * into a frame without inspection; the caller is assumed to 3138 * prepare them carefully (e.g. based on the aggregation state). 3139 */ 3140 static int 3141 ht_send_action_ba_addba(struct ieee80211_node *ni, 3142 int category, int action, void *arg0) 3143 { 3144 struct ieee80211vap *vap = ni->ni_vap; 3145 struct ieee80211com *ic = ni->ni_ic; 3146 uint16_t *args = arg0; 3147 struct mbuf *m; 3148 uint8_t *frm; 3149 3150 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 3151 "send ADDBA %s: dialogtoken %d status %d " 3152 "baparamset 0x%x (tid %d amsdu %d) batimeout 0x%x baseqctl 0x%x", 3153 (action == IEEE80211_ACTION_BA_ADDBA_REQUEST) ? 3154 "request" : "response", args[0], args[1], args[2], 3155 _IEEE80211_MASKSHIFT(args[2], IEEE80211_BAPS_TID), 3156 _IEEE80211_MASKSHIFT(args[2], IEEE80211_BAPS_AMSDU), 3157 args[3], args[4]); 3158 3159 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 3160 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 3161 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 3162 ieee80211_ref_node(ni); 3163 3164 m = ieee80211_getmgtframe(&frm, 3165 ic->ic_headroom + sizeof(struct ieee80211_frame), 3166 sizeof(uint16_t) /* action+category */ 3167 /* XXX may action payload */ 3168 + sizeof(struct ieee80211_action_ba_addbaresponse) 3169 ); 3170 if (m != NULL) { 3171 *frm++ = category; 3172 *frm++ = action; 3173 *frm++ = args[0]; /* dialog token */ 3174 if (action == IEEE80211_ACTION_BA_ADDBA_RESPONSE) 3175 ADDSHORT(frm, args[1]); /* status code */ 3176 ADDSHORT(frm, args[2]); /* baparamset */ 3177 ADDSHORT(frm, args[3]); /* batimeout */ 3178 if (action == IEEE80211_ACTION_BA_ADDBA_REQUEST) 3179 ADDSHORT(frm, args[4]); /* baseqctl */ 3180 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 3181 return ht_action_output(ni, m); 3182 } else { 3183 vap->iv_stats.is_tx_nobuf++; 3184 ieee80211_free_node(ni); 3185 return ENOMEM; 3186 } 3187 } 3188 3189 static int 3190 ht_send_action_ba_delba(struct ieee80211_node *ni, 3191 int category, int action, void *arg0) 3192 { 3193 struct ieee80211vap *vap = ni->ni_vap; 3194 struct ieee80211com *ic = ni->ni_ic; 3195 uint16_t *args = arg0; 3196 struct mbuf *m; 3197 uint16_t baparamset; 3198 uint8_t *frm; 3199 3200 baparamset = _IEEE80211_SHIFTMASK(args[0], IEEE80211_DELBAPS_TID) 3201 | args[1] 3202 ; 3203 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 3204 "send DELBA action: tid %d, initiator %d reason %d (%s)", 3205 args[0], args[1], args[2], ieee80211_reason_to_string(args[2])); 3206 3207 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 3208 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 3209 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 3210 ieee80211_ref_node(ni); 3211 3212 m = ieee80211_getmgtframe(&frm, 3213 ic->ic_headroom + sizeof(struct ieee80211_frame), 3214 sizeof(uint16_t) /* action+category */ 3215 /* XXX may action payload */ 3216 + sizeof(struct ieee80211_action_ba_addbaresponse) 3217 ); 3218 if (m != NULL) { 3219 *frm++ = category; 3220 *frm++ = action; 3221 ADDSHORT(frm, baparamset); 3222 ADDSHORT(frm, args[2]); /* reason code */ 3223 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 3224 return ht_action_output(ni, m); 3225 } else { 3226 vap->iv_stats.is_tx_nobuf++; 3227 ieee80211_free_node(ni); 3228 return ENOMEM; 3229 } 3230 } 3231 3232 static int 3233 ht_send_action_ht_txchwidth(struct ieee80211_node *ni, 3234 int category, int action, void *arg0) 3235 { 3236 struct ieee80211vap *vap = ni->ni_vap; 3237 struct ieee80211com *ic = ni->ni_ic; 3238 struct mbuf *m; 3239 uint8_t *frm; 3240 3241 IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 3242 "send HT txchwidth: width %d", 3243 IEEE80211_IS_CHAN_HT40(ni->ni_chan) ? 40 : 20); 3244 3245 IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 3246 "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 3247 ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 3248 ieee80211_ref_node(ni); 3249 3250 m = ieee80211_getmgtframe(&frm, 3251 ic->ic_headroom + sizeof(struct ieee80211_frame), 3252 sizeof(uint16_t) /* action+category */ 3253 /* XXX may action payload */ 3254 + sizeof(struct ieee80211_action_ba_addbaresponse) 3255 ); 3256 if (m != NULL) { 3257 *frm++ = category; 3258 *frm++ = action; 3259 *frm++ = IEEE80211_IS_CHAN_HT40(ni->ni_chan) ? 3260 IEEE80211_A_HT_TXCHWIDTH_2040 : 3261 IEEE80211_A_HT_TXCHWIDTH_20; 3262 m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 3263 return ht_action_output(ni, m); 3264 } else { 3265 vap->iv_stats.is_tx_nobuf++; 3266 ieee80211_free_node(ni); 3267 return ENOMEM; 3268 } 3269 } 3270 #undef ADDSHORT 3271 3272 /* 3273 * Construct the MCS bit mask for inclusion in an HT capabilities 3274 * information element. 3275 */ 3276 static void 3277 ieee80211_set_mcsset(struct ieee80211com *ic, uint8_t *frm) 3278 { 3279 int i; 3280 uint8_t txparams; 3281 3282 KASSERT((ic->ic_rxstream > 0 && ic->ic_rxstream <= 4), 3283 ("ic_rxstream %d out of range", ic->ic_rxstream)); 3284 KASSERT((ic->ic_txstream > 0 && ic->ic_txstream <= 4), 3285 ("ic_txstream %d out of range", ic->ic_txstream)); 3286 3287 for (i = 0; i < ic->ic_rxstream * 8; i++) 3288 setbit(frm, i); 3289 if ((ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40) && 3290 (ic->ic_htcaps & IEEE80211_HTC_RXMCS32)) 3291 setbit(frm, 32); 3292 if (ic->ic_htcaps & IEEE80211_HTC_RXUNEQUAL) { 3293 if (ic->ic_rxstream >= 2) { 3294 for (i = 33; i <= 38; i++) 3295 setbit(frm, i); 3296 } 3297 if (ic->ic_rxstream >= 3) { 3298 for (i = 39; i <= 52; i++) 3299 setbit(frm, i); 3300 } 3301 if (ic->ic_rxstream >= 4) { 3302 for (i = 53; i <= 76; i++) 3303 setbit(frm, i); 3304 } 3305 } 3306 3307 txparams = 0x1; /* TX MCS set defined */ 3308 if (ic->ic_rxstream != ic->ic_txstream) { 3309 txparams |= 0x2; /* TX RX MCS not equal */ 3310 txparams |= (ic->ic_txstream - 1) << 2; /* num TX streams */ 3311 if (ic->ic_htcaps & IEEE80211_HTC_TXUNEQUAL) 3312 txparams |= 0x16; /* TX unequal modulation sup */ 3313 } 3314 3315 frm[12] = txparams; 3316 } 3317 3318 /* 3319 * Add body of an HTCAP information element. 3320 */ 3321 static uint8_t * 3322 ieee80211_add_htcap_body(uint8_t *frm, struct ieee80211_node *ni) 3323 { 3324 #define ADDSHORT(frm, v) do { \ 3325 frm[0] = (v) & 0xff; \ 3326 frm[1] = (v) >> 8; \ 3327 frm += 2; \ 3328 } while (0) 3329 struct ieee80211com *ic = ni->ni_ic; 3330 struct ieee80211vap *vap = ni->ni_vap; 3331 uint16_t caps, extcaps; 3332 int rxmax, density; 3333 3334 /* HT capabilities */ 3335 caps = vap->iv_htcaps & 0xffff; 3336 /* 3337 * Note channel width depends on whether we are operating as 3338 * a sta or not. When operating as a sta we are generating 3339 * a request based on our desired configuration. Otherwise 3340 * we are operational and the channel attributes identify 3341 * how we've been setup (which might be different if a fixed 3342 * channel is specified). 3343 */ 3344 if (vap->iv_opmode == IEEE80211_M_STA) { 3345 /* override 20/40 use based on config */ 3346 if (vap->iv_flags_ht & IEEE80211_FHT_USEHT40) 3347 caps |= IEEE80211_HTCAP_CHWIDTH40; 3348 else 3349 caps &= ~IEEE80211_HTCAP_CHWIDTH40; 3350 3351 /* Start by using the advertised settings */ 3352 rxmax = _IEEE80211_MASKSHIFT(ni->ni_htparam, 3353 IEEE80211_HTCAP_MAXRXAMPDU); 3354 density = _IEEE80211_MASKSHIFT(ni->ni_htparam, 3355 IEEE80211_HTCAP_MPDUDENSITY); 3356 3357 IEEE80211_DPRINTF(vap, IEEE80211_MSG_11N, 3358 "%s: advertised rxmax=%d, density=%d, vap rxmax=%d, density=%d\n", 3359 __func__, 3360 rxmax, 3361 density, 3362 vap->iv_ampdu_rxmax, 3363 vap->iv_ampdu_density); 3364 3365 /* Cap at VAP rxmax */ 3366 if (rxmax > vap->iv_ampdu_rxmax) 3367 rxmax = vap->iv_ampdu_rxmax; 3368 3369 /* 3370 * If the VAP ampdu density value greater, use that. 3371 * 3372 * (Larger density value == larger minimum gap between A-MPDU 3373 * subframes.) 3374 */ 3375 if (vap->iv_ampdu_density > density) 3376 density = vap->iv_ampdu_density; 3377 3378 /* 3379 * NB: Hardware might support HT40 on some but not all 3380 * channels. We can't determine this earlier because only 3381 * after association the channel is upgraded to HT based 3382 * on the negotiated capabilities. 3383 */ 3384 if (ni->ni_chan != IEEE80211_CHAN_ANYC && 3385 findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT40U) == NULL && 3386 findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT40D) == NULL) 3387 caps &= ~IEEE80211_HTCAP_CHWIDTH40; 3388 } else { 3389 /* override 20/40 use based on current channel */ 3390 if (IEEE80211_IS_CHAN_HT40(ni->ni_chan)) 3391 caps |= IEEE80211_HTCAP_CHWIDTH40; 3392 else 3393 caps &= ~IEEE80211_HTCAP_CHWIDTH40; 3394 3395 /* XXX TODO should it start by using advertised settings? */ 3396 rxmax = vap->iv_ampdu_rxmax; 3397 density = vap->iv_ampdu_density; 3398 } 3399 3400 /* adjust short GI based on channel and config */ 3401 if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20) == 0) 3402 caps &= ~IEEE80211_HTCAP_SHORTGI20; 3403 if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40) == 0 || 3404 (caps & IEEE80211_HTCAP_CHWIDTH40) == 0) 3405 caps &= ~IEEE80211_HTCAP_SHORTGI40; 3406 3407 /* adjust STBC based on receive capabilities */ 3408 if ((vap->iv_flags_ht & IEEE80211_FHT_STBC_RX) == 0) 3409 caps &= ~IEEE80211_HTCAP_RXSTBC; 3410 3411 /* adjust LDPC based on receive capabilites */ 3412 if ((vap->iv_flags_ht & IEEE80211_FHT_LDPC_RX) == 0) 3413 caps &= ~IEEE80211_HTCAP_LDPC; 3414 3415 ADDSHORT(frm, caps); 3416 3417 /* HT parameters */ 3418 *frm = _IEEE80211_SHIFTMASK(rxmax, IEEE80211_HTCAP_MAXRXAMPDU) 3419 | _IEEE80211_SHIFTMASK(density, IEEE80211_HTCAP_MPDUDENSITY) 3420 ; 3421 frm++; 3422 3423 /* pre-zero remainder of ie */ 3424 memset(frm, 0, sizeof(struct ieee80211_ie_htcap) - 3425 __offsetof(struct ieee80211_ie_htcap, hc_mcsset)); 3426 3427 /* supported MCS set */ 3428 /* 3429 * XXX: For sta mode the rate set should be restricted based 3430 * on the AP's capabilities, but ni_htrates isn't setup when 3431 * we're called to form an AssocReq frame so for now we're 3432 * restricted to the device capabilities. 3433 */ 3434 ieee80211_set_mcsset(ni->ni_ic, frm); 3435 3436 frm += __offsetof(struct ieee80211_ie_htcap, hc_extcap) - 3437 __offsetof(struct ieee80211_ie_htcap, hc_mcsset); 3438 3439 /* HT extended capabilities */ 3440 extcaps = vap->iv_htextcaps & 0xffff; 3441 3442 ADDSHORT(frm, extcaps); 3443 3444 frm += sizeof(struct ieee80211_ie_htcap) - 3445 __offsetof(struct ieee80211_ie_htcap, hc_txbf); 3446 3447 return frm; 3448 #undef ADDSHORT 3449 } 3450 3451 /* 3452 * Add 802.11n HT capabilities information element 3453 */ 3454 uint8_t * 3455 ieee80211_add_htcap(uint8_t *frm, struct ieee80211_node *ni) 3456 { 3457 frm[0] = IEEE80211_ELEMID_HTCAP; 3458 frm[1] = sizeof(struct ieee80211_ie_htcap) - 2; 3459 return ieee80211_add_htcap_body(frm + 2, ni); 3460 } 3461 3462 /* 3463 * Non-associated probe request - add HT capabilities based on 3464 * the current channel configuration. 3465 */ 3466 static uint8_t * 3467 ieee80211_add_htcap_body_ch(uint8_t *frm, struct ieee80211vap *vap, 3468 struct ieee80211_channel *c) 3469 { 3470 #define ADDSHORT(frm, v) do { \ 3471 frm[0] = (v) & 0xff; \ 3472 frm[1] = (v) >> 8; \ 3473 frm += 2; \ 3474 } while (0) 3475 struct ieee80211com *ic = vap->iv_ic; 3476 uint16_t caps, extcaps; 3477 int rxmax, density; 3478 3479 /* HT capabilities */ 3480 caps = vap->iv_htcaps & 0xffff; 3481 3482 /* 3483 * We don't use this in STA mode; only in IBSS mode. 3484 * So in IBSS mode we base our HTCAP flags on the 3485 * given channel. 3486 */ 3487 3488 /* override 20/40 use based on current channel */ 3489 if (IEEE80211_IS_CHAN_HT40(c)) 3490 caps |= IEEE80211_HTCAP_CHWIDTH40; 3491 else 3492 caps &= ~IEEE80211_HTCAP_CHWIDTH40; 3493 3494 /* Use the currently configured values */ 3495 rxmax = vap->iv_ampdu_rxmax; 3496 density = vap->iv_ampdu_density; 3497 3498 /* adjust short GI based on channel and config */ 3499 if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20) == 0) 3500 caps &= ~IEEE80211_HTCAP_SHORTGI20; 3501 if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40) == 0 || 3502 (caps & IEEE80211_HTCAP_CHWIDTH40) == 0) 3503 caps &= ~IEEE80211_HTCAP_SHORTGI40; 3504 ADDSHORT(frm, caps); 3505 3506 /* HT parameters */ 3507 *frm = _IEEE80211_SHIFTMASK(rxmax, IEEE80211_HTCAP_MAXRXAMPDU) 3508 | _IEEE80211_SHIFTMASK(density, IEEE80211_HTCAP_MPDUDENSITY) 3509 ; 3510 frm++; 3511 3512 /* pre-zero remainder of ie */ 3513 memset(frm, 0, sizeof(struct ieee80211_ie_htcap) - 3514 __offsetof(struct ieee80211_ie_htcap, hc_mcsset)); 3515 3516 /* supported MCS set */ 3517 /* 3518 * XXX: For sta mode the rate set should be restricted based 3519 * on the AP's capabilities, but ni_htrates isn't setup when 3520 * we're called to form an AssocReq frame so for now we're 3521 * restricted to the device capabilities. 3522 */ 3523 ieee80211_set_mcsset(ic, frm); 3524 3525 frm += __offsetof(struct ieee80211_ie_htcap, hc_extcap) - 3526 __offsetof(struct ieee80211_ie_htcap, hc_mcsset); 3527 3528 /* HT extended capabilities */ 3529 extcaps = vap->iv_htextcaps & 0xffff; 3530 3531 ADDSHORT(frm, extcaps); 3532 3533 frm += sizeof(struct ieee80211_ie_htcap) - 3534 __offsetof(struct ieee80211_ie_htcap, hc_txbf); 3535 3536 return frm; 3537 #undef ADDSHORT 3538 } 3539 3540 /* 3541 * Add 802.11n HT capabilities information element 3542 */ 3543 uint8_t * 3544 ieee80211_add_htcap_ch(uint8_t *frm, struct ieee80211vap *vap, 3545 struct ieee80211_channel *c) 3546 { 3547 frm[0] = IEEE80211_ELEMID_HTCAP; 3548 frm[1] = sizeof(struct ieee80211_ie_htcap) - 2; 3549 return ieee80211_add_htcap_body_ch(frm + 2, vap, c); 3550 } 3551 3552 /* 3553 * Add Broadcom OUI wrapped standard HTCAP ie; this is 3554 * used for compatibility w/ pre-draft implementations. 3555 */ 3556 uint8_t * 3557 ieee80211_add_htcap_vendor(uint8_t *frm, struct ieee80211_node *ni) 3558 { 3559 frm[0] = IEEE80211_ELEMID_VENDOR; 3560 frm[1] = 4 + sizeof(struct ieee80211_ie_htcap) - 2; 3561 frm[2] = (BCM_OUI >> 0) & 0xff; 3562 frm[3] = (BCM_OUI >> 8) & 0xff; 3563 frm[4] = (BCM_OUI >> 16) & 0xff; 3564 frm[5] = BCM_OUI_HTCAP; 3565 return ieee80211_add_htcap_body(frm + 6, ni); 3566 } 3567 3568 /* 3569 * Construct the MCS bit mask of basic rates 3570 * for inclusion in an HT information element. 3571 */ 3572 static void 3573 ieee80211_set_basic_htrates(uint8_t *frm, const struct ieee80211_htrateset *rs) 3574 { 3575 int i; 3576 3577 for (i = 0; i < rs->rs_nrates; i++) { 3578 int r = rs->rs_rates[i] & IEEE80211_RATE_VAL; 3579 if ((rs->rs_rates[i] & IEEE80211_RATE_BASIC) && 3580 r < IEEE80211_HTRATE_MAXSIZE) { 3581 /* NB: this assumes a particular implementation */ 3582 setbit(frm, r); 3583 } 3584 } 3585 } 3586 3587 /* 3588 * Update the HTINFO ie for a beacon frame. 3589 */ 3590 void 3591 ieee80211_ht_update_beacon(struct ieee80211vap *vap, 3592 struct ieee80211_beacon_offsets *bo) 3593 { 3594 #define PROTMODE (IEEE80211_HTINFO_OPMODE|IEEE80211_HTINFO_NONHT_PRESENT) 3595 struct ieee80211_node *ni; 3596 const struct ieee80211_channel *bsschan; 3597 struct ieee80211com *ic = vap->iv_ic; 3598 struct ieee80211_ie_htinfo *ht = 3599 (struct ieee80211_ie_htinfo *) bo->bo_htinfo; 3600 3601 ni = ieee80211_ref_node(vap->iv_bss); 3602 bsschan = ni->ni_chan; 3603 3604 /* XXX only update on channel change */ 3605 ht->hi_ctrlchannel = ieee80211_chan2ieee(ic, bsschan); 3606 if (vap->iv_flags_ht & IEEE80211_FHT_RIFS) 3607 ht->hi_byte1 = IEEE80211_HTINFO_RIFSMODE_PERM; 3608 else 3609 ht->hi_byte1 = IEEE80211_HTINFO_RIFSMODE_PROH; 3610 if (IEEE80211_IS_CHAN_HT40U(bsschan)) 3611 ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_ABOVE; 3612 else if (IEEE80211_IS_CHAN_HT40D(bsschan)) 3613 ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_BELOW; 3614 else 3615 ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_NONE; 3616 if (IEEE80211_IS_CHAN_HT40(bsschan)) 3617 ht->hi_byte1 |= IEEE80211_HTINFO_TXWIDTH_2040; 3618 3619 /* protection mode */ 3620 /* 3621 * XXX TODO: this uses the global flag, not the per-VAP flag. 3622 * Eventually (once the protection modes are done per-channel 3623 * rather than per-VAP) we can flip this over to be per-VAP but 3624 * using the channel protection mode. 3625 */ 3626 ht->hi_byte2 = (ht->hi_byte2 &~ PROTMODE) | ic->ic_curhtprotmode; 3627 3628 ieee80211_free_node(ni); 3629 3630 /* XXX propagate to vendor ie's */ 3631 #undef PROTMODE 3632 } 3633 3634 /* 3635 * Add body of an HTINFO information element. 3636 * 3637 * NB: We don't use struct ieee80211_ie_htinfo because we can 3638 * be called to fillin both a standard ie and a compat ie that 3639 * has a vendor OUI at the front. 3640 */ 3641 static uint8_t * 3642 ieee80211_add_htinfo_body(uint8_t *frm, struct ieee80211_node *ni) 3643 { 3644 struct ieee80211vap *vap = ni->ni_vap; 3645 struct ieee80211com *ic = ni->ni_ic; 3646 3647 /* pre-zero remainder of ie */ 3648 memset(frm, 0, sizeof(struct ieee80211_ie_htinfo) - 2); 3649 3650 /* primary/control channel center */ 3651 *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan); 3652 3653 if (vap->iv_flags_ht & IEEE80211_FHT_RIFS) 3654 frm[0] = IEEE80211_HTINFO_RIFSMODE_PERM; 3655 else 3656 frm[0] = IEEE80211_HTINFO_RIFSMODE_PROH; 3657 if (IEEE80211_IS_CHAN_HT40U(ni->ni_chan)) 3658 frm[0] |= IEEE80211_HTINFO_2NDCHAN_ABOVE; 3659 else if (IEEE80211_IS_CHAN_HT40D(ni->ni_chan)) 3660 frm[0] |= IEEE80211_HTINFO_2NDCHAN_BELOW; 3661 else 3662 frm[0] |= IEEE80211_HTINFO_2NDCHAN_NONE; 3663 if (IEEE80211_IS_CHAN_HT40(ni->ni_chan)) 3664 frm[0] |= IEEE80211_HTINFO_TXWIDTH_2040; 3665 3666 /* 3667 * Add current protection mode. Unlike for beacons, 3668 * this will respect the per-VAP flags. 3669 */ 3670 frm[1] = vap->iv_curhtprotmode; 3671 3672 frm += 5; 3673 3674 /* basic MCS set */ 3675 ieee80211_set_basic_htrates(frm, &ni->ni_htrates); 3676 frm += sizeof(struct ieee80211_ie_htinfo) - 3677 __offsetof(struct ieee80211_ie_htinfo, hi_basicmcsset); 3678 return frm; 3679 } 3680 3681 /* 3682 * Add 802.11n HT information element. 3683 */ 3684 uint8_t * 3685 ieee80211_add_htinfo(uint8_t *frm, struct ieee80211_node *ni) 3686 { 3687 frm[0] = IEEE80211_ELEMID_HTINFO; 3688 frm[1] = sizeof(struct ieee80211_ie_htinfo) - 2; 3689 return ieee80211_add_htinfo_body(frm + 2, ni); 3690 } 3691 3692 /* 3693 * Add Broadcom OUI wrapped standard HTINFO ie; this is 3694 * used for compatibility w/ pre-draft implementations. 3695 */ 3696 uint8_t * 3697 ieee80211_add_htinfo_vendor(uint8_t *frm, struct ieee80211_node *ni) 3698 { 3699 frm[0] = IEEE80211_ELEMID_VENDOR; 3700 frm[1] = 4 + sizeof(struct ieee80211_ie_htinfo) - 2; 3701 frm[2] = (BCM_OUI >> 0) & 0xff; 3702 frm[3] = (BCM_OUI >> 8) & 0xff; 3703 frm[4] = (BCM_OUI >> 16) & 0xff; 3704 frm[5] = BCM_OUI_HTINFO; 3705 return ieee80211_add_htinfo_body(frm + 6, ni); 3706 } 3707 3708 /* 3709 * Get the HT density for the given 802.11n node. 3710 * 3711 * Take into account the density advertised from the peer. 3712 * Larger values are longer A-MPDU density spacing values, and 3713 * we want to obey them per station if we get them. 3714 */ 3715 int 3716 ieee80211_ht_get_node_ampdu_density(const struct ieee80211_node *ni) 3717 { 3718 struct ieee80211vap *vap; 3719 int peer_mpdudensity; 3720 3721 vap = ni->ni_vap; 3722 peer_mpdudensity = 3723 _IEEE80211_MASKSHIFT(ni->ni_htparam, IEEE80211_HTCAP_MPDUDENSITY); 3724 if (vap->iv_ampdu_density > peer_mpdudensity) 3725 peer_mpdudensity = vap->iv_ampdu_density; 3726 return (peer_mpdudensity); 3727 } 3728 3729 /* 3730 * Get the transmit A-MPDU limit for the given 802.11n node. 3731 * 3732 * Take into account the limit advertised from the peer. 3733 * Smaller values indicate smaller maximum A-MPDU sizes, and 3734 * should be used when forming an A-MPDU to the given peer. 3735 */ 3736 int 3737 ieee80211_ht_get_node_ampdu_limit(const struct ieee80211_node *ni) 3738 { 3739 struct ieee80211vap *vap; 3740 int peer_mpdulimit; 3741 3742 vap = ni->ni_vap; 3743 peer_mpdulimit = 3744 _IEEE80211_MASKSHIFT(ni->ni_htparam, IEEE80211_HTCAP_MAXRXAMPDU); 3745 3746 return (MIN(vap->iv_ampdu_limit, peer_mpdulimit)); 3747 } 3748 3749 /* 3750 * Return true if short-GI is available when transmitting to 3751 * the given node at 20MHz. 3752 * 3753 * Ensure it's configured and available in the VAP / driver as 3754 * well as the node. 3755 */ 3756 bool 3757 ieee80211_ht_check_tx_shortgi_20(const struct ieee80211_node *ni) 3758 { 3759 const struct ieee80211vap *vap; 3760 const struct ieee80211com *ic; 3761 3762 if (! ieee80211_ht_check_tx_ht(ni)) 3763 return (false); 3764 3765 vap = ni->ni_vap; 3766 ic = ni->ni_ic; 3767 3768 return ((ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI20) && 3769 (ni->ni_htcap & IEEE80211_HTCAP_SHORTGI20) && 3770 (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20)); 3771 } 3772 3773 /* 3774 * Return true if short-GI is available when transmitting to 3775 * the given node at 40MHz. 3776 * 3777 * Ensure it's configured and available in the VAP / driver as 3778 * well as the node and BSS. 3779 */ 3780 bool 3781 ieee80211_ht_check_tx_shortgi_40(const struct ieee80211_node *ni) 3782 { 3783 const struct ieee80211vap *vap; 3784 const struct ieee80211com *ic; 3785 3786 if (! ieee80211_ht_check_tx_ht40(ni)) 3787 return (false); 3788 3789 vap = ni->ni_vap; 3790 ic = ni->ni_ic; 3791 3792 return ((ic->ic_htcaps & IEEE80211_HTCAP_SHORTGI40) && 3793 (ni->ni_htcap & IEEE80211_HTCAP_SHORTGI40) && 3794 (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40)); 3795 } 3796 3797 /* 3798 * Return true if HT rates can be used for the given node. 3799 * 3800 * There are some situations seen in the wild, wild past where 3801 * HT APs would announce HT but no HT rates. 3802 */ 3803 bool 3804 ieee80211_ht_check_tx_ht(const struct ieee80211_node *ni) 3805 { 3806 const struct ieee80211vap *vap; 3807 const struct ieee80211_channel *bss_chan; 3808 3809 if (ni == NULL || ni->ni_chan == IEEE80211_CHAN_ANYC || 3810 ni->ni_vap == NULL || ni->ni_vap->iv_bss == NULL) 3811 return (false); 3812 3813 vap = ni->ni_vap; 3814 bss_chan = vap->iv_bss->ni_chan; 3815 3816 if (bss_chan == IEEE80211_CHAN_ANYC) 3817 return (false); 3818 3819 if (IEEE80211_IS_CHAN_HT(ni->ni_chan) && 3820 ni->ni_htrates.rs_nrates == 0) 3821 return (false); 3822 return (IEEE80211_IS_CHAN_HT(ni->ni_chan)); 3823 } 3824 3825 /* 3826 * Return true if HT40 rates can be transmitted to the given node. 3827 * 3828 * This verifies that the BSS is HT40 capable and the current 3829 * node channel width is 40MHz. 3830 */ 3831 bool 3832 ieee80211_ht_check_tx_ht40(const struct ieee80211_node *ni) 3833 { 3834 struct ieee80211vap *vap; 3835 struct ieee80211_channel *bss_chan; 3836 3837 if (! ieee80211_ht_check_tx_ht(ni)) 3838 return (false); 3839 3840 vap = ni->ni_vap; 3841 bss_chan = vap->iv_bss->ni_chan; 3842 3843 return (IEEE80211_IS_CHAN_HT40(bss_chan) && 3844 IEEE80211_IS_CHAN_HT40(ni->ni_chan) && 3845 (ni->ni_chw == NET80211_STA_RX_BW_40)); 3846 } 3847