ieee80211_ht.c revision 205513
1170530Ssam/*- 2178354Ssam * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting 3170530Ssam * All rights reserved. 4170530Ssam * 5170530Ssam * Redistribution and use in source and binary forms, with or without 6170530Ssam * modification, are permitted provided that the following conditions 7170530Ssam * are met: 8170530Ssam * 1. Redistributions of source code must retain the above copyright 9170530Ssam * notice, this list of conditions and the following disclaimer. 10170530Ssam * 2. Redistributions in binary form must reproduce the above copyright 11170530Ssam * notice, this list of conditions and the following disclaimer in the 12170530Ssam * documentation and/or other materials provided with the distribution. 13170530Ssam * 14170530Ssam * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15170530Ssam * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16170530Ssam * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17170530Ssam * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18170530Ssam * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19170530Ssam * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20170530Ssam * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21170530Ssam * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22170530Ssam * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23170530Ssam * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24170530Ssam */ 25170530Ssam 26170530Ssam#include <sys/cdefs.h> 27170530Ssam#ifdef __FreeBSD__ 28170530Ssam__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_ht.c 205513 2010-03-23 12:03:09Z rpaulo $"); 29170530Ssam#endif 30170530Ssam 31170530Ssam/* 32170530Ssam * IEEE 802.11n protocol support. 33170530Ssam */ 34170530Ssam 35170530Ssam#include "opt_inet.h" 36178354Ssam#include "opt_wlan.h" 37170530Ssam 38170530Ssam#include <sys/param.h> 39170530Ssam#include <sys/kernel.h> 40170530Ssam#include <sys/systm.h> 41170530Ssam#include <sys/endian.h> 42170530Ssam 43170530Ssam#include <sys/socket.h> 44170530Ssam 45170530Ssam#include <net/if.h> 46170530Ssam#include <net/if_media.h> 47170530Ssam#include <net/ethernet.h> 48170530Ssam 49170530Ssam#include <net80211/ieee80211_var.h> 50195377Ssam#include <net80211/ieee80211_action.h> 51178354Ssam#include <net80211/ieee80211_input.h> 52170530Ssam 53170530Ssam/* define here, used throughout file */ 54170530Ssam#define MS(_v, _f) (((_v) & _f) >> _f##_S) 55170530Ssam#define SM(_v, _f) (((_v) << _f##_S) & _f) 56170530Ssam 57178354Ssamconst struct ieee80211_mcs_rates ieee80211_htrates[16] = { 58205277Srpaulo /* 20Mhz SGI 40Mhz SGI */ 59178354Ssam { 13, 14, 27, 30 }, /* MCS 0 */ 60178354Ssam { 26, 29, 54, 60 }, /* MCS 1 */ 61178354Ssam { 39, 43, 81, 90 }, /* MCS 2 */ 62178354Ssam { 52, 58, 108, 120 }, /* MCS 3 */ 63178354Ssam { 78, 87, 162, 180 }, /* MCS 4 */ 64178354Ssam { 104, 116, 216, 240 }, /* MCS 5 */ 65178354Ssam { 117, 130, 243, 270 }, /* MCS 6 */ 66178354Ssam { 130, 144, 270, 300 }, /* MCS 7 */ 67178354Ssam { 26, 29, 54, 60 }, /* MCS 8 */ 68178354Ssam { 52, 58, 108, 120 }, /* MCS 9 */ 69178354Ssam { 78, 87, 162, 180 }, /* MCS 10 */ 70178354Ssam { 104, 116, 216, 240 }, /* MCS 11 */ 71178354Ssam { 156, 173, 324, 360 }, /* MCS 12 */ 72178354Ssam { 208, 231, 432, 480 }, /* MCS 13 */ 73178354Ssam { 234, 260, 486, 540 }, /* MCS 14 */ 74178354Ssam { 260, 289, 540, 600 } /* MCS 15 */ 75170530Ssam}; 76170530Ssam 77170530Ssamstatic const struct ieee80211_htrateset ieee80211_rateset_11n = 78170530Ssam { 16, { 79170530Ssam 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 80170530Ssam 10, 11, 12, 13, 14, 15 } 81170530Ssam }; 82170530Ssam 83173273Ssam#ifdef IEEE80211_AMPDU_AGE 84193115Ssamstatic int ieee80211_ampdu_age = -1; /* threshold for ampdu reorder q (ms) */ 85193115SsamSYSCTL_PROC(_net_wlan, OID_AUTO, ampdu_age, CTLTYPE_INT | CTLFLAG_RW, 86193115Ssam &ieee80211_ampdu_age, 0, ieee80211_sysctl_msecs_ticks, "I", 87193115Ssam "AMPDU max reorder age (ms)"); 88173273Ssam#endif 89173273Ssam 90193115Ssamstatic int ieee80211_recv_bar_ena = 1; 91193115SsamSYSCTL_INT(_net_wlan, OID_AUTO, recv_bar, CTLFLAG_RW, &ieee80211_recv_bar_ena, 92193115Ssam 0, "BAR frame processing (ena/dis)"); 93193115Ssam 94193115Ssamstatic int ieee80211_addba_timeout = -1;/* timeout for ADDBA response */ 95193115SsamSYSCTL_PROC(_net_wlan, OID_AUTO, addba_timeout, CTLTYPE_INT | CTLFLAG_RW, 96193115Ssam &ieee80211_addba_timeout, 0, ieee80211_sysctl_msecs_ticks, "I", 97193115Ssam "ADDBA request timeout (ms)"); 98193115Ssamstatic int ieee80211_addba_backoff = -1;/* backoff after max ADDBA requests */ 99193115SsamSYSCTL_PROC(_net_wlan, OID_AUTO, addba_backoff, CTLTYPE_INT | CTLFLAG_RW, 100193115Ssam &ieee80211_addba_backoff, 0, ieee80211_sysctl_msecs_ticks, "I", 101193115Ssam "ADDBA request backoff (ms)"); 102193115Ssamstatic int ieee80211_addba_maxtries = 3;/* max ADDBA requests before backoff */ 103193115SsamSYSCTL_INT(_net_wlan, OID_AUTO, addba_maxtries, CTLTYPE_INT | CTLFLAG_RW, 104193115Ssam &ieee80211_addba_maxtries, 0, "max ADDBA requests sent before backoff"); 105193115Ssam 106193115Ssamstatic int ieee80211_bar_timeout = -1; /* timeout waiting for BAR response */ 107193115Ssamstatic int ieee80211_bar_maxtries = 50;/* max BAR requests before DELBA */ 108193115Ssam 109195377Ssamstatic ieee80211_recv_action_func ht_recv_action_ba_addba_request; 110195377Ssamstatic ieee80211_recv_action_func ht_recv_action_ba_addba_response; 111195377Ssamstatic ieee80211_recv_action_func ht_recv_action_ba_delba; 112195377Ssamstatic ieee80211_recv_action_func ht_recv_action_ht_mimopwrsave; 113195377Ssamstatic ieee80211_recv_action_func ht_recv_action_ht_txchwidth; 114195377Ssam 115195377Ssamstatic ieee80211_send_action_func ht_send_action_ba_addba; 116195377Ssamstatic ieee80211_send_action_func ht_send_action_ba_delba; 117195377Ssamstatic ieee80211_send_action_func ht_send_action_ht_txchwidth; 118195377Ssam 119178354Ssamstatic void 120195377Ssamieee80211_ht_init(void) 121178354Ssam{ 122195377Ssam /* 123195377Ssam * Setup HT parameters that depends on the clock frequency. 124195377Ssam */ 125178354Ssam#ifdef IEEE80211_AMPDU_AGE 126178354Ssam ieee80211_ampdu_age = msecs_to_ticks(500); 127178354Ssam#endif 128178354Ssam ieee80211_addba_timeout = msecs_to_ticks(250); 129178354Ssam ieee80211_addba_backoff = msecs_to_ticks(10*1000); 130184280Ssam ieee80211_bar_timeout = msecs_to_ticks(250); 131195377Ssam /* 132195377Ssam * Register action frame handlers. 133195377Ssam */ 134195377Ssam ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA, 135195377Ssam IEEE80211_ACTION_BA_ADDBA_REQUEST, ht_recv_action_ba_addba_request); 136195377Ssam ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA, 137195377Ssam IEEE80211_ACTION_BA_ADDBA_RESPONSE, ht_recv_action_ba_addba_response); 138195377Ssam ieee80211_recv_action_register(IEEE80211_ACTION_CAT_BA, 139195377Ssam IEEE80211_ACTION_BA_DELBA, ht_recv_action_ba_delba); 140195377Ssam ieee80211_recv_action_register(IEEE80211_ACTION_CAT_HT, 141195377Ssam IEEE80211_ACTION_HT_MIMOPWRSAVE, ht_recv_action_ht_mimopwrsave); 142195377Ssam ieee80211_recv_action_register(IEEE80211_ACTION_CAT_HT, 143195377Ssam IEEE80211_ACTION_HT_TXCHWIDTH, ht_recv_action_ht_txchwidth); 144195377Ssam 145195377Ssam ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA, 146195377Ssam IEEE80211_ACTION_BA_ADDBA_REQUEST, ht_send_action_ba_addba); 147195377Ssam ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA, 148195377Ssam IEEE80211_ACTION_BA_ADDBA_RESPONSE, ht_send_action_ba_addba); 149195377Ssam ieee80211_send_action_register(IEEE80211_ACTION_CAT_BA, 150195377Ssam IEEE80211_ACTION_BA_DELBA, ht_send_action_ba_delba); 151195377Ssam ieee80211_send_action_register(IEEE80211_ACTION_CAT_HT, 152195377Ssam IEEE80211_ACTION_HT_TXCHWIDTH, ht_send_action_ht_txchwidth); 153178354Ssam} 154195377SsamSYSINIT(wlan_ht, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_ht_init, NULL); 155170530Ssam 156178354Ssamstatic int ieee80211_ampdu_enable(struct ieee80211_node *ni, 157178354Ssam struct ieee80211_tx_ampdu *tap); 158170530Ssamstatic int ieee80211_addba_request(struct ieee80211_node *ni, 159170530Ssam struct ieee80211_tx_ampdu *tap, 160170530Ssam int dialogtoken, int baparamset, int batimeout); 161170530Ssamstatic int ieee80211_addba_response(struct ieee80211_node *ni, 162170530Ssam struct ieee80211_tx_ampdu *tap, 163170530Ssam int code, int baparamset, int batimeout); 164170530Ssamstatic void ieee80211_addba_stop(struct ieee80211_node *ni, 165170530Ssam struct ieee80211_tx_ampdu *tap); 166184280Ssamstatic void ieee80211_bar_response(struct ieee80211_node *ni, 167184280Ssam struct ieee80211_tx_ampdu *tap, int status); 168184280Ssamstatic void ampdu_tx_stop(struct ieee80211_tx_ampdu *tap); 169184280Ssamstatic void bar_stop_timer(struct ieee80211_tx_ampdu *tap); 170191552Ssamstatic int ampdu_rx_start(struct ieee80211_node *, struct ieee80211_rx_ampdu *, 171191552Ssam int baparamset, int batimeout, int baseqctl); 172191552Ssamstatic void ampdu_rx_stop(struct ieee80211_node *, struct ieee80211_rx_ampdu *); 173170530Ssam 174170530Ssamvoid 175170530Ssamieee80211_ht_attach(struct ieee80211com *ic) 176170530Ssam{ 177170530Ssam /* setup default aggregation policy */ 178195377Ssam ic->ic_recv_action = ieee80211_recv_action; 179170530Ssam ic->ic_send_action = ieee80211_send_action; 180178354Ssam ic->ic_ampdu_enable = ieee80211_ampdu_enable; 181170530Ssam ic->ic_addba_request = ieee80211_addba_request; 182170530Ssam ic->ic_addba_response = ieee80211_addba_response; 183170530Ssam ic->ic_addba_stop = ieee80211_addba_stop; 184184280Ssam ic->ic_bar_response = ieee80211_bar_response; 185191552Ssam ic->ic_ampdu_rx_start = ampdu_rx_start; 186191552Ssam ic->ic_ampdu_rx_stop = ampdu_rx_stop; 187170530Ssam 188173273Ssam ic->ic_htprotmode = IEEE80211_PROT_RTSCTS; 189173273Ssam ic->ic_curhtprotmode = IEEE80211_HTINFO_OPMODE_PURE; 190178354Ssam} 191173273Ssam 192178354Ssamvoid 193178354Ssamieee80211_ht_detach(struct ieee80211com *ic) 194178354Ssam{ 195178354Ssam} 196173273Ssam 197178354Ssamvoid 198178354Ssamieee80211_ht_vattach(struct ieee80211vap *vap) 199178354Ssam{ 200178354Ssam 201178354Ssam /* driver can override defaults */ 202178354Ssam vap->iv_ampdu_rxmax = IEEE80211_HTCAP_MAXRXAMPDU_8K; 203178354Ssam vap->iv_ampdu_density = IEEE80211_HTCAP_MPDUDENSITY_NA; 204178354Ssam vap->iv_ampdu_limit = vap->iv_ampdu_rxmax; 205178354Ssam vap->iv_amsdu_limit = vap->iv_htcaps & IEEE80211_HTCAP_MAXAMSDU; 206178354Ssam /* tx aggregation traffic thresholds */ 207178354Ssam vap->iv_ampdu_mintraffic[WME_AC_BK] = 128; 208178354Ssam vap->iv_ampdu_mintraffic[WME_AC_BE] = 64; 209178354Ssam vap->iv_ampdu_mintraffic[WME_AC_VO] = 32; 210178354Ssam vap->iv_ampdu_mintraffic[WME_AC_VI] = 32; 211178354Ssam 212178354Ssam if (vap->iv_htcaps & IEEE80211_HTC_HT) { 213170530Ssam /* 214173273Ssam * Device is HT capable; enable all HT-related 215173273Ssam * facilities by default. 216170530Ssam * XXX these choices may be too aggressive. 217170530Ssam */ 218193655Ssam vap->iv_flags_ht |= IEEE80211_FHT_HT 219193655Ssam | IEEE80211_FHT_HTCOMPAT 220193655Ssam ; 221178354Ssam if (vap->iv_htcaps & IEEE80211_HTCAP_SHORTGI20) 222193655Ssam vap->iv_flags_ht |= IEEE80211_FHT_SHORTGI20; 223173273Ssam /* XXX infer from channel list? */ 224178354Ssam if (vap->iv_htcaps & IEEE80211_HTCAP_CHWIDTH40) { 225193655Ssam vap->iv_flags_ht |= IEEE80211_FHT_USEHT40; 226178354Ssam if (vap->iv_htcaps & IEEE80211_HTCAP_SHORTGI40) 227193655Ssam vap->iv_flags_ht |= IEEE80211_FHT_SHORTGI40; 228170530Ssam } 229183256Ssam /* enable RIFS if capable */ 230183256Ssam if (vap->iv_htcaps & IEEE80211_HTC_RIFS) 231193655Ssam vap->iv_flags_ht |= IEEE80211_FHT_RIFS; 232183256Ssam 233170530Ssam /* NB: A-MPDU and A-MSDU rx are mandated, these are tx only */ 234193655Ssam vap->iv_flags_ht |= IEEE80211_FHT_AMPDU_RX; 235178354Ssam if (vap->iv_htcaps & IEEE80211_HTC_AMPDU) 236193655Ssam vap->iv_flags_ht |= IEEE80211_FHT_AMPDU_TX; 237193655Ssam vap->iv_flags_ht |= IEEE80211_FHT_AMSDU_RX; 238178354Ssam if (vap->iv_htcaps & IEEE80211_HTC_AMSDU) 239193655Ssam vap->iv_flags_ht |= IEEE80211_FHT_AMSDU_TX; 240170530Ssam } 241178354Ssam /* NB: disable default legacy WDS, too many issues right now */ 242178354Ssam if (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) 243193655Ssam vap->iv_flags_ht &= ~IEEE80211_FHT_HT; 244170530Ssam} 245170530Ssam 246170530Ssamvoid 247178354Ssamieee80211_ht_vdetach(struct ieee80211vap *vap) 248170530Ssam{ 249170530Ssam} 250170530Ssam 251170530Ssamstatic void 252205277Srpauloht_rateprint(struct ieee80211com *ic, int mode, 253205277Srpaulo const struct ieee80211_htrateset *rs, int maxmcs, int ratetype) 254170530Ssam{ 255170530Ssam int i, rate, mword; 256170530Ssam 257205277Srpaulo for (i = 0; i < rs->rs_nrates && i < maxmcs; i++) { 258172226Ssam mword = ieee80211_rate2media(ic, 259172226Ssam rs->rs_rates[i] | IEEE80211_RATE_MCS, mode); 260170530Ssam if (IFM_SUBTYPE(mword) != IFM_IEEE80211_MCS) 261170530Ssam continue; 262205277Srpaulo switch (ratetype) { 263205277Srpaulo case 0: 264205277Srpaulo rate = ieee80211_htrates[ 265205277Srpaulo rs->rs_rates[i]].ht20_rate_800ns; 266205277Srpaulo break; 267205277Srpaulo case 1: 268205277Srpaulo rate = ieee80211_htrates[ 269205277Srpaulo rs->rs_rates[i]].ht20_rate_400ns; 270205277Srpaulo break; 271205277Srpaulo case 2: 272205277Srpaulo rate = ieee80211_htrates[ 273205277Srpaulo rs->rs_rates[i]].ht40_rate_800ns; 274205277Srpaulo break; 275205277Srpaulo default: 276205277Srpaulo rate = ieee80211_htrates[ 277205277Srpaulo rs->rs_rates[i]].ht40_rate_400ns; 278205277Srpaulo break; 279205277Srpaulo } 280170530Ssam printf("%s%d%sMbps", (i != 0 ? " " : ""), 281170530Ssam rate / 2, ((rate & 0x1) != 0 ? ".5" : "")); 282170530Ssam } 283170530Ssam printf("\n"); 284170530Ssam} 285170530Ssam 286205277Srpaulostatic void 287205277Srpauloht_announce(struct ieee80211com *ic, int mode, 288205277Srpaulo const struct ieee80211_htrateset *rs) 289205277Srpaulo{ 290205277Srpaulo struct ifnet *ifp = ic->ic_ifp; 291205281Srpaulo int maxmcs = 2 * 8; 292205277Srpaulo const char *modestr = ieee80211_phymode_name[mode]; 293205277Srpaulo 294205277Srpaulo KASSERT(maxmcs <= 16, ("maxmcs > 16")); 295205277Srpaulo if_printf(ifp, "%d MCS rates\n", maxmcs); 296205277Srpaulo if_printf(ifp, "%s MCS 20Mhz: ", modestr); 297205277Srpaulo ht_rateprint(ic, mode, rs, maxmcs, 0); 298205277Srpaulo if_printf(ifp, "%s MCS 20Mhz SGI: ", modestr); 299205277Srpaulo ht_rateprint(ic, mode, rs, maxmcs, 1); 300205277Srpaulo if_printf(ifp, "%s MCS 40Mhz: ", modestr); 301205277Srpaulo ht_rateprint(ic, mode, rs, maxmcs, 2); 302205277Srpaulo if_printf(ifp, "%s MCS 40Mhz SGI: ", modestr); 303205277Srpaulo ht_rateprint(ic, mode, rs, maxmcs, 3); 304205277Srpaulo} 305205277Srpaulo 306170530Ssamvoid 307170530Ssamieee80211_ht_announce(struct ieee80211com *ic) 308170530Ssam{ 309170530Ssam if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA)) 310170530Ssam ht_announce(ic, IEEE80211_MODE_11NA, &ieee80211_rateset_11n); 311170530Ssam if (isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) 312170530Ssam ht_announce(ic, IEEE80211_MODE_11NG, &ieee80211_rateset_11n); 313170530Ssam} 314170530Ssam 315170530Ssamconst struct ieee80211_htrateset * 316170530Ssamieee80211_get_suphtrates(struct ieee80211com *ic, 317170530Ssam const struct ieee80211_channel *c) 318170530Ssam{ 319173273Ssam return &ieee80211_rateset_11n; 320170530Ssam} 321170530Ssam 322170530Ssam/* 323170530Ssam * Receive processing. 324170530Ssam */ 325170530Ssam 326170530Ssam/* 327170530Ssam * Decap the encapsulated A-MSDU frames and dispatch all but 328170530Ssam * the last for delivery. The last frame is returned for 329170530Ssam * delivery via the normal path. 330170530Ssam */ 331170530Ssamstruct mbuf * 332170530Ssamieee80211_decap_amsdu(struct ieee80211_node *ni, struct mbuf *m) 333170530Ssam{ 334178354Ssam struct ieee80211vap *vap = ni->ni_vap; 335173462Ssam int framelen; 336170530Ssam struct mbuf *n; 337170530Ssam 338170530Ssam /* discard 802.3 header inserted by ieee80211_decap */ 339170530Ssam m_adj(m, sizeof(struct ether_header)); 340170530Ssam 341178354Ssam vap->iv_stats.is_amsdu_decap++; 342170530Ssam 343170530Ssam for (;;) { 344170530Ssam /* 345170530Ssam * Decap the first frame, bust it apart from the 346170530Ssam * remainder and deliver. We leave the last frame 347170530Ssam * delivery to the caller (for consistency with other 348170530Ssam * code paths, could also do it here). 349170530Ssam */ 350170530Ssam m = ieee80211_decap1(m, &framelen); 351170530Ssam if (m == NULL) { 352178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 353173462Ssam ni->ni_macaddr, "a-msdu", "%s", "decap failed"); 354178354Ssam vap->iv_stats.is_amsdu_tooshort++; 355170530Ssam return NULL; 356170530Ssam } 357173462Ssam if (m->m_pkthdr.len == framelen) 358170530Ssam break; 359170530Ssam n = m_split(m, framelen, M_NOWAIT); 360170530Ssam if (n == NULL) { 361178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 362170530Ssam ni->ni_macaddr, "a-msdu", 363170530Ssam "%s", "unable to split encapsulated frames"); 364178354Ssam vap->iv_stats.is_amsdu_split++; 365170530Ssam m_freem(m); /* NB: must reclaim */ 366170530Ssam return NULL; 367170530Ssam } 368178354Ssam vap->iv_deliver_data(vap, ni, m); 369170530Ssam 370170530Ssam /* 371170530Ssam * Remove frame contents; each intermediate frame 372170530Ssam * is required to be aligned to a 4-byte boundary. 373170530Ssam */ 374170530Ssam m = n; 375170530Ssam m_adj(m, roundup2(framelen, 4) - framelen); /* padding */ 376170530Ssam } 377170530Ssam return m; /* last delivered by caller */ 378170530Ssam} 379170530Ssam 380170530Ssam/* 381170530Ssam * Purge all frames in the A-MPDU re-order queue. 382170530Ssam */ 383170530Ssamstatic void 384170530Ssamampdu_rx_purge(struct ieee80211_rx_ampdu *rap) 385170530Ssam{ 386170530Ssam struct mbuf *m; 387170530Ssam int i; 388170530Ssam 389170530Ssam for (i = 0; i < rap->rxa_wnd; i++) { 390170530Ssam m = rap->rxa_m[i]; 391170530Ssam if (m != NULL) { 392170530Ssam rap->rxa_m[i] = NULL; 393170530Ssam rap->rxa_qbytes -= m->m_pkthdr.len; 394170530Ssam m_freem(m); 395170530Ssam if (--rap->rxa_qframes == 0) 396170530Ssam break; 397170530Ssam } 398170530Ssam } 399170530Ssam KASSERT(rap->rxa_qbytes == 0 && rap->rxa_qframes == 0, 400170530Ssam ("lost %u data, %u frames on ampdu rx q", 401170530Ssam rap->rxa_qbytes, rap->rxa_qframes)); 402170530Ssam} 403170530Ssam 404170530Ssam/* 405178354Ssam * Start A-MPDU rx/re-order processing for the specified TID. 406178354Ssam */ 407191552Ssamstatic int 408191552Ssamampdu_rx_start(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap, 409191552Ssam int baparamset, int batimeout, int baseqctl) 410178354Ssam{ 411191552Ssam int bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ); 412191552Ssam 413178354Ssam if (rap->rxa_flags & IEEE80211_AGGR_RUNNING) { 414178354Ssam /* 415178354Ssam * AMPDU previously setup and not terminated with a DELBA, 416178354Ssam * flush the reorder q's in case anything remains. 417178354Ssam */ 418178354Ssam ampdu_rx_purge(rap); 419178354Ssam } 420178354Ssam memset(rap, 0, sizeof(*rap)); 421178354Ssam rap->rxa_wnd = (bufsiz == 0) ? 422178354Ssam IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX); 423191552Ssam rap->rxa_start = MS(baseqctl, IEEE80211_BASEQ_START); 424178354Ssam rap->rxa_flags |= IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_XCHGPEND; 425191552Ssam 426191552Ssam return 0; 427178354Ssam} 428178354Ssam 429178354Ssam/* 430170530Ssam * Stop A-MPDU rx processing for the specified TID. 431170530Ssam */ 432170530Ssamstatic void 433191552Ssamampdu_rx_stop(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap) 434170530Ssam{ 435205277Srpaulo 436170530Ssam ampdu_rx_purge(rap); 437178354Ssam rap->rxa_flags &= ~(IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_XCHGPEND); 438170530Ssam} 439170530Ssam 440170530Ssam/* 441170530Ssam * Dispatch a frame from the A-MPDU reorder queue. The 442170530Ssam * frame is fed back into ieee80211_input marked with an 443183247Ssam * M_AMPDU_MPDU flag so it doesn't come back to us (it also 444170530Ssam * permits ieee80211_input to optimize re-processing). 445170530Ssam */ 446170530Ssamstatic __inline void 447170530Ssamampdu_dispatch(struct ieee80211_node *ni, struct mbuf *m) 448170530Ssam{ 449183247Ssam m->m_flags |= M_AMPDU_MPDU; /* bypass normal processing */ 450192468Ssam /* NB: rssi and noise are ignored w/ M_AMPDU_MPDU set */ 451192468Ssam (void) ieee80211_input(ni, m, 0, 0); 452170530Ssam} 453170530Ssam 454170530Ssam/* 455170530Ssam * Dispatch as many frames as possible from the re-order queue. 456170530Ssam * Frames will always be "at the front"; we process all frames 457170530Ssam * up to the first empty slot in the window. On completion we 458170530Ssam * cleanup state if there are still pending frames in the current 459170530Ssam * BA window. We assume the frame at slot 0 is already handled 460170530Ssam * by the caller; we always start at slot 1. 461170530Ssam */ 462170530Ssamstatic void 463170530Ssamampdu_rx_dispatch(struct ieee80211_rx_ampdu *rap, struct ieee80211_node *ni) 464170530Ssam{ 465178354Ssam struct ieee80211vap *vap = ni->ni_vap; 466170530Ssam struct mbuf *m; 467170530Ssam int i; 468170530Ssam 469170530Ssam /* flush run of frames */ 470170530Ssam for (i = 1; i < rap->rxa_wnd; i++) { 471170530Ssam m = rap->rxa_m[i]; 472170530Ssam if (m == NULL) 473170530Ssam break; 474170530Ssam rap->rxa_m[i] = NULL; 475170530Ssam rap->rxa_qbytes -= m->m_pkthdr.len; 476170530Ssam rap->rxa_qframes--; 477170530Ssam 478170530Ssam ampdu_dispatch(ni, m); 479170530Ssam } 480170530Ssam /* 481170530Ssam * If frames remain, copy the mbuf pointers down so 482170530Ssam * they correspond to the offsets in the new window. 483170530Ssam */ 484170530Ssam if (rap->rxa_qframes != 0) { 485170530Ssam int n = rap->rxa_qframes, j; 486170530Ssam for (j = i+1; j < rap->rxa_wnd; j++) { 487170530Ssam if (rap->rxa_m[j] != NULL) { 488170530Ssam rap->rxa_m[j-i] = rap->rxa_m[j]; 489170530Ssam rap->rxa_m[j] = NULL; 490170530Ssam if (--n == 0) 491170530Ssam break; 492170530Ssam } 493170530Ssam } 494170530Ssam KASSERT(n == 0, ("lost %d frames", n)); 495178354Ssam vap->iv_stats.is_ampdu_rx_copy += rap->rxa_qframes; 496170530Ssam } 497173273Ssam /* 498173273Ssam * Adjust the start of the BA window to 499173273Ssam * reflect the frames just dispatched. 500173273Ssam */ 501173273Ssam rap->rxa_start = IEEE80211_SEQ_ADD(rap->rxa_start, i); 502178354Ssam vap->iv_stats.is_ampdu_rx_oor += i; 503170530Ssam} 504170530Ssam 505173273Ssam#ifdef IEEE80211_AMPDU_AGE 506170530Ssam/* 507173273Ssam * Dispatch all frames in the A-MPDU re-order queue. 508170530Ssam */ 509170530Ssamstatic void 510173273Ssamampdu_rx_flush(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap) 511170530Ssam{ 512178354Ssam struct ieee80211vap *vap = ni->ni_vap; 513170530Ssam struct mbuf *m; 514170530Ssam int i; 515170530Ssam 516173273Ssam for (i = 0; i < rap->rxa_wnd; i++) { 517170530Ssam m = rap->rxa_m[i]; 518170530Ssam if (m == NULL) 519170530Ssam continue; 520170530Ssam rap->rxa_m[i] = NULL; 521170530Ssam rap->rxa_qbytes -= m->m_pkthdr.len; 522173273Ssam rap->rxa_qframes--; 523178354Ssam vap->iv_stats.is_ampdu_rx_oor++; 524173273Ssam 525170530Ssam ampdu_dispatch(ni, m); 526173273Ssam if (rap->rxa_qframes == 0) 527170530Ssam break; 528170530Ssam } 529170530Ssam} 530173273Ssam#endif /* IEEE80211_AMPDU_AGE */ 531170530Ssam 532170530Ssam/* 533173273Ssam * Dispatch all frames in the A-MPDU re-order queue 534173273Ssam * preceding the specified sequence number. This logic 535173273Ssam * handles window moves due to a received MSDU or BAR. 536173273Ssam */ 537173273Ssamstatic void 538173273Ssamampdu_rx_flush_upto(struct ieee80211_node *ni, 539173273Ssam struct ieee80211_rx_ampdu *rap, ieee80211_seq winstart) 540173273Ssam{ 541178354Ssam struct ieee80211vap *vap = ni->ni_vap; 542173273Ssam struct mbuf *m; 543173273Ssam ieee80211_seq seqno; 544173273Ssam int i; 545173273Ssam 546173273Ssam /* 547173273Ssam * Flush any complete MSDU's with a sequence number lower 548173273Ssam * than winstart. Gaps may exist. Note that we may actually 549173273Ssam * dispatch frames past winstart if a run continues; this is 550173273Ssam * an optimization that avoids having to do a separate pass 551173273Ssam * to dispatch frames after moving the BA window start. 552173273Ssam */ 553173273Ssam seqno = rap->rxa_start; 554173273Ssam for (i = 0; i < rap->rxa_wnd; i++) { 555173273Ssam m = rap->rxa_m[i]; 556173273Ssam if (m != NULL) { 557173273Ssam rap->rxa_m[i] = NULL; 558173273Ssam rap->rxa_qbytes -= m->m_pkthdr.len; 559173273Ssam rap->rxa_qframes--; 560178354Ssam vap->iv_stats.is_ampdu_rx_oor++; 561173273Ssam 562173273Ssam ampdu_dispatch(ni, m); 563173273Ssam } else { 564173273Ssam if (!IEEE80211_SEQ_BA_BEFORE(seqno, winstart)) 565173273Ssam break; 566173273Ssam } 567173273Ssam seqno = IEEE80211_SEQ_INC(seqno); 568173273Ssam } 569173273Ssam /* 570173273Ssam * If frames remain, copy the mbuf pointers down so 571173273Ssam * they correspond to the offsets in the new window. 572173273Ssam */ 573173273Ssam if (rap->rxa_qframes != 0) { 574173273Ssam int n = rap->rxa_qframes, j; 575178354Ssam 576178354Ssam /* NB: this loop assumes i > 0 and/or rxa_m[0] is NULL */ 577178354Ssam KASSERT(rap->rxa_m[0] == NULL, 578178354Ssam ("%s: BA window slot 0 occupied", __func__)); 579173273Ssam for (j = i+1; j < rap->rxa_wnd; j++) { 580173273Ssam if (rap->rxa_m[j] != NULL) { 581173273Ssam rap->rxa_m[j-i] = rap->rxa_m[j]; 582173273Ssam rap->rxa_m[j] = NULL; 583173273Ssam if (--n == 0) 584173273Ssam break; 585173273Ssam } 586173273Ssam } 587173273Ssam KASSERT(n == 0, ("%s: lost %d frames, qframes %d off %d " 588173273Ssam "BA win <%d:%d> winstart %d", 589173273Ssam __func__, n, rap->rxa_qframes, i, rap->rxa_start, 590173273Ssam IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 591173273Ssam winstart)); 592178354Ssam vap->iv_stats.is_ampdu_rx_copy += rap->rxa_qframes; 593173273Ssam } 594173273Ssam /* 595173273Ssam * Move the start of the BA window; we use the 596173273Ssam * sequence number of the last MSDU that was 597173273Ssam * passed up the stack+1 or winstart if stopped on 598173273Ssam * a gap in the reorder buffer. 599173273Ssam */ 600173273Ssam rap->rxa_start = seqno; 601173273Ssam} 602173273Ssam 603173273Ssam/* 604170530Ssam * Process a received QoS data frame for an HT station. Handle 605170530Ssam * A-MPDU reordering: if this frame is received out of order 606170530Ssam * and falls within the BA window hold onto it. Otherwise if 607173273Ssam * this frame completes a run, flush any pending frames. We 608170530Ssam * return 1 if the frame is consumed. A 0 is returned if 609170530Ssam * the frame should be processed normally by the caller. 610170530Ssam */ 611170530Ssamint 612170530Ssamieee80211_ampdu_reorder(struct ieee80211_node *ni, struct mbuf *m) 613170530Ssam{ 614170530Ssam#define IEEE80211_FC0_QOSDATA \ 615170530Ssam (IEEE80211_FC0_TYPE_DATA|IEEE80211_FC0_SUBTYPE_QOS|IEEE80211_FC0_VERSION_0) 616173273Ssam#define PROCESS 0 /* caller should process frame */ 617173273Ssam#define CONSUMED 1 /* frame consumed, caller does nothing */ 618178354Ssam struct ieee80211vap *vap = ni->ni_vap; 619170530Ssam struct ieee80211_qosframe *wh; 620170530Ssam struct ieee80211_rx_ampdu *rap; 621170530Ssam ieee80211_seq rxseq; 622170530Ssam uint8_t tid; 623170530Ssam int off; 624170530Ssam 625183247Ssam KASSERT((m->m_flags & (M_AMPDU | M_AMPDU_MPDU)) == M_AMPDU, 626183247Ssam ("!a-mpdu or already re-ordered, flags 0x%x", m->m_flags)); 627170530Ssam KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT sta")); 628170530Ssam 629170530Ssam /* NB: m_len known to be sufficient */ 630170530Ssam wh = mtod(m, struct ieee80211_qosframe *); 631183247Ssam if (wh->i_fc[0] != IEEE80211_FC0_QOSDATA) { 632183247Ssam /* 633183247Ssam * Not QoS data, shouldn't get here but just 634183247Ssam * return it to the caller for processing. 635183247Ssam */ 636183247Ssam return PROCESS; 637183247Ssam } 638193840Ssam if (IEEE80211_IS_DSTODS(wh)) 639173273Ssam tid = ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0]; 640173273Ssam else 641173273Ssam tid = wh->i_qos[0]; 642173273Ssam tid &= IEEE80211_QOS_TID; 643170530Ssam rap = &ni->ni_rx_ampdu[tid]; 644170530Ssam if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) { 645170530Ssam /* 646170530Ssam * No ADDBA request yet, don't touch. 647170530Ssam */ 648173273Ssam return PROCESS; 649170530Ssam } 650182827Ssam rxseq = le16toh(*(uint16_t *)wh->i_seq); 651182827Ssam if ((rxseq & IEEE80211_SEQ_FRAG_MASK) != 0) { 652182827Ssam /* 653182827Ssam * Fragments are not allowed; toss. 654182827Ssam */ 655182827Ssam IEEE80211_DISCARD_MAC(vap, 656182827Ssam IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr, 657182827Ssam "A-MPDU", "fragment, rxseq 0x%x tid %u%s", rxseq, tid, 658182827Ssam wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : ""); 659182827Ssam vap->iv_stats.is_ampdu_rx_drop++; 660182827Ssam IEEE80211_NODE_STAT(ni, rx_drop); 661182827Ssam m_freem(m); 662182827Ssam return CONSUMED; 663182827Ssam } 664182827Ssam rxseq >>= IEEE80211_SEQ_SEQ_SHIFT; 665173273Ssam rap->rxa_nframes++; 666173273Ssamagain: 667170530Ssam if (rxseq == rap->rxa_start) { 668170530Ssam /* 669170530Ssam * First frame in window. 670170530Ssam */ 671170530Ssam if (rap->rxa_qframes != 0) { 672170530Ssam /* 673170530Ssam * Dispatch as many packets as we can. 674170530Ssam */ 675170530Ssam KASSERT(rap->rxa_m[0] == NULL, ("unexpected dup")); 676170530Ssam ampdu_dispatch(ni, m); 677170530Ssam ampdu_rx_dispatch(rap, ni); 678173273Ssam return CONSUMED; 679170530Ssam } else { 680170530Ssam /* 681170530Ssam * In order; advance window and notify 682170530Ssam * caller to dispatch directly. 683170530Ssam */ 684170530Ssam rap->rxa_start = IEEE80211_SEQ_INC(rxseq); 685173273Ssam return PROCESS; 686170530Ssam } 687170530Ssam } 688170530Ssam /* 689173273Ssam * Frame is out of order; store if in the BA window. 690170530Ssam */ 691170530Ssam /* calculate offset in BA window */ 692170530Ssam off = IEEE80211_SEQ_SUB(rxseq, rap->rxa_start); 693173273Ssam if (off < rap->rxa_wnd) { 694170530Ssam /* 695173273Ssam * Common case (hopefully): in the BA window. 696205277Srpaulo * Sec 9.10.7.6.2 a) (p.137) 697173273Ssam */ 698173273Ssam#ifdef IEEE80211_AMPDU_AGE 699173273Ssam /* 700173273Ssam * Check for frames sitting too long in the reorder queue. 701173273Ssam * This should only ever happen if frames are not delivered 702173273Ssam * without the sender otherwise notifying us (e.g. with a 703173273Ssam * BAR to move the window). Typically this happens because 704173273Ssam * of vendor bugs that cause the sequence number to jump. 705173273Ssam * When this happens we get a gap in the reorder queue that 706173273Ssam * leaves frame sitting on the queue until they get pushed 707173273Ssam * out due to window moves. When the vendor does not send 708173273Ssam * BAR this move only happens due to explicit packet sends 709170530Ssam * 710173273Ssam * NB: we only track the time of the oldest frame in the 711173273Ssam * reorder q; this means that if we flush we might push 712173273Ssam * frames that still "new"; if this happens then subsequent 713173273Ssam * frames will result in BA window moves which cost something 714173273Ssam * but is still better than a big throughput dip. 715170530Ssam */ 716173273Ssam if (rap->rxa_qframes != 0) { 717173273Ssam /* XXX honor batimeout? */ 718173273Ssam if (ticks - rap->rxa_age > ieee80211_ampdu_age) { 719173273Ssam /* 720173273Ssam * Too long since we received the first 721173273Ssam * frame; flush the reorder buffer. 722173273Ssam */ 723173273Ssam if (rap->rxa_qframes != 0) { 724178354Ssam vap->iv_stats.is_ampdu_rx_age += 725173273Ssam rap->rxa_qframes; 726173273Ssam ampdu_rx_flush(ni, rap); 727173273Ssam } 728173273Ssam rap->rxa_start = IEEE80211_SEQ_INC(rxseq); 729173273Ssam return PROCESS; 730173273Ssam } 731173273Ssam } else { 732173273Ssam /* 733173273Ssam * First frame, start aging timer. 734173273Ssam */ 735173273Ssam rap->rxa_age = ticks; 736173273Ssam } 737173273Ssam#endif /* IEEE80211_AMPDU_AGE */ 738173273Ssam /* save packet */ 739173273Ssam if (rap->rxa_m[off] == NULL) { 740173273Ssam rap->rxa_m[off] = m; 741173273Ssam rap->rxa_qframes++; 742173273Ssam rap->rxa_qbytes += m->m_pkthdr.len; 743178354Ssam vap->iv_stats.is_ampdu_rx_reorder++; 744173273Ssam } else { 745178354Ssam IEEE80211_DISCARD_MAC(vap, 746173273Ssam IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, 747173273Ssam ni->ni_macaddr, "a-mpdu duplicate", 748173273Ssam "seqno %u tid %u BA win <%u:%u>", 749173273Ssam rxseq, tid, rap->rxa_start, 750173273Ssam IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1)); 751178354Ssam vap->iv_stats.is_rx_dup++; 752173273Ssam IEEE80211_NODE_STAT(ni, rx_dup); 753173273Ssam m_freem(m); 754173273Ssam } 755173273Ssam return CONSUMED; 756173273Ssam } 757173273Ssam if (off < IEEE80211_SEQ_BA_RANGE) { 758173273Ssam /* 759173273Ssam * Outside the BA window, but within range; 760173273Ssam * flush the reorder q and move the window. 761205277Srpaulo * Sec 9.10.7.6.2 b) (p.138) 762173273Ssam */ 763178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni, 764173273Ssam "move BA win <%u:%u> (%u frames) rxseq %u tid %u", 765170530Ssam rap->rxa_start, 766173273Ssam IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 767170530Ssam rap->rxa_qframes, rxseq, tid); 768178354Ssam vap->iv_stats.is_ampdu_rx_move++; 769170530Ssam 770173273Ssam /* 771173273Ssam * The spec says to flush frames up to but not including: 772173273Ssam * WinStart_B = rxseq - rap->rxa_wnd + 1 773173273Ssam * Then insert the frame or notify the caller to process 774173273Ssam * it immediately. We can safely do this by just starting 775173273Ssam * over again because we know the frame will now be within 776173273Ssam * the BA window. 777173273Ssam */ 778173273Ssam /* NB: rxa_wnd known to be >0 */ 779173273Ssam ampdu_rx_flush_upto(ni, rap, 780173273Ssam IEEE80211_SEQ_SUB(rxseq, rap->rxa_wnd-1)); 781173273Ssam goto again; 782170530Ssam } else { 783170530Ssam /* 784173273Ssam * Outside the BA window and out of range; toss. 785205277Srpaulo * Sec 9.10.7.6.2 c) (p.138) 786170530Ssam */ 787178354Ssam IEEE80211_DISCARD_MAC(vap, 788173273Ssam IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr, 789178354Ssam "MPDU", "BA win <%u:%u> (%u frames) rxseq %u tid %u%s", 790173273Ssam rap->rxa_start, 791173273Ssam IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 792173273Ssam rap->rxa_qframes, rxseq, tid, 793173273Ssam wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : ""); 794178354Ssam vap->iv_stats.is_ampdu_rx_drop++; 795173273Ssam IEEE80211_NODE_STAT(ni, rx_drop); 796170530Ssam m_freem(m); 797173273Ssam return CONSUMED; 798170530Ssam } 799173273Ssam#undef CONSUMED 800173273Ssam#undef PROCESS 801170530Ssam#undef IEEE80211_FC0_QOSDATA 802170530Ssam} 803170530Ssam 804170530Ssam/* 805170530Ssam * Process a BAR ctl frame. Dispatch all frames up to 806170530Ssam * the sequence number of the frame. If this frame is 807173273Ssam * out of range it's discarded. 808170530Ssam */ 809170530Ssamvoid 810170530Ssamieee80211_recv_bar(struct ieee80211_node *ni, struct mbuf *m0) 811170530Ssam{ 812178354Ssam struct ieee80211vap *vap = ni->ni_vap; 813170530Ssam struct ieee80211_frame_bar *wh; 814170530Ssam struct ieee80211_rx_ampdu *rap; 815170530Ssam ieee80211_seq rxseq; 816170530Ssam int tid, off; 817170530Ssam 818173273Ssam if (!ieee80211_recv_bar_ena) { 819173273Ssam#if 0 820178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_11N, 821173273Ssam ni->ni_macaddr, "BAR", "%s", "processing disabled"); 822173273Ssam#endif 823178354Ssam vap->iv_stats.is_ampdu_bar_bad++; 824173273Ssam return; 825173273Ssam } 826170530Ssam wh = mtod(m0, struct ieee80211_frame_bar *); 827170530Ssam /* XXX check basic BAR */ 828170530Ssam tid = MS(le16toh(wh->i_ctl), IEEE80211_BAR_TID); 829170530Ssam rap = &ni->ni_rx_ampdu[tid]; 830170530Ssam if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) { 831170530Ssam /* 832170530Ssam * No ADDBA request yet, don't touch. 833170530Ssam */ 834178354Ssam IEEE80211_DISCARD_MAC(vap, 835170530Ssam IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, 836170530Ssam ni->ni_macaddr, "BAR", "no BA stream, tid %u", tid); 837178354Ssam vap->iv_stats.is_ampdu_bar_bad++; 838170530Ssam return; 839170530Ssam } 840178354Ssam vap->iv_stats.is_ampdu_bar_rx++; 841170530Ssam rxseq = le16toh(wh->i_seq) >> IEEE80211_SEQ_SEQ_SHIFT; 842173273Ssam if (rxseq == rap->rxa_start) 843173273Ssam return; 844170530Ssam /* calculate offset in BA window */ 845170530Ssam off = IEEE80211_SEQ_SUB(rxseq, rap->rxa_start); 846173273Ssam if (off < IEEE80211_SEQ_BA_RANGE) { 847170530Ssam /* 848173273Ssam * Flush the reorder q up to rxseq and move the window. 849205277Srpaulo * Sec 9.10.7.6.3 a) (p.138) 850170530Ssam */ 851178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni, 852173273Ssam "BAR moves BA win <%u:%u> (%u frames) rxseq %u tid %u", 853170530Ssam rap->rxa_start, 854173273Ssam IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 855173273Ssam rap->rxa_qframes, rxseq, tid); 856178354Ssam vap->iv_stats.is_ampdu_bar_move++; 857173273Ssam 858173273Ssam ampdu_rx_flush_upto(ni, rap, rxseq); 859173273Ssam if (off >= rap->rxa_wnd) { 860173273Ssam /* 861173273Ssam * BAR specifies a window start to the right of BA 862173273Ssam * window; we must move it explicitly since 863173273Ssam * ampdu_rx_flush_upto will not. 864173273Ssam */ 865173273Ssam rap->rxa_start = rxseq; 866170530Ssam } 867173273Ssam } else { 868170530Ssam /* 869173273Ssam * Out of range; toss. 870205277Srpaulo * Sec 9.10.7.6.3 b) (p.138) 871170530Ssam */ 872178354Ssam IEEE80211_DISCARD_MAC(vap, 873173273Ssam IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr, 874173273Ssam "BAR", "BA win <%u:%u> (%u frames) rxseq %u tid %u%s", 875173273Ssam rap->rxa_start, 876173273Ssam IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 877173273Ssam rap->rxa_qframes, rxseq, tid, 878173273Ssam wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : ""); 879178354Ssam vap->iv_stats.is_ampdu_bar_oow++; 880173273Ssam IEEE80211_NODE_STAT(ni, rx_drop); 881170530Ssam } 882170530Ssam} 883170530Ssam 884170530Ssam/* 885170530Ssam * Setup HT-specific state in a node. Called only 886170530Ssam * when HT use is negotiated so we don't do extra 887170530Ssam * work for temporary and/or legacy sta's. 888170530Ssam */ 889170530Ssamvoid 890183254Ssamieee80211_ht_node_init(struct ieee80211_node *ni) 891170530Ssam{ 892170530Ssam struct ieee80211_tx_ampdu *tap; 893170530Ssam int ac; 894170530Ssam 895173273Ssam if (ni->ni_flags & IEEE80211_NODE_HT) { 896173273Ssam /* 897173273Ssam * Clean AMPDU state on re-associate. This handles the case 898173273Ssam * where a station leaves w/o notifying us and then returns 899173273Ssam * before node is reaped for inactivity. 900173273Ssam */ 901173273Ssam ieee80211_ht_node_cleanup(ni); 902173273Ssam } 903170530Ssam for (ac = 0; ac < WME_NUM_AC; ac++) { 904170530Ssam tap = &ni->ni_tx_ampdu[ac]; 905170530Ssam tap->txa_ac = ac; 906184280Ssam tap->txa_ni = ni; 907173273Ssam /* NB: further initialization deferred */ 908170530Ssam } 909173273Ssam ni->ni_flags |= IEEE80211_NODE_HT | IEEE80211_NODE_AMPDU; 910170530Ssam} 911170530Ssam 912170530Ssam/* 913170530Ssam * Cleanup HT-specific state in a node. Called only 914170530Ssam * when HT use has been marked. 915170530Ssam */ 916170530Ssamvoid 917170530Ssamieee80211_ht_node_cleanup(struct ieee80211_node *ni) 918170530Ssam{ 919191552Ssam struct ieee80211com *ic = ni->ni_ic; 920170530Ssam int i; 921170530Ssam 922170530Ssam KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT node")); 923170530Ssam 924170530Ssam /* XXX optimize this */ 925170530Ssam for (i = 0; i < WME_NUM_AC; i++) { 926170530Ssam struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[i]; 927184280Ssam if (tap->txa_flags & IEEE80211_AGGR_SETUP) 928184280Ssam ampdu_tx_stop(tap); 929170530Ssam } 930170530Ssam for (i = 0; i < WME_NUM_TID; i++) 931191552Ssam ic->ic_ampdu_rx_stop(ni, &ni->ni_rx_ampdu[i]); 932170530Ssam 933170530Ssam ni->ni_htcap = 0; 934182828Ssam ni->ni_flags &= ~IEEE80211_NODE_HT_ALL; 935170530Ssam} 936170530Ssam 937178354Ssam/* 938178354Ssam * Age out HT resources for a station. 939178354Ssam */ 940178354Ssamvoid 941178354Ssamieee80211_ht_node_age(struct ieee80211_node *ni) 942178354Ssam{ 943178354Ssam#ifdef IEEE80211_AMPDU_AGE 944178354Ssam struct ieee80211vap *vap = ni->ni_vap; 945178354Ssam uint8_t tid; 946178354Ssam#endif 947178354Ssam 948178354Ssam KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT sta")); 949178354Ssam 950178354Ssam#ifdef IEEE80211_AMPDU_AGE 951178354Ssam for (tid = 0; tid < WME_NUM_TID; tid++) { 952178354Ssam struct ieee80211_rx_ampdu *rap; 953178354Ssam 954178354Ssam rap = &ni->ni_rx_ampdu[tid]; 955178354Ssam if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) 956178354Ssam continue; 957178354Ssam if (rap->rxa_qframes == 0) 958178354Ssam continue; 959178354Ssam /* 960178354Ssam * Check for frames sitting too long in the reorder queue. 961178354Ssam * See above for more details on what's happening here. 962178354Ssam */ 963178354Ssam /* XXX honor batimeout? */ 964178354Ssam if (ticks - rap->rxa_age > ieee80211_ampdu_age) { 965178354Ssam /* 966178354Ssam * Too long since we received the first 967178354Ssam * frame; flush the reorder buffer. 968178354Ssam */ 969178354Ssam vap->iv_stats.is_ampdu_rx_age += rap->rxa_qframes; 970178354Ssam ampdu_rx_flush(ni, rap); 971178354Ssam } 972178354Ssam } 973178354Ssam#endif /* IEEE80211_AMPDU_AGE */ 974178354Ssam} 975178354Ssam 976173273Ssamstatic struct ieee80211_channel * 977173273Ssamfindhtchan(struct ieee80211com *ic, struct ieee80211_channel *c, int htflags) 978173273Ssam{ 979173273Ssam return ieee80211_find_channel(ic, c->ic_freq, 980173273Ssam (c->ic_flags &~ IEEE80211_CHAN_HT) | htflags); 981173273Ssam} 982173273Ssam 983173273Ssam/* 984173273Ssam * Adjust a channel to be HT/non-HT according to the vap's configuration. 985173273Ssam */ 986173273Ssamstruct ieee80211_channel * 987173273Ssamieee80211_ht_adjust_channel(struct ieee80211com *ic, 988173273Ssam struct ieee80211_channel *chan, int flags) 989173273Ssam{ 990173273Ssam struct ieee80211_channel *c; 991173273Ssam 992193655Ssam if (flags & IEEE80211_FHT_HT) { 993173273Ssam /* promote to HT if possible */ 994193655Ssam if (flags & IEEE80211_FHT_USEHT40) { 995173273Ssam if (!IEEE80211_IS_CHAN_HT40(chan)) { 996173273Ssam /* NB: arbitrarily pick ht40+ over ht40- */ 997173273Ssam c = findhtchan(ic, chan, IEEE80211_CHAN_HT40U); 998173273Ssam if (c == NULL) 999173273Ssam c = findhtchan(ic, chan, 1000173273Ssam IEEE80211_CHAN_HT40D); 1001173273Ssam if (c == NULL) 1002173273Ssam c = findhtchan(ic, chan, 1003173273Ssam IEEE80211_CHAN_HT20); 1004173273Ssam if (c != NULL) 1005173273Ssam chan = c; 1006173273Ssam } 1007173273Ssam } else if (!IEEE80211_IS_CHAN_HT20(chan)) { 1008173273Ssam c = findhtchan(ic, chan, IEEE80211_CHAN_HT20); 1009173273Ssam if (c != NULL) 1010173273Ssam chan = c; 1011173273Ssam } 1012173273Ssam } else if (IEEE80211_IS_CHAN_HT(chan)) { 1013173273Ssam /* demote to legacy, HT use is disabled */ 1014173273Ssam c = ieee80211_find_channel(ic, chan->ic_freq, 1015173273Ssam chan->ic_flags &~ IEEE80211_CHAN_HT); 1016173273Ssam if (c != NULL) 1017173273Ssam chan = c; 1018173273Ssam } 1019173273Ssam return chan; 1020173273Ssam} 1021173273Ssam 1022173273Ssam/* 1023173273Ssam * Setup HT-specific state for a legacy WDS peer. 1024173273Ssam */ 1025173273Ssamvoid 1026173273Ssamieee80211_ht_wds_init(struct ieee80211_node *ni) 1027173273Ssam{ 1028178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1029173273Ssam struct ieee80211_tx_ampdu *tap; 1030173273Ssam int ac; 1031173273Ssam 1032193655Ssam KASSERT(vap->iv_flags_ht & IEEE80211_FHT_HT, ("no HT requested")); 1033173273Ssam 1034173273Ssam /* XXX check scan cache in case peer has an ap and we have info */ 1035173273Ssam /* 1036173273Ssam * If setup with a legacy channel; locate an HT channel. 1037173273Ssam * Otherwise if the inherited channel (from a companion 1038173273Ssam * AP) is suitable use it so we use the same location 1039173273Ssam * for the extension channel). 1040173273Ssam */ 1041178354Ssam ni->ni_chan = ieee80211_ht_adjust_channel(ni->ni_ic, 1042178354Ssam ni->ni_chan, ieee80211_htchanflags(ni->ni_chan)); 1043173273Ssam 1044173273Ssam ni->ni_htcap = 0; 1045193655Ssam if (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20) 1046173273Ssam ni->ni_htcap |= IEEE80211_HTCAP_SHORTGI20; 1047173273Ssam if (IEEE80211_IS_CHAN_HT40(ni->ni_chan)) { 1048173273Ssam ni->ni_htcap |= IEEE80211_HTCAP_CHWIDTH40; 1049173273Ssam ni->ni_chw = 40; 1050173273Ssam if (IEEE80211_IS_CHAN_HT40U(ni->ni_chan)) 1051173273Ssam ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_ABOVE; 1052173273Ssam else if (IEEE80211_IS_CHAN_HT40D(ni->ni_chan)) 1053173273Ssam ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_BELOW; 1054193655Ssam if (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40) 1055173273Ssam ni->ni_htcap |= IEEE80211_HTCAP_SHORTGI40; 1056173273Ssam } else { 1057173273Ssam ni->ni_chw = 20; 1058173273Ssam ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_NONE; 1059173273Ssam } 1060173273Ssam ni->ni_htctlchan = ni->ni_chan->ic_ieee; 1061193655Ssam if (vap->iv_flags_ht & IEEE80211_FHT_RIFS) 1062183256Ssam ni->ni_flags |= IEEE80211_NODE_RIFS; 1063183256Ssam /* XXX does it make sense to enable SMPS? */ 1064173273Ssam 1065173273Ssam ni->ni_htopmode = 0; /* XXX need protection state */ 1066173273Ssam ni->ni_htstbc = 0; /* XXX need info */ 1067173273Ssam 1068173273Ssam for (ac = 0; ac < WME_NUM_AC; ac++) { 1069173273Ssam tap = &ni->ni_tx_ampdu[ac]; 1070173273Ssam tap->txa_ac = ac; 1071173273Ssam } 1072193655Ssam /* NB: AMPDU tx/rx governed by IEEE80211_FHT_AMPDU_{TX,RX} */ 1073173273Ssam ni->ni_flags |= IEEE80211_NODE_HT | IEEE80211_NODE_AMPDU; 1074173273Ssam} 1075173273Ssam 1076173273Ssam/* 1077173273Ssam * Notify hostap vaps of a change in the HTINFO ie. 1078173273Ssam */ 1079173273Ssamstatic void 1080173273Ssamhtinfo_notify(struct ieee80211com *ic) 1081173273Ssam{ 1082178354Ssam struct ieee80211vap *vap; 1083178354Ssam int first = 1; 1084178354Ssam 1085178354Ssam IEEE80211_LOCK_ASSERT(ic); 1086178354Ssam 1087178354Ssam TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 1088178354Ssam if (vap->iv_opmode != IEEE80211_M_HOSTAP) 1089178354Ssam continue; 1090183253Ssam if (vap->iv_state != IEEE80211_S_RUN || 1091183253Ssam !IEEE80211_IS_CHAN_HT(vap->iv_bss->ni_chan)) 1092183253Ssam continue; 1093178354Ssam if (first) { 1094178354Ssam IEEE80211_NOTE(vap, 1095178354Ssam IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, 1096178354Ssam vap->iv_bss, 1097178354Ssam "HT bss occupancy change: %d sta, %d ht, " 1098178354Ssam "%d ht40%s, HT protmode now 0x%x" 1099178354Ssam , ic->ic_sta_assoc 1100178354Ssam , ic->ic_ht_sta_assoc 1101178354Ssam , ic->ic_ht40_sta_assoc 1102193655Ssam , (ic->ic_flags_ht & IEEE80211_FHT_NONHT_PR) ? 1103178354Ssam ", non-HT sta present" : "" 1104178354Ssam , ic->ic_curhtprotmode); 1105178354Ssam first = 0; 1106178354Ssam } 1107178354Ssam ieee80211_beacon_notify(vap, IEEE80211_BEACON_HTINFO); 1108178354Ssam } 1109173273Ssam} 1110173273Ssam 1111173273Ssam/* 1112173273Ssam * Calculate HT protection mode from current 1113173273Ssam * state and handle updates. 1114173273Ssam */ 1115173273Ssamstatic void 1116173273Ssamhtinfo_update(struct ieee80211com *ic) 1117173273Ssam{ 1118173273Ssam uint8_t protmode; 1119173273Ssam 1120178354Ssam if (ic->ic_sta_assoc != ic->ic_ht_sta_assoc) { 1121178354Ssam protmode = IEEE80211_HTINFO_OPMODE_MIXED 1122178354Ssam | IEEE80211_HTINFO_NONHT_PRESENT; 1123193655Ssam } else if (ic->ic_flags_ht & IEEE80211_FHT_NONHT_PR) { 1124173273Ssam protmode = IEEE80211_HTINFO_OPMODE_PROTOPT 1125178354Ssam | IEEE80211_HTINFO_NONHT_PRESENT; 1126178354Ssam } else if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && 1127178354Ssam IEEE80211_IS_CHAN_HT40(ic->ic_bsschan) && 1128173273Ssam ic->ic_sta_assoc != ic->ic_ht40_sta_assoc) { 1129173273Ssam protmode = IEEE80211_HTINFO_OPMODE_HT20PR; 1130173273Ssam } else { 1131173273Ssam protmode = IEEE80211_HTINFO_OPMODE_PURE; 1132173273Ssam } 1133173273Ssam if (protmode != ic->ic_curhtprotmode) { 1134173273Ssam ic->ic_curhtprotmode = protmode; 1135173273Ssam htinfo_notify(ic); 1136173273Ssam } 1137173273Ssam} 1138173273Ssam 1139173273Ssam/* 1140173273Ssam * Handle an HT station joining a BSS. 1141173273Ssam */ 1142173273Ssamvoid 1143173273Ssamieee80211_ht_node_join(struct ieee80211_node *ni) 1144173273Ssam{ 1145173273Ssam struct ieee80211com *ic = ni->ni_ic; 1146173273Ssam 1147173273Ssam IEEE80211_LOCK_ASSERT(ic); 1148173273Ssam 1149173273Ssam if (ni->ni_flags & IEEE80211_NODE_HT) { 1150173273Ssam ic->ic_ht_sta_assoc++; 1151173273Ssam if (ni->ni_chw == 40) 1152173273Ssam ic->ic_ht40_sta_assoc++; 1153173273Ssam } 1154173273Ssam htinfo_update(ic); 1155173273Ssam} 1156173273Ssam 1157173273Ssam/* 1158173273Ssam * Handle an HT station leaving a BSS. 1159173273Ssam */ 1160173273Ssamvoid 1161173273Ssamieee80211_ht_node_leave(struct ieee80211_node *ni) 1162173273Ssam{ 1163173273Ssam struct ieee80211com *ic = ni->ni_ic; 1164173273Ssam 1165173273Ssam IEEE80211_LOCK_ASSERT(ic); 1166173273Ssam 1167173273Ssam if (ni->ni_flags & IEEE80211_NODE_HT) { 1168173273Ssam ic->ic_ht_sta_assoc--; 1169173273Ssam if (ni->ni_chw == 40) 1170173273Ssam ic->ic_ht40_sta_assoc--; 1171173273Ssam } 1172173273Ssam htinfo_update(ic); 1173173273Ssam} 1174173273Ssam 1175173273Ssam/* 1176173273Ssam * Public version of htinfo_update; used for processing 1177178354Ssam * beacon frames from overlapping bss. 1178178354Ssam * 1179178354Ssam * Caller can specify either IEEE80211_HTINFO_OPMODE_MIXED 1180178354Ssam * (on receipt of a beacon that advertises MIXED) or 1181178354Ssam * IEEE80211_HTINFO_OPMODE_PROTOPT (on receipt of a beacon 1182178354Ssam * from an overlapping legacy bss). We treat MIXED with 1183178354Ssam * a higher precedence than PROTOPT (i.e. we will not change 1184178354Ssam * change PROTOPT -> MIXED; only MIXED -> PROTOPT). This 1185178354Ssam * corresponds to how we handle things in htinfo_update. 1186173273Ssam */ 1187173273Ssamvoid 1188178354Ssamieee80211_htprot_update(struct ieee80211com *ic, int protmode) 1189173273Ssam{ 1190178354Ssam#define OPMODE(x) SM(x, IEEE80211_HTINFO_OPMODE) 1191183246Ssam IEEE80211_LOCK(ic); 1192178354Ssam 1193178354Ssam /* track non-HT station presence */ 1194178354Ssam KASSERT(protmode & IEEE80211_HTINFO_NONHT_PRESENT, 1195183246Ssam ("protmode 0x%x", protmode)); 1196193655Ssam ic->ic_flags_ht |= IEEE80211_FHT_NONHT_PR; 1197178354Ssam ic->ic_lastnonht = ticks; 1198178354Ssam 1199183246Ssam if (protmode != ic->ic_curhtprotmode && 1200183246Ssam (OPMODE(ic->ic_curhtprotmode) != IEEE80211_HTINFO_OPMODE_MIXED || 1201183246Ssam OPMODE(protmode) == IEEE80211_HTINFO_OPMODE_PROTOPT)) { 1202183246Ssam /* push beacon update */ 1203183246Ssam ic->ic_curhtprotmode = protmode; 1204183246Ssam htinfo_notify(ic); 1205183246Ssam } 1206181197Ssam IEEE80211_UNLOCK(ic); 1207178354Ssam#undef OPMODE 1208173273Ssam} 1209173273Ssam 1210173273Ssam/* 1211173273Ssam * Time out presence of an overlapping bss with non-HT 1212173273Ssam * stations. When operating in hostap mode we listen for 1213173273Ssam * beacons from other stations and if we identify a non-HT 1214173273Ssam * station is present we update the opmode field of the 1215173273Ssam * HTINFO ie. To identify when all non-HT stations are 1216173273Ssam * gone we time out this condition. 1217173273Ssam */ 1218173273Ssamvoid 1219173273Ssamieee80211_ht_timeout(struct ieee80211com *ic) 1220173273Ssam{ 1221173273Ssam IEEE80211_LOCK_ASSERT(ic); 1222173273Ssam 1223193655Ssam if ((ic->ic_flags_ht & IEEE80211_FHT_NONHT_PR) && 1224173273Ssam time_after(ticks, ic->ic_lastnonht + IEEE80211_NONHT_PRESENT_AGE)) { 1225173273Ssam#if 0 1226178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni, 1227173273Ssam "%s", "time out non-HT STA present on channel"); 1228173273Ssam#endif 1229193655Ssam ic->ic_flags_ht &= ~IEEE80211_FHT_NONHT_PR; 1230173273Ssam htinfo_update(ic); 1231173273Ssam } 1232173273Ssam} 1233173273Ssam 1234170530Ssam/* unalligned little endian access */ 1235170530Ssam#define LE_READ_2(p) \ 1236170530Ssam ((uint16_t) \ 1237170530Ssam ((((const uint8_t *)(p))[0] ) | \ 1238170530Ssam (((const uint8_t *)(p))[1] << 8))) 1239170530Ssam 1240170530Ssam/* 1241170530Ssam * Process an 802.11n HT capabilities ie. 1242170530Ssam */ 1243170530Ssamvoid 1244170530Ssamieee80211_parse_htcap(struct ieee80211_node *ni, const uint8_t *ie) 1245170530Ssam{ 1246170530Ssam if (ie[0] == IEEE80211_ELEMID_VENDOR) { 1247170530Ssam /* 1248170530Ssam * Station used Vendor OUI ie to associate; 1249170530Ssam * mark the node so when we respond we'll use 1250170530Ssam * the Vendor OUI's and not the standard ie's. 1251170530Ssam */ 1252170530Ssam ni->ni_flags |= IEEE80211_NODE_HTCOMPAT; 1253170530Ssam ie += 4; 1254170530Ssam } else 1255170530Ssam ni->ni_flags &= ~IEEE80211_NODE_HTCOMPAT; 1256170530Ssam 1257170530Ssam ni->ni_htcap = LE_READ_2(ie + 1258170530Ssam __offsetof(struct ieee80211_ie_htcap, hc_cap)); 1259170530Ssam ni->ni_htparam = ie[__offsetof(struct ieee80211_ie_htcap, hc_param)]; 1260170530Ssam} 1261170530Ssam 1262183254Ssamstatic void 1263183254Ssamhtinfo_parse(struct ieee80211_node *ni, 1264183254Ssam const struct ieee80211_ie_htinfo *htinfo) 1265170530Ssam{ 1266170530Ssam uint16_t w; 1267170530Ssam 1268170530Ssam ni->ni_htctlchan = htinfo->hi_ctrlchannel; 1269170530Ssam ni->ni_ht2ndchan = SM(htinfo->hi_byte1, IEEE80211_HTINFO_2NDCHAN); 1270172055Ssam w = LE_READ_2(&htinfo->hi_byte2); 1271170530Ssam ni->ni_htopmode = SM(w, IEEE80211_HTINFO_OPMODE); 1272170530Ssam w = LE_READ_2(&htinfo->hi_byte45); 1273170530Ssam ni->ni_htstbc = SM(w, IEEE80211_HTINFO_BASIC_STBCMCS); 1274183254Ssam} 1275183254Ssam 1276183254Ssam/* 1277183254Ssam * Parse an 802.11n HT info ie and save useful information 1278183254Ssam * to the node state. Note this does not effect any state 1279183254Ssam * changes such as for channel width change. 1280183254Ssam */ 1281183254Ssamvoid 1282183254Ssamieee80211_parse_htinfo(struct ieee80211_node *ni, const uint8_t *ie) 1283183254Ssam{ 1284183254Ssam if (ie[0] == IEEE80211_ELEMID_VENDOR) 1285183254Ssam ie += 4; 1286183254Ssam htinfo_parse(ni, (const struct ieee80211_ie_htinfo *) ie); 1287183254Ssam} 1288183254Ssam 1289183254Ssam/* 1290183254Ssam * Handle 11n channel switch. Use the received HT ie's to 1291183254Ssam * identify the right channel to use. If we cannot locate it 1292183254Ssam * in the channel table then fallback to legacy operation. 1293183254Ssam * Note that we use this information to identify the node's 1294183254Ssam * channel only; the caller is responsible for insuring any 1295183254Ssam * required channel change is done (e.g. in sta mode when 1296183254Ssam * parsing the contents of a beacon frame). 1297183254Ssam */ 1298183254Ssamstatic void 1299183254Ssamhtinfo_update_chw(struct ieee80211_node *ni, int htflags) 1300183254Ssam{ 1301183254Ssam struct ieee80211com *ic = ni->ni_ic; 1302183254Ssam struct ieee80211_channel *c; 1303183254Ssam int chanflags; 1304183254Ssam 1305173273Ssam chanflags = (ni->ni_chan->ic_flags &~ IEEE80211_CHAN_HT) | htflags; 1306173273Ssam if (chanflags != ni->ni_chan->ic_flags) { 1307183254Ssam /* XXX not right for ht40- */ 1308173273Ssam c = ieee80211_find_channel(ic, ni->ni_chan->ic_freq, chanflags); 1309178354Ssam if (c == NULL && (htflags & IEEE80211_CHAN_HT40)) { 1310173273Ssam /* 1311173273Ssam * No HT40 channel entry in our table; fall back 1312173273Ssam * to HT20 operation. This should not happen. 1313173273Ssam */ 1314173273Ssam c = findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT20); 1315183254Ssam#if 0 1316183254Ssam IEEE80211_NOTE(ni->ni_vap, 1317173273Ssam IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni, 1318173273Ssam "no HT40 channel (freq %u), falling back to HT20", 1319173273Ssam ni->ni_chan->ic_freq); 1320183254Ssam#endif 1321173273Ssam /* XXX stat */ 1322173273Ssam } 1323173273Ssam if (c != NULL && c != ni->ni_chan) { 1324183254Ssam IEEE80211_NOTE(ni->ni_vap, 1325173273Ssam IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni, 1326173273Ssam "switch station to HT%d channel %u/0x%x", 1327173273Ssam IEEE80211_IS_CHAN_HT40(c) ? 40 : 20, 1328173273Ssam c->ic_freq, c->ic_flags); 1329173273Ssam ni->ni_chan = c; 1330173273Ssam } 1331173273Ssam /* NB: caller responsible for forcing any channel change */ 1332173273Ssam } 1333173273Ssam /* update node's tx channel width */ 1334173273Ssam ni->ni_chw = IEEE80211_IS_CHAN_HT40(ni->ni_chan)? 40 : 20; 1335170530Ssam} 1336170530Ssam 1337170530Ssam/* 1338183255Ssam * Update 11n MIMO PS state according to received htcap. 1339183255Ssam */ 1340183255Ssamstatic __inline int 1341183255Ssamhtcap_update_mimo_ps(struct ieee80211_node *ni) 1342183255Ssam{ 1343183255Ssam uint16_t oflags = ni->ni_flags; 1344183255Ssam 1345183255Ssam switch (ni->ni_htcap & IEEE80211_HTCAP_SMPS) { 1346183255Ssam case IEEE80211_HTCAP_SMPS_DYNAMIC: 1347183255Ssam ni->ni_flags |= IEEE80211_NODE_MIMO_PS; 1348183255Ssam ni->ni_flags |= IEEE80211_NODE_MIMO_RTS; 1349183255Ssam break; 1350183255Ssam case IEEE80211_HTCAP_SMPS_ENA: 1351183255Ssam ni->ni_flags |= IEEE80211_NODE_MIMO_PS; 1352183255Ssam ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS; 1353183255Ssam break; 1354183255Ssam case IEEE80211_HTCAP_SMPS_OFF: 1355183255Ssam default: /* disable on rx of reserved value */ 1356183255Ssam ni->ni_flags &= ~IEEE80211_NODE_MIMO_PS; 1357183255Ssam ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS; 1358183255Ssam break; 1359183255Ssam } 1360183255Ssam return (oflags ^ ni->ni_flags); 1361183255Ssam} 1362183255Ssam 1363183255Ssam/* 1364183257Ssam * Update short GI state according to received htcap 1365183257Ssam * and local settings. 1366183257Ssam */ 1367183257Ssamstatic __inline void 1368183257Ssamhtcap_update_shortgi(struct ieee80211_node *ni) 1369183257Ssam{ 1370183257Ssam struct ieee80211vap *vap = ni->ni_vap; 1371183257Ssam 1372183257Ssam ni->ni_flags &= ~(IEEE80211_NODE_SGI20|IEEE80211_NODE_SGI40); 1373183257Ssam if ((ni->ni_htcap & IEEE80211_HTCAP_SHORTGI20) && 1374193655Ssam (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20)) 1375183257Ssam ni->ni_flags |= IEEE80211_NODE_SGI20; 1376183257Ssam if ((ni->ni_htcap & IEEE80211_HTCAP_SHORTGI40) && 1377193655Ssam (vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40)) 1378183257Ssam ni->ni_flags |= IEEE80211_NODE_SGI40; 1379183257Ssam} 1380183257Ssam 1381183257Ssam/* 1382183254Ssam * Parse and update HT-related state extracted from 1383183254Ssam * the HT cap and info ie's. 1384183254Ssam */ 1385183254Ssamvoid 1386183254Ssamieee80211_ht_updateparams(struct ieee80211_node *ni, 1387183254Ssam const uint8_t *htcapie, const uint8_t *htinfoie) 1388183254Ssam{ 1389183254Ssam struct ieee80211vap *vap = ni->ni_vap; 1390183254Ssam const struct ieee80211_ie_htinfo *htinfo; 1391183254Ssam int htflags; 1392183254Ssam 1393183254Ssam ieee80211_parse_htcap(ni, htcapie); 1394183255Ssam if (vap->iv_htcaps & IEEE80211_HTCAP_SMPS) 1395183255Ssam htcap_update_mimo_ps(ni); 1396183257Ssam htcap_update_shortgi(ni); 1397183254Ssam 1398183254Ssam if (htinfoie[0] == IEEE80211_ELEMID_VENDOR) 1399183254Ssam htinfoie += 4; 1400183254Ssam htinfo = (const struct ieee80211_ie_htinfo *) htinfoie; 1401183254Ssam htinfo_parse(ni, htinfo); 1402183254Ssam 1403193655Ssam htflags = (vap->iv_flags_ht & IEEE80211_FHT_HT) ? 1404183254Ssam IEEE80211_CHAN_HT20 : 0; 1405183254Ssam /* NB: honor operating mode constraint */ 1406183254Ssam if ((htinfo->hi_byte1 & IEEE80211_HTINFO_TXWIDTH_2040) && 1407193655Ssam (vap->iv_flags_ht & IEEE80211_FHT_USEHT40)) { 1408183254Ssam if (ni->ni_ht2ndchan == IEEE80211_HTINFO_2NDCHAN_ABOVE) 1409183254Ssam htflags = IEEE80211_CHAN_HT40U; 1410183254Ssam else if (ni->ni_ht2ndchan == IEEE80211_HTINFO_2NDCHAN_BELOW) 1411183254Ssam htflags = IEEE80211_CHAN_HT40D; 1412183254Ssam } 1413183254Ssam htinfo_update_chw(ni, htflags); 1414183256Ssam 1415183256Ssam if ((htinfo->hi_byte1 & IEEE80211_HTINFO_RIFSMODE_PERM) && 1416193655Ssam (vap->iv_flags_ht & IEEE80211_FHT_RIFS)) 1417183256Ssam ni->ni_flags |= IEEE80211_NODE_RIFS; 1418183256Ssam else 1419183256Ssam ni->ni_flags &= ~IEEE80211_NODE_RIFS; 1420183254Ssam} 1421183254Ssam 1422183254Ssam/* 1423183254Ssam * Parse and update HT-related state extracted from the HT cap ie 1424183254Ssam * for a station joining an HT BSS. 1425183254Ssam */ 1426183254Ssamvoid 1427183254Ssamieee80211_ht_updatehtcap(struct ieee80211_node *ni, const uint8_t *htcapie) 1428183254Ssam{ 1429183254Ssam struct ieee80211vap *vap = ni->ni_vap; 1430183254Ssam int htflags; 1431183254Ssam 1432183254Ssam ieee80211_parse_htcap(ni, htcapie); 1433183255Ssam if (vap->iv_htcaps & IEEE80211_HTCAP_SMPS) 1434183255Ssam htcap_update_mimo_ps(ni); 1435183257Ssam htcap_update_shortgi(ni); 1436183254Ssam 1437183254Ssam /* NB: honor operating mode constraint */ 1438183254Ssam /* XXX 40 MHZ intolerant */ 1439193655Ssam htflags = (vap->iv_flags_ht & IEEE80211_FHT_HT) ? 1440183254Ssam IEEE80211_CHAN_HT20 : 0; 1441183254Ssam if ((ni->ni_htcap & IEEE80211_HTCAP_CHWIDTH40) && 1442193655Ssam (vap->iv_flags_ht & IEEE80211_FHT_USEHT40)) { 1443183254Ssam if (IEEE80211_IS_CHAN_HT40U(vap->iv_bss->ni_chan)) 1444183254Ssam htflags = IEEE80211_CHAN_HT40U; 1445183254Ssam else if (IEEE80211_IS_CHAN_HT40D(vap->iv_bss->ni_chan)) 1446183254Ssam htflags = IEEE80211_CHAN_HT40D; 1447183254Ssam } 1448183254Ssam htinfo_update_chw(ni, htflags); 1449183254Ssam} 1450183254Ssam 1451183254Ssam/* 1452170530Ssam * Install received HT rate set by parsing the HT cap ie. 1453170530Ssam */ 1454170530Ssamint 1455170530Ssamieee80211_setup_htrates(struct ieee80211_node *ni, const uint8_t *ie, int flags) 1456170530Ssam{ 1457178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1458170530Ssam const struct ieee80211_ie_htcap *htcap; 1459170530Ssam struct ieee80211_htrateset *rs; 1460170530Ssam int i; 1461170530Ssam 1462170530Ssam rs = &ni->ni_htrates; 1463170530Ssam memset(rs, 0, sizeof(*rs)); 1464170530Ssam if (ie != NULL) { 1465170530Ssam if (ie[0] == IEEE80211_ELEMID_VENDOR) 1466170530Ssam ie += 4; 1467170530Ssam htcap = (const struct ieee80211_ie_htcap *) ie; 1468170530Ssam for (i = 0; i < IEEE80211_HTRATE_MAXSIZE; i++) { 1469170530Ssam if (isclr(htcap->hc_mcsset, i)) 1470170530Ssam continue; 1471170530Ssam if (rs->rs_nrates == IEEE80211_HTRATE_MAXSIZE) { 1472178354Ssam IEEE80211_NOTE(vap, 1473170530Ssam IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni, 1474170530Ssam "WARNING, HT rate set too large; only " 1475170530Ssam "using %u rates", IEEE80211_HTRATE_MAXSIZE); 1476178354Ssam vap->iv_stats.is_rx_rstoobig++; 1477170530Ssam break; 1478170530Ssam } 1479170530Ssam rs->rs_rates[rs->rs_nrates++] = i; 1480170530Ssam } 1481170530Ssam } 1482170530Ssam return ieee80211_fix_rate(ni, (struct ieee80211_rateset *) rs, flags); 1483170530Ssam} 1484170530Ssam 1485170530Ssam/* 1486170530Ssam * Mark rates in a node's HT rate set as basic according 1487170530Ssam * to the information in the supplied HT info ie. 1488170530Ssam */ 1489170530Ssamvoid 1490170530Ssamieee80211_setup_basic_htrates(struct ieee80211_node *ni, const uint8_t *ie) 1491170530Ssam{ 1492170530Ssam const struct ieee80211_ie_htinfo *htinfo; 1493170530Ssam struct ieee80211_htrateset *rs; 1494170530Ssam int i, j; 1495170530Ssam 1496170530Ssam if (ie[0] == IEEE80211_ELEMID_VENDOR) 1497170530Ssam ie += 4; 1498170530Ssam htinfo = (const struct ieee80211_ie_htinfo *) ie; 1499170530Ssam rs = &ni->ni_htrates; 1500170530Ssam if (rs->rs_nrates == 0) { 1501178354Ssam IEEE80211_NOTE(ni->ni_vap, 1502170530Ssam IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni, 1503170530Ssam "%s", "WARNING, empty HT rate set"); 1504170530Ssam return; 1505170530Ssam } 1506170530Ssam for (i = 0; i < IEEE80211_HTRATE_MAXSIZE; i++) { 1507170530Ssam if (isclr(htinfo->hi_basicmcsset, i)) 1508170530Ssam continue; 1509170530Ssam for (j = 0; j < rs->rs_nrates; j++) 1510170530Ssam if ((rs->rs_rates[j] & IEEE80211_RATE_VAL) == i) 1511170530Ssam rs->rs_rates[j] |= IEEE80211_RATE_BASIC; 1512170530Ssam } 1513170530Ssam} 1514170530Ssam 1515170530Ssamstatic void 1516184280Ssamampdu_tx_setup(struct ieee80211_tx_ampdu *tap) 1517184280Ssam{ 1518184280Ssam callout_init(&tap->txa_timer, CALLOUT_MPSAFE); 1519184280Ssam tap->txa_flags |= IEEE80211_AGGR_SETUP; 1520184280Ssam} 1521184280Ssam 1522184280Ssamstatic void 1523184280Ssamampdu_tx_stop(struct ieee80211_tx_ampdu *tap) 1524184280Ssam{ 1525184280Ssam struct ieee80211_node *ni = tap->txa_ni; 1526184280Ssam struct ieee80211com *ic = ni->ni_ic; 1527184280Ssam 1528184280Ssam KASSERT(tap->txa_flags & IEEE80211_AGGR_SETUP, 1529184280Ssam ("txa_flags 0x%x ac %d", tap->txa_flags, tap->txa_ac)); 1530184280Ssam 1531184280Ssam /* 1532184280Ssam * Stop BA stream if setup so driver has a chance 1533184280Ssam * to reclaim any resources it might have allocated. 1534184280Ssam */ 1535184280Ssam ic->ic_addba_stop(ni, tap); 1536184280Ssam /* 1537184280Ssam * Stop any pending BAR transmit. 1538184280Ssam */ 1539184280Ssam bar_stop_timer(tap); 1540184280Ssam 1541184280Ssam tap->txa_lastsample = 0; 1542184280Ssam tap->txa_avgpps = 0; 1543184280Ssam /* NB: clearing NAK means we may re-send ADDBA */ 1544184280Ssam tap->txa_flags &= ~(IEEE80211_AGGR_SETUP | IEEE80211_AGGR_NAK); 1545184280Ssam} 1546184280Ssam 1547184280Ssamstatic void 1548170530Ssamaddba_timeout(void *arg) 1549170530Ssam{ 1550170530Ssam struct ieee80211_tx_ampdu *tap = arg; 1551170530Ssam 1552170530Ssam /* XXX ? */ 1553170530Ssam tap->txa_flags &= ~IEEE80211_AGGR_XCHGPEND; 1554170530Ssam tap->txa_attempts++; 1555170530Ssam} 1556170530Ssam 1557170530Ssamstatic void 1558170530Ssamaddba_start_timeout(struct ieee80211_tx_ampdu *tap) 1559170530Ssam{ 1560170530Ssam /* XXX use CALLOUT_PENDING instead? */ 1561178354Ssam callout_reset(&tap->txa_timer, ieee80211_addba_timeout, 1562170530Ssam addba_timeout, tap); 1563170530Ssam tap->txa_flags |= IEEE80211_AGGR_XCHGPEND; 1564178354Ssam tap->txa_nextrequest = ticks + ieee80211_addba_timeout; 1565170530Ssam} 1566170530Ssam 1567170530Ssamstatic void 1568170530Ssamaddba_stop_timeout(struct ieee80211_tx_ampdu *tap) 1569170530Ssam{ 1570170530Ssam /* XXX use CALLOUT_PENDING instead? */ 1571170530Ssam if (tap->txa_flags & IEEE80211_AGGR_XCHGPEND) { 1572170530Ssam callout_stop(&tap->txa_timer); 1573170530Ssam tap->txa_flags &= ~IEEE80211_AGGR_XCHGPEND; 1574170530Ssam } 1575170530Ssam} 1576170530Ssam 1577170530Ssam/* 1578170530Ssam * Default method for requesting A-MPDU tx aggregation. 1579170530Ssam * We setup the specified state block and start a timer 1580170530Ssam * to wait for an ADDBA response frame. 1581170530Ssam */ 1582170530Ssamstatic int 1583170530Ssamieee80211_addba_request(struct ieee80211_node *ni, 1584170530Ssam struct ieee80211_tx_ampdu *tap, 1585170530Ssam int dialogtoken, int baparamset, int batimeout) 1586170530Ssam{ 1587170530Ssam int bufsiz; 1588170530Ssam 1589170530Ssam /* XXX locking */ 1590170530Ssam tap->txa_token = dialogtoken; 1591170530Ssam tap->txa_flags |= IEEE80211_AGGR_IMMEDIATE; 1592170530Ssam bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ); 1593170530Ssam tap->txa_wnd = (bufsiz == 0) ? 1594170530Ssam IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX); 1595170530Ssam addba_start_timeout(tap); 1596170530Ssam return 1; 1597170530Ssam} 1598170530Ssam 1599170530Ssam/* 1600170530Ssam * Default method for processing an A-MPDU tx aggregation 1601170530Ssam * response. We shutdown any pending timer and update the 1602170530Ssam * state block according to the reply. 1603170530Ssam */ 1604170530Ssamstatic int 1605170530Ssamieee80211_addba_response(struct ieee80211_node *ni, 1606170530Ssam struct ieee80211_tx_ampdu *tap, 1607170530Ssam int status, int baparamset, int batimeout) 1608170530Ssam{ 1609184280Ssam int bufsiz, tid; 1610170530Ssam 1611170530Ssam /* XXX locking */ 1612170530Ssam addba_stop_timeout(tap); 1613170530Ssam if (status == IEEE80211_STATUS_SUCCESS) { 1614170530Ssam bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ); 1615170530Ssam /* XXX override our request? */ 1616170530Ssam tap->txa_wnd = (bufsiz == 0) ? 1617170530Ssam IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX); 1618184280Ssam /* XXX AC/TID */ 1619184280Ssam tid = MS(baparamset, IEEE80211_BAPS_TID); 1620170530Ssam tap->txa_flags |= IEEE80211_AGGR_RUNNING; 1621184280Ssam tap->txa_attempts = 0; 1622173273Ssam } else { 1623173273Ssam /* mark tid so we don't try again */ 1624173273Ssam tap->txa_flags |= IEEE80211_AGGR_NAK; 1625170530Ssam } 1626170530Ssam return 1; 1627170530Ssam} 1628170530Ssam 1629170530Ssam/* 1630170530Ssam * Default method for stopping A-MPDU tx aggregation. 1631170530Ssam * Any timer is cleared and we drain any pending frames. 1632170530Ssam */ 1633170530Ssamstatic void 1634170530Ssamieee80211_addba_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap) 1635170530Ssam{ 1636170530Ssam /* XXX locking */ 1637170530Ssam addba_stop_timeout(tap); 1638170530Ssam if (tap->txa_flags & IEEE80211_AGGR_RUNNING) { 1639182830Ssam /* XXX clear aggregation queue */ 1640170530Ssam tap->txa_flags &= ~IEEE80211_AGGR_RUNNING; 1641170530Ssam } 1642170530Ssam tap->txa_attempts = 0; 1643170530Ssam} 1644170530Ssam 1645170530Ssam/* 1646170530Ssam * Process a received action frame using the default aggregation 1647170530Ssam * policy. We intercept ADDBA-related frames and use them to 1648170530Ssam * update our aggregation state. All other frames are passed up 1649170530Ssam * for processing by ieee80211_recv_action. 1650170530Ssam */ 1651195377Ssamstatic int 1652195377Ssamht_recv_action_ba_addba_request(struct ieee80211_node *ni, 1653195377Ssam const struct ieee80211_frame *wh, 1654170530Ssam const uint8_t *frm, const uint8_t *efrm) 1655170530Ssam{ 1656170530Ssam struct ieee80211com *ic = ni->ni_ic; 1657178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1658170530Ssam struct ieee80211_rx_ampdu *rap; 1659195377Ssam uint8_t dialogtoken; 1660195377Ssam uint16_t baparamset, batimeout, baseqctl; 1661205277Srpaulo uint16_t args[5]; 1662195377Ssam int tid; 1663170530Ssam 1664195377Ssam dialogtoken = frm[2]; 1665195377Ssam baparamset = LE_READ_2(frm+3); 1666195377Ssam batimeout = LE_READ_2(frm+5); 1667195377Ssam baseqctl = LE_READ_2(frm+7); 1668170530Ssam 1669195377Ssam tid = MS(baparamset, IEEE80211_BAPS_TID); 1670170530Ssam 1671195377Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 1672195377Ssam "recv ADDBA request: dialogtoken %u baparamset 0x%x " 1673195377Ssam "(tid %d bufsiz %d) batimeout %d baseqctl %d:%d", 1674195377Ssam dialogtoken, baparamset, 1675195377Ssam tid, MS(baparamset, IEEE80211_BAPS_BUFSIZ), 1676195377Ssam batimeout, 1677195377Ssam MS(baseqctl, IEEE80211_BASEQ_START), 1678195377Ssam MS(baseqctl, IEEE80211_BASEQ_FRAG)); 1679170530Ssam 1680195377Ssam rap = &ni->ni_rx_ampdu[tid]; 1681170530Ssam 1682195377Ssam /* Send ADDBA response */ 1683195377Ssam args[0] = dialogtoken; 1684195377Ssam /* 1685195377Ssam * NB: We ack only if the sta associated with HT and 1686195377Ssam * the ap is configured to do AMPDU rx (the latter 1687195377Ssam * violates the 11n spec and is mostly for testing). 1688195377Ssam */ 1689195377Ssam if ((ni->ni_flags & IEEE80211_NODE_AMPDU_RX) && 1690195377Ssam (vap->iv_flags_ht & IEEE80211_FHT_AMPDU_RX)) { 1691195377Ssam /* XXX handle ampdu_rx_start failure */ 1692195377Ssam ic->ic_ampdu_rx_start(ni, rap, 1693195377Ssam baparamset, batimeout, baseqctl); 1694170530Ssam 1695195377Ssam args[1] = IEEE80211_STATUS_SUCCESS; 1696195377Ssam } else { 1697195377Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 1698195377Ssam ni, "reject ADDBA request: %s", 1699195377Ssam ni->ni_flags & IEEE80211_NODE_AMPDU_RX ? 1700195377Ssam "administratively disabled" : 1701195377Ssam "not negotiated for station"); 1702195377Ssam vap->iv_stats.is_addba_reject++; 1703195377Ssam args[1] = IEEE80211_STATUS_UNSPECIFIED; 1704195377Ssam } 1705195377Ssam /* XXX honor rap flags? */ 1706195377Ssam args[2] = IEEE80211_BAPS_POLICY_IMMEDIATE 1707195377Ssam | SM(tid, IEEE80211_BAPS_TID) 1708195377Ssam | SM(rap->rxa_wnd, IEEE80211_BAPS_BUFSIZ) 1709195377Ssam ; 1710195377Ssam args[3] = 0; 1711205277Srpaulo args[4] = 0; 1712195377Ssam ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA, 1713195377Ssam IEEE80211_ACTION_BA_ADDBA_RESPONSE, args); 1714195377Ssam return 0; 1715195377Ssam} 1716170530Ssam 1717195377Ssamstatic int 1718195377Ssamht_recv_action_ba_addba_response(struct ieee80211_node *ni, 1719195377Ssam const struct ieee80211_frame *wh, 1720195377Ssam const uint8_t *frm, const uint8_t *efrm) 1721195377Ssam{ 1722195377Ssam struct ieee80211com *ic = ni->ni_ic; 1723195377Ssam struct ieee80211vap *vap = ni->ni_vap; 1724195377Ssam struct ieee80211_tx_ampdu *tap; 1725195377Ssam uint8_t dialogtoken, policy; 1726195377Ssam uint16_t baparamset, batimeout, code; 1727195377Ssam int tid, ac, bufsiz; 1728170530Ssam 1729195377Ssam dialogtoken = frm[2]; 1730195377Ssam code = LE_READ_2(frm+3); 1731195377Ssam baparamset = LE_READ_2(frm+5); 1732195377Ssam tid = MS(baparamset, IEEE80211_BAPS_TID); 1733195377Ssam bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ); 1734195377Ssam policy = MS(baparamset, IEEE80211_BAPS_POLICY); 1735195377Ssam batimeout = LE_READ_2(frm+7); 1736195377Ssam 1737195377Ssam ac = TID_TO_WME_AC(tid); 1738195377Ssam tap = &ni->ni_tx_ampdu[ac]; 1739195377Ssam if ((tap->txa_flags & IEEE80211_AGGR_XCHGPEND) == 0) { 1740195377Ssam IEEE80211_DISCARD_MAC(vap, 1741195377Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 1742195377Ssam ni->ni_macaddr, "ADDBA response", 1743195377Ssam "no pending ADDBA, tid %d dialogtoken %u " 1744195377Ssam "code %d", tid, dialogtoken, code); 1745195377Ssam vap->iv_stats.is_addba_norequest++; 1746195377Ssam return 0; 1747195377Ssam } 1748195377Ssam if (dialogtoken != tap->txa_token) { 1749195377Ssam IEEE80211_DISCARD_MAC(vap, 1750195377Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 1751195377Ssam ni->ni_macaddr, "ADDBA response", 1752195377Ssam "dialogtoken mismatch: waiting for %d, " 1753195377Ssam "received %d, tid %d code %d", 1754195377Ssam tap->txa_token, dialogtoken, tid, code); 1755195377Ssam vap->iv_stats.is_addba_badtoken++; 1756195377Ssam return 0; 1757195377Ssam } 1758195377Ssam /* NB: assumes IEEE80211_AGGR_IMMEDIATE is 1 */ 1759195377Ssam if (policy != (tap->txa_flags & IEEE80211_AGGR_IMMEDIATE)) { 1760195377Ssam IEEE80211_DISCARD_MAC(vap, 1761195377Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 1762195377Ssam ni->ni_macaddr, "ADDBA response", 1763195377Ssam "policy mismatch: expecting %s, " 1764195377Ssam "received %s, tid %d code %d", 1765195377Ssam tap->txa_flags & IEEE80211_AGGR_IMMEDIATE, 1766195377Ssam policy, tid, code); 1767195377Ssam vap->iv_stats.is_addba_badpolicy++; 1768195377Ssam return 0; 1769195377Ssam } 1770182829Ssam#if 0 1771195377Ssam /* XXX we take MIN in ieee80211_addba_response */ 1772195377Ssam if (bufsiz > IEEE80211_AGGR_BAWMAX) { 1773195377Ssam IEEE80211_DISCARD_MAC(vap, 1774195377Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 1775195377Ssam ni->ni_macaddr, "ADDBA response", 1776195377Ssam "BA window too large: max %d, " 1777195377Ssam "received %d, tid %d code %d", 1778195377Ssam bufsiz, IEEE80211_AGGR_BAWMAX, tid, code); 1779195377Ssam vap->iv_stats.is_addba_badbawinsize++; 1780195377Ssam return 0; 1781195377Ssam } 1782182829Ssam#endif 1783195377Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 1784195377Ssam "recv ADDBA response: dialogtoken %u code %d " 1785195377Ssam "baparamset 0x%x (tid %d bufsiz %d) batimeout %d", 1786195377Ssam dialogtoken, code, baparamset, tid, bufsiz, 1787195377Ssam batimeout); 1788195377Ssam ic->ic_addba_response(ni, tap, code, baparamset, batimeout); 1789195377Ssam return 0; 1790195377Ssam} 1791170530Ssam 1792195377Ssamstatic int 1793195377Ssamht_recv_action_ba_delba(struct ieee80211_node *ni, 1794195377Ssam const struct ieee80211_frame *wh, 1795195377Ssam const uint8_t *frm, const uint8_t *efrm) 1796195377Ssam{ 1797195377Ssam struct ieee80211com *ic = ni->ni_ic; 1798195377Ssam struct ieee80211_rx_ampdu *rap; 1799195377Ssam struct ieee80211_tx_ampdu *tap; 1800195377Ssam uint16_t baparamset, code; 1801195377Ssam int tid, ac; 1802170530Ssam 1803195377Ssam baparamset = LE_READ_2(frm+2); 1804195377Ssam code = LE_READ_2(frm+4); 1805170530Ssam 1806195377Ssam tid = MS(baparamset, IEEE80211_DELBAPS_TID); 1807170530Ssam 1808195377Ssam IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 1809195377Ssam "recv DELBA: baparamset 0x%x (tid %d initiator %d) " 1810195377Ssam "code %d", baparamset, tid, 1811195377Ssam MS(baparamset, IEEE80211_DELBAPS_INIT), code); 1812195377Ssam 1813195377Ssam if ((baparamset & IEEE80211_DELBAPS_INIT) == 0) { 1814195377Ssam ac = TID_TO_WME_AC(tid); 1815195377Ssam tap = &ni->ni_tx_ampdu[ac]; 1816195377Ssam ic->ic_addba_stop(ni, tap); 1817195377Ssam } else { 1818195377Ssam rap = &ni->ni_rx_ampdu[tid]; 1819195377Ssam ic->ic_ampdu_rx_stop(ni, rap); 1820170530Ssam } 1821195377Ssam return 0; 1822170530Ssam} 1823170530Ssam 1824195377Ssamstatic int 1825195377Ssamht_recv_action_ht_txchwidth(struct ieee80211_node *ni, 1826195377Ssam const struct ieee80211_frame *wh, 1827170530Ssam const uint8_t *frm, const uint8_t *efrm) 1828170530Ssam{ 1829170530Ssam int chw; 1830170530Ssam 1831195377Ssam chw = (frm[2] == IEEE80211_A_HT_TXCHWIDTH_2040) ? 40 : 20; 1832195377Ssam 1833195377Ssam IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 1834195377Ssam "%s: HT txchwidth, width %d%s", 1835195377Ssam __func__, chw, ni->ni_chw != chw ? "*" : ""); 1836195377Ssam if (chw != ni->ni_chw) { 1837195377Ssam ni->ni_chw = chw; 1838195377Ssam /* XXX notify on change */ 1839170530Ssam } 1840195377Ssam return 0; 1841170530Ssam} 1842170530Ssam 1843195377Ssamstatic int 1844195377Ssamht_recv_action_ht_mimopwrsave(struct ieee80211_node *ni, 1845195377Ssam const struct ieee80211_frame *wh, 1846195377Ssam const uint8_t *frm, const uint8_t *efrm) 1847195377Ssam{ 1848195377Ssam const struct ieee80211_action_ht_mimopowersave *mps = 1849195377Ssam (const struct ieee80211_action_ht_mimopowersave *) frm; 1850195377Ssam 1851195377Ssam /* XXX check iv_htcaps */ 1852195377Ssam if (mps->am_control & IEEE80211_A_HT_MIMOPWRSAVE_ENA) 1853195377Ssam ni->ni_flags |= IEEE80211_NODE_MIMO_PS; 1854195377Ssam else 1855195377Ssam ni->ni_flags &= ~IEEE80211_NODE_MIMO_PS; 1856195377Ssam if (mps->am_control & IEEE80211_A_HT_MIMOPWRSAVE_MODE) 1857195377Ssam ni->ni_flags |= IEEE80211_NODE_MIMO_RTS; 1858195377Ssam else 1859195377Ssam ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS; 1860195377Ssam /* XXX notify on change */ 1861195377Ssam IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 1862195377Ssam "%s: HT MIMO PS (%s%s)", __func__, 1863195377Ssam (ni->ni_flags & IEEE80211_NODE_MIMO_PS) ? "on" : "off", 1864195377Ssam (ni->ni_flags & IEEE80211_NODE_MIMO_RTS) ? "+rts" : "" 1865195377Ssam ); 1866195377Ssam return 0; 1867195377Ssam} 1868195377Ssam 1869170530Ssam/* 1870170530Ssam * Transmit processing. 1871170530Ssam */ 1872170530Ssam 1873170530Ssam/* 1874178354Ssam * Check if A-MPDU should be requested/enabled for a stream. 1875178354Ssam * We require a traffic rate above a per-AC threshold and we 1876178354Ssam * also handle backoff from previous failed attempts. 1877178354Ssam * 1878178354Ssam * Drivers may override this method to bring in information 1879178354Ssam * such as link state conditions in making the decision. 1880178354Ssam */ 1881178354Ssamstatic int 1882178354Ssamieee80211_ampdu_enable(struct ieee80211_node *ni, 1883178354Ssam struct ieee80211_tx_ampdu *tap) 1884178354Ssam{ 1885178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1886178354Ssam 1887178354Ssam if (tap->txa_avgpps < vap->iv_ampdu_mintraffic[tap->txa_ac]) 1888178354Ssam return 0; 1889178354Ssam /* XXX check rssi? */ 1890178354Ssam if (tap->txa_attempts >= ieee80211_addba_maxtries && 1891178354Ssam ticks < tap->txa_nextrequest) { 1892178354Ssam /* 1893178354Ssam * Don't retry too often; txa_nextrequest is set 1894178354Ssam * to the minimum interval we'll retry after 1895178354Ssam * ieee80211_addba_maxtries failed attempts are made. 1896178354Ssam */ 1897178354Ssam return 0; 1898178354Ssam } 1899178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni, 1900183249Ssam "enable AMPDU on %s, avgpps %d pkts %d", 1901183249Ssam ieee80211_wme_acnames[tap->txa_ac], tap->txa_avgpps, tap->txa_pkts); 1902178354Ssam return 1; 1903178354Ssam} 1904178354Ssam 1905178354Ssam/* 1906170530Ssam * Request A-MPDU tx aggregation. Setup local state and 1907170530Ssam * issue an ADDBA request. BA use will only happen after 1908170530Ssam * the other end replies with ADDBA response. 1909170530Ssam */ 1910170530Ssamint 1911170530Ssamieee80211_ampdu_request(struct ieee80211_node *ni, 1912170530Ssam struct ieee80211_tx_ampdu *tap) 1913170530Ssam{ 1914170530Ssam struct ieee80211com *ic = ni->ni_ic; 1915205277Srpaulo uint16_t args[5]; 1916170530Ssam int tid, dialogtoken; 1917170530Ssam static int tokens = 0; /* XXX */ 1918170530Ssam 1919170530Ssam /* XXX locking */ 1920170530Ssam if ((tap->txa_flags & IEEE80211_AGGR_SETUP) == 0) { 1921170530Ssam /* do deferred setup of state */ 1922184280Ssam ampdu_tx_setup(tap); 1923170530Ssam } 1924173273Ssam /* XXX hack for not doing proper locking */ 1925173273Ssam tap->txa_flags &= ~IEEE80211_AGGR_NAK; 1926173273Ssam 1927170530Ssam dialogtoken = (tokens+1) % 63; /* XXX */ 1928183245Ssam tid = WME_AC_TO_TID(tap->txa_ac); 1929183245Ssam tap->txa_start = ni->ni_txseqs[tid]; 1930170530Ssam 1931170530Ssam args[0] = dialogtoken; 1932205277Srpaulo args[1] = 0; /* NB: status code not used */ 1933205277Srpaulo args[2] = IEEE80211_BAPS_POLICY_IMMEDIATE 1934170530Ssam | SM(tid, IEEE80211_BAPS_TID) 1935170530Ssam | SM(IEEE80211_AGGR_BAWMAX, IEEE80211_BAPS_BUFSIZ) 1936170530Ssam ; 1937205277Srpaulo args[3] = 0; /* batimeout */ 1938170530Ssam /* NB: do first so there's no race against reply */ 1939205277Srpaulo if (!ic->ic_addba_request(ni, tap, dialogtoken, args[2], args[3])) { 1940170530Ssam /* unable to setup state, don't make request */ 1941178354Ssam IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 1942173273Ssam ni, "%s: could not setup BA stream for AC %d", 1943173273Ssam __func__, tap->txa_ac); 1944173273Ssam /* defer next try so we don't slam the driver with requests */ 1945178354Ssam tap->txa_attempts = ieee80211_addba_maxtries; 1946178354Ssam /* NB: check in case driver wants to override */ 1947178354Ssam if (tap->txa_nextrequest <= ticks) 1948178354Ssam tap->txa_nextrequest = ticks + ieee80211_addba_backoff; 1949170530Ssam return 0; 1950170530Ssam } 1951170530Ssam tokens = dialogtoken; /* allocate token */ 1952183245Ssam /* NB: after calling ic_addba_request so driver can set txa_start */ 1953205277Srpaulo args[4] = SM(tap->txa_start, IEEE80211_BASEQ_START) 1954178953Ssam | SM(0, IEEE80211_BASEQ_FRAG) 1955178953Ssam ; 1956170530Ssam return ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA, 1957170530Ssam IEEE80211_ACTION_BA_ADDBA_REQUEST, args); 1958170530Ssam} 1959170530Ssam 1960170530Ssam/* 1961173273Ssam * Terminate an AMPDU tx stream. State is reclaimed 1962173273Ssam * and the peer notified with a DelBA Action frame. 1963173273Ssam */ 1964173273Ssamvoid 1965183250Ssamieee80211_ampdu_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 1966183250Ssam int reason) 1967173273Ssam{ 1968173273Ssam struct ieee80211com *ic = ni->ni_ic; 1969178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1970173273Ssam uint16_t args[4]; 1971173273Ssam 1972173273Ssam /* XXX locking */ 1973184280Ssam tap->txa_flags &= ~IEEE80211_AGGR_BARPEND; 1974173273Ssam if (IEEE80211_AMPDU_RUNNING(tap)) { 1975178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 1976183250Ssam ni, "%s: stop BA stream for AC %d (reason %d)", 1977183250Ssam __func__, tap->txa_ac, reason); 1978178354Ssam vap->iv_stats.is_ampdu_stop++; 1979173273Ssam 1980173273Ssam ic->ic_addba_stop(ni, tap); 1981173273Ssam args[0] = WME_AC_TO_TID(tap->txa_ac); 1982173273Ssam args[1] = IEEE80211_DELBAPS_INIT; 1983183250Ssam args[2] = reason; /* XXX reason code */ 1984195377Ssam ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA, 1985173273Ssam IEEE80211_ACTION_BA_DELBA, args); 1986173273Ssam } else { 1987178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 1988183250Ssam ni, "%s: BA stream for AC %d not running (reason %d)", 1989183250Ssam __func__, tap->txa_ac, reason); 1990178354Ssam vap->iv_stats.is_ampdu_stop_failed++; 1991173273Ssam } 1992173273Ssam} 1993173273Ssam 1994184280Ssamstatic void 1995184280Ssambar_timeout(void *arg) 1996184280Ssam{ 1997184280Ssam struct ieee80211_tx_ampdu *tap = arg; 1998184280Ssam struct ieee80211_node *ni = tap->txa_ni; 1999184280Ssam 2000184280Ssam KASSERT((tap->txa_flags & IEEE80211_AGGR_XCHGPEND) == 0, 2001184280Ssam ("bar/addba collision, flags 0x%x", tap->txa_flags)); 2002184280Ssam 2003184280Ssam IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 2004184280Ssam ni, "%s: tid %u flags 0x%x attempts %d", __func__, 2005184280Ssam tap->txa_ac, tap->txa_flags, tap->txa_attempts); 2006184280Ssam 2007184280Ssam /* guard against race with bar_tx_complete */ 2008184280Ssam if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) == 0) 2009184280Ssam return; 2010184280Ssam /* XXX ? */ 2011184280Ssam if (tap->txa_attempts >= ieee80211_bar_maxtries) 2012184280Ssam ieee80211_ampdu_stop(ni, tap, IEEE80211_REASON_TIMEOUT); 2013184280Ssam else 2014184280Ssam ieee80211_send_bar(ni, tap, tap->txa_seqpending); 2015184280Ssam} 2016184280Ssam 2017184280Ssamstatic void 2018184280Ssambar_start_timer(struct ieee80211_tx_ampdu *tap) 2019184280Ssam{ 2020184280Ssam callout_reset(&tap->txa_timer, ieee80211_bar_timeout, bar_timeout, tap); 2021184280Ssam} 2022184280Ssam 2023184280Ssamstatic void 2024184280Ssambar_stop_timer(struct ieee80211_tx_ampdu *tap) 2025184280Ssam{ 2026184280Ssam callout_stop(&tap->txa_timer); 2027184280Ssam} 2028184280Ssam 2029184280Ssamstatic void 2030184280Ssambar_tx_complete(struct ieee80211_node *ni, void *arg, int status) 2031184280Ssam{ 2032184280Ssam struct ieee80211_tx_ampdu *tap = arg; 2033184280Ssam 2034184280Ssam IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 2035184280Ssam ni, "%s: tid %u flags 0x%x pending %d status %d", 2036184280Ssam __func__, tap->txa_ac, tap->txa_flags, 2037184280Ssam callout_pending(&tap->txa_timer), status); 2038184280Ssam 2039184280Ssam /* XXX locking */ 2040184280Ssam if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) && 2041184280Ssam callout_pending(&tap->txa_timer)) { 2042184280Ssam struct ieee80211com *ic = ni->ni_ic; 2043184280Ssam 2044184280Ssam if (status) /* ACK'd */ 2045184280Ssam bar_stop_timer(tap); 2046184280Ssam ic->ic_bar_response(ni, tap, status); 2047184280Ssam /* NB: just let timer expire so we pace requests */ 2048184280Ssam } 2049184280Ssam} 2050184280Ssam 2051184280Ssamstatic void 2052184280Ssamieee80211_bar_response(struct ieee80211_node *ni, 2053184280Ssam struct ieee80211_tx_ampdu *tap, int status) 2054184280Ssam{ 2055184280Ssam 2056184280Ssam if (status != 0) { /* got ACK */ 2057184280Ssam IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 2058184280Ssam ni, "BAR moves BA win <%u:%u> (%u frames) txseq %u tid %u", 2059184280Ssam tap->txa_start, 2060184280Ssam IEEE80211_SEQ_ADD(tap->txa_start, tap->txa_wnd-1), 2061184280Ssam tap->txa_qframes, tap->txa_seqpending, 2062184280Ssam WME_AC_TO_TID(tap->txa_ac)); 2063184280Ssam 2064184280Ssam /* NB: timer already stopped in bar_tx_complete */ 2065184280Ssam tap->txa_start = tap->txa_seqpending; 2066184280Ssam tap->txa_flags &= ~IEEE80211_AGGR_BARPEND; 2067184280Ssam } 2068184280Ssam} 2069184280Ssam 2070173273Ssam/* 2071170530Ssam * Transmit a BAR frame to the specified node. The 2072170530Ssam * BAR contents are drawn from the supplied aggregation 2073170530Ssam * state associated with the node. 2074184280Ssam * 2075184280Ssam * NB: we only handle immediate ACK w/ compressed bitmap. 2076170530Ssam */ 2077170530Ssamint 2078170530Ssamieee80211_send_bar(struct ieee80211_node *ni, 2079184280Ssam struct ieee80211_tx_ampdu *tap, ieee80211_seq seq) 2080170530Ssam{ 2081178354Ssam#define senderr(_x, _v) do { vap->iv_stats._v++; ret = _x; goto bad; } while (0) 2082178354Ssam struct ieee80211vap *vap = ni->ni_vap; 2083170530Ssam struct ieee80211com *ic = ni->ni_ic; 2084184280Ssam struct ieee80211_frame_bar *bar; 2085170530Ssam struct mbuf *m; 2086184280Ssam uint16_t barctl, barseqctl; 2087170530Ssam uint8_t *frm; 2088170530Ssam int tid, ret; 2089170530Ssam 2090184280Ssam if ((tap->txa_flags & IEEE80211_AGGR_RUNNING) == 0) { 2091184280Ssam /* no ADDBA response, should not happen */ 2092184280Ssam /* XXX stat+msg */ 2093184280Ssam return EINVAL; 2094184280Ssam } 2095184280Ssam /* XXX locking */ 2096184280Ssam bar_stop_timer(tap); 2097184280Ssam 2098170530Ssam ieee80211_ref_node(ni); 2099170530Ssam 2100184280Ssam m = ieee80211_getmgtframe(&frm, ic->ic_headroom, sizeof(*bar)); 2101170530Ssam if (m == NULL) 2102170530Ssam senderr(ENOMEM, is_tx_nobuf); 2103170530Ssam 2104184280Ssam if (!ieee80211_add_callback(m, bar_tx_complete, tap)) { 2105184280Ssam m_freem(m); 2106184280Ssam senderr(ENOMEM, is_tx_nobuf); /* XXX */ 2107184280Ssam /* NOTREACHED */ 2108184280Ssam } 2109184280Ssam 2110184280Ssam bar = mtod(m, struct ieee80211_frame_bar *); 2111184280Ssam bar->i_fc[0] = IEEE80211_FC0_VERSION_0 | 2112170530Ssam IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_BAR; 2113184280Ssam bar->i_fc[1] = 0; 2114184280Ssam IEEE80211_ADDR_COPY(bar->i_ra, ni->ni_macaddr); 2115184280Ssam IEEE80211_ADDR_COPY(bar->i_ta, vap->iv_myaddr); 2116170530Ssam 2117170530Ssam tid = WME_AC_TO_TID(tap->txa_ac); 2118170530Ssam barctl = (tap->txa_flags & IEEE80211_AGGR_IMMEDIATE ? 2119184280Ssam 0 : IEEE80211_BAR_NOACK) 2120184280Ssam | IEEE80211_BAR_COMP 2121184280Ssam | SM(tid, IEEE80211_BAR_TID) 2122170530Ssam ; 2123184280Ssam barseqctl = SM(seq, IEEE80211_BAR_SEQ_START); 2124184280Ssam /* NB: known to have proper alignment */ 2125184280Ssam bar->i_ctl = htole16(barctl); 2126184280Ssam bar->i_seq = htole16(barseqctl); 2127184280Ssam m->m_pkthdr.len = m->m_len = sizeof(struct ieee80211_frame_bar); 2128170530Ssam 2129178354Ssam M_WME_SETAC(m, WME_AC_VO); 2130178354Ssam 2131170530Ssam IEEE80211_NODE_STAT(ni, tx_mgmt); /* XXX tx_ctl? */ 2132170530Ssam 2133184280Ssam /* XXX locking */ 2134184280Ssam /* init/bump attempts counter */ 2135184280Ssam if ((tap->txa_flags & IEEE80211_AGGR_BARPEND) == 0) 2136184280Ssam tap->txa_attempts = 1; 2137184280Ssam else 2138184280Ssam tap->txa_attempts++; 2139184280Ssam tap->txa_seqpending = seq; 2140184280Ssam tap->txa_flags |= IEEE80211_AGGR_BARPEND; 2141170530Ssam 2142184280Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_11N, 2143184280Ssam ni, "send BAR: tid %u ctl 0x%x start %u (attempt %d)", 2144184280Ssam tid, barctl, seq, tap->txa_attempts); 2145184280Ssam 2146184280Ssam ret = ic->ic_raw_xmit(ni, m, NULL); 2147184280Ssam if (ret != 0) { 2148184280Ssam /* xmit failed, clear state flag */ 2149184280Ssam tap->txa_flags &= ~IEEE80211_AGGR_BARPEND; 2150184280Ssam goto bad; 2151184280Ssam } 2152184280Ssam /* XXX hack against tx complete happening before timer is started */ 2153184280Ssam if (tap->txa_flags & IEEE80211_AGGR_BARPEND) 2154184280Ssam bar_start_timer(tap); 2155184280Ssam return 0; 2156170530Ssambad: 2157170530Ssam ieee80211_free_node(ni); 2158170530Ssam return ret; 2159170530Ssam#undef senderr 2160170530Ssam} 2161170530Ssam 2162195377Ssamstatic int 2163195377Ssamht_action_output(struct ieee80211_node *ni, struct mbuf *m) 2164195377Ssam{ 2165195377Ssam struct ieee80211_bpf_params params; 2166195377Ssam 2167195377Ssam memset(¶ms, 0, sizeof(params)); 2168195377Ssam params.ibp_pri = WME_AC_VO; 2169195377Ssam params.ibp_rate0 = ni->ni_txparms->mgmtrate; 2170195377Ssam /* NB: we know all frames are unicast */ 2171195377Ssam params.ibp_try0 = ni->ni_txparms->maxretry; 2172195377Ssam params.ibp_power = ni->ni_txpower; 2173195377Ssam return ieee80211_mgmt_output(ni, m, IEEE80211_FC0_SUBTYPE_ACTION, 2174195377Ssam ¶ms); 2175195377Ssam} 2176195377Ssam 2177195377Ssam#define ADDSHORT(frm, v) do { \ 2178195377Ssam frm[0] = (v) & 0xff; \ 2179195377Ssam frm[1] = (v) >> 8; \ 2180195377Ssam frm += 2; \ 2181195377Ssam} while (0) 2182195377Ssam 2183170530Ssam/* 2184170530Ssam * Send an action management frame. The arguments are stuff 2185170530Ssam * into a frame without inspection; the caller is assumed to 2186170530Ssam * prepare them carefully (e.g. based on the aggregation state). 2187170530Ssam */ 2188195377Ssamstatic int 2189195377Ssamht_send_action_ba_addba(struct ieee80211_node *ni, 2190195377Ssam int category, int action, void *arg0) 2191170530Ssam{ 2192178354Ssam struct ieee80211vap *vap = ni->ni_vap; 2193170530Ssam struct ieee80211com *ic = ni->ni_ic; 2194195377Ssam uint16_t *args = arg0; 2195170530Ssam struct mbuf *m; 2196170530Ssam uint8_t *frm; 2197195377Ssam 2198195377Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 2199205277Srpaulo "send ADDBA %s: dialogtoken %d status %d " 2200195377Ssam "baparamset 0x%x (tid %d) batimeout 0x%x baseqctl 0x%x", 2201195377Ssam (action == IEEE80211_ACTION_BA_ADDBA_REQUEST) ? 2202195377Ssam "request" : "response", 2203205277Srpaulo args[0], args[1], args[2], MS(args[2], IEEE80211_BAPS_TID), 2204205277Srpaulo args[3], args[4]); 2205195377Ssam 2206195377Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2207195377Ssam "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2208195377Ssam ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2209195377Ssam ieee80211_ref_node(ni); 2210195377Ssam 2211195377Ssam m = ieee80211_getmgtframe(&frm, 2212195377Ssam ic->ic_headroom + sizeof(struct ieee80211_frame), 2213195377Ssam sizeof(uint16_t) /* action+category */ 2214195377Ssam /* XXX may action payload */ 2215195377Ssam + sizeof(struct ieee80211_action_ba_addbaresponse) 2216195377Ssam ); 2217195377Ssam if (m != NULL) { 2218195377Ssam *frm++ = category; 2219195377Ssam *frm++ = action; 2220195377Ssam *frm++ = args[0]; /* dialog token */ 2221205277Srpaulo if (action == IEEE80211_ACTION_BA_ADDBA_RESPONSE) 2222205277Srpaulo ADDSHORT(frm, args[1]); /* status code */ 2223205277Srpaulo ADDSHORT(frm, args[2]); /* baparamset */ 2224205277Srpaulo ADDSHORT(frm, args[3]); /* batimeout */ 2225195377Ssam if (action == IEEE80211_ACTION_BA_ADDBA_REQUEST) 2226205277Srpaulo ADDSHORT(frm, args[4]); /* baseqctl */ 2227195377Ssam m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2228195377Ssam return ht_action_output(ni, m); 2229195377Ssam } else { 2230195377Ssam vap->iv_stats.is_tx_nobuf++; 2231195377Ssam ieee80211_free_node(ni); 2232195377Ssam return ENOMEM; 2233195377Ssam } 2234195377Ssam} 2235195377Ssam 2236195377Ssamstatic int 2237195377Ssamht_send_action_ba_delba(struct ieee80211_node *ni, 2238195377Ssam int category, int action, void *arg0) 2239195377Ssam{ 2240195377Ssam struct ieee80211vap *vap = ni->ni_vap; 2241195377Ssam struct ieee80211com *ic = ni->ni_ic; 2242195377Ssam uint16_t *args = arg0; 2243195377Ssam struct mbuf *m; 2244170530Ssam uint16_t baparamset; 2245195377Ssam uint8_t *frm; 2246170530Ssam 2247195377Ssam baparamset = SM(args[0], IEEE80211_DELBAPS_TID) 2248195377Ssam | args[1] 2249195377Ssam ; 2250195377Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 2251195377Ssam "send DELBA action: tid %d, initiator %d reason %d", 2252195377Ssam args[0], args[1], args[2]); 2253170530Ssam 2254178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2255195377Ssam "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2256195377Ssam ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2257170530Ssam ieee80211_ref_node(ni); 2258170530Ssam 2259170530Ssam m = ieee80211_getmgtframe(&frm, 2260195377Ssam ic->ic_headroom + sizeof(struct ieee80211_frame), 2261195377Ssam sizeof(uint16_t) /* action+category */ 2262195377Ssam /* XXX may action payload */ 2263195377Ssam + sizeof(struct ieee80211_action_ba_addbaresponse) 2264170530Ssam ); 2265195377Ssam if (m != NULL) { 2266195377Ssam *frm++ = category; 2267195377Ssam *frm++ = action; 2268195377Ssam ADDSHORT(frm, baparamset); 2269195377Ssam ADDSHORT(frm, args[2]); /* reason code */ 2270195377Ssam m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2271195377Ssam return ht_action_output(ni, m); 2272195377Ssam } else { 2273195377Ssam vap->iv_stats.is_tx_nobuf++; 2274195377Ssam ieee80211_free_node(ni); 2275195377Ssam return ENOMEM; 2276195377Ssam } 2277195377Ssam} 2278170530Ssam 2279195377Ssamstatic int 2280195377Ssamht_send_action_ht_txchwidth(struct ieee80211_node *ni, 2281195377Ssam int category, int action, void *arg0) 2282195377Ssam{ 2283195377Ssam struct ieee80211vap *vap = ni->ni_vap; 2284195377Ssam struct ieee80211com *ic = ni->ni_ic; 2285195377Ssam struct mbuf *m; 2286195377Ssam uint8_t *frm; 2287170530Ssam 2288195377Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 2289195377Ssam "send HT txchwidth: width %d", 2290195377Ssam IEEE80211_IS_CHAN_HT40(ni->ni_chan) ? 40 : 20); 2291170530Ssam 2292195377Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 2293195377Ssam "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", __func__, __LINE__, 2294195377Ssam ni, ether_sprintf(ni->ni_macaddr), ieee80211_node_refcnt(ni)+1); 2295195377Ssam ieee80211_ref_node(ni); 2296170530Ssam 2297195377Ssam m = ieee80211_getmgtframe(&frm, 2298195377Ssam ic->ic_headroom + sizeof(struct ieee80211_frame), 2299195377Ssam sizeof(uint16_t) /* action+category */ 2300195377Ssam /* XXX may action payload */ 2301195377Ssam + sizeof(struct ieee80211_action_ba_addbaresponse) 2302195377Ssam ); 2303195377Ssam if (m != NULL) { 2304195377Ssam *frm++ = category; 2305195377Ssam *frm++ = action; 2306195377Ssam *frm++ = IEEE80211_IS_CHAN_HT40(ni->ni_chan) ? 2307195377Ssam IEEE80211_A_HT_TXCHWIDTH_2040 : 2308195377Ssam IEEE80211_A_HT_TXCHWIDTH_20; 2309195377Ssam m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2310195377Ssam return ht_action_output(ni, m); 2311195377Ssam } else { 2312195377Ssam vap->iv_stats.is_tx_nobuf++; 2313195377Ssam ieee80211_free_node(ni); 2314195377Ssam return ENOMEM; 2315170530Ssam } 2316195377Ssam} 2317170530Ssam#undef ADDSHORT 2318170530Ssam 2319170530Ssam/* 2320170530Ssam * Construct the MCS bit mask for inclusion 2321170530Ssam * in an HT information element. 2322170530Ssam */ 2323170530Ssamstatic void 2324170530Ssamieee80211_set_htrates(uint8_t *frm, const struct ieee80211_htrateset *rs) 2325170530Ssam{ 2326170530Ssam int i; 2327170530Ssam 2328170530Ssam for (i = 0; i < rs->rs_nrates; i++) { 2329170530Ssam int r = rs->rs_rates[i] & IEEE80211_RATE_VAL; 2330170530Ssam if (r < IEEE80211_HTRATE_MAXSIZE) { /* XXX? */ 2331170530Ssam /* NB: this assumes a particular implementation */ 2332170530Ssam setbit(frm, r); 2333170530Ssam } 2334170530Ssam } 2335170530Ssam} 2336170530Ssam 2337170530Ssam/* 2338170530Ssam * Add body of an HTCAP information element. 2339170530Ssam */ 2340170530Ssamstatic uint8_t * 2341170530Ssamieee80211_add_htcap_body(uint8_t *frm, struct ieee80211_node *ni) 2342170530Ssam{ 2343170530Ssam#define ADDSHORT(frm, v) do { \ 2344170530Ssam frm[0] = (v) & 0xff; \ 2345170530Ssam frm[1] = (v) >> 8; \ 2346170530Ssam frm += 2; \ 2347170530Ssam} while (0) 2348178354Ssam struct ieee80211vap *vap = ni->ni_vap; 2349205513Srpaulo uint16_t caps, extcaps; 2350173865Ssam int rxmax, density; 2351170530Ssam 2352170530Ssam /* HT capabilities */ 2353178354Ssam caps = vap->iv_htcaps & 0xffff; 2354173273Ssam /* 2355173273Ssam * Note channel width depends on whether we are operating as 2356173273Ssam * a sta or not. When operating as a sta we are generating 2357173273Ssam * a request based on our desired configuration. Otherwise 2358173273Ssam * we are operational and the channel attributes identify 2359173273Ssam * how we've been setup (which might be different if a fixed 2360173273Ssam * channel is specified). 2361173273Ssam */ 2362178354Ssam if (vap->iv_opmode == IEEE80211_M_STA) { 2363173273Ssam /* override 20/40 use based on config */ 2364193655Ssam if (vap->iv_flags_ht & IEEE80211_FHT_USEHT40) 2365173273Ssam caps |= IEEE80211_HTCAP_CHWIDTH40; 2366173273Ssam else 2367173273Ssam caps &= ~IEEE80211_HTCAP_CHWIDTH40; 2368173865Ssam /* use advertised setting (XXX locally constraint) */ 2369173865Ssam rxmax = MS(ni->ni_htparam, IEEE80211_HTCAP_MAXRXAMPDU); 2370173865Ssam density = MS(ni->ni_htparam, IEEE80211_HTCAP_MPDUDENSITY); 2371173273Ssam } else { 2372173273Ssam /* override 20/40 use based on current channel */ 2373178354Ssam if (IEEE80211_IS_CHAN_HT40(ni->ni_chan)) 2374173273Ssam caps |= IEEE80211_HTCAP_CHWIDTH40; 2375173273Ssam else 2376173273Ssam caps &= ~IEEE80211_HTCAP_CHWIDTH40; 2377178354Ssam rxmax = vap->iv_ampdu_rxmax; 2378178354Ssam density = vap->iv_ampdu_density; 2379173273Ssam } 2380170530Ssam /* adjust short GI based on channel and config */ 2381193655Ssam if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI20) == 0) 2382170530Ssam caps &= ~IEEE80211_HTCAP_SHORTGI20; 2383193655Ssam if ((vap->iv_flags_ht & IEEE80211_FHT_SHORTGI40) == 0 || 2384170530Ssam (caps & IEEE80211_HTCAP_CHWIDTH40) == 0) 2385170530Ssam caps &= ~IEEE80211_HTCAP_SHORTGI40; 2386170530Ssam ADDSHORT(frm, caps); 2387170530Ssam 2388170530Ssam /* HT parameters */ 2389173865Ssam *frm = SM(rxmax, IEEE80211_HTCAP_MAXRXAMPDU) 2390173865Ssam | SM(density, IEEE80211_HTCAP_MPDUDENSITY) 2391173273Ssam ; 2392170530Ssam frm++; 2393170530Ssam 2394170530Ssam /* pre-zero remainder of ie */ 2395170530Ssam memset(frm, 0, sizeof(struct ieee80211_ie_htcap) - 2396170530Ssam __offsetof(struct ieee80211_ie_htcap, hc_mcsset)); 2397170530Ssam 2398170530Ssam /* supported MCS set */ 2399173273Ssam /* 2400173273Ssam * XXX it would better to get the rate set from ni_htrates 2401173273Ssam * so we can restrict it but for sta mode ni_htrates isn't 2402173273Ssam * setup when we're called to form an AssocReq frame so for 2403173273Ssam * now we're restricted to the default HT rate set. 2404173273Ssam */ 2405173273Ssam ieee80211_set_htrates(frm, &ieee80211_rateset_11n); 2406170530Ssam 2407205513Srpaulo frm += __offsetof(struct ieee80211_ie_htcap, hc_extcap) - 2408205513Srpaulo __offsetof(struct ieee80211_ie_htcap, hc_mcsset); 2409205513Srpaulo 2410205513Srpaulo /* HT extended capabilities */ 2411205513Srpaulo extcaps = vap->iv_htextcaps & 0xffff; 2412205513Srpaulo 2413205513Srpaulo ADDSHORT(frm, extcaps); 2414205513Srpaulo 2415170530Ssam frm += sizeof(struct ieee80211_ie_htcap) - 2416205513Srpaulo __offsetof(struct ieee80211_ie_htcap, hc_txbf); 2417205513Srpaulo 2418170530Ssam return frm; 2419170530Ssam#undef ADDSHORT 2420170530Ssam} 2421170530Ssam 2422170530Ssam/* 2423170530Ssam * Add 802.11n HT capabilities information element 2424170530Ssam */ 2425170530Ssamuint8_t * 2426170530Ssamieee80211_add_htcap(uint8_t *frm, struct ieee80211_node *ni) 2427170530Ssam{ 2428170530Ssam frm[0] = IEEE80211_ELEMID_HTCAP; 2429170530Ssam frm[1] = sizeof(struct ieee80211_ie_htcap) - 2; 2430170530Ssam return ieee80211_add_htcap_body(frm + 2, ni); 2431170530Ssam} 2432170530Ssam 2433170530Ssam/* 2434170530Ssam * Add Broadcom OUI wrapped standard HTCAP ie; this is 2435170530Ssam * used for compatibility w/ pre-draft implementations. 2436170530Ssam */ 2437170530Ssamuint8_t * 2438170530Ssamieee80211_add_htcap_vendor(uint8_t *frm, struct ieee80211_node *ni) 2439170530Ssam{ 2440170530Ssam frm[0] = IEEE80211_ELEMID_VENDOR; 2441170530Ssam frm[1] = 4 + sizeof(struct ieee80211_ie_htcap) - 2; 2442170530Ssam frm[2] = (BCM_OUI >> 0) & 0xff; 2443170530Ssam frm[3] = (BCM_OUI >> 8) & 0xff; 2444170530Ssam frm[4] = (BCM_OUI >> 16) & 0xff; 2445170530Ssam frm[5] = BCM_OUI_HTCAP; 2446170530Ssam return ieee80211_add_htcap_body(frm + 6, ni); 2447170530Ssam} 2448170530Ssam 2449170530Ssam/* 2450170530Ssam * Construct the MCS bit mask of basic rates 2451170530Ssam * for inclusion in an HT information element. 2452170530Ssam */ 2453170530Ssamstatic void 2454170530Ssamieee80211_set_basic_htrates(uint8_t *frm, const struct ieee80211_htrateset *rs) 2455170530Ssam{ 2456170530Ssam int i; 2457170530Ssam 2458170530Ssam for (i = 0; i < rs->rs_nrates; i++) { 2459170530Ssam int r = rs->rs_rates[i] & IEEE80211_RATE_VAL; 2460170530Ssam if ((rs->rs_rates[i] & IEEE80211_RATE_BASIC) && 2461170530Ssam r < IEEE80211_HTRATE_MAXSIZE) { 2462170530Ssam /* NB: this assumes a particular implementation */ 2463170530Ssam setbit(frm, r); 2464170530Ssam } 2465170530Ssam } 2466170530Ssam} 2467170530Ssam 2468170530Ssam/* 2469172211Ssam * Update the HTINFO ie for a beacon frame. 2470172211Ssam */ 2471172211Ssamvoid 2472178354Ssamieee80211_ht_update_beacon(struct ieee80211vap *vap, 2473172211Ssam struct ieee80211_beacon_offsets *bo) 2474172211Ssam{ 2475172211Ssam#define PROTMODE (IEEE80211_HTINFO_OPMODE|IEEE80211_HTINFO_NONHT_PRESENT) 2476178354Ssam const struct ieee80211_channel *bsschan = vap->iv_bss->ni_chan; 2477178354Ssam struct ieee80211com *ic = vap->iv_ic; 2478172211Ssam struct ieee80211_ie_htinfo *ht = 2479172211Ssam (struct ieee80211_ie_htinfo *) bo->bo_htinfo; 2480172211Ssam 2481172211Ssam /* XXX only update on channel change */ 2482178354Ssam ht->hi_ctrlchannel = ieee80211_chan2ieee(ic, bsschan); 2483193655Ssam if (vap->iv_flags_ht & IEEE80211_FHT_RIFS) 2484183256Ssam ht->hi_byte1 = IEEE80211_HTINFO_RIFSMODE_PERM; 2485183256Ssam else 2486183256Ssam ht->hi_byte1 = IEEE80211_HTINFO_RIFSMODE_PROH; 2487178354Ssam if (IEEE80211_IS_CHAN_HT40U(bsschan)) 2488172211Ssam ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_ABOVE; 2489178354Ssam else if (IEEE80211_IS_CHAN_HT40D(bsschan)) 2490172211Ssam ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_BELOW; 2491172211Ssam else 2492172211Ssam ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_NONE; 2493178354Ssam if (IEEE80211_IS_CHAN_HT40(bsschan)) 2494172211Ssam ht->hi_byte1 |= IEEE80211_HTINFO_TXWIDTH_2040; 2495172211Ssam 2496172211Ssam /* protection mode */ 2497172211Ssam ht->hi_byte2 = (ht->hi_byte2 &~ PROTMODE) | ic->ic_curhtprotmode; 2498172211Ssam 2499172211Ssam /* XXX propagate to vendor ie's */ 2500172211Ssam#undef PROTMODE 2501172211Ssam} 2502172211Ssam 2503172211Ssam/* 2504170530Ssam * Add body of an HTINFO information element. 2505173273Ssam * 2506173273Ssam * NB: We don't use struct ieee80211_ie_htinfo because we can 2507173273Ssam * be called to fillin both a standard ie and a compat ie that 2508173273Ssam * has a vendor OUI at the front. 2509170530Ssam */ 2510170530Ssamstatic uint8_t * 2511170530Ssamieee80211_add_htinfo_body(uint8_t *frm, struct ieee80211_node *ni) 2512170530Ssam{ 2513183256Ssam struct ieee80211vap *vap = ni->ni_vap; 2514170530Ssam struct ieee80211com *ic = ni->ni_ic; 2515170530Ssam 2516170530Ssam /* pre-zero remainder of ie */ 2517170530Ssam memset(frm, 0, sizeof(struct ieee80211_ie_htinfo) - 2); 2518170530Ssam 2519170530Ssam /* primary/control channel center */ 2520178354Ssam *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan); 2521170530Ssam 2522193655Ssam if (vap->iv_flags_ht & IEEE80211_FHT_RIFS) 2523183256Ssam frm[0] = IEEE80211_HTINFO_RIFSMODE_PERM; 2524183256Ssam else 2525183256Ssam frm[0] = IEEE80211_HTINFO_RIFSMODE_PROH; 2526178354Ssam if (IEEE80211_IS_CHAN_HT40U(ni->ni_chan)) 2527170530Ssam frm[0] |= IEEE80211_HTINFO_2NDCHAN_ABOVE; 2528178354Ssam else if (IEEE80211_IS_CHAN_HT40D(ni->ni_chan)) 2529170530Ssam frm[0] |= IEEE80211_HTINFO_2NDCHAN_BELOW; 2530170530Ssam else 2531170530Ssam frm[0] |= IEEE80211_HTINFO_2NDCHAN_NONE; 2532178354Ssam if (IEEE80211_IS_CHAN_HT40(ni->ni_chan)) 2533170530Ssam frm[0] |= IEEE80211_HTINFO_TXWIDTH_2040; 2534170530Ssam 2535172211Ssam frm[1] = ic->ic_curhtprotmode; 2536170530Ssam 2537170530Ssam frm += 5; 2538170530Ssam 2539170530Ssam /* basic MCS set */ 2540170530Ssam ieee80211_set_basic_htrates(frm, &ni->ni_htrates); 2541170530Ssam frm += sizeof(struct ieee80211_ie_htinfo) - 2542170530Ssam __offsetof(struct ieee80211_ie_htinfo, hi_basicmcsset); 2543170530Ssam return frm; 2544170530Ssam} 2545170530Ssam 2546170530Ssam/* 2547170530Ssam * Add 802.11n HT information information element. 2548170530Ssam */ 2549170530Ssamuint8_t * 2550170530Ssamieee80211_add_htinfo(uint8_t *frm, struct ieee80211_node *ni) 2551170530Ssam{ 2552170530Ssam frm[0] = IEEE80211_ELEMID_HTINFO; 2553170530Ssam frm[1] = sizeof(struct ieee80211_ie_htinfo) - 2; 2554170530Ssam return ieee80211_add_htinfo_body(frm + 2, ni); 2555170530Ssam} 2556170530Ssam 2557170530Ssam/* 2558170530Ssam * Add Broadcom OUI wrapped standard HTINFO ie; this is 2559170530Ssam * used for compatibility w/ pre-draft implementations. 2560170530Ssam */ 2561170530Ssamuint8_t * 2562170530Ssamieee80211_add_htinfo_vendor(uint8_t *frm, struct ieee80211_node *ni) 2563170530Ssam{ 2564170530Ssam frm[0] = IEEE80211_ELEMID_VENDOR; 2565170530Ssam frm[1] = 4 + sizeof(struct ieee80211_ie_htinfo) - 2; 2566170530Ssam frm[2] = (BCM_OUI >> 0) & 0xff; 2567170530Ssam frm[3] = (BCM_OUI >> 8) & 0xff; 2568170530Ssam frm[4] = (BCM_OUI >> 16) & 0xff; 2569170530Ssam frm[5] = BCM_OUI_HTINFO; 2570170530Ssam return ieee80211_add_htinfo_body(frm + 6, ni); 2571170530Ssam} 2572