ieee80211_ht.c revision 182830
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 182830 2008-09-06 17:39:31Z sam $"); 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> 50178354Ssam#include <net80211/ieee80211_input.h> 51170530Ssam 52170530Ssam/* define here, used throughout file */ 53170530Ssam#define MS(_v, _f) (((_v) & _f) >> _f##_S) 54170530Ssam#define SM(_v, _f) (((_v) << _f##_S) & _f) 55170530Ssam 56178354Ssamconst struct ieee80211_mcs_rates ieee80211_htrates[16] = { 57178354Ssam { 13, 14, 27, 30 }, /* MCS 0 */ 58178354Ssam { 26, 29, 54, 60 }, /* MCS 1 */ 59178354Ssam { 39, 43, 81, 90 }, /* MCS 2 */ 60178354Ssam { 52, 58, 108, 120 }, /* MCS 3 */ 61178354Ssam { 78, 87, 162, 180 }, /* MCS 4 */ 62178354Ssam { 104, 116, 216, 240 }, /* MCS 5 */ 63178354Ssam { 117, 130, 243, 270 }, /* MCS 6 */ 64178354Ssam { 130, 144, 270, 300 }, /* MCS 7 */ 65178354Ssam { 26, 29, 54, 60 }, /* MCS 8 */ 66178354Ssam { 52, 58, 108, 120 }, /* MCS 9 */ 67178354Ssam { 78, 87, 162, 180 }, /* MCS 10 */ 68178354Ssam { 104, 116, 216, 240 }, /* MCS 11 */ 69178354Ssam { 156, 173, 324, 360 }, /* MCS 12 */ 70178354Ssam { 208, 231, 432, 480 }, /* MCS 13 */ 71178354Ssam { 234, 260, 486, 540 }, /* MCS 14 */ 72178354Ssam { 260, 289, 540, 600 } /* MCS 15 */ 73170530Ssam}; 74170530Ssam 75170530Ssamstatic const struct ieee80211_htrateset ieee80211_rateset_11n = 76170530Ssam { 16, { 77170530Ssam 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 78170530Ssam 10, 11, 12, 13, 14, 15 } 79170530Ssam }; 80170530Ssam 81173273Ssam#ifdef IEEE80211_AMPDU_AGE 82173273Ssam/* XXX public for sysctl hookup */ 83173273Ssamint ieee80211_ampdu_age = -1; /* threshold for ampdu reorder q (ms) */ 84173273Ssam#endif 85173273Ssamint ieee80211_recv_bar_ena = 1; 86178354Ssamint ieee80211_addba_timeout = -1; /* timeout waiting for ADDBA response */ 87178354Ssamint ieee80211_addba_backoff = -1; /* backoff after max ADDBA requests */ 88178354Ssamint ieee80211_addba_maxtries = 3; /* max ADDBA requests before backoff */ 89173273Ssam 90178354Ssam/* 91178354Ssam * Setup HT parameters that depends on the clock frequency. 92178354Ssam */ 93178354Ssamstatic void 94178354Ssamieee80211_ht_setup(void) 95178354Ssam{ 96178354Ssam#ifdef IEEE80211_AMPDU_AGE 97178354Ssam ieee80211_ampdu_age = msecs_to_ticks(500); 98178354Ssam#endif 99178354Ssam ieee80211_addba_timeout = msecs_to_ticks(250); 100178354Ssam ieee80211_addba_backoff = msecs_to_ticks(10*1000); 101178354Ssam} 102178354SsamSYSINIT(wlan_ht, SI_SUB_DRIVERS, SI_ORDER_FIRST, ieee80211_ht_setup, NULL); 103170530Ssam 104178354Ssamstatic int ieee80211_ampdu_enable(struct ieee80211_node *ni, 105178354Ssam struct ieee80211_tx_ampdu *tap); 106170530Ssamstatic int ieee80211_addba_request(struct ieee80211_node *ni, 107170530Ssam struct ieee80211_tx_ampdu *tap, 108170530Ssam int dialogtoken, int baparamset, int batimeout); 109170530Ssamstatic int ieee80211_addba_response(struct ieee80211_node *ni, 110170530Ssam struct ieee80211_tx_ampdu *tap, 111170530Ssam int code, int baparamset, int batimeout); 112170530Ssamstatic void ieee80211_addba_stop(struct ieee80211_node *ni, 113170530Ssam struct ieee80211_tx_ampdu *tap); 114170530Ssamstatic void ieee80211_aggr_recv_action(struct ieee80211_node *ni, 115170530Ssam const uint8_t *frm, const uint8_t *efrm); 116170530Ssam 117170530Ssamvoid 118170530Ssamieee80211_ht_attach(struct ieee80211com *ic) 119170530Ssam{ 120170530Ssam /* setup default aggregation policy */ 121170530Ssam ic->ic_recv_action = ieee80211_aggr_recv_action; 122170530Ssam ic->ic_send_action = ieee80211_send_action; 123178354Ssam ic->ic_ampdu_enable = ieee80211_ampdu_enable; 124170530Ssam ic->ic_addba_request = ieee80211_addba_request; 125170530Ssam ic->ic_addba_response = ieee80211_addba_response; 126170530Ssam ic->ic_addba_stop = ieee80211_addba_stop; 127170530Ssam 128173273Ssam ic->ic_htprotmode = IEEE80211_PROT_RTSCTS; 129173273Ssam ic->ic_curhtprotmode = IEEE80211_HTINFO_OPMODE_PURE; 130178354Ssam} 131173273Ssam 132178354Ssamvoid 133178354Ssamieee80211_ht_detach(struct ieee80211com *ic) 134178354Ssam{ 135178354Ssam} 136173273Ssam 137178354Ssamvoid 138178354Ssamieee80211_ht_vattach(struct ieee80211vap *vap) 139178354Ssam{ 140178354Ssam 141178354Ssam /* driver can override defaults */ 142178354Ssam vap->iv_ampdu_rxmax = IEEE80211_HTCAP_MAXRXAMPDU_8K; 143178354Ssam vap->iv_ampdu_density = IEEE80211_HTCAP_MPDUDENSITY_NA; 144178354Ssam vap->iv_ampdu_limit = vap->iv_ampdu_rxmax; 145178354Ssam vap->iv_amsdu_limit = vap->iv_htcaps & IEEE80211_HTCAP_MAXAMSDU; 146178354Ssam /* tx aggregation traffic thresholds */ 147178354Ssam vap->iv_ampdu_mintraffic[WME_AC_BK] = 128; 148178354Ssam vap->iv_ampdu_mintraffic[WME_AC_BE] = 64; 149178354Ssam vap->iv_ampdu_mintraffic[WME_AC_VO] = 32; 150178354Ssam vap->iv_ampdu_mintraffic[WME_AC_VI] = 32; 151178354Ssam 152178354Ssam if (vap->iv_htcaps & IEEE80211_HTC_HT) { 153170530Ssam /* 154173273Ssam * Device is HT capable; enable all HT-related 155173273Ssam * facilities by default. 156170530Ssam * XXX these choices may be too aggressive. 157170530Ssam */ 158178354Ssam vap->iv_flags_ext |= IEEE80211_FEXT_HT 159178354Ssam | IEEE80211_FEXT_HTCOMPAT 160178354Ssam ; 161178354Ssam if (vap->iv_htcaps & IEEE80211_HTCAP_SHORTGI20) 162178354Ssam vap->iv_flags_ext |= IEEE80211_FEXT_SHORTGI20; 163173273Ssam /* XXX infer from channel list? */ 164178354Ssam if (vap->iv_htcaps & IEEE80211_HTCAP_CHWIDTH40) { 165178354Ssam vap->iv_flags_ext |= IEEE80211_FEXT_USEHT40; 166178354Ssam if (vap->iv_htcaps & IEEE80211_HTCAP_SHORTGI40) 167178354Ssam vap->iv_flags_ext |= IEEE80211_FEXT_SHORTGI40; 168170530Ssam } 169170530Ssam /* NB: A-MPDU and A-MSDU rx are mandated, these are tx only */ 170178354Ssam vap->iv_flags_ext |= IEEE80211_FEXT_AMPDU_RX; 171178354Ssam if (vap->iv_htcaps & IEEE80211_HTC_AMPDU) 172178354Ssam vap->iv_flags_ext |= IEEE80211_FEXT_AMPDU_TX; 173178354Ssam vap->iv_flags_ext |= IEEE80211_FEXT_AMSDU_RX; 174178354Ssam if (vap->iv_htcaps & IEEE80211_HTC_AMSDU) 175178354Ssam vap->iv_flags_ext |= IEEE80211_FEXT_AMSDU_TX; 176170530Ssam } 177178354Ssam /* NB: disable default legacy WDS, too many issues right now */ 178178354Ssam if (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) 179178354Ssam vap->iv_flags_ext &= ~IEEE80211_FEXT_HT; 180170530Ssam} 181170530Ssam 182170530Ssamvoid 183178354Ssamieee80211_ht_vdetach(struct ieee80211vap *vap) 184170530Ssam{ 185170530Ssam} 186170530Ssam 187170530Ssamstatic void 188170530Ssamht_announce(struct ieee80211com *ic, int mode, 189170530Ssam const struct ieee80211_htrateset *rs) 190170530Ssam{ 191170530Ssam struct ifnet *ifp = ic->ic_ifp; 192170530Ssam int i, rate, mword; 193170530Ssam 194170530Ssam if_printf(ifp, "%s MCS: ", ieee80211_phymode_name[mode]); 195170530Ssam for (i = 0; i < rs->rs_nrates; i++) { 196172226Ssam mword = ieee80211_rate2media(ic, 197172226Ssam rs->rs_rates[i] | IEEE80211_RATE_MCS, mode); 198170530Ssam if (IFM_SUBTYPE(mword) != IFM_IEEE80211_MCS) 199170530Ssam continue; 200178354Ssam rate = ieee80211_htrates[rs->rs_rates[i]].ht40_rate_400ns; 201170530Ssam printf("%s%d%sMbps", (i != 0 ? " " : ""), 202170530Ssam rate / 2, ((rate & 0x1) != 0 ? ".5" : "")); 203170530Ssam } 204170530Ssam printf("\n"); 205170530Ssam} 206170530Ssam 207170530Ssamvoid 208170530Ssamieee80211_ht_announce(struct ieee80211com *ic) 209170530Ssam{ 210170530Ssam if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA)) 211170530Ssam ht_announce(ic, IEEE80211_MODE_11NA, &ieee80211_rateset_11n); 212170530Ssam if (isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) 213170530Ssam ht_announce(ic, IEEE80211_MODE_11NG, &ieee80211_rateset_11n); 214170530Ssam} 215170530Ssam 216170530Ssamconst struct ieee80211_htrateset * 217170530Ssamieee80211_get_suphtrates(struct ieee80211com *ic, 218170530Ssam const struct ieee80211_channel *c) 219170530Ssam{ 220173273Ssam return &ieee80211_rateset_11n; 221170530Ssam} 222170530Ssam 223170530Ssam/* 224170530Ssam * Receive processing. 225170530Ssam */ 226170530Ssam 227170530Ssam/* 228170530Ssam * Decap the encapsulated A-MSDU frames and dispatch all but 229170530Ssam * the last for delivery. The last frame is returned for 230170530Ssam * delivery via the normal path. 231170530Ssam */ 232170530Ssamstruct mbuf * 233170530Ssamieee80211_decap_amsdu(struct ieee80211_node *ni, struct mbuf *m) 234170530Ssam{ 235178354Ssam struct ieee80211vap *vap = ni->ni_vap; 236173462Ssam int framelen; 237170530Ssam struct mbuf *n; 238170530Ssam 239170530Ssam /* discard 802.3 header inserted by ieee80211_decap */ 240170530Ssam m_adj(m, sizeof(struct ether_header)); 241170530Ssam 242178354Ssam vap->iv_stats.is_amsdu_decap++; 243170530Ssam 244170530Ssam for (;;) { 245170530Ssam /* 246170530Ssam * Decap the first frame, bust it apart from the 247170530Ssam * remainder and deliver. We leave the last frame 248170530Ssam * delivery to the caller (for consistency with other 249170530Ssam * code paths, could also do it here). 250170530Ssam */ 251170530Ssam m = ieee80211_decap1(m, &framelen); 252170530Ssam if (m == NULL) { 253178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 254173462Ssam ni->ni_macaddr, "a-msdu", "%s", "decap failed"); 255178354Ssam vap->iv_stats.is_amsdu_tooshort++; 256170530Ssam return NULL; 257170530Ssam } 258173462Ssam if (m->m_pkthdr.len == framelen) 259170530Ssam break; 260170530Ssam n = m_split(m, framelen, M_NOWAIT); 261170530Ssam if (n == NULL) { 262178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 263170530Ssam ni->ni_macaddr, "a-msdu", 264170530Ssam "%s", "unable to split encapsulated frames"); 265178354Ssam vap->iv_stats.is_amsdu_split++; 266170530Ssam m_freem(m); /* NB: must reclaim */ 267170530Ssam return NULL; 268170530Ssam } 269178354Ssam vap->iv_deliver_data(vap, ni, m); 270170530Ssam 271170530Ssam /* 272170530Ssam * Remove frame contents; each intermediate frame 273170530Ssam * is required to be aligned to a 4-byte boundary. 274170530Ssam */ 275170530Ssam m = n; 276170530Ssam m_adj(m, roundup2(framelen, 4) - framelen); /* padding */ 277170530Ssam } 278170530Ssam return m; /* last delivered by caller */ 279170530Ssam} 280170530Ssam 281170530Ssam/* 282170530Ssam * Purge all frames in the A-MPDU re-order queue. 283170530Ssam */ 284170530Ssamstatic void 285170530Ssamampdu_rx_purge(struct ieee80211_rx_ampdu *rap) 286170530Ssam{ 287170530Ssam struct mbuf *m; 288170530Ssam int i; 289170530Ssam 290170530Ssam for (i = 0; i < rap->rxa_wnd; i++) { 291170530Ssam m = rap->rxa_m[i]; 292170530Ssam if (m != NULL) { 293170530Ssam rap->rxa_m[i] = NULL; 294170530Ssam rap->rxa_qbytes -= m->m_pkthdr.len; 295170530Ssam m_freem(m); 296170530Ssam if (--rap->rxa_qframes == 0) 297170530Ssam break; 298170530Ssam } 299170530Ssam } 300170530Ssam KASSERT(rap->rxa_qbytes == 0 && rap->rxa_qframes == 0, 301170530Ssam ("lost %u data, %u frames on ampdu rx q", 302170530Ssam rap->rxa_qbytes, rap->rxa_qframes)); 303170530Ssam} 304170530Ssam 305170530Ssam/* 306178354Ssam * Start A-MPDU rx/re-order processing for the specified TID. 307178354Ssam */ 308178354Ssamstatic void 309178354Ssamampdu_rx_start(struct ieee80211_rx_ampdu *rap, int bufsiz, int start) 310178354Ssam{ 311178354Ssam if (rap->rxa_flags & IEEE80211_AGGR_RUNNING) { 312178354Ssam /* 313178354Ssam * AMPDU previously setup and not terminated with a DELBA, 314178354Ssam * flush the reorder q's in case anything remains. 315178354Ssam */ 316178354Ssam ampdu_rx_purge(rap); 317178354Ssam } 318178354Ssam memset(rap, 0, sizeof(*rap)); 319178354Ssam rap->rxa_wnd = (bufsiz == 0) ? 320178354Ssam IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX); 321178354Ssam rap->rxa_start = start; 322178354Ssam rap->rxa_flags |= IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_XCHGPEND; 323178354Ssam} 324178354Ssam 325178354Ssam/* 326170530Ssam * Stop A-MPDU rx processing for the specified TID. 327170530Ssam */ 328170530Ssamstatic void 329170530Ssamampdu_rx_stop(struct ieee80211_rx_ampdu *rap) 330170530Ssam{ 331170530Ssam ampdu_rx_purge(rap); 332178354Ssam rap->rxa_flags &= ~(IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_XCHGPEND); 333170530Ssam} 334170530Ssam 335170530Ssam/* 336170530Ssam * Dispatch a frame from the A-MPDU reorder queue. The 337170530Ssam * frame is fed back into ieee80211_input marked with an 338170530Ssam * M_AMPDU flag so it doesn't come back to us (it also 339170530Ssam * permits ieee80211_input to optimize re-processing). 340170530Ssam */ 341170530Ssamstatic __inline void 342170530Ssamampdu_dispatch(struct ieee80211_node *ni, struct mbuf *m) 343170530Ssam{ 344170530Ssam m->m_flags |= M_AMPDU; /* bypass normal processing */ 345170530Ssam /* NB: rssi, noise, and rstamp are ignored w/ M_AMPDU set */ 346178354Ssam (void) ieee80211_input(ni, m, 0, 0, 0); 347170530Ssam} 348170530Ssam 349170530Ssam/* 350170530Ssam * Dispatch as many frames as possible from the re-order queue. 351170530Ssam * Frames will always be "at the front"; we process all frames 352170530Ssam * up to the first empty slot in the window. On completion we 353170530Ssam * cleanup state if there are still pending frames in the current 354170530Ssam * BA window. We assume the frame at slot 0 is already handled 355170530Ssam * by the caller; we always start at slot 1. 356170530Ssam */ 357170530Ssamstatic void 358170530Ssamampdu_rx_dispatch(struct ieee80211_rx_ampdu *rap, struct ieee80211_node *ni) 359170530Ssam{ 360178354Ssam struct ieee80211vap *vap = ni->ni_vap; 361170530Ssam struct mbuf *m; 362170530Ssam int i; 363170530Ssam 364170530Ssam /* flush run of frames */ 365170530Ssam for (i = 1; i < rap->rxa_wnd; i++) { 366170530Ssam m = rap->rxa_m[i]; 367170530Ssam if (m == NULL) 368170530Ssam break; 369170530Ssam rap->rxa_m[i] = NULL; 370170530Ssam rap->rxa_qbytes -= m->m_pkthdr.len; 371170530Ssam rap->rxa_qframes--; 372170530Ssam 373170530Ssam ampdu_dispatch(ni, m); 374170530Ssam } 375170530Ssam /* 376170530Ssam * If frames remain, copy the mbuf pointers down so 377170530Ssam * they correspond to the offsets in the new window. 378170530Ssam */ 379170530Ssam if (rap->rxa_qframes != 0) { 380170530Ssam int n = rap->rxa_qframes, j; 381170530Ssam for (j = i+1; j < rap->rxa_wnd; j++) { 382170530Ssam if (rap->rxa_m[j] != NULL) { 383170530Ssam rap->rxa_m[j-i] = rap->rxa_m[j]; 384170530Ssam rap->rxa_m[j] = NULL; 385170530Ssam if (--n == 0) 386170530Ssam break; 387170530Ssam } 388170530Ssam } 389170530Ssam KASSERT(n == 0, ("lost %d frames", n)); 390178354Ssam vap->iv_stats.is_ampdu_rx_copy += rap->rxa_qframes; 391170530Ssam } 392173273Ssam /* 393173273Ssam * Adjust the start of the BA window to 394173273Ssam * reflect the frames just dispatched. 395173273Ssam */ 396173273Ssam rap->rxa_start = IEEE80211_SEQ_ADD(rap->rxa_start, i); 397178354Ssam vap->iv_stats.is_ampdu_rx_oor += i; 398170530Ssam} 399170530Ssam 400173273Ssam#ifdef IEEE80211_AMPDU_AGE 401170530Ssam/* 402173273Ssam * Dispatch all frames in the A-MPDU re-order queue. 403170530Ssam */ 404170530Ssamstatic void 405173273Ssamampdu_rx_flush(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap) 406170530Ssam{ 407178354Ssam struct ieee80211vap *vap = ni->ni_vap; 408170530Ssam struct mbuf *m; 409170530Ssam int i; 410170530Ssam 411173273Ssam for (i = 0; i < rap->rxa_wnd; i++) { 412170530Ssam m = rap->rxa_m[i]; 413170530Ssam if (m == NULL) 414170530Ssam continue; 415170530Ssam rap->rxa_m[i] = NULL; 416170530Ssam rap->rxa_qbytes -= m->m_pkthdr.len; 417173273Ssam rap->rxa_qframes--; 418178354Ssam vap->iv_stats.is_ampdu_rx_oor++; 419173273Ssam 420170530Ssam ampdu_dispatch(ni, m); 421173273Ssam if (rap->rxa_qframes == 0) 422170530Ssam break; 423170530Ssam } 424170530Ssam} 425173273Ssam#endif /* IEEE80211_AMPDU_AGE */ 426170530Ssam 427170530Ssam/* 428173273Ssam * Dispatch all frames in the A-MPDU re-order queue 429173273Ssam * preceding the specified sequence number. This logic 430173273Ssam * handles window moves due to a received MSDU or BAR. 431173273Ssam */ 432173273Ssamstatic void 433173273Ssamampdu_rx_flush_upto(struct ieee80211_node *ni, 434173273Ssam struct ieee80211_rx_ampdu *rap, ieee80211_seq winstart) 435173273Ssam{ 436178354Ssam struct ieee80211vap *vap = ni->ni_vap; 437173273Ssam struct mbuf *m; 438173273Ssam ieee80211_seq seqno; 439173273Ssam int i; 440173273Ssam 441173273Ssam /* 442173273Ssam * Flush any complete MSDU's with a sequence number lower 443173273Ssam * than winstart. Gaps may exist. Note that we may actually 444173273Ssam * dispatch frames past winstart if a run continues; this is 445173273Ssam * an optimization that avoids having to do a separate pass 446173273Ssam * to dispatch frames after moving the BA window start. 447173273Ssam */ 448173273Ssam seqno = rap->rxa_start; 449173273Ssam for (i = 0; i < rap->rxa_wnd; i++) { 450173273Ssam m = rap->rxa_m[i]; 451173273Ssam if (m != NULL) { 452173273Ssam rap->rxa_m[i] = NULL; 453173273Ssam rap->rxa_qbytes -= m->m_pkthdr.len; 454173273Ssam rap->rxa_qframes--; 455178354Ssam vap->iv_stats.is_ampdu_rx_oor++; 456173273Ssam 457173273Ssam ampdu_dispatch(ni, m); 458173273Ssam } else { 459173273Ssam if (!IEEE80211_SEQ_BA_BEFORE(seqno, winstart)) 460173273Ssam break; 461173273Ssam } 462173273Ssam seqno = IEEE80211_SEQ_INC(seqno); 463173273Ssam } 464173273Ssam /* 465173273Ssam * If frames remain, copy the mbuf pointers down so 466173273Ssam * they correspond to the offsets in the new window. 467173273Ssam */ 468173273Ssam if (rap->rxa_qframes != 0) { 469173273Ssam int n = rap->rxa_qframes, j; 470178354Ssam 471178354Ssam /* NB: this loop assumes i > 0 and/or rxa_m[0] is NULL */ 472178354Ssam KASSERT(rap->rxa_m[0] == NULL, 473178354Ssam ("%s: BA window slot 0 occupied", __func__)); 474173273Ssam for (j = i+1; j < rap->rxa_wnd; j++) { 475173273Ssam if (rap->rxa_m[j] != NULL) { 476173273Ssam rap->rxa_m[j-i] = rap->rxa_m[j]; 477173273Ssam rap->rxa_m[j] = NULL; 478173273Ssam if (--n == 0) 479173273Ssam break; 480173273Ssam } 481173273Ssam } 482173273Ssam KASSERT(n == 0, ("%s: lost %d frames, qframes %d off %d " 483173273Ssam "BA win <%d:%d> winstart %d", 484173273Ssam __func__, n, rap->rxa_qframes, i, rap->rxa_start, 485173273Ssam IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 486173273Ssam winstart)); 487178354Ssam vap->iv_stats.is_ampdu_rx_copy += rap->rxa_qframes; 488173273Ssam } 489173273Ssam /* 490173273Ssam * Move the start of the BA window; we use the 491173273Ssam * sequence number of the last MSDU that was 492173273Ssam * passed up the stack+1 or winstart if stopped on 493173273Ssam * a gap in the reorder buffer. 494173273Ssam */ 495173273Ssam rap->rxa_start = seqno; 496173273Ssam} 497173273Ssam 498173273Ssam/* 499170530Ssam * Process a received QoS data frame for an HT station. Handle 500170530Ssam * A-MPDU reordering: if this frame is received out of order 501170530Ssam * and falls within the BA window hold onto it. Otherwise if 502173273Ssam * this frame completes a run, flush any pending frames. We 503170530Ssam * return 1 if the frame is consumed. A 0 is returned if 504170530Ssam * the frame should be processed normally by the caller. 505170530Ssam */ 506170530Ssamint 507170530Ssamieee80211_ampdu_reorder(struct ieee80211_node *ni, struct mbuf *m) 508170530Ssam{ 509170530Ssam#define IEEE80211_FC0_QOSDATA \ 510170530Ssam (IEEE80211_FC0_TYPE_DATA|IEEE80211_FC0_SUBTYPE_QOS|IEEE80211_FC0_VERSION_0) 511173273Ssam#define PROCESS 0 /* caller should process frame */ 512173273Ssam#define CONSUMED 1 /* frame consumed, caller does nothing */ 513178354Ssam struct ieee80211vap *vap = ni->ni_vap; 514170530Ssam struct ieee80211_qosframe *wh; 515170530Ssam struct ieee80211_rx_ampdu *rap; 516170530Ssam ieee80211_seq rxseq; 517170530Ssam uint8_t tid; 518170530Ssam int off; 519170530Ssam 520170530Ssam KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT sta")); 521170530Ssam 522170530Ssam /* NB: m_len known to be sufficient */ 523170530Ssam wh = mtod(m, struct ieee80211_qosframe *); 524170530Ssam KASSERT(wh->i_fc[0] == IEEE80211_FC0_QOSDATA, ("not QoS data")); 525170530Ssam 526173273Ssam if ((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS) 527173273Ssam tid = ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0]; 528173273Ssam else 529173273Ssam tid = wh->i_qos[0]; 530173273Ssam tid &= IEEE80211_QOS_TID; 531170530Ssam rap = &ni->ni_rx_ampdu[tid]; 532170530Ssam if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) { 533170530Ssam /* 534170530Ssam * No ADDBA request yet, don't touch. 535170530Ssam */ 536173273Ssam return PROCESS; 537170530Ssam } 538182827Ssam rxseq = le16toh(*(uint16_t *)wh->i_seq); 539182827Ssam if ((rxseq & IEEE80211_SEQ_FRAG_MASK) != 0) { 540182827Ssam /* 541182827Ssam * Fragments are not allowed; toss. 542182827Ssam */ 543182827Ssam IEEE80211_DISCARD_MAC(vap, 544182827Ssam IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr, 545182827Ssam "A-MPDU", "fragment, rxseq 0x%x tid %u%s", rxseq, tid, 546182827Ssam wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : ""); 547182827Ssam vap->iv_stats.is_ampdu_rx_drop++; 548182827Ssam IEEE80211_NODE_STAT(ni, rx_drop); 549182827Ssam m_freem(m); 550182827Ssam return CONSUMED; 551182827Ssam } 552182827Ssam rxseq >>= IEEE80211_SEQ_SEQ_SHIFT; 553173273Ssam rap->rxa_nframes++; 554173273Ssamagain: 555170530Ssam if (rxseq == rap->rxa_start) { 556170530Ssam /* 557170530Ssam * First frame in window. 558170530Ssam */ 559170530Ssam if (rap->rxa_qframes != 0) { 560170530Ssam /* 561170530Ssam * Dispatch as many packets as we can. 562170530Ssam */ 563170530Ssam KASSERT(rap->rxa_m[0] == NULL, ("unexpected dup")); 564170530Ssam ampdu_dispatch(ni, m); 565170530Ssam ampdu_rx_dispatch(rap, ni); 566173273Ssam return CONSUMED; 567170530Ssam } else { 568170530Ssam /* 569170530Ssam * In order; advance window and notify 570170530Ssam * caller to dispatch directly. 571170530Ssam */ 572170530Ssam rap->rxa_start = IEEE80211_SEQ_INC(rxseq); 573173273Ssam return PROCESS; 574170530Ssam } 575170530Ssam } 576170530Ssam /* 577173273Ssam * Frame is out of order; store if in the BA window. 578170530Ssam */ 579170530Ssam /* calculate offset in BA window */ 580170530Ssam off = IEEE80211_SEQ_SUB(rxseq, rap->rxa_start); 581173273Ssam if (off < rap->rxa_wnd) { 582170530Ssam /* 583173273Ssam * Common case (hopefully): in the BA window. 584173273Ssam * Sec 9.10.7.6 a) (D2.04 p.118 line 47) 585173273Ssam */ 586173273Ssam#ifdef IEEE80211_AMPDU_AGE 587173273Ssam /* 588173273Ssam * Check for frames sitting too long in the reorder queue. 589173273Ssam * This should only ever happen if frames are not delivered 590173273Ssam * without the sender otherwise notifying us (e.g. with a 591173273Ssam * BAR to move the window). Typically this happens because 592173273Ssam * of vendor bugs that cause the sequence number to jump. 593173273Ssam * When this happens we get a gap in the reorder queue that 594173273Ssam * leaves frame sitting on the queue until they get pushed 595173273Ssam * out due to window moves. When the vendor does not send 596173273Ssam * BAR this move only happens due to explicit packet sends 597170530Ssam * 598173273Ssam * NB: we only track the time of the oldest frame in the 599173273Ssam * reorder q; this means that if we flush we might push 600173273Ssam * frames that still "new"; if this happens then subsequent 601173273Ssam * frames will result in BA window moves which cost something 602173273Ssam * but is still better than a big throughput dip. 603170530Ssam */ 604173273Ssam if (rap->rxa_qframes != 0) { 605173273Ssam /* XXX honor batimeout? */ 606173273Ssam if (ticks - rap->rxa_age > ieee80211_ampdu_age) { 607173273Ssam /* 608173273Ssam * Too long since we received the first 609173273Ssam * frame; flush the reorder buffer. 610173273Ssam */ 611173273Ssam if (rap->rxa_qframes != 0) { 612178354Ssam vap->iv_stats.is_ampdu_rx_age += 613173273Ssam rap->rxa_qframes; 614173273Ssam ampdu_rx_flush(ni, rap); 615173273Ssam } 616173273Ssam rap->rxa_start = IEEE80211_SEQ_INC(rxseq); 617173273Ssam return PROCESS; 618173273Ssam } 619173273Ssam } else { 620173273Ssam /* 621173273Ssam * First frame, start aging timer. 622173273Ssam */ 623173273Ssam rap->rxa_age = ticks; 624173273Ssam } 625173273Ssam#endif /* IEEE80211_AMPDU_AGE */ 626173273Ssam /* save packet */ 627173273Ssam if (rap->rxa_m[off] == NULL) { 628173273Ssam rap->rxa_m[off] = m; 629173273Ssam rap->rxa_qframes++; 630173273Ssam rap->rxa_qbytes += m->m_pkthdr.len; 631178354Ssam vap->iv_stats.is_ampdu_rx_reorder++; 632173273Ssam } else { 633178354Ssam IEEE80211_DISCARD_MAC(vap, 634173273Ssam IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, 635173273Ssam ni->ni_macaddr, "a-mpdu duplicate", 636173273Ssam "seqno %u tid %u BA win <%u:%u>", 637173273Ssam rxseq, tid, rap->rxa_start, 638173273Ssam IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1)); 639178354Ssam vap->iv_stats.is_rx_dup++; 640173273Ssam IEEE80211_NODE_STAT(ni, rx_dup); 641173273Ssam m_freem(m); 642173273Ssam } 643173273Ssam return CONSUMED; 644173273Ssam } 645173273Ssam if (off < IEEE80211_SEQ_BA_RANGE) { 646173273Ssam /* 647173273Ssam * Outside the BA window, but within range; 648173273Ssam * flush the reorder q and move the window. 649173273Ssam * Sec 9.10.7.6 b) (D2.04 p.118 line 60) 650173273Ssam */ 651178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni, 652173273Ssam "move BA win <%u:%u> (%u frames) rxseq %u tid %u", 653170530Ssam rap->rxa_start, 654173273Ssam IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 655170530Ssam rap->rxa_qframes, rxseq, tid); 656178354Ssam vap->iv_stats.is_ampdu_rx_move++; 657170530Ssam 658173273Ssam /* 659173273Ssam * The spec says to flush frames up to but not including: 660173273Ssam * WinStart_B = rxseq - rap->rxa_wnd + 1 661173273Ssam * Then insert the frame or notify the caller to process 662173273Ssam * it immediately. We can safely do this by just starting 663173273Ssam * over again because we know the frame will now be within 664173273Ssam * the BA window. 665173273Ssam */ 666173273Ssam /* NB: rxa_wnd known to be >0 */ 667173273Ssam ampdu_rx_flush_upto(ni, rap, 668173273Ssam IEEE80211_SEQ_SUB(rxseq, rap->rxa_wnd-1)); 669173273Ssam goto again; 670170530Ssam } else { 671170530Ssam /* 672173273Ssam * Outside the BA window and out of range; toss. 673173273Ssam * Sec 9.10.7.6 c) (D2.04 p.119 line 16) 674170530Ssam */ 675178354Ssam IEEE80211_DISCARD_MAC(vap, 676173273Ssam IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr, 677178354Ssam "MPDU", "BA win <%u:%u> (%u frames) rxseq %u tid %u%s", 678173273Ssam rap->rxa_start, 679173273Ssam IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 680173273Ssam rap->rxa_qframes, rxseq, tid, 681173273Ssam wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : ""); 682178354Ssam vap->iv_stats.is_ampdu_rx_drop++; 683173273Ssam IEEE80211_NODE_STAT(ni, rx_drop); 684170530Ssam m_freem(m); 685173273Ssam return CONSUMED; 686170530Ssam } 687173273Ssam#undef CONSUMED 688173273Ssam#undef PROCESS 689170530Ssam#undef IEEE80211_FC0_QOSDATA 690170530Ssam} 691170530Ssam 692170530Ssam/* 693170530Ssam * Process a BAR ctl frame. Dispatch all frames up to 694170530Ssam * the sequence number of the frame. If this frame is 695173273Ssam * out of range it's discarded. 696170530Ssam */ 697170530Ssamvoid 698170530Ssamieee80211_recv_bar(struct ieee80211_node *ni, struct mbuf *m0) 699170530Ssam{ 700178354Ssam struct ieee80211vap *vap = ni->ni_vap; 701170530Ssam struct ieee80211_frame_bar *wh; 702170530Ssam struct ieee80211_rx_ampdu *rap; 703170530Ssam ieee80211_seq rxseq; 704170530Ssam int tid, off; 705170530Ssam 706173273Ssam if (!ieee80211_recv_bar_ena) { 707173273Ssam#if 0 708178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_11N, 709173273Ssam ni->ni_macaddr, "BAR", "%s", "processing disabled"); 710173273Ssam#endif 711178354Ssam vap->iv_stats.is_ampdu_bar_bad++; 712173273Ssam return; 713173273Ssam } 714170530Ssam wh = mtod(m0, struct ieee80211_frame_bar *); 715170530Ssam /* XXX check basic BAR */ 716170530Ssam tid = MS(le16toh(wh->i_ctl), IEEE80211_BAR_TID); 717170530Ssam rap = &ni->ni_rx_ampdu[tid]; 718170530Ssam if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) { 719170530Ssam /* 720170530Ssam * No ADDBA request yet, don't touch. 721170530Ssam */ 722178354Ssam IEEE80211_DISCARD_MAC(vap, 723170530Ssam IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, 724170530Ssam ni->ni_macaddr, "BAR", "no BA stream, tid %u", tid); 725178354Ssam vap->iv_stats.is_ampdu_bar_bad++; 726170530Ssam return; 727170530Ssam } 728178354Ssam vap->iv_stats.is_ampdu_bar_rx++; 729170530Ssam rxseq = le16toh(wh->i_seq) >> IEEE80211_SEQ_SEQ_SHIFT; 730173273Ssam if (rxseq == rap->rxa_start) 731173273Ssam return; 732170530Ssam /* calculate offset in BA window */ 733170530Ssam off = IEEE80211_SEQ_SUB(rxseq, rap->rxa_start); 734173273Ssam if (off < IEEE80211_SEQ_BA_RANGE) { 735170530Ssam /* 736173273Ssam * Flush the reorder q up to rxseq and move the window. 737173273Ssam * Sec 9.10.7.6 a) (D2.04 p.119 line 22) 738170530Ssam */ 739178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni, 740173273Ssam "BAR moves BA win <%u:%u> (%u frames) rxseq %u tid %u", 741170530Ssam rap->rxa_start, 742173273Ssam IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 743173273Ssam rap->rxa_qframes, rxseq, tid); 744178354Ssam vap->iv_stats.is_ampdu_bar_move++; 745173273Ssam 746173273Ssam ampdu_rx_flush_upto(ni, rap, rxseq); 747173273Ssam if (off >= rap->rxa_wnd) { 748173273Ssam /* 749173273Ssam * BAR specifies a window start to the right of BA 750173273Ssam * window; we must move it explicitly since 751173273Ssam * ampdu_rx_flush_upto will not. 752173273Ssam */ 753173273Ssam rap->rxa_start = rxseq; 754170530Ssam } 755173273Ssam } else { 756170530Ssam /* 757173273Ssam * Out of range; toss. 758173273Ssam * Sec 9.10.7.6 b) (D2.04 p.119 line 41) 759170530Ssam */ 760178354Ssam IEEE80211_DISCARD_MAC(vap, 761173273Ssam IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr, 762173273Ssam "BAR", "BA win <%u:%u> (%u frames) rxseq %u tid %u%s", 763173273Ssam rap->rxa_start, 764173273Ssam IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 765173273Ssam rap->rxa_qframes, rxseq, tid, 766173273Ssam wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : ""); 767178354Ssam vap->iv_stats.is_ampdu_bar_oow++; 768173273Ssam IEEE80211_NODE_STAT(ni, rx_drop); 769170530Ssam } 770170530Ssam} 771170530Ssam 772170530Ssam/* 773170530Ssam * Setup HT-specific state in a node. Called only 774170530Ssam * when HT use is negotiated so we don't do extra 775170530Ssam * work for temporary and/or legacy sta's. 776170530Ssam */ 777170530Ssamvoid 778170530Ssamieee80211_ht_node_init(struct ieee80211_node *ni, const uint8_t *htcap) 779170530Ssam{ 780170530Ssam struct ieee80211_tx_ampdu *tap; 781170530Ssam int ac; 782170530Ssam 783173273Ssam if (ni->ni_flags & IEEE80211_NODE_HT) { 784173273Ssam /* 785173273Ssam * Clean AMPDU state on re-associate. This handles the case 786173273Ssam * where a station leaves w/o notifying us and then returns 787173273Ssam * before node is reaped for inactivity. 788173273Ssam */ 789173273Ssam ieee80211_ht_node_cleanup(ni); 790173273Ssam } 791170530Ssam ieee80211_parse_htcap(ni, htcap); 792170530Ssam for (ac = 0; ac < WME_NUM_AC; ac++) { 793170530Ssam tap = &ni->ni_tx_ampdu[ac]; 794170530Ssam tap->txa_ac = ac; 795173273Ssam /* NB: further initialization deferred */ 796170530Ssam } 797173273Ssam ni->ni_flags |= IEEE80211_NODE_HT | IEEE80211_NODE_AMPDU; 798170530Ssam} 799170530Ssam 800170530Ssam/* 801170530Ssam * Cleanup HT-specific state in a node. Called only 802170530Ssam * when HT use has been marked. 803170530Ssam */ 804170530Ssamvoid 805170530Ssamieee80211_ht_node_cleanup(struct ieee80211_node *ni) 806170530Ssam{ 807170530Ssam struct ieee80211com *ic = ni->ni_ic; 808170530Ssam int i; 809170530Ssam 810170530Ssam KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT node")); 811170530Ssam 812170530Ssam /* XXX optimize this */ 813170530Ssam for (i = 0; i < WME_NUM_AC; i++) { 814170530Ssam struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[i]; 815173273Ssam if (tap->txa_flags & IEEE80211_AGGR_SETUP) { 816173273Ssam /* 817173273Ssam * Stop BA stream if setup so driver has a chance 818173273Ssam * to reclaim any resources it might have allocated. 819173273Ssam */ 820170530Ssam ic->ic_addba_stop(ni, &ni->ni_tx_ampdu[i]); 821178354Ssam tap->txa_lastsample = 0; 822178354Ssam tap->txa_avgpps = 0; 823173273Ssam /* NB: clearing NAK means we may re-send ADDBA */ 824173273Ssam tap->txa_flags &= 825173273Ssam ~(IEEE80211_AGGR_SETUP | IEEE80211_AGGR_NAK); 826173273Ssam } 827170530Ssam } 828170530Ssam for (i = 0; i < WME_NUM_TID; i++) 829170530Ssam ampdu_rx_stop(&ni->ni_rx_ampdu[i]); 830170530Ssam 831170530Ssam ni->ni_htcap = 0; 832182828Ssam ni->ni_flags &= ~IEEE80211_NODE_HT_ALL; 833170530Ssam} 834170530Ssam 835178354Ssam/* 836178354Ssam * Age out HT resources for a station. 837178354Ssam */ 838178354Ssamvoid 839178354Ssamieee80211_ht_node_age(struct ieee80211_node *ni) 840178354Ssam{ 841178354Ssam#ifdef IEEE80211_AMPDU_AGE 842178354Ssam struct ieee80211vap *vap = ni->ni_vap; 843178354Ssam uint8_t tid; 844178354Ssam#endif 845178354Ssam 846178354Ssam KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT sta")); 847178354Ssam 848178354Ssam#ifdef IEEE80211_AMPDU_AGE 849178354Ssam for (tid = 0; tid < WME_NUM_TID; tid++) { 850178354Ssam struct ieee80211_rx_ampdu *rap; 851178354Ssam 852178354Ssam rap = &ni->ni_rx_ampdu[tid]; 853178354Ssam if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) 854178354Ssam continue; 855178354Ssam if (rap->rxa_qframes == 0) 856178354Ssam continue; 857178354Ssam /* 858178354Ssam * Check for frames sitting too long in the reorder queue. 859178354Ssam * See above for more details on what's happening here. 860178354Ssam */ 861178354Ssam /* XXX honor batimeout? */ 862178354Ssam if (ticks - rap->rxa_age > ieee80211_ampdu_age) { 863178354Ssam /* 864178354Ssam * Too long since we received the first 865178354Ssam * frame; flush the reorder buffer. 866178354Ssam */ 867178354Ssam vap->iv_stats.is_ampdu_rx_age += rap->rxa_qframes; 868178354Ssam ampdu_rx_flush(ni, rap); 869178354Ssam } 870178354Ssam } 871178354Ssam#endif /* IEEE80211_AMPDU_AGE */ 872178354Ssam} 873178354Ssam 874173273Ssamstatic struct ieee80211_channel * 875173273Ssamfindhtchan(struct ieee80211com *ic, struct ieee80211_channel *c, int htflags) 876173273Ssam{ 877173273Ssam return ieee80211_find_channel(ic, c->ic_freq, 878173273Ssam (c->ic_flags &~ IEEE80211_CHAN_HT) | htflags); 879173273Ssam} 880173273Ssam 881173273Ssam/* 882173273Ssam * Adjust a channel to be HT/non-HT according to the vap's configuration. 883173273Ssam */ 884173273Ssamstruct ieee80211_channel * 885173273Ssamieee80211_ht_adjust_channel(struct ieee80211com *ic, 886173273Ssam struct ieee80211_channel *chan, int flags) 887173273Ssam{ 888173273Ssam struct ieee80211_channel *c; 889173273Ssam 890173273Ssam if (flags & IEEE80211_FEXT_HT) { 891173273Ssam /* promote to HT if possible */ 892173273Ssam if (flags & IEEE80211_FEXT_USEHT40) { 893173273Ssam if (!IEEE80211_IS_CHAN_HT40(chan)) { 894173273Ssam /* NB: arbitrarily pick ht40+ over ht40- */ 895173273Ssam c = findhtchan(ic, chan, IEEE80211_CHAN_HT40U); 896173273Ssam if (c == NULL) 897173273Ssam c = findhtchan(ic, chan, 898173273Ssam IEEE80211_CHAN_HT40D); 899173273Ssam if (c == NULL) 900173273Ssam c = findhtchan(ic, chan, 901173273Ssam IEEE80211_CHAN_HT20); 902173273Ssam if (c != NULL) 903173273Ssam chan = c; 904173273Ssam } 905173273Ssam } else if (!IEEE80211_IS_CHAN_HT20(chan)) { 906173273Ssam c = findhtchan(ic, chan, IEEE80211_CHAN_HT20); 907173273Ssam if (c != NULL) 908173273Ssam chan = c; 909173273Ssam } 910173273Ssam } else if (IEEE80211_IS_CHAN_HT(chan)) { 911173273Ssam /* demote to legacy, HT use is disabled */ 912173273Ssam c = ieee80211_find_channel(ic, chan->ic_freq, 913173273Ssam chan->ic_flags &~ IEEE80211_CHAN_HT); 914173273Ssam if (c != NULL) 915173273Ssam chan = c; 916173273Ssam } 917173273Ssam return chan; 918173273Ssam} 919173273Ssam 920173273Ssam/* 921173273Ssam * Setup HT-specific state for a legacy WDS peer. 922173273Ssam */ 923173273Ssamvoid 924173273Ssamieee80211_ht_wds_init(struct ieee80211_node *ni) 925173273Ssam{ 926178354Ssam struct ieee80211vap *vap = ni->ni_vap; 927173273Ssam struct ieee80211_tx_ampdu *tap; 928173273Ssam int ac; 929173273Ssam 930178354Ssam KASSERT(vap->iv_flags_ext & IEEE80211_FEXT_HT, ("no HT requested")); 931173273Ssam 932173273Ssam /* XXX check scan cache in case peer has an ap and we have info */ 933173273Ssam /* 934173273Ssam * If setup with a legacy channel; locate an HT channel. 935173273Ssam * Otherwise if the inherited channel (from a companion 936173273Ssam * AP) is suitable use it so we use the same location 937173273Ssam * for the extension channel). 938173273Ssam */ 939178354Ssam ni->ni_chan = ieee80211_ht_adjust_channel(ni->ni_ic, 940178354Ssam ni->ni_chan, ieee80211_htchanflags(ni->ni_chan)); 941173273Ssam 942173273Ssam ni->ni_htcap = 0; 943178354Ssam if (vap->iv_flags_ext & IEEE80211_FEXT_SHORTGI20) 944173273Ssam ni->ni_htcap |= IEEE80211_HTCAP_SHORTGI20; 945173273Ssam if (IEEE80211_IS_CHAN_HT40(ni->ni_chan)) { 946173273Ssam ni->ni_htcap |= IEEE80211_HTCAP_CHWIDTH40; 947173273Ssam ni->ni_chw = 40; 948173273Ssam if (IEEE80211_IS_CHAN_HT40U(ni->ni_chan)) 949173273Ssam ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_ABOVE; 950173273Ssam else if (IEEE80211_IS_CHAN_HT40D(ni->ni_chan)) 951173273Ssam ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_BELOW; 952178354Ssam if (vap->iv_flags_ext & IEEE80211_FEXT_SHORTGI40) 953173273Ssam ni->ni_htcap |= IEEE80211_HTCAP_SHORTGI40; 954173273Ssam } else { 955173273Ssam ni->ni_chw = 20; 956173273Ssam ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_NONE; 957173273Ssam } 958173273Ssam ni->ni_htctlchan = ni->ni_chan->ic_ieee; 959173273Ssam 960173273Ssam ni->ni_htopmode = 0; /* XXX need protection state */ 961173273Ssam ni->ni_htstbc = 0; /* XXX need info */ 962173273Ssam 963173273Ssam for (ac = 0; ac < WME_NUM_AC; ac++) { 964173273Ssam tap = &ni->ni_tx_ampdu[ac]; 965173273Ssam tap->txa_ac = ac; 966173273Ssam } 967173273Ssam /* NB: AMPDU tx/rx governed by IEEE80211_FEXT_AMPDU_{TX,RX} */ 968173273Ssam ni->ni_flags |= IEEE80211_NODE_HT | IEEE80211_NODE_AMPDU; 969173273Ssam} 970173273Ssam 971173273Ssam/* 972173273Ssam * Notify hostap vaps of a change in the HTINFO ie. 973173273Ssam */ 974173273Ssamstatic void 975173273Ssamhtinfo_notify(struct ieee80211com *ic) 976173273Ssam{ 977178354Ssam struct ieee80211vap *vap; 978178354Ssam int first = 1; 979178354Ssam 980178354Ssam IEEE80211_LOCK_ASSERT(ic); 981178354Ssam 982178354Ssam TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 983178354Ssam if (vap->iv_opmode != IEEE80211_M_HOSTAP) 984178354Ssam continue; 985178354Ssam if (first) { 986178354Ssam IEEE80211_NOTE(vap, 987178354Ssam IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, 988178354Ssam vap->iv_bss, 989178354Ssam "HT bss occupancy change: %d sta, %d ht, " 990178354Ssam "%d ht40%s, HT protmode now 0x%x" 991178354Ssam , ic->ic_sta_assoc 992178354Ssam , ic->ic_ht_sta_assoc 993178354Ssam , ic->ic_ht40_sta_assoc 994178354Ssam , (ic->ic_flags_ext & IEEE80211_FEXT_NONHT_PR) ? 995178354Ssam ", non-HT sta present" : "" 996178354Ssam , ic->ic_curhtprotmode); 997178354Ssam first = 0; 998178354Ssam } 999178354Ssam ieee80211_beacon_notify(vap, IEEE80211_BEACON_HTINFO); 1000178354Ssam } 1001173273Ssam} 1002173273Ssam 1003173273Ssam/* 1004173273Ssam * Calculate HT protection mode from current 1005173273Ssam * state and handle updates. 1006173273Ssam */ 1007173273Ssamstatic void 1008173273Ssamhtinfo_update(struct ieee80211com *ic) 1009173273Ssam{ 1010173273Ssam uint8_t protmode; 1011173273Ssam 1012178354Ssam if (ic->ic_sta_assoc != ic->ic_ht_sta_assoc) { 1013178354Ssam protmode = IEEE80211_HTINFO_OPMODE_MIXED 1014178354Ssam | IEEE80211_HTINFO_NONHT_PRESENT; 1015178354Ssam } else if (ic->ic_flags_ext & IEEE80211_FEXT_NONHT_PR) { 1016173273Ssam protmode = IEEE80211_HTINFO_OPMODE_PROTOPT 1017178354Ssam | IEEE80211_HTINFO_NONHT_PRESENT; 1018178354Ssam } else if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && 1019178354Ssam IEEE80211_IS_CHAN_HT40(ic->ic_bsschan) && 1020173273Ssam ic->ic_sta_assoc != ic->ic_ht40_sta_assoc) { 1021173273Ssam protmode = IEEE80211_HTINFO_OPMODE_HT20PR; 1022173273Ssam } else { 1023173273Ssam protmode = IEEE80211_HTINFO_OPMODE_PURE; 1024173273Ssam } 1025173273Ssam if (protmode != ic->ic_curhtprotmode) { 1026173273Ssam ic->ic_curhtprotmode = protmode; 1027173273Ssam htinfo_notify(ic); 1028173273Ssam } 1029173273Ssam} 1030173273Ssam 1031173273Ssam/* 1032173273Ssam * Handle an HT station joining a BSS. 1033173273Ssam */ 1034173273Ssamvoid 1035173273Ssamieee80211_ht_node_join(struct ieee80211_node *ni) 1036173273Ssam{ 1037173273Ssam struct ieee80211com *ic = ni->ni_ic; 1038173273Ssam 1039173273Ssam IEEE80211_LOCK_ASSERT(ic); 1040173273Ssam 1041173273Ssam if (ni->ni_flags & IEEE80211_NODE_HT) { 1042173273Ssam ic->ic_ht_sta_assoc++; 1043173273Ssam if (ni->ni_chw == 40) 1044173273Ssam ic->ic_ht40_sta_assoc++; 1045173273Ssam } 1046173273Ssam htinfo_update(ic); 1047173273Ssam} 1048173273Ssam 1049173273Ssam/* 1050173273Ssam * Handle an HT station leaving a BSS. 1051173273Ssam */ 1052173273Ssamvoid 1053173273Ssamieee80211_ht_node_leave(struct ieee80211_node *ni) 1054173273Ssam{ 1055173273Ssam struct ieee80211com *ic = ni->ni_ic; 1056173273Ssam 1057173273Ssam IEEE80211_LOCK_ASSERT(ic); 1058173273Ssam 1059173273Ssam if (ni->ni_flags & IEEE80211_NODE_HT) { 1060173273Ssam ic->ic_ht_sta_assoc--; 1061173273Ssam if (ni->ni_chw == 40) 1062173273Ssam ic->ic_ht40_sta_assoc--; 1063173273Ssam } 1064173273Ssam htinfo_update(ic); 1065173273Ssam} 1066173273Ssam 1067173273Ssam/* 1068173273Ssam * Public version of htinfo_update; used for processing 1069178354Ssam * beacon frames from overlapping bss. 1070178354Ssam * 1071178354Ssam * Caller can specify either IEEE80211_HTINFO_OPMODE_MIXED 1072178354Ssam * (on receipt of a beacon that advertises MIXED) or 1073178354Ssam * IEEE80211_HTINFO_OPMODE_PROTOPT (on receipt of a beacon 1074178354Ssam * from an overlapping legacy bss). We treat MIXED with 1075178354Ssam * a higher precedence than PROTOPT (i.e. we will not change 1076178354Ssam * change PROTOPT -> MIXED; only MIXED -> PROTOPT). This 1077178354Ssam * corresponds to how we handle things in htinfo_update. 1078173273Ssam */ 1079173273Ssamvoid 1080178354Ssamieee80211_htprot_update(struct ieee80211com *ic, int protmode) 1081173273Ssam{ 1082178354Ssam#define OPMODE(x) SM(x, IEEE80211_HTINFO_OPMODE) 1083178354Ssam if (protmode == ic->ic_curhtprotmode) 1084178354Ssam return; 1085178354Ssam if (OPMODE(ic->ic_curhtprotmode) == IEEE80211_HTINFO_OPMODE_MIXED && 1086178354Ssam OPMODE(protmode) == IEEE80211_HTINFO_OPMODE_PROTOPT) 1087178354Ssam return; 1088178354Ssam 1089181197Ssam IEEE80211_LOCK(ic); 1090178354Ssam /* track non-HT station presence */ 1091178354Ssam KASSERT(protmode & IEEE80211_HTINFO_NONHT_PRESENT, 1092178354Ssam ("missing NONHT_PRESENT")); 1093178354Ssam ic->ic_flags_ext |= IEEE80211_FEXT_NONHT_PR; 1094178354Ssam ic->ic_lastnonht = ticks; 1095178354Ssam 1096178354Ssam /* push beacon update */ 1097178354Ssam ic->ic_curhtprotmode = protmode; 1098178354Ssam htinfo_notify(ic); 1099181197Ssam IEEE80211_UNLOCK(ic); 1100178354Ssam#undef OPMODE 1101173273Ssam} 1102173273Ssam 1103173273Ssam/* 1104173273Ssam * Time out presence of an overlapping bss with non-HT 1105173273Ssam * stations. When operating in hostap mode we listen for 1106173273Ssam * beacons from other stations and if we identify a non-HT 1107173273Ssam * station is present we update the opmode field of the 1108173273Ssam * HTINFO ie. To identify when all non-HT stations are 1109173273Ssam * gone we time out this condition. 1110173273Ssam */ 1111173273Ssamvoid 1112173273Ssamieee80211_ht_timeout(struct ieee80211com *ic) 1113173273Ssam{ 1114173273Ssam IEEE80211_LOCK_ASSERT(ic); 1115173273Ssam 1116173273Ssam if ((ic->ic_flags_ext & IEEE80211_FEXT_NONHT_PR) && 1117173273Ssam time_after(ticks, ic->ic_lastnonht + IEEE80211_NONHT_PRESENT_AGE)) { 1118173273Ssam#if 0 1119178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni, 1120173273Ssam "%s", "time out non-HT STA present on channel"); 1121173273Ssam#endif 1122173273Ssam ic->ic_flags_ext &= ~IEEE80211_FEXT_NONHT_PR; 1123173273Ssam htinfo_update(ic); 1124173273Ssam } 1125173273Ssam} 1126173273Ssam 1127170530Ssam/* unalligned little endian access */ 1128170530Ssam#define LE_READ_2(p) \ 1129170530Ssam ((uint16_t) \ 1130170530Ssam ((((const uint8_t *)(p))[0] ) | \ 1131170530Ssam (((const uint8_t *)(p))[1] << 8))) 1132170530Ssam 1133170530Ssam/* 1134170530Ssam * Process an 802.11n HT capabilities ie. 1135170530Ssam */ 1136170530Ssamvoid 1137170530Ssamieee80211_parse_htcap(struct ieee80211_node *ni, const uint8_t *ie) 1138170530Ssam{ 1139178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1140170530Ssam 1141170530Ssam if (ie[0] == IEEE80211_ELEMID_VENDOR) { 1142170530Ssam /* 1143170530Ssam * Station used Vendor OUI ie to associate; 1144170530Ssam * mark the node so when we respond we'll use 1145170530Ssam * the Vendor OUI's and not the standard ie's. 1146170530Ssam */ 1147170530Ssam ni->ni_flags |= IEEE80211_NODE_HTCOMPAT; 1148170530Ssam ie += 4; 1149170530Ssam } else 1150170530Ssam ni->ni_flags &= ~IEEE80211_NODE_HTCOMPAT; 1151170530Ssam 1152170530Ssam ni->ni_htcap = LE_READ_2(ie + 1153170530Ssam __offsetof(struct ieee80211_ie_htcap, hc_cap)); 1154170530Ssam ni->ni_htparam = ie[__offsetof(struct ieee80211_ie_htcap, hc_param)]; 1155173273Ssam /* XXX needed or will ieee80211_parse_htinfo always be called? */ 1156173273Ssam ni->ni_chw = (ni->ni_htcap & IEEE80211_HTCAP_CHWIDTH40) && 1157178354Ssam (vap->iv_flags_ext & IEEE80211_FEXT_USEHT40) ? 40 : 20; 1158170530Ssam} 1159170530Ssam 1160170530Ssam/* 1161173273Ssam * Process an 802.11n HT info ie and update the node state. 1162173273Ssam * Note that we handle use this information to identify the 1163173273Ssam * correct channel (HT20, HT40+, HT40-, legacy). The caller 1164173273Ssam * is responsible for insuring any required channel change is 1165173273Ssam * done (e.g. in sta mode when parsing the contents of a 1166173273Ssam * beacon frame). 1167170530Ssam */ 1168170530Ssamvoid 1169170530Ssamieee80211_parse_htinfo(struct ieee80211_node *ni, const uint8_t *ie) 1170170530Ssam{ 1171173273Ssam struct ieee80211com *ic = ni->ni_ic; 1172178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1173170530Ssam const struct ieee80211_ie_htinfo *htinfo; 1174173273Ssam struct ieee80211_channel *c; 1175170530Ssam uint16_t w; 1176173273Ssam int htflags, chanflags; 1177170530Ssam 1178170530Ssam if (ie[0] == IEEE80211_ELEMID_VENDOR) 1179170530Ssam ie += 4; 1180170530Ssam htinfo = (const struct ieee80211_ie_htinfo *) ie; 1181170530Ssam ni->ni_htctlchan = htinfo->hi_ctrlchannel; 1182170530Ssam ni->ni_ht2ndchan = SM(htinfo->hi_byte1, IEEE80211_HTINFO_2NDCHAN); 1183172055Ssam w = LE_READ_2(&htinfo->hi_byte2); 1184170530Ssam ni->ni_htopmode = SM(w, IEEE80211_HTINFO_OPMODE); 1185170530Ssam w = LE_READ_2(&htinfo->hi_byte45); 1186170530Ssam ni->ni_htstbc = SM(w, IEEE80211_HTINFO_BASIC_STBCMCS); 1187173273Ssam /* 1188173273Ssam * Handle 11n channel switch. Use the received HT ie's to 1189173273Ssam * identify the right channel to use. If we cannot locate it 1190173273Ssam * in the channel table then fallback to legacy operation. 1191173273Ssam */ 1192178354Ssam /* NB: honor operating mode constraint */ 1193178354Ssam htflags = (vap->iv_flags_ext & IEEE80211_FEXT_HT) ? 1194173273Ssam IEEE80211_CHAN_HT20 : 0; 1195173273Ssam if ((htinfo->hi_byte1 & IEEE80211_HTINFO_TXWIDTH_2040) && 1196178354Ssam (vap->iv_flags_ext & IEEE80211_FEXT_USEHT40)) { 1197173273Ssam if (ni->ni_ht2ndchan == IEEE80211_HTINFO_2NDCHAN_ABOVE) 1198173273Ssam htflags = IEEE80211_CHAN_HT40U; 1199173273Ssam else if (ni->ni_ht2ndchan == IEEE80211_HTINFO_2NDCHAN_BELOW) 1200173273Ssam htflags = IEEE80211_CHAN_HT40D; 1201170530Ssam } 1202173273Ssam chanflags = (ni->ni_chan->ic_flags &~ IEEE80211_CHAN_HT) | htflags; 1203173273Ssam if (chanflags != ni->ni_chan->ic_flags) { 1204173273Ssam c = ieee80211_find_channel(ic, ni->ni_chan->ic_freq, chanflags); 1205178354Ssam if (c == NULL && (htflags & IEEE80211_CHAN_HT40)) { 1206173273Ssam /* 1207173273Ssam * No HT40 channel entry in our table; fall back 1208173273Ssam * to HT20 operation. This should not happen. 1209173273Ssam */ 1210173273Ssam c = findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT20); 1211178354Ssam IEEE80211_NOTE(vap, 1212173273Ssam IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni, 1213173273Ssam "no HT40 channel (freq %u), falling back to HT20", 1214173273Ssam ni->ni_chan->ic_freq); 1215173273Ssam /* XXX stat */ 1216173273Ssam } 1217173273Ssam if (c != NULL && c != ni->ni_chan) { 1218178354Ssam IEEE80211_NOTE(vap, 1219173273Ssam IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni, 1220173273Ssam "switch station to HT%d channel %u/0x%x", 1221173273Ssam IEEE80211_IS_CHAN_HT40(c) ? 40 : 20, 1222173273Ssam c->ic_freq, c->ic_flags); 1223173273Ssam ni->ni_chan = c; 1224173273Ssam } 1225173273Ssam /* NB: caller responsible for forcing any channel change */ 1226173273Ssam } 1227173273Ssam /* update node's tx channel width */ 1228173273Ssam ni->ni_chw = IEEE80211_IS_CHAN_HT40(ni->ni_chan)? 40 : 20; 1229170530Ssam} 1230170530Ssam 1231170530Ssam/* 1232170530Ssam * Install received HT rate set by parsing the HT cap ie. 1233170530Ssam */ 1234170530Ssamint 1235170530Ssamieee80211_setup_htrates(struct ieee80211_node *ni, const uint8_t *ie, int flags) 1236170530Ssam{ 1237178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1238170530Ssam const struct ieee80211_ie_htcap *htcap; 1239170530Ssam struct ieee80211_htrateset *rs; 1240170530Ssam int i; 1241170530Ssam 1242170530Ssam rs = &ni->ni_htrates; 1243170530Ssam memset(rs, 0, sizeof(*rs)); 1244170530Ssam if (ie != NULL) { 1245170530Ssam if (ie[0] == IEEE80211_ELEMID_VENDOR) 1246170530Ssam ie += 4; 1247170530Ssam htcap = (const struct ieee80211_ie_htcap *) ie; 1248170530Ssam for (i = 0; i < IEEE80211_HTRATE_MAXSIZE; i++) { 1249170530Ssam if (isclr(htcap->hc_mcsset, i)) 1250170530Ssam continue; 1251170530Ssam if (rs->rs_nrates == IEEE80211_HTRATE_MAXSIZE) { 1252178354Ssam IEEE80211_NOTE(vap, 1253170530Ssam IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni, 1254170530Ssam "WARNING, HT rate set too large; only " 1255170530Ssam "using %u rates", IEEE80211_HTRATE_MAXSIZE); 1256178354Ssam vap->iv_stats.is_rx_rstoobig++; 1257170530Ssam break; 1258170530Ssam } 1259170530Ssam rs->rs_rates[rs->rs_nrates++] = i; 1260170530Ssam } 1261170530Ssam } 1262170530Ssam return ieee80211_fix_rate(ni, (struct ieee80211_rateset *) rs, flags); 1263170530Ssam} 1264170530Ssam 1265170530Ssam/* 1266170530Ssam * Mark rates in a node's HT rate set as basic according 1267170530Ssam * to the information in the supplied HT info ie. 1268170530Ssam */ 1269170530Ssamvoid 1270170530Ssamieee80211_setup_basic_htrates(struct ieee80211_node *ni, const uint8_t *ie) 1271170530Ssam{ 1272170530Ssam const struct ieee80211_ie_htinfo *htinfo; 1273170530Ssam struct ieee80211_htrateset *rs; 1274170530Ssam int i, j; 1275170530Ssam 1276170530Ssam if (ie[0] == IEEE80211_ELEMID_VENDOR) 1277170530Ssam ie += 4; 1278170530Ssam htinfo = (const struct ieee80211_ie_htinfo *) ie; 1279170530Ssam rs = &ni->ni_htrates; 1280170530Ssam if (rs->rs_nrates == 0) { 1281178354Ssam IEEE80211_NOTE(ni->ni_vap, 1282170530Ssam IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni, 1283170530Ssam "%s", "WARNING, empty HT rate set"); 1284170530Ssam return; 1285170530Ssam } 1286170530Ssam for (i = 0; i < IEEE80211_HTRATE_MAXSIZE; i++) { 1287170530Ssam if (isclr(htinfo->hi_basicmcsset, i)) 1288170530Ssam continue; 1289170530Ssam for (j = 0; j < rs->rs_nrates; j++) 1290170530Ssam if ((rs->rs_rates[j] & IEEE80211_RATE_VAL) == i) 1291170530Ssam rs->rs_rates[j] |= IEEE80211_RATE_BASIC; 1292170530Ssam } 1293170530Ssam} 1294170530Ssam 1295170530Ssamstatic void 1296170530Ssamaddba_timeout(void *arg) 1297170530Ssam{ 1298170530Ssam struct ieee80211_tx_ampdu *tap = arg; 1299170530Ssam 1300170530Ssam /* XXX ? */ 1301170530Ssam tap->txa_flags &= ~IEEE80211_AGGR_XCHGPEND; 1302170530Ssam tap->txa_attempts++; 1303170530Ssam} 1304170530Ssam 1305170530Ssamstatic void 1306170530Ssamaddba_start_timeout(struct ieee80211_tx_ampdu *tap) 1307170530Ssam{ 1308170530Ssam /* XXX use CALLOUT_PENDING instead? */ 1309178354Ssam callout_reset(&tap->txa_timer, ieee80211_addba_timeout, 1310170530Ssam addba_timeout, tap); 1311170530Ssam tap->txa_flags |= IEEE80211_AGGR_XCHGPEND; 1312178354Ssam tap->txa_nextrequest = ticks + ieee80211_addba_timeout; 1313170530Ssam} 1314170530Ssam 1315170530Ssamstatic void 1316170530Ssamaddba_stop_timeout(struct ieee80211_tx_ampdu *tap) 1317170530Ssam{ 1318170530Ssam /* XXX use CALLOUT_PENDING instead? */ 1319170530Ssam if (tap->txa_flags & IEEE80211_AGGR_XCHGPEND) { 1320170530Ssam callout_stop(&tap->txa_timer); 1321170530Ssam tap->txa_flags &= ~IEEE80211_AGGR_XCHGPEND; 1322170530Ssam } 1323170530Ssam} 1324170530Ssam 1325170530Ssam/* 1326170530Ssam * Default method for requesting A-MPDU tx aggregation. 1327170530Ssam * We setup the specified state block and start a timer 1328170530Ssam * to wait for an ADDBA response frame. 1329170530Ssam */ 1330170530Ssamstatic int 1331170530Ssamieee80211_addba_request(struct ieee80211_node *ni, 1332170530Ssam struct ieee80211_tx_ampdu *tap, 1333170530Ssam int dialogtoken, int baparamset, int batimeout) 1334170530Ssam{ 1335170530Ssam int bufsiz; 1336170530Ssam 1337170530Ssam /* XXX locking */ 1338170530Ssam tap->txa_token = dialogtoken; 1339170530Ssam tap->txa_flags |= IEEE80211_AGGR_IMMEDIATE; 1340170530Ssam tap->txa_start = tap->txa_seqstart = 0; 1341170530Ssam bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ); 1342170530Ssam tap->txa_wnd = (bufsiz == 0) ? 1343170530Ssam IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX); 1344170530Ssam addba_start_timeout(tap); 1345170530Ssam return 1; 1346170530Ssam} 1347170530Ssam 1348170530Ssam/* 1349170530Ssam * Default method for processing an A-MPDU tx aggregation 1350170530Ssam * response. We shutdown any pending timer and update the 1351170530Ssam * state block according to the reply. 1352170530Ssam */ 1353170530Ssamstatic int 1354170530Ssamieee80211_addba_response(struct ieee80211_node *ni, 1355170530Ssam struct ieee80211_tx_ampdu *tap, 1356170530Ssam int status, int baparamset, int batimeout) 1357170530Ssam{ 1358170530Ssam int bufsiz; 1359170530Ssam 1360170530Ssam /* XXX locking */ 1361170530Ssam addba_stop_timeout(tap); 1362170530Ssam if (status == IEEE80211_STATUS_SUCCESS) { 1363170530Ssam bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ); 1364170530Ssam /* XXX override our request? */ 1365170530Ssam tap->txa_wnd = (bufsiz == 0) ? 1366170530Ssam IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX); 1367170530Ssam tap->txa_flags |= IEEE80211_AGGR_RUNNING; 1368173273Ssam } else { 1369173273Ssam /* mark tid so we don't try again */ 1370173273Ssam tap->txa_flags |= IEEE80211_AGGR_NAK; 1371170530Ssam } 1372170530Ssam return 1; 1373170530Ssam} 1374170530Ssam 1375170530Ssam/* 1376170530Ssam * Default method for stopping A-MPDU tx aggregation. 1377170530Ssam * Any timer is cleared and we drain any pending frames. 1378170530Ssam */ 1379170530Ssamstatic void 1380170530Ssamieee80211_addba_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap) 1381170530Ssam{ 1382170530Ssam /* XXX locking */ 1383170530Ssam addba_stop_timeout(tap); 1384170530Ssam if (tap->txa_flags & IEEE80211_AGGR_RUNNING) { 1385182830Ssam /* XXX clear aggregation queue */ 1386170530Ssam tap->txa_flags &= ~IEEE80211_AGGR_RUNNING; 1387170530Ssam } 1388170530Ssam tap->txa_attempts = 0; 1389170530Ssam} 1390170530Ssam 1391170530Ssam/* 1392170530Ssam * Process a received action frame using the default aggregation 1393170530Ssam * policy. We intercept ADDBA-related frames and use them to 1394170530Ssam * update our aggregation state. All other frames are passed up 1395170530Ssam * for processing by ieee80211_recv_action. 1396170530Ssam */ 1397170530Ssamstatic void 1398170530Ssamieee80211_aggr_recv_action(struct ieee80211_node *ni, 1399170530Ssam const uint8_t *frm, const uint8_t *efrm) 1400170530Ssam{ 1401170530Ssam struct ieee80211com *ic = ni->ni_ic; 1402178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1403170530Ssam const struct ieee80211_action *ia; 1404170530Ssam struct ieee80211_rx_ampdu *rap; 1405170530Ssam struct ieee80211_tx_ampdu *tap; 1406182829Ssam uint8_t dialogtoken, policy; 1407170530Ssam uint16_t baparamset, batimeout, baseqctl, code; 1408170530Ssam uint16_t args[4]; 1409170530Ssam int tid, ac, bufsiz; 1410170530Ssam 1411170530Ssam ia = (const struct ieee80211_action *) frm; 1412170530Ssam switch (ia->ia_category) { 1413170530Ssam case IEEE80211_ACTION_CAT_BA: 1414170530Ssam switch (ia->ia_action) { 1415170530Ssam case IEEE80211_ACTION_BA_ADDBA_REQUEST: 1416170530Ssam dialogtoken = frm[2]; 1417170530Ssam baparamset = LE_READ_2(frm+3); 1418170530Ssam batimeout = LE_READ_2(frm+5); 1419170530Ssam baseqctl = LE_READ_2(frm+7); 1420170530Ssam 1421170530Ssam tid = MS(baparamset, IEEE80211_BAPS_TID); 1422170530Ssam bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ); 1423170530Ssam 1424178354Ssam IEEE80211_NOTE(vap, 1425170530Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 1426170530Ssam "recv ADDBA request: dialogtoken %u " 1427170530Ssam "baparamset 0x%x (tid %d bufsiz %d) batimeout %d " 1428173273Ssam "baseqctl %d:%d", 1429173273Ssam dialogtoken, baparamset, tid, bufsiz, batimeout, 1430173273Ssam MS(baseqctl, IEEE80211_BASEQ_START), 1431173273Ssam MS(baseqctl, IEEE80211_BASEQ_FRAG)); 1432170530Ssam 1433170530Ssam rap = &ni->ni_rx_ampdu[tid]; 1434170530Ssam 1435170530Ssam /* Send ADDBA response */ 1436170530Ssam args[0] = dialogtoken; 1437173273Ssam /* 1438173273Ssam * NB: We ack only if the sta associated with HT and 1439173273Ssam * the ap is configured to do AMPDU rx (the latter 1440173273Ssam * violates the 11n spec and is mostly for testing). 1441173273Ssam */ 1442173273Ssam if ((ni->ni_flags & IEEE80211_NODE_AMPDU_RX) && 1443178354Ssam (vap->iv_flags_ext & IEEE80211_FEXT_AMPDU_RX)) { 1444170530Ssam ampdu_rx_start(rap, bufsiz, 1445170530Ssam MS(baseqctl, IEEE80211_BASEQ_START)); 1446170530Ssam 1447170530Ssam args[1] = IEEE80211_STATUS_SUCCESS; 1448173273Ssam } else { 1449178354Ssam IEEE80211_NOTE(vap, 1450173273Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 1451173273Ssam ni, "reject ADDBA request: %s", 1452173273Ssam ni->ni_flags & IEEE80211_NODE_AMPDU_RX ? 1453173273Ssam "administratively disabled" : 1454173273Ssam "not negotiated for station"); 1455178354Ssam vap->iv_stats.is_addba_reject++; 1456170530Ssam args[1] = IEEE80211_STATUS_UNSPECIFIED; 1457173273Ssam } 1458170530Ssam /* XXX honor rap flags? */ 1459170530Ssam args[2] = IEEE80211_BAPS_POLICY_IMMEDIATE 1460170530Ssam | SM(tid, IEEE80211_BAPS_TID) 1461170530Ssam | SM(rap->rxa_wnd, IEEE80211_BAPS_BUFSIZ) 1462170530Ssam ; 1463170530Ssam args[3] = 0; 1464170530Ssam ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA, 1465170530Ssam IEEE80211_ACTION_BA_ADDBA_RESPONSE, args); 1466170530Ssam return; 1467170530Ssam 1468170530Ssam case IEEE80211_ACTION_BA_ADDBA_RESPONSE: 1469170530Ssam dialogtoken = frm[2]; 1470170530Ssam code = LE_READ_2(frm+3); 1471170530Ssam baparamset = LE_READ_2(frm+5); 1472170530Ssam tid = MS(baparamset, IEEE80211_BAPS_TID); 1473170530Ssam bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ); 1474182829Ssam policy = MS(baparamset, IEEE80211_BAPS_POLICY); 1475170530Ssam batimeout = LE_READ_2(frm+7); 1476170530Ssam 1477173273Ssam ac = TID_TO_WME_AC(tid); 1478173273Ssam tap = &ni->ni_tx_ampdu[ac]; 1479175877Ssam if ((tap->txa_flags & IEEE80211_AGGR_XCHGPEND) == 0) { 1480178354Ssam IEEE80211_DISCARD_MAC(vap, 1481173273Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 1482173273Ssam ni->ni_macaddr, "ADDBA response", 1483173273Ssam "no pending ADDBA, tid %d dialogtoken %u " 1484173273Ssam "code %d", tid, dialogtoken, code); 1485178354Ssam vap->iv_stats.is_addba_norequest++; 1486173273Ssam return; 1487173273Ssam } 1488173273Ssam if (dialogtoken != tap->txa_token) { 1489178354Ssam IEEE80211_DISCARD_MAC(vap, 1490173273Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 1491173273Ssam ni->ni_macaddr, "ADDBA response", 1492173273Ssam "dialogtoken mismatch: waiting for %d, " 1493173273Ssam "received %d, tid %d code %d", 1494173273Ssam tap->txa_token, dialogtoken, tid, code); 1495178354Ssam vap->iv_stats.is_addba_badtoken++; 1496173273Ssam return; 1497173273Ssam } 1498182829Ssam /* NB: assumes IEEE80211_AGGR_IMMEDIATE is 1 */ 1499182829Ssam if (policy != (tap->txa_flags & IEEE80211_AGGR_IMMEDIATE)) { 1500182829Ssam IEEE80211_DISCARD_MAC(vap, 1501182829Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 1502182829Ssam ni->ni_macaddr, "ADDBA response", 1503182829Ssam "policy mismatch: expecting %s, " 1504182829Ssam "received %s, tid %d code %d", 1505182829Ssam tap->txa_flags & IEEE80211_AGGR_IMMEDIATE, 1506182829Ssam policy, tid, code); 1507182829Ssam vap->iv_stats.is_addba_badpolicy++; 1508182829Ssam return; 1509182829Ssam } 1510182829Ssam#if 0 1511182829Ssam /* XXX we take MIN in ieee80211_addba_response */ 1512182829Ssam if (bufsiz > IEEE80211_AGGR_BAWMAX) { 1513182829Ssam IEEE80211_DISCARD_MAC(vap, 1514182829Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 1515182829Ssam ni->ni_macaddr, "ADDBA response", 1516182829Ssam "BA window too large: max %d, " 1517182829Ssam "received %d, tid %d code %d", 1518182829Ssam bufsiz, IEEE80211_AGGR_BAWMAX, tid, code); 1519182829Ssam vap->iv_stats.is_addba_badbawinsize++; 1520182829Ssam return; 1521182829Ssam } 1522182829Ssam#endif 1523173273Ssam 1524178354Ssam IEEE80211_NOTE(vap, 1525170530Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 1526170530Ssam "recv ADDBA response: dialogtoken %u code %d " 1527170530Ssam "baparamset 0x%x (tid %d bufsiz %d) batimeout %d", 1528170530Ssam dialogtoken, code, baparamset, tid, bufsiz, 1529170530Ssam batimeout); 1530170530Ssam ic->ic_addba_response(ni, tap, 1531170530Ssam code, baparamset, batimeout); 1532170530Ssam return; 1533170530Ssam 1534170530Ssam case IEEE80211_ACTION_BA_DELBA: 1535170530Ssam baparamset = LE_READ_2(frm+2); 1536170530Ssam code = LE_READ_2(frm+4); 1537170530Ssam 1538170530Ssam tid = MS(baparamset, IEEE80211_DELBAPS_TID); 1539170530Ssam 1540178354Ssam IEEE80211_NOTE(vap, 1541170530Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 1542170530Ssam "recv DELBA: baparamset 0x%x (tid %d initiator %d) " 1543170530Ssam "code %d", baparamset, tid, 1544170530Ssam MS(baparamset, IEEE80211_DELBAPS_INIT), code); 1545170530Ssam 1546170530Ssam if ((baparamset & IEEE80211_DELBAPS_INIT) == 0) { 1547170530Ssam ac = TID_TO_WME_AC(tid); 1548170530Ssam tap = &ni->ni_tx_ampdu[ac]; 1549170530Ssam ic->ic_addba_stop(ni, tap); 1550170530Ssam } else { 1551170530Ssam rap = &ni->ni_rx_ampdu[tid]; 1552170530Ssam ampdu_rx_stop(rap); 1553170530Ssam } 1554170530Ssam return; 1555170530Ssam } 1556170530Ssam break; 1557170530Ssam } 1558173273Ssam ieee80211_recv_action(ni, frm, efrm); 1559170530Ssam} 1560170530Ssam 1561170530Ssam/* 1562170530Ssam * Process a received 802.11n action frame. 1563170530Ssam * Aggregation-related frames are assumed to be handled 1564170530Ssam * already; we handle any other frames we can, otherwise 1565170530Ssam * complain about being unsupported (with debugging). 1566170530Ssam */ 1567170530Ssamvoid 1568170530Ssamieee80211_recv_action(struct ieee80211_node *ni, 1569170530Ssam const uint8_t *frm, const uint8_t *efrm) 1570170530Ssam{ 1571178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1572170530Ssam const struct ieee80211_action *ia; 1573170530Ssam int chw; 1574170530Ssam 1575170530Ssam ia = (const struct ieee80211_action *) frm; 1576170530Ssam switch (ia->ia_category) { 1577170530Ssam case IEEE80211_ACTION_CAT_BA: 1578178354Ssam IEEE80211_NOTE(vap, 1579170530Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 1580170530Ssam "%s: BA action %d not implemented", __func__, 1581170530Ssam ia->ia_action); 1582178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1583170530Ssam break; 1584170530Ssam case IEEE80211_ACTION_CAT_HT: 1585170530Ssam switch (ia->ia_action) { 1586170530Ssam case IEEE80211_ACTION_HT_TXCHWIDTH: 1587170530Ssam chw = frm[2] == IEEE80211_A_HT_TXCHWIDTH_2040 ? 40 : 20; 1588170530Ssam if (chw != ni->ni_chw) { 1589170530Ssam ni->ni_chw = chw; 1590170530Ssam ni->ni_flags |= IEEE80211_NODE_CHWUPDATE; 1591170530Ssam } 1592178354Ssam IEEE80211_NOTE(vap, 1593170530Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 1594173273Ssam "%s: HT txchwidth, width %d (%s)", 1595170530Ssam __func__, chw, 1596170530Ssam ni->ni_flags & IEEE80211_NODE_CHWUPDATE ? 1597170530Ssam "new" : "no change"); 1598170530Ssam break; 1599173273Ssam case IEEE80211_ACTION_HT_MIMOPWRSAVE: 1600178354Ssam IEEE80211_NOTE(vap, 1601173273Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 1602173273Ssam "%s: HT MIMO PS", __func__); 1603173273Ssam break; 1604170530Ssam default: 1605178354Ssam IEEE80211_NOTE(vap, 1606170530Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 1607170530Ssam "%s: HT action %d not implemented", __func__, 1608170530Ssam ia->ia_action); 1609178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1610170530Ssam break; 1611170530Ssam } 1612170530Ssam break; 1613170530Ssam default: 1614178354Ssam IEEE80211_NOTE(vap, 1615170530Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 1616170530Ssam "%s: category %d not implemented", __func__, 1617170530Ssam ia->ia_category); 1618178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1619170530Ssam break; 1620170530Ssam } 1621170530Ssam} 1622170530Ssam 1623170530Ssam/* 1624170530Ssam * Transmit processing. 1625170530Ssam */ 1626170530Ssam 1627170530Ssam/* 1628178354Ssam * Check if A-MPDU should be requested/enabled for a stream. 1629178354Ssam * We require a traffic rate above a per-AC threshold and we 1630178354Ssam * also handle backoff from previous failed attempts. 1631178354Ssam * 1632178354Ssam * Drivers may override this method to bring in information 1633178354Ssam * such as link state conditions in making the decision. 1634178354Ssam */ 1635178354Ssamstatic int 1636178354Ssamieee80211_ampdu_enable(struct ieee80211_node *ni, 1637178354Ssam struct ieee80211_tx_ampdu *tap) 1638178354Ssam{ 1639178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1640178354Ssam 1641178354Ssam if (tap->txa_avgpps < vap->iv_ampdu_mintraffic[tap->txa_ac]) 1642178354Ssam return 0; 1643178354Ssam /* XXX check rssi? */ 1644178354Ssam if (tap->txa_attempts >= ieee80211_addba_maxtries && 1645178354Ssam ticks < tap->txa_nextrequest) { 1646178354Ssam /* 1647178354Ssam * Don't retry too often; txa_nextrequest is set 1648178354Ssam * to the minimum interval we'll retry after 1649178354Ssam * ieee80211_addba_maxtries failed attempts are made. 1650178354Ssam */ 1651178354Ssam return 0; 1652178354Ssam } 1653178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni, 1654178354Ssam "%s: enable AMPDU on %s, avgpps %d pkts %d", 1655178354Ssam __func__, ieee80211_wme_acnames[tap->txa_ac], 1656178354Ssam tap->txa_avgpps, tap->txa_pkts); 1657178354Ssam return 1; 1658178354Ssam} 1659178354Ssam 1660178354Ssam/* 1661170530Ssam * Request A-MPDU tx aggregation. Setup local state and 1662170530Ssam * issue an ADDBA request. BA use will only happen after 1663170530Ssam * the other end replies with ADDBA response. 1664170530Ssam */ 1665170530Ssamint 1666170530Ssamieee80211_ampdu_request(struct ieee80211_node *ni, 1667170530Ssam struct ieee80211_tx_ampdu *tap) 1668170530Ssam{ 1669170530Ssam struct ieee80211com *ic = ni->ni_ic; 1670170530Ssam uint16_t args[4]; 1671170530Ssam int tid, dialogtoken; 1672170530Ssam static int tokens = 0; /* XXX */ 1673170530Ssam 1674170530Ssam /* XXX locking */ 1675170530Ssam if ((tap->txa_flags & IEEE80211_AGGR_SETUP) == 0) { 1676170530Ssam /* do deferred setup of state */ 1677170530Ssam callout_init(&tap->txa_timer, CALLOUT_MPSAFE); 1678170530Ssam tap->txa_flags |= IEEE80211_AGGR_SETUP; 1679170530Ssam } 1680173273Ssam /* XXX hack for not doing proper locking */ 1681173273Ssam tap->txa_flags &= ~IEEE80211_AGGR_NAK; 1682173273Ssam 1683170530Ssam dialogtoken = (tokens+1) % 63; /* XXX */ 1684170530Ssam 1685170530Ssam tid = WME_AC_TO_TID(tap->txa_ac); 1686170530Ssam args[0] = dialogtoken; 1687170530Ssam args[1] = IEEE80211_BAPS_POLICY_IMMEDIATE 1688170530Ssam | SM(tid, IEEE80211_BAPS_TID) 1689170530Ssam | SM(IEEE80211_AGGR_BAWMAX, IEEE80211_BAPS_BUFSIZ) 1690170530Ssam ; 1691170530Ssam args[2] = 0; /* batimeout */ 1692170530Ssam /* NB: do first so there's no race against reply */ 1693170530Ssam if (!ic->ic_addba_request(ni, tap, dialogtoken, args[1], args[2])) { 1694170530Ssam /* unable to setup state, don't make request */ 1695178354Ssam IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 1696173273Ssam ni, "%s: could not setup BA stream for AC %d", 1697173273Ssam __func__, tap->txa_ac); 1698173273Ssam /* defer next try so we don't slam the driver with requests */ 1699178354Ssam tap->txa_attempts = ieee80211_addba_maxtries; 1700178354Ssam /* NB: check in case driver wants to override */ 1701178354Ssam if (tap->txa_nextrequest <= ticks) 1702178354Ssam tap->txa_nextrequest = ticks + ieee80211_addba_backoff; 1703170530Ssam return 0; 1704170530Ssam } 1705170530Ssam tokens = dialogtoken; /* allocate token */ 1706178953Ssam /* NB: after calling ic_addba_request so driver can set seqstart */ 1707178953Ssam args[3] = SM(tap->txa_seqstart, IEEE80211_BASEQ_START) 1708178953Ssam | SM(0, IEEE80211_BASEQ_FRAG) 1709178953Ssam ; 1710170530Ssam return ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA, 1711170530Ssam IEEE80211_ACTION_BA_ADDBA_REQUEST, args); 1712170530Ssam} 1713170530Ssam 1714170530Ssam/* 1715173273Ssam * Terminate an AMPDU tx stream. State is reclaimed 1716173273Ssam * and the peer notified with a DelBA Action frame. 1717173273Ssam */ 1718173273Ssamvoid 1719173273Ssamieee80211_ampdu_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap) 1720173273Ssam{ 1721173273Ssam struct ieee80211com *ic = ni->ni_ic; 1722178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1723173273Ssam uint16_t args[4]; 1724173273Ssam 1725173273Ssam /* XXX locking */ 1726173273Ssam if (IEEE80211_AMPDU_RUNNING(tap)) { 1727178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 1728173273Ssam ni, "%s: stop BA stream for AC %d", __func__, tap->txa_ac); 1729178354Ssam vap->iv_stats.is_ampdu_stop++; 1730173273Ssam 1731173273Ssam ic->ic_addba_stop(ni, tap); 1732173273Ssam args[0] = WME_AC_TO_TID(tap->txa_ac); 1733173273Ssam args[1] = IEEE80211_DELBAPS_INIT; 1734173273Ssam args[2] = 1; /* XXX reason code */ 1735173273Ssam ieee80211_send_action(ni, IEEE80211_ACTION_CAT_BA, 1736173273Ssam IEEE80211_ACTION_BA_DELBA, args); 1737173273Ssam } else { 1738178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 1739173273Ssam ni, "%s: BA stream for AC %d not running", 1740173273Ssam __func__, tap->txa_ac); 1741178354Ssam vap->iv_stats.is_ampdu_stop_failed++; 1742173273Ssam } 1743173273Ssam} 1744173273Ssam 1745173273Ssam/* 1746170530Ssam * Transmit a BAR frame to the specified node. The 1747170530Ssam * BAR contents are drawn from the supplied aggregation 1748170530Ssam * state associated with the node. 1749170530Ssam */ 1750170530Ssamint 1751170530Ssamieee80211_send_bar(struct ieee80211_node *ni, 1752170530Ssam const struct ieee80211_tx_ampdu *tap) 1753170530Ssam{ 1754178354Ssam#define senderr(_x, _v) do { vap->iv_stats._v++; ret = _x; goto bad; } while (0) 1755170530Ssam#define ADDSHORT(frm, v) do { \ 1756170530Ssam frm[0] = (v) & 0xff; \ 1757170530Ssam frm[1] = (v) >> 8; \ 1758170530Ssam frm += 2; \ 1759170530Ssam} while (0) 1760178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1761170530Ssam struct ieee80211com *ic = ni->ni_ic; 1762170530Ssam struct ieee80211_frame_min *wh; 1763170530Ssam struct mbuf *m; 1764170530Ssam uint8_t *frm; 1765170530Ssam uint16_t barctl, barseqctl; 1766170530Ssam int tid, ret; 1767170530Ssam 1768170530Ssam ieee80211_ref_node(ni); 1769170530Ssam 1770170530Ssam m = ieee80211_getmgtframe(&frm, 1771170530Ssam ic->ic_headroom + sizeof(struct ieee80211_frame_min), 1772170530Ssam sizeof(struct ieee80211_ba_request) 1773170530Ssam ); 1774170530Ssam if (m == NULL) 1775170530Ssam senderr(ENOMEM, is_tx_nobuf); 1776170530Ssam 1777170530Ssam wh = mtod(m, struct ieee80211_frame_min *); 1778170530Ssam wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | 1779170530Ssam IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_BAR; 1780170530Ssam wh->i_fc[1] = 0; 1781170530Ssam IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_macaddr); 1782178354Ssam IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 1783170530Ssam 1784170530Ssam tid = WME_AC_TO_TID(tap->txa_ac); 1785170530Ssam barctl = (tap->txa_flags & IEEE80211_AGGR_IMMEDIATE ? 1786170530Ssam IEEE80211_BAPS_POLICY_IMMEDIATE : 1787170530Ssam IEEE80211_BAPS_POLICY_DELAYED) 1788170530Ssam | SM(tid, IEEE80211_BAPS_TID) 1789170530Ssam | SM(tap->txa_wnd, IEEE80211_BAPS_BUFSIZ) 1790170530Ssam ; 1791170530Ssam barseqctl = SM(tap->txa_start, IEEE80211_BASEQ_START) 1792170530Ssam | SM(0, IEEE80211_BASEQ_FRAG) 1793170530Ssam ; 1794170530Ssam ADDSHORT(frm, barctl); 1795170530Ssam ADDSHORT(frm, barseqctl); 1796170530Ssam m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 1797170530Ssam 1798178354Ssam M_WME_SETAC(m, WME_AC_VO); 1799178354Ssam 1800170530Ssam IEEE80211_NODE_STAT(ni, tx_mgmt); /* XXX tx_ctl? */ 1801170530Ssam 1802178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, 1803173273Ssam ni, "send bar frame (tid %u start %u) on channel %u", 1804173273Ssam tid, tap->txa_start, ieee80211_chan2ieee(ic, ic->ic_curchan)); 1805170530Ssam 1806178354Ssam return ic->ic_raw_xmit(ni, m, NULL); 1807170530Ssambad: 1808170530Ssam ieee80211_free_node(ni); 1809170530Ssam return ret; 1810170530Ssam#undef ADDSHORT 1811170530Ssam#undef senderr 1812170530Ssam} 1813170530Ssam 1814170530Ssam/* 1815170530Ssam * Send an action management frame. The arguments are stuff 1816170530Ssam * into a frame without inspection; the caller is assumed to 1817170530Ssam * prepare them carefully (e.g. based on the aggregation state). 1818170530Ssam */ 1819170530Ssamint 1820170530Ssamieee80211_send_action(struct ieee80211_node *ni, 1821170530Ssam int category, int action, uint16_t args[4]) 1822170530Ssam{ 1823178354Ssam#define senderr(_x, _v) do { vap->iv_stats._v++; ret = _x; goto bad; } while (0) 1824170530Ssam#define ADDSHORT(frm, v) do { \ 1825170530Ssam frm[0] = (v) & 0xff; \ 1826170530Ssam frm[1] = (v) >> 8; \ 1827170530Ssam frm += 2; \ 1828170530Ssam} while (0) 1829178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1830170530Ssam struct ieee80211com *ic = ni->ni_ic; 1831170530Ssam struct mbuf *m; 1832170530Ssam uint8_t *frm; 1833170530Ssam uint16_t baparamset; 1834170530Ssam int ret; 1835170530Ssam 1836170530Ssam KASSERT(ni != NULL, ("null node")); 1837170530Ssam 1838170530Ssam /* 1839170530Ssam * Hold a reference on the node so it doesn't go away until after 1840170530Ssam * the xmit is complete all the way in the driver. On error we 1841170530Ssam * will remove our reference. 1842170530Ssam */ 1843178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1844170530Ssam "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", 1845170530Ssam __func__, __LINE__, 1846170530Ssam ni, ether_sprintf(ni->ni_macaddr), 1847170530Ssam ieee80211_node_refcnt(ni)+1); 1848170530Ssam ieee80211_ref_node(ni); 1849170530Ssam 1850170530Ssam m = ieee80211_getmgtframe(&frm, 1851170530Ssam ic->ic_headroom + sizeof(struct ieee80211_frame), 1852170530Ssam sizeof(uint16_t) /* action+category */ 1853170530Ssam /* XXX may action payload */ 1854170530Ssam + sizeof(struct ieee80211_action_ba_addbaresponse) 1855170530Ssam ); 1856170530Ssam if (m == NULL) 1857170530Ssam senderr(ENOMEM, is_tx_nobuf); 1858170530Ssam 1859170530Ssam *frm++ = category; 1860170530Ssam *frm++ = action; 1861170530Ssam switch (category) { 1862170530Ssam case IEEE80211_ACTION_CAT_BA: 1863170530Ssam switch (action) { 1864170530Ssam case IEEE80211_ACTION_BA_ADDBA_REQUEST: 1865178354Ssam IEEE80211_NOTE(vap, 1866170530Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 1867173273Ssam "send ADDBA request: dialogtoken %d " 1868173273Ssam "baparamset 0x%x (tid %d) batimeout 0x%x baseqctl 0x%x", 1869173273Ssam args[0], args[1], MS(args[1], IEEE80211_BAPS_TID), 1870173273Ssam args[2], args[3]); 1871170530Ssam 1872170530Ssam *frm++ = args[0]; /* dialog token */ 1873170530Ssam ADDSHORT(frm, args[1]); /* baparamset */ 1874170530Ssam ADDSHORT(frm, args[2]); /* batimeout */ 1875170530Ssam ADDSHORT(frm, args[3]); /* baseqctl */ 1876170530Ssam break; 1877170530Ssam case IEEE80211_ACTION_BA_ADDBA_RESPONSE: 1878178354Ssam IEEE80211_NOTE(vap, 1879170530Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 1880170530Ssam "send ADDBA response: dialogtoken %d status %d " 1881170530Ssam "baparamset 0x%x (tid %d) batimeout %d", 1882170530Ssam args[0], args[1], args[2], 1883170530Ssam MS(args[2], IEEE80211_BAPS_TID), args[3]); 1884170530Ssam 1885170530Ssam *frm++ = args[0]; /* dialog token */ 1886170530Ssam ADDSHORT(frm, args[1]); /* statuscode */ 1887170530Ssam ADDSHORT(frm, args[2]); /* baparamset */ 1888170530Ssam ADDSHORT(frm, args[3]); /* batimeout */ 1889170530Ssam break; 1890170530Ssam case IEEE80211_ACTION_BA_DELBA: 1891170530Ssam /* XXX */ 1892170530Ssam baparamset = SM(args[0], IEEE80211_DELBAPS_TID) 1893180309Ssam | args[1] 1894170530Ssam ; 1895170530Ssam ADDSHORT(frm, baparamset); 1896170530Ssam ADDSHORT(frm, args[2]); /* reason code */ 1897170530Ssam 1898178354Ssam IEEE80211_NOTE(vap, 1899170530Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 1900170530Ssam "send DELBA action: tid %d, initiator %d reason %d", 1901170530Ssam args[0], args[1], args[2]); 1902170530Ssam break; 1903170530Ssam default: 1904170530Ssam goto badaction; 1905170530Ssam } 1906170530Ssam break; 1907170530Ssam case IEEE80211_ACTION_CAT_HT: 1908170530Ssam switch (action) { 1909170530Ssam case IEEE80211_ACTION_HT_TXCHWIDTH: 1910178354Ssam IEEE80211_NOTE(vap, 1911170530Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 1912170530Ssam ni, "send HT txchwidth: width %d", 1913178354Ssam IEEE80211_IS_CHAN_HT40(ni->ni_chan) ? 40 : 20 1914170530Ssam ); 1915178354Ssam *frm++ = IEEE80211_IS_CHAN_HT40(ni->ni_chan) ? 1916170530Ssam IEEE80211_A_HT_TXCHWIDTH_2040 : 1917170530Ssam IEEE80211_A_HT_TXCHWIDTH_20; 1918170530Ssam break; 1919170530Ssam default: 1920170530Ssam goto badaction; 1921170530Ssam } 1922170530Ssam break; 1923170530Ssam default: 1924170530Ssam badaction: 1925178354Ssam IEEE80211_NOTE(vap, 1926170530Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 1927170530Ssam "%s: unsupported category %d action %d", __func__, 1928170530Ssam category, action); 1929170530Ssam senderr(EINVAL, is_tx_unknownmgt); 1930170530Ssam /* NOTREACHED */ 1931170530Ssam } 1932170530Ssam m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 1933170530Ssam 1934178354Ssam return ieee80211_mgmt_output(ni, m, IEEE80211_FC0_SUBTYPE_ACTION); 1935170530Ssambad: 1936170530Ssam ieee80211_free_node(ni); 1937178354Ssam if (m != NULL) 1938178354Ssam m_freem(m); 1939170530Ssam return ret; 1940170530Ssam#undef ADDSHORT 1941170530Ssam#undef senderr 1942170530Ssam} 1943170530Ssam 1944170530Ssam/* 1945170530Ssam * Construct the MCS bit mask for inclusion 1946170530Ssam * in an HT information element. 1947170530Ssam */ 1948170530Ssamstatic void 1949170530Ssamieee80211_set_htrates(uint8_t *frm, const struct ieee80211_htrateset *rs) 1950170530Ssam{ 1951170530Ssam int i; 1952170530Ssam 1953170530Ssam for (i = 0; i < rs->rs_nrates; i++) { 1954170530Ssam int r = rs->rs_rates[i] & IEEE80211_RATE_VAL; 1955170530Ssam if (r < IEEE80211_HTRATE_MAXSIZE) { /* XXX? */ 1956170530Ssam /* NB: this assumes a particular implementation */ 1957170530Ssam setbit(frm, r); 1958170530Ssam } 1959170530Ssam } 1960170530Ssam} 1961170530Ssam 1962170530Ssam/* 1963170530Ssam * Add body of an HTCAP information element. 1964170530Ssam */ 1965170530Ssamstatic uint8_t * 1966170530Ssamieee80211_add_htcap_body(uint8_t *frm, struct ieee80211_node *ni) 1967170530Ssam{ 1968170530Ssam#define ADDSHORT(frm, v) do { \ 1969170530Ssam frm[0] = (v) & 0xff; \ 1970170530Ssam frm[1] = (v) >> 8; \ 1971170530Ssam frm += 2; \ 1972170530Ssam} while (0) 1973178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1974170530Ssam uint16_t caps; 1975173865Ssam int rxmax, density; 1976170530Ssam 1977170530Ssam /* HT capabilities */ 1978178354Ssam caps = vap->iv_htcaps & 0xffff; 1979173273Ssam /* 1980173273Ssam * Note channel width depends on whether we are operating as 1981173273Ssam * a sta or not. When operating as a sta we are generating 1982173273Ssam * a request based on our desired configuration. Otherwise 1983173273Ssam * we are operational and the channel attributes identify 1984173273Ssam * how we've been setup (which might be different if a fixed 1985173273Ssam * channel is specified). 1986173273Ssam */ 1987178354Ssam if (vap->iv_opmode == IEEE80211_M_STA) { 1988173273Ssam /* override 20/40 use based on config */ 1989178354Ssam if (vap->iv_flags_ext & IEEE80211_FEXT_USEHT40) 1990173273Ssam caps |= IEEE80211_HTCAP_CHWIDTH40; 1991173273Ssam else 1992173273Ssam caps &= ~IEEE80211_HTCAP_CHWIDTH40; 1993173865Ssam /* use advertised setting (XXX locally constraint) */ 1994173865Ssam rxmax = MS(ni->ni_htparam, IEEE80211_HTCAP_MAXRXAMPDU); 1995173865Ssam density = MS(ni->ni_htparam, IEEE80211_HTCAP_MPDUDENSITY); 1996173273Ssam } else { 1997173273Ssam /* override 20/40 use based on current channel */ 1998178354Ssam if (IEEE80211_IS_CHAN_HT40(ni->ni_chan)) 1999173273Ssam caps |= IEEE80211_HTCAP_CHWIDTH40; 2000173273Ssam else 2001173273Ssam caps &= ~IEEE80211_HTCAP_CHWIDTH40; 2002178354Ssam rxmax = vap->iv_ampdu_rxmax; 2003178354Ssam density = vap->iv_ampdu_density; 2004173273Ssam } 2005170530Ssam /* adjust short GI based on channel and config */ 2006178354Ssam if ((vap->iv_flags_ext & IEEE80211_FEXT_SHORTGI20) == 0) 2007170530Ssam caps &= ~IEEE80211_HTCAP_SHORTGI20; 2008178354Ssam if ((vap->iv_flags_ext & IEEE80211_FEXT_SHORTGI40) == 0 || 2009170530Ssam (caps & IEEE80211_HTCAP_CHWIDTH40) == 0) 2010170530Ssam caps &= ~IEEE80211_HTCAP_SHORTGI40; 2011170530Ssam ADDSHORT(frm, caps); 2012170530Ssam 2013170530Ssam /* HT parameters */ 2014173865Ssam *frm = SM(rxmax, IEEE80211_HTCAP_MAXRXAMPDU) 2015173865Ssam | SM(density, IEEE80211_HTCAP_MPDUDENSITY) 2016173273Ssam ; 2017170530Ssam frm++; 2018170530Ssam 2019170530Ssam /* pre-zero remainder of ie */ 2020170530Ssam memset(frm, 0, sizeof(struct ieee80211_ie_htcap) - 2021170530Ssam __offsetof(struct ieee80211_ie_htcap, hc_mcsset)); 2022170530Ssam 2023170530Ssam /* supported MCS set */ 2024173273Ssam /* 2025173273Ssam * XXX it would better to get the rate set from ni_htrates 2026173273Ssam * so we can restrict it but for sta mode ni_htrates isn't 2027173273Ssam * setup when we're called to form an AssocReq frame so for 2028173273Ssam * now we're restricted to the default HT rate set. 2029173273Ssam */ 2030173273Ssam ieee80211_set_htrates(frm, &ieee80211_rateset_11n); 2031170530Ssam 2032170530Ssam frm += sizeof(struct ieee80211_ie_htcap) - 2033170530Ssam __offsetof(struct ieee80211_ie_htcap, hc_mcsset); 2034170530Ssam return frm; 2035170530Ssam#undef ADDSHORT 2036170530Ssam} 2037170530Ssam 2038170530Ssam/* 2039170530Ssam * Add 802.11n HT capabilities information element 2040170530Ssam */ 2041170530Ssamuint8_t * 2042170530Ssamieee80211_add_htcap(uint8_t *frm, struct ieee80211_node *ni) 2043170530Ssam{ 2044170530Ssam frm[0] = IEEE80211_ELEMID_HTCAP; 2045170530Ssam frm[1] = sizeof(struct ieee80211_ie_htcap) - 2; 2046170530Ssam return ieee80211_add_htcap_body(frm + 2, ni); 2047170530Ssam} 2048170530Ssam 2049170530Ssam/* 2050170530Ssam * Add Broadcom OUI wrapped standard HTCAP ie; this is 2051170530Ssam * used for compatibility w/ pre-draft implementations. 2052170530Ssam */ 2053170530Ssamuint8_t * 2054170530Ssamieee80211_add_htcap_vendor(uint8_t *frm, struct ieee80211_node *ni) 2055170530Ssam{ 2056170530Ssam frm[0] = IEEE80211_ELEMID_VENDOR; 2057170530Ssam frm[1] = 4 + sizeof(struct ieee80211_ie_htcap) - 2; 2058170530Ssam frm[2] = (BCM_OUI >> 0) & 0xff; 2059170530Ssam frm[3] = (BCM_OUI >> 8) & 0xff; 2060170530Ssam frm[4] = (BCM_OUI >> 16) & 0xff; 2061170530Ssam frm[5] = BCM_OUI_HTCAP; 2062170530Ssam return ieee80211_add_htcap_body(frm + 6, ni); 2063170530Ssam} 2064170530Ssam 2065170530Ssam/* 2066170530Ssam * Construct the MCS bit mask of basic rates 2067170530Ssam * for inclusion in an HT information element. 2068170530Ssam */ 2069170530Ssamstatic void 2070170530Ssamieee80211_set_basic_htrates(uint8_t *frm, const struct ieee80211_htrateset *rs) 2071170530Ssam{ 2072170530Ssam int i; 2073170530Ssam 2074170530Ssam for (i = 0; i < rs->rs_nrates; i++) { 2075170530Ssam int r = rs->rs_rates[i] & IEEE80211_RATE_VAL; 2076170530Ssam if ((rs->rs_rates[i] & IEEE80211_RATE_BASIC) && 2077170530Ssam r < IEEE80211_HTRATE_MAXSIZE) { 2078170530Ssam /* NB: this assumes a particular implementation */ 2079170530Ssam setbit(frm, r); 2080170530Ssam } 2081170530Ssam } 2082170530Ssam} 2083170530Ssam 2084170530Ssam/* 2085172211Ssam * Update the HTINFO ie for a beacon frame. 2086172211Ssam */ 2087172211Ssamvoid 2088178354Ssamieee80211_ht_update_beacon(struct ieee80211vap *vap, 2089172211Ssam struct ieee80211_beacon_offsets *bo) 2090172211Ssam{ 2091172211Ssam#define PROTMODE (IEEE80211_HTINFO_OPMODE|IEEE80211_HTINFO_NONHT_PRESENT) 2092178354Ssam const struct ieee80211_channel *bsschan = vap->iv_bss->ni_chan; 2093178354Ssam struct ieee80211com *ic = vap->iv_ic; 2094172211Ssam struct ieee80211_ie_htinfo *ht = 2095172211Ssam (struct ieee80211_ie_htinfo *) bo->bo_htinfo; 2096172211Ssam 2097172211Ssam /* XXX only update on channel change */ 2098178354Ssam ht->hi_ctrlchannel = ieee80211_chan2ieee(ic, bsschan); 2099172211Ssam ht->hi_byte1 = IEEE80211_HTINFO_RIFSMODE_PROH; 2100178354Ssam if (IEEE80211_IS_CHAN_HT40U(bsschan)) 2101172211Ssam ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_ABOVE; 2102178354Ssam else if (IEEE80211_IS_CHAN_HT40D(bsschan)) 2103172211Ssam ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_BELOW; 2104172211Ssam else 2105172211Ssam ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_NONE; 2106178354Ssam if (IEEE80211_IS_CHAN_HT40(bsschan)) 2107172211Ssam ht->hi_byte1 |= IEEE80211_HTINFO_TXWIDTH_2040; 2108172211Ssam 2109172211Ssam /* protection mode */ 2110172211Ssam ht->hi_byte2 = (ht->hi_byte2 &~ PROTMODE) | ic->ic_curhtprotmode; 2111172211Ssam 2112172211Ssam /* XXX propagate to vendor ie's */ 2113172211Ssam#undef PROTMODE 2114172211Ssam} 2115172211Ssam 2116172211Ssam/* 2117170530Ssam * Add body of an HTINFO information element. 2118173273Ssam * 2119173273Ssam * NB: We don't use struct ieee80211_ie_htinfo because we can 2120173273Ssam * be called to fillin both a standard ie and a compat ie that 2121173273Ssam * has a vendor OUI at the front. 2122170530Ssam */ 2123170530Ssamstatic uint8_t * 2124170530Ssamieee80211_add_htinfo_body(uint8_t *frm, struct ieee80211_node *ni) 2125170530Ssam{ 2126170530Ssam struct ieee80211com *ic = ni->ni_ic; 2127170530Ssam 2128170530Ssam /* pre-zero remainder of ie */ 2129170530Ssam memset(frm, 0, sizeof(struct ieee80211_ie_htinfo) - 2); 2130170530Ssam 2131170530Ssam /* primary/control channel center */ 2132178354Ssam *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan); 2133170530Ssam 2134170530Ssam frm[0] = IEEE80211_HTINFO_RIFSMODE_PROH; 2135178354Ssam if (IEEE80211_IS_CHAN_HT40U(ni->ni_chan)) 2136170530Ssam frm[0] |= IEEE80211_HTINFO_2NDCHAN_ABOVE; 2137178354Ssam else if (IEEE80211_IS_CHAN_HT40D(ni->ni_chan)) 2138170530Ssam frm[0] |= IEEE80211_HTINFO_2NDCHAN_BELOW; 2139170530Ssam else 2140170530Ssam frm[0] |= IEEE80211_HTINFO_2NDCHAN_NONE; 2141178354Ssam if (IEEE80211_IS_CHAN_HT40(ni->ni_chan)) 2142170530Ssam frm[0] |= IEEE80211_HTINFO_TXWIDTH_2040; 2143170530Ssam 2144172211Ssam frm[1] = ic->ic_curhtprotmode; 2145170530Ssam 2146170530Ssam frm += 5; 2147170530Ssam 2148170530Ssam /* basic MCS set */ 2149170530Ssam ieee80211_set_basic_htrates(frm, &ni->ni_htrates); 2150170530Ssam frm += sizeof(struct ieee80211_ie_htinfo) - 2151170530Ssam __offsetof(struct ieee80211_ie_htinfo, hi_basicmcsset); 2152170530Ssam return frm; 2153170530Ssam} 2154170530Ssam 2155170530Ssam/* 2156170530Ssam * Add 802.11n HT information information element. 2157170530Ssam */ 2158170530Ssamuint8_t * 2159170530Ssamieee80211_add_htinfo(uint8_t *frm, struct ieee80211_node *ni) 2160170530Ssam{ 2161170530Ssam frm[0] = IEEE80211_ELEMID_HTINFO; 2162170530Ssam frm[1] = sizeof(struct ieee80211_ie_htinfo) - 2; 2163170530Ssam return ieee80211_add_htinfo_body(frm + 2, ni); 2164170530Ssam} 2165170530Ssam 2166170530Ssam/* 2167170530Ssam * Add Broadcom OUI wrapped standard HTINFO ie; this is 2168170530Ssam * used for compatibility w/ pre-draft implementations. 2169170530Ssam */ 2170170530Ssamuint8_t * 2171170530Ssamieee80211_add_htinfo_vendor(uint8_t *frm, struct ieee80211_node *ni) 2172170530Ssam{ 2173170530Ssam frm[0] = IEEE80211_ELEMID_VENDOR; 2174170530Ssam frm[1] = 4 + sizeof(struct ieee80211_ie_htinfo) - 2; 2175170530Ssam frm[2] = (BCM_OUI >> 0) & 0xff; 2176170530Ssam frm[3] = (BCM_OUI >> 8) & 0xff; 2177170530Ssam frm[4] = (BCM_OUI >> 16) & 0xff; 2178170530Ssam frm[5] = BCM_OUI_HTINFO; 2179170530Ssam return ieee80211_add_htinfo_body(frm + 6, ni); 2180170530Ssam} 2181