ieee80211_ht.c revision 183256
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 183256 2008-09-22 00:10:22Z 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 } 169183256Ssam /* enable RIFS if capable */ 170183256Ssam if (vap->iv_htcaps & IEEE80211_HTC_RIFS) 171183256Ssam vap->iv_flags_ext |= IEEE80211_FEXT_RIFS; 172183256Ssam 173170530Ssam /* NB: A-MPDU and A-MSDU rx are mandated, these are tx only */ 174178354Ssam vap->iv_flags_ext |= IEEE80211_FEXT_AMPDU_RX; 175178354Ssam if (vap->iv_htcaps & IEEE80211_HTC_AMPDU) 176178354Ssam vap->iv_flags_ext |= IEEE80211_FEXT_AMPDU_TX; 177178354Ssam vap->iv_flags_ext |= IEEE80211_FEXT_AMSDU_RX; 178178354Ssam if (vap->iv_htcaps & IEEE80211_HTC_AMSDU) 179178354Ssam vap->iv_flags_ext |= IEEE80211_FEXT_AMSDU_TX; 180170530Ssam } 181178354Ssam /* NB: disable default legacy WDS, too many issues right now */ 182178354Ssam if (vap->iv_flags_ext & IEEE80211_FEXT_WDSLEGACY) 183178354Ssam vap->iv_flags_ext &= ~IEEE80211_FEXT_HT; 184170530Ssam} 185170530Ssam 186170530Ssamvoid 187178354Ssamieee80211_ht_vdetach(struct ieee80211vap *vap) 188170530Ssam{ 189170530Ssam} 190170530Ssam 191170530Ssamstatic void 192170530Ssamht_announce(struct ieee80211com *ic, int mode, 193170530Ssam const struct ieee80211_htrateset *rs) 194170530Ssam{ 195170530Ssam struct ifnet *ifp = ic->ic_ifp; 196170530Ssam int i, rate, mword; 197170530Ssam 198170530Ssam if_printf(ifp, "%s MCS: ", ieee80211_phymode_name[mode]); 199170530Ssam for (i = 0; i < rs->rs_nrates; i++) { 200172226Ssam mword = ieee80211_rate2media(ic, 201172226Ssam rs->rs_rates[i] | IEEE80211_RATE_MCS, mode); 202170530Ssam if (IFM_SUBTYPE(mword) != IFM_IEEE80211_MCS) 203170530Ssam continue; 204178354Ssam rate = ieee80211_htrates[rs->rs_rates[i]].ht40_rate_400ns; 205170530Ssam printf("%s%d%sMbps", (i != 0 ? " " : ""), 206170530Ssam rate / 2, ((rate & 0x1) != 0 ? ".5" : "")); 207170530Ssam } 208170530Ssam printf("\n"); 209170530Ssam} 210170530Ssam 211170530Ssamvoid 212170530Ssamieee80211_ht_announce(struct ieee80211com *ic) 213170530Ssam{ 214170530Ssam if (isset(ic->ic_modecaps, IEEE80211_MODE_11NA)) 215170530Ssam ht_announce(ic, IEEE80211_MODE_11NA, &ieee80211_rateset_11n); 216170530Ssam if (isset(ic->ic_modecaps, IEEE80211_MODE_11NG)) 217170530Ssam ht_announce(ic, IEEE80211_MODE_11NG, &ieee80211_rateset_11n); 218170530Ssam} 219170530Ssam 220170530Ssamconst struct ieee80211_htrateset * 221170530Ssamieee80211_get_suphtrates(struct ieee80211com *ic, 222170530Ssam const struct ieee80211_channel *c) 223170530Ssam{ 224173273Ssam return &ieee80211_rateset_11n; 225170530Ssam} 226170530Ssam 227170530Ssam/* 228170530Ssam * Receive processing. 229170530Ssam */ 230170530Ssam 231170530Ssam/* 232170530Ssam * Decap the encapsulated A-MSDU frames and dispatch all but 233170530Ssam * the last for delivery. The last frame is returned for 234170530Ssam * delivery via the normal path. 235170530Ssam */ 236170530Ssamstruct mbuf * 237170530Ssamieee80211_decap_amsdu(struct ieee80211_node *ni, struct mbuf *m) 238170530Ssam{ 239178354Ssam struct ieee80211vap *vap = ni->ni_vap; 240173462Ssam int framelen; 241170530Ssam struct mbuf *n; 242170530Ssam 243170530Ssam /* discard 802.3 header inserted by ieee80211_decap */ 244170530Ssam m_adj(m, sizeof(struct ether_header)); 245170530Ssam 246178354Ssam vap->iv_stats.is_amsdu_decap++; 247170530Ssam 248170530Ssam for (;;) { 249170530Ssam /* 250170530Ssam * Decap the first frame, bust it apart from the 251170530Ssam * remainder and deliver. We leave the last frame 252170530Ssam * delivery to the caller (for consistency with other 253170530Ssam * code paths, could also do it here). 254170530Ssam */ 255170530Ssam m = ieee80211_decap1(m, &framelen); 256170530Ssam if (m == NULL) { 257178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 258173462Ssam ni->ni_macaddr, "a-msdu", "%s", "decap failed"); 259178354Ssam vap->iv_stats.is_amsdu_tooshort++; 260170530Ssam return NULL; 261170530Ssam } 262173462Ssam if (m->m_pkthdr.len == framelen) 263170530Ssam break; 264170530Ssam n = m_split(m, framelen, M_NOWAIT); 265170530Ssam if (n == NULL) { 266178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 267170530Ssam ni->ni_macaddr, "a-msdu", 268170530Ssam "%s", "unable to split encapsulated frames"); 269178354Ssam vap->iv_stats.is_amsdu_split++; 270170530Ssam m_freem(m); /* NB: must reclaim */ 271170530Ssam return NULL; 272170530Ssam } 273178354Ssam vap->iv_deliver_data(vap, ni, m); 274170530Ssam 275170530Ssam /* 276170530Ssam * Remove frame contents; each intermediate frame 277170530Ssam * is required to be aligned to a 4-byte boundary. 278170530Ssam */ 279170530Ssam m = n; 280170530Ssam m_adj(m, roundup2(framelen, 4) - framelen); /* padding */ 281170530Ssam } 282170530Ssam return m; /* last delivered by caller */ 283170530Ssam} 284170530Ssam 285170530Ssam/* 286170530Ssam * Purge all frames in the A-MPDU re-order queue. 287170530Ssam */ 288170530Ssamstatic void 289170530Ssamampdu_rx_purge(struct ieee80211_rx_ampdu *rap) 290170530Ssam{ 291170530Ssam struct mbuf *m; 292170530Ssam int i; 293170530Ssam 294170530Ssam for (i = 0; i < rap->rxa_wnd; i++) { 295170530Ssam m = rap->rxa_m[i]; 296170530Ssam if (m != NULL) { 297170530Ssam rap->rxa_m[i] = NULL; 298170530Ssam rap->rxa_qbytes -= m->m_pkthdr.len; 299170530Ssam m_freem(m); 300170530Ssam if (--rap->rxa_qframes == 0) 301170530Ssam break; 302170530Ssam } 303170530Ssam } 304170530Ssam KASSERT(rap->rxa_qbytes == 0 && rap->rxa_qframes == 0, 305170530Ssam ("lost %u data, %u frames on ampdu rx q", 306170530Ssam rap->rxa_qbytes, rap->rxa_qframes)); 307170530Ssam} 308170530Ssam 309170530Ssam/* 310178354Ssam * Start A-MPDU rx/re-order processing for the specified TID. 311178354Ssam */ 312178354Ssamstatic void 313178354Ssamampdu_rx_start(struct ieee80211_rx_ampdu *rap, int bufsiz, int start) 314178354Ssam{ 315178354Ssam if (rap->rxa_flags & IEEE80211_AGGR_RUNNING) { 316178354Ssam /* 317178354Ssam * AMPDU previously setup and not terminated with a DELBA, 318178354Ssam * flush the reorder q's in case anything remains. 319178354Ssam */ 320178354Ssam ampdu_rx_purge(rap); 321178354Ssam } 322178354Ssam memset(rap, 0, sizeof(*rap)); 323178354Ssam rap->rxa_wnd = (bufsiz == 0) ? 324178354Ssam IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX); 325178354Ssam rap->rxa_start = start; 326178354Ssam rap->rxa_flags |= IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_XCHGPEND; 327178354Ssam} 328178354Ssam 329178354Ssam/* 330170530Ssam * Stop A-MPDU rx processing for the specified TID. 331170530Ssam */ 332170530Ssamstatic void 333170530Ssamampdu_rx_stop(struct ieee80211_rx_ampdu *rap) 334170530Ssam{ 335170530Ssam ampdu_rx_purge(rap); 336178354Ssam rap->rxa_flags &= ~(IEEE80211_AGGR_RUNNING | IEEE80211_AGGR_XCHGPEND); 337170530Ssam} 338170530Ssam 339170530Ssam/* 340170530Ssam * Dispatch a frame from the A-MPDU reorder queue. The 341170530Ssam * frame is fed back into ieee80211_input marked with an 342183247Ssam * M_AMPDU_MPDU flag so it doesn't come back to us (it also 343170530Ssam * permits ieee80211_input to optimize re-processing). 344170530Ssam */ 345170530Ssamstatic __inline void 346170530Ssamampdu_dispatch(struct ieee80211_node *ni, struct mbuf *m) 347170530Ssam{ 348183247Ssam m->m_flags |= M_AMPDU_MPDU; /* bypass normal processing */ 349183247Ssam /* NB: rssi, noise, and rstamp are ignored w/ M_AMPDU_MPDU set */ 350178354Ssam (void) ieee80211_input(ni, m, 0, 0, 0); 351170530Ssam} 352170530Ssam 353170530Ssam/* 354170530Ssam * Dispatch as many frames as possible from the re-order queue. 355170530Ssam * Frames will always be "at the front"; we process all frames 356170530Ssam * up to the first empty slot in the window. On completion we 357170530Ssam * cleanup state if there are still pending frames in the current 358170530Ssam * BA window. We assume the frame at slot 0 is already handled 359170530Ssam * by the caller; we always start at slot 1. 360170530Ssam */ 361170530Ssamstatic void 362170530Ssamampdu_rx_dispatch(struct ieee80211_rx_ampdu *rap, struct ieee80211_node *ni) 363170530Ssam{ 364178354Ssam struct ieee80211vap *vap = ni->ni_vap; 365170530Ssam struct mbuf *m; 366170530Ssam int i; 367170530Ssam 368170530Ssam /* flush run of frames */ 369170530Ssam for (i = 1; i < rap->rxa_wnd; i++) { 370170530Ssam m = rap->rxa_m[i]; 371170530Ssam if (m == NULL) 372170530Ssam break; 373170530Ssam rap->rxa_m[i] = NULL; 374170530Ssam rap->rxa_qbytes -= m->m_pkthdr.len; 375170530Ssam rap->rxa_qframes--; 376170530Ssam 377170530Ssam ampdu_dispatch(ni, m); 378170530Ssam } 379170530Ssam /* 380170530Ssam * If frames remain, copy the mbuf pointers down so 381170530Ssam * they correspond to the offsets in the new window. 382170530Ssam */ 383170530Ssam if (rap->rxa_qframes != 0) { 384170530Ssam int n = rap->rxa_qframes, j; 385170530Ssam for (j = i+1; j < rap->rxa_wnd; j++) { 386170530Ssam if (rap->rxa_m[j] != NULL) { 387170530Ssam rap->rxa_m[j-i] = rap->rxa_m[j]; 388170530Ssam rap->rxa_m[j] = NULL; 389170530Ssam if (--n == 0) 390170530Ssam break; 391170530Ssam } 392170530Ssam } 393170530Ssam KASSERT(n == 0, ("lost %d frames", n)); 394178354Ssam vap->iv_stats.is_ampdu_rx_copy += rap->rxa_qframes; 395170530Ssam } 396173273Ssam /* 397173273Ssam * Adjust the start of the BA window to 398173273Ssam * reflect the frames just dispatched. 399173273Ssam */ 400173273Ssam rap->rxa_start = IEEE80211_SEQ_ADD(rap->rxa_start, i); 401178354Ssam vap->iv_stats.is_ampdu_rx_oor += i; 402170530Ssam} 403170530Ssam 404173273Ssam#ifdef IEEE80211_AMPDU_AGE 405170530Ssam/* 406173273Ssam * Dispatch all frames in the A-MPDU re-order queue. 407170530Ssam */ 408170530Ssamstatic void 409173273Ssamampdu_rx_flush(struct ieee80211_node *ni, struct ieee80211_rx_ampdu *rap) 410170530Ssam{ 411178354Ssam struct ieee80211vap *vap = ni->ni_vap; 412170530Ssam struct mbuf *m; 413170530Ssam int i; 414170530Ssam 415173273Ssam for (i = 0; i < rap->rxa_wnd; i++) { 416170530Ssam m = rap->rxa_m[i]; 417170530Ssam if (m == NULL) 418170530Ssam continue; 419170530Ssam rap->rxa_m[i] = NULL; 420170530Ssam rap->rxa_qbytes -= m->m_pkthdr.len; 421173273Ssam rap->rxa_qframes--; 422178354Ssam vap->iv_stats.is_ampdu_rx_oor++; 423173273Ssam 424170530Ssam ampdu_dispatch(ni, m); 425173273Ssam if (rap->rxa_qframes == 0) 426170530Ssam break; 427170530Ssam } 428170530Ssam} 429173273Ssam#endif /* IEEE80211_AMPDU_AGE */ 430170530Ssam 431170530Ssam/* 432173273Ssam * Dispatch all frames in the A-MPDU re-order queue 433173273Ssam * preceding the specified sequence number. This logic 434173273Ssam * handles window moves due to a received MSDU or BAR. 435173273Ssam */ 436173273Ssamstatic void 437173273Ssamampdu_rx_flush_upto(struct ieee80211_node *ni, 438173273Ssam struct ieee80211_rx_ampdu *rap, ieee80211_seq winstart) 439173273Ssam{ 440178354Ssam struct ieee80211vap *vap = ni->ni_vap; 441173273Ssam struct mbuf *m; 442173273Ssam ieee80211_seq seqno; 443173273Ssam int i; 444173273Ssam 445173273Ssam /* 446173273Ssam * Flush any complete MSDU's with a sequence number lower 447173273Ssam * than winstart. Gaps may exist. Note that we may actually 448173273Ssam * dispatch frames past winstart if a run continues; this is 449173273Ssam * an optimization that avoids having to do a separate pass 450173273Ssam * to dispatch frames after moving the BA window start. 451173273Ssam */ 452173273Ssam seqno = rap->rxa_start; 453173273Ssam for (i = 0; i < rap->rxa_wnd; i++) { 454173273Ssam m = rap->rxa_m[i]; 455173273Ssam if (m != NULL) { 456173273Ssam rap->rxa_m[i] = NULL; 457173273Ssam rap->rxa_qbytes -= m->m_pkthdr.len; 458173273Ssam rap->rxa_qframes--; 459178354Ssam vap->iv_stats.is_ampdu_rx_oor++; 460173273Ssam 461173273Ssam ampdu_dispatch(ni, m); 462173273Ssam } else { 463173273Ssam if (!IEEE80211_SEQ_BA_BEFORE(seqno, winstart)) 464173273Ssam break; 465173273Ssam } 466173273Ssam seqno = IEEE80211_SEQ_INC(seqno); 467173273Ssam } 468173273Ssam /* 469173273Ssam * If frames remain, copy the mbuf pointers down so 470173273Ssam * they correspond to the offsets in the new window. 471173273Ssam */ 472173273Ssam if (rap->rxa_qframes != 0) { 473173273Ssam int n = rap->rxa_qframes, j; 474178354Ssam 475178354Ssam /* NB: this loop assumes i > 0 and/or rxa_m[0] is NULL */ 476178354Ssam KASSERT(rap->rxa_m[0] == NULL, 477178354Ssam ("%s: BA window slot 0 occupied", __func__)); 478173273Ssam for (j = i+1; j < rap->rxa_wnd; j++) { 479173273Ssam if (rap->rxa_m[j] != NULL) { 480173273Ssam rap->rxa_m[j-i] = rap->rxa_m[j]; 481173273Ssam rap->rxa_m[j] = NULL; 482173273Ssam if (--n == 0) 483173273Ssam break; 484173273Ssam } 485173273Ssam } 486173273Ssam KASSERT(n == 0, ("%s: lost %d frames, qframes %d off %d " 487173273Ssam "BA win <%d:%d> winstart %d", 488173273Ssam __func__, n, rap->rxa_qframes, i, rap->rxa_start, 489173273Ssam IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 490173273Ssam winstart)); 491178354Ssam vap->iv_stats.is_ampdu_rx_copy += rap->rxa_qframes; 492173273Ssam } 493173273Ssam /* 494173273Ssam * Move the start of the BA window; we use the 495173273Ssam * sequence number of the last MSDU that was 496173273Ssam * passed up the stack+1 or winstart if stopped on 497173273Ssam * a gap in the reorder buffer. 498173273Ssam */ 499173273Ssam rap->rxa_start = seqno; 500173273Ssam} 501173273Ssam 502173273Ssam/* 503170530Ssam * Process a received QoS data frame for an HT station. Handle 504170530Ssam * A-MPDU reordering: if this frame is received out of order 505170530Ssam * and falls within the BA window hold onto it. Otherwise if 506173273Ssam * this frame completes a run, flush any pending frames. We 507170530Ssam * return 1 if the frame is consumed. A 0 is returned if 508170530Ssam * the frame should be processed normally by the caller. 509170530Ssam */ 510170530Ssamint 511170530Ssamieee80211_ampdu_reorder(struct ieee80211_node *ni, struct mbuf *m) 512170530Ssam{ 513170530Ssam#define IEEE80211_FC0_QOSDATA \ 514170530Ssam (IEEE80211_FC0_TYPE_DATA|IEEE80211_FC0_SUBTYPE_QOS|IEEE80211_FC0_VERSION_0) 515173273Ssam#define PROCESS 0 /* caller should process frame */ 516173273Ssam#define CONSUMED 1 /* frame consumed, caller does nothing */ 517178354Ssam struct ieee80211vap *vap = ni->ni_vap; 518170530Ssam struct ieee80211_qosframe *wh; 519170530Ssam struct ieee80211_rx_ampdu *rap; 520170530Ssam ieee80211_seq rxseq; 521170530Ssam uint8_t tid; 522170530Ssam int off; 523170530Ssam 524183247Ssam KASSERT((m->m_flags & (M_AMPDU | M_AMPDU_MPDU)) == M_AMPDU, 525183247Ssam ("!a-mpdu or already re-ordered, flags 0x%x", m->m_flags)); 526170530Ssam KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT sta")); 527170530Ssam 528170530Ssam /* NB: m_len known to be sufficient */ 529170530Ssam wh = mtod(m, struct ieee80211_qosframe *); 530183247Ssam if (wh->i_fc[0] != IEEE80211_FC0_QOSDATA) { 531183247Ssam /* 532183247Ssam * Not QoS data, shouldn't get here but just 533183247Ssam * return it to the caller for processing. 534183247Ssam */ 535183247Ssam return PROCESS; 536183247Ssam } 537170530Ssam 538173273Ssam if ((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS) 539173273Ssam tid = ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0]; 540173273Ssam else 541173273Ssam tid = wh->i_qos[0]; 542173273Ssam tid &= IEEE80211_QOS_TID; 543170530Ssam rap = &ni->ni_rx_ampdu[tid]; 544170530Ssam if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) { 545170530Ssam /* 546170530Ssam * No ADDBA request yet, don't touch. 547170530Ssam */ 548173273Ssam return PROCESS; 549170530Ssam } 550182827Ssam rxseq = le16toh(*(uint16_t *)wh->i_seq); 551182827Ssam if ((rxseq & IEEE80211_SEQ_FRAG_MASK) != 0) { 552182827Ssam /* 553182827Ssam * Fragments are not allowed; toss. 554182827Ssam */ 555182827Ssam IEEE80211_DISCARD_MAC(vap, 556182827Ssam IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr, 557182827Ssam "A-MPDU", "fragment, rxseq 0x%x tid %u%s", rxseq, tid, 558182827Ssam wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : ""); 559182827Ssam vap->iv_stats.is_ampdu_rx_drop++; 560182827Ssam IEEE80211_NODE_STAT(ni, rx_drop); 561182827Ssam m_freem(m); 562182827Ssam return CONSUMED; 563182827Ssam } 564182827Ssam rxseq >>= IEEE80211_SEQ_SEQ_SHIFT; 565173273Ssam rap->rxa_nframes++; 566173273Ssamagain: 567170530Ssam if (rxseq == rap->rxa_start) { 568170530Ssam /* 569170530Ssam * First frame in window. 570170530Ssam */ 571170530Ssam if (rap->rxa_qframes != 0) { 572170530Ssam /* 573170530Ssam * Dispatch as many packets as we can. 574170530Ssam */ 575170530Ssam KASSERT(rap->rxa_m[0] == NULL, ("unexpected dup")); 576170530Ssam ampdu_dispatch(ni, m); 577170530Ssam ampdu_rx_dispatch(rap, ni); 578173273Ssam return CONSUMED; 579170530Ssam } else { 580170530Ssam /* 581170530Ssam * In order; advance window and notify 582170530Ssam * caller to dispatch directly. 583170530Ssam */ 584170530Ssam rap->rxa_start = IEEE80211_SEQ_INC(rxseq); 585173273Ssam return PROCESS; 586170530Ssam } 587170530Ssam } 588170530Ssam /* 589173273Ssam * Frame is out of order; store if in the BA window. 590170530Ssam */ 591170530Ssam /* calculate offset in BA window */ 592170530Ssam off = IEEE80211_SEQ_SUB(rxseq, rap->rxa_start); 593173273Ssam if (off < rap->rxa_wnd) { 594170530Ssam /* 595173273Ssam * Common case (hopefully): in the BA window. 596173273Ssam * Sec 9.10.7.6 a) (D2.04 p.118 line 47) 597173273Ssam */ 598173273Ssam#ifdef IEEE80211_AMPDU_AGE 599173273Ssam /* 600173273Ssam * Check for frames sitting too long in the reorder queue. 601173273Ssam * This should only ever happen if frames are not delivered 602173273Ssam * without the sender otherwise notifying us (e.g. with a 603173273Ssam * BAR to move the window). Typically this happens because 604173273Ssam * of vendor bugs that cause the sequence number to jump. 605173273Ssam * When this happens we get a gap in the reorder queue that 606173273Ssam * leaves frame sitting on the queue until they get pushed 607173273Ssam * out due to window moves. When the vendor does not send 608173273Ssam * BAR this move only happens due to explicit packet sends 609170530Ssam * 610173273Ssam * NB: we only track the time of the oldest frame in the 611173273Ssam * reorder q; this means that if we flush we might push 612173273Ssam * frames that still "new"; if this happens then subsequent 613173273Ssam * frames will result in BA window moves which cost something 614173273Ssam * but is still better than a big throughput dip. 615170530Ssam */ 616173273Ssam if (rap->rxa_qframes != 0) { 617173273Ssam /* XXX honor batimeout? */ 618173273Ssam if (ticks - rap->rxa_age > ieee80211_ampdu_age) { 619173273Ssam /* 620173273Ssam * Too long since we received the first 621173273Ssam * frame; flush the reorder buffer. 622173273Ssam */ 623173273Ssam if (rap->rxa_qframes != 0) { 624178354Ssam vap->iv_stats.is_ampdu_rx_age += 625173273Ssam rap->rxa_qframes; 626173273Ssam ampdu_rx_flush(ni, rap); 627173273Ssam } 628173273Ssam rap->rxa_start = IEEE80211_SEQ_INC(rxseq); 629173273Ssam return PROCESS; 630173273Ssam } 631173273Ssam } else { 632173273Ssam /* 633173273Ssam * First frame, start aging timer. 634173273Ssam */ 635173273Ssam rap->rxa_age = ticks; 636173273Ssam } 637173273Ssam#endif /* IEEE80211_AMPDU_AGE */ 638173273Ssam /* save packet */ 639173273Ssam if (rap->rxa_m[off] == NULL) { 640173273Ssam rap->rxa_m[off] = m; 641173273Ssam rap->rxa_qframes++; 642173273Ssam rap->rxa_qbytes += m->m_pkthdr.len; 643178354Ssam vap->iv_stats.is_ampdu_rx_reorder++; 644173273Ssam } else { 645178354Ssam IEEE80211_DISCARD_MAC(vap, 646173273Ssam IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, 647173273Ssam ni->ni_macaddr, "a-mpdu duplicate", 648173273Ssam "seqno %u tid %u BA win <%u:%u>", 649173273Ssam rxseq, tid, rap->rxa_start, 650173273Ssam IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1)); 651178354Ssam vap->iv_stats.is_rx_dup++; 652173273Ssam IEEE80211_NODE_STAT(ni, rx_dup); 653173273Ssam m_freem(m); 654173273Ssam } 655173273Ssam return CONSUMED; 656173273Ssam } 657173273Ssam if (off < IEEE80211_SEQ_BA_RANGE) { 658173273Ssam /* 659173273Ssam * Outside the BA window, but within range; 660173273Ssam * flush the reorder q and move the window. 661173273Ssam * Sec 9.10.7.6 b) (D2.04 p.118 line 60) 662173273Ssam */ 663178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni, 664173273Ssam "move BA win <%u:%u> (%u frames) rxseq %u tid %u", 665170530Ssam rap->rxa_start, 666173273Ssam IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 667170530Ssam rap->rxa_qframes, rxseq, tid); 668178354Ssam vap->iv_stats.is_ampdu_rx_move++; 669170530Ssam 670173273Ssam /* 671173273Ssam * The spec says to flush frames up to but not including: 672173273Ssam * WinStart_B = rxseq - rap->rxa_wnd + 1 673173273Ssam * Then insert the frame or notify the caller to process 674173273Ssam * it immediately. We can safely do this by just starting 675173273Ssam * over again because we know the frame will now be within 676173273Ssam * the BA window. 677173273Ssam */ 678173273Ssam /* NB: rxa_wnd known to be >0 */ 679173273Ssam ampdu_rx_flush_upto(ni, rap, 680173273Ssam IEEE80211_SEQ_SUB(rxseq, rap->rxa_wnd-1)); 681173273Ssam goto again; 682170530Ssam } else { 683170530Ssam /* 684173273Ssam * Outside the BA window and out of range; toss. 685173273Ssam * Sec 9.10.7.6 c) (D2.04 p.119 line 16) 686170530Ssam */ 687178354Ssam IEEE80211_DISCARD_MAC(vap, 688173273Ssam IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr, 689178354Ssam "MPDU", "BA win <%u:%u> (%u frames) rxseq %u tid %u%s", 690173273Ssam rap->rxa_start, 691173273Ssam IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 692173273Ssam rap->rxa_qframes, rxseq, tid, 693173273Ssam wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : ""); 694178354Ssam vap->iv_stats.is_ampdu_rx_drop++; 695173273Ssam IEEE80211_NODE_STAT(ni, rx_drop); 696170530Ssam m_freem(m); 697173273Ssam return CONSUMED; 698170530Ssam } 699173273Ssam#undef CONSUMED 700173273Ssam#undef PROCESS 701170530Ssam#undef IEEE80211_FC0_QOSDATA 702170530Ssam} 703170530Ssam 704170530Ssam/* 705170530Ssam * Process a BAR ctl frame. Dispatch all frames up to 706170530Ssam * the sequence number of the frame. If this frame is 707173273Ssam * out of range it's discarded. 708170530Ssam */ 709170530Ssamvoid 710170530Ssamieee80211_recv_bar(struct ieee80211_node *ni, struct mbuf *m0) 711170530Ssam{ 712178354Ssam struct ieee80211vap *vap = ni->ni_vap; 713170530Ssam struct ieee80211_frame_bar *wh; 714170530Ssam struct ieee80211_rx_ampdu *rap; 715170530Ssam ieee80211_seq rxseq; 716170530Ssam int tid, off; 717170530Ssam 718173273Ssam if (!ieee80211_recv_bar_ena) { 719173273Ssam#if 0 720178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_11N, 721173273Ssam ni->ni_macaddr, "BAR", "%s", "processing disabled"); 722173273Ssam#endif 723178354Ssam vap->iv_stats.is_ampdu_bar_bad++; 724173273Ssam return; 725173273Ssam } 726170530Ssam wh = mtod(m0, struct ieee80211_frame_bar *); 727170530Ssam /* XXX check basic BAR */ 728170530Ssam tid = MS(le16toh(wh->i_ctl), IEEE80211_BAR_TID); 729170530Ssam rap = &ni->ni_rx_ampdu[tid]; 730170530Ssam if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) { 731170530Ssam /* 732170530Ssam * No ADDBA request yet, don't touch. 733170530Ssam */ 734178354Ssam IEEE80211_DISCARD_MAC(vap, 735170530Ssam IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, 736170530Ssam ni->ni_macaddr, "BAR", "no BA stream, tid %u", tid); 737178354Ssam vap->iv_stats.is_ampdu_bar_bad++; 738170530Ssam return; 739170530Ssam } 740178354Ssam vap->iv_stats.is_ampdu_bar_rx++; 741170530Ssam rxseq = le16toh(wh->i_seq) >> IEEE80211_SEQ_SEQ_SHIFT; 742173273Ssam if (rxseq == rap->rxa_start) 743173273Ssam return; 744170530Ssam /* calculate offset in BA window */ 745170530Ssam off = IEEE80211_SEQ_SUB(rxseq, rap->rxa_start); 746173273Ssam if (off < IEEE80211_SEQ_BA_RANGE) { 747170530Ssam /* 748173273Ssam * Flush the reorder q up to rxseq and move the window. 749173273Ssam * Sec 9.10.7.6 a) (D2.04 p.119 line 22) 750170530Ssam */ 751178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni, 752173273Ssam "BAR moves BA win <%u:%u> (%u frames) rxseq %u tid %u", 753170530Ssam rap->rxa_start, 754173273Ssam IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 755173273Ssam rap->rxa_qframes, rxseq, tid); 756178354Ssam vap->iv_stats.is_ampdu_bar_move++; 757173273Ssam 758173273Ssam ampdu_rx_flush_upto(ni, rap, rxseq); 759173273Ssam if (off >= rap->rxa_wnd) { 760173273Ssam /* 761173273Ssam * BAR specifies a window start to the right of BA 762173273Ssam * window; we must move it explicitly since 763173273Ssam * ampdu_rx_flush_upto will not. 764173273Ssam */ 765173273Ssam rap->rxa_start = rxseq; 766170530Ssam } 767173273Ssam } else { 768170530Ssam /* 769173273Ssam * Out of range; toss. 770173273Ssam * Sec 9.10.7.6 b) (D2.04 p.119 line 41) 771170530Ssam */ 772178354Ssam IEEE80211_DISCARD_MAC(vap, 773173273Ssam IEEE80211_MSG_INPUT | IEEE80211_MSG_11N, ni->ni_macaddr, 774173273Ssam "BAR", "BA win <%u:%u> (%u frames) rxseq %u tid %u%s", 775173273Ssam rap->rxa_start, 776173273Ssam IEEE80211_SEQ_ADD(rap->rxa_start, rap->rxa_wnd-1), 777173273Ssam rap->rxa_qframes, rxseq, tid, 778173273Ssam wh->i_fc[1] & IEEE80211_FC1_RETRY ? " (retransmit)" : ""); 779178354Ssam vap->iv_stats.is_ampdu_bar_oow++; 780173273Ssam IEEE80211_NODE_STAT(ni, rx_drop); 781170530Ssam } 782170530Ssam} 783170530Ssam 784170530Ssam/* 785170530Ssam * Setup HT-specific state in a node. Called only 786170530Ssam * when HT use is negotiated so we don't do extra 787170530Ssam * work for temporary and/or legacy sta's. 788170530Ssam */ 789170530Ssamvoid 790183254Ssamieee80211_ht_node_init(struct ieee80211_node *ni) 791170530Ssam{ 792170530Ssam struct ieee80211_tx_ampdu *tap; 793170530Ssam int ac; 794170530Ssam 795173273Ssam if (ni->ni_flags & IEEE80211_NODE_HT) { 796173273Ssam /* 797173273Ssam * Clean AMPDU state on re-associate. This handles the case 798173273Ssam * where a station leaves w/o notifying us and then returns 799173273Ssam * before node is reaped for inactivity. 800173273Ssam */ 801173273Ssam ieee80211_ht_node_cleanup(ni); 802173273Ssam } 803170530Ssam for (ac = 0; ac < WME_NUM_AC; ac++) { 804170530Ssam tap = &ni->ni_tx_ampdu[ac]; 805170530Ssam tap->txa_ac = ac; 806173273Ssam /* NB: further initialization deferred */ 807170530Ssam } 808173273Ssam ni->ni_flags |= IEEE80211_NODE_HT | IEEE80211_NODE_AMPDU; 809170530Ssam} 810170530Ssam 811170530Ssam/* 812170530Ssam * Cleanup HT-specific state in a node. Called only 813170530Ssam * when HT use has been marked. 814170530Ssam */ 815170530Ssamvoid 816170530Ssamieee80211_ht_node_cleanup(struct ieee80211_node *ni) 817170530Ssam{ 818170530Ssam struct ieee80211com *ic = ni->ni_ic; 819170530Ssam int i; 820170530Ssam 821170530Ssam KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT node")); 822170530Ssam 823170530Ssam /* XXX optimize this */ 824170530Ssam for (i = 0; i < WME_NUM_AC; i++) { 825170530Ssam struct ieee80211_tx_ampdu *tap = &ni->ni_tx_ampdu[i]; 826173273Ssam if (tap->txa_flags & IEEE80211_AGGR_SETUP) { 827173273Ssam /* 828173273Ssam * Stop BA stream if setup so driver has a chance 829173273Ssam * to reclaim any resources it might have allocated. 830173273Ssam */ 831170530Ssam ic->ic_addba_stop(ni, &ni->ni_tx_ampdu[i]); 832178354Ssam tap->txa_lastsample = 0; 833178354Ssam tap->txa_avgpps = 0; 834173273Ssam /* NB: clearing NAK means we may re-send ADDBA */ 835173273Ssam tap->txa_flags &= 836173273Ssam ~(IEEE80211_AGGR_SETUP | IEEE80211_AGGR_NAK); 837173273Ssam } 838170530Ssam } 839170530Ssam for (i = 0; i < WME_NUM_TID; i++) 840170530Ssam ampdu_rx_stop(&ni->ni_rx_ampdu[i]); 841170530Ssam 842170530Ssam ni->ni_htcap = 0; 843182828Ssam ni->ni_flags &= ~IEEE80211_NODE_HT_ALL; 844170530Ssam} 845170530Ssam 846178354Ssam/* 847178354Ssam * Age out HT resources for a station. 848178354Ssam */ 849178354Ssamvoid 850178354Ssamieee80211_ht_node_age(struct ieee80211_node *ni) 851178354Ssam{ 852178354Ssam#ifdef IEEE80211_AMPDU_AGE 853178354Ssam struct ieee80211vap *vap = ni->ni_vap; 854178354Ssam uint8_t tid; 855178354Ssam#endif 856178354Ssam 857178354Ssam KASSERT(ni->ni_flags & IEEE80211_NODE_HT, ("not an HT sta")); 858178354Ssam 859178354Ssam#ifdef IEEE80211_AMPDU_AGE 860178354Ssam for (tid = 0; tid < WME_NUM_TID; tid++) { 861178354Ssam struct ieee80211_rx_ampdu *rap; 862178354Ssam 863178354Ssam rap = &ni->ni_rx_ampdu[tid]; 864178354Ssam if ((rap->rxa_flags & IEEE80211_AGGR_XCHGPEND) == 0) 865178354Ssam continue; 866178354Ssam if (rap->rxa_qframes == 0) 867178354Ssam continue; 868178354Ssam /* 869178354Ssam * Check for frames sitting too long in the reorder queue. 870178354Ssam * See above for more details on what's happening here. 871178354Ssam */ 872178354Ssam /* XXX honor batimeout? */ 873178354Ssam if (ticks - rap->rxa_age > ieee80211_ampdu_age) { 874178354Ssam /* 875178354Ssam * Too long since we received the first 876178354Ssam * frame; flush the reorder buffer. 877178354Ssam */ 878178354Ssam vap->iv_stats.is_ampdu_rx_age += rap->rxa_qframes; 879178354Ssam ampdu_rx_flush(ni, rap); 880178354Ssam } 881178354Ssam } 882178354Ssam#endif /* IEEE80211_AMPDU_AGE */ 883178354Ssam} 884178354Ssam 885173273Ssamstatic struct ieee80211_channel * 886173273Ssamfindhtchan(struct ieee80211com *ic, struct ieee80211_channel *c, int htflags) 887173273Ssam{ 888173273Ssam return ieee80211_find_channel(ic, c->ic_freq, 889173273Ssam (c->ic_flags &~ IEEE80211_CHAN_HT) | htflags); 890173273Ssam} 891173273Ssam 892173273Ssam/* 893173273Ssam * Adjust a channel to be HT/non-HT according to the vap's configuration. 894173273Ssam */ 895173273Ssamstruct ieee80211_channel * 896173273Ssamieee80211_ht_adjust_channel(struct ieee80211com *ic, 897173273Ssam struct ieee80211_channel *chan, int flags) 898173273Ssam{ 899173273Ssam struct ieee80211_channel *c; 900173273Ssam 901173273Ssam if (flags & IEEE80211_FEXT_HT) { 902173273Ssam /* promote to HT if possible */ 903173273Ssam if (flags & IEEE80211_FEXT_USEHT40) { 904173273Ssam if (!IEEE80211_IS_CHAN_HT40(chan)) { 905173273Ssam /* NB: arbitrarily pick ht40+ over ht40- */ 906173273Ssam c = findhtchan(ic, chan, IEEE80211_CHAN_HT40U); 907173273Ssam if (c == NULL) 908173273Ssam c = findhtchan(ic, chan, 909173273Ssam IEEE80211_CHAN_HT40D); 910173273Ssam if (c == NULL) 911173273Ssam c = findhtchan(ic, chan, 912173273Ssam IEEE80211_CHAN_HT20); 913173273Ssam if (c != NULL) 914173273Ssam chan = c; 915173273Ssam } 916173273Ssam } else if (!IEEE80211_IS_CHAN_HT20(chan)) { 917173273Ssam c = findhtchan(ic, chan, IEEE80211_CHAN_HT20); 918173273Ssam if (c != NULL) 919173273Ssam chan = c; 920173273Ssam } 921173273Ssam } else if (IEEE80211_IS_CHAN_HT(chan)) { 922173273Ssam /* demote to legacy, HT use is disabled */ 923173273Ssam c = ieee80211_find_channel(ic, chan->ic_freq, 924173273Ssam chan->ic_flags &~ IEEE80211_CHAN_HT); 925173273Ssam if (c != NULL) 926173273Ssam chan = c; 927173273Ssam } 928173273Ssam return chan; 929173273Ssam} 930173273Ssam 931173273Ssam/* 932173273Ssam * Setup HT-specific state for a legacy WDS peer. 933173273Ssam */ 934173273Ssamvoid 935173273Ssamieee80211_ht_wds_init(struct ieee80211_node *ni) 936173273Ssam{ 937178354Ssam struct ieee80211vap *vap = ni->ni_vap; 938173273Ssam struct ieee80211_tx_ampdu *tap; 939173273Ssam int ac; 940173273Ssam 941178354Ssam KASSERT(vap->iv_flags_ext & IEEE80211_FEXT_HT, ("no HT requested")); 942173273Ssam 943173273Ssam /* XXX check scan cache in case peer has an ap and we have info */ 944173273Ssam /* 945173273Ssam * If setup with a legacy channel; locate an HT channel. 946173273Ssam * Otherwise if the inherited channel (from a companion 947173273Ssam * AP) is suitable use it so we use the same location 948173273Ssam * for the extension channel). 949173273Ssam */ 950178354Ssam ni->ni_chan = ieee80211_ht_adjust_channel(ni->ni_ic, 951178354Ssam ni->ni_chan, ieee80211_htchanflags(ni->ni_chan)); 952173273Ssam 953173273Ssam ni->ni_htcap = 0; 954178354Ssam if (vap->iv_flags_ext & IEEE80211_FEXT_SHORTGI20) 955173273Ssam ni->ni_htcap |= IEEE80211_HTCAP_SHORTGI20; 956173273Ssam if (IEEE80211_IS_CHAN_HT40(ni->ni_chan)) { 957173273Ssam ni->ni_htcap |= IEEE80211_HTCAP_CHWIDTH40; 958173273Ssam ni->ni_chw = 40; 959173273Ssam if (IEEE80211_IS_CHAN_HT40U(ni->ni_chan)) 960173273Ssam ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_ABOVE; 961173273Ssam else if (IEEE80211_IS_CHAN_HT40D(ni->ni_chan)) 962173273Ssam ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_BELOW; 963178354Ssam if (vap->iv_flags_ext & IEEE80211_FEXT_SHORTGI40) 964173273Ssam ni->ni_htcap |= IEEE80211_HTCAP_SHORTGI40; 965173273Ssam } else { 966173273Ssam ni->ni_chw = 20; 967173273Ssam ni->ni_ht2ndchan = IEEE80211_HTINFO_2NDCHAN_NONE; 968173273Ssam } 969173273Ssam ni->ni_htctlchan = ni->ni_chan->ic_ieee; 970183256Ssam if (vap->iv_flags_ext & IEEE80211_FEXT_RIFS) 971183256Ssam ni->ni_flags |= IEEE80211_NODE_RIFS; 972183256Ssam /* XXX does it make sense to enable SMPS? */ 973173273Ssam 974173273Ssam ni->ni_htopmode = 0; /* XXX need protection state */ 975173273Ssam ni->ni_htstbc = 0; /* XXX need info */ 976173273Ssam 977173273Ssam for (ac = 0; ac < WME_NUM_AC; ac++) { 978173273Ssam tap = &ni->ni_tx_ampdu[ac]; 979173273Ssam tap->txa_ac = ac; 980173273Ssam } 981173273Ssam /* NB: AMPDU tx/rx governed by IEEE80211_FEXT_AMPDU_{TX,RX} */ 982173273Ssam ni->ni_flags |= IEEE80211_NODE_HT | IEEE80211_NODE_AMPDU; 983173273Ssam} 984173273Ssam 985173273Ssam/* 986173273Ssam * Notify hostap vaps of a change in the HTINFO ie. 987173273Ssam */ 988173273Ssamstatic void 989173273Ssamhtinfo_notify(struct ieee80211com *ic) 990173273Ssam{ 991178354Ssam struct ieee80211vap *vap; 992178354Ssam int first = 1; 993178354Ssam 994178354Ssam IEEE80211_LOCK_ASSERT(ic); 995178354Ssam 996178354Ssam TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) { 997178354Ssam if (vap->iv_opmode != IEEE80211_M_HOSTAP) 998178354Ssam continue; 999183253Ssam if (vap->iv_state != IEEE80211_S_RUN || 1000183253Ssam !IEEE80211_IS_CHAN_HT(vap->iv_bss->ni_chan)) 1001183253Ssam continue; 1002178354Ssam if (first) { 1003178354Ssam IEEE80211_NOTE(vap, 1004178354Ssam IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, 1005178354Ssam vap->iv_bss, 1006178354Ssam "HT bss occupancy change: %d sta, %d ht, " 1007178354Ssam "%d ht40%s, HT protmode now 0x%x" 1008178354Ssam , ic->ic_sta_assoc 1009178354Ssam , ic->ic_ht_sta_assoc 1010178354Ssam , ic->ic_ht40_sta_assoc 1011178354Ssam , (ic->ic_flags_ext & IEEE80211_FEXT_NONHT_PR) ? 1012178354Ssam ", non-HT sta present" : "" 1013178354Ssam , ic->ic_curhtprotmode); 1014178354Ssam first = 0; 1015178354Ssam } 1016178354Ssam ieee80211_beacon_notify(vap, IEEE80211_BEACON_HTINFO); 1017178354Ssam } 1018173273Ssam} 1019173273Ssam 1020173273Ssam/* 1021173273Ssam * Calculate HT protection mode from current 1022173273Ssam * state and handle updates. 1023173273Ssam */ 1024173273Ssamstatic void 1025173273Ssamhtinfo_update(struct ieee80211com *ic) 1026173273Ssam{ 1027173273Ssam uint8_t protmode; 1028173273Ssam 1029178354Ssam if (ic->ic_sta_assoc != ic->ic_ht_sta_assoc) { 1030178354Ssam protmode = IEEE80211_HTINFO_OPMODE_MIXED 1031178354Ssam | IEEE80211_HTINFO_NONHT_PRESENT; 1032178354Ssam } else if (ic->ic_flags_ext & IEEE80211_FEXT_NONHT_PR) { 1033173273Ssam protmode = IEEE80211_HTINFO_OPMODE_PROTOPT 1034178354Ssam | IEEE80211_HTINFO_NONHT_PRESENT; 1035178354Ssam } else if (ic->ic_bsschan != IEEE80211_CHAN_ANYC && 1036178354Ssam IEEE80211_IS_CHAN_HT40(ic->ic_bsschan) && 1037173273Ssam ic->ic_sta_assoc != ic->ic_ht40_sta_assoc) { 1038173273Ssam protmode = IEEE80211_HTINFO_OPMODE_HT20PR; 1039173273Ssam } else { 1040173273Ssam protmode = IEEE80211_HTINFO_OPMODE_PURE; 1041173273Ssam } 1042173273Ssam if (protmode != ic->ic_curhtprotmode) { 1043173273Ssam ic->ic_curhtprotmode = protmode; 1044173273Ssam htinfo_notify(ic); 1045173273Ssam } 1046173273Ssam} 1047173273Ssam 1048173273Ssam/* 1049173273Ssam * Handle an HT station joining a BSS. 1050173273Ssam */ 1051173273Ssamvoid 1052173273Ssamieee80211_ht_node_join(struct ieee80211_node *ni) 1053173273Ssam{ 1054173273Ssam struct ieee80211com *ic = ni->ni_ic; 1055173273Ssam 1056173273Ssam IEEE80211_LOCK_ASSERT(ic); 1057173273Ssam 1058173273Ssam if (ni->ni_flags & IEEE80211_NODE_HT) { 1059173273Ssam ic->ic_ht_sta_assoc++; 1060173273Ssam if (ni->ni_chw == 40) 1061173273Ssam ic->ic_ht40_sta_assoc++; 1062173273Ssam } 1063173273Ssam htinfo_update(ic); 1064173273Ssam} 1065173273Ssam 1066173273Ssam/* 1067173273Ssam * Handle an HT station leaving a BSS. 1068173273Ssam */ 1069173273Ssamvoid 1070173273Ssamieee80211_ht_node_leave(struct ieee80211_node *ni) 1071173273Ssam{ 1072173273Ssam struct ieee80211com *ic = ni->ni_ic; 1073173273Ssam 1074173273Ssam IEEE80211_LOCK_ASSERT(ic); 1075173273Ssam 1076173273Ssam if (ni->ni_flags & IEEE80211_NODE_HT) { 1077173273Ssam ic->ic_ht_sta_assoc--; 1078173273Ssam if (ni->ni_chw == 40) 1079173273Ssam ic->ic_ht40_sta_assoc--; 1080173273Ssam } 1081173273Ssam htinfo_update(ic); 1082173273Ssam} 1083173273Ssam 1084173273Ssam/* 1085173273Ssam * Public version of htinfo_update; used for processing 1086178354Ssam * beacon frames from overlapping bss. 1087178354Ssam * 1088178354Ssam * Caller can specify either IEEE80211_HTINFO_OPMODE_MIXED 1089178354Ssam * (on receipt of a beacon that advertises MIXED) or 1090178354Ssam * IEEE80211_HTINFO_OPMODE_PROTOPT (on receipt of a beacon 1091178354Ssam * from an overlapping legacy bss). We treat MIXED with 1092178354Ssam * a higher precedence than PROTOPT (i.e. we will not change 1093178354Ssam * change PROTOPT -> MIXED; only MIXED -> PROTOPT). This 1094178354Ssam * corresponds to how we handle things in htinfo_update. 1095173273Ssam */ 1096173273Ssamvoid 1097178354Ssamieee80211_htprot_update(struct ieee80211com *ic, int protmode) 1098173273Ssam{ 1099178354Ssam#define OPMODE(x) SM(x, IEEE80211_HTINFO_OPMODE) 1100183246Ssam IEEE80211_LOCK(ic); 1101178354Ssam 1102178354Ssam /* track non-HT station presence */ 1103178354Ssam KASSERT(protmode & IEEE80211_HTINFO_NONHT_PRESENT, 1104183246Ssam ("protmode 0x%x", protmode)); 1105178354Ssam ic->ic_flags_ext |= IEEE80211_FEXT_NONHT_PR; 1106178354Ssam ic->ic_lastnonht = ticks; 1107178354Ssam 1108183246Ssam if (protmode != ic->ic_curhtprotmode && 1109183246Ssam (OPMODE(ic->ic_curhtprotmode) != IEEE80211_HTINFO_OPMODE_MIXED || 1110183246Ssam OPMODE(protmode) == IEEE80211_HTINFO_OPMODE_PROTOPT)) { 1111183246Ssam /* push beacon update */ 1112183246Ssam ic->ic_curhtprotmode = protmode; 1113183246Ssam htinfo_notify(ic); 1114183246Ssam } 1115181197Ssam IEEE80211_UNLOCK(ic); 1116178354Ssam#undef OPMODE 1117173273Ssam} 1118173273Ssam 1119173273Ssam/* 1120173273Ssam * Time out presence of an overlapping bss with non-HT 1121173273Ssam * stations. When operating in hostap mode we listen for 1122173273Ssam * beacons from other stations and if we identify a non-HT 1123173273Ssam * station is present we update the opmode field of the 1124173273Ssam * HTINFO ie. To identify when all non-HT stations are 1125173273Ssam * gone we time out this condition. 1126173273Ssam */ 1127173273Ssamvoid 1128173273Ssamieee80211_ht_timeout(struct ieee80211com *ic) 1129173273Ssam{ 1130173273Ssam IEEE80211_LOCK_ASSERT(ic); 1131173273Ssam 1132173273Ssam if ((ic->ic_flags_ext & IEEE80211_FEXT_NONHT_PR) && 1133173273Ssam time_after(ticks, ic->ic_lastnonht + IEEE80211_NONHT_PRESENT_AGE)) { 1134173273Ssam#if 0 1135178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni, 1136173273Ssam "%s", "time out non-HT STA present on channel"); 1137173273Ssam#endif 1138173273Ssam ic->ic_flags_ext &= ~IEEE80211_FEXT_NONHT_PR; 1139173273Ssam htinfo_update(ic); 1140173273Ssam } 1141173273Ssam} 1142173273Ssam 1143170530Ssam/* unalligned little endian access */ 1144170530Ssam#define LE_READ_2(p) \ 1145170530Ssam ((uint16_t) \ 1146170530Ssam ((((const uint8_t *)(p))[0] ) | \ 1147170530Ssam (((const uint8_t *)(p))[1] << 8))) 1148170530Ssam 1149170530Ssam/* 1150170530Ssam * Process an 802.11n HT capabilities ie. 1151170530Ssam */ 1152170530Ssamvoid 1153170530Ssamieee80211_parse_htcap(struct ieee80211_node *ni, const uint8_t *ie) 1154170530Ssam{ 1155170530Ssam if (ie[0] == IEEE80211_ELEMID_VENDOR) { 1156170530Ssam /* 1157170530Ssam * Station used Vendor OUI ie to associate; 1158170530Ssam * mark the node so when we respond we'll use 1159170530Ssam * the Vendor OUI's and not the standard ie's. 1160170530Ssam */ 1161170530Ssam ni->ni_flags |= IEEE80211_NODE_HTCOMPAT; 1162170530Ssam ie += 4; 1163170530Ssam } else 1164170530Ssam ni->ni_flags &= ~IEEE80211_NODE_HTCOMPAT; 1165170530Ssam 1166170530Ssam ni->ni_htcap = LE_READ_2(ie + 1167170530Ssam __offsetof(struct ieee80211_ie_htcap, hc_cap)); 1168170530Ssam ni->ni_htparam = ie[__offsetof(struct ieee80211_ie_htcap, hc_param)]; 1169170530Ssam} 1170170530Ssam 1171183254Ssamstatic void 1172183254Ssamhtinfo_parse(struct ieee80211_node *ni, 1173183254Ssam const struct ieee80211_ie_htinfo *htinfo) 1174170530Ssam{ 1175170530Ssam uint16_t w; 1176170530Ssam 1177170530Ssam ni->ni_htctlchan = htinfo->hi_ctrlchannel; 1178170530Ssam ni->ni_ht2ndchan = SM(htinfo->hi_byte1, IEEE80211_HTINFO_2NDCHAN); 1179172055Ssam w = LE_READ_2(&htinfo->hi_byte2); 1180170530Ssam ni->ni_htopmode = SM(w, IEEE80211_HTINFO_OPMODE); 1181170530Ssam w = LE_READ_2(&htinfo->hi_byte45); 1182170530Ssam ni->ni_htstbc = SM(w, IEEE80211_HTINFO_BASIC_STBCMCS); 1183183254Ssam} 1184183254Ssam 1185183254Ssam/* 1186183254Ssam * Parse an 802.11n HT info ie and save useful information 1187183254Ssam * to the node state. Note this does not effect any state 1188183254Ssam * changes such as for channel width change. 1189183254Ssam */ 1190183254Ssamvoid 1191183254Ssamieee80211_parse_htinfo(struct ieee80211_node *ni, const uint8_t *ie) 1192183254Ssam{ 1193183254Ssam if (ie[0] == IEEE80211_ELEMID_VENDOR) 1194183254Ssam ie += 4; 1195183254Ssam htinfo_parse(ni, (const struct ieee80211_ie_htinfo *) ie); 1196183254Ssam} 1197183254Ssam 1198183254Ssam/* 1199183254Ssam * Handle 11n channel switch. Use the received HT ie's to 1200183254Ssam * identify the right channel to use. If we cannot locate it 1201183254Ssam * in the channel table then fallback to legacy operation. 1202183254Ssam * Note that we use this information to identify the node's 1203183254Ssam * channel only; the caller is responsible for insuring any 1204183254Ssam * required channel change is done (e.g. in sta mode when 1205183254Ssam * parsing the contents of a beacon frame). 1206183254Ssam */ 1207183254Ssamstatic void 1208183254Ssamhtinfo_update_chw(struct ieee80211_node *ni, int htflags) 1209183254Ssam{ 1210183254Ssam struct ieee80211com *ic = ni->ni_ic; 1211183254Ssam struct ieee80211_channel *c; 1212183254Ssam int chanflags; 1213183254Ssam 1214173273Ssam chanflags = (ni->ni_chan->ic_flags &~ IEEE80211_CHAN_HT) | htflags; 1215173273Ssam if (chanflags != ni->ni_chan->ic_flags) { 1216183254Ssam /* XXX not right for ht40- */ 1217173273Ssam c = ieee80211_find_channel(ic, ni->ni_chan->ic_freq, chanflags); 1218178354Ssam if (c == NULL && (htflags & IEEE80211_CHAN_HT40)) { 1219173273Ssam /* 1220173273Ssam * No HT40 channel entry in our table; fall back 1221173273Ssam * to HT20 operation. This should not happen. 1222173273Ssam */ 1223173273Ssam c = findhtchan(ic, ni->ni_chan, IEEE80211_CHAN_HT20); 1224183254Ssam#if 0 1225183254Ssam IEEE80211_NOTE(ni->ni_vap, 1226173273Ssam IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni, 1227173273Ssam "no HT40 channel (freq %u), falling back to HT20", 1228173273Ssam ni->ni_chan->ic_freq); 1229183254Ssam#endif 1230173273Ssam /* XXX stat */ 1231173273Ssam } 1232173273Ssam if (c != NULL && c != ni->ni_chan) { 1233183254Ssam IEEE80211_NOTE(ni->ni_vap, 1234173273Ssam IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni, 1235173273Ssam "switch station to HT%d channel %u/0x%x", 1236173273Ssam IEEE80211_IS_CHAN_HT40(c) ? 40 : 20, 1237173273Ssam c->ic_freq, c->ic_flags); 1238173273Ssam ni->ni_chan = c; 1239173273Ssam } 1240173273Ssam /* NB: caller responsible for forcing any channel change */ 1241173273Ssam } 1242173273Ssam /* update node's tx channel width */ 1243173273Ssam ni->ni_chw = IEEE80211_IS_CHAN_HT40(ni->ni_chan)? 40 : 20; 1244170530Ssam} 1245170530Ssam 1246170530Ssam/* 1247183255Ssam * Update 11n MIMO PS state according to received htcap. 1248183255Ssam */ 1249183255Ssamstatic __inline int 1250183255Ssamhtcap_update_mimo_ps(struct ieee80211_node *ni) 1251183255Ssam{ 1252183255Ssam uint16_t oflags = ni->ni_flags; 1253183255Ssam 1254183255Ssam switch (ni->ni_htcap & IEEE80211_HTCAP_SMPS) { 1255183255Ssam case IEEE80211_HTCAP_SMPS_DYNAMIC: 1256183255Ssam ni->ni_flags |= IEEE80211_NODE_MIMO_PS; 1257183255Ssam ni->ni_flags |= IEEE80211_NODE_MIMO_RTS; 1258183255Ssam break; 1259183255Ssam case IEEE80211_HTCAP_SMPS_ENA: 1260183255Ssam ni->ni_flags |= IEEE80211_NODE_MIMO_PS; 1261183255Ssam ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS; 1262183255Ssam break; 1263183255Ssam case IEEE80211_HTCAP_SMPS_OFF: 1264183255Ssam default: /* disable on rx of reserved value */ 1265183255Ssam ni->ni_flags &= ~IEEE80211_NODE_MIMO_PS; 1266183255Ssam ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS; 1267183255Ssam break; 1268183255Ssam } 1269183255Ssam return (oflags ^ ni->ni_flags); 1270183255Ssam} 1271183255Ssam 1272183255Ssam/* 1273183254Ssam * Parse and update HT-related state extracted from 1274183254Ssam * the HT cap and info ie's. 1275183254Ssam */ 1276183254Ssamvoid 1277183254Ssamieee80211_ht_updateparams(struct ieee80211_node *ni, 1278183254Ssam const uint8_t *htcapie, const uint8_t *htinfoie) 1279183254Ssam{ 1280183254Ssam struct ieee80211vap *vap = ni->ni_vap; 1281183254Ssam const struct ieee80211_ie_htinfo *htinfo; 1282183254Ssam int htflags; 1283183254Ssam 1284183254Ssam ieee80211_parse_htcap(ni, htcapie); 1285183255Ssam if (vap->iv_htcaps & IEEE80211_HTCAP_SMPS) 1286183255Ssam htcap_update_mimo_ps(ni); 1287183254Ssam 1288183254Ssam if (htinfoie[0] == IEEE80211_ELEMID_VENDOR) 1289183254Ssam htinfoie += 4; 1290183254Ssam htinfo = (const struct ieee80211_ie_htinfo *) htinfoie; 1291183254Ssam htinfo_parse(ni, htinfo); 1292183254Ssam 1293183254Ssam htflags = (vap->iv_flags_ext & IEEE80211_FEXT_HT) ? 1294183254Ssam IEEE80211_CHAN_HT20 : 0; 1295183254Ssam /* NB: honor operating mode constraint */ 1296183254Ssam if ((htinfo->hi_byte1 & IEEE80211_HTINFO_TXWIDTH_2040) && 1297183254Ssam (vap->iv_flags_ext & IEEE80211_FEXT_USEHT40)) { 1298183254Ssam if (ni->ni_ht2ndchan == IEEE80211_HTINFO_2NDCHAN_ABOVE) 1299183254Ssam htflags = IEEE80211_CHAN_HT40U; 1300183254Ssam else if (ni->ni_ht2ndchan == IEEE80211_HTINFO_2NDCHAN_BELOW) 1301183254Ssam htflags = IEEE80211_CHAN_HT40D; 1302183254Ssam } 1303183254Ssam htinfo_update_chw(ni, htflags); 1304183256Ssam 1305183256Ssam if ((htinfo->hi_byte1 & IEEE80211_HTINFO_RIFSMODE_PERM) && 1306183256Ssam (vap->iv_flags_ext & IEEE80211_FEXT_RIFS)) 1307183256Ssam ni->ni_flags |= IEEE80211_NODE_RIFS; 1308183256Ssam else 1309183256Ssam ni->ni_flags &= ~IEEE80211_NODE_RIFS; 1310183254Ssam} 1311183254Ssam 1312183254Ssam/* 1313183254Ssam * Parse and update HT-related state extracted from the HT cap ie 1314183254Ssam * for a station joining an HT BSS. 1315183254Ssam */ 1316183254Ssamvoid 1317183254Ssamieee80211_ht_updatehtcap(struct ieee80211_node *ni, const uint8_t *htcapie) 1318183254Ssam{ 1319183254Ssam struct ieee80211vap *vap = ni->ni_vap; 1320183254Ssam int htflags; 1321183254Ssam 1322183254Ssam ieee80211_parse_htcap(ni, htcapie); 1323183255Ssam if (vap->iv_htcaps & IEEE80211_HTCAP_SMPS) 1324183255Ssam htcap_update_mimo_ps(ni); 1325183254Ssam 1326183254Ssam /* NB: honor operating mode constraint */ 1327183254Ssam /* XXX 40 MHZ intolerant */ 1328183254Ssam htflags = (vap->iv_flags_ext & IEEE80211_FEXT_HT) ? 1329183254Ssam IEEE80211_CHAN_HT20 : 0; 1330183254Ssam if ((ni->ni_htcap & IEEE80211_HTCAP_CHWIDTH40) && 1331183254Ssam (vap->iv_flags_ext & IEEE80211_FEXT_USEHT40)) { 1332183254Ssam if (IEEE80211_IS_CHAN_HT40U(vap->iv_bss->ni_chan)) 1333183254Ssam htflags = IEEE80211_CHAN_HT40U; 1334183254Ssam else if (IEEE80211_IS_CHAN_HT40D(vap->iv_bss->ni_chan)) 1335183254Ssam htflags = IEEE80211_CHAN_HT40D; 1336183254Ssam } 1337183254Ssam htinfo_update_chw(ni, htflags); 1338183254Ssam} 1339183254Ssam 1340183254Ssam/* 1341170530Ssam * Install received HT rate set by parsing the HT cap ie. 1342170530Ssam */ 1343170530Ssamint 1344170530Ssamieee80211_setup_htrates(struct ieee80211_node *ni, const uint8_t *ie, int flags) 1345170530Ssam{ 1346178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1347170530Ssam const struct ieee80211_ie_htcap *htcap; 1348170530Ssam struct ieee80211_htrateset *rs; 1349170530Ssam int i; 1350170530Ssam 1351170530Ssam rs = &ni->ni_htrates; 1352170530Ssam memset(rs, 0, sizeof(*rs)); 1353170530Ssam if (ie != NULL) { 1354170530Ssam if (ie[0] == IEEE80211_ELEMID_VENDOR) 1355170530Ssam ie += 4; 1356170530Ssam htcap = (const struct ieee80211_ie_htcap *) ie; 1357170530Ssam for (i = 0; i < IEEE80211_HTRATE_MAXSIZE; i++) { 1358170530Ssam if (isclr(htcap->hc_mcsset, i)) 1359170530Ssam continue; 1360170530Ssam if (rs->rs_nrates == IEEE80211_HTRATE_MAXSIZE) { 1361178354Ssam IEEE80211_NOTE(vap, 1362170530Ssam IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni, 1363170530Ssam "WARNING, HT rate set too large; only " 1364170530Ssam "using %u rates", IEEE80211_HTRATE_MAXSIZE); 1365178354Ssam vap->iv_stats.is_rx_rstoobig++; 1366170530Ssam break; 1367170530Ssam } 1368170530Ssam rs->rs_rates[rs->rs_nrates++] = i; 1369170530Ssam } 1370170530Ssam } 1371170530Ssam return ieee80211_fix_rate(ni, (struct ieee80211_rateset *) rs, flags); 1372170530Ssam} 1373170530Ssam 1374170530Ssam/* 1375170530Ssam * Mark rates in a node's HT rate set as basic according 1376170530Ssam * to the information in the supplied HT info ie. 1377170530Ssam */ 1378170530Ssamvoid 1379170530Ssamieee80211_setup_basic_htrates(struct ieee80211_node *ni, const uint8_t *ie) 1380170530Ssam{ 1381170530Ssam const struct ieee80211_ie_htinfo *htinfo; 1382170530Ssam struct ieee80211_htrateset *rs; 1383170530Ssam int i, j; 1384170530Ssam 1385170530Ssam if (ie[0] == IEEE80211_ELEMID_VENDOR) 1386170530Ssam ie += 4; 1387170530Ssam htinfo = (const struct ieee80211_ie_htinfo *) ie; 1388170530Ssam rs = &ni->ni_htrates; 1389170530Ssam if (rs->rs_nrates == 0) { 1390178354Ssam IEEE80211_NOTE(ni->ni_vap, 1391170530Ssam IEEE80211_MSG_XRATE | IEEE80211_MSG_11N, ni, 1392170530Ssam "%s", "WARNING, empty HT rate set"); 1393170530Ssam return; 1394170530Ssam } 1395170530Ssam for (i = 0; i < IEEE80211_HTRATE_MAXSIZE; i++) { 1396170530Ssam if (isclr(htinfo->hi_basicmcsset, i)) 1397170530Ssam continue; 1398170530Ssam for (j = 0; j < rs->rs_nrates; j++) 1399170530Ssam if ((rs->rs_rates[j] & IEEE80211_RATE_VAL) == i) 1400170530Ssam rs->rs_rates[j] |= IEEE80211_RATE_BASIC; 1401170530Ssam } 1402170530Ssam} 1403170530Ssam 1404170530Ssamstatic void 1405170530Ssamaddba_timeout(void *arg) 1406170530Ssam{ 1407170530Ssam struct ieee80211_tx_ampdu *tap = arg; 1408170530Ssam 1409170530Ssam /* XXX ? */ 1410170530Ssam tap->txa_flags &= ~IEEE80211_AGGR_XCHGPEND; 1411170530Ssam tap->txa_attempts++; 1412170530Ssam} 1413170530Ssam 1414170530Ssamstatic void 1415170530Ssamaddba_start_timeout(struct ieee80211_tx_ampdu *tap) 1416170530Ssam{ 1417170530Ssam /* XXX use CALLOUT_PENDING instead? */ 1418178354Ssam callout_reset(&tap->txa_timer, ieee80211_addba_timeout, 1419170530Ssam addba_timeout, tap); 1420170530Ssam tap->txa_flags |= IEEE80211_AGGR_XCHGPEND; 1421178354Ssam tap->txa_nextrequest = ticks + ieee80211_addba_timeout; 1422170530Ssam} 1423170530Ssam 1424170530Ssamstatic void 1425170530Ssamaddba_stop_timeout(struct ieee80211_tx_ampdu *tap) 1426170530Ssam{ 1427170530Ssam /* XXX use CALLOUT_PENDING instead? */ 1428170530Ssam if (tap->txa_flags & IEEE80211_AGGR_XCHGPEND) { 1429170530Ssam callout_stop(&tap->txa_timer); 1430170530Ssam tap->txa_flags &= ~IEEE80211_AGGR_XCHGPEND; 1431170530Ssam } 1432170530Ssam} 1433170530Ssam 1434170530Ssam/* 1435170530Ssam * Default method for requesting A-MPDU tx aggregation. 1436170530Ssam * We setup the specified state block and start a timer 1437170530Ssam * to wait for an ADDBA response frame. 1438170530Ssam */ 1439170530Ssamstatic int 1440170530Ssamieee80211_addba_request(struct ieee80211_node *ni, 1441170530Ssam struct ieee80211_tx_ampdu *tap, 1442170530Ssam int dialogtoken, int baparamset, int batimeout) 1443170530Ssam{ 1444170530Ssam int bufsiz; 1445170530Ssam 1446170530Ssam /* XXX locking */ 1447170530Ssam tap->txa_token = dialogtoken; 1448170530Ssam tap->txa_flags |= IEEE80211_AGGR_IMMEDIATE; 1449183245Ssam tap->txa_start = 0; 1450170530Ssam bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ); 1451170530Ssam tap->txa_wnd = (bufsiz == 0) ? 1452170530Ssam IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX); 1453170530Ssam addba_start_timeout(tap); 1454170530Ssam return 1; 1455170530Ssam} 1456170530Ssam 1457170530Ssam/* 1458170530Ssam * Default method for processing an A-MPDU tx aggregation 1459170530Ssam * response. We shutdown any pending timer and update the 1460170530Ssam * state block according to the reply. 1461170530Ssam */ 1462170530Ssamstatic int 1463170530Ssamieee80211_addba_response(struct ieee80211_node *ni, 1464170530Ssam struct ieee80211_tx_ampdu *tap, 1465170530Ssam int status, int baparamset, int batimeout) 1466170530Ssam{ 1467170530Ssam int bufsiz; 1468170530Ssam 1469170530Ssam /* XXX locking */ 1470170530Ssam addba_stop_timeout(tap); 1471170530Ssam if (status == IEEE80211_STATUS_SUCCESS) { 1472170530Ssam bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ); 1473170530Ssam /* XXX override our request? */ 1474170530Ssam tap->txa_wnd = (bufsiz == 0) ? 1475170530Ssam IEEE80211_AGGR_BAWMAX : min(bufsiz, IEEE80211_AGGR_BAWMAX); 1476170530Ssam tap->txa_flags |= IEEE80211_AGGR_RUNNING; 1477173273Ssam } else { 1478173273Ssam /* mark tid so we don't try again */ 1479173273Ssam tap->txa_flags |= IEEE80211_AGGR_NAK; 1480170530Ssam } 1481170530Ssam return 1; 1482170530Ssam} 1483170530Ssam 1484170530Ssam/* 1485170530Ssam * Default method for stopping A-MPDU tx aggregation. 1486170530Ssam * Any timer is cleared and we drain any pending frames. 1487170530Ssam */ 1488170530Ssamstatic void 1489170530Ssamieee80211_addba_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap) 1490170530Ssam{ 1491170530Ssam /* XXX locking */ 1492170530Ssam addba_stop_timeout(tap); 1493170530Ssam if (tap->txa_flags & IEEE80211_AGGR_RUNNING) { 1494182830Ssam /* XXX clear aggregation queue */ 1495170530Ssam tap->txa_flags &= ~IEEE80211_AGGR_RUNNING; 1496170530Ssam } 1497170530Ssam tap->txa_attempts = 0; 1498170530Ssam} 1499170530Ssam 1500170530Ssam/* 1501170530Ssam * Process a received action frame using the default aggregation 1502170530Ssam * policy. We intercept ADDBA-related frames and use them to 1503170530Ssam * update our aggregation state. All other frames are passed up 1504170530Ssam * for processing by ieee80211_recv_action. 1505170530Ssam */ 1506170530Ssamstatic void 1507170530Ssamieee80211_aggr_recv_action(struct ieee80211_node *ni, 1508170530Ssam const uint8_t *frm, const uint8_t *efrm) 1509170530Ssam{ 1510170530Ssam struct ieee80211com *ic = ni->ni_ic; 1511178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1512170530Ssam const struct ieee80211_action *ia; 1513170530Ssam struct ieee80211_rx_ampdu *rap; 1514170530Ssam struct ieee80211_tx_ampdu *tap; 1515182829Ssam uint8_t dialogtoken, policy; 1516170530Ssam uint16_t baparamset, batimeout, baseqctl, code; 1517170530Ssam uint16_t args[4]; 1518170530Ssam int tid, ac, bufsiz; 1519170530Ssam 1520170530Ssam ia = (const struct ieee80211_action *) frm; 1521170530Ssam switch (ia->ia_category) { 1522170530Ssam case IEEE80211_ACTION_CAT_BA: 1523170530Ssam switch (ia->ia_action) { 1524170530Ssam case IEEE80211_ACTION_BA_ADDBA_REQUEST: 1525170530Ssam dialogtoken = frm[2]; 1526170530Ssam baparamset = LE_READ_2(frm+3); 1527170530Ssam batimeout = LE_READ_2(frm+5); 1528170530Ssam baseqctl = LE_READ_2(frm+7); 1529170530Ssam 1530170530Ssam tid = MS(baparamset, IEEE80211_BAPS_TID); 1531170530Ssam bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ); 1532170530Ssam 1533178354Ssam IEEE80211_NOTE(vap, 1534170530Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 1535170530Ssam "recv ADDBA request: dialogtoken %u " 1536170530Ssam "baparamset 0x%x (tid %d bufsiz %d) batimeout %d " 1537173273Ssam "baseqctl %d:%d", 1538173273Ssam dialogtoken, baparamset, tid, bufsiz, batimeout, 1539173273Ssam MS(baseqctl, IEEE80211_BASEQ_START), 1540173273Ssam MS(baseqctl, IEEE80211_BASEQ_FRAG)); 1541170530Ssam 1542170530Ssam rap = &ni->ni_rx_ampdu[tid]; 1543170530Ssam 1544170530Ssam /* Send ADDBA response */ 1545170530Ssam args[0] = dialogtoken; 1546173273Ssam /* 1547173273Ssam * NB: We ack only if the sta associated with HT and 1548173273Ssam * the ap is configured to do AMPDU rx (the latter 1549173273Ssam * violates the 11n spec and is mostly for testing). 1550173273Ssam */ 1551173273Ssam if ((ni->ni_flags & IEEE80211_NODE_AMPDU_RX) && 1552178354Ssam (vap->iv_flags_ext & IEEE80211_FEXT_AMPDU_RX)) { 1553170530Ssam ampdu_rx_start(rap, bufsiz, 1554170530Ssam MS(baseqctl, IEEE80211_BASEQ_START)); 1555170530Ssam 1556170530Ssam args[1] = IEEE80211_STATUS_SUCCESS; 1557173273Ssam } else { 1558178354Ssam IEEE80211_NOTE(vap, 1559173273Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 1560173273Ssam ni, "reject ADDBA request: %s", 1561173273Ssam ni->ni_flags & IEEE80211_NODE_AMPDU_RX ? 1562173273Ssam "administratively disabled" : 1563173273Ssam "not negotiated for station"); 1564178354Ssam vap->iv_stats.is_addba_reject++; 1565170530Ssam args[1] = IEEE80211_STATUS_UNSPECIFIED; 1566173273Ssam } 1567170530Ssam /* XXX honor rap flags? */ 1568170530Ssam args[2] = IEEE80211_BAPS_POLICY_IMMEDIATE 1569170530Ssam | SM(tid, IEEE80211_BAPS_TID) 1570170530Ssam | SM(rap->rxa_wnd, IEEE80211_BAPS_BUFSIZ) 1571170530Ssam ; 1572170530Ssam args[3] = 0; 1573170530Ssam ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA, 1574170530Ssam IEEE80211_ACTION_BA_ADDBA_RESPONSE, args); 1575170530Ssam return; 1576170530Ssam 1577170530Ssam case IEEE80211_ACTION_BA_ADDBA_RESPONSE: 1578170530Ssam dialogtoken = frm[2]; 1579170530Ssam code = LE_READ_2(frm+3); 1580170530Ssam baparamset = LE_READ_2(frm+5); 1581170530Ssam tid = MS(baparamset, IEEE80211_BAPS_TID); 1582170530Ssam bufsiz = MS(baparamset, IEEE80211_BAPS_BUFSIZ); 1583182829Ssam policy = MS(baparamset, IEEE80211_BAPS_POLICY); 1584170530Ssam batimeout = LE_READ_2(frm+7); 1585170530Ssam 1586173273Ssam ac = TID_TO_WME_AC(tid); 1587173273Ssam tap = &ni->ni_tx_ampdu[ac]; 1588175877Ssam if ((tap->txa_flags & IEEE80211_AGGR_XCHGPEND) == 0) { 1589178354Ssam IEEE80211_DISCARD_MAC(vap, 1590173273Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 1591173273Ssam ni->ni_macaddr, "ADDBA response", 1592173273Ssam "no pending ADDBA, tid %d dialogtoken %u " 1593173273Ssam "code %d", tid, dialogtoken, code); 1594178354Ssam vap->iv_stats.is_addba_norequest++; 1595173273Ssam return; 1596173273Ssam } 1597173273Ssam if (dialogtoken != tap->txa_token) { 1598178354Ssam IEEE80211_DISCARD_MAC(vap, 1599173273Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 1600173273Ssam ni->ni_macaddr, "ADDBA response", 1601173273Ssam "dialogtoken mismatch: waiting for %d, " 1602173273Ssam "received %d, tid %d code %d", 1603173273Ssam tap->txa_token, dialogtoken, tid, code); 1604178354Ssam vap->iv_stats.is_addba_badtoken++; 1605173273Ssam return; 1606173273Ssam } 1607182829Ssam /* NB: assumes IEEE80211_AGGR_IMMEDIATE is 1 */ 1608182829Ssam if (policy != (tap->txa_flags & IEEE80211_AGGR_IMMEDIATE)) { 1609182829Ssam IEEE80211_DISCARD_MAC(vap, 1610182829Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 1611182829Ssam ni->ni_macaddr, "ADDBA response", 1612182829Ssam "policy mismatch: expecting %s, " 1613182829Ssam "received %s, tid %d code %d", 1614182829Ssam tap->txa_flags & IEEE80211_AGGR_IMMEDIATE, 1615182829Ssam policy, tid, code); 1616182829Ssam vap->iv_stats.is_addba_badpolicy++; 1617182829Ssam return; 1618182829Ssam } 1619182829Ssam#if 0 1620182829Ssam /* XXX we take MIN in ieee80211_addba_response */ 1621182829Ssam if (bufsiz > IEEE80211_AGGR_BAWMAX) { 1622182829Ssam IEEE80211_DISCARD_MAC(vap, 1623182829Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 1624182829Ssam ni->ni_macaddr, "ADDBA response", 1625182829Ssam "BA window too large: max %d, " 1626182829Ssam "received %d, tid %d code %d", 1627182829Ssam bufsiz, IEEE80211_AGGR_BAWMAX, tid, code); 1628182829Ssam vap->iv_stats.is_addba_badbawinsize++; 1629182829Ssam return; 1630182829Ssam } 1631182829Ssam#endif 1632173273Ssam 1633178354Ssam IEEE80211_NOTE(vap, 1634170530Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 1635170530Ssam "recv ADDBA response: dialogtoken %u code %d " 1636170530Ssam "baparamset 0x%x (tid %d bufsiz %d) batimeout %d", 1637170530Ssam dialogtoken, code, baparamset, tid, bufsiz, 1638170530Ssam batimeout); 1639170530Ssam ic->ic_addba_response(ni, tap, 1640170530Ssam code, baparamset, batimeout); 1641170530Ssam return; 1642170530Ssam 1643170530Ssam case IEEE80211_ACTION_BA_DELBA: 1644170530Ssam baparamset = LE_READ_2(frm+2); 1645170530Ssam code = LE_READ_2(frm+4); 1646170530Ssam 1647170530Ssam tid = MS(baparamset, IEEE80211_DELBAPS_TID); 1648170530Ssam 1649178354Ssam IEEE80211_NOTE(vap, 1650170530Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 1651170530Ssam "recv DELBA: baparamset 0x%x (tid %d initiator %d) " 1652170530Ssam "code %d", baparamset, tid, 1653170530Ssam MS(baparamset, IEEE80211_DELBAPS_INIT), code); 1654170530Ssam 1655170530Ssam if ((baparamset & IEEE80211_DELBAPS_INIT) == 0) { 1656170530Ssam ac = TID_TO_WME_AC(tid); 1657170530Ssam tap = &ni->ni_tx_ampdu[ac]; 1658170530Ssam ic->ic_addba_stop(ni, tap); 1659170530Ssam } else { 1660170530Ssam rap = &ni->ni_rx_ampdu[tid]; 1661170530Ssam ampdu_rx_stop(rap); 1662170530Ssam } 1663170530Ssam return; 1664170530Ssam } 1665170530Ssam break; 1666170530Ssam } 1667173273Ssam ieee80211_recv_action(ni, frm, efrm); 1668170530Ssam} 1669170530Ssam 1670170530Ssam/* 1671170530Ssam * Process a received 802.11n action frame. 1672170530Ssam * Aggregation-related frames are assumed to be handled 1673170530Ssam * already; we handle any other frames we can, otherwise 1674170530Ssam * complain about being unsupported (with debugging). 1675170530Ssam */ 1676170530Ssamvoid 1677170530Ssamieee80211_recv_action(struct ieee80211_node *ni, 1678170530Ssam const uint8_t *frm, const uint8_t *efrm) 1679170530Ssam{ 1680178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1681170530Ssam const struct ieee80211_action *ia; 1682170530Ssam int chw; 1683170530Ssam 1684170530Ssam ia = (const struct ieee80211_action *) frm; 1685170530Ssam switch (ia->ia_category) { 1686170530Ssam case IEEE80211_ACTION_CAT_BA: 1687178354Ssam IEEE80211_NOTE(vap, 1688170530Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 1689170530Ssam "%s: BA action %d not implemented", __func__, 1690170530Ssam ia->ia_action); 1691178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1692170530Ssam break; 1693170530Ssam case IEEE80211_ACTION_CAT_HT: 1694170530Ssam switch (ia->ia_action) { 1695170530Ssam case IEEE80211_ACTION_HT_TXCHWIDTH: 1696170530Ssam chw = frm[2] == IEEE80211_A_HT_TXCHWIDTH_2040 ? 40 : 20; 1697182831Ssam IEEE80211_NOTE(vap, 1698182831Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 1699182831Ssam "%s: HT txchwidth, width %d%s", 1700182831Ssam __func__, chw, ni->ni_chw != chw ? "*" : ""); 1701170530Ssam if (chw != ni->ni_chw) { 1702170530Ssam ni->ni_chw = chw; 1703182831Ssam /* XXX notify on change */ 1704170530Ssam } 1705170530Ssam break; 1706183255Ssam case IEEE80211_ACTION_HT_MIMOPWRSAVE: { 1707183255Ssam const struct ieee80211_action_ht_mimopowersave *mps = 1708183255Ssam (const struct ieee80211_action_ht_mimopowersave *) ia; 1709183255Ssam /* XXX check iv_htcaps */ 1710183255Ssam if (mps->am_control & IEEE80211_A_HT_MIMOPWRSAVE_ENA) 1711183255Ssam ni->ni_flags |= IEEE80211_NODE_MIMO_PS; 1712183255Ssam else 1713183255Ssam ni->ni_flags &= ~IEEE80211_NODE_MIMO_PS; 1714183255Ssam if (mps->am_control & IEEE80211_A_HT_MIMOPWRSAVE_MODE) 1715183255Ssam ni->ni_flags |= IEEE80211_NODE_MIMO_RTS; 1716183255Ssam else 1717183255Ssam ni->ni_flags &= ~IEEE80211_NODE_MIMO_RTS; 1718183255Ssam /* XXX notify on change */ 1719178354Ssam IEEE80211_NOTE(vap, 1720173273Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 1721183255Ssam "%s: HT MIMO PS (%s%s)", __func__, 1722183255Ssam (ni->ni_flags & IEEE80211_NODE_MIMO_PS) ? 1723183255Ssam "on" : "off", 1724183255Ssam (ni->ni_flags & IEEE80211_NODE_MIMO_RTS) ? 1725183255Ssam "+rts" : "" 1726183255Ssam ); 1727173273Ssam break; 1728183255Ssam } 1729170530Ssam default: 1730178354Ssam IEEE80211_NOTE(vap, 1731170530Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 1732170530Ssam "%s: HT action %d not implemented", __func__, 1733170530Ssam ia->ia_action); 1734178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1735170530Ssam break; 1736170530Ssam } 1737170530Ssam break; 1738170530Ssam default: 1739178354Ssam IEEE80211_NOTE(vap, 1740170530Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 1741170530Ssam "%s: category %d not implemented", __func__, 1742170530Ssam ia->ia_category); 1743178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1744170530Ssam break; 1745170530Ssam } 1746170530Ssam} 1747170530Ssam 1748170530Ssam/* 1749170530Ssam * Transmit processing. 1750170530Ssam */ 1751170530Ssam 1752170530Ssam/* 1753178354Ssam * Check if A-MPDU should be requested/enabled for a stream. 1754178354Ssam * We require a traffic rate above a per-AC threshold and we 1755178354Ssam * also handle backoff from previous failed attempts. 1756178354Ssam * 1757178354Ssam * Drivers may override this method to bring in information 1758178354Ssam * such as link state conditions in making the decision. 1759178354Ssam */ 1760178354Ssamstatic int 1761178354Ssamieee80211_ampdu_enable(struct ieee80211_node *ni, 1762178354Ssam struct ieee80211_tx_ampdu *tap) 1763178354Ssam{ 1764178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1765178354Ssam 1766178354Ssam if (tap->txa_avgpps < vap->iv_ampdu_mintraffic[tap->txa_ac]) 1767178354Ssam return 0; 1768178354Ssam /* XXX check rssi? */ 1769178354Ssam if (tap->txa_attempts >= ieee80211_addba_maxtries && 1770178354Ssam ticks < tap->txa_nextrequest) { 1771178354Ssam /* 1772178354Ssam * Don't retry too often; txa_nextrequest is set 1773178354Ssam * to the minimum interval we'll retry after 1774178354Ssam * ieee80211_addba_maxtries failed attempts are made. 1775178354Ssam */ 1776178354Ssam return 0; 1777178354Ssam } 1778178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_11N, ni, 1779183249Ssam "enable AMPDU on %s, avgpps %d pkts %d", 1780183249Ssam ieee80211_wme_acnames[tap->txa_ac], tap->txa_avgpps, tap->txa_pkts); 1781178354Ssam return 1; 1782178354Ssam} 1783178354Ssam 1784178354Ssam/* 1785170530Ssam * Request A-MPDU tx aggregation. Setup local state and 1786170530Ssam * issue an ADDBA request. BA use will only happen after 1787170530Ssam * the other end replies with ADDBA response. 1788170530Ssam */ 1789170530Ssamint 1790170530Ssamieee80211_ampdu_request(struct ieee80211_node *ni, 1791170530Ssam struct ieee80211_tx_ampdu *tap) 1792170530Ssam{ 1793170530Ssam struct ieee80211com *ic = ni->ni_ic; 1794170530Ssam uint16_t args[4]; 1795170530Ssam int tid, dialogtoken; 1796170530Ssam static int tokens = 0; /* XXX */ 1797170530Ssam 1798170530Ssam /* XXX locking */ 1799170530Ssam if ((tap->txa_flags & IEEE80211_AGGR_SETUP) == 0) { 1800170530Ssam /* do deferred setup of state */ 1801170530Ssam callout_init(&tap->txa_timer, CALLOUT_MPSAFE); 1802170530Ssam tap->txa_flags |= IEEE80211_AGGR_SETUP; 1803170530Ssam } 1804173273Ssam /* XXX hack for not doing proper locking */ 1805173273Ssam tap->txa_flags &= ~IEEE80211_AGGR_NAK; 1806173273Ssam 1807170530Ssam dialogtoken = (tokens+1) % 63; /* XXX */ 1808183245Ssam tid = WME_AC_TO_TID(tap->txa_ac); 1809183245Ssam tap->txa_start = ni->ni_txseqs[tid]; 1810170530Ssam 1811170530Ssam tid = WME_AC_TO_TID(tap->txa_ac); 1812170530Ssam args[0] = dialogtoken; 1813170530Ssam args[1] = IEEE80211_BAPS_POLICY_IMMEDIATE 1814170530Ssam | SM(tid, IEEE80211_BAPS_TID) 1815170530Ssam | SM(IEEE80211_AGGR_BAWMAX, IEEE80211_BAPS_BUFSIZ) 1816170530Ssam ; 1817170530Ssam args[2] = 0; /* batimeout */ 1818170530Ssam /* NB: do first so there's no race against reply */ 1819170530Ssam if (!ic->ic_addba_request(ni, tap, dialogtoken, args[1], args[2])) { 1820170530Ssam /* unable to setup state, don't make request */ 1821178354Ssam IEEE80211_NOTE(ni->ni_vap, IEEE80211_MSG_11N, 1822173273Ssam ni, "%s: could not setup BA stream for AC %d", 1823173273Ssam __func__, tap->txa_ac); 1824173273Ssam /* defer next try so we don't slam the driver with requests */ 1825178354Ssam tap->txa_attempts = ieee80211_addba_maxtries; 1826178354Ssam /* NB: check in case driver wants to override */ 1827178354Ssam if (tap->txa_nextrequest <= ticks) 1828178354Ssam tap->txa_nextrequest = ticks + ieee80211_addba_backoff; 1829170530Ssam return 0; 1830170530Ssam } 1831170530Ssam tokens = dialogtoken; /* allocate token */ 1832183245Ssam /* NB: after calling ic_addba_request so driver can set txa_start */ 1833183245Ssam args[3] = SM(tap->txa_start, IEEE80211_BASEQ_START) 1834178953Ssam | SM(0, IEEE80211_BASEQ_FRAG) 1835178953Ssam ; 1836170530Ssam return ic->ic_send_action(ni, IEEE80211_ACTION_CAT_BA, 1837170530Ssam IEEE80211_ACTION_BA_ADDBA_REQUEST, args); 1838170530Ssam} 1839170530Ssam 1840170530Ssam/* 1841173273Ssam * Terminate an AMPDU tx stream. State is reclaimed 1842173273Ssam * and the peer notified with a DelBA Action frame. 1843173273Ssam */ 1844173273Ssamvoid 1845183250Ssamieee80211_ampdu_stop(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap, 1846183250Ssam int reason) 1847173273Ssam{ 1848173273Ssam struct ieee80211com *ic = ni->ni_ic; 1849178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1850173273Ssam uint16_t args[4]; 1851173273Ssam 1852173273Ssam /* XXX locking */ 1853173273Ssam if (IEEE80211_AMPDU_RUNNING(tap)) { 1854178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 1855183250Ssam ni, "%s: stop BA stream for AC %d (reason %d)", 1856183250Ssam __func__, tap->txa_ac, reason); 1857178354Ssam vap->iv_stats.is_ampdu_stop++; 1858173273Ssam 1859173273Ssam ic->ic_addba_stop(ni, tap); 1860173273Ssam args[0] = WME_AC_TO_TID(tap->txa_ac); 1861173273Ssam args[1] = IEEE80211_DELBAPS_INIT; 1862183250Ssam args[2] = reason; /* XXX reason code */ 1863173273Ssam ieee80211_send_action(ni, IEEE80211_ACTION_CAT_BA, 1864173273Ssam IEEE80211_ACTION_BA_DELBA, args); 1865173273Ssam } else { 1866178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 1867183250Ssam ni, "%s: BA stream for AC %d not running (reason %d)", 1868183250Ssam __func__, tap->txa_ac, reason); 1869178354Ssam vap->iv_stats.is_ampdu_stop_failed++; 1870173273Ssam } 1871173273Ssam} 1872173273Ssam 1873173273Ssam/* 1874170530Ssam * Transmit a BAR frame to the specified node. The 1875170530Ssam * BAR contents are drawn from the supplied aggregation 1876170530Ssam * state associated with the node. 1877170530Ssam */ 1878170530Ssamint 1879170530Ssamieee80211_send_bar(struct ieee80211_node *ni, 1880170530Ssam const struct ieee80211_tx_ampdu *tap) 1881170530Ssam{ 1882178354Ssam#define senderr(_x, _v) do { vap->iv_stats._v++; ret = _x; goto bad; } while (0) 1883170530Ssam#define ADDSHORT(frm, v) do { \ 1884170530Ssam frm[0] = (v) & 0xff; \ 1885170530Ssam frm[1] = (v) >> 8; \ 1886170530Ssam frm += 2; \ 1887170530Ssam} while (0) 1888178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1889170530Ssam struct ieee80211com *ic = ni->ni_ic; 1890170530Ssam struct ieee80211_frame_min *wh; 1891170530Ssam struct mbuf *m; 1892170530Ssam uint8_t *frm; 1893170530Ssam uint16_t barctl, barseqctl; 1894170530Ssam int tid, ret; 1895170530Ssam 1896170530Ssam ieee80211_ref_node(ni); 1897170530Ssam 1898170530Ssam m = ieee80211_getmgtframe(&frm, 1899170530Ssam ic->ic_headroom + sizeof(struct ieee80211_frame_min), 1900170530Ssam sizeof(struct ieee80211_ba_request) 1901170530Ssam ); 1902170530Ssam if (m == NULL) 1903170530Ssam senderr(ENOMEM, is_tx_nobuf); 1904170530Ssam 1905170530Ssam wh = mtod(m, struct ieee80211_frame_min *); 1906170530Ssam wh->i_fc[0] = IEEE80211_FC0_VERSION_0 | 1907170530Ssam IEEE80211_FC0_TYPE_CTL | IEEE80211_FC0_SUBTYPE_BAR; 1908170530Ssam wh->i_fc[1] = 0; 1909170530Ssam IEEE80211_ADDR_COPY(wh->i_addr1, ni->ni_macaddr); 1910178354Ssam IEEE80211_ADDR_COPY(wh->i_addr2, vap->iv_myaddr); 1911170530Ssam 1912170530Ssam tid = WME_AC_TO_TID(tap->txa_ac); 1913170530Ssam barctl = (tap->txa_flags & IEEE80211_AGGR_IMMEDIATE ? 1914170530Ssam IEEE80211_BAPS_POLICY_IMMEDIATE : 1915170530Ssam IEEE80211_BAPS_POLICY_DELAYED) 1916170530Ssam | SM(tid, IEEE80211_BAPS_TID) 1917170530Ssam | SM(tap->txa_wnd, IEEE80211_BAPS_BUFSIZ) 1918170530Ssam ; 1919170530Ssam barseqctl = SM(tap->txa_start, IEEE80211_BASEQ_START) 1920170530Ssam | SM(0, IEEE80211_BASEQ_FRAG) 1921170530Ssam ; 1922170530Ssam ADDSHORT(frm, barctl); 1923170530Ssam ADDSHORT(frm, barseqctl); 1924170530Ssam m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 1925170530Ssam 1926178354Ssam M_WME_SETAC(m, WME_AC_VO); 1927178354Ssam 1928170530Ssam IEEE80211_NODE_STAT(ni, tx_mgmt); /* XXX tx_ctl? */ 1929170530Ssam 1930178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_DUMPPKTS, 1931173273Ssam ni, "send bar frame (tid %u start %u) on channel %u", 1932173273Ssam tid, tap->txa_start, ieee80211_chan2ieee(ic, ic->ic_curchan)); 1933170530Ssam 1934178354Ssam return ic->ic_raw_xmit(ni, m, NULL); 1935170530Ssambad: 1936170530Ssam ieee80211_free_node(ni); 1937170530Ssam return ret; 1938170530Ssam#undef ADDSHORT 1939170530Ssam#undef senderr 1940170530Ssam} 1941170530Ssam 1942170530Ssam/* 1943170530Ssam * Send an action management frame. The arguments are stuff 1944170530Ssam * into a frame without inspection; the caller is assumed to 1945170530Ssam * prepare them carefully (e.g. based on the aggregation state). 1946170530Ssam */ 1947170530Ssamint 1948170530Ssamieee80211_send_action(struct ieee80211_node *ni, 1949170530Ssam int category, int action, uint16_t args[4]) 1950170530Ssam{ 1951178354Ssam#define senderr(_x, _v) do { vap->iv_stats._v++; ret = _x; goto bad; } while (0) 1952170530Ssam#define ADDSHORT(frm, v) do { \ 1953170530Ssam frm[0] = (v) & 0xff; \ 1954170530Ssam frm[1] = (v) >> 8; \ 1955170530Ssam frm += 2; \ 1956170530Ssam} while (0) 1957178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1958170530Ssam struct ieee80211com *ic = ni->ni_ic; 1959170530Ssam struct mbuf *m; 1960170530Ssam uint8_t *frm; 1961170530Ssam uint16_t baparamset; 1962170530Ssam int ret; 1963170530Ssam 1964170530Ssam KASSERT(ni != NULL, ("null node")); 1965170530Ssam 1966170530Ssam /* 1967170530Ssam * Hold a reference on the node so it doesn't go away until after 1968170530Ssam * the xmit is complete all the way in the driver. On error we 1969170530Ssam * will remove our reference. 1970170530Ssam */ 1971178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_NODE, 1972170530Ssam "ieee80211_ref_node (%s:%u) %p<%s> refcnt %d\n", 1973170530Ssam __func__, __LINE__, 1974170530Ssam ni, ether_sprintf(ni->ni_macaddr), 1975170530Ssam ieee80211_node_refcnt(ni)+1); 1976170530Ssam ieee80211_ref_node(ni); 1977170530Ssam 1978170530Ssam m = ieee80211_getmgtframe(&frm, 1979170530Ssam ic->ic_headroom + sizeof(struct ieee80211_frame), 1980170530Ssam sizeof(uint16_t) /* action+category */ 1981170530Ssam /* XXX may action payload */ 1982170530Ssam + sizeof(struct ieee80211_action_ba_addbaresponse) 1983170530Ssam ); 1984170530Ssam if (m == NULL) 1985170530Ssam senderr(ENOMEM, is_tx_nobuf); 1986170530Ssam 1987170530Ssam *frm++ = category; 1988170530Ssam *frm++ = action; 1989170530Ssam switch (category) { 1990170530Ssam case IEEE80211_ACTION_CAT_BA: 1991170530Ssam switch (action) { 1992170530Ssam case IEEE80211_ACTION_BA_ADDBA_REQUEST: 1993178354Ssam IEEE80211_NOTE(vap, 1994170530Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 1995173273Ssam "send ADDBA request: dialogtoken %d " 1996173273Ssam "baparamset 0x%x (tid %d) batimeout 0x%x baseqctl 0x%x", 1997173273Ssam args[0], args[1], MS(args[1], IEEE80211_BAPS_TID), 1998173273Ssam args[2], args[3]); 1999170530Ssam 2000170530Ssam *frm++ = args[0]; /* dialog token */ 2001170530Ssam ADDSHORT(frm, args[1]); /* baparamset */ 2002170530Ssam ADDSHORT(frm, args[2]); /* batimeout */ 2003170530Ssam ADDSHORT(frm, args[3]); /* baseqctl */ 2004170530Ssam break; 2005170530Ssam case IEEE80211_ACTION_BA_ADDBA_RESPONSE: 2006178354Ssam IEEE80211_NOTE(vap, 2007170530Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 2008170530Ssam "send ADDBA response: dialogtoken %d status %d " 2009170530Ssam "baparamset 0x%x (tid %d) batimeout %d", 2010170530Ssam args[0], args[1], args[2], 2011170530Ssam MS(args[2], IEEE80211_BAPS_TID), args[3]); 2012170530Ssam 2013170530Ssam *frm++ = args[0]; /* dialog token */ 2014170530Ssam ADDSHORT(frm, args[1]); /* statuscode */ 2015170530Ssam ADDSHORT(frm, args[2]); /* baparamset */ 2016170530Ssam ADDSHORT(frm, args[3]); /* batimeout */ 2017170530Ssam break; 2018170530Ssam case IEEE80211_ACTION_BA_DELBA: 2019170530Ssam /* XXX */ 2020170530Ssam baparamset = SM(args[0], IEEE80211_DELBAPS_TID) 2021180309Ssam | args[1] 2022170530Ssam ; 2023170530Ssam ADDSHORT(frm, baparamset); 2024170530Ssam ADDSHORT(frm, args[2]); /* reason code */ 2025170530Ssam 2026178354Ssam IEEE80211_NOTE(vap, 2027170530Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 2028170530Ssam "send DELBA action: tid %d, initiator %d reason %d", 2029170530Ssam args[0], args[1], args[2]); 2030170530Ssam break; 2031170530Ssam default: 2032170530Ssam goto badaction; 2033170530Ssam } 2034170530Ssam break; 2035170530Ssam case IEEE80211_ACTION_CAT_HT: 2036170530Ssam switch (action) { 2037170530Ssam case IEEE80211_ACTION_HT_TXCHWIDTH: 2038178354Ssam IEEE80211_NOTE(vap, 2039170530Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, 2040170530Ssam ni, "send HT txchwidth: width %d", 2041178354Ssam IEEE80211_IS_CHAN_HT40(ni->ni_chan) ? 40 : 20 2042170530Ssam ); 2043178354Ssam *frm++ = IEEE80211_IS_CHAN_HT40(ni->ni_chan) ? 2044170530Ssam IEEE80211_A_HT_TXCHWIDTH_2040 : 2045170530Ssam IEEE80211_A_HT_TXCHWIDTH_20; 2046170530Ssam break; 2047170530Ssam default: 2048170530Ssam goto badaction; 2049170530Ssam } 2050170530Ssam break; 2051170530Ssam default: 2052170530Ssam badaction: 2053178354Ssam IEEE80211_NOTE(vap, 2054170530Ssam IEEE80211_MSG_ACTION | IEEE80211_MSG_11N, ni, 2055170530Ssam "%s: unsupported category %d action %d", __func__, 2056170530Ssam category, action); 2057170530Ssam senderr(EINVAL, is_tx_unknownmgt); 2058170530Ssam /* NOTREACHED */ 2059170530Ssam } 2060170530Ssam m->m_pkthdr.len = m->m_len = frm - mtod(m, uint8_t *); 2061170530Ssam 2062178354Ssam return ieee80211_mgmt_output(ni, m, IEEE80211_FC0_SUBTYPE_ACTION); 2063170530Ssambad: 2064170530Ssam ieee80211_free_node(ni); 2065178354Ssam if (m != NULL) 2066178354Ssam m_freem(m); 2067170530Ssam return ret; 2068170530Ssam#undef ADDSHORT 2069170530Ssam#undef senderr 2070170530Ssam} 2071170530Ssam 2072170530Ssam/* 2073170530Ssam * Construct the MCS bit mask for inclusion 2074170530Ssam * in an HT information element. 2075170530Ssam */ 2076170530Ssamstatic void 2077170530Ssamieee80211_set_htrates(uint8_t *frm, const struct ieee80211_htrateset *rs) 2078170530Ssam{ 2079170530Ssam int i; 2080170530Ssam 2081170530Ssam for (i = 0; i < rs->rs_nrates; i++) { 2082170530Ssam int r = rs->rs_rates[i] & IEEE80211_RATE_VAL; 2083170530Ssam if (r < IEEE80211_HTRATE_MAXSIZE) { /* XXX? */ 2084170530Ssam /* NB: this assumes a particular implementation */ 2085170530Ssam setbit(frm, r); 2086170530Ssam } 2087170530Ssam } 2088170530Ssam} 2089170530Ssam 2090170530Ssam/* 2091170530Ssam * Add body of an HTCAP information element. 2092170530Ssam */ 2093170530Ssamstatic uint8_t * 2094170530Ssamieee80211_add_htcap_body(uint8_t *frm, struct ieee80211_node *ni) 2095170530Ssam{ 2096170530Ssam#define ADDSHORT(frm, v) do { \ 2097170530Ssam frm[0] = (v) & 0xff; \ 2098170530Ssam frm[1] = (v) >> 8; \ 2099170530Ssam frm += 2; \ 2100170530Ssam} while (0) 2101178354Ssam struct ieee80211vap *vap = ni->ni_vap; 2102170530Ssam uint16_t caps; 2103173865Ssam int rxmax, density; 2104170530Ssam 2105170530Ssam /* HT capabilities */ 2106178354Ssam caps = vap->iv_htcaps & 0xffff; 2107173273Ssam /* 2108173273Ssam * Note channel width depends on whether we are operating as 2109173273Ssam * a sta or not. When operating as a sta we are generating 2110173273Ssam * a request based on our desired configuration. Otherwise 2111173273Ssam * we are operational and the channel attributes identify 2112173273Ssam * how we've been setup (which might be different if a fixed 2113173273Ssam * channel is specified). 2114173273Ssam */ 2115178354Ssam if (vap->iv_opmode == IEEE80211_M_STA) { 2116173273Ssam /* override 20/40 use based on config */ 2117178354Ssam if (vap->iv_flags_ext & IEEE80211_FEXT_USEHT40) 2118173273Ssam caps |= IEEE80211_HTCAP_CHWIDTH40; 2119173273Ssam else 2120173273Ssam caps &= ~IEEE80211_HTCAP_CHWIDTH40; 2121173865Ssam /* use advertised setting (XXX locally constraint) */ 2122173865Ssam rxmax = MS(ni->ni_htparam, IEEE80211_HTCAP_MAXRXAMPDU); 2123173865Ssam density = MS(ni->ni_htparam, IEEE80211_HTCAP_MPDUDENSITY); 2124173273Ssam } else { 2125173273Ssam /* override 20/40 use based on current channel */ 2126178354Ssam if (IEEE80211_IS_CHAN_HT40(ni->ni_chan)) 2127173273Ssam caps |= IEEE80211_HTCAP_CHWIDTH40; 2128173273Ssam else 2129173273Ssam caps &= ~IEEE80211_HTCAP_CHWIDTH40; 2130178354Ssam rxmax = vap->iv_ampdu_rxmax; 2131178354Ssam density = vap->iv_ampdu_density; 2132173273Ssam } 2133170530Ssam /* adjust short GI based on channel and config */ 2134178354Ssam if ((vap->iv_flags_ext & IEEE80211_FEXT_SHORTGI20) == 0) 2135170530Ssam caps &= ~IEEE80211_HTCAP_SHORTGI20; 2136178354Ssam if ((vap->iv_flags_ext & IEEE80211_FEXT_SHORTGI40) == 0 || 2137170530Ssam (caps & IEEE80211_HTCAP_CHWIDTH40) == 0) 2138170530Ssam caps &= ~IEEE80211_HTCAP_SHORTGI40; 2139170530Ssam ADDSHORT(frm, caps); 2140170530Ssam 2141170530Ssam /* HT parameters */ 2142173865Ssam *frm = SM(rxmax, IEEE80211_HTCAP_MAXRXAMPDU) 2143173865Ssam | SM(density, IEEE80211_HTCAP_MPDUDENSITY) 2144173273Ssam ; 2145170530Ssam frm++; 2146170530Ssam 2147170530Ssam /* pre-zero remainder of ie */ 2148170530Ssam memset(frm, 0, sizeof(struct ieee80211_ie_htcap) - 2149170530Ssam __offsetof(struct ieee80211_ie_htcap, hc_mcsset)); 2150170530Ssam 2151170530Ssam /* supported MCS set */ 2152173273Ssam /* 2153173273Ssam * XXX it would better to get the rate set from ni_htrates 2154173273Ssam * so we can restrict it but for sta mode ni_htrates isn't 2155173273Ssam * setup when we're called to form an AssocReq frame so for 2156173273Ssam * now we're restricted to the default HT rate set. 2157173273Ssam */ 2158173273Ssam ieee80211_set_htrates(frm, &ieee80211_rateset_11n); 2159170530Ssam 2160170530Ssam frm += sizeof(struct ieee80211_ie_htcap) - 2161170530Ssam __offsetof(struct ieee80211_ie_htcap, hc_mcsset); 2162170530Ssam return frm; 2163170530Ssam#undef ADDSHORT 2164170530Ssam} 2165170530Ssam 2166170530Ssam/* 2167170530Ssam * Add 802.11n HT capabilities information element 2168170530Ssam */ 2169170530Ssamuint8_t * 2170170530Ssamieee80211_add_htcap(uint8_t *frm, struct ieee80211_node *ni) 2171170530Ssam{ 2172170530Ssam frm[0] = IEEE80211_ELEMID_HTCAP; 2173170530Ssam frm[1] = sizeof(struct ieee80211_ie_htcap) - 2; 2174170530Ssam return ieee80211_add_htcap_body(frm + 2, ni); 2175170530Ssam} 2176170530Ssam 2177170530Ssam/* 2178170530Ssam * Add Broadcom OUI wrapped standard HTCAP ie; this is 2179170530Ssam * used for compatibility w/ pre-draft implementations. 2180170530Ssam */ 2181170530Ssamuint8_t * 2182170530Ssamieee80211_add_htcap_vendor(uint8_t *frm, struct ieee80211_node *ni) 2183170530Ssam{ 2184170530Ssam frm[0] = IEEE80211_ELEMID_VENDOR; 2185170530Ssam frm[1] = 4 + sizeof(struct ieee80211_ie_htcap) - 2; 2186170530Ssam frm[2] = (BCM_OUI >> 0) & 0xff; 2187170530Ssam frm[3] = (BCM_OUI >> 8) & 0xff; 2188170530Ssam frm[4] = (BCM_OUI >> 16) & 0xff; 2189170530Ssam frm[5] = BCM_OUI_HTCAP; 2190170530Ssam return ieee80211_add_htcap_body(frm + 6, ni); 2191170530Ssam} 2192170530Ssam 2193170530Ssam/* 2194170530Ssam * Construct the MCS bit mask of basic rates 2195170530Ssam * for inclusion in an HT information element. 2196170530Ssam */ 2197170530Ssamstatic void 2198170530Ssamieee80211_set_basic_htrates(uint8_t *frm, const struct ieee80211_htrateset *rs) 2199170530Ssam{ 2200170530Ssam int i; 2201170530Ssam 2202170530Ssam for (i = 0; i < rs->rs_nrates; i++) { 2203170530Ssam int r = rs->rs_rates[i] & IEEE80211_RATE_VAL; 2204170530Ssam if ((rs->rs_rates[i] & IEEE80211_RATE_BASIC) && 2205170530Ssam r < IEEE80211_HTRATE_MAXSIZE) { 2206170530Ssam /* NB: this assumes a particular implementation */ 2207170530Ssam setbit(frm, r); 2208170530Ssam } 2209170530Ssam } 2210170530Ssam} 2211170530Ssam 2212170530Ssam/* 2213172211Ssam * Update the HTINFO ie for a beacon frame. 2214172211Ssam */ 2215172211Ssamvoid 2216178354Ssamieee80211_ht_update_beacon(struct ieee80211vap *vap, 2217172211Ssam struct ieee80211_beacon_offsets *bo) 2218172211Ssam{ 2219172211Ssam#define PROTMODE (IEEE80211_HTINFO_OPMODE|IEEE80211_HTINFO_NONHT_PRESENT) 2220178354Ssam const struct ieee80211_channel *bsschan = vap->iv_bss->ni_chan; 2221178354Ssam struct ieee80211com *ic = vap->iv_ic; 2222172211Ssam struct ieee80211_ie_htinfo *ht = 2223172211Ssam (struct ieee80211_ie_htinfo *) bo->bo_htinfo; 2224172211Ssam 2225172211Ssam /* XXX only update on channel change */ 2226178354Ssam ht->hi_ctrlchannel = ieee80211_chan2ieee(ic, bsschan); 2227183256Ssam if (vap->iv_flags_ext & IEEE80211_FEXT_RIFS) 2228183256Ssam ht->hi_byte1 = IEEE80211_HTINFO_RIFSMODE_PERM; 2229183256Ssam else 2230183256Ssam ht->hi_byte1 = IEEE80211_HTINFO_RIFSMODE_PROH; 2231178354Ssam if (IEEE80211_IS_CHAN_HT40U(bsschan)) 2232172211Ssam ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_ABOVE; 2233178354Ssam else if (IEEE80211_IS_CHAN_HT40D(bsschan)) 2234172211Ssam ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_BELOW; 2235172211Ssam else 2236172211Ssam ht->hi_byte1 |= IEEE80211_HTINFO_2NDCHAN_NONE; 2237178354Ssam if (IEEE80211_IS_CHAN_HT40(bsschan)) 2238172211Ssam ht->hi_byte1 |= IEEE80211_HTINFO_TXWIDTH_2040; 2239172211Ssam 2240172211Ssam /* protection mode */ 2241172211Ssam ht->hi_byte2 = (ht->hi_byte2 &~ PROTMODE) | ic->ic_curhtprotmode; 2242172211Ssam 2243172211Ssam /* XXX propagate to vendor ie's */ 2244172211Ssam#undef PROTMODE 2245172211Ssam} 2246172211Ssam 2247172211Ssam/* 2248170530Ssam * Add body of an HTINFO information element. 2249173273Ssam * 2250173273Ssam * NB: We don't use struct ieee80211_ie_htinfo because we can 2251173273Ssam * be called to fillin both a standard ie and a compat ie that 2252173273Ssam * has a vendor OUI at the front. 2253170530Ssam */ 2254170530Ssamstatic uint8_t * 2255170530Ssamieee80211_add_htinfo_body(uint8_t *frm, struct ieee80211_node *ni) 2256170530Ssam{ 2257183256Ssam struct ieee80211vap *vap = ni->ni_vap; 2258170530Ssam struct ieee80211com *ic = ni->ni_ic; 2259170530Ssam 2260170530Ssam /* pre-zero remainder of ie */ 2261170530Ssam memset(frm, 0, sizeof(struct ieee80211_ie_htinfo) - 2); 2262170530Ssam 2263170530Ssam /* primary/control channel center */ 2264178354Ssam *frm++ = ieee80211_chan2ieee(ic, ni->ni_chan); 2265170530Ssam 2266183256Ssam if (vap->iv_flags_ext & IEEE80211_FEXT_RIFS) 2267183256Ssam frm[0] = IEEE80211_HTINFO_RIFSMODE_PERM; 2268183256Ssam else 2269183256Ssam frm[0] = IEEE80211_HTINFO_RIFSMODE_PROH; 2270178354Ssam if (IEEE80211_IS_CHAN_HT40U(ni->ni_chan)) 2271170530Ssam frm[0] |= IEEE80211_HTINFO_2NDCHAN_ABOVE; 2272178354Ssam else if (IEEE80211_IS_CHAN_HT40D(ni->ni_chan)) 2273170530Ssam frm[0] |= IEEE80211_HTINFO_2NDCHAN_BELOW; 2274170530Ssam else 2275170530Ssam frm[0] |= IEEE80211_HTINFO_2NDCHAN_NONE; 2276178354Ssam if (IEEE80211_IS_CHAN_HT40(ni->ni_chan)) 2277170530Ssam frm[0] |= IEEE80211_HTINFO_TXWIDTH_2040; 2278170530Ssam 2279172211Ssam frm[1] = ic->ic_curhtprotmode; 2280170530Ssam 2281170530Ssam frm += 5; 2282170530Ssam 2283170530Ssam /* basic MCS set */ 2284170530Ssam ieee80211_set_basic_htrates(frm, &ni->ni_htrates); 2285170530Ssam frm += sizeof(struct ieee80211_ie_htinfo) - 2286170530Ssam __offsetof(struct ieee80211_ie_htinfo, hi_basicmcsset); 2287170530Ssam return frm; 2288170530Ssam} 2289170530Ssam 2290170530Ssam/* 2291170530Ssam * Add 802.11n HT information information element. 2292170530Ssam */ 2293170530Ssamuint8_t * 2294170530Ssamieee80211_add_htinfo(uint8_t *frm, struct ieee80211_node *ni) 2295170530Ssam{ 2296170530Ssam frm[0] = IEEE80211_ELEMID_HTINFO; 2297170530Ssam frm[1] = sizeof(struct ieee80211_ie_htinfo) - 2; 2298170530Ssam return ieee80211_add_htinfo_body(frm + 2, ni); 2299170530Ssam} 2300170530Ssam 2301170530Ssam/* 2302170530Ssam * Add Broadcom OUI wrapped standard HTINFO ie; this is 2303170530Ssam * used for compatibility w/ pre-draft implementations. 2304170530Ssam */ 2305170530Ssamuint8_t * 2306170530Ssamieee80211_add_htinfo_vendor(uint8_t *frm, struct ieee80211_node *ni) 2307170530Ssam{ 2308170530Ssam frm[0] = IEEE80211_ELEMID_VENDOR; 2309170530Ssam frm[1] = 4 + sizeof(struct ieee80211_ie_htinfo) - 2; 2310170530Ssam frm[2] = (BCM_OUI >> 0) & 0xff; 2311170530Ssam frm[3] = (BCM_OUI >> 8) & 0xff; 2312170530Ssam frm[4] = (BCM_OUI >> 16) & 0xff; 2313170530Ssam frm[5] = BCM_OUI_HTINFO; 2314170530Ssam return ieee80211_add_htinfo_body(frm + 6, ni); 2315170530Ssam} 2316