ieee80211_sta.c revision 283538
1178354Ssam/*- 2178354Ssam * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting 3178354Ssam * All rights reserved. 4178354Ssam * 5178354Ssam * Redistribution and use in source and binary forms, with or without 6178354Ssam * modification, are permitted provided that the following conditions 7178354Ssam * are met: 8178354Ssam * 1. Redistributions of source code must retain the above copyright 9178354Ssam * notice, this list of conditions and the following disclaimer. 10178354Ssam * 2. Redistributions in binary form must reproduce the above copyright 11178354Ssam * notice, this list of conditions and the following disclaimer in the 12178354Ssam * documentation and/or other materials provided with the distribution. 13178354Ssam * 14178354Ssam * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15178354Ssam * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16178354Ssam * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17178354Ssam * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18178354Ssam * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19178354Ssam * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20178354Ssam * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21178354Ssam * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22178354Ssam * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23178354Ssam * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24178354Ssam */ 25178354Ssam 26178354Ssam#include <sys/cdefs.h> 27178354Ssam#ifdef __FreeBSD__ 28178354Ssam__FBSDID("$FreeBSD: head/sys/net80211/ieee80211_sta.c 283538 2015-05-25 19:18:16Z adrian $"); 29178354Ssam#endif 30178354Ssam 31178354Ssam/* 32178354Ssam * IEEE 802.11 Station mode support. 33178354Ssam */ 34178354Ssam#include "opt_inet.h" 35178354Ssam#include "opt_wlan.h" 36178354Ssam 37178354Ssam#include <sys/param.h> 38178354Ssam#include <sys/systm.h> 39178354Ssam#include <sys/mbuf.h> 40178354Ssam#include <sys/malloc.h> 41178354Ssam#include <sys/kernel.h> 42178354Ssam 43178354Ssam#include <sys/socket.h> 44178354Ssam#include <sys/sockio.h> 45178354Ssam#include <sys/endian.h> 46178354Ssam#include <sys/errno.h> 47178354Ssam#include <sys/proc.h> 48178354Ssam#include <sys/sysctl.h> 49178354Ssam 50178354Ssam#include <net/if.h> 51178354Ssam#include <net/if_media.h> 52178354Ssam#include <net/if_llc.h> 53227339Sadrian#include <net/if_dl.h> 54227339Sadrian#include <net/if_var.h> 55178354Ssam#include <net/ethernet.h> 56178354Ssam 57178354Ssam#include <net/bpf.h> 58178354Ssam 59178354Ssam#include <net80211/ieee80211_var.h> 60178354Ssam#include <net80211/ieee80211_sta.h> 61178354Ssam#include <net80211/ieee80211_input.h> 62190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 63190391Ssam#include <net80211/ieee80211_superg.h> 64190391Ssam#endif 65211295Sbschmidt#include <net80211/ieee80211_ratectl.h> 66244060Sadrian#include <net80211/ieee80211_sta.h> 67178354Ssam 68178354Ssam#define IEEE80211_RATE2MBS(r) (((r) & IEEE80211_RATE_VAL) / 2) 69178354Ssam 70178354Ssamstatic void sta_vattach(struct ieee80211vap *); 71178354Ssamstatic void sta_beacon_miss(struct ieee80211vap *); 72178354Ssamstatic int sta_newstate(struct ieee80211vap *, enum ieee80211_state, int); 73283535Sadrianstatic int sta_input(struct ieee80211_node *, struct mbuf *, 74283535Sadrian const struct ieee80211_rx_stats *, int, int); 75178354Ssamstatic void sta_recv_mgmt(struct ieee80211_node *, struct mbuf *, 76283535Sadrian int subtype, const struct ieee80211_rx_stats *, int rssi, int nf); 77191546Ssamstatic void sta_recv_ctl(struct ieee80211_node *, struct mbuf *, int subtype); 78178354Ssam 79178354Ssamvoid 80178354Ssamieee80211_sta_attach(struct ieee80211com *ic) 81178354Ssam{ 82178354Ssam ic->ic_vattach[IEEE80211_M_STA] = sta_vattach; 83178354Ssam} 84178354Ssam 85178354Ssamvoid 86178354Ssamieee80211_sta_detach(struct ieee80211com *ic) 87178354Ssam{ 88178354Ssam} 89178354Ssam 90178354Ssamstatic void 91178354Ssamsta_vdetach(struct ieee80211vap *vap) 92178354Ssam{ 93178354Ssam} 94178354Ssam 95178354Ssamstatic void 96178354Ssamsta_vattach(struct ieee80211vap *vap) 97178354Ssam{ 98178354Ssam vap->iv_newstate = sta_newstate; 99178354Ssam vap->iv_input = sta_input; 100178354Ssam vap->iv_recv_mgmt = sta_recv_mgmt; 101191546Ssam vap->iv_recv_ctl = sta_recv_ctl; 102178354Ssam vap->iv_opdetach = sta_vdetach; 103178354Ssam vap->iv_bmiss = sta_beacon_miss; 104178354Ssam} 105178354Ssam 106178354Ssam/* 107178354Ssam * Handle a beacon miss event. The common code filters out 108178354Ssam * spurious events that can happen when scanning and/or before 109178354Ssam * reaching RUN state. 110178354Ssam */ 111178354Ssamstatic void 112178354Ssamsta_beacon_miss(struct ieee80211vap *vap) 113178354Ssam{ 114193439Ssam struct ieee80211com *ic = vap->iv_ic; 115178354Ssam 116225913Sadrian IEEE80211_LOCK_ASSERT(ic); 117225913Sadrian 118193439Ssam KASSERT((ic->ic_flags & IEEE80211_F_SCAN) == 0, ("scanning")); 119193439Ssam KASSERT(vap->iv_state >= IEEE80211_S_RUN, 120193439Ssam ("wrong state %s", ieee80211_state_name[vap->iv_state])); 121178354Ssam 122193439Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 123193439Ssam "beacon miss, mode %s state %s\n", 124193439Ssam ieee80211_opmode_name[vap->iv_opmode], 125193439Ssam ieee80211_state_name[vap->iv_state]); 126193439Ssam 127193439Ssam if (vap->iv_state == IEEE80211_S_CSA) { 128193439Ssam /* 129193439Ssam * A Channel Switch is pending; assume we missed the 130193439Ssam * beacon that would've completed the process and just 131193439Ssam * force the switch. If we made a mistake we'll not 132193439Ssam * find the AP on the new channel and fall back to a 133193439Ssam * normal scan. 134193439Ssam */ 135193439Ssam ieee80211_csa_completeswitch(ic); 136193439Ssam return; 137193439Ssam } 138178354Ssam if (++vap->iv_bmiss_count < vap->iv_bmiss_max) { 139178354Ssam /* 140178354Ssam * Send a directed probe req before falling back to a 141178354Ssam * scan; if we receive a response ic_bmiss_count will 142178354Ssam * be reset. Some cards mistakenly report beacon miss 143178354Ssam * so this avoids the expensive scan if the ap is 144178354Ssam * still there. 145178354Ssam */ 146178354Ssam ieee80211_send_probereq(vap->iv_bss, vap->iv_myaddr, 147178354Ssam vap->iv_bss->ni_bssid, vap->iv_bss->ni_bssid, 148178354Ssam vap->iv_bss->ni_essid, vap->iv_bss->ni_esslen); 149178354Ssam return; 150178354Ssam } 151205140Sweongyo 152205140Sweongyo callout_stop(&vap->iv_swbmiss); 153178354Ssam vap->iv_bmiss_count = 0; 154178354Ssam vap->iv_stats.is_beacon_miss++; 155178354Ssam if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { 156190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 157190402Ssam struct ieee80211com *ic = vap->iv_ic; 158190402Ssam 159178354Ssam /* 160178354Ssam * If we receive a beacon miss interrupt when using 161178354Ssam * dynamic turbo, attempt to switch modes before 162178354Ssam * reassociating. 163178354Ssam */ 164178354Ssam if (IEEE80211_ATH_CAP(vap, vap->iv_bss, IEEE80211_NODE_TURBOP)) 165178354Ssam ieee80211_dturbo_switch(vap, 166178354Ssam ic->ic_bsschan->ic_flags ^ IEEE80211_CHAN_TURBO); 167190391Ssam#endif 168178354Ssam /* 169178354Ssam * Try to reassociate before scanning for a new ap. 170178354Ssam */ 171178354Ssam ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 172178354Ssam } else { 173178354Ssam /* 174178354Ssam * Somebody else is controlling state changes (e.g. 175178354Ssam * a user-mode app) don't do anything that would 176178354Ssam * confuse them; just drop into scan mode so they'll 177178354Ssam * notified of the state change and given control. 178178354Ssam */ 179178354Ssam ieee80211_new_state(vap, IEEE80211_S_SCAN, 0); 180178354Ssam } 181178354Ssam} 182178354Ssam 183178354Ssam/* 184178354Ssam * Handle deauth with reason. We retry only for 185178354Ssam * the cases where we might succeed. Otherwise 186178354Ssam * we downgrade the ap and scan. 187178354Ssam */ 188178354Ssamstatic void 189178354Ssamsta_authretry(struct ieee80211vap *vap, struct ieee80211_node *ni, int reason) 190178354Ssam{ 191178354Ssam switch (reason) { 192178354Ssam case IEEE80211_STATUS_SUCCESS: /* NB: MLME assoc */ 193178354Ssam case IEEE80211_STATUS_TIMEOUT: 194178354Ssam case IEEE80211_REASON_ASSOC_EXPIRE: 195178354Ssam case IEEE80211_REASON_NOT_AUTHED: 196178354Ssam case IEEE80211_REASON_NOT_ASSOCED: 197178354Ssam case IEEE80211_REASON_ASSOC_LEAVE: 198178354Ssam case IEEE80211_REASON_ASSOC_NOT_AUTHED: 199178354Ssam IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, 1); 200178354Ssam break; 201178354Ssam default: 202178354Ssam ieee80211_scan_assoc_fail(vap, vap->iv_bss->ni_macaddr, reason); 203178354Ssam if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) 204178354Ssam ieee80211_check_scan_current(vap); 205178354Ssam break; 206178354Ssam } 207178354Ssam} 208178354Ssam 209178354Ssam/* 210178354Ssam * IEEE80211_M_STA vap state machine handler. 211178354Ssam * This routine handles the main states in the 802.11 protocol. 212178354Ssam */ 213178354Ssamstatic int 214178354Ssamsta_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 215178354Ssam{ 216178354Ssam struct ieee80211com *ic = vap->iv_ic; 217178354Ssam struct ieee80211_node *ni; 218178354Ssam enum ieee80211_state ostate; 219178354Ssam 220178354Ssam IEEE80211_LOCK_ASSERT(ic); 221178354Ssam 222178354Ssam ostate = vap->iv_state; 223178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 224178354Ssam __func__, ieee80211_state_name[ostate], 225178354Ssam ieee80211_state_name[nstate], arg); 226178354Ssam vap->iv_state = nstate; /* state transition */ 227178354Ssam callout_stop(&vap->iv_mgtsend); /* XXX callout_drain */ 228178354Ssam if (ostate != IEEE80211_S_SCAN) 229178354Ssam ieee80211_cancel_scan(vap); /* background scan */ 230178354Ssam ni = vap->iv_bss; /* NB: no reference held */ 231178354Ssam if (vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS) 232178354Ssam callout_stop(&vap->iv_swbmiss); 233178354Ssam switch (nstate) { 234178354Ssam case IEEE80211_S_INIT: 235178354Ssam switch (ostate) { 236178354Ssam case IEEE80211_S_SLEEP: 237178354Ssam /* XXX wakeup */ 238264855Sadrian /* XXX driver hook to wakeup the hardware? */ 239178354Ssam case IEEE80211_S_RUN: 240178354Ssam IEEE80211_SEND_MGMT(ni, 241178354Ssam IEEE80211_FC0_SUBTYPE_DISASSOC, 242178354Ssam IEEE80211_REASON_ASSOC_LEAVE); 243178354Ssam ieee80211_sta_leave(ni); 244178354Ssam break; 245178354Ssam case IEEE80211_S_ASSOC: 246178354Ssam IEEE80211_SEND_MGMT(ni, 247178354Ssam IEEE80211_FC0_SUBTYPE_DEAUTH, 248178354Ssam IEEE80211_REASON_AUTH_LEAVE); 249178354Ssam break; 250178354Ssam case IEEE80211_S_SCAN: 251178354Ssam ieee80211_cancel_scan(vap); 252178354Ssam break; 253178354Ssam default: 254178354Ssam goto invalid; 255178354Ssam } 256178354Ssam if (ostate != IEEE80211_S_INIT) { 257178354Ssam /* NB: optimize INIT -> INIT case */ 258178354Ssam ieee80211_reset_bss(vap); 259178354Ssam } 260178354Ssam if (vap->iv_auth->ia_detach != NULL) 261178354Ssam vap->iv_auth->ia_detach(vap); 262178354Ssam break; 263178354Ssam case IEEE80211_S_SCAN: 264178354Ssam switch (ostate) { 265178354Ssam case IEEE80211_S_INIT: 266178354Ssam /* 267178354Ssam * Initiate a scan. We can come here as a result 268178354Ssam * of an IEEE80211_IOC_SCAN_REQ too in which case 269178354Ssam * the vap will be marked with IEEE80211_FEXT_SCANREQ 270178354Ssam * and the scan request parameters will be present 271178354Ssam * in iv_scanreq. Otherwise we do the default. 272178354Ssam */ 273178354Ssam if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 274178354Ssam ieee80211_check_scan(vap, 275178354Ssam vap->iv_scanreq_flags, 276178354Ssam vap->iv_scanreq_duration, 277178354Ssam vap->iv_scanreq_mindwell, 278178354Ssam vap->iv_scanreq_maxdwell, 279178354Ssam vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 280178354Ssam vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 281178354Ssam } else 282178354Ssam ieee80211_check_scan_current(vap); 283178354Ssam break; 284178354Ssam case IEEE80211_S_SCAN: 285178354Ssam case IEEE80211_S_AUTH: 286178354Ssam case IEEE80211_S_ASSOC: 287178354Ssam /* 288178354Ssam * These can happen either because of a timeout 289178354Ssam * on an assoc/auth response or because of a 290178354Ssam * change in state that requires a reset. For 291178354Ssam * the former we're called with a non-zero arg 292178354Ssam * that is the cause for the failure; pass this 293178354Ssam * to the scan code so it can update state. 294178354Ssam * Otherwise trigger a new scan unless we're in 295178354Ssam * manual roaming mode in which case an application 296178354Ssam * must issue an explicit scan request. 297178354Ssam */ 298178354Ssam if (arg != 0) 299178354Ssam ieee80211_scan_assoc_fail(vap, 300178354Ssam vap->iv_bss->ni_macaddr, arg); 301178354Ssam if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) 302178354Ssam ieee80211_check_scan_current(vap); 303178354Ssam break; 304264906Sadrian case IEEE80211_S_SLEEP: /* beacon miss */ 305264906Sadrian /* 306264906Sadrian * XXX if in sleep we need to wakeup the hardware. 307264906Sadrian */ 308264906Sadrian /* FALLTHROUGH */ 309178354Ssam case IEEE80211_S_RUN: /* beacon miss */ 310178354Ssam /* 311178354Ssam * Beacon miss. Notify user space and if not 312178354Ssam * under control of a user application (roaming 313178354Ssam * manual) kick off a scan to re-connect. 314178354Ssam */ 315264906Sadrian 316178354Ssam ieee80211_sta_leave(ni); 317178354Ssam if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) 318178354Ssam ieee80211_check_scan_current(vap); 319178354Ssam break; 320178354Ssam default: 321178354Ssam goto invalid; 322178354Ssam } 323178354Ssam break; 324178354Ssam case IEEE80211_S_AUTH: 325178354Ssam switch (ostate) { 326178354Ssam case IEEE80211_S_INIT: 327178354Ssam case IEEE80211_S_SCAN: 328178354Ssam IEEE80211_SEND_MGMT(ni, 329178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 1); 330178354Ssam break; 331178354Ssam case IEEE80211_S_AUTH: 332178354Ssam case IEEE80211_S_ASSOC: 333178354Ssam switch (arg & 0xff) { 334178354Ssam case IEEE80211_FC0_SUBTYPE_AUTH: 335178354Ssam /* ??? */ 336178354Ssam IEEE80211_SEND_MGMT(ni, 337178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 2); 338178354Ssam break; 339178354Ssam case IEEE80211_FC0_SUBTYPE_DEAUTH: 340178354Ssam sta_authretry(vap, ni, arg>>8); 341178354Ssam break; 342178354Ssam } 343178354Ssam break; 344178354Ssam case IEEE80211_S_RUN: 345178354Ssam switch (arg & 0xff) { 346178354Ssam case IEEE80211_FC0_SUBTYPE_AUTH: 347178354Ssam IEEE80211_SEND_MGMT(ni, 348178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 2); 349178354Ssam vap->iv_state = ostate; /* stay RUN */ 350178354Ssam break; 351178354Ssam case IEEE80211_FC0_SUBTYPE_DEAUTH: 352178354Ssam ieee80211_sta_leave(ni); 353178354Ssam if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { 354178354Ssam /* try to reauth */ 355178354Ssam IEEE80211_SEND_MGMT(ni, 356178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 1); 357178354Ssam } 358178354Ssam break; 359178354Ssam } 360178354Ssam break; 361178354Ssam default: 362178354Ssam goto invalid; 363178354Ssam } 364178354Ssam break; 365178354Ssam case IEEE80211_S_ASSOC: 366178354Ssam switch (ostate) { 367178354Ssam case IEEE80211_S_AUTH: 368178354Ssam case IEEE80211_S_ASSOC: 369178354Ssam IEEE80211_SEND_MGMT(ni, 370178354Ssam IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0); 371178354Ssam break; 372178354Ssam case IEEE80211_S_SLEEP: /* cannot happen */ 373178354Ssam case IEEE80211_S_RUN: 374178354Ssam ieee80211_sta_leave(ni); 375178354Ssam if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { 376178354Ssam IEEE80211_SEND_MGMT(ni, arg ? 377178354Ssam IEEE80211_FC0_SUBTYPE_REASSOC_REQ : 378178354Ssam IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0); 379178354Ssam } 380178354Ssam break; 381178354Ssam default: 382178354Ssam goto invalid; 383178354Ssam } 384178354Ssam break; 385178354Ssam case IEEE80211_S_RUN: 386178354Ssam if (vap->iv_flags & IEEE80211_F_WPA) { 387178354Ssam /* XXX validate prerequisites */ 388178354Ssam } 389178354Ssam switch (ostate) { 390178354Ssam case IEEE80211_S_RUN: 391193439Ssam case IEEE80211_S_CSA: 392178354Ssam break; 393178354Ssam case IEEE80211_S_AUTH: /* when join is done in fw */ 394178354Ssam case IEEE80211_S_ASSOC: 395178354Ssam#ifdef IEEE80211_DEBUG 396178354Ssam if (ieee80211_msg_debug(vap)) { 397178354Ssam ieee80211_note(vap, "%s with %s ssid ", 398178354Ssam (vap->iv_opmode == IEEE80211_M_STA ? 399178354Ssam "associated" : "synchronized"), 400178354Ssam ether_sprintf(ni->ni_bssid)); 401178354Ssam ieee80211_print_essid(vap->iv_bss->ni_essid, 402178354Ssam ni->ni_esslen); 403178354Ssam /* XXX MCS/HT */ 404178354Ssam printf(" channel %d start %uMb\n", 405178354Ssam ieee80211_chan2ieee(ic, ic->ic_curchan), 406178354Ssam IEEE80211_RATE2MBS(ni->ni_txrate)); 407178354Ssam } 408178354Ssam#endif 409178354Ssam ieee80211_scan_assoc_success(vap, ni->ni_macaddr); 410178354Ssam ieee80211_notify_node_join(ni, 411178354Ssam arg == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 412178354Ssam break; 413178354Ssam case IEEE80211_S_SLEEP: 414264855Sadrian /* Wake up from sleep */ 415241138Sadrian vap->iv_sta_ps(vap, 0); 416178354Ssam break; 417178354Ssam default: 418178354Ssam goto invalid; 419178354Ssam } 420178354Ssam ieee80211_sync_curchan(ic); 421178354Ssam if (ostate != IEEE80211_S_RUN && 422178354Ssam (vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS)) { 423178354Ssam /* 424178354Ssam * Start s/w beacon miss timer for devices w/o 425178354Ssam * hardware support. We fudge a bit here since 426178354Ssam * we're doing this in software. 427178354Ssam */ 428178354Ssam vap->iv_swbmiss_period = IEEE80211_TU_TO_TICKS( 429178354Ssam 2 * vap->iv_bmissthreshold * ni->ni_intval); 430178354Ssam vap->iv_swbmiss_count = 0; 431178354Ssam callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period, 432178354Ssam ieee80211_swbmiss, vap); 433178354Ssam } 434178354Ssam /* 435178354Ssam * When 802.1x is not in use mark the port authorized 436178354Ssam * at this point so traffic can flow. 437178354Ssam */ 438178354Ssam if (ni->ni_authmode != IEEE80211_AUTH_8021X) 439178354Ssam ieee80211_node_authorize(ni); 440184345Ssam /* 441184345Ssam * Fake association when joining an existing bss. 442264855Sadrian * 443264855Sadrian * Don't do this if we're doing SLEEP->RUN. 444184345Ssam */ 445264855Sadrian if (ic->ic_newassoc != NULL && ostate != IEEE80211_S_SLEEP) 446264855Sadrian ic->ic_newassoc(vap->iv_bss, (ostate != IEEE80211_S_RUN)); 447178354Ssam break; 448193439Ssam case IEEE80211_S_CSA: 449193439Ssam if (ostate != IEEE80211_S_RUN) 450193439Ssam goto invalid; 451193439Ssam break; 452178354Ssam case IEEE80211_S_SLEEP: 453241138Sadrian vap->iv_sta_ps(vap, 1); 454178354Ssam break; 455178354Ssam default: 456178354Ssam invalid: 457184268Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 458184268Ssam "%s: unexpected state transition %s -> %s\n", __func__, 459178354Ssam ieee80211_state_name[ostate], ieee80211_state_name[nstate]); 460178354Ssam break; 461178354Ssam } 462178354Ssam return 0; 463178354Ssam} 464178354Ssam 465178354Ssam/* 466178354Ssam * Return non-zero if the frame is an echo of a multicast 467178354Ssam * frame sent by ourself. The dir is known to be DSTODS. 468178354Ssam */ 469178354Ssamstatic __inline int 470178354Ssamisdstods_mcastecho(struct ieee80211vap *vap, const struct ieee80211_frame *wh) 471178354Ssam{ 472178354Ssam#define QWH4(wh) ((const struct ieee80211_qosframe_addr4 *)wh) 473178354Ssam#define WH4(wh) ((const struct ieee80211_frame_addr4 *)wh) 474178354Ssam const uint8_t *sa; 475178354Ssam 476178354Ssam KASSERT(vap->iv_opmode == IEEE80211_M_STA, ("wrong mode")); 477178354Ssam 478178354Ssam if (!IEEE80211_IS_MULTICAST(wh->i_addr3)) 479178354Ssam return 0; 480178354Ssam sa = IEEE80211_QOS_HAS_SEQ(wh) ? QWH4(wh)->i_addr4 : WH4(wh)->i_addr4; 481178354Ssam return IEEE80211_ADDR_EQ(sa, vap->iv_myaddr); 482178354Ssam#undef WH4 483178354Ssam#undef QWH4 484178354Ssam} 485178354Ssam 486178354Ssam/* 487178354Ssam * Return non-zero if the frame is an echo of a multicast 488178354Ssam * frame sent by ourself. The dir is known to be FROMDS. 489178354Ssam */ 490178354Ssamstatic __inline int 491178354Ssamisfromds_mcastecho(struct ieee80211vap *vap, const struct ieee80211_frame *wh) 492178354Ssam{ 493178354Ssam KASSERT(vap->iv_opmode == IEEE80211_M_STA, ("wrong mode")); 494178354Ssam 495178354Ssam if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) 496178354Ssam return 0; 497178354Ssam return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 498178354Ssam} 499178354Ssam 500178354Ssam/* 501178354Ssam * Decide if a received management frame should be 502178354Ssam * printed when debugging is enabled. This filters some 503178354Ssam * of the less interesting frames that come frequently 504178354Ssam * (e.g. beacons). 505178354Ssam */ 506178354Ssamstatic __inline int 507178354Ssamdoprint(struct ieee80211vap *vap, int subtype) 508178354Ssam{ 509178354Ssam switch (subtype) { 510178354Ssam case IEEE80211_FC0_SUBTYPE_BEACON: 511178354Ssam return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN); 512178354Ssam case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 513178354Ssam return 0; 514178354Ssam } 515178354Ssam return 1; 516178354Ssam} 517178354Ssam 518178354Ssam/* 519178354Ssam * Process a received frame. The node associated with the sender 520178354Ssam * should be supplied. If nothing was found in the node table then 521178354Ssam * the caller is assumed to supply a reference to iv_bss instead. 522178354Ssam * The RSSI and a timestamp are also supplied. The RSSI data is used 523178354Ssam * during AP scanning to select a AP to associate with; it can have 524178354Ssam * any units so long as values have consistent units and higher values 525178354Ssam * mean ``better signal''. The receive timestamp is currently not used 526178354Ssam * by the 802.11 layer. 527178354Ssam */ 528178354Ssamstatic int 529283535Sadriansta_input(struct ieee80211_node *ni, struct mbuf *m, 530283535Sadrian const struct ieee80211_rx_stats *rxs, int rssi, int nf) 531178354Ssam{ 532178354Ssam struct ieee80211vap *vap = ni->ni_vap; 533178354Ssam struct ieee80211com *ic = ni->ni_ic; 534178354Ssam struct ifnet *ifp = vap->iv_ifp; 535178354Ssam struct ieee80211_frame *wh; 536178354Ssam struct ieee80211_key *key; 537178354Ssam struct ether_header *eh; 538203422Srpaulo int hdrspace, need_tap = 1; /* mbuf need to be tapped. */ 539178354Ssam uint8_t dir, type, subtype, qos; 540178354Ssam uint8_t *bssid; 541178354Ssam uint16_t rxseq; 542178354Ssam 543183247Ssam if (m->m_flags & M_AMPDU_MPDU) { 544178354Ssam /* 545178354Ssam * Fastpath for A-MPDU reorder q resubmission. Frames 546183247Ssam * w/ M_AMPDU_MPDU marked have already passed through 547183247Ssam * here but were received out of order and been held on 548183247Ssam * the reorder queue. When resubmitted they are marked 549183247Ssam * with the M_AMPDU_MPDU flag and we can bypass most of 550183247Ssam * the normal processing. 551178354Ssam */ 552178354Ssam wh = mtod(m, struct ieee80211_frame *); 553178354Ssam type = IEEE80211_FC0_TYPE_DATA; 554178354Ssam dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 555178354Ssam subtype = IEEE80211_FC0_SUBTYPE_QOS; 556178354Ssam hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */ 557178354Ssam goto resubmit_ampdu; 558178354Ssam } 559178354Ssam 560178354Ssam KASSERT(ni != NULL, ("null node")); 561178354Ssam ni->ni_inact = ni->ni_inact_reload; 562178354Ssam 563178354Ssam type = -1; /* undefined */ 564178354Ssam 565178354Ssam if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 566178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 567178354Ssam ni->ni_macaddr, NULL, 568178354Ssam "too short (1): len %u", m->m_pkthdr.len); 569178354Ssam vap->iv_stats.is_rx_tooshort++; 570178354Ssam goto out; 571178354Ssam } 572178354Ssam /* 573178354Ssam * Bit of a cheat here, we use a pointer for a 3-address 574178354Ssam * frame format but don't reference fields past outside 575178354Ssam * ieee80211_frame_min w/o first validating the data is 576178354Ssam * present. 577178354Ssam */ 578178354Ssam wh = mtod(m, struct ieee80211_frame *); 579178354Ssam 580178354Ssam if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 581178354Ssam IEEE80211_FC0_VERSION_0) { 582178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 583191547Ssam ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x", 584191547Ssam wh->i_fc[0], wh->i_fc[1]); 585178354Ssam vap->iv_stats.is_rx_badversion++; 586178354Ssam goto err; 587178354Ssam } 588178354Ssam 589178354Ssam dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 590178354Ssam type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 591178354Ssam subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 592178354Ssam if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 593178354Ssam bssid = wh->i_addr2; 594178354Ssam if (!IEEE80211_ADDR_EQ(bssid, ni->ni_bssid)) { 595178354Ssam /* not interested in */ 596178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 597178354Ssam bssid, NULL, "%s", "not to bss"); 598178354Ssam vap->iv_stats.is_rx_wrongbss++; 599178354Ssam goto out; 600178354Ssam } 601227338Sadrian 602227338Sadrian /* 603227338Sadrian * Some devices may be in a promiscuous mode 604227338Sadrian * where they receive frames for multiple station 605227338Sadrian * addresses. 606227338Sadrian * 607227338Sadrian * If we receive a data frame that isn't 608227338Sadrian * destined to our VAP MAC, drop it. 609227338Sadrian * 610227338Sadrian * XXX TODO: This is only enforced when not scanning; 611227338Sadrian * XXX it assumes a software-driven scan will put the NIC 612227338Sadrian * XXX into a "no data frames" mode before setting this 613227338Sadrian * XXX flag. Otherwise it may be possible that we'll still 614227338Sadrian * XXX process data frames whilst scanning. 615227338Sadrian */ 616227338Sadrian if ((! IEEE80211_IS_MULTICAST(wh->i_addr1)) 617227338Sadrian && (! IEEE80211_ADDR_EQ(wh->i_addr1, IF_LLADDR(ifp)))) { 618227338Sadrian IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 619227338Sadrian bssid, NULL, "not to cur sta: lladdr=%6D, addr1=%6D", 620227338Sadrian IF_LLADDR(ifp), ":", wh->i_addr1, ":"); 621227338Sadrian vap->iv_stats.is_rx_wrongbss++; 622227338Sadrian goto out; 623227338Sadrian } 624227338Sadrian 625178354Ssam IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 626192468Ssam ni->ni_noise = nf; 627282820Sadrian if ( IEEE80211_HAS_SEQ(type, subtype) && 628282820Sadrian !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 629178354Ssam uint8_t tid = ieee80211_gettid(wh); 630178354Ssam if (IEEE80211_QOS_HAS_SEQ(wh) && 631178354Ssam TID_TO_WME_AC(tid) >= WME_AC_VI) 632178354Ssam ic->ic_wme.wme_hipri_traffic++; 633178354Ssam rxseq = le16toh(*(uint16_t *)wh->i_seq); 634221418Sadrian if (! ieee80211_check_rxseq(ni, wh)) { 635178354Ssam /* duplicate, discard */ 636178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 637178354Ssam bssid, "duplicate", 638178354Ssam "seqno <%u,%u> fragno <%u,%u> tid %u", 639178354Ssam rxseq >> IEEE80211_SEQ_SEQ_SHIFT, 640178354Ssam ni->ni_rxseqs[tid] >> 641178354Ssam IEEE80211_SEQ_SEQ_SHIFT, 642178354Ssam rxseq & IEEE80211_SEQ_FRAG_MASK, 643178354Ssam ni->ni_rxseqs[tid] & 644178354Ssam IEEE80211_SEQ_FRAG_MASK, 645178354Ssam tid); 646178354Ssam vap->iv_stats.is_rx_dup++; 647178354Ssam IEEE80211_NODE_STAT(ni, rx_dup); 648178354Ssam goto out; 649178354Ssam } 650178354Ssam ni->ni_rxseqs[tid] = rxseq; 651178354Ssam } 652178354Ssam } 653178354Ssam 654178354Ssam switch (type) { 655178354Ssam case IEEE80211_FC0_TYPE_DATA: 656178354Ssam hdrspace = ieee80211_hdrspace(ic, wh); 657178354Ssam if (m->m_len < hdrspace && 658178354Ssam (m = m_pullup(m, hdrspace)) == NULL) { 659178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 660178354Ssam ni->ni_macaddr, NULL, 661178354Ssam "data too short: expecting %u", hdrspace); 662178354Ssam vap->iv_stats.is_rx_tooshort++; 663178354Ssam goto out; /* XXX */ 664178354Ssam } 665178354Ssam /* 666183247Ssam * Handle A-MPDU re-ordering. If the frame is to be 667183247Ssam * processed directly then ieee80211_ampdu_reorder 668178354Ssam * will return 0; otherwise it has consumed the mbuf 669178354Ssam * and we should do nothing more with it. 670178354Ssam */ 671183247Ssam if ((m->m_flags & M_AMPDU) && 672178354Ssam (dir == IEEE80211_FC1_DIR_FROMDS || 673178354Ssam dir == IEEE80211_FC1_DIR_DSTODS) && 674178354Ssam ieee80211_ampdu_reorder(ni, m) != 0) { 675178354Ssam m = NULL; 676178354Ssam goto out; 677178354Ssam } 678178354Ssam resubmit_ampdu: 679178354Ssam if (dir == IEEE80211_FC1_DIR_FROMDS) { 680178354Ssam if ((ifp->if_flags & IFF_SIMPLEX) && 681178354Ssam isfromds_mcastecho(vap, wh)) { 682178354Ssam /* 683178354Ssam * In IEEE802.11 network, multicast 684178354Ssam * packets sent from "me" are broadcast 685178354Ssam * from the AP; silently discard for 686178354Ssam * SIMPLEX interface. 687178354Ssam */ 688178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 689178354Ssam wh, "data", "%s", "multicast echo"); 690178354Ssam vap->iv_stats.is_rx_mcastecho++; 691178354Ssam goto out; 692178354Ssam } 693178354Ssam if ((vap->iv_flags & IEEE80211_F_DWDS) && 694178354Ssam IEEE80211_IS_MULTICAST(wh->i_addr1)) { 695178354Ssam /* 696178354Ssam * DWDS sta's must drop 3-address mcast frames 697178354Ssam * as they will be sent separately as a 4-addr 698178354Ssam * frame. Accepting the 3-addr frame will 699178354Ssam * confuse the bridge into thinking the sending 700178354Ssam * sta is located at the end of WDS link. 701178354Ssam */ 702178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 703178354Ssam "3-address data", "%s", "DWDS enabled"); 704178354Ssam vap->iv_stats.is_rx_mcastecho++; 705178354Ssam goto out; 706178354Ssam } 707178354Ssam } else if (dir == IEEE80211_FC1_DIR_DSTODS) { 708178354Ssam if ((vap->iv_flags & IEEE80211_F_DWDS) == 0) { 709178354Ssam IEEE80211_DISCARD(vap, 710178354Ssam IEEE80211_MSG_INPUT, wh, "4-address data", 711178354Ssam "%s", "DWDS not enabled"); 712178354Ssam vap->iv_stats.is_rx_wrongdir++; 713178354Ssam goto out; 714178354Ssam } 715178354Ssam if ((ifp->if_flags & IFF_SIMPLEX) && 716178354Ssam isdstods_mcastecho(vap, wh)) { 717178354Ssam /* 718178354Ssam * In IEEE802.11 network, multicast 719178354Ssam * packets sent from "me" are broadcast 720178354Ssam * from the AP; silently discard for 721178354Ssam * SIMPLEX interface. 722178354Ssam */ 723178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 724178354Ssam "4-address data", "%s", "multicast echo"); 725178354Ssam vap->iv_stats.is_rx_mcastecho++; 726178354Ssam goto out; 727178354Ssam } 728178354Ssam } else { 729178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 730178354Ssam "data", "incorrect dir 0x%x", dir); 731178354Ssam vap->iv_stats.is_rx_wrongdir++; 732178354Ssam goto out; 733178354Ssam } 734178354Ssam 735178354Ssam /* 736178354Ssam * Handle privacy requirements. Note that we 737178354Ssam * must not be preempted from here until after 738178354Ssam * we (potentially) call ieee80211_crypto_demic; 739178354Ssam * otherwise we may violate assumptions in the 740178354Ssam * crypto cipher modules used to do delayed update 741178354Ssam * of replay sequence numbers. 742178354Ssam */ 743260444Skevlo if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 744178354Ssam if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 745178354Ssam /* 746178354Ssam * Discard encrypted frames when privacy is off. 747178354Ssam */ 748178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 749178354Ssam wh, "WEP", "%s", "PRIVACY off"); 750178354Ssam vap->iv_stats.is_rx_noprivacy++; 751178354Ssam IEEE80211_NODE_STAT(ni, rx_noprivacy); 752178354Ssam goto out; 753178354Ssam } 754178354Ssam key = ieee80211_crypto_decap(ni, m, hdrspace); 755178354Ssam if (key == NULL) { 756178354Ssam /* NB: stats+msgs handled in crypto_decap */ 757178354Ssam IEEE80211_NODE_STAT(ni, rx_wepfail); 758178354Ssam goto out; 759178354Ssam } 760178354Ssam wh = mtod(m, struct ieee80211_frame *); 761260444Skevlo wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; 762178354Ssam } else { 763178354Ssam /* XXX M_WEP and IEEE80211_F_PRIVACY */ 764178354Ssam key = NULL; 765178354Ssam } 766178354Ssam 767178354Ssam /* 768178354Ssam * Save QoS bits for use below--before we strip the header. 769178354Ssam */ 770178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_QOS) { 771178354Ssam qos = (dir == IEEE80211_FC1_DIR_DSTODS) ? 772178354Ssam ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] : 773178354Ssam ((struct ieee80211_qosframe *)wh)->i_qos[0]; 774178354Ssam } else 775178354Ssam qos = 0; 776178354Ssam 777178354Ssam /* 778178354Ssam * Next up, any fragmentation. 779178354Ssam */ 780178354Ssam if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 781178354Ssam m = ieee80211_defrag(ni, m, hdrspace); 782178354Ssam if (m == NULL) { 783178354Ssam /* Fragment dropped or frame not complete yet */ 784178354Ssam goto out; 785178354Ssam } 786178354Ssam } 787178354Ssam wh = NULL; /* no longer valid, catch any uses */ 788178354Ssam 789178354Ssam /* 790178354Ssam * Next strip any MSDU crypto bits. 791178354Ssam */ 792178354Ssam if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) { 793178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 794178354Ssam ni->ni_macaddr, "data", "%s", "demic error"); 795178354Ssam vap->iv_stats.is_rx_demicfail++; 796178354Ssam IEEE80211_NODE_STAT(ni, rx_demicfail); 797178354Ssam goto out; 798178354Ssam } 799178354Ssam 800178354Ssam /* copy to listener after decrypt */ 801192468Ssam if (ieee80211_radiotap_active_vap(vap)) 802202967Srpaulo ieee80211_radiotap_rx(vap, m); 803178354Ssam need_tap = 0; 804178354Ssam 805178354Ssam /* 806178354Ssam * Finally, strip the 802.11 header. 807178354Ssam */ 808178354Ssam m = ieee80211_decap(vap, m, hdrspace); 809178354Ssam if (m == NULL) { 810178354Ssam /* XXX mask bit to check for both */ 811178354Ssam /* don't count Null data frames as errors */ 812178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 813178354Ssam subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 814178354Ssam goto out; 815178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 816178354Ssam ni->ni_macaddr, "data", "%s", "decap error"); 817178354Ssam vap->iv_stats.is_rx_decap++; 818178354Ssam IEEE80211_NODE_STAT(ni, rx_decap); 819178354Ssam goto err; 820178354Ssam } 821178354Ssam eh = mtod(m, struct ether_header *); 822178354Ssam if (!ieee80211_node_is_authorized(ni)) { 823178354Ssam /* 824178354Ssam * Deny any non-PAE frames received prior to 825178354Ssam * authorization. For open/shared-key 826178354Ssam * authentication the port is mark authorized 827178354Ssam * after authentication completes. For 802.1x 828178354Ssam * the port is not marked authorized by the 829178354Ssam * authenticator until the handshake has completed. 830178354Ssam */ 831178354Ssam if (eh->ether_type != htons(ETHERTYPE_PAE)) { 832178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 833178354Ssam eh->ether_shost, "data", 834178354Ssam "unauthorized port: ether type 0x%x len %u", 835178354Ssam eh->ether_type, m->m_pkthdr.len); 836178354Ssam vap->iv_stats.is_rx_unauth++; 837178354Ssam IEEE80211_NODE_STAT(ni, rx_unauth); 838178354Ssam goto err; 839178354Ssam } 840178354Ssam } else { 841178354Ssam /* 842178354Ssam * When denying unencrypted frames, discard 843178354Ssam * any non-PAE frames received without encryption. 844178354Ssam */ 845178354Ssam if ((vap->iv_flags & IEEE80211_F_DROPUNENC) && 846178354Ssam (key == NULL && (m->m_flags & M_WEP) == 0) && 847178354Ssam eh->ether_type != htons(ETHERTYPE_PAE)) { 848178354Ssam /* 849178354Ssam * Drop unencrypted frames. 850178354Ssam */ 851178354Ssam vap->iv_stats.is_rx_unencrypted++; 852178354Ssam IEEE80211_NODE_STAT(ni, rx_unencrypted); 853178354Ssam goto out; 854178354Ssam } 855178354Ssam } 856178354Ssam /* XXX require HT? */ 857178354Ssam if (qos & IEEE80211_QOS_AMSDU) { 858178354Ssam m = ieee80211_decap_amsdu(ni, m); 859178354Ssam if (m == NULL) 860178354Ssam return IEEE80211_FC0_TYPE_DATA; 861190391Ssam } else { 862190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 863190391Ssam m = ieee80211_decap_fastframe(vap, ni, m); 864190391Ssam if (m == NULL) 865178354Ssam return IEEE80211_FC0_TYPE_DATA; 866190391Ssam#endif 867178354Ssam } 868178354Ssam ieee80211_deliver_data(vap, ni, m); 869178354Ssam return IEEE80211_FC0_TYPE_DATA; 870178354Ssam 871178354Ssam case IEEE80211_FC0_TYPE_MGT: 872178354Ssam vap->iv_stats.is_rx_mgmt++; 873178354Ssam IEEE80211_NODE_STAT(ni, rx_mgmt); 874178354Ssam if (dir != IEEE80211_FC1_DIR_NODS) { 875178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 876178354Ssam wh, "data", "incorrect dir 0x%x", dir); 877178354Ssam vap->iv_stats.is_rx_wrongdir++; 878178354Ssam goto err; 879178354Ssam } 880178354Ssam if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 881178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 882178354Ssam ni->ni_macaddr, "mgt", "too short: len %u", 883178354Ssam m->m_pkthdr.len); 884178354Ssam vap->iv_stats.is_rx_tooshort++; 885178354Ssam goto out; 886178354Ssam } 887178354Ssam#ifdef IEEE80211_DEBUG 888178354Ssam if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) || 889178354Ssam ieee80211_msg_dumppkts(vap)) { 890178354Ssam if_printf(ifp, "received %s from %s rssi %d\n", 891178354Ssam ieee80211_mgt_subtype_name[subtype >> 892178354Ssam IEEE80211_FC0_SUBTYPE_SHIFT], 893178354Ssam ether_sprintf(wh->i_addr2), rssi); 894178354Ssam } 895178354Ssam#endif 896260444Skevlo if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 897178354Ssam if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) { 898178354Ssam /* 899178354Ssam * Only shared key auth frames with a challenge 900178354Ssam * should be encrypted, discard all others. 901178354Ssam */ 902178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 903178354Ssam wh, ieee80211_mgt_subtype_name[subtype >> 904178354Ssam IEEE80211_FC0_SUBTYPE_SHIFT], 905178354Ssam "%s", "WEP set but not permitted"); 906178354Ssam vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 907178354Ssam goto out; 908178354Ssam } 909178354Ssam if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 910178354Ssam /* 911178354Ssam * Discard encrypted frames when privacy is off. 912178354Ssam */ 913178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 914178354Ssam wh, "mgt", "%s", "WEP set but PRIVACY off"); 915178354Ssam vap->iv_stats.is_rx_noprivacy++; 916178354Ssam goto out; 917178354Ssam } 918178354Ssam hdrspace = ieee80211_hdrspace(ic, wh); 919178354Ssam key = ieee80211_crypto_decap(ni, m, hdrspace); 920178354Ssam if (key == NULL) { 921178354Ssam /* NB: stats+msgs handled in crypto_decap */ 922178354Ssam goto out; 923178354Ssam } 924178354Ssam wh = mtod(m, struct ieee80211_frame *); 925260444Skevlo wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; 926178354Ssam } 927283535Sadrian vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf); 928191534Ssam goto out; 929178354Ssam 930178354Ssam case IEEE80211_FC0_TYPE_CTL: 931178354Ssam vap->iv_stats.is_rx_ctl++; 932178354Ssam IEEE80211_NODE_STAT(ni, rx_ctrl); 933191546Ssam vap->iv_recv_ctl(ni, m, subtype); 934178354Ssam goto out; 935191549Ssam 936178354Ssam default: 937178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 938178354Ssam wh, NULL, "bad frame type 0x%x", type); 939178354Ssam /* should not come here */ 940178354Ssam break; 941178354Ssam } 942178354Ssamerr: 943271861Sglebius if_inc_counter(ifp, IFCOUNTER_IERRORS, 1); 944178354Ssamout: 945178354Ssam if (m != NULL) { 946192765Ssam if (need_tap && ieee80211_radiotap_active_vap(vap)) 947192468Ssam ieee80211_radiotap_rx(vap, m); 948178354Ssam m_freem(m); 949178354Ssam } 950178354Ssam return type; 951178354Ssam} 952178354Ssam 953178354Ssamstatic void 954178354Ssamsta_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh, 955192468Ssam int rssi, int nf, uint16_t seq, uint16_t status) 956178354Ssam{ 957178354Ssam struct ieee80211vap *vap = ni->ni_vap; 958178354Ssam 959178354Ssam if (ni->ni_authmode == IEEE80211_AUTH_SHARED) { 960178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 961178354Ssam ni->ni_macaddr, "open auth", 962178354Ssam "bad sta auth mode %u", ni->ni_authmode); 963178354Ssam vap->iv_stats.is_rx_bad_auth++; /* XXX */ 964178354Ssam return; 965178354Ssam } 966178354Ssam if (vap->iv_state != IEEE80211_S_AUTH || 967178354Ssam seq != IEEE80211_AUTH_OPEN_RESPONSE) { 968178354Ssam vap->iv_stats.is_rx_bad_auth++; 969178354Ssam return; 970178354Ssam } 971178354Ssam if (status != 0) { 972178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, 973178354Ssam ni, "open auth failed (reason %d)", status); 974178354Ssam vap->iv_stats.is_rx_auth_fail++; 975178354Ssam vap->iv_stats.is_rx_authfail_code = status; 976178354Ssam ieee80211_new_state(vap, IEEE80211_S_SCAN, 977178354Ssam IEEE80211_SCAN_FAIL_STATUS); 978178354Ssam } else 979178354Ssam ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 980178354Ssam} 981178354Ssam 982178354Ssamstatic void 983178354Ssamsta_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh, 984192468Ssam uint8_t *frm, uint8_t *efrm, int rssi, int nf, 985178354Ssam uint16_t seq, uint16_t status) 986178354Ssam{ 987178354Ssam struct ieee80211vap *vap = ni->ni_vap; 988178354Ssam uint8_t *challenge; 989178354Ssam int estatus; 990178354Ssam 991178354Ssam /* 992178354Ssam * NB: this can happen as we allow pre-shared key 993178354Ssam * authentication to be enabled w/o wep being turned 994178354Ssam * on so that configuration of these can be done 995178354Ssam * in any order. It may be better to enforce the 996178354Ssam * ordering in which case this check would just be 997178354Ssam * for sanity/consistency. 998178354Ssam */ 999178354Ssam if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 1000178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1001178354Ssam ni->ni_macaddr, "shared key auth", 1002178354Ssam "%s", " PRIVACY is disabled"); 1003178354Ssam estatus = IEEE80211_STATUS_ALG; 1004178354Ssam goto bad; 1005178354Ssam } 1006178354Ssam /* 1007178354Ssam * Pre-shared key authentication is evil; accept 1008178354Ssam * it only if explicitly configured (it is supported 1009178354Ssam * mainly for compatibility with clients like OS X). 1010178354Ssam */ 1011178354Ssam if (ni->ni_authmode != IEEE80211_AUTH_AUTO && 1012178354Ssam ni->ni_authmode != IEEE80211_AUTH_SHARED) { 1013178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1014178354Ssam ni->ni_macaddr, "shared key auth", 1015178354Ssam "bad sta auth mode %u", ni->ni_authmode); 1016178354Ssam vap->iv_stats.is_rx_bad_auth++; /* XXX maybe a unique error? */ 1017178354Ssam estatus = IEEE80211_STATUS_ALG; 1018178354Ssam goto bad; 1019178354Ssam } 1020178354Ssam 1021178354Ssam challenge = NULL; 1022178354Ssam if (frm + 1 < efrm) { 1023178354Ssam if ((frm[1] + 2) > (efrm - frm)) { 1024178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1025178354Ssam ni->ni_macaddr, "shared key auth", 1026178354Ssam "ie %d/%d too long", 1027178354Ssam frm[0], (frm[1] + 2) - (efrm - frm)); 1028178354Ssam vap->iv_stats.is_rx_bad_auth++; 1029178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1030178354Ssam goto bad; 1031178354Ssam } 1032178354Ssam if (*frm == IEEE80211_ELEMID_CHALLENGE) 1033178354Ssam challenge = frm; 1034178354Ssam frm += frm[1] + 2; 1035178354Ssam } 1036178354Ssam switch (seq) { 1037178354Ssam case IEEE80211_AUTH_SHARED_CHALLENGE: 1038178354Ssam case IEEE80211_AUTH_SHARED_RESPONSE: 1039178354Ssam if (challenge == NULL) { 1040178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1041178354Ssam ni->ni_macaddr, "shared key auth", 1042178354Ssam "%s", "no challenge"); 1043178354Ssam vap->iv_stats.is_rx_bad_auth++; 1044178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1045178354Ssam goto bad; 1046178354Ssam } 1047178354Ssam if (challenge[1] != IEEE80211_CHALLENGE_LEN) { 1048178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1049178354Ssam ni->ni_macaddr, "shared key auth", 1050178354Ssam "bad challenge len %d", challenge[1]); 1051178354Ssam vap->iv_stats.is_rx_bad_auth++; 1052178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1053178354Ssam goto bad; 1054178354Ssam } 1055178354Ssam default: 1056178354Ssam break; 1057178354Ssam } 1058178354Ssam if (vap->iv_state != IEEE80211_S_AUTH) 1059178354Ssam return; 1060178354Ssam switch (seq) { 1061178354Ssam case IEEE80211_AUTH_SHARED_PASS: 1062178354Ssam if (ni->ni_challenge != NULL) { 1063283538Sadrian IEEE80211_FREE(ni->ni_challenge, M_80211_NODE); 1064178354Ssam ni->ni_challenge = NULL; 1065178354Ssam } 1066178354Ssam if (status != 0) { 1067178354Ssam IEEE80211_NOTE_FRAME(vap, 1068178354Ssam IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, wh, 1069178354Ssam "shared key auth failed (reason %d)", status); 1070178354Ssam vap->iv_stats.is_rx_auth_fail++; 1071178354Ssam vap->iv_stats.is_rx_authfail_code = status; 1072178354Ssam return; 1073178354Ssam } 1074178354Ssam ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 1075178354Ssam break; 1076178354Ssam case IEEE80211_AUTH_SHARED_CHALLENGE: 1077178354Ssam if (!ieee80211_alloc_challenge(ni)) 1078178354Ssam return; 1079178354Ssam /* XXX could optimize by passing recvd challenge */ 1080178354Ssam memcpy(ni->ni_challenge, &challenge[2], challenge[1]); 1081178354Ssam IEEE80211_SEND_MGMT(ni, 1082178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, seq + 1); 1083178354Ssam break; 1084178354Ssam default: 1085178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_AUTH, 1086178354Ssam wh, "shared key auth", "bad seq %d", seq); 1087178354Ssam vap->iv_stats.is_rx_bad_auth++; 1088178354Ssam return; 1089178354Ssam } 1090178354Ssam return; 1091178354Ssambad: 1092178354Ssam /* 1093178354Ssam * Kick the state machine. This short-circuits 1094178354Ssam * using the mgt frame timeout to trigger the 1095178354Ssam * state transition. 1096178354Ssam */ 1097178354Ssam if (vap->iv_state == IEEE80211_S_AUTH) 1098178354Ssam ieee80211_new_state(vap, IEEE80211_S_SCAN, 1099178354Ssam IEEE80211_SCAN_FAIL_STATUS); 1100178354Ssam} 1101178354Ssam 1102244060Sadrianint 1103178354Ssamieee80211_parse_wmeparams(struct ieee80211vap *vap, uint8_t *frm, 1104178354Ssam const struct ieee80211_frame *wh) 1105178354Ssam{ 1106178354Ssam#define MS(_v, _f) (((_v) & _f) >> _f##_S) 1107178354Ssam struct ieee80211_wme_state *wme = &vap->iv_ic->ic_wme; 1108178354Ssam u_int len = frm[1], qosinfo; 1109178354Ssam int i; 1110178354Ssam 1111178354Ssam if (len < sizeof(struct ieee80211_wme_param)-2) { 1112178354Ssam IEEE80211_DISCARD_IE(vap, 1113178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WME, 1114178354Ssam wh, "WME", "too short, len %u", len); 1115178354Ssam return -1; 1116178354Ssam } 1117178354Ssam qosinfo = frm[__offsetof(struct ieee80211_wme_param, param_qosInfo)]; 1118178354Ssam qosinfo &= WME_QOSINFO_COUNT; 1119178354Ssam /* XXX do proper check for wraparound */ 1120178354Ssam if (qosinfo == wme->wme_wmeChanParams.cap_info) 1121178354Ssam return 0; 1122178354Ssam frm += __offsetof(struct ieee80211_wme_param, params_acParams); 1123178354Ssam for (i = 0; i < WME_NUM_AC; i++) { 1124178354Ssam struct wmeParams *wmep = 1125178354Ssam &wme->wme_wmeChanParams.cap_wmeParams[i]; 1126178354Ssam /* NB: ACI not used */ 1127178354Ssam wmep->wmep_acm = MS(frm[0], WME_PARAM_ACM); 1128178354Ssam wmep->wmep_aifsn = MS(frm[0], WME_PARAM_AIFSN); 1129178354Ssam wmep->wmep_logcwmin = MS(frm[1], WME_PARAM_LOGCWMIN); 1130178354Ssam wmep->wmep_logcwmax = MS(frm[1], WME_PARAM_LOGCWMAX); 1131178354Ssam wmep->wmep_txopLimit = LE_READ_2(frm+2); 1132178354Ssam frm += 4; 1133178354Ssam } 1134178354Ssam wme->wme_wmeChanParams.cap_info = qosinfo; 1135178354Ssam return 1; 1136178354Ssam#undef MS 1137178354Ssam} 1138178354Ssam 1139178354Ssam/* 1140193439Ssam * Process 11h Channel Switch Announcement (CSA) ie. If this 1141193439Ssam * is the first CSA then initiate the switch. Otherwise we 1142193439Ssam * track state and trigger completion and/or cancel of the switch. 1143193439Ssam * XXX should be public for IBSS use 1144193439Ssam */ 1145193439Ssamstatic void 1146193439Ssamieee80211_parse_csaparams(struct ieee80211vap *vap, uint8_t *frm, 1147193439Ssam const struct ieee80211_frame *wh) 1148193439Ssam{ 1149193439Ssam struct ieee80211com *ic = vap->iv_ic; 1150193439Ssam const struct ieee80211_csa_ie *csa = 1151193439Ssam (const struct ieee80211_csa_ie *) frm; 1152193439Ssam 1153193439Ssam KASSERT(vap->iv_state >= IEEE80211_S_RUN, 1154193439Ssam ("state %s", ieee80211_state_name[vap->iv_state])); 1155193439Ssam 1156193439Ssam if (csa->csa_mode > 1) { 1157193439Ssam IEEE80211_DISCARD_IE(vap, 1158193439Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1159193439Ssam wh, "CSA", "invalid mode %u", csa->csa_mode); 1160193439Ssam return; 1161193439Ssam } 1162193439Ssam IEEE80211_LOCK(ic); 1163193439Ssam if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 1164193439Ssam /* 1165193439Ssam * Convert the channel number to a channel reference. We 1166193439Ssam * try first to preserve turbo attribute of the current 1167193439Ssam * channel then fallback. Note this will not work if the 1168193439Ssam * CSA specifies a channel that requires a band switch (e.g. 1169193439Ssam * 11a => 11g). This is intentional as 11h is defined only 1170193439Ssam * for 5GHz/11a and because the switch does not involve a 1171193439Ssam * reassociation, protocol state (capabilities, negotated 1172193439Ssam * rates, etc) may/will be wrong. 1173193439Ssam */ 1174193439Ssam struct ieee80211_channel *c = 1175193439Ssam ieee80211_find_channel_byieee(ic, csa->csa_newchan, 1176193439Ssam (ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALLTURBO)); 1177193439Ssam if (c == NULL) { 1178193439Ssam c = ieee80211_find_channel_byieee(ic, 1179193439Ssam csa->csa_newchan, 1180193439Ssam (ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALL)); 1181193439Ssam if (c == NULL) { 1182193439Ssam IEEE80211_DISCARD_IE(vap, 1183193439Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1184193439Ssam wh, "CSA", "invalid channel %u", 1185193439Ssam csa->csa_newchan); 1186193439Ssam goto done; 1187193439Ssam } 1188193439Ssam } 1189193439Ssam#if IEEE80211_CSA_COUNT_MIN > 0 1190193439Ssam if (csa->csa_count < IEEE80211_CSA_COUNT_MIN) { 1191193439Ssam /* 1192193439Ssam * Require at least IEEE80211_CSA_COUNT_MIN count to 1193193439Ssam * reduce the risk of being redirected by a fabricated 1194193439Ssam * CSA. If a valid CSA is dropped we'll still get a 1195193439Ssam * beacon miss when the AP leaves the channel so we'll 1196193439Ssam * eventually follow to the new channel. 1197193439Ssam * 1198193439Ssam * NOTE: this violates the 11h spec that states that 1199193439Ssam * count may be any value and if 0 then a switch 1200193439Ssam * should happen asap. 1201193439Ssam */ 1202193439Ssam IEEE80211_DISCARD_IE(vap, 1203193439Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1204193439Ssam wh, "CSA", "count %u too small, must be >= %u", 1205193439Ssam csa->csa_count, IEEE80211_CSA_COUNT_MIN); 1206193439Ssam goto done; 1207193439Ssam } 1208193439Ssam#endif 1209193439Ssam ieee80211_csa_startswitch(ic, c, csa->csa_mode, csa->csa_count); 1210193439Ssam } else { 1211193439Ssam /* 1212193439Ssam * Validate this ie against the initial CSA. We require 1213193439Ssam * mode and channel not change and the count must be 1214193439Ssam * monotonically decreasing. This may be pointless and 1215193439Ssam * canceling the switch as a result may be too paranoid but 1216193439Ssam * in the worst case if we drop out of CSA because of this 1217193439Ssam * and the AP does move then we'll just end up taking a 1218193439Ssam * beacon miss and scan to find the AP. 1219193439Ssam * 1220193439Ssam * XXX may want <= on count as we also process ProbeResp 1221193439Ssam * frames and those may come in w/ the same count as the 1222193439Ssam * previous beacon; but doing so leaves us open to a stuck 1223193439Ssam * count until we add a dead-man timer 1224193439Ssam */ 1225193439Ssam if (!(csa->csa_count < ic->ic_csa_count && 1226193439Ssam csa->csa_mode == ic->ic_csa_mode && 1227193439Ssam csa->csa_newchan == ieee80211_chan2ieee(ic, ic->ic_csa_newchan))) { 1228193439Ssam IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_DOTH, wh, 1229193439Ssam "CSA ie mismatch, initial ie <%d,%d,%d>, " 1230193439Ssam "this ie <%d,%d,%d>", ic->ic_csa_mode, 1231193439Ssam ic->ic_csa_newchan, ic->ic_csa_count, 1232193439Ssam csa->csa_mode, csa->csa_newchan, csa->csa_count); 1233193439Ssam ieee80211_csa_cancelswitch(ic); 1234193439Ssam } else { 1235193439Ssam if (csa->csa_count <= 1) 1236193439Ssam ieee80211_csa_completeswitch(ic); 1237193439Ssam else 1238193439Ssam ic->ic_csa_count = csa->csa_count; 1239193439Ssam } 1240193439Ssam } 1241193439Ssamdone: 1242193439Ssam IEEE80211_UNLOCK(ic); 1243193439Ssam} 1244193439Ssam 1245193439Ssam/* 1246178354Ssam * Return non-zero if a background scan may be continued: 1247178354Ssam * o bg scan is active 1248178354Ssam * o no channel switch is pending 1249178354Ssam * o there has not been any traffic recently 1250178354Ssam * 1251178354Ssam * Note we do not check if there is an administrative enable; 1252178354Ssam * this is only done to start the scan. We assume that any 1253178354Ssam * change in state will be accompanied by a request to cancel 1254178354Ssam * active scans which will otherwise cause this test to fail. 1255178354Ssam */ 1256178354Ssamstatic __inline int 1257178354Ssamcontbgscan(struct ieee80211vap *vap) 1258178354Ssam{ 1259178354Ssam struct ieee80211com *ic = vap->iv_ic; 1260178354Ssam 1261178354Ssam return ((ic->ic_flags_ext & IEEE80211_FEXT_BGSCAN) && 1262178354Ssam (ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 && 1263178354Ssam vap->iv_state == IEEE80211_S_RUN && /* XXX? */ 1264178354Ssam time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle)); 1265178354Ssam} 1266178354Ssam 1267178354Ssam/* 1268178354Ssam * Return non-zero if a backgrond scan may be started: 1269178354Ssam * o bg scanning is administratively enabled 1270178354Ssam * o no channel switch is pending 1271178354Ssam * o we are not boosted on a dynamic turbo channel 1272178354Ssam * o there has not been a scan recently 1273178354Ssam * o there has not been any traffic recently 1274178354Ssam */ 1275178354Ssamstatic __inline int 1276178354Ssamstartbgscan(struct ieee80211vap *vap) 1277178354Ssam{ 1278178354Ssam struct ieee80211com *ic = vap->iv_ic; 1279178354Ssam 1280178354Ssam return ((vap->iv_flags & IEEE80211_F_BGSCAN) && 1281178354Ssam (ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 && 1282190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 1283178354Ssam !IEEE80211_IS_CHAN_DTURBO(ic->ic_curchan) && 1284190391Ssam#endif 1285178354Ssam time_after(ticks, ic->ic_lastscan + vap->iv_bgscanintvl) && 1286178354Ssam time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle)); 1287178354Ssam} 1288178354Ssam 1289178354Ssamstatic void 1290283535Sadriansta_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, int subtype, 1291283535Sadrian const struct ieee80211_rx_stats *rxs, 1292283535Sadrian int rssi, int nf) 1293178354Ssam{ 1294178354Ssam#define ISPROBE(_st) ((_st) == IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1295178354Ssam#define ISREASSOC(_st) ((_st) == IEEE80211_FC0_SUBTYPE_REASSOC_RESP) 1296178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1297178354Ssam struct ieee80211com *ic = ni->ni_ic; 1298283535Sadrian struct ieee80211_channel *rxchan = ic->ic_curchan; 1299178354Ssam struct ieee80211_frame *wh; 1300178354Ssam uint8_t *frm, *efrm; 1301178354Ssam uint8_t *rates, *xrates, *wme, *htcap, *htinfo; 1302178354Ssam uint8_t rate; 1303233452Sadrian int ht_state_change = 0; 1304178354Ssam 1305178354Ssam wh = mtod(m0, struct ieee80211_frame *); 1306178354Ssam frm = (uint8_t *)&wh[1]; 1307178354Ssam efrm = mtod(m0, uint8_t *) + m0->m_len; 1308178354Ssam switch (subtype) { 1309178354Ssam case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1310178354Ssam case IEEE80211_FC0_SUBTYPE_BEACON: { 1311178354Ssam struct ieee80211_scanparams scan; 1312283535Sadrian struct ieee80211_channel *c; 1313178354Ssam /* 1314178354Ssam * We process beacon/probe response frames: 1315178354Ssam * o when scanning, or 1316178354Ssam * o station mode when associated (to collect state 1317191444Srpaulo * updates such as 802.11g slot time) 1318178354Ssam * Frames otherwise received are discarded. 1319178354Ssam */ 1320178354Ssam if (!((ic->ic_flags & IEEE80211_F_SCAN) || ni->ni_associd)) { 1321178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1322178354Ssam return; 1323178354Ssam } 1324283535Sadrian 1325283535Sadrian /* Override RX channel as appropriate */ 1326283535Sadrian if (rxs != NULL) { 1327283535Sadrian c = ieee80211_lookup_channel_rxstatus(vap, rxs); 1328283535Sadrian if (c != NULL) 1329283535Sadrian rxchan = c; 1330283535Sadrian } 1331283535Sadrian 1332178354Ssam /* XXX probe response in sta mode when !scanning? */ 1333283535Sadrian if (ieee80211_parse_beacon(ni, m0, rxchan, &scan) != 0) { 1334232270Sadrian if (! (ic->ic_flags & IEEE80211_F_SCAN)) 1335232270Sadrian vap->iv_stats.is_beacon_bad++; 1336178354Ssam return; 1337232244Sadrian } 1338264855Sadrian 1339178354Ssam /* 1340178354Ssam * Count frame now that we know it's to be processed. 1341178354Ssam */ 1342178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1343178354Ssam vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1344178354Ssam IEEE80211_NODE_STAT(ni, rx_beacons); 1345178354Ssam } else 1346178354Ssam IEEE80211_NODE_STAT(ni, rx_proberesp); 1347178354Ssam /* 1348178354Ssam * When operating in station mode, check for state updates. 1349178354Ssam * Be careful to ignore beacons received while doing a 1350178354Ssam * background scan. We consider only 11g/WMM stuff right now. 1351178354Ssam */ 1352178354Ssam if (ni->ni_associd != 0 && 1353178354Ssam ((ic->ic_flags & IEEE80211_F_SCAN) == 0 || 1354178354Ssam IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_bssid))) { 1355178354Ssam /* record tsf of last beacon */ 1356178354Ssam memcpy(ni->ni_tstamp.data, scan.tstamp, 1357178354Ssam sizeof(ni->ni_tstamp)); 1358178354Ssam /* count beacon frame for s/w bmiss handling */ 1359178354Ssam vap->iv_swbmiss_count++; 1360178354Ssam vap->iv_bmiss_count = 0; 1361178354Ssam if (ni->ni_erp != scan.erp) { 1362178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1363178354Ssam wh->i_addr2, 1364178354Ssam "erp change: was 0x%x, now 0x%x", 1365178354Ssam ni->ni_erp, scan.erp); 1366178354Ssam if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 1367178354Ssam (ni->ni_erp & IEEE80211_ERP_USE_PROTECTION)) 1368178354Ssam ic->ic_flags |= IEEE80211_F_USEPROT; 1369178354Ssam else 1370178354Ssam ic->ic_flags &= ~IEEE80211_F_USEPROT; 1371178354Ssam ni->ni_erp = scan.erp; 1372178354Ssam /* XXX statistic */ 1373178354Ssam /* XXX driver notification */ 1374178354Ssam } 1375178354Ssam if ((ni->ni_capinfo ^ scan.capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME) { 1376178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1377178354Ssam wh->i_addr2, 1378178354Ssam "capabilities change: was 0x%x, now 0x%x", 1379178354Ssam ni->ni_capinfo, scan.capinfo); 1380178354Ssam /* 1381178354Ssam * NB: we assume short preamble doesn't 1382178354Ssam * change dynamically 1383178354Ssam */ 1384178354Ssam ieee80211_set_shortslottime(ic, 1385178354Ssam IEEE80211_IS_CHAN_A(ic->ic_bsschan) || 1386178354Ssam (scan.capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)); 1387178354Ssam ni->ni_capinfo = (ni->ni_capinfo &~ IEEE80211_CAPINFO_SHORT_SLOTTIME) 1388178354Ssam | (scan.capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME); 1389178354Ssam /* XXX statistic */ 1390178354Ssam } 1391178354Ssam if (scan.wme != NULL && 1392178354Ssam (ni->ni_flags & IEEE80211_NODE_QOS) && 1393178354Ssam ieee80211_parse_wmeparams(vap, scan.wme, wh) > 0) 1394178354Ssam ieee80211_wme_updateparams(vap); 1395190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 1396178354Ssam if (scan.ath != NULL) 1397178354Ssam ieee80211_parse_athparams(ni, scan.ath, wh); 1398190391Ssam#endif 1399183254Ssam if (scan.htcap != NULL && scan.htinfo != NULL && 1400193655Ssam (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1401178354Ssam /* XXX state changes? */ 1402233452Sadrian if (ieee80211_ht_updateparams(ni, 1403233452Sadrian scan.htcap, scan.htinfo)) 1404233452Sadrian ht_state_change = 1; 1405178354Ssam } 1406227331Sadrian if (scan.quiet) 1407227331Sadrian ic->ic_set_quiet(ni, scan.quiet); 1408264855Sadrian 1409178354Ssam if (scan.tim != NULL) { 1410178354Ssam struct ieee80211_tim_ie *tim = 1411178354Ssam (struct ieee80211_tim_ie *) scan.tim; 1412264855Sadrian /* 1413264855Sadrian * XXX Check/debug this code; see if it's about 1414264855Sadrian * the right time to force the VAP awake if we 1415264855Sadrian * receive a frame destined for us? 1416264855Sadrian */ 1417178354Ssam int aid = IEEE80211_AID(ni->ni_associd); 1418178354Ssam int ix = aid / NBBY; 1419178354Ssam int min = tim->tim_bitctl &~ 1; 1420178354Ssam int max = tim->tim_len + min - 4; 1421275983Sadrian int tim_ucast = 0, tim_mcast = 0; 1422264855Sadrian 1423264855Sadrian /* 1424264855Sadrian * Only do this for unicast traffic in the TIM 1425264855Sadrian * The multicast traffic notification for 1426264855Sadrian * the scan notification stuff should occur 1427264855Sadrian * differently. 1428264855Sadrian */ 1429264855Sadrian if (min <= ix && ix <= max && 1430264855Sadrian isset(tim->tim_bitmap - min, aid)) { 1431275983Sadrian tim_ucast = 1; 1432264855Sadrian } 1433264855Sadrian 1434264855Sadrian /* 1435275983Sadrian * Do a separate notification 1436264855Sadrian * for the multicast bit being set. 1437264855Sadrian */ 1438264906Sadrian if (tim->tim_bitctl & 1) { 1439275983Sadrian tim_mcast = 1; 1440275983Sadrian } 1441275983Sadrian 1442275983Sadrian /* 1443275983Sadrian * If the TIM indicates there's traffic for 1444275983Sadrian * us then get us out of STA mode powersave. 1445275983Sadrian */ 1446275983Sadrian if (tim_ucast == 1) { 1447275983Sadrian 1448275983Sadrian /* 1449275983Sadrian * Wake us out of SLEEP state if we're 1450275983Sadrian * in it; and if we're doing bgscan 1451275983Sadrian * then wake us out of STA powersave. 1452275983Sadrian */ 1453264855Sadrian ieee80211_sta_tim_notify(vap, 1); 1454275983Sadrian 1455275983Sadrian /* 1456275983Sadrian * This is preventing us from 1457275983Sadrian * continuing a bgscan; because it 1458275983Sadrian * tricks the contbgscan() 1459275983Sadrian * routine to think there's always 1460275983Sadrian * traffic for us. 1461275983Sadrian * 1462275983Sadrian * I think we need both an RX and 1463275983Sadrian * TX ic_lastdata field. 1464275983Sadrian */ 1465178354Ssam ic->ic_lastdata = ticks; 1466178354Ssam } 1467264906Sadrian 1468178354Ssam ni->ni_dtim_count = tim->tim_count; 1469178354Ssam ni->ni_dtim_period = tim->tim_period; 1470178354Ssam } 1471193439Ssam if (scan.csa != NULL && 1472193439Ssam (vap->iv_flags & IEEE80211_F_DOTH)) 1473193439Ssam ieee80211_parse_csaparams(vap, scan.csa, wh); 1474193439Ssam else if (ic->ic_flags & IEEE80211_F_CSAPENDING) { 1475193439Ssam /* 1476193439Ssam * No CSA ie or 11h disabled, but a channel 1477193439Ssam * switch is pending; drop out so we aren't 1478193439Ssam * stuck in CSA state. If the AP really is 1479193439Ssam * moving we'll get a beacon miss and scan. 1480193439Ssam */ 1481193439Ssam IEEE80211_LOCK(ic); 1482193439Ssam ieee80211_csa_cancelswitch(ic); 1483193439Ssam IEEE80211_UNLOCK(ic); 1484193439Ssam } 1485178354Ssam /* 1486178354Ssam * If scanning, pass the info to the scan module. 1487178354Ssam * Otherwise, check if it's the right time to do 1488178354Ssam * a background scan. Background scanning must 1489178354Ssam * be enabled and we must not be operating in the 1490178354Ssam * turbo phase of dynamic turbo mode. Then, 1491178354Ssam * it's been a while since the last background 1492178354Ssam * scan and if no data frames have come through 1493178354Ssam * recently, kick off a scan. Note that this 1494178354Ssam * is the mechanism by which a background scan 1495178354Ssam * is started _and_ continued each time we 1496178354Ssam * return on-channel to receive a beacon from 1497178354Ssam * our ap. 1498178354Ssam */ 1499178354Ssam if (ic->ic_flags & IEEE80211_F_SCAN) { 1500283535Sadrian ieee80211_add_scan(vap, rxchan, 1501282742Sadrian &scan, wh, subtype, rssi, nf); 1502178354Ssam } else if (contbgscan(vap)) { 1503178354Ssam ieee80211_bg_scan(vap, 0); 1504178354Ssam } else if (startbgscan(vap)) { 1505178354Ssam vap->iv_stats.is_scan_bg++; 1506178354Ssam#if 0 1507178354Ssam /* wakeup if we are sleeing */ 1508178354Ssam ieee80211_set_pwrsave(vap, 0); 1509178354Ssam#endif 1510178354Ssam ieee80211_bg_scan(vap, 0); 1511178354Ssam } 1512233452Sadrian 1513233452Sadrian /* 1514264855Sadrian * Put the station to sleep if we haven't seen 1515264855Sadrian * traffic in a while. 1516264855Sadrian */ 1517264855Sadrian IEEE80211_LOCK(ic); 1518264855Sadrian ieee80211_sta_ps_timer_check(vap); 1519264855Sadrian IEEE80211_UNLOCK(ic); 1520264855Sadrian 1521264855Sadrian /* 1522233452Sadrian * If we've had a channel width change (eg HT20<->HT40) 1523233452Sadrian * then schedule a delayed driver notification. 1524233452Sadrian */ 1525233452Sadrian if (ht_state_change) 1526233452Sadrian ieee80211_update_chw(ic); 1527178354Ssam return; 1528178354Ssam } 1529178354Ssam /* 1530178354Ssam * If scanning, just pass information to the scan module. 1531178354Ssam */ 1532178354Ssam if (ic->ic_flags & IEEE80211_F_SCAN) { 1533178354Ssam if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1534178354Ssam /* 1535178354Ssam * Actively scanning a channel marked passive; 1536178354Ssam * send a probe request now that we know there 1537178354Ssam * is 802.11 traffic present. 1538178354Ssam * 1539178354Ssam * XXX check if the beacon we recv'd gives 1540178354Ssam * us what we need and suppress the probe req 1541178354Ssam */ 1542178354Ssam ieee80211_probe_curchan(vap, 1); 1543178354Ssam ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1544178354Ssam } 1545283535Sadrian ieee80211_add_scan(vap, rxchan, &scan, wh, 1546282742Sadrian subtype, rssi, nf); 1547178354Ssam return; 1548178354Ssam } 1549178354Ssam break; 1550178354Ssam } 1551178354Ssam 1552178354Ssam case IEEE80211_FC0_SUBTYPE_AUTH: { 1553178354Ssam uint16_t algo, seq, status; 1554178354Ssam /* 1555178354Ssam * auth frame format 1556178354Ssam * [2] algorithm 1557178354Ssam * [2] sequence 1558178354Ssam * [2] status 1559178354Ssam * [tlv*] challenge 1560178354Ssam */ 1561178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return); 1562178354Ssam algo = le16toh(*(uint16_t *)frm); 1563178354Ssam seq = le16toh(*(uint16_t *)(frm + 2)); 1564178354Ssam status = le16toh(*(uint16_t *)(frm + 4)); 1565178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr2, 1566178354Ssam "recv auth frame with algorithm %d seq %d", algo, seq); 1567178354Ssam 1568178354Ssam if (vap->iv_flags & IEEE80211_F_COUNTERM) { 1569178354Ssam IEEE80211_DISCARD(vap, 1570178354Ssam IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO, 1571178354Ssam wh, "auth", "%s", "TKIP countermeasures enabled"); 1572178354Ssam vap->iv_stats.is_rx_auth_countermeasures++; 1573178354Ssam if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 1574178354Ssam ieee80211_send_error(ni, wh->i_addr2, 1575178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 1576178354Ssam IEEE80211_REASON_MIC_FAILURE); 1577178354Ssam } 1578178354Ssam return; 1579178354Ssam } 1580178354Ssam if (algo == IEEE80211_AUTH_ALG_SHARED) 1581192468Ssam sta_auth_shared(ni, wh, frm + 6, efrm, rssi, nf, 1582192468Ssam seq, status); 1583178354Ssam else if (algo == IEEE80211_AUTH_ALG_OPEN) 1584192468Ssam sta_auth_open(ni, wh, rssi, nf, seq, status); 1585178354Ssam else { 1586178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1587178354Ssam wh, "auth", "unsupported alg %d", algo); 1588178354Ssam vap->iv_stats.is_rx_auth_unsupported++; 1589178354Ssam return; 1590178354Ssam } 1591178354Ssam break; 1592178354Ssam } 1593178354Ssam 1594178354Ssam case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 1595178354Ssam case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: { 1596178354Ssam uint16_t capinfo, associd; 1597178354Ssam uint16_t status; 1598178354Ssam 1599178354Ssam if (vap->iv_state != IEEE80211_S_ASSOC) { 1600178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1601178354Ssam return; 1602178354Ssam } 1603178354Ssam 1604178354Ssam /* 1605178354Ssam * asresp frame format 1606178354Ssam * [2] capability information 1607178354Ssam * [2] status 1608178354Ssam * [2] association ID 1609178354Ssam * [tlv] supported rates 1610178354Ssam * [tlv] extended supported rates 1611178354Ssam * [tlv] WME 1612178354Ssam * [tlv] HT capabilities 1613178354Ssam * [tlv] HT info 1614178354Ssam */ 1615178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return); 1616178354Ssam ni = vap->iv_bss; 1617178354Ssam capinfo = le16toh(*(uint16_t *)frm); 1618178354Ssam frm += 2; 1619178354Ssam status = le16toh(*(uint16_t *)frm); 1620178354Ssam frm += 2; 1621178354Ssam if (status != 0) { 1622178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1623178354Ssam wh->i_addr2, "%sassoc failed (reason %d)", 1624178354Ssam ISREASSOC(subtype) ? "re" : "", status); 1625178354Ssam vap->iv_stats.is_rx_auth_fail++; /* XXX */ 1626178354Ssam return; 1627178354Ssam } 1628178354Ssam associd = le16toh(*(uint16_t *)frm); 1629178354Ssam frm += 2; 1630178354Ssam 1631178354Ssam rates = xrates = wme = htcap = htinfo = NULL; 1632178354Ssam while (efrm - frm > 1) { 1633178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 1634178354Ssam switch (*frm) { 1635178354Ssam case IEEE80211_ELEMID_RATES: 1636178354Ssam rates = frm; 1637178354Ssam break; 1638178354Ssam case IEEE80211_ELEMID_XRATES: 1639178354Ssam xrates = frm; 1640178354Ssam break; 1641178354Ssam case IEEE80211_ELEMID_HTCAP: 1642178354Ssam htcap = frm; 1643178354Ssam break; 1644178354Ssam case IEEE80211_ELEMID_HTINFO: 1645178354Ssam htinfo = frm; 1646178354Ssam break; 1647178354Ssam case IEEE80211_ELEMID_VENDOR: 1648178354Ssam if (iswmeoui(frm)) 1649178354Ssam wme = frm; 1650193655Ssam else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) { 1651178354Ssam /* 1652178354Ssam * Accept pre-draft HT ie's if the 1653178354Ssam * standard ones have not been seen. 1654178354Ssam */ 1655178354Ssam if (ishtcapoui(frm)) { 1656178354Ssam if (htcap == NULL) 1657178354Ssam htcap = frm; 1658178354Ssam } else if (ishtinfooui(frm)) { 1659178354Ssam if (htinfo == NULL) 1660219603Sbschmidt htinfo = frm; 1661178354Ssam } 1662178354Ssam } 1663178354Ssam /* XXX Atheros OUI support */ 1664178354Ssam break; 1665178354Ssam } 1666178354Ssam frm += frm[1] + 2; 1667178354Ssam } 1668178354Ssam 1669178354Ssam IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 1670178354Ssam if (xrates != NULL) 1671178354Ssam IEEE80211_VERIFY_ELEMENT(xrates, 1672178354Ssam IEEE80211_RATE_MAXSIZE - rates[1], return); 1673178354Ssam rate = ieee80211_setup_rates(ni, rates, xrates, 1674178354Ssam IEEE80211_F_JOIN | 1675178354Ssam IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1676178354Ssam IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1677178354Ssam if (rate & IEEE80211_RATE_BASIC) { 1678178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1679178354Ssam wh->i_addr2, 1680178354Ssam "%sassoc failed (rate set mismatch)", 1681178354Ssam ISREASSOC(subtype) ? "re" : ""); 1682178354Ssam vap->iv_stats.is_rx_assoc_norate++; 1683178354Ssam ieee80211_new_state(vap, IEEE80211_S_SCAN, 1684178354Ssam IEEE80211_SCAN_FAIL_STATUS); 1685178354Ssam return; 1686178354Ssam } 1687178354Ssam 1688178354Ssam ni->ni_capinfo = capinfo; 1689178354Ssam ni->ni_associd = associd; 1690178354Ssam if (ni->ni_jointime == 0) 1691178354Ssam ni->ni_jointime = time_uptime; 1692178354Ssam if (wme != NULL && 1693178354Ssam ieee80211_parse_wmeparams(vap, wme, wh) >= 0) { 1694178354Ssam ni->ni_flags |= IEEE80211_NODE_QOS; 1695178354Ssam ieee80211_wme_updateparams(vap); 1696178354Ssam } else 1697178354Ssam ni->ni_flags &= ~IEEE80211_NODE_QOS; 1698178354Ssam /* 1699178354Ssam * Setup HT state according to the negotiation. 1700178354Ssam * 1701178354Ssam * NB: shouldn't need to check if HT use is enabled but some 1702178354Ssam * ap's send back HT ie's even when we don't indicate we 1703178354Ssam * are HT capable in our AssocReq. 1704178354Ssam */ 1705178354Ssam if (htcap != NULL && htinfo != NULL && 1706193655Ssam (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1707183254Ssam ieee80211_ht_node_init(ni); 1708183254Ssam ieee80211_ht_updateparams(ni, htcap, htinfo); 1709178354Ssam ieee80211_setup_htrates(ni, htcap, 1710178354Ssam IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1711178354Ssam ieee80211_setup_basic_htrates(ni, htinfo); 1712193966Ssam ieee80211_node_setuptxparms(ni); 1713214894Sbschmidt ieee80211_ratectl_node_init(ni); 1714190579Ssam } else { 1715190579Ssam#ifdef IEEE80211_SUPPORT_SUPERG 1716190579Ssam if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_ATH)) 1717190579Ssam ieee80211_ff_node_init(ni); 1718190579Ssam#endif 1719178354Ssam } 1720178354Ssam /* 1721178354Ssam * Configure state now that we are associated. 1722178354Ssam * 1723178354Ssam * XXX may need different/additional driver callbacks? 1724178354Ssam */ 1725178354Ssam if (IEEE80211_IS_CHAN_A(ic->ic_curchan) || 1726178354Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) { 1727178354Ssam ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 1728178354Ssam ic->ic_flags &= ~IEEE80211_F_USEBARKER; 1729178354Ssam } else { 1730178354Ssam ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 1731178354Ssam ic->ic_flags |= IEEE80211_F_USEBARKER; 1732178354Ssam } 1733178354Ssam ieee80211_set_shortslottime(ic, 1734178354Ssam IEEE80211_IS_CHAN_A(ic->ic_curchan) || 1735178354Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)); 1736178354Ssam /* 1737178354Ssam * Honor ERP protection. 1738178354Ssam * 1739178354Ssam * NB: ni_erp should zero for non-11g operation. 1740178354Ssam */ 1741178354Ssam if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 1742178354Ssam (ni->ni_erp & IEEE80211_ERP_USE_PROTECTION)) 1743178354Ssam ic->ic_flags |= IEEE80211_F_USEPROT; 1744178354Ssam else 1745178354Ssam ic->ic_flags &= ~IEEE80211_F_USEPROT; 1746178354Ssam IEEE80211_NOTE_MAC(vap, 1747178354Ssam IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, wh->i_addr2, 1748183256Ssam "%sassoc success at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", 1749178354Ssam ISREASSOC(subtype) ? "re" : "", 1750178354Ssam IEEE80211_NODE_AID(ni), 1751178354Ssam ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 1752178354Ssam ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 1753178354Ssam ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "", 1754178354Ssam ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 1755178354Ssam ni->ni_flags & IEEE80211_NODE_HT ? 1756182834Ssam (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 1757178354Ssam ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 1758183255Ssam ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 1759183255Ssam ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 1760183256Ssam ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 1761178354Ssam IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 1762178354Ssam ", fast-frames" : "", 1763178354Ssam IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 1764178354Ssam ", turbo" : "" 1765178354Ssam ); 1766178354Ssam ieee80211_new_state(vap, IEEE80211_S_RUN, subtype); 1767178354Ssam break; 1768178354Ssam } 1769178354Ssam 1770178354Ssam case IEEE80211_FC0_SUBTYPE_DEAUTH: { 1771178354Ssam uint16_t reason; 1772178354Ssam 1773178354Ssam if (vap->iv_state == IEEE80211_S_SCAN) { 1774178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1775178354Ssam return; 1776178354Ssam } 1777178354Ssam if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { 1778178354Ssam /* NB: can happen when in promiscuous mode */ 1779178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1780178354Ssam break; 1781178354Ssam } 1782178354Ssam 1783178354Ssam /* 1784178354Ssam * deauth frame format 1785178354Ssam * [2] reason 1786178354Ssam */ 1787178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); 1788178354Ssam reason = le16toh(*(uint16_t *)frm); 1789178354Ssam 1790178354Ssam vap->iv_stats.is_rx_deauth++; 1791178354Ssam vap->iv_stats.is_rx_deauth_code = reason; 1792178354Ssam IEEE80211_NODE_STAT(ni, rx_deauth); 1793178354Ssam 1794178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 1795178354Ssam "recv deauthenticate (reason %d)", reason); 1796178354Ssam ieee80211_new_state(vap, IEEE80211_S_AUTH, 1797178354Ssam (reason << 8) | IEEE80211_FC0_SUBTYPE_DEAUTH); 1798178354Ssam break; 1799178354Ssam } 1800178354Ssam 1801178354Ssam case IEEE80211_FC0_SUBTYPE_DISASSOC: { 1802178354Ssam uint16_t reason; 1803178354Ssam 1804178354Ssam if (vap->iv_state != IEEE80211_S_RUN && 1805178354Ssam vap->iv_state != IEEE80211_S_ASSOC && 1806178354Ssam vap->iv_state != IEEE80211_S_AUTH) { 1807178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1808178354Ssam return; 1809178354Ssam } 1810178354Ssam if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { 1811178354Ssam /* NB: can happen when in promiscuous mode */ 1812178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1813178354Ssam break; 1814178354Ssam } 1815178354Ssam 1816178354Ssam /* 1817178354Ssam * disassoc frame format 1818178354Ssam * [2] reason 1819178354Ssam */ 1820178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); 1821178354Ssam reason = le16toh(*(uint16_t *)frm); 1822178354Ssam 1823178354Ssam vap->iv_stats.is_rx_disassoc++; 1824178354Ssam vap->iv_stats.is_rx_disassoc_code = reason; 1825178354Ssam IEEE80211_NODE_STAT(ni, rx_disassoc); 1826178354Ssam 1827178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 1828178354Ssam "recv disassociate (reason %d)", reason); 1829178354Ssam ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 1830178354Ssam break; 1831178354Ssam } 1832178354Ssam 1833178354Ssam case IEEE80211_FC0_SUBTYPE_ACTION: 1834218927Sbschmidt case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 1835218958Sbschmidt if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 1836218958Sbschmidt !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1837218927Sbschmidt IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1838218958Sbschmidt wh, NULL, "%s", "not for us"); 1839218958Sbschmidt vap->iv_stats.is_rx_mgtdiscard++; 1840218958Sbschmidt } else if (vap->iv_state != IEEE80211_S_RUN) { 1841218958Sbschmidt IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1842218927Sbschmidt wh, NULL, "wrong state %s", 1843218927Sbschmidt ieee80211_state_name[vap->iv_state]); 1844178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1845218958Sbschmidt } else { 1846218958Sbschmidt if (ieee80211_parse_action(ni, m0) == 0) 1847218958Sbschmidt (void)ic->ic_recv_action(ni, wh, frm, efrm); 1848218927Sbschmidt } 1849178354Ssam break; 1850178354Ssam 1851178354Ssam case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 1852178354Ssam case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 1853218927Sbschmidt case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 1854218927Sbschmidt case IEEE80211_FC0_SUBTYPE_ATIM: 1855218927Sbschmidt IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1856218927Sbschmidt wh, NULL, "%s", "not handled"); 1857178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1858218927Sbschmidt break; 1859218927Sbschmidt 1860178354Ssam default: 1861178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1862218927Sbschmidt wh, "mgt", "subtype 0x%x not handled", subtype); 1863178354Ssam vap->iv_stats.is_rx_badsubtype++; 1864178354Ssam break; 1865178354Ssam } 1866178354Ssam#undef ISREASSOC 1867178354Ssam#undef ISPROBE 1868178354Ssam} 1869191546Ssam 1870191546Ssamstatic void 1871205277Srpaulosta_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 1872191546Ssam{ 1873205277Srpaulo switch (subtype) { 1874205277Srpaulo case IEEE80211_FC0_SUBTYPE_BAR: 1875205277Srpaulo ieee80211_recv_bar(ni, m); 1876205277Srpaulo break; 1877205277Srpaulo } 1878191546Ssam} 1879