ieee80211_sta.c revision 264906
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 264906 2014-04-25 01:20:10Z 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); 73192468Ssamstatic int sta_input(struct ieee80211_node *, struct mbuf *, int, int); 74178354Ssamstatic void sta_recv_mgmt(struct ieee80211_node *, struct mbuf *, 75192468Ssam int subtype, int rssi, int nf); 76191546Ssamstatic void sta_recv_ctl(struct ieee80211_node *, struct mbuf *, int subtype); 77178354Ssam 78178354Ssamvoid 79178354Ssamieee80211_sta_attach(struct ieee80211com *ic) 80178354Ssam{ 81178354Ssam ic->ic_vattach[IEEE80211_M_STA] = sta_vattach; 82178354Ssam} 83178354Ssam 84178354Ssamvoid 85178354Ssamieee80211_sta_detach(struct ieee80211com *ic) 86178354Ssam{ 87178354Ssam} 88178354Ssam 89178354Ssamstatic void 90178354Ssamsta_vdetach(struct ieee80211vap *vap) 91178354Ssam{ 92178354Ssam} 93178354Ssam 94178354Ssamstatic void 95178354Ssamsta_vattach(struct ieee80211vap *vap) 96178354Ssam{ 97178354Ssam vap->iv_newstate = sta_newstate; 98178354Ssam vap->iv_input = sta_input; 99178354Ssam vap->iv_recv_mgmt = sta_recv_mgmt; 100191546Ssam vap->iv_recv_ctl = sta_recv_ctl; 101178354Ssam vap->iv_opdetach = sta_vdetach; 102178354Ssam vap->iv_bmiss = sta_beacon_miss; 103178354Ssam} 104178354Ssam 105178354Ssam/* 106178354Ssam * Handle a beacon miss event. The common code filters out 107178354Ssam * spurious events that can happen when scanning and/or before 108178354Ssam * reaching RUN state. 109178354Ssam */ 110178354Ssamstatic void 111178354Ssamsta_beacon_miss(struct ieee80211vap *vap) 112178354Ssam{ 113193439Ssam struct ieee80211com *ic = vap->iv_ic; 114178354Ssam 115225913Sadrian IEEE80211_LOCK_ASSERT(ic); 116225913Sadrian 117193439Ssam KASSERT((ic->ic_flags & IEEE80211_F_SCAN) == 0, ("scanning")); 118193439Ssam KASSERT(vap->iv_state >= IEEE80211_S_RUN, 119193439Ssam ("wrong state %s", ieee80211_state_name[vap->iv_state])); 120178354Ssam 121193439Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 122193439Ssam "beacon miss, mode %s state %s\n", 123193439Ssam ieee80211_opmode_name[vap->iv_opmode], 124193439Ssam ieee80211_state_name[vap->iv_state]); 125193439Ssam 126193439Ssam if (vap->iv_state == IEEE80211_S_CSA) { 127193439Ssam /* 128193439Ssam * A Channel Switch is pending; assume we missed the 129193439Ssam * beacon that would've completed the process and just 130193439Ssam * force the switch. If we made a mistake we'll not 131193439Ssam * find the AP on the new channel and fall back to a 132193439Ssam * normal scan. 133193439Ssam */ 134193439Ssam ieee80211_csa_completeswitch(ic); 135193439Ssam return; 136193439Ssam } 137178354Ssam if (++vap->iv_bmiss_count < vap->iv_bmiss_max) { 138178354Ssam /* 139178354Ssam * Send a directed probe req before falling back to a 140178354Ssam * scan; if we receive a response ic_bmiss_count will 141178354Ssam * be reset. Some cards mistakenly report beacon miss 142178354Ssam * so this avoids the expensive scan if the ap is 143178354Ssam * still there. 144178354Ssam */ 145178354Ssam ieee80211_send_probereq(vap->iv_bss, vap->iv_myaddr, 146178354Ssam vap->iv_bss->ni_bssid, vap->iv_bss->ni_bssid, 147178354Ssam vap->iv_bss->ni_essid, vap->iv_bss->ni_esslen); 148178354Ssam return; 149178354Ssam } 150205140Sweongyo 151205140Sweongyo callout_stop(&vap->iv_swbmiss); 152178354Ssam vap->iv_bmiss_count = 0; 153178354Ssam vap->iv_stats.is_beacon_miss++; 154178354Ssam if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { 155190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 156190402Ssam struct ieee80211com *ic = vap->iv_ic; 157190402Ssam 158178354Ssam /* 159178354Ssam * If we receive a beacon miss interrupt when using 160178354Ssam * dynamic turbo, attempt to switch modes before 161178354Ssam * reassociating. 162178354Ssam */ 163178354Ssam if (IEEE80211_ATH_CAP(vap, vap->iv_bss, IEEE80211_NODE_TURBOP)) 164178354Ssam ieee80211_dturbo_switch(vap, 165178354Ssam ic->ic_bsschan->ic_flags ^ IEEE80211_CHAN_TURBO); 166190391Ssam#endif 167178354Ssam /* 168178354Ssam * Try to reassociate before scanning for a new ap. 169178354Ssam */ 170178354Ssam ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 171178354Ssam } else { 172178354Ssam /* 173178354Ssam * Somebody else is controlling state changes (e.g. 174178354Ssam * a user-mode app) don't do anything that would 175178354Ssam * confuse them; just drop into scan mode so they'll 176178354Ssam * notified of the state change and given control. 177178354Ssam */ 178178354Ssam ieee80211_new_state(vap, IEEE80211_S_SCAN, 0); 179178354Ssam } 180178354Ssam} 181178354Ssam 182178354Ssam/* 183178354Ssam * Handle deauth with reason. We retry only for 184178354Ssam * the cases where we might succeed. Otherwise 185178354Ssam * we downgrade the ap and scan. 186178354Ssam */ 187178354Ssamstatic void 188178354Ssamsta_authretry(struct ieee80211vap *vap, struct ieee80211_node *ni, int reason) 189178354Ssam{ 190178354Ssam switch (reason) { 191178354Ssam case IEEE80211_STATUS_SUCCESS: /* NB: MLME assoc */ 192178354Ssam case IEEE80211_STATUS_TIMEOUT: 193178354Ssam case IEEE80211_REASON_ASSOC_EXPIRE: 194178354Ssam case IEEE80211_REASON_NOT_AUTHED: 195178354Ssam case IEEE80211_REASON_NOT_ASSOCED: 196178354Ssam case IEEE80211_REASON_ASSOC_LEAVE: 197178354Ssam case IEEE80211_REASON_ASSOC_NOT_AUTHED: 198178354Ssam IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, 1); 199178354Ssam break; 200178354Ssam default: 201178354Ssam ieee80211_scan_assoc_fail(vap, vap->iv_bss->ni_macaddr, reason); 202178354Ssam if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) 203178354Ssam ieee80211_check_scan_current(vap); 204178354Ssam break; 205178354Ssam } 206178354Ssam} 207178354Ssam 208178354Ssam/* 209178354Ssam * IEEE80211_M_STA vap state machine handler. 210178354Ssam * This routine handles the main states in the 802.11 protocol. 211178354Ssam */ 212178354Ssamstatic int 213178354Ssamsta_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 214178354Ssam{ 215178354Ssam struct ieee80211com *ic = vap->iv_ic; 216178354Ssam struct ieee80211_node *ni; 217178354Ssam enum ieee80211_state ostate; 218178354Ssam 219178354Ssam IEEE80211_LOCK_ASSERT(ic); 220178354Ssam 221178354Ssam ostate = vap->iv_state; 222178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 223178354Ssam __func__, ieee80211_state_name[ostate], 224178354Ssam ieee80211_state_name[nstate], arg); 225178354Ssam vap->iv_state = nstate; /* state transition */ 226178354Ssam callout_stop(&vap->iv_mgtsend); /* XXX callout_drain */ 227178354Ssam if (ostate != IEEE80211_S_SCAN) 228178354Ssam ieee80211_cancel_scan(vap); /* background scan */ 229178354Ssam ni = vap->iv_bss; /* NB: no reference held */ 230178354Ssam if (vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS) 231178354Ssam callout_stop(&vap->iv_swbmiss); 232178354Ssam switch (nstate) { 233178354Ssam case IEEE80211_S_INIT: 234178354Ssam switch (ostate) { 235178354Ssam case IEEE80211_S_SLEEP: 236178354Ssam /* XXX wakeup */ 237264855Sadrian /* XXX driver hook to wakeup the hardware? */ 238178354Ssam case IEEE80211_S_RUN: 239178354Ssam IEEE80211_SEND_MGMT(ni, 240178354Ssam IEEE80211_FC0_SUBTYPE_DISASSOC, 241178354Ssam IEEE80211_REASON_ASSOC_LEAVE); 242178354Ssam ieee80211_sta_leave(ni); 243178354Ssam break; 244178354Ssam case IEEE80211_S_ASSOC: 245178354Ssam IEEE80211_SEND_MGMT(ni, 246178354Ssam IEEE80211_FC0_SUBTYPE_DEAUTH, 247178354Ssam IEEE80211_REASON_AUTH_LEAVE); 248178354Ssam break; 249178354Ssam case IEEE80211_S_SCAN: 250178354Ssam ieee80211_cancel_scan(vap); 251178354Ssam break; 252178354Ssam default: 253178354Ssam goto invalid; 254178354Ssam } 255178354Ssam if (ostate != IEEE80211_S_INIT) { 256178354Ssam /* NB: optimize INIT -> INIT case */ 257178354Ssam ieee80211_reset_bss(vap); 258178354Ssam } 259178354Ssam if (vap->iv_auth->ia_detach != NULL) 260178354Ssam vap->iv_auth->ia_detach(vap); 261178354Ssam break; 262178354Ssam case IEEE80211_S_SCAN: 263178354Ssam switch (ostate) { 264178354Ssam case IEEE80211_S_INIT: 265178354Ssam /* 266178354Ssam * Initiate a scan. We can come here as a result 267178354Ssam * of an IEEE80211_IOC_SCAN_REQ too in which case 268178354Ssam * the vap will be marked with IEEE80211_FEXT_SCANREQ 269178354Ssam * and the scan request parameters will be present 270178354Ssam * in iv_scanreq. Otherwise we do the default. 271178354Ssam */ 272178354Ssam if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 273178354Ssam ieee80211_check_scan(vap, 274178354Ssam vap->iv_scanreq_flags, 275178354Ssam vap->iv_scanreq_duration, 276178354Ssam vap->iv_scanreq_mindwell, 277178354Ssam vap->iv_scanreq_maxdwell, 278178354Ssam vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 279178354Ssam vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 280178354Ssam } else 281178354Ssam ieee80211_check_scan_current(vap); 282178354Ssam break; 283178354Ssam case IEEE80211_S_SCAN: 284178354Ssam case IEEE80211_S_AUTH: 285178354Ssam case IEEE80211_S_ASSOC: 286178354Ssam /* 287178354Ssam * These can happen either because of a timeout 288178354Ssam * on an assoc/auth response or because of a 289178354Ssam * change in state that requires a reset. For 290178354Ssam * the former we're called with a non-zero arg 291178354Ssam * that is the cause for the failure; pass this 292178354Ssam * to the scan code so it can update state. 293178354Ssam * Otherwise trigger a new scan unless we're in 294178354Ssam * manual roaming mode in which case an application 295178354Ssam * must issue an explicit scan request. 296178354Ssam */ 297178354Ssam if (arg != 0) 298178354Ssam ieee80211_scan_assoc_fail(vap, 299178354Ssam vap->iv_bss->ni_macaddr, arg); 300178354Ssam if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) 301178354Ssam ieee80211_check_scan_current(vap); 302178354Ssam break; 303264906Sadrian case IEEE80211_S_SLEEP: /* beacon miss */ 304264906Sadrian /* 305264906Sadrian * XXX if in sleep we need to wakeup the hardware. 306264906Sadrian */ 307264906Sadrian /* FALLTHROUGH */ 308178354Ssam case IEEE80211_S_RUN: /* beacon miss */ 309178354Ssam /* 310178354Ssam * Beacon miss. Notify user space and if not 311178354Ssam * under control of a user application (roaming 312178354Ssam * manual) kick off a scan to re-connect. 313178354Ssam */ 314264906Sadrian 315178354Ssam ieee80211_sta_leave(ni); 316178354Ssam if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) 317178354Ssam ieee80211_check_scan_current(vap); 318178354Ssam break; 319178354Ssam default: 320178354Ssam goto invalid; 321178354Ssam } 322178354Ssam break; 323178354Ssam case IEEE80211_S_AUTH: 324178354Ssam switch (ostate) { 325178354Ssam case IEEE80211_S_INIT: 326178354Ssam case IEEE80211_S_SCAN: 327178354Ssam IEEE80211_SEND_MGMT(ni, 328178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 1); 329178354Ssam break; 330178354Ssam case IEEE80211_S_AUTH: 331178354Ssam case IEEE80211_S_ASSOC: 332178354Ssam switch (arg & 0xff) { 333178354Ssam case IEEE80211_FC0_SUBTYPE_AUTH: 334178354Ssam /* ??? */ 335178354Ssam IEEE80211_SEND_MGMT(ni, 336178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 2); 337178354Ssam break; 338178354Ssam case IEEE80211_FC0_SUBTYPE_DEAUTH: 339178354Ssam sta_authretry(vap, ni, arg>>8); 340178354Ssam break; 341178354Ssam } 342178354Ssam break; 343178354Ssam case IEEE80211_S_RUN: 344178354Ssam switch (arg & 0xff) { 345178354Ssam case IEEE80211_FC0_SUBTYPE_AUTH: 346178354Ssam IEEE80211_SEND_MGMT(ni, 347178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 2); 348178354Ssam vap->iv_state = ostate; /* stay RUN */ 349178354Ssam break; 350178354Ssam case IEEE80211_FC0_SUBTYPE_DEAUTH: 351178354Ssam ieee80211_sta_leave(ni); 352178354Ssam if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { 353178354Ssam /* try to reauth */ 354178354Ssam IEEE80211_SEND_MGMT(ni, 355178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 1); 356178354Ssam } 357178354Ssam break; 358178354Ssam } 359178354Ssam break; 360178354Ssam default: 361178354Ssam goto invalid; 362178354Ssam } 363178354Ssam break; 364178354Ssam case IEEE80211_S_ASSOC: 365178354Ssam switch (ostate) { 366178354Ssam case IEEE80211_S_AUTH: 367178354Ssam case IEEE80211_S_ASSOC: 368178354Ssam IEEE80211_SEND_MGMT(ni, 369178354Ssam IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0); 370178354Ssam break; 371178354Ssam case IEEE80211_S_SLEEP: /* cannot happen */ 372178354Ssam case IEEE80211_S_RUN: 373178354Ssam ieee80211_sta_leave(ni); 374178354Ssam if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { 375178354Ssam IEEE80211_SEND_MGMT(ni, arg ? 376178354Ssam IEEE80211_FC0_SUBTYPE_REASSOC_REQ : 377178354Ssam IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0); 378178354Ssam } 379178354Ssam break; 380178354Ssam default: 381178354Ssam goto invalid; 382178354Ssam } 383178354Ssam break; 384178354Ssam case IEEE80211_S_RUN: 385178354Ssam if (vap->iv_flags & IEEE80211_F_WPA) { 386178354Ssam /* XXX validate prerequisites */ 387178354Ssam } 388178354Ssam switch (ostate) { 389178354Ssam case IEEE80211_S_RUN: 390193439Ssam case IEEE80211_S_CSA: 391178354Ssam break; 392178354Ssam case IEEE80211_S_AUTH: /* when join is done in fw */ 393178354Ssam case IEEE80211_S_ASSOC: 394178354Ssam#ifdef IEEE80211_DEBUG 395178354Ssam if (ieee80211_msg_debug(vap)) { 396178354Ssam ieee80211_note(vap, "%s with %s ssid ", 397178354Ssam (vap->iv_opmode == IEEE80211_M_STA ? 398178354Ssam "associated" : "synchronized"), 399178354Ssam ether_sprintf(ni->ni_bssid)); 400178354Ssam ieee80211_print_essid(vap->iv_bss->ni_essid, 401178354Ssam ni->ni_esslen); 402178354Ssam /* XXX MCS/HT */ 403178354Ssam printf(" channel %d start %uMb\n", 404178354Ssam ieee80211_chan2ieee(ic, ic->ic_curchan), 405178354Ssam IEEE80211_RATE2MBS(ni->ni_txrate)); 406178354Ssam } 407178354Ssam#endif 408178354Ssam ieee80211_scan_assoc_success(vap, ni->ni_macaddr); 409178354Ssam ieee80211_notify_node_join(ni, 410178354Ssam arg == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 411178354Ssam break; 412178354Ssam case IEEE80211_S_SLEEP: 413264855Sadrian /* Wake up from sleep */ 414241138Sadrian vap->iv_sta_ps(vap, 0); 415178354Ssam break; 416178354Ssam default: 417178354Ssam goto invalid; 418178354Ssam } 419178354Ssam ieee80211_sync_curchan(ic); 420178354Ssam if (ostate != IEEE80211_S_RUN && 421178354Ssam (vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS)) { 422178354Ssam /* 423178354Ssam * Start s/w beacon miss timer for devices w/o 424178354Ssam * hardware support. We fudge a bit here since 425178354Ssam * we're doing this in software. 426178354Ssam */ 427178354Ssam vap->iv_swbmiss_period = IEEE80211_TU_TO_TICKS( 428178354Ssam 2 * vap->iv_bmissthreshold * ni->ni_intval); 429178354Ssam vap->iv_swbmiss_count = 0; 430178354Ssam callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period, 431178354Ssam ieee80211_swbmiss, vap); 432178354Ssam } 433178354Ssam /* 434178354Ssam * When 802.1x is not in use mark the port authorized 435178354Ssam * at this point so traffic can flow. 436178354Ssam */ 437178354Ssam if (ni->ni_authmode != IEEE80211_AUTH_8021X) 438178354Ssam ieee80211_node_authorize(ni); 439184345Ssam /* 440184345Ssam * Fake association when joining an existing bss. 441264855Sadrian * 442264855Sadrian * Don't do this if we're doing SLEEP->RUN. 443184345Ssam */ 444264855Sadrian if (ic->ic_newassoc != NULL && ostate != IEEE80211_S_SLEEP) 445264855Sadrian ic->ic_newassoc(vap->iv_bss, (ostate != IEEE80211_S_RUN)); 446178354Ssam break; 447193439Ssam case IEEE80211_S_CSA: 448193439Ssam if (ostate != IEEE80211_S_RUN) 449193439Ssam goto invalid; 450193439Ssam break; 451178354Ssam case IEEE80211_S_SLEEP: 452241138Sadrian vap->iv_sta_ps(vap, 1); 453178354Ssam break; 454178354Ssam default: 455178354Ssam invalid: 456184268Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 457184268Ssam "%s: unexpected state transition %s -> %s\n", __func__, 458178354Ssam ieee80211_state_name[ostate], ieee80211_state_name[nstate]); 459178354Ssam break; 460178354Ssam } 461178354Ssam return 0; 462178354Ssam} 463178354Ssam 464178354Ssam/* 465178354Ssam * Return non-zero if the frame is an echo of a multicast 466178354Ssam * frame sent by ourself. The dir is known to be DSTODS. 467178354Ssam */ 468178354Ssamstatic __inline int 469178354Ssamisdstods_mcastecho(struct ieee80211vap *vap, const struct ieee80211_frame *wh) 470178354Ssam{ 471178354Ssam#define QWH4(wh) ((const struct ieee80211_qosframe_addr4 *)wh) 472178354Ssam#define WH4(wh) ((const struct ieee80211_frame_addr4 *)wh) 473178354Ssam const uint8_t *sa; 474178354Ssam 475178354Ssam KASSERT(vap->iv_opmode == IEEE80211_M_STA, ("wrong mode")); 476178354Ssam 477178354Ssam if (!IEEE80211_IS_MULTICAST(wh->i_addr3)) 478178354Ssam return 0; 479178354Ssam sa = IEEE80211_QOS_HAS_SEQ(wh) ? QWH4(wh)->i_addr4 : WH4(wh)->i_addr4; 480178354Ssam return IEEE80211_ADDR_EQ(sa, vap->iv_myaddr); 481178354Ssam#undef WH4 482178354Ssam#undef QWH4 483178354Ssam} 484178354Ssam 485178354Ssam/* 486178354Ssam * Return non-zero if the frame is an echo of a multicast 487178354Ssam * frame sent by ourself. The dir is known to be FROMDS. 488178354Ssam */ 489178354Ssamstatic __inline int 490178354Ssamisfromds_mcastecho(struct ieee80211vap *vap, const struct ieee80211_frame *wh) 491178354Ssam{ 492178354Ssam KASSERT(vap->iv_opmode == IEEE80211_M_STA, ("wrong mode")); 493178354Ssam 494178354Ssam if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) 495178354Ssam return 0; 496178354Ssam return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 497178354Ssam} 498178354Ssam 499178354Ssam/* 500178354Ssam * Decide if a received management frame should be 501178354Ssam * printed when debugging is enabled. This filters some 502178354Ssam * of the less interesting frames that come frequently 503178354Ssam * (e.g. beacons). 504178354Ssam */ 505178354Ssamstatic __inline int 506178354Ssamdoprint(struct ieee80211vap *vap, int subtype) 507178354Ssam{ 508178354Ssam switch (subtype) { 509178354Ssam case IEEE80211_FC0_SUBTYPE_BEACON: 510178354Ssam return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN); 511178354Ssam case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 512178354Ssam return 0; 513178354Ssam } 514178354Ssam return 1; 515178354Ssam} 516178354Ssam 517178354Ssam/* 518178354Ssam * Process a received frame. The node associated with the sender 519178354Ssam * should be supplied. If nothing was found in the node table then 520178354Ssam * the caller is assumed to supply a reference to iv_bss instead. 521178354Ssam * The RSSI and a timestamp are also supplied. The RSSI data is used 522178354Ssam * during AP scanning to select a AP to associate with; it can have 523178354Ssam * any units so long as values have consistent units and higher values 524178354Ssam * mean ``better signal''. The receive timestamp is currently not used 525178354Ssam * by the 802.11 layer. 526178354Ssam */ 527178354Ssamstatic int 528192468Ssamsta_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf) 529178354Ssam{ 530178354Ssam#define HAS_SEQ(type) ((type & 0x4) == 0) 531178354Ssam struct ieee80211vap *vap = ni->ni_vap; 532178354Ssam struct ieee80211com *ic = ni->ni_ic; 533178354Ssam struct ifnet *ifp = vap->iv_ifp; 534178354Ssam struct ieee80211_frame *wh; 535178354Ssam struct ieee80211_key *key; 536178354Ssam struct ether_header *eh; 537203422Srpaulo int hdrspace, need_tap = 1; /* mbuf need to be tapped. */ 538178354Ssam uint8_t dir, type, subtype, qos; 539178354Ssam uint8_t *bssid; 540178354Ssam uint16_t rxseq; 541178354Ssam 542183247Ssam if (m->m_flags & M_AMPDU_MPDU) { 543178354Ssam /* 544178354Ssam * Fastpath for A-MPDU reorder q resubmission. Frames 545183247Ssam * w/ M_AMPDU_MPDU marked have already passed through 546183247Ssam * here but were received out of order and been held on 547183247Ssam * the reorder queue. When resubmitted they are marked 548183247Ssam * with the M_AMPDU_MPDU flag and we can bypass most of 549183247Ssam * the normal processing. 550178354Ssam */ 551178354Ssam wh = mtod(m, struct ieee80211_frame *); 552178354Ssam type = IEEE80211_FC0_TYPE_DATA; 553178354Ssam dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 554178354Ssam subtype = IEEE80211_FC0_SUBTYPE_QOS; 555178354Ssam hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */ 556178354Ssam goto resubmit_ampdu; 557178354Ssam } 558178354Ssam 559178354Ssam KASSERT(ni != NULL, ("null node")); 560178354Ssam ni->ni_inact = ni->ni_inact_reload; 561178354Ssam 562178354Ssam type = -1; /* undefined */ 563178354Ssam 564178354Ssam if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 565178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 566178354Ssam ni->ni_macaddr, NULL, 567178354Ssam "too short (1): len %u", m->m_pkthdr.len); 568178354Ssam vap->iv_stats.is_rx_tooshort++; 569178354Ssam goto out; 570178354Ssam } 571178354Ssam /* 572178354Ssam * Bit of a cheat here, we use a pointer for a 3-address 573178354Ssam * frame format but don't reference fields past outside 574178354Ssam * ieee80211_frame_min w/o first validating the data is 575178354Ssam * present. 576178354Ssam */ 577178354Ssam wh = mtod(m, struct ieee80211_frame *); 578178354Ssam 579178354Ssam if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 580178354Ssam IEEE80211_FC0_VERSION_0) { 581178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 582191547Ssam ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x", 583191547Ssam wh->i_fc[0], wh->i_fc[1]); 584178354Ssam vap->iv_stats.is_rx_badversion++; 585178354Ssam goto err; 586178354Ssam } 587178354Ssam 588178354Ssam dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 589178354Ssam type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 590178354Ssam subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 591178354Ssam if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 592178354Ssam bssid = wh->i_addr2; 593178354Ssam if (!IEEE80211_ADDR_EQ(bssid, ni->ni_bssid)) { 594178354Ssam /* not interested in */ 595178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 596178354Ssam bssid, NULL, "%s", "not to bss"); 597178354Ssam vap->iv_stats.is_rx_wrongbss++; 598178354Ssam goto out; 599178354Ssam } 600227338Sadrian 601227338Sadrian /* 602227338Sadrian * Some devices may be in a promiscuous mode 603227338Sadrian * where they receive frames for multiple station 604227338Sadrian * addresses. 605227338Sadrian * 606227338Sadrian * If we receive a data frame that isn't 607227338Sadrian * destined to our VAP MAC, drop it. 608227338Sadrian * 609227338Sadrian * XXX TODO: This is only enforced when not scanning; 610227338Sadrian * XXX it assumes a software-driven scan will put the NIC 611227338Sadrian * XXX into a "no data frames" mode before setting this 612227338Sadrian * XXX flag. Otherwise it may be possible that we'll still 613227338Sadrian * XXX process data frames whilst scanning. 614227338Sadrian */ 615227338Sadrian if ((! IEEE80211_IS_MULTICAST(wh->i_addr1)) 616227338Sadrian && (! IEEE80211_ADDR_EQ(wh->i_addr1, IF_LLADDR(ifp)))) { 617227338Sadrian IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 618227338Sadrian bssid, NULL, "not to cur sta: lladdr=%6D, addr1=%6D", 619227338Sadrian IF_LLADDR(ifp), ":", wh->i_addr1, ":"); 620227338Sadrian vap->iv_stats.is_rx_wrongbss++; 621227338Sadrian goto out; 622227338Sadrian } 623227338Sadrian 624178354Ssam IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 625192468Ssam ni->ni_noise = nf; 626209022Savatar if (HAS_SEQ(type) && !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 627178354Ssam uint8_t tid = ieee80211_gettid(wh); 628178354Ssam if (IEEE80211_QOS_HAS_SEQ(wh) && 629178354Ssam TID_TO_WME_AC(tid) >= WME_AC_VI) 630178354Ssam ic->ic_wme.wme_hipri_traffic++; 631178354Ssam rxseq = le16toh(*(uint16_t *)wh->i_seq); 632221418Sadrian if (! ieee80211_check_rxseq(ni, wh)) { 633178354Ssam /* duplicate, discard */ 634178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 635178354Ssam bssid, "duplicate", 636178354Ssam "seqno <%u,%u> fragno <%u,%u> tid %u", 637178354Ssam rxseq >> IEEE80211_SEQ_SEQ_SHIFT, 638178354Ssam ni->ni_rxseqs[tid] >> 639178354Ssam IEEE80211_SEQ_SEQ_SHIFT, 640178354Ssam rxseq & IEEE80211_SEQ_FRAG_MASK, 641178354Ssam ni->ni_rxseqs[tid] & 642178354Ssam IEEE80211_SEQ_FRAG_MASK, 643178354Ssam tid); 644178354Ssam vap->iv_stats.is_rx_dup++; 645178354Ssam IEEE80211_NODE_STAT(ni, rx_dup); 646178354Ssam goto out; 647178354Ssam } 648178354Ssam ni->ni_rxseqs[tid] = rxseq; 649178354Ssam } 650178354Ssam } 651178354Ssam 652178354Ssam switch (type) { 653178354Ssam case IEEE80211_FC0_TYPE_DATA: 654178354Ssam hdrspace = ieee80211_hdrspace(ic, wh); 655178354Ssam if (m->m_len < hdrspace && 656178354Ssam (m = m_pullup(m, hdrspace)) == NULL) { 657178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 658178354Ssam ni->ni_macaddr, NULL, 659178354Ssam "data too short: expecting %u", hdrspace); 660178354Ssam vap->iv_stats.is_rx_tooshort++; 661178354Ssam goto out; /* XXX */ 662178354Ssam } 663178354Ssam /* 664183247Ssam * Handle A-MPDU re-ordering. If the frame is to be 665183247Ssam * processed directly then ieee80211_ampdu_reorder 666178354Ssam * will return 0; otherwise it has consumed the mbuf 667178354Ssam * and we should do nothing more with it. 668178354Ssam */ 669183247Ssam if ((m->m_flags & M_AMPDU) && 670178354Ssam (dir == IEEE80211_FC1_DIR_FROMDS || 671178354Ssam dir == IEEE80211_FC1_DIR_DSTODS) && 672178354Ssam ieee80211_ampdu_reorder(ni, m) != 0) { 673178354Ssam m = NULL; 674178354Ssam goto out; 675178354Ssam } 676178354Ssam resubmit_ampdu: 677178354Ssam if (dir == IEEE80211_FC1_DIR_FROMDS) { 678178354Ssam if ((ifp->if_flags & IFF_SIMPLEX) && 679178354Ssam isfromds_mcastecho(vap, wh)) { 680178354Ssam /* 681178354Ssam * In IEEE802.11 network, multicast 682178354Ssam * packets sent from "me" are broadcast 683178354Ssam * from the AP; silently discard for 684178354Ssam * SIMPLEX interface. 685178354Ssam */ 686178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 687178354Ssam wh, "data", "%s", "multicast echo"); 688178354Ssam vap->iv_stats.is_rx_mcastecho++; 689178354Ssam goto out; 690178354Ssam } 691178354Ssam if ((vap->iv_flags & IEEE80211_F_DWDS) && 692178354Ssam IEEE80211_IS_MULTICAST(wh->i_addr1)) { 693178354Ssam /* 694178354Ssam * DWDS sta's must drop 3-address mcast frames 695178354Ssam * as they will be sent separately as a 4-addr 696178354Ssam * frame. Accepting the 3-addr frame will 697178354Ssam * confuse the bridge into thinking the sending 698178354Ssam * sta is located at the end of WDS link. 699178354Ssam */ 700178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 701178354Ssam "3-address data", "%s", "DWDS enabled"); 702178354Ssam vap->iv_stats.is_rx_mcastecho++; 703178354Ssam goto out; 704178354Ssam } 705178354Ssam } else if (dir == IEEE80211_FC1_DIR_DSTODS) { 706178354Ssam if ((vap->iv_flags & IEEE80211_F_DWDS) == 0) { 707178354Ssam IEEE80211_DISCARD(vap, 708178354Ssam IEEE80211_MSG_INPUT, wh, "4-address data", 709178354Ssam "%s", "DWDS not enabled"); 710178354Ssam vap->iv_stats.is_rx_wrongdir++; 711178354Ssam goto out; 712178354Ssam } 713178354Ssam if ((ifp->if_flags & IFF_SIMPLEX) && 714178354Ssam isdstods_mcastecho(vap, wh)) { 715178354Ssam /* 716178354Ssam * In IEEE802.11 network, multicast 717178354Ssam * packets sent from "me" are broadcast 718178354Ssam * from the AP; silently discard for 719178354Ssam * SIMPLEX interface. 720178354Ssam */ 721178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 722178354Ssam "4-address data", "%s", "multicast echo"); 723178354Ssam vap->iv_stats.is_rx_mcastecho++; 724178354Ssam goto out; 725178354Ssam } 726178354Ssam } else { 727178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 728178354Ssam "data", "incorrect dir 0x%x", dir); 729178354Ssam vap->iv_stats.is_rx_wrongdir++; 730178354Ssam goto out; 731178354Ssam } 732178354Ssam 733178354Ssam /* 734178354Ssam * Handle privacy requirements. Note that we 735178354Ssam * must not be preempted from here until after 736178354Ssam * we (potentially) call ieee80211_crypto_demic; 737178354Ssam * otherwise we may violate assumptions in the 738178354Ssam * crypto cipher modules used to do delayed update 739178354Ssam * of replay sequence numbers. 740178354Ssam */ 741260444Skevlo if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 742178354Ssam if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 743178354Ssam /* 744178354Ssam * Discard encrypted frames when privacy is off. 745178354Ssam */ 746178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 747178354Ssam wh, "WEP", "%s", "PRIVACY off"); 748178354Ssam vap->iv_stats.is_rx_noprivacy++; 749178354Ssam IEEE80211_NODE_STAT(ni, rx_noprivacy); 750178354Ssam goto out; 751178354Ssam } 752178354Ssam key = ieee80211_crypto_decap(ni, m, hdrspace); 753178354Ssam if (key == NULL) { 754178354Ssam /* NB: stats+msgs handled in crypto_decap */ 755178354Ssam IEEE80211_NODE_STAT(ni, rx_wepfail); 756178354Ssam goto out; 757178354Ssam } 758178354Ssam wh = mtod(m, struct ieee80211_frame *); 759260444Skevlo wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; 760178354Ssam } else { 761178354Ssam /* XXX M_WEP and IEEE80211_F_PRIVACY */ 762178354Ssam key = NULL; 763178354Ssam } 764178354Ssam 765178354Ssam /* 766178354Ssam * Save QoS bits for use below--before we strip the header. 767178354Ssam */ 768178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_QOS) { 769178354Ssam qos = (dir == IEEE80211_FC1_DIR_DSTODS) ? 770178354Ssam ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] : 771178354Ssam ((struct ieee80211_qosframe *)wh)->i_qos[0]; 772178354Ssam } else 773178354Ssam qos = 0; 774178354Ssam 775178354Ssam /* 776178354Ssam * Next up, any fragmentation. 777178354Ssam */ 778178354Ssam if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 779178354Ssam m = ieee80211_defrag(ni, m, hdrspace); 780178354Ssam if (m == NULL) { 781178354Ssam /* Fragment dropped or frame not complete yet */ 782178354Ssam goto out; 783178354Ssam } 784178354Ssam } 785178354Ssam wh = NULL; /* no longer valid, catch any uses */ 786178354Ssam 787178354Ssam /* 788178354Ssam * Next strip any MSDU crypto bits. 789178354Ssam */ 790178354Ssam if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) { 791178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 792178354Ssam ni->ni_macaddr, "data", "%s", "demic error"); 793178354Ssam vap->iv_stats.is_rx_demicfail++; 794178354Ssam IEEE80211_NODE_STAT(ni, rx_demicfail); 795178354Ssam goto out; 796178354Ssam } 797178354Ssam 798178354Ssam /* copy to listener after decrypt */ 799192468Ssam if (ieee80211_radiotap_active_vap(vap)) 800202967Srpaulo ieee80211_radiotap_rx(vap, m); 801178354Ssam need_tap = 0; 802178354Ssam 803178354Ssam /* 804178354Ssam * Finally, strip the 802.11 header. 805178354Ssam */ 806178354Ssam m = ieee80211_decap(vap, m, hdrspace); 807178354Ssam if (m == NULL) { 808178354Ssam /* XXX mask bit to check for both */ 809178354Ssam /* don't count Null data frames as errors */ 810178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 811178354Ssam subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 812178354Ssam goto out; 813178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 814178354Ssam ni->ni_macaddr, "data", "%s", "decap error"); 815178354Ssam vap->iv_stats.is_rx_decap++; 816178354Ssam IEEE80211_NODE_STAT(ni, rx_decap); 817178354Ssam goto err; 818178354Ssam } 819178354Ssam eh = mtod(m, struct ether_header *); 820178354Ssam if (!ieee80211_node_is_authorized(ni)) { 821178354Ssam /* 822178354Ssam * Deny any non-PAE frames received prior to 823178354Ssam * authorization. For open/shared-key 824178354Ssam * authentication the port is mark authorized 825178354Ssam * after authentication completes. For 802.1x 826178354Ssam * the port is not marked authorized by the 827178354Ssam * authenticator until the handshake has completed. 828178354Ssam */ 829178354Ssam if (eh->ether_type != htons(ETHERTYPE_PAE)) { 830178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 831178354Ssam eh->ether_shost, "data", 832178354Ssam "unauthorized port: ether type 0x%x len %u", 833178354Ssam eh->ether_type, m->m_pkthdr.len); 834178354Ssam vap->iv_stats.is_rx_unauth++; 835178354Ssam IEEE80211_NODE_STAT(ni, rx_unauth); 836178354Ssam goto err; 837178354Ssam } 838178354Ssam } else { 839178354Ssam /* 840178354Ssam * When denying unencrypted frames, discard 841178354Ssam * any non-PAE frames received without encryption. 842178354Ssam */ 843178354Ssam if ((vap->iv_flags & IEEE80211_F_DROPUNENC) && 844178354Ssam (key == NULL && (m->m_flags & M_WEP) == 0) && 845178354Ssam eh->ether_type != htons(ETHERTYPE_PAE)) { 846178354Ssam /* 847178354Ssam * Drop unencrypted frames. 848178354Ssam */ 849178354Ssam vap->iv_stats.is_rx_unencrypted++; 850178354Ssam IEEE80211_NODE_STAT(ni, rx_unencrypted); 851178354Ssam goto out; 852178354Ssam } 853178354Ssam } 854178354Ssam /* XXX require HT? */ 855178354Ssam if (qos & IEEE80211_QOS_AMSDU) { 856178354Ssam m = ieee80211_decap_amsdu(ni, m); 857178354Ssam if (m == NULL) 858178354Ssam return IEEE80211_FC0_TYPE_DATA; 859190391Ssam } else { 860190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 861190391Ssam m = ieee80211_decap_fastframe(vap, ni, m); 862190391Ssam if (m == NULL) 863178354Ssam return IEEE80211_FC0_TYPE_DATA; 864190391Ssam#endif 865178354Ssam } 866178354Ssam ieee80211_deliver_data(vap, ni, m); 867178354Ssam return IEEE80211_FC0_TYPE_DATA; 868178354Ssam 869178354Ssam case IEEE80211_FC0_TYPE_MGT: 870178354Ssam vap->iv_stats.is_rx_mgmt++; 871178354Ssam IEEE80211_NODE_STAT(ni, rx_mgmt); 872178354Ssam if (dir != IEEE80211_FC1_DIR_NODS) { 873178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 874178354Ssam wh, "data", "incorrect dir 0x%x", dir); 875178354Ssam vap->iv_stats.is_rx_wrongdir++; 876178354Ssam goto err; 877178354Ssam } 878178354Ssam if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 879178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 880178354Ssam ni->ni_macaddr, "mgt", "too short: len %u", 881178354Ssam m->m_pkthdr.len); 882178354Ssam vap->iv_stats.is_rx_tooshort++; 883178354Ssam goto out; 884178354Ssam } 885178354Ssam#ifdef IEEE80211_DEBUG 886178354Ssam if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) || 887178354Ssam ieee80211_msg_dumppkts(vap)) { 888178354Ssam if_printf(ifp, "received %s from %s rssi %d\n", 889178354Ssam ieee80211_mgt_subtype_name[subtype >> 890178354Ssam IEEE80211_FC0_SUBTYPE_SHIFT], 891178354Ssam ether_sprintf(wh->i_addr2), rssi); 892178354Ssam } 893178354Ssam#endif 894260444Skevlo if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 895178354Ssam if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) { 896178354Ssam /* 897178354Ssam * Only shared key auth frames with a challenge 898178354Ssam * should be encrypted, discard all others. 899178354Ssam */ 900178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 901178354Ssam wh, ieee80211_mgt_subtype_name[subtype >> 902178354Ssam IEEE80211_FC0_SUBTYPE_SHIFT], 903178354Ssam "%s", "WEP set but not permitted"); 904178354Ssam vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 905178354Ssam goto out; 906178354Ssam } 907178354Ssam if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 908178354Ssam /* 909178354Ssam * Discard encrypted frames when privacy is off. 910178354Ssam */ 911178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 912178354Ssam wh, "mgt", "%s", "WEP set but PRIVACY off"); 913178354Ssam vap->iv_stats.is_rx_noprivacy++; 914178354Ssam goto out; 915178354Ssam } 916178354Ssam hdrspace = ieee80211_hdrspace(ic, wh); 917178354Ssam key = ieee80211_crypto_decap(ni, m, hdrspace); 918178354Ssam if (key == NULL) { 919178354Ssam /* NB: stats+msgs handled in crypto_decap */ 920178354Ssam goto out; 921178354Ssam } 922178354Ssam wh = mtod(m, struct ieee80211_frame *); 923260444Skevlo wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; 924178354Ssam } 925192468Ssam vap->iv_recv_mgmt(ni, m, subtype, rssi, nf); 926191534Ssam goto out; 927178354Ssam 928178354Ssam case IEEE80211_FC0_TYPE_CTL: 929178354Ssam vap->iv_stats.is_rx_ctl++; 930178354Ssam IEEE80211_NODE_STAT(ni, rx_ctrl); 931191546Ssam vap->iv_recv_ctl(ni, m, subtype); 932178354Ssam goto out; 933191549Ssam 934178354Ssam default: 935178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 936178354Ssam wh, NULL, "bad frame type 0x%x", type); 937178354Ssam /* should not come here */ 938178354Ssam break; 939178354Ssam } 940178354Ssamerr: 941178354Ssam ifp->if_ierrors++; 942178354Ssamout: 943178354Ssam if (m != NULL) { 944192765Ssam if (need_tap && ieee80211_radiotap_active_vap(vap)) 945192468Ssam ieee80211_radiotap_rx(vap, m); 946178354Ssam m_freem(m); 947178354Ssam } 948178354Ssam return type; 949178354Ssam} 950178354Ssam 951178354Ssamstatic void 952178354Ssamsta_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh, 953192468Ssam int rssi, int nf, uint16_t seq, uint16_t status) 954178354Ssam{ 955178354Ssam struct ieee80211vap *vap = ni->ni_vap; 956178354Ssam 957178354Ssam if (ni->ni_authmode == IEEE80211_AUTH_SHARED) { 958178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 959178354Ssam ni->ni_macaddr, "open auth", 960178354Ssam "bad sta auth mode %u", ni->ni_authmode); 961178354Ssam vap->iv_stats.is_rx_bad_auth++; /* XXX */ 962178354Ssam return; 963178354Ssam } 964178354Ssam if (vap->iv_state != IEEE80211_S_AUTH || 965178354Ssam seq != IEEE80211_AUTH_OPEN_RESPONSE) { 966178354Ssam vap->iv_stats.is_rx_bad_auth++; 967178354Ssam return; 968178354Ssam } 969178354Ssam if (status != 0) { 970178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, 971178354Ssam ni, "open auth failed (reason %d)", status); 972178354Ssam vap->iv_stats.is_rx_auth_fail++; 973178354Ssam vap->iv_stats.is_rx_authfail_code = status; 974178354Ssam ieee80211_new_state(vap, IEEE80211_S_SCAN, 975178354Ssam IEEE80211_SCAN_FAIL_STATUS); 976178354Ssam } else 977178354Ssam ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 978178354Ssam} 979178354Ssam 980178354Ssamstatic void 981178354Ssamsta_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh, 982192468Ssam uint8_t *frm, uint8_t *efrm, int rssi, int nf, 983178354Ssam uint16_t seq, uint16_t status) 984178354Ssam{ 985178354Ssam struct ieee80211vap *vap = ni->ni_vap; 986178354Ssam uint8_t *challenge; 987178354Ssam int estatus; 988178354Ssam 989178354Ssam /* 990178354Ssam * NB: this can happen as we allow pre-shared key 991178354Ssam * authentication to be enabled w/o wep being turned 992178354Ssam * on so that configuration of these can be done 993178354Ssam * in any order. It may be better to enforce the 994178354Ssam * ordering in which case this check would just be 995178354Ssam * for sanity/consistency. 996178354Ssam */ 997178354Ssam if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 998178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 999178354Ssam ni->ni_macaddr, "shared key auth", 1000178354Ssam "%s", " PRIVACY is disabled"); 1001178354Ssam estatus = IEEE80211_STATUS_ALG; 1002178354Ssam goto bad; 1003178354Ssam } 1004178354Ssam /* 1005178354Ssam * Pre-shared key authentication is evil; accept 1006178354Ssam * it only if explicitly configured (it is supported 1007178354Ssam * mainly for compatibility with clients like OS X). 1008178354Ssam */ 1009178354Ssam if (ni->ni_authmode != IEEE80211_AUTH_AUTO && 1010178354Ssam ni->ni_authmode != IEEE80211_AUTH_SHARED) { 1011178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1012178354Ssam ni->ni_macaddr, "shared key auth", 1013178354Ssam "bad sta auth mode %u", ni->ni_authmode); 1014178354Ssam vap->iv_stats.is_rx_bad_auth++; /* XXX maybe a unique error? */ 1015178354Ssam estatus = IEEE80211_STATUS_ALG; 1016178354Ssam goto bad; 1017178354Ssam } 1018178354Ssam 1019178354Ssam challenge = NULL; 1020178354Ssam if (frm + 1 < efrm) { 1021178354Ssam if ((frm[1] + 2) > (efrm - frm)) { 1022178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1023178354Ssam ni->ni_macaddr, "shared key auth", 1024178354Ssam "ie %d/%d too long", 1025178354Ssam frm[0], (frm[1] + 2) - (efrm - frm)); 1026178354Ssam vap->iv_stats.is_rx_bad_auth++; 1027178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1028178354Ssam goto bad; 1029178354Ssam } 1030178354Ssam if (*frm == IEEE80211_ELEMID_CHALLENGE) 1031178354Ssam challenge = frm; 1032178354Ssam frm += frm[1] + 2; 1033178354Ssam } 1034178354Ssam switch (seq) { 1035178354Ssam case IEEE80211_AUTH_SHARED_CHALLENGE: 1036178354Ssam case IEEE80211_AUTH_SHARED_RESPONSE: 1037178354Ssam if (challenge == NULL) { 1038178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1039178354Ssam ni->ni_macaddr, "shared key auth", 1040178354Ssam "%s", "no challenge"); 1041178354Ssam vap->iv_stats.is_rx_bad_auth++; 1042178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1043178354Ssam goto bad; 1044178354Ssam } 1045178354Ssam if (challenge[1] != IEEE80211_CHALLENGE_LEN) { 1046178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1047178354Ssam ni->ni_macaddr, "shared key auth", 1048178354Ssam "bad challenge len %d", challenge[1]); 1049178354Ssam vap->iv_stats.is_rx_bad_auth++; 1050178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1051178354Ssam goto bad; 1052178354Ssam } 1053178354Ssam default: 1054178354Ssam break; 1055178354Ssam } 1056178354Ssam if (vap->iv_state != IEEE80211_S_AUTH) 1057178354Ssam return; 1058178354Ssam switch (seq) { 1059178354Ssam case IEEE80211_AUTH_SHARED_PASS: 1060178354Ssam if (ni->ni_challenge != NULL) { 1061186302Ssam free(ni->ni_challenge, M_80211_NODE); 1062178354Ssam ni->ni_challenge = NULL; 1063178354Ssam } 1064178354Ssam if (status != 0) { 1065178354Ssam IEEE80211_NOTE_FRAME(vap, 1066178354Ssam IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, wh, 1067178354Ssam "shared key auth failed (reason %d)", status); 1068178354Ssam vap->iv_stats.is_rx_auth_fail++; 1069178354Ssam vap->iv_stats.is_rx_authfail_code = status; 1070178354Ssam return; 1071178354Ssam } 1072178354Ssam ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 1073178354Ssam break; 1074178354Ssam case IEEE80211_AUTH_SHARED_CHALLENGE: 1075178354Ssam if (!ieee80211_alloc_challenge(ni)) 1076178354Ssam return; 1077178354Ssam /* XXX could optimize by passing recvd challenge */ 1078178354Ssam memcpy(ni->ni_challenge, &challenge[2], challenge[1]); 1079178354Ssam IEEE80211_SEND_MGMT(ni, 1080178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, seq + 1); 1081178354Ssam break; 1082178354Ssam default: 1083178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_AUTH, 1084178354Ssam wh, "shared key auth", "bad seq %d", seq); 1085178354Ssam vap->iv_stats.is_rx_bad_auth++; 1086178354Ssam return; 1087178354Ssam } 1088178354Ssam return; 1089178354Ssambad: 1090178354Ssam /* 1091178354Ssam * Kick the state machine. This short-circuits 1092178354Ssam * using the mgt frame timeout to trigger the 1093178354Ssam * state transition. 1094178354Ssam */ 1095178354Ssam if (vap->iv_state == IEEE80211_S_AUTH) 1096178354Ssam ieee80211_new_state(vap, IEEE80211_S_SCAN, 1097178354Ssam IEEE80211_SCAN_FAIL_STATUS); 1098178354Ssam} 1099178354Ssam 1100244060Sadrianint 1101178354Ssamieee80211_parse_wmeparams(struct ieee80211vap *vap, uint8_t *frm, 1102178354Ssam const struct ieee80211_frame *wh) 1103178354Ssam{ 1104178354Ssam#define MS(_v, _f) (((_v) & _f) >> _f##_S) 1105178354Ssam struct ieee80211_wme_state *wme = &vap->iv_ic->ic_wme; 1106178354Ssam u_int len = frm[1], qosinfo; 1107178354Ssam int i; 1108178354Ssam 1109178354Ssam if (len < sizeof(struct ieee80211_wme_param)-2) { 1110178354Ssam IEEE80211_DISCARD_IE(vap, 1111178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WME, 1112178354Ssam wh, "WME", "too short, len %u", len); 1113178354Ssam return -1; 1114178354Ssam } 1115178354Ssam qosinfo = frm[__offsetof(struct ieee80211_wme_param, param_qosInfo)]; 1116178354Ssam qosinfo &= WME_QOSINFO_COUNT; 1117178354Ssam /* XXX do proper check for wraparound */ 1118178354Ssam if (qosinfo == wme->wme_wmeChanParams.cap_info) 1119178354Ssam return 0; 1120178354Ssam frm += __offsetof(struct ieee80211_wme_param, params_acParams); 1121178354Ssam for (i = 0; i < WME_NUM_AC; i++) { 1122178354Ssam struct wmeParams *wmep = 1123178354Ssam &wme->wme_wmeChanParams.cap_wmeParams[i]; 1124178354Ssam /* NB: ACI not used */ 1125178354Ssam wmep->wmep_acm = MS(frm[0], WME_PARAM_ACM); 1126178354Ssam wmep->wmep_aifsn = MS(frm[0], WME_PARAM_AIFSN); 1127178354Ssam wmep->wmep_logcwmin = MS(frm[1], WME_PARAM_LOGCWMIN); 1128178354Ssam wmep->wmep_logcwmax = MS(frm[1], WME_PARAM_LOGCWMAX); 1129178354Ssam wmep->wmep_txopLimit = LE_READ_2(frm+2); 1130178354Ssam frm += 4; 1131178354Ssam } 1132178354Ssam wme->wme_wmeChanParams.cap_info = qosinfo; 1133178354Ssam return 1; 1134178354Ssam#undef MS 1135178354Ssam} 1136178354Ssam 1137178354Ssam/* 1138193439Ssam * Process 11h Channel Switch Announcement (CSA) ie. If this 1139193439Ssam * is the first CSA then initiate the switch. Otherwise we 1140193439Ssam * track state and trigger completion and/or cancel of the switch. 1141193439Ssam * XXX should be public for IBSS use 1142193439Ssam */ 1143193439Ssamstatic void 1144193439Ssamieee80211_parse_csaparams(struct ieee80211vap *vap, uint8_t *frm, 1145193439Ssam const struct ieee80211_frame *wh) 1146193439Ssam{ 1147193439Ssam struct ieee80211com *ic = vap->iv_ic; 1148193439Ssam const struct ieee80211_csa_ie *csa = 1149193439Ssam (const struct ieee80211_csa_ie *) frm; 1150193439Ssam 1151193439Ssam KASSERT(vap->iv_state >= IEEE80211_S_RUN, 1152193439Ssam ("state %s", ieee80211_state_name[vap->iv_state])); 1153193439Ssam 1154193439Ssam if (csa->csa_mode > 1) { 1155193439Ssam IEEE80211_DISCARD_IE(vap, 1156193439Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1157193439Ssam wh, "CSA", "invalid mode %u", csa->csa_mode); 1158193439Ssam return; 1159193439Ssam } 1160193439Ssam IEEE80211_LOCK(ic); 1161193439Ssam if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 1162193439Ssam /* 1163193439Ssam * Convert the channel number to a channel reference. We 1164193439Ssam * try first to preserve turbo attribute of the current 1165193439Ssam * channel then fallback. Note this will not work if the 1166193439Ssam * CSA specifies a channel that requires a band switch (e.g. 1167193439Ssam * 11a => 11g). This is intentional as 11h is defined only 1168193439Ssam * for 5GHz/11a and because the switch does not involve a 1169193439Ssam * reassociation, protocol state (capabilities, negotated 1170193439Ssam * rates, etc) may/will be wrong. 1171193439Ssam */ 1172193439Ssam struct ieee80211_channel *c = 1173193439Ssam ieee80211_find_channel_byieee(ic, csa->csa_newchan, 1174193439Ssam (ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALLTURBO)); 1175193439Ssam if (c == NULL) { 1176193439Ssam c = ieee80211_find_channel_byieee(ic, 1177193439Ssam csa->csa_newchan, 1178193439Ssam (ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALL)); 1179193439Ssam if (c == NULL) { 1180193439Ssam IEEE80211_DISCARD_IE(vap, 1181193439Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1182193439Ssam wh, "CSA", "invalid channel %u", 1183193439Ssam csa->csa_newchan); 1184193439Ssam goto done; 1185193439Ssam } 1186193439Ssam } 1187193439Ssam#if IEEE80211_CSA_COUNT_MIN > 0 1188193439Ssam if (csa->csa_count < IEEE80211_CSA_COUNT_MIN) { 1189193439Ssam /* 1190193439Ssam * Require at least IEEE80211_CSA_COUNT_MIN count to 1191193439Ssam * reduce the risk of being redirected by a fabricated 1192193439Ssam * CSA. If a valid CSA is dropped we'll still get a 1193193439Ssam * beacon miss when the AP leaves the channel so we'll 1194193439Ssam * eventually follow to the new channel. 1195193439Ssam * 1196193439Ssam * NOTE: this violates the 11h spec that states that 1197193439Ssam * count may be any value and if 0 then a switch 1198193439Ssam * should happen asap. 1199193439Ssam */ 1200193439Ssam IEEE80211_DISCARD_IE(vap, 1201193439Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1202193439Ssam wh, "CSA", "count %u too small, must be >= %u", 1203193439Ssam csa->csa_count, IEEE80211_CSA_COUNT_MIN); 1204193439Ssam goto done; 1205193439Ssam } 1206193439Ssam#endif 1207193439Ssam ieee80211_csa_startswitch(ic, c, csa->csa_mode, csa->csa_count); 1208193439Ssam } else { 1209193439Ssam /* 1210193439Ssam * Validate this ie against the initial CSA. We require 1211193439Ssam * mode and channel not change and the count must be 1212193439Ssam * monotonically decreasing. This may be pointless and 1213193439Ssam * canceling the switch as a result may be too paranoid but 1214193439Ssam * in the worst case if we drop out of CSA because of this 1215193439Ssam * and the AP does move then we'll just end up taking a 1216193439Ssam * beacon miss and scan to find the AP. 1217193439Ssam * 1218193439Ssam * XXX may want <= on count as we also process ProbeResp 1219193439Ssam * frames and those may come in w/ the same count as the 1220193439Ssam * previous beacon; but doing so leaves us open to a stuck 1221193439Ssam * count until we add a dead-man timer 1222193439Ssam */ 1223193439Ssam if (!(csa->csa_count < ic->ic_csa_count && 1224193439Ssam csa->csa_mode == ic->ic_csa_mode && 1225193439Ssam csa->csa_newchan == ieee80211_chan2ieee(ic, ic->ic_csa_newchan))) { 1226193439Ssam IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_DOTH, wh, 1227193439Ssam "CSA ie mismatch, initial ie <%d,%d,%d>, " 1228193439Ssam "this ie <%d,%d,%d>", ic->ic_csa_mode, 1229193439Ssam ic->ic_csa_newchan, ic->ic_csa_count, 1230193439Ssam csa->csa_mode, csa->csa_newchan, csa->csa_count); 1231193439Ssam ieee80211_csa_cancelswitch(ic); 1232193439Ssam } else { 1233193439Ssam if (csa->csa_count <= 1) 1234193439Ssam ieee80211_csa_completeswitch(ic); 1235193439Ssam else 1236193439Ssam ic->ic_csa_count = csa->csa_count; 1237193439Ssam } 1238193439Ssam } 1239193439Ssamdone: 1240193439Ssam IEEE80211_UNLOCK(ic); 1241193439Ssam} 1242193439Ssam 1243193439Ssam/* 1244178354Ssam * Return non-zero if a background scan may be continued: 1245178354Ssam * o bg scan is active 1246178354Ssam * o no channel switch is pending 1247178354Ssam * o there has not been any traffic recently 1248178354Ssam * 1249178354Ssam * Note we do not check if there is an administrative enable; 1250178354Ssam * this is only done to start the scan. We assume that any 1251178354Ssam * change in state will be accompanied by a request to cancel 1252178354Ssam * active scans which will otherwise cause this test to fail. 1253178354Ssam */ 1254178354Ssamstatic __inline int 1255178354Ssamcontbgscan(struct ieee80211vap *vap) 1256178354Ssam{ 1257178354Ssam struct ieee80211com *ic = vap->iv_ic; 1258178354Ssam 1259178354Ssam return ((ic->ic_flags_ext & IEEE80211_FEXT_BGSCAN) && 1260178354Ssam (ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 && 1261178354Ssam vap->iv_state == IEEE80211_S_RUN && /* XXX? */ 1262178354Ssam time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle)); 1263178354Ssam} 1264178354Ssam 1265178354Ssam/* 1266178354Ssam * Return non-zero if a backgrond scan may be started: 1267178354Ssam * o bg scanning is administratively enabled 1268178354Ssam * o no channel switch is pending 1269178354Ssam * o we are not boosted on a dynamic turbo channel 1270178354Ssam * o there has not been a scan recently 1271178354Ssam * o there has not been any traffic recently 1272178354Ssam */ 1273178354Ssamstatic __inline int 1274178354Ssamstartbgscan(struct ieee80211vap *vap) 1275178354Ssam{ 1276178354Ssam struct ieee80211com *ic = vap->iv_ic; 1277178354Ssam 1278178354Ssam return ((vap->iv_flags & IEEE80211_F_BGSCAN) && 1279178354Ssam (ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 && 1280190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 1281178354Ssam !IEEE80211_IS_CHAN_DTURBO(ic->ic_curchan) && 1282190391Ssam#endif 1283178354Ssam time_after(ticks, ic->ic_lastscan + vap->iv_bgscanintvl) && 1284178354Ssam time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle)); 1285178354Ssam} 1286178354Ssam 1287178354Ssamstatic void 1288178354Ssamsta_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, 1289192468Ssam int subtype, int rssi, int nf) 1290178354Ssam{ 1291178354Ssam#define ISPROBE(_st) ((_st) == IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1292178354Ssam#define ISREASSOC(_st) ((_st) == IEEE80211_FC0_SUBTYPE_REASSOC_RESP) 1293178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1294178354Ssam struct ieee80211com *ic = ni->ni_ic; 1295178354Ssam struct ieee80211_frame *wh; 1296178354Ssam uint8_t *frm, *efrm; 1297178354Ssam uint8_t *rates, *xrates, *wme, *htcap, *htinfo; 1298178354Ssam uint8_t rate; 1299233452Sadrian int ht_state_change = 0; 1300178354Ssam 1301178354Ssam wh = mtod(m0, struct ieee80211_frame *); 1302178354Ssam frm = (uint8_t *)&wh[1]; 1303178354Ssam efrm = mtod(m0, uint8_t *) + m0->m_len; 1304178354Ssam switch (subtype) { 1305178354Ssam case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1306178354Ssam case IEEE80211_FC0_SUBTYPE_BEACON: { 1307178354Ssam struct ieee80211_scanparams scan; 1308178354Ssam /* 1309178354Ssam * We process beacon/probe response frames: 1310178354Ssam * o when scanning, or 1311178354Ssam * o station mode when associated (to collect state 1312191444Srpaulo * updates such as 802.11g slot time) 1313178354Ssam * Frames otherwise received are discarded. 1314178354Ssam */ 1315178354Ssam if (!((ic->ic_flags & IEEE80211_F_SCAN) || ni->ni_associd)) { 1316178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1317178354Ssam return; 1318178354Ssam } 1319178354Ssam /* XXX probe response in sta mode when !scanning? */ 1320232244Sadrian if (ieee80211_parse_beacon(ni, m0, &scan) != 0) { 1321232270Sadrian if (! (ic->ic_flags & IEEE80211_F_SCAN)) 1322232270Sadrian vap->iv_stats.is_beacon_bad++; 1323178354Ssam return; 1324232244Sadrian } 1325264855Sadrian 1326178354Ssam /* 1327178354Ssam * Count frame now that we know it's to be processed. 1328178354Ssam */ 1329178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1330178354Ssam vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1331178354Ssam IEEE80211_NODE_STAT(ni, rx_beacons); 1332178354Ssam } else 1333178354Ssam IEEE80211_NODE_STAT(ni, rx_proberesp); 1334178354Ssam /* 1335178354Ssam * When operating in station mode, check for state updates. 1336178354Ssam * Be careful to ignore beacons received while doing a 1337178354Ssam * background scan. We consider only 11g/WMM stuff right now. 1338178354Ssam */ 1339178354Ssam if (ni->ni_associd != 0 && 1340178354Ssam ((ic->ic_flags & IEEE80211_F_SCAN) == 0 || 1341178354Ssam IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_bssid))) { 1342178354Ssam /* record tsf of last beacon */ 1343178354Ssam memcpy(ni->ni_tstamp.data, scan.tstamp, 1344178354Ssam sizeof(ni->ni_tstamp)); 1345178354Ssam /* count beacon frame for s/w bmiss handling */ 1346178354Ssam vap->iv_swbmiss_count++; 1347178354Ssam vap->iv_bmiss_count = 0; 1348178354Ssam if (ni->ni_erp != scan.erp) { 1349178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1350178354Ssam wh->i_addr2, 1351178354Ssam "erp change: was 0x%x, now 0x%x", 1352178354Ssam ni->ni_erp, scan.erp); 1353178354Ssam if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 1354178354Ssam (ni->ni_erp & IEEE80211_ERP_USE_PROTECTION)) 1355178354Ssam ic->ic_flags |= IEEE80211_F_USEPROT; 1356178354Ssam else 1357178354Ssam ic->ic_flags &= ~IEEE80211_F_USEPROT; 1358178354Ssam ni->ni_erp = scan.erp; 1359178354Ssam /* XXX statistic */ 1360178354Ssam /* XXX driver notification */ 1361178354Ssam } 1362178354Ssam if ((ni->ni_capinfo ^ scan.capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME) { 1363178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1364178354Ssam wh->i_addr2, 1365178354Ssam "capabilities change: was 0x%x, now 0x%x", 1366178354Ssam ni->ni_capinfo, scan.capinfo); 1367178354Ssam /* 1368178354Ssam * NB: we assume short preamble doesn't 1369178354Ssam * change dynamically 1370178354Ssam */ 1371178354Ssam ieee80211_set_shortslottime(ic, 1372178354Ssam IEEE80211_IS_CHAN_A(ic->ic_bsschan) || 1373178354Ssam (scan.capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)); 1374178354Ssam ni->ni_capinfo = (ni->ni_capinfo &~ IEEE80211_CAPINFO_SHORT_SLOTTIME) 1375178354Ssam | (scan.capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME); 1376178354Ssam /* XXX statistic */ 1377178354Ssam } 1378178354Ssam if (scan.wme != NULL && 1379178354Ssam (ni->ni_flags & IEEE80211_NODE_QOS) && 1380178354Ssam ieee80211_parse_wmeparams(vap, scan.wme, wh) > 0) 1381178354Ssam ieee80211_wme_updateparams(vap); 1382190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 1383178354Ssam if (scan.ath != NULL) 1384178354Ssam ieee80211_parse_athparams(ni, scan.ath, wh); 1385190391Ssam#endif 1386183254Ssam if (scan.htcap != NULL && scan.htinfo != NULL && 1387193655Ssam (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1388178354Ssam /* XXX state changes? */ 1389233452Sadrian if (ieee80211_ht_updateparams(ni, 1390233452Sadrian scan.htcap, scan.htinfo)) 1391233452Sadrian ht_state_change = 1; 1392178354Ssam } 1393227331Sadrian if (scan.quiet) 1394227331Sadrian ic->ic_set_quiet(ni, scan.quiet); 1395264855Sadrian 1396178354Ssam if (scan.tim != NULL) { 1397178354Ssam struct ieee80211_tim_ie *tim = 1398178354Ssam (struct ieee80211_tim_ie *) scan.tim; 1399264855Sadrian /* 1400264855Sadrian * XXX Check/debug this code; see if it's about 1401264855Sadrian * the right time to force the VAP awake if we 1402264855Sadrian * receive a frame destined for us? 1403264855Sadrian */ 1404178354Ssam int aid = IEEE80211_AID(ni->ni_associd); 1405178354Ssam int ix = aid / NBBY; 1406178354Ssam int min = tim->tim_bitctl &~ 1; 1407178354Ssam int max = tim->tim_len + min - 4; 1408264855Sadrian 1409264855Sadrian /* 1410264855Sadrian * Only do this for unicast traffic in the TIM 1411264855Sadrian * The multicast traffic notification for 1412264855Sadrian * the scan notification stuff should occur 1413264855Sadrian * differently. 1414264855Sadrian */ 1415264855Sadrian if (min <= ix && ix <= max && 1416264855Sadrian isset(tim->tim_bitmap - min, aid)) { 1417264855Sadrian ieee80211_sta_tim_notify(vap, 1); 1418264855Sadrian ic->ic_lastdata = ticks; 1419264855Sadrian } 1420264855Sadrian 1421264855Sadrian /* 1422264855Sadrian * XXX TODO: do a separate notification 1423264855Sadrian * for the multicast bit being set. 1424264855Sadrian */ 1425264855Sadrian#if 0 1426264906Sadrian if (tim->tim_bitctl & 1) { 1427264855Sadrian ieee80211_sta_tim_notify(vap, 1); 1428178354Ssam ic->ic_lastdata = ticks; 1429178354Ssam } 1430178354Ssam#endif 1431264906Sadrian 1432178354Ssam ni->ni_dtim_count = tim->tim_count; 1433178354Ssam ni->ni_dtim_period = tim->tim_period; 1434178354Ssam } 1435193439Ssam if (scan.csa != NULL && 1436193439Ssam (vap->iv_flags & IEEE80211_F_DOTH)) 1437193439Ssam ieee80211_parse_csaparams(vap, scan.csa, wh); 1438193439Ssam else if (ic->ic_flags & IEEE80211_F_CSAPENDING) { 1439193439Ssam /* 1440193439Ssam * No CSA ie or 11h disabled, but a channel 1441193439Ssam * switch is pending; drop out so we aren't 1442193439Ssam * stuck in CSA state. If the AP really is 1443193439Ssam * moving we'll get a beacon miss and scan. 1444193439Ssam */ 1445193439Ssam IEEE80211_LOCK(ic); 1446193439Ssam ieee80211_csa_cancelswitch(ic); 1447193439Ssam IEEE80211_UNLOCK(ic); 1448193439Ssam } 1449178354Ssam /* 1450178354Ssam * If scanning, pass the info to the scan module. 1451178354Ssam * Otherwise, check if it's the right time to do 1452178354Ssam * a background scan. Background scanning must 1453178354Ssam * be enabled and we must not be operating in the 1454178354Ssam * turbo phase of dynamic turbo mode. Then, 1455178354Ssam * it's been a while since the last background 1456178354Ssam * scan and if no data frames have come through 1457178354Ssam * recently, kick off a scan. Note that this 1458178354Ssam * is the mechanism by which a background scan 1459178354Ssam * is started _and_ continued each time we 1460178354Ssam * return on-channel to receive a beacon from 1461178354Ssam * our ap. 1462178354Ssam */ 1463178354Ssam if (ic->ic_flags & IEEE80211_F_SCAN) { 1464178354Ssam ieee80211_add_scan(vap, &scan, wh, 1465192468Ssam subtype, rssi, nf); 1466178354Ssam } else if (contbgscan(vap)) { 1467178354Ssam ieee80211_bg_scan(vap, 0); 1468178354Ssam } else if (startbgscan(vap)) { 1469178354Ssam vap->iv_stats.is_scan_bg++; 1470178354Ssam#if 0 1471178354Ssam /* wakeup if we are sleeing */ 1472178354Ssam ieee80211_set_pwrsave(vap, 0); 1473178354Ssam#endif 1474178354Ssam ieee80211_bg_scan(vap, 0); 1475178354Ssam } 1476233452Sadrian 1477233452Sadrian /* 1478264855Sadrian * Put the station to sleep if we haven't seen 1479264855Sadrian * traffic in a while. 1480264855Sadrian */ 1481264855Sadrian IEEE80211_LOCK(ic); 1482264855Sadrian ieee80211_sta_ps_timer_check(vap); 1483264855Sadrian IEEE80211_UNLOCK(ic); 1484264855Sadrian 1485264855Sadrian /* 1486233452Sadrian * If we've had a channel width change (eg HT20<->HT40) 1487233452Sadrian * then schedule a delayed driver notification. 1488233452Sadrian */ 1489233452Sadrian if (ht_state_change) 1490233452Sadrian ieee80211_update_chw(ic); 1491178354Ssam return; 1492178354Ssam } 1493178354Ssam /* 1494178354Ssam * If scanning, just pass information to the scan module. 1495178354Ssam */ 1496178354Ssam if (ic->ic_flags & IEEE80211_F_SCAN) { 1497178354Ssam if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1498178354Ssam /* 1499178354Ssam * Actively scanning a channel marked passive; 1500178354Ssam * send a probe request now that we know there 1501178354Ssam * is 802.11 traffic present. 1502178354Ssam * 1503178354Ssam * XXX check if the beacon we recv'd gives 1504178354Ssam * us what we need and suppress the probe req 1505178354Ssam */ 1506178354Ssam ieee80211_probe_curchan(vap, 1); 1507178354Ssam ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1508178354Ssam } 1509192468Ssam ieee80211_add_scan(vap, &scan, wh, subtype, rssi, nf); 1510178354Ssam return; 1511178354Ssam } 1512178354Ssam break; 1513178354Ssam } 1514178354Ssam 1515178354Ssam case IEEE80211_FC0_SUBTYPE_AUTH: { 1516178354Ssam uint16_t algo, seq, status; 1517178354Ssam /* 1518178354Ssam * auth frame format 1519178354Ssam * [2] algorithm 1520178354Ssam * [2] sequence 1521178354Ssam * [2] status 1522178354Ssam * [tlv*] challenge 1523178354Ssam */ 1524178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return); 1525178354Ssam algo = le16toh(*(uint16_t *)frm); 1526178354Ssam seq = le16toh(*(uint16_t *)(frm + 2)); 1527178354Ssam status = le16toh(*(uint16_t *)(frm + 4)); 1528178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr2, 1529178354Ssam "recv auth frame with algorithm %d seq %d", algo, seq); 1530178354Ssam 1531178354Ssam if (vap->iv_flags & IEEE80211_F_COUNTERM) { 1532178354Ssam IEEE80211_DISCARD(vap, 1533178354Ssam IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO, 1534178354Ssam wh, "auth", "%s", "TKIP countermeasures enabled"); 1535178354Ssam vap->iv_stats.is_rx_auth_countermeasures++; 1536178354Ssam if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 1537178354Ssam ieee80211_send_error(ni, wh->i_addr2, 1538178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 1539178354Ssam IEEE80211_REASON_MIC_FAILURE); 1540178354Ssam } 1541178354Ssam return; 1542178354Ssam } 1543178354Ssam if (algo == IEEE80211_AUTH_ALG_SHARED) 1544192468Ssam sta_auth_shared(ni, wh, frm + 6, efrm, rssi, nf, 1545192468Ssam seq, status); 1546178354Ssam else if (algo == IEEE80211_AUTH_ALG_OPEN) 1547192468Ssam sta_auth_open(ni, wh, rssi, nf, seq, status); 1548178354Ssam else { 1549178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1550178354Ssam wh, "auth", "unsupported alg %d", algo); 1551178354Ssam vap->iv_stats.is_rx_auth_unsupported++; 1552178354Ssam return; 1553178354Ssam } 1554178354Ssam break; 1555178354Ssam } 1556178354Ssam 1557178354Ssam case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 1558178354Ssam case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: { 1559178354Ssam uint16_t capinfo, associd; 1560178354Ssam uint16_t status; 1561178354Ssam 1562178354Ssam if (vap->iv_state != IEEE80211_S_ASSOC) { 1563178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1564178354Ssam return; 1565178354Ssam } 1566178354Ssam 1567178354Ssam /* 1568178354Ssam * asresp frame format 1569178354Ssam * [2] capability information 1570178354Ssam * [2] status 1571178354Ssam * [2] association ID 1572178354Ssam * [tlv] supported rates 1573178354Ssam * [tlv] extended supported rates 1574178354Ssam * [tlv] WME 1575178354Ssam * [tlv] HT capabilities 1576178354Ssam * [tlv] HT info 1577178354Ssam */ 1578178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return); 1579178354Ssam ni = vap->iv_bss; 1580178354Ssam capinfo = le16toh(*(uint16_t *)frm); 1581178354Ssam frm += 2; 1582178354Ssam status = le16toh(*(uint16_t *)frm); 1583178354Ssam frm += 2; 1584178354Ssam if (status != 0) { 1585178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1586178354Ssam wh->i_addr2, "%sassoc failed (reason %d)", 1587178354Ssam ISREASSOC(subtype) ? "re" : "", status); 1588178354Ssam vap->iv_stats.is_rx_auth_fail++; /* XXX */ 1589178354Ssam return; 1590178354Ssam } 1591178354Ssam associd = le16toh(*(uint16_t *)frm); 1592178354Ssam frm += 2; 1593178354Ssam 1594178354Ssam rates = xrates = wme = htcap = htinfo = NULL; 1595178354Ssam while (efrm - frm > 1) { 1596178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 1597178354Ssam switch (*frm) { 1598178354Ssam case IEEE80211_ELEMID_RATES: 1599178354Ssam rates = frm; 1600178354Ssam break; 1601178354Ssam case IEEE80211_ELEMID_XRATES: 1602178354Ssam xrates = frm; 1603178354Ssam break; 1604178354Ssam case IEEE80211_ELEMID_HTCAP: 1605178354Ssam htcap = frm; 1606178354Ssam break; 1607178354Ssam case IEEE80211_ELEMID_HTINFO: 1608178354Ssam htinfo = frm; 1609178354Ssam break; 1610178354Ssam case IEEE80211_ELEMID_VENDOR: 1611178354Ssam if (iswmeoui(frm)) 1612178354Ssam wme = frm; 1613193655Ssam else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) { 1614178354Ssam /* 1615178354Ssam * Accept pre-draft HT ie's if the 1616178354Ssam * standard ones have not been seen. 1617178354Ssam */ 1618178354Ssam if (ishtcapoui(frm)) { 1619178354Ssam if (htcap == NULL) 1620178354Ssam htcap = frm; 1621178354Ssam } else if (ishtinfooui(frm)) { 1622178354Ssam if (htinfo == NULL) 1623219603Sbschmidt htinfo = frm; 1624178354Ssam } 1625178354Ssam } 1626178354Ssam /* XXX Atheros OUI support */ 1627178354Ssam break; 1628178354Ssam } 1629178354Ssam frm += frm[1] + 2; 1630178354Ssam } 1631178354Ssam 1632178354Ssam IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 1633178354Ssam if (xrates != NULL) 1634178354Ssam IEEE80211_VERIFY_ELEMENT(xrates, 1635178354Ssam IEEE80211_RATE_MAXSIZE - rates[1], return); 1636178354Ssam rate = ieee80211_setup_rates(ni, rates, xrates, 1637178354Ssam IEEE80211_F_JOIN | 1638178354Ssam IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1639178354Ssam IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1640178354Ssam if (rate & IEEE80211_RATE_BASIC) { 1641178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1642178354Ssam wh->i_addr2, 1643178354Ssam "%sassoc failed (rate set mismatch)", 1644178354Ssam ISREASSOC(subtype) ? "re" : ""); 1645178354Ssam vap->iv_stats.is_rx_assoc_norate++; 1646178354Ssam ieee80211_new_state(vap, IEEE80211_S_SCAN, 1647178354Ssam IEEE80211_SCAN_FAIL_STATUS); 1648178354Ssam return; 1649178354Ssam } 1650178354Ssam 1651178354Ssam ni->ni_capinfo = capinfo; 1652178354Ssam ni->ni_associd = associd; 1653178354Ssam if (ni->ni_jointime == 0) 1654178354Ssam ni->ni_jointime = time_uptime; 1655178354Ssam if (wme != NULL && 1656178354Ssam ieee80211_parse_wmeparams(vap, wme, wh) >= 0) { 1657178354Ssam ni->ni_flags |= IEEE80211_NODE_QOS; 1658178354Ssam ieee80211_wme_updateparams(vap); 1659178354Ssam } else 1660178354Ssam ni->ni_flags &= ~IEEE80211_NODE_QOS; 1661178354Ssam /* 1662178354Ssam * Setup HT state according to the negotiation. 1663178354Ssam * 1664178354Ssam * NB: shouldn't need to check if HT use is enabled but some 1665178354Ssam * ap's send back HT ie's even when we don't indicate we 1666178354Ssam * are HT capable in our AssocReq. 1667178354Ssam */ 1668178354Ssam if (htcap != NULL && htinfo != NULL && 1669193655Ssam (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1670183254Ssam ieee80211_ht_node_init(ni); 1671183254Ssam ieee80211_ht_updateparams(ni, htcap, htinfo); 1672178354Ssam ieee80211_setup_htrates(ni, htcap, 1673178354Ssam IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1674178354Ssam ieee80211_setup_basic_htrates(ni, htinfo); 1675193966Ssam ieee80211_node_setuptxparms(ni); 1676214894Sbschmidt ieee80211_ratectl_node_init(ni); 1677190579Ssam } else { 1678190579Ssam#ifdef IEEE80211_SUPPORT_SUPERG 1679190579Ssam if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_ATH)) 1680190579Ssam ieee80211_ff_node_init(ni); 1681190579Ssam#endif 1682178354Ssam } 1683178354Ssam /* 1684178354Ssam * Configure state now that we are associated. 1685178354Ssam * 1686178354Ssam * XXX may need different/additional driver callbacks? 1687178354Ssam */ 1688178354Ssam if (IEEE80211_IS_CHAN_A(ic->ic_curchan) || 1689178354Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) { 1690178354Ssam ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 1691178354Ssam ic->ic_flags &= ~IEEE80211_F_USEBARKER; 1692178354Ssam } else { 1693178354Ssam ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 1694178354Ssam ic->ic_flags |= IEEE80211_F_USEBARKER; 1695178354Ssam } 1696178354Ssam ieee80211_set_shortslottime(ic, 1697178354Ssam IEEE80211_IS_CHAN_A(ic->ic_curchan) || 1698178354Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)); 1699178354Ssam /* 1700178354Ssam * Honor ERP protection. 1701178354Ssam * 1702178354Ssam * NB: ni_erp should zero for non-11g operation. 1703178354Ssam */ 1704178354Ssam if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 1705178354Ssam (ni->ni_erp & IEEE80211_ERP_USE_PROTECTION)) 1706178354Ssam ic->ic_flags |= IEEE80211_F_USEPROT; 1707178354Ssam else 1708178354Ssam ic->ic_flags &= ~IEEE80211_F_USEPROT; 1709178354Ssam IEEE80211_NOTE_MAC(vap, 1710178354Ssam IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, wh->i_addr2, 1711183256Ssam "%sassoc success at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", 1712178354Ssam ISREASSOC(subtype) ? "re" : "", 1713178354Ssam IEEE80211_NODE_AID(ni), 1714178354Ssam ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 1715178354Ssam ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 1716178354Ssam ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "", 1717178354Ssam ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 1718178354Ssam ni->ni_flags & IEEE80211_NODE_HT ? 1719182834Ssam (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 1720178354Ssam ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 1721183255Ssam ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 1722183255Ssam ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 1723183256Ssam ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 1724178354Ssam IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 1725178354Ssam ", fast-frames" : "", 1726178354Ssam IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 1727178354Ssam ", turbo" : "" 1728178354Ssam ); 1729178354Ssam ieee80211_new_state(vap, IEEE80211_S_RUN, subtype); 1730178354Ssam break; 1731178354Ssam } 1732178354Ssam 1733178354Ssam case IEEE80211_FC0_SUBTYPE_DEAUTH: { 1734178354Ssam uint16_t reason; 1735178354Ssam 1736178354Ssam if (vap->iv_state == IEEE80211_S_SCAN) { 1737178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1738178354Ssam return; 1739178354Ssam } 1740178354Ssam if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { 1741178354Ssam /* NB: can happen when in promiscuous mode */ 1742178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1743178354Ssam break; 1744178354Ssam } 1745178354Ssam 1746178354Ssam /* 1747178354Ssam * deauth frame format 1748178354Ssam * [2] reason 1749178354Ssam */ 1750178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); 1751178354Ssam reason = le16toh(*(uint16_t *)frm); 1752178354Ssam 1753178354Ssam vap->iv_stats.is_rx_deauth++; 1754178354Ssam vap->iv_stats.is_rx_deauth_code = reason; 1755178354Ssam IEEE80211_NODE_STAT(ni, rx_deauth); 1756178354Ssam 1757178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 1758178354Ssam "recv deauthenticate (reason %d)", reason); 1759178354Ssam ieee80211_new_state(vap, IEEE80211_S_AUTH, 1760178354Ssam (reason << 8) | IEEE80211_FC0_SUBTYPE_DEAUTH); 1761178354Ssam break; 1762178354Ssam } 1763178354Ssam 1764178354Ssam case IEEE80211_FC0_SUBTYPE_DISASSOC: { 1765178354Ssam uint16_t reason; 1766178354Ssam 1767178354Ssam if (vap->iv_state != IEEE80211_S_RUN && 1768178354Ssam vap->iv_state != IEEE80211_S_ASSOC && 1769178354Ssam vap->iv_state != IEEE80211_S_AUTH) { 1770178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1771178354Ssam return; 1772178354Ssam } 1773178354Ssam if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { 1774178354Ssam /* NB: can happen when in promiscuous mode */ 1775178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1776178354Ssam break; 1777178354Ssam } 1778178354Ssam 1779178354Ssam /* 1780178354Ssam * disassoc frame format 1781178354Ssam * [2] reason 1782178354Ssam */ 1783178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); 1784178354Ssam reason = le16toh(*(uint16_t *)frm); 1785178354Ssam 1786178354Ssam vap->iv_stats.is_rx_disassoc++; 1787178354Ssam vap->iv_stats.is_rx_disassoc_code = reason; 1788178354Ssam IEEE80211_NODE_STAT(ni, rx_disassoc); 1789178354Ssam 1790178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 1791178354Ssam "recv disassociate (reason %d)", reason); 1792178354Ssam ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 1793178354Ssam break; 1794178354Ssam } 1795178354Ssam 1796178354Ssam case IEEE80211_FC0_SUBTYPE_ACTION: 1797218927Sbschmidt case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 1798218958Sbschmidt if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 1799218958Sbschmidt !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1800218927Sbschmidt IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1801218958Sbschmidt wh, NULL, "%s", "not for us"); 1802218958Sbschmidt vap->iv_stats.is_rx_mgtdiscard++; 1803218958Sbschmidt } else if (vap->iv_state != IEEE80211_S_RUN) { 1804218958Sbschmidt IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1805218927Sbschmidt wh, NULL, "wrong state %s", 1806218927Sbschmidt ieee80211_state_name[vap->iv_state]); 1807178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1808218958Sbschmidt } else { 1809218958Sbschmidt if (ieee80211_parse_action(ni, m0) == 0) 1810218958Sbschmidt (void)ic->ic_recv_action(ni, wh, frm, efrm); 1811218927Sbschmidt } 1812178354Ssam break; 1813178354Ssam 1814178354Ssam case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 1815178354Ssam case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 1816218927Sbschmidt case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 1817218927Sbschmidt case IEEE80211_FC0_SUBTYPE_ATIM: 1818218927Sbschmidt IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1819218927Sbschmidt wh, NULL, "%s", "not handled"); 1820178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1821218927Sbschmidt break; 1822218927Sbschmidt 1823178354Ssam default: 1824178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1825218927Sbschmidt wh, "mgt", "subtype 0x%x not handled", subtype); 1826178354Ssam vap->iv_stats.is_rx_badsubtype++; 1827178354Ssam break; 1828178354Ssam } 1829178354Ssam#undef ISREASSOC 1830178354Ssam#undef ISPROBE 1831178354Ssam} 1832191546Ssam 1833191546Ssamstatic void 1834205277Srpaulosta_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 1835191546Ssam{ 1836205277Srpaulo switch (subtype) { 1837205277Srpaulo case IEEE80211_FC0_SUBTYPE_BAR: 1838205277Srpaulo ieee80211_recv_bar(ni, m); 1839205277Srpaulo break; 1840205277Srpaulo } 1841191546Ssam} 1842