ieee80211_sta.c revision 232270
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 232270 2012-02-28 21:43:29Z 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> 66178354Ssam 67178354Ssam#define IEEE80211_RATE2MBS(r) (((r) & IEEE80211_RATE_VAL) / 2) 68178354Ssam 69178354Ssamstatic void sta_vattach(struct ieee80211vap *); 70178354Ssamstatic void sta_beacon_miss(struct ieee80211vap *); 71178354Ssamstatic int sta_newstate(struct ieee80211vap *, enum ieee80211_state, int); 72192468Ssamstatic int sta_input(struct ieee80211_node *, struct mbuf *, int, int); 73178354Ssamstatic void sta_recv_mgmt(struct ieee80211_node *, struct mbuf *, 74192468Ssam int subtype, int rssi, int nf); 75191546Ssamstatic void sta_recv_ctl(struct ieee80211_node *, struct mbuf *, int subtype); 76178354Ssam 77178354Ssamvoid 78178354Ssamieee80211_sta_attach(struct ieee80211com *ic) 79178354Ssam{ 80178354Ssam ic->ic_vattach[IEEE80211_M_STA] = sta_vattach; 81178354Ssam} 82178354Ssam 83178354Ssamvoid 84178354Ssamieee80211_sta_detach(struct ieee80211com *ic) 85178354Ssam{ 86178354Ssam} 87178354Ssam 88178354Ssamstatic void 89178354Ssamsta_vdetach(struct ieee80211vap *vap) 90178354Ssam{ 91178354Ssam} 92178354Ssam 93178354Ssamstatic void 94178354Ssamsta_vattach(struct ieee80211vap *vap) 95178354Ssam{ 96178354Ssam vap->iv_newstate = sta_newstate; 97178354Ssam vap->iv_input = sta_input; 98178354Ssam vap->iv_recv_mgmt = sta_recv_mgmt; 99191546Ssam vap->iv_recv_ctl = sta_recv_ctl; 100178354Ssam vap->iv_opdetach = sta_vdetach; 101178354Ssam vap->iv_bmiss = sta_beacon_miss; 102178354Ssam} 103178354Ssam 104178354Ssam/* 105178354Ssam * Handle a beacon miss event. The common code filters out 106178354Ssam * spurious events that can happen when scanning and/or before 107178354Ssam * reaching RUN state. 108178354Ssam */ 109178354Ssamstatic void 110178354Ssamsta_beacon_miss(struct ieee80211vap *vap) 111178354Ssam{ 112193439Ssam struct ieee80211com *ic = vap->iv_ic; 113178354Ssam 114225913Sadrian IEEE80211_LOCK_ASSERT(ic); 115225913Sadrian 116193439Ssam KASSERT((ic->ic_flags & IEEE80211_F_SCAN) == 0, ("scanning")); 117193439Ssam KASSERT(vap->iv_state >= IEEE80211_S_RUN, 118193439Ssam ("wrong state %s", ieee80211_state_name[vap->iv_state])); 119178354Ssam 120193439Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG, 121193439Ssam "beacon miss, mode %s state %s\n", 122193439Ssam ieee80211_opmode_name[vap->iv_opmode], 123193439Ssam ieee80211_state_name[vap->iv_state]); 124193439Ssam 125193439Ssam if (vap->iv_state == IEEE80211_S_CSA) { 126193439Ssam /* 127193439Ssam * A Channel Switch is pending; assume we missed the 128193439Ssam * beacon that would've completed the process and just 129193439Ssam * force the switch. If we made a mistake we'll not 130193439Ssam * find the AP on the new channel and fall back to a 131193439Ssam * normal scan. 132193439Ssam */ 133193439Ssam ieee80211_csa_completeswitch(ic); 134193439Ssam return; 135193439Ssam } 136178354Ssam if (++vap->iv_bmiss_count < vap->iv_bmiss_max) { 137178354Ssam /* 138178354Ssam * Send a directed probe req before falling back to a 139178354Ssam * scan; if we receive a response ic_bmiss_count will 140178354Ssam * be reset. Some cards mistakenly report beacon miss 141178354Ssam * so this avoids the expensive scan if the ap is 142178354Ssam * still there. 143178354Ssam */ 144178354Ssam ieee80211_send_probereq(vap->iv_bss, vap->iv_myaddr, 145178354Ssam vap->iv_bss->ni_bssid, vap->iv_bss->ni_bssid, 146178354Ssam vap->iv_bss->ni_essid, vap->iv_bss->ni_esslen); 147178354Ssam return; 148178354Ssam } 149205140Sweongyo 150205140Sweongyo callout_stop(&vap->iv_swbmiss); 151178354Ssam vap->iv_bmiss_count = 0; 152178354Ssam vap->iv_stats.is_beacon_miss++; 153178354Ssam if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { 154190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 155190402Ssam struct ieee80211com *ic = vap->iv_ic; 156190402Ssam 157178354Ssam /* 158178354Ssam * If we receive a beacon miss interrupt when using 159178354Ssam * dynamic turbo, attempt to switch modes before 160178354Ssam * reassociating. 161178354Ssam */ 162178354Ssam if (IEEE80211_ATH_CAP(vap, vap->iv_bss, IEEE80211_NODE_TURBOP)) 163178354Ssam ieee80211_dturbo_switch(vap, 164178354Ssam ic->ic_bsschan->ic_flags ^ IEEE80211_CHAN_TURBO); 165190391Ssam#endif 166178354Ssam /* 167178354Ssam * Try to reassociate before scanning for a new ap. 168178354Ssam */ 169178354Ssam ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1); 170178354Ssam } else { 171178354Ssam /* 172178354Ssam * Somebody else is controlling state changes (e.g. 173178354Ssam * a user-mode app) don't do anything that would 174178354Ssam * confuse them; just drop into scan mode so they'll 175178354Ssam * notified of the state change and given control. 176178354Ssam */ 177178354Ssam ieee80211_new_state(vap, IEEE80211_S_SCAN, 0); 178178354Ssam } 179178354Ssam} 180178354Ssam 181178354Ssam/* 182178354Ssam * Handle deauth with reason. We retry only for 183178354Ssam * the cases where we might succeed. Otherwise 184178354Ssam * we downgrade the ap and scan. 185178354Ssam */ 186178354Ssamstatic void 187178354Ssamsta_authretry(struct ieee80211vap *vap, struct ieee80211_node *ni, int reason) 188178354Ssam{ 189178354Ssam switch (reason) { 190178354Ssam case IEEE80211_STATUS_SUCCESS: /* NB: MLME assoc */ 191178354Ssam case IEEE80211_STATUS_TIMEOUT: 192178354Ssam case IEEE80211_REASON_ASSOC_EXPIRE: 193178354Ssam case IEEE80211_REASON_NOT_AUTHED: 194178354Ssam case IEEE80211_REASON_NOT_ASSOCED: 195178354Ssam case IEEE80211_REASON_ASSOC_LEAVE: 196178354Ssam case IEEE80211_REASON_ASSOC_NOT_AUTHED: 197178354Ssam IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, 1); 198178354Ssam break; 199178354Ssam default: 200178354Ssam ieee80211_scan_assoc_fail(vap, vap->iv_bss->ni_macaddr, reason); 201178354Ssam if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) 202178354Ssam ieee80211_check_scan_current(vap); 203178354Ssam break; 204178354Ssam } 205178354Ssam} 206178354Ssam 207178354Ssam/* 208178354Ssam * IEEE80211_M_STA vap state machine handler. 209178354Ssam * This routine handles the main states in the 802.11 protocol. 210178354Ssam */ 211178354Ssamstatic int 212178354Ssamsta_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg) 213178354Ssam{ 214178354Ssam struct ieee80211com *ic = vap->iv_ic; 215178354Ssam struct ieee80211_node *ni; 216178354Ssam enum ieee80211_state ostate; 217178354Ssam 218178354Ssam IEEE80211_LOCK_ASSERT(ic); 219178354Ssam 220178354Ssam ostate = vap->iv_state; 221178354Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n", 222178354Ssam __func__, ieee80211_state_name[ostate], 223178354Ssam ieee80211_state_name[nstate], arg); 224178354Ssam vap->iv_state = nstate; /* state transition */ 225178354Ssam callout_stop(&vap->iv_mgtsend); /* XXX callout_drain */ 226178354Ssam if (ostate != IEEE80211_S_SCAN) 227178354Ssam ieee80211_cancel_scan(vap); /* background scan */ 228178354Ssam ni = vap->iv_bss; /* NB: no reference held */ 229178354Ssam if (vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS) 230178354Ssam callout_stop(&vap->iv_swbmiss); 231178354Ssam switch (nstate) { 232178354Ssam case IEEE80211_S_INIT: 233178354Ssam switch (ostate) { 234178354Ssam case IEEE80211_S_SLEEP: 235178354Ssam /* XXX wakeup */ 236178354Ssam case IEEE80211_S_RUN: 237178354Ssam IEEE80211_SEND_MGMT(ni, 238178354Ssam IEEE80211_FC0_SUBTYPE_DISASSOC, 239178354Ssam IEEE80211_REASON_ASSOC_LEAVE); 240178354Ssam ieee80211_sta_leave(ni); 241178354Ssam break; 242178354Ssam case IEEE80211_S_ASSOC: 243178354Ssam IEEE80211_SEND_MGMT(ni, 244178354Ssam IEEE80211_FC0_SUBTYPE_DEAUTH, 245178354Ssam IEEE80211_REASON_AUTH_LEAVE); 246178354Ssam break; 247178354Ssam case IEEE80211_S_SCAN: 248178354Ssam ieee80211_cancel_scan(vap); 249178354Ssam break; 250178354Ssam default: 251178354Ssam goto invalid; 252178354Ssam } 253178354Ssam if (ostate != IEEE80211_S_INIT) { 254178354Ssam /* NB: optimize INIT -> INIT case */ 255178354Ssam ieee80211_reset_bss(vap); 256178354Ssam } 257178354Ssam if (vap->iv_auth->ia_detach != NULL) 258178354Ssam vap->iv_auth->ia_detach(vap); 259178354Ssam break; 260178354Ssam case IEEE80211_S_SCAN: 261178354Ssam switch (ostate) { 262178354Ssam case IEEE80211_S_INIT: 263178354Ssam /* 264178354Ssam * Initiate a scan. We can come here as a result 265178354Ssam * of an IEEE80211_IOC_SCAN_REQ too in which case 266178354Ssam * the vap will be marked with IEEE80211_FEXT_SCANREQ 267178354Ssam * and the scan request parameters will be present 268178354Ssam * in iv_scanreq. Otherwise we do the default. 269178354Ssam */ 270178354Ssam if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 271178354Ssam ieee80211_check_scan(vap, 272178354Ssam vap->iv_scanreq_flags, 273178354Ssam vap->iv_scanreq_duration, 274178354Ssam vap->iv_scanreq_mindwell, 275178354Ssam vap->iv_scanreq_maxdwell, 276178354Ssam vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 277178354Ssam vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 278178354Ssam } else 279178354Ssam ieee80211_check_scan_current(vap); 280178354Ssam break; 281178354Ssam case IEEE80211_S_SCAN: 282178354Ssam case IEEE80211_S_AUTH: 283178354Ssam case IEEE80211_S_ASSOC: 284178354Ssam /* 285178354Ssam * These can happen either because of a timeout 286178354Ssam * on an assoc/auth response or because of a 287178354Ssam * change in state that requires a reset. For 288178354Ssam * the former we're called with a non-zero arg 289178354Ssam * that is the cause for the failure; pass this 290178354Ssam * to the scan code so it can update state. 291178354Ssam * Otherwise trigger a new scan unless we're in 292178354Ssam * manual roaming mode in which case an application 293178354Ssam * must issue an explicit scan request. 294178354Ssam */ 295178354Ssam if (arg != 0) 296178354Ssam ieee80211_scan_assoc_fail(vap, 297178354Ssam vap->iv_bss->ni_macaddr, arg); 298178354Ssam if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) 299178354Ssam ieee80211_check_scan_current(vap); 300178354Ssam break; 301178354Ssam case IEEE80211_S_RUN: /* beacon miss */ 302178354Ssam /* 303178354Ssam * Beacon miss. Notify user space and if not 304178354Ssam * under control of a user application (roaming 305178354Ssam * manual) kick off a scan to re-connect. 306178354Ssam */ 307178354Ssam ieee80211_sta_leave(ni); 308178354Ssam if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) 309178354Ssam ieee80211_check_scan_current(vap); 310178354Ssam break; 311178354Ssam default: 312178354Ssam goto invalid; 313178354Ssam } 314178354Ssam break; 315178354Ssam case IEEE80211_S_AUTH: 316178354Ssam switch (ostate) { 317178354Ssam case IEEE80211_S_INIT: 318178354Ssam case IEEE80211_S_SCAN: 319178354Ssam IEEE80211_SEND_MGMT(ni, 320178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 1); 321178354Ssam break; 322178354Ssam case IEEE80211_S_AUTH: 323178354Ssam case IEEE80211_S_ASSOC: 324178354Ssam switch (arg & 0xff) { 325178354Ssam case IEEE80211_FC0_SUBTYPE_AUTH: 326178354Ssam /* ??? */ 327178354Ssam IEEE80211_SEND_MGMT(ni, 328178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 2); 329178354Ssam break; 330178354Ssam case IEEE80211_FC0_SUBTYPE_DEAUTH: 331178354Ssam sta_authretry(vap, ni, arg>>8); 332178354Ssam break; 333178354Ssam } 334178354Ssam break; 335178354Ssam case IEEE80211_S_RUN: 336178354Ssam switch (arg & 0xff) { 337178354Ssam case IEEE80211_FC0_SUBTYPE_AUTH: 338178354Ssam IEEE80211_SEND_MGMT(ni, 339178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 2); 340178354Ssam vap->iv_state = ostate; /* stay RUN */ 341178354Ssam break; 342178354Ssam case IEEE80211_FC0_SUBTYPE_DEAUTH: 343178354Ssam ieee80211_sta_leave(ni); 344178354Ssam if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { 345178354Ssam /* try to reauth */ 346178354Ssam IEEE80211_SEND_MGMT(ni, 347178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 1); 348178354Ssam } 349178354Ssam break; 350178354Ssam } 351178354Ssam break; 352178354Ssam default: 353178354Ssam goto invalid; 354178354Ssam } 355178354Ssam break; 356178354Ssam case IEEE80211_S_ASSOC: 357178354Ssam switch (ostate) { 358178354Ssam case IEEE80211_S_AUTH: 359178354Ssam case IEEE80211_S_ASSOC: 360178354Ssam IEEE80211_SEND_MGMT(ni, 361178354Ssam IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0); 362178354Ssam break; 363178354Ssam case IEEE80211_S_SLEEP: /* cannot happen */ 364178354Ssam case IEEE80211_S_RUN: 365178354Ssam ieee80211_sta_leave(ni); 366178354Ssam if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { 367178354Ssam IEEE80211_SEND_MGMT(ni, arg ? 368178354Ssam IEEE80211_FC0_SUBTYPE_REASSOC_REQ : 369178354Ssam IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0); 370178354Ssam } 371178354Ssam break; 372178354Ssam default: 373178354Ssam goto invalid; 374178354Ssam } 375178354Ssam break; 376178354Ssam case IEEE80211_S_RUN: 377178354Ssam if (vap->iv_flags & IEEE80211_F_WPA) { 378178354Ssam /* XXX validate prerequisites */ 379178354Ssam } 380178354Ssam switch (ostate) { 381178354Ssam case IEEE80211_S_RUN: 382193439Ssam case IEEE80211_S_CSA: 383178354Ssam break; 384178354Ssam case IEEE80211_S_AUTH: /* when join is done in fw */ 385178354Ssam case IEEE80211_S_ASSOC: 386178354Ssam#ifdef IEEE80211_DEBUG 387178354Ssam if (ieee80211_msg_debug(vap)) { 388178354Ssam ieee80211_note(vap, "%s with %s ssid ", 389178354Ssam (vap->iv_opmode == IEEE80211_M_STA ? 390178354Ssam "associated" : "synchronized"), 391178354Ssam ether_sprintf(ni->ni_bssid)); 392178354Ssam ieee80211_print_essid(vap->iv_bss->ni_essid, 393178354Ssam ni->ni_esslen); 394178354Ssam /* XXX MCS/HT */ 395178354Ssam printf(" channel %d start %uMb\n", 396178354Ssam ieee80211_chan2ieee(ic, ic->ic_curchan), 397178354Ssam IEEE80211_RATE2MBS(ni->ni_txrate)); 398178354Ssam } 399178354Ssam#endif 400178354Ssam ieee80211_scan_assoc_success(vap, ni->ni_macaddr); 401178354Ssam ieee80211_notify_node_join(ni, 402178354Ssam arg == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 403178354Ssam break; 404178354Ssam case IEEE80211_S_SLEEP: 405178354Ssam ieee80211_sta_pwrsave(vap, 0); 406178354Ssam break; 407178354Ssam default: 408178354Ssam goto invalid; 409178354Ssam } 410178354Ssam ieee80211_sync_curchan(ic); 411178354Ssam if (ostate != IEEE80211_S_RUN && 412178354Ssam (vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS)) { 413178354Ssam /* 414178354Ssam * Start s/w beacon miss timer for devices w/o 415178354Ssam * hardware support. We fudge a bit here since 416178354Ssam * we're doing this in software. 417178354Ssam */ 418178354Ssam vap->iv_swbmiss_period = IEEE80211_TU_TO_TICKS( 419178354Ssam 2 * vap->iv_bmissthreshold * ni->ni_intval); 420178354Ssam vap->iv_swbmiss_count = 0; 421178354Ssam callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period, 422178354Ssam ieee80211_swbmiss, vap); 423178354Ssam } 424178354Ssam /* 425178354Ssam * When 802.1x is not in use mark the port authorized 426178354Ssam * at this point so traffic can flow. 427178354Ssam */ 428178354Ssam if (ni->ni_authmode != IEEE80211_AUTH_8021X) 429178354Ssam ieee80211_node_authorize(ni); 430184345Ssam /* 431184345Ssam * Fake association when joining an existing bss. 432184345Ssam */ 433184345Ssam if (ic->ic_newassoc != NULL) 434184345Ssam ic->ic_newassoc(vap->iv_bss, ostate != IEEE80211_S_RUN); 435178354Ssam break; 436193439Ssam case IEEE80211_S_CSA: 437193439Ssam if (ostate != IEEE80211_S_RUN) 438193439Ssam goto invalid; 439193439Ssam break; 440178354Ssam case IEEE80211_S_SLEEP: 441196783Ssam ieee80211_sta_pwrsave(vap, 1); 442178354Ssam break; 443178354Ssam default: 444178354Ssam invalid: 445184268Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 446184268Ssam "%s: unexpected state transition %s -> %s\n", __func__, 447178354Ssam ieee80211_state_name[ostate], ieee80211_state_name[nstate]); 448178354Ssam break; 449178354Ssam } 450178354Ssam return 0; 451178354Ssam} 452178354Ssam 453178354Ssam/* 454178354Ssam * Return non-zero if the frame is an echo of a multicast 455178354Ssam * frame sent by ourself. The dir is known to be DSTODS. 456178354Ssam */ 457178354Ssamstatic __inline int 458178354Ssamisdstods_mcastecho(struct ieee80211vap *vap, const struct ieee80211_frame *wh) 459178354Ssam{ 460178354Ssam#define QWH4(wh) ((const struct ieee80211_qosframe_addr4 *)wh) 461178354Ssam#define WH4(wh) ((const struct ieee80211_frame_addr4 *)wh) 462178354Ssam const uint8_t *sa; 463178354Ssam 464178354Ssam KASSERT(vap->iv_opmode == IEEE80211_M_STA, ("wrong mode")); 465178354Ssam 466178354Ssam if (!IEEE80211_IS_MULTICAST(wh->i_addr3)) 467178354Ssam return 0; 468178354Ssam sa = IEEE80211_QOS_HAS_SEQ(wh) ? QWH4(wh)->i_addr4 : WH4(wh)->i_addr4; 469178354Ssam return IEEE80211_ADDR_EQ(sa, vap->iv_myaddr); 470178354Ssam#undef WH4 471178354Ssam#undef QWH4 472178354Ssam} 473178354Ssam 474178354Ssam/* 475178354Ssam * Return non-zero if the frame is an echo of a multicast 476178354Ssam * frame sent by ourself. The dir is known to be FROMDS. 477178354Ssam */ 478178354Ssamstatic __inline int 479178354Ssamisfromds_mcastecho(struct ieee80211vap *vap, const struct ieee80211_frame *wh) 480178354Ssam{ 481178354Ssam KASSERT(vap->iv_opmode == IEEE80211_M_STA, ("wrong mode")); 482178354Ssam 483178354Ssam if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) 484178354Ssam return 0; 485178354Ssam return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 486178354Ssam} 487178354Ssam 488178354Ssam/* 489178354Ssam * Decide if a received management frame should be 490178354Ssam * printed when debugging is enabled. This filters some 491178354Ssam * of the less interesting frames that come frequently 492178354Ssam * (e.g. beacons). 493178354Ssam */ 494178354Ssamstatic __inline int 495178354Ssamdoprint(struct ieee80211vap *vap, int subtype) 496178354Ssam{ 497178354Ssam switch (subtype) { 498178354Ssam case IEEE80211_FC0_SUBTYPE_BEACON: 499178354Ssam return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN); 500178354Ssam case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 501178354Ssam return 0; 502178354Ssam } 503178354Ssam return 1; 504178354Ssam} 505178354Ssam 506178354Ssam/* 507178354Ssam * Process a received frame. The node associated with the sender 508178354Ssam * should be supplied. If nothing was found in the node table then 509178354Ssam * the caller is assumed to supply a reference to iv_bss instead. 510178354Ssam * The RSSI and a timestamp are also supplied. The RSSI data is used 511178354Ssam * during AP scanning to select a AP to associate with; it can have 512178354Ssam * any units so long as values have consistent units and higher values 513178354Ssam * mean ``better signal''. The receive timestamp is currently not used 514178354Ssam * by the 802.11 layer. 515178354Ssam */ 516178354Ssamstatic int 517192468Ssamsta_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf) 518178354Ssam{ 519178354Ssam#define HAS_SEQ(type) ((type & 0x4) == 0) 520178354Ssam struct ieee80211vap *vap = ni->ni_vap; 521178354Ssam struct ieee80211com *ic = ni->ni_ic; 522178354Ssam struct ifnet *ifp = vap->iv_ifp; 523178354Ssam struct ieee80211_frame *wh; 524178354Ssam struct ieee80211_key *key; 525178354Ssam struct ether_header *eh; 526203422Srpaulo int hdrspace, need_tap = 1; /* mbuf need to be tapped. */ 527178354Ssam uint8_t dir, type, subtype, qos; 528178354Ssam uint8_t *bssid; 529178354Ssam uint16_t rxseq; 530178354Ssam 531183247Ssam if (m->m_flags & M_AMPDU_MPDU) { 532178354Ssam /* 533178354Ssam * Fastpath for A-MPDU reorder q resubmission. Frames 534183247Ssam * w/ M_AMPDU_MPDU marked have already passed through 535183247Ssam * here but were received out of order and been held on 536183247Ssam * the reorder queue. When resubmitted they are marked 537183247Ssam * with the M_AMPDU_MPDU flag and we can bypass most of 538183247Ssam * the normal processing. 539178354Ssam */ 540178354Ssam wh = mtod(m, struct ieee80211_frame *); 541178354Ssam type = IEEE80211_FC0_TYPE_DATA; 542178354Ssam dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 543178354Ssam subtype = IEEE80211_FC0_SUBTYPE_QOS; 544178354Ssam hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */ 545178354Ssam goto resubmit_ampdu; 546178354Ssam } 547178354Ssam 548178354Ssam KASSERT(ni != NULL, ("null node")); 549178354Ssam ni->ni_inact = ni->ni_inact_reload; 550178354Ssam 551178354Ssam type = -1; /* undefined */ 552178354Ssam 553178354Ssam if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 554178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 555178354Ssam ni->ni_macaddr, NULL, 556178354Ssam "too short (1): len %u", m->m_pkthdr.len); 557178354Ssam vap->iv_stats.is_rx_tooshort++; 558178354Ssam goto out; 559178354Ssam } 560178354Ssam /* 561178354Ssam * Bit of a cheat here, we use a pointer for a 3-address 562178354Ssam * frame format but don't reference fields past outside 563178354Ssam * ieee80211_frame_min w/o first validating the data is 564178354Ssam * present. 565178354Ssam */ 566178354Ssam wh = mtod(m, struct ieee80211_frame *); 567178354Ssam 568178354Ssam if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 569178354Ssam IEEE80211_FC0_VERSION_0) { 570178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 571191547Ssam ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x", 572191547Ssam wh->i_fc[0], wh->i_fc[1]); 573178354Ssam vap->iv_stats.is_rx_badversion++; 574178354Ssam goto err; 575178354Ssam } 576178354Ssam 577178354Ssam dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 578178354Ssam type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 579178354Ssam subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 580178354Ssam if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 581178354Ssam bssid = wh->i_addr2; 582178354Ssam if (!IEEE80211_ADDR_EQ(bssid, ni->ni_bssid)) { 583178354Ssam /* not interested in */ 584178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 585178354Ssam bssid, NULL, "%s", "not to bss"); 586178354Ssam vap->iv_stats.is_rx_wrongbss++; 587178354Ssam goto out; 588178354Ssam } 589227338Sadrian 590227338Sadrian /* 591227338Sadrian * Some devices may be in a promiscuous mode 592227338Sadrian * where they receive frames for multiple station 593227338Sadrian * addresses. 594227338Sadrian * 595227338Sadrian * If we receive a data frame that isn't 596227338Sadrian * destined to our VAP MAC, drop it. 597227338Sadrian * 598227338Sadrian * XXX TODO: This is only enforced when not scanning; 599227338Sadrian * XXX it assumes a software-driven scan will put the NIC 600227338Sadrian * XXX into a "no data frames" mode before setting this 601227338Sadrian * XXX flag. Otherwise it may be possible that we'll still 602227338Sadrian * XXX process data frames whilst scanning. 603227338Sadrian */ 604227338Sadrian if ((! IEEE80211_IS_MULTICAST(wh->i_addr1)) 605227338Sadrian && (! IEEE80211_ADDR_EQ(wh->i_addr1, IF_LLADDR(ifp)))) { 606227338Sadrian IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 607227338Sadrian bssid, NULL, "not to cur sta: lladdr=%6D, addr1=%6D", 608227338Sadrian IF_LLADDR(ifp), ":", wh->i_addr1, ":"); 609227338Sadrian vap->iv_stats.is_rx_wrongbss++; 610227338Sadrian goto out; 611227338Sadrian } 612227338Sadrian 613178354Ssam IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 614192468Ssam ni->ni_noise = nf; 615209022Savatar if (HAS_SEQ(type) && !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 616178354Ssam uint8_t tid = ieee80211_gettid(wh); 617178354Ssam if (IEEE80211_QOS_HAS_SEQ(wh) && 618178354Ssam TID_TO_WME_AC(tid) >= WME_AC_VI) 619178354Ssam ic->ic_wme.wme_hipri_traffic++; 620178354Ssam rxseq = le16toh(*(uint16_t *)wh->i_seq); 621221418Sadrian if (! ieee80211_check_rxseq(ni, wh)) { 622178354Ssam /* duplicate, discard */ 623178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 624178354Ssam bssid, "duplicate", 625178354Ssam "seqno <%u,%u> fragno <%u,%u> tid %u", 626178354Ssam rxseq >> IEEE80211_SEQ_SEQ_SHIFT, 627178354Ssam ni->ni_rxseqs[tid] >> 628178354Ssam IEEE80211_SEQ_SEQ_SHIFT, 629178354Ssam rxseq & IEEE80211_SEQ_FRAG_MASK, 630178354Ssam ni->ni_rxseqs[tid] & 631178354Ssam IEEE80211_SEQ_FRAG_MASK, 632178354Ssam tid); 633178354Ssam vap->iv_stats.is_rx_dup++; 634178354Ssam IEEE80211_NODE_STAT(ni, rx_dup); 635178354Ssam goto out; 636178354Ssam } 637178354Ssam ni->ni_rxseqs[tid] = rxseq; 638178354Ssam } 639178354Ssam } 640178354Ssam 641178354Ssam switch (type) { 642178354Ssam case IEEE80211_FC0_TYPE_DATA: 643178354Ssam hdrspace = ieee80211_hdrspace(ic, wh); 644178354Ssam if (m->m_len < hdrspace && 645178354Ssam (m = m_pullup(m, hdrspace)) == NULL) { 646178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 647178354Ssam ni->ni_macaddr, NULL, 648178354Ssam "data too short: expecting %u", hdrspace); 649178354Ssam vap->iv_stats.is_rx_tooshort++; 650178354Ssam goto out; /* XXX */ 651178354Ssam } 652178354Ssam /* 653183247Ssam * Handle A-MPDU re-ordering. If the frame is to be 654183247Ssam * processed directly then ieee80211_ampdu_reorder 655178354Ssam * will return 0; otherwise it has consumed the mbuf 656178354Ssam * and we should do nothing more with it. 657178354Ssam */ 658183247Ssam if ((m->m_flags & M_AMPDU) && 659178354Ssam (dir == IEEE80211_FC1_DIR_FROMDS || 660178354Ssam dir == IEEE80211_FC1_DIR_DSTODS) && 661178354Ssam ieee80211_ampdu_reorder(ni, m) != 0) { 662178354Ssam m = NULL; 663178354Ssam goto out; 664178354Ssam } 665178354Ssam resubmit_ampdu: 666178354Ssam if (dir == IEEE80211_FC1_DIR_FROMDS) { 667178354Ssam if ((ifp->if_flags & IFF_SIMPLEX) && 668178354Ssam isfromds_mcastecho(vap, wh)) { 669178354Ssam /* 670178354Ssam * In IEEE802.11 network, multicast 671178354Ssam * packets sent from "me" are broadcast 672178354Ssam * from the AP; silently discard for 673178354Ssam * SIMPLEX interface. 674178354Ssam */ 675178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 676178354Ssam wh, "data", "%s", "multicast echo"); 677178354Ssam vap->iv_stats.is_rx_mcastecho++; 678178354Ssam goto out; 679178354Ssam } 680178354Ssam if ((vap->iv_flags & IEEE80211_F_DWDS) && 681178354Ssam IEEE80211_IS_MULTICAST(wh->i_addr1)) { 682178354Ssam /* 683178354Ssam * DWDS sta's must drop 3-address mcast frames 684178354Ssam * as they will be sent separately as a 4-addr 685178354Ssam * frame. Accepting the 3-addr frame will 686178354Ssam * confuse the bridge into thinking the sending 687178354Ssam * sta is located at the end of WDS link. 688178354Ssam */ 689178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 690178354Ssam "3-address data", "%s", "DWDS enabled"); 691178354Ssam vap->iv_stats.is_rx_mcastecho++; 692178354Ssam goto out; 693178354Ssam } 694178354Ssam } else if (dir == IEEE80211_FC1_DIR_DSTODS) { 695178354Ssam if ((vap->iv_flags & IEEE80211_F_DWDS) == 0) { 696178354Ssam IEEE80211_DISCARD(vap, 697178354Ssam IEEE80211_MSG_INPUT, wh, "4-address data", 698178354Ssam "%s", "DWDS not enabled"); 699178354Ssam vap->iv_stats.is_rx_wrongdir++; 700178354Ssam goto out; 701178354Ssam } 702178354Ssam if ((ifp->if_flags & IFF_SIMPLEX) && 703178354Ssam isdstods_mcastecho(vap, wh)) { 704178354Ssam /* 705178354Ssam * In IEEE802.11 network, multicast 706178354Ssam * packets sent from "me" are broadcast 707178354Ssam * from the AP; silently discard for 708178354Ssam * SIMPLEX interface. 709178354Ssam */ 710178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 711178354Ssam "4-address data", "%s", "multicast echo"); 712178354Ssam vap->iv_stats.is_rx_mcastecho++; 713178354Ssam goto out; 714178354Ssam } 715178354Ssam } else { 716178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 717178354Ssam "data", "incorrect dir 0x%x", dir); 718178354Ssam vap->iv_stats.is_rx_wrongdir++; 719178354Ssam goto out; 720178354Ssam } 721178354Ssam 722178354Ssam /* 723178354Ssam * Handle privacy requirements. Note that we 724178354Ssam * must not be preempted from here until after 725178354Ssam * we (potentially) call ieee80211_crypto_demic; 726178354Ssam * otherwise we may violate assumptions in the 727178354Ssam * crypto cipher modules used to do delayed update 728178354Ssam * of replay sequence numbers. 729178354Ssam */ 730178354Ssam if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 731178354Ssam if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 732178354Ssam /* 733178354Ssam * Discard encrypted frames when privacy is off. 734178354Ssam */ 735178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 736178354Ssam wh, "WEP", "%s", "PRIVACY off"); 737178354Ssam vap->iv_stats.is_rx_noprivacy++; 738178354Ssam IEEE80211_NODE_STAT(ni, rx_noprivacy); 739178354Ssam goto out; 740178354Ssam } 741178354Ssam key = ieee80211_crypto_decap(ni, m, hdrspace); 742178354Ssam if (key == NULL) { 743178354Ssam /* NB: stats+msgs handled in crypto_decap */ 744178354Ssam IEEE80211_NODE_STAT(ni, rx_wepfail); 745178354Ssam goto out; 746178354Ssam } 747178354Ssam wh = mtod(m, struct ieee80211_frame *); 748178354Ssam wh->i_fc[1] &= ~IEEE80211_FC1_WEP; 749178354Ssam } else { 750178354Ssam /* XXX M_WEP and IEEE80211_F_PRIVACY */ 751178354Ssam key = NULL; 752178354Ssam } 753178354Ssam 754178354Ssam /* 755178354Ssam * Save QoS bits for use below--before we strip the header. 756178354Ssam */ 757178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_QOS) { 758178354Ssam qos = (dir == IEEE80211_FC1_DIR_DSTODS) ? 759178354Ssam ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] : 760178354Ssam ((struct ieee80211_qosframe *)wh)->i_qos[0]; 761178354Ssam } else 762178354Ssam qos = 0; 763178354Ssam 764178354Ssam /* 765178354Ssam * Next up, any fragmentation. 766178354Ssam */ 767178354Ssam if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 768178354Ssam m = ieee80211_defrag(ni, m, hdrspace); 769178354Ssam if (m == NULL) { 770178354Ssam /* Fragment dropped or frame not complete yet */ 771178354Ssam goto out; 772178354Ssam } 773178354Ssam } 774178354Ssam wh = NULL; /* no longer valid, catch any uses */ 775178354Ssam 776178354Ssam /* 777178354Ssam * Next strip any MSDU crypto bits. 778178354Ssam */ 779178354Ssam if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) { 780178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 781178354Ssam ni->ni_macaddr, "data", "%s", "demic error"); 782178354Ssam vap->iv_stats.is_rx_demicfail++; 783178354Ssam IEEE80211_NODE_STAT(ni, rx_demicfail); 784178354Ssam goto out; 785178354Ssam } 786178354Ssam 787178354Ssam /* copy to listener after decrypt */ 788192468Ssam if (ieee80211_radiotap_active_vap(vap)) 789202967Srpaulo ieee80211_radiotap_rx(vap, m); 790178354Ssam need_tap = 0; 791178354Ssam 792178354Ssam /* 793178354Ssam * Finally, strip the 802.11 header. 794178354Ssam */ 795178354Ssam m = ieee80211_decap(vap, m, hdrspace); 796178354Ssam if (m == NULL) { 797178354Ssam /* XXX mask bit to check for both */ 798178354Ssam /* don't count Null data frames as errors */ 799178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 800178354Ssam subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 801178354Ssam goto out; 802178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 803178354Ssam ni->ni_macaddr, "data", "%s", "decap error"); 804178354Ssam vap->iv_stats.is_rx_decap++; 805178354Ssam IEEE80211_NODE_STAT(ni, rx_decap); 806178354Ssam goto err; 807178354Ssam } 808178354Ssam eh = mtod(m, struct ether_header *); 809178354Ssam if (!ieee80211_node_is_authorized(ni)) { 810178354Ssam /* 811178354Ssam * Deny any non-PAE frames received prior to 812178354Ssam * authorization. For open/shared-key 813178354Ssam * authentication the port is mark authorized 814178354Ssam * after authentication completes. For 802.1x 815178354Ssam * the port is not marked authorized by the 816178354Ssam * authenticator until the handshake has completed. 817178354Ssam */ 818178354Ssam if (eh->ether_type != htons(ETHERTYPE_PAE)) { 819178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 820178354Ssam eh->ether_shost, "data", 821178354Ssam "unauthorized port: ether type 0x%x len %u", 822178354Ssam eh->ether_type, m->m_pkthdr.len); 823178354Ssam vap->iv_stats.is_rx_unauth++; 824178354Ssam IEEE80211_NODE_STAT(ni, rx_unauth); 825178354Ssam goto err; 826178354Ssam } 827178354Ssam } else { 828178354Ssam /* 829178354Ssam * When denying unencrypted frames, discard 830178354Ssam * any non-PAE frames received without encryption. 831178354Ssam */ 832178354Ssam if ((vap->iv_flags & IEEE80211_F_DROPUNENC) && 833178354Ssam (key == NULL && (m->m_flags & M_WEP) == 0) && 834178354Ssam eh->ether_type != htons(ETHERTYPE_PAE)) { 835178354Ssam /* 836178354Ssam * Drop unencrypted frames. 837178354Ssam */ 838178354Ssam vap->iv_stats.is_rx_unencrypted++; 839178354Ssam IEEE80211_NODE_STAT(ni, rx_unencrypted); 840178354Ssam goto out; 841178354Ssam } 842178354Ssam } 843178354Ssam /* XXX require HT? */ 844178354Ssam if (qos & IEEE80211_QOS_AMSDU) { 845178354Ssam m = ieee80211_decap_amsdu(ni, m); 846178354Ssam if (m == NULL) 847178354Ssam return IEEE80211_FC0_TYPE_DATA; 848190391Ssam } else { 849190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 850190391Ssam m = ieee80211_decap_fastframe(vap, ni, m); 851190391Ssam if (m == NULL) 852178354Ssam return IEEE80211_FC0_TYPE_DATA; 853190391Ssam#endif 854178354Ssam } 855178354Ssam ieee80211_deliver_data(vap, ni, m); 856178354Ssam return IEEE80211_FC0_TYPE_DATA; 857178354Ssam 858178354Ssam case IEEE80211_FC0_TYPE_MGT: 859178354Ssam vap->iv_stats.is_rx_mgmt++; 860178354Ssam IEEE80211_NODE_STAT(ni, rx_mgmt); 861178354Ssam if (dir != IEEE80211_FC1_DIR_NODS) { 862178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 863178354Ssam wh, "data", "incorrect dir 0x%x", dir); 864178354Ssam vap->iv_stats.is_rx_wrongdir++; 865178354Ssam goto err; 866178354Ssam } 867178354Ssam if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 868178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 869178354Ssam ni->ni_macaddr, "mgt", "too short: len %u", 870178354Ssam m->m_pkthdr.len); 871178354Ssam vap->iv_stats.is_rx_tooshort++; 872178354Ssam goto out; 873178354Ssam } 874178354Ssam#ifdef IEEE80211_DEBUG 875178354Ssam if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) || 876178354Ssam ieee80211_msg_dumppkts(vap)) { 877178354Ssam if_printf(ifp, "received %s from %s rssi %d\n", 878178354Ssam ieee80211_mgt_subtype_name[subtype >> 879178354Ssam IEEE80211_FC0_SUBTYPE_SHIFT], 880178354Ssam ether_sprintf(wh->i_addr2), rssi); 881178354Ssam } 882178354Ssam#endif 883178354Ssam if (wh->i_fc[1] & IEEE80211_FC1_WEP) { 884178354Ssam if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) { 885178354Ssam /* 886178354Ssam * Only shared key auth frames with a challenge 887178354Ssam * should be encrypted, discard all others. 888178354Ssam */ 889178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 890178354Ssam wh, ieee80211_mgt_subtype_name[subtype >> 891178354Ssam IEEE80211_FC0_SUBTYPE_SHIFT], 892178354Ssam "%s", "WEP set but not permitted"); 893178354Ssam vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 894178354Ssam goto out; 895178354Ssam } 896178354Ssam if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 897178354Ssam /* 898178354Ssam * Discard encrypted frames when privacy is off. 899178354Ssam */ 900178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 901178354Ssam wh, "mgt", "%s", "WEP set but PRIVACY off"); 902178354Ssam vap->iv_stats.is_rx_noprivacy++; 903178354Ssam goto out; 904178354Ssam } 905178354Ssam hdrspace = ieee80211_hdrspace(ic, wh); 906178354Ssam key = ieee80211_crypto_decap(ni, m, hdrspace); 907178354Ssam if (key == NULL) { 908178354Ssam /* NB: stats+msgs handled in crypto_decap */ 909178354Ssam goto out; 910178354Ssam } 911178354Ssam wh = mtod(m, struct ieee80211_frame *); 912178354Ssam wh->i_fc[1] &= ~IEEE80211_FC1_WEP; 913178354Ssam } 914192468Ssam vap->iv_recv_mgmt(ni, m, subtype, rssi, nf); 915191534Ssam goto out; 916178354Ssam 917178354Ssam case IEEE80211_FC0_TYPE_CTL: 918178354Ssam vap->iv_stats.is_rx_ctl++; 919178354Ssam IEEE80211_NODE_STAT(ni, rx_ctrl); 920191546Ssam vap->iv_recv_ctl(ni, m, subtype); 921178354Ssam goto out; 922191549Ssam 923178354Ssam default: 924178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 925178354Ssam wh, NULL, "bad frame type 0x%x", type); 926178354Ssam /* should not come here */ 927178354Ssam break; 928178354Ssam } 929178354Ssamerr: 930178354Ssam ifp->if_ierrors++; 931178354Ssamout: 932178354Ssam if (m != NULL) { 933192765Ssam if (need_tap && ieee80211_radiotap_active_vap(vap)) 934192468Ssam ieee80211_radiotap_rx(vap, m); 935178354Ssam m_freem(m); 936178354Ssam } 937178354Ssam return type; 938178354Ssam} 939178354Ssam 940178354Ssamstatic void 941178354Ssamsta_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh, 942192468Ssam int rssi, int nf, uint16_t seq, uint16_t status) 943178354Ssam{ 944178354Ssam struct ieee80211vap *vap = ni->ni_vap; 945178354Ssam 946178354Ssam if (ni->ni_authmode == IEEE80211_AUTH_SHARED) { 947178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 948178354Ssam ni->ni_macaddr, "open auth", 949178354Ssam "bad sta auth mode %u", ni->ni_authmode); 950178354Ssam vap->iv_stats.is_rx_bad_auth++; /* XXX */ 951178354Ssam return; 952178354Ssam } 953178354Ssam if (vap->iv_state != IEEE80211_S_AUTH || 954178354Ssam seq != IEEE80211_AUTH_OPEN_RESPONSE) { 955178354Ssam vap->iv_stats.is_rx_bad_auth++; 956178354Ssam return; 957178354Ssam } 958178354Ssam if (status != 0) { 959178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, 960178354Ssam ni, "open auth failed (reason %d)", status); 961178354Ssam vap->iv_stats.is_rx_auth_fail++; 962178354Ssam vap->iv_stats.is_rx_authfail_code = status; 963178354Ssam ieee80211_new_state(vap, IEEE80211_S_SCAN, 964178354Ssam IEEE80211_SCAN_FAIL_STATUS); 965178354Ssam } else 966178354Ssam ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 967178354Ssam} 968178354Ssam 969178354Ssamstatic void 970178354Ssamsta_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh, 971192468Ssam uint8_t *frm, uint8_t *efrm, int rssi, int nf, 972178354Ssam uint16_t seq, uint16_t status) 973178354Ssam{ 974178354Ssam struct ieee80211vap *vap = ni->ni_vap; 975178354Ssam uint8_t *challenge; 976178354Ssam int estatus; 977178354Ssam 978178354Ssam /* 979178354Ssam * NB: this can happen as we allow pre-shared key 980178354Ssam * authentication to be enabled w/o wep being turned 981178354Ssam * on so that configuration of these can be done 982178354Ssam * in any order. It may be better to enforce the 983178354Ssam * ordering in which case this check would just be 984178354Ssam * for sanity/consistency. 985178354Ssam */ 986178354Ssam if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 987178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 988178354Ssam ni->ni_macaddr, "shared key auth", 989178354Ssam "%s", " PRIVACY is disabled"); 990178354Ssam estatus = IEEE80211_STATUS_ALG; 991178354Ssam goto bad; 992178354Ssam } 993178354Ssam /* 994178354Ssam * Pre-shared key authentication is evil; accept 995178354Ssam * it only if explicitly configured (it is supported 996178354Ssam * mainly for compatibility with clients like OS X). 997178354Ssam */ 998178354Ssam if (ni->ni_authmode != IEEE80211_AUTH_AUTO && 999178354Ssam ni->ni_authmode != IEEE80211_AUTH_SHARED) { 1000178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1001178354Ssam ni->ni_macaddr, "shared key auth", 1002178354Ssam "bad sta auth mode %u", ni->ni_authmode); 1003178354Ssam vap->iv_stats.is_rx_bad_auth++; /* XXX maybe a unique error? */ 1004178354Ssam estatus = IEEE80211_STATUS_ALG; 1005178354Ssam goto bad; 1006178354Ssam } 1007178354Ssam 1008178354Ssam challenge = NULL; 1009178354Ssam if (frm + 1 < efrm) { 1010178354Ssam if ((frm[1] + 2) > (efrm - frm)) { 1011178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1012178354Ssam ni->ni_macaddr, "shared key auth", 1013178354Ssam "ie %d/%d too long", 1014178354Ssam frm[0], (frm[1] + 2) - (efrm - frm)); 1015178354Ssam vap->iv_stats.is_rx_bad_auth++; 1016178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1017178354Ssam goto bad; 1018178354Ssam } 1019178354Ssam if (*frm == IEEE80211_ELEMID_CHALLENGE) 1020178354Ssam challenge = frm; 1021178354Ssam frm += frm[1] + 2; 1022178354Ssam } 1023178354Ssam switch (seq) { 1024178354Ssam case IEEE80211_AUTH_SHARED_CHALLENGE: 1025178354Ssam case IEEE80211_AUTH_SHARED_RESPONSE: 1026178354Ssam if (challenge == NULL) { 1027178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1028178354Ssam ni->ni_macaddr, "shared key auth", 1029178354Ssam "%s", "no challenge"); 1030178354Ssam vap->iv_stats.is_rx_bad_auth++; 1031178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1032178354Ssam goto bad; 1033178354Ssam } 1034178354Ssam if (challenge[1] != IEEE80211_CHALLENGE_LEN) { 1035178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1036178354Ssam ni->ni_macaddr, "shared key auth", 1037178354Ssam "bad challenge len %d", challenge[1]); 1038178354Ssam vap->iv_stats.is_rx_bad_auth++; 1039178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1040178354Ssam goto bad; 1041178354Ssam } 1042178354Ssam default: 1043178354Ssam break; 1044178354Ssam } 1045178354Ssam if (vap->iv_state != IEEE80211_S_AUTH) 1046178354Ssam return; 1047178354Ssam switch (seq) { 1048178354Ssam case IEEE80211_AUTH_SHARED_PASS: 1049178354Ssam if (ni->ni_challenge != NULL) { 1050186302Ssam free(ni->ni_challenge, M_80211_NODE); 1051178354Ssam ni->ni_challenge = NULL; 1052178354Ssam } 1053178354Ssam if (status != 0) { 1054178354Ssam IEEE80211_NOTE_FRAME(vap, 1055178354Ssam IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, wh, 1056178354Ssam "shared key auth failed (reason %d)", status); 1057178354Ssam vap->iv_stats.is_rx_auth_fail++; 1058178354Ssam vap->iv_stats.is_rx_authfail_code = status; 1059178354Ssam return; 1060178354Ssam } 1061178354Ssam ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 1062178354Ssam break; 1063178354Ssam case IEEE80211_AUTH_SHARED_CHALLENGE: 1064178354Ssam if (!ieee80211_alloc_challenge(ni)) 1065178354Ssam return; 1066178354Ssam /* XXX could optimize by passing recvd challenge */ 1067178354Ssam memcpy(ni->ni_challenge, &challenge[2], challenge[1]); 1068178354Ssam IEEE80211_SEND_MGMT(ni, 1069178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, seq + 1); 1070178354Ssam break; 1071178354Ssam default: 1072178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_AUTH, 1073178354Ssam wh, "shared key auth", "bad seq %d", seq); 1074178354Ssam vap->iv_stats.is_rx_bad_auth++; 1075178354Ssam return; 1076178354Ssam } 1077178354Ssam return; 1078178354Ssambad: 1079178354Ssam /* 1080178354Ssam * Kick the state machine. This short-circuits 1081178354Ssam * using the mgt frame timeout to trigger the 1082178354Ssam * state transition. 1083178354Ssam */ 1084178354Ssam if (vap->iv_state == IEEE80211_S_AUTH) 1085178354Ssam ieee80211_new_state(vap, IEEE80211_S_SCAN, 1086178354Ssam IEEE80211_SCAN_FAIL_STATUS); 1087178354Ssam} 1088178354Ssam 1089178354Ssamstatic int 1090178354Ssamieee80211_parse_wmeparams(struct ieee80211vap *vap, uint8_t *frm, 1091178354Ssam const struct ieee80211_frame *wh) 1092178354Ssam{ 1093178354Ssam#define MS(_v, _f) (((_v) & _f) >> _f##_S) 1094178354Ssam struct ieee80211_wme_state *wme = &vap->iv_ic->ic_wme; 1095178354Ssam u_int len = frm[1], qosinfo; 1096178354Ssam int i; 1097178354Ssam 1098178354Ssam if (len < sizeof(struct ieee80211_wme_param)-2) { 1099178354Ssam IEEE80211_DISCARD_IE(vap, 1100178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WME, 1101178354Ssam wh, "WME", "too short, len %u", len); 1102178354Ssam return -1; 1103178354Ssam } 1104178354Ssam qosinfo = frm[__offsetof(struct ieee80211_wme_param, param_qosInfo)]; 1105178354Ssam qosinfo &= WME_QOSINFO_COUNT; 1106178354Ssam /* XXX do proper check for wraparound */ 1107178354Ssam if (qosinfo == wme->wme_wmeChanParams.cap_info) 1108178354Ssam return 0; 1109178354Ssam frm += __offsetof(struct ieee80211_wme_param, params_acParams); 1110178354Ssam for (i = 0; i < WME_NUM_AC; i++) { 1111178354Ssam struct wmeParams *wmep = 1112178354Ssam &wme->wme_wmeChanParams.cap_wmeParams[i]; 1113178354Ssam /* NB: ACI not used */ 1114178354Ssam wmep->wmep_acm = MS(frm[0], WME_PARAM_ACM); 1115178354Ssam wmep->wmep_aifsn = MS(frm[0], WME_PARAM_AIFSN); 1116178354Ssam wmep->wmep_logcwmin = MS(frm[1], WME_PARAM_LOGCWMIN); 1117178354Ssam wmep->wmep_logcwmax = MS(frm[1], WME_PARAM_LOGCWMAX); 1118178354Ssam wmep->wmep_txopLimit = LE_READ_2(frm+2); 1119178354Ssam frm += 4; 1120178354Ssam } 1121178354Ssam wme->wme_wmeChanParams.cap_info = qosinfo; 1122178354Ssam return 1; 1123178354Ssam#undef MS 1124178354Ssam} 1125178354Ssam 1126178354Ssam/* 1127193439Ssam * Process 11h Channel Switch Announcement (CSA) ie. If this 1128193439Ssam * is the first CSA then initiate the switch. Otherwise we 1129193439Ssam * track state and trigger completion and/or cancel of the switch. 1130193439Ssam * XXX should be public for IBSS use 1131193439Ssam */ 1132193439Ssamstatic void 1133193439Ssamieee80211_parse_csaparams(struct ieee80211vap *vap, uint8_t *frm, 1134193439Ssam const struct ieee80211_frame *wh) 1135193439Ssam{ 1136193439Ssam struct ieee80211com *ic = vap->iv_ic; 1137193439Ssam const struct ieee80211_csa_ie *csa = 1138193439Ssam (const struct ieee80211_csa_ie *) frm; 1139193439Ssam 1140193439Ssam KASSERT(vap->iv_state >= IEEE80211_S_RUN, 1141193439Ssam ("state %s", ieee80211_state_name[vap->iv_state])); 1142193439Ssam 1143193439Ssam if (csa->csa_mode > 1) { 1144193439Ssam IEEE80211_DISCARD_IE(vap, 1145193439Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1146193439Ssam wh, "CSA", "invalid mode %u", csa->csa_mode); 1147193439Ssam return; 1148193439Ssam } 1149193439Ssam IEEE80211_LOCK(ic); 1150193439Ssam if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 1151193439Ssam /* 1152193439Ssam * Convert the channel number to a channel reference. We 1153193439Ssam * try first to preserve turbo attribute of the current 1154193439Ssam * channel then fallback. Note this will not work if the 1155193439Ssam * CSA specifies a channel that requires a band switch (e.g. 1156193439Ssam * 11a => 11g). This is intentional as 11h is defined only 1157193439Ssam * for 5GHz/11a and because the switch does not involve a 1158193439Ssam * reassociation, protocol state (capabilities, negotated 1159193439Ssam * rates, etc) may/will be wrong. 1160193439Ssam */ 1161193439Ssam struct ieee80211_channel *c = 1162193439Ssam ieee80211_find_channel_byieee(ic, csa->csa_newchan, 1163193439Ssam (ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALLTURBO)); 1164193439Ssam if (c == NULL) { 1165193439Ssam c = ieee80211_find_channel_byieee(ic, 1166193439Ssam csa->csa_newchan, 1167193439Ssam (ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALL)); 1168193439Ssam if (c == NULL) { 1169193439Ssam IEEE80211_DISCARD_IE(vap, 1170193439Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1171193439Ssam wh, "CSA", "invalid channel %u", 1172193439Ssam csa->csa_newchan); 1173193439Ssam goto done; 1174193439Ssam } 1175193439Ssam } 1176193439Ssam#if IEEE80211_CSA_COUNT_MIN > 0 1177193439Ssam if (csa->csa_count < IEEE80211_CSA_COUNT_MIN) { 1178193439Ssam /* 1179193439Ssam * Require at least IEEE80211_CSA_COUNT_MIN count to 1180193439Ssam * reduce the risk of being redirected by a fabricated 1181193439Ssam * CSA. If a valid CSA is dropped we'll still get a 1182193439Ssam * beacon miss when the AP leaves the channel so we'll 1183193439Ssam * eventually follow to the new channel. 1184193439Ssam * 1185193439Ssam * NOTE: this violates the 11h spec that states that 1186193439Ssam * count may be any value and if 0 then a switch 1187193439Ssam * should happen asap. 1188193439Ssam */ 1189193439Ssam IEEE80211_DISCARD_IE(vap, 1190193439Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1191193439Ssam wh, "CSA", "count %u too small, must be >= %u", 1192193439Ssam csa->csa_count, IEEE80211_CSA_COUNT_MIN); 1193193439Ssam goto done; 1194193439Ssam } 1195193439Ssam#endif 1196193439Ssam ieee80211_csa_startswitch(ic, c, csa->csa_mode, csa->csa_count); 1197193439Ssam } else { 1198193439Ssam /* 1199193439Ssam * Validate this ie against the initial CSA. We require 1200193439Ssam * mode and channel not change and the count must be 1201193439Ssam * monotonically decreasing. This may be pointless and 1202193439Ssam * canceling the switch as a result may be too paranoid but 1203193439Ssam * in the worst case if we drop out of CSA because of this 1204193439Ssam * and the AP does move then we'll just end up taking a 1205193439Ssam * beacon miss and scan to find the AP. 1206193439Ssam * 1207193439Ssam * XXX may want <= on count as we also process ProbeResp 1208193439Ssam * frames and those may come in w/ the same count as the 1209193439Ssam * previous beacon; but doing so leaves us open to a stuck 1210193439Ssam * count until we add a dead-man timer 1211193439Ssam */ 1212193439Ssam if (!(csa->csa_count < ic->ic_csa_count && 1213193439Ssam csa->csa_mode == ic->ic_csa_mode && 1214193439Ssam csa->csa_newchan == ieee80211_chan2ieee(ic, ic->ic_csa_newchan))) { 1215193439Ssam IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_DOTH, wh, 1216193439Ssam "CSA ie mismatch, initial ie <%d,%d,%d>, " 1217193439Ssam "this ie <%d,%d,%d>", ic->ic_csa_mode, 1218193439Ssam ic->ic_csa_newchan, ic->ic_csa_count, 1219193439Ssam csa->csa_mode, csa->csa_newchan, csa->csa_count); 1220193439Ssam ieee80211_csa_cancelswitch(ic); 1221193439Ssam } else { 1222193439Ssam if (csa->csa_count <= 1) 1223193439Ssam ieee80211_csa_completeswitch(ic); 1224193439Ssam else 1225193439Ssam ic->ic_csa_count = csa->csa_count; 1226193439Ssam } 1227193439Ssam } 1228193439Ssamdone: 1229193439Ssam IEEE80211_UNLOCK(ic); 1230193439Ssam} 1231193439Ssam 1232193439Ssam/* 1233178354Ssam * Return non-zero if a background scan may be continued: 1234178354Ssam * o bg scan is active 1235178354Ssam * o no channel switch is pending 1236178354Ssam * o there has not been any traffic recently 1237178354Ssam * 1238178354Ssam * Note we do not check if there is an administrative enable; 1239178354Ssam * this is only done to start the scan. We assume that any 1240178354Ssam * change in state will be accompanied by a request to cancel 1241178354Ssam * active scans which will otherwise cause this test to fail. 1242178354Ssam */ 1243178354Ssamstatic __inline int 1244178354Ssamcontbgscan(struct ieee80211vap *vap) 1245178354Ssam{ 1246178354Ssam struct ieee80211com *ic = vap->iv_ic; 1247178354Ssam 1248178354Ssam return ((ic->ic_flags_ext & IEEE80211_FEXT_BGSCAN) && 1249178354Ssam (ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 && 1250178354Ssam vap->iv_state == IEEE80211_S_RUN && /* XXX? */ 1251178354Ssam time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle)); 1252178354Ssam} 1253178354Ssam 1254178354Ssam/* 1255178354Ssam * Return non-zero if a backgrond scan may be started: 1256178354Ssam * o bg scanning is administratively enabled 1257178354Ssam * o no channel switch is pending 1258178354Ssam * o we are not boosted on a dynamic turbo channel 1259178354Ssam * o there has not been a scan recently 1260178354Ssam * o there has not been any traffic recently 1261178354Ssam */ 1262178354Ssamstatic __inline int 1263178354Ssamstartbgscan(struct ieee80211vap *vap) 1264178354Ssam{ 1265178354Ssam struct ieee80211com *ic = vap->iv_ic; 1266178354Ssam 1267178354Ssam return ((vap->iv_flags & IEEE80211_F_BGSCAN) && 1268178354Ssam (ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 && 1269190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 1270178354Ssam !IEEE80211_IS_CHAN_DTURBO(ic->ic_curchan) && 1271190391Ssam#endif 1272178354Ssam time_after(ticks, ic->ic_lastscan + vap->iv_bgscanintvl) && 1273178354Ssam time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle)); 1274178354Ssam} 1275178354Ssam 1276178354Ssamstatic void 1277178354Ssamsta_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, 1278192468Ssam int subtype, int rssi, int nf) 1279178354Ssam{ 1280178354Ssam#define ISPROBE(_st) ((_st) == IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1281178354Ssam#define ISREASSOC(_st) ((_st) == IEEE80211_FC0_SUBTYPE_REASSOC_RESP) 1282178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1283178354Ssam struct ieee80211com *ic = ni->ni_ic; 1284178354Ssam struct ieee80211_frame *wh; 1285178354Ssam uint8_t *frm, *efrm; 1286178354Ssam uint8_t *rates, *xrates, *wme, *htcap, *htinfo; 1287178354Ssam uint8_t rate; 1288178354Ssam 1289178354Ssam wh = mtod(m0, struct ieee80211_frame *); 1290178354Ssam frm = (uint8_t *)&wh[1]; 1291178354Ssam efrm = mtod(m0, uint8_t *) + m0->m_len; 1292178354Ssam switch (subtype) { 1293178354Ssam case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1294178354Ssam case IEEE80211_FC0_SUBTYPE_BEACON: { 1295178354Ssam struct ieee80211_scanparams scan; 1296178354Ssam /* 1297178354Ssam * We process beacon/probe response frames: 1298178354Ssam * o when scanning, or 1299178354Ssam * o station mode when associated (to collect state 1300191444Srpaulo * updates such as 802.11g slot time) 1301178354Ssam * Frames otherwise received are discarded. 1302178354Ssam */ 1303178354Ssam if (!((ic->ic_flags & IEEE80211_F_SCAN) || ni->ni_associd)) { 1304178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1305178354Ssam return; 1306178354Ssam } 1307178354Ssam /* XXX probe response in sta mode when !scanning? */ 1308232244Sadrian if (ieee80211_parse_beacon(ni, m0, &scan) != 0) { 1309232270Sadrian if (! (ic->ic_flags & IEEE80211_F_SCAN)) 1310232270Sadrian vap->iv_stats.is_beacon_bad++; 1311178354Ssam return; 1312232244Sadrian } 1313178354Ssam /* 1314178354Ssam * Count frame now that we know it's to be processed. 1315178354Ssam */ 1316178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1317178354Ssam vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1318178354Ssam IEEE80211_NODE_STAT(ni, rx_beacons); 1319178354Ssam } else 1320178354Ssam IEEE80211_NODE_STAT(ni, rx_proberesp); 1321178354Ssam /* 1322178354Ssam * When operating in station mode, check for state updates. 1323178354Ssam * Be careful to ignore beacons received while doing a 1324178354Ssam * background scan. We consider only 11g/WMM stuff right now. 1325178354Ssam */ 1326178354Ssam if (ni->ni_associd != 0 && 1327178354Ssam ((ic->ic_flags & IEEE80211_F_SCAN) == 0 || 1328178354Ssam IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_bssid))) { 1329178354Ssam /* record tsf of last beacon */ 1330178354Ssam memcpy(ni->ni_tstamp.data, scan.tstamp, 1331178354Ssam sizeof(ni->ni_tstamp)); 1332178354Ssam /* count beacon frame for s/w bmiss handling */ 1333178354Ssam vap->iv_swbmiss_count++; 1334178354Ssam vap->iv_bmiss_count = 0; 1335178354Ssam if (ni->ni_erp != scan.erp) { 1336178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1337178354Ssam wh->i_addr2, 1338178354Ssam "erp change: was 0x%x, now 0x%x", 1339178354Ssam ni->ni_erp, scan.erp); 1340178354Ssam if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 1341178354Ssam (ni->ni_erp & IEEE80211_ERP_USE_PROTECTION)) 1342178354Ssam ic->ic_flags |= IEEE80211_F_USEPROT; 1343178354Ssam else 1344178354Ssam ic->ic_flags &= ~IEEE80211_F_USEPROT; 1345178354Ssam ni->ni_erp = scan.erp; 1346178354Ssam /* XXX statistic */ 1347178354Ssam /* XXX driver notification */ 1348178354Ssam } 1349178354Ssam if ((ni->ni_capinfo ^ scan.capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME) { 1350178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1351178354Ssam wh->i_addr2, 1352178354Ssam "capabilities change: was 0x%x, now 0x%x", 1353178354Ssam ni->ni_capinfo, scan.capinfo); 1354178354Ssam /* 1355178354Ssam * NB: we assume short preamble doesn't 1356178354Ssam * change dynamically 1357178354Ssam */ 1358178354Ssam ieee80211_set_shortslottime(ic, 1359178354Ssam IEEE80211_IS_CHAN_A(ic->ic_bsschan) || 1360178354Ssam (scan.capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)); 1361178354Ssam ni->ni_capinfo = (ni->ni_capinfo &~ IEEE80211_CAPINFO_SHORT_SLOTTIME) 1362178354Ssam | (scan.capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME); 1363178354Ssam /* XXX statistic */ 1364178354Ssam } 1365178354Ssam if (scan.wme != NULL && 1366178354Ssam (ni->ni_flags & IEEE80211_NODE_QOS) && 1367178354Ssam ieee80211_parse_wmeparams(vap, scan.wme, wh) > 0) 1368178354Ssam ieee80211_wme_updateparams(vap); 1369190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 1370178354Ssam if (scan.ath != NULL) 1371178354Ssam ieee80211_parse_athparams(ni, scan.ath, wh); 1372190391Ssam#endif 1373183254Ssam if (scan.htcap != NULL && scan.htinfo != NULL && 1374193655Ssam (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1375183254Ssam ieee80211_ht_updateparams(ni, 1376183254Ssam scan.htcap, scan.htinfo); 1377178354Ssam /* XXX state changes? */ 1378178354Ssam } 1379227331Sadrian if (scan.quiet) 1380227331Sadrian ic->ic_set_quiet(ni, scan.quiet); 1381178354Ssam if (scan.tim != NULL) { 1382178354Ssam struct ieee80211_tim_ie *tim = 1383178354Ssam (struct ieee80211_tim_ie *) scan.tim; 1384178354Ssam#if 0 1385178354Ssam int aid = IEEE80211_AID(ni->ni_associd); 1386178354Ssam int ix = aid / NBBY; 1387178354Ssam int min = tim->tim_bitctl &~ 1; 1388178354Ssam int max = tim->tim_len + min - 4; 1389178354Ssam if ((tim->tim_bitctl&1) || 1390178354Ssam (min <= ix && ix <= max && 1391178354Ssam isset(tim->tim_bitmap - min, aid))) { 1392178354Ssam /* 1393178354Ssam * XXX Do not let bg scan kick off 1394178354Ssam * we are expecting data. 1395178354Ssam */ 1396178354Ssam ic->ic_lastdata = ticks; 1397178354Ssam ieee80211_sta_pwrsave(vap, 0); 1398178354Ssam } 1399178354Ssam#endif 1400178354Ssam ni->ni_dtim_count = tim->tim_count; 1401178354Ssam ni->ni_dtim_period = tim->tim_period; 1402178354Ssam } 1403193439Ssam if (scan.csa != NULL && 1404193439Ssam (vap->iv_flags & IEEE80211_F_DOTH)) 1405193439Ssam ieee80211_parse_csaparams(vap, scan.csa, wh); 1406193439Ssam else if (ic->ic_flags & IEEE80211_F_CSAPENDING) { 1407193439Ssam /* 1408193439Ssam * No CSA ie or 11h disabled, but a channel 1409193439Ssam * switch is pending; drop out so we aren't 1410193439Ssam * stuck in CSA state. If the AP really is 1411193439Ssam * moving we'll get a beacon miss and scan. 1412193439Ssam */ 1413193439Ssam IEEE80211_LOCK(ic); 1414193439Ssam ieee80211_csa_cancelswitch(ic); 1415193439Ssam IEEE80211_UNLOCK(ic); 1416193439Ssam } 1417178354Ssam /* 1418178354Ssam * If scanning, pass the info to the scan module. 1419178354Ssam * Otherwise, check if it's the right time to do 1420178354Ssam * a background scan. Background scanning must 1421178354Ssam * be enabled and we must not be operating in the 1422178354Ssam * turbo phase of dynamic turbo mode. Then, 1423178354Ssam * it's been a while since the last background 1424178354Ssam * scan and if no data frames have come through 1425178354Ssam * recently, kick off a scan. Note that this 1426178354Ssam * is the mechanism by which a background scan 1427178354Ssam * is started _and_ continued each time we 1428178354Ssam * return on-channel to receive a beacon from 1429178354Ssam * our ap. 1430178354Ssam */ 1431178354Ssam if (ic->ic_flags & IEEE80211_F_SCAN) { 1432178354Ssam ieee80211_add_scan(vap, &scan, wh, 1433192468Ssam subtype, rssi, nf); 1434178354Ssam } else if (contbgscan(vap)) { 1435178354Ssam ieee80211_bg_scan(vap, 0); 1436178354Ssam } else if (startbgscan(vap)) { 1437178354Ssam vap->iv_stats.is_scan_bg++; 1438178354Ssam#if 0 1439178354Ssam /* wakeup if we are sleeing */ 1440178354Ssam ieee80211_set_pwrsave(vap, 0); 1441178354Ssam#endif 1442178354Ssam ieee80211_bg_scan(vap, 0); 1443178354Ssam } 1444178354Ssam return; 1445178354Ssam } 1446178354Ssam /* 1447178354Ssam * If scanning, just pass information to the scan module. 1448178354Ssam */ 1449178354Ssam if (ic->ic_flags & IEEE80211_F_SCAN) { 1450178354Ssam if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1451178354Ssam /* 1452178354Ssam * Actively scanning a channel marked passive; 1453178354Ssam * send a probe request now that we know there 1454178354Ssam * is 802.11 traffic present. 1455178354Ssam * 1456178354Ssam * XXX check if the beacon we recv'd gives 1457178354Ssam * us what we need and suppress the probe req 1458178354Ssam */ 1459178354Ssam ieee80211_probe_curchan(vap, 1); 1460178354Ssam ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1461178354Ssam } 1462192468Ssam ieee80211_add_scan(vap, &scan, wh, subtype, rssi, nf); 1463178354Ssam return; 1464178354Ssam } 1465178354Ssam break; 1466178354Ssam } 1467178354Ssam 1468178354Ssam case IEEE80211_FC0_SUBTYPE_AUTH: { 1469178354Ssam uint16_t algo, seq, status; 1470178354Ssam /* 1471178354Ssam * auth frame format 1472178354Ssam * [2] algorithm 1473178354Ssam * [2] sequence 1474178354Ssam * [2] status 1475178354Ssam * [tlv*] challenge 1476178354Ssam */ 1477178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return); 1478178354Ssam algo = le16toh(*(uint16_t *)frm); 1479178354Ssam seq = le16toh(*(uint16_t *)(frm + 2)); 1480178354Ssam status = le16toh(*(uint16_t *)(frm + 4)); 1481178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr2, 1482178354Ssam "recv auth frame with algorithm %d seq %d", algo, seq); 1483178354Ssam 1484178354Ssam if (vap->iv_flags & IEEE80211_F_COUNTERM) { 1485178354Ssam IEEE80211_DISCARD(vap, 1486178354Ssam IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO, 1487178354Ssam wh, "auth", "%s", "TKIP countermeasures enabled"); 1488178354Ssam vap->iv_stats.is_rx_auth_countermeasures++; 1489178354Ssam if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 1490178354Ssam ieee80211_send_error(ni, wh->i_addr2, 1491178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 1492178354Ssam IEEE80211_REASON_MIC_FAILURE); 1493178354Ssam } 1494178354Ssam return; 1495178354Ssam } 1496178354Ssam if (algo == IEEE80211_AUTH_ALG_SHARED) 1497192468Ssam sta_auth_shared(ni, wh, frm + 6, efrm, rssi, nf, 1498192468Ssam seq, status); 1499178354Ssam else if (algo == IEEE80211_AUTH_ALG_OPEN) 1500192468Ssam sta_auth_open(ni, wh, rssi, nf, seq, status); 1501178354Ssam else { 1502178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1503178354Ssam wh, "auth", "unsupported alg %d", algo); 1504178354Ssam vap->iv_stats.is_rx_auth_unsupported++; 1505178354Ssam return; 1506178354Ssam } 1507178354Ssam break; 1508178354Ssam } 1509178354Ssam 1510178354Ssam case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 1511178354Ssam case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: { 1512178354Ssam uint16_t capinfo, associd; 1513178354Ssam uint16_t status; 1514178354Ssam 1515178354Ssam if (vap->iv_state != IEEE80211_S_ASSOC) { 1516178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1517178354Ssam return; 1518178354Ssam } 1519178354Ssam 1520178354Ssam /* 1521178354Ssam * asresp frame format 1522178354Ssam * [2] capability information 1523178354Ssam * [2] status 1524178354Ssam * [2] association ID 1525178354Ssam * [tlv] supported rates 1526178354Ssam * [tlv] extended supported rates 1527178354Ssam * [tlv] WME 1528178354Ssam * [tlv] HT capabilities 1529178354Ssam * [tlv] HT info 1530178354Ssam */ 1531178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return); 1532178354Ssam ni = vap->iv_bss; 1533178354Ssam capinfo = le16toh(*(uint16_t *)frm); 1534178354Ssam frm += 2; 1535178354Ssam status = le16toh(*(uint16_t *)frm); 1536178354Ssam frm += 2; 1537178354Ssam if (status != 0) { 1538178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1539178354Ssam wh->i_addr2, "%sassoc failed (reason %d)", 1540178354Ssam ISREASSOC(subtype) ? "re" : "", status); 1541178354Ssam vap->iv_stats.is_rx_auth_fail++; /* XXX */ 1542178354Ssam return; 1543178354Ssam } 1544178354Ssam associd = le16toh(*(uint16_t *)frm); 1545178354Ssam frm += 2; 1546178354Ssam 1547178354Ssam rates = xrates = wme = htcap = htinfo = NULL; 1548178354Ssam while (efrm - frm > 1) { 1549178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 1550178354Ssam switch (*frm) { 1551178354Ssam case IEEE80211_ELEMID_RATES: 1552178354Ssam rates = frm; 1553178354Ssam break; 1554178354Ssam case IEEE80211_ELEMID_XRATES: 1555178354Ssam xrates = frm; 1556178354Ssam break; 1557178354Ssam case IEEE80211_ELEMID_HTCAP: 1558178354Ssam htcap = frm; 1559178354Ssam break; 1560178354Ssam case IEEE80211_ELEMID_HTINFO: 1561178354Ssam htinfo = frm; 1562178354Ssam break; 1563178354Ssam case IEEE80211_ELEMID_VENDOR: 1564178354Ssam if (iswmeoui(frm)) 1565178354Ssam wme = frm; 1566193655Ssam else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) { 1567178354Ssam /* 1568178354Ssam * Accept pre-draft HT ie's if the 1569178354Ssam * standard ones have not been seen. 1570178354Ssam */ 1571178354Ssam if (ishtcapoui(frm)) { 1572178354Ssam if (htcap == NULL) 1573178354Ssam htcap = frm; 1574178354Ssam } else if (ishtinfooui(frm)) { 1575178354Ssam if (htinfo == NULL) 1576219603Sbschmidt htinfo = frm; 1577178354Ssam } 1578178354Ssam } 1579178354Ssam /* XXX Atheros OUI support */ 1580178354Ssam break; 1581178354Ssam } 1582178354Ssam frm += frm[1] + 2; 1583178354Ssam } 1584178354Ssam 1585178354Ssam IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 1586178354Ssam if (xrates != NULL) 1587178354Ssam IEEE80211_VERIFY_ELEMENT(xrates, 1588178354Ssam IEEE80211_RATE_MAXSIZE - rates[1], return); 1589178354Ssam rate = ieee80211_setup_rates(ni, rates, xrates, 1590178354Ssam IEEE80211_F_JOIN | 1591178354Ssam IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1592178354Ssam IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1593178354Ssam if (rate & IEEE80211_RATE_BASIC) { 1594178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1595178354Ssam wh->i_addr2, 1596178354Ssam "%sassoc failed (rate set mismatch)", 1597178354Ssam ISREASSOC(subtype) ? "re" : ""); 1598178354Ssam vap->iv_stats.is_rx_assoc_norate++; 1599178354Ssam ieee80211_new_state(vap, IEEE80211_S_SCAN, 1600178354Ssam IEEE80211_SCAN_FAIL_STATUS); 1601178354Ssam return; 1602178354Ssam } 1603178354Ssam 1604178354Ssam ni->ni_capinfo = capinfo; 1605178354Ssam ni->ni_associd = associd; 1606178354Ssam if (ni->ni_jointime == 0) 1607178354Ssam ni->ni_jointime = time_uptime; 1608178354Ssam if (wme != NULL && 1609178354Ssam ieee80211_parse_wmeparams(vap, wme, wh) >= 0) { 1610178354Ssam ni->ni_flags |= IEEE80211_NODE_QOS; 1611178354Ssam ieee80211_wme_updateparams(vap); 1612178354Ssam } else 1613178354Ssam ni->ni_flags &= ~IEEE80211_NODE_QOS; 1614178354Ssam /* 1615178354Ssam * Setup HT state according to the negotiation. 1616178354Ssam * 1617178354Ssam * NB: shouldn't need to check if HT use is enabled but some 1618178354Ssam * ap's send back HT ie's even when we don't indicate we 1619178354Ssam * are HT capable in our AssocReq. 1620178354Ssam */ 1621178354Ssam if (htcap != NULL && htinfo != NULL && 1622193655Ssam (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1623183254Ssam ieee80211_ht_node_init(ni); 1624183254Ssam ieee80211_ht_updateparams(ni, htcap, htinfo); 1625178354Ssam ieee80211_setup_htrates(ni, htcap, 1626178354Ssam IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1627178354Ssam ieee80211_setup_basic_htrates(ni, htinfo); 1628193966Ssam ieee80211_node_setuptxparms(ni); 1629214894Sbschmidt ieee80211_ratectl_node_init(ni); 1630190579Ssam } else { 1631190579Ssam#ifdef IEEE80211_SUPPORT_SUPERG 1632190579Ssam if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_ATH)) 1633190579Ssam ieee80211_ff_node_init(ni); 1634190579Ssam#endif 1635178354Ssam } 1636178354Ssam /* 1637178354Ssam * Configure state now that we are associated. 1638178354Ssam * 1639178354Ssam * XXX may need different/additional driver callbacks? 1640178354Ssam */ 1641178354Ssam if (IEEE80211_IS_CHAN_A(ic->ic_curchan) || 1642178354Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) { 1643178354Ssam ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 1644178354Ssam ic->ic_flags &= ~IEEE80211_F_USEBARKER; 1645178354Ssam } else { 1646178354Ssam ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 1647178354Ssam ic->ic_flags |= IEEE80211_F_USEBARKER; 1648178354Ssam } 1649178354Ssam ieee80211_set_shortslottime(ic, 1650178354Ssam IEEE80211_IS_CHAN_A(ic->ic_curchan) || 1651178354Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)); 1652178354Ssam /* 1653178354Ssam * Honor ERP protection. 1654178354Ssam * 1655178354Ssam * NB: ni_erp should zero for non-11g operation. 1656178354Ssam */ 1657178354Ssam if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 1658178354Ssam (ni->ni_erp & IEEE80211_ERP_USE_PROTECTION)) 1659178354Ssam ic->ic_flags |= IEEE80211_F_USEPROT; 1660178354Ssam else 1661178354Ssam ic->ic_flags &= ~IEEE80211_F_USEPROT; 1662178354Ssam IEEE80211_NOTE_MAC(vap, 1663178354Ssam IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, wh->i_addr2, 1664183256Ssam "%sassoc success at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", 1665178354Ssam ISREASSOC(subtype) ? "re" : "", 1666178354Ssam IEEE80211_NODE_AID(ni), 1667178354Ssam ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 1668178354Ssam ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 1669178354Ssam ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "", 1670178354Ssam ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 1671178354Ssam ni->ni_flags & IEEE80211_NODE_HT ? 1672182834Ssam (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 1673178354Ssam ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 1674183255Ssam ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 1675183255Ssam ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 1676183256Ssam ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 1677178354Ssam IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 1678178354Ssam ", fast-frames" : "", 1679178354Ssam IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 1680178354Ssam ", turbo" : "" 1681178354Ssam ); 1682178354Ssam ieee80211_new_state(vap, IEEE80211_S_RUN, subtype); 1683178354Ssam break; 1684178354Ssam } 1685178354Ssam 1686178354Ssam case IEEE80211_FC0_SUBTYPE_DEAUTH: { 1687178354Ssam uint16_t reason; 1688178354Ssam 1689178354Ssam if (vap->iv_state == IEEE80211_S_SCAN) { 1690178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1691178354Ssam return; 1692178354Ssam } 1693178354Ssam if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { 1694178354Ssam /* NB: can happen when in promiscuous mode */ 1695178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1696178354Ssam break; 1697178354Ssam } 1698178354Ssam 1699178354Ssam /* 1700178354Ssam * deauth frame format 1701178354Ssam * [2] reason 1702178354Ssam */ 1703178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); 1704178354Ssam reason = le16toh(*(uint16_t *)frm); 1705178354Ssam 1706178354Ssam vap->iv_stats.is_rx_deauth++; 1707178354Ssam vap->iv_stats.is_rx_deauth_code = reason; 1708178354Ssam IEEE80211_NODE_STAT(ni, rx_deauth); 1709178354Ssam 1710178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 1711178354Ssam "recv deauthenticate (reason %d)", reason); 1712178354Ssam ieee80211_new_state(vap, IEEE80211_S_AUTH, 1713178354Ssam (reason << 8) | IEEE80211_FC0_SUBTYPE_DEAUTH); 1714178354Ssam break; 1715178354Ssam } 1716178354Ssam 1717178354Ssam case IEEE80211_FC0_SUBTYPE_DISASSOC: { 1718178354Ssam uint16_t reason; 1719178354Ssam 1720178354Ssam if (vap->iv_state != IEEE80211_S_RUN && 1721178354Ssam vap->iv_state != IEEE80211_S_ASSOC && 1722178354Ssam vap->iv_state != IEEE80211_S_AUTH) { 1723178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1724178354Ssam return; 1725178354Ssam } 1726178354Ssam if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { 1727178354Ssam /* NB: can happen when in promiscuous mode */ 1728178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1729178354Ssam break; 1730178354Ssam } 1731178354Ssam 1732178354Ssam /* 1733178354Ssam * disassoc frame format 1734178354Ssam * [2] reason 1735178354Ssam */ 1736178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); 1737178354Ssam reason = le16toh(*(uint16_t *)frm); 1738178354Ssam 1739178354Ssam vap->iv_stats.is_rx_disassoc++; 1740178354Ssam vap->iv_stats.is_rx_disassoc_code = reason; 1741178354Ssam IEEE80211_NODE_STAT(ni, rx_disassoc); 1742178354Ssam 1743178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 1744178354Ssam "recv disassociate (reason %d)", reason); 1745178354Ssam ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 1746178354Ssam break; 1747178354Ssam } 1748178354Ssam 1749178354Ssam case IEEE80211_FC0_SUBTYPE_ACTION: 1750218927Sbschmidt case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 1751218958Sbschmidt if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 1752218958Sbschmidt !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1753218927Sbschmidt IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1754218958Sbschmidt wh, NULL, "%s", "not for us"); 1755218958Sbschmidt vap->iv_stats.is_rx_mgtdiscard++; 1756218958Sbschmidt } else if (vap->iv_state != IEEE80211_S_RUN) { 1757218958Sbschmidt IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1758218927Sbschmidt wh, NULL, "wrong state %s", 1759218927Sbschmidt ieee80211_state_name[vap->iv_state]); 1760178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1761218958Sbschmidt } else { 1762218958Sbschmidt if (ieee80211_parse_action(ni, m0) == 0) 1763218958Sbschmidt (void)ic->ic_recv_action(ni, wh, frm, efrm); 1764218927Sbschmidt } 1765178354Ssam break; 1766178354Ssam 1767178354Ssam case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 1768178354Ssam case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 1769218927Sbschmidt case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 1770218927Sbschmidt case IEEE80211_FC0_SUBTYPE_ATIM: 1771218927Sbschmidt IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1772218927Sbschmidt wh, NULL, "%s", "not handled"); 1773178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1774218927Sbschmidt break; 1775218927Sbschmidt 1776178354Ssam default: 1777178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1778218927Sbschmidt wh, "mgt", "subtype 0x%x not handled", subtype); 1779178354Ssam vap->iv_stats.is_rx_badsubtype++; 1780178354Ssam break; 1781178354Ssam } 1782178354Ssam#undef ISREASSOC 1783178354Ssam#undef ISPROBE 1784178354Ssam} 1785191546Ssam 1786191546Ssamstatic void 1787205277Srpaulosta_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 1788191546Ssam{ 1789205277Srpaulo switch (subtype) { 1790205277Srpaulo case IEEE80211_FC0_SUBTYPE_BAR: 1791205277Srpaulo ieee80211_recv_bar(ni, m); 1792205277Srpaulo break; 1793205277Srpaulo } 1794191546Ssam} 1795