ieee80211_sta.c revision 260444
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 260444 2014-01-08 08:06:56Z kevlo $"); 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 */ 237178354Ssam case IEEE80211_S_RUN: 238178354Ssam IEEE80211_SEND_MGMT(ni, 239178354Ssam IEEE80211_FC0_SUBTYPE_DISASSOC, 240178354Ssam IEEE80211_REASON_ASSOC_LEAVE); 241178354Ssam ieee80211_sta_leave(ni); 242178354Ssam break; 243178354Ssam case IEEE80211_S_ASSOC: 244178354Ssam IEEE80211_SEND_MGMT(ni, 245178354Ssam IEEE80211_FC0_SUBTYPE_DEAUTH, 246178354Ssam IEEE80211_REASON_AUTH_LEAVE); 247178354Ssam break; 248178354Ssam case IEEE80211_S_SCAN: 249178354Ssam ieee80211_cancel_scan(vap); 250178354Ssam break; 251178354Ssam default: 252178354Ssam goto invalid; 253178354Ssam } 254178354Ssam if (ostate != IEEE80211_S_INIT) { 255178354Ssam /* NB: optimize INIT -> INIT case */ 256178354Ssam ieee80211_reset_bss(vap); 257178354Ssam } 258178354Ssam if (vap->iv_auth->ia_detach != NULL) 259178354Ssam vap->iv_auth->ia_detach(vap); 260178354Ssam break; 261178354Ssam case IEEE80211_S_SCAN: 262178354Ssam switch (ostate) { 263178354Ssam case IEEE80211_S_INIT: 264178354Ssam /* 265178354Ssam * Initiate a scan. We can come here as a result 266178354Ssam * of an IEEE80211_IOC_SCAN_REQ too in which case 267178354Ssam * the vap will be marked with IEEE80211_FEXT_SCANREQ 268178354Ssam * and the scan request parameters will be present 269178354Ssam * in iv_scanreq. Otherwise we do the default. 270178354Ssam */ 271178354Ssam if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) { 272178354Ssam ieee80211_check_scan(vap, 273178354Ssam vap->iv_scanreq_flags, 274178354Ssam vap->iv_scanreq_duration, 275178354Ssam vap->iv_scanreq_mindwell, 276178354Ssam vap->iv_scanreq_maxdwell, 277178354Ssam vap->iv_scanreq_nssid, vap->iv_scanreq_ssid); 278178354Ssam vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ; 279178354Ssam } else 280178354Ssam ieee80211_check_scan_current(vap); 281178354Ssam break; 282178354Ssam case IEEE80211_S_SCAN: 283178354Ssam case IEEE80211_S_AUTH: 284178354Ssam case IEEE80211_S_ASSOC: 285178354Ssam /* 286178354Ssam * These can happen either because of a timeout 287178354Ssam * on an assoc/auth response or because of a 288178354Ssam * change in state that requires a reset. For 289178354Ssam * the former we're called with a non-zero arg 290178354Ssam * that is the cause for the failure; pass this 291178354Ssam * to the scan code so it can update state. 292178354Ssam * Otherwise trigger a new scan unless we're in 293178354Ssam * manual roaming mode in which case an application 294178354Ssam * must issue an explicit scan request. 295178354Ssam */ 296178354Ssam if (arg != 0) 297178354Ssam ieee80211_scan_assoc_fail(vap, 298178354Ssam vap->iv_bss->ni_macaddr, arg); 299178354Ssam if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) 300178354Ssam ieee80211_check_scan_current(vap); 301178354Ssam break; 302178354Ssam case IEEE80211_S_RUN: /* beacon miss */ 303178354Ssam /* 304178354Ssam * Beacon miss. Notify user space and if not 305178354Ssam * under control of a user application (roaming 306178354Ssam * manual) kick off a scan to re-connect. 307178354Ssam */ 308178354Ssam ieee80211_sta_leave(ni); 309178354Ssam if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) 310178354Ssam ieee80211_check_scan_current(vap); 311178354Ssam break; 312178354Ssam default: 313178354Ssam goto invalid; 314178354Ssam } 315178354Ssam break; 316178354Ssam case IEEE80211_S_AUTH: 317178354Ssam switch (ostate) { 318178354Ssam case IEEE80211_S_INIT: 319178354Ssam case IEEE80211_S_SCAN: 320178354Ssam IEEE80211_SEND_MGMT(ni, 321178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 1); 322178354Ssam break; 323178354Ssam case IEEE80211_S_AUTH: 324178354Ssam case IEEE80211_S_ASSOC: 325178354Ssam switch (arg & 0xff) { 326178354Ssam case IEEE80211_FC0_SUBTYPE_AUTH: 327178354Ssam /* ??? */ 328178354Ssam IEEE80211_SEND_MGMT(ni, 329178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 2); 330178354Ssam break; 331178354Ssam case IEEE80211_FC0_SUBTYPE_DEAUTH: 332178354Ssam sta_authretry(vap, ni, arg>>8); 333178354Ssam break; 334178354Ssam } 335178354Ssam break; 336178354Ssam case IEEE80211_S_RUN: 337178354Ssam switch (arg & 0xff) { 338178354Ssam case IEEE80211_FC0_SUBTYPE_AUTH: 339178354Ssam IEEE80211_SEND_MGMT(ni, 340178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 2); 341178354Ssam vap->iv_state = ostate; /* stay RUN */ 342178354Ssam break; 343178354Ssam case IEEE80211_FC0_SUBTYPE_DEAUTH: 344178354Ssam ieee80211_sta_leave(ni); 345178354Ssam if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { 346178354Ssam /* try to reauth */ 347178354Ssam IEEE80211_SEND_MGMT(ni, 348178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 1); 349178354Ssam } 350178354Ssam break; 351178354Ssam } 352178354Ssam break; 353178354Ssam default: 354178354Ssam goto invalid; 355178354Ssam } 356178354Ssam break; 357178354Ssam case IEEE80211_S_ASSOC: 358178354Ssam switch (ostate) { 359178354Ssam case IEEE80211_S_AUTH: 360178354Ssam case IEEE80211_S_ASSOC: 361178354Ssam IEEE80211_SEND_MGMT(ni, 362178354Ssam IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0); 363178354Ssam break; 364178354Ssam case IEEE80211_S_SLEEP: /* cannot happen */ 365178354Ssam case IEEE80211_S_RUN: 366178354Ssam ieee80211_sta_leave(ni); 367178354Ssam if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) { 368178354Ssam IEEE80211_SEND_MGMT(ni, arg ? 369178354Ssam IEEE80211_FC0_SUBTYPE_REASSOC_REQ : 370178354Ssam IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0); 371178354Ssam } 372178354Ssam break; 373178354Ssam default: 374178354Ssam goto invalid; 375178354Ssam } 376178354Ssam break; 377178354Ssam case IEEE80211_S_RUN: 378178354Ssam if (vap->iv_flags & IEEE80211_F_WPA) { 379178354Ssam /* XXX validate prerequisites */ 380178354Ssam } 381178354Ssam switch (ostate) { 382178354Ssam case IEEE80211_S_RUN: 383193439Ssam case IEEE80211_S_CSA: 384178354Ssam break; 385178354Ssam case IEEE80211_S_AUTH: /* when join is done in fw */ 386178354Ssam case IEEE80211_S_ASSOC: 387178354Ssam#ifdef IEEE80211_DEBUG 388178354Ssam if (ieee80211_msg_debug(vap)) { 389178354Ssam ieee80211_note(vap, "%s with %s ssid ", 390178354Ssam (vap->iv_opmode == IEEE80211_M_STA ? 391178354Ssam "associated" : "synchronized"), 392178354Ssam ether_sprintf(ni->ni_bssid)); 393178354Ssam ieee80211_print_essid(vap->iv_bss->ni_essid, 394178354Ssam ni->ni_esslen); 395178354Ssam /* XXX MCS/HT */ 396178354Ssam printf(" channel %d start %uMb\n", 397178354Ssam ieee80211_chan2ieee(ic, ic->ic_curchan), 398178354Ssam IEEE80211_RATE2MBS(ni->ni_txrate)); 399178354Ssam } 400178354Ssam#endif 401178354Ssam ieee80211_scan_assoc_success(vap, ni->ni_macaddr); 402178354Ssam ieee80211_notify_node_join(ni, 403178354Ssam arg == IEEE80211_FC0_SUBTYPE_ASSOC_RESP); 404178354Ssam break; 405178354Ssam case IEEE80211_S_SLEEP: 406241138Sadrian vap->iv_sta_ps(vap, 0); 407178354Ssam break; 408178354Ssam default: 409178354Ssam goto invalid; 410178354Ssam } 411178354Ssam ieee80211_sync_curchan(ic); 412178354Ssam if (ostate != IEEE80211_S_RUN && 413178354Ssam (vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS)) { 414178354Ssam /* 415178354Ssam * Start s/w beacon miss timer for devices w/o 416178354Ssam * hardware support. We fudge a bit here since 417178354Ssam * we're doing this in software. 418178354Ssam */ 419178354Ssam vap->iv_swbmiss_period = IEEE80211_TU_TO_TICKS( 420178354Ssam 2 * vap->iv_bmissthreshold * ni->ni_intval); 421178354Ssam vap->iv_swbmiss_count = 0; 422178354Ssam callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period, 423178354Ssam ieee80211_swbmiss, vap); 424178354Ssam } 425178354Ssam /* 426178354Ssam * When 802.1x is not in use mark the port authorized 427178354Ssam * at this point so traffic can flow. 428178354Ssam */ 429178354Ssam if (ni->ni_authmode != IEEE80211_AUTH_8021X) 430178354Ssam ieee80211_node_authorize(ni); 431184345Ssam /* 432184345Ssam * Fake association when joining an existing bss. 433184345Ssam */ 434184345Ssam if (ic->ic_newassoc != NULL) 435184345Ssam ic->ic_newassoc(vap->iv_bss, ostate != IEEE80211_S_RUN); 436178354Ssam break; 437193439Ssam case IEEE80211_S_CSA: 438193439Ssam if (ostate != IEEE80211_S_RUN) 439193439Ssam goto invalid; 440193439Ssam break; 441178354Ssam case IEEE80211_S_SLEEP: 442241138Sadrian vap->iv_sta_ps(vap, 1); 443178354Ssam break; 444178354Ssam default: 445178354Ssam invalid: 446184268Ssam IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, 447184268Ssam "%s: unexpected state transition %s -> %s\n", __func__, 448178354Ssam ieee80211_state_name[ostate], ieee80211_state_name[nstate]); 449178354Ssam break; 450178354Ssam } 451178354Ssam return 0; 452178354Ssam} 453178354Ssam 454178354Ssam/* 455178354Ssam * Return non-zero if the frame is an echo of a multicast 456178354Ssam * frame sent by ourself. The dir is known to be DSTODS. 457178354Ssam */ 458178354Ssamstatic __inline int 459178354Ssamisdstods_mcastecho(struct ieee80211vap *vap, const struct ieee80211_frame *wh) 460178354Ssam{ 461178354Ssam#define QWH4(wh) ((const struct ieee80211_qosframe_addr4 *)wh) 462178354Ssam#define WH4(wh) ((const struct ieee80211_frame_addr4 *)wh) 463178354Ssam const uint8_t *sa; 464178354Ssam 465178354Ssam KASSERT(vap->iv_opmode == IEEE80211_M_STA, ("wrong mode")); 466178354Ssam 467178354Ssam if (!IEEE80211_IS_MULTICAST(wh->i_addr3)) 468178354Ssam return 0; 469178354Ssam sa = IEEE80211_QOS_HAS_SEQ(wh) ? QWH4(wh)->i_addr4 : WH4(wh)->i_addr4; 470178354Ssam return IEEE80211_ADDR_EQ(sa, vap->iv_myaddr); 471178354Ssam#undef WH4 472178354Ssam#undef QWH4 473178354Ssam} 474178354Ssam 475178354Ssam/* 476178354Ssam * Return non-zero if the frame is an echo of a multicast 477178354Ssam * frame sent by ourself. The dir is known to be FROMDS. 478178354Ssam */ 479178354Ssamstatic __inline int 480178354Ssamisfromds_mcastecho(struct ieee80211vap *vap, const struct ieee80211_frame *wh) 481178354Ssam{ 482178354Ssam KASSERT(vap->iv_opmode == IEEE80211_M_STA, ("wrong mode")); 483178354Ssam 484178354Ssam if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) 485178354Ssam return 0; 486178354Ssam return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr); 487178354Ssam} 488178354Ssam 489178354Ssam/* 490178354Ssam * Decide if a received management frame should be 491178354Ssam * printed when debugging is enabled. This filters some 492178354Ssam * of the less interesting frames that come frequently 493178354Ssam * (e.g. beacons). 494178354Ssam */ 495178354Ssamstatic __inline int 496178354Ssamdoprint(struct ieee80211vap *vap, int subtype) 497178354Ssam{ 498178354Ssam switch (subtype) { 499178354Ssam case IEEE80211_FC0_SUBTYPE_BEACON: 500178354Ssam return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN); 501178354Ssam case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 502178354Ssam return 0; 503178354Ssam } 504178354Ssam return 1; 505178354Ssam} 506178354Ssam 507178354Ssam/* 508178354Ssam * Process a received frame. The node associated with the sender 509178354Ssam * should be supplied. If nothing was found in the node table then 510178354Ssam * the caller is assumed to supply a reference to iv_bss instead. 511178354Ssam * The RSSI and a timestamp are also supplied. The RSSI data is used 512178354Ssam * during AP scanning to select a AP to associate with; it can have 513178354Ssam * any units so long as values have consistent units and higher values 514178354Ssam * mean ``better signal''. The receive timestamp is currently not used 515178354Ssam * by the 802.11 layer. 516178354Ssam */ 517178354Ssamstatic int 518192468Ssamsta_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf) 519178354Ssam{ 520178354Ssam#define HAS_SEQ(type) ((type & 0x4) == 0) 521178354Ssam struct ieee80211vap *vap = ni->ni_vap; 522178354Ssam struct ieee80211com *ic = ni->ni_ic; 523178354Ssam struct ifnet *ifp = vap->iv_ifp; 524178354Ssam struct ieee80211_frame *wh; 525178354Ssam struct ieee80211_key *key; 526178354Ssam struct ether_header *eh; 527203422Srpaulo int hdrspace, need_tap = 1; /* mbuf need to be tapped. */ 528178354Ssam uint8_t dir, type, subtype, qos; 529178354Ssam uint8_t *bssid; 530178354Ssam uint16_t rxseq; 531178354Ssam 532183247Ssam if (m->m_flags & M_AMPDU_MPDU) { 533178354Ssam /* 534178354Ssam * Fastpath for A-MPDU reorder q resubmission. Frames 535183247Ssam * w/ M_AMPDU_MPDU marked have already passed through 536183247Ssam * here but were received out of order and been held on 537183247Ssam * the reorder queue. When resubmitted they are marked 538183247Ssam * with the M_AMPDU_MPDU flag and we can bypass most of 539183247Ssam * the normal processing. 540178354Ssam */ 541178354Ssam wh = mtod(m, struct ieee80211_frame *); 542178354Ssam type = IEEE80211_FC0_TYPE_DATA; 543178354Ssam dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 544178354Ssam subtype = IEEE80211_FC0_SUBTYPE_QOS; 545178354Ssam hdrspace = ieee80211_hdrspace(ic, wh); /* XXX optimize? */ 546178354Ssam goto resubmit_ampdu; 547178354Ssam } 548178354Ssam 549178354Ssam KASSERT(ni != NULL, ("null node")); 550178354Ssam ni->ni_inact = ni->ni_inact_reload; 551178354Ssam 552178354Ssam type = -1; /* undefined */ 553178354Ssam 554178354Ssam if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) { 555178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 556178354Ssam ni->ni_macaddr, NULL, 557178354Ssam "too short (1): len %u", m->m_pkthdr.len); 558178354Ssam vap->iv_stats.is_rx_tooshort++; 559178354Ssam goto out; 560178354Ssam } 561178354Ssam /* 562178354Ssam * Bit of a cheat here, we use a pointer for a 3-address 563178354Ssam * frame format but don't reference fields past outside 564178354Ssam * ieee80211_frame_min w/o first validating the data is 565178354Ssam * present. 566178354Ssam */ 567178354Ssam wh = mtod(m, struct ieee80211_frame *); 568178354Ssam 569178354Ssam if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) != 570178354Ssam IEEE80211_FC0_VERSION_0) { 571178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 572191547Ssam ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x", 573191547Ssam wh->i_fc[0], wh->i_fc[1]); 574178354Ssam vap->iv_stats.is_rx_badversion++; 575178354Ssam goto err; 576178354Ssam } 577178354Ssam 578178354Ssam dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK; 579178354Ssam type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK; 580178354Ssam subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK; 581178354Ssam if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) { 582178354Ssam bssid = wh->i_addr2; 583178354Ssam if (!IEEE80211_ADDR_EQ(bssid, ni->ni_bssid)) { 584178354Ssam /* not interested in */ 585178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 586178354Ssam bssid, NULL, "%s", "not to bss"); 587178354Ssam vap->iv_stats.is_rx_wrongbss++; 588178354Ssam goto out; 589178354Ssam } 590227338Sadrian 591227338Sadrian /* 592227338Sadrian * Some devices may be in a promiscuous mode 593227338Sadrian * where they receive frames for multiple station 594227338Sadrian * addresses. 595227338Sadrian * 596227338Sadrian * If we receive a data frame that isn't 597227338Sadrian * destined to our VAP MAC, drop it. 598227338Sadrian * 599227338Sadrian * XXX TODO: This is only enforced when not scanning; 600227338Sadrian * XXX it assumes a software-driven scan will put the NIC 601227338Sadrian * XXX into a "no data frames" mode before setting this 602227338Sadrian * XXX flag. Otherwise it may be possible that we'll still 603227338Sadrian * XXX process data frames whilst scanning. 604227338Sadrian */ 605227338Sadrian if ((! IEEE80211_IS_MULTICAST(wh->i_addr1)) 606227338Sadrian && (! IEEE80211_ADDR_EQ(wh->i_addr1, IF_LLADDR(ifp)))) { 607227338Sadrian IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 608227338Sadrian bssid, NULL, "not to cur sta: lladdr=%6D, addr1=%6D", 609227338Sadrian IF_LLADDR(ifp), ":", wh->i_addr1, ":"); 610227338Sadrian vap->iv_stats.is_rx_wrongbss++; 611227338Sadrian goto out; 612227338Sadrian } 613227338Sadrian 614178354Ssam IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi); 615192468Ssam ni->ni_noise = nf; 616209022Savatar if (HAS_SEQ(type) && !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 617178354Ssam uint8_t tid = ieee80211_gettid(wh); 618178354Ssam if (IEEE80211_QOS_HAS_SEQ(wh) && 619178354Ssam TID_TO_WME_AC(tid) >= WME_AC_VI) 620178354Ssam ic->ic_wme.wme_hipri_traffic++; 621178354Ssam rxseq = le16toh(*(uint16_t *)wh->i_seq); 622221418Sadrian if (! ieee80211_check_rxseq(ni, wh)) { 623178354Ssam /* duplicate, discard */ 624178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 625178354Ssam bssid, "duplicate", 626178354Ssam "seqno <%u,%u> fragno <%u,%u> tid %u", 627178354Ssam rxseq >> IEEE80211_SEQ_SEQ_SHIFT, 628178354Ssam ni->ni_rxseqs[tid] >> 629178354Ssam IEEE80211_SEQ_SEQ_SHIFT, 630178354Ssam rxseq & IEEE80211_SEQ_FRAG_MASK, 631178354Ssam ni->ni_rxseqs[tid] & 632178354Ssam IEEE80211_SEQ_FRAG_MASK, 633178354Ssam tid); 634178354Ssam vap->iv_stats.is_rx_dup++; 635178354Ssam IEEE80211_NODE_STAT(ni, rx_dup); 636178354Ssam goto out; 637178354Ssam } 638178354Ssam ni->ni_rxseqs[tid] = rxseq; 639178354Ssam } 640178354Ssam } 641178354Ssam 642178354Ssam switch (type) { 643178354Ssam case IEEE80211_FC0_TYPE_DATA: 644178354Ssam hdrspace = ieee80211_hdrspace(ic, wh); 645178354Ssam if (m->m_len < hdrspace && 646178354Ssam (m = m_pullup(m, hdrspace)) == NULL) { 647178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 648178354Ssam ni->ni_macaddr, NULL, 649178354Ssam "data too short: expecting %u", hdrspace); 650178354Ssam vap->iv_stats.is_rx_tooshort++; 651178354Ssam goto out; /* XXX */ 652178354Ssam } 653178354Ssam /* 654183247Ssam * Handle A-MPDU re-ordering. If the frame is to be 655183247Ssam * processed directly then ieee80211_ampdu_reorder 656178354Ssam * will return 0; otherwise it has consumed the mbuf 657178354Ssam * and we should do nothing more with it. 658178354Ssam */ 659183247Ssam if ((m->m_flags & M_AMPDU) && 660178354Ssam (dir == IEEE80211_FC1_DIR_FROMDS || 661178354Ssam dir == IEEE80211_FC1_DIR_DSTODS) && 662178354Ssam ieee80211_ampdu_reorder(ni, m) != 0) { 663178354Ssam m = NULL; 664178354Ssam goto out; 665178354Ssam } 666178354Ssam resubmit_ampdu: 667178354Ssam if (dir == IEEE80211_FC1_DIR_FROMDS) { 668178354Ssam if ((ifp->if_flags & IFF_SIMPLEX) && 669178354Ssam isfromds_mcastecho(vap, wh)) { 670178354Ssam /* 671178354Ssam * In IEEE802.11 network, multicast 672178354Ssam * packets sent from "me" are broadcast 673178354Ssam * from the AP; silently discard for 674178354Ssam * SIMPLEX interface. 675178354Ssam */ 676178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 677178354Ssam wh, "data", "%s", "multicast echo"); 678178354Ssam vap->iv_stats.is_rx_mcastecho++; 679178354Ssam goto out; 680178354Ssam } 681178354Ssam if ((vap->iv_flags & IEEE80211_F_DWDS) && 682178354Ssam IEEE80211_IS_MULTICAST(wh->i_addr1)) { 683178354Ssam /* 684178354Ssam * DWDS sta's must drop 3-address mcast frames 685178354Ssam * as they will be sent separately as a 4-addr 686178354Ssam * frame. Accepting the 3-addr frame will 687178354Ssam * confuse the bridge into thinking the sending 688178354Ssam * sta is located at the end of WDS link. 689178354Ssam */ 690178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 691178354Ssam "3-address data", "%s", "DWDS enabled"); 692178354Ssam vap->iv_stats.is_rx_mcastecho++; 693178354Ssam goto out; 694178354Ssam } 695178354Ssam } else if (dir == IEEE80211_FC1_DIR_DSTODS) { 696178354Ssam if ((vap->iv_flags & IEEE80211_F_DWDS) == 0) { 697178354Ssam IEEE80211_DISCARD(vap, 698178354Ssam IEEE80211_MSG_INPUT, wh, "4-address data", 699178354Ssam "%s", "DWDS not enabled"); 700178354Ssam vap->iv_stats.is_rx_wrongdir++; 701178354Ssam goto out; 702178354Ssam } 703178354Ssam if ((ifp->if_flags & IFF_SIMPLEX) && 704178354Ssam isdstods_mcastecho(vap, wh)) { 705178354Ssam /* 706178354Ssam * In IEEE802.11 network, multicast 707178354Ssam * packets sent from "me" are broadcast 708178354Ssam * from the AP; silently discard for 709178354Ssam * SIMPLEX interface. 710178354Ssam */ 711178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 712178354Ssam "4-address data", "%s", "multicast echo"); 713178354Ssam vap->iv_stats.is_rx_mcastecho++; 714178354Ssam goto out; 715178354Ssam } 716178354Ssam } else { 717178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh, 718178354Ssam "data", "incorrect dir 0x%x", dir); 719178354Ssam vap->iv_stats.is_rx_wrongdir++; 720178354Ssam goto out; 721178354Ssam } 722178354Ssam 723178354Ssam /* 724178354Ssam * Handle privacy requirements. Note that we 725178354Ssam * must not be preempted from here until after 726178354Ssam * we (potentially) call ieee80211_crypto_demic; 727178354Ssam * otherwise we may violate assumptions in the 728178354Ssam * crypto cipher modules used to do delayed update 729178354Ssam * of replay sequence numbers. 730178354Ssam */ 731260444Skevlo if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 732178354Ssam if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 733178354Ssam /* 734178354Ssam * Discard encrypted frames when privacy is off. 735178354Ssam */ 736178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 737178354Ssam wh, "WEP", "%s", "PRIVACY off"); 738178354Ssam vap->iv_stats.is_rx_noprivacy++; 739178354Ssam IEEE80211_NODE_STAT(ni, rx_noprivacy); 740178354Ssam goto out; 741178354Ssam } 742178354Ssam key = ieee80211_crypto_decap(ni, m, hdrspace); 743178354Ssam if (key == NULL) { 744178354Ssam /* NB: stats+msgs handled in crypto_decap */ 745178354Ssam IEEE80211_NODE_STAT(ni, rx_wepfail); 746178354Ssam goto out; 747178354Ssam } 748178354Ssam wh = mtod(m, struct ieee80211_frame *); 749260444Skevlo wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; 750178354Ssam } else { 751178354Ssam /* XXX M_WEP and IEEE80211_F_PRIVACY */ 752178354Ssam key = NULL; 753178354Ssam } 754178354Ssam 755178354Ssam /* 756178354Ssam * Save QoS bits for use below--before we strip the header. 757178354Ssam */ 758178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_QOS) { 759178354Ssam qos = (dir == IEEE80211_FC1_DIR_DSTODS) ? 760178354Ssam ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] : 761178354Ssam ((struct ieee80211_qosframe *)wh)->i_qos[0]; 762178354Ssam } else 763178354Ssam qos = 0; 764178354Ssam 765178354Ssam /* 766178354Ssam * Next up, any fragmentation. 767178354Ssam */ 768178354Ssam if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) { 769178354Ssam m = ieee80211_defrag(ni, m, hdrspace); 770178354Ssam if (m == NULL) { 771178354Ssam /* Fragment dropped or frame not complete yet */ 772178354Ssam goto out; 773178354Ssam } 774178354Ssam } 775178354Ssam wh = NULL; /* no longer valid, catch any uses */ 776178354Ssam 777178354Ssam /* 778178354Ssam * Next strip any MSDU crypto bits. 779178354Ssam */ 780178354Ssam if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) { 781178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 782178354Ssam ni->ni_macaddr, "data", "%s", "demic error"); 783178354Ssam vap->iv_stats.is_rx_demicfail++; 784178354Ssam IEEE80211_NODE_STAT(ni, rx_demicfail); 785178354Ssam goto out; 786178354Ssam } 787178354Ssam 788178354Ssam /* copy to listener after decrypt */ 789192468Ssam if (ieee80211_radiotap_active_vap(vap)) 790202967Srpaulo ieee80211_radiotap_rx(vap, m); 791178354Ssam need_tap = 0; 792178354Ssam 793178354Ssam /* 794178354Ssam * Finally, strip the 802.11 header. 795178354Ssam */ 796178354Ssam m = ieee80211_decap(vap, m, hdrspace); 797178354Ssam if (m == NULL) { 798178354Ssam /* XXX mask bit to check for both */ 799178354Ssam /* don't count Null data frames as errors */ 800178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_NODATA || 801178354Ssam subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL) 802178354Ssam goto out; 803178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 804178354Ssam ni->ni_macaddr, "data", "%s", "decap error"); 805178354Ssam vap->iv_stats.is_rx_decap++; 806178354Ssam IEEE80211_NODE_STAT(ni, rx_decap); 807178354Ssam goto err; 808178354Ssam } 809178354Ssam eh = mtod(m, struct ether_header *); 810178354Ssam if (!ieee80211_node_is_authorized(ni)) { 811178354Ssam /* 812178354Ssam * Deny any non-PAE frames received prior to 813178354Ssam * authorization. For open/shared-key 814178354Ssam * authentication the port is mark authorized 815178354Ssam * after authentication completes. For 802.1x 816178354Ssam * the port is not marked authorized by the 817178354Ssam * authenticator until the handshake has completed. 818178354Ssam */ 819178354Ssam if (eh->ether_type != htons(ETHERTYPE_PAE)) { 820178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT, 821178354Ssam eh->ether_shost, "data", 822178354Ssam "unauthorized port: ether type 0x%x len %u", 823178354Ssam eh->ether_type, m->m_pkthdr.len); 824178354Ssam vap->iv_stats.is_rx_unauth++; 825178354Ssam IEEE80211_NODE_STAT(ni, rx_unauth); 826178354Ssam goto err; 827178354Ssam } 828178354Ssam } else { 829178354Ssam /* 830178354Ssam * When denying unencrypted frames, discard 831178354Ssam * any non-PAE frames received without encryption. 832178354Ssam */ 833178354Ssam if ((vap->iv_flags & IEEE80211_F_DROPUNENC) && 834178354Ssam (key == NULL && (m->m_flags & M_WEP) == 0) && 835178354Ssam eh->ether_type != htons(ETHERTYPE_PAE)) { 836178354Ssam /* 837178354Ssam * Drop unencrypted frames. 838178354Ssam */ 839178354Ssam vap->iv_stats.is_rx_unencrypted++; 840178354Ssam IEEE80211_NODE_STAT(ni, rx_unencrypted); 841178354Ssam goto out; 842178354Ssam } 843178354Ssam } 844178354Ssam /* XXX require HT? */ 845178354Ssam if (qos & IEEE80211_QOS_AMSDU) { 846178354Ssam m = ieee80211_decap_amsdu(ni, m); 847178354Ssam if (m == NULL) 848178354Ssam return IEEE80211_FC0_TYPE_DATA; 849190391Ssam } else { 850190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 851190391Ssam m = ieee80211_decap_fastframe(vap, ni, m); 852190391Ssam if (m == NULL) 853178354Ssam return IEEE80211_FC0_TYPE_DATA; 854190391Ssam#endif 855178354Ssam } 856178354Ssam ieee80211_deliver_data(vap, ni, m); 857178354Ssam return IEEE80211_FC0_TYPE_DATA; 858178354Ssam 859178354Ssam case IEEE80211_FC0_TYPE_MGT: 860178354Ssam vap->iv_stats.is_rx_mgmt++; 861178354Ssam IEEE80211_NODE_STAT(ni, rx_mgmt); 862178354Ssam if (dir != IEEE80211_FC1_DIR_NODS) { 863178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 864178354Ssam wh, "data", "incorrect dir 0x%x", dir); 865178354Ssam vap->iv_stats.is_rx_wrongdir++; 866178354Ssam goto err; 867178354Ssam } 868178354Ssam if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) { 869178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY, 870178354Ssam ni->ni_macaddr, "mgt", "too short: len %u", 871178354Ssam m->m_pkthdr.len); 872178354Ssam vap->iv_stats.is_rx_tooshort++; 873178354Ssam goto out; 874178354Ssam } 875178354Ssam#ifdef IEEE80211_DEBUG 876178354Ssam if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) || 877178354Ssam ieee80211_msg_dumppkts(vap)) { 878178354Ssam if_printf(ifp, "received %s from %s rssi %d\n", 879178354Ssam ieee80211_mgt_subtype_name[subtype >> 880178354Ssam IEEE80211_FC0_SUBTYPE_SHIFT], 881178354Ssam ether_sprintf(wh->i_addr2), rssi); 882178354Ssam } 883178354Ssam#endif 884260444Skevlo if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) { 885178354Ssam if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) { 886178354Ssam /* 887178354Ssam * Only shared key auth frames with a challenge 888178354Ssam * should be encrypted, discard all others. 889178354Ssam */ 890178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 891178354Ssam wh, ieee80211_mgt_subtype_name[subtype >> 892178354Ssam IEEE80211_FC0_SUBTYPE_SHIFT], 893178354Ssam "%s", "WEP set but not permitted"); 894178354Ssam vap->iv_stats.is_rx_mgtdiscard++; /* XXX */ 895178354Ssam goto out; 896178354Ssam } 897178354Ssam if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 898178354Ssam /* 899178354Ssam * Discard encrypted frames when privacy is off. 900178354Ssam */ 901178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 902178354Ssam wh, "mgt", "%s", "WEP set but PRIVACY off"); 903178354Ssam vap->iv_stats.is_rx_noprivacy++; 904178354Ssam goto out; 905178354Ssam } 906178354Ssam hdrspace = ieee80211_hdrspace(ic, wh); 907178354Ssam key = ieee80211_crypto_decap(ni, m, hdrspace); 908178354Ssam if (key == NULL) { 909178354Ssam /* NB: stats+msgs handled in crypto_decap */ 910178354Ssam goto out; 911178354Ssam } 912178354Ssam wh = mtod(m, struct ieee80211_frame *); 913260444Skevlo wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED; 914178354Ssam } 915192468Ssam vap->iv_recv_mgmt(ni, m, subtype, rssi, nf); 916191534Ssam goto out; 917178354Ssam 918178354Ssam case IEEE80211_FC0_TYPE_CTL: 919178354Ssam vap->iv_stats.is_rx_ctl++; 920178354Ssam IEEE80211_NODE_STAT(ni, rx_ctrl); 921191546Ssam vap->iv_recv_ctl(ni, m, subtype); 922178354Ssam goto out; 923191549Ssam 924178354Ssam default: 925178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 926178354Ssam wh, NULL, "bad frame type 0x%x", type); 927178354Ssam /* should not come here */ 928178354Ssam break; 929178354Ssam } 930178354Ssamerr: 931178354Ssam ifp->if_ierrors++; 932178354Ssamout: 933178354Ssam if (m != NULL) { 934192765Ssam if (need_tap && ieee80211_radiotap_active_vap(vap)) 935192468Ssam ieee80211_radiotap_rx(vap, m); 936178354Ssam m_freem(m); 937178354Ssam } 938178354Ssam return type; 939178354Ssam} 940178354Ssam 941178354Ssamstatic void 942178354Ssamsta_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh, 943192468Ssam int rssi, int nf, uint16_t seq, uint16_t status) 944178354Ssam{ 945178354Ssam struct ieee80211vap *vap = ni->ni_vap; 946178354Ssam 947178354Ssam if (ni->ni_authmode == IEEE80211_AUTH_SHARED) { 948178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 949178354Ssam ni->ni_macaddr, "open auth", 950178354Ssam "bad sta auth mode %u", ni->ni_authmode); 951178354Ssam vap->iv_stats.is_rx_bad_auth++; /* XXX */ 952178354Ssam return; 953178354Ssam } 954178354Ssam if (vap->iv_state != IEEE80211_S_AUTH || 955178354Ssam seq != IEEE80211_AUTH_OPEN_RESPONSE) { 956178354Ssam vap->iv_stats.is_rx_bad_auth++; 957178354Ssam return; 958178354Ssam } 959178354Ssam if (status != 0) { 960178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, 961178354Ssam ni, "open auth failed (reason %d)", status); 962178354Ssam vap->iv_stats.is_rx_auth_fail++; 963178354Ssam vap->iv_stats.is_rx_authfail_code = status; 964178354Ssam ieee80211_new_state(vap, IEEE80211_S_SCAN, 965178354Ssam IEEE80211_SCAN_FAIL_STATUS); 966178354Ssam } else 967178354Ssam ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 968178354Ssam} 969178354Ssam 970178354Ssamstatic void 971178354Ssamsta_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh, 972192468Ssam uint8_t *frm, uint8_t *efrm, int rssi, int nf, 973178354Ssam uint16_t seq, uint16_t status) 974178354Ssam{ 975178354Ssam struct ieee80211vap *vap = ni->ni_vap; 976178354Ssam uint8_t *challenge; 977178354Ssam int estatus; 978178354Ssam 979178354Ssam /* 980178354Ssam * NB: this can happen as we allow pre-shared key 981178354Ssam * authentication to be enabled w/o wep being turned 982178354Ssam * on so that configuration of these can be done 983178354Ssam * in any order. It may be better to enforce the 984178354Ssam * ordering in which case this check would just be 985178354Ssam * for sanity/consistency. 986178354Ssam */ 987178354Ssam if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) { 988178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 989178354Ssam ni->ni_macaddr, "shared key auth", 990178354Ssam "%s", " PRIVACY is disabled"); 991178354Ssam estatus = IEEE80211_STATUS_ALG; 992178354Ssam goto bad; 993178354Ssam } 994178354Ssam /* 995178354Ssam * Pre-shared key authentication is evil; accept 996178354Ssam * it only if explicitly configured (it is supported 997178354Ssam * mainly for compatibility with clients like OS X). 998178354Ssam */ 999178354Ssam if (ni->ni_authmode != IEEE80211_AUTH_AUTO && 1000178354Ssam ni->ni_authmode != IEEE80211_AUTH_SHARED) { 1001178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1002178354Ssam ni->ni_macaddr, "shared key auth", 1003178354Ssam "bad sta auth mode %u", ni->ni_authmode); 1004178354Ssam vap->iv_stats.is_rx_bad_auth++; /* XXX maybe a unique error? */ 1005178354Ssam estatus = IEEE80211_STATUS_ALG; 1006178354Ssam goto bad; 1007178354Ssam } 1008178354Ssam 1009178354Ssam challenge = NULL; 1010178354Ssam if (frm + 1 < efrm) { 1011178354Ssam if ((frm[1] + 2) > (efrm - frm)) { 1012178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1013178354Ssam ni->ni_macaddr, "shared key auth", 1014178354Ssam "ie %d/%d too long", 1015178354Ssam frm[0], (frm[1] + 2) - (efrm - frm)); 1016178354Ssam vap->iv_stats.is_rx_bad_auth++; 1017178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1018178354Ssam goto bad; 1019178354Ssam } 1020178354Ssam if (*frm == IEEE80211_ELEMID_CHALLENGE) 1021178354Ssam challenge = frm; 1022178354Ssam frm += frm[1] + 2; 1023178354Ssam } 1024178354Ssam switch (seq) { 1025178354Ssam case IEEE80211_AUTH_SHARED_CHALLENGE: 1026178354Ssam case IEEE80211_AUTH_SHARED_RESPONSE: 1027178354Ssam if (challenge == NULL) { 1028178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1029178354Ssam ni->ni_macaddr, "shared key auth", 1030178354Ssam "%s", "no challenge"); 1031178354Ssam vap->iv_stats.is_rx_bad_auth++; 1032178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1033178354Ssam goto bad; 1034178354Ssam } 1035178354Ssam if (challenge[1] != IEEE80211_CHALLENGE_LEN) { 1036178354Ssam IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH, 1037178354Ssam ni->ni_macaddr, "shared key auth", 1038178354Ssam "bad challenge len %d", challenge[1]); 1039178354Ssam vap->iv_stats.is_rx_bad_auth++; 1040178354Ssam estatus = IEEE80211_STATUS_CHALLENGE; 1041178354Ssam goto bad; 1042178354Ssam } 1043178354Ssam default: 1044178354Ssam break; 1045178354Ssam } 1046178354Ssam if (vap->iv_state != IEEE80211_S_AUTH) 1047178354Ssam return; 1048178354Ssam switch (seq) { 1049178354Ssam case IEEE80211_AUTH_SHARED_PASS: 1050178354Ssam if (ni->ni_challenge != NULL) { 1051186302Ssam free(ni->ni_challenge, M_80211_NODE); 1052178354Ssam ni->ni_challenge = NULL; 1053178354Ssam } 1054178354Ssam if (status != 0) { 1055178354Ssam IEEE80211_NOTE_FRAME(vap, 1056178354Ssam IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, wh, 1057178354Ssam "shared key auth failed (reason %d)", status); 1058178354Ssam vap->iv_stats.is_rx_auth_fail++; 1059178354Ssam vap->iv_stats.is_rx_authfail_code = status; 1060178354Ssam return; 1061178354Ssam } 1062178354Ssam ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 1063178354Ssam break; 1064178354Ssam case IEEE80211_AUTH_SHARED_CHALLENGE: 1065178354Ssam if (!ieee80211_alloc_challenge(ni)) 1066178354Ssam return; 1067178354Ssam /* XXX could optimize by passing recvd challenge */ 1068178354Ssam memcpy(ni->ni_challenge, &challenge[2], challenge[1]); 1069178354Ssam IEEE80211_SEND_MGMT(ni, 1070178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, seq + 1); 1071178354Ssam break; 1072178354Ssam default: 1073178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_AUTH, 1074178354Ssam wh, "shared key auth", "bad seq %d", seq); 1075178354Ssam vap->iv_stats.is_rx_bad_auth++; 1076178354Ssam return; 1077178354Ssam } 1078178354Ssam return; 1079178354Ssambad: 1080178354Ssam /* 1081178354Ssam * Kick the state machine. This short-circuits 1082178354Ssam * using the mgt frame timeout to trigger the 1083178354Ssam * state transition. 1084178354Ssam */ 1085178354Ssam if (vap->iv_state == IEEE80211_S_AUTH) 1086178354Ssam ieee80211_new_state(vap, IEEE80211_S_SCAN, 1087178354Ssam IEEE80211_SCAN_FAIL_STATUS); 1088178354Ssam} 1089178354Ssam 1090244060Sadrianint 1091178354Ssamieee80211_parse_wmeparams(struct ieee80211vap *vap, uint8_t *frm, 1092178354Ssam const struct ieee80211_frame *wh) 1093178354Ssam{ 1094178354Ssam#define MS(_v, _f) (((_v) & _f) >> _f##_S) 1095178354Ssam struct ieee80211_wme_state *wme = &vap->iv_ic->ic_wme; 1096178354Ssam u_int len = frm[1], qosinfo; 1097178354Ssam int i; 1098178354Ssam 1099178354Ssam if (len < sizeof(struct ieee80211_wme_param)-2) { 1100178354Ssam IEEE80211_DISCARD_IE(vap, 1101178354Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_WME, 1102178354Ssam wh, "WME", "too short, len %u", len); 1103178354Ssam return -1; 1104178354Ssam } 1105178354Ssam qosinfo = frm[__offsetof(struct ieee80211_wme_param, param_qosInfo)]; 1106178354Ssam qosinfo &= WME_QOSINFO_COUNT; 1107178354Ssam /* XXX do proper check for wraparound */ 1108178354Ssam if (qosinfo == wme->wme_wmeChanParams.cap_info) 1109178354Ssam return 0; 1110178354Ssam frm += __offsetof(struct ieee80211_wme_param, params_acParams); 1111178354Ssam for (i = 0; i < WME_NUM_AC; i++) { 1112178354Ssam struct wmeParams *wmep = 1113178354Ssam &wme->wme_wmeChanParams.cap_wmeParams[i]; 1114178354Ssam /* NB: ACI not used */ 1115178354Ssam wmep->wmep_acm = MS(frm[0], WME_PARAM_ACM); 1116178354Ssam wmep->wmep_aifsn = MS(frm[0], WME_PARAM_AIFSN); 1117178354Ssam wmep->wmep_logcwmin = MS(frm[1], WME_PARAM_LOGCWMIN); 1118178354Ssam wmep->wmep_logcwmax = MS(frm[1], WME_PARAM_LOGCWMAX); 1119178354Ssam wmep->wmep_txopLimit = LE_READ_2(frm+2); 1120178354Ssam frm += 4; 1121178354Ssam } 1122178354Ssam wme->wme_wmeChanParams.cap_info = qosinfo; 1123178354Ssam return 1; 1124178354Ssam#undef MS 1125178354Ssam} 1126178354Ssam 1127178354Ssam/* 1128193439Ssam * Process 11h Channel Switch Announcement (CSA) ie. If this 1129193439Ssam * is the first CSA then initiate the switch. Otherwise we 1130193439Ssam * track state and trigger completion and/or cancel of the switch. 1131193439Ssam * XXX should be public for IBSS use 1132193439Ssam */ 1133193439Ssamstatic void 1134193439Ssamieee80211_parse_csaparams(struct ieee80211vap *vap, uint8_t *frm, 1135193439Ssam const struct ieee80211_frame *wh) 1136193439Ssam{ 1137193439Ssam struct ieee80211com *ic = vap->iv_ic; 1138193439Ssam const struct ieee80211_csa_ie *csa = 1139193439Ssam (const struct ieee80211_csa_ie *) frm; 1140193439Ssam 1141193439Ssam KASSERT(vap->iv_state >= IEEE80211_S_RUN, 1142193439Ssam ("state %s", ieee80211_state_name[vap->iv_state])); 1143193439Ssam 1144193439Ssam if (csa->csa_mode > 1) { 1145193439Ssam IEEE80211_DISCARD_IE(vap, 1146193439Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1147193439Ssam wh, "CSA", "invalid mode %u", csa->csa_mode); 1148193439Ssam return; 1149193439Ssam } 1150193439Ssam IEEE80211_LOCK(ic); 1151193439Ssam if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) { 1152193439Ssam /* 1153193439Ssam * Convert the channel number to a channel reference. We 1154193439Ssam * try first to preserve turbo attribute of the current 1155193439Ssam * channel then fallback. Note this will not work if the 1156193439Ssam * CSA specifies a channel that requires a band switch (e.g. 1157193439Ssam * 11a => 11g). This is intentional as 11h is defined only 1158193439Ssam * for 5GHz/11a and because the switch does not involve a 1159193439Ssam * reassociation, protocol state (capabilities, negotated 1160193439Ssam * rates, etc) may/will be wrong. 1161193439Ssam */ 1162193439Ssam struct ieee80211_channel *c = 1163193439Ssam ieee80211_find_channel_byieee(ic, csa->csa_newchan, 1164193439Ssam (ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALLTURBO)); 1165193439Ssam if (c == NULL) { 1166193439Ssam c = ieee80211_find_channel_byieee(ic, 1167193439Ssam csa->csa_newchan, 1168193439Ssam (ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALL)); 1169193439Ssam if (c == NULL) { 1170193439Ssam IEEE80211_DISCARD_IE(vap, 1171193439Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1172193439Ssam wh, "CSA", "invalid channel %u", 1173193439Ssam csa->csa_newchan); 1174193439Ssam goto done; 1175193439Ssam } 1176193439Ssam } 1177193439Ssam#if IEEE80211_CSA_COUNT_MIN > 0 1178193439Ssam if (csa->csa_count < IEEE80211_CSA_COUNT_MIN) { 1179193439Ssam /* 1180193439Ssam * Require at least IEEE80211_CSA_COUNT_MIN count to 1181193439Ssam * reduce the risk of being redirected by a fabricated 1182193439Ssam * CSA. If a valid CSA is dropped we'll still get a 1183193439Ssam * beacon miss when the AP leaves the channel so we'll 1184193439Ssam * eventually follow to the new channel. 1185193439Ssam * 1186193439Ssam * NOTE: this violates the 11h spec that states that 1187193439Ssam * count may be any value and if 0 then a switch 1188193439Ssam * should happen asap. 1189193439Ssam */ 1190193439Ssam IEEE80211_DISCARD_IE(vap, 1191193439Ssam IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH, 1192193439Ssam wh, "CSA", "count %u too small, must be >= %u", 1193193439Ssam csa->csa_count, IEEE80211_CSA_COUNT_MIN); 1194193439Ssam goto done; 1195193439Ssam } 1196193439Ssam#endif 1197193439Ssam ieee80211_csa_startswitch(ic, c, csa->csa_mode, csa->csa_count); 1198193439Ssam } else { 1199193439Ssam /* 1200193439Ssam * Validate this ie against the initial CSA. We require 1201193439Ssam * mode and channel not change and the count must be 1202193439Ssam * monotonically decreasing. This may be pointless and 1203193439Ssam * canceling the switch as a result may be too paranoid but 1204193439Ssam * in the worst case if we drop out of CSA because of this 1205193439Ssam * and the AP does move then we'll just end up taking a 1206193439Ssam * beacon miss and scan to find the AP. 1207193439Ssam * 1208193439Ssam * XXX may want <= on count as we also process ProbeResp 1209193439Ssam * frames and those may come in w/ the same count as the 1210193439Ssam * previous beacon; but doing so leaves us open to a stuck 1211193439Ssam * count until we add a dead-man timer 1212193439Ssam */ 1213193439Ssam if (!(csa->csa_count < ic->ic_csa_count && 1214193439Ssam csa->csa_mode == ic->ic_csa_mode && 1215193439Ssam csa->csa_newchan == ieee80211_chan2ieee(ic, ic->ic_csa_newchan))) { 1216193439Ssam IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_DOTH, wh, 1217193439Ssam "CSA ie mismatch, initial ie <%d,%d,%d>, " 1218193439Ssam "this ie <%d,%d,%d>", ic->ic_csa_mode, 1219193439Ssam ic->ic_csa_newchan, ic->ic_csa_count, 1220193439Ssam csa->csa_mode, csa->csa_newchan, csa->csa_count); 1221193439Ssam ieee80211_csa_cancelswitch(ic); 1222193439Ssam } else { 1223193439Ssam if (csa->csa_count <= 1) 1224193439Ssam ieee80211_csa_completeswitch(ic); 1225193439Ssam else 1226193439Ssam ic->ic_csa_count = csa->csa_count; 1227193439Ssam } 1228193439Ssam } 1229193439Ssamdone: 1230193439Ssam IEEE80211_UNLOCK(ic); 1231193439Ssam} 1232193439Ssam 1233193439Ssam/* 1234178354Ssam * Return non-zero if a background scan may be continued: 1235178354Ssam * o bg scan is active 1236178354Ssam * o no channel switch is pending 1237178354Ssam * o there has not been any traffic recently 1238178354Ssam * 1239178354Ssam * Note we do not check if there is an administrative enable; 1240178354Ssam * this is only done to start the scan. We assume that any 1241178354Ssam * change in state will be accompanied by a request to cancel 1242178354Ssam * active scans which will otherwise cause this test to fail. 1243178354Ssam */ 1244178354Ssamstatic __inline int 1245178354Ssamcontbgscan(struct ieee80211vap *vap) 1246178354Ssam{ 1247178354Ssam struct ieee80211com *ic = vap->iv_ic; 1248178354Ssam 1249178354Ssam return ((ic->ic_flags_ext & IEEE80211_FEXT_BGSCAN) && 1250178354Ssam (ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 && 1251178354Ssam vap->iv_state == IEEE80211_S_RUN && /* XXX? */ 1252178354Ssam time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle)); 1253178354Ssam} 1254178354Ssam 1255178354Ssam/* 1256178354Ssam * Return non-zero if a backgrond scan may be started: 1257178354Ssam * o bg scanning is administratively enabled 1258178354Ssam * o no channel switch is pending 1259178354Ssam * o we are not boosted on a dynamic turbo channel 1260178354Ssam * o there has not been a scan recently 1261178354Ssam * o there has not been any traffic recently 1262178354Ssam */ 1263178354Ssamstatic __inline int 1264178354Ssamstartbgscan(struct ieee80211vap *vap) 1265178354Ssam{ 1266178354Ssam struct ieee80211com *ic = vap->iv_ic; 1267178354Ssam 1268178354Ssam return ((vap->iv_flags & IEEE80211_F_BGSCAN) && 1269178354Ssam (ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 && 1270190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 1271178354Ssam !IEEE80211_IS_CHAN_DTURBO(ic->ic_curchan) && 1272190391Ssam#endif 1273178354Ssam time_after(ticks, ic->ic_lastscan + vap->iv_bgscanintvl) && 1274178354Ssam time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle)); 1275178354Ssam} 1276178354Ssam 1277178354Ssamstatic void 1278178354Ssamsta_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0, 1279192468Ssam int subtype, int rssi, int nf) 1280178354Ssam{ 1281178354Ssam#define ISPROBE(_st) ((_st) == IEEE80211_FC0_SUBTYPE_PROBE_RESP) 1282178354Ssam#define ISREASSOC(_st) ((_st) == IEEE80211_FC0_SUBTYPE_REASSOC_RESP) 1283178354Ssam struct ieee80211vap *vap = ni->ni_vap; 1284178354Ssam struct ieee80211com *ic = ni->ni_ic; 1285178354Ssam struct ieee80211_frame *wh; 1286178354Ssam uint8_t *frm, *efrm; 1287178354Ssam uint8_t *rates, *xrates, *wme, *htcap, *htinfo; 1288178354Ssam uint8_t rate; 1289233452Sadrian int ht_state_change = 0; 1290178354Ssam 1291178354Ssam wh = mtod(m0, struct ieee80211_frame *); 1292178354Ssam frm = (uint8_t *)&wh[1]; 1293178354Ssam efrm = mtod(m0, uint8_t *) + m0->m_len; 1294178354Ssam switch (subtype) { 1295178354Ssam case IEEE80211_FC0_SUBTYPE_PROBE_RESP: 1296178354Ssam case IEEE80211_FC0_SUBTYPE_BEACON: { 1297178354Ssam struct ieee80211_scanparams scan; 1298178354Ssam /* 1299178354Ssam * We process beacon/probe response frames: 1300178354Ssam * o when scanning, or 1301178354Ssam * o station mode when associated (to collect state 1302191444Srpaulo * updates such as 802.11g slot time) 1303178354Ssam * Frames otherwise received are discarded. 1304178354Ssam */ 1305178354Ssam if (!((ic->ic_flags & IEEE80211_F_SCAN) || ni->ni_associd)) { 1306178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1307178354Ssam return; 1308178354Ssam } 1309178354Ssam /* XXX probe response in sta mode when !scanning? */ 1310232244Sadrian if (ieee80211_parse_beacon(ni, m0, &scan) != 0) { 1311232270Sadrian if (! (ic->ic_flags & IEEE80211_F_SCAN)) 1312232270Sadrian vap->iv_stats.is_beacon_bad++; 1313178354Ssam return; 1314232244Sadrian } 1315178354Ssam /* 1316178354Ssam * Count frame now that we know it's to be processed. 1317178354Ssam */ 1318178354Ssam if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) { 1319178354Ssam vap->iv_stats.is_rx_beacon++; /* XXX remove */ 1320178354Ssam IEEE80211_NODE_STAT(ni, rx_beacons); 1321178354Ssam } else 1322178354Ssam IEEE80211_NODE_STAT(ni, rx_proberesp); 1323178354Ssam /* 1324178354Ssam * When operating in station mode, check for state updates. 1325178354Ssam * Be careful to ignore beacons received while doing a 1326178354Ssam * background scan. We consider only 11g/WMM stuff right now. 1327178354Ssam */ 1328178354Ssam if (ni->ni_associd != 0 && 1329178354Ssam ((ic->ic_flags & IEEE80211_F_SCAN) == 0 || 1330178354Ssam IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_bssid))) { 1331178354Ssam /* record tsf of last beacon */ 1332178354Ssam memcpy(ni->ni_tstamp.data, scan.tstamp, 1333178354Ssam sizeof(ni->ni_tstamp)); 1334178354Ssam /* count beacon frame for s/w bmiss handling */ 1335178354Ssam vap->iv_swbmiss_count++; 1336178354Ssam vap->iv_bmiss_count = 0; 1337178354Ssam if (ni->ni_erp != scan.erp) { 1338178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1339178354Ssam wh->i_addr2, 1340178354Ssam "erp change: was 0x%x, now 0x%x", 1341178354Ssam ni->ni_erp, scan.erp); 1342178354Ssam if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 1343178354Ssam (ni->ni_erp & IEEE80211_ERP_USE_PROTECTION)) 1344178354Ssam ic->ic_flags |= IEEE80211_F_USEPROT; 1345178354Ssam else 1346178354Ssam ic->ic_flags &= ~IEEE80211_F_USEPROT; 1347178354Ssam ni->ni_erp = scan.erp; 1348178354Ssam /* XXX statistic */ 1349178354Ssam /* XXX driver notification */ 1350178354Ssam } 1351178354Ssam if ((ni->ni_capinfo ^ scan.capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME) { 1352178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1353178354Ssam wh->i_addr2, 1354178354Ssam "capabilities change: was 0x%x, now 0x%x", 1355178354Ssam ni->ni_capinfo, scan.capinfo); 1356178354Ssam /* 1357178354Ssam * NB: we assume short preamble doesn't 1358178354Ssam * change dynamically 1359178354Ssam */ 1360178354Ssam ieee80211_set_shortslottime(ic, 1361178354Ssam IEEE80211_IS_CHAN_A(ic->ic_bsschan) || 1362178354Ssam (scan.capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)); 1363178354Ssam ni->ni_capinfo = (ni->ni_capinfo &~ IEEE80211_CAPINFO_SHORT_SLOTTIME) 1364178354Ssam | (scan.capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME); 1365178354Ssam /* XXX statistic */ 1366178354Ssam } 1367178354Ssam if (scan.wme != NULL && 1368178354Ssam (ni->ni_flags & IEEE80211_NODE_QOS) && 1369178354Ssam ieee80211_parse_wmeparams(vap, scan.wme, wh) > 0) 1370178354Ssam ieee80211_wme_updateparams(vap); 1371190391Ssam#ifdef IEEE80211_SUPPORT_SUPERG 1372178354Ssam if (scan.ath != NULL) 1373178354Ssam ieee80211_parse_athparams(ni, scan.ath, wh); 1374190391Ssam#endif 1375183254Ssam if (scan.htcap != NULL && scan.htinfo != NULL && 1376193655Ssam (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1377178354Ssam /* XXX state changes? */ 1378233452Sadrian if (ieee80211_ht_updateparams(ni, 1379233452Sadrian scan.htcap, scan.htinfo)) 1380233452Sadrian ht_state_change = 1; 1381178354Ssam } 1382227331Sadrian if (scan.quiet) 1383227331Sadrian ic->ic_set_quiet(ni, scan.quiet); 1384178354Ssam if (scan.tim != NULL) { 1385178354Ssam struct ieee80211_tim_ie *tim = 1386178354Ssam (struct ieee80211_tim_ie *) scan.tim; 1387178354Ssam#if 0 1388178354Ssam int aid = IEEE80211_AID(ni->ni_associd); 1389178354Ssam int ix = aid / NBBY; 1390178354Ssam int min = tim->tim_bitctl &~ 1; 1391178354Ssam int max = tim->tim_len + min - 4; 1392178354Ssam if ((tim->tim_bitctl&1) || 1393178354Ssam (min <= ix && ix <= max && 1394178354Ssam isset(tim->tim_bitmap - min, aid))) { 1395178354Ssam /* 1396178354Ssam * XXX Do not let bg scan kick off 1397178354Ssam * we are expecting data. 1398178354Ssam */ 1399178354Ssam ic->ic_lastdata = ticks; 1400241138Sadrian vap->iv_sta_ps(vap, 0); 1401178354Ssam } 1402178354Ssam#endif 1403178354Ssam ni->ni_dtim_count = tim->tim_count; 1404178354Ssam ni->ni_dtim_period = tim->tim_period; 1405178354Ssam } 1406193439Ssam if (scan.csa != NULL && 1407193439Ssam (vap->iv_flags & IEEE80211_F_DOTH)) 1408193439Ssam ieee80211_parse_csaparams(vap, scan.csa, wh); 1409193439Ssam else if (ic->ic_flags & IEEE80211_F_CSAPENDING) { 1410193439Ssam /* 1411193439Ssam * No CSA ie or 11h disabled, but a channel 1412193439Ssam * switch is pending; drop out so we aren't 1413193439Ssam * stuck in CSA state. If the AP really is 1414193439Ssam * moving we'll get a beacon miss and scan. 1415193439Ssam */ 1416193439Ssam IEEE80211_LOCK(ic); 1417193439Ssam ieee80211_csa_cancelswitch(ic); 1418193439Ssam IEEE80211_UNLOCK(ic); 1419193439Ssam } 1420178354Ssam /* 1421178354Ssam * If scanning, pass the info to the scan module. 1422178354Ssam * Otherwise, check if it's the right time to do 1423178354Ssam * a background scan. Background scanning must 1424178354Ssam * be enabled and we must not be operating in the 1425178354Ssam * turbo phase of dynamic turbo mode. Then, 1426178354Ssam * it's been a while since the last background 1427178354Ssam * scan and if no data frames have come through 1428178354Ssam * recently, kick off a scan. Note that this 1429178354Ssam * is the mechanism by which a background scan 1430178354Ssam * is started _and_ continued each time we 1431178354Ssam * return on-channel to receive a beacon from 1432178354Ssam * our ap. 1433178354Ssam */ 1434178354Ssam if (ic->ic_flags & IEEE80211_F_SCAN) { 1435178354Ssam ieee80211_add_scan(vap, &scan, wh, 1436192468Ssam subtype, rssi, nf); 1437178354Ssam } else if (contbgscan(vap)) { 1438178354Ssam ieee80211_bg_scan(vap, 0); 1439178354Ssam } else if (startbgscan(vap)) { 1440178354Ssam vap->iv_stats.is_scan_bg++; 1441178354Ssam#if 0 1442178354Ssam /* wakeup if we are sleeing */ 1443178354Ssam ieee80211_set_pwrsave(vap, 0); 1444178354Ssam#endif 1445178354Ssam ieee80211_bg_scan(vap, 0); 1446178354Ssam } 1447233452Sadrian 1448233452Sadrian /* 1449233452Sadrian * If we've had a channel width change (eg HT20<->HT40) 1450233452Sadrian * then schedule a delayed driver notification. 1451233452Sadrian */ 1452233452Sadrian if (ht_state_change) 1453233452Sadrian ieee80211_update_chw(ic); 1454178354Ssam return; 1455178354Ssam } 1456178354Ssam /* 1457178354Ssam * If scanning, just pass information to the scan module. 1458178354Ssam */ 1459178354Ssam if (ic->ic_flags & IEEE80211_F_SCAN) { 1460178354Ssam if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) { 1461178354Ssam /* 1462178354Ssam * Actively scanning a channel marked passive; 1463178354Ssam * send a probe request now that we know there 1464178354Ssam * is 802.11 traffic present. 1465178354Ssam * 1466178354Ssam * XXX check if the beacon we recv'd gives 1467178354Ssam * us what we need and suppress the probe req 1468178354Ssam */ 1469178354Ssam ieee80211_probe_curchan(vap, 1); 1470178354Ssam ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN; 1471178354Ssam } 1472192468Ssam ieee80211_add_scan(vap, &scan, wh, subtype, rssi, nf); 1473178354Ssam return; 1474178354Ssam } 1475178354Ssam break; 1476178354Ssam } 1477178354Ssam 1478178354Ssam case IEEE80211_FC0_SUBTYPE_AUTH: { 1479178354Ssam uint16_t algo, seq, status; 1480178354Ssam /* 1481178354Ssam * auth frame format 1482178354Ssam * [2] algorithm 1483178354Ssam * [2] sequence 1484178354Ssam * [2] status 1485178354Ssam * [tlv*] challenge 1486178354Ssam */ 1487178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return); 1488178354Ssam algo = le16toh(*(uint16_t *)frm); 1489178354Ssam seq = le16toh(*(uint16_t *)(frm + 2)); 1490178354Ssam status = le16toh(*(uint16_t *)(frm + 4)); 1491178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr2, 1492178354Ssam "recv auth frame with algorithm %d seq %d", algo, seq); 1493178354Ssam 1494178354Ssam if (vap->iv_flags & IEEE80211_F_COUNTERM) { 1495178354Ssam IEEE80211_DISCARD(vap, 1496178354Ssam IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO, 1497178354Ssam wh, "auth", "%s", "TKIP countermeasures enabled"); 1498178354Ssam vap->iv_stats.is_rx_auth_countermeasures++; 1499178354Ssam if (vap->iv_opmode == IEEE80211_M_HOSTAP) { 1500178354Ssam ieee80211_send_error(ni, wh->i_addr2, 1501178354Ssam IEEE80211_FC0_SUBTYPE_AUTH, 1502178354Ssam IEEE80211_REASON_MIC_FAILURE); 1503178354Ssam } 1504178354Ssam return; 1505178354Ssam } 1506178354Ssam if (algo == IEEE80211_AUTH_ALG_SHARED) 1507192468Ssam sta_auth_shared(ni, wh, frm + 6, efrm, rssi, nf, 1508192468Ssam seq, status); 1509178354Ssam else if (algo == IEEE80211_AUTH_ALG_OPEN) 1510192468Ssam sta_auth_open(ni, wh, rssi, nf, seq, status); 1511178354Ssam else { 1512178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1513178354Ssam wh, "auth", "unsupported alg %d", algo); 1514178354Ssam vap->iv_stats.is_rx_auth_unsupported++; 1515178354Ssam return; 1516178354Ssam } 1517178354Ssam break; 1518178354Ssam } 1519178354Ssam 1520178354Ssam case IEEE80211_FC0_SUBTYPE_ASSOC_RESP: 1521178354Ssam case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: { 1522178354Ssam uint16_t capinfo, associd; 1523178354Ssam uint16_t status; 1524178354Ssam 1525178354Ssam if (vap->iv_state != IEEE80211_S_ASSOC) { 1526178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1527178354Ssam return; 1528178354Ssam } 1529178354Ssam 1530178354Ssam /* 1531178354Ssam * asresp frame format 1532178354Ssam * [2] capability information 1533178354Ssam * [2] status 1534178354Ssam * [2] association ID 1535178354Ssam * [tlv] supported rates 1536178354Ssam * [tlv] extended supported rates 1537178354Ssam * [tlv] WME 1538178354Ssam * [tlv] HT capabilities 1539178354Ssam * [tlv] HT info 1540178354Ssam */ 1541178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return); 1542178354Ssam ni = vap->iv_bss; 1543178354Ssam capinfo = le16toh(*(uint16_t *)frm); 1544178354Ssam frm += 2; 1545178354Ssam status = le16toh(*(uint16_t *)frm); 1546178354Ssam frm += 2; 1547178354Ssam if (status != 0) { 1548178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1549178354Ssam wh->i_addr2, "%sassoc failed (reason %d)", 1550178354Ssam ISREASSOC(subtype) ? "re" : "", status); 1551178354Ssam vap->iv_stats.is_rx_auth_fail++; /* XXX */ 1552178354Ssam return; 1553178354Ssam } 1554178354Ssam associd = le16toh(*(uint16_t *)frm); 1555178354Ssam frm += 2; 1556178354Ssam 1557178354Ssam rates = xrates = wme = htcap = htinfo = NULL; 1558178354Ssam while (efrm - frm > 1) { 1559178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return); 1560178354Ssam switch (*frm) { 1561178354Ssam case IEEE80211_ELEMID_RATES: 1562178354Ssam rates = frm; 1563178354Ssam break; 1564178354Ssam case IEEE80211_ELEMID_XRATES: 1565178354Ssam xrates = frm; 1566178354Ssam break; 1567178354Ssam case IEEE80211_ELEMID_HTCAP: 1568178354Ssam htcap = frm; 1569178354Ssam break; 1570178354Ssam case IEEE80211_ELEMID_HTINFO: 1571178354Ssam htinfo = frm; 1572178354Ssam break; 1573178354Ssam case IEEE80211_ELEMID_VENDOR: 1574178354Ssam if (iswmeoui(frm)) 1575178354Ssam wme = frm; 1576193655Ssam else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) { 1577178354Ssam /* 1578178354Ssam * Accept pre-draft HT ie's if the 1579178354Ssam * standard ones have not been seen. 1580178354Ssam */ 1581178354Ssam if (ishtcapoui(frm)) { 1582178354Ssam if (htcap == NULL) 1583178354Ssam htcap = frm; 1584178354Ssam } else if (ishtinfooui(frm)) { 1585178354Ssam if (htinfo == NULL) 1586219603Sbschmidt htinfo = frm; 1587178354Ssam } 1588178354Ssam } 1589178354Ssam /* XXX Atheros OUI support */ 1590178354Ssam break; 1591178354Ssam } 1592178354Ssam frm += frm[1] + 2; 1593178354Ssam } 1594178354Ssam 1595178354Ssam IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return); 1596178354Ssam if (xrates != NULL) 1597178354Ssam IEEE80211_VERIFY_ELEMENT(xrates, 1598178354Ssam IEEE80211_RATE_MAXSIZE - rates[1], return); 1599178354Ssam rate = ieee80211_setup_rates(ni, rates, xrates, 1600178354Ssam IEEE80211_F_JOIN | 1601178354Ssam IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE | 1602178354Ssam IEEE80211_F_DONEGO | IEEE80211_F_DODEL); 1603178354Ssam if (rate & IEEE80211_RATE_BASIC) { 1604178354Ssam IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC, 1605178354Ssam wh->i_addr2, 1606178354Ssam "%sassoc failed (rate set mismatch)", 1607178354Ssam ISREASSOC(subtype) ? "re" : ""); 1608178354Ssam vap->iv_stats.is_rx_assoc_norate++; 1609178354Ssam ieee80211_new_state(vap, IEEE80211_S_SCAN, 1610178354Ssam IEEE80211_SCAN_FAIL_STATUS); 1611178354Ssam return; 1612178354Ssam } 1613178354Ssam 1614178354Ssam ni->ni_capinfo = capinfo; 1615178354Ssam ni->ni_associd = associd; 1616178354Ssam if (ni->ni_jointime == 0) 1617178354Ssam ni->ni_jointime = time_uptime; 1618178354Ssam if (wme != NULL && 1619178354Ssam ieee80211_parse_wmeparams(vap, wme, wh) >= 0) { 1620178354Ssam ni->ni_flags |= IEEE80211_NODE_QOS; 1621178354Ssam ieee80211_wme_updateparams(vap); 1622178354Ssam } else 1623178354Ssam ni->ni_flags &= ~IEEE80211_NODE_QOS; 1624178354Ssam /* 1625178354Ssam * Setup HT state according to the negotiation. 1626178354Ssam * 1627178354Ssam * NB: shouldn't need to check if HT use is enabled but some 1628178354Ssam * ap's send back HT ie's even when we don't indicate we 1629178354Ssam * are HT capable in our AssocReq. 1630178354Ssam */ 1631178354Ssam if (htcap != NULL && htinfo != NULL && 1632193655Ssam (vap->iv_flags_ht & IEEE80211_FHT_HT)) { 1633183254Ssam ieee80211_ht_node_init(ni); 1634183254Ssam ieee80211_ht_updateparams(ni, htcap, htinfo); 1635178354Ssam ieee80211_setup_htrates(ni, htcap, 1636178354Ssam IEEE80211_F_JOIN | IEEE80211_F_DOBRS); 1637178354Ssam ieee80211_setup_basic_htrates(ni, htinfo); 1638193966Ssam ieee80211_node_setuptxparms(ni); 1639214894Sbschmidt ieee80211_ratectl_node_init(ni); 1640190579Ssam } else { 1641190579Ssam#ifdef IEEE80211_SUPPORT_SUPERG 1642190579Ssam if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_ATH)) 1643190579Ssam ieee80211_ff_node_init(ni); 1644190579Ssam#endif 1645178354Ssam } 1646178354Ssam /* 1647178354Ssam * Configure state now that we are associated. 1648178354Ssam * 1649178354Ssam * XXX may need different/additional driver callbacks? 1650178354Ssam */ 1651178354Ssam if (IEEE80211_IS_CHAN_A(ic->ic_curchan) || 1652178354Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) { 1653178354Ssam ic->ic_flags |= IEEE80211_F_SHPREAMBLE; 1654178354Ssam ic->ic_flags &= ~IEEE80211_F_USEBARKER; 1655178354Ssam } else { 1656178354Ssam ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE; 1657178354Ssam ic->ic_flags |= IEEE80211_F_USEBARKER; 1658178354Ssam } 1659178354Ssam ieee80211_set_shortslottime(ic, 1660178354Ssam IEEE80211_IS_CHAN_A(ic->ic_curchan) || 1661178354Ssam (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME)); 1662178354Ssam /* 1663178354Ssam * Honor ERP protection. 1664178354Ssam * 1665178354Ssam * NB: ni_erp should zero for non-11g operation. 1666178354Ssam */ 1667178354Ssam if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) && 1668178354Ssam (ni->ni_erp & IEEE80211_ERP_USE_PROTECTION)) 1669178354Ssam ic->ic_flags |= IEEE80211_F_USEPROT; 1670178354Ssam else 1671178354Ssam ic->ic_flags &= ~IEEE80211_F_USEPROT; 1672178354Ssam IEEE80211_NOTE_MAC(vap, 1673178354Ssam IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, wh->i_addr2, 1674183256Ssam "%sassoc success at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s", 1675178354Ssam ISREASSOC(subtype) ? "re" : "", 1676178354Ssam IEEE80211_NODE_AID(ni), 1677178354Ssam ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long", 1678178354Ssam ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long", 1679178354Ssam ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "", 1680178354Ssam ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "", 1681178354Ssam ni->ni_flags & IEEE80211_NODE_HT ? 1682182834Ssam (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "", 1683178354Ssam ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "", 1684183255Ssam ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" : 1685183255Ssam ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "", 1686183256Ssam ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "", 1687178354Ssam IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ? 1688178354Ssam ", fast-frames" : "", 1689178354Ssam IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ? 1690178354Ssam ", turbo" : "" 1691178354Ssam ); 1692178354Ssam ieee80211_new_state(vap, IEEE80211_S_RUN, subtype); 1693178354Ssam break; 1694178354Ssam } 1695178354Ssam 1696178354Ssam case IEEE80211_FC0_SUBTYPE_DEAUTH: { 1697178354Ssam uint16_t reason; 1698178354Ssam 1699178354Ssam if (vap->iv_state == IEEE80211_S_SCAN) { 1700178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1701178354Ssam return; 1702178354Ssam } 1703178354Ssam if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { 1704178354Ssam /* NB: can happen when in promiscuous mode */ 1705178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1706178354Ssam break; 1707178354Ssam } 1708178354Ssam 1709178354Ssam /* 1710178354Ssam * deauth frame format 1711178354Ssam * [2] reason 1712178354Ssam */ 1713178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); 1714178354Ssam reason = le16toh(*(uint16_t *)frm); 1715178354Ssam 1716178354Ssam vap->iv_stats.is_rx_deauth++; 1717178354Ssam vap->iv_stats.is_rx_deauth_code = reason; 1718178354Ssam IEEE80211_NODE_STAT(ni, rx_deauth); 1719178354Ssam 1720178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni, 1721178354Ssam "recv deauthenticate (reason %d)", reason); 1722178354Ssam ieee80211_new_state(vap, IEEE80211_S_AUTH, 1723178354Ssam (reason << 8) | IEEE80211_FC0_SUBTYPE_DEAUTH); 1724178354Ssam break; 1725178354Ssam } 1726178354Ssam 1727178354Ssam case IEEE80211_FC0_SUBTYPE_DISASSOC: { 1728178354Ssam uint16_t reason; 1729178354Ssam 1730178354Ssam if (vap->iv_state != IEEE80211_S_RUN && 1731178354Ssam vap->iv_state != IEEE80211_S_ASSOC && 1732178354Ssam vap->iv_state != IEEE80211_S_AUTH) { 1733178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1734178354Ssam return; 1735178354Ssam } 1736178354Ssam if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) { 1737178354Ssam /* NB: can happen when in promiscuous mode */ 1738178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1739178354Ssam break; 1740178354Ssam } 1741178354Ssam 1742178354Ssam /* 1743178354Ssam * disassoc frame format 1744178354Ssam * [2] reason 1745178354Ssam */ 1746178354Ssam IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return); 1747178354Ssam reason = le16toh(*(uint16_t *)frm); 1748178354Ssam 1749178354Ssam vap->iv_stats.is_rx_disassoc++; 1750178354Ssam vap->iv_stats.is_rx_disassoc_code = reason; 1751178354Ssam IEEE80211_NODE_STAT(ni, rx_disassoc); 1752178354Ssam 1753178354Ssam IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni, 1754178354Ssam "recv disassociate (reason %d)", reason); 1755178354Ssam ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0); 1756178354Ssam break; 1757178354Ssam } 1758178354Ssam 1759178354Ssam case IEEE80211_FC0_SUBTYPE_ACTION: 1760218927Sbschmidt case IEEE80211_FC0_SUBTYPE_ACTION_NOACK: 1761218958Sbschmidt if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) && 1762218958Sbschmidt !IEEE80211_IS_MULTICAST(wh->i_addr1)) { 1763218927Sbschmidt IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1764218958Sbschmidt wh, NULL, "%s", "not for us"); 1765218958Sbschmidt vap->iv_stats.is_rx_mgtdiscard++; 1766218958Sbschmidt } else if (vap->iv_state != IEEE80211_S_RUN) { 1767218958Sbschmidt IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1768218927Sbschmidt wh, NULL, "wrong state %s", 1769218927Sbschmidt ieee80211_state_name[vap->iv_state]); 1770178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1771218958Sbschmidt } else { 1772218958Sbschmidt if (ieee80211_parse_action(ni, m0) == 0) 1773218958Sbschmidt (void)ic->ic_recv_action(ni, wh, frm, efrm); 1774218927Sbschmidt } 1775178354Ssam break; 1776178354Ssam 1777178354Ssam case IEEE80211_FC0_SUBTYPE_ASSOC_REQ: 1778178354Ssam case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: 1779218927Sbschmidt case IEEE80211_FC0_SUBTYPE_PROBE_REQ: 1780218927Sbschmidt case IEEE80211_FC0_SUBTYPE_ATIM: 1781218927Sbschmidt IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, 1782218927Sbschmidt wh, NULL, "%s", "not handled"); 1783178354Ssam vap->iv_stats.is_rx_mgtdiscard++; 1784218927Sbschmidt break; 1785218927Sbschmidt 1786178354Ssam default: 1787178354Ssam IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY, 1788218927Sbschmidt wh, "mgt", "subtype 0x%x not handled", subtype); 1789178354Ssam vap->iv_stats.is_rx_badsubtype++; 1790178354Ssam break; 1791178354Ssam } 1792178354Ssam#undef ISREASSOC 1793178354Ssam#undef ISPROBE 1794178354Ssam} 1795191546Ssam 1796191546Ssamstatic void 1797205277Srpaulosta_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype) 1798191546Ssam{ 1799205277Srpaulo switch (subtype) { 1800205277Srpaulo case IEEE80211_FC0_SUBTYPE_BAR: 1801205277Srpaulo ieee80211_recv_bar(ni, m); 1802205277Srpaulo break; 1803205277Srpaulo } 1804191546Ssam} 1805