sys/net80211/ieee80211_sta.c

   1 /*-
   2  * Copyright (c) 2007-2008 Sam Leffler, Errno Consulting
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  15  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  16  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  17  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  18  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  19  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  20  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  21  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #include <sys/cdefs.h>
  27 #ifdef __FreeBSD__
  28 __FBSDID("$FreeBSD$");
  29 #endif
  30
  31 /*
  32  * IEEE 802.11 Station mode support.
  33  */
  34 #include "opt_inet.h"
  35 #include "opt_wlan.h"
  36
  37 #include <sys/param.h>
  38 #include <sys/systm.h>
  39 #include <sys/mbuf.h>
  40 #include <sys/malloc.h>
  41 #include <sys/kernel.h>
  42
  43 #include <sys/socket.h>
  44 #include <sys/sockio.h>
  45 #include <sys/endian.h>
  46 #include <sys/errno.h>
  47 #include <sys/proc.h>
  48 #include <sys/sysctl.h>
  49
  50 #include <net/if.h>
  51 #include <net/if_media.h>
  52 #include <net/if_llc.h>
  53 #include <net/ethernet.h>
  54
  55 #include <net/bpf.h>
  56
  57 #include <net80211/ieee80211_var.h>
  58 #include <net80211/ieee80211_sta.h>
  59 #include <net80211/ieee80211_input.h>
  60 #ifdef IEEE80211_SUPPORT_SUPERG
  61 #include <net80211/ieee80211_superg.h>
  62 #endif
  63
  64 #define IEEE80211_RATE2MBS(r)   (((r) & IEEE80211_RATE_VAL) / 2)
  65
  66 static  void sta_vattach(struct ieee80211vap *);
  67 static  void sta_beacon_miss(struct ieee80211vap *);
  68 static  int sta_newstate(struct ieee80211vap *, enum ieee80211_state, int);
  69 static  int sta_input(struct ieee80211_node *, struct mbuf *, int, int);
  70 static void sta_recv_mgmt(struct ieee80211_node *, struct mbuf *,
  71             int subtype, int rssi, int nf);
  72 static void sta_recv_ctl(struct ieee80211_node *, struct mbuf *, int subtype);
  73
  74 void
  75 ieee80211_sta_attach(struct ieee80211com *ic)
  76 {
  77         ic->ic_vattach[IEEE80211_M_STA] = sta_vattach;
  78 }
  79
  80 void
  81 ieee80211_sta_detach(struct ieee80211com *ic)
  82 {
  83 }
  84
  85 static void
  86 sta_vdetach(struct ieee80211vap *vap)
  87 {
  88 }
  89
  90 static void
  91 sta_vattach(struct ieee80211vap *vap)
  92 {
  93         vap->iv_newstate = sta_newstate;
  94         vap->iv_input = sta_input;
  95         vap->iv_recv_mgmt = sta_recv_mgmt;
  96         vap->iv_recv_ctl = sta_recv_ctl;
  97         vap->iv_opdetach = sta_vdetach;
  98         vap->iv_bmiss = sta_beacon_miss;
  99 }
 100
 101 /*
 102  * Handle a beacon miss event.  The common code filters out
 103  * spurious events that can happen when scanning and/or before
 104  * reaching RUN state.
 105  */
 106 static void
 107 sta_beacon_miss(struct ieee80211vap *vap)
 108 {
 109         struct ieee80211com *ic = vap->iv_ic;
 110
 111         KASSERT((ic->ic_flags & IEEE80211_F_SCAN) == 0, ("scanning"));
 112         KASSERT(vap->iv_state >= IEEE80211_S_RUN,
 113             ("wrong state %s", ieee80211_state_name[vap->iv_state]));
 114
 115         IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE | IEEE80211_MSG_DEBUG,
 116             "beacon miss, mode %s state %s\n",
 117             ieee80211_opmode_name[vap->iv_opmode],
 118             ieee80211_state_name[vap->iv_state]);
 119
 120         if (vap->iv_state == IEEE80211_S_CSA) {
 121                 /*
 122                  * A Channel Switch is pending; assume we missed the
 123                  * beacon that would've completed the process and just
 124                  * force the switch.  If we made a mistake we'll not
 125                  * find the AP on the new channel and fall back to a
 126                  * normal scan.
 127                  */
 128                 ieee80211_csa_completeswitch(ic);
 129                 return;
 130         }
 131         if (++vap->iv_bmiss_count < vap->iv_bmiss_max) {
 132                 /*
 133                  * Send a directed probe req before falling back to a
 134                  * scan; if we receive a response ic_bmiss_count will
 135                  * be reset.  Some cards mistakenly report beacon miss
 136                  * so this avoids the expensive scan if the ap is
 137                  * still there.
 138                  */
 139                 ieee80211_send_probereq(vap->iv_bss, vap->iv_myaddr,
 140                         vap->iv_bss->ni_bssid, vap->iv_bss->ni_bssid,
 141                         vap->iv_bss->ni_essid, vap->iv_bss->ni_esslen);
 142                 return;
 143         }
 144
 145         callout_stop(&vap->iv_swbmiss);
 146         vap->iv_bmiss_count = 0;
 147         vap->iv_stats.is_beacon_miss++;
 148         if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) {
 149 #ifdef IEEE80211_SUPPORT_SUPERG
 150                 struct ieee80211com *ic = vap->iv_ic;
 151
 152                 /*
 153                  * If we receive a beacon miss interrupt when using
 154                  * dynamic turbo, attempt to switch modes before
 155                  * reassociating.
 156                  */
 157                 if (IEEE80211_ATH_CAP(vap, vap->iv_bss, IEEE80211_NODE_TURBOP))
 158                         ieee80211_dturbo_switch(vap,
 159                             ic->ic_bsschan->ic_flags ^ IEEE80211_CHAN_TURBO);
 160 #endif
 161                 /*
 162                  * Try to reassociate before scanning for a new ap.
 163                  */
 164                 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 1);
 165         } else {
 166                 /*
 167                  * Somebody else is controlling state changes (e.g.
 168                  * a user-mode app) don't do anything that would
 169                  * confuse them; just drop into scan mode so they'll
 170                  * notified of the state change and given control.
 171                  */
 172                 ieee80211_new_state(vap, IEEE80211_S_SCAN, 0);
 173         }
 174 }
 175
 176 /*
 177  * Handle deauth with reason.  We retry only for
 178  * the cases where we might succeed.  Otherwise
 179  * we downgrade the ap and scan.
 180  */
 181 static void
 182 sta_authretry(struct ieee80211vap *vap, struct ieee80211_node *ni, int reason)
 183 {
 184         switch (reason) {
 185         case IEEE80211_STATUS_SUCCESS:          /* NB: MLME assoc */
 186         case IEEE80211_STATUS_TIMEOUT:
 187         case IEEE80211_REASON_ASSOC_EXPIRE:
 188         case IEEE80211_REASON_NOT_AUTHED:
 189         case IEEE80211_REASON_NOT_ASSOCED:
 190         case IEEE80211_REASON_ASSOC_LEAVE:
 191         case IEEE80211_REASON_ASSOC_NOT_AUTHED:
 192                 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, 1);
 193                 break;
 194         default:
 195                 ieee80211_scan_assoc_fail(vap, vap->iv_bss->ni_macaddr, reason);
 196                 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO)
 197                         ieee80211_check_scan_current(vap);
 198                 break;
 199         }
 200 }
 201
 202 /*
 203  * IEEE80211_M_STA vap state machine handler.
 204  * This routine handles the main states in the 802.11 protocol.
 205  */
 206 static int
 207 sta_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
 208 {
 209         struct ieee80211com *ic = vap->iv_ic;
 210         struct ieee80211_node *ni;
 211         enum ieee80211_state ostate;
 212
 213         IEEE80211_LOCK_ASSERT(ic);
 214
 215         ostate = vap->iv_state;
 216         IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
 217             __func__, ieee80211_state_name[ostate],
 218             ieee80211_state_name[nstate], arg);
 219         vap->iv_state = nstate;                 /* state transition */
 220         callout_stop(&vap->iv_mgtsend);         /* XXX callout_drain */
 221         if (ostate != IEEE80211_S_SCAN)
 222                 ieee80211_cancel_scan(vap);     /* background scan */
 223         ni = vap->iv_bss;                       /* NB: no reference held */
 224         if (vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS)
 225                 callout_stop(&vap->iv_swbmiss);
 226         switch (nstate) {
 227         case IEEE80211_S_INIT:
 228                 switch (ostate) {
 229                 case IEEE80211_S_SLEEP:
 230                         /* XXX wakeup */
 231                 case IEEE80211_S_RUN:
 232                         IEEE80211_SEND_MGMT(ni,
 233                             IEEE80211_FC0_SUBTYPE_DISASSOC,
 234                             IEEE80211_REASON_ASSOC_LEAVE);
 235                         ieee80211_sta_leave(ni);
 236                         break;
 237                 case IEEE80211_S_ASSOC:
 238                         IEEE80211_SEND_MGMT(ni,
 239                             IEEE80211_FC0_SUBTYPE_DEAUTH,
 240                             IEEE80211_REASON_AUTH_LEAVE);
 241                         break;
 242                 case IEEE80211_S_SCAN:
 243                         ieee80211_cancel_scan(vap);
 244                         break;
 245                 default:
 246                         goto invalid;
 247                 }
 248                 if (ostate != IEEE80211_S_INIT) {
 249                         /* NB: optimize INIT -> INIT case */
 250                         ieee80211_reset_bss(vap);
 251                 }
 252                 if (vap->iv_auth->ia_detach != NULL)
 253                         vap->iv_auth->ia_detach(vap);
 254                 break;
 255         case IEEE80211_S_SCAN:
 256                 switch (ostate) {
 257                 case IEEE80211_S_INIT:
 258                         /*
 259                          * Initiate a scan.  We can come here as a result
 260                          * of an IEEE80211_IOC_SCAN_REQ too in which case
 261                          * the vap will be marked with IEEE80211_FEXT_SCANREQ
 262                          * and the scan request parameters will be present
 263                          * in iv_scanreq.  Otherwise we do the default.
 264                          */
 265                         if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
 266                                 ieee80211_check_scan(vap,
 267                                     vap->iv_scanreq_flags,
 268                                     vap->iv_scanreq_duration,
 269                                     vap->iv_scanreq_mindwell,
 270                                     vap->iv_scanreq_maxdwell,
 271                                     vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
 272                                 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
 273                         } else
 274                                 ieee80211_check_scan_current(vap);
 275                         break;
 276                 case IEEE80211_S_SCAN:
 277                 case IEEE80211_S_AUTH:
 278                 case IEEE80211_S_ASSOC:
 279                         /*
 280                          * These can happen either because of a timeout
 281                          * on an assoc/auth response or because of a
 282                          * change in state that requires a reset.  For
 283                          * the former we're called with a non-zero arg
 284                          * that is the cause for the failure; pass this
 285                          * to the scan code so it can update state.
 286                          * Otherwise trigger a new scan unless we're in
 287                          * manual roaming mode in which case an application
 288                          * must issue an explicit scan request.
 289                          */
 290                         if (arg != 0)
 291                                 ieee80211_scan_assoc_fail(vap,
 292                                         vap->iv_bss->ni_macaddr, arg);
 293                         if (vap->iv_roaming == IEEE80211_ROAMING_AUTO)
 294                                 ieee80211_check_scan_current(vap);
 295                         break;
 296                 case IEEE80211_S_RUN:           /* beacon miss */
 297                         /*
 298                          * Beacon miss.  Notify user space and if not
 299                          * under control of a user application (roaming
 300                          * manual) kick off a scan to re-connect.
 301                          */
 302                         ieee80211_sta_leave(ni);
 303                         if (vap->iv_roaming == IEEE80211_ROAMING_AUTO)
 304                                 ieee80211_check_scan_current(vap);
 305                         break;
 306                 default:
 307                         goto invalid;
 308                 }
 309                 break;
 310         case IEEE80211_S_AUTH:
 311                 switch (ostate) {
 312                 case IEEE80211_S_INIT:
 313                 case IEEE80211_S_SCAN:
 314                         IEEE80211_SEND_MGMT(ni,
 315                             IEEE80211_FC0_SUBTYPE_AUTH, 1);
 316                         break;
 317                 case IEEE80211_S_AUTH:
 318                 case IEEE80211_S_ASSOC:
 319                         switch (arg & 0xff) {
 320                         case IEEE80211_FC0_SUBTYPE_AUTH:
 321                                 /* ??? */
 322                                 IEEE80211_SEND_MGMT(ni,
 323                                     IEEE80211_FC0_SUBTYPE_AUTH, 2);
 324                                 break;
 325                         case IEEE80211_FC0_SUBTYPE_DEAUTH:
 326                                 sta_authretry(vap, ni, arg>>8);
 327                                 break;
 328                         }
 329                         break;
 330                 case IEEE80211_S_RUN:
 331                         switch (arg & 0xff) {
 332                         case IEEE80211_FC0_SUBTYPE_AUTH:
 333                                 IEEE80211_SEND_MGMT(ni,
 334                                     IEEE80211_FC0_SUBTYPE_AUTH, 2);
 335                                 vap->iv_state = ostate; /* stay RUN */
 336                                 break;
 337                         case IEEE80211_FC0_SUBTYPE_DEAUTH:
 338                                 ieee80211_sta_leave(ni);
 339                                 if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) {
 340                                         /* try to reauth */
 341                                         IEEE80211_SEND_MGMT(ni,
 342                                             IEEE80211_FC0_SUBTYPE_AUTH, 1);
 343                                 }
 344                                 break;
 345                         }
 346                         break;
 347                 default:
 348                         goto invalid;
 349                 }
 350                 break;
 351         case IEEE80211_S_ASSOC:
 352                 switch (ostate) {
 353                 case IEEE80211_S_AUTH:
 354                 case IEEE80211_S_ASSOC:
 355                         IEEE80211_SEND_MGMT(ni,
 356                             IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0);
 357                         break;
 358                 case IEEE80211_S_SLEEP:         /* cannot happen */
 359                 case IEEE80211_S_RUN:
 360                         ieee80211_sta_leave(ni);
 361                         if (vap->iv_roaming == IEEE80211_ROAMING_AUTO) {
 362                                 IEEE80211_SEND_MGMT(ni, arg ?
 363                                     IEEE80211_FC0_SUBTYPE_REASSOC_REQ :
 364                                     IEEE80211_FC0_SUBTYPE_ASSOC_REQ, 0);
 365                         }
 366                         break;
 367                 default:
 368                         goto invalid;
 369                 }
 370                 break;
 371         case IEEE80211_S_RUN:
 372                 if (vap->iv_flags & IEEE80211_F_WPA) {
 373                         /* XXX validate prerequisites */
 374                 }
 375                 switch (ostate) {
 376                 case IEEE80211_S_RUN:
 377                 case IEEE80211_S_CSA:
 378                         break;
 379                 case IEEE80211_S_AUTH:          /* when join is done in fw */
 380                 case IEEE80211_S_ASSOC:
 381 #ifdef IEEE80211_DEBUG
 382                         if (ieee80211_msg_debug(vap)) {
 383                                 ieee80211_note(vap, "%s with %s ssid ",
 384                                     (vap->iv_opmode == IEEE80211_M_STA ?
 385                                     "associated" : "synchronized"),
 386                                     ether_sprintf(ni->ni_bssid));
 387                                 ieee80211_print_essid(vap->iv_bss->ni_essid,
 388                                     ni->ni_esslen);
 389                                 /* XXX MCS/HT */
 390                                 printf(" channel %d start %uMb\n",
 391                                     ieee80211_chan2ieee(ic, ic->ic_curchan),
 392                                     IEEE80211_RATE2MBS(ni->ni_txrate));
 393                         }
 394 #endif
 395                         ieee80211_scan_assoc_success(vap, ni->ni_macaddr);
 396                         ieee80211_notify_node_join(ni,
 397                             arg == IEEE80211_FC0_SUBTYPE_ASSOC_RESP);
 398                         break;
 399                 case IEEE80211_S_SLEEP:
 400                         ieee80211_sta_pwrsave(vap, 0);
 401                         break;
 402                 default:
 403                         goto invalid;
 404                 }
 405                 ieee80211_sync_curchan(ic);
 406                 if (ostate != IEEE80211_S_RUN &&
 407                     (vap->iv_flags_ext & IEEE80211_FEXT_SWBMISS)) {
 408                         /*
 409                          * Start s/w beacon miss timer for devices w/o
 410                          * hardware support.  We fudge a bit here since
 411                          * we're doing this in software.
 412                          */
 413                         vap->iv_swbmiss_period = IEEE80211_TU_TO_TICKS(
 414                                 2 * vap->iv_bmissthreshold * ni->ni_intval);
 415                         vap->iv_swbmiss_count = 0;
 416                         callout_reset(&vap->iv_swbmiss, vap->iv_swbmiss_period,
 417                                 ieee80211_swbmiss, vap);
 418                 }
 419                 /*
 420                  * When 802.1x is not in use mark the port authorized
 421                  * at this point so traffic can flow.
 422                  */
 423                 if (ni->ni_authmode != IEEE80211_AUTH_8021X)
 424                         ieee80211_node_authorize(ni);
 425                 /*
 426                  * Fake association when joining an existing bss.
 427                  */
 428                 if (ic->ic_newassoc != NULL)
 429                         ic->ic_newassoc(vap->iv_bss, ostate != IEEE80211_S_RUN);
 430                 break;
 431         case IEEE80211_S_CSA:
 432                 if (ostate != IEEE80211_S_RUN)
 433                         goto invalid;
 434                 break;
 435         case IEEE80211_S_SLEEP:
 436                 ieee80211_sta_pwrsave(vap, 0);
 437                 break;
 438         default:
 439         invalid:
 440                 IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE,
 441                     "%s: unexpected state transition %s -> %s\n", __func__,
 442                     ieee80211_state_name[ostate], ieee80211_state_name[nstate]);
 443                 break;
 444         }
 445         return 0;
 446 }
 447
 448 /*
 449  * Return non-zero if the frame is an echo of a multicast
 450  * frame sent by ourself.  The dir is known to be DSTODS.
 451  */
 452 static __inline int
 453 isdstods_mcastecho(struct ieee80211vap *vap, const struct ieee80211_frame *wh)
 454 {
 455 #define QWH4(wh)        ((const struct ieee80211_qosframe_addr4 *)wh)
 456 #define WH4(wh)         ((const struct ieee80211_frame_addr4 *)wh)
 457         const uint8_t *sa;
 458
 459         KASSERT(vap->iv_opmode == IEEE80211_M_STA, ("wrong mode"));
 460
 461         if (!IEEE80211_IS_MULTICAST(wh->i_addr3))
 462                 return 0;
 463         sa = IEEE80211_QOS_HAS_SEQ(wh) ? QWH4(wh)->i_addr4 : WH4(wh)->i_addr4;
 464         return IEEE80211_ADDR_EQ(sa, vap->iv_myaddr);
 465 #undef WH4
 466 #undef QWH4
 467 }
 468
 469 /*
 470  * Return non-zero if the frame is an echo of a multicast
 471  * frame sent by ourself.  The dir is known to be FROMDS.
 472  */
 473 static __inline int
 474 isfromds_mcastecho(struct ieee80211vap *vap, const struct ieee80211_frame *wh)
 475 {
 476         KASSERT(vap->iv_opmode == IEEE80211_M_STA, ("wrong mode"));
 477
 478         if (!IEEE80211_IS_MULTICAST(wh->i_addr1))
 479                 return 0;
 480         return IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_myaddr);
 481 }
 482
 483 /*
 484  * Decide if a received management frame should be
 485  * printed when debugging is enabled.  This filters some
 486  * of the less interesting frames that come frequently
 487  * (e.g. beacons).
 488  */
 489 static __inline int
 490 doprint(struct ieee80211vap *vap, int subtype)
 491 {
 492         switch (subtype) {
 493         case IEEE80211_FC0_SUBTYPE_BEACON:
 494                 return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN);
 495         case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
 496                 return 0;
 497         }
 498         return 1;
 499 }
 500
 501 /*
 502  * Process a received frame.  The node associated with the sender
 503  * should be supplied.  If nothing was found in the node table then
 504  * the caller is assumed to supply a reference to iv_bss instead.
 505  * The RSSI and a timestamp are also supplied.  The RSSI data is used
 506  * during AP scanning to select a AP to associate with; it can have
 507  * any units so long as values have consistent units and higher values
 508  * mean ``better signal''.  The receive timestamp is currently not used
 509  * by the 802.11 layer.
 510  */
 511 static int
 512 sta_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf)
 513 {
 514 #define SEQ_LEQ(a,b)    ((int)((a)-(b)) <= 0)
 515 #define HAS_SEQ(type)   ((type & 0x4) == 0)
 516         struct ieee80211vap *vap = ni->ni_vap;
 517         struct ieee80211com *ic = ni->ni_ic;
 518         struct ifnet *ifp = vap->iv_ifp;
 519         struct ieee80211_frame *wh;
 520         struct ieee80211_key *key;
 521         struct ether_header *eh;
 522         int hdrspace, need_tap;
 523         uint8_t dir, type, subtype, qos;
 524         uint8_t *bssid;
 525         uint16_t rxseq;
 526
 527         if (m->m_flags & M_AMPDU_MPDU) {
 528                 /*
 529                  * Fastpath for A-MPDU reorder q resubmission.  Frames
 530                  * w/ M_AMPDU_MPDU marked have already passed through
 531                  * here but were received out of order and been held on
 532                  * the reorder queue.  When resubmitted they are marked
 533                  * with the M_AMPDU_MPDU flag and we can bypass most of
 534                  * the normal processing.
 535                  */
 536                 wh = mtod(m, struct ieee80211_frame *);
 537                 type = IEEE80211_FC0_TYPE_DATA;
 538                 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
 539                 subtype = IEEE80211_FC0_SUBTYPE_QOS;
 540                 hdrspace = ieee80211_hdrspace(ic, wh);  /* XXX optimize? */
 541                 goto resubmit_ampdu;
 542         }
 543
 544         KASSERT(ni != NULL, ("null node"));
 545         ni->ni_inact = ni->ni_inact_reload;
 546
 547         need_tap = 1;                   /* mbuf need to be tapped. */
 548         type = -1;                      /* undefined */
 549
 550         if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
 551                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 552                     ni->ni_macaddr, NULL,
 553                     "too short (1): len %u", m->m_pkthdr.len);
 554                 vap->iv_stats.is_rx_tooshort++;
 555                 goto out;
 556         }
 557         /*
 558          * Bit of a cheat here, we use a pointer for a 3-address
 559          * frame format but don't reference fields past outside
 560          * ieee80211_frame_min w/o first validating the data is
 561          * present.
 562          */
 563         wh = mtod(m, struct ieee80211_frame *);
 564
 565         if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
 566             IEEE80211_FC0_VERSION_0) {
 567                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 568                     ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x",
 569                     wh->i_fc[0], wh->i_fc[1]);
 570                 vap->iv_stats.is_rx_badversion++;
 571                 goto err;
 572         }
 573
 574         dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
 575         type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
 576         subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
 577         if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
 578                 bssid = wh->i_addr2;
 579                 if (!IEEE80211_ADDR_EQ(bssid, ni->ni_bssid)) {
 580                         /* not interested in */
 581                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
 582                             bssid, NULL, "%s", "not to bss");
 583                         vap->iv_stats.is_rx_wrongbss++;
 584                         goto out;
 585                 }
 586                 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
 587                 ni->ni_noise = nf;
 588                 if (HAS_SEQ(type)) {
 589                         uint8_t tid = ieee80211_gettid(wh);
 590                         if (IEEE80211_QOS_HAS_SEQ(wh) &&
 591                             TID_TO_WME_AC(tid) >= WME_AC_VI)
 592                                 ic->ic_wme.wme_hipri_traffic++;
 593                         rxseq = le16toh(*(uint16_t *)wh->i_seq);
 594                         if ((ni->ni_flags & IEEE80211_NODE_HT) == 0 &&
 595                             (wh->i_fc[1] & IEEE80211_FC1_RETRY) &&
 596                             SEQ_LEQ(rxseq, ni->ni_rxseqs[tid])) {
 597                                 /* duplicate, discard */
 598                                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
 599                                     bssid, "duplicate",
 600                                     "seqno <%u,%u> fragno <%u,%u> tid %u",
 601                                     rxseq >> IEEE80211_SEQ_SEQ_SHIFT,
 602                                     ni->ni_rxseqs[tid] >>
 603                                         IEEE80211_SEQ_SEQ_SHIFT,
 604                                     rxseq & IEEE80211_SEQ_FRAG_MASK,
 605                                     ni->ni_rxseqs[tid] &
 606                                         IEEE80211_SEQ_FRAG_MASK,
 607                                     tid);
 608                                 vap->iv_stats.is_rx_dup++;
 609                                 IEEE80211_NODE_STAT(ni, rx_dup);
 610                                 goto out;
 611                         }
 612                         ni->ni_rxseqs[tid] = rxseq;
 613                 }
 614         }
 615
 616         switch (type) {
 617         case IEEE80211_FC0_TYPE_DATA:
 618                 hdrspace = ieee80211_hdrspace(ic, wh);
 619                 if (m->m_len < hdrspace &&
 620                     (m = m_pullup(m, hdrspace)) == NULL) {
 621                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 622                             ni->ni_macaddr, NULL,
 623                             "data too short: expecting %u", hdrspace);
 624                         vap->iv_stats.is_rx_tooshort++;
 625                         goto out;               /* XXX */
 626                 }
 627                 /*
 628                  * Handle A-MPDU re-ordering.  If the frame is to be
 629                  * processed directly then ieee80211_ampdu_reorder
 630                  * will return 0; otherwise it has consumed the mbuf
 631                  * and we should do nothing more with it.
 632                  */
 633                 if ((m->m_flags & M_AMPDU) &&
 634                     (dir == IEEE80211_FC1_DIR_FROMDS ||
 635                      dir == IEEE80211_FC1_DIR_DSTODS) &&
 636                     ieee80211_ampdu_reorder(ni, m) != 0) {
 637                         m = NULL;
 638                         goto out;
 639                 }
 640         resubmit_ampdu:
 641                 if (dir == IEEE80211_FC1_DIR_FROMDS) {
 642                         if ((ifp->if_flags & IFF_SIMPLEX) &&
 643                             isfromds_mcastecho(vap, wh)) {
 644                                 /*
 645                                  * In IEEE802.11 network, multicast
 646                                  * packets sent from "me" are broadcast
 647                                  * from the AP; silently discard for
 648                                  * SIMPLEX interface.
 649                                  */
 650                                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 651                                     wh, "data", "%s", "multicast echo");
 652                                 vap->iv_stats.is_rx_mcastecho++;
 653                                 goto out;
 654                         }
 655                         if ((vap->iv_flags & IEEE80211_F_DWDS) &&
 656                             IEEE80211_IS_MULTICAST(wh->i_addr1)) {
 657                                 /*
 658                                  * DWDS sta's must drop 3-address mcast frames
 659                                  * as they will be sent separately as a 4-addr
 660                                  * frame.  Accepting the 3-addr frame will
 661                                  * confuse the bridge into thinking the sending
 662                                  * sta is located at the end of WDS link.
 663                                  */
 664                                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh,
 665                                     "3-address data", "%s", "DWDS enabled");
 666                                 vap->iv_stats.is_rx_mcastecho++;
 667                                 goto out;
 668                         }
 669                 } else if (dir == IEEE80211_FC1_DIR_DSTODS) {
 670                         if ((vap->iv_flags & IEEE80211_F_DWDS) == 0) {
 671                                 IEEE80211_DISCARD(vap,
 672                                     IEEE80211_MSG_INPUT, wh, "4-address data",
 673                                     "%s", "DWDS not enabled");
 674                                 vap->iv_stats.is_rx_wrongdir++;
 675                                 goto out;
 676                         }
 677                         if ((ifp->if_flags & IFF_SIMPLEX) &&
 678                             isdstods_mcastecho(vap, wh)) {
 679                                 /*
 680                                  * In IEEE802.11 network, multicast
 681                                  * packets sent from "me" are broadcast
 682                                  * from the AP; silently discard for
 683                                  * SIMPLEX interface.
 684                                  */
 685                                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh,
 686                                     "4-address data", "%s", "multicast echo");
 687                                 vap->iv_stats.is_rx_mcastecho++;
 688                                 goto out;
 689                         }
 690                 } else {
 691                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT, wh,
 692                             "data", "incorrect dir 0x%x", dir);
 693                         vap->iv_stats.is_rx_wrongdir++;
 694                         goto out;
 695                 }
 696
 697                 /*
 698                  * Handle privacy requirements.  Note that we
 699                  * must not be preempted from here until after
 700                  * we (potentially) call ieee80211_crypto_demic;
 701                  * otherwise we may violate assumptions in the
 702                  * crypto cipher modules used to do delayed update
 703                  * of replay sequence numbers.
 704                  */
 705                 if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
 706                         if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
 707                                 /*
 708                                  * Discard encrypted frames when privacy is off.
 709                                  */
 710                                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 711                                     wh, "WEP", "%s", "PRIVACY off");
 712                                 vap->iv_stats.is_rx_noprivacy++;
 713                                 IEEE80211_NODE_STAT(ni, rx_noprivacy);
 714                                 goto out;
 715                         }
 716                         key = ieee80211_crypto_decap(ni, m, hdrspace);
 717                         if (key == NULL) {
 718                                 /* NB: stats+msgs handled in crypto_decap */
 719                                 IEEE80211_NODE_STAT(ni, rx_wepfail);
 720                                 goto out;
 721                         }
 722                         wh = mtod(m, struct ieee80211_frame *);
 723                         wh->i_fc[1] &= ~IEEE80211_FC1_WEP;
 724                 } else {
 725                         /* XXX M_WEP and IEEE80211_F_PRIVACY */
 726                         key = NULL;
 727                 }
 728
 729                 /*
 730                  * Save QoS bits for use below--before we strip the header.
 731                  */
 732                 if (subtype == IEEE80211_FC0_SUBTYPE_QOS) {
 733                         qos = (dir == IEEE80211_FC1_DIR_DSTODS) ?
 734                             ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] :
 735                             ((struct ieee80211_qosframe *)wh)->i_qos[0];
 736                 } else
 737                         qos = 0;
 738
 739                 /*
 740                  * Next up, any fragmentation.
 741                  */
 742                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
 743                         m = ieee80211_defrag(ni, m, hdrspace);
 744                         if (m == NULL) {
 745                                 /* Fragment dropped or frame not complete yet */
 746                                 goto out;
 747                         }
 748                 }
 749                 wh = NULL;              /* no longer valid, catch any uses */
 750
 751                 /*
 752                  * Next strip any MSDU crypto bits.
 753                  */
 754                 if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) {
 755                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
 756                             ni->ni_macaddr, "data", "%s", "demic error");
 757                         vap->iv_stats.is_rx_demicfail++;
 758                         IEEE80211_NODE_STAT(ni, rx_demicfail);
 759                         goto out;
 760                 }
 761
 762                 /* copy to listener after decrypt */
 763                 if (ieee80211_radiotap_active_vap(vap))
 764                         ieee80211_radiotap_rx(vap, m);
 765                 need_tap = 0;
 766
 767                 /*
 768                  * Finally, strip the 802.11 header.
 769                  */
 770                 m = ieee80211_decap(vap, m, hdrspace);
 771                 if (m == NULL) {
 772                         /* XXX mask bit to check for both */
 773                         /* don't count Null data frames as errors */
 774                         if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
 775                             subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
 776                                 goto out;
 777                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
 778                             ni->ni_macaddr, "data", "%s", "decap error");
 779                         vap->iv_stats.is_rx_decap++;
 780                         IEEE80211_NODE_STAT(ni, rx_decap);
 781                         goto err;
 782                 }
 783                 eh = mtod(m, struct ether_header *);
 784                 if (!ieee80211_node_is_authorized(ni)) {
 785                         /*
 786                          * Deny any non-PAE frames received prior to
 787                          * authorization.  For open/shared-key
 788                          * authentication the port is mark authorized
 789                          * after authentication completes.  For 802.1x
 790                          * the port is not marked authorized by the
 791                          * authenticator until the handshake has completed.
 792                          */
 793                         if (eh->ether_type != htons(ETHERTYPE_PAE)) {
 794                                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
 795                                     eh->ether_shost, "data",
 796                                     "unauthorized port: ether type 0x%x len %u",
 797                                     eh->ether_type, m->m_pkthdr.len);
 798                                 vap->iv_stats.is_rx_unauth++;
 799                                 IEEE80211_NODE_STAT(ni, rx_unauth);
 800                                 goto err;
 801                         }
 802                 } else {
 803                         /*
 804                          * When denying unencrypted frames, discard
 805                          * any non-PAE frames received without encryption.
 806                          */
 807                         if ((vap->iv_flags & IEEE80211_F_DROPUNENC) &&
 808                             (key == NULL && (m->m_flags & M_WEP) == 0) &&
 809                             eh->ether_type != htons(ETHERTYPE_PAE)) {
 810                                 /*
 811                                  * Drop unencrypted frames.
 812                                  */
 813                                 vap->iv_stats.is_rx_unencrypted++;
 814                                 IEEE80211_NODE_STAT(ni, rx_unencrypted);
 815                                 goto out;
 816                         }
 817                 }
 818                 /* XXX require HT? */
 819                 if (qos & IEEE80211_QOS_AMSDU) {
 820                         m = ieee80211_decap_amsdu(ni, m);
 821                         if (m == NULL)
 822                                 return IEEE80211_FC0_TYPE_DATA;
 823                 } else {
 824 #ifdef IEEE80211_SUPPORT_SUPERG
 825                         m = ieee80211_decap_fastframe(vap, ni, m);
 826                         if (m == NULL)
 827                                 return IEEE80211_FC0_TYPE_DATA;
 828 #endif
 829                 }
 830                 ieee80211_deliver_data(vap, ni, m);
 831                 return IEEE80211_FC0_TYPE_DATA;
 832
 833         case IEEE80211_FC0_TYPE_MGT:
 834                 vap->iv_stats.is_rx_mgmt++;
 835                 IEEE80211_NODE_STAT(ni, rx_mgmt);
 836                 if (dir != IEEE80211_FC1_DIR_NODS) {
 837                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 838                             wh, "data", "incorrect dir 0x%x", dir);
 839                         vap->iv_stats.is_rx_wrongdir++;
 840                         goto err;
 841                 }
 842                 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
 843                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 844                             ni->ni_macaddr, "mgt", "too short: len %u",
 845                             m->m_pkthdr.len);
 846                         vap->iv_stats.is_rx_tooshort++;
 847                         goto out;
 848                 }
 849 #ifdef IEEE80211_DEBUG
 850                 if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) ||
 851                     ieee80211_msg_dumppkts(vap)) {
 852                         if_printf(ifp, "received %s from %s rssi %d\n",
 853                             ieee80211_mgt_subtype_name[subtype >>
 854                                 IEEE80211_FC0_SUBTYPE_SHIFT],
 855                             ether_sprintf(wh->i_addr2), rssi);
 856                 }
 857 #endif
 858                 if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
 859                         if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) {
 860                                 /*
 861                                  * Only shared key auth frames with a challenge
 862                                  * should be encrypted, discard all others.
 863                                  */
 864                                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 865                                     wh, ieee80211_mgt_subtype_name[subtype >>
 866                                         IEEE80211_FC0_SUBTYPE_SHIFT],
 867                                     "%s", "WEP set but not permitted");
 868                                 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
 869                                 goto out;
 870                         }
 871                         if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
 872                                 /*
 873                                  * Discard encrypted frames when privacy is off.
 874                                  */
 875                                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 876                                     wh, "mgt", "%s", "WEP set but PRIVACY off");
 877                                 vap->iv_stats.is_rx_noprivacy++;
 878                                 goto out;
 879                         }
 880                         hdrspace = ieee80211_hdrspace(ic, wh);
 881                         key = ieee80211_crypto_decap(ni, m, hdrspace);
 882                         if (key == NULL) {
 883                                 /* NB: stats+msgs handled in crypto_decap */
 884                                 goto out;
 885                         }
 886                         wh = mtod(m, struct ieee80211_frame *);
 887                         wh->i_fc[1] &= ~IEEE80211_FC1_WEP;
 888                 }
 889                 vap->iv_recv_mgmt(ni, m, subtype, rssi, nf);
 890                 goto out;
 891
 892         case IEEE80211_FC0_TYPE_CTL:
 893                 vap->iv_stats.is_rx_ctl++;
 894                 IEEE80211_NODE_STAT(ni, rx_ctrl);
 895                 vap->iv_recv_ctl(ni, m, subtype);
 896                 goto out;
 897
 898         default:
 899                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
 900                     wh, NULL, "bad frame type 0x%x", type);
 901                 /* should not come here */
 902                 break;
 903         }
 904 err:
 905         ifp->if_ierrors++;
 906 out:
 907         if (m != NULL) {
 908                 if (need_tap && ieee80211_radiotap_active_vap(vap))
 909                         ieee80211_radiotap_rx(vap, m);
 910                 m_freem(m);
 911         }
 912         return type;
 913 #undef SEQ_LEQ
 914 }
 915
 916 static void
 917 sta_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh,
 918     int rssi, int nf, uint16_t seq, uint16_t status)
 919 {
 920         struct ieee80211vap *vap = ni->ni_vap;
 921
 922         if (ni->ni_authmode == IEEE80211_AUTH_SHARED) {
 923                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
 924                     ni->ni_macaddr, "open auth",
 925                     "bad sta auth mode %u", ni->ni_authmode);
 926                 vap->iv_stats.is_rx_bad_auth++; /* XXX */
 927                 return;
 928         }
 929         if (vap->iv_state != IEEE80211_S_AUTH ||
 930             seq != IEEE80211_AUTH_OPEN_RESPONSE) {
 931                 vap->iv_stats.is_rx_bad_auth++;
 932                 return;
 933         }
 934         if (status != 0) {
 935                 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH,
 936                     ni, "open auth failed (reason %d)", status);
 937                 vap->iv_stats.is_rx_auth_fail++;
 938                 vap->iv_stats.is_rx_authfail_code = status;
 939                 ieee80211_new_state(vap, IEEE80211_S_SCAN,
 940                     IEEE80211_SCAN_FAIL_STATUS);
 941         } else
 942                 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0);
 943 }
 944
 945 static void
 946 sta_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh,
 947     uint8_t *frm, uint8_t *efrm, int rssi, int nf,
 948     uint16_t seq, uint16_t status)
 949 {
 950         struct ieee80211vap *vap = ni->ni_vap;
 951         uint8_t *challenge;
 952         int estatus;
 953
 954         /*
 955          * NB: this can happen as we allow pre-shared key
 956          * authentication to be enabled w/o wep being turned
 957          * on so that configuration of these can be done
 958          * in any order.  It may be better to enforce the
 959          * ordering in which case this check would just be
 960          * for sanity/consistency.
 961          */
 962         if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
 963                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
 964                     ni->ni_macaddr, "shared key auth",
 965                     "%s", " PRIVACY is disabled");
 966                 estatus = IEEE80211_STATUS_ALG;
 967                 goto bad;
 968         }
 969         /*
 970          * Pre-shared key authentication is evil; accept
 971          * it only if explicitly configured (it is supported
 972          * mainly for compatibility with clients like OS X).
 973          */
 974         if (ni->ni_authmode != IEEE80211_AUTH_AUTO &&
 975             ni->ni_authmode != IEEE80211_AUTH_SHARED) {
 976                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
 977                     ni->ni_macaddr, "shared key auth",
 978                     "bad sta auth mode %u", ni->ni_authmode);
 979                 vap->iv_stats.is_rx_bad_auth++; /* XXX maybe a unique error? */
 980                 estatus = IEEE80211_STATUS_ALG;
 981                 goto bad;
 982         }
 983
 984         challenge = NULL;
 985         if (frm + 1 < efrm) {
 986                 if ((frm[1] + 2) > (efrm - frm)) {
 987                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
 988                             ni->ni_macaddr, "shared key auth",
 989                             "ie %d/%d too long",
 990                             frm[0], (frm[1] + 2) - (efrm - frm));
 991                         vap->iv_stats.is_rx_bad_auth++;
 992                         estatus = IEEE80211_STATUS_CHALLENGE;
 993                         goto bad;
 994                 }
 995                 if (*frm == IEEE80211_ELEMID_CHALLENGE)
 996                         challenge = frm;
 997                 frm += frm[1] + 2;
 998         }
 999         switch (seq) {
1000         case IEEE80211_AUTH_SHARED_CHALLENGE:
1001         case IEEE80211_AUTH_SHARED_RESPONSE:
1002                 if (challenge == NULL) {
1003                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1004                             ni->ni_macaddr, "shared key auth",
1005                             "%s", "no challenge");
1006                         vap->iv_stats.is_rx_bad_auth++;
1007                         estatus = IEEE80211_STATUS_CHALLENGE;
1008                         goto bad;
1009                 }
1010                 if (challenge[1] != IEEE80211_CHALLENGE_LEN) {
1011                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1012                             ni->ni_macaddr, "shared key auth",
1013                             "bad challenge len %d", challenge[1]);
1014                         vap->iv_stats.is_rx_bad_auth++;
1015                         estatus = IEEE80211_STATUS_CHALLENGE;
1016                         goto bad;
1017                 }
1018         default:
1019                 break;
1020         }
1021         if (vap->iv_state != IEEE80211_S_AUTH)
1022                 return;
1023         switch (seq) {
1024         case IEEE80211_AUTH_SHARED_PASS:
1025                 if (ni->ni_challenge != NULL) {
1026                         free(ni->ni_challenge, M_80211_NODE);
1027                         ni->ni_challenge = NULL;
1028                 }
1029                 if (status != 0) {
1030                         IEEE80211_NOTE_FRAME(vap,
1031                             IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, wh,
1032                             "shared key auth failed (reason %d)", status);
1033                         vap->iv_stats.is_rx_auth_fail++;
1034                         vap->iv_stats.is_rx_authfail_code = status;
1035                         return;
1036                 }
1037                 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0);
1038                 break;
1039         case IEEE80211_AUTH_SHARED_CHALLENGE:
1040                 if (!ieee80211_alloc_challenge(ni))
1041                         return;
1042                 /* XXX could optimize by passing recvd challenge */
1043                 memcpy(ni->ni_challenge, &challenge[2], challenge[1]);
1044                 IEEE80211_SEND_MGMT(ni,
1045                         IEEE80211_FC0_SUBTYPE_AUTH, seq + 1);
1046                 break;
1047         default:
1048                 IEEE80211_DISCARD(vap, IEEE80211_MSG_AUTH,
1049                     wh, "shared key auth", "bad seq %d", seq);
1050                 vap->iv_stats.is_rx_bad_auth++;
1051                 return;
1052         }
1053         return;
1054 bad:
1055         /*
1056          * Kick the state machine.  This short-circuits
1057          * using the mgt frame timeout to trigger the
1058          * state transition.
1059          */
1060         if (vap->iv_state == IEEE80211_S_AUTH)
1061                 ieee80211_new_state(vap, IEEE80211_S_SCAN,
1062                     IEEE80211_SCAN_FAIL_STATUS);
1063 }
1064
1065 static int
1066 ieee80211_parse_wmeparams(struct ieee80211vap *vap, uint8_t *frm,
1067         const struct ieee80211_frame *wh)
1068 {
1069 #define MS(_v, _f)      (((_v) & _f) >> _f##_S)
1070         struct ieee80211_wme_state *wme = &vap->iv_ic->ic_wme;
1071         u_int len = frm[1], qosinfo;
1072         int i;
1073
1074         if (len < sizeof(struct ieee80211_wme_param)-2) {
1075                 IEEE80211_DISCARD_IE(vap,
1076                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WME,
1077                     wh, "WME", "too short, len %u", len);
1078                 return -1;
1079         }
1080         qosinfo = frm[__offsetof(struct ieee80211_wme_param, param_qosInfo)];
1081         qosinfo &= WME_QOSINFO_COUNT;
1082         /* XXX do proper check for wraparound */
1083         if (qosinfo == wme->wme_wmeChanParams.cap_info)
1084                 return 0;
1085         frm += __offsetof(struct ieee80211_wme_param, params_acParams);
1086         for (i = 0; i < WME_NUM_AC; i++) {
1087                 struct wmeParams *wmep =
1088                         &wme->wme_wmeChanParams.cap_wmeParams[i];
1089                 /* NB: ACI not used */
1090                 wmep->wmep_acm = MS(frm[0], WME_PARAM_ACM);
1091                 wmep->wmep_aifsn = MS(frm[0], WME_PARAM_AIFSN);
1092                 wmep->wmep_logcwmin = MS(frm[1], WME_PARAM_LOGCWMIN);
1093                 wmep->wmep_logcwmax = MS(frm[1], WME_PARAM_LOGCWMAX);
1094                 wmep->wmep_txopLimit = LE_READ_2(frm+2);
1095                 frm += 4;
1096         }
1097         wme->wme_wmeChanParams.cap_info = qosinfo;
1098         return 1;
1099 #undef MS
1100 }
1101
1102 /*
1103  * Process 11h Channel Switch Announcement (CSA) ie.  If this
1104  * is the first CSA then initiate the switch.  Otherwise we
1105  * track state and trigger completion and/or cancel of the switch.
1106  * XXX should be public for IBSS use
1107  */
1108 static void
1109 ieee80211_parse_csaparams(struct ieee80211vap *vap, uint8_t *frm,
1110         const struct ieee80211_frame *wh)
1111 {
1112         struct ieee80211com *ic = vap->iv_ic;
1113         const struct ieee80211_csa_ie *csa =
1114             (const struct ieee80211_csa_ie *) frm;
1115
1116         KASSERT(vap->iv_state >= IEEE80211_S_RUN,
1117             ("state %s", ieee80211_state_name[vap->iv_state]));
1118
1119         if (csa->csa_mode > 1) {
1120                 IEEE80211_DISCARD_IE(vap,
1121                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH,
1122                     wh, "CSA", "invalid mode %u", csa->csa_mode);
1123                 return;
1124         }
1125         IEEE80211_LOCK(ic);
1126         if ((ic->ic_flags & IEEE80211_F_CSAPENDING) == 0) {
1127                 /*
1128                  * Convert the channel number to a channel reference.  We
1129                  * try first to preserve turbo attribute of the current
1130                  * channel then fallback.  Note this will not work if the
1131                  * CSA specifies a channel that requires a band switch (e.g.
1132                  * 11a => 11g).  This is intentional as 11h is defined only
1133                  * for 5GHz/11a and because the switch does not involve a
1134                  * reassociation, protocol state (capabilities, negotated
1135                  * rates, etc) may/will be wrong.
1136                  */
1137                 struct ieee80211_channel *c =
1138                     ieee80211_find_channel_byieee(ic, csa->csa_newchan,
1139                         (ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALLTURBO));
1140                 if (c == NULL) {
1141                         c = ieee80211_find_channel_byieee(ic,
1142                             csa->csa_newchan,
1143                             (ic->ic_bsschan->ic_flags & IEEE80211_CHAN_ALL));
1144                         if (c == NULL) {
1145                                 IEEE80211_DISCARD_IE(vap,
1146                                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH,
1147                                     wh, "CSA", "invalid channel %u",
1148                                     csa->csa_newchan);
1149                                 goto done;
1150                         }
1151                 }
1152 #if IEEE80211_CSA_COUNT_MIN > 0
1153                 if (csa->csa_count < IEEE80211_CSA_COUNT_MIN) {
1154                         /*
1155                          * Require at least IEEE80211_CSA_COUNT_MIN count to
1156                          * reduce the risk of being redirected by a fabricated
1157                          * CSA.  If a valid CSA is dropped we'll still get a
1158                          * beacon miss when the AP leaves the channel so we'll
1159                          * eventually follow to the new channel.
1160                          *
1161                          * NOTE: this violates the 11h spec that states that
1162                          * count may be any value and if 0 then a switch
1163                          * should happen asap.
1164                          */
1165                         IEEE80211_DISCARD_IE(vap,
1166                             IEEE80211_MSG_ELEMID | IEEE80211_MSG_DOTH,
1167                             wh, "CSA", "count %u too small, must be >= %u",
1168                             csa->csa_count, IEEE80211_CSA_COUNT_MIN);
1169                         goto done;
1170                 }
1171 #endif
1172                 ieee80211_csa_startswitch(ic, c, csa->csa_mode, csa->csa_count);
1173         } else {
1174                 /*
1175                  * Validate this ie against the initial CSA.  We require
1176                  * mode and channel not change and the count must be
1177                  * monotonically decreasing.  This may be pointless and
1178                  * canceling the switch as a result may be too paranoid but
1179                  * in the worst case if we drop out of CSA because of this
1180                  * and the AP does move then we'll just end up taking a
1181                  * beacon miss and scan to find the AP.
1182                  *
1183                  * XXX may want <= on count as we also process ProbeResp
1184                  * frames and those may come in w/ the same count as the
1185                  * previous beacon; but doing so leaves us open to a stuck
1186                  * count until we add a dead-man timer
1187                  */
1188                 if (!(csa->csa_count < ic->ic_csa_count &&
1189                       csa->csa_mode == ic->ic_csa_mode &&
1190                       csa->csa_newchan == ieee80211_chan2ieee(ic, ic->ic_csa_newchan))) {
1191                         IEEE80211_NOTE_FRAME(vap, IEEE80211_MSG_DOTH, wh,
1192                             "CSA ie mismatch, initial ie <%d,%d,%d>, "
1193                             "this ie <%d,%d,%d>", ic->ic_csa_mode,
1194                             ic->ic_csa_newchan, ic->ic_csa_count,
1195                             csa->csa_mode, csa->csa_newchan, csa->csa_count);
1196                         ieee80211_csa_cancelswitch(ic);
1197                 } else {
1198                         if (csa->csa_count <= 1)
1199                                 ieee80211_csa_completeswitch(ic);
1200                         else
1201                                 ic->ic_csa_count = csa->csa_count;
1202                 }
1203         }
1204 done:
1205         IEEE80211_UNLOCK(ic);
1206 }
1207
1208 /*
1209  * Return non-zero if a background scan may be continued:
1210  * o bg scan is active
1211  * o no channel switch is pending
1212  * o there has not been any traffic recently
1213  *
1214  * Note we do not check if there is an administrative enable;
1215  * this is only done to start the scan.  We assume that any
1216  * change in state will be accompanied by a request to cancel
1217  * active scans which will otherwise cause this test to fail.
1218  */
1219 static __inline int
1220 contbgscan(struct ieee80211vap *vap)
1221 {
1222         struct ieee80211com *ic = vap->iv_ic;
1223
1224         return ((ic->ic_flags_ext & IEEE80211_FEXT_BGSCAN) &&
1225             (ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 &&
1226             vap->iv_state == IEEE80211_S_RUN &&         /* XXX? */
1227             time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle));
1228 }
1229
1230 /*
1231  * Return non-zero if a backgrond scan may be started:
1232  * o bg scanning is administratively enabled
1233  * o no channel switch is pending
1234  * o we are not boosted on a dynamic turbo channel
1235  * o there has not been a scan recently
1236  * o there has not been any traffic recently
1237  */
1238 static __inline int
1239 startbgscan(struct ieee80211vap *vap)
1240 {
1241         struct ieee80211com *ic = vap->iv_ic;
1242
1243         return ((vap->iv_flags & IEEE80211_F_BGSCAN) &&
1244             (ic->ic_flags & IEEE80211_F_CSAPENDING) == 0 &&
1245 #ifdef IEEE80211_SUPPORT_SUPERG
1246             !IEEE80211_IS_CHAN_DTURBO(ic->ic_curchan) &&
1247 #endif
1248             time_after(ticks, ic->ic_lastscan + vap->iv_bgscanintvl) &&
1249             time_after(ticks, ic->ic_lastdata + vap->iv_bgscanidle));
1250 }
1251
1252 static void
1253 sta_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0,
1254         int subtype, int rssi, int nf)
1255 {
1256 #define ISPROBE(_st)    ((_st) == IEEE80211_FC0_SUBTYPE_PROBE_RESP)
1257 #define ISREASSOC(_st)  ((_st) == IEEE80211_FC0_SUBTYPE_REASSOC_RESP)
1258         struct ieee80211vap *vap = ni->ni_vap;
1259         struct ieee80211com *ic = ni->ni_ic;
1260         struct ieee80211_frame *wh;
1261         uint8_t *frm, *efrm;
1262         uint8_t *rates, *xrates, *wme, *htcap, *htinfo;
1263         uint8_t rate;
1264
1265         wh = mtod(m0, struct ieee80211_frame *);
1266         frm = (uint8_t *)&wh[1];
1267         efrm = mtod(m0, uint8_t *) + m0->m_len;
1268         switch (subtype) {
1269         case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
1270         case IEEE80211_FC0_SUBTYPE_BEACON: {
1271                 struct ieee80211_scanparams scan;
1272                 /*
1273                  * We process beacon/probe response frames:
1274                  *    o when scanning, or
1275                  *    o station mode when associated (to collect state
1276                  *      updates such as 802.11g slot time)
1277                  * Frames otherwise received are discarded.
1278                  */
1279                 if (!((ic->ic_flags & IEEE80211_F_SCAN) || ni->ni_associd)) {
1280                         vap->iv_stats.is_rx_mgtdiscard++;
1281                         return;
1282                 }
1283                 /* XXX probe response in sta mode when !scanning? */
1284                 if (ieee80211_parse_beacon(ni, m0, &scan) != 0)
1285                         return;
1286                 /*
1287                  * Count frame now that we know it's to be processed.
1288                  */
1289                 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
1290                         vap->iv_stats.is_rx_beacon++;           /* XXX remove */
1291                         IEEE80211_NODE_STAT(ni, rx_beacons);
1292                 } else
1293                         IEEE80211_NODE_STAT(ni, rx_proberesp);
1294                 /*
1295                  * When operating in station mode, check for state updates.
1296                  * Be careful to ignore beacons received while doing a
1297                  * background scan.  We consider only 11g/WMM stuff right now.
1298                  */
1299                 if (ni->ni_associd != 0 &&
1300                     ((ic->ic_flags & IEEE80211_F_SCAN) == 0 ||
1301                      IEEE80211_ADDR_EQ(wh->i_addr2, ni->ni_bssid))) {
1302                         /* record tsf of last beacon */
1303                         memcpy(ni->ni_tstamp.data, scan.tstamp,
1304                                 sizeof(ni->ni_tstamp));
1305                         /* count beacon frame for s/w bmiss handling */
1306                         vap->iv_swbmiss_count++;
1307                         vap->iv_bmiss_count = 0;
1308                         if (ni->ni_erp != scan.erp) {
1309                                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC,
1310                                     wh->i_addr2,
1311                                     "erp change: was 0x%x, now 0x%x",
1312                                     ni->ni_erp, scan.erp);
1313                                 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) &&
1314                                     (ni->ni_erp & IEEE80211_ERP_USE_PROTECTION))
1315                                         ic->ic_flags |= IEEE80211_F_USEPROT;
1316                                 else
1317                                         ic->ic_flags &= ~IEEE80211_F_USEPROT;
1318                                 ni->ni_erp = scan.erp;
1319                                 /* XXX statistic */
1320                                 /* XXX driver notification */
1321                         }
1322                         if ((ni->ni_capinfo ^ scan.capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME) {
1323                                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC,
1324                                     wh->i_addr2,
1325                                     "capabilities change: was 0x%x, now 0x%x",
1326                                     ni->ni_capinfo, scan.capinfo);
1327                                 /*
1328                                  * NB: we assume short preamble doesn't
1329                                  *     change dynamically
1330                                  */
1331                                 ieee80211_set_shortslottime(ic,
1332                                         IEEE80211_IS_CHAN_A(ic->ic_bsschan) ||
1333                                         (scan.capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME));
1334                                 ni->ni_capinfo = (ni->ni_capinfo &~ IEEE80211_CAPINFO_SHORT_SLOTTIME)
1335                                                | (scan.capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME);
1336                                 /* XXX statistic */
1337                         }
1338                         if (scan.wme != NULL &&
1339                             (ni->ni_flags & IEEE80211_NODE_QOS) &&
1340                             ieee80211_parse_wmeparams(vap, scan.wme, wh) > 0)
1341                                 ieee80211_wme_updateparams(vap);
1342 #ifdef IEEE80211_SUPPORT_SUPERG
1343                         if (scan.ath != NULL)
1344                                 ieee80211_parse_athparams(ni, scan.ath, wh);
1345 #endif
1346                         if (scan.htcap != NULL && scan.htinfo != NULL &&
1347                             (vap->iv_flags_ht & IEEE80211_FHT_HT)) {
1348                                 ieee80211_ht_updateparams(ni,
1349                                     scan.htcap, scan.htinfo);
1350                                 /* XXX state changes? */
1351                         }
1352                         if (scan.tim != NULL) {
1353                                 struct ieee80211_tim_ie *tim =
1354                                     (struct ieee80211_tim_ie *) scan.tim;
1355 #if 0
1356                                 int aid = IEEE80211_AID(ni->ni_associd);
1357                                 int ix = aid / NBBY;
1358                                 int min = tim->tim_bitctl &~ 1;
1359                                 int max = tim->tim_len + min - 4;
1360                                 if ((tim->tim_bitctl&1) ||
1361                                     (min <= ix && ix <= max &&
1362                                      isset(tim->tim_bitmap - min, aid))) {
1363                                         /*
1364                                          * XXX Do not let bg scan kick off
1365                                          * we are expecting data.
1366                                          */
1367                                         ic->ic_lastdata = ticks;
1368                                         ieee80211_sta_pwrsave(vap, 0);
1369                                 }
1370 #endif
1371                                 ni->ni_dtim_count = tim->tim_count;
1372                                 ni->ni_dtim_period = tim->tim_period;
1373                         }
1374                         if (scan.csa != NULL &&
1375                             (vap->iv_flags & IEEE80211_F_DOTH))
1376                                 ieee80211_parse_csaparams(vap, scan.csa, wh);
1377                         else if (ic->ic_flags & IEEE80211_F_CSAPENDING) {
1378                                 /*
1379                                  * No CSA ie or 11h disabled, but a channel
1380                                  * switch is pending; drop out so we aren't
1381                                  * stuck in CSA state.  If the AP really is
1382                                  * moving we'll get a beacon miss and scan.
1383                                  */
1384                                 IEEE80211_LOCK(ic);
1385                                 ieee80211_csa_cancelswitch(ic);
1386                                 IEEE80211_UNLOCK(ic);
1387                         }
1388                         /*
1389                          * If scanning, pass the info to the scan module.
1390                          * Otherwise, check if it's the right time to do
1391                          * a background scan.  Background scanning must
1392                          * be enabled and we must not be operating in the
1393                          * turbo phase of dynamic turbo mode.  Then,
1394                          * it's been a while since the last background
1395                          * scan and if no data frames have come through
1396                          * recently, kick off a scan.  Note that this
1397                          * is the mechanism by which a background scan
1398                          * is started _and_ continued each time we
1399                          * return on-channel to receive a beacon from
1400                          * our ap.
1401                          */
1402                         if (ic->ic_flags & IEEE80211_F_SCAN) {
1403                                 ieee80211_add_scan(vap, &scan, wh,
1404                                         subtype, rssi, nf);
1405                         } else if (contbgscan(vap)) {
1406                                 ieee80211_bg_scan(vap, 0);
1407                         } else if (startbgscan(vap)) {
1408                                 vap->iv_stats.is_scan_bg++;
1409 #if 0
1410                                 /* wakeup if we are sleeing */
1411                                 ieee80211_set_pwrsave(vap, 0);
1412 #endif
1413                                 ieee80211_bg_scan(vap, 0);
1414                         }
1415                         return;
1416                 }
1417                 /*
1418                  * If scanning, just pass information to the scan module.
1419                  */
1420                 if (ic->ic_flags & IEEE80211_F_SCAN) {
1421                         if (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN) {
1422                                 /*
1423                                  * Actively scanning a channel marked passive;
1424                                  * send a probe request now that we know there
1425                                  * is 802.11 traffic present.
1426                                  *
1427                                  * XXX check if the beacon we recv'd gives
1428                                  * us what we need and suppress the probe req
1429                                  */
1430                                 ieee80211_probe_curchan(vap, 1);
1431                                 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
1432                         }
1433                         ieee80211_add_scan(vap, &scan, wh, subtype, rssi, nf);
1434                         return;
1435                 }
1436                 break;
1437         }
1438
1439         case IEEE80211_FC0_SUBTYPE_AUTH: {
1440                 uint16_t algo, seq, status;
1441                 /*
1442                  * auth frame format
1443                  *      [2] algorithm
1444                  *      [2] sequence
1445                  *      [2] status
1446                  *      [tlv*] challenge
1447                  */
1448                 IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return);
1449                 algo   = le16toh(*(uint16_t *)frm);
1450                 seq    = le16toh(*(uint16_t *)(frm + 2));
1451                 status = le16toh(*(uint16_t *)(frm + 4));
1452                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr2,
1453                     "recv auth frame with algorithm %d seq %d", algo, seq);
1454
1455                 if (vap->iv_flags & IEEE80211_F_COUNTERM) {
1456                         IEEE80211_DISCARD(vap,
1457                             IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO,
1458                             wh, "auth", "%s", "TKIP countermeasures enabled");
1459                         vap->iv_stats.is_rx_auth_countermeasures++;
1460                         if (vap->iv_opmode == IEEE80211_M_HOSTAP) {
1461                                 ieee80211_send_error(ni, wh->i_addr2,
1462                                         IEEE80211_FC0_SUBTYPE_AUTH,
1463                                         IEEE80211_REASON_MIC_FAILURE);
1464                         }
1465                         return;
1466                 }
1467                 if (algo == IEEE80211_AUTH_ALG_SHARED)
1468                         sta_auth_shared(ni, wh, frm + 6, efrm, rssi, nf,
1469                             seq, status);
1470                 else if (algo == IEEE80211_AUTH_ALG_OPEN)
1471                         sta_auth_open(ni, wh, rssi, nf, seq, status);
1472                 else {
1473                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1474                             wh, "auth", "unsupported alg %d", algo);
1475                         vap->iv_stats.is_rx_auth_unsupported++;
1476                         return;
1477                 }
1478                 break;
1479         }
1480
1481         case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
1482         case IEEE80211_FC0_SUBTYPE_REASSOC_RESP: {
1483                 uint16_t capinfo, associd;
1484                 uint16_t status;
1485
1486                 if (vap->iv_state != IEEE80211_S_ASSOC) {
1487                         vap->iv_stats.is_rx_mgtdiscard++;
1488                         return;
1489                 }
1490
1491                 /*
1492                  * asresp frame format
1493                  *      [2] capability information
1494                  *      [2] status
1495                  *      [2] association ID
1496                  *      [tlv] supported rates
1497                  *      [tlv] extended supported rates
1498                  *      [tlv] WME
1499                  *      [tlv] HT capabilities
1500                  *      [tlv] HT info
1501                  */
1502                 IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return);
1503                 ni = vap->iv_bss;
1504                 capinfo = le16toh(*(uint16_t *)frm);
1505                 frm += 2;
1506                 status = le16toh(*(uint16_t *)frm);
1507                 frm += 2;
1508                 if (status != 0) {
1509                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC,
1510                             wh->i_addr2, "%sassoc failed (reason %d)",
1511                             ISREASSOC(subtype) ?  "re" : "", status);
1512                         vap->iv_stats.is_rx_auth_fail++;        /* XXX */
1513                         return;
1514                 }
1515                 associd = le16toh(*(uint16_t *)frm);
1516                 frm += 2;
1517
1518                 rates = xrates = wme = htcap = htinfo = NULL;
1519                 while (efrm - frm > 1) {
1520                         IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
1521                         switch (*frm) {
1522                         case IEEE80211_ELEMID_RATES:
1523                                 rates = frm;
1524                                 break;
1525                         case IEEE80211_ELEMID_XRATES:
1526                                 xrates = frm;
1527                                 break;
1528                         case IEEE80211_ELEMID_HTCAP:
1529                                 htcap = frm;
1530                                 break;
1531                         case IEEE80211_ELEMID_HTINFO:
1532                                 htinfo = frm;
1533                                 break;
1534                         case IEEE80211_ELEMID_VENDOR:
1535                                 if (iswmeoui(frm))
1536                                         wme = frm;
1537                                 else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) {
1538                                         /*
1539                                          * Accept pre-draft HT ie's if the
1540                                          * standard ones have not been seen.
1541                                          */
1542                                         if (ishtcapoui(frm)) {
1543                                                 if (htcap == NULL)
1544                                                         htcap = frm;
1545                                         } else if (ishtinfooui(frm)) {
1546                                                 if (htinfo == NULL)
1547                                                         htcap = frm;
1548                                         }
1549                                 }
1550                                 /* XXX Atheros OUI support */
1551                                 break;
1552                         }
1553                         frm += frm[1] + 2;
1554                 }
1555
1556                 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
1557                 if (xrates != NULL)
1558                         IEEE80211_VERIFY_ELEMENT(xrates,
1559                                 IEEE80211_RATE_MAXSIZE - rates[1], return);
1560                 rate = ieee80211_setup_rates(ni, rates, xrates,
1561                                 IEEE80211_F_JOIN |
1562                                 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE |
1563                                 IEEE80211_F_DONEGO | IEEE80211_F_DODEL);
1564                 if (rate & IEEE80211_RATE_BASIC) {
1565                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ASSOC,
1566                             wh->i_addr2,
1567                             "%sassoc failed (rate set mismatch)",
1568                             ISREASSOC(subtype) ?  "re" : "");
1569                         vap->iv_stats.is_rx_assoc_norate++;
1570                         ieee80211_new_state(vap, IEEE80211_S_SCAN,
1571                             IEEE80211_SCAN_FAIL_STATUS);
1572                         return;
1573                 }
1574
1575                 ni->ni_capinfo = capinfo;
1576                 ni->ni_associd = associd;
1577                 if (ni->ni_jointime == 0)
1578                         ni->ni_jointime = time_uptime;
1579                 if (wme != NULL &&
1580                     ieee80211_parse_wmeparams(vap, wme, wh) >= 0) {
1581                         ni->ni_flags |= IEEE80211_NODE_QOS;
1582                         ieee80211_wme_updateparams(vap);
1583                 } else
1584                         ni->ni_flags &= ~IEEE80211_NODE_QOS;
1585                 /*
1586                  * Setup HT state according to the negotiation.
1587                  *
1588                  * NB: shouldn't need to check if HT use is enabled but some
1589                  *     ap's send back HT ie's even when we don't indicate we
1590                  *     are HT capable in our AssocReq.
1591                  */
1592                 if (htcap != NULL && htinfo != NULL &&
1593                     (vap->iv_flags_ht & IEEE80211_FHT_HT)) {
1594                         ieee80211_ht_node_init(ni);
1595                         ieee80211_ht_updateparams(ni, htcap, htinfo);
1596                         ieee80211_setup_htrates(ni, htcap,
1597                              IEEE80211_F_JOIN | IEEE80211_F_DOBRS);
1598                         ieee80211_setup_basic_htrates(ni, htinfo);
1599                         ieee80211_node_setuptxparms(ni);
1600                 } else {
1601 #ifdef IEEE80211_SUPPORT_SUPERG
1602                         if (IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_ATH))
1603                                 ieee80211_ff_node_init(ni);
1604 #endif
1605                 }
1606                 /*
1607                  * Configure state now that we are associated.
1608                  *
1609                  * XXX may need different/additional driver callbacks?
1610                  */
1611                 if (IEEE80211_IS_CHAN_A(ic->ic_curchan) ||
1612                     (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_PREAMBLE)) {
1613                         ic->ic_flags |= IEEE80211_F_SHPREAMBLE;
1614                         ic->ic_flags &= ~IEEE80211_F_USEBARKER;
1615                 } else {
1616                         ic->ic_flags &= ~IEEE80211_F_SHPREAMBLE;
1617                         ic->ic_flags |= IEEE80211_F_USEBARKER;
1618                 }
1619                 ieee80211_set_shortslottime(ic,
1620                         IEEE80211_IS_CHAN_A(ic->ic_curchan) ||
1621                         (ni->ni_capinfo & IEEE80211_CAPINFO_SHORT_SLOTTIME));
1622                 /*
1623                  * Honor ERP protection.
1624                  *
1625                  * NB: ni_erp should zero for non-11g operation.
1626                  */
1627                 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) &&
1628                     (ni->ni_erp & IEEE80211_ERP_USE_PROTECTION))
1629                         ic->ic_flags |= IEEE80211_F_USEPROT;
1630                 else
1631                         ic->ic_flags &= ~IEEE80211_F_USEPROT;
1632                 IEEE80211_NOTE_MAC(vap,
1633                     IEEE80211_MSG_ASSOC | IEEE80211_MSG_DEBUG, wh->i_addr2,
1634                     "%sassoc success at aid %d: %s preamble, %s slot time%s%s%s%s%s%s%s%s",
1635                     ISREASSOC(subtype) ? "re" : "",
1636                     IEEE80211_NODE_AID(ni),
1637                     ic->ic_flags&IEEE80211_F_SHPREAMBLE ? "short" : "long",
1638                     ic->ic_flags&IEEE80211_F_SHSLOT ? "short" : "long",
1639                     ic->ic_flags&IEEE80211_F_USEPROT ? ", protection" : "",
1640                     ni->ni_flags & IEEE80211_NODE_QOS ? ", QoS" : "",
1641                     ni->ni_flags & IEEE80211_NODE_HT ?
1642                         (ni->ni_chw == 40 ? ", HT40" : ", HT20") : "",
1643                     ni->ni_flags & IEEE80211_NODE_AMPDU ? " (+AMPDU)" : "",
1644                     ni->ni_flags & IEEE80211_NODE_MIMO_RTS ? " (+SMPS-DYN)" :
1645                         ni->ni_flags & IEEE80211_NODE_MIMO_PS ? " (+SMPS)" : "",
1646                     ni->ni_flags & IEEE80211_NODE_RIFS ? " (+RIFS)" : "",
1647                     IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_FF) ?
1648                         ", fast-frames" : "",
1649                     IEEE80211_ATH_CAP(vap, ni, IEEE80211_NODE_TURBOP) ?
1650                         ", turbo" : ""
1651                 );
1652                 ieee80211_new_state(vap, IEEE80211_S_RUN, subtype);
1653                 break;
1654         }
1655
1656         case IEEE80211_FC0_SUBTYPE_DEAUTH: {
1657                 uint16_t reason;
1658
1659                 if (vap->iv_state == IEEE80211_S_SCAN) {
1660                         vap->iv_stats.is_rx_mgtdiscard++;
1661                         return;
1662                 }
1663                 if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) {
1664                         /* NB: can happen when in promiscuous mode */
1665                         vap->iv_stats.is_rx_mgtdiscard++;
1666                         break;
1667                 }
1668
1669                 /*
1670                  * deauth frame format
1671                  *      [2] reason
1672                  */
1673                 IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return);
1674                 reason = le16toh(*(uint16_t *)frm);
1675
1676                 vap->iv_stats.is_rx_deauth++;
1677                 vap->iv_stats.is_rx_deauth_code = reason;
1678                 IEEE80211_NODE_STAT(ni, rx_deauth);
1679
1680                 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni,
1681                     "recv deauthenticate (reason %d)", reason);
1682                 ieee80211_new_state(vap, IEEE80211_S_AUTH,
1683                     (reason << 8) | IEEE80211_FC0_SUBTYPE_DEAUTH);
1684                 break;
1685         }
1686
1687         case IEEE80211_FC0_SUBTYPE_DISASSOC: {
1688                 uint16_t reason;
1689
1690                 if (vap->iv_state != IEEE80211_S_RUN &&
1691                     vap->iv_state != IEEE80211_S_ASSOC &&
1692                     vap->iv_state != IEEE80211_S_AUTH) {
1693                         vap->iv_stats.is_rx_mgtdiscard++;
1694                         return;
1695                 }
1696                 if (!IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) {
1697                         /* NB: can happen when in promiscuous mode */
1698                         vap->iv_stats.is_rx_mgtdiscard++;
1699                         break;
1700                 }
1701
1702                 /*
1703                  * disassoc frame format
1704                  *      [2] reason
1705                  */
1706                 IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return);
1707                 reason = le16toh(*(uint16_t *)frm);
1708
1709                 vap->iv_stats.is_rx_disassoc++;
1710                 vap->iv_stats.is_rx_disassoc_code = reason;
1711                 IEEE80211_NODE_STAT(ni, rx_disassoc);
1712
1713                 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni,
1714                     "recv disassociate (reason %d)", reason);
1715                 ieee80211_new_state(vap, IEEE80211_S_ASSOC, 0);
1716                 break;
1717         }
1718
1719         case IEEE80211_FC0_SUBTYPE_ACTION:
1720                 if (vap->iv_state == IEEE80211_S_RUN) {
1721                         if (ieee80211_parse_action(ni, m0) == 0)
1722                                 ic->ic_recv_action(ni, wh, frm, efrm);
1723                 } else
1724                         vap->iv_stats.is_rx_mgtdiscard++;
1725                 break;
1726
1727         case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
1728         case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
1729         case IEEE80211_FC0_SUBTYPE_REASSOC_REQ:
1730                 vap->iv_stats.is_rx_mgtdiscard++;
1731                 return;
1732         default:
1733                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1734                      wh, "mgt", "subtype 0x%x not handled", subtype);
1735                 vap->iv_stats.is_rx_badsubtype++;
1736                 break;
1737         }
1738 #undef ISREASSOC
1739 #undef ISPROBE
1740 }
1741
1742 static void
1743 sta_recv_ctl(struct ieee80211_node *ni, struct mbuf *m0, int subtype)
1744 {
1745 }