sys/netproto/802_11/wlan/ieee80211_hostap.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  * $FreeBSD: head/sys/net80211/ieee80211_hostap.c 203422 2010-02-03 10:07:43Z rpaulo $
  26  */
  27
  28 /*
  29  * IEEE 802.11 HOSTAP mode support.
  30  */
  31 #include "opt_inet.h"
  32 #include "opt_wlan.h"
  33
  34 #include <sys/param.h>
  35 #include <sys/systm.h>
  36 #include <sys/mbuf.h>
  37 #include <sys/malloc.h>
  38 #include <sys/kernel.h>
  39
  40 #include <sys/socket.h>
  41 #include <sys/sockio.h>
  42 #include <sys/endian.h>
  43 #include <sys/errno.h>
  44 #include <sys/proc.h>
  45 #include <sys/sysctl.h>
  46
  47 #include <net/if.h>
  48 #include <net/if_media.h>
  49 #include <net/if_llc.h>
  50 #include <net/ifq_var.h>
  51 #include <net/ethernet.h>
  52 #include <net/route.h>
  53
  54 #include <net/bpf.h>
  55
  56 #include <netproto/802_11/ieee80211_var.h>
  57 #include <netproto/802_11/ieee80211_hostap.h>
  58 #include <netproto/802_11/ieee80211_input.h>
  59 #ifdef IEEE80211_SUPPORT_SUPERG
  60 #include <netproto/802_11/ieee80211_superg.h>
  61 #endif
  62 #include <netproto/802_11/ieee80211_wds.h>
  63
  64 #define IEEE80211_RATE2MBS(r)   (((r) & IEEE80211_RATE_VAL) / 2)
  65
  66 static  void hostap_vattach(struct ieee80211vap *);
  67 static  int hostap_newstate(struct ieee80211vap *, enum ieee80211_state, int);
  68 static  int hostap_input(struct ieee80211_node *ni, struct mbuf *m,
  69             int rssi, int nf);
  70 static void hostap_deliver_data(struct ieee80211vap *,
  71             struct ieee80211_node *, struct mbuf *);
  72 static void hostap_recv_mgmt(struct ieee80211_node *, struct mbuf *,
  73             int subtype, int rssi, int nf);
  74 static void hostap_recv_ctl(struct ieee80211_node *, struct mbuf *, int);
  75 static void hostap_recv_pspoll(struct ieee80211_node *, struct mbuf *);
  76
  77 void
  78 ieee80211_hostap_attach(struct ieee80211com *ic)
  79 {
  80         ic->ic_vattach[IEEE80211_M_HOSTAP] = hostap_vattach;
  81 }
  82
  83 void
  84 ieee80211_hostap_detach(struct ieee80211com *ic)
  85 {
  86 }
  87
  88 static void
  89 hostap_vdetach(struct ieee80211vap *vap)
  90 {
  91 }
  92
  93 static void
  94 hostap_vattach(struct ieee80211vap *vap)
  95 {
  96         vap->iv_newstate = hostap_newstate;
  97         vap->iv_input = hostap_input;
  98         vap->iv_recv_mgmt = hostap_recv_mgmt;
  99         vap->iv_recv_ctl = hostap_recv_ctl;
 100         vap->iv_opdetach = hostap_vdetach;
 101         vap->iv_deliver_data = hostap_deliver_data;
 102 }
 103
 104 static void
 105 sta_disassoc(void *arg, struct ieee80211_node *ni)
 106 {
 107         struct ieee80211vap *vap = arg;
 108
 109         if (ni->ni_vap == vap && ni->ni_associd != 0) {
 110                 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DISASSOC,
 111                         IEEE80211_REASON_ASSOC_LEAVE);
 112                 ieee80211_node_leave(ni);
 113         }
 114 }
 115
 116 static void
 117 sta_csa(void *arg, struct ieee80211_node *ni)
 118 {
 119         struct ieee80211vap *vap = arg;
 120
 121         if (ni->ni_vap == vap && ni->ni_associd != 0)
 122                 if (ni->ni_inact > vap->iv_inact_init) {
 123                         ni->ni_inact = vap->iv_inact_init;
 124                         IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
 125                             "%s: inact %u", __func__, ni->ni_inact);
 126                 }
 127 }
 128
 129 static void
 130 sta_drop(void *arg, struct ieee80211_node *ni)
 131 {
 132         struct ieee80211vap *vap = arg;
 133
 134         if (ni->ni_vap == vap && ni->ni_associd != 0)
 135                 ieee80211_node_leave(ni);
 136 }
 137
 138 /*
 139  * Does a channel change require associated stations to re-associate
 140  * so protocol state is correct.  This is used when doing CSA across
 141  * bands or similar (e.g. HT -> legacy).
 142  */
 143 static int
 144 isbandchange(struct ieee80211com *ic)
 145 {
 146         return ((ic->ic_bsschan->ic_flags ^ ic->ic_csa_newchan->ic_flags) &
 147             (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_5GHZ | IEEE80211_CHAN_HALF |
 148              IEEE80211_CHAN_QUARTER | IEEE80211_CHAN_HT)) != 0;
 149 }
 150
 151 /*
 152  * IEEE80211_M_HOSTAP vap state machine handler.
 153  */
 154 static int
 155 hostap_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
 156 {
 157         struct ieee80211com *ic = vap->iv_ic;
 158         enum ieee80211_state ostate;
 159
 160         ostate = vap->iv_state;
 161         IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
 162             __func__, ieee80211_state_name[ostate],
 163             ieee80211_state_name[nstate], arg);
 164         vap->iv_state = nstate;                 /* state transition */
 165         if (ostate != IEEE80211_S_SCAN)
 166                 ieee80211_cancel_scan(vap);     /* background scan */
 167         switch (nstate) {
 168         case IEEE80211_S_INIT:
 169                 switch (ostate) {
 170                 case IEEE80211_S_SCAN:
 171                         ieee80211_cancel_scan(vap);
 172                         break;
 173                 case IEEE80211_S_CAC:
 174                         ieee80211_dfs_cac_stop(vap);
 175                         break;
 176                 case IEEE80211_S_RUN:
 177                         ieee80211_iterate_nodes(&ic->ic_sta, sta_disassoc, vap);
 178                         break;
 179                 default:
 180                         break;
 181                 }
 182                 if (ostate != IEEE80211_S_INIT) {
 183                         /* NB: optimize INIT -> INIT case */
 184                         ieee80211_reset_bss(vap);
 185                 }
 186                 if (vap->iv_auth->ia_detach != NULL)
 187                         vap->iv_auth->ia_detach(vap);
 188                 break;
 189         case IEEE80211_S_SCAN:
 190                 switch (ostate) {
 191                 case IEEE80211_S_CSA:
 192                 case IEEE80211_S_RUN:
 193                         ieee80211_iterate_nodes(&ic->ic_sta, sta_disassoc, vap);
 194                         /*
 195                          * Clear overlapping BSS state; the beacon frame
 196                          * will be reconstructed on transition to the RUN
 197                          * state and the timeout routines check if the flag
 198                          * is set before doing anything so this is sufficient.
 199                          */
 200                         ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR;
 201                         ic->ic_flags_ht &= ~IEEE80211_FHT_NONHT_PR;
 202                         /* fall thru... */
 203                 case IEEE80211_S_CAC:
 204                         /*
 205                          * NB: We may get here because of a manual channel
 206                          *     change in which case we need to stop CAC
 207                          * XXX no need to stop if ostate RUN but it's ok
 208                          */
 209                         ieee80211_dfs_cac_stop(vap);
 210                         /* fall thru... */
 211                 case IEEE80211_S_INIT:
 212                         if (vap->iv_des_chan != IEEE80211_CHAN_ANYC &&
 213                             !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan)) {
 214                                 /*
 215                                  * Already have a channel; bypass the
 216                                  * scan and startup immediately.
 217                                  * ieee80211_create_ibss will call back to
 218                                  * move us to RUN state.
 219                                  */
 220                                 ieee80211_create_ibss(vap, vap->iv_des_chan);
 221                                 break;
 222                         }
 223                         /*
 224                          * Initiate a scan.  We can come here as a result
 225                          * of an IEEE80211_IOC_SCAN_REQ too in which case
 226                          * the vap will be marked with IEEE80211_FEXT_SCANREQ
 227                          * and the scan request parameters will be present
 228                          * in iv_scanreq.  Otherwise we do the default.
 229                          */
 230                         if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
 231                                 ieee80211_check_scan(vap,
 232                                     vap->iv_scanreq_flags,
 233                                     vap->iv_scanreq_duration,
 234                                     vap->iv_scanreq_mindwell,
 235                                     vap->iv_scanreq_maxdwell,
 236                                     vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
 237                                 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
 238                         } else
 239                                 ieee80211_check_scan_current(vap);
 240                         break;
 241                 case IEEE80211_S_SCAN:
 242                         /*
 243                          * A state change requires a reset; scan.
 244                          */
 245                         ieee80211_check_scan_current(vap);
 246                         break;
 247                 default:
 248                         break;
 249                 }
 250                 break;
 251         case IEEE80211_S_CAC:
 252                 /*
 253                  * Start CAC on a DFS channel.  We come here when starting
 254                  * a bss on a DFS channel (see ieee80211_create_ibss).
 255                  */
 256                 ieee80211_dfs_cac_start(vap);
 257                 break;
 258         case IEEE80211_S_RUN:
 259                 if (vap->iv_flags & IEEE80211_F_WPA) {
 260                         /* XXX validate prerequisites */
 261                 }
 262                 switch (ostate) {
 263                 case IEEE80211_S_INIT:
 264                         /*
 265                          * Already have a channel; bypass the
 266                          * scan and startup immediately.
 267                          * Note that ieee80211_create_ibss will call
 268                          * back to do a RUN->RUN state change.
 269                          */
 270                         ieee80211_create_ibss(vap,
 271                             ieee80211_ht_adjust_channel(ic,
 272                                 ic->ic_curchan, vap->iv_flags_ht));
 273                         /* NB: iv_bss is changed on return */
 274                         break;
 275                 case IEEE80211_S_CAC:
 276                         /*
 277                          * NB: This is the normal state change when CAC
 278                          * expires and no radar was detected; no need to
 279                          * clear the CAC timer as it's already expired.
 280                          */
 281                         /* fall thru... */
 282                 case IEEE80211_S_CSA:
 283                         /*
 284                          * Shorten inactivity timer of associated stations
 285                          * to weed out sta's that don't follow a CSA.
 286                          */
 287                         ieee80211_iterate_nodes(&ic->ic_sta, sta_csa, vap);
 288                         /*
 289                          * Update bss node channel to reflect where
 290                          * we landed after CSA.
 291                          */
 292                         ieee80211_node_set_chan(vap->iv_bss,
 293                             ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
 294                                 ieee80211_htchanflags(vap->iv_bss->ni_chan)));
 295                         /* XXX bypass debug msgs */
 296                         break;
 297                 case IEEE80211_S_SCAN:
 298                 case IEEE80211_S_RUN:
 299 #ifdef IEEE80211_DEBUG
 300                         if (ieee80211_msg_debug(vap)) {
 301                                 struct ieee80211_node *ni = vap->iv_bss;
 302                                 ieee80211_note(vap,
 303                                     "synchronized with %6D ssid ",
 304                                     ni->ni_bssid, ":");
 305                                 ieee80211_print_essid(ni->ni_essid,
 306                                     ni->ni_esslen);
 307                                 /* XXX MCS/HT */
 308                                 kprintf(" channel %d start %uMb\n",
 309                                     ieee80211_chan2ieee(ic, ic->ic_curchan),
 310                                     IEEE80211_RATE2MBS(ni->ni_txrate));
 311                         }
 312 #endif
 313                         break;
 314                 default:
 315                         break;
 316                 }
 317                 /*
 318                  * Start/stop the authenticator.  We delay until here
 319                  * to allow configuration to happen out of order.
 320                  */
 321                 if (vap->iv_auth->ia_attach != NULL) {
 322                         /* XXX check failure */
 323                         vap->iv_auth->ia_attach(vap);
 324                 } else if (vap->iv_auth->ia_detach != NULL) {
 325                         vap->iv_auth->ia_detach(vap);
 326                 }
 327                 ieee80211_node_authorize(vap->iv_bss);
 328                 break;
 329         case IEEE80211_S_CSA:
 330                 if (ostate == IEEE80211_S_RUN && isbandchange(ic)) {
 331                         /*
 332                          * On a ``band change'' silently drop associated
 333                          * stations as they must re-associate before they
 334                          * can pass traffic (as otherwise protocol state
 335                          * such as capabilities and the negotiated rate
 336                          * set may/will be wrong).
 337                          */
 338                         ieee80211_iterate_nodes(&ic->ic_sta, sta_drop, vap);
 339                 }
 340                 break;
 341         default:
 342                 break;
 343         }
 344         return 0;
 345 }
 346
 347 static void
 348 hostap_deliver_data(struct ieee80211vap *vap,
 349         struct ieee80211_node *ni, struct mbuf *m)
 350 {
 351         struct ether_header *eh = mtod(m, struct ether_header *);
 352         struct ifnet *ifp = vap->iv_ifp;
 353
 354         /* clear driver/net80211 flags before passing up */
 355         m->m_flags &= ~(M_80211_RX | M_MCAST | M_BCAST);
 356
 357         KASSERT(vap->iv_opmode == IEEE80211_M_HOSTAP,
 358             ("gack, opmode %d", vap->iv_opmode));
 359         /*
 360          * Do accounting.
 361          */
 362         ifp->if_ipackets++;
 363         IEEE80211_NODE_STAT(ni, rx_data);
 364         IEEE80211_NODE_STAT_ADD(ni, rx_bytes, m->m_pkthdr.len);
 365         if (ETHER_IS_MULTICAST(eh->ether_dhost)) {
 366                 m->m_flags |= M_MCAST;          /* XXX M_BCAST? */
 367                 IEEE80211_NODE_STAT(ni, rx_mcast);
 368         } else
 369                 IEEE80211_NODE_STAT(ni, rx_ucast);
 370
 371         /* perform as a bridge within the AP */
 372         if ((vap->iv_flags & IEEE80211_F_NOBRIDGE) == 0) {
 373                 struct mbuf *mcopy = NULL;
 374
 375                 if (m->m_flags & M_MCAST) {
 376                         mcopy = m_dup(m, MB_DONTWAIT);
 377                         if (mcopy == NULL)
 378                                 ifp->if_oerrors++;
 379                         else
 380                                 mcopy->m_flags |= M_MCAST;
 381                 } else {
 382                         /*
 383                          * Check if the destination is associated with the
 384                          * same vap and authorized to receive traffic.
 385                          * Beware of traffic destined for the vap itself;
 386                          * sending it will not work; just let it be delivered
 387                          * normally.
 388                          */
 389                         struct ieee80211_node *sta = ieee80211_find_vap_node(
 390                              &vap->iv_ic->ic_sta, vap, eh->ether_dhost);
 391                         if (sta != NULL) {
 392                                 if (ieee80211_node_is_authorized(sta)) {
 393                                         /*
 394                                          * Beware of sending to ourself; this
 395                                          * needs to happen via the normal
 396                                          * input path.
 397                                          */
 398                                         if (sta != vap->iv_bss) {
 399                                                 mcopy = m;
 400                                                 m = NULL;
 401                                         }
 402                                 } else {
 403                                         vap->iv_stats.is_rx_unauth++;
 404                                         IEEE80211_NODE_STAT(sta, rx_unauth);
 405                                 }
 406                                 ieee80211_free_node(sta);
 407                         }
 408                 }
 409                 if (mcopy != NULL) {
 410                         int len, err;
 411                         len = mcopy->m_pkthdr.len;
 412                         err = ieee80211_handoff(ifp, mcopy);
 413                         if (err) {
 414                                 /* NB: IFQ_HANDOFF reclaims mcopy */
 415                         } else {
 416                                 ifp->if_opackets++;
 417                         }
 418                 }
 419         }
 420         if (m != NULL) {
 421                 /*
 422                  * Mark frame as coming from vap's interface.
 423                  */
 424                 m->m_pkthdr.rcvif = ifp;
 425                 if (m->m_flags & M_MCAST) {
 426                         /*
 427                          * Spam DWDS vap's w/ multicast traffic.
 428                          */
 429                         /* XXX only if dwds in use? */
 430                         ieee80211_dwds_mcast(vap, m);
 431                 }
 432                 if (ni->ni_vlan != 0) {
 433                         /* attach vlan tag */
 434                         m->m_pkthdr.ether_vlantag = ni->ni_vlan;
 435                         m->m_flags |= M_VLANTAG;
 436                 }
 437                 ifp->if_input(ifp, m);
 438         }
 439 }
 440
 441 /*
 442  * Decide if a received management frame should be
 443  * printed when debugging is enabled.  This filters some
 444  * of the less interesting frames that come frequently
 445  * (e.g. beacons).
 446  */
 447 static __inline int
 448 doprint(struct ieee80211vap *vap, int subtype)
 449 {
 450         switch (subtype) {
 451         case IEEE80211_FC0_SUBTYPE_BEACON:
 452                 return (vap->iv_ic->ic_flags & IEEE80211_F_SCAN);
 453         case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
 454                 return 0;
 455         }
 456         return 1;
 457 }
 458
 459 /*
 460  * Process a received frame.  The node associated with the sender
 461  * should be supplied.  If nothing was found in the node table then
 462  * the caller is assumed to supply a reference to iv_bss instead.
 463  * The RSSI and a timestamp are also supplied.  The RSSI data is used
 464  * during AP scanning to select a AP to associate with; it can have
 465  * any units so long as values have consistent units and higher values
 466  * mean ``better signal''.  The receive timestamp is currently not used
 467  * by the 802.11 layer.
 468  */
 469 static int
 470 hostap_input(struct ieee80211_node *ni, struct mbuf *m, int rssi, int nf)
 471 {
 472 #define SEQ_LEQ(a,b)    ((int)((a)-(b)) <= 0)
 473 #define HAS_SEQ(type)   ((type & 0x4) == 0)
 474         struct ieee80211vap *vap = ni->ni_vap;
 475         struct ieee80211com *ic = ni->ni_ic;
 476         struct ifnet *ifp = vap->iv_ifp;
 477         struct ieee80211_frame *wh;
 478         struct ieee80211_key *key;
 479         struct ether_header *eh;
 480         int hdrspace, need_tap = 1;     /* mbuf need to be tapped. */
 481         uint8_t dir, type, subtype, qos;
 482         uint8_t *bssid;
 483         uint16_t rxseq;
 484
 485         if (m->m_flags & M_AMPDU_MPDU) {
 486                 /*
 487                  * Fastpath for A-MPDU reorder q resubmission.  Frames
 488                  * w/ M_AMPDU_MPDU marked have already passed through
 489                  * here but were received out of order and been held on
 490                  * the reorder queue.  When resubmitted they are marked
 491                  * with the M_AMPDU_MPDU flag and we can bypass most of
 492                  * the normal processing.
 493                  */
 494                 wh = mtod(m, struct ieee80211_frame *);
 495                 type = IEEE80211_FC0_TYPE_DATA;
 496                 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
 497                 subtype = IEEE80211_FC0_SUBTYPE_QOS;
 498                 hdrspace = ieee80211_hdrspace(ic, wh);  /* XXX optimize? */
 499                 goto resubmit_ampdu;
 500         }
 501
 502         KASSERT(ni != NULL, ("null node"));
 503         ni->ni_inact = ni->ni_inact_reload;
 504
 505         type = -1;                      /* undefined */
 506
 507         if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
 508                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 509                     ni->ni_macaddr, NULL,
 510                     "too short (1): len %u", m->m_pkthdr.len);
 511                 vap->iv_stats.is_rx_tooshort++;
 512                 goto out;
 513         }
 514         /*
 515          * Bit of a cheat here, we use a pointer for a 3-address
 516          * frame format but don't reference fields past outside
 517          * ieee80211_frame_min w/o first validating the data is
 518          * present.
 519          */
 520         wh = mtod(m, struct ieee80211_frame *);
 521
 522         if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
 523             IEEE80211_FC0_VERSION_0) {
 524                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 525                     ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x",
 526                     wh->i_fc[0], wh->i_fc[1]);
 527                 vap->iv_stats.is_rx_badversion++;
 528                 goto err;
 529         }
 530
 531         dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
 532         type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
 533         subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
 534         if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
 535                 if (dir != IEEE80211_FC1_DIR_NODS)
 536                         bssid = wh->i_addr1;
 537                 else if (type == IEEE80211_FC0_TYPE_CTL)
 538                         bssid = wh->i_addr1;
 539                 else {
 540                         if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
 541                                 IEEE80211_DISCARD_MAC(vap,
 542                                     IEEE80211_MSG_ANY, ni->ni_macaddr,
 543                                     NULL, "too short (2): len %u",
 544                                     m->m_pkthdr.len);
 545                                 vap->iv_stats.is_rx_tooshort++;
 546                                 goto out;
 547                         }
 548                         bssid = wh->i_addr3;
 549                 }
 550                 /*
 551                  * Validate the bssid.
 552                  */
 553                 if (!(type == IEEE80211_FC0_TYPE_MGT &&
 554                       subtype == IEEE80211_FC0_SUBTYPE_BEACON) &&
 555                     !IEEE80211_ADDR_EQ(bssid, vap->iv_bss->ni_bssid) &&
 556                     !IEEE80211_ADDR_EQ(bssid, ifp->if_broadcastaddr)) {
 557                         /* not interested in */
 558                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
 559                             bssid, NULL, "%s", "not to bss");
 560                         vap->iv_stats.is_rx_wrongbss++;
 561                         goto out;
 562                 }
 563
 564                 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
 565                 ni->ni_noise = nf;
 566                 if (HAS_SEQ(type)) {
 567                         uint8_t tid = ieee80211_gettid(wh);
 568                         if (IEEE80211_QOS_HAS_SEQ(wh) &&
 569                             TID_TO_WME_AC(tid) >= WME_AC_VI)
 570                                 ic->ic_wme.wme_hipri_traffic++;
 571                         rxseq = le16toh(*(uint16_t *)wh->i_seq);
 572                         if ((ni->ni_flags & IEEE80211_NODE_HT) == 0 &&
 573                             (wh->i_fc[1] & IEEE80211_FC1_RETRY) &&
 574                             SEQ_LEQ(rxseq, ni->ni_rxseqs[tid])) {
 575                                 /* duplicate, discard */
 576                                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
 577                                     bssid, "duplicate",
 578                                     "seqno <%u,%u> fragno <%u,%u> tid %u",
 579                                     rxseq >> IEEE80211_SEQ_SEQ_SHIFT,
 580                                     ni->ni_rxseqs[tid] >>
 581                                         IEEE80211_SEQ_SEQ_SHIFT,
 582                                     rxseq & IEEE80211_SEQ_FRAG_MASK,
 583                                     ni->ni_rxseqs[tid] &
 584                                         IEEE80211_SEQ_FRAG_MASK,
 585                                     tid);
 586                                 vap->iv_stats.is_rx_dup++;
 587                                 IEEE80211_NODE_STAT(ni, rx_dup);
 588                                 goto out;
 589                         }
 590                         ni->ni_rxseqs[tid] = rxseq;
 591                 }
 592         }
 593
 594         switch (type) {
 595         case IEEE80211_FC0_TYPE_DATA:
 596                 hdrspace = ieee80211_hdrspace(ic, wh);
 597                 if (m->m_len < hdrspace &&
 598                     (m = m_pullup(m, hdrspace)) == NULL) {
 599                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 600                             ni->ni_macaddr, NULL,
 601                             "data too short: expecting %u", hdrspace);
 602                         vap->iv_stats.is_rx_tooshort++;
 603                         goto out;               /* XXX */
 604                 }
 605                 if (!(dir == IEEE80211_FC1_DIR_TODS ||
 606                      (dir == IEEE80211_FC1_DIR_DSTODS &&
 607                       (vap->iv_flags & IEEE80211_F_DWDS)))) {
 608                         if (dir != IEEE80211_FC1_DIR_DSTODS) {
 609                                 IEEE80211_DISCARD(vap,
 610                                     IEEE80211_MSG_INPUT, wh, "data",
 611                                     "incorrect dir 0x%x", dir);
 612                         } else {
 613                                 IEEE80211_DISCARD(vap,
 614                                     IEEE80211_MSG_INPUT |
 615                                     IEEE80211_MSG_WDS, wh,
 616                                     "4-address data",
 617                                     "%s", "DWDS not enabled");
 618                         }
 619                         vap->iv_stats.is_rx_wrongdir++;
 620                         goto out;
 621                 }
 622                 /* check if source STA is associated */
 623                 if (ni == vap->iv_bss) {
 624                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 625                             wh, "data", "%s", "unknown src");
 626                         ieee80211_send_error(ni, wh->i_addr2,
 627                             IEEE80211_FC0_SUBTYPE_DEAUTH,
 628                             IEEE80211_REASON_NOT_AUTHED);
 629                         vap->iv_stats.is_rx_notassoc++;
 630                         goto err;
 631                 }
 632                 if (ni->ni_associd == 0) {
 633                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 634                             wh, "data", "%s", "unassoc src");
 635                         IEEE80211_SEND_MGMT(ni,
 636                             IEEE80211_FC0_SUBTYPE_DISASSOC,
 637                             IEEE80211_REASON_NOT_ASSOCED);
 638                         vap->iv_stats.is_rx_notassoc++;
 639                         goto err;
 640                 }
 641
 642                 /*
 643                  * Check for power save state change.
 644                  * XXX out-of-order A-MPDU frames?
 645                  */
 646                 if (((wh->i_fc[1] & IEEE80211_FC1_PWR_MGT) ^
 647                     (ni->ni_flags & IEEE80211_NODE_PWR_MGT)))
 648                         ieee80211_node_pwrsave(ni,
 649                                 wh->i_fc[1] & IEEE80211_FC1_PWR_MGT);
 650                 /*
 651                  * For 4-address packets handle WDS discovery
 652                  * notifications.  Once a WDS link is setup frames
 653                  * are just delivered to the WDS vap (see below).
 654                  */
 655                 if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap == NULL) {
 656                         if (!ieee80211_node_is_authorized(ni)) {
 657                                 IEEE80211_DISCARD(vap,
 658                                     IEEE80211_MSG_INPUT |
 659                                     IEEE80211_MSG_WDS, wh,
 660                                     "4-address data",
 661                                     "%s", "unauthorized port");
 662                                 vap->iv_stats.is_rx_unauth++;
 663                                 IEEE80211_NODE_STAT(ni, rx_unauth);
 664                                 goto err;
 665                         }
 666                         ieee80211_dwds_discover(ni, m);
 667                         return type;
 668                 }
 669
 670                 /*
 671                  * Handle A-MPDU re-ordering.  If the frame is to be
 672                  * processed directly then ieee80211_ampdu_reorder
 673                  * will return 0; otherwise it has consumed the mbuf
 674                  * and we should do nothing more with it.
 675                  */
 676                 if ((m->m_flags & M_AMPDU) &&
 677                     ieee80211_ampdu_reorder(ni, m) != 0) {
 678                         m = NULL;
 679                         goto out;
 680                 }
 681         resubmit_ampdu:
 682
 683                 /*
 684                  * Handle privacy requirements.  Note that we
 685                  * must not be preempted from here until after
 686                  * we (potentially) call ieee80211_crypto_demic;
 687                  * otherwise we may violate assumptions in the
 688                  * crypto cipher modules used to do delayed update
 689                  * of replay sequence numbers.
 690                  */
 691                 if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
 692                         if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
 693                                 /*
 694                                  * Discard encrypted frames when privacy is off.
 695                                  */
 696                                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 697                                     wh, "WEP", "%s", "PRIVACY off");
 698                                 vap->iv_stats.is_rx_noprivacy++;
 699                                 IEEE80211_NODE_STAT(ni, rx_noprivacy);
 700                                 goto out;
 701                         }
 702                         key = ieee80211_crypto_decap(ni, m, hdrspace);
 703                         if (key == NULL) {
 704                                 /* NB: stats+msgs handled in crypto_decap */
 705                                 IEEE80211_NODE_STAT(ni, rx_wepfail);
 706                                 goto out;
 707                         }
 708                         wh = mtod(m, struct ieee80211_frame *);
 709                         wh->i_fc[1] &= ~IEEE80211_FC1_WEP;
 710                 } else {
 711                         /* XXX M_WEP and IEEE80211_F_PRIVACY */
 712                         key = NULL;
 713                 }
 714
 715                 /*
 716                  * Save QoS bits for use below--before we strip the header.
 717                  */
 718                 if (subtype == IEEE80211_FC0_SUBTYPE_QOS) {
 719                         qos = (dir == IEEE80211_FC1_DIR_DSTODS) ?
 720                             ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] :
 721                             ((struct ieee80211_qosframe *)wh)->i_qos[0];
 722                 } else
 723                         qos = 0;
 724
 725                 /*
 726                  * Next up, any fragmentation.
 727                  */
 728                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
 729                         m = ieee80211_defrag(ni, m, hdrspace);
 730                         if (m == NULL) {
 731                                 /* Fragment dropped or frame not complete yet */
 732                                 goto out;
 733                         }
 734                 }
 735                 wh = NULL;              /* no longer valid, catch any uses */
 736
 737                 /*
 738                  * Next strip any MSDU crypto bits.
 739                  */
 740                 if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) {
 741                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
 742                             ni->ni_macaddr, "data", "%s", "demic error");
 743                         vap->iv_stats.is_rx_demicfail++;
 744                         IEEE80211_NODE_STAT(ni, rx_demicfail);
 745                         goto out;
 746                 }
 747                 /* copy to listener after decrypt */
 748                 if (ieee80211_radiotap_active_vap(vap))
 749                         ieee80211_radiotap_rx(vap, m);
 750                 need_tap = 0;
 751                 /*
 752                  * Finally, strip the 802.11 header.
 753                  */
 754                 m = ieee80211_decap(vap, m, hdrspace);
 755                 if (m == NULL) {
 756                         /* XXX mask bit to check for both */
 757                         /* don't count Null data frames as errors */
 758                         if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
 759                             subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
 760                                 goto out;
 761                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
 762                             ni->ni_macaddr, "data", "%s", "decap error");
 763                         vap->iv_stats.is_rx_decap++;
 764                         IEEE80211_NODE_STAT(ni, rx_decap);
 765                         goto err;
 766                 }
 767                 eh = mtod(m, struct ether_header *);
 768                 if (!ieee80211_node_is_authorized(ni)) {
 769                         /*
 770                          * Deny any non-PAE frames received prior to
 771                          * authorization.  For open/shared-key
 772                          * authentication the port is mark authorized
 773                          * after authentication completes.  For 802.1x
 774                          * the port is not marked authorized by the
 775                          * authenticator until the handshake has completed.
 776                          */
 777                         if (eh->ether_type != htons(ETHERTYPE_PAE)) {
 778                                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
 779                                     eh->ether_shost, "data",
 780                                     "unauthorized port: ether type 0x%x len %u",
 781                                     eh->ether_type, m->m_pkthdr.len);
 782                                 vap->iv_stats.is_rx_unauth++;
 783                                 IEEE80211_NODE_STAT(ni, rx_unauth);
 784                                 goto err;
 785                         }
 786                 } else {
 787                         /*
 788                          * When denying unencrypted frames, discard
 789                          * any non-PAE frames received without encryption.
 790                          */
 791                         if ((vap->iv_flags & IEEE80211_F_DROPUNENC) &&
 792                             (key == NULL && (m->m_flags & M_WEP) == 0) &&
 793                             eh->ether_type != htons(ETHERTYPE_PAE)) {
 794                                 /*
 795                                  * Drop unencrypted frames.
 796                                  */
 797                                 vap->iv_stats.is_rx_unencrypted++;
 798                                 IEEE80211_NODE_STAT(ni, rx_unencrypted);
 799                                 goto out;
 800                         }
 801                 }
 802                 /* XXX require HT? */
 803                 if (qos & IEEE80211_QOS_AMSDU) {
 804                         m = ieee80211_decap_amsdu(ni, m);
 805                         if (m == NULL)
 806                                 return IEEE80211_FC0_TYPE_DATA;
 807                 } else {
 808 #ifdef IEEE80211_SUPPORT_SUPERG
 809                         m = ieee80211_decap_fastframe(vap, ni, m);
 810                         if (m == NULL)
 811                                 return IEEE80211_FC0_TYPE_DATA;
 812 #endif
 813                 }
 814                 if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap != NULL)
 815                         ieee80211_deliver_data(ni->ni_wdsvap, ni, m);
 816                 else
 817                         hostap_deliver_data(vap, ni, m);
 818                 return IEEE80211_FC0_TYPE_DATA;
 819
 820         case IEEE80211_FC0_TYPE_MGT:
 821                 vap->iv_stats.is_rx_mgmt++;
 822                 IEEE80211_NODE_STAT(ni, rx_mgmt);
 823                 if (dir != IEEE80211_FC1_DIR_NODS) {
 824                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 825                             wh, "mgt", "incorrect dir 0x%x", dir);
 826                         vap->iv_stats.is_rx_wrongdir++;
 827                         goto err;
 828                 }
 829                 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
 830                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 831                             ni->ni_macaddr, "mgt", "too short: len %u",
 832                             m->m_pkthdr.len);
 833                         vap->iv_stats.is_rx_tooshort++;
 834                         goto out;
 835                 }
 836                 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
 837                         /* ensure return frames are unicast */
 838                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
 839                             wh, NULL, "source is multicast: %6D",
 840                             wh->i_addr2, ":");
 841                         vap->iv_stats.is_rx_mgtdiscard++;       /* XXX stat */
 842                         goto out;
 843                 }
 844 #ifdef IEEE80211_DEBUG
 845                 if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) ||
 846                     ieee80211_msg_dumppkts(vap)) {
 847                         if_printf(ifp, "received %s from %6D rssi %d\n",
 848                             ieee80211_mgt_subtype_name[subtype >>
 849                                 IEEE80211_FC0_SUBTYPE_SHIFT],
 850                             wh->i_addr2, ":", rssi);
 851                 }
 852 #endif
 853                 if (wh->i_fc[1] & IEEE80211_FC1_WEP) {
 854                         if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) {
 855                                 /*
 856                                  * Only shared key auth frames with a challenge
 857                                  * should be encrypted, discard all others.
 858                                  */
 859                                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 860                                     wh, NULL,
 861                                     "%s", "WEP set but not permitted");
 862                                 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
 863                                 goto out;
 864                         }
 865                         if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
 866                                 /*
 867                                  * Discard encrypted frames when privacy is off.
 868                                  */
 869                                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 870                                     wh, NULL, "%s", "WEP set but PRIVACY off");
 871                                 vap->iv_stats.is_rx_noprivacy++;
 872                                 goto out;
 873                         }
 874                         hdrspace = ieee80211_hdrspace(ic, wh);
 875                         key = ieee80211_crypto_decap(ni, m, hdrspace);
 876                         if (key == NULL) {
 877                                 /* NB: stats+msgs handled in crypto_decap */
 878                                 goto out;
 879                         }
 880                         wh = mtod(m, struct ieee80211_frame *);
 881                         wh->i_fc[1] &= ~IEEE80211_FC1_WEP;
 882                 }
 883                 vap->iv_recv_mgmt(ni, m, subtype, rssi, nf);
 884                 goto out;
 885
 886         case IEEE80211_FC0_TYPE_CTL:
 887                 vap->iv_stats.is_rx_ctl++;
 888                 IEEE80211_NODE_STAT(ni, rx_ctrl);
 889                 vap->iv_recv_ctl(ni, m, subtype);
 890                 goto out;
 891         default:
 892                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
 893                     wh, "bad", "frame type 0x%x", type);
 894                 /* should not come here */
 895                 break;
 896         }
 897 err:
 898         ifp->if_ierrors++;
 899 out:
 900         if (m != NULL) {
 901                 if (need_tap && ieee80211_radiotap_active_vap(vap))
 902                         ieee80211_radiotap_rx(vap, m);
 903                 m_freem(m);
 904         }
 905         return type;
 906 #undef SEQ_LEQ
 907 }
 908
 909 static void
 910 hostap_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh,
 911     int rssi, int nf, uint16_t seq, uint16_t status)
 912 {
 913         struct ieee80211vap *vap = ni->ni_vap;
 914
 915         KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state));
 916
 917         if (ni->ni_authmode == IEEE80211_AUTH_SHARED) {
 918                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
 919                     ni->ni_macaddr, "open auth",
 920                     "bad sta auth mode %u", ni->ni_authmode);
 921                 vap->iv_stats.is_rx_bad_auth++; /* XXX */
 922                 /*
 923                  * Clear any challenge text that may be there if
 924                  * a previous shared key auth failed and then an
 925                  * open auth is attempted.
 926                  */
 927                 if (ni->ni_challenge != NULL) {
 928                         kfree(ni->ni_challenge, M_80211_NODE);
 929                         ni->ni_challenge = NULL;
 930                 }
 931                 /* XXX hack to workaround calling convention */
 932                 ieee80211_send_error(ni, wh->i_addr2,
 933                     IEEE80211_FC0_SUBTYPE_AUTH,
 934                     (seq + 1) | (IEEE80211_STATUS_ALG<<16));
 935                 return;
 936         }
 937         if (seq != IEEE80211_AUTH_OPEN_REQUEST) {
 938                 vap->iv_stats.is_rx_bad_auth++;
 939                 return;
 940         }
 941         /* always accept open authentication requests */
 942         if (ni == vap->iv_bss) {
 943                 ni = ieee80211_dup_bss(vap, wh->i_addr2);
 944                 if (ni == NULL)
 945                         return;
 946         } else if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0)
 947                 (void) ieee80211_ref_node(ni);
 948         /*
 949          * Mark the node as referenced to reflect that it's
 950          * reference count has been bumped to insure it remains
 951          * after the transaction completes.
 952          */
 953         ni->ni_flags |= IEEE80211_NODE_AREF;
 954         /*
 955          * Mark the node as requiring a valid association id
 956          * before outbound traffic is permitted.
 957          */
 958         ni->ni_flags |= IEEE80211_NODE_ASSOCID;
 959
 960         if (vap->iv_acl != NULL &&
 961             vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) {
 962                 /*
 963                  * When the ACL policy is set to RADIUS we defer the
 964                  * authorization to a user agent.  Dispatch an event,
 965                  * a subsequent MLME call will decide the fate of the
 966                  * station.  If the user agent is not present then the
 967                  * node will be reclaimed due to inactivity.
 968                  */
 969                 IEEE80211_NOTE_MAC(vap,
 970                     IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL, ni->ni_macaddr,
 971                     "%s", "station authentication defered (radius acl)");
 972                 ieee80211_notify_node_auth(ni);
 973         } else {
 974                 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1);
 975                 IEEE80211_NOTE_MAC(vap,
 976                     IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, ni->ni_macaddr,
 977                     "%s", "station authenticated (open)");
 978                 /*
 979                  * When 802.1x is not in use mark the port
 980                  * authorized at this point so traffic can flow.
 981                  */
 982                 if (ni->ni_authmode != IEEE80211_AUTH_8021X)
 983                         ieee80211_node_authorize(ni);
 984         }
 985 }
 986
 987 static void
 988 hostap_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh,
 989     uint8_t *frm, uint8_t *efrm, int rssi, int nf,
 990     uint16_t seq, uint16_t status)
 991 {
 992         struct ieee80211vap *vap = ni->ni_vap;
 993         uint8_t *challenge;
 994         int allocbs, estatus;
 995
 996         KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state));
 997
 998         /*
 999          * NB: this can happen as we allow pre-shared key
1000          * authentication to be enabled w/o wep being turned
1001          * on so that configuration of these can be done
1002          * in any order.  It may be better to enforce the
1003          * ordering in which case this check would just be
1004          * for sanity/consistency.
1005          */
1006         if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
1007                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1008                     ni->ni_macaddr, "shared key auth",
1009                     "%s", " PRIVACY is disabled");
1010                 estatus = IEEE80211_STATUS_ALG;
1011                 goto bad;
1012         }
1013         /*
1014          * Pre-shared key authentication is evil; accept
1015          * it only if explicitly configured (it is supported
1016          * mainly for compatibility with clients like Mac OS X).
1017          */
1018         if (ni->ni_authmode != IEEE80211_AUTH_AUTO &&
1019             ni->ni_authmode != IEEE80211_AUTH_SHARED) {
1020                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1021                     ni->ni_macaddr, "shared key auth",
1022                     "bad sta auth mode %u", ni->ni_authmode);
1023                 vap->iv_stats.is_rx_bad_auth++; /* XXX maybe a unique error? */
1024                 estatus = IEEE80211_STATUS_ALG;
1025                 goto bad;
1026         }
1027
1028         challenge = NULL;
1029         if (frm + 1 < efrm) {
1030                 if ((frm[1] + 2) > (efrm - frm)) {
1031                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1032                             ni->ni_macaddr, "shared key auth",
1033                             "ie %d/%d too long",
1034                             frm[0], (int)((frm[1] + 2) - (efrm - frm)));
1035                         vap->iv_stats.is_rx_bad_auth++;
1036                         estatus = IEEE80211_STATUS_CHALLENGE;
1037                         goto bad;
1038                 }
1039                 if (*frm == IEEE80211_ELEMID_CHALLENGE)
1040                         challenge = frm;
1041                 frm += frm[1] + 2;
1042         }
1043         switch (seq) {
1044         case IEEE80211_AUTH_SHARED_CHALLENGE:
1045         case IEEE80211_AUTH_SHARED_RESPONSE:
1046                 if (challenge == NULL) {
1047                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1048                             ni->ni_macaddr, "shared key auth",
1049                             "%s", "no challenge");
1050                         vap->iv_stats.is_rx_bad_auth++;
1051                         estatus = IEEE80211_STATUS_CHALLENGE;
1052                         goto bad;
1053                 }
1054                 if (challenge[1] != IEEE80211_CHALLENGE_LEN) {
1055                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1056                             ni->ni_macaddr, "shared key auth",
1057                             "bad challenge len %d", challenge[1]);
1058                         vap->iv_stats.is_rx_bad_auth++;
1059                         estatus = IEEE80211_STATUS_CHALLENGE;
1060                         goto bad;
1061                 }
1062         default:
1063                 break;
1064         }
1065         switch (seq) {
1066         case IEEE80211_AUTH_SHARED_REQUEST:
1067                 if (ni == vap->iv_bss) {
1068                         ni = ieee80211_dup_bss(vap, wh->i_addr2);
1069                         if (ni == NULL) {
1070                                 /* NB: no way to return an error */
1071                                 return;
1072                         }
1073                         allocbs = 1;
1074                 } else {
1075                         if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0)
1076                                 (void) ieee80211_ref_node(ni);
1077                         allocbs = 0;
1078                 }
1079                 /*
1080                  * Mark the node as referenced to reflect that it's
1081                  * reference count has been bumped to insure it remains
1082                  * after the transaction completes.
1083                  */
1084                 ni->ni_flags |= IEEE80211_NODE_AREF;
1085                 /*
1086                  * Mark the node as requiring a valid associatio id
1087                  * before outbound traffic is permitted.
1088                  */
1089                 ni->ni_flags |= IEEE80211_NODE_ASSOCID;
1090                 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
1091                 ni->ni_noise = nf;
1092                 if (!ieee80211_alloc_challenge(ni)) {
1093                         /* NB: don't return error so they rexmit */
1094                         return;
1095                 }
1096                 get_random_bytes(ni->ni_challenge,
1097                         IEEE80211_CHALLENGE_LEN);
1098                 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH,
1099                     ni, "shared key %sauth request", allocbs ? "" : "re");
1100                 /*
1101                  * When the ACL policy is set to RADIUS we defer the
1102                  * authorization to a user agent.  Dispatch an event,
1103                  * a subsequent MLME call will decide the fate of the
1104                  * station.  If the user agent is not present then the
1105                  * node will be reclaimed due to inactivity.
1106                  */
1107                 if (vap->iv_acl != NULL &&
1108                     vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) {
1109                         IEEE80211_NOTE_MAC(vap,
1110                             IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL,
1111                             ni->ni_macaddr,
1112                             "%s", "station authentication defered (radius acl)");
1113                         ieee80211_notify_node_auth(ni);
1114                         return;
1115                 }
1116                 break;
1117         case IEEE80211_AUTH_SHARED_RESPONSE:
1118                 if (ni == vap->iv_bss) {
1119                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1120                             ni->ni_macaddr, "shared key response",
1121                             "%s", "unknown station");
1122                         /* NB: don't send a response */
1123                         return;
1124                 }
1125                 if (ni->ni_challenge == NULL) {
1126                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1127                             ni->ni_macaddr, "shared key response",
1128                             "%s", "no challenge recorded");
1129                         vap->iv_stats.is_rx_bad_auth++;
1130                         estatus = IEEE80211_STATUS_CHALLENGE;
1131                         goto bad;
1132                 }
1133                 if (memcmp(ni->ni_challenge, &challenge[2],
1134                            challenge[1]) != 0) {
1135                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1136                             ni->ni_macaddr, "shared key response",
1137                             "%s", "challenge mismatch");
1138                         vap->iv_stats.is_rx_auth_fail++;
1139                         estatus = IEEE80211_STATUS_CHALLENGE;
1140                         goto bad;
1141                 }
1142                 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH,
1143                     ni, "%s", "station authenticated (shared key)");
1144                 ieee80211_node_authorize(ni);
1145                 break;
1146         default:
1147                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1148                     ni->ni_macaddr, "shared key auth",
1149                     "bad seq %d", seq);
1150                 vap->iv_stats.is_rx_bad_auth++;
1151                 estatus = IEEE80211_STATUS_SEQUENCE;
1152                 goto bad;
1153         }
1154         IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1);
1155         return;
1156 bad:
1157         /*
1158          * Send an error response; but only when operating as an AP.
1159          */
1160         /* XXX hack to workaround calling convention */
1161         ieee80211_send_error(ni, wh->i_addr2,
1162             IEEE80211_FC0_SUBTYPE_AUTH,
1163             (seq + 1) | (estatus<<16));
1164 }
1165
1166 /*
1167  * Convert a WPA cipher selector OUI to an internal
1168  * cipher algorithm.  Where appropriate we also
1169  * record any key length.
1170  */
1171 static int
1172 wpa_cipher(const uint8_t *sel, uint8_t *keylen)
1173 {
1174 #define WPA_SEL(x)      (((x)<<24)|WPA_OUI)
1175         uint32_t w = LE_READ_4(sel);
1176
1177         switch (w) {
1178         case WPA_SEL(WPA_CSE_NULL):
1179                 return IEEE80211_CIPHER_NONE;
1180         case WPA_SEL(WPA_CSE_WEP40):
1181                 if (keylen)
1182                         *keylen = 40 / NBBY;
1183                 return IEEE80211_CIPHER_WEP;
1184         case WPA_SEL(WPA_CSE_WEP104):
1185                 if (keylen)
1186                         *keylen = 104 / NBBY;
1187                 return IEEE80211_CIPHER_WEP;
1188         case WPA_SEL(WPA_CSE_TKIP):
1189                 return IEEE80211_CIPHER_TKIP;
1190         case WPA_SEL(WPA_CSE_CCMP):
1191                 return IEEE80211_CIPHER_AES_CCM;
1192         }
1193         return 32;              /* NB: so 1<< is discarded */
1194 #undef WPA_SEL
1195 }
1196
1197 /*
1198  * Convert a WPA key management/authentication algorithm
1199  * to an internal code.
1200  */
1201 static int
1202 wpa_keymgmt(const uint8_t *sel)
1203 {
1204 #define WPA_SEL(x)      (((x)<<24)|WPA_OUI)
1205         uint32_t w = LE_READ_4(sel);
1206
1207         switch (w) {
1208         case WPA_SEL(WPA_ASE_8021X_UNSPEC):
1209                 return WPA_ASE_8021X_UNSPEC;
1210         case WPA_SEL(WPA_ASE_8021X_PSK):
1211                 return WPA_ASE_8021X_PSK;
1212         case WPA_SEL(WPA_ASE_NONE):
1213                 return WPA_ASE_NONE;
1214         }
1215         return 0;               /* NB: so is discarded */
1216 #undef WPA_SEL
1217 }
1218
1219 /*
1220  * Parse a WPA information element to collect parameters.
1221  * Note that we do not validate security parameters; that
1222  * is handled by the authenticator; the parsing done here
1223  * is just for internal use in making operational decisions.
1224  */
1225 static int
1226 ieee80211_parse_wpa(struct ieee80211vap *vap, const uint8_t *frm,
1227         struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh)
1228 {
1229         uint8_t len = frm[1];
1230         uint32_t w;
1231         int n;
1232
1233         /*
1234          * Check the length once for fixed parts: OUI, type,
1235          * version, mcast cipher, and 2 selector counts.
1236          * Other, variable-length data, must be checked separately.
1237          */
1238         if ((vap->iv_flags & IEEE80211_F_WPA1) == 0) {
1239                 IEEE80211_DISCARD_IE(vap,
1240                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1241                     wh, "WPA", "not WPA, flags 0x%x", vap->iv_flags);
1242                 return IEEE80211_REASON_IE_INVALID;
1243         }
1244         if (len < 14) {
1245                 IEEE80211_DISCARD_IE(vap,
1246                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1247                     wh, "WPA", "too short, len %u", len);
1248                 return IEEE80211_REASON_IE_INVALID;
1249         }
1250         frm += 6, len -= 4;             /* NB: len is payload only */
1251         /* NB: iswpaoui already validated the OUI and type */
1252         w = LE_READ_2(frm);
1253         if (w != WPA_VERSION) {
1254                 IEEE80211_DISCARD_IE(vap,
1255                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1256                     wh, "WPA", "bad version %u", w);
1257                 return IEEE80211_REASON_IE_INVALID;
1258         }
1259         frm += 2, len -= 2;
1260
1261         memset(rsn, 0, sizeof(*rsn));
1262
1263         /* multicast/group cipher */
1264         rsn->rsn_mcastcipher = wpa_cipher(frm, &rsn->rsn_mcastkeylen);
1265         frm += 4, len -= 4;
1266
1267         /* unicast ciphers */
1268         n = LE_READ_2(frm);
1269         frm += 2, len -= 2;
1270         if (len < n*4+2) {
1271                 IEEE80211_DISCARD_IE(vap,
1272                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1273                     wh, "WPA", "ucast cipher data too short; len %u, n %u",
1274                     len, n);
1275                 return IEEE80211_REASON_IE_INVALID;
1276         }
1277         w = 0;
1278         for (; n > 0; n--) {
1279                 w |= 1<<wpa_cipher(frm, &rsn->rsn_ucastkeylen);
1280                 frm += 4, len -= 4;
1281         }
1282         if (w & (1<<IEEE80211_CIPHER_TKIP))
1283                 rsn->rsn_ucastcipher = IEEE80211_CIPHER_TKIP;
1284         else
1285                 rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM;
1286
1287         /* key management algorithms */
1288         n = LE_READ_2(frm);
1289         frm += 2, len -= 2;
1290         if (len < n*4) {
1291                 IEEE80211_DISCARD_IE(vap,
1292                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1293                     wh, "WPA", "key mgmt alg data too short; len %u, n %u",
1294                     len, n);
1295                 return IEEE80211_REASON_IE_INVALID;
1296         }
1297         w = 0;
1298         for (; n > 0; n--) {
1299                 w |= wpa_keymgmt(frm);
1300                 frm += 4, len -= 4;
1301         }
1302         if (w & WPA_ASE_8021X_UNSPEC)
1303                 rsn->rsn_keymgmt = WPA_ASE_8021X_UNSPEC;
1304         else
1305                 rsn->rsn_keymgmt = WPA_ASE_8021X_PSK;
1306
1307         if (len > 2)            /* optional capabilities */
1308                 rsn->rsn_caps = LE_READ_2(frm);
1309
1310         return 0;
1311 }
1312
1313 /*
1314  * Convert an RSN cipher selector OUI to an internal
1315  * cipher algorithm.  Where appropriate we also
1316  * record any key length.
1317  */
1318 static int
1319 rsn_cipher(const uint8_t *sel, uint8_t *keylen)
1320 {
1321 #define RSN_SEL(x)      (((x)<<24)|RSN_OUI)
1322         uint32_t w = LE_READ_4(sel);
1323
1324         switch (w) {
1325         case RSN_SEL(RSN_CSE_NULL):
1326                 return IEEE80211_CIPHER_NONE;
1327         case RSN_SEL(RSN_CSE_WEP40):
1328                 if (keylen)
1329                         *keylen = 40 / NBBY;
1330                 return IEEE80211_CIPHER_WEP;
1331         case RSN_SEL(RSN_CSE_WEP104):
1332                 if (keylen)
1333                         *keylen = 104 / NBBY;
1334                 return IEEE80211_CIPHER_WEP;
1335         case RSN_SEL(RSN_CSE_TKIP):
1336                 return IEEE80211_CIPHER_TKIP;
1337         case RSN_SEL(RSN_CSE_CCMP):
1338                 return IEEE80211_CIPHER_AES_CCM;
1339         case RSN_SEL(RSN_CSE_WRAP):
1340                 return IEEE80211_CIPHER_AES_OCB;
1341         }
1342         return 32;              /* NB: so 1<< is discarded */
1343 #undef WPA_SEL
1344 }
1345
1346 /*
1347  * Convert an RSN key management/authentication algorithm
1348  * to an internal code.
1349  */
1350 static int
1351 rsn_keymgmt(const uint8_t *sel)
1352 {
1353 #define RSN_SEL(x)      (((x)<<24)|RSN_OUI)
1354         uint32_t w = LE_READ_4(sel);
1355
1356         switch (w) {
1357         case RSN_SEL(RSN_ASE_8021X_UNSPEC):
1358                 return RSN_ASE_8021X_UNSPEC;
1359         case RSN_SEL(RSN_ASE_8021X_PSK):
1360                 return RSN_ASE_8021X_PSK;
1361         case RSN_SEL(RSN_ASE_NONE):
1362                 return RSN_ASE_NONE;
1363         }
1364         return 0;               /* NB: so is discarded */
1365 #undef RSN_SEL
1366 }
1367
1368 /*
1369  * Parse a WPA/RSN information element to collect parameters
1370  * and validate the parameters against what has been
1371  * configured for the system.
1372  */
1373 static int
1374 ieee80211_parse_rsn(struct ieee80211vap *vap, const uint8_t *frm,
1375         struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh)
1376 {
1377         uint8_t len = frm[1];
1378         uint32_t w;
1379         int n;
1380
1381         /*
1382          * Check the length once for fixed parts:
1383          * version, mcast cipher, and 2 selector counts.
1384          * Other, variable-length data, must be checked separately.
1385          */
1386         if ((vap->iv_flags & IEEE80211_F_WPA2) == 0) {
1387                 IEEE80211_DISCARD_IE(vap,
1388                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1389                     wh, "WPA", "not RSN, flags 0x%x", vap->iv_flags);
1390                 return IEEE80211_REASON_IE_INVALID;
1391         }
1392         if (len < 10) {
1393                 IEEE80211_DISCARD_IE(vap,
1394                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1395                     wh, "RSN", "too short, len %u", len);
1396                 return IEEE80211_REASON_IE_INVALID;
1397         }
1398         frm += 2;
1399         w = LE_READ_2(frm);
1400         if (w != RSN_VERSION) {
1401                 IEEE80211_DISCARD_IE(vap,
1402                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1403                     wh, "RSN", "bad version %u", w);
1404                 return IEEE80211_REASON_IE_INVALID;
1405         }
1406         frm += 2, len -= 2;
1407
1408         memset(rsn, 0, sizeof(*rsn));
1409
1410         /* multicast/group cipher */
1411         rsn->rsn_mcastcipher = rsn_cipher(frm, &rsn->rsn_mcastkeylen);
1412         frm += 4, len -= 4;
1413
1414         /* unicast ciphers */
1415         n = LE_READ_2(frm);
1416         frm += 2, len -= 2;
1417         if (len < n*4+2) {
1418                 IEEE80211_DISCARD_IE(vap,
1419                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1420                     wh, "RSN", "ucast cipher data too short; len %u, n %u",
1421                     len, n);
1422                 return IEEE80211_REASON_IE_INVALID;
1423         }
1424         w = 0;
1425         for (; n > 0; n--) {
1426                 w |= 1<<rsn_cipher(frm, &rsn->rsn_ucastkeylen);
1427                 frm += 4, len -= 4;
1428         }
1429         if (w & (1<<IEEE80211_CIPHER_TKIP))
1430                 rsn->rsn_ucastcipher = IEEE80211_CIPHER_TKIP;
1431         else
1432                 rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM;
1433
1434         /* key management algorithms */
1435         n = LE_READ_2(frm);
1436         frm += 2, len -= 2;
1437         if (len < n*4) {
1438                 IEEE80211_DISCARD_IE(vap,
1439                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1440                     wh, "RSN", "key mgmt alg data too short; len %u, n %u",
1441                     len, n);
1442                 return IEEE80211_REASON_IE_INVALID;
1443         }
1444         w = 0;
1445         for (; n > 0; n--) {
1446                 w |= rsn_keymgmt(frm);
1447                 frm += 4, len -= 4;
1448         }
1449         if (w & RSN_ASE_8021X_UNSPEC)
1450                 rsn->rsn_keymgmt = RSN_ASE_8021X_UNSPEC;
1451         else
1452                 rsn->rsn_keymgmt = RSN_ASE_8021X_PSK;
1453
1454         /* optional RSN capabilities */
1455         if (len > 2)
1456                 rsn->rsn_caps = LE_READ_2(frm);
1457         /* XXXPMKID */
1458
1459         return 0;
1460 }
1461
1462 /*
1463  * WPA/802.11i assocation request processing.
1464  */
1465 static int
1466 wpa_assocreq(struct ieee80211_node *ni, struct ieee80211_rsnparms *rsnparms,
1467         const struct ieee80211_frame *wh, const uint8_t *wpa,
1468         const uint8_t *rsn, uint16_t capinfo)
1469 {
1470         struct ieee80211vap *vap = ni->ni_vap;
1471         uint8_t reason;
1472         int badwparsn;
1473
1474         ni->ni_flags &= ~(IEEE80211_NODE_WPS|IEEE80211_NODE_TSN);
1475         if (wpa == NULL && rsn == NULL) {
1476                 if (vap->iv_flags_ext & IEEE80211_FEXT_WPS) {
1477                         /*
1478                          * W-Fi Protected Setup (WPS) permits
1479                          * clients to associate and pass EAPOL frames
1480                          * to establish initial credentials.
1481                          */
1482                         ni->ni_flags |= IEEE80211_NODE_WPS;
1483                         return 1;
1484                 }
1485                 if ((vap->iv_flags_ext & IEEE80211_FEXT_TSN) &&
1486                     (capinfo & IEEE80211_CAPINFO_PRIVACY)) {
1487                         /*
1488                          * Transitional Security Network.  Permits clients
1489                          * to associate and use WEP while WPA is configured.
1490                          */
1491                         ni->ni_flags |= IEEE80211_NODE_TSN;
1492                         return 1;
1493                 }
1494                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA,
1495                     wh, NULL, "%s", "no WPA/RSN IE in association request");
1496                 vap->iv_stats.is_rx_assoc_badwpaie++;
1497                 reason = IEEE80211_REASON_IE_INVALID;
1498                 goto bad;
1499         }
1500         /* assert right association security credentials */
1501         badwparsn = 0;                  /* NB: to silence compiler */
1502         switch (vap->iv_flags & IEEE80211_F_WPA) {
1503         case IEEE80211_F_WPA1:
1504                 badwparsn = (wpa == NULL);
1505                 break;
1506         case IEEE80211_F_WPA2:
1507                 badwparsn = (rsn == NULL);
1508                 break;
1509         case IEEE80211_F_WPA1|IEEE80211_F_WPA2:
1510                 badwparsn = (wpa == NULL && rsn == NULL);
1511                 break;
1512         }
1513         if (badwparsn) {
1514                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA,
1515                     wh, NULL,
1516                     "%s", "missing WPA/RSN IE in association request");
1517                 vap->iv_stats.is_rx_assoc_badwpaie++;
1518                 reason = IEEE80211_REASON_IE_INVALID;
1519                 goto bad;
1520         }
1521         /*
1522          * Parse WPA/RSN information element.
1523          */
1524         if (wpa != NULL)
1525                 reason = ieee80211_parse_wpa(vap, wpa, rsnparms, wh);
1526         else
1527                 reason = ieee80211_parse_rsn(vap, rsn, rsnparms, wh);
1528         if (reason != 0) {
1529                 /* XXX distinguish WPA/RSN? */
1530                 vap->iv_stats.is_rx_assoc_badwpaie++;
1531                 goto bad;
1532         }
1533         IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA, ni,
1534             "%s ie: mc %u/%u uc %u/%u key %u caps 0x%x",
1535             wpa != NULL ? "WPA" : "RSN",
1536             rsnparms->rsn_mcastcipher, rsnparms->rsn_mcastkeylen,
1537             rsnparms->rsn_ucastcipher, rsnparms->rsn_ucastkeylen,
1538             rsnparms->rsn_keymgmt, rsnparms->rsn_caps);
1539
1540         return 1;
1541 bad:
1542         ieee80211_node_deauth(ni, reason);
1543         return 0;
1544 }
1545
1546 /* XXX find a better place for definition */
1547 struct l2_update_frame {
1548         struct ether_header eh;
1549         uint8_t dsap;
1550         uint8_t ssap;
1551         uint8_t control;
1552         uint8_t xid[3];
1553 }  __packed;
1554
1555 /*
1556  * Deliver a TGf L2UF frame on behalf of a station.
1557  * This primes any bridge when the station is roaming
1558  * between ap's on the same wired network.
1559  */
1560 static void
1561 ieee80211_deliver_l2uf(struct ieee80211_node *ni)
1562 {
1563         struct ieee80211vap *vap = ni->ni_vap;
1564         struct ifnet *ifp = vap->iv_ifp;
1565         struct mbuf *m;
1566         struct l2_update_frame *l2uf;
1567         struct ether_header *eh;
1568
1569         m = m_gethdr(MB_DONTWAIT, MT_DATA);
1570         if (m == NULL) {
1571                 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni,
1572                     "%s", "no mbuf for l2uf frame");
1573                 vap->iv_stats.is_rx_nobuf++;    /* XXX not right */
1574                 return;
1575         }
1576         l2uf = mtod(m, struct l2_update_frame *);
1577         eh = &l2uf->eh;
1578         /* dst: Broadcast address */
1579         IEEE80211_ADDR_COPY(eh->ether_dhost, ifp->if_broadcastaddr);
1580         /* src: associated STA */
1581         IEEE80211_ADDR_COPY(eh->ether_shost, ni->ni_macaddr);
1582         eh->ether_type = htons(sizeof(*l2uf) - sizeof(*eh));
1583
1584         l2uf->dsap = 0;
1585         l2uf->ssap = 0;
1586         l2uf->control = 0xf5;
1587         l2uf->xid[0] = 0x81;
1588         l2uf->xid[1] = 0x80;
1589         l2uf->xid[2] = 0x00;
1590
1591         m->m_pkthdr.len = m->m_len = sizeof(*l2uf);
1592         hostap_deliver_data(vap, ni, m);
1593 }
1594
1595 static void
1596 ratesetmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
1597         int reassoc, int resp, const char *tag, int rate)
1598 {
1599         IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2,
1600             "deny %s request, %s rate set mismatch, rate/MCS %d",
1601             reassoc ? "reassoc" : "assoc", tag, rate & IEEE80211_RATE_VAL);
1602         IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_BASIC_RATE);
1603         ieee80211_node_leave(ni);
1604 }
1605
1606 static void
1607 capinfomismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
1608         int reassoc, int resp, const char *tag, int capinfo)
1609 {
1610         struct ieee80211vap *vap = ni->ni_vap;
1611
1612         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2,
1613             "deny %s request, %s mismatch 0x%x",
1614             reassoc ? "reassoc" : "assoc", tag, capinfo);
1615         IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_CAPINFO);
1616         ieee80211_node_leave(ni);
1617         vap->iv_stats.is_rx_assoc_capmismatch++;
1618 }
1619
1620 static void
1621 htcapmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
1622         int reassoc, int resp)
1623 {
1624         IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2,
1625             "deny %s request, missing HT ie", reassoc ? "reassoc" : "assoc");
1626         /* XXX no better code */
1627         IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_MISSING_HT_CAPS);
1628         ieee80211_node_leave(ni);
1629 }
1630
1631 static void
1632 authalgreject(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
1633         int algo, int seq, int status)
1634 {
1635         struct ieee80211vap *vap = ni->ni_vap;
1636
1637         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1638             wh, NULL, "unsupported alg %d", algo);
1639         vap->iv_stats.is_rx_auth_unsupported++;
1640         ieee80211_send_error(ni, wh->i_addr2, IEEE80211_FC0_SUBTYPE_AUTH,
1641             seq | (status << 16));
1642 }
1643
1644 static __inline int
1645 ishtmixed(const uint8_t *ie)
1646 {
1647         const struct ieee80211_ie_htinfo *ht =
1648             (const struct ieee80211_ie_htinfo *) ie;
1649         return (ht->hi_byte2 & IEEE80211_HTINFO_OPMODE) ==
1650             IEEE80211_HTINFO_OPMODE_MIXED;
1651 }
1652
1653 static int
1654 is11bclient(const uint8_t *rates, const uint8_t *xrates)
1655 {
1656         static const uint32_t brates = (1<<2*1)|(1<<2*2)|(1<<11)|(1<<2*11);
1657         int i;
1658
1659         /* NB: the 11b clients we care about will not have xrates */
1660         if (xrates != NULL || rates == NULL)
1661                 return 0;
1662         for (i = 0; i < rates[1]; i++) {
1663                 int r = rates[2+i] & IEEE80211_RATE_VAL;
1664                 if (r > 2*11 || ((1<<r) & brates) == 0)
1665                         return 0;
1666         }
1667         return 1;
1668 }
1669
1670 static void
1671 hostap_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0,
1672         int subtype, int rssi, int nf)
1673 {
1674         struct ieee80211vap *vap = ni->ni_vap;
1675         struct ieee80211com *ic = ni->ni_ic;
1676         struct ieee80211_frame *wh;
1677         uint8_t *frm, *efrm, *sfrm;
1678         uint8_t *ssid, *rates, *xrates, *wpa, *rsn, *wme, *ath, *htcap;
1679         int reassoc, resp;
1680         uint8_t rate;
1681
1682         wh = mtod(m0, struct ieee80211_frame *);
1683         frm = (uint8_t *)&wh[1];
1684         efrm = mtod(m0, uint8_t *) + m0->m_len;
1685         switch (subtype) {
1686         case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
1687         case IEEE80211_FC0_SUBTYPE_BEACON: {
1688                 struct ieee80211_scanparams scan;
1689                 /*
1690                  * We process beacon/probe response frames when scanning;
1691                  * otherwise we check beacon frames for overlapping non-ERP
1692                  * BSS in 11g and/or overlapping legacy BSS when in HT.
1693                  */
1694                 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0 &&
1695                     subtype == IEEE80211_FC0_SUBTYPE_PROBE_RESP) {
1696                         vap->iv_stats.is_rx_mgtdiscard++;
1697                         return;
1698                 }
1699                 /* NB: accept off-channel frames */
1700                 if (ieee80211_parse_beacon(ni, m0, &scan) &~ IEEE80211_BPARSE_OFFCHAN)
1701                         return;
1702                 /*
1703                  * Count frame now that we know it's to be processed.
1704                  */
1705                 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
1706                         vap->iv_stats.is_rx_beacon++;           /* XXX remove */
1707                         IEEE80211_NODE_STAT(ni, rx_beacons);
1708                 } else
1709                         IEEE80211_NODE_STAT(ni, rx_proberesp);
1710                 /*
1711                  * If scanning, just pass information to the scan module.
1712                  */
1713                 if (ic->ic_flags & IEEE80211_F_SCAN) {
1714                         if (scan.status == 0 &&         /* NB: on channel */
1715                             (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN)) {
1716                                 /*
1717                                  * Actively scanning a channel marked passive;
1718                                  * send a probe request now that we know there
1719                                  * is 802.11 traffic present.
1720                                  *
1721                                  * XXX check if the beacon we recv'd gives
1722                                  * us what we need and suppress the probe req
1723                                  */
1724                                 ieee80211_probe_curchan(vap, 1);
1725                                 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
1726                         }
1727                         ieee80211_add_scan(vap, &scan, wh, subtype, rssi, nf);
1728                         return;
1729                 }
1730                 /*
1731                  * Check beacon for overlapping bss w/ non ERP stations.
1732                  * If we detect one and protection is configured but not
1733                  * enabled, enable it and start a timer that'll bring us
1734                  * out if we stop seeing the bss.
1735                  */
1736                 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) &&
1737                     scan.status == 0 &&                 /* NB: on-channel */
1738                     ((scan.erp & 0x100) == 0 ||         /* NB: no ERP, 11b sta*/
1739                      (scan.erp & IEEE80211_ERP_NON_ERP_PRESENT))) {
1740                         ic->ic_lastnonerp = ticks;
1741                         ic->ic_flags_ext |= IEEE80211_FEXT_NONERP_PR;
1742                         if (ic->ic_protmode != IEEE80211_PROT_NONE &&
1743                             (ic->ic_flags & IEEE80211_F_USEPROT) == 0) {
1744                                 IEEE80211_NOTE_FRAME(vap,
1745                                     IEEE80211_MSG_ASSOC, wh,
1746                                     "non-ERP present on channel %d "
1747                                     "(saw erp 0x%x from channel %d), "
1748                                     "enable use of protection",
1749                                     ic->ic_curchan->ic_ieee,
1750                                     scan.erp, scan.chan);
1751                                 ic->ic_flags |= IEEE80211_F_USEPROT;
1752                                 ieee80211_notify_erp(ic);
1753                         }
1754                 }
1755                 /*
1756                  * Check beacon for non-HT station on HT channel
1757                  * and update HT BSS occupancy as appropriate.
1758                  */
1759                 if (IEEE80211_IS_CHAN_HT(ic->ic_curchan)) {
1760                         if (scan.status & IEEE80211_BPARSE_OFFCHAN) {
1761                                 /*
1762                                  * Off control channel; only check frames
1763                                  * that come in the extension channel when
1764                                  * operating w/ HT40.
1765                                  */
1766                                 if (!IEEE80211_IS_CHAN_HT40(ic->ic_curchan))
1767                                         break;
1768                                 if (scan.chan != ic->ic_curchan->ic_extieee)
1769                                         break;
1770                         }
1771                         if (scan.htinfo == NULL) {
1772                                 ieee80211_htprot_update(ic,
1773                                     IEEE80211_HTINFO_OPMODE_PROTOPT |
1774                                     IEEE80211_HTINFO_NONHT_PRESENT);
1775                         } else if (ishtmixed(scan.htinfo)) {
1776                                 /* XXX? take NONHT_PRESENT from beacon? */
1777                                 ieee80211_htprot_update(ic,
1778                                     IEEE80211_HTINFO_OPMODE_MIXED |
1779                                     IEEE80211_HTINFO_NONHT_PRESENT);
1780                         }
1781                 }
1782                 break;
1783         }
1784
1785         case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
1786                 if (vap->iv_state != IEEE80211_S_RUN) {
1787                         vap->iv_stats.is_rx_mgtdiscard++;
1788                         return;
1789                 }
1790                 /*
1791                  * prreq frame format
1792                  *      [tlv] ssid
1793                  *      [tlv] supported rates
1794                  *      [tlv] extended supported rates
1795                  */
1796                 ssid = rates = xrates = NULL;
1797                 sfrm = frm;
1798                 while (efrm - frm > 1) {
1799                         IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
1800                         switch (*frm) {
1801                         case IEEE80211_ELEMID_SSID:
1802                                 ssid = frm;
1803                                 break;
1804                         case IEEE80211_ELEMID_RATES:
1805                                 rates = frm;
1806                                 break;
1807                         case IEEE80211_ELEMID_XRATES:
1808                                 xrates = frm;
1809                                 break;
1810                         }
1811                         frm += frm[1] + 2;
1812                 }
1813                 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
1814                 if (xrates != NULL)
1815                         IEEE80211_VERIFY_ELEMENT(xrates,
1816                                 IEEE80211_RATE_MAXSIZE - rates[1], return);
1817                 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
1818                 IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return);
1819                 if ((vap->iv_flags & IEEE80211_F_HIDESSID) && ssid[1] == 0) {
1820                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1821                             wh, NULL,
1822                             "%s", "no ssid with ssid suppression enabled");
1823                         vap->iv_stats.is_rx_ssidmismatch++; /*XXX*/
1824                         return;
1825                 }
1826
1827                 /* XXX find a better class or define it's own */
1828                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
1829                     "%s", "recv probe req");
1830                 /*
1831                  * Some legacy 11b clients cannot hack a complete
1832                  * probe response frame.  When the request includes
1833                  * only a bare-bones rate set, communicate this to
1834                  * the transmit side.
1835                  */
1836                 ieee80211_send_proberesp(vap, wh->i_addr2,
1837                     is11bclient(rates, xrates) ? IEEE80211_SEND_LEGACY_11B : 0);
1838                 break;
1839
1840         case IEEE80211_FC0_SUBTYPE_AUTH: {
1841                 uint16_t algo, seq, status;
1842
1843                 if (vap->iv_state != IEEE80211_S_RUN) {
1844                         vap->iv_stats.is_rx_mgtdiscard++;
1845                         return;
1846                 }
1847                 if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) {
1848                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1849                             wh, NULL, "%s", "wrong bssid");
1850                         vap->iv_stats.is_rx_wrongbss++; /*XXX unique stat?*/
1851                         return;
1852                 }
1853                 /*
1854                  * auth frame format
1855                  *      [2] algorithm
1856                  *      [2] sequence
1857                  *      [2] status
1858                  *      [tlv*] challenge
1859                  */
1860                 IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return);
1861                 algo   = le16toh(*(uint16_t *)frm);
1862                 seq    = le16toh(*(uint16_t *)(frm + 2));
1863                 status = le16toh(*(uint16_t *)(frm + 4));
1864                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr2,
1865                     "recv auth frame with algorithm %d seq %d", algo, seq);
1866                 /*
1867                  * Consult the ACL policy module if setup.
1868                  */
1869                 if (vap->iv_acl != NULL &&
1870                     !vap->iv_acl->iac_check(vap, wh->i_addr2)) {
1871                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1872                             wh, NULL, "%s", "disallowed by ACL");
1873                         vap->iv_stats.is_rx_acl++;
1874                         ieee80211_send_error(ni, wh->i_addr2,
1875                             IEEE80211_FC0_SUBTYPE_AUTH,
1876                             (seq+1) | (IEEE80211_STATUS_UNSPECIFIED<<16));
1877                         return;
1878                 }
1879                 if (vap->iv_flags & IEEE80211_F_COUNTERM) {
1880                         IEEE80211_DISCARD(vap,
1881                             IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO,
1882                             wh, NULL, "%s", "TKIP countermeasures enabled");
1883                         vap->iv_stats.is_rx_auth_countermeasures++;
1884                         ieee80211_send_error(ni, wh->i_addr2,
1885                                 IEEE80211_FC0_SUBTYPE_AUTH,
1886                                 IEEE80211_REASON_MIC_FAILURE);
1887                         return;
1888                 }
1889                 if (algo == IEEE80211_AUTH_ALG_SHARED)
1890                         hostap_auth_shared(ni, wh, frm + 6, efrm, rssi, nf,
1891                             seq, status);
1892                 else if (algo == IEEE80211_AUTH_ALG_OPEN)
1893                         hostap_auth_open(ni, wh, rssi, nf, seq, status);
1894                 else if (algo == IEEE80211_AUTH_ALG_LEAP) {
1895                         authalgreject(ni, wh, algo,
1896                             seq+1, IEEE80211_STATUS_ALG);
1897                         return;
1898                 } else {
1899                         /*
1900                          * We assume that an unknown algorithm is the result
1901                          * of a decryption failure on a shared key auth frame;
1902                          * return a status code appropriate for that instead
1903                          * of IEEE80211_STATUS_ALG.
1904                          *
1905                          * NB: a seq# of 4 is intentional; the decrypted
1906                          *     frame likely has a bogus seq value.
1907                          */
1908                         authalgreject(ni, wh, algo,
1909                             4, IEEE80211_STATUS_CHALLENGE);
1910                         return;
1911                 }
1912                 break;
1913         }
1914
1915         case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
1916         case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: {
1917                 uint16_t capinfo, lintval;
1918                 struct ieee80211_rsnparms rsnparms;
1919
1920                 if (vap->iv_state != IEEE80211_S_RUN) {
1921                         vap->iv_stats.is_rx_mgtdiscard++;
1922                         return;
1923                 }
1924                 if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) {
1925                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1926                             wh, NULL, "%s", "wrong bssid");
1927                         vap->iv_stats.is_rx_assoc_bss++;
1928                         return;
1929                 }
1930                 if (subtype == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) {
1931                         reassoc = 1;
1932                         resp = IEEE80211_FC0_SUBTYPE_REASSOC_RESP;
1933                 } else {
1934                         reassoc = 0;
1935                         resp = IEEE80211_FC0_SUBTYPE_ASSOC_RESP;
1936                 }
1937                 if (ni == vap->iv_bss) {
1938                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2,
1939                             "deny %s request, sta not authenticated",
1940                             reassoc ? "reassoc" : "assoc");
1941                         ieee80211_send_error(ni, wh->i_addr2,
1942                             IEEE80211_FC0_SUBTYPE_DEAUTH,
1943                             IEEE80211_REASON_ASSOC_NOT_AUTHED);
1944                         vap->iv_stats.is_rx_assoc_notauth++;
1945                         return;
1946                 }
1947
1948                 /*
1949                  * asreq frame format
1950                  *      [2] capability information
1951                  *      [2] listen interval
1952                  *      [6*] current AP address (reassoc only)
1953                  *      [tlv] ssid
1954                  *      [tlv] supported rates
1955                  *      [tlv] extended supported rates
1956                  *      [tlv] WPA or RSN
1957                  *      [tlv] HT capabilities
1958                  *      [tlv] Atheros capabilities
1959                  */
1960                 IEEE80211_VERIFY_LENGTH(efrm - frm, (reassoc ? 10 : 4), return);
1961                 capinfo = le16toh(*(uint16_t *)frm);    frm += 2;
1962                 lintval = le16toh(*(uint16_t *)frm);    frm += 2;
1963                 if (reassoc)
1964                         frm += 6;       /* ignore current AP info */
1965                 ssid = rates = xrates = wpa = rsn = wme = ath = htcap = NULL;
1966                 sfrm = frm;
1967                 while (efrm - frm > 1) {
1968                         IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
1969                         switch (*frm) {
1970                         case IEEE80211_ELEMID_SSID:
1971                                 ssid = frm;
1972                                 break;
1973                         case IEEE80211_ELEMID_RATES:
1974                                 rates = frm;
1975                                 break;
1976                         case IEEE80211_ELEMID_XRATES:
1977                                 xrates = frm;
1978                                 break;
1979                         case IEEE80211_ELEMID_RSN:
1980                                 rsn = frm;
1981                                 break;
1982                         case IEEE80211_ELEMID_HTCAP:
1983                                 htcap = frm;
1984                                 break;
1985                         case IEEE80211_ELEMID_VENDOR:
1986                                 if (iswpaoui(frm))
1987                                         wpa = frm;
1988                                 else if (iswmeinfo(frm))
1989                                         wme = frm;
1990 #ifdef IEEE80211_SUPPORT_SUPERG
1991                                 else if (isatherosoui(frm))
1992                                         ath = frm;
1993 #endif
1994                                 else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) {
1995                                         if (ishtcapoui(frm) && htcap == NULL)
1996                                                 htcap = frm;
1997                                 }
1998                                 break;
1999                         }
2000                         frm += frm[1] + 2;
2001                 }
2002                 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
2003                 if (xrates != NULL)
2004                         IEEE80211_VERIFY_ELEMENT(xrates,
2005                                 IEEE80211_RATE_MAXSIZE - rates[1], return);
2006                 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
2007                 IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return);
2008                 if (htcap != NULL) {
2009                         IEEE80211_VERIFY_LENGTH(htcap[1],
2010                              htcap[0] == IEEE80211_ELEMID_VENDOR ?
2011                                  4 + sizeof(struct ieee80211_ie_htcap)-2 :
2012                                  sizeof(struct ieee80211_ie_htcap)-2,
2013                              return);           /* XXX just NULL out? */
2014                 }
2015
2016                 if ((vap->iv_flags & IEEE80211_F_WPA) &&
2017                     !wpa_assocreq(ni, &rsnparms, wh, wpa, rsn, capinfo))
2018                         return;
2019                 /* discard challenge after association */
2020                 if (ni->ni_challenge != NULL) {
2021                         kfree(ni->ni_challenge, M_80211_NODE);
2022                         ni->ni_challenge = NULL;
2023                 }
2024                 /* NB: 802.11 spec says to ignore station's privacy bit */
2025                 if ((capinfo & IEEE80211_CAPINFO_ESS) == 0) {
2026                         capinfomismatch(ni, wh, reassoc, resp,
2027                             "capability", capinfo);
2028                         return;
2029                 }
2030                 /*
2031                  * Disallow re-associate w/ invalid slot time setting.
2032                  */
2033                 if (ni->ni_associd != 0 &&
2034                     IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
2035                     ((ni->ni_capinfo ^ capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME)) {
2036                         capinfomismatch(ni, wh, reassoc, resp,
2037                             "slot time", capinfo);
2038                         return;
2039                 }
2040                 rate = ieee80211_setup_rates(ni, rates, xrates,
2041                                 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE |
2042                                 IEEE80211_F_DONEGO | IEEE80211_F_DODEL);
2043                 if (rate & IEEE80211_RATE_BASIC) {
2044                         ratesetmismatch(ni, wh, reassoc, resp, "legacy", rate);
2045                         vap->iv_stats.is_rx_assoc_norate++;
2046                         return;
2047                 }
2048                 /*
2049                  * If constrained to 11g-only stations reject an
2050                  * 11b-only station.  We cheat a bit here by looking
2051                  * at the max negotiated xmit rate and assuming anyone
2052                  * with a best rate <24Mb/s is an 11b station.
2053                  */
2054                 if ((vap->iv_flags & IEEE80211_F_PUREG) && rate < 48) {
2055                         ratesetmismatch(ni, wh, reassoc, resp, "11g", rate);
2056                         vap->iv_stats.is_rx_assoc_norate++;
2057                         return;
2058                 }
2059                 /*
2060                  * Do HT rate set handling and setup HT node state.
2061                  */
2062                 ni->ni_chan = vap->iv_bss->ni_chan;
2063                 if (IEEE80211_IS_CHAN_HT(ni->ni_chan) && htcap != NULL) {
2064                         rate = ieee80211_setup_htrates(ni, htcap,
2065                                 IEEE80211_F_DOFMCS | IEEE80211_F_DONEGO |
2066                                 IEEE80211_F_DOBRS);
2067                         if (rate & IEEE80211_RATE_BASIC) {
2068                                 ratesetmismatch(ni, wh, reassoc, resp,
2069                                     "HT", rate);
2070                                 vap->iv_stats.is_ht_assoc_norate++;
2071                                 return;
2072                         }
2073                         ieee80211_ht_node_init(ni);
2074                         ieee80211_ht_updatehtcap(ni, htcap);
2075                 } else if (ni->ni_flags & IEEE80211_NODE_HT)
2076                         ieee80211_ht_node_cleanup(ni);
2077 #ifdef IEEE80211_SUPPORT_SUPERG
2078                 else if (ni->ni_ath_flags & IEEE80211_NODE_ATH)
2079                         ieee80211_ff_node_cleanup(ni);
2080 #endif
2081                 /*
2082                  * Allow AMPDU operation only with unencrypted traffic
2083                  * or AES-CCM; the 11n spec only specifies these ciphers
2084                  * so permitting any others is undefined and can lead
2085                  * to interoperability problems.
2086                  */
2087                 if ((ni->ni_flags & IEEE80211_NODE_HT) &&
2088                     (((vap->iv_flags & IEEE80211_F_WPA) &&
2089                       rsnparms.rsn_ucastcipher != IEEE80211_CIPHER_AES_CCM) ||
2090                      (vap->iv_flags & (IEEE80211_F_WPA|IEEE80211_F_PRIVACY)) == IEEE80211_F_PRIVACY)) {
2091                         IEEE80211_NOTE(vap,
2092                             IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni,
2093                             "disallow HT use because WEP or TKIP requested, "
2094                             "capinfo 0x%x ucastcipher %d", capinfo,
2095                             rsnparms.rsn_ucastcipher);
2096                         ieee80211_ht_node_cleanup(ni);
2097                         vap->iv_stats.is_ht_assoc_downgrade++;
2098                 }
2099                 /*
2100                  * If constrained to 11n-only stations reject legacy stations.
2101                  */
2102                 if ((vap->iv_flags_ht & IEEE80211_FHT_PUREN) &&
2103                     (ni->ni_flags & IEEE80211_NODE_HT) == 0) {
2104                         htcapmismatch(ni, wh, reassoc, resp);
2105                         vap->iv_stats.is_ht_assoc_nohtcap++;
2106                         return;
2107                 }
2108                 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
2109                 ni->ni_noise = nf;
2110                 ni->ni_intval = lintval;
2111                 ni->ni_capinfo = capinfo;
2112                 ni->ni_fhdwell = vap->iv_bss->ni_fhdwell;
2113                 ni->ni_fhindex = vap->iv_bss->ni_fhindex;
2114                 /*
2115                  * Store the IEs.
2116                  * XXX maybe better to just expand
2117                  */
2118                 if (ieee80211_ies_init(&ni->ni_ies, sfrm, efrm - sfrm)) {
2119 #define setie(_ie, _off)        ieee80211_ies_setie(ni->ni_ies, _ie, _off)
2120                         if (wpa != NULL)
2121                                 setie(wpa_ie, wpa - sfrm);
2122                         if (rsn != NULL)
2123                                 setie(rsn_ie, rsn - sfrm);
2124                         if (htcap != NULL)
2125                                 setie(htcap_ie, htcap - sfrm);
2126                         if (wme != NULL) {
2127                                 setie(wme_ie, wme - sfrm);
2128                                 /*
2129                                  * Mark node as capable of QoS.
2130                                  */
2131                                 ni->ni_flags |= IEEE80211_NODE_QOS;
2132                         } else
2133                                 ni->ni_flags &= ~IEEE80211_NODE_QOS;
2134 #ifdef IEEE80211_SUPPORT_SUPERG
2135                         if (ath != NULL) {
2136                                 setie(ath_ie, ath - sfrm);
2137                                 /*
2138                                  * Parse ATH station parameters.
2139                                  */
2140                                 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
2141                         } else
2142 #endif
2143                                 ni->ni_ath_flags = 0;
2144 #undef setie
2145                 } else {
2146                         ni->ni_flags &= ~IEEE80211_NODE_QOS;
2147                         ni->ni_ath_flags = 0;
2148                 }
2149                 ieee80211_node_join(ni, resp);
2150                 ieee80211_deliver_l2uf(ni);
2151                 break;
2152         }
2153
2154         case IEEE80211_FC0_SUBTYPE_DEAUTH:
2155         case IEEE80211_FC0_SUBTYPE_DISASSOC: {
2156                 uint16_t reason;
2157
2158                 if (vap->iv_state != IEEE80211_S_RUN ||
2159                     /* NB: can happen when in promiscuous mode */
2160                     !IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) {
2161                         vap->iv_stats.is_rx_mgtdiscard++;
2162                         break;
2163                 }
2164                 /*
2165                  * deauth/disassoc frame format
2166                  *      [2] reason
2167                  */
2168                 IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return);
2169                 reason = le16toh(*(uint16_t *)frm);
2170                 if (subtype == IEEE80211_FC0_SUBTYPE_DEAUTH) {
2171                         vap->iv_stats.is_rx_deauth++;
2172                         IEEE80211_NODE_STAT(ni, rx_deauth);
2173                 } else {
2174                         vap->iv_stats.is_rx_disassoc++;
2175                         IEEE80211_NODE_STAT(ni, rx_disassoc);
2176                 }
2177                 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni,
2178                     "recv %s (reason %d)", ieee80211_mgt_subtype_name[subtype >>
2179                         IEEE80211_FC0_SUBTYPE_SHIFT], reason);
2180                 if (ni != vap->iv_bss)
2181                         ieee80211_node_leave(ni);
2182                 break;
2183         }
2184
2185         case IEEE80211_FC0_SUBTYPE_ACTION:
2186                 if (vap->iv_state == IEEE80211_S_RUN) {
2187                         if (ieee80211_parse_action(ni, m0) == 0)
2188                                 ic->ic_recv_action(ni, wh, frm, efrm);
2189                 } else
2190                         vap->iv_stats.is_rx_mgtdiscard++;
2191                 break;
2192
2193         case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
2194         case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
2195         default:
2196                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
2197                      wh, "mgt", "subtype 0x%x not handled", subtype);
2198                 vap->iv_stats.is_rx_badsubtype++;
2199                 break;
2200         }
2201 }
2202
2203 static void
2204 hostap_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
2205 {
2206         switch (subtype) {
2207         case IEEE80211_FC0_SUBTYPE_PS_POLL:
2208                 hostap_recv_pspoll(ni, m);
2209                 break;
2210         case IEEE80211_FC0_SUBTYPE_BAR:
2211                 ieee80211_recv_bar(ni, m);
2212                 break;
2213         }
2214 }
2215
2216 /*
2217  * Process a received ps-poll frame.
2218  */
2219 static void
2220 hostap_recv_pspoll(struct ieee80211_node *ni, struct mbuf *m0)
2221 {
2222         struct ieee80211vap *vap = ni->ni_vap;
2223         struct ieee80211_frame_min *wh;
2224         struct ifnet *ifp;
2225         struct mbuf *m;
2226         uint16_t aid;
2227         int qlen;
2228
2229         wh = mtod(m0, struct ieee80211_frame_min *);
2230         if (ni->ni_associd == 0) {
2231                 IEEE80211_DISCARD(vap,
2232                     IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG,
2233                     (struct ieee80211_frame *) wh, NULL,
2234                     "%s", "unassociated station");
2235                 vap->iv_stats.is_ps_unassoc++;
2236                 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH,
2237                         IEEE80211_REASON_NOT_ASSOCED);
2238                 return;
2239         }
2240
2241         aid = le16toh(*(uint16_t *)wh->i_dur);
2242         if (aid != ni->ni_associd) {
2243                 IEEE80211_DISCARD(vap,
2244                     IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG,
2245                     (struct ieee80211_frame *) wh, NULL,
2246                     "aid mismatch: sta aid 0x%x poll aid 0x%x",
2247                     ni->ni_associd, aid);
2248                 vap->iv_stats.is_ps_badaid++;
2249                 /*
2250                  * NB: We used to deauth the station but it turns out
2251                  * the Blackberry Curve 8230 (and perhaps other devices)
2252                  * sometimes send the wrong AID when WME is negotiated.
2253                  * Being more lenient here seems ok as we already check
2254                  * the station is associated and we only return frames
2255                  * queued for the station (i.e. we don't use the AID).
2256                  */
2257                 return;
2258         }
2259
2260         /* Okay, take the first queued packet and put it out... */
2261         m = ieee80211_node_psq_dequeue(ni, &qlen);
2262         if (m == NULL) {
2263                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_POWER, wh->i_addr2,
2264                     "%s", "recv ps-poll, but queue empty");
2265                 ieee80211_send_nulldata(ieee80211_ref_node(ni));
2266                 vap->iv_stats.is_ps_qempty++;   /* XXX node stat */
2267                 if (vap->iv_set_tim != NULL)
2268                         vap->iv_set_tim(ni, 0); /* just in case */
2269                 return;
2270         }
2271         /*
2272          * If there are more packets, set the more packets bit
2273          * in the packet dispatched to the station; otherwise
2274          * turn off the TIM bit.
2275          */
2276         if (qlen != 0) {
2277                 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni,
2278                     "recv ps-poll, send packet, %u still queued", qlen);
2279                 m->m_flags |= M_MORE_DATA;
2280         } else {
2281                 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni,
2282                     "%s", "recv ps-poll, send packet, queue empty");
2283                 if (vap->iv_set_tim != NULL)
2284                         vap->iv_set_tim(ni, 0);
2285         }
2286         m->m_flags |= M_PWR_SAV;                /* bypass PS handling */
2287
2288         if (m->m_flags & M_ENCAP)
2289                 ifp = vap->iv_ic->ic_ifp;
2290         else
2291                 ifp = vap->iv_ifp;
2292         ifq_enqueue(&ifp->if_snd, m, NULL);
2293         ifp->if_start(ifp);
2294 }