sys/net80211/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
  26 #include <sys/cdefs.h>
  27 #ifdef __FreeBSD__
  28 __FBSDID("$FreeBSD$");
  29 #endif
  30
  31 /*
  32  * IEEE 802.11 HOSTAP mode support.
  33  */
  34 #include "opt_inet.h"
  35 #include "opt_wlan.h"
  36
  37 #include <sys/param.h>
  38 #include <sys/systm.h>
  39 #include <sys/mbuf.h>
  40 #include <sys/malloc.h>
  41 #include <sys/kernel.h>
  42
  43 #include <sys/socket.h>
  44 #include <sys/sockio.h>
  45 #include <sys/endian.h>
  46 #include <sys/errno.h>
  47 #include <sys/proc.h>
  48 #include <sys/sysctl.h>
  49
  50 #include <net/if.h>
  51 #include <net/if_var.h>
  52 #include <net/if_media.h>
  53 #include <net/if_llc.h>
  54 #include <net/ethernet.h>
  55
  56 #include <net/bpf.h>
  57
  58 #include <net80211/ieee80211_var.h>
  59 #include <net80211/ieee80211_hostap.h>
  60 #include <net80211/ieee80211_input.h>
  61 #ifdef IEEE80211_SUPPORT_SUPERG
  62 #include <net80211/ieee80211_superg.h>
  63 #endif
  64 #include <net80211/ieee80211_wds.h>
  65
  66 #define IEEE80211_RATE2MBS(r)   (((r) & IEEE80211_RATE_VAL) / 2)
  67
  68 static  void hostap_vattach(struct ieee80211vap *);
  69 static  int hostap_newstate(struct ieee80211vap *, enum ieee80211_state, int);
  70 static  int hostap_input(struct ieee80211_node *ni, struct mbuf *m,
  71             const struct ieee80211_rx_stats *,
  72             int rssi, int nf);
  73 static void hostap_deliver_data(struct ieee80211vap *,
  74             struct ieee80211_node *, struct mbuf *);
  75 static void hostap_recv_mgmt(struct ieee80211_node *, struct mbuf *,
  76             int subtype, const struct ieee80211_rx_stats *rxs, int rssi, int nf);
  77 static void hostap_recv_ctl(struct ieee80211_node *, struct mbuf *, int);
  78
  79 void
  80 ieee80211_hostap_attach(struct ieee80211com *ic)
  81 {
  82         ic->ic_vattach[IEEE80211_M_HOSTAP] = hostap_vattach;
  83 }
  84
  85 void
  86 ieee80211_hostap_detach(struct ieee80211com *ic)
  87 {
  88 }
  89
  90 static void
  91 hostap_vdetach(struct ieee80211vap *vap)
  92 {
  93 }
  94
  95 static void
  96 hostap_vattach(struct ieee80211vap *vap)
  97 {
  98         vap->iv_newstate = hostap_newstate;
  99         vap->iv_input = hostap_input;
 100         vap->iv_recv_mgmt = hostap_recv_mgmt;
 101         vap->iv_recv_ctl = hostap_recv_ctl;
 102         vap->iv_opdetach = hostap_vdetach;
 103         vap->iv_deliver_data = hostap_deliver_data;
 104         vap->iv_recv_pspoll = ieee80211_recv_pspoll;
 105 }
 106
 107 static void
 108 sta_disassoc(void *arg, struct ieee80211_node *ni)
 109 {
 110
 111         if (ni->ni_associd != 0) {
 112                 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DISASSOC,
 113                         IEEE80211_REASON_ASSOC_LEAVE);
 114                 ieee80211_node_leave(ni);
 115         }
 116 }
 117
 118 static void
 119 sta_csa(void *arg, struct ieee80211_node *ni)
 120 {
 121         struct ieee80211vap *vap = ni->ni_vap;
 122
 123         if (ni->ni_associd != 0)
 124                 if (ni->ni_inact > vap->iv_inact_init) {
 125                         ni->ni_inact = vap->iv_inact_init;
 126                         IEEE80211_NOTE(vap, IEEE80211_MSG_INACT, ni,
 127                             "%s: inact %u", __func__, ni->ni_inact);
 128                 }
 129 }
 130
 131 static void
 132 sta_drop(void *arg, struct ieee80211_node *ni)
 133 {
 134
 135         if (ni->ni_associd != 0)
 136                 ieee80211_node_leave(ni);
 137 }
 138
 139 /*
 140  * Does a channel change require associated stations to re-associate
 141  * so protocol state is correct.  This is used when doing CSA across
 142  * bands or similar (e.g. HT -> legacy).
 143  */
 144 static int
 145 isbandchange(struct ieee80211com *ic)
 146 {
 147         return ((ic->ic_bsschan->ic_flags ^ ic->ic_csa_newchan->ic_flags) &
 148             (IEEE80211_CHAN_2GHZ | IEEE80211_CHAN_5GHZ | IEEE80211_CHAN_HALF |
 149              IEEE80211_CHAN_QUARTER | IEEE80211_CHAN_HT)) != 0;
 150 }
 151
 152 /*
 153  * IEEE80211_M_HOSTAP vap state machine handler.
 154  */
 155 static int
 156 hostap_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
 157 {
 158         struct ieee80211com *ic = vap->iv_ic;
 159         enum ieee80211_state ostate;
 160
 161         IEEE80211_LOCK_ASSERT(ic);
 162
 163         ostate = vap->iv_state;
 164         IEEE80211_DPRINTF(vap, IEEE80211_MSG_STATE, "%s: %s -> %s (%d)\n",
 165             __func__, ieee80211_state_name[ostate],
 166             ieee80211_state_name[nstate], arg);
 167         vap->iv_state = nstate;                 /* state transition */
 168         if (ostate != IEEE80211_S_SCAN)
 169                 ieee80211_cancel_scan(vap);     /* background scan */
 170         switch (nstate) {
 171         case IEEE80211_S_INIT:
 172                 switch (ostate) {
 173                 case IEEE80211_S_SCAN:
 174                         ieee80211_cancel_scan(vap);
 175                         break;
 176                 case IEEE80211_S_CAC:
 177                         ieee80211_dfs_cac_stop(vap);
 178                         break;
 179                 case IEEE80211_S_RUN:
 180                         ieee80211_iterate_nodes_vap(&ic->ic_sta, vap,
 181                             sta_disassoc, NULL);
 182                         break;
 183                 default:
 184                         break;
 185                 }
 186                 if (ostate != IEEE80211_S_INIT) {
 187                         /* NB: optimize INIT -> INIT case */
 188                         ieee80211_reset_bss(vap);
 189                 }
 190                 if (vap->iv_auth->ia_detach != NULL)
 191                         vap->iv_auth->ia_detach(vap);
 192                 break;
 193         case IEEE80211_S_SCAN:
 194                 switch (ostate) {
 195                 case IEEE80211_S_CSA:
 196                 case IEEE80211_S_RUN:
 197                         ieee80211_iterate_nodes_vap(&ic->ic_sta, vap,
 198                             sta_disassoc, NULL);
 199                         /*
 200                          * Clear overlapping BSS state; the beacon frame
 201                          * will be reconstructed on transition to the RUN
 202                          * state and the timeout routines check if the flag
 203                          * is set before doing anything so this is sufficient.
 204                          */
 205                         ic->ic_flags_ext &= ~IEEE80211_FEXT_NONERP_PR;
 206                         ic->ic_flags_ht &= ~IEEE80211_FHT_NONHT_PR;
 207                         /* fall thru... */
 208                 case IEEE80211_S_CAC:
 209                         /*
 210                          * NB: We may get here because of a manual channel
 211                          *     change in which case we need to stop CAC
 212                          * XXX no need to stop if ostate RUN but it's ok
 213                          */
 214                         ieee80211_dfs_cac_stop(vap);
 215                         /* fall thru... */
 216                 case IEEE80211_S_INIT:
 217                         if (vap->iv_des_chan != IEEE80211_CHAN_ANYC &&
 218                             !IEEE80211_IS_CHAN_RADAR(vap->iv_des_chan)) {
 219                                 /*
 220                                  * Already have a channel; bypass the
 221                                  * scan and startup immediately.
 222                                  * ieee80211_create_ibss will call back to
 223                                  * move us to RUN state.
 224                                  */
 225                                 ieee80211_create_ibss(vap, vap->iv_des_chan);
 226                                 break;
 227                         }
 228                         /*
 229                          * Initiate a scan.  We can come here as a result
 230                          * of an IEEE80211_IOC_SCAN_REQ too in which case
 231                          * the vap will be marked with IEEE80211_FEXT_SCANREQ
 232                          * and the scan request parameters will be present
 233                          * in iv_scanreq.  Otherwise we do the default.
 234                          */
 235                         if (vap->iv_flags_ext & IEEE80211_FEXT_SCANREQ) {
 236                                 ieee80211_check_scan(vap,
 237                                     vap->iv_scanreq_flags,
 238                                     vap->iv_scanreq_duration,
 239                                     vap->iv_scanreq_mindwell,
 240                                     vap->iv_scanreq_maxdwell,
 241                                     vap->iv_scanreq_nssid, vap->iv_scanreq_ssid);
 242                                 vap->iv_flags_ext &= ~IEEE80211_FEXT_SCANREQ;
 243                         } else
 244                                 ieee80211_check_scan_current(vap);
 245                         break;
 246                 case IEEE80211_S_SCAN:
 247                         /*
 248                          * A state change requires a reset; scan.
 249                          */
 250                         ieee80211_check_scan_current(vap);
 251                         break;
 252                 default:
 253                         break;
 254                 }
 255                 break;
 256         case IEEE80211_S_CAC:
 257                 /*
 258                  * Start CAC on a DFS channel.  We come here when starting
 259                  * a bss on a DFS channel (see ieee80211_create_ibss).
 260                  */
 261                 ieee80211_dfs_cac_start(vap);
 262                 break;
 263         case IEEE80211_S_RUN:
 264                 if (vap->iv_flags & IEEE80211_F_WPA) {
 265                         /* XXX validate prerequisites */
 266                 }
 267                 switch (ostate) {
 268                 case IEEE80211_S_INIT:
 269                         /*
 270                          * Already have a channel; bypass the
 271                          * scan and startup immediately.
 272                          * Note that ieee80211_create_ibss will call
 273                          * back to do a RUN->RUN state change.
 274                          */
 275                         ieee80211_create_ibss(vap,
 276                             ieee80211_ht_adjust_channel(ic,
 277                                 ic->ic_curchan, vap->iv_flags_ht));
 278                         /* NB: iv_bss is changed on return */
 279                         break;
 280                 case IEEE80211_S_CAC:
 281                         /*
 282                          * NB: This is the normal state change when CAC
 283                          * expires and no radar was detected; no need to
 284                          * clear the CAC timer as it's already expired.
 285                          */
 286                         /* fall thru... */
 287                 case IEEE80211_S_CSA:
 288                         /*
 289                          * Shorten inactivity timer of associated stations
 290                          * to weed out sta's that don't follow a CSA.
 291                          */
 292                         ieee80211_iterate_nodes_vap(&ic->ic_sta, vap,
 293                             sta_csa, NULL);
 294                         /*
 295                          * Update bss node channel to reflect where
 296                          * we landed after CSA.
 297                          */
 298                         ieee80211_node_set_chan(vap->iv_bss,
 299                             ieee80211_ht_adjust_channel(ic, ic->ic_curchan,
 300                                 ieee80211_htchanflags(vap->iv_bss->ni_chan)));
 301                         /* XXX bypass debug msgs */
 302                         break;
 303                 case IEEE80211_S_SCAN:
 304                 case IEEE80211_S_RUN:
 305 #ifdef IEEE80211_DEBUG
 306                         if (ieee80211_msg_debug(vap)) {
 307                                 struct ieee80211_node *ni = vap->iv_bss;
 308                                 ieee80211_note(vap,
 309                                     "synchronized with %s ssid ",
 310                                     ether_sprintf(ni->ni_bssid));
 311                                 ieee80211_print_essid(ni->ni_essid,
 312                                     ni->ni_esslen);
 313                                 /* XXX MCS/HT */
 314                                 printf(" channel %d start %uMb\n",
 315                                     ieee80211_chan2ieee(ic, ic->ic_curchan),
 316                                     IEEE80211_RATE2MBS(ni->ni_txrate));
 317                         }
 318 #endif
 319                         break;
 320                 default:
 321                         break;
 322                 }
 323                 /*
 324                  * Start/stop the authenticator.  We delay until here
 325                  * to allow configuration to happen out of order.
 326                  */
 327                 if (vap->iv_auth->ia_attach != NULL) {
 328                         /* XXX check failure */
 329                         vap->iv_auth->ia_attach(vap);
 330                 } else if (vap->iv_auth->ia_detach != NULL) {
 331                         vap->iv_auth->ia_detach(vap);
 332                 }
 333                 ieee80211_node_authorize(vap->iv_bss);
 334                 break;
 335         case IEEE80211_S_CSA:
 336                 if (ostate == IEEE80211_S_RUN && isbandchange(ic)) {
 337                         /*
 338                          * On a ``band change'' silently drop associated
 339                          * stations as they must re-associate before they
 340                          * can pass traffic (as otherwise protocol state
 341                          * such as capabilities and the negotiated rate
 342                          * set may/will be wrong).
 343                          */
 344                         ieee80211_iterate_nodes_vap(&ic->ic_sta, vap,
 345                             sta_drop, NULL);
 346                 }
 347                 break;
 348         default:
 349                 break;
 350         }
 351         return 0;
 352 }
 353
 354 static void
 355 hostap_deliver_data(struct ieee80211vap *vap,
 356         struct ieee80211_node *ni, struct mbuf *m)
 357 {
 358         struct ether_header *eh = mtod(m, struct ether_header *);
 359         struct ifnet *ifp = vap->iv_ifp;
 360
 361         /* clear driver/net80211 flags before passing up */
 362         m->m_flags &= ~(M_MCAST | M_BCAST);
 363         m_clrprotoflags(m);
 364
 365         KASSERT(vap->iv_opmode == IEEE80211_M_HOSTAP,
 366             ("gack, opmode %d", vap->iv_opmode));
 367         /*
 368          * Do accounting.
 369          */
 370         if_inc_counter(ifp, IFCOUNTER_IPACKETS, 1);
 371         IEEE80211_NODE_STAT(ni, rx_data);
 372         IEEE80211_NODE_STAT_ADD(ni, rx_bytes, m->m_pkthdr.len);
 373         if (ETHER_IS_MULTICAST(eh->ether_dhost)) {
 374                 m->m_flags |= M_MCAST;          /* XXX M_BCAST? */
 375                 IEEE80211_NODE_STAT(ni, rx_mcast);
 376         } else
 377                 IEEE80211_NODE_STAT(ni, rx_ucast);
 378
 379         /* perform as a bridge within the AP */
 380         if ((vap->iv_flags & IEEE80211_F_NOBRIDGE) == 0) {
 381                 struct mbuf *mcopy = NULL;
 382
 383                 if (m->m_flags & M_MCAST) {
 384                         mcopy = m_dup(m, M_NOWAIT);
 385                         if (mcopy == NULL)
 386                                 if_inc_counter(ifp, IFCOUNTER_OERRORS, 1);
 387                         else
 388                                 mcopy->m_flags |= M_MCAST;
 389                 } else {
 390                         /*
 391                          * Check if the destination is associated with the
 392                          * same vap and authorized to receive traffic.
 393                          * Beware of traffic destined for the vap itself;
 394                          * sending it will not work; just let it be delivered
 395                          * normally.
 396                          */
 397                         struct ieee80211_node *sta = ieee80211_find_vap_node(
 398                              &vap->iv_ic->ic_sta, vap, eh->ether_dhost);
 399                         if (sta != NULL) {
 400                                 if (ieee80211_node_is_authorized(sta)) {
 401                                         /*
 402                                          * Beware of sending to ourself; this
 403                                          * needs to happen via the normal
 404                                          * input path.
 405                                          */
 406                                         if (sta != vap->iv_bss) {
 407                                                 mcopy = m;
 408                                                 m = NULL;
 409                                         }
 410                                 } else {
 411                                         vap->iv_stats.is_rx_unauth++;
 412                                         IEEE80211_NODE_STAT(sta, rx_unauth);
 413                                 }
 414                                 ieee80211_free_node(sta);
 415                         }
 416                 }
 417                 if (mcopy != NULL)
 418                         (void) ieee80211_vap_xmitpkt(vap, mcopy);
 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_vtag = 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,
 471     const struct ieee80211_rx_stats *rxs, int rssi, int nf)
 472 {
 473         struct ieee80211vap *vap = ni->ni_vap;
 474         struct ieee80211com *ic = ni->ni_ic;
 475         struct ifnet *ifp = vap->iv_ifp;
 476         struct ieee80211_frame *wh;
 477         struct ieee80211_key *key;
 478         struct ether_header *eh;
 479         int hdrspace, need_tap = 1;     /* mbuf need to be tapped. */
 480         uint8_t dir, type, subtype, qos;
 481         uint8_t *bssid;
 482         int is_hw_decrypted = 0;
 483         int has_decrypted = 0;
 484
 485         /*
 486          * Some devices do hardware decryption all the way through
 487          * to pretending the frame wasn't encrypted in the first place.
 488          * So, tag it appropriately so it isn't discarded inappropriately.
 489          */
 490         if ((rxs != NULL) && (rxs->c_pktflags & IEEE80211_RX_F_DECRYPTED))
 491                 is_hw_decrypted = 1;
 492
 493         if (m->m_flags & M_AMPDU_MPDU) {
 494                 /*
 495                  * Fastpath for A-MPDU reorder q resubmission.  Frames
 496                  * w/ M_AMPDU_MPDU marked have already passed through
 497                  * here but were received out of order and been held on
 498                  * the reorder queue.  When resubmitted they are marked
 499                  * with the M_AMPDU_MPDU flag and we can bypass most of
 500                  * the normal processing.
 501                  */
 502                 wh = mtod(m, struct ieee80211_frame *);
 503                 type = IEEE80211_FC0_TYPE_DATA;
 504                 dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
 505                 subtype = IEEE80211_FC0_SUBTYPE_QOS;
 506                 hdrspace = ieee80211_hdrspace(ic, wh);  /* XXX optimize? */
 507                 goto resubmit_ampdu;
 508         }
 509
 510         KASSERT(ni != NULL, ("null node"));
 511         ni->ni_inact = ni->ni_inact_reload;
 512
 513         type = -1;                      /* undefined */
 514
 515         if (m->m_pkthdr.len < sizeof(struct ieee80211_frame_min)) {
 516                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 517                     ni->ni_macaddr, NULL,
 518                     "too short (1): len %u", m->m_pkthdr.len);
 519                 vap->iv_stats.is_rx_tooshort++;
 520                 goto out;
 521         }
 522         /*
 523          * Bit of a cheat here, we use a pointer for a 3-address
 524          * frame format but don't reference fields past outside
 525          * ieee80211_frame_min w/o first validating the data is
 526          * present.
 527          */
 528         wh = mtod(m, struct ieee80211_frame *);
 529
 530         if ((wh->i_fc[0] & IEEE80211_FC0_VERSION_MASK) !=
 531             IEEE80211_FC0_VERSION_0) {
 532                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 533                     ni->ni_macaddr, NULL, "wrong version, fc %02x:%02x",
 534                     wh->i_fc[0], wh->i_fc[1]);
 535                 vap->iv_stats.is_rx_badversion++;
 536                 goto err;
 537         }
 538
 539         dir = wh->i_fc[1] & IEEE80211_FC1_DIR_MASK;
 540         type = wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK;
 541         subtype = wh->i_fc[0] & IEEE80211_FC0_SUBTYPE_MASK;
 542         if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
 543                 if (dir != IEEE80211_FC1_DIR_NODS)
 544                         bssid = wh->i_addr1;
 545                 else if (type == IEEE80211_FC0_TYPE_CTL)
 546                         bssid = wh->i_addr1;
 547                 else {
 548                         if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
 549                                 IEEE80211_DISCARD_MAC(vap,
 550                                     IEEE80211_MSG_ANY, ni->ni_macaddr,
 551                                     NULL, "too short (2): len %u",
 552                                     m->m_pkthdr.len);
 553                                 vap->iv_stats.is_rx_tooshort++;
 554                                 goto out;
 555                         }
 556                         bssid = wh->i_addr3;
 557                 }
 558                 /*
 559                  * Validate the bssid.
 560                  */
 561                 if (!(type == IEEE80211_FC0_TYPE_MGT &&
 562                       subtype == IEEE80211_FC0_SUBTYPE_BEACON) &&
 563                     !IEEE80211_ADDR_EQ(bssid, vap->iv_bss->ni_bssid) &&
 564                     !IEEE80211_ADDR_EQ(bssid, ifp->if_broadcastaddr)) {
 565                         /* not interested in */
 566                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
 567                             bssid, NULL, "%s", "not to bss");
 568                         vap->iv_stats.is_rx_wrongbss++;
 569                         goto out;
 570                 }
 571
 572                 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
 573                 ni->ni_noise = nf;
 574                 if (IEEE80211_HAS_SEQ(type, subtype)) {
 575                         uint8_t tid = ieee80211_gettid(wh);
 576                         if (IEEE80211_QOS_HAS_SEQ(wh) &&
 577                             TID_TO_WME_AC(tid) >= WME_AC_VI)
 578                                 ic->ic_wme.wme_hipri_traffic++;
 579                         if (! ieee80211_check_rxseq(ni, wh, bssid))
 580                                 goto out;
 581                 }
 582         }
 583
 584         switch (type) {
 585         case IEEE80211_FC0_TYPE_DATA:
 586                 hdrspace = ieee80211_hdrspace(ic, wh);
 587                 if (m->m_len < hdrspace &&
 588                     (m = m_pullup(m, hdrspace)) == NULL) {
 589                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 590                             ni->ni_macaddr, NULL,
 591                             "data too short: expecting %u", hdrspace);
 592                         vap->iv_stats.is_rx_tooshort++;
 593                         goto out;               /* XXX */
 594                 }
 595                 if (!(dir == IEEE80211_FC1_DIR_TODS ||
 596                      (dir == IEEE80211_FC1_DIR_DSTODS &&
 597                       (vap->iv_flags & IEEE80211_F_DWDS)))) {
 598                         if (dir != IEEE80211_FC1_DIR_DSTODS) {
 599                                 IEEE80211_DISCARD(vap,
 600                                     IEEE80211_MSG_INPUT, wh, "data",
 601                                     "incorrect dir 0x%x", dir);
 602                         } else {
 603                                 IEEE80211_DISCARD(vap,
 604                                     IEEE80211_MSG_INPUT |
 605                                     IEEE80211_MSG_WDS, wh,
 606                                     "4-address data",
 607                                     "%s", "DWDS not enabled");
 608                         }
 609                         vap->iv_stats.is_rx_wrongdir++;
 610                         goto out;
 611                 }
 612                 /* check if source STA is associated */
 613                 if (ni == vap->iv_bss) {
 614                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 615                             wh, "data", "%s", "unknown src");
 616                         ieee80211_send_error(ni, wh->i_addr2,
 617                             IEEE80211_FC0_SUBTYPE_DEAUTH,
 618                             IEEE80211_REASON_NOT_AUTHED);
 619                         vap->iv_stats.is_rx_notassoc++;
 620                         goto err;
 621                 }
 622                 if (ni->ni_associd == 0) {
 623                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 624                             wh, "data", "%s", "unassoc src");
 625                         IEEE80211_SEND_MGMT(ni,
 626                             IEEE80211_FC0_SUBTYPE_DISASSOC,
 627                             IEEE80211_REASON_NOT_ASSOCED);
 628                         vap->iv_stats.is_rx_notassoc++;
 629                         goto err;
 630                 }
 631
 632                 /*
 633                  * Check for power save state change.
 634                  * XXX out-of-order A-MPDU frames?
 635                  */
 636                 if (((wh->i_fc[1] & IEEE80211_FC1_PWR_MGT) ^
 637                     (ni->ni_flags & IEEE80211_NODE_PWR_MGT)))
 638                         vap->iv_node_ps(ni,
 639                                 wh->i_fc[1] & IEEE80211_FC1_PWR_MGT);
 640                 /*
 641                  * For 4-address packets handle WDS discovery
 642                  * notifications.  Once a WDS link is setup frames
 643                  * are just delivered to the WDS vap (see below).
 644                  */
 645                 if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap == NULL) {
 646                         if (!ieee80211_node_is_authorized(ni)) {
 647                                 IEEE80211_DISCARD(vap,
 648                                     IEEE80211_MSG_INPUT |
 649                                     IEEE80211_MSG_WDS, wh,
 650                                     "4-address data",
 651                                     "%s", "unauthorized port");
 652                                 vap->iv_stats.is_rx_unauth++;
 653                                 IEEE80211_NODE_STAT(ni, rx_unauth);
 654                                 goto err;
 655                         }
 656                         ieee80211_dwds_discover(ni, m);
 657                         return type;
 658                 }
 659
 660                 /*
 661                  * Handle A-MPDU re-ordering.  If the frame is to be
 662                  * processed directly then ieee80211_ampdu_reorder
 663                  * will return 0; otherwise it has consumed the mbuf
 664                  * and we should do nothing more with it.
 665                  */
 666                 if ((m->m_flags & M_AMPDU) &&
 667                     ieee80211_ampdu_reorder(ni, m) != 0) {
 668                         m = NULL;
 669                         goto out;
 670                 }
 671         resubmit_ampdu:
 672
 673                 /*
 674                  * Handle privacy requirements.  Note that we
 675                  * must not be preempted from here until after
 676                  * we (potentially) call ieee80211_crypto_demic;
 677                  * otherwise we may violate assumptions in the
 678                  * crypto cipher modules used to do delayed update
 679                  * of replay sequence numbers.
 680                  */
 681                 if (is_hw_decrypted || wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
 682                         if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
 683                                 /*
 684                                  * Discard encrypted frames when privacy is off.
 685                                  */
 686                                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 687                                     wh, "WEP", "%s", "PRIVACY off");
 688                                 vap->iv_stats.is_rx_noprivacy++;
 689                                 IEEE80211_NODE_STAT(ni, rx_noprivacy);
 690                                 goto out;
 691                         }
 692                         if (ieee80211_crypto_decap(ni, m, hdrspace, &key) == 0) {
 693                                 /* NB: stats+msgs handled in crypto_decap */
 694                                 IEEE80211_NODE_STAT(ni, rx_wepfail);
 695                                 goto out;
 696                         }
 697                         wh = mtod(m, struct ieee80211_frame *);
 698                         wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED;
 699                         has_decrypted = 1;
 700                 } else {
 701                         /* XXX M_WEP and IEEE80211_F_PRIVACY */
 702                         key = NULL;
 703                 }
 704
 705                 /*
 706                  * Save QoS bits for use below--before we strip the header.
 707                  */
 708                 if (subtype == IEEE80211_FC0_SUBTYPE_QOS) {
 709                         qos = (dir == IEEE80211_FC1_DIR_DSTODS) ?
 710                             ((struct ieee80211_qosframe_addr4 *)wh)->i_qos[0] :
 711                             ((struct ieee80211_qosframe *)wh)->i_qos[0];
 712                 } else
 713                         qos = 0;
 714
 715                 /*
 716                  * Next up, any fragmentation.
 717                  */
 718                 if (!IEEE80211_IS_MULTICAST(wh->i_addr1)) {
 719                         m = ieee80211_defrag(ni, m, hdrspace);
 720                         if (m == NULL) {
 721                                 /* Fragment dropped or frame not complete yet */
 722                                 goto out;
 723                         }
 724                 }
 725                 wh = NULL;              /* no longer valid, catch any uses */
 726
 727                 /*
 728                  * Next strip any MSDU crypto bits.
 729                  */
 730                 if (key != NULL && !ieee80211_crypto_demic(vap, key, m, 0)) {
 731                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
 732                             ni->ni_macaddr, "data", "%s", "demic error");
 733                         vap->iv_stats.is_rx_demicfail++;
 734                         IEEE80211_NODE_STAT(ni, rx_demicfail);
 735                         goto out;
 736                 }
 737                 /* copy to listener after decrypt */
 738                 if (ieee80211_radiotap_active_vap(vap))
 739                         ieee80211_radiotap_rx(vap, m);
 740                 need_tap = 0;
 741                 /*
 742                  * Finally, strip the 802.11 header.
 743                  */
 744                 m = ieee80211_decap(vap, m, hdrspace);
 745                 if (m == NULL) {
 746                         /* XXX mask bit to check for both */
 747                         /* don't count Null data frames as errors */
 748                         if (subtype == IEEE80211_FC0_SUBTYPE_NODATA ||
 749                             subtype == IEEE80211_FC0_SUBTYPE_QOS_NULL)
 750                                 goto out;
 751                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
 752                             ni->ni_macaddr, "data", "%s", "decap error");
 753                         vap->iv_stats.is_rx_decap++;
 754                         IEEE80211_NODE_STAT(ni, rx_decap);
 755                         goto err;
 756                 }
 757                 eh = mtod(m, struct ether_header *);
 758                 if (!ieee80211_node_is_authorized(ni)) {
 759                         /*
 760                          * Deny any non-PAE frames received prior to
 761                          * authorization.  For open/shared-key
 762                          * authentication the port is mark authorized
 763                          * after authentication completes.  For 802.1x
 764                          * the port is not marked authorized by the
 765                          * authenticator until the handshake has completed.
 766                          */
 767                         if (eh->ether_type != htons(ETHERTYPE_PAE)) {
 768                                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_INPUT,
 769                                     eh->ether_shost, "data",
 770                                     "unauthorized port: ether type 0x%x len %u",
 771                                     eh->ether_type, m->m_pkthdr.len);
 772                                 vap->iv_stats.is_rx_unauth++;
 773                                 IEEE80211_NODE_STAT(ni, rx_unauth);
 774                                 goto err;
 775                         }
 776                 } else {
 777                         /*
 778                          * When denying unencrypted frames, discard
 779                          * any non-PAE frames received without encryption.
 780                          */
 781                         if ((vap->iv_flags & IEEE80211_F_DROPUNENC) &&
 782                             ((has_decrypted == 0) && (m->m_flags & M_WEP) == 0) &&
 783                             (is_hw_decrypted == 0) &&
 784                             eh->ether_type != htons(ETHERTYPE_PAE)) {
 785                                 /*
 786                                  * Drop unencrypted frames.
 787                                  */
 788                                 vap->iv_stats.is_rx_unencrypted++;
 789                                 IEEE80211_NODE_STAT(ni, rx_unencrypted);
 790                                 goto out;
 791                         }
 792                 }
 793                 /* XXX require HT? */
 794                 if (qos & IEEE80211_QOS_AMSDU) {
 795                         m = ieee80211_decap_amsdu(ni, m);
 796                         if (m == NULL)
 797                                 return IEEE80211_FC0_TYPE_DATA;
 798                 } else {
 799 #ifdef IEEE80211_SUPPORT_SUPERG
 800                         m = ieee80211_decap_fastframe(vap, ni, m);
 801                         if (m == NULL)
 802                                 return IEEE80211_FC0_TYPE_DATA;
 803 #endif
 804                 }
 805                 if (dir == IEEE80211_FC1_DIR_DSTODS && ni->ni_wdsvap != NULL)
 806                         ieee80211_deliver_data(ni->ni_wdsvap, ni, m);
 807                 else
 808                         hostap_deliver_data(vap, ni, m);
 809                 return IEEE80211_FC0_TYPE_DATA;
 810
 811         case IEEE80211_FC0_TYPE_MGT:
 812                 vap->iv_stats.is_rx_mgmt++;
 813                 IEEE80211_NODE_STAT(ni, rx_mgmt);
 814                 if (dir != IEEE80211_FC1_DIR_NODS) {
 815                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 816                             wh, "mgt", "incorrect dir 0x%x", dir);
 817                         vap->iv_stats.is_rx_wrongdir++;
 818                         goto err;
 819                 }
 820                 if (m->m_pkthdr.len < sizeof(struct ieee80211_frame)) {
 821                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_ANY,
 822                             ni->ni_macaddr, "mgt", "too short: len %u",
 823                             m->m_pkthdr.len);
 824                         vap->iv_stats.is_rx_tooshort++;
 825                         goto out;
 826                 }
 827                 if (IEEE80211_IS_MULTICAST(wh->i_addr2)) {
 828                         /* ensure return frames are unicast */
 829                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
 830                             wh, NULL, "source is multicast: %s",
 831                             ether_sprintf(wh->i_addr2));
 832                         vap->iv_stats.is_rx_mgtdiscard++;       /* XXX stat */
 833                         goto out;
 834                 }
 835 #ifdef IEEE80211_DEBUG
 836                 if ((ieee80211_msg_debug(vap) && doprint(vap, subtype)) ||
 837                     ieee80211_msg_dumppkts(vap)) {
 838                         if_printf(ifp, "received %s from %s rssi %d\n",
 839                             ieee80211_mgt_subtype_name(subtype),
 840                             ether_sprintf(wh->i_addr2), rssi);
 841                 }
 842 #endif
 843                 if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
 844                         if (subtype != IEEE80211_FC0_SUBTYPE_AUTH) {
 845                                 /*
 846                                  * Only shared key auth frames with a challenge
 847                                  * should be encrypted, discard all others.
 848                                  */
 849                                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 850                                     wh, NULL,
 851                                     "%s", "WEP set but not permitted");
 852                                 vap->iv_stats.is_rx_mgtdiscard++; /* XXX */
 853                                 goto out;
 854                         }
 855                         if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
 856                                 /*
 857                                  * Discard encrypted frames when privacy is off.
 858                                  */
 859                                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
 860                                     wh, NULL, "%s", "WEP set but PRIVACY off");
 861                                 vap->iv_stats.is_rx_noprivacy++;
 862                                 goto out;
 863                         }
 864                         hdrspace = ieee80211_hdrspace(ic, wh);
 865                         if (ieee80211_crypto_decap(ni, m, hdrspace, &key) == 0) {
 866                                 /* NB: stats+msgs handled in crypto_decap */
 867                                 goto out;
 868                         }
 869                         wh = mtod(m, struct ieee80211_frame *);
 870                         wh->i_fc[1] &= ~IEEE80211_FC1_PROTECTED;
 871                         has_decrypted = 1;
 872                 }
 873                 /*
 874                  * Pass the packet to radiotap before calling iv_recv_mgmt().
 875                  * Otherwise iv_recv_mgmt() might pass another packet to
 876                  * radiotap, resulting in out of order packet captures.
 877                  */
 878                 if (ieee80211_radiotap_active_vap(vap))
 879                         ieee80211_radiotap_rx(vap, m);
 880                 need_tap = 0;
 881                 vap->iv_recv_mgmt(ni, m, subtype, rxs, rssi, nf);
 882                 goto out;
 883
 884         case IEEE80211_FC0_TYPE_CTL:
 885                 vap->iv_stats.is_rx_ctl++;
 886                 IEEE80211_NODE_STAT(ni, rx_ctrl);
 887                 vap->iv_recv_ctl(ni, m, subtype);
 888                 goto out;
 889         default:
 890                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
 891                     wh, "bad", "frame type 0x%x", type);
 892                 /* should not come here */
 893                 break;
 894         }
 895 err:
 896         if_inc_counter(ifp, IFCOUNTER_IERRORS, 1);
 897 out:
 898         if (m != NULL) {
 899                 if (need_tap && ieee80211_radiotap_active_vap(vap))
 900                         ieee80211_radiotap_rx(vap, m);
 901                 m_freem(m);
 902         }
 903         return type;
 904 }
 905
 906 static void
 907 hostap_auth_open(struct ieee80211_node *ni, struct ieee80211_frame *wh,
 908     int rssi, int nf, uint16_t seq, uint16_t status)
 909 {
 910         struct ieee80211vap *vap = ni->ni_vap;
 911
 912         KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state));
 913
 914         if (ni->ni_authmode == IEEE80211_AUTH_SHARED) {
 915                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
 916                     ni->ni_macaddr, "open auth",
 917                     "bad sta auth mode %u", ni->ni_authmode);
 918                 vap->iv_stats.is_rx_bad_auth++; /* XXX */
 919                 /*
 920                  * Clear any challenge text that may be there if
 921                  * a previous shared key auth failed and then an
 922                  * open auth is attempted.
 923                  */
 924                 if (ni->ni_challenge != NULL) {
 925                         IEEE80211_FREE(ni->ni_challenge, M_80211_NODE);
 926                         ni->ni_challenge = NULL;
 927                 }
 928                 /* XXX hack to workaround calling convention */
 929                 ieee80211_send_error(ni, wh->i_addr2,
 930                     IEEE80211_FC0_SUBTYPE_AUTH,
 931                     (seq + 1) | (IEEE80211_STATUS_ALG<<16));
 932                 return;
 933         }
 934         if (seq != IEEE80211_AUTH_OPEN_REQUEST) {
 935                 vap->iv_stats.is_rx_bad_auth++;
 936                 return;
 937         }
 938         /* always accept open authentication requests */
 939         if (ni == vap->iv_bss) {
 940                 ni = ieee80211_dup_bss(vap, wh->i_addr2);
 941                 if (ni == NULL)
 942                         return;
 943         } else if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0)
 944                 (void) ieee80211_ref_node(ni);
 945         /*
 946          * Mark the node as referenced to reflect that it's
 947          * reference count has been bumped to insure it remains
 948          * after the transaction completes.
 949          */
 950         ni->ni_flags |= IEEE80211_NODE_AREF;
 951         /*
 952          * Mark the node as requiring a valid association id
 953          * before outbound traffic is permitted.
 954          */
 955         ni->ni_flags |= IEEE80211_NODE_ASSOCID;
 956
 957         if (vap->iv_acl != NULL &&
 958             vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) {
 959                 /*
 960                  * When the ACL policy is set to RADIUS we defer the
 961                  * authorization to a user agent.  Dispatch an event,
 962                  * a subsequent MLME call will decide the fate of the
 963                  * station.  If the user agent is not present then the
 964                  * node will be reclaimed due to inactivity.
 965                  */
 966                 IEEE80211_NOTE_MAC(vap,
 967                     IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL, ni->ni_macaddr,
 968                     "%s", "station authentication defered (radius acl)");
 969                 ieee80211_notify_node_auth(ni);
 970         } else {
 971                 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1);
 972                 IEEE80211_NOTE_MAC(vap,
 973                     IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH, ni->ni_macaddr,
 974                     "%s", "station authenticated (open)");
 975                 /*
 976                  * When 802.1x is not in use mark the port
 977                  * authorized at this point so traffic can flow.
 978                  */
 979                 if (ni->ni_authmode != IEEE80211_AUTH_8021X)
 980                         ieee80211_node_authorize(ni);
 981         }
 982 }
 983
 984 static void
 985 hostap_auth_shared(struct ieee80211_node *ni, struct ieee80211_frame *wh,
 986     uint8_t *frm, uint8_t *efrm, int rssi, int nf,
 987     uint16_t seq, uint16_t status)
 988 {
 989         struct ieee80211vap *vap = ni->ni_vap;
 990         uint8_t *challenge;
 991         int allocbs, estatus;
 992
 993         KASSERT(vap->iv_state == IEEE80211_S_RUN, ("state %d", vap->iv_state));
 994
 995         /*
 996          * NB: this can happen as we allow pre-shared key
 997          * authentication to be enabled w/o wep being turned
 998          * on so that configuration of these can be done
 999          * in any order.  It may be better to enforce the
1000          * ordering in which case this check would just be
1001          * for sanity/consistency.
1002          */
1003         if ((vap->iv_flags & IEEE80211_F_PRIVACY) == 0) {
1004                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1005                     ni->ni_macaddr, "shared key auth",
1006                     "%s", " PRIVACY is disabled");
1007                 estatus = IEEE80211_STATUS_ALG;
1008                 goto bad;
1009         }
1010         /*
1011          * Pre-shared key authentication is evil; accept
1012          * it only if explicitly configured (it is supported
1013          * mainly for compatibility with clients like Mac OS X).
1014          */
1015         if (ni->ni_authmode != IEEE80211_AUTH_AUTO &&
1016             ni->ni_authmode != IEEE80211_AUTH_SHARED) {
1017                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1018                     ni->ni_macaddr, "shared key auth",
1019                     "bad sta auth mode %u", ni->ni_authmode);
1020                 vap->iv_stats.is_rx_bad_auth++; /* XXX maybe a unique error? */
1021                 estatus = IEEE80211_STATUS_ALG;
1022                 goto bad;
1023         }
1024
1025         challenge = NULL;
1026         if (frm + 1 < efrm) {
1027                 if ((frm[1] + 2) > (efrm - frm)) {
1028                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1029                             ni->ni_macaddr, "shared key auth",
1030                             "ie %d/%d too long",
1031                             frm[0], (frm[1] + 2) - (efrm - frm));
1032                         vap->iv_stats.is_rx_bad_auth++;
1033                         estatus = IEEE80211_STATUS_CHALLENGE;
1034                         goto bad;
1035                 }
1036                 if (*frm == IEEE80211_ELEMID_CHALLENGE)
1037                         challenge = frm;
1038                 frm += frm[1] + 2;
1039         }
1040         switch (seq) {
1041         case IEEE80211_AUTH_SHARED_CHALLENGE:
1042         case IEEE80211_AUTH_SHARED_RESPONSE:
1043                 if (challenge == NULL) {
1044                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1045                             ni->ni_macaddr, "shared key auth",
1046                             "%s", "no challenge");
1047                         vap->iv_stats.is_rx_bad_auth++;
1048                         estatus = IEEE80211_STATUS_CHALLENGE;
1049                         goto bad;
1050                 }
1051                 if (challenge[1] != IEEE80211_CHALLENGE_LEN) {
1052                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1053                             ni->ni_macaddr, "shared key auth",
1054                             "bad challenge len %d", challenge[1]);
1055                         vap->iv_stats.is_rx_bad_auth++;
1056                         estatus = IEEE80211_STATUS_CHALLENGE;
1057                         goto bad;
1058                 }
1059         default:
1060                 break;
1061         }
1062         switch (seq) {
1063         case IEEE80211_AUTH_SHARED_REQUEST:
1064                 if (ni == vap->iv_bss) {
1065                         ni = ieee80211_dup_bss(vap, wh->i_addr2);
1066                         if (ni == NULL) {
1067                                 /* NB: no way to return an error */
1068                                 return;
1069                         }
1070                         allocbs = 1;
1071                 } else {
1072                         if ((ni->ni_flags & IEEE80211_NODE_AREF) == 0)
1073                                 (void) ieee80211_ref_node(ni);
1074                         allocbs = 0;
1075                 }
1076                 /*
1077                  * Mark the node as referenced to reflect that it's
1078                  * reference count has been bumped to insure it remains
1079                  * after the transaction completes.
1080                  */
1081                 ni->ni_flags |= IEEE80211_NODE_AREF;
1082                 /*
1083                  * Mark the node as requiring a valid association id
1084                  * before outbound traffic is permitted.
1085                  */
1086                 ni->ni_flags |= IEEE80211_NODE_ASSOCID;
1087                 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
1088                 ni->ni_noise = nf;
1089                 if (!ieee80211_alloc_challenge(ni)) {
1090                         /* NB: don't return error so they rexmit */
1091                         return;
1092                 }
1093                 get_random_bytes(ni->ni_challenge,
1094                         IEEE80211_CHALLENGE_LEN);
1095                 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH,
1096                     ni, "shared key %sauth request", allocbs ? "" : "re");
1097                 /*
1098                  * When the ACL policy is set to RADIUS we defer the
1099                  * authorization to a user agent.  Dispatch an event,
1100                  * a subsequent MLME call will decide the fate of the
1101                  * station.  If the user agent is not present then the
1102                  * node will be reclaimed due to inactivity.
1103                  */
1104                 if (vap->iv_acl != NULL &&
1105                     vap->iv_acl->iac_getpolicy(vap) == IEEE80211_MACCMD_POLICY_RADIUS) {
1106                         IEEE80211_NOTE_MAC(vap,
1107                             IEEE80211_MSG_AUTH | IEEE80211_MSG_ACL,
1108                             ni->ni_macaddr,
1109                             "%s", "station authentication defered (radius acl)");
1110                         ieee80211_notify_node_auth(ni);
1111                         return;
1112                 }
1113                 break;
1114         case IEEE80211_AUTH_SHARED_RESPONSE:
1115                 if (ni == vap->iv_bss) {
1116                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1117                             ni->ni_macaddr, "shared key response",
1118                             "%s", "unknown station");
1119                         /* NB: don't send a response */
1120                         return;
1121                 }
1122                 if (ni->ni_challenge == NULL) {
1123                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1124                             ni->ni_macaddr, "shared key response",
1125                             "%s", "no challenge recorded");
1126                         vap->iv_stats.is_rx_bad_auth++;
1127                         estatus = IEEE80211_STATUS_CHALLENGE;
1128                         goto bad;
1129                 }
1130                 if (memcmp(ni->ni_challenge, &challenge[2],
1131                            challenge[1]) != 0) {
1132                         IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1133                             ni->ni_macaddr, "shared key response",
1134                             "%s", "challenge mismatch");
1135                         vap->iv_stats.is_rx_auth_fail++;
1136                         estatus = IEEE80211_STATUS_CHALLENGE;
1137                         goto bad;
1138                 }
1139                 IEEE80211_NOTE(vap, IEEE80211_MSG_DEBUG | IEEE80211_MSG_AUTH,
1140                     ni, "%s", "station authenticated (shared key)");
1141                 ieee80211_node_authorize(ni);
1142                 break;
1143         default:
1144                 IEEE80211_DISCARD_MAC(vap, IEEE80211_MSG_AUTH,
1145                     ni->ni_macaddr, "shared key auth",
1146                     "bad seq %d", seq);
1147                 vap->iv_stats.is_rx_bad_auth++;
1148                 estatus = IEEE80211_STATUS_SEQUENCE;
1149                 goto bad;
1150         }
1151         IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_AUTH, seq + 1);
1152         return;
1153 bad:
1154         /*
1155          * Send an error response; but only when operating as an AP.
1156          */
1157         /* XXX hack to workaround calling convention */
1158         ieee80211_send_error(ni, wh->i_addr2,
1159             IEEE80211_FC0_SUBTYPE_AUTH,
1160             (seq + 1) | (estatus<<16));
1161 }
1162
1163 /*
1164  * Convert a WPA cipher selector OUI to an internal
1165  * cipher algorithm.  Where appropriate we also
1166  * record any key length.
1167  */
1168 static int
1169 wpa_cipher(const uint8_t *sel, uint8_t *keylen, uint8_t *cipher)
1170 {
1171 #define WPA_SEL(x)      (((x)<<24)|WPA_OUI)
1172         uint32_t w = le32dec(sel);
1173
1174         switch (w) {
1175         case WPA_SEL(WPA_CSE_NULL):
1176                 *cipher = IEEE80211_CIPHER_NONE;
1177                 break;
1178         case WPA_SEL(WPA_CSE_WEP40):
1179                 if (keylen)
1180                         *keylen = 40 / NBBY;
1181                 *cipher = IEEE80211_CIPHER_WEP;
1182                 break;
1183         case WPA_SEL(WPA_CSE_WEP104):
1184                 if (keylen)
1185                         *keylen = 104 / NBBY;
1186                 *cipher = IEEE80211_CIPHER_WEP;
1187                 break;
1188         case WPA_SEL(WPA_CSE_TKIP):
1189                 *cipher = IEEE80211_CIPHER_TKIP;
1190                 break;
1191         case WPA_SEL(WPA_CSE_CCMP):
1192                 *cipher = IEEE80211_CIPHER_AES_CCM;
1193                 break;
1194         default:
1195                 return (EINVAL);
1196         }
1197
1198         return (0);
1199 #undef WPA_SEL
1200 }
1201
1202 /*
1203  * Convert a WPA key management/authentication algorithm
1204  * to an internal code.
1205  */
1206 static int
1207 wpa_keymgmt(const uint8_t *sel)
1208 {
1209 #define WPA_SEL(x)      (((x)<<24)|WPA_OUI)
1210         uint32_t w = le32dec(sel);
1211
1212         switch (w) {
1213         case WPA_SEL(WPA_ASE_8021X_UNSPEC):
1214                 return WPA_ASE_8021X_UNSPEC;
1215         case WPA_SEL(WPA_ASE_8021X_PSK):
1216                 return WPA_ASE_8021X_PSK;
1217         case WPA_SEL(WPA_ASE_NONE):
1218                 return WPA_ASE_NONE;
1219         }
1220         return 0;               /* NB: so is discarded */
1221 #undef WPA_SEL
1222 }
1223
1224 /*
1225  * Parse a WPA information element to collect parameters.
1226  * Note that we do not validate security parameters; that
1227  * is handled by the authenticator; the parsing done here
1228  * is just for internal use in making operational decisions.
1229  */
1230 static int
1231 ieee80211_parse_wpa(struct ieee80211vap *vap, const uint8_t *frm,
1232         struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh)
1233 {
1234         uint8_t len = frm[1];
1235         uint32_t w;
1236         int error, n;
1237
1238         /*
1239          * Check the length once for fixed parts: OUI, type,
1240          * version, mcast cipher, and 2 selector counts.
1241          * Other, variable-length data, must be checked separately.
1242          */
1243         if ((vap->iv_flags & IEEE80211_F_WPA1) == 0) {
1244                 IEEE80211_DISCARD_IE(vap,
1245                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1246                     wh, "WPA", "not WPA, flags 0x%x", vap->iv_flags);
1247                 return IEEE80211_REASON_IE_INVALID;
1248         }
1249         if (len < 14) {
1250                 IEEE80211_DISCARD_IE(vap,
1251                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1252                     wh, "WPA", "too short, len %u", len);
1253                 return IEEE80211_REASON_IE_INVALID;
1254         }
1255         frm += 6, len -= 4;             /* NB: len is payload only */
1256         /* NB: iswpaoui already validated the OUI and type */
1257         w = le16dec(frm);
1258         if (w != WPA_VERSION) {
1259                 IEEE80211_DISCARD_IE(vap,
1260                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1261                     wh, "WPA", "bad version %u", w);
1262                 return IEEE80211_REASON_IE_INVALID;
1263         }
1264         frm += 2, len -= 2;
1265
1266         memset(rsn, 0, sizeof(*rsn));
1267
1268         /* multicast/group cipher */
1269         error = wpa_cipher(frm, &rsn->rsn_mcastkeylen, &rsn->rsn_mcastcipher);
1270         if (error != 0) {
1271                 IEEE80211_DISCARD_IE(vap,
1272                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1273                     wh, "WPA", "unknown mcast cipher suite %08X",
1274                     le32dec(frm));
1275                 return IEEE80211_REASON_GROUP_CIPHER_INVALID;
1276         }
1277         frm += 4, len -= 4;
1278
1279         /* unicast ciphers */
1280         n = le16dec(frm);
1281         frm += 2, len -= 2;
1282         if (len < n*4+2) {
1283                 IEEE80211_DISCARD_IE(vap,
1284                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1285                     wh, "WPA", "ucast cipher data too short; len %u, n %u",
1286                     len, n);
1287                 return IEEE80211_REASON_IE_INVALID;
1288         }
1289         w = 0;
1290         for (; n > 0; n--) {
1291                 uint8_t cipher;
1292
1293                 error = wpa_cipher(frm, &rsn->rsn_ucastkeylen, &cipher);
1294                 if (error == 0)
1295                         w |= 1 << cipher;
1296
1297                 frm += 4, len -= 4;
1298         }
1299         if (w == 0) {
1300                 IEEE80211_DISCARD_IE(vap,
1301                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1302                     wh, "WPA", "no usable pairwise cipher suite found (w=%d)",
1303                     w);
1304                 return IEEE80211_REASON_PAIRWISE_CIPHER_INVALID;
1305         }
1306         /* XXX other? */
1307         if (w & (1 << IEEE80211_CIPHER_AES_CCM))
1308                 rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM;
1309         else
1310                 rsn->rsn_ucastcipher = IEEE80211_CIPHER_TKIP;
1311
1312         /* key management algorithms */
1313         n = le16dec(frm);
1314         frm += 2, len -= 2;
1315         if (len < n*4) {
1316                 IEEE80211_DISCARD_IE(vap,
1317                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1318                     wh, "WPA", "key mgmt alg data too short; len %u, n %u",
1319                     len, n);
1320                 return IEEE80211_REASON_IE_INVALID;
1321         }
1322         w = 0;
1323         for (; n > 0; n--) {
1324                 w |= wpa_keymgmt(frm);
1325                 frm += 4, len -= 4;
1326         }
1327         if (w & WPA_ASE_8021X_UNSPEC)
1328                 rsn->rsn_keymgmt = WPA_ASE_8021X_UNSPEC;
1329         else
1330                 rsn->rsn_keymgmt = WPA_ASE_8021X_PSK;
1331
1332         if (len > 2)            /* optional capabilities */
1333                 rsn->rsn_caps = le16dec(frm);
1334
1335         return 0;
1336 }
1337
1338 /*
1339  * Convert an RSN cipher selector OUI to an internal
1340  * cipher algorithm.  Where appropriate we also
1341  * record any key length.
1342  */
1343 static int
1344 rsn_cipher(const uint8_t *sel, uint8_t *keylen, uint8_t *cipher)
1345 {
1346 #define RSN_SEL(x)      (((x)<<24)|RSN_OUI)
1347         uint32_t w = le32dec(sel);
1348
1349         switch (w) {
1350         case RSN_SEL(RSN_CSE_NULL):
1351                 *cipher = IEEE80211_CIPHER_NONE;
1352                 break;
1353         case RSN_SEL(RSN_CSE_WEP40):
1354                 if (keylen)
1355                         *keylen = 40 / NBBY;
1356                 *cipher = IEEE80211_CIPHER_WEP;
1357                 break;
1358         case RSN_SEL(RSN_CSE_WEP104):
1359                 if (keylen)
1360                         *keylen = 104 / NBBY;
1361                 *cipher = IEEE80211_CIPHER_WEP;
1362                 break;
1363         case RSN_SEL(RSN_CSE_TKIP):
1364                 *cipher = IEEE80211_CIPHER_TKIP;
1365                 break;
1366         case RSN_SEL(RSN_CSE_CCMP):
1367                 *cipher = IEEE80211_CIPHER_AES_CCM;
1368                 break;
1369         case RSN_SEL(RSN_CSE_WRAP):
1370                 *cipher = IEEE80211_CIPHER_AES_OCB;
1371                 break;
1372         default:
1373                 return (EINVAL);
1374         }
1375
1376         return (0);
1377 #undef WPA_SEL
1378 }
1379
1380 /*
1381  * Convert an RSN key management/authentication algorithm
1382  * to an internal code.
1383  */
1384 static int
1385 rsn_keymgmt(const uint8_t *sel)
1386 {
1387 #define RSN_SEL(x)      (((x)<<24)|RSN_OUI)
1388         uint32_t w = le32dec(sel);
1389
1390         switch (w) {
1391         case RSN_SEL(RSN_ASE_8021X_UNSPEC):
1392                 return RSN_ASE_8021X_UNSPEC;
1393         case RSN_SEL(RSN_ASE_8021X_PSK):
1394                 return RSN_ASE_8021X_PSK;
1395         case RSN_SEL(RSN_ASE_NONE):
1396                 return RSN_ASE_NONE;
1397         }
1398         return 0;               /* NB: so is discarded */
1399 #undef RSN_SEL
1400 }
1401
1402 /*
1403  * Parse a WPA/RSN information element to collect parameters
1404  * and validate the parameters against what has been
1405  * configured for the system.
1406  */
1407 static int
1408 ieee80211_parse_rsn(struct ieee80211vap *vap, const uint8_t *frm,
1409         struct ieee80211_rsnparms *rsn, const struct ieee80211_frame *wh)
1410 {
1411         uint8_t len = frm[1];
1412         uint32_t w;
1413         int error, n;
1414
1415         /*
1416          * Check the length once for fixed parts:
1417          * version, mcast cipher, and 2 selector counts.
1418          * Other, variable-length data, must be checked separately.
1419          */
1420         if ((vap->iv_flags & IEEE80211_F_WPA2) == 0) {
1421                 IEEE80211_DISCARD_IE(vap,
1422                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1423                     wh, "WPA", "not RSN, flags 0x%x", vap->iv_flags);
1424                 return IEEE80211_REASON_IE_INVALID;
1425         }
1426         /* XXX may be shorter */
1427         if (len < 10) {
1428                 IEEE80211_DISCARD_IE(vap,
1429                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1430                     wh, "RSN", "too short, len %u", len);
1431                 return IEEE80211_REASON_IE_INVALID;
1432         }
1433         frm += 2;
1434         w = le16dec(frm);
1435         if (w != RSN_VERSION) {
1436                 IEEE80211_DISCARD_IE(vap,
1437                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1438                     wh, "RSN", "bad version %u", w);
1439                 return IEEE80211_REASON_UNSUPP_RSN_IE_VERSION;
1440         }
1441         frm += 2, len -= 2;
1442
1443         memset(rsn, 0, sizeof(*rsn));
1444
1445         /* multicast/group cipher */
1446         error = rsn_cipher(frm, &rsn->rsn_mcastkeylen, &rsn->rsn_mcastcipher);
1447         if (error != 0) {
1448                 IEEE80211_DISCARD_IE(vap,
1449                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1450                     wh, "RSN", "unknown mcast cipher suite %08X",
1451                     le32dec(frm));
1452                 return IEEE80211_REASON_GROUP_CIPHER_INVALID;
1453         }
1454         if (rsn->rsn_mcastcipher == IEEE80211_CIPHER_NONE) {
1455                 IEEE80211_DISCARD_IE(vap,
1456                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1457                     wh, "RSN", "invalid mcast cipher suite %d",
1458                     rsn->rsn_mcastcipher);
1459                 return IEEE80211_REASON_GROUP_CIPHER_INVALID;
1460         }
1461         frm += 4, len -= 4;
1462
1463         /* unicast ciphers */
1464         n = le16dec(frm);
1465         frm += 2, len -= 2;
1466         if (len < n*4+2) {
1467                 IEEE80211_DISCARD_IE(vap,
1468                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1469                     wh, "RSN", "ucast cipher data too short; len %u, n %u",
1470                     len, n);
1471                 return IEEE80211_REASON_IE_INVALID;
1472         }
1473         w = 0;
1474
1475         for (; n > 0; n--) {
1476                 uint8_t cipher;
1477
1478                 error = rsn_cipher(frm, &rsn->rsn_ucastkeylen, &cipher);
1479                 if (error == 0)
1480                         w |= 1 << cipher;
1481
1482                 frm += 4, len -= 4;
1483         }
1484         if (w & (1 << IEEE80211_CIPHER_AES_CCM))
1485                 rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_CCM;
1486         else if (w & (1 << IEEE80211_CIPHER_AES_OCB))
1487                 rsn->rsn_ucastcipher = IEEE80211_CIPHER_AES_OCB;
1488         else if (w & (1 << IEEE80211_CIPHER_TKIP))
1489                 rsn->rsn_ucastcipher = IEEE80211_CIPHER_TKIP;
1490         else if ((w & (1 << IEEE80211_CIPHER_NONE)) &&
1491             (rsn->rsn_mcastcipher == IEEE80211_CIPHER_WEP ||
1492              rsn->rsn_mcastcipher == IEEE80211_CIPHER_TKIP))
1493                 rsn->rsn_ucastcipher = IEEE80211_CIPHER_NONE;
1494         else {
1495                 IEEE80211_DISCARD_IE(vap,
1496                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1497                     wh, "RSN", "no usable pairwise cipher suite found (w=%d)",
1498                     w);
1499                 return IEEE80211_REASON_PAIRWISE_CIPHER_INVALID;
1500         }
1501
1502         /* key management algorithms */
1503         n = le16dec(frm);
1504         frm += 2, len -= 2;
1505         if (len < n*4) {
1506                 IEEE80211_DISCARD_IE(vap,
1507                     IEEE80211_MSG_ELEMID | IEEE80211_MSG_WPA,
1508                     wh, "RSN", "key mgmt alg data too short; len %u, n %u",
1509                     len, n);
1510                 return IEEE80211_REASON_IE_INVALID;
1511         }
1512         w = 0;
1513         for (; n > 0; n--) {
1514                 w |= rsn_keymgmt(frm);
1515                 frm += 4, len -= 4;
1516         }
1517         if (w & RSN_ASE_8021X_UNSPEC)
1518                 rsn->rsn_keymgmt = RSN_ASE_8021X_UNSPEC;
1519         else
1520                 rsn->rsn_keymgmt = RSN_ASE_8021X_PSK;
1521
1522         /* optional RSN capabilities */
1523         if (len > 2)
1524                 rsn->rsn_caps = le16dec(frm);
1525         /* XXXPMKID */
1526
1527         return 0;
1528 }
1529
1530 /*
1531  * WPA/802.11i association request processing.
1532  */
1533 static int
1534 wpa_assocreq(struct ieee80211_node *ni, struct ieee80211_rsnparms *rsnparms,
1535         const struct ieee80211_frame *wh, const uint8_t *wpa,
1536         const uint8_t *rsn, uint16_t capinfo)
1537 {
1538         struct ieee80211vap *vap = ni->ni_vap;
1539         uint8_t reason;
1540         int badwparsn;
1541
1542         ni->ni_flags &= ~(IEEE80211_NODE_WPS|IEEE80211_NODE_TSN);
1543         if (wpa == NULL && rsn == NULL) {
1544                 if (vap->iv_flags_ext & IEEE80211_FEXT_WPS) {
1545                         /*
1546                          * W-Fi Protected Setup (WPS) permits
1547                          * clients to associate and pass EAPOL frames
1548                          * to establish initial credentials.
1549                          */
1550                         ni->ni_flags |= IEEE80211_NODE_WPS;
1551                         return 1;
1552                 }
1553                 if ((vap->iv_flags_ext & IEEE80211_FEXT_TSN) &&
1554                     (capinfo & IEEE80211_CAPINFO_PRIVACY)) {
1555                         /*
1556                          * Transitional Security Network.  Permits clients
1557                          * to associate and use WEP while WPA is configured.
1558                          */
1559                         ni->ni_flags |= IEEE80211_NODE_TSN;
1560                         return 1;
1561                 }
1562                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA,
1563                     wh, NULL, "%s", "no WPA/RSN IE in association request");
1564                 vap->iv_stats.is_rx_assoc_badwpaie++;
1565                 reason = IEEE80211_REASON_IE_INVALID;
1566                 goto bad;
1567         }
1568         /* assert right association security credentials */
1569         badwparsn = 0;                  /* NB: to silence compiler */
1570         switch (vap->iv_flags & IEEE80211_F_WPA) {
1571         case IEEE80211_F_WPA1:
1572                 badwparsn = (wpa == NULL);
1573                 break;
1574         case IEEE80211_F_WPA2:
1575                 badwparsn = (rsn == NULL);
1576                 break;
1577         case IEEE80211_F_WPA1|IEEE80211_F_WPA2:
1578                 badwparsn = (wpa == NULL && rsn == NULL);
1579                 break;
1580         }
1581         if (badwparsn) {
1582                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA,
1583                     wh, NULL,
1584                     "%s", "missing WPA/RSN IE in association request");
1585                 vap->iv_stats.is_rx_assoc_badwpaie++;
1586                 reason = IEEE80211_REASON_IE_INVALID;
1587                 goto bad;
1588         }
1589         /*
1590          * Parse WPA/RSN information element.
1591          */
1592         if (wpa != NULL)
1593                 reason = ieee80211_parse_wpa(vap, wpa, rsnparms, wh);
1594         else
1595                 reason = ieee80211_parse_rsn(vap, rsn, rsnparms, wh);
1596         if (reason != 0) {
1597                 /* XXX wpa->rsn fallback? */
1598                 /* XXX distinguish WPA/RSN? */
1599                 vap->iv_stats.is_rx_assoc_badwpaie++;
1600                 goto bad;
1601         }
1602         IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC | IEEE80211_MSG_WPA, ni,
1603             "%s ie: mc %u/%u uc %u/%u key %u caps 0x%x",
1604             wpa != NULL ? "WPA" : "RSN",
1605             rsnparms->rsn_mcastcipher, rsnparms->rsn_mcastkeylen,
1606             rsnparms->rsn_ucastcipher, rsnparms->rsn_ucastkeylen,
1607             rsnparms->rsn_keymgmt, rsnparms->rsn_caps);
1608
1609         return 1;
1610 bad:
1611         ieee80211_node_deauth(ni, reason);
1612         return 0;
1613 }
1614
1615 /* XXX find a better place for definition */
1616 struct l2_update_frame {
1617         struct ether_header eh;
1618         uint8_t dsap;
1619         uint8_t ssap;
1620         uint8_t control;
1621         uint8_t xid[3];
1622 }  __packed;
1623
1624 /*
1625  * Deliver a TGf L2UF frame on behalf of a station.
1626  * This primes any bridge when the station is roaming
1627  * between ap's on the same wired network.
1628  */
1629 static void
1630 ieee80211_deliver_l2uf(struct ieee80211_node *ni)
1631 {
1632         struct ieee80211vap *vap = ni->ni_vap;
1633         struct ifnet *ifp = vap->iv_ifp;
1634         struct mbuf *m;
1635         struct l2_update_frame *l2uf;
1636         struct ether_header *eh;
1637
1638         m = m_gethdr(M_NOWAIT, MT_DATA);
1639         if (m == NULL) {
1640                 IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni,
1641                     "%s", "no mbuf for l2uf frame");
1642                 vap->iv_stats.is_rx_nobuf++;    /* XXX not right */
1643                 return;
1644         }
1645         l2uf = mtod(m, struct l2_update_frame *);
1646         eh = &l2uf->eh;
1647         /* dst: Broadcast address */
1648         IEEE80211_ADDR_COPY(eh->ether_dhost, ifp->if_broadcastaddr);
1649         /* src: associated STA */
1650         IEEE80211_ADDR_COPY(eh->ether_shost, ni->ni_macaddr);
1651         eh->ether_type = htons(sizeof(*l2uf) - sizeof(*eh));
1652
1653         l2uf->dsap = 0;
1654         l2uf->ssap = 0;
1655         l2uf->control = 0xf5;
1656         l2uf->xid[0] = 0x81;
1657         l2uf->xid[1] = 0x80;
1658         l2uf->xid[2] = 0x00;
1659
1660         m->m_pkthdr.len = m->m_len = sizeof(*l2uf);
1661         hostap_deliver_data(vap, ni, m);
1662 }
1663
1664 static void
1665 ratesetmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
1666         int reassoc, int resp, const char *tag, int rate)
1667 {
1668         IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2,
1669             "deny %s request, %s rate set mismatch, rate/MCS %d",
1670             reassoc ? "reassoc" : "assoc", tag, rate & IEEE80211_RATE_VAL);
1671         IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_BASIC_RATE);
1672         ieee80211_node_leave(ni);
1673 }
1674
1675 static void
1676 capinfomismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
1677         int reassoc, int resp, const char *tag, int capinfo)
1678 {
1679         struct ieee80211vap *vap = ni->ni_vap;
1680
1681         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2,
1682             "deny %s request, %s mismatch 0x%x",
1683             reassoc ? "reassoc" : "assoc", tag, capinfo);
1684         IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_CAPINFO);
1685         ieee80211_node_leave(ni);
1686         vap->iv_stats.is_rx_assoc_capmismatch++;
1687 }
1688
1689 static void
1690 htcapmismatch(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
1691         int reassoc, int resp)
1692 {
1693         IEEE80211_NOTE_MAC(ni->ni_vap, IEEE80211_MSG_ANY, wh->i_addr2,
1694             "deny %s request, %s missing HT ie", reassoc ? "reassoc" : "assoc");
1695         /* XXX no better code */
1696         IEEE80211_SEND_MGMT(ni, resp, IEEE80211_STATUS_MISSING_HT_CAPS);
1697         ieee80211_node_leave(ni);
1698 }
1699
1700 static void
1701 authalgreject(struct ieee80211_node *ni, const struct ieee80211_frame *wh,
1702         int algo, int seq, int status)
1703 {
1704         struct ieee80211vap *vap = ni->ni_vap;
1705
1706         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1707             wh, NULL, "unsupported alg %d", algo);
1708         vap->iv_stats.is_rx_auth_unsupported++;
1709         ieee80211_send_error(ni, wh->i_addr2, IEEE80211_FC0_SUBTYPE_AUTH,
1710             seq | (status << 16));
1711 }
1712
1713 static __inline int
1714 ishtmixed(const uint8_t *ie)
1715 {
1716         const struct ieee80211_ie_htinfo *ht =
1717             (const struct ieee80211_ie_htinfo *) ie;
1718         return (ht->hi_byte2 & IEEE80211_HTINFO_OPMODE) ==
1719             IEEE80211_HTINFO_OPMODE_MIXED;
1720 }
1721
1722 static int
1723 is11bclient(const uint8_t *rates, const uint8_t *xrates)
1724 {
1725         static const uint32_t brates = (1<<2*1)|(1<<2*2)|(1<<11)|(1<<2*11);
1726         int i;
1727
1728         /* NB: the 11b clients we care about will not have xrates */
1729         if (xrates != NULL || rates == NULL)
1730                 return 0;
1731         for (i = 0; i < rates[1]; i++) {
1732                 int r = rates[2+i] & IEEE80211_RATE_VAL;
1733                 if (r > 2*11 || ((1<<r) & brates) == 0)
1734                         return 0;
1735         }
1736         return 1;
1737 }
1738
1739 static void
1740 hostap_recv_mgmt(struct ieee80211_node *ni, struct mbuf *m0,
1741         int subtype, const struct ieee80211_rx_stats *rxs, int rssi, int nf)
1742 {
1743         struct ieee80211vap *vap = ni->ni_vap;
1744         struct ieee80211com *ic = ni->ni_ic;
1745         struct ieee80211_frame *wh;
1746         uint8_t *frm, *efrm, *sfrm;
1747         uint8_t *ssid, *rates, *xrates, *wpa, *rsn, *wme, *ath, *htcap;
1748         int reassoc, resp;
1749         uint8_t rate;
1750
1751         wh = mtod(m0, struct ieee80211_frame *);
1752         frm = (uint8_t *)&wh[1];
1753         efrm = mtod(m0, uint8_t *) + m0->m_len;
1754         switch (subtype) {
1755         case IEEE80211_FC0_SUBTYPE_PROBE_RESP:
1756                 /*
1757                  * We process beacon/probe response frames when scanning;
1758                  * otherwise we check beacon frames for overlapping non-ERP
1759                  * BSS in 11g and/or overlapping legacy BSS when in HT.
1760                  */
1761                 if ((ic->ic_flags & IEEE80211_F_SCAN) == 0) {
1762                         vap->iv_stats.is_rx_mgtdiscard++;
1763                         return;
1764                 }
1765                 /* FALLTHROUGH */
1766         case IEEE80211_FC0_SUBTYPE_BEACON: {
1767                 struct ieee80211_scanparams scan;
1768
1769                 /* NB: accept off-channel frames */
1770                 /* XXX TODO: use rxstatus to determine off-channel details */
1771                 if (ieee80211_parse_beacon(ni, m0, ic->ic_curchan, &scan) &~ IEEE80211_BPARSE_OFFCHAN)
1772                         return;
1773                 /*
1774                  * Count frame now that we know it's to be processed.
1775                  */
1776                 if (subtype == IEEE80211_FC0_SUBTYPE_BEACON) {
1777                         vap->iv_stats.is_rx_beacon++;           /* XXX remove */
1778                         IEEE80211_NODE_STAT(ni, rx_beacons);
1779                 } else
1780                         IEEE80211_NODE_STAT(ni, rx_proberesp);
1781                 /*
1782                  * If scanning, just pass information to the scan module.
1783                  */
1784                 if (ic->ic_flags & IEEE80211_F_SCAN) {
1785                         if (scan.status == 0 &&         /* NB: on channel */
1786                             (ic->ic_flags_ext & IEEE80211_FEXT_PROBECHAN)) {
1787                                 /*
1788                                  * Actively scanning a channel marked passive;
1789                                  * send a probe request now that we know there
1790                                  * is 802.11 traffic present.
1791                                  *
1792                                  * XXX check if the beacon we recv'd gives
1793                                  * us what we need and suppress the probe req
1794                                  */
1795                                 ieee80211_probe_curchan(vap, 1);
1796                                 ic->ic_flags_ext &= ~IEEE80211_FEXT_PROBECHAN;
1797                         }
1798                         ieee80211_add_scan(vap, ic->ic_curchan, &scan, wh,
1799                             subtype, rssi, nf);
1800                         return;
1801                 }
1802                 /*
1803                  * Check beacon for overlapping bss w/ non ERP stations.
1804                  * If we detect one and protection is configured but not
1805                  * enabled, enable it and start a timer that'll bring us
1806                  * out if we stop seeing the bss.
1807                  */
1808                 if (IEEE80211_IS_CHAN_ANYG(ic->ic_curchan) &&
1809                     scan.status == 0 &&                 /* NB: on-channel */
1810                     ((scan.erp & 0x100) == 0 ||         /* NB: no ERP, 11b sta*/
1811                      (scan.erp & IEEE80211_ERP_NON_ERP_PRESENT))) {
1812                         ic->ic_lastnonerp = ticks;
1813                         ic->ic_flags_ext |= IEEE80211_FEXT_NONERP_PR;
1814                         if (ic->ic_protmode != IEEE80211_PROT_NONE &&
1815                             (ic->ic_flags & IEEE80211_F_USEPROT) == 0) {
1816                                 IEEE80211_NOTE_FRAME(vap,
1817                                     IEEE80211_MSG_ASSOC, wh,
1818                                     "non-ERP present on channel %d "
1819                                     "(saw erp 0x%x from channel %d), "
1820                                     "enable use of protection",
1821                                     ic->ic_curchan->ic_ieee,
1822                                     scan.erp, scan.chan);
1823                                 ic->ic_flags |= IEEE80211_F_USEPROT;
1824                                 ieee80211_notify_erp(ic);
1825                         }
1826                 }
1827                 /*
1828                  * Check beacon for non-HT station on HT channel
1829                  * and update HT BSS occupancy as appropriate.
1830                  */
1831                 if (IEEE80211_IS_CHAN_HT(ic->ic_curchan)) {
1832                         if (scan.status & IEEE80211_BPARSE_OFFCHAN) {
1833                                 /*
1834                                  * Off control channel; only check frames
1835                                  * that come in the extension channel when
1836                                  * operating w/ HT40.
1837                                  */
1838                                 if (!IEEE80211_IS_CHAN_HT40(ic->ic_curchan))
1839                                         break;
1840                                 if (scan.chan != ic->ic_curchan->ic_extieee)
1841                                         break;
1842                         }
1843                         if (scan.htinfo == NULL) {
1844                                 ieee80211_htprot_update(ic,
1845                                     IEEE80211_HTINFO_OPMODE_PROTOPT |
1846                                     IEEE80211_HTINFO_NONHT_PRESENT);
1847                         } else if (ishtmixed(scan.htinfo)) {
1848                                 /* XXX? take NONHT_PRESENT from beacon? */
1849                                 ieee80211_htprot_update(ic,
1850                                     IEEE80211_HTINFO_OPMODE_MIXED |
1851                                     IEEE80211_HTINFO_NONHT_PRESENT);
1852                         }
1853                 }
1854                 break;
1855         }
1856
1857         case IEEE80211_FC0_SUBTYPE_PROBE_REQ:
1858                 if (vap->iv_state != IEEE80211_S_RUN) {
1859                         vap->iv_stats.is_rx_mgtdiscard++;
1860                         return;
1861                 }
1862                 /*
1863                  * Consult the ACL policy module if setup.
1864                  */
1865                 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1866                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1867                             wh, NULL, "%s", "disallowed by ACL");
1868                         vap->iv_stats.is_rx_acl++;
1869                         return;
1870                 }
1871                 /*
1872                  * prreq frame format
1873                  *      [tlv] ssid
1874                  *      [tlv] supported rates
1875                  *      [tlv] extended supported rates
1876                  */
1877                 ssid = rates = xrates = NULL;
1878                 while (efrm - frm > 1) {
1879                         IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
1880                         switch (*frm) {
1881                         case IEEE80211_ELEMID_SSID:
1882                                 ssid = frm;
1883                                 break;
1884                         case IEEE80211_ELEMID_RATES:
1885                                 rates = frm;
1886                                 break;
1887                         case IEEE80211_ELEMID_XRATES:
1888                                 xrates = frm;
1889                                 break;
1890                         }
1891                         frm += frm[1] + 2;
1892                 }
1893                 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
1894                 if (xrates != NULL)
1895                         IEEE80211_VERIFY_ELEMENT(xrates,
1896                                 IEEE80211_RATE_MAXSIZE - rates[1], return);
1897                 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
1898                 IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return);
1899                 if ((vap->iv_flags & IEEE80211_F_HIDESSID) && ssid[1] == 0) {
1900                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
1901                             wh, NULL,
1902                             "%s", "no ssid with ssid suppression enabled");
1903                         vap->iv_stats.is_rx_ssidmismatch++; /*XXX*/
1904                         return;
1905                 }
1906
1907                 /* XXX find a better class or define it's own */
1908                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_INPUT, wh->i_addr2,
1909                     "%s", "recv probe req");
1910                 /*
1911                  * Some legacy 11b clients cannot hack a complete
1912                  * probe response frame.  When the request includes
1913                  * only a bare-bones rate set, communicate this to
1914                  * the transmit side.
1915                  */
1916                 ieee80211_send_proberesp(vap, wh->i_addr2,
1917                     is11bclient(rates, xrates) ? IEEE80211_SEND_LEGACY_11B : 0);
1918                 break;
1919
1920         case IEEE80211_FC0_SUBTYPE_AUTH: {
1921                 uint16_t algo, seq, status;
1922
1923                 if (vap->iv_state != IEEE80211_S_RUN) {
1924                         vap->iv_stats.is_rx_mgtdiscard++;
1925                         return;
1926                 }
1927                 if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) {
1928                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
1929                             wh, NULL, "%s", "wrong bssid");
1930                         vap->iv_stats.is_rx_wrongbss++; /*XXX unique stat?*/
1931                         return;
1932                 }
1933                 /*
1934                  * auth frame format
1935                  *      [2] algorithm
1936                  *      [2] sequence
1937                  *      [2] status
1938                  *      [tlv*] challenge
1939                  */
1940                 IEEE80211_VERIFY_LENGTH(efrm - frm, 6, return);
1941                 algo   = le16toh(*(uint16_t *)frm);
1942                 seq    = le16toh(*(uint16_t *)(frm + 2));
1943                 status = le16toh(*(uint16_t *)(frm + 4));
1944                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_AUTH, wh->i_addr2,
1945                     "recv auth frame with algorithm %d seq %d", algo, seq);
1946                 /*
1947                  * Consult the ACL policy module if setup.
1948                  */
1949                 if (vap->iv_acl != NULL && !vap->iv_acl->iac_check(vap, wh)) {
1950                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ACL,
1951                             wh, NULL, "%s", "disallowed by ACL");
1952                         vap->iv_stats.is_rx_acl++;
1953                         ieee80211_send_error(ni, wh->i_addr2,
1954                             IEEE80211_FC0_SUBTYPE_AUTH,
1955                             (seq+1) | (IEEE80211_STATUS_UNSPECIFIED<<16));
1956                         return;
1957                 }
1958                 if (vap->iv_flags & IEEE80211_F_COUNTERM) {
1959                         IEEE80211_DISCARD(vap,
1960                             IEEE80211_MSG_AUTH | IEEE80211_MSG_CRYPTO,
1961                             wh, NULL, "%s", "TKIP countermeasures enabled");
1962                         vap->iv_stats.is_rx_auth_countermeasures++;
1963                         ieee80211_send_error(ni, wh->i_addr2,
1964                                 IEEE80211_FC0_SUBTYPE_AUTH,
1965                                 IEEE80211_REASON_MIC_FAILURE);
1966                         return;
1967                 }
1968                 if (algo == IEEE80211_AUTH_ALG_SHARED)
1969                         hostap_auth_shared(ni, wh, frm + 6, efrm, rssi, nf,
1970                             seq, status);
1971                 else if (algo == IEEE80211_AUTH_ALG_OPEN)
1972                         hostap_auth_open(ni, wh, rssi, nf, seq, status);
1973                 else if (algo == IEEE80211_AUTH_ALG_LEAP) {
1974                         authalgreject(ni, wh, algo,
1975                             seq+1, IEEE80211_STATUS_ALG);
1976                         return;
1977                 } else {
1978                         /*
1979                          * We assume that an unknown algorithm is the result
1980                          * of a decryption failure on a shared key auth frame;
1981                          * return a status code appropriate for that instead
1982                          * of IEEE80211_STATUS_ALG.
1983                          *
1984                          * NB: a seq# of 4 is intentional; the decrypted
1985                          *     frame likely has a bogus seq value.
1986                          */
1987                         authalgreject(ni, wh, algo,
1988                             4, IEEE80211_STATUS_CHALLENGE);
1989                         return;
1990                 }
1991                 break;
1992         }
1993
1994         case IEEE80211_FC0_SUBTYPE_ASSOC_REQ:
1995         case IEEE80211_FC0_SUBTYPE_REASSOC_REQ: {
1996                 uint16_t capinfo, lintval;
1997                 struct ieee80211_rsnparms rsnparms;
1998
1999                 if (vap->iv_state != IEEE80211_S_RUN) {
2000                         vap->iv_stats.is_rx_mgtdiscard++;
2001                         return;
2002                 }
2003                 if (!IEEE80211_ADDR_EQ(wh->i_addr3, vap->iv_bss->ni_bssid)) {
2004                         IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
2005                             wh, NULL, "%s", "wrong bssid");
2006                         vap->iv_stats.is_rx_assoc_bss++;
2007                         return;
2008                 }
2009                 if (subtype == IEEE80211_FC0_SUBTYPE_REASSOC_REQ) {
2010                         reassoc = 1;
2011                         resp = IEEE80211_FC0_SUBTYPE_REASSOC_RESP;
2012                 } else {
2013                         reassoc = 0;
2014                         resp = IEEE80211_FC0_SUBTYPE_ASSOC_RESP;
2015                 }
2016                 if (ni == vap->iv_bss) {
2017                         IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_ANY, wh->i_addr2,
2018                             "deny %s request, sta not authenticated",
2019                             reassoc ? "reassoc" : "assoc");
2020                         ieee80211_send_error(ni, wh->i_addr2,
2021                             IEEE80211_FC0_SUBTYPE_DEAUTH,
2022                             IEEE80211_REASON_ASSOC_NOT_AUTHED);
2023                         vap->iv_stats.is_rx_assoc_notauth++;
2024                         return;
2025                 }
2026
2027                 /*
2028                  * asreq frame format
2029                  *      [2] capability information
2030                  *      [2] listen interval
2031                  *      [6*] current AP address (reassoc only)
2032                  *      [tlv] ssid
2033                  *      [tlv] supported rates
2034                  *      [tlv] extended supported rates
2035                  *      [tlv] WPA or RSN
2036                  *      [tlv] HT capabilities
2037                  *      [tlv] Atheros capabilities
2038                  */
2039                 IEEE80211_VERIFY_LENGTH(efrm - frm, (reassoc ? 10 : 4), return);
2040                 capinfo = le16toh(*(uint16_t *)frm);    frm += 2;
2041                 lintval = le16toh(*(uint16_t *)frm);    frm += 2;
2042                 if (reassoc)
2043                         frm += 6;       /* ignore current AP info */
2044                 ssid = rates = xrates = wpa = rsn = wme = ath = htcap = NULL;
2045                 sfrm = frm;
2046                 while (efrm - frm > 1) {
2047                         IEEE80211_VERIFY_LENGTH(efrm - frm, frm[1] + 2, return);
2048                         switch (*frm) {
2049                         case IEEE80211_ELEMID_SSID:
2050                                 ssid = frm;
2051                                 break;
2052                         case IEEE80211_ELEMID_RATES:
2053                                 rates = frm;
2054                                 break;
2055                         case IEEE80211_ELEMID_XRATES:
2056                                 xrates = frm;
2057                                 break;
2058                         case IEEE80211_ELEMID_RSN:
2059                                 rsn = frm;
2060                                 break;
2061                         case IEEE80211_ELEMID_HTCAP:
2062                                 htcap = frm;
2063                                 break;
2064                         case IEEE80211_ELEMID_VENDOR:
2065                                 if (iswpaoui(frm))
2066                                         wpa = frm;
2067                                 else if (iswmeinfo(frm))
2068                                         wme = frm;
2069 #ifdef IEEE80211_SUPPORT_SUPERG
2070                                 else if (isatherosoui(frm))
2071                                         ath = frm;
2072 #endif
2073                                 else if (vap->iv_flags_ht & IEEE80211_FHT_HTCOMPAT) {
2074                                         if (ishtcapoui(frm) && htcap == NULL)
2075                                                 htcap = frm;
2076                                 }
2077                                 break;
2078                         }
2079                         frm += frm[1] + 2;
2080                 }
2081                 IEEE80211_VERIFY_ELEMENT(rates, IEEE80211_RATE_MAXSIZE, return);
2082                 if (xrates != NULL)
2083                         IEEE80211_VERIFY_ELEMENT(xrates,
2084                                 IEEE80211_RATE_MAXSIZE - rates[1], return);
2085                 IEEE80211_VERIFY_ELEMENT(ssid, IEEE80211_NWID_LEN, return);
2086                 IEEE80211_VERIFY_SSID(vap->iv_bss, ssid, return);
2087                 if (htcap != NULL) {
2088                         IEEE80211_VERIFY_LENGTH(htcap[1],
2089                              htcap[0] == IEEE80211_ELEMID_VENDOR ?
2090                                  4 + sizeof(struct ieee80211_ie_htcap)-2 :
2091                                  sizeof(struct ieee80211_ie_htcap)-2,
2092                              return);           /* XXX just NULL out? */
2093                 }
2094
2095                 if ((vap->iv_flags & IEEE80211_F_WPA) &&
2096                     !wpa_assocreq(ni, &rsnparms, wh, wpa, rsn, capinfo))
2097                         return;
2098                 /* discard challenge after association */
2099                 if (ni->ni_challenge != NULL) {
2100                         IEEE80211_FREE(ni->ni_challenge, M_80211_NODE);
2101                         ni->ni_challenge = NULL;
2102                 }
2103                 /* NB: 802.11 spec says to ignore station's privacy bit */
2104                 if ((capinfo & IEEE80211_CAPINFO_ESS) == 0) {
2105                         capinfomismatch(ni, wh, reassoc, resp,
2106                             "capability", capinfo);
2107                         return;
2108                 }
2109                 /*
2110                  * Disallow re-associate w/ invalid slot time setting.
2111                  */
2112                 if (ni->ni_associd != 0 &&
2113                     IEEE80211_IS_CHAN_ANYG(ic->ic_bsschan) &&
2114                     ((ni->ni_capinfo ^ capinfo) & IEEE80211_CAPINFO_SHORT_SLOTTIME)) {
2115                         capinfomismatch(ni, wh, reassoc, resp,
2116                             "slot time", capinfo);
2117                         return;
2118                 }
2119                 rate = ieee80211_setup_rates(ni, rates, xrates,
2120                                 IEEE80211_F_DOSORT | IEEE80211_F_DOFRATE |
2121                                 IEEE80211_F_DONEGO | IEEE80211_F_DODEL);
2122                 if (rate & IEEE80211_RATE_BASIC) {
2123                         ratesetmismatch(ni, wh, reassoc, resp, "legacy", rate);
2124                         vap->iv_stats.is_rx_assoc_norate++;
2125                         return;
2126                 }
2127                 /*
2128                  * If constrained to 11g-only stations reject an
2129                  * 11b-only station.  We cheat a bit here by looking
2130                  * at the max negotiated xmit rate and assuming anyone
2131                  * with a best rate <24Mb/s is an 11b station.
2132                  */
2133                 if ((vap->iv_flags & IEEE80211_F_PUREG) && rate < 48) {
2134                         ratesetmismatch(ni, wh, reassoc, resp, "11g", rate);
2135                         vap->iv_stats.is_rx_assoc_norate++;
2136                         return;
2137                 }
2138                 /*
2139                  * Do HT rate set handling and setup HT node state.
2140                  */
2141                 ni->ni_chan = vap->iv_bss->ni_chan;
2142                 if (IEEE80211_IS_CHAN_HT(ni->ni_chan) && htcap != NULL) {
2143                         rate = ieee80211_setup_htrates(ni, htcap,
2144                                 IEEE80211_F_DOFMCS | IEEE80211_F_DONEGO |
2145                                 IEEE80211_F_DOBRS);
2146                         if (rate & IEEE80211_RATE_BASIC) {
2147                                 ratesetmismatch(ni, wh, reassoc, resp,
2148                                     "HT", rate);
2149                                 vap->iv_stats.is_ht_assoc_norate++;
2150                                 return;
2151                         }
2152                         ieee80211_ht_node_init(ni);
2153                         ieee80211_ht_updatehtcap(ni, htcap);
2154                 } else if (ni->ni_flags & IEEE80211_NODE_HT)
2155                         ieee80211_ht_node_cleanup(ni);
2156 #ifdef IEEE80211_SUPPORT_SUPERG
2157                 /* Always do ff node cleanup; for A-MSDU */
2158                 ieee80211_ff_node_cleanup(ni);
2159 #endif
2160                 /*
2161                  * Allow AMPDU operation only with unencrypted traffic
2162                  * or AES-CCM; the 11n spec only specifies these ciphers
2163                  * so permitting any others is undefined and can lead
2164                  * to interoperability problems.
2165                  */
2166                 if ((ni->ni_flags & IEEE80211_NODE_HT) &&
2167                     (((vap->iv_flags & IEEE80211_F_WPA) &&
2168                       rsnparms.rsn_ucastcipher != IEEE80211_CIPHER_AES_CCM) ||
2169                      (vap->iv_flags & (IEEE80211_F_WPA|IEEE80211_F_PRIVACY)) == IEEE80211_F_PRIVACY)) {
2170                         IEEE80211_NOTE(vap,
2171                             IEEE80211_MSG_ASSOC | IEEE80211_MSG_11N, ni,
2172                             "disallow HT use because WEP or TKIP requested, "
2173                             "capinfo 0x%x ucastcipher %d", capinfo,
2174                             rsnparms.rsn_ucastcipher);
2175                         ieee80211_ht_node_cleanup(ni);
2176 #ifdef IEEE80211_SUPPORT_SUPERG
2177                         /* Always do ff node cleanup; for A-MSDU */
2178                         ieee80211_ff_node_cleanup(ni);
2179 #endif
2180                         vap->iv_stats.is_ht_assoc_downgrade++;
2181                 }
2182                 /*
2183                  * If constrained to 11n-only stations reject legacy stations.
2184                  */
2185                 if ((vap->iv_flags_ht & IEEE80211_FHT_PUREN) &&
2186                     (ni->ni_flags & IEEE80211_NODE_HT) == 0) {
2187                         htcapmismatch(ni, wh, reassoc, resp);
2188                         vap->iv_stats.is_ht_assoc_nohtcap++;
2189                         return;
2190                 }
2191                 IEEE80211_RSSI_LPF(ni->ni_avgrssi, rssi);
2192                 ni->ni_noise = nf;
2193                 ni->ni_intval = lintval;
2194                 ni->ni_capinfo = capinfo;
2195                 ni->ni_fhdwell = vap->iv_bss->ni_fhdwell;
2196                 ni->ni_fhindex = vap->iv_bss->ni_fhindex;
2197                 /*
2198                  * Store the IEs.
2199                  * XXX maybe better to just expand
2200                  */
2201                 if (ieee80211_ies_init(&ni->ni_ies, sfrm, efrm - sfrm)) {
2202 #define setie(_ie, _off)        ieee80211_ies_setie(ni->ni_ies, _ie, _off)
2203                         if (wpa != NULL)
2204                                 setie(wpa_ie, wpa - sfrm);
2205                         if (rsn != NULL)
2206                                 setie(rsn_ie, rsn - sfrm);
2207                         if (htcap != NULL)
2208                                 setie(htcap_ie, htcap - sfrm);
2209                         if (wme != NULL) {
2210                                 setie(wme_ie, wme - sfrm);
2211                                 /*
2212                                  * Mark node as capable of QoS.
2213                                  */
2214                                 ni->ni_flags |= IEEE80211_NODE_QOS;
2215                         } else
2216                                 ni->ni_flags &= ~IEEE80211_NODE_QOS;
2217 #ifdef IEEE80211_SUPPORT_SUPERG
2218                         if (ath != NULL) {
2219                                 setie(ath_ie, ath - sfrm);
2220                                 /*
2221                                  * Parse ATH station parameters.
2222                                  */
2223                                 ieee80211_parse_ath(ni, ni->ni_ies.ath_ie);
2224                         } else
2225 #endif
2226                                 ni->ni_ath_flags = 0;
2227 #undef setie
2228                 } else {
2229                         ni->ni_flags &= ~IEEE80211_NODE_QOS;
2230                         ni->ni_ath_flags = 0;
2231                 }
2232                 ieee80211_node_join(ni, resp);
2233                 ieee80211_deliver_l2uf(ni);
2234                 break;
2235         }
2236
2237         case IEEE80211_FC0_SUBTYPE_DEAUTH:
2238         case IEEE80211_FC0_SUBTYPE_DISASSOC: {
2239                 uint16_t reason;
2240
2241                 if (vap->iv_state != IEEE80211_S_RUN ||
2242                     /* NB: can happen when in promiscuous mode */
2243                     !IEEE80211_ADDR_EQ(wh->i_addr1, vap->iv_myaddr)) {
2244                         vap->iv_stats.is_rx_mgtdiscard++;
2245                         break;
2246                 }
2247                 /*
2248                  * deauth/disassoc frame format
2249                  *      [2] reason
2250                  */
2251                 IEEE80211_VERIFY_LENGTH(efrm - frm, 2, return);
2252                 reason = le16toh(*(uint16_t *)frm);
2253                 if (subtype == IEEE80211_FC0_SUBTYPE_DEAUTH) {
2254                         vap->iv_stats.is_rx_deauth++;
2255                         IEEE80211_NODE_STAT(ni, rx_deauth);
2256                 } else {
2257                         vap->iv_stats.is_rx_disassoc++;
2258                         IEEE80211_NODE_STAT(ni, rx_disassoc);
2259                 }
2260                 IEEE80211_NOTE(vap, IEEE80211_MSG_AUTH, ni,
2261                     "recv %s (reason: %d (%s))",
2262                     ieee80211_mgt_subtype_name(subtype),
2263                     reason, ieee80211_reason_to_string(reason));
2264                 if (ni != vap->iv_bss)
2265                         ieee80211_node_leave(ni);
2266                 break;
2267         }
2268
2269         case IEEE80211_FC0_SUBTYPE_ACTION:
2270         case IEEE80211_FC0_SUBTYPE_ACTION_NOACK:
2271                 if (ni == vap->iv_bss) {
2272                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2273                             wh, NULL, "%s", "unknown node");
2274                         vap->iv_stats.is_rx_mgtdiscard++;
2275                 } else if (!IEEE80211_ADDR_EQ(vap->iv_myaddr, wh->i_addr1) &&
2276                     !IEEE80211_IS_MULTICAST(wh->i_addr1)) {
2277                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2278                             wh, NULL, "%s", "not for us");
2279                         vap->iv_stats.is_rx_mgtdiscard++;
2280                 } else if (vap->iv_state != IEEE80211_S_RUN) {
2281                         IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2282                             wh, NULL, "wrong state %s",
2283                             ieee80211_state_name[vap->iv_state]);
2284                         vap->iv_stats.is_rx_mgtdiscard++;
2285                 } else {
2286                         if (ieee80211_parse_action(ni, m0) == 0)
2287                                 (void)ic->ic_recv_action(ni, wh, frm, efrm);
2288                 }
2289                 break;
2290
2291         case IEEE80211_FC0_SUBTYPE_ASSOC_RESP:
2292         case IEEE80211_FC0_SUBTYPE_REASSOC_RESP:
2293         case IEEE80211_FC0_SUBTYPE_TIMING_ADV:
2294         case IEEE80211_FC0_SUBTYPE_ATIM:
2295                 IEEE80211_DISCARD(vap, IEEE80211_MSG_INPUT,
2296                     wh, NULL, "%s", "not handled");
2297                 vap->iv_stats.is_rx_mgtdiscard++;
2298                 break;
2299
2300         default:
2301                 IEEE80211_DISCARD(vap, IEEE80211_MSG_ANY,
2302                     wh, "mgt", "subtype 0x%x not handled", subtype);
2303                 vap->iv_stats.is_rx_badsubtype++;
2304                 break;
2305         }
2306 }
2307
2308 static void
2309 hostap_recv_ctl(struct ieee80211_node *ni, struct mbuf *m, int subtype)
2310 {
2311         switch (subtype) {
2312         case IEEE80211_FC0_SUBTYPE_PS_POLL:
2313                 ni->ni_vap->iv_recv_pspoll(ni, m);
2314                 break;
2315         case IEEE80211_FC0_SUBTYPE_BAR:
2316                 ieee80211_recv_bar(ni, m);
2317                 break;
2318         }
2319 }
2320
2321 /*
2322  * Process a received ps-poll frame.
2323  */
2324 void
2325 ieee80211_recv_pspoll(struct ieee80211_node *ni, struct mbuf *m0)
2326 {
2327         struct ieee80211vap *vap = ni->ni_vap;
2328         struct ieee80211com *ic = vap->iv_ic;
2329         struct ieee80211_frame_min *wh;
2330         struct mbuf *m;
2331         uint16_t aid;
2332         int qlen;
2333
2334         wh = mtod(m0, struct ieee80211_frame_min *);
2335         if (ni->ni_associd == 0) {
2336                 IEEE80211_DISCARD(vap,
2337                     IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG,
2338                     (struct ieee80211_frame *) wh, NULL,
2339                     "%s", "unassociated station");
2340                 vap->iv_stats.is_ps_unassoc++;
2341                 IEEE80211_SEND_MGMT(ni, IEEE80211_FC0_SUBTYPE_DEAUTH,
2342                         IEEE80211_REASON_NOT_ASSOCED);
2343                 return;
2344         }
2345
2346         aid = le16toh(*(uint16_t *)wh->i_dur);
2347         if (aid != ni->ni_associd) {
2348                 IEEE80211_DISCARD(vap,
2349                     IEEE80211_MSG_POWER | IEEE80211_MSG_DEBUG,
2350                     (struct ieee80211_frame *) wh, NULL,
2351                     "aid mismatch: sta aid 0x%x poll aid 0x%x",
2352                     ni->ni_associd, aid);
2353                 vap->iv_stats.is_ps_badaid++;
2354                 /*
2355                  * NB: We used to deauth the station but it turns out
2356                  * the Blackberry Curve 8230 (and perhaps other devices)
2357                  * sometimes send the wrong AID when WME is negotiated.
2358                  * Being more lenient here seems ok as we already check
2359                  * the station is associated and we only return frames
2360                  * queued for the station (i.e. we don't use the AID).
2361                  */
2362                 return;
2363         }
2364
2365         /* Okay, take the first queued packet and put it out... */
2366         m = ieee80211_node_psq_dequeue(ni, &qlen);
2367         if (m == NULL) {
2368                 IEEE80211_NOTE_MAC(vap, IEEE80211_MSG_POWER, wh->i_addr2,
2369                     "%s", "recv ps-poll, but queue empty");
2370                 ieee80211_send_nulldata(ieee80211_ref_node(ni));
2371                 vap->iv_stats.is_ps_qempty++;   /* XXX node stat */
2372                 if (vap->iv_set_tim != NULL)
2373                         vap->iv_set_tim(ni, 0); /* just in case */
2374                 return;
2375         }
2376         /*
2377          * If there are more packets, set the more packets bit
2378          * in the packet dispatched to the station; otherwise
2379          * turn off the TIM bit.
2380          */
2381         if (qlen != 0) {
2382                 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni,
2383                     "recv ps-poll, send packet, %u still queued", qlen);
2384                 m->m_flags |= M_MORE_DATA;
2385         } else {
2386                 IEEE80211_NOTE(vap, IEEE80211_MSG_POWER, ni,
2387                     "%s", "recv ps-poll, send packet, queue empty");
2388                 if (vap->iv_set_tim != NULL)
2389                         vap->iv_set_tim(ni, 0);
2390         }
2391         m->m_flags |= M_PWR_SAV;                /* bypass PS handling */
2392
2393         /*
2394          * Do the right thing; if it's an encap'ed frame then
2395          * call ieee80211_parent_xmitpkt() else
2396          * call ieee80211_vap_xmitpkt().
2397          */
2398         if (m->m_flags & M_ENCAP) {
2399                 (void) ieee80211_parent_xmitpkt(ic, m);
2400         } else {
2401                 (void) ieee80211_vap_xmitpkt(vap, m);
2402         }
2403 }