net/ieee80211/ieee80211_rx.c

   1 /*
   2  * Original code based Host AP (software wireless LAN access point) driver
   3  * for Intersil Prism2/2.5/3 - hostap.o module, common routines
   4  *
   5  * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
   6  * <jkmaline@cc.hut.fi>
   7  * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
   8  * Copyright (c) 2004-2005, Intel Corporation
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation. See README and COPYING for
  13  * more details.
  14  */
  15
  16 #include <linux/compiler.h>
  17 #include <linux/errno.h>
  18 #include <linux/if_arp.h>
  19 #include <linux/in6.h>
  20 #include <linux/in.h>
  21 #include <linux/ip.h>
  22 #include <linux/kernel.h>
  23 #include <linux/module.h>
  24 #include <linux/netdevice.h>
  25 #include <linux/proc_fs.h>
  26 #include <linux/skbuff.h>
  27 #include <linux/slab.h>
  28 #include <linux/tcp.h>
  29 #include <linux/types.h>
  30 #include <linux/wireless.h>
  31 #include <linux/etherdevice.h>
  32 #include <asm/uaccess.h>
  33 #include <linux/ctype.h>
  34
  35 #include <net/ieee80211.h>
  36
  37 static void ieee80211_monitor_rx(struct ieee80211_device *ieee,
  38                                         struct sk_buff *skb,
  39                                         struct ieee80211_rx_stats *rx_stats)
  40 {
  41         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
  42         u16 fc = le16_to_cpu(hdr->frame_ctl);
  43
  44         skb->dev = ieee->dev;
  45         skb->mac.raw = skb->data;
  46         skb_pull(skb, ieee80211_get_hdrlen(fc));
  47         skb->pkt_type = PACKET_OTHERHOST;
  48         skb->protocol = __constant_htons(ETH_P_80211_RAW);
  49         memset(skb->cb, 0, sizeof(skb->cb));
  50         netif_rx(skb);
  51 }
  52
  53 /* Called only as a tasklet (software IRQ) */
  54 static struct ieee80211_frag_entry *ieee80211_frag_cache_find(struct
  55                                                               ieee80211_device
  56                                                               *ieee,
  57                                                               unsigned int seq,
  58                                                               unsigned int frag,
  59                                                               u8 * src,
  60                                                               u8 * dst)
  61 {
  62         struct ieee80211_frag_entry *entry;
  63         int i;
  64
  65         for (i = 0; i < IEEE80211_FRAG_CACHE_LEN; i++) {
  66                 entry = &ieee->frag_cache[i];
  67                 if (entry->skb != NULL &&
  68                     time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
  69                         IEEE80211_DEBUG_FRAG("expiring fragment cache entry "
  70                                              "seq=%u last_frag=%u\n",
  71                                              entry->seq, entry->last_frag);
  72                         dev_kfree_skb_any(entry->skb);
  73                         entry->skb = NULL;
  74                 }
  75
  76                 if (entry->skb != NULL && entry->seq == seq &&
  77                     (entry->last_frag + 1 == frag || frag == -1) &&
  78                     !compare_ether_addr(entry->src_addr, src) &&
  79                     !compare_ether_addr(entry->dst_addr, dst))
  80                         return entry;
  81         }
  82
  83         return NULL;
  84 }
  85
  86 /* Called only as a tasklet (software IRQ) */
  87 static struct sk_buff *ieee80211_frag_cache_get(struct ieee80211_device *ieee,
  88                                                 struct ieee80211_hdr_4addr *hdr)
  89 {
  90         struct sk_buff *skb = NULL;
  91         u16 sc;
  92         unsigned int frag, seq;
  93         struct ieee80211_frag_entry *entry;
  94
  95         sc = le16_to_cpu(hdr->seq_ctl);
  96         frag = WLAN_GET_SEQ_FRAG(sc);
  97         seq = WLAN_GET_SEQ_SEQ(sc);
  98
  99         if (frag == 0) {
 100                 /* Reserve enough space to fit maximum frame length */
 101                 skb = dev_alloc_skb(ieee->dev->mtu +
 102                                     sizeof(struct ieee80211_hdr_4addr) +
 103                                     8 /* LLC */  +
 104                                     2 /* alignment */  +
 105                                     8 /* WEP */  + ETH_ALEN /* WDS */ );
 106                 if (skb == NULL)
 107                         return NULL;
 108
 109                 entry = &ieee->frag_cache[ieee->frag_next_idx];
 110                 ieee->frag_next_idx++;
 111                 if (ieee->frag_next_idx >= IEEE80211_FRAG_CACHE_LEN)
 112                         ieee->frag_next_idx = 0;
 113
 114                 if (entry->skb != NULL)
 115                         dev_kfree_skb_any(entry->skb);
 116
 117                 entry->first_frag_time = jiffies;
 118                 entry->seq = seq;
 119                 entry->last_frag = frag;
 120                 entry->skb = skb;
 121                 memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
 122                 memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
 123         } else {
 124                 /* received a fragment of a frame for which the head fragment
 125                  * should have already been received */
 126                 entry = ieee80211_frag_cache_find(ieee, seq, frag, hdr->addr2,
 127                                                   hdr->addr1);
 128                 if (entry != NULL) {
 129                         entry->last_frag = frag;
 130                         skb = entry->skb;
 131                 }
 132         }
 133
 134         return skb;
 135 }
 136
 137 /* Called only as a tasklet (software IRQ) */
 138 static int ieee80211_frag_cache_invalidate(struct ieee80211_device *ieee,
 139                                            struct ieee80211_hdr_4addr *hdr)
 140 {
 141         u16 sc;
 142         unsigned int seq;
 143         struct ieee80211_frag_entry *entry;
 144
 145         sc = le16_to_cpu(hdr->seq_ctl);
 146         seq = WLAN_GET_SEQ_SEQ(sc);
 147
 148         entry = ieee80211_frag_cache_find(ieee, seq, -1, hdr->addr2,
 149                                           hdr->addr1);
 150
 151         if (entry == NULL) {
 152                 IEEE80211_DEBUG_FRAG("could not invalidate fragment cache "
 153                                      "entry (seq=%u)\n", seq);
 154                 return -1;
 155         }
 156
 157         entry->skb = NULL;
 158         return 0;
 159 }
 160
 161 #ifdef NOT_YET
 162 /* ieee80211_rx_frame_mgtmt
 163  *
 164  * Responsible for handling management control frames
 165  *
 166  * Called by ieee80211_rx */
 167 static int
 168 ieee80211_rx_frame_mgmt(struct ieee80211_device *ieee, struct sk_buff *skb,
 169                         struct ieee80211_rx_stats *rx_stats, u16 type,
 170                         u16 stype)
 171 {
 172         if (ieee->iw_mode == IW_MODE_MASTER) {
 173                 printk(KERN_DEBUG "%s: Master mode not yet suppported.\n",
 174                        ieee->dev->name);
 175                 return 0;
 176 /*
 177   hostap_update_sta_ps(ieee, (struct hostap_ieee80211_hdr_4addr *)
 178   skb->data);*/
 179         }
 180
 181         if (ieee->hostapd && type == WLAN_FC_TYPE_MGMT) {
 182                 if (stype == WLAN_FC_STYPE_BEACON &&
 183                     ieee->iw_mode == IW_MODE_MASTER) {
 184                         struct sk_buff *skb2;
 185                         /* Process beacon frames also in kernel driver to
 186                          * update STA(AP) table statistics */
 187                         skb2 = skb_clone(skb, GFP_ATOMIC);
 188                         if (skb2)
 189                                 hostap_rx(skb2->dev, skb2, rx_stats);
 190                 }
 191
 192                 /* send management frames to the user space daemon for
 193                  * processing */
 194                 ieee->apdevstats.rx_packets++;
 195                 ieee->apdevstats.rx_bytes += skb->len;
 196                 prism2_rx_80211(ieee->apdev, skb, rx_stats, PRISM2_RX_MGMT);
 197                 return 0;
 198         }
 199
 200         if (ieee->iw_mode == IW_MODE_MASTER) {
 201                 if (type != WLAN_FC_TYPE_MGMT && type != WLAN_FC_TYPE_CTRL) {
 202                         printk(KERN_DEBUG "%s: unknown management frame "
 203                                "(type=0x%02x, stype=0x%02x) dropped\n",
 204                                skb->dev->name, type, stype);
 205                         return -1;
 206                 }
 207
 208                 hostap_rx(skb->dev, skb, rx_stats);
 209                 return 0;
 210         }
 211
 212         printk(KERN_DEBUG "%s: hostap_rx_frame_mgmt: management frame "
 213                "received in non-Host AP mode\n", skb->dev->name);
 214         return -1;
 215 }
 216 #endif
 217
 218 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
 219 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
 220 static unsigned char rfc1042_header[] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
 221
 222 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
 223 static unsigned char bridge_tunnel_header[] =
 224     { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
 225 /* No encapsulation header if EtherType < 0x600 (=length) */
 226
 227 /* Called by ieee80211_rx_frame_decrypt */
 228 static int ieee80211_is_eapol_frame(struct ieee80211_device *ieee,
 229                                     struct sk_buff *skb)
 230 {
 231         struct net_device *dev = ieee->dev;
 232         u16 fc, ethertype;
 233         struct ieee80211_hdr_3addr *hdr;
 234         u8 *pos;
 235
 236         if (skb->len < 24)
 237                 return 0;
 238
 239         hdr = (struct ieee80211_hdr_3addr *)skb->data;
 240         fc = le16_to_cpu(hdr->frame_ctl);
 241
 242         /* check that the frame is unicast frame to us */
 243         if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 244             IEEE80211_FCTL_TODS &&
 245             !compare_ether_addr(hdr->addr1, dev->dev_addr) &&
 246             !compare_ether_addr(hdr->addr3, dev->dev_addr)) {
 247                 /* ToDS frame with own addr BSSID and DA */
 248         } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 249                    IEEE80211_FCTL_FROMDS &&
 250                    !compare_ether_addr(hdr->addr1, dev->dev_addr)) {
 251                 /* FromDS frame with own addr as DA */
 252         } else
 253                 return 0;
 254
 255         if (skb->len < 24 + 8)
 256                 return 0;
 257
 258         /* check for port access entity Ethernet type */
 259         pos = skb->data + 24;
 260         ethertype = (pos[6] << 8) | pos[7];
 261         if (ethertype == ETH_P_PAE)
 262                 return 1;
 263
 264         return 0;
 265 }
 266
 267 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
 268 static int
 269 ieee80211_rx_frame_decrypt(struct ieee80211_device *ieee, struct sk_buff *skb,
 270                            struct ieee80211_crypt_data *crypt)
 271 {
 272         struct ieee80211_hdr_3addr *hdr;
 273         int res, hdrlen;
 274
 275         if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
 276                 return 0;
 277
 278         hdr = (struct ieee80211_hdr_3addr *)skb->data;
 279         hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 280
 281         atomic_inc(&crypt->refcnt);
 282         res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
 283         atomic_dec(&crypt->refcnt);
 284         if (res < 0) {
 285                 IEEE80211_DEBUG_DROP("decryption failed (SA=" MAC_FMT
 286                                      ") res=%d\n", MAC_ARG(hdr->addr2), res);
 287                 if (res == -2)
 288                         IEEE80211_DEBUG_DROP("Decryption failed ICV "
 289                                              "mismatch (key %d)\n",
 290                                              skb->data[hdrlen + 3] >> 6);
 291                 ieee->ieee_stats.rx_discards_undecryptable++;
 292                 return -1;
 293         }
 294
 295         return res;
 296 }
 297
 298 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
 299 static int
 300 ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device *ieee,
 301                                 struct sk_buff *skb, int keyidx,
 302                                 struct ieee80211_crypt_data *crypt)
 303 {
 304         struct ieee80211_hdr_3addr *hdr;
 305         int res, hdrlen;
 306
 307         if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
 308                 return 0;
 309
 310         hdr = (struct ieee80211_hdr_3addr *)skb->data;
 311         hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 312
 313         atomic_inc(&crypt->refcnt);
 314         res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
 315         atomic_dec(&crypt->refcnt);
 316         if (res < 0) {
 317                 printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
 318                        " (SA=" MAC_FMT " keyidx=%d)\n",
 319                        ieee->dev->name, MAC_ARG(hdr->addr2), keyidx);
 320                 return -1;
 321         }
 322
 323         return 0;
 324 }
 325
 326 /* All received frames are sent to this function. @skb contains the frame in
 327  * IEEE 802.11 format, i.e., in the format it was sent over air.
 328  * This function is called only as a tasklet (software IRQ). */
 329 int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
 330                  struct ieee80211_rx_stats *rx_stats)
 331 {
 332         struct net_device *dev = ieee->dev;
 333         struct ieee80211_hdr_4addr *hdr;
 334         size_t hdrlen;
 335         u16 fc, type, stype, sc;
 336         struct net_device_stats *stats;
 337         unsigned int frag;
 338         u8 *payload;
 339         u16 ethertype;
 340 #ifdef NOT_YET
 341         struct net_device *wds = NULL;
 342         struct sk_buff *skb2 = NULL;
 343         struct net_device *wds = NULL;
 344         int frame_authorized = 0;
 345         int from_assoc_ap = 0;
 346         void *sta = NULL;
 347 #endif
 348         u8 dst[ETH_ALEN];
 349         u8 src[ETH_ALEN];
 350         struct ieee80211_crypt_data *crypt = NULL;
 351         int keyidx = 0;
 352         int can_be_decrypted = 0;
 353
 354         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 355         stats = &ieee->stats;
 356
 357         if (skb->len < 10) {
 358                 printk(KERN_INFO "%s: SKB length < 10\n", dev->name);
 359                 goto rx_dropped;
 360         }
 361
 362         fc = le16_to_cpu(hdr->frame_ctl);
 363         type = WLAN_FC_GET_TYPE(fc);
 364         stype = WLAN_FC_GET_STYPE(fc);
 365         sc = le16_to_cpu(hdr->seq_ctl);
 366         frag = WLAN_GET_SEQ_FRAG(sc);
 367         hdrlen = ieee80211_get_hdrlen(fc);
 368
 369         /* Put this code here so that we avoid duplicating it in all
 370          * Rx paths. - Jean II */
 371 #ifdef IW_WIRELESS_SPY          /* defined in iw_handler.h */
 372         /* If spy monitoring on */
 373         if (ieee->spy_data.spy_number > 0) {
 374                 struct iw_quality wstats;
 375
 376                 wstats.updated = 0;
 377                 if (rx_stats->mask & IEEE80211_STATMASK_RSSI) {
 378                         wstats.level = rx_stats->rssi;
 379                         wstats.updated |= IW_QUAL_LEVEL_UPDATED;
 380                 } else
 381                         wstats.updated |= IW_QUAL_LEVEL_INVALID;
 382
 383                 if (rx_stats->mask & IEEE80211_STATMASK_NOISE) {
 384                         wstats.noise = rx_stats->noise;
 385                         wstats.updated |= IW_QUAL_NOISE_UPDATED;
 386                 } else
 387                         wstats.updated |= IW_QUAL_NOISE_INVALID;
 388
 389                 if (rx_stats->mask & IEEE80211_STATMASK_SIGNAL) {
 390                         wstats.qual = rx_stats->signal;
 391                         wstats.updated |= IW_QUAL_QUAL_UPDATED;
 392                 } else
 393                         wstats.updated |= IW_QUAL_QUAL_INVALID;
 394
 395                 /* Update spy records */
 396                 wireless_spy_update(ieee->dev, hdr->addr2, &wstats);
 397         }
 398 #endif                          /* IW_WIRELESS_SPY */
 399
 400 #ifdef NOT_YET
 401         hostap_update_rx_stats(local->ap, hdr, rx_stats);
 402 #endif
 403
 404         if (ieee->iw_mode == IW_MODE_MONITOR) {
 405                 ieee80211_monitor_rx(ieee, skb, rx_stats);
 406                 stats->rx_packets++;
 407                 stats->rx_bytes += skb->len;
 408                 return 1;
 409         }
 410
 411         can_be_decrypted = (is_multicast_ether_addr(hdr->addr1) ||
 412                             is_broadcast_ether_addr(hdr->addr2)) ?
 413             ieee->host_mc_decrypt : ieee->host_decrypt;
 414
 415         if (can_be_decrypted) {
 416                 int idx = 0;
 417                 if (skb->len >= hdrlen + 3) {
 418                         /* Top two-bits of byte 3 are the key index */
 419                         idx = skb->data[hdrlen + 3] >> 6;
 420                 }
 421
 422                 /* ieee->crypt[] is WEP_KEY (4) in length.  Given that idx
 423                  * is only allowed 2-bits of storage, no value of idx can
 424                  * be provided via above code that would result in idx
 425                  * being out of range */
 426                 crypt = ieee->crypt[idx];
 427
 428 #ifdef NOT_YET
 429                 sta = NULL;
 430
 431                 /* Use station specific key to override default keys if the
 432                  * receiver address is a unicast address ("individual RA"). If
 433                  * bcrx_sta_key parameter is set, station specific key is used
 434                  * even with broad/multicast targets (this is against IEEE
 435                  * 802.11, but makes it easier to use different keys with
 436                  * stations that do not support WEP key mapping). */
 437
 438                 if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key)
 439                         (void)hostap_handle_sta_crypto(local, hdr, &crypt,
 440                                                        &sta);
 441 #endif
 442
 443                 /* allow NULL decrypt to indicate an station specific override
 444                  * for default encryption */
 445                 if (crypt && (crypt->ops == NULL ||
 446                               crypt->ops->decrypt_mpdu == NULL))
 447                         crypt = NULL;
 448
 449                 if (!crypt && (fc & IEEE80211_FCTL_PROTECTED)) {
 450                         /* This seems to be triggered by some (multicast?)
 451                          * frames from other than current BSS, so just drop the
 452                          * frames silently instead of filling system log with
 453                          * these reports. */
 454                         IEEE80211_DEBUG_DROP("Decryption failed (not set)"
 455                                              " (SA=" MAC_FMT ")\n",
 456                                              MAC_ARG(hdr->addr2));
 457                         ieee->ieee_stats.rx_discards_undecryptable++;
 458                         goto rx_dropped;
 459                 }
 460         }
 461 #ifdef NOT_YET
 462         if (type != WLAN_FC_TYPE_DATA) {
 463                 if (type == WLAN_FC_TYPE_MGMT && stype == WLAN_FC_STYPE_AUTH &&
 464                     fc & IEEE80211_FCTL_PROTECTED && ieee->host_decrypt &&
 465                     (keyidx = hostap_rx_frame_decrypt(ieee, skb, crypt)) < 0) {
 466                         printk(KERN_DEBUG "%s: failed to decrypt mgmt::auth "
 467                                "from " MAC_FMT "\n", dev->name,
 468                                MAC_ARG(hdr->addr2));
 469                         /* TODO: could inform hostapd about this so that it
 470                          * could send auth failure report */
 471                         goto rx_dropped;
 472                 }
 473
 474                 if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
 475                         goto rx_dropped;
 476                 else
 477                         goto rx_exit;
 478         }
 479 #endif
 480
 481         /* Data frame - extract src/dst addresses */
 482         if (skb->len < IEEE80211_3ADDR_LEN)
 483                 goto rx_dropped;
 484
 485         switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
 486         case IEEE80211_FCTL_FROMDS:
 487                 memcpy(dst, hdr->addr1, ETH_ALEN);
 488                 memcpy(src, hdr->addr3, ETH_ALEN);
 489                 break;
 490         case IEEE80211_FCTL_TODS:
 491                 memcpy(dst, hdr->addr3, ETH_ALEN);
 492                 memcpy(src, hdr->addr2, ETH_ALEN);
 493                 break;
 494         case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
 495                 if (skb->len < IEEE80211_4ADDR_LEN)
 496                         goto rx_dropped;
 497                 memcpy(dst, hdr->addr3, ETH_ALEN);
 498                 memcpy(src, hdr->addr4, ETH_ALEN);
 499                 break;
 500         case 0:
 501                 memcpy(dst, hdr->addr1, ETH_ALEN);
 502                 memcpy(src, hdr->addr2, ETH_ALEN);
 503                 break;
 504         }
 505
 506 #ifdef NOT_YET
 507         if (hostap_rx_frame_wds(ieee, hdr, fc, &wds))
 508                 goto rx_dropped;
 509         if (wds) {
 510                 skb->dev = dev = wds;
 511                 stats = hostap_get_stats(dev);
 512         }
 513
 514         if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
 515             (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 516             IEEE80211_FCTL_FROMDS && ieee->stadev
 517             && !compare_ether_addr(hdr->addr2, ieee->assoc_ap_addr)) {
 518                 /* Frame from BSSID of the AP for which we are a client */
 519                 skb->dev = dev = ieee->stadev;
 520                 stats = hostap_get_stats(dev);
 521                 from_assoc_ap = 1;
 522         }
 523 #endif
 524
 525         dev->last_rx = jiffies;
 526
 527 #ifdef NOT_YET
 528         if ((ieee->iw_mode == IW_MODE_MASTER ||
 529              ieee->iw_mode == IW_MODE_REPEAT) && !from_assoc_ap) {
 530                 switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats,
 531                                              wds != NULL)) {
 532                 case AP_RX_CONTINUE_NOT_AUTHORIZED:
 533                         frame_authorized = 0;
 534                         break;
 535                 case AP_RX_CONTINUE:
 536                         frame_authorized = 1;
 537                         break;
 538                 case AP_RX_DROP:
 539                         goto rx_dropped;
 540                 case AP_RX_EXIT:
 541                         goto rx_exit;
 542                 }
 543         }
 544 #endif
 545
 546         /* Nullfunc frames may have PS-bit set, so they must be passed to
 547          * hostap_handle_sta_rx() before being dropped here. */
 548
 549         stype &= ~IEEE80211_STYPE_QOS_DATA;
 550
 551         if (stype != IEEE80211_STYPE_DATA &&
 552             stype != IEEE80211_STYPE_DATA_CFACK &&
 553             stype != IEEE80211_STYPE_DATA_CFPOLL &&
 554             stype != IEEE80211_STYPE_DATA_CFACKPOLL) {
 555                 if (stype != IEEE80211_STYPE_NULLFUNC)
 556                         IEEE80211_DEBUG_DROP("RX: dropped data frame "
 557                                              "with no data (type=0x%02x, "
 558                                              "subtype=0x%02x, len=%d)\n",
 559                                              type, stype, skb->len);
 560                 goto rx_dropped;
 561         }
 562
 563         /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
 564
 565         if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
 566             (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0)
 567                 goto rx_dropped;
 568
 569         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 570
 571         /* skb: hdr + (possibly fragmented) plaintext payload */
 572         // PR: FIXME: hostap has additional conditions in the "if" below:
 573         // ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
 574         if ((frag != 0) || (fc & IEEE80211_FCTL_MOREFRAGS)) {
 575                 int flen;
 576                 struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr);
 577                 IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
 578
 579                 if (!frag_skb) {
 580                         IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG,
 581                                         "Rx cannot get skb from fragment "
 582                                         "cache (morefrag=%d seq=%u frag=%u)\n",
 583                                         (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
 584                                         WLAN_GET_SEQ_SEQ(sc), frag);
 585                         goto rx_dropped;
 586                 }
 587
 588                 flen = skb->len;
 589                 if (frag != 0)
 590                         flen -= hdrlen;
 591
 592                 if (frag_skb->tail + flen > frag_skb->end) {
 593                         printk(KERN_WARNING "%s: host decrypted and "
 594                                "reassembled frame did not fit skb\n",
 595                                dev->name);
 596                         ieee80211_frag_cache_invalidate(ieee, hdr);
 597                         goto rx_dropped;
 598                 }
 599
 600                 if (frag == 0) {
 601                         /* copy first fragment (including full headers) into
 602                          * beginning of the fragment cache skb */
 603                         memcpy(skb_put(frag_skb, flen), skb->data, flen);
 604                 } else {
 605                         /* append frame payload to the end of the fragment
 606                          * cache skb */
 607                         memcpy(skb_put(frag_skb, flen), skb->data + hdrlen,
 608                                flen);
 609                 }
 610                 dev_kfree_skb_any(skb);
 611                 skb = NULL;
 612
 613                 if (fc & IEEE80211_FCTL_MOREFRAGS) {
 614                         /* more fragments expected - leave the skb in fragment
 615                          * cache for now; it will be delivered to upper layers
 616                          * after all fragments have been received */
 617                         goto rx_exit;
 618                 }
 619
 620                 /* this was the last fragment and the frame will be
 621                  * delivered, so remove skb from fragment cache */
 622                 skb = frag_skb;
 623                 hdr = (struct ieee80211_hdr_4addr *)skb->data;
 624                 ieee80211_frag_cache_invalidate(ieee, hdr);
 625         }
 626
 627         /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
 628          * encrypted/authenticated */
 629         if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
 630             ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
 631                 goto rx_dropped;
 632
 633         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 634         if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep) {
 635                 if (            /*ieee->ieee802_1x && */
 636                            ieee80211_is_eapol_frame(ieee, skb)) {
 637                         /* pass unencrypted EAPOL frames even if encryption is
 638                          * configured */
 639                 } else {
 640                         IEEE80211_DEBUG_DROP("encryption configured, but RX "
 641                                              "frame not encrypted (SA=" MAC_FMT
 642                                              ")\n", MAC_ARG(hdr->addr2));
 643                         goto rx_dropped;
 644                 }
 645         }
 646
 647         if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep &&
 648             !ieee80211_is_eapol_frame(ieee, skb)) {
 649                 IEEE80211_DEBUG_DROP("dropped unencrypted RX data "
 650                                      "frame from " MAC_FMT
 651                                      " (drop_unencrypted=1)\n",
 652                                      MAC_ARG(hdr->addr2));
 653                 goto rx_dropped;
 654         }
 655
 656         /* skb: hdr + (possible reassembled) full plaintext payload */
 657
 658         payload = skb->data + hdrlen;
 659         ethertype = (payload[6] << 8) | payload[7];
 660
 661 #ifdef NOT_YET
 662         /* If IEEE 802.1X is used, check whether the port is authorized to send
 663          * the received frame. */
 664         if (ieee->ieee802_1x && ieee->iw_mode == IW_MODE_MASTER) {
 665                 if (ethertype == ETH_P_PAE) {
 666                         printk(KERN_DEBUG "%s: RX: IEEE 802.1X frame\n",
 667                                dev->name);
 668                         if (ieee->hostapd && ieee->apdev) {
 669                                 /* Send IEEE 802.1X frames to the user
 670                                  * space daemon for processing */
 671                                 prism2_rx_80211(ieee->apdev, skb, rx_stats,
 672                                                 PRISM2_RX_MGMT);
 673                                 ieee->apdevstats.rx_packets++;
 674                                 ieee->apdevstats.rx_bytes += skb->len;
 675                                 goto rx_exit;
 676                         }
 677                 } else if (!frame_authorized) {
 678                         printk(KERN_DEBUG "%s: dropped frame from "
 679                                "unauthorized port (IEEE 802.1X): "
 680                                "ethertype=0x%04x\n", dev->name, ethertype);
 681                         goto rx_dropped;
 682                 }
 683         }
 684 #endif
 685
 686         /* convert hdr + possible LLC headers into Ethernet header */
 687         if (skb->len - hdrlen >= 8 &&
 688             ((memcmp(payload, rfc1042_header, SNAP_SIZE) == 0 &&
 689               ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
 690              memcmp(payload, bridge_tunnel_header, SNAP_SIZE) == 0)) {
 691                 /* remove RFC1042 or Bridge-Tunnel encapsulation and
 692                  * replace EtherType */
 693                 skb_pull(skb, hdrlen + SNAP_SIZE);
 694                 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
 695                 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
 696         } else {
 697                 u16 len;
 698                 /* Leave Ethernet header part of hdr and full payload */
 699                 skb_pull(skb, hdrlen);
 700                 len = htons(skb->len);
 701                 memcpy(skb_push(skb, 2), &len, 2);
 702                 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
 703                 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
 704         }
 705
 706 #ifdef NOT_YET
 707         if (wds && ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 708                     IEEE80211_FCTL_TODS) && skb->len >= ETH_HLEN + ETH_ALEN) {
 709                 /* Non-standard frame: get addr4 from its bogus location after
 710                  * the payload */
 711                 memcpy(skb->data + ETH_ALEN,
 712                        skb->data + skb->len - ETH_ALEN, ETH_ALEN);
 713                 skb_trim(skb, skb->len - ETH_ALEN);
 714         }
 715 #endif
 716
 717         stats->rx_packets++;
 718         stats->rx_bytes += skb->len;
 719
 720 #ifdef NOT_YET
 721         if (ieee->iw_mode == IW_MODE_MASTER && !wds && ieee->ap->bridge_packets) {
 722                 if (dst[0] & 0x01) {
 723                         /* copy multicast frame both to the higher layers and
 724                          * to the wireless media */
 725                         ieee->ap->bridged_multicast++;
 726                         skb2 = skb_clone(skb, GFP_ATOMIC);
 727                         if (skb2 == NULL)
 728                                 printk(KERN_DEBUG "%s: skb_clone failed for "
 729                                        "multicast frame\n", dev->name);
 730                 } else if (hostap_is_sta_assoc(ieee->ap, dst)) {
 731                         /* send frame directly to the associated STA using
 732                          * wireless media and not passing to higher layers */
 733                         ieee->ap->bridged_unicast++;
 734                         skb2 = skb;
 735                         skb = NULL;
 736                 }
 737         }
 738
 739         if (skb2 != NULL) {
 740                 /* send to wireless media */
 741                 skb2->protocol = __constant_htons(ETH_P_802_3);
 742                 skb2->mac.raw = skb2->nh.raw = skb2->data;
 743                 /* skb2->nh.raw = skb2->data + ETH_HLEN; */
 744                 skb2->dev = dev;
 745                 dev_queue_xmit(skb2);
 746         }
 747 #endif
 748
 749         if (skb) {
 750                 skb->protocol = eth_type_trans(skb, dev);
 751                 memset(skb->cb, 0, sizeof(skb->cb));
 752                 skb->dev = dev;
 753                 skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
 754                 if (netif_rx(skb) == NET_RX_DROP) {
 755                         /* netif_rx always succeeds, but it might drop
 756                          * the packet.  If it drops the packet, we log that
 757                          * in our stats. */
 758                         IEEE80211_DEBUG_DROP
 759                             ("RX: netif_rx dropped the packet\n");
 760                         stats->rx_dropped++;
 761                 }
 762         }
 763
 764       rx_exit:
 765 #ifdef NOT_YET
 766         if (sta)
 767                 hostap_handle_sta_release(sta);
 768 #endif
 769         return 1;
 770
 771       rx_dropped:
 772         stats->rx_dropped++;
 773
 774         /* Returning 0 indicates to caller that we have not handled the SKB--
 775          * so it is still allocated and can be used again by underlying
 776          * hardware as a DMA target */
 777         return 0;
 778 }
 779
 780 /* Filter out unrelated packets, call ieee80211_rx[_mgt] */
 781 int ieee80211_rx_any(struct ieee80211_device *ieee,
 782                      struct sk_buff *skb, struct ieee80211_rx_stats *stats)
 783 {
 784         struct ieee80211_hdr_4addr *hdr;
 785         int is_packet_for_us;
 786         u16 fc;
 787
 788         if (ieee->iw_mode == IW_MODE_MONITOR)
 789                 return ieee80211_rx(ieee, skb, stats) ? 0 : -EINVAL;
 790
 791         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 792         fc = le16_to_cpu(hdr->frame_ctl);
 793
 794         if ((fc & IEEE80211_FCTL_VERS) != 0)
 795                 return -EINVAL;
 796
 797         switch (fc & IEEE80211_FCTL_FTYPE) {
 798         case IEEE80211_FTYPE_MGMT:
 799                 ieee80211_rx_mgt(ieee, hdr, stats);
 800                 return 0;
 801         case IEEE80211_FTYPE_DATA:
 802                 break;
 803         case IEEE80211_FTYPE_CTL:
 804                 return 0;
 805         default:
 806                 return -EINVAL;
 807         }
 808
 809         is_packet_for_us = 0;
 810         switch (ieee->iw_mode) {
 811         case IW_MODE_ADHOC:
 812                 /* our BSS and not from/to DS */
 813                 if (memcmp(hdr->addr3, ieee->bssid, ETH_ALEN) == 0)
 814                 if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == 0) {
 815                         /* promisc: get all */
 816                         if (ieee->dev->flags & IFF_PROMISC)
 817                                 is_packet_for_us = 1;
 818                         /* to us */
 819                         else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0)
 820                                 is_packet_for_us = 1;
 821                         /* mcast */
 822                         else if (is_multicast_ether_addr(hdr->addr1))
 823                                 is_packet_for_us = 1;
 824                 }
 825                 break;
 826         case IW_MODE_INFRA:
 827                 /* our BSS (== from our AP) and from DS */
 828                 if (memcmp(hdr->addr2, ieee->bssid, ETH_ALEN) == 0)
 829                 if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS) {
 830                         /* promisc: get all */
 831                         if (ieee->dev->flags & IFF_PROMISC)
 832                                 is_packet_for_us = 1;
 833                         /* to us */
 834                         else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0)
 835                                 is_packet_for_us = 1;
 836                         /* mcast */
 837                         else if (is_multicast_ether_addr(hdr->addr1)) {
 838                                 /* not our own packet bcasted from AP */
 839                                 if (memcmp(hdr->addr3, ieee->dev->dev_addr, ETH_ALEN))
 840                                         is_packet_for_us = 1;
 841                         }
 842                 }
 843                 break;
 844         default:
 845                 /* ? */
 846                 break;
 847         }
 848
 849         if (is_packet_for_us)
 850                 return (ieee80211_rx(ieee, skb, stats) ? 0 : -EINVAL);
 851         return 0;
 852 }
 853
 854 #define MGMT_FRAME_FIXED_PART_LENGTH            0x24
 855
 856 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
 857
 858 /*
 859 * Make ther structure we read from the beacon packet has
 860 * the right values
 861 */
 862 static int ieee80211_verify_qos_info(struct ieee80211_qos_information_element
 863                                      *info_element, int sub_type)
 864 {
 865
 866         if (info_element->qui_subtype != sub_type)
 867                 return -1;
 868         if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
 869                 return -1;
 870         if (info_element->qui_type != QOS_OUI_TYPE)
 871                 return -1;
 872         if (info_element->version != QOS_VERSION_1)
 873                 return -1;
 874
 875         return 0;
 876 }
 877
 878 /*
 879  * Parse a QoS parameter element
 880  */
 881 static int ieee80211_read_qos_param_element(struct ieee80211_qos_parameter_info
 882                                             *element_param, struct ieee80211_info_element
 883                                             *info_element)
 884 {
 885         int ret = 0;
 886         u16 size = sizeof(struct ieee80211_qos_parameter_info) - 2;
 887
 888         if ((info_element == NULL) || (element_param == NULL))
 889                 return -1;
 890
 891         if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
 892                 memcpy(element_param->info_element.qui, info_element->data,
 893                        info_element->len);
 894                 element_param->info_element.elementID = info_element->id;
 895                 element_param->info_element.length = info_element->len;
 896         } else
 897                 ret = -1;
 898         if (ret == 0)
 899                 ret = ieee80211_verify_qos_info(&element_param->info_element,
 900                                                 QOS_OUI_PARAM_SUB_TYPE);
 901         return ret;
 902 }
 903
 904 /*
 905  * Parse a QoS information element
 906  */
 907 static int ieee80211_read_qos_info_element(struct
 908                                            ieee80211_qos_information_element
 909                                            *element_info, struct ieee80211_info_element
 910                                            *info_element)
 911 {
 912         int ret = 0;
 913         u16 size = sizeof(struct ieee80211_qos_information_element) - 2;
 914
 915         if (element_info == NULL)
 916                 return -1;
 917         if (info_element == NULL)
 918                 return -1;
 919
 920         if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
 921                 memcpy(element_info->qui, info_element->data,
 922                        info_element->len);
 923                 element_info->elementID = info_element->id;
 924                 element_info->length = info_element->len;
 925         } else
 926                 ret = -1;
 927
 928         if (ret == 0)
 929                 ret = ieee80211_verify_qos_info(element_info,
 930                                                 QOS_OUI_INFO_SUB_TYPE);
 931         return ret;
 932 }
 933
 934 /*
 935  * Write QoS parameters from the ac parameters.
 936  */
 937 static int ieee80211_qos_convert_ac_to_parameters(struct
 938                                                   ieee80211_qos_parameter_info
 939                                                   *param_elm, struct
 940                                                   ieee80211_qos_parameters
 941                                                   *qos_param)
 942 {
 943         int rc = 0;
 944         int i;
 945         struct ieee80211_qos_ac_parameter *ac_params;
 946         u32 txop;
 947         u8 cw_min;
 948         u8 cw_max;
 949
 950         for (i = 0; i < QOS_QUEUE_NUM; i++) {
 951                 ac_params = &(param_elm->ac_params_record[i]);
 952
 953                 qos_param->aifs[i] = (ac_params->aci_aifsn) & 0x0F;
 954                 qos_param->aifs[i] -= (qos_param->aifs[i] < 2) ? 0 : 2;
 955
 956                 cw_min = ac_params->ecw_min_max & 0x0F;
 957                 qos_param->cw_min[i] = (u16) ((1 << cw_min) - 1);
 958
 959                 cw_max = (ac_params->ecw_min_max & 0xF0) >> 4;
 960                 qos_param->cw_max[i] = (u16) ((1 << cw_max) - 1);
 961
 962                 qos_param->flag[i] =
 963                     (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
 964
 965                 txop = le16_to_cpu(ac_params->tx_op_limit) * 32;
 966                 qos_param->tx_op_limit[i] = (u16) txop;
 967         }
 968         return rc;
 969 }
 970
 971 /*
 972  * we have a generic data element which it may contain QoS information or
 973  * parameters element. check the information element length to decide
 974  * which type to read
 975  */
 976 static int ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element
 977                                              *info_element,
 978                                              struct ieee80211_network *network)
 979 {
 980         int rc = 0;
 981         struct ieee80211_qos_parameters *qos_param = NULL;
 982         struct ieee80211_qos_information_element qos_info_element;
 983
 984         rc = ieee80211_read_qos_info_element(&qos_info_element, info_element);
 985
 986         if (rc == 0) {
 987                 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
 988                 network->flags |= NETWORK_HAS_QOS_INFORMATION;
 989         } else {
 990                 struct ieee80211_qos_parameter_info param_element;
 991
 992                 rc = ieee80211_read_qos_param_element(&param_element,
 993                                                       info_element);
 994                 if (rc == 0) {
 995                         qos_param = &(network->qos_data.parameters);
 996                         ieee80211_qos_convert_ac_to_parameters(&param_element,
 997                                                                qos_param);
 998                         network->flags |= NETWORK_HAS_QOS_PARAMETERS;
 999                         network->qos_data.param_count =
1000                             param_element.info_element.ac_info & 0x0F;
1001                 }
1002         }
1003
1004         if (rc == 0) {
1005                 IEEE80211_DEBUG_QOS("QoS is supported\n");
1006                 network->qos_data.supported = 1;
1007         }
1008         return rc;
1009 }
1010
1011 #ifdef CONFIG_IEEE80211_DEBUG
1012 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
1013
1014 static const char *get_info_element_string(u16 id)
1015 {
1016         switch (id) {
1017                 MFIE_STRING(SSID);
1018                 MFIE_STRING(RATES);
1019                 MFIE_STRING(FH_SET);
1020                 MFIE_STRING(DS_SET);
1021                 MFIE_STRING(CF_SET);
1022                 MFIE_STRING(TIM);
1023                 MFIE_STRING(IBSS_SET);
1024                 MFIE_STRING(COUNTRY);
1025                 MFIE_STRING(HOP_PARAMS);
1026                 MFIE_STRING(HOP_TABLE);
1027                 MFIE_STRING(REQUEST);
1028                 MFIE_STRING(CHALLENGE);
1029                 MFIE_STRING(POWER_CONSTRAINT);
1030                 MFIE_STRING(POWER_CAPABILITY);
1031                 MFIE_STRING(TPC_REQUEST);
1032                 MFIE_STRING(TPC_REPORT);
1033                 MFIE_STRING(SUPP_CHANNELS);
1034                 MFIE_STRING(CSA);
1035                 MFIE_STRING(MEASURE_REQUEST);
1036                 MFIE_STRING(MEASURE_REPORT);
1037                 MFIE_STRING(QUIET);
1038                 MFIE_STRING(IBSS_DFS);
1039                 MFIE_STRING(ERP_INFO);
1040                 MFIE_STRING(RSN);
1041                 MFIE_STRING(RATES_EX);
1042                 MFIE_STRING(GENERIC);
1043                 MFIE_STRING(QOS_PARAMETER);
1044         default:
1045                 return "UNKNOWN";
1046         }
1047 }
1048 #endif
1049
1050 static int ieee80211_parse_info_param(struct ieee80211_info_element
1051                                       *info_element, u16 length,
1052                                       struct ieee80211_network *network)
1053 {
1054         u8 i;
1055 #ifdef CONFIG_IEEE80211_DEBUG
1056         char rates_str[64];
1057         char *p;
1058 #endif
1059
1060         while (length >= sizeof(*info_element)) {
1061                 if (sizeof(*info_element) + info_element->len > length) {
1062                         IEEE80211_DEBUG_MGMT("Info elem: parse failed: "
1063                                              "info_element->len + 2 > left : "
1064                                              "info_element->len+2=%zd left=%d, id=%d.\n",
1065                                              info_element->len +
1066                                              sizeof(*info_element),
1067                                              length, info_element->id);
1068                         return 1;
1069                 }
1070
1071                 switch (info_element->id) {
1072                 case MFIE_TYPE_SSID:
1073                         if (ieee80211_is_empty_essid(info_element->data,
1074                                                      info_element->len)) {
1075                                 network->flags |= NETWORK_EMPTY_ESSID;
1076                                 break;
1077                         }
1078
1079                         network->ssid_len = min(info_element->len,
1080                                                 (u8) IW_ESSID_MAX_SIZE);
1081                         memcpy(network->ssid, info_element->data,
1082                                network->ssid_len);
1083                         if (network->ssid_len < IW_ESSID_MAX_SIZE)
1084                                 memset(network->ssid + network->ssid_len, 0,
1085                                        IW_ESSID_MAX_SIZE - network->ssid_len);
1086
1087                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
1088                                              network->ssid, network->ssid_len);
1089                         break;
1090
1091                 case MFIE_TYPE_RATES:
1092 #ifdef CONFIG_IEEE80211_DEBUG
1093                         p = rates_str;
1094 #endif
1095                         network->rates_len = min(info_element->len,
1096                                                  MAX_RATES_LENGTH);
1097                         for (i = 0; i < network->rates_len; i++) {
1098                                 network->rates[i] = info_element->data[i];
1099 #ifdef CONFIG_IEEE80211_DEBUG
1100                                 p += snprintf(p, sizeof(rates_str) -
1101                                               (p - rates_str), "%02X ",
1102                                               network->rates[i]);
1103 #endif
1104                                 if (ieee80211_is_ofdm_rate
1105                                     (info_element->data[i])) {
1106                                         network->flags |= NETWORK_HAS_OFDM;
1107                                         if (info_element->data[i] &
1108                                             IEEE80211_BASIC_RATE_MASK)
1109                                                 network->flags &=
1110                                                     ~NETWORK_HAS_CCK;
1111                                 }
1112                         }
1113
1114                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
1115                                              rates_str, network->rates_len);
1116                         break;
1117
1118                 case MFIE_TYPE_RATES_EX:
1119 #ifdef CONFIG_IEEE80211_DEBUG
1120                         p = rates_str;
1121 #endif
1122                         network->rates_ex_len = min(info_element->len,
1123                                                     MAX_RATES_EX_LENGTH);
1124                         for (i = 0; i < network->rates_ex_len; i++) {
1125                                 network->rates_ex[i] = info_element->data[i];
1126 #ifdef CONFIG_IEEE80211_DEBUG
1127                                 p += snprintf(p, sizeof(rates_str) -
1128                                               (p - rates_str), "%02X ",
1129                                               network->rates[i]);
1130 #endif
1131                                 if (ieee80211_is_ofdm_rate
1132                                     (info_element->data[i])) {
1133                                         network->flags |= NETWORK_HAS_OFDM;
1134                                         if (info_element->data[i] &
1135                                             IEEE80211_BASIC_RATE_MASK)
1136                                                 network->flags &=
1137                                                     ~NETWORK_HAS_CCK;
1138                                 }
1139                         }
1140
1141                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1142                                              rates_str, network->rates_ex_len);
1143                         break;
1144
1145                 case MFIE_TYPE_DS_SET:
1146                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
1147                                              info_element->data[0]);
1148                         network->channel = info_element->data[0];
1149                         break;
1150
1151                 case MFIE_TYPE_FH_SET:
1152                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
1153                         break;
1154
1155                 case MFIE_TYPE_CF_SET:
1156                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
1157                         break;
1158
1159                 case MFIE_TYPE_TIM:
1160                         network->tim.tim_count = info_element->data[0];
1161                         network->tim.tim_period = info_element->data[1];
1162                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_TIM: partially ignored\n");
1163                         break;
1164
1165                 case MFIE_TYPE_ERP_INFO:
1166                         network->erp_value = info_element->data[0];
1167                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1168                                              network->erp_value);
1169                         break;
1170
1171                 case MFIE_TYPE_IBSS_SET:
1172                         network->atim_window = info_element->data[0];
1173                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
1174                                              network->atim_window);
1175                         break;
1176
1177                 case MFIE_TYPE_CHALLENGE:
1178                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
1179                         break;
1180
1181                 case MFIE_TYPE_GENERIC:
1182                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
1183                                              info_element->len);
1184                         if (!ieee80211_parse_qos_info_param_IE(info_element,
1185                                                                network))
1186                                 break;
1187
1188                         if (info_element->len >= 4 &&
1189                             info_element->data[0] == 0x00 &&
1190                             info_element->data[1] == 0x50 &&
1191                             info_element->data[2] == 0xf2 &&
1192                             info_element->data[3] == 0x01) {
1193                                 network->wpa_ie_len = min(info_element->len + 2,
1194                                                           MAX_WPA_IE_LEN);
1195                                 memcpy(network->wpa_ie, info_element,
1196                                        network->wpa_ie_len);
1197                         }
1198                         break;
1199
1200                 case MFIE_TYPE_RSN:
1201                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
1202                                              info_element->len);
1203                         network->rsn_ie_len = min(info_element->len + 2,
1204                                                   MAX_WPA_IE_LEN);
1205                         memcpy(network->rsn_ie, info_element,
1206                                network->rsn_ie_len);
1207                         break;
1208
1209                 case MFIE_TYPE_QOS_PARAMETER:
1210                         printk(KERN_ERR
1211                                "QoS Error need to parse QOS_PARAMETER IE\n");
1212                         break;
1213                         /* 802.11h */
1214                 case MFIE_TYPE_POWER_CONSTRAINT:
1215                         network->power_constraint = info_element->data[0];
1216                         network->flags |= NETWORK_HAS_POWER_CONSTRAINT;
1217                         break;
1218
1219                 case MFIE_TYPE_CSA:
1220                         network->power_constraint = info_element->data[0];
1221                         network->flags |= NETWORK_HAS_CSA;
1222                         break;
1223
1224                 case MFIE_TYPE_QUIET:
1225                         network->quiet.count = info_element->data[0];
1226                         network->quiet.period = info_element->data[1];
1227                         network->quiet.duration = info_element->data[2];
1228                         network->quiet.offset = info_element->data[3];
1229                         network->flags |= NETWORK_HAS_QUIET;
1230                         break;
1231
1232                 case MFIE_TYPE_IBSS_DFS:
1233                         if (network->ibss_dfs)
1234                                 break;
1235                         network->ibss_dfs =
1236                             kmalloc(info_element->len, GFP_ATOMIC);
1237                         if (!network->ibss_dfs)
1238                                 return 1;
1239                         memcpy(network->ibss_dfs, info_element->data,
1240                                info_element->len);
1241                         network->flags |= NETWORK_HAS_IBSS_DFS;
1242                         break;
1243
1244                 case MFIE_TYPE_TPC_REPORT:
1245                         network->tpc_report.transmit_power =
1246                             info_element->data[0];
1247                         network->tpc_report.link_margin = info_element->data[1];
1248                         network->flags |= NETWORK_HAS_TPC_REPORT;
1249                         break;
1250
1251                 default:
1252                         IEEE80211_DEBUG_MGMT
1253                             ("Unsupported info element: %s (%d)\n",
1254                              get_info_element_string(info_element->id),
1255                              info_element->id);
1256                         break;
1257                 }
1258
1259                 length -= sizeof(*info_element) + info_element->len;
1260                 info_element =
1261                     (struct ieee80211_info_element *)&info_element->
1262                     data[info_element->len];
1263         }
1264
1265         return 0;
1266 }
1267
1268 static int ieee80211_handle_assoc_resp(struct ieee80211_device *ieee, struct ieee80211_assoc_response
1269                                        *frame, struct ieee80211_rx_stats *stats)
1270 {
1271         struct ieee80211_network network_resp = {
1272                 .ibss_dfs = NULL,
1273         };
1274         struct ieee80211_network *network = &network_resp;
1275         struct net_device *dev = ieee->dev;
1276
1277         network->flags = 0;
1278         network->qos_data.active = 0;
1279         network->qos_data.supported = 0;
1280         network->qos_data.param_count = 0;
1281         network->qos_data.old_param_count = 0;
1282
1283         //network->atim_window = le16_to_cpu(frame->aid) & (0x3FFF);
1284         network->atim_window = le16_to_cpu(frame->aid);
1285         network->listen_interval = le16_to_cpu(frame->status);
1286         memcpy(network->bssid, frame->header.addr3, ETH_ALEN);
1287         network->capability = le16_to_cpu(frame->capability);
1288         network->last_scanned = jiffies;
1289         network->rates_len = network->rates_ex_len = 0;
1290         network->last_associate = 0;
1291         network->ssid_len = 0;
1292         network->erp_value =
1293             (network->capability & WLAN_CAPABILITY_IBSS) ? 0x3 : 0x0;
1294
1295         if (stats->freq == IEEE80211_52GHZ_BAND) {
1296                 /* for A band (No DS info) */
1297                 network->channel = stats->received_channel;
1298         } else
1299                 network->flags |= NETWORK_HAS_CCK;
1300
1301         network->wpa_ie_len = 0;
1302         network->rsn_ie_len = 0;
1303
1304         if (ieee80211_parse_info_param
1305             (frame->info_element, stats->len - sizeof(*frame), network))
1306                 return 1;
1307
1308         network->mode = 0;
1309         if (stats->freq == IEEE80211_52GHZ_BAND)
1310                 network->mode = IEEE_A;
1311         else {
1312                 if (network->flags & NETWORK_HAS_OFDM)
1313                         network->mode |= IEEE_G;
1314                 if (network->flags & NETWORK_HAS_CCK)
1315                         network->mode |= IEEE_B;
1316         }
1317
1318         if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
1319                 network->flags |= NETWORK_EMPTY_ESSID;
1320
1321         memcpy(&network->stats, stats, sizeof(network->stats));
1322
1323         if (ieee->handle_assoc_response != NULL)
1324                 ieee->handle_assoc_response(dev, frame, network);
1325
1326         return 0;
1327 }
1328
1329 /***************************************************/
1330
1331 static int ieee80211_network_init(struct ieee80211_device *ieee, struct ieee80211_probe_response
1332                                          *beacon,
1333                                          struct ieee80211_network *network,
1334                                          struct ieee80211_rx_stats *stats)
1335 {
1336         network->qos_data.active = 0;
1337         network->qos_data.supported = 0;
1338         network->qos_data.param_count = 0;
1339         network->qos_data.old_param_count = 0;
1340
1341         /* Pull out fixed field data */
1342         memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
1343         network->capability = le16_to_cpu(beacon->capability);
1344         network->last_scanned = jiffies;
1345         network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
1346         network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
1347         network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
1348         /* Where to pull this? beacon->listen_interval; */
1349         network->listen_interval = 0x0A;
1350         network->rates_len = network->rates_ex_len = 0;
1351         network->last_associate = 0;
1352         network->ssid_len = 0;
1353         network->flags = 0;
1354         network->atim_window = 0;
1355         network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
1356             0x3 : 0x0;
1357
1358         if (stats->freq == IEEE80211_52GHZ_BAND) {
1359                 /* for A band (No DS info) */
1360                 network->channel = stats->received_channel;
1361         } else
1362                 network->flags |= NETWORK_HAS_CCK;
1363
1364         network->wpa_ie_len = 0;
1365         network->rsn_ie_len = 0;
1366
1367         if (ieee80211_parse_info_param
1368             (beacon->info_element, stats->len - sizeof(*beacon), network))
1369                 return 1;
1370
1371         network->mode = 0;
1372         if (stats->freq == IEEE80211_52GHZ_BAND)
1373                 network->mode = IEEE_A;
1374         else {
1375                 if (network->flags & NETWORK_HAS_OFDM)
1376                         network->mode |= IEEE_G;
1377                 if (network->flags & NETWORK_HAS_CCK)
1378                         network->mode |= IEEE_B;
1379         }
1380
1381         if (network->mode == 0) {
1382                 IEEE80211_DEBUG_SCAN("Filtered out '%s (" MAC_FMT ")' "
1383                                      "network.\n",
1384                                      escape_essid(network->ssid,
1385                                                   network->ssid_len),
1386                                      MAC_ARG(network->bssid));
1387                 return 1;
1388         }
1389
1390         if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
1391                 network->flags |= NETWORK_EMPTY_ESSID;
1392
1393         memcpy(&network->stats, stats, sizeof(network->stats));
1394
1395         return 0;
1396 }
1397
1398 static inline int is_same_network(struct ieee80211_network *src,
1399                                   struct ieee80211_network *dst)
1400 {
1401         /* A network is only a duplicate if the channel, BSSID, and ESSID
1402          * all match.  We treat all <hidden> with the same BSSID and channel
1403          * as one network */
1404         return ((src->ssid_len == dst->ssid_len) &&
1405                 (src->channel == dst->channel) &&
1406                 !compare_ether_addr(src->bssid, dst->bssid) &&
1407                 !memcmp(src->ssid, dst->ssid, src->ssid_len));
1408 }
1409
1410 static void update_network(struct ieee80211_network *dst,
1411                                   struct ieee80211_network *src)
1412 {
1413         int qos_active;
1414         u8 old_param;
1415
1416         ieee80211_network_reset(dst);
1417         dst->ibss_dfs = src->ibss_dfs;
1418
1419         /* We only update the statistics if they were created by receiving
1420          * the network information on the actual channel the network is on.
1421          *
1422          * This keeps beacons received on neighbor channels from bringing
1423          * down the signal level of an AP. */
1424         if (dst->channel == src->stats.received_channel)
1425                 memcpy(&dst->stats, &src->stats,
1426                        sizeof(struct ieee80211_rx_stats));
1427         else
1428                 IEEE80211_DEBUG_SCAN("Network " MAC_FMT " info received "
1429                         "off channel (%d vs. %d)\n", MAC_ARG(src->bssid),
1430                         dst->channel, src->stats.received_channel);
1431
1432         dst->capability = src->capability;
1433         memcpy(dst->rates, src->rates, src->rates_len);
1434         dst->rates_len = src->rates_len;
1435         memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
1436         dst->rates_ex_len = src->rates_ex_len;
1437
1438         dst->mode = src->mode;
1439         dst->flags = src->flags;
1440         dst->time_stamp[0] = src->time_stamp[0];
1441         dst->time_stamp[1] = src->time_stamp[1];
1442
1443         dst->beacon_interval = src->beacon_interval;
1444         dst->listen_interval = src->listen_interval;
1445         dst->atim_window = src->atim_window;
1446         dst->erp_value = src->erp_value;
1447         dst->tim = src->tim;
1448
1449         memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
1450         dst->wpa_ie_len = src->wpa_ie_len;
1451         memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
1452         dst->rsn_ie_len = src->rsn_ie_len;
1453
1454         dst->last_scanned = jiffies;
1455         qos_active = src->qos_data.active;
1456         old_param = dst->qos_data.old_param_count;
1457         if (dst->flags & NETWORK_HAS_QOS_MASK)
1458                 memcpy(&dst->qos_data, &src->qos_data,
1459                        sizeof(struct ieee80211_qos_data));
1460         else {
1461                 dst->qos_data.supported = src->qos_data.supported;
1462                 dst->qos_data.param_count = src->qos_data.param_count;
1463         }
1464
1465         if (dst->qos_data.supported == 1) {
1466                 if (dst->ssid_len)
1467                         IEEE80211_DEBUG_QOS
1468                             ("QoS the network %s is QoS supported\n",
1469                              dst->ssid);
1470                 else
1471                         IEEE80211_DEBUG_QOS
1472                             ("QoS the network is QoS supported\n");
1473         }
1474         dst->qos_data.active = qos_active;
1475         dst->qos_data.old_param_count = old_param;
1476
1477         /* dst->last_associate is not overwritten */
1478 }
1479
1480 static inline int is_beacon(__le16 fc)
1481 {
1482         return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON);
1483 }
1484
1485 static void ieee80211_process_probe_response(struct ieee80211_device
1486                                                     *ieee, struct
1487                                                     ieee80211_probe_response
1488                                                     *beacon, struct ieee80211_rx_stats
1489                                                     *stats)
1490 {
1491         struct net_device *dev = ieee->dev;
1492         struct ieee80211_network network = {
1493                 .ibss_dfs = NULL,
1494         };
1495         struct ieee80211_network *target;
1496         struct ieee80211_network *oldest = NULL;
1497 #ifdef CONFIG_IEEE80211_DEBUG
1498         struct ieee80211_info_element *info_element = beacon->info_element;
1499 #endif
1500         unsigned long flags;
1501
1502         IEEE80211_DEBUG_SCAN("'%s' (" MAC_FMT
1503                              "): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
1504                              escape_essid(info_element->data,
1505                                           info_element->len),
1506                              MAC_ARG(beacon->header.addr3),
1507                              (beacon->capability & (1 << 0xf)) ? '1' : '0',
1508                              (beacon->capability & (1 << 0xe)) ? '1' : '0',
1509                              (beacon->capability & (1 << 0xd)) ? '1' : '0',
1510                              (beacon->capability & (1 << 0xc)) ? '1' : '0',
1511                              (beacon->capability & (1 << 0xb)) ? '1' : '0',
1512                              (beacon->capability & (1 << 0xa)) ? '1' : '0',
1513                              (beacon->capability & (1 << 0x9)) ? '1' : '0',
1514                              (beacon->capability & (1 << 0x8)) ? '1' : '0',
1515                              (beacon->capability & (1 << 0x7)) ? '1' : '0',
1516                              (beacon->capability & (1 << 0x6)) ? '1' : '0',
1517                              (beacon->capability & (1 << 0x5)) ? '1' : '0',
1518                              (beacon->capability & (1 << 0x4)) ? '1' : '0',
1519                              (beacon->capability & (1 << 0x3)) ? '1' : '0',
1520                              (beacon->capability & (1 << 0x2)) ? '1' : '0',
1521                              (beacon->capability & (1 << 0x1)) ? '1' : '0',
1522                              (beacon->capability & (1 << 0x0)) ? '1' : '0');
1523
1524         if (ieee80211_network_init(ieee, beacon, &network, stats)) {
1525                 IEEE80211_DEBUG_SCAN("Dropped '%s' (" MAC_FMT ") via %s.\n",
1526                                      escape_essid(info_element->data,
1527                                                   info_element->len),
1528                                      MAC_ARG(beacon->header.addr3),
1529                                      is_beacon(beacon->header.frame_ctl) ?
1530                                      "BEACON" : "PROBE RESPONSE");
1531                 return;
1532         }
1533
1534         /* The network parsed correctly -- so now we scan our known networks
1535          * to see if we can find it in our list.
1536          *
1537          * NOTE:  This search is definitely not optimized.  Once its doing
1538          *        the "right thing" we'll optimize it for efficiency if
1539          *        necessary */
1540
1541         /* Search for this entry in the list and update it if it is
1542          * already there. */
1543
1544         spin_lock_irqsave(&ieee->lock, flags);
1545
1546         list_for_each_entry(target, &ieee->network_list, list) {
1547                 if (is_same_network(target, &network))
1548                         break;
1549
1550                 if ((oldest == NULL) ||
1551                     (target->last_scanned < oldest->last_scanned))
1552                         oldest = target;
1553         }
1554
1555         /* If we didn't find a match, then get a new network slot to initialize
1556          * with this beacon's information */
1557         if (&target->list == &ieee->network_list) {
1558                 if (list_empty(&ieee->network_free_list)) {
1559                         /* If there are no more slots, expire the oldest */
1560                         list_del(&oldest->list);
1561                         target = oldest;
1562                         IEEE80211_DEBUG_SCAN("Expired '%s' (" MAC_FMT ") from "
1563                                              "network list.\n",
1564                                              escape_essid(target->ssid,
1565                                                           target->ssid_len),
1566                                              MAC_ARG(target->bssid));
1567                         ieee80211_network_reset(target);
1568                 } else {
1569                         /* Otherwise just pull from the free list */
1570                         target = list_entry(ieee->network_free_list.next,
1571                                             struct ieee80211_network, list);
1572                         list_del(ieee->network_free_list.next);
1573                 }
1574
1575 #ifdef CONFIG_IEEE80211_DEBUG
1576                 IEEE80211_DEBUG_SCAN("Adding '%s' (" MAC_FMT ") via %s.\n",
1577                                      escape_essid(network.ssid,
1578                                                   network.ssid_len),
1579                                      MAC_ARG(network.bssid),
1580                                      is_beacon(beacon->header.frame_ctl) ?
1581                                      "BEACON" : "PROBE RESPONSE");
1582 #endif
1583                 memcpy(target, &network, sizeof(*target));
1584                 network.ibss_dfs = NULL;
1585                 list_add_tail(&target->list, &ieee->network_list);
1586         } else {
1587                 IEEE80211_DEBUG_SCAN("Updating '%s' (" MAC_FMT ") via %s.\n",
1588                                      escape_essid(target->ssid,
1589                                                   target->ssid_len),
1590                                      MAC_ARG(target->bssid),
1591                                      is_beacon(beacon->header.frame_ctl) ?
1592                                      "BEACON" : "PROBE RESPONSE");
1593                 update_network(target, &network);
1594                 network.ibss_dfs = NULL;
1595         }
1596
1597         spin_unlock_irqrestore(&ieee->lock, flags);
1598
1599         if (is_beacon(beacon->header.frame_ctl)) {
1600                 if (ieee->handle_beacon != NULL)
1601                         ieee->handle_beacon(dev, beacon, target);
1602         } else {
1603                 if (ieee->handle_probe_response != NULL)
1604                         ieee->handle_probe_response(dev, beacon, target);
1605         }
1606 }
1607
1608 void ieee80211_rx_mgt(struct ieee80211_device *ieee,
1609                       struct ieee80211_hdr_4addr *header,
1610                       struct ieee80211_rx_stats *stats)
1611 {
1612         switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
1613         case IEEE80211_STYPE_ASSOC_RESP:
1614                 IEEE80211_DEBUG_MGMT("received ASSOCIATION RESPONSE (%d)\n",
1615                                      WLAN_FC_GET_STYPE(le16_to_cpu
1616                                                        (header->frame_ctl)));
1617                 ieee80211_handle_assoc_resp(ieee,
1618                                             (struct ieee80211_assoc_response *)
1619                                             header, stats);
1620                 break;
1621
1622         case IEEE80211_STYPE_REASSOC_RESP:
1623                 IEEE80211_DEBUG_MGMT("received REASSOCIATION RESPONSE (%d)\n",
1624                                      WLAN_FC_GET_STYPE(le16_to_cpu
1625                                                        (header->frame_ctl)));
1626                 break;
1627
1628         case IEEE80211_STYPE_PROBE_REQ:
1629                 IEEE80211_DEBUG_MGMT("received auth (%d)\n",
1630                                      WLAN_FC_GET_STYPE(le16_to_cpu
1631                                                        (header->frame_ctl)));
1632
1633                 if (ieee->handle_probe_request != NULL)
1634                         ieee->handle_probe_request(ieee->dev,
1635                                                    (struct
1636                                                     ieee80211_probe_request *)
1637                                                    header, stats);
1638                 break;
1639
1640         case IEEE80211_STYPE_PROBE_RESP:
1641                 IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
1642                                      WLAN_FC_GET_STYPE(le16_to_cpu
1643                                                        (header->frame_ctl)));
1644                 IEEE80211_DEBUG_SCAN("Probe response\n");
1645                 ieee80211_process_probe_response(ieee,
1646                                                  (struct
1647                                                   ieee80211_probe_response *)
1648                                                  header, stats);
1649                 break;
1650
1651         case IEEE80211_STYPE_BEACON:
1652                 IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
1653                                      WLAN_FC_GET_STYPE(le16_to_cpu
1654                                                        (header->frame_ctl)));
1655                 IEEE80211_DEBUG_SCAN("Beacon\n");
1656                 ieee80211_process_probe_response(ieee,
1657                                                  (struct
1658                                                   ieee80211_probe_response *)
1659                                                  header, stats);
1660                 break;
1661         case IEEE80211_STYPE_AUTH:
1662
1663                 IEEE80211_DEBUG_MGMT("received auth (%d)\n",
1664                                      WLAN_FC_GET_STYPE(le16_to_cpu
1665                                                        (header->frame_ctl)));
1666
1667                 if (ieee->handle_auth != NULL)
1668                         ieee->handle_auth(ieee->dev,
1669                                           (struct ieee80211_auth *)header);
1670                 break;
1671
1672         case IEEE80211_STYPE_DISASSOC:
1673                 if (ieee->handle_disassoc != NULL)
1674                         ieee->handle_disassoc(ieee->dev,
1675                                               (struct ieee80211_disassoc *)
1676                                               header);
1677                 break;
1678
1679         case IEEE80211_STYPE_ACTION:
1680                 IEEE80211_DEBUG_MGMT("ACTION\n");
1681                 if (ieee->handle_action)
1682                         ieee->handle_action(ieee->dev,
1683                                             (struct ieee80211_action *)
1684                                             header, stats);
1685                 break;
1686
1687         case IEEE80211_STYPE_REASSOC_REQ:
1688                 IEEE80211_DEBUG_MGMT("received reassoc (%d)\n",
1689                                      WLAN_FC_GET_STYPE(le16_to_cpu
1690                                                        (header->frame_ctl)));
1691
1692                 IEEE80211_DEBUG_MGMT("%s: IEEE80211_REASSOC_REQ received\n",
1693                                      ieee->dev->name);
1694                 if (ieee->handle_reassoc_request != NULL)
1695                         ieee->handle_reassoc_request(ieee->dev,
1696                                                     (struct ieee80211_reassoc_request *)
1697                                                      header);
1698                 break;
1699
1700         case IEEE80211_STYPE_ASSOC_REQ:
1701                 IEEE80211_DEBUG_MGMT("received assoc (%d)\n",
1702                                      WLAN_FC_GET_STYPE(le16_to_cpu
1703                                                        (header->frame_ctl)));
1704
1705                 IEEE80211_DEBUG_MGMT("%s: IEEE80211_ASSOC_REQ received\n",
1706                                      ieee->dev->name);
1707                 if (ieee->handle_assoc_request != NULL)
1708                         ieee->handle_assoc_request(ieee->dev);
1709                 break;
1710
1711         case IEEE80211_STYPE_DEAUTH:
1712                 IEEE80211_DEBUG_MGMT("DEAUTH\n");
1713                 if (ieee->handle_deauth != NULL)
1714                         ieee->handle_deauth(ieee->dev,
1715                                             (struct ieee80211_deauth *)
1716                                             header);
1717                 break;
1718         default:
1719                 IEEE80211_DEBUG_MGMT("received UNKNOWN (%d)\n",
1720                                      WLAN_FC_GET_STYPE(le16_to_cpu
1721                                                        (header->frame_ctl)));
1722                 IEEE80211_DEBUG_MGMT("%s: Unknown management packet: %d\n",
1723                                      ieee->dev->name,
1724                                      WLAN_FC_GET_STYPE(le16_to_cpu
1725                                                        (header->frame_ctl)));
1726                 break;
1727         }
1728 }
1729
1730 EXPORT_SYMBOL(ieee80211_rx_mgt);
1731 EXPORT_SYMBOL(ieee80211_rx);