git.oblomov.eu Git - linux-2.6/blob - 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_reset_mac_header(skb);
  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 CONFIG_WIRELESS_EXT
 372 #ifdef IW_WIRELESS_SPY          /* defined in iw_handler.h */
 373         /* If spy monitoring on */
 374         if (ieee->spy_data.spy_number > 0) {
 375                 struct iw_quality wstats;
 376
 377                 wstats.updated = 0;
 378                 if (rx_stats->mask & IEEE80211_STATMASK_RSSI) {
 379                         wstats.level = rx_stats->rssi;
 380                         wstats.updated |= IW_QUAL_LEVEL_UPDATED;
 381                 } else
 382                         wstats.updated |= IW_QUAL_LEVEL_INVALID;
 383
 384                 if (rx_stats->mask & IEEE80211_STATMASK_NOISE) {
 385                         wstats.noise = rx_stats->noise;
 386                         wstats.updated |= IW_QUAL_NOISE_UPDATED;
 387                 } else
 388                         wstats.updated |= IW_QUAL_NOISE_INVALID;
 389
 390                 if (rx_stats->mask & IEEE80211_STATMASK_SIGNAL) {
 391                         wstats.qual = rx_stats->signal;
 392                         wstats.updated |= IW_QUAL_QUAL_UPDATED;
 393                 } else
 394                         wstats.updated |= IW_QUAL_QUAL_INVALID;
 395
 396                 /* Update spy records */
 397                 wireless_spy_update(ieee->dev, hdr->addr2, &wstats);
 398         }
 399 #endif                          /* IW_WIRELESS_SPY */
 400 #endif                          /* CONFIG_WIRELESS_EXT */
 401
 402 #ifdef NOT_YET
 403         hostap_update_rx_stats(local->ap, hdr, rx_stats);
 404 #endif
 405
 406         if (ieee->iw_mode == IW_MODE_MONITOR) {
 407                 stats->rx_packets++;
 408                 stats->rx_bytes += skb->len;
 409                 ieee80211_monitor_rx(ieee, skb, rx_stats);
 410                 return 1;
 411         }
 412
 413         can_be_decrypted = (is_multicast_ether_addr(hdr->addr1) ||
 414                             is_broadcast_ether_addr(hdr->addr2)) ?
 415             ieee->host_mc_decrypt : ieee->host_decrypt;
 416
 417         if (can_be_decrypted) {
 418                 if (skb->len >= hdrlen + 3) {
 419                         /* Top two-bits of byte 3 are the key index */
 420                         keyidx = skb->data[hdrlen + 3] >> 6;
 421                 }
 422
 423                 /* ieee->crypt[] is WEP_KEY (4) in length.  Given that keyidx
 424                  * is only allowed 2-bits of storage, no value of keyidx can
 425                  * be provided via above code that would result in keyidx
 426                  * being out of range */
 427                 crypt = ieee->crypt[keyidx];
 428
 429 #ifdef NOT_YET
 430                 sta = NULL;
 431
 432                 /* Use station specific key to override default keys if the
 433                  * receiver address is a unicast address ("individual RA"). If
 434                  * bcrx_sta_key parameter is set, station specific key is used
 435                  * even with broad/multicast targets (this is against IEEE
 436                  * 802.11, but makes it easier to use different keys with
 437                  * stations that do not support WEP key mapping). */
 438
 439                 if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key)
 440                         (void)hostap_handle_sta_crypto(local, hdr, &crypt,
 441                                                        &sta);
 442 #endif
 443
 444                 /* allow NULL decrypt to indicate an station specific override
 445                  * for default encryption */
 446                 if (crypt && (crypt->ops == NULL ||
 447                               crypt->ops->decrypt_mpdu == NULL))
 448                         crypt = NULL;
 449
 450                 if (!crypt && (fc & IEEE80211_FCTL_PROTECTED)) {
 451                         /* This seems to be triggered by some (multicast?)
 452                          * frames from other than current BSS, so just drop the
 453                          * frames silently instead of filling system log with
 454                          * these reports. */
 455                         IEEE80211_DEBUG_DROP("Decryption failed (not set)"
 456                                              " (SA=" MAC_FMT ")\n",
 457                                              MAC_ARG(hdr->addr2));
 458                         ieee->ieee_stats.rx_discards_undecryptable++;
 459                         goto rx_dropped;
 460                 }
 461         }
 462 #ifdef NOT_YET
 463         if (type != WLAN_FC_TYPE_DATA) {
 464                 if (type == WLAN_FC_TYPE_MGMT && stype == WLAN_FC_STYPE_AUTH &&
 465                     fc & IEEE80211_FCTL_PROTECTED && ieee->host_decrypt &&
 466                     (keyidx = hostap_rx_frame_decrypt(ieee, skb, crypt)) < 0) {
 467                         printk(KERN_DEBUG "%s: failed to decrypt mgmt::auth "
 468                                "from " MAC_FMT "\n", dev->name,
 469                                MAC_ARG(hdr->addr2));
 470                         /* TODO: could inform hostapd about this so that it
 471                          * could send auth failure report */
 472                         goto rx_dropped;
 473                 }
 474
 475                 if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
 476                         goto rx_dropped;
 477                 else
 478                         goto rx_exit;
 479         }
 480 #endif
 481         /* drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.29) */
 482         if (sc == ieee->prev_seq_ctl)
 483                 goto rx_dropped;
 484         else
 485                 ieee->prev_seq_ctl = sc;
 486
 487         /* Data frame - extract src/dst addresses */
 488         if (skb->len < IEEE80211_3ADDR_LEN)
 489                 goto rx_dropped;
 490
 491         switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
 492         case IEEE80211_FCTL_FROMDS:
 493                 memcpy(dst, hdr->addr1, ETH_ALEN);
 494                 memcpy(src, hdr->addr3, ETH_ALEN);
 495                 break;
 496         case IEEE80211_FCTL_TODS:
 497                 memcpy(dst, hdr->addr3, ETH_ALEN);
 498                 memcpy(src, hdr->addr2, ETH_ALEN);
 499                 break;
 500         case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
 501                 if (skb->len < IEEE80211_4ADDR_LEN)
 502                         goto rx_dropped;
 503                 memcpy(dst, hdr->addr3, ETH_ALEN);
 504                 memcpy(src, hdr->addr4, ETH_ALEN);
 505                 break;
 506         case 0:
 507                 memcpy(dst, hdr->addr1, ETH_ALEN);
 508                 memcpy(src, hdr->addr2, ETH_ALEN);
 509                 break;
 510         }
 511
 512 #ifdef NOT_YET
 513         if (hostap_rx_frame_wds(ieee, hdr, fc, &wds))
 514                 goto rx_dropped;
 515         if (wds) {
 516                 skb->dev = dev = wds;
 517                 stats = hostap_get_stats(dev);
 518         }
 519
 520         if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
 521             (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 522             IEEE80211_FCTL_FROMDS && ieee->stadev
 523             && !compare_ether_addr(hdr->addr2, ieee->assoc_ap_addr)) {
 524                 /* Frame from BSSID of the AP for which we are a client */
 525                 skb->dev = dev = ieee->stadev;
 526                 stats = hostap_get_stats(dev);
 527                 from_assoc_ap = 1;
 528         }
 529 #endif
 530
 531         dev->last_rx = jiffies;
 532
 533 #ifdef NOT_YET
 534         if ((ieee->iw_mode == IW_MODE_MASTER ||
 535              ieee->iw_mode == IW_MODE_REPEAT) && !from_assoc_ap) {
 536                 switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats,
 537                                              wds != NULL)) {
 538                 case AP_RX_CONTINUE_NOT_AUTHORIZED:
 539                         frame_authorized = 0;
 540                         break;
 541                 case AP_RX_CONTINUE:
 542                         frame_authorized = 1;
 543                         break;
 544                 case AP_RX_DROP:
 545                         goto rx_dropped;
 546                 case AP_RX_EXIT:
 547                         goto rx_exit;
 548                 }
 549         }
 550 #endif
 551
 552         /* Nullfunc frames may have PS-bit set, so they must be passed to
 553          * hostap_handle_sta_rx() before being dropped here. */
 554
 555         stype &= ~IEEE80211_STYPE_QOS_DATA;
 556
 557         if (stype != IEEE80211_STYPE_DATA &&
 558             stype != IEEE80211_STYPE_DATA_CFACK &&
 559             stype != IEEE80211_STYPE_DATA_CFPOLL &&
 560             stype != IEEE80211_STYPE_DATA_CFACKPOLL) {
 561                 if (stype != IEEE80211_STYPE_NULLFUNC)
 562                         IEEE80211_DEBUG_DROP("RX: dropped data frame "
 563                                              "with no data (type=0x%02x, "
 564                                              "subtype=0x%02x, len=%d)\n",
 565                                              type, stype, skb->len);
 566                 goto rx_dropped;
 567         }
 568
 569         /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
 570
 571         if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
 572             (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0)
 573                 goto rx_dropped;
 574
 575         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 576
 577         /* skb: hdr + (possibly fragmented) plaintext payload */
 578         // PR: FIXME: hostap has additional conditions in the "if" below:
 579         // ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
 580         if ((frag != 0) || (fc & IEEE80211_FCTL_MOREFRAGS)) {
 581                 int flen;
 582                 struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr);
 583                 IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
 584
 585                 if (!frag_skb) {
 586                         IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG,
 587                                         "Rx cannot get skb from fragment "
 588                                         "cache (morefrag=%d seq=%u frag=%u)\n",
 589                                         (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
 590                                         WLAN_GET_SEQ_SEQ(sc), frag);
 591                         goto rx_dropped;
 592                 }
 593
 594                 flen = skb->len;
 595                 if (frag != 0)
 596                         flen -= hdrlen;
 597
 598                 if (frag_skb->tail + flen > frag_skb->end) {
 599                         printk(KERN_WARNING "%s: host decrypted and "
 600                                "reassembled frame did not fit skb\n",
 601                                dev->name);
 602                         ieee80211_frag_cache_invalidate(ieee, hdr);
 603                         goto rx_dropped;
 604                 }
 605
 606                 if (frag == 0) {
 607                         /* copy first fragment (including full headers) into
 608                          * beginning of the fragment cache skb */
 609                         skb_copy_from_linear_data(skb, skb_put(frag_skb, flen), flen);
 610                 } else {
 611                         /* append frame payload to the end of the fragment
 612                          * cache skb */
 613                         skb_copy_from_linear_data_offset(skb, hdrlen,
 614                                       skb_put(frag_skb, flen), flen);
 615                 }
 616                 dev_kfree_skb_any(skb);
 617                 skb = NULL;
 618
 619                 if (fc & IEEE80211_FCTL_MOREFRAGS) {
 620                         /* more fragments expected - leave the skb in fragment
 621                          * cache for now; it will be delivered to upper layers
 622                          * after all fragments have been received */
 623                         goto rx_exit;
 624                 }
 625
 626                 /* this was the last fragment and the frame will be
 627                  * delivered, so remove skb from fragment cache */
 628                 skb = frag_skb;
 629                 hdr = (struct ieee80211_hdr_4addr *)skb->data;
 630                 ieee80211_frag_cache_invalidate(ieee, hdr);
 631         }
 632
 633         /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
 634          * encrypted/authenticated */
 635         if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
 636             ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
 637                 goto rx_dropped;
 638
 639         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 640         if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep) {
 641                 if (            /*ieee->ieee802_1x && */
 642                            ieee80211_is_eapol_frame(ieee, skb)) {
 643                         /* pass unencrypted EAPOL frames even if encryption is
 644                          * configured */
 645                 } else {
 646                         IEEE80211_DEBUG_DROP("encryption configured, but RX "
 647                                              "frame not encrypted (SA=" MAC_FMT
 648                                              ")\n", MAC_ARG(hdr->addr2));
 649                         goto rx_dropped;
 650                 }
 651         }
 652
 653         if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep &&
 654             !ieee80211_is_eapol_frame(ieee, skb)) {
 655                 IEEE80211_DEBUG_DROP("dropped unencrypted RX data "
 656                                      "frame from " MAC_FMT
 657                                      " (drop_unencrypted=1)\n",
 658                                      MAC_ARG(hdr->addr2));
 659                 goto rx_dropped;
 660         }
 661
 662         /* If the frame was decrypted in hardware, we may need to strip off
 663          * any security data (IV, ICV, etc) that was left behind */
 664         if (!can_be_decrypted && (fc & IEEE80211_FCTL_PROTECTED) &&
 665             ieee->host_strip_iv_icv) {
 666                 int trimlen = 0;
 667
 668                 /* Top two-bits of byte 3 are the key index */
 669                 if (skb->len >= hdrlen + 3)
 670                         keyidx = skb->data[hdrlen + 3] >> 6;
 671
 672                 /* To strip off any security data which appears before the
 673                  * payload, we simply increase hdrlen (as the header gets
 674                  * chopped off immediately below). For the security data which
 675                  * appears after the payload, we use skb_trim. */
 676
 677                 switch (ieee->sec.encode_alg[keyidx]) {
 678                 case SEC_ALG_WEP:
 679                         /* 4 byte IV */
 680                         hdrlen += 4;
 681                         /* 4 byte ICV */
 682                         trimlen = 4;
 683                         break;
 684                 case SEC_ALG_TKIP:
 685                         /* 4 byte IV, 4 byte ExtIV */
 686                         hdrlen += 8;
 687                         /* 8 byte MIC, 4 byte ICV */
 688                         trimlen = 12;
 689                         break;
 690                 case SEC_ALG_CCMP:
 691                         /* 8 byte CCMP header */
 692                         hdrlen += 8;
 693                         /* 8 byte MIC */
 694                         trimlen = 8;
 695                         break;
 696                 }
 697
 698                 if (skb->len < trimlen)
 699                         goto rx_dropped;
 700
 701                 __skb_trim(skb, skb->len - trimlen);
 702
 703                 if (skb->len < hdrlen)
 704                         goto rx_dropped;
 705         }
 706
 707         /* skb: hdr + (possible reassembled) full plaintext payload */
 708
 709         payload = skb->data + hdrlen;
 710         ethertype = (payload[6] << 8) | payload[7];
 711
 712 #ifdef NOT_YET
 713         /* If IEEE 802.1X is used, check whether the port is authorized to send
 714          * the received frame. */
 715         if (ieee->ieee802_1x && ieee->iw_mode == IW_MODE_MASTER) {
 716                 if (ethertype == ETH_P_PAE) {
 717                         printk(KERN_DEBUG "%s: RX: IEEE 802.1X frame\n",
 718                                dev->name);
 719                         if (ieee->hostapd && ieee->apdev) {
 720                                 /* Send IEEE 802.1X frames to the user
 721                                  * space daemon for processing */
 722                                 prism2_rx_80211(ieee->apdev, skb, rx_stats,
 723                                                 PRISM2_RX_MGMT);
 724                                 ieee->apdevstats.rx_packets++;
 725                                 ieee->apdevstats.rx_bytes += skb->len;
 726                                 goto rx_exit;
 727                         }
 728                 } else if (!frame_authorized) {
 729                         printk(KERN_DEBUG "%s: dropped frame from "
 730                                "unauthorized port (IEEE 802.1X): "
 731                                "ethertype=0x%04x\n", dev->name, ethertype);
 732                         goto rx_dropped;
 733                 }
 734         }
 735 #endif
 736
 737         /* convert hdr + possible LLC headers into Ethernet header */
 738         if (skb->len - hdrlen >= 8 &&
 739             ((memcmp(payload, rfc1042_header, SNAP_SIZE) == 0 &&
 740               ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
 741              memcmp(payload, bridge_tunnel_header, SNAP_SIZE) == 0)) {
 742                 /* remove RFC1042 or Bridge-Tunnel encapsulation and
 743                  * replace EtherType */
 744                 skb_pull(skb, hdrlen + SNAP_SIZE);
 745                 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
 746                 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
 747         } else {
 748                 u16 len;
 749                 /* Leave Ethernet header part of hdr and full payload */
 750                 skb_pull(skb, hdrlen);
 751                 len = htons(skb->len);
 752                 memcpy(skb_push(skb, 2), &len, 2);
 753                 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
 754                 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
 755         }
 756
 757 #ifdef NOT_YET
 758         if (wds && ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 759                     IEEE80211_FCTL_TODS) && skb->len >= ETH_HLEN + ETH_ALEN) {
 760                 /* Non-standard frame: get addr4 from its bogus location after
 761                  * the payload */
 762                 skb_copy_to_linear_data_offset(skb, ETH_ALEN,
 763                                                skb->data + skb->len - ETH_ALEN,
 764                                                ETH_ALEN);
 765                 skb_trim(skb, skb->len - ETH_ALEN);
 766         }
 767 #endif
 768
 769         stats->rx_packets++;
 770         stats->rx_bytes += skb->len;
 771
 772 #ifdef NOT_YET
 773         if (ieee->iw_mode == IW_MODE_MASTER && !wds && ieee->ap->bridge_packets) {
 774                 if (dst[0] & 0x01) {
 775                         /* copy multicast frame both to the higher layers and
 776                          * to the wireless media */
 777                         ieee->ap->bridged_multicast++;
 778                         skb2 = skb_clone(skb, GFP_ATOMIC);
 779                         if (skb2 == NULL)
 780                                 printk(KERN_DEBUG "%s: skb_clone failed for "
 781                                        "multicast frame\n", dev->name);
 782                 } else if (hostap_is_sta_assoc(ieee->ap, dst)) {
 783                         /* send frame directly to the associated STA using
 784                          * wireless media and not passing to higher layers */
 785                         ieee->ap->bridged_unicast++;
 786                         skb2 = skb;
 787                         skb = NULL;
 788                 }
 789         }
 790
 791         if (skb2 != NULL) {
 792                 /* send to wireless media */
 793                 skb2->dev = dev;
 794                 skb2->protocol = __constant_htons(ETH_P_802_3);
 795                 skb_reset_mac_header(skb2);
 796                 skb_reset_network_header(skb2);
 797                 /* skb2->network_header += ETH_HLEN; */
 798                 dev_queue_xmit(skb2);
 799         }
 800 #endif
 801
 802         if (skb) {
 803                 skb->protocol = eth_type_trans(skb, dev);
 804                 memset(skb->cb, 0, sizeof(skb->cb));
 805                 skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
 806                 if (netif_rx(skb) == NET_RX_DROP) {
 807                         /* netif_rx always succeeds, but it might drop
 808                          * the packet.  If it drops the packet, we log that
 809                          * in our stats. */
 810                         IEEE80211_DEBUG_DROP
 811                             ("RX: netif_rx dropped the packet\n");
 812                         stats->rx_dropped++;
 813                 }
 814         }
 815
 816       rx_exit:
 817 #ifdef NOT_YET
 818         if (sta)
 819                 hostap_handle_sta_release(sta);
 820 #endif
 821         return 1;
 822
 823       rx_dropped:
 824         stats->rx_dropped++;
 825
 826         /* Returning 0 indicates to caller that we have not handled the SKB--
 827          * so it is still allocated and can be used again by underlying
 828          * hardware as a DMA target */
 829         return 0;
 830 }
 831
 832 /* Filter out unrelated packets, call ieee80211_rx[_mgt]
 833  * This function takes over the skb, it should not be used again after calling
 834  * this function. */
 835 void ieee80211_rx_any(struct ieee80211_device *ieee,
 836                      struct sk_buff *skb, struct ieee80211_rx_stats *stats)
 837 {
 838         struct ieee80211_hdr_4addr *hdr;
 839         int is_packet_for_us;
 840         u16 fc;
 841
 842         if (ieee->iw_mode == IW_MODE_MONITOR) {
 843                 if (!ieee80211_rx(ieee, skb, stats))
 844                         dev_kfree_skb_irq(skb);
 845                 return;
 846         }
 847
 848         if (skb->len < sizeof(struct ieee80211_hdr))
 849                 goto drop_free;
 850
 851         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 852         fc = le16_to_cpu(hdr->frame_ctl);
 853
 854         if ((fc & IEEE80211_FCTL_VERS) != 0)
 855                 goto drop_free;
 856
 857         switch (fc & IEEE80211_FCTL_FTYPE) {
 858         case IEEE80211_FTYPE_MGMT:
 859                 if (skb->len < sizeof(struct ieee80211_hdr_3addr))
 860                         goto drop_free;
 861                 ieee80211_rx_mgt(ieee, hdr, stats);
 862                 dev_kfree_skb_irq(skb);
 863                 return;
 864         case IEEE80211_FTYPE_DATA:
 865                 break;
 866         case IEEE80211_FTYPE_CTL:
 867                 return;
 868         default:
 869                 return;
 870         }
 871
 872         is_packet_for_us = 0;
 873         switch (ieee->iw_mode) {
 874         case IW_MODE_ADHOC:
 875                 /* our BSS and not from/to DS */
 876                 if (memcmp(hdr->addr3, ieee->bssid, ETH_ALEN) == 0)
 877                 if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == 0) {
 878                         /* promisc: get all */
 879                         if (ieee->dev->flags & IFF_PROMISC)
 880                                 is_packet_for_us = 1;
 881                         /* to us */
 882                         else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0)
 883                                 is_packet_for_us = 1;
 884                         /* mcast */
 885                         else if (is_multicast_ether_addr(hdr->addr1))
 886                                 is_packet_for_us = 1;
 887                 }
 888                 break;
 889         case IW_MODE_INFRA:
 890                 /* our BSS (== from our AP) and from DS */
 891                 if (memcmp(hdr->addr2, ieee->bssid, ETH_ALEN) == 0)
 892                 if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS) {
 893                         /* promisc: get all */
 894                         if (ieee->dev->flags & IFF_PROMISC)
 895                                 is_packet_for_us = 1;
 896                         /* to us */
 897                         else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0)
 898                                 is_packet_for_us = 1;
 899                         /* mcast */
 900                         else if (is_multicast_ether_addr(hdr->addr1)) {
 901                                 /* not our own packet bcasted from AP */
 902                                 if (memcmp(hdr->addr3, ieee->dev->dev_addr, ETH_ALEN))
 903                                         is_packet_for_us = 1;
 904                         }
 905                 }
 906                 break;
 907         default:
 908                 /* ? */
 909                 break;
 910         }
 911
 912         if (is_packet_for_us)
 913                 if (!ieee80211_rx(ieee, skb, stats))
 914                         dev_kfree_skb_irq(skb);
 915         return;
 916
 917 drop_free:
 918         dev_kfree_skb_irq(skb);
 919         ieee->stats.rx_dropped++;
 920         return;
 921 }
 922
 923 #define MGMT_FRAME_FIXED_PART_LENGTH            0x24
 924
 925 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
 926
 927 /*
 928 * Make ther structure we read from the beacon packet has
 929 * the right values
 930 */
 931 static int ieee80211_verify_qos_info(struct ieee80211_qos_information_element
 932                                      *info_element, int sub_type)
 933 {
 934
 935         if (info_element->qui_subtype != sub_type)
 936                 return -1;
 937         if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
 938                 return -1;
 939         if (info_element->qui_type != QOS_OUI_TYPE)
 940                 return -1;
 941         if (info_element->version != QOS_VERSION_1)
 942                 return -1;
 943
 944         return 0;
 945 }
 946
 947 /*
 948  * Parse a QoS parameter element
 949  */
 950 static int ieee80211_read_qos_param_element(struct ieee80211_qos_parameter_info
 951                                             *element_param, struct ieee80211_info_element
 952                                             *info_element)
 953 {
 954         int ret = 0;
 955         u16 size = sizeof(struct ieee80211_qos_parameter_info) - 2;
 956
 957         if ((info_element == NULL) || (element_param == NULL))
 958                 return -1;
 959
 960         if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
 961                 memcpy(element_param->info_element.qui, info_element->data,
 962                        info_element->len);
 963                 element_param->info_element.elementID = info_element->id;
 964                 element_param->info_element.length = info_element->len;
 965         } else
 966                 ret = -1;
 967         if (ret == 0)
 968                 ret = ieee80211_verify_qos_info(&element_param->info_element,
 969                                                 QOS_OUI_PARAM_SUB_TYPE);
 970         return ret;
 971 }
 972
 973 /*
 974  * Parse a QoS information element
 975  */
 976 static int ieee80211_read_qos_info_element(struct
 977                                            ieee80211_qos_information_element
 978                                            *element_info, struct ieee80211_info_element
 979                                            *info_element)
 980 {
 981         int ret = 0;
 982         u16 size = sizeof(struct ieee80211_qos_information_element) - 2;
 983
 984         if (element_info == NULL)
 985                 return -1;
 986         if (info_element == NULL)
 987                 return -1;
 988
 989         if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
 990                 memcpy(element_info->qui, info_element->data,
 991                        info_element->len);
 992                 element_info->elementID = info_element->id;
 993                 element_info->length = info_element->len;
 994         } else
 995                 ret = -1;
 996
 997         if (ret == 0)
 998                 ret = ieee80211_verify_qos_info(element_info,
 999                                                 QOS_OUI_INFO_SUB_TYPE);
1000         return ret;
1001 }
1002
1003 /*
1004  * Write QoS parameters from the ac parameters.
1005  */
1006 static int ieee80211_qos_convert_ac_to_parameters(struct
1007                                                   ieee80211_qos_parameter_info
1008                                                   *param_elm, struct
1009                                                   ieee80211_qos_parameters
1010                                                   *qos_param)
1011 {
1012         int rc = 0;
1013         int i;
1014         struct ieee80211_qos_ac_parameter *ac_params;
1015         u32 txop;
1016         u8 cw_min;
1017         u8 cw_max;
1018
1019         for (i = 0; i < QOS_QUEUE_NUM; i++) {
1020                 ac_params = &(param_elm->ac_params_record[i]);
1021
1022                 qos_param->aifs[i] = (ac_params->aci_aifsn) & 0x0F;
1023                 qos_param->aifs[i] -= (qos_param->aifs[i] < 2) ? 0 : 2;
1024
1025                 cw_min = ac_params->ecw_min_max & 0x0F;
1026                 qos_param->cw_min[i] = (u16) ((1 << cw_min) - 1);
1027
1028                 cw_max = (ac_params->ecw_min_max & 0xF0) >> 4;
1029                 qos_param->cw_max[i] = (u16) ((1 << cw_max) - 1);
1030
1031                 qos_param->flag[i] =
1032                     (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1033
1034                 txop = le16_to_cpu(ac_params->tx_op_limit) * 32;
1035                 qos_param->tx_op_limit[i] = (u16) txop;
1036         }
1037         return rc;
1038 }
1039
1040 /*
1041  * we have a generic data element which it may contain QoS information or
1042  * parameters element. check the information element length to decide
1043  * which type to read
1044  */
1045 static int ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element
1046                                              *info_element,
1047                                              struct ieee80211_network *network)
1048 {
1049         int rc = 0;
1050         struct ieee80211_qos_parameters *qos_param = NULL;
1051         struct ieee80211_qos_information_element qos_info_element;
1052
1053         rc = ieee80211_read_qos_info_element(&qos_info_element, info_element);
1054
1055         if (rc == 0) {
1056                 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1057                 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1058         } else {
1059                 struct ieee80211_qos_parameter_info param_element;
1060
1061                 rc = ieee80211_read_qos_param_element(&param_element,
1062                                                       info_element);
1063                 if (rc == 0) {
1064                         qos_param = &(network->qos_data.parameters);
1065                         ieee80211_qos_convert_ac_to_parameters(&param_element,
1066                                                                qos_param);
1067                         network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1068                         network->qos_data.param_count =
1069                             param_element.info_element.ac_info & 0x0F;
1070                 }
1071         }
1072
1073         if (rc == 0) {
1074                 IEEE80211_DEBUG_QOS("QoS is supported\n");
1075                 network->qos_data.supported = 1;
1076         }
1077         return rc;
1078 }
1079
1080 #ifdef CONFIG_IEEE80211_DEBUG
1081 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
1082
1083 static const char *get_info_element_string(u16 id)
1084 {
1085         switch (id) {
1086                 MFIE_STRING(SSID);
1087                 MFIE_STRING(RATES);
1088                 MFIE_STRING(FH_SET);
1089                 MFIE_STRING(DS_SET);
1090                 MFIE_STRING(CF_SET);
1091                 MFIE_STRING(TIM);
1092                 MFIE_STRING(IBSS_SET);
1093                 MFIE_STRING(COUNTRY);
1094                 MFIE_STRING(HOP_PARAMS);
1095                 MFIE_STRING(HOP_TABLE);
1096                 MFIE_STRING(REQUEST);
1097                 MFIE_STRING(CHALLENGE);
1098                 MFIE_STRING(POWER_CONSTRAINT);
1099                 MFIE_STRING(POWER_CAPABILITY);
1100                 MFIE_STRING(TPC_REQUEST);
1101                 MFIE_STRING(TPC_REPORT);
1102                 MFIE_STRING(SUPP_CHANNELS);
1103                 MFIE_STRING(CSA);
1104                 MFIE_STRING(MEASURE_REQUEST);
1105                 MFIE_STRING(MEASURE_REPORT);
1106                 MFIE_STRING(QUIET);
1107                 MFIE_STRING(IBSS_DFS);
1108                 MFIE_STRING(ERP_INFO);
1109                 MFIE_STRING(RSN);
1110                 MFIE_STRING(RATES_EX);
1111                 MFIE_STRING(GENERIC);
1112                 MFIE_STRING(QOS_PARAMETER);
1113         default:
1114                 return "UNKNOWN";
1115         }
1116 }
1117 #endif
1118
1119 static int ieee80211_parse_info_param(struct ieee80211_info_element
1120                                       *info_element, u16 length,
1121                                       struct ieee80211_network *network)
1122 {
1123         u8 i;
1124 #ifdef CONFIG_IEEE80211_DEBUG
1125         char rates_str[64];
1126         char *p;
1127 #endif
1128
1129         while (length >= sizeof(*info_element)) {
1130                 if (sizeof(*info_element) + info_element->len > length) {
1131                         IEEE80211_DEBUG_MGMT("Info elem: parse failed: "
1132                                              "info_element->len + 2 > left : "
1133                                              "info_element->len+2=%zd left=%d, id=%d.\n",
1134                                              info_element->len +
1135                                              sizeof(*info_element),
1136                                              length, info_element->id);
1137                         /* We stop processing but don't return an error here
1138                          * because some misbehaviour APs break this rule. ie.
1139                          * Orinoco AP1000. */
1140                         break;
1141                 }
1142
1143                 switch (info_element->id) {
1144                 case MFIE_TYPE_SSID:
1145                         if (ieee80211_is_empty_essid(info_element->data,
1146                                                      info_element->len)) {
1147                                 network->flags |= NETWORK_EMPTY_ESSID;
1148                                 break;
1149                         }
1150
1151                         network->ssid_len = min(info_element->len,
1152                                                 (u8) IW_ESSID_MAX_SIZE);
1153                         memcpy(network->ssid, info_element->data,
1154                                network->ssid_len);
1155                         if (network->ssid_len < IW_ESSID_MAX_SIZE)
1156                                 memset(network->ssid + network->ssid_len, 0,
1157                                        IW_ESSID_MAX_SIZE - network->ssid_len);
1158
1159                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
1160                                              network->ssid, network->ssid_len);
1161                         break;
1162
1163                 case MFIE_TYPE_RATES:
1164 #ifdef CONFIG_IEEE80211_DEBUG
1165                         p = rates_str;
1166 #endif
1167                         network->rates_len = min(info_element->len,
1168                                                  MAX_RATES_LENGTH);
1169                         for (i = 0; i < network->rates_len; i++) {
1170                                 network->rates[i] = info_element->data[i];
1171 #ifdef CONFIG_IEEE80211_DEBUG
1172                                 p += snprintf(p, sizeof(rates_str) -
1173                                               (p - rates_str), "%02X ",
1174                                               network->rates[i]);
1175 #endif
1176                                 if (ieee80211_is_ofdm_rate
1177                                     (info_element->data[i])) {
1178                                         network->flags |= NETWORK_HAS_OFDM;
1179                                         if (info_element->data[i] &
1180                                             IEEE80211_BASIC_RATE_MASK)
1181                                                 network->flags &=
1182                                                     ~NETWORK_HAS_CCK;
1183                                 }
1184                         }
1185
1186                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
1187                                              rates_str, network->rates_len);
1188                         break;
1189
1190                 case MFIE_TYPE_RATES_EX:
1191 #ifdef CONFIG_IEEE80211_DEBUG
1192                         p = rates_str;
1193 #endif
1194                         network->rates_ex_len = min(info_element->len,
1195                                                     MAX_RATES_EX_LENGTH);
1196                         for (i = 0; i < network->rates_ex_len; i++) {
1197                                 network->rates_ex[i] = info_element->data[i];
1198 #ifdef CONFIG_IEEE80211_DEBUG
1199                                 p += snprintf(p, sizeof(rates_str) -
1200                                               (p - rates_str), "%02X ",
1201                                               network->rates[i]);
1202 #endif
1203                                 if (ieee80211_is_ofdm_rate
1204                                     (info_element->data[i])) {
1205                                         network->flags |= NETWORK_HAS_OFDM;
1206                                         if (info_element->data[i] &
1207                                             IEEE80211_BASIC_RATE_MASK)
1208                                                 network->flags &=
1209                                                     ~NETWORK_HAS_CCK;
1210                                 }
1211                         }
1212
1213                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1214                                              rates_str, network->rates_ex_len);
1215                         break;
1216
1217                 case MFIE_TYPE_DS_SET:
1218                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
1219                                              info_element->data[0]);
1220                         network->channel = info_element->data[0];
1221                         break;
1222
1223                 case MFIE_TYPE_FH_SET:
1224                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
1225                         break;
1226
1227                 case MFIE_TYPE_CF_SET:
1228                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
1229                         break;
1230
1231                 case MFIE_TYPE_TIM:
1232                         network->tim.tim_count = info_element->data[0];
1233                         network->tim.tim_period = info_element->data[1];
1234                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_TIM: partially ignored\n");
1235                         break;
1236
1237                 case MFIE_TYPE_ERP_INFO:
1238                         network->erp_value = info_element->data[0];
1239                         network->flags |= NETWORK_HAS_ERP_VALUE;
1240                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1241                                              network->erp_value);
1242                         break;
1243
1244                 case MFIE_TYPE_IBSS_SET:
1245                         network->atim_window = info_element->data[0];
1246                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
1247                                              network->atim_window);
1248                         break;
1249
1250                 case MFIE_TYPE_CHALLENGE:
1251                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
1252                         break;
1253
1254                 case MFIE_TYPE_GENERIC:
1255                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
1256                                              info_element->len);
1257                         if (!ieee80211_parse_qos_info_param_IE(info_element,
1258                                                                network))
1259                                 break;
1260
1261                         if (info_element->len >= 4 &&
1262                             info_element->data[0] == 0x00 &&
1263                             info_element->data[1] == 0x50 &&
1264                             info_element->data[2] == 0xf2 &&
1265                             info_element->data[3] == 0x01) {
1266                                 network->wpa_ie_len = min(info_element->len + 2,
1267                                                           MAX_WPA_IE_LEN);
1268                                 memcpy(network->wpa_ie, info_element,
1269                                        network->wpa_ie_len);
1270                         }
1271                         break;
1272
1273                 case MFIE_TYPE_RSN:
1274                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
1275                                              info_element->len);
1276                         network->rsn_ie_len = min(info_element->len + 2,
1277                                                   MAX_WPA_IE_LEN);
1278                         memcpy(network->rsn_ie, info_element,
1279                                network->rsn_ie_len);
1280                         break;
1281
1282                 case MFIE_TYPE_QOS_PARAMETER:
1283                         printk(KERN_ERR
1284                                "QoS Error need to parse QOS_PARAMETER IE\n");
1285                         break;
1286                         /* 802.11h */
1287                 case MFIE_TYPE_POWER_CONSTRAINT:
1288                         network->power_constraint = info_element->data[0];
1289                         network->flags |= NETWORK_HAS_POWER_CONSTRAINT;
1290                         break;
1291
1292                 case MFIE_TYPE_CSA:
1293                         network->power_constraint = info_element->data[0];
1294                         network->flags |= NETWORK_HAS_CSA;
1295                         break;
1296
1297                 case MFIE_TYPE_QUIET:
1298                         network->quiet.count = info_element->data[0];
1299                         network->quiet.period = info_element->data[1];
1300                         network->quiet.duration = info_element->data[2];
1301                         network->quiet.offset = info_element->data[3];
1302                         network->flags |= NETWORK_HAS_QUIET;
1303                         break;
1304
1305                 case MFIE_TYPE_IBSS_DFS:
1306                         if (network->ibss_dfs)
1307                                 break;
1308                         network->ibss_dfs = kmemdup(info_element->data,
1309                                                     info_element->len,
1310                                                     GFP_ATOMIC);
1311                         if (!network->ibss_dfs)
1312                                 return 1;
1313                         network->flags |= NETWORK_HAS_IBSS_DFS;
1314                         break;
1315
1316                 case MFIE_TYPE_TPC_REPORT:
1317                         network->tpc_report.transmit_power =
1318                             info_element->data[0];
1319                         network->tpc_report.link_margin = info_element->data[1];
1320                         network->flags |= NETWORK_HAS_TPC_REPORT;
1321                         break;
1322
1323                 default:
1324                         IEEE80211_DEBUG_MGMT
1325                             ("Unsupported info element: %s (%d)\n",
1326                              get_info_element_string(info_element->id),
1327                              info_element->id);
1328                         break;
1329                 }
1330
1331                 length -= sizeof(*info_element) + info_element->len;
1332                 info_element =
1333                     (struct ieee80211_info_element *)&info_element->
1334                     data[info_element->len];
1335         }
1336
1337         return 0;
1338 }
1339
1340 static int ieee80211_handle_assoc_resp(struct ieee80211_device *ieee, struct ieee80211_assoc_response
1341                                        *frame, struct ieee80211_rx_stats *stats)
1342 {
1343         struct ieee80211_network network_resp = {
1344                 .ibss_dfs = NULL,
1345         };
1346         struct ieee80211_network *network = &network_resp;
1347         struct net_device *dev = ieee->dev;
1348
1349         network->flags = 0;
1350         network->qos_data.active = 0;
1351         network->qos_data.supported = 0;
1352         network->qos_data.param_count = 0;
1353         network->qos_data.old_param_count = 0;
1354
1355         //network->atim_window = le16_to_cpu(frame->aid) & (0x3FFF);
1356         network->atim_window = le16_to_cpu(frame->aid);
1357         network->listen_interval = le16_to_cpu(frame->status);
1358         memcpy(network->bssid, frame->header.addr3, ETH_ALEN);
1359         network->capability = le16_to_cpu(frame->capability);
1360         network->last_scanned = jiffies;
1361         network->rates_len = network->rates_ex_len = 0;
1362         network->last_associate = 0;
1363         network->ssid_len = 0;
1364         network->erp_value =
1365             (network->capability & WLAN_CAPABILITY_IBSS) ? 0x3 : 0x0;
1366
1367         if (stats->freq == IEEE80211_52GHZ_BAND) {
1368                 /* for A band (No DS info) */
1369                 network->channel = stats->received_channel;
1370         } else
1371                 network->flags |= NETWORK_HAS_CCK;
1372
1373         network->wpa_ie_len = 0;
1374         network->rsn_ie_len = 0;
1375
1376         if (ieee80211_parse_info_param
1377             (frame->info_element, stats->len - sizeof(*frame), network))
1378                 return 1;
1379
1380         network->mode = 0;
1381         if (stats->freq == IEEE80211_52GHZ_BAND)
1382                 network->mode = IEEE_A;
1383         else {
1384                 if (network->flags & NETWORK_HAS_OFDM)
1385                         network->mode |= IEEE_G;
1386                 if (network->flags & NETWORK_HAS_CCK)
1387                         network->mode |= IEEE_B;
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         if (ieee->handle_assoc_response != NULL)
1396                 ieee->handle_assoc_response(dev, frame, network);
1397
1398         return 0;
1399 }
1400
1401 /***************************************************/
1402
1403 static int ieee80211_network_init(struct ieee80211_device *ieee, struct ieee80211_probe_response
1404                                          *beacon,
1405                                          struct ieee80211_network *network,
1406                                          struct ieee80211_rx_stats *stats)
1407 {
1408         network->qos_data.active = 0;
1409         network->qos_data.supported = 0;
1410         network->qos_data.param_count = 0;
1411         network->qos_data.old_param_count = 0;
1412
1413         /* Pull out fixed field data */
1414         memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
1415         network->capability = le16_to_cpu(beacon->capability);
1416         network->last_scanned = jiffies;
1417         network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
1418         network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
1419         network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
1420         /* Where to pull this? beacon->listen_interval; */
1421         network->listen_interval = 0x0A;
1422         network->rates_len = network->rates_ex_len = 0;
1423         network->last_associate = 0;
1424         network->ssid_len = 0;
1425         network->flags = 0;
1426         network->atim_window = 0;
1427         network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
1428             0x3 : 0x0;
1429
1430         if (stats->freq == IEEE80211_52GHZ_BAND) {
1431                 /* for A band (No DS info) */
1432                 network->channel = stats->received_channel;
1433         } else
1434                 network->flags |= NETWORK_HAS_CCK;
1435
1436         network->wpa_ie_len = 0;
1437         network->rsn_ie_len = 0;
1438
1439         if (ieee80211_parse_info_param
1440             (beacon->info_element, stats->len - sizeof(*beacon), network))
1441                 return 1;
1442
1443         network->mode = 0;
1444         if (stats->freq == IEEE80211_52GHZ_BAND)
1445                 network->mode = IEEE_A;
1446         else {
1447                 if (network->flags & NETWORK_HAS_OFDM)
1448                         network->mode |= IEEE_G;
1449                 if (network->flags & NETWORK_HAS_CCK)
1450                         network->mode |= IEEE_B;
1451         }
1452
1453         if (network->mode == 0) {
1454                 IEEE80211_DEBUG_SCAN("Filtered out '%s (" MAC_FMT ")' "
1455                                      "network.\n",
1456                                      escape_essid(network->ssid,
1457                                                   network->ssid_len),
1458                                      MAC_ARG(network->bssid));
1459                 return 1;
1460         }
1461
1462         if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
1463                 network->flags |= NETWORK_EMPTY_ESSID;
1464
1465         memcpy(&network->stats, stats, sizeof(network->stats));
1466
1467         return 0;
1468 }
1469
1470 static inline int is_same_network(struct ieee80211_network *src,
1471                                   struct ieee80211_network *dst)
1472 {
1473         /* A network is only a duplicate if the channel, BSSID, and ESSID
1474          * all match.  We treat all <hidden> with the same BSSID and channel
1475          * as one network */
1476         return ((src->ssid_len == dst->ssid_len) &&
1477                 (src->channel == dst->channel) &&
1478                 !compare_ether_addr(src->bssid, dst->bssid) &&
1479                 !memcmp(src->ssid, dst->ssid, src->ssid_len));
1480 }
1481
1482 static void update_network(struct ieee80211_network *dst,
1483                                   struct ieee80211_network *src)
1484 {
1485         int qos_active;
1486         u8 old_param;
1487
1488         ieee80211_network_reset(dst);
1489         dst->ibss_dfs = src->ibss_dfs;
1490
1491         /* We only update the statistics if they were created by receiving
1492          * the network information on the actual channel the network is on.
1493          *
1494          * This keeps beacons received on neighbor channels from bringing
1495          * down the signal level of an AP. */
1496         if (dst->channel == src->stats.received_channel)
1497                 memcpy(&dst->stats, &src->stats,
1498                        sizeof(struct ieee80211_rx_stats));
1499         else
1500                 IEEE80211_DEBUG_SCAN("Network " MAC_FMT " info received "
1501                         "off channel (%d vs. %d)\n", MAC_ARG(src->bssid),
1502                         dst->channel, src->stats.received_channel);
1503
1504         dst->capability = src->capability;
1505         memcpy(dst->rates, src->rates, src->rates_len);
1506         dst->rates_len = src->rates_len;
1507         memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
1508         dst->rates_ex_len = src->rates_ex_len;
1509
1510         dst->mode = src->mode;
1511         dst->flags = src->flags;
1512         dst->time_stamp[0] = src->time_stamp[0];
1513         dst->time_stamp[1] = src->time_stamp[1];
1514
1515         dst->beacon_interval = src->beacon_interval;
1516         dst->listen_interval = src->listen_interval;
1517         dst->atim_window = src->atim_window;
1518         dst->erp_value = src->erp_value;
1519         dst->tim = src->tim;
1520
1521         memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
1522         dst->wpa_ie_len = src->wpa_ie_len;
1523         memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
1524         dst->rsn_ie_len = src->rsn_ie_len;
1525
1526         dst->last_scanned = jiffies;
1527         qos_active = src->qos_data.active;
1528         old_param = dst->qos_data.old_param_count;
1529         if (dst->flags & NETWORK_HAS_QOS_MASK)
1530                 memcpy(&dst->qos_data, &src->qos_data,
1531                        sizeof(struct ieee80211_qos_data));
1532         else {
1533                 dst->qos_data.supported = src->qos_data.supported;
1534                 dst->qos_data.param_count = src->qos_data.param_count;
1535         }
1536
1537         if (dst->qos_data.supported == 1) {
1538                 if (dst->ssid_len)
1539                         IEEE80211_DEBUG_QOS
1540                             ("QoS the network %s is QoS supported\n",
1541                              dst->ssid);
1542                 else
1543                         IEEE80211_DEBUG_QOS
1544                             ("QoS the network is QoS supported\n");
1545         }
1546         dst->qos_data.active = qos_active;
1547         dst->qos_data.old_param_count = old_param;
1548
1549         /* dst->last_associate is not overwritten */
1550 }
1551
1552 static inline int is_beacon(__le16 fc)
1553 {
1554         return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON);
1555 }
1556
1557 static void ieee80211_process_probe_response(struct ieee80211_device
1558                                                     *ieee, struct
1559                                                     ieee80211_probe_response
1560                                                     *beacon, struct ieee80211_rx_stats
1561                                                     *stats)
1562 {
1563         struct net_device *dev = ieee->dev;
1564         struct ieee80211_network network = {
1565                 .ibss_dfs = NULL,
1566         };
1567         struct ieee80211_network *target;
1568         struct ieee80211_network *oldest = NULL;
1569 #ifdef CONFIG_IEEE80211_DEBUG
1570         struct ieee80211_info_element *info_element = beacon->info_element;
1571 #endif
1572         unsigned long flags;
1573
1574         IEEE80211_DEBUG_SCAN("'%s' (" MAC_FMT
1575                              "): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
1576                              escape_essid(info_element->data,
1577                                           info_element->len),
1578                              MAC_ARG(beacon->header.addr3),
1579                              (beacon->capability & (1 << 0xf)) ? '1' : '0',
1580                              (beacon->capability & (1 << 0xe)) ? '1' : '0',
1581                              (beacon->capability & (1 << 0xd)) ? '1' : '0',
1582                              (beacon->capability & (1 << 0xc)) ? '1' : '0',
1583                              (beacon->capability & (1 << 0xb)) ? '1' : '0',
1584                              (beacon->capability & (1 << 0xa)) ? '1' : '0',
1585                              (beacon->capability & (1 << 0x9)) ? '1' : '0',
1586                              (beacon->capability & (1 << 0x8)) ? '1' : '0',
1587                              (beacon->capability & (1 << 0x7)) ? '1' : '0',
1588                              (beacon->capability & (1 << 0x6)) ? '1' : '0',
1589                              (beacon->capability & (1 << 0x5)) ? '1' : '0',
1590                              (beacon->capability & (1 << 0x4)) ? '1' : '0',
1591                              (beacon->capability & (1 << 0x3)) ? '1' : '0',
1592                              (beacon->capability & (1 << 0x2)) ? '1' : '0',
1593                              (beacon->capability & (1 << 0x1)) ? '1' : '0',
1594                              (beacon->capability & (1 << 0x0)) ? '1' : '0');
1595
1596         if (ieee80211_network_init(ieee, beacon, &network, stats)) {
1597                 IEEE80211_DEBUG_SCAN("Dropped '%s' (" MAC_FMT ") via %s.\n",
1598                                      escape_essid(info_element->data,
1599                                                   info_element->len),
1600                                      MAC_ARG(beacon->header.addr3),
1601                                      is_beacon(beacon->header.frame_ctl) ?
1602                                      "BEACON" : "PROBE RESPONSE");
1603                 return;
1604         }
1605
1606         /* The network parsed correctly -- so now we scan our known networks
1607          * to see if we can find it in our list.
1608          *
1609          * NOTE:  This search is definitely not optimized.  Once its doing
1610          *        the "right thing" we'll optimize it for efficiency if
1611          *        necessary */
1612
1613         /* Search for this entry in the list and update it if it is
1614          * already there. */
1615
1616         spin_lock_irqsave(&ieee->lock, flags);
1617
1618         list_for_each_entry(target, &ieee->network_list, list) {
1619                 if (is_same_network(target, &network))
1620                         break;
1621
1622                 if ((oldest == NULL) ||
1623                     (target->last_scanned < oldest->last_scanned))
1624                         oldest = target;
1625         }
1626
1627         /* If we didn't find a match, then get a new network slot to initialize
1628          * with this beacon's information */
1629         if (&target->list == &ieee->network_list) {
1630                 if (list_empty(&ieee->network_free_list)) {
1631                         /* If there are no more slots, expire the oldest */
1632                         list_del(&oldest->list);
1633                         target = oldest;
1634                         IEEE80211_DEBUG_SCAN("Expired '%s' (" MAC_FMT ") from "
1635                                              "network list.\n",
1636                                              escape_essid(target->ssid,
1637                                                           target->ssid_len),
1638                                              MAC_ARG(target->bssid));
1639                         ieee80211_network_reset(target);
1640                 } else {
1641                         /* Otherwise just pull from the free list */
1642                         target = list_entry(ieee->network_free_list.next,
1643                                             struct ieee80211_network, list);
1644                         list_del(ieee->network_free_list.next);
1645                 }
1646
1647 #ifdef CONFIG_IEEE80211_DEBUG
1648                 IEEE80211_DEBUG_SCAN("Adding '%s' (" MAC_FMT ") via %s.\n",
1649                                      escape_essid(network.ssid,
1650                                                   network.ssid_len),
1651                                      MAC_ARG(network.bssid),
1652                                      is_beacon(beacon->header.frame_ctl) ?
1653                                      "BEACON" : "PROBE RESPONSE");
1654 #endif
1655                 memcpy(target, &network, sizeof(*target));
1656                 network.ibss_dfs = NULL;
1657                 list_add_tail(&target->list, &ieee->network_list);
1658         } else {
1659                 IEEE80211_DEBUG_SCAN("Updating '%s' (" MAC_FMT ") via %s.\n",
1660                                      escape_essid(target->ssid,
1661                                                   target->ssid_len),
1662                                      MAC_ARG(target->bssid),
1663                                      is_beacon(beacon->header.frame_ctl) ?
1664                                      "BEACON" : "PROBE RESPONSE");
1665                 update_network(target, &network);
1666                 network.ibss_dfs = NULL;
1667         }
1668
1669         spin_unlock_irqrestore(&ieee->lock, flags);
1670
1671         if (is_beacon(beacon->header.frame_ctl)) {
1672                 if (ieee->handle_beacon != NULL)
1673                         ieee->handle_beacon(dev, beacon, target);
1674         } else {
1675                 if (ieee->handle_probe_response != NULL)
1676                         ieee->handle_probe_response(dev, beacon, target);
1677         }
1678 }
1679
1680 void ieee80211_rx_mgt(struct ieee80211_device *ieee,
1681                       struct ieee80211_hdr_4addr *header,
1682                       struct ieee80211_rx_stats *stats)
1683 {
1684         switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
1685         case IEEE80211_STYPE_ASSOC_RESP:
1686                 IEEE80211_DEBUG_MGMT("received ASSOCIATION RESPONSE (%d)\n",
1687                                      WLAN_FC_GET_STYPE(le16_to_cpu
1688                                                        (header->frame_ctl)));
1689                 ieee80211_handle_assoc_resp(ieee,
1690                                             (struct ieee80211_assoc_response *)
1691                                             header, stats);
1692                 break;
1693
1694         case IEEE80211_STYPE_REASSOC_RESP:
1695                 IEEE80211_DEBUG_MGMT("received REASSOCIATION RESPONSE (%d)\n",
1696                                      WLAN_FC_GET_STYPE(le16_to_cpu
1697                                                        (header->frame_ctl)));
1698                 break;
1699
1700         case IEEE80211_STYPE_PROBE_REQ:
1701                 IEEE80211_DEBUG_MGMT("received auth (%d)\n",
1702                                      WLAN_FC_GET_STYPE(le16_to_cpu
1703                                                        (header->frame_ctl)));
1704
1705                 if (ieee->handle_probe_request != NULL)
1706                         ieee->handle_probe_request(ieee->dev,
1707                                                    (struct
1708                                                     ieee80211_probe_request *)
1709                                                    header, stats);
1710                 break;
1711
1712         case IEEE80211_STYPE_PROBE_RESP:
1713                 IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
1714                                      WLAN_FC_GET_STYPE(le16_to_cpu
1715                                                        (header->frame_ctl)));
1716                 IEEE80211_DEBUG_SCAN("Probe response\n");
1717                 ieee80211_process_probe_response(ieee,
1718                                                  (struct
1719                                                   ieee80211_probe_response *)
1720                                                  header, stats);
1721                 break;
1722
1723         case IEEE80211_STYPE_BEACON:
1724                 IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
1725                                      WLAN_FC_GET_STYPE(le16_to_cpu
1726                                                        (header->frame_ctl)));
1727                 IEEE80211_DEBUG_SCAN("Beacon\n");
1728                 ieee80211_process_probe_response(ieee,
1729                                                  (struct
1730                                                   ieee80211_probe_response *)
1731                                                  header, stats);
1732                 break;
1733         case IEEE80211_STYPE_AUTH:
1734
1735                 IEEE80211_DEBUG_MGMT("received auth (%d)\n",
1736                                      WLAN_FC_GET_STYPE(le16_to_cpu
1737                                                        (header->frame_ctl)));
1738
1739                 if (ieee->handle_auth != NULL)
1740                         ieee->handle_auth(ieee->dev,
1741                                           (struct ieee80211_auth *)header);
1742                 break;
1743
1744         case IEEE80211_STYPE_DISASSOC:
1745                 if (ieee->handle_disassoc != NULL)
1746                         ieee->handle_disassoc(ieee->dev,
1747                                               (struct ieee80211_disassoc *)
1748                                               header);
1749                 break;
1750
1751         case IEEE80211_STYPE_ACTION:
1752                 IEEE80211_DEBUG_MGMT("ACTION\n");
1753                 if (ieee->handle_action)
1754                         ieee->handle_action(ieee->dev,
1755                                             (struct ieee80211_action *)
1756                                             header, stats);
1757                 break;
1758
1759         case IEEE80211_STYPE_REASSOC_REQ:
1760                 IEEE80211_DEBUG_MGMT("received reassoc (%d)\n",
1761                                      WLAN_FC_GET_STYPE(le16_to_cpu
1762                                                        (header->frame_ctl)));
1763
1764                 IEEE80211_DEBUG_MGMT("%s: IEEE80211_REASSOC_REQ received\n",
1765                                      ieee->dev->name);
1766                 if (ieee->handle_reassoc_request != NULL)
1767                         ieee->handle_reassoc_request(ieee->dev,
1768                                                     (struct ieee80211_reassoc_request *)
1769                                                      header);
1770                 break;
1771
1772         case IEEE80211_STYPE_ASSOC_REQ:
1773                 IEEE80211_DEBUG_MGMT("received assoc (%d)\n",
1774                                      WLAN_FC_GET_STYPE(le16_to_cpu
1775                                                        (header->frame_ctl)));
1776
1777                 IEEE80211_DEBUG_MGMT("%s: IEEE80211_ASSOC_REQ received\n",
1778                                      ieee->dev->name);
1779                 if (ieee->handle_assoc_request != NULL)
1780                         ieee->handle_assoc_request(ieee->dev);
1781                 break;
1782
1783         case IEEE80211_STYPE_DEAUTH:
1784                 IEEE80211_DEBUG_MGMT("DEAUTH\n");
1785                 if (ieee->handle_deauth != NULL)
1786                         ieee->handle_deauth(ieee->dev,
1787                                             (struct ieee80211_deauth *)
1788                                             header);
1789                 break;
1790         default:
1791                 IEEE80211_DEBUG_MGMT("received UNKNOWN (%d)\n",
1792                                      WLAN_FC_GET_STYPE(le16_to_cpu
1793                                                        (header->frame_ctl)));
1794                 IEEE80211_DEBUG_MGMT("%s: Unknown management packet: %d\n",
1795                                      ieee->dev->name,
1796                                      WLAN_FC_GET_STYPE(le16_to_cpu
1797                                                        (header->frame_ctl)));
1798                 break;
1799         }
1800 }
1801
1802 EXPORT_SYMBOL_GPL(ieee80211_rx_any);
1803 EXPORT_SYMBOL(ieee80211_rx_mgt);
1804 EXPORT_SYMBOL(ieee80211_rx);