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  * <j@w1.fi>
   7  * Copyright (c) 2002-2003, Jouni Malinen <j@w1.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 = 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=%pM) res=%d\n",
 286                                      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=%pM keyidx=%d)\n", ieee->dev->name, hdr->addr2,
 319                        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         if (skb->len < hdrlen) {
 370                 printk(KERN_INFO "%s: invalid SKB length %d\n",
 371                         dev->name, skb->len);
 372                 goto rx_dropped;
 373         }
 374
 375         /* Put this code here so that we avoid duplicating it in all
 376          * Rx paths. - Jean II */
 377 #ifdef CONFIG_WIRELESS_EXT
 378 #ifdef IW_WIRELESS_SPY          /* defined in iw_handler.h */
 379         /* If spy monitoring on */
 380         if (ieee->spy_data.spy_number > 0) {
 381                 struct iw_quality wstats;
 382
 383                 wstats.updated = 0;
 384                 if (rx_stats->mask & IEEE80211_STATMASK_RSSI) {
 385                         wstats.level = rx_stats->signal;
 386                         wstats.updated |= IW_QUAL_LEVEL_UPDATED;
 387                 } else
 388                         wstats.updated |= IW_QUAL_LEVEL_INVALID;
 389
 390                 if (rx_stats->mask & IEEE80211_STATMASK_NOISE) {
 391                         wstats.noise = rx_stats->noise;
 392                         wstats.updated |= IW_QUAL_NOISE_UPDATED;
 393                 } else
 394                         wstats.updated |= IW_QUAL_NOISE_INVALID;
 395
 396                 if (rx_stats->mask & IEEE80211_STATMASK_SIGNAL) {
 397                         wstats.qual = rx_stats->signal;
 398                         wstats.updated |= IW_QUAL_QUAL_UPDATED;
 399                 } else
 400                         wstats.updated |= IW_QUAL_QUAL_INVALID;
 401
 402                 /* Update spy records */
 403                 wireless_spy_update(ieee->dev, hdr->addr2, &wstats);
 404         }
 405 #endif                          /* IW_WIRELESS_SPY */
 406 #endif                          /* CONFIG_WIRELESS_EXT */
 407
 408 #ifdef NOT_YET
 409         hostap_update_rx_stats(local->ap, hdr, rx_stats);
 410 #endif
 411
 412         if (ieee->iw_mode == IW_MODE_MONITOR) {
 413                 stats->rx_packets++;
 414                 stats->rx_bytes += skb->len;
 415                 ieee80211_monitor_rx(ieee, skb, rx_stats);
 416                 return 1;
 417         }
 418
 419         can_be_decrypted = (is_multicast_ether_addr(hdr->addr1) ||
 420                             is_broadcast_ether_addr(hdr->addr2)) ?
 421             ieee->host_mc_decrypt : ieee->host_decrypt;
 422
 423         if (can_be_decrypted) {
 424                 if (skb->len >= hdrlen + 3) {
 425                         /* Top two-bits of byte 3 are the key index */
 426                         keyidx = skb->data[hdrlen + 3] >> 6;
 427                 }
 428
 429                 /* ieee->crypt[] is WEP_KEY (4) in length.  Given that keyidx
 430                  * is only allowed 2-bits of storage, no value of keyidx can
 431                  * be provided via above code that would result in keyidx
 432                  * being out of range */
 433                 crypt = ieee->crypt[keyidx];
 434
 435 #ifdef NOT_YET
 436                 sta = NULL;
 437
 438                 /* Use station specific key to override default keys if the
 439                  * receiver address is a unicast address ("individual RA"). If
 440                  * bcrx_sta_key parameter is set, station specific key is used
 441                  * even with broad/multicast targets (this is against IEEE
 442                  * 802.11, but makes it easier to use different keys with
 443                  * stations that do not support WEP key mapping). */
 444
 445                 if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key)
 446                         (void)hostap_handle_sta_crypto(local, hdr, &crypt,
 447                                                        &sta);
 448 #endif
 449
 450                 /* allow NULL decrypt to indicate an station specific override
 451                  * for default encryption */
 452                 if (crypt && (crypt->ops == NULL ||
 453                               crypt->ops->decrypt_mpdu == NULL))
 454                         crypt = NULL;
 455
 456                 if (!crypt && (fc & IEEE80211_FCTL_PROTECTED)) {
 457                         /* This seems to be triggered by some (multicast?)
 458                          * frames from other than current BSS, so just drop the
 459                          * frames silently instead of filling system log with
 460                          * these reports. */
 461                         IEEE80211_DEBUG_DROP("Decryption failed (not set)"
 462                                              " (SA=%pM)\n", hdr->addr2);
 463                         ieee->ieee_stats.rx_discards_undecryptable++;
 464                         goto rx_dropped;
 465                 }
 466         }
 467 #ifdef NOT_YET
 468         if (type != WLAN_FC_TYPE_DATA) {
 469                 if (type == WLAN_FC_TYPE_MGMT && stype == WLAN_FC_STYPE_AUTH &&
 470                     fc & IEEE80211_FCTL_PROTECTED && ieee->host_decrypt &&
 471                     (keyidx = hostap_rx_frame_decrypt(ieee, skb, crypt)) < 0) {
 472                         printk(KERN_DEBUG "%s: failed to decrypt mgmt::auth "
 473                                "from %pM\n", dev->name, hdr->addr2);
 474                         /* TODO: could inform hostapd about this so that it
 475                          * could send auth failure report */
 476                         goto rx_dropped;
 477                 }
 478
 479                 if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
 480                         goto rx_dropped;
 481                 else
 482                         goto rx_exit;
 483         }
 484 #endif
 485         /* drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.29) */
 486         if (sc == ieee->prev_seq_ctl)
 487                 goto rx_dropped;
 488         else
 489                 ieee->prev_seq_ctl = sc;
 490
 491         /* Data frame - extract src/dst addresses */
 492         if (skb->len < IEEE80211_3ADDR_LEN)
 493                 goto rx_dropped;
 494
 495         switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
 496         case IEEE80211_FCTL_FROMDS:
 497                 memcpy(dst, hdr->addr1, ETH_ALEN);
 498                 memcpy(src, hdr->addr3, ETH_ALEN);
 499                 break;
 500         case IEEE80211_FCTL_TODS:
 501                 memcpy(dst, hdr->addr3, ETH_ALEN);
 502                 memcpy(src, hdr->addr2, ETH_ALEN);
 503                 break;
 504         case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
 505                 if (skb->len < IEEE80211_4ADDR_LEN)
 506                         goto rx_dropped;
 507                 memcpy(dst, hdr->addr3, ETH_ALEN);
 508                 memcpy(src, hdr->addr4, ETH_ALEN);
 509                 break;
 510         case 0:
 511                 memcpy(dst, hdr->addr1, ETH_ALEN);
 512                 memcpy(src, hdr->addr2, ETH_ALEN);
 513                 break;
 514         }
 515
 516 #ifdef NOT_YET
 517         if (hostap_rx_frame_wds(ieee, hdr, fc, &wds))
 518                 goto rx_dropped;
 519         if (wds) {
 520                 skb->dev = dev = wds;
 521                 stats = hostap_get_stats(dev);
 522         }
 523
 524         if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
 525             (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 526             IEEE80211_FCTL_FROMDS && ieee->stadev
 527             && !compare_ether_addr(hdr->addr2, ieee->assoc_ap_addr)) {
 528                 /* Frame from BSSID of the AP for which we are a client */
 529                 skb->dev = dev = ieee->stadev;
 530                 stats = hostap_get_stats(dev);
 531                 from_assoc_ap = 1;
 532         }
 533 #endif
 534
 535         dev->last_rx = jiffies;
 536
 537 #ifdef NOT_YET
 538         if ((ieee->iw_mode == IW_MODE_MASTER ||
 539              ieee->iw_mode == IW_MODE_REPEAT) && !from_assoc_ap) {
 540                 switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats,
 541                                              wds != NULL)) {
 542                 case AP_RX_CONTINUE_NOT_AUTHORIZED:
 543                         frame_authorized = 0;
 544                         break;
 545                 case AP_RX_CONTINUE:
 546                         frame_authorized = 1;
 547                         break;
 548                 case AP_RX_DROP:
 549                         goto rx_dropped;
 550                 case AP_RX_EXIT:
 551                         goto rx_exit;
 552                 }
 553         }
 554 #endif
 555
 556         /* Nullfunc frames may have PS-bit set, so they must be passed to
 557          * hostap_handle_sta_rx() before being dropped here. */
 558
 559         stype &= ~IEEE80211_STYPE_QOS_DATA;
 560
 561         if (stype != IEEE80211_STYPE_DATA &&
 562             stype != IEEE80211_STYPE_DATA_CFACK &&
 563             stype != IEEE80211_STYPE_DATA_CFPOLL &&
 564             stype != IEEE80211_STYPE_DATA_CFACKPOLL) {
 565                 if (stype != IEEE80211_STYPE_NULLFUNC)
 566                         IEEE80211_DEBUG_DROP("RX: dropped data frame "
 567                                              "with no data (type=0x%02x, "
 568                                              "subtype=0x%02x, len=%d)\n",
 569                                              type, stype, skb->len);
 570                 goto rx_dropped;
 571         }
 572
 573         /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
 574
 575         if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
 576             (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0)
 577                 goto rx_dropped;
 578
 579         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 580
 581         /* skb: hdr + (possibly fragmented) plaintext payload */
 582         // PR: FIXME: hostap has additional conditions in the "if" below:
 583         // ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
 584         if ((frag != 0) || (fc & IEEE80211_FCTL_MOREFRAGS)) {
 585                 int flen;
 586                 struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr);
 587                 IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
 588
 589                 if (!frag_skb) {
 590                         IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG,
 591                                         "Rx cannot get skb from fragment "
 592                                         "cache (morefrag=%d seq=%u frag=%u)\n",
 593                                         (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
 594                                         WLAN_GET_SEQ_SEQ(sc), frag);
 595                         goto rx_dropped;
 596                 }
 597
 598                 flen = skb->len;
 599                 if (frag != 0)
 600                         flen -= hdrlen;
 601
 602                 if (frag_skb->tail + flen > frag_skb->end) {
 603                         printk(KERN_WARNING "%s: host decrypted and "
 604                                "reassembled frame did not fit skb\n",
 605                                dev->name);
 606                         ieee80211_frag_cache_invalidate(ieee, hdr);
 607                         goto rx_dropped;
 608                 }
 609
 610                 if (frag == 0) {
 611                         /* copy first fragment (including full headers) into
 612                          * beginning of the fragment cache skb */
 613                         skb_copy_from_linear_data(skb, skb_put(frag_skb, flen), flen);
 614                 } else {
 615                         /* append frame payload to the end of the fragment
 616                          * cache skb */
 617                         skb_copy_from_linear_data_offset(skb, hdrlen,
 618                                       skb_put(frag_skb, flen), flen);
 619                 }
 620                 dev_kfree_skb_any(skb);
 621                 skb = NULL;
 622
 623                 if (fc & IEEE80211_FCTL_MOREFRAGS) {
 624                         /* more fragments expected - leave the skb in fragment
 625                          * cache for now; it will be delivered to upper layers
 626                          * after all fragments have been received */
 627                         goto rx_exit;
 628                 }
 629
 630                 /* this was the last fragment and the frame will be
 631                  * delivered, so remove skb from fragment cache */
 632                 skb = frag_skb;
 633                 hdr = (struct ieee80211_hdr_4addr *)skb->data;
 634                 ieee80211_frag_cache_invalidate(ieee, hdr);
 635         }
 636
 637         /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
 638          * encrypted/authenticated */
 639         if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
 640             ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
 641                 goto rx_dropped;
 642
 643         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 644         if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep) {
 645                 if (            /*ieee->ieee802_1x && */
 646                            ieee80211_is_eapol_frame(ieee, skb)) {
 647                         /* pass unencrypted EAPOL frames even if encryption is
 648                          * configured */
 649                 } else {
 650                         IEEE80211_DEBUG_DROP("encryption configured, but RX "
 651                                              "frame not encrypted (SA=%pM)\n",
 652                                              hdr->addr2);
 653                         goto rx_dropped;
 654                 }
 655         }
 656
 657         if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep &&
 658             !ieee80211_is_eapol_frame(ieee, skb)) {
 659                 IEEE80211_DEBUG_DROP("dropped unencrypted RX data "
 660                                      "frame from %pM (drop_unencrypted=1)\n",
 661                                      hdr->addr2);
 662                 goto rx_dropped;
 663         }
 664
 665         /* If the frame was decrypted in hardware, we may need to strip off
 666          * any security data (IV, ICV, etc) that was left behind */
 667         if (!can_be_decrypted && (fc & IEEE80211_FCTL_PROTECTED) &&
 668             ieee->host_strip_iv_icv) {
 669                 int trimlen = 0;
 670
 671                 /* Top two-bits of byte 3 are the key index */
 672                 if (skb->len >= hdrlen + 3)
 673                         keyidx = skb->data[hdrlen + 3] >> 6;
 674
 675                 /* To strip off any security data which appears before the
 676                  * payload, we simply increase hdrlen (as the header gets
 677                  * chopped off immediately below). For the security data which
 678                  * appears after the payload, we use skb_trim. */
 679
 680                 switch (ieee->sec.encode_alg[keyidx]) {
 681                 case SEC_ALG_WEP:
 682                         /* 4 byte IV */
 683                         hdrlen += 4;
 684                         /* 4 byte ICV */
 685                         trimlen = 4;
 686                         break;
 687                 case SEC_ALG_TKIP:
 688                         /* 4 byte IV, 4 byte ExtIV */
 689                         hdrlen += 8;
 690                         /* 8 byte MIC, 4 byte ICV */
 691                         trimlen = 12;
 692                         break;
 693                 case SEC_ALG_CCMP:
 694                         /* 8 byte CCMP header */
 695                         hdrlen += 8;
 696                         /* 8 byte MIC */
 697                         trimlen = 8;
 698                         break;
 699                 }
 700
 701                 if (skb->len < trimlen)
 702                         goto rx_dropped;
 703
 704                 __skb_trim(skb, skb->len - trimlen);
 705
 706                 if (skb->len < hdrlen)
 707                         goto rx_dropped;
 708         }
 709
 710         /* skb: hdr + (possible reassembled) full plaintext payload */
 711
 712         payload = skb->data + hdrlen;
 713         ethertype = (payload[6] << 8) | payload[7];
 714
 715 #ifdef NOT_YET
 716         /* If IEEE 802.1X is used, check whether the port is authorized to send
 717          * the received frame. */
 718         if (ieee->ieee802_1x && ieee->iw_mode == IW_MODE_MASTER) {
 719                 if (ethertype == ETH_P_PAE) {
 720                         printk(KERN_DEBUG "%s: RX: IEEE 802.1X frame\n",
 721                                dev->name);
 722                         if (ieee->hostapd && ieee->apdev) {
 723                                 /* Send IEEE 802.1X frames to the user
 724                                  * space daemon for processing */
 725                                 prism2_rx_80211(ieee->apdev, skb, rx_stats,
 726                                                 PRISM2_RX_MGMT);
 727                                 ieee->apdevstats.rx_packets++;
 728                                 ieee->apdevstats.rx_bytes += skb->len;
 729                                 goto rx_exit;
 730                         }
 731                 } else if (!frame_authorized) {
 732                         printk(KERN_DEBUG "%s: dropped frame from "
 733                                "unauthorized port (IEEE 802.1X): "
 734                                "ethertype=0x%04x\n", dev->name, ethertype);
 735                         goto rx_dropped;
 736                 }
 737         }
 738 #endif
 739
 740         /* convert hdr + possible LLC headers into Ethernet header */
 741         if (skb->len - hdrlen >= 8 &&
 742             ((memcmp(payload, rfc1042_header, SNAP_SIZE) == 0 &&
 743               ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
 744              memcmp(payload, bridge_tunnel_header, SNAP_SIZE) == 0)) {
 745                 /* remove RFC1042 or Bridge-Tunnel encapsulation and
 746                  * replace EtherType */
 747                 skb_pull(skb, hdrlen + SNAP_SIZE);
 748                 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
 749                 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
 750         } else {
 751                 __be16 len;
 752                 /* Leave Ethernet header part of hdr and full payload */
 753                 skb_pull(skb, hdrlen);
 754                 len = htons(skb->len);
 755                 memcpy(skb_push(skb, 2), &len, 2);
 756                 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
 757                 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
 758         }
 759
 760 #ifdef NOT_YET
 761         if (wds && ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 762                     IEEE80211_FCTL_TODS) && skb->len >= ETH_HLEN + ETH_ALEN) {
 763                 /* Non-standard frame: get addr4 from its bogus location after
 764                  * the payload */
 765                 skb_copy_to_linear_data_offset(skb, ETH_ALEN,
 766                                                skb->data + skb->len - ETH_ALEN,
 767                                                ETH_ALEN);
 768                 skb_trim(skb, skb->len - ETH_ALEN);
 769         }
 770 #endif
 771
 772         stats->rx_packets++;
 773         stats->rx_bytes += skb->len;
 774
 775 #ifdef NOT_YET
 776         if (ieee->iw_mode == IW_MODE_MASTER && !wds && ieee->ap->bridge_packets) {
 777                 if (dst[0] & 0x01) {
 778                         /* copy multicast frame both to the higher layers and
 779                          * to the wireless media */
 780                         ieee->ap->bridged_multicast++;
 781                         skb2 = skb_clone(skb, GFP_ATOMIC);
 782                         if (skb2 == NULL)
 783                                 printk(KERN_DEBUG "%s: skb_clone failed for "
 784                                        "multicast frame\n", dev->name);
 785                 } else if (hostap_is_sta_assoc(ieee->ap, dst)) {
 786                         /* send frame directly to the associated STA using
 787                          * wireless media and not passing to higher layers */
 788                         ieee->ap->bridged_unicast++;
 789                         skb2 = skb;
 790                         skb = NULL;
 791                 }
 792         }
 793
 794         if (skb2 != NULL) {
 795                 /* send to wireless media */
 796                 skb2->dev = dev;
 797                 skb2->protocol = htons(ETH_P_802_3);
 798                 skb_reset_mac_header(skb2);
 799                 skb_reset_network_header(skb2);
 800                 /* skb2->network_header += ETH_HLEN; */
 801                 dev_queue_xmit(skb2);
 802         }
 803 #endif
 804
 805         if (skb) {
 806                 skb->protocol = eth_type_trans(skb, dev);
 807                 memset(skb->cb, 0, sizeof(skb->cb));
 808                 skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
 809                 if (netif_rx(skb) == NET_RX_DROP) {
 810                         /* netif_rx always succeeds, but it might drop
 811                          * the packet.  If it drops the packet, we log that
 812                          * in our stats. */
 813                         IEEE80211_DEBUG_DROP
 814                             ("RX: netif_rx dropped the packet\n");
 815                         stats->rx_dropped++;
 816                 }
 817         }
 818
 819       rx_exit:
 820 #ifdef NOT_YET
 821         if (sta)
 822                 hostap_handle_sta_release(sta);
 823 #endif
 824         return 1;
 825
 826       rx_dropped:
 827         stats->rx_dropped++;
 828
 829         /* Returning 0 indicates to caller that we have not handled the SKB--
 830          * so it is still allocated and can be used again by underlying
 831          * hardware as a DMA target */
 832         return 0;
 833 }
 834
 835 /* Filter out unrelated packets, call ieee80211_rx[_mgt]
 836  * This function takes over the skb, it should not be used again after calling
 837  * this function. */
 838 void ieee80211_rx_any(struct ieee80211_device *ieee,
 839                      struct sk_buff *skb, struct ieee80211_rx_stats *stats)
 840 {
 841         struct ieee80211_hdr_4addr *hdr;
 842         int is_packet_for_us;
 843         u16 fc;
 844
 845         if (ieee->iw_mode == IW_MODE_MONITOR) {
 846                 if (!ieee80211_rx(ieee, skb, stats))
 847                         dev_kfree_skb_irq(skb);
 848                 return;
 849         }
 850
 851         if (skb->len < sizeof(struct ieee80211_hdr))
 852                 goto drop_free;
 853
 854         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 855         fc = le16_to_cpu(hdr->frame_ctl);
 856
 857         if ((fc & IEEE80211_FCTL_VERS) != 0)
 858                 goto drop_free;
 859
 860         switch (fc & IEEE80211_FCTL_FTYPE) {
 861         case IEEE80211_FTYPE_MGMT:
 862                 if (skb->len < sizeof(struct ieee80211_hdr_3addr))
 863                         goto drop_free;
 864                 ieee80211_rx_mgt(ieee, hdr, stats);
 865                 dev_kfree_skb_irq(skb);
 866                 return;
 867         case IEEE80211_FTYPE_DATA:
 868                 break;
 869         case IEEE80211_FTYPE_CTL:
 870                 return;
 871         default:
 872                 return;
 873         }
 874
 875         is_packet_for_us = 0;
 876         switch (ieee->iw_mode) {
 877         case IW_MODE_ADHOC:
 878                 /* our BSS and not from/to DS */
 879                 if (memcmp(hdr->addr3, ieee->bssid, ETH_ALEN) == 0)
 880                 if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == 0) {
 881                         /* promisc: get all */
 882                         if (ieee->dev->flags & IFF_PROMISC)
 883                                 is_packet_for_us = 1;
 884                         /* to us */
 885                         else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0)
 886                                 is_packet_for_us = 1;
 887                         /* mcast */
 888                         else if (is_multicast_ether_addr(hdr->addr1))
 889                                 is_packet_for_us = 1;
 890                 }
 891                 break;
 892         case IW_MODE_INFRA:
 893                 /* our BSS (== from our AP) and from DS */
 894                 if (memcmp(hdr->addr2, ieee->bssid, ETH_ALEN) == 0)
 895                 if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS) {
 896                         /* promisc: get all */
 897                         if (ieee->dev->flags & IFF_PROMISC)
 898                                 is_packet_for_us = 1;
 899                         /* to us */
 900                         else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0)
 901                                 is_packet_for_us = 1;
 902                         /* mcast */
 903                         else if (is_multicast_ether_addr(hdr->addr1)) {
 904                                 /* not our own packet bcasted from AP */
 905                                 if (memcmp(hdr->addr3, ieee->dev->dev_addr, ETH_ALEN))
 906                                         is_packet_for_us = 1;
 907                         }
 908                 }
 909                 break;
 910         default:
 911                 /* ? */
 912                 break;
 913         }
 914
 915         if (is_packet_for_us)
 916                 if (!ieee80211_rx(ieee, skb, stats))
 917                         dev_kfree_skb_irq(skb);
 918         return;
 919
 920 drop_free:
 921         dev_kfree_skb_irq(skb);
 922         ieee->stats.rx_dropped++;
 923         return;
 924 }
 925
 926 #define MGMT_FRAME_FIXED_PART_LENGTH            0x24
 927
 928 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
 929
 930 /*
 931 * Make ther structure we read from the beacon packet has
 932 * the right values
 933 */
 934 static int ieee80211_verify_qos_info(struct ieee80211_qos_information_element
 935                                      *info_element, int sub_type)
 936 {
 937
 938         if (info_element->qui_subtype != sub_type)
 939                 return -1;
 940         if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
 941                 return -1;
 942         if (info_element->qui_type != QOS_OUI_TYPE)
 943                 return -1;
 944         if (info_element->version != QOS_VERSION_1)
 945                 return -1;
 946
 947         return 0;
 948 }
 949
 950 /*
 951  * Parse a QoS parameter element
 952  */
 953 static int ieee80211_read_qos_param_element(struct ieee80211_qos_parameter_info
 954                                             *element_param, struct ieee80211_info_element
 955                                             *info_element)
 956 {
 957         int ret = 0;
 958         u16 size = sizeof(struct ieee80211_qos_parameter_info) - 2;
 959
 960         if ((info_element == NULL) || (element_param == NULL))
 961                 return -1;
 962
 963         if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
 964                 memcpy(element_param->info_element.qui, info_element->data,
 965                        info_element->len);
 966                 element_param->info_element.elementID = info_element->id;
 967                 element_param->info_element.length = info_element->len;
 968         } else
 969                 ret = -1;
 970         if (ret == 0)
 971                 ret = ieee80211_verify_qos_info(&element_param->info_element,
 972                                                 QOS_OUI_PARAM_SUB_TYPE);
 973         return ret;
 974 }
 975
 976 /*
 977  * Parse a QoS information element
 978  */
 979 static int ieee80211_read_qos_info_element(struct
 980                                            ieee80211_qos_information_element
 981                                            *element_info, struct ieee80211_info_element
 982                                            *info_element)
 983 {
 984         int ret = 0;
 985         u16 size = sizeof(struct ieee80211_qos_information_element) - 2;
 986
 987         if (element_info == NULL)
 988                 return -1;
 989         if (info_element == NULL)
 990                 return -1;
 991
 992         if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
 993                 memcpy(element_info->qui, info_element->data,
 994                        info_element->len);
 995                 element_info->elementID = info_element->id;
 996                 element_info->length = info_element->len;
 997         } else
 998                 ret = -1;
 999
1000         if (ret == 0)
1001                 ret = ieee80211_verify_qos_info(element_info,
1002                                                 QOS_OUI_INFO_SUB_TYPE);
1003         return ret;
1004 }
1005
1006 /*
1007  * Write QoS parameters from the ac parameters.
1008  */
1009 static int ieee80211_qos_convert_ac_to_parameters(struct
1010                                                   ieee80211_qos_parameter_info
1011                                                   *param_elm, struct
1012                                                   ieee80211_qos_parameters
1013                                                   *qos_param)
1014 {
1015         int rc = 0;
1016         int i;
1017         struct ieee80211_qos_ac_parameter *ac_params;
1018         u32 txop;
1019         u8 cw_min;
1020         u8 cw_max;
1021
1022         for (i = 0; i < QOS_QUEUE_NUM; i++) {
1023                 ac_params = &(param_elm->ac_params_record[i]);
1024
1025                 qos_param->aifs[i] = (ac_params->aci_aifsn) & 0x0F;
1026                 qos_param->aifs[i] -= (qos_param->aifs[i] < 2) ? 0 : 2;
1027
1028                 cw_min = ac_params->ecw_min_max & 0x0F;
1029                 qos_param->cw_min[i] = cpu_to_le16((1 << cw_min) - 1);
1030
1031                 cw_max = (ac_params->ecw_min_max & 0xF0) >> 4;
1032                 qos_param->cw_max[i] = cpu_to_le16((1 << cw_max) - 1);
1033
1034                 qos_param->flag[i] =
1035                     (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1036
1037                 txop = le16_to_cpu(ac_params->tx_op_limit) * 32;
1038                 qos_param->tx_op_limit[i] = cpu_to_le16(txop);
1039         }
1040         return rc;
1041 }
1042
1043 /*
1044  * we have a generic data element which it may contain QoS information or
1045  * parameters element. check the information element length to decide
1046  * which type to read
1047  */
1048 static int ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element
1049                                              *info_element,
1050                                              struct ieee80211_network *network)
1051 {
1052         int rc = 0;
1053         struct ieee80211_qos_parameters *qos_param = NULL;
1054         struct ieee80211_qos_information_element qos_info_element;
1055
1056         rc = ieee80211_read_qos_info_element(&qos_info_element, info_element);
1057
1058         if (rc == 0) {
1059                 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1060                 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1061         } else {
1062                 struct ieee80211_qos_parameter_info param_element;
1063
1064                 rc = ieee80211_read_qos_param_element(&param_element,
1065                                                       info_element);
1066                 if (rc == 0) {
1067                         qos_param = &(network->qos_data.parameters);
1068                         ieee80211_qos_convert_ac_to_parameters(&param_element,
1069                                                                qos_param);
1070                         network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1071                         network->qos_data.param_count =
1072                             param_element.info_element.ac_info & 0x0F;
1073                 }
1074         }
1075
1076         if (rc == 0) {
1077                 IEEE80211_DEBUG_QOS("QoS is supported\n");
1078                 network->qos_data.supported = 1;
1079         }
1080         return rc;
1081 }
1082
1083 #ifdef CONFIG_IEEE80211_DEBUG
1084 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
1085
1086 static const char *get_info_element_string(u16 id)
1087 {
1088         switch (id) {
1089                 MFIE_STRING(SSID);
1090                 MFIE_STRING(RATES);
1091                 MFIE_STRING(FH_SET);
1092                 MFIE_STRING(DS_SET);
1093                 MFIE_STRING(CF_SET);
1094                 MFIE_STRING(TIM);
1095                 MFIE_STRING(IBSS_SET);
1096                 MFIE_STRING(COUNTRY);
1097                 MFIE_STRING(HOP_PARAMS);
1098                 MFIE_STRING(HOP_TABLE);
1099                 MFIE_STRING(REQUEST);
1100                 MFIE_STRING(CHALLENGE);
1101                 MFIE_STRING(POWER_CONSTRAINT);
1102                 MFIE_STRING(POWER_CAPABILITY);
1103                 MFIE_STRING(TPC_REQUEST);
1104                 MFIE_STRING(TPC_REPORT);
1105                 MFIE_STRING(SUPP_CHANNELS);
1106                 MFIE_STRING(CSA);
1107                 MFIE_STRING(MEASURE_REQUEST);
1108                 MFIE_STRING(MEASURE_REPORT);
1109                 MFIE_STRING(QUIET);
1110                 MFIE_STRING(IBSS_DFS);
1111                 MFIE_STRING(ERP_INFO);
1112                 MFIE_STRING(RSN);
1113                 MFIE_STRING(RATES_EX);
1114                 MFIE_STRING(GENERIC);
1115                 MFIE_STRING(QOS_PARAMETER);
1116         default:
1117                 return "UNKNOWN";
1118         }
1119 }
1120 #endif
1121
1122 static int ieee80211_parse_info_param(struct ieee80211_info_element
1123                                       *info_element, u16 length,
1124                                       struct ieee80211_network *network)
1125 {
1126         u8 i;
1127 #ifdef CONFIG_IEEE80211_DEBUG
1128         char rates_str[64];
1129         char *p;
1130 #endif
1131
1132         while (length >= sizeof(*info_element)) {
1133                 if (sizeof(*info_element) + info_element->len > length) {
1134                         IEEE80211_DEBUG_MGMT("Info elem: parse failed: "
1135                                              "info_element->len + 2 > left : "
1136                                              "info_element->len+2=%zd left=%d, id=%d.\n",
1137                                              info_element->len +
1138                                              sizeof(*info_element),
1139                                              length, info_element->id);
1140                         /* We stop processing but don't return an error here
1141                          * because some misbehaviour APs break this rule. ie.
1142                          * Orinoco AP1000. */
1143                         break;
1144                 }
1145
1146                 switch (info_element->id) {
1147                 case MFIE_TYPE_SSID:
1148                         if (ieee80211_is_empty_essid(info_element->data,
1149                                                      info_element->len)) {
1150                                 network->flags |= NETWORK_EMPTY_ESSID;
1151                                 break;
1152                         }
1153
1154                         network->ssid_len = min(info_element->len,
1155                                                 (u8) IW_ESSID_MAX_SIZE);
1156                         memcpy(network->ssid, info_element->data,
1157                                network->ssid_len);
1158                         if (network->ssid_len < IW_ESSID_MAX_SIZE)
1159                                 memset(network->ssid + network->ssid_len, 0,
1160                                        IW_ESSID_MAX_SIZE - network->ssid_len);
1161
1162                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
1163                                              network->ssid, network->ssid_len);
1164                         break;
1165
1166                 case MFIE_TYPE_RATES:
1167 #ifdef CONFIG_IEEE80211_DEBUG
1168                         p = rates_str;
1169 #endif
1170                         network->rates_len = min(info_element->len,
1171                                                  MAX_RATES_LENGTH);
1172                         for (i = 0; i < network->rates_len; i++) {
1173                                 network->rates[i] = info_element->data[i];
1174 #ifdef CONFIG_IEEE80211_DEBUG
1175                                 p += snprintf(p, sizeof(rates_str) -
1176                                               (p - rates_str), "%02X ",
1177                                               network->rates[i]);
1178 #endif
1179                                 if (ieee80211_is_ofdm_rate
1180                                     (info_element->data[i])) {
1181                                         network->flags |= NETWORK_HAS_OFDM;
1182                                         if (info_element->data[i] &
1183                                             IEEE80211_BASIC_RATE_MASK)
1184                                                 network->flags &=
1185                                                     ~NETWORK_HAS_CCK;
1186                                 }
1187                         }
1188
1189                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
1190                                              rates_str, network->rates_len);
1191                         break;
1192
1193                 case MFIE_TYPE_RATES_EX:
1194 #ifdef CONFIG_IEEE80211_DEBUG
1195                         p = rates_str;
1196 #endif
1197                         network->rates_ex_len = min(info_element->len,
1198                                                     MAX_RATES_EX_LENGTH);
1199                         for (i = 0; i < network->rates_ex_len; i++) {
1200                                 network->rates_ex[i] = info_element->data[i];
1201 #ifdef CONFIG_IEEE80211_DEBUG
1202                                 p += snprintf(p, sizeof(rates_str) -
1203                                               (p - rates_str), "%02X ",
1204                                               network->rates[i]);
1205 #endif
1206                                 if (ieee80211_is_ofdm_rate
1207                                     (info_element->data[i])) {
1208                                         network->flags |= NETWORK_HAS_OFDM;
1209                                         if (info_element->data[i] &
1210                                             IEEE80211_BASIC_RATE_MASK)
1211                                                 network->flags &=
1212                                                     ~NETWORK_HAS_CCK;
1213                                 }
1214                         }
1215
1216                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1217                                              rates_str, network->rates_ex_len);
1218                         break;
1219
1220                 case MFIE_TYPE_DS_SET:
1221                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
1222                                              info_element->data[0]);
1223                         network->channel = info_element->data[0];
1224                         break;
1225
1226                 case MFIE_TYPE_FH_SET:
1227                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
1228                         break;
1229
1230                 case MFIE_TYPE_CF_SET:
1231                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
1232                         break;
1233
1234                 case MFIE_TYPE_TIM:
1235                         network->tim.tim_count = info_element->data[0];
1236                         network->tim.tim_period = info_element->data[1];
1237                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_TIM: partially ignored\n");
1238                         break;
1239
1240                 case MFIE_TYPE_ERP_INFO:
1241                         network->erp_value = info_element->data[0];
1242                         network->flags |= NETWORK_HAS_ERP_VALUE;
1243                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1244                                              network->erp_value);
1245                         break;
1246
1247                 case MFIE_TYPE_IBSS_SET:
1248                         network->atim_window = info_element->data[0];
1249                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
1250                                              network->atim_window);
1251                         break;
1252
1253                 case MFIE_TYPE_CHALLENGE:
1254                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
1255                         break;
1256
1257                 case MFIE_TYPE_GENERIC:
1258                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
1259                                              info_element->len);
1260                         if (!ieee80211_parse_qos_info_param_IE(info_element,
1261                                                                network))
1262                                 break;
1263
1264                         if (info_element->len >= 4 &&
1265                             info_element->data[0] == 0x00 &&
1266                             info_element->data[1] == 0x50 &&
1267                             info_element->data[2] == 0xf2 &&
1268                             info_element->data[3] == 0x01) {
1269                                 network->wpa_ie_len = min(info_element->len + 2,
1270                                                           MAX_WPA_IE_LEN);
1271                                 memcpy(network->wpa_ie, info_element,
1272                                        network->wpa_ie_len);
1273                         }
1274                         break;
1275
1276                 case MFIE_TYPE_RSN:
1277                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
1278                                              info_element->len);
1279                         network->rsn_ie_len = min(info_element->len + 2,
1280                                                   MAX_WPA_IE_LEN);
1281                         memcpy(network->rsn_ie, info_element,
1282                                network->rsn_ie_len);
1283                         break;
1284
1285                 case MFIE_TYPE_QOS_PARAMETER:
1286                         printk(KERN_ERR
1287                                "QoS Error need to parse QOS_PARAMETER IE\n");
1288                         break;
1289                         /* 802.11h */
1290                 case MFIE_TYPE_POWER_CONSTRAINT:
1291                         network->power_constraint = info_element->data[0];
1292                         network->flags |= NETWORK_HAS_POWER_CONSTRAINT;
1293                         break;
1294
1295                 case MFIE_TYPE_CSA:
1296                         network->power_constraint = info_element->data[0];
1297                         network->flags |= NETWORK_HAS_CSA;
1298                         break;
1299
1300                 case MFIE_TYPE_QUIET:
1301                         network->quiet.count = info_element->data[0];
1302                         network->quiet.period = info_element->data[1];
1303                         network->quiet.duration = info_element->data[2];
1304                         network->quiet.offset = info_element->data[3];
1305                         network->flags |= NETWORK_HAS_QUIET;
1306                         break;
1307
1308                 case MFIE_TYPE_IBSS_DFS:
1309                         if (network->ibss_dfs)
1310                                 break;
1311                         network->ibss_dfs = kmemdup(info_element->data,
1312                                                     info_element->len,
1313                                                     GFP_ATOMIC);
1314                         if (!network->ibss_dfs)
1315                                 return 1;
1316                         network->flags |= NETWORK_HAS_IBSS_DFS;
1317                         break;
1318
1319                 case MFIE_TYPE_TPC_REPORT:
1320                         network->tpc_report.transmit_power =
1321                             info_element->data[0];
1322                         network->tpc_report.link_margin = info_element->data[1];
1323                         network->flags |= NETWORK_HAS_TPC_REPORT;
1324                         break;
1325
1326                 default:
1327                         IEEE80211_DEBUG_MGMT
1328                             ("Unsupported info element: %s (%d)\n",
1329                              get_info_element_string(info_element->id),
1330                              info_element->id);
1331                         break;
1332                 }
1333
1334                 length -= sizeof(*info_element) + info_element->len;
1335                 info_element =
1336                     (struct ieee80211_info_element *)&info_element->
1337                     data[info_element->len];
1338         }
1339
1340         return 0;
1341 }
1342
1343 static int ieee80211_handle_assoc_resp(struct ieee80211_device *ieee, struct ieee80211_assoc_response
1344                                        *frame, struct ieee80211_rx_stats *stats)
1345 {
1346         struct ieee80211_network network_resp = {
1347                 .ibss_dfs = NULL,
1348         };
1349         struct ieee80211_network *network = &network_resp;
1350         struct net_device *dev = ieee->dev;
1351
1352         network->flags = 0;
1353         network->qos_data.active = 0;
1354         network->qos_data.supported = 0;
1355         network->qos_data.param_count = 0;
1356         network->qos_data.old_param_count = 0;
1357
1358         //network->atim_window = le16_to_cpu(frame->aid) & (0x3FFF);
1359         network->atim_window = le16_to_cpu(frame->aid);
1360         network->listen_interval = le16_to_cpu(frame->status);
1361         memcpy(network->bssid, frame->header.addr3, ETH_ALEN);
1362         network->capability = le16_to_cpu(frame->capability);
1363         network->last_scanned = jiffies;
1364         network->rates_len = network->rates_ex_len = 0;
1365         network->last_associate = 0;
1366         network->ssid_len = 0;
1367         network->erp_value =
1368             (network->capability & WLAN_CAPABILITY_IBSS) ? 0x3 : 0x0;
1369
1370         if (stats->freq == IEEE80211_52GHZ_BAND) {
1371                 /* for A band (No DS info) */
1372                 network->channel = stats->received_channel;
1373         } else
1374                 network->flags |= NETWORK_HAS_CCK;
1375
1376         network->wpa_ie_len = 0;
1377         network->rsn_ie_len = 0;
1378
1379         if (ieee80211_parse_info_param
1380             (frame->info_element, stats->len - sizeof(*frame), network))
1381                 return 1;
1382
1383         network->mode = 0;
1384         if (stats->freq == IEEE80211_52GHZ_BAND)
1385                 network->mode = IEEE_A;
1386         else {
1387                 if (network->flags & NETWORK_HAS_OFDM)
1388                         network->mode |= IEEE_G;
1389                 if (network->flags & NETWORK_HAS_CCK)
1390                         network->mode |= IEEE_B;
1391         }
1392
1393         if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
1394                 network->flags |= NETWORK_EMPTY_ESSID;
1395
1396         memcpy(&network->stats, stats, sizeof(network->stats));
1397
1398         if (ieee->handle_assoc_response != NULL)
1399                 ieee->handle_assoc_response(dev, frame, network);
1400
1401         return 0;
1402 }
1403
1404 /***************************************************/
1405
1406 static int ieee80211_network_init(struct ieee80211_device *ieee, struct ieee80211_probe_response
1407                                          *beacon,
1408                                          struct ieee80211_network *network,
1409                                          struct ieee80211_rx_stats *stats)
1410 {
1411         network->qos_data.active = 0;
1412         network->qos_data.supported = 0;
1413         network->qos_data.param_count = 0;
1414         network->qos_data.old_param_count = 0;
1415
1416         /* Pull out fixed field data */
1417         memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
1418         network->capability = le16_to_cpu(beacon->capability);
1419         network->last_scanned = jiffies;
1420         network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
1421         network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
1422         network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
1423         /* Where to pull this? beacon->listen_interval; */
1424         network->listen_interval = 0x0A;
1425         network->rates_len = network->rates_ex_len = 0;
1426         network->last_associate = 0;
1427         network->ssid_len = 0;
1428         network->flags = 0;
1429         network->atim_window = 0;
1430         network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
1431             0x3 : 0x0;
1432
1433         if (stats->freq == IEEE80211_52GHZ_BAND) {
1434                 /* for A band (No DS info) */
1435                 network->channel = stats->received_channel;
1436         } else
1437                 network->flags |= NETWORK_HAS_CCK;
1438
1439         network->wpa_ie_len = 0;
1440         network->rsn_ie_len = 0;
1441
1442         if (ieee80211_parse_info_param
1443             (beacon->info_element, stats->len - sizeof(*beacon), network))
1444                 return 1;
1445
1446         network->mode = 0;
1447         if (stats->freq == IEEE80211_52GHZ_BAND)
1448                 network->mode = IEEE_A;
1449         else {
1450                 if (network->flags & NETWORK_HAS_OFDM)
1451                         network->mode |= IEEE_G;
1452                 if (network->flags & NETWORK_HAS_CCK)
1453                         network->mode |= IEEE_B;
1454         }
1455
1456         if (network->mode == 0) {
1457                 IEEE80211_DEBUG_SCAN("Filtered out '%s (%pM)' "
1458                                      "network.\n",
1459                                      escape_essid(network->ssid,
1460                                                   network->ssid_len),
1461                                      network->bssid);
1462                 return 1;
1463         }
1464
1465         if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
1466                 network->flags |= NETWORK_EMPTY_ESSID;
1467
1468         memcpy(&network->stats, stats, sizeof(network->stats));
1469
1470         return 0;
1471 }
1472
1473 static inline int is_same_network(struct ieee80211_network *src,
1474                                   struct ieee80211_network *dst)
1475 {
1476         /* A network is only a duplicate if the channel, BSSID, and ESSID
1477          * all match.  We treat all <hidden> with the same BSSID and channel
1478          * as one network */
1479         return ((src->ssid_len == dst->ssid_len) &&
1480                 (src->channel == dst->channel) &&
1481                 !compare_ether_addr(src->bssid, dst->bssid) &&
1482                 !memcmp(src->ssid, dst->ssid, src->ssid_len));
1483 }
1484
1485 static void update_network(struct ieee80211_network *dst,
1486                                   struct ieee80211_network *src)
1487 {
1488         int qos_active;
1489         u8 old_param;
1490
1491         ieee80211_network_reset(dst);
1492         dst->ibss_dfs = src->ibss_dfs;
1493
1494         /* We only update the statistics if they were created by receiving
1495          * the network information on the actual channel the network is on.
1496          *
1497          * This keeps beacons received on neighbor channels from bringing
1498          * down the signal level of an AP. */
1499         if (dst->channel == src->stats.received_channel)
1500                 memcpy(&dst->stats, &src->stats,
1501                        sizeof(struct ieee80211_rx_stats));
1502         else
1503                 IEEE80211_DEBUG_SCAN("Network %pM info received "
1504                         "off channel (%d vs. %d)\n", src->bssid,
1505                         dst->channel, src->stats.received_channel);
1506
1507         dst->capability = src->capability;
1508         memcpy(dst->rates, src->rates, src->rates_len);
1509         dst->rates_len = src->rates_len;
1510         memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
1511         dst->rates_ex_len = src->rates_ex_len;
1512
1513         dst->mode = src->mode;
1514         dst->flags = src->flags;
1515         dst->time_stamp[0] = src->time_stamp[0];
1516         dst->time_stamp[1] = src->time_stamp[1];
1517
1518         dst->beacon_interval = src->beacon_interval;
1519         dst->listen_interval = src->listen_interval;
1520         dst->atim_window = src->atim_window;
1521         dst->erp_value = src->erp_value;
1522         dst->tim = src->tim;
1523
1524         memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
1525         dst->wpa_ie_len = src->wpa_ie_len;
1526         memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
1527         dst->rsn_ie_len = src->rsn_ie_len;
1528
1529         dst->last_scanned = jiffies;
1530         qos_active = src->qos_data.active;
1531         old_param = dst->qos_data.old_param_count;
1532         if (dst->flags & NETWORK_HAS_QOS_MASK)
1533                 memcpy(&dst->qos_data, &src->qos_data,
1534                        sizeof(struct ieee80211_qos_data));
1535         else {
1536                 dst->qos_data.supported = src->qos_data.supported;
1537                 dst->qos_data.param_count = src->qos_data.param_count;
1538         }
1539
1540         if (dst->qos_data.supported == 1) {
1541                 if (dst->ssid_len)
1542                         IEEE80211_DEBUG_QOS
1543                             ("QoS the network %s is QoS supported\n",
1544                              dst->ssid);
1545                 else
1546                         IEEE80211_DEBUG_QOS
1547                             ("QoS the network is QoS supported\n");
1548         }
1549         dst->qos_data.active = qos_active;
1550         dst->qos_data.old_param_count = old_param;
1551
1552         /* dst->last_associate is not overwritten */
1553 }
1554
1555 static inline int is_beacon(__le16 fc)
1556 {
1557         return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON);
1558 }
1559
1560 static void ieee80211_process_probe_response(struct ieee80211_device
1561                                                     *ieee, struct
1562                                                     ieee80211_probe_response
1563                                                     *beacon, struct ieee80211_rx_stats
1564                                                     *stats)
1565 {
1566         struct net_device *dev = ieee->dev;
1567         struct ieee80211_network network = {
1568                 .ibss_dfs = NULL,
1569         };
1570         struct ieee80211_network *target;
1571         struct ieee80211_network *oldest = NULL;
1572 #ifdef CONFIG_IEEE80211_DEBUG
1573         struct ieee80211_info_element *info_element = beacon->info_element;
1574 #endif
1575         unsigned long flags;
1576
1577         IEEE80211_DEBUG_SCAN("'%s' (%pM"
1578                      "): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
1579                      escape_essid(info_element->data, info_element->len),
1580                      beacon->header.addr3,
1581                      (beacon->capability & cpu_to_le16(1 << 0xf)) ? '1' : '0',
1582                      (beacon->capability & cpu_to_le16(1 << 0xe)) ? '1' : '0',
1583                      (beacon->capability & cpu_to_le16(1 << 0xd)) ? '1' : '0',
1584                      (beacon->capability & cpu_to_le16(1 << 0xc)) ? '1' : '0',
1585                      (beacon->capability & cpu_to_le16(1 << 0xb)) ? '1' : '0',
1586                      (beacon->capability & cpu_to_le16(1 << 0xa)) ? '1' : '0',
1587                      (beacon->capability & cpu_to_le16(1 << 0x9)) ? '1' : '0',
1588                      (beacon->capability & cpu_to_le16(1 << 0x8)) ? '1' : '0',
1589                      (beacon->capability & cpu_to_le16(1 << 0x7)) ? '1' : '0',
1590                      (beacon->capability & cpu_to_le16(1 << 0x6)) ? '1' : '0',
1591                      (beacon->capability & cpu_to_le16(1 << 0x5)) ? '1' : '0',
1592                      (beacon->capability & cpu_to_le16(1 << 0x4)) ? '1' : '0',
1593                      (beacon->capability & cpu_to_le16(1 << 0x3)) ? '1' : '0',
1594                      (beacon->capability & cpu_to_le16(1 << 0x2)) ? '1' : '0',
1595                      (beacon->capability & cpu_to_le16(1 << 0x1)) ? '1' : '0',
1596                      (beacon->capability & cpu_to_le16(1 << 0x0)) ? '1' : '0');
1597
1598         if (ieee80211_network_init(ieee, beacon, &network, stats)) {
1599                 IEEE80211_DEBUG_SCAN("Dropped '%s' (%pM) via %s.\n",
1600                                      escape_essid(info_element->data,
1601                                                   info_element->len),
1602                                      beacon->header.addr3,
1603                                      is_beacon(beacon->header.frame_ctl) ?
1604                                      "BEACON" : "PROBE RESPONSE");
1605                 return;
1606         }
1607
1608         /* The network parsed correctly -- so now we scan our known networks
1609          * to see if we can find it in our list.
1610          *
1611          * NOTE:  This search is definitely not optimized.  Once its doing
1612          *        the "right thing" we'll optimize it for efficiency if
1613          *        necessary */
1614
1615         /* Search for this entry in the list and update it if it is
1616          * already there. */
1617
1618         spin_lock_irqsave(&ieee->lock, flags);
1619
1620         list_for_each_entry(target, &ieee->network_list, list) {
1621                 if (is_same_network(target, &network))
1622                         break;
1623
1624                 if ((oldest == NULL) ||
1625                     (target->last_scanned < oldest->last_scanned))
1626                         oldest = target;
1627         }
1628
1629         /* If we didn't find a match, then get a new network slot to initialize
1630          * with this beacon's information */
1631         if (&target->list == &ieee->network_list) {
1632                 if (list_empty(&ieee->network_free_list)) {
1633                         /* If there are no more slots, expire the oldest */
1634                         list_del(&oldest->list);
1635                         target = oldest;
1636                         IEEE80211_DEBUG_SCAN("Expired '%s' (%pM) from "
1637                                              "network list.\n",
1638                                              escape_essid(target->ssid,
1639                                                           target->ssid_len),
1640                                              target->bssid);
1641                         ieee80211_network_reset(target);
1642                 } else {
1643                         /* Otherwise just pull from the free list */
1644                         target = list_entry(ieee->network_free_list.next,
1645                                             struct ieee80211_network, list);
1646                         list_del(ieee->network_free_list.next);
1647                 }
1648
1649 #ifdef CONFIG_IEEE80211_DEBUG
1650                 IEEE80211_DEBUG_SCAN("Adding '%s' (%pM) via %s.\n",
1651                                      escape_essid(network.ssid,
1652                                                   network.ssid_len),
1653                                      network.bssid,
1654                                      is_beacon(beacon->header.frame_ctl) ?
1655                                      "BEACON" : "PROBE RESPONSE");
1656 #endif
1657                 memcpy(target, &network, sizeof(*target));
1658                 network.ibss_dfs = NULL;
1659                 list_add_tail(&target->list, &ieee->network_list);
1660         } else {
1661                 IEEE80211_DEBUG_SCAN("Updating '%s' (%pM) via %s.\n",
1662                                      escape_essid(target->ssid,
1663                                                   target->ssid_len),
1664                                      target->bssid,
1665                                      is_beacon(beacon->header.frame_ctl) ?
1666                                      "BEACON" : "PROBE RESPONSE");
1667                 update_network(target, &network);
1668                 network.ibss_dfs = NULL;
1669         }
1670
1671         spin_unlock_irqrestore(&ieee->lock, flags);
1672
1673         if (is_beacon(beacon->header.frame_ctl)) {
1674                 if (ieee->handle_beacon != NULL)
1675                         ieee->handle_beacon(dev, beacon, target);
1676         } else {
1677                 if (ieee->handle_probe_response != NULL)
1678                         ieee->handle_probe_response(dev, beacon, target);
1679         }
1680 }
1681
1682 void ieee80211_rx_mgt(struct ieee80211_device *ieee,
1683                       struct ieee80211_hdr_4addr *header,
1684                       struct ieee80211_rx_stats *stats)
1685 {
1686         switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
1687         case IEEE80211_STYPE_ASSOC_RESP:
1688                 IEEE80211_DEBUG_MGMT("received ASSOCIATION RESPONSE (%d)\n",
1689                                      WLAN_FC_GET_STYPE(le16_to_cpu
1690                                                        (header->frame_ctl)));
1691                 ieee80211_handle_assoc_resp(ieee,
1692                                             (struct ieee80211_assoc_response *)
1693                                             header, stats);
1694                 break;
1695
1696         case IEEE80211_STYPE_REASSOC_RESP:
1697                 IEEE80211_DEBUG_MGMT("received REASSOCIATION RESPONSE (%d)\n",
1698                                      WLAN_FC_GET_STYPE(le16_to_cpu
1699                                                        (header->frame_ctl)));
1700                 break;
1701
1702         case IEEE80211_STYPE_PROBE_REQ:
1703                 IEEE80211_DEBUG_MGMT("received auth (%d)\n",
1704                                      WLAN_FC_GET_STYPE(le16_to_cpu
1705                                                        (header->frame_ctl)));
1706
1707                 if (ieee->handle_probe_request != NULL)
1708                         ieee->handle_probe_request(ieee->dev,
1709                                                    (struct
1710                                                     ieee80211_probe_request *)
1711                                                    header, stats);
1712                 break;
1713
1714         case IEEE80211_STYPE_PROBE_RESP:
1715                 IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
1716                                      WLAN_FC_GET_STYPE(le16_to_cpu
1717                                                        (header->frame_ctl)));
1718                 IEEE80211_DEBUG_SCAN("Probe response\n");
1719                 ieee80211_process_probe_response(ieee,
1720                                                  (struct
1721                                                   ieee80211_probe_response *)
1722                                                  header, stats);
1723                 break;
1724
1725         case IEEE80211_STYPE_BEACON:
1726                 IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
1727                                      WLAN_FC_GET_STYPE(le16_to_cpu
1728                                                        (header->frame_ctl)));
1729                 IEEE80211_DEBUG_SCAN("Beacon\n");
1730                 ieee80211_process_probe_response(ieee,
1731                                                  (struct
1732                                                   ieee80211_probe_response *)
1733                                                  header, stats);
1734                 break;
1735         case IEEE80211_STYPE_AUTH:
1736
1737                 IEEE80211_DEBUG_MGMT("received auth (%d)\n",
1738                                      WLAN_FC_GET_STYPE(le16_to_cpu
1739                                                        (header->frame_ctl)));
1740
1741                 if (ieee->handle_auth != NULL)
1742                         ieee->handle_auth(ieee->dev,
1743                                           (struct ieee80211_auth *)header);
1744                 break;
1745
1746         case IEEE80211_STYPE_DISASSOC:
1747                 if (ieee->handle_disassoc != NULL)
1748                         ieee->handle_disassoc(ieee->dev,
1749                                               (struct ieee80211_disassoc *)
1750                                               header);
1751                 break;
1752
1753         case IEEE80211_STYPE_ACTION:
1754                 IEEE80211_DEBUG_MGMT("ACTION\n");
1755                 if (ieee->handle_action)
1756                         ieee->handle_action(ieee->dev,
1757                                             (struct ieee80211_action *)
1758                                             header, stats);
1759                 break;
1760
1761         case IEEE80211_STYPE_REASSOC_REQ:
1762                 IEEE80211_DEBUG_MGMT("received reassoc (%d)\n",
1763                                      WLAN_FC_GET_STYPE(le16_to_cpu
1764                                                        (header->frame_ctl)));
1765
1766                 IEEE80211_DEBUG_MGMT("%s: IEEE80211_REASSOC_REQ received\n",
1767                                      ieee->dev->name);
1768                 if (ieee->handle_reassoc_request != NULL)
1769                         ieee->handle_reassoc_request(ieee->dev,
1770                                                     (struct ieee80211_reassoc_request *)
1771                                                      header);
1772                 break;
1773
1774         case IEEE80211_STYPE_ASSOC_REQ:
1775                 IEEE80211_DEBUG_MGMT("received assoc (%d)\n",
1776                                      WLAN_FC_GET_STYPE(le16_to_cpu
1777                                                        (header->frame_ctl)));
1778
1779                 IEEE80211_DEBUG_MGMT("%s: IEEE80211_ASSOC_REQ received\n",
1780                                      ieee->dev->name);
1781                 if (ieee->handle_assoc_request != NULL)
1782                         ieee->handle_assoc_request(ieee->dev);
1783                 break;
1784
1785         case IEEE80211_STYPE_DEAUTH:
1786                 IEEE80211_DEBUG_MGMT("DEAUTH\n");
1787                 if (ieee->handle_deauth != NULL)
1788                         ieee->handle_deauth(ieee->dev,
1789                                             (struct ieee80211_deauth *)
1790                                             header);
1791                 break;
1792         default:
1793                 IEEE80211_DEBUG_MGMT("received UNKNOWN (%d)\n",
1794                                      WLAN_FC_GET_STYPE(le16_to_cpu
1795                                                        (header->frame_ctl)));
1796                 IEEE80211_DEBUG_MGMT("%s: Unknown management packet: %d\n",
1797                                      ieee->dev->name,
1798                                      WLAN_FC_GET_STYPE(le16_to_cpu
1799                                                        (header->frame_ctl)));
1800                 break;
1801         }
1802 }
1803
1804 EXPORT_SYMBOL_GPL(ieee80211_rx_any);
1805 EXPORT_SYMBOL(ieee80211_rx_mgt);
1806 EXPORT_SYMBOL(ieee80211_rx);