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         DECLARE_MAC_BUF(mac);
 275
 276         if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
 277                 return 0;
 278
 279         hdr = (struct ieee80211_hdr_3addr *)skb->data;
 280         hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 281
 282         atomic_inc(&crypt->refcnt);
 283         res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
 284         atomic_dec(&crypt->refcnt);
 285         if (res < 0) {
 286                 IEEE80211_DEBUG_DROP("decryption failed (SA=%s"
 287                                      ") res=%d\n", print_mac(mac, hdr->addr2), res);
 288                 if (res == -2)
 289                         IEEE80211_DEBUG_DROP("Decryption failed ICV "
 290                                              "mismatch (key %d)\n",
 291                                              skb->data[hdrlen + 3] >> 6);
 292                 ieee->ieee_stats.rx_discards_undecryptable++;
 293                 return -1;
 294         }
 295
 296         return res;
 297 }
 298
 299 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
 300 static int
 301 ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device *ieee,
 302                                 struct sk_buff *skb, int keyidx,
 303                                 struct ieee80211_crypt_data *crypt)
 304 {
 305         struct ieee80211_hdr_3addr *hdr;
 306         int res, hdrlen;
 307         DECLARE_MAC_BUF(mac);
 308
 309         if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
 310                 return 0;
 311
 312         hdr = (struct ieee80211_hdr_3addr *)skb->data;
 313         hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 314
 315         atomic_inc(&crypt->refcnt);
 316         res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
 317         atomic_dec(&crypt->refcnt);
 318         if (res < 0) {
 319                 printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
 320                        " (SA=%s keyidx=%d)\n",
 321                        ieee->dev->name, print_mac(mac, hdr->addr2), keyidx);
 322                 return -1;
 323         }
 324
 325         return 0;
 326 }
 327
 328 /* All received frames are sent to this function. @skb contains the frame in
 329  * IEEE 802.11 format, i.e., in the format it was sent over air.
 330  * This function is called only as a tasklet (software IRQ). */
 331 int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
 332                  struct ieee80211_rx_stats *rx_stats)
 333 {
 334         struct net_device *dev = ieee->dev;
 335         struct ieee80211_hdr_4addr *hdr;
 336         size_t hdrlen;
 337         u16 fc, type, stype, sc;
 338         struct net_device_stats *stats;
 339         unsigned int frag;
 340         u8 *payload;
 341         u16 ethertype;
 342 #ifdef NOT_YET
 343         struct net_device *wds = NULL;
 344         struct sk_buff *skb2 = NULL;
 345         struct net_device *wds = NULL;
 346         int frame_authorized = 0;
 347         int from_assoc_ap = 0;
 348         void *sta = NULL;
 349 #endif
 350         u8 dst[ETH_ALEN];
 351         u8 src[ETH_ALEN];
 352         struct ieee80211_crypt_data *crypt = NULL;
 353         int keyidx = 0;
 354         int can_be_decrypted = 0;
 355         DECLARE_MAC_BUF(mac);
 356
 357         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 358         stats = &ieee->stats;
 359
 360         if (skb->len < 10) {
 361                 printk(KERN_INFO "%s: SKB length < 10\n", dev->name);
 362                 goto rx_dropped;
 363         }
 364
 365         fc = le16_to_cpu(hdr->frame_ctl);
 366         type = WLAN_FC_GET_TYPE(fc);
 367         stype = WLAN_FC_GET_STYPE(fc);
 368         sc = le16_to_cpu(hdr->seq_ctl);
 369         frag = WLAN_GET_SEQ_FRAG(sc);
 370         hdrlen = ieee80211_get_hdrlen(fc);
 371
 372         if (skb->len < hdrlen) {
 373                 printk(KERN_INFO "%s: invalid SKB length %d\n",
 374                         dev->name, skb->len);
 375                 goto rx_dropped;
 376         }
 377
 378         /* Put this code here so that we avoid duplicating it in all
 379          * Rx paths. - Jean II */
 380 #ifdef CONFIG_WIRELESS_EXT
 381 #ifdef IW_WIRELESS_SPY          /* defined in iw_handler.h */
 382         /* If spy monitoring on */
 383         if (ieee->spy_data.spy_number > 0) {
 384                 struct iw_quality wstats;
 385
 386                 wstats.updated = 0;
 387                 if (rx_stats->mask & IEEE80211_STATMASK_RSSI) {
 388                         wstats.level = rx_stats->rssi;
 389                         wstats.updated |= IW_QUAL_LEVEL_UPDATED;
 390                 } else
 391                         wstats.updated |= IW_QUAL_LEVEL_INVALID;
 392
 393                 if (rx_stats->mask & IEEE80211_STATMASK_NOISE) {
 394                         wstats.noise = rx_stats->noise;
 395                         wstats.updated |= IW_QUAL_NOISE_UPDATED;
 396                 } else
 397                         wstats.updated |= IW_QUAL_NOISE_INVALID;
 398
 399                 if (rx_stats->mask & IEEE80211_STATMASK_SIGNAL) {
 400                         wstats.qual = rx_stats->signal;
 401                         wstats.updated |= IW_QUAL_QUAL_UPDATED;
 402                 } else
 403                         wstats.updated |= IW_QUAL_QUAL_INVALID;
 404
 405                 /* Update spy records */
 406                 wireless_spy_update(ieee->dev, hdr->addr2, &wstats);
 407         }
 408 #endif                          /* IW_WIRELESS_SPY */
 409 #endif                          /* CONFIG_WIRELESS_EXT */
 410
 411 #ifdef NOT_YET
 412         hostap_update_rx_stats(local->ap, hdr, rx_stats);
 413 #endif
 414
 415         if (ieee->iw_mode == IW_MODE_MONITOR) {
 416                 stats->rx_packets++;
 417                 stats->rx_bytes += skb->len;
 418                 ieee80211_monitor_rx(ieee, skb, rx_stats);
 419                 return 1;
 420         }
 421
 422         can_be_decrypted = (is_multicast_ether_addr(hdr->addr1) ||
 423                             is_broadcast_ether_addr(hdr->addr2)) ?
 424             ieee->host_mc_decrypt : ieee->host_decrypt;
 425
 426         if (can_be_decrypted) {
 427                 if (skb->len >= hdrlen + 3) {
 428                         /* Top two-bits of byte 3 are the key index */
 429                         keyidx = skb->data[hdrlen + 3] >> 6;
 430                 }
 431
 432                 /* ieee->crypt[] is WEP_KEY (4) in length.  Given that keyidx
 433                  * is only allowed 2-bits of storage, no value of keyidx can
 434                  * be provided via above code that would result in keyidx
 435                  * being out of range */
 436                 crypt = ieee->crypt[keyidx];
 437
 438 #ifdef NOT_YET
 439                 sta = NULL;
 440
 441                 /* Use station specific key to override default keys if the
 442                  * receiver address is a unicast address ("individual RA"). If
 443                  * bcrx_sta_key parameter is set, station specific key is used
 444                  * even with broad/multicast targets (this is against IEEE
 445                  * 802.11, but makes it easier to use different keys with
 446                  * stations that do not support WEP key mapping). */
 447
 448                 if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key)
 449                         (void)hostap_handle_sta_crypto(local, hdr, &crypt,
 450                                                        &sta);
 451 #endif
 452
 453                 /* allow NULL decrypt to indicate an station specific override
 454                  * for default encryption */
 455                 if (crypt && (crypt->ops == NULL ||
 456                               crypt->ops->decrypt_mpdu == NULL))
 457                         crypt = NULL;
 458
 459                 if (!crypt && (fc & IEEE80211_FCTL_PROTECTED)) {
 460                         /* This seems to be triggered by some (multicast?)
 461                          * frames from other than current BSS, so just drop the
 462                          * frames silently instead of filling system log with
 463                          * these reports. */
 464                         IEEE80211_DEBUG_DROP("Decryption failed (not set)"
 465                                              " (SA=%s)\n",
 466                                              print_mac(mac, hdr->addr2));
 467                         ieee->ieee_stats.rx_discards_undecryptable++;
 468                         goto rx_dropped;
 469                 }
 470         }
 471 #ifdef NOT_YET
 472         if (type != WLAN_FC_TYPE_DATA) {
 473                 if (type == WLAN_FC_TYPE_MGMT && stype == WLAN_FC_STYPE_AUTH &&
 474                     fc & IEEE80211_FCTL_PROTECTED && ieee->host_decrypt &&
 475                     (keyidx = hostap_rx_frame_decrypt(ieee, skb, crypt)) < 0) {
 476                         printk(KERN_DEBUG "%s: failed to decrypt mgmt::auth "
 477                                "from %s\n", dev->name,
 478                                print_mac(mac, hdr->addr2));
 479                         /* TODO: could inform hostapd about this so that it
 480                          * could send auth failure report */
 481                         goto rx_dropped;
 482                 }
 483
 484                 if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
 485                         goto rx_dropped;
 486                 else
 487                         goto rx_exit;
 488         }
 489 #endif
 490         /* drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.29) */
 491         if (sc == ieee->prev_seq_ctl)
 492                 goto rx_dropped;
 493         else
 494                 ieee->prev_seq_ctl = sc;
 495
 496         /* Data frame - extract src/dst addresses */
 497         if (skb->len < IEEE80211_3ADDR_LEN)
 498                 goto rx_dropped;
 499
 500         switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
 501         case IEEE80211_FCTL_FROMDS:
 502                 memcpy(dst, hdr->addr1, ETH_ALEN);
 503                 memcpy(src, hdr->addr3, ETH_ALEN);
 504                 break;
 505         case IEEE80211_FCTL_TODS:
 506                 memcpy(dst, hdr->addr3, ETH_ALEN);
 507                 memcpy(src, hdr->addr2, ETH_ALEN);
 508                 break;
 509         case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
 510                 if (skb->len < IEEE80211_4ADDR_LEN)
 511                         goto rx_dropped;
 512                 memcpy(dst, hdr->addr3, ETH_ALEN);
 513                 memcpy(src, hdr->addr4, ETH_ALEN);
 514                 break;
 515         case 0:
 516                 memcpy(dst, hdr->addr1, ETH_ALEN);
 517                 memcpy(src, hdr->addr2, ETH_ALEN);
 518                 break;
 519         }
 520
 521 #ifdef NOT_YET
 522         if (hostap_rx_frame_wds(ieee, hdr, fc, &wds))
 523                 goto rx_dropped;
 524         if (wds) {
 525                 skb->dev = dev = wds;
 526                 stats = hostap_get_stats(dev);
 527         }
 528
 529         if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
 530             (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 531             IEEE80211_FCTL_FROMDS && ieee->stadev
 532             && !compare_ether_addr(hdr->addr2, ieee->assoc_ap_addr)) {
 533                 /* Frame from BSSID of the AP for which we are a client */
 534                 skb->dev = dev = ieee->stadev;
 535                 stats = hostap_get_stats(dev);
 536                 from_assoc_ap = 1;
 537         }
 538 #endif
 539
 540         dev->last_rx = jiffies;
 541
 542 #ifdef NOT_YET
 543         if ((ieee->iw_mode == IW_MODE_MASTER ||
 544              ieee->iw_mode == IW_MODE_REPEAT) && !from_assoc_ap) {
 545                 switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats,
 546                                              wds != NULL)) {
 547                 case AP_RX_CONTINUE_NOT_AUTHORIZED:
 548                         frame_authorized = 0;
 549                         break;
 550                 case AP_RX_CONTINUE:
 551                         frame_authorized = 1;
 552                         break;
 553                 case AP_RX_DROP:
 554                         goto rx_dropped;
 555                 case AP_RX_EXIT:
 556                         goto rx_exit;
 557                 }
 558         }
 559 #endif
 560
 561         /* Nullfunc frames may have PS-bit set, so they must be passed to
 562          * hostap_handle_sta_rx() before being dropped here. */
 563
 564         stype &= ~IEEE80211_STYPE_QOS_DATA;
 565
 566         if (stype != IEEE80211_STYPE_DATA &&
 567             stype != IEEE80211_STYPE_DATA_CFACK &&
 568             stype != IEEE80211_STYPE_DATA_CFPOLL &&
 569             stype != IEEE80211_STYPE_DATA_CFACKPOLL) {
 570                 if (stype != IEEE80211_STYPE_NULLFUNC)
 571                         IEEE80211_DEBUG_DROP("RX: dropped data frame "
 572                                              "with no data (type=0x%02x, "
 573                                              "subtype=0x%02x, len=%d)\n",
 574                                              type, stype, skb->len);
 575                 goto rx_dropped;
 576         }
 577
 578         /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
 579
 580         if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
 581             (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0)
 582                 goto rx_dropped;
 583
 584         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 585
 586         /* skb: hdr + (possibly fragmented) plaintext payload */
 587         // PR: FIXME: hostap has additional conditions in the "if" below:
 588         // ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
 589         if ((frag != 0) || (fc & IEEE80211_FCTL_MOREFRAGS)) {
 590                 int flen;
 591                 struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr);
 592                 IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
 593
 594                 if (!frag_skb) {
 595                         IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG,
 596                                         "Rx cannot get skb from fragment "
 597                                         "cache (morefrag=%d seq=%u frag=%u)\n",
 598                                         (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
 599                                         WLAN_GET_SEQ_SEQ(sc), frag);
 600                         goto rx_dropped;
 601                 }
 602
 603                 flen = skb->len;
 604                 if (frag != 0)
 605                         flen -= hdrlen;
 606
 607                 if (frag_skb->tail + flen > frag_skb->end) {
 608                         printk(KERN_WARNING "%s: host decrypted and "
 609                                "reassembled frame did not fit skb\n",
 610                                dev->name);
 611                         ieee80211_frag_cache_invalidate(ieee, hdr);
 612                         goto rx_dropped;
 613                 }
 614
 615                 if (frag == 0) {
 616                         /* copy first fragment (including full headers) into
 617                          * beginning of the fragment cache skb */
 618                         skb_copy_from_linear_data(skb, skb_put(frag_skb, flen), flen);
 619                 } else {
 620                         /* append frame payload to the end of the fragment
 621                          * cache skb */
 622                         skb_copy_from_linear_data_offset(skb, hdrlen,
 623                                       skb_put(frag_skb, flen), flen);
 624                 }
 625                 dev_kfree_skb_any(skb);
 626                 skb = NULL;
 627
 628                 if (fc & IEEE80211_FCTL_MOREFRAGS) {
 629                         /* more fragments expected - leave the skb in fragment
 630                          * cache for now; it will be delivered to upper layers
 631                          * after all fragments have been received */
 632                         goto rx_exit;
 633                 }
 634
 635                 /* this was the last fragment and the frame will be
 636                  * delivered, so remove skb from fragment cache */
 637                 skb = frag_skb;
 638                 hdr = (struct ieee80211_hdr_4addr *)skb->data;
 639                 ieee80211_frag_cache_invalidate(ieee, hdr);
 640         }
 641
 642         /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
 643          * encrypted/authenticated */
 644         if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
 645             ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
 646                 goto rx_dropped;
 647
 648         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 649         if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep) {
 650                 if (            /*ieee->ieee802_1x && */
 651                            ieee80211_is_eapol_frame(ieee, skb)) {
 652                         /* pass unencrypted EAPOL frames even if encryption is
 653                          * configured */
 654                 } else {
 655                         IEEE80211_DEBUG_DROP("encryption configured, but RX "
 656                                              "frame not encrypted (SA=%s"
 657                                              ")\n", print_mac(mac, hdr->addr2));
 658                         goto rx_dropped;
 659                 }
 660         }
 661
 662         if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep &&
 663             !ieee80211_is_eapol_frame(ieee, skb)) {
 664                 IEEE80211_DEBUG_DROP("dropped unencrypted RX data "
 665                                      "frame from %s"
 666                                      " (drop_unencrypted=1)\n",
 667                                      print_mac(mac, hdr->addr2));
 668                 goto rx_dropped;
 669         }
 670
 671         /* If the frame was decrypted in hardware, we may need to strip off
 672          * any security data (IV, ICV, etc) that was left behind */
 673         if (!can_be_decrypted && (fc & IEEE80211_FCTL_PROTECTED) &&
 674             ieee->host_strip_iv_icv) {
 675                 int trimlen = 0;
 676
 677                 /* Top two-bits of byte 3 are the key index */
 678                 if (skb->len >= hdrlen + 3)
 679                         keyidx = skb->data[hdrlen + 3] >> 6;
 680
 681                 /* To strip off any security data which appears before the
 682                  * payload, we simply increase hdrlen (as the header gets
 683                  * chopped off immediately below). For the security data which
 684                  * appears after the payload, we use skb_trim. */
 685
 686                 switch (ieee->sec.encode_alg[keyidx]) {
 687                 case SEC_ALG_WEP:
 688                         /* 4 byte IV */
 689                         hdrlen += 4;
 690                         /* 4 byte ICV */
 691                         trimlen = 4;
 692                         break;
 693                 case SEC_ALG_TKIP:
 694                         /* 4 byte IV, 4 byte ExtIV */
 695                         hdrlen += 8;
 696                         /* 8 byte MIC, 4 byte ICV */
 697                         trimlen = 12;
 698                         break;
 699                 case SEC_ALG_CCMP:
 700                         /* 8 byte CCMP header */
 701                         hdrlen += 8;
 702                         /* 8 byte MIC */
 703                         trimlen = 8;
 704                         break;
 705                 }
 706
 707                 if (skb->len < trimlen)
 708                         goto rx_dropped;
 709
 710                 __skb_trim(skb, skb->len - trimlen);
 711
 712                 if (skb->len < hdrlen)
 713                         goto rx_dropped;
 714         }
 715
 716         /* skb: hdr + (possible reassembled) full plaintext payload */
 717
 718         payload = skb->data + hdrlen;
 719         ethertype = (payload[6] << 8) | payload[7];
 720
 721 #ifdef NOT_YET
 722         /* If IEEE 802.1X is used, check whether the port is authorized to send
 723          * the received frame. */
 724         if (ieee->ieee802_1x && ieee->iw_mode == IW_MODE_MASTER) {
 725                 if (ethertype == ETH_P_PAE) {
 726                         printk(KERN_DEBUG "%s: RX: IEEE 802.1X frame\n",
 727                                dev->name);
 728                         if (ieee->hostapd && ieee->apdev) {
 729                                 /* Send IEEE 802.1X frames to the user
 730                                  * space daemon for processing */
 731                                 prism2_rx_80211(ieee->apdev, skb, rx_stats,
 732                                                 PRISM2_RX_MGMT);
 733                                 ieee->apdevstats.rx_packets++;
 734                                 ieee->apdevstats.rx_bytes += skb->len;
 735                                 goto rx_exit;
 736                         }
 737                 } else if (!frame_authorized) {
 738                         printk(KERN_DEBUG "%s: dropped frame from "
 739                                "unauthorized port (IEEE 802.1X): "
 740                                "ethertype=0x%04x\n", dev->name, ethertype);
 741                         goto rx_dropped;
 742                 }
 743         }
 744 #endif
 745
 746         /* convert hdr + possible LLC headers into Ethernet header */
 747         if (skb->len - hdrlen >= 8 &&
 748             ((memcmp(payload, rfc1042_header, SNAP_SIZE) == 0 &&
 749               ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
 750              memcmp(payload, bridge_tunnel_header, SNAP_SIZE) == 0)) {
 751                 /* remove RFC1042 or Bridge-Tunnel encapsulation and
 752                  * replace EtherType */
 753                 skb_pull(skb, hdrlen + SNAP_SIZE);
 754                 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
 755                 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
 756         } else {
 757                 u16 len;
 758                 /* Leave Ethernet header part of hdr and full payload */
 759                 skb_pull(skb, hdrlen);
 760                 len = htons(skb->len);
 761                 memcpy(skb_push(skb, 2), &len, 2);
 762                 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
 763                 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
 764         }
 765
 766 #ifdef NOT_YET
 767         if (wds && ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 768                     IEEE80211_FCTL_TODS) && skb->len >= ETH_HLEN + ETH_ALEN) {
 769                 /* Non-standard frame: get addr4 from its bogus location after
 770                  * the payload */
 771                 skb_copy_to_linear_data_offset(skb, ETH_ALEN,
 772                                                skb->data + skb->len - ETH_ALEN,
 773                                                ETH_ALEN);
 774                 skb_trim(skb, skb->len - ETH_ALEN);
 775         }
 776 #endif
 777
 778         stats->rx_packets++;
 779         stats->rx_bytes += skb->len;
 780
 781 #ifdef NOT_YET
 782         if (ieee->iw_mode == IW_MODE_MASTER && !wds && ieee->ap->bridge_packets) {
 783                 if (dst[0] & 0x01) {
 784                         /* copy multicast frame both to the higher layers and
 785                          * to the wireless media */
 786                         ieee->ap->bridged_multicast++;
 787                         skb2 = skb_clone(skb, GFP_ATOMIC);
 788                         if (skb2 == NULL)
 789                                 printk(KERN_DEBUG "%s: skb_clone failed for "
 790                                        "multicast frame\n", dev->name);
 791                 } else if (hostap_is_sta_assoc(ieee->ap, dst)) {
 792                         /* send frame directly to the associated STA using
 793                          * wireless media and not passing to higher layers */
 794                         ieee->ap->bridged_unicast++;
 795                         skb2 = skb;
 796                         skb = NULL;
 797                 }
 798         }
 799
 800         if (skb2 != NULL) {
 801                 /* send to wireless media */
 802                 skb2->dev = dev;
 803                 skb2->protocol = htons(ETH_P_802_3);
 804                 skb_reset_mac_header(skb2);
 805                 skb_reset_network_header(skb2);
 806                 /* skb2->network_header += ETH_HLEN; */
 807                 dev_queue_xmit(skb2);
 808         }
 809 #endif
 810
 811         if (skb) {
 812                 skb->protocol = eth_type_trans(skb, dev);
 813                 memset(skb->cb, 0, sizeof(skb->cb));
 814                 skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
 815                 if (netif_rx(skb) == NET_RX_DROP) {
 816                         /* netif_rx always succeeds, but it might drop
 817                          * the packet.  If it drops the packet, we log that
 818                          * in our stats. */
 819                         IEEE80211_DEBUG_DROP
 820                             ("RX: netif_rx dropped the packet\n");
 821                         stats->rx_dropped++;
 822                 }
 823         }
 824
 825       rx_exit:
 826 #ifdef NOT_YET
 827         if (sta)
 828                 hostap_handle_sta_release(sta);
 829 #endif
 830         return 1;
 831
 832       rx_dropped:
 833         stats->rx_dropped++;
 834
 835         /* Returning 0 indicates to caller that we have not handled the SKB--
 836          * so it is still allocated and can be used again by underlying
 837          * hardware as a DMA target */
 838         return 0;
 839 }
 840
 841 /* Filter out unrelated packets, call ieee80211_rx[_mgt]
 842  * This function takes over the skb, it should not be used again after calling
 843  * this function. */
 844 void ieee80211_rx_any(struct ieee80211_device *ieee,
 845                      struct sk_buff *skb, struct ieee80211_rx_stats *stats)
 846 {
 847         struct ieee80211_hdr_4addr *hdr;
 848         int is_packet_for_us;
 849         u16 fc;
 850
 851         if (ieee->iw_mode == IW_MODE_MONITOR) {
 852                 if (!ieee80211_rx(ieee, skb, stats))
 853                         dev_kfree_skb_irq(skb);
 854                 return;
 855         }
 856
 857         if (skb->len < sizeof(struct ieee80211_hdr))
 858                 goto drop_free;
 859
 860         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 861         fc = le16_to_cpu(hdr->frame_ctl);
 862
 863         if ((fc & IEEE80211_FCTL_VERS) != 0)
 864                 goto drop_free;
 865
 866         switch (fc & IEEE80211_FCTL_FTYPE) {
 867         case IEEE80211_FTYPE_MGMT:
 868                 if (skb->len < sizeof(struct ieee80211_hdr_3addr))
 869                         goto drop_free;
 870                 ieee80211_rx_mgt(ieee, hdr, stats);
 871                 dev_kfree_skb_irq(skb);
 872                 return;
 873         case IEEE80211_FTYPE_DATA:
 874                 break;
 875         case IEEE80211_FTYPE_CTL:
 876                 return;
 877         default:
 878                 return;
 879         }
 880
 881         is_packet_for_us = 0;
 882         switch (ieee->iw_mode) {
 883         case IW_MODE_ADHOC:
 884                 /* our BSS and not from/to DS */
 885                 if (memcmp(hdr->addr3, ieee->bssid, ETH_ALEN) == 0)
 886                 if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == 0) {
 887                         /* promisc: get all */
 888                         if (ieee->dev->flags & IFF_PROMISC)
 889                                 is_packet_for_us = 1;
 890                         /* to us */
 891                         else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0)
 892                                 is_packet_for_us = 1;
 893                         /* mcast */
 894                         else if (is_multicast_ether_addr(hdr->addr1))
 895                                 is_packet_for_us = 1;
 896                 }
 897                 break;
 898         case IW_MODE_INFRA:
 899                 /* our BSS (== from our AP) and from DS */
 900                 if (memcmp(hdr->addr2, ieee->bssid, ETH_ALEN) == 0)
 901                 if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS) {
 902                         /* promisc: get all */
 903                         if (ieee->dev->flags & IFF_PROMISC)
 904                                 is_packet_for_us = 1;
 905                         /* to us */
 906                         else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0)
 907                                 is_packet_for_us = 1;
 908                         /* mcast */
 909                         else if (is_multicast_ether_addr(hdr->addr1)) {
 910                                 /* not our own packet bcasted from AP */
 911                                 if (memcmp(hdr->addr3, ieee->dev->dev_addr, ETH_ALEN))
 912                                         is_packet_for_us = 1;
 913                         }
 914                 }
 915                 break;
 916         default:
 917                 /* ? */
 918                 break;
 919         }
 920
 921         if (is_packet_for_us)
 922                 if (!ieee80211_rx(ieee, skb, stats))
 923                         dev_kfree_skb_irq(skb);
 924         return;
 925
 926 drop_free:
 927         dev_kfree_skb_irq(skb);
 928         ieee->stats.rx_dropped++;
 929         return;
 930 }
 931
 932 #define MGMT_FRAME_FIXED_PART_LENGTH            0x24
 933
 934 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
 935
 936 /*
 937 * Make ther structure we read from the beacon packet has
 938 * the right values
 939 */
 940 static int ieee80211_verify_qos_info(struct ieee80211_qos_information_element
 941                                      *info_element, int sub_type)
 942 {
 943
 944         if (info_element->qui_subtype != sub_type)
 945                 return -1;
 946         if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
 947                 return -1;
 948         if (info_element->qui_type != QOS_OUI_TYPE)
 949                 return -1;
 950         if (info_element->version != QOS_VERSION_1)
 951                 return -1;
 952
 953         return 0;
 954 }
 955
 956 /*
 957  * Parse a QoS parameter element
 958  */
 959 static int ieee80211_read_qos_param_element(struct ieee80211_qos_parameter_info
 960                                             *element_param, struct ieee80211_info_element
 961                                             *info_element)
 962 {
 963         int ret = 0;
 964         u16 size = sizeof(struct ieee80211_qos_parameter_info) - 2;
 965
 966         if ((info_element == NULL) || (element_param == NULL))
 967                 return -1;
 968
 969         if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
 970                 memcpy(element_param->info_element.qui, info_element->data,
 971                        info_element->len);
 972                 element_param->info_element.elementID = info_element->id;
 973                 element_param->info_element.length = info_element->len;
 974         } else
 975                 ret = -1;
 976         if (ret == 0)
 977                 ret = ieee80211_verify_qos_info(&element_param->info_element,
 978                                                 QOS_OUI_PARAM_SUB_TYPE);
 979         return ret;
 980 }
 981
 982 /*
 983  * Parse a QoS information element
 984  */
 985 static int ieee80211_read_qos_info_element(struct
 986                                            ieee80211_qos_information_element
 987                                            *element_info, struct ieee80211_info_element
 988                                            *info_element)
 989 {
 990         int ret = 0;
 991         u16 size = sizeof(struct ieee80211_qos_information_element) - 2;
 992
 993         if (element_info == NULL)
 994                 return -1;
 995         if (info_element == NULL)
 996                 return -1;
 997
 998         if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
 999                 memcpy(element_info->qui, info_element->data,
1000                        info_element->len);
1001                 element_info->elementID = info_element->id;
1002                 element_info->length = info_element->len;
1003         } else
1004                 ret = -1;
1005
1006         if (ret == 0)
1007                 ret = ieee80211_verify_qos_info(element_info,
1008                                                 QOS_OUI_INFO_SUB_TYPE);
1009         return ret;
1010 }
1011
1012 /*
1013  * Write QoS parameters from the ac parameters.
1014  */
1015 static int ieee80211_qos_convert_ac_to_parameters(struct
1016                                                   ieee80211_qos_parameter_info
1017                                                   *param_elm, struct
1018                                                   ieee80211_qos_parameters
1019                                                   *qos_param)
1020 {
1021         int rc = 0;
1022         int i;
1023         struct ieee80211_qos_ac_parameter *ac_params;
1024         u32 txop;
1025         u8 cw_min;
1026         u8 cw_max;
1027
1028         for (i = 0; i < QOS_QUEUE_NUM; i++) {
1029                 ac_params = &(param_elm->ac_params_record[i]);
1030
1031                 qos_param->aifs[i] = (ac_params->aci_aifsn) & 0x0F;
1032                 qos_param->aifs[i] -= (qos_param->aifs[i] < 2) ? 0 : 2;
1033
1034                 cw_min = ac_params->ecw_min_max & 0x0F;
1035                 qos_param->cw_min[i] = cpu_to_le16((1 << cw_min) - 1);
1036
1037                 cw_max = (ac_params->ecw_min_max & 0xF0) >> 4;
1038                 qos_param->cw_max[i] = cpu_to_le16((1 << cw_max) - 1);
1039
1040                 qos_param->flag[i] =
1041                     (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1042
1043                 txop = le16_to_cpu(ac_params->tx_op_limit) * 32;
1044                 qos_param->tx_op_limit[i] = cpu_to_le16(txop);
1045         }
1046         return rc;
1047 }
1048
1049 /*
1050  * we have a generic data element which it may contain QoS information or
1051  * parameters element. check the information element length to decide
1052  * which type to read
1053  */
1054 static int ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element
1055                                              *info_element,
1056                                              struct ieee80211_network *network)
1057 {
1058         int rc = 0;
1059         struct ieee80211_qos_parameters *qos_param = NULL;
1060         struct ieee80211_qos_information_element qos_info_element;
1061
1062         rc = ieee80211_read_qos_info_element(&qos_info_element, info_element);
1063
1064         if (rc == 0) {
1065                 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1066                 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1067         } else {
1068                 struct ieee80211_qos_parameter_info param_element;
1069
1070                 rc = ieee80211_read_qos_param_element(&param_element,
1071                                                       info_element);
1072                 if (rc == 0) {
1073                         qos_param = &(network->qos_data.parameters);
1074                         ieee80211_qos_convert_ac_to_parameters(&param_element,
1075                                                                qos_param);
1076                         network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1077                         network->qos_data.param_count =
1078                             param_element.info_element.ac_info & 0x0F;
1079                 }
1080         }
1081
1082         if (rc == 0) {
1083                 IEEE80211_DEBUG_QOS("QoS is supported\n");
1084                 network->qos_data.supported = 1;
1085         }
1086         return rc;
1087 }
1088
1089 #ifdef CONFIG_IEEE80211_DEBUG
1090 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
1091
1092 static const char *get_info_element_string(u16 id)
1093 {
1094         switch (id) {
1095                 MFIE_STRING(SSID);
1096                 MFIE_STRING(RATES);
1097                 MFIE_STRING(FH_SET);
1098                 MFIE_STRING(DS_SET);
1099                 MFIE_STRING(CF_SET);
1100                 MFIE_STRING(TIM);
1101                 MFIE_STRING(IBSS_SET);
1102                 MFIE_STRING(COUNTRY);
1103                 MFIE_STRING(HOP_PARAMS);
1104                 MFIE_STRING(HOP_TABLE);
1105                 MFIE_STRING(REQUEST);
1106                 MFIE_STRING(CHALLENGE);
1107                 MFIE_STRING(POWER_CONSTRAINT);
1108                 MFIE_STRING(POWER_CAPABILITY);
1109                 MFIE_STRING(TPC_REQUEST);
1110                 MFIE_STRING(TPC_REPORT);
1111                 MFIE_STRING(SUPP_CHANNELS);
1112                 MFIE_STRING(CSA);
1113                 MFIE_STRING(MEASURE_REQUEST);
1114                 MFIE_STRING(MEASURE_REPORT);
1115                 MFIE_STRING(QUIET);
1116                 MFIE_STRING(IBSS_DFS);
1117                 MFIE_STRING(ERP_INFO);
1118                 MFIE_STRING(RSN);
1119                 MFIE_STRING(RATES_EX);
1120                 MFIE_STRING(GENERIC);
1121                 MFIE_STRING(QOS_PARAMETER);
1122         default:
1123                 return "UNKNOWN";
1124         }
1125 }
1126 #endif
1127
1128 static int ieee80211_parse_info_param(struct ieee80211_info_element
1129                                       *info_element, u16 length,
1130                                       struct ieee80211_network *network)
1131 {
1132         u8 i;
1133 #ifdef CONFIG_IEEE80211_DEBUG
1134         char rates_str[64];
1135         char *p;
1136 #endif
1137
1138         while (length >= sizeof(*info_element)) {
1139                 if (sizeof(*info_element) + info_element->len > length) {
1140                         IEEE80211_DEBUG_MGMT("Info elem: parse failed: "
1141                                              "info_element->len + 2 > left : "
1142                                              "info_element->len+2=%zd left=%d, id=%d.\n",
1143                                              info_element->len +
1144                                              sizeof(*info_element),
1145                                              length, info_element->id);
1146                         /* We stop processing but don't return an error here
1147                          * because some misbehaviour APs break this rule. ie.
1148                          * Orinoco AP1000. */
1149                         break;
1150                 }
1151
1152                 switch (info_element->id) {
1153                 case MFIE_TYPE_SSID:
1154                         if (ieee80211_is_empty_essid(info_element->data,
1155                                                      info_element->len)) {
1156                                 network->flags |= NETWORK_EMPTY_ESSID;
1157                                 break;
1158                         }
1159
1160                         network->ssid_len = min(info_element->len,
1161                                                 (u8) IW_ESSID_MAX_SIZE);
1162                         memcpy(network->ssid, info_element->data,
1163                                network->ssid_len);
1164                         if (network->ssid_len < IW_ESSID_MAX_SIZE)
1165                                 memset(network->ssid + network->ssid_len, 0,
1166                                        IW_ESSID_MAX_SIZE - network->ssid_len);
1167
1168                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
1169                                              network->ssid, network->ssid_len);
1170                         break;
1171
1172                 case MFIE_TYPE_RATES:
1173 #ifdef CONFIG_IEEE80211_DEBUG
1174                         p = rates_str;
1175 #endif
1176                         network->rates_len = min(info_element->len,
1177                                                  MAX_RATES_LENGTH);
1178                         for (i = 0; i < network->rates_len; i++) {
1179                                 network->rates[i] = info_element->data[i];
1180 #ifdef CONFIG_IEEE80211_DEBUG
1181                                 p += snprintf(p, sizeof(rates_str) -
1182                                               (p - rates_str), "%02X ",
1183                                               network->rates[i]);
1184 #endif
1185                                 if (ieee80211_is_ofdm_rate
1186                                     (info_element->data[i])) {
1187                                         network->flags |= NETWORK_HAS_OFDM;
1188                                         if (info_element->data[i] &
1189                                             IEEE80211_BASIC_RATE_MASK)
1190                                                 network->flags &=
1191                                                     ~NETWORK_HAS_CCK;
1192                                 }
1193                         }
1194
1195                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
1196                                              rates_str, network->rates_len);
1197                         break;
1198
1199                 case MFIE_TYPE_RATES_EX:
1200 #ifdef CONFIG_IEEE80211_DEBUG
1201                         p = rates_str;
1202 #endif
1203                         network->rates_ex_len = min(info_element->len,
1204                                                     MAX_RATES_EX_LENGTH);
1205                         for (i = 0; i < network->rates_ex_len; i++) {
1206                                 network->rates_ex[i] = info_element->data[i];
1207 #ifdef CONFIG_IEEE80211_DEBUG
1208                                 p += snprintf(p, sizeof(rates_str) -
1209                                               (p - rates_str), "%02X ",
1210                                               network->rates[i]);
1211 #endif
1212                                 if (ieee80211_is_ofdm_rate
1213                                     (info_element->data[i])) {
1214                                         network->flags |= NETWORK_HAS_OFDM;
1215                                         if (info_element->data[i] &
1216                                             IEEE80211_BASIC_RATE_MASK)
1217                                                 network->flags &=
1218                                                     ~NETWORK_HAS_CCK;
1219                                 }
1220                         }
1221
1222                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1223                                              rates_str, network->rates_ex_len);
1224                         break;
1225
1226                 case MFIE_TYPE_DS_SET:
1227                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
1228                                              info_element->data[0]);
1229                         network->channel = info_element->data[0];
1230                         break;
1231
1232                 case MFIE_TYPE_FH_SET:
1233                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
1234                         break;
1235
1236                 case MFIE_TYPE_CF_SET:
1237                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
1238                         break;
1239
1240                 case MFIE_TYPE_TIM:
1241                         network->tim.tim_count = info_element->data[0];
1242                         network->tim.tim_period = info_element->data[1];
1243                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_TIM: partially ignored\n");
1244                         break;
1245
1246                 case MFIE_TYPE_ERP_INFO:
1247                         network->erp_value = info_element->data[0];
1248                         network->flags |= NETWORK_HAS_ERP_VALUE;
1249                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1250                                              network->erp_value);
1251                         break;
1252
1253                 case MFIE_TYPE_IBSS_SET:
1254                         network->atim_window = info_element->data[0];
1255                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
1256                                              network->atim_window);
1257                         break;
1258
1259                 case MFIE_TYPE_CHALLENGE:
1260                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
1261                         break;
1262
1263                 case MFIE_TYPE_GENERIC:
1264                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
1265                                              info_element->len);
1266                         if (!ieee80211_parse_qos_info_param_IE(info_element,
1267                                                                network))
1268                                 break;
1269
1270                         if (info_element->len >= 4 &&
1271                             info_element->data[0] == 0x00 &&
1272                             info_element->data[1] == 0x50 &&
1273                             info_element->data[2] == 0xf2 &&
1274                             info_element->data[3] == 0x01) {
1275                                 network->wpa_ie_len = min(info_element->len + 2,
1276                                                           MAX_WPA_IE_LEN);
1277                                 memcpy(network->wpa_ie, info_element,
1278                                        network->wpa_ie_len);
1279                         }
1280                         break;
1281
1282                 case MFIE_TYPE_RSN:
1283                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
1284                                              info_element->len);
1285                         network->rsn_ie_len = min(info_element->len + 2,
1286                                                   MAX_WPA_IE_LEN);
1287                         memcpy(network->rsn_ie, info_element,
1288                                network->rsn_ie_len);
1289                         break;
1290
1291                 case MFIE_TYPE_QOS_PARAMETER:
1292                         printk(KERN_ERR
1293                                "QoS Error need to parse QOS_PARAMETER IE\n");
1294                         break;
1295                         /* 802.11h */
1296                 case MFIE_TYPE_POWER_CONSTRAINT:
1297                         network->power_constraint = info_element->data[0];
1298                         network->flags |= NETWORK_HAS_POWER_CONSTRAINT;
1299                         break;
1300
1301                 case MFIE_TYPE_CSA:
1302                         network->power_constraint = info_element->data[0];
1303                         network->flags |= NETWORK_HAS_CSA;
1304                         break;
1305
1306                 case MFIE_TYPE_QUIET:
1307                         network->quiet.count = info_element->data[0];
1308                         network->quiet.period = info_element->data[1];
1309                         network->quiet.duration = info_element->data[2];
1310                         network->quiet.offset = info_element->data[3];
1311                         network->flags |= NETWORK_HAS_QUIET;
1312                         break;
1313
1314                 case MFIE_TYPE_IBSS_DFS:
1315                         if (network->ibss_dfs)
1316                                 break;
1317                         network->ibss_dfs = kmemdup(info_element->data,
1318                                                     info_element->len,
1319                                                     GFP_ATOMIC);
1320                         if (!network->ibss_dfs)
1321                                 return 1;
1322                         network->flags |= NETWORK_HAS_IBSS_DFS;
1323                         break;
1324
1325                 case MFIE_TYPE_TPC_REPORT:
1326                         network->tpc_report.transmit_power =
1327                             info_element->data[0];
1328                         network->tpc_report.link_margin = info_element->data[1];
1329                         network->flags |= NETWORK_HAS_TPC_REPORT;
1330                         break;
1331
1332                 default:
1333                         IEEE80211_DEBUG_MGMT
1334                             ("Unsupported info element: %s (%d)\n",
1335                              get_info_element_string(info_element->id),
1336                              info_element->id);
1337                         break;
1338                 }
1339
1340                 length -= sizeof(*info_element) + info_element->len;
1341                 info_element =
1342                     (struct ieee80211_info_element *)&info_element->
1343                     data[info_element->len];
1344         }
1345
1346         return 0;
1347 }
1348
1349 static int ieee80211_handle_assoc_resp(struct ieee80211_device *ieee, struct ieee80211_assoc_response
1350                                        *frame, struct ieee80211_rx_stats *stats)
1351 {
1352         struct ieee80211_network network_resp = {
1353                 .ibss_dfs = NULL,
1354         };
1355         struct ieee80211_network *network = &network_resp;
1356         struct net_device *dev = ieee->dev;
1357
1358         network->flags = 0;
1359         network->qos_data.active = 0;
1360         network->qos_data.supported = 0;
1361         network->qos_data.param_count = 0;
1362         network->qos_data.old_param_count = 0;
1363
1364         //network->atim_window = le16_to_cpu(frame->aid) & (0x3FFF);
1365         network->atim_window = le16_to_cpu(frame->aid);
1366         network->listen_interval = le16_to_cpu(frame->status);
1367         memcpy(network->bssid, frame->header.addr3, ETH_ALEN);
1368         network->capability = le16_to_cpu(frame->capability);
1369         network->last_scanned = jiffies;
1370         network->rates_len = network->rates_ex_len = 0;
1371         network->last_associate = 0;
1372         network->ssid_len = 0;
1373         network->erp_value =
1374             (network->capability & WLAN_CAPABILITY_IBSS) ? 0x3 : 0x0;
1375
1376         if (stats->freq == IEEE80211_52GHZ_BAND) {
1377                 /* for A band (No DS info) */
1378                 network->channel = stats->received_channel;
1379         } else
1380                 network->flags |= NETWORK_HAS_CCK;
1381
1382         network->wpa_ie_len = 0;
1383         network->rsn_ie_len = 0;
1384
1385         if (ieee80211_parse_info_param
1386             (frame->info_element, stats->len - sizeof(*frame), network))
1387                 return 1;
1388
1389         network->mode = 0;
1390         if (stats->freq == IEEE80211_52GHZ_BAND)
1391                 network->mode = IEEE_A;
1392         else {
1393                 if (network->flags & NETWORK_HAS_OFDM)
1394                         network->mode |= IEEE_G;
1395                 if (network->flags & NETWORK_HAS_CCK)
1396                         network->mode |= IEEE_B;
1397         }
1398
1399         if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
1400                 network->flags |= NETWORK_EMPTY_ESSID;
1401
1402         memcpy(&network->stats, stats, sizeof(network->stats));
1403
1404         if (ieee->handle_assoc_response != NULL)
1405                 ieee->handle_assoc_response(dev, frame, network);
1406
1407         return 0;
1408 }
1409
1410 /***************************************************/
1411
1412 static int ieee80211_network_init(struct ieee80211_device *ieee, struct ieee80211_probe_response
1413                                          *beacon,
1414                                          struct ieee80211_network *network,
1415                                          struct ieee80211_rx_stats *stats)
1416 {
1417         DECLARE_MAC_BUF(mac);
1418
1419         network->qos_data.active = 0;
1420         network->qos_data.supported = 0;
1421         network->qos_data.param_count = 0;
1422         network->qos_data.old_param_count = 0;
1423
1424         /* Pull out fixed field data */
1425         memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
1426         network->capability = le16_to_cpu(beacon->capability);
1427         network->last_scanned = jiffies;
1428         network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
1429         network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
1430         network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
1431         /* Where to pull this? beacon->listen_interval; */
1432         network->listen_interval = 0x0A;
1433         network->rates_len = network->rates_ex_len = 0;
1434         network->last_associate = 0;
1435         network->ssid_len = 0;
1436         network->flags = 0;
1437         network->atim_window = 0;
1438         network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
1439             0x3 : 0x0;
1440
1441         if (stats->freq == IEEE80211_52GHZ_BAND) {
1442                 /* for A band (No DS info) */
1443                 network->channel = stats->received_channel;
1444         } else
1445                 network->flags |= NETWORK_HAS_CCK;
1446
1447         network->wpa_ie_len = 0;
1448         network->rsn_ie_len = 0;
1449
1450         if (ieee80211_parse_info_param
1451             (beacon->info_element, stats->len - sizeof(*beacon), network))
1452                 return 1;
1453
1454         network->mode = 0;
1455         if (stats->freq == IEEE80211_52GHZ_BAND)
1456                 network->mode = IEEE_A;
1457         else {
1458                 if (network->flags & NETWORK_HAS_OFDM)
1459                         network->mode |= IEEE_G;
1460                 if (network->flags & NETWORK_HAS_CCK)
1461                         network->mode |= IEEE_B;
1462         }
1463
1464         if (network->mode == 0) {
1465                 IEEE80211_DEBUG_SCAN("Filtered out '%s (%s)' "
1466                                      "network.\n",
1467                                      escape_essid(network->ssid,
1468                                                   network->ssid_len),
1469                                      print_mac(mac, network->bssid));
1470                 return 1;
1471         }
1472
1473         if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
1474                 network->flags |= NETWORK_EMPTY_ESSID;
1475
1476         memcpy(&network->stats, stats, sizeof(network->stats));
1477
1478         return 0;
1479 }
1480
1481 static inline int is_same_network(struct ieee80211_network *src,
1482                                   struct ieee80211_network *dst)
1483 {
1484         /* A network is only a duplicate if the channel, BSSID, and ESSID
1485          * all match.  We treat all <hidden> with the same BSSID and channel
1486          * as one network */
1487         return ((src->ssid_len == dst->ssid_len) &&
1488                 (src->channel == dst->channel) &&
1489                 !compare_ether_addr(src->bssid, dst->bssid) &&
1490                 !memcmp(src->ssid, dst->ssid, src->ssid_len));
1491 }
1492
1493 static void update_network(struct ieee80211_network *dst,
1494                                   struct ieee80211_network *src)
1495 {
1496         int qos_active;
1497         u8 old_param;
1498         DECLARE_MAC_BUF(mac);
1499
1500         ieee80211_network_reset(dst);
1501         dst->ibss_dfs = src->ibss_dfs;
1502
1503         /* We only update the statistics if they were created by receiving
1504          * the network information on the actual channel the network is on.
1505          *
1506          * This keeps beacons received on neighbor channels from bringing
1507          * down the signal level of an AP. */
1508         if (dst->channel == src->stats.received_channel)
1509                 memcpy(&dst->stats, &src->stats,
1510                        sizeof(struct ieee80211_rx_stats));
1511         else
1512                 IEEE80211_DEBUG_SCAN("Network %s info received "
1513                         "off channel (%d vs. %d)\n", print_mac(mac, src->bssid),
1514                         dst->channel, src->stats.received_channel);
1515
1516         dst->capability = src->capability;
1517         memcpy(dst->rates, src->rates, src->rates_len);
1518         dst->rates_len = src->rates_len;
1519         memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
1520         dst->rates_ex_len = src->rates_ex_len;
1521
1522         dst->mode = src->mode;
1523         dst->flags = src->flags;
1524         dst->time_stamp[0] = src->time_stamp[0];
1525         dst->time_stamp[1] = src->time_stamp[1];
1526
1527         dst->beacon_interval = src->beacon_interval;
1528         dst->listen_interval = src->listen_interval;
1529         dst->atim_window = src->atim_window;
1530         dst->erp_value = src->erp_value;
1531         dst->tim = src->tim;
1532
1533         memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
1534         dst->wpa_ie_len = src->wpa_ie_len;
1535         memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
1536         dst->rsn_ie_len = src->rsn_ie_len;
1537
1538         dst->last_scanned = jiffies;
1539         qos_active = src->qos_data.active;
1540         old_param = dst->qos_data.old_param_count;
1541         if (dst->flags & NETWORK_HAS_QOS_MASK)
1542                 memcpy(&dst->qos_data, &src->qos_data,
1543                        sizeof(struct ieee80211_qos_data));
1544         else {
1545                 dst->qos_data.supported = src->qos_data.supported;
1546                 dst->qos_data.param_count = src->qos_data.param_count;
1547         }
1548
1549         if (dst->qos_data.supported == 1) {
1550                 if (dst->ssid_len)
1551                         IEEE80211_DEBUG_QOS
1552                             ("QoS the network %s is QoS supported\n",
1553                              dst->ssid);
1554                 else
1555                         IEEE80211_DEBUG_QOS
1556                             ("QoS the network is QoS supported\n");
1557         }
1558         dst->qos_data.active = qos_active;
1559         dst->qos_data.old_param_count = old_param;
1560
1561         /* dst->last_associate is not overwritten */
1562 }
1563
1564 static inline int is_beacon(__le16 fc)
1565 {
1566         return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON);
1567 }
1568
1569 static void ieee80211_process_probe_response(struct ieee80211_device
1570                                                     *ieee, struct
1571                                                     ieee80211_probe_response
1572                                                     *beacon, struct ieee80211_rx_stats
1573                                                     *stats)
1574 {
1575         struct net_device *dev = ieee->dev;
1576         struct ieee80211_network network = {
1577                 .ibss_dfs = NULL,
1578         };
1579         struct ieee80211_network *target;
1580         struct ieee80211_network *oldest = NULL;
1581 #ifdef CONFIG_IEEE80211_DEBUG
1582         struct ieee80211_info_element *info_element = beacon->info_element;
1583 #endif
1584         unsigned long flags;
1585         DECLARE_MAC_BUF(mac);
1586
1587         IEEE80211_DEBUG_SCAN("'%s' (%s"
1588                              "): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
1589                              escape_essid(info_element->data,
1590                                           info_element->len),
1591                              print_mac(mac, beacon->header.addr3),
1592                              (beacon->capability & (1 << 0xf)) ? '1' : '0',
1593                              (beacon->capability & (1 << 0xe)) ? '1' : '0',
1594                              (beacon->capability & (1 << 0xd)) ? '1' : '0',
1595                              (beacon->capability & (1 << 0xc)) ? '1' : '0',
1596                              (beacon->capability & (1 << 0xb)) ? '1' : '0',
1597                              (beacon->capability & (1 << 0xa)) ? '1' : '0',
1598                              (beacon->capability & (1 << 0x9)) ? '1' : '0',
1599                              (beacon->capability & (1 << 0x8)) ? '1' : '0',
1600                              (beacon->capability & (1 << 0x7)) ? '1' : '0',
1601                              (beacon->capability & (1 << 0x6)) ? '1' : '0',
1602                              (beacon->capability & (1 << 0x5)) ? '1' : '0',
1603                              (beacon->capability & (1 << 0x4)) ? '1' : '0',
1604                              (beacon->capability & (1 << 0x3)) ? '1' : '0',
1605                              (beacon->capability & (1 << 0x2)) ? '1' : '0',
1606                              (beacon->capability & (1 << 0x1)) ? '1' : '0',
1607                              (beacon->capability & (1 << 0x0)) ? '1' : '0');
1608
1609         if (ieee80211_network_init(ieee, beacon, &network, stats)) {
1610                 IEEE80211_DEBUG_SCAN("Dropped '%s' (%s) via %s.\n",
1611                                      escape_essid(info_element->data,
1612                                                   info_element->len),
1613                                      print_mac(mac, beacon->header.addr3),
1614                                      is_beacon(beacon->header.frame_ctl) ?
1615                                      "BEACON" : "PROBE RESPONSE");
1616                 return;
1617         }
1618
1619         /* The network parsed correctly -- so now we scan our known networks
1620          * to see if we can find it in our list.
1621          *
1622          * NOTE:  This search is definitely not optimized.  Once its doing
1623          *        the "right thing" we'll optimize it for efficiency if
1624          *        necessary */
1625
1626         /* Search for this entry in the list and update it if it is
1627          * already there. */
1628
1629         spin_lock_irqsave(&ieee->lock, flags);
1630
1631         list_for_each_entry(target, &ieee->network_list, list) {
1632                 if (is_same_network(target, &network))
1633                         break;
1634
1635                 if ((oldest == NULL) ||
1636                     (target->last_scanned < oldest->last_scanned))
1637                         oldest = target;
1638         }
1639
1640         /* If we didn't find a match, then get a new network slot to initialize
1641          * with this beacon's information */
1642         if (&target->list == &ieee->network_list) {
1643                 if (list_empty(&ieee->network_free_list)) {
1644                         /* If there are no more slots, expire the oldest */
1645                         list_del(&oldest->list);
1646                         target = oldest;
1647                         IEEE80211_DEBUG_SCAN("Expired '%s' (%s) from "
1648                                              "network list.\n",
1649                                              escape_essid(target->ssid,
1650                                                           target->ssid_len),
1651                                              print_mac(mac, target->bssid));
1652                         ieee80211_network_reset(target);
1653                 } else {
1654                         /* Otherwise just pull from the free list */
1655                         target = list_entry(ieee->network_free_list.next,
1656                                             struct ieee80211_network, list);
1657                         list_del(ieee->network_free_list.next);
1658                 }
1659
1660 #ifdef CONFIG_IEEE80211_DEBUG
1661                 IEEE80211_DEBUG_SCAN("Adding '%s' (%s) via %s.\n",
1662                                      escape_essid(network.ssid,
1663                                                   network.ssid_len),
1664                                      print_mac(mac, network.bssid),
1665                                      is_beacon(beacon->header.frame_ctl) ?
1666                                      "BEACON" : "PROBE RESPONSE");
1667 #endif
1668                 memcpy(target, &network, sizeof(*target));
1669                 network.ibss_dfs = NULL;
1670                 list_add_tail(&target->list, &ieee->network_list);
1671         } else {
1672                 IEEE80211_DEBUG_SCAN("Updating '%s' (%s) via %s.\n",
1673                                      escape_essid(target->ssid,
1674                                                   target->ssid_len),
1675                                      print_mac(mac, target->bssid),
1676                                      is_beacon(beacon->header.frame_ctl) ?
1677                                      "BEACON" : "PROBE RESPONSE");
1678                 update_network(target, &network);
1679                 network.ibss_dfs = NULL;
1680         }
1681
1682         spin_unlock_irqrestore(&ieee->lock, flags);
1683
1684         if (is_beacon(beacon->header.frame_ctl)) {
1685                 if (ieee->handle_beacon != NULL)
1686                         ieee->handle_beacon(dev, beacon, target);
1687         } else {
1688                 if (ieee->handle_probe_response != NULL)
1689                         ieee->handle_probe_response(dev, beacon, target);
1690         }
1691 }
1692
1693 void ieee80211_rx_mgt(struct ieee80211_device *ieee,
1694                       struct ieee80211_hdr_4addr *header,
1695                       struct ieee80211_rx_stats *stats)
1696 {
1697         switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
1698         case IEEE80211_STYPE_ASSOC_RESP:
1699                 IEEE80211_DEBUG_MGMT("received ASSOCIATION RESPONSE (%d)\n",
1700                                      WLAN_FC_GET_STYPE(le16_to_cpu
1701                                                        (header->frame_ctl)));
1702                 ieee80211_handle_assoc_resp(ieee,
1703                                             (struct ieee80211_assoc_response *)
1704                                             header, stats);
1705                 break;
1706
1707         case IEEE80211_STYPE_REASSOC_RESP:
1708                 IEEE80211_DEBUG_MGMT("received REASSOCIATION RESPONSE (%d)\n",
1709                                      WLAN_FC_GET_STYPE(le16_to_cpu
1710                                                        (header->frame_ctl)));
1711                 break;
1712
1713         case IEEE80211_STYPE_PROBE_REQ:
1714                 IEEE80211_DEBUG_MGMT("received auth (%d)\n",
1715                                      WLAN_FC_GET_STYPE(le16_to_cpu
1716                                                        (header->frame_ctl)));
1717
1718                 if (ieee->handle_probe_request != NULL)
1719                         ieee->handle_probe_request(ieee->dev,
1720                                                    (struct
1721                                                     ieee80211_probe_request *)
1722                                                    header, stats);
1723                 break;
1724
1725         case IEEE80211_STYPE_PROBE_RESP:
1726                 IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
1727                                      WLAN_FC_GET_STYPE(le16_to_cpu
1728                                                        (header->frame_ctl)));
1729                 IEEE80211_DEBUG_SCAN("Probe response\n");
1730                 ieee80211_process_probe_response(ieee,
1731                                                  (struct
1732                                                   ieee80211_probe_response *)
1733                                                  header, stats);
1734                 break;
1735
1736         case IEEE80211_STYPE_BEACON:
1737                 IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
1738                                      WLAN_FC_GET_STYPE(le16_to_cpu
1739                                                        (header->frame_ctl)));
1740                 IEEE80211_DEBUG_SCAN("Beacon\n");
1741                 ieee80211_process_probe_response(ieee,
1742                                                  (struct
1743                                                   ieee80211_probe_response *)
1744                                                  header, stats);
1745                 break;
1746         case IEEE80211_STYPE_AUTH:
1747
1748                 IEEE80211_DEBUG_MGMT("received auth (%d)\n",
1749                                      WLAN_FC_GET_STYPE(le16_to_cpu
1750                                                        (header->frame_ctl)));
1751
1752                 if (ieee->handle_auth != NULL)
1753                         ieee->handle_auth(ieee->dev,
1754                                           (struct ieee80211_auth *)header);
1755                 break;
1756
1757         case IEEE80211_STYPE_DISASSOC:
1758                 if (ieee->handle_disassoc != NULL)
1759                         ieee->handle_disassoc(ieee->dev,
1760                                               (struct ieee80211_disassoc *)
1761                                               header);
1762                 break;
1763
1764         case IEEE80211_STYPE_ACTION:
1765                 IEEE80211_DEBUG_MGMT("ACTION\n");
1766                 if (ieee->handle_action)
1767                         ieee->handle_action(ieee->dev,
1768                                             (struct ieee80211_action *)
1769                                             header, stats);
1770                 break;
1771
1772         case IEEE80211_STYPE_REASSOC_REQ:
1773                 IEEE80211_DEBUG_MGMT("received reassoc (%d)\n",
1774                                      WLAN_FC_GET_STYPE(le16_to_cpu
1775                                                        (header->frame_ctl)));
1776
1777                 IEEE80211_DEBUG_MGMT("%s: IEEE80211_REASSOC_REQ received\n",
1778                                      ieee->dev->name);
1779                 if (ieee->handle_reassoc_request != NULL)
1780                         ieee->handle_reassoc_request(ieee->dev,
1781                                                     (struct ieee80211_reassoc_request *)
1782                                                      header);
1783                 break;
1784
1785         case IEEE80211_STYPE_ASSOC_REQ:
1786                 IEEE80211_DEBUG_MGMT("received assoc (%d)\n",
1787                                      WLAN_FC_GET_STYPE(le16_to_cpu
1788                                                        (header->frame_ctl)));
1789
1790                 IEEE80211_DEBUG_MGMT("%s: IEEE80211_ASSOC_REQ received\n",
1791                                      ieee->dev->name);
1792                 if (ieee->handle_assoc_request != NULL)
1793                         ieee->handle_assoc_request(ieee->dev);
1794                 break;
1795
1796         case IEEE80211_STYPE_DEAUTH:
1797                 IEEE80211_DEBUG_MGMT("DEAUTH\n");
1798                 if (ieee->handle_deauth != NULL)
1799                         ieee->handle_deauth(ieee->dev,
1800                                             (struct ieee80211_deauth *)
1801                                             header);
1802                 break;
1803         default:
1804                 IEEE80211_DEBUG_MGMT("received UNKNOWN (%d)\n",
1805                                      WLAN_FC_GET_STYPE(le16_to_cpu
1806                                                        (header->frame_ctl)));
1807                 IEEE80211_DEBUG_MGMT("%s: Unknown management packet: %d\n",
1808                                      ieee->dev->name,
1809                                      WLAN_FC_GET_STYPE(le16_to_cpu
1810                                                        (header->frame_ctl)));
1811                 break;
1812         }
1813 }
1814
1815 EXPORT_SYMBOL_GPL(ieee80211_rx_any);
1816 EXPORT_SYMBOL(ieee80211_rx_mgt);
1817 EXPORT_SYMBOL(ieee80211_rx);