git.oblomov.eu Git - linux-2.6/blob - drivers/net/wireless/ipw2x00/libipw_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/lib80211.h>
  36
  37 #include "ieee80211.h"
  38
  39 static void ieee80211_monitor_rx(struct ieee80211_device *ieee,
  40                                         struct sk_buff *skb,
  41                                         struct ieee80211_rx_stats *rx_stats)
  42 {
  43         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
  44         u16 fc = le16_to_cpu(hdr->frame_control);
  45
  46         skb->dev = ieee->dev;
  47         skb_reset_mac_header(skb);
  48         skb_pull(skb, ieee80211_get_hdrlen(fc));
  49         skb->pkt_type = PACKET_OTHERHOST;
  50         skb->protocol = htons(ETH_P_80211_RAW);
  51         memset(skb->cb, 0, sizeof(skb->cb));
  52         netif_rx(skb);
  53 }
  54
  55 /* Called only as a tasklet (software IRQ) */
  56 static struct ieee80211_frag_entry *ieee80211_frag_cache_find(struct
  57                                                               ieee80211_device
  58                                                               *ieee,
  59                                                               unsigned int seq,
  60                                                               unsigned int frag,
  61                                                               u8 * src,
  62                                                               u8 * dst)
  63 {
  64         struct ieee80211_frag_entry *entry;
  65         int i;
  66
  67         for (i = 0; i < IEEE80211_FRAG_CACHE_LEN; i++) {
  68                 entry = &ieee->frag_cache[i];
  69                 if (entry->skb != NULL &&
  70                     time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
  71                         IEEE80211_DEBUG_FRAG("expiring fragment cache entry "
  72                                              "seq=%u last_frag=%u\n",
  73                                              entry->seq, entry->last_frag);
  74                         dev_kfree_skb_any(entry->skb);
  75                         entry->skb = NULL;
  76                 }
  77
  78                 if (entry->skb != NULL && entry->seq == seq &&
  79                     (entry->last_frag + 1 == frag || frag == -1) &&
  80                     !compare_ether_addr(entry->src_addr, src) &&
  81                     !compare_ether_addr(entry->dst_addr, dst))
  82                         return entry;
  83         }
  84
  85         return NULL;
  86 }
  87
  88 /* Called only as a tasklet (software IRQ) */
  89 static struct sk_buff *ieee80211_frag_cache_get(struct ieee80211_device *ieee,
  90                                                 struct ieee80211_hdr_4addr *hdr)
  91 {
  92         struct sk_buff *skb = NULL;
  93         u16 sc;
  94         unsigned int frag, seq;
  95         struct ieee80211_frag_entry *entry;
  96
  97         sc = le16_to_cpu(hdr->seq_ctl);
  98         frag = WLAN_GET_SEQ_FRAG(sc);
  99         seq = WLAN_GET_SEQ_SEQ(sc);
 100
 101         if (frag == 0) {
 102                 /* Reserve enough space to fit maximum frame length */
 103                 skb = dev_alloc_skb(ieee->dev->mtu +
 104                                     sizeof(struct ieee80211_hdr_4addr) +
 105                                     8 /* LLC */  +
 106                                     2 /* alignment */  +
 107                                     8 /* WEP */  + ETH_ALEN /* WDS */ );
 108                 if (skb == NULL)
 109                         return NULL;
 110
 111                 entry = &ieee->frag_cache[ieee->frag_next_idx];
 112                 ieee->frag_next_idx++;
 113                 if (ieee->frag_next_idx >= IEEE80211_FRAG_CACHE_LEN)
 114                         ieee->frag_next_idx = 0;
 115
 116                 if (entry->skb != NULL)
 117                         dev_kfree_skb_any(entry->skb);
 118
 119                 entry->first_frag_time = jiffies;
 120                 entry->seq = seq;
 121                 entry->last_frag = frag;
 122                 entry->skb = skb;
 123                 memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
 124                 memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
 125         } else {
 126                 /* received a fragment of a frame for which the head fragment
 127                  * should have already been received */
 128                 entry = ieee80211_frag_cache_find(ieee, seq, frag, hdr->addr2,
 129                                                   hdr->addr1);
 130                 if (entry != NULL) {
 131                         entry->last_frag = frag;
 132                         skb = entry->skb;
 133                 }
 134         }
 135
 136         return skb;
 137 }
 138
 139 /* Called only as a tasklet (software IRQ) */
 140 static int ieee80211_frag_cache_invalidate(struct ieee80211_device *ieee,
 141                                            struct ieee80211_hdr_4addr *hdr)
 142 {
 143         u16 sc;
 144         unsigned int seq;
 145         struct ieee80211_frag_entry *entry;
 146
 147         sc = le16_to_cpu(hdr->seq_ctl);
 148         seq = WLAN_GET_SEQ_SEQ(sc);
 149
 150         entry = ieee80211_frag_cache_find(ieee, seq, -1, hdr->addr2,
 151                                           hdr->addr1);
 152
 153         if (entry == NULL) {
 154                 IEEE80211_DEBUG_FRAG("could not invalidate fragment cache "
 155                                      "entry (seq=%u)\n", seq);
 156                 return -1;
 157         }
 158
 159         entry->skb = NULL;
 160         return 0;
 161 }
 162
 163 #ifdef NOT_YET
 164 /* ieee80211_rx_frame_mgtmt
 165  *
 166  * Responsible for handling management control frames
 167  *
 168  * Called by ieee80211_rx */
 169 static int
 170 ieee80211_rx_frame_mgmt(struct ieee80211_device *ieee, struct sk_buff *skb,
 171                         struct ieee80211_rx_stats *rx_stats, u16 type,
 172                         u16 stype)
 173 {
 174         if (ieee->iw_mode == IW_MODE_MASTER) {
 175                 printk(KERN_DEBUG "%s: Master mode not yet suppported.\n",
 176                        ieee->dev->name);
 177                 return 0;
 178 /*
 179   hostap_update_sta_ps(ieee, (struct hostap_ieee80211_hdr_4addr *)
 180   skb->data);*/
 181         }
 182
 183         if (ieee->hostapd && type == WLAN_FC_TYPE_MGMT) {
 184                 if (stype == WLAN_FC_STYPE_BEACON &&
 185                     ieee->iw_mode == IW_MODE_MASTER) {
 186                         struct sk_buff *skb2;
 187                         /* Process beacon frames also in kernel driver to
 188                          * update STA(AP) table statistics */
 189                         skb2 = skb_clone(skb, GFP_ATOMIC);
 190                         if (skb2)
 191                                 hostap_rx(skb2->dev, skb2, rx_stats);
 192                 }
 193
 194                 /* send management frames to the user space daemon for
 195                  * processing */
 196                 ieee->apdevstats.rx_packets++;
 197                 ieee->apdevstats.rx_bytes += skb->len;
 198                 prism2_rx_80211(ieee->apdev, skb, rx_stats, PRISM2_RX_MGMT);
 199                 return 0;
 200         }
 201
 202         if (ieee->iw_mode == IW_MODE_MASTER) {
 203                 if (type != WLAN_FC_TYPE_MGMT && type != WLAN_FC_TYPE_CTRL) {
 204                         printk(KERN_DEBUG "%s: unknown management frame "
 205                                "(type=0x%02x, stype=0x%02x) dropped\n",
 206                                skb->dev->name, type, stype);
 207                         return -1;
 208                 }
 209
 210                 hostap_rx(skb->dev, skb, rx_stats);
 211                 return 0;
 212         }
 213
 214         printk(KERN_DEBUG "%s: hostap_rx_frame_mgmt: management frame "
 215                "received in non-Host AP mode\n", skb->dev->name);
 216         return -1;
 217 }
 218 #endif
 219
 220 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
 221 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
 222 static unsigned char rfc1042_header[] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
 223
 224 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
 225 static unsigned char bridge_tunnel_header[] =
 226     { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
 227 /* No encapsulation header if EtherType < 0x600 (=length) */
 228
 229 /* Called by ieee80211_rx_frame_decrypt */
 230 static int ieee80211_is_eapol_frame(struct ieee80211_device *ieee,
 231                                     struct sk_buff *skb)
 232 {
 233         struct net_device *dev = ieee->dev;
 234         u16 fc, ethertype;
 235         struct ieee80211_hdr_3addr *hdr;
 236         u8 *pos;
 237
 238         if (skb->len < 24)
 239                 return 0;
 240
 241         hdr = (struct ieee80211_hdr_3addr *)skb->data;
 242         fc = le16_to_cpu(hdr->frame_ctl);
 243
 244         /* check that the frame is unicast frame to us */
 245         if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 246             IEEE80211_FCTL_TODS &&
 247             !compare_ether_addr(hdr->addr1, dev->dev_addr) &&
 248             !compare_ether_addr(hdr->addr3, dev->dev_addr)) {
 249                 /* ToDS frame with own addr BSSID and DA */
 250         } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 251                    IEEE80211_FCTL_FROMDS &&
 252                    !compare_ether_addr(hdr->addr1, dev->dev_addr)) {
 253                 /* FromDS frame with own addr as DA */
 254         } else
 255                 return 0;
 256
 257         if (skb->len < 24 + 8)
 258                 return 0;
 259
 260         /* check for port access entity Ethernet type */
 261         pos = skb->data + 24;
 262         ethertype = (pos[6] << 8) | pos[7];
 263         if (ethertype == ETH_P_PAE)
 264                 return 1;
 265
 266         return 0;
 267 }
 268
 269 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
 270 static int
 271 ieee80211_rx_frame_decrypt(struct ieee80211_device *ieee, struct sk_buff *skb,
 272                            struct lib80211_crypt_data *crypt)
 273 {
 274         struct ieee80211_hdr_3addr *hdr;
 275         int res, hdrlen;
 276
 277         if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
 278                 return 0;
 279
 280         hdr = (struct ieee80211_hdr_3addr *)skb->data;
 281         hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 282
 283         atomic_inc(&crypt->refcnt);
 284         res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
 285         atomic_dec(&crypt->refcnt);
 286         if (res < 0) {
 287                 IEEE80211_DEBUG_DROP("decryption failed (SA=%pM) res=%d\n",
 288                                      hdr->addr2, res);
 289                 if (res == -2)
 290                         IEEE80211_DEBUG_DROP("Decryption failed ICV "
 291                                              "mismatch (key %d)\n",
 292                                              skb->data[hdrlen + 3] >> 6);
 293                 ieee->ieee_stats.rx_discards_undecryptable++;
 294                 return -1;
 295         }
 296
 297         return res;
 298 }
 299
 300 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
 301 static int
 302 ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device *ieee,
 303                                 struct sk_buff *skb, int keyidx,
 304                                 struct lib80211_crypt_data *crypt)
 305 {
 306         struct ieee80211_hdr_3addr *hdr;
 307         int res, hdrlen;
 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=%pM keyidx=%d)\n", ieee->dev->name, hdr->addr2,
 321                        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         unsigned int frag;
 339         u8 *payload;
 340         u16 ethertype;
 341 #ifdef NOT_YET
 342         struct net_device *wds = NULL;
 343         struct sk_buff *skb2 = NULL;
 344         struct net_device *wds = NULL;
 345         int frame_authorized = 0;
 346         int from_assoc_ap = 0;
 347         void *sta = NULL;
 348 #endif
 349         u8 dst[ETH_ALEN];
 350         u8 src[ETH_ALEN];
 351         struct lib80211_crypt_data *crypt = NULL;
 352         int keyidx = 0;
 353         int can_be_decrypted = 0;
 354
 355         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 356         if (skb->len < 10) {
 357                 printk(KERN_INFO "%s: SKB length < 10\n", dev->name);
 358                 goto rx_dropped;
 359         }
 360
 361         fc = le16_to_cpu(hdr->frame_ctl);
 362         type = WLAN_FC_GET_TYPE(fc);
 363         stype = WLAN_FC_GET_STYPE(fc);
 364         sc = le16_to_cpu(hdr->seq_ctl);
 365         frag = WLAN_GET_SEQ_FRAG(sc);
 366         hdrlen = ieee80211_get_hdrlen(fc);
 367
 368         if (skb->len < hdrlen) {
 369                 printk(KERN_INFO "%s: invalid SKB length %d\n",
 370                         dev->name, skb->len);
 371                 goto rx_dropped;
 372         }
 373
 374         /* Put this code here so that we avoid duplicating it in all
 375          * Rx paths. - Jean II */
 376 #ifdef CONFIG_WIRELESS_EXT
 377 #ifdef IW_WIRELESS_SPY          /* defined in iw_handler.h */
 378         /* If spy monitoring on */
 379         if (ieee->spy_data.spy_number > 0) {
 380                 struct iw_quality wstats;
 381
 382                 wstats.updated = 0;
 383                 if (rx_stats->mask & IEEE80211_STATMASK_RSSI) {
 384                         wstats.level = rx_stats->signal;
 385                         wstats.updated |= IW_QUAL_LEVEL_UPDATED;
 386                 } else
 387                         wstats.updated |= IW_QUAL_LEVEL_INVALID;
 388
 389                 if (rx_stats->mask & IEEE80211_STATMASK_NOISE) {
 390                         wstats.noise = rx_stats->noise;
 391                         wstats.updated |= IW_QUAL_NOISE_UPDATED;
 392                 } else
 393                         wstats.updated |= IW_QUAL_NOISE_INVALID;
 394
 395                 if (rx_stats->mask & IEEE80211_STATMASK_SIGNAL) {
 396                         wstats.qual = rx_stats->signal;
 397                         wstats.updated |= IW_QUAL_QUAL_UPDATED;
 398                 } else
 399                         wstats.updated |= IW_QUAL_QUAL_INVALID;
 400
 401                 /* Update spy records */
 402                 wireless_spy_update(ieee->dev, hdr->addr2, &wstats);
 403         }
 404 #endif                          /* IW_WIRELESS_SPY */
 405 #endif                          /* CONFIG_WIRELESS_EXT */
 406
 407 #ifdef NOT_YET
 408         hostap_update_rx_stats(local->ap, hdr, rx_stats);
 409 #endif
 410
 411         if (ieee->iw_mode == IW_MODE_MONITOR) {
 412                 dev->stats.rx_packets++;
 413                 dev->stats.rx_bytes += skb->len;
 414                 ieee80211_monitor_rx(ieee, skb, rx_stats);
 415                 return 1;
 416         }
 417
 418         can_be_decrypted = (is_multicast_ether_addr(hdr->addr1) ||
 419                             is_broadcast_ether_addr(hdr->addr2)) ?
 420             ieee->host_mc_decrypt : ieee->host_decrypt;
 421
 422         if (can_be_decrypted) {
 423                 if (skb->len >= hdrlen + 3) {
 424                         /* Top two-bits of byte 3 are the key index */
 425                         keyidx = skb->data[hdrlen + 3] >> 6;
 426                 }
 427
 428                 /* ieee->crypt[] is WEP_KEY (4) in length.  Given that keyidx
 429                  * is only allowed 2-bits of storage, no value of keyidx can
 430                  * be provided via above code that would result in keyidx
 431                  * being out of range */
 432                 crypt = ieee->crypt_info.crypt[keyidx];
 433
 434 #ifdef NOT_YET
 435                 sta = NULL;
 436
 437                 /* Use station specific key to override default keys if the
 438                  * receiver address is a unicast address ("individual RA"). If
 439                  * bcrx_sta_key parameter is set, station specific key is used
 440                  * even with broad/multicast targets (this is against IEEE
 441                  * 802.11, but makes it easier to use different keys with
 442                  * stations that do not support WEP key mapping). */
 443
 444                 if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key)
 445                         (void)hostap_handle_sta_crypto(local, hdr, &crypt,
 446                                                        &sta);
 447 #endif
 448
 449                 /* allow NULL decrypt to indicate an station specific override
 450                  * for default encryption */
 451                 if (crypt && (crypt->ops == NULL ||
 452                               crypt->ops->decrypt_mpdu == NULL))
 453                         crypt = NULL;
 454
 455                 if (!crypt && (fc & IEEE80211_FCTL_PROTECTED)) {
 456                         /* This seems to be triggered by some (multicast?)
 457                          * frames from other than current BSS, so just drop the
 458                          * frames silently instead of filling system log with
 459                          * these reports. */
 460                         IEEE80211_DEBUG_DROP("Decryption failed (not set)"
 461                                              " (SA=%pM)\n", hdr->addr2);
 462                         ieee->ieee_stats.rx_discards_undecryptable++;
 463                         goto rx_dropped;
 464                 }
 465         }
 466 #ifdef NOT_YET
 467         if (type != WLAN_FC_TYPE_DATA) {
 468                 if (type == WLAN_FC_TYPE_MGMT && stype == WLAN_FC_STYPE_AUTH &&
 469                     fc & IEEE80211_FCTL_PROTECTED && ieee->host_decrypt &&
 470                     (keyidx = hostap_rx_frame_decrypt(ieee, skb, crypt)) < 0) {
 471                         printk(KERN_DEBUG "%s: failed to decrypt mgmt::auth "
 472                                "from %pM\n", dev->name, hdr->addr2);
 473                         /* TODO: could inform hostapd about this so that it
 474                          * could send auth failure report */
 475                         goto rx_dropped;
 476                 }
 477
 478                 if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
 479                         goto rx_dropped;
 480                 else
 481                         goto rx_exit;
 482         }
 483 #endif
 484         /* drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.29) */
 485         if (sc == ieee->prev_seq_ctl)
 486                 goto rx_dropped;
 487         else
 488                 ieee->prev_seq_ctl = sc;
 489
 490         /* Data frame - extract src/dst addresses */
 491         if (skb->len < IEEE80211_3ADDR_LEN)
 492                 goto rx_dropped;
 493
 494         switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
 495         case IEEE80211_FCTL_FROMDS:
 496                 memcpy(dst, hdr->addr1, ETH_ALEN);
 497                 memcpy(src, hdr->addr3, ETH_ALEN);
 498                 break;
 499         case IEEE80211_FCTL_TODS:
 500                 memcpy(dst, hdr->addr3, ETH_ALEN);
 501                 memcpy(src, hdr->addr2, ETH_ALEN);
 502                 break;
 503         case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
 504                 if (skb->len < IEEE80211_4ADDR_LEN)
 505                         goto rx_dropped;
 506                 memcpy(dst, hdr->addr3, ETH_ALEN);
 507                 memcpy(src, hdr->addr4, ETH_ALEN);
 508                 break;
 509         case 0:
 510                 memcpy(dst, hdr->addr1, ETH_ALEN);
 511                 memcpy(src, hdr->addr2, ETH_ALEN);
 512                 break;
 513         }
 514
 515 #ifdef NOT_YET
 516         if (hostap_rx_frame_wds(ieee, hdr, fc, &wds))
 517                 goto rx_dropped;
 518         if (wds) {
 519                 skb->dev = dev = wds;
 520                 stats = hostap_get_stats(dev);
 521         }
 522
 523         if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
 524             (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 525             IEEE80211_FCTL_FROMDS && ieee->stadev
 526             && !compare_ether_addr(hdr->addr2, ieee->assoc_ap_addr)) {
 527                 /* Frame from BSSID of the AP for which we are a client */
 528                 skb->dev = dev = ieee->stadev;
 529                 stats = hostap_get_stats(dev);
 530                 from_assoc_ap = 1;
 531         }
 532 #endif
 533
 534 #ifdef NOT_YET
 535         if ((ieee->iw_mode == IW_MODE_MASTER ||
 536              ieee->iw_mode == IW_MODE_REPEAT) && !from_assoc_ap) {
 537                 switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats,
 538                                              wds != NULL)) {
 539                 case AP_RX_CONTINUE_NOT_AUTHORIZED:
 540                         frame_authorized = 0;
 541                         break;
 542                 case AP_RX_CONTINUE:
 543                         frame_authorized = 1;
 544                         break;
 545                 case AP_RX_DROP:
 546                         goto rx_dropped;
 547                 case AP_RX_EXIT:
 548                         goto rx_exit;
 549                 }
 550         }
 551 #endif
 552
 553         /* Nullfunc frames may have PS-bit set, so they must be passed to
 554          * hostap_handle_sta_rx() before being dropped here. */
 555
 556         stype &= ~IEEE80211_STYPE_QOS_DATA;
 557
 558         if (stype != IEEE80211_STYPE_DATA &&
 559             stype != IEEE80211_STYPE_DATA_CFACK &&
 560             stype != IEEE80211_STYPE_DATA_CFPOLL &&
 561             stype != IEEE80211_STYPE_DATA_CFACKPOLL) {
 562                 if (stype != IEEE80211_STYPE_NULLFUNC)
 563                         IEEE80211_DEBUG_DROP("RX: dropped data frame "
 564                                              "with no data (type=0x%02x, "
 565                                              "subtype=0x%02x, len=%d)\n",
 566                                              type, stype, skb->len);
 567                 goto rx_dropped;
 568         }
 569
 570         /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
 571
 572         if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
 573             (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0)
 574                 goto rx_dropped;
 575
 576         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 577
 578         /* skb: hdr + (possibly fragmented) plaintext payload */
 579         // PR: FIXME: hostap has additional conditions in the "if" below:
 580         // ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
 581         if ((frag != 0) || (fc & IEEE80211_FCTL_MOREFRAGS)) {
 582                 int flen;
 583                 struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr);
 584                 IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
 585
 586                 if (!frag_skb) {
 587                         IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG,
 588                                         "Rx cannot get skb from fragment "
 589                                         "cache (morefrag=%d seq=%u frag=%u)\n",
 590                                         (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
 591                                         WLAN_GET_SEQ_SEQ(sc), frag);
 592                         goto rx_dropped;
 593                 }
 594
 595                 flen = skb->len;
 596                 if (frag != 0)
 597                         flen -= hdrlen;
 598
 599                 if (frag_skb->tail + flen > frag_skb->end) {
 600                         printk(KERN_WARNING "%s: host decrypted and "
 601                                "reassembled frame did not fit skb\n",
 602                                dev->name);
 603                         ieee80211_frag_cache_invalidate(ieee, hdr);
 604                         goto rx_dropped;
 605                 }
 606
 607                 if (frag == 0) {
 608                         /* copy first fragment (including full headers) into
 609                          * beginning of the fragment cache skb */
 610                         skb_copy_from_linear_data(skb, skb_put(frag_skb, flen), flen);
 611                 } else {
 612                         /* append frame payload to the end of the fragment
 613                          * cache skb */
 614                         skb_copy_from_linear_data_offset(skb, hdrlen,
 615                                       skb_put(frag_skb, flen), flen);
 616                 }
 617                 dev_kfree_skb_any(skb);
 618                 skb = NULL;
 619
 620                 if (fc & IEEE80211_FCTL_MOREFRAGS) {
 621                         /* more fragments expected - leave the skb in fragment
 622                          * cache for now; it will be delivered to upper layers
 623                          * after all fragments have been received */
 624                         goto rx_exit;
 625                 }
 626
 627                 /* this was the last fragment and the frame will be
 628                  * delivered, so remove skb from fragment cache */
 629                 skb = frag_skb;
 630                 hdr = (struct ieee80211_hdr_4addr *)skb->data;
 631                 ieee80211_frag_cache_invalidate(ieee, hdr);
 632         }
 633
 634         /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
 635          * encrypted/authenticated */
 636         if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
 637             ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
 638                 goto rx_dropped;
 639
 640         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 641         if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep) {
 642                 if (            /*ieee->ieee802_1x && */
 643                            ieee80211_is_eapol_frame(ieee, skb)) {
 644                         /* pass unencrypted EAPOL frames even if encryption is
 645                          * configured */
 646                 } else {
 647                         IEEE80211_DEBUG_DROP("encryption configured, but RX "
 648                                              "frame not encrypted (SA=%pM)\n",
 649                                              hdr->addr2);
 650                         goto rx_dropped;
 651                 }
 652         }
 653
 654         if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep &&
 655             !ieee80211_is_eapol_frame(ieee, skb)) {
 656                 IEEE80211_DEBUG_DROP("dropped unencrypted RX data "
 657                                      "frame from %pM (drop_unencrypted=1)\n",
 658                                      hdr->addr2);
 659                 goto rx_dropped;
 660         }
 661
 662         /* If the frame was decrypted in hardware, we may need to strip off
 663          * any security data (IV, ICV, etc) that was left behind */
 664         if (!can_be_decrypted && (fc & IEEE80211_FCTL_PROTECTED) &&
 665             ieee->host_strip_iv_icv) {
 666                 int trimlen = 0;
 667
 668                 /* Top two-bits of byte 3 are the key index */
 669                 if (skb->len >= hdrlen + 3)
 670                         keyidx = skb->data[hdrlen + 3] >> 6;
 671
 672                 /* To strip off any security data which appears before the
 673                  * payload, we simply increase hdrlen (as the header gets
 674                  * chopped off immediately below). For the security data which
 675                  * appears after the payload, we use skb_trim. */
 676
 677                 switch (ieee->sec.encode_alg[keyidx]) {
 678                 case SEC_ALG_WEP:
 679                         /* 4 byte IV */
 680                         hdrlen += 4;
 681                         /* 4 byte ICV */
 682                         trimlen = 4;
 683                         break;
 684                 case SEC_ALG_TKIP:
 685                         /* 4 byte IV, 4 byte ExtIV */
 686                         hdrlen += 8;
 687                         /* 8 byte MIC, 4 byte ICV */
 688                         trimlen = 12;
 689                         break;
 690                 case SEC_ALG_CCMP:
 691                         /* 8 byte CCMP header */
 692                         hdrlen += 8;
 693                         /* 8 byte MIC */
 694                         trimlen = 8;
 695                         break;
 696                 }
 697
 698                 if (skb->len < trimlen)
 699                         goto rx_dropped;
 700
 701                 __skb_trim(skb, skb->len - trimlen);
 702
 703                 if (skb->len < hdrlen)
 704                         goto rx_dropped;
 705         }
 706
 707         /* skb: hdr + (possible reassembled) full plaintext payload */
 708
 709         payload = skb->data + hdrlen;
 710         ethertype = (payload[6] << 8) | payload[7];
 711
 712 #ifdef NOT_YET
 713         /* If IEEE 802.1X is used, check whether the port is authorized to send
 714          * the received frame. */
 715         if (ieee->ieee802_1x && ieee->iw_mode == IW_MODE_MASTER) {
 716                 if (ethertype == ETH_P_PAE) {
 717                         printk(KERN_DEBUG "%s: RX: IEEE 802.1X frame\n",
 718                                dev->name);
 719                         if (ieee->hostapd && ieee->apdev) {
 720                                 /* Send IEEE 802.1X frames to the user
 721                                  * space daemon for processing */
 722                                 prism2_rx_80211(ieee->apdev, skb, rx_stats,
 723                                                 PRISM2_RX_MGMT);
 724                                 ieee->apdevstats.rx_packets++;
 725                                 ieee->apdevstats.rx_bytes += skb->len;
 726                                 goto rx_exit;
 727                         }
 728                 } else if (!frame_authorized) {
 729                         printk(KERN_DEBUG "%s: dropped frame from "
 730                                "unauthorized port (IEEE 802.1X): "
 731                                "ethertype=0x%04x\n", dev->name, ethertype);
 732                         goto rx_dropped;
 733                 }
 734         }
 735 #endif
 736
 737         /* convert hdr + possible LLC headers into Ethernet header */
 738         if (skb->len - hdrlen >= 8 &&
 739             ((memcmp(payload, rfc1042_header, SNAP_SIZE) == 0 &&
 740               ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
 741              memcmp(payload, bridge_tunnel_header, SNAP_SIZE) == 0)) {
 742                 /* remove RFC1042 or Bridge-Tunnel encapsulation and
 743                  * replace EtherType */
 744                 skb_pull(skb, hdrlen + SNAP_SIZE);
 745                 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
 746                 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
 747         } else {
 748                 __be16 len;
 749                 /* Leave Ethernet header part of hdr and full payload */
 750                 skb_pull(skb, hdrlen);
 751                 len = htons(skb->len);
 752                 memcpy(skb_push(skb, 2), &len, 2);
 753                 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
 754                 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
 755         }
 756
 757 #ifdef NOT_YET
 758         if (wds && ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 759                     IEEE80211_FCTL_TODS) && skb->len >= ETH_HLEN + ETH_ALEN) {
 760                 /* Non-standard frame: get addr4 from its bogus location after
 761                  * the payload */
 762                 skb_copy_to_linear_data_offset(skb, ETH_ALEN,
 763                                                skb->data + skb->len - ETH_ALEN,
 764                                                ETH_ALEN);
 765                 skb_trim(skb, skb->len - ETH_ALEN);
 766         }
 767 #endif
 768
 769         dev->stats.rx_packets++;
 770         dev->stats.rx_bytes += skb->len;
 771
 772 #ifdef NOT_YET
 773         if (ieee->iw_mode == IW_MODE_MASTER && !wds && ieee->ap->bridge_packets) {
 774                 if (dst[0] & 0x01) {
 775                         /* copy multicast frame both to the higher layers and
 776                          * to the wireless media */
 777                         ieee->ap->bridged_multicast++;
 778                         skb2 = skb_clone(skb, GFP_ATOMIC);
 779                         if (skb2 == NULL)
 780                                 printk(KERN_DEBUG "%s: skb_clone failed for "
 781                                        "multicast frame\n", dev->name);
 782                 } else if (hostap_is_sta_assoc(ieee->ap, dst)) {
 783                         /* send frame directly to the associated STA using
 784                          * wireless media and not passing to higher layers */
 785                         ieee->ap->bridged_unicast++;
 786                         skb2 = skb;
 787                         skb = NULL;
 788                 }
 789         }
 790
 791         if (skb2 != NULL) {
 792                 /* send to wireless media */
 793                 skb2->dev = dev;
 794                 skb2->protocol = htons(ETH_P_802_3);
 795                 skb_reset_mac_header(skb2);
 796                 skb_reset_network_header(skb2);
 797                 /* skb2->network_header += ETH_HLEN; */
 798                 dev_queue_xmit(skb2);
 799         }
 800 #endif
 801
 802         if (skb) {
 803                 skb->protocol = eth_type_trans(skb, dev);
 804                 memset(skb->cb, 0, sizeof(skb->cb));
 805                 skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
 806                 if (netif_rx(skb) == NET_RX_DROP) {
 807                         /* netif_rx always succeeds, but it might drop
 808                          * the packet.  If it drops the packet, we log that
 809                          * in our stats. */
 810                         IEEE80211_DEBUG_DROP
 811                             ("RX: netif_rx dropped the packet\n");
 812                         dev->stats.rx_dropped++;
 813                 }
 814         }
 815
 816       rx_exit:
 817 #ifdef NOT_YET
 818         if (sta)
 819                 hostap_handle_sta_release(sta);
 820 #endif
 821         return 1;
 822
 823       rx_dropped:
 824         dev->stats.rx_dropped++;
 825
 826         /* Returning 0 indicates to caller that we have not handled the SKB--
 827          * so it is still allocated and can be used again by underlying
 828          * hardware as a DMA target */
 829         return 0;
 830 }
 831
 832 /* Filter out unrelated packets, call ieee80211_rx[_mgt]
 833  * This function takes over the skb, it should not be used again after calling
 834  * this function. */
 835 void ieee80211_rx_any(struct ieee80211_device *ieee,
 836                      struct sk_buff *skb, struct ieee80211_rx_stats *stats)
 837 {
 838         struct ieee80211_hdr_4addr *hdr;
 839         int is_packet_for_us;
 840         u16 fc;
 841
 842         if (ieee->iw_mode == IW_MODE_MONITOR) {
 843                 if (!ieee80211_rx(ieee, skb, stats))
 844                         dev_kfree_skb_irq(skb);
 845                 return;
 846         }
 847
 848         if (skb->len < sizeof(struct ieee80211_hdr))
 849                 goto drop_free;
 850
 851         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 852         fc = le16_to_cpu(hdr->frame_ctl);
 853
 854         if ((fc & IEEE80211_FCTL_VERS) != 0)
 855                 goto drop_free;
 856
 857         switch (fc & IEEE80211_FCTL_FTYPE) {
 858         case IEEE80211_FTYPE_MGMT:
 859                 if (skb->len < sizeof(struct ieee80211_hdr_3addr))
 860                         goto drop_free;
 861                 ieee80211_rx_mgt(ieee, hdr, stats);
 862                 dev_kfree_skb_irq(skb);
 863                 return;
 864         case IEEE80211_FTYPE_DATA:
 865                 break;
 866         case IEEE80211_FTYPE_CTL:
 867                 return;
 868         default:
 869                 return;
 870         }
 871
 872         is_packet_for_us = 0;
 873         switch (ieee->iw_mode) {
 874         case IW_MODE_ADHOC:
 875                 /* our BSS and not from/to DS */
 876                 if (memcmp(hdr->addr3, ieee->bssid, ETH_ALEN) == 0)
 877                 if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == 0) {
 878                         /* promisc: get all */
 879                         if (ieee->dev->flags & IFF_PROMISC)
 880                                 is_packet_for_us = 1;
 881                         /* to us */
 882                         else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0)
 883                                 is_packet_for_us = 1;
 884                         /* mcast */
 885                         else if (is_multicast_ether_addr(hdr->addr1))
 886                                 is_packet_for_us = 1;
 887                 }
 888                 break;
 889         case IW_MODE_INFRA:
 890                 /* our BSS (== from our AP) and from DS */
 891                 if (memcmp(hdr->addr2, ieee->bssid, ETH_ALEN) == 0)
 892                 if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS) {
 893                         /* promisc: get all */
 894                         if (ieee->dev->flags & IFF_PROMISC)
 895                                 is_packet_for_us = 1;
 896                         /* to us */
 897                         else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0)
 898                                 is_packet_for_us = 1;
 899                         /* mcast */
 900                         else if (is_multicast_ether_addr(hdr->addr1)) {
 901                                 /* not our own packet bcasted from AP */
 902                                 if (memcmp(hdr->addr3, ieee->dev->dev_addr, ETH_ALEN))
 903                                         is_packet_for_us = 1;
 904                         }
 905                 }
 906                 break;
 907         default:
 908                 /* ? */
 909                 break;
 910         }
 911
 912         if (is_packet_for_us)
 913                 if (!ieee80211_rx(ieee, skb, stats))
 914                         dev_kfree_skb_irq(skb);
 915         return;
 916
 917 drop_free:
 918         dev_kfree_skb_irq(skb);
 919         ieee->dev->stats.rx_dropped++;
 920         return;
 921 }
 922
 923 #define MGMT_FRAME_FIXED_PART_LENGTH            0x24
 924
 925 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
 926
 927 /*
 928 * Make ther structure we read from the beacon packet has
 929 * the right values
 930 */
 931 static int ieee80211_verify_qos_info(struct ieee80211_qos_information_element
 932                                      *info_element, int sub_type)
 933 {
 934
 935         if (info_element->qui_subtype != sub_type)
 936                 return -1;
 937         if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
 938                 return -1;
 939         if (info_element->qui_type != QOS_OUI_TYPE)
 940                 return -1;
 941         if (info_element->version != QOS_VERSION_1)
 942                 return -1;
 943
 944         return 0;
 945 }
 946
 947 /*
 948  * Parse a QoS parameter element
 949  */
 950 static int ieee80211_read_qos_param_element(struct ieee80211_qos_parameter_info
 951                                             *element_param, struct ieee80211_info_element
 952                                             *info_element)
 953 {
 954         int ret = 0;
 955         u16 size = sizeof(struct ieee80211_qos_parameter_info) - 2;
 956
 957         if ((info_element == NULL) || (element_param == NULL))
 958                 return -1;
 959
 960         if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
 961                 memcpy(element_param->info_element.qui, info_element->data,
 962                        info_element->len);
 963                 element_param->info_element.elementID = info_element->id;
 964                 element_param->info_element.length = info_element->len;
 965         } else
 966                 ret = -1;
 967         if (ret == 0)
 968                 ret = ieee80211_verify_qos_info(&element_param->info_element,
 969                                                 QOS_OUI_PARAM_SUB_TYPE);
 970         return ret;
 971 }
 972
 973 /*
 974  * Parse a QoS information element
 975  */
 976 static int ieee80211_read_qos_info_element(struct
 977                                            ieee80211_qos_information_element
 978                                            *element_info, struct ieee80211_info_element
 979                                            *info_element)
 980 {
 981         int ret = 0;
 982         u16 size = sizeof(struct ieee80211_qos_information_element) - 2;
 983
 984         if (element_info == NULL)
 985                 return -1;
 986         if (info_element == NULL)
 987                 return -1;
 988
 989         if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
 990                 memcpy(element_info->qui, info_element->data,
 991                        info_element->len);
 992                 element_info->elementID = info_element->id;
 993                 element_info->length = info_element->len;
 994         } else
 995                 ret = -1;
 996
 997         if (ret == 0)
 998                 ret = ieee80211_verify_qos_info(element_info,
 999                                                 QOS_OUI_INFO_SUB_TYPE);
1000         return ret;
1001 }
1002
1003 /*
1004  * Write QoS parameters from the ac parameters.
1005  */
1006 static int ieee80211_qos_convert_ac_to_parameters(struct
1007                                                   ieee80211_qos_parameter_info
1008                                                   *param_elm, struct
1009                                                   ieee80211_qos_parameters
1010                                                   *qos_param)
1011 {
1012         int rc = 0;
1013         int i;
1014         struct ieee80211_qos_ac_parameter *ac_params;
1015         u32 txop;
1016         u8 cw_min;
1017         u8 cw_max;
1018
1019         for (i = 0; i < QOS_QUEUE_NUM; i++) {
1020                 ac_params = &(param_elm->ac_params_record[i]);
1021
1022                 qos_param->aifs[i] = (ac_params->aci_aifsn) & 0x0F;
1023                 qos_param->aifs[i] -= (qos_param->aifs[i] < 2) ? 0 : 2;
1024
1025                 cw_min = ac_params->ecw_min_max & 0x0F;
1026                 qos_param->cw_min[i] = cpu_to_le16((1 << cw_min) - 1);
1027
1028                 cw_max = (ac_params->ecw_min_max & 0xF0) >> 4;
1029                 qos_param->cw_max[i] = cpu_to_le16((1 << cw_max) - 1);
1030
1031                 qos_param->flag[i] =
1032                     (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1033
1034                 txop = le16_to_cpu(ac_params->tx_op_limit) * 32;
1035                 qos_param->tx_op_limit[i] = cpu_to_le16(txop);
1036         }
1037         return rc;
1038 }
1039
1040 /*
1041  * we have a generic data element which it may contain QoS information or
1042  * parameters element. check the information element length to decide
1043  * which type to read
1044  */
1045 static int ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element
1046                                              *info_element,
1047                                              struct ieee80211_network *network)
1048 {
1049         int rc = 0;
1050         struct ieee80211_qos_parameters *qos_param = NULL;
1051         struct ieee80211_qos_information_element qos_info_element;
1052
1053         rc = ieee80211_read_qos_info_element(&qos_info_element, info_element);
1054
1055         if (rc == 0) {
1056                 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1057                 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1058         } else {
1059                 struct ieee80211_qos_parameter_info param_element;
1060
1061                 rc = ieee80211_read_qos_param_element(&param_element,
1062                                                       info_element);
1063                 if (rc == 0) {
1064                         qos_param = &(network->qos_data.parameters);
1065                         ieee80211_qos_convert_ac_to_parameters(&param_element,
1066                                                                qos_param);
1067                         network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1068                         network->qos_data.param_count =
1069                             param_element.info_element.ac_info & 0x0F;
1070                 }
1071         }
1072
1073         if (rc == 0) {
1074                 IEEE80211_DEBUG_QOS("QoS is supported\n");
1075                 network->qos_data.supported = 1;
1076         }
1077         return rc;
1078 }
1079
1080 #ifdef CONFIG_LIBIPW_DEBUG
1081 #define MFIE_STRING(x) case WLAN_EID_ ##x: return #x
1082
1083 static const char *get_info_element_string(u16 id)
1084 {
1085         switch (id) {
1086                 MFIE_STRING(SSID);
1087                 MFIE_STRING(SUPP_RATES);
1088                 MFIE_STRING(FH_PARAMS);
1089                 MFIE_STRING(DS_PARAMS);
1090                 MFIE_STRING(CF_PARAMS);
1091                 MFIE_STRING(TIM);
1092                 MFIE_STRING(IBSS_PARAMS);
1093                 MFIE_STRING(COUNTRY);
1094                 MFIE_STRING(HP_PARAMS);
1095                 MFIE_STRING(HP_TABLE);
1096                 MFIE_STRING(REQUEST);
1097                 MFIE_STRING(CHALLENGE);
1098                 MFIE_STRING(PWR_CONSTRAINT);
1099                 MFIE_STRING(PWR_CAPABILITY);
1100                 MFIE_STRING(TPC_REQUEST);
1101                 MFIE_STRING(TPC_REPORT);
1102                 MFIE_STRING(SUPPORTED_CHANNELS);
1103                 MFIE_STRING(CHANNEL_SWITCH);
1104                 MFIE_STRING(MEASURE_REQUEST);
1105                 MFIE_STRING(MEASURE_REPORT);
1106                 MFIE_STRING(QUIET);
1107                 MFIE_STRING(IBSS_DFS);
1108                 MFIE_STRING(ERP_INFO);
1109                 MFIE_STRING(RSN);
1110                 MFIE_STRING(EXT_SUPP_RATES);
1111                 MFIE_STRING(GENERIC);
1112                 MFIE_STRING(QOS_PARAMETER);
1113         default:
1114                 return "UNKNOWN";
1115         }
1116 }
1117 #endif
1118
1119 static int ieee80211_parse_info_param(struct ieee80211_info_element
1120                                       *info_element, u16 length,
1121                                       struct ieee80211_network *network)
1122 {
1123         DECLARE_SSID_BUF(ssid);
1124         u8 i;
1125 #ifdef CONFIG_LIBIPW_DEBUG
1126         char rates_str[64];
1127         char *p;
1128 #endif
1129
1130         while (length >= sizeof(*info_element)) {
1131                 if (sizeof(*info_element) + info_element->len > length) {
1132                         IEEE80211_DEBUG_MGMT("Info elem: parse failed: "
1133                                              "info_element->len + 2 > left : "
1134                                              "info_element->len+2=%zd left=%d, id=%d.\n",
1135                                              info_element->len +
1136                                              sizeof(*info_element),
1137                                              length, info_element->id);
1138                         /* We stop processing but don't return an error here
1139                          * because some misbehaviour APs break this rule. ie.
1140                          * Orinoco AP1000. */
1141                         break;
1142                 }
1143
1144                 switch (info_element->id) {
1145                 case WLAN_EID_SSID:
1146                         network->ssid_len = min(info_element->len,
1147                                                 (u8) IW_ESSID_MAX_SIZE);
1148                         memcpy(network->ssid, info_element->data,
1149                                network->ssid_len);
1150                         if (network->ssid_len < IW_ESSID_MAX_SIZE)
1151                                 memset(network->ssid + network->ssid_len, 0,
1152                                        IW_ESSID_MAX_SIZE - network->ssid_len);
1153
1154                         IEEE80211_DEBUG_MGMT("WLAN_EID_SSID: '%s' len=%d.\n",
1155                                              print_ssid(ssid, network->ssid,
1156                                                         network->ssid_len),
1157                                              network->ssid_len);
1158                         break;
1159
1160                 case WLAN_EID_SUPP_RATES:
1161 #ifdef CONFIG_LIBIPW_DEBUG
1162                         p = rates_str;
1163 #endif
1164                         network->rates_len = min(info_element->len,
1165                                                  MAX_RATES_LENGTH);
1166                         for (i = 0; i < network->rates_len; i++) {
1167                                 network->rates[i] = info_element->data[i];
1168 #ifdef CONFIG_LIBIPW_DEBUG
1169                                 p += snprintf(p, sizeof(rates_str) -
1170                                               (p - rates_str), "%02X ",
1171                                               network->rates[i]);
1172 #endif
1173                                 if (ieee80211_is_ofdm_rate
1174                                     (info_element->data[i])) {
1175                                         network->flags |= NETWORK_HAS_OFDM;
1176                                         if (info_element->data[i] &
1177                                             IEEE80211_BASIC_RATE_MASK)
1178                                                 network->flags &=
1179                                                     ~NETWORK_HAS_CCK;
1180                                 }
1181                         }
1182
1183                         IEEE80211_DEBUG_MGMT("WLAN_EID_SUPP_RATES: '%s' (%d)\n",
1184                                              rates_str, network->rates_len);
1185                         break;
1186
1187                 case WLAN_EID_EXT_SUPP_RATES:
1188 #ifdef CONFIG_LIBIPW_DEBUG
1189                         p = rates_str;
1190 #endif
1191                         network->rates_ex_len = min(info_element->len,
1192                                                     MAX_RATES_EX_LENGTH);
1193                         for (i = 0; i < network->rates_ex_len; i++) {
1194                                 network->rates_ex[i] = info_element->data[i];
1195 #ifdef CONFIG_LIBIPW_DEBUG
1196                                 p += snprintf(p, sizeof(rates_str) -
1197                                               (p - rates_str), "%02X ",
1198                                               network->rates[i]);
1199 #endif
1200                                 if (ieee80211_is_ofdm_rate
1201                                     (info_element->data[i])) {
1202                                         network->flags |= NETWORK_HAS_OFDM;
1203                                         if (info_element->data[i] &
1204                                             IEEE80211_BASIC_RATE_MASK)
1205                                                 network->flags &=
1206                                                     ~NETWORK_HAS_CCK;
1207                                 }
1208                         }
1209
1210                         IEEE80211_DEBUG_MGMT("WLAN_EID_EXT_SUPP_RATES: '%s' (%d)\n",
1211                                              rates_str, network->rates_ex_len);
1212                         break;
1213
1214                 case WLAN_EID_DS_PARAMS:
1215                         IEEE80211_DEBUG_MGMT("WLAN_EID_DS_PARAMS: %d\n",
1216                                              info_element->data[0]);
1217                         network->channel = info_element->data[0];
1218                         break;
1219
1220                 case WLAN_EID_FH_PARAMS:
1221                         IEEE80211_DEBUG_MGMT("WLAN_EID_FH_PARAMS: ignored\n");
1222                         break;
1223
1224                 case WLAN_EID_CF_PARAMS:
1225                         IEEE80211_DEBUG_MGMT("WLAN_EID_CF_PARAMS: ignored\n");
1226                         break;
1227
1228                 case WLAN_EID_TIM:
1229                         network->tim.tim_count = info_element->data[0];
1230                         network->tim.tim_period = info_element->data[1];
1231                         IEEE80211_DEBUG_MGMT("WLAN_EID_TIM: partially ignored\n");
1232                         break;
1233
1234                 case WLAN_EID_ERP_INFO:
1235                         network->erp_value = info_element->data[0];
1236                         network->flags |= NETWORK_HAS_ERP_VALUE;
1237                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1238                                              network->erp_value);
1239                         break;
1240
1241                 case WLAN_EID_IBSS_PARAMS:
1242                         network->atim_window = info_element->data[0];
1243                         IEEE80211_DEBUG_MGMT("WLAN_EID_IBSS_PARAMS: %d\n",
1244                                              network->atim_window);
1245                         break;
1246
1247                 case WLAN_EID_CHALLENGE:
1248                         IEEE80211_DEBUG_MGMT("WLAN_EID_CHALLENGE: ignored\n");
1249                         break;
1250
1251                 case WLAN_EID_GENERIC:
1252                         IEEE80211_DEBUG_MGMT("WLAN_EID_GENERIC: %d bytes\n",
1253                                              info_element->len);
1254                         if (!ieee80211_parse_qos_info_param_IE(info_element,
1255                                                                network))
1256                                 break;
1257
1258                         if (info_element->len >= 4 &&
1259                             info_element->data[0] == 0x00 &&
1260                             info_element->data[1] == 0x50 &&
1261                             info_element->data[2] == 0xf2 &&
1262                             info_element->data[3] == 0x01) {
1263                                 network->wpa_ie_len = min(info_element->len + 2,
1264                                                           MAX_WPA_IE_LEN);
1265                                 memcpy(network->wpa_ie, info_element,
1266                                        network->wpa_ie_len);
1267                         }
1268                         break;
1269
1270                 case WLAN_EID_RSN:
1271                         IEEE80211_DEBUG_MGMT("WLAN_EID_RSN: %d bytes\n",
1272                                              info_element->len);
1273                         network->rsn_ie_len = min(info_element->len + 2,
1274                                                   MAX_WPA_IE_LEN);
1275                         memcpy(network->rsn_ie, info_element,
1276                                network->rsn_ie_len);
1277                         break;
1278
1279                 case WLAN_EID_QOS_PARAMETER:
1280                         printk(KERN_ERR
1281                                "QoS Error need to parse QOS_PARAMETER IE\n");
1282                         break;
1283                         /* 802.11h */
1284                 case WLAN_EID_PWR_CONSTRAINT:
1285                         network->power_constraint = info_element->data[0];
1286                         network->flags |= NETWORK_HAS_POWER_CONSTRAINT;
1287                         break;
1288
1289                 case WLAN_EID_CHANNEL_SWITCH:
1290                         network->power_constraint = info_element->data[0];
1291                         network->flags |= NETWORK_HAS_CSA;
1292                         break;
1293
1294                 case WLAN_EID_QUIET:
1295                         network->quiet.count = info_element->data[0];
1296                         network->quiet.period = info_element->data[1];
1297                         network->quiet.duration = info_element->data[2];
1298                         network->quiet.offset = info_element->data[3];
1299                         network->flags |= NETWORK_HAS_QUIET;
1300                         break;
1301
1302                 case WLAN_EID_IBSS_DFS:
1303                         if (network->ibss_dfs)
1304                                 break;
1305                         network->ibss_dfs = kmemdup(info_element->data,
1306                                                     info_element->len,
1307                                                     GFP_ATOMIC);
1308                         if (!network->ibss_dfs)
1309                                 return 1;
1310                         network->flags |= NETWORK_HAS_IBSS_DFS;
1311                         break;
1312
1313                 case WLAN_EID_TPC_REPORT:
1314                         network->tpc_report.transmit_power =
1315                             info_element->data[0];
1316                         network->tpc_report.link_margin = info_element->data[1];
1317                         network->flags |= NETWORK_HAS_TPC_REPORT;
1318                         break;
1319
1320                 default:
1321                         IEEE80211_DEBUG_MGMT
1322                             ("Unsupported info element: %s (%d)\n",
1323                              get_info_element_string(info_element->id),
1324                              info_element->id);
1325                         break;
1326                 }
1327
1328                 length -= sizeof(*info_element) + info_element->len;
1329                 info_element =
1330                     (struct ieee80211_info_element *)&info_element->
1331                     data[info_element->len];
1332         }
1333
1334         return 0;
1335 }
1336
1337 static int ieee80211_handle_assoc_resp(struct ieee80211_device *ieee, struct ieee80211_assoc_response
1338                                        *frame, struct ieee80211_rx_stats *stats)
1339 {
1340         struct ieee80211_network network_resp = {
1341                 .ibss_dfs = NULL,
1342         };
1343         struct ieee80211_network *network = &network_resp;
1344         struct net_device *dev = ieee->dev;
1345
1346         network->flags = 0;
1347         network->qos_data.active = 0;
1348         network->qos_data.supported = 0;
1349         network->qos_data.param_count = 0;
1350         network->qos_data.old_param_count = 0;
1351
1352         //network->atim_window = le16_to_cpu(frame->aid) & (0x3FFF);
1353         network->atim_window = le16_to_cpu(frame->aid);
1354         network->listen_interval = le16_to_cpu(frame->status);
1355         memcpy(network->bssid, frame->header.addr3, ETH_ALEN);
1356         network->capability = le16_to_cpu(frame->capability);
1357         network->last_scanned = jiffies;
1358         network->rates_len = network->rates_ex_len = 0;
1359         network->last_associate = 0;
1360         network->ssid_len = 0;
1361         network->erp_value =
1362             (network->capability & WLAN_CAPABILITY_IBSS) ? 0x3 : 0x0;
1363
1364         if (stats->freq == IEEE80211_52GHZ_BAND) {
1365                 /* for A band (No DS info) */
1366                 network->channel = stats->received_channel;
1367         } else
1368                 network->flags |= NETWORK_HAS_CCK;
1369
1370         network->wpa_ie_len = 0;
1371         network->rsn_ie_len = 0;
1372
1373         if (ieee80211_parse_info_param
1374             (frame->info_element, stats->len - sizeof(*frame), network))
1375                 return 1;
1376
1377         network->mode = 0;
1378         if (stats->freq == IEEE80211_52GHZ_BAND)
1379                 network->mode = IEEE_A;
1380         else {
1381                 if (network->flags & NETWORK_HAS_OFDM)
1382                         network->mode |= IEEE_G;
1383                 if (network->flags & NETWORK_HAS_CCK)
1384                         network->mode |= IEEE_B;
1385         }
1386
1387         memcpy(&network->stats, stats, sizeof(network->stats));
1388
1389         if (ieee->handle_assoc_response != NULL)
1390                 ieee->handle_assoc_response(dev, frame, network);
1391
1392         return 0;
1393 }
1394
1395 /***************************************************/
1396
1397 static int ieee80211_network_init(struct ieee80211_device *ieee, struct ieee80211_probe_response
1398                                          *beacon,
1399                                          struct ieee80211_network *network,
1400                                          struct ieee80211_rx_stats *stats)
1401 {
1402         DECLARE_SSID_BUF(ssid);
1403
1404         network->qos_data.active = 0;
1405         network->qos_data.supported = 0;
1406         network->qos_data.param_count = 0;
1407         network->qos_data.old_param_count = 0;
1408
1409         /* Pull out fixed field data */
1410         memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
1411         network->capability = le16_to_cpu(beacon->capability);
1412         network->last_scanned = jiffies;
1413         network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
1414         network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
1415         network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
1416         /* Where to pull this? beacon->listen_interval; */
1417         network->listen_interval = 0x0A;
1418         network->rates_len = network->rates_ex_len = 0;
1419         network->last_associate = 0;
1420         network->ssid_len = 0;
1421         network->flags = 0;
1422         network->atim_window = 0;
1423         network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
1424             0x3 : 0x0;
1425
1426         if (stats->freq == IEEE80211_52GHZ_BAND) {
1427                 /* for A band (No DS info) */
1428                 network->channel = stats->received_channel;
1429         } else
1430                 network->flags |= NETWORK_HAS_CCK;
1431
1432         network->wpa_ie_len = 0;
1433         network->rsn_ie_len = 0;
1434
1435         if (ieee80211_parse_info_param
1436             (beacon->info_element, stats->len - sizeof(*beacon), network))
1437                 return 1;
1438
1439         network->mode = 0;
1440         if (stats->freq == IEEE80211_52GHZ_BAND)
1441                 network->mode = IEEE_A;
1442         else {
1443                 if (network->flags & NETWORK_HAS_OFDM)
1444                         network->mode |= IEEE_G;
1445                 if (network->flags & NETWORK_HAS_CCK)
1446                         network->mode |= IEEE_B;
1447         }
1448
1449         if (network->mode == 0) {
1450                 IEEE80211_DEBUG_SCAN("Filtered out '%s (%pM)' "
1451                                      "network.\n",
1452                                      print_ssid(ssid, network->ssid,
1453                                                  network->ssid_len),
1454                                      network->bssid);
1455                 return 1;
1456         }
1457
1458         memcpy(&network->stats, stats, sizeof(network->stats));
1459
1460         return 0;
1461 }
1462
1463 static inline int is_same_network(struct ieee80211_network *src,
1464                                   struct ieee80211_network *dst)
1465 {
1466         /* A network is only a duplicate if the channel, BSSID, and ESSID
1467          * all match.  We treat all <hidden> with the same BSSID and channel
1468          * as one network */
1469         return ((src->ssid_len == dst->ssid_len) &&
1470                 (src->channel == dst->channel) &&
1471                 !compare_ether_addr(src->bssid, dst->bssid) &&
1472                 !memcmp(src->ssid, dst->ssid, src->ssid_len));
1473 }
1474
1475 static void update_network(struct ieee80211_network *dst,
1476                                   struct ieee80211_network *src)
1477 {
1478         int qos_active;
1479         u8 old_param;
1480
1481         ieee80211_network_reset(dst);
1482         dst->ibss_dfs = src->ibss_dfs;
1483
1484         /* We only update the statistics if they were created by receiving
1485          * the network information on the actual channel the network is on.
1486          *
1487          * This keeps beacons received on neighbor channels from bringing
1488          * down the signal level of an AP. */
1489         if (dst->channel == src->stats.received_channel)
1490                 memcpy(&dst->stats, &src->stats,
1491                        sizeof(struct ieee80211_rx_stats));
1492         else
1493                 IEEE80211_DEBUG_SCAN("Network %pM info received "
1494                         "off channel (%d vs. %d)\n", src->bssid,
1495                         dst->channel, src->stats.received_channel);
1496
1497         dst->capability = src->capability;
1498         memcpy(dst->rates, src->rates, src->rates_len);
1499         dst->rates_len = src->rates_len;
1500         memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
1501         dst->rates_ex_len = src->rates_ex_len;
1502
1503         dst->mode = src->mode;
1504         dst->flags = src->flags;
1505         dst->time_stamp[0] = src->time_stamp[0];
1506         dst->time_stamp[1] = src->time_stamp[1];
1507
1508         dst->beacon_interval = src->beacon_interval;
1509         dst->listen_interval = src->listen_interval;
1510         dst->atim_window = src->atim_window;
1511         dst->erp_value = src->erp_value;
1512         dst->tim = src->tim;
1513
1514         memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
1515         dst->wpa_ie_len = src->wpa_ie_len;
1516         memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
1517         dst->rsn_ie_len = src->rsn_ie_len;
1518
1519         dst->last_scanned = jiffies;
1520         qos_active = src->qos_data.active;
1521         old_param = dst->qos_data.old_param_count;
1522         if (dst->flags & NETWORK_HAS_QOS_MASK)
1523                 memcpy(&dst->qos_data, &src->qos_data,
1524                        sizeof(struct ieee80211_qos_data));
1525         else {
1526                 dst->qos_data.supported = src->qos_data.supported;
1527                 dst->qos_data.param_count = src->qos_data.param_count;
1528         }
1529
1530         if (dst->qos_data.supported == 1) {
1531                 if (dst->ssid_len)
1532                         IEEE80211_DEBUG_QOS
1533                             ("QoS the network %s is QoS supported\n",
1534                              dst->ssid);
1535                 else
1536                         IEEE80211_DEBUG_QOS
1537                             ("QoS the network is QoS supported\n");
1538         }
1539         dst->qos_data.active = qos_active;
1540         dst->qos_data.old_param_count = old_param;
1541
1542         /* dst->last_associate is not overwritten */
1543 }
1544
1545 static inline int is_beacon(__le16 fc)
1546 {
1547         return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON);
1548 }
1549
1550 static void ieee80211_process_probe_response(struct ieee80211_device
1551                                                     *ieee, struct
1552                                                     ieee80211_probe_response
1553                                                     *beacon, struct ieee80211_rx_stats
1554                                                     *stats)
1555 {
1556         struct net_device *dev = ieee->dev;
1557         struct ieee80211_network network = {
1558                 .ibss_dfs = NULL,
1559         };
1560         struct ieee80211_network *target;
1561         struct ieee80211_network *oldest = NULL;
1562 #ifdef CONFIG_LIBIPW_DEBUG
1563         struct ieee80211_info_element *info_element = beacon->info_element;
1564 #endif
1565         unsigned long flags;
1566         DECLARE_SSID_BUF(ssid);
1567
1568         IEEE80211_DEBUG_SCAN("'%s' (%pM"
1569                      "): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
1570                      print_ssid(ssid, info_element->data, info_element->len),
1571                      beacon->header.addr3,
1572                      (beacon->capability & cpu_to_le16(1 << 0xf)) ? '1' : '0',
1573                      (beacon->capability & cpu_to_le16(1 << 0xe)) ? '1' : '0',
1574                      (beacon->capability & cpu_to_le16(1 << 0xd)) ? '1' : '0',
1575                      (beacon->capability & cpu_to_le16(1 << 0xc)) ? '1' : '0',
1576                      (beacon->capability & cpu_to_le16(1 << 0xb)) ? '1' : '0',
1577                      (beacon->capability & cpu_to_le16(1 << 0xa)) ? '1' : '0',
1578                      (beacon->capability & cpu_to_le16(1 << 0x9)) ? '1' : '0',
1579                      (beacon->capability & cpu_to_le16(1 << 0x8)) ? '1' : '0',
1580                      (beacon->capability & cpu_to_le16(1 << 0x7)) ? '1' : '0',
1581                      (beacon->capability & cpu_to_le16(1 << 0x6)) ? '1' : '0',
1582                      (beacon->capability & cpu_to_le16(1 << 0x5)) ? '1' : '0',
1583                      (beacon->capability & cpu_to_le16(1 << 0x4)) ? '1' : '0',
1584                      (beacon->capability & cpu_to_le16(1 << 0x3)) ? '1' : '0',
1585                      (beacon->capability & cpu_to_le16(1 << 0x2)) ? '1' : '0',
1586                      (beacon->capability & cpu_to_le16(1 << 0x1)) ? '1' : '0',
1587                      (beacon->capability & cpu_to_le16(1 << 0x0)) ? '1' : '0');
1588
1589         if (ieee80211_network_init(ieee, beacon, &network, stats)) {
1590                 IEEE80211_DEBUG_SCAN("Dropped '%s' (%pM) via %s.\n",
1591                                      print_ssid(ssid, info_element->data,
1592                                                  info_element->len),
1593                                      beacon->header.addr3,
1594                                      is_beacon(beacon->header.frame_ctl) ?
1595                                      "BEACON" : "PROBE RESPONSE");
1596                 return;
1597         }
1598
1599         /* The network parsed correctly -- so now we scan our known networks
1600          * to see if we can find it in our list.
1601          *
1602          * NOTE:  This search is definitely not optimized.  Once its doing
1603          *        the "right thing" we'll optimize it for efficiency if
1604          *        necessary */
1605
1606         /* Search for this entry in the list and update it if it is
1607          * already there. */
1608
1609         spin_lock_irqsave(&ieee->lock, flags);
1610
1611         list_for_each_entry(target, &ieee->network_list, list) {
1612                 if (is_same_network(target, &network))
1613                         break;
1614
1615                 if ((oldest == NULL) ||
1616                     time_before(target->last_scanned, oldest->last_scanned))
1617                         oldest = target;
1618         }
1619
1620         /* If we didn't find a match, then get a new network slot to initialize
1621          * with this beacon's information */
1622         if (&target->list == &ieee->network_list) {
1623                 if (list_empty(&ieee->network_free_list)) {
1624                         /* If there are no more slots, expire the oldest */
1625                         list_del(&oldest->list);
1626                         target = oldest;
1627                         IEEE80211_DEBUG_SCAN("Expired '%s' (%pM) from "
1628                                              "network list.\n",
1629                                              print_ssid(ssid, target->ssid,
1630                                                          target->ssid_len),
1631                                              target->bssid);
1632                         ieee80211_network_reset(target);
1633                 } else {
1634                         /* Otherwise just pull from the free list */
1635                         target = list_entry(ieee->network_free_list.next,
1636                                             struct ieee80211_network, list);
1637                         list_del(ieee->network_free_list.next);
1638                 }
1639
1640 #ifdef CONFIG_LIBIPW_DEBUG
1641                 IEEE80211_DEBUG_SCAN("Adding '%s' (%pM) via %s.\n",
1642                                      print_ssid(ssid, network.ssid,
1643                                                  network.ssid_len),
1644                                      network.bssid,
1645                                      is_beacon(beacon->header.frame_ctl) ?
1646                                      "BEACON" : "PROBE RESPONSE");
1647 #endif
1648                 memcpy(target, &network, sizeof(*target));
1649                 network.ibss_dfs = NULL;
1650                 list_add_tail(&target->list, &ieee->network_list);
1651         } else {
1652                 IEEE80211_DEBUG_SCAN("Updating '%s' (%pM) via %s.\n",
1653                                      print_ssid(ssid, target->ssid,
1654                                                  target->ssid_len),
1655                                      target->bssid,
1656                                      is_beacon(beacon->header.frame_ctl) ?
1657                                      "BEACON" : "PROBE RESPONSE");
1658                 update_network(target, &network);
1659                 network.ibss_dfs = NULL;
1660         }
1661
1662         spin_unlock_irqrestore(&ieee->lock, flags);
1663
1664         if (is_beacon(beacon->header.frame_ctl)) {
1665                 if (ieee->handle_beacon != NULL)
1666                         ieee->handle_beacon(dev, beacon, target);
1667         } else {
1668                 if (ieee->handle_probe_response != NULL)
1669                         ieee->handle_probe_response(dev, beacon, target);
1670         }
1671 }
1672
1673 void ieee80211_rx_mgt(struct ieee80211_device *ieee,
1674                       struct ieee80211_hdr_4addr *header,
1675                       struct ieee80211_rx_stats *stats)
1676 {
1677         switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
1678         case IEEE80211_STYPE_ASSOC_RESP:
1679                 IEEE80211_DEBUG_MGMT("received ASSOCIATION RESPONSE (%d)\n",
1680                                      WLAN_FC_GET_STYPE(le16_to_cpu
1681                                                        (header->frame_ctl)));
1682                 ieee80211_handle_assoc_resp(ieee,
1683                                             (struct ieee80211_assoc_response *)
1684                                             header, stats);
1685                 break;
1686
1687         case IEEE80211_STYPE_REASSOC_RESP:
1688                 IEEE80211_DEBUG_MGMT("received REASSOCIATION RESPONSE (%d)\n",
1689                                      WLAN_FC_GET_STYPE(le16_to_cpu
1690                                                        (header->frame_ctl)));
1691                 break;
1692
1693         case IEEE80211_STYPE_PROBE_REQ:
1694                 IEEE80211_DEBUG_MGMT("received auth (%d)\n",
1695                                      WLAN_FC_GET_STYPE(le16_to_cpu
1696                                                        (header->frame_ctl)));
1697
1698                 if (ieee->handle_probe_request != NULL)
1699                         ieee->handle_probe_request(ieee->dev,
1700                                                    (struct
1701                                                     ieee80211_probe_request *)
1702                                                    header, stats);
1703                 break;
1704
1705         case IEEE80211_STYPE_PROBE_RESP:
1706                 IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
1707                                      WLAN_FC_GET_STYPE(le16_to_cpu
1708                                                        (header->frame_ctl)));
1709                 IEEE80211_DEBUG_SCAN("Probe response\n");
1710                 ieee80211_process_probe_response(ieee,
1711                                                  (struct
1712                                                   ieee80211_probe_response *)
1713                                                  header, stats);
1714                 break;
1715
1716         case IEEE80211_STYPE_BEACON:
1717                 IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
1718                                      WLAN_FC_GET_STYPE(le16_to_cpu
1719                                                        (header->frame_ctl)));
1720                 IEEE80211_DEBUG_SCAN("Beacon\n");
1721                 ieee80211_process_probe_response(ieee,
1722                                                  (struct
1723                                                   ieee80211_probe_response *)
1724                                                  header, stats);
1725                 break;
1726         case IEEE80211_STYPE_AUTH:
1727
1728                 IEEE80211_DEBUG_MGMT("received auth (%d)\n",
1729                                      WLAN_FC_GET_STYPE(le16_to_cpu
1730                                                        (header->frame_ctl)));
1731
1732                 if (ieee->handle_auth != NULL)
1733                         ieee->handle_auth(ieee->dev,
1734                                           (struct ieee80211_auth *)header);
1735                 break;
1736
1737         case IEEE80211_STYPE_DISASSOC:
1738                 if (ieee->handle_disassoc != NULL)
1739                         ieee->handle_disassoc(ieee->dev,
1740                                               (struct ieee80211_disassoc *)
1741                                               header);
1742                 break;
1743
1744         case IEEE80211_STYPE_ACTION:
1745                 IEEE80211_DEBUG_MGMT("ACTION\n");
1746                 if (ieee->handle_action)
1747                         ieee->handle_action(ieee->dev,
1748                                             (struct ieee80211_action *)
1749                                             header, stats);
1750                 break;
1751
1752         case IEEE80211_STYPE_REASSOC_REQ:
1753                 IEEE80211_DEBUG_MGMT("received reassoc (%d)\n",
1754                                      WLAN_FC_GET_STYPE(le16_to_cpu
1755                                                        (header->frame_ctl)));
1756
1757                 IEEE80211_DEBUG_MGMT("%s: IEEE80211_REASSOC_REQ received\n",
1758                                      ieee->dev->name);
1759                 if (ieee->handle_reassoc_request != NULL)
1760                         ieee->handle_reassoc_request(ieee->dev,
1761                                                     (struct ieee80211_reassoc_request *)
1762                                                      header);
1763                 break;
1764
1765         case IEEE80211_STYPE_ASSOC_REQ:
1766                 IEEE80211_DEBUG_MGMT("received assoc (%d)\n",
1767                                      WLAN_FC_GET_STYPE(le16_to_cpu
1768                                                        (header->frame_ctl)));
1769
1770                 IEEE80211_DEBUG_MGMT("%s: IEEE80211_ASSOC_REQ received\n",
1771                                      ieee->dev->name);
1772                 if (ieee->handle_assoc_request != NULL)
1773                         ieee->handle_assoc_request(ieee->dev);
1774                 break;
1775
1776         case IEEE80211_STYPE_DEAUTH:
1777                 IEEE80211_DEBUG_MGMT("DEAUTH\n");
1778                 if (ieee->handle_deauth != NULL)
1779                         ieee->handle_deauth(ieee->dev,
1780                                             (struct ieee80211_deauth *)
1781                                             header);
1782                 break;
1783         default:
1784                 IEEE80211_DEBUG_MGMT("received UNKNOWN (%d)\n",
1785                                      WLAN_FC_GET_STYPE(le16_to_cpu
1786                                                        (header->frame_ctl)));
1787                 IEEE80211_DEBUG_MGMT("%s: Unknown management packet: %d\n",
1788                                      ieee->dev->name,
1789                                      WLAN_FC_GET_STYPE(le16_to_cpu
1790                                                        (header->frame_ctl)));
1791                 break;
1792         }
1793 }
1794
1795 EXPORT_SYMBOL_GPL(ieee80211_rx_any);
1796 EXPORT_SYMBOL(ieee80211_rx_mgt);
1797 EXPORT_SYMBOL(ieee80211_rx);