net/ieee80211/ieee80211_rx.c

   1 /*
   2  * Original code based Host AP (software wireless LAN access point) driver
   3  * for Intersil Prism2/2.5/3 - hostap.o module, common routines
   4  *
   5  * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
   6  * <j@w1.fi>
   7  * Copyright (c) 2002-2003, Jouni Malinen <j@w1.fi>
   8  * Copyright (c) 2004-2005, Intel Corporation
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation. See README and COPYING for
  13  * more details.
  14  */
  15
  16 #include <linux/compiler.h>
  17 #include <linux/errno.h>
  18 #include <linux/if_arp.h>
  19 #include <linux/in6.h>
  20 #include <linux/in.h>
  21 #include <linux/ip.h>
  22 #include <linux/kernel.h>
  23 #include <linux/module.h>
  24 #include <linux/netdevice.h>
  25 #include <linux/proc_fs.h>
  26 #include <linux/skbuff.h>
  27 #include <linux/slab.h>
  28 #include <linux/tcp.h>
  29 #include <linux/types.h>
  30 #include <linux/wireless.h>
  31 #include <linux/etherdevice.h>
  32 #include <asm/uaccess.h>
  33 #include <linux/ctype.h>
  34
  35 #include <net/ieee80211.h>
  36
  37 static void ieee80211_monitor_rx(struct ieee80211_device *ieee,
  38                                         struct sk_buff *skb,
  39                                         struct ieee80211_rx_stats *rx_stats)
  40 {
  41         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
  42         u16 fc = le16_to_cpu(hdr->frame_ctl);
  43
  44         skb->dev = ieee->dev;
  45         skb_reset_mac_header(skb);
  46         skb_pull(skb, ieee80211_get_hdrlen(fc));
  47         skb->pkt_type = PACKET_OTHERHOST;
  48         skb->protocol = htons(ETH_P_80211_RAW);
  49         memset(skb->cb, 0, sizeof(skb->cb));
  50         netif_rx(skb);
  51 }
  52
  53 /* Called only as a tasklet (software IRQ) */
  54 static struct ieee80211_frag_entry *ieee80211_frag_cache_find(struct
  55                                                               ieee80211_device
  56                                                               *ieee,
  57                                                               unsigned int seq,
  58                                                               unsigned int frag,
  59                                                               u8 * src,
  60                                                               u8 * dst)
  61 {
  62         struct ieee80211_frag_entry *entry;
  63         int i;
  64
  65         for (i = 0; i < IEEE80211_FRAG_CACHE_LEN; i++) {
  66                 entry = &ieee->frag_cache[i];
  67                 if (entry->skb != NULL &&
  68                     time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
  69                         IEEE80211_DEBUG_FRAG("expiring fragment cache entry "
  70                                              "seq=%u last_frag=%u\n",
  71                                              entry->seq, entry->last_frag);
  72                         dev_kfree_skb_any(entry->skb);
  73                         entry->skb = NULL;
  74                 }
  75
  76                 if (entry->skb != NULL && entry->seq == seq &&
  77                     (entry->last_frag + 1 == frag || frag == -1) &&
  78                     !compare_ether_addr(entry->src_addr, src) &&
  79                     !compare_ether_addr(entry->dst_addr, dst))
  80                         return entry;
  81         }
  82
  83         return NULL;
  84 }
  85
  86 /* Called only as a tasklet (software IRQ) */
  87 static struct sk_buff *ieee80211_frag_cache_get(struct ieee80211_device *ieee,
  88                                                 struct ieee80211_hdr_4addr *hdr)
  89 {
  90         struct sk_buff *skb = NULL;
  91         u16 sc;
  92         unsigned int frag, seq;
  93         struct ieee80211_frag_entry *entry;
  94
  95         sc = le16_to_cpu(hdr->seq_ctl);
  96         frag = WLAN_GET_SEQ_FRAG(sc);
  97         seq = WLAN_GET_SEQ_SEQ(sc);
  98
  99         if (frag == 0) {
 100                 /* Reserve enough space to fit maximum frame length */
 101                 skb = dev_alloc_skb(ieee->dev->mtu +
 102                                     sizeof(struct ieee80211_hdr_4addr) +
 103                                     8 /* LLC */  +
 104                                     2 /* alignment */  +
 105                                     8 /* WEP */  + ETH_ALEN /* WDS */ );
 106                 if (skb == NULL)
 107                         return NULL;
 108
 109                 entry = &ieee->frag_cache[ieee->frag_next_idx];
 110                 ieee->frag_next_idx++;
 111                 if (ieee->frag_next_idx >= IEEE80211_FRAG_CACHE_LEN)
 112                         ieee->frag_next_idx = 0;
 113
 114                 if (entry->skb != NULL)
 115                         dev_kfree_skb_any(entry->skb);
 116
 117                 entry->first_frag_time = jiffies;
 118                 entry->seq = seq;
 119                 entry->last_frag = frag;
 120                 entry->skb = skb;
 121                 memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
 122                 memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
 123         } else {
 124                 /* received a fragment of a frame for which the head fragment
 125                  * should have already been received */
 126                 entry = ieee80211_frag_cache_find(ieee, seq, frag, hdr->addr2,
 127                                                   hdr->addr1);
 128                 if (entry != NULL) {
 129                         entry->last_frag = frag;
 130                         skb = entry->skb;
 131                 }
 132         }
 133
 134         return skb;
 135 }
 136
 137 /* Called only as a tasklet (software IRQ) */
 138 static int ieee80211_frag_cache_invalidate(struct ieee80211_device *ieee,
 139                                            struct ieee80211_hdr_4addr *hdr)
 140 {
 141         u16 sc;
 142         unsigned int seq;
 143         struct ieee80211_frag_entry *entry;
 144
 145         sc = le16_to_cpu(hdr->seq_ctl);
 146         seq = WLAN_GET_SEQ_SEQ(sc);
 147
 148         entry = ieee80211_frag_cache_find(ieee, seq, -1, hdr->addr2,
 149                                           hdr->addr1);
 150
 151         if (entry == NULL) {
 152                 IEEE80211_DEBUG_FRAG("could not invalidate fragment cache "
 153                                      "entry (seq=%u)\n", seq);
 154                 return -1;
 155         }
 156
 157         entry->skb = NULL;
 158         return 0;
 159 }
 160
 161 #ifdef NOT_YET
 162 /* ieee80211_rx_frame_mgtmt
 163  *
 164  * Responsible for handling management control frames
 165  *
 166  * Called by ieee80211_rx */
 167 static int
 168 ieee80211_rx_frame_mgmt(struct ieee80211_device *ieee, struct sk_buff *skb,
 169                         struct ieee80211_rx_stats *rx_stats, u16 type,
 170                         u16 stype)
 171 {
 172         if (ieee->iw_mode == IW_MODE_MASTER) {
 173                 printk(KERN_DEBUG "%s: Master mode not yet suppported.\n",
 174                        ieee->dev->name);
 175                 return 0;
 176 /*
 177   hostap_update_sta_ps(ieee, (struct hostap_ieee80211_hdr_4addr *)
 178   skb->data);*/
 179         }
 180
 181         if (ieee->hostapd && type == WLAN_FC_TYPE_MGMT) {
 182                 if (stype == WLAN_FC_STYPE_BEACON &&
 183                     ieee->iw_mode == IW_MODE_MASTER) {
 184                         struct sk_buff *skb2;
 185                         /* Process beacon frames also in kernel driver to
 186                          * update STA(AP) table statistics */
 187                         skb2 = skb_clone(skb, GFP_ATOMIC);
 188                         if (skb2)
 189                                 hostap_rx(skb2->dev, skb2, rx_stats);
 190                 }
 191
 192                 /* send management frames to the user space daemon for
 193                  * processing */
 194                 ieee->apdevstats.rx_packets++;
 195                 ieee->apdevstats.rx_bytes += skb->len;
 196                 prism2_rx_80211(ieee->apdev, skb, rx_stats, PRISM2_RX_MGMT);
 197                 return 0;
 198         }
 199
 200         if (ieee->iw_mode == IW_MODE_MASTER) {
 201                 if (type != WLAN_FC_TYPE_MGMT && type != WLAN_FC_TYPE_CTRL) {
 202                         printk(KERN_DEBUG "%s: unknown management frame "
 203                                "(type=0x%02x, stype=0x%02x) dropped\n",
 204                                skb->dev->name, type, stype);
 205                         return -1;
 206                 }
 207
 208                 hostap_rx(skb->dev, skb, rx_stats);
 209                 return 0;
 210         }
 211
 212         printk(KERN_DEBUG "%s: hostap_rx_frame_mgmt: management frame "
 213                "received in non-Host AP mode\n", skb->dev->name);
 214         return -1;
 215 }
 216 #endif
 217
 218 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
 219 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
 220 static unsigned char rfc1042_header[] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
 221
 222 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
 223 static unsigned char bridge_tunnel_header[] =
 224     { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
 225 /* No encapsulation header if EtherType < 0x600 (=length) */
 226
 227 /* Called by ieee80211_rx_frame_decrypt */
 228 static int ieee80211_is_eapol_frame(struct ieee80211_device *ieee,
 229                                     struct sk_buff *skb)
 230 {
 231         struct net_device *dev = ieee->dev;
 232         u16 fc, ethertype;
 233         struct ieee80211_hdr_3addr *hdr;
 234         u8 *pos;
 235
 236         if (skb->len < 24)
 237                 return 0;
 238
 239         hdr = (struct ieee80211_hdr_3addr *)skb->data;
 240         fc = le16_to_cpu(hdr->frame_ctl);
 241
 242         /* check that the frame is unicast frame to us */
 243         if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 244             IEEE80211_FCTL_TODS &&
 245             !compare_ether_addr(hdr->addr1, dev->dev_addr) &&
 246             !compare_ether_addr(hdr->addr3, dev->dev_addr)) {
 247                 /* ToDS frame with own addr BSSID and DA */
 248         } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 249                    IEEE80211_FCTL_FROMDS &&
 250                    !compare_ether_addr(hdr->addr1, dev->dev_addr)) {
 251                 /* FromDS frame with own addr as DA */
 252         } else
 253                 return 0;
 254
 255         if (skb->len < 24 + 8)
 256                 return 0;
 257
 258         /* check for port access entity Ethernet type */
 259         pos = skb->data + 24;
 260         ethertype = (pos[6] << 8) | pos[7];
 261         if (ethertype == ETH_P_PAE)
 262                 return 1;
 263
 264         return 0;
 265 }
 266
 267 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
 268 static int
 269 ieee80211_rx_frame_decrypt(struct ieee80211_device *ieee, struct sk_buff *skb,
 270                            struct ieee80211_crypt_data *crypt)
 271 {
 272         struct ieee80211_hdr_3addr *hdr;
 273         int res, hdrlen;
 274
 275         if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
 276                 return 0;
 277
 278         hdr = (struct ieee80211_hdr_3addr *)skb->data;
 279         hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 280
 281         atomic_inc(&crypt->refcnt);
 282         res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
 283         atomic_dec(&crypt->refcnt);
 284         if (res < 0) {
 285                 IEEE80211_DEBUG_DROP("decryption failed (SA=" MAC_FMT
 286                                      ") res=%d\n",
 287                                      hdr->addr2[0], hdr->addr2[1],
 288                                      hdr->addr2[2], hdr->addr2[3],
 289                                      hdr->addr2[4], hdr->addr2[5],
 290                                      res);
 291                 if (res == -2)
 292                         IEEE80211_DEBUG_DROP("Decryption failed ICV "
 293                                              "mismatch (key %d)\n",
 294                                              skb->data[hdrlen + 3] >> 6);
 295                 ieee->ieee_stats.rx_discards_undecryptable++;
 296                 return -1;
 297         }
 298
 299         return res;
 300 }
 301
 302 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
 303 static int
 304 ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device *ieee,
 305                                 struct sk_buff *skb, int keyidx,
 306                                 struct ieee80211_crypt_data *crypt)
 307 {
 308         struct ieee80211_hdr_3addr *hdr;
 309         int res, hdrlen;
 310
 311         if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
 312                 return 0;
 313
 314         hdr = (struct ieee80211_hdr_3addr *)skb->data;
 315         hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 316
 317         atomic_inc(&crypt->refcnt);
 318         res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
 319         atomic_dec(&crypt->refcnt);
 320         if (res < 0) {
 321                 printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
 322                        " (SA=" MAC_FMT " keyidx=%d)\n",
 323                        ieee->dev->name,
 324                        hdr->addr2[0], hdr->addr2[1],
 325                        hdr->addr2[2], hdr->addr2[3],
 326                        hdr->addr2[4], hdr->addr2[5],
 327                        keyidx);
 328                 return -1;
 329         }
 330
 331         return 0;
 332 }
 333
 334 /* All received frames are sent to this function. @skb contains the frame in
 335  * IEEE 802.11 format, i.e., in the format it was sent over air.
 336  * This function is called only as a tasklet (software IRQ). */
 337 int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
 338                  struct ieee80211_rx_stats *rx_stats)
 339 {
 340         struct net_device *dev = ieee->dev;
 341         struct ieee80211_hdr_4addr *hdr;
 342         size_t hdrlen;
 343         u16 fc, type, stype, sc;
 344         struct net_device_stats *stats;
 345         unsigned int frag;
 346         u8 *payload;
 347         u16 ethertype;
 348 #ifdef NOT_YET
 349         struct net_device *wds = NULL;
 350         struct sk_buff *skb2 = NULL;
 351         struct net_device *wds = NULL;
 352         int frame_authorized = 0;
 353         int from_assoc_ap = 0;
 354         void *sta = NULL;
 355 #endif
 356         u8 dst[ETH_ALEN];
 357         u8 src[ETH_ALEN];
 358         struct ieee80211_crypt_data *crypt = NULL;
 359         int keyidx = 0;
 360         int can_be_decrypted = 0;
 361         DECLARE_MAC_BUF(mac);
 362
 363         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 364         stats = &ieee->stats;
 365
 366         if (skb->len < 10) {
 367                 printk(KERN_INFO "%s: SKB length < 10\n", dev->name);
 368                 goto rx_dropped;
 369         }
 370
 371         fc = le16_to_cpu(hdr->frame_ctl);
 372         type = WLAN_FC_GET_TYPE(fc);
 373         stype = WLAN_FC_GET_STYPE(fc);
 374         sc = le16_to_cpu(hdr->seq_ctl);
 375         frag = WLAN_GET_SEQ_FRAG(sc);
 376         hdrlen = ieee80211_get_hdrlen(fc);
 377
 378         if (skb->len < hdrlen) {
 379                 printk(KERN_INFO "%s: invalid SKB length %d\n",
 380                         dev->name, skb->len);
 381                 goto rx_dropped;
 382         }
 383
 384         /* Put this code here so that we avoid duplicating it in all
 385          * Rx paths. - Jean II */
 386 #ifdef CONFIG_WIRELESS_EXT
 387 #ifdef IW_WIRELESS_SPY          /* defined in iw_handler.h */
 388         /* If spy monitoring on */
 389         if (ieee->spy_data.spy_number > 0) {
 390                 struct iw_quality wstats;
 391
 392                 wstats.updated = 0;
 393                 if (rx_stats->mask & IEEE80211_STATMASK_RSSI) {
 394                         wstats.level = rx_stats->rssi;
 395                         wstats.updated |= IW_QUAL_LEVEL_UPDATED;
 396                 } else
 397                         wstats.updated |= IW_QUAL_LEVEL_INVALID;
 398
 399                 if (rx_stats->mask & IEEE80211_STATMASK_NOISE) {
 400                         wstats.noise = rx_stats->noise;
 401                         wstats.updated |= IW_QUAL_NOISE_UPDATED;
 402                 } else
 403                         wstats.updated |= IW_QUAL_NOISE_INVALID;
 404
 405                 if (rx_stats->mask & IEEE80211_STATMASK_SIGNAL) {
 406                         wstats.qual = rx_stats->signal;
 407                         wstats.updated |= IW_QUAL_QUAL_UPDATED;
 408                 } else
 409                         wstats.updated |= IW_QUAL_QUAL_INVALID;
 410
 411                 /* Update spy records */
 412                 wireless_spy_update(ieee->dev, hdr->addr2, &wstats);
 413         }
 414 #endif                          /* IW_WIRELESS_SPY */
 415 #endif                          /* CONFIG_WIRELESS_EXT */
 416
 417 #ifdef NOT_YET
 418         hostap_update_rx_stats(local->ap, hdr, rx_stats);
 419 #endif
 420
 421         if (ieee->iw_mode == IW_MODE_MONITOR) {
 422                 stats->rx_packets++;
 423                 stats->rx_bytes += skb->len;
 424                 ieee80211_monitor_rx(ieee, skb, rx_stats);
 425                 return 1;
 426         }
 427
 428         can_be_decrypted = (is_multicast_ether_addr(hdr->addr1) ||
 429                             is_broadcast_ether_addr(hdr->addr2)) ?
 430             ieee->host_mc_decrypt : ieee->host_decrypt;
 431
 432         if (can_be_decrypted) {
 433                 if (skb->len >= hdrlen + 3) {
 434                         /* Top two-bits of byte 3 are the key index */
 435                         keyidx = skb->data[hdrlen + 3] >> 6;
 436                 }
 437
 438                 /* ieee->crypt[] is WEP_KEY (4) in length.  Given that keyidx
 439                  * is only allowed 2-bits of storage, no value of keyidx can
 440                  * be provided via above code that would result in keyidx
 441                  * being out of range */
 442                 crypt = ieee->crypt[keyidx];
 443
 444 #ifdef NOT_YET
 445                 sta = NULL;
 446
 447                 /* Use station specific key to override default keys if the
 448                  * receiver address is a unicast address ("individual RA"). If
 449                  * bcrx_sta_key parameter is set, station specific key is used
 450                  * even with broad/multicast targets (this is against IEEE
 451                  * 802.11, but makes it easier to use different keys with
 452                  * stations that do not support WEP key mapping). */
 453
 454                 if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key)
 455                         (void)hostap_handle_sta_crypto(local, hdr, &crypt,
 456                                                        &sta);
 457 #endif
 458
 459                 /* allow NULL decrypt to indicate an station specific override
 460                  * for default encryption */
 461                 if (crypt && (crypt->ops == NULL ||
 462                               crypt->ops->decrypt_mpdu == NULL))
 463                         crypt = NULL;
 464
 465                 if (!crypt && (fc & IEEE80211_FCTL_PROTECTED)) {
 466                         /* This seems to be triggered by some (multicast?)
 467                          * frames from other than current BSS, so just drop the
 468                          * frames silently instead of filling system log with
 469                          * these reports. */
 470                         IEEE80211_DEBUG_DROP("Decryption failed (not set)"
 471                                              " (SA=" MAC_FMT ")\n",
 472                                              hdr->addr2[0], hdr->addr2[1],
 473                                              hdr->addr2[2], hdr->addr2[3],
 474                                              hdr->addr2[4], hdr->addr2[5]);
 475                         ieee->ieee_stats.rx_discards_undecryptable++;
 476                         goto rx_dropped;
 477                 }
 478         }
 479 #ifdef NOT_YET
 480         if (type != WLAN_FC_TYPE_DATA) {
 481                 if (type == WLAN_FC_TYPE_MGMT && stype == WLAN_FC_STYPE_AUTH &&
 482                     fc & IEEE80211_FCTL_PROTECTED && ieee->host_decrypt &&
 483                     (keyidx = hostap_rx_frame_decrypt(ieee, skb, crypt)) < 0) {
 484                         printk(KERN_DEBUG "%s: failed to decrypt mgmt::auth "
 485                                "from " MAC_FMT "\n", dev->name,
 486                                hdr->addr2[0], hdr->addr2[1],
 487                                hdr->addr2[2], hdr->addr2[3],
 488                                hdr->addr2[4], hdr->addr2[5]);
 489                         /* TODO: could inform hostapd about this so that it
 490                          * could send auth failure report */
 491                         goto rx_dropped;
 492                 }
 493
 494                 if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
 495                         goto rx_dropped;
 496                 else
 497                         goto rx_exit;
 498         }
 499 #endif
 500         /* drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.29) */
 501         if (sc == ieee->prev_seq_ctl)
 502                 goto rx_dropped;
 503         else
 504                 ieee->prev_seq_ctl = sc;
 505
 506         /* Data frame - extract src/dst addresses */
 507         if (skb->len < IEEE80211_3ADDR_LEN)
 508                 goto rx_dropped;
 509
 510         switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
 511         case IEEE80211_FCTL_FROMDS:
 512                 memcpy(dst, hdr->addr1, ETH_ALEN);
 513                 memcpy(src, hdr->addr3, ETH_ALEN);
 514                 break;
 515         case IEEE80211_FCTL_TODS:
 516                 memcpy(dst, hdr->addr3, ETH_ALEN);
 517                 memcpy(src, hdr->addr2, ETH_ALEN);
 518                 break;
 519         case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
 520                 if (skb->len < IEEE80211_4ADDR_LEN)
 521                         goto rx_dropped;
 522                 memcpy(dst, hdr->addr3, ETH_ALEN);
 523                 memcpy(src, hdr->addr4, ETH_ALEN);
 524                 break;
 525         case 0:
 526                 memcpy(dst, hdr->addr1, ETH_ALEN);
 527                 memcpy(src, hdr->addr2, ETH_ALEN);
 528                 break;
 529         }
 530
 531 #ifdef NOT_YET
 532         if (hostap_rx_frame_wds(ieee, hdr, fc, &wds))
 533                 goto rx_dropped;
 534         if (wds) {
 535                 skb->dev = dev = wds;
 536                 stats = hostap_get_stats(dev);
 537         }
 538
 539         if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
 540             (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 541             IEEE80211_FCTL_FROMDS && ieee->stadev
 542             && !compare_ether_addr(hdr->addr2, ieee->assoc_ap_addr)) {
 543                 /* Frame from BSSID of the AP for which we are a client */
 544                 skb->dev = dev = ieee->stadev;
 545                 stats = hostap_get_stats(dev);
 546                 from_assoc_ap = 1;
 547         }
 548 #endif
 549
 550         dev->last_rx = jiffies;
 551
 552 #ifdef NOT_YET
 553         if ((ieee->iw_mode == IW_MODE_MASTER ||
 554              ieee->iw_mode == IW_MODE_REPEAT) && !from_assoc_ap) {
 555                 switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats,
 556                                              wds != NULL)) {
 557                 case AP_RX_CONTINUE_NOT_AUTHORIZED:
 558                         frame_authorized = 0;
 559                         break;
 560                 case AP_RX_CONTINUE:
 561                         frame_authorized = 1;
 562                         break;
 563                 case AP_RX_DROP:
 564                         goto rx_dropped;
 565                 case AP_RX_EXIT:
 566                         goto rx_exit;
 567                 }
 568         }
 569 #endif
 570
 571         /* Nullfunc frames may have PS-bit set, so they must be passed to
 572          * hostap_handle_sta_rx() before being dropped here. */
 573
 574         stype &= ~IEEE80211_STYPE_QOS_DATA;
 575
 576         if (stype != IEEE80211_STYPE_DATA &&
 577             stype != IEEE80211_STYPE_DATA_CFACK &&
 578             stype != IEEE80211_STYPE_DATA_CFPOLL &&
 579             stype != IEEE80211_STYPE_DATA_CFACKPOLL) {
 580                 if (stype != IEEE80211_STYPE_NULLFUNC)
 581                         IEEE80211_DEBUG_DROP("RX: dropped data frame "
 582                                              "with no data (type=0x%02x, "
 583                                              "subtype=0x%02x, len=%d)\n",
 584                                              type, stype, skb->len);
 585                 goto rx_dropped;
 586         }
 587
 588         /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
 589
 590         if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
 591             (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0)
 592                 goto rx_dropped;
 593
 594         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 595
 596         /* skb: hdr + (possibly fragmented) plaintext payload */
 597         // PR: FIXME: hostap has additional conditions in the "if" below:
 598         // ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
 599         if ((frag != 0) || (fc & IEEE80211_FCTL_MOREFRAGS)) {
 600                 int flen;
 601                 struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr);
 602                 IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
 603
 604                 if (!frag_skb) {
 605                         IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG,
 606                                         "Rx cannot get skb from fragment "
 607                                         "cache (morefrag=%d seq=%u frag=%u)\n",
 608                                         (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
 609                                         WLAN_GET_SEQ_SEQ(sc), frag);
 610                         goto rx_dropped;
 611                 }
 612
 613                 flen = skb->len;
 614                 if (frag != 0)
 615                         flen -= hdrlen;
 616
 617                 if (frag_skb->tail + flen > frag_skb->end) {
 618                         printk(KERN_WARNING "%s: host decrypted and "
 619                                "reassembled frame did not fit skb\n",
 620                                dev->name);
 621                         ieee80211_frag_cache_invalidate(ieee, hdr);
 622                         goto rx_dropped;
 623                 }
 624
 625                 if (frag == 0) {
 626                         /* copy first fragment (including full headers) into
 627                          * beginning of the fragment cache skb */
 628                         skb_copy_from_linear_data(skb, skb_put(frag_skb, flen), flen);
 629                 } else {
 630                         /* append frame payload to the end of the fragment
 631                          * cache skb */
 632                         skb_copy_from_linear_data_offset(skb, hdrlen,
 633                                       skb_put(frag_skb, flen), flen);
 634                 }
 635                 dev_kfree_skb_any(skb);
 636                 skb = NULL;
 637
 638                 if (fc & IEEE80211_FCTL_MOREFRAGS) {
 639                         /* more fragments expected - leave the skb in fragment
 640                          * cache for now; it will be delivered to upper layers
 641                          * after all fragments have been received */
 642                         goto rx_exit;
 643                 }
 644
 645                 /* this was the last fragment and the frame will be
 646                  * delivered, so remove skb from fragment cache */
 647                 skb = frag_skb;
 648                 hdr = (struct ieee80211_hdr_4addr *)skb->data;
 649                 ieee80211_frag_cache_invalidate(ieee, hdr);
 650         }
 651
 652         /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
 653          * encrypted/authenticated */
 654         if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
 655             ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
 656                 goto rx_dropped;
 657
 658         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 659         if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep) {
 660                 if (            /*ieee->ieee802_1x && */
 661                            ieee80211_is_eapol_frame(ieee, skb)) {
 662                         /* pass unencrypted EAPOL frames even if encryption is
 663                          * configured */
 664                 } else {
 665                         IEEE80211_DEBUG_DROP("encryption configured, but RX "
 666                                              "frame not encrypted (SA="
 667                                              MAC_FMT ")\n",
 668                                              hdr->addr2[0], hdr->addr2[1],
 669                                              hdr->addr2[2], hdr->addr2[3],
 670                                              hdr->addr2[4], hdr->addr2[5]);
 671                         goto rx_dropped;
 672                 }
 673         }
 674
 675         if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep &&
 676             !ieee80211_is_eapol_frame(ieee, skb)) {
 677                 IEEE80211_DEBUG_DROP("dropped unencrypted RX data "
 678                                      "frame from " MAC_FMT
 679                                      " (drop_unencrypted=1)\n",
 680                                      hdr->addr2[0], hdr->addr2[1],
 681                                      hdr->addr2[2], hdr->addr2[3],
 682                                      hdr->addr2[4], hdr->addr2[5]);
 683                 goto rx_dropped;
 684         }
 685
 686         /* If the frame was decrypted in hardware, we may need to strip off
 687          * any security data (IV, ICV, etc) that was left behind */
 688         if (!can_be_decrypted && (fc & IEEE80211_FCTL_PROTECTED) &&
 689             ieee->host_strip_iv_icv) {
 690                 int trimlen = 0;
 691
 692                 /* Top two-bits of byte 3 are the key index */
 693                 if (skb->len >= hdrlen + 3)
 694                         keyidx = skb->data[hdrlen + 3] >> 6;
 695
 696                 /* To strip off any security data which appears before the
 697                  * payload, we simply increase hdrlen (as the header gets
 698                  * chopped off immediately below). For the security data which
 699                  * appears after the payload, we use skb_trim. */
 700
 701                 switch (ieee->sec.encode_alg[keyidx]) {
 702                 case SEC_ALG_WEP:
 703                         /* 4 byte IV */
 704                         hdrlen += 4;
 705                         /* 4 byte ICV */
 706                         trimlen = 4;
 707                         break;
 708                 case SEC_ALG_TKIP:
 709                         /* 4 byte IV, 4 byte ExtIV */
 710                         hdrlen += 8;
 711                         /* 8 byte MIC, 4 byte ICV */
 712                         trimlen = 12;
 713                         break;
 714                 case SEC_ALG_CCMP:
 715                         /* 8 byte CCMP header */
 716                         hdrlen += 8;
 717                         /* 8 byte MIC */
 718                         trimlen = 8;
 719                         break;
 720                 }
 721
 722                 if (skb->len < trimlen)
 723                         goto rx_dropped;
 724
 725                 __skb_trim(skb, skb->len - trimlen);
 726
 727                 if (skb->len < hdrlen)
 728                         goto rx_dropped;
 729         }
 730
 731         /* skb: hdr + (possible reassembled) full plaintext payload */
 732
 733         payload = skb->data + hdrlen;
 734         ethertype = (payload[6] << 8) | payload[7];
 735
 736 #ifdef NOT_YET
 737         /* If IEEE 802.1X is used, check whether the port is authorized to send
 738          * the received frame. */
 739         if (ieee->ieee802_1x && ieee->iw_mode == IW_MODE_MASTER) {
 740                 if (ethertype == ETH_P_PAE) {
 741                         printk(KERN_DEBUG "%s: RX: IEEE 802.1X frame\n",
 742                                dev->name);
 743                         if (ieee->hostapd && ieee->apdev) {
 744                                 /* Send IEEE 802.1X frames to the user
 745                                  * space daemon for processing */
 746                                 prism2_rx_80211(ieee->apdev, skb, rx_stats,
 747                                                 PRISM2_RX_MGMT);
 748                                 ieee->apdevstats.rx_packets++;
 749                                 ieee->apdevstats.rx_bytes += skb->len;
 750                                 goto rx_exit;
 751                         }
 752                 } else if (!frame_authorized) {
 753                         printk(KERN_DEBUG "%s: dropped frame from "
 754                                "unauthorized port (IEEE 802.1X): "
 755                                "ethertype=0x%04x\n", dev->name, ethertype);
 756                         goto rx_dropped;
 757                 }
 758         }
 759 #endif
 760
 761         /* convert hdr + possible LLC headers into Ethernet header */
 762         if (skb->len - hdrlen >= 8 &&
 763             ((memcmp(payload, rfc1042_header, SNAP_SIZE) == 0 &&
 764               ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
 765              memcmp(payload, bridge_tunnel_header, SNAP_SIZE) == 0)) {
 766                 /* remove RFC1042 or Bridge-Tunnel encapsulation and
 767                  * replace EtherType */
 768                 skb_pull(skb, hdrlen + SNAP_SIZE);
 769                 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
 770                 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
 771         } else {
 772                 __be16 len;
 773                 /* Leave Ethernet header part of hdr and full payload */
 774                 skb_pull(skb, hdrlen);
 775                 len = htons(skb->len);
 776                 memcpy(skb_push(skb, 2), &len, 2);
 777                 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
 778                 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
 779         }
 780
 781 #ifdef NOT_YET
 782         if (wds && ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 783                     IEEE80211_FCTL_TODS) && skb->len >= ETH_HLEN + ETH_ALEN) {
 784                 /* Non-standard frame: get addr4 from its bogus location after
 785                  * the payload */
 786                 skb_copy_to_linear_data_offset(skb, ETH_ALEN,
 787                                                skb->data + skb->len - ETH_ALEN,
 788                                                ETH_ALEN);
 789                 skb_trim(skb, skb->len - ETH_ALEN);
 790         }
 791 #endif
 792
 793         stats->rx_packets++;
 794         stats->rx_bytes += skb->len;
 795
 796 #ifdef NOT_YET
 797         if (ieee->iw_mode == IW_MODE_MASTER && !wds && ieee->ap->bridge_packets) {
 798                 if (dst[0] & 0x01) {
 799                         /* copy multicast frame both to the higher layers and
 800                          * to the wireless media */
 801                         ieee->ap->bridged_multicast++;
 802                         skb2 = skb_clone(skb, GFP_ATOMIC);
 803                         if (skb2 == NULL)
 804                                 printk(KERN_DEBUG "%s: skb_clone failed for "
 805                                        "multicast frame\n", dev->name);
 806                 } else if (hostap_is_sta_assoc(ieee->ap, dst)) {
 807                         /* send frame directly to the associated STA using
 808                          * wireless media and not passing to higher layers */
 809                         ieee->ap->bridged_unicast++;
 810                         skb2 = skb;
 811                         skb = NULL;
 812                 }
 813         }
 814
 815         if (skb2 != NULL) {
 816                 /* send to wireless media */
 817                 skb2->dev = dev;
 818                 skb2->protocol = htons(ETH_P_802_3);
 819                 skb_reset_mac_header(skb2);
 820                 skb_reset_network_header(skb2);
 821                 /* skb2->network_header += ETH_HLEN; */
 822                 dev_queue_xmit(skb2);
 823         }
 824 #endif
 825
 826         if (skb) {
 827                 skb->protocol = eth_type_trans(skb, dev);
 828                 memset(skb->cb, 0, sizeof(skb->cb));
 829                 skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
 830                 if (netif_rx(skb) == NET_RX_DROP) {
 831                         /* netif_rx always succeeds, but it might drop
 832                          * the packet.  If it drops the packet, we log that
 833                          * in our stats. */
 834                         IEEE80211_DEBUG_DROP
 835                             ("RX: netif_rx dropped the packet\n");
 836                         stats->rx_dropped++;
 837                 }
 838         }
 839
 840       rx_exit:
 841 #ifdef NOT_YET
 842         if (sta)
 843                 hostap_handle_sta_release(sta);
 844 #endif
 845         return 1;
 846
 847       rx_dropped:
 848         stats->rx_dropped++;
 849
 850         /* Returning 0 indicates to caller that we have not handled the SKB--
 851          * so it is still allocated and can be used again by underlying
 852          * hardware as a DMA target */
 853         return 0;
 854 }
 855
 856 /* Filter out unrelated packets, call ieee80211_rx[_mgt]
 857  * This function takes over the skb, it should not be used again after calling
 858  * this function. */
 859 void ieee80211_rx_any(struct ieee80211_device *ieee,
 860                      struct sk_buff *skb, struct ieee80211_rx_stats *stats)
 861 {
 862         struct ieee80211_hdr_4addr *hdr;
 863         int is_packet_for_us;
 864         u16 fc;
 865
 866         if (ieee->iw_mode == IW_MODE_MONITOR) {
 867                 if (!ieee80211_rx(ieee, skb, stats))
 868                         dev_kfree_skb_irq(skb);
 869                 return;
 870         }
 871
 872         if (skb->len < sizeof(struct ieee80211_hdr))
 873                 goto drop_free;
 874
 875         hdr = (struct ieee80211_hdr_4addr *)skb->data;
 876         fc = le16_to_cpu(hdr->frame_ctl);
 877
 878         if ((fc & IEEE80211_FCTL_VERS) != 0)
 879                 goto drop_free;
 880
 881         switch (fc & IEEE80211_FCTL_FTYPE) {
 882         case IEEE80211_FTYPE_MGMT:
 883                 if (skb->len < sizeof(struct ieee80211_hdr_3addr))
 884                         goto drop_free;
 885                 ieee80211_rx_mgt(ieee, hdr, stats);
 886                 dev_kfree_skb_irq(skb);
 887                 return;
 888         case IEEE80211_FTYPE_DATA:
 889                 break;
 890         case IEEE80211_FTYPE_CTL:
 891                 return;
 892         default:
 893                 return;
 894         }
 895
 896         is_packet_for_us = 0;
 897         switch (ieee->iw_mode) {
 898         case IW_MODE_ADHOC:
 899                 /* our BSS and not from/to DS */
 900                 if (memcmp(hdr->addr3, ieee->bssid, ETH_ALEN) == 0)
 901                 if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == 0) {
 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                                 is_packet_for_us = 1;
 911                 }
 912                 break;
 913         case IW_MODE_INFRA:
 914                 /* our BSS (== from our AP) and from DS */
 915                 if (memcmp(hdr->addr2, ieee->bssid, ETH_ALEN) == 0)
 916                 if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS) {
 917                         /* promisc: get all */
 918                         if (ieee->dev->flags & IFF_PROMISC)
 919                                 is_packet_for_us = 1;
 920                         /* to us */
 921                         else if (memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN) == 0)
 922                                 is_packet_for_us = 1;
 923                         /* mcast */
 924                         else if (is_multicast_ether_addr(hdr->addr1)) {
 925                                 /* not our own packet bcasted from AP */
 926                                 if (memcmp(hdr->addr3, ieee->dev->dev_addr, ETH_ALEN))
 927                                         is_packet_for_us = 1;
 928                         }
 929                 }
 930                 break;
 931         default:
 932                 /* ? */
 933                 break;
 934         }
 935
 936         if (is_packet_for_us)
 937                 if (!ieee80211_rx(ieee, skb, stats))
 938                         dev_kfree_skb_irq(skb);
 939         return;
 940
 941 drop_free:
 942         dev_kfree_skb_irq(skb);
 943         ieee->stats.rx_dropped++;
 944         return;
 945 }
 946
 947 #define MGMT_FRAME_FIXED_PART_LENGTH            0x24
 948
 949 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
 950
 951 /*
 952 * Make ther structure we read from the beacon packet has
 953 * the right values
 954 */
 955 static int ieee80211_verify_qos_info(struct ieee80211_qos_information_element
 956                                      *info_element, int sub_type)
 957 {
 958
 959         if (info_element->qui_subtype != sub_type)
 960                 return -1;
 961         if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
 962                 return -1;
 963         if (info_element->qui_type != QOS_OUI_TYPE)
 964                 return -1;
 965         if (info_element->version != QOS_VERSION_1)
 966                 return -1;
 967
 968         return 0;
 969 }
 970
 971 /*
 972  * Parse a QoS parameter element
 973  */
 974 static int ieee80211_read_qos_param_element(struct ieee80211_qos_parameter_info
 975                                             *element_param, struct ieee80211_info_element
 976                                             *info_element)
 977 {
 978         int ret = 0;
 979         u16 size = sizeof(struct ieee80211_qos_parameter_info) - 2;
 980
 981         if ((info_element == NULL) || (element_param == NULL))
 982                 return -1;
 983
 984         if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
 985                 memcpy(element_param->info_element.qui, info_element->data,
 986                        info_element->len);
 987                 element_param->info_element.elementID = info_element->id;
 988                 element_param->info_element.length = info_element->len;
 989         } else
 990                 ret = -1;
 991         if (ret == 0)
 992                 ret = ieee80211_verify_qos_info(&element_param->info_element,
 993                                                 QOS_OUI_PARAM_SUB_TYPE);
 994         return ret;
 995 }
 996
 997 /*
 998  * Parse a QoS information element
 999  */
1000 static int ieee80211_read_qos_info_element(struct
1001                                            ieee80211_qos_information_element
1002                                            *element_info, struct ieee80211_info_element
1003                                            *info_element)
1004 {
1005         int ret = 0;
1006         u16 size = sizeof(struct ieee80211_qos_information_element) - 2;
1007
1008         if (element_info == NULL)
1009                 return -1;
1010         if (info_element == NULL)
1011                 return -1;
1012
1013         if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
1014                 memcpy(element_info->qui, info_element->data,
1015                        info_element->len);
1016                 element_info->elementID = info_element->id;
1017                 element_info->length = info_element->len;
1018         } else
1019                 ret = -1;
1020
1021         if (ret == 0)
1022                 ret = ieee80211_verify_qos_info(element_info,
1023                                                 QOS_OUI_INFO_SUB_TYPE);
1024         return ret;
1025 }
1026
1027 /*
1028  * Write QoS parameters from the ac parameters.
1029  */
1030 static int ieee80211_qos_convert_ac_to_parameters(struct
1031                                                   ieee80211_qos_parameter_info
1032                                                   *param_elm, struct
1033                                                   ieee80211_qos_parameters
1034                                                   *qos_param)
1035 {
1036         int rc = 0;
1037         int i;
1038         struct ieee80211_qos_ac_parameter *ac_params;
1039         u32 txop;
1040         u8 cw_min;
1041         u8 cw_max;
1042
1043         for (i = 0; i < QOS_QUEUE_NUM; i++) {
1044                 ac_params = &(param_elm->ac_params_record[i]);
1045
1046                 qos_param->aifs[i] = (ac_params->aci_aifsn) & 0x0F;
1047                 qos_param->aifs[i] -= (qos_param->aifs[i] < 2) ? 0 : 2;
1048
1049                 cw_min = ac_params->ecw_min_max & 0x0F;
1050                 qos_param->cw_min[i] = cpu_to_le16((1 << cw_min) - 1);
1051
1052                 cw_max = (ac_params->ecw_min_max & 0xF0) >> 4;
1053                 qos_param->cw_max[i] = cpu_to_le16((1 << cw_max) - 1);
1054
1055                 qos_param->flag[i] =
1056                     (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1057
1058                 txop = le16_to_cpu(ac_params->tx_op_limit) * 32;
1059                 qos_param->tx_op_limit[i] = cpu_to_le16(txop);
1060         }
1061         return rc;
1062 }
1063
1064 /*
1065  * we have a generic data element which it may contain QoS information or
1066  * parameters element. check the information element length to decide
1067  * which type to read
1068  */
1069 static int ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element
1070                                              *info_element,
1071                                              struct ieee80211_network *network)
1072 {
1073         int rc = 0;
1074         struct ieee80211_qos_parameters *qos_param = NULL;
1075         struct ieee80211_qos_information_element qos_info_element;
1076
1077         rc = ieee80211_read_qos_info_element(&qos_info_element, info_element);
1078
1079         if (rc == 0) {
1080                 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1081                 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1082         } else {
1083                 struct ieee80211_qos_parameter_info param_element;
1084
1085                 rc = ieee80211_read_qos_param_element(&param_element,
1086                                                       info_element);
1087                 if (rc == 0) {
1088                         qos_param = &(network->qos_data.parameters);
1089                         ieee80211_qos_convert_ac_to_parameters(&param_element,
1090                                                                qos_param);
1091                         network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1092                         network->qos_data.param_count =
1093                             param_element.info_element.ac_info & 0x0F;
1094                 }
1095         }
1096
1097         if (rc == 0) {
1098                 IEEE80211_DEBUG_QOS("QoS is supported\n");
1099                 network->qos_data.supported = 1;
1100         }
1101         return rc;
1102 }
1103
1104 #ifdef CONFIG_IEEE80211_DEBUG
1105 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
1106
1107 static const char *get_info_element_string(u16 id)
1108 {
1109         switch (id) {
1110                 MFIE_STRING(SSID);
1111                 MFIE_STRING(RATES);
1112                 MFIE_STRING(FH_SET);
1113                 MFIE_STRING(DS_SET);
1114                 MFIE_STRING(CF_SET);
1115                 MFIE_STRING(TIM);
1116                 MFIE_STRING(IBSS_SET);
1117                 MFIE_STRING(COUNTRY);
1118                 MFIE_STRING(HOP_PARAMS);
1119                 MFIE_STRING(HOP_TABLE);
1120                 MFIE_STRING(REQUEST);
1121                 MFIE_STRING(CHALLENGE);
1122                 MFIE_STRING(POWER_CONSTRAINT);
1123                 MFIE_STRING(POWER_CAPABILITY);
1124                 MFIE_STRING(TPC_REQUEST);
1125                 MFIE_STRING(TPC_REPORT);
1126                 MFIE_STRING(SUPP_CHANNELS);
1127                 MFIE_STRING(CSA);
1128                 MFIE_STRING(MEASURE_REQUEST);
1129                 MFIE_STRING(MEASURE_REPORT);
1130                 MFIE_STRING(QUIET);
1131                 MFIE_STRING(IBSS_DFS);
1132                 MFIE_STRING(ERP_INFO);
1133                 MFIE_STRING(RSN);
1134                 MFIE_STRING(RATES_EX);
1135                 MFIE_STRING(GENERIC);
1136                 MFIE_STRING(QOS_PARAMETER);
1137         default:
1138                 return "UNKNOWN";
1139         }
1140 }
1141 #endif
1142
1143 static int ieee80211_parse_info_param(struct ieee80211_info_element
1144                                       *info_element, u16 length,
1145                                       struct ieee80211_network *network)
1146 {
1147         u8 i;
1148 #ifdef CONFIG_IEEE80211_DEBUG
1149         char rates_str[64];
1150         char *p;
1151 #endif
1152
1153         while (length >= sizeof(*info_element)) {
1154                 if (sizeof(*info_element) + info_element->len > length) {
1155                         IEEE80211_DEBUG_MGMT("Info elem: parse failed: "
1156                                              "info_element->len + 2 > left : "
1157                                              "info_element->len+2=%zd left=%d, id=%d.\n",
1158                                              info_element->len +
1159                                              sizeof(*info_element),
1160                                              length, info_element->id);
1161                         /* We stop processing but don't return an error here
1162                          * because some misbehaviour APs break this rule. ie.
1163                          * Orinoco AP1000. */
1164                         break;
1165                 }
1166
1167                 switch (info_element->id) {
1168                 case MFIE_TYPE_SSID:
1169                         if (ieee80211_is_empty_essid(info_element->data,
1170                                                      info_element->len)) {
1171                                 network->flags |= NETWORK_EMPTY_ESSID;
1172                                 break;
1173                         }
1174
1175                         network->ssid_len = min(info_element->len,
1176                                                 (u8) IW_ESSID_MAX_SIZE);
1177                         memcpy(network->ssid, info_element->data,
1178                                network->ssid_len);
1179                         if (network->ssid_len < IW_ESSID_MAX_SIZE)
1180                                 memset(network->ssid + network->ssid_len, 0,
1181                                        IW_ESSID_MAX_SIZE - network->ssid_len);
1182
1183                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
1184                                              network->ssid, network->ssid_len);
1185                         break;
1186
1187                 case MFIE_TYPE_RATES:
1188 #ifdef CONFIG_IEEE80211_DEBUG
1189                         p = rates_str;
1190 #endif
1191                         network->rates_len = min(info_element->len,
1192                                                  MAX_RATES_LENGTH);
1193                         for (i = 0; i < network->rates_len; i++) {
1194                                 network->rates[i] = info_element->data[i];
1195 #ifdef CONFIG_IEEE80211_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("MFIE_TYPE_RATES: '%s' (%d)\n",
1211                                              rates_str, network->rates_len);
1212                         break;
1213
1214                 case MFIE_TYPE_RATES_EX:
1215 #ifdef CONFIG_IEEE80211_DEBUG
1216                         p = rates_str;
1217 #endif
1218                         network->rates_ex_len = min(info_element->len,
1219                                                     MAX_RATES_EX_LENGTH);
1220                         for (i = 0; i < network->rates_ex_len; i++) {
1221                                 network->rates_ex[i] = info_element->data[i];
1222 #ifdef CONFIG_IEEE80211_DEBUG
1223                                 p += snprintf(p, sizeof(rates_str) -
1224                                               (p - rates_str), "%02X ",
1225                                               network->rates[i]);
1226 #endif
1227                                 if (ieee80211_is_ofdm_rate
1228                                     (info_element->data[i])) {
1229                                         network->flags |= NETWORK_HAS_OFDM;
1230                                         if (info_element->data[i] &
1231                                             IEEE80211_BASIC_RATE_MASK)
1232                                                 network->flags &=
1233                                                     ~NETWORK_HAS_CCK;
1234                                 }
1235                         }
1236
1237                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1238                                              rates_str, network->rates_ex_len);
1239                         break;
1240
1241                 case MFIE_TYPE_DS_SET:
1242                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
1243                                              info_element->data[0]);
1244                         network->channel = info_element->data[0];
1245                         break;
1246
1247                 case MFIE_TYPE_FH_SET:
1248                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
1249                         break;
1250
1251                 case MFIE_TYPE_CF_SET:
1252                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
1253                         break;
1254
1255                 case MFIE_TYPE_TIM:
1256                         network->tim.tim_count = info_element->data[0];
1257                         network->tim.tim_period = info_element->data[1];
1258                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_TIM: partially ignored\n");
1259                         break;
1260
1261                 case MFIE_TYPE_ERP_INFO:
1262                         network->erp_value = info_element->data[0];
1263                         network->flags |= NETWORK_HAS_ERP_VALUE;
1264                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1265                                              network->erp_value);
1266                         break;
1267
1268                 case MFIE_TYPE_IBSS_SET:
1269                         network->atim_window = info_element->data[0];
1270                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
1271                                              network->atim_window);
1272                         break;
1273
1274                 case MFIE_TYPE_CHALLENGE:
1275                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
1276                         break;
1277
1278                 case MFIE_TYPE_GENERIC:
1279                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
1280                                              info_element->len);
1281                         if (!ieee80211_parse_qos_info_param_IE(info_element,
1282                                                                network))
1283                                 break;
1284
1285                         if (info_element->len >= 4 &&
1286                             info_element->data[0] == 0x00 &&
1287                             info_element->data[1] == 0x50 &&
1288                             info_element->data[2] == 0xf2 &&
1289                             info_element->data[3] == 0x01) {
1290                                 network->wpa_ie_len = min(info_element->len + 2,
1291                                                           MAX_WPA_IE_LEN);
1292                                 memcpy(network->wpa_ie, info_element,
1293                                        network->wpa_ie_len);
1294                         }
1295                         break;
1296
1297                 case MFIE_TYPE_RSN:
1298                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
1299                                              info_element->len);
1300                         network->rsn_ie_len = min(info_element->len + 2,
1301                                                   MAX_WPA_IE_LEN);
1302                         memcpy(network->rsn_ie, info_element,
1303                                network->rsn_ie_len);
1304                         break;
1305
1306                 case MFIE_TYPE_QOS_PARAMETER:
1307                         printk(KERN_ERR
1308                                "QoS Error need to parse QOS_PARAMETER IE\n");
1309                         break;
1310                         /* 802.11h */
1311                 case MFIE_TYPE_POWER_CONSTRAINT:
1312                         network->power_constraint = info_element->data[0];
1313                         network->flags |= NETWORK_HAS_POWER_CONSTRAINT;
1314                         break;
1315
1316                 case MFIE_TYPE_CSA:
1317                         network->power_constraint = info_element->data[0];
1318                         network->flags |= NETWORK_HAS_CSA;
1319                         break;
1320
1321                 case MFIE_TYPE_QUIET:
1322                         network->quiet.count = info_element->data[0];
1323                         network->quiet.period = info_element->data[1];
1324                         network->quiet.duration = info_element->data[2];
1325                         network->quiet.offset = info_element->data[3];
1326                         network->flags |= NETWORK_HAS_QUIET;
1327                         break;
1328
1329                 case MFIE_TYPE_IBSS_DFS:
1330                         if (network->ibss_dfs)
1331                                 break;
1332                         network->ibss_dfs = kmemdup(info_element->data,
1333                                                     info_element->len,
1334                                                     GFP_ATOMIC);
1335                         if (!network->ibss_dfs)
1336                                 return 1;
1337                         network->flags |= NETWORK_HAS_IBSS_DFS;
1338                         break;
1339
1340                 case MFIE_TYPE_TPC_REPORT:
1341                         network->tpc_report.transmit_power =
1342                             info_element->data[0];
1343                         network->tpc_report.link_margin = info_element->data[1];
1344                         network->flags |= NETWORK_HAS_TPC_REPORT;
1345                         break;
1346
1347                 default:
1348                         IEEE80211_DEBUG_MGMT
1349                             ("Unsupported info element: %s (%d)\n",
1350                              get_info_element_string(info_element->id),
1351                              info_element->id);
1352                         break;
1353                 }
1354
1355                 length -= sizeof(*info_element) + info_element->len;
1356                 info_element =
1357                     (struct ieee80211_info_element *)&info_element->
1358                     data[info_element->len];
1359         }
1360
1361         return 0;
1362 }
1363
1364 static int ieee80211_handle_assoc_resp(struct ieee80211_device *ieee, struct ieee80211_assoc_response
1365                                        *frame, struct ieee80211_rx_stats *stats)
1366 {
1367         struct ieee80211_network network_resp = {
1368                 .ibss_dfs = NULL,
1369         };
1370         struct ieee80211_network *network = &network_resp;
1371         struct net_device *dev = ieee->dev;
1372
1373         network->flags = 0;
1374         network->qos_data.active = 0;
1375         network->qos_data.supported = 0;
1376         network->qos_data.param_count = 0;
1377         network->qos_data.old_param_count = 0;
1378
1379         //network->atim_window = le16_to_cpu(frame->aid) & (0x3FFF);
1380         network->atim_window = le16_to_cpu(frame->aid);
1381         network->listen_interval = le16_to_cpu(frame->status);
1382         memcpy(network->bssid, frame->header.addr3, ETH_ALEN);
1383         network->capability = le16_to_cpu(frame->capability);
1384         network->last_scanned = jiffies;
1385         network->rates_len = network->rates_ex_len = 0;
1386         network->last_associate = 0;
1387         network->ssid_len = 0;
1388         network->erp_value =
1389             (network->capability & WLAN_CAPABILITY_IBSS) ? 0x3 : 0x0;
1390
1391         if (stats->freq == IEEE80211_52GHZ_BAND) {
1392                 /* for A band (No DS info) */
1393                 network->channel = stats->received_channel;
1394         } else
1395                 network->flags |= NETWORK_HAS_CCK;
1396
1397         network->wpa_ie_len = 0;
1398         network->rsn_ie_len = 0;
1399
1400         if (ieee80211_parse_info_param
1401             (frame->info_element, stats->len - sizeof(*frame), network))
1402                 return 1;
1403
1404         network->mode = 0;
1405         if (stats->freq == IEEE80211_52GHZ_BAND)
1406                 network->mode = IEEE_A;
1407         else {
1408                 if (network->flags & NETWORK_HAS_OFDM)
1409                         network->mode |= IEEE_G;
1410                 if (network->flags & NETWORK_HAS_CCK)
1411                         network->mode |= IEEE_B;
1412         }
1413
1414         if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
1415                 network->flags |= NETWORK_EMPTY_ESSID;
1416
1417         memcpy(&network->stats, stats, sizeof(network->stats));
1418
1419         if (ieee->handle_assoc_response != NULL)
1420                 ieee->handle_assoc_response(dev, frame, network);
1421
1422         return 0;
1423 }
1424
1425 /***************************************************/
1426
1427 static int ieee80211_network_init(struct ieee80211_device *ieee, struct ieee80211_probe_response
1428                                          *beacon,
1429                                          struct ieee80211_network *network,
1430                                          struct ieee80211_rx_stats *stats)
1431 {
1432         DECLARE_MAC_BUF(mac);
1433
1434         network->qos_data.active = 0;
1435         network->qos_data.supported = 0;
1436         network->qos_data.param_count = 0;
1437         network->qos_data.old_param_count = 0;
1438
1439         /* Pull out fixed field data */
1440         memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
1441         network->capability = le16_to_cpu(beacon->capability);
1442         network->last_scanned = jiffies;
1443         network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
1444         network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
1445         network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
1446         /* Where to pull this? beacon->listen_interval; */
1447         network->listen_interval = 0x0A;
1448         network->rates_len = network->rates_ex_len = 0;
1449         network->last_associate = 0;
1450         network->ssid_len = 0;
1451         network->flags = 0;
1452         network->atim_window = 0;
1453         network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
1454             0x3 : 0x0;
1455
1456         if (stats->freq == IEEE80211_52GHZ_BAND) {
1457                 /* for A band (No DS info) */
1458                 network->channel = stats->received_channel;
1459         } else
1460                 network->flags |= NETWORK_HAS_CCK;
1461
1462         network->wpa_ie_len = 0;
1463         network->rsn_ie_len = 0;
1464
1465         if (ieee80211_parse_info_param
1466             (beacon->info_element, stats->len - sizeof(*beacon), network))
1467                 return 1;
1468
1469         network->mode = 0;
1470         if (stats->freq == IEEE80211_52GHZ_BAND)
1471                 network->mode = IEEE_A;
1472         else {
1473                 if (network->flags & NETWORK_HAS_OFDM)
1474                         network->mode |= IEEE_G;
1475                 if (network->flags & NETWORK_HAS_CCK)
1476                         network->mode |= IEEE_B;
1477         }
1478
1479         if (network->mode == 0) {
1480                 IEEE80211_DEBUG_SCAN("Filtered out '%s (%s)' "
1481                                      "network.\n",
1482                                      escape_essid(network->ssid,
1483                                                   network->ssid_len),
1484                                      print_mac(mac, network->bssid));
1485                 return 1;
1486         }
1487
1488         if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
1489                 network->flags |= NETWORK_EMPTY_ESSID;
1490
1491         memcpy(&network->stats, stats, sizeof(network->stats));
1492
1493         return 0;
1494 }
1495
1496 static inline int is_same_network(struct ieee80211_network *src,
1497                                   struct ieee80211_network *dst)
1498 {
1499         /* A network is only a duplicate if the channel, BSSID, and ESSID
1500          * all match.  We treat all <hidden> with the same BSSID and channel
1501          * as one network */
1502         return ((src->ssid_len == dst->ssid_len) &&
1503                 (src->channel == dst->channel) &&
1504                 !compare_ether_addr(src->bssid, dst->bssid) &&
1505                 !memcmp(src->ssid, dst->ssid, src->ssid_len));
1506 }
1507
1508 static void update_network(struct ieee80211_network *dst,
1509                                   struct ieee80211_network *src)
1510 {
1511         int qos_active;
1512         u8 old_param;
1513         DECLARE_MAC_BUF(mac);
1514
1515         ieee80211_network_reset(dst);
1516         dst->ibss_dfs = src->ibss_dfs;
1517
1518         /* We only update the statistics if they were created by receiving
1519          * the network information on the actual channel the network is on.
1520          *
1521          * This keeps beacons received on neighbor channels from bringing
1522          * down the signal level of an AP. */
1523         if (dst->channel == src->stats.received_channel)
1524                 memcpy(&dst->stats, &src->stats,
1525                        sizeof(struct ieee80211_rx_stats));
1526         else
1527                 IEEE80211_DEBUG_SCAN("Network %s info received "
1528                         "off channel (%d vs. %d)\n", print_mac(mac, src->bssid),
1529                         dst->channel, src->stats.received_channel);
1530
1531         dst->capability = src->capability;
1532         memcpy(dst->rates, src->rates, src->rates_len);
1533         dst->rates_len = src->rates_len;
1534         memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
1535         dst->rates_ex_len = src->rates_ex_len;
1536
1537         dst->mode = src->mode;
1538         dst->flags = src->flags;
1539         dst->time_stamp[0] = src->time_stamp[0];
1540         dst->time_stamp[1] = src->time_stamp[1];
1541
1542         dst->beacon_interval = src->beacon_interval;
1543         dst->listen_interval = src->listen_interval;
1544         dst->atim_window = src->atim_window;
1545         dst->erp_value = src->erp_value;
1546         dst->tim = src->tim;
1547
1548         memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
1549         dst->wpa_ie_len = src->wpa_ie_len;
1550         memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
1551         dst->rsn_ie_len = src->rsn_ie_len;
1552
1553         dst->last_scanned = jiffies;
1554         qos_active = src->qos_data.active;
1555         old_param = dst->qos_data.old_param_count;
1556         if (dst->flags & NETWORK_HAS_QOS_MASK)
1557                 memcpy(&dst->qos_data, &src->qos_data,
1558                        sizeof(struct ieee80211_qos_data));
1559         else {
1560                 dst->qos_data.supported = src->qos_data.supported;
1561                 dst->qos_data.param_count = src->qos_data.param_count;
1562         }
1563
1564         if (dst->qos_data.supported == 1) {
1565                 if (dst->ssid_len)
1566                         IEEE80211_DEBUG_QOS
1567                             ("QoS the network %s is QoS supported\n",
1568                              dst->ssid);
1569                 else
1570                         IEEE80211_DEBUG_QOS
1571                             ("QoS the network is QoS supported\n");
1572         }
1573         dst->qos_data.active = qos_active;
1574         dst->qos_data.old_param_count = old_param;
1575
1576         /* dst->last_associate is not overwritten */
1577 }
1578
1579 static inline int is_beacon(__le16 fc)
1580 {
1581         return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON);
1582 }
1583
1584 static void ieee80211_process_probe_response(struct ieee80211_device
1585                                                     *ieee, struct
1586                                                     ieee80211_probe_response
1587                                                     *beacon, struct ieee80211_rx_stats
1588                                                     *stats)
1589 {
1590         struct net_device *dev = ieee->dev;
1591         struct ieee80211_network network = {
1592                 .ibss_dfs = NULL,
1593         };
1594         struct ieee80211_network *target;
1595         struct ieee80211_network *oldest = NULL;
1596 #ifdef CONFIG_IEEE80211_DEBUG
1597         struct ieee80211_info_element *info_element = beacon->info_element;
1598 #endif
1599         unsigned long flags;
1600         DECLARE_MAC_BUF(mac);
1601
1602         IEEE80211_DEBUG_SCAN("'%s' (%s"
1603                      "): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
1604                      escape_essid(info_element->data, info_element->len),
1605                      print_mac(mac, beacon->header.addr3),
1606                      (beacon->capability & cpu_to_le16(1 << 0xf)) ? '1' : '0',
1607                      (beacon->capability & cpu_to_le16(1 << 0xe)) ? '1' : '0',
1608                      (beacon->capability & cpu_to_le16(1 << 0xd)) ? '1' : '0',
1609                      (beacon->capability & cpu_to_le16(1 << 0xc)) ? '1' : '0',
1610                      (beacon->capability & cpu_to_le16(1 << 0xb)) ? '1' : '0',
1611                      (beacon->capability & cpu_to_le16(1 << 0xa)) ? '1' : '0',
1612                      (beacon->capability & cpu_to_le16(1 << 0x9)) ? '1' : '0',
1613                      (beacon->capability & cpu_to_le16(1 << 0x8)) ? '1' : '0',
1614                      (beacon->capability & cpu_to_le16(1 << 0x7)) ? '1' : '0',
1615                      (beacon->capability & cpu_to_le16(1 << 0x6)) ? '1' : '0',
1616                      (beacon->capability & cpu_to_le16(1 << 0x5)) ? '1' : '0',
1617                      (beacon->capability & cpu_to_le16(1 << 0x4)) ? '1' : '0',
1618                      (beacon->capability & cpu_to_le16(1 << 0x3)) ? '1' : '0',
1619                      (beacon->capability & cpu_to_le16(1 << 0x2)) ? '1' : '0',
1620                      (beacon->capability & cpu_to_le16(1 << 0x1)) ? '1' : '0',
1621                      (beacon->capability & cpu_to_le16(1 << 0x0)) ? '1' : '0');
1622
1623         if (ieee80211_network_init(ieee, beacon, &network, stats)) {
1624                 IEEE80211_DEBUG_SCAN("Dropped '%s' (%s) via %s.\n",
1625                                      escape_essid(info_element->data,
1626                                                   info_element->len),
1627                                      print_mac(mac, beacon->header.addr3),
1628                                      is_beacon(beacon->header.frame_ctl) ?
1629                                      "BEACON" : "PROBE RESPONSE");
1630                 return;
1631         }
1632
1633         /* The network parsed correctly -- so now we scan our known networks
1634          * to see if we can find it in our list.
1635          *
1636          * NOTE:  This search is definitely not optimized.  Once its doing
1637          *        the "right thing" we'll optimize it for efficiency if
1638          *        necessary */
1639
1640         /* Search for this entry in the list and update it if it is
1641          * already there. */
1642
1643         spin_lock_irqsave(&ieee->lock, flags);
1644
1645         list_for_each_entry(target, &ieee->network_list, list) {
1646                 if (is_same_network(target, &network))
1647                         break;
1648
1649                 if ((oldest == NULL) ||
1650                     (target->last_scanned < oldest->last_scanned))
1651                         oldest = target;
1652         }
1653
1654         /* If we didn't find a match, then get a new network slot to initialize
1655          * with this beacon's information */
1656         if (&target->list == &ieee->network_list) {
1657                 if (list_empty(&ieee->network_free_list)) {
1658                         /* If there are no more slots, expire the oldest */
1659                         list_del(&oldest->list);
1660                         target = oldest;
1661                         IEEE80211_DEBUG_SCAN("Expired '%s' (%s) from "
1662                                              "network list.\n",
1663                                              escape_essid(target->ssid,
1664                                                           target->ssid_len),
1665                                              print_mac(mac, target->bssid));
1666                         ieee80211_network_reset(target);
1667                 } else {
1668                         /* Otherwise just pull from the free list */
1669                         target = list_entry(ieee->network_free_list.next,
1670                                             struct ieee80211_network, list);
1671                         list_del(ieee->network_free_list.next);
1672                 }
1673
1674 #ifdef CONFIG_IEEE80211_DEBUG
1675                 IEEE80211_DEBUG_SCAN("Adding '%s' (%s) via %s.\n",
1676                                      escape_essid(network.ssid,
1677                                                   network.ssid_len),
1678                                      print_mac(mac, network.bssid),
1679                                      is_beacon(beacon->header.frame_ctl) ?
1680                                      "BEACON" : "PROBE RESPONSE");
1681 #endif
1682                 memcpy(target, &network, sizeof(*target));
1683                 network.ibss_dfs = NULL;
1684                 list_add_tail(&target->list, &ieee->network_list);
1685         } else {
1686                 IEEE80211_DEBUG_SCAN("Updating '%s' (%s) via %s.\n",
1687                                      escape_essid(target->ssid,
1688                                                   target->ssid_len),
1689                                      print_mac(mac, target->bssid),
1690                                      is_beacon(beacon->header.frame_ctl) ?
1691                                      "BEACON" : "PROBE RESPONSE");
1692                 update_network(target, &network);
1693                 network.ibss_dfs = NULL;
1694         }
1695
1696         spin_unlock_irqrestore(&ieee->lock, flags);
1697
1698         if (is_beacon(beacon->header.frame_ctl)) {
1699                 if (ieee->handle_beacon != NULL)
1700                         ieee->handle_beacon(dev, beacon, target);
1701         } else {
1702                 if (ieee->handle_probe_response != NULL)
1703                         ieee->handle_probe_response(dev, beacon, target);
1704         }
1705 }
1706
1707 void ieee80211_rx_mgt(struct ieee80211_device *ieee,
1708                       struct ieee80211_hdr_4addr *header,
1709                       struct ieee80211_rx_stats *stats)
1710 {
1711         switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
1712         case IEEE80211_STYPE_ASSOC_RESP:
1713                 IEEE80211_DEBUG_MGMT("received ASSOCIATION RESPONSE (%d)\n",
1714                                      WLAN_FC_GET_STYPE(le16_to_cpu
1715                                                        (header->frame_ctl)));
1716                 ieee80211_handle_assoc_resp(ieee,
1717                                             (struct ieee80211_assoc_response *)
1718                                             header, stats);
1719                 break;
1720
1721         case IEEE80211_STYPE_REASSOC_RESP:
1722                 IEEE80211_DEBUG_MGMT("received REASSOCIATION RESPONSE (%d)\n",
1723                                      WLAN_FC_GET_STYPE(le16_to_cpu
1724                                                        (header->frame_ctl)));
1725                 break;
1726
1727         case IEEE80211_STYPE_PROBE_REQ:
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_probe_request != NULL)
1733                         ieee->handle_probe_request(ieee->dev,
1734                                                    (struct
1735                                                     ieee80211_probe_request *)
1736                                                    header, stats);
1737                 break;
1738
1739         case IEEE80211_STYPE_PROBE_RESP:
1740                 IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
1741                                      WLAN_FC_GET_STYPE(le16_to_cpu
1742                                                        (header->frame_ctl)));
1743                 IEEE80211_DEBUG_SCAN("Probe response\n");
1744                 ieee80211_process_probe_response(ieee,
1745                                                  (struct
1746                                                   ieee80211_probe_response *)
1747                                                  header, stats);
1748                 break;
1749
1750         case IEEE80211_STYPE_BEACON:
1751                 IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
1752                                      WLAN_FC_GET_STYPE(le16_to_cpu
1753                                                        (header->frame_ctl)));
1754                 IEEE80211_DEBUG_SCAN("Beacon\n");
1755                 ieee80211_process_probe_response(ieee,
1756                                                  (struct
1757                                                   ieee80211_probe_response *)
1758                                                  header, stats);
1759                 break;
1760         case IEEE80211_STYPE_AUTH:
1761
1762                 IEEE80211_DEBUG_MGMT("received auth (%d)\n",
1763                                      WLAN_FC_GET_STYPE(le16_to_cpu
1764                                                        (header->frame_ctl)));
1765
1766                 if (ieee->handle_auth != NULL)
1767                         ieee->handle_auth(ieee->dev,
1768                                           (struct ieee80211_auth *)header);
1769                 break;
1770
1771         case IEEE80211_STYPE_DISASSOC:
1772                 if (ieee->handle_disassoc != NULL)
1773                         ieee->handle_disassoc(ieee->dev,
1774                                               (struct ieee80211_disassoc *)
1775                                               header);
1776                 break;
1777
1778         case IEEE80211_STYPE_ACTION:
1779                 IEEE80211_DEBUG_MGMT("ACTION\n");
1780                 if (ieee->handle_action)
1781                         ieee->handle_action(ieee->dev,
1782                                             (struct ieee80211_action *)
1783                                             header, stats);
1784                 break;
1785
1786         case IEEE80211_STYPE_REASSOC_REQ:
1787                 IEEE80211_DEBUG_MGMT("received reassoc (%d)\n",
1788                                      WLAN_FC_GET_STYPE(le16_to_cpu
1789                                                        (header->frame_ctl)));
1790
1791                 IEEE80211_DEBUG_MGMT("%s: IEEE80211_REASSOC_REQ received\n",
1792                                      ieee->dev->name);
1793                 if (ieee->handle_reassoc_request != NULL)
1794                         ieee->handle_reassoc_request(ieee->dev,
1795                                                     (struct ieee80211_reassoc_request *)
1796                                                      header);
1797                 break;
1798
1799         case IEEE80211_STYPE_ASSOC_REQ:
1800                 IEEE80211_DEBUG_MGMT("received assoc (%d)\n",
1801                                      WLAN_FC_GET_STYPE(le16_to_cpu
1802                                                        (header->frame_ctl)));
1803
1804                 IEEE80211_DEBUG_MGMT("%s: IEEE80211_ASSOC_REQ received\n",
1805                                      ieee->dev->name);
1806                 if (ieee->handle_assoc_request != NULL)
1807                         ieee->handle_assoc_request(ieee->dev);
1808                 break;
1809
1810         case IEEE80211_STYPE_DEAUTH:
1811                 IEEE80211_DEBUG_MGMT("DEAUTH\n");
1812                 if (ieee->handle_deauth != NULL)
1813                         ieee->handle_deauth(ieee->dev,
1814                                             (struct ieee80211_deauth *)
1815                                             header);
1816                 break;
1817         default:
1818                 IEEE80211_DEBUG_MGMT("received UNKNOWN (%d)\n",
1819                                      WLAN_FC_GET_STYPE(le16_to_cpu
1820                                                        (header->frame_ctl)));
1821                 IEEE80211_DEBUG_MGMT("%s: Unknown management packet: %d\n",
1822                                      ieee->dev->name,
1823                                      WLAN_FC_GET_STYPE(le16_to_cpu
1824                                                        (header->frame_ctl)));
1825                 break;
1826         }
1827 }
1828
1829 EXPORT_SYMBOL_GPL(ieee80211_rx_any);
1830 EXPORT_SYMBOL(ieee80211_rx_mgt);
1831 EXPORT_SYMBOL(ieee80211_rx);