root/drivers/net/wireless/intel/ipw2x00/libipw_rx.c

DEFINITIONS

1. libipw_monitor_rx
2. libipw_frag_cache_find
3. libipw_frag_cache_get
4. libipw_frag_cache_invalidate
5. libipw_rx_frame_mgmt
6. libipw_is_eapol_frame
7. libipw_rx_frame_decrypt
8. libipw_rx_frame_decrypt_msdu
9. libipw_rx
10. libipw_rx_any
11. libipw_verify_qos_info
12. libipw_read_qos_param_element
13. libipw_read_qos_info_element
14. libipw_qos_convert_ac_to_parameters
15. libipw_parse_qos_info_param_IE
16. get_info_element_string
17. libipw_parse_info_param
18. libipw_handle_assoc_resp
19. libipw_network_init
20. is_same_network
21. update_network
22. is_beacon
23. libipw_process_probe_response
24. libipw_rx_mgt

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Original code based Host AP (software wireless LAN access point) driver
   4  * for Intersil Prism2/2.5/3 - hostap.o module, common routines
   5  *
   6  * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
   7  * <j@w1.fi>
   8  * Copyright (c) 2002-2003, Jouni Malinen <j@w1.fi>
   9  * Copyright (c) 2004-2005, Intel Corporation
  10  */
  11 
  12 #include <linux/compiler.h>
  13 #include <linux/errno.h>
  14 #include <linux/if_arp.h>
  15 #include <linux/in6.h>
  16 #include <linux/gfp.h>
  17 #include <linux/in.h>
  18 #include <linux/ip.h>
  19 #include <linux/kernel.h>
  20 #include <linux/module.h>
  21 #include <linux/netdevice.h>
  22 #include <linux/proc_fs.h>
  23 #include <linux/skbuff.h>
  24 #include <linux/tcp.h>
  25 #include <linux/types.h>
  26 #include <linux/wireless.h>
  27 #include <linux/etherdevice.h>
  28 #include <linux/uaccess.h>
  29 #include <linux/ctype.h>
  30 
  31 #include <net/lib80211.h>
  32 
  33 #include "libipw.h"
  34 
  35 static void libipw_monitor_rx(struct libipw_device *ieee,
  36                                         struct sk_buff *skb,
  37                                         struct libipw_rx_stats *rx_stats)
  38 {
  39         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
  40         u16 fc = le16_to_cpu(hdr->frame_control);
  41 
  42         skb->dev = ieee->dev;
  43         skb_reset_mac_header(skb);
  44         skb_pull(skb, libipw_get_hdrlen(fc));
  45         skb->pkt_type = PACKET_OTHERHOST;
  46         skb->protocol = htons(ETH_P_80211_RAW);
  47         memset(skb->cb, 0, sizeof(skb->cb));
  48         netif_rx(skb);
  49 }
  50 
  51 /* Called only as a tasklet (software IRQ) */
  52 static struct libipw_frag_entry *libipw_frag_cache_find(struct
  53                                                               libipw_device
  54                                                               *ieee,
  55                                                               unsigned int seq,
  56                                                               unsigned int frag,
  57                                                               u8 * src,
  58                                                               u8 * dst)
  59 {
  60         struct libipw_frag_entry *entry;
  61         int i;
  62 
  63         for (i = 0; i < LIBIPW_FRAG_CACHE_LEN; i++) {
  64                 entry = &ieee->frag_cache[i];
  65                 if (entry->skb != NULL &&
  66                     time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
  67                         LIBIPW_DEBUG_FRAG("expiring fragment cache entry "
  68                                              "seq=%u last_frag=%u\n",
  69                                              entry->seq, entry->last_frag);
  70                         dev_kfree_skb_any(entry->skb);
  71                         entry->skb = NULL;
  72                 }
  73 
  74                 if (entry->skb != NULL && entry->seq == seq &&
  75                     (entry->last_frag + 1 == frag || frag == -1) &&
  76                     ether_addr_equal(entry->src_addr, src) &&
  77                     ether_addr_equal(entry->dst_addr, dst))
  78                         return entry;
  79         }
  80 
  81         return NULL;
  82 }
  83 
  84 /* Called only as a tasklet (software IRQ) */
  85 static struct sk_buff *libipw_frag_cache_get(struct libipw_device *ieee,
  86                                                 struct libipw_hdr_4addr *hdr)
  87 {
  88         struct sk_buff *skb = NULL;
  89         u16 sc;
  90         unsigned int frag, seq;
  91         struct libipw_frag_entry *entry;
  92 
  93         sc = le16_to_cpu(hdr->seq_ctl);
  94         frag = WLAN_GET_SEQ_FRAG(sc);
  95         seq = WLAN_GET_SEQ_SEQ(sc);
  96 
  97         if (frag == 0) {
  98                 /* Reserve enough space to fit maximum frame length */
  99                 skb = dev_alloc_skb(ieee->dev->mtu +
 100                                     sizeof(struct libipw_hdr_4addr) +
 101                                     8 /* LLC */  +
 102                                     2 /* alignment */  +
 103                                     8 /* WEP */  + ETH_ALEN /* WDS */ );
 104                 if (skb == NULL)
 105                         return NULL;
 106 
 107                 entry = &ieee->frag_cache[ieee->frag_next_idx];
 108                 ieee->frag_next_idx++;
 109                 if (ieee->frag_next_idx >= LIBIPW_FRAG_CACHE_LEN)
 110                         ieee->frag_next_idx = 0;
 111 
 112                 if (entry->skb != NULL)
 113                         dev_kfree_skb_any(entry->skb);
 114 
 115                 entry->first_frag_time = jiffies;
 116                 entry->seq = seq;
 117                 entry->last_frag = frag;
 118                 entry->skb = skb;
 119                 memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
 120                 memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
 121         } else {
 122                 /* received a fragment of a frame for which the head fragment
 123                  * should have already been received */
 124                 entry = libipw_frag_cache_find(ieee, seq, frag, hdr->addr2,
 125                                                   hdr->addr1);
 126                 if (entry != NULL) {
 127                         entry->last_frag = frag;
 128                         skb = entry->skb;
 129                 }
 130         }
 131 
 132         return skb;
 133 }
 134 
 135 /* Called only as a tasklet (software IRQ) */
 136 static int libipw_frag_cache_invalidate(struct libipw_device *ieee,
 137                                            struct libipw_hdr_4addr *hdr)
 138 {
 139         u16 sc;
 140         unsigned int seq;
 141         struct libipw_frag_entry *entry;
 142 
 143         sc = le16_to_cpu(hdr->seq_ctl);
 144         seq = WLAN_GET_SEQ_SEQ(sc);
 145 
 146         entry = libipw_frag_cache_find(ieee, seq, -1, hdr->addr2,
 147                                           hdr->addr1);
 148 
 149         if (entry == NULL) {
 150                 LIBIPW_DEBUG_FRAG("could not invalidate fragment cache "
 151                                      "entry (seq=%u)\n", seq);
 152                 return -1;
 153         }
 154 
 155         entry->skb = NULL;
 156         return 0;
 157 }
 158 
 159 #ifdef NOT_YET
 160 /* libipw_rx_frame_mgtmt
 161  *
 162  * Responsible for handling management control frames
 163  *
 164  * Called by libipw_rx */
 165 static int
 166 libipw_rx_frame_mgmt(struct libipw_device *ieee, struct sk_buff *skb,
 167                         struct libipw_rx_stats *rx_stats, u16 type,
 168                         u16 stype)
 169 {
 170         if (ieee->iw_mode == IW_MODE_MASTER) {
 171                 printk(KERN_DEBUG "%s: Master mode not yet supported.\n",
 172                        ieee->dev->name);
 173                 return 0;
 174 /*
 175   hostap_update_sta_ps(ieee, (struct hostap_libipw_hdr_4addr *)
 176   skb->data);*/
 177         }
 178 
 179         if (ieee->hostapd && type == WLAN_FC_TYPE_MGMT) {
 180                 if (stype == WLAN_FC_STYPE_BEACON &&
 181                     ieee->iw_mode == IW_MODE_MASTER) {
 182                         struct sk_buff *skb2;
 183                         /* Process beacon frames also in kernel driver to
 184                          * update STA(AP) table statistics */
 185                         skb2 = skb_clone(skb, GFP_ATOMIC);
 186                         if (skb2)
 187                                 hostap_rx(skb2->dev, skb2, rx_stats);
 188                 }
 189 
 190                 /* send management frames to the user space daemon for
 191                  * processing */
 192                 ieee->apdevstats.rx_packets++;
 193                 ieee->apdevstats.rx_bytes += skb->len;
 194                 prism2_rx_80211(ieee->apdev, skb, rx_stats, PRISM2_RX_MGMT);
 195                 return 0;
 196         }
 197 
 198         if (ieee->iw_mode == IW_MODE_MASTER) {
 199                 if (type != WLAN_FC_TYPE_MGMT && type != WLAN_FC_TYPE_CTRL) {
 200                         printk(KERN_DEBUG "%s: unknown management frame "
 201                                "(type=0x%02x, stype=0x%02x) dropped\n",
 202                                skb->dev->name, type, stype);
 203                         return -1;
 204                 }
 205 
 206                 hostap_rx(skb->dev, skb, rx_stats);
 207                 return 0;
 208         }
 209 
 210         printk(KERN_DEBUG "%s: hostap_rx_frame_mgmt: management frame "
 211                "received in non-Host AP mode\n", skb->dev->name);
 212         return -1;
 213 }
 214 #endif
 215 
 216 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
 217 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
 218 static unsigned char libipw_rfc1042_header[] =
 219     { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
 220 
 221 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
 222 static unsigned char libipw_bridge_tunnel_header[] =
 223     { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
 224 /* No encapsulation header if EtherType < 0x600 (=length) */
 225 
 226 /* Called by libipw_rx_frame_decrypt */
 227 static int libipw_is_eapol_frame(struct libipw_device *ieee,
 228                                     struct sk_buff *skb)
 229 {
 230         struct net_device *dev = ieee->dev;
 231         u16 fc, ethertype;
 232         struct libipw_hdr_3addr *hdr;
 233         u8 *pos;
 234 
 235         if (skb->len < 24)
 236                 return 0;
 237 
 238         hdr = (struct libipw_hdr_3addr *)skb->data;
 239         fc = le16_to_cpu(hdr->frame_ctl);
 240 
 241         /* check that the frame is unicast frame to us */
 242         if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 243             IEEE80211_FCTL_TODS &&
 244             ether_addr_equal(hdr->addr1, dev->dev_addr) &&
 245             ether_addr_equal(hdr->addr3, dev->dev_addr)) {
 246                 /* ToDS frame with own addr BSSID and DA */
 247         } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 248                    IEEE80211_FCTL_FROMDS &&
 249                    ether_addr_equal(hdr->addr1, dev->dev_addr)) {
 250                 /* FromDS frame with own addr as DA */
 251         } else
 252                 return 0;
 253 
 254         if (skb->len < 24 + 8)
 255                 return 0;
 256 
 257         /* check for port access entity Ethernet type */
 258         pos = skb->data + 24;
 259         ethertype = (pos[6] << 8) | pos[7];
 260         if (ethertype == ETH_P_PAE)
 261                 return 1;
 262 
 263         return 0;
 264 }
 265 
 266 /* Called only as a tasklet (software IRQ), by libipw_rx */
 267 static int
 268 libipw_rx_frame_decrypt(struct libipw_device *ieee, struct sk_buff *skb,
 269                            struct lib80211_crypt_data *crypt)
 270 {
 271         struct libipw_hdr_3addr *hdr;
 272         int res, hdrlen;
 273 
 274         if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
 275                 return 0;
 276 
 277         hdr = (struct libipw_hdr_3addr *)skb->data;
 278         hdrlen = libipw_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 279 
 280         atomic_inc(&crypt->refcnt);
 281         res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
 282         atomic_dec(&crypt->refcnt);
 283         if (res < 0) {
 284                 LIBIPW_DEBUG_DROP("decryption failed (SA=%pM) res=%d\n",
 285                                      hdr->addr2, res);
 286                 if (res == -2)
 287                         LIBIPW_DEBUG_DROP("Decryption failed ICV "
 288                                              "mismatch (key %d)\n",
 289                                              skb->data[hdrlen + 3] >> 6);
 290                 ieee->ieee_stats.rx_discards_undecryptable++;
 291                 return -1;
 292         }
 293 
 294         return res;
 295 }
 296 
 297 /* Called only as a tasklet (software IRQ), by libipw_rx */
 298 static int
 299 libipw_rx_frame_decrypt_msdu(struct libipw_device *ieee,
 300                                 struct sk_buff *skb, int keyidx,
 301                                 struct lib80211_crypt_data *crypt)
 302 {
 303         struct libipw_hdr_3addr *hdr;
 304         int res, hdrlen;
 305 
 306         if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
 307                 return 0;
 308 
 309         hdr = (struct libipw_hdr_3addr *)skb->data;
 310         hdrlen = libipw_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 311 
 312         atomic_inc(&crypt->refcnt);
 313         res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
 314         atomic_dec(&crypt->refcnt);
 315         if (res < 0) {
 316                 printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
 317                        " (SA=%pM keyidx=%d)\n", ieee->dev->name, hdr->addr2,
 318                        keyidx);
 319                 return -1;
 320         }
 321 
 322         return 0;
 323 }
 324 
 325 /* All received frames are sent to this function. @skb contains the frame in
 326  * IEEE 802.11 format, i.e., in the format it was sent over air.
 327  * This function is called only as a tasklet (software IRQ). */
 328 int libipw_rx(struct libipw_device *ieee, struct sk_buff *skb,
 329                  struct libipw_rx_stats *rx_stats)
 330 {
 331         struct net_device *dev = ieee->dev;
 332         struct libipw_hdr_4addr *hdr;
 333         size_t hdrlen;
 334         u16 fc, type, stype, sc;
 335         unsigned int frag;
 336         u8 *payload;
 337         u16 ethertype;
 338 #ifdef NOT_YET
 339         struct net_device *wds = NULL;
 340         struct sk_buff *skb2 = NULL;
 341         struct net_device *wds = NULL;
 342         int frame_authorized = 0;
 343         int from_assoc_ap = 0;
 344         void *sta = NULL;
 345 #endif
 346         u8 dst[ETH_ALEN];
 347         u8 src[ETH_ALEN];
 348         struct lib80211_crypt_data *crypt = NULL;
 349         int keyidx = 0;
 350         int can_be_decrypted = 0;
 351 
 352         hdr = (struct libipw_hdr_4addr *)skb->data;
 353         if (skb->len < 10) {
 354                 printk(KERN_INFO "%s: SKB length < 10\n", dev->name);
 355                 goto rx_dropped;
 356         }
 357 
 358         fc = le16_to_cpu(hdr->frame_ctl);
 359         type = WLAN_FC_GET_TYPE(fc);
 360         stype = WLAN_FC_GET_STYPE(fc);
 361         sc = le16_to_cpu(hdr->seq_ctl);
 362         frag = WLAN_GET_SEQ_FRAG(sc);
 363         hdrlen = libipw_get_hdrlen(fc);
 364 
 365         if (skb->len < hdrlen) {
 366                 printk(KERN_INFO "%s: invalid SKB length %d\n",
 367                         dev->name, skb->len);
 368                 goto rx_dropped;
 369         }
 370 
 371         /* Put this code here so that we avoid duplicating it in all
 372          * Rx paths. - Jean II */
 373 #ifdef CONFIG_WIRELESS_EXT
 374 #ifdef IW_WIRELESS_SPY          /* defined in iw_handler.h */
 375         /* If spy monitoring on */
 376         if (ieee->spy_data.spy_number > 0) {
 377                 struct iw_quality wstats;
 378 
 379                 wstats.updated = 0;
 380                 if (rx_stats->mask & LIBIPW_STATMASK_RSSI) {
 381                         wstats.level = rx_stats->signal;
 382                         wstats.updated |= IW_QUAL_LEVEL_UPDATED;
 383                 } else
 384                         wstats.updated |= IW_QUAL_LEVEL_INVALID;
 385 
 386                 if (rx_stats->mask & LIBIPW_STATMASK_NOISE) {
 387                         wstats.noise = rx_stats->noise;
 388                         wstats.updated |= IW_QUAL_NOISE_UPDATED;
 389                 } else
 390                         wstats.updated |= IW_QUAL_NOISE_INVALID;
 391 
 392                 if (rx_stats->mask & LIBIPW_STATMASK_SIGNAL) {
 393                         wstats.qual = rx_stats->signal;
 394                         wstats.updated |= IW_QUAL_QUAL_UPDATED;
 395                 } else
 396                         wstats.updated |= IW_QUAL_QUAL_INVALID;
 397 
 398                 /* Update spy records */
 399                 wireless_spy_update(ieee->dev, hdr->addr2, &wstats);
 400         }
 401 #endif                          /* IW_WIRELESS_SPY */
 402 #endif                          /* CONFIG_WIRELESS_EXT */
 403 
 404 #ifdef NOT_YET
 405         hostap_update_rx_stats(local->ap, hdr, rx_stats);
 406 #endif
 407 
 408         if (ieee->iw_mode == IW_MODE_MONITOR) {
 409                 dev->stats.rx_packets++;
 410                 dev->stats.rx_bytes += skb->len;
 411                 libipw_monitor_rx(ieee, skb, rx_stats);
 412                 return 1;
 413         }
 414 
 415         can_be_decrypted = (is_multicast_ether_addr(hdr->addr1) ||
 416                             is_broadcast_ether_addr(hdr->addr2)) ?
 417             ieee->host_mc_decrypt : ieee->host_decrypt;
 418 
 419         if (can_be_decrypted) {
 420                 if (skb->len >= hdrlen + 3) {
 421                         /* Top two-bits of byte 3 are the key index */
 422                         keyidx = skb->data[hdrlen + 3] >> 6;
 423                 }
 424 
 425                 /* ieee->crypt[] is WEP_KEY (4) in length.  Given that keyidx
 426                  * is only allowed 2-bits of storage, no value of keyidx can
 427                  * be provided via above code that would result in keyidx
 428                  * being out of range */
 429                 crypt = ieee->crypt_info.crypt[keyidx];
 430 
 431 #ifdef NOT_YET
 432                 sta = NULL;
 433 
 434                 /* Use station specific key to override default keys if the
 435                  * receiver address is a unicast address ("individual RA"). If
 436                  * bcrx_sta_key parameter is set, station specific key is used
 437                  * even with broad/multicast targets (this is against IEEE
 438                  * 802.11, but makes it easier to use different keys with
 439                  * stations that do not support WEP key mapping). */
 440 
 441                 if (is_unicast_ether_addr(hdr->addr1) || local->bcrx_sta_key)
 442                         (void)hostap_handle_sta_crypto(local, hdr, &crypt,
 443                                                        &sta);
 444 #endif
 445 
 446                 /* allow NULL decrypt to indicate an station specific override
 447                  * for default encryption */
 448                 if (crypt && (crypt->ops == NULL ||
 449                               crypt->ops->decrypt_mpdu == NULL))
 450                         crypt = NULL;
 451 
 452                 if (!crypt && (fc & IEEE80211_FCTL_PROTECTED)) {
 453                         /* This seems to be triggered by some (multicast?)
 454                          * frames from other than current BSS, so just drop the
 455                          * frames silently instead of filling system log with
 456                          * these reports. */
 457                         LIBIPW_DEBUG_DROP("Decryption failed (not set)"
 458                                              " (SA=%pM)\n", hdr->addr2);
 459                         ieee->ieee_stats.rx_discards_undecryptable++;
 460                         goto rx_dropped;
 461                 }
 462         }
 463 #ifdef NOT_YET
 464         if (type != WLAN_FC_TYPE_DATA) {
 465                 if (type == WLAN_FC_TYPE_MGMT && stype == WLAN_FC_STYPE_AUTH &&
 466                     fc & IEEE80211_FCTL_PROTECTED && ieee->host_decrypt &&
 467                     (keyidx = hostap_rx_frame_decrypt(ieee, skb, crypt)) < 0) {
 468                         printk(KERN_DEBUG "%s: failed to decrypt mgmt::auth "
 469                                "from %pM\n", dev->name, hdr->addr2);
 470                         /* TODO: could inform hostapd about this so that it
 471                          * could send auth failure report */
 472                         goto rx_dropped;
 473                 }
 474 
 475                 if (libipw_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
 476                         goto rx_dropped;
 477                 else
 478                         goto rx_exit;
 479         }
 480 #endif
 481         /* drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.29) */
 482         if (sc == ieee->prev_seq_ctl)
 483                 goto rx_dropped;
 484         else
 485                 ieee->prev_seq_ctl = sc;
 486 
 487         /* Data frame - extract src/dst addresses */
 488         if (skb->len < LIBIPW_3ADDR_LEN)
 489                 goto rx_dropped;
 490 
 491         switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
 492         case IEEE80211_FCTL_FROMDS:
 493                 memcpy(dst, hdr->addr1, ETH_ALEN);
 494                 memcpy(src, hdr->addr3, ETH_ALEN);
 495                 break;
 496         case IEEE80211_FCTL_TODS:
 497                 memcpy(dst, hdr->addr3, ETH_ALEN);
 498                 memcpy(src, hdr->addr2, ETH_ALEN);
 499                 break;
 500         case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
 501                 if (skb->len < LIBIPW_4ADDR_LEN)
 502                         goto rx_dropped;
 503                 memcpy(dst, hdr->addr3, ETH_ALEN);
 504                 memcpy(src, hdr->addr4, ETH_ALEN);
 505                 break;
 506         default:
 507                 memcpy(dst, hdr->addr1, ETH_ALEN);
 508                 memcpy(src, hdr->addr2, ETH_ALEN);
 509                 break;
 510         }
 511 
 512 #ifdef NOT_YET
 513         if (hostap_rx_frame_wds(ieee, hdr, fc, &wds))
 514                 goto rx_dropped;
 515         if (wds) {
 516                 skb->dev = dev = wds;
 517                 stats = hostap_get_stats(dev);
 518         }
 519 
 520         if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
 521             (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 522             IEEE80211_FCTL_FROMDS && ieee->stadev &&
 523             ether_addr_equal(hdr->addr2, ieee->assoc_ap_addr)) {
 524                 /* Frame from BSSID of the AP for which we are a client */
 525                 skb->dev = dev = ieee->stadev;
 526                 stats = hostap_get_stats(dev);
 527                 from_assoc_ap = 1;
 528         }
 529 #endif
 530 
 531 #ifdef NOT_YET
 532         if ((ieee->iw_mode == IW_MODE_MASTER ||
 533              ieee->iw_mode == IW_MODE_REPEAT) && !from_assoc_ap) {
 534                 switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats,
 535                                              wds != NULL)) {
 536                 case AP_RX_CONTINUE_NOT_AUTHORIZED:
 537                         frame_authorized = 0;
 538                         break;
 539                 case AP_RX_CONTINUE:
 540                         frame_authorized = 1;
 541                         break;
 542                 case AP_RX_DROP:
 543                         goto rx_dropped;
 544                 case AP_RX_EXIT:
 545                         goto rx_exit;
 546                 }
 547         }
 548 #endif
 549 
 550         /* Nullfunc frames may have PS-bit set, so they must be passed to
 551          * hostap_handle_sta_rx() before being dropped here. */
 552 
 553         stype &= ~IEEE80211_STYPE_QOS_DATA;
 554 
 555         if (stype != IEEE80211_STYPE_DATA &&
 556             stype != IEEE80211_STYPE_DATA_CFACK &&
 557             stype != IEEE80211_STYPE_DATA_CFPOLL &&
 558             stype != IEEE80211_STYPE_DATA_CFACKPOLL) {
 559                 if (stype != IEEE80211_STYPE_NULLFUNC)
 560                         LIBIPW_DEBUG_DROP("RX: dropped data frame "
 561                                              "with no data (type=0x%02x, "
 562                                              "subtype=0x%02x, len=%d)\n",
 563                                              type, stype, skb->len);
 564                 goto rx_dropped;
 565         }
 566 
 567         /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
 568 
 569         if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
 570             (keyidx = libipw_rx_frame_decrypt(ieee, skb, crypt)) < 0)
 571                 goto rx_dropped;
 572 
 573         hdr = (struct libipw_hdr_4addr *)skb->data;
 574 
 575         /* skb: hdr + (possibly fragmented) plaintext payload */
 576         // PR: FIXME: hostap has additional conditions in the "if" below:
 577         // ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
 578         if ((frag != 0) || (fc & IEEE80211_FCTL_MOREFRAGS)) {
 579                 int flen;
 580                 struct sk_buff *frag_skb = libipw_frag_cache_get(ieee, hdr);
 581                 LIBIPW_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
 582 
 583                 if (!frag_skb) {
 584                         LIBIPW_DEBUG(LIBIPW_DL_RX | LIBIPW_DL_FRAG,
 585                                         "Rx cannot get skb from fragment "
 586                                         "cache (morefrag=%d seq=%u frag=%u)\n",
 587                                         (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
 588                                         WLAN_GET_SEQ_SEQ(sc), frag);
 589                         goto rx_dropped;
 590                 }
 591 
 592                 flen = skb->len;
 593                 if (frag != 0)
 594                         flen -= hdrlen;
 595 
 596                 if (frag_skb->tail + flen > frag_skb->end) {
 597                         printk(KERN_WARNING "%s: host decrypted and "
 598                                "reassembled frame did not fit skb\n",
 599                                dev->name);
 600                         libipw_frag_cache_invalidate(ieee, hdr);
 601                         goto rx_dropped;
 602                 }
 603 
 604                 if (frag == 0) {
 605                         /* copy first fragment (including full headers) into
 606                          * beginning of the fragment cache skb */
 607                         skb_copy_from_linear_data(skb, skb_put(frag_skb, flen), flen);
 608                 } else {
 609                         /* append frame payload to the end of the fragment
 610                          * cache skb */
 611                         skb_copy_from_linear_data_offset(skb, hdrlen,
 612                                       skb_put(frag_skb, flen), flen);
 613                 }
 614                 dev_kfree_skb_any(skb);
 615                 skb = NULL;
 616 
 617                 if (fc & IEEE80211_FCTL_MOREFRAGS) {
 618                         /* more fragments expected - leave the skb in fragment
 619                          * cache for now; it will be delivered to upper layers
 620                          * after all fragments have been received */
 621                         goto rx_exit;
 622                 }
 623 
 624                 /* this was the last fragment and the frame will be
 625                  * delivered, so remove skb from fragment cache */
 626                 skb = frag_skb;
 627                 hdr = (struct libipw_hdr_4addr *)skb->data;
 628                 libipw_frag_cache_invalidate(ieee, hdr);
 629         }
 630 
 631         /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
 632          * encrypted/authenticated */
 633         if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
 634             libipw_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
 635                 goto rx_dropped;
 636 
 637         hdr = (struct libipw_hdr_4addr *)skb->data;
 638         if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep) {
 639                 if (            /*ieee->ieee802_1x && */
 640                            libipw_is_eapol_frame(ieee, skb)) {
 641                         /* pass unencrypted EAPOL frames even if encryption is
 642                          * configured */
 643                 } else {
 644                         LIBIPW_DEBUG_DROP("encryption configured, but RX "
 645                                              "frame not encrypted (SA=%pM)\n",
 646                                              hdr->addr2);
 647                         goto rx_dropped;
 648                 }
 649         }
 650 
 651         if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep &&
 652             !libipw_is_eapol_frame(ieee, skb)) {
 653                 LIBIPW_DEBUG_DROP("dropped unencrypted RX data "
 654                                      "frame from %pM (drop_unencrypted=1)\n",
 655                                      hdr->addr2);
 656                 goto rx_dropped;
 657         }
 658 
 659         /* If the frame was decrypted in hardware, we may need to strip off
 660          * any security data (IV, ICV, etc) that was left behind */
 661         if (!can_be_decrypted && (fc & IEEE80211_FCTL_PROTECTED) &&
 662             ieee->host_strip_iv_icv) {
 663                 int trimlen = 0;
 664 
 665                 /* Top two-bits of byte 3 are the key index */
 666                 if (skb->len >= hdrlen + 3)
 667                         keyidx = skb->data[hdrlen + 3] >> 6;
 668 
 669                 /* To strip off any security data which appears before the
 670                  * payload, we simply increase hdrlen (as the header gets
 671                  * chopped off immediately below). For the security data which
 672                  * appears after the payload, we use skb_trim. */
 673 
 674                 switch (ieee->sec.encode_alg[keyidx]) {
 675                 case SEC_ALG_WEP:
 676                         /* 4 byte IV */
 677                         hdrlen += 4;
 678                         /* 4 byte ICV */
 679                         trimlen = 4;
 680                         break;
 681                 case SEC_ALG_TKIP:
 682                         /* 4 byte IV, 4 byte ExtIV */
 683                         hdrlen += 8;
 684                         /* 8 byte MIC, 4 byte ICV */
 685                         trimlen = 12;
 686                         break;
 687                 case SEC_ALG_CCMP:
 688                         /* 8 byte CCMP header */
 689                         hdrlen += 8;
 690                         /* 8 byte MIC */
 691                         trimlen = 8;
 692                         break;
 693                 }
 694 
 695                 if (skb->len < trimlen)
 696                         goto rx_dropped;
 697 
 698                 __skb_trim(skb, skb->len - trimlen);
 699 
 700                 if (skb->len < hdrlen)
 701                         goto rx_dropped;
 702         }
 703 
 704         /* skb: hdr + (possible reassembled) full plaintext payload */
 705 
 706         payload = skb->data + hdrlen;
 707         ethertype = (payload[6] << 8) | payload[7];
 708 
 709 #ifdef NOT_YET
 710         /* If IEEE 802.1X is used, check whether the port is authorized to send
 711          * the received frame. */
 712         if (ieee->ieee802_1x && ieee->iw_mode == IW_MODE_MASTER) {
 713                 if (ethertype == ETH_P_PAE) {
 714                         printk(KERN_DEBUG "%s: RX: IEEE 802.1X frame\n",
 715                                dev->name);
 716                         if (ieee->hostapd && ieee->apdev) {
 717                                 /* Send IEEE 802.1X frames to the user
 718                                  * space daemon for processing */
 719                                 prism2_rx_80211(ieee->apdev, skb, rx_stats,
 720                                                 PRISM2_RX_MGMT);
 721                                 ieee->apdevstats.rx_packets++;
 722                                 ieee->apdevstats.rx_bytes += skb->len;
 723                                 goto rx_exit;
 724                         }
 725                 } else if (!frame_authorized) {
 726                         printk(KERN_DEBUG "%s: dropped frame from "
 727                                "unauthorized port (IEEE 802.1X): "
 728                                "ethertype=0x%04x\n", dev->name, ethertype);
 729                         goto rx_dropped;
 730                 }
 731         }
 732 #endif
 733 
 734         /* convert hdr + possible LLC headers into Ethernet header */
 735         if (skb->len - hdrlen >= 8 &&
 736             ((memcmp(payload, libipw_rfc1042_header, SNAP_SIZE) == 0 &&
 737               ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
 738              memcmp(payload, libipw_bridge_tunnel_header, SNAP_SIZE) == 0)) {
 739                 /* remove RFC1042 or Bridge-Tunnel encapsulation and
 740                  * replace EtherType */
 741                 skb_pull(skb, hdrlen + SNAP_SIZE);
 742                 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
 743                 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
 744         } else {
 745                 __be16 len;
 746                 /* Leave Ethernet header part of hdr and full payload */
 747                 skb_pull(skb, hdrlen);
 748                 len = htons(skb->len);
 749                 memcpy(skb_push(skb, 2), &len, 2);
 750                 memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
 751                 memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
 752         }
 753 
 754 #ifdef NOT_YET
 755         if (wds && ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 756                     IEEE80211_FCTL_TODS) && skb->len >= ETH_HLEN + ETH_ALEN) {
 757                 /* Non-standard frame: get addr4 from its bogus location after
 758                  * the payload */
 759                 skb_copy_to_linear_data_offset(skb, ETH_ALEN,
 760                                                skb->data + skb->len - ETH_ALEN,
 761                                                ETH_ALEN);
 762                 skb_trim(skb, skb->len - ETH_ALEN);
 763         }
 764 #endif
 765 
 766         dev->stats.rx_packets++;
 767         dev->stats.rx_bytes += skb->len;
 768 
 769 #ifdef NOT_YET
 770         if (ieee->iw_mode == IW_MODE_MASTER && !wds && ieee->ap->bridge_packets) {
 771                 if (is_multicast_ether_addr(dst)) {
 772                         /* copy multicast frame both to the higher layers and
 773                          * to the wireless media */
 774                         ieee->ap->bridged_multicast++;
 775                         skb2 = skb_clone(skb, GFP_ATOMIC);
 776                         if (skb2 == NULL)
 777                                 printk(KERN_DEBUG "%s: skb_clone failed for "
 778                                        "multicast frame\n", dev->name);
 779                 } else if (hostap_is_sta_assoc(ieee->ap, dst)) {
 780                         /* send frame directly to the associated STA using
 781                          * wireless media and not passing to higher layers */
 782                         ieee->ap->bridged_unicast++;
 783                         skb2 = skb;
 784                         skb = NULL;
 785                 }
 786         }
 787 
 788         if (skb2 != NULL) {
 789                 /* send to wireless media */
 790                 skb2->dev = dev;
 791                 skb2->protocol = htons(ETH_P_802_3);
 792                 skb_reset_mac_header(skb2);
 793                 skb_reset_network_header(skb2);
 794                 /* skb2->network_header += ETH_HLEN; */
 795                 dev_queue_xmit(skb2);
 796         }
 797 #endif
 798 
 799         if (skb) {
 800                 skb->protocol = eth_type_trans(skb, dev);
 801                 memset(skb->cb, 0, sizeof(skb->cb));
 802                 skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
 803                 if (netif_rx(skb) == NET_RX_DROP) {
 804                         /* netif_rx always succeeds, but it might drop
 805                          * the packet.  If it drops the packet, we log that
 806                          * in our stats. */
 807                         LIBIPW_DEBUG_DROP
 808                             ("RX: netif_rx dropped the packet\n");
 809                         dev->stats.rx_dropped++;
 810                 }
 811         }
 812 
 813       rx_exit:
 814 #ifdef NOT_YET
 815         if (sta)
 816                 hostap_handle_sta_release(sta);
 817 #endif
 818         return 1;
 819 
 820       rx_dropped:
 821         dev->stats.rx_dropped++;
 822 
 823         /* Returning 0 indicates to caller that we have not handled the SKB--
 824          * so it is still allocated and can be used again by underlying
 825          * hardware as a DMA target */
 826         return 0;
 827 }
 828 
 829 /* Filter out unrelated packets, call libipw_rx[_mgt]
 830  * This function takes over the skb, it should not be used again after calling
 831  * this function. */
 832 void libipw_rx_any(struct libipw_device *ieee,
 833                      struct sk_buff *skb, struct libipw_rx_stats *stats)
 834 {
 835         struct libipw_hdr_4addr *hdr;
 836         int is_packet_for_us;
 837         u16 fc;
 838 
 839         if (ieee->iw_mode == IW_MODE_MONITOR) {
 840                 if (!libipw_rx(ieee, skb, stats))
 841                         dev_kfree_skb_irq(skb);
 842                 return;
 843         }
 844 
 845         if (skb->len < sizeof(struct ieee80211_hdr))
 846                 goto drop_free;
 847 
 848         hdr = (struct libipw_hdr_4addr *)skb->data;
 849         fc = le16_to_cpu(hdr->frame_ctl);
 850 
 851         if ((fc & IEEE80211_FCTL_VERS) != 0)
 852                 goto drop_free;
 853 
 854         switch (fc & IEEE80211_FCTL_FTYPE) {
 855         case IEEE80211_FTYPE_MGMT:
 856                 if (skb->len < sizeof(struct libipw_hdr_3addr))
 857                         goto drop_free;
 858                 libipw_rx_mgt(ieee, hdr, stats);
 859                 dev_kfree_skb_irq(skb);
 860                 return;
 861         case IEEE80211_FTYPE_DATA:
 862                 break;
 863         case IEEE80211_FTYPE_CTL:
 864                 return;
 865         default:
 866                 return;
 867         }
 868 
 869         is_packet_for_us = 0;
 870         switch (ieee->iw_mode) {
 871         case IW_MODE_ADHOC:
 872                 /* our BSS and not from/to DS */
 873                 if (ether_addr_equal(hdr->addr3, ieee->bssid))
 874                 if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == 0) {
 875                         /* promisc: get all */
 876                         if (ieee->dev->flags & IFF_PROMISC)
 877                                 is_packet_for_us = 1;
 878                         /* to us */
 879                         else if (ether_addr_equal(hdr->addr1, ieee->dev->dev_addr))
 880                                 is_packet_for_us = 1;
 881                         /* mcast */
 882                         else if (is_multicast_ether_addr(hdr->addr1))
 883                                 is_packet_for_us = 1;
 884                 }
 885                 break;
 886         case IW_MODE_INFRA:
 887                 /* our BSS (== from our AP) and from DS */
 888                 if (ether_addr_equal(hdr->addr2, ieee->bssid))
 889                 if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS) {
 890                         /* promisc: get all */
 891                         if (ieee->dev->flags & IFF_PROMISC)
 892                                 is_packet_for_us = 1;
 893                         /* to us */
 894                         else if (ether_addr_equal(hdr->addr1, ieee->dev->dev_addr))
 895                                 is_packet_for_us = 1;
 896                         /* mcast */
 897                         else if (is_multicast_ether_addr(hdr->addr1)) {
 898                                 /* not our own packet bcasted from AP */
 899                                 if (!ether_addr_equal(hdr->addr3, ieee->dev->dev_addr))
 900                                         is_packet_for_us = 1;
 901                         }
 902                 }
 903                 break;
 904         default:
 905                 /* ? */
 906                 break;
 907         }
 908 
 909         if (is_packet_for_us)
 910                 if (!libipw_rx(ieee, skb, stats))
 911                         dev_kfree_skb_irq(skb);
 912         return;
 913 
 914 drop_free:
 915         dev_kfree_skb_irq(skb);
 916         ieee->dev->stats.rx_dropped++;
 917 }
 918 
 919 #define MGMT_FRAME_FIXED_PART_LENGTH            0x24
 920 
 921 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
 922 
 923 /*
 924 * Make the structure we read from the beacon packet to have
 925 * the right values
 926 */
 927 static int libipw_verify_qos_info(struct libipw_qos_information_element
 928                                      *info_element, int sub_type)
 929 {
 930 
 931         if (info_element->qui_subtype != sub_type)
 932                 return -1;
 933         if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
 934                 return -1;
 935         if (info_element->qui_type != QOS_OUI_TYPE)
 936                 return -1;
 937         if (info_element->version != QOS_VERSION_1)
 938                 return -1;
 939 
 940         return 0;
 941 }
 942 
 943 /*
 944  * Parse a QoS parameter element
 945  */
 946 static int libipw_read_qos_param_element(struct libipw_qos_parameter_info
 947                                             *element_param, struct libipw_info_element
 948                                             *info_element)
 949 {
 950         int ret = 0;
 951         u16 size = sizeof(struct libipw_qos_parameter_info) - 2;
 952 
 953         if ((info_element == NULL) || (element_param == NULL))
 954                 return -1;
 955 
 956         if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
 957                 memcpy(element_param->info_element.qui, info_element->data,
 958                        info_element->len);
 959                 element_param->info_element.elementID = info_element->id;
 960                 element_param->info_element.length = info_element->len;
 961         } else
 962                 ret = -1;
 963         if (ret == 0)
 964                 ret = libipw_verify_qos_info(&element_param->info_element,
 965                                                 QOS_OUI_PARAM_SUB_TYPE);
 966         return ret;
 967 }
 968 
 969 /*
 970  * Parse a QoS information element
 971  */
 972 static int libipw_read_qos_info_element(struct
 973                                            libipw_qos_information_element
 974                                            *element_info, struct libipw_info_element
 975                                            *info_element)
 976 {
 977         int ret = 0;
 978         u16 size = sizeof(struct libipw_qos_information_element) - 2;
 979 
 980         if (element_info == NULL)
 981                 return -1;
 982         if (info_element == NULL)
 983                 return -1;
 984 
 985         if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
 986                 memcpy(element_info->qui, info_element->data,
 987                        info_element->len);
 988                 element_info->elementID = info_element->id;
 989                 element_info->length = info_element->len;
 990         } else
 991                 ret = -1;
 992 
 993         if (ret == 0)
 994                 ret = libipw_verify_qos_info(element_info,
 995                                                 QOS_OUI_INFO_SUB_TYPE);
 996         return ret;
 997 }
 998 
 999 /*
1000  * Write QoS parameters from the ac parameters.
1001  */
1002 static int libipw_qos_convert_ac_to_parameters(struct
1003                                                   libipw_qos_parameter_info
1004                                                   *param_elm, struct
1005                                                   libipw_qos_parameters
1006                                                   *qos_param)
1007 {
1008         int rc = 0;
1009         int i;
1010         struct libipw_qos_ac_parameter *ac_params;
1011         u32 txop;
1012         u8 cw_min;
1013         u8 cw_max;
1014 
1015         for (i = 0; i < QOS_QUEUE_NUM; i++) {
1016                 ac_params = &(param_elm->ac_params_record[i]);
1017 
1018                 qos_param->aifs[i] = (ac_params->aci_aifsn) & 0x0F;
1019                 qos_param->aifs[i] -= (qos_param->aifs[i] < 2) ? 0 : 2;
1020 
1021                 cw_min = ac_params->ecw_min_max & 0x0F;
1022                 qos_param->cw_min[i] = cpu_to_le16((1 << cw_min) - 1);
1023 
1024                 cw_max = (ac_params->ecw_min_max & 0xF0) >> 4;
1025                 qos_param->cw_max[i] = cpu_to_le16((1 << cw_max) - 1);
1026 
1027                 qos_param->flag[i] =
1028                     (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1029 
1030                 txop = le16_to_cpu(ac_params->tx_op_limit) * 32;
1031                 qos_param->tx_op_limit[i] = cpu_to_le16(txop);
1032         }
1033         return rc;
1034 }
1035 
1036 /*
1037  * we have a generic data element which it may contain QoS information or
1038  * parameters element. check the information element length to decide
1039  * which type to read
1040  */
1041 static int libipw_parse_qos_info_param_IE(struct libipw_info_element
1042                                              *info_element,
1043                                              struct libipw_network *network)
1044 {
1045         int rc = 0;
1046         struct libipw_qos_parameters *qos_param = NULL;
1047         struct libipw_qos_information_element qos_info_element;
1048 
1049         rc = libipw_read_qos_info_element(&qos_info_element, info_element);
1050 
1051         if (rc == 0) {
1052                 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1053                 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1054         } else {
1055                 struct libipw_qos_parameter_info param_element;
1056 
1057                 rc = libipw_read_qos_param_element(&param_element,
1058                                                       info_element);
1059                 if (rc == 0) {
1060                         qos_param = &(network->qos_data.parameters);
1061                         libipw_qos_convert_ac_to_parameters(&param_element,
1062                                                                qos_param);
1063                         network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1064                         network->qos_data.param_count =
1065                             param_element.info_element.ac_info & 0x0F;
1066                 }
1067         }
1068 
1069         if (rc == 0) {
1070                 LIBIPW_DEBUG_QOS("QoS is supported\n");
1071                 network->qos_data.supported = 1;
1072         }
1073         return rc;
1074 }
1075 
1076 #ifdef CONFIG_LIBIPW_DEBUG
1077 #define MFIE_STRING(x) case WLAN_EID_ ##x: return #x
1078 
1079 static const char *get_info_element_string(u16 id)
1080 {
1081         switch (id) {
1082                 MFIE_STRING(SSID);
1083                 MFIE_STRING(SUPP_RATES);
1084                 MFIE_STRING(FH_PARAMS);
1085                 MFIE_STRING(DS_PARAMS);
1086                 MFIE_STRING(CF_PARAMS);
1087                 MFIE_STRING(TIM);
1088                 MFIE_STRING(IBSS_PARAMS);
1089                 MFIE_STRING(COUNTRY);
1090                 MFIE_STRING(REQUEST);
1091                 MFIE_STRING(CHALLENGE);
1092                 MFIE_STRING(PWR_CONSTRAINT);
1093                 MFIE_STRING(PWR_CAPABILITY);
1094                 MFIE_STRING(TPC_REQUEST);
1095                 MFIE_STRING(TPC_REPORT);
1096                 MFIE_STRING(SUPPORTED_CHANNELS);
1097                 MFIE_STRING(CHANNEL_SWITCH);
1098                 MFIE_STRING(MEASURE_REQUEST);
1099                 MFIE_STRING(MEASURE_REPORT);
1100                 MFIE_STRING(QUIET);
1101                 MFIE_STRING(IBSS_DFS);
1102                 MFIE_STRING(ERP_INFO);
1103                 MFIE_STRING(RSN);
1104                 MFIE_STRING(EXT_SUPP_RATES);
1105                 MFIE_STRING(VENDOR_SPECIFIC);
1106                 MFIE_STRING(QOS_PARAMETER);
1107         default:
1108                 return "UNKNOWN";
1109         }
1110 }
1111 #endif
1112 
1113 static int libipw_parse_info_param(struct libipw_info_element
1114                                       *info_element, u16 length,
1115                                       struct libipw_network *network)
1116 {
1117         u8 i;
1118 #ifdef CONFIG_LIBIPW_DEBUG
1119         char rates_str[64];
1120         char *p;
1121 #endif
1122 
1123         while (length >= sizeof(*info_element)) {
1124                 if (sizeof(*info_element) + info_element->len > length) {
1125                         LIBIPW_DEBUG_MGMT("Info elem: parse failed: "
1126                                              "info_element->len + 2 > left : "
1127                                              "info_element->len+2=%zd left=%d, id=%d.\n",
1128                                              info_element->len +
1129                                              sizeof(*info_element),
1130                                              length, info_element->id);
1131                         /* We stop processing but don't return an error here
1132                          * because some misbehaviour APs break this rule. ie.
1133                          * Orinoco AP1000. */
1134                         break;
1135                 }
1136 
1137                 switch (info_element->id) {
1138                 case WLAN_EID_SSID:
1139                         network->ssid_len = min(info_element->len,
1140                                                 (u8) IW_ESSID_MAX_SIZE);
1141                         memcpy(network->ssid, info_element->data,
1142                                network->ssid_len);
1143                         if (network->ssid_len < IW_ESSID_MAX_SIZE)
1144                                 memset(network->ssid + network->ssid_len, 0,
1145                                        IW_ESSID_MAX_SIZE - network->ssid_len);
1146 
1147                         LIBIPW_DEBUG_MGMT("WLAN_EID_SSID: '%*pE' len=%d.\n",
1148                                           network->ssid_len, network->ssid,
1149                                           network->ssid_len);
1150                         break;
1151 
1152                 case WLAN_EID_SUPP_RATES:
1153 #ifdef CONFIG_LIBIPW_DEBUG
1154                         p = rates_str;
1155 #endif
1156                         network->rates_len = min(info_element->len,
1157                                                  MAX_RATES_LENGTH);
1158                         for (i = 0; i < network->rates_len; i++) {
1159                                 network->rates[i] = info_element->data[i];
1160 #ifdef CONFIG_LIBIPW_DEBUG
1161                                 p += snprintf(p, sizeof(rates_str) -
1162                                               (p - rates_str), "%02X ",
1163                                               network->rates[i]);
1164 #endif
1165                                 if (libipw_is_ofdm_rate
1166                                     (info_element->data[i])) {
1167                                         network->flags |= NETWORK_HAS_OFDM;
1168                                         if (info_element->data[i] &
1169                                             LIBIPW_BASIC_RATE_MASK)
1170                                                 network->flags &=
1171                                                     ~NETWORK_HAS_CCK;
1172                                 }
1173                         }
1174 
1175                         LIBIPW_DEBUG_MGMT("WLAN_EID_SUPP_RATES: '%s' (%d)\n",
1176                                              rates_str, network->rates_len);
1177                         break;
1178 
1179                 case WLAN_EID_EXT_SUPP_RATES:
1180 #ifdef CONFIG_LIBIPW_DEBUG
1181                         p = rates_str;
1182 #endif
1183                         network->rates_ex_len = min(info_element->len,
1184                                                     MAX_RATES_EX_LENGTH);
1185                         for (i = 0; i < network->rates_ex_len; i++) {
1186                                 network->rates_ex[i] = info_element->data[i];
1187 #ifdef CONFIG_LIBIPW_DEBUG
1188                                 p += snprintf(p, sizeof(rates_str) -
1189                                               (p - rates_str), "%02X ",
1190                                               network->rates_ex[i]);
1191 #endif
1192                                 if (libipw_is_ofdm_rate
1193                                     (info_element->data[i])) {
1194                                         network->flags |= NETWORK_HAS_OFDM;
1195                                         if (info_element->data[i] &
1196                                             LIBIPW_BASIC_RATE_MASK)
1197                                                 network->flags &=
1198                                                     ~NETWORK_HAS_CCK;
1199                                 }
1200                         }
1201 
1202                         LIBIPW_DEBUG_MGMT("WLAN_EID_EXT_SUPP_RATES: '%s' (%d)\n",
1203                                              rates_str, network->rates_ex_len);
1204                         break;
1205 
1206                 case WLAN_EID_DS_PARAMS:
1207                         LIBIPW_DEBUG_MGMT("WLAN_EID_DS_PARAMS: %d\n",
1208                                              info_element->data[0]);
1209                         network->channel = info_element->data[0];
1210                         break;
1211 
1212                 case WLAN_EID_FH_PARAMS:
1213                         LIBIPW_DEBUG_MGMT("WLAN_EID_FH_PARAMS: ignored\n");
1214                         break;
1215 
1216                 case WLAN_EID_CF_PARAMS:
1217                         LIBIPW_DEBUG_MGMT("WLAN_EID_CF_PARAMS: ignored\n");
1218                         break;
1219 
1220                 case WLAN_EID_TIM:
1221                         network->tim.tim_count = info_element->data[0];
1222                         network->tim.tim_period = info_element->data[1];
1223                         LIBIPW_DEBUG_MGMT("WLAN_EID_TIM: partially ignored\n");
1224                         break;
1225 
1226                 case WLAN_EID_ERP_INFO:
1227                         network->erp_value = info_element->data[0];
1228                         network->flags |= NETWORK_HAS_ERP_VALUE;
1229                         LIBIPW_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1230                                              network->erp_value);
1231                         break;
1232 
1233                 case WLAN_EID_IBSS_PARAMS:
1234                         network->atim_window = info_element->data[0];
1235                         LIBIPW_DEBUG_MGMT("WLAN_EID_IBSS_PARAMS: %d\n",
1236                                              network->atim_window);
1237                         break;
1238 
1239                 case WLAN_EID_CHALLENGE:
1240                         LIBIPW_DEBUG_MGMT("WLAN_EID_CHALLENGE: ignored\n");
1241                         break;
1242 
1243                 case WLAN_EID_VENDOR_SPECIFIC:
1244                         LIBIPW_DEBUG_MGMT("WLAN_EID_VENDOR_SPECIFIC: %d bytes\n",
1245                                              info_element->len);
1246                         if (!libipw_parse_qos_info_param_IE(info_element,
1247                                                                network))
1248                                 break;
1249 
1250                         if (info_element->len >= 4 &&
1251                             info_element->data[0] == 0x00 &&
1252                             info_element->data[1] == 0x50 &&
1253                             info_element->data[2] == 0xf2 &&
1254                             info_element->data[3] == 0x01) {
1255                                 network->wpa_ie_len = min(info_element->len + 2,
1256                                                           MAX_WPA_IE_LEN);
1257                                 memcpy(network->wpa_ie, info_element,
1258                                        network->wpa_ie_len);
1259                         }
1260                         break;
1261 
1262                 case WLAN_EID_RSN:
1263                         LIBIPW_DEBUG_MGMT("WLAN_EID_RSN: %d bytes\n",
1264                                              info_element->len);
1265                         network->rsn_ie_len = min(info_element->len + 2,
1266                                                   MAX_WPA_IE_LEN);
1267                         memcpy(network->rsn_ie, info_element,
1268                                network->rsn_ie_len);
1269                         break;
1270 
1271                 case WLAN_EID_QOS_PARAMETER:
1272                         printk(KERN_ERR
1273                                "QoS Error need to parse QOS_PARAMETER IE\n");
1274                         break;
1275                         /* 802.11h */
1276                 case WLAN_EID_PWR_CONSTRAINT:
1277                         network->power_constraint = info_element->data[0];
1278                         network->flags |= NETWORK_HAS_POWER_CONSTRAINT;
1279                         break;
1280 
1281                 case WLAN_EID_CHANNEL_SWITCH:
1282                         network->power_constraint = info_element->data[0];
1283                         network->flags |= NETWORK_HAS_CSA;
1284                         break;
1285 
1286                 case WLAN_EID_QUIET:
1287                         network->quiet.count = info_element->data[0];
1288                         network->quiet.period = info_element->data[1];
1289                         network->quiet.duration = info_element->data[2];
1290                         network->quiet.offset = info_element->data[3];
1291                         network->flags |= NETWORK_HAS_QUIET;
1292                         break;
1293 
1294                 case WLAN_EID_IBSS_DFS:
1295                         network->flags |= NETWORK_HAS_IBSS_DFS;
1296                         break;
1297 
1298                 case WLAN_EID_TPC_REPORT:
1299                         network->tpc_report.transmit_power =
1300                             info_element->data[0];
1301                         network->tpc_report.link_margin = info_element->data[1];
1302                         network->flags |= NETWORK_HAS_TPC_REPORT;
1303                         break;
1304 
1305                 default:
1306                         LIBIPW_DEBUG_MGMT
1307                             ("Unsupported info element: %s (%d)\n",
1308                              get_info_element_string(info_element->id),
1309                              info_element->id);
1310                         break;
1311                 }
1312 
1313                 length -= sizeof(*info_element) + info_element->len;
1314                 info_element =
1315                     (struct libipw_info_element *)&info_element->
1316                     data[info_element->len];
1317         }
1318 
1319         return 0;
1320 }
1321 
1322 static int libipw_handle_assoc_resp(struct libipw_device *ieee, struct libipw_assoc_response
1323                                        *frame, struct libipw_rx_stats *stats)
1324 {
1325         struct libipw_network network_resp = { };
1326         struct libipw_network *network = &network_resp;
1327         struct net_device *dev = ieee->dev;
1328 
1329         network->flags = 0;
1330         network->qos_data.active = 0;
1331         network->qos_data.supported = 0;
1332         network->qos_data.param_count = 0;
1333         network->qos_data.old_param_count = 0;
1334 
1335         //network->atim_window = le16_to_cpu(frame->aid) & (0x3FFF);
1336         network->atim_window = le16_to_cpu(frame->aid);
1337         network->listen_interval = le16_to_cpu(frame->status);
1338         memcpy(network->bssid, frame->header.addr3, ETH_ALEN);
1339         network->capability = le16_to_cpu(frame->capability);
1340         network->last_scanned = jiffies;
1341         network->rates_len = network->rates_ex_len = 0;
1342         network->last_associate = 0;
1343         network->ssid_len = 0;
1344         network->erp_value =
1345             (network->capability & WLAN_CAPABILITY_IBSS) ? 0x3 : 0x0;
1346 
1347         if (stats->freq == LIBIPW_52GHZ_BAND) {
1348                 /* for A band (No DS info) */
1349                 network->channel = stats->received_channel;
1350         } else
1351                 network->flags |= NETWORK_HAS_CCK;
1352 
1353         network->wpa_ie_len = 0;
1354         network->rsn_ie_len = 0;
1355 
1356         if (libipw_parse_info_param
1357             (frame->info_element, stats->len - sizeof(*frame), network))
1358                 return 1;
1359 
1360         network->mode = 0;
1361         if (stats->freq == LIBIPW_52GHZ_BAND)
1362                 network->mode = IEEE_A;
1363         else {
1364                 if (network->flags & NETWORK_HAS_OFDM)
1365                         network->mode |= IEEE_G;
1366                 if (network->flags & NETWORK_HAS_CCK)
1367                         network->mode |= IEEE_B;
1368         }
1369 
1370         memcpy(&network->stats, stats, sizeof(network->stats));
1371 
1372         if (ieee->handle_assoc_response != NULL)
1373                 ieee->handle_assoc_response(dev, frame, network);
1374 
1375         return 0;
1376 }
1377 
1378 /***************************************************/
1379 
1380 static int libipw_network_init(struct libipw_device *ieee, struct libipw_probe_response
1381                                          *beacon,
1382                                          struct libipw_network *network,
1383                                          struct libipw_rx_stats *stats)
1384 {
1385         network->qos_data.active = 0;
1386         network->qos_data.supported = 0;
1387         network->qos_data.param_count = 0;
1388         network->qos_data.old_param_count = 0;
1389 
1390         /* Pull out fixed field data */
1391         memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
1392         network->capability = le16_to_cpu(beacon->capability);
1393         network->last_scanned = jiffies;
1394         network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
1395         network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
1396         network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
1397         /* Where to pull this? beacon->listen_interval; */
1398         network->listen_interval = 0x0A;
1399         network->rates_len = network->rates_ex_len = 0;
1400         network->last_associate = 0;
1401         network->ssid_len = 0;
1402         network->flags = 0;
1403         network->atim_window = 0;
1404         network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
1405             0x3 : 0x0;
1406 
1407         if (stats->freq == LIBIPW_52GHZ_BAND) {
1408                 /* for A band (No DS info) */
1409                 network->channel = stats->received_channel;
1410         } else
1411                 network->flags |= NETWORK_HAS_CCK;
1412 
1413         network->wpa_ie_len = 0;
1414         network->rsn_ie_len = 0;
1415 
1416         if (libipw_parse_info_param
1417             (beacon->info_element, stats->len - sizeof(*beacon), network))
1418                 return 1;
1419 
1420         network->mode = 0;
1421         if (stats->freq == LIBIPW_52GHZ_BAND)
1422                 network->mode = IEEE_A;
1423         else {
1424                 if (network->flags & NETWORK_HAS_OFDM)
1425                         network->mode |= IEEE_G;
1426                 if (network->flags & NETWORK_HAS_CCK)
1427                         network->mode |= IEEE_B;
1428         }
1429 
1430         if (network->mode == 0) {
1431                 LIBIPW_DEBUG_SCAN("Filtered out '%*pE (%pM)' network.\n",
1432                                   network->ssid_len, network->ssid,
1433                                   network->bssid);
1434                 return 1;
1435         }
1436 
1437         memcpy(&network->stats, stats, sizeof(network->stats));
1438 
1439         return 0;
1440 }
1441 
1442 static inline int is_same_network(struct libipw_network *src,
1443                                   struct libipw_network *dst)
1444 {
1445         /* A network is only a duplicate if the channel, BSSID, and ESSID
1446          * all match.  We treat all <hidden> with the same BSSID and channel
1447          * as one network */
1448         return ((src->ssid_len == dst->ssid_len) &&
1449                 (src->channel == dst->channel) &&
1450                 ether_addr_equal_64bits(src->bssid, dst->bssid) &&
1451                 !memcmp(src->ssid, dst->ssid, src->ssid_len));
1452 }
1453 
1454 static void update_network(struct libipw_network *dst,
1455                                   struct libipw_network *src)
1456 {
1457         int qos_active;
1458         u8 old_param;
1459 
1460         /* We only update the statistics if they were created by receiving
1461          * the network information on the actual channel the network is on.
1462          *
1463          * This keeps beacons received on neighbor channels from bringing
1464          * down the signal level of an AP. */
1465         if (dst->channel == src->stats.received_channel)
1466                 memcpy(&dst->stats, &src->stats,
1467                        sizeof(struct libipw_rx_stats));
1468         else
1469                 LIBIPW_DEBUG_SCAN("Network %pM info received "
1470                         "off channel (%d vs. %d)\n", src->bssid,
1471                         dst->channel, src->stats.received_channel);
1472 
1473         dst->capability = src->capability;
1474         memcpy(dst->rates, src->rates, src->rates_len);
1475         dst->rates_len = src->rates_len;
1476         memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
1477         dst->rates_ex_len = src->rates_ex_len;
1478 
1479         dst->mode = src->mode;
1480         dst->flags = src->flags;
1481         dst->time_stamp[0] = src->time_stamp[0];
1482         dst->time_stamp[1] = src->time_stamp[1];
1483 
1484         dst->beacon_interval = src->beacon_interval;
1485         dst->listen_interval = src->listen_interval;
1486         dst->atim_window = src->atim_window;
1487         dst->erp_value = src->erp_value;
1488         dst->tim = src->tim;
1489 
1490         memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
1491         dst->wpa_ie_len = src->wpa_ie_len;
1492         memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
1493         dst->rsn_ie_len = src->rsn_ie_len;
1494 
1495         dst->last_scanned = jiffies;
1496         qos_active = src->qos_data.active;
1497         old_param = dst->qos_data.old_param_count;
1498         if (dst->flags & NETWORK_HAS_QOS_MASK)
1499                 memcpy(&dst->qos_data, &src->qos_data,
1500                        sizeof(struct libipw_qos_data));
1501         else {
1502                 dst->qos_data.supported = src->qos_data.supported;
1503                 dst->qos_data.param_count = src->qos_data.param_count;
1504         }
1505 
1506         if (dst->qos_data.supported == 1) {
1507                 if (dst->ssid_len)
1508                         LIBIPW_DEBUG_QOS
1509                             ("QoS the network %s is QoS supported\n",
1510                              dst->ssid);
1511                 else
1512                         LIBIPW_DEBUG_QOS
1513                             ("QoS the network is QoS supported\n");
1514         }
1515         dst->qos_data.active = qos_active;
1516         dst->qos_data.old_param_count = old_param;
1517 
1518         /* dst->last_associate is not overwritten */
1519 }
1520 
1521 static inline int is_beacon(__le16 fc)
1522 {
1523         return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON);
1524 }
1525 
1526 static void libipw_process_probe_response(struct libipw_device
1527                                                     *ieee, struct
1528                                                     libipw_probe_response
1529                                                     *beacon, struct libipw_rx_stats
1530                                                     *stats)
1531 {
1532         struct net_device *dev = ieee->dev;
1533         struct libipw_network network = { };
1534         struct libipw_network *target;
1535         struct libipw_network *oldest = NULL;
1536 #ifdef CONFIG_LIBIPW_DEBUG
1537         struct libipw_info_element *info_element = beacon->info_element;
1538 #endif
1539         unsigned long flags;
1540 
1541         LIBIPW_DEBUG_SCAN("'%*pE' (%pM): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
1542                      info_element->len, info_element->data,
1543                      beacon->header.addr3,
1544                      (beacon->capability & cpu_to_le16(1 << 0xf)) ? '1' : '0',
1545                      (beacon->capability & cpu_to_le16(1 << 0xe)) ? '1' : '0',
1546                      (beacon->capability & cpu_to_le16(1 << 0xd)) ? '1' : '0',
1547                      (beacon->capability & cpu_to_le16(1 << 0xc)) ? '1' : '0',
1548                      (beacon->capability & cpu_to_le16(1 << 0xb)) ? '1' : '0',
1549                      (beacon->capability & cpu_to_le16(1 << 0xa)) ? '1' : '0',
1550                      (beacon->capability & cpu_to_le16(1 << 0x9)) ? '1' : '0',
1551                      (beacon->capability & cpu_to_le16(1 << 0x8)) ? '1' : '0',
1552                      (beacon->capability & cpu_to_le16(1 << 0x7)) ? '1' : '0',
1553                      (beacon->capability & cpu_to_le16(1 << 0x6)) ? '1' : '0',
1554                      (beacon->capability & cpu_to_le16(1 << 0x5)) ? '1' : '0',
1555                      (beacon->capability & cpu_to_le16(1 << 0x4)) ? '1' : '0',
1556                      (beacon->capability & cpu_to_le16(1 << 0x3)) ? '1' : '0',
1557                      (beacon->capability & cpu_to_le16(1 << 0x2)) ? '1' : '0',
1558                      (beacon->capability & cpu_to_le16(1 << 0x1)) ? '1' : '0',
1559                      (beacon->capability & cpu_to_le16(1 << 0x0)) ? '1' : '0');
1560 
1561         if (libipw_network_init(ieee, beacon, &network, stats)) {
1562                 LIBIPW_DEBUG_SCAN("Dropped '%*pE' (%pM) via %s.\n",
1563                                   info_element->len, info_element->data,
1564                                   beacon->header.addr3,
1565                                   is_beacon(beacon->header.frame_ctl) ?
1566                                   "BEACON" : "PROBE RESPONSE");
1567                 return;
1568         }
1569 
1570         /* The network parsed correctly -- so now we scan our known networks
1571          * to see if we can find it in our list.
1572          *
1573          * NOTE:  This search is definitely not optimized.  Once its doing
1574          *        the "right thing" we'll optimize it for efficiency if
1575          *        necessary */
1576 
1577         /* Search for this entry in the list and update it if it is
1578          * already there. */
1579 
1580         spin_lock_irqsave(&ieee->lock, flags);
1581 
1582         list_for_each_entry(target, &ieee->network_list, list) {
1583                 if (is_same_network(target, &network))
1584                         break;
1585 
1586                 if ((oldest == NULL) ||
1587                     time_before(target->last_scanned, oldest->last_scanned))
1588                         oldest = target;
1589         }
1590 
1591         /* If we didn't find a match, then get a new network slot to initialize
1592          * with this beacon's information */
1593         if (&target->list == &ieee->network_list) {
1594                 if (list_empty(&ieee->network_free_list)) {
1595                         /* If there are no more slots, expire the oldest */
1596                         list_del(&oldest->list);
1597                         target = oldest;
1598                         LIBIPW_DEBUG_SCAN("Expired '%*pE' (%pM) from network list.\n",
1599                                           target->ssid_len, target->ssid,
1600                                           target->bssid);
1601                 } else {
1602                         /* Otherwise just pull from the free list */
1603                         target = list_entry(ieee->network_free_list.next,
1604                                             struct libipw_network, list);
1605                         list_del(ieee->network_free_list.next);
1606                 }
1607 
1608 #ifdef CONFIG_LIBIPW_DEBUG
1609                 LIBIPW_DEBUG_SCAN("Adding '%*pE' (%pM) via %s.\n",
1610                                   network.ssid_len, network.ssid,
1611                                   network.bssid,
1612                                   is_beacon(beacon->header.frame_ctl) ?
1613                                   "BEACON" : "PROBE RESPONSE");
1614 #endif
1615                 memcpy(target, &network, sizeof(*target));
1616                 list_add_tail(&target->list, &ieee->network_list);
1617         } else {
1618                 LIBIPW_DEBUG_SCAN("Updating '%*pE' (%pM) via %s.\n",
1619                                   target->ssid_len, target->ssid,
1620                                   target->bssid,
1621                                   is_beacon(beacon->header.frame_ctl) ?
1622                                   "BEACON" : "PROBE RESPONSE");
1623                 update_network(target, &network);
1624         }
1625 
1626         spin_unlock_irqrestore(&ieee->lock, flags);
1627 
1628         if (is_beacon(beacon->header.frame_ctl)) {
1629                 if (ieee->handle_beacon != NULL)
1630                         ieee->handle_beacon(dev, beacon, target);
1631         } else {
1632                 if (ieee->handle_probe_response != NULL)
1633                         ieee->handle_probe_response(dev, beacon, target);
1634         }
1635 }
1636 
1637 void libipw_rx_mgt(struct libipw_device *ieee,
1638                       struct libipw_hdr_4addr *header,
1639                       struct libipw_rx_stats *stats)
1640 {
1641         switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
1642         case IEEE80211_STYPE_ASSOC_RESP:
1643                 LIBIPW_DEBUG_MGMT("received ASSOCIATION RESPONSE (%d)\n",
1644                                      WLAN_FC_GET_STYPE(le16_to_cpu
1645                                                        (header->frame_ctl)));
1646                 libipw_handle_assoc_resp(ieee,
1647                                             (struct libipw_assoc_response *)
1648                                             header, stats);
1649                 break;
1650 
1651         case IEEE80211_STYPE_REASSOC_RESP:
1652                 LIBIPW_DEBUG_MGMT("received REASSOCIATION RESPONSE (%d)\n",
1653                                      WLAN_FC_GET_STYPE(le16_to_cpu
1654                                                        (header->frame_ctl)));
1655                 break;
1656 
1657         case IEEE80211_STYPE_PROBE_REQ:
1658                 LIBIPW_DEBUG_MGMT("received auth (%d)\n",
1659                                      WLAN_FC_GET_STYPE(le16_to_cpu
1660                                                        (header->frame_ctl)));
1661 
1662                 if (ieee->handle_probe_request != NULL)
1663                         ieee->handle_probe_request(ieee->dev,
1664                                                    (struct
1665                                                     libipw_probe_request *)
1666                                                    header, stats);
1667                 break;
1668 
1669         case IEEE80211_STYPE_PROBE_RESP:
1670                 LIBIPW_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
1671                                      WLAN_FC_GET_STYPE(le16_to_cpu
1672                                                        (header->frame_ctl)));
1673                 LIBIPW_DEBUG_SCAN("Probe response\n");
1674                 libipw_process_probe_response(ieee,
1675                                                  (struct
1676                                                   libipw_probe_response *)
1677                                                  header, stats);
1678                 break;
1679 
1680         case IEEE80211_STYPE_BEACON:
1681                 LIBIPW_DEBUG_MGMT("received BEACON (%d)\n",
1682                                      WLAN_FC_GET_STYPE(le16_to_cpu
1683                                                        (header->frame_ctl)));
1684                 LIBIPW_DEBUG_SCAN("Beacon\n");
1685                 libipw_process_probe_response(ieee,
1686                                                  (struct
1687                                                   libipw_probe_response *)
1688                                                  header, stats);
1689                 break;
1690         case IEEE80211_STYPE_AUTH:
1691 
1692                 LIBIPW_DEBUG_MGMT("received auth (%d)\n",
1693                                      WLAN_FC_GET_STYPE(le16_to_cpu
1694                                                        (header->frame_ctl)));
1695 
1696                 if (ieee->handle_auth != NULL)
1697                         ieee->handle_auth(ieee->dev,
1698                                           (struct libipw_auth *)header);
1699                 break;
1700 
1701         case IEEE80211_STYPE_DISASSOC:
1702                 if (ieee->handle_disassoc != NULL)
1703                         ieee->handle_disassoc(ieee->dev,
1704                                               (struct libipw_disassoc *)
1705                                               header);
1706                 break;
1707 
1708         case IEEE80211_STYPE_ACTION:
1709                 LIBIPW_DEBUG_MGMT("ACTION\n");
1710                 if (ieee->handle_action)
1711                         ieee->handle_action(ieee->dev,
1712                                             (struct libipw_action *)
1713                                             header, stats);
1714                 break;
1715 
1716         case IEEE80211_STYPE_REASSOC_REQ:
1717                 LIBIPW_DEBUG_MGMT("received reassoc (%d)\n",
1718                                      WLAN_FC_GET_STYPE(le16_to_cpu
1719                                                        (header->frame_ctl)));
1720 
1721                 LIBIPW_DEBUG_MGMT("%s: LIBIPW_REASSOC_REQ received\n",
1722                                      ieee->dev->name);
1723                 if (ieee->handle_reassoc_request != NULL)
1724                         ieee->handle_reassoc_request(ieee->dev,
1725                                                     (struct libipw_reassoc_request *)
1726                                                      header);
1727                 break;
1728 
1729         case IEEE80211_STYPE_ASSOC_REQ:
1730                 LIBIPW_DEBUG_MGMT("received assoc (%d)\n",
1731                                      WLAN_FC_GET_STYPE(le16_to_cpu
1732                                                        (header->frame_ctl)));
1733 
1734                 LIBIPW_DEBUG_MGMT("%s: LIBIPW_ASSOC_REQ received\n",
1735                                      ieee->dev->name);
1736                 if (ieee->handle_assoc_request != NULL)
1737                         ieee->handle_assoc_request(ieee->dev);
1738                 break;
1739 
1740         case IEEE80211_STYPE_DEAUTH:
1741                 LIBIPW_DEBUG_MGMT("DEAUTH\n");
1742                 if (ieee->handle_deauth != NULL)
1743                         ieee->handle_deauth(ieee->dev,
1744                                             (struct libipw_deauth *)
1745                                             header);
1746                 break;
1747         default:
1748                 LIBIPW_DEBUG_MGMT("received UNKNOWN (%d)\n",
1749                                      WLAN_FC_GET_STYPE(le16_to_cpu
1750                                                        (header->frame_ctl)));
1751                 LIBIPW_DEBUG_MGMT("%s: Unknown management packet: %d\n",
1752                                      ieee->dev->name,
1753                                      WLAN_FC_GET_STYPE(le16_to_cpu
1754                                                        (header->frame_ctl)));
1755                 break;
1756         }
1757 }
1758 
1759 EXPORT_SYMBOL_GPL(libipw_rx_any);
1760 EXPORT_SYMBOL(libipw_rx_mgt);
1761 EXPORT_SYMBOL(libipw_rx);