linux/drivers/net/wireless/intel/ipw2x00/libipw_rx.c
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   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/gfp.h>
  21#include <linux/in.h>
  22#include <linux/ip.h>
  23#include <linux/kernel.h>
  24#include <linux/module.h>
  25#include <linux/netdevice.h>
  26#include <linux/proc_fs.h>
  27#include <linux/skbuff.h>
  28#include <linux/tcp.h>
  29#include <linux/types.h>
  30#include <linux/wireless.h>
  31#include <linux/etherdevice.h>
  32#include <asm/uaccess.h>
  33#include <linux/ctype.h>
  34
  35#include <net/lib80211.h>
  36
  37#include "libipw.h"
  38
  39static void libipw_monitor_rx(struct libipw_device *ieee,
  40                                        struct sk_buff *skb,
  41                                        struct libipw_rx_stats *rx_stats)
  42{
  43        struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
  44        u16 fc = le16_to_cpu(hdr->frame_control);
  45
  46        skb->dev = ieee->dev;
  47        skb_reset_mac_header(skb);
  48        skb_pull(skb, libipw_get_hdrlen(fc));
  49        skb->pkt_type = PACKET_OTHERHOST;
  50        skb->protocol = htons(ETH_P_80211_RAW);
  51        memset(skb->cb, 0, sizeof(skb->cb));
  52        netif_rx(skb);
  53}
  54
  55/* Called only as a tasklet (software IRQ) */
  56static struct libipw_frag_entry *libipw_frag_cache_find(struct
  57                                                              libipw_device
  58                                                              *ieee,
  59                                                              unsigned int seq,
  60                                                              unsigned int frag,
  61                                                              u8 * src,
  62                                                              u8 * dst)
  63{
  64        struct libipw_frag_entry *entry;
  65        int i;
  66
  67        for (i = 0; i < LIBIPW_FRAG_CACHE_LEN; i++) {
  68                entry = &ieee->frag_cache[i];
  69                if (entry->skb != NULL &&
  70                    time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
  71                        LIBIPW_DEBUG_FRAG("expiring fragment cache entry "
  72                                             "seq=%u last_frag=%u\n",
  73                                             entry->seq, entry->last_frag);
  74                        dev_kfree_skb_any(entry->skb);
  75                        entry->skb = NULL;
  76                }
  77
  78                if (entry->skb != NULL && entry->seq == seq &&
  79                    (entry->last_frag + 1 == frag || frag == -1) &&
  80                    ether_addr_equal(entry->src_addr, src) &&
  81                    ether_addr_equal(entry->dst_addr, dst))
  82                        return entry;
  83        }
  84
  85        return NULL;
  86}
  87
  88/* Called only as a tasklet (software IRQ) */
  89static struct sk_buff *libipw_frag_cache_get(struct libipw_device *ieee,
  90                                                struct libipw_hdr_4addr *hdr)
  91{
  92        struct sk_buff *skb = NULL;
  93        u16 sc;
  94        unsigned int frag, seq;
  95        struct libipw_frag_entry *entry;
  96
  97        sc = le16_to_cpu(hdr->seq_ctl);
  98        frag = WLAN_GET_SEQ_FRAG(sc);
  99        seq = WLAN_GET_SEQ_SEQ(sc);
 100
 101        if (frag == 0) {
 102                /* Reserve enough space to fit maximum frame length */
 103                skb = dev_alloc_skb(ieee->dev->mtu +
 104                                    sizeof(struct libipw_hdr_4addr) +
 105                                    8 /* LLC */  +
 106                                    2 /* alignment */  +
 107                                    8 /* WEP */  + ETH_ALEN /* WDS */ );
 108                if (skb == NULL)
 109                        return NULL;
 110
 111                entry = &ieee->frag_cache[ieee->frag_next_idx];
 112                ieee->frag_next_idx++;
 113                if (ieee->frag_next_idx >= LIBIPW_FRAG_CACHE_LEN)
 114                        ieee->frag_next_idx = 0;
 115
 116                if (entry->skb != NULL)
 117                        dev_kfree_skb_any(entry->skb);
 118
 119                entry->first_frag_time = jiffies;
 120                entry->seq = seq;
 121                entry->last_frag = frag;
 122                entry->skb = skb;
 123                memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
 124                memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
 125        } else {
 126                /* received a fragment of a frame for which the head fragment
 127                 * should have already been received */
 128                entry = libipw_frag_cache_find(ieee, seq, frag, hdr->addr2,
 129                                                  hdr->addr1);
 130                if (entry != NULL) {
 131                        entry->last_frag = frag;
 132                        skb = entry->skb;
 133                }
 134        }
 135
 136        return skb;
 137}
 138
 139/* Called only as a tasklet (software IRQ) */
 140static int libipw_frag_cache_invalidate(struct libipw_device *ieee,
 141                                           struct libipw_hdr_4addr *hdr)
 142{
 143        u16 sc;
 144        unsigned int seq;
 145        struct libipw_frag_entry *entry;
 146
 147        sc = le16_to_cpu(hdr->seq_ctl);
 148        seq = WLAN_GET_SEQ_SEQ(sc);
 149
 150        entry = libipw_frag_cache_find(ieee, seq, -1, hdr->addr2,
 151                                          hdr->addr1);
 152
 153        if (entry == NULL) {
 154                LIBIPW_DEBUG_FRAG("could not invalidate fragment cache "
 155                                     "entry (seq=%u)\n", seq);
 156                return -1;
 157        }
 158
 159        entry->skb = NULL;
 160        return 0;
 161}
 162
 163#ifdef NOT_YET
 164/* libipw_rx_frame_mgtmt
 165 *
 166 * Responsible for handling management control frames
 167 *
 168 * Called by libipw_rx */
 169static int
 170libipw_rx_frame_mgmt(struct libipw_device *ieee, struct sk_buff *skb,
 171                        struct libipw_rx_stats *rx_stats, u16 type,
 172                        u16 stype)
 173{
 174        if (ieee->iw_mode == IW_MODE_MASTER) {
 175                printk(KERN_DEBUG "%s: Master mode not yet supported.\n",
 176                       ieee->dev->name);
 177                return 0;
 178/*
 179  hostap_update_sta_ps(ieee, (struct hostap_libipw_hdr_4addr *)
 180  skb->data);*/
 181        }
 182
 183        if (ieee->hostapd && type == WLAN_FC_TYPE_MGMT) {
 184                if (stype == WLAN_FC_STYPE_BEACON &&
 185                    ieee->iw_mode == IW_MODE_MASTER) {
 186                        struct sk_buff *skb2;
 187                        /* Process beacon frames also in kernel driver to
 188                         * update STA(AP) table statistics */
 189                        skb2 = skb_clone(skb, GFP_ATOMIC);
 190                        if (skb2)
 191                                hostap_rx(skb2->dev, skb2, rx_stats);
 192                }
 193
 194                /* send management frames to the user space daemon for
 195                 * processing */
 196                ieee->apdevstats.rx_packets++;
 197                ieee->apdevstats.rx_bytes += skb->len;
 198                prism2_rx_80211(ieee->apdev, skb, rx_stats, PRISM2_RX_MGMT);
 199                return 0;
 200        }
 201
 202        if (ieee->iw_mode == IW_MODE_MASTER) {
 203                if (type != WLAN_FC_TYPE_MGMT && type != WLAN_FC_TYPE_CTRL) {
 204                        printk(KERN_DEBUG "%s: unknown management frame "
 205                               "(type=0x%02x, stype=0x%02x) dropped\n",
 206                               skb->dev->name, type, stype);
 207                        return -1;
 208                }
 209
 210                hostap_rx(skb->dev, skb, rx_stats);
 211                return 0;
 212        }
 213
 214        printk(KERN_DEBUG "%s: hostap_rx_frame_mgmt: management frame "
 215               "received in non-Host AP mode\n", skb->dev->name);
 216        return -1;
 217}
 218#endif
 219
 220/* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
 221/* Ethernet-II snap header (RFC1042 for most EtherTypes) */
 222static unsigned char libipw_rfc1042_header[] =
 223    { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
 224
 225/* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
 226static unsigned char libipw_bridge_tunnel_header[] =
 227    { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
 228/* No encapsulation header if EtherType < 0x600 (=length) */
 229
 230/* Called by libipw_rx_frame_decrypt */
 231static int libipw_is_eapol_frame(struct libipw_device *ieee,
 232                                    struct sk_buff *skb)
 233{
 234        struct net_device *dev = ieee->dev;
 235        u16 fc, ethertype;
 236        struct libipw_hdr_3addr *hdr;
 237        u8 *pos;
 238
 239        if (skb->len < 24)
 240                return 0;
 241
 242        hdr = (struct libipw_hdr_3addr *)skb->data;
 243        fc = le16_to_cpu(hdr->frame_ctl);
 244
 245        /* check that the frame is unicast frame to us */
 246        if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 247            IEEE80211_FCTL_TODS &&
 248            ether_addr_equal(hdr->addr1, dev->dev_addr) &&
 249            ether_addr_equal(hdr->addr3, dev->dev_addr)) {
 250                /* ToDS frame with own addr BSSID and DA */
 251        } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 252                   IEEE80211_FCTL_FROMDS &&
 253                   ether_addr_equal(hdr->addr1, dev->dev_addr)) {
 254                /* FromDS frame with own addr as DA */
 255        } else
 256                return 0;
 257
 258        if (skb->len < 24 + 8)
 259                return 0;
 260
 261        /* check for port access entity Ethernet type */
 262        pos = skb->data + 24;
 263        ethertype = (pos[6] << 8) | pos[7];
 264        if (ethertype == ETH_P_PAE)
 265                return 1;
 266
 267        return 0;
 268}
 269
 270/* Called only as a tasklet (software IRQ), by libipw_rx */
 271static int
 272libipw_rx_frame_decrypt(struct libipw_device *ieee, struct sk_buff *skb,
 273                           struct lib80211_crypt_data *crypt)
 274{
 275        struct libipw_hdr_3addr *hdr;
 276        int res, hdrlen;
 277
 278        if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
 279                return 0;
 280
 281        hdr = (struct libipw_hdr_3addr *)skb->data;
 282        hdrlen = libipw_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 283
 284        atomic_inc(&crypt->refcnt);
 285        res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
 286        atomic_dec(&crypt->refcnt);
 287        if (res < 0) {
 288                LIBIPW_DEBUG_DROP("decryption failed (SA=%pM) res=%d\n",
 289                                     hdr->addr2, res);
 290                if (res == -2)
 291                        LIBIPW_DEBUG_DROP("Decryption failed ICV "
 292                                             "mismatch (key %d)\n",
 293                                             skb->data[hdrlen + 3] >> 6);
 294                ieee->ieee_stats.rx_discards_undecryptable++;
 295                return -1;
 296        }
 297
 298        return res;
 299}
 300
 301/* Called only as a tasklet (software IRQ), by libipw_rx */
 302static int
 303libipw_rx_frame_decrypt_msdu(struct libipw_device *ieee,
 304                                struct sk_buff *skb, int keyidx,
 305                                struct lib80211_crypt_data *crypt)
 306{
 307        struct libipw_hdr_3addr *hdr;
 308        int res, hdrlen;
 309
 310        if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
 311                return 0;
 312
 313        hdr = (struct libipw_hdr_3addr *)skb->data;
 314        hdrlen = libipw_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 315
 316        atomic_inc(&crypt->refcnt);
 317        res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
 318        atomic_dec(&crypt->refcnt);
 319        if (res < 0) {
 320                printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
 321                       " (SA=%pM keyidx=%d)\n", ieee->dev->name, hdr->addr2,
 322                       keyidx);
 323                return -1;
 324        }
 325
 326        return 0;
 327}
 328
 329/* All received frames are sent to this function. @skb contains the frame in
 330 * IEEE 802.11 format, i.e., in the format it was sent over air.
 331 * This function is called only as a tasklet (software IRQ). */
 332int libipw_rx(struct libipw_device *ieee, struct sk_buff *skb,
 333                 struct libipw_rx_stats *rx_stats)
 334{
 335        struct net_device *dev = ieee->dev;
 336        struct libipw_hdr_4addr *hdr;
 337        size_t hdrlen;
 338        u16 fc, type, stype, sc;
 339        unsigned int frag;
 340        u8 *payload;
 341        u16 ethertype;
 342#ifdef NOT_YET
 343        struct net_device *wds = NULL;
 344        struct sk_buff *skb2 = NULL;
 345        struct net_device *wds = NULL;
 346        int frame_authorized = 0;
 347        int from_assoc_ap = 0;
 348        void *sta = NULL;
 349#endif
 350        u8 dst[ETH_ALEN];
 351        u8 src[ETH_ALEN];
 352        struct lib80211_crypt_data *crypt = NULL;
 353        int keyidx = 0;
 354        int can_be_decrypted = 0;
 355
 356        hdr = (struct libipw_hdr_4addr *)skb->data;
 357        if (skb->len < 10) {
 358                printk(KERN_INFO "%s: SKB length < 10\n", dev->name);
 359                goto rx_dropped;
 360        }
 361
 362        fc = le16_to_cpu(hdr->frame_ctl);
 363        type = WLAN_FC_GET_TYPE(fc);
 364        stype = WLAN_FC_GET_STYPE(fc);
 365        sc = le16_to_cpu(hdr->seq_ctl);
 366        frag = WLAN_GET_SEQ_FRAG(sc);
 367        hdrlen = libipw_get_hdrlen(fc);
 368
 369        if (skb->len < hdrlen) {
 370                printk(KERN_INFO "%s: invalid SKB length %d\n",
 371                        dev->name, skb->len);
 372                goto rx_dropped;
 373        }
 374
 375        /* Put this code here so that we avoid duplicating it in all
 376         * Rx paths. - Jean II */
 377#ifdef CONFIG_WIRELESS_EXT
 378#ifdef IW_WIRELESS_SPY          /* defined in iw_handler.h */
 379        /* If spy monitoring on */
 380        if (ieee->spy_data.spy_number > 0) {
 381                struct iw_quality wstats;
 382
 383                wstats.updated = 0;
 384                if (rx_stats->mask & LIBIPW_STATMASK_RSSI) {
 385                        wstats.level = rx_stats->signal;
 386                        wstats.updated |= IW_QUAL_LEVEL_UPDATED;
 387                } else
 388                        wstats.updated |= IW_QUAL_LEVEL_INVALID;
 389
 390                if (rx_stats->mask & LIBIPW_STATMASK_NOISE) {
 391                        wstats.noise = rx_stats->noise;
 392                        wstats.updated |= IW_QUAL_NOISE_UPDATED;
 393                } else
 394                        wstats.updated |= IW_QUAL_NOISE_INVALID;
 395
 396                if (rx_stats->mask & LIBIPW_STATMASK_SIGNAL) {
 397                        wstats.qual = rx_stats->signal;
 398                        wstats.updated |= IW_QUAL_QUAL_UPDATED;
 399                } else
 400                        wstats.updated |= IW_QUAL_QUAL_INVALID;
 401
 402                /* Update spy records */
 403                wireless_spy_update(ieee->dev, hdr->addr2, &wstats);
 404        }
 405#endif                          /* IW_WIRELESS_SPY */
 406#endif                          /* CONFIG_WIRELESS_EXT */
 407
 408#ifdef NOT_YET
 409        hostap_update_rx_stats(local->ap, hdr, rx_stats);
 410#endif
 411
 412        if (ieee->iw_mode == IW_MODE_MONITOR) {
 413                dev->stats.rx_packets++;
 414                dev->stats.rx_bytes += skb->len;
 415                libipw_monitor_rx(ieee, skb, rx_stats);
 416                return 1;
 417        }
 418
 419        can_be_decrypted = (is_multicast_ether_addr(hdr->addr1) ||
 420                            is_broadcast_ether_addr(hdr->addr2)) ?
 421            ieee->host_mc_decrypt : ieee->host_decrypt;
 422
 423        if (can_be_decrypted) {
 424                if (skb->len >= hdrlen + 3) {
 425                        /* Top two-bits of byte 3 are the key index */
 426                        keyidx = skb->data[hdrlen + 3] >> 6;
 427                }
 428
 429                /* ieee->crypt[] is WEP_KEY (4) in length.  Given that keyidx
 430                 * is only allowed 2-bits of storage, no value of keyidx can
 431                 * be provided via above code that would result in keyidx
 432                 * being out of range */
 433                crypt = ieee->crypt_info.crypt[keyidx];
 434
 435#ifdef NOT_YET
 436                sta = NULL;
 437
 438                /* Use station specific key to override default keys if the
 439                 * receiver address is a unicast address ("individual RA"). If
 440                 * bcrx_sta_key parameter is set, station specific key is used
 441                 * even with broad/multicast targets (this is against IEEE
 442                 * 802.11, but makes it easier to use different keys with
 443                 * stations that do not support WEP key mapping). */
 444
 445                if (is_unicast_ether_addr(hdr->addr1) || local->bcrx_sta_key)
 446                        (void)hostap_handle_sta_crypto(local, hdr, &crypt,
 447                                                       &sta);
 448#endif
 449
 450                /* allow NULL decrypt to indicate an station specific override
 451                 * for default encryption */
 452                if (crypt && (crypt->ops == NULL ||
 453                              crypt->ops->decrypt_mpdu == NULL))
 454                        crypt = NULL;
 455
 456                if (!crypt && (fc & IEEE80211_FCTL_PROTECTED)) {
 457                        /* This seems to be triggered by some (multicast?)
 458                         * frames from other than current BSS, so just drop the
 459                         * frames silently instead of filling system log with
 460                         * these reports. */
 461                        LIBIPW_DEBUG_DROP("Decryption failed (not set)"
 462                                             " (SA=%pM)\n", hdr->addr2);
 463                        ieee->ieee_stats.rx_discards_undecryptable++;
 464                        goto rx_dropped;
 465                }
 466        }
 467#ifdef NOT_YET
 468        if (type != WLAN_FC_TYPE_DATA) {
 469                if (type == WLAN_FC_TYPE_MGMT && stype == WLAN_FC_STYPE_AUTH &&
 470                    fc & IEEE80211_FCTL_PROTECTED && ieee->host_decrypt &&
 471                    (keyidx = hostap_rx_frame_decrypt(ieee, skb, crypt)) < 0) {
 472                        printk(KERN_DEBUG "%s: failed to decrypt mgmt::auth "
 473                               "from %pM\n", dev->name, hdr->addr2);
 474                        /* TODO: could inform hostapd about this so that it
 475                         * could send auth failure report */
 476                        goto rx_dropped;
 477                }
 478
 479                if (libipw_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
 480                        goto rx_dropped;
 481                else
 482                        goto rx_exit;
 483        }
 484#endif
 485        /* drop duplicate 802.11 retransmissions (IEEE 802.11 Chap. 9.29) */
 486        if (sc == ieee->prev_seq_ctl)
 487                goto rx_dropped;
 488        else
 489                ieee->prev_seq_ctl = sc;
 490
 491        /* Data frame - extract src/dst addresses */
 492        if (skb->len < LIBIPW_3ADDR_LEN)
 493                goto rx_dropped;
 494
 495        switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
 496        case IEEE80211_FCTL_FROMDS:
 497                memcpy(dst, hdr->addr1, ETH_ALEN);
 498                memcpy(src, hdr->addr3, ETH_ALEN);
 499                break;
 500        case IEEE80211_FCTL_TODS:
 501                memcpy(dst, hdr->addr3, ETH_ALEN);
 502                memcpy(src, hdr->addr2, ETH_ALEN);
 503                break;
 504        case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
 505                if (skb->len < LIBIPW_4ADDR_LEN)
 506                        goto rx_dropped;
 507                memcpy(dst, hdr->addr3, ETH_ALEN);
 508                memcpy(src, hdr->addr4, ETH_ALEN);
 509                break;
 510        case 0:
 511                memcpy(dst, hdr->addr1, ETH_ALEN);
 512                memcpy(src, hdr->addr2, ETH_ALEN);
 513                break;
 514        }
 515
 516#ifdef NOT_YET
 517        if (hostap_rx_frame_wds(ieee, hdr, fc, &wds))
 518                goto rx_dropped;
 519        if (wds) {
 520                skb->dev = dev = wds;
 521                stats = hostap_get_stats(dev);
 522        }
 523
 524        if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
 525            (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 526            IEEE80211_FCTL_FROMDS && ieee->stadev &&
 527            ether_addr_equal(hdr->addr2, ieee->assoc_ap_addr)) {
 528                /* Frame from BSSID of the AP for which we are a client */
 529                skb->dev = dev = ieee->stadev;
 530                stats = hostap_get_stats(dev);
 531                from_assoc_ap = 1;
 532        }
 533#endif
 534
 535#ifdef NOT_YET
 536        if ((ieee->iw_mode == IW_MODE_MASTER ||
 537             ieee->iw_mode == IW_MODE_REPEAT) && !from_assoc_ap) {
 538                switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats,
 539                                             wds != NULL)) {
 540                case AP_RX_CONTINUE_NOT_AUTHORIZED:
 541                        frame_authorized = 0;
 542                        break;
 543                case AP_RX_CONTINUE:
 544                        frame_authorized = 1;
 545                        break;
 546                case AP_RX_DROP:
 547                        goto rx_dropped;
 548                case AP_RX_EXIT:
 549                        goto rx_exit;
 550                }
 551        }
 552#endif
 553
 554        /* Nullfunc frames may have PS-bit set, so they must be passed to
 555         * hostap_handle_sta_rx() before being dropped here. */
 556
 557        stype &= ~IEEE80211_STYPE_QOS_DATA;
 558
 559        if (stype != IEEE80211_STYPE_DATA &&
 560            stype != IEEE80211_STYPE_DATA_CFACK &&
 561            stype != IEEE80211_STYPE_DATA_CFPOLL &&
 562            stype != IEEE80211_STYPE_DATA_CFACKPOLL) {
 563                if (stype != IEEE80211_STYPE_NULLFUNC)
 564                        LIBIPW_DEBUG_DROP("RX: dropped data frame "
 565                                             "with no data (type=0x%02x, "
 566                                             "subtype=0x%02x, len=%d)\n",
 567                                             type, stype, skb->len);
 568                goto rx_dropped;
 569        }
 570
 571        /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
 572
 573        if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
 574            (keyidx = libipw_rx_frame_decrypt(ieee, skb, crypt)) < 0)
 575                goto rx_dropped;
 576
 577        hdr = (struct libipw_hdr_4addr *)skb->data;
 578
 579        /* skb: hdr + (possibly fragmented) plaintext payload */
 580        // PR: FIXME: hostap has additional conditions in the "if" below:
 581        // ieee->host_decrypt && (fc & IEEE80211_FCTL_PROTECTED) &&
 582        if ((frag != 0) || (fc & IEEE80211_FCTL_MOREFRAGS)) {
 583                int flen;
 584                struct sk_buff *frag_skb = libipw_frag_cache_get(ieee, hdr);
 585                LIBIPW_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
 586
 587                if (!frag_skb) {
 588                        LIBIPW_DEBUG(LIBIPW_DL_RX | LIBIPW_DL_FRAG,
 589                                        "Rx cannot get skb from fragment "
 590                                        "cache (morefrag=%d seq=%u frag=%u)\n",
 591                                        (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
 592                                        WLAN_GET_SEQ_SEQ(sc), frag);
 593                        goto rx_dropped;
 594                }
 595
 596                flen = skb->len;
 597                if (frag != 0)
 598                        flen -= hdrlen;
 599
 600                if (frag_skb->tail + flen > frag_skb->end) {
 601                        printk(KERN_WARNING "%s: host decrypted and "
 602                               "reassembled frame did not fit skb\n",
 603                               dev->name);
 604                        libipw_frag_cache_invalidate(ieee, hdr);
 605                        goto rx_dropped;
 606                }
 607
 608                if (frag == 0) {
 609                        /* copy first fragment (including full headers) into
 610                         * beginning of the fragment cache skb */
 611                        skb_copy_from_linear_data(skb, skb_put(frag_skb, flen), flen);
 612                } else {
 613                        /* append frame payload to the end of the fragment
 614                         * cache skb */
 615                        skb_copy_from_linear_data_offset(skb, hdrlen,
 616                                      skb_put(frag_skb, flen), flen);
 617                }
 618                dev_kfree_skb_any(skb);
 619                skb = NULL;
 620
 621                if (fc & IEEE80211_FCTL_MOREFRAGS) {
 622                        /* more fragments expected - leave the skb in fragment
 623                         * cache for now; it will be delivered to upper layers
 624                         * after all fragments have been received */
 625                        goto rx_exit;
 626                }
 627
 628                /* this was the last fragment and the frame will be
 629                 * delivered, so remove skb from fragment cache */
 630                skb = frag_skb;
 631                hdr = (struct libipw_hdr_4addr *)skb->data;
 632                libipw_frag_cache_invalidate(ieee, hdr);
 633        }
 634
 635        /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
 636         * encrypted/authenticated */
 637        if ((fc & IEEE80211_FCTL_PROTECTED) && can_be_decrypted &&
 638            libipw_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
 639                goto rx_dropped;
 640
 641        hdr = (struct libipw_hdr_4addr *)skb->data;
 642        if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep) {
 643                if (            /*ieee->ieee802_1x && */
 644                           libipw_is_eapol_frame(ieee, skb)) {
 645                        /* pass unencrypted EAPOL frames even if encryption is
 646                         * configured */
 647                } else {
 648                        LIBIPW_DEBUG_DROP("encryption configured, but RX "
 649                                             "frame not encrypted (SA=%pM)\n",
 650                                             hdr->addr2);
 651                        goto rx_dropped;
 652                }
 653        }
 654
 655        if (crypt && !(fc & IEEE80211_FCTL_PROTECTED) && !ieee->open_wep &&
 656            !libipw_is_eapol_frame(ieee, skb)) {
 657                LIBIPW_DEBUG_DROP("dropped unencrypted RX data "
 658                                     "frame from %pM (drop_unencrypted=1)\n",
 659                                     hdr->addr2);
 660                goto rx_dropped;
 661        }
 662
 663        /* If the frame was decrypted in hardware, we may need to strip off
 664         * any security data (IV, ICV, etc) that was left behind */
 665        if (!can_be_decrypted && (fc & IEEE80211_FCTL_PROTECTED) &&
 666            ieee->host_strip_iv_icv) {
 667                int trimlen = 0;
 668
 669                /* Top two-bits of byte 3 are the key index */
 670                if (skb->len >= hdrlen + 3)
 671                        keyidx = skb->data[hdrlen + 3] >> 6;
 672
 673                /* To strip off any security data which appears before the
 674                 * payload, we simply increase hdrlen (as the header gets
 675                 * chopped off immediately below). For the security data which
 676                 * appears after the payload, we use skb_trim. */
 677
 678                switch (ieee->sec.encode_alg[keyidx]) {
 679                case SEC_ALG_WEP:
 680                        /* 4 byte IV */
 681                        hdrlen += 4;
 682                        /* 4 byte ICV */
 683                        trimlen = 4;
 684                        break;
 685                case SEC_ALG_TKIP:
 686                        /* 4 byte IV, 4 byte ExtIV */
 687                        hdrlen += 8;
 688                        /* 8 byte MIC, 4 byte ICV */
 689                        trimlen = 12;
 690                        break;
 691                case SEC_ALG_CCMP:
 692                        /* 8 byte CCMP header */
 693                        hdrlen += 8;
 694                        /* 8 byte MIC */
 695                        trimlen = 8;
 696                        break;
 697                }
 698
 699                if (skb->len < trimlen)
 700                        goto rx_dropped;
 701
 702                __skb_trim(skb, skb->len - trimlen);
 703
 704                if (skb->len < hdrlen)
 705                        goto rx_dropped;
 706        }
 707
 708        /* skb: hdr + (possible reassembled) full plaintext payload */
 709
 710        payload = skb->data + hdrlen;
 711        ethertype = (payload[6] << 8) | payload[7];
 712
 713#ifdef NOT_YET
 714        /* If IEEE 802.1X is used, check whether the port is authorized to send
 715         * the received frame. */
 716        if (ieee->ieee802_1x && ieee->iw_mode == IW_MODE_MASTER) {
 717                if (ethertype == ETH_P_PAE) {
 718                        printk(KERN_DEBUG "%s: RX: IEEE 802.1X frame\n",
 719                               dev->name);
 720                        if (ieee->hostapd && ieee->apdev) {
 721                                /* Send IEEE 802.1X frames to the user
 722                                 * space daemon for processing */
 723                                prism2_rx_80211(ieee->apdev, skb, rx_stats,
 724                                                PRISM2_RX_MGMT);
 725                                ieee->apdevstats.rx_packets++;
 726                                ieee->apdevstats.rx_bytes += skb->len;
 727                                goto rx_exit;
 728                        }
 729                } else if (!frame_authorized) {
 730                        printk(KERN_DEBUG "%s: dropped frame from "
 731                               "unauthorized port (IEEE 802.1X): "
 732                               "ethertype=0x%04x\n", dev->name, ethertype);
 733                        goto rx_dropped;
 734                }
 735        }
 736#endif
 737
 738        /* convert hdr + possible LLC headers into Ethernet header */
 739        if (skb->len - hdrlen >= 8 &&
 740            ((memcmp(payload, libipw_rfc1042_header, SNAP_SIZE) == 0 &&
 741              ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
 742             memcmp(payload, libipw_bridge_tunnel_header, SNAP_SIZE) == 0)) {
 743                /* remove RFC1042 or Bridge-Tunnel encapsulation and
 744                 * replace EtherType */
 745                skb_pull(skb, hdrlen + SNAP_SIZE);
 746                memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
 747                memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
 748        } else {
 749                __be16 len;
 750                /* Leave Ethernet header part of hdr and full payload */
 751                skb_pull(skb, hdrlen);
 752                len = htons(skb->len);
 753                memcpy(skb_push(skb, 2), &len, 2);
 754                memcpy(skb_push(skb, ETH_ALEN), src, ETH_ALEN);
 755                memcpy(skb_push(skb, ETH_ALEN), dst, ETH_ALEN);
 756        }
 757
 758#ifdef NOT_YET
 759        if (wds && ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 760                    IEEE80211_FCTL_TODS) && skb->len >= ETH_HLEN + ETH_ALEN) {
 761                /* Non-standard frame: get addr4 from its bogus location after
 762                 * the payload */
 763                skb_copy_to_linear_data_offset(skb, ETH_ALEN,
 764                                               skb->data + skb->len - ETH_ALEN,
 765                                               ETH_ALEN);
 766                skb_trim(skb, skb->len - ETH_ALEN);
 767        }
 768#endif
 769
 770        dev->stats.rx_packets++;
 771        dev->stats.rx_bytes += skb->len;
 772
 773#ifdef NOT_YET
 774        if (ieee->iw_mode == IW_MODE_MASTER && !wds && ieee->ap->bridge_packets) {
 775                if (is_multicast_ether_addr(dst)) {
 776                        /* copy multicast frame both to the higher layers and
 777                         * to the wireless media */
 778                        ieee->ap->bridged_multicast++;
 779                        skb2 = skb_clone(skb, GFP_ATOMIC);
 780                        if (skb2 == NULL)
 781                                printk(KERN_DEBUG "%s: skb_clone failed for "
 782                                       "multicast frame\n", dev->name);
 783                } else if (hostap_is_sta_assoc(ieee->ap, dst)) {
 784                        /* send frame directly to the associated STA using
 785                         * wireless media and not passing to higher layers */
 786                        ieee->ap->bridged_unicast++;
 787                        skb2 = skb;
 788                        skb = NULL;
 789                }
 790        }
 791
 792        if (skb2 != NULL) {
 793                /* send to wireless media */
 794                skb2->dev = dev;
 795                skb2->protocol = htons(ETH_P_802_3);
 796                skb_reset_mac_header(skb2);
 797                skb_reset_network_header(skb2);
 798                /* skb2->network_header += ETH_HLEN; */
 799                dev_queue_xmit(skb2);
 800        }
 801#endif
 802
 803        if (skb) {
 804                skb->protocol = eth_type_trans(skb, dev);
 805                memset(skb->cb, 0, sizeof(skb->cb));
 806                skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
 807                if (netif_rx(skb) == NET_RX_DROP) {
 808                        /* netif_rx always succeeds, but it might drop
 809                         * the packet.  If it drops the packet, we log that
 810                         * in our stats. */
 811                        LIBIPW_DEBUG_DROP
 812                            ("RX: netif_rx dropped the packet\n");
 813                        dev->stats.rx_dropped++;
 814                }
 815        }
 816
 817      rx_exit:
 818#ifdef NOT_YET
 819        if (sta)
 820                hostap_handle_sta_release(sta);
 821#endif
 822        return 1;
 823
 824      rx_dropped:
 825        dev->stats.rx_dropped++;
 826
 827        /* Returning 0 indicates to caller that we have not handled the SKB--
 828         * so it is still allocated and can be used again by underlying
 829         * hardware as a DMA target */
 830        return 0;
 831}
 832
 833/* Filter out unrelated packets, call libipw_rx[_mgt]
 834 * This function takes over the skb, it should not be used again after calling
 835 * this function. */
 836void libipw_rx_any(struct libipw_device *ieee,
 837                     struct sk_buff *skb, struct libipw_rx_stats *stats)
 838{
 839        struct libipw_hdr_4addr *hdr;
 840        int is_packet_for_us;
 841        u16 fc;
 842
 843        if (ieee->iw_mode == IW_MODE_MONITOR) {
 844                if (!libipw_rx(ieee, skb, stats))
 845                        dev_kfree_skb_irq(skb);
 846                return;
 847        }
 848
 849        if (skb->len < sizeof(struct ieee80211_hdr))
 850                goto drop_free;
 851
 852        hdr = (struct libipw_hdr_4addr *)skb->data;
 853        fc = le16_to_cpu(hdr->frame_ctl);
 854
 855        if ((fc & IEEE80211_FCTL_VERS) != 0)
 856                goto drop_free;
 857
 858        switch (fc & IEEE80211_FCTL_FTYPE) {
 859        case IEEE80211_FTYPE_MGMT:
 860                if (skb->len < sizeof(struct libipw_hdr_3addr))
 861                        goto drop_free;
 862                libipw_rx_mgt(ieee, hdr, stats);
 863                dev_kfree_skb_irq(skb);
 864                return;
 865        case IEEE80211_FTYPE_DATA:
 866                break;
 867        case IEEE80211_FTYPE_CTL:
 868                return;
 869        default:
 870                return;
 871        }
 872
 873        is_packet_for_us = 0;
 874        switch (ieee->iw_mode) {
 875        case IW_MODE_ADHOC:
 876                /* our BSS and not from/to DS */
 877                if (ether_addr_equal(hdr->addr3, ieee->bssid))
 878                if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == 0) {
 879                        /* promisc: get all */
 880                        if (ieee->dev->flags & IFF_PROMISC)
 881                                is_packet_for_us = 1;
 882                        /* to us */
 883                        else if (ether_addr_equal(hdr->addr1, ieee->dev->dev_addr))
 884                                is_packet_for_us = 1;
 885                        /* mcast */
 886                        else if (is_multicast_ether_addr(hdr->addr1))
 887                                is_packet_for_us = 1;
 888                }
 889                break;
 890        case IW_MODE_INFRA:
 891                /* our BSS (== from our AP) and from DS */
 892                if (ether_addr_equal(hdr->addr2, ieee->bssid))
 893                if ((fc & (IEEE80211_FCTL_TODS+IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS) {
 894                        /* promisc: get all */
 895                        if (ieee->dev->flags & IFF_PROMISC)
 896                                is_packet_for_us = 1;
 897                        /* to us */
 898                        else if (ether_addr_equal(hdr->addr1, ieee->dev->dev_addr))
 899                                is_packet_for_us = 1;
 900                        /* mcast */
 901                        else if (is_multicast_ether_addr(hdr->addr1)) {
 902                                /* not our own packet bcasted from AP */
 903                                if (!ether_addr_equal(hdr->addr3, ieee->dev->dev_addr))
 904                                        is_packet_for_us = 1;
 905                        }
 906                }
 907                break;
 908        default:
 909                /* ? */
 910                break;
 911        }
 912
 913        if (is_packet_for_us)
 914                if (!libipw_rx(ieee, skb, stats))
 915                        dev_kfree_skb_irq(skb);
 916        return;
 917
 918drop_free:
 919        dev_kfree_skb_irq(skb);
 920        ieee->dev->stats.rx_dropped++;
 921}
 922
 923#define MGMT_FRAME_FIXED_PART_LENGTH            0x24
 924
 925static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
 926
 927/*
 928* Make the structure we read from the beacon packet to have
 929* the right values
 930*/
 931static int libipw_verify_qos_info(struct libipw_qos_information_element
 932                                     *info_element, int sub_type)
 933{
 934
 935        if (info_element->qui_subtype != sub_type)
 936                return -1;
 937        if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
 938                return -1;
 939        if (info_element->qui_type != QOS_OUI_TYPE)
 940                return -1;
 941        if (info_element->version != QOS_VERSION_1)
 942                return -1;
 943
 944        return 0;
 945}
 946
 947/*
 948 * Parse a QoS parameter element
 949 */
 950static int libipw_read_qos_param_element(struct libipw_qos_parameter_info
 951                                            *element_param, struct libipw_info_element
 952                                            *info_element)
 953{
 954        int ret = 0;
 955        u16 size = sizeof(struct libipw_qos_parameter_info) - 2;
 956
 957        if ((info_element == NULL) || (element_param == NULL))
 958                return -1;
 959
 960        if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
 961                memcpy(element_param->info_element.qui, info_element->data,
 962                       info_element->len);
 963                element_param->info_element.elementID = info_element->id;
 964                element_param->info_element.length = info_element->len;
 965        } else
 966                ret = -1;
 967        if (ret == 0)
 968                ret = libipw_verify_qos_info(&element_param->info_element,
 969                                                QOS_OUI_PARAM_SUB_TYPE);
 970        return ret;
 971}
 972
 973/*
 974 * Parse a QoS information element
 975 */
 976static int libipw_read_qos_info_element(struct
 977                                           libipw_qos_information_element
 978                                           *element_info, struct libipw_info_element
 979                                           *info_element)
 980{
 981        int ret = 0;
 982        u16 size = sizeof(struct libipw_qos_information_element) - 2;
 983
 984        if (element_info == NULL)
 985                return -1;
 986        if (info_element == NULL)
 987                return -1;
 988
 989        if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
 990                memcpy(element_info->qui, info_element->data,
 991                       info_element->len);
 992                element_info->elementID = info_element->id;
 993                element_info->length = info_element->len;
 994        } else
 995                ret = -1;
 996
 997        if (ret == 0)
 998                ret = libipw_verify_qos_info(element_info,
 999                                                QOS_OUI_INFO_SUB_TYPE);
1000        return ret;
1001}
1002
1003/*
1004 * Write QoS parameters from the ac parameters.
1005 */
1006static int libipw_qos_convert_ac_to_parameters(struct
1007                                                  libipw_qos_parameter_info
1008                                                  *param_elm, struct
1009                                                  libipw_qos_parameters
1010                                                  *qos_param)
1011{
1012        int rc = 0;
1013        int i;
1014        struct libipw_qos_ac_parameter *ac_params;
1015        u32 txop;
1016        u8 cw_min;
1017        u8 cw_max;
1018
1019        for (i = 0; i < QOS_QUEUE_NUM; i++) {
1020                ac_params = &(param_elm->ac_params_record[i]);
1021
1022                qos_param->aifs[i] = (ac_params->aci_aifsn) & 0x0F;
1023                qos_param->aifs[i] -= (qos_param->aifs[i] < 2) ? 0 : 2;
1024
1025                cw_min = ac_params->ecw_min_max & 0x0F;
1026                qos_param->cw_min[i] = cpu_to_le16((1 << cw_min) - 1);
1027
1028                cw_max = (ac_params->ecw_min_max & 0xF0) >> 4;
1029                qos_param->cw_max[i] = cpu_to_le16((1 << cw_max) - 1);
1030
1031                qos_param->flag[i] =
1032                    (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1033
1034                txop = le16_to_cpu(ac_params->tx_op_limit) * 32;
1035                qos_param->tx_op_limit[i] = cpu_to_le16(txop);
1036        }
1037        return rc;
1038}
1039
1040/*
1041 * we have a generic data element which it may contain QoS information or
1042 * parameters element. check the information element length to decide
1043 * which type to read
1044 */
1045static int libipw_parse_qos_info_param_IE(struct libipw_info_element
1046                                             *info_element,
1047                                             struct libipw_network *network)
1048{
1049        int rc = 0;
1050        struct libipw_qos_parameters *qos_param = NULL;
1051        struct libipw_qos_information_element qos_info_element;
1052
1053        rc = libipw_read_qos_info_element(&qos_info_element, info_element);
1054
1055        if (rc == 0) {
1056                network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1057                network->flags |= NETWORK_HAS_QOS_INFORMATION;
1058        } else {
1059                struct libipw_qos_parameter_info param_element;
1060
1061                rc = libipw_read_qos_param_element(&param_element,
1062                                                      info_element);
1063                if (rc == 0) {
1064                        qos_param = &(network->qos_data.parameters);
1065                        libipw_qos_convert_ac_to_parameters(&param_element,
1066                                                               qos_param);
1067                        network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1068                        network->qos_data.param_count =
1069                            param_element.info_element.ac_info & 0x0F;
1070                }
1071        }
1072
1073        if (rc == 0) {
1074                LIBIPW_DEBUG_QOS("QoS is supported\n");
1075                network->qos_data.supported = 1;
1076        }
1077        return rc;
1078}
1079
1080#ifdef CONFIG_LIBIPW_DEBUG
1081#define MFIE_STRING(x) case WLAN_EID_ ##x: return #x
1082
1083static const char *get_info_element_string(u16 id)
1084{
1085        switch (id) {
1086                MFIE_STRING(SSID);
1087                MFIE_STRING(SUPP_RATES);
1088                MFIE_STRING(FH_PARAMS);
1089                MFIE_STRING(DS_PARAMS);
1090                MFIE_STRING(CF_PARAMS);
1091                MFIE_STRING(TIM);
1092                MFIE_STRING(IBSS_PARAMS);
1093                MFIE_STRING(COUNTRY);
1094                MFIE_STRING(REQUEST);
1095                MFIE_STRING(CHALLENGE);
1096                MFIE_STRING(PWR_CONSTRAINT);
1097                MFIE_STRING(PWR_CAPABILITY);
1098                MFIE_STRING(TPC_REQUEST);
1099                MFIE_STRING(TPC_REPORT);
1100                MFIE_STRING(SUPPORTED_CHANNELS);
1101                MFIE_STRING(CHANNEL_SWITCH);
1102                MFIE_STRING(MEASURE_REQUEST);
1103                MFIE_STRING(MEASURE_REPORT);
1104                MFIE_STRING(QUIET);
1105                MFIE_STRING(IBSS_DFS);
1106                MFIE_STRING(ERP_INFO);
1107                MFIE_STRING(RSN);
1108                MFIE_STRING(EXT_SUPP_RATES);
1109                MFIE_STRING(VENDOR_SPECIFIC);
1110                MFIE_STRING(QOS_PARAMETER);
1111        default:
1112                return "UNKNOWN";
1113        }
1114}
1115#endif
1116
1117static int libipw_parse_info_param(struct libipw_info_element
1118                                      *info_element, u16 length,
1119                                      struct libipw_network *network)
1120{
1121        u8 i;
1122#ifdef CONFIG_LIBIPW_DEBUG
1123        char rates_str[64];
1124        char *p;
1125#endif
1126
1127        while (length >= sizeof(*info_element)) {
1128                if (sizeof(*info_element) + info_element->len > length) {
1129                        LIBIPW_DEBUG_MGMT("Info elem: parse failed: "
1130                                             "info_element->len + 2 > left : "
1131                                             "info_element->len+2=%zd left=%d, id=%d.\n",
1132                                             info_element->len +
1133                                             sizeof(*info_element),
1134                                             length, info_element->id);
1135                        /* We stop processing but don't return an error here
1136                         * because some misbehaviour APs break this rule. ie.
1137                         * Orinoco AP1000. */
1138                        break;
1139                }
1140
1141                switch (info_element->id) {
1142                case WLAN_EID_SSID:
1143                        network->ssid_len = min(info_element->len,
1144                                                (u8) IW_ESSID_MAX_SIZE);
1145                        memcpy(network->ssid, info_element->data,
1146                               network->ssid_len);
1147                        if (network->ssid_len < IW_ESSID_MAX_SIZE)
1148                                memset(network->ssid + network->ssid_len, 0,
1149                                       IW_ESSID_MAX_SIZE - network->ssid_len);
1150
1151                        LIBIPW_DEBUG_MGMT("WLAN_EID_SSID: '%*pE' len=%d.\n",
1152                                          network->ssid_len, network->ssid,
1153                                          network->ssid_len);
1154                        break;
1155
1156                case WLAN_EID_SUPP_RATES:
1157#ifdef CONFIG_LIBIPW_DEBUG
1158                        p = rates_str;
1159#endif
1160                        network->rates_len = min(info_element->len,
1161                                                 MAX_RATES_LENGTH);
1162                        for (i = 0; i < network->rates_len; i++) {
1163                                network->rates[i] = info_element->data[i];
1164#ifdef CONFIG_LIBIPW_DEBUG
1165                                p += snprintf(p, sizeof(rates_str) -
1166                                              (p - rates_str), "%02X ",
1167                                              network->rates[i]);
1168#endif
1169                                if (libipw_is_ofdm_rate
1170                                    (info_element->data[i])) {
1171                                        network->flags |= NETWORK_HAS_OFDM;
1172                                        if (info_element->data[i] &
1173                                            LIBIPW_BASIC_RATE_MASK)
1174                                                network->flags &=
1175                                                    ~NETWORK_HAS_CCK;
1176                                }
1177                        }
1178
1179                        LIBIPW_DEBUG_MGMT("WLAN_EID_SUPP_RATES: '%s' (%d)\n",
1180                                             rates_str, network->rates_len);
1181                        break;
1182
1183                case WLAN_EID_EXT_SUPP_RATES:
1184#ifdef CONFIG_LIBIPW_DEBUG
1185                        p = rates_str;
1186#endif
1187                        network->rates_ex_len = min(info_element->len,
1188                                                    MAX_RATES_EX_LENGTH);
1189                        for (i = 0; i < network->rates_ex_len; i++) {
1190                                network->rates_ex[i] = info_element->data[i];
1191#ifdef CONFIG_LIBIPW_DEBUG
1192                                p += snprintf(p, sizeof(rates_str) -
1193                                              (p - rates_str), "%02X ",
1194                                              network->rates_ex[i]);
1195#endif
1196                                if (libipw_is_ofdm_rate
1197                                    (info_element->data[i])) {
1198                                        network->flags |= NETWORK_HAS_OFDM;
1199                                        if (info_element->data[i] &
1200                                            LIBIPW_BASIC_RATE_MASK)
1201                                                network->flags &=
1202                                                    ~NETWORK_HAS_CCK;
1203                                }
1204                        }
1205
1206                        LIBIPW_DEBUG_MGMT("WLAN_EID_EXT_SUPP_RATES: '%s' (%d)\n",
1207                                             rates_str, network->rates_ex_len);
1208                        break;
1209
1210                case WLAN_EID_DS_PARAMS:
1211                        LIBIPW_DEBUG_MGMT("WLAN_EID_DS_PARAMS: %d\n",
1212                                             info_element->data[0]);
1213                        network->channel = info_element->data[0];
1214                        break;
1215
1216                case WLAN_EID_FH_PARAMS:
1217                        LIBIPW_DEBUG_MGMT("WLAN_EID_FH_PARAMS: ignored\n");
1218                        break;
1219
1220                case WLAN_EID_CF_PARAMS:
1221                        LIBIPW_DEBUG_MGMT("WLAN_EID_CF_PARAMS: ignored\n");
1222                        break;
1223
1224                case WLAN_EID_TIM:
1225                        network->tim.tim_count = info_element->data[0];
1226                        network->tim.tim_period = info_element->data[1];
1227                        LIBIPW_DEBUG_MGMT("WLAN_EID_TIM: partially ignored\n");
1228                        break;
1229
1230                case WLAN_EID_ERP_INFO:
1231                        network->erp_value = info_element->data[0];
1232                        network->flags |= NETWORK_HAS_ERP_VALUE;
1233                        LIBIPW_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1234                                             network->erp_value);
1235                        break;
1236
1237                case WLAN_EID_IBSS_PARAMS:
1238                        network->atim_window = info_element->data[0];
1239                        LIBIPW_DEBUG_MGMT("WLAN_EID_IBSS_PARAMS: %d\n",
1240                                             network->atim_window);
1241                        break;
1242
1243                case WLAN_EID_CHALLENGE:
1244                        LIBIPW_DEBUG_MGMT("WLAN_EID_CHALLENGE: ignored\n");
1245                        break;
1246
1247                case WLAN_EID_VENDOR_SPECIFIC:
1248                        LIBIPW_DEBUG_MGMT("WLAN_EID_VENDOR_SPECIFIC: %d bytes\n",
1249                                             info_element->len);
1250                        if (!libipw_parse_qos_info_param_IE(info_element,
1251                                                               network))
1252                                break;
1253
1254                        if (info_element->len >= 4 &&
1255                            info_element->data[0] == 0x00 &&
1256                            info_element->data[1] == 0x50 &&
1257                            info_element->data[2] == 0xf2 &&
1258                            info_element->data[3] == 0x01) {
1259                                network->wpa_ie_len = min(info_element->len + 2,
1260                                                          MAX_WPA_IE_LEN);
1261                                memcpy(network->wpa_ie, info_element,
1262                                       network->wpa_ie_len);
1263                        }
1264                        break;
1265
1266                case WLAN_EID_RSN:
1267                        LIBIPW_DEBUG_MGMT("WLAN_EID_RSN: %d bytes\n",
1268                                             info_element->len);
1269                        network->rsn_ie_len = min(info_element->len + 2,
1270                                                  MAX_WPA_IE_LEN);
1271                        memcpy(network->rsn_ie, info_element,
1272                               network->rsn_ie_len);
1273                        break;
1274
1275                case WLAN_EID_QOS_PARAMETER:
1276                        printk(KERN_ERR
1277                               "QoS Error need to parse QOS_PARAMETER IE\n");
1278                        break;
1279                        /* 802.11h */
1280                case WLAN_EID_PWR_CONSTRAINT:
1281                        network->power_constraint = info_element->data[0];
1282                        network->flags |= NETWORK_HAS_POWER_CONSTRAINT;
1283                        break;
1284
1285                case WLAN_EID_CHANNEL_SWITCH:
1286                        network->power_constraint = info_element->data[0];
1287                        network->flags |= NETWORK_HAS_CSA;
1288                        break;
1289
1290                case WLAN_EID_QUIET:
1291                        network->quiet.count = info_element->data[0];
1292                        network->quiet.period = info_element->data[1];
1293                        network->quiet.duration = info_element->data[2];
1294                        network->quiet.offset = info_element->data[3];
1295                        network->flags |= NETWORK_HAS_QUIET;
1296                        break;
1297
1298                case WLAN_EID_IBSS_DFS:
1299                        network->flags |= NETWORK_HAS_IBSS_DFS;
1300                        break;
1301
1302                case WLAN_EID_TPC_REPORT:
1303                        network->tpc_report.transmit_power =
1304                            info_element->data[0];
1305                        network->tpc_report.link_margin = info_element->data[1];
1306                        network->flags |= NETWORK_HAS_TPC_REPORT;
1307                        break;
1308
1309                default:
1310                        LIBIPW_DEBUG_MGMT
1311                            ("Unsupported info element: %s (%d)\n",
1312                             get_info_element_string(info_element->id),
1313                             info_element->id);
1314                        break;
1315                }
1316
1317                length -= sizeof(*info_element) + info_element->len;
1318                info_element =
1319                    (struct libipw_info_element *)&info_element->
1320                    data[info_element->len];
1321        }
1322
1323        return 0;
1324}
1325
1326static int libipw_handle_assoc_resp(struct libipw_device *ieee, struct libipw_assoc_response
1327                                       *frame, struct libipw_rx_stats *stats)
1328{
1329        struct libipw_network network_resp = { };
1330        struct libipw_network *network = &network_resp;
1331        struct net_device *dev = ieee->dev;
1332
1333        network->flags = 0;
1334        network->qos_data.active = 0;
1335        network->qos_data.supported = 0;
1336        network->qos_data.param_count = 0;
1337        network->qos_data.old_param_count = 0;
1338
1339        //network->atim_window = le16_to_cpu(frame->aid) & (0x3FFF);
1340        network->atim_window = le16_to_cpu(frame->aid);
1341        network->listen_interval = le16_to_cpu(frame->status);
1342        memcpy(network->bssid, frame->header.addr3, ETH_ALEN);
1343        network->capability = le16_to_cpu(frame->capability);
1344        network->last_scanned = jiffies;
1345        network->rates_len = network->rates_ex_len = 0;
1346        network->last_associate = 0;
1347        network->ssid_len = 0;
1348        network->erp_value =
1349            (network->capability & WLAN_CAPABILITY_IBSS) ? 0x3 : 0x0;
1350
1351        if (stats->freq == LIBIPW_52GHZ_BAND) {
1352                /* for A band (No DS info) */
1353                network->channel = stats->received_channel;
1354        } else
1355                network->flags |= NETWORK_HAS_CCK;
1356
1357        network->wpa_ie_len = 0;
1358        network->rsn_ie_len = 0;
1359
1360        if (libipw_parse_info_param
1361            (frame->info_element, stats->len - sizeof(*frame), network))
1362                return 1;
1363
1364        network->mode = 0;
1365        if (stats->freq == LIBIPW_52GHZ_BAND)
1366                network->mode = IEEE_A;
1367        else {
1368                if (network->flags & NETWORK_HAS_OFDM)
1369                        network->mode |= IEEE_G;
1370                if (network->flags & NETWORK_HAS_CCK)
1371                        network->mode |= IEEE_B;
1372        }
1373
1374        memcpy(&network->stats, stats, sizeof(network->stats));
1375
1376        if (ieee->handle_assoc_response != NULL)
1377                ieee->handle_assoc_response(dev, frame, network);
1378
1379        return 0;
1380}
1381
1382/***************************************************/
1383
1384static int libipw_network_init(struct libipw_device *ieee, struct libipw_probe_response
1385                                         *beacon,
1386                                         struct libipw_network *network,
1387                                         struct libipw_rx_stats *stats)
1388{
1389        network->qos_data.active = 0;
1390        network->qos_data.supported = 0;
1391        network->qos_data.param_count = 0;
1392        network->qos_data.old_param_count = 0;
1393
1394        /* Pull out fixed field data */
1395        memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
1396        network->capability = le16_to_cpu(beacon->capability);
1397        network->last_scanned = jiffies;
1398        network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
1399        network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
1400        network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
1401        /* Where to pull this? beacon->listen_interval; */
1402        network->listen_interval = 0x0A;
1403        network->rates_len = network->rates_ex_len = 0;
1404        network->last_associate = 0;
1405        network->ssid_len = 0;
1406        network->flags = 0;
1407        network->atim_window = 0;
1408        network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
1409            0x3 : 0x0;
1410
1411        if (stats->freq == LIBIPW_52GHZ_BAND) {
1412                /* for A band (No DS info) */
1413                network->channel = stats->received_channel;
1414        } else
1415                network->flags |= NETWORK_HAS_CCK;
1416
1417        network->wpa_ie_len = 0;
1418        network->rsn_ie_len = 0;
1419
1420        if (libipw_parse_info_param
1421            (beacon->info_element, stats->len - sizeof(*beacon), network))
1422                return 1;
1423
1424        network->mode = 0;
1425        if (stats->freq == LIBIPW_52GHZ_BAND)
1426                network->mode = IEEE_A;
1427        else {
1428                if (network->flags & NETWORK_HAS_OFDM)
1429                        network->mode |= IEEE_G;
1430                if (network->flags & NETWORK_HAS_CCK)
1431                        network->mode |= IEEE_B;
1432        }
1433
1434        if (network->mode == 0) {
1435                LIBIPW_DEBUG_SCAN("Filtered out '%*pE (%pM)' network.\n",
1436                                  network->ssid_len, network->ssid,
1437                                  network->bssid);
1438                return 1;
1439        }
1440
1441        memcpy(&network->stats, stats, sizeof(network->stats));
1442
1443        return 0;
1444}
1445
1446static inline int is_same_network(struct libipw_network *src,
1447                                  struct libipw_network *dst)
1448{
1449        /* A network is only a duplicate if the channel, BSSID, and ESSID
1450         * all match.  We treat all <hidden> with the same BSSID and channel
1451         * as one network */
1452        return ((src->ssid_len == dst->ssid_len) &&
1453                (src->channel == dst->channel) &&
1454                ether_addr_equal_64bits(src->bssid, dst->bssid) &&
1455                !memcmp(src->ssid, dst->ssid, src->ssid_len));
1456}
1457
1458static void update_network(struct libipw_network *dst,
1459                                  struct libipw_network *src)
1460{
1461        int qos_active;
1462        u8 old_param;
1463
1464        /* We only update the statistics if they were created by receiving
1465         * the network information on the actual channel the network is on.
1466         *
1467         * This keeps beacons received on neighbor channels from bringing
1468         * down the signal level of an AP. */
1469        if (dst->channel == src->stats.received_channel)
1470                memcpy(&dst->stats, &src->stats,
1471                       sizeof(struct libipw_rx_stats));
1472        else
1473                LIBIPW_DEBUG_SCAN("Network %pM info received "
1474                        "off channel (%d vs. %d)\n", src->bssid,
1475                        dst->channel, src->stats.received_channel);
1476
1477        dst->capability = src->capability;
1478        memcpy(dst->rates, src->rates, src->rates_len);
1479        dst->rates_len = src->rates_len;
1480        memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
1481        dst->rates_ex_len = src->rates_ex_len;
1482
1483        dst->mode = src->mode;
1484        dst->flags = src->flags;
1485        dst->time_stamp[0] = src->time_stamp[0];
1486        dst->time_stamp[1] = src->time_stamp[1];
1487
1488        dst->beacon_interval = src->beacon_interval;
1489        dst->listen_interval = src->listen_interval;
1490        dst->atim_window = src->atim_window;
1491        dst->erp_value = src->erp_value;
1492        dst->tim = src->tim;
1493
1494        memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
1495        dst->wpa_ie_len = src->wpa_ie_len;
1496        memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
1497        dst->rsn_ie_len = src->rsn_ie_len;
1498
1499        dst->last_scanned = jiffies;
1500        qos_active = src->qos_data.active;
1501        old_param = dst->qos_data.old_param_count;
1502        if (dst->flags & NETWORK_HAS_QOS_MASK)
1503                memcpy(&dst->qos_data, &src->qos_data,
1504                       sizeof(struct libipw_qos_data));
1505        else {
1506                dst->qos_data.supported = src->qos_data.supported;
1507                dst->qos_data.param_count = src->qos_data.param_count;
1508        }
1509
1510        if (dst->qos_data.supported == 1) {
1511                if (dst->ssid_len)
1512                        LIBIPW_DEBUG_QOS
1513                            ("QoS the network %s is QoS supported\n",
1514                             dst->ssid);
1515                else
1516                        LIBIPW_DEBUG_QOS
1517                            ("QoS the network is QoS supported\n");
1518        }
1519        dst->qos_data.active = qos_active;
1520        dst->qos_data.old_param_count = old_param;
1521
1522        /* dst->last_associate is not overwritten */
1523}
1524
1525static inline int is_beacon(__le16 fc)
1526{
1527        return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON);
1528}
1529
1530static void libipw_process_probe_response(struct libipw_device
1531                                                    *ieee, struct
1532                                                    libipw_probe_response
1533                                                    *beacon, struct libipw_rx_stats
1534                                                    *stats)
1535{
1536        struct net_device *dev = ieee->dev;
1537        struct libipw_network network = { };
1538        struct libipw_network *target;
1539        struct libipw_network *oldest = NULL;
1540#ifdef CONFIG_LIBIPW_DEBUG
1541        struct libipw_info_element *info_element = beacon->info_element;
1542#endif
1543        unsigned long flags;
1544
1545        LIBIPW_DEBUG_SCAN("'%*pE' (%pM): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
1546                     info_element->len, info_element->data,
1547                     beacon->header.addr3,
1548                     (beacon->capability & cpu_to_le16(1 << 0xf)) ? '1' : '0',
1549                     (beacon->capability & cpu_to_le16(1 << 0xe)) ? '1' : '0',
1550                     (beacon->capability & cpu_to_le16(1 << 0xd)) ? '1' : '0',
1551                     (beacon->capability & cpu_to_le16(1 << 0xc)) ? '1' : '0',
1552                     (beacon->capability & cpu_to_le16(1 << 0xb)) ? '1' : '0',
1553                     (beacon->capability & cpu_to_le16(1 << 0xa)) ? '1' : '0',
1554                     (beacon->capability & cpu_to_le16(1 << 0x9)) ? '1' : '0',
1555                     (beacon->capability & cpu_to_le16(1 << 0x8)) ? '1' : '0',
1556                     (beacon->capability & cpu_to_le16(1 << 0x7)) ? '1' : '0',
1557                     (beacon->capability & cpu_to_le16(1 << 0x6)) ? '1' : '0',
1558                     (beacon->capability & cpu_to_le16(1 << 0x5)) ? '1' : '0',
1559                     (beacon->capability & cpu_to_le16(1 << 0x4)) ? '1' : '0',
1560                     (beacon->capability & cpu_to_le16(1 << 0x3)) ? '1' : '0',
1561                     (beacon->capability & cpu_to_le16(1 << 0x2)) ? '1' : '0',
1562                     (beacon->capability & cpu_to_le16(1 << 0x1)) ? '1' : '0',
1563                     (beacon->capability & cpu_to_le16(1 << 0x0)) ? '1' : '0');
1564
1565        if (libipw_network_init(ieee, beacon, &network, stats)) {
1566                LIBIPW_DEBUG_SCAN("Dropped '%*pE' (%pM) via %s.\n",
1567                                  info_element->len, info_element->data,
1568                                  beacon->header.addr3,
1569                                  is_beacon(beacon->header.frame_ctl) ?
1570                                  "BEACON" : "PROBE RESPONSE");
1571                return;
1572        }
1573
1574        /* The network parsed correctly -- so now we scan our known networks
1575         * to see if we can find it in our list.
1576         *
1577         * NOTE:  This search is definitely not optimized.  Once its doing
1578         *        the "right thing" we'll optimize it for efficiency if
1579         *        necessary */
1580
1581        /* Search for this entry in the list and update it if it is
1582         * already there. */
1583
1584        spin_lock_irqsave(&ieee->lock, flags);
1585
1586        list_for_each_entry(target, &ieee->network_list, list) {
1587                if (is_same_network(target, &network))
1588                        break;
1589
1590                if ((oldest == NULL) ||
1591                    time_before(target->last_scanned, oldest->last_scanned))
1592                        oldest = target;
1593        }
1594
1595        /* If we didn't find a match, then get a new network slot to initialize
1596         * with this beacon's information */
1597        if (&target->list == &ieee->network_list) {
1598                if (list_empty(&ieee->network_free_list)) {
1599                        /* If there are no more slots, expire the oldest */
1600                        list_del(&oldest->list);
1601                        target = oldest;
1602                        LIBIPW_DEBUG_SCAN("Expired '%*pE' (%pM) from network list.\n",
1603                                          target->ssid_len, target->ssid,
1604                                          target->bssid);
1605                } else {
1606                        /* Otherwise just pull from the free list */
1607                        target = list_entry(ieee->network_free_list.next,
1608                                            struct libipw_network, list);
1609                        list_del(ieee->network_free_list.next);
1610                }
1611
1612#ifdef CONFIG_LIBIPW_DEBUG
1613                LIBIPW_DEBUG_SCAN("Adding '%*pE' (%pM) via %s.\n",
1614                                  network.ssid_len, network.ssid,
1615                                  network.bssid,
1616                                  is_beacon(beacon->header.frame_ctl) ?
1617                                  "BEACON" : "PROBE RESPONSE");
1618#endif
1619                memcpy(target, &network, sizeof(*target));
1620                list_add_tail(&target->list, &ieee->network_list);
1621        } else {
1622                LIBIPW_DEBUG_SCAN("Updating '%*pE' (%pM) via %s.\n",
1623                                  target->ssid_len, target->ssid,
1624                                  target->bssid,
1625                                  is_beacon(beacon->header.frame_ctl) ?
1626                                  "BEACON" : "PROBE RESPONSE");
1627                update_network(target, &network);
1628        }
1629
1630        spin_unlock_irqrestore(&ieee->lock, flags);
1631
1632        if (is_beacon(beacon->header.frame_ctl)) {
1633                if (ieee->handle_beacon != NULL)
1634                        ieee->handle_beacon(dev, beacon, target);
1635        } else {
1636                if (ieee->handle_probe_response != NULL)
1637                        ieee->handle_probe_response(dev, beacon, target);
1638        }
1639}
1640
1641void libipw_rx_mgt(struct libipw_device *ieee,
1642                      struct libipw_hdr_4addr *header,
1643                      struct libipw_rx_stats *stats)
1644{
1645        switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
1646        case IEEE80211_STYPE_ASSOC_RESP:
1647                LIBIPW_DEBUG_MGMT("received ASSOCIATION RESPONSE (%d)\n",
1648                                     WLAN_FC_GET_STYPE(le16_to_cpu
1649                                                       (header->frame_ctl)));
1650                libipw_handle_assoc_resp(ieee,
1651                                            (struct libipw_assoc_response *)
1652                                            header, stats);
1653                break;
1654
1655        case IEEE80211_STYPE_REASSOC_RESP:
1656                LIBIPW_DEBUG_MGMT("received REASSOCIATION RESPONSE (%d)\n",
1657                                     WLAN_FC_GET_STYPE(le16_to_cpu
1658                                                       (header->frame_ctl)));
1659                break;
1660
1661        case IEEE80211_STYPE_PROBE_REQ:
1662                LIBIPW_DEBUG_MGMT("received auth (%d)\n",
1663                                     WLAN_FC_GET_STYPE(le16_to_cpu
1664                                                       (header->frame_ctl)));
1665
1666                if (ieee->handle_probe_request != NULL)
1667                        ieee->handle_probe_request(ieee->dev,
1668                                                   (struct
1669                                                    libipw_probe_request *)
1670                                                   header, stats);
1671                break;
1672
1673        case IEEE80211_STYPE_PROBE_RESP:
1674                LIBIPW_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
1675                                     WLAN_FC_GET_STYPE(le16_to_cpu
1676                                                       (header->frame_ctl)));
1677                LIBIPW_DEBUG_SCAN("Probe response\n");
1678                libipw_process_probe_response(ieee,
1679                                                 (struct
1680                                                  libipw_probe_response *)
1681                                                 header, stats);
1682                break;
1683
1684        case IEEE80211_STYPE_BEACON:
1685                LIBIPW_DEBUG_MGMT("received BEACON (%d)\n",
1686                                     WLAN_FC_GET_STYPE(le16_to_cpu
1687                                                       (header->frame_ctl)));
1688                LIBIPW_DEBUG_SCAN("Beacon\n");
1689                libipw_process_probe_response(ieee,
1690                                                 (struct
1691                                                  libipw_probe_response *)
1692                                                 header, stats);
1693                break;
1694        case IEEE80211_STYPE_AUTH:
1695
1696                LIBIPW_DEBUG_MGMT("received auth (%d)\n",
1697                                     WLAN_FC_GET_STYPE(le16_to_cpu
1698                                                       (header->frame_ctl)));
1699
1700                if (ieee->handle_auth != NULL)
1701                        ieee->handle_auth(ieee->dev,
1702                                          (struct libipw_auth *)header);
1703                break;
1704
1705        case IEEE80211_STYPE_DISASSOC:
1706                if (ieee->handle_disassoc != NULL)
1707                        ieee->handle_disassoc(ieee->dev,
1708                                              (struct libipw_disassoc *)
1709                                              header);
1710                break;
1711
1712        case IEEE80211_STYPE_ACTION:
1713                LIBIPW_DEBUG_MGMT("ACTION\n");
1714                if (ieee->handle_action)
1715                        ieee->handle_action(ieee->dev,
1716                                            (struct libipw_action *)
1717                                            header, stats);
1718                break;
1719
1720        case IEEE80211_STYPE_REASSOC_REQ:
1721                LIBIPW_DEBUG_MGMT("received reassoc (%d)\n",
1722                                     WLAN_FC_GET_STYPE(le16_to_cpu
1723                                                       (header->frame_ctl)));
1724
1725                LIBIPW_DEBUG_MGMT("%s: LIBIPW_REASSOC_REQ received\n",
1726                                     ieee->dev->name);
1727                if (ieee->handle_reassoc_request != NULL)
1728                        ieee->handle_reassoc_request(ieee->dev,
1729                                                    (struct libipw_reassoc_request *)
1730                                                     header);
1731                break;
1732
1733        case IEEE80211_STYPE_ASSOC_REQ:
1734                LIBIPW_DEBUG_MGMT("received assoc (%d)\n",
1735                                     WLAN_FC_GET_STYPE(le16_to_cpu
1736                                                       (header->frame_ctl)));
1737
1738                LIBIPW_DEBUG_MGMT("%s: LIBIPW_ASSOC_REQ received\n",
1739                                     ieee->dev->name);
1740                if (ieee->handle_assoc_request != NULL)
1741                        ieee->handle_assoc_request(ieee->dev);
1742                break;
1743
1744        case IEEE80211_STYPE_DEAUTH:
1745                LIBIPW_DEBUG_MGMT("DEAUTH\n");
1746                if (ieee->handle_deauth != NULL)
1747                        ieee->handle_deauth(ieee->dev,
1748                                            (struct libipw_deauth *)
1749                                            header);
1750                break;
1751        default:
1752                LIBIPW_DEBUG_MGMT("received UNKNOWN (%d)\n",
1753                                     WLAN_FC_GET_STYPE(le16_to_cpu
1754                                                       (header->frame_ctl)));
1755                LIBIPW_DEBUG_MGMT("%s: Unknown management packet: %d\n",
1756                                     ieee->dev->name,
1757                                     WLAN_FC_GET_STYPE(le16_to_cpu
1758                                                       (header->frame_ctl)));
1759                break;
1760        }
1761}
1762
1763EXPORT_SYMBOL_GPL(libipw_rx_any);
1764EXPORT_SYMBOL(libipw_rx_mgt);
1765EXPORT_SYMBOL(libipw_rx);
1766