drivers/staging/rtl8192e/rtllib_rx.c

   1 /*
   2  * Original code based Host AP (software wireless LAN access point) driver
   3  * for Intersil Prism2/2.5/3 - hostap.o module, common routines
   4  *
   5  * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
   6  * <jkmaline@cc.hut.fi>
   7  * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
   8  * Copyright (c) 2004, 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   Few modifications for Realtek's Wi-Fi drivers by
  17   Andrea Merello <andreamrl@tiscali.it>
  18
  19   A special thanks goes to Realtek for their support !
  20
  21 ******************************************************************************/
  22
  23
  24 #include <linux/compiler.h>
  25 #include <linux/errno.h>
  26 #include <linux/if_arp.h>
  27 #include <linux/in6.h>
  28 #include <linux/in.h>
  29 #include <linux/ip.h>
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/netdevice.h>
  33 #include <linux/pci.h>
  34 #include <linux/proc_fs.h>
  35 #include <linux/skbuff.h>
  36 #include <linux/slab.h>
  37 #include <linux/tcp.h>
  38 #include <linux/types.h>
  39 #include <linux/wireless.h>
  40 #include <linux/etherdevice.h>
  41 #include <linux/uaccess.h>
  42 #include <linux/ctype.h>
  43
  44 #include "rtllib.h"
  45 #include "dot11d.h"
  46
  47 static inline void rtllib_monitor_rx(struct rtllib_device *ieee,
  48                                 struct sk_buff *skb, struct rtllib_rx_stats *rx_status,
  49                                 size_t hdr_length)
  50 {
  51         skb->dev = ieee->dev;
  52         skb_reset_mac_header(skb);
  53         skb_pull(skb, hdr_length);
  54         skb->pkt_type = PACKET_OTHERHOST;
  55         skb->protocol = __constant_htons(ETH_P_80211_RAW);
  56         memset(skb->cb, 0, sizeof(skb->cb));
  57         netif_rx(skb);
  58 }
  59
  60 /* Called only as a tasklet (software IRQ) */
  61 static struct rtllib_frag_entry *
  62 rtllib_frag_cache_find(struct rtllib_device *ieee, unsigned int seq,
  63                           unsigned int frag, u8 tid, u8 *src, u8 *dst)
  64 {
  65         struct rtllib_frag_entry *entry;
  66         int i;
  67
  68         for (i = 0; i < RTLLIB_FRAG_CACHE_LEN; i++) {
  69                 entry = &ieee->frag_cache[tid][i];
  70                 if (entry->skb != NULL &&
  71                     time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
  72                         RTLLIB_DEBUG_FRAG(
  73                                 "expiring fragment cache entry "
  74                                 "seq=%u last_frag=%u\n",
  75                                 entry->seq, entry->last_frag);
  76                         dev_kfree_skb_any(entry->skb);
  77                         entry->skb = NULL;
  78                 }
  79
  80                 if (entry->skb != NULL && entry->seq == seq &&
  81                     (entry->last_frag + 1 == frag || frag == -1) &&
  82                     memcmp(entry->src_addr, src, ETH_ALEN) == 0 &&
  83                     memcmp(entry->dst_addr, dst, ETH_ALEN) == 0)
  84                         return entry;
  85         }
  86
  87         return NULL;
  88 }
  89
  90 /* Called only as a tasklet (software IRQ) */
  91 static struct sk_buff *
  92 rtllib_frag_cache_get(struct rtllib_device *ieee,
  93                          struct rtllib_hdr_4addr *hdr)
  94 {
  95         struct sk_buff *skb = NULL;
  96         u16 fc = le16_to_cpu(hdr->frame_ctl);
  97         u16 sc = le16_to_cpu(hdr->seq_ctl);
  98         unsigned int frag = WLAN_GET_SEQ_FRAG(sc);
  99         unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
 100         struct rtllib_frag_entry *entry;
 101         struct rtllib_hdr_3addrqos *hdr_3addrqos;
 102         struct rtllib_hdr_4addrqos *hdr_4addrqos;
 103         u8 tid;
 104
 105         if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) && RTLLIB_QOS_HAS_SEQ(fc)) {
 106                 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)hdr;
 107                 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 108                 tid = UP2AC(tid);
 109                 tid++;
 110         } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
 111                 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)hdr;
 112                 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 113                 tid = UP2AC(tid);
 114                 tid++;
 115         } else {
 116                 tid = 0;
 117         }
 118
 119         if (frag == 0) {
 120                 /* Reserve enough space to fit maximum frame length */
 121                 skb = dev_alloc_skb(ieee->dev->mtu +
 122                                     sizeof(struct rtllib_hdr_4addr) +
 123                                     8 /* LLC */ +
 124                                     2 /* alignment */ +
 125                                     8 /* WEP */ +
 126                                     ETH_ALEN /* WDS */ +
 127                                     (RTLLIB_QOS_HAS_SEQ(fc) ? 2 : 0) /* QOS Control */);
 128                 if (skb == NULL)
 129                         return NULL;
 130
 131                 entry = &ieee->frag_cache[tid][ieee->frag_next_idx[tid]];
 132                 ieee->frag_next_idx[tid]++;
 133                 if (ieee->frag_next_idx[tid] >= RTLLIB_FRAG_CACHE_LEN)
 134                         ieee->frag_next_idx[tid] = 0;
 135
 136                 if (entry->skb != NULL)
 137                         dev_kfree_skb_any(entry->skb);
 138
 139                 entry->first_frag_time = jiffies;
 140                 entry->seq = seq;
 141                 entry->last_frag = frag;
 142                 entry->skb = skb;
 143                 memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
 144                 memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
 145         } else {
 146                 /* received a fragment of a frame for which the head fragment
 147                  * should have already been received */
 148                 entry = rtllib_frag_cache_find(ieee, seq, frag, tid, hdr->addr2,
 149                                                   hdr->addr1);
 150                 if (entry != NULL) {
 151                         entry->last_frag = frag;
 152                         skb = entry->skb;
 153                 }
 154         }
 155
 156         return skb;
 157 }
 158
 159
 160 /* Called only as a tasklet (software IRQ) */
 161 static int rtllib_frag_cache_invalidate(struct rtllib_device *ieee,
 162                                            struct rtllib_hdr_4addr *hdr)
 163 {
 164         u16 fc = le16_to_cpu(hdr->frame_ctl);
 165         u16 sc = le16_to_cpu(hdr->seq_ctl);
 166         unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
 167         struct rtllib_frag_entry *entry;
 168         struct rtllib_hdr_3addrqos *hdr_3addrqos;
 169         struct rtllib_hdr_4addrqos *hdr_4addrqos;
 170         u8 tid;
 171
 172         if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) && RTLLIB_QOS_HAS_SEQ(fc)) {
 173                 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)hdr;
 174                 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 175                 tid = UP2AC(tid);
 176                 tid++;
 177         } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
 178                 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)hdr;
 179                 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 180                 tid = UP2AC(tid);
 181                 tid++;
 182         } else {
 183                 tid = 0;
 184         }
 185
 186         entry = rtllib_frag_cache_find(ieee, seq, -1, tid, hdr->addr2,
 187                                           hdr->addr1);
 188
 189         if (entry == NULL) {
 190                 RTLLIB_DEBUG_FRAG(
 191                         "could not invalidate fragment cache "
 192                         "entry (seq=%u)\n", seq);
 193                 return -1;
 194         }
 195
 196         entry->skb = NULL;
 197         return 0;
 198 }
 199
 200 /* rtllib_rx_frame_mgtmt
 201  *
 202  * Responsible for handling management control frames
 203  *
 204  * Called by rtllib_rx */
 205 static inline int
 206 rtllib_rx_frame_mgmt(struct rtllib_device *ieee, struct sk_buff *skb,
 207                         struct rtllib_rx_stats *rx_stats, u16 type,
 208                         u16 stype)
 209 {
 210         /* On the struct stats definition there is written that
 211          * this is not mandatory.... but seems that the probe
 212          * response parser uses it
 213          */
 214         struct rtllib_hdr_3addr * hdr = (struct rtllib_hdr_3addr *)skb->data;
 215
 216         rx_stats->len = skb->len;
 217         rtllib_rx_mgt(ieee, skb, rx_stats);
 218         if ((memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN))) {
 219                 dev_kfree_skb_any(skb);
 220                 return 0;
 221         }
 222         rtllib_rx_frame_softmac(ieee, skb, rx_stats, type, stype);
 223
 224         dev_kfree_skb_any(skb);
 225
 226         return 0;
 227 }
 228
 229 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
 230 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
 231 static unsigned char rfc1042_header[] = {
 232         0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00
 233 };
 234 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
 235 static unsigned char bridge_tunnel_header[] = {
 236         0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8
 237 };
 238 /* No encapsulation header if EtherType < 0x600 (=length) */
 239
 240 /* Called by rtllib_rx_frame_decrypt */
 241 static int rtllib_is_eapol_frame(struct rtllib_device *ieee,
 242                                     struct sk_buff *skb, size_t hdrlen)
 243 {
 244         struct net_device *dev = ieee->dev;
 245         u16 fc, ethertype;
 246         struct rtllib_hdr_4addr *hdr;
 247         u8 *pos;
 248
 249         if (skb->len < 24)
 250                 return 0;
 251
 252         hdr = (struct rtllib_hdr_4addr *) skb->data;
 253         fc = le16_to_cpu(hdr->frame_ctl);
 254
 255         /* check that the frame is unicast frame to us */
 256         if ((fc & (RTLLIB_FCTL_TODS | RTLLIB_FCTL_FROMDS)) ==
 257             RTLLIB_FCTL_TODS &&
 258             memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 &&
 259             memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
 260                 /* ToDS frame with own addr BSSID and DA */
 261         } else if ((fc & (RTLLIB_FCTL_TODS | RTLLIB_FCTL_FROMDS)) ==
 262                    RTLLIB_FCTL_FROMDS &&
 263                    memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
 264                 /* FromDS frame with own addr as DA */
 265         } else
 266                 return 0;
 267
 268         if (skb->len < 24 + 8)
 269                 return 0;
 270
 271         /* check for port access entity Ethernet type */
 272         pos = skb->data + hdrlen;
 273         ethertype = (pos[6] << 8) | pos[7];
 274         if (ethertype == ETH_P_PAE)
 275                 return 1;
 276
 277         return 0;
 278 }
 279
 280 /* Called only as a tasklet (software IRQ), by rtllib_rx */
 281 static inline int
 282 rtllib_rx_frame_decrypt(struct rtllib_device *ieee, struct sk_buff *skb,
 283                         struct lib80211_crypt_data *crypt)
 284 {
 285         struct rtllib_hdr_4addr *hdr;
 286         int res, hdrlen;
 287
 288         if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
 289                 return 0;
 290
 291         if (ieee->hwsec_active) {
 292                 struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
 293                 tcb_desc->bHwSec = 1;
 294
 295                 if (ieee->need_sw_enc)
 296                         tcb_desc->bHwSec = 0;
 297         }
 298
 299         hdr = (struct rtllib_hdr_4addr *) skb->data;
 300         hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 301
 302         atomic_inc(&crypt->refcnt);
 303         res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
 304         atomic_dec(&crypt->refcnt);
 305         if (res < 0) {
 306                 RTLLIB_DEBUG_DROP(
 307                         "decryption failed (SA= %pM"
 308                         ") res=%d\n", hdr->addr2, res);
 309                 if (res == -2)
 310                         RTLLIB_DEBUG_DROP("Decryption failed ICV "
 311                                              "mismatch (key %d)\n",
 312                                              skb->data[hdrlen + 3] >> 6);
 313                 ieee->ieee_stats.rx_discards_undecryptable++;
 314                 return -1;
 315         }
 316
 317         return res;
 318 }
 319
 320
 321 /* Called only as a tasklet (software IRQ), by rtllib_rx */
 322 static inline int
 323 rtllib_rx_frame_decrypt_msdu(struct rtllib_device *ieee, struct sk_buff *skb,
 324                              int keyidx, struct lib80211_crypt_data *crypt)
 325 {
 326         struct rtllib_hdr_4addr *hdr;
 327         int res, hdrlen;
 328
 329         if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
 330                 return 0;
 331         if (ieee->hwsec_active) {
 332                 struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
 333                 tcb_desc->bHwSec = 1;
 334
 335                 if (ieee->need_sw_enc)
 336                         tcb_desc->bHwSec = 0;
 337         }
 338
 339         hdr = (struct rtllib_hdr_4addr *) skb->data;
 340         hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 341
 342         atomic_inc(&crypt->refcnt);
 343         res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
 344         atomic_dec(&crypt->refcnt);
 345         if (res < 0) {
 346                 printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
 347                        " (SA= %pM keyidx=%d)\n",
 348                        ieee->dev->name, hdr->addr2, keyidx);
 349                 return -1;
 350         }
 351
 352         return 0;
 353 }
 354
 355
 356 /* this function is stolen from ipw2200 driver*/
 357 #define IEEE_PACKET_RETRY_TIME (5*HZ)
 358 static int is_duplicate_packet(struct rtllib_device *ieee,
 359                                       struct rtllib_hdr_4addr *header)
 360 {
 361         u16 fc = le16_to_cpu(header->frame_ctl);
 362         u16 sc = le16_to_cpu(header->seq_ctl);
 363         u16 seq = WLAN_GET_SEQ_SEQ(sc);
 364         u16 frag = WLAN_GET_SEQ_FRAG(sc);
 365         u16 *last_seq, *last_frag;
 366         unsigned long *last_time;
 367         struct rtllib_hdr_3addrqos *hdr_3addrqos;
 368         struct rtllib_hdr_4addrqos *hdr_4addrqos;
 369         u8 tid;
 370
 371         if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) && RTLLIB_QOS_HAS_SEQ(fc)) {
 372                 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)header;
 373                 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 374                 tid = UP2AC(tid);
 375                 tid++;
 376         } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
 377                 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)header;
 378                 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 379                 tid = UP2AC(tid);
 380                 tid++;
 381         } else {
 382                 tid = 0;
 383         }
 384
 385         switch (ieee->iw_mode) {
 386         case IW_MODE_ADHOC:
 387         {
 388                 struct list_head *p;
 389                 struct ieee_ibss_seq *entry = NULL;
 390                 u8 *mac = header->addr2;
 391                 int index = mac[5] % IEEE_IBSS_MAC_HASH_SIZE;
 392                 list_for_each(p, &ieee->ibss_mac_hash[index]) {
 393                         entry = list_entry(p, struct ieee_ibss_seq, list);
 394                         if (!memcmp(entry->mac, mac, ETH_ALEN))
 395                                 break;
 396                 }
 397                 if (p == &ieee->ibss_mac_hash[index]) {
 398                         entry = kmalloc(sizeof(struct ieee_ibss_seq), GFP_ATOMIC);
 399                         if (!entry) {
 400                                 printk(KERN_WARNING "Cannot malloc new mac entry\n");
 401                                 return 0;
 402                         }
 403                         memcpy(entry->mac, mac, ETH_ALEN);
 404                         entry->seq_num[tid] = seq;
 405                         entry->frag_num[tid] = frag;
 406                         entry->packet_time[tid] = jiffies;
 407                         list_add(&entry->list, &ieee->ibss_mac_hash[index]);
 408                         return 0;
 409                 }
 410                 last_seq = &entry->seq_num[tid];
 411                 last_frag = &entry->frag_num[tid];
 412                 last_time = &entry->packet_time[tid];
 413                 break;
 414         }
 415
 416         case IW_MODE_INFRA:
 417                 last_seq = &ieee->last_rxseq_num[tid];
 418                 last_frag = &ieee->last_rxfrag_num[tid];
 419                 last_time = &ieee->last_packet_time[tid];
 420                 break;
 421         default:
 422                 return 0;
 423         }
 424
 425         if ((*last_seq == seq) &&
 426             time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) {
 427                 if (*last_frag == frag)
 428                         goto drop;
 429                 if (*last_frag + 1 != frag)
 430                         /* out-of-order fragment */
 431                         goto drop;
 432         } else
 433                 *last_seq = seq;
 434
 435         *last_frag = frag;
 436         *last_time = jiffies;
 437         return 0;
 438
 439 drop:
 440
 441         return 1;
 442 }
 443
 444 static bool AddReorderEntry(struct rx_ts_record *pTS,
 445                             struct rx_reorder_entry *pReorderEntry)
 446 {
 447         struct list_head *pList = &pTS->RxPendingPktList;
 448
 449         while (pList->next != &pTS->RxPendingPktList) {
 450                 if (SN_LESS(pReorderEntry->SeqNum, ((struct rx_reorder_entry *)
 451                     list_entry(pList->next, struct rx_reorder_entry,
 452                     List))->SeqNum))
 453                         pList = pList->next;
 454                 else if (SN_EQUAL(pReorderEntry->SeqNum,
 455                         ((struct rx_reorder_entry *)list_entry(pList->next,
 456                         struct rx_reorder_entry, List))->SeqNum))
 457                                 return false;
 458                 else
 459                         break;
 460         }
 461         pReorderEntry->List.next = pList->next;
 462         pReorderEntry->List.next->prev = &pReorderEntry->List;
 463         pReorderEntry->List.prev = pList;
 464         pList->next = &pReorderEntry->List;
 465
 466         return true;
 467 }
 468
 469 void rtllib_indicate_packets(struct rtllib_device *ieee, struct rtllib_rxb **prxbIndicateArray, u8 index)
 470 {
 471         struct net_device_stats *stats = &ieee->stats;
 472         u8 i = 0 , j = 0;
 473         u16 ethertype;
 474         for (j = 0; j < index; j++) {
 475                 struct rtllib_rxb *prxb = prxbIndicateArray[j];
 476                 for (i = 0; i < prxb->nr_subframes; i++) {
 477                         struct sk_buff *sub_skb = prxb->subframes[i];
 478
 479                 /* convert hdr + possible LLC headers into Ethernet header */
 480                         ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
 481                         if (sub_skb->len >= 8 &&
 482                             ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
 483                             ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
 484                             memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
 485                                 /* remove RFC1042 or Bridge-Tunnel encapsulation
 486                                  * and replace EtherType */
 487                                 skb_pull(sub_skb, SNAP_SIZE);
 488                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
 489                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
 490                         } else {
 491                                 u16 len;
 492                         /* Leave Ethernet header part of hdr and full payload */
 493                                 len = htons(sub_skb->len);
 494                                 memcpy(skb_push(sub_skb, 2), &len, 2);
 495                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
 496                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
 497                         }
 498
 499                         /* Indicate the packets to upper layer */
 500                         if (sub_skb) {
 501                                 stats->rx_packets++;
 502                                 stats->rx_bytes += sub_skb->len;
 503
 504                                 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
 505                                 sub_skb->protocol = eth_type_trans(sub_skb, ieee->dev);
 506                                 sub_skb->dev = ieee->dev;
 507                                 sub_skb->dev->stats.rx_packets++;
 508                                 sub_skb->dev->stats.rx_bytes += sub_skb->len;
 509                                 sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
 510                                 ieee->last_rx_ps_time = jiffies;
 511                                 netif_rx(sub_skb);
 512                         }
 513                 }
 514                 kfree(prxb);
 515                 prxb = NULL;
 516         }
 517 }
 518
 519 void rtllib_FlushRxTsPendingPkts(struct rtllib_device *ieee,    struct rx_ts_record *pTS)
 520 {
 521         struct rx_reorder_entry *pRxReorderEntry;
 522         u8 RfdCnt = 0;
 523
 524         del_timer_sync(&pTS->RxPktPendingTimer);
 525         while (!list_empty(&pTS->RxPendingPktList)) {
 526                 if (RfdCnt >= REORDER_WIN_SIZE) {
 527                         printk(KERN_INFO "-------------->%s() error! RfdCnt >= REORDER_WIN_SIZE\n", __func__);
 528                         break;
 529                 }
 530
 531                 pRxReorderEntry = (struct rx_reorder_entry *)list_entry(pTS->RxPendingPktList.prev, struct rx_reorder_entry, List);
 532                 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): Indicate SeqNum %d!\n", __func__, pRxReorderEntry->SeqNum);
 533                 list_del_init(&pRxReorderEntry->List);
 534
 535                 ieee->RfdArray[RfdCnt] = pRxReorderEntry->prxb;
 536
 537                 RfdCnt = RfdCnt + 1;
 538                 list_add_tail(&pRxReorderEntry->List, &ieee->RxReorder_Unused_List);
 539         }
 540         rtllib_indicate_packets(ieee, ieee->RfdArray, RfdCnt);
 541
 542         pTS->RxIndicateSeq = 0xffff;
 543 }
 544
 545 static void RxReorderIndicatePacket(struct rtllib_device *ieee,
 546                                     struct rtllib_rxb *prxb,
 547                                     struct rx_ts_record *pTS, u16 SeqNum)
 548 {
 549         struct rt_hi_throughput *pHTInfo = ieee->pHTInfo;
 550         struct rx_reorder_entry *pReorderEntry = NULL;
 551         u8 WinSize = pHTInfo->RxReorderWinSize;
 552         u16 WinEnd = 0;
 553         u8 index = 0;
 554         bool bMatchWinStart = false, bPktInBuf = false;
 555         unsigned long flags;
 556
 557         RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): Seq is %d, pTS->RxIndicateSeq"
 558                      " is %d, WinSize is %d\n", __func__, SeqNum,
 559                      pTS->RxIndicateSeq, WinSize);
 560
 561         spin_lock_irqsave(&(ieee->reorder_spinlock), flags);
 562
 563         WinEnd = (pTS->RxIndicateSeq + WinSize - 1) % 4096;
 564         /* Rx Reorder initialize condition.*/
 565         if (pTS->RxIndicateSeq == 0xffff)
 566                 pTS->RxIndicateSeq = SeqNum;
 567
 568         /* Drop out the packet which SeqNum is smaller than WinStart */
 569         if (SN_LESS(SeqNum, pTS->RxIndicateSeq)) {
 570                 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "Packet Drop! IndicateSeq: %d, NewSeq: %d\n",
 571                                  pTS->RxIndicateSeq, SeqNum);
 572                 pHTInfo->RxReorderDropCounter++;
 573                 {
 574                         int i;
 575                         for (i = 0; i < prxb->nr_subframes; i++)
 576                                 dev_kfree_skb(prxb->subframes[i]);
 577                         kfree(prxb);
 578                         prxb = NULL;
 579                 }
 580                 spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
 581                 return;
 582         }
 583
 584         /*
 585          * Sliding window manipulation. Conditions includes:
 586          * 1. Incoming SeqNum is equal to WinStart =>Window shift 1
 587          * 2. Incoming SeqNum is larger than the WinEnd => Window shift N
 588          */
 589         if (SN_EQUAL(SeqNum, pTS->RxIndicateSeq)) {
 590                 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
 591                 bMatchWinStart = true;
 592         } else if (SN_LESS(WinEnd, SeqNum)) {
 593                 if (SeqNum >= (WinSize - 1))
 594                         pTS->RxIndicateSeq = SeqNum + 1 - WinSize;
 595                 else
 596                         pTS->RxIndicateSeq = 4095 - (WinSize - (SeqNum + 1)) + 1;
 597                 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "Window Shift! IndicateSeq: %d,"
 598                              " NewSeq: %d\n", pTS->RxIndicateSeq, SeqNum);
 599         }
 600
 601         /*
 602          * Indication process.
 603          * After Packet dropping and Sliding Window shifting as above, we can
 604          * now just indicate the packets with the SeqNum smaller than latest
 605          * WinStart and struct buffer other packets.
 606          */
 607         /* For Rx Reorder condition:
 608          * 1. All packets with SeqNum smaller than WinStart => Indicate
 609          * 2. All packets with SeqNum larger than or equal to
 610          *       WinStart => Buffer it.
 611          */
 612         if (bMatchWinStart) {
 613                 /* Current packet is going to be indicated.*/
 614                 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "Packets indication!! "
 615                                 "IndicateSeq: %d, NewSeq: %d\n",
 616                                 pTS->RxIndicateSeq, SeqNum);
 617                 ieee->prxbIndicateArray[0] = prxb;
 618                 index = 1;
 619         } else {
 620                 /* Current packet is going to be inserted into pending list.*/
 621                 if (!list_empty(&ieee->RxReorder_Unused_List)) {
 622                         pReorderEntry = (struct rx_reorder_entry *)
 623                                         list_entry(ieee->RxReorder_Unused_List.next,
 624                                         struct rx_reorder_entry, List);
 625                         list_del_init(&pReorderEntry->List);
 626
 627                         /* Make a reorder entry and insert into a the packet list.*/
 628                         pReorderEntry->SeqNum = SeqNum;
 629                         pReorderEntry->prxb = prxb;
 630
 631                         if (!AddReorderEntry(pTS, pReorderEntry)) {
 632                                 RTLLIB_DEBUG(RTLLIB_DL_REORDER,
 633                                              "%s(): Duplicate packet is "
 634                                              "dropped!! IndicateSeq: %d, "
 635                                              "NewSeq: %d\n",
 636                                             __func__, pTS->RxIndicateSeq,
 637                                             SeqNum);
 638                                 list_add_tail(&pReorderEntry->List,
 639                                               &ieee->RxReorder_Unused_List); {
 640                                         int i;
 641                                         for (i = 0; i < prxb->nr_subframes; i++)
 642                                                 dev_kfree_skb(prxb->subframes[i]);
 643                                         kfree(prxb);
 644                                         prxb = NULL;
 645                                 }
 646                         } else {
 647                                 RTLLIB_DEBUG(RTLLIB_DL_REORDER,
 648                                          "Pkt insert into struct buffer!! "
 649                                          "IndicateSeq: %d, NewSeq: %d\n",
 650                                          pTS->RxIndicateSeq, SeqNum);
 651                         }
 652                 } else {
 653                         /*
 654                          * Packets are dropped if there are not enough reorder
 655                          * entries. This part should be modified!! We can just
 656                          * indicate all the packets in struct buffer and get
 657                          * reorder entries.
 658                          */
 659                         RTLLIB_DEBUG(RTLLIB_DL_ERR, "RxReorderIndicatePacket():"
 660                                      " There is no reorder entry!! Packet is "
 661                                      "dropped!!\n");
 662                         {
 663                                 int i;
 664                                 for (i = 0; i < prxb->nr_subframes; i++)
 665                                         dev_kfree_skb(prxb->subframes[i]);
 666                                 kfree(prxb);
 667                                 prxb = NULL;
 668                         }
 669                 }
 670         }
 671
 672         /* Check if there is any packet need indicate.*/
 673         while (!list_empty(&pTS->RxPendingPktList)) {
 674                 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): start RREORDER indicate\n", __func__);
 675
 676                 pReorderEntry = (struct rx_reorder_entry *)list_entry(pTS->RxPendingPktList.prev,
 677                                  struct rx_reorder_entry, List);
 678                 if (SN_LESS(pReorderEntry->SeqNum, pTS->RxIndicateSeq) ||
 679                                 SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq)) {
 680                         /* This protect struct buffer from overflow. */
 681                         if (index >= REORDER_WIN_SIZE) {
 682                                 RTLLIB_DEBUG(RTLLIB_DL_ERR, "RxReorderIndicate"
 683                                              "Packet(): Buffer overflow!!\n");
 684                                 bPktInBuf = true;
 685                                 break;
 686                         }
 687
 688                         list_del_init(&pReorderEntry->List);
 689
 690                         if (SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq))
 691                                 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
 692
 693                         ieee->prxbIndicateArray[index] = pReorderEntry->prxb;
 694                         RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): Indicate SeqNum"
 695                                      " %d!\n", __func__, pReorderEntry->SeqNum);
 696                         index++;
 697
 698                         list_add_tail(&pReorderEntry->List,
 699                                       &ieee->RxReorder_Unused_List);
 700                 } else {
 701                         bPktInBuf = true;
 702                         break;
 703                 }
 704         }
 705
 706         /* Handling pending timer. Set this timer to prevent from long time
 707          * Rx buffering.*/
 708         if (index > 0) {
 709                 if (timer_pending(&pTS->RxPktPendingTimer))
 710                         del_timer_sync(&pTS->RxPktPendingTimer);
 711                 pTS->RxTimeoutIndicateSeq = 0xffff;
 712
 713                 if (index > REORDER_WIN_SIZE) {
 714                         RTLLIB_DEBUG(RTLLIB_DL_ERR, "RxReorderIndicatePacket():"
 715                                      " Rx Reorer struct buffer full!!\n");
 716                         spin_unlock_irqrestore(&(ieee->reorder_spinlock),
 717                                                flags);
 718                         return;
 719                 }
 720                 rtllib_indicate_packets(ieee, ieee->prxbIndicateArray, index);
 721                 bPktInBuf = false;
 722         }
 723
 724         if (bPktInBuf && pTS->RxTimeoutIndicateSeq == 0xffff) {
 725                 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): SET rx timeout timer\n",
 726                              __func__);
 727                 pTS->RxTimeoutIndicateSeq = pTS->RxIndicateSeq;
 728                 mod_timer(&pTS->RxPktPendingTimer, jiffies +
 729                           MSECS(pHTInfo->RxReorderPendingTime));
 730         }
 731         spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
 732 }
 733
 734 static u8 parse_subframe(struct rtllib_device *ieee, struct sk_buff *skb,
 735                          struct rtllib_rx_stats *rx_stats,
 736                          struct rtllib_rxb *rxb, u8 *src, u8 *dst)
 737 {
 738         struct rtllib_hdr_3addr  *hdr = (struct rtllib_hdr_3addr *)skb->data;
 739         u16             fc = le16_to_cpu(hdr->frame_ctl);
 740
 741         u16             LLCOffset = sizeof(struct rtllib_hdr_3addr);
 742         u16             ChkLength;
 743         bool            bIsAggregateFrame = false;
 744         u16             nSubframe_Length;
 745         u8              nPadding_Length = 0;
 746         u16             SeqNum = 0;
 747         struct sk_buff *sub_skb;
 748         u8           *data_ptr;
 749         /* just for debug purpose */
 750         SeqNum = WLAN_GET_SEQ_SEQ(le16_to_cpu(hdr->seq_ctl));
 751         if ((RTLLIB_QOS_HAS_SEQ(fc)) &&
 752            (((union frameqos *)(skb->data + RTLLIB_3ADDR_LEN))->field.reserved))
 753                 bIsAggregateFrame = true;
 754
 755         if (RTLLIB_QOS_HAS_SEQ(fc))
 756                 LLCOffset += 2;
 757         if (rx_stats->bContainHTC)
 758                 LLCOffset += sHTCLng;
 759
 760         ChkLength = LLCOffset;
 761
 762         if (skb->len <= ChkLength)
 763                 return 0;
 764
 765         skb_pull(skb, LLCOffset);
 766         ieee->bIsAggregateFrame = bIsAggregateFrame;
 767         if (!bIsAggregateFrame) {
 768                 rxb->nr_subframes = 1;
 769
 770                 /* altered by clark 3/30/2010
 771                  * The struct buffer size of the skb indicated to upper layer
 772                  * must be less than 5000, or the defraged IP datagram
 773                  * in the IP layer will exceed "ipfrag_high_tresh" and be
 774                  * discarded. so there must not use the function
 775                  * "skb_copy" and "skb_clone" for "skb".
 776                  */
 777
 778                 /* Allocate new skb for releasing to upper layer */
 779                 sub_skb = dev_alloc_skb(RTLLIB_SKBBUFFER_SIZE);
 780                 skb_reserve(sub_skb, 12);
 781                 data_ptr = (u8 *)skb_put(sub_skb, skb->len);
 782                 memcpy(data_ptr, skb->data, skb->len);
 783                 sub_skb->dev = ieee->dev;
 784
 785                 rxb->subframes[0] = sub_skb;
 786
 787                 memcpy(rxb->src, src, ETH_ALEN);
 788                 memcpy(rxb->dst, dst, ETH_ALEN);
 789                 rxb->subframes[0]->dev = ieee->dev;
 790                 return 1;
 791         } else {
 792                 rxb->nr_subframes = 0;
 793                 memcpy(rxb->src, src, ETH_ALEN);
 794                 memcpy(rxb->dst, dst, ETH_ALEN);
 795                 while (skb->len > ETHERNET_HEADER_SIZE) {
 796                         /* Offset 12 denote 2 mac address */
 797                         nSubframe_Length = *((u16 *)(skb->data + 12));
 798                         nSubframe_Length = (nSubframe_Length >> 8) +
 799                                            (nSubframe_Length << 8);
 800
 801                         if (skb->len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) {
 802                                 printk(KERN_INFO "%s: A-MSDU parse error!! "
 803                                        "pRfd->nTotalSubframe : %d\n",\
 804                                        __func__, rxb->nr_subframes);
 805                                 printk(KERN_INFO "%s: A-MSDU parse error!! "
 806                                        "Subframe Length: %d\n", __func__,
 807                                        nSubframe_Length);
 808                                 printk(KERN_INFO "nRemain_Length is %d and "
 809                                        "nSubframe_Length is : %d\n", skb->len,
 810                                        nSubframe_Length);
 811                                 printk(KERN_INFO "The Packet SeqNum is %d\n", SeqNum);
 812                                 return 0;
 813                         }
 814
 815                         /* move the data point to data content */
 816                         skb_pull(skb, ETHERNET_HEADER_SIZE);
 817
 818                         /* altered by clark 3/30/2010
 819                          * The struct buffer size of the skb indicated to upper layer
 820                          * must be less than 5000, or the defraged IP datagram
 821                          * in the IP layer will exceed "ipfrag_high_tresh" and be
 822                          * discarded. so there must not use the function
 823                          * "skb_copy" and "skb_clone" for "skb".
 824                          */
 825
 826                         /* Allocate new skb for releasing to upper layer */
 827                         sub_skb = dev_alloc_skb(nSubframe_Length + 12);
 828                         skb_reserve(sub_skb, 12);
 829                         data_ptr = (u8 *)skb_put(sub_skb, nSubframe_Length);
 830                         memcpy(data_ptr, skb->data, nSubframe_Length);
 831
 832                         sub_skb->dev = ieee->dev;
 833                         rxb->subframes[rxb->nr_subframes++] = sub_skb;
 834                         if (rxb->nr_subframes >= MAX_SUBFRAME_COUNT) {
 835                                 RTLLIB_DEBUG_RX("ParseSubframe(): Too many "
 836                                                 "Subframes! Packets dropped!\n");
 837                                 break;
 838                         }
 839                         skb_pull(skb, nSubframe_Length);
 840
 841                         if (skb->len != 0) {
 842                                 nPadding_Length = 4 - ((nSubframe_Length +
 843                                                   ETHERNET_HEADER_SIZE) % 4);
 844                                 if (nPadding_Length == 4)
 845                                         nPadding_Length = 0;
 846
 847                                 if (skb->len < nPadding_Length)
 848                                         return 0;
 849
 850                                 skb_pull(skb, nPadding_Length);
 851                         }
 852                 }
 853
 854                 return rxb->nr_subframes;
 855         }
 856 }
 857
 858
 859 static size_t rtllib_rx_get_hdrlen(struct rtllib_device *ieee,
 860                                    struct sk_buff *skb,
 861                                    struct rtllib_rx_stats *rx_stats)
 862 {
 863         struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
 864         u16 fc = le16_to_cpu(hdr->frame_ctl);
 865         size_t hdrlen = 0;
 866
 867         hdrlen = rtllib_get_hdrlen(fc);
 868         if (HTCCheck(ieee, skb->data)) {
 869                 if (net_ratelimit())
 870                         printk(KERN_INFO "%s: find HTCControl!\n", __func__);
 871                 hdrlen += 4;
 872                 rx_stats->bContainHTC = 1;
 873         }
 874
 875          if (RTLLIB_QOS_HAS_SEQ(fc))
 876                 rx_stats->bIsQosData = 1;
 877
 878         return hdrlen;
 879 }
 880
 881 static int rtllib_rx_check_duplicate(struct rtllib_device *ieee,
 882                                      struct sk_buff *skb, u8 multicast)
 883 {
 884         struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
 885         u16 fc, sc;
 886         u8 frag, type, stype;
 887
 888         fc = le16_to_cpu(hdr->frame_ctl);
 889         type = WLAN_FC_GET_TYPE(fc);
 890         stype = WLAN_FC_GET_STYPE(fc);
 891         sc = le16_to_cpu(hdr->seq_ctl);
 892         frag = WLAN_GET_SEQ_FRAG(sc);
 893
 894         if ((ieee->pHTInfo->bCurRxReorderEnable == false) ||
 895                 !ieee->current_network.qos_data.active ||
 896                 !IsDataFrame(skb->data) ||
 897                 IsLegacyDataFrame(skb->data)) {
 898                 if (!((type == RTLLIB_FTYPE_MGMT) && (stype == RTLLIB_STYPE_BEACON))) {
 899                         if (is_duplicate_packet(ieee, hdr))
 900                                 return -1;
 901                 }
 902         } else {
 903                 struct rx_ts_record *pRxTS = NULL;
 904                 if (GetTs(ieee, (struct ts_common_info **) &pRxTS, hdr->addr2,
 905                         (u8)Frame_QoSTID((u8 *)(skb->data)), RX_DIR, true)) {
 906                         if ((fc & (1<<11)) && (frag == pRxTS->RxLastFragNum) &&
 907                             (WLAN_GET_SEQ_SEQ(sc) == pRxTS->RxLastSeqNum)) {
 908                                 return -1;
 909                         } else {
 910                                 pRxTS->RxLastFragNum = frag;
 911                                 pRxTS->RxLastSeqNum = WLAN_GET_SEQ_SEQ(sc);
 912                         }
 913                 } else {
 914                         RTLLIB_DEBUG(RTLLIB_DL_ERR, "ERR!!%s(): No TS!! Skip"
 915                                      " the check!!\n", __func__);
 916                         return -1;
 917                 }
 918         }
 919
 920         return 0;
 921 }
 922
 923 static void rtllib_rx_extract_addr(struct rtllib_device *ieee,
 924                                    struct rtllib_hdr_4addr *hdr, u8 *dst,
 925                                    u8 *src, u8 *bssid)
 926 {
 927         u16 fc = le16_to_cpu(hdr->frame_ctl);
 928
 929         switch (fc & (RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS)) {
 930         case RTLLIB_FCTL_FROMDS:
 931                 memcpy(dst, hdr->addr1, ETH_ALEN);
 932                 memcpy(src, hdr->addr3, ETH_ALEN);
 933                 memcpy(bssid, hdr->addr2, ETH_ALEN);
 934                 break;
 935         case RTLLIB_FCTL_TODS:
 936                 memcpy(dst, hdr->addr3, ETH_ALEN);
 937                 memcpy(src, hdr->addr2, ETH_ALEN);
 938                 memcpy(bssid, hdr->addr1, ETH_ALEN);
 939                 break;
 940         case RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS:
 941                 memcpy(dst, hdr->addr3, ETH_ALEN);
 942                 memcpy(src, hdr->addr4, ETH_ALEN);
 943                 memcpy(bssid, ieee->current_network.bssid, ETH_ALEN);
 944                 break;
 945         case 0:
 946                 memcpy(dst, hdr->addr1, ETH_ALEN);
 947                 memcpy(src, hdr->addr2, ETH_ALEN);
 948                 memcpy(bssid, hdr->addr3, ETH_ALEN);
 949                 break;
 950         }
 951 }
 952
 953 static int rtllib_rx_data_filter(struct rtllib_device *ieee, u16 fc,
 954                                  u8 *dst, u8 *src, u8 *bssid, u8 *addr2)
 955 {
 956         u8 zero_addr[ETH_ALEN] = {0};
 957         u8 type, stype;
 958
 959         type = WLAN_FC_GET_TYPE(fc);
 960         stype = WLAN_FC_GET_STYPE(fc);
 961
 962         /* Filter frames from different BSS */
 963         if (((fc & RTLLIB_FCTL_DSTODS) != RTLLIB_FCTL_DSTODS)
 964                 && (compare_ether_addr(ieee->current_network.bssid, bssid) != 0)
 965                 && memcmp(ieee->current_network.bssid, zero_addr, ETH_ALEN)) {
 966                 return -1;
 967         }
 968
 969         /* Filter packets sent by an STA that will be forwarded by AP */
 970         if (ieee->IntelPromiscuousModeInfo.bPromiscuousOn  &&
 971                 ieee->IntelPromiscuousModeInfo.bFilterSourceStationFrame) {
 972                 if ((fc & RTLLIB_FCTL_TODS) && !(fc & RTLLIB_FCTL_FROMDS) &&
 973                         (compare_ether_addr(dst, ieee->current_network.bssid) != 0) &&
 974                         (compare_ether_addr(bssid, ieee->current_network.bssid) == 0)) {
 975                         return -1;
 976                 }
 977         }
 978
 979         /* Nullfunc frames may have PS-bit set, so they must be passed to
 980          * hostap_handle_sta_rx() before being dropped here. */
 981         if (!ieee->IntelPromiscuousModeInfo.bPromiscuousOn) {
 982                 if (stype != RTLLIB_STYPE_DATA &&
 983                     stype != RTLLIB_STYPE_DATA_CFACK &&
 984                     stype != RTLLIB_STYPE_DATA_CFPOLL &&
 985                     stype != RTLLIB_STYPE_DATA_CFACKPOLL &&
 986                     stype != RTLLIB_STYPE_QOS_DATA) {
 987                         if (stype != RTLLIB_STYPE_NULLFUNC)
 988                                 RTLLIB_DEBUG_DROP(
 989                                         "RX: dropped data frame "
 990                                         "with no data (type=0x%02x, "
 991                                         "subtype=0x%02x)\n",
 992                                         type, stype);
 993                         return -1;
 994                 }
 995         }
 996
 997         if (ieee->iw_mode != IW_MODE_MESH) {
 998                 /* packets from our adapter are dropped (echo) */
 999                 if (!memcmp(src, ieee->dev->dev_addr, ETH_ALEN))
1000                         return -1;
1001
1002                 /* {broad,multi}cast packets to our BSS go through */
1003                 if (is_multicast_ether_addr(dst)) {
1004                         if (memcmp(bssid, ieee->current_network.bssid, ETH_ALEN))
1005                                 return -1;
1006                 }
1007         }
1008         return 0;
1009 }
1010
1011 static int rtllib_rx_get_crypt(struct rtllib_device *ieee, struct sk_buff *skb,
1012                         struct lib80211_crypt_data **crypt, size_t hdrlen)
1013 {
1014         struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1015         u16 fc = le16_to_cpu(hdr->frame_ctl);
1016         int idx = 0;
1017
1018         if (ieee->host_decrypt) {
1019                 if (skb->len >= hdrlen + 3)
1020                         idx = skb->data[hdrlen + 3] >> 6;
1021
1022                 *crypt = ieee->crypt_info.crypt[idx];
1023                 /* allow NULL decrypt to indicate an station specific override
1024                  * for default encryption */
1025                 if (*crypt && ((*crypt)->ops == NULL ||
1026                               (*crypt)->ops->decrypt_mpdu == NULL))
1027                         *crypt = NULL;
1028
1029                 if (!*crypt && (fc & RTLLIB_FCTL_WEP)) {
1030                         /* This seems to be triggered by some (multicast?)
1031                          * frames from other than current BSS, so just drop the
1032                          * frames silently instead of filling system log with
1033                          * these reports. */
1034                         RTLLIB_DEBUG_DROP("Decryption failed (not set)"
1035                                              " (SA= %pM)\n",
1036                                              hdr->addr2);
1037                         ieee->ieee_stats.rx_discards_undecryptable++;
1038                         return -1;
1039                 }
1040         }
1041
1042         return 0;
1043 }
1044
1045 static int rtllib_rx_decrypt(struct rtllib_device *ieee, struct sk_buff *skb,
1046                       struct rtllib_rx_stats *rx_stats,
1047                       struct lib80211_crypt_data *crypt, size_t hdrlen)
1048 {
1049         struct rtllib_hdr_4addr *hdr;
1050         int keyidx = 0;
1051         u16 fc, sc;
1052         u8 frag;
1053
1054         hdr = (struct rtllib_hdr_4addr *)skb->data;
1055         fc = le16_to_cpu(hdr->frame_ctl);
1056         sc = le16_to_cpu(hdr->seq_ctl);
1057         frag = WLAN_GET_SEQ_FRAG(sc);
1058
1059         if ((!rx_stats->Decrypted))
1060                 ieee->need_sw_enc = 1;
1061         else
1062                 ieee->need_sw_enc = 0;
1063
1064         keyidx = rtllib_rx_frame_decrypt(ieee, skb, crypt);
1065         if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) && (keyidx < 0)) {
1066                 printk(KERN_INFO "%s: decrypt frame error\n", __func__);
1067                 return -1;
1068         }
1069
1070         hdr = (struct rtllib_hdr_4addr *) skb->data;
1071         if ((frag != 0 || (fc & RTLLIB_FCTL_MOREFRAGS))) {
1072                 int flen;
1073                 struct sk_buff *frag_skb = rtllib_frag_cache_get(ieee, hdr);
1074                 RTLLIB_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
1075
1076                 if (!frag_skb) {
1077                         RTLLIB_DEBUG(RTLLIB_DL_RX | RTLLIB_DL_FRAG,
1078                                         "Rx cannot get skb from fragment "
1079                                         "cache (morefrag=%d seq=%u frag=%u)\n",
1080                                         (fc & RTLLIB_FCTL_MOREFRAGS) != 0,
1081                                         WLAN_GET_SEQ_SEQ(sc), frag);
1082                         return -1;
1083                 }
1084                 flen = skb->len;
1085                 if (frag != 0)
1086                         flen -= hdrlen;
1087
1088                 if (frag_skb->tail + flen > frag_skb->end) {
1089                         printk(KERN_WARNING "%s: host decrypted and "
1090                                "reassembled frame did not fit skb\n",
1091                                __func__);
1092                         rtllib_frag_cache_invalidate(ieee, hdr);
1093                         return -1;
1094                 }
1095
1096                 if (frag == 0) {
1097                         /* copy first fragment (including full headers) into
1098                          * beginning of the fragment cache skb */
1099                         memcpy(skb_put(frag_skb, flen), skb->data, flen);
1100                 } else {
1101                         /* append frame payload to the end of the fragment
1102                          * cache skb */
1103                         memcpy(skb_put(frag_skb, flen), skb->data + hdrlen,
1104                                flen);
1105                 }
1106                 dev_kfree_skb_any(skb);
1107                 skb = NULL;
1108
1109                 if (fc & RTLLIB_FCTL_MOREFRAGS) {
1110                         /* more fragments expected - leave the skb in fragment
1111                          * cache for now; it will be delivered to upper layers
1112                          * after all fragments have been received */
1113                         return -2;
1114                 }
1115
1116                 /* this was the last fragment and the frame will be
1117                  * delivered, so remove skb from fragment cache */
1118                 skb = frag_skb;
1119                 hdr = (struct rtllib_hdr_4addr *) skb->data;
1120                 rtllib_frag_cache_invalidate(ieee, hdr);
1121         }
1122
1123         /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
1124          * encrypted/authenticated */
1125         if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) &&
1126                 rtllib_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt)) {
1127                 printk(KERN_INFO "%s: ==>decrypt msdu error\n", __func__);
1128                 return -1;
1129         }
1130
1131         hdr = (struct rtllib_hdr_4addr *) skb->data;
1132         if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep) {
1133                 if (/*ieee->ieee802_1x &&*/
1134                     rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1135
1136                         /* pass unencrypted EAPOL frames even if encryption is
1137                          * configured */
1138                         struct eapol *eap = (struct eapol *)(skb->data +
1139                                 24);
1140                         RTLLIB_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1141                                                 eap_get_type(eap->type));
1142                 } else {
1143                         RTLLIB_DEBUG_DROP(
1144                                 "encryption configured, but RX "
1145                                 "frame not encrypted (SA= %pM)\n",
1146                                 hdr->addr2);
1147                         return -1;
1148                 }
1149         }
1150
1151         if (crypt && !(fc & RTLLIB_FCTL_WEP) &&
1152             rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1153                         struct eapol *eap = (struct eapol *)(skb->data +
1154                                 24);
1155                         RTLLIB_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1156                                                 eap_get_type(eap->type));
1157         }
1158
1159         if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep &&
1160             !rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1161                 RTLLIB_DEBUG_DROP(
1162                         "dropped unencrypted RX data "
1163                         "frame from %pM"
1164                         " (drop_unencrypted=1)\n",
1165                         hdr->addr2);
1166                 return -1;
1167         }
1168
1169         if (rtllib_is_eapol_frame(ieee, skb, hdrlen))
1170                 printk(KERN_WARNING "RX: IEEE802.1X EAPOL frame!\n");
1171
1172         return 0;
1173 }
1174
1175 static void rtllib_rx_check_leave_lps(struct rtllib_device *ieee, u8 unicast, u8 nr_subframes)
1176 {
1177         if (unicast) {
1178
1179                 if ((ieee->state == RTLLIB_LINKED)) {
1180                         if (((ieee->LinkDetectInfo.NumRxUnicastOkInPeriod +
1181                             ieee->LinkDetectInfo.NumTxOkInPeriod) > 8) ||
1182                             (ieee->LinkDetectInfo.NumRxUnicastOkInPeriod > 2)) {
1183                                 if (ieee->LeisurePSLeave)
1184                                         ieee->LeisurePSLeave(ieee->dev);
1185                         }
1186                 }
1187         }
1188         ieee->last_rx_ps_time = jiffies;
1189 }
1190
1191 static void rtllib_rx_indicate_pkt_legacy(struct rtllib_device *ieee,
1192                 struct rtllib_rx_stats *rx_stats,
1193                 struct rtllib_rxb *rxb,
1194                 u8 *dst,
1195                 u8 *src)
1196 {
1197         struct net_device *dev = ieee->dev;
1198         u16 ethertype;
1199         int i = 0;
1200
1201         if (rxb == NULL) {
1202                 printk(KERN_INFO "%s: rxb is NULL!!\n", __func__);
1203                 return ;
1204         }
1205
1206         for (i = 0; i < rxb->nr_subframes; i++) {
1207                 struct sk_buff *sub_skb = rxb->subframes[i];
1208
1209                 if (sub_skb) {
1210                         /* convert hdr + possible LLC headers into Ethernet header */
1211                         ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
1212                         if (sub_skb->len >= 8 &&
1213                                 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
1214                                 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
1215                                 memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
1216                                 /* remove RFC1042 or Bridge-Tunnel encapsulation and
1217                                  * replace EtherType */
1218                                 skb_pull(sub_skb, SNAP_SIZE);
1219                                 memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
1220                                 memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
1221                         } else {
1222                                 u16 len;
1223                                 /* Leave Ethernet header part of hdr and full payload */
1224                                 len = htons(sub_skb->len);
1225                                 memcpy(skb_push(sub_skb, 2), &len, 2);
1226                                 memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
1227                                 memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
1228                         }
1229
1230                         ieee->stats.rx_packets++;
1231                         ieee->stats.rx_bytes += sub_skb->len;
1232
1233                         if (is_multicast_ether_addr(dst))
1234                                 ieee->stats.multicast++;
1235
1236                         /* Indicate the packets to upper layer */
1237                         memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
1238                         sub_skb->protocol = eth_type_trans(sub_skb, dev);
1239                         sub_skb->dev = dev;
1240                         sub_skb->dev->stats.rx_packets++;
1241                         sub_skb->dev->stats.rx_bytes += sub_skb->len;
1242                         sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
1243                         netif_rx(sub_skb);
1244                 }
1245         }
1246         kfree(rxb);
1247         rxb = NULL;
1248 }
1249
1250 static int rtllib_rx_InfraAdhoc(struct rtllib_device *ieee, struct sk_buff *skb,
1251                  struct rtllib_rx_stats *rx_stats)
1252 {
1253         struct net_device *dev = ieee->dev;
1254         struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1255         struct lib80211_crypt_data *crypt = NULL;
1256         struct rtllib_rxb *rxb = NULL;
1257         struct rx_ts_record *pTS = NULL;
1258         u16 fc, sc, SeqNum = 0;
1259         u8 type, stype, multicast = 0, unicast = 0, nr_subframes = 0, TID = 0;
1260         u8 dst[ETH_ALEN], src[ETH_ALEN], bssid[ETH_ALEN] = {0}, *payload;
1261         size_t hdrlen = 0;
1262         bool bToOtherSTA = false;
1263         int ret = 0, i = 0;
1264
1265         hdr = (struct rtllib_hdr_4addr *)skb->data;
1266         fc = le16_to_cpu(hdr->frame_ctl);
1267         type = WLAN_FC_GET_TYPE(fc);
1268         stype = WLAN_FC_GET_STYPE(fc);
1269         sc = le16_to_cpu(hdr->seq_ctl);
1270
1271         /*Filter pkt not to me*/
1272         multicast = is_multicast_ether_addr(hdr->addr1);
1273         unicast = !multicast;
1274         if (unicast && (compare_ether_addr(dev->dev_addr, hdr->addr1) != 0)) {
1275                 if (ieee->bNetPromiscuousMode)
1276                         bToOtherSTA = true;
1277                 else
1278                         goto rx_dropped;
1279         }
1280
1281         /*Filter pkt has too small length */
1282         hdrlen = rtllib_rx_get_hdrlen(ieee, skb, rx_stats);
1283         if (skb->len < hdrlen) {
1284                 printk(KERN_INFO "%s():ERR!!! skb->len is smaller than hdrlen\n", __func__);
1285                 goto rx_dropped;
1286         }
1287
1288         /* Filter Duplicate pkt */
1289         ret = rtllib_rx_check_duplicate(ieee, skb, multicast);
1290         if (ret < 0)
1291                 goto rx_dropped;
1292
1293         /* Filter CTRL Frame */
1294         if (type == RTLLIB_FTYPE_CTL)
1295                 goto rx_dropped;
1296
1297         /* Filter MGNT Frame */
1298         if (type == RTLLIB_FTYPE_MGMT) {
1299                 if (bToOtherSTA)
1300                         goto rx_dropped;
1301                 if (rtllib_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
1302                         goto rx_dropped;
1303                 else
1304                         goto rx_exit;
1305         }
1306
1307         /* Filter WAPI DATA Frame */
1308
1309         /* Update statstics for AP roaming */
1310         if (!bToOtherSTA) {
1311                 ieee->LinkDetectInfo.NumRecvDataInPeriod++;
1312                 ieee->LinkDetectInfo.NumRxOkInPeriod++;
1313         }
1314         dev->last_rx = jiffies;
1315
1316         /* Data frame - extract src/dst addresses */
1317         rtllib_rx_extract_addr(ieee, hdr, dst, src, bssid);
1318
1319         /* Filter Data frames */
1320         ret = rtllib_rx_data_filter(ieee, fc, dst, src, bssid, hdr->addr2);
1321         if (ret < 0)
1322                 goto rx_dropped;
1323
1324         if (skb->len == hdrlen)
1325                 goto rx_dropped;
1326
1327         /* Send pspoll based on moredata */
1328         if ((ieee->iw_mode == IW_MODE_INFRA)  && (ieee->sta_sleep == LPS_IS_SLEEP)
1329                 && (ieee->polling) && (!bToOtherSTA)) {
1330                 if (WLAN_FC_MORE_DATA(fc)) {
1331                         /* more data bit is set, let's request a new frame from the AP */
1332                         rtllib_sta_ps_send_pspoll_frame(ieee);
1333                 } else {
1334                         ieee->polling =  false;
1335                 }
1336         }
1337
1338         /* Get crypt if encrypted */
1339         ret = rtllib_rx_get_crypt(ieee, skb, &crypt, hdrlen);
1340         if (ret == -1)
1341                 goto rx_dropped;
1342
1343         /* Decrypt data frame (including reassemble) */
1344         ret = rtllib_rx_decrypt(ieee, skb, rx_stats, crypt, hdrlen);
1345         if (ret == -1)
1346                 goto rx_dropped;
1347         else if (ret == -2)
1348                 goto rx_exit;
1349
1350         /* Get TS for Rx Reorder  */
1351         hdr = (struct rtllib_hdr_4addr *) skb->data;
1352         if (ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data)
1353                 && !is_multicast_ether_addr(hdr->addr1)
1354                 && (!bToOtherSTA)) {
1355                 TID = Frame_QoSTID(skb->data);
1356                 SeqNum = WLAN_GET_SEQ_SEQ(sc);
1357                 GetTs(ieee, (struct ts_common_info **) &pTS, hdr->addr2, TID, RX_DIR, true);
1358                 if (TID != 0 && TID != 3)
1359                         ieee->bis_any_nonbepkts = true;
1360         }
1361
1362         /* Parse rx data frame (For AMSDU) */
1363         /* skb: hdr + (possible reassembled) full plaintext payload */
1364         payload = skb->data + hdrlen;
1365         rxb = kmalloc(sizeof(struct rtllib_rxb), GFP_ATOMIC);
1366         if (rxb == NULL) {
1367                 RTLLIB_DEBUG(RTLLIB_DL_ERR,
1368                              "%s(): kmalloc rxb error\n", __func__);
1369                 goto rx_dropped;
1370         }
1371         /* to parse amsdu packets */
1372         /* qos data packets & reserved bit is 1 */
1373         if (parse_subframe(ieee, skb, rx_stats, rxb, src, dst) == 0) {
1374                 /* only to free rxb, and not submit the packets to upper layer */
1375                 for (i = 0; i < rxb->nr_subframes; i++)
1376                         dev_kfree_skb(rxb->subframes[i]);
1377                 kfree(rxb);
1378                 rxb = NULL;
1379                 goto rx_dropped;
1380         }
1381
1382         /* Update WAPI PN */
1383
1384         /* Check if leave LPS */
1385         if (!bToOtherSTA) {
1386                 if (ieee->bIsAggregateFrame)
1387                         nr_subframes = rxb->nr_subframes;
1388                 else
1389                         nr_subframes = 1;
1390                 if (unicast)
1391                         ieee->LinkDetectInfo.NumRxUnicastOkInPeriod += nr_subframes;
1392                 rtllib_rx_check_leave_lps(ieee, unicast, nr_subframes);
1393         }
1394
1395         /* Indicate packets to upper layer or Rx Reorder */
1396         if (ieee->pHTInfo->bCurRxReorderEnable == false || pTS == NULL || bToOtherSTA)
1397                 rtllib_rx_indicate_pkt_legacy(ieee, rx_stats, rxb, dst, src);
1398         else
1399                 RxReorderIndicatePacket(ieee, rxb, pTS, SeqNum);
1400
1401         dev_kfree_skb(skb);
1402
1403  rx_exit:
1404         return 1;
1405
1406  rx_dropped:
1407         if (rxb != NULL) {
1408                 kfree(rxb);
1409                 rxb = NULL;
1410         }
1411         ieee->stats.rx_dropped++;
1412
1413         /* Returning 0 indicates to caller that we have not handled the SKB--
1414          * so it is still allocated and can be used again by underlying
1415          * hardware as a DMA target */
1416         return 0;
1417 }
1418
1419 static int rtllib_rx_Master(struct rtllib_device *ieee, struct sk_buff *skb,
1420                  struct rtllib_rx_stats *rx_stats)
1421 {
1422         return 0;
1423 }
1424
1425 static int rtllib_rx_Monitor(struct rtllib_device *ieee, struct sk_buff *skb,
1426                  struct rtllib_rx_stats *rx_stats)
1427 {
1428         struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1429         u16 fc = le16_to_cpu(hdr->frame_ctl);
1430         size_t hdrlen = rtllib_get_hdrlen(fc);
1431
1432         if (skb->len < hdrlen) {
1433                 printk(KERN_INFO "%s():ERR!!! skb->len is smaller than hdrlen\n", __func__);
1434                 return 0;
1435         }
1436
1437         if (HTCCheck(ieee, skb->data)) {
1438                 if (net_ratelimit())
1439                         printk(KERN_INFO "%s: Find HTCControl!\n", __func__);
1440                 hdrlen += 4;
1441         }
1442
1443         rtllib_monitor_rx(ieee, skb, rx_stats, hdrlen);
1444         ieee->stats.rx_packets++;
1445         ieee->stats.rx_bytes += skb->len;
1446
1447         return 1;
1448 }
1449
1450 static int rtllib_rx_Mesh(struct rtllib_device *ieee, struct sk_buff *skb,
1451                  struct rtllib_rx_stats *rx_stats)
1452 {
1453         return 0;
1454 }
1455
1456 /* All received frames are sent to this function. @skb contains the frame in
1457  * IEEE 802.11 format, i.e., in the format it was sent over air.
1458  * This function is called only as a tasklet (software IRQ). */
1459 int rtllib_rx(struct rtllib_device *ieee, struct sk_buff *skb,
1460                  struct rtllib_rx_stats *rx_stats)
1461 {
1462         int ret = 0;
1463
1464         if ((NULL == ieee) || (NULL == skb) || (NULL == rx_stats)) {
1465                 printk(KERN_INFO "%s: Input parameters NULL!\n", __func__);
1466                 goto rx_dropped;
1467         }
1468         if (skb->len < 10) {
1469                 printk(KERN_INFO "%s: SKB length < 10\n", __func__);
1470                 goto rx_dropped;
1471         }
1472
1473         switch (ieee->iw_mode) {
1474         case IW_MODE_ADHOC:
1475         case IW_MODE_INFRA:
1476                 ret = rtllib_rx_InfraAdhoc(ieee, skb, rx_stats);
1477                 break;
1478         case IW_MODE_MASTER:
1479         case IW_MODE_REPEAT:
1480                 ret = rtllib_rx_Master(ieee, skb, rx_stats);
1481                 break;
1482         case IW_MODE_MONITOR:
1483                 ret = rtllib_rx_Monitor(ieee, skb, rx_stats);
1484                 break;
1485         case IW_MODE_MESH:
1486                 ret = rtllib_rx_Mesh(ieee, skb, rx_stats);
1487                 break;
1488         default:
1489                 printk(KERN_INFO"%s: ERR iw mode!!!\n", __func__);
1490                 break;
1491         }
1492
1493         return ret;
1494
1495  rx_dropped:
1496         ieee->stats.rx_dropped++;
1497         return 0;
1498 }
1499 EXPORT_SYMBOL(rtllib_rx);
1500
1501 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
1502
1503 /*
1504 * Make ther structure we read from the beacon packet has
1505 * the right values
1506 */
1507 static int rtllib_verify_qos_info(struct rtllib_qos_information_element
1508                                      *info_element, int sub_type)
1509 {
1510
1511         if (info_element->qui_subtype != sub_type)
1512                 return -1;
1513         if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
1514                 return -1;
1515         if (info_element->qui_type != QOS_OUI_TYPE)
1516                 return -1;
1517         if (info_element->version != QOS_VERSION_1)
1518                 return -1;
1519
1520         return 0;
1521 }
1522
1523
1524 /*
1525  * Parse a QoS parameter element
1526  */
1527 static int rtllib_read_qos_param_element(struct rtllib_qos_parameter_info
1528                                             *element_param, struct rtllib_info_element
1529                                             *info_element)
1530 {
1531         int ret = 0;
1532         u16 size = sizeof(struct rtllib_qos_parameter_info) - 2;
1533
1534         if ((info_element == NULL) || (element_param == NULL))
1535                 return -1;
1536
1537         if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
1538                 memcpy(element_param->info_element.qui, info_element->data,
1539                        info_element->len);
1540                 element_param->info_element.elementID = info_element->id;
1541                 element_param->info_element.length = info_element->len;
1542         } else
1543                 ret = -1;
1544         if (ret == 0)
1545                 ret = rtllib_verify_qos_info(&element_param->info_element,
1546                                                 QOS_OUI_PARAM_SUB_TYPE);
1547         return ret;
1548 }
1549
1550 /*
1551  * Parse a QoS information element
1552  */
1553 static int rtllib_read_qos_info_element(struct
1554                                            rtllib_qos_information_element
1555                                            *element_info, struct rtllib_info_element
1556                                            *info_element)
1557 {
1558         int ret = 0;
1559         u16 size = sizeof(struct rtllib_qos_information_element) - 2;
1560
1561         if (element_info == NULL)
1562                 return -1;
1563         if (info_element == NULL)
1564                 return -1;
1565
1566         if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
1567                 memcpy(element_info->qui, info_element->data,
1568                        info_element->len);
1569                 element_info->elementID = info_element->id;
1570                 element_info->length = info_element->len;
1571         } else
1572                 ret = -1;
1573
1574         if (ret == 0)
1575                 ret = rtllib_verify_qos_info(element_info,
1576                                                 QOS_OUI_INFO_SUB_TYPE);
1577         return ret;
1578 }
1579
1580
1581 /*
1582  * Write QoS parameters from the ac parameters.
1583  */
1584 static int rtllib_qos_convert_ac_to_parameters(struct rtllib_qos_parameter_info *param_elm,
1585                 struct rtllib_qos_data *qos_data)
1586 {
1587         struct rtllib_qos_ac_parameter *ac_params;
1588         struct rtllib_qos_parameters *qos_param = &(qos_data->parameters);
1589         int rc = 0;
1590         int i;
1591         u8 aci;
1592         u8 acm;
1593
1594         qos_data->wmm_acm = 0;
1595         for (i = 0; i < QOS_QUEUE_NUM; i++) {
1596                 ac_params = &(param_elm->ac_params_record[i]);
1597
1598                 aci = (ac_params->aci_aifsn & 0x60) >> 5;
1599                 acm = (ac_params->aci_aifsn & 0x10) >> 4;
1600
1601                 if (aci >= QOS_QUEUE_NUM)
1602                         continue;
1603                 switch (aci) {
1604                 case 1:
1605                         /* BIT(0) | BIT(3) */
1606                         if (acm)
1607                                 qos_data->wmm_acm |= (0x01<<0)|(0x01<<3);
1608                         break;
1609                 case 2:
1610                         /* BIT(4) | BIT(5) */
1611                         if (acm)
1612                                 qos_data->wmm_acm |= (0x01<<4)|(0x01<<5);
1613                         break;
1614                 case 3:
1615                         /* BIT(6) | BIT(7) */
1616                         if (acm)
1617                                 qos_data->wmm_acm |= (0x01<<6)|(0x01<<7);
1618                         break;
1619                 case 0:
1620                 default:
1621                         /* BIT(1) | BIT(2) */
1622                         if (acm)
1623                                 qos_data->wmm_acm |= (0x01<<1)|(0x01<<2);
1624                         break;
1625                 }
1626
1627                 qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f;
1628
1629                 /* WMM spec P.11: The minimum value for AIFSN shall be 2 */
1630                 qos_param->aifs[aci] = (qos_param->aifs[aci] < 2) ? 2 : qos_param->aifs[aci];
1631
1632                 qos_param->cw_min[aci] = ac_params->ecw_min_max & 0x0F;
1633
1634                 qos_param->cw_max[aci] = (ac_params->ecw_min_max & 0xF0) >> 4;
1635
1636                 qos_param->flag[aci] =
1637                     (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1638                 qos_param->tx_op_limit[aci] = le16_to_cpu(ac_params->tx_op_limit);
1639         }
1640         return rc;
1641 }
1642
1643 /*
1644  * we have a generic data element which it may contain QoS information or
1645  * parameters element. check the information element length to decide
1646  * which type to read
1647  */
1648 static int rtllib_parse_qos_info_param_IE(struct rtllib_info_element
1649                                              *info_element,
1650                                              struct rtllib_network *network)
1651 {
1652         int rc = 0;
1653         struct rtllib_qos_information_element qos_info_element;
1654
1655         rc = rtllib_read_qos_info_element(&qos_info_element, info_element);
1656
1657         if (rc == 0) {
1658                 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1659                 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1660         } else {
1661                 struct rtllib_qos_parameter_info param_element;
1662
1663                 rc = rtllib_read_qos_param_element(&param_element,
1664                                                       info_element);
1665                 if (rc == 0) {
1666                         rtllib_qos_convert_ac_to_parameters(&param_element,
1667                                                                &(network->qos_data));
1668                         network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1669                         network->qos_data.param_count =
1670                             param_element.info_element.ac_info & 0x0F;
1671                 }
1672         }
1673
1674         if (rc == 0) {
1675                 RTLLIB_DEBUG_QOS("QoS is supported\n");
1676                 network->qos_data.supported = 1;
1677         }
1678         return rc;
1679 }
1680
1681 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
1682
1683 static const char *get_info_element_string(u16 id)
1684 {
1685         switch (id) {
1686         MFIE_STRING(SSID);
1687         MFIE_STRING(RATES);
1688         MFIE_STRING(FH_SET);
1689         MFIE_STRING(DS_SET);
1690         MFIE_STRING(CF_SET);
1691         MFIE_STRING(TIM);
1692         MFIE_STRING(IBSS_SET);
1693         MFIE_STRING(COUNTRY);
1694         MFIE_STRING(HOP_PARAMS);
1695         MFIE_STRING(HOP_TABLE);
1696         MFIE_STRING(REQUEST);
1697         MFIE_STRING(CHALLENGE);
1698         MFIE_STRING(POWER_CONSTRAINT);
1699         MFIE_STRING(POWER_CAPABILITY);
1700         MFIE_STRING(TPC_REQUEST);
1701         MFIE_STRING(TPC_REPORT);
1702         MFIE_STRING(SUPP_CHANNELS);
1703         MFIE_STRING(CSA);
1704         MFIE_STRING(MEASURE_REQUEST);
1705         MFIE_STRING(MEASURE_REPORT);
1706         MFIE_STRING(QUIET);
1707         MFIE_STRING(IBSS_DFS);
1708         MFIE_STRING(RSN);
1709         MFIE_STRING(RATES_EX);
1710         MFIE_STRING(GENERIC);
1711         MFIE_STRING(QOS_PARAMETER);
1712         default:
1713                 return "UNKNOWN";
1714         }
1715 }
1716
1717 static inline void rtllib_extract_country_ie(
1718         struct rtllib_device *ieee,
1719         struct rtllib_info_element *info_element,
1720         struct rtllib_network *network,
1721         u8 *addr2)
1722 {
1723         if (IS_DOT11D_ENABLE(ieee)) {
1724                 if (info_element->len != 0) {
1725                         memcpy(network->CountryIeBuf, info_element->data, info_element->len);
1726                         network->CountryIeLen = info_element->len;
1727
1728                         if (!IS_COUNTRY_IE_VALID(ieee)) {
1729                                 if ((rtllib_act_scanning(ieee, false) == true) && (ieee->FirstIe_InScan == 1))
1730                                         printk(KERN_INFO "Received beacon ContryIE, SSID: <%s>\n", network->ssid);
1731                                 Dot11d_UpdateCountryIe(ieee, addr2, info_element->len, info_element->data);
1732                         }
1733                 }
1734
1735                 if (IS_EQUAL_CIE_SRC(ieee, addr2))
1736                         UPDATE_CIE_WATCHDOG(ieee);
1737         }
1738
1739 }
1740
1741 int rtllib_parse_info_param(struct rtllib_device *ieee,
1742                 struct rtllib_info_element *info_element,
1743                 u16 length,
1744                 struct rtllib_network *network,
1745                 struct rtllib_rx_stats *stats)
1746 {
1747         u8 i;
1748         short offset;
1749         u16     tmp_htcap_len = 0;
1750         u16     tmp_htinfo_len = 0;
1751         u16 ht_realtek_agg_len = 0;
1752         u8  ht_realtek_agg_buf[MAX_IE_LEN];
1753         char rates_str[64];
1754         char *p;
1755
1756         while (length >= sizeof(*info_element)) {
1757                 if (sizeof(*info_element) + info_element->len > length) {
1758                         RTLLIB_DEBUG_MGMT("Info elem: parse failed: "
1759                                              "info_element->len + 2 > left : "
1760                                              "info_element->len+2=%zd left=%d, id=%d.\n",
1761                                              info_element->len +
1762                                              sizeof(*info_element),
1763                                              length, info_element->id);
1764                         /* We stop processing but don't return an error here
1765                          * because some misbehaviour APs break this rule. ie.
1766                          * Orinoco AP1000. */
1767                         break;
1768                 }
1769
1770                 switch (info_element->id) {
1771                 case MFIE_TYPE_SSID:
1772                         if (rtllib_is_empty_essid(info_element->data,
1773                                                      info_element->len)) {
1774                                 network->flags |= NETWORK_EMPTY_ESSID;
1775                                 break;
1776                         }
1777
1778                         network->ssid_len = min(info_element->len,
1779                                                 (u8) IW_ESSID_MAX_SIZE);
1780                         memcpy(network->ssid, info_element->data, network->ssid_len);
1781                         if (network->ssid_len < IW_ESSID_MAX_SIZE)
1782                                 memset(network->ssid + network->ssid_len, 0,
1783                                        IW_ESSID_MAX_SIZE - network->ssid_len);
1784
1785                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
1786                                              network->ssid, network->ssid_len);
1787                         break;
1788
1789                 case MFIE_TYPE_RATES:
1790                         p = rates_str;
1791                         network->rates_len = min(info_element->len,
1792                                                  MAX_RATES_LENGTH);
1793                         for (i = 0; i < network->rates_len; i++) {
1794                                 network->rates[i] = info_element->data[i];
1795                                 p += snprintf(p, sizeof(rates_str) -
1796                                               (p - rates_str), "%02X ",
1797                                               network->rates[i]);
1798                                 if (rtllib_is_ofdm_rate
1799                                     (info_element->data[i])) {
1800                                         network->flags |= NETWORK_HAS_OFDM;
1801                                         if (info_element->data[i] &
1802                                             RTLLIB_BASIC_RATE_MASK)
1803                                                 network->flags &=
1804                                                     ~NETWORK_HAS_CCK;
1805                                 }
1806
1807                                 if (rtllib_is_cck_rate
1808                                     (info_element->data[i])) {
1809                                         network->flags |= NETWORK_HAS_CCK;
1810                                 }
1811                         }
1812
1813                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
1814                                              rates_str, network->rates_len);
1815                         break;
1816
1817                 case MFIE_TYPE_RATES_EX:
1818                         p = rates_str;
1819                         network->rates_ex_len = min(info_element->len,
1820                                                     MAX_RATES_EX_LENGTH);
1821                         for (i = 0; i < network->rates_ex_len; i++) {
1822                                 network->rates_ex[i] = info_element->data[i];
1823                                 p += snprintf(p, sizeof(rates_str) -
1824                                               (p - rates_str), "%02X ",
1825                                               network->rates[i]);
1826                                 if (rtllib_is_ofdm_rate
1827                                     (info_element->data[i])) {
1828                                         network->flags |= NETWORK_HAS_OFDM;
1829                                         if (info_element->data[i] &
1830                                             RTLLIB_BASIC_RATE_MASK)
1831                                                 network->flags &=
1832                                                     ~NETWORK_HAS_CCK;
1833                                 }
1834                         }
1835
1836                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1837                                              rates_str, network->rates_ex_len);
1838                         break;
1839
1840                 case MFIE_TYPE_DS_SET:
1841                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
1842                                              info_element->data[0]);
1843                         network->channel = info_element->data[0];
1844                         break;
1845
1846                 case MFIE_TYPE_FH_SET:
1847                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
1848                         break;
1849
1850                 case MFIE_TYPE_CF_SET:
1851                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
1852                         break;
1853
1854                 case MFIE_TYPE_TIM:
1855                         if (info_element->len < 4)
1856                                 break;
1857
1858                         network->tim.tim_count = info_element->data[0];
1859                         network->tim.tim_period = info_element->data[1];
1860
1861                         network->dtim_period = info_element->data[1];
1862                         if (ieee->state != RTLLIB_LINKED)
1863                                 break;
1864                         network->last_dtim_sta_time = jiffies;
1865
1866                         network->dtim_data = RTLLIB_DTIM_VALID;
1867
1868
1869                         if (info_element->data[2] & 1)
1870                                 network->dtim_data |= RTLLIB_DTIM_MBCAST;
1871
1872                         offset = (info_element->data[2] >> 1)*2;
1873
1874
1875                         if (ieee->assoc_id < 8*offset ||
1876                             ieee->assoc_id > 8*(offset + info_element->len - 3))
1877                                 break;
1878
1879                         offset = (ieee->assoc_id / 8) - offset;
1880                         if (info_element->data[3 + offset] &
1881                            (1 << (ieee->assoc_id % 8)))
1882                                 network->dtim_data |= RTLLIB_DTIM_UCAST;
1883
1884                         network->listen_interval = network->dtim_period;
1885                         break;
1886
1887                 case MFIE_TYPE_ERP:
1888                         network->erp_value = info_element->data[0];
1889                         network->flags |= NETWORK_HAS_ERP_VALUE;
1890                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1891                                              network->erp_value);
1892                         break;
1893                 case MFIE_TYPE_IBSS_SET:
1894                         network->atim_window = info_element->data[0];
1895                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
1896                                              network->atim_window);
1897                         break;
1898
1899                 case MFIE_TYPE_CHALLENGE:
1900                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
1901                         break;
1902
1903                 case MFIE_TYPE_GENERIC:
1904                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
1905                                              info_element->len);
1906                         if (!rtllib_parse_qos_info_param_IE(info_element,
1907                                                                network))
1908                                 break;
1909                         if (info_element->len >= 4 &&
1910                             info_element->data[0] == 0x00 &&
1911                             info_element->data[1] == 0x50 &&
1912                             info_element->data[2] == 0xf2 &&
1913                             info_element->data[3] == 0x01) {
1914                                 network->wpa_ie_len = min(info_element->len + 2,
1915                                                           MAX_WPA_IE_LEN);
1916                                 memcpy(network->wpa_ie, info_element,
1917                                        network->wpa_ie_len);
1918                                 break;
1919                         }
1920                         if (info_element->len == 7 &&
1921                             info_element->data[0] == 0x00 &&
1922                             info_element->data[1] == 0xe0 &&
1923                             info_element->data[2] == 0x4c &&
1924                             info_element->data[3] == 0x01 &&
1925                             info_element->data[4] == 0x02)
1926                                 network->Turbo_Enable = 1;
1927
1928                         if (tmp_htcap_len == 0) {
1929                                 if (info_element->len >= 4 &&
1930                                    info_element->data[0] == 0x00 &&
1931                                    info_element->data[1] == 0x90 &&
1932                                    info_element->data[2] == 0x4c &&
1933                                    info_element->data[3] == 0x033) {
1934
1935                                                 tmp_htcap_len = min(info_element->len, (u8)MAX_IE_LEN);
1936                                                 if (tmp_htcap_len != 0) {
1937                                                         network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1938                                                         network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf) ?
1939                                                                 sizeof(network->bssht.bdHTCapBuf) : tmp_htcap_len;
1940                                                         memcpy(network->bssht.bdHTCapBuf, info_element->data, network->bssht.bdHTCapLen);
1941                                                 }
1942                                 }
1943                                 if (tmp_htcap_len != 0) {
1944                                         network->bssht.bdSupportHT = true;
1945                                         network->bssht.bdHT1R = ((((struct ht_capab_ele *)(network->bssht.bdHTCapBuf))->MCS[1]) == 0);
1946                                 } else {
1947                                         network->bssht.bdSupportHT = false;
1948                                         network->bssht.bdHT1R = false;
1949                                 }
1950                         }
1951
1952
1953                         if (tmp_htinfo_len == 0) {
1954                                 if (info_element->len >= 4 &&
1955                                     info_element->data[0] == 0x00 &&
1956                                     info_element->data[1] == 0x90 &&
1957                                     info_element->data[2] == 0x4c &&
1958                                     info_element->data[3] == 0x034) {
1959                                         tmp_htinfo_len = min(info_element->len, (u8)MAX_IE_LEN);
1960                                         if (tmp_htinfo_len != 0) {
1961                                                 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1962                                                 if (tmp_htinfo_len) {
1963                                                         network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf) ?
1964                                                                 sizeof(network->bssht.bdHTInfoBuf) : tmp_htinfo_len;
1965                                                         memcpy(network->bssht.bdHTInfoBuf, info_element->data, network->bssht.bdHTInfoLen);
1966                                                 }
1967
1968                                         }
1969
1970                                 }
1971                         }
1972
1973                         if (ieee->aggregation) {
1974                                 if (network->bssht.bdSupportHT) {
1975                                         if (info_element->len >= 4 &&
1976                                             info_element->data[0] == 0x00 &&
1977                                             info_element->data[1] == 0xe0 &&
1978                                             info_element->data[2] == 0x4c &&
1979                                             info_element->data[3] == 0x02) {
1980                                                 ht_realtek_agg_len = min(info_element->len, (u8)MAX_IE_LEN);
1981                                                 memcpy(ht_realtek_agg_buf, info_element->data, info_element->len);
1982                                         }
1983                                         if (ht_realtek_agg_len >= 5) {
1984                                                 network->realtek_cap_exit = true;
1985                                                 network->bssht.bdRT2RTAggregation = true;
1986
1987                                                 if ((ht_realtek_agg_buf[4] == 1) && (ht_realtek_agg_buf[5] & 0x02))
1988                                                         network->bssht.bdRT2RTLongSlotTime = true;
1989
1990                                                 if ((ht_realtek_agg_buf[4] == 1) && (ht_realtek_agg_buf[5] & RT_HT_CAP_USE_92SE))
1991                                                         network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_92SE;
1992                                         }
1993                                 }
1994                                 if (ht_realtek_agg_len >= 5) {
1995                                         if ((ht_realtek_agg_buf[5] & RT_HT_CAP_USE_SOFTAP))
1996                                                 network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_SOFTAP;
1997                                 }
1998                         }
1999
2000                         if ((info_element->len >= 3 &&
2001                              info_element->data[0] == 0x00 &&
2002                              info_element->data[1] == 0x05 &&
2003                              info_element->data[2] == 0xb5) ||
2004                              (info_element->len >= 3 &&
2005                              info_element->data[0] == 0x00 &&
2006                              info_element->data[1] == 0x0a &&
2007                              info_element->data[2] == 0xf7) ||
2008                              (info_element->len >= 3 &&
2009                              info_element->data[0] == 0x00 &&
2010                              info_element->data[1] == 0x10 &&
2011                              info_element->data[2] == 0x18)) {
2012                                 network->broadcom_cap_exist = true;
2013                         }
2014                         if (info_element->len >= 3 &&
2015                             info_element->data[0] == 0x00 &&
2016                             info_element->data[1] == 0x0c &&
2017                             info_element->data[2] == 0x43)
2018                                 network->ralink_cap_exist = true;
2019                         if ((info_element->len >= 3 &&
2020                              info_element->data[0] == 0x00 &&
2021                              info_element->data[1] == 0x03 &&
2022                              info_element->data[2] == 0x7f) ||
2023                              (info_element->len >= 3 &&
2024                              info_element->data[0] == 0x00 &&
2025                              info_element->data[1] == 0x13 &&
2026                              info_element->data[2] == 0x74))
2027                                 network->atheros_cap_exist = true;
2028
2029                         if ((info_element->len >= 3 &&
2030                              info_element->data[0] == 0x00 &&
2031                              info_element->data[1] == 0x50 &&
2032                              info_element->data[2] == 0x43))
2033                                 network->marvell_cap_exist = true;
2034                         if (info_element->len >= 3 &&
2035                             info_element->data[0] == 0x00 &&
2036                             info_element->data[1] == 0x40 &&
2037                             info_element->data[2] == 0x96)
2038                                 network->cisco_cap_exist = true;
2039
2040
2041                         if (info_element->len >= 3 &&
2042                             info_element->data[0] == 0x00 &&
2043                             info_element->data[1] == 0x0a &&
2044                             info_element->data[2] == 0xf5)
2045                                 network->airgo_cap_exist = true;
2046
2047                         if (info_element->len > 4 &&
2048                             info_element->data[0] == 0x00 &&
2049                             info_element->data[1] == 0x40 &&
2050                             info_element->data[2] == 0x96 &&
2051                             info_element->data[3] == 0x01) {
2052                                 if (info_element->len == 6) {
2053                                         memcpy(network->CcxRmState, &info_element[4], 2);
2054                                         if (network->CcxRmState[0] != 0)
2055                                                 network->bCcxRmEnable = true;
2056                                         else
2057                                                 network->bCcxRmEnable = false;
2058                                         network->MBssidMask = network->CcxRmState[1] & 0x07;
2059                                         if (network->MBssidMask != 0) {
2060                                                 network->bMBssidValid = true;
2061                                                 network->MBssidMask = 0xff << (network->MBssidMask);
2062                                                 memcpy(network->MBssid, network->bssid, ETH_ALEN);
2063                                                 network->MBssid[5] &= network->MBssidMask;
2064                                         } else {
2065                                                 network->bMBssidValid = false;
2066                                         }
2067                                 } else {
2068                                         network->bCcxRmEnable = false;
2069                                 }
2070                         }
2071                         if (info_element->len > 4  &&
2072                             info_element->data[0] == 0x00 &&
2073                             info_element->data[1] == 0x40 &&
2074                             info_element->data[2] == 0x96 &&
2075                             info_element->data[3] == 0x03) {
2076                                 if (info_element->len == 5) {
2077                                         network->bWithCcxVerNum = true;
2078                                         network->BssCcxVerNumber = info_element->data[4];
2079                                 } else {
2080                                         network->bWithCcxVerNum = false;
2081                                         network->BssCcxVerNumber = 0;
2082                                 }
2083                         }
2084                         if (info_element->len > 4  &&
2085                             info_element->data[0] == 0x00 &&
2086                             info_element->data[1] == 0x50 &&
2087                             info_element->data[2] == 0xf2 &&
2088                             info_element->data[3] == 0x04) {
2089                                 RTLLIB_DEBUG_MGMT("MFIE_TYPE_WZC: %d bytes\n",
2090                                                      info_element->len);
2091                                 network->wzc_ie_len = min(info_element->len+2,
2092                                                           MAX_WZC_IE_LEN);
2093                                 memcpy(network->wzc_ie, info_element,
2094                                                 network->wzc_ie_len);
2095                         }
2096                         break;
2097
2098                 case MFIE_TYPE_RSN:
2099                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
2100                                              info_element->len);
2101                         network->rsn_ie_len = min(info_element->len + 2,
2102                                                   MAX_WPA_IE_LEN);
2103                         memcpy(network->rsn_ie, info_element,
2104                                network->rsn_ie_len);
2105                         break;
2106
2107                 case MFIE_TYPE_HT_CAP:
2108                         RTLLIB_DEBUG_SCAN("MFIE_TYPE_HT_CAP: %d bytes\n",
2109                                              info_element->len);
2110                         tmp_htcap_len = min(info_element->len, (u8)MAX_IE_LEN);
2111                         if (tmp_htcap_len != 0) {
2112                                 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
2113                                 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf) ?
2114                                         sizeof(network->bssht.bdHTCapBuf) : tmp_htcap_len;
2115                                 memcpy(network->bssht.bdHTCapBuf,
2116                                        info_element->data,
2117                                        network->bssht.bdHTCapLen);
2118
2119                                 network->bssht.bdSupportHT = true;
2120                                 network->bssht.bdHT1R = ((((struct ht_capab_ele *)
2121                                                         network->bssht.bdHTCapBuf))->MCS[1]) == 0;
2122
2123                                 network->bssht.bdBandWidth = (enum ht_channel_width)
2124                                                              (((struct ht_capab_ele *)
2125                                                              (network->bssht.bdHTCapBuf))->ChlWidth);
2126                         } else {
2127                                 network->bssht.bdSupportHT = false;
2128                                 network->bssht.bdHT1R = false;
2129                                 network->bssht.bdBandWidth = HT_CHANNEL_WIDTH_20;
2130                         }
2131                         break;
2132
2133
2134                 case MFIE_TYPE_HT_INFO:
2135                         RTLLIB_DEBUG_SCAN("MFIE_TYPE_HT_INFO: %d bytes\n",
2136                                              info_element->len);
2137                         tmp_htinfo_len = min(info_element->len, (u8)MAX_IE_LEN);
2138                         if (tmp_htinfo_len) {
2139                                 network->bssht.bdHTSpecVer = HT_SPEC_VER_IEEE;
2140                                 network->bssht.bdHTInfoLen = tmp_htinfo_len >
2141                                         sizeof(network->bssht.bdHTInfoBuf) ?
2142                                         sizeof(network->bssht.bdHTInfoBuf) :
2143                                         tmp_htinfo_len;
2144                                 memcpy(network->bssht.bdHTInfoBuf,
2145                                        info_element->data,
2146                                        network->bssht.bdHTInfoLen);
2147                         }
2148                         break;
2149
2150                 case MFIE_TYPE_AIRONET:
2151                         RTLLIB_DEBUG_SCAN("MFIE_TYPE_AIRONET: %d bytes\n",
2152                                              info_element->len);
2153                         if (info_element->len > IE_CISCO_FLAG_POSITION) {
2154                                 network->bWithAironetIE = true;
2155
2156                                 if ((info_element->data[IE_CISCO_FLAG_POSITION]
2157                                      & SUPPORT_CKIP_MIC) ||
2158                                      (info_element->data[IE_CISCO_FLAG_POSITION]
2159                                      & SUPPORT_CKIP_PK))
2160                                         network->bCkipSupported = true;
2161                                 else
2162                                         network->bCkipSupported = false;
2163                         } else {
2164                                 network->bWithAironetIE = false;
2165                                 network->bCkipSupported = false;
2166                         }
2167                         break;
2168                 case MFIE_TYPE_QOS_PARAMETER:
2169                         printk(KERN_ERR
2170                                "QoS Error need to parse QOS_PARAMETER IE\n");
2171                         break;
2172
2173                 case MFIE_TYPE_COUNTRY:
2174                         RTLLIB_DEBUG_SCAN("MFIE_TYPE_COUNTRY: %d bytes\n",
2175                                              info_element->len);
2176                         rtllib_extract_country_ie(ieee, info_element, network,
2177                                                   network->bssid);
2178                         break;
2179 /* TODO */
2180                 default:
2181                         RTLLIB_DEBUG_MGMT
2182                             ("Unsupported info element: %s (%d)\n",
2183                              get_info_element_string(info_element->id),
2184                              info_element->id);
2185                         break;
2186                 }
2187
2188                 length -= sizeof(*info_element) + info_element->len;
2189                 info_element =
2190                     (struct rtllib_info_element *)&info_element->
2191                     data[info_element->len];
2192         }
2193
2194         if (!network->atheros_cap_exist && !network->broadcom_cap_exist &&
2195             !network->cisco_cap_exist && !network->ralink_cap_exist &&
2196             !network->bssht.bdRT2RTAggregation)
2197                 network->unknown_cap_exist = true;
2198         else
2199                 network->unknown_cap_exist = false;
2200         return 0;
2201 }
2202
2203 static inline u8 rtllib_SignalStrengthTranslate(u8  CurrSS)
2204 {
2205         u8 RetSS;
2206
2207         if (CurrSS >= 71 && CurrSS <= 100)
2208                 RetSS = 90 + ((CurrSS - 70) / 3);
2209         else if (CurrSS >= 41 && CurrSS <= 70)
2210                 RetSS = 78 + ((CurrSS - 40) / 3);
2211         else if (CurrSS >= 31 && CurrSS <= 40)
2212                 RetSS = 66 + (CurrSS - 30);
2213         else if (CurrSS >= 21 && CurrSS <= 30)
2214                 RetSS = 54 + (CurrSS - 20);
2215         else if (CurrSS >= 5 && CurrSS <= 20)
2216                 RetSS = 42 + (((CurrSS - 5) * 2) / 3);
2217         else if (CurrSS == 4)
2218                 RetSS = 36;
2219         else if (CurrSS == 3)
2220                 RetSS = 27;
2221         else if (CurrSS == 2)
2222                 RetSS = 18;
2223         else if (CurrSS == 1)
2224                 RetSS = 9;
2225         else
2226                 RetSS = CurrSS;
2227
2228         return RetSS;
2229 }
2230
2231 static long rtllib_translate_todbm(u8 signal_strength_index)
2232 {
2233         long    signal_power;
2234
2235         signal_power = (long)((signal_strength_index + 1) >> 1);
2236         signal_power -= 95;
2237
2238         return signal_power;
2239 }
2240
2241 static inline int rtllib_network_init(
2242         struct rtllib_device *ieee,
2243         struct rtllib_probe_response *beacon,
2244         struct rtllib_network *network,
2245         struct rtllib_rx_stats *stats)
2246 {
2247
2248         /*
2249         network->qos_data.active = 0;
2250         network->qos_data.supported = 0;
2251         network->qos_data.param_count = 0;
2252         network->qos_data.old_param_count = 0;
2253         */
2254         memset(&network->qos_data, 0, sizeof(struct rtllib_qos_data));
2255
2256         /* Pull out fixed field data */
2257         memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
2258         network->capability = le16_to_cpu(beacon->capability);
2259         network->last_scanned = jiffies;
2260         network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
2261         network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
2262         network->beacon_interval = le32_to_cpu(beacon->beacon_interval);
2263         /* Where to pull this? beacon->listen_interval;*/
2264         network->listen_interval = 0x0A;
2265         network->rates_len = network->rates_ex_len = 0;
2266         network->last_associate = 0;
2267         network->ssid_len = 0;
2268         network->hidden_ssid_len = 0;
2269         memset(network->hidden_ssid, 0, sizeof(network->hidden_ssid));
2270         network->flags = 0;
2271         network->atim_window = 0;
2272         network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
2273             0x3 : 0x0;
2274         network->berp_info_valid = false;
2275         network->broadcom_cap_exist = false;
2276         network->ralink_cap_exist = false;
2277         network->atheros_cap_exist = false;
2278         network->cisco_cap_exist = false;
2279         network->unknown_cap_exist = false;
2280         network->realtek_cap_exit = false;
2281         network->marvell_cap_exist = false;
2282         network->airgo_cap_exist = false;
2283         network->Turbo_Enable = 0;
2284         network->SignalStrength = stats->SignalStrength;
2285         network->RSSI = stats->SignalStrength;
2286         network->CountryIeLen = 0;
2287         memset(network->CountryIeBuf, 0, MAX_IE_LEN);
2288         HTInitializeBssDesc(&network->bssht);
2289         if (stats->freq == RTLLIB_52GHZ_BAND) {
2290                 /* for A band (No DS info) */
2291                 network->channel = stats->received_channel;
2292         } else
2293                 network->flags |= NETWORK_HAS_CCK;
2294
2295         network->wpa_ie_len = 0;
2296         network->rsn_ie_len = 0;
2297         network->wzc_ie_len = 0;
2298
2299         if (rtllib_parse_info_param(ieee,
2300                         beacon->info_element,
2301                         (stats->len - sizeof(*beacon)),
2302                         network,
2303                         stats))
2304                 return 1;
2305
2306         network->mode = 0;
2307         if (stats->freq == RTLLIB_52GHZ_BAND)
2308                 network->mode = IEEE_A;
2309         else {
2310                 if (network->flags & NETWORK_HAS_OFDM)
2311                         network->mode |= IEEE_G;
2312                 if (network->flags & NETWORK_HAS_CCK)
2313                         network->mode |= IEEE_B;
2314         }
2315
2316         if (network->mode == 0) {
2317                 RTLLIB_DEBUG_SCAN("Filtered out '%s (%pM)' "
2318                                      "network.\n",
2319                                      escape_essid(network->ssid,
2320                                                   network->ssid_len),
2321                                      network->bssid);
2322                 return 1;
2323         }
2324
2325         if (network->bssht.bdSupportHT) {
2326                 if (network->mode == IEEE_A)
2327                         network->mode = IEEE_N_5G;
2328                 else if (network->mode & (IEEE_G | IEEE_B))
2329                         network->mode = IEEE_N_24G;
2330         }
2331         if (rtllib_is_empty_essid(network->ssid, network->ssid_len))
2332                 network->flags |= NETWORK_EMPTY_ESSID;
2333         stats->signal = 30 + (stats->SignalStrength * 70) / 100;
2334         stats->noise = rtllib_translate_todbm((u8)(100-stats->signal)) - 25;
2335
2336         memcpy(&network->stats, stats, sizeof(network->stats));
2337
2338         return 0;
2339 }
2340
2341 static inline int is_same_network(struct rtllib_network *src,
2342                                   struct rtllib_network *dst, u8 ssidbroad)
2343 {
2344         /* A network is only a duplicate if the channel, BSSID, ESSID
2345          * and the capability field (in particular IBSS and BSS) all match.
2346          * We treat all <hidden> with the same BSSID and channel
2347          * as one network */
2348         return (((src->ssid_len == dst->ssid_len) || (!ssidbroad)) &&
2349                 (src->channel == dst->channel) &&
2350                 !memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
2351                 (!memcmp(src->ssid, dst->ssid, src->ssid_len) ||
2352                 (!ssidbroad)) &&
2353                 ((src->capability & WLAN_CAPABILITY_IBSS) ==
2354                 (dst->capability & WLAN_CAPABILITY_IBSS)) &&
2355                 ((src->capability & WLAN_CAPABILITY_ESS) ==
2356                 (dst->capability & WLAN_CAPABILITY_ESS)));
2357 }
2358
2359 static inline void update_ibss_network(struct rtllib_network *dst,
2360                                   struct rtllib_network *src)
2361 {
2362         memcpy(&dst->stats, &src->stats, sizeof(struct rtllib_rx_stats));
2363         dst->last_scanned = jiffies;
2364 }
2365
2366
2367 static inline void update_network(struct rtllib_network *dst,
2368                                   struct rtllib_network *src)
2369 {
2370         int qos_active;
2371         u8 old_param;
2372
2373         memcpy(&dst->stats, &src->stats, sizeof(struct rtllib_rx_stats));
2374         dst->capability = src->capability;
2375         memcpy(dst->rates, src->rates, src->rates_len);
2376         dst->rates_len = src->rates_len;
2377         memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
2378         dst->rates_ex_len = src->rates_ex_len;
2379         if (src->ssid_len > 0) {
2380                 if (dst->ssid_len == 0) {
2381                         memset(dst->hidden_ssid, 0, sizeof(dst->hidden_ssid));
2382                         dst->hidden_ssid_len = src->ssid_len;
2383                         memcpy(dst->hidden_ssid, src->ssid, src->ssid_len);
2384                 } else {
2385                         memset(dst->ssid, 0, dst->ssid_len);
2386                         dst->ssid_len = src->ssid_len;
2387                         memcpy(dst->ssid, src->ssid, src->ssid_len);
2388                 }
2389         }
2390         dst->mode = src->mode;
2391         dst->flags = src->flags;
2392         dst->time_stamp[0] = src->time_stamp[0];
2393         dst->time_stamp[1] = src->time_stamp[1];
2394         if (src->flags & NETWORK_HAS_ERP_VALUE) {
2395                 dst->erp_value = src->erp_value;
2396                 dst->berp_info_valid = src->berp_info_valid = true;
2397         }
2398         dst->beacon_interval = src->beacon_interval;
2399         dst->listen_interval = src->listen_interval;
2400         dst->atim_window = src->atim_window;
2401         dst->dtim_period = src->dtim_period;
2402         dst->dtim_data = src->dtim_data;
2403         dst->last_dtim_sta_time = src->last_dtim_sta_time;
2404         memcpy(&dst->tim, &src->tim, sizeof(struct rtllib_tim_parameters));
2405
2406         dst->bssht.bdSupportHT = src->bssht.bdSupportHT;
2407         dst->bssht.bdRT2RTAggregation = src->bssht.bdRT2RTAggregation;
2408         dst->bssht.bdHTCapLen = src->bssht.bdHTCapLen;
2409         memcpy(dst->bssht.bdHTCapBuf, src->bssht.bdHTCapBuf,
2410                src->bssht.bdHTCapLen);
2411         dst->bssht.bdHTInfoLen = src->bssht.bdHTInfoLen;
2412         memcpy(dst->bssht.bdHTInfoBuf, src->bssht.bdHTInfoBuf,
2413                src->bssht.bdHTInfoLen);
2414         dst->bssht.bdHTSpecVer = src->bssht.bdHTSpecVer;
2415         dst->bssht.bdRT2RTLongSlotTime = src->bssht.bdRT2RTLongSlotTime;
2416         dst->broadcom_cap_exist = src->broadcom_cap_exist;
2417         dst->ralink_cap_exist = src->ralink_cap_exist;
2418         dst->atheros_cap_exist = src->atheros_cap_exist;
2419         dst->realtek_cap_exit = src->realtek_cap_exit;
2420         dst->marvell_cap_exist = src->marvell_cap_exist;
2421         dst->cisco_cap_exist = src->cisco_cap_exist;
2422         dst->airgo_cap_exist = src->airgo_cap_exist;
2423         dst->unknown_cap_exist = src->unknown_cap_exist;
2424         memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
2425         dst->wpa_ie_len = src->wpa_ie_len;
2426         memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
2427         dst->rsn_ie_len = src->rsn_ie_len;
2428         memcpy(dst->wzc_ie, src->wzc_ie, src->wzc_ie_len);
2429         dst->wzc_ie_len = src->wzc_ie_len;
2430
2431         dst->last_scanned = jiffies;
2432         /* qos related parameters */
2433         qos_active = dst->qos_data.active;
2434         old_param = dst->qos_data.param_count;
2435         dst->qos_data.supported = src->qos_data.supported;
2436         if (dst->flags & NETWORK_HAS_QOS_PARAMETERS)
2437                 memcpy(&dst->qos_data, &src->qos_data,
2438                        sizeof(struct rtllib_qos_data));
2439         if (dst->qos_data.supported == 1) {
2440                 if (dst->ssid_len)
2441                         RTLLIB_DEBUG_QOS
2442                                 ("QoS the network %s is QoS supported\n",
2443                                 dst->ssid);
2444                 else
2445                         RTLLIB_DEBUG_QOS
2446                                 ("QoS the network is QoS supported\n");
2447         }
2448         dst->qos_data.active = qos_active;
2449         dst->qos_data.old_param_count = old_param;
2450
2451         /* dst->last_associate is not overwritten */
2452         dst->wmm_info = src->wmm_info;
2453         if (src->wmm_param[0].ac_aci_acm_aifsn ||
2454            src->wmm_param[1].ac_aci_acm_aifsn ||
2455            src->wmm_param[2].ac_aci_acm_aifsn ||
2456            src->wmm_param[3].ac_aci_acm_aifsn)
2457                 memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN);
2458
2459         dst->SignalStrength = src->SignalStrength;
2460         dst->RSSI = src->RSSI;
2461         dst->Turbo_Enable = src->Turbo_Enable;
2462
2463         dst->CountryIeLen = src->CountryIeLen;
2464         memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen);
2465
2466         dst->bWithAironetIE = src->bWithAironetIE;
2467         dst->bCkipSupported = src->bCkipSupported;
2468         memcpy(dst->CcxRmState, src->CcxRmState, 2);
2469         dst->bCcxRmEnable = src->bCcxRmEnable;
2470         dst->MBssidMask = src->MBssidMask;
2471         dst->bMBssidValid = src->bMBssidValid;
2472         memcpy(dst->MBssid, src->MBssid, 6);
2473         dst->bWithCcxVerNum = src->bWithCcxVerNum;
2474         dst->BssCcxVerNumber = src->BssCcxVerNumber;
2475 }
2476
2477 static inline int is_beacon(__le16 fc)
2478 {
2479         return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == RTLLIB_STYPE_BEACON);
2480 }
2481
2482 static int IsPassiveChannel(struct rtllib_device *rtllib, u8 channel)
2483 {
2484         if (MAX_CHANNEL_NUMBER < channel) {
2485                 printk(KERN_INFO "%s(): Invalid Channel\n", __func__);
2486                 return 0;
2487         }
2488
2489         if (rtllib->active_channel_map[channel] == 2)
2490                 return 1;
2491
2492         return 0;
2493 }
2494
2495 int rtllib_legal_channel(struct rtllib_device *rtllib, u8 channel)
2496 {
2497         if (MAX_CHANNEL_NUMBER < channel) {
2498                 printk(KERN_INFO "%s(): Invalid Channel\n", __func__);
2499                 return 0;
2500         }
2501         if (rtllib->active_channel_map[channel] > 0)
2502                 return 1;
2503
2504         return 0;
2505 }
2506 EXPORT_SYMBOL(rtllib_legal_channel);
2507
2508 static inline void rtllib_process_probe_response(
2509         struct rtllib_device *ieee,
2510         struct rtllib_probe_response *beacon,
2511         struct rtllib_rx_stats *stats)
2512 {
2513         struct rtllib_network *target;
2514         struct rtllib_network *oldest = NULL;
2515         struct rtllib_info_element *info_element = &beacon->info_element[0];
2516         unsigned long flags;
2517         short renew;
2518         struct rtllib_network *network = kzalloc(sizeof(struct rtllib_network),
2519                                                  GFP_ATOMIC);
2520
2521         if (!network)
2522                 return;
2523
2524         RTLLIB_DEBUG_SCAN(
2525                 "'%s' ( %pM ): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
2526                 escape_essid(info_element->data, info_element->len),
2527                 beacon->header.addr3,
2528                 (beacon->capability & (1<<0xf)) ? '1' : '0',
2529                 (beacon->capability & (1<<0xe)) ? '1' : '0',
2530                 (beacon->capability & (1<<0xd)) ? '1' : '0',
2531                 (beacon->capability & (1<<0xc)) ? '1' : '0',
2532                 (beacon->capability & (1<<0xb)) ? '1' : '0',
2533                 (beacon->capability & (1<<0xa)) ? '1' : '0',
2534                 (beacon->capability & (1<<0x9)) ? '1' : '0',
2535                 (beacon->capability & (1<<0x8)) ? '1' : '0',
2536                 (beacon->capability & (1<<0x7)) ? '1' : '0',
2537                 (beacon->capability & (1<<0x6)) ? '1' : '0',
2538                 (beacon->capability & (1<<0x5)) ? '1' : '0',
2539                 (beacon->capability & (1<<0x4)) ? '1' : '0',
2540                 (beacon->capability & (1<<0x3)) ? '1' : '0',
2541                 (beacon->capability & (1<<0x2)) ? '1' : '0',
2542                 (beacon->capability & (1<<0x1)) ? '1' : '0',
2543                 (beacon->capability & (1<<0x0)) ? '1' : '0');
2544
2545         if (rtllib_network_init(ieee, beacon, network, stats)) {
2546                 RTLLIB_DEBUG_SCAN("Dropped '%s' ( %pM) via %s.\n",
2547                                   escape_essid(info_element->data,
2548                                   info_element->len),
2549                                   beacon->header.addr3,
2550                                   WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
2551                                   RTLLIB_STYPE_PROBE_RESP ?
2552                                   "PROBE RESPONSE" : "BEACON");
2553                 goto free_network;
2554         }
2555
2556
2557         if (!rtllib_legal_channel(ieee, network->channel))
2558                 goto free_network;
2559
2560         if (WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
2561             RTLLIB_STYPE_PROBE_RESP) {
2562                 if (IsPassiveChannel(ieee, network->channel)) {
2563                         printk(KERN_INFO "GetScanInfo(): For Global Domain, "
2564                                "filter probe response at channel(%d).\n",
2565                                network->channel);
2566                         goto free_network;
2567                 }
2568         }
2569
2570         /* The network parsed correctly -- so now we scan our known networks
2571          * to see if we can find it in our list.
2572          *
2573          * NOTE:  This search is definitely not optimized.  Once its doing
2574          *      the "right thing" we'll optimize it for efficiency if
2575          *      necessary */
2576
2577         /* Search for this entry in the list and update it if it is
2578          * already there. */
2579
2580         spin_lock_irqsave(&ieee->lock, flags);
2581         if (is_same_network(&ieee->current_network, network,
2582            (network->ssid_len ? 1 : 0))) {
2583                 update_network(&ieee->current_network, network);
2584                 if ((ieee->current_network.mode == IEEE_N_24G ||
2585                      ieee->current_network.mode == IEEE_G)
2586                      && ieee->current_network.berp_info_valid) {
2587                         if (ieee->current_network.erp_value & ERP_UseProtection)
2588                                 ieee->current_network.buseprotection = true;
2589                         else
2590                                 ieee->current_network.buseprotection = false;
2591                 }
2592                 if (is_beacon(beacon->header.frame_ctl)) {
2593                         if (ieee->state >= RTLLIB_LINKED)
2594                                 ieee->LinkDetectInfo.NumRecvBcnInPeriod++;
2595                 }
2596         }
2597         list_for_each_entry(target, &ieee->network_list, list) {
2598                 if (is_same_network(target, network,
2599                    (target->ssid_len ? 1 : 0)))
2600                         break;
2601                 if ((oldest == NULL) ||
2602                     (target->last_scanned < oldest->last_scanned))
2603                         oldest = target;
2604         }
2605
2606         /* If we didn't find a match, then get a new network slot to initialize
2607          * with this beacon's information */
2608         if (&target->list == &ieee->network_list) {
2609                 if (list_empty(&ieee->network_free_list)) {
2610                         /* If there are no more slots, expire the oldest */
2611                         list_del(&oldest->list);
2612                         target = oldest;
2613                         RTLLIB_DEBUG_SCAN("Expired '%s' ( %pM) from "
2614                                              "network list.\n",
2615                                              escape_essid(target->ssid,
2616                                                           target->ssid_len),
2617                                              target->bssid);
2618                 } else {
2619                         /* Otherwise just pull from the free list */
2620                         target = list_entry(ieee->network_free_list.next,
2621                                             struct rtllib_network, list);
2622                         list_del(ieee->network_free_list.next);
2623                 }
2624
2625
2626                 RTLLIB_DEBUG_SCAN("Adding '%s' ( %pM) via %s.\n",
2627                                   escape_essid(network->ssid,
2628                                   network->ssid_len), network->bssid,
2629                                   WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
2630                                   RTLLIB_STYPE_PROBE_RESP ?
2631                                   "PROBE RESPONSE" : "BEACON");
2632                 memcpy(target, network, sizeof(*target));
2633                 list_add_tail(&target->list, &ieee->network_list);
2634                 if (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)
2635                         rtllib_softmac_new_net(ieee, network);
2636         } else {
2637                 RTLLIB_DEBUG_SCAN("Updating '%s' ( %pM) via %s.\n",
2638                                   escape_essid(target->ssid,
2639                                   target->ssid_len), target->bssid,
2640                                   WLAN_FC_GET_STYPE(beacon->header.frame_ctl) ==
2641                                   RTLLIB_STYPE_PROBE_RESP ?
2642                                   "PROBE RESPONSE" : "BEACON");
2643
2644                 /* we have an entry and we are going to update it. But this
2645                  *  entry may be already expired. In this case we do the same
2646                  * as we found a new net and call the new_net handler
2647                  */
2648                 renew = !time_after(target->last_scanned + ieee->scan_age,
2649                                     jiffies);
2650                 if ((!target->ssid_len) &&
2651                     (((network->ssid_len > 0) && (target->hidden_ssid_len == 0))
2652                     || ((ieee->current_network.ssid_len == network->ssid_len) &&
2653                     (strncmp(ieee->current_network.ssid, network->ssid,
2654                     network->ssid_len) == 0) &&
2655                     (ieee->state == RTLLIB_NOLINK))))
2656                         renew = 1;
2657                 update_network(target, network);
2658                 if (renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE))
2659                         rtllib_softmac_new_net(ieee, network);
2660         }
2661
2662         spin_unlock_irqrestore(&ieee->lock, flags);
2663         if (is_beacon(beacon->header.frame_ctl) &&
2664             is_same_network(&ieee->current_network, network,
2665             (network->ssid_len ? 1 : 0)) &&
2666             (ieee->state == RTLLIB_LINKED)) {
2667                 if (ieee->handle_beacon != NULL)
2668                         ieee->handle_beacon(ieee->dev, beacon,
2669                                             &ieee->current_network);
2670         }
2671 free_network:
2672         kfree(network);
2673         return;
2674 }
2675
2676 void rtllib_rx_mgt(struct rtllib_device *ieee,
2677                       struct sk_buff *skb,
2678                       struct rtllib_rx_stats *stats)
2679 {
2680         struct rtllib_hdr_4addr *header = (struct rtllib_hdr_4addr *)skb->data ;
2681
2682         if (WLAN_FC_GET_STYPE(header->frame_ctl) != RTLLIB_STYPE_PROBE_RESP &&
2683             WLAN_FC_GET_STYPE(header->frame_ctl) != RTLLIB_STYPE_BEACON)
2684                 ieee->last_rx_ps_time = jiffies;
2685
2686         switch (WLAN_FC_GET_STYPE(header->frame_ctl)) {
2687
2688         case RTLLIB_STYPE_BEACON:
2689                 RTLLIB_DEBUG_MGMT("received BEACON (%d)\n",
2690                                   WLAN_FC_GET_STYPE(header->frame_ctl));
2691                 RTLLIB_DEBUG_SCAN("Beacon\n");
2692                 rtllib_process_probe_response(
2693                                 ieee, (struct rtllib_probe_response *)header,
2694                                 stats);
2695
2696                 if (ieee->sta_sleep || (ieee->ps != RTLLIB_PS_DISABLED &&
2697                     ieee->iw_mode == IW_MODE_INFRA &&
2698                     ieee->state == RTLLIB_LINKED))
2699                         tasklet_schedule(&ieee->ps_task);
2700
2701                 break;
2702
2703         case RTLLIB_STYPE_PROBE_RESP:
2704                 RTLLIB_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
2705                         WLAN_FC_GET_STYPE(header->frame_ctl));
2706                 RTLLIB_DEBUG_SCAN("Probe response\n");
2707                 rtllib_process_probe_response(ieee,
2708                               (struct rtllib_probe_response *)header, stats);
2709                 break;
2710         case RTLLIB_STYPE_PROBE_REQ:
2711                 RTLLIB_DEBUG_MGMT("received PROBE RESQUEST (%d)\n",
2712                                   WLAN_FC_GET_STYPE(header->frame_ctl));
2713                 RTLLIB_DEBUG_SCAN("Probe request\n");
2714                 if ((ieee->softmac_features & IEEE_SOFTMAC_PROBERS) &&
2715                     ((ieee->iw_mode == IW_MODE_ADHOC ||
2716                     ieee->iw_mode == IW_MODE_MASTER) &&
2717                     ieee->state == RTLLIB_LINKED))
2718                         rtllib_rx_probe_rq(ieee, skb);
2719                 break;
2720         }
2721 }