drivers/staging/rtl8192u/ieee80211/ieee80211_rx.c

   1 /*
   2  * Original code based Host AP (software wireless LAN access point) driver
   3  * for Intersil Prism2/2.5/3 - hostap.o module, common routines
   4  *
   5  * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
   6  * <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 <andrea.merello@gmail.com>
  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 "ieee80211.h"
  45 #include "dot11d.h"
  46 static inline void ieee80211_monitor_rx(struct ieee80211_device *ieee,
  47                                         struct sk_buff *skb,
  48                                         struct ieee80211_rx_stats *rx_stats)
  49 {
  50         struct rtl_80211_hdr_4addr *hdr = (struct rtl_80211_hdr_4addr *)skb->data;
  51         u16 fc = le16_to_cpu(hdr->frame_ctl);
  52
  53         skb->dev = ieee->dev;
  54         skb_reset_mac_header(skb);
  55
  56         skb_pull(skb, ieee80211_get_hdrlen(fc));
  57         skb->pkt_type = PACKET_OTHERHOST;
  58         skb->protocol = htons(ETH_P_80211_RAW);
  59         memset(skb->cb, 0, sizeof(skb->cb));
  60         netif_rx(skb);
  61 }
  62
  63
  64 /* Called only as a tasklet (software IRQ) */
  65 static struct ieee80211_frag_entry *
  66 ieee80211_frag_cache_find(struct ieee80211_device *ieee, unsigned int seq,
  67                           unsigned int frag, u8 tid, u8 *src, u8 *dst)
  68 {
  69         struct ieee80211_frag_entry *entry;
  70         int i;
  71
  72         for (i = 0; i < IEEE80211_FRAG_CACHE_LEN; i++) {
  73                 entry = &ieee->frag_cache[tid][i];
  74                 if (entry->skb != NULL &&
  75                     time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
  76                         IEEE80211_DEBUG_FRAG(
  77                                 "expiring fragment cache entry "
  78                                 "seq=%u last_frag=%u\n",
  79                                 entry->seq, entry->last_frag);
  80                         dev_kfree_skb_any(entry->skb);
  81                         entry->skb = NULL;
  82                 }
  83
  84                 if (entry->skb != NULL && entry->seq == seq &&
  85                     (entry->last_frag + 1 == frag || frag == -1) &&
  86                     memcmp(entry->src_addr, src, ETH_ALEN) == 0 &&
  87                     memcmp(entry->dst_addr, dst, ETH_ALEN) == 0)
  88                         return entry;
  89         }
  90
  91         return NULL;
  92 }
  93
  94 /* Called only as a tasklet (software IRQ) */
  95 static struct sk_buff *
  96 ieee80211_frag_cache_get(struct ieee80211_device *ieee,
  97                          struct rtl_80211_hdr_4addr *hdr)
  98 {
  99         struct sk_buff *skb = NULL;
 100         u16 fc = le16_to_cpu(hdr->frame_ctl);
 101         u16 sc = le16_to_cpu(hdr->seq_ctl);
 102         unsigned int frag = WLAN_GET_SEQ_FRAG(sc);
 103         unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
 104         struct ieee80211_frag_entry *entry;
 105         struct rtl_80211_hdr_3addrqos *hdr_3addrqos;
 106         struct rtl_80211_hdr_4addrqos *hdr_4addrqos;
 107         u8 tid;
 108
 109         if (((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) {
 110           hdr_4addrqos = (struct rtl_80211_hdr_4addrqos *)hdr;
 111           tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QCTL_TID;
 112           tid = UP2AC(tid);
 113           tid ++;
 114         } else if (IEEE80211_QOS_HAS_SEQ(fc)) {
 115           hdr_3addrqos = (struct rtl_80211_hdr_3addrqos *)hdr;
 116           tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QCTL_TID;
 117           tid = UP2AC(tid);
 118           tid ++;
 119         } else {
 120           tid = 0;
 121         }
 122
 123         if (frag == 0) {
 124                 /* Reserve enough space to fit maximum frame length */
 125                 skb = dev_alloc_skb(ieee->dev->mtu +
 126                                     sizeof(struct rtl_80211_hdr_4addr) +
 127                                     8 /* LLC */ +
 128                                     2 /* alignment */ +
 129                                     8 /* WEP */ +
 130                                     ETH_ALEN /* WDS */ +
 131                                     (IEEE80211_QOS_HAS_SEQ(fc)?2:0) /* QOS Control */);
 132                 if (!skb)
 133                         return NULL;
 134
 135                 entry = &ieee->frag_cache[tid][ieee->frag_next_idx[tid]];
 136                 ieee->frag_next_idx[tid]++;
 137                 if (ieee->frag_next_idx[tid] >= IEEE80211_FRAG_CACHE_LEN)
 138                         ieee->frag_next_idx[tid] = 0;
 139
 140                 if (entry->skb != NULL)
 141                         dev_kfree_skb_any(entry->skb);
 142
 143                 entry->first_frag_time = jiffies;
 144                 entry->seq = seq;
 145                 entry->last_frag = frag;
 146                 entry->skb = skb;
 147                 memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
 148                 memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
 149         } else {
 150                 /* received a fragment of a frame for which the head fragment
 151                  * should have already been received */
 152                 entry = ieee80211_frag_cache_find(ieee, seq, frag, tid,hdr->addr2,
 153                                                   hdr->addr1);
 154                 if (entry != NULL) {
 155                         entry->last_frag = frag;
 156                         skb = entry->skb;
 157                 }
 158         }
 159
 160         return skb;
 161 }
 162
 163
 164 /* Called only as a tasklet (software IRQ) */
 165 static int ieee80211_frag_cache_invalidate(struct ieee80211_device *ieee,
 166                                            struct rtl_80211_hdr_4addr *hdr)
 167 {
 168         u16 fc = le16_to_cpu(hdr->frame_ctl);
 169         u16 sc = le16_to_cpu(hdr->seq_ctl);
 170         unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
 171         struct ieee80211_frag_entry *entry;
 172         struct rtl_80211_hdr_3addrqos *hdr_3addrqos;
 173         struct rtl_80211_hdr_4addrqos *hdr_4addrqos;
 174         u8 tid;
 175
 176         if(((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) {
 177           hdr_4addrqos = (struct rtl_80211_hdr_4addrqos *)hdr;
 178           tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QCTL_TID;
 179           tid = UP2AC(tid);
 180           tid ++;
 181         } else if (IEEE80211_QOS_HAS_SEQ(fc)) {
 182           hdr_3addrqos = (struct rtl_80211_hdr_3addrqos *)hdr;
 183           tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QCTL_TID;
 184           tid = UP2AC(tid);
 185           tid ++;
 186         } else {
 187           tid = 0;
 188         }
 189
 190         entry = ieee80211_frag_cache_find(ieee, seq, -1, tid, hdr->addr2,
 191                                           hdr->addr1);
 192
 193         if (entry == NULL) {
 194                 IEEE80211_DEBUG_FRAG(
 195                         "could not invalidate fragment cache "
 196                         "entry (seq=%u)\n", seq);
 197                 return -1;
 198         }
 199
 200         entry->skb = NULL;
 201         return 0;
 202 }
 203
 204
 205
 206 /* ieee80211_rx_frame_mgtmt
 207  *
 208  * Responsible for handling management control frames
 209  *
 210  * Called by ieee80211_rx */
 211 static inline int
 212 ieee80211_rx_frame_mgmt(struct ieee80211_device *ieee, struct sk_buff *skb,
 213                         struct ieee80211_rx_stats *rx_stats, u16 type,
 214                         u16 stype)
 215 {
 216         /* On the struct stats definition there is written that
 217          * this is not mandatory.... but seems that the probe
 218          * response parser uses it
 219          */
 220         struct rtl_80211_hdr_3addr *hdr = (struct rtl_80211_hdr_3addr *)skb->data;
 221
 222         rx_stats->len = skb->len;
 223         ieee80211_rx_mgt(ieee,(struct rtl_80211_hdr_4addr *)skb->data,rx_stats);
 224         /* if ((ieee->state == IEEE80211_LINKED) && (memcmp(hdr->addr3, ieee->current_network.bssid, ETH_ALEN))) */
 225         if ((memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN)))/* use ADDR1 to perform address matching for Management frames */
 226         {
 227                 dev_kfree_skb_any(skb);
 228                 return 0;
 229         }
 230
 231         ieee80211_rx_frame_softmac(ieee, skb, rx_stats, type, stype);
 232
 233         dev_kfree_skb_any(skb);
 234
 235         return 0;
 236
 237         #ifdef NOT_YET
 238         if (ieee->iw_mode == IW_MODE_MASTER) {
 239                 printk(KERN_DEBUG "%s: Master mode not yet supported.\n",
 240                        ieee->dev->name);
 241                 return 0;
 242 /*
 243   hostap_update_sta_ps(ieee, (struct hostap_ieee80211_hdr_4addr *)
 244   skb->data);*/
 245         }
 246
 247         if (ieee->hostapd && type == IEEE80211_TYPE_MGMT) {
 248                 if (stype == WLAN_FC_STYPE_BEACON &&
 249                     ieee->iw_mode == IW_MODE_MASTER) {
 250                         struct sk_buff *skb2;
 251                         /* Process beacon frames also in kernel driver to
 252                          * update STA(AP) table statistics */
 253                         skb2 = skb_clone(skb, GFP_ATOMIC);
 254                         if (skb2)
 255                                 hostap_rx(skb2->dev, skb2, rx_stats);
 256                 }
 257
 258                 /* send management frames to the user space daemon for
 259                  * processing */
 260                 ieee->apdevstats.rx_packets++;
 261                 ieee->apdevstats.rx_bytes += skb->len;
 262                 prism2_rx_80211(ieee->apdev, skb, rx_stats, PRISM2_RX_MGMT);
 263                 return 0;
 264         }
 265
 266             if (ieee->iw_mode == IW_MODE_MASTER) {
 267                 if (type != WLAN_FC_TYPE_MGMT && type != WLAN_FC_TYPE_CTRL) {
 268                         printk(KERN_DEBUG "%s: unknown management frame "
 269                                "(type=0x%02x, stype=0x%02x) dropped\n",
 270                                skb->dev->name, type, stype);
 271                         return -1;
 272                 }
 273
 274                 hostap_rx(skb->dev, skb, rx_stats);
 275                 return 0;
 276         }
 277
 278         printk(KERN_DEBUG "%s: hostap_rx_frame_mgmt: management frame "
 279                "received in non-Host AP mode\n", skb->dev->name);
 280         return -1;
 281         #endif
 282 }
 283
 284
 285
 286 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
 287 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
 288 static unsigned char rfc1042_header[] =
 289 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
 290 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
 291 static unsigned char bridge_tunnel_header[] =
 292 { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
 293 /* No encapsulation header if EtherType < 0x600 (=length) */
 294
 295 /* Called by ieee80211_rx_frame_decrypt */
 296 static int ieee80211_is_eapol_frame(struct ieee80211_device *ieee,
 297                                     struct sk_buff *skb, size_t hdrlen)
 298 {
 299         struct net_device *dev = ieee->dev;
 300         u16 fc, ethertype;
 301         struct rtl_80211_hdr_4addr *hdr;
 302         u8 *pos;
 303
 304         if (skb->len < 24)
 305                 return 0;
 306
 307         hdr = (struct rtl_80211_hdr_4addr *) skb->data;
 308         fc = le16_to_cpu(hdr->frame_ctl);
 309
 310         /* check that the frame is unicast frame to us */
 311         if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 312             IEEE80211_FCTL_TODS &&
 313             memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 &&
 314             memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
 315                 /* ToDS frame with own addr BSSID and DA */
 316         } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 317                    IEEE80211_FCTL_FROMDS &&
 318                    memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
 319                 /* FromDS frame with own addr as DA */
 320         } else
 321                 return 0;
 322
 323         if (skb->len < 24 + 8)
 324                 return 0;
 325
 326         /* check for port access entity Ethernet type */
 327 //      pos = skb->data + 24;
 328         pos = skb->data + hdrlen;
 329         ethertype = (pos[6] << 8) | pos[7];
 330         if (ethertype == ETH_P_PAE)
 331                 return 1;
 332
 333         return 0;
 334 }
 335
 336 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
 337 static inline int
 338 ieee80211_rx_frame_decrypt(struct ieee80211_device *ieee, struct sk_buff *skb,
 339                            struct ieee80211_crypt_data *crypt)
 340 {
 341         struct rtl_80211_hdr_4addr *hdr;
 342         int res, hdrlen;
 343
 344         if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
 345                 return 0;
 346         if (ieee->hwsec_active)
 347         {
 348                 struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb+ MAX_DEV_ADDR_SIZE);
 349                 tcb_desc->bHwSec = 1;
 350         }
 351         hdr = (struct rtl_80211_hdr_4addr *) skb->data;
 352         hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 353
 354         if (ieee->tkip_countermeasures &&
 355             strcmp(crypt->ops->name, "TKIP") == 0) {
 356                 if (net_ratelimit()) {
 357                         printk(KERN_DEBUG "%s: TKIP countermeasures: dropped "
 358                                "received packet from %pM\n",
 359                                ieee->dev->name, hdr->addr2);
 360                 }
 361                 return -1;
 362         }
 363
 364         atomic_inc(&crypt->refcnt);
 365         res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
 366         atomic_dec(&crypt->refcnt);
 367         if (res < 0) {
 368                 IEEE80211_DEBUG_DROP(
 369                         "decryption failed (SA=%pM"
 370                         ") res=%d\n", hdr->addr2, res);
 371                 if (res == -2)
 372                         IEEE80211_DEBUG_DROP("Decryption failed ICV "
 373                                              "mismatch (key %d)\n",
 374                                              skb->data[hdrlen + 3] >> 6);
 375                 ieee->ieee_stats.rx_discards_undecryptable++;
 376                 return -1;
 377         }
 378
 379         return res;
 380 }
 381
 382
 383 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
 384 static inline int
 385 ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device *ieee, struct sk_buff *skb,
 386                              int keyidx, struct ieee80211_crypt_data *crypt)
 387 {
 388         struct rtl_80211_hdr_4addr *hdr;
 389         int res, hdrlen;
 390
 391         if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
 392                 return 0;
 393         if (ieee->hwsec_active)
 394         {
 395                 struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb+ MAX_DEV_ADDR_SIZE);
 396                 tcb_desc->bHwSec = 1;
 397         }
 398
 399         hdr = (struct rtl_80211_hdr_4addr *) skb->data;
 400         hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 401
 402         atomic_inc(&crypt->refcnt);
 403         res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
 404         atomic_dec(&crypt->refcnt);
 405         if (res < 0) {
 406                 printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed"
 407                        " (SA=%pM keyidx=%d)\n",
 408                        ieee->dev->name, hdr->addr2, keyidx);
 409                 return -1;
 410         }
 411
 412         return 0;
 413 }
 414
 415
 416 /* this function is stolen from ipw2200 driver*/
 417 #define IEEE_PACKET_RETRY_TIME (5*HZ)
 418 static int is_duplicate_packet(struct ieee80211_device *ieee,
 419                                       struct rtl_80211_hdr_4addr *header)
 420 {
 421         u16 fc = le16_to_cpu(header->frame_ctl);
 422         u16 sc = le16_to_cpu(header->seq_ctl);
 423         u16 seq = WLAN_GET_SEQ_SEQ(sc);
 424         u16 frag = WLAN_GET_SEQ_FRAG(sc);
 425         u16 *last_seq, *last_frag;
 426         unsigned long *last_time;
 427         struct rtl_80211_hdr_3addrqos *hdr_3addrqos;
 428         struct rtl_80211_hdr_4addrqos *hdr_4addrqos;
 429         u8 tid;
 430
 431
 432         //TO2DS and QoS
 433         if(((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS)&&IEEE80211_QOS_HAS_SEQ(fc)) {
 434           hdr_4addrqos = (struct rtl_80211_hdr_4addrqos *)header;
 435           tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QCTL_TID;
 436           tid = UP2AC(tid);
 437           tid ++;
 438         } else if(IEEE80211_QOS_HAS_SEQ(fc)) { //QoS
 439           hdr_3addrqos = (struct rtl_80211_hdr_3addrqos *)header;
 440           tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QCTL_TID;
 441           tid = UP2AC(tid);
 442           tid ++;
 443         } else { // no QoS
 444           tid = 0;
 445         }
 446
 447         switch (ieee->iw_mode) {
 448         case IW_MODE_ADHOC:
 449         {
 450                 struct list_head *p;
 451                 struct ieee_ibss_seq *entry = NULL;
 452                 u8 *mac = header->addr2;
 453                 int index = mac[5] % IEEE_IBSS_MAC_HASH_SIZE;
 454
 455                 list_for_each(p, &ieee->ibss_mac_hash[index]) {
 456                         entry = list_entry(p, struct ieee_ibss_seq, list);
 457                         if (!memcmp(entry->mac, mac, ETH_ALEN))
 458                                 break;
 459                 }
 460         //      if (memcmp(entry->mac, mac, ETH_ALEN)){
 461                 if (p == &ieee->ibss_mac_hash[index]) {
 462                         entry = kmalloc(sizeof(struct ieee_ibss_seq), GFP_ATOMIC);
 463                         if (!entry)
 464                                 return 0;
 465                         memcpy(entry->mac, mac, ETH_ALEN);
 466                         entry->seq_num[tid] = seq;
 467                         entry->frag_num[tid] = frag;
 468                         entry->packet_time[tid] = jiffies;
 469                         list_add(&entry->list, &ieee->ibss_mac_hash[index]);
 470                         return 0;
 471                 }
 472                 last_seq = &entry->seq_num[tid];
 473                 last_frag = &entry->frag_num[tid];
 474                 last_time = &entry->packet_time[tid];
 475                 break;
 476         }
 477
 478         case IW_MODE_INFRA:
 479                 last_seq = &ieee->last_rxseq_num[tid];
 480                 last_frag = &ieee->last_rxfrag_num[tid];
 481                 last_time = &ieee->last_packet_time[tid];
 482
 483                 break;
 484         default:
 485                 return 0;
 486         }
 487
 488 //      if(tid != 0) {
 489 //              printk(KERN_WARNING ":)))))))))))%x %x %x, fc(%x)\n", tid, *last_seq, seq, header->frame_ctl);
 490 //      }
 491         if ((*last_seq == seq) &&
 492             time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) {
 493                 if (*last_frag == frag)
 494                         goto drop;
 495                 if (*last_frag + 1 != frag)
 496                         /* out-of-order fragment */
 497                         goto drop;
 498         } else
 499                 *last_seq = seq;
 500
 501         *last_frag = frag;
 502         *last_time = jiffies;
 503         return 0;
 504
 505 drop:
 506 //      BUG_ON(!(fc & IEEE80211_FCTL_RETRY));
 507
 508         return 1;
 509 }
 510
 511 static bool AddReorderEntry(PRX_TS_RECORD pTS, PRX_REORDER_ENTRY pReorderEntry)
 512 {
 513         struct list_head *pList = &pTS->RxPendingPktList;
 514         while(pList->next != &pTS->RxPendingPktList)
 515         {
 516                 if( SN_LESS(pReorderEntry->SeqNum, ((PRX_REORDER_ENTRY)list_entry(pList->next,RX_REORDER_ENTRY,List))->SeqNum) )
 517                 {
 518                         pList = pList->next;
 519                 }
 520                 else if( SN_EQUAL(pReorderEntry->SeqNum, ((PRX_REORDER_ENTRY)list_entry(pList->next,RX_REORDER_ENTRY,List))->SeqNum) )
 521                 {
 522                         return false;
 523                 }
 524                 else
 525                 {
 526                         break;
 527                 }
 528         }
 529         pReorderEntry->List.next = pList->next;
 530         pReorderEntry->List.next->prev = &pReorderEntry->List;
 531         pReorderEntry->List.prev = pList;
 532         pList->next = &pReorderEntry->List;
 533
 534         return true;
 535 }
 536
 537 void ieee80211_indicate_packets(struct ieee80211_device *ieee, struct ieee80211_rxb **prxbIndicateArray,u8  index)
 538 {
 539         u8 i = 0 , j=0;
 540         u16 ethertype;
 541 //      if(index > 1)
 542 //              IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): hahahahhhh, We indicate packet from reorder list, index is %u\n",__func__,index);
 543         for(j = 0; j<index; j++)
 544         {
 545 //added by amy for reorder
 546                 struct ieee80211_rxb *prxb = prxbIndicateArray[j];
 547                 for(i = 0; i<prxb->nr_subframes; i++) {
 548                         struct sk_buff *sub_skb = prxb->subframes[i];
 549
 550                 /* convert hdr + possible LLC headers into Ethernet header */
 551                         ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
 552                         if (sub_skb->len >= 8 &&
 553                                 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
 554                                   ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
 555                                  memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
 556                         /* remove RFC1042 or Bridge-Tunnel encapsulation and
 557                          * replace EtherType */
 558                                 skb_pull(sub_skb, SNAP_SIZE);
 559                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
 560                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
 561                         } else {
 562                         /* Leave Ethernet header part of hdr and full payload */
 563                                 put_unaligned_be16(sub_skb->len, skb_push(sub_skb, 2));
 564                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
 565                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
 566                         }
 567                         //stats->rx_packets++;
 568                         //stats->rx_bytes += sub_skb->len;
 569
 570                 /* Indicat the packets to upper layer */
 571                         if (sub_skb) {
 572                                 sub_skb->protocol = eth_type_trans(sub_skb, ieee->dev);
 573                                 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
 574                                 sub_skb->dev = ieee->dev;
 575                                 sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
 576                                 //skb->ip_summed = CHECKSUM_UNNECESSARY; /* 802.11 crc not sufficient */
 577                                 ieee->last_rx_ps_time = jiffies;
 578                                 netif_rx(sub_skb);
 579                         }
 580                 }
 581                 kfree(prxb);
 582                 prxb = NULL;
 583         }
 584 }
 585
 586
 587 static void RxReorderIndicatePacket(struct ieee80211_device *ieee,
 588                                     struct ieee80211_rxb *prxb,
 589                                     PRX_TS_RECORD pTS, u16 SeqNum)
 590 {
 591         PRT_HIGH_THROUGHPUT     pHTInfo = ieee->pHTInfo;
 592         PRX_REORDER_ENTRY       pReorderEntry = NULL;
 593         struct ieee80211_rxb **prxbIndicateArray;
 594         u8                      WinSize = pHTInfo->RxReorderWinSize;
 595         u16                     WinEnd = (pTS->RxIndicateSeq + WinSize -1)%4096;
 596         u8                      index = 0;
 597         bool                    bMatchWinStart = false, bPktInBuf = false;
 598         IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): Seq is %d,pTS->RxIndicateSeq is %d, WinSize is %d\n",__func__,SeqNum,pTS->RxIndicateSeq,WinSize);
 599
 600         prxbIndicateArray = kmalloc(sizeof(struct ieee80211_rxb *) *
 601                         REORDER_WIN_SIZE, GFP_KERNEL);
 602         if (!prxbIndicateArray)
 603                 return;
 604
 605         /* Rx Reorder initialize condition.*/
 606         if (pTS->RxIndicateSeq == 0xffff) {
 607                 pTS->RxIndicateSeq = SeqNum;
 608         }
 609
 610         /* Drop out the packet which SeqNum is smaller than WinStart */
 611         if (SN_LESS(SeqNum, pTS->RxIndicateSeq)) {
 612                 IEEE80211_DEBUG(IEEE80211_DL_REORDER,"Packet Drop! IndicateSeq: %d, NewSeq: %d\n",
 613                                  pTS->RxIndicateSeq, SeqNum);
 614                 pHTInfo->RxReorderDropCounter++;
 615                 {
 616                         int i;
 617                         for(i =0; i < prxb->nr_subframes; i++) {
 618                                 dev_kfree_skb(prxb->subframes[i]);
 619                         }
 620                         kfree(prxb);
 621                         prxb = NULL;
 622                 }
 623
 624                 kfree(prxbIndicateArray);
 625                 return;
 626         }
 627
 628         /*
 629          * Sliding window manipulation. Conditions includes:
 630          * 1. Incoming SeqNum is equal to WinStart =>Window shift 1
 631          * 2. Incoming SeqNum is larger than the WinEnd => Window shift N
 632          */
 633         if(SN_EQUAL(SeqNum, pTS->RxIndicateSeq)) {
 634                 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
 635                 bMatchWinStart = true;
 636         } else if(SN_LESS(WinEnd, SeqNum)) {
 637                 if(SeqNum >= (WinSize - 1)) {
 638                         pTS->RxIndicateSeq = SeqNum + 1 -WinSize;
 639                 } else {
 640                         pTS->RxIndicateSeq = 4095 - (WinSize - (SeqNum +1)) + 1;
 641                 }
 642                 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "Window Shift! IndicateSeq: %d, NewSeq: %d\n",pTS->RxIndicateSeq, SeqNum);
 643         }
 644
 645         /*
 646          * Indication process.
 647          * After Packet dropping and Sliding Window shifting as above, we can now just indicate the packets
 648          * with the SeqNum smaller than latest WinStart and buffer other packets.
 649          */
 650         /* For Rx Reorder condition:
 651          * 1. All packets with SeqNum smaller than WinStart => Indicate
 652          * 2. All packets with SeqNum larger than or equal to WinStart => Buffer it.
 653          */
 654         if(bMatchWinStart) {
 655                 /* Current packet is going to be indicated.*/
 656                 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "Packets indication!! IndicateSeq: %d, NewSeq: %d\n",\
 657                                 pTS->RxIndicateSeq, SeqNum);
 658                 prxbIndicateArray[0] = prxb;
 659 //              printk("========================>%s(): SeqNum is %d\n",__func__,SeqNum);
 660                 index = 1;
 661         } else {
 662                 /* Current packet is going to be inserted into pending list.*/
 663                 //IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): We RX no ordered packed, insert to ordered list\n",__func__);
 664                 if(!list_empty(&ieee->RxReorder_Unused_List)) {
 665                         pReorderEntry = (PRX_REORDER_ENTRY)list_entry(ieee->RxReorder_Unused_List.next,RX_REORDER_ENTRY,List);
 666                         list_del_init(&pReorderEntry->List);
 667
 668                         /* Make a reorder entry and insert into a the packet list.*/
 669                         pReorderEntry->SeqNum = SeqNum;
 670                         pReorderEntry->prxb = prxb;
 671         //              IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): pREorderEntry->SeqNum is %d\n",__func__,pReorderEntry->SeqNum);
 672
 673                         if(!AddReorderEntry(pTS, pReorderEntry)) {
 674                                 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "%s(): Duplicate packet is dropped!! IndicateSeq: %d, NewSeq: %d\n",
 675                                         __func__, pTS->RxIndicateSeq, SeqNum);
 676                                 list_add_tail(&pReorderEntry->List,&ieee->RxReorder_Unused_List);
 677                                 {
 678                                         int i;
 679                                         for(i =0; i < prxb->nr_subframes; i++) {
 680                                                 dev_kfree_skb(prxb->subframes[i]);
 681                                         }
 682                                         kfree(prxb);
 683                                         prxb = NULL;
 684                                 }
 685                         } else {
 686                                 IEEE80211_DEBUG(IEEE80211_DL_REORDER,
 687                                          "Pkt insert into buffer!! IndicateSeq: %d, NewSeq: %d\n",pTS->RxIndicateSeq, SeqNum);
 688                         }
 689                 }
 690                 else {
 691                         /*
 692                          * Packets are dropped if there is not enough reorder entries.
 693                          * This part shall be modified!! We can just indicate all the
 694                          * packets in buffer and get reorder entries.
 695                          */
 696                         IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): There is no reorder entry!! Packet is dropped!!\n");
 697                         {
 698                                 int i;
 699                                 for(i =0; i < prxb->nr_subframes; i++) {
 700                                         dev_kfree_skb(prxb->subframes[i]);
 701                                 }
 702                                 kfree(prxb);
 703                                 prxb = NULL;
 704                         }
 705                 }
 706         }
 707
 708         /* Check if there is any packet need indicate.*/
 709         while(!list_empty(&pTS->RxPendingPktList)) {
 710                 IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): start RREORDER indicate\n",__func__);
 711                 pReorderEntry = (PRX_REORDER_ENTRY)list_entry(pTS->RxPendingPktList.prev,RX_REORDER_ENTRY,List);
 712                 if (SN_LESS(pReorderEntry->SeqNum, pTS->RxIndicateSeq) ||
 713                     SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq))
 714                 {
 715                         /* This protect buffer from overflow. */
 716                         if (index >= REORDER_WIN_SIZE) {
 717                                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): Buffer overflow!! \n");
 718                                 bPktInBuf = true;
 719                                 break;
 720                         }
 721
 722                         list_del_init(&pReorderEntry->List);
 723
 724                         if(SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq))
 725                                 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
 726
 727                         IEEE80211_DEBUG(IEEE80211_DL_REORDER,"Packets indication!! IndicateSeq: %d, NewSeq: %d\n",pTS->RxIndicateSeq, SeqNum);
 728                         prxbIndicateArray[index] = pReorderEntry->prxb;
 729                 //      printk("========================>%s(): pReorderEntry->SeqNum is %d\n",__func__,pReorderEntry->SeqNum);
 730                         index++;
 731
 732                         list_add_tail(&pReorderEntry->List,&ieee->RxReorder_Unused_List);
 733                 } else {
 734                         bPktInBuf = true;
 735                         break;
 736                 }
 737         }
 738
 739         /* Handling pending timer. Set this timer to prevent from long time Rx buffering.*/
 740         if (index>0) {
 741                 // Cancel previous pending timer.
 742         //      del_timer_sync(&pTS->RxPktPendingTimer);
 743                 pTS->RxTimeoutIndicateSeq = 0xffff;
 744
 745                 // Indicate packets
 746                 if(index>REORDER_WIN_SIZE){
 747                         IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): Rx Reorder buffer full!! \n");
 748                         kfree(prxbIndicateArray);
 749                         return;
 750                 }
 751                 ieee80211_indicate_packets(ieee, prxbIndicateArray, index);
 752         }
 753
 754         if (bPktInBuf && pTS->RxTimeoutIndicateSeq==0xffff) {
 755                 // Set new pending timer.
 756                 IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): SET rx timeout timer\n", __func__);
 757                 pTS->RxTimeoutIndicateSeq = pTS->RxIndicateSeq;
 758                 if(timer_pending(&pTS->RxPktPendingTimer))
 759                         del_timer_sync(&pTS->RxPktPendingTimer);
 760                 pTS->RxPktPendingTimer.expires = jiffies +
 761                                 msecs_to_jiffies(pHTInfo->RxReorderPendingTime);
 762                 add_timer(&pTS->RxPktPendingTimer);
 763         }
 764
 765         kfree(prxbIndicateArray);
 766 }
 767
 768 static u8 parse_subframe(struct sk_buff *skb,
 769                          struct ieee80211_rx_stats *rx_stats,
 770                          struct ieee80211_rxb *rxb, u8 *src, u8 *dst)
 771 {
 772         struct rtl_80211_hdr_3addr  *hdr = (struct rtl_80211_hdr_3addr *)skb->data;
 773         u16             fc = le16_to_cpu(hdr->frame_ctl);
 774
 775         u16             LLCOffset= sizeof(struct rtl_80211_hdr_3addr);
 776         u16             ChkLength;
 777         bool            bIsAggregateFrame = false;
 778         u16             nSubframe_Length;
 779         u8              nPadding_Length = 0;
 780         u16             SeqNum=0;
 781
 782         struct sk_buff *sub_skb;
 783         /* just for debug purpose */
 784         SeqNum = WLAN_GET_SEQ_SEQ(le16_to_cpu(hdr->seq_ctl));
 785
 786         if ((IEEE80211_QOS_HAS_SEQ(fc))&&\
 787                         (((frameqos *)(skb->data + IEEE80211_3ADDR_LEN))->field.reserved)) {
 788                 bIsAggregateFrame = true;
 789         }
 790
 791         if (IEEE80211_QOS_HAS_SEQ(fc)) {
 792                 LLCOffset += 2;
 793         }
 794
 795         if (rx_stats->bContainHTC) {
 796                 LLCOffset += sHTCLng;
 797         }
 798         // Null packet, don't indicate it to upper layer
 799         ChkLength = LLCOffset;/* + (Frame_WEP(frame)!=0 ?Adapter->MgntInfo.SecurityInfo.EncryptionHeadOverhead:0);*/
 800
 801         if (skb->len <= ChkLength)
 802                 return 0;
 803
 804         skb_pull(skb, LLCOffset);
 805
 806         if(!bIsAggregateFrame) {
 807                 rxb->nr_subframes = 1;
 808 #ifdef JOHN_NOCPY
 809                 rxb->subframes[0] = skb;
 810 #else
 811                 rxb->subframes[0] = skb_copy(skb, GFP_ATOMIC);
 812 #endif
 813
 814                 memcpy(rxb->src,src,ETH_ALEN);
 815                 memcpy(rxb->dst,dst,ETH_ALEN);
 816                 //IEEE80211_DEBUG_DATA(IEEE80211_DL_RX,skb->data,skb->len);
 817                 return 1;
 818         } else {
 819                 rxb->nr_subframes = 0;
 820                 memcpy(rxb->src,src,ETH_ALEN);
 821                 memcpy(rxb->dst,dst,ETH_ALEN);
 822                 while(skb->len > ETHERNET_HEADER_SIZE) {
 823                         /* Offset 12 denote 2 mac address */
 824                         nSubframe_Length = *((u16 *)(skb->data + 12));
 825                         //==m==>change the length order
 826                         nSubframe_Length = (nSubframe_Length>>8) + (nSubframe_Length<<8);
 827
 828                         if (skb->len<(ETHERNET_HEADER_SIZE + nSubframe_Length)) {
 829                                 printk("%s: A-MSDU parse error!! pRfd->nTotalSubframe : %d\n",\
 830                                                 __func__, rxb->nr_subframes);
 831                                 printk("%s: A-MSDU parse error!! Subframe Length: %d\n",__func__, nSubframe_Length);
 832                                 printk("nRemain_Length is %d and nSubframe_Length is : %d\n",skb->len,nSubframe_Length);
 833                                 printk("The Packet SeqNum is %d\n",SeqNum);
 834                                 return 0;
 835                         }
 836
 837                         /* move the data point to data content */
 838                         skb_pull(skb, ETHERNET_HEADER_SIZE);
 839
 840 #ifdef JOHN_NOCPY
 841                         sub_skb = skb_clone(skb, GFP_ATOMIC);
 842                         sub_skb->len = nSubframe_Length;
 843                         sub_skb->tail = sub_skb->data + nSubframe_Length;
 844 #else
 845                         /* Allocate new skb for releasing to upper layer */
 846                         sub_skb = dev_alloc_skb(nSubframe_Length + 12);
 847                         if (!sub_skb)
 848                                 return 0;
 849                         skb_reserve(sub_skb, 12);
 850                         skb_put_data(sub_skb, skb->data, nSubframe_Length);
 851 #endif
 852                         rxb->subframes[rxb->nr_subframes++] = sub_skb;
 853                         if (rxb->nr_subframes >= MAX_SUBFRAME_COUNT) {
 854                                 IEEE80211_DEBUG_RX("ParseSubframe(): Too many Subframes! Packets dropped!\n");
 855                                 break;
 856                         }
 857                         skb_pull(skb, nSubframe_Length);
 858
 859                         if (skb->len != 0) {
 860                                 nPadding_Length = 4 - ((nSubframe_Length + ETHERNET_HEADER_SIZE) % 4);
 861                                 if (nPadding_Length == 4) {
 862                                         nPadding_Length = 0;
 863                                 }
 864
 865                                 if (skb->len < nPadding_Length) {
 866                                         return 0;
 867                                 }
 868
 869                                 skb_pull(skb, nPadding_Length);
 870                         }
 871                 }
 872 #ifdef JOHN_NOCPY
 873                 dev_kfree_skb(skb);
 874 #endif
 875                 //{just for debug added by david
 876                 //printk("AMSDU::rxb->nr_subframes = %d\n",rxb->nr_subframes);
 877                 //}
 878                 return rxb->nr_subframes;
 879         }
 880 }
 881
 882 /* All received frames are sent to this function. @skb contains the frame in
 883  * IEEE 802.11 format, i.e., in the format it was sent over air.
 884  * This function is called only as a tasklet (software IRQ). */
 885 int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
 886                  struct ieee80211_rx_stats *rx_stats)
 887 {
 888         struct net_device *dev = ieee->dev;
 889         struct rtl_80211_hdr_4addr *hdr;
 890         //struct rtl_80211_hdr_3addrqos *hdr;
 891
 892         size_t hdrlen;
 893         u16 fc, type, stype, sc;
 894         struct net_device_stats *stats;
 895         unsigned int frag;
 896         u8 *payload;
 897         u16 ethertype;
 898         //added by amy for reorder
 899         u8      TID = 0;
 900         u16     SeqNum = 0;
 901         PRX_TS_RECORD pTS = NULL;
 902         //bool bIsAggregateFrame = false;
 903         //added by amy for reorder
 904 #ifdef NOT_YET
 905         struct net_device *wds = NULL;
 906         struct net_device *wds = NULL;
 907         int from_assoc_ap = 0;
 908         void *sta = NULL;
 909 #endif
 910 //      u16 qos_ctl = 0;
 911         u8 dst[ETH_ALEN];
 912         u8 src[ETH_ALEN];
 913         u8 bssid[ETH_ALEN];
 914         struct ieee80211_crypt_data *crypt = NULL;
 915         int keyidx = 0;
 916
 917         int i;
 918         struct ieee80211_rxb *rxb = NULL;
 919         // cheat the hdr type
 920         hdr = (struct rtl_80211_hdr_4addr *)skb->data;
 921         stats = &ieee->stats;
 922
 923         if (skb->len < 10) {
 924                 printk(KERN_INFO "%s: SKB length < 10\n",
 925                        dev->name);
 926                 goto rx_dropped;
 927         }
 928
 929         fc = le16_to_cpu(hdr->frame_ctl);
 930         type = WLAN_FC_GET_TYPE(fc);
 931         stype = WLAN_FC_GET_STYPE(fc);
 932         sc = le16_to_cpu(hdr->seq_ctl);
 933
 934         frag = WLAN_GET_SEQ_FRAG(sc);
 935         hdrlen = ieee80211_get_hdrlen(fc);
 936
 937         if (HTCCheck(ieee, skb->data))
 938         {
 939                 if(net_ratelimit())
 940                         printk("find HTCControl\n");
 941                 hdrlen += 4;
 942                 rx_stats->bContainHTC = true;
 943         }
 944
 945         //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
 946 #ifdef NOT_YET
 947         /* Put this code here so that we avoid duplicating it in all
 948          * Rx paths. - Jean II */
 949 #ifdef IW_WIRELESS_SPY          /* defined in iw_handler.h */
 950         /* If spy monitoring on */
 951         if (iface->spy_data.spy_number > 0) {
 952                 struct iw_quality wstats;
 953                 wstats.level = rx_stats->rssi;
 954                 wstats.noise = rx_stats->noise;
 955                 wstats.updated = 6;     /* No qual value */
 956                 /* Update spy records */
 957                 wireless_spy_update(dev, hdr->addr2, &wstats);
 958         }
 959 #endif /* IW_WIRELESS_SPY */
 960         hostap_update_rx_stats(local->ap, hdr, rx_stats);
 961 #endif
 962
 963         if (ieee->iw_mode == IW_MODE_MONITOR) {
 964                 unsigned int len = skb->len;
 965
 966                 ieee80211_monitor_rx(ieee, skb, rx_stats);
 967                 stats->rx_packets++;
 968                 stats->rx_bytes += len;
 969                 return 1;
 970         }
 971
 972         if (ieee->host_decrypt) {
 973                 int idx = 0;
 974                 if (skb->len >= hdrlen + 3)
 975                         idx = skb->data[hdrlen + 3] >> 6;
 976                 crypt = ieee->crypt[idx];
 977 #ifdef NOT_YET
 978                 sta = NULL;
 979
 980                 /* Use station specific key to override default keys if the
 981                  * receiver address is a unicast address ("individual RA"). If
 982                  * bcrx_sta_key parameter is set, station specific key is used
 983                  * even with broad/multicast targets (this is against IEEE
 984                  * 802.11, but makes it easier to use different keys with
 985                  * stations that do not support WEP key mapping). */
 986
 987                 if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key)
 988                         (void) hostap_handle_sta_crypto(local, hdr, &crypt,
 989                                                         &sta);
 990 #endif
 991
 992                 /* allow NULL decrypt to indicate an station specific override
 993                  * for default encryption */
 994                 if (crypt && (crypt->ops == NULL ||
 995                               crypt->ops->decrypt_mpdu == NULL))
 996                         crypt = NULL;
 997
 998                 if (!crypt && (fc & IEEE80211_FCTL_WEP)) {
 999                         /* This seems to be triggered by some (multicast?)
1000                          * frames from other than current BSS, so just drop the
1001                          * frames silently instead of filling system log with
1002                          * these reports. */
1003                         IEEE80211_DEBUG_DROP("Decryption failed (not set)"
1004                                              " (SA=%pM)\n",
1005                                              hdr->addr2);
1006                         ieee->ieee_stats.rx_discards_undecryptable++;
1007                         goto rx_dropped;
1008                 }
1009         }
1010
1011         if (skb->len < IEEE80211_DATA_HDR3_LEN)
1012                 goto rx_dropped;
1013
1014         // if QoS enabled, should check the sequence for each of the AC
1015         if ((!ieee->pHTInfo->bCurRxReorderEnable) || !ieee->current_network.qos_data.active|| !IsDataFrame(skb->data) || IsLegacyDataFrame(skb->data)) {
1016                 if (is_duplicate_packet(ieee, hdr))
1017                 goto rx_dropped;
1018
1019         }
1020         else
1021         {
1022                 PRX_TS_RECORD pRxTS = NULL;
1023                         //IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): QOS ENABLE AND RECEIVE QOS DATA , we will get Ts, tid:%d\n",__func__, tid);
1024                 if(GetTs(
1025                                 ieee,
1026                                 (PTS_COMMON_INFO *) &pRxTS,
1027                                 hdr->addr2,
1028                                 Frame_QoSTID((u8 *)(skb->data)),
1029                                 RX_DIR,
1030                                 true))
1031                 {
1032
1033                 //      IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): pRxTS->RxLastFragNum is %d,frag is %d,pRxTS->RxLastSeqNum is %d,seq is %d\n",__func__,pRxTS->RxLastFragNum,frag,pRxTS->RxLastSeqNum,WLAN_GET_SEQ_SEQ(sc));
1034                         if ((fc & (1<<11)) &&
1035                             (frag == pRxTS->RxLastFragNum) &&
1036                             (WLAN_GET_SEQ_SEQ(sc) == pRxTS->RxLastSeqNum)) {
1037                                 goto rx_dropped;
1038                         }
1039                         else
1040                         {
1041                                 pRxTS->RxLastFragNum = frag;
1042                                 pRxTS->RxLastSeqNum = WLAN_GET_SEQ_SEQ(sc);
1043                         }
1044                 }
1045                 else
1046                 {
1047                         IEEE80211_DEBUG(IEEE80211_DL_ERR, "%s(): No TS!! Skip the check!!\n",__func__);
1048                         goto rx_dropped;
1049                 }
1050         }
1051         if (type == IEEE80211_FTYPE_MGMT) {
1052
1053
1054         //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
1055                 if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
1056                         goto rx_dropped;
1057                 else
1058                         goto rx_exit;
1059         }
1060
1061         /* Data frame - extract src/dst addresses */
1062         switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
1063         case IEEE80211_FCTL_FROMDS:
1064                 memcpy(dst, hdr->addr1, ETH_ALEN);
1065                 memcpy(src, hdr->addr3, ETH_ALEN);
1066                 memcpy(bssid, hdr->addr2, ETH_ALEN);
1067                 break;
1068         case IEEE80211_FCTL_TODS:
1069                 memcpy(dst, hdr->addr3, ETH_ALEN);
1070                 memcpy(src, hdr->addr2, ETH_ALEN);
1071                 memcpy(bssid, hdr->addr1, ETH_ALEN);
1072                 break;
1073         case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
1074                 if (skb->len < IEEE80211_DATA_HDR4_LEN)
1075                         goto rx_dropped;
1076                 memcpy(dst, hdr->addr3, ETH_ALEN);
1077                 memcpy(src, hdr->addr4, ETH_ALEN);
1078                 memcpy(bssid, ieee->current_network.bssid, ETH_ALEN);
1079                 break;
1080         default:
1081                 memcpy(dst, hdr->addr1, ETH_ALEN);
1082                 memcpy(src, hdr->addr2, ETH_ALEN);
1083                 memcpy(bssid, hdr->addr3, ETH_ALEN);
1084                 break;
1085         }
1086
1087 #ifdef NOT_YET
1088         if (hostap_rx_frame_wds(ieee, hdr, fc, &wds))
1089                 goto rx_dropped;
1090         if (wds) {
1091                 skb->dev = dev = wds;
1092                 stats = hostap_get_stats(dev);
1093         }
1094
1095         if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
1096             (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS &&
1097             ieee->stadev &&
1098             memcmp(hdr->addr2, ieee->assoc_ap_addr, ETH_ALEN) == 0) {
1099                 /* Frame from BSSID of the AP for which we are a client */
1100                 skb->dev = dev = ieee->stadev;
1101                 stats = hostap_get_stats(dev);
1102                 from_assoc_ap = 1;
1103         }
1104
1105         if ((ieee->iw_mode == IW_MODE_MASTER ||
1106              ieee->iw_mode == IW_MODE_REPEAT) &&
1107             !from_assoc_ap) {
1108                 switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats,
1109                                              wds != NULL)) {
1110                 case AP_RX_CONTINUE_NOT_AUTHORIZED:
1111                 case AP_RX_CONTINUE:
1112                         break;
1113                 case AP_RX_DROP:
1114                         goto rx_dropped;
1115                 case AP_RX_EXIT:
1116                         goto rx_exit;
1117                 }
1118         }
1119 #endif
1120         //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
1121         /* Nullfunc frames may have PS-bit set, so they must be passed to
1122          * hostap_handle_sta_rx() before being dropped here. */
1123         if (stype != IEEE80211_STYPE_DATA &&
1124             stype != IEEE80211_STYPE_DATA_CFACK &&
1125             stype != IEEE80211_STYPE_DATA_CFPOLL &&
1126             stype != IEEE80211_STYPE_DATA_CFACKPOLL&&
1127             stype != IEEE80211_STYPE_QOS_DATA//add by David,2006.8.4
1128             ) {
1129                 if (stype != IEEE80211_STYPE_NULLFUNC)
1130                         IEEE80211_DEBUG_DROP(
1131                                 "RX: dropped data frame "
1132                                 "with no data (type=0x%02x, "
1133                                 "subtype=0x%02x, len=%d)\n",
1134                                 type, stype, skb->len);
1135                 goto rx_dropped;
1136         }
1137         if (memcmp(bssid, ieee->current_network.bssid, ETH_ALEN))
1138                 goto rx_dropped;
1139
1140         /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
1141
1142         if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
1143             (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0)
1144         {
1145                 printk("decrypt frame error\n");
1146                 goto rx_dropped;
1147         }
1148
1149
1150         hdr = (struct rtl_80211_hdr_4addr *) skb->data;
1151
1152         /* skb: hdr + (possibly fragmented) plaintext payload */
1153         // PR: FIXME: hostap has additional conditions in the "if" below:
1154         // ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
1155         if ((frag != 0 || (fc & IEEE80211_FCTL_MOREFRAGS))) {
1156                 int flen;
1157                 struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr);
1158                 IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
1159
1160                 if (!frag_skb) {
1161                         IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG,
1162                                         "Rx cannot get skb from fragment "
1163                                         "cache (morefrag=%d seq=%u frag=%u)\n",
1164                                         (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
1165                                         WLAN_GET_SEQ_SEQ(sc), frag);
1166                         goto rx_dropped;
1167                 }
1168                 flen = skb->len;
1169                 if (frag != 0)
1170                         flen -= hdrlen;
1171
1172                 if (frag_skb->tail + flen > frag_skb->end) {
1173                         printk(KERN_WARNING "%s: host decrypted and "
1174                                "reassembled frame did not fit skb\n",
1175                                dev->name);
1176                         ieee80211_frag_cache_invalidate(ieee, hdr);
1177                         goto rx_dropped;
1178                 }
1179
1180                 if (frag == 0) {
1181                         /* copy first fragment (including full headers) into
1182                          * beginning of the fragment cache skb */
1183                         skb_put_data(frag_skb, skb->data, flen);
1184                 } else {
1185                         /* append frame payload to the end of the fragment
1186                          * cache skb */
1187                         skb_put_data(frag_skb, skb->data + hdrlen, flen);
1188                 }
1189                 dev_kfree_skb_any(skb);
1190                 skb = NULL;
1191
1192                 if (fc & IEEE80211_FCTL_MOREFRAGS) {
1193                         /* more fragments expected - leave the skb in fragment
1194                          * cache for now; it will be delivered to upper layers
1195                          * after all fragments have been received */
1196                         goto rx_exit;
1197                 }
1198
1199                 /* this was the last fragment and the frame will be
1200                  * delivered, so remove skb from fragment cache */
1201                 skb = frag_skb;
1202                 hdr = (struct rtl_80211_hdr_4addr *) skb->data;
1203                 ieee80211_frag_cache_invalidate(ieee, hdr);
1204         }
1205
1206         /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
1207          * encrypted/authenticated */
1208         if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
1209             ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
1210         {
1211                 printk("==>decrypt msdu error\n");
1212                 goto rx_dropped;
1213         }
1214
1215         //added by amy for AP roaming
1216         ieee->LinkDetectInfo.NumRecvDataInPeriod++;
1217         ieee->LinkDetectInfo.NumRxOkInPeriod++;
1218
1219         hdr = (struct rtl_80211_hdr_4addr *) skb->data;
1220         if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep) {
1221                 if (/*ieee->ieee802_1x &&*/
1222                     ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1223
1224 #ifdef CONFIG_IEEE80211_DEBUG
1225                         /* pass unencrypted EAPOL frames even if encryption is
1226                          * configured */
1227                         struct eapol *eap = (struct eapol *)(skb->data +
1228                                 24);
1229                         IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1230                                                 eap_get_type(eap->type));
1231 #endif
1232                 } else {
1233                         IEEE80211_DEBUG_DROP(
1234                                 "encryption configured, but RX "
1235                                 "frame not encrypted (SA=%pM)\n",
1236                                 hdr->addr2);
1237                         goto rx_dropped;
1238                 }
1239         }
1240
1241 #ifdef CONFIG_IEEE80211_DEBUG
1242         if (crypt && !(fc & IEEE80211_FCTL_WEP) &&
1243             ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1244                         struct eapol *eap = (struct eapol *)(skb->data +
1245                                 24);
1246                         IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1247                                                 eap_get_type(eap->type));
1248         }
1249 #endif
1250
1251         if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep &&
1252             !ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1253                 IEEE80211_DEBUG_DROP(
1254                         "dropped unencrypted RX data "
1255                         "frame from %pM"
1256                         " (drop_unencrypted=1)\n",
1257                         hdr->addr2);
1258                 goto rx_dropped;
1259         }
1260 /*
1261         if(ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1262                 printk(KERN_WARNING "RX: IEEE802.1X EPAOL frame!\n");
1263         }
1264 */
1265 //added by amy for reorder
1266         if (ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data)
1267                 && !is_multicast_ether_addr(hdr->addr1))
1268         {
1269                 TID = Frame_QoSTID(skb->data);
1270                 SeqNum = WLAN_GET_SEQ_SEQ(sc);
1271                 GetTs(ieee,(PTS_COMMON_INFO *) &pTS,hdr->addr2,TID,RX_DIR,true);
1272                 if (TID !=0 && TID !=3)
1273                 {
1274                         ieee->bis_any_nonbepkts = true;
1275                 }
1276         }
1277 //added by amy for reorder
1278         /* skb: hdr + (possible reassembled) full plaintext payload */
1279         payload = skb->data + hdrlen;
1280         //ethertype = (payload[6] << 8) | payload[7];
1281         rxb = kmalloc(sizeof(struct ieee80211_rxb), GFP_ATOMIC);
1282         if (!rxb)
1283                 goto rx_dropped;
1284         /* to parse amsdu packets */
1285         /* qos data packets & reserved bit is 1 */
1286         if (parse_subframe(skb, rx_stats, rxb, src, dst) == 0) {
1287                 /* only to free rxb, and not submit the packets to upper layer */
1288                 for(i =0; i < rxb->nr_subframes; i++) {
1289                         dev_kfree_skb(rxb->subframes[i]);
1290                 }
1291                 kfree(rxb);
1292                 rxb = NULL;
1293                 goto rx_dropped;
1294         }
1295
1296 //added by amy for reorder
1297         if (!ieee->pHTInfo->bCurRxReorderEnable || pTS == NULL){
1298 //added by amy for reorder
1299                 for(i = 0; i<rxb->nr_subframes; i++) {
1300                         struct sk_buff *sub_skb = rxb->subframes[i];
1301
1302                         if (sub_skb) {
1303                                 /* convert hdr + possible LLC headers into Ethernet header */
1304                                 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
1305                                 if (sub_skb->len >= 8 &&
1306                                                 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
1307                                                   ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
1308                                                  memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
1309                                         /* remove RFC1042 or Bridge-Tunnel encapsulation and
1310                                          * replace EtherType */
1311                                         skb_pull(sub_skb, SNAP_SIZE);
1312                                         memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
1313                                         memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
1314                                 } else {
1315                                         u16 len;
1316                                         /* Leave Ethernet header part of hdr and full payload */
1317                                         len = be16_to_cpu(htons(sub_skb->len));
1318                                         memcpy(skb_push(sub_skb, 2), &len, 2);
1319                                         memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
1320                                         memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
1321                                 }
1322
1323                                 stats->rx_packets++;
1324                                 stats->rx_bytes += sub_skb->len;
1325                                 if (is_multicast_ether_addr(dst)) {
1326                                         stats->multicast++;
1327                                 }
1328
1329                                 /* Indicat the packets to upper layer */
1330                                 sub_skb->protocol = eth_type_trans(sub_skb, dev);
1331                                 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
1332                                 sub_skb->dev = dev;
1333                                 sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
1334                                 //skb->ip_summed = CHECKSUM_UNNECESSARY; /* 802.11 crc not sufficient */
1335                                 ieee->last_rx_ps_time = jiffies;
1336                                 netif_rx(sub_skb);
1337                         }
1338                 }
1339                 kfree(rxb);
1340                 rxb = NULL;
1341
1342         }
1343         else
1344         {
1345                 IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): REORDER ENABLE AND PTS not NULL, and we will enter RxReorderIndicatePacket()\n",__func__);
1346                 RxReorderIndicatePacket(ieee, rxb, pTS, SeqNum);
1347         }
1348 #ifndef JOHN_NOCPY
1349         dev_kfree_skb(skb);
1350 #endif
1351
1352  rx_exit:
1353 #ifdef NOT_YET
1354         if (sta)
1355                 hostap_handle_sta_release(sta);
1356 #endif
1357         return 1;
1358
1359  rx_dropped:
1360         kfree(rxb);
1361         rxb = NULL;
1362         stats->rx_dropped++;
1363
1364         /* Returning 0 indicates to caller that we have not handled the SKB--
1365          * so it is still allocated and can be used again by underlying
1366          * hardware as a DMA target */
1367         return 0;
1368 }
1369 EXPORT_SYMBOL(ieee80211_rx);
1370
1371 #define MGMT_FRAME_FIXED_PART_LENGTH            0x24
1372
1373 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
1374
1375 /*
1376 * Make the structure we read from the beacon packet to have
1377 * the right values
1378 */
1379 static int ieee80211_verify_qos_info(struct ieee80211_qos_information_element
1380                                      *info_element, int sub_type)
1381 {
1382
1383         if (info_element->qui_subtype != sub_type)
1384                 return -1;
1385         if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
1386                 return -1;
1387         if (info_element->qui_type != QOS_OUI_TYPE)
1388                 return -1;
1389         if (info_element->version != QOS_VERSION_1)
1390                 return -1;
1391
1392         return 0;
1393 }
1394
1395
1396 /*
1397  * Parse a QoS parameter element
1398  */
1399 static int ieee80211_read_qos_param_element(struct ieee80211_qos_parameter_info
1400                                             *element_param, struct ieee80211_info_element
1401                                             *info_element)
1402 {
1403         int ret = 0;
1404         u16 size = sizeof(struct ieee80211_qos_parameter_info) - 2;
1405
1406         if ((info_element == NULL) || (element_param == NULL))
1407                 return -1;
1408
1409         if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
1410                 memcpy(element_param->info_element.qui, info_element->data,
1411                        info_element->len);
1412                 element_param->info_element.elementID = info_element->id;
1413                 element_param->info_element.length = info_element->len;
1414         } else
1415                 ret = -1;
1416         if (ret == 0)
1417                 ret = ieee80211_verify_qos_info(&element_param->info_element,
1418                                                 QOS_OUI_PARAM_SUB_TYPE);
1419         return ret;
1420 }
1421
1422 /*
1423  * Parse a QoS information element
1424  */
1425 static int ieee80211_read_qos_info_element(struct
1426                                            ieee80211_qos_information_element
1427                                            *element_info, struct ieee80211_info_element
1428                                            *info_element)
1429 {
1430         int ret = 0;
1431         u16 size = sizeof(struct ieee80211_qos_information_element) - 2;
1432
1433         if (element_info == NULL)
1434                 return -1;
1435         if (info_element == NULL)
1436                 return -1;
1437
1438         if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
1439                 memcpy(element_info->qui, info_element->data,
1440                        info_element->len);
1441                 element_info->elementID = info_element->id;
1442                 element_info->length = info_element->len;
1443         } else
1444                 ret = -1;
1445
1446         if (ret == 0)
1447                 ret = ieee80211_verify_qos_info(element_info,
1448                                                 QOS_OUI_INFO_SUB_TYPE);
1449         return ret;
1450 }
1451
1452
1453 /*
1454  * Write QoS parameters from the ac parameters.
1455  */
1456 static int ieee80211_qos_convert_ac_to_parameters(struct
1457                                                   ieee80211_qos_parameter_info
1458                                                   *param_elm, struct
1459                                                   ieee80211_qos_parameters
1460                                                   *qos_param)
1461 {
1462         int i;
1463         struct ieee80211_qos_ac_parameter *ac_params;
1464         u8 aci;
1465         //u8 cw_min;
1466         //u8 cw_max;
1467
1468         for (i = 0; i < QOS_QUEUE_NUM; i++) {
1469                 ac_params = &(param_elm->ac_params_record[i]);
1470
1471                 aci = (ac_params->aci_aifsn & 0x60) >> 5;
1472
1473                 if(aci >= QOS_QUEUE_NUM)
1474                         continue;
1475                 qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f;
1476
1477                 /* WMM spec P.11: The minimum value for AIFSN shall be 2 */
1478                 qos_param->aifs[aci] = (qos_param->aifs[aci] < 2) ? 2:qos_param->aifs[aci];
1479
1480                 qos_param->cw_min[aci] =
1481                     cpu_to_le16(ac_params->ecw_min_max & 0x0F);
1482
1483                 qos_param->cw_max[aci] =
1484                     cpu_to_le16((ac_params->ecw_min_max & 0xF0) >> 4);
1485
1486                 qos_param->flag[aci] =
1487                     (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1488                 qos_param->tx_op_limit[aci] = ac_params->tx_op_limit;
1489         }
1490         return 0;
1491 }
1492
1493 /*
1494  * we have a generic data element which it may contain QoS information or
1495  * parameters element. check the information element length to decide
1496  * which type to read
1497  */
1498 static int ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element
1499                                              *info_element,
1500                                              struct ieee80211_network *network)
1501 {
1502         int rc = 0;
1503         struct ieee80211_qos_parameters *qos_param = NULL;
1504         struct ieee80211_qos_information_element qos_info_element;
1505
1506         rc = ieee80211_read_qos_info_element(&qos_info_element, info_element);
1507
1508         if (rc == 0) {
1509                 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1510                 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1511         } else {
1512                 struct ieee80211_qos_parameter_info param_element;
1513
1514                 rc = ieee80211_read_qos_param_element(&param_element,
1515                                                       info_element);
1516                 if (rc == 0) {
1517                         qos_param = &(network->qos_data.parameters);
1518                         ieee80211_qos_convert_ac_to_parameters(&param_element,
1519                                                                qos_param);
1520                         network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1521                         network->qos_data.param_count =
1522                             param_element.info_element.ac_info & 0x0F;
1523                 }
1524         }
1525
1526         if (rc == 0) {
1527                 IEEE80211_DEBUG_QOS("QoS is supported\n");
1528                 network->qos_data.supported = 1;
1529         }
1530         return rc;
1531 }
1532
1533 #ifdef CONFIG_IEEE80211_DEBUG
1534 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
1535
1536 static const char *get_info_element_string(u16 id)
1537 {
1538         switch (id) {
1539                 MFIE_STRING(SSID);
1540                 MFIE_STRING(RATES);
1541                 MFIE_STRING(FH_SET);
1542                 MFIE_STRING(DS_SET);
1543                 MFIE_STRING(CF_SET);
1544                 MFIE_STRING(TIM);
1545                 MFIE_STRING(IBSS_SET);
1546                 MFIE_STRING(COUNTRY);
1547                 MFIE_STRING(HOP_PARAMS);
1548                 MFIE_STRING(HOP_TABLE);
1549                 MFIE_STRING(REQUEST);
1550                 MFIE_STRING(CHALLENGE);
1551                 MFIE_STRING(POWER_CONSTRAINT);
1552                 MFIE_STRING(POWER_CAPABILITY);
1553                 MFIE_STRING(TPC_REQUEST);
1554                 MFIE_STRING(TPC_REPORT);
1555                 MFIE_STRING(SUPP_CHANNELS);
1556                 MFIE_STRING(CSA);
1557                 MFIE_STRING(MEASURE_REQUEST);
1558                 MFIE_STRING(MEASURE_REPORT);
1559                 MFIE_STRING(QUIET);
1560                 MFIE_STRING(IBSS_DFS);
1561                // MFIE_STRING(ERP_INFO);
1562                 MFIE_STRING(RSN);
1563                 MFIE_STRING(RATES_EX);
1564                 MFIE_STRING(GENERIC);
1565                 MFIE_STRING(QOS_PARAMETER);
1566         default:
1567                 return "UNKNOWN";
1568         }
1569 }
1570 #endif
1571
1572 static inline void ieee80211_extract_country_ie(
1573         struct ieee80211_device *ieee,
1574         struct ieee80211_info_element *info_element,
1575         struct ieee80211_network *network,
1576         u8 *addr2
1577 )
1578 {
1579         if (IS_DOT11D_ENABLE(ieee))
1580         {
1581                 if (info_element->len!= 0)
1582                 {
1583                         memcpy(network->CountryIeBuf, info_element->data, info_element->len);
1584                         network->CountryIeLen = info_element->len;
1585
1586                         if (!IS_COUNTRY_IE_VALID(ieee))
1587                         {
1588                                 Dot11d_UpdateCountryIe(ieee, addr2, info_element->len, info_element->data);
1589                         }
1590                 }
1591
1592                 //
1593                 // 070305, rcnjko: I update country IE watch dog here because
1594                 // some AP (e.g. Cisco 1242) don't include country IE in their
1595                 // probe response frame.
1596                 //
1597                 if (IS_EQUAL_CIE_SRC(ieee, addr2) )
1598                 {
1599                         UPDATE_CIE_WATCHDOG(ieee);
1600                 }
1601         }
1602
1603 }
1604
1605 int ieee80211_parse_info_param(struct ieee80211_device *ieee,
1606                 struct ieee80211_info_element *info_element,
1607                 u16 length,
1608                 struct ieee80211_network *network,
1609                 struct ieee80211_rx_stats *stats)
1610 {
1611         u8 i;
1612         short offset;
1613         u16     tmp_htcap_len=0;
1614         u16     tmp_htinfo_len=0;
1615         u16 ht_realtek_agg_len=0;
1616         u8  ht_realtek_agg_buf[MAX_IE_LEN];
1617 //      u16 broadcom_len = 0;
1618 #ifdef CONFIG_IEEE80211_DEBUG
1619         char rates_str[64];
1620         char *p;
1621 #endif
1622
1623         while (length >= sizeof(*info_element)) {
1624                 if (sizeof(*info_element) + info_element->len > length) {
1625                         IEEE80211_DEBUG_MGMT("Info elem: parse failed: "
1626                                              "info_element->len + 2 > left : "
1627                                              "info_element->len+2=%zd left=%d, id=%d.\n",
1628                                              info_element->len +
1629                                              sizeof(*info_element),
1630                                              length, info_element->id);
1631                         /* We stop processing but don't return an error here
1632                          * because some misbehaviour APs break this rule. ie.
1633                          * Orinoco AP1000. */
1634                         break;
1635                 }
1636
1637                 switch (info_element->id) {
1638                 case MFIE_TYPE_SSID:
1639                         if (ieee80211_is_empty_essid(info_element->data,
1640                                                      info_element->len)) {
1641                                 network->flags |= NETWORK_EMPTY_ESSID;
1642                                 break;
1643                         }
1644
1645                         network->ssid_len = min(info_element->len,
1646                                                 (u8) IW_ESSID_MAX_SIZE);
1647                         memcpy(network->ssid, info_element->data, network->ssid_len);
1648                         if (network->ssid_len < IW_ESSID_MAX_SIZE)
1649                                 memset(network->ssid + network->ssid_len, 0,
1650                                        IW_ESSID_MAX_SIZE - network->ssid_len);
1651
1652                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
1653                                              network->ssid, network->ssid_len);
1654                         break;
1655
1656                 case MFIE_TYPE_RATES:
1657 #ifdef CONFIG_IEEE80211_DEBUG
1658                         p = rates_str;
1659 #endif
1660                         network->rates_len = min(info_element->len,
1661                                                  MAX_RATES_LENGTH);
1662                         for (i = 0; i < network->rates_len; i++) {
1663                                 network->rates[i] = info_element->data[i];
1664 #ifdef CONFIG_IEEE80211_DEBUG
1665                                 p += snprintf(p, sizeof(rates_str) -
1666                                               (p - rates_str), "%02X ",
1667                                               network->rates[i]);
1668 #endif
1669                                 if (ieee80211_is_ofdm_rate
1670                                     (info_element->data[i])) {
1671                                         network->flags |= NETWORK_HAS_OFDM;
1672                                         if (info_element->data[i] &
1673                                             IEEE80211_BASIC_RATE_MASK)
1674                                                 network->flags &=
1675                                                     ~NETWORK_HAS_CCK;
1676                                 }
1677                         }
1678
1679                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
1680                                              rates_str, network->rates_len);
1681                         break;
1682
1683                 case MFIE_TYPE_RATES_EX:
1684 #ifdef CONFIG_IEEE80211_DEBUG
1685                         p = rates_str;
1686 #endif
1687                         network->rates_ex_len = min(info_element->len,
1688                                                     MAX_RATES_EX_LENGTH);
1689                         for (i = 0; i < network->rates_ex_len; i++) {
1690                                 network->rates_ex[i] = info_element->data[i];
1691 #ifdef CONFIG_IEEE80211_DEBUG
1692                                 p += snprintf(p, sizeof(rates_str) -
1693                                               (p - rates_str), "%02X ",
1694                                               network->rates_ex[i]);
1695 #endif
1696                                 if (ieee80211_is_ofdm_rate
1697                                     (info_element->data[i])) {
1698                                         network->flags |= NETWORK_HAS_OFDM;
1699                                         if (info_element->data[i] &
1700                                             IEEE80211_BASIC_RATE_MASK)
1701                                                 network->flags &=
1702                                                     ~NETWORK_HAS_CCK;
1703                                 }
1704                         }
1705
1706                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1707                                              rates_str, network->rates_ex_len);
1708                         break;
1709
1710                 case MFIE_TYPE_DS_SET:
1711                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
1712                                              info_element->data[0]);
1713                         network->channel = info_element->data[0];
1714                         break;
1715
1716                 case MFIE_TYPE_FH_SET:
1717                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
1718                         break;
1719
1720                 case MFIE_TYPE_CF_SET:
1721                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
1722                         break;
1723
1724                 case MFIE_TYPE_TIM:
1725                         if(info_element->len < 4)
1726                                 break;
1727
1728                         network->tim.tim_count = info_element->data[0];
1729                         network->tim.tim_period = info_element->data[1];
1730
1731                         network->dtim_period = info_element->data[1];
1732                         if(ieee->state != IEEE80211_LINKED)
1733                                 break;
1734
1735                         network->last_dtim_sta_time[0] = stats->mac_time[0];
1736                         network->last_dtim_sta_time[1] = stats->mac_time[1];
1737
1738                         network->dtim_data = IEEE80211_DTIM_VALID;
1739
1740                         if(info_element->data[0] != 0)
1741                                 break;
1742
1743                         if(info_element->data[2] & 1)
1744                                 network->dtim_data |= IEEE80211_DTIM_MBCAST;
1745
1746                         offset = (info_element->data[2] >> 1)*2;
1747
1748                         if(ieee->assoc_id < 8*offset ||
1749                                 ieee->assoc_id > 8*(offset + info_element->len -3))
1750
1751                                 break;
1752
1753                         offset = (ieee->assoc_id / 8) - offset;// + ((aid % 8)? 0 : 1) ;
1754
1755                         if(info_element->data[3+offset] & (1<<(ieee->assoc_id%8)))
1756                                 network->dtim_data |= IEEE80211_DTIM_UCAST;
1757
1758                         //IEEE80211_DEBUG_MGMT("MFIE_TYPE_TIM: partially ignored\n");
1759                         break;
1760
1761                 case MFIE_TYPE_ERP:
1762                         network->erp_value = info_element->data[0];
1763                         network->flags |= NETWORK_HAS_ERP_VALUE;
1764                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1765                                              network->erp_value);
1766                         break;
1767                 case MFIE_TYPE_IBSS_SET:
1768                         network->atim_window = info_element->data[0];
1769                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
1770                                              network->atim_window);
1771                         break;
1772
1773                 case MFIE_TYPE_CHALLENGE:
1774                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
1775                         break;
1776
1777                 case MFIE_TYPE_GENERIC:
1778                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
1779                                              info_element->len);
1780                         if (!ieee80211_parse_qos_info_param_IE(info_element,
1781                                                                network))
1782                                 break;
1783
1784                         if (info_element->len >= 4 &&
1785                             info_element->data[0] == 0x00 &&
1786                             info_element->data[1] == 0x50 &&
1787                             info_element->data[2] == 0xf2 &&
1788                             info_element->data[3] == 0x01) {
1789                                 network->wpa_ie_len = min(info_element->len + 2,
1790                                                           MAX_WPA_IE_LEN);
1791                                 memcpy(network->wpa_ie, info_element,
1792                                        network->wpa_ie_len);
1793                                 break;
1794                         }
1795
1796 #ifdef THOMAS_TURBO
1797                         if (info_element->len == 7 &&
1798                             info_element->data[0] == 0x00 &&
1799                             info_element->data[1] == 0xe0 &&
1800                             info_element->data[2] == 0x4c &&
1801                             info_element->data[3] == 0x01 &&
1802                             info_element->data[4] == 0x02) {
1803                                 network->Turbo_Enable = 1;
1804                         }
1805 #endif
1806
1807                         //for HTcap and HTinfo parameters
1808                         if(tmp_htcap_len == 0){
1809                                 if(info_element->len >= 4 &&
1810                                    info_element->data[0] == 0x00 &&
1811                                    info_element->data[1] == 0x90 &&
1812                                    info_element->data[2] == 0x4c &&
1813                                    info_element->data[3] == 0x033){
1814
1815                                                 tmp_htcap_len = min(info_element->len,(u8)MAX_IE_LEN);
1816                                                 if(tmp_htcap_len != 0){
1817                                                         network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1818                                                         network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf)?\
1819                                                                 sizeof(network->bssht.bdHTCapBuf):tmp_htcap_len;
1820                                                         memcpy(network->bssht.bdHTCapBuf,info_element->data,network->bssht.bdHTCapLen);
1821                                                 }
1822                                 }
1823                                 if(tmp_htcap_len != 0)
1824                                         network->bssht.bdSupportHT = true;
1825                                 else
1826                                         network->bssht.bdSupportHT = false;
1827                         }
1828
1829
1830                         if(tmp_htinfo_len == 0){
1831                                 if(info_element->len >= 4 &&
1832                                         info_element->data[0] == 0x00 &&
1833                                         info_element->data[1] == 0x90 &&
1834                                         info_element->data[2] == 0x4c &&
1835                                         info_element->data[3] == 0x034){
1836
1837                                                 tmp_htinfo_len = min(info_element->len,(u8)MAX_IE_LEN);
1838                                                 if(tmp_htinfo_len != 0){
1839                                                         network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1840                                                         if(tmp_htinfo_len){
1841                                                                 network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf)?\
1842                                                                         sizeof(network->bssht.bdHTInfoBuf):tmp_htinfo_len;
1843                                                                 memcpy(network->bssht.bdHTInfoBuf,info_element->data,network->bssht.bdHTInfoLen);
1844                                                         }
1845
1846                                                 }
1847
1848                                 }
1849                         }
1850
1851                         if(ieee->aggregation){
1852                                 if(network->bssht.bdSupportHT){
1853                                         if(info_element->len >= 4 &&
1854                                                 info_element->data[0] == 0x00 &&
1855                                                 info_element->data[1] == 0xe0 &&
1856                                                 info_element->data[2] == 0x4c &&
1857                                                 info_element->data[3] == 0x02){
1858
1859                                                 ht_realtek_agg_len = min(info_element->len,(u8)MAX_IE_LEN);
1860                                                 memcpy(ht_realtek_agg_buf,info_element->data,info_element->len);
1861
1862                                         }
1863                                         if(ht_realtek_agg_len >= 5){
1864                                                 network->bssht.bdRT2RTAggregation = true;
1865
1866                                                 if((ht_realtek_agg_buf[4] == 1) && (ht_realtek_agg_buf[5] & 0x02))
1867                                                 network->bssht.bdRT2RTLongSlotTime = true;
1868                                         }
1869                                 }
1870
1871                         }
1872
1873                         //if(tmp_htcap_len !=0  ||  tmp_htinfo_len != 0)
1874                         {
1875                                 if ((info_element->len >= 3 &&
1876                                          info_element->data[0] == 0x00 &&
1877                                          info_element->data[1] == 0x05 &&
1878                                          info_element->data[2] == 0xb5) ||
1879                                          (info_element->len >= 3 &&
1880                                          info_element->data[0] == 0x00 &&
1881                                          info_element->data[1] == 0x0a &&
1882                                          info_element->data[2] == 0xf7) ||
1883                                          (info_element->len >= 3 &&
1884                                          info_element->data[0] == 0x00 &&
1885                                          info_element->data[1] == 0x10 &&
1886                                          info_element->data[2] == 0x18)){
1887
1888                                                 network->broadcom_cap_exist = true;
1889
1890                                 }
1891                         }
1892                         if(info_element->len >= 3 &&
1893                                 info_element->data[0] == 0x00 &&
1894                                 info_element->data[1] == 0x0c &&
1895                                 info_element->data[2] == 0x43)
1896                         {
1897                                 network->ralink_cap_exist = true;
1898                         }
1899                         else
1900                                 network->ralink_cap_exist = false;
1901                         //added by amy for atheros AP
1902                         if((info_element->len >= 3 &&
1903                                 info_element->data[0] == 0x00 &&
1904                                 info_element->data[1] == 0x03 &&
1905                                 info_element->data[2] == 0x7f) ||
1906                                 (info_element->len >= 3 &&
1907                                 info_element->data[0] == 0x00 &&
1908                                 info_element->data[1] == 0x13 &&
1909                                 info_element->data[2] == 0x74))
1910                         {
1911                                 printk("========>%s(): athros AP is exist\n",__func__);
1912                                 network->atheros_cap_exist = true;
1913                         }
1914                         else
1915                                 network->atheros_cap_exist = false;
1916
1917                         if(info_element->len >= 3 &&
1918                                 info_element->data[0] == 0x00 &&
1919                                 info_element->data[1] == 0x40 &&
1920                                 info_element->data[2] == 0x96)
1921                         {
1922                                 network->cisco_cap_exist = true;
1923                         }
1924                         else
1925                                 network->cisco_cap_exist = false;
1926                         //added by amy for LEAP of cisco
1927                         if (info_element->len > 4 &&
1928                                 info_element->data[0] == 0x00 &&
1929                                 info_element->data[1] == 0x40 &&
1930                                 info_element->data[2] == 0x96 &&
1931                                 info_element->data[3] == 0x01)
1932                         {
1933                                 if(info_element->len == 6)
1934                                 {
1935                                         memcpy(network->CcxRmState, &info_element[4], 2);
1936                                         if(network->CcxRmState[0] != 0)
1937                                         {
1938                                                 network->bCcxRmEnable = true;
1939                                         }
1940                                         else
1941                                                 network->bCcxRmEnable = false;
1942                                         //
1943                                         // CCXv4 Table 59-1 MBSSID Masks.
1944                                         //
1945                                         network->MBssidMask = network->CcxRmState[1] & 0x07;
1946                                         if(network->MBssidMask != 0)
1947                                         {
1948                                                 network->bMBssidValid = true;
1949                                                 network->MBssidMask = 0xff << (network->MBssidMask);
1950                                                 cpMacAddr(network->MBssid, network->bssid);
1951                                                 network->MBssid[5] &= network->MBssidMask;
1952                                         }
1953                                         else
1954                                         {
1955                                                 network->bMBssidValid = false;
1956                                         }
1957                                 }
1958                                 else
1959                                 {
1960                                         network->bCcxRmEnable = false;
1961                                 }
1962                         }
1963                         if (info_element->len > 4  &&
1964                                 info_element->data[0] == 0x00 &&
1965                                 info_element->data[1] == 0x40 &&
1966                                 info_element->data[2] == 0x96 &&
1967                                 info_element->data[3] == 0x03)
1968                         {
1969                                 if(info_element->len == 5)
1970                                 {
1971                                         network->bWithCcxVerNum = true;
1972                                         network->BssCcxVerNumber = info_element->data[4];
1973                                 }
1974                                 else
1975                                 {
1976                                         network->bWithCcxVerNum = false;
1977                                         network->BssCcxVerNumber = 0;
1978                                 }
1979                         }
1980                         break;
1981
1982                 case MFIE_TYPE_RSN:
1983                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
1984                                              info_element->len);
1985                         network->rsn_ie_len = min(info_element->len + 2,
1986                                                   MAX_WPA_IE_LEN);
1987                         memcpy(network->rsn_ie, info_element,
1988                                network->rsn_ie_len);
1989                         break;
1990
1991                         //HT related element.
1992                 case MFIE_TYPE_HT_CAP:
1993                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_HT_CAP: %d bytes\n",
1994                                              info_element->len);
1995                         tmp_htcap_len = min(info_element->len,(u8)MAX_IE_LEN);
1996                         if(tmp_htcap_len != 0){
1997                                 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1998                                 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf)?\
1999                                         sizeof(network->bssht.bdHTCapBuf):tmp_htcap_len;
2000                                 memcpy(network->bssht.bdHTCapBuf,info_element->data,network->bssht.bdHTCapLen);
2001
2002                                 //If peer is HT, but not WMM, call QosSetLegacyWMMParamWithHT()
2003                                 // windows driver will update WMM parameters each beacon received once connected
2004                                 // Linux driver is a bit different.
2005                                 network->bssht.bdSupportHT = true;
2006                         }
2007                         else
2008                                 network->bssht.bdSupportHT = false;
2009                         break;
2010
2011
2012                 case MFIE_TYPE_HT_INFO:
2013                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_HT_INFO: %d bytes\n",
2014                                              info_element->len);
2015                         tmp_htinfo_len = min(info_element->len,(u8)MAX_IE_LEN);
2016                         if(tmp_htinfo_len){
2017                                 network->bssht.bdHTSpecVer = HT_SPEC_VER_IEEE;
2018                                 network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf)?\
2019                                         sizeof(network->bssht.bdHTInfoBuf):tmp_htinfo_len;
2020                                 memcpy(network->bssht.bdHTInfoBuf,info_element->data,network->bssht.bdHTInfoLen);
2021                         }
2022                         break;
2023
2024                 case MFIE_TYPE_AIRONET:
2025                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_AIRONET: %d bytes\n",
2026                                              info_element->len);
2027                         if(info_element->len >IE_CISCO_FLAG_POSITION)
2028                         {
2029                                 network->bWithAironetIE = true;
2030
2031                                 // CCX 1 spec v1.13, A01.1 CKIP Negotiation (page23):
2032                                 // "A Cisco access point advertises support for CKIP in beacon and probe response packets,
2033                                 //  by adding an Aironet element and setting one or both of the CKIP negotiation bits."
2034                                 if(     (info_element->data[IE_CISCO_FLAG_POSITION]&SUPPORT_CKIP_MIC)   ||
2035                                         (info_element->data[IE_CISCO_FLAG_POSITION]&SUPPORT_CKIP_PK)    )
2036                                 {
2037                                         network->bCkipSupported = true;
2038                                 }
2039                                 else
2040                                 {
2041                                         network->bCkipSupported = false;
2042                                 }
2043                         }
2044                         else
2045                         {
2046                                 network->bWithAironetIE = false;
2047                                 network->bCkipSupported = false;
2048                         }
2049                         break;
2050                 case MFIE_TYPE_QOS_PARAMETER:
2051                         printk(KERN_ERR
2052                                "QoS Error need to parse QOS_PARAMETER IE\n");
2053                         break;
2054
2055                 case MFIE_TYPE_COUNTRY:
2056                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_COUNTRY: %d bytes\n",
2057                                              info_element->len);
2058                         ieee80211_extract_country_ie(ieee, info_element, network, network->bssid);//addr2 is same as addr3 when from an AP
2059                         break;
2060 /* TODO */
2061                 default:
2062                         IEEE80211_DEBUG_MGMT
2063                             ("Unsupported info element: %s (%d)\n",
2064                              get_info_element_string(info_element->id),
2065                              info_element->id);
2066                         break;
2067                 }
2068
2069                 length -= sizeof(*info_element) + info_element->len;
2070                 info_element =
2071                     (struct ieee80211_info_element *)&info_element->
2072                     data[info_element->len];
2073         }
2074
2075         if(!network->atheros_cap_exist && !network->broadcom_cap_exist &&
2076                 !network->cisco_cap_exist && !network->ralink_cap_exist && !network->bssht.bdRT2RTAggregation)
2077         {
2078                 network->unknown_cap_exist = true;
2079         }
2080         else
2081         {
2082                 network->unknown_cap_exist = false;
2083         }
2084         return 0;
2085 }
2086
2087 static inline u8 ieee80211_SignalStrengthTranslate(
2088         u8  CurrSS
2089         )
2090 {
2091         u8 RetSS;
2092
2093         // Step 1. Scale mapping.
2094         if(CurrSS >= 71 && CurrSS <= 100)
2095         {
2096                 RetSS = 90 + ((CurrSS - 70) / 3);
2097         }
2098         else if(CurrSS >= 41 && CurrSS <= 70)
2099         {
2100                 RetSS = 78 + ((CurrSS - 40) / 3);
2101         }
2102         else if(CurrSS >= 31 && CurrSS <= 40)
2103         {
2104                 RetSS = 66 + (CurrSS - 30);
2105         }
2106         else if(CurrSS >= 21 && CurrSS <= 30)
2107         {
2108                 RetSS = 54 + (CurrSS - 20);
2109         }
2110         else if(CurrSS >= 5 && CurrSS <= 20)
2111         {
2112                 RetSS = 42 + (((CurrSS - 5) * 2) / 3);
2113         }
2114         else if(CurrSS == 4)
2115         {
2116                 RetSS = 36;
2117         }
2118         else if(CurrSS == 3)
2119         {
2120                 RetSS = 27;
2121         }
2122         else if(CurrSS == 2)
2123         {
2124                 RetSS = 18;
2125         }
2126         else if(CurrSS == 1)
2127         {
2128                 RetSS = 9;
2129         }
2130         else
2131         {
2132                 RetSS = CurrSS;
2133         }
2134         //RT_TRACE(COMP_DBG, DBG_LOUD, ("##### After Mapping:  LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS));
2135
2136         // Step 2. Smoothing.
2137
2138         //RT_TRACE(COMP_DBG, DBG_LOUD, ("$$$$$ After Smoothing:  LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS));
2139
2140         return RetSS;
2141 }
2142
2143 /* 0-100 index */
2144 static long ieee80211_translate_todbm(u8 signal_strength_index)
2145 {
2146         long    signal_power; // in dBm.
2147
2148         // Translate to dBm (x=0.5y-95).
2149         signal_power = (long)((signal_strength_index + 1) >> 1);
2150         signal_power -= 95;
2151
2152         return signal_power;
2153 }
2154
2155 static inline int ieee80211_network_init(
2156         struct ieee80211_device *ieee,
2157         struct ieee80211_probe_response *beacon,
2158         struct ieee80211_network *network,
2159         struct ieee80211_rx_stats *stats)
2160 {
2161 #ifdef CONFIG_IEEE80211_DEBUG
2162         //char rates_str[64];
2163         //char *p;
2164 #endif
2165
2166         network->qos_data.active = 0;
2167         network->qos_data.supported = 0;
2168         network->qos_data.param_count = 0;
2169         network->qos_data.old_param_count = 0;
2170
2171         /* Pull out fixed field data */
2172         memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
2173         network->capability = le16_to_cpu(beacon->capability);
2174         network->last_scanned = jiffies;
2175         network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
2176         network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
2177         network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
2178         /* Where to pull this? beacon->listen_interval;*/
2179         network->listen_interval = 0x0A;
2180         network->rates_len = network->rates_ex_len = 0;
2181         network->last_associate = 0;
2182         network->ssid_len = 0;
2183         network->flags = 0;
2184         network->atim_window = 0;
2185         network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
2186             0x3 : 0x0;
2187         network->berp_info_valid = false;
2188         network->broadcom_cap_exist = false;
2189         network->ralink_cap_exist = false;
2190         network->atheros_cap_exist = false;
2191         network->cisco_cap_exist = false;
2192         network->unknown_cap_exist = false;
2193 #ifdef THOMAS_TURBO
2194         network->Turbo_Enable = 0;
2195 #endif
2196         network->CountryIeLen = 0;
2197         memset(network->CountryIeBuf, 0, MAX_IE_LEN);
2198 //Initialize HT parameters
2199         //ieee80211_ht_initialize(&network->bssht);
2200         HTInitializeBssDesc(&network->bssht);
2201         if (stats->freq == IEEE80211_52GHZ_BAND) {
2202                 /* for A band (No DS info) */
2203                 network->channel = stats->received_channel;
2204         } else
2205                 network->flags |= NETWORK_HAS_CCK;
2206
2207         network->wpa_ie_len = 0;
2208         network->rsn_ie_len = 0;
2209
2210         if (ieee80211_parse_info_param
2211             (ieee,beacon->info_element, stats->len - sizeof(*beacon), network, stats))
2212                 return 1;
2213
2214         network->mode = 0;
2215         if (stats->freq == IEEE80211_52GHZ_BAND)
2216                 network->mode = IEEE_A;
2217         else {
2218                 if (network->flags & NETWORK_HAS_OFDM)
2219                         network->mode |= IEEE_G;
2220                 if (network->flags & NETWORK_HAS_CCK)
2221                         network->mode |= IEEE_B;
2222         }
2223
2224         if (network->mode == 0) {
2225                 IEEE80211_DEBUG_SCAN("Filtered out '%s (%pM)' "
2226                                      "network.\n",
2227                                      escape_essid(network->ssid,
2228                                                   network->ssid_len),
2229                                      network->bssid);
2230                 return 1;
2231         }
2232
2233         if(network->bssht.bdSupportHT){
2234                 if(network->mode == IEEE_A)
2235                         network->mode = IEEE_N_5G;
2236                 else if(network->mode & (IEEE_G | IEEE_B))
2237                         network->mode = IEEE_N_24G;
2238         }
2239         if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
2240                 network->flags |= NETWORK_EMPTY_ESSID;
2241
2242         stats->signal = 30 + (stats->SignalStrength * 70) / 100;
2243         //stats->signal = ieee80211_SignalStrengthTranslate(stats->signal);
2244         stats->noise = ieee80211_translate_todbm((u8)(100-stats->signal)) -25;
2245
2246         memcpy(&network->stats, stats, sizeof(network->stats));
2247
2248         return 0;
2249 }
2250
2251 static inline int is_same_network(struct ieee80211_network *src,
2252                                   struct ieee80211_network *dst, struct ieee80211_device *ieee)
2253 {
2254         /* A network is only a duplicate if the channel, BSSID, ESSID
2255          * and the capability field (in particular IBSS and BSS) all match.
2256          * We treat all <hidden> with the same BSSID and channel
2257          * as one network */
2258         return //((src->ssid_len == dst->ssid_len) &&
2259                 (((src->ssid_len == dst->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) &&
2260                 (src->channel == dst->channel) &&
2261                 !memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
2262                 //!memcmp(src->ssid, dst->ssid, src->ssid_len) &&
2263                 (!memcmp(src->ssid, dst->ssid, src->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) &&
2264                 ((src->capability & WLAN_CAPABILITY_IBSS) ==
2265                 (dst->capability & WLAN_CAPABILITY_IBSS)) &&
2266                 ((src->capability & WLAN_CAPABILITY_BSS) ==
2267                 (dst->capability & WLAN_CAPABILITY_BSS)));
2268 }
2269
2270 static inline void update_network(struct ieee80211_network *dst,
2271                                   struct ieee80211_network *src)
2272 {
2273         int qos_active;
2274         u8 old_param;
2275
2276         memcpy(&dst->stats, &src->stats, sizeof(struct ieee80211_rx_stats));
2277         dst->capability = src->capability;
2278         memcpy(dst->rates, src->rates, src->rates_len);
2279         dst->rates_len = src->rates_len;
2280         memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
2281         dst->rates_ex_len = src->rates_ex_len;
2282         if (src->ssid_len > 0)
2283         {
2284                 memset(dst->ssid, 0, dst->ssid_len);
2285                 dst->ssid_len = src->ssid_len;
2286                 memcpy(dst->ssid, src->ssid, src->ssid_len);
2287         }
2288         dst->mode = src->mode;
2289         dst->flags = src->flags;
2290         dst->time_stamp[0] = src->time_stamp[0];
2291         dst->time_stamp[1] = src->time_stamp[1];
2292         if (src->flags & NETWORK_HAS_ERP_VALUE)
2293         {
2294                 dst->erp_value = src->erp_value;
2295                 dst->berp_info_valid = src->berp_info_valid = true;
2296         }
2297         dst->beacon_interval = src->beacon_interval;
2298         dst->listen_interval = src->listen_interval;
2299         dst->atim_window = src->atim_window;
2300         dst->dtim_period = src->dtim_period;
2301         dst->dtim_data = src->dtim_data;
2302         dst->last_dtim_sta_time[0] = src->last_dtim_sta_time[0];
2303         dst->last_dtim_sta_time[1] = src->last_dtim_sta_time[1];
2304         memcpy(&dst->tim, &src->tim, sizeof(struct ieee80211_tim_parameters));
2305
2306         dst->bssht.bdSupportHT = src->bssht.bdSupportHT;
2307         dst->bssht.bdRT2RTAggregation = src->bssht.bdRT2RTAggregation;
2308         dst->bssht.bdHTCapLen= src->bssht.bdHTCapLen;
2309         memcpy(dst->bssht.bdHTCapBuf,src->bssht.bdHTCapBuf,src->bssht.bdHTCapLen);
2310         dst->bssht.bdHTInfoLen= src->bssht.bdHTInfoLen;
2311         memcpy(dst->bssht.bdHTInfoBuf,src->bssht.bdHTInfoBuf,src->bssht.bdHTInfoLen);
2312         dst->bssht.bdHTSpecVer = src->bssht.bdHTSpecVer;
2313         dst->bssht.bdRT2RTLongSlotTime = src->bssht.bdRT2RTLongSlotTime;
2314         dst->broadcom_cap_exist = src->broadcom_cap_exist;
2315         dst->ralink_cap_exist = src->ralink_cap_exist;
2316         dst->atheros_cap_exist = src->atheros_cap_exist;
2317         dst->cisco_cap_exist = src->cisco_cap_exist;
2318         dst->unknown_cap_exist = src->unknown_cap_exist;
2319         memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
2320         dst->wpa_ie_len = src->wpa_ie_len;
2321         memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
2322         dst->rsn_ie_len = src->rsn_ie_len;
2323
2324         dst->last_scanned = jiffies;
2325         /* qos related parameters */
2326         //qos_active = src->qos_data.active;
2327         qos_active = dst->qos_data.active;
2328         //old_param = dst->qos_data.old_param_count;
2329         old_param = dst->qos_data.param_count;
2330         if(dst->flags & NETWORK_HAS_QOS_MASK)
2331                 memcpy(&dst->qos_data, &src->qos_data,
2332                         sizeof(struct ieee80211_qos_data));
2333         else {
2334                 dst->qos_data.supported = src->qos_data.supported;
2335                 dst->qos_data.param_count = src->qos_data.param_count;
2336         }
2337
2338         if (dst->qos_data.supported == 1) {
2339                 dst->QoS_Enable = 1;
2340                 if(dst->ssid_len)
2341                         IEEE80211_DEBUG_QOS
2342                                 ("QoS the network %s is QoS supported\n",
2343                                 dst->ssid);
2344                 else
2345                         IEEE80211_DEBUG_QOS
2346                                 ("QoS the network is QoS supported\n");
2347         }
2348         dst->qos_data.active = qos_active;
2349         dst->qos_data.old_param_count = old_param;
2350
2351         /* dst->last_associate is not overwritten */
2352         dst->wmm_info = src->wmm_info; //sure to exist in beacon or probe response frame.
2353         if (src->wmm_param[0].aci_aifsn|| \
2354            src->wmm_param[1].aci_aifsn|| \
2355            src->wmm_param[2].aci_aifsn|| \
2356            src->wmm_param[3].aci_aifsn) {
2357           memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN);
2358         }
2359         //dst->QoS_Enable = src->QoS_Enable;
2360 #ifdef THOMAS_TURBO
2361         dst->Turbo_Enable = src->Turbo_Enable;
2362 #endif
2363
2364         dst->CountryIeLen = src->CountryIeLen;
2365         memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen);
2366
2367         //added by amy for LEAP
2368         dst->bWithAironetIE = src->bWithAironetIE;
2369         dst->bCkipSupported = src->bCkipSupported;
2370         memcpy(dst->CcxRmState, src->CcxRmState, 2);
2371         dst->bCcxRmEnable = src->bCcxRmEnable;
2372         dst->MBssidMask = src->MBssidMask;
2373         dst->bMBssidValid = src->bMBssidValid;
2374         memcpy(dst->MBssid, src->MBssid, 6);
2375         dst->bWithCcxVerNum = src->bWithCcxVerNum;
2376         dst->BssCcxVerNumber = src->BssCcxVerNumber;
2377
2378 }
2379
2380 static inline int is_beacon(__le16 fc)
2381 {
2382         return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON);
2383 }
2384
2385 static inline void ieee80211_process_probe_response(
2386         struct ieee80211_device *ieee,
2387         struct ieee80211_probe_response *beacon,
2388         struct ieee80211_rx_stats *stats)
2389 {
2390         struct ieee80211_network *network;
2391         struct ieee80211_network *target;
2392         struct ieee80211_network *oldest = NULL;
2393 #ifdef CONFIG_IEEE80211_DEBUG
2394         struct ieee80211_info_element *info_element = &beacon->info_element[0];
2395 #endif
2396         int fc = WLAN_FC_GET_STYPE(le16_to_cpu(beacon->header.frame_ctl));
2397         unsigned long flags;
2398         short renew;
2399         u16 capability;
2400         //u8 wmm_info;
2401
2402         network = kzalloc(sizeof(*network), GFP_ATOMIC);
2403         if (!network)
2404                 goto out;
2405
2406         capability = le16_to_cpu(beacon->capability);
2407         IEEE80211_DEBUG_SCAN(
2408                 "'%s' (%pM): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
2409                 escape_essid(info_element->data, info_element->len),
2410                 beacon->header.addr3,
2411                 (capability & (1 << 0xf)) ? '1' : '0',
2412                 (capability & (1 << 0xe)) ? '1' : '0',
2413                 (capability & (1 << 0xd)) ? '1' : '0',
2414                 (capability & (1 << 0xc)) ? '1' : '0',
2415                 (capability & (1 << 0xb)) ? '1' : '0',
2416                 (capability & (1 << 0xa)) ? '1' : '0',
2417                 (capability & (1 << 0x9)) ? '1' : '0',
2418                 (capability & (1 << 0x8)) ? '1' : '0',
2419                 (capability & (1 << 0x7)) ? '1' : '0',
2420                 (capability & (1 << 0x6)) ? '1' : '0',
2421                 (capability & (1 << 0x5)) ? '1' : '0',
2422                 (capability & (1 << 0x4)) ? '1' : '0',
2423                 (capability & (1 << 0x3)) ? '1' : '0',
2424                 (capability & (1 << 0x2)) ? '1' : '0',
2425                 (capability & (1 << 0x1)) ? '1' : '0',
2426                 (capability & (1 << 0x0)) ? '1' : '0');
2427
2428         if (ieee80211_network_init(ieee, beacon, network, stats)) {
2429                 IEEE80211_DEBUG_SCAN("Dropped '%s' (%pM) via %s.\n",
2430                                      escape_essid(info_element->data,
2431                                                   info_element->len),
2432                                      beacon->header.addr3,
2433                                      fc == IEEE80211_STYPE_PROBE_RESP ?
2434                                      "PROBE RESPONSE" : "BEACON");
2435                 goto out;
2436         }
2437
2438         // For Asus EeePc request,
2439         // (1) if wireless adapter receive get any 802.11d country code in AP beacon,
2440         //         wireless adapter should follow the country code.
2441         // (2)  If there is no any country code in beacon,
2442         //       then wireless adapter should do active scan from ch1~11 and
2443         //       passive scan from ch12~14
2444
2445         if (!IsLegalChannel(ieee, network->channel))
2446                 goto out;
2447         if (ieee->bGlobalDomain)
2448         {
2449                 if (fc == IEEE80211_STYPE_PROBE_RESP)
2450                 {
2451                         // Case 1: Country code
2452                         if(IS_COUNTRY_IE_VALID(ieee) )
2453                         {
2454                                 if (!IsLegalChannel(ieee, network->channel)) {
2455                                         printk("GetScanInfo(): For Country code, filter probe response at channel(%d).\n", network->channel);
2456                                         goto out;
2457                                 }
2458                         }
2459                         // Case 2: No any country code.
2460                         else
2461                         {
2462                                 // Filter over channel ch12~14
2463                                 if (network->channel > 11)
2464                                 {
2465                                         printk("GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n", network->channel);
2466                                         goto out;
2467                                 }
2468                         }
2469                 }
2470                 else
2471                 {
2472                         // Case 1: Country code
2473                         if(IS_COUNTRY_IE_VALID(ieee) )
2474                         {
2475                                 if (!IsLegalChannel(ieee, network->channel)) {
2476                                         printk("GetScanInfo(): For Country code, filter beacon at channel(%d).\n",network->channel);
2477                                         goto out;
2478                                 }
2479                         }
2480                         // Case 2: No any country code.
2481                         else
2482                         {
2483                                 // Filter over channel ch12~14
2484                                 if (network->channel > 14)
2485                                 {
2486                                         printk("GetScanInfo(): For Global Domain, filter beacon at channel(%d).\n",network->channel);
2487                                         goto out;
2488                                 }
2489                         }
2490                 }
2491         }
2492
2493         /* The network parsed correctly -- so now we scan our known networks
2494          * to see if we can find it in our list.
2495          *
2496          * NOTE:  This search is definitely not optimized.  Once its doing
2497          *        the "right thing" we'll optimize it for efficiency if
2498          *        necessary */
2499
2500         /* Search for this entry in the list and update it if it is
2501          * already there. */
2502
2503         spin_lock_irqsave(&ieee->lock, flags);
2504
2505         if (is_same_network(&ieee->current_network, network, ieee)) {
2506                 update_network(&ieee->current_network, network);
2507                 if ((ieee->current_network.mode == IEEE_N_24G || ieee->current_network.mode == IEEE_G)
2508                 && ieee->current_network.berp_info_valid){
2509                 if(ieee->current_network.erp_value& ERP_UseProtection)
2510                         ieee->current_network.buseprotection = true;
2511                 else
2512                         ieee->current_network.buseprotection = false;
2513                 }
2514                 if(is_beacon(beacon->header.frame_ctl))
2515                 {
2516                         if(ieee->state == IEEE80211_LINKED)
2517                                 ieee->LinkDetectInfo.NumRecvBcnInPeriod++;
2518                 }
2519                 else //hidden AP
2520                         network->flags = (~NETWORK_EMPTY_ESSID & network->flags)|(NETWORK_EMPTY_ESSID & ieee->current_network.flags);
2521         }
2522
2523         list_for_each_entry(target, &ieee->network_list, list) {
2524                 if (is_same_network(target, network, ieee))
2525                         break;
2526                 if ((oldest == NULL) ||
2527                     (target->last_scanned < oldest->last_scanned))
2528                         oldest = target;
2529         }
2530
2531         /* If we didn't find a match, then get a new network slot to initialize
2532          * with this beacon's information */
2533         if (&target->list == &ieee->network_list) {
2534                 if (list_empty(&ieee->network_free_list)) {
2535                         /* If there are no more slots, expire the oldest */
2536                         list_del(&oldest->list);
2537                         target = oldest;
2538                         IEEE80211_DEBUG_SCAN("Expired '%s' (%pM) from "
2539                                              "network list.\n",
2540                                              escape_essid(target->ssid,
2541                                                           target->ssid_len),
2542                                              target->bssid);
2543                 } else {
2544                         /* Otherwise just pull from the free list */
2545                         target = list_entry(ieee->network_free_list.next,
2546                                             struct ieee80211_network, list);
2547                         list_del(ieee->network_free_list.next);
2548                 }
2549
2550
2551 #ifdef CONFIG_IEEE80211_DEBUG
2552                 IEEE80211_DEBUG_SCAN("Adding '%s' (%pM) via %s.\n",
2553                                      escape_essid(network->ssid,
2554                                                   network->ssid_len),
2555                                      network->bssid,
2556                                      fc == IEEE80211_STYPE_PROBE_RESP ?
2557                                      "PROBE RESPONSE" : "BEACON");
2558 #endif
2559                 memcpy(target, network, sizeof(*target));
2560                 list_add_tail(&target->list, &ieee->network_list);
2561                 if(ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)
2562                         ieee80211_softmac_new_net(ieee,network);
2563         } else {
2564                 IEEE80211_DEBUG_SCAN("Updating '%s' (%pM) via %s.\n",
2565                                      escape_essid(target->ssid,
2566                                                   target->ssid_len),
2567                                      target->bssid,
2568                                      fc == IEEE80211_STYPE_PROBE_RESP ?
2569                                      "PROBE RESPONSE" : "BEACON");
2570
2571                 /* we have an entry and we are going to update it. But this entry may
2572                  * be already expired. In this case we do the same as we found a new
2573                  * net and call the new_net handler
2574                  */
2575                 renew = !time_after(target->last_scanned + ieee->scan_age, jiffies);
2576                 //YJ,add,080819,for hidden ap
2577                 if(is_beacon(beacon->header.frame_ctl) == 0)
2578                         network->flags = (~NETWORK_EMPTY_ESSID & network->flags)|(NETWORK_EMPTY_ESSID & target->flags);
2579                 //if(strncmp(network->ssid, "linksys-c",9) == 0)
2580                 //      printk("====>2 network->ssid=%s FLAG=%d target.ssid=%s FLAG=%d\n", network->ssid, network->flags, target->ssid, target->flags);
2581                 if(((network->flags & NETWORK_EMPTY_ESSID) == NETWORK_EMPTY_ESSID) \
2582                     && (((network->ssid_len > 0) && (strncmp(target->ssid, network->ssid, network->ssid_len)))\
2583                     ||((ieee->current_network.ssid_len == network->ssid_len)&&(strncmp(ieee->current_network.ssid, network->ssid, network->ssid_len) == 0)&&(ieee->state == IEEE80211_NOLINK))))
2584                         renew = 1;
2585                 //YJ,add,080819,for hidden ap,end
2586
2587                 update_network(target, network);
2588                 if(renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE))
2589                         ieee80211_softmac_new_net(ieee,network);
2590         }
2591
2592         spin_unlock_irqrestore(&ieee->lock, flags);
2593         if (is_beacon(beacon->header.frame_ctl)&&is_same_network(&ieee->current_network, network, ieee)&&\
2594                 (ieee->state == IEEE80211_LINKED)) {
2595                 if (ieee->handle_beacon != NULL) {
2596                         ieee->handle_beacon(ieee->dev,beacon,&ieee->current_network);
2597                 }
2598         }
2599
2600 out:
2601         kfree(network);
2602 }
2603
2604 void ieee80211_rx_mgt(struct ieee80211_device *ieee,
2605                       struct rtl_80211_hdr_4addr *header,
2606                       struct ieee80211_rx_stats *stats)
2607 {
2608         switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
2609
2610         case IEEE80211_STYPE_BEACON:
2611                 IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
2612                         WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
2613                 IEEE80211_DEBUG_SCAN("Beacon\n");
2614                 ieee80211_process_probe_response(
2615                         ieee, (struct ieee80211_probe_response *)header, stats);
2616                 break;
2617
2618         case IEEE80211_STYPE_PROBE_RESP:
2619                 IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
2620                         WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
2621                 IEEE80211_DEBUG_SCAN("Probe response\n");
2622                 ieee80211_process_probe_response(
2623                         ieee, (struct ieee80211_probe_response *)header, stats);
2624                 break;
2625
2626         }
2627 }
2628 EXPORT_SYMBOL(ieee80211_rx_mgt);