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(struct rx_ts_record *pTS, PRX_REORDER_ENTRY pReorderEntry)
 512 {
 513         struct list_head *pList = &pTS->rx_pending_pkt_list;
 514         while(pList->next != &pTS->rx_pending_pkt_list)
 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                                     struct rx_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->rx_indicate_seq + WinSize - 1) % 4096;
 596         u8                      index = 0;
 597         bool                    bMatchWinStart = false, bPktInBuf = false;
 598         IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): Seq is %d,pTS->rx_indicate_seq is %d, WinSize is %d\n",__func__,SeqNum,pTS->rx_indicate_seq,WinSize);
 599
 600         prxbIndicateArray = kmalloc_array(REORDER_WIN_SIZE,
 601                                           sizeof(struct ieee80211_rxb *),
 602                                           GFP_ATOMIC);
 603         if (!prxbIndicateArray)
 604                 return;
 605
 606         /* Rx Reorder initialize condition.*/
 607         if (pTS->rx_indicate_seq == 0xffff) {
 608                 pTS->rx_indicate_seq = SeqNum;
 609         }
 610
 611         /* Drop out the packet which SeqNum is smaller than WinStart */
 612         if (SN_LESS(SeqNum, pTS->rx_indicate_seq)) {
 613                 IEEE80211_DEBUG(IEEE80211_DL_REORDER,"Packet Drop! IndicateSeq: %d, NewSeq: %d\n",
 614                                  pTS->rx_indicate_seq, SeqNum);
 615                 pHTInfo->RxReorderDropCounter++;
 616                 {
 617                         int i;
 618                         for(i =0; i < prxb->nr_subframes; i++) {
 619                                 dev_kfree_skb(prxb->subframes[i]);
 620                         }
 621                         kfree(prxb);
 622                         prxb = NULL;
 623                 }
 624
 625                 kfree(prxbIndicateArray);
 626                 return;
 627         }
 628
 629         /*
 630          * Sliding window manipulation. Conditions includes:
 631          * 1. Incoming SeqNum is equal to WinStart =>Window shift 1
 632          * 2. Incoming SeqNum is larger than the WinEnd => Window shift N
 633          */
 634         if(SN_EQUAL(SeqNum, pTS->rx_indicate_seq)) {
 635                 pTS->rx_indicate_seq = (pTS->rx_indicate_seq + 1) % 4096;
 636                 bMatchWinStart = true;
 637         } else if(SN_LESS(WinEnd, SeqNum)) {
 638                 if(SeqNum >= (WinSize - 1)) {
 639                         pTS->rx_indicate_seq = SeqNum + 1 -WinSize;
 640                 } else {
 641                         pTS->rx_indicate_seq = 4095 - (WinSize - (SeqNum + 1)) + 1;
 642                 }
 643                 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "Window Shift! IndicateSeq: %d, NewSeq: %d\n",pTS->rx_indicate_seq, SeqNum);
 644         }
 645
 646         /*
 647          * Indication process.
 648          * After Packet dropping and Sliding Window shifting as above, we can now just indicate the packets
 649          * with the SeqNum smaller than latest WinStart and buffer other packets.
 650          */
 651         /* For Rx Reorder condition:
 652          * 1. All packets with SeqNum smaller than WinStart => Indicate
 653          * 2. All packets with SeqNum larger than or equal to WinStart => Buffer it.
 654          */
 655         if(bMatchWinStart) {
 656                 /* Current packet is going to be indicated.*/
 657                 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "Packets indication!! IndicateSeq: %d, NewSeq: %d\n",\
 658                                 pTS->rx_indicate_seq, SeqNum);
 659                 prxbIndicateArray[0] = prxb;
 660 //              printk("========================>%s(): SeqNum is %d\n",__func__,SeqNum);
 661                 index = 1;
 662         } else {
 663                 /* Current packet is going to be inserted into pending list.*/
 664                 //IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): We RX no ordered packed, insert to ordered list\n",__func__);
 665                 if(!list_empty(&ieee->RxReorder_Unused_List)) {
 666                         pReorderEntry = (PRX_REORDER_ENTRY)list_entry(ieee->RxReorder_Unused_List.next,RX_REORDER_ENTRY,List);
 667                         list_del_init(&pReorderEntry->List);
 668
 669                         /* Make a reorder entry and insert into a the packet list.*/
 670                         pReorderEntry->SeqNum = SeqNum;
 671                         pReorderEntry->prxb = prxb;
 672         //              IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): pREorderEntry->SeqNum is %d\n",__func__,pReorderEntry->SeqNum);
 673
 674                         if(!AddReorderEntry(pTS, pReorderEntry)) {
 675                                 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "%s(): Duplicate packet is dropped!! IndicateSeq: %d, NewSeq: %d\n",
 676                                         __func__, pTS->rx_indicate_seq, SeqNum);
 677                                 list_add_tail(&pReorderEntry->List,&ieee->RxReorder_Unused_List);
 678                                 {
 679                                         int i;
 680                                         for(i =0; i < prxb->nr_subframes; i++) {
 681                                                 dev_kfree_skb(prxb->subframes[i]);
 682                                         }
 683                                         kfree(prxb);
 684                                         prxb = NULL;
 685                                 }
 686                         } else {
 687                                 IEEE80211_DEBUG(IEEE80211_DL_REORDER,
 688                                          "Pkt insert into buffer!! IndicateSeq: %d, NewSeq: %d\n",pTS->rx_indicate_seq, SeqNum);
 689                         }
 690                 }
 691                 else {
 692                         /*
 693                          * Packets are dropped if there is not enough reorder entries.
 694                          * This part shall be modified!! We can just indicate all the
 695                          * packets in buffer and get reorder entries.
 696                          */
 697                         IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): There is no reorder entry!! Packet is dropped!!\n");
 698                         {
 699                                 int i;
 700                                 for(i =0; i < prxb->nr_subframes; i++) {
 701                                         dev_kfree_skb(prxb->subframes[i]);
 702                                 }
 703                                 kfree(prxb);
 704                                 prxb = NULL;
 705                         }
 706                 }
 707         }
 708
 709         /* Check if there is any packet need indicate.*/
 710         while(!list_empty(&pTS->rx_pending_pkt_list)) {
 711                 IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): start RREORDER indicate\n",__func__);
 712                 pReorderEntry = (PRX_REORDER_ENTRY)list_entry(pTS->rx_pending_pkt_list.prev,RX_REORDER_ENTRY,List);
 713                 if (SN_LESS(pReorderEntry->SeqNum, pTS->rx_indicate_seq) ||
 714                     SN_EQUAL(pReorderEntry->SeqNum, pTS->rx_indicate_seq))
 715                 {
 716                         /* This protect buffer from overflow. */
 717                         if (index >= REORDER_WIN_SIZE) {
 718                                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): Buffer overflow!! \n");
 719                                 bPktInBuf = true;
 720                                 break;
 721                         }
 722
 723                         list_del_init(&pReorderEntry->List);
 724
 725                         if(SN_EQUAL(pReorderEntry->SeqNum, pTS->rx_indicate_seq))
 726                                 pTS->rx_indicate_seq = (pTS->rx_indicate_seq + 1) % 4096;
 727
 728                         IEEE80211_DEBUG(IEEE80211_DL_REORDER,"Packets indication!! IndicateSeq: %d, NewSeq: %d\n",pTS->rx_indicate_seq, SeqNum);
 729                         prxbIndicateArray[index] = pReorderEntry->prxb;
 730                 //      printk("========================>%s(): pReorderEntry->SeqNum is %d\n",__func__,pReorderEntry->SeqNum);
 731                         index++;
 732
 733                         list_add_tail(&pReorderEntry->List,&ieee->RxReorder_Unused_List);
 734                 } else {
 735                         bPktInBuf = true;
 736                         break;
 737                 }
 738         }
 739
 740         /* Handling pending timer. Set this timer to prevent from long time Rx buffering.*/
 741         if (index>0) {
 742                 // Cancel previous pending timer.
 743         //      del_timer_sync(&pTS->rx_pkt_pending_timer);
 744                 pTS->rx_timeout_indicate_seq = 0xffff;
 745
 746                 // Indicate packets
 747                 if(index>REORDER_WIN_SIZE){
 748                         IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): Rx Reorder buffer full!! \n");
 749                         kfree(prxbIndicateArray);
 750                         return;
 751                 }
 752                 ieee80211_indicate_packets(ieee, prxbIndicateArray, index);
 753         }
 754
 755         if (bPktInBuf && pTS->rx_timeout_indicate_seq == 0xffff) {
 756                 // Set new pending timer.
 757                 IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): SET rx timeout timer\n", __func__);
 758                 pTS->rx_timeout_indicate_seq = pTS->rx_indicate_seq;
 759                 if(timer_pending(&pTS->rx_pkt_pending_timer))
 760                         del_timer_sync(&pTS->rx_pkt_pending_timer);
 761                 pTS->rx_pkt_pending_timer.expires = jiffies +
 762                                 msecs_to_jiffies(pHTInfo->RxReorderPendingTime);
 763                 add_timer(&pTS->rx_pkt_pending_timer);
 764         }
 765
 766         kfree(prxbIndicateArray);
 767 }
 768
 769 static u8 parse_subframe(struct sk_buff *skb,
 770                          struct ieee80211_rx_stats *rx_stats,
 771                          struct ieee80211_rxb *rxb, u8 *src, u8 *dst)
 772 {
 773         struct rtl_80211_hdr_3addr  *hdr = (struct rtl_80211_hdr_3addr *)skb->data;
 774         u16             fc = le16_to_cpu(hdr->frame_ctl);
 775
 776         u16             LLCOffset= sizeof(struct rtl_80211_hdr_3addr);
 777         u16             ChkLength;
 778         bool            bIsAggregateFrame = false;
 779         u16             nSubframe_Length;
 780         u8              nPadding_Length = 0;
 781         u16             SeqNum=0;
 782
 783         struct sk_buff *sub_skb;
 784         /* just for debug purpose */
 785         SeqNum = WLAN_GET_SEQ_SEQ(le16_to_cpu(hdr->seq_ctl));
 786
 787         if ((IEEE80211_QOS_HAS_SEQ(fc))&&\
 788                         (((frameqos *)(skb->data + IEEE80211_3ADDR_LEN))->field.reserved)) {
 789                 bIsAggregateFrame = true;
 790         }
 791
 792         if (IEEE80211_QOS_HAS_SEQ(fc)) {
 793                 LLCOffset += 2;
 794         }
 795
 796         if (rx_stats->bContainHTC) {
 797                 LLCOffset += sHTCLng;
 798         }
 799         // Null packet, don't indicate it to upper layer
 800         ChkLength = LLCOffset;/* + (Frame_WEP(frame)!=0 ?Adapter->MgntInfo.SecurityInfo.EncryptionHeadOverhead:0);*/
 801
 802         if (skb->len <= ChkLength)
 803                 return 0;
 804
 805         skb_pull(skb, LLCOffset);
 806
 807         if(!bIsAggregateFrame) {
 808                 rxb->nr_subframes = 1;
 809 #ifdef JOHN_NOCPY
 810                 rxb->subframes[0] = skb;
 811 #else
 812                 rxb->subframes[0] = skb_copy(skb, GFP_ATOMIC);
 813 #endif
 814
 815                 memcpy(rxb->src,src,ETH_ALEN);
 816                 memcpy(rxb->dst,dst,ETH_ALEN);
 817                 //IEEE80211_DEBUG_DATA(IEEE80211_DL_RX,skb->data,skb->len);
 818                 return 1;
 819         } else {
 820                 rxb->nr_subframes = 0;
 821                 memcpy(rxb->src,src,ETH_ALEN);
 822                 memcpy(rxb->dst,dst,ETH_ALEN);
 823                 while(skb->len > ETHERNET_HEADER_SIZE) {
 824                         /* Offset 12 denote 2 mac address */
 825                         nSubframe_Length = *((u16 *)(skb->data + 12));
 826                         //==m==>change the length order
 827                         nSubframe_Length = (nSubframe_Length>>8) + (nSubframe_Length<<8);
 828
 829                         if (skb->len<(ETHERNET_HEADER_SIZE + nSubframe_Length)) {
 830                                 printk("%s: A-MSDU parse error!! pRfd->nTotalSubframe : %d\n",\
 831                                                 __func__, rxb->nr_subframes);
 832                                 printk("%s: A-MSDU parse error!! Subframe Length: %d\n",__func__, nSubframe_Length);
 833                                 printk("nRemain_Length is %d and nSubframe_Length is : %d\n",skb->len,nSubframe_Length);
 834                                 printk("The Packet SeqNum is %d\n",SeqNum);
 835                                 return 0;
 836                         }
 837
 838                         /* move the data point to data content */
 839                         skb_pull(skb, ETHERNET_HEADER_SIZE);
 840
 841 #ifdef JOHN_NOCPY
 842                         sub_skb = skb_clone(skb, GFP_ATOMIC);
 843                         sub_skb->len = nSubframe_Length;
 844                         sub_skb->tail = sub_skb->data + nSubframe_Length;
 845 #else
 846                         /* Allocate new skb for releasing to upper layer */
 847                         sub_skb = dev_alloc_skb(nSubframe_Length + 12);
 848                         if (!sub_skb)
 849                                 return 0;
 850                         skb_reserve(sub_skb, 12);
 851                         skb_put_data(sub_skb, skb->data, nSubframe_Length);
 852 #endif
 853                         rxb->subframes[rxb->nr_subframes++] = sub_skb;
 854                         if (rxb->nr_subframes >= MAX_SUBFRAME_COUNT) {
 855                                 IEEE80211_DEBUG_RX("ParseSubframe(): Too many Subframes! Packets dropped!\n");
 856                                 break;
 857                         }
 858                         skb_pull(skb, nSubframe_Length);
 859
 860                         if (skb->len != 0) {
 861                                 nPadding_Length = 4 - ((nSubframe_Length + ETHERNET_HEADER_SIZE) % 4);
 862                                 if (nPadding_Length == 4) {
 863                                         nPadding_Length = 0;
 864                                 }
 865
 866                                 if (skb->len < nPadding_Length) {
 867                                         return 0;
 868                                 }
 869
 870                                 skb_pull(skb, nPadding_Length);
 871                         }
 872                 }
 873 #ifdef JOHN_NOCPY
 874                 dev_kfree_skb(skb);
 875 #endif
 876                 //{just for debug added by david
 877                 //printk("AMSDU::rxb->nr_subframes = %d\n",rxb->nr_subframes);
 878                 //}
 879                 return rxb->nr_subframes;
 880         }
 881 }
 882
 883 /* All received frames are sent to this function. @skb contains the frame in
 884  * IEEE 802.11 format, i.e., in the format it was sent over air.
 885  * This function is called only as a tasklet (software IRQ). */
 886 int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
 887                  struct ieee80211_rx_stats *rx_stats)
 888 {
 889         struct net_device *dev = ieee->dev;
 890         struct rtl_80211_hdr_4addr *hdr;
 891         //struct rtl_80211_hdr_3addrqos *hdr;
 892
 893         size_t hdrlen;
 894         u16 fc, type, stype, sc;
 895         struct net_device_stats *stats;
 896         unsigned int frag;
 897         u16 ethertype;
 898         //added by amy for reorder
 899         u8      TID = 0;
 900         u16     SeqNum = 0;
 901         struct rx_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                 ieee80211_monitor_rx(ieee, skb, rx_stats);
 965                 stats->rx_packets++;
 966                 stats->rx_bytes += skb->len;
 967                 return 1;
 968         }
 969
 970         if (ieee->host_decrypt) {
 971                 int idx = 0;
 972                 if (skb->len >= hdrlen + 3)
 973                         idx = skb->data[hdrlen + 3] >> 6;
 974                 crypt = ieee->crypt[idx];
 975 #ifdef NOT_YET
 976                 sta = NULL;
 977
 978                 /* Use station specific key to override default keys if the
 979                  * receiver address is a unicast address ("individual RA"). If
 980                  * bcrx_sta_key parameter is set, station specific key is used
 981                  * even with broad/multicast targets (this is against IEEE
 982                  * 802.11, but makes it easier to use different keys with
 983                  * stations that do not support WEP key mapping). */
 984
 985                 if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key)
 986                         (void) hostap_handle_sta_crypto(local, hdr, &crypt,
 987                                                         &sta);
 988 #endif
 989
 990                 /* allow NULL decrypt to indicate an station specific override
 991                  * for default encryption */
 992                 if (crypt && (crypt->ops == NULL ||
 993                               crypt->ops->decrypt_mpdu == NULL))
 994                         crypt = NULL;
 995
 996                 if (!crypt && (fc & IEEE80211_FCTL_WEP)) {
 997                         /* This seems to be triggered by some (multicast?)
 998                          * frames from other than current BSS, so just drop the
 999                          * frames silently instead of filling system log with
1000                          * these reports. */
1001                         IEEE80211_DEBUG_DROP("Decryption failed (not set)"
1002                                              " (SA=%pM)\n",
1003                                              hdr->addr2);
1004                         ieee->ieee_stats.rx_discards_undecryptable++;
1005                         goto rx_dropped;
1006                 }
1007         }
1008
1009         if (skb->len < IEEE80211_DATA_HDR3_LEN)
1010                 goto rx_dropped;
1011
1012         // if QoS enabled, should check the sequence for each of the AC
1013         if ((!ieee->pHTInfo->bCurRxReorderEnable) || !ieee->current_network.qos_data.active|| !IsDataFrame(skb->data) || IsLegacyDataFrame(skb->data)) {
1014                 if (is_duplicate_packet(ieee, hdr))
1015                 goto rx_dropped;
1016
1017         }
1018         else
1019         {
1020                 struct rx_ts_record *pRxTS = NULL;
1021                         //IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): QOS ENABLE AND RECEIVE QOS DATA , we will get Ts, tid:%d\n",__func__, tid);
1022                 if(GetTs(
1023                                 ieee,
1024                                 (struct ts_common_info **) &pRxTS,
1025                                 hdr->addr2,
1026                                 Frame_QoSTID((u8 *)(skb->data)),
1027                                 RX_DIR,
1028                                 true))
1029                 {
1030
1031                 //      IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): pRxTS->rx_last_frag_num is %d,frag is %d,pRxTS->rx_last_seq_num is %d,seq is %d\n",__func__,pRxTS->rx_last_frag_num,frag,pRxTS->rx_last_seq_num,WLAN_GET_SEQ_SEQ(sc));
1032                         if ((fc & (1<<11)) &&
1033                             (frag == pRxTS->rx_last_frag_num) &&
1034                             (WLAN_GET_SEQ_SEQ(sc) == pRxTS->rx_last_seq_num)) {
1035                                 goto rx_dropped;
1036                         }
1037                         else
1038                         {
1039                                 pRxTS->rx_last_frag_num = frag;
1040                                 pRxTS->rx_last_seq_num = WLAN_GET_SEQ_SEQ(sc);
1041                         }
1042                 }
1043                 else
1044                 {
1045                         IEEE80211_DEBUG(IEEE80211_DL_ERR, "%s(): No TS!! Skip the check!!\n",__func__);
1046                         goto rx_dropped;
1047                 }
1048         }
1049         if (type == IEEE80211_FTYPE_MGMT) {
1050
1051
1052         //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
1053                 if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
1054                         goto rx_dropped;
1055                 else
1056                         goto rx_exit;
1057         }
1058
1059         /* Data frame - extract src/dst addresses */
1060         switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
1061         case IEEE80211_FCTL_FROMDS:
1062                 memcpy(dst, hdr->addr1, ETH_ALEN);
1063                 memcpy(src, hdr->addr3, ETH_ALEN);
1064                 memcpy(bssid, hdr->addr2, ETH_ALEN);
1065                 break;
1066         case IEEE80211_FCTL_TODS:
1067                 memcpy(dst, hdr->addr3, ETH_ALEN);
1068                 memcpy(src, hdr->addr2, ETH_ALEN);
1069                 memcpy(bssid, hdr->addr1, ETH_ALEN);
1070                 break;
1071         case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
1072                 if (skb->len < IEEE80211_DATA_HDR4_LEN)
1073                         goto rx_dropped;
1074                 memcpy(dst, hdr->addr3, ETH_ALEN);
1075                 memcpy(src, hdr->addr4, ETH_ALEN);
1076                 memcpy(bssid, ieee->current_network.bssid, ETH_ALEN);
1077                 break;
1078         default:
1079                 memcpy(dst, hdr->addr1, ETH_ALEN);
1080                 memcpy(src, hdr->addr2, ETH_ALEN);
1081                 memcpy(bssid, hdr->addr3, ETH_ALEN);
1082                 break;
1083         }
1084
1085 #ifdef NOT_YET
1086         if (hostap_rx_frame_wds(ieee, hdr, fc, &wds))
1087                 goto rx_dropped;
1088         if (wds) {
1089                 skb->dev = dev = wds;
1090                 stats = hostap_get_stats(dev);
1091         }
1092
1093         if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
1094             (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS &&
1095             ieee->stadev &&
1096             memcmp(hdr->addr2, ieee->assoc_ap_addr, ETH_ALEN) == 0) {
1097                 /* Frame from BSSID of the AP for which we are a client */
1098                 skb->dev = dev = ieee->stadev;
1099                 stats = hostap_get_stats(dev);
1100                 from_assoc_ap = 1;
1101         }
1102
1103         if ((ieee->iw_mode == IW_MODE_MASTER ||
1104              ieee->iw_mode == IW_MODE_REPEAT) &&
1105             !from_assoc_ap) {
1106                 switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats,
1107                                              wds != NULL)) {
1108                 case AP_RX_CONTINUE_NOT_AUTHORIZED:
1109                 case AP_RX_CONTINUE:
1110                         break;
1111                 case AP_RX_DROP:
1112                         goto rx_dropped;
1113                 case AP_RX_EXIT:
1114                         goto rx_exit;
1115                 }
1116         }
1117 #endif
1118         //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
1119         /* Nullfunc frames may have PS-bit set, so they must be passed to
1120          * hostap_handle_sta_rx() before being dropped here. */
1121         if (stype != IEEE80211_STYPE_DATA &&
1122             stype != IEEE80211_STYPE_DATA_CFACK &&
1123             stype != IEEE80211_STYPE_DATA_CFPOLL &&
1124             stype != IEEE80211_STYPE_DATA_CFACKPOLL&&
1125             stype != IEEE80211_STYPE_QOS_DATA//add by David,2006.8.4
1126             ) {
1127                 if (stype != IEEE80211_STYPE_NULLFUNC)
1128                         IEEE80211_DEBUG_DROP(
1129                                 "RX: dropped data frame "
1130                                 "with no data (type=0x%02x, "
1131                                 "subtype=0x%02x, len=%d)\n",
1132                                 type, stype, skb->len);
1133                 goto rx_dropped;
1134         }
1135         if (memcmp(bssid, ieee->current_network.bssid, ETH_ALEN))
1136                 goto rx_dropped;
1137
1138         /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
1139
1140         if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
1141             (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0)
1142         {
1143                 printk("decrypt frame error\n");
1144                 goto rx_dropped;
1145         }
1146
1147
1148         hdr = (struct rtl_80211_hdr_4addr *) skb->data;
1149
1150         /* skb: hdr + (possibly fragmented) plaintext payload */
1151         // PR: FIXME: hostap has additional conditions in the "if" below:
1152         // ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
1153         if ((frag != 0 || (fc & IEEE80211_FCTL_MOREFRAGS))) {
1154                 int flen;
1155                 struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr);
1156                 IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
1157
1158                 if (!frag_skb) {
1159                         IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG,
1160                                         "Rx cannot get skb from fragment "
1161                                         "cache (morefrag=%d seq=%u frag=%u)\n",
1162                                         (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
1163                                         WLAN_GET_SEQ_SEQ(sc), frag);
1164                         goto rx_dropped;
1165                 }
1166                 flen = skb->len;
1167                 if (frag != 0)
1168                         flen -= hdrlen;
1169
1170                 if (frag_skb->tail + flen > frag_skb->end) {
1171                         printk(KERN_WARNING "%s: host decrypted and "
1172                                "reassembled frame did not fit skb\n",
1173                                dev->name);
1174                         ieee80211_frag_cache_invalidate(ieee, hdr);
1175                         goto rx_dropped;
1176                 }
1177
1178                 if (frag == 0) {
1179                         /* copy first fragment (including full headers) into
1180                          * beginning of the fragment cache skb */
1181                         skb_put_data(frag_skb, skb->data, flen);
1182                 } else {
1183                         /* append frame payload to the end of the fragment
1184                          * cache skb */
1185                         skb_put_data(frag_skb, skb->data + hdrlen, flen);
1186                 }
1187                 dev_kfree_skb_any(skb);
1188                 skb = NULL;
1189
1190                 if (fc & IEEE80211_FCTL_MOREFRAGS) {
1191                         /* more fragments expected - leave the skb in fragment
1192                          * cache for now; it will be delivered to upper layers
1193                          * after all fragments have been received */
1194                         goto rx_exit;
1195                 }
1196
1197                 /* this was the last fragment and the frame will be
1198                  * delivered, so remove skb from fragment cache */
1199                 skb = frag_skb;
1200                 hdr = (struct rtl_80211_hdr_4addr *) skb->data;
1201                 ieee80211_frag_cache_invalidate(ieee, hdr);
1202         }
1203
1204         /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
1205          * encrypted/authenticated */
1206         if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
1207             ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt))
1208         {
1209                 printk("==>decrypt msdu error\n");
1210                 goto rx_dropped;
1211         }
1212
1213         //added by amy for AP roaming
1214         ieee->LinkDetectInfo.NumRecvDataInPeriod++;
1215         ieee->LinkDetectInfo.NumRxOkInPeriod++;
1216
1217         hdr = (struct rtl_80211_hdr_4addr *) skb->data;
1218         if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep) {
1219                 if (/*ieee->ieee802_1x &&*/
1220                     ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1221
1222 #ifdef CONFIG_IEEE80211_DEBUG
1223                         /* pass unencrypted EAPOL frames even if encryption is
1224                          * configured */
1225                         struct eapol *eap = (struct eapol *)(skb->data +
1226                                 24);
1227                         IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1228                                                 eap_get_type(eap->type));
1229 #endif
1230                 } else {
1231                         IEEE80211_DEBUG_DROP(
1232                                 "encryption configured, but RX "
1233                                 "frame not encrypted (SA=%pM)\n",
1234                                 hdr->addr2);
1235                         goto rx_dropped;
1236                 }
1237         }
1238
1239 #ifdef CONFIG_IEEE80211_DEBUG
1240         if (crypt && !(fc & IEEE80211_FCTL_WEP) &&
1241             ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1242                         struct eapol *eap = (struct eapol *)(skb->data +
1243                                 24);
1244                         IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1245                                                 eap_get_type(eap->type));
1246         }
1247 #endif
1248
1249         if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep &&
1250             !ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1251                 IEEE80211_DEBUG_DROP(
1252                         "dropped unencrypted RX data "
1253                         "frame from %pM"
1254                         " (drop_unencrypted=1)\n",
1255                         hdr->addr2);
1256                 goto rx_dropped;
1257         }
1258 /*
1259         if(ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1260                 printk(KERN_WARNING "RX: IEEE802.1X EPAOL frame!\n");
1261         }
1262 */
1263 //added by amy for reorder
1264         if (ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data)
1265                 && !is_multicast_ether_addr(hdr->addr1))
1266         {
1267                 TID = Frame_QoSTID(skb->data);
1268                 SeqNum = WLAN_GET_SEQ_SEQ(sc);
1269                 GetTs(ieee,(struct ts_common_info **) &pTS,hdr->addr2,TID,RX_DIR,true);
1270                 if (TID !=0 && TID !=3)
1271                 {
1272                         ieee->bis_any_nonbepkts = true;
1273                 }
1274         }
1275 //added by amy for reorder
1276         /* skb: hdr + (possible reassembled) full plaintext payload */
1277         //ethertype = (payload[6] << 8) | payload[7];
1278         rxb = kmalloc(sizeof(struct ieee80211_rxb), GFP_ATOMIC);
1279         if (!rxb)
1280                 goto rx_dropped;
1281         /* to parse amsdu packets */
1282         /* qos data packets & reserved bit is 1 */
1283         if (parse_subframe(skb, rx_stats, rxb, src, dst) == 0) {
1284                 /* only to free rxb, and not submit the packets to upper layer */
1285                 for(i =0; i < rxb->nr_subframes; i++) {
1286                         dev_kfree_skb(rxb->subframes[i]);
1287                 }
1288                 kfree(rxb);
1289                 rxb = NULL;
1290                 goto rx_dropped;
1291         }
1292
1293 //added by amy for reorder
1294         if (!ieee->pHTInfo->bCurRxReorderEnable || pTS == NULL){
1295 //added by amy for reorder
1296                 for(i = 0; i<rxb->nr_subframes; i++) {
1297                         struct sk_buff *sub_skb = rxb->subframes[i];
1298
1299                         if (sub_skb) {
1300                                 /* convert hdr + possible LLC headers into Ethernet header */
1301                                 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
1302                                 if (sub_skb->len >= 8 &&
1303                                                 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
1304                                                   ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
1305                                                  memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
1306                                         /* remove RFC1042 or Bridge-Tunnel encapsulation and
1307                                          * replace EtherType */
1308                                         skb_pull(sub_skb, SNAP_SIZE);
1309                                         memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
1310                                         memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
1311                                 } else {
1312                                         u16 len;
1313                                         /* Leave Ethernet header part of hdr and full payload */
1314                                         len = be16_to_cpu(htons(sub_skb->len));
1315                                         memcpy(skb_push(sub_skb, 2), &len, 2);
1316                                         memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
1317                                         memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
1318                                 }
1319
1320                                 stats->rx_packets++;
1321                                 stats->rx_bytes += sub_skb->len;
1322                                 if (is_multicast_ether_addr(dst)) {
1323                                         stats->multicast++;
1324                                 }
1325
1326                                 /* Indicat the packets to upper layer */
1327                                 sub_skb->protocol = eth_type_trans(sub_skb, dev);
1328                                 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
1329                                 sub_skb->dev = dev;
1330                                 sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
1331                                 //skb->ip_summed = CHECKSUM_UNNECESSARY; /* 802.11 crc not sufficient */
1332                                 ieee->last_rx_ps_time = jiffies;
1333                                 netif_rx(sub_skb);
1334                         }
1335                 }
1336                 kfree(rxb);
1337                 rxb = NULL;
1338
1339         }
1340         else
1341         {
1342                 IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): REORDER ENABLE AND PTS not NULL, and we will enter RxReorderIndicatePacket()\n",__func__);
1343                 RxReorderIndicatePacket(ieee, rxb, pTS, SeqNum);
1344         }
1345 #ifndef JOHN_NOCPY
1346         dev_kfree_skb(skb);
1347 #endif
1348
1349  rx_exit:
1350 #ifdef NOT_YET
1351         if (sta)
1352                 hostap_handle_sta_release(sta);
1353 #endif
1354         return 1;
1355
1356  rx_dropped:
1357         kfree(rxb);
1358         rxb = NULL;
1359         stats->rx_dropped++;
1360
1361         /* Returning 0 indicates to caller that we have not handled the SKB--
1362          * so it is still allocated and can be used again by underlying
1363          * hardware as a DMA target */
1364         return 0;
1365 }
1366 EXPORT_SYMBOL(ieee80211_rx);
1367
1368 #define MGMT_FRAME_FIXED_PART_LENGTH            0x24
1369
1370 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
1371
1372 /*
1373 * Make the structure we read from the beacon packet to have
1374 * the right values
1375 */
1376 static int ieee80211_verify_qos_info(struct ieee80211_qos_information_element
1377                                      *info_element, int sub_type)
1378 {
1379
1380         if (info_element->qui_subtype != sub_type)
1381                 return -1;
1382         if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
1383                 return -1;
1384         if (info_element->qui_type != QOS_OUI_TYPE)
1385                 return -1;
1386         if (info_element->version != QOS_VERSION_1)
1387                 return -1;
1388
1389         return 0;
1390 }
1391
1392
1393 /*
1394  * Parse a QoS parameter element
1395  */
1396 static int ieee80211_read_qos_param_element(struct ieee80211_qos_parameter_info
1397                                             *element_param, struct ieee80211_info_element
1398                                             *info_element)
1399 {
1400         int ret = 0;
1401         u16 size = sizeof(struct ieee80211_qos_parameter_info) - 2;
1402
1403         if ((info_element == NULL) || (element_param == NULL))
1404                 return -1;
1405
1406         if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
1407                 memcpy(element_param->info_element.qui, info_element->data,
1408                        info_element->len);
1409                 element_param->info_element.elementID = info_element->id;
1410                 element_param->info_element.length = info_element->len;
1411         } else
1412                 ret = -1;
1413         if (ret == 0)
1414                 ret = ieee80211_verify_qos_info(&element_param->info_element,
1415                                                 QOS_OUI_PARAM_SUB_TYPE);
1416         return ret;
1417 }
1418
1419 /*
1420  * Parse a QoS information element
1421  */
1422 static int ieee80211_read_qos_info_element(struct
1423                                            ieee80211_qos_information_element
1424                                            *element_info, struct ieee80211_info_element
1425                                            *info_element)
1426 {
1427         int ret = 0;
1428         u16 size = sizeof(struct ieee80211_qos_information_element) - 2;
1429
1430         if (element_info == NULL)
1431                 return -1;
1432         if (info_element == NULL)
1433                 return -1;
1434
1435         if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
1436                 memcpy(element_info->qui, info_element->data,
1437                        info_element->len);
1438                 element_info->elementID = info_element->id;
1439                 element_info->length = info_element->len;
1440         } else
1441                 ret = -1;
1442
1443         if (ret == 0)
1444                 ret = ieee80211_verify_qos_info(element_info,
1445                                                 QOS_OUI_INFO_SUB_TYPE);
1446         return ret;
1447 }
1448
1449
1450 /*
1451  * Write QoS parameters from the ac parameters.
1452  */
1453 static int ieee80211_qos_convert_ac_to_parameters(struct
1454                                                   ieee80211_qos_parameter_info
1455                                                   *param_elm, struct
1456                                                   ieee80211_qos_parameters
1457                                                   *qos_param)
1458 {
1459         int i;
1460         struct ieee80211_qos_ac_parameter *ac_params;
1461         u8 aci;
1462         //u8 cw_min;
1463         //u8 cw_max;
1464
1465         for (i = 0; i < QOS_QUEUE_NUM; i++) {
1466                 ac_params = &(param_elm->ac_params_record[i]);
1467
1468                 aci = (ac_params->aci_aifsn & 0x60) >> 5;
1469
1470                 if(aci >= QOS_QUEUE_NUM)
1471                         continue;
1472                 qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f;
1473
1474                 /* WMM spec P.11: The minimum value for AIFSN shall be 2 */
1475                 qos_param->aifs[aci] = (qos_param->aifs[aci] < 2) ? 2:qos_param->aifs[aci];
1476
1477                 qos_param->cw_min[aci] =
1478                     cpu_to_le16(ac_params->ecw_min_max & 0x0F);
1479
1480                 qos_param->cw_max[aci] =
1481                     cpu_to_le16((ac_params->ecw_min_max & 0xF0) >> 4);
1482
1483                 qos_param->flag[aci] =
1484                     (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1485                 qos_param->tx_op_limit[aci] = ac_params->tx_op_limit;
1486         }
1487         return 0;
1488 }
1489
1490 /*
1491  * we have a generic data element which it may contain QoS information or
1492  * parameters element. check the information element length to decide
1493  * which type to read
1494  */
1495 static int ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element
1496                                              *info_element,
1497                                              struct ieee80211_network *network)
1498 {
1499         int rc = 0;
1500         struct ieee80211_qos_parameters *qos_param = NULL;
1501         struct ieee80211_qos_information_element qos_info_element;
1502
1503         rc = ieee80211_read_qos_info_element(&qos_info_element, info_element);
1504
1505         if (rc == 0) {
1506                 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1507                 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1508         } else {
1509                 struct ieee80211_qos_parameter_info param_element;
1510
1511                 rc = ieee80211_read_qos_param_element(&param_element,
1512                                                       info_element);
1513                 if (rc == 0) {
1514                         qos_param = &(network->qos_data.parameters);
1515                         ieee80211_qos_convert_ac_to_parameters(&param_element,
1516                                                                qos_param);
1517                         network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1518                         network->qos_data.param_count =
1519                             param_element.info_element.ac_info & 0x0F;
1520                 }
1521         }
1522
1523         if (rc == 0) {
1524                 IEEE80211_DEBUG_QOS("QoS is supported\n");
1525                 network->qos_data.supported = 1;
1526         }
1527         return rc;
1528 }
1529
1530 #ifdef CONFIG_IEEE80211_DEBUG
1531 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
1532
1533 static const char *get_info_element_string(u16 id)
1534 {
1535         switch (id) {
1536                 MFIE_STRING(SSID);
1537                 MFIE_STRING(RATES);
1538                 MFIE_STRING(FH_SET);
1539                 MFIE_STRING(DS_SET);
1540                 MFIE_STRING(CF_SET);
1541                 MFIE_STRING(TIM);
1542                 MFIE_STRING(IBSS_SET);
1543                 MFIE_STRING(COUNTRY);
1544                 MFIE_STRING(HOP_PARAMS);
1545                 MFIE_STRING(HOP_TABLE);
1546                 MFIE_STRING(REQUEST);
1547                 MFIE_STRING(CHALLENGE);
1548                 MFIE_STRING(POWER_CONSTRAINT);
1549                 MFIE_STRING(POWER_CAPABILITY);
1550                 MFIE_STRING(TPC_REQUEST);
1551                 MFIE_STRING(TPC_REPORT);
1552                 MFIE_STRING(SUPP_CHANNELS);
1553                 MFIE_STRING(CSA);
1554                 MFIE_STRING(MEASURE_REQUEST);
1555                 MFIE_STRING(MEASURE_REPORT);
1556                 MFIE_STRING(QUIET);
1557                 MFIE_STRING(IBSS_DFS);
1558                // MFIE_STRING(ERP_INFO);
1559                 MFIE_STRING(RSN);
1560                 MFIE_STRING(RATES_EX);
1561                 MFIE_STRING(GENERIC);
1562                 MFIE_STRING(QOS_PARAMETER);
1563         default:
1564                 return "UNKNOWN";
1565         }
1566 }
1567 #endif
1568
1569 static inline void ieee80211_extract_country_ie(
1570         struct ieee80211_device *ieee,
1571         struct ieee80211_info_element *info_element,
1572         struct ieee80211_network *network,
1573         u8 *addr2
1574 )
1575 {
1576         if (IS_DOT11D_ENABLE(ieee))
1577         {
1578                 if (info_element->len!= 0)
1579                 {
1580                         memcpy(network->CountryIeBuf, info_element->data, info_element->len);
1581                         network->CountryIeLen = info_element->len;
1582
1583                         if (!IS_COUNTRY_IE_VALID(ieee))
1584                         {
1585                                 Dot11d_UpdateCountryIe(ieee, addr2, info_element->len, info_element->data);
1586                         }
1587                 }
1588
1589                 //
1590                 // 070305, rcnjko: I update country IE watch dog here because
1591                 // some AP (e.g. Cisco 1242) don't include country IE in their
1592                 // probe response frame.
1593                 //
1594                 if (IS_EQUAL_CIE_SRC(ieee, addr2) )
1595                 {
1596                         UPDATE_CIE_WATCHDOG(ieee);
1597                 }
1598         }
1599
1600 }
1601
1602 int ieee80211_parse_info_param(struct ieee80211_device *ieee,
1603                 struct ieee80211_info_element *info_element,
1604                 u16 length,
1605                 struct ieee80211_network *network,
1606                 struct ieee80211_rx_stats *stats)
1607 {
1608         u8 i;
1609         short offset;
1610         u16     tmp_htcap_len=0;
1611         u16     tmp_htinfo_len=0;
1612         u16 ht_realtek_agg_len=0;
1613         u8  ht_realtek_agg_buf[MAX_IE_LEN];
1614 //      u16 broadcom_len = 0;
1615 #ifdef CONFIG_IEEE80211_DEBUG
1616         char rates_str[64];
1617         char *p;
1618 #endif
1619
1620         while (length >= sizeof(*info_element)) {
1621                 if (sizeof(*info_element) + info_element->len > length) {
1622                         IEEE80211_DEBUG_MGMT("Info elem: parse failed: "
1623                                              "info_element->len + 2 > left : "
1624                                              "info_element->len+2=%zd left=%d, id=%d.\n",
1625                                              info_element->len +
1626                                              sizeof(*info_element),
1627                                              length, info_element->id);
1628                         /* We stop processing but don't return an error here
1629                          * because some misbehaviour APs break this rule. ie.
1630                          * Orinoco AP1000. */
1631                         break;
1632                 }
1633
1634                 switch (info_element->id) {
1635                 case MFIE_TYPE_SSID:
1636                         if (ieee80211_is_empty_essid(info_element->data,
1637                                                      info_element->len)) {
1638                                 network->flags |= NETWORK_EMPTY_ESSID;
1639                                 break;
1640                         }
1641
1642                         network->ssid_len = min(info_element->len,
1643                                                 (u8) IW_ESSID_MAX_SIZE);
1644                         memcpy(network->ssid, info_element->data, network->ssid_len);
1645                         if (network->ssid_len < IW_ESSID_MAX_SIZE)
1646                                 memset(network->ssid + network->ssid_len, 0,
1647                                        IW_ESSID_MAX_SIZE - network->ssid_len);
1648
1649                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
1650                                              network->ssid, network->ssid_len);
1651                         break;
1652
1653                 case MFIE_TYPE_RATES:
1654 #ifdef CONFIG_IEEE80211_DEBUG
1655                         p = rates_str;
1656 #endif
1657                         network->rates_len = min(info_element->len,
1658                                                  MAX_RATES_LENGTH);
1659                         for (i = 0; i < network->rates_len; i++) {
1660                                 network->rates[i] = info_element->data[i];
1661 #ifdef CONFIG_IEEE80211_DEBUG
1662                                 p += snprintf(p, sizeof(rates_str) -
1663                                               (p - rates_str), "%02X ",
1664                                               network->rates[i]);
1665 #endif
1666                                 if (ieee80211_is_ofdm_rate
1667                                     (info_element->data[i])) {
1668                                         network->flags |= NETWORK_HAS_OFDM;
1669                                         if (info_element->data[i] &
1670                                             IEEE80211_BASIC_RATE_MASK)
1671                                                 network->flags &=
1672                                                     ~NETWORK_HAS_CCK;
1673                                 }
1674                         }
1675
1676                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
1677                                              rates_str, network->rates_len);
1678                         break;
1679
1680                 case MFIE_TYPE_RATES_EX:
1681 #ifdef CONFIG_IEEE80211_DEBUG
1682                         p = rates_str;
1683 #endif
1684                         network->rates_ex_len = min(info_element->len,
1685                                                     MAX_RATES_EX_LENGTH);
1686                         for (i = 0; i < network->rates_ex_len; i++) {
1687                                 network->rates_ex[i] = info_element->data[i];
1688 #ifdef CONFIG_IEEE80211_DEBUG
1689                                 p += snprintf(p, sizeof(rates_str) -
1690                                               (p - rates_str), "%02X ",
1691                                               network->rates_ex[i]);
1692 #endif
1693                                 if (ieee80211_is_ofdm_rate
1694                                     (info_element->data[i])) {
1695                                         network->flags |= NETWORK_HAS_OFDM;
1696                                         if (info_element->data[i] &
1697                                             IEEE80211_BASIC_RATE_MASK)
1698                                                 network->flags &=
1699                                                     ~NETWORK_HAS_CCK;
1700                                 }
1701                         }
1702
1703                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1704                                              rates_str, network->rates_ex_len);
1705                         break;
1706
1707                 case MFIE_TYPE_DS_SET:
1708                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
1709                                              info_element->data[0]);
1710                         network->channel = info_element->data[0];
1711                         break;
1712
1713                 case MFIE_TYPE_FH_SET:
1714                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
1715                         break;
1716
1717                 case MFIE_TYPE_CF_SET:
1718                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
1719                         break;
1720
1721                 case MFIE_TYPE_TIM:
1722                         if(info_element->len < 4)
1723                                 break;
1724
1725                         network->tim.tim_count = info_element->data[0];
1726                         network->tim.tim_period = info_element->data[1];
1727
1728                         network->dtim_period = info_element->data[1];
1729                         if(ieee->state != IEEE80211_LINKED)
1730                                 break;
1731
1732                         network->last_dtim_sta_time[0] = stats->mac_time[0];
1733                         network->last_dtim_sta_time[1] = stats->mac_time[1];
1734
1735                         network->dtim_data = IEEE80211_DTIM_VALID;
1736
1737                         if(info_element->data[0] != 0)
1738                                 break;
1739
1740                         if(info_element->data[2] & 1)
1741                                 network->dtim_data |= IEEE80211_DTIM_MBCAST;
1742
1743                         offset = (info_element->data[2] >> 1)*2;
1744
1745                         if(ieee->assoc_id < 8*offset ||
1746                                 ieee->assoc_id > 8*(offset + info_element->len -3))
1747
1748                                 break;
1749
1750                         offset = (ieee->assoc_id / 8) - offset;// + ((aid % 8)? 0 : 1) ;
1751
1752                         if(info_element->data[3+offset] & (1<<(ieee->assoc_id%8)))
1753                                 network->dtim_data |= IEEE80211_DTIM_UCAST;
1754
1755                         //IEEE80211_DEBUG_MGMT("MFIE_TYPE_TIM: partially ignored\n");
1756                         break;
1757
1758                 case MFIE_TYPE_ERP:
1759                         network->erp_value = info_element->data[0];
1760                         network->flags |= NETWORK_HAS_ERP_VALUE;
1761                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1762                                              network->erp_value);
1763                         break;
1764                 case MFIE_TYPE_IBSS_SET:
1765                         network->atim_window = info_element->data[0];
1766                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
1767                                              network->atim_window);
1768                         break;
1769
1770                 case MFIE_TYPE_CHALLENGE:
1771                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
1772                         break;
1773
1774                 case MFIE_TYPE_GENERIC:
1775                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
1776                                              info_element->len);
1777                         if (!ieee80211_parse_qos_info_param_IE(info_element,
1778                                                                network))
1779                                 break;
1780
1781                         if (info_element->len >= 4 &&
1782                             info_element->data[0] == 0x00 &&
1783                             info_element->data[1] == 0x50 &&
1784                             info_element->data[2] == 0xf2 &&
1785                             info_element->data[3] == 0x01) {
1786                                 network->wpa_ie_len = min(info_element->len + 2,
1787                                                           MAX_WPA_IE_LEN);
1788                                 memcpy(network->wpa_ie, info_element,
1789                                        network->wpa_ie_len);
1790                                 break;
1791                         }
1792
1793 #ifdef THOMAS_TURBO
1794                         if (info_element->len == 7 &&
1795                             info_element->data[0] == 0x00 &&
1796                             info_element->data[1] == 0xe0 &&
1797                             info_element->data[2] == 0x4c &&
1798                             info_element->data[3] == 0x01 &&
1799                             info_element->data[4] == 0x02) {
1800                                 network->Turbo_Enable = 1;
1801                         }
1802 #endif
1803
1804                         //for HTcap and HTinfo parameters
1805                         if(tmp_htcap_len == 0){
1806                                 if(info_element->len >= 4 &&
1807                                    info_element->data[0] == 0x00 &&
1808                                    info_element->data[1] == 0x90 &&
1809                                    info_element->data[2] == 0x4c &&
1810                                    info_element->data[3] == 0x033){
1811
1812                                                 tmp_htcap_len = min(info_element->len,(u8)MAX_IE_LEN);
1813                                                 if(tmp_htcap_len != 0){
1814                                                         network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1815                                                         network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf)?\
1816                                                                 sizeof(network->bssht.bdHTCapBuf):tmp_htcap_len;
1817                                                         memcpy(network->bssht.bdHTCapBuf,info_element->data,network->bssht.bdHTCapLen);
1818                                                 }
1819                                 }
1820                                 if(tmp_htcap_len != 0)
1821                                         network->bssht.bdSupportHT = true;
1822                                 else
1823                                         network->bssht.bdSupportHT = false;
1824                         }
1825
1826
1827                         if(tmp_htinfo_len == 0){
1828                                 if(info_element->len >= 4 &&
1829                                         info_element->data[0] == 0x00 &&
1830                                         info_element->data[1] == 0x90 &&
1831                                         info_element->data[2] == 0x4c &&
1832                                         info_element->data[3] == 0x034){
1833
1834                                                 tmp_htinfo_len = min(info_element->len,(u8)MAX_IE_LEN);
1835                                                 if(tmp_htinfo_len != 0){
1836                                                         network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1837                                                         if(tmp_htinfo_len){
1838                                                                 network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf)?\
1839                                                                         sizeof(network->bssht.bdHTInfoBuf):tmp_htinfo_len;
1840                                                                 memcpy(network->bssht.bdHTInfoBuf,info_element->data,network->bssht.bdHTInfoLen);
1841                                                         }
1842
1843                                                 }
1844
1845                                 }
1846                         }
1847
1848                         if(ieee->aggregation){
1849                                 if(network->bssht.bdSupportHT){
1850                                         if(info_element->len >= 4 &&
1851                                                 info_element->data[0] == 0x00 &&
1852                                                 info_element->data[1] == 0xe0 &&
1853                                                 info_element->data[2] == 0x4c &&
1854                                                 info_element->data[3] == 0x02){
1855
1856                                                 ht_realtek_agg_len = min(info_element->len,(u8)MAX_IE_LEN);
1857                                                 memcpy(ht_realtek_agg_buf,info_element->data,info_element->len);
1858
1859                                         }
1860                                         if(ht_realtek_agg_len >= 5){
1861                                                 network->bssht.bdRT2RTAggregation = true;
1862
1863                                                 if((ht_realtek_agg_buf[4] == 1) && (ht_realtek_agg_buf[5] & 0x02))
1864                                                 network->bssht.bdRT2RTLongSlotTime = true;
1865                                         }
1866                                 }
1867
1868                         }
1869
1870                         //if(tmp_htcap_len !=0  ||  tmp_htinfo_len != 0)
1871                         {
1872                                 if ((info_element->len >= 3 &&
1873                                          info_element->data[0] == 0x00 &&
1874                                          info_element->data[1] == 0x05 &&
1875                                          info_element->data[2] == 0xb5) ||
1876                                          (info_element->len >= 3 &&
1877                                          info_element->data[0] == 0x00 &&
1878                                          info_element->data[1] == 0x0a &&
1879                                          info_element->data[2] == 0xf7) ||
1880                                          (info_element->len >= 3 &&
1881                                          info_element->data[0] == 0x00 &&
1882                                          info_element->data[1] == 0x10 &&
1883                                          info_element->data[2] == 0x18)){
1884
1885                                                 network->broadcom_cap_exist = true;
1886
1887                                 }
1888                         }
1889                         if(info_element->len >= 3 &&
1890                                 info_element->data[0] == 0x00 &&
1891                                 info_element->data[1] == 0x0c &&
1892                                 info_element->data[2] == 0x43)
1893                         {
1894                                 network->ralink_cap_exist = true;
1895                         }
1896                         else
1897                                 network->ralink_cap_exist = false;
1898                         //added by amy for atheros AP
1899                         if((info_element->len >= 3 &&
1900                                 info_element->data[0] == 0x00 &&
1901                                 info_element->data[1] == 0x03 &&
1902                                 info_element->data[2] == 0x7f) ||
1903                                 (info_element->len >= 3 &&
1904                                 info_element->data[0] == 0x00 &&
1905                                 info_element->data[1] == 0x13 &&
1906                                 info_element->data[2] == 0x74))
1907                         {
1908                                 printk("========>%s(): athros AP is exist\n",__func__);
1909                                 network->atheros_cap_exist = true;
1910                         }
1911                         else
1912                                 network->atheros_cap_exist = false;
1913
1914                         if(info_element->len >= 3 &&
1915                                 info_element->data[0] == 0x00 &&
1916                                 info_element->data[1] == 0x40 &&
1917                                 info_element->data[2] == 0x96)
1918                         {
1919                                 network->cisco_cap_exist = true;
1920                         }
1921                         else
1922                                 network->cisco_cap_exist = false;
1923                         //added by amy for LEAP of cisco
1924                         if (info_element->len > 4 &&
1925                                 info_element->data[0] == 0x00 &&
1926                                 info_element->data[1] == 0x40 &&
1927                                 info_element->data[2] == 0x96 &&
1928                                 info_element->data[3] == 0x01)
1929                         {
1930                                 if(info_element->len == 6)
1931                                 {
1932                                         memcpy(network->CcxRmState, &info_element[4], 2);
1933                                         if(network->CcxRmState[0] != 0)
1934                                         {
1935                                                 network->bCcxRmEnable = true;
1936                                         }
1937                                         else
1938                                                 network->bCcxRmEnable = false;
1939                                         //
1940                                         // CCXv4 Table 59-1 MBSSID Masks.
1941                                         //
1942                                         network->MBssidMask = network->CcxRmState[1] & 0x07;
1943                                         if(network->MBssidMask != 0)
1944                                         {
1945                                                 network->bMBssidValid = true;
1946                                                 network->MBssidMask = 0xff << (network->MBssidMask);
1947                                                 cpMacAddr(network->MBssid, network->bssid);
1948                                                 network->MBssid[5] &= network->MBssidMask;
1949                                         }
1950                                         else
1951                                         {
1952                                                 network->bMBssidValid = false;
1953                                         }
1954                                 }
1955                                 else
1956                                 {
1957                                         network->bCcxRmEnable = false;
1958                                 }
1959                         }
1960                         if (info_element->len > 4  &&
1961                                 info_element->data[0] == 0x00 &&
1962                                 info_element->data[1] == 0x40 &&
1963                                 info_element->data[2] == 0x96 &&
1964                                 info_element->data[3] == 0x03)
1965                         {
1966                                 if(info_element->len == 5)
1967                                 {
1968                                         network->bWithCcxVerNum = true;
1969                                         network->BssCcxVerNumber = info_element->data[4];
1970                                 }
1971                                 else
1972                                 {
1973                                         network->bWithCcxVerNum = false;
1974                                         network->BssCcxVerNumber = 0;
1975                                 }
1976                         }
1977                         break;
1978
1979                 case MFIE_TYPE_RSN:
1980                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
1981                                              info_element->len);
1982                         network->rsn_ie_len = min(info_element->len + 2,
1983                                                   MAX_WPA_IE_LEN);
1984                         memcpy(network->rsn_ie, info_element,
1985                                network->rsn_ie_len);
1986                         break;
1987
1988                         //HT related element.
1989                 case MFIE_TYPE_HT_CAP:
1990                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_HT_CAP: %d bytes\n",
1991                                              info_element->len);
1992                         tmp_htcap_len = min(info_element->len,(u8)MAX_IE_LEN);
1993                         if(tmp_htcap_len != 0){
1994                                 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1995                                 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf)?\
1996                                         sizeof(network->bssht.bdHTCapBuf):tmp_htcap_len;
1997                                 memcpy(network->bssht.bdHTCapBuf,info_element->data,network->bssht.bdHTCapLen);
1998
1999                                 //If peer is HT, but not WMM, call QosSetLegacyWMMParamWithHT()
2000                                 // windows driver will update WMM parameters each beacon received once connected
2001                                 // Linux driver is a bit different.
2002                                 network->bssht.bdSupportHT = true;
2003                         }
2004                         else
2005                                 network->bssht.bdSupportHT = false;
2006                         break;
2007
2008
2009                 case MFIE_TYPE_HT_INFO:
2010                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_HT_INFO: %d bytes\n",
2011                                              info_element->len);
2012                         tmp_htinfo_len = min(info_element->len,(u8)MAX_IE_LEN);
2013                         if(tmp_htinfo_len){
2014                                 network->bssht.bdHTSpecVer = HT_SPEC_VER_IEEE;
2015                                 network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf)?\
2016                                         sizeof(network->bssht.bdHTInfoBuf):tmp_htinfo_len;
2017                                 memcpy(network->bssht.bdHTInfoBuf,info_element->data,network->bssht.bdHTInfoLen);
2018                         }
2019                         break;
2020
2021                 case MFIE_TYPE_AIRONET:
2022                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_AIRONET: %d bytes\n",
2023                                              info_element->len);
2024                         if(info_element->len >IE_CISCO_FLAG_POSITION)
2025                         {
2026                                 network->bWithAironetIE = true;
2027
2028                                 // CCX 1 spec v1.13, A01.1 CKIP Negotiation (page23):
2029                                 // "A Cisco access point advertises support for CKIP in beacon and probe response packets,
2030                                 //  by adding an Aironet element and setting one or both of the CKIP negotiation bits."
2031                                 if(     (info_element->data[IE_CISCO_FLAG_POSITION]&SUPPORT_CKIP_MIC)   ||
2032                                         (info_element->data[IE_CISCO_FLAG_POSITION]&SUPPORT_CKIP_PK)    )
2033                                 {
2034                                         network->bCkipSupported = true;
2035                                 }
2036                                 else
2037                                 {
2038                                         network->bCkipSupported = false;
2039                                 }
2040                         }
2041                         else
2042                         {
2043                                 network->bWithAironetIE = false;
2044                                 network->bCkipSupported = false;
2045                         }
2046                         break;
2047                 case MFIE_TYPE_QOS_PARAMETER:
2048                         printk(KERN_ERR
2049                                "QoS Error need to parse QOS_PARAMETER IE\n");
2050                         break;
2051
2052                 case MFIE_TYPE_COUNTRY:
2053                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_COUNTRY: %d bytes\n",
2054                                              info_element->len);
2055                         ieee80211_extract_country_ie(ieee, info_element, network, network->bssid);//addr2 is same as addr3 when from an AP
2056                         break;
2057 /* TODO */
2058                 default:
2059                         IEEE80211_DEBUG_MGMT
2060                             ("Unsupported info element: %s (%d)\n",
2061                              get_info_element_string(info_element->id),
2062                              info_element->id);
2063                         break;
2064                 }
2065
2066                 length -= sizeof(*info_element) + info_element->len;
2067                 info_element =
2068                     (struct ieee80211_info_element *)&info_element->
2069                     data[info_element->len];
2070         }
2071
2072         if(!network->atheros_cap_exist && !network->broadcom_cap_exist &&
2073                 !network->cisco_cap_exist && !network->ralink_cap_exist && !network->bssht.bdRT2RTAggregation)
2074         {
2075                 network->unknown_cap_exist = true;
2076         }
2077         else
2078         {
2079                 network->unknown_cap_exist = false;
2080         }
2081         return 0;
2082 }
2083
2084 static inline u8 ieee80211_SignalStrengthTranslate(
2085         u8  CurrSS
2086         )
2087 {
2088         u8 RetSS;
2089
2090         // Step 1. Scale mapping.
2091         if(CurrSS >= 71 && CurrSS <= 100)
2092         {
2093                 RetSS = 90 + ((CurrSS - 70) / 3);
2094         }
2095         else if(CurrSS >= 41 && CurrSS <= 70)
2096         {
2097                 RetSS = 78 + ((CurrSS - 40) / 3);
2098         }
2099         else if(CurrSS >= 31 && CurrSS <= 40)
2100         {
2101                 RetSS = 66 + (CurrSS - 30);
2102         }
2103         else if(CurrSS >= 21 && CurrSS <= 30)
2104         {
2105                 RetSS = 54 + (CurrSS - 20);
2106         }
2107         else if(CurrSS >= 5 && CurrSS <= 20)
2108         {
2109                 RetSS = 42 + (((CurrSS - 5) * 2) / 3);
2110         }
2111         else if(CurrSS == 4)
2112         {
2113                 RetSS = 36;
2114         }
2115         else if(CurrSS == 3)
2116         {
2117                 RetSS = 27;
2118         }
2119         else if(CurrSS == 2)
2120         {
2121                 RetSS = 18;
2122         }
2123         else if(CurrSS == 1)
2124         {
2125                 RetSS = 9;
2126         }
2127         else
2128         {
2129                 RetSS = CurrSS;
2130         }
2131         //RT_TRACE(COMP_DBG, DBG_LOUD, ("##### After Mapping:  LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS));
2132
2133         // Step 2. Smoothing.
2134
2135         //RT_TRACE(COMP_DBG, DBG_LOUD, ("$$$$$ After Smoothing:  LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS));
2136
2137         return RetSS;
2138 }
2139
2140 /* 0-100 index */
2141 static long ieee80211_translate_todbm(u8 signal_strength_index)
2142 {
2143         long    signal_power; // in dBm.
2144
2145         // Translate to dBm (x=0.5y-95).
2146         signal_power = (long)((signal_strength_index + 1) >> 1);
2147         signal_power -= 95;
2148
2149         return signal_power;
2150 }
2151
2152 static inline int ieee80211_network_init(
2153         struct ieee80211_device *ieee,
2154         struct ieee80211_probe_response *beacon,
2155         struct ieee80211_network *network,
2156         struct ieee80211_rx_stats *stats)
2157 {
2158 #ifdef CONFIG_IEEE80211_DEBUG
2159         //char rates_str[64];
2160         //char *p;
2161 #endif
2162
2163         network->qos_data.active = 0;
2164         network->qos_data.supported = 0;
2165         network->qos_data.param_count = 0;
2166         network->qos_data.old_param_count = 0;
2167
2168         /* Pull out fixed field data */
2169         memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
2170         network->capability = le16_to_cpu(beacon->capability);
2171         network->last_scanned = jiffies;
2172         network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
2173         network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
2174         network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
2175         /* Where to pull this? beacon->listen_interval;*/
2176         network->listen_interval = 0x0A;
2177         network->rates_len = network->rates_ex_len = 0;
2178         network->last_associate = 0;
2179         network->ssid_len = 0;
2180         network->flags = 0;
2181         network->atim_window = 0;
2182         network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
2183             0x3 : 0x0;
2184         network->berp_info_valid = false;
2185         network->broadcom_cap_exist = false;
2186         network->ralink_cap_exist = false;
2187         network->atheros_cap_exist = false;
2188         network->cisco_cap_exist = false;
2189         network->unknown_cap_exist = false;
2190 #ifdef THOMAS_TURBO
2191         network->Turbo_Enable = 0;
2192 #endif
2193         network->CountryIeLen = 0;
2194         memset(network->CountryIeBuf, 0, MAX_IE_LEN);
2195 //Initialize HT parameters
2196         //ieee80211_ht_initialize(&network->bssht);
2197         HTInitializeBssDesc(&network->bssht);
2198         if (stats->freq == IEEE80211_52GHZ_BAND) {
2199                 /* for A band (No DS info) */
2200                 network->channel = stats->received_channel;
2201         } else
2202                 network->flags |= NETWORK_HAS_CCK;
2203
2204         network->wpa_ie_len = 0;
2205         network->rsn_ie_len = 0;
2206
2207         if (ieee80211_parse_info_param
2208             (ieee,beacon->info_element, stats->len - sizeof(*beacon), network, stats))
2209                 return 1;
2210
2211         network->mode = 0;
2212         if (stats->freq == IEEE80211_52GHZ_BAND)
2213                 network->mode = IEEE_A;
2214         else {
2215                 if (network->flags & NETWORK_HAS_OFDM)
2216                         network->mode |= IEEE_G;
2217                 if (network->flags & NETWORK_HAS_CCK)
2218                         network->mode |= IEEE_B;
2219         }
2220
2221         if (network->mode == 0) {
2222                 IEEE80211_DEBUG_SCAN("Filtered out '%s (%pM)' "
2223                                      "network.\n",
2224                                      escape_essid(network->ssid,
2225                                                   network->ssid_len),
2226                                      network->bssid);
2227                 return 1;
2228         }
2229
2230         if(network->bssht.bdSupportHT){
2231                 if(network->mode == IEEE_A)
2232                         network->mode = IEEE_N_5G;
2233                 else if(network->mode & (IEEE_G | IEEE_B))
2234                         network->mode = IEEE_N_24G;
2235         }
2236         if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
2237                 network->flags |= NETWORK_EMPTY_ESSID;
2238
2239         stats->signal = 30 + (stats->SignalStrength * 70) / 100;
2240         //stats->signal = ieee80211_SignalStrengthTranslate(stats->signal);
2241         stats->noise = ieee80211_translate_todbm((u8)(100-stats->signal)) -25;
2242
2243         memcpy(&network->stats, stats, sizeof(network->stats));
2244
2245         return 0;
2246 }
2247
2248 static inline int is_same_network(struct ieee80211_network *src,
2249                                   struct ieee80211_network *dst, struct ieee80211_device *ieee)
2250 {
2251         /* A network is only a duplicate if the channel, BSSID, ESSID
2252          * and the capability field (in particular IBSS and BSS) all match.
2253          * We treat all <hidden> with the same BSSID and channel
2254          * as one network */
2255         return //((src->ssid_len == dst->ssid_len) &&
2256                 (((src->ssid_len == dst->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) &&
2257                 (src->channel == dst->channel) &&
2258                 !memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
2259                 //!memcmp(src->ssid, dst->ssid, src->ssid_len) &&
2260                 (!memcmp(src->ssid, dst->ssid, src->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) &&
2261                 ((src->capability & WLAN_CAPABILITY_IBSS) ==
2262                 (dst->capability & WLAN_CAPABILITY_IBSS)) &&
2263                 ((src->capability & WLAN_CAPABILITY_BSS) ==
2264                 (dst->capability & WLAN_CAPABILITY_BSS)));
2265 }
2266
2267 static inline void update_network(struct ieee80211_network *dst,
2268                                   struct ieee80211_network *src)
2269 {
2270         int qos_active;
2271         u8 old_param;
2272
2273         memcpy(&dst->stats, &src->stats, sizeof(struct ieee80211_rx_stats));
2274         dst->capability = src->capability;
2275         memcpy(dst->rates, src->rates, src->rates_len);
2276         dst->rates_len = src->rates_len;
2277         memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
2278         dst->rates_ex_len = src->rates_ex_len;
2279         if (src->ssid_len > 0)
2280         {
2281                 memset(dst->ssid, 0, dst->ssid_len);
2282                 dst->ssid_len = src->ssid_len;
2283                 memcpy(dst->ssid, src->ssid, src->ssid_len);
2284         }
2285         dst->mode = src->mode;
2286         dst->flags = src->flags;
2287         dst->time_stamp[0] = src->time_stamp[0];
2288         dst->time_stamp[1] = src->time_stamp[1];
2289         if (src->flags & NETWORK_HAS_ERP_VALUE)
2290         {
2291                 dst->erp_value = src->erp_value;
2292                 dst->berp_info_valid = src->berp_info_valid = true;
2293         }
2294         dst->beacon_interval = src->beacon_interval;
2295         dst->listen_interval = src->listen_interval;
2296         dst->atim_window = src->atim_window;
2297         dst->dtim_period = src->dtim_period;
2298         dst->dtim_data = src->dtim_data;
2299         dst->last_dtim_sta_time[0] = src->last_dtim_sta_time[0];
2300         dst->last_dtim_sta_time[1] = src->last_dtim_sta_time[1];
2301         memcpy(&dst->tim, &src->tim, sizeof(struct ieee80211_tim_parameters));
2302
2303         dst->bssht.bdSupportHT = src->bssht.bdSupportHT;
2304         dst->bssht.bdRT2RTAggregation = src->bssht.bdRT2RTAggregation;
2305         dst->bssht.bdHTCapLen= src->bssht.bdHTCapLen;
2306         memcpy(dst->bssht.bdHTCapBuf,src->bssht.bdHTCapBuf,src->bssht.bdHTCapLen);
2307         dst->bssht.bdHTInfoLen= src->bssht.bdHTInfoLen;
2308         memcpy(dst->bssht.bdHTInfoBuf,src->bssht.bdHTInfoBuf,src->bssht.bdHTInfoLen);
2309         dst->bssht.bdHTSpecVer = src->bssht.bdHTSpecVer;
2310         dst->bssht.bdRT2RTLongSlotTime = src->bssht.bdRT2RTLongSlotTime;
2311         dst->broadcom_cap_exist = src->broadcom_cap_exist;
2312         dst->ralink_cap_exist = src->ralink_cap_exist;
2313         dst->atheros_cap_exist = src->atheros_cap_exist;
2314         dst->cisco_cap_exist = src->cisco_cap_exist;
2315         dst->unknown_cap_exist = src->unknown_cap_exist;
2316         memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
2317         dst->wpa_ie_len = src->wpa_ie_len;
2318         memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
2319         dst->rsn_ie_len = src->rsn_ie_len;
2320
2321         dst->last_scanned = jiffies;
2322         /* qos related parameters */
2323         //qos_active = src->qos_data.active;
2324         qos_active = dst->qos_data.active;
2325         //old_param = dst->qos_data.old_param_count;
2326         old_param = dst->qos_data.param_count;
2327         if(dst->flags & NETWORK_HAS_QOS_MASK)
2328                 memcpy(&dst->qos_data, &src->qos_data,
2329                         sizeof(struct ieee80211_qos_data));
2330         else {
2331                 dst->qos_data.supported = src->qos_data.supported;
2332                 dst->qos_data.param_count = src->qos_data.param_count;
2333         }
2334
2335         if (dst->qos_data.supported == 1) {
2336                 dst->QoS_Enable = 1;
2337                 if(dst->ssid_len)
2338                         IEEE80211_DEBUG_QOS
2339                                 ("QoS the network %s is QoS supported\n",
2340                                 dst->ssid);
2341                 else
2342                         IEEE80211_DEBUG_QOS
2343                                 ("QoS the network is QoS supported\n");
2344         }
2345         dst->qos_data.active = qos_active;
2346         dst->qos_data.old_param_count = old_param;
2347
2348         /* dst->last_associate is not overwritten */
2349         dst->wmm_info = src->wmm_info; //sure to exist in beacon or probe response frame.
2350         if (src->wmm_param[0].aci_aifsn|| \
2351            src->wmm_param[1].aci_aifsn|| \
2352            src->wmm_param[2].aci_aifsn|| \
2353            src->wmm_param[3].aci_aifsn) {
2354           memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN);
2355         }
2356         //dst->QoS_Enable = src->QoS_Enable;
2357 #ifdef THOMAS_TURBO
2358         dst->Turbo_Enable = src->Turbo_Enable;
2359 #endif
2360
2361         dst->CountryIeLen = src->CountryIeLen;
2362         memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen);
2363
2364         //added by amy for LEAP
2365         dst->bWithAironetIE = src->bWithAironetIE;
2366         dst->bCkipSupported = src->bCkipSupported;
2367         memcpy(dst->CcxRmState, src->CcxRmState, 2);
2368         dst->bCcxRmEnable = src->bCcxRmEnable;
2369         dst->MBssidMask = src->MBssidMask;
2370         dst->bMBssidValid = src->bMBssidValid;
2371         memcpy(dst->MBssid, src->MBssid, 6);
2372         dst->bWithCcxVerNum = src->bWithCcxVerNum;
2373         dst->BssCcxVerNumber = src->BssCcxVerNumber;
2374
2375 }
2376
2377 static inline int is_beacon(__le16 fc)
2378 {
2379         return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON);
2380 }
2381
2382 static inline void ieee80211_process_probe_response(
2383         struct ieee80211_device *ieee,
2384         struct ieee80211_probe_response *beacon,
2385         struct ieee80211_rx_stats *stats)
2386 {
2387         struct ieee80211_network *network;
2388         struct ieee80211_network *target;
2389         struct ieee80211_network *oldest = NULL;
2390 #ifdef CONFIG_IEEE80211_DEBUG
2391         struct ieee80211_info_element *info_element = &beacon->info_element[0];
2392 #endif
2393         int fc = WLAN_FC_GET_STYPE(le16_to_cpu(beacon->header.frame_ctl));
2394         unsigned long flags;
2395         short renew;
2396         u16 capability;
2397         //u8 wmm_info;
2398
2399         network = kzalloc(sizeof(*network), GFP_ATOMIC);
2400         if (!network)
2401                 goto out;
2402
2403         capability = le16_to_cpu(beacon->capability);
2404         IEEE80211_DEBUG_SCAN(
2405                 "'%s' (%pM): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
2406                 escape_essid(info_element->data, info_element->len),
2407                 beacon->header.addr3,
2408                 (capability & (1 << 0xf)) ? '1' : '0',
2409                 (capability & (1 << 0xe)) ? '1' : '0',
2410                 (capability & (1 << 0xd)) ? '1' : '0',
2411                 (capability & (1 << 0xc)) ? '1' : '0',
2412                 (capability & (1 << 0xb)) ? '1' : '0',
2413                 (capability & (1 << 0xa)) ? '1' : '0',
2414                 (capability & (1 << 0x9)) ? '1' : '0',
2415                 (capability & (1 << 0x8)) ? '1' : '0',
2416                 (capability & (1 << 0x7)) ? '1' : '0',
2417                 (capability & (1 << 0x6)) ? '1' : '0',
2418                 (capability & (1 << 0x5)) ? '1' : '0',
2419                 (capability & (1 << 0x4)) ? '1' : '0',
2420                 (capability & (1 << 0x3)) ? '1' : '0',
2421                 (capability & (1 << 0x2)) ? '1' : '0',
2422                 (capability & (1 << 0x1)) ? '1' : '0',
2423                 (capability & (1 << 0x0)) ? '1' : '0');
2424
2425         if (ieee80211_network_init(ieee, beacon, network, stats)) {
2426                 IEEE80211_DEBUG_SCAN("Dropped '%s' (%pM) via %s.\n",
2427                                      escape_essid(info_element->data,
2428                                                   info_element->len),
2429                                      beacon->header.addr3,
2430                                      fc == IEEE80211_STYPE_PROBE_RESP ?
2431                                      "PROBE RESPONSE" : "BEACON");
2432                 goto out;
2433         }
2434
2435         // For Asus EeePc request,
2436         // (1) if wireless adapter receive get any 802.11d country code in AP beacon,
2437         //         wireless adapter should follow the country code.
2438         // (2)  If there is no any country code in beacon,
2439         //       then wireless adapter should do active scan from ch1~11 and
2440         //       passive scan from ch12~14
2441
2442         if (!IsLegalChannel(ieee, network->channel))
2443                 goto out;
2444         if (ieee->bGlobalDomain)
2445         {
2446                 if (fc == IEEE80211_STYPE_PROBE_RESP)
2447                 {
2448                         // Case 1: Country code
2449                         if(IS_COUNTRY_IE_VALID(ieee) )
2450                         {
2451                                 if (!IsLegalChannel(ieee, network->channel)) {
2452                                         printk("GetScanInfo(): For Country code, filter probe response at channel(%d).\n", network->channel);
2453                                         goto out;
2454                                 }
2455                         }
2456                         // Case 2: No any country code.
2457                         else
2458                         {
2459                                 // Filter over channel ch12~14
2460                                 if (network->channel > 11)
2461                                 {
2462                                         printk("GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n", network->channel);
2463                                         goto out;
2464                                 }
2465                         }
2466                 }
2467                 else
2468                 {
2469                         // Case 1: Country code
2470                         if(IS_COUNTRY_IE_VALID(ieee) )
2471                         {
2472                                 if (!IsLegalChannel(ieee, network->channel)) {
2473                                         printk("GetScanInfo(): For Country code, filter beacon at channel(%d).\n",network->channel);
2474                                         goto out;
2475                                 }
2476                         }
2477                         // Case 2: No any country code.
2478                         else
2479                         {
2480                                 // Filter over channel ch12~14
2481                                 if (network->channel > 14)
2482                                 {
2483                                         printk("GetScanInfo(): For Global Domain, filter beacon at channel(%d).\n",network->channel);
2484                                         goto out;
2485                                 }
2486                         }
2487                 }
2488         }
2489
2490         /* The network parsed correctly -- so now we scan our known networks
2491          * to see if we can find it in our list.
2492          *
2493          * NOTE:  This search is definitely not optimized.  Once its doing
2494          *        the "right thing" we'll optimize it for efficiency if
2495          *        necessary */
2496
2497         /* Search for this entry in the list and update it if it is
2498          * already there. */
2499
2500         spin_lock_irqsave(&ieee->lock, flags);
2501
2502         if (is_same_network(&ieee->current_network, network, ieee)) {
2503                 update_network(&ieee->current_network, network);
2504                 if ((ieee->current_network.mode == IEEE_N_24G || ieee->current_network.mode == IEEE_G)
2505                 && ieee->current_network.berp_info_valid){
2506                 if(ieee->current_network.erp_value& ERP_UseProtection)
2507                         ieee->current_network.buseprotection = true;
2508                 else
2509                         ieee->current_network.buseprotection = false;
2510                 }
2511                 if(is_beacon(beacon->header.frame_ctl))
2512                 {
2513                         if(ieee->state == IEEE80211_LINKED)
2514                                 ieee->LinkDetectInfo.NumRecvBcnInPeriod++;
2515                 }
2516                 else //hidden AP
2517                         network->flags = (~NETWORK_EMPTY_ESSID & network->flags)|(NETWORK_EMPTY_ESSID & ieee->current_network.flags);
2518         }
2519
2520         list_for_each_entry(target, &ieee->network_list, list) {
2521                 if (is_same_network(target, network, ieee))
2522                         break;
2523                 if ((oldest == NULL) ||
2524                     (target->last_scanned < oldest->last_scanned))
2525                         oldest = target;
2526         }
2527
2528         /* If we didn't find a match, then get a new network slot to initialize
2529          * with this beacon's information */
2530         if (&target->list == &ieee->network_list) {
2531                 if (list_empty(&ieee->network_free_list)) {
2532                         /* If there are no more slots, expire the oldest */
2533                         list_del(&oldest->list);
2534                         target = oldest;
2535                         IEEE80211_DEBUG_SCAN("Expired '%s' (%pM) from "
2536                                              "network list.\n",
2537                                              escape_essid(target->ssid,
2538                                                           target->ssid_len),
2539                                              target->bssid);
2540                 } else {
2541                         /* Otherwise just pull from the free list */
2542                         target = list_entry(ieee->network_free_list.next,
2543                                             struct ieee80211_network, list);
2544                         list_del(ieee->network_free_list.next);
2545                 }
2546
2547
2548 #ifdef CONFIG_IEEE80211_DEBUG
2549                 IEEE80211_DEBUG_SCAN("Adding '%s' (%pM) via %s.\n",
2550                                      escape_essid(network->ssid,
2551                                                   network->ssid_len),
2552                                      network->bssid,
2553                                      fc == IEEE80211_STYPE_PROBE_RESP ?
2554                                      "PROBE RESPONSE" : "BEACON");
2555 #endif
2556                 memcpy(target, network, sizeof(*target));
2557                 list_add_tail(&target->list, &ieee->network_list);
2558                 if(ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)
2559                         ieee80211_softmac_new_net(ieee,network);
2560         } else {
2561                 IEEE80211_DEBUG_SCAN("Updating '%s' (%pM) via %s.\n",
2562                                      escape_essid(target->ssid,
2563                                                   target->ssid_len),
2564                                      target->bssid,
2565                                      fc == IEEE80211_STYPE_PROBE_RESP ?
2566                                      "PROBE RESPONSE" : "BEACON");
2567
2568                 /* we have an entry and we are going to update it. But this entry may
2569                  * be already expired. In this case we do the same as we found a new
2570                  * net and call the new_net handler
2571                  */
2572                 renew = !time_after(target->last_scanned + ieee->scan_age, jiffies);
2573                 //YJ,add,080819,for hidden ap
2574                 if(is_beacon(beacon->header.frame_ctl) == 0)
2575                         network->flags = (~NETWORK_EMPTY_ESSID & network->flags)|(NETWORK_EMPTY_ESSID & target->flags);
2576                 //if(strncmp(network->ssid, "linksys-c",9) == 0)
2577                 //      printk("====>2 network->ssid=%s FLAG=%d target.ssid=%s FLAG=%d\n", network->ssid, network->flags, target->ssid, target->flags);
2578                 if(((network->flags & NETWORK_EMPTY_ESSID) == NETWORK_EMPTY_ESSID) \
2579                     && (((network->ssid_len > 0) && (strncmp(target->ssid, network->ssid, network->ssid_len)))\
2580                     ||((ieee->current_network.ssid_len == network->ssid_len)&&(strncmp(ieee->current_network.ssid, network->ssid, network->ssid_len) == 0)&&(ieee->state == IEEE80211_NOLINK))))
2581                         renew = 1;
2582                 //YJ,add,080819,for hidden ap,end
2583
2584                 update_network(target, network);
2585                 if(renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE))
2586                         ieee80211_softmac_new_net(ieee,network);
2587         }
2588
2589         spin_unlock_irqrestore(&ieee->lock, flags);
2590         if (is_beacon(beacon->header.frame_ctl)&&is_same_network(&ieee->current_network, network, ieee)&&\
2591                 (ieee->state == IEEE80211_LINKED)) {
2592                 if (ieee->handle_beacon != NULL) {
2593                         ieee->handle_beacon(ieee->dev,beacon,&ieee->current_network);
2594                 }
2595         }
2596
2597 out:
2598         kfree(network);
2599 }
2600
2601 void ieee80211_rx_mgt(struct ieee80211_device *ieee,
2602                       struct rtl_80211_hdr_4addr *header,
2603                       struct ieee80211_rx_stats *stats)
2604 {
2605         switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
2606
2607         case IEEE80211_STYPE_BEACON:
2608                 IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
2609                         WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
2610                 IEEE80211_DEBUG_SCAN("Beacon\n");
2611                 ieee80211_process_probe_response(
2612                         ieee, (struct ieee80211_probe_response *)header, stats);
2613                 break;
2614
2615         case IEEE80211_STYPE_PROBE_RESP:
2616                 IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
2617                         WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
2618                 IEEE80211_DEBUG_SCAN("Probe response\n");
2619                 ieee80211_process_probe_response(
2620                         ieee, (struct ieee80211_probe_response *)header, stats);
2621                 break;
2622
2623         }
2624 }
2625 EXPORT_SYMBOL(ieee80211_rx_mgt);