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