drivers/staging/rtl8192u/ieee80211/ieee80211_rx.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Original code based Host AP (software wireless LAN access point) driver
   4  * for Intersil Prism2/2.5/3 - hostap.o module, common routines
   5  *
   6  * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
   7  * <jkmaline@cc.hut.fi>
   8  * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
   9  * Copyright (c) 2004, Intel Corporation
  10  ******************************************************************************
  11
  12   Few modifications for Realtek's Wi-Fi drivers by
  13   Andrea Merello <andrea.merello@gmail.com>
  14
  15   A special thanks goes to Realtek for their support !
  16
  17 ******************************************************************************/
  18
  19
  20 #include <linux/compiler.h>
  21 #include <linux/errno.h>
  22 #include <linux/if_arp.h>
  23 #include <linux/in6.h>
  24 #include <linux/in.h>
  25 #include <linux/ip.h>
  26 #include <linux/kernel.h>
  27 #include <linux/module.h>
  28 #include <linux/netdevice.h>
  29 #include <linux/pci.h>
  30 #include <linux/proc_fs.h>
  31 #include <linux/skbuff.h>
  32 #include <linux/slab.h>
  33 #include <linux/tcp.h>
  34 #include <linux/types.h>
  35 #include <linux/wireless.h>
  36 #include <linux/etherdevice.h>
  37 #include <linux/uaccess.h>
  38 #include <linux/ctype.h>
  39
  40 #include "ieee80211.h"
  41 #include "dot11d.h"
  42 static inline void ieee80211_monitor_rx(struct ieee80211_device *ieee,
  43                                         struct sk_buff *skb,
  44                                         struct ieee80211_rx_stats *rx_stats)
  45 {
  46         struct rtl_80211_hdr_4addr *hdr = (struct rtl_80211_hdr_4addr *)skb->data;
  47         u16 fc = le16_to_cpu(hdr->frame_ctl);
  48
  49         skb->dev = ieee->dev;
  50         skb_reset_mac_header(skb);
  51
  52         skb_pull(skb, ieee80211_get_hdrlen(fc));
  53         skb->pkt_type = PACKET_OTHERHOST;
  54         skb->protocol = htons(ETH_P_80211_RAW);
  55         memset(skb->cb, 0, sizeof(skb->cb));
  56         netif_rx(skb);
  57 }
  58
  59
  60 /* Called only as a tasklet (software IRQ) */
  61 static struct ieee80211_frag_entry *
  62 ieee80211_frag_cache_find(struct ieee80211_device *ieee, unsigned int seq,
  63                           unsigned int frag, u8 tid, u8 *src, u8 *dst)
  64 {
  65         struct ieee80211_frag_entry *entry;
  66         int i;
  67
  68         for (i = 0; i < IEEE80211_FRAG_CACHE_LEN; i++) {
  69                 entry = &ieee->frag_cache[tid][i];
  70                 if (entry->skb &&
  71                     time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
  72                         IEEE80211_DEBUG_FRAG(
  73                                 "expiring fragment cache entry "
  74                                 "seq=%u last_frag=%u\n",
  75                                 entry->seq, entry->last_frag);
  76                         dev_kfree_skb_any(entry->skb);
  77                         entry->skb = NULL;
  78                 }
  79
  80                 if (entry->skb && entry->seq == seq &&
  81                     (entry->last_frag + 1 == frag || frag == -1) &&
  82                     memcmp(entry->src_addr, src, ETH_ALEN) == 0 &&
  83                     memcmp(entry->dst_addr, dst, ETH_ALEN) == 0)
  84                         return entry;
  85         }
  86
  87         return NULL;
  88 }
  89
  90 /* Called only as a tasklet (software IRQ) */
  91 static struct sk_buff *
  92 ieee80211_frag_cache_get(struct ieee80211_device *ieee,
  93                          struct rtl_80211_hdr_4addr *hdr)
  94 {
  95         struct sk_buff *skb = NULL;
  96         u16 fc = le16_to_cpu(hdr->frame_ctl);
  97         u16 sc = le16_to_cpu(hdr->seq_ctl);
  98         unsigned int frag = WLAN_GET_SEQ_FRAG(sc);
  99         unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
 100         struct ieee80211_frag_entry *entry;
 101         struct rtl_80211_hdr_3addrqos *hdr_3addrqos;
 102         struct rtl_80211_hdr_4addrqos *hdr_4addrqos;
 103         u8 tid;
 104
 105         if (((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS) && IEEE80211_QOS_HAS_SEQ(fc)) {
 106                 hdr_4addrqos = (struct rtl_80211_hdr_4addrqos *)hdr;
 107                 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QCTL_TID;
 108                 tid = UP2AC(tid);
 109                 tid++;
 110         } else if (IEEE80211_QOS_HAS_SEQ(fc)) {
 111                 hdr_3addrqos = (struct rtl_80211_hdr_3addrqos *)hdr;
 112                 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QCTL_TID;
 113                 tid = UP2AC(tid);
 114                 tid++;
 115         } else {
 116                 tid = 0;
 117         }
 118
 119         if (frag == 0) {
 120                 /* Reserve enough space to fit maximum frame length */
 121                 skb = dev_alloc_skb(ieee->dev->mtu +
 122                                     sizeof(struct rtl_80211_hdr_4addr) +
 123                                     8 /* LLC */ +
 124                                     2 /* alignment */ +
 125                                     8 /* WEP */ +
 126                                     ETH_ALEN /* WDS */ +
 127                                     (IEEE80211_QOS_HAS_SEQ(fc) ? 2 : 0) /* QOS Control */);
 128                 if (!skb)
 129                         return NULL;
 130
 131                 entry = &ieee->frag_cache[tid][ieee->frag_next_idx[tid]];
 132                 ieee->frag_next_idx[tid]++;
 133                 if (ieee->frag_next_idx[tid] >= IEEE80211_FRAG_CACHE_LEN)
 134                         ieee->frag_next_idx[tid] = 0;
 135
 136                 if (entry->skb)
 137                         dev_kfree_skb_any(entry->skb);
 138
 139                 entry->first_frag_time = jiffies;
 140                 entry->seq = seq;
 141                 entry->last_frag = frag;
 142                 entry->skb = skb;
 143                 memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
 144                 memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
 145         } else {
 146                 /* received a fragment of a frame for which the head fragment
 147                  * should have already been received */
 148                 entry = ieee80211_frag_cache_find(ieee, seq, frag, tid, hdr->addr2,
 149                                                   hdr->addr1);
 150                 if (entry) {
 151                         entry->last_frag = frag;
 152                         skb = entry->skb;
 153                 }
 154         }
 155
 156         return skb;
 157 }
 158
 159
 160 /* Called only as a tasklet (software IRQ) */
 161 static int ieee80211_frag_cache_invalidate(struct ieee80211_device *ieee,
 162                                            struct rtl_80211_hdr_4addr *hdr)
 163 {
 164         u16 fc = le16_to_cpu(hdr->frame_ctl);
 165         u16 sc = le16_to_cpu(hdr->seq_ctl);
 166         unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
 167         struct ieee80211_frag_entry *entry;
 168         struct rtl_80211_hdr_3addrqos *hdr_3addrqos;
 169         struct rtl_80211_hdr_4addrqos *hdr_4addrqos;
 170         u8 tid;
 171
 172         if (((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS) && IEEE80211_QOS_HAS_SEQ(fc)) {
 173                 hdr_4addrqos = (struct rtl_80211_hdr_4addrqos *)hdr;
 174                 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QCTL_TID;
 175                 tid = UP2AC(tid);
 176                 tid++;
 177         } else if (IEEE80211_QOS_HAS_SEQ(fc)) {
 178                 hdr_3addrqos = (struct rtl_80211_hdr_3addrqos *)hdr;
 179                 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QCTL_TID;
 180                 tid = UP2AC(tid);
 181                 tid++;
 182         } else {
 183                 tid = 0;
 184         }
 185
 186         entry = ieee80211_frag_cache_find(ieee, seq, -1, tid, hdr->addr2,
 187                                           hdr->addr1);
 188
 189         if (!entry) {
 190                 IEEE80211_DEBUG_FRAG(
 191                         "could not invalidate fragment cache "
 192                         "entry (seq=%u)\n", seq);
 193                 return -1;
 194         }
 195
 196         entry->skb = NULL;
 197         return 0;
 198 }
 199
 200
 201
 202 /* ieee80211_rx_frame_mgtmt
 203  *
 204  * Responsible for handling management control frames
 205  *
 206  * Called by ieee80211_rx */
 207 static inline int
 208 ieee80211_rx_frame_mgmt(struct ieee80211_device *ieee, struct sk_buff *skb,
 209                         struct ieee80211_rx_stats *rx_stats, u16 type,
 210                         u16 stype)
 211 {
 212         /* On the struct stats definition there is written that
 213          * this is not mandatory.... but seems that the probe
 214          * response parser uses it
 215          */
 216         struct rtl_80211_hdr_3addr *hdr = (struct rtl_80211_hdr_3addr *)skb->data;
 217
 218         rx_stats->len = skb->len;
 219         ieee80211_rx_mgt(ieee, (struct rtl_80211_hdr_4addr *)skb->data, rx_stats);
 220         /* if ((ieee->state == IEEE80211_LINKED) && (memcmp(hdr->addr3, ieee->current_network.bssid, ETH_ALEN))) */
 221         if ((memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN))) {
 222                 /* use ADDR1 to perform address matching for Management frames */
 223                 dev_kfree_skb_any(skb);
 224                 return 0;
 225         }
 226
 227         ieee80211_rx_frame_softmac(ieee, skb, rx_stats, type, stype);
 228
 229         dev_kfree_skb_any(skb);
 230
 231         return 0;
 232
 233         #ifdef NOT_YET
 234         if (ieee->iw_mode == IW_MODE_MASTER) {
 235                 netdev_dbg(ieee->dev, "Master mode not yet supported.\n");
 236                 return 0;
 237 /*
 238   hostap_update_sta_ps(ieee, (struct hostap_ieee80211_hdr_4addr *)
 239   skb->data);*/
 240         }
 241
 242         if (ieee->hostapd && type == IEEE80211_TYPE_MGMT) {
 243                 if (stype == WLAN_FC_STYPE_BEACON &&
 244                     ieee->iw_mode == IW_MODE_MASTER) {
 245                         struct sk_buff *skb2;
 246                         /* Process beacon frames also in kernel driver to
 247                          * update STA(AP) table statistics */
 248                         skb2 = skb_clone(skb, GFP_ATOMIC);
 249                         if (skb2)
 250                                 hostap_rx(skb2->dev, skb2, rx_stats);
 251                 }
 252
 253                 /* send management frames to the user space daemon for
 254                  * processing */
 255                 ieee->apdevstats.rx_packets++;
 256                 ieee->apdevstats.rx_bytes += skb->len;
 257                 prism2_rx_80211(ieee->apdev, skb, rx_stats, PRISM2_RX_MGMT);
 258                 return 0;
 259         }
 260
 261             if (ieee->iw_mode == IW_MODE_MASTER) {
 262                 if (type != WLAN_FC_TYPE_MGMT && type != WLAN_FC_TYPE_CTRL) {
 263                         netdev_dbg(skb->dev, "unknown management frame "
 264                                "(type=0x%02x, stype=0x%02x) dropped\n",
 265                                type, stype);
 266                         return -1;
 267                 }
 268
 269                 hostap_rx(skb->dev, skb, rx_stats);
 270                 return 0;
 271         }
 272
 273         netdev_dbg(skb->dev, "hostap_rx_frame_mgmt: management frame "
 274                "received in non-Host AP mode\n");
 275         return -1;
 276         #endif
 277 }
 278
 279
 280
 281 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation */
 282 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
 283 static unsigned char rfc1042_header[] = {
 284         0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
 285 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
 286 static unsigned char bridge_tunnel_header[] = {
 287         0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8 };
 288 /* No encapsulation header if EtherType < 0x600 (=length) */
 289
 290 /* Called by ieee80211_rx_frame_decrypt */
 291 static int ieee80211_is_eapol_frame(struct ieee80211_device *ieee,
 292                                     struct sk_buff *skb, size_t hdrlen)
 293 {
 294         struct net_device *dev = ieee->dev;
 295         u16 fc, ethertype;
 296         struct rtl_80211_hdr_4addr *hdr;
 297         u8 *pos;
 298
 299         if (skb->len < 24)
 300                 return 0;
 301
 302         hdr = (struct rtl_80211_hdr_4addr *)skb->data;
 303         fc = le16_to_cpu(hdr->frame_ctl);
 304
 305         /* check that the frame is unicast frame to us */
 306         if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 307             IEEE80211_FCTL_TODS &&
 308             memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 &&
 309             memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
 310                 /* ToDS frame with own addr BSSID and DA */
 311         } else if ((fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) ==
 312                    IEEE80211_FCTL_FROMDS &&
 313                    memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
 314                 /* FromDS frame with own addr as DA */
 315         } else
 316                 return 0;
 317
 318         if (skb->len < 24 + 8)
 319                 return 0;
 320
 321         /* check for port access entity Ethernet type */
 322 //      pos = skb->data + 24;
 323         pos = skb->data + hdrlen;
 324         ethertype = (pos[6] << 8) | pos[7];
 325         if (ethertype == ETH_P_PAE)
 326                 return 1;
 327
 328         return 0;
 329 }
 330
 331 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
 332 static inline int
 333 ieee80211_rx_frame_decrypt(struct ieee80211_device *ieee, struct sk_buff *skb,
 334                            struct ieee80211_crypt_data *crypt)
 335 {
 336         struct rtl_80211_hdr_4addr *hdr;
 337         int res, hdrlen;
 338
 339         if (!crypt || !crypt->ops->decrypt_mpdu)
 340                 return 0;
 341         if (ieee->hwsec_active) {
 342                 struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
 343                 tcb_desc->bHwSec = 1;
 344         }
 345         hdr = (struct rtl_80211_hdr_4addr *)skb->data;
 346         hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 347
 348         if (ieee->tkip_countermeasures &&
 349             strcmp(crypt->ops->name, "TKIP") == 0) {
 350                 if (net_ratelimit()) {
 351                         netdev_dbg(ieee->dev, "TKIP countermeasures: dropped "
 352                                "received packet from %pM\n",
 353                                hdr->addr2);
 354                 }
 355                 return -1;
 356         }
 357
 358         atomic_inc(&crypt->refcnt);
 359         res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
 360         atomic_dec(&crypt->refcnt);
 361         if (res < 0) {
 362                 IEEE80211_DEBUG_DROP(
 363                         "decryption failed (SA=%pM"
 364                         ") res=%d\n", hdr->addr2, res);
 365                 if (res == -2)
 366                         IEEE80211_DEBUG_DROP("Decryption failed ICV "
 367                                              "mismatch (key %d)\n",
 368                                              skb->data[hdrlen + 3] >> 6);
 369                 ieee->ieee_stats.rx_discards_undecryptable++;
 370                 return -1;
 371         }
 372
 373         return res;
 374 }
 375
 376
 377 /* Called only as a tasklet (software IRQ), by ieee80211_rx */
 378 static inline int
 379 ieee80211_rx_frame_decrypt_msdu(struct ieee80211_device *ieee, struct sk_buff *skb,
 380                              int keyidx, struct ieee80211_crypt_data *crypt)
 381 {
 382         struct rtl_80211_hdr_4addr *hdr;
 383         int res, hdrlen;
 384
 385         if (!crypt || !crypt->ops->decrypt_msdu)
 386                 return 0;
 387         if (ieee->hwsec_active) {
 388                 struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
 389                 tcb_desc->bHwSec = 1;
 390         }
 391
 392         hdr = (struct rtl_80211_hdr_4addr *)skb->data;
 393         hdrlen = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 394
 395         atomic_inc(&crypt->refcnt);
 396         res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
 397         atomic_dec(&crypt->refcnt);
 398         if (res < 0) {
 399                 netdev_dbg(ieee->dev, "MSDU decryption/MIC verification failed"
 400                        " (SA=%pM keyidx=%d)\n",
 401                        hdr->addr2, keyidx);
 402                 return -1;
 403         }
 404
 405         return 0;
 406 }
 407
 408
 409 /* this function is stolen from ipw2200 driver*/
 410 #define IEEE_PACKET_RETRY_TIME (5 * HZ)
 411 static int is_duplicate_packet(struct ieee80211_device *ieee,
 412                                       struct rtl_80211_hdr_4addr *header)
 413 {
 414         u16 fc = le16_to_cpu(header->frame_ctl);
 415         u16 sc = le16_to_cpu(header->seq_ctl);
 416         u16 seq = WLAN_GET_SEQ_SEQ(sc);
 417         u16 frag = WLAN_GET_SEQ_FRAG(sc);
 418         u16 *last_seq, *last_frag;
 419         unsigned long *last_time;
 420         struct rtl_80211_hdr_3addrqos *hdr_3addrqos;
 421         struct rtl_80211_hdr_4addrqos *hdr_4addrqos;
 422         u8 tid;
 423
 424
 425         //TO2DS and QoS
 426         if (((fc & IEEE80211_FCTL_DSTODS) == IEEE80211_FCTL_DSTODS) && IEEE80211_QOS_HAS_SEQ(fc)) {
 427                 hdr_4addrqos = (struct rtl_80211_hdr_4addrqos *)header;
 428                 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & IEEE80211_QCTL_TID;
 429                 tid = UP2AC(tid);
 430                 tid++;
 431         } else if (IEEE80211_QOS_HAS_SEQ(fc)) { //QoS
 432                 hdr_3addrqos = (struct rtl_80211_hdr_3addrqos *)header;
 433                 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & IEEE80211_QCTL_TID;
 434                 tid = UP2AC(tid);
 435                 tid++;
 436         } else { // no QoS
 437                 tid = 0;
 438         }
 439
 440         switch (ieee->iw_mode) {
 441         case IW_MODE_ADHOC:
 442         {
 443                 struct list_head *p;
 444                 struct ieee_ibss_seq *entry = NULL;
 445                 u8 *mac = header->addr2;
 446                 int index = mac[5] % IEEE_IBSS_MAC_HASH_SIZE;
 447
 448                 list_for_each(p, &ieee->ibss_mac_hash[index]) {
 449                         entry = list_entry(p, struct ieee_ibss_seq, list);
 450                         if (!memcmp(entry->mac, mac, ETH_ALEN))
 451                                 break;
 452                 }
 453         //      if (memcmp(entry->mac, mac, ETH_ALEN)){
 454                 if (p == &ieee->ibss_mac_hash[index]) {
 455                         entry = kmalloc(sizeof(struct ieee_ibss_seq), GFP_ATOMIC);
 456                         if (!entry)
 457                                 return 0;
 458                         memcpy(entry->mac, mac, ETH_ALEN);
 459                         entry->seq_num[tid] = seq;
 460                         entry->frag_num[tid] = frag;
 461                         entry->packet_time[tid] = jiffies;
 462                         list_add(&entry->list, &ieee->ibss_mac_hash[index]);
 463                         return 0;
 464                 }
 465                 last_seq = &entry->seq_num[tid];
 466                 last_frag = &entry->frag_num[tid];
 467                 last_time = &entry->packet_time[tid];
 468                 break;
 469         }
 470
 471         case IW_MODE_INFRA:
 472                 last_seq = &ieee->last_rxseq_num[tid];
 473                 last_frag = &ieee->last_rxfrag_num[tid];
 474                 last_time = &ieee->last_packet_time[tid];
 475
 476                 break;
 477         default:
 478                 return 0;
 479         }
 480
 481 //      if(tid != 0) {
 482 //              printk(KERN_WARNING ":)))))))))))%x %x %x, fc(%x)\n", tid, *last_seq, seq, header->frame_ctl);
 483 //      }
 484         if ((*last_seq == seq) &&
 485             time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) {
 486                 if (*last_frag == frag)
 487                         goto drop;
 488                 if (*last_frag + 1 != frag)
 489                         /* out-of-order fragment */
 490                         goto drop;
 491         } else
 492                 *last_seq = seq;
 493
 494         *last_frag = frag;
 495         *last_time = jiffies;
 496         return 0;
 497
 498 drop:
 499 //      BUG_ON(!(fc & IEEE80211_FCTL_RETRY));
 500
 501         return 1;
 502 }
 503
 504 static bool AddReorderEntry(struct rx_ts_record *pTS, struct rx_reorder_entry *pReorderEntry)
 505 {
 506         struct list_head *pList = &pTS->rx_pending_pkt_list;
 507         while (pList->next != &pTS->rx_pending_pkt_list) {
 508                 if (SN_LESS(pReorderEntry->SeqNum, list_entry(pList->next, struct rx_reorder_entry, List)->SeqNum))
 509                         pList = pList->next;
 510                 else if (SN_EQUAL(pReorderEntry->SeqNum, list_entry(pList->next, struct rx_reorder_entry, List)->SeqNum))
 511                         return false;
 512                 else
 513                         break;
 514         }
 515         pReorderEntry->List.next = pList->next;
 516         pReorderEntry->List.next->prev = &pReorderEntry->List;
 517         pReorderEntry->List.prev = pList;
 518         pList->next = &pReorderEntry->List;
 519
 520         return true;
 521 }
 522
 523 static void indicate_packets(struct ieee80211_device *ieee,
 524                              struct ieee80211_rxb *rxb)
 525 {
 526         struct net_device_stats *stats = &ieee->stats;
 527         struct net_device *dev = ieee->dev;
 528         u16 ethertype;
 529         u8 i;
 530
 531         for (i = 0; i < rxb->nr_subframes; i++) {
 532                 struct sk_buff *sub_skb = rxb->subframes[i];
 533
 534                 if (!sub_skb)
 535                         continue;
 536
 537                 /* convert hdr + possible LLC headers into Ethernet header */
 538                 ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
 539                 if (sub_skb->len >= 8 &&
 540                     ((!memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) &&
 541                         ethertype != ETH_P_AARP &&
 542                         ethertype != ETH_P_IPX) ||
 543                      !memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE))) {
 544                         /* remove RFC1042 or Bridge-Tunnel encapsulation and
 545                          * replace EtherType */
 546                         skb_pull(sub_skb, SNAP_SIZE);
 547                 } else {
 548                         /* Leave Ethernet header part of hdr and full payload */
 549                         put_unaligned_be16(sub_skb->len, skb_push(sub_skb, 2));
 550                 }
 551                 memcpy(skb_push(sub_skb, ETH_ALEN), rxb->src, ETH_ALEN);
 552                 memcpy(skb_push(sub_skb, ETH_ALEN), rxb->dst, ETH_ALEN);
 553
 554                 stats->rx_packets++;
 555                 stats->rx_bytes += sub_skb->len;
 556                 if (is_multicast_ether_addr(rxb->dst))
 557                         stats->multicast++;
 558
 559                 /* Indicate the packets to upper layer */
 560                 sub_skb->protocol = eth_type_trans(sub_skb, dev);
 561                 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
 562                 sub_skb->dev = dev;
 563                 /* 802.11 crc not sufficient */
 564                 sub_skb->ip_summed = CHECKSUM_NONE;
 565                 ieee->last_rx_ps_time = jiffies;
 566                 netif_rx(sub_skb);
 567         }
 568 }
 569
 570 void ieee80211_indicate_packets(struct ieee80211_device *ieee,
 571                                 struct ieee80211_rxb **prxbIndicateArray,
 572                                 u8 index)
 573 {
 574         u8 i;
 575
 576         for (i = 0; i < index; i++) {
 577                 struct ieee80211_rxb *prxb = prxbIndicateArray[i];
 578
 579                 indicate_packets(ieee, prxb);
 580                 kfree(prxb);
 581                 prxb = NULL;
 582         }
 583 }
 584
 585 static void RxReorderIndicatePacket(struct ieee80211_device *ieee,
 586                                     struct ieee80211_rxb *prxb,
 587                                     struct rx_ts_record *pTS, u16 SeqNum)
 588 {
 589         PRT_HIGH_THROUGHPUT     pHTInfo = ieee->pHTInfo;
 590         struct rx_reorder_entry *pReorderEntry = NULL;
 591         struct ieee80211_rxb **prxbIndicateArray;
 592         u8                      WinSize = pHTInfo->RxReorderWinSize;
 593         u16                     WinEnd = (pTS->rx_indicate_seq + WinSize - 1) % 4096;
 594         u8                      index = 0;
 595         bool                    bMatchWinStart = false, bPktInBuf = false;
 596         IEEE80211_DEBUG(IEEE80211_DL_REORDER, "%s(): Seq is %d,pTS->rx_indicate_seq is %d, WinSize is %d\n", __func__, SeqNum, pTS->rx_indicate_seq, WinSize);
 597
 598         prxbIndicateArray = kmalloc_array(REORDER_WIN_SIZE,
 599                                           sizeof(struct ieee80211_rxb *),
 600                                           GFP_ATOMIC);
 601         if (!prxbIndicateArray)
 602                 return;
 603
 604         /* Rx Reorder initialize condition.*/
 605         if (pTS->rx_indicate_seq == 0xffff)
 606                 pTS->rx_indicate_seq = SeqNum;
 607
 608         /* Drop out the packet which SeqNum is smaller than WinStart */
 609         if (SN_LESS(SeqNum, pTS->rx_indicate_seq)) {
 610                 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "Packet Drop! IndicateSeq: %d, NewSeq: %d\n",
 611                                  pTS->rx_indicate_seq, SeqNum);
 612                 pHTInfo->RxReorderDropCounter++;
 613                 {
 614                         int i;
 615                         for (i = 0; i < prxb->nr_subframes; i++) {
 616                                 dev_kfree_skb(prxb->subframes[i]);
 617                         }
 618                         kfree(prxb);
 619                         prxb = NULL;
 620                 }
 621
 622                 kfree(prxbIndicateArray);
 623                 return;
 624         }
 625
 626         /*
 627          * Sliding window manipulation. Conditions includes:
 628          * 1. Incoming SeqNum is equal to WinStart =>Window shift 1
 629          * 2. Incoming SeqNum is larger than the WinEnd => Window shift N
 630          */
 631         if (SN_EQUAL(SeqNum, pTS->rx_indicate_seq)) {
 632                 pTS->rx_indicate_seq = (pTS->rx_indicate_seq + 1) % 4096;
 633                 bMatchWinStart = true;
 634         } else if (SN_LESS(WinEnd, SeqNum)) {
 635                 if (SeqNum >= (WinSize - 1)) {
 636                         pTS->rx_indicate_seq = SeqNum + 1 - WinSize;
 637                 } else {
 638                         pTS->rx_indicate_seq = 4095 - (WinSize - (SeqNum + 1)) + 1;
 639                 }
 640                 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "Window Shift! IndicateSeq: %d, NewSeq: %d\n", pTS->rx_indicate_seq, SeqNum);
 641         }
 642
 643         /*
 644          * Indication process.
 645          * After Packet dropping and Sliding Window shifting as above, we can now just indicate the packets
 646          * with the SeqNum smaller than latest WinStart and buffer other packets.
 647          */
 648         /* For Rx Reorder condition:
 649          * 1. All packets with SeqNum smaller than WinStart => Indicate
 650          * 2. All packets with SeqNum larger than or equal to WinStart => Buffer it.
 651          */
 652         if (bMatchWinStart) {
 653                 /* Current packet is going to be indicated.*/
 654                 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "Packets indication!! IndicateSeq: %d, NewSeq: %d\n",\
 655                                 pTS->rx_indicate_seq, SeqNum);
 656                 prxbIndicateArray[0] = prxb;
 657 //              printk("========================>%s(): SeqNum is %d\n",__func__,SeqNum);
 658                 index = 1;
 659         } else {
 660                 /* Current packet is going to be inserted into pending list.*/
 661                 //IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): We RX no ordered packed, insert to ordered list\n",__func__);
 662                 if (!list_empty(&ieee->RxReorder_Unused_List)) {
 663                         pReorderEntry = list_entry(ieee->RxReorder_Unused_List.next, struct rx_reorder_entry, List);
 664                         list_del_init(&pReorderEntry->List);
 665
 666                         /* Make a reorder entry and insert into a the packet list.*/
 667                         pReorderEntry->SeqNum = SeqNum;
 668                         pReorderEntry->prxb = prxb;
 669         //              IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): pREorderEntry->SeqNum is %d\n",__func__,pReorderEntry->SeqNum);
 670
 671                         if (!AddReorderEntry(pTS, pReorderEntry)) {
 672                                 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "%s(): Duplicate packet is dropped!! IndicateSeq: %d, NewSeq: %d\n",
 673                                         __func__, pTS->rx_indicate_seq, SeqNum);
 674                                 list_add_tail(&pReorderEntry->List, &ieee->RxReorder_Unused_List);
 675                                 {
 676                                         int i;
 677                                         for (i = 0; i < prxb->nr_subframes; i++) {
 678                                                 dev_kfree_skb(prxb->subframes[i]);
 679                                         }
 680                                         kfree(prxb);
 681                                         prxb = NULL;
 682                                 }
 683                         } else {
 684                                 IEEE80211_DEBUG(IEEE80211_DL_REORDER,
 685                                          "Pkt insert into buffer!! IndicateSeq: %d, NewSeq: %d\n", pTS->rx_indicate_seq, SeqNum);
 686                         }
 687                 } else {
 688                         /*
 689                          * Packets are dropped if there is not enough reorder entries.
 690                          * This part shall be modified!! We can just indicate all the
 691                          * packets in buffer and get reorder entries.
 692                          */
 693                         IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): There is no reorder entry!! Packet is dropped!!\n");
 694                         {
 695                                 int i;
 696                                 for (i = 0; i < prxb->nr_subframes; i++) {
 697                                         dev_kfree_skb(prxb->subframes[i]);
 698                                 }
 699                                 kfree(prxb);
 700                                 prxb = NULL;
 701                         }
 702                 }
 703         }
 704
 705         /* Check if there is any packet need indicate.*/
 706         while (!list_empty(&pTS->rx_pending_pkt_list)) {
 707                 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "%s(): start RREORDER indicate\n", __func__);
 708                 pReorderEntry = list_entry(pTS->rx_pending_pkt_list.prev, struct rx_reorder_entry, List);
 709                 if (SN_LESS(pReorderEntry->SeqNum, pTS->rx_indicate_seq) ||
 710                     SN_EQUAL(pReorderEntry->SeqNum, pTS->rx_indicate_seq)) {
 711                         /* This protect buffer from overflow. */
 712                         if (index >= REORDER_WIN_SIZE) {
 713                                 IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): Buffer overflow!! \n");
 714                                 bPktInBuf = true;
 715                                 break;
 716                         }
 717
 718                         list_del_init(&pReorderEntry->List);
 719
 720                         if (SN_EQUAL(pReorderEntry->SeqNum, pTS->rx_indicate_seq))
 721                                 pTS->rx_indicate_seq = (pTS->rx_indicate_seq + 1) % 4096;
 722
 723                         IEEE80211_DEBUG(IEEE80211_DL_REORDER, "Packets indication!! IndicateSeq: %d, NewSeq: %d\n", pTS->rx_indicate_seq, SeqNum);
 724                         prxbIndicateArray[index] = pReorderEntry->prxb;
 725                 //      printk("========================>%s(): pReorderEntry->SeqNum is %d\n",__func__,pReorderEntry->SeqNum);
 726                         index++;
 727
 728                         list_add_tail(&pReorderEntry->List, &ieee->RxReorder_Unused_List);
 729                 } else {
 730                         bPktInBuf = true;
 731                         break;
 732                 }
 733         }
 734
 735         /* Handling pending timer. Set this timer to prevent from long time Rx buffering.*/
 736         if (index > 0) {
 737                 // Cancel previous pending timer.
 738         //      del_timer_sync(&pTS->rx_pkt_pending_timer);
 739                 pTS->rx_timeout_indicate_seq = 0xffff;
 740
 741                 // Indicate packets
 742                 if (index > REORDER_WIN_SIZE) {
 743                         IEEE80211_DEBUG(IEEE80211_DL_ERR, "RxReorderIndicatePacket(): Rx Reorder buffer full!! \n");
 744                         kfree(prxbIndicateArray);
 745                         return;
 746                 }
 747                 ieee80211_indicate_packets(ieee, prxbIndicateArray, index);
 748         }
 749
 750         if (bPktInBuf && pTS->rx_timeout_indicate_seq == 0xffff) {
 751                 // Set new pending timer.
 752                 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "%s(): SET rx timeout timer\n", __func__);
 753                 pTS->rx_timeout_indicate_seq = pTS->rx_indicate_seq;
 754                 if (timer_pending(&pTS->rx_pkt_pending_timer))
 755                         del_timer_sync(&pTS->rx_pkt_pending_timer);
 756                 pTS->rx_pkt_pending_timer.expires = jiffies +
 757                                 msecs_to_jiffies(pHTInfo->RxReorderPendingTime);
 758                 add_timer(&pTS->rx_pkt_pending_timer);
 759         }
 760
 761         kfree(prxbIndicateArray);
 762 }
 763
 764 static u8 parse_subframe(struct ieee80211_device *ieee,
 765                          struct sk_buff *skb,
 766                          struct ieee80211_rx_stats *rx_stats,
 767                          struct ieee80211_rxb *rxb, u8 *src, u8 *dst)
 768 {
 769         struct rtl_80211_hdr_3addr  *hdr = (struct rtl_80211_hdr_3addr *)skb->data;
 770         u16             fc = le16_to_cpu(hdr->frame_ctl);
 771
 772         u16             LLCOffset = sizeof(struct rtl_80211_hdr_3addr);
 773         u16             ChkLength;
 774         bool            bIsAggregateFrame = false;
 775         u16             nSubframe_Length;
 776         u8              nPadding_Length = 0;
 777         u16             SeqNum = 0;
 778
 779         struct sk_buff *sub_skb;
 780         /* just for debug purpose */
 781         SeqNum = WLAN_GET_SEQ_SEQ(le16_to_cpu(hdr->seq_ctl));
 782
 783         if ((IEEE80211_QOS_HAS_SEQ(fc)) && \
 784                         (((frameqos *)(skb->data + IEEE80211_3ADDR_LEN))->field.reserved)) {
 785                 bIsAggregateFrame = true;
 786         }
 787
 788         if (IEEE80211_QOS_HAS_SEQ(fc)) {
 789                 LLCOffset += 2;
 790         }
 791
 792         if (rx_stats->bContainHTC) {
 793                 LLCOffset += HTCLNG;
 794         }
 795         // Null packet, don't indicate it to upper layer
 796         ChkLength = LLCOffset;/* + (Frame_WEP(frame)!=0 ?Adapter->MgntInfo.SecurityInfo.EncryptionHeadOverhead:0);*/
 797
 798         if (skb->len <= ChkLength)
 799                 return 0;
 800
 801         skb_pull(skb, LLCOffset);
 802
 803         if (!bIsAggregateFrame) {
 804                 rxb->nr_subframes = 1;
 805 #ifdef JOHN_NOCPY
 806                 rxb->subframes[0] = skb;
 807 #else
 808                 rxb->subframes[0] = skb_copy(skb, GFP_ATOMIC);
 809 #endif
 810
 811                 memcpy(rxb->src, src, ETH_ALEN);
 812                 memcpy(rxb->dst, dst, ETH_ALEN);
 813                 //IEEE80211_DEBUG_DATA(IEEE80211_DL_RX,skb->data,skb->len);
 814                 return 1;
 815         } else {
 816                 rxb->nr_subframes = 0;
 817                 memcpy(rxb->src, src, ETH_ALEN);
 818                 memcpy(rxb->dst, dst, ETH_ALEN);
 819                 while (skb->len > ETHERNET_HEADER_SIZE) {
 820                         /* Offset 12 denote 2 mac address */
 821                         nSubframe_Length = *((u16 *)(skb->data + 12));
 822                         //==m==>change the length order
 823                         nSubframe_Length = (nSubframe_Length >> 8) + (nSubframe_Length << 8);
 824
 825                         if (skb->len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) {
 826                                 netdev_dbg(ieee->dev, "A-MSDU parse error!! pRfd->nTotalSubframe : %d\n",
 827                                            rxb->nr_subframes);
 828                                 netdev_dbg(ieee->dev, "A-MSDU parse error!! Subframe Length: %d\n", nSubframe_Length);
 829                                 netdev_dbg(ieee->dev, "nRemain_Length is %d and nSubframe_Length is : %d\n", skb->len, nSubframe_Length);
 830                                 netdev_dbg(ieee->dev, "The Packet SeqNum is %d\n", SeqNum);
 831                                 return 0;
 832                         }
 833
 834                         /* move the data point to data content */
 835                         skb_pull(skb, ETHERNET_HEADER_SIZE);
 836
 837 #ifdef JOHN_NOCPY
 838                         sub_skb = skb_clone(skb, GFP_ATOMIC);
 839                         sub_skb->len = nSubframe_Length;
 840                         sub_skb->tail = sub_skb->data + nSubframe_Length;
 841 #else
 842                         /* Allocate new skb for releasing to upper layer */
 843                         sub_skb = dev_alloc_skb(nSubframe_Length + 12);
 844                         if (!sub_skb)
 845                                 return 0;
 846                         skb_reserve(sub_skb, 12);
 847                         skb_put_data(sub_skb, skb->data, nSubframe_Length);
 848 #endif
 849                         rxb->subframes[rxb->nr_subframes++] = sub_skb;
 850                         if (rxb->nr_subframes >= MAX_SUBFRAME_COUNT) {
 851                                 IEEE80211_DEBUG_RX("ParseSubframe(): Too many Subframes! Packets dropped!\n");
 852                                 break;
 853                         }
 854                         skb_pull(skb, nSubframe_Length);
 855
 856                         if (skb->len != 0) {
 857                                 nPadding_Length = 4 - ((nSubframe_Length + ETHERNET_HEADER_SIZE) % 4);
 858                                 if (nPadding_Length == 4) {
 859                                         nPadding_Length = 0;
 860                                 }
 861
 862                                 if (skb->len < nPadding_Length) {
 863                                         return 0;
 864                                 }
 865
 866                                 skb_pull(skb, nPadding_Length);
 867                         }
 868                 }
 869 #ifdef JOHN_NOCPY
 870                 dev_kfree_skb(skb);
 871 #endif
 872                 //{just for debug added by david
 873                 //printk("AMSDU::rxb->nr_subframes = %d\n",rxb->nr_subframes);
 874                 //}
 875                 return rxb->nr_subframes;
 876         }
 877 }
 878
 879 /* All received frames are sent to this function. @skb contains the frame in
 880  * IEEE 802.11 format, i.e., in the format it was sent over air.
 881  * This function is called only as a tasklet (software IRQ). */
 882 int ieee80211_rx(struct ieee80211_device *ieee, struct sk_buff *skb,
 883                  struct ieee80211_rx_stats *rx_stats)
 884 {
 885         struct net_device *dev = ieee->dev;
 886         struct rtl_80211_hdr_4addr *hdr;
 887         //struct rtl_80211_hdr_3addrqos *hdr;
 888
 889         size_t hdrlen;
 890         u16 fc, type, stype, sc;
 891         struct net_device_stats *stats;
 892         unsigned int frag;
 893         //added by amy for reorder
 894         u8      TID = 0;
 895         u16     SeqNum = 0;
 896         struct rx_ts_record *pTS = NULL;
 897         //bool bIsAggregateFrame = false;
 898         //added by amy for reorder
 899 #ifdef NOT_YET
 900         struct net_device *wds = NULL;
 901         struct net_device *wds = NULL;
 902         int from_assoc_ap = 0;
 903         void *sta = NULL;
 904 #endif
 905 //      u16 qos_ctl = 0;
 906         u8 dst[ETH_ALEN];
 907         u8 src[ETH_ALEN];
 908         u8 bssid[ETH_ALEN];
 909         struct ieee80211_crypt_data *crypt = NULL;
 910         int keyidx = 0;
 911
 912         int i;
 913         struct ieee80211_rxb *rxb = NULL;
 914         // cheat the hdr type
 915         hdr = (struct rtl_80211_hdr_4addr *)skb->data;
 916         stats = &ieee->stats;
 917
 918         if (skb->len < 10) {
 919                 netdev_info(dev, "SKB length < 10\n");
 920                 goto rx_dropped;
 921         }
 922
 923         fc = le16_to_cpu(hdr->frame_ctl);
 924         type = WLAN_FC_GET_TYPE(fc);
 925         stype = WLAN_FC_GET_STYPE(fc);
 926         sc = le16_to_cpu(hdr->seq_ctl);
 927
 928         frag = WLAN_GET_SEQ_FRAG(sc);
 929         hdrlen = ieee80211_get_hdrlen(fc);
 930
 931         if (HTCCheck(ieee, skb->data)) {
 932                 if (net_ratelimit())
 933                         netdev_warn(dev, "find HTCControl\n");
 934                 hdrlen += 4;
 935                 rx_stats->bContainHTC = true;
 936         }
 937
 938         //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
 939 #ifdef NOT_YET
 940         /* Put this code here so that we avoid duplicating it in all
 941          * Rx paths. - Jean II */
 942 #ifdef IW_WIRELESS_SPY          /* defined in iw_handler.h */
 943         /* If spy monitoring on */
 944         if (iface->spy_data.spy_number > 0) {
 945                 struct iw_quality wstats;
 946                 wstats.level = rx_stats->rssi;
 947                 wstats.noise = rx_stats->noise;
 948                 wstats.updated = 6;     /* No qual value */
 949                 /* Update spy records */
 950                 wireless_spy_update(dev, hdr->addr2, &wstats);
 951         }
 952 #endif /* IW_WIRELESS_SPY */
 953         hostap_update_rx_stats(local->ap, hdr, rx_stats);
 954 #endif
 955
 956         if (ieee->iw_mode == IW_MODE_MONITOR) {
 957                 unsigned int len = skb->len;
 958
 959                 ieee80211_monitor_rx(ieee, skb, rx_stats);
 960                 stats->rx_packets++;
 961                 stats->rx_bytes += len;
 962                 return 1;
 963         }
 964
 965         if (ieee->host_decrypt) {
 966                 int idx = 0;
 967                 if (skb->len >= hdrlen + 3)
 968                         idx = skb->data[hdrlen + 3] >> 6;
 969                 crypt = ieee->crypt[idx];
 970 #ifdef NOT_YET
 971                 sta = NULL;
 972
 973                 /* Use station specific key to override default keys if the
 974                  * receiver address is a unicast address ("individual RA"). If
 975                  * bcrx_sta_key parameter is set, station specific key is used
 976                  * even with broad/multicast targets (this is against IEEE
 977                  * 802.11, but makes it easier to use different keys with
 978                  * stations that do not support WEP key mapping). */
 979
 980                 if (!(hdr->addr1[0] & 0x01) || local->bcrx_sta_key)
 981                         (void)hostap_handle_sta_crypto(local, hdr, &crypt,
 982                                                         &sta);
 983 #endif
 984
 985                 /* allow NULL decrypt to indicate an station specific override
 986                  * for default encryption */
 987                 if (crypt && (!crypt->ops || !crypt->ops->decrypt_mpdu))
 988                         crypt = NULL;
 989
 990                 if (!crypt && (fc & IEEE80211_FCTL_WEP)) {
 991                         /* This seems to be triggered by some (multicast?)
 992                          * frames from other than current BSS, so just drop the
 993                          * frames silently instead of filling system log with
 994                          * these reports. */
 995                         IEEE80211_DEBUG_DROP("Decryption failed (not set)"
 996                                              " (SA=%pM)\n",
 997                                              hdr->addr2);
 998                         ieee->ieee_stats.rx_discards_undecryptable++;
 999                         goto rx_dropped;
1000                 }
1001         }
1002
1003         if (skb->len < IEEE80211_DATA_HDR3_LEN)
1004                 goto rx_dropped;
1005
1006         // if QoS enabled, should check the sequence for each of the AC
1007         if ((!ieee->pHTInfo->bCurRxReorderEnable) || !ieee->current_network.qos_data.active || !IsDataFrame(skb->data) || IsLegacyDataFrame(skb->data)) {
1008                 if (is_duplicate_packet(ieee, hdr))
1009                         goto rx_dropped;
1010
1011         } else {
1012                 struct rx_ts_record *pRxTS = NULL;
1013                         //IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): QOS ENABLE AND RECEIVE QOS DATA , we will get Ts, tid:%d\n",__func__, tid);
1014                 if (GetTs(
1015                                 ieee,
1016                                 (struct ts_common_info **)&pRxTS,
1017                                 hdr->addr2,
1018                                 Frame_QoSTID((u8 *)(skb->data)),
1019                                 RX_DIR,
1020                                 true)) {
1021
1022                 //      IEEE80211_DEBUG(IEEE80211_DL_REORDER,"%s(): pRxTS->rx_last_frag_num is %d,frag is %d,pRxTS->rx_last_seq_num is %d,seq is %d\n",__func__,pRxTS->rx_last_frag_num,frag,pRxTS->rx_last_seq_num,WLAN_GET_SEQ_SEQ(sc));
1023                         if ((fc & (1 << 11)) &&
1024                             (frag == pRxTS->rx_last_frag_num) &&
1025                             (WLAN_GET_SEQ_SEQ(sc) == pRxTS->rx_last_seq_num)) {
1026                                 goto rx_dropped;
1027                         } else {
1028                                 pRxTS->rx_last_frag_num = frag;
1029                                 pRxTS->rx_last_seq_num = WLAN_GET_SEQ_SEQ(sc);
1030                         }
1031                 } else {
1032                         IEEE80211_DEBUG(IEEE80211_DL_ERR, "%s(): No TS!! Skip the check!!\n", __func__);
1033                         goto rx_dropped;
1034                 }
1035         }
1036         if (type == IEEE80211_FTYPE_MGMT) {
1037
1038
1039         //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
1040                 if (ieee80211_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
1041                         goto rx_dropped;
1042                 else
1043                         goto rx_exit;
1044         }
1045
1046         /* Data frame - extract src/dst addresses */
1047         switch (fc & (IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS)) {
1048         case IEEE80211_FCTL_FROMDS:
1049                 memcpy(dst, hdr->addr1, ETH_ALEN);
1050                 memcpy(src, hdr->addr3, ETH_ALEN);
1051                 memcpy(bssid, hdr->addr2, ETH_ALEN);
1052                 break;
1053         case IEEE80211_FCTL_TODS:
1054                 memcpy(dst, hdr->addr3, ETH_ALEN);
1055                 memcpy(src, hdr->addr2, ETH_ALEN);
1056                 memcpy(bssid, hdr->addr1, ETH_ALEN);
1057                 break;
1058         case IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS:
1059                 if (skb->len < IEEE80211_DATA_HDR4_LEN)
1060                         goto rx_dropped;
1061                 memcpy(dst, hdr->addr3, ETH_ALEN);
1062                 memcpy(src, hdr->addr4, ETH_ALEN);
1063                 memcpy(bssid, ieee->current_network.bssid, ETH_ALEN);
1064                 break;
1065         default:
1066                 memcpy(dst, hdr->addr1, ETH_ALEN);
1067                 memcpy(src, hdr->addr2, ETH_ALEN);
1068                 memcpy(bssid, hdr->addr3, ETH_ALEN);
1069                 break;
1070         }
1071
1072 #ifdef NOT_YET
1073         if (hostap_rx_frame_wds(ieee, hdr, fc, &wds))
1074                 goto rx_dropped;
1075         if (wds) {
1076                 skb->dev = dev = wds;
1077                 stats = hostap_get_stats(dev);
1078         }
1079
1080         if (ieee->iw_mode == IW_MODE_MASTER && !wds &&
1081             (fc & (IEEE80211_FCTL_TODS | IEEE80211_FCTL_FROMDS)) == IEEE80211_FCTL_FROMDS &&
1082             ieee->stadev &&
1083             memcmp(hdr->addr2, ieee->assoc_ap_addr, ETH_ALEN) == 0) {
1084                 /* Frame from BSSID of the AP for which we are a client */
1085                 skb->dev = dev = ieee->stadev;
1086                 stats = hostap_get_stats(dev);
1087                 from_assoc_ap = 1;
1088         }
1089
1090         if ((ieee->iw_mode == IW_MODE_MASTER ||
1091              ieee->iw_mode == IW_MODE_REPEAT) &&
1092             !from_assoc_ap) {
1093                 switch (hostap_handle_sta_rx(ieee, dev, skb, rx_stats,
1094                                              wds)) {
1095                 case AP_RX_CONTINUE_NOT_AUTHORIZED:
1096                 case AP_RX_CONTINUE:
1097                         break;
1098                 case AP_RX_DROP:
1099                         goto rx_dropped;
1100                 case AP_RX_EXIT:
1101                         goto rx_exit;
1102                 }
1103         }
1104 #endif
1105         //IEEE80211_DEBUG_DATA(IEEE80211_DL_DATA, skb->data, skb->len);
1106         /* Nullfunc frames may have PS-bit set, so they must be passed to
1107          * hostap_handle_sta_rx() before being dropped here. */
1108         if (stype != IEEE80211_STYPE_DATA &&
1109             stype != IEEE80211_STYPE_DATA_CFACK &&
1110             stype != IEEE80211_STYPE_DATA_CFPOLL &&
1111             stype != IEEE80211_STYPE_DATA_CFACKPOLL &&
1112             stype != IEEE80211_STYPE_QOS_DATA//add by David,2006.8.4
1113             ) {
1114                 if (stype != IEEE80211_STYPE_NULLFUNC)
1115                         IEEE80211_DEBUG_DROP(
1116                                 "RX: dropped data frame "
1117                                 "with no data (type=0x%02x, "
1118                                 "subtype=0x%02x, len=%d)\n",
1119                                 type, stype, skb->len);
1120                 goto rx_dropped;
1121         }
1122         if (memcmp(bssid, ieee->current_network.bssid, ETH_ALEN))
1123                 goto rx_dropped;
1124
1125         /* skb: hdr + (possibly fragmented, possibly encrypted) payload */
1126
1127         if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
1128             (keyidx = ieee80211_rx_frame_decrypt(ieee, skb, crypt)) < 0) {
1129                 netdev_dbg(ieee->dev, "decrypt frame error\n");
1130                 goto rx_dropped;
1131         }
1132
1133
1134         hdr = (struct rtl_80211_hdr_4addr *)skb->data;
1135
1136         /* skb: hdr + (possibly fragmented) plaintext payload */
1137         // PR: FIXME: hostap has additional conditions in the "if" below:
1138         // ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
1139         if ((frag != 0 || (fc & IEEE80211_FCTL_MOREFRAGS))) {
1140                 int flen;
1141                 struct sk_buff *frag_skb = ieee80211_frag_cache_get(ieee, hdr);
1142                 IEEE80211_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
1143
1144                 if (!frag_skb) {
1145                         IEEE80211_DEBUG(IEEE80211_DL_RX | IEEE80211_DL_FRAG,
1146                                         "Rx cannot get skb from fragment "
1147                                         "cache (morefrag=%d seq=%u frag=%u)\n",
1148                                         (fc & IEEE80211_FCTL_MOREFRAGS) != 0,
1149                                         WLAN_GET_SEQ_SEQ(sc), frag);
1150                         goto rx_dropped;
1151                 }
1152                 flen = skb->len;
1153                 if (frag != 0)
1154                         flen -= hdrlen;
1155
1156                 if (frag_skb->tail + flen > frag_skb->end) {
1157                         netdev_warn(dev, "host decrypted and "
1158                                "reassembled frame did not fit skb\n");
1159                         ieee80211_frag_cache_invalidate(ieee, hdr);
1160                         goto rx_dropped;
1161                 }
1162
1163                 if (frag == 0) {
1164                         /* copy first fragment (including full headers) into
1165                          * beginning of the fragment cache skb */
1166                         skb_put_data(frag_skb, skb->data, flen);
1167                 } else {
1168                         /* append frame payload to the end of the fragment
1169                          * cache skb */
1170                         skb_put_data(frag_skb, skb->data + hdrlen, flen);
1171                 }
1172                 dev_kfree_skb_any(skb);
1173                 skb = NULL;
1174
1175                 if (fc & IEEE80211_FCTL_MOREFRAGS) {
1176                         /* more fragments expected - leave the skb in fragment
1177                          * cache for now; it will be delivered to upper layers
1178                          * after all fragments have been received */
1179                         goto rx_exit;
1180                 }
1181
1182                 /* this was the last fragment and the frame will be
1183                  * delivered, so remove skb from fragment cache */
1184                 skb = frag_skb;
1185                 hdr = (struct rtl_80211_hdr_4addr *)skb->data;
1186                 ieee80211_frag_cache_invalidate(ieee, hdr);
1187         }
1188
1189         /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
1190          * encrypted/authenticated */
1191         if (ieee->host_decrypt && (fc & IEEE80211_FCTL_WEP) &&
1192             ieee80211_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt)) {
1193                 netdev_dbg(ieee->dev, "==>decrypt msdu error\n");
1194                 goto rx_dropped;
1195         }
1196
1197         //added by amy for AP roaming
1198         ieee->LinkDetectInfo.NumRecvDataInPeriod++;
1199         ieee->LinkDetectInfo.NumRxOkInPeriod++;
1200
1201         hdr = (struct rtl_80211_hdr_4addr *)skb->data;
1202         if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep) {
1203                 if (/*ieee->ieee802_1x &&*/
1204                     ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1205
1206 #ifdef CONFIG_IEEE80211_DEBUG
1207                         /* pass unencrypted EAPOL frames even if encryption is
1208                          * configured */
1209                         struct eapol *eap = (struct eapol *)(skb->data +
1210                                 24);
1211                         IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1212                                                 eap_get_type(eap->type));
1213 #endif
1214                 } else {
1215                         IEEE80211_DEBUG_DROP(
1216                                 "encryption configured, but RX "
1217                                 "frame not encrypted (SA=%pM)\n",
1218                                 hdr->addr2);
1219                         goto rx_dropped;
1220                 }
1221         }
1222
1223 #ifdef CONFIG_IEEE80211_DEBUG
1224         if (crypt && !(fc & IEEE80211_FCTL_WEP) &&
1225             ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1226                 struct eapol *eap = (struct eapol *)(skb->data +
1227                         24);
1228                 IEEE80211_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1229                                         eap_get_type(eap->type));
1230         }
1231 #endif
1232
1233         if (crypt && !(fc & IEEE80211_FCTL_WEP) && !ieee->open_wep &&
1234             !ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1235                 IEEE80211_DEBUG_DROP(
1236                         "dropped unencrypted RX data "
1237                         "frame from %pM"
1238                         " (drop_unencrypted=1)\n",
1239                         hdr->addr2);
1240                 goto rx_dropped;
1241         }
1242 /*
1243         if(ieee80211_is_eapol_frame(ieee, skb, hdrlen)) {
1244                 printk(KERN_WARNING "RX: IEEE802.1X EPAOL frame!\n");
1245         }
1246 */
1247 //added by amy for reorder
1248         if (ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data)
1249                 && !is_multicast_ether_addr(hdr->addr1)) {
1250                 TID = Frame_QoSTID(skb->data);
1251                 SeqNum = WLAN_GET_SEQ_SEQ(sc);
1252                 GetTs(ieee, (struct ts_common_info **)&pTS, hdr->addr2, TID, RX_DIR, true);
1253                 if (TID != 0 && TID != 3) {
1254                         ieee->bis_any_nonbepkts = true;
1255                 }
1256         }
1257 //added by amy for reorder
1258         /* skb: hdr + (possible reassembled) full plaintext payload */
1259         //ethertype = (payload[6] << 8) | payload[7];
1260         rxb = kmalloc(sizeof(struct ieee80211_rxb), GFP_ATOMIC);
1261         if (!rxb)
1262                 goto rx_dropped;
1263         /* to parse amsdu packets */
1264         /* qos data packets & reserved bit is 1 */
1265         if (parse_subframe(ieee, skb, rx_stats, rxb, src, dst) == 0) {
1266                 /* only to free rxb, and not submit the packets to upper layer */
1267                 for (i = 0; i < rxb->nr_subframes; i++) {
1268                         dev_kfree_skb(rxb->subframes[i]);
1269                 }
1270                 kfree(rxb);
1271                 rxb = NULL;
1272                 goto rx_dropped;
1273         }
1274
1275 //added by amy for reorder
1276         if (!ieee->pHTInfo->bCurRxReorderEnable || !pTS) {
1277                 indicate_packets(ieee, rxb);
1278                 kfree(rxb);
1279                 rxb = NULL;
1280
1281         } else {
1282                 IEEE80211_DEBUG(IEEE80211_DL_REORDER, "%s(): REORDER ENABLE AND PTS not NULL, and we will enter RxReorderIndicatePacket()\n", __func__);
1283                 RxReorderIndicatePacket(ieee, rxb, pTS, SeqNum);
1284         }
1285 #ifndef JOHN_NOCPY
1286         dev_kfree_skb(skb);
1287 #endif
1288
1289  rx_exit:
1290 #ifdef NOT_YET
1291         if (sta)
1292                 hostap_handle_sta_release(sta);
1293 #endif
1294         return 1;
1295
1296  rx_dropped:
1297         kfree(rxb);
1298         rxb = NULL;
1299         stats->rx_dropped++;
1300
1301         /* Returning 0 indicates to caller that we have not handled the SKB--
1302          * so it is still allocated and can be used again by underlying
1303          * hardware as a DMA target */
1304         return 0;
1305 }
1306 EXPORT_SYMBOL(ieee80211_rx);
1307
1308 #define MGMT_FRAME_FIXED_PART_LENGTH            0x24
1309
1310 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
1311
1312 /*
1313 * Make the structure we read from the beacon packet to have
1314 * the right values
1315 */
1316 static int ieee80211_verify_qos_info(struct ieee80211_qos_information_element
1317                                      *info_element, int sub_type)
1318 {
1319
1320         if (info_element->qui_subtype != sub_type)
1321                 return -1;
1322         if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
1323                 return -1;
1324         if (info_element->qui_type != QOS_OUI_TYPE)
1325                 return -1;
1326         if (info_element->version != QOS_VERSION_1)
1327                 return -1;
1328
1329         return 0;
1330 }
1331
1332
1333 /*
1334  * Parse a QoS parameter element
1335  */
1336 static int ieee80211_read_qos_param_element(struct ieee80211_qos_parameter_info
1337                                             *element_param, struct ieee80211_info_element
1338                                             *info_element)
1339 {
1340         int ret = 0;
1341         u16 size = sizeof(struct ieee80211_qos_parameter_info) - 2;
1342
1343         if (!info_element || !element_param)
1344                 return -1;
1345
1346         if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
1347                 memcpy(element_param->info_element.qui, info_element->data,
1348                        info_element->len);
1349                 element_param->info_element.elementID = info_element->id;
1350                 element_param->info_element.length = info_element->len;
1351         } else
1352                 ret = -1;
1353         if (ret == 0)
1354                 ret = ieee80211_verify_qos_info(&element_param->info_element,
1355                                                 QOS_OUI_PARAM_SUB_TYPE);
1356         return ret;
1357 }
1358
1359 /*
1360  * Parse a QoS information element
1361  */
1362 static int ieee80211_read_qos_info_element(
1363                 struct ieee80211_qos_information_element *element_info,
1364                 struct ieee80211_info_element *info_element)
1365 {
1366         int ret = 0;
1367         u16 size = sizeof(struct ieee80211_qos_information_element) - 2;
1368
1369         if (!element_info)
1370                 return -1;
1371         if (!info_element)
1372                 return -1;
1373
1374         if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
1375                 memcpy(element_info->qui, info_element->data,
1376                        info_element->len);
1377                 element_info->elementID = info_element->id;
1378                 element_info->length = info_element->len;
1379         } else
1380                 ret = -1;
1381
1382         if (ret == 0)
1383                 ret = ieee80211_verify_qos_info(element_info,
1384                                                 QOS_OUI_INFO_SUB_TYPE);
1385         return ret;
1386 }
1387
1388
1389 /*
1390  * Write QoS parameters from the ac parameters.
1391  */
1392 static int ieee80211_qos_convert_ac_to_parameters(
1393                 struct ieee80211_qos_parameter_info *param_elm,
1394                 struct ieee80211_qos_parameters *qos_param)
1395 {
1396         int i;
1397         struct ieee80211_qos_ac_parameter *ac_params;
1398         u8 aci;
1399         //u8 cw_min;
1400         //u8 cw_max;
1401
1402         for (i = 0; i < QOS_QUEUE_NUM; i++) {
1403                 ac_params = &(param_elm->ac_params_record[i]);
1404
1405                 aci = (ac_params->aci_aifsn & 0x60) >> 5;
1406
1407                 if (aci >= QOS_QUEUE_NUM)
1408                         continue;
1409                 qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f;
1410
1411                 /* WMM spec P.11: The minimum value for AIFSN shall be 2 */
1412                 qos_param->aifs[aci] = (qos_param->aifs[aci] < 2) ? 2 : qos_param->aifs[aci];
1413
1414                 qos_param->cw_min[aci] =
1415                     cpu_to_le16(ac_params->ecw_min_max & 0x0F);
1416
1417                 qos_param->cw_max[aci] =
1418                     cpu_to_le16((ac_params->ecw_min_max & 0xF0) >> 4);
1419
1420                 qos_param->flag[aci] =
1421                     (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1422                 qos_param->tx_op_limit[aci] = ac_params->tx_op_limit;
1423         }
1424         return 0;
1425 }
1426
1427 /*
1428  * we have a generic data element which it may contain QoS information or
1429  * parameters element. check the information element length to decide
1430  * which type to read
1431  */
1432 static int ieee80211_parse_qos_info_param_IE(struct ieee80211_info_element
1433                                              *info_element,
1434                                              struct ieee80211_network *network)
1435 {
1436         int rc = 0;
1437         struct ieee80211_qos_parameters *qos_param = NULL;
1438         struct ieee80211_qos_information_element qos_info_element;
1439
1440         rc = ieee80211_read_qos_info_element(&qos_info_element, info_element);
1441
1442         if (rc == 0) {
1443                 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1444                 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1445         } else {
1446                 struct ieee80211_qos_parameter_info param_element;
1447
1448                 rc = ieee80211_read_qos_param_element(&param_element,
1449                                                       info_element);
1450                 if (rc == 0) {
1451                         qos_param = &(network->qos_data.parameters);
1452                         ieee80211_qos_convert_ac_to_parameters(&param_element,
1453                                                                qos_param);
1454                         network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1455                         network->qos_data.param_count =
1456                             param_element.info_element.ac_info & 0x0F;
1457                 }
1458         }
1459
1460         if (rc == 0) {
1461                 IEEE80211_DEBUG_QOS("QoS is supported\n");
1462                 network->qos_data.supported = 1;
1463         }
1464         return rc;
1465 }
1466
1467 #ifdef CONFIG_IEEE80211_DEBUG
1468 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
1469
1470 static const char *get_info_element_string(u16 id)
1471 {
1472         switch (id) {
1473                 MFIE_STRING(SSID);
1474                 MFIE_STRING(RATES);
1475                 MFIE_STRING(FH_SET);
1476                 MFIE_STRING(DS_SET);
1477                 MFIE_STRING(CF_SET);
1478                 MFIE_STRING(TIM);
1479                 MFIE_STRING(IBSS_SET);
1480                 MFIE_STRING(COUNTRY);
1481                 MFIE_STRING(HOP_PARAMS);
1482                 MFIE_STRING(HOP_TABLE);
1483                 MFIE_STRING(REQUEST);
1484                 MFIE_STRING(CHALLENGE);
1485                 MFIE_STRING(POWER_CONSTRAINT);
1486                 MFIE_STRING(POWER_CAPABILITY);
1487                 MFIE_STRING(TPC_REQUEST);
1488                 MFIE_STRING(TPC_REPORT);
1489                 MFIE_STRING(SUPP_CHANNELS);
1490                 MFIE_STRING(CSA);
1491                 MFIE_STRING(MEASURE_REQUEST);
1492                 MFIE_STRING(MEASURE_REPORT);
1493                 MFIE_STRING(QUIET);
1494                 MFIE_STRING(IBSS_DFS);
1495                // MFIE_STRING(ERP_INFO);
1496                 MFIE_STRING(RSN);
1497                 MFIE_STRING(RATES_EX);
1498                 MFIE_STRING(GENERIC);
1499                 MFIE_STRING(QOS_PARAMETER);
1500         default:
1501                 return "UNKNOWN";
1502         }
1503 }
1504 #endif
1505
1506 static inline void ieee80211_extract_country_ie(
1507         struct ieee80211_device *ieee,
1508         struct ieee80211_info_element *info_element,
1509         struct ieee80211_network *network,
1510         u8 *addr2
1511 )
1512 {
1513         if (IS_DOT11D_ENABLE(ieee)) {
1514                 if (info_element->len != 0) {
1515                         memcpy(network->CountryIeBuf, info_element->data, info_element->len);
1516                         network->CountryIeLen = info_element->len;
1517
1518                         if (!IS_COUNTRY_IE_VALID(ieee)) {
1519                                 dot11d_update_country_ie(ieee, addr2, info_element->len, info_element->data);
1520                         }
1521                 }
1522
1523                 //
1524                 // 070305, rcnjko: I update country IE watch dog here because
1525                 // some AP (e.g. Cisco 1242) don't include country IE in their
1526                 // probe response frame.
1527                 //
1528                 if (IS_EQUAL_CIE_SRC(ieee, addr2)) {
1529                         UPDATE_CIE_WATCHDOG(ieee);
1530                 }
1531         }
1532
1533 }
1534
1535 int ieee80211_parse_info_param(struct ieee80211_device *ieee,
1536                 struct ieee80211_info_element *info_element,
1537                 u16 length,
1538                 struct ieee80211_network *network,
1539                 struct ieee80211_rx_stats *stats)
1540 {
1541         u8 i;
1542         short offset;
1543         u16     tmp_htcap_len = 0;
1544         u16     tmp_htinfo_len = 0;
1545         u16 ht_realtek_agg_len = 0;
1546         u8  ht_realtek_agg_buf[MAX_IE_LEN];
1547 //      u16 broadcom_len = 0;
1548 #ifdef CONFIG_IEEE80211_DEBUG
1549         char rates_str[64];
1550         char *p;
1551 #endif
1552
1553         while (length >= sizeof(*info_element)) {
1554                 if (sizeof(*info_element) + info_element->len > length) {
1555                         IEEE80211_DEBUG_MGMT("Info elem: parse failed: "
1556                                              "info_element->len + 2 > left : "
1557                                              "info_element->len+2=%zd left=%d, id=%d.\n",
1558                                              info_element->len +
1559                                              sizeof(*info_element),
1560                                              length, info_element->id);
1561                         /* We stop processing but don't return an error here
1562                          * because some misbehaviour APs break this rule. ie.
1563                          * Orinoco AP1000. */
1564                         break;
1565                 }
1566
1567                 switch (info_element->id) {
1568                 case MFIE_TYPE_SSID:
1569                         if (ieee80211_is_empty_essid(info_element->data,
1570                                                      info_element->len)) {
1571                                 network->flags |= NETWORK_EMPTY_ESSID;
1572                                 break;
1573                         }
1574
1575                         network->ssid_len = min(info_element->len,
1576                                                 (u8)IW_ESSID_MAX_SIZE);
1577                         memcpy(network->ssid, info_element->data, network->ssid_len);
1578                         if (network->ssid_len < IW_ESSID_MAX_SIZE)
1579                                 memset(network->ssid + network->ssid_len, 0,
1580                                        IW_ESSID_MAX_SIZE - network->ssid_len);
1581
1582                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
1583                                              network->ssid, network->ssid_len);
1584                         break;
1585
1586                 case MFIE_TYPE_RATES:
1587 #ifdef CONFIG_IEEE80211_DEBUG
1588                         p = rates_str;
1589 #endif
1590                         network->rates_len = min(info_element->len,
1591                                                  MAX_RATES_LENGTH);
1592                         for (i = 0; i < network->rates_len; i++) {
1593                                 network->rates[i] = info_element->data[i];
1594 #ifdef CONFIG_IEEE80211_DEBUG
1595                                 p += scnprintf(p, sizeof(rates_str) -
1596                                               (p - rates_str), "%02X ",
1597                                               network->rates[i]);
1598 #endif
1599                                 if (ieee80211_is_ofdm_rate
1600                                     (info_element->data[i])) {
1601                                         network->flags |= NETWORK_HAS_OFDM;
1602                                         if (info_element->data[i] &
1603                                             IEEE80211_BASIC_RATE_MASK)
1604                                                 network->flags &=
1605                                                     ~NETWORK_HAS_CCK;
1606                                 }
1607                         }
1608
1609                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
1610                                              rates_str, network->rates_len);
1611                         break;
1612
1613                 case MFIE_TYPE_RATES_EX:
1614 #ifdef CONFIG_IEEE80211_DEBUG
1615                         p = rates_str;
1616 #endif
1617                         network->rates_ex_len = min(info_element->len,
1618                                                     MAX_RATES_EX_LENGTH);
1619                         for (i = 0; i < network->rates_ex_len; i++) {
1620                                 network->rates_ex[i] = info_element->data[i];
1621 #ifdef CONFIG_IEEE80211_DEBUG
1622                                 p += scnprintf(p, sizeof(rates_str) -
1623                                               (p - rates_str), "%02X ",
1624                                               network->rates_ex[i]);
1625 #endif
1626                                 if (ieee80211_is_ofdm_rate
1627                                     (info_element->data[i])) {
1628                                         network->flags |= NETWORK_HAS_OFDM;
1629                                         if (info_element->data[i] &
1630                                             IEEE80211_BASIC_RATE_MASK)
1631                                                 network->flags &=
1632                                                     ~NETWORK_HAS_CCK;
1633                                 }
1634                         }
1635
1636                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1637                                              rates_str, network->rates_ex_len);
1638                         break;
1639
1640                 case MFIE_TYPE_DS_SET:
1641                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
1642                                              info_element->data[0]);
1643                         network->channel = info_element->data[0];
1644                         break;
1645
1646                 case MFIE_TYPE_FH_SET:
1647                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
1648                         break;
1649
1650                 case MFIE_TYPE_CF_SET:
1651                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
1652                         break;
1653
1654                 case MFIE_TYPE_TIM:
1655                         if (info_element->len < 4)
1656                                 break;
1657
1658                         network->tim.tim_count = info_element->data[0];
1659                         network->tim.tim_period = info_element->data[1];
1660
1661                         network->dtim_period = info_element->data[1];
1662                         if (ieee->state != IEEE80211_LINKED)
1663                                 break;
1664
1665                         network->last_dtim_sta_time[0] = stats->mac_time[0];
1666                         network->last_dtim_sta_time[1] = stats->mac_time[1];
1667
1668                         network->dtim_data = IEEE80211_DTIM_VALID;
1669
1670                         if (info_element->data[0] != 0)
1671                                 break;
1672
1673                         if (info_element->data[2] & 1)
1674                                 network->dtim_data |= IEEE80211_DTIM_MBCAST;
1675
1676                         offset = (info_element->data[2] >> 1) * 2;
1677
1678                         if (ieee->assoc_id < 8 * offset ||
1679                                 ieee->assoc_id > 8 * (offset + info_element->len - 3))
1680
1681                                 break;
1682
1683                         offset = (ieee->assoc_id / 8) - offset;// + ((aid % 8)? 0 : 1) ;
1684
1685                         if (info_element->data[3 + offset] & (1 << (ieee->assoc_id % 8)))
1686                                 network->dtim_data |= IEEE80211_DTIM_UCAST;
1687
1688                         //IEEE80211_DEBUG_MGMT("MFIE_TYPE_TIM: partially ignored\n");
1689                         break;
1690
1691                 case MFIE_TYPE_ERP:
1692                         network->erp_value = info_element->data[0];
1693                         network->flags |= NETWORK_HAS_ERP_VALUE;
1694                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1695                                              network->erp_value);
1696                         break;
1697                 case MFIE_TYPE_IBSS_SET:
1698                         network->atim_window = info_element->data[0];
1699                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
1700                                              network->atim_window);
1701                         break;
1702
1703                 case MFIE_TYPE_CHALLENGE:
1704                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
1705                         break;
1706
1707                 case MFIE_TYPE_GENERIC:
1708                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
1709                                              info_element->len);
1710                         if (!ieee80211_parse_qos_info_param_IE(info_element,
1711                                                                network))
1712                                 break;
1713
1714                         if (info_element->len >= 4 &&
1715                             info_element->data[0] == 0x00 &&
1716                             info_element->data[1] == 0x50 &&
1717                             info_element->data[2] == 0xf2 &&
1718                             info_element->data[3] == 0x01) {
1719                                 network->wpa_ie_len = min(info_element->len + 2,
1720                                                           MAX_WPA_IE_LEN);
1721                                 memcpy(network->wpa_ie, info_element,
1722                                        network->wpa_ie_len);
1723                                 break;
1724                         }
1725
1726 #ifdef THOMAS_TURBO
1727                         if (info_element->len == 7 &&
1728                             info_element->data[0] == 0x00 &&
1729                             info_element->data[1] == 0xe0 &&
1730                             info_element->data[2] == 0x4c &&
1731                             info_element->data[3] == 0x01 &&
1732                             info_element->data[4] == 0x02) {
1733                                 network->Turbo_Enable = 1;
1734                         }
1735 #endif
1736
1737                         //for HTcap and HTinfo parameters
1738                         if (tmp_htcap_len == 0) {
1739                                 if (info_element->len >= 4 &&
1740                                    info_element->data[0] == 0x00 &&
1741                                    info_element->data[1] == 0x90 &&
1742                                    info_element->data[2] == 0x4c &&
1743                                    info_element->data[3] == 0x033){
1744
1745                                         tmp_htcap_len = min(info_element->len, (u8)MAX_IE_LEN);
1746                                         if (tmp_htcap_len != 0) {
1747                                                 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1748                                                 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf) ? \
1749                                                         sizeof(network->bssht.bdHTCapBuf) : tmp_htcap_len;
1750                                                 memcpy(network->bssht.bdHTCapBuf, info_element->data, network->bssht.bdHTCapLen);
1751                                         }
1752                                 }
1753                                 if (tmp_htcap_len != 0)
1754                                         network->bssht.bdSupportHT = true;
1755                                 else
1756                                         network->bssht.bdSupportHT = false;
1757                         }
1758
1759
1760                         if (tmp_htinfo_len == 0) {
1761                                 if (info_element->len >= 4 &&
1762                                         info_element->data[0] == 0x00 &&
1763                                         info_element->data[1] == 0x90 &&
1764                                         info_element->data[2] == 0x4c &&
1765                                         info_element->data[3] == 0x034){
1766
1767                                         tmp_htinfo_len = min(info_element->len, (u8)MAX_IE_LEN);
1768                                         if (tmp_htinfo_len != 0) {
1769                                                 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1770                                                 if (tmp_htinfo_len) {
1771                                                         network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf) ? \
1772                                                                 sizeof(network->bssht.bdHTInfoBuf) : tmp_htinfo_len;
1773                                                         memcpy(network->bssht.bdHTInfoBuf, info_element->data, network->bssht.bdHTInfoLen);
1774                                                 }
1775
1776                                         }
1777
1778                                 }
1779                         }
1780
1781                         if (ieee->aggregation) {
1782                                 if (network->bssht.bdSupportHT) {
1783                                         if (info_element->len >= 4 &&
1784                                                 info_element->data[0] == 0x00 &&
1785                                                 info_element->data[1] == 0xe0 &&
1786                                                 info_element->data[2] == 0x4c &&
1787                                                 info_element->data[3] == 0x02){
1788
1789                                                 ht_realtek_agg_len = min(info_element->len, (u8)MAX_IE_LEN);
1790                                                 memcpy(ht_realtek_agg_buf, info_element->data, info_element->len);
1791
1792                                         }
1793                                         if (ht_realtek_agg_len >= 5) {
1794                                                 network->bssht.bdRT2RTAggregation = true;
1795
1796                                                 if ((ht_realtek_agg_buf[4] == 1) && (ht_realtek_agg_buf[5] & 0x02))
1797                                                         network->bssht.bdRT2RTLongSlotTime = true;
1798                                         }
1799                                 }
1800
1801                         }
1802
1803                         //if(tmp_htcap_len !=0  ||  tmp_htinfo_len != 0)
1804                         {
1805                                 if ((info_element->len >= 3 &&
1806                                          info_element->data[0] == 0x00 &&
1807                                          info_element->data[1] == 0x05 &&
1808                                          info_element->data[2] == 0xb5) ||
1809                                          (info_element->len >= 3 &&
1810                                          info_element->data[0] == 0x00 &&
1811                                          info_element->data[1] == 0x0a &&
1812                                          info_element->data[2] == 0xf7) ||
1813                                          (info_element->len >= 3 &&
1814                                          info_element->data[0] == 0x00 &&
1815                                          info_element->data[1] == 0x10 &&
1816                                          info_element->data[2] == 0x18)){
1817
1818                                         network->broadcom_cap_exist = true;
1819
1820                                 }
1821                         }
1822                         if (info_element->len >= 3 &&
1823                                 info_element->data[0] == 0x00 &&
1824                                 info_element->data[1] == 0x0c &&
1825                                 info_element->data[2] == 0x43) {
1826                                 network->ralink_cap_exist = true;
1827                         } else
1828                                 network->ralink_cap_exist = false;
1829                         //added by amy for atheros AP
1830                         if ((info_element->len >= 3 &&
1831                                 info_element->data[0] == 0x00 &&
1832                                 info_element->data[1] == 0x03 &&
1833                                 info_element->data[2] == 0x7f) ||
1834                                 (info_element->len >= 3 &&
1835                                 info_element->data[0] == 0x00 &&
1836                                 info_element->data[1] == 0x13 &&
1837                                 info_element->data[2] == 0x74)) {
1838                                 netdev_dbg(ieee->dev, "========> athros AP is exist\n");
1839                                 network->atheros_cap_exist = true;
1840                         } else
1841                                 network->atheros_cap_exist = false;
1842
1843                         if (info_element->len >= 3 &&
1844                                 info_element->data[0] == 0x00 &&
1845                                 info_element->data[1] == 0x40 &&
1846                                 info_element->data[2] == 0x96) {
1847                                 network->cisco_cap_exist = true;
1848                         } else
1849                                 network->cisco_cap_exist = false;
1850                         //added by amy for LEAP of cisco
1851                         if (info_element->len > 4 &&
1852                                 info_element->data[0] == 0x00 &&
1853                                 info_element->data[1] == 0x40 &&
1854                                 info_element->data[2] == 0x96 &&
1855                                 info_element->data[3] == 0x01) {
1856                                 if (info_element->len == 6) {
1857                                         memcpy(network->CcxRmState, &info_element[4], 2);
1858                                         if (network->CcxRmState[0] != 0)
1859                                                 network->bCcxRmEnable = true;
1860                                         else
1861                                                 network->bCcxRmEnable = false;
1862                                         //
1863                                         // CCXv4 Table 59-1 MBSSID Masks.
1864                                         //
1865                                         network->MBssidMask = network->CcxRmState[1] & 0x07;
1866                                         if (network->MBssidMask != 0) {
1867                                                 network->bMBssidValid = true;
1868                                                 network->MBssidMask = 0xff << (network->MBssidMask);
1869                                                 ether_addr_copy(network->MBssid, network->bssid);
1870                                                 network->MBssid[5] &= network->MBssidMask;
1871                                         } else {
1872                                                 network->bMBssidValid = false;
1873                                         }
1874                                 } else {
1875                                         network->bCcxRmEnable = false;
1876                                 }
1877                         }
1878                         if (info_element->len > 4  &&
1879                                 info_element->data[0] == 0x00 &&
1880                                 info_element->data[1] == 0x40 &&
1881                                 info_element->data[2] == 0x96 &&
1882                                 info_element->data[3] == 0x03) {
1883                                 if (info_element->len == 5) {
1884                                         network->bWithCcxVerNum = true;
1885                                         network->BssCcxVerNumber = info_element->data[4];
1886                                 } else {
1887                                         network->bWithCcxVerNum = false;
1888                                         network->BssCcxVerNumber = 0;
1889                                 }
1890                         }
1891                         break;
1892
1893                 case MFIE_TYPE_RSN:
1894                         IEEE80211_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
1895                                              info_element->len);
1896                         network->rsn_ie_len = min(info_element->len + 2,
1897                                                   MAX_WPA_IE_LEN);
1898                         memcpy(network->rsn_ie, info_element,
1899                                network->rsn_ie_len);
1900                         break;
1901
1902                         //HT related element.
1903                 case MFIE_TYPE_HT_CAP:
1904                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_HT_CAP: %d bytes\n",
1905                                              info_element->len);
1906                         tmp_htcap_len = min(info_element->len, (u8)MAX_IE_LEN);
1907                         if (tmp_htcap_len != 0) {
1908                                 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1909                                 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf) ? \
1910                                         sizeof(network->bssht.bdHTCapBuf) : tmp_htcap_len;
1911                                 memcpy(network->bssht.bdHTCapBuf, info_element->data, network->bssht.bdHTCapLen);
1912
1913                                 //If peer is HT, but not WMM, call QosSetLegacyWMMParamWithHT()
1914                                 // windows driver will update WMM parameters each beacon received once connected
1915                                 // Linux driver is a bit different.
1916                                 network->bssht.bdSupportHT = true;
1917                         } else
1918                                 network->bssht.bdSupportHT = false;
1919                         break;
1920
1921
1922                 case MFIE_TYPE_HT_INFO:
1923                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_HT_INFO: %d bytes\n",
1924                                              info_element->len);
1925                         tmp_htinfo_len = min(info_element->len, (u8)MAX_IE_LEN);
1926                         if (tmp_htinfo_len) {
1927                                 network->bssht.bdHTSpecVer = HT_SPEC_VER_IEEE;
1928                                 network->bssht.bdHTInfoLen = tmp_htinfo_len > sizeof(network->bssht.bdHTInfoBuf) ? \
1929                                         sizeof(network->bssht.bdHTInfoBuf) : tmp_htinfo_len;
1930                                 memcpy(network->bssht.bdHTInfoBuf, info_element->data, network->bssht.bdHTInfoLen);
1931                         }
1932                         break;
1933
1934                 case MFIE_TYPE_AIRONET:
1935                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_AIRONET: %d bytes\n",
1936                                              info_element->len);
1937                         if (info_element->len > IE_CISCO_FLAG_POSITION) {
1938                                 network->bWithAironetIE = true;
1939
1940                                 // CCX 1 spec v1.13, A01.1 CKIP Negotiation (page23):
1941                                 // "A Cisco access point advertises support for CKIP in beacon and probe response packets,
1942                                 //  by adding an Aironet element and setting one or both of the CKIP negotiation bits."
1943                                 if ((info_element->data[IE_CISCO_FLAG_POSITION] & SUPPORT_CKIP_MIC)     ||
1944                                         (info_element->data[IE_CISCO_FLAG_POSITION] & SUPPORT_CKIP_PK)) {
1945                                         network->bCkipSupported = true;
1946                                 } else {
1947                                         network->bCkipSupported = false;
1948                                 }
1949                         } else {
1950                                 network->bWithAironetIE = false;
1951                                 network->bCkipSupported = false;
1952                         }
1953                         break;
1954                 case MFIE_TYPE_QOS_PARAMETER:
1955                         netdev_err(ieee->dev,
1956                                    "QoS Error need to parse QOS_PARAMETER IE\n");
1957                         break;
1958
1959                 case MFIE_TYPE_COUNTRY:
1960                         IEEE80211_DEBUG_SCAN("MFIE_TYPE_COUNTRY: %d bytes\n",
1961                                              info_element->len);
1962                         ieee80211_extract_country_ie(ieee, info_element, network, network->bssid);//addr2 is same as addr3 when from an AP
1963                         break;
1964 /* TODO */
1965                 default:
1966                         IEEE80211_DEBUG_MGMT
1967                             ("Unsupported info element: %s (%d)\n",
1968                              get_info_element_string(info_element->id),
1969                              info_element->id);
1970                         break;
1971                 }
1972
1973                 length -= sizeof(*info_element) + info_element->len;
1974                 info_element =
1975                     (struct ieee80211_info_element *)&info_element->
1976                     data[info_element->len];
1977         }
1978
1979         if (!network->atheros_cap_exist && !network->broadcom_cap_exist &&
1980                 !network->cisco_cap_exist && !network->ralink_cap_exist && !network->bssht.bdRT2RTAggregation) {
1981                 network->unknown_cap_exist = true;
1982         } else {
1983                 network->unknown_cap_exist = false;
1984         }
1985         return 0;
1986 }
1987
1988 static inline u8 ieee80211_SignalStrengthTranslate(
1989         u8  CurrSS
1990         )
1991 {
1992         u8 RetSS;
1993
1994         // Step 1. Scale mapping.
1995         if (CurrSS >= 71 && CurrSS <= 100) {
1996                 RetSS = 90 + ((CurrSS - 70) / 3);
1997         } else if (CurrSS >= 41 && CurrSS <= 70) {
1998                 RetSS = 78 + ((CurrSS - 40) / 3);
1999         } else if (CurrSS >= 31 && CurrSS <= 40) {
2000                 RetSS = 66 + (CurrSS - 30);
2001         } else if (CurrSS >= 21 && CurrSS <= 30) {
2002                 RetSS = 54 + (CurrSS - 20);
2003         } else if (CurrSS >= 5 && CurrSS <= 20) {
2004                 RetSS = 42 + (((CurrSS - 5) * 2) / 3);
2005         } else if (CurrSS == 4) {
2006                 RetSS = 36;
2007         } else if (CurrSS == 3) {
2008                 RetSS = 27;
2009         } else if (CurrSS == 2) {
2010                 RetSS = 18;
2011         } else if (CurrSS == 1) {
2012                 RetSS = 9;
2013         } else {
2014                 RetSS = CurrSS;
2015         }
2016         //RT_TRACE(COMP_DBG, DBG_LOUD, ("##### After Mapping:  LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS));
2017
2018         // Step 2. Smoothing.
2019
2020         //RT_TRACE(COMP_DBG, DBG_LOUD, ("$$$$$ After Smoothing:  LastSS: %d, CurrSS: %d, RetSS: %d\n", LastSS, CurrSS, RetSS));
2021
2022         return RetSS;
2023 }
2024
2025 /* 0-100 index */
2026 static long ieee80211_translate_todbm(u8 signal_strength_index)
2027 {
2028         long    signal_power; // in dBm.
2029
2030         // Translate to dBm (x=0.5y-95).
2031         signal_power = (long)((signal_strength_index + 1) >> 1);
2032         signal_power -= 95;
2033
2034         return signal_power;
2035 }
2036
2037 static inline int ieee80211_network_init(
2038         struct ieee80211_device *ieee,
2039         struct ieee80211_probe_response *beacon,
2040         struct ieee80211_network *network,
2041         struct ieee80211_rx_stats *stats)
2042 {
2043 #ifdef CONFIG_IEEE80211_DEBUG
2044         //char rates_str[64];
2045         //char *p;
2046 #endif
2047
2048         network->qos_data.active = 0;
2049         network->qos_data.supported = 0;
2050         network->qos_data.param_count = 0;
2051         network->qos_data.old_param_count = 0;
2052
2053         /* Pull out fixed field data */
2054         memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
2055         network->capability = le16_to_cpu(beacon->capability);
2056         network->last_scanned = jiffies;
2057         network->time_stamp[0] = le32_to_cpu(beacon->time_stamp[0]);
2058         network->time_stamp[1] = le32_to_cpu(beacon->time_stamp[1]);
2059         network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
2060         /* Where to pull this? beacon->listen_interval;*/
2061         network->listen_interval = 0x0A;
2062         network->rates_len = network->rates_ex_len = 0;
2063         network->last_associate = 0;
2064         network->ssid_len = 0;
2065         network->flags = 0;
2066         network->atim_window = 0;
2067         network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
2068             0x3 : 0x0;
2069         network->berp_info_valid = false;
2070         network->broadcom_cap_exist = false;
2071         network->ralink_cap_exist = false;
2072         network->atheros_cap_exist = false;
2073         network->cisco_cap_exist = false;
2074         network->unknown_cap_exist = false;
2075 #ifdef THOMAS_TURBO
2076         network->Turbo_Enable = 0;
2077 #endif
2078         network->CountryIeLen = 0;
2079         memset(network->CountryIeBuf, 0, MAX_IE_LEN);
2080 //Initialize HT parameters
2081         //ieee80211_ht_initialize(&network->bssht);
2082         HTInitializeBssDesc(&network->bssht);
2083         if (stats->freq == IEEE80211_52GHZ_BAND) {
2084                 /* for A band (No DS info) */
2085                 network->channel = stats->received_channel;
2086         } else
2087                 network->flags |= NETWORK_HAS_CCK;
2088
2089         network->wpa_ie_len = 0;
2090         network->rsn_ie_len = 0;
2091
2092         if (ieee80211_parse_info_param
2093             (ieee, beacon->info_element, stats->len - sizeof(*beacon), network, stats))
2094                 return 1;
2095
2096         network->mode = 0;
2097         if (stats->freq == IEEE80211_52GHZ_BAND)
2098                 network->mode = IEEE_A;
2099         else {
2100                 if (network->flags & NETWORK_HAS_OFDM)
2101                         network->mode |= IEEE_G;
2102                 if (network->flags & NETWORK_HAS_CCK)
2103                         network->mode |= IEEE_B;
2104         }
2105
2106         if (network->mode == 0) {
2107                 IEEE80211_DEBUG_SCAN("Filtered out '%s (%pM)' "
2108                                      "network.\n",
2109                                      escape_essid(network->ssid,
2110                                                   network->ssid_len),
2111                                      network->bssid);
2112                 return 1;
2113         }
2114
2115         if (network->bssht.bdSupportHT) {
2116                 if (network->mode == IEEE_A)
2117                         network->mode = IEEE_N_5G;
2118                 else if (network->mode & (IEEE_G | IEEE_B))
2119                         network->mode = IEEE_N_24G;
2120         }
2121         if (ieee80211_is_empty_essid(network->ssid, network->ssid_len))
2122                 network->flags |= NETWORK_EMPTY_ESSID;
2123
2124         stats->signal = 30 + (stats->SignalStrength * 70) / 100;
2125         //stats->signal = ieee80211_SignalStrengthTranslate(stats->signal);
2126         stats->noise = ieee80211_translate_todbm((u8)(100 - stats->signal)) - 25;
2127
2128         memcpy(&network->stats, stats, sizeof(network->stats));
2129
2130         return 0;
2131 }
2132
2133 static inline int is_same_network(struct ieee80211_network *src,
2134                                   struct ieee80211_network *dst, struct ieee80211_device *ieee)
2135 {
2136         /* A network is only a duplicate if the channel, BSSID, ESSID
2137          * and the capability field (in particular IBSS and BSS) all match.
2138          * We treat all <hidden> with the same BSSID and channel
2139          * as one network */
2140         return //((src->ssid_len == dst->ssid_len) &&
2141                 (((src->ssid_len == dst->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) &&
2142                 (src->channel == dst->channel) &&
2143                 !memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
2144                 //!memcmp(src->ssid, dst->ssid, src->ssid_len) &&
2145                 (!memcmp(src->ssid, dst->ssid, src->ssid_len) || (ieee->iw_mode == IW_MODE_INFRA)) &&
2146                 ((src->capability & WLAN_CAPABILITY_IBSS) ==
2147                 (dst->capability & WLAN_CAPABILITY_IBSS)) &&
2148                 ((src->capability & WLAN_CAPABILITY_BSS) ==
2149                 (dst->capability & WLAN_CAPABILITY_BSS)));
2150 }
2151
2152 static inline void update_network(struct ieee80211_network *dst,
2153                                   struct ieee80211_network *src)
2154 {
2155         int qos_active;
2156         u8 old_param;
2157
2158         memcpy(&dst->stats, &src->stats, sizeof(struct ieee80211_rx_stats));
2159         dst->capability = src->capability;
2160         memcpy(dst->rates, src->rates, src->rates_len);
2161         dst->rates_len = src->rates_len;
2162         memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
2163         dst->rates_ex_len = src->rates_ex_len;
2164         if (src->ssid_len > 0) {
2165                 memset(dst->ssid, 0, dst->ssid_len);
2166                 dst->ssid_len = src->ssid_len;
2167                 memcpy(dst->ssid, src->ssid, src->ssid_len);
2168         }
2169         dst->mode = src->mode;
2170         dst->flags = src->flags;
2171         dst->time_stamp[0] = src->time_stamp[0];
2172         dst->time_stamp[1] = src->time_stamp[1];
2173         if (src->flags & NETWORK_HAS_ERP_VALUE) {
2174                 dst->erp_value = src->erp_value;
2175                 dst->berp_info_valid = src->berp_info_valid = true;
2176         }
2177         dst->beacon_interval = src->beacon_interval;
2178         dst->listen_interval = src->listen_interval;
2179         dst->atim_window = src->atim_window;
2180         dst->dtim_period = src->dtim_period;
2181         dst->dtim_data = src->dtim_data;
2182         dst->last_dtim_sta_time[0] = src->last_dtim_sta_time[0];
2183         dst->last_dtim_sta_time[1] = src->last_dtim_sta_time[1];
2184         memcpy(&dst->tim, &src->tim, sizeof(struct ieee80211_tim_parameters));
2185
2186         dst->bssht.bdSupportHT = src->bssht.bdSupportHT;
2187         dst->bssht.bdRT2RTAggregation = src->bssht.bdRT2RTAggregation;
2188         dst->bssht.bdHTCapLen = src->bssht.bdHTCapLen;
2189         memcpy(dst->bssht.bdHTCapBuf, src->bssht.bdHTCapBuf, src->bssht.bdHTCapLen);
2190         dst->bssht.bdHTInfoLen = src->bssht.bdHTInfoLen;
2191         memcpy(dst->bssht.bdHTInfoBuf, src->bssht.bdHTInfoBuf, src->bssht.bdHTInfoLen);
2192         dst->bssht.bdHTSpecVer = src->bssht.bdHTSpecVer;
2193         dst->bssht.bdRT2RTLongSlotTime = src->bssht.bdRT2RTLongSlotTime;
2194         dst->broadcom_cap_exist = src->broadcom_cap_exist;
2195         dst->ralink_cap_exist = src->ralink_cap_exist;
2196         dst->atheros_cap_exist = src->atheros_cap_exist;
2197         dst->cisco_cap_exist = src->cisco_cap_exist;
2198         dst->unknown_cap_exist = src->unknown_cap_exist;
2199         memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
2200         dst->wpa_ie_len = src->wpa_ie_len;
2201         memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
2202         dst->rsn_ie_len = src->rsn_ie_len;
2203
2204         dst->last_scanned = jiffies;
2205         /* qos related parameters */
2206         //qos_active = src->qos_data.active;
2207         qos_active = dst->qos_data.active;
2208         //old_param = dst->qos_data.old_param_count;
2209         old_param = dst->qos_data.param_count;
2210         if (dst->flags & NETWORK_HAS_QOS_MASK)
2211                 memcpy(&dst->qos_data, &src->qos_data,
2212                         sizeof(struct ieee80211_qos_data));
2213         else {
2214                 dst->qos_data.supported = src->qos_data.supported;
2215                 dst->qos_data.param_count = src->qos_data.param_count;
2216         }
2217
2218         if (dst->qos_data.supported == 1) {
2219                 dst->QoS_Enable = 1;
2220                 if (dst->ssid_len)
2221                         IEEE80211_DEBUG_QOS
2222                                 ("QoS the network %s is QoS supported\n",
2223                                 dst->ssid);
2224                 else
2225                         IEEE80211_DEBUG_QOS
2226                                 ("QoS the network is QoS supported\n");
2227         }
2228         dst->qos_data.active = qos_active;
2229         dst->qos_data.old_param_count = old_param;
2230
2231         /* dst->last_associate is not overwritten */
2232         dst->wmm_info = src->wmm_info; //sure to exist in beacon or probe response frame.
2233         if (src->wmm_param[0].aci_aifsn || \
2234            src->wmm_param[1].aci_aifsn || \
2235            src->wmm_param[2].aci_aifsn || \
2236            src->wmm_param[3].aci_aifsn) {
2237                 memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN);
2238         }
2239         //dst->QoS_Enable = src->QoS_Enable;
2240 #ifdef THOMAS_TURBO
2241         dst->Turbo_Enable = src->Turbo_Enable;
2242 #endif
2243
2244         dst->CountryIeLen = src->CountryIeLen;
2245         memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen);
2246
2247         //added by amy for LEAP
2248         dst->bWithAironetIE = src->bWithAironetIE;
2249         dst->bCkipSupported = src->bCkipSupported;
2250         memcpy(dst->CcxRmState, src->CcxRmState, 2);
2251         dst->bCcxRmEnable = src->bCcxRmEnable;
2252         dst->MBssidMask = src->MBssidMask;
2253         dst->bMBssidValid = src->bMBssidValid;
2254         memcpy(dst->MBssid, src->MBssid, 6);
2255         dst->bWithCcxVerNum = src->bWithCcxVerNum;
2256         dst->BssCcxVerNumber = src->BssCcxVerNumber;
2257
2258 }
2259
2260 static inline int is_beacon(__le16 fc)
2261 {
2262         return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == IEEE80211_STYPE_BEACON);
2263 }
2264
2265 static inline void ieee80211_process_probe_response(
2266         struct ieee80211_device *ieee,
2267         struct ieee80211_probe_response *beacon,
2268         struct ieee80211_rx_stats *stats)
2269 {
2270         struct ieee80211_network *network;
2271         struct ieee80211_network *target;
2272         struct ieee80211_network *oldest = NULL;
2273 #ifdef CONFIG_IEEE80211_DEBUG
2274         struct ieee80211_info_element *info_element = &beacon->info_element[0];
2275 #endif
2276         int fc = WLAN_FC_GET_STYPE(le16_to_cpu(beacon->header.frame_ctl));
2277         unsigned long flags;
2278         short renew;
2279         u16 capability;
2280         //u8 wmm_info;
2281
2282         network = kzalloc(sizeof(*network), GFP_ATOMIC);
2283         if (!network)
2284                 goto out;
2285
2286         capability = le16_to_cpu(beacon->capability);
2287         IEEE80211_DEBUG_SCAN(
2288                 "'%s' (%pM): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
2289                 escape_essid(info_element->data, info_element->len),
2290                 beacon->header.addr3,
2291                 (capability & BIT(0xf)) ? '1' : '0',
2292                 (capability & BIT(0xe)) ? '1' : '0',
2293                 (capability & BIT(0xd)) ? '1' : '0',
2294                 (capability & BIT(0xc)) ? '1' : '0',
2295                 (capability & BIT(0xb)) ? '1' : '0',
2296                 (capability & BIT(0xa)) ? '1' : '0',
2297                 (capability & BIT(0x9)) ? '1' : '0',
2298                 (capability & BIT(0x8)) ? '1' : '0',
2299                 (capability & BIT(0x7)) ? '1' : '0',
2300                 (capability & BIT(0x6)) ? '1' : '0',
2301                 (capability & BIT(0x5)) ? '1' : '0',
2302                 (capability & BIT(0x4)) ? '1' : '0',
2303                 (capability & BIT(0x3)) ? '1' : '0',
2304                 (capability & BIT(0x2)) ? '1' : '0',
2305                 (capability & BIT(0x1)) ? '1' : '0',
2306                 (capability & BIT(0x0)) ? '1' : '0');
2307
2308         if (ieee80211_network_init(ieee, beacon, network, stats)) {
2309                 IEEE80211_DEBUG_SCAN("Dropped '%s' (%pM) via %s.\n",
2310                                      escape_essid(info_element->data,
2311                                                   info_element->len),
2312                                      beacon->header.addr3,
2313                                      fc == IEEE80211_STYPE_PROBE_RESP ?
2314                                      "PROBE RESPONSE" : "BEACON");
2315                 goto out;
2316         }
2317
2318         // For Asus EeePc request,
2319         // (1) if wireless adapter receive get any 802.11d country code in AP beacon,
2320         //         wireless adapter should follow the country code.
2321         // (2)  If there is no any country code in beacon,
2322         //       then wireless adapter should do active scan from ch1~11 and
2323         //       passive scan from ch12~14
2324
2325         if (!is_legal_channel(ieee, network->channel))
2326                 goto out;
2327         if (ieee->bGlobalDomain) {
2328                 if (fc == IEEE80211_STYPE_PROBE_RESP) {
2329                         if (IS_COUNTRY_IE_VALID(ieee)) {
2330                                 // Case 1: Country code
2331                                 if (!is_legal_channel(ieee, network->channel)) {
2332                                         netdev_warn(ieee->dev, "GetScanInfo(): For Country code, filter probe response at channel(%d).\n", network->channel);
2333                                         goto out;
2334                                 }
2335                         } else {
2336                                 // Case 2: No any country code.
2337                                 // Filter over channel ch12~14
2338                                 if (network->channel > 11) {
2339                                         netdev_warn(ieee->dev, "GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n", network->channel);
2340                                         goto out;
2341                                 }
2342                         }
2343                 } else {
2344                         if (IS_COUNTRY_IE_VALID(ieee)) {
2345                                 // Case 1: Country code
2346                                 if (!is_legal_channel(ieee, network->channel)) {
2347                                         netdev_warn(ieee->dev, "GetScanInfo(): For Country code, filter beacon at channel(%d).\n", network->channel);
2348                                         goto out;
2349                                 }
2350                         } else {
2351                                 // Case 2: No any country code.
2352                                 // Filter over channel ch12~14
2353                                 if (network->channel > 14) {
2354                                         netdev_warn(ieee->dev, "GetScanInfo(): For Global Domain, filter beacon at channel(%d).\n", network->channel);
2355                                         goto out;
2356                                 }
2357                         }
2358                 }
2359         }
2360
2361         /* The network parsed correctly -- so now we scan our known networks
2362          * to see if we can find it in our list.
2363          *
2364          * NOTE:  This search is definitely not optimized.  Once its doing
2365          *        the "right thing" we'll optimize it for efficiency if
2366          *        necessary */
2367
2368         /* Search for this entry in the list and update it if it is
2369          * already there. */
2370
2371         spin_lock_irqsave(&ieee->lock, flags);
2372
2373         if (is_same_network(&ieee->current_network, network, ieee)) {
2374                 update_network(&ieee->current_network, network);
2375                 if ((ieee->current_network.mode == IEEE_N_24G || ieee->current_network.mode == IEEE_G)
2376                     && ieee->current_network.berp_info_valid){
2377                         if (ieee->current_network.erp_value & ERP_UseProtection)
2378                                 ieee->current_network.buseprotection = true;
2379                         else
2380                                 ieee->current_network.buseprotection = false;
2381                 }
2382                 if (is_beacon(beacon->header.frame_ctl)) {
2383                         if (ieee->state == IEEE80211_LINKED)
2384                                 ieee->LinkDetectInfo.NumRecvBcnInPeriod++;
2385                 } else //hidden AP
2386                         network->flags = (~NETWORK_EMPTY_ESSID & network->flags) | (NETWORK_EMPTY_ESSID & ieee->current_network.flags);
2387         }
2388
2389         list_for_each_entry(target, &ieee->network_list, list) {
2390                 if (is_same_network(target, network, ieee))
2391                         break;
2392                 if (!oldest ||
2393                     (target->last_scanned < oldest->last_scanned))
2394                         oldest = target;
2395         }
2396
2397         /* If we didn't find a match, then get a new network slot to initialize
2398          * with this beacon's information */
2399         if (&target->list == &ieee->network_list) {
2400                 if (list_empty(&ieee->network_free_list)) {
2401                         /* If there are no more slots, expire the oldest */
2402                         list_del(&oldest->list);
2403                         target = oldest;
2404                         IEEE80211_DEBUG_SCAN("Expired '%s' (%pM) from "
2405                                              "network list.\n",
2406                                              escape_essid(target->ssid,
2407                                                           target->ssid_len),
2408                                              target->bssid);
2409                 } else {
2410                         /* Otherwise just pull from the free list */
2411                         target = list_entry(ieee->network_free_list.next,
2412                                             struct ieee80211_network, list);
2413                         list_del(ieee->network_free_list.next);
2414                 }
2415
2416
2417 #ifdef CONFIG_IEEE80211_DEBUG
2418                 IEEE80211_DEBUG_SCAN("Adding '%s' (%pM) via %s.\n",
2419                                      escape_essid(network->ssid,
2420                                                   network->ssid_len),
2421                                      network->bssid,
2422                                      fc == IEEE80211_STYPE_PROBE_RESP ?
2423                                      "PROBE RESPONSE" : "BEACON");
2424 #endif
2425                 memcpy(target, network, sizeof(*target));
2426                 list_add_tail(&target->list, &ieee->network_list);
2427                 if (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)
2428                         ieee80211_softmac_new_net(ieee, network);
2429         } else {
2430                 IEEE80211_DEBUG_SCAN("Updating '%s' (%pM) via %s.\n",
2431                                      escape_essid(target->ssid,
2432                                                   target->ssid_len),
2433                                      target->bssid,
2434                                      fc == IEEE80211_STYPE_PROBE_RESP ?
2435                                      "PROBE RESPONSE" : "BEACON");
2436
2437                 /* we have an entry and we are going to update it. But this entry may
2438                  * be already expired. In this case we do the same as we found a new
2439                  * net and call the new_net handler
2440                  */
2441                 renew = !time_after(target->last_scanned + ieee->scan_age, jiffies);
2442                 //YJ,add,080819,for hidden ap
2443                 if (is_beacon(beacon->header.frame_ctl) == 0)
2444                         network->flags = (~NETWORK_EMPTY_ESSID & network->flags) | (NETWORK_EMPTY_ESSID & target->flags);
2445                 //if(strncmp(network->ssid, "linksys-c",9) == 0)
2446                 //      printk("====>2 network->ssid=%s FLAG=%d target.ssid=%s FLAG=%d\n", network->ssid, network->flags, target->ssid, target->flags);
2447                 if (((network->flags & NETWORK_EMPTY_ESSID) == NETWORK_EMPTY_ESSID) \
2448                     && (((network->ssid_len > 0) && (strncmp(target->ssid, network->ssid, network->ssid_len)))\
2449  || ((ieee->current_network.ssid_len == network->ssid_len) && (strncmp(ieee->current_network.ssid, network->ssid, network->ssid_len) == 0) && (ieee->state == IEEE80211_NOLINK))))
2450                         renew = 1;
2451                 //YJ,add,080819,for hidden ap,end
2452
2453                 update_network(target, network);
2454                 if (renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE))
2455                         ieee80211_softmac_new_net(ieee, network);
2456         }
2457
2458         spin_unlock_irqrestore(&ieee->lock, flags);
2459         if (is_beacon(beacon->header.frame_ctl) && is_same_network(&ieee->current_network, network, ieee) && \
2460                 (ieee->state == IEEE80211_LINKED)) {
2461                 if (ieee->handle_beacon)
2462                         ieee->handle_beacon(ieee->dev, beacon, &ieee->current_network);
2463         }
2464
2465 out:
2466         kfree(network);
2467 }
2468
2469 void ieee80211_rx_mgt(struct ieee80211_device *ieee,
2470                       struct rtl_80211_hdr_4addr *header,
2471                       struct ieee80211_rx_stats *stats)
2472 {
2473         switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
2474
2475         case IEEE80211_STYPE_BEACON:
2476                 IEEE80211_DEBUG_MGMT("received BEACON (%d)\n",
2477                         WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
2478                 IEEE80211_DEBUG_SCAN("Beacon\n");
2479                 ieee80211_process_probe_response(
2480                         ieee, (struct ieee80211_probe_response *)header, stats);
2481                 break;
2482
2483         case IEEE80211_STYPE_PROBE_RESP:
2484                 IEEE80211_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
2485                         WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
2486                 IEEE80211_DEBUG_SCAN("Probe response\n");
2487                 ieee80211_process_probe_response(
2488                         ieee, (struct ieee80211_probe_response *)header, stats);
2489                 break;
2490
2491         }
2492 }
2493 EXPORT_SYMBOL(ieee80211_rx_mgt);