drivers/staging/rtl8192e/rtllib_rx.c

   1 /*
   2  * Original code based Host AP (software wireless LAN access point) driver
   3  * for Intersil Prism2/2.5/3 - hostap.o module, common routines
   4  *
   5  * Copyright (c) 2001-2002, SSH Communications Security Corp and Jouni Malinen
   6  * <jkmaline@cc.hut.fi>
   7  * Copyright (c) 2002-2003, Jouni Malinen <jkmaline@cc.hut.fi>
   8  * Copyright (c) 2004, Intel Corporation
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation. See README and COPYING for
  13  * more details.
  14  ******************************************************************************
  15
  16   Few modifications for Realtek's Wi-Fi drivers by
  17   Andrea Merello <andrea.merello@gmail.com>
  18
  19   A special thanks goes to Realtek for their support !
  20
  21 ******************************************************************************/
  22
  23
  24 #include <linux/compiler.h>
  25 #include <linux/errno.h>
  26 #include <linux/if_arp.h>
  27 #include <linux/in6.h>
  28 #include <linux/in.h>
  29 #include <linux/ip.h>
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/netdevice.h>
  33 #include <linux/pci.h>
  34 #include <linux/proc_fs.h>
  35 #include <linux/skbuff.h>
  36 #include <linux/slab.h>
  37 #include <linux/tcp.h>
  38 #include <linux/types.h>
  39 #include <linux/wireless.h>
  40 #include <linux/etherdevice.h>
  41 #include <linux/uaccess.h>
  42 #include <linux/ctype.h>
  43
  44 #include "rtllib.h"
  45 #include "dot11d.h"
  46
  47 static inline void rtllib_monitor_rx(struct rtllib_device *ieee,
  48                                 struct sk_buff *skb, struct rtllib_rx_stats *rx_status,
  49                                 size_t hdr_length)
  50 {
  51         skb->dev = ieee->dev;
  52         skb_reset_mac_header(skb);
  53         skb_pull(skb, hdr_length);
  54         skb->pkt_type = PACKET_OTHERHOST;
  55         skb->protocol = htons(ETH_P_80211_RAW);
  56         memset(skb->cb, 0, sizeof(skb->cb));
  57         netif_rx(skb);
  58 }
  59
  60 /* Called only as a tasklet (software IRQ) */
  61 static struct rtllib_frag_entry *
  62 rtllib_frag_cache_find(struct rtllib_device *ieee, unsigned int seq,
  63                           unsigned int frag, u8 tid, u8 *src, u8 *dst)
  64 {
  65         struct rtllib_frag_entry *entry;
  66         int i;
  67
  68         for (i = 0; i < RTLLIB_FRAG_CACHE_LEN; i++) {
  69                 entry = &ieee->frag_cache[tid][i];
  70                 if (entry->skb != NULL &&
  71                     time_after(jiffies, entry->first_frag_time + 2 * HZ)) {
  72                         RTLLIB_DEBUG_FRAG(
  73                                 "expiring fragment cache entry seq=%u last_frag=%u\n",
  74                                 entry->seq, entry->last_frag);
  75                         dev_kfree_skb_any(entry->skb);
  76                         entry->skb = NULL;
  77                 }
  78
  79                 if (entry->skb != NULL && entry->seq == seq &&
  80                     (entry->last_frag + 1 == frag || frag == -1) &&
  81                     memcmp(entry->src_addr, src, ETH_ALEN) == 0 &&
  82                     memcmp(entry->dst_addr, dst, ETH_ALEN) == 0)
  83                         return entry;
  84         }
  85
  86         return NULL;
  87 }
  88
  89 /* Called only as a tasklet (software IRQ) */
  90 static struct sk_buff *
  91 rtllib_frag_cache_get(struct rtllib_device *ieee,
  92                          struct rtllib_hdr_4addr *hdr)
  93 {
  94         struct sk_buff *skb = NULL;
  95         u16 fc = le16_to_cpu(hdr->frame_ctl);
  96         u16 sc = le16_to_cpu(hdr->seq_ctl);
  97         unsigned int frag = WLAN_GET_SEQ_FRAG(sc);
  98         unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
  99         struct rtllib_frag_entry *entry;
 100         struct rtllib_hdr_3addrqos *hdr_3addrqos;
 101         struct rtllib_hdr_4addrqos *hdr_4addrqos;
 102         u8 tid;
 103
 104         if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) && RTLLIB_QOS_HAS_SEQ(fc)) {
 105                 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)hdr;
 106                 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 107                 tid = UP2AC(tid);
 108                 tid++;
 109         } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
 110                 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)hdr;
 111                 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 112                 tid = UP2AC(tid);
 113                 tid++;
 114         } else {
 115                 tid = 0;
 116         }
 117
 118         if (frag == 0) {
 119                 /* Reserve enough space to fit maximum frame length */
 120                 skb = dev_alloc_skb(ieee->dev->mtu +
 121                                     sizeof(struct rtllib_hdr_4addr) +
 122                                     8 /* LLC */ +
 123                                     2 /* alignment */ +
 124                                     8 /* WEP */ +
 125                                     ETH_ALEN /* WDS */ +
 126                                     (RTLLIB_QOS_HAS_SEQ(fc) ? 2 : 0) /* QOS Control */);
 127                 if (skb == NULL)
 128                         return NULL;
 129
 130                 entry = &ieee->frag_cache[tid][ieee->frag_next_idx[tid]];
 131                 ieee->frag_next_idx[tid]++;
 132                 if (ieee->frag_next_idx[tid] >= RTLLIB_FRAG_CACHE_LEN)
 133                         ieee->frag_next_idx[tid] = 0;
 134
 135                 if (entry->skb != NULL)
 136                         dev_kfree_skb_any(entry->skb);
 137
 138                 entry->first_frag_time = jiffies;
 139                 entry->seq = seq;
 140                 entry->last_frag = frag;
 141                 entry->skb = skb;
 142                 ether_addr_copy(entry->src_addr, hdr->addr2);
 143                 ether_addr_copy(entry->dst_addr, hdr->addr1);
 144         } else {
 145                 /* received a fragment of a frame for which the head fragment
 146                  * should have already been received
 147                  */
 148                 entry = rtllib_frag_cache_find(ieee, seq, frag, tid, hdr->addr2,
 149                                                   hdr->addr1);
 150                 if (entry != NULL) {
 151                         entry->last_frag = frag;
 152                         skb = entry->skb;
 153                 }
 154         }
 155
 156         return skb;
 157 }
 158
 159
 160 /* Called only as a tasklet (software IRQ) */
 161 static int rtllib_frag_cache_invalidate(struct rtllib_device *ieee,
 162                                            struct rtllib_hdr_4addr *hdr)
 163 {
 164         u16 fc = le16_to_cpu(hdr->frame_ctl);
 165         u16 sc = le16_to_cpu(hdr->seq_ctl);
 166         unsigned int seq = WLAN_GET_SEQ_SEQ(sc);
 167         struct rtllib_frag_entry *entry;
 168         struct rtllib_hdr_3addrqos *hdr_3addrqos;
 169         struct rtllib_hdr_4addrqos *hdr_4addrqos;
 170         u8 tid;
 171
 172         if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) && RTLLIB_QOS_HAS_SEQ(fc)) {
 173                 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)hdr;
 174                 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 175                 tid = UP2AC(tid);
 176                 tid++;
 177         } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
 178                 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)hdr;
 179                 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 180                 tid = UP2AC(tid);
 181                 tid++;
 182         } else {
 183                 tid = 0;
 184         }
 185
 186         entry = rtllib_frag_cache_find(ieee, seq, -1, tid, hdr->addr2,
 187                                           hdr->addr1);
 188
 189         if (entry == NULL) {
 190                 RTLLIB_DEBUG_FRAG(
 191                         "could not invalidate fragment cache entry (seq=%u)\n", seq);
 192                 return -1;
 193         }
 194
 195         entry->skb = NULL;
 196         return 0;
 197 }
 198
 199 /* rtllib_rx_frame_mgtmt
 200  *
 201  * Responsible for handling management control frames
 202  *
 203  * Called by rtllib_rx
 204  */
 205 static inline int
 206 rtllib_rx_frame_mgmt(struct rtllib_device *ieee, struct sk_buff *skb,
 207                         struct rtllib_rx_stats *rx_stats, u16 type,
 208                         u16 stype)
 209 {
 210         /* On the struct stats definition there is written that
 211          * this is not mandatory.... but seems that the probe
 212          * response parser uses it
 213          */
 214         struct rtllib_hdr_3addr *hdr = (struct rtllib_hdr_3addr *)skb->data;
 215
 216         rx_stats->len = skb->len;
 217         rtllib_rx_mgt(ieee, skb, rx_stats);
 218         if ((memcmp(hdr->addr1, ieee->dev->dev_addr, ETH_ALEN))) {
 219                 dev_kfree_skb_any(skb);
 220                 return 0;
 221         }
 222         rtllib_rx_frame_softmac(ieee, skb, rx_stats, type, stype);
 223
 224         dev_kfree_skb_any(skb);
 225
 226         return 0;
 227 }
 228
 229 /* See IEEE 802.1H for LLC/SNAP encapsulation/decapsulation
 230  * Ethernet-II snap header (RFC1042 for most EtherTypes)
 231  */
 232 static unsigned char rfc1042_header[] = {
 233         0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00
 234 };
 235 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
 236 static unsigned char bridge_tunnel_header[] = {
 237         0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8
 238 };
 239 /* No encapsulation header if EtherType < 0x600 (=length) */
 240
 241 /* Called by rtllib_rx_frame_decrypt */
 242 static int rtllib_is_eapol_frame(struct rtllib_device *ieee,
 243                                     struct sk_buff *skb, size_t hdrlen)
 244 {
 245         struct net_device *dev = ieee->dev;
 246         u16 fc, ethertype;
 247         struct rtllib_hdr_4addr *hdr;
 248         u8 *pos;
 249
 250         if (skb->len < 24)
 251                 return 0;
 252
 253         hdr = (struct rtllib_hdr_4addr *) skb->data;
 254         fc = le16_to_cpu(hdr->frame_ctl);
 255
 256         /* check that the frame is unicast frame to us */
 257         if ((fc & (RTLLIB_FCTL_TODS | RTLLIB_FCTL_FROMDS)) ==
 258             RTLLIB_FCTL_TODS &&
 259             memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0 &&
 260             memcmp(hdr->addr3, dev->dev_addr, ETH_ALEN) == 0) {
 261                 /* ToDS frame with own addr BSSID and DA */
 262         } else if ((fc & (RTLLIB_FCTL_TODS | RTLLIB_FCTL_FROMDS)) ==
 263                    RTLLIB_FCTL_FROMDS &&
 264                    memcmp(hdr->addr1, dev->dev_addr, ETH_ALEN) == 0) {
 265                 /* FromDS frame with own addr as DA */
 266         } else
 267                 return 0;
 268
 269         if (skb->len < 24 + 8)
 270                 return 0;
 271
 272         /* check for port access entity Ethernet type */
 273         pos = skb->data + hdrlen;
 274         ethertype = (pos[6] << 8) | pos[7];
 275         if (ethertype == ETH_P_PAE)
 276                 return 1;
 277
 278         return 0;
 279 }
 280
 281 /* Called only as a tasklet (software IRQ), by rtllib_rx */
 282 static inline int
 283 rtllib_rx_frame_decrypt(struct rtllib_device *ieee, struct sk_buff *skb,
 284                         struct lib80211_crypt_data *crypt)
 285 {
 286         struct rtllib_hdr_4addr *hdr;
 287         int res, hdrlen;
 288
 289         if (crypt == NULL || crypt->ops->decrypt_mpdu == NULL)
 290                 return 0;
 291
 292         if (ieee->hwsec_active) {
 293                 struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
 294
 295                 tcb_desc->bHwSec = 1;
 296
 297                 if (ieee->need_sw_enc)
 298                         tcb_desc->bHwSec = 0;
 299         }
 300
 301         hdr = (struct rtllib_hdr_4addr *) skb->data;
 302         hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 303
 304         atomic_inc(&crypt->refcnt);
 305         res = crypt->ops->decrypt_mpdu(skb, hdrlen, crypt->priv);
 306         atomic_dec(&crypt->refcnt);
 307         if (res < 0) {
 308                 RTLLIB_DEBUG_DROP(
 309                         "decryption failed (SA= %pM) res=%d\n", hdr->addr2, res);
 310                 if (res == -2)
 311                         RTLLIB_DEBUG_DROP("Decryption failed ICV mismatch (key %d)\n",
 312                                              skb->data[hdrlen + 3] >> 6);
 313                 ieee->ieee_stats.rx_discards_undecryptable++;
 314                 return -1;
 315         }
 316
 317         return res;
 318 }
 319
 320
 321 /* Called only as a tasklet (software IRQ), by rtllib_rx */
 322 static inline int
 323 rtllib_rx_frame_decrypt_msdu(struct rtllib_device *ieee, struct sk_buff *skb,
 324                              int keyidx, struct lib80211_crypt_data *crypt)
 325 {
 326         struct rtllib_hdr_4addr *hdr;
 327         int res, hdrlen;
 328
 329         if (crypt == NULL || crypt->ops->decrypt_msdu == NULL)
 330                 return 0;
 331         if (ieee->hwsec_active) {
 332                 struct cb_desc *tcb_desc = (struct cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
 333
 334                 tcb_desc->bHwSec = 1;
 335
 336                 if (ieee->need_sw_enc)
 337                         tcb_desc->bHwSec = 0;
 338         }
 339
 340         hdr = (struct rtllib_hdr_4addr *) skb->data;
 341         hdrlen = rtllib_get_hdrlen(le16_to_cpu(hdr->frame_ctl));
 342
 343         atomic_inc(&crypt->refcnt);
 344         res = crypt->ops->decrypt_msdu(skb, keyidx, hdrlen, crypt->priv);
 345         atomic_dec(&crypt->refcnt);
 346         if (res < 0) {
 347                 printk(KERN_DEBUG "%s: MSDU decryption/MIC verification failed (SA= %pM keyidx=%d)\n",
 348                        ieee->dev->name, hdr->addr2, keyidx);
 349                 return -1;
 350         }
 351
 352         return 0;
 353 }
 354
 355
 356 /* this function is stolen from ipw2200 driver*/
 357 #define IEEE_PACKET_RETRY_TIME (5*HZ)
 358 static int is_duplicate_packet(struct rtllib_device *ieee,
 359                                       struct rtllib_hdr_4addr *header)
 360 {
 361         u16 fc = le16_to_cpu(header->frame_ctl);
 362         u16 sc = le16_to_cpu(header->seq_ctl);
 363         u16 seq = WLAN_GET_SEQ_SEQ(sc);
 364         u16 frag = WLAN_GET_SEQ_FRAG(sc);
 365         u16 *last_seq, *last_frag;
 366         unsigned long *last_time;
 367         struct rtllib_hdr_3addrqos *hdr_3addrqos;
 368         struct rtllib_hdr_4addrqos *hdr_4addrqos;
 369         u8 tid;
 370
 371         if (((fc & RTLLIB_FCTL_DSTODS) == RTLLIB_FCTL_DSTODS) && RTLLIB_QOS_HAS_SEQ(fc)) {
 372                 hdr_4addrqos = (struct rtllib_hdr_4addrqos *)header;
 373                 tid = le16_to_cpu(hdr_4addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 374                 tid = UP2AC(tid);
 375                 tid++;
 376         } else if (RTLLIB_QOS_HAS_SEQ(fc)) {
 377                 hdr_3addrqos = (struct rtllib_hdr_3addrqos *)header;
 378                 tid = le16_to_cpu(hdr_3addrqos->qos_ctl) & RTLLIB_QCTL_TID;
 379                 tid = UP2AC(tid);
 380                 tid++;
 381         } else {
 382                 tid = 0;
 383         }
 384
 385         switch (ieee->iw_mode) {
 386         case IW_MODE_ADHOC:
 387         {
 388                 struct list_head *p;
 389                 struct ieee_ibss_seq *entry = NULL;
 390                 u8 *mac = header->addr2;
 391                 int index = mac[5] % IEEE_IBSS_MAC_HASH_SIZE;
 392
 393                 list_for_each(p, &ieee->ibss_mac_hash[index]) {
 394                         entry = list_entry(p, struct ieee_ibss_seq, list);
 395                         if (!memcmp(entry->mac, mac, ETH_ALEN))
 396                                 break;
 397                 }
 398                 if (p == &ieee->ibss_mac_hash[index]) {
 399                         entry = kmalloc(sizeof(struct ieee_ibss_seq), GFP_ATOMIC);
 400                         if (!entry)
 401                                 return 0;
 402
 403                         ether_addr_copy(entry->mac, mac);
 404                         entry->seq_num[tid] = seq;
 405                         entry->frag_num[tid] = frag;
 406                         entry->packet_time[tid] = jiffies;
 407                         list_add(&entry->list, &ieee->ibss_mac_hash[index]);
 408                         return 0;
 409                 }
 410                 last_seq = &entry->seq_num[tid];
 411                 last_frag = &entry->frag_num[tid];
 412                 last_time = &entry->packet_time[tid];
 413                 break;
 414         }
 415
 416         case IW_MODE_INFRA:
 417                 last_seq = &ieee->last_rxseq_num[tid];
 418                 last_frag = &ieee->last_rxfrag_num[tid];
 419                 last_time = &ieee->last_packet_time[tid];
 420                 break;
 421         default:
 422                 return 0;
 423         }
 424
 425         if ((*last_seq == seq) &&
 426             time_after(*last_time + IEEE_PACKET_RETRY_TIME, jiffies)) {
 427                 if (*last_frag == frag)
 428                         goto drop;
 429                 if (*last_frag + 1 != frag)
 430                         /* out-of-order fragment */
 431                         goto drop;
 432         } else
 433                 *last_seq = seq;
 434
 435         *last_frag = frag;
 436         *last_time = jiffies;
 437         return 0;
 438
 439 drop:
 440
 441         return 1;
 442 }
 443
 444 static bool AddReorderEntry(struct rx_ts_record *pTS,
 445                             struct rx_reorder_entry *pReorderEntry)
 446 {
 447         struct list_head *pList = &pTS->RxPendingPktList;
 448
 449         while (pList->next != &pTS->RxPendingPktList) {
 450                 if (SN_LESS(pReorderEntry->SeqNum, ((struct rx_reorder_entry *)
 451                     list_entry(pList->next, struct rx_reorder_entry,
 452                     List))->SeqNum))
 453                         pList = pList->next;
 454                 else if (SN_EQUAL(pReorderEntry->SeqNum,
 455                         ((struct rx_reorder_entry *)list_entry(pList->next,
 456                         struct rx_reorder_entry, List))->SeqNum))
 457                                 return false;
 458                 else
 459                         break;
 460         }
 461         pReorderEntry->List.next = pList->next;
 462         pReorderEntry->List.next->prev = &pReorderEntry->List;
 463         pReorderEntry->List.prev = pList;
 464         pList->next = &pReorderEntry->List;
 465
 466         return true;
 467 }
 468
 469 void rtllib_indicate_packets(struct rtllib_device *ieee, struct rtllib_rxb **prxbIndicateArray, u8 index)
 470 {
 471         struct net_device_stats *stats = &ieee->stats;
 472         u8 i = 0, j = 0;
 473         u16 ethertype;
 474
 475         for (j = 0; j < index; j++) {
 476                 struct rtllib_rxb *prxb = prxbIndicateArray[j];
 477
 478                 for (i = 0; i < prxb->nr_subframes; i++) {
 479                         struct sk_buff *sub_skb = prxb->subframes[i];
 480
 481                 /* convert hdr + possible LLC headers into Ethernet header */
 482                         ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
 483                         if (sub_skb->len >= 8 &&
 484                             ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
 485                             ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
 486                             memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
 487                                 /* remove RFC1042 or Bridge-Tunnel encapsulation
 488                                  * and replace EtherType
 489                                  */
 490                                 skb_pull(sub_skb, SNAP_SIZE);
 491                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
 492                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
 493                         } else {
 494                                 u16 len;
 495                         /* Leave Ethernet header part of hdr and full payload */
 496                                 len = sub_skb->len;
 497                                 memcpy(skb_push(sub_skb, 2), &len, 2);
 498                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->src, ETH_ALEN);
 499                                 memcpy(skb_push(sub_skb, ETH_ALEN), prxb->dst, ETH_ALEN);
 500                         }
 501
 502                         /* Indicate the packets to upper layer */
 503                         if (sub_skb) {
 504                                 stats->rx_packets++;
 505                                 stats->rx_bytes += sub_skb->len;
 506
 507                                 memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
 508                                 sub_skb->protocol = eth_type_trans(sub_skb, ieee->dev);
 509                                 sub_skb->dev = ieee->dev;
 510                                 sub_skb->dev->stats.rx_packets++;
 511                                 sub_skb->dev->stats.rx_bytes += sub_skb->len;
 512                                 sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
 513                                 ieee->last_rx_ps_time = jiffies;
 514                                 netif_rx(sub_skb);
 515                         }
 516                 }
 517                 kfree(prxb);
 518                 prxb = NULL;
 519         }
 520 }
 521
 522 void rtllib_FlushRxTsPendingPkts(struct rtllib_device *ieee,    struct rx_ts_record *pTS)
 523 {
 524         struct rx_reorder_entry *pRxReorderEntry;
 525         u8 RfdCnt = 0;
 526
 527         del_timer_sync(&pTS->RxPktPendingTimer);
 528         while (!list_empty(&pTS->RxPendingPktList)) {
 529                 if (RfdCnt >= REORDER_WIN_SIZE) {
 530                         netdev_info(ieee->dev,
 531                                     "-------------->%s() error! RfdCnt >= REORDER_WIN_SIZE\n",
 532                                     __func__);
 533                         break;
 534                 }
 535
 536                 pRxReorderEntry = (struct rx_reorder_entry *)list_entry(pTS->RxPendingPktList.prev, struct rx_reorder_entry, List);
 537                 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): Indicate SeqNum %d!\n", __func__, pRxReorderEntry->SeqNum);
 538                 list_del_init(&pRxReorderEntry->List);
 539
 540                 ieee->RfdArray[RfdCnt] = pRxReorderEntry->prxb;
 541
 542                 RfdCnt = RfdCnt + 1;
 543                 list_add_tail(&pRxReorderEntry->List, &ieee->RxReorder_Unused_List);
 544         }
 545         rtllib_indicate_packets(ieee, ieee->RfdArray, RfdCnt);
 546
 547         pTS->RxIndicateSeq = 0xffff;
 548 }
 549
 550 static void RxReorderIndicatePacket(struct rtllib_device *ieee,
 551                                     struct rtllib_rxb *prxb,
 552                                     struct rx_ts_record *pTS, u16 SeqNum)
 553 {
 554         struct rt_hi_throughput *pHTInfo = ieee->pHTInfo;
 555         struct rx_reorder_entry *pReorderEntry = NULL;
 556         u8 WinSize = pHTInfo->RxReorderWinSize;
 557         u16 WinEnd = 0;
 558         u8 index = 0;
 559         bool bMatchWinStart = false, bPktInBuf = false;
 560         unsigned long flags;
 561
 562         RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): Seq is %d, pTS->RxIndicateSeq is %d, WinSize is %d\n", __func__, SeqNum,
 563                      pTS->RxIndicateSeq, WinSize);
 564
 565         spin_lock_irqsave(&(ieee->reorder_spinlock), flags);
 566
 567         WinEnd = (pTS->RxIndicateSeq + WinSize - 1) % 4096;
 568         /* Rx Reorder initialize condition.*/
 569         if (pTS->RxIndicateSeq == 0xffff)
 570                 pTS->RxIndicateSeq = SeqNum;
 571
 572         /* Drop out the packet which SeqNum is smaller than WinStart */
 573         if (SN_LESS(SeqNum, pTS->RxIndicateSeq)) {
 574                 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "Packet Drop! IndicateSeq: %d, NewSeq: %d\n",
 575                                  pTS->RxIndicateSeq, SeqNum);
 576                 pHTInfo->RxReorderDropCounter++;
 577                 {
 578                         int i;
 579
 580                         for (i = 0; i < prxb->nr_subframes; i++)
 581                                 dev_kfree_skb(prxb->subframes[i]);
 582                         kfree(prxb);
 583                         prxb = NULL;
 584                 }
 585                 spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
 586                 return;
 587         }
 588
 589         /* Sliding window manipulation. Conditions includes:
 590          * 1. Incoming SeqNum is equal to WinStart =>Window shift 1
 591          * 2. Incoming SeqNum is larger than the WinEnd => Window shift N
 592          */
 593         if (SN_EQUAL(SeqNum, pTS->RxIndicateSeq)) {
 594                 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
 595                 bMatchWinStart = true;
 596         } else if (SN_LESS(WinEnd, SeqNum)) {
 597                 if (SeqNum >= (WinSize - 1))
 598                         pTS->RxIndicateSeq = SeqNum + 1 - WinSize;
 599                 else
 600                         pTS->RxIndicateSeq = 4095 - (WinSize - (SeqNum + 1)) + 1;
 601                 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "Window Shift! IndicateSeq: %d, NewSeq: %d\n", pTS->RxIndicateSeq, SeqNum);
 602         }
 603
 604         /* Indication process.
 605          * After Packet dropping and Sliding Window shifting as above, we can
 606          * now just indicate the packets with the SeqNum smaller than latest
 607          * WinStart and struct buffer other packets.
 608          *
 609          * For Rx Reorder condition:
 610          * 1. All packets with SeqNum smaller than WinStart => Indicate
 611          * 2. All packets with SeqNum larger than or equal to
 612          *       WinStart => Buffer it.
 613          */
 614         if (bMatchWinStart) {
 615                 /* Current packet is going to be indicated.*/
 616                 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "Packets indication!! IndicateSeq: %d, NewSeq: %d\n",
 617                                 pTS->RxIndicateSeq, SeqNum);
 618                 ieee->prxbIndicateArray[0] = prxb;
 619                 index = 1;
 620         } else {
 621                 /* Current packet is going to be inserted into pending list.*/
 622                 if (!list_empty(&ieee->RxReorder_Unused_List)) {
 623                         pReorderEntry = (struct rx_reorder_entry *)
 624                                         list_entry(ieee->RxReorder_Unused_List.next,
 625                                         struct rx_reorder_entry, List);
 626                         list_del_init(&pReorderEntry->List);
 627
 628                         /* Make a reorder entry and insert into a the packet list.*/
 629                         pReorderEntry->SeqNum = SeqNum;
 630                         pReorderEntry->prxb = prxb;
 631
 632                         if (!AddReorderEntry(pTS, pReorderEntry)) {
 633                                 RTLLIB_DEBUG(RTLLIB_DL_REORDER,
 634                                              "%s(): Duplicate packet is dropped!! IndicateSeq: %d, NewSeq: %d\n",
 635                                             __func__, pTS->RxIndicateSeq,
 636                                             SeqNum);
 637                                 list_add_tail(&pReorderEntry->List,
 638                                               &ieee->RxReorder_Unused_List); {
 639                                         int i;
 640
 641                                         for (i = 0; i < prxb->nr_subframes; i++)
 642                                                 dev_kfree_skb(prxb->subframes[i]);
 643                                         kfree(prxb);
 644                                         prxb = NULL;
 645                                 }
 646                         } else {
 647                                 RTLLIB_DEBUG(RTLLIB_DL_REORDER,
 648                                          "Pkt insert into struct buffer!! IndicateSeq: %d, NewSeq: %d\n",
 649                                          pTS->RxIndicateSeq, SeqNum);
 650                         }
 651                 } else {
 652                         /* Packets are dropped if there are not enough reorder
 653                          * entries. This part should be modified!! We can just
 654                          * indicate all the packets in struct buffer and get
 655                          * reorder entries.
 656                          */
 657                         RTLLIB_DEBUG(RTLLIB_DL_ERR, "RxReorderIndicatePacket(): There is no reorder entry!! Packet is dropped!!\n");
 658                         {
 659                                 int i;
 660
 661                                 for (i = 0; i < prxb->nr_subframes; i++)
 662                                         dev_kfree_skb(prxb->subframes[i]);
 663                                 kfree(prxb);
 664                                 prxb = NULL;
 665                         }
 666                 }
 667         }
 668
 669         /* Check if there is any packet need indicate.*/
 670         while (!list_empty(&pTS->RxPendingPktList)) {
 671                 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): start RREORDER indicate\n", __func__);
 672
 673                 pReorderEntry = (struct rx_reorder_entry *)list_entry(pTS->RxPendingPktList.prev,
 674                                  struct rx_reorder_entry, List);
 675                 if (SN_LESS(pReorderEntry->SeqNum, pTS->RxIndicateSeq) ||
 676                                 SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq)) {
 677                         /* This protect struct buffer from overflow. */
 678                         if (index >= REORDER_WIN_SIZE) {
 679                                 RTLLIB_DEBUG(RTLLIB_DL_ERR, "RxReorderIndicatePacket(): Buffer overflow!!\n");
 680                                 bPktInBuf = true;
 681                                 break;
 682                         }
 683
 684                         list_del_init(&pReorderEntry->List);
 685
 686                         if (SN_EQUAL(pReorderEntry->SeqNum, pTS->RxIndicateSeq))
 687                                 pTS->RxIndicateSeq = (pTS->RxIndicateSeq + 1) % 4096;
 688
 689                         ieee->prxbIndicateArray[index] = pReorderEntry->prxb;
 690                         RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): Indicate SeqNum %d!\n", __func__, pReorderEntry->SeqNum);
 691                         index++;
 692
 693                         list_add_tail(&pReorderEntry->List,
 694                                       &ieee->RxReorder_Unused_List);
 695                 } else {
 696                         bPktInBuf = true;
 697                         break;
 698                 }
 699         }
 700
 701         /* Handling pending timer. Set this timer to prevent from long time
 702          * Rx buffering.
 703          */
 704         if (index > 0) {
 705                 if (timer_pending(&pTS->RxPktPendingTimer))
 706                         del_timer_sync(&pTS->RxPktPendingTimer);
 707                 pTS->RxTimeoutIndicateSeq = 0xffff;
 708
 709                 if (index > REORDER_WIN_SIZE) {
 710                         RTLLIB_DEBUG(RTLLIB_DL_ERR, "RxReorderIndicatePacket(): Rx Reorder struct buffer full!!\n");
 711                         spin_unlock_irqrestore(&(ieee->reorder_spinlock),
 712                                                flags);
 713                         return;
 714                 }
 715                 rtllib_indicate_packets(ieee, ieee->prxbIndicateArray, index);
 716                 bPktInBuf = false;
 717         }
 718
 719         if (bPktInBuf && pTS->RxTimeoutIndicateSeq == 0xffff) {
 720                 RTLLIB_DEBUG(RTLLIB_DL_REORDER, "%s(): SET rx timeout timer\n",
 721                              __func__);
 722                 pTS->RxTimeoutIndicateSeq = pTS->RxIndicateSeq;
 723                 mod_timer(&pTS->RxPktPendingTimer, jiffies +
 724                           msecs_to_jiffies(pHTInfo->RxReorderPendingTime));
 725         }
 726         spin_unlock_irqrestore(&(ieee->reorder_spinlock), flags);
 727 }
 728
 729 static u8 parse_subframe(struct rtllib_device *ieee, struct sk_buff *skb,
 730                          struct rtllib_rx_stats *rx_stats,
 731                          struct rtllib_rxb *rxb, u8 *src, u8 *dst)
 732 {
 733         struct rtllib_hdr_3addr  *hdr = (struct rtllib_hdr_3addr *)skb->data;
 734         u16             fc = le16_to_cpu(hdr->frame_ctl);
 735
 736         u16             LLCOffset = sizeof(struct rtllib_hdr_3addr);
 737         u16             ChkLength;
 738         bool            bIsAggregateFrame = false;
 739         u16             nSubframe_Length;
 740         u8              nPadding_Length = 0;
 741         u16             SeqNum = 0;
 742         struct sk_buff *sub_skb;
 743         u8           *data_ptr;
 744         /* just for debug purpose */
 745         SeqNum = WLAN_GET_SEQ_SEQ(le16_to_cpu(hdr->seq_ctl));
 746         if ((RTLLIB_QOS_HAS_SEQ(fc)) &&
 747            (((union frameqos *)(skb->data + RTLLIB_3ADDR_LEN))->field.reserved))
 748                 bIsAggregateFrame = true;
 749
 750         if (RTLLIB_QOS_HAS_SEQ(fc))
 751                 LLCOffset += 2;
 752         if (rx_stats->bContainHTC)
 753                 LLCOffset += sHTCLng;
 754
 755         ChkLength = LLCOffset;
 756
 757         if (skb->len <= ChkLength)
 758                 return 0;
 759
 760         skb_pull(skb, LLCOffset);
 761         ieee->bIsAggregateFrame = bIsAggregateFrame;
 762         if (!bIsAggregateFrame) {
 763                 rxb->nr_subframes = 1;
 764
 765                 /* altered by clark 3/30/2010
 766                  * The struct buffer size of the skb indicated to upper layer
 767                  * must be less than 5000, or the defraged IP datagram
 768                  * in the IP layer will exceed "ipfrag_high_tresh" and be
 769                  * discarded. so there must not use the function
 770                  * "skb_copy" and "skb_clone" for "skb".
 771                  */
 772
 773                 /* Allocate new skb for releasing to upper layer */
 774                 sub_skb = dev_alloc_skb(RTLLIB_SKBBUFFER_SIZE);
 775                 if (!sub_skb)
 776                         return 0;
 777                 skb_reserve(sub_skb, 12);
 778                 data_ptr = (u8 *)skb_put(sub_skb, skb->len);
 779                 memcpy(data_ptr, skb->data, skb->len);
 780                 sub_skb->dev = ieee->dev;
 781
 782                 rxb->subframes[0] = sub_skb;
 783
 784                 memcpy(rxb->src, src, ETH_ALEN);
 785                 memcpy(rxb->dst, dst, ETH_ALEN);
 786                 rxb->subframes[0]->dev = ieee->dev;
 787                 return 1;
 788         }
 789
 790         rxb->nr_subframes = 0;
 791         memcpy(rxb->src, src, ETH_ALEN);
 792         memcpy(rxb->dst, dst, ETH_ALEN);
 793         while (skb->len > ETHERNET_HEADER_SIZE) {
 794                 /* Offset 12 denote 2 mac address */
 795                 nSubframe_Length = *((u16 *)(skb->data + 12));
 796                 nSubframe_Length = (nSubframe_Length >> 8) +
 797                                    (nSubframe_Length << 8);
 798
 799                 if (skb->len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) {
 800                         netdev_info(ieee->dev,
 801                                     "%s: A-MSDU parse error!! pRfd->nTotalSubframe : %d\n",
 802                                     __func__, rxb->nr_subframes);
 803                         netdev_info(ieee->dev,
 804                                     "%s: A-MSDU parse error!! Subframe Length: %d\n",
 805                                     __func__, nSubframe_Length);
 806                         netdev_info(ieee->dev,
 807                                     "nRemain_Length is %d and nSubframe_Length is : %d\n",
 808                                     skb->len, nSubframe_Length);
 809                         netdev_info(ieee->dev,
 810                                     "The Packet SeqNum is %d\n",
 811                                     SeqNum);
 812                         return 0;
 813                 }
 814
 815                 /* move the data point to data content */
 816                 skb_pull(skb, ETHERNET_HEADER_SIZE);
 817
 818                 /* altered by clark 3/30/2010
 819                  * The struct buffer size of the skb indicated to upper layer
 820                  * must be less than 5000, or the defraged IP datagram
 821                  * in the IP layer will exceed "ipfrag_high_tresh" and be
 822                  * discarded. so there must not use the function
 823                  * "skb_copy" and "skb_clone" for "skb".
 824                  */
 825
 826                 /* Allocate new skb for releasing to upper layer */
 827                 sub_skb = dev_alloc_skb(nSubframe_Length + 12);
 828                 if (!sub_skb)
 829                         return 0;
 830                 skb_reserve(sub_skb, 12);
 831                 data_ptr = (u8 *)skb_put(sub_skb, nSubframe_Length);
 832                 memcpy(data_ptr, skb->data, nSubframe_Length);
 833
 834                 sub_skb->dev = ieee->dev;
 835                 rxb->subframes[rxb->nr_subframes++] = sub_skb;
 836                 if (rxb->nr_subframes >= MAX_SUBFRAME_COUNT) {
 837                         RTLLIB_DEBUG_RX("ParseSubframe(): Too many Subframes! Packets dropped!\n");
 838                         break;
 839                 }
 840                 skb_pull(skb, nSubframe_Length);
 841
 842                 if (skb->len != 0) {
 843                         nPadding_Length = 4 - ((nSubframe_Length +
 844                                           ETHERNET_HEADER_SIZE) % 4);
 845                         if (nPadding_Length == 4)
 846                                 nPadding_Length = 0;
 847
 848                         if (skb->len < nPadding_Length)
 849                                 return 0;
 850
 851                         skb_pull(skb, nPadding_Length);
 852                 }
 853         }
 854
 855         return rxb->nr_subframes;
 856 }
 857
 858
 859 static size_t rtllib_rx_get_hdrlen(struct rtllib_device *ieee,
 860                                    struct sk_buff *skb,
 861                                    struct rtllib_rx_stats *rx_stats)
 862 {
 863         struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
 864         u16 fc = le16_to_cpu(hdr->frame_ctl);
 865         size_t hdrlen = 0;
 866
 867         hdrlen = rtllib_get_hdrlen(fc);
 868         if (HTCCheck(ieee, skb->data)) {
 869                 if (net_ratelimit())
 870                         netdev_info(ieee->dev, "%s: find HTCControl!\n",
 871                                     __func__);
 872                 hdrlen += 4;
 873                 rx_stats->bContainHTC = true;
 874         }
 875
 876          if (RTLLIB_QOS_HAS_SEQ(fc))
 877                 rx_stats->bIsQosData = true;
 878
 879         return hdrlen;
 880 }
 881
 882 static int rtllib_rx_check_duplicate(struct rtllib_device *ieee,
 883                                      struct sk_buff *skb, u8 multicast)
 884 {
 885         struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
 886         u16 fc, sc;
 887         u8 frag, type, stype;
 888
 889         fc = le16_to_cpu(hdr->frame_ctl);
 890         type = WLAN_FC_GET_TYPE(fc);
 891         stype = WLAN_FC_GET_STYPE(fc);
 892         sc = le16_to_cpu(hdr->seq_ctl);
 893         frag = WLAN_GET_SEQ_FRAG(sc);
 894
 895         if ((ieee->pHTInfo->bCurRxReorderEnable == false) ||
 896                 !ieee->current_network.qos_data.active ||
 897                 !IsDataFrame(skb->data) ||
 898                 IsLegacyDataFrame(skb->data)) {
 899                 if (!((type == RTLLIB_FTYPE_MGMT) && (stype == RTLLIB_STYPE_BEACON))) {
 900                         if (is_duplicate_packet(ieee, hdr))
 901                                 return -1;
 902                 }
 903         } else {
 904                 struct rx_ts_record *pRxTS = NULL;
 905
 906                 if (GetTs(ieee, (struct ts_common_info **) &pRxTS, hdr->addr2,
 907                         (u8)Frame_QoSTID((u8 *)(skb->data)), RX_DIR, true)) {
 908                         if ((fc & (1<<11)) && (frag == pRxTS->RxLastFragNum) &&
 909                             (WLAN_GET_SEQ_SEQ(sc) == pRxTS->RxLastSeqNum))
 910                                 return -1;
 911                         pRxTS->RxLastFragNum = frag;
 912                         pRxTS->RxLastSeqNum = WLAN_GET_SEQ_SEQ(sc);
 913                 } else {
 914                         RTLLIB_DEBUG(RTLLIB_DL_ERR, "ERR!!%s(): No TS!! Skip the check!!\n", __func__);
 915                         return -1;
 916                 }
 917         }
 918
 919         return 0;
 920 }
 921
 922 static void rtllib_rx_extract_addr(struct rtllib_device *ieee,
 923                                    struct rtllib_hdr_4addr *hdr, u8 *dst,
 924                                    u8 *src, u8 *bssid)
 925 {
 926         u16 fc = le16_to_cpu(hdr->frame_ctl);
 927
 928         switch (fc & (RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS)) {
 929         case RTLLIB_FCTL_FROMDS:
 930                 ether_addr_copy(dst, hdr->addr1);
 931                 ether_addr_copy(src, hdr->addr3);
 932                 ether_addr_copy(bssid, hdr->addr2);
 933                 break;
 934         case RTLLIB_FCTL_TODS:
 935                 ether_addr_copy(dst, hdr->addr3);
 936                 ether_addr_copy(src, hdr->addr2);
 937                 ether_addr_copy(bssid, hdr->addr1);
 938                 break;
 939         case RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS:
 940                 ether_addr_copy(dst, hdr->addr3);
 941                 ether_addr_copy(src, hdr->addr4);
 942                 ether_addr_copy(bssid, ieee->current_network.bssid);
 943                 break;
 944         case 0:
 945                 ether_addr_copy(dst, hdr->addr1);
 946                 ether_addr_copy(src, hdr->addr2);
 947                 ether_addr_copy(bssid, hdr->addr3);
 948                 break;
 949         }
 950 }
 951
 952 static int rtllib_rx_data_filter(struct rtllib_device *ieee, u16 fc,
 953                                  u8 *dst, u8 *src, u8 *bssid, u8 *addr2)
 954 {
 955         u8 type, stype;
 956
 957         type = WLAN_FC_GET_TYPE(fc);
 958         stype = WLAN_FC_GET_STYPE(fc);
 959
 960         /* Filter frames from different BSS */
 961         if (((fc & RTLLIB_FCTL_DSTODS) != RTLLIB_FCTL_DSTODS) &&
 962             !ether_addr_equal(ieee->current_network.bssid, bssid) &&
 963             !is_zero_ether_addr(ieee->current_network.bssid)) {
 964                 return -1;
 965         }
 966
 967         /* Filter packets sent by an STA that will be forwarded by AP */
 968         if (ieee->IntelPromiscuousModeInfo.bPromiscuousOn  &&
 969                 ieee->IntelPromiscuousModeInfo.bFilterSourceStationFrame) {
 970                 if ((fc & RTLLIB_FCTL_TODS) && !(fc & RTLLIB_FCTL_FROMDS) &&
 971                     !ether_addr_equal(dst, ieee->current_network.bssid) &&
 972                     ether_addr_equal(bssid, ieee->current_network.bssid)) {
 973                         return -1;
 974                 }
 975         }
 976
 977         /* Nullfunc frames may have PS-bit set, so they must be passed to
 978          * hostap_handle_sta_rx() before being dropped here.
 979          */
 980         if (!ieee->IntelPromiscuousModeInfo.bPromiscuousOn) {
 981                 if (stype != RTLLIB_STYPE_DATA &&
 982                     stype != RTLLIB_STYPE_DATA_CFACK &&
 983                     stype != RTLLIB_STYPE_DATA_CFPOLL &&
 984                     stype != RTLLIB_STYPE_DATA_CFACKPOLL &&
 985                     stype != RTLLIB_STYPE_QOS_DATA) {
 986                         if (stype != RTLLIB_STYPE_NULLFUNC)
 987                                 RTLLIB_DEBUG_DROP(
 988                                         "RX: dropped data frame with no data (type=0x%02x, subtype=0x%02x)\n",
 989                                         type, stype);
 990                         return -1;
 991                 }
 992         }
 993
 994         if (ieee->iw_mode != IW_MODE_MESH) {
 995                 /* packets from our adapter are dropped (echo) */
 996                 if (!memcmp(src, ieee->dev->dev_addr, ETH_ALEN))
 997                         return -1;
 998
 999                 /* {broad,multi}cast packets to our BSS go through */
1000                 if (is_multicast_ether_addr(dst)) {
1001                         if (memcmp(bssid, ieee->current_network.bssid, ETH_ALEN))
1002                                 return -1;
1003                 }
1004         }
1005         return 0;
1006 }
1007
1008 static int rtllib_rx_get_crypt(struct rtllib_device *ieee, struct sk_buff *skb,
1009                         struct lib80211_crypt_data **crypt, size_t hdrlen)
1010 {
1011         struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1012         u16 fc = le16_to_cpu(hdr->frame_ctl);
1013         int idx = 0;
1014
1015         if (ieee->host_decrypt) {
1016                 if (skb->len >= hdrlen + 3)
1017                         idx = skb->data[hdrlen + 3] >> 6;
1018
1019                 *crypt = ieee->crypt_info.crypt[idx];
1020                 /* allow NULL decrypt to indicate an station specific override
1021                  * for default encryption
1022                  */
1023                 if (*crypt && ((*crypt)->ops == NULL ||
1024                               (*crypt)->ops->decrypt_mpdu == NULL))
1025                         *crypt = NULL;
1026
1027                 if (!*crypt && (fc & RTLLIB_FCTL_WEP)) {
1028                         /* This seems to be triggered by some (multicast?)
1029                          * frames from other than current BSS, so just drop the
1030                          * frames silently instead of filling system log with
1031                          * these reports.
1032                          */
1033                         RTLLIB_DEBUG_DROP("Decryption failed (not set) (SA= %pM)\n",
1034                                              hdr->addr2);
1035                         ieee->ieee_stats.rx_discards_undecryptable++;
1036                         return -1;
1037                 }
1038         }
1039
1040         return 0;
1041 }
1042
1043 static int rtllib_rx_decrypt(struct rtllib_device *ieee, struct sk_buff *skb,
1044                       struct rtllib_rx_stats *rx_stats,
1045                       struct lib80211_crypt_data *crypt, size_t hdrlen)
1046 {
1047         struct rtllib_hdr_4addr *hdr;
1048         int keyidx = 0;
1049         u16 fc, sc;
1050         u8 frag;
1051
1052         hdr = (struct rtllib_hdr_4addr *)skb->data;
1053         fc = le16_to_cpu(hdr->frame_ctl);
1054         sc = le16_to_cpu(hdr->seq_ctl);
1055         frag = WLAN_GET_SEQ_FRAG(sc);
1056
1057         if ((!rx_stats->Decrypted))
1058                 ieee->need_sw_enc = 1;
1059         else
1060                 ieee->need_sw_enc = 0;
1061
1062         keyidx = rtllib_rx_frame_decrypt(ieee, skb, crypt);
1063         if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) && (keyidx < 0)) {
1064                 netdev_info(ieee->dev, "%s: decrypt frame error\n", __func__);
1065                 return -1;
1066         }
1067
1068         hdr = (struct rtllib_hdr_4addr *) skb->data;
1069         if ((frag != 0 || (fc & RTLLIB_FCTL_MOREFRAGS))) {
1070                 int flen;
1071                 struct sk_buff *frag_skb = rtllib_frag_cache_get(ieee, hdr);
1072
1073                 RTLLIB_DEBUG_FRAG("Rx Fragment received (%u)\n", frag);
1074
1075                 if (!frag_skb) {
1076                         RTLLIB_DEBUG(RTLLIB_DL_RX | RTLLIB_DL_FRAG,
1077                                         "Rx cannot get skb from fragment cache (morefrag=%d seq=%u frag=%u)\n",
1078                                         (fc & RTLLIB_FCTL_MOREFRAGS) != 0,
1079                                         WLAN_GET_SEQ_SEQ(sc), frag);
1080                         return -1;
1081                 }
1082                 flen = skb->len;
1083                 if (frag != 0)
1084                         flen -= hdrlen;
1085
1086                 if (frag_skb->tail + flen > frag_skb->end) {
1087                         netdev_warn(ieee->dev,
1088                                     "%s: host decrypted and reassembled frame did not fit skb\n",
1089                                     __func__);
1090                         rtllib_frag_cache_invalidate(ieee, hdr);
1091                         return -1;
1092                 }
1093
1094                 if (frag == 0) {
1095                         /* copy first fragment (including full headers) into
1096                          * beginning of the fragment cache skb
1097                          */
1098                         memcpy(skb_put(frag_skb, flen), skb->data, flen);
1099                 } else {
1100                         /* append frame payload to the end of the fragment
1101                          * cache skb
1102                          */
1103                         memcpy(skb_put(frag_skb, flen), skb->data + hdrlen,
1104                                flen);
1105                 }
1106                 dev_kfree_skb_any(skb);
1107                 skb = NULL;
1108
1109                 if (fc & RTLLIB_FCTL_MOREFRAGS) {
1110                         /* more fragments expected - leave the skb in fragment
1111                          * cache for now; it will be delivered to upper layers
1112                          * after all fragments have been received
1113                          */
1114                         return -2;
1115                 }
1116
1117                 /* this was the last fragment and the frame will be
1118                  * delivered, so remove skb from fragment cache
1119                  */
1120                 skb = frag_skb;
1121                 hdr = (struct rtllib_hdr_4addr *) skb->data;
1122                 rtllib_frag_cache_invalidate(ieee, hdr);
1123         }
1124
1125         /* skb: hdr + (possible reassembled) full MSDU payload; possibly still
1126          * encrypted/authenticated
1127          */
1128         if (ieee->host_decrypt && (fc & RTLLIB_FCTL_WEP) &&
1129                 rtllib_rx_frame_decrypt_msdu(ieee, skb, keyidx, crypt)) {
1130                 netdev_info(ieee->dev, "%s: ==>decrypt msdu error\n", __func__);
1131                 return -1;
1132         }
1133
1134         hdr = (struct rtllib_hdr_4addr *) skb->data;
1135         if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep) {
1136                 if (/*ieee->ieee802_1x &&*/
1137                     rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1138
1139                         /* pass unencrypted EAPOL frames even if encryption is
1140                          * configured
1141                          */
1142                         struct eapol *eap = (struct eapol *)(skb->data +
1143                                 24);
1144                         RTLLIB_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1145                                                 eap_get_type(eap->type));
1146                 } else {
1147                         RTLLIB_DEBUG_DROP(
1148                                 "encryption configured, but RX frame not encrypted (SA= %pM)\n",
1149                                 hdr->addr2);
1150                         return -1;
1151                 }
1152         }
1153
1154         if (crypt && !(fc & RTLLIB_FCTL_WEP) &&
1155             rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1156                         struct eapol *eap = (struct eapol *)(skb->data +
1157                                 24);
1158                         RTLLIB_DEBUG_EAP("RX: IEEE 802.1X EAPOL frame: %s\n",
1159                                                 eap_get_type(eap->type));
1160         }
1161
1162         if (crypt && !(fc & RTLLIB_FCTL_WEP) && !ieee->open_wep &&
1163             !rtllib_is_eapol_frame(ieee, skb, hdrlen)) {
1164                 RTLLIB_DEBUG_DROP(
1165                         "dropped unencrypted RX data frame from %pM (drop_unencrypted=1)\n",
1166                         hdr->addr2);
1167                 return -1;
1168         }
1169
1170         if (rtllib_is_eapol_frame(ieee, skb, hdrlen))
1171                 netdev_warn(ieee->dev, "RX: IEEE802.1X EAPOL frame!\n");
1172
1173         return 0;
1174 }
1175
1176 static void rtllib_rx_check_leave_lps(struct rtllib_device *ieee, u8 unicast, u8 nr_subframes)
1177 {
1178         if (unicast) {
1179
1180                 if (ieee->state == RTLLIB_LINKED) {
1181                         if (((ieee->LinkDetectInfo.NumRxUnicastOkInPeriod +
1182                             ieee->LinkDetectInfo.NumTxOkInPeriod) > 8) ||
1183                             (ieee->LinkDetectInfo.NumRxUnicastOkInPeriod > 2)) {
1184                                 if (ieee->LeisurePSLeave)
1185                                         ieee->LeisurePSLeave(ieee->dev);
1186                         }
1187                 }
1188         }
1189         ieee->last_rx_ps_time = jiffies;
1190 }
1191
1192 static void rtllib_rx_indicate_pkt_legacy(struct rtllib_device *ieee,
1193                 struct rtllib_rx_stats *rx_stats,
1194                 struct rtllib_rxb *rxb,
1195                 u8 *dst,
1196                 u8 *src)
1197 {
1198         struct net_device *dev = ieee->dev;
1199         u16 ethertype;
1200         int i = 0;
1201
1202         if (rxb == NULL) {
1203                 netdev_info(dev, "%s: rxb is NULL!!\n", __func__);
1204                 return;
1205         }
1206
1207         for (i = 0; i < rxb->nr_subframes; i++) {
1208                 struct sk_buff *sub_skb = rxb->subframes[i];
1209
1210                 if (sub_skb) {
1211                         /* convert hdr + possible LLC headers into Ethernet header */
1212                         ethertype = (sub_skb->data[6] << 8) | sub_skb->data[7];
1213                         if (sub_skb->len >= 8 &&
1214                                 ((memcmp(sub_skb->data, rfc1042_header, SNAP_SIZE) == 0 &&
1215                                 ethertype != ETH_P_AARP && ethertype != ETH_P_IPX) ||
1216                                 memcmp(sub_skb->data, bridge_tunnel_header, SNAP_SIZE) == 0)) {
1217                                 /* remove RFC1042 or Bridge-Tunnel encapsulation and
1218                                  * replace EtherType
1219                                  */
1220                                 skb_pull(sub_skb, SNAP_SIZE);
1221                                 ether_addr_copy(skb_push(sub_skb, ETH_ALEN),
1222                                                 src);
1223                                 ether_addr_copy(skb_push(sub_skb, ETH_ALEN),
1224                                                 dst);
1225                         } else {
1226                                 u16 len;
1227                                 /* Leave Ethernet header part of hdr and full payload */
1228                                 len = sub_skb->len;
1229                                 memcpy(skb_push(sub_skb, 2), &len, 2);
1230                                 ether_addr_copy(skb_push(sub_skb, ETH_ALEN),
1231                                                 src);
1232                                 ether_addr_copy(skb_push(sub_skb, ETH_ALEN),
1233                                                 dst);
1234                         }
1235
1236                         ieee->stats.rx_packets++;
1237                         ieee->stats.rx_bytes += sub_skb->len;
1238
1239                         if (is_multicast_ether_addr(dst))
1240                                 ieee->stats.multicast++;
1241
1242                         /* Indicate the packets to upper layer */
1243                         memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
1244                         sub_skb->protocol = eth_type_trans(sub_skb, dev);
1245                         sub_skb->dev = dev;
1246                         sub_skb->dev->stats.rx_packets++;
1247                         sub_skb->dev->stats.rx_bytes += sub_skb->len;
1248                         sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
1249                         netif_rx(sub_skb);
1250                 }
1251         }
1252         kfree(rxb);
1253 }
1254
1255 static int rtllib_rx_InfraAdhoc(struct rtllib_device *ieee, struct sk_buff *skb,
1256                  struct rtllib_rx_stats *rx_stats)
1257 {
1258         struct net_device *dev = ieee->dev;
1259         struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1260         struct lib80211_crypt_data *crypt = NULL;
1261         struct rtllib_rxb *rxb = NULL;
1262         struct rx_ts_record *pTS = NULL;
1263         u16 fc, sc, SeqNum = 0;
1264         u8 type, stype, multicast = 0, unicast = 0, nr_subframes = 0, TID = 0;
1265         u8 *payload;
1266         u8 dst[ETH_ALEN];
1267         u8 src[ETH_ALEN];
1268         u8 bssid[ETH_ALEN] = {0};
1269
1270         size_t hdrlen = 0;
1271         bool bToOtherSTA = false;
1272         int ret = 0, i = 0;
1273
1274         hdr = (struct rtllib_hdr_4addr *)skb->data;
1275         fc = le16_to_cpu(hdr->frame_ctl);
1276         type = WLAN_FC_GET_TYPE(fc);
1277         stype = WLAN_FC_GET_STYPE(fc);
1278         sc = le16_to_cpu(hdr->seq_ctl);
1279
1280         /*Filter pkt not to me*/
1281         multicast = is_multicast_ether_addr(hdr->addr1);
1282         unicast = !multicast;
1283         if (unicast && !ether_addr_equal(dev->dev_addr, hdr->addr1)) {
1284                 if (ieee->bNetPromiscuousMode)
1285                         bToOtherSTA = true;
1286                 else
1287                         goto rx_dropped;
1288         }
1289
1290         /*Filter pkt has too small length */
1291         hdrlen = rtllib_rx_get_hdrlen(ieee, skb, rx_stats);
1292         if (skb->len < hdrlen) {
1293                 netdev_info(dev, "%s():ERR!!! skb->len is smaller than hdrlen\n",
1294                             __func__);
1295                 goto rx_dropped;
1296         }
1297
1298         /* Filter Duplicate pkt */
1299         ret = rtllib_rx_check_duplicate(ieee, skb, multicast);
1300         if (ret < 0)
1301                 goto rx_dropped;
1302
1303         /* Filter CTRL Frame */
1304         if (type == RTLLIB_FTYPE_CTL)
1305                 goto rx_dropped;
1306
1307         /* Filter MGNT Frame */
1308         if (type == RTLLIB_FTYPE_MGMT) {
1309                 if (bToOtherSTA)
1310                         goto rx_dropped;
1311                 if (rtllib_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
1312                         goto rx_dropped;
1313                 else
1314                         goto rx_exit;
1315         }
1316
1317         /* Filter WAPI DATA Frame */
1318
1319         /* Update statstics for AP roaming */
1320         if (!bToOtherSTA) {
1321                 ieee->LinkDetectInfo.NumRecvDataInPeriod++;
1322                 ieee->LinkDetectInfo.NumRxOkInPeriod++;
1323         }
1324         dev->last_rx = jiffies;
1325
1326         /* Data frame - extract src/dst addresses */
1327         rtllib_rx_extract_addr(ieee, hdr, dst, src, bssid);
1328
1329         /* Filter Data frames */
1330         ret = rtllib_rx_data_filter(ieee, fc, dst, src, bssid, hdr->addr2);
1331         if (ret < 0)
1332                 goto rx_dropped;
1333
1334         if (skb->len == hdrlen)
1335                 goto rx_dropped;
1336
1337         /* Send pspoll based on moredata */
1338         if ((ieee->iw_mode == IW_MODE_INFRA)  && (ieee->sta_sleep == LPS_IS_SLEEP)
1339                 && (ieee->polling) && (!bToOtherSTA)) {
1340                 if (WLAN_FC_MORE_DATA(fc)) {
1341                         /* more data bit is set, let's request a new frame from the AP */
1342                         rtllib_sta_ps_send_pspoll_frame(ieee);
1343                 } else {
1344                         ieee->polling =  false;
1345                 }
1346         }
1347
1348         /* Get crypt if encrypted */
1349         ret = rtllib_rx_get_crypt(ieee, skb, &crypt, hdrlen);
1350         if (ret == -1)
1351                 goto rx_dropped;
1352
1353         /* Decrypt data frame (including reassemble) */
1354         ret = rtllib_rx_decrypt(ieee, skb, rx_stats, crypt, hdrlen);
1355         if (ret == -1)
1356                 goto rx_dropped;
1357         else if (ret == -2)
1358                 goto rx_exit;
1359
1360         /* Get TS for Rx Reorder  */
1361         hdr = (struct rtllib_hdr_4addr *) skb->data;
1362         if (ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data)
1363                 && !is_multicast_ether_addr(hdr->addr1)
1364                 && (!bToOtherSTA)) {
1365                 TID = Frame_QoSTID(skb->data);
1366                 SeqNum = WLAN_GET_SEQ_SEQ(sc);
1367                 GetTs(ieee, (struct ts_common_info **) &pTS, hdr->addr2, TID, RX_DIR, true);
1368                 if (TID != 0 && TID != 3)
1369                         ieee->bis_any_nonbepkts = true;
1370         }
1371
1372         /* Parse rx data frame (For AMSDU) */
1373         /* skb: hdr + (possible reassembled) full plaintext payload */
1374         payload = skb->data + hdrlen;
1375         rxb = kmalloc(sizeof(struct rtllib_rxb), GFP_ATOMIC);
1376         if (rxb == NULL)
1377                 goto rx_dropped;
1378
1379         /* to parse amsdu packets */
1380         /* qos data packets & reserved bit is 1 */
1381         if (parse_subframe(ieee, skb, rx_stats, rxb, src, dst) == 0) {
1382                 /* only to free rxb, and not submit the packets to upper layer */
1383                 for (i = 0; i < rxb->nr_subframes; i++)
1384                         dev_kfree_skb(rxb->subframes[i]);
1385                 kfree(rxb);
1386                 rxb = NULL;
1387                 goto rx_dropped;
1388         }
1389
1390         /* Update WAPI PN */
1391
1392         /* Check if leave LPS */
1393         if (!bToOtherSTA) {
1394                 if (ieee->bIsAggregateFrame)
1395                         nr_subframes = rxb->nr_subframes;
1396                 else
1397                         nr_subframes = 1;
1398                 if (unicast)
1399                         ieee->LinkDetectInfo.NumRxUnicastOkInPeriod += nr_subframes;
1400                 rtllib_rx_check_leave_lps(ieee, unicast, nr_subframes);
1401         }
1402
1403         /* Indicate packets to upper layer or Rx Reorder */
1404         if (ieee->pHTInfo->bCurRxReorderEnable == false || pTS == NULL || bToOtherSTA)
1405                 rtllib_rx_indicate_pkt_legacy(ieee, rx_stats, rxb, dst, src);
1406         else
1407                 RxReorderIndicatePacket(ieee, rxb, pTS, SeqNum);
1408
1409         dev_kfree_skb(skb);
1410
1411  rx_exit:
1412         return 1;
1413
1414  rx_dropped:
1415         ieee->stats.rx_dropped++;
1416
1417         /* Returning 0 indicates to caller that we have not handled the SKB--
1418          * so it is still allocated and can be used again by underlying
1419          * hardware as a DMA target
1420          */
1421         return 0;
1422 }
1423
1424 static int rtllib_rx_Master(struct rtllib_device *ieee, struct sk_buff *skb,
1425                  struct rtllib_rx_stats *rx_stats)
1426 {
1427         return 0;
1428 }
1429
1430 static int rtllib_rx_Monitor(struct rtllib_device *ieee, struct sk_buff *skb,
1431                  struct rtllib_rx_stats *rx_stats)
1432 {
1433         struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1434         u16 fc = le16_to_cpu(hdr->frame_ctl);
1435         size_t hdrlen = rtllib_get_hdrlen(fc);
1436
1437         if (skb->len < hdrlen) {
1438                 netdev_info(ieee->dev,
1439                             "%s():ERR!!! skb->len is smaller than hdrlen\n",
1440                             __func__);
1441                 return 0;
1442         }
1443
1444         if (HTCCheck(ieee, skb->data)) {
1445                 if (net_ratelimit())
1446                         netdev_info(ieee->dev, "%s: Find HTCControl!\n",
1447                                     __func__);
1448                 hdrlen += 4;
1449         }
1450
1451         rtllib_monitor_rx(ieee, skb, rx_stats, hdrlen);
1452         ieee->stats.rx_packets++;
1453         ieee->stats.rx_bytes += skb->len;
1454
1455         return 1;
1456 }
1457
1458 static int rtllib_rx_Mesh(struct rtllib_device *ieee, struct sk_buff *skb,
1459                  struct rtllib_rx_stats *rx_stats)
1460 {
1461         return 0;
1462 }
1463
1464 /* All received frames are sent to this function. @skb contains the frame in
1465  * IEEE 802.11 format, i.e., in the format it was sent over air.
1466  * This function is called only as a tasklet (software IRQ).
1467  */
1468 int rtllib_rx(struct rtllib_device *ieee, struct sk_buff *skb,
1469                  struct rtllib_rx_stats *rx_stats)
1470 {
1471         int ret = 0;
1472
1473         if ((NULL == ieee) || (NULL == skb) || (NULL == rx_stats)) {
1474                 pr_info("%s: Input parameters NULL!\n", __func__);
1475                 goto rx_dropped;
1476         }
1477         if (skb->len < 10) {
1478                 netdev_info(ieee->dev, "%s: SKB length < 10\n", __func__);
1479                 goto rx_dropped;
1480         }
1481
1482         switch (ieee->iw_mode) {
1483         case IW_MODE_ADHOC:
1484         case IW_MODE_INFRA:
1485                 ret = rtllib_rx_InfraAdhoc(ieee, skb, rx_stats);
1486                 break;
1487         case IW_MODE_MASTER:
1488         case IW_MODE_REPEAT:
1489                 ret = rtllib_rx_Master(ieee, skb, rx_stats);
1490                 break;
1491         case IW_MODE_MONITOR:
1492                 ret = rtllib_rx_Monitor(ieee, skb, rx_stats);
1493                 break;
1494         case IW_MODE_MESH:
1495                 ret = rtllib_rx_Mesh(ieee, skb, rx_stats);
1496                 break;
1497         default:
1498                 netdev_info(ieee->dev, "%s: ERR iw mode!!!\n", __func__);
1499                 break;
1500         }
1501
1502         return ret;
1503
1504  rx_dropped:
1505         if (ieee)
1506                 ieee->stats.rx_dropped++;
1507         return 0;
1508 }
1509 EXPORT_SYMBOL(rtllib_rx);
1510
1511 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
1512
1513 /* Make ther structure we read from the beacon packet has the right values */
1514 static int rtllib_verify_qos_info(struct rtllib_qos_information_element
1515                                      *info_element, int sub_type)
1516 {
1517
1518         if (info_element->qui_subtype != sub_type)
1519                 return -1;
1520         if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
1521                 return -1;
1522         if (info_element->qui_type != QOS_OUI_TYPE)
1523                 return -1;
1524         if (info_element->version != QOS_VERSION_1)
1525                 return -1;
1526
1527         return 0;
1528 }
1529
1530
1531 /* Parse a QoS parameter element */
1532 static int rtllib_read_qos_param_element(struct rtllib_qos_parameter_info
1533                                             *element_param, struct rtllib_info_element
1534                                             *info_element)
1535 {
1536         int ret = 0;
1537         u16 size = sizeof(struct rtllib_qos_parameter_info) - 2;
1538
1539         if ((info_element == NULL) || (element_param == NULL))
1540                 return -1;
1541
1542         if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
1543                 memcpy(element_param->info_element.qui, info_element->data,
1544                        info_element->len);
1545                 element_param->info_element.elementID = info_element->id;
1546                 element_param->info_element.length = info_element->len;
1547         } else
1548                 ret = -1;
1549         if (ret == 0)
1550                 ret = rtllib_verify_qos_info(&element_param->info_element,
1551                                                 QOS_OUI_PARAM_SUB_TYPE);
1552         return ret;
1553 }
1554
1555 /* Parse a QoS information element */
1556 static int rtllib_read_qos_info_element(struct
1557                                            rtllib_qos_information_element
1558                                            *element_info, struct rtllib_info_element
1559                                            *info_element)
1560 {
1561         int ret = 0;
1562         u16 size = sizeof(struct rtllib_qos_information_element) - 2;
1563
1564         if (element_info == NULL)
1565                 return -1;
1566         if (info_element == NULL)
1567                 return -1;
1568
1569         if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
1570                 memcpy(element_info->qui, info_element->data,
1571                        info_element->len);
1572                 element_info->elementID = info_element->id;
1573                 element_info->length = info_element->len;
1574         } else
1575                 ret = -1;
1576
1577         if (ret == 0)
1578                 ret = rtllib_verify_qos_info(element_info,
1579                                                 QOS_OUI_INFO_SUB_TYPE);
1580         return ret;
1581 }
1582
1583
1584 /* Write QoS parameters from the ac parameters. */
1585 static int rtllib_qos_convert_ac_to_parameters(struct rtllib_qos_parameter_info *param_elm,
1586                 struct rtllib_qos_data *qos_data)
1587 {
1588         struct rtllib_qos_ac_parameter *ac_params;
1589         struct rtllib_qos_parameters *qos_param = &(qos_data->parameters);
1590         int i;
1591         u8 aci;
1592         u8 acm;
1593
1594         qos_data->wmm_acm = 0;
1595         for (i = 0; i < QOS_QUEUE_NUM; i++) {
1596                 ac_params = &(param_elm->ac_params_record[i]);
1597
1598                 aci = (ac_params->aci_aifsn & 0x60) >> 5;
1599                 acm = (ac_params->aci_aifsn & 0x10) >> 4;
1600
1601                 if (aci >= QOS_QUEUE_NUM)
1602                         continue;
1603                 switch (aci) {
1604                 case 1:
1605                         /* BIT(0) | BIT(3) */
1606                         if (acm)
1607                                 qos_data->wmm_acm |= (0x01<<0)|(0x01<<3);
1608                         break;
1609                 case 2:
1610                         /* BIT(4) | BIT(5) */
1611                         if (acm)
1612                                 qos_data->wmm_acm |= (0x01<<4)|(0x01<<5);
1613                         break;
1614                 case 3:
1615                         /* BIT(6) | BIT(7) */
1616                         if (acm)
1617                                 qos_data->wmm_acm |= (0x01<<6)|(0x01<<7);
1618                         break;
1619                 case 0:
1620                 default:
1621                         /* BIT(1) | BIT(2) */
1622                         if (acm)
1623                                 qos_data->wmm_acm |= (0x01<<1)|(0x01<<2);
1624                         break;
1625                 }
1626
1627                 qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f;
1628
1629                 /* WMM spec P.11: The minimum value for AIFSN shall be 2 */
1630                 qos_param->aifs[aci] = (qos_param->aifs[aci] < 2) ? 2 : qos_param->aifs[aci];
1631
1632                 qos_param->cw_min[aci] = cpu_to_le16(ac_params->ecw_min_max & 0x0F);
1633
1634                 qos_param->cw_max[aci] = cpu_to_le16((ac_params->ecw_min_max & 0xF0) >> 4);
1635
1636                 qos_param->flag[aci] =
1637                     (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1638                 qos_param->tx_op_limit[aci] = ac_params->tx_op_limit;
1639         }
1640         return 0;
1641 }
1642
1643 /* we have a generic data element which it may contain QoS information or
1644  * parameters element. check the information element length to decide
1645  * which type to read
1646  */
1647 static int rtllib_parse_qos_info_param_IE(struct rtllib_info_element
1648                                              *info_element,
1649                                              struct rtllib_network *network)
1650 {
1651         int rc = 0;
1652         struct rtllib_qos_information_element qos_info_element;
1653
1654         rc = rtllib_read_qos_info_element(&qos_info_element, info_element);
1655
1656         if (rc == 0) {
1657                 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1658                 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1659         } else {
1660                 struct rtllib_qos_parameter_info param_element;
1661
1662                 rc = rtllib_read_qos_param_element(&param_element,
1663                                                       info_element);
1664                 if (rc == 0) {
1665                         rtllib_qos_convert_ac_to_parameters(&param_element,
1666                                                                &(network->qos_data));
1667                         network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1668                         network->qos_data.param_count =
1669                             param_element.info_element.ac_info & 0x0F;
1670                 }
1671         }
1672
1673         if (rc == 0) {
1674                 RTLLIB_DEBUG_QOS("QoS is supported\n");
1675                 network->qos_data.supported = 1;
1676         }
1677         return rc;
1678 }
1679
1680 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
1681
1682 static const char *get_info_element_string(u16 id)
1683 {
1684         switch (id) {
1685         MFIE_STRING(SSID);
1686         MFIE_STRING(RATES);
1687         MFIE_STRING(FH_SET);
1688         MFIE_STRING(DS_SET);
1689         MFIE_STRING(CF_SET);
1690         MFIE_STRING(TIM);
1691         MFIE_STRING(IBSS_SET);
1692         MFIE_STRING(COUNTRY);
1693         MFIE_STRING(HOP_PARAMS);
1694         MFIE_STRING(HOP_TABLE);
1695         MFIE_STRING(REQUEST);
1696         MFIE_STRING(CHALLENGE);
1697         MFIE_STRING(POWER_CONSTRAINT);
1698         MFIE_STRING(POWER_CAPABILITY);
1699         MFIE_STRING(TPC_REQUEST);
1700         MFIE_STRING(TPC_REPORT);
1701         MFIE_STRING(SUPP_CHANNELS);
1702         MFIE_STRING(CSA);
1703         MFIE_STRING(MEASURE_REQUEST);
1704         MFIE_STRING(MEASURE_REPORT);
1705         MFIE_STRING(QUIET);
1706         MFIE_STRING(IBSS_DFS);
1707         MFIE_STRING(RSN);
1708         MFIE_STRING(RATES_EX);
1709         MFIE_STRING(GENERIC);
1710         MFIE_STRING(QOS_PARAMETER);
1711         default:
1712                 return "UNKNOWN";
1713         }
1714 }
1715
1716 static inline void rtllib_extract_country_ie(
1717         struct rtllib_device *ieee,
1718         struct rtllib_info_element *info_element,
1719         struct rtllib_network *network,
1720         u8 *addr2)
1721 {
1722         if (IS_DOT11D_ENABLE(ieee)) {
1723                 if (info_element->len != 0) {
1724                         memcpy(network->CountryIeBuf, info_element->data, info_element->len);
1725                         network->CountryIeLen = info_element->len;
1726
1727                         if (!IS_COUNTRY_IE_VALID(ieee)) {
1728                                 if (rtllib_act_scanning(ieee, false) && ieee->FirstIe_InScan)
1729                                         netdev_info(ieee->dev,
1730                                                     "Received beacon ContryIE, SSID: <%s>\n",
1731                                                     network->ssid);
1732                                 Dot11d_UpdateCountryIe(ieee, addr2, info_element->len, info_element->data);
1733                         }
1734                 }
1735
1736                 if (IS_EQUAL_CIE_SRC(ieee, addr2))
1737                         UPDATE_CIE_WATCHDOG(ieee);
1738         }
1739
1740 }
1741
1742 int rtllib_parse_info_param(struct rtllib_device *ieee,
1743                 struct rtllib_info_element *info_element,
1744                 u16 length,
1745                 struct rtllib_network *network,
1746                 struct rtllib_rx_stats *stats)
1747 {
1748         u8 i;
1749         short offset;
1750         u16     tmp_htcap_len = 0;
1751         u16     tmp_htinfo_len = 0;
1752         u16 ht_realtek_agg_len = 0;
1753         u8  ht_realtek_agg_buf[MAX_IE_LEN];
1754         char rates_str[64];
1755         char *p;
1756
1757         while (length >= sizeof(*info_element)) {
1758                 if (sizeof(*info_element) + info_element->len > length) {
1759                         RTLLIB_DEBUG_MGMT("Info elem: parse failed: info_element->len + 2 > left : info_element->len+2=%zd left=%d, id=%d.\n",
1760                                              info_element->len +
1761                                              sizeof(*info_element),
1762                                              length, info_element->id);
1763                         /* We stop processing but don't return an error here
1764                          * because some misbehaviour APs break this rule. ie.
1765                          * Orinoco AP1000.
1766                          */
1767                         break;
1768                 }
1769
1770                 switch (info_element->id) {
1771                 case MFIE_TYPE_SSID:
1772                         if (rtllib_is_empty_essid(info_element->data,
1773                                                      info_element->len)) {
1774                                 network->flags |= NETWORK_EMPTY_ESSID;
1775                                 break;
1776                         }
1777
1778                         network->ssid_len = min(info_element->len,
1779                                                 (u8) IW_ESSID_MAX_SIZE);
1780                         memcpy(network->ssid, info_element->data, network->ssid_len);
1781                         if (network->ssid_len < IW_ESSID_MAX_SIZE)
1782                                 memset(network->ssid + network->ssid_len, 0,
1783                                        IW_ESSID_MAX_SIZE - network->ssid_len);
1784
1785                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
1786                                              network->ssid, network->ssid_len);
1787                         break;
1788
1789                 case MFIE_TYPE_RATES:
1790                         p = rates_str;
1791                         network->rates_len = min(info_element->len,
1792                                                  MAX_RATES_LENGTH);
1793                         for (i = 0; i < network->rates_len; i++) {
1794                                 network->rates[i] = info_element->data[i];
1795                                 p += snprintf(p, sizeof(rates_str) -
1796                                               (p - rates_str), "%02X ",
1797                                               network->rates[i]);
1798                                 if (rtllib_is_ofdm_rate
1799                                     (info_element->data[i])) {
1800                                         network->flags |= NETWORK_HAS_OFDM;
1801                                         if (info_element->data[i] &
1802                                             RTLLIB_BASIC_RATE_MASK)
1803                                                 network->flags &=
1804                                                     ~NETWORK_HAS_CCK;
1805                                 }
1806
1807                                 if (rtllib_is_cck_rate
1808                                     (info_element->data[i])) {
1809                                         network->flags |= NETWORK_HAS_CCK;
1810                                 }
1811                         }
1812
1813                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
1814                                              rates_str, network->rates_len);
1815                         break;
1816
1817                 case MFIE_TYPE_RATES_EX:
1818                         p = rates_str;
1819                         network->rates_ex_len = min(info_element->len,
1820                                                     MAX_RATES_EX_LENGTH);
1821                         for (i = 0; i < network->rates_ex_len; i++) {
1822                                 network->rates_ex[i] = info_element->data[i];
1823                                 p += snprintf(p, sizeof(rates_str) -
1824                                               (p - rates_str), "%02X ",
1825                                               network->rates_ex[i]);
1826                                 if (rtllib_is_ofdm_rate
1827                                     (info_element->data[i])) {
1828                                         network->flags |= NETWORK_HAS_OFDM;
1829                                         if (info_element->data[i] &
1830                                             RTLLIB_BASIC_RATE_MASK)
1831                                                 network->flags &=
1832                                                     ~NETWORK_HAS_CCK;
1833                                 }
1834                         }
1835
1836                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1837                                              rates_str, network->rates_ex_len);
1838                         break;
1839
1840                 case MFIE_TYPE_DS_SET:
1841                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
1842                                              info_element->data[0]);
1843                         network->channel = info_element->data[0];
1844                         break;
1845
1846                 case MFIE_TYPE_FH_SET:
1847                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
1848                         break;
1849
1850                 case MFIE_TYPE_CF_SET:
1851                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
1852                         break;
1853
1854                 case MFIE_TYPE_TIM:
1855                         if (info_element->len < 4)
1856                                 break;
1857
1858                         network->tim.tim_count = info_element->data[0];
1859                         network->tim.tim_period = info_element->data[1];
1860
1861                         network->dtim_period = info_element->data[1];
1862                         if (ieee->state != RTLLIB_LINKED)
1863                                 break;
1864                         network->last_dtim_sta_time = jiffies;
1865
1866                         network->dtim_data = RTLLIB_DTIM_VALID;
1867
1868
1869                         if (info_element->data[2] & 1)
1870                                 network->dtim_data |= RTLLIB_DTIM_MBCAST;
1871
1872                         offset = (info_element->data[2] >> 1)*2;
1873
1874
1875                         if (ieee->assoc_id < 8*offset ||
1876                             ieee->assoc_id > 8*(offset + info_element->len - 3))
1877                                 break;
1878
1879                         offset = (ieee->assoc_id / 8) - offset;
1880                         if (info_element->data[3 + offset] &
1881                            (1 << (ieee->assoc_id % 8)))
1882                                 network->dtim_data |= RTLLIB_DTIM_UCAST;
1883
1884                         network->listen_interval = network->dtim_period;
1885                         break;
1886
1887                 case MFIE_TYPE_ERP:
1888                         network->erp_value = info_element->data[0];
1889                         network->flags |= NETWORK_HAS_ERP_VALUE;
1890                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1891                                              network->erp_value);
1892                         break;
1893                 case MFIE_TYPE_IBSS_SET:
1894                         network->atim_window = info_element->data[0];
1895                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
1896                                              network->atim_window);
1897                         break;
1898
1899                 case MFIE_TYPE_CHALLENGE:
1900                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
1901                         break;
1902
1903                 case MFIE_TYPE_GENERIC:
1904                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
1905                                              info_element->len);
1906                         if (!rtllib_parse_qos_info_param_IE(info_element,
1907                                                                network))
1908                                 break;
1909                         if (info_element->len >= 4 &&
1910                             info_element->data[0] == 0x00 &&
1911                             info_element->data[1] == 0x50 &&
1912                             info_element->data[2] == 0xf2 &&
1913                             info_element->data[3] == 0x01) {
1914                                 network->wpa_ie_len = min(info_element->len + 2,
1915                                                           MAX_WPA_IE_LEN);
1916                                 memcpy(network->wpa_ie, info_element,
1917                                        network->wpa_ie_len);
1918                                 break;
1919                         }
1920                         if (info_element->len == 7 &&
1921                             info_element->data[0] == 0x00 &&
1922                             info_element->data[1] == 0xe0 &&
1923                             info_element->data[2] == 0x4c &&
1924                             info_element->data[3] == 0x01 &&
1925                             info_element->data[4] == 0x02)
1926                                 network->Turbo_Enable = 1;
1927
1928                         if (tmp_htcap_len == 0) {
1929                                 if (info_element->len >= 4 &&
1930                                    info_element->data[0] == 0x00 &&
1931                                    info_element->data[1] == 0x90 &&
1932                                    info_element->data[2] == 0x4c &&
1933                                    info_element->data[3] == 0x033) {
1934
1935                                         tmp_htcap_len = min_t(u8, info_element->len, MAX_IE_LEN);
1936                                         if (tmp_htcap_len != 0) {
1937                                                 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1938                                                 network->bssht.bdHTCapLen = min_t(u16, tmp_htcap_len, sizeof(network->bssht.bdHTCapBuf));
1939                                                 memcpy(network->bssht.bdHTCapBuf, info_element->data, network->bssht.bdHTCapLen);
1940                                         }
1941                                 }
1942                                 if (tmp_htcap_len != 0) {
1943                                         network->bssht.bdSupportHT = true;
1944                                         network->bssht.bdHT1R = ((((struct ht_capab_ele *)(network->bssht.bdHTCapBuf))->MCS[1]) == 0);
1945                                 } else {
1946                                         network->bssht.bdSupportHT = false;
1947                                         network->bssht.bdHT1R = false;
1948                                 }
1949                         }
1950
1951
1952                         if (tmp_htinfo_len == 0) {
1953                                 if (info_element->len >= 4 &&
1954                                     info_element->data[0] == 0x00 &&
1955                                     info_element->data[1] == 0x90 &&
1956                                     info_element->data[2] == 0x4c &&
1957                                     info_element->data[3] == 0x034) {
1958                                         tmp_htinfo_len = min_t(u8, info_element->len, MAX_IE_LEN);
1959                                         if (tmp_htinfo_len != 0) {
1960                                                 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1961                                                 network->bssht.bdHTInfoLen = min_t(u16, tmp_htinfo_len, sizeof(network->bssht.bdHTInfoBuf));
1962                                                 memcpy(network->bssht.bdHTInfoBuf, info_element->data, network->bssht.bdHTInfoLen);
1963                                         }
1964
1965                                 }
1966                         }
1967
1968                         if (ieee->aggregation) {
1969                                 if (network->bssht.bdSupportHT) {
1970                                         if (info_element->len >= 4 &&
1971                                             info_element->data[0] == 0x00 &&
1972                                             info_element->data[1] == 0xe0 &&
1973                                             info_element->data[2] == 0x4c &&
1974                                             info_element->data[3] == 0x02) {
1975                                                 ht_realtek_agg_len = min_t(u8, info_element->len, MAX_IE_LEN);
1976                                                 memcpy(ht_realtek_agg_buf, info_element->data, info_element->len);
1977                                         }
1978                                         if (ht_realtek_agg_len >= 5) {
1979                                                 network->realtek_cap_exit = true;
1980                                                 network->bssht.bdRT2RTAggregation = true;
1981
1982                                                 if ((ht_realtek_agg_buf[4] == 1) && (ht_realtek_agg_buf[5] & 0x02))
1983                                                         network->bssht.bdRT2RTLongSlotTime = true;
1984
1985                                                 if ((ht_realtek_agg_buf[4] == 1) && (ht_realtek_agg_buf[5] & RT_HT_CAP_USE_92SE))
1986                                                         network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_92SE;
1987                                         }
1988                                 }
1989                                 if (ht_realtek_agg_len >= 5) {
1990                                         if ((ht_realtek_agg_buf[5] & RT_HT_CAP_USE_SOFTAP))
1991                                                 network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_SOFTAP;
1992                                 }
1993                         }
1994
1995                         if ((info_element->len >= 3 &&
1996                              info_element->data[0] == 0x00 &&
1997                              info_element->data[1] == 0x05 &&
1998                              info_element->data[2] == 0xb5) ||
1999                              (info_element->len >= 3 &&
2000                              info_element->data[0] == 0x00 &&
2001                              info_element->data[1] == 0x0a &&
2002                              info_element->data[2] == 0xf7) ||
2003                              (info_element->len >= 3 &&
2004                              info_element->data[0] == 0x00 &&
2005                              info_element->data[1] == 0x10 &&
2006                              info_element->data[2] == 0x18)) {
2007                                 network->broadcom_cap_exist = true;
2008                         }
2009                         if (info_element->len >= 3 &&
2010                             info_element->data[0] == 0x00 &&
2011                             info_element->data[1] == 0x0c &&
2012                             info_element->data[2] == 0x43)
2013                                 network->ralink_cap_exist = true;
2014                         if ((info_element->len >= 3 &&
2015                              info_element->data[0] == 0x00 &&
2016                              info_element->data[1] == 0x03 &&
2017                              info_element->data[2] == 0x7f) ||
2018                              (info_element->len >= 3 &&
2019                              info_element->data[0] == 0x00 &&
2020                              info_element->data[1] == 0x13 &&
2021                              info_element->data[2] == 0x74))
2022                                 network->atheros_cap_exist = true;
2023
2024                         if ((info_element->len >= 3 &&
2025                              info_element->data[0] == 0x00 &&
2026                              info_element->data[1] == 0x50 &&
2027                              info_element->data[2] == 0x43))
2028                                 network->marvell_cap_exist = true;
2029                         if (info_element->len >= 3 &&
2030                             info_element->data[0] == 0x00 &&
2031                             info_element->data[1] == 0x40 &&
2032                             info_element->data[2] == 0x96)
2033                                 network->cisco_cap_exist = true;
2034
2035
2036                         if (info_element->len >= 3 &&
2037                             info_element->data[0] == 0x00 &&
2038                             info_element->data[1] == 0x0a &&
2039                             info_element->data[2] == 0xf5)
2040                                 network->airgo_cap_exist = true;
2041
2042                         if (info_element->len > 4 &&
2043                             info_element->data[0] == 0x00 &&
2044                             info_element->data[1] == 0x40 &&
2045                             info_element->data[2] == 0x96 &&
2046                             info_element->data[3] == 0x01) {
2047                                 if (info_element->len == 6) {
2048                                         memcpy(network->CcxRmState, &info_element[4], 2);
2049                                         if (network->CcxRmState[0] != 0)
2050                                                 network->bCcxRmEnable = true;
2051                                         else
2052                                                 network->bCcxRmEnable = false;
2053                                         network->MBssidMask = network->CcxRmState[1] & 0x07;
2054                                         if (network->MBssidMask != 0) {
2055                                                 network->bMBssidValid = true;
2056                                                 network->MBssidMask = 0xff << (network->MBssidMask);
2057                                                 ether_addr_copy(network->MBssid, network->bssid);
2058                                                 network->MBssid[5] &= network->MBssidMask;
2059                                         } else {
2060                                                 network->bMBssidValid = false;
2061                                         }
2062                                 } else {
2063                                         network->bCcxRmEnable = false;
2064                                 }
2065                         }
2066                         if (info_element->len > 4  &&
2067                             info_element->data[0] == 0x00 &&
2068                             info_element->data[1] == 0x40 &&
2069                             info_element->data[2] == 0x96 &&
2070                             info_element->data[3] == 0x03) {
2071                                 if (info_element->len == 5) {
2072                                         network->bWithCcxVerNum = true;
2073                                         network->BssCcxVerNumber = info_element->data[4];
2074                                 } else {
2075                                         network->bWithCcxVerNum = false;
2076                                         network->BssCcxVerNumber = 0;
2077                                 }
2078                         }
2079                         if (info_element->len > 4  &&
2080                             info_element->data[0] == 0x00 &&
2081                             info_element->data[1] == 0x50 &&
2082                             info_element->data[2] == 0xf2 &&
2083                             info_element->data[3] == 0x04) {
2084                                 RTLLIB_DEBUG_MGMT("MFIE_TYPE_WZC: %d bytes\n",
2085                                                      info_element->len);
2086                                 network->wzc_ie_len = min(info_element->len+2,
2087                                                           MAX_WZC_IE_LEN);
2088                                 memcpy(network->wzc_ie, info_element,
2089                                                 network->wzc_ie_len);
2090                         }
2091                         break;
2092
2093                 case MFIE_TYPE_RSN:
2094                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
2095                                              info_element->len);
2096                         network->rsn_ie_len = min(info_element->len + 2,
2097                                                   MAX_WPA_IE_LEN);
2098                         memcpy(network->rsn_ie, info_element,
2099                                network->rsn_ie_len);
2100                         break;
2101
2102                 case MFIE_TYPE_HT_CAP:
2103                         RTLLIB_DEBUG_SCAN("MFIE_TYPE_HT_CAP: %d bytes\n",
2104                                              info_element->len);
2105                         tmp_htcap_len = min_t(u8, info_element->len, MAX_IE_LEN);
2106                         if (tmp_htcap_len != 0) {
2107                                 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
2108                                 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf) ?
2109                                         sizeof(network->bssht.bdHTCapBuf) : tmp_htcap_len;
2110                                 memcpy(network->bssht.bdHTCapBuf,
2111                                        info_element->data,
2112                                        network->bssht.bdHTCapLen);
2113
2114                                 network->bssht.bdSupportHT = true;
2115                                 network->bssht.bdHT1R = ((((struct ht_capab_ele *)
2116                                                         network->bssht.bdHTCapBuf))->MCS[1]) == 0;
2117
2118                                 network->bssht.bdBandWidth = (enum ht_channel_width)
2119                                                              (((struct ht_capab_ele *)
2120                                                              (network->bssht.bdHTCapBuf))->ChlWidth);
2121                         } else {
2122                                 network->bssht.bdSupportHT = false;
2123                                 network->bssht.bdHT1R = false;
2124                                 network->bssht.bdBandWidth = HT_CHANNEL_WIDTH_20;
2125                         }
2126                         break;
2127
2128
2129                 case MFIE_TYPE_HT_INFO:
2130                         RTLLIB_DEBUG_SCAN("MFIE_TYPE_HT_INFO: %d bytes\n",
2131                                              info_element->len);
2132                         tmp_htinfo_len = min_t(u8, info_element->len, MAX_IE_LEN);
2133                         if (tmp_htinfo_len) {
2134                                 network->bssht.bdHTSpecVer = HT_SPEC_VER_IEEE;
2135                                 network->bssht.bdHTInfoLen = tmp_htinfo_len >
2136                                         sizeof(network->bssht.bdHTInfoBuf) ?
2137                                         sizeof(network->bssht.bdHTInfoBuf) :
2138                                         tmp_htinfo_len;
2139                                 memcpy(network->bssht.bdHTInfoBuf,
2140                                        info_element->data,
2141                                        network->bssht.bdHTInfoLen);
2142                         }
2143                         break;
2144
2145                 case MFIE_TYPE_AIRONET:
2146                         RTLLIB_DEBUG_SCAN("MFIE_TYPE_AIRONET: %d bytes\n",
2147                                              info_element->len);
2148                         if (info_element->len > IE_CISCO_FLAG_POSITION) {
2149                                 network->bWithAironetIE = true;
2150
2151                                 if ((info_element->data[IE_CISCO_FLAG_POSITION]
2152                                      & SUPPORT_CKIP_MIC) ||
2153                                      (info_element->data[IE_CISCO_FLAG_POSITION]
2154                                      & SUPPORT_CKIP_PK))
2155                                         network->bCkipSupported = true;
2156                                 else
2157                                         network->bCkipSupported = false;
2158                         } else {
2159                                 network->bWithAironetIE = false;
2160                                 network->bCkipSupported = false;
2161                         }
2162                         break;
2163                 case MFIE_TYPE_QOS_PARAMETER:
2164                         netdev_err(ieee->dev,
2165                                    "QoS Error need to parse QOS_PARAMETER IE\n");
2166                         break;
2167
2168                 case MFIE_TYPE_COUNTRY:
2169                         RTLLIB_DEBUG_SCAN("MFIE_TYPE_COUNTRY: %d bytes\n",
2170                                              info_element->len);
2171                         rtllib_extract_country_ie(ieee, info_element, network,
2172                                                   network->bssid);
2173                         break;
2174 /* TODO */
2175                 default:
2176                         RTLLIB_DEBUG_MGMT
2177                             ("Unsupported info element: %s (%d)\n",
2178                              get_info_element_string(info_element->id),
2179                              info_element->id);
2180                         break;
2181                 }
2182
2183                 length -= sizeof(*info_element) + info_element->len;
2184                 info_element =
2185                     (struct rtllib_info_element *)&info_element->
2186                     data[info_element->len];
2187         }
2188
2189         if (!network->atheros_cap_exist && !network->broadcom_cap_exist &&
2190             !network->cisco_cap_exist && !network->ralink_cap_exist &&
2191             !network->bssht.bdRT2RTAggregation)
2192                 network->unknown_cap_exist = true;
2193         else
2194                 network->unknown_cap_exist = false;
2195         return 0;
2196 }
2197
2198 static long rtllib_translate_todbm(u8 signal_strength_index)
2199 {
2200         long    signal_power;
2201
2202         signal_power = (long)((signal_strength_index + 1) >> 1);
2203         signal_power -= 95;
2204
2205         return signal_power;
2206 }
2207
2208 static inline int rtllib_network_init(
2209         struct rtllib_device *ieee,
2210         struct rtllib_probe_response *beacon,
2211         struct rtllib_network *network,
2212         struct rtllib_rx_stats *stats)
2213 {
2214         memset(&network->qos_data, 0, sizeof(struct rtllib_qos_data));
2215
2216         /* Pull out fixed field data */
2217         ether_addr_copy(network->bssid, beacon->header.addr3);
2218         network->capability = le16_to_cpu(beacon->capability);
2219         network->last_scanned = jiffies;
2220         network->time_stamp[0] = beacon->time_stamp[0];
2221         network->time_stamp[1] = beacon->time_stamp[1];
2222         network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
2223         /* Where to pull this? beacon->listen_interval;*/
2224         network->listen_interval = 0x0A;
2225         network->rates_len = network->rates_ex_len = 0;
2226         network->last_associate = 0;
2227         network->ssid_len = 0;
2228         network->hidden_ssid_len = 0;
2229         memset(network->hidden_ssid, 0, sizeof(network->hidden_ssid));
2230         network->flags = 0;
2231         network->atim_window = 0;
2232         network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
2233             0x3 : 0x0;
2234         network->berp_info_valid = false;
2235         network->broadcom_cap_exist = false;
2236         network->ralink_cap_exist = false;
2237         network->atheros_cap_exist = false;
2238         network->cisco_cap_exist = false;
2239         network->unknown_cap_exist = false;
2240         network->realtek_cap_exit = false;
2241         network->marvell_cap_exist = false;
2242         network->airgo_cap_exist = false;
2243         network->Turbo_Enable = 0;
2244         network->SignalStrength = stats->SignalStrength;
2245         network->RSSI = stats->SignalStrength;
2246         network->CountryIeLen = 0;
2247         memset(network->CountryIeBuf, 0, MAX_IE_LEN);
2248         HTInitializeBssDesc(&network->bssht);
2249         if (stats->freq == RTLLIB_52GHZ_BAND) {
2250                 /* for A band (No DS info) */
2251                 network->channel = stats->received_channel;
2252         } else
2253                 network->flags |= NETWORK_HAS_CCK;
2254
2255         network->wpa_ie_len = 0;
2256         network->rsn_ie_len = 0;
2257         network->wzc_ie_len = 0;
2258
2259         if (rtllib_parse_info_param(ieee,
2260                         beacon->info_element,
2261                         (stats->len - sizeof(*beacon)),
2262                         network,
2263                         stats))
2264                 return 1;
2265
2266         network->mode = 0;
2267         if (stats->freq == RTLLIB_52GHZ_BAND)
2268                 network->mode = IEEE_A;
2269         else {
2270                 if (network->flags & NETWORK_HAS_OFDM)
2271                         network->mode |= IEEE_G;
2272                 if (network->flags & NETWORK_HAS_CCK)
2273                         network->mode |= IEEE_B;
2274         }
2275
2276         if (network->mode == 0) {
2277                 RTLLIB_DEBUG_SCAN("Filtered out '%s (%pM)' network.\n",
2278                                      escape_essid(network->ssid,
2279                                                   network->ssid_len),
2280                                      network->bssid);
2281                 return 1;
2282         }
2283
2284         if (network->bssht.bdSupportHT) {
2285                 if (network->mode == IEEE_A)
2286                         network->mode = IEEE_N_5G;
2287                 else if (network->mode & (IEEE_G | IEEE_B))
2288                         network->mode = IEEE_N_24G;
2289         }
2290         if (rtllib_is_empty_essid(network->ssid, network->ssid_len))
2291                 network->flags |= NETWORK_EMPTY_ESSID;
2292         stats->signal = 30 + (stats->SignalStrength * 70) / 100;
2293         stats->noise = rtllib_translate_todbm((u8)(100-stats->signal)) - 25;
2294
2295         memcpy(&network->stats, stats, sizeof(network->stats));
2296
2297         return 0;
2298 }
2299
2300 static inline int is_same_network(struct rtllib_network *src,
2301                                   struct rtllib_network *dst, u8 ssidbroad)
2302 {
2303         /* A network is only a duplicate if the channel, BSSID, ESSID
2304          * and the capability field (in particular IBSS and BSS) all match.
2305          * We treat all <hidden> with the same BSSID and channel
2306          * as one network
2307          */
2308         return (((src->ssid_len == dst->ssid_len) || (!ssidbroad)) &&
2309                 (src->channel == dst->channel) &&
2310                 !memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
2311                 (!memcmp(src->ssid, dst->ssid, src->ssid_len) ||
2312                 (!ssidbroad)) &&
2313                 ((src->capability & WLAN_CAPABILITY_IBSS) ==
2314                 (dst->capability & WLAN_CAPABILITY_IBSS)) &&
2315                 ((src->capability & WLAN_CAPABILITY_ESS) ==
2316                 (dst->capability & WLAN_CAPABILITY_ESS)));
2317 }
2318
2319
2320 static inline void update_network(struct rtllib_network *dst,
2321                                   struct rtllib_network *src)
2322 {
2323         int qos_active;
2324         u8 old_param;
2325
2326         memcpy(&dst->stats, &src->stats, sizeof(struct rtllib_rx_stats));
2327         dst->capability = src->capability;
2328         memcpy(dst->rates, src->rates, src->rates_len);
2329         dst->rates_len = src->rates_len;
2330         memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
2331         dst->rates_ex_len = src->rates_ex_len;
2332         if (src->ssid_len > 0) {
2333                 if (dst->ssid_len == 0) {
2334                         memset(dst->hidden_ssid, 0, sizeof(dst->hidden_ssid));
2335                         dst->hidden_ssid_len = src->ssid_len;
2336                         memcpy(dst->hidden_ssid, src->ssid, src->ssid_len);
2337                 } else {
2338                         memset(dst->ssid, 0, dst->ssid_len);
2339                         dst->ssid_len = src->ssid_len;
2340                         memcpy(dst->ssid, src->ssid, src->ssid_len);
2341                 }
2342         }
2343         dst->mode = src->mode;
2344         dst->flags = src->flags;
2345         dst->time_stamp[0] = src->time_stamp[0];
2346         dst->time_stamp[1] = src->time_stamp[1];
2347         if (src->flags & NETWORK_HAS_ERP_VALUE) {
2348                 dst->erp_value = src->erp_value;
2349                 dst->berp_info_valid = src->berp_info_valid = true;
2350         }
2351         dst->beacon_interval = src->beacon_interval;
2352         dst->listen_interval = src->listen_interval;
2353         dst->atim_window = src->atim_window;
2354         dst->dtim_period = src->dtim_period;
2355         dst->dtim_data = src->dtim_data;
2356         dst->last_dtim_sta_time = src->last_dtim_sta_time;
2357         memcpy(&dst->tim, &src->tim, sizeof(struct rtllib_tim_parameters));
2358
2359         dst->bssht.bdSupportHT = src->bssht.bdSupportHT;
2360         dst->bssht.bdRT2RTAggregation = src->bssht.bdRT2RTAggregation;
2361         dst->bssht.bdHTCapLen = src->bssht.bdHTCapLen;
2362         memcpy(dst->bssht.bdHTCapBuf, src->bssht.bdHTCapBuf,
2363                src->bssht.bdHTCapLen);
2364         dst->bssht.bdHTInfoLen = src->bssht.bdHTInfoLen;
2365         memcpy(dst->bssht.bdHTInfoBuf, src->bssht.bdHTInfoBuf,
2366                src->bssht.bdHTInfoLen);
2367         dst->bssht.bdHTSpecVer = src->bssht.bdHTSpecVer;
2368         dst->bssht.bdRT2RTLongSlotTime = src->bssht.bdRT2RTLongSlotTime;
2369         dst->broadcom_cap_exist = src->broadcom_cap_exist;
2370         dst->ralink_cap_exist = src->ralink_cap_exist;
2371         dst->atheros_cap_exist = src->atheros_cap_exist;
2372         dst->realtek_cap_exit = src->realtek_cap_exit;
2373         dst->marvell_cap_exist = src->marvell_cap_exist;
2374         dst->cisco_cap_exist = src->cisco_cap_exist;
2375         dst->airgo_cap_exist = src->airgo_cap_exist;
2376         dst->unknown_cap_exist = src->unknown_cap_exist;
2377         memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
2378         dst->wpa_ie_len = src->wpa_ie_len;
2379         memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
2380         dst->rsn_ie_len = src->rsn_ie_len;
2381         memcpy(dst->wzc_ie, src->wzc_ie, src->wzc_ie_len);
2382         dst->wzc_ie_len = src->wzc_ie_len;
2383
2384         dst->last_scanned = jiffies;
2385         /* qos related parameters */
2386         qos_active = dst->qos_data.active;
2387         old_param = dst->qos_data.param_count;
2388         dst->qos_data.supported = src->qos_data.supported;
2389         if (dst->flags & NETWORK_HAS_QOS_PARAMETERS)
2390                 memcpy(&dst->qos_data, &src->qos_data,
2391                        sizeof(struct rtllib_qos_data));
2392         if (dst->qos_data.supported == 1) {
2393                 if (dst->ssid_len)
2394                         RTLLIB_DEBUG_QOS
2395                                 ("QoS the network %s is QoS supported\n",
2396                                 dst->ssid);
2397                 else
2398                         RTLLIB_DEBUG_QOS
2399                                 ("QoS the network is QoS supported\n");
2400         }
2401         dst->qos_data.active = qos_active;
2402         dst->qos_data.old_param_count = old_param;
2403
2404         /* dst->last_associate is not overwritten */
2405         dst->wmm_info = src->wmm_info;
2406         if (src->wmm_param[0].ac_aci_acm_aifsn ||
2407            src->wmm_param[1].ac_aci_acm_aifsn ||
2408            src->wmm_param[2].ac_aci_acm_aifsn ||
2409            src->wmm_param[3].ac_aci_acm_aifsn)
2410                 memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN);
2411
2412         dst->SignalStrength = src->SignalStrength;
2413         dst->RSSI = src->RSSI;
2414         dst->Turbo_Enable = src->Turbo_Enable;
2415
2416         dst->CountryIeLen = src->CountryIeLen;
2417         memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen);
2418
2419         dst->bWithAironetIE = src->bWithAironetIE;
2420         dst->bCkipSupported = src->bCkipSupported;
2421         memcpy(dst->CcxRmState, src->CcxRmState, 2);
2422         dst->bCcxRmEnable = src->bCcxRmEnable;
2423         dst->MBssidMask = src->MBssidMask;
2424         dst->bMBssidValid = src->bMBssidValid;
2425         memcpy(dst->MBssid, src->MBssid, 6);
2426         dst->bWithCcxVerNum = src->bWithCcxVerNum;
2427         dst->BssCcxVerNumber = src->BssCcxVerNumber;
2428 }
2429
2430 static inline int is_beacon(__le16 fc)
2431 {
2432         return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == RTLLIB_STYPE_BEACON);
2433 }
2434
2435 static int IsPassiveChannel(struct rtllib_device *rtllib, u8 channel)
2436 {
2437         if (MAX_CHANNEL_NUMBER < channel) {
2438                 netdev_info(rtllib->dev, "%s(): Invalid Channel\n", __func__);
2439                 return 0;
2440         }
2441
2442         if (rtllib->active_channel_map[channel] == 2)
2443                 return 1;
2444
2445         return 0;
2446 }
2447
2448 int rtllib_legal_channel(struct rtllib_device *rtllib, u8 channel)
2449 {
2450         if (MAX_CHANNEL_NUMBER < channel) {
2451                 netdev_info(rtllib->dev, "%s(): Invalid Channel\n", __func__);
2452                 return 0;
2453         }
2454         if (rtllib->active_channel_map[channel] > 0)
2455                 return 1;
2456
2457         return 0;
2458 }
2459 EXPORT_SYMBOL(rtllib_legal_channel);
2460
2461 static inline void rtllib_process_probe_response(
2462         struct rtllib_device *ieee,
2463         struct rtllib_probe_response *beacon,
2464         struct rtllib_rx_stats *stats)
2465 {
2466         struct rtllib_network *target;
2467         struct rtllib_network *oldest = NULL;
2468         struct rtllib_info_element *info_element = &beacon->info_element[0];
2469         unsigned long flags;
2470         short renew;
2471         struct rtllib_network *network = kzalloc(sizeof(struct rtllib_network),
2472                                                  GFP_ATOMIC);
2473
2474         if (!network)
2475                 return;
2476
2477         RTLLIB_DEBUG_SCAN(
2478                 "'%s' ( %pM ): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
2479                 escape_essid(info_element->data, info_element->len),
2480                 beacon->header.addr3,
2481                 (le16_to_cpu(beacon->capability) & (1<<0xf)) ? '1' : '0',
2482                 (le16_to_cpu(beacon->capability) & (1<<0xe)) ? '1' : '0',
2483                 (le16_to_cpu(beacon->capability) & (1<<0xd)) ? '1' : '0',
2484                 (le16_to_cpu(beacon->capability) & (1<<0xc)) ? '1' : '0',
2485                 (le16_to_cpu(beacon->capability) & (1<<0xb)) ? '1' : '0',
2486                 (le16_to_cpu(beacon->capability) & (1<<0xa)) ? '1' : '0',
2487                 (le16_to_cpu(beacon->capability) & (1<<0x9)) ? '1' : '0',
2488                 (le16_to_cpu(beacon->capability) & (1<<0x8)) ? '1' : '0',
2489                 (le16_to_cpu(beacon->capability) & (1<<0x7)) ? '1' : '0',
2490                 (le16_to_cpu(beacon->capability) & (1<<0x6)) ? '1' : '0',
2491                 (le16_to_cpu(beacon->capability) & (1<<0x5)) ? '1' : '0',
2492                 (le16_to_cpu(beacon->capability) & (1<<0x4)) ? '1' : '0',
2493                 (le16_to_cpu(beacon->capability) & (1<<0x3)) ? '1' : '0',
2494                 (le16_to_cpu(beacon->capability) & (1<<0x2)) ? '1' : '0',
2495                 (le16_to_cpu(beacon->capability) & (1<<0x1)) ? '1' : '0',
2496                 (le16_to_cpu(beacon->capability) & (1<<0x0)) ? '1' : '0');
2497
2498         if (rtllib_network_init(ieee, beacon, network, stats)) {
2499                 RTLLIB_DEBUG_SCAN("Dropped '%s' ( %pM) via %s.\n",
2500                                   escape_essid(info_element->data,
2501                                   info_element->len),
2502                                   beacon->header.addr3,
2503                                   WLAN_FC_GET_STYPE(
2504                                           le16_to_cpu(beacon->header.frame_ctl)) ==
2505                                   RTLLIB_STYPE_PROBE_RESP ?
2506                                   "PROBE RESPONSE" : "BEACON");
2507                 goto free_network;
2508         }
2509
2510
2511         if (!rtllib_legal_channel(ieee, network->channel))
2512                 goto free_network;
2513
2514         if (WLAN_FC_GET_STYPE(le16_to_cpu(beacon->header.frame_ctl)) ==
2515             RTLLIB_STYPE_PROBE_RESP) {
2516                 if (IsPassiveChannel(ieee, network->channel)) {
2517                         netdev_info(ieee->dev,
2518                                     "GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n",
2519                                     network->channel);
2520                         goto free_network;
2521                 }
2522         }
2523
2524         /* The network parsed correctly -- so now we scan our known networks
2525          * to see if we can find it in our list.
2526          *
2527          * NOTE:  This search is definitely not optimized.  Once its doing
2528          *      the "right thing" we'll optimize it for efficiency if
2529          *      necessary
2530          */
2531
2532         /* Search for this entry in the list and update it if it is
2533          * already there.
2534          */
2535
2536         spin_lock_irqsave(&ieee->lock, flags);
2537         if (is_same_network(&ieee->current_network, network,
2538            (network->ssid_len ? 1 : 0))) {
2539                 update_network(&ieee->current_network, network);
2540                 if ((ieee->current_network.mode == IEEE_N_24G ||
2541                      ieee->current_network.mode == IEEE_G)
2542                      && ieee->current_network.berp_info_valid) {
2543                         if (ieee->current_network.erp_value & ERP_UseProtection)
2544                                 ieee->current_network.buseprotection = true;
2545                         else
2546                                 ieee->current_network.buseprotection = false;
2547                 }
2548                 if (is_beacon(beacon->header.frame_ctl)) {
2549                         if (ieee->state >= RTLLIB_LINKED)
2550                                 ieee->LinkDetectInfo.NumRecvBcnInPeriod++;
2551                 }
2552         }
2553         list_for_each_entry(target, &ieee->network_list, list) {
2554                 if (is_same_network(target, network,
2555                    (target->ssid_len ? 1 : 0)))
2556                         break;
2557                 if ((oldest == NULL) ||
2558                     (target->last_scanned < oldest->last_scanned))
2559                         oldest = target;
2560         }
2561
2562         /* If we didn't find a match, then get a new network slot to initialize
2563          * with this beacon's information
2564          */
2565         if (&target->list == &ieee->network_list) {
2566                 if (list_empty(&ieee->network_free_list)) {
2567                         /* If there are no more slots, expire the oldest */
2568                         list_del(&oldest->list);
2569                         target = oldest;
2570                         RTLLIB_DEBUG_SCAN("Expired '%s' ( %pM) from network list.\n",
2571                                              escape_essid(target->ssid,
2572                                                           target->ssid_len),
2573                                              target->bssid);
2574                 } else {
2575                         /* Otherwise just pull from the free list */
2576                         target = list_entry(ieee->network_free_list.next,
2577                                             struct rtllib_network, list);
2578                         list_del(ieee->network_free_list.next);
2579                 }
2580
2581
2582                 RTLLIB_DEBUG_SCAN("Adding '%s' ( %pM) via %s.\n",
2583                                   escape_essid(network->ssid,
2584                                   network->ssid_len), network->bssid,
2585                                   WLAN_FC_GET_STYPE(
2586                                           le16_to_cpu(beacon->header.frame_ctl)) ==
2587                                   RTLLIB_STYPE_PROBE_RESP ?
2588                                   "PROBE RESPONSE" : "BEACON");
2589                 memcpy(target, network, sizeof(*target));
2590                 list_add_tail(&target->list, &ieee->network_list);
2591                 if (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)
2592                         rtllib_softmac_new_net(ieee, network);
2593         } else {
2594                 RTLLIB_DEBUG_SCAN("Updating '%s' ( %pM) via %s.\n",
2595                                   escape_essid(target->ssid,
2596                                   target->ssid_len), target->bssid,
2597                                   WLAN_FC_GET_STYPE(
2598                                           le16_to_cpu(beacon->header.frame_ctl)) ==
2599                                   RTLLIB_STYPE_PROBE_RESP ?
2600                                   "PROBE RESPONSE" : "BEACON");
2601
2602                 /* we have an entry and we are going to update it. But this
2603                  *  entry may be already expired. In this case we do the same
2604                  * as we found a new net and call the new_net handler
2605                  */
2606                 renew = !time_after(target->last_scanned + ieee->scan_age,
2607                                     jiffies);
2608                 if ((!target->ssid_len) &&
2609                     (((network->ssid_len > 0) && (target->hidden_ssid_len == 0))
2610                     || ((ieee->current_network.ssid_len == network->ssid_len) &&
2611                     (strncmp(ieee->current_network.ssid, network->ssid,
2612                     network->ssid_len) == 0) &&
2613                     (ieee->state == RTLLIB_NOLINK))))
2614                         renew = 1;
2615                 update_network(target, network);
2616                 if (renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE))
2617                         rtllib_softmac_new_net(ieee, network);
2618         }
2619
2620         spin_unlock_irqrestore(&ieee->lock, flags);
2621         if (is_beacon(beacon->header.frame_ctl) &&
2622             is_same_network(&ieee->current_network, network,
2623             (network->ssid_len ? 1 : 0)) &&
2624             (ieee->state == RTLLIB_LINKED)) {
2625                 if (ieee->handle_beacon != NULL)
2626                         ieee->handle_beacon(ieee->dev, beacon,
2627                                             &ieee->current_network);
2628         }
2629 free_network:
2630         kfree(network);
2631 }
2632
2633 void rtllib_rx_mgt(struct rtllib_device *ieee,
2634                       struct sk_buff *skb,
2635                       struct rtllib_rx_stats *stats)
2636 {
2637         struct rtllib_hdr_4addr *header = (struct rtllib_hdr_4addr *)skb->data;
2638
2639         if ((WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)) !=
2640             RTLLIB_STYPE_PROBE_RESP) &&
2641             (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)) !=
2642             RTLLIB_STYPE_BEACON))
2643                 ieee->last_rx_ps_time = jiffies;
2644
2645         switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
2646
2647         case RTLLIB_STYPE_BEACON:
2648                 RTLLIB_DEBUG_MGMT("received BEACON (%d)\n",
2649                                   WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
2650                 RTLLIB_DEBUG_SCAN("Beacon\n");
2651                 rtllib_process_probe_response(
2652                                 ieee, (struct rtllib_probe_response *)header,
2653                                 stats);
2654
2655                 if (ieee->sta_sleep || (ieee->ps != RTLLIB_PS_DISABLED &&
2656                     ieee->iw_mode == IW_MODE_INFRA &&
2657                     ieee->state == RTLLIB_LINKED))
2658                         tasklet_schedule(&ieee->ps_task);
2659
2660                 break;
2661
2662         case RTLLIB_STYPE_PROBE_RESP:
2663                 RTLLIB_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
2664                         WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
2665                 RTLLIB_DEBUG_SCAN("Probe response\n");
2666                 rtllib_process_probe_response(ieee,
2667                               (struct rtllib_probe_response *)header, stats);
2668                 break;
2669         case RTLLIB_STYPE_PROBE_REQ:
2670                 RTLLIB_DEBUG_MGMT("received PROBE RESQUEST (%d)\n",
2671                                   WLAN_FC_GET_STYPE(
2672                                           le16_to_cpu(header->frame_ctl)));
2673                 RTLLIB_DEBUG_SCAN("Probe request\n");
2674                 if ((ieee->softmac_features & IEEE_SOFTMAC_PROBERS) &&
2675                     ((ieee->iw_mode == IW_MODE_ADHOC ||
2676                     ieee->iw_mode == IW_MODE_MASTER) &&
2677                     ieee->state == RTLLIB_LINKED))
2678                         rtllib_rx_probe_rq(ieee, skb);
2679                 break;
2680         }
2681 }