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                 memcpy(entry->src_addr, hdr->addr2, ETH_ALEN);
 143                 memcpy(entry->dst_addr, hdr->addr1, ETH_ALEN);
 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                         memcpy(entry->mac, mac, ETH_ALEN);
 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                 memcpy(dst, hdr->addr1, ETH_ALEN);
 931                 memcpy(src, hdr->addr3, ETH_ALEN);
 932                 memcpy(bssid, hdr->addr2, ETH_ALEN);
 933                 break;
 934         case RTLLIB_FCTL_TODS:
 935                 memcpy(dst, hdr->addr3, ETH_ALEN);
 936                 memcpy(src, hdr->addr2, ETH_ALEN);
 937                 memcpy(bssid, hdr->addr1, ETH_ALEN);
 938                 break;
 939         case RTLLIB_FCTL_FROMDS | RTLLIB_FCTL_TODS:
 940                 memcpy(dst, hdr->addr3, ETH_ALEN);
 941                 memcpy(src, hdr->addr4, ETH_ALEN);
 942                 memcpy(bssid, ieee->current_network.bssid, ETH_ALEN);
 943                 break;
 944         case 0:
 945                 memcpy(dst, hdr->addr1, ETH_ALEN);
 946                 memcpy(src, hdr->addr2, ETH_ALEN);
 947                 memcpy(bssid, hdr->addr3, ETH_ALEN);
 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                                 memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
1222                                 memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
1223                         } else {
1224                                 u16 len;
1225                                 /* Leave Ethernet header part of hdr and full payload */
1226                                 len = sub_skb->len;
1227                                 memcpy(skb_push(sub_skb, 2), &len, 2);
1228                                 memcpy(skb_push(sub_skb, ETH_ALEN), src, ETH_ALEN);
1229                                 memcpy(skb_push(sub_skb, ETH_ALEN), dst, ETH_ALEN);
1230                         }
1231
1232                         ieee->stats.rx_packets++;
1233                         ieee->stats.rx_bytes += sub_skb->len;
1234
1235                         if (is_multicast_ether_addr(dst))
1236                                 ieee->stats.multicast++;
1237
1238                         /* Indicate the packets to upper layer */
1239                         memset(sub_skb->cb, 0, sizeof(sub_skb->cb));
1240                         sub_skb->protocol = eth_type_trans(sub_skb, dev);
1241                         sub_skb->dev = dev;
1242                         sub_skb->dev->stats.rx_packets++;
1243                         sub_skb->dev->stats.rx_bytes += sub_skb->len;
1244                         sub_skb->ip_summed = CHECKSUM_NONE; /* 802.11 crc not sufficient */
1245                         netif_rx(sub_skb);
1246                 }
1247         }
1248         kfree(rxb);
1249 }
1250
1251 static int rtllib_rx_InfraAdhoc(struct rtllib_device *ieee, struct sk_buff *skb,
1252                  struct rtllib_rx_stats *rx_stats)
1253 {
1254         struct net_device *dev = ieee->dev;
1255         struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1256         struct lib80211_crypt_data *crypt = NULL;
1257         struct rtllib_rxb *rxb = NULL;
1258         struct rx_ts_record *pTS = NULL;
1259         u16 fc, sc, SeqNum = 0;
1260         u8 type, stype, multicast = 0, unicast = 0, nr_subframes = 0, TID = 0;
1261         u8 *payload;
1262         u8 dst[ETH_ALEN];
1263         u8 src[ETH_ALEN];
1264         u8 bssid[ETH_ALEN] = {0};
1265
1266         size_t hdrlen = 0;
1267         bool bToOtherSTA = false;
1268         int ret = 0, i = 0;
1269
1270         hdr = (struct rtllib_hdr_4addr *)skb->data;
1271         fc = le16_to_cpu(hdr->frame_ctl);
1272         type = WLAN_FC_GET_TYPE(fc);
1273         stype = WLAN_FC_GET_STYPE(fc);
1274         sc = le16_to_cpu(hdr->seq_ctl);
1275
1276         /*Filter pkt not to me*/
1277         multicast = is_multicast_ether_addr(hdr->addr1);
1278         unicast = !multicast;
1279         if (unicast && !ether_addr_equal(dev->dev_addr, hdr->addr1)) {
1280                 if (ieee->bNetPromiscuousMode)
1281                         bToOtherSTA = true;
1282                 else
1283                         goto rx_dropped;
1284         }
1285
1286         /*Filter pkt has too small length */
1287         hdrlen = rtllib_rx_get_hdrlen(ieee, skb, rx_stats);
1288         if (skb->len < hdrlen) {
1289                 netdev_info(dev, "%s():ERR!!! skb->len is smaller than hdrlen\n",
1290                             __func__);
1291                 goto rx_dropped;
1292         }
1293
1294         /* Filter Duplicate pkt */
1295         ret = rtllib_rx_check_duplicate(ieee, skb, multicast);
1296         if (ret < 0)
1297                 goto rx_dropped;
1298
1299         /* Filter CTRL Frame */
1300         if (type == RTLLIB_FTYPE_CTL)
1301                 goto rx_dropped;
1302
1303         /* Filter MGNT Frame */
1304         if (type == RTLLIB_FTYPE_MGMT) {
1305                 if (bToOtherSTA)
1306                         goto rx_dropped;
1307                 if (rtllib_rx_frame_mgmt(ieee, skb, rx_stats, type, stype))
1308                         goto rx_dropped;
1309                 else
1310                         goto rx_exit;
1311         }
1312
1313         /* Filter WAPI DATA Frame */
1314
1315         /* Update statstics for AP roaming */
1316         if (!bToOtherSTA) {
1317                 ieee->LinkDetectInfo.NumRecvDataInPeriod++;
1318                 ieee->LinkDetectInfo.NumRxOkInPeriod++;
1319         }
1320         dev->last_rx = jiffies;
1321
1322         /* Data frame - extract src/dst addresses */
1323         rtllib_rx_extract_addr(ieee, hdr, dst, src, bssid);
1324
1325         /* Filter Data frames */
1326         ret = rtllib_rx_data_filter(ieee, fc, dst, src, bssid, hdr->addr2);
1327         if (ret < 0)
1328                 goto rx_dropped;
1329
1330         if (skb->len == hdrlen)
1331                 goto rx_dropped;
1332
1333         /* Send pspoll based on moredata */
1334         if ((ieee->iw_mode == IW_MODE_INFRA)  && (ieee->sta_sleep == LPS_IS_SLEEP)
1335                 && (ieee->polling) && (!bToOtherSTA)) {
1336                 if (WLAN_FC_MORE_DATA(fc)) {
1337                         /* more data bit is set, let's request a new frame from the AP */
1338                         rtllib_sta_ps_send_pspoll_frame(ieee);
1339                 } else {
1340                         ieee->polling =  false;
1341                 }
1342         }
1343
1344         /* Get crypt if encrypted */
1345         ret = rtllib_rx_get_crypt(ieee, skb, &crypt, hdrlen);
1346         if (ret == -1)
1347                 goto rx_dropped;
1348
1349         /* Decrypt data frame (including reassemble) */
1350         ret = rtllib_rx_decrypt(ieee, skb, rx_stats, crypt, hdrlen);
1351         if (ret == -1)
1352                 goto rx_dropped;
1353         else if (ret == -2)
1354                 goto rx_exit;
1355
1356         /* Get TS for Rx Reorder  */
1357         hdr = (struct rtllib_hdr_4addr *) skb->data;
1358         if (ieee->current_network.qos_data.active && IsQoSDataFrame(skb->data)
1359                 && !is_multicast_ether_addr(hdr->addr1)
1360                 && (!bToOtherSTA)) {
1361                 TID = Frame_QoSTID(skb->data);
1362                 SeqNum = WLAN_GET_SEQ_SEQ(sc);
1363                 GetTs(ieee, (struct ts_common_info **) &pTS, hdr->addr2, TID, RX_DIR, true);
1364                 if (TID != 0 && TID != 3)
1365                         ieee->bis_any_nonbepkts = true;
1366         }
1367
1368         /* Parse rx data frame (For AMSDU) */
1369         /* skb: hdr + (possible reassembled) full plaintext payload */
1370         payload = skb->data + hdrlen;
1371         rxb = kmalloc(sizeof(struct rtllib_rxb), GFP_ATOMIC);
1372         if (rxb == NULL)
1373                 goto rx_dropped;
1374
1375         /* to parse amsdu packets */
1376         /* qos data packets & reserved bit is 1 */
1377         if (parse_subframe(ieee, skb, rx_stats, rxb, src, dst) == 0) {
1378                 /* only to free rxb, and not submit the packets to upper layer */
1379                 for (i = 0; i < rxb->nr_subframes; i++)
1380                         dev_kfree_skb(rxb->subframes[i]);
1381                 kfree(rxb);
1382                 rxb = NULL;
1383                 goto rx_dropped;
1384         }
1385
1386         /* Update WAPI PN */
1387
1388         /* Check if leave LPS */
1389         if (!bToOtherSTA) {
1390                 if (ieee->bIsAggregateFrame)
1391                         nr_subframes = rxb->nr_subframes;
1392                 else
1393                         nr_subframes = 1;
1394                 if (unicast)
1395                         ieee->LinkDetectInfo.NumRxUnicastOkInPeriod += nr_subframes;
1396                 rtllib_rx_check_leave_lps(ieee, unicast, nr_subframes);
1397         }
1398
1399         /* Indicate packets to upper layer or Rx Reorder */
1400         if (ieee->pHTInfo->bCurRxReorderEnable == false || pTS == NULL || bToOtherSTA)
1401                 rtllib_rx_indicate_pkt_legacy(ieee, rx_stats, rxb, dst, src);
1402         else
1403                 RxReorderIndicatePacket(ieee, rxb, pTS, SeqNum);
1404
1405         dev_kfree_skb(skb);
1406
1407  rx_exit:
1408         return 1;
1409
1410  rx_dropped:
1411         ieee->stats.rx_dropped++;
1412
1413         /* Returning 0 indicates to caller that we have not handled the SKB--
1414          * so it is still allocated and can be used again by underlying
1415          * hardware as a DMA target
1416          */
1417         return 0;
1418 }
1419
1420 static int rtllib_rx_Master(struct rtllib_device *ieee, struct sk_buff *skb,
1421                  struct rtllib_rx_stats *rx_stats)
1422 {
1423         return 0;
1424 }
1425
1426 static int rtllib_rx_Monitor(struct rtllib_device *ieee, struct sk_buff *skb,
1427                  struct rtllib_rx_stats *rx_stats)
1428 {
1429         struct rtllib_hdr_4addr *hdr = (struct rtllib_hdr_4addr *)skb->data;
1430         u16 fc = le16_to_cpu(hdr->frame_ctl);
1431         size_t hdrlen = rtllib_get_hdrlen(fc);
1432
1433         if (skb->len < hdrlen) {
1434                 netdev_info(ieee->dev,
1435                             "%s():ERR!!! skb->len is smaller than hdrlen\n",
1436                             __func__);
1437                 return 0;
1438         }
1439
1440         if (HTCCheck(ieee, skb->data)) {
1441                 if (net_ratelimit())
1442                         netdev_info(ieee->dev, "%s: Find HTCControl!\n",
1443                                     __func__);
1444                 hdrlen += 4;
1445         }
1446
1447         rtllib_monitor_rx(ieee, skb, rx_stats, hdrlen);
1448         ieee->stats.rx_packets++;
1449         ieee->stats.rx_bytes += skb->len;
1450
1451         return 1;
1452 }
1453
1454 static int rtllib_rx_Mesh(struct rtllib_device *ieee, struct sk_buff *skb,
1455                  struct rtllib_rx_stats *rx_stats)
1456 {
1457         return 0;
1458 }
1459
1460 /* All received frames are sent to this function. @skb contains the frame in
1461  * IEEE 802.11 format, i.e., in the format it was sent over air.
1462  * This function is called only as a tasklet (software IRQ).
1463  */
1464 int rtllib_rx(struct rtllib_device *ieee, struct sk_buff *skb,
1465                  struct rtllib_rx_stats *rx_stats)
1466 {
1467         int ret = 0;
1468
1469         if ((NULL == ieee) || (NULL == skb) || (NULL == rx_stats)) {
1470                 pr_info("%s: Input parameters NULL!\n", __func__);
1471                 goto rx_dropped;
1472         }
1473         if (skb->len < 10) {
1474                 netdev_info(ieee->dev, "%s: SKB length < 10\n", __func__);
1475                 goto rx_dropped;
1476         }
1477
1478         switch (ieee->iw_mode) {
1479         case IW_MODE_ADHOC:
1480         case IW_MODE_INFRA:
1481                 ret = rtllib_rx_InfraAdhoc(ieee, skb, rx_stats);
1482                 break;
1483         case IW_MODE_MASTER:
1484         case IW_MODE_REPEAT:
1485                 ret = rtllib_rx_Master(ieee, skb, rx_stats);
1486                 break;
1487         case IW_MODE_MONITOR:
1488                 ret = rtllib_rx_Monitor(ieee, skb, rx_stats);
1489                 break;
1490         case IW_MODE_MESH:
1491                 ret = rtllib_rx_Mesh(ieee, skb, rx_stats);
1492                 break;
1493         default:
1494                 netdev_info(ieee->dev, "%s: ERR iw mode!!!\n", __func__);
1495                 break;
1496         }
1497
1498         return ret;
1499
1500  rx_dropped:
1501         if (ieee)
1502                 ieee->stats.rx_dropped++;
1503         return 0;
1504 }
1505 EXPORT_SYMBOL(rtllib_rx);
1506
1507 static u8 qos_oui[QOS_OUI_LEN] = { 0x00, 0x50, 0xF2 };
1508
1509 /* Make ther structure we read from the beacon packet has the right values */
1510 static int rtllib_verify_qos_info(struct rtllib_qos_information_element
1511                                      *info_element, int sub_type)
1512 {
1513
1514         if (info_element->qui_subtype != sub_type)
1515                 return -1;
1516         if (memcmp(info_element->qui, qos_oui, QOS_OUI_LEN))
1517                 return -1;
1518         if (info_element->qui_type != QOS_OUI_TYPE)
1519                 return -1;
1520         if (info_element->version != QOS_VERSION_1)
1521                 return -1;
1522
1523         return 0;
1524 }
1525
1526
1527 /* Parse a QoS parameter element */
1528 static int rtllib_read_qos_param_element(struct rtllib_qos_parameter_info
1529                                             *element_param, struct rtllib_info_element
1530                                             *info_element)
1531 {
1532         int ret = 0;
1533         u16 size = sizeof(struct rtllib_qos_parameter_info) - 2;
1534
1535         if ((info_element == NULL) || (element_param == NULL))
1536                 return -1;
1537
1538         if (info_element->id == QOS_ELEMENT_ID && info_element->len == size) {
1539                 memcpy(element_param->info_element.qui, info_element->data,
1540                        info_element->len);
1541                 element_param->info_element.elementID = info_element->id;
1542                 element_param->info_element.length = info_element->len;
1543         } else
1544                 ret = -1;
1545         if (ret == 0)
1546                 ret = rtllib_verify_qos_info(&element_param->info_element,
1547                                                 QOS_OUI_PARAM_SUB_TYPE);
1548         return ret;
1549 }
1550
1551 /* Parse a QoS information element */
1552 static int rtllib_read_qos_info_element(struct
1553                                            rtllib_qos_information_element
1554                                            *element_info, struct rtllib_info_element
1555                                            *info_element)
1556 {
1557         int ret = 0;
1558         u16 size = sizeof(struct rtllib_qos_information_element) - 2;
1559
1560         if (element_info == NULL)
1561                 return -1;
1562         if (info_element == NULL)
1563                 return -1;
1564
1565         if ((info_element->id == QOS_ELEMENT_ID) && (info_element->len == size)) {
1566                 memcpy(element_info->qui, info_element->data,
1567                        info_element->len);
1568                 element_info->elementID = info_element->id;
1569                 element_info->length = info_element->len;
1570         } else
1571                 ret = -1;
1572
1573         if (ret == 0)
1574                 ret = rtllib_verify_qos_info(element_info,
1575                                                 QOS_OUI_INFO_SUB_TYPE);
1576         return ret;
1577 }
1578
1579
1580 /* Write QoS parameters from the ac parameters. */
1581 static int rtllib_qos_convert_ac_to_parameters(struct rtllib_qos_parameter_info *param_elm,
1582                 struct rtllib_qos_data *qos_data)
1583 {
1584         struct rtllib_qos_ac_parameter *ac_params;
1585         struct rtllib_qos_parameters *qos_param = &(qos_data->parameters);
1586         int i;
1587         u8 aci;
1588         u8 acm;
1589
1590         qos_data->wmm_acm = 0;
1591         for (i = 0; i < QOS_QUEUE_NUM; i++) {
1592                 ac_params = &(param_elm->ac_params_record[i]);
1593
1594                 aci = (ac_params->aci_aifsn & 0x60) >> 5;
1595                 acm = (ac_params->aci_aifsn & 0x10) >> 4;
1596
1597                 if (aci >= QOS_QUEUE_NUM)
1598                         continue;
1599                 switch (aci) {
1600                 case 1:
1601                         /* BIT(0) | BIT(3) */
1602                         if (acm)
1603                                 qos_data->wmm_acm |= (0x01<<0)|(0x01<<3);
1604                         break;
1605                 case 2:
1606                         /* BIT(4) | BIT(5) */
1607                         if (acm)
1608                                 qos_data->wmm_acm |= (0x01<<4)|(0x01<<5);
1609                         break;
1610                 case 3:
1611                         /* BIT(6) | BIT(7) */
1612                         if (acm)
1613                                 qos_data->wmm_acm |= (0x01<<6)|(0x01<<7);
1614                         break;
1615                 case 0:
1616                 default:
1617                         /* BIT(1) | BIT(2) */
1618                         if (acm)
1619                                 qos_data->wmm_acm |= (0x01<<1)|(0x01<<2);
1620                         break;
1621                 }
1622
1623                 qos_param->aifs[aci] = (ac_params->aci_aifsn) & 0x0f;
1624
1625                 /* WMM spec P.11: The minimum value for AIFSN shall be 2 */
1626                 qos_param->aifs[aci] = (qos_param->aifs[aci] < 2) ? 2 : qos_param->aifs[aci];
1627
1628                 qos_param->cw_min[aci] = cpu_to_le16(ac_params->ecw_min_max & 0x0F);
1629
1630                 qos_param->cw_max[aci] = cpu_to_le16((ac_params->ecw_min_max & 0xF0) >> 4);
1631
1632                 qos_param->flag[aci] =
1633                     (ac_params->aci_aifsn & 0x10) ? 0x01 : 0x00;
1634                 qos_param->tx_op_limit[aci] = ac_params->tx_op_limit;
1635         }
1636         return 0;
1637 }
1638
1639 /* we have a generic data element which it may contain QoS information or
1640  * parameters element. check the information element length to decide
1641  * which type to read
1642  */
1643 static int rtllib_parse_qos_info_param_IE(struct rtllib_info_element
1644                                              *info_element,
1645                                              struct rtllib_network *network)
1646 {
1647         int rc = 0;
1648         struct rtllib_qos_information_element qos_info_element;
1649
1650         rc = rtllib_read_qos_info_element(&qos_info_element, info_element);
1651
1652         if (rc == 0) {
1653                 network->qos_data.param_count = qos_info_element.ac_info & 0x0F;
1654                 network->flags |= NETWORK_HAS_QOS_INFORMATION;
1655         } else {
1656                 struct rtllib_qos_parameter_info param_element;
1657
1658                 rc = rtllib_read_qos_param_element(&param_element,
1659                                                       info_element);
1660                 if (rc == 0) {
1661                         rtllib_qos_convert_ac_to_parameters(&param_element,
1662                                                                &(network->qos_data));
1663                         network->flags |= NETWORK_HAS_QOS_PARAMETERS;
1664                         network->qos_data.param_count =
1665                             param_element.info_element.ac_info & 0x0F;
1666                 }
1667         }
1668
1669         if (rc == 0) {
1670                 RTLLIB_DEBUG_QOS("QoS is supported\n");
1671                 network->qos_data.supported = 1;
1672         }
1673         return rc;
1674 }
1675
1676 #define MFIE_STRING(x) case MFIE_TYPE_ ##x: return #x
1677
1678 static const char *get_info_element_string(u16 id)
1679 {
1680         switch (id) {
1681         MFIE_STRING(SSID);
1682         MFIE_STRING(RATES);
1683         MFIE_STRING(FH_SET);
1684         MFIE_STRING(DS_SET);
1685         MFIE_STRING(CF_SET);
1686         MFIE_STRING(TIM);
1687         MFIE_STRING(IBSS_SET);
1688         MFIE_STRING(COUNTRY);
1689         MFIE_STRING(HOP_PARAMS);
1690         MFIE_STRING(HOP_TABLE);
1691         MFIE_STRING(REQUEST);
1692         MFIE_STRING(CHALLENGE);
1693         MFIE_STRING(POWER_CONSTRAINT);
1694         MFIE_STRING(POWER_CAPABILITY);
1695         MFIE_STRING(TPC_REQUEST);
1696         MFIE_STRING(TPC_REPORT);
1697         MFIE_STRING(SUPP_CHANNELS);
1698         MFIE_STRING(CSA);
1699         MFIE_STRING(MEASURE_REQUEST);
1700         MFIE_STRING(MEASURE_REPORT);
1701         MFIE_STRING(QUIET);
1702         MFIE_STRING(IBSS_DFS);
1703         MFIE_STRING(RSN);
1704         MFIE_STRING(RATES_EX);
1705         MFIE_STRING(GENERIC);
1706         MFIE_STRING(QOS_PARAMETER);
1707         default:
1708                 return "UNKNOWN";
1709         }
1710 }
1711
1712 static inline void rtllib_extract_country_ie(
1713         struct rtllib_device *ieee,
1714         struct rtllib_info_element *info_element,
1715         struct rtllib_network *network,
1716         u8 *addr2)
1717 {
1718         if (IS_DOT11D_ENABLE(ieee)) {
1719                 if (info_element->len != 0) {
1720                         memcpy(network->CountryIeBuf, info_element->data, info_element->len);
1721                         network->CountryIeLen = info_element->len;
1722
1723                         if (!IS_COUNTRY_IE_VALID(ieee)) {
1724                                 if (rtllib_act_scanning(ieee, false) && ieee->FirstIe_InScan)
1725                                         netdev_info(ieee->dev,
1726                                                     "Received beacon ContryIE, SSID: <%s>\n",
1727                                                     network->ssid);
1728                                 Dot11d_UpdateCountryIe(ieee, addr2, info_element->len, info_element->data);
1729                         }
1730                 }
1731
1732                 if (IS_EQUAL_CIE_SRC(ieee, addr2))
1733                         UPDATE_CIE_WATCHDOG(ieee);
1734         }
1735
1736 }
1737
1738 int rtllib_parse_info_param(struct rtllib_device *ieee,
1739                 struct rtllib_info_element *info_element,
1740                 u16 length,
1741                 struct rtllib_network *network,
1742                 struct rtllib_rx_stats *stats)
1743 {
1744         u8 i;
1745         short offset;
1746         u16     tmp_htcap_len = 0;
1747         u16     tmp_htinfo_len = 0;
1748         u16 ht_realtek_agg_len = 0;
1749         u8  ht_realtek_agg_buf[MAX_IE_LEN];
1750         char rates_str[64];
1751         char *p;
1752
1753         while (length >= sizeof(*info_element)) {
1754                 if (sizeof(*info_element) + info_element->len > length) {
1755                         RTLLIB_DEBUG_MGMT("Info elem: parse failed: info_element->len + 2 > left : info_element->len+2=%zd left=%d, id=%d.\n",
1756                                              info_element->len +
1757                                              sizeof(*info_element),
1758                                              length, info_element->id);
1759                         /* We stop processing but don't return an error here
1760                          * because some misbehaviour APs break this rule. ie.
1761                          * Orinoco AP1000.
1762                          */
1763                         break;
1764                 }
1765
1766                 switch (info_element->id) {
1767                 case MFIE_TYPE_SSID:
1768                         if (rtllib_is_empty_essid(info_element->data,
1769                                                      info_element->len)) {
1770                                 network->flags |= NETWORK_EMPTY_ESSID;
1771                                 break;
1772                         }
1773
1774                         network->ssid_len = min(info_element->len,
1775                                                 (u8) IW_ESSID_MAX_SIZE);
1776                         memcpy(network->ssid, info_element->data, network->ssid_len);
1777                         if (network->ssid_len < IW_ESSID_MAX_SIZE)
1778                                 memset(network->ssid + network->ssid_len, 0,
1779                                        IW_ESSID_MAX_SIZE - network->ssid_len);
1780
1781                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_SSID: '%s' len=%d.\n",
1782                                              network->ssid, network->ssid_len);
1783                         break;
1784
1785                 case MFIE_TYPE_RATES:
1786                         p = rates_str;
1787                         network->rates_len = min(info_element->len,
1788                                                  MAX_RATES_LENGTH);
1789                         for (i = 0; i < network->rates_len; i++) {
1790                                 network->rates[i] = info_element->data[i];
1791                                 p += snprintf(p, sizeof(rates_str) -
1792                                               (p - rates_str), "%02X ",
1793                                               network->rates[i]);
1794                                 if (rtllib_is_ofdm_rate
1795                                     (info_element->data[i])) {
1796                                         network->flags |= NETWORK_HAS_OFDM;
1797                                         if (info_element->data[i] &
1798                                             RTLLIB_BASIC_RATE_MASK)
1799                                                 network->flags &=
1800                                                     ~NETWORK_HAS_CCK;
1801                                 }
1802
1803                                 if (rtllib_is_cck_rate
1804                                     (info_element->data[i])) {
1805                                         network->flags |= NETWORK_HAS_CCK;
1806                                 }
1807                         }
1808
1809                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_RATES: '%s' (%d)\n",
1810                                              rates_str, network->rates_len);
1811                         break;
1812
1813                 case MFIE_TYPE_RATES_EX:
1814                         p = rates_str;
1815                         network->rates_ex_len = min(info_element->len,
1816                                                     MAX_RATES_EX_LENGTH);
1817                         for (i = 0; i < network->rates_ex_len; i++) {
1818                                 network->rates_ex[i] = info_element->data[i];
1819                                 p += snprintf(p, sizeof(rates_str) -
1820                                               (p - rates_str), "%02X ",
1821                                               network->rates_ex[i]);
1822                                 if (rtllib_is_ofdm_rate
1823                                     (info_element->data[i])) {
1824                                         network->flags |= NETWORK_HAS_OFDM;
1825                                         if (info_element->data[i] &
1826                                             RTLLIB_BASIC_RATE_MASK)
1827                                                 network->flags &=
1828                                                     ~NETWORK_HAS_CCK;
1829                                 }
1830                         }
1831
1832                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_RATES_EX: '%s' (%d)\n",
1833                                              rates_str, network->rates_ex_len);
1834                         break;
1835
1836                 case MFIE_TYPE_DS_SET:
1837                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_DS_SET: %d\n",
1838                                              info_element->data[0]);
1839                         network->channel = info_element->data[0];
1840                         break;
1841
1842                 case MFIE_TYPE_FH_SET:
1843                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_FH_SET: ignored\n");
1844                         break;
1845
1846                 case MFIE_TYPE_CF_SET:
1847                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_CF_SET: ignored\n");
1848                         break;
1849
1850                 case MFIE_TYPE_TIM:
1851                         if (info_element->len < 4)
1852                                 break;
1853
1854                         network->tim.tim_count = info_element->data[0];
1855                         network->tim.tim_period = info_element->data[1];
1856
1857                         network->dtim_period = info_element->data[1];
1858                         if (ieee->state != RTLLIB_LINKED)
1859                                 break;
1860                         network->last_dtim_sta_time = jiffies;
1861
1862                         network->dtim_data = RTLLIB_DTIM_VALID;
1863
1864
1865                         if (info_element->data[2] & 1)
1866                                 network->dtim_data |= RTLLIB_DTIM_MBCAST;
1867
1868                         offset = (info_element->data[2] >> 1)*2;
1869
1870
1871                         if (ieee->assoc_id < 8*offset ||
1872                             ieee->assoc_id > 8*(offset + info_element->len - 3))
1873                                 break;
1874
1875                         offset = (ieee->assoc_id / 8) - offset;
1876                         if (info_element->data[3 + offset] &
1877                            (1 << (ieee->assoc_id % 8)))
1878                                 network->dtim_data |= RTLLIB_DTIM_UCAST;
1879
1880                         network->listen_interval = network->dtim_period;
1881                         break;
1882
1883                 case MFIE_TYPE_ERP:
1884                         network->erp_value = info_element->data[0];
1885                         network->flags |= NETWORK_HAS_ERP_VALUE;
1886                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_ERP_SET: %d\n",
1887                                              network->erp_value);
1888                         break;
1889                 case MFIE_TYPE_IBSS_SET:
1890                         network->atim_window = info_element->data[0];
1891                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_IBSS_SET: %d\n",
1892                                              network->atim_window);
1893                         break;
1894
1895                 case MFIE_TYPE_CHALLENGE:
1896                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_CHALLENGE: ignored\n");
1897                         break;
1898
1899                 case MFIE_TYPE_GENERIC:
1900                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_GENERIC: %d bytes\n",
1901                                              info_element->len);
1902                         if (!rtllib_parse_qos_info_param_IE(info_element,
1903                                                                network))
1904                                 break;
1905                         if (info_element->len >= 4 &&
1906                             info_element->data[0] == 0x00 &&
1907                             info_element->data[1] == 0x50 &&
1908                             info_element->data[2] == 0xf2 &&
1909                             info_element->data[3] == 0x01) {
1910                                 network->wpa_ie_len = min(info_element->len + 2,
1911                                                           MAX_WPA_IE_LEN);
1912                                 memcpy(network->wpa_ie, info_element,
1913                                        network->wpa_ie_len);
1914                                 break;
1915                         }
1916                         if (info_element->len == 7 &&
1917                             info_element->data[0] == 0x00 &&
1918                             info_element->data[1] == 0xe0 &&
1919                             info_element->data[2] == 0x4c &&
1920                             info_element->data[3] == 0x01 &&
1921                             info_element->data[4] == 0x02)
1922                                 network->Turbo_Enable = 1;
1923
1924                         if (tmp_htcap_len == 0) {
1925                                 if (info_element->len >= 4 &&
1926                                    info_element->data[0] == 0x00 &&
1927                                    info_element->data[1] == 0x90 &&
1928                                    info_element->data[2] == 0x4c &&
1929                                    info_element->data[3] == 0x033) {
1930
1931                                         tmp_htcap_len = min_t(u8, info_element->len, MAX_IE_LEN);
1932                                         if (tmp_htcap_len != 0) {
1933                                                 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1934                                                 network->bssht.bdHTCapLen = min_t(u16, tmp_htcap_len, sizeof(network->bssht.bdHTCapBuf));
1935                                                 memcpy(network->bssht.bdHTCapBuf, info_element->data, network->bssht.bdHTCapLen);
1936                                         }
1937                                 }
1938                                 if (tmp_htcap_len != 0) {
1939                                         network->bssht.bdSupportHT = true;
1940                                         network->bssht.bdHT1R = ((((struct ht_capab_ele *)(network->bssht.bdHTCapBuf))->MCS[1]) == 0);
1941                                 } else {
1942                                         network->bssht.bdSupportHT = false;
1943                                         network->bssht.bdHT1R = false;
1944                                 }
1945                         }
1946
1947
1948                         if (tmp_htinfo_len == 0) {
1949                                 if (info_element->len >= 4 &&
1950                                     info_element->data[0] == 0x00 &&
1951                                     info_element->data[1] == 0x90 &&
1952                                     info_element->data[2] == 0x4c &&
1953                                     info_element->data[3] == 0x034) {
1954                                         tmp_htinfo_len = min_t(u8, info_element->len, MAX_IE_LEN);
1955                                         if (tmp_htinfo_len != 0) {
1956                                                 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
1957                                                 network->bssht.bdHTInfoLen = min_t(u16, tmp_htinfo_len, sizeof(network->bssht.bdHTInfoBuf));
1958                                                 memcpy(network->bssht.bdHTInfoBuf, info_element->data, network->bssht.bdHTInfoLen);
1959                                         }
1960
1961                                 }
1962                         }
1963
1964                         if (ieee->aggregation) {
1965                                 if (network->bssht.bdSupportHT) {
1966                                         if (info_element->len >= 4 &&
1967                                             info_element->data[0] == 0x00 &&
1968                                             info_element->data[1] == 0xe0 &&
1969                                             info_element->data[2] == 0x4c &&
1970                                             info_element->data[3] == 0x02) {
1971                                                 ht_realtek_agg_len = min_t(u8, info_element->len, MAX_IE_LEN);
1972                                                 memcpy(ht_realtek_agg_buf, info_element->data, info_element->len);
1973                                         }
1974                                         if (ht_realtek_agg_len >= 5) {
1975                                                 network->realtek_cap_exit = true;
1976                                                 network->bssht.bdRT2RTAggregation = true;
1977
1978                                                 if ((ht_realtek_agg_buf[4] == 1) && (ht_realtek_agg_buf[5] & 0x02))
1979                                                         network->bssht.bdRT2RTLongSlotTime = true;
1980
1981                                                 if ((ht_realtek_agg_buf[4] == 1) && (ht_realtek_agg_buf[5] & RT_HT_CAP_USE_92SE))
1982                                                         network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_92SE;
1983                                         }
1984                                 }
1985                                 if (ht_realtek_agg_len >= 5) {
1986                                         if ((ht_realtek_agg_buf[5] & RT_HT_CAP_USE_SOFTAP))
1987                                                 network->bssht.RT2RT_HT_Mode |= RT_HT_CAP_USE_SOFTAP;
1988                                 }
1989                         }
1990
1991                         if ((info_element->len >= 3 &&
1992                              info_element->data[0] == 0x00 &&
1993                              info_element->data[1] == 0x05 &&
1994                              info_element->data[2] == 0xb5) ||
1995                              (info_element->len >= 3 &&
1996                              info_element->data[0] == 0x00 &&
1997                              info_element->data[1] == 0x0a &&
1998                              info_element->data[2] == 0xf7) ||
1999                              (info_element->len >= 3 &&
2000                              info_element->data[0] == 0x00 &&
2001                              info_element->data[1] == 0x10 &&
2002                              info_element->data[2] == 0x18)) {
2003                                 network->broadcom_cap_exist = true;
2004                         }
2005                         if (info_element->len >= 3 &&
2006                             info_element->data[0] == 0x00 &&
2007                             info_element->data[1] == 0x0c &&
2008                             info_element->data[2] == 0x43)
2009                                 network->ralink_cap_exist = true;
2010                         if ((info_element->len >= 3 &&
2011                              info_element->data[0] == 0x00 &&
2012                              info_element->data[1] == 0x03 &&
2013                              info_element->data[2] == 0x7f) ||
2014                              (info_element->len >= 3 &&
2015                              info_element->data[0] == 0x00 &&
2016                              info_element->data[1] == 0x13 &&
2017                              info_element->data[2] == 0x74))
2018                                 network->atheros_cap_exist = true;
2019
2020                         if ((info_element->len >= 3 &&
2021                              info_element->data[0] == 0x00 &&
2022                              info_element->data[1] == 0x50 &&
2023                              info_element->data[2] == 0x43))
2024                                 network->marvell_cap_exist = true;
2025                         if (info_element->len >= 3 &&
2026                             info_element->data[0] == 0x00 &&
2027                             info_element->data[1] == 0x40 &&
2028                             info_element->data[2] == 0x96)
2029                                 network->cisco_cap_exist = true;
2030
2031
2032                         if (info_element->len >= 3 &&
2033                             info_element->data[0] == 0x00 &&
2034                             info_element->data[1] == 0x0a &&
2035                             info_element->data[2] == 0xf5)
2036                                 network->airgo_cap_exist = true;
2037
2038                         if (info_element->len > 4 &&
2039                             info_element->data[0] == 0x00 &&
2040                             info_element->data[1] == 0x40 &&
2041                             info_element->data[2] == 0x96 &&
2042                             info_element->data[3] == 0x01) {
2043                                 if (info_element->len == 6) {
2044                                         memcpy(network->CcxRmState, &info_element[4], 2);
2045                                         if (network->CcxRmState[0] != 0)
2046                                                 network->bCcxRmEnable = true;
2047                                         else
2048                                                 network->bCcxRmEnable = false;
2049                                         network->MBssidMask = network->CcxRmState[1] & 0x07;
2050                                         if (network->MBssidMask != 0) {
2051                                                 network->bMBssidValid = true;
2052                                                 network->MBssidMask = 0xff << (network->MBssidMask);
2053                                                 memcpy(network->MBssid, network->bssid, ETH_ALEN);
2054                                                 network->MBssid[5] &= network->MBssidMask;
2055                                         } else {
2056                                                 network->bMBssidValid = false;
2057                                         }
2058                                 } else {
2059                                         network->bCcxRmEnable = false;
2060                                 }
2061                         }
2062                         if (info_element->len > 4  &&
2063                             info_element->data[0] == 0x00 &&
2064                             info_element->data[1] == 0x40 &&
2065                             info_element->data[2] == 0x96 &&
2066                             info_element->data[3] == 0x03) {
2067                                 if (info_element->len == 5) {
2068                                         network->bWithCcxVerNum = true;
2069                                         network->BssCcxVerNumber = info_element->data[4];
2070                                 } else {
2071                                         network->bWithCcxVerNum = false;
2072                                         network->BssCcxVerNumber = 0;
2073                                 }
2074                         }
2075                         if (info_element->len > 4  &&
2076                             info_element->data[0] == 0x00 &&
2077                             info_element->data[1] == 0x50 &&
2078                             info_element->data[2] == 0xf2 &&
2079                             info_element->data[3] == 0x04) {
2080                                 RTLLIB_DEBUG_MGMT("MFIE_TYPE_WZC: %d bytes\n",
2081                                                      info_element->len);
2082                                 network->wzc_ie_len = min(info_element->len+2,
2083                                                           MAX_WZC_IE_LEN);
2084                                 memcpy(network->wzc_ie, info_element,
2085                                                 network->wzc_ie_len);
2086                         }
2087                         break;
2088
2089                 case MFIE_TYPE_RSN:
2090                         RTLLIB_DEBUG_MGMT("MFIE_TYPE_RSN: %d bytes\n",
2091                                              info_element->len);
2092                         network->rsn_ie_len = min(info_element->len + 2,
2093                                                   MAX_WPA_IE_LEN);
2094                         memcpy(network->rsn_ie, info_element,
2095                                network->rsn_ie_len);
2096                         break;
2097
2098                 case MFIE_TYPE_HT_CAP:
2099                         RTLLIB_DEBUG_SCAN("MFIE_TYPE_HT_CAP: %d bytes\n",
2100                                              info_element->len);
2101                         tmp_htcap_len = min_t(u8, info_element->len, MAX_IE_LEN);
2102                         if (tmp_htcap_len != 0) {
2103                                 network->bssht.bdHTSpecVer = HT_SPEC_VER_EWC;
2104                                 network->bssht.bdHTCapLen = tmp_htcap_len > sizeof(network->bssht.bdHTCapBuf) ?
2105                                         sizeof(network->bssht.bdHTCapBuf) : tmp_htcap_len;
2106                                 memcpy(network->bssht.bdHTCapBuf,
2107                                        info_element->data,
2108                                        network->bssht.bdHTCapLen);
2109
2110                                 network->bssht.bdSupportHT = true;
2111                                 network->bssht.bdHT1R = ((((struct ht_capab_ele *)
2112                                                         network->bssht.bdHTCapBuf))->MCS[1]) == 0;
2113
2114                                 network->bssht.bdBandWidth = (enum ht_channel_width)
2115                                                              (((struct ht_capab_ele *)
2116                                                              (network->bssht.bdHTCapBuf))->ChlWidth);
2117                         } else {
2118                                 network->bssht.bdSupportHT = false;
2119                                 network->bssht.bdHT1R = false;
2120                                 network->bssht.bdBandWidth = HT_CHANNEL_WIDTH_20;
2121                         }
2122                         break;
2123
2124
2125                 case MFIE_TYPE_HT_INFO:
2126                         RTLLIB_DEBUG_SCAN("MFIE_TYPE_HT_INFO: %d bytes\n",
2127                                              info_element->len);
2128                         tmp_htinfo_len = min_t(u8, info_element->len, MAX_IE_LEN);
2129                         if (tmp_htinfo_len) {
2130                                 network->bssht.bdHTSpecVer = HT_SPEC_VER_IEEE;
2131                                 network->bssht.bdHTInfoLen = tmp_htinfo_len >
2132                                         sizeof(network->bssht.bdHTInfoBuf) ?
2133                                         sizeof(network->bssht.bdHTInfoBuf) :
2134                                         tmp_htinfo_len;
2135                                 memcpy(network->bssht.bdHTInfoBuf,
2136                                        info_element->data,
2137                                        network->bssht.bdHTInfoLen);
2138                         }
2139                         break;
2140
2141                 case MFIE_TYPE_AIRONET:
2142                         RTLLIB_DEBUG_SCAN("MFIE_TYPE_AIRONET: %d bytes\n",
2143                                              info_element->len);
2144                         if (info_element->len > IE_CISCO_FLAG_POSITION) {
2145                                 network->bWithAironetIE = true;
2146
2147                                 if ((info_element->data[IE_CISCO_FLAG_POSITION]
2148                                      & SUPPORT_CKIP_MIC) ||
2149                                      (info_element->data[IE_CISCO_FLAG_POSITION]
2150                                      & SUPPORT_CKIP_PK))
2151                                         network->bCkipSupported = true;
2152                                 else
2153                                         network->bCkipSupported = false;
2154                         } else {
2155                                 network->bWithAironetIE = false;
2156                                 network->bCkipSupported = false;
2157                         }
2158                         break;
2159                 case MFIE_TYPE_QOS_PARAMETER:
2160                         netdev_err(ieee->dev,
2161                                    "QoS Error need to parse QOS_PARAMETER IE\n");
2162                         break;
2163
2164                 case MFIE_TYPE_COUNTRY:
2165                         RTLLIB_DEBUG_SCAN("MFIE_TYPE_COUNTRY: %d bytes\n",
2166                                              info_element->len);
2167                         rtllib_extract_country_ie(ieee, info_element, network,
2168                                                   network->bssid);
2169                         break;
2170 /* TODO */
2171                 default:
2172                         RTLLIB_DEBUG_MGMT
2173                             ("Unsupported info element: %s (%d)\n",
2174                              get_info_element_string(info_element->id),
2175                              info_element->id);
2176                         break;
2177                 }
2178
2179                 length -= sizeof(*info_element) + info_element->len;
2180                 info_element =
2181                     (struct rtllib_info_element *)&info_element->
2182                     data[info_element->len];
2183         }
2184
2185         if (!network->atheros_cap_exist && !network->broadcom_cap_exist &&
2186             !network->cisco_cap_exist && !network->ralink_cap_exist &&
2187             !network->bssht.bdRT2RTAggregation)
2188                 network->unknown_cap_exist = true;
2189         else
2190                 network->unknown_cap_exist = false;
2191         return 0;
2192 }
2193
2194 static long rtllib_translate_todbm(u8 signal_strength_index)
2195 {
2196         long    signal_power;
2197
2198         signal_power = (long)((signal_strength_index + 1) >> 1);
2199         signal_power -= 95;
2200
2201         return signal_power;
2202 }
2203
2204 static inline int rtllib_network_init(
2205         struct rtllib_device *ieee,
2206         struct rtllib_probe_response *beacon,
2207         struct rtllib_network *network,
2208         struct rtllib_rx_stats *stats)
2209 {
2210         memset(&network->qos_data, 0, sizeof(struct rtllib_qos_data));
2211
2212         /* Pull out fixed field data */
2213         memcpy(network->bssid, beacon->header.addr3, ETH_ALEN);
2214         network->capability = le16_to_cpu(beacon->capability);
2215         network->last_scanned = jiffies;
2216         network->time_stamp[0] = beacon->time_stamp[0];
2217         network->time_stamp[1] = beacon->time_stamp[1];
2218         network->beacon_interval = le16_to_cpu(beacon->beacon_interval);
2219         /* Where to pull this? beacon->listen_interval;*/
2220         network->listen_interval = 0x0A;
2221         network->rates_len = network->rates_ex_len = 0;
2222         network->last_associate = 0;
2223         network->ssid_len = 0;
2224         network->hidden_ssid_len = 0;
2225         memset(network->hidden_ssid, 0, sizeof(network->hidden_ssid));
2226         network->flags = 0;
2227         network->atim_window = 0;
2228         network->erp_value = (network->capability & WLAN_CAPABILITY_IBSS) ?
2229             0x3 : 0x0;
2230         network->berp_info_valid = false;
2231         network->broadcom_cap_exist = false;
2232         network->ralink_cap_exist = false;
2233         network->atheros_cap_exist = false;
2234         network->cisco_cap_exist = false;
2235         network->unknown_cap_exist = false;
2236         network->realtek_cap_exit = false;
2237         network->marvell_cap_exist = false;
2238         network->airgo_cap_exist = false;
2239         network->Turbo_Enable = 0;
2240         network->SignalStrength = stats->SignalStrength;
2241         network->RSSI = stats->SignalStrength;
2242         network->CountryIeLen = 0;
2243         memset(network->CountryIeBuf, 0, MAX_IE_LEN);
2244         HTInitializeBssDesc(&network->bssht);
2245         if (stats->freq == RTLLIB_52GHZ_BAND) {
2246                 /* for A band (No DS info) */
2247                 network->channel = stats->received_channel;
2248         } else
2249                 network->flags |= NETWORK_HAS_CCK;
2250
2251         network->wpa_ie_len = 0;
2252         network->rsn_ie_len = 0;
2253         network->wzc_ie_len = 0;
2254
2255         if (rtllib_parse_info_param(ieee,
2256                         beacon->info_element,
2257                         (stats->len - sizeof(*beacon)),
2258                         network,
2259                         stats))
2260                 return 1;
2261
2262         network->mode = 0;
2263         if (stats->freq == RTLLIB_52GHZ_BAND)
2264                 network->mode = IEEE_A;
2265         else {
2266                 if (network->flags & NETWORK_HAS_OFDM)
2267                         network->mode |= IEEE_G;
2268                 if (network->flags & NETWORK_HAS_CCK)
2269                         network->mode |= IEEE_B;
2270         }
2271
2272         if (network->mode == 0) {
2273                 RTLLIB_DEBUG_SCAN("Filtered out '%s (%pM)' network.\n",
2274                                      escape_essid(network->ssid,
2275                                                   network->ssid_len),
2276                                      network->bssid);
2277                 return 1;
2278         }
2279
2280         if (network->bssht.bdSupportHT) {
2281                 if (network->mode == IEEE_A)
2282                         network->mode = IEEE_N_5G;
2283                 else if (network->mode & (IEEE_G | IEEE_B))
2284                         network->mode = IEEE_N_24G;
2285         }
2286         if (rtllib_is_empty_essid(network->ssid, network->ssid_len))
2287                 network->flags |= NETWORK_EMPTY_ESSID;
2288         stats->signal = 30 + (stats->SignalStrength * 70) / 100;
2289         stats->noise = rtllib_translate_todbm((u8)(100-stats->signal)) - 25;
2290
2291         memcpy(&network->stats, stats, sizeof(network->stats));
2292
2293         return 0;
2294 }
2295
2296 static inline int is_same_network(struct rtllib_network *src,
2297                                   struct rtllib_network *dst, u8 ssidbroad)
2298 {
2299         /* A network is only a duplicate if the channel, BSSID, ESSID
2300          * and the capability field (in particular IBSS and BSS) all match.
2301          * We treat all <hidden> with the same BSSID and channel
2302          * as one network
2303          */
2304         return (((src->ssid_len == dst->ssid_len) || (!ssidbroad)) &&
2305                 (src->channel == dst->channel) &&
2306                 !memcmp(src->bssid, dst->bssid, ETH_ALEN) &&
2307                 (!memcmp(src->ssid, dst->ssid, src->ssid_len) ||
2308                 (!ssidbroad)) &&
2309                 ((src->capability & WLAN_CAPABILITY_IBSS) ==
2310                 (dst->capability & WLAN_CAPABILITY_IBSS)) &&
2311                 ((src->capability & WLAN_CAPABILITY_ESS) ==
2312                 (dst->capability & WLAN_CAPABILITY_ESS)));
2313 }
2314
2315
2316 static inline void update_network(struct rtllib_network *dst,
2317                                   struct rtllib_network *src)
2318 {
2319         int qos_active;
2320         u8 old_param;
2321
2322         memcpy(&dst->stats, &src->stats, sizeof(struct rtllib_rx_stats));
2323         dst->capability = src->capability;
2324         memcpy(dst->rates, src->rates, src->rates_len);
2325         dst->rates_len = src->rates_len;
2326         memcpy(dst->rates_ex, src->rates_ex, src->rates_ex_len);
2327         dst->rates_ex_len = src->rates_ex_len;
2328         if (src->ssid_len > 0) {
2329                 if (dst->ssid_len == 0) {
2330                         memset(dst->hidden_ssid, 0, sizeof(dst->hidden_ssid));
2331                         dst->hidden_ssid_len = src->ssid_len;
2332                         memcpy(dst->hidden_ssid, src->ssid, src->ssid_len);
2333                 } else {
2334                         memset(dst->ssid, 0, dst->ssid_len);
2335                         dst->ssid_len = src->ssid_len;
2336                         memcpy(dst->ssid, src->ssid, src->ssid_len);
2337                 }
2338         }
2339         dst->mode = src->mode;
2340         dst->flags = src->flags;
2341         dst->time_stamp[0] = src->time_stamp[0];
2342         dst->time_stamp[1] = src->time_stamp[1];
2343         if (src->flags & NETWORK_HAS_ERP_VALUE) {
2344                 dst->erp_value = src->erp_value;
2345                 dst->berp_info_valid = src->berp_info_valid = true;
2346         }
2347         dst->beacon_interval = src->beacon_interval;
2348         dst->listen_interval = src->listen_interval;
2349         dst->atim_window = src->atim_window;
2350         dst->dtim_period = src->dtim_period;
2351         dst->dtim_data = src->dtim_data;
2352         dst->last_dtim_sta_time = src->last_dtim_sta_time;
2353         memcpy(&dst->tim, &src->tim, sizeof(struct rtllib_tim_parameters));
2354
2355         dst->bssht.bdSupportHT = src->bssht.bdSupportHT;
2356         dst->bssht.bdRT2RTAggregation = src->bssht.bdRT2RTAggregation;
2357         dst->bssht.bdHTCapLen = src->bssht.bdHTCapLen;
2358         memcpy(dst->bssht.bdHTCapBuf, src->bssht.bdHTCapBuf,
2359                src->bssht.bdHTCapLen);
2360         dst->bssht.bdHTInfoLen = src->bssht.bdHTInfoLen;
2361         memcpy(dst->bssht.bdHTInfoBuf, src->bssht.bdHTInfoBuf,
2362                src->bssht.bdHTInfoLen);
2363         dst->bssht.bdHTSpecVer = src->bssht.bdHTSpecVer;
2364         dst->bssht.bdRT2RTLongSlotTime = src->bssht.bdRT2RTLongSlotTime;
2365         dst->broadcom_cap_exist = src->broadcom_cap_exist;
2366         dst->ralink_cap_exist = src->ralink_cap_exist;
2367         dst->atheros_cap_exist = src->atheros_cap_exist;
2368         dst->realtek_cap_exit = src->realtek_cap_exit;
2369         dst->marvell_cap_exist = src->marvell_cap_exist;
2370         dst->cisco_cap_exist = src->cisco_cap_exist;
2371         dst->airgo_cap_exist = src->airgo_cap_exist;
2372         dst->unknown_cap_exist = src->unknown_cap_exist;
2373         memcpy(dst->wpa_ie, src->wpa_ie, src->wpa_ie_len);
2374         dst->wpa_ie_len = src->wpa_ie_len;
2375         memcpy(dst->rsn_ie, src->rsn_ie, src->rsn_ie_len);
2376         dst->rsn_ie_len = src->rsn_ie_len;
2377         memcpy(dst->wzc_ie, src->wzc_ie, src->wzc_ie_len);
2378         dst->wzc_ie_len = src->wzc_ie_len;
2379
2380         dst->last_scanned = jiffies;
2381         /* qos related parameters */
2382         qos_active = dst->qos_data.active;
2383         old_param = dst->qos_data.param_count;
2384         dst->qos_data.supported = src->qos_data.supported;
2385         if (dst->flags & NETWORK_HAS_QOS_PARAMETERS)
2386                 memcpy(&dst->qos_data, &src->qos_data,
2387                        sizeof(struct rtllib_qos_data));
2388         if (dst->qos_data.supported == 1) {
2389                 if (dst->ssid_len)
2390                         RTLLIB_DEBUG_QOS
2391                                 ("QoS the network %s is QoS supported\n",
2392                                 dst->ssid);
2393                 else
2394                         RTLLIB_DEBUG_QOS
2395                                 ("QoS the network is QoS supported\n");
2396         }
2397         dst->qos_data.active = qos_active;
2398         dst->qos_data.old_param_count = old_param;
2399
2400         /* dst->last_associate is not overwritten */
2401         dst->wmm_info = src->wmm_info;
2402         if (src->wmm_param[0].ac_aci_acm_aifsn ||
2403            src->wmm_param[1].ac_aci_acm_aifsn ||
2404            src->wmm_param[2].ac_aci_acm_aifsn ||
2405            src->wmm_param[3].ac_aci_acm_aifsn)
2406                 memcpy(dst->wmm_param, src->wmm_param, WME_AC_PRAM_LEN);
2407
2408         dst->SignalStrength = src->SignalStrength;
2409         dst->RSSI = src->RSSI;
2410         dst->Turbo_Enable = src->Turbo_Enable;
2411
2412         dst->CountryIeLen = src->CountryIeLen;
2413         memcpy(dst->CountryIeBuf, src->CountryIeBuf, src->CountryIeLen);
2414
2415         dst->bWithAironetIE = src->bWithAironetIE;
2416         dst->bCkipSupported = src->bCkipSupported;
2417         memcpy(dst->CcxRmState, src->CcxRmState, 2);
2418         dst->bCcxRmEnable = src->bCcxRmEnable;
2419         dst->MBssidMask = src->MBssidMask;
2420         dst->bMBssidValid = src->bMBssidValid;
2421         memcpy(dst->MBssid, src->MBssid, 6);
2422         dst->bWithCcxVerNum = src->bWithCcxVerNum;
2423         dst->BssCcxVerNumber = src->BssCcxVerNumber;
2424 }
2425
2426 static inline int is_beacon(__le16 fc)
2427 {
2428         return (WLAN_FC_GET_STYPE(le16_to_cpu(fc)) == RTLLIB_STYPE_BEACON);
2429 }
2430
2431 static int IsPassiveChannel(struct rtllib_device *rtllib, u8 channel)
2432 {
2433         if (MAX_CHANNEL_NUMBER < channel) {
2434                 netdev_info(rtllib->dev, "%s(): Invalid Channel\n", __func__);
2435                 return 0;
2436         }
2437
2438         if (rtllib->active_channel_map[channel] == 2)
2439                 return 1;
2440
2441         return 0;
2442 }
2443
2444 int rtllib_legal_channel(struct rtllib_device *rtllib, u8 channel)
2445 {
2446         if (MAX_CHANNEL_NUMBER < channel) {
2447                 netdev_info(rtllib->dev, "%s(): Invalid Channel\n", __func__);
2448                 return 0;
2449         }
2450         if (rtllib->active_channel_map[channel] > 0)
2451                 return 1;
2452
2453         return 0;
2454 }
2455 EXPORT_SYMBOL(rtllib_legal_channel);
2456
2457 static inline void rtllib_process_probe_response(
2458         struct rtllib_device *ieee,
2459         struct rtllib_probe_response *beacon,
2460         struct rtllib_rx_stats *stats)
2461 {
2462         struct rtllib_network *target;
2463         struct rtllib_network *oldest = NULL;
2464         struct rtllib_info_element *info_element = &beacon->info_element[0];
2465         unsigned long flags;
2466         short renew;
2467         struct rtllib_network *network = kzalloc(sizeof(struct rtllib_network),
2468                                                  GFP_ATOMIC);
2469
2470         if (!network)
2471                 return;
2472
2473         RTLLIB_DEBUG_SCAN(
2474                 "'%s' ( %pM ): %c%c%c%c %c%c%c%c-%c%c%c%c %c%c%c%c\n",
2475                 escape_essid(info_element->data, info_element->len),
2476                 beacon->header.addr3,
2477                 (le16_to_cpu(beacon->capability) & (1<<0xf)) ? '1' : '0',
2478                 (le16_to_cpu(beacon->capability) & (1<<0xe)) ? '1' : '0',
2479                 (le16_to_cpu(beacon->capability) & (1<<0xd)) ? '1' : '0',
2480                 (le16_to_cpu(beacon->capability) & (1<<0xc)) ? '1' : '0',
2481                 (le16_to_cpu(beacon->capability) & (1<<0xb)) ? '1' : '0',
2482                 (le16_to_cpu(beacon->capability) & (1<<0xa)) ? '1' : '0',
2483                 (le16_to_cpu(beacon->capability) & (1<<0x9)) ? '1' : '0',
2484                 (le16_to_cpu(beacon->capability) & (1<<0x8)) ? '1' : '0',
2485                 (le16_to_cpu(beacon->capability) & (1<<0x7)) ? '1' : '0',
2486                 (le16_to_cpu(beacon->capability) & (1<<0x6)) ? '1' : '0',
2487                 (le16_to_cpu(beacon->capability) & (1<<0x5)) ? '1' : '0',
2488                 (le16_to_cpu(beacon->capability) & (1<<0x4)) ? '1' : '0',
2489                 (le16_to_cpu(beacon->capability) & (1<<0x3)) ? '1' : '0',
2490                 (le16_to_cpu(beacon->capability) & (1<<0x2)) ? '1' : '0',
2491                 (le16_to_cpu(beacon->capability) & (1<<0x1)) ? '1' : '0',
2492                 (le16_to_cpu(beacon->capability) & (1<<0x0)) ? '1' : '0');
2493
2494         if (rtllib_network_init(ieee, beacon, network, stats)) {
2495                 RTLLIB_DEBUG_SCAN("Dropped '%s' ( %pM) via %s.\n",
2496                                   escape_essid(info_element->data,
2497                                   info_element->len),
2498                                   beacon->header.addr3,
2499                                   WLAN_FC_GET_STYPE(
2500                                           le16_to_cpu(beacon->header.frame_ctl)) ==
2501                                   RTLLIB_STYPE_PROBE_RESP ?
2502                                   "PROBE RESPONSE" : "BEACON");
2503                 goto free_network;
2504         }
2505
2506
2507         if (!rtllib_legal_channel(ieee, network->channel))
2508                 goto free_network;
2509
2510         if (WLAN_FC_GET_STYPE(le16_to_cpu(beacon->header.frame_ctl)) ==
2511             RTLLIB_STYPE_PROBE_RESP) {
2512                 if (IsPassiveChannel(ieee, network->channel)) {
2513                         netdev_info(ieee->dev,
2514                                     "GetScanInfo(): For Global Domain, filter probe response at channel(%d).\n",
2515                                     network->channel);
2516                         goto free_network;
2517                 }
2518         }
2519
2520         /* The network parsed correctly -- so now we scan our known networks
2521          * to see if we can find it in our list.
2522          *
2523          * NOTE:  This search is definitely not optimized.  Once its doing
2524          *      the "right thing" we'll optimize it for efficiency if
2525          *      necessary
2526          */
2527
2528         /* Search for this entry in the list and update it if it is
2529          * already there.
2530          */
2531
2532         spin_lock_irqsave(&ieee->lock, flags);
2533         if (is_same_network(&ieee->current_network, network,
2534            (network->ssid_len ? 1 : 0))) {
2535                 update_network(&ieee->current_network, network);
2536                 if ((ieee->current_network.mode == IEEE_N_24G ||
2537                      ieee->current_network.mode == IEEE_G)
2538                      && ieee->current_network.berp_info_valid) {
2539                         if (ieee->current_network.erp_value & ERP_UseProtection)
2540                                 ieee->current_network.buseprotection = true;
2541                         else
2542                                 ieee->current_network.buseprotection = false;
2543                 }
2544                 if (is_beacon(beacon->header.frame_ctl)) {
2545                         if (ieee->state >= RTLLIB_LINKED)
2546                                 ieee->LinkDetectInfo.NumRecvBcnInPeriod++;
2547                 }
2548         }
2549         list_for_each_entry(target, &ieee->network_list, list) {
2550                 if (is_same_network(target, network,
2551                    (target->ssid_len ? 1 : 0)))
2552                         break;
2553                 if ((oldest == NULL) ||
2554                     (target->last_scanned < oldest->last_scanned))
2555                         oldest = target;
2556         }
2557
2558         /* If we didn't find a match, then get a new network slot to initialize
2559          * with this beacon's information
2560          */
2561         if (&target->list == &ieee->network_list) {
2562                 if (list_empty(&ieee->network_free_list)) {
2563                         /* If there are no more slots, expire the oldest */
2564                         list_del(&oldest->list);
2565                         target = oldest;
2566                         RTLLIB_DEBUG_SCAN("Expired '%s' ( %pM) from network list.\n",
2567                                              escape_essid(target->ssid,
2568                                                           target->ssid_len),
2569                                              target->bssid);
2570                 } else {
2571                         /* Otherwise just pull from the free list */
2572                         target = list_entry(ieee->network_free_list.next,
2573                                             struct rtllib_network, list);
2574                         list_del(ieee->network_free_list.next);
2575                 }
2576
2577
2578                 RTLLIB_DEBUG_SCAN("Adding '%s' ( %pM) via %s.\n",
2579                                   escape_essid(network->ssid,
2580                                   network->ssid_len), network->bssid,
2581                                   WLAN_FC_GET_STYPE(
2582                                           le16_to_cpu(beacon->header.frame_ctl)) ==
2583                                   RTLLIB_STYPE_PROBE_RESP ?
2584                                   "PROBE RESPONSE" : "BEACON");
2585                 memcpy(target, network, sizeof(*target));
2586                 list_add_tail(&target->list, &ieee->network_list);
2587                 if (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE)
2588                         rtllib_softmac_new_net(ieee, network);
2589         } else {
2590                 RTLLIB_DEBUG_SCAN("Updating '%s' ( %pM) via %s.\n",
2591                                   escape_essid(target->ssid,
2592                                   target->ssid_len), target->bssid,
2593                                   WLAN_FC_GET_STYPE(
2594                                           le16_to_cpu(beacon->header.frame_ctl)) ==
2595                                   RTLLIB_STYPE_PROBE_RESP ?
2596                                   "PROBE RESPONSE" : "BEACON");
2597
2598                 /* we have an entry and we are going to update it. But this
2599                  *  entry may be already expired. In this case we do the same
2600                  * as we found a new net and call the new_net handler
2601                  */
2602                 renew = !time_after(target->last_scanned + ieee->scan_age,
2603                                     jiffies);
2604                 if ((!target->ssid_len) &&
2605                     (((network->ssid_len > 0) && (target->hidden_ssid_len == 0))
2606                     || ((ieee->current_network.ssid_len == network->ssid_len) &&
2607                     (strncmp(ieee->current_network.ssid, network->ssid,
2608                     network->ssid_len) == 0) &&
2609                     (ieee->state == RTLLIB_NOLINK))))
2610                         renew = 1;
2611                 update_network(target, network);
2612                 if (renew && (ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE))
2613                         rtllib_softmac_new_net(ieee, network);
2614         }
2615
2616         spin_unlock_irqrestore(&ieee->lock, flags);
2617         if (is_beacon(beacon->header.frame_ctl) &&
2618             is_same_network(&ieee->current_network, network,
2619             (network->ssid_len ? 1 : 0)) &&
2620             (ieee->state == RTLLIB_LINKED)) {
2621                 if (ieee->handle_beacon != NULL)
2622                         ieee->handle_beacon(ieee->dev, beacon,
2623                                             &ieee->current_network);
2624         }
2625 free_network:
2626         kfree(network);
2627 }
2628
2629 void rtllib_rx_mgt(struct rtllib_device *ieee,
2630                       struct sk_buff *skb,
2631                       struct rtllib_rx_stats *stats)
2632 {
2633         struct rtllib_hdr_4addr *header = (struct rtllib_hdr_4addr *)skb->data;
2634
2635         if ((WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)) !=
2636             RTLLIB_STYPE_PROBE_RESP) &&
2637             (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)) !=
2638             RTLLIB_STYPE_BEACON))
2639                 ieee->last_rx_ps_time = jiffies;
2640
2641         switch (WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl))) {
2642
2643         case RTLLIB_STYPE_BEACON:
2644                 RTLLIB_DEBUG_MGMT("received BEACON (%d)\n",
2645                                   WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
2646                 RTLLIB_DEBUG_SCAN("Beacon\n");
2647                 rtllib_process_probe_response(
2648                                 ieee, (struct rtllib_probe_response *)header,
2649                                 stats);
2650
2651                 if (ieee->sta_sleep || (ieee->ps != RTLLIB_PS_DISABLED &&
2652                     ieee->iw_mode == IW_MODE_INFRA &&
2653                     ieee->state == RTLLIB_LINKED))
2654                         tasklet_schedule(&ieee->ps_task);
2655
2656                 break;
2657
2658         case RTLLIB_STYPE_PROBE_RESP:
2659                 RTLLIB_DEBUG_MGMT("received PROBE RESPONSE (%d)\n",
2660                         WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
2661                 RTLLIB_DEBUG_SCAN("Probe response\n");
2662                 rtllib_process_probe_response(ieee,
2663                               (struct rtllib_probe_response *)header, stats);
2664                 break;
2665         case RTLLIB_STYPE_PROBE_REQ:
2666                 RTLLIB_DEBUG_MGMT("received PROBE RESQUEST (%d)\n",
2667                                   WLAN_FC_GET_STYPE(
2668                                           le16_to_cpu(header->frame_ctl)));
2669                 RTLLIB_DEBUG_SCAN("Probe request\n");
2670                 if ((ieee->softmac_features & IEEE_SOFTMAC_PROBERS) &&
2671                     ((ieee->iw_mode == IW_MODE_ADHOC ||
2672                     ieee->iw_mode == IW_MODE_MASTER) &&
2673                     ieee->state == RTLLIB_LINKED))
2674                         rtllib_rx_probe_rq(ieee, skb);
2675                 break;
2676         }
2677 }