drivers/staging/rtl8188eu/core/rtw_recv.c

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2007 - 2012 Realtek Corporation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  17  *
  18  *
  19  ******************************************************************************/
  20 #define _RTW_RECV_C_
  21
  22 #include <osdep_service.h>
  23 #include <drv_types.h>
  24 #include <recv_osdep.h>
  25 #include <mlme_osdep.h>
  26 #include <usb_ops.h>
  27 #include <wifi.h>
  28 #include <linux/vmalloc.h>
  29
  30 #define ETHERNET_HEADER_SIZE    14      /*  Ethernet Header Length */
  31 #define LLC_HEADER_SIZE                 6       /*  LLC Header Length */
  32
  33 static u8 SNAP_ETH_TYPE_IPX[2] = {0x81, 0x37};
  34 static u8 SNAP_ETH_TYPE_APPLETALK_AARP[2] = {0x80, 0xf3};
  35
  36 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
  37 static u8 rtw_bridge_tunnel_header[] = {
  38        0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8
  39 };
  40
  41 static u8 rtw_rfc1042_header[] = {
  42        0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00
  43 };
  44
  45 void rtw_signal_stat_timer_hdl(RTW_TIMER_HDL_ARGS);
  46
  47 void _rtw_init_sta_recv_priv(struct sta_recv_priv *psta_recvpriv)
  48 {
  49
  50         _rtw_memset((u8 *)psta_recvpriv, 0, sizeof (struct sta_recv_priv));
  51
  52         spin_lock_init(&psta_recvpriv->lock);
  53
  54         _rtw_init_queue(&psta_recvpriv->defrag_q);
  55
  56 }
  57
  58 int _rtw_init_recv_priv(struct recv_priv *precvpriv, struct adapter *padapter)
  59 {
  60         int i;
  61
  62         struct recv_frame *precvframe;
  63
  64         int     res = _SUCCESS;
  65
  66         spin_lock_init(&precvpriv->lock);
  67
  68         _rtw_init_queue(&precvpriv->free_recv_queue);
  69         _rtw_init_queue(&precvpriv->recv_pending_queue);
  70         _rtw_init_queue(&precvpriv->uc_swdec_pending_queue);
  71
  72         precvpriv->adapter = padapter;
  73
  74         precvpriv->free_recvframe_cnt = NR_RECVFRAME;
  75
  76         rtw_os_recv_resource_init(precvpriv, padapter);
  77
  78         precvpriv->pallocated_frame_buf = vzalloc(NR_RECVFRAME * sizeof(struct recv_frame) + RXFRAME_ALIGN_SZ);
  79
  80         if (precvpriv->pallocated_frame_buf == NULL) {
  81                 res = _FAIL;
  82                 goto exit;
  83         }
  84
  85         precvpriv->precv_frame_buf = (u8 *)N_BYTE_ALIGMENT((size_t)(precvpriv->pallocated_frame_buf), RXFRAME_ALIGN_SZ);
  86
  87         precvframe = (struct recv_frame *)precvpriv->precv_frame_buf;
  88
  89         for (i = 0; i < NR_RECVFRAME; i++) {
  90                 _rtw_init_listhead(&(precvframe->list));
  91
  92                 rtw_list_insert_tail(&(precvframe->list),
  93                                      &(precvpriv->free_recv_queue.queue));
  94
  95                 res = rtw_os_recv_resource_alloc(padapter, precvframe);
  96
  97                 precvframe->len = 0;
  98
  99                 precvframe->adapter = padapter;
 100                 precvframe++;
 101         }
 102         precvpriv->rx_pending_cnt = 1;
 103
 104         sema_init(&precvpriv->allrxreturnevt, 0);
 105
 106         res = rtw_hal_init_recv_priv(padapter);
 107
 108         _init_timer(&precvpriv->signal_stat_timer, padapter->pnetdev, RTW_TIMER_HDL_NAME(signal_stat), padapter);
 109
 110         precvpriv->signal_stat_sampling_interval = 1000; /* ms */
 111
 112         rtw_set_signal_stat_timer(precvpriv);
 113 exit:
 114
 115
 116         return res;
 117 }
 118
 119 void _rtw_free_recv_priv (struct recv_priv *precvpriv)
 120 {
 121         struct adapter  *padapter = precvpriv->adapter;
 122
 123
 124         rtw_free_uc_swdec_pending_queue(padapter);
 125
 126         rtw_os_recv_resource_free(precvpriv);
 127
 128         if (precvpriv->pallocated_frame_buf) {
 129                 vfree(precvpriv->pallocated_frame_buf);
 130         }
 131
 132         rtw_hal_free_recv_priv(padapter);
 133
 134 }
 135
 136 struct recv_frame *_rtw_alloc_recvframe (struct __queue *pfree_recv_queue)
 137 {
 138         struct recv_frame *hdr;
 139         struct list_head *plist, *phead;
 140         struct adapter *padapter;
 141         struct recv_priv *precvpriv;
 142
 143         if (_rtw_queue_empty(pfree_recv_queue)) {
 144                 hdr = NULL;
 145         } else {
 146                 phead = get_list_head(pfree_recv_queue);
 147
 148                 plist = phead->next;
 149
 150                 hdr = container_of(plist, struct recv_frame, list);
 151
 152                 rtw_list_delete(&hdr->list);
 153                 padapter = hdr->adapter;
 154                 if (padapter != NULL) {
 155                         precvpriv = &padapter->recvpriv;
 156                         if (pfree_recv_queue == &precvpriv->free_recv_queue)
 157                                 precvpriv->free_recvframe_cnt--;
 158                 }
 159         }
 160
 161
 162         return (struct recv_frame *)hdr;
 163 }
 164
 165 struct recv_frame *rtw_alloc_recvframe(struct __queue *pfree_recv_queue)
 166 {
 167         struct recv_frame  *precvframe;
 168
 169         spin_lock_bh(&pfree_recv_queue->lock);
 170
 171         precvframe = _rtw_alloc_recvframe(pfree_recv_queue);
 172
 173         spin_unlock_bh(&pfree_recv_queue->lock);
 174
 175         return precvframe;
 176 }
 177
 178 void rtw_init_recvframe(struct recv_frame *precvframe, struct recv_priv *precvpriv)
 179 {
 180         /* Perry: This can be removed */
 181         _rtw_init_listhead(&precvframe->list);
 182
 183         precvframe->len = 0;
 184 }
 185
 186 int rtw_free_recvframe(struct recv_frame *precvframe,
 187                        struct __queue *pfree_recv_queue)
 188 {
 189         struct adapter *padapter;
 190         struct recv_priv *precvpriv;
 191
 192         if (!precvframe)
 193                 return _FAIL;
 194         padapter = precvframe->adapter;
 195         precvpriv = &padapter->recvpriv;
 196         if (precvframe->pkt) {
 197                 dev_kfree_skb_any(precvframe->pkt);/* free skb by driver */
 198                 precvframe->pkt = NULL;
 199         }
 200
 201         spin_lock_bh(&pfree_recv_queue->lock);
 202
 203         rtw_list_delete(&(precvframe->list));
 204
 205         precvframe->len = 0;
 206
 207         rtw_list_insert_tail(&(precvframe->list), get_list_head(pfree_recv_queue));
 208
 209         if (padapter != NULL) {
 210                 if (pfree_recv_queue == &precvpriv->free_recv_queue)
 211                                 precvpriv->free_recvframe_cnt++;
 212         }
 213
 214       spin_unlock_bh(&pfree_recv_queue->lock);
 215
 216
 217         return _SUCCESS;
 218 }
 219
 220 int _rtw_enqueue_recvframe(struct recv_frame *precvframe, struct __queue *queue)
 221 {
 222         struct adapter *padapter = precvframe->adapter;
 223         struct recv_priv *precvpriv = &padapter->recvpriv;
 224
 225
 226         rtw_list_delete(&(precvframe->list));
 227         rtw_list_insert_tail(&(precvframe->list), get_list_head(queue));
 228
 229         if (padapter != NULL) {
 230                 if (queue == &precvpriv->free_recv_queue)
 231                         precvpriv->free_recvframe_cnt++;
 232         }
 233
 234
 235         return _SUCCESS;
 236 }
 237
 238 int rtw_enqueue_recvframe(struct recv_frame *precvframe, struct __queue *queue)
 239 {
 240         int ret;
 241
 242         spin_lock_bh(&queue->lock);
 243         ret = _rtw_enqueue_recvframe(precvframe, queue);
 244         spin_unlock_bh(&queue->lock);
 245
 246         return ret;
 247 }
 248
 249 /*
 250 caller : defrag ; recvframe_chk_defrag in recv_thread  (passive)
 251 pframequeue: defrag_queue : will be accessed in recv_thread  (passive)
 252
 253 using spinlock to protect
 254
 255 */
 256
 257 void rtw_free_recvframe_queue(struct __queue *pframequeue,  struct __queue *pfree_recv_queue)
 258 {
 259         struct recv_frame *hdr;
 260         struct list_head *plist, *phead;
 261
 262         spin_lock(&pframequeue->lock);
 263
 264         phead = get_list_head(pframequeue);
 265         plist = phead->next;
 266
 267         while (rtw_end_of_queue_search(phead, plist) == false) {
 268                 hdr = container_of(plist, struct recv_frame, list);
 269
 270                 plist = plist->next;
 271
 272                 rtw_free_recvframe((struct recv_frame *)hdr, pfree_recv_queue);
 273         }
 274
 275         spin_unlock(&pframequeue->lock);
 276
 277 }
 278
 279 u32 rtw_free_uc_swdec_pending_queue(struct adapter *adapter)
 280 {
 281         u32 cnt = 0;
 282         struct recv_frame *pending_frame;
 283         while ((pending_frame = rtw_alloc_recvframe(&adapter->recvpriv.uc_swdec_pending_queue))) {
 284                 rtw_free_recvframe(pending_frame, &adapter->recvpriv.free_recv_queue);
 285                 DBG_88E("%s: dequeue uc_swdec_pending_queue\n", __func__);
 286                 cnt++;
 287         }
 288
 289         return cnt;
 290 }
 291
 292 int rtw_enqueue_recvbuf_to_head(struct recv_buf *precvbuf, struct __queue *queue)
 293 {
 294         spin_lock_bh(&queue->lock);
 295
 296         rtw_list_delete(&precvbuf->list);
 297         rtw_list_insert_head(&precvbuf->list, get_list_head(queue));
 298
 299         spin_unlock_bh(&queue->lock);
 300
 301         return _SUCCESS;
 302 }
 303
 304 int rtw_enqueue_recvbuf(struct recv_buf *precvbuf, struct __queue *queue)
 305 {
 306         unsigned long irqL;
 307         spin_lock_irqsave(&queue->lock, irqL);
 308
 309         rtw_list_delete(&precvbuf->list);
 310
 311         rtw_list_insert_tail(&precvbuf->list, get_list_head(queue));
 312         spin_unlock_irqrestore(&queue->lock, irqL);
 313         return _SUCCESS;
 314 }
 315
 316 struct recv_buf *rtw_dequeue_recvbuf (struct __queue *queue)
 317 {
 318         unsigned long irqL;
 319         struct recv_buf *precvbuf;
 320         struct list_head *plist, *phead;
 321
 322         spin_lock_irqsave(&queue->lock, irqL);
 323
 324         if (_rtw_queue_empty(queue)) {
 325                 precvbuf = NULL;
 326         } else {
 327                 phead = get_list_head(queue);
 328
 329                 plist = phead->next;
 330
 331                 precvbuf = container_of(plist, struct recv_buf, list);
 332
 333                 rtw_list_delete(&precvbuf->list);
 334         }
 335
 336         spin_unlock_irqrestore(&queue->lock, irqL);
 337
 338         return precvbuf;
 339 }
 340
 341 static int recvframe_chkmic(struct adapter *adapter,
 342                             struct recv_frame *precvframe)
 343 {
 344         int     i, res = _SUCCESS;
 345         u32     datalen;
 346         u8      miccode[8];
 347         u8      bmic_err = false, brpt_micerror = true;
 348         u8      *pframe, *payload, *pframemic;
 349         u8      *mickey;
 350         struct  sta_info                *stainfo;
 351         struct  rx_pkt_attrib   *prxattrib = &precvframe->attrib;
 352         struct  security_priv   *psecuritypriv = &adapter->securitypriv;
 353
 354         struct mlme_ext_priv    *pmlmeext = &adapter->mlmeextpriv;
 355         struct mlme_ext_info    *pmlmeinfo = &(pmlmeext->mlmext_info);
 356
 357         stainfo = rtw_get_stainfo(&adapter->stapriv, &prxattrib->ta[0]);
 358
 359         if (prxattrib->encrypt == _TKIP_) {
 360                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n recvframe_chkmic:prxattrib->encrypt==_TKIP_\n"));
 361                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n recvframe_chkmic:da=0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x\n",
 362                          prxattrib->ra[0], prxattrib->ra[1], prxattrib->ra[2], prxattrib->ra[3], prxattrib->ra[4], prxattrib->ra[5]));
 363
 364                 /* calculate mic code */
 365                 if (stainfo != NULL) {
 366                         if (IS_MCAST(prxattrib->ra)) {
 367                                 if (!psecuritypriv) {
 368                                         res = _FAIL;
 369                                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("\n recvframe_chkmic:didn't install group key!!!!!!!!!!\n"));
 370                                         DBG_88E("\n recvframe_chkmic:didn't install group key!!!!!!!!!!\n");
 371                                         goto exit;
 372                                 }
 373                                 mickey = &psecuritypriv->dot118021XGrprxmickey[prxattrib->key_index].skey[0];
 374
 375                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n recvframe_chkmic: bcmc key\n"));
 376                         } else {
 377                                 mickey = &stainfo->dot11tkiprxmickey.skey[0];
 378                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("\n recvframe_chkmic: unicast key\n"));
 379                         }
 380
 381                         /* icv_len included the mic code */
 382                         datalen = precvframe->len-prxattrib->hdrlen -
 383                                   prxattrib->iv_len-prxattrib->icv_len-8;
 384                         pframe = precvframe->rx_data;
 385                         payload = pframe+prxattrib->hdrlen+prxattrib->iv_len;
 386
 387                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n prxattrib->iv_len=%d prxattrib->icv_len=%d\n", prxattrib->iv_len, prxattrib->icv_len));
 388                         rtw_seccalctkipmic(mickey, pframe, payload, datalen, &miccode[0],
 389                                            (unsigned char)prxattrib->priority); /* care the length of the data */
 390
 391                         pframemic = payload+datalen;
 392
 393                         bmic_err = false;
 394
 395                         for (i = 0; i < 8; i++) {
 396                                 if (miccode[i] != *(pframemic+i)) {
 397                                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
 398                                                  ("recvframe_chkmic:miccode[%d](%02x)!=*(pframemic+%d)(%02x) ",
 399                                                  i, miccode[i], i, *(pframemic+i)));
 400                                         bmic_err = true;
 401                                 }
 402                         }
 403
 404                         if (bmic_err) {
 405                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
 406                                          ("\n *(pframemic-8)-*(pframemic-1)=0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x\n",
 407                                          *(pframemic-8), *(pframemic-7), *(pframemic-6),
 408                                          *(pframemic-5), *(pframemic-4), *(pframemic-3),
 409                                          *(pframemic-2), *(pframemic-1)));
 410                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
 411                                          ("\n *(pframemic-16)-*(pframemic-9)=0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x\n",
 412                                          *(pframemic-16), *(pframemic-15), *(pframemic-14),
 413                                          *(pframemic-13), *(pframemic-12), *(pframemic-11),
 414                                          *(pframemic-10), *(pframemic-9)));
 415                                 {
 416                                         uint i;
 417                                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
 418                                                  ("\n ======demp packet (len=%d)======\n",
 419                                                  precvframe->len));
 420                                         for (i = 0; i < precvframe->len; i += 8) {
 421                                                 RT_TRACE(_module_rtl871x_recv_c_,
 422                                                          _drv_err_,
 423                                                          ("0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x",
 424                                                          *(precvframe->rx_data+i),
 425                                                          *(precvframe->rx_data+i+1),
 426                                                          *(precvframe->rx_data+i+2),
 427                                                          *(precvframe->rx_data+i+3),
 428                                                          *(precvframe->rx_data+i+4),
 429                                                          *(precvframe->rx_data+i+5),
 430                                                          *(precvframe->rx_data+i+6),
 431                                                          *(precvframe->rx_data+i+7)));
 432                                         }
 433                                         RT_TRACE(_module_rtl871x_recv_c_,
 434                                                  _drv_err_,
 435                                                  ("\n ====== demp packet end [len=%d]======\n",
 436                                                  precvframe->len));
 437                                         RT_TRACE(_module_rtl871x_recv_c_,
 438                                                  _drv_err_,
 439                                                  ("\n hrdlen=%d,\n",
 440                                                  prxattrib->hdrlen));
 441                                 }
 442
 443                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
 444                                          ("ra=0x%.2x 0x%.2x 0x%.2x 0x%.2x 0x%.2x 0x%.2x psecuritypriv->binstallGrpkey=%d ",
 445                                          prxattrib->ra[0], prxattrib->ra[1], prxattrib->ra[2],
 446                                          prxattrib->ra[3], prxattrib->ra[4], prxattrib->ra[5], psecuritypriv->binstallGrpkey));
 447
 448                                 /*  double check key_index for some timing issue , */
 449                                 /*  cannot compare with psecuritypriv->dot118021XGrpKeyid also cause timing issue */
 450                                 if ((IS_MCAST(prxattrib->ra) == true)  && (prxattrib->key_index != pmlmeinfo->key_index))
 451                                         brpt_micerror = false;
 452
 453                                 if ((prxattrib->bdecrypted) && (brpt_micerror)) {
 454                                         rtw_handle_tkip_mic_err(adapter, (u8)IS_MCAST(prxattrib->ra));
 455                                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" mic error :prxattrib->bdecrypted=%d ", prxattrib->bdecrypted));
 456                                         DBG_88E(" mic error :prxattrib->bdecrypted=%d\n", prxattrib->bdecrypted);
 457                                 } else {
 458                                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" mic error :prxattrib->bdecrypted=%d ", prxattrib->bdecrypted));
 459                                         DBG_88E(" mic error :prxattrib->bdecrypted=%d\n", prxattrib->bdecrypted);
 460                                 }
 461                                 res = _FAIL;
 462                         } else {
 463                                 /* mic checked ok */
 464                                 if ((!psecuritypriv->bcheck_grpkey) && (IS_MCAST(prxattrib->ra))) {
 465                                         psecuritypriv->bcheck_grpkey = true;
 466                                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("psecuritypriv->bcheck_grpkey = true"));
 467                                 }
 468                         }
 469                 } else {
 470                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("recvframe_chkmic: rtw_get_stainfo==NULL!!!\n"));
 471                 }
 472
 473                 recvframe_pull_tail(precvframe, 8);
 474         }
 475
 476 exit:
 477
 478
 479         return res;
 480 }
 481
 482 /* decrypt and set the ivlen, icvlen of the recv_frame */
 483 static struct recv_frame *decryptor(struct adapter *padapter,
 484                                     struct recv_frame *precv_frame)
 485 {
 486         struct rx_pkt_attrib *prxattrib = &precv_frame->attrib;
 487         struct security_priv *psecuritypriv = &padapter->securitypriv;
 488         struct recv_frame *return_packet = precv_frame;
 489         u32      res = _SUCCESS;
 490
 491         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("prxstat->decrypted=%x prxattrib->encrypt=0x%03x\n", prxattrib->bdecrypted, prxattrib->encrypt));
 492
 493         if (prxattrib->encrypt > 0) {
 494                 u8 *iv = precv_frame->rx_data+prxattrib->hdrlen;
 495                 prxattrib->key_index = (((iv[3])>>6)&0x3);
 496
 497                 if (prxattrib->key_index > WEP_KEYS) {
 498                         DBG_88E("prxattrib->key_index(%d)>WEP_KEYS\n", prxattrib->key_index);
 499
 500                         switch (prxattrib->encrypt) {
 501                         case _WEP40_:
 502                         case _WEP104_:
 503                                 prxattrib->key_index = psecuritypriv->dot11PrivacyKeyIndex;
 504                                 break;
 505                         case _TKIP_:
 506                         case _AES_:
 507                         default:
 508                                 prxattrib->key_index = psecuritypriv->dot118021XGrpKeyid;
 509                                 break;
 510                         }
 511                 }
 512         }
 513
 514         if ((prxattrib->encrypt > 0) && ((prxattrib->bdecrypted == 0) || (psecuritypriv->sw_decrypt))) {
 515                 psecuritypriv->hw_decrypted = false;
 516
 517                 switch (prxattrib->encrypt) {
 518                 case _WEP40_:
 519                 case _WEP104_:
 520                         rtw_wep_decrypt(padapter, (u8 *)precv_frame);
 521                         break;
 522                 case _TKIP_:
 523                         res = rtw_tkip_decrypt(padapter, (u8 *)precv_frame);
 524                         break;
 525                 case _AES_:
 526                         res = rtw_aes_decrypt(padapter, (u8 *)precv_frame);
 527                         break;
 528                 default:
 529                         break;
 530                 }
 531         } else if (prxattrib->bdecrypted == 1 && prxattrib->encrypt > 0 &&
 532                    (psecuritypriv->busetkipkey == 1 || prxattrib->encrypt != _TKIP_))
 533                         psecuritypriv->hw_decrypted = true;
 534
 535         if (res == _FAIL) {
 536                 rtw_free_recvframe(return_packet, &padapter->recvpriv.free_recv_queue);
 537                 return_packet = NULL;
 538         }
 539
 540
 541         return return_packet;
 542 }
 543
 544 /* set the security information in the recv_frame */
 545 static struct recv_frame *portctrl(struct adapter *adapter,
 546                                    struct recv_frame *precv_frame)
 547 {
 548         u8   *psta_addr = NULL, *ptr;
 549         uint  auth_alg;
 550         struct recv_frame *pfhdr;
 551         struct sta_info *psta;
 552         struct sta_priv *pstapriv;
 553         struct recv_frame *prtnframe;
 554         u16     ether_type = 0;
 555         u16  eapol_type = 0x888e;/* for Funia BD's WPA issue */
 556         struct rx_pkt_attrib *pattrib;
 557         __be16 be_tmp;
 558
 559
 560         pstapriv = &adapter->stapriv;
 561         psta = rtw_get_stainfo(pstapriv, psta_addr);
 562
 563         auth_alg = adapter->securitypriv.dot11AuthAlgrthm;
 564
 565         ptr = precv_frame->rx_data;
 566         pfhdr = precv_frame;
 567         pattrib = &pfhdr->attrib;
 568         psta_addr = pattrib->ta;
 569
 570         prtnframe = NULL;
 571
 572         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########portctrl:adapter->securitypriv.dot11AuthAlgrthm=%d\n", adapter->securitypriv.dot11AuthAlgrthm));
 573
 574         if (auth_alg == 2) {
 575                 if ((psta != NULL) && (psta->ieee8021x_blocked)) {
 576                         /* blocked */
 577                         /* only accept EAPOL frame */
 578                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########portctrl:psta->ieee8021x_blocked==1\n"));
 579
 580                         prtnframe = precv_frame;
 581
 582                         /* get ether_type */
 583                         ptr = ptr+pfhdr->attrib.hdrlen+pfhdr->attrib.iv_len+LLC_HEADER_SIZE;
 584                         memcpy(&be_tmp, ptr, 2);
 585                         ether_type = ntohs(be_tmp);
 586
 587                         if (ether_type == eapol_type) {
 588                                 prtnframe = precv_frame;
 589                         } else {
 590                                 /* free this frame */
 591                                 rtw_free_recvframe(precv_frame, &adapter->recvpriv.free_recv_queue);
 592                                 prtnframe = NULL;
 593                         }
 594                 } else {
 595                         /* allowed */
 596                         /* check decryption status, and decrypt the frame if needed */
 597                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########portctrl:psta->ieee8021x_blocked==0\n"));
 598                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
 599                                  ("portctrl:precv_frame->hdr.attrib.privacy=%x\n",
 600                                  precv_frame->attrib.privacy));
 601
 602                         if (pattrib->bdecrypted == 0)
 603                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("portctrl:prxstat->decrypted=%x\n", pattrib->bdecrypted));
 604
 605                         prtnframe = precv_frame;
 606                         /* check is the EAPOL frame or not (Rekey) */
 607                         if (ether_type == eapol_type) {
 608                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("########portctrl:ether_type==0x888e\n"));
 609                                 /* check Rekey */
 610
 611                                 prtnframe = precv_frame;
 612                         } else {
 613                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########portctrl:ether_type=0x%04x\n", ether_type));
 614                         }
 615                 }
 616         } else {
 617                 prtnframe = precv_frame;
 618         }
 619
 620
 621                 return prtnframe;
 622 }
 623
 624 static int recv_decache(struct recv_frame *precv_frame, u8 bretry,
 625                         struct stainfo_rxcache *prxcache)
 626 {
 627         int tid = precv_frame->attrib.priority;
 628
 629         u16 seq_ctrl = ((precv_frame->attrib.seq_num&0xffff) << 4) |
 630                 (precv_frame->attrib.frag_num & 0xf);
 631
 632
 633         if (tid > 15) {
 634                 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("recv_decache, (tid>15)! seq_ctrl=0x%x, tid=0x%x\n", seq_ctrl, tid));
 635
 636                 return _FAIL;
 637         }
 638
 639         if (1) {/* if (bretry) */
 640                 if (seq_ctrl == prxcache->tid_rxseq[tid]) {
 641                         RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("recv_decache, seq_ctrl=0x%x, tid=0x%x, tid_rxseq=0x%x\n", seq_ctrl, tid, prxcache->tid_rxseq[tid]));
 642
 643                         return _FAIL;
 644                 }
 645         }
 646
 647         prxcache->tid_rxseq[tid] = seq_ctrl;
 648
 649
 650         return _SUCCESS;
 651 }
 652
 653 void process_pwrbit_data(struct adapter *padapter,
 654                          struct recv_frame *precv_frame)
 655 {
 656 #ifdef CONFIG_88EU_AP_MODE
 657         unsigned char pwrbit;
 658         u8 *ptr = precv_frame->rx_data;
 659         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
 660         struct sta_priv *pstapriv = &padapter->stapriv;
 661         struct sta_info *psta = NULL;
 662
 663         psta = rtw_get_stainfo(pstapriv, pattrib->src);
 664
 665         pwrbit = GetPwrMgt(ptr);
 666
 667         if (psta) {
 668                 if (pwrbit) {
 669                         if (!(psta->state & WIFI_SLEEP_STATE))
 670                                 stop_sta_xmit(padapter, psta);
 671                 } else {
 672                         if (psta->state & WIFI_SLEEP_STATE)
 673                                 wakeup_sta_to_xmit(padapter, psta);
 674                 }
 675         }
 676
 677 #endif
 678 }
 679
 680 static void process_wmmps_data(struct adapter *padapter,
 681                                struct recv_frame *precv_frame)
 682 {
 683 #ifdef CONFIG_88EU_AP_MODE
 684         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
 685         struct sta_priv *pstapriv = &padapter->stapriv;
 686         struct sta_info *psta = NULL;
 687
 688         psta = rtw_get_stainfo(pstapriv, pattrib->src);
 689
 690         if (!psta)
 691                 return;
 692
 693         if (!psta->qos_option)
 694                 return;
 695
 696         if (!(psta->qos_info&0xf))
 697                 return;
 698
 699         if (psta->state&WIFI_SLEEP_STATE) {
 700                 u8 wmmps_ac = 0;
 701
 702                 switch (pattrib->priority) {
 703                 case 1:
 704                 case 2:
 705                         wmmps_ac = psta->uapsd_bk&BIT(1);
 706                         break;
 707                 case 4:
 708                 case 5:
 709                         wmmps_ac = psta->uapsd_vi&BIT(1);
 710                         break;
 711                 case 6:
 712                 case 7:
 713                         wmmps_ac = psta->uapsd_vo&BIT(1);
 714                         break;
 715                 case 0:
 716                 case 3:
 717                 default:
 718                         wmmps_ac = psta->uapsd_be&BIT(1);
 719                         break;
 720                 }
 721
 722                 if (wmmps_ac) {
 723                         if (psta->sleepq_ac_len > 0) {
 724                                 /* process received triggered frame */
 725                                 xmit_delivery_enabled_frames(padapter, psta);
 726                         } else {
 727                                 /* issue one qos null frame with More data bit = 0 and the EOSP bit set (= 1) */
 728                                 issue_qos_nulldata(padapter, psta->hwaddr, (u16)pattrib->priority, 0, 0);
 729                         }
 730                 }
 731         }
 732
 733 #endif
 734 }
 735
 736 static void count_rx_stats(struct adapter *padapter,
 737                            struct recv_frame *prframe,
 738                            struct sta_info *sta)
 739 {
 740         int     sz;
 741         struct sta_info         *psta = NULL;
 742         struct stainfo_stats    *pstats = NULL;
 743         struct rx_pkt_attrib    *pattrib = &prframe->attrib;
 744         struct recv_priv        *precvpriv = &padapter->recvpriv;
 745
 746         sz = prframe->len;
 747         precvpriv->rx_bytes += sz;
 748
 749         padapter->mlmepriv.LinkDetectInfo.NumRxOkInPeriod++;
 750
 751         if ((!MacAddr_isBcst(pattrib->dst)) && (!IS_MCAST(pattrib->dst)))
 752                 padapter->mlmepriv.LinkDetectInfo.NumRxUnicastOkInPeriod++;
 753
 754         if (sta)
 755                 psta = sta;
 756         else
 757                 psta = prframe->psta;
 758
 759         if (psta) {
 760                 pstats = &psta->sta_stats;
 761
 762                 pstats->rx_data_pkts++;
 763                 pstats->rx_bytes += sz;
 764         }
 765 }
 766
 767 int sta2sta_data_frame(
 768         struct adapter *adapter,
 769         struct recv_frame *precv_frame,
 770         struct sta_info **psta
 771 );
 772
 773 int sta2sta_data_frame(struct adapter *adapter, struct recv_frame *precv_frame,
 774                        struct sta_info **psta)
 775 {
 776         u8 *ptr = precv_frame->rx_data;
 777         int ret = _SUCCESS;
 778         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
 779         struct  sta_priv *pstapriv = &adapter->stapriv;
 780         struct  mlme_priv *pmlmepriv = &adapter->mlmepriv;
 781         u8 *mybssid  = get_bssid(pmlmepriv);
 782         u8 *myhwaddr = myid(&adapter->eeprompriv);
 783         u8 *sta_addr = NULL;
 784         int bmcast = IS_MCAST(pattrib->dst);
 785
 786
 787         if ((check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) == true) ||
 788             (check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE) == true)) {
 789                 /*  filter packets that SA is myself or multicast or broadcast */
 790                 if (!memcmp(myhwaddr, pattrib->src, ETH_ALEN)) {
 791                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" SA==myself\n"));
 792                         ret = _FAIL;
 793                         goto exit;
 794                 }
 795
 796                 if ((memcmp(myhwaddr, pattrib->dst, ETH_ALEN)) && (!bmcast)) {
 797                         ret = _FAIL;
 798                         goto exit;
 799                 }
 800
 801                 if (!memcmp(pattrib->bssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
 802                     !memcmp(mybssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
 803                     memcmp(pattrib->bssid, mybssid, ETH_ALEN)) {
 804                         ret = _FAIL;
 805                         goto exit;
 806                 }
 807
 808                 sta_addr = pattrib->src;
 809         } else if (check_fwstate(pmlmepriv, WIFI_STATION_STATE)) {
 810                 /*  For Station mode, sa and bssid should always be BSSID, and DA is my mac-address */
 811                 if (memcmp(pattrib->bssid, pattrib->src, ETH_ALEN)) {
 812                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("bssid!=TA under STATION_MODE; drop pkt\n"));
 813                         ret = _FAIL;
 814                         goto exit;
 815                 }
 816                 sta_addr = pattrib->bssid;
 817         } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
 818                 if (bmcast) {
 819                         /*  For AP mode, if DA == MCAST, then BSSID should be also MCAST */
 820                         if (!IS_MCAST(pattrib->bssid)) {
 821                                         ret = _FAIL;
 822                                         goto exit;
 823                         }
 824                 } else { /*  not mc-frame */
 825                         /*  For AP mode, if DA is non-MCAST, then it must be BSSID, and bssid == BSSID */
 826                         if (memcmp(pattrib->bssid, pattrib->dst, ETH_ALEN)) {
 827                                 ret = _FAIL;
 828                                 goto exit;
 829                         }
 830
 831                         sta_addr = pattrib->src;
 832                 }
 833         } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
 834                 memcpy(pattrib->dst, GetAddr1Ptr(ptr), ETH_ALEN);
 835                 memcpy(pattrib->src, GetAddr2Ptr(ptr), ETH_ALEN);
 836                 memcpy(pattrib->bssid, GetAddr3Ptr(ptr), ETH_ALEN);
 837                 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
 838                 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
 839
 840                 sta_addr = mybssid;
 841         } else {
 842                 ret  = _FAIL;
 843         }
 844
 845         if (bmcast)
 846                 *psta = rtw_get_bcmc_stainfo(adapter);
 847         else
 848                 *psta = rtw_get_stainfo(pstapriv, sta_addr); /*  get ap_info */
 849
 850         if (*psta == NULL) {
 851                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("can't get psta under sta2sta_data_frame ; drop pkt\n"));
 852                 if (adapter->registrypriv.mp_mode == 1) {
 853                         if (check_fwstate(pmlmepriv, WIFI_MP_STATE) == true)
 854                         adapter->mppriv.rx_pktloss++;
 855                 }
 856                 ret = _FAIL;
 857                 goto exit;
 858         }
 859
 860 exit:
 861         return ret;
 862 }
 863
 864 static int ap2sta_data_frame (
 865         struct adapter *adapter,
 866         struct recv_frame *precv_frame,
 867         struct sta_info **psta)
 868 {
 869         u8 *ptr = precv_frame->rx_data;
 870         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
 871         int ret = _SUCCESS;
 872         struct  sta_priv *pstapriv = &adapter->stapriv;
 873         struct  mlme_priv *pmlmepriv = &adapter->mlmepriv;
 874         u8 *mybssid  = get_bssid(pmlmepriv);
 875         u8 *myhwaddr = myid(&adapter->eeprompriv);
 876         int bmcast = IS_MCAST(pattrib->dst);
 877
 878
 879         if ((check_fwstate(pmlmepriv, WIFI_STATION_STATE) == true) &&
 880             (check_fwstate(pmlmepriv, _FW_LINKED) == true ||
 881             check_fwstate(pmlmepriv, _FW_UNDER_LINKING))) {
 882                 /*  filter packets that SA is myself or multicast or broadcast */
 883                 if (!memcmp(myhwaddr, pattrib->src, ETH_ALEN)) {
 884                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" SA==myself\n"));
 885                         ret = _FAIL;
 886                         goto exit;
 887                 }
 888
 889                 /*  da should be for me */
 890                 if ((memcmp(myhwaddr, pattrib->dst, ETH_ALEN)) && (!bmcast)) {
 891                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
 892                                  (" ap2sta_data_frame:  compare DA fail; DA=%pM\n", (pattrib->dst)));
 893                         ret = _FAIL;
 894                         goto exit;
 895                 }
 896
 897                 /*  check BSSID */
 898                 if (!memcmp(pattrib->bssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
 899                     !memcmp(mybssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
 900                      (memcmp(pattrib->bssid, mybssid, ETH_ALEN))) {
 901                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
 902                                  (" ap2sta_data_frame:  compare BSSID fail ; BSSID=%pM\n", (pattrib->bssid)));
 903                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("mybssid=%pM\n", (mybssid)));
 904
 905                         if (!bmcast) {
 906                                 DBG_88E("issue_deauth to the nonassociated ap=%pM for the reason(7)\n", (pattrib->bssid));
 907                                 issue_deauth(adapter, pattrib->bssid, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
 908                         }
 909
 910                         ret = _FAIL;
 911                         goto exit;
 912                 }
 913
 914                 if (bmcast)
 915                         *psta = rtw_get_bcmc_stainfo(adapter);
 916                 else
 917                         *psta = rtw_get_stainfo(pstapriv, pattrib->bssid); /*  get ap_info */
 918
 919                 if (*psta == NULL) {
 920                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("ap2sta: can't get psta under STATION_MODE ; drop pkt\n"));
 921                         ret = _FAIL;
 922                         goto exit;
 923                 }
 924
 925                 /* if ((GetFrameSubType(ptr) & WIFI_QOS_DATA_TYPE) == WIFI_QOS_DATA_TYPE) { */
 926                 /*  */
 927
 928                 if (GetFrameSubType(ptr) & BIT(6)) {
 929                         /* No data, will not indicate to upper layer, temporily count it here */
 930                         count_rx_stats(adapter, precv_frame, *psta);
 931                         ret = RTW_RX_HANDLED;
 932                         goto exit;
 933                 }
 934         } else if ((check_fwstate(pmlmepriv, WIFI_MP_STATE) == true) &&
 935                    (check_fwstate(pmlmepriv, _FW_LINKED) == true)) {
 936                 memcpy(pattrib->dst, GetAddr1Ptr(ptr), ETH_ALEN);
 937                 memcpy(pattrib->src, GetAddr2Ptr(ptr), ETH_ALEN);
 938                 memcpy(pattrib->bssid, GetAddr3Ptr(ptr), ETH_ALEN);
 939                 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
 940                 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
 941
 942                 /*  */
 943                 memcpy(pattrib->bssid,  mybssid, ETH_ALEN);
 944
 945                 *psta = rtw_get_stainfo(pstapriv, pattrib->bssid); /*  get sta_info */
 946                 if (*psta == NULL) {
 947                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("can't get psta under MP_MODE ; drop pkt\n"));
 948                         ret = _FAIL;
 949                         goto exit;
 950                 }
 951         } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
 952                 /* Special case */
 953                 ret = RTW_RX_HANDLED;
 954                 goto exit;
 955         } else {
 956                 if (!memcmp(myhwaddr, pattrib->dst, ETH_ALEN) && (!bmcast)) {
 957                         *psta = rtw_get_stainfo(pstapriv, pattrib->bssid); /*  get sta_info */
 958                         if (*psta == NULL) {
 959                                 DBG_88E("issue_deauth to the ap =%pM for the reason(7)\n", (pattrib->bssid));
 960
 961                                 issue_deauth(adapter, pattrib->bssid, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
 962                         }
 963                 }
 964
 965                 ret = _FAIL;
 966         }
 967
 968 exit:
 969
 970
 971         return ret;
 972 }
 973
 974 static int sta2ap_data_frame(struct adapter *adapter,
 975                              struct recv_frame *precv_frame,
 976                              struct sta_info **psta)
 977 {
 978         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
 979         struct  sta_priv *pstapriv = &adapter->stapriv;
 980         struct  mlme_priv *pmlmepriv = &adapter->mlmepriv;
 981         u8 *ptr = precv_frame->rx_data;
 982         unsigned char *mybssid  = get_bssid(pmlmepriv);
 983         int ret = _SUCCESS;
 984
 985
 986         if (check_fwstate(pmlmepriv, WIFI_AP_STATE) == true) {
 987                 /* For AP mode, RA = BSSID, TX = STA(SRC_ADDR), A3 = DST_ADDR */
 988                 if (memcmp(pattrib->bssid, mybssid, ETH_ALEN)) {
 989                         ret = _FAIL;
 990                         goto exit;
 991                 }
 992
 993                 *psta = rtw_get_stainfo(pstapriv, pattrib->src);
 994                 if (*psta == NULL) {
 995                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("can't get psta under AP_MODE; drop pkt\n"));
 996                         DBG_88E("issue_deauth to sta=%pM for the reason(7)\n", (pattrib->src));
 997
 998                         issue_deauth(adapter, pattrib->src, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
 999
1000                         ret = RTW_RX_HANDLED;
1001                         goto exit;
1002                 }
1003
1004                 process_pwrbit_data(adapter, precv_frame);
1005
1006                 if ((GetFrameSubType(ptr) & WIFI_QOS_DATA_TYPE) == WIFI_QOS_DATA_TYPE) {
1007                         process_wmmps_data(adapter, precv_frame);
1008                 }
1009
1010                 if (GetFrameSubType(ptr) & BIT(6)) {
1011                         /* No data, will not indicate to upper layer, temporily count it here */
1012                         count_rx_stats(adapter, precv_frame, *psta);
1013                         ret = RTW_RX_HANDLED;
1014                         goto exit;
1015                 }
1016         } else {
1017                 u8 *myhwaddr = myid(&adapter->eeprompriv);
1018                 if (memcmp(pattrib->ra, myhwaddr, ETH_ALEN)) {
1019                         ret = RTW_RX_HANDLED;
1020                         goto exit;
1021                 }
1022                 DBG_88E("issue_deauth to sta=%pM for the reason(7)\n", (pattrib->src));
1023                 issue_deauth(adapter, pattrib->src, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1024                 ret = RTW_RX_HANDLED;
1025                 goto exit;
1026         }
1027
1028 exit:
1029
1030
1031         return ret;
1032 }
1033
1034 static int validate_recv_ctrl_frame(struct adapter *padapter,
1035                                     struct recv_frame *precv_frame)
1036 {
1037 #ifdef CONFIG_88EU_AP_MODE
1038         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
1039         struct sta_priv *pstapriv = &padapter->stapriv;
1040         u8 *pframe = precv_frame->rx_data;
1041
1042         if (GetFrameType(pframe) != WIFI_CTRL_TYPE)
1043                 return _FAIL;
1044
1045         /* receive the frames that ra(a1) is my address */
1046         if (memcmp(GetAddr1Ptr(pframe), myid(&padapter->eeprompriv), ETH_ALEN))
1047                 return _FAIL;
1048
1049         /* only handle ps-poll */
1050         if (GetFrameSubType(pframe) == WIFI_PSPOLL) {
1051                 u16 aid;
1052                 u8 wmmps_ac = 0;
1053                 struct sta_info *psta = NULL;
1054
1055                 aid = GetAid(pframe);
1056                 psta = rtw_get_stainfo(pstapriv, GetAddr2Ptr(pframe));
1057
1058                 if ((psta == NULL) || (psta->aid != aid))
1059                         return _FAIL;
1060
1061                 /* for rx pkt statistics */
1062                 psta->sta_stats.rx_ctrl_pkts++;
1063
1064                 switch (pattrib->priority) {
1065                 case 1:
1066                 case 2:
1067                         wmmps_ac = psta->uapsd_bk&BIT(0);
1068                         break;
1069                 case 4:
1070                 case 5:
1071                         wmmps_ac = psta->uapsd_vi&BIT(0);
1072                         break;
1073                 case 6:
1074                 case 7:
1075                         wmmps_ac = psta->uapsd_vo&BIT(0);
1076                         break;
1077                 case 0:
1078                 case 3:
1079                 default:
1080                         wmmps_ac = psta->uapsd_be&BIT(0);
1081                         break;
1082                 }
1083
1084                 if (wmmps_ac)
1085                         return _FAIL;
1086
1087                 if (psta->state & WIFI_STA_ALIVE_CHK_STATE) {
1088                         DBG_88E("%s alive check-rx ps-poll\n", __func__);
1089                         psta->expire_to = pstapriv->expire_to;
1090                         psta->state ^= WIFI_STA_ALIVE_CHK_STATE;
1091                 }
1092
1093                 if ((psta->state&WIFI_SLEEP_STATE) && (pstapriv->sta_dz_bitmap&BIT(psta->aid))) {
1094                         struct list_head *xmitframe_plist, *xmitframe_phead;
1095                         struct xmit_frame *pxmitframe = NULL;
1096
1097                         spin_lock_bh(&psta->sleep_q.lock);
1098
1099                         xmitframe_phead = get_list_head(&psta->sleep_q);
1100                         xmitframe_plist = xmitframe_phead->next;
1101
1102                         if ((rtw_end_of_queue_search(xmitframe_phead, xmitframe_plist)) == false) {
1103                                 pxmitframe = container_of(xmitframe_plist, struct xmit_frame, list);
1104
1105                                 xmitframe_plist = xmitframe_plist->next;
1106
1107                                 rtw_list_delete(&pxmitframe->list);
1108
1109                                 psta->sleepq_len--;
1110
1111                                 if (psta->sleepq_len > 0)
1112                                         pxmitframe->attrib.mdata = 1;
1113                                 else
1114                                         pxmitframe->attrib.mdata = 0;
1115
1116                                 pxmitframe->attrib.triggered = 1;
1117
1118                                 spin_unlock_bh(&psta->sleep_q.lock);
1119                                 if (rtw_hal_xmit(padapter, pxmitframe) == true)
1120                                         rtw_os_xmit_complete(padapter, pxmitframe);
1121                                 spin_lock_bh(&psta->sleep_q.lock);
1122
1123                                 if (psta->sleepq_len == 0) {
1124                                         pstapriv->tim_bitmap &= ~BIT(psta->aid);
1125
1126                                         /* update BCN for TIM IE */
1127                                         /* update_BCNTIM(padapter); */
1128                                         update_beacon(padapter, _TIM_IE_, NULL, false);
1129                                 }
1130                         } else {
1131                                 if (pstapriv->tim_bitmap&BIT(psta->aid)) {
1132                                         if (psta->sleepq_len == 0) {
1133                                                 DBG_88E("no buffered packets to xmit\n");
1134
1135                                                 /* issue nulldata with More data bit = 0 to indicate we have no buffered packets */
1136                                                 issue_nulldata(padapter, psta->hwaddr, 0, 0, 0);
1137                                         } else {
1138                                                 DBG_88E("error!psta->sleepq_len=%d\n", psta->sleepq_len);
1139                                                 psta->sleepq_len = 0;
1140                                         }
1141
1142                                         pstapriv->tim_bitmap &= ~BIT(psta->aid);
1143
1144                                         /* update BCN for TIM IE */
1145                                         /* update_BCNTIM(padapter); */
1146                                         update_beacon(padapter, _TIM_IE_, NULL, false);
1147                                 }
1148                         }
1149
1150                         spin_unlock_bh(&psta->sleep_q.lock);
1151                 }
1152         }
1153
1154 #endif
1155
1156         return _FAIL;
1157 }
1158
1159 struct recv_frame *recvframe_chk_defrag(struct adapter *padapter,
1160                                         struct recv_frame *precv_frame);
1161
1162 static int validate_recv_mgnt_frame(struct adapter *padapter,
1163                                     struct recv_frame *precv_frame)
1164 {
1165         struct sta_info *psta;
1166
1167         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("+validate_recv_mgnt_frame\n"));
1168
1169         precv_frame = recvframe_chk_defrag(padapter, precv_frame);
1170         if (precv_frame == NULL) {
1171                 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("%s: fragment packet\n", __func__));
1172                 return _SUCCESS;
1173         }
1174
1175         /* for rx pkt statistics */
1176         psta = rtw_get_stainfo(&padapter->stapriv,
1177                                GetAddr2Ptr(precv_frame->rx_data));
1178         if (psta) {
1179                 psta->sta_stats.rx_mgnt_pkts++;
1180                 if (GetFrameSubType(precv_frame->rx_data) == WIFI_BEACON) {
1181                         psta->sta_stats.rx_beacon_pkts++;
1182                 } else if (GetFrameSubType(precv_frame->rx_data) == WIFI_PROBEREQ) {
1183                         psta->sta_stats.rx_probereq_pkts++;
1184                 } else if (GetFrameSubType(precv_frame->rx_data) == WIFI_PROBERSP) {
1185                         if (!memcmp(padapter->eeprompriv.mac_addr,
1186                                     GetAddr1Ptr(precv_frame->rx_data), ETH_ALEN))
1187                                 psta->sta_stats.rx_probersp_pkts++;
1188                         else if (is_broadcast_mac_addr(GetAddr1Ptr(precv_frame->rx_data)) ||
1189                                  is_multicast_mac_addr(GetAddr1Ptr(precv_frame->rx_data)))
1190                                 psta->sta_stats.rx_probersp_bm_pkts++;
1191                         else
1192                                 psta->sta_stats.rx_probersp_uo_pkts++;
1193                 }
1194         }
1195
1196         mgt_dispatcher(padapter, precv_frame);
1197
1198         return _SUCCESS;
1199 }
1200
1201 static int validate_recv_data_frame(struct adapter *adapter,
1202                                     struct recv_frame *precv_frame)
1203 {
1204         u8 bretry;
1205         u8 *psa, *pda, *pbssid;
1206         struct sta_info *psta = NULL;
1207         u8 *ptr = precv_frame->rx_data;
1208         struct rx_pkt_attrib    *pattrib = &precv_frame->attrib;
1209         struct security_priv    *psecuritypriv = &adapter->securitypriv;
1210         int ret = _SUCCESS;
1211
1212
1213         bretry = GetRetry(ptr);
1214         pda = get_da(ptr);
1215         psa = get_sa(ptr);
1216         pbssid = get_hdr_bssid(ptr);
1217
1218         if (pbssid == NULL) {
1219                 ret = _FAIL;
1220                 goto exit;
1221         }
1222
1223         memcpy(pattrib->dst, pda, ETH_ALEN);
1224         memcpy(pattrib->src, psa, ETH_ALEN);
1225
1226         memcpy(pattrib->bssid, pbssid, ETH_ALEN);
1227
1228         switch (pattrib->to_fr_ds) {
1229         case 0:
1230                 memcpy(pattrib->ra, pda, ETH_ALEN);
1231                 memcpy(pattrib->ta, psa, ETH_ALEN);
1232                 ret = sta2sta_data_frame(adapter, precv_frame, &psta);
1233                 break;
1234         case 1:
1235                 memcpy(pattrib->ra, pda, ETH_ALEN);
1236                 memcpy(pattrib->ta, pbssid, ETH_ALEN);
1237                 ret = ap2sta_data_frame(adapter, precv_frame, &psta);
1238                 break;
1239         case 2:
1240                 memcpy(pattrib->ra, pbssid, ETH_ALEN);
1241                 memcpy(pattrib->ta, psa, ETH_ALEN);
1242                 ret = sta2ap_data_frame(adapter, precv_frame, &psta);
1243                 break;
1244         case 3:
1245                 memcpy(pattrib->ra, GetAddr1Ptr(ptr), ETH_ALEN);
1246                 memcpy(pattrib->ta, GetAddr2Ptr(ptr), ETH_ALEN);
1247                 ret = _FAIL;
1248                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" case 3\n"));
1249                 break;
1250         default:
1251                 ret = _FAIL;
1252                 break;
1253         }
1254
1255         if (ret == _FAIL) {
1256                 goto exit;
1257         } else if (ret == RTW_RX_HANDLED) {
1258                 goto exit;
1259         }
1260
1261         if (psta == NULL) {
1262                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" after to_fr_ds_chk; psta==NULL\n"));
1263                 ret = _FAIL;
1264                 goto exit;
1265         }
1266
1267         /* psta->rssi = prxcmd->rssi; */
1268         /* psta->signal_quality = prxcmd->sq; */
1269         precv_frame->psta = psta;
1270
1271         pattrib->amsdu = 0;
1272         pattrib->ack_policy = 0;
1273         /* parsing QC field */
1274         if (pattrib->qos == 1) {
1275                 pattrib->priority = GetPriority((ptr + 24));
1276                 pattrib->ack_policy = GetAckpolicy((ptr + 24));
1277                 pattrib->amsdu = GetAMsdu((ptr + 24));
1278                 pattrib->hdrlen = pattrib->to_fr_ds == 3 ? 32 : 26;
1279
1280                 if (pattrib->priority != 0 && pattrib->priority != 3)
1281                         adapter->recvpriv.bIsAnyNonBEPkts = true;
1282         } else {
1283                 pattrib->priority = 0;
1284                 pattrib->hdrlen = pattrib->to_fr_ds == 3 ? 30 : 24;
1285         }
1286
1287         if (pattrib->order)/* HT-CTRL 11n */
1288                 pattrib->hdrlen += 4;
1289
1290         precv_frame->preorder_ctrl = &psta->recvreorder_ctrl[pattrib->priority];
1291
1292         /*  decache, drop duplicate recv packets */
1293         if (recv_decache(precv_frame, bretry, &psta->sta_recvpriv.rxcache) == _FAIL) {
1294                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("decache : drop pkt\n"));
1295                 ret = _FAIL;
1296                 goto exit;
1297         }
1298
1299         if (pattrib->privacy) {
1300                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("validate_recv_data_frame:pattrib->privacy=%x\n", pattrib->privacy));
1301                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n ^^^^^^^^^^^IS_MCAST(pattrib->ra(0x%02x))=%d^^^^^^^^^^^^^^^6\n", pattrib->ra[0], IS_MCAST(pattrib->ra)));
1302
1303                 GET_ENCRY_ALGO(psecuritypriv, psta, pattrib->encrypt, IS_MCAST(pattrib->ra));
1304
1305                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n pattrib->encrypt=%d\n", pattrib->encrypt));
1306
1307                 SET_ICE_IV_LEN(pattrib->iv_len, pattrib->icv_len, pattrib->encrypt);
1308         } else {
1309                 pattrib->encrypt = 0;
1310                 pattrib->iv_len = 0;
1311                 pattrib->icv_len = 0;
1312         }
1313
1314 exit:
1315
1316
1317         return ret;
1318 }
1319
1320 static int validate_recv_frame(struct adapter *adapter,
1321                                struct recv_frame *precv_frame)
1322 {
1323         /* shall check frame subtype, to / from ds, da, bssid */
1324
1325         /* then call check if rx seq/frag. duplicated. */
1326
1327         u8 type;
1328         u8 subtype;
1329         int retval = _SUCCESS;
1330         u8 bDumpRxPkt;
1331         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
1332         u8 *ptr = precv_frame->rx_data;
1333         u8  ver = (unsigned char) (*ptr)&0x3;
1334         struct mlme_ext_priv *pmlmeext = &adapter->mlmeextpriv;
1335
1336
1337         if (pmlmeext->sitesurvey_res.state == SCAN_PROCESS) {
1338                 int ch_set_idx = rtw_ch_set_search_ch(pmlmeext->channel_set, rtw_get_oper_ch(adapter));
1339                 if (ch_set_idx >= 0)
1340                         pmlmeext->channel_set[ch_set_idx].rx_count++;
1341         }
1342
1343         /* add version chk */
1344         if (ver != 0) {
1345                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("validate_recv_data_frame fail! (ver!=0)\n"));
1346                 retval = _FAIL;
1347                 goto exit;
1348         }
1349
1350         type =  GetFrameType(ptr);
1351         subtype = GetFrameSubType(ptr); /* bit(7)~bit(2) */
1352
1353         pattrib->to_fr_ds = get_tofr_ds(ptr);
1354
1355         pattrib->frag_num = GetFragNum(ptr);
1356         pattrib->seq_num = GetSequence(ptr);
1357
1358         pattrib->pw_save = GetPwrMgt(ptr);
1359         pattrib->mfrag = GetMFrag(ptr);
1360         pattrib->mdata = GetMData(ptr);
1361         pattrib->privacy = GetPrivacy(ptr);
1362         pattrib->order = GetOrder(ptr);
1363
1364         /* Dump rx packets */
1365         rtw_hal_get_def_var(adapter, HAL_DEF_DBG_DUMP_RXPKT, &(bDumpRxPkt));
1366         if (bDumpRxPkt == 1) {/* dump all rx packets */
1367                 int i;
1368                 DBG_88E("#############################\n");
1369
1370                 for (i = 0; i < 64; i = i+8)
1371                         DBG_88E("%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:\n", *(ptr+i),
1372                                 *(ptr+i+1), *(ptr+i+2), *(ptr+i+3), *(ptr+i+4), *(ptr+i+5), *(ptr+i+6), *(ptr+i+7));
1373                 DBG_88E("#############################\n");
1374         } else if (bDumpRxPkt == 2) {
1375                 if (type == WIFI_MGT_TYPE) {
1376                         int i;
1377                         DBG_88E("#############################\n");
1378
1379                         for (i = 0; i < 64; i = i+8)
1380                                 DBG_88E("%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:\n", *(ptr+i),
1381                                         *(ptr+i+1), *(ptr+i+2), *(ptr+i+3), *(ptr+i+4), *(ptr+i+5), *(ptr+i+6), *(ptr+i+7));
1382                         DBG_88E("#############################\n");
1383                 }
1384         } else if (bDumpRxPkt == 3) {
1385                 if (type == WIFI_DATA_TYPE) {
1386                         int i;
1387                         DBG_88E("#############################\n");
1388
1389                         for (i = 0; i < 64; i = i+8)
1390                                 DBG_88E("%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:\n", *(ptr+i),
1391                                         *(ptr+i+1), *(ptr+i+2), *(ptr+i+3), *(ptr+i+4), *(ptr+i+5), *(ptr+i+6), *(ptr+i+7));
1392                         DBG_88E("#############################\n");
1393                 }
1394         }
1395         switch (type) {
1396         case WIFI_MGT_TYPE: /* mgnt */
1397                 retval = validate_recv_mgnt_frame(adapter, precv_frame);
1398                 if (retval == _FAIL)
1399                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("validate_recv_mgnt_frame fail\n"));
1400                 retval = _FAIL; /*  only data frame return _SUCCESS */
1401                 break;
1402         case WIFI_CTRL_TYPE: /* ctrl */
1403                 retval = validate_recv_ctrl_frame(adapter, precv_frame);
1404                 if (retval == _FAIL)
1405                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("validate_recv_ctrl_frame fail\n"));
1406                 retval = _FAIL; /*  only data frame return _SUCCESS */
1407                 break;
1408         case WIFI_DATA_TYPE: /* data */
1409                 rtw_led_control(adapter, LED_CTL_RX);
1410                 pattrib->qos = (subtype & BIT(7)) ? 1 : 0;
1411                 retval = validate_recv_data_frame(adapter, precv_frame);
1412                 if (retval == _FAIL) {
1413                         struct recv_priv *precvpriv = &adapter->recvpriv;
1414                         precvpriv->rx_drop++;
1415                 }
1416                 break;
1417         default:
1418                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("validate_recv_data_frame fail! type= 0x%x\n", type));
1419                 retval = _FAIL;
1420                 break;
1421         }
1422
1423 exit:
1424
1425
1426         return retval;
1427 }
1428
1429 /* remove the wlanhdr and add the eth_hdr */
1430
1431 static int wlanhdr_to_ethhdr(struct recv_frame *precvframe)
1432 {
1433         int     rmv_len;
1434         u16     eth_type, len;
1435         __be16 be_tmp;
1436         u8      bsnaphdr;
1437         u8      *psnap_type;
1438         struct ieee80211_snap_hdr       *psnap;
1439
1440         int ret = _SUCCESS;
1441         struct adapter          *adapter = precvframe->adapter;
1442         struct mlme_priv        *pmlmepriv = &adapter->mlmepriv;
1443         u8 *ptr = precvframe->rx_data;
1444         struct rx_pkt_attrib *pattrib = &precvframe->attrib;
1445
1446         if (pattrib->encrypt)
1447                 recvframe_pull_tail(precvframe, pattrib->icv_len);
1448
1449         psnap = (struct ieee80211_snap_hdr *)(ptr+pattrib->hdrlen + pattrib->iv_len);
1450         psnap_type = ptr+pattrib->hdrlen + pattrib->iv_len+SNAP_SIZE;
1451         /* convert hdr + possible LLC headers into Ethernet header */
1452         if ((!memcmp(psnap, rtw_rfc1042_header, SNAP_SIZE) &&
1453              (!memcmp(psnap_type, SNAP_ETH_TYPE_IPX, 2) == false) &&
1454              (!memcmp(psnap_type, SNAP_ETH_TYPE_APPLETALK_AARP, 2) == false)) ||
1455              !memcmp(psnap, rtw_bridge_tunnel_header, SNAP_SIZE)) {
1456                 /* remove RFC1042 or Bridge-Tunnel encapsulation and replace EtherType */
1457                 bsnaphdr = true;
1458         } else {
1459                 /* Leave Ethernet header part of hdr and full payload */
1460                 bsnaphdr = false;
1461         }
1462
1463         rmv_len = pattrib->hdrlen + pattrib->iv_len + (bsnaphdr ? SNAP_SIZE : 0);
1464         len = precvframe->len - rmv_len;
1465
1466         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
1467                  ("\n===pattrib->hdrlen: %x,  pattrib->iv_len:%x===\n\n", pattrib->hdrlen,  pattrib->iv_len));
1468
1469         memcpy(&be_tmp, ptr+rmv_len, 2);
1470         eth_type = ntohs(be_tmp); /* pattrib->ether_type */
1471         pattrib->eth_type = eth_type;
1472
1473         if ((check_fwstate(pmlmepriv, WIFI_MP_STATE))) {
1474                 ptr += rmv_len;
1475                 *ptr = 0x87;
1476                 *(ptr+1) = 0x12;
1477
1478                 eth_type = 0x8712;
1479                 /*  append rx status for mp test packets */
1480                 ptr = recvframe_pull(precvframe, (rmv_len-sizeof(struct ethhdr)+2)-24);
1481                 memcpy(ptr, get_rxmem(precvframe), 24);
1482                 ptr += 24;
1483         } else {
1484                 ptr = recvframe_pull(precvframe, (rmv_len-sizeof(struct ethhdr) + (bsnaphdr ? 2 : 0)));
1485         }
1486
1487         memcpy(ptr, pattrib->dst, ETH_ALEN);
1488         memcpy(ptr+ETH_ALEN, pattrib->src, ETH_ALEN);
1489
1490         if (!bsnaphdr) {
1491                 be_tmp = htons(len);
1492                 memcpy(ptr+12, &be_tmp, 2);
1493         }
1494
1495         return ret;
1496 }
1497
1498 /* perform defrag */
1499 static struct recv_frame *recvframe_defrag(struct adapter *adapter,
1500                                            struct __queue *defrag_q)
1501 {
1502         struct list_head *plist, *phead;
1503         u8 wlanhdr_offset;
1504         u8      curfragnum;
1505         struct recv_frame *pfhdr, *pnfhdr;
1506         struct recv_frame *prframe, *pnextrframe;
1507         struct __queue *pfree_recv_queue;
1508
1509
1510         curfragnum = 0;
1511         pfree_recv_queue = &adapter->recvpriv.free_recv_queue;
1512
1513         phead = get_list_head(defrag_q);
1514         plist = phead->next;
1515         pfhdr = container_of(plist, struct recv_frame, list);
1516         prframe = (struct recv_frame *)pfhdr;
1517         rtw_list_delete(&(prframe->list));
1518
1519         if (curfragnum != pfhdr->attrib.frag_num) {
1520                 /* the first fragment number must be 0 */
1521                 /* free the whole queue */
1522                 rtw_free_recvframe(prframe, pfree_recv_queue);
1523                 rtw_free_recvframe_queue(defrag_q, pfree_recv_queue);
1524
1525                 return NULL;
1526         }
1527
1528         curfragnum++;
1529
1530         plist = get_list_head(defrag_q);
1531
1532         plist = plist->next;
1533
1534         while (rtw_end_of_queue_search(phead, plist) == false) {
1535                 pnfhdr = container_of(plist, struct recv_frame, list);
1536                 pnextrframe = (struct recv_frame *)pnfhdr;
1537
1538                 /* check the fragment sequence  (2nd ~n fragment frame) */
1539
1540                 if (curfragnum != pnfhdr->attrib.frag_num) {
1541                         /* the fragment number must be increasing  (after decache) */
1542                         /* release the defrag_q & prframe */
1543                         rtw_free_recvframe(prframe, pfree_recv_queue);
1544                         rtw_free_recvframe_queue(defrag_q, pfree_recv_queue);
1545                         return NULL;
1546                 }
1547
1548                 curfragnum++;
1549
1550                 /* copy the 2nd~n fragment frame's payload to the first fragment */
1551                 /* get the 2nd~last fragment frame's payload */
1552
1553                 wlanhdr_offset = pnfhdr->attrib.hdrlen + pnfhdr->attrib.iv_len;
1554
1555                 recvframe_pull(pnextrframe, wlanhdr_offset);
1556
1557                 /* append  to first fragment frame's tail (if privacy frame, pull the ICV) */
1558                 recvframe_pull_tail(prframe, pfhdr->attrib.icv_len);
1559
1560                 /* memcpy */
1561                 memcpy(pfhdr->rx_tail, pnfhdr->rx_data, pnfhdr->len);
1562
1563                 recvframe_put(prframe, pnfhdr->len);
1564
1565                 pfhdr->attrib.icv_len = pnfhdr->attrib.icv_len;
1566                 plist = plist->next;
1567         }
1568
1569         /* free the defrag_q queue and return the prframe */
1570         rtw_free_recvframe_queue(defrag_q, pfree_recv_queue);
1571
1572         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("Performance defrag!!!!!\n"));
1573
1574
1575         return prframe;
1576 }
1577
1578 /* check if need to defrag, if needed queue the frame to defrag_q */
1579 struct recv_frame *recvframe_chk_defrag(struct adapter *padapter,
1580                                         struct recv_frame *precv_frame)
1581 {
1582         u8      ismfrag;
1583         u8      fragnum;
1584         u8      *psta_addr;
1585         struct recv_frame *pfhdr;
1586         struct sta_info *psta;
1587         struct sta_priv *pstapriv;
1588         struct list_head *phead;
1589         struct recv_frame *prtnframe = NULL;
1590         struct __queue *pfree_recv_queue, *pdefrag_q;
1591
1592
1593         pstapriv = &padapter->stapriv;
1594
1595         pfhdr = precv_frame;
1596
1597         pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
1598
1599         /* need to define struct of wlan header frame ctrl */
1600         ismfrag = pfhdr->attrib.mfrag;
1601         fragnum = pfhdr->attrib.frag_num;
1602
1603         psta_addr = pfhdr->attrib.ta;
1604         psta = rtw_get_stainfo(pstapriv, psta_addr);
1605         if (psta == NULL) {
1606                 u8 type = GetFrameType(pfhdr->rx_data);
1607                 if (type != WIFI_DATA_TYPE) {
1608                         psta = rtw_get_bcmc_stainfo(padapter);
1609                         pdefrag_q = &psta->sta_recvpriv.defrag_q;
1610                 } else {
1611                         pdefrag_q = NULL;
1612                 }
1613         } else {
1614                 pdefrag_q = &psta->sta_recvpriv.defrag_q;
1615         }
1616
1617         if ((ismfrag == 0) && (fragnum == 0))
1618                 prtnframe = precv_frame;/* isn't a fragment frame */
1619
1620         if (ismfrag == 1) {
1621                 /* 0~(n-1) fragment frame */
1622                 /* enqueue to defraf_g */
1623                 if (pdefrag_q != NULL) {
1624                         if (fragnum == 0) {
1625                                 /* the first fragment */
1626                                 if (_rtw_queue_empty(pdefrag_q) == false) {
1627                                         /* free current defrag_q */
1628                                         rtw_free_recvframe_queue(pdefrag_q, pfree_recv_queue);
1629                                 }
1630                         }
1631
1632                         /* Then enqueue the 0~(n-1) fragment into the defrag_q */
1633
1634                         phead = get_list_head(pdefrag_q);
1635                         rtw_list_insert_tail(&pfhdr->list, phead);
1636
1637                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("Enqueuq: ismfrag=%d, fragnum=%d\n", ismfrag, fragnum));
1638
1639                         prtnframe = NULL;
1640                 } else {
1641                         /* can't find this ta's defrag_queue, so free this recv_frame */
1642                         rtw_free_recvframe(precv_frame, pfree_recv_queue);
1643                         prtnframe = NULL;
1644                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("Free because pdefrag_q==NULL: ismfrag=%d, fragnum=%d\n", ismfrag, fragnum));
1645                 }
1646         }
1647
1648         if ((ismfrag == 0) && (fragnum != 0)) {
1649                 /* the last fragment frame */
1650                 /* enqueue the last fragment */
1651                 if (pdefrag_q != NULL) {
1652                         phead = get_list_head(pdefrag_q);
1653                         rtw_list_insert_tail(&pfhdr->list, phead);
1654
1655                         /* call recvframe_defrag to defrag */
1656                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("defrag: ismfrag=%d, fragnum=%d\n", ismfrag, fragnum));
1657                         precv_frame = recvframe_defrag(padapter, pdefrag_q);
1658                         prtnframe = precv_frame;
1659                 } else {
1660                         /* can't find this ta's defrag_queue, so free this recv_frame */
1661                         rtw_free_recvframe(precv_frame, pfree_recv_queue);
1662                         prtnframe = NULL;
1663                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("Free because pdefrag_q==NULL: ismfrag=%d, fragnum=%d\n", ismfrag, fragnum));
1664                 }
1665         }
1666
1667         if ((prtnframe != NULL) && (prtnframe->attrib.privacy)) {
1668                 /* after defrag we must check tkip mic code */
1669                 if (recvframe_chkmic(padapter,  prtnframe) == _FAIL) {
1670                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("recvframe_chkmic(padapter,  prtnframe)==_FAIL\n"));
1671                         rtw_free_recvframe(prtnframe, pfree_recv_queue);
1672                         prtnframe = NULL;
1673                 }
1674         }
1675
1676
1677         return prtnframe;
1678 }
1679
1680 static int amsdu_to_msdu(struct adapter *padapter, struct recv_frame *prframe)
1681 {
1682         int     a_len, padding_len;
1683         u16     eth_type, nSubframe_Length;
1684         u8      nr_subframes, i;
1685         unsigned char *pdata;
1686         struct rx_pkt_attrib *pattrib;
1687         unsigned char *data_ptr;
1688         struct sk_buff *sub_skb, *subframes[MAX_SUBFRAME_COUNT];
1689         struct recv_priv *precvpriv = &padapter->recvpriv;
1690         struct __queue *pfree_recv_queue = &(precvpriv->free_recv_queue);
1691         int     ret = _SUCCESS;
1692         nr_subframes = 0;
1693
1694         pattrib = &prframe->attrib;
1695
1696         recvframe_pull(prframe, prframe->attrib.hdrlen);
1697
1698         if (prframe->attrib.iv_len > 0)
1699                 recvframe_pull(prframe, prframe->attrib.iv_len);
1700
1701         a_len = prframe->len;
1702
1703         pdata = prframe->rx_data;
1704
1705         while (a_len > ETH_HLEN) {
1706                 /* Offset 12 denote 2 mac address */
1707                 nSubframe_Length = RTW_GET_BE16(pdata + 12);
1708
1709                 if (a_len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) {
1710                         DBG_88E("nRemain_Length is %d and nSubframe_Length is : %d\n", a_len, nSubframe_Length);
1711                         goto exit;
1712                 }
1713
1714                 /* move the data point to data content */
1715                 pdata += ETH_HLEN;
1716                 a_len -= ETH_HLEN;
1717
1718                 /* Allocate new skb for releasing to upper layer */
1719                 sub_skb = dev_alloc_skb(nSubframe_Length + 12);
1720                 if (sub_skb) {
1721                         skb_reserve(sub_skb, 12);
1722                         data_ptr = (u8 *)skb_put(sub_skb, nSubframe_Length);
1723                         memcpy(data_ptr, pdata, nSubframe_Length);
1724                 } else {
1725                         sub_skb = skb_clone(prframe->pkt, GFP_ATOMIC);
1726                         if (sub_skb) {
1727                                 sub_skb->data = pdata;
1728                                 sub_skb->len = nSubframe_Length;
1729                                 skb_set_tail_pointer(sub_skb, nSubframe_Length);
1730                         } else {
1731                                 DBG_88E("skb_clone() Fail!!! , nr_subframes=%d\n", nr_subframes);
1732                                 break;
1733                         }
1734                 }
1735
1736                 subframes[nr_subframes++] = sub_skb;
1737
1738                 if (nr_subframes >= MAX_SUBFRAME_COUNT) {
1739                         DBG_88E("ParseSubframe(): Too many Subframes! Packets dropped!\n");
1740                         break;
1741                 }
1742
1743                 pdata += nSubframe_Length;
1744                 a_len -= nSubframe_Length;
1745                 if (a_len != 0) {
1746                         padding_len = 4 - ((nSubframe_Length + ETH_HLEN) & (4-1));
1747                         if (padding_len == 4) {
1748                                 padding_len = 0;
1749                         }
1750
1751                         if (a_len < padding_len) {
1752                                 goto exit;
1753                         }
1754                         pdata += padding_len;
1755                         a_len -= padding_len;
1756                 }
1757         }
1758
1759         for (i = 0; i < nr_subframes; i++) {
1760                 sub_skb = subframes[i];
1761                 /* convert hdr + possible LLC headers into Ethernet header */
1762                 eth_type = RTW_GET_BE16(&sub_skb->data[6]);
1763                 if (sub_skb->len >= 8 &&
1764                     ((!memcmp(sub_skb->data, rtw_rfc1042_header, SNAP_SIZE) &&
1765                           eth_type != ETH_P_AARP && eth_type != ETH_P_IPX) ||
1766                          !memcmp(sub_skb->data, rtw_bridge_tunnel_header, SNAP_SIZE))) {
1767                         /* remove RFC1042 or Bridge-Tunnel encapsulation and replace EtherType */
1768                         skb_pull(sub_skb, SNAP_SIZE);
1769                         memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src, ETH_ALEN);
1770                         memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst, ETH_ALEN);
1771                 } else {
1772                         __be16 len;
1773                         /* Leave Ethernet header part of hdr and full payload */
1774                         len = htons(sub_skb->len);
1775                         memcpy(skb_push(sub_skb, 2), &len, 2);
1776                         memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src, ETH_ALEN);
1777                         memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst, ETH_ALEN);
1778                 }
1779
1780                 /* Indicate the packets to upper layer */
1781                 /*  Insert NAT2.5 RX here! */
1782                 sub_skb->protocol = eth_type_trans(sub_skb, padapter->pnetdev);
1783                 sub_skb->dev = padapter->pnetdev;
1784
1785                 sub_skb->ip_summed = CHECKSUM_NONE;
1786
1787                 netif_rx(sub_skb);
1788         }
1789
1790 exit:
1791
1792         prframe->len = 0;
1793         rtw_free_recvframe(prframe, pfree_recv_queue);/* free this recv_frame */
1794
1795         return ret;
1796 }
1797
1798 static int check_indicate_seq(struct recv_reorder_ctrl *preorder_ctrl, u16 seq_num)
1799 {
1800         u8      wsize = preorder_ctrl->wsize_b;
1801         u16     wend = (preorder_ctrl->indicate_seq + wsize - 1) & 0xFFF;/*  4096; */
1802
1803         /*  Rx Reorder initialize condition. */
1804         if (preorder_ctrl->indicate_seq == 0xFFFF)
1805                 preorder_ctrl->indicate_seq = seq_num;
1806
1807         /*  Drop out the packet which SeqNum is smaller than WinStart */
1808         if (SN_LESS(seq_num, preorder_ctrl->indicate_seq))
1809                 return false;
1810
1811         /*  */
1812         /*  Sliding window manipulation. Conditions includes: */
1813         /*  1. Incoming SeqNum is equal to WinStart =>Window shift 1 */
1814         /*  2. Incoming SeqNum is larger than the WinEnd => Window shift N */
1815         /*  */
1816         if (SN_EQUAL(seq_num, preorder_ctrl->indicate_seq)) {
1817                 preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1) & 0xFFF;
1818         } else if (SN_LESS(wend, seq_num)) {
1819                 if (seq_num >= (wsize - 1))
1820                         preorder_ctrl->indicate_seq = seq_num + 1 - wsize;
1821                 else
1822                         preorder_ctrl->indicate_seq = 0xFFF - (wsize - (seq_num + 1)) + 1;
1823         }
1824
1825         return true;
1826 }
1827
1828 int enqueue_reorder_recvframe(struct recv_reorder_ctrl *preorder_ctrl,
1829                               struct recv_frame *prframe)
1830 {
1831         struct rx_pkt_attrib *pattrib = &prframe->attrib;
1832         struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
1833         struct list_head *phead, *plist;
1834         struct recv_frame *hdr;
1835         struct rx_pkt_attrib *pnextattrib;
1836
1837         phead = get_list_head(ppending_recvframe_queue);
1838         plist = phead->next;
1839
1840         while (rtw_end_of_queue_search(phead, plist) == false) {
1841                 hdr = container_of(plist, struct recv_frame, list);
1842                 pnextattrib = &hdr->attrib;
1843
1844                 if (SN_LESS(pnextattrib->seq_num, pattrib->seq_num))
1845                         plist = plist->next;
1846                 else if (SN_EQUAL(pnextattrib->seq_num, pattrib->seq_num))
1847                         return false;
1848                 else
1849                         break;
1850         }
1851
1852         rtw_list_delete(&(prframe->list));
1853
1854         rtw_list_insert_tail(&(prframe->list), plist);
1855         return true;
1856 }
1857
1858 static int recv_indicatepkts_in_order(struct adapter *padapter, struct recv_reorder_ctrl *preorder_ctrl, int bforced)
1859 {
1860         struct list_head *phead, *plist;
1861         struct recv_frame *prframe;
1862         struct recv_frame *prhdr;
1863         struct rx_pkt_attrib *pattrib;
1864         int bPktInBuf = false;
1865         struct recv_priv *precvpriv = &padapter->recvpriv;
1866         struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
1867
1868         phead =         get_list_head(ppending_recvframe_queue);
1869         plist = phead->next;
1870
1871         /*  Handling some condition for forced indicate case. */
1872         if (bforced) {
1873                 if (rtw_is_list_empty(phead))
1874                         return true;
1875
1876                 prhdr = container_of(plist, struct recv_frame, list);
1877                 pattrib = &prhdr->attrib;
1878                 preorder_ctrl->indicate_seq = pattrib->seq_num;
1879         }
1880
1881         /*  Prepare indication list and indication. */
1882         /*  Check if there is any packet need indicate. */
1883         while (!rtw_is_list_empty(phead)) {
1884                 prhdr = container_of(plist, struct recv_frame, list);
1885                 prframe = (struct recv_frame *)prhdr;
1886                 pattrib = &prframe->attrib;
1887
1888                 if (!SN_LESS(preorder_ctrl->indicate_seq, pattrib->seq_num)) {
1889                         RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_,
1890                                  ("recv_indicatepkts_in_order: indicate=%d seq=%d amsdu=%d\n",
1891                                   preorder_ctrl->indicate_seq, pattrib->seq_num, pattrib->amsdu));
1892                         plist = plist->next;
1893                         rtw_list_delete(&(prframe->list));
1894
1895                         if (SN_EQUAL(preorder_ctrl->indicate_seq, pattrib->seq_num))
1896                                 preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1) & 0xFFF;
1897
1898                         /* Set this as a lock to make sure that only one thread is indicating packet. */
1899
1900                         /* indicate this recv_frame */
1901                         if (!pattrib->amsdu) {
1902                                 if ((!padapter->bDriverStopped) &&
1903                                     (!padapter->bSurpriseRemoved))
1904                                         rtw_recv_indicatepkt(padapter, prframe);/* indicate this recv_frame */
1905                         } else if (pattrib->amsdu == 1) {
1906                                 if (amsdu_to_msdu(padapter, prframe) != _SUCCESS)
1907                                         rtw_free_recvframe(prframe, &precvpriv->free_recv_queue);
1908                         } else {
1909                                 /* error condition; */
1910                         }
1911
1912                         /* Update local variables. */
1913                         bPktInBuf = false;
1914                 } else {
1915                         bPktInBuf = true;
1916                         break;
1917                 }
1918         }
1919         return bPktInBuf;
1920 }
1921
1922 static int recv_indicatepkt_reorder(struct adapter *padapter,
1923                                     struct recv_frame *prframe)
1924 {
1925         int retval = _SUCCESS;
1926         struct rx_pkt_attrib *pattrib = &prframe->attrib;
1927         struct recv_reorder_ctrl *preorder_ctrl = prframe->preorder_ctrl;
1928         struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
1929
1930         if (!pattrib->amsdu) {
1931                 /* s1. */
1932                 wlanhdr_to_ethhdr(prframe);
1933
1934                 if ((pattrib->qos != 1) || (pattrib->eth_type == 0x0806) ||
1935                     (pattrib->ack_policy != 0)) {
1936                         if ((!padapter->bDriverStopped) &&
1937                             (!padapter->bSurpriseRemoved)) {
1938                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("@@@@  recv_indicatepkt_reorder -recv_func recv_indicatepkt\n"));
1939
1940                                 rtw_recv_indicatepkt(padapter, prframe);
1941                                 return _SUCCESS;
1942                         }
1943
1944                         return _FAIL;
1945                 }
1946
1947                 if (!preorder_ctrl->enable) {
1948                         /* indicate this recv_frame */
1949                         preorder_ctrl->indicate_seq = pattrib->seq_num;
1950                         rtw_recv_indicatepkt(padapter, prframe);
1951
1952                         preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1)%4096;
1953                         return _SUCCESS;
1954                 }
1955         } else if (pattrib->amsdu == 1) { /* temp filter -> means didn't support A-MSDUs in a A-MPDU */
1956                 if (!preorder_ctrl->enable) {
1957                         preorder_ctrl->indicate_seq = pattrib->seq_num;
1958                         retval = amsdu_to_msdu(padapter, prframe);
1959
1960                         preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1)%4096;
1961                         return retval;
1962                 }
1963         }
1964
1965         spin_lock_bh(&ppending_recvframe_queue->lock);
1966
1967         RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_,
1968                  ("recv_indicatepkt_reorder: indicate=%d seq=%d\n",
1969                   preorder_ctrl->indicate_seq, pattrib->seq_num));
1970
1971         /* s2. check if winstart_b(indicate_seq) needs to been updated */
1972         if (!check_indicate_seq(preorder_ctrl, pattrib->seq_num)) {
1973                 rtw_recv_indicatepkt(padapter, prframe);
1974
1975                 spin_unlock_bh(&ppending_recvframe_queue->lock);
1976
1977                 goto _success_exit;
1978         }
1979
1980         /* s3. Insert all packet into Reorder Queue to maintain its ordering. */
1981         if (!enqueue_reorder_recvframe(preorder_ctrl, prframe))
1982                 goto _err_exit;
1983
1984         /* s4. */
1985         /*  Indication process. */
1986         /*  After Packet dropping and Sliding Window shifting as above, we can now just indicate the packets */
1987         /*  with the SeqNum smaller than latest WinStart and buffer other packets. */
1988         /*  */
1989         /*  For Rx Reorder condition: */
1990         /*  1. All packets with SeqNum smaller than WinStart => Indicate */
1991         /*  2. All packets with SeqNum larger than or equal to WinStart => Buffer it. */
1992         /*  */
1993
1994         /* recv_indicatepkts_in_order(padapter, preorder_ctrl, true); */
1995         if (recv_indicatepkts_in_order(padapter, preorder_ctrl, false)) {
1996                 _set_timer(&preorder_ctrl->reordering_ctrl_timer, REORDER_WAIT_TIME);
1997                 spin_unlock_bh(&ppending_recvframe_queue->lock);
1998         } else {
1999                 spin_unlock_bh(&ppending_recvframe_queue->lock);
2000                 del_timer_sync(&preorder_ctrl->reordering_ctrl_timer);
2001         }
2002
2003 _success_exit:
2004
2005         return _SUCCESS;
2006
2007 _err_exit:
2008
2009         spin_unlock_bh(&ppending_recvframe_queue->lock);
2010
2011         return _FAIL;
2012 }
2013
2014 void rtw_reordering_ctrl_timeout_handler(void *pcontext)
2015 {
2016         struct recv_reorder_ctrl *preorder_ctrl = (struct recv_reorder_ctrl *)pcontext;
2017         struct adapter *padapter = preorder_ctrl->padapter;
2018         struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
2019
2020         if (padapter->bDriverStopped || padapter->bSurpriseRemoved)
2021                 return;
2022
2023         spin_lock_bh(&ppending_recvframe_queue->lock);
2024
2025         if (recv_indicatepkts_in_order(padapter, preorder_ctrl, true) == true)
2026                 _set_timer(&preorder_ctrl->reordering_ctrl_timer, REORDER_WAIT_TIME);
2027
2028         spin_unlock_bh(&ppending_recvframe_queue->lock);
2029 }
2030
2031 static int process_recv_indicatepkts(struct adapter *padapter,
2032                                      struct recv_frame *prframe)
2033 {
2034         int retval = _SUCCESS;
2035         struct mlme_priv        *pmlmepriv = &padapter->mlmepriv;
2036         struct ht_priv  *phtpriv = &pmlmepriv->htpriv;
2037
2038         if (phtpriv->ht_option) {  /* B/G/N Mode */
2039                 if (recv_indicatepkt_reorder(padapter, prframe) != _SUCCESS) {
2040                         /*  including perform A-MPDU Rx Ordering Buffer Control */
2041                         if ((!padapter->bDriverStopped) &&
2042                             (!padapter->bSurpriseRemoved)) {
2043                                 retval = _FAIL;
2044                                 return retval;
2045                         }
2046                 }
2047         } else { /* B/G mode */
2048                 retval = wlanhdr_to_ethhdr (prframe);
2049                 if (retval != _SUCCESS) {
2050                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("wlanhdr_to_ethhdr: drop pkt\n"));
2051                         return retval;
2052                 }
2053
2054                 if ((!padapter->bDriverStopped) &&
2055                     (!padapter->bSurpriseRemoved)) {
2056                         /* indicate this recv_frame */
2057                         RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("@@@@ process_recv_indicatepkts- recv_func recv_indicatepkt\n"));
2058                         rtw_recv_indicatepkt(padapter, prframe);
2059                 } else {
2060                         RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("@@@@ process_recv_indicatepkts- recv_func free_indicatepkt\n"));
2061
2062                         RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("recv_func:bDriverStopped(%d) OR bSurpriseRemoved(%d)", padapter->bDriverStopped, padapter->bSurpriseRemoved));
2063                         retval = _FAIL;
2064                         return retval;
2065                 }
2066         }
2067
2068         return retval;
2069 }
2070
2071 static int recv_func_prehandle(struct adapter *padapter,
2072                                struct recv_frame *rframe)
2073 {
2074         int ret = _SUCCESS;
2075         struct rx_pkt_attrib *pattrib = &rframe->attrib;
2076         struct __queue *pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
2077         struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
2078
2079         if (padapter->registrypriv.mp_mode == 1) {
2080                 if ((check_fwstate(pmlmepriv, WIFI_MP_STATE) == true)) { /* padapter->mppriv.check_mp_pkt == 0)) */
2081                         if (pattrib->crc_err == 1)
2082                                 padapter->mppriv.rx_crcerrpktcount++;
2083                         else
2084                                 padapter->mppriv.rx_pktcount++;
2085
2086                         if (check_fwstate(pmlmepriv, WIFI_MP_LPBK_STATE) == false) {
2087                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_alert_, ("MP - Not in loopback mode , drop pkt\n"));
2088                                 ret = _FAIL;
2089                                 rtw_free_recvframe(rframe, pfree_recv_queue);/* free this recv_frame */
2090                                 goto exit;
2091                         }
2092                 }
2093         }
2094
2095         /* check the frame crtl field and decache */
2096         ret = validate_recv_frame(padapter, rframe);
2097         if (ret != _SUCCESS) {
2098                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("recv_func: validate_recv_frame fail! drop pkt\n"));
2099                 rtw_free_recvframe(rframe, pfree_recv_queue);/* free this recv_frame */
2100                 goto exit;
2101         }
2102
2103 exit:
2104         return ret;
2105 }
2106
2107 static int recv_func_posthandle(struct adapter *padapter,
2108                                 struct recv_frame *prframe)
2109 {
2110         int ret = _SUCCESS;
2111         struct recv_frame *orig_prframe = prframe;
2112         struct recv_priv *precvpriv = &padapter->recvpriv;
2113         struct __queue *pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
2114
2115         /*  DATA FRAME */
2116         rtw_led_control(padapter, LED_CTL_RX);
2117
2118         prframe = decryptor(padapter, prframe);
2119         if (prframe == NULL) {
2120                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("decryptor: drop pkt\n"));
2121                 ret = _FAIL;
2122                 goto _recv_data_drop;
2123         }
2124
2125         prframe = recvframe_chk_defrag(padapter, prframe);
2126         if (prframe == NULL) {
2127                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("recvframe_chk_defrag: drop pkt\n"));
2128                 goto _recv_data_drop;
2129         }
2130
2131         prframe = portctrl(padapter, prframe);
2132         if (prframe == NULL) {
2133                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("portctrl: drop pkt\n"));
2134                 ret = _FAIL;
2135                 goto _recv_data_drop;
2136         }
2137
2138         count_rx_stats(padapter, prframe, NULL);
2139
2140         ret = process_recv_indicatepkts(padapter, prframe);
2141         if (ret != _SUCCESS) {
2142                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("recv_func: process_recv_indicatepkts fail!\n"));
2143                 rtw_free_recvframe(orig_prframe, pfree_recv_queue);/* free this recv_frame */
2144                 goto _recv_data_drop;
2145         }
2146         return ret;
2147
2148 _recv_data_drop:
2149         precvpriv->rx_drop++;
2150         return ret;
2151 }
2152
2153 static int recv_func(struct adapter *padapter, struct recv_frame *rframe)
2154 {
2155         int ret;
2156         struct rx_pkt_attrib *prxattrib = &rframe->attrib;
2157         struct security_priv *psecuritypriv = &padapter->securitypriv;
2158         struct mlme_priv *mlmepriv = &padapter->mlmepriv;
2159
2160         /* check if need to handle uc_swdec_pending_queue*/
2161         if (check_fwstate(mlmepriv, WIFI_STATION_STATE) && psecuritypriv->busetkipkey) {
2162                 struct recv_frame *pending_frame;
2163
2164                 while ((pending_frame = rtw_alloc_recvframe(&padapter->recvpriv.uc_swdec_pending_queue))) {
2165                         if (recv_func_posthandle(padapter, pending_frame) == _SUCCESS)
2166                                 DBG_88E("%s: dequeue uc_swdec_pending_queue\n", __func__);
2167                 }
2168         }
2169
2170         ret = recv_func_prehandle(padapter, rframe);
2171
2172         if (ret == _SUCCESS) {
2173                 /* check if need to enqueue into uc_swdec_pending_queue*/
2174                 if (check_fwstate(mlmepriv, WIFI_STATION_STATE) &&
2175                     !IS_MCAST(prxattrib->ra) && prxattrib->encrypt > 0 &&
2176                     (prxattrib->bdecrypted == 0 || psecuritypriv->sw_decrypt) &&
2177                     !is_wep_enc(psecuritypriv->dot11PrivacyAlgrthm) &&
2178                     !psecuritypriv->busetkipkey) {
2179                         rtw_enqueue_recvframe(rframe, &padapter->recvpriv.uc_swdec_pending_queue);
2180                         DBG_88E("%s: no key, enqueue uc_swdec_pending_queue\n", __func__);
2181                         goto exit;
2182                 }
2183
2184                 ret = recv_func_posthandle(padapter, rframe);
2185         }
2186
2187 exit:
2188         return ret;
2189 }
2190
2191 s32 rtw_recv_entry(struct recv_frame *precvframe)
2192 {
2193         struct adapter *padapter;
2194         struct recv_priv *precvpriv;
2195         s32 ret = _SUCCESS;
2196
2197
2198         padapter = precvframe->adapter;
2199
2200         precvpriv = &padapter->recvpriv;
2201
2202         ret = recv_func(padapter, precvframe);
2203         if (ret == _FAIL) {
2204                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("rtw_recv_entry: recv_func return fail!!!\n"));
2205                 goto _recv_entry_drop;
2206         }
2207
2208         precvpriv->rx_pkts++;
2209
2210
2211         return ret;
2212
2213 _recv_entry_drop:
2214
2215         if (padapter->registrypriv.mp_mode == 1)
2216                 padapter->mppriv.rx_pktloss = precvpriv->rx_drop;
2217
2218
2219         return ret;
2220 }
2221
2222 void rtw_signal_stat_timer_hdl(RTW_TIMER_HDL_ARGS)
2223 {
2224         struct adapter *adapter = (struct adapter *)FunctionContext;
2225         struct recv_priv *recvpriv = &adapter->recvpriv;
2226
2227         u32 tmp_s, tmp_q;
2228         u8 avg_signal_strength = 0;
2229         u8 avg_signal_qual = 0;
2230         u8 _alpha = 3; /*  this value is based on converging_constant = 5000 and sampling_interval = 1000 */
2231
2232         if (adapter->recvpriv.is_signal_dbg) {
2233                 /* update the user specific value, signal_strength_dbg, to signal_strength, rssi */
2234                 adapter->recvpriv.signal_strength = adapter->recvpriv.signal_strength_dbg;
2235                 adapter->recvpriv.rssi = (s8)translate_percentage_to_dbm((u8)adapter->recvpriv.signal_strength_dbg);
2236         } else {
2237                 if (recvpriv->signal_strength_data.update_req == 0) {/*  update_req is clear, means we got rx */
2238                         avg_signal_strength = recvpriv->signal_strength_data.avg_val;
2239                         /*  after avg_vals are acquired, we can re-stat the signal values */
2240                         recvpriv->signal_strength_data.update_req = 1;
2241                 }
2242
2243                 if (recvpriv->signal_qual_data.update_req == 0) {/*  update_req is clear, means we got rx */
2244                         avg_signal_qual = recvpriv->signal_qual_data.avg_val;
2245                         /*  after avg_vals are acquired, we can re-stat the signal values */
2246                         recvpriv->signal_qual_data.update_req = 1;
2247                 }
2248
2249                 /* update value of signal_strength, rssi, signal_qual */
2250                 if (check_fwstate(&adapter->mlmepriv, _FW_UNDER_SURVEY) == false) {
2251                         tmp_s = (avg_signal_strength+(_alpha-1)*recvpriv->signal_strength);
2252                         if (tmp_s % _alpha)
2253                                 tmp_s = tmp_s/_alpha + 1;
2254                         else
2255                                 tmp_s = tmp_s/_alpha;
2256                         if (tmp_s > 100)
2257                                 tmp_s = 100;
2258
2259                         tmp_q = (avg_signal_qual+(_alpha-1)*recvpriv->signal_qual);
2260                         if (tmp_q % _alpha)
2261                                 tmp_q = tmp_q/_alpha + 1;
2262                         else
2263                                 tmp_q = tmp_q/_alpha;
2264                         if (tmp_q > 100)
2265                                 tmp_q = 100;
2266
2267                         recvpriv->signal_strength = tmp_s;
2268                         recvpriv->rssi = (s8)translate_percentage_to_dbm(tmp_s);
2269                         recvpriv->signal_qual = tmp_q;
2270                 }
2271         }
2272         rtw_set_signal_stat_timer(recvpriv);
2273 }