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, *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;
 555         u16  eapol_type = 0x888e;/* for Funia BD's WPA issue */
 556         struct rx_pkt_attrib *pattrib;
 557
 558
 559         pstapriv = &adapter->stapriv;
 560
 561         auth_alg = adapter->securitypriv.dot11AuthAlgrthm;
 562
 563         ptr = precv_frame->rx_data;
 564         pfhdr = precv_frame;
 565         pattrib = &pfhdr->attrib;
 566         psta_addr = pattrib->ta;
 567         psta = rtw_get_stainfo(pstapriv, psta_addr);
 568
 569         prtnframe = NULL;
 570
 571         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########portctrl:adapter->securitypriv.dot11AuthAlgrthm=%d\n", adapter->securitypriv.dot11AuthAlgrthm));
 572
 573         if (auth_alg == 2) {
 574                 /* get ether_type */
 575                 ptr = ptr + pfhdr->attrib.hdrlen + LLC_HEADER_SIZE;
 576                 memcpy(&ether_type, ptr, 2);
 577                 ether_type = ntohs((unsigned short)ether_type);
 578
 579                 if ((psta != NULL) && (psta->ieee8021x_blocked)) {
 580                         /* blocked */
 581                         /* only accept EAPOL frame */
 582                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########portctrl:psta->ieee8021x_blocked==1\n"));
 583
 584                         if (ether_type == eapol_type) {
 585                                 prtnframe = precv_frame;
 586                         } else {
 587                                 /* free this frame */
 588                                 rtw_free_recvframe(precv_frame, &adapter->recvpriv.free_recv_queue);
 589                                 prtnframe = NULL;
 590                         }
 591                 } else {
 592                         /* allowed */
 593                         /* check decryption status, and decrypt the frame if needed */
 594                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########portctrl:psta->ieee8021x_blocked==0\n"));
 595                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
 596                                  ("portctrl:precv_frame->hdr.attrib.privacy=%x\n",
 597                                  precv_frame->attrib.privacy));
 598
 599                         if (pattrib->bdecrypted == 0)
 600                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("portctrl:prxstat->decrypted=%x\n", pattrib->bdecrypted));
 601
 602                         prtnframe = precv_frame;
 603                         /* check is the EAPOL frame or not (Rekey) */
 604                         if (ether_type == eapol_type) {
 605                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("########portctrl:ether_type==0x888e\n"));
 606                                 /* check Rekey */
 607
 608                                 prtnframe = precv_frame;
 609                         } else {
 610                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########portctrl:ether_type=0x%04x\n", ether_type));
 611                         }
 612                 }
 613         } else {
 614                 prtnframe = precv_frame;
 615         }
 616
 617
 618                 return prtnframe;
 619 }
 620
 621 static int recv_decache(struct recv_frame *precv_frame, u8 bretry,
 622                         struct stainfo_rxcache *prxcache)
 623 {
 624         int tid = precv_frame->attrib.priority;
 625
 626         u16 seq_ctrl = ((precv_frame->attrib.seq_num&0xffff) << 4) |
 627                 (precv_frame->attrib.frag_num & 0xf);
 628
 629
 630         if (tid > 15) {
 631                 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("recv_decache, (tid>15)! seq_ctrl=0x%x, tid=0x%x\n", seq_ctrl, tid));
 632
 633                 return _FAIL;
 634         }
 635
 636         if (1) {/* if (bretry) */
 637                 if (seq_ctrl == prxcache->tid_rxseq[tid]) {
 638                         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]));
 639
 640                         return _FAIL;
 641                 }
 642         }
 643
 644         prxcache->tid_rxseq[tid] = seq_ctrl;
 645
 646
 647         return _SUCCESS;
 648 }
 649
 650 void process_pwrbit_data(struct adapter *padapter,
 651                          struct recv_frame *precv_frame)
 652 {
 653 #ifdef CONFIG_88EU_AP_MODE
 654         unsigned char pwrbit;
 655         u8 *ptr = precv_frame->rx_data;
 656         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
 657         struct sta_priv *pstapriv = &padapter->stapriv;
 658         struct sta_info *psta = NULL;
 659
 660         psta = rtw_get_stainfo(pstapriv, pattrib->src);
 661
 662         pwrbit = GetPwrMgt(ptr);
 663
 664         if (psta) {
 665                 if (pwrbit) {
 666                         if (!(psta->state & WIFI_SLEEP_STATE))
 667                                 stop_sta_xmit(padapter, psta);
 668                 } else {
 669                         if (psta->state & WIFI_SLEEP_STATE)
 670                                 wakeup_sta_to_xmit(padapter, psta);
 671                 }
 672         }
 673
 674 #endif
 675 }
 676
 677 static void process_wmmps_data(struct adapter *padapter,
 678                                struct recv_frame *precv_frame)
 679 {
 680 #ifdef CONFIG_88EU_AP_MODE
 681         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
 682         struct sta_priv *pstapriv = &padapter->stapriv;
 683         struct sta_info *psta = NULL;
 684
 685         psta = rtw_get_stainfo(pstapriv, pattrib->src);
 686
 687         if (!psta)
 688                 return;
 689
 690         if (!psta->qos_option)
 691                 return;
 692
 693         if (!(psta->qos_info&0xf))
 694                 return;
 695
 696         if (psta->state&WIFI_SLEEP_STATE) {
 697                 u8 wmmps_ac = 0;
 698
 699                 switch (pattrib->priority) {
 700                 case 1:
 701                 case 2:
 702                         wmmps_ac = psta->uapsd_bk&BIT(1);
 703                         break;
 704                 case 4:
 705                 case 5:
 706                         wmmps_ac = psta->uapsd_vi&BIT(1);
 707                         break;
 708                 case 6:
 709                 case 7:
 710                         wmmps_ac = psta->uapsd_vo&BIT(1);
 711                         break;
 712                 case 0:
 713                 case 3:
 714                 default:
 715                         wmmps_ac = psta->uapsd_be&BIT(1);
 716                         break;
 717                 }
 718
 719                 if (wmmps_ac) {
 720                         if (psta->sleepq_ac_len > 0) {
 721                                 /* process received triggered frame */
 722                                 xmit_delivery_enabled_frames(padapter, psta);
 723                         } else {
 724                                 /* issue one qos null frame with More data bit = 0 and the EOSP bit set (= 1) */
 725                                 issue_qos_nulldata(padapter, psta->hwaddr, (u16)pattrib->priority, 0, 0);
 726                         }
 727                 }
 728         }
 729
 730 #endif
 731 }
 732
 733 static void count_rx_stats(struct adapter *padapter,
 734                            struct recv_frame *prframe,
 735                            struct sta_info *sta)
 736 {
 737         int     sz;
 738         struct sta_info         *psta = NULL;
 739         struct stainfo_stats    *pstats = NULL;
 740         struct rx_pkt_attrib    *pattrib = &prframe->attrib;
 741         struct recv_priv        *precvpriv = &padapter->recvpriv;
 742
 743         sz = prframe->len;
 744         precvpriv->rx_bytes += sz;
 745
 746         padapter->mlmepriv.LinkDetectInfo.NumRxOkInPeriod++;
 747
 748         if ((!MacAddr_isBcst(pattrib->dst)) && (!IS_MCAST(pattrib->dst)))
 749                 padapter->mlmepriv.LinkDetectInfo.NumRxUnicastOkInPeriod++;
 750
 751         if (sta)
 752                 psta = sta;
 753         else
 754                 psta = prframe->psta;
 755
 756         if (psta) {
 757                 pstats = &psta->sta_stats;
 758
 759                 pstats->rx_data_pkts++;
 760                 pstats->rx_bytes += sz;
 761         }
 762 }
 763
 764 int sta2sta_data_frame(
 765         struct adapter *adapter,
 766         struct recv_frame *precv_frame,
 767         struct sta_info **psta
 768 );
 769
 770 int sta2sta_data_frame(struct adapter *adapter, struct recv_frame *precv_frame,
 771                        struct sta_info **psta)
 772 {
 773         u8 *ptr = precv_frame->rx_data;
 774         int ret = _SUCCESS;
 775         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
 776         struct  sta_priv *pstapriv = &adapter->stapriv;
 777         struct  mlme_priv *pmlmepriv = &adapter->mlmepriv;
 778         u8 *mybssid  = get_bssid(pmlmepriv);
 779         u8 *myhwaddr = myid(&adapter->eeprompriv);
 780         u8 *sta_addr = NULL;
 781         int bmcast = IS_MCAST(pattrib->dst);
 782
 783
 784         if ((check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) == true) ||
 785             (check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE) == true)) {
 786                 /*  filter packets that SA is myself or multicast or broadcast */
 787                 if (!memcmp(myhwaddr, pattrib->src, ETH_ALEN)) {
 788                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" SA==myself\n"));
 789                         ret = _FAIL;
 790                         goto exit;
 791                 }
 792
 793                 if ((memcmp(myhwaddr, pattrib->dst, ETH_ALEN)) && (!bmcast)) {
 794                         ret = _FAIL;
 795                         goto exit;
 796                 }
 797
 798                 if (!memcmp(pattrib->bssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
 799                     !memcmp(mybssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
 800                     memcmp(pattrib->bssid, mybssid, ETH_ALEN)) {
 801                         ret = _FAIL;
 802                         goto exit;
 803                 }
 804
 805                 sta_addr = pattrib->src;
 806         } else if (check_fwstate(pmlmepriv, WIFI_STATION_STATE)) {
 807                 /*  For Station mode, sa and bssid should always be BSSID, and DA is my mac-address */
 808                 if (memcmp(pattrib->bssid, pattrib->src, ETH_ALEN)) {
 809                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("bssid!=TA under STATION_MODE; drop pkt\n"));
 810                         ret = _FAIL;
 811                         goto exit;
 812                 }
 813                 sta_addr = pattrib->bssid;
 814         } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
 815                 if (bmcast) {
 816                         /*  For AP mode, if DA == MCAST, then BSSID should be also MCAST */
 817                         if (!IS_MCAST(pattrib->bssid)) {
 818                                         ret = _FAIL;
 819                                         goto exit;
 820                         }
 821                 } else { /*  not mc-frame */
 822                         /*  For AP mode, if DA is non-MCAST, then it must be BSSID, and bssid == BSSID */
 823                         if (memcmp(pattrib->bssid, pattrib->dst, ETH_ALEN)) {
 824                                 ret = _FAIL;
 825                                 goto exit;
 826                         }
 827
 828                         sta_addr = pattrib->src;
 829                 }
 830         } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
 831                 memcpy(pattrib->dst, GetAddr1Ptr(ptr), ETH_ALEN);
 832                 memcpy(pattrib->src, GetAddr2Ptr(ptr), ETH_ALEN);
 833                 memcpy(pattrib->bssid, GetAddr3Ptr(ptr), ETH_ALEN);
 834                 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
 835                 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
 836
 837                 sta_addr = mybssid;
 838         } else {
 839                 ret  = _FAIL;
 840         }
 841
 842         if (bmcast)
 843                 *psta = rtw_get_bcmc_stainfo(adapter);
 844         else
 845                 *psta = rtw_get_stainfo(pstapriv, sta_addr); /*  get ap_info */
 846
 847         if (*psta == NULL) {
 848                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("can't get psta under sta2sta_data_frame ; drop pkt\n"));
 849                 if (adapter->registrypriv.mp_mode == 1) {
 850                         if (check_fwstate(pmlmepriv, WIFI_MP_STATE) == true)
 851                         adapter->mppriv.rx_pktloss++;
 852                 }
 853                 ret = _FAIL;
 854                 goto exit;
 855         }
 856
 857 exit:
 858         return ret;
 859 }
 860
 861 static int ap2sta_data_frame (
 862         struct adapter *adapter,
 863         struct recv_frame *precv_frame,
 864         struct sta_info **psta)
 865 {
 866         u8 *ptr = precv_frame->rx_data;
 867         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
 868         int ret = _SUCCESS;
 869         struct  sta_priv *pstapriv = &adapter->stapriv;
 870         struct  mlme_priv *pmlmepriv = &adapter->mlmepriv;
 871         u8 *mybssid  = get_bssid(pmlmepriv);
 872         u8 *myhwaddr = myid(&adapter->eeprompriv);
 873         int bmcast = IS_MCAST(pattrib->dst);
 874
 875
 876         if ((check_fwstate(pmlmepriv, WIFI_STATION_STATE) == true) &&
 877             (check_fwstate(pmlmepriv, _FW_LINKED) == true ||
 878             check_fwstate(pmlmepriv, _FW_UNDER_LINKING))) {
 879                 /*  filter packets that SA is myself or multicast or broadcast */
 880                 if (!memcmp(myhwaddr, pattrib->src, ETH_ALEN)) {
 881                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" SA==myself\n"));
 882                         ret = _FAIL;
 883                         goto exit;
 884                 }
 885
 886                 /*  da should be for me */
 887                 if ((memcmp(myhwaddr, pattrib->dst, ETH_ALEN)) && (!bmcast)) {
 888                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
 889                                  (" ap2sta_data_frame:  compare DA fail; DA=%pM\n", (pattrib->dst)));
 890                         ret = _FAIL;
 891                         goto exit;
 892                 }
 893
 894                 /*  check BSSID */
 895                 if (!memcmp(pattrib->bssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
 896                     !memcmp(mybssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
 897                      (memcmp(pattrib->bssid, mybssid, ETH_ALEN))) {
 898                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
 899                                  (" ap2sta_data_frame:  compare BSSID fail ; BSSID=%pM\n", (pattrib->bssid)));
 900                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("mybssid=%pM\n", (mybssid)));
 901
 902                         if (!bmcast) {
 903                                 DBG_88E("issue_deauth to the nonassociated ap=%pM for the reason(7)\n", (pattrib->bssid));
 904                                 issue_deauth(adapter, pattrib->bssid, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
 905                         }
 906
 907                         ret = _FAIL;
 908                         goto exit;
 909                 }
 910
 911                 if (bmcast)
 912                         *psta = rtw_get_bcmc_stainfo(adapter);
 913                 else
 914                         *psta = rtw_get_stainfo(pstapriv, pattrib->bssid); /*  get ap_info */
 915
 916                 if (*psta == NULL) {
 917                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("ap2sta: can't get psta under STATION_MODE ; drop pkt\n"));
 918                         ret = _FAIL;
 919                         goto exit;
 920                 }
 921
 922                 /* if ((GetFrameSubType(ptr) & WIFI_QOS_DATA_TYPE) == WIFI_QOS_DATA_TYPE) { */
 923                 /*  */
 924
 925                 if (GetFrameSubType(ptr) & BIT(6)) {
 926                         /* No data, will not indicate to upper layer, temporily count it here */
 927                         count_rx_stats(adapter, precv_frame, *psta);
 928                         ret = RTW_RX_HANDLED;
 929                         goto exit;
 930                 }
 931         } else if ((check_fwstate(pmlmepriv, WIFI_MP_STATE) == true) &&
 932                    (check_fwstate(pmlmepriv, _FW_LINKED) == true)) {
 933                 memcpy(pattrib->dst, GetAddr1Ptr(ptr), ETH_ALEN);
 934                 memcpy(pattrib->src, GetAddr2Ptr(ptr), ETH_ALEN);
 935                 memcpy(pattrib->bssid, GetAddr3Ptr(ptr), ETH_ALEN);
 936                 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
 937                 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
 938
 939                 /*  */
 940                 memcpy(pattrib->bssid,  mybssid, ETH_ALEN);
 941
 942                 *psta = rtw_get_stainfo(pstapriv, pattrib->bssid); /*  get sta_info */
 943                 if (*psta == NULL) {
 944                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("can't get psta under MP_MODE ; drop pkt\n"));
 945                         ret = _FAIL;
 946                         goto exit;
 947                 }
 948         } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
 949                 /* Special case */
 950                 ret = RTW_RX_HANDLED;
 951                 goto exit;
 952         } else {
 953                 if (!memcmp(myhwaddr, pattrib->dst, ETH_ALEN) && (!bmcast)) {
 954                         *psta = rtw_get_stainfo(pstapriv, pattrib->bssid); /*  get sta_info */
 955                         if (*psta == NULL) {
 956                                 DBG_88E("issue_deauth to the ap =%pM for the reason(7)\n", (pattrib->bssid));
 957
 958                                 issue_deauth(adapter, pattrib->bssid, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
 959                         }
 960                 }
 961
 962                 ret = _FAIL;
 963         }
 964
 965 exit:
 966
 967
 968         return ret;
 969 }
 970
 971 static int sta2ap_data_frame(struct adapter *adapter,
 972                              struct recv_frame *precv_frame,
 973                              struct sta_info **psta)
 974 {
 975         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
 976         struct  sta_priv *pstapriv = &adapter->stapriv;
 977         struct  mlme_priv *pmlmepriv = &adapter->mlmepriv;
 978         u8 *ptr = precv_frame->rx_data;
 979         unsigned char *mybssid  = get_bssid(pmlmepriv);
 980         int ret = _SUCCESS;
 981
 982
 983         if (check_fwstate(pmlmepriv, WIFI_AP_STATE) == true) {
 984                 /* For AP mode, RA = BSSID, TX = STA(SRC_ADDR), A3 = DST_ADDR */
 985                 if (memcmp(pattrib->bssid, mybssid, ETH_ALEN)) {
 986                         ret = _FAIL;
 987                         goto exit;
 988                 }
 989
 990                 *psta = rtw_get_stainfo(pstapriv, pattrib->src);
 991                 if (*psta == NULL) {
 992                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("can't get psta under AP_MODE; drop pkt\n"));
 993                         DBG_88E("issue_deauth to sta=%pM for the reason(7)\n", (pattrib->src));
 994
 995                         issue_deauth(adapter, pattrib->src, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
 996
 997                         ret = RTW_RX_HANDLED;
 998                         goto exit;
 999                 }
1000
1001                 process_pwrbit_data(adapter, precv_frame);
1002
1003                 if ((GetFrameSubType(ptr) & WIFI_QOS_DATA_TYPE) == WIFI_QOS_DATA_TYPE) {
1004                         process_wmmps_data(adapter, precv_frame);
1005                 }
1006
1007                 if (GetFrameSubType(ptr) & BIT(6)) {
1008                         /* No data, will not indicate to upper layer, temporily count it here */
1009                         count_rx_stats(adapter, precv_frame, *psta);
1010                         ret = RTW_RX_HANDLED;
1011                         goto exit;
1012                 }
1013         } else {
1014                 u8 *myhwaddr = myid(&adapter->eeprompriv);
1015                 if (memcmp(pattrib->ra, myhwaddr, ETH_ALEN)) {
1016                         ret = RTW_RX_HANDLED;
1017                         goto exit;
1018                 }
1019                 DBG_88E("issue_deauth to sta=%pM for the reason(7)\n", (pattrib->src));
1020                 issue_deauth(adapter, pattrib->src, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1021                 ret = RTW_RX_HANDLED;
1022                 goto exit;
1023         }
1024
1025 exit:
1026
1027
1028         return ret;
1029 }
1030
1031 static int validate_recv_ctrl_frame(struct adapter *padapter,
1032                                     struct recv_frame *precv_frame)
1033 {
1034 #ifdef CONFIG_88EU_AP_MODE
1035         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
1036         struct sta_priv *pstapriv = &padapter->stapriv;
1037         u8 *pframe = precv_frame->rx_data;
1038
1039         if (GetFrameType(pframe) != WIFI_CTRL_TYPE)
1040                 return _FAIL;
1041
1042         /* receive the frames that ra(a1) is my address */
1043         if (memcmp(GetAddr1Ptr(pframe), myid(&padapter->eeprompriv), ETH_ALEN))
1044                 return _FAIL;
1045
1046         /* only handle ps-poll */
1047         if (GetFrameSubType(pframe) == WIFI_PSPOLL) {
1048                 u16 aid;
1049                 u8 wmmps_ac = 0;
1050                 struct sta_info *psta = NULL;
1051
1052                 aid = GetAid(pframe);
1053                 psta = rtw_get_stainfo(pstapriv, GetAddr2Ptr(pframe));
1054
1055                 if ((psta == NULL) || (psta->aid != aid))
1056                         return _FAIL;
1057
1058                 /* for rx pkt statistics */
1059                 psta->sta_stats.rx_ctrl_pkts++;
1060
1061                 switch (pattrib->priority) {
1062                 case 1:
1063                 case 2:
1064                         wmmps_ac = psta->uapsd_bk&BIT(0);
1065                         break;
1066                 case 4:
1067                 case 5:
1068                         wmmps_ac = psta->uapsd_vi&BIT(0);
1069                         break;
1070                 case 6:
1071                 case 7:
1072                         wmmps_ac = psta->uapsd_vo&BIT(0);
1073                         break;
1074                 case 0:
1075                 case 3:
1076                 default:
1077                         wmmps_ac = psta->uapsd_be&BIT(0);
1078                         break;
1079                 }
1080
1081                 if (wmmps_ac)
1082                         return _FAIL;
1083
1084                 if (psta->state & WIFI_STA_ALIVE_CHK_STATE) {
1085                         DBG_88E("%s alive check-rx ps-poll\n", __func__);
1086                         psta->expire_to = pstapriv->expire_to;
1087                         psta->state ^= WIFI_STA_ALIVE_CHK_STATE;
1088                 }
1089
1090                 if ((psta->state&WIFI_SLEEP_STATE) && (pstapriv->sta_dz_bitmap&BIT(psta->aid))) {
1091                         struct list_head *xmitframe_plist, *xmitframe_phead;
1092                         struct xmit_frame *pxmitframe = NULL;
1093
1094                         spin_lock_bh(&psta->sleep_q.lock);
1095
1096                         xmitframe_phead = get_list_head(&psta->sleep_q);
1097                         xmitframe_plist = xmitframe_phead->next;
1098
1099                         if ((rtw_end_of_queue_search(xmitframe_phead, xmitframe_plist)) == false) {
1100                                 pxmitframe = container_of(xmitframe_plist, struct xmit_frame, list);
1101
1102                                 xmitframe_plist = xmitframe_plist->next;
1103
1104                                 rtw_list_delete(&pxmitframe->list);
1105
1106                                 psta->sleepq_len--;
1107
1108                                 if (psta->sleepq_len > 0)
1109                                         pxmitframe->attrib.mdata = 1;
1110                                 else
1111                                         pxmitframe->attrib.mdata = 0;
1112
1113                                 pxmitframe->attrib.triggered = 1;
1114
1115                                 spin_unlock_bh(&psta->sleep_q.lock);
1116                                 if (rtw_hal_xmit(padapter, pxmitframe) == true)
1117                                         rtw_os_xmit_complete(padapter, pxmitframe);
1118                                 spin_lock_bh(&psta->sleep_q.lock);
1119
1120                                 if (psta->sleepq_len == 0) {
1121                                         pstapriv->tim_bitmap &= ~BIT(psta->aid);
1122
1123                                         /* update BCN for TIM IE */
1124                                         /* update_BCNTIM(padapter); */
1125                                         update_beacon(padapter, _TIM_IE_, NULL, false);
1126                                 }
1127                         } else {
1128                                 if (pstapriv->tim_bitmap&BIT(psta->aid)) {
1129                                         if (psta->sleepq_len == 0) {
1130                                                 DBG_88E("no buffered packets to xmit\n");
1131
1132                                                 /* issue nulldata with More data bit = 0 to indicate we have no buffered packets */
1133                                                 issue_nulldata(padapter, psta->hwaddr, 0, 0, 0);
1134                                         } else {
1135                                                 DBG_88E("error!psta->sleepq_len=%d\n", psta->sleepq_len);
1136                                                 psta->sleepq_len = 0;
1137                                         }
1138
1139                                         pstapriv->tim_bitmap &= ~BIT(psta->aid);
1140
1141                                         /* update BCN for TIM IE */
1142                                         /* update_BCNTIM(padapter); */
1143                                         update_beacon(padapter, _TIM_IE_, NULL, false);
1144                                 }
1145                         }
1146
1147                         spin_unlock_bh(&psta->sleep_q.lock);
1148                 }
1149         }
1150
1151 #endif
1152
1153         return _FAIL;
1154 }
1155
1156 struct recv_frame *recvframe_chk_defrag(struct adapter *padapter,
1157                                         struct recv_frame *precv_frame);
1158
1159 static int validate_recv_mgnt_frame(struct adapter *padapter,
1160                                     struct recv_frame *precv_frame)
1161 {
1162         struct sta_info *psta;
1163
1164         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("+validate_recv_mgnt_frame\n"));
1165
1166         precv_frame = recvframe_chk_defrag(padapter, precv_frame);
1167         if (precv_frame == NULL) {
1168                 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("%s: fragment packet\n", __func__));
1169                 return _SUCCESS;
1170         }
1171
1172         /* for rx pkt statistics */
1173         psta = rtw_get_stainfo(&padapter->stapriv,
1174                                GetAddr2Ptr(precv_frame->rx_data));
1175         if (psta) {
1176                 psta->sta_stats.rx_mgnt_pkts++;
1177                 if (GetFrameSubType(precv_frame->rx_data) == WIFI_BEACON) {
1178                         psta->sta_stats.rx_beacon_pkts++;
1179                 } else if (GetFrameSubType(precv_frame->rx_data) == WIFI_PROBEREQ) {
1180                         psta->sta_stats.rx_probereq_pkts++;
1181                 } else if (GetFrameSubType(precv_frame->rx_data) == WIFI_PROBERSP) {
1182                         if (!memcmp(padapter->eeprompriv.mac_addr,
1183                                     GetAddr1Ptr(precv_frame->rx_data), ETH_ALEN))
1184                                 psta->sta_stats.rx_probersp_pkts++;
1185                         else if (is_broadcast_mac_addr(GetAddr1Ptr(precv_frame->rx_data)) ||
1186                                  is_multicast_mac_addr(GetAddr1Ptr(precv_frame->rx_data)))
1187                                 psta->sta_stats.rx_probersp_bm_pkts++;
1188                         else
1189                                 psta->sta_stats.rx_probersp_uo_pkts++;
1190                 }
1191         }
1192
1193         mgt_dispatcher(padapter, precv_frame);
1194
1195         return _SUCCESS;
1196 }
1197
1198 static int validate_recv_data_frame(struct adapter *adapter,
1199                                     struct recv_frame *precv_frame)
1200 {
1201         u8 bretry;
1202         u8 *psa, *pda, *pbssid;
1203         struct sta_info *psta = NULL;
1204         u8 *ptr = precv_frame->rx_data;
1205         struct rx_pkt_attrib    *pattrib = &precv_frame->attrib;
1206         struct security_priv    *psecuritypriv = &adapter->securitypriv;
1207         int ret = _SUCCESS;
1208
1209
1210         bretry = GetRetry(ptr);
1211         pda = get_da(ptr);
1212         psa = get_sa(ptr);
1213         pbssid = get_hdr_bssid(ptr);
1214
1215         if (pbssid == NULL) {
1216                 ret = _FAIL;
1217                 goto exit;
1218         }
1219
1220         memcpy(pattrib->dst, pda, ETH_ALEN);
1221         memcpy(pattrib->src, psa, ETH_ALEN);
1222
1223         memcpy(pattrib->bssid, pbssid, ETH_ALEN);
1224
1225         switch (pattrib->to_fr_ds) {
1226         case 0:
1227                 memcpy(pattrib->ra, pda, ETH_ALEN);
1228                 memcpy(pattrib->ta, psa, ETH_ALEN);
1229                 ret = sta2sta_data_frame(adapter, precv_frame, &psta);
1230                 break;
1231         case 1:
1232                 memcpy(pattrib->ra, pda, ETH_ALEN);
1233                 memcpy(pattrib->ta, pbssid, ETH_ALEN);
1234                 ret = ap2sta_data_frame(adapter, precv_frame, &psta);
1235                 break;
1236         case 2:
1237                 memcpy(pattrib->ra, pbssid, ETH_ALEN);
1238                 memcpy(pattrib->ta, psa, ETH_ALEN);
1239                 ret = sta2ap_data_frame(adapter, precv_frame, &psta);
1240                 break;
1241         case 3:
1242                 memcpy(pattrib->ra, GetAddr1Ptr(ptr), ETH_ALEN);
1243                 memcpy(pattrib->ta, GetAddr2Ptr(ptr), ETH_ALEN);
1244                 ret = _FAIL;
1245                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" case 3\n"));
1246                 break;
1247         default:
1248                 ret = _FAIL;
1249                 break;
1250         }
1251
1252         if (ret == _FAIL) {
1253                 goto exit;
1254         } else if (ret == RTW_RX_HANDLED) {
1255                 goto exit;
1256         }
1257
1258         if (psta == NULL) {
1259                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" after to_fr_ds_chk; psta==NULL\n"));
1260                 ret = _FAIL;
1261                 goto exit;
1262         }
1263
1264         /* psta->rssi = prxcmd->rssi; */
1265         /* psta->signal_quality = prxcmd->sq; */
1266         precv_frame->psta = psta;
1267
1268         pattrib->amsdu = 0;
1269         pattrib->ack_policy = 0;
1270         /* parsing QC field */
1271         if (pattrib->qos == 1) {
1272                 pattrib->priority = GetPriority((ptr + 24));
1273                 pattrib->ack_policy = GetAckpolicy((ptr + 24));
1274                 pattrib->amsdu = GetAMsdu((ptr + 24));
1275                 pattrib->hdrlen = pattrib->to_fr_ds == 3 ? 32 : 26;
1276
1277                 if (pattrib->priority != 0 && pattrib->priority != 3)
1278                         adapter->recvpriv.bIsAnyNonBEPkts = true;
1279         } else {
1280                 pattrib->priority = 0;
1281                 pattrib->hdrlen = pattrib->to_fr_ds == 3 ? 30 : 24;
1282         }
1283
1284         if (pattrib->order)/* HT-CTRL 11n */
1285                 pattrib->hdrlen += 4;
1286
1287         precv_frame->preorder_ctrl = &psta->recvreorder_ctrl[pattrib->priority];
1288
1289         /*  decache, drop duplicate recv packets */
1290         if (recv_decache(precv_frame, bretry, &psta->sta_recvpriv.rxcache) == _FAIL) {
1291                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("decache : drop pkt\n"));
1292                 ret = _FAIL;
1293                 goto exit;
1294         }
1295
1296         if (pattrib->privacy) {
1297                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("validate_recv_data_frame:pattrib->privacy=%x\n", pattrib->privacy));
1298                 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)));
1299
1300                 GET_ENCRY_ALGO(psecuritypriv, psta, pattrib->encrypt, IS_MCAST(pattrib->ra));
1301
1302                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n pattrib->encrypt=%d\n", pattrib->encrypt));
1303
1304                 SET_ICE_IV_LEN(pattrib->iv_len, pattrib->icv_len, pattrib->encrypt);
1305         } else {
1306                 pattrib->encrypt = 0;
1307                 pattrib->iv_len = 0;
1308                 pattrib->icv_len = 0;
1309         }
1310
1311 exit:
1312
1313
1314         return ret;
1315 }
1316
1317 static int validate_recv_frame(struct adapter *adapter,
1318                                struct recv_frame *precv_frame)
1319 {
1320         /* shall check frame subtype, to / from ds, da, bssid */
1321
1322         /* then call check if rx seq/frag. duplicated. */
1323
1324         u8 type;
1325         u8 subtype;
1326         int retval = _SUCCESS;
1327         u8 bDumpRxPkt;
1328         struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
1329         u8 *ptr = precv_frame->rx_data;
1330         u8  ver = (unsigned char) (*ptr)&0x3;
1331         struct mlme_ext_priv *pmlmeext = &adapter->mlmeextpriv;
1332
1333
1334         if (pmlmeext->sitesurvey_res.state == SCAN_PROCESS) {
1335                 int ch_set_idx = rtw_ch_set_search_ch(pmlmeext->channel_set, rtw_get_oper_ch(adapter));
1336                 if (ch_set_idx >= 0)
1337                         pmlmeext->channel_set[ch_set_idx].rx_count++;
1338         }
1339
1340         /* add version chk */
1341         if (ver != 0) {
1342                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("validate_recv_data_frame fail! (ver!=0)\n"));
1343                 retval = _FAIL;
1344                 goto exit;
1345         }
1346
1347         type =  GetFrameType(ptr);
1348         subtype = GetFrameSubType(ptr); /* bit(7)~bit(2) */
1349
1350         pattrib->to_fr_ds = get_tofr_ds(ptr);
1351
1352         pattrib->frag_num = GetFragNum(ptr);
1353         pattrib->seq_num = GetSequence(ptr);
1354
1355         pattrib->pw_save = GetPwrMgt(ptr);
1356         pattrib->mfrag = GetMFrag(ptr);
1357         pattrib->mdata = GetMData(ptr);
1358         pattrib->privacy = GetPrivacy(ptr);
1359         pattrib->order = GetOrder(ptr);
1360
1361         /* Dump rx packets */
1362         rtw_hal_get_def_var(adapter, HAL_DEF_DBG_DUMP_RXPKT, &(bDumpRxPkt));
1363         if (bDumpRxPkt == 1) {/* dump all rx packets */
1364                 int i;
1365                 DBG_88E("#############################\n");
1366
1367                 for (i = 0; i < 64; i = i+8)
1368                         DBG_88E("%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:\n", *(ptr+i),
1369                                 *(ptr+i+1), *(ptr+i+2), *(ptr+i+3), *(ptr+i+4), *(ptr+i+5), *(ptr+i+6), *(ptr+i+7));
1370                 DBG_88E("#############################\n");
1371         } else if (bDumpRxPkt == 2) {
1372                 if (type == WIFI_MGT_TYPE) {
1373                         int i;
1374                         DBG_88E("#############################\n");
1375
1376                         for (i = 0; i < 64; i = i+8)
1377                                 DBG_88E("%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:\n", *(ptr+i),
1378                                         *(ptr+i+1), *(ptr+i+2), *(ptr+i+3), *(ptr+i+4), *(ptr+i+5), *(ptr+i+6), *(ptr+i+7));
1379                         DBG_88E("#############################\n");
1380                 }
1381         } else if (bDumpRxPkt == 3) {
1382                 if (type == WIFI_DATA_TYPE) {
1383                         int i;
1384                         DBG_88E("#############################\n");
1385
1386                         for (i = 0; i < 64; i = i+8)
1387                                 DBG_88E("%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:\n", *(ptr+i),
1388                                         *(ptr+i+1), *(ptr+i+2), *(ptr+i+3), *(ptr+i+4), *(ptr+i+5), *(ptr+i+6), *(ptr+i+7));
1389                         DBG_88E("#############################\n");
1390                 }
1391         }
1392         switch (type) {
1393         case WIFI_MGT_TYPE: /* mgnt */
1394                 retval = validate_recv_mgnt_frame(adapter, precv_frame);
1395                 if (retval == _FAIL)
1396                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("validate_recv_mgnt_frame fail\n"));
1397                 retval = _FAIL; /*  only data frame return _SUCCESS */
1398                 break;
1399         case WIFI_CTRL_TYPE: /* ctrl */
1400                 retval = validate_recv_ctrl_frame(adapter, precv_frame);
1401                 if (retval == _FAIL)
1402                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("validate_recv_ctrl_frame fail\n"));
1403                 retval = _FAIL; /*  only data frame return _SUCCESS */
1404                 break;
1405         case WIFI_DATA_TYPE: /* data */
1406                 rtw_led_control(adapter, LED_CTL_RX);
1407                 pattrib->qos = (subtype & BIT(7)) ? 1 : 0;
1408                 retval = validate_recv_data_frame(adapter, precv_frame);
1409                 if (retval == _FAIL) {
1410                         struct recv_priv *precvpriv = &adapter->recvpriv;
1411                         precvpriv->rx_drop++;
1412                 }
1413                 break;
1414         default:
1415                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("validate_recv_data_frame fail! type= 0x%x\n", type));
1416                 retval = _FAIL;
1417                 break;
1418         }
1419
1420 exit:
1421
1422
1423         return retval;
1424 }
1425
1426 /* remove the wlanhdr and add the eth_hdr */
1427
1428 static int wlanhdr_to_ethhdr(struct recv_frame *precvframe)
1429 {
1430         int     rmv_len;
1431         u16     eth_type, len;
1432         __be16 be_tmp;
1433         u8      bsnaphdr;
1434         u8      *psnap_type;
1435         struct ieee80211_snap_hdr       *psnap;
1436
1437         int ret = _SUCCESS;
1438         struct adapter          *adapter = precvframe->adapter;
1439         struct mlme_priv        *pmlmepriv = &adapter->mlmepriv;
1440         u8 *ptr = precvframe->rx_data;
1441         struct rx_pkt_attrib *pattrib = &precvframe->attrib;
1442
1443         if (pattrib->encrypt)
1444                 recvframe_pull_tail(precvframe, pattrib->icv_len);
1445
1446         psnap = (struct ieee80211_snap_hdr *)(ptr+pattrib->hdrlen + pattrib->iv_len);
1447         psnap_type = ptr+pattrib->hdrlen + pattrib->iv_len+SNAP_SIZE;
1448         /* convert hdr + possible LLC headers into Ethernet header */
1449         if ((!memcmp(psnap, rtw_rfc1042_header, SNAP_SIZE) &&
1450              (!memcmp(psnap_type, SNAP_ETH_TYPE_IPX, 2) == false) &&
1451              (!memcmp(psnap_type, SNAP_ETH_TYPE_APPLETALK_AARP, 2) == false)) ||
1452              !memcmp(psnap, rtw_bridge_tunnel_header, SNAP_SIZE)) {
1453                 /* remove RFC1042 or Bridge-Tunnel encapsulation and replace EtherType */
1454                 bsnaphdr = true;
1455         } else {
1456                 /* Leave Ethernet header part of hdr and full payload */
1457                 bsnaphdr = false;
1458         }
1459
1460         rmv_len = pattrib->hdrlen + pattrib->iv_len + (bsnaphdr ? SNAP_SIZE : 0);
1461         len = precvframe->len - rmv_len;
1462
1463         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
1464                  ("\n===pattrib->hdrlen: %x,  pattrib->iv_len:%x===\n\n", pattrib->hdrlen,  pattrib->iv_len));
1465
1466         memcpy(&be_tmp, ptr+rmv_len, 2);
1467         eth_type = ntohs(be_tmp); /* pattrib->ether_type */
1468         pattrib->eth_type = eth_type;
1469
1470         if ((check_fwstate(pmlmepriv, WIFI_MP_STATE))) {
1471                 ptr += rmv_len;
1472                 *ptr = 0x87;
1473                 *(ptr+1) = 0x12;
1474
1475                 eth_type = 0x8712;
1476                 /*  append rx status for mp test packets */
1477                 ptr = recvframe_pull(precvframe, (rmv_len-sizeof(struct ethhdr)+2)-24);
1478                 memcpy(ptr, get_rxmem(precvframe), 24);
1479                 ptr += 24;
1480         } else {
1481                 ptr = recvframe_pull(precvframe, (rmv_len-sizeof(struct ethhdr) + (bsnaphdr ? 2 : 0)));
1482         }
1483
1484         memcpy(ptr, pattrib->dst, ETH_ALEN);
1485         memcpy(ptr+ETH_ALEN, pattrib->src, ETH_ALEN);
1486
1487         if (!bsnaphdr) {
1488                 be_tmp = htons(len);
1489                 memcpy(ptr+12, &be_tmp, 2);
1490         }
1491
1492         return ret;
1493 }
1494
1495 /* perform defrag */
1496 static struct recv_frame *recvframe_defrag(struct adapter *adapter,
1497                                            struct __queue *defrag_q)
1498 {
1499         struct list_head *plist, *phead;
1500         u8 wlanhdr_offset;
1501         u8      curfragnum;
1502         struct recv_frame *pfhdr, *pnfhdr;
1503         struct recv_frame *prframe, *pnextrframe;
1504         struct __queue *pfree_recv_queue;
1505
1506
1507         curfragnum = 0;
1508         pfree_recv_queue = &adapter->recvpriv.free_recv_queue;
1509
1510         phead = get_list_head(defrag_q);
1511         plist = phead->next;
1512         pfhdr = container_of(plist, struct recv_frame, list);
1513         prframe = (struct recv_frame *)pfhdr;
1514         rtw_list_delete(&(prframe->list));
1515
1516         if (curfragnum != pfhdr->attrib.frag_num) {
1517                 /* the first fragment number must be 0 */
1518                 /* free the whole queue */
1519                 rtw_free_recvframe(prframe, pfree_recv_queue);
1520                 rtw_free_recvframe_queue(defrag_q, pfree_recv_queue);
1521
1522                 return NULL;
1523         }
1524
1525         curfragnum++;
1526
1527         plist = get_list_head(defrag_q);
1528
1529         plist = plist->next;
1530
1531         while (rtw_end_of_queue_search(phead, plist) == false) {
1532                 pnfhdr = container_of(plist, struct recv_frame, list);
1533                 pnextrframe = (struct recv_frame *)pnfhdr;
1534
1535                 /* check the fragment sequence  (2nd ~n fragment frame) */
1536
1537                 if (curfragnum != pnfhdr->attrib.frag_num) {
1538                         /* the fragment number must be increasing  (after decache) */
1539                         /* release the defrag_q & prframe */
1540                         rtw_free_recvframe(prframe, pfree_recv_queue);
1541                         rtw_free_recvframe_queue(defrag_q, pfree_recv_queue);
1542                         return NULL;
1543                 }
1544
1545                 curfragnum++;
1546
1547                 /* copy the 2nd~n fragment frame's payload to the first fragment */
1548                 /* get the 2nd~last fragment frame's payload */
1549
1550                 wlanhdr_offset = pnfhdr->attrib.hdrlen + pnfhdr->attrib.iv_len;
1551
1552                 recvframe_pull(pnextrframe, wlanhdr_offset);
1553
1554                 /* append  to first fragment frame's tail (if privacy frame, pull the ICV) */
1555                 recvframe_pull_tail(prframe, pfhdr->attrib.icv_len);
1556
1557                 /* memcpy */
1558                 memcpy(pfhdr->rx_tail, pnfhdr->rx_data, pnfhdr->len);
1559
1560                 recvframe_put(prframe, pnfhdr->len);
1561
1562                 pfhdr->attrib.icv_len = pnfhdr->attrib.icv_len;
1563                 plist = plist->next;
1564         }
1565
1566         /* free the defrag_q queue and return the prframe */
1567         rtw_free_recvframe_queue(defrag_q, pfree_recv_queue);
1568
1569         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("Performance defrag!!!!!\n"));
1570
1571
1572         return prframe;
1573 }
1574
1575 /* check if need to defrag, if needed queue the frame to defrag_q */
1576 struct recv_frame *recvframe_chk_defrag(struct adapter *padapter,
1577                                         struct recv_frame *precv_frame)
1578 {
1579         u8      ismfrag;
1580         u8      fragnum;
1581         u8      *psta_addr;
1582         struct recv_frame *pfhdr;
1583         struct sta_info *psta;
1584         struct sta_priv *pstapriv;
1585         struct list_head *phead;
1586         struct recv_frame *prtnframe = NULL;
1587         struct __queue *pfree_recv_queue, *pdefrag_q;
1588
1589
1590         pstapriv = &padapter->stapriv;
1591
1592         pfhdr = precv_frame;
1593
1594         pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
1595
1596         /* need to define struct of wlan header frame ctrl */
1597         ismfrag = pfhdr->attrib.mfrag;
1598         fragnum = pfhdr->attrib.frag_num;
1599
1600         psta_addr = pfhdr->attrib.ta;
1601         psta = rtw_get_stainfo(pstapriv, psta_addr);
1602         if (psta == NULL) {
1603                 u8 type = GetFrameType(pfhdr->rx_data);
1604                 if (type != WIFI_DATA_TYPE) {
1605                         psta = rtw_get_bcmc_stainfo(padapter);
1606                         pdefrag_q = &psta->sta_recvpriv.defrag_q;
1607                 } else {
1608                         pdefrag_q = NULL;
1609                 }
1610         } else {
1611                 pdefrag_q = &psta->sta_recvpriv.defrag_q;
1612         }
1613
1614         if ((ismfrag == 0) && (fragnum == 0))
1615                 prtnframe = precv_frame;/* isn't a fragment frame */
1616
1617         if (ismfrag == 1) {
1618                 /* 0~(n-1) fragment frame */
1619                 /* enqueue to defraf_g */
1620                 if (pdefrag_q != NULL) {
1621                         if (fragnum == 0) {
1622                                 /* the first fragment */
1623                                 if (_rtw_queue_empty(pdefrag_q) == false) {
1624                                         /* free current defrag_q */
1625                                         rtw_free_recvframe_queue(pdefrag_q, pfree_recv_queue);
1626                                 }
1627                         }
1628
1629                         /* Then enqueue the 0~(n-1) fragment into the defrag_q */
1630
1631                         phead = get_list_head(pdefrag_q);
1632                         rtw_list_insert_tail(&pfhdr->list, phead);
1633
1634                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("Enqueuq: ismfrag=%d, fragnum=%d\n", ismfrag, fragnum));
1635
1636                         prtnframe = NULL;
1637                 } else {
1638                         /* can't find this ta's defrag_queue, so free this recv_frame */
1639                         rtw_free_recvframe(precv_frame, pfree_recv_queue);
1640                         prtnframe = NULL;
1641                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("Free because pdefrag_q==NULL: ismfrag=%d, fragnum=%d\n", ismfrag, fragnum));
1642                 }
1643         }
1644
1645         if ((ismfrag == 0) && (fragnum != 0)) {
1646                 /* the last fragment frame */
1647                 /* enqueue the last fragment */
1648                 if (pdefrag_q != NULL) {
1649                         phead = get_list_head(pdefrag_q);
1650                         rtw_list_insert_tail(&pfhdr->list, phead);
1651
1652                         /* call recvframe_defrag to defrag */
1653                         RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("defrag: ismfrag=%d, fragnum=%d\n", ismfrag, fragnum));
1654                         precv_frame = recvframe_defrag(padapter, pdefrag_q);
1655                         prtnframe = precv_frame;
1656                 } else {
1657                         /* can't find this ta's defrag_queue, so free this recv_frame */
1658                         rtw_free_recvframe(precv_frame, pfree_recv_queue);
1659                         prtnframe = NULL;
1660                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("Free because pdefrag_q==NULL: ismfrag=%d, fragnum=%d\n", ismfrag, fragnum));
1661                 }
1662         }
1663
1664         if ((prtnframe != NULL) && (prtnframe->attrib.privacy)) {
1665                 /* after defrag we must check tkip mic code */
1666                 if (recvframe_chkmic(padapter,  prtnframe) == _FAIL) {
1667                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("recvframe_chkmic(padapter,  prtnframe)==_FAIL\n"));
1668                         rtw_free_recvframe(prtnframe, pfree_recv_queue);
1669                         prtnframe = NULL;
1670                 }
1671         }
1672
1673
1674         return prtnframe;
1675 }
1676
1677 static int amsdu_to_msdu(struct adapter *padapter, struct recv_frame *prframe)
1678 {
1679         int     a_len, padding_len;
1680         u16     eth_type, nSubframe_Length;
1681         u8      nr_subframes, i;
1682         unsigned char *pdata;
1683         struct rx_pkt_attrib *pattrib;
1684         unsigned char *data_ptr;
1685         struct sk_buff *sub_skb, *subframes[MAX_SUBFRAME_COUNT];
1686         struct recv_priv *precvpriv = &padapter->recvpriv;
1687         struct __queue *pfree_recv_queue = &(precvpriv->free_recv_queue);
1688         int     ret = _SUCCESS;
1689         nr_subframes = 0;
1690
1691         pattrib = &prframe->attrib;
1692
1693         recvframe_pull(prframe, prframe->attrib.hdrlen);
1694
1695         if (prframe->attrib.iv_len > 0)
1696                 recvframe_pull(prframe, prframe->attrib.iv_len);
1697
1698         a_len = prframe->len;
1699
1700         pdata = prframe->rx_data;
1701
1702         while (a_len > ETH_HLEN) {
1703                 /* Offset 12 denote 2 mac address */
1704                 nSubframe_Length = RTW_GET_BE16(pdata + 12);
1705
1706                 if (a_len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) {
1707                         DBG_88E("nRemain_Length is %d and nSubframe_Length is : %d\n", a_len, nSubframe_Length);
1708                         goto exit;
1709                 }
1710
1711                 /* move the data point to data content */
1712                 pdata += ETH_HLEN;
1713                 a_len -= ETH_HLEN;
1714
1715                 /* Allocate new skb for releasing to upper layer */
1716                 sub_skb = dev_alloc_skb(nSubframe_Length + 12);
1717                 if (sub_skb) {
1718                         skb_reserve(sub_skb, 12);
1719                         data_ptr = (u8 *)skb_put(sub_skb, nSubframe_Length);
1720                         memcpy(data_ptr, pdata, nSubframe_Length);
1721                 } else {
1722                         sub_skb = skb_clone(prframe->pkt, GFP_ATOMIC);
1723                         if (sub_skb) {
1724                                 sub_skb->data = pdata;
1725                                 sub_skb->len = nSubframe_Length;
1726                                 skb_set_tail_pointer(sub_skb, nSubframe_Length);
1727                         } else {
1728                                 DBG_88E("skb_clone() Fail!!! , nr_subframes=%d\n", nr_subframes);
1729                                 break;
1730                         }
1731                 }
1732
1733                 subframes[nr_subframes++] = sub_skb;
1734
1735                 if (nr_subframes >= MAX_SUBFRAME_COUNT) {
1736                         DBG_88E("ParseSubframe(): Too many Subframes! Packets dropped!\n");
1737                         break;
1738                 }
1739
1740                 pdata += nSubframe_Length;
1741                 a_len -= nSubframe_Length;
1742                 if (a_len != 0) {
1743                         padding_len = 4 - ((nSubframe_Length + ETH_HLEN) & (4-1));
1744                         if (padding_len == 4) {
1745                                 padding_len = 0;
1746                         }
1747
1748                         if (a_len < padding_len) {
1749                                 goto exit;
1750                         }
1751                         pdata += padding_len;
1752                         a_len -= padding_len;
1753                 }
1754         }
1755
1756         for (i = 0; i < nr_subframes; i++) {
1757                 sub_skb = subframes[i];
1758                 /* convert hdr + possible LLC headers into Ethernet header */
1759                 eth_type = RTW_GET_BE16(&sub_skb->data[6]);
1760                 if (sub_skb->len >= 8 &&
1761                     ((!memcmp(sub_skb->data, rtw_rfc1042_header, SNAP_SIZE) &&
1762                           eth_type != ETH_P_AARP && eth_type != ETH_P_IPX) ||
1763                          !memcmp(sub_skb->data, rtw_bridge_tunnel_header, SNAP_SIZE))) {
1764                         /* remove RFC1042 or Bridge-Tunnel encapsulation and replace EtherType */
1765                         skb_pull(sub_skb, SNAP_SIZE);
1766                         memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src, ETH_ALEN);
1767                         memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst, ETH_ALEN);
1768                 } else {
1769                         __be16 len;
1770                         /* Leave Ethernet header part of hdr and full payload */
1771                         len = htons(sub_skb->len);
1772                         memcpy(skb_push(sub_skb, 2), &len, 2);
1773                         memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src, ETH_ALEN);
1774                         memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst, ETH_ALEN);
1775                 }
1776
1777                 /* Indicate the packets to upper layer */
1778                 /*  Insert NAT2.5 RX here! */
1779                 sub_skb->protocol = eth_type_trans(sub_skb, padapter->pnetdev);
1780                 sub_skb->dev = padapter->pnetdev;
1781
1782                 sub_skb->ip_summed = CHECKSUM_NONE;
1783
1784                 netif_rx(sub_skb);
1785         }
1786
1787 exit:
1788
1789         prframe->len = 0;
1790         rtw_free_recvframe(prframe, pfree_recv_queue);/* free this recv_frame */
1791
1792         return ret;
1793 }
1794
1795 static int check_indicate_seq(struct recv_reorder_ctrl *preorder_ctrl, u16 seq_num)
1796 {
1797         u8      wsize = preorder_ctrl->wsize_b;
1798         u16     wend = (preorder_ctrl->indicate_seq + wsize - 1) & 0xFFF;/*  4096; */
1799
1800         /*  Rx Reorder initialize condition. */
1801         if (preorder_ctrl->indicate_seq == 0xFFFF)
1802                 preorder_ctrl->indicate_seq = seq_num;
1803
1804         /*  Drop out the packet which SeqNum is smaller than WinStart */
1805         if (SN_LESS(seq_num, preorder_ctrl->indicate_seq))
1806                 return false;
1807
1808         /*  */
1809         /*  Sliding window manipulation. Conditions includes: */
1810         /*  1. Incoming SeqNum is equal to WinStart =>Window shift 1 */
1811         /*  2. Incoming SeqNum is larger than the WinEnd => Window shift N */
1812         /*  */
1813         if (SN_EQUAL(seq_num, preorder_ctrl->indicate_seq)) {
1814                 preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1) & 0xFFF;
1815         } else if (SN_LESS(wend, seq_num)) {
1816                 if (seq_num >= (wsize - 1))
1817                         preorder_ctrl->indicate_seq = seq_num + 1 - wsize;
1818                 else
1819                         preorder_ctrl->indicate_seq = 0xFFF - (wsize - (seq_num + 1)) + 1;
1820         }
1821
1822         return true;
1823 }
1824
1825 int enqueue_reorder_recvframe(struct recv_reorder_ctrl *preorder_ctrl,
1826                               struct recv_frame *prframe)
1827 {
1828         struct rx_pkt_attrib *pattrib = &prframe->attrib;
1829         struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
1830         struct list_head *phead, *plist;
1831         struct recv_frame *hdr;
1832         struct rx_pkt_attrib *pnextattrib;
1833
1834         phead = get_list_head(ppending_recvframe_queue);
1835         plist = phead->next;
1836
1837         while (rtw_end_of_queue_search(phead, plist) == false) {
1838                 hdr = container_of(plist, struct recv_frame, list);
1839                 pnextattrib = &hdr->attrib;
1840
1841                 if (SN_LESS(pnextattrib->seq_num, pattrib->seq_num))
1842                         plist = plist->next;
1843                 else if (SN_EQUAL(pnextattrib->seq_num, pattrib->seq_num))
1844                         return false;
1845                 else
1846                         break;
1847         }
1848
1849         rtw_list_delete(&(prframe->list));
1850
1851         rtw_list_insert_tail(&(prframe->list), plist);
1852         return true;
1853 }
1854
1855 static int recv_indicatepkts_in_order(struct adapter *padapter, struct recv_reorder_ctrl *preorder_ctrl, int bforced)
1856 {
1857         struct list_head *phead, *plist;
1858         struct recv_frame *prframe;
1859         struct recv_frame *prhdr;
1860         struct rx_pkt_attrib *pattrib;
1861         int bPktInBuf = false;
1862         struct recv_priv *precvpriv = &padapter->recvpriv;
1863         struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
1864
1865         phead =         get_list_head(ppending_recvframe_queue);
1866         plist = phead->next;
1867
1868         /*  Handling some condition for forced indicate case. */
1869         if (bforced) {
1870                 if (rtw_is_list_empty(phead))
1871                         return true;
1872
1873                 prhdr = container_of(plist, struct recv_frame, list);
1874                 pattrib = &prhdr->attrib;
1875                 preorder_ctrl->indicate_seq = pattrib->seq_num;
1876         }
1877
1878         /*  Prepare indication list and indication. */
1879         /*  Check if there is any packet need indicate. */
1880         while (!rtw_is_list_empty(phead)) {
1881                 prhdr = container_of(plist, struct recv_frame, list);
1882                 prframe = (struct recv_frame *)prhdr;
1883                 pattrib = &prframe->attrib;
1884
1885                 if (!SN_LESS(preorder_ctrl->indicate_seq, pattrib->seq_num)) {
1886                         RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_,
1887                                  ("recv_indicatepkts_in_order: indicate=%d seq=%d amsdu=%d\n",
1888                                   preorder_ctrl->indicate_seq, pattrib->seq_num, pattrib->amsdu));
1889                         plist = plist->next;
1890                         rtw_list_delete(&(prframe->list));
1891
1892                         if (SN_EQUAL(preorder_ctrl->indicate_seq, pattrib->seq_num))
1893                                 preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1) & 0xFFF;
1894
1895                         /* Set this as a lock to make sure that only one thread is indicating packet. */
1896
1897                         /* indicate this recv_frame */
1898                         if (!pattrib->amsdu) {
1899                                 if ((!padapter->bDriverStopped) &&
1900                                     (!padapter->bSurpriseRemoved))
1901                                         rtw_recv_indicatepkt(padapter, prframe);/* indicate this recv_frame */
1902                         } else if (pattrib->amsdu == 1) {
1903                                 if (amsdu_to_msdu(padapter, prframe) != _SUCCESS)
1904                                         rtw_free_recvframe(prframe, &precvpriv->free_recv_queue);
1905                         } else {
1906                                 /* error condition; */
1907                         }
1908
1909                         /* Update local variables. */
1910                         bPktInBuf = false;
1911                 } else {
1912                         bPktInBuf = true;
1913                         break;
1914                 }
1915         }
1916         return bPktInBuf;
1917 }
1918
1919 static int recv_indicatepkt_reorder(struct adapter *padapter,
1920                                     struct recv_frame *prframe)
1921 {
1922         int retval = _SUCCESS;
1923         struct rx_pkt_attrib *pattrib = &prframe->attrib;
1924         struct recv_reorder_ctrl *preorder_ctrl = prframe->preorder_ctrl;
1925         struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
1926
1927         if (!pattrib->amsdu) {
1928                 /* s1. */
1929                 wlanhdr_to_ethhdr(prframe);
1930
1931                 if ((pattrib->qos != 1) || (pattrib->eth_type == 0x0806) ||
1932                     (pattrib->ack_policy != 0)) {
1933                         if ((!padapter->bDriverStopped) &&
1934                             (!padapter->bSurpriseRemoved)) {
1935                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("@@@@  recv_indicatepkt_reorder -recv_func recv_indicatepkt\n"));
1936
1937                                 rtw_recv_indicatepkt(padapter, prframe);
1938                                 return _SUCCESS;
1939                         }
1940
1941                         return _FAIL;
1942                 }
1943
1944                 if (!preorder_ctrl->enable) {
1945                         /* indicate this recv_frame */
1946                         preorder_ctrl->indicate_seq = pattrib->seq_num;
1947                         rtw_recv_indicatepkt(padapter, prframe);
1948
1949                         preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1)%4096;
1950                         return _SUCCESS;
1951                 }
1952         } else if (pattrib->amsdu == 1) { /* temp filter -> means didn't support A-MSDUs in a A-MPDU */
1953                 if (!preorder_ctrl->enable) {
1954                         preorder_ctrl->indicate_seq = pattrib->seq_num;
1955                         retval = amsdu_to_msdu(padapter, prframe);
1956
1957                         preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1)%4096;
1958                         return retval;
1959                 }
1960         }
1961
1962         spin_lock_bh(&ppending_recvframe_queue->lock);
1963
1964         RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_,
1965                  ("recv_indicatepkt_reorder: indicate=%d seq=%d\n",
1966                   preorder_ctrl->indicate_seq, pattrib->seq_num));
1967
1968         /* s2. check if winstart_b(indicate_seq) needs to been updated */
1969         if (!check_indicate_seq(preorder_ctrl, pattrib->seq_num)) {
1970                 rtw_recv_indicatepkt(padapter, prframe);
1971
1972                 spin_unlock_bh(&ppending_recvframe_queue->lock);
1973
1974                 goto _success_exit;
1975         }
1976
1977         /* s3. Insert all packet into Reorder Queue to maintain its ordering. */
1978         if (!enqueue_reorder_recvframe(preorder_ctrl, prframe))
1979                 goto _err_exit;
1980
1981         /* s4. */
1982         /*  Indication process. */
1983         /*  After Packet dropping and Sliding Window shifting as above, we can now just indicate the packets */
1984         /*  with the SeqNum smaller than latest WinStart and buffer other packets. */
1985         /*  */
1986         /*  For Rx Reorder condition: */
1987         /*  1. All packets with SeqNum smaller than WinStart => Indicate */
1988         /*  2. All packets with SeqNum larger than or equal to WinStart => Buffer it. */
1989         /*  */
1990
1991         /* recv_indicatepkts_in_order(padapter, preorder_ctrl, true); */
1992         if (recv_indicatepkts_in_order(padapter, preorder_ctrl, false)) {
1993                 _set_timer(&preorder_ctrl->reordering_ctrl_timer, REORDER_WAIT_TIME);
1994                 spin_unlock_bh(&ppending_recvframe_queue->lock);
1995         } else {
1996                 spin_unlock_bh(&ppending_recvframe_queue->lock);
1997                 del_timer_sync(&preorder_ctrl->reordering_ctrl_timer);
1998         }
1999
2000 _success_exit:
2001
2002         return _SUCCESS;
2003
2004 _err_exit:
2005
2006         spin_unlock_bh(&ppending_recvframe_queue->lock);
2007
2008         return _FAIL;
2009 }
2010
2011 void rtw_reordering_ctrl_timeout_handler(void *pcontext)
2012 {
2013         struct recv_reorder_ctrl *preorder_ctrl = (struct recv_reorder_ctrl *)pcontext;
2014         struct adapter *padapter = preorder_ctrl->padapter;
2015         struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
2016
2017         if (padapter->bDriverStopped || padapter->bSurpriseRemoved)
2018                 return;
2019
2020         spin_lock_bh(&ppending_recvframe_queue->lock);
2021
2022         if (recv_indicatepkts_in_order(padapter, preorder_ctrl, true) == true)
2023                 _set_timer(&preorder_ctrl->reordering_ctrl_timer, REORDER_WAIT_TIME);
2024
2025         spin_unlock_bh(&ppending_recvframe_queue->lock);
2026 }
2027
2028 static int process_recv_indicatepkts(struct adapter *padapter,
2029                                      struct recv_frame *prframe)
2030 {
2031         int retval = _SUCCESS;
2032         struct mlme_priv        *pmlmepriv = &padapter->mlmepriv;
2033         struct ht_priv  *phtpriv = &pmlmepriv->htpriv;
2034
2035         if (phtpriv->ht_option) {  /* B/G/N Mode */
2036                 if (recv_indicatepkt_reorder(padapter, prframe) != _SUCCESS) {
2037                         /*  including perform A-MPDU Rx Ordering Buffer Control */
2038                         if ((!padapter->bDriverStopped) &&
2039                             (!padapter->bSurpriseRemoved)) {
2040                                 retval = _FAIL;
2041                                 return retval;
2042                         }
2043                 }
2044         } else { /* B/G mode */
2045                 retval = wlanhdr_to_ethhdr (prframe);
2046                 if (retval != _SUCCESS) {
2047                         RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("wlanhdr_to_ethhdr: drop pkt\n"));
2048                         return retval;
2049                 }
2050
2051                 if ((!padapter->bDriverStopped) &&
2052                     (!padapter->bSurpriseRemoved)) {
2053                         /* indicate this recv_frame */
2054                         RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("@@@@ process_recv_indicatepkts- recv_func recv_indicatepkt\n"));
2055                         rtw_recv_indicatepkt(padapter, prframe);
2056                 } else {
2057                         RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("@@@@ process_recv_indicatepkts- recv_func free_indicatepkt\n"));
2058
2059                         RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("recv_func:bDriverStopped(%d) OR bSurpriseRemoved(%d)", padapter->bDriverStopped, padapter->bSurpriseRemoved));
2060                         retval = _FAIL;
2061                         return retval;
2062                 }
2063         }
2064
2065         return retval;
2066 }
2067
2068 static int recv_func_prehandle(struct adapter *padapter,
2069                                struct recv_frame *rframe)
2070 {
2071         int ret = _SUCCESS;
2072         struct rx_pkt_attrib *pattrib = &rframe->attrib;
2073         struct __queue *pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
2074         struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
2075
2076         if (padapter->registrypriv.mp_mode == 1) {
2077                 if ((check_fwstate(pmlmepriv, WIFI_MP_STATE) == true)) { /* padapter->mppriv.check_mp_pkt == 0)) */
2078                         if (pattrib->crc_err == 1)
2079                                 padapter->mppriv.rx_crcerrpktcount++;
2080                         else
2081                                 padapter->mppriv.rx_pktcount++;
2082
2083                         if (check_fwstate(pmlmepriv, WIFI_MP_LPBK_STATE) == false) {
2084                                 RT_TRACE(_module_rtl871x_recv_c_, _drv_alert_, ("MP - Not in loopback mode , drop pkt\n"));
2085                                 ret = _FAIL;
2086                                 rtw_free_recvframe(rframe, pfree_recv_queue);/* free this recv_frame */
2087                                 goto exit;
2088                         }
2089                 }
2090         }
2091
2092         /* check the frame crtl field and decache */
2093         ret = validate_recv_frame(padapter, rframe);
2094         if (ret != _SUCCESS) {
2095                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("recv_func: validate_recv_frame fail! drop pkt\n"));
2096                 rtw_free_recvframe(rframe, pfree_recv_queue);/* free this recv_frame */
2097                 goto exit;
2098         }
2099
2100 exit:
2101         return ret;
2102 }
2103
2104 static int recv_func_posthandle(struct adapter *padapter,
2105                                 struct recv_frame *prframe)
2106 {
2107         int ret = _SUCCESS;
2108         struct recv_frame *orig_prframe = prframe;
2109         struct recv_priv *precvpriv = &padapter->recvpriv;
2110         struct __queue *pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
2111
2112         /*  DATA FRAME */
2113         rtw_led_control(padapter, LED_CTL_RX);
2114
2115         prframe = decryptor(padapter, prframe);
2116         if (prframe == NULL) {
2117                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("decryptor: drop pkt\n"));
2118                 ret = _FAIL;
2119                 goto _recv_data_drop;
2120         }
2121
2122         prframe = recvframe_chk_defrag(padapter, prframe);
2123         if (prframe == NULL) {
2124                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("recvframe_chk_defrag: drop pkt\n"));
2125                 goto _recv_data_drop;
2126         }
2127
2128         prframe = portctrl(padapter, prframe);
2129         if (prframe == NULL) {
2130                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("portctrl: drop pkt\n"));
2131                 ret = _FAIL;
2132                 goto _recv_data_drop;
2133         }
2134
2135         count_rx_stats(padapter, prframe, NULL);
2136
2137         ret = process_recv_indicatepkts(padapter, prframe);
2138         if (ret != _SUCCESS) {
2139                 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("recv_func: process_recv_indicatepkts fail!\n"));
2140                 rtw_free_recvframe(orig_prframe, pfree_recv_queue);/* free this recv_frame */
2141                 goto _recv_data_drop;
2142         }
2143         return ret;
2144
2145 _recv_data_drop:
2146         precvpriv->rx_drop++;
2147         return ret;
2148 }
2149
2150 static int recv_func(struct adapter *padapter, struct recv_frame *rframe)
2151 {
2152         int ret;
2153         struct rx_pkt_attrib *prxattrib = &rframe->attrib;
2154         struct security_priv *psecuritypriv = &padapter->securitypriv;
2155         struct mlme_priv *mlmepriv = &padapter->mlmepriv;
2156
2157         /* check if need to handle uc_swdec_pending_queue*/
2158         if (check_fwstate(mlmepriv, WIFI_STATION_STATE) && psecuritypriv->busetkipkey) {
2159                 struct recv_frame *pending_frame;
2160
2161                 while ((pending_frame = rtw_alloc_recvframe(&padapter->recvpriv.uc_swdec_pending_queue))) {
2162                         if (recv_func_posthandle(padapter, pending_frame) == _SUCCESS)
2163                                 DBG_88E("%s: dequeue uc_swdec_pending_queue\n", __func__);
2164                 }
2165         }
2166
2167         ret = recv_func_prehandle(padapter, rframe);
2168
2169         if (ret == _SUCCESS) {
2170                 /* check if need to enqueue into uc_swdec_pending_queue*/
2171                 if (check_fwstate(mlmepriv, WIFI_STATION_STATE) &&
2172                     !IS_MCAST(prxattrib->ra) && prxattrib->encrypt > 0 &&
2173                     (prxattrib->bdecrypted == 0 || psecuritypriv->sw_decrypt) &&
2174                     !is_wep_enc(psecuritypriv->dot11PrivacyAlgrthm) &&
2175                     !psecuritypriv->busetkipkey) {
2176                         rtw_enqueue_recvframe(rframe, &padapter->recvpriv.uc_swdec_pending_queue);
2177                         DBG_88E("%s: no key, enqueue uc_swdec_pending_queue\n", __func__);
2178                         goto exit;
2179                 }
2180
2181                 ret = recv_func_posthandle(padapter, rframe);
2182         }
2183
2184 exit:
2185         return ret;
2186 }
2187
2188 s32 rtw_recv_entry(struct recv_frame *precvframe)
2189 {
2190         struct adapter *padapter;
2191         struct recv_priv *precvpriv;
2192         s32 ret = _SUCCESS;
2193
2194
2195         padapter = precvframe->adapter;
2196
2197         precvpriv = &padapter->recvpriv;
2198
2199         ret = recv_func(padapter, precvframe);
2200         if (ret == _FAIL) {
2201                 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("rtw_recv_entry: recv_func return fail!!!\n"));
2202                 goto _recv_entry_drop;
2203         }
2204
2205         precvpriv->rx_pkts++;
2206
2207
2208         return ret;
2209
2210 _recv_entry_drop:
2211
2212         if (padapter->registrypriv.mp_mode == 1)
2213                 padapter->mppriv.rx_pktloss = precvpriv->rx_drop;
2214
2215
2216         return ret;
2217 }
2218
2219 void rtw_signal_stat_timer_hdl(RTW_TIMER_HDL_ARGS)
2220 {
2221         struct adapter *adapter = (struct adapter *)FunctionContext;
2222         struct recv_priv *recvpriv = &adapter->recvpriv;
2223
2224         u32 tmp_s, tmp_q;
2225         u8 avg_signal_strength = 0;
2226         u8 avg_signal_qual = 0;
2227         u8 _alpha = 3; /*  this value is based on converging_constant = 5000 and sampling_interval = 1000 */
2228
2229         if (adapter->recvpriv.is_signal_dbg) {
2230                 /* update the user specific value, signal_strength_dbg, to signal_strength, rssi */
2231                 adapter->recvpriv.signal_strength = adapter->recvpriv.signal_strength_dbg;
2232                 adapter->recvpriv.rssi = (s8)translate_percentage_to_dbm((u8)adapter->recvpriv.signal_strength_dbg);
2233         } else {
2234                 if (recvpriv->signal_strength_data.update_req == 0) {/*  update_req is clear, means we got rx */
2235                         avg_signal_strength = recvpriv->signal_strength_data.avg_val;
2236                         /*  after avg_vals are acquired, we can re-stat the signal values */
2237                         recvpriv->signal_strength_data.update_req = 1;
2238                 }
2239
2240                 if (recvpriv->signal_qual_data.update_req == 0) {/*  update_req is clear, means we got rx */
2241                         avg_signal_qual = recvpriv->signal_qual_data.avg_val;
2242                         /*  after avg_vals are acquired, we can re-stat the signal values */
2243                         recvpriv->signal_qual_data.update_req = 1;
2244                 }
2245
2246                 /* update value of signal_strength, rssi, signal_qual */
2247                 if (check_fwstate(&adapter->mlmepriv, _FW_UNDER_SURVEY) == false) {
2248                         tmp_s = (avg_signal_strength+(_alpha-1)*recvpriv->signal_strength);
2249                         if (tmp_s % _alpha)
2250                                 tmp_s = tmp_s/_alpha + 1;
2251                         else
2252                                 tmp_s = tmp_s/_alpha;
2253                         if (tmp_s > 100)
2254                                 tmp_s = 100;
2255
2256                         tmp_q = (avg_signal_qual+(_alpha-1)*recvpriv->signal_qual);
2257                         if (tmp_q % _alpha)
2258                                 tmp_q = tmp_q/_alpha + 1;
2259                         else
2260                                 tmp_q = tmp_q/_alpha;
2261                         if (tmp_q > 100)
2262                                 tmp_q = 100;
2263
2264                         recvpriv->signal_strength = tmp_s;
2265                         recvpriv->rssi = (s8)translate_percentage_to_dbm(tmp_s);
2266                         recvpriv->signal_qual = tmp_q;
2267                 }
2268         }
2269         rtw_set_signal_stat_timer(recvpriv);
2270 }