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