1 /******************************************************************************
4 * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved.
5 * Linux device driver for RTL8192SU
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of version 2 of the GNU General Public License as
9 * published by the Free Software Foundation.
11 * This program is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 * You should have received a copy of the GNU General Public License along with
17 * this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
20 * Modifications for inclusion into the Linux staging tree are
21 * Copyright(c) 2010 Larry Finger. All rights reserved.
23 * Contact information:
24 * WLAN FAE <wlanfae@realtek.com>
25 * Larry Finger <Larry.Finger@lwfinger.net>
27 ******************************************************************************/
29 #define _RTL871X_RECV_C_
32 #include <linux/slab.h>
33 #include <linux/if_ether.h>
34 #include <linux/kmemleak.h>
35 #include <linux/etherdevice.h>
37 #include "osdep_service.h"
38 #include "drv_types.h"
39 #include "recv_osdep.h"
40 #include "mlme_osdep.h"
45 static const u8 SNAP_ETH_TYPE_IPX[2] = {0x81, 0x37};
47 /* Datagram Delivery Protocol */
48 static const u8 SNAP_ETH_TYPE_APPLETALK_AARP[2] = {0x80, 0xf3};
50 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
51 static const u8 bridge_tunnel_header[] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8};
53 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
54 static const u8 rfc1042_header[] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00};
56 void _r8712_init_sta_recv_priv(struct sta_recv_priv *psta_recvpriv)
58 memset((u8 *)psta_recvpriv, 0, sizeof(struct sta_recv_priv));
59 spin_lock_init(&psta_recvpriv->lock);
60 _init_queue(&psta_recvpriv->defrag_q);
63 sint _r8712_init_recv_priv(struct recv_priv *precvpriv,
64 struct _adapter *padapter)
67 union recv_frame *precvframe;
69 memset((unsigned char *)precvpriv, 0, sizeof(struct recv_priv));
70 spin_lock_init(&precvpriv->lock);
71 _init_queue(&precvpriv->free_recv_queue);
72 _init_queue(&precvpriv->recv_pending_queue);
73 precvpriv->adapter = padapter;
74 precvpriv->free_recvframe_cnt = NR_RECVFRAME;
75 precvpriv->pallocated_frame_buf = kmalloc(NR_RECVFRAME *
76 sizeof(union recv_frame) + RXFRAME_ALIGN_SZ,
78 if (precvpriv->pallocated_frame_buf == NULL)
80 kmemleak_not_leak(precvpriv->pallocated_frame_buf);
81 memset(precvpriv->pallocated_frame_buf, 0, NR_RECVFRAME *
82 sizeof(union recv_frame) + RXFRAME_ALIGN_SZ);
83 precvpriv->precv_frame_buf = precvpriv->pallocated_frame_buf +
85 ((addr_t)(precvpriv->pallocated_frame_buf) &
86 (RXFRAME_ALIGN_SZ - 1));
87 precvframe = (union recv_frame *)precvpriv->precv_frame_buf;
88 for (i = 0; i < NR_RECVFRAME; i++) {
89 INIT_LIST_HEAD(&(precvframe->u.list));
90 list_add_tail(&(precvframe->u.list),
91 &(precvpriv->free_recv_queue.queue));
92 r8712_os_recv_resource_alloc(padapter, precvframe);
93 precvframe->u.hdr.adapter = padapter;
96 precvpriv->rx_pending_cnt = 1;
97 return r8712_init_recv_priv(precvpriv, padapter);
100 void _r8712_free_recv_priv(struct recv_priv *precvpriv)
102 kfree(precvpriv->pallocated_frame_buf);
103 r8712_free_recv_priv(precvpriv);
106 union recv_frame *r8712_alloc_recvframe(struct __queue *pfree_recv_queue)
109 union recv_frame *precvframe;
110 struct list_head *plist, *phead;
111 struct _adapter *padapter;
112 struct recv_priv *precvpriv;
114 spin_lock_irqsave(&pfree_recv_queue->lock, irqL);
115 if (list_empty(&pfree_recv_queue->queue)) {
118 phead = &pfree_recv_queue->queue;
120 precvframe = LIST_CONTAINOR(plist, union recv_frame, u);
121 list_del_init(&precvframe->u.hdr.list);
122 padapter = precvframe->u.hdr.adapter;
123 if (padapter != NULL) {
124 precvpriv = &padapter->recvpriv;
125 if (pfree_recv_queue == &precvpriv->free_recv_queue)
126 precvpriv->free_recvframe_cnt--;
129 spin_unlock_irqrestore(&pfree_recv_queue->lock, irqL);
134 caller : defrag; recvframe_chk_defrag in recv_thread (passive)
135 pframequeue: defrag_queue : will be accessed in recv_thread (passive)
137 using spin_lock to protect
141 void r8712_free_recvframe_queue(struct __queue *pframequeue,
142 struct __queue *pfree_recv_queue)
144 union recv_frame *precvframe;
145 struct list_head *plist, *phead;
147 spin_lock(&pframequeue->lock);
148 phead = &pframequeue->queue;
150 while (!end_of_queue_search(phead, plist)) {
151 precvframe = LIST_CONTAINOR(plist, union recv_frame, u);
153 r8712_free_recvframe(precvframe, pfree_recv_queue);
155 spin_unlock(&pframequeue->lock);
158 sint r8712_recvframe_chkmic(struct _adapter *adapter,
159 union recv_frame *precvframe)
161 sint i, res = _SUCCESS;
165 u8 *pframe, *payload, *pframemic;
166 u8 *mickey, idx, *iv;
167 struct sta_info *stainfo;
168 struct rx_pkt_attrib *prxattrib = &precvframe->u.hdr.attrib;
169 struct security_priv *psecuritypriv = &adapter->securitypriv;
171 stainfo = r8712_get_stainfo(&adapter->stapriv, &prxattrib->ta[0]);
172 if (prxattrib->encrypt == _TKIP_) {
173 /* calculate mic code */
174 if (stainfo != NULL) {
175 if (IS_MCAST(prxattrib->ra)) {
176 iv = precvframe->u.hdr.rx_data +
179 mickey = &psecuritypriv->XGrprxmickey[(((idx >>
180 6) & 0x3)) - 1].skey[0];
181 if (!psecuritypriv->binstallGrpkey)
184 mickey = &stainfo->tkiprxmickey.skey[0];
186 /*icv_len included the mic code*/
187 datalen = precvframe->u.hdr.len - prxattrib->hdrlen -
188 prxattrib->iv_len - prxattrib->icv_len - 8;
189 pframe = precvframe->u.hdr.rx_data;
190 payload = pframe + prxattrib->hdrlen +
192 seccalctkipmic(mickey, pframe, payload, datalen,
194 (unsigned char)prxattrib->priority);
195 pframemic = payload + datalen;
197 for (i = 0; i < 8; i++) {
198 if (miccode[i] != *(pframemic + i))
202 if (prxattrib->bdecrypted)
203 r8712_handle_tkip_mic_err(adapter,
204 (u8)IS_MCAST(prxattrib->ra));
208 if (!psecuritypriv->bcheck_grpkey &&
209 IS_MCAST(prxattrib->ra))
210 psecuritypriv->bcheck_grpkey = true;
212 recvframe_pull_tail(precvframe, 8);
218 /* decrypt and set the ivlen,icvlen of the recv_frame */
219 union recv_frame *r8712_decryptor(struct _adapter *padapter,
220 union recv_frame *precv_frame)
222 struct rx_pkt_attrib *prxattrib = &precv_frame->u.hdr.attrib;
223 struct security_priv *psecuritypriv = &padapter->securitypriv;
224 union recv_frame *return_packet = precv_frame;
226 if ((prxattrib->encrypt > 0) && ((prxattrib->bdecrypted == 0) ||
227 psecuritypriv->sw_decrypt)) {
228 psecuritypriv->hw_decrypted = false;
229 switch (prxattrib->encrypt) {
232 r8712_wep_decrypt(padapter, (u8 *)precv_frame);
235 r8712_tkip_decrypt(padapter, (u8 *)precv_frame);
238 r8712_aes_decrypt(padapter, (u8 *)precv_frame);
243 } else if (prxattrib->bdecrypted == 1) {
244 psecuritypriv->hw_decrypted = true;
246 return return_packet;
248 /*###set the security information in the recv_frame */
249 union recv_frame *r8712_portctrl(struct _adapter *adapter,
250 union recv_frame *precv_frame)
254 struct recv_frame_hdr *pfhdr;
255 struct sta_info *psta;
256 struct sta_priv *pstapriv;
257 union recv_frame *prtnframe;
260 pstapriv = &adapter->stapriv;
261 ptr = get_recvframe_data(precv_frame);
262 pfhdr = &precv_frame->u.hdr;
263 psta_addr = pfhdr->attrib.ta;
264 psta = r8712_get_stainfo(pstapriv, psta_addr);
265 auth_alg = adapter->securitypriv.AuthAlgrthm;
268 ptr = ptr + pfhdr->attrib.hdrlen + LLC_HEADER_SIZE;
269 memcpy(ðer_type, ptr, 2);
270 ether_type = ntohs((unsigned short)ether_type);
272 if ((psta != NULL) && (psta->ieee8021x_blocked)) {
274 * only accept EAPOL frame */
275 if (ether_type == 0x888e) {
276 prtnframe = precv_frame;
279 r8712_free_recvframe(precv_frame,
280 &adapter->recvpriv.free_recv_queue);
285 * check decryption status, and decrypt the
287 prtnframe = precv_frame;
288 /* check is the EAPOL frame or not (Rekey) */
289 if (ether_type == 0x888e) {
291 prtnframe = precv_frame;
295 prtnframe = precv_frame;
300 static sint recv_decache(union recv_frame *precv_frame, u8 bretry,
301 struct stainfo_rxcache *prxcache)
303 sint tid = precv_frame->u.hdr.attrib.priority;
304 u16 seq_ctrl = ((precv_frame->u.hdr.attrib.seq_num & 0xffff) << 4) |
305 (precv_frame->u.hdr.attrib.frag_num & 0xf);
309 if (seq_ctrl == prxcache->tid_rxseq[tid])
311 prxcache->tid_rxseq[tid] = seq_ctrl;
315 static sint sta2sta_data_frame(struct _adapter *adapter,
316 union recv_frame *precv_frame,
317 struct sta_info **psta)
319 u8 *ptr = precv_frame->u.hdr.rx_data;
321 struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
322 struct sta_priv *pstapriv = &adapter->stapriv;
323 struct mlme_priv *pmlmepriv = &adapter->mlmepriv;
324 u8 *mybssid = get_bssid(pmlmepriv);
325 u8 *myhwaddr = myid(&adapter->eeprompriv);
327 sint bmcast = IS_MCAST(pattrib->dst);
329 if (check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) ||
330 check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE)) {
331 /* filter packets that SA is myself or multicast or broadcast */
332 if (!memcmp(myhwaddr, pattrib->src, ETH_ALEN))
334 if ((memcmp(myhwaddr, pattrib->dst, ETH_ALEN)) && (!bmcast))
336 if (is_zero_ether_addr(pattrib->bssid) ||
337 is_zero_ether_addr(mybssid) ||
338 (memcmp(pattrib->bssid, mybssid, ETH_ALEN)))
340 sta_addr = pattrib->src;
341 } else if (check_fwstate(pmlmepriv, WIFI_STATION_STATE)) {
342 /* For Station mode, sa and bssid should always be BSSID,
343 * and DA is my mac-address */
344 if (memcmp(pattrib->bssid, pattrib->src, ETH_ALEN))
346 sta_addr = pattrib->bssid;
347 } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
349 /* For AP mode, if DA == MCAST, then BSSID should
351 if (!IS_MCAST(pattrib->bssid))
353 } else { /* not mc-frame */
354 /* For AP mode, if DA is non-MCAST, then it must be
355 * BSSID, and bssid == BSSID */
356 if (memcmp(pattrib->bssid, pattrib->dst, ETH_ALEN))
358 sta_addr = pattrib->src;
360 } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
361 memcpy(pattrib->dst, GetAddr1Ptr(ptr), ETH_ALEN);
362 memcpy(pattrib->src, GetAddr2Ptr(ptr), ETH_ALEN);
363 memcpy(pattrib->bssid, GetAddr3Ptr(ptr), ETH_ALEN);
364 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
365 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
371 *psta = r8712_get_bcmc_stainfo(adapter);
373 *psta = r8712_get_stainfo(pstapriv, sta_addr); /* get ap_info */
375 if (check_fwstate(pmlmepriv, WIFI_MP_STATE))
376 adapter->mppriv.rx_pktloss++;
382 static sint ap2sta_data_frame(struct _adapter *adapter,
383 union recv_frame *precv_frame,
384 struct sta_info **psta)
386 u8 *ptr = precv_frame->u.hdr.rx_data;
387 struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
388 struct sta_priv *pstapriv = &adapter->stapriv;
389 struct mlme_priv *pmlmepriv = &adapter->mlmepriv;
390 u8 *mybssid = get_bssid(pmlmepriv);
391 u8 *myhwaddr = myid(&adapter->eeprompriv);
392 sint bmcast = IS_MCAST(pattrib->dst);
394 if (check_fwstate(pmlmepriv, WIFI_STATION_STATE) &&
395 check_fwstate(pmlmepriv, _FW_LINKED)) {
396 /* if NULL-frame, drop packet */
397 if ((GetFrameSubType(ptr)) == WIFI_DATA_NULL)
399 /* drop QoS-SubType Data, including QoS NULL,
400 * excluding QoS-Data */
401 if ((GetFrameSubType(ptr) & WIFI_QOS_DATA_TYPE) ==
402 WIFI_QOS_DATA_TYPE) {
403 if (GetFrameSubType(ptr) & (BIT(4) | BIT(5) | BIT(6)))
407 /* filter packets that SA is myself or multicast or broadcast */
408 if (!memcmp(myhwaddr, pattrib->src, ETH_ALEN))
411 /* da should be for me */
412 if ((memcmp(myhwaddr, pattrib->dst, ETH_ALEN)) && (!bmcast))
415 if (is_zero_ether_addr(pattrib->bssid) ||
416 is_zero_ether_addr(mybssid) ||
417 (memcmp(pattrib->bssid, mybssid, ETH_ALEN)))
420 *psta = r8712_get_bcmc_stainfo(adapter);
422 *psta = r8712_get_stainfo(pstapriv, pattrib->bssid);
425 } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE) &&
426 check_fwstate(pmlmepriv, _FW_LINKED)) {
427 memcpy(pattrib->dst, GetAddr1Ptr(ptr), ETH_ALEN);
428 memcpy(pattrib->src, GetAddr2Ptr(ptr), ETH_ALEN);
429 memcpy(pattrib->bssid, GetAddr3Ptr(ptr), ETH_ALEN);
430 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
431 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
432 memcpy(pattrib->bssid, mybssid, ETH_ALEN);
433 *psta = r8712_get_stainfo(pstapriv, pattrib->bssid);
442 static sint sta2ap_data_frame(struct _adapter *adapter,
443 union recv_frame *precv_frame,
444 struct sta_info **psta)
446 struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
447 struct sta_priv *pstapriv = &adapter->stapriv;
448 struct mlme_priv *pmlmepriv = &adapter->mlmepriv;
449 unsigned char *mybssid = get_bssid(pmlmepriv);
451 if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
452 /* For AP mode, if DA is non-MCAST, then it must be BSSID,
454 * For AP mode, RA=BSSID, TX=STA(SRC_ADDR), A3=DST_ADDR */
455 if (memcmp(pattrib->bssid, mybssid, ETH_ALEN))
457 *psta = r8712_get_stainfo(pstapriv, pattrib->src);
464 static sint validate_recv_ctrl_frame(struct _adapter *adapter,
465 union recv_frame *precv_frame)
470 static sint validate_recv_mgnt_frame(struct _adapter *adapter,
471 union recv_frame *precv_frame)
477 static sint validate_recv_data_frame(struct _adapter *adapter,
478 union recv_frame *precv_frame)
482 u8 *psa, *pda, *pbssid;
483 struct sta_info *psta = NULL;
484 u8 *ptr = precv_frame->u.hdr.rx_data;
485 struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
486 struct security_priv *psecuritypriv = &adapter->securitypriv;
488 bretry = GetRetry(ptr);
491 pbssid = get_hdr_bssid(ptr);
494 memcpy(pattrib->dst, pda, ETH_ALEN);
495 memcpy(pattrib->src, psa, ETH_ALEN);
496 memcpy(pattrib->bssid, pbssid, ETH_ALEN);
497 switch (pattrib->to_fr_ds) {
499 memcpy(pattrib->ra, pda, ETH_ALEN);
500 memcpy(pattrib->ta, psa, ETH_ALEN);
501 res = sta2sta_data_frame(adapter, precv_frame, &psta);
504 memcpy(pattrib->ra, pda, ETH_ALEN);
505 memcpy(pattrib->ta, pbssid, ETH_ALEN);
506 res = ap2sta_data_frame(adapter, precv_frame, &psta);
509 memcpy(pattrib->ra, pbssid, ETH_ALEN);
510 memcpy(pattrib->ta, psa, ETH_ALEN);
511 res = sta2ap_data_frame(adapter, precv_frame, &psta);
514 memcpy(pattrib->ra, GetAddr1Ptr(ptr), ETH_ALEN);
515 memcpy(pattrib->ta, GetAddr2Ptr(ptr), ETH_ALEN);
524 precv_frame->u.hdr.psta = psta;
526 /* parsing QC field */
527 if (pattrib->qos == 1) {
528 pattrib->priority = GetPriority((ptr + 24));
529 pattrib->ack_policy = GetAckpolicy((ptr + 24));
530 pattrib->amsdu = GetAMsdu((ptr + 24));
531 pattrib->hdrlen = pattrib->to_fr_ds == 3 ? 32 : 26;
533 pattrib->priority = 0;
534 pattrib->hdrlen = (pattrib->to_fr_ds == 3) ? 30 : 24;
537 if (pattrib->order)/*HT-CTRL 11n*/
538 pattrib->hdrlen += 4;
539 precv_frame->u.hdr.preorder_ctrl =
540 &psta->recvreorder_ctrl[pattrib->priority];
542 /* decache, drop duplicate recv packets */
543 if (recv_decache(precv_frame, bretry, &psta->sta_recvpriv.rxcache) ==
547 if (pattrib->privacy) {
548 GET_ENCRY_ALGO(psecuritypriv, psta, pattrib->encrypt,
549 IS_MCAST(pattrib->ra));
550 SET_ICE_IV_LEN(pattrib->iv_len, pattrib->icv_len,
553 pattrib->encrypt = 0;
554 pattrib->iv_len = pattrib->icv_len = 0;
559 sint r8712_validate_recv_frame(struct _adapter *adapter,
560 union recv_frame *precv_frame)
562 /*shall check frame subtype, to / from ds, da, bssid */
563 /*then call check if rx seq/frag. duplicated.*/
567 sint retval = _SUCCESS;
568 struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
570 u8 *ptr = precv_frame->u.hdr.rx_data;
571 u8 ver = (unsigned char)(*ptr) & 0x3;
576 type = GetFrameType(ptr);
577 subtype = GetFrameSubType(ptr); /*bit(7)~bit(2)*/
578 pattrib->to_fr_ds = get_tofr_ds(ptr);
579 pattrib->frag_num = GetFragNum(ptr);
580 pattrib->seq_num = GetSequence(ptr);
581 pattrib->pw_save = GetPwrMgt(ptr);
582 pattrib->mfrag = GetMFrag(ptr);
583 pattrib->mdata = GetMData(ptr);
584 pattrib->privacy = GetPrivacy(ptr);
585 pattrib->order = GetOrder(ptr);
587 case WIFI_MGT_TYPE: /*mgnt*/
588 retval = validate_recv_mgnt_frame(adapter, precv_frame);
590 case WIFI_CTRL_TYPE:/*ctrl*/
591 retval = validate_recv_ctrl_frame(adapter, precv_frame);
593 case WIFI_DATA_TYPE: /*data*/
594 pattrib->qos = (subtype & BIT(7)) ? 1 : 0;
595 retval = validate_recv_data_frame(adapter, precv_frame);
603 sint r8712_wlanhdr_to_ethhdr(union recv_frame *precvframe)
605 /*remove the wlanhdr and add the eth_hdr*/
610 struct ieee80211_snap_hdr *psnap;
611 struct _adapter *adapter = precvframe->u.hdr.adapter;
612 struct mlme_priv *pmlmepriv = &adapter->mlmepriv;
614 u8 *ptr = get_recvframe_data(precvframe); /*point to frame_ctrl field*/
615 struct rx_pkt_attrib *pattrib = &precvframe->u.hdr.attrib;
617 if (pattrib->encrypt)
618 recvframe_pull_tail(precvframe, pattrib->icv_len);
619 psnap = (struct ieee80211_snap_hdr *)(ptr + pattrib->hdrlen +
621 psnap_type = ptr + pattrib->hdrlen + pattrib->iv_len + SNAP_SIZE;
622 /* convert hdr + possible LLC headers into Ethernet header */
623 if ((!memcmp(psnap, (void *)rfc1042_header, SNAP_SIZE) &&
624 (memcmp(psnap_type, (void *)SNAP_ETH_TYPE_IPX, 2)) &&
625 (memcmp(psnap_type, (void *)SNAP_ETH_TYPE_APPLETALK_AARP, 2))) ||
626 !memcmp(psnap, (void *)bridge_tunnel_header, SNAP_SIZE)) {
627 /* remove RFC1042 or Bridge-Tunnel encapsulation and
628 * replace EtherType */
631 /* Leave Ethernet header part of hdr and full payload */
634 rmv_len = pattrib->hdrlen + pattrib->iv_len +
635 (bsnaphdr ? SNAP_SIZE : 0);
636 len = precvframe->u.hdr.len - rmv_len;
637 if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
641 /* append rx status for mp test packets */
642 ptr = recvframe_pull(precvframe, (rmv_len -
643 sizeof(struct ethhdr) + 2) - 24);
644 memcpy(ptr, get_rxmem(precvframe), 24);
647 ptr = recvframe_pull(precvframe, (rmv_len -
648 sizeof(struct ethhdr) + (bsnaphdr ? 2 : 0)));
650 memcpy(ptr, pattrib->dst, ETH_ALEN);
651 memcpy(ptr + ETH_ALEN, pattrib->src, ETH_ALEN);
654 memcpy(ptr + 12, &len, 2);
659 s32 r8712_recv_entry(union recv_frame *precvframe)
661 struct _adapter *padapter;
662 struct recv_priv *precvpriv;
666 padapter = precvframe->u.hdr.adapter;
667 precvpriv = &(padapter->recvpriv);
669 padapter->ledpriv.LedControlHandler(padapter, LED_CTL_RX);
671 ret = recv_func(padapter, precvframe);
673 goto _recv_entry_drop;
674 precvpriv->rx_pkts++;
675 precvpriv->rx_bytes += (uint)(precvframe->u.hdr.rx_tail -
676 precvframe->u.hdr.rx_data);
679 precvpriv->rx_drop++;
680 padapter->mppriv.rx_pktloss = precvpriv->rx_drop;