]> git.karo-electronics.de Git - mv-sheeva.git/blob - drivers/staging/rtl8712/rtl871x_recv.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
[mv-sheeva.git] / drivers / staging / rtl8712 / rtl871x_recv.c
1 /******************************************************************************
2  * rtl871x_recv.c
3  *
4  * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved.
5  * Linux device driver for RTL8192SU
6  *
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.
10  *
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
14  * more details.
15  *
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
19  *
20  * Modifications for inclusion into the Linux staging tree are
21  * Copyright(c) 2010 Larry Finger. All rights reserved.
22  *
23  * Contact information:
24  * WLAN FAE <wlanfae@realtek.com>
25  * Larry Finger <Larry.Finger@lwfinger.net>
26  *
27  ******************************************************************************/
28
29 #define _RTL871X_RECV_C_
30
31 #include "osdep_service.h"
32 #include "drv_types.h"
33 #include "recv_osdep.h"
34 #include "mlme_osdep.h"
35 #include "ip.h"
36 #include "if_ether.h"
37 #include "ethernet.h"
38 #include "usb_ops.h"
39 #include "wifi.h"
40
41 static const u8 SNAP_ETH_TYPE_IPX[2] = {0x81, 0x37};
42
43 /* Datagram Delivery Protocol */
44 static const u8 SNAP_ETH_TYPE_APPLETALK_AARP[2] = {0x80, 0xf3};
45
46 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
47 static const u8 bridge_tunnel_header[] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8};
48
49 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
50 static const u8 rfc1042_header[] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00};
51
52 void _r8712_init_sta_recv_priv(struct sta_recv_priv *psta_recvpriv)
53 {
54         memset((u8 *)psta_recvpriv, 0, sizeof(struct sta_recv_priv));
55         spin_lock_init(&psta_recvpriv->lock);
56         _init_queue(&psta_recvpriv->defrag_q);
57 }
58
59 sint _r8712_init_recv_priv(struct recv_priv *precvpriv,
60                            struct _adapter *padapter)
61 {
62         sint i;
63         union recv_frame *precvframe;
64
65          memset((unsigned char *)precvpriv, 0, sizeof(struct  recv_priv));
66         spin_lock_init(&precvpriv->lock);
67         _init_queue(&precvpriv->free_recv_queue);
68         _init_queue(&precvpriv->recv_pending_queue);
69         precvpriv->adapter = padapter;
70         precvpriv->free_recvframe_cnt = NR_RECVFRAME;
71         precvpriv->pallocated_frame_buf = _malloc(NR_RECVFRAME *
72                                            sizeof(union recv_frame) +
73                                            RXFRAME_ALIGN_SZ);
74         if (precvpriv->pallocated_frame_buf == NULL)
75                 return _FAIL;
76         memset(precvpriv->pallocated_frame_buf, 0, NR_RECVFRAME *
77                 sizeof(union recv_frame) + RXFRAME_ALIGN_SZ);
78         precvpriv->precv_frame_buf = precvpriv->pallocated_frame_buf +
79                                     RXFRAME_ALIGN_SZ -
80                                     ((addr_t)(precvpriv->pallocated_frame_buf) &
81                                     (RXFRAME_ALIGN_SZ-1));
82         precvframe = (union recv_frame *)precvpriv->precv_frame_buf;
83         for (i = 0; i < NR_RECVFRAME; i++) {
84                 _init_listhead(&(precvframe->u.list));
85                 list_insert_tail(&(precvframe->u.list),
86                                  &(precvpriv->free_recv_queue.queue));
87                 r8712_os_recv_resource_alloc(padapter, precvframe);
88                 precvframe->u.hdr.adapter = padapter;
89                 precvframe++;
90         }
91         precvpriv->rx_pending_cnt = 1;
92         sema_init(&precvpriv->allrxreturnevt, 0);
93         return r8712_init_recv_priv(precvpriv, padapter);
94 }
95
96 void _r8712_free_recv_priv(struct recv_priv *precvpriv)
97 {
98         kfree(precvpriv->pallocated_frame_buf);
99         r8712_free_recv_priv(precvpriv);
100 }
101
102 union recv_frame *r8712_alloc_recvframe(struct  __queue *pfree_recv_queue)
103 {
104         unsigned long irqL;
105         union recv_frame  *precvframe;
106         struct list_head *plist, *phead;
107         struct _adapter *padapter;
108         struct recv_priv *precvpriv;
109
110         spin_lock_irqsave(&pfree_recv_queue->lock, irqL);
111         if (_queue_empty(pfree_recv_queue) == true)
112                 precvframe = NULL;
113         else {
114                 phead = get_list_head(pfree_recv_queue);
115                 plist = get_next(phead);
116                 precvframe = LIST_CONTAINOR(plist, union recv_frame, u);
117                 list_delete(&precvframe->u.hdr.list);
118                 padapter = precvframe->u.hdr.adapter;
119                 if (padapter != NULL) {
120                         precvpriv = &padapter->recvpriv;
121                         if (pfree_recv_queue == &precvpriv->free_recv_queue)
122                                 precvpriv->free_recvframe_cnt--;
123                 }
124         }
125         spin_unlock_irqrestore(&pfree_recv_queue->lock, irqL);
126         return precvframe;
127 }
128
129 /*
130 caller : defrag; recvframe_chk_defrag in recv_thread  (passive)
131 pframequeue: defrag_queue : will be accessed in recv_thread  (passive)
132
133 using spin_lock to protect
134
135 */
136
137 void r8712_free_recvframe_queue(struct  __queue *pframequeue,
138                                 struct  __queue *pfree_recv_queue)
139 {
140         union   recv_frame *precvframe;
141         struct list_head *plist, *phead;
142
143         spin_lock(&pframequeue->lock);
144         phead = get_list_head(pframequeue);
145         plist = get_next(phead);
146         while (end_of_queue_search(phead, plist) == false) {
147                 precvframe = LIST_CONTAINOR(plist, union recv_frame, u);
148                 plist = get_next(plist);
149                 r8712_free_recvframe(precvframe, pfree_recv_queue);
150         }
151         spin_unlock(&pframequeue->lock);
152 }
153
154 sint r8712_recvframe_chkmic(struct _adapter *adapter,
155                             union recv_frame *precvframe)
156 {
157         sint i, res = _SUCCESS;
158         u32     datalen;
159         u8 miccode[8];
160         u8 bmic_err = false;
161         u8 *pframe, *payload, *pframemic;
162         u8   *mickey, idx, *iv;
163         struct  sta_info *stainfo;
164         struct  rx_pkt_attrib *prxattrib = &precvframe->u.hdr.attrib;
165         struct  security_priv *psecuritypriv = &adapter->securitypriv;
166
167         stainfo = r8712_get_stainfo(&adapter->stapriv, &prxattrib->ta[0]);
168         if (prxattrib->encrypt == _TKIP_) {
169                 /* calculate mic code */
170                 if (stainfo != NULL) {
171                         if (IS_MCAST(prxattrib->ra)) {
172                                 iv = precvframe->u.hdr.rx_data +
173                                      prxattrib->hdrlen;
174                                 idx = iv[3];
175                                 mickey = &psecuritypriv->XGrprxmickey[(((idx >>
176                                          6) & 0x3)) - 1].skey[0];
177                                 if (psecuritypriv->binstallGrpkey == false)
178                                         return _FAIL;
179                         } else
180                                 mickey = &stainfo->tkiprxmickey.skey[0];
181                         /*icv_len included the mic code*/
182                         datalen = precvframe->u.hdr.len - prxattrib->hdrlen -
183                                   prxattrib->iv_len - prxattrib->icv_len - 8;
184                         pframe = precvframe->u.hdr.rx_data;
185                         payload = pframe + prxattrib->hdrlen +
186                                   prxattrib->iv_len;
187                         seccalctkipmic(mickey, pframe, payload, datalen,
188                                        &miccode[0],
189                                        (unsigned char)prxattrib->priority);
190                         pframemic = payload + datalen;
191                         bmic_err = false;
192                         for (i = 0; i < 8; i++) {
193                                 if (miccode[i] != *(pframemic + i))
194                                         bmic_err = true;
195                         }
196                         if (bmic_err == true) {
197                                 if (prxattrib->bdecrypted == true)
198                                         r8712_handle_tkip_mic_err(adapter,
199                                                 (u8)IS_MCAST(prxattrib->ra));
200                                 res = _FAIL;
201                         } else {
202                                 /* mic checked ok */
203                                 if ((psecuritypriv->bcheck_grpkey ==
204                                      false) && (IS_MCAST(prxattrib->ra) ==
205                                      true))
206                                         psecuritypriv->bcheck_grpkey = true;
207                         }
208                         recvframe_pull_tail(precvframe, 8);
209                 }
210         }
211         return res;
212 }
213
214 /* decrypt and set the ivlen,icvlen of the recv_frame */
215 union recv_frame *r8712_decryptor(struct _adapter *padapter,
216                             union recv_frame *precv_frame)
217 {
218         struct rx_pkt_attrib *prxattrib = &precv_frame->u.hdr.attrib;
219         struct security_priv *psecuritypriv = &padapter->securitypriv;
220         union recv_frame *return_packet = precv_frame;
221
222         if ((prxattrib->encrypt > 0) && ((prxattrib->bdecrypted == 0) ||
223            (psecuritypriv->sw_decrypt == true))) {
224                 psecuritypriv->hw_decrypted = false;
225                 switch (prxattrib->encrypt) {
226                 case _WEP40_:
227                 case _WEP104_:
228                         r8712_wep_decrypt(padapter, (u8 *)precv_frame);
229                         break;
230                 case _TKIP_:
231                         r8712_tkip_decrypt(padapter, (u8 *)precv_frame);
232                         break;
233                 case _AES_:
234                         r8712_aes_decrypt(padapter, (u8 *)precv_frame);
235                         break;
236                 default:
237                                 break;
238                 }
239         } else if (prxattrib->bdecrypted == 1)
240                 psecuritypriv->hw_decrypted = true;
241         return return_packet;
242 }
243 /*###set the security information in the recv_frame */
244 union recv_frame *r8712_portctrl(struct _adapter *adapter,
245                                  union recv_frame *precv_frame)
246 {
247         u8 *psta_addr, *ptr;
248         uint auth_alg;
249         struct recv_frame_hdr *pfhdr;
250         struct sta_info *psta;
251         struct  sta_priv *pstapriv;
252         union recv_frame *prtnframe;
253         u16 ether_type = 0;
254
255         pstapriv = &adapter->stapriv;
256         ptr = get_recvframe_data(precv_frame);
257         pfhdr = &precv_frame->u.hdr;
258         psta_addr = pfhdr->attrib.ta;
259         psta = r8712_get_stainfo(pstapriv, psta_addr);
260         auth_alg = adapter->securitypriv.AuthAlgrthm;
261         if (auth_alg == 2) {
262                 if ((psta != NULL) && (psta->ieee8021x_blocked)) {
263                         /* blocked
264                          * only accept EAPOL frame */
265                         prtnframe = precv_frame;
266                         /*get ether_type */
267                         ptr = ptr + pfhdr->attrib.hdrlen +
268                               pfhdr->attrib.iv_len + LLC_HEADER_SIZE;
269                         memcpy(&ether_type, ptr, 2);
270                         ether_type = ntohs((unsigned short)ether_type);
271                         if (ether_type == 0x888e)
272                                 prtnframe = precv_frame;
273                         else {
274                                 /*free this frame*/
275                                 r8712_free_recvframe(precv_frame,
276                                          &adapter->recvpriv.free_recv_queue);
277                                 prtnframe = NULL;
278                         }
279                 } else {
280                         /* allowed
281                          * check decryption status, and decrypt the
282                          * frame if needed */
283                         prtnframe = precv_frame;
284                         /* check is the EAPOL frame or not (Rekey) */
285                         if (ether_type == 0x888e) {
286                                 /* check Rekey */
287                                 prtnframe = precv_frame;
288                         }
289                 }
290         } else
291                 prtnframe = precv_frame;
292         return prtnframe;
293 }
294
295 static sint recv_decache(union recv_frame *precv_frame, u8 bretry,
296                   struct stainfo_rxcache *prxcache)
297 {
298         sint tid = precv_frame->u.hdr.attrib.priority;
299         u16 seq_ctrl = ((precv_frame->u.hdr.attrib.seq_num&0xffff) << 4) |
300                         (precv_frame->u.hdr.attrib.frag_num & 0xf);
301
302         if (tid > 15)
303                 return _FAIL;
304         if (seq_ctrl == prxcache->tid_rxseq[tid])
305                 return _FAIL;
306         prxcache->tid_rxseq[tid] = seq_ctrl;
307         return _SUCCESS;
308 }
309
310 static sint sta2sta_data_frame(struct _adapter *adapter, union recv_frame *precv_frame,
311                         struct sta_info **psta
312 )
313 {
314         u8 *ptr = precv_frame->u.hdr.rx_data;
315         sint ret = _SUCCESS;
316         struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
317         struct  sta_priv *pstapriv = &adapter->stapriv;
318         struct  mlme_priv *pmlmepriv = &adapter->mlmepriv;
319         u8 *mybssid  = get_bssid(pmlmepriv);
320         u8 *myhwaddr = myid(&adapter->eeprompriv);
321         u8 *sta_addr = NULL;
322         sint bmcast = IS_MCAST(pattrib->dst);
323
324         if ((check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) == true) ||
325             (check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE) == true)) {
326                 /* filter packets that SA is myself or multicast or broadcast */
327                 if (!memcmp(myhwaddr, pattrib->src, ETH_ALEN))
328                         return _FAIL;
329                 if ((memcmp(myhwaddr, pattrib->dst, ETH_ALEN)) && (!bmcast))
330                         return _FAIL;
331                 if (!memcmp(pattrib->bssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
332                     !memcmp(mybssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
333                     (memcmp(pattrib->bssid, mybssid, ETH_ALEN)))
334                         return _FAIL;
335                 sta_addr = pattrib->src;
336         } else if (check_fwstate(pmlmepriv, WIFI_STATION_STATE) == true) {
337                 /* For Station mode, sa and bssid should always be BSSID,
338                  * and DA is my mac-address */
339                 if (memcmp(pattrib->bssid, pattrib->src, ETH_ALEN))
340                         return _FAIL;
341                sta_addr = pattrib->bssid;
342          } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE) == true) {
343                 if (bmcast) {
344                         /* For AP mode, if DA == MCAST, then BSSID should
345                          * be also MCAST */
346                         if (!IS_MCAST(pattrib->bssid))
347                                 return _FAIL;
348                 } else { /* not mc-frame */
349                         /* For AP mode, if DA is non-MCAST, then it must be
350                          *  BSSID, and bssid == BSSID */
351                         if (memcmp(pattrib->bssid, pattrib->dst, ETH_ALEN))
352                                 return _FAIL;
353                         sta_addr = pattrib->src;
354                 }
355           } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE) == true) {
356                 memcpy(pattrib->dst, GetAddr1Ptr(ptr), ETH_ALEN);
357                 memcpy(pattrib->src, GetAddr2Ptr(ptr), ETH_ALEN);
358                 memcpy(pattrib->bssid, GetAddr3Ptr(ptr), ETH_ALEN);
359                 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
360                 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
361                 sta_addr = mybssid;
362           } else
363                 ret  = _FAIL;
364         if (bmcast)
365                 *psta = r8712_get_bcmc_stainfo(adapter);
366         else
367                 *psta = r8712_get_stainfo(pstapriv, sta_addr); /* get ap_info */
368         if (*psta == NULL) {
369                 if (check_fwstate(pmlmepriv, WIFI_MP_STATE) == true)
370                         adapter->mppriv.rx_pktloss++;
371                 return _FAIL;
372         }
373         return ret;
374 }
375
376 static sint ap2sta_data_frame(struct _adapter *adapter, union recv_frame *precv_frame,
377                        struct sta_info **psta)
378 {
379         u8 *ptr = precv_frame->u.hdr.rx_data;
380         struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
381         struct  sta_priv *pstapriv = &adapter->stapriv;
382         struct  mlme_priv *pmlmepriv = &adapter->mlmepriv;
383         u8 *mybssid  = get_bssid(pmlmepriv);
384         u8 *myhwaddr = myid(&adapter->eeprompriv);
385         sint bmcast = IS_MCAST(pattrib->dst);
386
387         if ((check_fwstate(pmlmepriv, WIFI_STATION_STATE) == true)
388              && (check_fwstate(pmlmepriv, _FW_LINKED) == true)) {
389                 /* if NULL-frame, drop packet */
390                 if ((GetFrameSubType(ptr)) == WIFI_DATA_NULL)
391                         return _FAIL;
392                 /* drop QoS-SubType Data, including QoS NULL,
393                  * excluding QoS-Data */
394                 if ((GetFrameSubType(ptr) & WIFI_QOS_DATA_TYPE) ==
395                      WIFI_QOS_DATA_TYPE) {
396                         if (GetFrameSubType(ptr) & (BIT(4) | BIT(5) | BIT(6)))
397                                 return _FAIL;
398                 }
399
400                 /* filter packets that SA is myself or multicast or broadcast */
401                if (!memcmp(myhwaddr, pattrib->src, ETH_ALEN))
402                         return _FAIL;
403
404                 /* da should be for me */
405                 if ((memcmp(myhwaddr, pattrib->dst, ETH_ALEN)) && (!bmcast))
406                         return _FAIL;
407                 /* check BSSID */
408                 if (!memcmp(pattrib->bssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
409                      !memcmp(mybssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
410                      (memcmp(pattrib->bssid, mybssid, ETH_ALEN)))
411                         return _FAIL;
412                 if (bmcast)
413                         *psta = r8712_get_bcmc_stainfo(adapter);
414                 else
415                        *psta = r8712_get_stainfo(pstapriv, pattrib->bssid);
416                 if (*psta == NULL)
417                         return _FAIL;
418         } else if ((check_fwstate(pmlmepriv, WIFI_MP_STATE) == true) &&
419                    (check_fwstate(pmlmepriv, _FW_LINKED) == true)) {
420                 memcpy(pattrib->dst, GetAddr1Ptr(ptr), ETH_ALEN);
421                 memcpy(pattrib->src, GetAddr2Ptr(ptr), ETH_ALEN);
422                 memcpy(pattrib->bssid, GetAddr3Ptr(ptr), ETH_ALEN);
423                 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
424                 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
425                 memcpy(pattrib->bssid,  mybssid, ETH_ALEN);
426                 *psta = r8712_get_stainfo(pstapriv, pattrib->bssid);
427                 if (*psta == NULL)
428                         return _FAIL;
429         } else
430                 return _FAIL;
431         return _SUCCESS;
432 }
433
434 static sint sta2ap_data_frame(struct _adapter *adapter, union recv_frame *precv_frame,
435                        struct sta_info **psta)
436 {
437         struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
438         struct  sta_priv *pstapriv = &adapter->stapriv;
439         struct  mlme_priv *pmlmepriv = &adapter->mlmepriv;
440         unsigned char *mybssid  = get_bssid(pmlmepriv);
441
442         if (check_fwstate(pmlmepriv, WIFI_AP_STATE) == true) {
443                 /* For AP mode, if DA is non-MCAST, then it must be BSSID,
444                  * and bssid == BSSID
445                  * For AP mode, RA=BSSID, TX=STA(SRC_ADDR), A3=DST_ADDR */
446                 if (memcmp(pattrib->bssid, mybssid, ETH_ALEN))
447                         return _FAIL;
448                 *psta = r8712_get_stainfo(pstapriv, pattrib->src);
449                 if (*psta == NULL)
450                         return _FAIL;
451         }
452         return _SUCCESS;
453 }
454
455 static sint validate_recv_ctrl_frame(struct _adapter *adapter,
456                               union recv_frame *precv_frame)
457 {
458         return _FAIL;
459 }
460
461 static sint validate_recv_mgnt_frame(struct _adapter *adapter,
462                               union recv_frame *precv_frame)
463 {
464         return _FAIL;
465 }
466
467
468 static sint validate_recv_data_frame(struct _adapter *adapter,
469                               union recv_frame *precv_frame)
470 {
471         int res;
472         u8 bretry;
473         u8 *psa, *pda, *pbssid;
474         struct sta_info *psta = NULL;
475         u8 *ptr = precv_frame->u.hdr.rx_data;
476         struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
477         struct security_priv *psecuritypriv = &adapter->securitypriv;
478
479         bretry = GetRetry(ptr);
480         pda = get_da(ptr);
481         psa = get_sa(ptr);
482         pbssid = get_hdr_bssid(ptr);
483         if (pbssid == NULL)
484                 return _FAIL;
485         memcpy(pattrib->dst, pda, ETH_ALEN);
486         memcpy(pattrib->src, psa, ETH_ALEN);
487         memcpy(pattrib->bssid, pbssid, ETH_ALEN);
488         switch (pattrib->to_fr_ds) {
489         case 0:
490                 memcpy(pattrib->ra, pda, ETH_ALEN);
491                 memcpy(pattrib->ta, psa, ETH_ALEN);
492                 res = sta2sta_data_frame(adapter, precv_frame, &psta);
493                 break;
494         case 1:
495                 memcpy(pattrib->ra, pda, ETH_ALEN);
496                 memcpy(pattrib->ta, pbssid, ETH_ALEN);
497                 res = ap2sta_data_frame(adapter, precv_frame, &psta);
498                 break;
499         case 2:
500                 memcpy(pattrib->ra, pbssid, ETH_ALEN);
501                 memcpy(pattrib->ta, psa, ETH_ALEN);
502                 res = sta2ap_data_frame(adapter, precv_frame, &psta);
503                 break;
504         case 3:
505                 memcpy(pattrib->ra, GetAddr1Ptr(ptr), ETH_ALEN);
506                 memcpy(pattrib->ta, GetAddr2Ptr(ptr), ETH_ALEN);
507                 return _FAIL;
508         default:
509                 return _FAIL;
510         }
511         if (res == _FAIL)
512                 return _FAIL;
513         if (psta == NULL)
514                 return _FAIL;
515         else
516                 precv_frame->u.hdr.psta = psta;
517         pattrib->amsdu = 0;
518         /* parsing QC field */
519         if (pattrib->qos == 1) {
520                 pattrib->priority = GetPriority((ptr + 24));
521                 pattrib->ack_policy = GetAckpolicy((ptr + 24));
522                 pattrib->amsdu = GetAMsdu((ptr + 24));
523                 pattrib->hdrlen = pattrib->to_fr_ds == 3 ? 32 : 26;
524         } else {
525                 pattrib->priority = 0;
526                 pattrib->hdrlen = (pattrib->to_fr_ds == 3) ? 30 : 24;
527         }
528
529         if (pattrib->order)/*HT-CTRL 11n*/
530                 pattrib->hdrlen += 4;
531         precv_frame->u.hdr.preorder_ctrl =
532                          &psta->recvreorder_ctrl[pattrib->priority];
533
534         /* decache, drop duplicate recv packets */
535         if (recv_decache(precv_frame, bretry, &psta->sta_recvpriv.rxcache) ==
536             _FAIL)
537                 return _FAIL;
538
539         if (pattrib->privacy) {
540                 GET_ENCRY_ALGO(psecuritypriv, psta, pattrib->encrypt,
541                                IS_MCAST(pattrib->ra));
542                 SET_ICE_IV_LEN(pattrib->iv_len, pattrib->icv_len,
543                                pattrib->encrypt);
544         } else {
545                 pattrib->encrypt = 0;
546                 pattrib->iv_len = pattrib->icv_len = 0;
547         }
548         return _SUCCESS;
549 }
550
551 sint r8712_validate_recv_frame(struct _adapter *adapter,
552                                union recv_frame *precv_frame)
553 {
554         /*shall check frame subtype, to / from ds, da, bssid */
555         /*then call check if rx seq/frag. duplicated.*/
556
557         u8 type;
558         u8 subtype;
559         sint retval = _SUCCESS;
560         struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
561
562         u8 *ptr = precv_frame->u.hdr.rx_data;
563         u8  ver = (unsigned char)(*ptr) & 0x3;
564
565         /*add version chk*/
566         if (ver != 0)
567                 return _FAIL;
568         type =  GetFrameType(ptr);
569         subtype = GetFrameSubType(ptr); /*bit(7)~bit(2)*/
570         pattrib->to_fr_ds = get_tofr_ds(ptr);
571         pattrib->frag_num = GetFragNum(ptr);
572         pattrib->seq_num = GetSequence(ptr);
573         pattrib->pw_save = GetPwrMgt(ptr);
574         pattrib->mfrag = GetMFrag(ptr);
575         pattrib->mdata = GetMData(ptr);
576         pattrib->privacy =  GetPrivacy(ptr);
577         pattrib->order = GetOrder(ptr);
578         switch (type) {
579         case WIFI_MGT_TYPE: /*mgnt*/
580                 retval = validate_recv_mgnt_frame(adapter, precv_frame);
581                 break;
582         case WIFI_CTRL_TYPE:/*ctrl*/
583                 retval = validate_recv_ctrl_frame(adapter, precv_frame);
584                 break;
585         case WIFI_DATA_TYPE: /*data*/
586                 pattrib->qos = (subtype & BIT(7)) ? 1 : 0;
587                 retval = validate_recv_data_frame(adapter, precv_frame);
588                 break;
589         default:
590                 return _FAIL;
591         }
592         return retval;
593 }
594
595 sint r8712_wlanhdr_to_ethhdr(union recv_frame *precvframe)
596 {
597         /*remove the wlanhdr and add the eth_hdr*/
598         sint    rmv_len;
599         u16     eth_type, len;
600         u8      bsnaphdr;
601         u8      *psnap_type;
602         struct ieee80211_snap_hdr *psnap;
603
604         sint ret = _SUCCESS;
605         struct _adapter *adapter = precvframe->u.hdr.adapter;
606         struct mlme_priv *pmlmepriv = &adapter->mlmepriv;
607
608         u8 *ptr = get_recvframe_data(precvframe); /*point to frame_ctrl field*/
609         struct rx_pkt_attrib *pattrib = &precvframe->u.hdr.attrib;
610
611         if (pattrib->encrypt)
612                 recvframe_pull_tail(precvframe, pattrib->icv_len);
613         psnap = (struct ieee80211_snap_hdr *)(ptr + pattrib->hdrlen +
614                  pattrib->iv_len);
615         psnap_type = ptr + pattrib->hdrlen + pattrib->iv_len + SNAP_SIZE;
616         /* convert hdr + possible LLC headers into Ethernet header */
617         if ((!memcmp(psnap, (void *)rfc1042_header, SNAP_SIZE) &&
618             (memcmp(psnap_type, (void *)SNAP_ETH_TYPE_IPX, 2)) &&
619             (memcmp(psnap_type, (void *)SNAP_ETH_TYPE_APPLETALK_AARP, 2))) ||
620              !memcmp(psnap, (void *)bridge_tunnel_header, SNAP_SIZE)) {
621                 /* remove RFC1042 or Bridge-Tunnel encapsulation and
622                  * replace EtherType */
623                 bsnaphdr = true;
624         } else {
625                 /* Leave Ethernet header part of hdr and full payload */
626                 bsnaphdr = false;
627         }
628         rmv_len = pattrib->hdrlen + pattrib->iv_len +
629                   (bsnaphdr ? SNAP_SIZE : 0);
630         len = precvframe->u.hdr.len - rmv_len;
631         if ((check_fwstate(pmlmepriv, WIFI_MP_STATE) == true)) {
632                 ptr += rmv_len;
633                 *ptr = 0x87;
634                 *(ptr+1) = 0x12;
635                 eth_type = 0x8712;
636                 /* append rx status for mp test packets */
637                 ptr = recvframe_pull(precvframe, (rmv_len -
638                       sizeof(struct ethhdr) + 2) - 24);
639                 memcpy(ptr, get_rxmem(precvframe), 24);
640                 ptr += 24;
641         } else
642                 ptr = recvframe_pull(precvframe, (rmv_len -
643                       sizeof(struct ethhdr) + (bsnaphdr ? 2 : 0)));
644
645         memcpy(ptr, pattrib->dst, ETH_ALEN);
646         memcpy(ptr+ETH_ALEN, pattrib->src, ETH_ALEN);
647         if (!bsnaphdr) {
648                 len = htons(len);
649                 memcpy(ptr + 12, &len, 2);
650         }
651         return ret;
652 }
653
654 s32 r8712_recv_entry(union recv_frame *precvframe)
655 {
656         struct _adapter *padapter;
657         struct recv_priv *precvpriv;
658         struct  mlme_priv *pmlmepriv;
659         struct recv_stat *prxstat;
660         struct dvobj_priv *pdev;
661         u8 *phead, *pdata, *ptail, *pend;
662
663         struct  __queue *pfree_recv_queue, *ppending_recv_queue;
664         s32 ret = _SUCCESS;
665         struct intf_hdl *pintfhdl;
666
667         padapter = precvframe->u.hdr.adapter;
668         pintfhdl = &padapter->pio_queue->intf;
669         pmlmepriv = &padapter->mlmepriv;
670         precvpriv = &(padapter->recvpriv);
671         pdev = &padapter->dvobjpriv;
672         pfree_recv_queue = &(precvpriv->free_recv_queue);
673         ppending_recv_queue = &(precvpriv->recv_pending_queue);
674         phead = precvframe->u.hdr.rx_head;
675         pdata = precvframe->u.hdr.rx_data;
676         ptail = precvframe->u.hdr.rx_tail;
677         pend = precvframe->u.hdr.rx_end;
678         prxstat = (struct recv_stat *)phead;
679
680         padapter->ledpriv.LedControlHandler(padapter, LED_CTL_RX);
681
682         ret = recv_func(padapter, precvframe);
683         if (ret == _FAIL)
684                 goto _recv_entry_drop;
685         precvpriv->rx_pkts++;
686         precvpriv->rx_bytes += (uint)(precvframe->u.hdr.rx_tail -
687                                 precvframe->u.hdr.rx_data);
688         return ret;
689 _recv_entry_drop:
690         precvpriv->rx_drop++;
691         padapter->mppriv.rx_pktloss = precvpriv->rx_drop;
692         return ret;
693 }