These changes are the raw update to linux-4.4.6-rt14. Kernel sources
[kvmfornfv.git] / kernel / 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 <linux/ip.h>
32 #include <linux/slab.h>
33 #include <linux/if_ether.h>
34 #include <linux/kmemleak.h>
35 #include <linux/etherdevice.h>
36
37 #include "osdep_service.h"
38 #include "drv_types.h"
39 #include "recv_osdep.h"
40 #include "mlme_osdep.h"
41 #include "ethernet.h"
42 #include "usb_ops.h"
43 #include "wifi.h"
44
45 static const u8 SNAP_ETH_TYPE_IPX[2] = {0x81, 0x37};
46
47 /* Datagram Delivery Protocol */
48 static const u8 SNAP_ETH_TYPE_APPLETALK_AARP[2] = {0x80, 0xf3};
49
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};
52
53 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
54 static const u8 rfc1042_header[] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00};
55
56 void _r8712_init_sta_recv_priv(struct sta_recv_priv *psta_recvpriv)
57 {
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);
61 }
62
63 sint _r8712_init_recv_priv(struct recv_priv *precvpriv,
64                            struct _adapter *padapter)
65 {
66         sint i;
67         union recv_frame *precvframe;
68
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,
77                                 GFP_ATOMIC);
78         if (precvpriv->pallocated_frame_buf == NULL)
79                 return _FAIL;
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 +
84                                     RXFRAME_ALIGN_SZ -
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;
94                 precvframe++;
95         }
96         precvpriv->rx_pending_cnt = 1;
97         return r8712_init_recv_priv(precvpriv, padapter);
98 }
99
100 void _r8712_free_recv_priv(struct recv_priv *precvpriv)
101 {
102         kfree(precvpriv->pallocated_frame_buf);
103         r8712_free_recv_priv(precvpriv);
104 }
105
106 union recv_frame *r8712_alloc_recvframe(struct  __queue *pfree_recv_queue)
107 {
108         unsigned long irqL;
109         union recv_frame  *precvframe;
110         struct list_head *plist, *phead;
111         struct _adapter *padapter;
112         struct recv_priv *precvpriv;
113
114         spin_lock_irqsave(&pfree_recv_queue->lock, irqL);
115         if (list_empty(&pfree_recv_queue->queue)) {
116                 precvframe = NULL;
117         } else {
118                 phead = &pfree_recv_queue->queue;
119                 plist = phead->next;
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--;
127                 }
128         }
129         spin_unlock_irqrestore(&pfree_recv_queue->lock, irqL);
130         return precvframe;
131 }
132
133 /*
134 caller : defrag; recvframe_chk_defrag in recv_thread  (passive)
135 pframequeue: defrag_queue : will be accessed in recv_thread  (passive)
136
137 using spin_lock to protect
138
139 */
140
141 void r8712_free_recvframe_queue(struct  __queue *pframequeue,
142                                 struct  __queue *pfree_recv_queue)
143 {
144         union   recv_frame *precvframe;
145         struct list_head *plist, *phead;
146
147         spin_lock(&pframequeue->lock);
148         phead = &pframequeue->queue;
149         plist = phead->next;
150         while (!end_of_queue_search(phead, plist)) {
151                 precvframe = LIST_CONTAINOR(plist, union recv_frame, u);
152                 plist = plist->next;
153                 r8712_free_recvframe(precvframe, pfree_recv_queue);
154         }
155         spin_unlock(&pframequeue->lock);
156 }
157
158 sint r8712_recvframe_chkmic(struct _adapter *adapter,
159                             union recv_frame *precvframe)
160 {
161         sint i, res = _SUCCESS;
162         u32     datalen;
163         u8 miccode[8];
164         u8 bmic_err = false;
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;
170
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 +
177                                      prxattrib->hdrlen;
178                                 idx = iv[3];
179                                 mickey = &psecuritypriv->XGrprxmickey[(((idx >>
180                                          6) & 0x3)) - 1].skey[0];
181                                 if (!psecuritypriv->binstallGrpkey)
182                                         return _FAIL;
183                         } else {
184                                 mickey = &stainfo->tkiprxmickey.skey[0];
185                         }
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 +
191                                   prxattrib->iv_len;
192                         seccalctkipmic(mickey, pframe, payload, datalen,
193                                        &miccode[0],
194                                        (unsigned char)prxattrib->priority);
195                         pframemic = payload + datalen;
196                         bmic_err = false;
197                         for (i = 0; i < 8; i++) {
198                                 if (miccode[i] != *(pframemic + i))
199                                         bmic_err = true;
200                         }
201                         if (bmic_err) {
202                                 if (prxattrib->bdecrypted)
203                                         r8712_handle_tkip_mic_err(adapter,
204                                                 (u8)IS_MCAST(prxattrib->ra));
205                                 res = _FAIL;
206                         } else {
207                                 /* mic checked ok */
208                                 if (!psecuritypriv->bcheck_grpkey &&
209                                     IS_MCAST(prxattrib->ra))
210                                         psecuritypriv->bcheck_grpkey = true;
211                         }
212                         recvframe_pull_tail(precvframe, 8);
213                 }
214         }
215         return res;
216 }
217
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)
221 {
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;
225
226         if ((prxattrib->encrypt > 0) && ((prxattrib->bdecrypted == 0) ||
227             psecuritypriv->sw_decrypt)) {
228                 psecuritypriv->hw_decrypted = false;
229                 switch (prxattrib->encrypt) {
230                 case _WEP40_:
231                 case _WEP104_:
232                         r8712_wep_decrypt(padapter, (u8 *)precv_frame);
233                         break;
234                 case _TKIP_:
235                         r8712_tkip_decrypt(padapter, (u8 *)precv_frame);
236                         break;
237                 case _AES_:
238                         r8712_aes_decrypt(padapter, (u8 *)precv_frame);
239                         break;
240                 default:
241                                 break;
242                 }
243         } else if (prxattrib->bdecrypted == 1) {
244                 psecuritypriv->hw_decrypted = true;
245         }
246         return return_packet;
247 }
248 /*###set the security information in the recv_frame */
249 union recv_frame *r8712_portctrl(struct _adapter *adapter,
250                                  union recv_frame *precv_frame)
251 {
252         u8 *psta_addr, *ptr;
253         uint auth_alg;
254         struct recv_frame_hdr *pfhdr;
255         struct sta_info *psta;
256         struct  sta_priv *pstapriv;
257         union recv_frame *prtnframe;
258         u16 ether_type;
259
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;
266         if (auth_alg == 2) {
267                 /* get ether_type */
268                 ptr = ptr + pfhdr->attrib.hdrlen + LLC_HEADER_SIZE;
269                 memcpy(&ether_type, ptr, 2);
270                 ether_type = ntohs((unsigned short)ether_type);
271
272                 if ((psta != NULL) && (psta->ieee8021x_blocked)) {
273                         /* blocked
274                          * only accept EAPOL frame */
275                         if (ether_type == 0x888e) {
276                                 prtnframe = precv_frame;
277                         } else {
278                                 /*free this frame*/
279                                 r8712_free_recvframe(precv_frame,
280                                          &adapter->recvpriv.free_recv_queue);
281                                 prtnframe = NULL;
282                         }
283                 } else {
284                         /* allowed
285                          * check decryption status, and decrypt the
286                          * frame if needed */
287                         prtnframe = precv_frame;
288                         /* check is the EAPOL frame or not (Rekey) */
289                         if (ether_type == 0x888e) {
290                                 /* check Rekey */
291                                 prtnframe = precv_frame;
292                         }
293                 }
294         } else {
295                 prtnframe = precv_frame;
296         }
297         return prtnframe;
298 }
299
300 static sint recv_decache(union recv_frame *precv_frame, u8 bretry,
301                   struct stainfo_rxcache *prxcache)
302 {
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);
306
307         if (tid > 15)
308                 return _FAIL;
309         if (seq_ctrl == prxcache->tid_rxseq[tid])
310                 return _FAIL;
311         prxcache->tid_rxseq[tid] = seq_ctrl;
312         return _SUCCESS;
313 }
314
315 static sint sta2sta_data_frame(struct _adapter *adapter,
316                                union recv_frame *precv_frame,
317                                struct sta_info **psta)
318 {
319         u8 *ptr = precv_frame->u.hdr.rx_data;
320         sint ret = _SUCCESS;
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);
326         u8 *sta_addr = NULL;
327         sint bmcast = IS_MCAST(pattrib->dst);
328
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))
333                         return _FAIL;
334                 if ((memcmp(myhwaddr, pattrib->dst, ETH_ALEN)) && (!bmcast))
335                         return _FAIL;
336                 if (is_zero_ether_addr(pattrib->bssid) ||
337                     is_zero_ether_addr(mybssid) ||
338                     (memcmp(pattrib->bssid, mybssid, ETH_ALEN)))
339                         return _FAIL;
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))
345                         return _FAIL;
346                sta_addr = pattrib->bssid;
347         } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
348                 if (bmcast) {
349                         /* For AP mode, if DA == MCAST, then BSSID should
350                          * be also MCAST */
351                         if (!IS_MCAST(pattrib->bssid))
352                                 return _FAIL;
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))
357                                 return _FAIL;
358                         sta_addr = pattrib->src;
359                 }
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);
366                 sta_addr = mybssid;
367         } else {
368                 ret  = _FAIL;
369         }
370         if (bmcast)
371                 *psta = r8712_get_bcmc_stainfo(adapter);
372         else
373                 *psta = r8712_get_stainfo(pstapriv, sta_addr); /* get ap_info */
374         if (*psta == NULL) {
375                 if (check_fwstate(pmlmepriv, WIFI_MP_STATE))
376                         adapter->mppriv.rx_pktloss++;
377                 return _FAIL;
378         }
379         return ret;
380 }
381
382 static sint ap2sta_data_frame(struct _adapter *adapter,
383                               union recv_frame *precv_frame,
384                               struct sta_info **psta)
385 {
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);
393
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)
398                         return _FAIL;
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)))
404                                 return _FAIL;
405                 }
406
407                 /* filter packets that SA is myself or multicast or broadcast */
408                if (!memcmp(myhwaddr, pattrib->src, ETH_ALEN))
409                         return _FAIL;
410
411                 /* da should be for me */
412                 if ((memcmp(myhwaddr, pattrib->dst, ETH_ALEN)) && (!bmcast))
413                         return _FAIL;
414                 /* check BSSID */
415                 if (is_zero_ether_addr(pattrib->bssid) ||
416                      is_zero_ether_addr(mybssid) ||
417                      (memcmp(pattrib->bssid, mybssid, ETH_ALEN)))
418                         return _FAIL;
419                 if (bmcast)
420                         *psta = r8712_get_bcmc_stainfo(adapter);
421                 else
422                        *psta = r8712_get_stainfo(pstapriv, pattrib->bssid);
423                 if (*psta == NULL)
424                         return _FAIL;
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);
434                 if (*psta == NULL)
435                         return _FAIL;
436         } else {
437                 return _FAIL;
438         }
439         return _SUCCESS;
440 }
441
442 static sint sta2ap_data_frame(struct _adapter *adapter,
443                               union recv_frame *precv_frame,
444                               struct sta_info **psta)
445 {
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);
450
451         if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
452                 /* For AP mode, if DA is non-MCAST, then it must be BSSID,
453                  * and bssid == BSSID
454                  * For AP mode, RA=BSSID, TX=STA(SRC_ADDR), A3=DST_ADDR */
455                 if (memcmp(pattrib->bssid, mybssid, ETH_ALEN))
456                         return _FAIL;
457                 *psta = r8712_get_stainfo(pstapriv, pattrib->src);
458                 if (*psta == NULL)
459                         return _FAIL;
460         }
461         return _SUCCESS;
462 }
463
464 static sint validate_recv_ctrl_frame(struct _adapter *adapter,
465                               union recv_frame *precv_frame)
466 {
467         return _FAIL;
468 }
469
470 static sint validate_recv_mgnt_frame(struct _adapter *adapter,
471                               union recv_frame *precv_frame)
472 {
473         return _FAIL;
474 }
475
476
477 static sint validate_recv_data_frame(struct _adapter *adapter,
478                               union recv_frame *precv_frame)
479 {
480         int res;
481         u8 bretry;
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;
487
488         bretry = GetRetry(ptr);
489         pda = get_da(ptr);
490         psa = get_sa(ptr);
491         pbssid = get_hdr_bssid(ptr);
492         if (pbssid == NULL)
493                 return _FAIL;
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) {
498         case 0:
499                 memcpy(pattrib->ra, pda, ETH_ALEN);
500                 memcpy(pattrib->ta, psa, ETH_ALEN);
501                 res = sta2sta_data_frame(adapter, precv_frame, &psta);
502                 break;
503         case 1:
504                 memcpy(pattrib->ra, pda, ETH_ALEN);
505                 memcpy(pattrib->ta, pbssid, ETH_ALEN);
506                 res = ap2sta_data_frame(adapter, precv_frame, &psta);
507                 break;
508         case 2:
509                 memcpy(pattrib->ra, pbssid, ETH_ALEN);
510                 memcpy(pattrib->ta, psa, ETH_ALEN);
511                 res = sta2ap_data_frame(adapter, precv_frame, &psta);
512                 break;
513         case 3:
514                 memcpy(pattrib->ra, GetAddr1Ptr(ptr), ETH_ALEN);
515                 memcpy(pattrib->ta, GetAddr2Ptr(ptr), ETH_ALEN);
516                 return _FAIL;
517         default:
518                 return _FAIL;
519         }
520         if (res == _FAIL)
521                 return _FAIL;
522         if (psta == NULL)
523                 return _FAIL;
524         precv_frame->u.hdr.psta = psta;
525         pattrib->amsdu = 0;
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;
532         } else {
533                 pattrib->priority = 0;
534                 pattrib->hdrlen = (pattrib->to_fr_ds == 3) ? 30 : 24;
535         }
536
537         if (pattrib->order)/*HT-CTRL 11n*/
538                 pattrib->hdrlen += 4;
539         precv_frame->u.hdr.preorder_ctrl =
540                          &psta->recvreorder_ctrl[pattrib->priority];
541
542         /* decache, drop duplicate recv packets */
543         if (recv_decache(precv_frame, bretry, &psta->sta_recvpriv.rxcache) ==
544             _FAIL)
545                 return _FAIL;
546
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,
551                                pattrib->encrypt);
552         } else {
553                 pattrib->encrypt = 0;
554                 pattrib->iv_len = pattrib->icv_len = 0;
555         }
556         return _SUCCESS;
557 }
558
559 sint r8712_validate_recv_frame(struct _adapter *adapter,
560                                union recv_frame *precv_frame)
561 {
562         /*shall check frame subtype, to / from ds, da, bssid */
563         /*then call check if rx seq/frag. duplicated.*/
564
565         u8 type;
566         u8 subtype;
567         sint retval = _SUCCESS;
568         struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
569
570         u8 *ptr = precv_frame->u.hdr.rx_data;
571         u8  ver = (unsigned char)(*ptr) & 0x3;
572
573         /*add version chk*/
574         if (ver != 0)
575                 return _FAIL;
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);
586         switch (type) {
587         case WIFI_MGT_TYPE: /*mgnt*/
588                 retval = validate_recv_mgnt_frame(adapter, precv_frame);
589                 break;
590         case WIFI_CTRL_TYPE:/*ctrl*/
591                 retval = validate_recv_ctrl_frame(adapter, precv_frame);
592                 break;
593         case WIFI_DATA_TYPE: /*data*/
594                 pattrib->qos = (subtype & BIT(7)) ? 1 : 0;
595                 retval = validate_recv_data_frame(adapter, precv_frame);
596                 break;
597         default:
598                 return _FAIL;
599         }
600         return retval;
601 }
602
603 sint r8712_wlanhdr_to_ethhdr(union recv_frame *precvframe)
604 {
605         /*remove the wlanhdr and add the eth_hdr*/
606         sint    rmv_len;
607         u16     len;
608         u8      bsnaphdr;
609         u8      *psnap_type;
610         struct ieee80211_snap_hdr *psnap;
611         struct _adapter *adapter = precvframe->u.hdr.adapter;
612         struct mlme_priv *pmlmepriv = &adapter->mlmepriv;
613
614         u8 *ptr = get_recvframe_data(precvframe); /*point to frame_ctrl field*/
615         struct rx_pkt_attrib *pattrib = &precvframe->u.hdr.attrib;
616
617         if (pattrib->encrypt)
618                 recvframe_pull_tail(precvframe, pattrib->icv_len);
619         psnap = (struct ieee80211_snap_hdr *)(ptr + pattrib->hdrlen +
620                  pattrib->iv_len);
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 */
629                 bsnaphdr = true;
630         } else {
631                 /* Leave Ethernet header part of hdr and full payload */
632                 bsnaphdr = false;
633         }
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)) {
638                 ptr += rmv_len;
639                 *ptr = 0x87;
640                 *(ptr + 1) = 0x12;
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);
645                 ptr += 24;
646         } else
647                 ptr = recvframe_pull(precvframe, (rmv_len -
648                       sizeof(struct ethhdr) + (bsnaphdr ? 2 : 0)));
649
650         memcpy(ptr, pattrib->dst, ETH_ALEN);
651         memcpy(ptr + ETH_ALEN, pattrib->src, ETH_ALEN);
652         if (!bsnaphdr) {
653                 len = htons(len);
654                 memcpy(ptr + 12, &len, 2);
655         }
656         return _SUCCESS;
657 }
658
659 s32 r8712_recv_entry(union recv_frame *precvframe)
660 {
661         struct _adapter *padapter;
662         struct recv_priv *precvpriv;
663
664         s32 ret = _SUCCESS;
665
666         padapter = precvframe->u.hdr.adapter;
667         precvpriv = &(padapter->recvpriv);
668
669         padapter->ledpriv.LedControlHandler(padapter, LED_CTL_RX);
670
671         ret = recv_func(padapter, precvframe);
672         if (ret == _FAIL)
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);
677         return ret;
678 _recv_entry_drop:
679         precvpriv->rx_drop++;
680         padapter->mppriv.rx_pktloss = precvpriv->rx_drop;
681         return ret;
682 }