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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[linux-btrfs-devel.git] / drivers / staging / rtl8712 / rtl871x_recv.c
blob7069f06d9b5d62af8550a53b7f2dbf56180b8ef0
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/slab.h>
32 #include <linux/kmemleak.h>
33
34 #include "osdep_service.h"
35 #include "drv_types.h"
36 #include "recv_osdep.h"
37 #include "mlme_osdep.h"
38 #include "ip.h"
39 #include "if_ether.h"
40 #include "ethernet.h"
41 #include "usb_ops.h"
42 #include "wifi.h"
43
44 static const u8 SNAP_ETH_TYPE_IPX[2] = {0x81, 0x37};
45
46 /* Datagram Delivery Protocol */
47 static const u8 SNAP_ETH_TYPE_APPLETALK_AARP[2] = {0x80, 0xf3};
48
49 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
50 static const u8 bridge_tunnel_header[] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8};
51
52 /* Ethernet-II snap header (RFC1042 for most EtherTypes) */
53 static const u8 rfc1042_header[] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00};
54
55 void _r8712_init_sta_recv_priv(struct sta_recv_priv *psta_recvpriv)
56 {
57 memset((u8 *)psta_recvpriv, 0, sizeof(struct sta_recv_priv));
58 spin_lock_init(&psta_recvpriv->lock);
59 _init_queue(&psta_recvpriv->defrag_q);
60 }
61
62 sint _r8712_init_recv_priv(struct recv_priv *precvpriv,
63 struct _adapter *padapter)
64 {
65 sint i;
66 union recv_frame *precvframe;
67
68 memset((unsigned char *)precvpriv, 0, sizeof(struct recv_priv));
69 spin_lock_init(&precvpriv->lock);
70 _init_queue(&precvpriv->free_recv_queue);
71 _init_queue(&precvpriv->recv_pending_queue);
72 precvpriv->adapter = padapter;
73 precvpriv->free_recvframe_cnt = NR_RECVFRAME;
74 precvpriv->pallocated_frame_buf = _malloc(NR_RECVFRAME *
75 sizeof(union recv_frame) +
76 RXFRAME_ALIGN_SZ);
77 if (precvpriv->pallocated_frame_buf == NULL)
78 return _FAIL;
79 kmemleak_not_leak(precvpriv->pallocated_frame_buf);
80 memset(precvpriv->pallocated_frame_buf, 0, NR_RECVFRAME *
81 sizeof(union recv_frame) + RXFRAME_ALIGN_SZ);
82 precvpriv->precv_frame_buf = precvpriv->pallocated_frame_buf +
83 RXFRAME_ALIGN_SZ -
84 ((addr_t)(precvpriv->pallocated_frame_buf) &
85 (RXFRAME_ALIGN_SZ-1));
86 precvframe = (union recv_frame *)precvpriv->precv_frame_buf;
87 for (i = 0; i < NR_RECVFRAME; i++) {
88 _init_listhead(&(precvframe->u.list));
89 list_insert_tail(&(precvframe->u.list),
90 &(precvpriv->free_recv_queue.queue));
91 r8712_os_recv_resource_alloc(padapter, precvframe);
92 precvframe->u.hdr.adapter = padapter;
93 precvframe++;
94 }
95 precvpriv->rx_pending_cnt = 1;
96 sema_init(&precvpriv->allrxreturnevt, 0);
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 (_queue_empty(pfree_recv_queue) == true)
116 precvframe = NULL;
117 else {
118 phead = get_list_head(pfree_recv_queue);
119 plist = get_next(phead);
120 precvframe = LIST_CONTAINOR(plist, union recv_frame, u);
121 list_delete(&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 = get_list_head(pframequeue);
149 plist = get_next(phead);
150 while (end_of_queue_search(phead, plist) == false) {
151 precvframe = LIST_CONTAINOR(plist, union recv_frame, u);
152 plist = get_next(plist);
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 == false)
182 return _FAIL;
183 } else
184 mickey = &stainfo->tkiprxmickey.skey[0];
185 /*icv_len included the mic code*/
186 datalen = precvframe->u.hdr.len - prxattrib->hdrlen -
187 prxattrib->iv_len - prxattrib->icv_len - 8;
188 pframe = precvframe->u.hdr.rx_data;
189 payload = pframe + prxattrib->hdrlen +
190 prxattrib->iv_len;
191 seccalctkipmic(mickey, pframe, payload, datalen,
192 &miccode[0],
193 (unsigned char)prxattrib->priority);
194 pframemic = payload + datalen;
195 bmic_err = false;
196 for (i = 0; i < 8; i++) {
197 if (miccode[i] != *(pframemic + i))
198 bmic_err = true;
199 }
200 if (bmic_err == true) {
201 if (prxattrib->bdecrypted == true)
202 r8712_handle_tkip_mic_err(adapter,
203 (u8)IS_MCAST(prxattrib->ra));
204 res = _FAIL;
205 } else {
206 /* mic checked ok */
207 if ((psecuritypriv->bcheck_grpkey ==
208 false) && (IS_MCAST(prxattrib->ra) ==
209 true))
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 == true))) {
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 return return_packet;
246 }
247 /*###set the security information in the recv_frame */
248 union recv_frame *r8712_portctrl(struct _adapter *adapter,
249 union recv_frame *precv_frame)
250 {
251 u8 *psta_addr, *ptr;
252 uint auth_alg;
253 struct recv_frame_hdr *pfhdr;
254 struct sta_info *psta;
255 struct sta_priv *pstapriv;
256 union recv_frame *prtnframe;
257 u16 ether_type = 0;
258
259 pstapriv = &adapter->stapriv;
260 ptr = get_recvframe_data(precv_frame);
261 pfhdr = &precv_frame->u.hdr;
262 psta_addr = pfhdr->attrib.ta;
263 psta = r8712_get_stainfo(pstapriv, psta_addr);
264 auth_alg = adapter->securitypriv.AuthAlgrthm;
265 if (auth_alg == 2) {
266 if ((psta != NULL) && (psta->ieee8021x_blocked)) {
267 /* blocked
268 * only accept EAPOL frame */
269 prtnframe = precv_frame;
270 /*get ether_type */
271 ptr = ptr + pfhdr->attrib.hdrlen +
272 pfhdr->attrib.iv_len + LLC_HEADER_SIZE;
273 memcpy(&ether_type, ptr, 2);
274 ether_type = ntohs((unsigned short)ether_type);
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 return prtnframe;
297 }
298
299 static sint recv_decache(union recv_frame *precv_frame, u8 bretry,
300 struct stainfo_rxcache *prxcache)
301 {
302 sint tid = precv_frame->u.hdr.attrib.priority;
303 u16 seq_ctrl = ((precv_frame->u.hdr.attrib.seq_num&0xffff) << 4) |
304 (precv_frame->u.hdr.attrib.frag_num & 0xf);
305
306 if (tid > 15)
307 return _FAIL;
308 if (seq_ctrl == prxcache->tid_rxseq[tid])
309 return _FAIL;
310 prxcache->tid_rxseq[tid] = seq_ctrl;
311 return _SUCCESS;
312 }
313
314 static sint sta2sta_data_frame(struct _adapter *adapter,
315 union recv_frame *precv_frame,
316 struct sta_info **psta)
317 {
318 u8 *ptr = precv_frame->u.hdr.rx_data;
319 sint ret = _SUCCESS;
320 struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
321 struct sta_priv *pstapriv = &adapter->stapriv;
322 struct mlme_priv *pmlmepriv = &adapter->mlmepriv;
323 u8 *mybssid = get_bssid(pmlmepriv);
324 u8 *myhwaddr = myid(&adapter->eeprompriv);
325 u8 *sta_addr = NULL;
326 sint bmcast = IS_MCAST(pattrib->dst);
327
328 if ((check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) == true) ||
329 (check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE) == true)) {
330 /* filter packets that SA is myself or multicast or broadcast */
331 if (!memcmp(myhwaddr, pattrib->src, ETH_ALEN))
332 return _FAIL;
333 if ((memcmp(myhwaddr, pattrib->dst, ETH_ALEN)) && (!bmcast))
334 return _FAIL;
335 if (!memcmp(pattrib->bssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
336 !memcmp(mybssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
337 (memcmp(pattrib->bssid, mybssid, ETH_ALEN)))
338 return _FAIL;
339 sta_addr = pattrib->src;
340 } else if (check_fwstate(pmlmepriv, WIFI_STATION_STATE) == true) {
341 /* For Station mode, sa and bssid should always be BSSID,
342 * and DA is my mac-address */
343 if (memcmp(pattrib->bssid, pattrib->src, ETH_ALEN))
344 return _FAIL;
345 sta_addr = pattrib->bssid;
346 } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE) == true) {
347 if (bmcast) {
348 /* For AP mode, if DA == MCAST, then BSSID should
349 * be also MCAST */
350 if (!IS_MCAST(pattrib->bssid))
351 return _FAIL;
352 } else { /* not mc-frame */
353 /* For AP mode, if DA is non-MCAST, then it must be
354 * BSSID, and bssid == BSSID */
355 if (memcmp(pattrib->bssid, pattrib->dst, ETH_ALEN))
356 return _FAIL;
357 sta_addr = pattrib->src;
358 }
359 } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE) == true) {
360 memcpy(pattrib->dst, GetAddr1Ptr(ptr), ETH_ALEN);
361 memcpy(pattrib->src, GetAddr2Ptr(ptr), ETH_ALEN);
362 memcpy(pattrib->bssid, GetAddr3Ptr(ptr), ETH_ALEN);
363 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
364 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
365 sta_addr = mybssid;
366 } else
367 ret = _FAIL;
368 if (bmcast)
369 *psta = r8712_get_bcmc_stainfo(adapter);
370 else
371 *psta = r8712_get_stainfo(pstapriv, sta_addr); /* get ap_info */
372 if (*psta == NULL) {
373 if (check_fwstate(pmlmepriv, WIFI_MP_STATE) == true)
374 adapter->mppriv.rx_pktloss++;
375 return _FAIL;
376 }
377 return ret;
378 }
379
380 static sint ap2sta_data_frame(struct _adapter *adapter,
381 union recv_frame *precv_frame,
382 struct sta_info **psta)
383 {
384 u8 *ptr = precv_frame->u.hdr.rx_data;
385 struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
386 struct sta_priv *pstapriv = &adapter->stapriv;
387 struct mlme_priv *pmlmepriv = &adapter->mlmepriv;
388 u8 *mybssid = get_bssid(pmlmepriv);
389 u8 *myhwaddr = myid(&adapter->eeprompriv);
390 sint bmcast = IS_MCAST(pattrib->dst);
391
392 if ((check_fwstate(pmlmepriv, WIFI_STATION_STATE) == true)
393 && (check_fwstate(pmlmepriv, _FW_LINKED) == true)) {
394 /* if NULL-frame, drop packet */
395 if ((GetFrameSubType(ptr)) == WIFI_DATA_NULL)
396 return _FAIL;
397 /* drop QoS-SubType Data, including QoS NULL,
398 * excluding QoS-Data */
399 if ((GetFrameSubType(ptr) & WIFI_QOS_DATA_TYPE) ==
400 WIFI_QOS_DATA_TYPE) {
401 if (GetFrameSubType(ptr) & (BIT(4) | BIT(5) | BIT(6)))
402 return _FAIL;
403 }
404
405 /* filter packets that SA is myself or multicast or broadcast */
406 if (!memcmp(myhwaddr, pattrib->src, ETH_ALEN))
407 return _FAIL;
408
409 /* da should be for me */
410 if ((memcmp(myhwaddr, pattrib->dst, ETH_ALEN)) && (!bmcast))
411 return _FAIL;
412 /* check BSSID */
413 if (!memcmp(pattrib->bssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
414 !memcmp(mybssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
415 (memcmp(pattrib->bssid, mybssid, ETH_ALEN)))
416 return _FAIL;
417 if (bmcast)
418 *psta = r8712_get_bcmc_stainfo(adapter);
419 else
420 *psta = r8712_get_stainfo(pstapriv, pattrib->bssid);
421 if (*psta == NULL)
422 return _FAIL;
423 } else if ((check_fwstate(pmlmepriv, WIFI_MP_STATE) == true) &&
424 (check_fwstate(pmlmepriv, _FW_LINKED) == true)) {
425 memcpy(pattrib->dst, GetAddr1Ptr(ptr), ETH_ALEN);
426 memcpy(pattrib->src, GetAddr2Ptr(ptr), ETH_ALEN);
427 memcpy(pattrib->bssid, GetAddr3Ptr(ptr), ETH_ALEN);
428 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
429 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
430 memcpy(pattrib->bssid, mybssid, ETH_ALEN);
431 *psta = r8712_get_stainfo(pstapriv, pattrib->bssid);
432 if (*psta == NULL)
433 return _FAIL;
434 } else
435 return _FAIL;
436 return _SUCCESS;
437 }
438
439 static sint sta2ap_data_frame(struct _adapter *adapter,
440 union recv_frame *precv_frame,
441 struct sta_info **psta)
442 {
443 struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
444 struct sta_priv *pstapriv = &adapter->stapriv;
445 struct mlme_priv *pmlmepriv = &adapter->mlmepriv;
446 unsigned char *mybssid = get_bssid(pmlmepriv);
447
448 if (check_fwstate(pmlmepriv, WIFI_AP_STATE) == true) {
449 /* For AP mode, if DA is non-MCAST, then it must be BSSID,
450 * and bssid == BSSID
451 * For AP mode, RA=BSSID, TX=STA(SRC_ADDR), A3=DST_ADDR */
452 if (memcmp(pattrib->bssid, mybssid, ETH_ALEN))
453 return _FAIL;
454 *psta = r8712_get_stainfo(pstapriv, pattrib->src);
455 if (*psta == NULL)
456 return _FAIL;
457 }
458 return _SUCCESS;
459 }
460
461 static sint validate_recv_ctrl_frame(struct _adapter *adapter,
462 union recv_frame *precv_frame)
463 {
464 return _FAIL;
465 }
466
467 static sint validate_recv_mgnt_frame(struct _adapter *adapter,
468 union recv_frame *precv_frame)
469 {
470 return _FAIL;
471 }
472
473
474 static sint validate_recv_data_frame(struct _adapter *adapter,
475 union recv_frame *precv_frame)
476 {
477 int res;
478 u8 bretry;
479 u8 *psa, *pda, *pbssid;
480 struct sta_info *psta = NULL;
481 u8 *ptr = precv_frame->u.hdr.rx_data;
482 struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
483 struct security_priv *psecuritypriv = &adapter->securitypriv;
484
485 bretry = GetRetry(ptr);
486 pda = get_da(ptr);
487 psa = get_sa(ptr);
488 pbssid = get_hdr_bssid(ptr);
489 if (pbssid == NULL)
490 return _FAIL;
491 memcpy(pattrib->dst, pda, ETH_ALEN);
492 memcpy(pattrib->src, psa, ETH_ALEN);
493 memcpy(pattrib->bssid, pbssid, ETH_ALEN);
494 switch (pattrib->to_fr_ds) {
495 case 0:
496 memcpy(pattrib->ra, pda, ETH_ALEN);
497 memcpy(pattrib->ta, psa, ETH_ALEN);
498 res = sta2sta_data_frame(adapter, precv_frame, &psta);
499 break;
500 case 1:
501 memcpy(pattrib->ra, pda, ETH_ALEN);
502 memcpy(pattrib->ta, pbssid, ETH_ALEN);
503 res = ap2sta_data_frame(adapter, precv_frame, &psta);
504 break;
505 case 2:
506 memcpy(pattrib->ra, pbssid, ETH_ALEN);
507 memcpy(pattrib->ta, psa, ETH_ALEN);
508 res = sta2ap_data_frame(adapter, precv_frame, &psta);
509 break;
510 case 3:
511 memcpy(pattrib->ra, GetAddr1Ptr(ptr), ETH_ALEN);
512 memcpy(pattrib->ta, GetAddr2Ptr(ptr), ETH_ALEN);
513 return _FAIL;
514 default:
515 return _FAIL;
516 }
517 if (res == _FAIL)
518 return _FAIL;
519 if (psta == NULL)
520 return _FAIL;
521 else
522 precv_frame->u.hdr.psta = psta;
523 pattrib->amsdu = 0;
524 /* parsing QC field */
525 if (pattrib->qos == 1) {
526 pattrib->priority = GetPriority((ptr + 24));
527 pattrib->ack_policy = GetAckpolicy((ptr + 24));
528 pattrib->amsdu = GetAMsdu((ptr + 24));
529 pattrib->hdrlen = pattrib->to_fr_ds == 3 ? 32 : 26;
530 } else {
531 pattrib->priority = 0;
532 pattrib->hdrlen = (pattrib->to_fr_ds == 3) ? 30 : 24;
533 }
534
535 if (pattrib->order)/*HT-CTRL 11n*/
536 pattrib->hdrlen += 4;
537 precv_frame->u.hdr.preorder_ctrl =
538 &psta->recvreorder_ctrl[pattrib->priority];
539
540 /* decache, drop duplicate recv packets */
541 if (recv_decache(precv_frame, bretry, &psta->sta_recvpriv.rxcache) ==
542 _FAIL)
543 return _FAIL;
544
545 if (pattrib->privacy) {
546 GET_ENCRY_ALGO(psecuritypriv, psta, pattrib->encrypt,
547 IS_MCAST(pattrib->ra));
548 SET_ICE_IV_LEN(pattrib->iv_len, pattrib->icv_len,
549 pattrib->encrypt);
550 } else {
551 pattrib->encrypt = 0;
552 pattrib->iv_len = pattrib->icv_len = 0;
553 }
554 return _SUCCESS;
555 }
556
557 sint r8712_validate_recv_frame(struct _adapter *adapter,
558 union recv_frame *precv_frame)
559 {
560 /*shall check frame subtype, to / from ds, da, bssid */
561 /*then call check if rx seq/frag. duplicated.*/
562
563 u8 type;
564 u8 subtype;
565 sint retval = _SUCCESS;
566 struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib;
567
568 u8 *ptr = precv_frame->u.hdr.rx_data;
569 u8 ver = (unsigned char)(*ptr) & 0x3;
570
571 /*add version chk*/
572 if (ver != 0)
573 return _FAIL;
574 type = GetFrameType(ptr);
575 subtype = GetFrameSubType(ptr); /*bit(7)~bit(2)*/
576 pattrib->to_fr_ds = get_tofr_ds(ptr);
577 pattrib->frag_num = GetFragNum(ptr);
578 pattrib->seq_num = GetSequence(ptr);
579 pattrib->pw_save = GetPwrMgt(ptr);
580 pattrib->mfrag = GetMFrag(ptr);
581 pattrib->mdata = GetMData(ptr);
582 pattrib->privacy = GetPrivacy(ptr);
583 pattrib->order = GetOrder(ptr);
584 switch (type) {
585 case WIFI_MGT_TYPE: /*mgnt*/
586 retval = validate_recv_mgnt_frame(adapter, precv_frame);
587 break;
588 case WIFI_CTRL_TYPE:/*ctrl*/
589 retval = validate_recv_ctrl_frame(adapter, precv_frame);
590 break;
591 case WIFI_DATA_TYPE: /*data*/
592 pattrib->qos = (subtype & BIT(7)) ? 1 : 0;
593 retval = validate_recv_data_frame(adapter, precv_frame);
594 break;
595 default:
596 return _FAIL;
597 }
598 return retval;
599 }
600
601 sint r8712_wlanhdr_to_ethhdr(union recv_frame *precvframe)
602 {
603 /*remove the wlanhdr and add the eth_hdr*/
604 sint rmv_len;
605 u16 eth_type, len;
606 u8 bsnaphdr;
607 u8 *psnap_type;
608 struct ieee80211_snap_hdr *psnap;
609
610 sint ret = _SUCCESS;
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) == true)) {
638 ptr += rmv_len;
639 *ptr = 0x87;
640 *(ptr+1) = 0x12;
641 eth_type = 0x8712;
642 /* append rx status for mp test packets */
643 ptr = recvframe_pull(precvframe, (rmv_len -
644 sizeof(struct ethhdr) + 2) - 24);
645 memcpy(ptr, get_rxmem(precvframe), 24);
646 ptr += 24;
647 } else
648 ptr = recvframe_pull(precvframe, (rmv_len -
649 sizeof(struct ethhdr) + (bsnaphdr ? 2 : 0)));
650
651 memcpy(ptr, pattrib->dst, ETH_ALEN);
652 memcpy(ptr+ETH_ALEN, pattrib->src, ETH_ALEN);
653 if (!bsnaphdr) {
654 len = htons(len);
655 memcpy(ptr + 12, &len, 2);
656 }
657 return ret;
658 }
659
660 s32 r8712_recv_entry(union recv_frame *precvframe)
661 {
662 struct _adapter *padapter;
663 struct recv_priv *precvpriv;
664 struct mlme_priv *pmlmepriv;
665 struct recv_stat *prxstat;
666 struct dvobj_priv *pdev;
667 u8 *phead, *pdata, *ptail, *pend;
668
669 struct __queue *pfree_recv_queue, *ppending_recv_queue;
670 s32 ret = _SUCCESS;
671 struct intf_hdl *pintfhdl;
672
673 padapter = precvframe->u.hdr.adapter;
674 pintfhdl = &padapter->pio_queue->intf;
675 pmlmepriv = &padapter->mlmepriv;
676 precvpriv = &(padapter->recvpriv);
677 pdev = &padapter->dvobjpriv;
678 pfree_recv_queue = &(precvpriv->free_recv_queue);
679 ppending_recv_queue = &(precvpriv->recv_pending_queue);
680 phead = precvframe->u.hdr.rx_head;
681 pdata = precvframe->u.hdr.rx_data;
682 ptail = precvframe->u.hdr.rx_tail;
683 pend = precvframe->u.hdr.rx_end;
684 prxstat = (struct recv_stat *)phead;
685
686 padapter->ledpriv.LedControlHandler(padapter, LED_CTL_RX);
687
688 ret = recv_func(padapter, precvframe);
689 if (ret == _FAIL)
690 goto _recv_entry_drop;
691 precvpriv->rx_pkts++;
692 precvpriv->rx_bytes += (uint)(precvframe->u.hdr.rx_tail -
693 precvframe->u.hdr.rx_data);
694 return ret;
695 _recv_entry_drop:
696 precvpriv->rx_drop++;
697 padapter->mppriv.rx_pktloss = precvpriv->rx_drop;
698 return ret;
699 }
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