1 /******************************************************************************
2 *
3 * Copyright(c) 2007 - 2012 Realtek Corporation. All rights reserved.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of version 2 of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
17 *
18 *
19 ******************************************************************************/
20 #define _RTW_RECV_C_
21
22 #include <osdep_service.h>
23 #include <drv_types.h>
24 #include <recv_osdep.h>
25 #include <mlme_osdep.h>
26 #include <wifi.h>
27 #include <linux/vmalloc.h>
28
29 #define ETHERNET_HEADER_SIZE 14 /* Ethernet Header Length */
30 #define LLC_HEADER_SIZE 6 /* LLC Header Length */
31
32 static u8 SNAP_ETH_TYPE_IPX[2] = {0x81, 0x37};
33 static u8 SNAP_ETH_TYPE_APPLETALK_AARP[2] = {0x80, 0xf3};
34
35 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
36 static u8 rtw_bridge_tunnel_header[] = {
37 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8
38 };
39
40 static u8 rtw_rfc1042_header[] = {
41 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00
42 };
43
44 void rtw_signal_stat_timer_hdl(unsigned long data);
45
_rtw_init_sta_recv_priv(struct sta_recv_priv * psta_recvpriv)46 void _rtw_init_sta_recv_priv(struct sta_recv_priv *psta_recvpriv)
47 {
48
49 memset((u8 *)psta_recvpriv, 0, sizeof(struct sta_recv_priv));
50
51 spin_lock_init(&psta_recvpriv->lock);
52
53 _rtw_init_queue(&psta_recvpriv->defrag_q);
54
55 }
56
_rtw_init_recv_priv(struct recv_priv * precvpriv,struct adapter * padapter)57 int _rtw_init_recv_priv(struct recv_priv *precvpriv, struct adapter *padapter)
58 {
59 int i;
60
61 struct recv_frame *precvframe;
62
63 int res = _SUCCESS;
64
65 _rtw_init_queue(&precvpriv->free_recv_queue);
66 _rtw_init_queue(&precvpriv->recv_pending_queue);
67 _rtw_init_queue(&precvpriv->uc_swdec_pending_queue);
68
69 precvpriv->adapter = padapter;
70
71 precvpriv->free_recvframe_cnt = NR_RECVFRAME;
72
73 precvpriv->pallocated_frame_buf = vzalloc(NR_RECVFRAME * sizeof(struct recv_frame) + RXFRAME_ALIGN_SZ);
74
75 if (precvpriv->pallocated_frame_buf == NULL) {
76 res = _FAIL;
77 goto exit;
78 }
79
80 precvpriv->precv_frame_buf = (u8 *)N_BYTE_ALIGMENT((size_t)(precvpriv->pallocated_frame_buf), RXFRAME_ALIGN_SZ);
81
82 precvframe = (struct recv_frame *)precvpriv->precv_frame_buf;
83
84 for (i = 0; i < NR_RECVFRAME; i++) {
85 INIT_LIST_HEAD(&(precvframe->list));
86
87 list_add_tail(&(precvframe->list),
88 &(precvpriv->free_recv_queue.queue));
89
90 res = rtw_os_recv_resource_alloc(padapter, precvframe);
91
92 precvframe->len = 0;
93
94 precvframe->adapter = padapter;
95 precvframe++;
96 }
97 precvpriv->rx_pending_cnt = 1;
98
99 res = rtw_hal_init_recv_priv(padapter);
100
101 setup_timer(&precvpriv->signal_stat_timer,
102 rtw_signal_stat_timer_hdl,
103 (unsigned long)padapter);
104
105 precvpriv->signal_stat_sampling_interval = 1000; /* ms */
106
107 rtw_set_signal_stat_timer(precvpriv);
108 exit:
109
110
111 return res;
112 }
113
_rtw_free_recv_priv(struct recv_priv * precvpriv)114 void _rtw_free_recv_priv(struct recv_priv *precvpriv)
115 {
116 struct adapter *padapter = precvpriv->adapter;
117
118
119 rtw_free_uc_swdec_pending_queue(padapter);
120
121 if (precvpriv->pallocated_frame_buf) {
122 vfree(precvpriv->pallocated_frame_buf);
123 }
124
125 rtw_hal_free_recv_priv(padapter);
126
127 }
128
_rtw_alloc_recvframe(struct __queue * pfree_recv_queue)129 struct recv_frame *_rtw_alloc_recvframe(struct __queue *pfree_recv_queue)
130 {
131 struct recv_frame *hdr;
132 struct list_head *plist, *phead;
133 struct adapter *padapter;
134 struct recv_priv *precvpriv;
135
136 if (list_empty(&pfree_recv_queue->queue)) {
137 hdr = NULL;
138 } else {
139 phead = get_list_head(pfree_recv_queue);
140
141 plist = phead->next;
142
143 hdr = container_of(plist, struct recv_frame, list);
144
145 list_del_init(&hdr->list);
146 padapter = hdr->adapter;
147 if (padapter != NULL) {
148 precvpriv = &padapter->recvpriv;
149 if (pfree_recv_queue == &precvpriv->free_recv_queue)
150 precvpriv->free_recvframe_cnt--;
151 }
152 }
153
154
155 return (struct recv_frame *)hdr;
156 }
157
rtw_alloc_recvframe(struct __queue * pfree_recv_queue)158 struct recv_frame *rtw_alloc_recvframe(struct __queue *pfree_recv_queue)
159 {
160 struct recv_frame *precvframe;
161
162 spin_lock_bh(&pfree_recv_queue->lock);
163
164 precvframe = _rtw_alloc_recvframe(pfree_recv_queue);
165
166 spin_unlock_bh(&pfree_recv_queue->lock);
167
168 return precvframe;
169 }
170
rtw_init_recvframe(struct recv_frame * precvframe,struct recv_priv * precvpriv)171 void rtw_init_recvframe(struct recv_frame *precvframe, struct recv_priv *precvpriv)
172 {
173 /* Perry: This can be removed */
174 INIT_LIST_HEAD(&precvframe->list);
175
176 precvframe->len = 0;
177 }
178
rtw_free_recvframe(struct recv_frame * precvframe,struct __queue * pfree_recv_queue)179 int rtw_free_recvframe(struct recv_frame *precvframe,
180 struct __queue *pfree_recv_queue)
181 {
182 struct adapter *padapter;
183 struct recv_priv *precvpriv;
184
185 if (!precvframe)
186 return _FAIL;
187 padapter = precvframe->adapter;
188 precvpriv = &padapter->recvpriv;
189 if (precvframe->pkt) {
190 dev_kfree_skb_any(precvframe->pkt);/* free skb by driver */
191 precvframe->pkt = NULL;
192 }
193
194 spin_lock_bh(&pfree_recv_queue->lock);
195
196 list_del_init(&(precvframe->list));
197
198 precvframe->len = 0;
199
200 list_add_tail(&(precvframe->list), get_list_head(pfree_recv_queue));
201
202 if (padapter != NULL) {
203 if (pfree_recv_queue == &precvpriv->free_recv_queue)
204 precvpriv->free_recvframe_cnt++;
205 }
206
207 spin_unlock_bh(&pfree_recv_queue->lock);
208
209
210 return _SUCCESS;
211 }
212
_rtw_enqueue_recvframe(struct recv_frame * precvframe,struct __queue * queue)213 int _rtw_enqueue_recvframe(struct recv_frame *precvframe, struct __queue *queue)
214 {
215 struct adapter *padapter = precvframe->adapter;
216 struct recv_priv *precvpriv = &padapter->recvpriv;
217
218
219 list_del_init(&(precvframe->list));
220 list_add_tail(&(precvframe->list), get_list_head(queue));
221
222 if (padapter != NULL) {
223 if (queue == &precvpriv->free_recv_queue)
224 precvpriv->free_recvframe_cnt++;
225 }
226
227
228 return _SUCCESS;
229 }
230
rtw_enqueue_recvframe(struct recv_frame * precvframe,struct __queue * queue)231 int rtw_enqueue_recvframe(struct recv_frame *precvframe, struct __queue *queue)
232 {
233 int ret;
234
235 spin_lock_bh(&queue->lock);
236 ret = _rtw_enqueue_recvframe(precvframe, queue);
237 spin_unlock_bh(&queue->lock);
238
239 return ret;
240 }
241
242 /*
243 caller : defrag ; recvframe_chk_defrag in recv_thread (passive)
244 pframequeue: defrag_queue : will be accessed in recv_thread (passive)
245
246 using spinlock to protect
247
248 */
249
rtw_free_recvframe_queue(struct __queue * pframequeue,struct __queue * pfree_recv_queue)250 void rtw_free_recvframe_queue(struct __queue *pframequeue, struct __queue *pfree_recv_queue)
251 {
252 struct recv_frame *hdr;
253 struct list_head *plist, *phead;
254
255 spin_lock(&pframequeue->lock);
256
257 phead = get_list_head(pframequeue);
258 plist = phead->next;
259
260 while (phead != plist) {
261 hdr = container_of(plist, struct recv_frame, list);
262
263 plist = plist->next;
264
265 rtw_free_recvframe((struct recv_frame *)hdr, pfree_recv_queue);
266 }
267
268 spin_unlock(&pframequeue->lock);
269
270 }
271
rtw_free_uc_swdec_pending_queue(struct adapter * adapter)272 u32 rtw_free_uc_swdec_pending_queue(struct adapter *adapter)
273 {
274 u32 cnt = 0;
275 struct recv_frame *pending_frame;
276 while ((pending_frame = rtw_alloc_recvframe(&adapter->recvpriv.uc_swdec_pending_queue))) {
277 rtw_free_recvframe(pending_frame, &adapter->recvpriv.free_recv_queue);
278 DBG_88E("%s: dequeue uc_swdec_pending_queue\n", __func__);
279 cnt++;
280 }
281
282 return cnt;
283 }
284
recvframe_chkmic(struct adapter * adapter,struct recv_frame * precvframe)285 static int recvframe_chkmic(struct adapter *adapter,
286 struct recv_frame *precvframe)
287 {
288 int i, res = _SUCCESS;
289 u32 datalen;
290 u8 miccode[8];
291 u8 bmic_err = false, brpt_micerror = true;
292 u8 *pframe, *payload, *pframemic;
293 u8 *mickey;
294 struct sta_info *stainfo;
295 struct rx_pkt_attrib *prxattrib = &precvframe->attrib;
296 struct security_priv *psecuritypriv = &adapter->securitypriv;
297
298 struct mlme_ext_priv *pmlmeext = &adapter->mlmeextpriv;
299 struct mlme_ext_info *pmlmeinfo = &(pmlmeext->mlmext_info);
300
301 stainfo = rtw_get_stainfo(&adapter->stapriv, &prxattrib->ta[0]);
302
303 if (prxattrib->encrypt == _TKIP_) {
304 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n recvframe_chkmic:prxattrib->encrypt==_TKIP_\n"));
305 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n recvframe_chkmic:da=0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x\n",
306 prxattrib->ra[0], prxattrib->ra[1], prxattrib->ra[2], prxattrib->ra[3], prxattrib->ra[4], prxattrib->ra[5]));
307
308 /* calculate mic code */
309 if (stainfo != NULL) {
310 if (IS_MCAST(prxattrib->ra)) {
311 if (!psecuritypriv) {
312 res = _FAIL;
313 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("\n recvframe_chkmic:didn't install group key!!!!!!!!!!\n"));
314 DBG_88E("\n recvframe_chkmic:didn't install group key!!!!!!!!!!\n");
315 goto exit;
316 }
317 mickey = &psecuritypriv->dot118021XGrprxmickey[prxattrib->key_index].skey[0];
318
319 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n recvframe_chkmic: bcmc key\n"));
320 } else {
321 mickey = &stainfo->dot11tkiprxmickey.skey[0];
322 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("\n recvframe_chkmic: unicast key\n"));
323 }
324
325 /* icv_len included the mic code */
326 datalen = precvframe->len-prxattrib->hdrlen -
327 prxattrib->iv_len-prxattrib->icv_len-8;
328 pframe = precvframe->rx_data;
329 payload = pframe+prxattrib->hdrlen+prxattrib->iv_len;
330
331 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n prxattrib->iv_len=%d prxattrib->icv_len=%d\n", prxattrib->iv_len, prxattrib->icv_len));
332 rtw_seccalctkipmic(mickey, pframe, payload, datalen, &miccode[0],
333 (unsigned char)prxattrib->priority); /* care the length of the data */
334
335 pframemic = payload+datalen;
336
337 bmic_err = false;
338
339 for (i = 0; i < 8; i++) {
340 if (miccode[i] != *(pframemic+i)) {
341 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
342 ("recvframe_chkmic:miccode[%d](%02x)!=*(pframemic+%d)(%02x) ",
343 i, miccode[i], i, *(pframemic+i)));
344 bmic_err = true;
345 }
346 }
347
348 if (bmic_err) {
349 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
350 ("\n *(pframemic-8)-*(pframemic-1)=0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x\n",
351 *(pframemic-8), *(pframemic-7), *(pframemic-6),
352 *(pframemic-5), *(pframemic-4), *(pframemic-3),
353 *(pframemic-2), *(pframemic-1)));
354 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
355 ("\n *(pframemic-16)-*(pframemic-9)=0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x\n",
356 *(pframemic-16), *(pframemic-15), *(pframemic-14),
357 *(pframemic-13), *(pframemic-12), *(pframemic-11),
358 *(pframemic-10), *(pframemic-9)));
359 {
360 uint i;
361 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
362 ("\n ======demp packet (len=%d)======\n",
363 precvframe->len));
364 for (i = 0; i < precvframe->len; i += 8) {
365 RT_TRACE(_module_rtl871x_recv_c_,
366 _drv_err_,
367 ("0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x",
368 *(precvframe->rx_data+i),
369 *(precvframe->rx_data+i+1),
370 *(precvframe->rx_data+i+2),
371 *(precvframe->rx_data+i+3),
372 *(precvframe->rx_data+i+4),
373 *(precvframe->rx_data+i+5),
374 *(precvframe->rx_data+i+6),
375 *(precvframe->rx_data+i+7)));
376 }
377 RT_TRACE(_module_rtl871x_recv_c_,
378 _drv_err_,
379 ("\n ====== demp packet end [len=%d]======\n",
380 precvframe->len));
381 RT_TRACE(_module_rtl871x_recv_c_,
382 _drv_err_,
383 ("\n hrdlen=%d,\n",
384 prxattrib->hdrlen));
385 }
386
387 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
388 ("ra=0x%.2x 0x%.2x 0x%.2x 0x%.2x 0x%.2x 0x%.2x psecuritypriv->binstallGrpkey=%d ",
389 prxattrib->ra[0], prxattrib->ra[1], prxattrib->ra[2],
390 prxattrib->ra[3], prxattrib->ra[4], prxattrib->ra[5], psecuritypriv->binstallGrpkey));
391
392 /* double check key_index for some timing issue , */
393 /* cannot compare with psecuritypriv->dot118021XGrpKeyid also cause timing issue */
394 if ((IS_MCAST(prxattrib->ra) == true) && (prxattrib->key_index != pmlmeinfo->key_index))
395 brpt_micerror = false;
396
397 if ((prxattrib->bdecrypted) && (brpt_micerror)) {
398 rtw_handle_tkip_mic_err(adapter, (u8)IS_MCAST(prxattrib->ra));
399 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" mic error :prxattrib->bdecrypted=%d ", prxattrib->bdecrypted));
400 DBG_88E(" mic error :prxattrib->bdecrypted=%d\n", prxattrib->bdecrypted);
401 } else {
402 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" mic error :prxattrib->bdecrypted=%d ", prxattrib->bdecrypted));
403 DBG_88E(" mic error :prxattrib->bdecrypted=%d\n", prxattrib->bdecrypted);
404 }
405 res = _FAIL;
406 } else {
407 /* mic checked ok */
408 if ((!psecuritypriv->bcheck_grpkey) && (IS_MCAST(prxattrib->ra))) {
409 psecuritypriv->bcheck_grpkey = true;
410 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("psecuritypriv->bcheck_grpkey = true"));
411 }
412 }
413 } else {
414 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("recvframe_chkmic: rtw_get_stainfo==NULL!!!\n"));
415 }
416
417 recvframe_pull_tail(precvframe, 8);
418 }
419
420 exit:
421
422
423 return res;
424 }
425
426 /* decrypt and set the ivlen, icvlen of the recv_frame */
decryptor(struct adapter * padapter,struct recv_frame * precv_frame)427 static struct recv_frame *decryptor(struct adapter *padapter,
428 struct recv_frame *precv_frame)
429 {
430 struct rx_pkt_attrib *prxattrib = &precv_frame->attrib;
431 struct security_priv *psecuritypriv = &padapter->securitypriv;
432 struct recv_frame *return_packet = precv_frame;
433 u32 res = _SUCCESS;
434
435 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("prxstat->decrypted=%x prxattrib->encrypt=0x%03x\n", prxattrib->bdecrypted, prxattrib->encrypt));
436
437 if (prxattrib->encrypt > 0) {
438 u8 *iv = precv_frame->rx_data+prxattrib->hdrlen;
439 prxattrib->key_index = (((iv[3])>>6)&0x3);
440
441 if (prxattrib->key_index > WEP_KEYS) {
442 DBG_88E("prxattrib->key_index(%d)>WEP_KEYS\n", prxattrib->key_index);
443
444 switch (prxattrib->encrypt) {
445 case _WEP40_:
446 case _WEP104_:
447 prxattrib->key_index = psecuritypriv->dot11PrivacyKeyIndex;
448 break;
449 case _TKIP_:
450 case _AES_:
451 default:
452 prxattrib->key_index = psecuritypriv->dot118021XGrpKeyid;
453 break;
454 }
455 }
456 }
457
458 if ((prxattrib->encrypt > 0) && ((prxattrib->bdecrypted == 0) || (psecuritypriv->sw_decrypt))) {
459 psecuritypriv->hw_decrypted = false;
460
461 switch (prxattrib->encrypt) {
462 case _WEP40_:
463 case _WEP104_:
464 rtw_wep_decrypt(padapter, (u8 *)precv_frame);
465 break;
466 case _TKIP_:
467 res = rtw_tkip_decrypt(padapter, (u8 *)precv_frame);
468 break;
469 case _AES_:
470 res = rtw_aes_decrypt(padapter, (u8 *)precv_frame);
471 break;
472 default:
473 break;
474 }
475 } else if (prxattrib->bdecrypted == 1 && prxattrib->encrypt > 0 &&
476 (psecuritypriv->busetkipkey == 1 || prxattrib->encrypt != _TKIP_))
477 psecuritypriv->hw_decrypted = true;
478
479 if (res == _FAIL) {
480 rtw_free_recvframe(return_packet, &padapter->recvpriv.free_recv_queue);
481 return_packet = NULL;
482 }
483
484
485 return return_packet;
486 }
487
488 /* set the security information in the recv_frame */
portctrl(struct adapter * adapter,struct recv_frame * precv_frame)489 static struct recv_frame *portctrl(struct adapter *adapter,
490 struct recv_frame *precv_frame)
491 {
492 u8 *psta_addr, *ptr;
493 uint auth_alg;
494 struct recv_frame *pfhdr;
495 struct sta_info *psta;
496 struct sta_priv *pstapriv;
497 struct recv_frame *prtnframe;
498 u16 ether_type;
499 u16 eapol_type = 0x888e;/* for Funia BD's WPA issue */
500 struct rx_pkt_attrib *pattrib;
501 __be16 be_tmp;
502
503
504 pstapriv = &adapter->stapriv;
505
506 auth_alg = adapter->securitypriv.dot11AuthAlgrthm;
507
508 ptr = precv_frame->rx_data;
509 pfhdr = precv_frame;
510 pattrib = &pfhdr->attrib;
511 psta_addr = pattrib->ta;
512 psta = rtw_get_stainfo(pstapriv, psta_addr);
513
514 prtnframe = NULL;
515
516 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########portctrl:adapter->securitypriv.dot11AuthAlgrthm=%d\n", adapter->securitypriv.dot11AuthAlgrthm));
517
518 if (auth_alg == 2) {
519 /* get ether_type */
520 ptr = ptr + pfhdr->attrib.hdrlen + LLC_HEADER_SIZE;
521 memcpy(&be_tmp, ptr, 2);
522 ether_type = ntohs(be_tmp);
523
524 if ((psta != NULL) && (psta->ieee8021x_blocked)) {
525 /* blocked */
526 /* only accept EAPOL frame */
527 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########portctrl:psta->ieee8021x_blocked==1\n"));
528
529 if (ether_type == eapol_type) {
530 prtnframe = precv_frame;
531 } else {
532 /* free this frame */
533 rtw_free_recvframe(precv_frame, &adapter->recvpriv.free_recv_queue);
534 prtnframe = NULL;
535 }
536 } else {
537 /* allowed */
538 /* check decryption status, and decrypt the frame if needed */
539 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########portctrl:psta->ieee8021x_blocked==0\n"));
540 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
541 ("portctrl:precv_frame->hdr.attrib.privacy=%x\n",
542 precv_frame->attrib.privacy));
543
544 if (pattrib->bdecrypted == 0)
545 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("portctrl:prxstat->decrypted=%x\n", pattrib->bdecrypted));
546
547 prtnframe = precv_frame;
548 /* check is the EAPOL frame or not (Rekey) */
549 if (ether_type == eapol_type) {
550 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("########portctrl:ether_type==0x888e\n"));
551 /* check Rekey */
552
553 prtnframe = precv_frame;
554 } else {
555 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########portctrl:ether_type=0x%04x\n", ether_type));
556 }
557 }
558 } else {
559 prtnframe = precv_frame;
560 }
561
562
563 return prtnframe;
564 }
565
recv_decache(struct recv_frame * precv_frame,u8 bretry,struct stainfo_rxcache * prxcache)566 static int recv_decache(struct recv_frame *precv_frame, u8 bretry,
567 struct stainfo_rxcache *prxcache)
568 {
569 int tid = precv_frame->attrib.priority;
570
571 u16 seq_ctrl = ((precv_frame->attrib.seq_num&0xffff) << 4) |
572 (precv_frame->attrib.frag_num & 0xf);
573
574
575 if (tid > 15) {
576 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("recv_decache, (tid>15)! seq_ctrl=0x%x, tid=0x%x\n", seq_ctrl, tid));
577
578 return _FAIL;
579 }
580
581 if (1) {/* if (bretry) */
582 if (seq_ctrl == prxcache->tid_rxseq[tid]) {
583 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("recv_decache, seq_ctrl=0x%x, tid=0x%x, tid_rxseq=0x%x\n", seq_ctrl, tid, prxcache->tid_rxseq[tid]));
584
585 return _FAIL;
586 }
587 }
588
589 prxcache->tid_rxseq[tid] = seq_ctrl;
590
591
592 return _SUCCESS;
593 }
594
process_pwrbit_data(struct adapter * padapter,struct recv_frame * precv_frame)595 static void process_pwrbit_data(struct adapter *padapter,
596 struct recv_frame *precv_frame)
597 {
598 #ifdef CONFIG_88EU_AP_MODE
599 unsigned char pwrbit;
600 u8 *ptr = precv_frame->rx_data;
601 struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
602 struct sta_priv *pstapriv = &padapter->stapriv;
603 struct sta_info *psta = NULL;
604
605 psta = rtw_get_stainfo(pstapriv, pattrib->src);
606
607 pwrbit = GetPwrMgt(ptr);
608
609 if (psta) {
610 if (pwrbit) {
611 if (!(psta->state & WIFI_SLEEP_STATE))
612 stop_sta_xmit(padapter, psta);
613 } else {
614 if (psta->state & WIFI_SLEEP_STATE)
615 wakeup_sta_to_xmit(padapter, psta);
616 }
617 }
618
619 #endif
620 }
621
process_wmmps_data(struct adapter * padapter,struct recv_frame * precv_frame)622 static void process_wmmps_data(struct adapter *padapter,
623 struct recv_frame *precv_frame)
624 {
625 #ifdef CONFIG_88EU_AP_MODE
626 struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
627 struct sta_priv *pstapriv = &padapter->stapriv;
628 struct sta_info *psta = NULL;
629
630 psta = rtw_get_stainfo(pstapriv, pattrib->src);
631
632 if (!psta)
633 return;
634
635 if (!psta->qos_option)
636 return;
637
638 if (!(psta->qos_info&0xf))
639 return;
640
641 if (psta->state&WIFI_SLEEP_STATE) {
642 u8 wmmps_ac = 0;
643
644 switch (pattrib->priority) {
645 case 1:
646 case 2:
647 wmmps_ac = psta->uapsd_bk&BIT(1);
648 break;
649 case 4:
650 case 5:
651 wmmps_ac = psta->uapsd_vi&BIT(1);
652 break;
653 case 6:
654 case 7:
655 wmmps_ac = psta->uapsd_vo&BIT(1);
656 break;
657 case 0:
658 case 3:
659 default:
660 wmmps_ac = psta->uapsd_be&BIT(1);
661 break;
662 }
663
664 if (wmmps_ac) {
665 if (psta->sleepq_ac_len > 0) {
666 /* process received triggered frame */
667 xmit_delivery_enabled_frames(padapter, psta);
668 } else {
669 /* issue one qos null frame with More data bit = 0 and the EOSP bit set (= 1) */
670 issue_qos_nulldata(padapter, psta->hwaddr, (u16)pattrib->priority, 0, 0);
671 }
672 }
673 }
674
675 #endif
676 }
677
count_rx_stats(struct adapter * padapter,struct recv_frame * prframe,struct sta_info * sta)678 static void count_rx_stats(struct adapter *padapter,
679 struct recv_frame *prframe,
680 struct sta_info *sta)
681 {
682 int sz;
683 struct sta_info *psta = NULL;
684 struct stainfo_stats *pstats = NULL;
685 struct rx_pkt_attrib *pattrib = &prframe->attrib;
686 struct recv_priv *precvpriv = &padapter->recvpriv;
687
688 sz = prframe->len;
689 precvpriv->rx_bytes += sz;
690
691 padapter->mlmepriv.LinkDetectInfo.NumRxOkInPeriod++;
692
693 if ((!MacAddr_isBcst(pattrib->dst)) && (!IS_MCAST(pattrib->dst)))
694 padapter->mlmepriv.LinkDetectInfo.NumRxUnicastOkInPeriod++;
695
696 if (sta)
697 psta = sta;
698 else
699 psta = prframe->psta;
700
701 if (psta) {
702 pstats = &psta->sta_stats;
703
704 pstats->rx_data_pkts++;
705 pstats->rx_bytes += sz;
706 }
707 }
708
709 int sta2sta_data_frame(
710 struct adapter *adapter,
711 struct recv_frame *precv_frame,
712 struct sta_info **psta
713 );
714
sta2sta_data_frame(struct adapter * adapter,struct recv_frame * precv_frame,struct sta_info ** psta)715 int sta2sta_data_frame(struct adapter *adapter, struct recv_frame *precv_frame,
716 struct sta_info **psta)
717 {
718 u8 *ptr = precv_frame->rx_data;
719 int ret = _SUCCESS;
720 struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
721 struct sta_priv *pstapriv = &adapter->stapriv;
722 struct mlme_priv *pmlmepriv = &adapter->mlmepriv;
723 u8 *mybssid = get_bssid(pmlmepriv);
724 u8 *myhwaddr = myid(&adapter->eeprompriv);
725 u8 *sta_addr = NULL;
726 int bmcast = IS_MCAST(pattrib->dst);
727
728
729 if ((check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) == true) ||
730 (check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE) == true)) {
731 /* filter packets that SA is myself or multicast or broadcast */
732 if (!memcmp(myhwaddr, pattrib->src, ETH_ALEN)) {
733 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" SA==myself\n"));
734 ret = _FAIL;
735 goto exit;
736 }
737
738 if ((memcmp(myhwaddr, pattrib->dst, ETH_ALEN)) && (!bmcast)) {
739 ret = _FAIL;
740 goto exit;
741 }
742
743 if (!memcmp(pattrib->bssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
744 !memcmp(mybssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
745 memcmp(pattrib->bssid, mybssid, ETH_ALEN)) {
746 ret = _FAIL;
747 goto exit;
748 }
749
750 sta_addr = pattrib->src;
751 } else if (check_fwstate(pmlmepriv, WIFI_STATION_STATE)) {
752 /* For Station mode, sa and bssid should always be BSSID, and DA is my mac-address */
753 if (memcmp(pattrib->bssid, pattrib->src, ETH_ALEN)) {
754 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("bssid!=TA under STATION_MODE; drop pkt\n"));
755 ret = _FAIL;
756 goto exit;
757 }
758 sta_addr = pattrib->bssid;
759 } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
760 if (bmcast) {
761 /* For AP mode, if DA == MCAST, then BSSID should be also MCAST */
762 if (!IS_MCAST(pattrib->bssid)) {
763 ret = _FAIL;
764 goto exit;
765 }
766 } else { /* not mc-frame */
767 /* For AP mode, if DA is non-MCAST, then it must be BSSID, and bssid == BSSID */
768 if (memcmp(pattrib->bssid, pattrib->dst, ETH_ALEN)) {
769 ret = _FAIL;
770 goto exit;
771 }
772
773 sta_addr = pattrib->src;
774 }
775 } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
776 memcpy(pattrib->dst, GetAddr1Ptr(ptr), ETH_ALEN);
777 memcpy(pattrib->src, GetAddr2Ptr(ptr), ETH_ALEN);
778 memcpy(pattrib->bssid, GetAddr3Ptr(ptr), ETH_ALEN);
779 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
780 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
781
782 sta_addr = mybssid;
783 } else {
784 ret = _FAIL;
785 }
786
787 if (bmcast)
788 *psta = rtw_get_bcmc_stainfo(adapter);
789 else
790 *psta = rtw_get_stainfo(pstapriv, sta_addr); /* get ap_info */
791
792 if (*psta == NULL) {
793 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("can't get psta under sta2sta_data_frame ; drop pkt\n"));
794 ret = _FAIL;
795 goto exit;
796 }
797
798 exit:
799 return ret;
800 }
801
ap2sta_data_frame(struct adapter * adapter,struct recv_frame * precv_frame,struct sta_info ** psta)802 static int ap2sta_data_frame(
803 struct adapter *adapter,
804 struct recv_frame *precv_frame,
805 struct sta_info **psta)
806 {
807 u8 *ptr = precv_frame->rx_data;
808 struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
809 int ret = _SUCCESS;
810 struct sta_priv *pstapriv = &adapter->stapriv;
811 struct mlme_priv *pmlmepriv = &adapter->mlmepriv;
812 u8 *mybssid = get_bssid(pmlmepriv);
813 u8 *myhwaddr = myid(&adapter->eeprompriv);
814 int bmcast = IS_MCAST(pattrib->dst);
815
816
817 if ((check_fwstate(pmlmepriv, WIFI_STATION_STATE) == true) &&
818 (check_fwstate(pmlmepriv, _FW_LINKED) == true ||
819 check_fwstate(pmlmepriv, _FW_UNDER_LINKING))) {
820 /* filter packets that SA is myself or multicast or broadcast */
821 if (!memcmp(myhwaddr, pattrib->src, ETH_ALEN)) {
822 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" SA==myself\n"));
823 ret = _FAIL;
824 goto exit;
825 }
826
827 /* da should be for me */
828 if ((memcmp(myhwaddr, pattrib->dst, ETH_ALEN)) && (!bmcast)) {
829 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
830 (" ap2sta_data_frame: compare DA fail; DA=%pM\n", (pattrib->dst)));
831 ret = _FAIL;
832 goto exit;
833 }
834
835 /* check BSSID */
836 if (!memcmp(pattrib->bssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
837 !memcmp(mybssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
838 (memcmp(pattrib->bssid, mybssid, ETH_ALEN))) {
839 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
840 (" ap2sta_data_frame: compare BSSID fail ; BSSID=%pM\n", (pattrib->bssid)));
841 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("mybssid=%pM\n", (mybssid)));
842
843 if (!bmcast) {
844 DBG_88E("issue_deauth to the nonassociated ap=%pM for the reason(7)\n", (pattrib->bssid));
845 issue_deauth(adapter, pattrib->bssid, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
846 }
847
848 ret = _FAIL;
849 goto exit;
850 }
851
852 if (bmcast)
853 *psta = rtw_get_bcmc_stainfo(adapter);
854 else
855 *psta = rtw_get_stainfo(pstapriv, pattrib->bssid); /* get ap_info */
856
857 if (*psta == NULL) {
858 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("ap2sta: can't get psta under STATION_MODE ; drop pkt\n"));
859 ret = _FAIL;
860 goto exit;
861 }
862
863 /* if ((GetFrameSubType(ptr) & WIFI_QOS_DATA_TYPE) == WIFI_QOS_DATA_TYPE) { */
864 /* */
865
866 if (GetFrameSubType(ptr) & BIT(6)) {
867 /* No data, will not indicate to upper layer, temporily count it here */
868 count_rx_stats(adapter, precv_frame, *psta);
869 ret = RTW_RX_HANDLED;
870 goto exit;
871 }
872 } else if ((check_fwstate(pmlmepriv, WIFI_MP_STATE) == true) &&
873 (check_fwstate(pmlmepriv, _FW_LINKED) == true)) {
874 memcpy(pattrib->dst, GetAddr1Ptr(ptr), ETH_ALEN);
875 memcpy(pattrib->src, GetAddr2Ptr(ptr), ETH_ALEN);
876 memcpy(pattrib->bssid, GetAddr3Ptr(ptr), ETH_ALEN);
877 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
878 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
879
880 /* */
881 memcpy(pattrib->bssid, mybssid, ETH_ALEN);
882
883 *psta = rtw_get_stainfo(pstapriv, pattrib->bssid); /* get sta_info */
884 if (*psta == NULL) {
885 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("can't get psta under MP_MODE ; drop pkt\n"));
886 ret = _FAIL;
887 goto exit;
888 }
889 } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
890 /* Special case */
891 ret = RTW_RX_HANDLED;
892 goto exit;
893 } else {
894 if (!memcmp(myhwaddr, pattrib->dst, ETH_ALEN) && (!bmcast)) {
895 *psta = rtw_get_stainfo(pstapriv, pattrib->bssid); /* get sta_info */
896 if (*psta == NULL) {
897 DBG_88E("issue_deauth to the ap =%pM for the reason(7)\n", (pattrib->bssid));
898
899 issue_deauth(adapter, pattrib->bssid, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
900 }
901 }
902
903 ret = _FAIL;
904 }
905
906 exit:
907
908
909 return ret;
910 }
911
sta2ap_data_frame(struct adapter * adapter,struct recv_frame * precv_frame,struct sta_info ** psta)912 static int sta2ap_data_frame(struct adapter *adapter,
913 struct recv_frame *precv_frame,
914 struct sta_info **psta)
915 {
916 struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
917 struct sta_priv *pstapriv = &adapter->stapriv;
918 struct mlme_priv *pmlmepriv = &adapter->mlmepriv;
919 u8 *ptr = precv_frame->rx_data;
920 unsigned char *mybssid = get_bssid(pmlmepriv);
921 int ret = _SUCCESS;
922
923
924 if (check_fwstate(pmlmepriv, WIFI_AP_STATE) == true) {
925 /* For AP mode, RA = BSSID, TX = STA(SRC_ADDR), A3 = DST_ADDR */
926 if (memcmp(pattrib->bssid, mybssid, ETH_ALEN)) {
927 ret = _FAIL;
928 goto exit;
929 }
930
931 *psta = rtw_get_stainfo(pstapriv, pattrib->src);
932 if (*psta == NULL) {
933 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("can't get psta under AP_MODE; drop pkt\n"));
934 DBG_88E("issue_deauth to sta=%pM for the reason(7)\n", (pattrib->src));
935
936 issue_deauth(adapter, pattrib->src, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
937
938 ret = RTW_RX_HANDLED;
939 goto exit;
940 }
941
942 process_pwrbit_data(adapter, precv_frame);
943
944 if ((GetFrameSubType(ptr) & WIFI_QOS_DATA_TYPE) == WIFI_QOS_DATA_TYPE) {
945 process_wmmps_data(adapter, precv_frame);
946 }
947
948 if (GetFrameSubType(ptr) & BIT(6)) {
949 /* No data, will not indicate to upper layer, temporily count it here */
950 count_rx_stats(adapter, precv_frame, *psta);
951 ret = RTW_RX_HANDLED;
952 goto exit;
953 }
954 } else {
955 u8 *myhwaddr = myid(&adapter->eeprompriv);
956 if (memcmp(pattrib->ra, myhwaddr, ETH_ALEN)) {
957 ret = RTW_RX_HANDLED;
958 goto exit;
959 }
960 DBG_88E("issue_deauth to sta=%pM for the reason(7)\n", (pattrib->src));
961 issue_deauth(adapter, pattrib->src, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
962 ret = RTW_RX_HANDLED;
963 goto exit;
964 }
965
966 exit:
967
968
969 return ret;
970 }
971
validate_recv_ctrl_frame(struct adapter * padapter,struct recv_frame * precv_frame)972 static int validate_recv_ctrl_frame(struct adapter *padapter,
973 struct recv_frame *precv_frame)
974 {
975 #ifdef CONFIG_88EU_AP_MODE
976 struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
977 struct sta_priv *pstapriv = &padapter->stapriv;
978 u8 *pframe = precv_frame->rx_data;
979
980 if (GetFrameType(pframe) != WIFI_CTRL_TYPE)
981 return _FAIL;
982
983 /* receive the frames that ra(a1) is my address */
984 if (memcmp(GetAddr1Ptr(pframe), myid(&padapter->eeprompriv), ETH_ALEN))
985 return _FAIL;
986
987 /* only handle ps-poll */
988 if (GetFrameSubType(pframe) == WIFI_PSPOLL) {
989 u16 aid;
990 u8 wmmps_ac = 0;
991 struct sta_info *psta = NULL;
992
993 aid = GetAid(pframe);
994 psta = rtw_get_stainfo(pstapriv, GetAddr2Ptr(pframe));
995
996 if ((psta == NULL) || (psta->aid != aid))
997 return _FAIL;
998
999 /* for rx pkt statistics */
1000 psta->sta_stats.rx_ctrl_pkts++;
1001
1002 switch (pattrib->priority) {
1003 case 1:
1004 case 2:
1005 wmmps_ac = psta->uapsd_bk&BIT(0);
1006 break;
1007 case 4:
1008 case 5:
1009 wmmps_ac = psta->uapsd_vi&BIT(0);
1010 break;
1011 case 6:
1012 case 7:
1013 wmmps_ac = psta->uapsd_vo&BIT(0);
1014 break;
1015 case 0:
1016 case 3:
1017 default:
1018 wmmps_ac = psta->uapsd_be&BIT(0);
1019 break;
1020 }
1021
1022 if (wmmps_ac)
1023 return _FAIL;
1024
1025 if (psta->state & WIFI_STA_ALIVE_CHK_STATE) {
1026 DBG_88E("%s alive check-rx ps-poll\n", __func__);
1027 psta->expire_to = pstapriv->expire_to;
1028 psta->state ^= WIFI_STA_ALIVE_CHK_STATE;
1029 }
1030
1031 if ((psta->state&WIFI_SLEEP_STATE) && (pstapriv->sta_dz_bitmap&BIT(psta->aid))) {
1032 struct list_head *xmitframe_plist, *xmitframe_phead;
1033 struct xmit_frame *pxmitframe = NULL;
1034
1035 spin_lock_bh(&psta->sleep_q.lock);
1036
1037 xmitframe_phead = get_list_head(&psta->sleep_q);
1038 xmitframe_plist = xmitframe_phead->next;
1039
1040 if (xmitframe_phead != xmitframe_plist) {
1041 pxmitframe = container_of(xmitframe_plist, struct xmit_frame, list);
1042
1043 xmitframe_plist = xmitframe_plist->next;
1044
1045 list_del_init(&pxmitframe->list);
1046
1047 psta->sleepq_len--;
1048
1049 if (psta->sleepq_len > 0)
1050 pxmitframe->attrib.mdata = 1;
1051 else
1052 pxmitframe->attrib.mdata = 0;
1053
1054 pxmitframe->attrib.triggered = 1;
1055
1056 spin_unlock_bh(&psta->sleep_q.lock);
1057 if (rtw_hal_xmit(padapter, pxmitframe) == true)
1058 rtw_os_xmit_complete(padapter, pxmitframe);
1059 spin_lock_bh(&psta->sleep_q.lock);
1060
1061 if (psta->sleepq_len == 0) {
1062 pstapriv->tim_bitmap &= ~BIT(psta->aid);
1063
1064 /* update BCN for TIM IE */
1065 /* update_BCNTIM(padapter); */
1066 update_beacon(padapter, _TIM_IE_, NULL, false);
1067 }
1068 } else {
1069 if (pstapriv->tim_bitmap&BIT(psta->aid)) {
1070 if (psta->sleepq_len == 0) {
1071 DBG_88E("no buffered packets to xmit\n");
1072
1073 /* issue nulldata with More data bit = 0 to indicate we have no buffered packets */
1074 issue_nulldata(padapter, psta->hwaddr, 0, 0, 0);
1075 } else {
1076 DBG_88E("error!psta->sleepq_len=%d\n", psta->sleepq_len);
1077 psta->sleepq_len = 0;
1078 }
1079
1080 pstapriv->tim_bitmap &= ~BIT(psta->aid);
1081
1082 /* update BCN for TIM IE */
1083 /* update_BCNTIM(padapter); */
1084 update_beacon(padapter, _TIM_IE_, NULL, false);
1085 }
1086 }
1087
1088 spin_unlock_bh(&psta->sleep_q.lock);
1089 }
1090 }
1091
1092 #endif
1093
1094 return _FAIL;
1095 }
1096
1097 struct recv_frame *recvframe_chk_defrag(struct adapter *padapter,
1098 struct recv_frame *precv_frame);
1099
validate_recv_mgnt_frame(struct adapter * padapter,struct recv_frame * precv_frame)1100 static int validate_recv_mgnt_frame(struct adapter *padapter,
1101 struct recv_frame *precv_frame)
1102 {
1103 struct sta_info *psta;
1104
1105 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("+validate_recv_mgnt_frame\n"));
1106
1107 precv_frame = recvframe_chk_defrag(padapter, precv_frame);
1108 if (precv_frame == NULL) {
1109 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("%s: fragment packet\n", __func__));
1110 return _SUCCESS;
1111 }
1112
1113 /* for rx pkt statistics */
1114 psta = rtw_get_stainfo(&padapter->stapriv,
1115 GetAddr2Ptr(precv_frame->rx_data));
1116 if (psta) {
1117 psta->sta_stats.rx_mgnt_pkts++;
1118 if (GetFrameSubType(precv_frame->rx_data) == WIFI_BEACON) {
1119 psta->sta_stats.rx_beacon_pkts++;
1120 } else if (GetFrameSubType(precv_frame->rx_data) == WIFI_PROBEREQ) {
1121 psta->sta_stats.rx_probereq_pkts++;
1122 } else if (GetFrameSubType(precv_frame->rx_data) == WIFI_PROBERSP) {
1123 if (!memcmp(padapter->eeprompriv.mac_addr,
1124 GetAddr1Ptr(precv_frame->rx_data), ETH_ALEN))
1125 psta->sta_stats.rx_probersp_pkts++;
1126 else if (is_broadcast_mac_addr(GetAddr1Ptr(precv_frame->rx_data)) ||
1127 is_multicast_mac_addr(GetAddr1Ptr(precv_frame->rx_data)))
1128 psta->sta_stats.rx_probersp_bm_pkts++;
1129 else
1130 psta->sta_stats.rx_probersp_uo_pkts++;
1131 }
1132 }
1133
1134 mgt_dispatcher(padapter, precv_frame);
1135
1136 return _SUCCESS;
1137 }
1138
validate_recv_data_frame(struct adapter * adapter,struct recv_frame * precv_frame)1139 static int validate_recv_data_frame(struct adapter *adapter,
1140 struct recv_frame *precv_frame)
1141 {
1142 u8 bretry;
1143 u8 *psa, *pda, *pbssid;
1144 struct sta_info *psta = NULL;
1145 u8 *ptr = precv_frame->rx_data;
1146 struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
1147 struct security_priv *psecuritypriv = &adapter->securitypriv;
1148 int ret = _SUCCESS;
1149
1150
1151 bretry = GetRetry(ptr);
1152 pda = get_da(ptr);
1153 psa = get_sa(ptr);
1154 pbssid = get_hdr_bssid(ptr);
1155
1156 if (pbssid == NULL) {
1157 ret = _FAIL;
1158 goto exit;
1159 }
1160
1161 memcpy(pattrib->dst, pda, ETH_ALEN);
1162 memcpy(pattrib->src, psa, ETH_ALEN);
1163
1164 memcpy(pattrib->bssid, pbssid, ETH_ALEN);
1165
1166 switch (pattrib->to_fr_ds) {
1167 case 0:
1168 memcpy(pattrib->ra, pda, ETH_ALEN);
1169 memcpy(pattrib->ta, psa, ETH_ALEN);
1170 ret = sta2sta_data_frame(adapter, precv_frame, &psta);
1171 break;
1172 case 1:
1173 memcpy(pattrib->ra, pda, ETH_ALEN);
1174 memcpy(pattrib->ta, pbssid, ETH_ALEN);
1175 ret = ap2sta_data_frame(adapter, precv_frame, &psta);
1176 break;
1177 case 2:
1178 memcpy(pattrib->ra, pbssid, ETH_ALEN);
1179 memcpy(pattrib->ta, psa, ETH_ALEN);
1180 ret = sta2ap_data_frame(adapter, precv_frame, &psta);
1181 break;
1182 case 3:
1183 memcpy(pattrib->ra, GetAddr1Ptr(ptr), ETH_ALEN);
1184 memcpy(pattrib->ta, GetAddr2Ptr(ptr), ETH_ALEN);
1185 ret = _FAIL;
1186 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" case 3\n"));
1187 break;
1188 default:
1189 ret = _FAIL;
1190 break;
1191 }
1192
1193 if (ret == _FAIL) {
1194 goto exit;
1195 } else if (ret == RTW_RX_HANDLED) {
1196 goto exit;
1197 }
1198
1199 if (psta == NULL) {
1200 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" after to_fr_ds_chk; psta==NULL\n"));
1201 ret = _FAIL;
1202 goto exit;
1203 }
1204
1205 /* psta->rssi = prxcmd->rssi; */
1206 /* psta->signal_quality = prxcmd->sq; */
1207 precv_frame->psta = psta;
1208
1209 pattrib->amsdu = 0;
1210 pattrib->ack_policy = 0;
1211 /* parsing QC field */
1212 if (pattrib->qos == 1) {
1213 pattrib->priority = GetPriority((ptr + 24));
1214 pattrib->ack_policy = GetAckpolicy((ptr + 24));
1215 pattrib->amsdu = GetAMsdu((ptr + 24));
1216 pattrib->hdrlen = pattrib->to_fr_ds == 3 ? 32 : 26;
1217
1218 if (pattrib->priority != 0 && pattrib->priority != 3)
1219 adapter->recvpriv.bIsAnyNonBEPkts = true;
1220 } else {
1221 pattrib->priority = 0;
1222 pattrib->hdrlen = pattrib->to_fr_ds == 3 ? 30 : 24;
1223 }
1224
1225 if (pattrib->order)/* HT-CTRL 11n */
1226 pattrib->hdrlen += 4;
1227
1228 precv_frame->preorder_ctrl = &psta->recvreorder_ctrl[pattrib->priority];
1229
1230 /* decache, drop duplicate recv packets */
1231 if (recv_decache(precv_frame, bretry, &psta->sta_recvpriv.rxcache) == _FAIL) {
1232 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("decache : drop pkt\n"));
1233 ret = _FAIL;
1234 goto exit;
1235 }
1236
1237 if (pattrib->privacy) {
1238 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("validate_recv_data_frame:pattrib->privacy=%x\n", pattrib->privacy));
1239 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n ^^^^^^^^^^^IS_MCAST(pattrib->ra(0x%02x))=%d^^^^^^^^^^^^^^^6\n", pattrib->ra[0], IS_MCAST(pattrib->ra)));
1240
1241 GET_ENCRY_ALGO(psecuritypriv, psta, pattrib->encrypt, IS_MCAST(pattrib->ra));
1242
1243 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n pattrib->encrypt=%d\n", pattrib->encrypt));
1244
1245 SET_ICE_IV_LEN(pattrib->iv_len, pattrib->icv_len, pattrib->encrypt);
1246 } else {
1247 pattrib->encrypt = 0;
1248 pattrib->iv_len = 0;
1249 pattrib->icv_len = 0;
1250 }
1251
1252 exit:
1253
1254
1255 return ret;
1256 }
1257
validate_recv_frame(struct adapter * adapter,struct recv_frame * precv_frame)1258 static int validate_recv_frame(struct adapter *adapter,
1259 struct recv_frame *precv_frame)
1260 {
1261 /* shall check frame subtype, to / from ds, da, bssid */
1262
1263 /* then call check if rx seq/frag. duplicated. */
1264
1265 u8 type;
1266 u8 subtype;
1267 int retval = _SUCCESS;
1268 u8 bDumpRxPkt;
1269 struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
1270 u8 *ptr = precv_frame->rx_data;
1271 u8 ver = (unsigned char)(*ptr)&0x3;
1272 struct mlme_ext_priv *pmlmeext = &adapter->mlmeextpriv;
1273
1274
1275 if (pmlmeext->sitesurvey_res.state == SCAN_PROCESS) {
1276 int ch_set_idx = rtw_ch_set_search_ch(pmlmeext->channel_set, rtw_get_oper_ch(adapter));
1277 if (ch_set_idx >= 0)
1278 pmlmeext->channel_set[ch_set_idx].rx_count++;
1279 }
1280
1281 /* add version chk */
1282 if (ver != 0) {
1283 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("validate_recv_data_frame fail! (ver!=0)\n"));
1284 retval = _FAIL;
1285 goto exit;
1286 }
1287
1288 type = GetFrameType(ptr);
1289 subtype = GetFrameSubType(ptr); /* bit(7)~bit(2) */
1290
1291 pattrib->to_fr_ds = get_tofr_ds(ptr);
1292
1293 pattrib->frag_num = GetFragNum(ptr);
1294 pattrib->seq_num = GetSequence(ptr);
1295
1296 pattrib->pw_save = GetPwrMgt(ptr);
1297 pattrib->mfrag = GetMFrag(ptr);
1298 pattrib->mdata = GetMData(ptr);
1299 pattrib->privacy = GetPrivacy(ptr);
1300 pattrib->order = GetOrder(ptr);
1301
1302 /* Dump rx packets */
1303 rtw_hal_get_def_var(adapter, HAL_DEF_DBG_DUMP_RXPKT, &(bDumpRxPkt));
1304 if (bDumpRxPkt == 1) {/* dump all rx packets */
1305 int i;
1306 DBG_88E("#############################\n");
1307
1308 for (i = 0; i < 64; i = i+8)
1309 DBG_88E("%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:\n", *(ptr+i),
1310 *(ptr+i+1), *(ptr+i+2), *(ptr+i+3), *(ptr+i+4), *(ptr+i+5), *(ptr+i+6), *(ptr+i+7));
1311 DBG_88E("#############################\n");
1312 } else if (bDumpRxPkt == 2) {
1313 if (type == WIFI_MGT_TYPE) {
1314 int i;
1315 DBG_88E("#############################\n");
1316
1317 for (i = 0; i < 64; i = i+8)
1318 DBG_88E("%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:\n", *(ptr+i),
1319 *(ptr+i+1), *(ptr+i+2), *(ptr+i+3), *(ptr+i+4), *(ptr+i+5), *(ptr+i+6), *(ptr+i+7));
1320 DBG_88E("#############################\n");
1321 }
1322 } else if (bDumpRxPkt == 3) {
1323 if (type == WIFI_DATA_TYPE) {
1324 int i;
1325 DBG_88E("#############################\n");
1326
1327 for (i = 0; i < 64; i = i+8)
1328 DBG_88E("%02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X:\n", *(ptr+i),
1329 *(ptr+i+1), *(ptr+i+2), *(ptr+i+3), *(ptr+i+4), *(ptr+i+5), *(ptr+i+6), *(ptr+i+7));
1330 DBG_88E("#############################\n");
1331 }
1332 }
1333 switch (type) {
1334 case WIFI_MGT_TYPE: /* mgnt */
1335 retval = validate_recv_mgnt_frame(adapter, precv_frame);
1336 if (retval == _FAIL)
1337 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("validate_recv_mgnt_frame fail\n"));
1338 retval = _FAIL; /* only data frame return _SUCCESS */
1339 break;
1340 case WIFI_CTRL_TYPE: /* ctrl */
1341 retval = validate_recv_ctrl_frame(adapter, precv_frame);
1342 if (retval == _FAIL)
1343 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("validate_recv_ctrl_frame fail\n"));
1344 retval = _FAIL; /* only data frame return _SUCCESS */
1345 break;
1346 case WIFI_DATA_TYPE: /* data */
1347 rtw_led_control(adapter, LED_CTL_RX);
1348 pattrib->qos = (subtype & BIT(7)) ? 1 : 0;
1349 retval = validate_recv_data_frame(adapter, precv_frame);
1350 if (retval == _FAIL) {
1351 struct recv_priv *precvpriv = &adapter->recvpriv;
1352 precvpriv->rx_drop++;
1353 }
1354 break;
1355 default:
1356 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("validate_recv_data_frame fail! type= 0x%x\n", type));
1357 retval = _FAIL;
1358 break;
1359 }
1360
1361 exit:
1362
1363
1364 return retval;
1365 }
1366
1367 /* remove the wlanhdr and add the eth_hdr */
1368
wlanhdr_to_ethhdr(struct recv_frame * precvframe)1369 static int wlanhdr_to_ethhdr(struct recv_frame *precvframe)
1370 {
1371 int rmv_len;
1372 u16 eth_type, len;
1373 __be16 be_tmp;
1374 u8 bsnaphdr;
1375 u8 *psnap_type;
1376 struct ieee80211_snap_hdr *psnap;
1377
1378 struct adapter *adapter = precvframe->adapter;
1379 struct mlme_priv *pmlmepriv = &adapter->mlmepriv;
1380 u8 *ptr = precvframe->rx_data;
1381 struct rx_pkt_attrib *pattrib = &precvframe->attrib;
1382
1383 if (pattrib->encrypt)
1384 recvframe_pull_tail(precvframe, pattrib->icv_len);
1385
1386 psnap = (struct ieee80211_snap_hdr *)(ptr+pattrib->hdrlen + pattrib->iv_len);
1387 psnap_type = ptr+pattrib->hdrlen + pattrib->iv_len+SNAP_SIZE;
1388 /* convert hdr + possible LLC headers into Ethernet header */
1389 if ((!memcmp(psnap, rtw_rfc1042_header, SNAP_SIZE) &&
1390 (!memcmp(psnap_type, SNAP_ETH_TYPE_IPX, 2) == false) &&
1391 (!memcmp(psnap_type, SNAP_ETH_TYPE_APPLETALK_AARP, 2) == false)) ||
1392 !memcmp(psnap, rtw_bridge_tunnel_header, SNAP_SIZE)) {
1393 /* remove RFC1042 or Bridge-Tunnel encapsulation and replace EtherType */
1394 bsnaphdr = true;
1395 } else {
1396 /* Leave Ethernet header part of hdr and full payload */
1397 bsnaphdr = false;
1398 }
1399
1400 rmv_len = pattrib->hdrlen + pattrib->iv_len + (bsnaphdr ? SNAP_SIZE : 0);
1401 len = precvframe->len - rmv_len;
1402
1403 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
1404 ("\n===pattrib->hdrlen: %x, pattrib->iv_len:%x===\n\n", pattrib->hdrlen, pattrib->iv_len));
1405
1406 memcpy(&be_tmp, ptr+rmv_len, 2);
1407 eth_type = ntohs(be_tmp); /* pattrib->ether_type */
1408 pattrib->eth_type = eth_type;
1409
1410 if ((check_fwstate(pmlmepriv, WIFI_MP_STATE))) {
1411 ptr += rmv_len;
1412 *ptr = 0x87;
1413 *(ptr+1) = 0x12;
1414
1415 eth_type = 0x8712;
1416 /* append rx status for mp test packets */
1417 ptr = recvframe_pull(precvframe, (rmv_len-sizeof(struct ethhdr)+2)-24);
1418 memcpy(ptr, get_rxmem(precvframe), 24);
1419 ptr += 24;
1420 } else {
1421 ptr = recvframe_pull(precvframe, (rmv_len-sizeof(struct ethhdr) + (bsnaphdr ? 2 : 0)));
1422 }
1423
1424 memcpy(ptr, pattrib->dst, ETH_ALEN);
1425 memcpy(ptr+ETH_ALEN, pattrib->src, ETH_ALEN);
1426
1427 if (!bsnaphdr) {
1428 be_tmp = htons(len);
1429 memcpy(ptr+12, &be_tmp, 2);
1430 }
1431
1432 return _SUCCESS;
1433 }
1434
1435 /* perform defrag */
recvframe_defrag(struct adapter * adapter,struct __queue * defrag_q)1436 static struct recv_frame *recvframe_defrag(struct adapter *adapter,
1437 struct __queue *defrag_q)
1438 {
1439 struct list_head *plist, *phead;
1440 u8 wlanhdr_offset;
1441 u8 curfragnum;
1442 struct recv_frame *pfhdr, *pnfhdr;
1443 struct recv_frame *prframe, *pnextrframe;
1444 struct __queue *pfree_recv_queue;
1445
1446
1447 curfragnum = 0;
1448 pfree_recv_queue = &adapter->recvpriv.free_recv_queue;
1449
1450 phead = get_list_head(defrag_q);
1451 plist = phead->next;
1452 pfhdr = container_of(plist, struct recv_frame, list);
1453 prframe = (struct recv_frame *)pfhdr;
1454 list_del_init(&(prframe->list));
1455
1456 if (curfragnum != pfhdr->attrib.frag_num) {
1457 /* the first fragment number must be 0 */
1458 /* free the whole queue */
1459 rtw_free_recvframe(prframe, pfree_recv_queue);
1460 rtw_free_recvframe_queue(defrag_q, pfree_recv_queue);
1461
1462 return NULL;
1463 }
1464
1465 curfragnum++;
1466
1467 plist = get_list_head(defrag_q);
1468
1469 plist = plist->next;
1470
1471 while (phead != plist) {
1472 pnfhdr = container_of(plist, struct recv_frame, list);
1473 pnextrframe = (struct recv_frame *)pnfhdr;
1474
1475 /* check the fragment sequence (2nd ~n fragment frame) */
1476
1477 if (curfragnum != pnfhdr->attrib.frag_num) {
1478 /* the fragment number must be increasing (after decache) */
1479 /* release the defrag_q & prframe */
1480 rtw_free_recvframe(prframe, pfree_recv_queue);
1481 rtw_free_recvframe_queue(defrag_q, pfree_recv_queue);
1482 return NULL;
1483 }
1484
1485 curfragnum++;
1486
1487 /* copy the 2nd~n fragment frame's payload to the first fragment */
1488 /* get the 2nd~last fragment frame's payload */
1489
1490 wlanhdr_offset = pnfhdr->attrib.hdrlen + pnfhdr->attrib.iv_len;
1491
1492 recvframe_pull(pnextrframe, wlanhdr_offset);
1493
1494 /* append to first fragment frame's tail (if privacy frame, pull the ICV) */
1495 recvframe_pull_tail(prframe, pfhdr->attrib.icv_len);
1496
1497 /* memcpy */
1498 memcpy(pfhdr->rx_tail, pnfhdr->rx_data, pnfhdr->len);
1499
1500 recvframe_put(prframe, pnfhdr->len);
1501
1502 pfhdr->attrib.icv_len = pnfhdr->attrib.icv_len;
1503 plist = plist->next;
1504 }
1505
1506 /* free the defrag_q queue and return the prframe */
1507 rtw_free_recvframe_queue(defrag_q, pfree_recv_queue);
1508
1509 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("Performance defrag!!!!!\n"));
1510
1511
1512 return prframe;
1513 }
1514
1515 /* check if need to defrag, if needed queue the frame to defrag_q */
recvframe_chk_defrag(struct adapter * padapter,struct recv_frame * precv_frame)1516 struct recv_frame *recvframe_chk_defrag(struct adapter *padapter,
1517 struct recv_frame *precv_frame)
1518 {
1519 u8 ismfrag;
1520 u8 fragnum;
1521 u8 *psta_addr;
1522 struct recv_frame *pfhdr;
1523 struct sta_info *psta;
1524 struct sta_priv *pstapriv;
1525 struct list_head *phead;
1526 struct recv_frame *prtnframe = NULL;
1527 struct __queue *pfree_recv_queue, *pdefrag_q;
1528
1529
1530 pstapriv = &padapter->stapriv;
1531
1532 pfhdr = precv_frame;
1533
1534 pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
1535
1536 /* need to define struct of wlan header frame ctrl */
1537 ismfrag = pfhdr->attrib.mfrag;
1538 fragnum = pfhdr->attrib.frag_num;
1539
1540 psta_addr = pfhdr->attrib.ta;
1541 psta = rtw_get_stainfo(pstapriv, psta_addr);
1542 if (psta == NULL) {
1543 u8 type = GetFrameType(pfhdr->rx_data);
1544 if (type != WIFI_DATA_TYPE) {
1545 psta = rtw_get_bcmc_stainfo(padapter);
1546 pdefrag_q = &psta->sta_recvpriv.defrag_q;
1547 } else {
1548 pdefrag_q = NULL;
1549 }
1550 } else {
1551 pdefrag_q = &psta->sta_recvpriv.defrag_q;
1552 }
1553
1554 if ((ismfrag == 0) && (fragnum == 0))
1555 prtnframe = precv_frame;/* isn't a fragment frame */
1556
1557 if (ismfrag == 1) {
1558 /* 0~(n-1) fragment frame */
1559 /* enqueue to defraf_g */
1560 if (pdefrag_q != NULL) {
1561 if (fragnum == 0) {
1562 /* the first fragment */
1563 if (!list_empty(&pdefrag_q->queue)) {
1564 /* free current defrag_q */
1565 rtw_free_recvframe_queue(pdefrag_q, pfree_recv_queue);
1566 }
1567 }
1568
1569 /* Then enqueue the 0~(n-1) fragment into the defrag_q */
1570
1571 phead = get_list_head(pdefrag_q);
1572 list_add_tail(&pfhdr->list, phead);
1573
1574 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("Enqueuq: ismfrag=%d, fragnum=%d\n", ismfrag, fragnum));
1575
1576 prtnframe = NULL;
1577 } else {
1578 /* can't find this ta's defrag_queue, so free this recv_frame */
1579 rtw_free_recvframe(precv_frame, pfree_recv_queue);
1580 prtnframe = NULL;
1581 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("Free because pdefrag_q==NULL: ismfrag=%d, fragnum=%d\n", ismfrag, fragnum));
1582 }
1583 }
1584
1585 if ((ismfrag == 0) && (fragnum != 0)) {
1586 /* the last fragment frame */
1587 /* enqueue the last fragment */
1588 if (pdefrag_q != NULL) {
1589 phead = get_list_head(pdefrag_q);
1590 list_add_tail(&pfhdr->list, phead);
1591
1592 /* call recvframe_defrag to defrag */
1593 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("defrag: ismfrag=%d, fragnum=%d\n", ismfrag, fragnum));
1594 precv_frame = recvframe_defrag(padapter, pdefrag_q);
1595 prtnframe = precv_frame;
1596 } else {
1597 /* can't find this ta's defrag_queue, so free this recv_frame */
1598 rtw_free_recvframe(precv_frame, pfree_recv_queue);
1599 prtnframe = NULL;
1600 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("Free because pdefrag_q==NULL: ismfrag=%d, fragnum=%d\n", ismfrag, fragnum));
1601 }
1602 }
1603
1604 if ((prtnframe != NULL) && (prtnframe->attrib.privacy)) {
1605 /* after defrag we must check tkip mic code */
1606 if (recvframe_chkmic(padapter, prtnframe) == _FAIL) {
1607 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("recvframe_chkmic(padapter, prtnframe)==_FAIL\n"));
1608 rtw_free_recvframe(prtnframe, pfree_recv_queue);
1609 prtnframe = NULL;
1610 }
1611 }
1612
1613
1614 return prtnframe;
1615 }
1616
amsdu_to_msdu(struct adapter * padapter,struct recv_frame * prframe)1617 static int amsdu_to_msdu(struct adapter *padapter, struct recv_frame *prframe)
1618 {
1619 int a_len, padding_len;
1620 u16 eth_type, nSubframe_Length;
1621 u8 nr_subframes, i;
1622 unsigned char *pdata;
1623 struct rx_pkt_attrib *pattrib;
1624 unsigned char *data_ptr;
1625 struct sk_buff *sub_skb, *subframes[MAX_SUBFRAME_COUNT];
1626 struct recv_priv *precvpriv = &padapter->recvpriv;
1627 struct __queue *pfree_recv_queue = &(precvpriv->free_recv_queue);
1628 nr_subframes = 0;
1629
1630 pattrib = &prframe->attrib;
1631
1632 recvframe_pull(prframe, prframe->attrib.hdrlen);
1633
1634 if (prframe->attrib.iv_len > 0)
1635 recvframe_pull(prframe, prframe->attrib.iv_len);
1636
1637 a_len = prframe->len;
1638
1639 pdata = prframe->rx_data;
1640
1641 while (a_len > ETH_HLEN) {
1642 /* Offset 12 denote 2 mac address */
1643 nSubframe_Length = get_unaligned_be16(pdata + 12);
1644
1645 if (a_len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) {
1646 DBG_88E("nRemain_Length is %d and nSubframe_Length is : %d\n", a_len, nSubframe_Length);
1647 goto exit;
1648 }
1649
1650 /* move the data point to data content */
1651 pdata += ETH_HLEN;
1652 a_len -= ETH_HLEN;
1653
1654 /* Allocate new skb for releasing to upper layer */
1655 sub_skb = dev_alloc_skb(nSubframe_Length + 12);
1656 if (sub_skb) {
1657 skb_reserve(sub_skb, 12);
1658 data_ptr = (u8 *)skb_put(sub_skb, nSubframe_Length);
1659 memcpy(data_ptr, pdata, nSubframe_Length);
1660 } else {
1661 sub_skb = skb_clone(prframe->pkt, GFP_ATOMIC);
1662 if (sub_skb) {
1663 sub_skb->data = pdata;
1664 sub_skb->len = nSubframe_Length;
1665 skb_set_tail_pointer(sub_skb, nSubframe_Length);
1666 } else {
1667 DBG_88E("skb_clone() Fail!!! , nr_subframes=%d\n", nr_subframes);
1668 break;
1669 }
1670 }
1671
1672 subframes[nr_subframes++] = sub_skb;
1673
1674 if (nr_subframes >= MAX_SUBFRAME_COUNT) {
1675 DBG_88E("ParseSubframe(): Too many Subframes! Packets dropped!\n");
1676 break;
1677 }
1678
1679 pdata += nSubframe_Length;
1680 a_len -= nSubframe_Length;
1681 if (a_len != 0) {
1682 padding_len = 4 - ((nSubframe_Length + ETH_HLEN) & (4-1));
1683 if (padding_len == 4) {
1684 padding_len = 0;
1685 }
1686
1687 if (a_len < padding_len) {
1688 goto exit;
1689 }
1690 pdata += padding_len;
1691 a_len -= padding_len;
1692 }
1693 }
1694
1695 for (i = 0; i < nr_subframes; i++) {
1696 sub_skb = subframes[i];
1697 /* convert hdr + possible LLC headers into Ethernet header */
1698 eth_type = get_unaligned_be16(&sub_skb->data[6]);
1699 if (sub_skb->len >= 8 &&
1700 ((!memcmp(sub_skb->data, rtw_rfc1042_header, SNAP_SIZE) &&
1701 eth_type != ETH_P_AARP && eth_type != ETH_P_IPX) ||
1702 !memcmp(sub_skb->data, rtw_bridge_tunnel_header, SNAP_SIZE))) {
1703 /* remove RFC1042 or Bridge-Tunnel encapsulation and replace EtherType */
1704 skb_pull(sub_skb, SNAP_SIZE);
1705 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src, ETH_ALEN);
1706 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst, ETH_ALEN);
1707 } else {
1708 __be16 len;
1709 /* Leave Ethernet header part of hdr and full payload */
1710 len = htons(sub_skb->len);
1711 memcpy(skb_push(sub_skb, 2), &len, 2);
1712 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src, ETH_ALEN);
1713 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst, ETH_ALEN);
1714 }
1715
1716 /* Indicate the packets to upper layer */
1717 /* Insert NAT2.5 RX here! */
1718 sub_skb->protocol = eth_type_trans(sub_skb, padapter->pnetdev);
1719 sub_skb->dev = padapter->pnetdev;
1720
1721 sub_skb->ip_summed = CHECKSUM_NONE;
1722
1723 netif_rx(sub_skb);
1724 }
1725
1726 exit:
1727
1728 prframe->len = 0;
1729 rtw_free_recvframe(prframe, pfree_recv_queue);/* free this recv_frame */
1730
1731 return _SUCCESS;
1732 }
1733
check_indicate_seq(struct recv_reorder_ctrl * preorder_ctrl,u16 seq_num)1734 static int check_indicate_seq(struct recv_reorder_ctrl *preorder_ctrl, u16 seq_num)
1735 {
1736 u8 wsize = preorder_ctrl->wsize_b;
1737 u16 wend = (preorder_ctrl->indicate_seq + wsize - 1) & 0xFFF;/* 4096; */
1738
1739 /* Rx Reorder initialize condition. */
1740 if (preorder_ctrl->indicate_seq == 0xFFFF)
1741 preorder_ctrl->indicate_seq = seq_num;
1742
1743 /* Drop out the packet which SeqNum is smaller than WinStart */
1744 if (SN_LESS(seq_num, preorder_ctrl->indicate_seq))
1745 return false;
1746
1747 /* */
1748 /* Sliding window manipulation. Conditions includes: */
1749 /* 1. Incoming SeqNum is equal to WinStart =>Window shift 1 */
1750 /* 2. Incoming SeqNum is larger than the WinEnd => Window shift N */
1751 /* */
1752 if (SN_EQUAL(seq_num, preorder_ctrl->indicate_seq)) {
1753 preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1) & 0xFFF;
1754 } else if (SN_LESS(wend, seq_num)) {
1755 if (seq_num >= (wsize - 1))
1756 preorder_ctrl->indicate_seq = seq_num + 1 - wsize;
1757 else
1758 preorder_ctrl->indicate_seq = 0xFFF - (wsize - (seq_num + 1)) + 1;
1759 }
1760
1761 return true;
1762 }
1763
enqueue_reorder_recvframe(struct recv_reorder_ctrl * preorder_ctrl,struct recv_frame * prframe)1764 static int enqueue_reorder_recvframe(struct recv_reorder_ctrl *preorder_ctrl,
1765 struct recv_frame *prframe)
1766 {
1767 struct rx_pkt_attrib *pattrib = &prframe->attrib;
1768 struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
1769 struct list_head *phead, *plist;
1770 struct recv_frame *hdr;
1771 struct rx_pkt_attrib *pnextattrib;
1772
1773 phead = get_list_head(ppending_recvframe_queue);
1774 plist = phead->next;
1775
1776 while (phead != plist) {
1777 hdr = container_of(plist, struct recv_frame, list);
1778 pnextattrib = &hdr->attrib;
1779
1780 if (SN_LESS(pnextattrib->seq_num, pattrib->seq_num))
1781 plist = plist->next;
1782 else if (SN_EQUAL(pnextattrib->seq_num, pattrib->seq_num))
1783 return false;
1784 else
1785 break;
1786 }
1787
1788 list_del_init(&(prframe->list));
1789
1790 list_add_tail(&(prframe->list), plist);
1791 return true;
1792 }
1793
recv_indicatepkts_in_order(struct adapter * padapter,struct recv_reorder_ctrl * preorder_ctrl,int bforced)1794 static int recv_indicatepkts_in_order(struct adapter *padapter, struct recv_reorder_ctrl *preorder_ctrl, int bforced)
1795 {
1796 struct list_head *phead, *plist;
1797 struct recv_frame *prframe;
1798 struct recv_frame *prhdr;
1799 struct rx_pkt_attrib *pattrib;
1800 int bPktInBuf = false;
1801 struct recv_priv *precvpriv = &padapter->recvpriv;
1802 struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
1803
1804 phead = get_list_head(ppending_recvframe_queue);
1805 plist = phead->next;
1806
1807 /* Handling some condition for forced indicate case. */
1808 if (bforced) {
1809 if (list_empty(phead))
1810 return true;
1811
1812 prhdr = container_of(plist, struct recv_frame, list);
1813 pattrib = &prhdr->attrib;
1814 preorder_ctrl->indicate_seq = pattrib->seq_num;
1815 }
1816
1817 /* Prepare indication list and indication. */
1818 /* Check if there is any packet need indicate. */
1819 while (!list_empty(phead)) {
1820 prhdr = container_of(plist, struct recv_frame, list);
1821 prframe = (struct recv_frame *)prhdr;
1822 pattrib = &prframe->attrib;
1823
1824 if (!SN_LESS(preorder_ctrl->indicate_seq, pattrib->seq_num)) {
1825 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_,
1826 ("recv_indicatepkts_in_order: indicate=%d seq=%d amsdu=%d\n",
1827 preorder_ctrl->indicate_seq, pattrib->seq_num, pattrib->amsdu));
1828 plist = plist->next;
1829 list_del_init(&(prframe->list));
1830
1831 if (SN_EQUAL(preorder_ctrl->indicate_seq, pattrib->seq_num))
1832 preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1) & 0xFFF;
1833
1834 /* Set this as a lock to make sure that only one thread is indicating packet. */
1835
1836 /* indicate this recv_frame */
1837 if (!pattrib->amsdu) {
1838 if ((!padapter->bDriverStopped) &&
1839 (!padapter->bSurpriseRemoved))
1840 rtw_recv_indicatepkt(padapter, prframe);/* indicate this recv_frame */
1841 } else if (pattrib->amsdu == 1) {
1842 if (amsdu_to_msdu(padapter, prframe) != _SUCCESS)
1843 rtw_free_recvframe(prframe, &precvpriv->free_recv_queue);
1844 } else {
1845 /* error condition; */
1846 }
1847
1848 /* Update local variables. */
1849 bPktInBuf = false;
1850 } else {
1851 bPktInBuf = true;
1852 break;
1853 }
1854 }
1855 return bPktInBuf;
1856 }
1857
recv_indicatepkt_reorder(struct adapter * padapter,struct recv_frame * prframe)1858 static int recv_indicatepkt_reorder(struct adapter *padapter,
1859 struct recv_frame *prframe)
1860 {
1861 int retval = _SUCCESS;
1862 struct rx_pkt_attrib *pattrib = &prframe->attrib;
1863 struct recv_reorder_ctrl *preorder_ctrl = prframe->preorder_ctrl;
1864 struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
1865
1866 if (!pattrib->amsdu) {
1867 /* s1. */
1868 wlanhdr_to_ethhdr(prframe);
1869
1870 if ((pattrib->qos != 1) || (pattrib->eth_type == 0x0806) ||
1871 (pattrib->ack_policy != 0)) {
1872 if ((!padapter->bDriverStopped) &&
1873 (!padapter->bSurpriseRemoved)) {
1874 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("@@@@ recv_indicatepkt_reorder -recv_func recv_indicatepkt\n"));
1875
1876 rtw_recv_indicatepkt(padapter, prframe);
1877 return _SUCCESS;
1878 }
1879
1880 return _FAIL;
1881 }
1882
1883 if (!preorder_ctrl->enable) {
1884 /* indicate this recv_frame */
1885 preorder_ctrl->indicate_seq = pattrib->seq_num;
1886 rtw_recv_indicatepkt(padapter, prframe);
1887
1888 preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1)%4096;
1889 return _SUCCESS;
1890 }
1891 } else if (pattrib->amsdu == 1) { /* temp filter -> means didn't support A-MSDUs in a A-MPDU */
1892 if (!preorder_ctrl->enable) {
1893 preorder_ctrl->indicate_seq = pattrib->seq_num;
1894 retval = amsdu_to_msdu(padapter, prframe);
1895
1896 preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1)%4096;
1897 return retval;
1898 }
1899 }
1900
1901 spin_lock_bh(&ppending_recvframe_queue->lock);
1902
1903 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_,
1904 ("recv_indicatepkt_reorder: indicate=%d seq=%d\n",
1905 preorder_ctrl->indicate_seq, pattrib->seq_num));
1906
1907 /* s2. check if winstart_b(indicate_seq) needs to been updated */
1908 if (!check_indicate_seq(preorder_ctrl, pattrib->seq_num)) {
1909 rtw_recv_indicatepkt(padapter, prframe);
1910
1911 spin_unlock_bh(&ppending_recvframe_queue->lock);
1912
1913 goto _success_exit;
1914 }
1915
1916 /* s3. Insert all packet into Reorder Queue to maintain its ordering. */
1917 if (!enqueue_reorder_recvframe(preorder_ctrl, prframe))
1918 goto _err_exit;
1919
1920 /* s4. */
1921 /* Indication process. */
1922 /* After Packet dropping and Sliding Window shifting as above, we can now just indicate the packets */
1923 /* with the SeqNum smaller than latest WinStart and buffer other packets. */
1924 /* */
1925 /* For Rx Reorder condition: */
1926 /* 1. All packets with SeqNum smaller than WinStart => Indicate */
1927 /* 2. All packets with SeqNum larger than or equal to WinStart => Buffer it. */
1928 /* */
1929
1930 /* recv_indicatepkts_in_order(padapter, preorder_ctrl, true); */
1931 if (recv_indicatepkts_in_order(padapter, preorder_ctrl, false)) {
1932 mod_timer(&preorder_ctrl->reordering_ctrl_timer,
1933 jiffies + msecs_to_jiffies(REORDER_WAIT_TIME));
1934 spin_unlock_bh(&ppending_recvframe_queue->lock);
1935 } else {
1936 spin_unlock_bh(&ppending_recvframe_queue->lock);
1937 del_timer_sync(&preorder_ctrl->reordering_ctrl_timer);
1938 }
1939
1940 _success_exit:
1941
1942 return _SUCCESS;
1943
1944 _err_exit:
1945
1946 spin_unlock_bh(&ppending_recvframe_queue->lock);
1947
1948 return _FAIL;
1949 }
1950
rtw_reordering_ctrl_timeout_handler(unsigned long data)1951 void rtw_reordering_ctrl_timeout_handler(unsigned long data)
1952 {
1953 struct recv_reorder_ctrl *preorder_ctrl = (struct recv_reorder_ctrl *)data;
1954 struct adapter *padapter = preorder_ctrl->padapter;
1955 struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
1956
1957 if (padapter->bDriverStopped || padapter->bSurpriseRemoved)
1958 return;
1959
1960 spin_lock_bh(&ppending_recvframe_queue->lock);
1961
1962 if (recv_indicatepkts_in_order(padapter, preorder_ctrl, true) == true)
1963 mod_timer(&preorder_ctrl->reordering_ctrl_timer,
1964 jiffies + msecs_to_jiffies(REORDER_WAIT_TIME));
1965
1966 spin_unlock_bh(&ppending_recvframe_queue->lock);
1967 }
1968
process_recv_indicatepkts(struct adapter * padapter,struct recv_frame * prframe)1969 static int process_recv_indicatepkts(struct adapter *padapter,
1970 struct recv_frame *prframe)
1971 {
1972 int retval = _SUCCESS;
1973 struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
1974 struct ht_priv *phtpriv = &pmlmepriv->htpriv;
1975
1976 if (phtpriv->ht_option) { /* B/G/N Mode */
1977 if (recv_indicatepkt_reorder(padapter, prframe) != _SUCCESS) {
1978 /* including perform A-MPDU Rx Ordering Buffer Control */
1979 if ((!padapter->bDriverStopped) &&
1980 (!padapter->bSurpriseRemoved)) {
1981 retval = _FAIL;
1982 return retval;
1983 }
1984 }
1985 } else { /* B/G mode */
1986 retval = wlanhdr_to_ethhdr(prframe);
1987 if (retval != _SUCCESS) {
1988 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("wlanhdr_to_ethhdr: drop pkt\n"));
1989 return retval;
1990 }
1991
1992 if ((!padapter->bDriverStopped) &&
1993 (!padapter->bSurpriseRemoved)) {
1994 /* indicate this recv_frame */
1995 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("@@@@ process_recv_indicatepkts- recv_func recv_indicatepkt\n"));
1996 rtw_recv_indicatepkt(padapter, prframe);
1997 } else {
1998 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("@@@@ process_recv_indicatepkts- recv_func free_indicatepkt\n"));
1999
2000 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("recv_func:bDriverStopped(%d) OR bSurpriseRemoved(%d)", padapter->bDriverStopped, padapter->bSurpriseRemoved));
2001 retval = _FAIL;
2002 return retval;
2003 }
2004 }
2005
2006 return retval;
2007 }
2008
recv_func_prehandle(struct adapter * padapter,struct recv_frame * rframe)2009 static int recv_func_prehandle(struct adapter *padapter,
2010 struct recv_frame *rframe)
2011 {
2012 int ret = _SUCCESS;
2013 struct __queue *pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
2014
2015 /* check the frame crtl field and decache */
2016 ret = validate_recv_frame(padapter, rframe);
2017 if (ret != _SUCCESS) {
2018 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("recv_func: validate_recv_frame fail! drop pkt\n"));
2019 rtw_free_recvframe(rframe, pfree_recv_queue);/* free this recv_frame */
2020 goto exit;
2021 }
2022
2023 exit:
2024 return ret;
2025 }
2026
recv_func_posthandle(struct adapter * padapter,struct recv_frame * prframe)2027 static int recv_func_posthandle(struct adapter *padapter,
2028 struct recv_frame *prframe)
2029 {
2030 int ret = _SUCCESS;
2031 struct recv_frame *orig_prframe = prframe;
2032 struct recv_priv *precvpriv = &padapter->recvpriv;
2033 struct __queue *pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
2034
2035 /* DATA FRAME */
2036 rtw_led_control(padapter, LED_CTL_RX);
2037
2038 prframe = decryptor(padapter, prframe);
2039 if (prframe == NULL) {
2040 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("decryptor: drop pkt\n"));
2041 ret = _FAIL;
2042 goto _recv_data_drop;
2043 }
2044
2045 prframe = recvframe_chk_defrag(padapter, prframe);
2046 if (prframe == NULL) {
2047 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("recvframe_chk_defrag: drop pkt\n"));
2048 goto _recv_data_drop;
2049 }
2050
2051 prframe = portctrl(padapter, prframe);
2052 if (prframe == NULL) {
2053 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("portctrl: drop pkt\n"));
2054 ret = _FAIL;
2055 goto _recv_data_drop;
2056 }
2057
2058 count_rx_stats(padapter, prframe, NULL);
2059
2060 ret = process_recv_indicatepkts(padapter, prframe);
2061 if (ret != _SUCCESS) {
2062 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("recv_func: process_recv_indicatepkts fail!\n"));
2063 rtw_free_recvframe(orig_prframe, pfree_recv_queue);/* free this recv_frame */
2064 goto _recv_data_drop;
2065 }
2066 return ret;
2067
2068 _recv_data_drop:
2069 precvpriv->rx_drop++;
2070 return ret;
2071 }
2072
recv_func(struct adapter * padapter,struct recv_frame * rframe)2073 static int recv_func(struct adapter *padapter, struct recv_frame *rframe)
2074 {
2075 int ret;
2076 struct rx_pkt_attrib *prxattrib = &rframe->attrib;
2077 struct security_priv *psecuritypriv = &padapter->securitypriv;
2078 struct mlme_priv *mlmepriv = &padapter->mlmepriv;
2079
2080 /* check if need to handle uc_swdec_pending_queue*/
2081 if (check_fwstate(mlmepriv, WIFI_STATION_STATE) && psecuritypriv->busetkipkey) {
2082 struct recv_frame *pending_frame;
2083
2084 while ((pending_frame = rtw_alloc_recvframe(&padapter->recvpriv.uc_swdec_pending_queue))) {
2085 if (recv_func_posthandle(padapter, pending_frame) == _SUCCESS)
2086 DBG_88E("%s: dequeue uc_swdec_pending_queue\n", __func__);
2087 }
2088 }
2089
2090 ret = recv_func_prehandle(padapter, rframe);
2091
2092 if (ret == _SUCCESS) {
2093 /* check if need to enqueue into uc_swdec_pending_queue*/
2094 if (check_fwstate(mlmepriv, WIFI_STATION_STATE) &&
2095 !IS_MCAST(prxattrib->ra) && prxattrib->encrypt > 0 &&
2096 (prxattrib->bdecrypted == 0 || psecuritypriv->sw_decrypt) &&
2097 !is_wep_enc(psecuritypriv->dot11PrivacyAlgrthm) &&
2098 !psecuritypriv->busetkipkey) {
2099 rtw_enqueue_recvframe(rframe, &padapter->recvpriv.uc_swdec_pending_queue);
2100 DBG_88E("%s: no key, enqueue uc_swdec_pending_queue\n", __func__);
2101 goto exit;
2102 }
2103
2104 ret = recv_func_posthandle(padapter, rframe);
2105 }
2106
2107 exit:
2108 return ret;
2109 }
2110
rtw_recv_entry(struct recv_frame * precvframe)2111 s32 rtw_recv_entry(struct recv_frame *precvframe)
2112 {
2113 struct adapter *padapter;
2114 struct recv_priv *precvpriv;
2115 s32 ret = _SUCCESS;
2116
2117
2118 padapter = precvframe->adapter;
2119
2120 precvpriv = &padapter->recvpriv;
2121
2122 ret = recv_func(padapter, precvframe);
2123 if (ret == _FAIL) {
2124 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("rtw_recv_entry: recv_func return fail!!!\n"));
2125 goto _recv_entry_drop;
2126 }
2127
2128 precvpriv->rx_pkts++;
2129
2130
2131 return ret;
2132
2133 _recv_entry_drop:
2134 return ret;
2135 }
2136
rtw_signal_stat_timer_hdl(unsigned long data)2137 void rtw_signal_stat_timer_hdl(unsigned long data)
2138 {
2139 struct adapter *adapter = (struct adapter *)data;
2140 struct recv_priv *recvpriv = &adapter->recvpriv;
2141
2142 u32 tmp_s, tmp_q;
2143 u8 avg_signal_strength = 0;
2144 u8 avg_signal_qual = 0;
2145 u8 _alpha = 3; /* this value is based on converging_constant = 5000 and sampling_interval = 1000 */
2146
2147 if (adapter->recvpriv.is_signal_dbg) {
2148 /* update the user specific value, signal_strength_dbg, to signal_strength, rssi */
2149 adapter->recvpriv.signal_strength = adapter->recvpriv.signal_strength_dbg;
2150 adapter->recvpriv.rssi = (s8)translate_percentage_to_dbm((u8)adapter->recvpriv.signal_strength_dbg);
2151 } else {
2152 if (recvpriv->signal_strength_data.update_req == 0) {/* update_req is clear, means we got rx */
2153 avg_signal_strength = recvpriv->signal_strength_data.avg_val;
2154 /* after avg_vals are acquired, we can re-stat the signal values */
2155 recvpriv->signal_strength_data.update_req = 1;
2156 }
2157
2158 if (recvpriv->signal_qual_data.update_req == 0) {/* update_req is clear, means we got rx */
2159 avg_signal_qual = recvpriv->signal_qual_data.avg_val;
2160 /* after avg_vals are acquired, we can re-stat the signal values */
2161 recvpriv->signal_qual_data.update_req = 1;
2162 }
2163
2164 /* update value of signal_strength, rssi, signal_qual */
2165 if (check_fwstate(&adapter->mlmepriv, _FW_UNDER_SURVEY) == false) {
2166 tmp_s = avg_signal_strength+(_alpha-1)*recvpriv->signal_strength;
2167 if (tmp_s % _alpha)
2168 tmp_s = tmp_s/_alpha + 1;
2169 else
2170 tmp_s = tmp_s/_alpha;
2171 if (tmp_s > 100)
2172 tmp_s = 100;
2173
2174 tmp_q = avg_signal_qual+(_alpha-1)*recvpriv->signal_qual;
2175 if (tmp_q % _alpha)
2176 tmp_q = tmp_q/_alpha + 1;
2177 else
2178 tmp_q = tmp_q/_alpha;
2179 if (tmp_q > 100)
2180 tmp_q = 100;
2181
2182 recvpriv->signal_strength = tmp_s;
2183 recvpriv->rssi = (s8)translate_percentage_to_dbm(tmp_s);
2184 recvpriv->signal_qual = tmp_q;
2185 }
2186 }
2187 rtw_set_signal_stat_timer(recvpriv);
2188 }
2189