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 ******************************************************************************/
15 #define _RTW_RECV_C_
16
17 #include <linux/ieee80211.h>
18
19 #include <osdep_service.h>
20 #include <drv_types.h>
21 #include <recv_osdep.h>
22 #include <mlme_osdep.h>
23 #include <mon.h>
24 #include <wifi.h>
25 #include <linux/vmalloc.h>
26
27 #define ETHERNET_HEADER_SIZE 14 /* Ethernet Header Length */
28 #define LLC_HEADER_SIZE 6 /* LLC Header Length */
29
30 static u8 SNAP_ETH_TYPE_IPX[2] = {0x81, 0x37};
31 static u8 SNAP_ETH_TYPE_APPLETALK_AARP[2] = {0x80, 0xf3};
32
33 /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */
34 static u8 rtw_bridge_tunnel_header[] = {
35 0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8
36 };
37
38 static u8 rtw_rfc1042_header[] = {
39 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00
40 };
41
42 static void rtw_signal_stat_timer_hdl(unsigned long data);
43
_rtw_init_sta_recv_priv(struct sta_recv_priv * psta_recvpriv)44 void _rtw_init_sta_recv_priv(struct sta_recv_priv *psta_recvpriv)
45 {
46
47 memset((u8 *)psta_recvpriv, 0, sizeof(struct sta_recv_priv));
48
49 spin_lock_init(&psta_recvpriv->lock);
50
51 _rtw_init_queue(&psta_recvpriv->defrag_q);
52
53 }
54
_rtw_init_recv_priv(struct recv_priv * precvpriv,struct adapter * padapter)55 int _rtw_init_recv_priv(struct recv_priv *precvpriv, struct adapter *padapter)
56 {
57 int i;
58
59 struct recv_frame *precvframe;
60
61 int res = _SUCCESS;
62
63 _rtw_init_queue(&precvpriv->free_recv_queue);
64 _rtw_init_queue(&precvpriv->recv_pending_queue);
65 _rtw_init_queue(&precvpriv->uc_swdec_pending_queue);
66
67 precvpriv->adapter = padapter;
68
69 precvpriv->free_recvframe_cnt = NR_RECVFRAME;
70
71 precvpriv->pallocated_frame_buf = vzalloc(NR_RECVFRAME * sizeof(struct recv_frame) + RXFRAME_ALIGN_SZ);
72
73 if (!precvpriv->pallocated_frame_buf)
74 return _FAIL;
75
76 precvpriv->precv_frame_buf = PTR_ALIGN(precvpriv->pallocated_frame_buf, RXFRAME_ALIGN_SZ);
77
78 precvframe = (struct recv_frame *)precvpriv->precv_frame_buf;
79
80 for (i = 0; i < NR_RECVFRAME; i++) {
81 INIT_LIST_HEAD(&(precvframe->list));
82
83 list_add_tail(&(precvframe->list),
84 &(precvpriv->free_recv_queue.queue));
85
86 rtw_os_recv_resource_alloc(precvframe);
87
88 precvframe->len = 0;
89
90 precvframe->adapter = padapter;
91 precvframe++;
92 }
93 precvpriv->rx_pending_cnt = 1;
94
95 res = rtw_hal_init_recv_priv(padapter);
96
97 setup_timer(&precvpriv->signal_stat_timer,
98 rtw_signal_stat_timer_hdl,
99 (unsigned long)padapter);
100
101 precvpriv->signal_stat_sampling_interval = 1000; /* ms */
102
103 rtw_set_signal_stat_timer(precvpriv);
104
105 return res;
106 }
107
_rtw_free_recv_priv(struct recv_priv * precvpriv)108 void _rtw_free_recv_priv(struct recv_priv *precvpriv)
109 {
110 struct adapter *padapter = precvpriv->adapter;
111
112 rtw_free_uc_swdec_pending_queue(padapter);
113
114 vfree(precvpriv->pallocated_frame_buf);
115
116 rtw_hal_free_recv_priv(padapter);
117
118 }
119
_rtw_alloc_recvframe(struct __queue * pfree_recv_queue)120 struct recv_frame *_rtw_alloc_recvframe(struct __queue *pfree_recv_queue)
121 {
122 struct recv_frame *hdr;
123 struct adapter *padapter;
124 struct recv_priv *precvpriv;
125
126 hdr = list_first_entry_or_null(&pfree_recv_queue->queue,
127 struct recv_frame, list);
128 if (hdr) {
129 list_del_init(&hdr->list);
130 padapter = hdr->adapter;
131 if (padapter) {
132 precvpriv = &padapter->recvpriv;
133 if (pfree_recv_queue == &precvpriv->free_recv_queue)
134 precvpriv->free_recvframe_cnt--;
135 }
136 }
137
138 return hdr;
139 }
140
rtw_alloc_recvframe(struct __queue * pfree_recv_queue)141 struct recv_frame *rtw_alloc_recvframe(struct __queue *pfree_recv_queue)
142 {
143 struct recv_frame *precvframe;
144
145 spin_lock_bh(&pfree_recv_queue->lock);
146
147 precvframe = _rtw_alloc_recvframe(pfree_recv_queue);
148
149 spin_unlock_bh(&pfree_recv_queue->lock);
150
151 return precvframe;
152 }
153
rtw_free_recvframe(struct recv_frame * precvframe,struct __queue * pfree_recv_queue)154 int rtw_free_recvframe(struct recv_frame *precvframe,
155 struct __queue *pfree_recv_queue)
156 {
157 struct adapter *padapter;
158 struct recv_priv *precvpriv;
159
160 if (!precvframe)
161 return _FAIL;
162 padapter = precvframe->adapter;
163 precvpriv = &padapter->recvpriv;
164 if (precvframe->pkt) {
165 dev_kfree_skb_any(precvframe->pkt);/* free skb by driver */
166 precvframe->pkt = NULL;
167 }
168
169 spin_lock_bh(&pfree_recv_queue->lock);
170
171 list_del_init(&(precvframe->list));
172
173 precvframe->len = 0;
174
175 list_add_tail(&(precvframe->list), get_list_head(pfree_recv_queue));
176
177 if (padapter != NULL) {
178 if (pfree_recv_queue == &precvpriv->free_recv_queue)
179 precvpriv->free_recvframe_cnt++;
180 }
181
182 spin_unlock_bh(&pfree_recv_queue->lock);
183
184 return _SUCCESS;
185 }
186
_rtw_enqueue_recvframe(struct recv_frame * precvframe,struct __queue * queue)187 int _rtw_enqueue_recvframe(struct recv_frame *precvframe, struct __queue *queue)
188 {
189 struct adapter *padapter = precvframe->adapter;
190 struct recv_priv *precvpriv = &padapter->recvpriv;
191
192 list_del_init(&(precvframe->list));
193 list_add_tail(&(precvframe->list), get_list_head(queue));
194
195 if (padapter != NULL) {
196 if (queue == &precvpriv->free_recv_queue)
197 precvpriv->free_recvframe_cnt++;
198 }
199
200 return _SUCCESS;
201 }
202
rtw_enqueue_recvframe(struct recv_frame * precvframe,struct __queue * queue)203 int rtw_enqueue_recvframe(struct recv_frame *precvframe, struct __queue *queue)
204 {
205 int ret;
206
207 spin_lock_bh(&queue->lock);
208 ret = _rtw_enqueue_recvframe(precvframe, queue);
209 spin_unlock_bh(&queue->lock);
210
211 return ret;
212 }
213
214 /*
215 caller : defrag ; recvframe_chk_defrag in recv_thread (passive)
216 pframequeue: defrag_queue : will be accessed in recv_thread (passive)
217
218 using spinlock to protect
219
220 */
221
rtw_free_recvframe_queue(struct __queue * pframequeue,struct __queue * pfree_recv_queue)222 void rtw_free_recvframe_queue(struct __queue *pframequeue, struct __queue *pfree_recv_queue)
223 {
224 struct recv_frame *hdr;
225 struct list_head *plist, *phead;
226
227 spin_lock(&pframequeue->lock);
228
229 phead = get_list_head(pframequeue);
230 plist = phead->next;
231
232 while (phead != plist) {
233 hdr = container_of(plist, struct recv_frame, list);
234
235 plist = plist->next;
236
237 rtw_free_recvframe(hdr, pfree_recv_queue);
238 }
239
240 spin_unlock(&pframequeue->lock);
241
242 }
243
rtw_free_uc_swdec_pending_queue(struct adapter * adapter)244 u32 rtw_free_uc_swdec_pending_queue(struct adapter *adapter)
245 {
246 u32 cnt = 0;
247 struct recv_frame *pending_frame;
248 while ((pending_frame = rtw_alloc_recvframe(&adapter->recvpriv.uc_swdec_pending_queue))) {
249 rtw_free_recvframe(pending_frame, &adapter->recvpriv.free_recv_queue);
250 DBG_88E("%s: dequeue uc_swdec_pending_queue\n", __func__);
251 cnt++;
252 }
253
254 return cnt;
255 }
256
recvframe_chkmic(struct adapter * adapter,struct recv_frame * precvframe)257 static int recvframe_chkmic(struct adapter *adapter,
258 struct recv_frame *precvframe)
259 {
260 int i, res = _SUCCESS;
261 u32 datalen;
262 u8 miccode[8];
263 u8 bmic_err = false, brpt_micerror = true;
264 u8 *pframe, *payload, *pframemic;
265 u8 *mickey;
266 struct sta_info *stainfo;
267 struct rx_pkt_attrib *prxattrib = &precvframe->attrib;
268 struct security_priv *psecuritypriv = &adapter->securitypriv;
269
270 struct mlme_ext_priv *pmlmeext = &adapter->mlmeextpriv;
271 struct mlme_ext_info *pmlmeinfo = &(pmlmeext->mlmext_info);
272
273 stainfo = rtw_get_stainfo(&adapter->stapriv, &prxattrib->ta[0]);
274
275 if (prxattrib->encrypt == _TKIP_) {
276 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n recvframe_chkmic:prxattrib->encrypt==_TKIP_\n"));
277 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",
278 prxattrib->ra[0], prxattrib->ra[1], prxattrib->ra[2], prxattrib->ra[3], prxattrib->ra[4], prxattrib->ra[5]));
279
280 /* calculate mic code */
281 if (stainfo != NULL) {
282 if (IS_MCAST(prxattrib->ra)) {
283 if (!psecuritypriv) {
284 res = _FAIL;
285 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("\n recvframe_chkmic:didn't install group key!!!!!!!!!!\n"));
286 DBG_88E("\n recvframe_chkmic:didn't install group key!!!!!!!!!!\n");
287 goto exit;
288 }
289 mickey = &psecuritypriv->dot118021XGrprxmickey[prxattrib->key_index].skey[0];
290
291 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n recvframe_chkmic: bcmc key\n"));
292 } else {
293 mickey = &stainfo->dot11tkiprxmickey.skey[0];
294 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("\n recvframe_chkmic: unicast key\n"));
295 }
296
297 /* icv_len included the mic code */
298 datalen = precvframe->len-prxattrib->hdrlen -
299 prxattrib->iv_len-prxattrib->icv_len-8;
300 pframe = precvframe->rx_data;
301 payload = pframe+prxattrib->hdrlen+prxattrib->iv_len;
302
303 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n prxattrib->iv_len=%d prxattrib->icv_len=%d\n", prxattrib->iv_len, prxattrib->icv_len));
304 rtw_seccalctkipmic(mickey, pframe, payload, datalen, &miccode[0],
305 (unsigned char)prxattrib->priority); /* care the length of the data */
306
307 pframemic = payload+datalen;
308
309 bmic_err = false;
310
311 for (i = 0; i < 8; i++) {
312 if (miccode[i] != *(pframemic+i)) {
313 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
314 ("recvframe_chkmic:miccode[%d](%02x)!=*(pframemic+%d)(%02x) ",
315 i, miccode[i], i, *(pframemic+i)));
316 bmic_err = true;
317 }
318 }
319
320 if (bmic_err) {
321 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
322 ("\n *(pframemic-8)-*(pframemic-1)=0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x\n",
323 *(pframemic-8), *(pframemic-7), *(pframemic-6),
324 *(pframemic-5), *(pframemic-4), *(pframemic-3),
325 *(pframemic-2), *(pframemic-1)));
326 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
327 ("\n *(pframemic-16)-*(pframemic-9)=0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x\n",
328 *(pframemic-16), *(pframemic-15), *(pframemic-14),
329 *(pframemic-13), *(pframemic-12), *(pframemic-11),
330 *(pframemic-10), *(pframemic-9)));
331 {
332 uint i;
333 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
334 ("\n ======demp packet (len=%d)======\n",
335 precvframe->len));
336 for (i = 0; i < precvframe->len; i += 8) {
337 RT_TRACE(_module_rtl871x_recv_c_,
338 _drv_err_,
339 ("0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x",
340 *(precvframe->rx_data+i),
341 *(precvframe->rx_data+i+1),
342 *(precvframe->rx_data+i+2),
343 *(precvframe->rx_data+i+3),
344 *(precvframe->rx_data+i+4),
345 *(precvframe->rx_data+i+5),
346 *(precvframe->rx_data+i+6),
347 *(precvframe->rx_data+i+7)));
348 }
349 RT_TRACE(_module_rtl871x_recv_c_,
350 _drv_err_,
351 ("\n ====== demp packet end [len=%d]======\n",
352 precvframe->len));
353 RT_TRACE(_module_rtl871x_recv_c_,
354 _drv_err_,
355 ("\n hrdlen=%d,\n",
356 prxattrib->hdrlen));
357 }
358
359 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_,
360 ("ra=0x%.2x 0x%.2x 0x%.2x 0x%.2x 0x%.2x 0x%.2x psecuritypriv->binstallGrpkey=%d ",
361 prxattrib->ra[0], prxattrib->ra[1], prxattrib->ra[2],
362 prxattrib->ra[3], prxattrib->ra[4], prxattrib->ra[5], psecuritypriv->binstallGrpkey));
363
364 /* double check key_index for some timing issue , */
365 /* cannot compare with psecuritypriv->dot118021XGrpKeyid also cause timing issue */
366 if ((IS_MCAST(prxattrib->ra) == true) && (prxattrib->key_index != pmlmeinfo->key_index))
367 brpt_micerror = false;
368
369 if ((prxattrib->bdecrypted) && (brpt_micerror)) {
370 rtw_handle_tkip_mic_err(adapter, (u8)IS_MCAST(prxattrib->ra));
371 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" mic error :prxattrib->bdecrypted=%d ", prxattrib->bdecrypted));
372 DBG_88E(" mic error :prxattrib->bdecrypted=%d\n", prxattrib->bdecrypted);
373 } else {
374 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" mic error :prxattrib->bdecrypted=%d ", prxattrib->bdecrypted));
375 DBG_88E(" mic error :prxattrib->bdecrypted=%d\n", prxattrib->bdecrypted);
376 }
377 res = _FAIL;
378 } else {
379 /* mic checked ok */
380 if ((!psecuritypriv->bcheck_grpkey) && (IS_MCAST(prxattrib->ra))) {
381 psecuritypriv->bcheck_grpkey = true;
382 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("psecuritypriv->bcheck_grpkey = true"));
383 }
384 }
385 } else {
386 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("recvframe_chkmic: rtw_get_stainfo==NULL!!!\n"));
387 }
388
389 recvframe_pull_tail(precvframe, 8);
390 }
391
392 exit:
393
394 return res;
395 }
396
397 /* decrypt and set the ivlen, icvlen of the recv_frame */
decryptor(struct adapter * padapter,struct recv_frame * precv_frame)398 static struct recv_frame *decryptor(struct adapter *padapter,
399 struct recv_frame *precv_frame)
400 {
401 struct rx_pkt_attrib *prxattrib = &precv_frame->attrib;
402 struct security_priv *psecuritypriv = &padapter->securitypriv;
403 struct recv_frame *return_packet = precv_frame;
404 u32 res = _SUCCESS;
405
406 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("prxstat->decrypted=%x prxattrib->encrypt=0x%03x\n", prxattrib->bdecrypted, prxattrib->encrypt));
407
408 if (prxattrib->encrypt > 0) {
409 u8 *iv = precv_frame->rx_data+prxattrib->hdrlen;
410 prxattrib->key_index = (((iv[3])>>6)&0x3);
411
412 if (prxattrib->key_index > WEP_KEYS) {
413 DBG_88E("prxattrib->key_index(%d)>WEP_KEYS\n", prxattrib->key_index);
414
415 switch (prxattrib->encrypt) {
416 case _WEP40_:
417 case _WEP104_:
418 prxattrib->key_index = psecuritypriv->dot11PrivacyKeyIndex;
419 break;
420 case _TKIP_:
421 case _AES_:
422 default:
423 prxattrib->key_index = psecuritypriv->dot118021XGrpKeyid;
424 break;
425 }
426 }
427 }
428
429 if ((prxattrib->encrypt > 0) && ((prxattrib->bdecrypted == 0) || (psecuritypriv->sw_decrypt))) {
430 psecuritypriv->hw_decrypted = false;
431
432 switch (prxattrib->encrypt) {
433 case _WEP40_:
434 case _WEP104_:
435 rtw_wep_decrypt(padapter, (u8 *)precv_frame);
436 break;
437 case _TKIP_:
438 res = rtw_tkip_decrypt(padapter, (u8 *)precv_frame);
439 break;
440 case _AES_:
441 res = rtw_aes_decrypt(padapter, (u8 *)precv_frame);
442 break;
443 default:
444 break;
445 }
446 } else if (prxattrib->bdecrypted == 1 && prxattrib->encrypt > 0 &&
447 (psecuritypriv->busetkipkey == 1 || prxattrib->encrypt != _TKIP_))
448 psecuritypriv->hw_decrypted = true;
449
450 if (res == _FAIL) {
451 rtw_free_recvframe(return_packet, &padapter->recvpriv.free_recv_queue);
452 return_packet = NULL;
453 }
454
455 return return_packet;
456 }
457
458 /* set the security information in the recv_frame */
portctrl(struct adapter * adapter,struct recv_frame * precv_frame)459 static struct recv_frame *portctrl(struct adapter *adapter,
460 struct recv_frame *precv_frame)
461 {
462 u8 *psta_addr, *ptr;
463 uint auth_alg;
464 struct recv_frame *pfhdr;
465 struct sta_info *psta;
466 struct sta_priv *pstapriv;
467 struct recv_frame *prtnframe;
468 u16 ether_type;
469 u16 eapol_type = 0x888e;/* for Funia BD's WPA issue */
470 struct rx_pkt_attrib *pattrib;
471 __be16 be_tmp;
472
473 pstapriv = &adapter->stapriv;
474
475 auth_alg = adapter->securitypriv.dot11AuthAlgrthm;
476
477 ptr = precv_frame->rx_data;
478 pfhdr = precv_frame;
479 pattrib = &pfhdr->attrib;
480 psta_addr = pattrib->ta;
481 psta = rtw_get_stainfo(pstapriv, psta_addr);
482
483 prtnframe = NULL;
484
485 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########portctrl:adapter->securitypriv.dot11AuthAlgrthm=%d\n", adapter->securitypriv.dot11AuthAlgrthm));
486
487 if (auth_alg == 2) {
488 /* get ether_type */
489 ptr = ptr + pfhdr->attrib.hdrlen + LLC_HEADER_SIZE;
490 memcpy(&be_tmp, ptr, 2);
491 ether_type = ntohs(be_tmp);
492
493 if ((psta != NULL) && (psta->ieee8021x_blocked)) {
494 /* blocked */
495 /* only accept EAPOL frame */
496 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########portctrl:psta->ieee8021x_blocked==1\n"));
497
498 if (ether_type == eapol_type) {
499 prtnframe = precv_frame;
500 } else {
501 /* free this frame */
502 rtw_free_recvframe(precv_frame, &adapter->recvpriv.free_recv_queue);
503 prtnframe = NULL;
504 }
505 } else {
506 /* allowed */
507 /* check decryption status, and decrypt the frame if needed */
508 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########portctrl:psta->ieee8021x_blocked==0\n"));
509 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
510 ("portctrl:precv_frame->hdr.attrib.privacy=%x\n",
511 precv_frame->attrib.privacy));
512
513 if (pattrib->bdecrypted == 0)
514 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("portctrl:prxstat->decrypted=%x\n", pattrib->bdecrypted));
515
516 prtnframe = precv_frame;
517 /* check is the EAPOL frame or not (Rekey) */
518 if (ether_type == eapol_type) {
519 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("########portctrl:ether_type==0x888e\n"));
520 /* check Rekey */
521
522 prtnframe = precv_frame;
523 } else {
524 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("########portctrl:ether_type=0x%04x\n", ether_type));
525 }
526 }
527 } else {
528 prtnframe = precv_frame;
529 }
530
531 return prtnframe;
532 }
533
recv_decache(struct recv_frame * precv_frame,u8 bretry,struct stainfo_rxcache * prxcache)534 static int recv_decache(struct recv_frame *precv_frame, u8 bretry,
535 struct stainfo_rxcache *prxcache)
536 {
537 int tid = precv_frame->attrib.priority;
538
539 u16 seq_ctrl = ((precv_frame->attrib.seq_num&0xffff) << 4) |
540 (precv_frame->attrib.frag_num & 0xf);
541
542 if (tid > 15) {
543 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("recv_decache, (tid>15)! seq_ctrl=0x%x, tid=0x%x\n", seq_ctrl, tid));
544
545 return _FAIL;
546 }
547
548 if (1) {/* if (bretry) */
549 if (seq_ctrl == prxcache->tid_rxseq[tid]) {
550 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]));
551
552 return _FAIL;
553 }
554 }
555
556 prxcache->tid_rxseq[tid] = seq_ctrl;
557
558 return _SUCCESS;
559 }
560
process_pwrbit_data(struct adapter * padapter,struct recv_frame * precv_frame)561 static void process_pwrbit_data(struct adapter *padapter,
562 struct recv_frame *precv_frame)
563 {
564 #ifdef CONFIG_88EU_AP_MODE
565 unsigned char pwrbit;
566 u8 *ptr = precv_frame->rx_data;
567 struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
568 struct sta_priv *pstapriv = &padapter->stapriv;
569 struct sta_info *psta = NULL;
570
571 psta = rtw_get_stainfo(pstapriv, pattrib->src);
572
573 pwrbit = GetPwrMgt(ptr);
574
575 if (psta) {
576 if (pwrbit) {
577 if (!(psta->state & WIFI_SLEEP_STATE))
578 stop_sta_xmit(padapter, psta);
579 } else {
580 if (psta->state & WIFI_SLEEP_STATE)
581 wakeup_sta_to_xmit(padapter, psta);
582 }
583 }
584
585 #endif
586 }
587
process_wmmps_data(struct adapter * padapter,struct recv_frame * precv_frame)588 static void process_wmmps_data(struct adapter *padapter,
589 struct recv_frame *precv_frame)
590 {
591 #ifdef CONFIG_88EU_AP_MODE
592 struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
593 struct sta_priv *pstapriv = &padapter->stapriv;
594 struct sta_info *psta = NULL;
595
596 psta = rtw_get_stainfo(pstapriv, pattrib->src);
597
598 if (!psta)
599 return;
600
601 if (!psta->qos_option)
602 return;
603
604 if (!(psta->qos_info&0xf))
605 return;
606
607 if (psta->state&WIFI_SLEEP_STATE) {
608 u8 wmmps_ac = 0;
609
610 switch (pattrib->priority) {
611 case 1:
612 case 2:
613 wmmps_ac = psta->uapsd_bk&BIT(1);
614 break;
615 case 4:
616 case 5:
617 wmmps_ac = psta->uapsd_vi&BIT(1);
618 break;
619 case 6:
620 case 7:
621 wmmps_ac = psta->uapsd_vo&BIT(1);
622 break;
623 case 0:
624 case 3:
625 default:
626 wmmps_ac = psta->uapsd_be&BIT(1);
627 break;
628 }
629
630 if (wmmps_ac) {
631 if (psta->sleepq_ac_len > 0) {
632 /* process received triggered frame */
633 xmit_delivery_enabled_frames(padapter, psta);
634 } else {
635 /* issue one qos null frame with More data bit = 0 and the EOSP bit set (= 1) */
636 issue_qos_nulldata(padapter, psta->hwaddr, (u16)pattrib->priority, 0, 0);
637 }
638 }
639 }
640
641 #endif
642 }
643
count_rx_stats(struct adapter * padapter,struct recv_frame * prframe,struct sta_info * sta)644 static void count_rx_stats(struct adapter *padapter,
645 struct recv_frame *prframe,
646 struct sta_info *sta)
647 {
648 int sz;
649 struct sta_info *psta = NULL;
650 struct stainfo_stats *pstats = NULL;
651 struct rx_pkt_attrib *pattrib = &prframe->attrib;
652 struct recv_priv *precvpriv = &padapter->recvpriv;
653
654 sz = prframe->len;
655 precvpriv->rx_bytes += sz;
656
657 padapter->mlmepriv.LinkDetectInfo.NumRxOkInPeriod++;
658
659 if ((!MacAddr_isBcst(pattrib->dst)) && (!IS_MCAST(pattrib->dst)))
660 padapter->mlmepriv.LinkDetectInfo.NumRxUnicastOkInPeriod++;
661
662 if (sta)
663 psta = sta;
664 else
665 psta = prframe->psta;
666
667 if (psta) {
668 pstats = &psta->sta_stats;
669
670 pstats->rx_data_pkts++;
671 pstats->rx_bytes += sz;
672 }
673 }
674
675 int sta2sta_data_frame(
676 struct adapter *adapter,
677 struct recv_frame *precv_frame,
678 struct sta_info **psta
679 );
680
sta2sta_data_frame(struct adapter * adapter,struct recv_frame * precv_frame,struct sta_info ** psta)681 int sta2sta_data_frame(struct adapter *adapter, struct recv_frame *precv_frame,
682 struct sta_info **psta)
683 {
684 u8 *ptr = precv_frame->rx_data;
685 int ret = _SUCCESS;
686 struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
687 struct sta_priv *pstapriv = &adapter->stapriv;
688 struct mlme_priv *pmlmepriv = &adapter->mlmepriv;
689 u8 *mybssid = get_bssid(pmlmepriv);
690 u8 *myhwaddr = myid(&adapter->eeprompriv);
691 u8 *sta_addr = NULL;
692 int bmcast = IS_MCAST(pattrib->dst);
693
694 if ((check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) == true) ||
695 (check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE) == true)) {
696 /* filter packets that SA is myself or multicast or broadcast */
697 if (!memcmp(myhwaddr, pattrib->src, ETH_ALEN)) {
698 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" SA==myself\n"));
699 ret = _FAIL;
700 goto exit;
701 }
702
703 if ((memcmp(myhwaddr, pattrib->dst, ETH_ALEN)) && (!bmcast)) {
704 ret = _FAIL;
705 goto exit;
706 }
707
708 if (!memcmp(pattrib->bssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
709 !memcmp(mybssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
710 memcmp(pattrib->bssid, mybssid, ETH_ALEN)) {
711 ret = _FAIL;
712 goto exit;
713 }
714
715 sta_addr = pattrib->src;
716 } else if (check_fwstate(pmlmepriv, WIFI_STATION_STATE)) {
717 /* For Station mode, sa and bssid should always be BSSID, and DA is my mac-address */
718 if (memcmp(pattrib->bssid, pattrib->src, ETH_ALEN)) {
719 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("bssid!=TA under STATION_MODE; drop pkt\n"));
720 ret = _FAIL;
721 goto exit;
722 }
723 sta_addr = pattrib->bssid;
724 } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
725 if (bmcast) {
726 /* For AP mode, if DA == MCAST, then BSSID should be also MCAST */
727 if (!IS_MCAST(pattrib->bssid)) {
728 ret = _FAIL;
729 goto exit;
730 }
731 } else { /* not mc-frame */
732 /* For AP mode, if DA is non-MCAST, then it must be BSSID, and bssid == BSSID */
733 if (memcmp(pattrib->bssid, pattrib->dst, ETH_ALEN)) {
734 ret = _FAIL;
735 goto exit;
736 }
737
738 sta_addr = pattrib->src;
739 }
740 } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) {
741 memcpy(pattrib->dst, GetAddr1Ptr(ptr), ETH_ALEN);
742 memcpy(pattrib->src, GetAddr2Ptr(ptr), ETH_ALEN);
743 memcpy(pattrib->bssid, GetAddr3Ptr(ptr), ETH_ALEN);
744 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
745 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
746
747 sta_addr = mybssid;
748 } else {
749 ret = _FAIL;
750 }
751
752 if (bmcast)
753 *psta = rtw_get_bcmc_stainfo(adapter);
754 else
755 *psta = rtw_get_stainfo(pstapriv, sta_addr); /* get ap_info */
756
757 if (*psta == NULL) {
758 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("can't get psta under sta2sta_data_frame ; drop pkt\n"));
759 ret = _FAIL;
760 goto exit;
761 }
762
763 exit:
764 return ret;
765 }
766
ap2sta_data_frame(struct adapter * adapter,struct recv_frame * precv_frame,struct sta_info ** psta)767 static int ap2sta_data_frame(
768 struct adapter *adapter,
769 struct recv_frame *precv_frame,
770 struct sta_info **psta)
771 {
772 u8 *ptr = precv_frame->rx_data;
773 struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
774 int ret = _SUCCESS;
775 struct sta_priv *pstapriv = &adapter->stapriv;
776 struct mlme_priv *pmlmepriv = &adapter->mlmepriv;
777 u8 *mybssid = get_bssid(pmlmepriv);
778 u8 *myhwaddr = myid(&adapter->eeprompriv);
779 int bmcast = IS_MCAST(pattrib->dst);
780
781 if ((check_fwstate(pmlmepriv, WIFI_STATION_STATE) == true) &&
782 (check_fwstate(pmlmepriv, _FW_LINKED) == true ||
783 check_fwstate(pmlmepriv, _FW_UNDER_LINKING))) {
784 /* filter packets that SA is myself or multicast or broadcast */
785 if (!memcmp(myhwaddr, pattrib->src, ETH_ALEN)) {
786 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" SA==myself\n"));
787 ret = _FAIL;
788 goto exit;
789 }
790
791 /* da should be for me */
792 if ((memcmp(myhwaddr, pattrib->dst, ETH_ALEN)) && (!bmcast)) {
793 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
794 (" ap2sta_data_frame: compare DA fail; DA=%pM\n", (pattrib->dst)));
795 ret = _FAIL;
796 goto exit;
797 }
798
799 /* check BSSID */
800 if (!memcmp(pattrib->bssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
801 !memcmp(mybssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) ||
802 (memcmp(pattrib->bssid, mybssid, ETH_ALEN))) {
803 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
804 (" ap2sta_data_frame: compare BSSID fail ; BSSID=%pM\n", (pattrib->bssid)));
805 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("mybssid=%pM\n", (mybssid)));
806
807 if (!bmcast) {
808 DBG_88E("issue_deauth to the nonassociated ap=%pM for the reason(7)\n", (pattrib->bssid));
809 issue_deauth(adapter, pattrib->bssid, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
810 }
811
812 ret = _FAIL;
813 goto exit;
814 }
815
816 if (bmcast)
817 *psta = rtw_get_bcmc_stainfo(adapter);
818 else
819 *psta = rtw_get_stainfo(pstapriv, pattrib->bssid); /* get ap_info */
820
821 if (*psta == NULL) {
822 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("ap2sta: can't get psta under STATION_MODE ; drop pkt\n"));
823 ret = _FAIL;
824 goto exit;
825 }
826
827 /* if ((GetFrameSubType(ptr) & WIFI_QOS_DATA_TYPE) == WIFI_QOS_DATA_TYPE) { */
828 /* */
829
830 if (GetFrameSubType(ptr) & BIT(6)) {
831 /* No data, will not indicate to upper layer, temporily count it here */
832 count_rx_stats(adapter, precv_frame, *psta);
833 ret = RTW_RX_HANDLED;
834 goto exit;
835 }
836 } else if ((check_fwstate(pmlmepriv, WIFI_MP_STATE) == true) &&
837 (check_fwstate(pmlmepriv, _FW_LINKED) == true)) {
838 memcpy(pattrib->dst, GetAddr1Ptr(ptr), ETH_ALEN);
839 memcpy(pattrib->src, GetAddr2Ptr(ptr), ETH_ALEN);
840 memcpy(pattrib->bssid, GetAddr3Ptr(ptr), ETH_ALEN);
841 memcpy(pattrib->ra, pattrib->dst, ETH_ALEN);
842 memcpy(pattrib->ta, pattrib->src, ETH_ALEN);
843
844 /* */
845 memcpy(pattrib->bssid, mybssid, ETH_ALEN);
846
847 *psta = rtw_get_stainfo(pstapriv, pattrib->bssid); /* get sta_info */
848 if (*psta == NULL) {
849 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("can't get psta under MP_MODE ; drop pkt\n"));
850 ret = _FAIL;
851 goto exit;
852 }
853 } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) {
854 /* Special case */
855 ret = RTW_RX_HANDLED;
856 goto exit;
857 } else {
858 if (!memcmp(myhwaddr, pattrib->dst, ETH_ALEN) && (!bmcast)) {
859 *psta = rtw_get_stainfo(pstapriv, pattrib->bssid); /* get sta_info */
860 if (*psta == NULL) {
861 DBG_88E("issue_deauth to the ap =%pM for the reason(7)\n", (pattrib->bssid));
862
863 issue_deauth(adapter, pattrib->bssid, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
864 }
865 }
866
867 ret = _FAIL;
868 }
869
870 exit:
871
872 return ret;
873 }
874
sta2ap_data_frame(struct adapter * adapter,struct recv_frame * precv_frame,struct sta_info ** psta)875 static int sta2ap_data_frame(struct adapter *adapter,
876 struct recv_frame *precv_frame,
877 struct sta_info **psta)
878 {
879 struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
880 struct sta_priv *pstapriv = &adapter->stapriv;
881 struct mlme_priv *pmlmepriv = &adapter->mlmepriv;
882 u8 *ptr = precv_frame->rx_data;
883 unsigned char *mybssid = get_bssid(pmlmepriv);
884 int ret = _SUCCESS;
885
886 if (check_fwstate(pmlmepriv, WIFI_AP_STATE) == true) {
887 /* For AP mode, RA = BSSID, TX = STA(SRC_ADDR), A3 = DST_ADDR */
888 if (memcmp(pattrib->bssid, mybssid, ETH_ALEN)) {
889 ret = _FAIL;
890 goto exit;
891 }
892
893 *psta = rtw_get_stainfo(pstapriv, pattrib->src);
894 if (*psta == NULL) {
895 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("can't get psta under AP_MODE; drop pkt\n"));
896 DBG_88E("issue_deauth to sta=%pM for the reason(7)\n", (pattrib->src));
897
898 issue_deauth(adapter, pattrib->src, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
899
900 ret = RTW_RX_HANDLED;
901 goto exit;
902 }
903
904 process_pwrbit_data(adapter, precv_frame);
905
906 if ((GetFrameSubType(ptr) & WIFI_QOS_DATA_TYPE) == WIFI_QOS_DATA_TYPE)
907 process_wmmps_data(adapter, precv_frame);
908
909 if (GetFrameSubType(ptr) & BIT(6)) {
910 /* No data, will not indicate to upper layer, temporily count it here */
911 count_rx_stats(adapter, precv_frame, *psta);
912 ret = RTW_RX_HANDLED;
913 goto exit;
914 }
915 } else {
916 u8 *myhwaddr = myid(&adapter->eeprompriv);
917 if (memcmp(pattrib->ra, myhwaddr, ETH_ALEN)) {
918 ret = RTW_RX_HANDLED;
919 goto exit;
920 }
921 DBG_88E("issue_deauth to sta=%pM for the reason(7)\n", (pattrib->src));
922 issue_deauth(adapter, pattrib->src, WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
923 ret = RTW_RX_HANDLED;
924 goto exit;
925 }
926
927 exit:
928
929 return ret;
930 }
931
validate_recv_ctrl_frame(struct adapter * padapter,struct recv_frame * precv_frame)932 static int validate_recv_ctrl_frame(struct adapter *padapter,
933 struct recv_frame *precv_frame)
934 {
935 #ifdef CONFIG_88EU_AP_MODE
936 struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
937 struct sta_priv *pstapriv = &padapter->stapriv;
938 u8 *pframe = precv_frame->rx_data;
939
940 if (GetFrameType(pframe) != WIFI_CTRL_TYPE)
941 return _FAIL;
942
943 /* receive the frames that ra(a1) is my address */
944 if (memcmp(GetAddr1Ptr(pframe), myid(&padapter->eeprompriv), ETH_ALEN))
945 return _FAIL;
946
947 /* only handle ps-poll */
948 if (GetFrameSubType(pframe) == WIFI_PSPOLL) {
949 u16 aid;
950 u8 wmmps_ac = 0;
951 struct sta_info *psta = NULL;
952
953 aid = GetAid(pframe);
954 psta = rtw_get_stainfo(pstapriv, GetAddr2Ptr(pframe));
955
956 if ((psta == NULL) || (psta->aid != aid))
957 return _FAIL;
958
959 /* for rx pkt statistics */
960 psta->sta_stats.rx_ctrl_pkts++;
961
962 switch (pattrib->priority) {
963 case 1:
964 case 2:
965 wmmps_ac = psta->uapsd_bk&BIT(0);
966 break;
967 case 4:
968 case 5:
969 wmmps_ac = psta->uapsd_vi&BIT(0);
970 break;
971 case 6:
972 case 7:
973 wmmps_ac = psta->uapsd_vo&BIT(0);
974 break;
975 case 0:
976 case 3:
977 default:
978 wmmps_ac = psta->uapsd_be&BIT(0);
979 break;
980 }
981
982 if (wmmps_ac)
983 return _FAIL;
984
985 if (psta->state & WIFI_STA_ALIVE_CHK_STATE) {
986 DBG_88E("%s alive check-rx ps-poll\n", __func__);
987 psta->expire_to = pstapriv->expire_to;
988 psta->state ^= WIFI_STA_ALIVE_CHK_STATE;
989 }
990
991 if ((psta->state&WIFI_SLEEP_STATE) && (pstapriv->sta_dz_bitmap&BIT(psta->aid))) {
992 struct list_head *xmitframe_plist, *xmitframe_phead;
993 struct xmit_frame *pxmitframe = NULL;
994
995 spin_lock_bh(&psta->sleep_q.lock);
996
997 xmitframe_phead = get_list_head(&psta->sleep_q);
998 xmitframe_plist = xmitframe_phead->next;
999
1000 if (xmitframe_phead != xmitframe_plist) {
1001 pxmitframe = container_of(xmitframe_plist, struct xmit_frame, list);
1002
1003 xmitframe_plist = xmitframe_plist->next;
1004
1005 list_del_init(&pxmitframe->list);
1006
1007 psta->sleepq_len--;
1008
1009 if (psta->sleepq_len > 0)
1010 pxmitframe->attrib.mdata = 1;
1011 else
1012 pxmitframe->attrib.mdata = 0;
1013
1014 pxmitframe->attrib.triggered = 1;
1015
1016 spin_unlock_bh(&psta->sleep_q.lock);
1017 if (rtw_hal_xmit(padapter, pxmitframe) == true)
1018 rtw_os_xmit_complete(padapter, pxmitframe);
1019 spin_lock_bh(&psta->sleep_q.lock);
1020
1021 if (psta->sleepq_len == 0) {
1022 pstapriv->tim_bitmap &= ~BIT(psta->aid);
1023
1024 /* update BCN for TIM IE */
1025 /* update_BCNTIM(padapter); */
1026 update_beacon(padapter, _TIM_IE_, NULL, false);
1027 }
1028 } else {
1029 if (pstapriv->tim_bitmap&BIT(psta->aid)) {
1030 if (psta->sleepq_len == 0) {
1031 DBG_88E("no buffered packets to xmit\n");
1032
1033 /* issue nulldata with More data bit = 0 to indicate we have no buffered packets */
1034 issue_nulldata(padapter, psta->hwaddr, 0, 0, 0);
1035 } else {
1036 DBG_88E("error!psta->sleepq_len=%d\n", psta->sleepq_len);
1037 psta->sleepq_len = 0;
1038 }
1039
1040 pstapriv->tim_bitmap &= ~BIT(psta->aid);
1041
1042 /* update BCN for TIM IE */
1043 /* update_BCNTIM(padapter); */
1044 update_beacon(padapter, _TIM_IE_, NULL, false);
1045 }
1046 }
1047
1048 spin_unlock_bh(&psta->sleep_q.lock);
1049 }
1050 }
1051
1052 #endif
1053
1054 return _FAIL;
1055 }
1056
1057 struct recv_frame *recvframe_chk_defrag(struct adapter *padapter,
1058 struct recv_frame *precv_frame);
1059
validate_recv_mgnt_frame(struct adapter * padapter,struct recv_frame * precv_frame)1060 static int validate_recv_mgnt_frame(struct adapter *padapter,
1061 struct recv_frame *precv_frame)
1062 {
1063 struct sta_info *psta;
1064
1065 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("+validate_recv_mgnt_frame\n"));
1066
1067 precv_frame = recvframe_chk_defrag(padapter, precv_frame);
1068 if (precv_frame == NULL) {
1069 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("%s: fragment packet\n", __func__));
1070 return _SUCCESS;
1071 }
1072
1073 /* for rx pkt statistics */
1074 psta = rtw_get_stainfo(&padapter->stapriv,
1075 GetAddr2Ptr(precv_frame->rx_data));
1076 if (psta) {
1077 psta->sta_stats.rx_mgnt_pkts++;
1078 if (GetFrameSubType(precv_frame->rx_data) == WIFI_BEACON) {
1079 psta->sta_stats.rx_beacon_pkts++;
1080 } else if (GetFrameSubType(precv_frame->rx_data) == WIFI_PROBEREQ) {
1081 psta->sta_stats.rx_probereq_pkts++;
1082 } else if (GetFrameSubType(precv_frame->rx_data) == WIFI_PROBERSP) {
1083 if (!memcmp(padapter->eeprompriv.mac_addr,
1084 GetAddr1Ptr(precv_frame->rx_data), ETH_ALEN))
1085 psta->sta_stats.rx_probersp_pkts++;
1086 else if (is_broadcast_mac_addr(GetAddr1Ptr(precv_frame->rx_data)) ||
1087 is_multicast_mac_addr(GetAddr1Ptr(precv_frame->rx_data)))
1088 psta->sta_stats.rx_probersp_bm_pkts++;
1089 else
1090 psta->sta_stats.rx_probersp_uo_pkts++;
1091 }
1092 }
1093
1094 mgt_dispatcher(padapter, precv_frame);
1095
1096 return _SUCCESS;
1097 }
1098
validate_recv_data_frame(struct adapter * adapter,struct recv_frame * precv_frame)1099 static int validate_recv_data_frame(struct adapter *adapter,
1100 struct recv_frame *precv_frame)
1101 {
1102 u8 bretry;
1103 u8 *psa, *pda, *pbssid;
1104 struct sta_info *psta = NULL;
1105 u8 *ptr = precv_frame->rx_data;
1106 struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
1107 struct security_priv *psecuritypriv = &adapter->securitypriv;
1108 int ret = _SUCCESS;
1109
1110 bretry = GetRetry(ptr);
1111 pda = get_da(ptr);
1112 psa = get_sa(ptr);
1113 pbssid = get_hdr_bssid(ptr);
1114
1115 if (pbssid == NULL) {
1116 ret = _FAIL;
1117 goto exit;
1118 }
1119
1120 memcpy(pattrib->dst, pda, ETH_ALEN);
1121 memcpy(pattrib->src, psa, ETH_ALEN);
1122
1123 memcpy(pattrib->bssid, pbssid, ETH_ALEN);
1124
1125 switch (pattrib->to_fr_ds) {
1126 case 0:
1127 memcpy(pattrib->ra, pda, ETH_ALEN);
1128 memcpy(pattrib->ta, psa, ETH_ALEN);
1129 ret = sta2sta_data_frame(adapter, precv_frame, &psta);
1130 break;
1131 case 1:
1132 memcpy(pattrib->ra, pda, ETH_ALEN);
1133 memcpy(pattrib->ta, pbssid, ETH_ALEN);
1134 ret = ap2sta_data_frame(adapter, precv_frame, &psta);
1135 break;
1136 case 2:
1137 memcpy(pattrib->ra, pbssid, ETH_ALEN);
1138 memcpy(pattrib->ta, psa, ETH_ALEN);
1139 ret = sta2ap_data_frame(adapter, precv_frame, &psta);
1140 break;
1141 case 3:
1142 memcpy(pattrib->ra, GetAddr1Ptr(ptr), ETH_ALEN);
1143 memcpy(pattrib->ta, GetAddr2Ptr(ptr), ETH_ALEN);
1144 ret = _FAIL;
1145 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" case 3\n"));
1146 break;
1147 default:
1148 ret = _FAIL;
1149 break;
1150 }
1151
1152 if (ret == _FAIL) {
1153 goto exit;
1154 } else if (ret == RTW_RX_HANDLED) {
1155 goto exit;
1156 }
1157
1158 if (psta == NULL) {
1159 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, (" after to_fr_ds_chk; psta==NULL\n"));
1160 ret = _FAIL;
1161 goto exit;
1162 }
1163
1164 /* psta->rssi = prxcmd->rssi; */
1165 /* psta->signal_quality = prxcmd->sq; */
1166 precv_frame->psta = psta;
1167
1168 pattrib->amsdu = 0;
1169 pattrib->ack_policy = 0;
1170 /* parsing QC field */
1171 if (pattrib->qos == 1) {
1172 pattrib->priority = GetPriority((ptr + 24));
1173 pattrib->ack_policy = GetAckpolicy((ptr + 24));
1174 pattrib->amsdu = GetAMsdu((ptr + 24));
1175 pattrib->hdrlen = pattrib->to_fr_ds == 3 ? 32 : 26;
1176
1177 if (pattrib->priority != 0 && pattrib->priority != 3)
1178 adapter->recvpriv.bIsAnyNonBEPkts = true;
1179 } else {
1180 pattrib->priority = 0;
1181 pattrib->hdrlen = pattrib->to_fr_ds == 3 ? 30 : 24;
1182 }
1183
1184 if (pattrib->order)/* HT-CTRL 11n */
1185 pattrib->hdrlen += 4;
1186
1187 precv_frame->preorder_ctrl = &psta->recvreorder_ctrl[pattrib->priority];
1188
1189 /* decache, drop duplicate recv packets */
1190 if (recv_decache(precv_frame, bretry, &psta->sta_recvpriv.rxcache) == _FAIL) {
1191 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("decache : drop pkt\n"));
1192 ret = _FAIL;
1193 goto exit;
1194 }
1195
1196 if (pattrib->privacy) {
1197 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("validate_recv_data_frame:pattrib->privacy=%x\n", pattrib->privacy));
1198 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)));
1199
1200 GET_ENCRY_ALGO(psecuritypriv, psta, pattrib->encrypt, IS_MCAST(pattrib->ra));
1201
1202 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("\n pattrib->encrypt=%d\n", pattrib->encrypt));
1203
1204 SET_ICE_IV_LEN(pattrib->iv_len, pattrib->icv_len, pattrib->encrypt);
1205 } else {
1206 pattrib->encrypt = 0;
1207 pattrib->iv_len = 0;
1208 pattrib->icv_len = 0;
1209 }
1210
1211 exit:
1212
1213 return ret;
1214 }
1215
validate_recv_frame(struct adapter * adapter,struct recv_frame * precv_frame)1216 static int validate_recv_frame(struct adapter *adapter,
1217 struct recv_frame *precv_frame)
1218 {
1219 /* shall check frame subtype, to / from ds, da, bssid */
1220
1221 /* then call check if rx seq/frag. duplicated. */
1222
1223 u8 type;
1224 u8 subtype;
1225 int retval = _SUCCESS;
1226 u8 bDumpRxPkt;
1227 struct rx_pkt_attrib *pattrib = &precv_frame->attrib;
1228 u8 *ptr = precv_frame->rx_data;
1229 u8 ver = (unsigned char)(*ptr)&0x3;
1230 struct mlme_ext_priv *pmlmeext = &adapter->mlmeextpriv;
1231
1232 if (pmlmeext->sitesurvey_res.state == SCAN_PROCESS) {
1233 int ch_set_idx = rtw_ch_set_search_ch(pmlmeext->channel_set, rtw_get_oper_ch(adapter));
1234 if (ch_set_idx >= 0)
1235 pmlmeext->channel_set[ch_set_idx].rx_count++;
1236 }
1237
1238 /* add version chk */
1239 if (ver != 0) {
1240 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("validate_recv_data_frame fail! (ver!=0)\n"));
1241 retval = _FAIL;
1242 goto exit;
1243 }
1244
1245 type = GetFrameType(ptr);
1246 subtype = GetFrameSubType(ptr); /* bit(7)~bit(2) */
1247
1248 pattrib->to_fr_ds = get_tofr_ds(ptr);
1249
1250 pattrib->frag_num = GetFragNum(ptr);
1251 pattrib->seq_num = GetSequence(ptr);
1252
1253 pattrib->pw_save = GetPwrMgt(ptr);
1254 pattrib->mfrag = GetMFrag(ptr);
1255 pattrib->mdata = GetMData(ptr);
1256 pattrib->privacy = GetPrivacy(ptr);
1257 pattrib->order = GetOrder(ptr);
1258
1259 /* Dump rx packets */
1260 rtw_hal_get_def_var(adapter, HAL_DEF_DBG_DUMP_RXPKT, &(bDumpRxPkt));
1261 if (bDumpRxPkt == 1) {/* dump all rx packets */
1262 if (_drv_err_ <= GlobalDebugLevel) {
1263 pr_info(DRIVER_PREFIX "#############################\n");
1264 print_hex_dump(KERN_INFO, DRIVER_PREFIX, DUMP_PREFIX_NONE,
1265 16, 1, ptr, 64, false);
1266 pr_info(DRIVER_PREFIX "#############################\n");
1267 }
1268 } else if (bDumpRxPkt == 2) {
1269 if ((_drv_err_ <= GlobalDebugLevel) && (type == WIFI_MGT_TYPE)) {
1270 pr_info(DRIVER_PREFIX "#############################\n");
1271 print_hex_dump(KERN_INFO, DRIVER_PREFIX, DUMP_PREFIX_NONE,
1272 16, 1, ptr, 64, false);
1273 pr_info(DRIVER_PREFIX "#############################\n");
1274 }
1275 } else if (bDumpRxPkt == 3) {
1276 if ((_drv_err_ <= GlobalDebugLevel) && (type == WIFI_DATA_TYPE)) {
1277 pr_info(DRIVER_PREFIX "#############################\n");
1278 print_hex_dump(KERN_INFO, DRIVER_PREFIX, DUMP_PREFIX_NONE,
1279 16, 1, ptr, 64, false);
1280 pr_info(DRIVER_PREFIX "#############################\n");
1281 }
1282 }
1283 switch (type) {
1284 case WIFI_MGT_TYPE: /* mgnt */
1285 retval = validate_recv_mgnt_frame(adapter, precv_frame);
1286 if (retval == _FAIL)
1287 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("validate_recv_mgnt_frame fail\n"));
1288 retval = _FAIL; /* only data frame return _SUCCESS */
1289 break;
1290 case WIFI_CTRL_TYPE: /* ctrl */
1291 retval = validate_recv_ctrl_frame(adapter, precv_frame);
1292 if (retval == _FAIL)
1293 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("validate_recv_ctrl_frame fail\n"));
1294 retval = _FAIL; /* only data frame return _SUCCESS */
1295 break;
1296 case WIFI_DATA_TYPE: /* data */
1297 rtw_led_control(adapter, LED_CTL_RX);
1298 pattrib->qos = (subtype & BIT(7)) ? 1 : 0;
1299 retval = validate_recv_data_frame(adapter, precv_frame);
1300 if (retval == _FAIL) {
1301 struct recv_priv *precvpriv = &adapter->recvpriv;
1302 precvpriv->rx_drop++;
1303 }
1304 break;
1305 default:
1306 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("validate_recv_data_frame fail! type= 0x%x\n", type));
1307 retval = _FAIL;
1308 break;
1309 }
1310
1311 /*
1312 * This is the last moment before management and control frames get
1313 * discarded. So we need to forward them to the monitor now or never.
1314 *
1315 * At the same time data frames can still be encrypted if software
1316 * decryption is in use. However, decryption can occur not until later
1317 * (see recv_func()).
1318 *
1319 * Hence forward the frame to the monitor anyway to preserve the order
1320 * in which frames were received.
1321 */
1322 rtl88eu_mon_recv_hook(adapter->pmondev, precv_frame);
1323
1324 exit:
1325
1326 return retval;
1327 }
1328
1329 /* remove the wlanhdr and add the eth_hdr */
1330
wlanhdr_to_ethhdr(struct recv_frame * precvframe)1331 static int wlanhdr_to_ethhdr(struct recv_frame *precvframe)
1332 {
1333 int rmv_len;
1334 u16 eth_type, len;
1335 __be16 be_tmp;
1336 u8 bsnaphdr;
1337 u8 *psnap_type;
1338 struct ieee80211_snap_hdr *psnap;
1339
1340 struct adapter *adapter = precvframe->adapter;
1341 struct mlme_priv *pmlmepriv = &adapter->mlmepriv;
1342 u8 *ptr = precvframe->rx_data;
1343 struct rx_pkt_attrib *pattrib = &precvframe->attrib;
1344
1345 if (pattrib->encrypt)
1346 recvframe_pull_tail(precvframe, pattrib->icv_len);
1347
1348 psnap = (struct ieee80211_snap_hdr *)(ptr+pattrib->hdrlen + pattrib->iv_len);
1349 psnap_type = ptr+pattrib->hdrlen + pattrib->iv_len+SNAP_SIZE;
1350 /* convert hdr + possible LLC headers into Ethernet header */
1351 if ((!memcmp(psnap, rtw_rfc1042_header, SNAP_SIZE) &&
1352 (!memcmp(psnap_type, SNAP_ETH_TYPE_IPX, 2) == false) &&
1353 (!memcmp(psnap_type, SNAP_ETH_TYPE_APPLETALK_AARP, 2) == false)) ||
1354 !memcmp(psnap, rtw_bridge_tunnel_header, SNAP_SIZE)) {
1355 /* remove RFC1042 or Bridge-Tunnel encapsulation and replace EtherType */
1356 bsnaphdr = true;
1357 } else {
1358 /* Leave Ethernet header part of hdr and full payload */
1359 bsnaphdr = false;
1360 }
1361
1362 rmv_len = pattrib->hdrlen + pattrib->iv_len + (bsnaphdr ? SNAP_SIZE : 0);
1363 len = precvframe->len - rmv_len;
1364
1365 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_,
1366 ("\n===pattrib->hdrlen: %x, pattrib->iv_len:%x===\n\n", pattrib->hdrlen, pattrib->iv_len));
1367
1368 memcpy(&be_tmp, ptr+rmv_len, 2);
1369 eth_type = ntohs(be_tmp); /* pattrib->ether_type */
1370 pattrib->eth_type = eth_type;
1371
1372 if ((check_fwstate(pmlmepriv, WIFI_MP_STATE))) {
1373 ptr += rmv_len;
1374 *ptr = 0x87;
1375 *(ptr+1) = 0x12;
1376
1377 eth_type = 0x8712;
1378 /* append rx status for mp test packets */
1379 ptr = recvframe_pull(precvframe, (rmv_len-sizeof(struct ethhdr)+2)-24);
1380 memcpy(ptr, get_rxmem(precvframe), 24);
1381 ptr += 24;
1382 } else {
1383 ptr = recvframe_pull(precvframe, (rmv_len-sizeof(struct ethhdr) + (bsnaphdr ? 2 : 0)));
1384 }
1385
1386 if (!ptr)
1387 return _FAIL;
1388
1389 memcpy(ptr, pattrib->dst, ETH_ALEN);
1390 memcpy(ptr+ETH_ALEN, pattrib->src, ETH_ALEN);
1391
1392 if (!bsnaphdr) {
1393 be_tmp = htons(len);
1394 memcpy(ptr+12, &be_tmp, 2);
1395 }
1396
1397 return _SUCCESS;
1398 }
1399
1400 /* perform defrag */
recvframe_defrag(struct adapter * adapter,struct __queue * defrag_q)1401 static struct recv_frame *recvframe_defrag(struct adapter *adapter,
1402 struct __queue *defrag_q)
1403 {
1404 struct list_head *plist, *phead;
1405 u8 wlanhdr_offset;
1406 u8 curfragnum;
1407 struct recv_frame *pfhdr, *pnfhdr;
1408 struct recv_frame *prframe, *pnextrframe;
1409 struct __queue *pfree_recv_queue;
1410
1411 curfragnum = 0;
1412 pfree_recv_queue = &adapter->recvpriv.free_recv_queue;
1413
1414 phead = get_list_head(defrag_q);
1415 plist = phead->next;
1416 pfhdr = container_of(plist, struct recv_frame, list);
1417 prframe = pfhdr;
1418 list_del_init(&(prframe->list));
1419
1420 if (curfragnum != pfhdr->attrib.frag_num) {
1421 /* the first fragment number must be 0 */
1422 /* free the whole queue */
1423 rtw_free_recvframe(prframe, pfree_recv_queue);
1424 rtw_free_recvframe_queue(defrag_q, pfree_recv_queue);
1425
1426 return NULL;
1427 }
1428
1429 curfragnum++;
1430
1431 plist = get_list_head(defrag_q);
1432
1433 plist = plist->next;
1434
1435 while (phead != plist) {
1436 pnfhdr = container_of(plist, struct recv_frame, list);
1437 pnextrframe = pnfhdr;
1438
1439 /* check the fragment sequence (2nd ~n fragment frame) */
1440
1441 if (curfragnum != pnfhdr->attrib.frag_num) {
1442 /* the fragment number must be increasing (after decache) */
1443 /* release the defrag_q & prframe */
1444 rtw_free_recvframe(prframe, pfree_recv_queue);
1445 rtw_free_recvframe_queue(defrag_q, pfree_recv_queue);
1446 return NULL;
1447 }
1448
1449 curfragnum++;
1450
1451 /* copy the 2nd~n fragment frame's payload to the first fragment */
1452 /* get the 2nd~last fragment frame's payload */
1453
1454 wlanhdr_offset = pnfhdr->attrib.hdrlen + pnfhdr->attrib.iv_len;
1455
1456 recvframe_pull(pnextrframe, wlanhdr_offset);
1457
1458 /* append to first fragment frame's tail (if privacy frame, pull the ICV) */
1459 recvframe_pull_tail(prframe, pfhdr->attrib.icv_len);
1460
1461 /* memcpy */
1462 memcpy(pfhdr->rx_tail, pnfhdr->rx_data, pnfhdr->len);
1463
1464 recvframe_put(prframe, pnfhdr->len);
1465
1466 pfhdr->attrib.icv_len = pnfhdr->attrib.icv_len;
1467 plist = plist->next;
1468 }
1469
1470 /* free the defrag_q queue and return the prframe */
1471 rtw_free_recvframe_queue(defrag_q, pfree_recv_queue);
1472
1473 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("Performance defrag!!!!!\n"));
1474
1475 return prframe;
1476 }
1477
1478 /* check if need to defrag, if needed queue the frame to defrag_q */
recvframe_chk_defrag(struct adapter * padapter,struct recv_frame * precv_frame)1479 struct recv_frame *recvframe_chk_defrag(struct adapter *padapter,
1480 struct recv_frame *precv_frame)
1481 {
1482 u8 ismfrag;
1483 u8 fragnum;
1484 u8 *psta_addr;
1485 struct recv_frame *pfhdr;
1486 struct sta_info *psta;
1487 struct sta_priv *pstapriv;
1488 struct list_head *phead;
1489 struct recv_frame *prtnframe = NULL;
1490 struct __queue *pfree_recv_queue, *pdefrag_q;
1491
1492 pstapriv = &padapter->stapriv;
1493
1494 pfhdr = precv_frame;
1495
1496 pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
1497
1498 /* need to define struct of wlan header frame ctrl */
1499 ismfrag = pfhdr->attrib.mfrag;
1500 fragnum = pfhdr->attrib.frag_num;
1501
1502 psta_addr = pfhdr->attrib.ta;
1503 psta = rtw_get_stainfo(pstapriv, psta_addr);
1504 if (psta == NULL) {
1505 u8 type = GetFrameType(pfhdr->rx_data);
1506 if (type != WIFI_DATA_TYPE) {
1507 psta = rtw_get_bcmc_stainfo(padapter);
1508 pdefrag_q = &psta->sta_recvpriv.defrag_q;
1509 } else {
1510 pdefrag_q = NULL;
1511 }
1512 } else {
1513 pdefrag_q = &psta->sta_recvpriv.defrag_q;
1514 }
1515
1516 if ((ismfrag == 0) && (fragnum == 0))
1517 prtnframe = precv_frame;/* isn't a fragment frame */
1518
1519 if (ismfrag == 1) {
1520 /* 0~(n-1) fragment frame */
1521 /* enqueue to defraf_g */
1522 if (pdefrag_q != NULL) {
1523 if (fragnum == 0) {
1524 /* the first fragment */
1525 if (!list_empty(&pdefrag_q->queue))
1526 /* free current defrag_q */
1527 rtw_free_recvframe_queue(pdefrag_q, pfree_recv_queue);
1528 }
1529
1530 /* Then enqueue the 0~(n-1) fragment into the defrag_q */
1531
1532 phead = get_list_head(pdefrag_q);
1533 list_add_tail(&pfhdr->list, phead);
1534
1535 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("Enqueuq: ismfrag=%d, fragnum=%d\n", ismfrag, fragnum));
1536
1537 prtnframe = NULL;
1538 } else {
1539 /* can't find this ta's defrag_queue, so free this recv_frame */
1540 rtw_free_recvframe(precv_frame, pfree_recv_queue);
1541 prtnframe = NULL;
1542 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("Free because pdefrag_q==NULL: ismfrag=%d, fragnum=%d\n", ismfrag, fragnum));
1543 }
1544 }
1545
1546 if ((ismfrag == 0) && (fragnum != 0)) {
1547 /* the last fragment frame */
1548 /* enqueue the last fragment */
1549 if (pdefrag_q != NULL) {
1550 phead = get_list_head(pdefrag_q);
1551 list_add_tail(&pfhdr->list, phead);
1552
1553 /* call recvframe_defrag to defrag */
1554 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("defrag: ismfrag=%d, fragnum=%d\n", ismfrag, fragnum));
1555 precv_frame = recvframe_defrag(padapter, pdefrag_q);
1556 prtnframe = precv_frame;
1557 } else {
1558 /* can't find this ta's defrag_queue, so free this recv_frame */
1559 rtw_free_recvframe(precv_frame, pfree_recv_queue);
1560 prtnframe = NULL;
1561 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("Free because pdefrag_q==NULL: ismfrag=%d, fragnum=%d\n", ismfrag, fragnum));
1562 }
1563 }
1564
1565 if ((prtnframe != NULL) && (prtnframe->attrib.privacy)) {
1566 /* after defrag we must check tkip mic code */
1567 if (recvframe_chkmic(padapter, prtnframe) == _FAIL) {
1568 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("recvframe_chkmic(padapter, prtnframe)==_FAIL\n"));
1569 rtw_free_recvframe(prtnframe, pfree_recv_queue);
1570 prtnframe = NULL;
1571 }
1572 }
1573
1574 return prtnframe;
1575 }
1576
amsdu_to_msdu(struct adapter * padapter,struct recv_frame * prframe)1577 static int amsdu_to_msdu(struct adapter *padapter, struct recv_frame *prframe)
1578 {
1579 int a_len, padding_len;
1580 u16 eth_type, nSubframe_Length;
1581 u8 nr_subframes, i;
1582 unsigned char *pdata;
1583 struct rx_pkt_attrib *pattrib;
1584 unsigned char *data_ptr;
1585 struct sk_buff *sub_skb, *subframes[MAX_SUBFRAME_COUNT];
1586 struct recv_priv *precvpriv = &padapter->recvpriv;
1587 struct __queue *pfree_recv_queue = &(precvpriv->free_recv_queue);
1588 nr_subframes = 0;
1589
1590 pattrib = &prframe->attrib;
1591
1592 recvframe_pull(prframe, prframe->attrib.hdrlen);
1593
1594 if (prframe->attrib.iv_len > 0)
1595 recvframe_pull(prframe, prframe->attrib.iv_len);
1596
1597 a_len = prframe->len;
1598
1599 pdata = prframe->rx_data;
1600
1601 while (a_len > ETH_HLEN) {
1602 /* Offset 12 denote 2 mac address */
1603 nSubframe_Length = get_unaligned_be16(pdata + 12);
1604
1605 if (a_len < (ETHERNET_HEADER_SIZE + nSubframe_Length)) {
1606 DBG_88E("nRemain_Length is %d and nSubframe_Length is : %d\n", a_len, nSubframe_Length);
1607 goto exit;
1608 }
1609
1610 /* move the data point to data content */
1611 pdata += ETH_HLEN;
1612 a_len -= ETH_HLEN;
1613
1614 /* Allocate new skb for releasing to upper layer */
1615 sub_skb = dev_alloc_skb(nSubframe_Length + 12);
1616 if (sub_skb) {
1617 skb_reserve(sub_skb, 12);
1618 data_ptr = (u8 *)skb_put(sub_skb, nSubframe_Length);
1619 memcpy(data_ptr, pdata, nSubframe_Length);
1620 } else {
1621 sub_skb = skb_clone(prframe->pkt, GFP_ATOMIC);
1622 if (sub_skb) {
1623 sub_skb->data = pdata;
1624 sub_skb->len = nSubframe_Length;
1625 skb_set_tail_pointer(sub_skb, nSubframe_Length);
1626 } else {
1627 DBG_88E("skb_clone() Fail!!! , nr_subframes=%d\n", nr_subframes);
1628 break;
1629 }
1630 }
1631
1632 subframes[nr_subframes++] = sub_skb;
1633
1634 if (nr_subframes >= MAX_SUBFRAME_COUNT) {
1635 DBG_88E("ParseSubframe(): Too many Subframes! Packets dropped!\n");
1636 break;
1637 }
1638
1639 pdata += nSubframe_Length;
1640 a_len -= nSubframe_Length;
1641 if (a_len != 0) {
1642 padding_len = 4 - ((nSubframe_Length + ETH_HLEN) & (4-1));
1643 if (padding_len == 4)
1644 padding_len = 0;
1645
1646 if (a_len < padding_len) {
1647 goto exit;
1648 }
1649 pdata += padding_len;
1650 a_len -= padding_len;
1651 }
1652 }
1653
1654 for (i = 0; i < nr_subframes; i++) {
1655 sub_skb = subframes[i];
1656 /* convert hdr + possible LLC headers into Ethernet header */
1657 eth_type = get_unaligned_be16(&sub_skb->data[6]);
1658 if (sub_skb->len >= 8 &&
1659 ((!memcmp(sub_skb->data, rtw_rfc1042_header, SNAP_SIZE) &&
1660 eth_type != ETH_P_AARP && eth_type != ETH_P_IPX) ||
1661 !memcmp(sub_skb->data, rtw_bridge_tunnel_header, SNAP_SIZE))) {
1662 /* remove RFC1042 or Bridge-Tunnel encapsulation and replace EtherType */
1663 skb_pull(sub_skb, SNAP_SIZE);
1664 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src, ETH_ALEN);
1665 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst, ETH_ALEN);
1666 } else {
1667 __be16 len;
1668 /* Leave Ethernet header part of hdr and full payload */
1669 len = htons(sub_skb->len);
1670 memcpy(skb_push(sub_skb, 2), &len, 2);
1671 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->src, ETH_ALEN);
1672 memcpy(skb_push(sub_skb, ETH_ALEN), pattrib->dst, ETH_ALEN);
1673 }
1674
1675 /* Indicate the packets to upper layer */
1676 /* Insert NAT2.5 RX here! */
1677 sub_skb->protocol = eth_type_trans(sub_skb, padapter->pnetdev);
1678 sub_skb->dev = padapter->pnetdev;
1679
1680 sub_skb->ip_summed = CHECKSUM_NONE;
1681
1682 netif_rx(sub_skb);
1683 }
1684
1685 exit:
1686
1687 prframe->len = 0;
1688 rtw_free_recvframe(prframe, pfree_recv_queue);/* free this recv_frame */
1689
1690 return _SUCCESS;
1691 }
1692
check_indicate_seq(struct recv_reorder_ctrl * preorder_ctrl,u16 seq_num)1693 static int check_indicate_seq(struct recv_reorder_ctrl *preorder_ctrl, u16 seq_num)
1694 {
1695 u8 wsize = preorder_ctrl->wsize_b;
1696 u16 wend = (preorder_ctrl->indicate_seq + wsize - 1) & 0xFFF;/* 4096; */
1697
1698 /* Rx Reorder initialize condition. */
1699 if (preorder_ctrl->indicate_seq == 0xFFFF)
1700 preorder_ctrl->indicate_seq = seq_num;
1701
1702 /* Drop out the packet which SeqNum is smaller than WinStart */
1703 if (SN_LESS(seq_num, preorder_ctrl->indicate_seq))
1704 return false;
1705
1706 /* */
1707 /* Sliding window manipulation. Conditions includes: */
1708 /* 1. Incoming SeqNum is equal to WinStart =>Window shift 1 */
1709 /* 2. Incoming SeqNum is larger than the WinEnd => Window shift N */
1710 /* */
1711 if (SN_EQUAL(seq_num, preorder_ctrl->indicate_seq)) {
1712 preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1) & 0xFFF;
1713 } else if (SN_LESS(wend, seq_num)) {
1714 if (seq_num >= (wsize - 1))
1715 preorder_ctrl->indicate_seq = seq_num + 1 - wsize;
1716 else
1717 preorder_ctrl->indicate_seq = 0xFFF - (wsize - (seq_num + 1)) + 1;
1718 }
1719
1720 return true;
1721 }
1722
enqueue_reorder_recvframe(struct recv_reorder_ctrl * preorder_ctrl,struct recv_frame * prframe)1723 static int enqueue_reorder_recvframe(struct recv_reorder_ctrl *preorder_ctrl,
1724 struct recv_frame *prframe)
1725 {
1726 struct rx_pkt_attrib *pattrib = &prframe->attrib;
1727 struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
1728 struct list_head *phead, *plist;
1729 struct recv_frame *hdr;
1730 struct rx_pkt_attrib *pnextattrib;
1731
1732 phead = get_list_head(ppending_recvframe_queue);
1733 plist = phead->next;
1734
1735 while (phead != plist) {
1736 hdr = container_of(plist, struct recv_frame, list);
1737 pnextattrib = &hdr->attrib;
1738
1739 if (SN_LESS(pnextattrib->seq_num, pattrib->seq_num))
1740 plist = plist->next;
1741 else if (SN_EQUAL(pnextattrib->seq_num, pattrib->seq_num))
1742 return false;
1743 else
1744 break;
1745 }
1746
1747 list_del_init(&(prframe->list));
1748
1749 list_add_tail(&(prframe->list), plist);
1750 return true;
1751 }
1752
recv_indicatepkts_in_order(struct adapter * padapter,struct recv_reorder_ctrl * preorder_ctrl,int bforced)1753 static int recv_indicatepkts_in_order(struct adapter *padapter, struct recv_reorder_ctrl *preorder_ctrl, int bforced)
1754 {
1755 struct list_head *phead, *plist;
1756 struct recv_frame *prframe;
1757 struct recv_frame *prhdr;
1758 struct rx_pkt_attrib *pattrib;
1759 int bPktInBuf = false;
1760 struct recv_priv *precvpriv = &padapter->recvpriv;
1761 struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
1762
1763 phead = get_list_head(ppending_recvframe_queue);
1764 plist = phead->next;
1765
1766 /* Handling some condition for forced indicate case. */
1767 if (bforced) {
1768 if (list_empty(phead))
1769 return true;
1770
1771 prhdr = container_of(plist, struct recv_frame, list);
1772 pattrib = &prhdr->attrib;
1773 preorder_ctrl->indicate_seq = pattrib->seq_num;
1774 }
1775
1776 /* Prepare indication list and indication. */
1777 /* Check if there is any packet need indicate. */
1778 while (!list_empty(phead)) {
1779 prhdr = container_of(plist, struct recv_frame, list);
1780 prframe = prhdr;
1781 pattrib = &prframe->attrib;
1782
1783 if (!SN_LESS(preorder_ctrl->indicate_seq, pattrib->seq_num)) {
1784 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_,
1785 ("recv_indicatepkts_in_order: indicate=%d seq=%d amsdu=%d\n",
1786 preorder_ctrl->indicate_seq, pattrib->seq_num, pattrib->amsdu));
1787 plist = plist->next;
1788 list_del_init(&(prframe->list));
1789
1790 if (SN_EQUAL(preorder_ctrl->indicate_seq, pattrib->seq_num))
1791 preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1) & 0xFFF;
1792
1793 /* Set this as a lock to make sure that only one thread is indicating packet. */
1794
1795 /* indicate this recv_frame */
1796 if (!pattrib->amsdu) {
1797 if ((!padapter->bDriverStopped) &&
1798 (!padapter->bSurpriseRemoved))
1799 rtw_recv_indicatepkt(padapter, prframe);/* indicate this recv_frame */
1800 } else if (pattrib->amsdu == 1) {
1801 if (amsdu_to_msdu(padapter, prframe) != _SUCCESS)
1802 rtw_free_recvframe(prframe, &precvpriv->free_recv_queue);
1803 } else {
1804 /* error condition; */
1805 }
1806
1807 /* Update local variables. */
1808 bPktInBuf = false;
1809 } else {
1810 bPktInBuf = true;
1811 break;
1812 }
1813 }
1814 return bPktInBuf;
1815 }
1816
recv_indicatepkt_reorder(struct adapter * padapter,struct recv_frame * prframe)1817 static int recv_indicatepkt_reorder(struct adapter *padapter,
1818 struct recv_frame *prframe)
1819 {
1820 int retval = _SUCCESS;
1821 struct rx_pkt_attrib *pattrib = &prframe->attrib;
1822 struct recv_reorder_ctrl *preorder_ctrl = prframe->preorder_ctrl;
1823 struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
1824
1825 if (!pattrib->amsdu) {
1826 /* s1. */
1827 wlanhdr_to_ethhdr(prframe);
1828
1829 if ((pattrib->qos != 1) || (pattrib->eth_type == 0x0806) ||
1830 (pattrib->ack_policy != 0)) {
1831 if ((!padapter->bDriverStopped) &&
1832 (!padapter->bSurpriseRemoved)) {
1833 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("@@@@ recv_indicatepkt_reorder -recv_func recv_indicatepkt\n"));
1834
1835 rtw_recv_indicatepkt(padapter, prframe);
1836 return _SUCCESS;
1837 }
1838
1839 return _FAIL;
1840 }
1841
1842 if (!preorder_ctrl->enable) {
1843 /* indicate this recv_frame */
1844 preorder_ctrl->indicate_seq = pattrib->seq_num;
1845 rtw_recv_indicatepkt(padapter, prframe);
1846
1847 preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1)%4096;
1848 return _SUCCESS;
1849 }
1850 } else if (pattrib->amsdu == 1) { /* temp filter -> means didn't support A-MSDUs in a A-MPDU */
1851 if (!preorder_ctrl->enable) {
1852 preorder_ctrl->indicate_seq = pattrib->seq_num;
1853 retval = amsdu_to_msdu(padapter, prframe);
1854
1855 preorder_ctrl->indicate_seq = (preorder_ctrl->indicate_seq + 1)%4096;
1856 return retval;
1857 }
1858 }
1859
1860 spin_lock_bh(&ppending_recvframe_queue->lock);
1861
1862 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_,
1863 ("recv_indicatepkt_reorder: indicate=%d seq=%d\n",
1864 preorder_ctrl->indicate_seq, pattrib->seq_num));
1865
1866 /* s2. check if winstart_b(indicate_seq) needs to been updated */
1867 if (!check_indicate_seq(preorder_ctrl, pattrib->seq_num)) {
1868 rtw_recv_indicatepkt(padapter, prframe);
1869
1870 spin_unlock_bh(&ppending_recvframe_queue->lock);
1871
1872 goto _success_exit;
1873 }
1874
1875 /* s3. Insert all packet into Reorder Queue to maintain its ordering. */
1876 if (!enqueue_reorder_recvframe(preorder_ctrl, prframe))
1877 goto _err_exit;
1878
1879 /* s4. */
1880 /* Indication process. */
1881 /* After Packet dropping and Sliding Window shifting as above, we can now just indicate the packets */
1882 /* with the SeqNum smaller than latest WinStart and buffer other packets. */
1883 /* */
1884 /* For Rx Reorder condition: */
1885 /* 1. All packets with SeqNum smaller than WinStart => Indicate */
1886 /* 2. All packets with SeqNum larger than or equal to WinStart => Buffer it. */
1887 /* */
1888
1889 /* recv_indicatepkts_in_order(padapter, preorder_ctrl, true); */
1890 if (recv_indicatepkts_in_order(padapter, preorder_ctrl, false)) {
1891 mod_timer(&preorder_ctrl->reordering_ctrl_timer,
1892 jiffies + msecs_to_jiffies(REORDER_WAIT_TIME));
1893 spin_unlock_bh(&ppending_recvframe_queue->lock);
1894 } else {
1895 spin_unlock_bh(&ppending_recvframe_queue->lock);
1896 del_timer_sync(&preorder_ctrl->reordering_ctrl_timer);
1897 }
1898
1899 _success_exit:
1900
1901 return _SUCCESS;
1902
1903 _err_exit:
1904
1905 spin_unlock_bh(&ppending_recvframe_queue->lock);
1906
1907 return _FAIL;
1908 }
1909
rtw_reordering_ctrl_timeout_handler(unsigned long data)1910 void rtw_reordering_ctrl_timeout_handler(unsigned long data)
1911 {
1912 struct recv_reorder_ctrl *preorder_ctrl = (struct recv_reorder_ctrl *)data;
1913 struct adapter *padapter = preorder_ctrl->padapter;
1914 struct __queue *ppending_recvframe_queue = &preorder_ctrl->pending_recvframe_queue;
1915
1916 if (padapter->bDriverStopped || padapter->bSurpriseRemoved)
1917 return;
1918
1919 spin_lock_bh(&ppending_recvframe_queue->lock);
1920
1921 if (recv_indicatepkts_in_order(padapter, preorder_ctrl, true) == true)
1922 mod_timer(&preorder_ctrl->reordering_ctrl_timer,
1923 jiffies + msecs_to_jiffies(REORDER_WAIT_TIME));
1924
1925 spin_unlock_bh(&ppending_recvframe_queue->lock);
1926 }
1927
process_recv_indicatepkts(struct adapter * padapter,struct recv_frame * prframe)1928 static int process_recv_indicatepkts(struct adapter *padapter,
1929 struct recv_frame *prframe)
1930 {
1931 int retval = _SUCCESS;
1932 struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
1933 struct ht_priv *phtpriv = &pmlmepriv->htpriv;
1934
1935 if (phtpriv->ht_option) { /* B/G/N Mode */
1936 if (recv_indicatepkt_reorder(padapter, prframe) != _SUCCESS) {
1937 /* including perform A-MPDU Rx Ordering Buffer Control */
1938 if ((!padapter->bDriverStopped) &&
1939 (!padapter->bSurpriseRemoved)) {
1940 retval = _FAIL;
1941 return retval;
1942 }
1943 }
1944 } else { /* B/G mode */
1945 retval = wlanhdr_to_ethhdr(prframe);
1946 if (retval != _SUCCESS) {
1947 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("wlanhdr_to_ethhdr: drop pkt\n"));
1948 return retval;
1949 }
1950
1951 if ((!padapter->bDriverStopped) &&
1952 (!padapter->bSurpriseRemoved)) {
1953 /* indicate this recv_frame */
1954 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("@@@@ process_recv_indicatepkts- recv_func recv_indicatepkt\n"));
1955 rtw_recv_indicatepkt(padapter, prframe);
1956 } else {
1957 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("@@@@ process_recv_indicatepkts- recv_func free_indicatepkt\n"));
1958
1959 RT_TRACE(_module_rtl871x_recv_c_, _drv_notice_, ("recv_func:bDriverStopped(%d) OR bSurpriseRemoved(%d)", padapter->bDriverStopped, padapter->bSurpriseRemoved));
1960 retval = _FAIL;
1961 return retval;
1962 }
1963 }
1964
1965 return retval;
1966 }
1967
recv_func_prehandle(struct adapter * padapter,struct recv_frame * rframe)1968 static int recv_func_prehandle(struct adapter *padapter,
1969 struct recv_frame *rframe)
1970 {
1971 int ret = _SUCCESS;
1972 struct __queue *pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
1973
1974 /* check the frame crtl field and decache */
1975 ret = validate_recv_frame(padapter, rframe);
1976 if (ret != _SUCCESS) {
1977 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("recv_func: validate_recv_frame fail! drop pkt\n"));
1978 rtw_free_recvframe(rframe, pfree_recv_queue);/* free this recv_frame */
1979 goto exit;
1980 }
1981
1982 exit:
1983 return ret;
1984 }
1985
recv_func_posthandle(struct adapter * padapter,struct recv_frame * prframe)1986 static int recv_func_posthandle(struct adapter *padapter,
1987 struct recv_frame *prframe)
1988 {
1989 int ret = _SUCCESS;
1990 struct recv_frame *orig_prframe = prframe;
1991 struct recv_priv *precvpriv = &padapter->recvpriv;
1992 struct __queue *pfree_recv_queue = &padapter->recvpriv.free_recv_queue;
1993
1994 /* DATA FRAME */
1995 rtw_led_control(padapter, LED_CTL_RX);
1996
1997 prframe = decryptor(padapter, prframe);
1998 if (prframe == NULL) {
1999 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("decryptor: drop pkt\n"));
2000 ret = _FAIL;
2001 goto _recv_data_drop;
2002 }
2003
2004 prframe = recvframe_chk_defrag(padapter, prframe);
2005 if (prframe == NULL) {
2006 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("recvframe_chk_defrag: drop pkt\n"));
2007 goto _recv_data_drop;
2008 }
2009
2010 prframe = portctrl(padapter, prframe);
2011 if (prframe == NULL) {
2012 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("portctrl: drop pkt\n"));
2013 ret = _FAIL;
2014 goto _recv_data_drop;
2015 }
2016
2017 count_rx_stats(padapter, prframe, NULL);
2018
2019 ret = process_recv_indicatepkts(padapter, prframe);
2020 if (ret != _SUCCESS) {
2021 RT_TRACE(_module_rtl871x_recv_c_, _drv_err_, ("recv_func: process_recv_indicatepkts fail!\n"));
2022 rtw_free_recvframe(orig_prframe, pfree_recv_queue);/* free this recv_frame */
2023 goto _recv_data_drop;
2024 }
2025 return ret;
2026
2027 _recv_data_drop:
2028 precvpriv->rx_drop++;
2029 return ret;
2030 }
2031
recv_func(struct adapter * padapter,struct recv_frame * rframe)2032 static int recv_func(struct adapter *padapter, struct recv_frame *rframe)
2033 {
2034 int ret;
2035 struct rx_pkt_attrib *prxattrib = &rframe->attrib;
2036 struct security_priv *psecuritypriv = &padapter->securitypriv;
2037 struct mlme_priv *mlmepriv = &padapter->mlmepriv;
2038
2039 /* check if need to handle uc_swdec_pending_queue*/
2040 if (check_fwstate(mlmepriv, WIFI_STATION_STATE) && psecuritypriv->busetkipkey) {
2041 struct recv_frame *pending_frame;
2042
2043 while ((pending_frame = rtw_alloc_recvframe(&padapter->recvpriv.uc_swdec_pending_queue))) {
2044 if (recv_func_posthandle(padapter, pending_frame) == _SUCCESS)
2045 DBG_88E("%s: dequeue uc_swdec_pending_queue\n", __func__);
2046 }
2047 }
2048
2049 ret = recv_func_prehandle(padapter, rframe);
2050
2051 if (ret == _SUCCESS) {
2052 /* check if need to enqueue into uc_swdec_pending_queue*/
2053 if (check_fwstate(mlmepriv, WIFI_STATION_STATE) &&
2054 !IS_MCAST(prxattrib->ra) && prxattrib->encrypt > 0 &&
2055 (prxattrib->bdecrypted == 0 || psecuritypriv->sw_decrypt) &&
2056 !is_wep_enc(psecuritypriv->dot11PrivacyAlgrthm) &&
2057 !psecuritypriv->busetkipkey) {
2058 rtw_enqueue_recvframe(rframe, &padapter->recvpriv.uc_swdec_pending_queue);
2059 DBG_88E("%s: no key, enqueue uc_swdec_pending_queue\n", __func__);
2060 goto exit;
2061 }
2062
2063 ret = recv_func_posthandle(padapter, rframe);
2064 }
2065
2066 exit:
2067 return ret;
2068 }
2069
rtw_recv_entry(struct recv_frame * precvframe)2070 s32 rtw_recv_entry(struct recv_frame *precvframe)
2071 {
2072 struct adapter *padapter;
2073 struct recv_priv *precvpriv;
2074 s32 ret = _SUCCESS;
2075
2076 padapter = precvframe->adapter;
2077
2078 precvpriv = &padapter->recvpriv;
2079
2080 ret = recv_func(padapter, precvframe);
2081 if (ret == _FAIL) {
2082 RT_TRACE(_module_rtl871x_recv_c_, _drv_info_, ("rtw_recv_entry: recv_func return fail!!!\n"));
2083 goto _recv_entry_drop;
2084 }
2085
2086 precvpriv->rx_pkts++;
2087
2088 return ret;
2089
2090 _recv_entry_drop:
2091 return ret;
2092 }
2093
rtw_signal_stat_timer_hdl(unsigned long data)2094 static void rtw_signal_stat_timer_hdl(unsigned long data)
2095 {
2096 struct adapter *adapter = (struct adapter *)data;
2097 struct recv_priv *recvpriv = &adapter->recvpriv;
2098
2099 u32 tmp_s, tmp_q;
2100 u8 avg_signal_strength = 0;
2101 u8 avg_signal_qual = 0;
2102 u8 _alpha = 3; /* this value is based on converging_constant = 5000 and sampling_interval = 1000 */
2103
2104 if (adapter->recvpriv.is_signal_dbg) {
2105 /* update the user specific value, signal_strength_dbg, to signal_strength, rssi */
2106 adapter->recvpriv.signal_strength = adapter->recvpriv.signal_strength_dbg;
2107 adapter->recvpriv.rssi = (s8)translate_percentage_to_dbm((u8)adapter->recvpriv.signal_strength_dbg);
2108 } else {
2109 if (recvpriv->signal_strength_data.update_req == 0) {/* update_req is clear, means we got rx */
2110 avg_signal_strength = recvpriv->signal_strength_data.avg_val;
2111 /* after avg_vals are acquired, we can re-stat the signal values */
2112 recvpriv->signal_strength_data.update_req = 1;
2113 }
2114
2115 if (recvpriv->signal_qual_data.update_req == 0) {/* update_req is clear, means we got rx */
2116 avg_signal_qual = recvpriv->signal_qual_data.avg_val;
2117 /* after avg_vals are acquired, we can re-stat the signal values */
2118 recvpriv->signal_qual_data.update_req = 1;
2119 }
2120
2121 /* update value of signal_strength, rssi, signal_qual */
2122 if (check_fwstate(&adapter->mlmepriv, _FW_UNDER_SURVEY) == false) {
2123 tmp_s = avg_signal_strength+(_alpha-1)*recvpriv->signal_strength;
2124 if (tmp_s % _alpha)
2125 tmp_s = tmp_s/_alpha + 1;
2126 else
2127 tmp_s = tmp_s/_alpha;
2128 if (tmp_s > 100)
2129 tmp_s = 100;
2130
2131 tmp_q = avg_signal_qual+(_alpha-1)*recvpriv->signal_qual;
2132 if (tmp_q % _alpha)
2133 tmp_q = tmp_q/_alpha + 1;
2134 else
2135 tmp_q = tmp_q/_alpha;
2136 if (tmp_q > 100)
2137 tmp_q = 100;
2138
2139 recvpriv->signal_strength = tmp_s;
2140 recvpriv->rssi = (s8)translate_percentage_to_dbm(tmp_s);
2141 recvpriv->signal_qual = tmp_q;
2142 }
2143 }
2144 rtw_set_signal_stat_timer(recvpriv);
2145 }
2146