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1 | /****************************************************************************** |
2 | * rtl871x_recv.c | |
3 | * | |
4 | * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved. | |
5 | * Linux device driver for RTL8192SU | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify it | |
8 | * under the terms of version 2 of the GNU General Public License as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
14 | * more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License along with | |
17 | * this program; if not, write to the Free Software Foundation, Inc., | |
18 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA | |
19 | * | |
20 | * Modifications for inclusion into the Linux staging tree are | |
21 | * Copyright(c) 2010 Larry Finger. All rights reserved. | |
22 | * | |
23 | * Contact information: | |
24 | * WLAN FAE <wlanfae@realtek.com> | |
25 | * Larry Finger <Larry.Finger@lwfinger.net> | |
26 | * | |
27 | ******************************************************************************/ | |
28 | ||
29 | #define _RTL871X_RECV_C_ | |
30 | ||
31 | #include "osdep_service.h" | |
32 | #include "drv_types.h" | |
33 | #include "recv_osdep.h" | |
34 | #include "mlme_osdep.h" | |
35 | #include "ip.h" | |
36 | #include "if_ether.h" | |
37 | #include "ethernet.h" | |
38 | #include "usb_ops.h" | |
39 | #include "wifi.h" | |
40 | ||
41 | static const u8 SNAP_ETH_TYPE_IPX[2] = {0x81, 0x37}; | |
42 | ||
43 | /* Datagram Delivery Protocol */ | |
44 | static const u8 SNAP_ETH_TYPE_APPLETALK_AARP[2] = {0x80, 0xf3}; | |
45 | ||
46 | /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ | |
47 | static const u8 bridge_tunnel_header[] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8}; | |
48 | ||
49 | /* Ethernet-II snap header (RFC1042 for most EtherTypes) */ | |
50 | static const u8 rfc1042_header[] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00}; | |
51 | ||
52 | void _r8712_init_sta_recv_priv(struct sta_recv_priv *psta_recvpriv) | |
53 | { | |
54 | memset((u8 *)psta_recvpriv, 0, sizeof(struct sta_recv_priv)); | |
55 | spin_lock_init(&psta_recvpriv->lock); | |
56 | _init_queue(&psta_recvpriv->defrag_q); | |
57 | } | |
58 | ||
59 | sint _r8712_init_recv_priv(struct recv_priv *precvpriv, | |
60 | struct _adapter *padapter) | |
61 | { | |
62 | sint i; | |
63 | union recv_frame *precvframe; | |
64 | ||
65 | memset((unsigned char *)precvpriv, 0, sizeof(struct recv_priv)); | |
66 | spin_lock_init(&precvpriv->lock); | |
67 | _init_queue(&precvpriv->free_recv_queue); | |
68 | _init_queue(&precvpriv->recv_pending_queue); | |
69 | precvpriv->adapter = padapter; | |
70 | precvpriv->free_recvframe_cnt = NR_RECVFRAME; | |
71 | precvpriv->pallocated_frame_buf = _malloc(NR_RECVFRAME * | |
72 | sizeof(union recv_frame) + | |
73 | RXFRAME_ALIGN_SZ); | |
74 | if (precvpriv->pallocated_frame_buf == NULL) | |
75 | return _FAIL; | |
76 | memset(precvpriv->pallocated_frame_buf, 0, NR_RECVFRAME * | |
77 | sizeof(union recv_frame) + RXFRAME_ALIGN_SZ); | |
78 | precvpriv->precv_frame_buf = precvpriv->pallocated_frame_buf + | |
79 | RXFRAME_ALIGN_SZ - | |
80 | ((addr_t)(precvpriv->pallocated_frame_buf) & | |
81 | (RXFRAME_ALIGN_SZ-1)); | |
82 | precvframe = (union recv_frame *)precvpriv->precv_frame_buf; | |
83 | for (i = 0; i < NR_RECVFRAME; i++) { | |
84 | _init_listhead(&(precvframe->u.list)); | |
85 | list_insert_tail(&(precvframe->u.list), | |
86 | &(precvpriv->free_recv_queue.queue)); | |
87 | r8712_os_recv_resource_alloc(padapter, precvframe); | |
88 | precvframe->u.hdr.adapter = padapter; | |
89 | precvframe++; | |
90 | } | |
91 | precvpriv->rx_pending_cnt = 1; | |
92 | sema_init(&precvpriv->allrxreturnevt, 0); | |
93 | return r8712_init_recv_priv(precvpriv, padapter); | |
94 | } | |
95 | ||
96 | void _r8712_free_recv_priv(struct recv_priv *precvpriv) | |
97 | { | |
98 | kfree(precvpriv->pallocated_frame_buf); | |
99 | r8712_free_recv_priv(precvpriv); | |
100 | } | |
101 | ||
102 | union recv_frame *r8712_alloc_recvframe(struct __queue *pfree_recv_queue) | |
103 | { | |
104 | unsigned long irqL; | |
105 | union recv_frame *precvframe; | |
106 | struct list_head *plist, *phead; | |
107 | struct _adapter *padapter; | |
108 | struct recv_priv *precvpriv; | |
109 | ||
110 | spin_lock_irqsave(&pfree_recv_queue->lock, irqL); | |
111 | if (_queue_empty(pfree_recv_queue) == true) | |
112 | precvframe = NULL; | |
113 | else { | |
114 | phead = get_list_head(pfree_recv_queue); | |
115 | plist = get_next(phead); | |
116 | precvframe = LIST_CONTAINOR(plist, union recv_frame, u); | |
117 | list_delete(&precvframe->u.hdr.list); | |
118 | padapter = precvframe->u.hdr.adapter; | |
119 | if (padapter != NULL) { | |
120 | precvpriv = &padapter->recvpriv; | |
121 | if (pfree_recv_queue == &precvpriv->free_recv_queue) | |
122 | precvpriv->free_recvframe_cnt--; | |
123 | } | |
124 | } | |
125 | spin_unlock_irqrestore(&pfree_recv_queue->lock, irqL); | |
126 | return precvframe; | |
127 | } | |
128 | ||
129 | union recv_frame *dequeue_recvframe(struct __queue *queue) | |
130 | { | |
131 | return r8712_alloc_recvframe(queue); | |
132 | } | |
133 | ||
134 | sint enqueue_recvframe(union recv_frame *precvframe, struct __queue *queue) | |
135 | { | |
136 | unsigned long irqL; | |
137 | struct _adapter *padapter = precvframe->u.hdr.adapter; | |
138 | struct recv_priv *precvpriv = &padapter->recvpriv; | |
139 | ||
140 | spin_lock_irqsave(&queue->lock, irqL); | |
141 | list_delete(&(precvframe->u.hdr.list)); | |
142 | list_insert_tail(&(precvframe->u.hdr.list), get_list_head(queue)); | |
143 | if (padapter != NULL) { | |
144 | if (queue == &precvpriv->free_recv_queue) | |
145 | precvpriv->free_recvframe_cnt++; | |
146 | } | |
147 | spin_unlock_irqrestore(&queue->lock, irqL); | |
148 | return _SUCCESS; | |
149 | } | |
150 | ||
151 | /* | |
152 | caller : defrag; recvframe_chk_defrag in recv_thread (passive) | |
153 | pframequeue: defrag_queue : will be accessed in recv_thread (passive) | |
154 | ||
155 | using spin_lock to protect | |
156 | ||
157 | */ | |
158 | ||
159 | void r8712_free_recvframe_queue(struct __queue *pframequeue, | |
160 | struct __queue *pfree_recv_queue) | |
161 | { | |
162 | union recv_frame *precvframe; | |
163 | struct list_head *plist, *phead; | |
164 | ||
165 | spin_lock(&pframequeue->lock); | |
166 | phead = get_list_head(pframequeue); | |
167 | plist = get_next(phead); | |
168 | while (end_of_queue_search(phead, plist) == false) { | |
169 | precvframe = LIST_CONTAINOR(plist, union recv_frame, u); | |
170 | plist = get_next(plist); | |
171 | r8712_free_recvframe(precvframe, pfree_recv_queue); | |
172 | } | |
173 | spin_unlock(&pframequeue->lock); | |
174 | } | |
175 | ||
176 | sint r8712_recvframe_chkmic(struct _adapter *adapter, | |
177 | union recv_frame *precvframe) | |
178 | { | |
179 | sint i, res = _SUCCESS; | |
180 | u32 datalen; | |
181 | u8 miccode[8]; | |
182 | u8 bmic_err = false; | |
183 | u8 *pframe, *payload, *pframemic; | |
184 | u8 *mickey, idx, *iv; | |
185 | struct sta_info *stainfo; | |
186 | struct rx_pkt_attrib *prxattrib = &precvframe->u.hdr.attrib; | |
187 | struct security_priv *psecuritypriv = &adapter->securitypriv; | |
188 | ||
189 | stainfo = r8712_get_stainfo(&adapter->stapriv, &prxattrib->ta[0]); | |
190 | if (prxattrib->encrypt == _TKIP_) { | |
191 | /* calculate mic code */ | |
192 | if (stainfo != NULL) { | |
193 | if (IS_MCAST(prxattrib->ra)) { | |
194 | iv = precvframe->u.hdr.rx_data + | |
195 | prxattrib->hdrlen; | |
196 | idx = iv[3]; | |
197 | mickey = &psecuritypriv->XGrprxmickey[(((idx >> | |
198 | 6) & 0x3)) - 1].skey[0]; | |
199 | if (psecuritypriv->binstallGrpkey == false) | |
200 | return _FAIL; | |
201 | } else | |
202 | mickey = &stainfo->tkiprxmickey.skey[0]; | |
203 | /*icv_len included the mic code*/ | |
204 | datalen = precvframe->u.hdr.len - prxattrib->hdrlen - | |
205 | prxattrib->iv_len - prxattrib->icv_len - 8; | |
206 | pframe = precvframe->u.hdr.rx_data; | |
207 | payload = pframe + prxattrib->hdrlen + | |
208 | prxattrib->iv_len; | |
209 | seccalctkipmic(mickey, pframe, payload, datalen, | |
210 | &miccode[0], | |
211 | (unsigned char)prxattrib->priority); | |
212 | pframemic = payload + datalen; | |
213 | bmic_err = false; | |
214 | for (i = 0; i < 8; i++) { | |
215 | if (miccode[i] != *(pframemic + i)) | |
216 | bmic_err = true; | |
217 | } | |
218 | if (bmic_err == true) { | |
219 | if (prxattrib->bdecrypted == true) | |
220 | r8712_handle_tkip_mic_err(adapter, | |
221 | (u8)IS_MCAST(prxattrib->ra)); | |
222 | res = _FAIL; | |
223 | } else { | |
224 | /* mic checked ok */ | |
225 | if ((psecuritypriv->bcheck_grpkey == | |
226 | false) && (IS_MCAST(prxattrib->ra) == | |
227 | true)) | |
228 | psecuritypriv->bcheck_grpkey = true; | |
229 | } | |
230 | recvframe_pull_tail(precvframe, 8); | |
231 | } | |
232 | } | |
233 | return res; | |
234 | } | |
235 | ||
236 | /* decrypt and set the ivlen,icvlen of the recv_frame */ | |
237 | union recv_frame *r8712_decryptor(struct _adapter *padapter, | |
238 | union recv_frame *precv_frame) | |
239 | { | |
240 | struct rx_pkt_attrib *prxattrib = &precv_frame->u.hdr.attrib; | |
241 | struct security_priv *psecuritypriv = &padapter->securitypriv; | |
242 | union recv_frame *return_packet = precv_frame; | |
243 | ||
244 | if ((prxattrib->encrypt > 0) && ((prxattrib->bdecrypted == 0) || | |
245 | (psecuritypriv->sw_decrypt == true))) { | |
246 | psecuritypriv->hw_decrypted = false; | |
247 | switch (prxattrib->encrypt) { | |
248 | case _WEP40_: | |
249 | case _WEP104_: | |
250 | r8712_wep_decrypt(padapter, (u8 *)precv_frame); | |
251 | break; | |
252 | case _TKIP_: | |
253 | r8712_tkip_decrypt(padapter, (u8 *)precv_frame); | |
254 | break; | |
255 | case _AES_: | |
256 | r8712_aes_decrypt(padapter, (u8 *)precv_frame); | |
257 | break; | |
258 | default: | |
259 | break; | |
260 | } | |
261 | } else if (prxattrib->bdecrypted == 1) | |
262 | psecuritypriv->hw_decrypted = true; | |
263 | return return_packet; | |
264 | } | |
265 | /*###set the security information in the recv_frame */ | |
266 | union recv_frame *r8712_portctrl(struct _adapter *adapter, | |
267 | union recv_frame *precv_frame) | |
268 | { | |
269 | u8 *psta_addr, *ptr; | |
270 | uint auth_alg; | |
271 | struct recv_frame_hdr *pfhdr; | |
272 | struct sta_info *psta; | |
273 | struct sta_priv *pstapriv; | |
274 | union recv_frame *prtnframe; | |
275 | u16 ether_type = 0; | |
276 | ||
277 | pstapriv = &adapter->stapriv; | |
278 | ptr = get_recvframe_data(precv_frame); | |
279 | pfhdr = &precv_frame->u.hdr; | |
280 | psta_addr = pfhdr->attrib.ta; | |
281 | psta = r8712_get_stainfo(pstapriv, psta_addr); | |
282 | auth_alg = adapter->securitypriv.AuthAlgrthm; | |
283 | if (auth_alg == 2) { | |
284 | if ((psta != NULL) && (psta->ieee8021x_blocked)) { | |
285 | /* blocked | |
286 | * only accept EAPOL frame */ | |
287 | prtnframe = precv_frame; | |
288 | /*get ether_type */ | |
289 | ptr = ptr + pfhdr->attrib.hdrlen + | |
290 | pfhdr->attrib.iv_len + LLC_HEADER_SIZE; | |
291 | memcpy(ðer_type, ptr, 2); | |
292 | ether_type = ntohs((unsigned short)ether_type); | |
293 | if (ether_type == 0x888e) | |
294 | prtnframe = precv_frame; | |
295 | else { | |
296 | /*free this frame*/ | |
297 | r8712_free_recvframe(precv_frame, | |
298 | &adapter->recvpriv.free_recv_queue); | |
299 | prtnframe = NULL; | |
300 | } | |
301 | } else { | |
302 | /* allowed | |
303 | * check decryption status, and decrypt the | |
304 | * frame if needed */ | |
305 | prtnframe = precv_frame; | |
306 | /* check is the EAPOL frame or not (Rekey) */ | |
307 | if (ether_type == 0x888e) { | |
308 | /* check Rekey */ | |
309 | prtnframe = precv_frame; | |
310 | } | |
311 | } | |
312 | } else | |
313 | prtnframe = precv_frame; | |
314 | return prtnframe; | |
315 | } | |
316 | ||
317 | sint recv_decache(union recv_frame *precv_frame, u8 bretry, | |
318 | struct stainfo_rxcache *prxcache) | |
319 | { | |
320 | sint tid = precv_frame->u.hdr.attrib.priority; | |
321 | u16 seq_ctrl = ((precv_frame->u.hdr.attrib.seq_num&0xffff) << 4) | | |
322 | (precv_frame->u.hdr.attrib.frag_num & 0xf); | |
323 | ||
324 | if (tid > 15) | |
325 | return _FAIL; | |
326 | if (seq_ctrl == prxcache->tid_rxseq[tid]) | |
327 | return _FAIL; | |
328 | prxcache->tid_rxseq[tid] = seq_ctrl; | |
329 | return _SUCCESS; | |
330 | } | |
331 | ||
332 | sint sta2sta_data_frame(struct _adapter *adapter, union recv_frame *precv_frame, | |
333 | struct sta_info **psta | |
334 | ) | |
335 | { | |
336 | u8 *ptr = precv_frame->u.hdr.rx_data; | |
337 | sint ret = _SUCCESS; | |
338 | struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib; | |
339 | struct sta_priv *pstapriv = &adapter->stapriv; | |
340 | struct mlme_priv *pmlmepriv = &adapter->mlmepriv; | |
341 | u8 *mybssid = get_bssid(pmlmepriv); | |
342 | u8 *myhwaddr = myid(&adapter->eeprompriv); | |
343 | u8 *sta_addr = NULL; | |
344 | sint bmcast = IS_MCAST(pattrib->dst); | |
345 | ||
346 | if ((check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) == true) || | |
347 | (check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE) == true)) { | |
348 | /* filter packets that SA is myself or multicast or broadcast */ | |
349 | if (!memcmp(myhwaddr, pattrib->src, ETH_ALEN)) | |
350 | return _FAIL; | |
351 | if ((memcmp(myhwaddr, pattrib->dst, ETH_ALEN)) && (!bmcast)) | |
352 | return _FAIL; | |
353 | if (!memcmp(pattrib->bssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) || | |
354 | !memcmp(mybssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) || | |
355 | (memcmp(pattrib->bssid, mybssid, ETH_ALEN))) | |
356 | return _FAIL; | |
357 | sta_addr = pattrib->src; | |
358 | } else if (check_fwstate(pmlmepriv, WIFI_STATION_STATE) == true) { | |
359 | /* For Station mode, sa and bssid should always be BSSID, | |
360 | * and DA is my mac-address */ | |
361 | if (memcmp(pattrib->bssid, pattrib->src, ETH_ALEN)) | |
362 | return _FAIL; | |
363 | sta_addr = pattrib->bssid; | |
364 | } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE) == true) { | |
365 | if (bmcast) { | |
366 | /* For AP mode, if DA == MCAST, then BSSID should | |
367 | * be also MCAST */ | |
368 | if (!IS_MCAST(pattrib->bssid)) | |
369 | return _FAIL; | |
370 | } else { /* not mc-frame */ | |
371 | /* For AP mode, if DA is non-MCAST, then it must be | |
372 | * BSSID, and bssid == BSSID */ | |
373 | if (memcmp(pattrib->bssid, pattrib->dst, ETH_ALEN)) | |
374 | return _FAIL; | |
375 | sta_addr = pattrib->src; | |
376 | } | |
377 | } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE) == true) { | |
378 | memcpy(pattrib->dst, GetAddr1Ptr(ptr), ETH_ALEN); | |
379 | memcpy(pattrib->src, GetAddr2Ptr(ptr), ETH_ALEN); | |
380 | memcpy(pattrib->bssid, GetAddr3Ptr(ptr), ETH_ALEN); | |
381 | memcpy(pattrib->ra, pattrib->dst, ETH_ALEN); | |
382 | memcpy(pattrib->ta, pattrib->src, ETH_ALEN); | |
383 | sta_addr = mybssid; | |
384 | } else | |
385 | ret = _FAIL; | |
386 | if (bmcast) | |
387 | *psta = r8712_get_bcmc_stainfo(adapter); | |
388 | else | |
389 | *psta = r8712_get_stainfo(pstapriv, sta_addr); /* get ap_info */ | |
390 | if (*psta == NULL) { | |
391 | if (check_fwstate(pmlmepriv, WIFI_MP_STATE) == true) | |
392 | adapter->mppriv.rx_pktloss++; | |
393 | return _FAIL; | |
394 | } | |
395 | return ret; | |
396 | } | |
397 | ||
398 | sint ap2sta_data_frame(struct _adapter *adapter, union recv_frame *precv_frame, | |
399 | struct sta_info **psta) | |
400 | { | |
401 | u8 *ptr = precv_frame->u.hdr.rx_data; | |
402 | struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib; | |
403 | struct sta_priv *pstapriv = &adapter->stapriv; | |
404 | struct mlme_priv *pmlmepriv = &adapter->mlmepriv; | |
405 | u8 *mybssid = get_bssid(pmlmepriv); | |
406 | u8 *myhwaddr = myid(&adapter->eeprompriv); | |
407 | sint bmcast = IS_MCAST(pattrib->dst); | |
408 | ||
409 | if ((check_fwstate(pmlmepriv, WIFI_STATION_STATE) == true) | |
410 | && (check_fwstate(pmlmepriv, _FW_LINKED) == true)) { | |
411 | /* if NULL-frame, drop packet */ | |
412 | if ((GetFrameSubType(ptr)) == WIFI_DATA_NULL) | |
413 | return _FAIL; | |
414 | /* drop QoS-SubType Data, including QoS NULL, | |
415 | * excluding QoS-Data */ | |
416 | if ((GetFrameSubType(ptr) & WIFI_QOS_DATA_TYPE) == | |
417 | WIFI_QOS_DATA_TYPE) { | |
418 | if (GetFrameSubType(ptr) & (BIT(4) | BIT(5) | BIT(6))) | |
419 | return _FAIL; | |
420 | } | |
421 | ||
422 | /* filter packets that SA is myself or multicast or broadcast */ | |
423 | if (!memcmp(myhwaddr, pattrib->src, ETH_ALEN)) | |
424 | return _FAIL; | |
425 | ||
426 | /* da should be for me */ | |
427 | if ((memcmp(myhwaddr, pattrib->dst, ETH_ALEN)) && (!bmcast)) | |
428 | return _FAIL; | |
429 | /* check BSSID */ | |
430 | if (!memcmp(pattrib->bssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) || | |
431 | !memcmp(mybssid, "\x0\x0\x0\x0\x0\x0", ETH_ALEN) || | |
432 | (memcmp(pattrib->bssid, mybssid, ETH_ALEN))) | |
433 | return _FAIL; | |
434 | if (bmcast) | |
435 | *psta = r8712_get_bcmc_stainfo(adapter); | |
436 | else | |
437 | *psta = r8712_get_stainfo(pstapriv, pattrib->bssid); | |
438 | if (*psta == NULL) | |
439 | return _FAIL; | |
440 | } else if ((check_fwstate(pmlmepriv, WIFI_MP_STATE) == true) && | |
441 | (check_fwstate(pmlmepriv, _FW_LINKED) == true)) { | |
442 | memcpy(pattrib->dst, GetAddr1Ptr(ptr), ETH_ALEN); | |
443 | memcpy(pattrib->src, GetAddr2Ptr(ptr), ETH_ALEN); | |
444 | memcpy(pattrib->bssid, GetAddr3Ptr(ptr), ETH_ALEN); | |
445 | memcpy(pattrib->ra, pattrib->dst, ETH_ALEN); | |
446 | memcpy(pattrib->ta, pattrib->src, ETH_ALEN); | |
447 | memcpy(pattrib->bssid, mybssid, ETH_ALEN); | |
448 | *psta = r8712_get_stainfo(pstapriv, pattrib->bssid); | |
449 | if (*psta == NULL) | |
450 | return _FAIL; | |
451 | } else | |
452 | return _FAIL; | |
453 | return _SUCCESS; | |
454 | } | |
455 | ||
456 | sint sta2ap_data_frame(struct _adapter *adapter, union recv_frame *precv_frame, | |
457 | struct sta_info **psta) | |
458 | { | |
459 | struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib; | |
460 | struct sta_priv *pstapriv = &adapter->stapriv; | |
461 | struct mlme_priv *pmlmepriv = &adapter->mlmepriv; | |
462 | unsigned char *mybssid = get_bssid(pmlmepriv); | |
463 | ||
464 | if (check_fwstate(pmlmepriv, WIFI_AP_STATE) == true) { | |
465 | /* For AP mode, if DA is non-MCAST, then it must be BSSID, | |
466 | * and bssid == BSSID | |
467 | * For AP mode, RA=BSSID, TX=STA(SRC_ADDR), A3=DST_ADDR */ | |
468 | if (memcmp(pattrib->bssid, mybssid, ETH_ALEN)) | |
469 | return _FAIL; | |
470 | *psta = r8712_get_stainfo(pstapriv, pattrib->src); | |
471 | if (*psta == NULL) | |
472 | return _FAIL; | |
473 | } | |
474 | return _SUCCESS; | |
475 | } | |
476 | ||
477 | sint validate_recv_ctrl_frame(struct _adapter *adapter, | |
478 | union recv_frame *precv_frame) | |
479 | { | |
480 | return _FAIL; | |
481 | } | |
482 | ||
483 | sint validate_recv_mgnt_frame(struct _adapter *adapter, | |
484 | union recv_frame *precv_frame) | |
485 | { | |
486 | return _FAIL; | |
487 | } | |
488 | ||
489 | ||
490 | sint validate_recv_data_frame(struct _adapter *adapter, | |
491 | union recv_frame *precv_frame) | |
492 | { | |
493 | int res; | |
494 | u8 bretry; | |
495 | u8 *psa, *pda, *pbssid; | |
496 | struct sta_info *psta = NULL; | |
497 | u8 *ptr = precv_frame->u.hdr.rx_data; | |
498 | struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib; | |
499 | struct security_priv *psecuritypriv = &adapter->securitypriv; | |
500 | ||
501 | bretry = GetRetry(ptr); | |
502 | pda = get_da(ptr); | |
503 | psa = get_sa(ptr); | |
504 | pbssid = get_hdr_bssid(ptr); | |
505 | if (pbssid == NULL) | |
506 | return _FAIL; | |
507 | memcpy(pattrib->dst, pda, ETH_ALEN); | |
508 | memcpy(pattrib->src, psa, ETH_ALEN); | |
509 | memcpy(pattrib->bssid, pbssid, ETH_ALEN); | |
510 | switch (pattrib->to_fr_ds) { | |
511 | case 0: | |
512 | memcpy(pattrib->ra, pda, ETH_ALEN); | |
513 | memcpy(pattrib->ta, psa, ETH_ALEN); | |
514 | res = sta2sta_data_frame(adapter, precv_frame, &psta); | |
515 | break; | |
516 | case 1: | |
517 | memcpy(pattrib->ra, pda, ETH_ALEN); | |
518 | memcpy(pattrib->ta, pbssid, ETH_ALEN); | |
519 | res = ap2sta_data_frame(adapter, precv_frame, &psta); | |
520 | break; | |
521 | case 2: | |
522 | memcpy(pattrib->ra, pbssid, ETH_ALEN); | |
523 | memcpy(pattrib->ta, psa, ETH_ALEN); | |
524 | res = sta2ap_data_frame(adapter, precv_frame, &psta); | |
525 | break; | |
526 | case 3: | |
527 | memcpy(pattrib->ra, GetAddr1Ptr(ptr), ETH_ALEN); | |
528 | memcpy(pattrib->ta, GetAddr2Ptr(ptr), ETH_ALEN); | |
529 | return _FAIL; | |
530 | default: | |
531 | return _FAIL; | |
532 | } | |
533 | if (res == _FAIL) | |
534 | return _FAIL; | |
535 | if (psta == NULL) | |
536 | return _FAIL; | |
537 | else | |
538 | precv_frame->u.hdr.psta = psta; | |
539 | pattrib->amsdu = 0; | |
540 | /* parsing QC field */ | |
541 | if (pattrib->qos == 1) { | |
542 | pattrib->priority = GetPriority((ptr + 24)); | |
543 | pattrib->ack_policy = GetAckpolicy((ptr + 24)); | |
544 | pattrib->amsdu = GetAMsdu((ptr + 24)); | |
545 | pattrib->hdrlen = pattrib->to_fr_ds == 3 ? 32 : 26; | |
546 | } else { | |
547 | pattrib->priority = 0; | |
548 | pattrib->hdrlen = (pattrib->to_fr_ds == 3) ? 30 : 24; | |
549 | } | |
550 | ||
551 | if (pattrib->order)/*HT-CTRL 11n*/ | |
552 | pattrib->hdrlen += 4; | |
553 | precv_frame->u.hdr.preorder_ctrl = | |
554 | &psta->recvreorder_ctrl[pattrib->priority]; | |
555 | ||
556 | /* decache, drop duplicate recv packets */ | |
557 | if (recv_decache(precv_frame, bretry, &psta->sta_recvpriv.rxcache) == | |
558 | _FAIL) | |
559 | return _FAIL; | |
560 | ||
561 | if (pattrib->privacy) { | |
562 | GET_ENCRY_ALGO(psecuritypriv, psta, pattrib->encrypt, | |
563 | IS_MCAST(pattrib->ra)); | |
564 | SET_ICE_IV_LEN(pattrib->iv_len, pattrib->icv_len, | |
565 | pattrib->encrypt); | |
566 | } else { | |
567 | pattrib->encrypt = 0; | |
568 | pattrib->iv_len = pattrib->icv_len = 0; | |
569 | } | |
570 | return _SUCCESS; | |
571 | } | |
572 | ||
573 | sint r8712_validate_recv_frame(struct _adapter *adapter, | |
574 | union recv_frame *precv_frame) | |
575 | { | |
576 | /*shall check frame subtype, to / from ds, da, bssid */ | |
577 | /*then call check if rx seq/frag. duplicated.*/ | |
578 | ||
579 | u8 type; | |
580 | u8 subtype; | |
581 | sint retval = _SUCCESS; | |
582 | struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib; | |
583 | ||
584 | u8 *ptr = precv_frame->u.hdr.rx_data; | |
585 | u8 ver = (unsigned char)(*ptr) & 0x3; | |
586 | ||
587 | /*add version chk*/ | |
588 | if (ver != 0) | |
589 | return _FAIL; | |
590 | type = GetFrameType(ptr); | |
591 | subtype = GetFrameSubType(ptr); /*bit(7)~bit(2)*/ | |
592 | pattrib->to_fr_ds = get_tofr_ds(ptr); | |
593 | pattrib->frag_num = GetFragNum(ptr); | |
594 | pattrib->seq_num = GetSequence(ptr); | |
595 | pattrib->pw_save = GetPwrMgt(ptr); | |
596 | pattrib->mfrag = GetMFrag(ptr); | |
597 | pattrib->mdata = GetMData(ptr); | |
598 | pattrib->privacy = GetPrivacy(ptr); | |
599 | pattrib->order = GetOrder(ptr); | |
600 | switch (type) { | |
601 | case WIFI_MGT_TYPE: /*mgnt*/ | |
602 | retval = validate_recv_mgnt_frame(adapter, precv_frame); | |
603 | break; | |
604 | case WIFI_CTRL_TYPE:/*ctrl*/ | |
605 | retval = validate_recv_ctrl_frame(adapter, precv_frame); | |
606 | break; | |
607 | case WIFI_DATA_TYPE: /*data*/ | |
608 | pattrib->qos = (subtype & BIT(7)) ? 1 : 0; | |
609 | retval = validate_recv_data_frame(adapter, precv_frame); | |
610 | break; | |
611 | default: | |
612 | return _FAIL; | |
613 | } | |
614 | return retval; | |
615 | } | |
616 | ||
617 | sint r8712_wlanhdr_to_ethhdr(union recv_frame *precvframe) | |
618 | { | |
619 | /*remove the wlanhdr and add the eth_hdr*/ | |
620 | sint rmv_len; | |
621 | u16 eth_type, len; | |
622 | u8 bsnaphdr; | |
623 | u8 *psnap_type; | |
624 | struct ieee80211_snap_hdr *psnap; | |
625 | ||
626 | sint ret = _SUCCESS; | |
627 | struct _adapter *adapter = precvframe->u.hdr.adapter; | |
628 | struct mlme_priv *pmlmepriv = &adapter->mlmepriv; | |
629 | ||
630 | u8 *ptr = get_recvframe_data(precvframe); /*point to frame_ctrl field*/ | |
631 | struct rx_pkt_attrib *pattrib = &precvframe->u.hdr.attrib; | |
632 | ||
633 | if (pattrib->encrypt) | |
634 | recvframe_pull_tail(precvframe, pattrib->icv_len); | |
635 | psnap = (struct ieee80211_snap_hdr *)(ptr + pattrib->hdrlen + | |
636 | pattrib->iv_len); | |
637 | psnap_type = ptr + pattrib->hdrlen + pattrib->iv_len + SNAP_SIZE; | |
638 | /* convert hdr + possible LLC headers into Ethernet header */ | |
639 | if ((!memcmp(psnap, (void *)rfc1042_header, SNAP_SIZE) && | |
640 | (memcmp(psnap_type, (void *)SNAP_ETH_TYPE_IPX, 2)) && | |
641 | (memcmp(psnap_type, (void *)SNAP_ETH_TYPE_APPLETALK_AARP, 2))) || | |
642 | !memcmp(psnap, (void *)bridge_tunnel_header, SNAP_SIZE)) { | |
643 | /* remove RFC1042 or Bridge-Tunnel encapsulation and | |
644 | * replace EtherType */ | |
645 | bsnaphdr = true; | |
646 | } else { | |
647 | /* Leave Ethernet header part of hdr and full payload */ | |
648 | bsnaphdr = false; | |
649 | } | |
650 | rmv_len = pattrib->hdrlen + pattrib->iv_len + | |
651 | (bsnaphdr ? SNAP_SIZE : 0); | |
652 | len = precvframe->u.hdr.len - rmv_len; | |
653 | if ((check_fwstate(pmlmepriv, WIFI_MP_STATE) == true)) { | |
654 | ptr += rmv_len; | |
655 | *ptr = 0x87; | |
656 | *(ptr+1) = 0x12; | |
657 | eth_type = 0x8712; | |
658 | /* append rx status for mp test packets */ | |
659 | ptr = recvframe_pull(precvframe, (rmv_len - | |
660 | sizeof(struct ethhdr) + 2) - 24); | |
661 | memcpy(ptr, get_rxmem(precvframe), 24); | |
662 | ptr += 24; | |
663 | } else | |
664 | ptr = recvframe_pull(precvframe, (rmv_len - | |
665 | sizeof(struct ethhdr) + (bsnaphdr ? 2 : 0))); | |
666 | ||
667 | memcpy(ptr, pattrib->dst, ETH_ALEN); | |
668 | memcpy(ptr+ETH_ALEN, pattrib->src, ETH_ALEN); | |
669 | if (!bsnaphdr) { | |
670 | len = htons(len); | |
671 | memcpy(ptr + 12, &len, 2); | |
672 | } | |
673 | return ret; | |
674 | } | |
675 | ||
676 | s32 r8712_recv_entry(union recv_frame *precvframe) | |
677 | { | |
678 | struct _adapter *padapter; | |
679 | struct recv_priv *precvpriv; | |
680 | struct mlme_priv *pmlmepriv; | |
681 | struct recv_stat *prxstat; | |
682 | struct dvobj_priv *pdev; | |
683 | u8 *phead, *pdata, *ptail, *pend; | |
684 | ||
685 | struct __queue *pfree_recv_queue, *ppending_recv_queue; | |
686 | s32 ret = _SUCCESS; | |
687 | struct intf_hdl *pintfhdl; | |
688 | ||
689 | padapter = precvframe->u.hdr.adapter; | |
690 | pintfhdl = &padapter->pio_queue->intf; | |
691 | pmlmepriv = &padapter->mlmepriv; | |
692 | precvpriv = &(padapter->recvpriv); | |
693 | pdev = &padapter->dvobjpriv; | |
694 | pfree_recv_queue = &(precvpriv->free_recv_queue); | |
695 | ppending_recv_queue = &(precvpriv->recv_pending_queue); | |
696 | phead = precvframe->u.hdr.rx_head; | |
697 | pdata = precvframe->u.hdr.rx_data; | |
698 | ptail = precvframe->u.hdr.rx_tail; | |
699 | pend = precvframe->u.hdr.rx_end; | |
700 | prxstat = (struct recv_stat *)phead; | |
701 | ||
702 | padapter->ledpriv.LedControlHandler(padapter, LED_CTL_RX); | |
703 | ||
704 | ret = recv_func(padapter, precvframe); | |
705 | if (ret == _FAIL) | |
706 | goto _recv_entry_drop; | |
707 | precvpriv->rx_pkts++; | |
708 | precvpriv->rx_bytes += (uint)(precvframe->u.hdr.rx_tail - | |
709 | precvframe->u.hdr.rx_data); | |
710 | return ret; | |
711 | _recv_entry_drop: | |
712 | precvpriv->rx_drop++; | |
713 | padapter->mppriv.rx_pktloss = precvpriv->rx_drop; | |
714 | return ret; | |
715 | } |