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2865d42c LF |
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 | ||
20467825 | 31 | #include <linux/ip.h> |
5d3da4a2 | 32 | #include <linux/slab.h> |
be9a1204 | 33 | #include <linux/if_ether.h> |
5d3da4a2 | 34 | #include <linux/kmemleak.h> |
1e9ee6f7 | 35 | #include <linux/etherdevice.h> |
5d3da4a2 | 36 | |
2865d42c LF |
37 | #include "osdep_service.h" |
38 | #include "drv_types.h" | |
39 | #include "recv_osdep.h" | |
40 | #include "mlme_osdep.h" | |
2865d42c LF |
41 | #include "ethernet.h" |
42 | #include "usb_ops.h" | |
43 | #include "wifi.h" | |
44 | ||
45 | static const u8 SNAP_ETH_TYPE_IPX[2] = {0x81, 0x37}; | |
46 | ||
47 | /* Datagram Delivery Protocol */ | |
48 | static const u8 SNAP_ETH_TYPE_APPLETALK_AARP[2] = {0x80, 0xf3}; | |
49 | ||
50 | /* Bridge-Tunnel header (for EtherTypes ETH_P_AARP and ETH_P_IPX) */ | |
51 | static const u8 bridge_tunnel_header[] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0xf8}; | |
52 | ||
53 | /* Ethernet-II snap header (RFC1042 for most EtherTypes) */ | |
54 | static const u8 rfc1042_header[] = {0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00}; | |
55 | ||
56 | void _r8712_init_sta_recv_priv(struct sta_recv_priv *psta_recvpriv) | |
57 | { | |
58 | memset((u8 *)psta_recvpriv, 0, sizeof(struct sta_recv_priv)); | |
59 | spin_lock_init(&psta_recvpriv->lock); | |
60 | _init_queue(&psta_recvpriv->defrag_q); | |
61 | } | |
62 | ||
63 | sint _r8712_init_recv_priv(struct recv_priv *precvpriv, | |
64 | struct _adapter *padapter) | |
65 | { | |
66 | sint i; | |
67 | union recv_frame *precvframe; | |
68 | ||
69 | memset((unsigned char *)precvpriv, 0, sizeof(struct recv_priv)); | |
70 | spin_lock_init(&precvpriv->lock); | |
71 | _init_queue(&precvpriv->free_recv_queue); | |
72 | _init_queue(&precvpriv->recv_pending_queue); | |
73 | precvpriv->adapter = padapter; | |
74 | precvpriv->free_recvframe_cnt = NR_RECVFRAME; | |
91d435fe | 75 | precvpriv->pallocated_frame_buf = kmalloc(NR_RECVFRAME * |
57b6686e TP |
76 | sizeof(union recv_frame) + RXFRAME_ALIGN_SZ, |
77 | GFP_ATOMIC); | |
2865d42c LF |
78 | if (precvpriv->pallocated_frame_buf == NULL) |
79 | return _FAIL; | |
5d3da4a2 | 80 | kmemleak_not_leak(precvpriv->pallocated_frame_buf); |
2865d42c LF |
81 | memset(precvpriv->pallocated_frame_buf, 0, NR_RECVFRAME * |
82 | sizeof(union recv_frame) + RXFRAME_ALIGN_SZ); | |
83 | precvpriv->precv_frame_buf = precvpriv->pallocated_frame_buf + | |
84 | RXFRAME_ALIGN_SZ - | |
85 | ((addr_t)(precvpriv->pallocated_frame_buf) & | |
4ef2de5a | 86 | (RXFRAME_ALIGN_SZ - 1)); |
2865d42c LF |
87 | precvframe = (union recv_frame *)precvpriv->precv_frame_buf; |
88 | for (i = 0; i < NR_RECVFRAME; i++) { | |
534c4acd | 89 | INIT_LIST_HEAD(&(precvframe->u.list)); |
fdfbf789 | 90 | list_add_tail(&(precvframe->u.list), |
2865d42c LF |
91 | &(precvpriv->free_recv_queue.queue)); |
92 | r8712_os_recv_resource_alloc(padapter, precvframe); | |
93 | precvframe->u.hdr.adapter = padapter; | |
94 | precvframe++; | |
95 | } | |
96 | precvpriv->rx_pending_cnt = 1; | |
2865d42c LF |
97 | return r8712_init_recv_priv(precvpriv, padapter); |
98 | } | |
99 | ||
100 | void _r8712_free_recv_priv(struct recv_priv *precvpriv) | |
101 | { | |
102 | kfree(precvpriv->pallocated_frame_buf); | |
103 | r8712_free_recv_priv(precvpriv); | |
104 | } | |
105 | ||
106 | union recv_frame *r8712_alloc_recvframe(struct __queue *pfree_recv_queue) | |
107 | { | |
108 | unsigned long irqL; | |
109 | union recv_frame *precvframe; | |
110 | struct list_head *plist, *phead; | |
111 | struct _adapter *padapter; | |
112 | struct recv_priv *precvpriv; | |
113 | ||
114 | spin_lock_irqsave(&pfree_recv_queue->lock, irqL); | |
168a2c10 | 115 | if (list_empty(&pfree_recv_queue->queue)) { |
2865d42c | 116 | precvframe = NULL; |
168a2c10 | 117 | } else { |
e99a428a | 118 | phead = &pfree_recv_queue->queue; |
849fb0a8 | 119 | plist = phead->next; |
2865d42c | 120 | precvframe = LIST_CONTAINOR(plist, union recv_frame, u); |
29197b7c | 121 | list_del_init(&precvframe->u.hdr.list); |
2865d42c LF |
122 | padapter = precvframe->u.hdr.adapter; |
123 | if (padapter != NULL) { | |
124 | precvpriv = &padapter->recvpriv; | |
125 | if (pfree_recv_queue == &precvpriv->free_recv_queue) | |
126 | precvpriv->free_recvframe_cnt--; | |
127 | } | |
128 | } | |
129 | spin_unlock_irqrestore(&pfree_recv_queue->lock, irqL); | |
130 | return precvframe; | |
131 | } | |
132 | ||
2865d42c LF |
133 | /* |
134 | caller : defrag; recvframe_chk_defrag in recv_thread (passive) | |
135 | pframequeue: defrag_queue : will be accessed in recv_thread (passive) | |
136 | ||
137 | using spin_lock to protect | |
138 | ||
139 | */ | |
140 | ||
141 | void r8712_free_recvframe_queue(struct __queue *pframequeue, | |
142 | struct __queue *pfree_recv_queue) | |
143 | { | |
144 | union recv_frame *precvframe; | |
145 | struct list_head *plist, *phead; | |
146 | ||
147 | spin_lock(&pframequeue->lock); | |
e99a428a | 148 | phead = &pframequeue->queue; |
849fb0a8 | 149 | plist = phead->next; |
1ca96884 | 150 | while (!end_of_queue_search(phead, plist)) { |
2865d42c | 151 | precvframe = LIST_CONTAINOR(plist, union recv_frame, u); |
849fb0a8 | 152 | plist = plist->next; |
2865d42c LF |
153 | r8712_free_recvframe(precvframe, pfree_recv_queue); |
154 | } | |
155 | spin_unlock(&pframequeue->lock); | |
156 | } | |
157 | ||
158 | sint r8712_recvframe_chkmic(struct _adapter *adapter, | |
159 | union recv_frame *precvframe) | |
160 | { | |
161 | sint i, res = _SUCCESS; | |
162 | u32 datalen; | |
163 | u8 miccode[8]; | |
164 | u8 bmic_err = false; | |
165 | u8 *pframe, *payload, *pframemic; | |
166 | u8 *mickey, idx, *iv; | |
167 | struct sta_info *stainfo; | |
168 | struct rx_pkt_attrib *prxattrib = &precvframe->u.hdr.attrib; | |
169 | struct security_priv *psecuritypriv = &adapter->securitypriv; | |
170 | ||
171 | stainfo = r8712_get_stainfo(&adapter->stapriv, &prxattrib->ta[0]); | |
172 | if (prxattrib->encrypt == _TKIP_) { | |
173 | /* calculate mic code */ | |
174 | if (stainfo != NULL) { | |
175 | if (IS_MCAST(prxattrib->ra)) { | |
176 | iv = precvframe->u.hdr.rx_data + | |
177 | prxattrib->hdrlen; | |
178 | idx = iv[3]; | |
179 | mickey = &psecuritypriv->XGrprxmickey[(((idx >> | |
180 | 6) & 0x3)) - 1].skey[0]; | |
1ca96884 | 181 | if (!psecuritypriv->binstallGrpkey) |
2865d42c | 182 | return _FAIL; |
168a2c10 | 183 | } else { |
2865d42c | 184 | mickey = &stainfo->tkiprxmickey.skey[0]; |
168a2c10 | 185 | } |
2865d42c LF |
186 | /*icv_len included the mic code*/ |
187 | datalen = precvframe->u.hdr.len - prxattrib->hdrlen - | |
188 | prxattrib->iv_len - prxattrib->icv_len - 8; | |
189 | pframe = precvframe->u.hdr.rx_data; | |
190 | payload = pframe + prxattrib->hdrlen + | |
191 | prxattrib->iv_len; | |
192 | seccalctkipmic(mickey, pframe, payload, datalen, | |
193 | &miccode[0], | |
194 | (unsigned char)prxattrib->priority); | |
195 | pframemic = payload + datalen; | |
196 | bmic_err = false; | |
197 | for (i = 0; i < 8; i++) { | |
198 | if (miccode[i] != *(pframemic + i)) | |
199 | bmic_err = true; | |
200 | } | |
1ca96884 LB |
201 | if (bmic_err) { |
202 | if (prxattrib->bdecrypted) | |
2865d42c LF |
203 | r8712_handle_tkip_mic_err(adapter, |
204 | (u8)IS_MCAST(prxattrib->ra)); | |
205 | res = _FAIL; | |
206 | } else { | |
207 | /* mic checked ok */ | |
1ca96884 LB |
208 | if (!psecuritypriv->bcheck_grpkey && |
209 | IS_MCAST(prxattrib->ra)) | |
2865d42c LF |
210 | psecuritypriv->bcheck_grpkey = true; |
211 | } | |
212 | recvframe_pull_tail(precvframe, 8); | |
213 | } | |
214 | } | |
215 | return res; | |
216 | } | |
217 | ||
218 | /* decrypt and set the ivlen,icvlen of the recv_frame */ | |
219 | union recv_frame *r8712_decryptor(struct _adapter *padapter, | |
220 | union recv_frame *precv_frame) | |
221 | { | |
222 | struct rx_pkt_attrib *prxattrib = &precv_frame->u.hdr.attrib; | |
223 | struct security_priv *psecuritypriv = &padapter->securitypriv; | |
224 | union recv_frame *return_packet = precv_frame; | |
225 | ||
226 | if ((prxattrib->encrypt > 0) && ((prxattrib->bdecrypted == 0) || | |
1ca96884 | 227 | psecuritypriv->sw_decrypt)) { |
2865d42c LF |
228 | psecuritypriv->hw_decrypted = false; |
229 | switch (prxattrib->encrypt) { | |
230 | case _WEP40_: | |
231 | case _WEP104_: | |
232 | r8712_wep_decrypt(padapter, (u8 *)precv_frame); | |
233 | break; | |
234 | case _TKIP_: | |
235 | r8712_tkip_decrypt(padapter, (u8 *)precv_frame); | |
236 | break; | |
237 | case _AES_: | |
238 | r8712_aes_decrypt(padapter, (u8 *)precv_frame); | |
239 | break; | |
240 | default: | |
241 | break; | |
242 | } | |
168a2c10 | 243 | } else if (prxattrib->bdecrypted == 1) { |
2865d42c | 244 | psecuritypriv->hw_decrypted = true; |
168a2c10 | 245 | } |
2865d42c LF |
246 | return return_packet; |
247 | } | |
248 | /*###set the security information in the recv_frame */ | |
249 | union recv_frame *r8712_portctrl(struct _adapter *adapter, | |
250 | union recv_frame *precv_frame) | |
251 | { | |
252 | u8 *psta_addr, *ptr; | |
253 | uint auth_alg; | |
254 | struct recv_frame_hdr *pfhdr; | |
255 | struct sta_info *psta; | |
256 | struct sta_priv *pstapriv; | |
257 | union recv_frame *prtnframe; | |
f764cd68 | 258 | u16 ether_type; |
2865d42c LF |
259 | |
260 | pstapriv = &adapter->stapriv; | |
261 | ptr = get_recvframe_data(precv_frame); | |
262 | pfhdr = &precv_frame->u.hdr; | |
263 | psta_addr = pfhdr->attrib.ta; | |
264 | psta = r8712_get_stainfo(pstapriv, psta_addr); | |
265 | auth_alg = adapter->securitypriv.AuthAlgrthm; | |
266 | if (auth_alg == 2) { | |
f764cd68 LF |
267 | /* get ether_type */ |
268 | ptr = ptr + pfhdr->attrib.hdrlen + LLC_HEADER_SIZE; | |
269 | memcpy(ðer_type, ptr, 2); | |
270 | ether_type = ntohs((unsigned short)ether_type); | |
271 | ||
2865d42c LF |
272 | if ((psta != NULL) && (psta->ieee8021x_blocked)) { |
273 | /* blocked | |
274 | * only accept EAPOL frame */ | |
168a2c10 | 275 | if (ether_type == 0x888e) { |
2865d42c | 276 | prtnframe = precv_frame; |
168a2c10 | 277 | } else { |
2865d42c LF |
278 | /*free this frame*/ |
279 | r8712_free_recvframe(precv_frame, | |
280 | &adapter->recvpriv.free_recv_queue); | |
281 | prtnframe = NULL; | |
282 | } | |
283 | } else { | |
284 | /* allowed | |
285 | * check decryption status, and decrypt the | |
286 | * frame if needed */ | |
287 | prtnframe = precv_frame; | |
288 | /* check is the EAPOL frame or not (Rekey) */ | |
289 | if (ether_type == 0x888e) { | |
290 | /* check Rekey */ | |
291 | prtnframe = precv_frame; | |
292 | } | |
293 | } | |
168a2c10 | 294 | } else { |
2865d42c | 295 | prtnframe = precv_frame; |
168a2c10 | 296 | } |
2865d42c LF |
297 | return prtnframe; |
298 | } | |
299 | ||
16e53729 | 300 | static sint recv_decache(union recv_frame *precv_frame, u8 bretry, |
2865d42c LF |
301 | struct stainfo_rxcache *prxcache) |
302 | { | |
303 | sint tid = precv_frame->u.hdr.attrib.priority; | |
4ef2de5a | 304 | u16 seq_ctrl = ((precv_frame->u.hdr.attrib.seq_num & 0xffff) << 4) | |
2865d42c LF |
305 | (precv_frame->u.hdr.attrib.frag_num & 0xf); |
306 | ||
307 | if (tid > 15) | |
308 | return _FAIL; | |
309 | if (seq_ctrl == prxcache->tid_rxseq[tid]) | |
310 | return _FAIL; | |
311 | prxcache->tid_rxseq[tid] = seq_ctrl; | |
312 | return _SUCCESS; | |
313 | } | |
314 | ||
2657c30e JM |
315 | static sint sta2sta_data_frame(struct _adapter *adapter, |
316 | union recv_frame *precv_frame, | |
317 | struct sta_info **psta) | |
2865d42c LF |
318 | { |
319 | u8 *ptr = precv_frame->u.hdr.rx_data; | |
320 | sint ret = _SUCCESS; | |
321 | struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib; | |
322 | struct sta_priv *pstapriv = &adapter->stapriv; | |
323 | struct mlme_priv *pmlmepriv = &adapter->mlmepriv; | |
324 | u8 *mybssid = get_bssid(pmlmepriv); | |
325 | u8 *myhwaddr = myid(&adapter->eeprompriv); | |
326 | u8 *sta_addr = NULL; | |
327 | sint bmcast = IS_MCAST(pattrib->dst); | |
328 | ||
1ca96884 LB |
329 | if (check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) || |
330 | check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE)) { | |
2865d42c LF |
331 | /* filter packets that SA is myself or multicast or broadcast */ |
332 | if (!memcmp(myhwaddr, pattrib->src, ETH_ALEN)) | |
333 | return _FAIL; | |
334 | if ((memcmp(myhwaddr, pattrib->dst, ETH_ALEN)) && (!bmcast)) | |
335 | return _FAIL; | |
1e9ee6f7 WY |
336 | if (is_zero_ether_addr(pattrib->bssid) || |
337 | is_zero_ether_addr(mybssid) || | |
2865d42c LF |
338 | (memcmp(pattrib->bssid, mybssid, ETH_ALEN))) |
339 | return _FAIL; | |
340 | sta_addr = pattrib->src; | |
1ca96884 | 341 | } else if (check_fwstate(pmlmepriv, WIFI_STATION_STATE)) { |
2865d42c LF |
342 | /* For Station mode, sa and bssid should always be BSSID, |
343 | * and DA is my mac-address */ | |
344 | if (memcmp(pattrib->bssid, pattrib->src, ETH_ALEN)) | |
345 | return _FAIL; | |
346 | sta_addr = pattrib->bssid; | |
168a2c10 | 347 | } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) { |
2865d42c LF |
348 | if (bmcast) { |
349 | /* For AP mode, if DA == MCAST, then BSSID should | |
350 | * be also MCAST */ | |
351 | if (!IS_MCAST(pattrib->bssid)) | |
352 | return _FAIL; | |
353 | } else { /* not mc-frame */ | |
354 | /* For AP mode, if DA is non-MCAST, then it must be | |
355 | * BSSID, and bssid == BSSID */ | |
356 | if (memcmp(pattrib->bssid, pattrib->dst, ETH_ALEN)) | |
357 | return _FAIL; | |
358 | sta_addr = pattrib->src; | |
359 | } | |
168a2c10 | 360 | } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) { |
2865d42c LF |
361 | memcpy(pattrib->dst, GetAddr1Ptr(ptr), ETH_ALEN); |
362 | memcpy(pattrib->src, GetAddr2Ptr(ptr), ETH_ALEN); | |
363 | memcpy(pattrib->bssid, GetAddr3Ptr(ptr), ETH_ALEN); | |
364 | memcpy(pattrib->ra, pattrib->dst, ETH_ALEN); | |
365 | memcpy(pattrib->ta, pattrib->src, ETH_ALEN); | |
366 | sta_addr = mybssid; | |
168a2c10 | 367 | } else { |
2865d42c | 368 | ret = _FAIL; |
168a2c10 | 369 | } |
2865d42c LF |
370 | if (bmcast) |
371 | *psta = r8712_get_bcmc_stainfo(adapter); | |
372 | else | |
373 | *psta = r8712_get_stainfo(pstapriv, sta_addr); /* get ap_info */ | |
374 | if (*psta == NULL) { | |
1ca96884 | 375 | if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) |
2865d42c LF |
376 | adapter->mppriv.rx_pktloss++; |
377 | return _FAIL; | |
378 | } | |
379 | return ret; | |
380 | } | |
381 | ||
2657c30e JM |
382 | static sint ap2sta_data_frame(struct _adapter *adapter, |
383 | union recv_frame *precv_frame, | |
384 | struct sta_info **psta) | |
2865d42c LF |
385 | { |
386 | u8 *ptr = precv_frame->u.hdr.rx_data; | |
387 | struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib; | |
388 | struct sta_priv *pstapriv = &adapter->stapriv; | |
389 | struct mlme_priv *pmlmepriv = &adapter->mlmepriv; | |
390 | u8 *mybssid = get_bssid(pmlmepriv); | |
391 | u8 *myhwaddr = myid(&adapter->eeprompriv); | |
392 | sint bmcast = IS_MCAST(pattrib->dst); | |
393 | ||
1ca96884 LB |
394 | if (check_fwstate(pmlmepriv, WIFI_STATION_STATE) && |
395 | check_fwstate(pmlmepriv, _FW_LINKED)) { | |
2865d42c LF |
396 | /* if NULL-frame, drop packet */ |
397 | if ((GetFrameSubType(ptr)) == WIFI_DATA_NULL) | |
398 | return _FAIL; | |
399 | /* drop QoS-SubType Data, including QoS NULL, | |
400 | * excluding QoS-Data */ | |
401 | if ((GetFrameSubType(ptr) & WIFI_QOS_DATA_TYPE) == | |
402 | WIFI_QOS_DATA_TYPE) { | |
403 | if (GetFrameSubType(ptr) & (BIT(4) | BIT(5) | BIT(6))) | |
404 | return _FAIL; | |
405 | } | |
406 | ||
407 | /* filter packets that SA is myself or multicast or broadcast */ | |
408 | if (!memcmp(myhwaddr, pattrib->src, ETH_ALEN)) | |
409 | return _FAIL; | |
410 | ||
411 | /* da should be for me */ | |
412 | if ((memcmp(myhwaddr, pattrib->dst, ETH_ALEN)) && (!bmcast)) | |
413 | return _FAIL; | |
414 | /* check BSSID */ | |
1e9ee6f7 WY |
415 | if (is_zero_ether_addr(pattrib->bssid) || |
416 | is_zero_ether_addr(mybssid) || | |
2865d42c LF |
417 | (memcmp(pattrib->bssid, mybssid, ETH_ALEN))) |
418 | return _FAIL; | |
419 | if (bmcast) | |
420 | *psta = r8712_get_bcmc_stainfo(adapter); | |
421 | else | |
422 | *psta = r8712_get_stainfo(pstapriv, pattrib->bssid); | |
423 | if (*psta == NULL) | |
424 | return _FAIL; | |
1ca96884 LB |
425 | } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE) && |
426 | check_fwstate(pmlmepriv, _FW_LINKED)) { | |
2865d42c LF |
427 | memcpy(pattrib->dst, GetAddr1Ptr(ptr), ETH_ALEN); |
428 | memcpy(pattrib->src, GetAddr2Ptr(ptr), ETH_ALEN); | |
429 | memcpy(pattrib->bssid, GetAddr3Ptr(ptr), ETH_ALEN); | |
430 | memcpy(pattrib->ra, pattrib->dst, ETH_ALEN); | |
431 | memcpy(pattrib->ta, pattrib->src, ETH_ALEN); | |
432 | memcpy(pattrib->bssid, mybssid, ETH_ALEN); | |
433 | *psta = r8712_get_stainfo(pstapriv, pattrib->bssid); | |
434 | if (*psta == NULL) | |
435 | return _FAIL; | |
168a2c10 | 436 | } else { |
2865d42c | 437 | return _FAIL; |
168a2c10 | 438 | } |
2865d42c LF |
439 | return _SUCCESS; |
440 | } | |
441 | ||
2657c30e JM |
442 | static sint sta2ap_data_frame(struct _adapter *adapter, |
443 | union recv_frame *precv_frame, | |
444 | struct sta_info **psta) | |
2865d42c LF |
445 | { |
446 | struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib; | |
447 | struct sta_priv *pstapriv = &adapter->stapriv; | |
448 | struct mlme_priv *pmlmepriv = &adapter->mlmepriv; | |
449 | unsigned char *mybssid = get_bssid(pmlmepriv); | |
450 | ||
1ca96884 | 451 | if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) { |
2865d42c LF |
452 | /* For AP mode, if DA is non-MCAST, then it must be BSSID, |
453 | * and bssid == BSSID | |
454 | * For AP mode, RA=BSSID, TX=STA(SRC_ADDR), A3=DST_ADDR */ | |
455 | if (memcmp(pattrib->bssid, mybssid, ETH_ALEN)) | |
456 | return _FAIL; | |
457 | *psta = r8712_get_stainfo(pstapriv, pattrib->src); | |
458 | if (*psta == NULL) | |
459 | return _FAIL; | |
460 | } | |
461 | return _SUCCESS; | |
462 | } | |
463 | ||
16e53729 | 464 | static sint validate_recv_ctrl_frame(struct _adapter *adapter, |
2865d42c LF |
465 | union recv_frame *precv_frame) |
466 | { | |
467 | return _FAIL; | |
468 | } | |
469 | ||
16e53729 | 470 | static sint validate_recv_mgnt_frame(struct _adapter *adapter, |
2865d42c LF |
471 | union recv_frame *precv_frame) |
472 | { | |
473 | return _FAIL; | |
474 | } | |
475 | ||
476 | ||
16e53729 | 477 | static sint validate_recv_data_frame(struct _adapter *adapter, |
2865d42c LF |
478 | union recv_frame *precv_frame) |
479 | { | |
480 | int res; | |
481 | u8 bretry; | |
482 | u8 *psa, *pda, *pbssid; | |
483 | struct sta_info *psta = NULL; | |
484 | u8 *ptr = precv_frame->u.hdr.rx_data; | |
485 | struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib; | |
486 | struct security_priv *psecuritypriv = &adapter->securitypriv; | |
487 | ||
488 | bretry = GetRetry(ptr); | |
489 | pda = get_da(ptr); | |
490 | psa = get_sa(ptr); | |
491 | pbssid = get_hdr_bssid(ptr); | |
492 | if (pbssid == NULL) | |
493 | return _FAIL; | |
494 | memcpy(pattrib->dst, pda, ETH_ALEN); | |
495 | memcpy(pattrib->src, psa, ETH_ALEN); | |
496 | memcpy(pattrib->bssid, pbssid, ETH_ALEN); | |
497 | switch (pattrib->to_fr_ds) { | |
498 | case 0: | |
499 | memcpy(pattrib->ra, pda, ETH_ALEN); | |
500 | memcpy(pattrib->ta, psa, ETH_ALEN); | |
501 | res = sta2sta_data_frame(adapter, precv_frame, &psta); | |
502 | break; | |
503 | case 1: | |
504 | memcpy(pattrib->ra, pda, ETH_ALEN); | |
505 | memcpy(pattrib->ta, pbssid, ETH_ALEN); | |
506 | res = ap2sta_data_frame(adapter, precv_frame, &psta); | |
507 | break; | |
508 | case 2: | |
509 | memcpy(pattrib->ra, pbssid, ETH_ALEN); | |
510 | memcpy(pattrib->ta, psa, ETH_ALEN); | |
511 | res = sta2ap_data_frame(adapter, precv_frame, &psta); | |
512 | break; | |
513 | case 3: | |
514 | memcpy(pattrib->ra, GetAddr1Ptr(ptr), ETH_ALEN); | |
515 | memcpy(pattrib->ta, GetAddr2Ptr(ptr), ETH_ALEN); | |
516 | return _FAIL; | |
517 | default: | |
518 | return _FAIL; | |
519 | } | |
520 | if (res == _FAIL) | |
521 | return _FAIL; | |
522 | if (psta == NULL) | |
523 | return _FAIL; | |
da077689 | 524 | precv_frame->u.hdr.psta = psta; |
2865d42c LF |
525 | pattrib->amsdu = 0; |
526 | /* parsing QC field */ | |
527 | if (pattrib->qos == 1) { | |
528 | pattrib->priority = GetPriority((ptr + 24)); | |
529 | pattrib->ack_policy = GetAckpolicy((ptr + 24)); | |
530 | pattrib->amsdu = GetAMsdu((ptr + 24)); | |
531 | pattrib->hdrlen = pattrib->to_fr_ds == 3 ? 32 : 26; | |
532 | } else { | |
533 | pattrib->priority = 0; | |
534 | pattrib->hdrlen = (pattrib->to_fr_ds == 3) ? 30 : 24; | |
535 | } | |
536 | ||
537 | if (pattrib->order)/*HT-CTRL 11n*/ | |
538 | pattrib->hdrlen += 4; | |
539 | precv_frame->u.hdr.preorder_ctrl = | |
540 | &psta->recvreorder_ctrl[pattrib->priority]; | |
541 | ||
542 | /* decache, drop duplicate recv packets */ | |
543 | if (recv_decache(precv_frame, bretry, &psta->sta_recvpriv.rxcache) == | |
544 | _FAIL) | |
545 | return _FAIL; | |
546 | ||
547 | if (pattrib->privacy) { | |
548 | GET_ENCRY_ALGO(psecuritypriv, psta, pattrib->encrypt, | |
549 | IS_MCAST(pattrib->ra)); | |
550 | SET_ICE_IV_LEN(pattrib->iv_len, pattrib->icv_len, | |
551 | pattrib->encrypt); | |
552 | } else { | |
553 | pattrib->encrypt = 0; | |
554 | pattrib->iv_len = pattrib->icv_len = 0; | |
555 | } | |
556 | return _SUCCESS; | |
557 | } | |
558 | ||
559 | sint r8712_validate_recv_frame(struct _adapter *adapter, | |
560 | union recv_frame *precv_frame) | |
561 | { | |
562 | /*shall check frame subtype, to / from ds, da, bssid */ | |
563 | /*then call check if rx seq/frag. duplicated.*/ | |
564 | ||
565 | u8 type; | |
566 | u8 subtype; | |
567 | sint retval = _SUCCESS; | |
568 | struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib; | |
569 | ||
570 | u8 *ptr = precv_frame->u.hdr.rx_data; | |
571 | u8 ver = (unsigned char)(*ptr) & 0x3; | |
572 | ||
573 | /*add version chk*/ | |
574 | if (ver != 0) | |
575 | return _FAIL; | |
576 | type = GetFrameType(ptr); | |
577 | subtype = GetFrameSubType(ptr); /*bit(7)~bit(2)*/ | |
578 | pattrib->to_fr_ds = get_tofr_ds(ptr); | |
579 | pattrib->frag_num = GetFragNum(ptr); | |
580 | pattrib->seq_num = GetSequence(ptr); | |
581 | pattrib->pw_save = GetPwrMgt(ptr); | |
582 | pattrib->mfrag = GetMFrag(ptr); | |
583 | pattrib->mdata = GetMData(ptr); | |
584 | pattrib->privacy = GetPrivacy(ptr); | |
585 | pattrib->order = GetOrder(ptr); | |
586 | switch (type) { | |
587 | case WIFI_MGT_TYPE: /*mgnt*/ | |
588 | retval = validate_recv_mgnt_frame(adapter, precv_frame); | |
589 | break; | |
590 | case WIFI_CTRL_TYPE:/*ctrl*/ | |
591 | retval = validate_recv_ctrl_frame(adapter, precv_frame); | |
592 | break; | |
593 | case WIFI_DATA_TYPE: /*data*/ | |
594 | pattrib->qos = (subtype & BIT(7)) ? 1 : 0; | |
595 | retval = validate_recv_data_frame(adapter, precv_frame); | |
596 | break; | |
597 | default: | |
598 | return _FAIL; | |
599 | } | |
600 | return retval; | |
601 | } | |
602 | ||
603 | sint r8712_wlanhdr_to_ethhdr(union recv_frame *precvframe) | |
604 | { | |
605 | /*remove the wlanhdr and add the eth_hdr*/ | |
606 | sint rmv_len; | |
e29d3ebc | 607 | u16 len; |
2865d42c LF |
608 | u8 bsnaphdr; |
609 | u8 *psnap_type; | |
610 | struct ieee80211_snap_hdr *psnap; | |
2865d42c LF |
611 | struct _adapter *adapter = precvframe->u.hdr.adapter; |
612 | struct mlme_priv *pmlmepriv = &adapter->mlmepriv; | |
613 | ||
614 | u8 *ptr = get_recvframe_data(precvframe); /*point to frame_ctrl field*/ | |
615 | struct rx_pkt_attrib *pattrib = &precvframe->u.hdr.attrib; | |
616 | ||
617 | if (pattrib->encrypt) | |
618 | recvframe_pull_tail(precvframe, pattrib->icv_len); | |
619 | psnap = (struct ieee80211_snap_hdr *)(ptr + pattrib->hdrlen + | |
620 | pattrib->iv_len); | |
621 | psnap_type = ptr + pattrib->hdrlen + pattrib->iv_len + SNAP_SIZE; | |
622 | /* convert hdr + possible LLC headers into Ethernet header */ | |
623 | if ((!memcmp(psnap, (void *)rfc1042_header, SNAP_SIZE) && | |
624 | (memcmp(psnap_type, (void *)SNAP_ETH_TYPE_IPX, 2)) && | |
625 | (memcmp(psnap_type, (void *)SNAP_ETH_TYPE_APPLETALK_AARP, 2))) || | |
626 | !memcmp(psnap, (void *)bridge_tunnel_header, SNAP_SIZE)) { | |
627 | /* remove RFC1042 or Bridge-Tunnel encapsulation and | |
628 | * replace EtherType */ | |
629 | bsnaphdr = true; | |
630 | } else { | |
631 | /* Leave Ethernet header part of hdr and full payload */ | |
632 | bsnaphdr = false; | |
633 | } | |
634 | rmv_len = pattrib->hdrlen + pattrib->iv_len + | |
635 | (bsnaphdr ? SNAP_SIZE : 0); | |
636 | len = precvframe->u.hdr.len - rmv_len; | |
1ca96884 | 637 | if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) { |
2865d42c LF |
638 | ptr += rmv_len; |
639 | *ptr = 0x87; | |
4ef2de5a | 640 | *(ptr + 1) = 0x12; |
2865d42c LF |
641 | /* append rx status for mp test packets */ |
642 | ptr = recvframe_pull(precvframe, (rmv_len - | |
643 | sizeof(struct ethhdr) + 2) - 24); | |
272d60bf AB |
644 | if (!ptr) |
645 | return _FAIL; | |
2865d42c LF |
646 | memcpy(ptr, get_rxmem(precvframe), 24); |
647 | ptr += 24; | |
272d60bf | 648 | } else { |
2865d42c LF |
649 | ptr = recvframe_pull(precvframe, (rmv_len - |
650 | sizeof(struct ethhdr) + (bsnaphdr ? 2 : 0))); | |
272d60bf AB |
651 | if (!ptr) |
652 | return _FAIL; | |
653 | } | |
2865d42c LF |
654 | |
655 | memcpy(ptr, pattrib->dst, ETH_ALEN); | |
4ef2de5a | 656 | memcpy(ptr + ETH_ALEN, pattrib->src, ETH_ALEN); |
2865d42c LF |
657 | if (!bsnaphdr) { |
658 | len = htons(len); | |
659 | memcpy(ptr + 12, &len, 2); | |
660 | } | |
8ffca9ea | 661 | return _SUCCESS; |
2865d42c LF |
662 | } |
663 | ||
664 | s32 r8712_recv_entry(union recv_frame *precvframe) | |
665 | { | |
666 | struct _adapter *padapter; | |
667 | struct recv_priv *precvpriv; | |
2865d42c | 668 | |
2865d42c | 669 | s32 ret = _SUCCESS; |
2865d42c LF |
670 | |
671 | padapter = precvframe->u.hdr.adapter; | |
2865d42c | 672 | precvpriv = &(padapter->recvpriv); |
2865d42c LF |
673 | |
674 | padapter->ledpriv.LedControlHandler(padapter, LED_CTL_RX); | |
675 | ||
676 | ret = recv_func(padapter, precvframe); | |
677 | if (ret == _FAIL) | |
678 | goto _recv_entry_drop; | |
679 | precvpriv->rx_pkts++; | |
680 | precvpriv->rx_bytes += (uint)(precvframe->u.hdr.rx_tail - | |
681 | precvframe->u.hdr.rx_data); | |
682 | return ret; | |
683 | _recv_entry_drop: | |
684 | precvpriv->rx_drop++; | |
685 | padapter->mppriv.rx_pktloss = precvpriv->rx_drop; | |
686 | return ret; | |
687 | } |