| 1 | /****************************************************************************** |
| 2 | * rtl871x_recv.c |
| 3 | * |
| 4 | * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved. |
| 5 | * Linux device driver for RTL8192SU |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify it |
| 8 | * under the terms of version 2 of the GNU General Public License as |
| 9 | * published by the Free Software Foundation. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 14 | * more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License along with |
| 17 | * this program; if not, write to the Free Software Foundation, Inc., |
| 18 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA |
| 19 | * |
| 20 | * Modifications for inclusion into the Linux staging tree are |
| 21 | * Copyright(c) 2010 Larry Finger. All rights reserved. |
| 22 | * |
| 23 | * Contact information: |
| 24 | * WLAN FAE <wlanfae@realtek.com> |
| 25 | * Larry Finger <Larry.Finger@lwfinger.net> |
| 26 | * |
| 27 | ******************************************************************************/ |
| 28 | |
| 29 | #define _RTL871X_RECV_C_ |
| 30 | |
| 31 | #include <linux/ip.h> |
| 32 | #include <linux/slab.h> |
| 33 | #include <linux/if_ether.h> |
| 34 | #include <linux/kmemleak.h> |
| 35 | #include <linux/etherdevice.h> |
| 36 | |
| 37 | #include "osdep_service.h" |
| 38 | #include "drv_types.h" |
| 39 | #include "recv_osdep.h" |
| 40 | #include "mlme_osdep.h" |
| 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; |
| 75 | precvpriv->pallocated_frame_buf = kmalloc(NR_RECVFRAME * |
| 76 | sizeof(union recv_frame) + RXFRAME_ALIGN_SZ, |
| 77 | GFP_ATOMIC); |
| 78 | if (precvpriv->pallocated_frame_buf == NULL) |
| 79 | return _FAIL; |
| 80 | kmemleak_not_leak(precvpriv->pallocated_frame_buf); |
| 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) & |
| 86 | (RXFRAME_ALIGN_SZ - 1)); |
| 87 | precvframe = (union recv_frame *)precvpriv->precv_frame_buf; |
| 88 | for (i = 0; i < NR_RECVFRAME; i++) { |
| 89 | INIT_LIST_HEAD(&(precvframe->u.list)); |
| 90 | list_add_tail(&(precvframe->u.list), |
| 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; |
| 97 | return r8712_init_recv_priv(precvpriv, padapter); |
| 98 | } |
| 99 | |
| 100 | void _r8712_free_recv_priv(struct recv_priv *precvpriv) |
| 101 | { |
| 102 | kfree(precvpriv->pallocated_frame_buf); |
| 103 | r8712_free_recv_priv(precvpriv); |
| 104 | } |
| 105 | |
| 106 | union recv_frame *r8712_alloc_recvframe(struct __queue *pfree_recv_queue) |
| 107 | { |
| 108 | unsigned long irqL; |
| 109 | union recv_frame *precvframe; |
| 110 | struct list_head *plist, *phead; |
| 111 | struct _adapter *padapter; |
| 112 | struct recv_priv *precvpriv; |
| 113 | |
| 114 | spin_lock_irqsave(&pfree_recv_queue->lock, irqL); |
| 115 | if (list_empty(&pfree_recv_queue->queue)) { |
| 116 | precvframe = NULL; |
| 117 | } else { |
| 118 | phead = &pfree_recv_queue->queue; |
| 119 | plist = phead->next; |
| 120 | precvframe = LIST_CONTAINOR(plist, union recv_frame, u); |
| 121 | list_del_init(&precvframe->u.hdr.list); |
| 122 | padapter = precvframe->u.hdr.adapter; |
| 123 | if (padapter != NULL) { |
| 124 | precvpriv = &padapter->recvpriv; |
| 125 | if (pfree_recv_queue == &precvpriv->free_recv_queue) |
| 126 | precvpriv->free_recvframe_cnt--; |
| 127 | } |
| 128 | } |
| 129 | spin_unlock_irqrestore(&pfree_recv_queue->lock, irqL); |
| 130 | return precvframe; |
| 131 | } |
| 132 | |
| 133 | /* |
| 134 | caller : defrag; recvframe_chk_defrag in recv_thread (passive) |
| 135 | pframequeue: defrag_queue : will be accessed in recv_thread (passive) |
| 136 | |
| 137 | using spin_lock to protect |
| 138 | |
| 139 | */ |
| 140 | |
| 141 | void r8712_free_recvframe_queue(struct __queue *pframequeue, |
| 142 | struct __queue *pfree_recv_queue) |
| 143 | { |
| 144 | union recv_frame *precvframe; |
| 145 | struct list_head *plist, *phead; |
| 146 | |
| 147 | spin_lock(&pframequeue->lock); |
| 148 | phead = &pframequeue->queue; |
| 149 | plist = phead->next; |
| 150 | while (!end_of_queue_search(phead, plist)) { |
| 151 | precvframe = LIST_CONTAINOR(plist, union recv_frame, u); |
| 152 | plist = plist->next; |
| 153 | r8712_free_recvframe(precvframe, pfree_recv_queue); |
| 154 | } |
| 155 | spin_unlock(&pframequeue->lock); |
| 156 | } |
| 157 | |
| 158 | sint r8712_recvframe_chkmic(struct _adapter *adapter, |
| 159 | union recv_frame *precvframe) |
| 160 | { |
| 161 | sint i, res = _SUCCESS; |
| 162 | u32 datalen; |
| 163 | u8 miccode[8]; |
| 164 | u8 bmic_err = false; |
| 165 | u8 *pframe, *payload, *pframemic; |
| 166 | u8 *mickey, idx, *iv; |
| 167 | struct sta_info *stainfo; |
| 168 | struct rx_pkt_attrib *prxattrib = &precvframe->u.hdr.attrib; |
| 169 | struct security_priv *psecuritypriv = &adapter->securitypriv; |
| 170 | |
| 171 | stainfo = r8712_get_stainfo(&adapter->stapriv, &prxattrib->ta[0]); |
| 172 | if (prxattrib->encrypt == _TKIP_) { |
| 173 | /* calculate mic code */ |
| 174 | if (stainfo != NULL) { |
| 175 | if (IS_MCAST(prxattrib->ra)) { |
| 176 | iv = precvframe->u.hdr.rx_data + |
| 177 | prxattrib->hdrlen; |
| 178 | idx = iv[3]; |
| 179 | mickey = &psecuritypriv->XGrprxmickey[(((idx >> |
| 180 | 6) & 0x3)) - 1].skey[0]; |
| 181 | if (!psecuritypriv->binstallGrpkey) |
| 182 | return _FAIL; |
| 183 | } else { |
| 184 | mickey = &stainfo->tkiprxmickey.skey[0]; |
| 185 | } |
| 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 | } |
| 201 | if (bmic_err) { |
| 202 | if (prxattrib->bdecrypted) |
| 203 | r8712_handle_tkip_mic_err(adapter, |
| 204 | (u8)IS_MCAST(prxattrib->ra)); |
| 205 | res = _FAIL; |
| 206 | } else { |
| 207 | /* mic checked ok */ |
| 208 | if (!psecuritypriv->bcheck_grpkey && |
| 209 | IS_MCAST(prxattrib->ra)) |
| 210 | psecuritypriv->bcheck_grpkey = true; |
| 211 | } |
| 212 | recvframe_pull_tail(precvframe, 8); |
| 213 | } |
| 214 | } |
| 215 | return res; |
| 216 | } |
| 217 | |
| 218 | /* decrypt and set the ivlen,icvlen of the recv_frame */ |
| 219 | union recv_frame *r8712_decryptor(struct _adapter *padapter, |
| 220 | union recv_frame *precv_frame) |
| 221 | { |
| 222 | struct rx_pkt_attrib *prxattrib = &precv_frame->u.hdr.attrib; |
| 223 | struct security_priv *psecuritypriv = &padapter->securitypriv; |
| 224 | union recv_frame *return_packet = precv_frame; |
| 225 | |
| 226 | if ((prxattrib->encrypt > 0) && ((prxattrib->bdecrypted == 0) || |
| 227 | psecuritypriv->sw_decrypt)) { |
| 228 | psecuritypriv->hw_decrypted = false; |
| 229 | switch (prxattrib->encrypt) { |
| 230 | case _WEP40_: |
| 231 | case _WEP104_: |
| 232 | r8712_wep_decrypt(padapter, (u8 *)precv_frame); |
| 233 | break; |
| 234 | case _TKIP_: |
| 235 | r8712_tkip_decrypt(padapter, (u8 *)precv_frame); |
| 236 | break; |
| 237 | case _AES_: |
| 238 | r8712_aes_decrypt(padapter, (u8 *)precv_frame); |
| 239 | break; |
| 240 | default: |
| 241 | break; |
| 242 | } |
| 243 | } else if (prxattrib->bdecrypted == 1) { |
| 244 | psecuritypriv->hw_decrypted = true; |
| 245 | } |
| 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; |
| 258 | u16 ether_type; |
| 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) { |
| 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 | |
| 272 | if ((psta != NULL) && (psta->ieee8021x_blocked)) { |
| 273 | /* blocked |
| 274 | * only accept EAPOL frame */ |
| 275 | if (ether_type == 0x888e) { |
| 276 | prtnframe = precv_frame; |
| 277 | } else { |
| 278 | /*free this frame*/ |
| 279 | r8712_free_recvframe(precv_frame, |
| 280 | &adapter->recvpriv.free_recv_queue); |
| 281 | prtnframe = NULL; |
| 282 | } |
| 283 | } else { |
| 284 | /* allowed |
| 285 | * check decryption status, and decrypt the |
| 286 | * frame if needed */ |
| 287 | prtnframe = precv_frame; |
| 288 | /* check is the EAPOL frame or not (Rekey) */ |
| 289 | if (ether_type == 0x888e) { |
| 290 | /* check Rekey */ |
| 291 | prtnframe = precv_frame; |
| 292 | } |
| 293 | } |
| 294 | } else { |
| 295 | prtnframe = precv_frame; |
| 296 | } |
| 297 | return prtnframe; |
| 298 | } |
| 299 | |
| 300 | static sint recv_decache(union recv_frame *precv_frame, u8 bretry, |
| 301 | struct stainfo_rxcache *prxcache) |
| 302 | { |
| 303 | sint tid = precv_frame->u.hdr.attrib.priority; |
| 304 | u16 seq_ctrl = ((precv_frame->u.hdr.attrib.seq_num & 0xffff) << 4) | |
| 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 | |
| 315 | static sint sta2sta_data_frame(struct _adapter *adapter, |
| 316 | union recv_frame *precv_frame, |
| 317 | struct sta_info **psta) |
| 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 | |
| 329 | if (check_fwstate(pmlmepriv, WIFI_ADHOC_STATE) || |
| 330 | check_fwstate(pmlmepriv, WIFI_ADHOC_MASTER_STATE)) { |
| 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; |
| 336 | if (is_zero_ether_addr(pattrib->bssid) || |
| 337 | is_zero_ether_addr(mybssid) || |
| 338 | (memcmp(pattrib->bssid, mybssid, ETH_ALEN))) |
| 339 | return _FAIL; |
| 340 | sta_addr = pattrib->src; |
| 341 | } else if (check_fwstate(pmlmepriv, WIFI_STATION_STATE)) { |
| 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; |
| 347 | } else if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) { |
| 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 | } |
| 360 | } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) { |
| 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; |
| 367 | } else { |
| 368 | ret = _FAIL; |
| 369 | } |
| 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) { |
| 375 | if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) |
| 376 | adapter->mppriv.rx_pktloss++; |
| 377 | return _FAIL; |
| 378 | } |
| 379 | return ret; |
| 380 | } |
| 381 | |
| 382 | static sint ap2sta_data_frame(struct _adapter *adapter, |
| 383 | union recv_frame *precv_frame, |
| 384 | struct sta_info **psta) |
| 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 | |
| 394 | if (check_fwstate(pmlmepriv, WIFI_STATION_STATE) && |
| 395 | check_fwstate(pmlmepriv, _FW_LINKED)) { |
| 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 */ |
| 415 | if (is_zero_ether_addr(pattrib->bssid) || |
| 416 | is_zero_ether_addr(mybssid) || |
| 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; |
| 425 | } else if (check_fwstate(pmlmepriv, WIFI_MP_STATE) && |
| 426 | check_fwstate(pmlmepriv, _FW_LINKED)) { |
| 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; |
| 436 | } else { |
| 437 | return _FAIL; |
| 438 | } |
| 439 | return _SUCCESS; |
| 440 | } |
| 441 | |
| 442 | static sint sta2ap_data_frame(struct _adapter *adapter, |
| 443 | union recv_frame *precv_frame, |
| 444 | struct sta_info **psta) |
| 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 | |
| 451 | if (check_fwstate(pmlmepriv, WIFI_AP_STATE)) { |
| 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 | |
| 464 | static sint validate_recv_ctrl_frame(struct _adapter *adapter, |
| 465 | union recv_frame *precv_frame) |
| 466 | { |
| 467 | return _FAIL; |
| 468 | } |
| 469 | |
| 470 | static sint validate_recv_mgnt_frame(struct _adapter *adapter, |
| 471 | union recv_frame *precv_frame) |
| 472 | { |
| 473 | return _FAIL; |
| 474 | } |
| 475 | |
| 476 | |
| 477 | static sint validate_recv_data_frame(struct _adapter *adapter, |
| 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; |
| 524 | precv_frame->u.hdr.psta = psta; |
| 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; |
| 607 | u16 len; |
| 608 | u8 bsnaphdr; |
| 609 | u8 *psnap_type; |
| 610 | struct ieee80211_snap_hdr *psnap; |
| 611 | struct _adapter *adapter = precvframe->u.hdr.adapter; |
| 612 | struct mlme_priv *pmlmepriv = &adapter->mlmepriv; |
| 613 | |
| 614 | u8 *ptr = get_recvframe_data(precvframe); /*point to frame_ctrl field*/ |
| 615 | struct rx_pkt_attrib *pattrib = &precvframe->u.hdr.attrib; |
| 616 | |
| 617 | if (pattrib->encrypt) |
| 618 | recvframe_pull_tail(precvframe, pattrib->icv_len); |
| 619 | psnap = (struct ieee80211_snap_hdr *)(ptr + pattrib->hdrlen + |
| 620 | pattrib->iv_len); |
| 621 | psnap_type = ptr + pattrib->hdrlen + pattrib->iv_len + SNAP_SIZE; |
| 622 | /* convert hdr + possible LLC headers into Ethernet header */ |
| 623 | if ((!memcmp(psnap, (void *)rfc1042_header, SNAP_SIZE) && |
| 624 | (memcmp(psnap_type, (void *)SNAP_ETH_TYPE_IPX, 2)) && |
| 625 | (memcmp(psnap_type, (void *)SNAP_ETH_TYPE_APPLETALK_AARP, 2))) || |
| 626 | !memcmp(psnap, (void *)bridge_tunnel_header, SNAP_SIZE)) { |
| 627 | /* remove RFC1042 or Bridge-Tunnel encapsulation and |
| 628 | * replace EtherType */ |
| 629 | bsnaphdr = true; |
| 630 | } else { |
| 631 | /* Leave Ethernet header part of hdr and full payload */ |
| 632 | bsnaphdr = false; |
| 633 | } |
| 634 | rmv_len = pattrib->hdrlen + pattrib->iv_len + |
| 635 | (bsnaphdr ? SNAP_SIZE : 0); |
| 636 | len = precvframe->u.hdr.len - rmv_len; |
| 637 | if (check_fwstate(pmlmepriv, WIFI_MP_STATE)) { |
| 638 | ptr += rmv_len; |
| 639 | *ptr = 0x87; |
| 640 | *(ptr + 1) = 0x12; |
| 641 | /* append rx status for mp test packets */ |
| 642 | ptr = recvframe_pull(precvframe, (rmv_len - |
| 643 | sizeof(struct ethhdr) + 2) - 24); |
| 644 | if (!ptr) |
| 645 | return _FAIL; |
| 646 | memcpy(ptr, get_rxmem(precvframe), 24); |
| 647 | ptr += 24; |
| 648 | } else { |
| 649 | ptr = recvframe_pull(precvframe, (rmv_len - |
| 650 | sizeof(struct ethhdr) + (bsnaphdr ? 2 : 0))); |
| 651 | if (!ptr) |
| 652 | return _FAIL; |
| 653 | } |
| 654 | |
| 655 | memcpy(ptr, pattrib->dst, ETH_ALEN); |
| 656 | memcpy(ptr + ETH_ALEN, pattrib->src, ETH_ALEN); |
| 657 | if (!bsnaphdr) { |
| 658 | len = htons(len); |
| 659 | memcpy(ptr + 12, &len, 2); |
| 660 | } |
| 661 | return _SUCCESS; |
| 662 | } |
| 663 | |
| 664 | s32 r8712_recv_entry(union recv_frame *precvframe) |
| 665 | { |
| 666 | struct _adapter *padapter; |
| 667 | struct recv_priv *precvpriv; |
| 668 | |
| 669 | s32 ret = _SUCCESS; |
| 670 | |
| 671 | padapter = precvframe->u.hdr.adapter; |
| 672 | precvpriv = &(padapter->recvpriv); |
| 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 | } |