drivers/staging/vt6656/dpc.c

   1 /*
   2  * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
   3  * All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * File: dpc.c
  20  *
  21  * Purpose: handle dpc rx functions
  22  *
  23  * Author: Lyndon Chen
  24  *
  25  * Date: May 20, 2003
  26  *
  27  * Functions:
  28  *      device_receive_frame - Rcv 802.11 frame function
  29  *      s_bHandleRxEncryption- Rcv decrypted data via on-fly
  30  *      s_byGetRateIdx- get rate index
  31  *      s_vGetDASA- get data offset
  32  *      s_vProcessRxMACHeader- Rcv 802.11 and translate to 802.3
  33  *
  34  * Revision History:
  35  *
  36  */
  37
  38 #include "dpc.h"
  39 #include "device.h"
  40 #include "rxtx.h"
  41 #include "tether.h"
  42 #include "card.h"
  43 #include "bssdb.h"
  44 #include "mac.h"
  45 #include "baseband.h"
  46 #include "michael.h"
  47 #include "tkip.h"
  48 #include "wctl.h"
  49 #include "rf.h"
  50 #include "iowpa.h"
  51 #include "datarate.h"
  52 #include "usbpipe.h"
  53
  54 //static int          msglevel                =MSG_LEVEL_DEBUG;
  55 static int          msglevel                =MSG_LEVEL_INFO;
  56
  57 static const u8 acbyRxRate[MAX_RATE] =
  58 {2, 4, 11, 22, 12, 18, 24, 36, 48, 72, 96, 108};
  59
  60 static u8 s_byGetRateIdx(u8 byRate);
  61
  62 static
  63 void
  64 s_vGetDASA(
  65       u8 * pbyRxBufferAddr,
  66      unsigned int *pcbHeaderSize,
  67      struct ethhdr *psEthHeader
  68     );
  69
  70 static void s_vProcessRxMACHeader(struct vnt_private *pDevice,
  71         u8 *pbyRxBufferAddr, u32 cbPacketSize, int bIsWEP, int bExtIV,
  72         u32 *pcbHeadSize);
  73
  74 static int s_bHandleRxEncryption(struct vnt_private *pDevice, u8 *pbyFrame,
  75         u32 FrameSize, u8 *pbyRsr, u8 *pbyNewRsr, PSKeyItem *pKeyOut,
  76         s32 *pbExtIV, u16 *pwRxTSC15_0, u32 *pdwRxTSC47_16);
  77
  78 /*+
  79  *
  80  * Description:
  81  *    Translate Rcv 802.11 header to 802.3 header with Rx buffer
  82  *
  83  * Parameters:
  84  *  In:
  85  *      pDevice
  86  *      dwRxBufferAddr  - Address of Rcv Buffer
  87  *      cbPacketSize    - Rcv Packet size
  88  *      bIsWEP          - If Rcv with WEP
  89  *  Out:
  90  *      pcbHeaderSize   - 802.11 header size
  91  *
  92  * Return Value: None
  93  *
  94 -*/
  95
  96 static void s_vProcessRxMACHeader(struct vnt_private *pDevice,
  97         u8 *pbyRxBufferAddr, u32 cbPacketSize, int bIsWEP, int bExtIV,
  98         u32 *pcbHeadSize)
  99 {
 100         u8 *pbyRxBuffer;
 101         u32 cbHeaderSize = 0;
 102         u16 *pwType;
 103         struct ieee80211_hdr *pMACHeader;
 104         int ii;
 105
 106     pMACHeader = (struct ieee80211_hdr *) (pbyRxBufferAddr + cbHeaderSize);
 107
 108     s_vGetDASA((u8 *)pMACHeader, &cbHeaderSize, &pDevice->sRxEthHeader);
 109
 110     if (bIsWEP) {
 111         if (bExtIV) {
 112             // strip IV&ExtIV , add 8 byte
 113             cbHeaderSize += (WLAN_HDR_ADDR3_LEN + 8);
 114         } else {
 115             // strip IV , add 4 byte
 116             cbHeaderSize += (WLAN_HDR_ADDR3_LEN + 4);
 117         }
 118     }
 119     else {
 120         cbHeaderSize += WLAN_HDR_ADDR3_LEN;
 121     };
 122
 123     pbyRxBuffer = (u8 *) (pbyRxBufferAddr + cbHeaderSize);
 124     if (ether_addr_equal(pbyRxBuffer, pDevice->abySNAP_Bridgetunnel)) {
 125         cbHeaderSize += 6;
 126     } else if (ether_addr_equal(pbyRxBuffer, pDevice->abySNAP_RFC1042)) {
 127         cbHeaderSize += 6;
 128         pwType = (u16 *) (pbyRxBufferAddr + cbHeaderSize);
 129         if ((*pwType == cpu_to_be16(ETH_P_IPX)) ||
 130             (*pwType == cpu_to_le16(0xF380))) {
 131                 cbHeaderSize -= 8;
 132             pwType = (u16 *) (pbyRxBufferAddr + cbHeaderSize);
 133             if (bIsWEP) {
 134                 if (bExtIV) {
 135                     *pwType = htons(cbPacketSize - WLAN_HDR_ADDR3_LEN - 8);    // 8 is IV&ExtIV
 136                 } else {
 137                     *pwType = htons(cbPacketSize - WLAN_HDR_ADDR3_LEN - 4);    // 4 is IV
 138                 }
 139             }
 140             else {
 141                 *pwType = htons(cbPacketSize - WLAN_HDR_ADDR3_LEN);
 142             }
 143         }
 144     }
 145     else {
 146         cbHeaderSize -= 2;
 147         pwType = (u16 *) (pbyRxBufferAddr + cbHeaderSize);
 148         if (bIsWEP) {
 149             if (bExtIV) {
 150                 *pwType = htons(cbPacketSize - WLAN_HDR_ADDR3_LEN - 8);    // 8 is IV&ExtIV
 151             } else {
 152                 *pwType = htons(cbPacketSize - WLAN_HDR_ADDR3_LEN - 4);    // 4 is IV
 153             }
 154         }
 155         else {
 156             *pwType = htons(cbPacketSize - WLAN_HDR_ADDR3_LEN);
 157         }
 158     }
 159
 160     cbHeaderSize -= (ETH_ALEN * 2);
 161     pbyRxBuffer = (u8 *) (pbyRxBufferAddr + cbHeaderSize);
 162     for (ii = 0; ii < ETH_ALEN; ii++)
 163         *pbyRxBuffer++ = pDevice->sRxEthHeader.h_dest[ii];
 164     for (ii = 0; ii < ETH_ALEN; ii++)
 165         *pbyRxBuffer++ = pDevice->sRxEthHeader.h_source[ii];
 166
 167     *pcbHeadSize = cbHeaderSize;
 168 }
 169
 170 static u8 s_byGetRateIdx(u8 byRate)
 171 {
 172     u8    byRateIdx;
 173
 174     for (byRateIdx = 0; byRateIdx <MAX_RATE ; byRateIdx++) {
 175         if (acbyRxRate[byRateIdx%MAX_RATE] == byRate)
 176             return byRateIdx;
 177     }
 178     return 0;
 179 }
 180
 181 static
 182 void
 183 s_vGetDASA (
 184       u8 * pbyRxBufferAddr,
 185      unsigned int *pcbHeaderSize,
 186      struct ethhdr *psEthHeader
 187     )
 188 {
 189         unsigned int            cbHeaderSize = 0;
 190         struct ieee80211_hdr *pMACHeader;
 191         int             ii;
 192
 193         pMACHeader = (struct ieee80211_hdr *) (pbyRxBufferAddr + cbHeaderSize);
 194
 195         if ((pMACHeader->frame_control & FC_TODS) == 0) {
 196                 if (pMACHeader->frame_control & FC_FROMDS) {
 197                         for (ii = 0; ii < ETH_ALEN; ii++) {
 198                                 psEthHeader->h_dest[ii] =
 199                                         pMACHeader->addr1[ii];
 200                                 psEthHeader->h_source[ii] =
 201                                         pMACHeader->addr3[ii];
 202                         }
 203                 } else {
 204                         /* IBSS mode */
 205                         for (ii = 0; ii < ETH_ALEN; ii++) {
 206                                 psEthHeader->h_dest[ii] =
 207                                         pMACHeader->addr1[ii];
 208                                 psEthHeader->h_source[ii] =
 209                                         pMACHeader->addr2[ii];
 210                         }
 211                 }
 212         } else {
 213                 /* Is AP mode.. */
 214                 if (pMACHeader->frame_control & FC_FROMDS) {
 215                         for (ii = 0; ii < ETH_ALEN; ii++) {
 216                                 psEthHeader->h_dest[ii] =
 217                                         pMACHeader->addr3[ii];
 218                                 psEthHeader->h_source[ii] =
 219                                         pMACHeader->addr4[ii];
 220                                 cbHeaderSize += 6;
 221                         }
 222                 } else {
 223                         for (ii = 0; ii < ETH_ALEN; ii++) {
 224                                 psEthHeader->h_dest[ii] =
 225                                         pMACHeader->addr3[ii];
 226                                 psEthHeader->h_source[ii] =
 227                                         pMACHeader->addr2[ii];
 228                         }
 229                 }
 230         };
 231     *pcbHeaderSize = cbHeaderSize;
 232 }
 233
 234 int RXbBulkInProcessData(struct vnt_private *pDevice, struct vnt_rcb *pRCB,
 235         unsigned long BytesToIndicate)
 236 {
 237         struct net_device_stats *pStats = &pDevice->stats;
 238         struct sk_buff *skb;
 239         struct vnt_manager *pMgmt = &pDevice->vnt_mgmt;
 240         struct vnt_rx_mgmt *pRxPacket = &pMgmt->sRxPacket;
 241         struct ieee80211_hdr *p802_11Header;
 242         u8 *pbyRsr, *pbyNewRsr, *pbyRSSI, *pbyFrame;
 243         u64 *pqwTSFTime;
 244         u32 bDeFragRx = false;
 245         u32 cbHeaderOffset, cbIVOffset;
 246         u32 FrameSize;
 247         u16 wEtherType = 0;
 248         s32 iSANodeIndex = -1;
 249         int ii;
 250         u8 *pbyRxSts, *pbyRxRate, *pbySQ, *pby3SQ;
 251         u32 cbHeaderSize;
 252         PSKeyItem pKey = NULL;
 253         u16 wRxTSC15_0 = 0;
 254         u32 dwRxTSC47_16 = 0;
 255         /* signed long ldBm = 0; */
 256         int bIsWEP = false; int bExtIV = false;
 257         u32 dwWbkStatus;
 258         struct vnt_rcb *pRCBIndicate = pRCB;
 259         u8 *pbyDAddress;
 260         u16 *pwPLCP_Length;
 261         u8 abyVaildRate[MAX_RATE]
 262                 = {2, 4, 11, 22, 12, 18, 24, 36, 48, 72, 96, 108};
 263         u16 wPLCPwithPadding;
 264         struct ieee80211_hdr *pMACHeader;
 265         int bRxeapol_key = false;
 266
 267     DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"---------- RXbBulkInProcessData---\n");
 268
 269     skb = pRCB->skb;
 270
 271         /* [31:16]RcvByteCount ( not include 4-byte Status ) */
 272         dwWbkStatus = *((u32 *)(skb->data));
 273         FrameSize = dwWbkStatus >> 16;
 274         FrameSize += 4;
 275
 276         if (BytesToIndicate != FrameSize) {
 277                 DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"------- WRONG Length 1\n");
 278                 pStats->rx_frame_errors++;
 279                 return false;
 280         }
 281
 282     if ((BytesToIndicate > 2372) || (BytesToIndicate <= 40)) {
 283         // Frame Size error drop this packet.
 284         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "---------- WRONG Length 2\n");
 285         pStats->rx_frame_errors++;
 286         return false;
 287     }
 288
 289     pbyDAddress = (u8 *)(skb->data);
 290     pbyRxSts = pbyDAddress+4;
 291     pbyRxRate = pbyDAddress+5;
 292
 293     //real Frame Size = USBFrameSize -4WbkStatus - 4RxStatus - 8TSF - 4RSR - 4SQ3 - ?Padding
 294     //if SQ3 the range is 24~27, if no SQ3 the range is 20~23
 295     //real Frame size in PLCPLength field.
 296     pwPLCP_Length = (u16 *) (pbyDAddress + 6);
 297     //Fix hardware bug => PLCP_Length error
 298     if ( ((BytesToIndicate - (*pwPLCP_Length)) > 27) ||
 299          ((BytesToIndicate - (*pwPLCP_Length)) < 24) ||
 300          (BytesToIndicate < (*pwPLCP_Length)) ) {
 301
 302         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"Wrong PLCP Length %x\n", (int) *pwPLCP_Length);
 303         pStats->rx_frame_errors++;
 304         return false;
 305     }
 306     for ( ii=RATE_1M;ii<MAX_RATE;ii++) {
 307         if ( *pbyRxRate == abyVaildRate[ii] ) {
 308             break;
 309         }
 310     }
 311     if ( ii==MAX_RATE ) {
 312         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"Wrong RxRate %x\n",(int) *pbyRxRate);
 313         return false;
 314     }
 315
 316     wPLCPwithPadding = ( (*pwPLCP_Length / 4) + ( (*pwPLCP_Length % 4) ? 1:0 ) ) *4;
 317
 318         pqwTSFTime = (u64 *)(pbyDAddress + 8 + wPLCPwithPadding);
 319   if(pDevice->byBBType == BB_TYPE_11G)  {
 320       pby3SQ = pbyDAddress + 8 + wPLCPwithPadding + 12;
 321       pbySQ = pby3SQ;
 322     }
 323   else {
 324    pbySQ = pbyDAddress + 8 + wPLCPwithPadding + 8;
 325    pby3SQ = pbySQ;
 326   }
 327     pbyNewRsr = pbyDAddress + 8 + wPLCPwithPadding + 9;
 328     pbyRSSI = pbyDAddress + 8 + wPLCPwithPadding + 10;
 329     pbyRsr = pbyDAddress + 8 + wPLCPwithPadding + 11;
 330
 331     FrameSize = *pwPLCP_Length;
 332
 333     pbyFrame = pbyDAddress + 8;
 334
 335     pMACHeader = (struct ieee80211_hdr *) pbyFrame;
 336
 337 //mike add: to judge if current AP is activated?
 338     if ((pMgmt->eCurrMode == WMAC_MODE_STANDBY) ||
 339         (pMgmt->eCurrMode == WMAC_MODE_ESS_STA)) {
 340        if (pMgmt->sNodeDBTable[0].bActive) {
 341          if (ether_addr_equal(pMgmt->abyCurrBSSID, pMACHeader->addr2)) {
 342             if (pMgmt->sNodeDBTable[0].uInActiveCount != 0)
 343                   pMgmt->sNodeDBTable[0].uInActiveCount = 0;
 344            }
 345        }
 346     }
 347
 348     if (!is_multicast_ether_addr(pMACHeader->addr1)) {
 349         if (WCTLbIsDuplicate(&(pDevice->sDupRxCache), (struct ieee80211_hdr *) pbyFrame)) {
 350             return false;
 351         }
 352
 353         if (!ether_addr_equal(pDevice->abyCurrentNetAddr, pMACHeader->addr1)) {
 354                 return false;
 355         }
 356     }
 357
 358     // Use for TKIP MIC
 359     s_vGetDASA(pbyFrame, &cbHeaderSize, &pDevice->sRxEthHeader);
 360
 361     if (ether_addr_equal((u8 *)pDevice->sRxEthHeader.h_source,
 362                          pDevice->abyCurrentNetAddr))
 363         return false;
 364
 365     if ((pMgmt->eCurrMode == WMAC_MODE_ESS_AP) || (pMgmt->eCurrMode == WMAC_MODE_IBSS_STA)) {
 366         if (IS_CTL_PSPOLL(pbyFrame) || !IS_TYPE_CONTROL(pbyFrame)) {
 367             p802_11Header = (struct ieee80211_hdr *) (pbyFrame);
 368             // get SA NodeIndex
 369             if (BSSbIsSTAInNodeDB(pDevice, (u8 *)(p802_11Header->addr2), &iSANodeIndex)) {
 370                 pMgmt->sNodeDBTable[iSANodeIndex].ulLastRxJiffer = jiffies;
 371                 pMgmt->sNodeDBTable[iSANodeIndex].uInActiveCount = 0;
 372             }
 373         }
 374     }
 375
 376     if (IS_FC_WEP(pbyFrame)) {
 377         bool     bRxDecryOK = false;
 378
 379         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"rx WEP pkt\n");
 380         bIsWEP = true;
 381
 382         bRxDecryOK = s_bHandleRxEncryption(pDevice, pbyFrame, FrameSize,
 383                 pbyRsr, pbyNewRsr, &pKey, &bExtIV, &wRxTSC15_0, &dwRxTSC47_16);
 384
 385         if (bRxDecryOK) {
 386             if ((*pbyNewRsr & NEWRSR_DECRYPTOK) == 0) {
 387                 DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"ICV Fail\n");
 388                 if ( (pMgmt->eAuthenMode == WMAC_AUTH_WPA) ||
 389                     (pMgmt->eAuthenMode == WMAC_AUTH_WPAPSK) ||
 390                     (pMgmt->eAuthenMode == WMAC_AUTH_WPANONE) ||
 391                     (pMgmt->eAuthenMode == WMAC_AUTH_WPA2) ||
 392                     (pMgmt->eAuthenMode == WMAC_AUTH_WPA2PSK)) {
 393                 }
 394                 return false;
 395             }
 396         } else {
 397             DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"WEP Func Fail\n");
 398             return false;
 399         }
 400         if ((pKey != NULL) && (pKey->byCipherSuite == KEY_CTL_CCMP))
 401             FrameSize -= 8;         // Message Integrity Code
 402         else
 403             FrameSize -= 4;         // 4 is ICV
 404     }
 405
 406     //
 407     // RX OK
 408     //
 409     /* remove the FCS/CRC length */
 410     FrameSize -= ETH_FCS_LEN;
 411
 412     if ( !(*pbyRsr & (RSR_ADDRBROAD | RSR_ADDRMULTI)) && // unicast address
 413         (IS_FRAGMENT_PKT((pbyFrame)))
 414         ) {
 415         // defragment
 416         bDeFragRx = WCTLbHandleFragment(pDevice, (struct ieee80211_hdr *) (pbyFrame), FrameSize, bIsWEP, bExtIV);
 417         if (bDeFragRx) {
 418             // defrag complete
 419             // TODO skb, pbyFrame
 420             skb = pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].skb;
 421             FrameSize = pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].cbFrameLength;
 422             pbyFrame = skb->data + 8;
 423         }
 424         else {
 425             return false;
 426         }
 427     }
 428
 429     //
 430     // Management & Control frame Handle
 431     //
 432     if ((IS_TYPE_DATA((pbyFrame))) == false) {
 433         // Handle Control & Manage Frame
 434
 435         if (IS_TYPE_MGMT((pbyFrame))) {
 436             u8 * pbyData1;
 437             u8 * pbyData2;
 438
 439             pRxPacket = &(pRCB->sMngPacket);
 440             pRxPacket->p80211Header = (PUWLAN_80211HDR)(pbyFrame);
 441             pRxPacket->cbMPDULen = FrameSize;
 442             pRxPacket->uRSSI = *pbyRSSI;
 443             pRxPacket->bySQ = *pbySQ;
 444                 pRxPacket->qwLocalTSF = cpu_to_le64(*pqwTSFTime);
 445             if (bIsWEP) {
 446                 // strip IV
 447                 pbyData1 = WLAN_HDR_A3_DATA_PTR(pbyFrame);
 448                 pbyData2 = WLAN_HDR_A3_DATA_PTR(pbyFrame) + 4;
 449                 for (ii = 0; ii < (FrameSize - 4); ii++) {
 450                     *pbyData1 = *pbyData2;
 451                      pbyData1++;
 452                      pbyData2++;
 453                 }
 454             }
 455
 456             pRxPacket->byRxRate = s_byGetRateIdx(*pbyRxRate);
 457
 458             if ( *pbyRxSts == 0 ) {
 459                 //Discard beacon packet which channel is 0
 460                 if ( (WLAN_GET_FC_FSTYPE((pRxPacket->p80211Header->sA3.wFrameCtl)) == WLAN_FSTYPE_BEACON) ||
 461                      (WLAN_GET_FC_FSTYPE((pRxPacket->p80211Header->sA3.wFrameCtl)) == WLAN_FSTYPE_PROBERESP) ) {
 462                         return false;
 463                 }
 464             }
 465             pRxPacket->byRxChannel = (*pbyRxSts) >> 2;
 466
 467             //
 468             // Insert the RCB in the Recv Mng list
 469             //
 470             EnqueueRCB(pDevice->FirstRecvMngList, pDevice->LastRecvMngList, pRCBIndicate);
 471             pDevice->NumRecvMngList++;
 472             if ( bDeFragRx == false) {
 473                 pRCB->Ref++;
 474             }
 475             if (pDevice->bIsRxMngWorkItemQueued == false) {
 476                 pDevice->bIsRxMngWorkItemQueued = true;
 477                 schedule_work(&pDevice->rx_mng_work_item);
 478             }
 479
 480         }
 481         else {
 482             // Control Frame
 483         };
 484         return false;
 485     }
 486     else {
 487         if (pMgmt->eCurrMode == WMAC_MODE_ESS_AP) {
 488             //In AP mode, hw only check addr1(BSSID or RA) if equal to local MAC.
 489             if ( !(*pbyRsr & RSR_BSSIDOK)) {
 490                 if (bDeFragRx) {
 491                     if (!device_alloc_frag_buf(pDevice, &pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx])) {
 492                         DBG_PRT(MSG_LEVEL_ERR,KERN_ERR "%s: can not alloc more frag bufs\n",
 493                         pDevice->dev->name);
 494                     }
 495                 }
 496                 return false;
 497             }
 498         }
 499         else {
 500             // discard DATA packet while not associate || BSSID error
 501             if ((pDevice->bLinkPass == false) ||
 502                 !(*pbyRsr & RSR_BSSIDOK)) {
 503                 if (bDeFragRx) {
 504                     if (!device_alloc_frag_buf(pDevice, &pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx])) {
 505                         DBG_PRT(MSG_LEVEL_ERR,KERN_ERR "%s: can not alloc more frag bufs\n",
 506                         pDevice->dev->name);
 507                     }
 508                 }
 509                 return false;
 510             }
 511    //mike add:station mode check eapol-key challenge--->
 512           {
 513             u8  Protocol_Version;    //802.1x Authentication
 514             u8  Packet_Type;           //802.1x Authentication
 515             u8  Descriptor_type;
 516              u16 Key_info;
 517               if (bIsWEP)
 518                   cbIVOffset = 8;
 519               else
 520                   cbIVOffset = 0;
 521               wEtherType = (skb->data[cbIVOffset + 8 + 24 + 6] << 8) |
 522                           skb->data[cbIVOffset + 8 + 24 + 6 + 1];
 523               Protocol_Version = skb->data[cbIVOffset + 8 + 24 + 6 + 1 +1];
 524               Packet_Type = skb->data[cbIVOffset + 8 + 24 + 6 + 1 +1+1];
 525              if (wEtherType == ETH_P_PAE) {         //Protocol Type in LLC-Header
 526                   if(((Protocol_Version==1) ||(Protocol_Version==2)) &&
 527                      (Packet_Type==3)) {  //802.1x OR eapol-key challenge frame receive
 528                         bRxeapol_key = true;
 529                       Descriptor_type = skb->data[cbIVOffset + 8 + 24 + 6 + 1 +1+1+1+2];
 530                       Key_info = (skb->data[cbIVOffset + 8 + 24 + 6 + 1 +1+1+1+2+1]<<8) |skb->data[cbIVOffset + 8 + 24 + 6 + 1 +1+1+1+2+2] ;
 531                       if(Descriptor_type==2) {    //RSN
 532                          //  printk("WPA2_Rx_eapol-key_info<-----:%x\n",Key_info);
 533                       }
 534                      else  if(Descriptor_type==254) {
 535                         //  printk("WPA_Rx_eapol-key_info<-----:%x\n",Key_info);
 536                      }
 537                   }
 538               }
 539           }
 540     //mike add:station mode check eapol-key challenge<---
 541         }
 542     }
 543
 544 // Data frame Handle
 545
 546     if (pDevice->bEnablePSMode) {
 547         if (IS_FC_MOREDATA((pbyFrame))) {
 548             if (*pbyRsr & RSR_ADDROK) {
 549                 //PSbSendPSPOLL((PSDevice)pDevice);
 550             }
 551         }
 552         else {
 553             if (pMgmt->bInTIMWake == true) {
 554                 pMgmt->bInTIMWake = false;
 555             }
 556         }
 557     }
 558
 559     // ++++++++ For BaseBand Algorithm +++++++++++++++
 560     pDevice->uCurrRSSI = *pbyRSSI;
 561     pDevice->byCurrSQ = *pbySQ;
 562
 563     // todo
 564 /*
 565     if ((*pbyRSSI != 0) &&
 566         (pMgmt->pCurrBSS!=NULL)) {
 567         RFvRSSITodBm(pDevice, *pbyRSSI, &ldBm);
 568         // Monitor if RSSI is too strong.
 569         pMgmt->pCurrBSS->byRSSIStatCnt++;
 570         pMgmt->pCurrBSS->byRSSIStatCnt %= RSSI_STAT_COUNT;
 571         pMgmt->pCurrBSS->ldBmAverage[pMgmt->pCurrBSS->byRSSIStatCnt] = ldBm;
 572         for (ii = 0; ii < RSSI_STAT_COUNT; ii++) {
 573                 if (pMgmt->pCurrBSS->ldBmAverage[ii] != 0) {
 574                         pMgmt->pCurrBSS->ldBmMAX =
 575                                 max(pMgmt->pCurrBSS->ldBmAverage[ii], ldBm);
 576                 }
 577         }
 578     }
 579 */
 580
 581     if ((pKey != NULL) && (pKey->byCipherSuite == KEY_CTL_TKIP)) {
 582         if (bIsWEP) {
 583             FrameSize -= 8;  //MIC
 584         }
 585     }
 586
 587     //--------------------------------------------------------------------------------
 588     // Soft MIC
 589     if ((pKey != NULL) && (pKey->byCipherSuite == KEY_CTL_TKIP)) {
 590         if (bIsWEP) {
 591             u32 *          pdwMIC_L;
 592             u32 *          pdwMIC_R;
 593             u32           dwMIC_Priority;
 594             u32           dwMICKey0 = 0, dwMICKey1 = 0;
 595             u32           dwLocalMIC_L = 0;
 596             u32           dwLocalMIC_R = 0;
 597
 598             if (pMgmt->eCurrMode == WMAC_MODE_ESS_AP) {
 599                 dwMICKey0 = cpu_to_le32(*(u32 *)(&pKey->abyKey[24]));
 600                 dwMICKey1 = cpu_to_le32(*(u32 *)(&pKey->abyKey[28]));
 601             }
 602             else {
 603                 if (pMgmt->eAuthenMode == WMAC_AUTH_WPANONE) {
 604                     dwMICKey0 = cpu_to_le32(*(u32 *)(&pKey->abyKey[16]));
 605                     dwMICKey1 = cpu_to_le32(*(u32 *)(&pKey->abyKey[20]));
 606                 } else if ((pKey->dwKeyIndex & BIT28) == 0) {
 607                     dwMICKey0 = cpu_to_le32(*(u32 *)(&pKey->abyKey[16]));
 608                     dwMICKey1 = cpu_to_le32(*(u32 *)(&pKey->abyKey[20]));
 609                 } else {
 610                     dwMICKey0 = cpu_to_le32(*(u32 *)(&pKey->abyKey[24]));
 611                     dwMICKey1 = cpu_to_le32(*(u32 *)(&pKey->abyKey[28]));
 612                 }
 613             }
 614
 615             MIC_vInit(dwMICKey0, dwMICKey1);
 616             MIC_vAppend((u8 *)&(pDevice->sRxEthHeader.h_dest[0]), 12);
 617             dwMIC_Priority = 0;
 618             MIC_vAppend((u8 *)&dwMIC_Priority, 4);
 619             // 4 is Rcv buffer header, 24 is MAC Header, and 8 is IV and Ext IV.
 620             MIC_vAppend((u8 *)(skb->data + 8 + WLAN_HDR_ADDR3_LEN + 8),
 621                         FrameSize - WLAN_HDR_ADDR3_LEN - 8);
 622             MIC_vGetMIC(&dwLocalMIC_L, &dwLocalMIC_R);
 623             MIC_vUnInit();
 624
 625             pdwMIC_L = (u32 *)(skb->data + 8 + FrameSize);
 626             pdwMIC_R = (u32 *)(skb->data + 8 + FrameSize + 4);
 627
 628             if ((cpu_to_le32(*pdwMIC_L) != dwLocalMIC_L) || (cpu_to_le32(*pdwMIC_R) != dwLocalMIC_R) ||
 629                 (pDevice->bRxMICFail == true)) {
 630                 DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"MIC comparison is fail!\n");
 631                 pDevice->bRxMICFail = false;
 632                 if (bDeFragRx) {
 633                     if (!device_alloc_frag_buf(pDevice, &pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx])) {
 634                         DBG_PRT(MSG_LEVEL_ERR,KERN_ERR "%s: can not alloc more frag bufs\n",
 635                             pDevice->dev->name);
 636                     }
 637                 }
 638                                 //send event to wpa_supplicant
 639                                 //if(pDevice->bWPASuppWextEnabled == true)
 640                                 {
 641                                         union iwreq_data wrqu;
 642                                         struct iw_michaelmicfailure ev;
 643                                         int keyidx = pbyFrame[cbHeaderSize+3] >> 6; //top two-bits
 644                                         memset(&ev, 0, sizeof(ev));
 645                                         ev.flags = keyidx & IW_MICFAILURE_KEY_ID;
 646                                         if ((pMgmt->eCurrMode == WMAC_MODE_ESS_STA) &&
 647                                                         (pMgmt->eCurrState == WMAC_STATE_ASSOC) &&
 648                                                                 (*pbyRsr & (RSR_ADDRBROAD | RSR_ADDRMULTI)) == 0) {
 649                                                 ev.flags |= IW_MICFAILURE_PAIRWISE;
 650                                         } else {
 651                                                 ev.flags |= IW_MICFAILURE_GROUP;
 652                                         }
 653
 654                                         ev.src_addr.sa_family = ARPHRD_ETHER;
 655                                         memcpy(ev.src_addr.sa_data, pMACHeader->addr2, ETH_ALEN);
 656                                         memset(&wrqu, 0, sizeof(wrqu));
 657                                         wrqu.data.length = sizeof(ev);
 658                         PRINT_K("wireless_send_event--->IWEVMICHAELMICFAILURE\n");
 659                                         wireless_send_event(pDevice->dev, IWEVMICHAELMICFAILURE, &wrqu, (char *)&ev);
 660
 661                                 }
 662
 663                 return false;
 664
 665             }
 666         }
 667     } //---end of SOFT MIC-----------------------------------------------------------------------
 668
 669     // ++++++++++ Reply Counter Check +++++++++++++
 670
 671     if ((pKey != NULL) && ((pKey->byCipherSuite == KEY_CTL_TKIP) ||
 672                            (pKey->byCipherSuite == KEY_CTL_CCMP))) {
 673         if (bIsWEP) {
 674             u16        wLocalTSC15_0 = 0;
 675             u32       dwLocalTSC47_16 = 0;
 676             unsigned long long       RSC = 0;
 677             // endian issues
 678             RSC = *((unsigned long long *) &(pKey->KeyRSC));
 679             wLocalTSC15_0 = (u16) RSC;
 680             dwLocalTSC47_16 = (u32) (RSC>>16);
 681
 682             RSC = dwRxTSC47_16;
 683             RSC <<= 16;
 684             RSC += wRxTSC15_0;
 685                 memcpy(&(pKey->KeyRSC), &RSC,  sizeof(u64));
 686
 687                 if (pDevice->vnt_mgmt.eCurrMode == WMAC_MODE_ESS_STA &&
 688                         pDevice->vnt_mgmt.eCurrState == WMAC_STATE_ASSOC) {
 689                         /* check RSC */
 690                 if ( (wRxTSC15_0 < wLocalTSC15_0) &&
 691                      (dwRxTSC47_16 <= dwLocalTSC47_16) &&
 692                      !((dwRxTSC47_16 == 0) && (dwLocalTSC47_16 == 0xFFFFFFFF))) {
 693                     DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"TSC is illegal~~!\n ");
 694
 695                     if (bDeFragRx) {
 696                         if (!device_alloc_frag_buf(pDevice, &pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx])) {
 697                             DBG_PRT(MSG_LEVEL_ERR,KERN_ERR "%s: can not alloc more frag bufs\n",
 698                                 pDevice->dev->name);
 699                         }
 700                     }
 701                     return false;
 702                 }
 703             }
 704         }
 705     } // ----- End of Reply Counter Check --------------------------
 706
 707     s_vProcessRxMACHeader(pDevice, (u8 *)(skb->data+8), FrameSize, bIsWEP, bExtIV, &cbHeaderOffset);
 708     FrameSize -= cbHeaderOffset;
 709     cbHeaderOffset += 8;        // 8 is Rcv buffer header
 710
 711     // Null data, framesize = 12
 712     if (FrameSize < 12)
 713         return false;
 714
 715         skb->data += cbHeaderOffset;
 716         skb->tail += cbHeaderOffset;
 717     skb_put(skb, FrameSize);
 718     skb->protocol=eth_type_trans(skb, skb->dev);
 719     skb->ip_summed=CHECKSUM_NONE;
 720     pStats->rx_bytes +=skb->len;
 721     pStats->rx_packets++;
 722     netif_rx(skb);
 723     if (bDeFragRx) {
 724         if (!device_alloc_frag_buf(pDevice, &pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx])) {
 725             DBG_PRT(MSG_LEVEL_ERR,KERN_ERR "%s: can not alloc more frag bufs\n",
 726                 pDevice->dev->name);
 727         }
 728         return false;
 729     }
 730
 731     return true;
 732 }
 733
 734 static int s_bHandleRxEncryption(struct vnt_private *pDevice, u8 *pbyFrame,
 735         u32 FrameSize, u8 *pbyRsr, u8 *pbyNewRsr, PSKeyItem *pKeyOut,
 736         s32 *pbExtIV, u16 *pwRxTSC15_0, u32 *pdwRxTSC47_16)
 737 {
 738         struct vnt_manager *pMgmt = &pDevice->vnt_mgmt;
 739         u32 PayloadLen = FrameSize;
 740         u8 *pbyIV;
 741         u8 byKeyIdx;
 742         PSKeyItem pKey = NULL;
 743         u8 byDecMode = KEY_CTL_WEP;
 744
 745     *pwRxTSC15_0 = 0;
 746     *pdwRxTSC47_16 = 0;
 747
 748     pbyIV = pbyFrame + WLAN_HDR_ADDR3_LEN;
 749     if ( WLAN_GET_FC_TODS(*(u16 *)pbyFrame) &&
 750          WLAN_GET_FC_FROMDS(*(u16 *)pbyFrame) ) {
 751          pbyIV += 6;             // 6 is 802.11 address4
 752          PayloadLen -= 6;
 753     }
 754     byKeyIdx = (*(pbyIV+3) & 0xc0);
 755     byKeyIdx >>= 6;
 756     DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"\nKeyIdx: %d\n", byKeyIdx);
 757
 758     if ((pMgmt->eAuthenMode == WMAC_AUTH_WPA) ||
 759         (pMgmt->eAuthenMode == WMAC_AUTH_WPAPSK) ||
 760         (pMgmt->eAuthenMode == WMAC_AUTH_WPANONE) ||
 761         (pMgmt->eAuthenMode == WMAC_AUTH_WPA2) ||
 762         (pMgmt->eAuthenMode == WMAC_AUTH_WPA2PSK)) {
 763         if (((*pbyRsr & (RSR_ADDRBROAD | RSR_ADDRMULTI)) == 0) &&
 764             (pMgmt->byCSSPK != KEY_CTL_NONE)) {
 765             // unicast pkt use pairwise key
 766             DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"unicast pkt\n");
 767             if (KeybGetKey(&(pDevice->sKey), pDevice->abyBSSID, 0xFFFFFFFF, &pKey) == true) {
 768                 if (pMgmt->byCSSPK == KEY_CTL_TKIP)
 769                     byDecMode = KEY_CTL_TKIP;
 770                 else if (pMgmt->byCSSPK == KEY_CTL_CCMP)
 771                     byDecMode = KEY_CTL_CCMP;
 772             }
 773             DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"unicast pkt: %d, %p\n", byDecMode, pKey);
 774         } else {
 775             // use group key
 776             KeybGetKey(&(pDevice->sKey), pDevice->abyBSSID, byKeyIdx, &pKey);
 777             if (pMgmt->byCSSGK == KEY_CTL_TKIP)
 778                 byDecMode = KEY_CTL_TKIP;
 779             else if (pMgmt->byCSSGK == KEY_CTL_CCMP)
 780                 byDecMode = KEY_CTL_CCMP;
 781             DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"group pkt: %d, %d, %p\n", byKeyIdx, byDecMode, pKey);
 782         }
 783     }
 784     // our WEP only support Default Key
 785     if (pKey == NULL) {
 786         // use default group key
 787         KeybGetKey(&(pDevice->sKey), pDevice->abyBroadcastAddr, byKeyIdx, &pKey);
 788         if (pMgmt->byCSSGK == KEY_CTL_TKIP)
 789             byDecMode = KEY_CTL_TKIP;
 790         else if (pMgmt->byCSSGK == KEY_CTL_CCMP)
 791             byDecMode = KEY_CTL_CCMP;
 792     }
 793     *pKeyOut = pKey;
 794
 795     DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"AES:%d %d %d\n", pMgmt->byCSSPK, pMgmt->byCSSGK, byDecMode);
 796
 797     if (pKey == NULL) {
 798         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"pKey == NULL\n");
 799         return false;
 800     }
 801     if (byDecMode != pKey->byCipherSuite) {
 802         *pKeyOut = NULL;
 803         return false;
 804     }
 805     if (byDecMode == KEY_CTL_WEP) {
 806         // handle WEP
 807         if ((pDevice->byLocalID <= REV_ID_VT3253_A1) ||
 808                 (((PSKeyTable)(pKey->pvKeyTable))->bSoftWEP == true)) {
 809             // Software WEP
 810             // 1. 3253A
 811             // 2. WEP 256
 812
 813             PayloadLen -= (WLAN_HDR_ADDR3_LEN + 4 + 4); // 24 is 802.11 header,4 is IV, 4 is crc
 814             memcpy(pDevice->abyPRNG, pbyIV, 3);
 815             memcpy(pDevice->abyPRNG + 3, pKey->abyKey, pKey->uKeyLength);
 816             rc4_init(&pDevice->SBox, pDevice->abyPRNG, pKey->uKeyLength + 3);
 817             rc4_encrypt(&pDevice->SBox, pbyIV+4, pbyIV+4, PayloadLen);
 818
 819             if (ETHbIsBufferCrc32Ok(pbyIV+4, PayloadLen)) {
 820                 *pbyNewRsr |= NEWRSR_DECRYPTOK;
 821             }
 822         }
 823     } else if ((byDecMode == KEY_CTL_TKIP) ||
 824                (byDecMode == KEY_CTL_CCMP)) {
 825         // TKIP/AES
 826
 827         PayloadLen -= (WLAN_HDR_ADDR3_LEN + 8 + 4); // 24 is 802.11 header, 8 is IV&ExtIV, 4 is crc
 828         *pdwRxTSC47_16 = cpu_to_le32(*(u32 *)(pbyIV + 4));
 829         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"ExtIV: %x\n", *pdwRxTSC47_16);
 830         if (byDecMode == KEY_CTL_TKIP) {
 831             *pwRxTSC15_0 = cpu_to_le16(MAKEWORD(*(pbyIV+2), *pbyIV));
 832         } else {
 833             *pwRxTSC15_0 = cpu_to_le16(*(u16 *)pbyIV);
 834         }
 835         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"TSC0_15: %x\n", *pwRxTSC15_0);
 836
 837         if ((byDecMode == KEY_CTL_TKIP) &&
 838             (pDevice->byLocalID <= REV_ID_VT3253_A1)) {
 839             // Software TKIP
 840             // 1. 3253 A
 841             struct ieee80211_hdr *pMACHeader = (struct ieee80211_hdr *) (pbyFrame);
 842             TKIPvMixKey(pKey->abyKey, pMACHeader->addr2, *pwRxTSC15_0, *pdwRxTSC47_16, pDevice->abyPRNG);
 843             rc4_init(&pDevice->SBox, pDevice->abyPRNG, TKIP_KEY_LEN);
 844             rc4_encrypt(&pDevice->SBox, pbyIV+8, pbyIV+8, PayloadLen);
 845             if (ETHbIsBufferCrc32Ok(pbyIV+8, PayloadLen)) {
 846                 *pbyNewRsr |= NEWRSR_DECRYPTOK;
 847                 DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"ICV OK!\n");
 848             } else {
 849                 DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"ICV FAIL!!!\n");
 850                 DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"PayloadLen = %d\n", PayloadLen);
 851             }
 852         }
 853     }// end of TKIP/AES
 854
 855     if ((*(pbyIV+3) & 0x20) != 0)
 856         *pbExtIV = true;
 857     return true;
 858 }
 859
 860 void RXvWorkItem(struct work_struct *work)
 861 {
 862         struct vnt_private *priv =
 863                 container_of(work, struct vnt_private, read_work_item);
 864         int status;
 865         struct vnt_rcb *rcb = NULL;
 866         unsigned long flags;
 867
 868         if (priv->Flags & fMP_DISCONNECTED)
 869                 return;
 870
 871         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"---->Rx Polling Thread\n");
 872
 873         spin_lock_irqsave(&priv->lock, flags);
 874
 875         while ((priv->Flags & fMP_POST_READS) && MP_IS_READY(priv) &&
 876                         (priv->NumRecvFreeList != 0)) {
 877                 rcb = priv->FirstRecvFreeList;
 878
 879                 priv->NumRecvFreeList--;
 880
 881                 DequeueRCB(priv->FirstRecvFreeList, priv->LastRecvFreeList);
 882
 883                 status = PIPEnsBulkInUsbRead(priv, rcb);
 884         }
 885
 886         priv->bIsRxWorkItemQueued = false;
 887
 888         spin_unlock_irqrestore(&priv->lock, flags);
 889 }
 890
 891 void RXvFreeRCB(struct vnt_rcb *rcb, int re_alloc_skb)
 892 {
 893         struct vnt_private *priv = rcb->pDevice;
 894
 895         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"---->RXvFreeRCB\n");
 896
 897         if (re_alloc_skb == false) {
 898                 kfree_skb(rcb->skb);
 899                 re_alloc_skb = true;
 900         }
 901
 902         if (re_alloc_skb == true) {
 903                 rcb->skb = netdev_alloc_skb(priv->dev, priv->rx_buf_sz);
 904                 /* TODO error handling */
 905                 if (!rcb->skb) {
 906                         DBG_PRT(MSG_LEVEL_ERR, KERN_ERR
 907                                 " Failed to re-alloc rx skb\n");
 908                 }
 909         }
 910
 911         /* Insert the RCB back in the Recv free list */
 912         EnqueueRCB(priv->FirstRecvFreeList, priv->LastRecvFreeList, rcb);
 913         priv->NumRecvFreeList++;
 914
 915         if ((priv->Flags & fMP_POST_READS) && MP_IS_READY(priv) &&
 916                         (priv->bIsRxWorkItemQueued == false)) {
 917                 priv->bIsRxWorkItemQueued = true;
 918                 schedule_work(&priv->read_work_item);
 919         }
 920
 921         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"<----RXFreeRCB %d %d\n",
 922                         priv->NumRecvFreeList, priv->NumRecvMngList);
 923 }
 924
 925 void RXvMngWorkItem(struct work_struct *work)
 926 {
 927         struct vnt_private *pDevice =
 928                 container_of(work, struct vnt_private, rx_mng_work_item);
 929         struct vnt_rcb *pRCB = NULL;
 930         struct vnt_rx_mgmt *pRxPacket;
 931         int bReAllocSkb = false;
 932         unsigned long flags;
 933
 934         if (pDevice->Flags & fMP_DISCONNECTED)
 935                 return;
 936
 937     DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"---->Rx Mng Thread\n");
 938
 939     while (pDevice->NumRecvMngList!=0)
 940     {
 941         spin_lock_irqsave(&pDevice->lock, flags);
 942
 943         pRCB = pDevice->FirstRecvMngList;
 944         pDevice->NumRecvMngList--;
 945         DequeueRCB(pDevice->FirstRecvMngList, pDevice->LastRecvMngList);
 946
 947         spin_unlock_irqrestore(&pDevice->lock, flags);
 948
 949         if(!pRCB){
 950             break;
 951         }
 952         pRxPacket = &(pRCB->sMngPacket);
 953         vMgrRxManagePacket(pDevice, &pDevice->vnt_mgmt, pRxPacket);
 954         pRCB->Ref--;
 955         if (pRCB->Ref == 0) {
 956                 DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"RxvFreeMng %d %d\n",
 957                         pDevice->NumRecvFreeList, pDevice->NumRecvMngList);
 958
 959                 spin_lock_irqsave(&pDevice->lock, flags);
 960
 961                 RXvFreeRCB(pRCB, bReAllocSkb);
 962
 963                 spin_unlock_irqrestore(&pDevice->lock, flags);
 964         } else {
 965             DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"Rx Mng Only we have the right to free RCB\n");
 966         }
 967     }
 968
 969         pDevice->bIsRxMngWorkItemQueued = false;
 970 }
 971