diff options
Diffstat (limited to 'drivers/staging/vt6655/wctl.c')
| -rw-r--r-- | drivers/staging/vt6655/wctl.c | 233 |
1 files changed, 0 insertions, 233 deletions
diff --git a/drivers/staging/vt6655/wctl.c b/drivers/staging/vt6655/wctl.c deleted file mode 100644 index 5a54d98d985a..000000000000 --- a/drivers/staging/vt6655/wctl.c +++ /dev/null @@ -1,233 +0,0 @@ -/* - * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc. - * All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - * - * File: wctl.c - * - * Purpose: handle WMAC duplicate filter & defragment - * - * Author: Jerry Chen - * - * Date: Jun. 27, 2002 - * - * Functions: - * WCTLbIsDuplicate - Test if duplicate packet - * WCTLuSearchDFCB - Search DeFragment Control Database - * WCTLuInsertDFCB - Insert DeFragment Control Database - * WCTLbHandleFragment - Handle received fragment packet - * - * Revision History: - * - */ - -#include "wctl.h" -#include "device.h" -#include "card.h" - -/*--------------------- Static Definitions -------------------------*/ - -/*--------------------- Static Classes ----------------------------*/ - -/*--------------------- Static Variables --------------------------*/ - -/*--------------------- Static Functions --------------------------*/ - -/*--------------------- Export Variables --------------------------*/ - -/* - * Description: - * Scan Rx cache. Return true if packet is duplicate, else - * inserts in receive cache and returns false. - * - * Parameters: - * In: - * pCache - Receive packets history - * pMACHeader - 802.11 MAC Header of received packet - * Out: - * none - * - * Return Value: true if packet duplicate; otherwise false - * - */ - -bool WCTLbIsDuplicate(PSCache pCache, PS802_11Header pMACHeader) -{ - unsigned int uIndex; - unsigned int ii; - PSCacheEntry pCacheEntry; - - if (IS_FC_RETRY(pMACHeader)) { - uIndex = pCache->uInPtr; - for (ii = 0; ii < DUPLICATE_RX_CACHE_LENGTH; ii++) { - pCacheEntry = &(pCache->asCacheEntry[uIndex]); - if ((pCacheEntry->wFmSequence == pMACHeader->wSeqCtl) && - ether_addr_equal(pCacheEntry->abyAddr2, - pMACHeader->abyAddr2)) { - /* Duplicate match */ - return true; - } - ADD_ONE_WITH_WRAP_AROUND(uIndex, DUPLICATE_RX_CACHE_LENGTH); - } - } - /* Not fount in cache - insert */ - pCacheEntry = &pCache->asCacheEntry[pCache->uInPtr]; - pCacheEntry->wFmSequence = pMACHeader->wSeqCtl; - memcpy(&(pCacheEntry->abyAddr2[0]), &(pMACHeader->abyAddr2[0]), ETH_ALEN); - ADD_ONE_WITH_WRAP_AROUND(pCache->uInPtr, DUPLICATE_RX_CACHE_LENGTH); - return false; -} - -/* - * Description: - * Found if sequence number of received fragment packet in Defragment Database - * - * Parameters: - * In: - * pDevice - Pointer to adapter - * pMACHeader - 802.11 MAC Header of received packet - * Out: - * none - * - * Return Value: index number in Defragment Database - * - */ -unsigned int WCTLuSearchDFCB(struct vnt_private *pDevice, - PS802_11Header pMACHeader) -{ - unsigned int ii; - - for (ii = 0; ii < pDevice->cbDFCB; ii++) { - if (pDevice->sRxDFCB[ii].bInUse && - ether_addr_equal(pDevice->sRxDFCB[ii].abyAddr2, - pMACHeader->abyAddr2)) { - return ii; - } - } - return pDevice->cbDFCB; -} - -/* - * Description: - * Insert received fragment packet in Defragment Database - * - * Parameters: - * In: - * pDevice - Pointer to adapter - * pMACHeader - 802.11 MAC Header of received packet - * Out: - * none - * - * Return Value: index number in Defragment Database - * - */ -unsigned int WCTLuInsertDFCB(struct vnt_private *pDevice, PS802_11Header pMACHeader) -{ - unsigned int ii; - - if (pDevice->cbFreeDFCB == 0) - return pDevice->cbDFCB; - for (ii = 0; ii < pDevice->cbDFCB; ii++) { - if (!pDevice->sRxDFCB[ii].bInUse) { - pDevice->cbFreeDFCB--; - pDevice->sRxDFCB[ii].uLifetime = pDevice->dwMaxReceiveLifetime; - pDevice->sRxDFCB[ii].bInUse = true; - pDevice->sRxDFCB[ii].wSequence = (pMACHeader->wSeqCtl >> 4); - pDevice->sRxDFCB[ii].wFragNum = (pMACHeader->wSeqCtl & 0x000F); - memcpy(&(pDevice->sRxDFCB[ii].abyAddr2[0]), &(pMACHeader->abyAddr2[0]), ETH_ALEN); - return ii; - } - } - return pDevice->cbDFCB; -} - -/* - * Description: - * Handle received fragment packet - * - * Parameters: - * In: - * pDevice - Pointer to adapter - * pMACHeader - 802.11 MAC Header of received packet - * cbFrameLength - Frame length - * bWEP - is WEP packet - * Out: - * none - * - * Return Value: true if it is valid fragment packet and we have resource to defragment; otherwise false - * - */ -bool WCTLbHandleFragment(struct vnt_private *pDevice, PS802_11Header pMACHeader, - unsigned int cbFrameLength, bool bWEP, bool bExtIV) -{ - unsigned int uHeaderSize; - - if (bWEP) { - uHeaderSize = 28; - if (bExtIV) - // ExtIV - uHeaderSize += 4; - } else { - uHeaderSize = 24; - } - - if (IS_FIRST_FRAGMENT_PKT(pMACHeader)) { - pDevice->uCurrentDFCBIdx = WCTLuSearchDFCB(pDevice, pMACHeader); - if (pDevice->uCurrentDFCBIdx < pDevice->cbDFCB) { - // duplicate, we must flush previous DCB - pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].uLifetime = pDevice->dwMaxReceiveLifetime; - pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].wSequence = (pMACHeader->wSeqCtl >> 4); - pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].wFragNum = (pMACHeader->wSeqCtl & 0x000F); - } else { - pDevice->uCurrentDFCBIdx = WCTLuInsertDFCB(pDevice, pMACHeader); - if (pDevice->uCurrentDFCBIdx == pDevice->cbDFCB) - return false; - } - // reserve 4 byte to match MAC RX Buffer - pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].pbyRxBuffer = (unsigned char *)(pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].skb->data + 4); - memcpy(pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].pbyRxBuffer, pMACHeader, cbFrameLength); - pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].cbFrameLength = cbFrameLength; - pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].pbyRxBuffer += cbFrameLength; - pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].wFragNum++; - return false; - } else { - pDevice->uCurrentDFCBIdx = WCTLuSearchDFCB(pDevice, pMACHeader); - if (pDevice->uCurrentDFCBIdx != pDevice->cbDFCB) { - if ((pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].wSequence == (pMACHeader->wSeqCtl >> 4)) && - (pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].wFragNum == (pMACHeader->wSeqCtl & 0x000F)) && - ((pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].cbFrameLength + cbFrameLength - uHeaderSize) < 2346)) { - memcpy(pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].pbyRxBuffer, ((unsigned char *)(pMACHeader) + uHeaderSize), (cbFrameLength - uHeaderSize)); - pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].cbFrameLength += (cbFrameLength - uHeaderSize); - pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].pbyRxBuffer += (cbFrameLength - uHeaderSize); - pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].wFragNum++; - } else { - // seq error or frag # error flush DFCB - pDevice->cbFreeDFCB++; - pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].bInUse = false; - return false; - } - } else { - return false; - } - if (IS_LAST_FRAGMENT_PKT(pMACHeader)) { - //enq defragcontrolblock - pDevice->cbFreeDFCB++; - pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].bInUse = false; - return true; - } - return false; - } -} |