diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/staging/vt6656/wctl.c | 244 |
1 files changed, 0 insertions, 244 deletions
diff --git a/drivers/staging/vt6656/wctl.c b/drivers/staging/vt6656/wctl.c deleted file mode 100644 index efdc5d5d38ee..000000000000 --- a/drivers/staging/vt6656/wctl.c +++ /dev/null @@ -1,244 +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" -#include "tmacro.h" - -// static int msglevel =MSG_LEVEL_INFO; - -/* - * 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, struct ieee80211_hdr *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->seq_ctrl) && - ether_addr_equal(pCacheEntry->abyAddr2, pMACHeader->addr2) && - (pCacheEntry->wFrameCtl == pMACHeader->frame_control) - ) { - /* Duplicate match */ - return true; - } - ADD_ONE_WITH_WRAP_AROUND(uIndex, DUPLICATE_RX_CACHE_LENGTH); - } - } - /* Not found in cache - insert */ - pCacheEntry = &pCache->asCacheEntry[pCache->uInPtr]; - pCacheEntry->wFmSequence = pMACHeader->seq_ctrl; - memcpy(&(pCacheEntry->abyAddr2[0]), &(pMACHeader->addr2[0]), ETH_ALEN); - pCacheEntry->wFrameCtl = pMACHeader->frame_control; - 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, - struct ieee80211_hdr *pMACHeader) -{ - unsigned int ii; - - for (ii = 0; ii < pDevice->cbDFCB; ii++) { - if ((pDevice->sRxDFCB[ii].bInUse == true) && - ether_addr_equal(pDevice->sRxDFCB[ii].abyAddr2, - pMACHeader->addr2)) { - 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, - struct ieee80211_hdr *pMACHeader) -{ - unsigned int ii; - - if (pDevice->cbFreeDFCB == 0) - return(pDevice->cbDFCB); - for (ii = 0; ii < pDevice->cbDFCB; ii++) { - if (pDevice->sRxDFCB[ii].bInUse == false) { - pDevice->cbFreeDFCB--; - pDevice->sRxDFCB[ii].uLifetime = pDevice->dwMaxReceiveLifetime; - pDevice->sRxDFCB[ii].bInUse = true; - pDevice->sRxDFCB[ii].wSequence = (pMACHeader->seq_ctrl >> 4); - pDevice->sRxDFCB[ii].wFragNum = (pMACHeader->seq_ctrl & 0x000F); - memcpy(&(pDevice->sRxDFCB[ii].abyAddr2[0]), - &(pMACHeader->addr2[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, struct ieee80211_hdr *pMACHeader, unsigned int cbFrameLength, bool bWEP, bool bExtIV) -{ - unsigned int uHeaderSize; - - if (bWEP == true) { - 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->seq_ctrl >> 4); - pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].wFragNum = (pMACHeader->seq_ctrl & 0x000F); - } - else { - pDevice->uCurrentDFCBIdx = WCTLuInsertDFCB(pDevice, pMACHeader); - if (pDevice->uCurrentDFCBIdx == pDevice->cbDFCB) { - return(false); - } - } - // reserve 8 byte to match MAC RX Buffer - pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].pbyRxBuffer = (u8 *) (pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].skb->data + 8); -// pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].pbyRxBuffer = (u8 *) (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++; - //DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "First pDevice->uCurrentDFCBIdx= %d\n", pDevice->uCurrentDFCBIdx); - return(false); - } - else { - pDevice->uCurrentDFCBIdx = WCTLuSearchDFCB(pDevice, pMACHeader); - if (pDevice->uCurrentDFCBIdx != pDevice->cbDFCB) { - if ((pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].wSequence == (pMACHeader->seq_ctrl >> 4)) && - (pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].wFragNum == (pMACHeader->seq_ctrl & 0x000F)) && - ((pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].cbFrameLength + cbFrameLength - uHeaderSize) < 2346)) { - - memcpy(pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].pbyRxBuffer, ((u8 *) (pMACHeader) + uHeaderSize), (cbFrameLength - uHeaderSize)); - pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].cbFrameLength += (cbFrameLength - uHeaderSize); - pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].pbyRxBuffer += (cbFrameLength - uHeaderSize); - pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].wFragNum++; - //DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "Second pDevice->uCurrentDFCBIdx= %d\n", pDevice->uCurrentDFCBIdx); - } - 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; - //DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO "Last pDevice->uCurrentDFCBIdx= %d\n", pDevice->uCurrentDFCBIdx); - return(true); - } - return(false); - } -} - |