diff options
Diffstat (limited to 'drivers/staging/vt6655/wctl.c')
| -rw-r--r-- | drivers/staging/vt6655/wctl.c | 241 |
1 files changed, 111 insertions, 130 deletions
diff --git a/drivers/staging/vt6655/wctl.c b/drivers/staging/vt6655/wctl.c index c096583a772..fddea9fc9cf 100644 --- a/drivers/staging/vt6655/wctl.c +++ b/drivers/staging/vt6655/wctl.c @@ -43,13 +43,11 @@ /*--------------------- Static Classes ----------------------------*/ /*--------------------- Static Variables --------------------------*/ -// static int msglevel =MSG_LEVEL_INFO; + /*--------------------- Static Functions --------------------------*/ /*--------------------- Export Variables --------------------------*/ - - /* * Description: * Scan Rx cache. Return true if packet is duplicate, else @@ -66,32 +64,31 @@ * */ -bool WCTLbIsDuplicate (PSCache pCache, PS802_11Header pMACHeader) +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) && - (!compare_ether_addr(&(pCacheEntry->abyAddr2[0]), &(pMACHeader->abyAddr2[0]))) - ) { - /* 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; + 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; } /* @@ -108,22 +105,20 @@ bool WCTLbIsDuplicate (PSCache pCache, PS802_11Header pMACHeader) * Return Value: index number in Defragment Database * */ -unsigned int WCTLuSearchDFCB (PSDevice pDevice, PS802_11Header pMACHeader) +unsigned int WCTLuSearchDFCB(PSDevice pDevice, PS802_11Header pMACHeader) { -unsigned int ii; - - for(ii=0;ii<pDevice->cbDFCB;ii++) { - if ((pDevice->sRxDFCB[ii].bInUse == true) && - (!compare_ether_addr(&(pDevice->sRxDFCB[ii].abyAddr2[0]), &(pMACHeader->abyAddr2[0]))) - ) { - // - return(ii); - } - } - return(pDevice->cbDFCB); + 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 @@ -138,27 +133,26 @@ unsigned int ii; * Return Value: index number in Defragment Database * */ -unsigned int WCTLuInsertDFCB (PSDevice pDevice, PS802_11Header pMACHeader) +unsigned int WCTLuInsertDFCB(PSDevice 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 == false) { - 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); + 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 @@ -175,76 +169,63 @@ unsigned int ii; * Return Value: true if it is valid fragment packet and we have resource to defragment; otherwise false * */ -bool WCTLbHandleFragment (PSDevice pDevice, PS802_11Header pMACHeader, unsigned int cbFrameLength, bool bWEP, bool bExtIV) +bool WCTLbHandleFragment(PSDevice pDevice, PS802_11Header 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->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++; - //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->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++; - //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); - } + 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; + } } - - |