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ConstructTCPHeader() |
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| Protected Function |
Declared in: TCPSocket.h |
Declaration
virtual LPTCPHeader ConstructTCPHeader(
unsigned short usSourcePort,
unsigned short usDestinationPort,
unsigned char ucHeaderLength) const;
DescriptionCreate the TCP header
Function Body
try
{
//Construct the header
LPTCPHeader lpHead=new _TCPHeader;
//Set source and destination port
lpHead->usSourcePort=htons(usSourcePort);
lpHead->usDestinationPort=htons(usDestinationPort);
//No checksums yet
lpHead->usChecksum=0;
//Set windows to 3.0k
lpHead->usWindows=htons(512);
//Set the packet number
lpHead->ulAcknowledgeNumber=0;
//And the sequence
lpHead->ulSequenceNumber=htonl(m_uiSequence++);
//Data offset
lpHead->ucDataOffset=(ucHeaderLength >> 2) << 4;
//Flags
lpHead->ucFlags=0;
//Urgent pointer
lpHead->usUrgentPointer=0;
//Return it to the user
return lpHead;
}
ERROR_HANDLER_RETURN("ConstructTCPHeader",NULL)
See Also
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