Class CSpoofSocket::
CalculateChecksum()
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Protected Function Declared in:
SpoofSocket.h

'Declaration' icon -- Shortcut to top of page. Declaration

unsigned short CalculateChecksum(
    const unsigned short* usBuf,
    int iSize) const;

'Description' icon -- Shortcut to top of page. Description

Calculate the data checksum

'Function Body' icon -- Shortcut to top of page. Function Body

try
{
    unsigned long usChksum=0;

    //Calculate the checksum
    while (iSize>1)
    {
        usChksum+=*usBuf++;
        iSize-=sizeof(unsigned short);
    }

    //If we have one char left
    if (iSize)
        usChksum+=*(unsigned char*)usBuf;

    //Complete the calculations
    usChksum=(usChksum >> 16) + (usChksum & 0xffff);
    usChksum+=(usChksum >> 16);

    //Return the value (inversed)
    return (unsigned short)(~usChksum);
}
ERROR_HANDLER_RETURN("CalculateChecksum",0)

'See Also' icon -- Shortcut to top of page. See Also

Class Overview Class Overview  |  Public base class CSpoofBase  |  Hierarchy Chart Hierarchy Chart


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