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CalculateChecksum() |
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| Public Function |
Declared in: SpoofSocket.h |
Declaration
static unsigned short CalculateChecksum(
const unsigned short* pBuffer,
int iSize);
DescriptionCalculate the data checksum
Function Body
try
{
unsigned long usChksum=0;
//Calculate the checksum
while (iSize>1)
{
usChksum+=*pBuffer++;
iSize-=sizeof(unsigned short);
}
//If we have one char left
if (iSize)
usChksum+=*(unsigned char*)pBuffer;
//Complete the calculations
usChksum=(usChksum >> 16) + (usChksum & 0xffff);
usChksum+=(usChksum >> 16);
//Return the value (inversed)
return (unsigned short)(~usChksum);
}
ERROR_HANDLER_STATIC_RETURN(CSpoofSocket_LOGNAME,"CalculateChecksum",0)
See Also
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