Counts the IP packets checksum.

Syntax:

WORD __stdcall PktInetCheckSum(LPVOID pData, DWORD Length);

Parameters:

pData

[in] A pointer to the packet.

Length

[in] The packet size.

Return values:

If the function succeeds, the return value will be the IP packet's checksum, otherwise it returns 0.

Description:

PktInetCheckSum counts and returns the packets checksum. It implements a common algorithm of the IP protocols family checksums counting according to RFC 1071.