An inter-network checksum algorithm written with Golang

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The Internet checksum algorithm is suitable for the verification of IP, TCP, UDP, ICMP and other protocols.

The func CheckSum (data []byte) uint16 {var (sum    uint32length int = len (data) index  int)//is summed in every 16 bits, Until all of the bytes have been exhausted or only a 8-bit byte is left (if the remaining one 8-bit byte indicates an odd number of bytes) for length > 1 {sum + = UInt32 (Data[index]) <<8 + uint32 (data[index+ 1]) Index + = 2length-= 2}//If the number of bytes is odd, add the last remaining 8 bytes if length > 0 {sum + = UInt32 (Data[index])}//plus the high 16-bit carry portion of sum + = (sum & gt;> 16)//Do not forget to return the time of the first reverse return uint16 (^sum)}