Module checksum 

UDP checksum calculation and verification.

UDP uses the same pseudo-header as TCP for checksum calculation. For IPv4, the checksum is optional (can be 0), but for IPv6 it’s mandatory. Per RFC 768, if the computed checksum is 0, it should be set to 0xFFFF.

Functions

udp_checksum_ipv4

Calculate UDP checksum with IPv4 pseudo-header.

udp_checksum_ipv6

Calculate UDP checksum with IPv6 pseudo-header.

verify_udp_checksum_ipv4

Verify UDP checksum with IPv4 pseudo-header.

verify_udp_checksum_ipv6

Verify UDP checksum with IPv6 pseudo-header.