Nping is an open source tool for network packet:
Nping can generate network packets for a wide range of protocols, allowing users full control over protocol headers.
While Nping can be used as a simple ping utility to detect active hosts, it can also be used as a raw packet generator for:
Nping's novel echo mode lets users see how packets change in transit between the source and destination hosts. That's a great way to understand firewall rules, detect packet corruption, and more.