GASP is a generic protocol encoder and decoder. It offers a complete scripting language (based on Tcl) which allows you to construct or analyze any packet of data based on abstract protocol definition. This version includes all the basics networking protocols (IP, ARP, ICMP, TCP, UDP, and DNS), some protocols for archivers (ZIP, GZIP, and TAR), and some multimedia protocols (JPEG, GIF, and PNG).
