Capedit is an Open Source PCAP Based Network Protocol Testing Tool. The tools is developed In C and GTK+ (Currently Supported on Linux only).
The product contain Protocol Field Value Modification, facilities for Packet Deletion, Duplication and Reordering. TCP and UDP Stream based Field Value Modification, IP and MAC Address Find And Replace functionality, Auto CheckSum for IP, ICMP, IGMP, TCP and UDP Protocols as well as Interface Selection For Sending Packets. There are also options for Sending Single Selected Packet and Pcap Replay.
Capedit – Network Protocol Testing Tool Support Forum