[Ipdecap] Decapsulate traffic encapsulated within GRE, IPIP, 6in4, ESP (ipsec) protocols

Ipdecap can decapsulate traffic encapsulated within GRE, IPIP, 6in4, ESP ipsec protocols, and can also remove IEEE 802.1Q virtual lan header. It reads packets from an pcap file, removes the encapsulation protocol, and writes them to another pcap file. Goals are: Extract encapsulated tcp flow to...