given a pcap file, how to find if a src ip address is local or remote using jpcap

Question

Given a pcap file, how can I find out which src ip addresses are local and which are remote using jpcap? Can any one guide me?

Answer 1

You can't.

There's nothing intrinsic in a pcap entry to tell you whether the packet was inbound or outbound.

You'll need a configuration file to tell you which IPs are considered "local".