libpcapnav is a libpcap wrapper library that allows navigation to
arbitrary locations in a tcpdump trace file between reads. The API is
intentionally much like that of the pcap library. You can navigate in
trace files both in time and space. You can jump to a packet which is
at approximately 2/3 of the trace, or you can jump as closely as
possible to a packet with a given timestamp, and then read packets
from there. In addition, the API provides convenience functions for
manipulating timeval structures.
