net/tcptrace 6.6.7nb2 NetBSD

tcptrace is a TCP dump file analysis tool written by Shawn Ostermann at Ohio University. It is NOT a packet capturing program. It reads output dump files in the formats of several popular packet capturing programs: tcpdump, snoop, etherpeek, and netm.

For each connection, it keeps track of elapsed time, bytes/segments sent and received, retransmissions, round trip times, window advertisements, throughput, etc. Its output format ranges from Simple to Long to Very Detailed.

It can also produce three different types of graphs, as follows:

Time Sequence Graph This is the format that Tim Shepard started using at MIT some years ago. It shows segments sent and ACKs returned as a function of time. Instantaneous Throughput This format shows the instantaneous (averaged over a few segments) throughput of the connection as a function of time. Round Trip Times This format shows the round trip times for the ACKs as a function of time.

The graphs produced are viewable only by Tim Shepard's wonderful xplot.