pkthisto is a packet traffic analysis program specifically designed for generating inter-packet arrival time histograms, packet length histograms, and packet rate plots for UDP/IP traffic. pkthisto was orignally written to assist in analysing online game traffic in and out of QuakeIII Arena servers. pkthisto can take input from real time capture (where Berkeley packet filter, BPF, is supported by the OS), tcpdump tracefiles, or NAI Sniffer tracefiles.
As of version 0.2, pkthisto can also handle the IP packet addressing used by XBox "system link" games (either captured in real-time or post-processed from tcpdump files).
As of version 0.3 pkthisto records the average TTL (time to live) value of packets coming from game clients.
pkthisto was written by Grenville Armitage and is released under the GNU General Public License.
For more information check the README.
pkthisto 0.3.4 can be downloaded here.
Old versions of pkthisto can be downloaded from here.