The libtcpcsm software is designed to facilitate the analysis of TCP sending
behaviour, i.e. detecting loss and reordering events or tracking congestion
window size, in packet header traces.
It is based on the libtrace trace processing library.

The software consists of both libtcpcsm, a library that passively detects TCP
congestion events in network traffic traces, and a series of tools built using
libtcpcsm.

Libtcpcsm is developed by the WAND Network Research Group at Waikato
University in New Zealand.