Small tool to generate ladder diagrams for network protocols. obsoleted by mscgen.
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gen_ladder - tool to generate protocol ladder diagrams
(C) 2010-2011 by Harald Welte <>

This tool can be used to generate typical ladder diagrams as they are often
used in the description of networking protocols.

The input file is a ".lad" file, from which generates a PNG

As an example, I have included a "test.lad" file, which you can process by
make test.png