Tool for drawing protocol sequence diagrams

mscgen can do this, using the arcgradient option. This snippet wil render the second part of your example exactly:

msc {
  arcgradient=20;

  client, server;
  client => server [label="SYN"];
  server => client [label="SYN + ACK"];
  client => server [label="ACK"];
}

If you copy paste this snippet in the mscgen_js on line demo, you'll see.


I've been using websequencediagrams. Essentially a webapp version of mscgen with a few different fancy renderers.

enter image description here

Websequencediagrams also exposes their diagram rendering as a script API. Now I store my diagrams as HTML files, commit them to git, show nice diffs, etc. I.e.,

<html>
<body>
<div class="wsd" wsd_style="rose"><pre>
App->set_state PAUSE
<!-- your wsd diagram commands, etc... -->
</pre></div>
<script type="text/javascript" src="http://www.websequencediagrams.com/service.js"></script>
</body>
</html>

For anyone else in need, there is a cool command-line tool mscgen.

Tags:

Sequence Diagram

Protocols

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