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Re:WireEdit – A Full Stack WYSIWYG Editor for Network Packets by jnazario on Monday November 10, 2014 @03:44PM (#8586251)
if you're looking for an OSS variant of this (packet editor with a GUI), have a look at Netdude:

http://netdude.sourceforge.net/

older package, but does basically this.

Re:WireEdit – A Full Stack WYSIWYG Editor for Network Packets by lucb1e on Monday November 10, 2014 @08:06PM (#8587682)
> Copyright 2006, last update June 2007

That sure is what it looks like. But thanks for sharing anyway, interesting project