[zeromq-dev] Description of binary protocol used by ZMQ

Martin Sustrik sustrik at 250bpm.com
Tue Mar 1 10:28:08 CET 2011

Hi Hans,

> Are there any papers or documents describing the binary protocol used by ZMQ?
> Or is the source code the only documentation?

See zmq_tcp(7) for TCP framing, zmq_pgm(7) for PGM/EPGM framing etc.

As for aggregation of backpaths in REQ/REP see here:



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