Hi all, I'd like to extend the ZMTP wire level protocol to allow space for control commands and other experimentation.
See http://rfc.zeromq.org/spec:13 Specifically, there is an 8-bit header in each frame, of which 1 bit is used today. I'd like to use further bits: * To indicate that the frame is a "control command", which would be interpreted by the socket / pattern without being passed to applications. Some possible control commands are ping/pong keep-alive, ready indicator, etc. * To indicate that the frame is a "label", i.e. used for routing. I've no concrete design proposal to replace the current envelope system, this would be a place for experimentation. In terms of backwards compatibility, it seems the best we can do is add a version header to the protocol, and check this in 2.1 and later branches. I'd suggest the new wire level protocol be used in 2.2 and 3.0, and as we learn how to properly layer this, we can make further changes to the protocol. I'm not sure whether people would prefer to experiment with new patterns / socket types & semantics in 2.2 or in 3.0...? -Pieter _______________________________________________ zeromq-dev mailing list [email protected] http://lists.zeromq.org/mailman/listinfo/zeromq-dev
