Re: [Discuss-gnuradio] ZMQ REQ / REP naming Swap?

[Johnathan Corgan]

On Thu, Jul 28, 2016 at 12:20 PM, Michael Dickens <address@hidden> wrote:

 

OK. I think the issue is that's not how ZMQ is designed to work with
respect to REQ/REP.  I think it's designed to do "sink -> REQ -> ZMQ ->
REP -> source", so that the REQ is a sink & REP is a source. In a quick
internet search, this model is what I turn up. GR's model is the name
swap of this model; it would work internally to GR, but I won't be able
to connect GR to the outside world (or, at least my application) because
of this swapping.

​The ZMQ REQ/REP dataflow has the receiving end REQuest data from the sending end when needed, which REPlies with a packet.  It's a form of flow control.

From the GNU Radio perspective, streams flow into GNU Radio sinks to exit the flowgraph, and data is sourced into a flowgraph from a GNU Radio source block.

Thus, the correct model is GR Stream | GR REP Sink | ZMQ REP | ZMQ Transport | ZMQ REQ |  GR REQ source | GR stream

​-Johnathan