[zeromq-dev] [Q] proper message sequence for XREQ to XREP and back again

[Jon Dyte]

Chuck Remes wrote:
>
> Slight correction. You *should* prepend your original message with a null packet so that the server at the end of the line can see the separator/delimiter between the routing info and the body parts.
>
>   
Chuck

Having just followed yr thread, I realised that this means the REQ 
socket  type must add the null delimiter for you, and sure enough the 
code is there to do that.
It generates an empty prefix.

It's a bit awkward that you have to remember to do it manually with XREQ 
and presumably set the more flag as well.

Jon