[zeromq-dev] How to get client's identity

[David Jelenc]

Another option would also be to use ZAP to authenticate clients. Once a 
client is authenticated, key-value (meta-data) pairs are added to each 
message so you always know whom each message came from.

On 19. 07. 2016 15:45, Diego Fons wrote:
> Hi,
>
> ZMQ_IDENTITY is used only with DEALER socket. You can not retrive client
> information with PUSH/PULL sockets (they are not implemented for this).
>
> You can:
> 1) Re-implement your application to use DEALER/ROUTER or
> 2) Implement an abstraction layer that provides client identification
> (ie. build your own protocol).
>
> I'd choose the first one, but I don't know the main purpose of the
> application.
>
> Regards.
>
> On Tue, Jul 19, 2016 at 9:31 AM, Bharat Somani <bharatdsomani at gmail.com
> <mailto:bharatdsomani at gmail.com>> wrote:
>
>
>     Hi All,
>
>     I have a process A which is creating ZMQ_PULL type of socket and
>     bind on some port.
>
>     Now I have process B, C, D (all on same system) which all creates
>     ZMQ_PUSH types of sockets in each process respectively and connects
>     to the port on same system on which process A is bind to.
>
>     In process A I am using API zmq_msg_recv() for receiving the
>     messages. Now I want to identify the process (A or B or C) from
>     which that message is received.
>     is there any way to know which process has sent this message?
>
>     I tried to set the ZMQ_IDENTITY in client processes (B,C & D) but
>     dont know how to get the identity from received message on the
>     server process A
>
>     Any pointer in this regard?
>
>
>
>     --
>     With warm regards,
>     Bharat
>
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>
>
> --
> Diego Andrés Fons
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