[zeromq-dev] How do I get the sock fd of the client while receiving the message using zmq_msg_recv()?

[Bharat Somani]

I am using ZMQ zmq_msg_recv() for receiving client connections and
requests, How do I get the sock fd of the client who has sent this message?
I have read somewhere that this feature is added in ZMQ 4 but somehow not
able to locate which API gives the sock fd.

Any pointers in this regards?

Regards,
Bharat
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