zmq_unbind - Stop accepting connections on a socket

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0MQ 4.3.5                                          03/31/2024                                      ZMQ_UNBIND(3)

       The zmq_unbind() function shall unbind a socket specified by the socket argument from the endpoint
       specified by the endpoint argument.

       Additionally the incoming message queue associated with the endpoint will be discarded. This means that
       after unbinding an endpoint it is possible to received messages originating from that same endpoint if
       they were already present in the incoming message queue before unbinding.

       The endpoint argument is as described in zmq_bind(3)

   Unbindingwild-cardaddressfromasocket
       When wild-card * endpoint (described in zmq_tcp(7), zmq_ipc(7), zmq_udp(7) and zmq_vmci(7)) was used in
       zmq_bind(), the caller should use real endpoint obtained from the ZMQ_LAST_ENDPOINT socket option to
       unbind this endpoint from a socket.

EINVAL
           The endpoint supplied is invalid.

       ETERM
           The 0MQ context associated with the specified socket was terminated.

       ENOTSOCK
           The provided socket was invalid.

       ENOENT
           The endpoint supplied was not previously bound.

UnbindasubscribersocketfromaTCPtransport.

           /* Create a ZMQ_SUB socket */
           void *socket = zmq_socket (context, ZMQ_SUB);
           assert (socket);
           /* Connect it to the host server001, port 5555 using a TCP transport */
           rc = zmq_bind (socket, "tcp://127.0.0.1:5555");
           assert (rc == 0);
           /* Disconnect from the previously connected endpoint */
           rc = zmq_unbind (socket, "tcp://127.0.0.1:5555");
           assert (rc == 0);

       Unbindwild-card*bindedsocket.

           /* Create a ZMQ_SUB socket */
           void *socket = zmq_socket (context, ZMQ_SUB);
           assert (socket);
           /* Bind it to the system-assigned ephemeral port using a TCP transport */
           rc = zmq_bind (socket, "tcp://127.0.0.1:*");
           assert (rc == 0);
           /* Obtain real endpoint */
           const size_t buf_size = 32;
           char buf[buf_size];
           rc = zmq_getsockopt (socket, ZMQ_LAST_ENDPOINT, buf, (size_t *)&buf_size);
           assert (rc == 0);
           /* Unbind socket by real endpoint */
           rc = zmq_unbind (socket, buf);
           assert (rc == 0);

       zmq_unbind - Stop accepting connections on a socket

       Note that while the implementation is similar to zmq_disconnect(), the semantics are different and the
       two functions should not be used interchangeably. Bound sockets should be unbound, and connected sockets
       should be disconnected.

       The zmq_unbind() function shall return zero if successful. Otherwise it shall return -1 and set errno to
       one of the values defined below.

zmq_bind(3) zmq_socket(3) zmq(7)

       int zmq_unbind (void *socket, const char *endpoint);