ZMQ_UNBIND(3) 0MQ Manual ZMQ_UNBIND(3) NAME zmq_unbind - Stop accepting connections on a socket SYNOPSIS int zmq_unbind (void *socket, const char *endpoint); DESCRIPTION The zmq_unbind() function shall unbind a socket specified by the socket ar- gument 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) Unbinding wild-card address from a socket 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 end- point obtained from the ZMQ_LAST_ENDPOINT socket option to unbind this end- point from a socket. RETURN VALUE The zmq_unbind() function shall return zero if successful. Otherwise it shall return -1 and set errno to one of the values defined below. ERRORS 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. EXAMPLES Unbind a subscriber socket from a TCP transport. /* 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); Unbind wild-card * binded socket. /* 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); NOTE Note that while the implementation is similar to zmq_disconnect(), the se- mantics are different and the two functions should not be used interchange- ably. Bound sockets should be unbound, and connected sockets should be dis- connected. SEE ALSO zmq_bind(3) zmq_socket(3) zmq(7) AUTHORS This page was written by the 0MQ community. To make a change please read the 0MQ Contribution Policy at http://www.zeromq.org/docs:contributing. 0MQ 4.3.5 10/09/2023 ZMQ_UNBIND(3)
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLES | NOTE | SEE ALSO | AUTHORS
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