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Man Pages
ZMQ_UNBIND(3) 0MQ Manual ZMQ_UNBIND(3)

zmq_unbind - Stop accepting connections on a socket

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

The zmq_unbind() function shall unbind a socket specified by the socket argument from the endpoint specified by the endpoint argument.
The endpoint argument is as described in zmq_bind(3)

When wild-card * endpoint (described in zmq_tcp(7), zmq_ipc(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.

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

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.

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);

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

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.
12/13/2017 0MQ 4.2.3

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