Zmq_unbind (3) Linux Manual Page

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 argument from the endpoint specified by the endpoint argument.

The endpoint argument is as described in zmq_bind(3)

Unbinding wild-card addres from a socket

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

Examples

Unbind a subscriber socket from a TCP transport.

/* 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);

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);

Authors

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zmq_unbind (3) Linux Manual Page