zmq_bind man page

zmq_bind — accept connections on a socket


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


The zmq_bind() function shall create an endpoint for accepting connections and bind it to the socket referenced by the socket argument.

The endpoint argument is a string consisting of two parts as follows: transport://address. The transport part specifies the underlying transport protocol to use. The meaning of the address part is specific to the underlying transport protocol selected.

The following transports are defined:


local in-process (inter-thread) communication transport, see zmq_inproc(7)


local inter-process communication transport, see zmq_ipc(7)


unicast transport using TCP, see zmq_tcp(7)

pgm, epgm

reliable multicast transport using PGM, see zmq_pgm(7)

With the exception of ZMQ_PAIR sockets, a single socket may be connected to multiple endpoints using zmq_connect(), while simultaneously accepting incoming connections from multiple endpoints bound to the socket using zmq_bind(). Refer to zmq_socket(3) for a description of the exact semantics involved when connecting or binding a socket to multiple endpoints.

Return Value

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



The endpoint supplied is invalid.


The requested transport protocol is not supported.


The requested transport protocol is not compatible with the socket type.


The requested address is already in use.


The requested address was not local.


The requested address specifies a nonexistent interface.


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


The provided socket was invalid.


No I/O thread is available to accomplish the task.


Binding a publisher socket to an in-process and a TCP transport.

/* Create a ZMQ_PUB socket */
void *socket = zmq_socket (context, ZMQ_PUB);
assert (socket);
/* Bind it to a in-process transport with the address 'my_publisher' */
int rc = zmq_bind (socket, "inproc://my_publisher");
assert (rc == 0);
/* Bind it to a TCP transport on port 5555 of the 'eth0' interface */
rc = zmq_bind (socket, "tcp://eth0:5555");
assert (rc == 0);

See Also

zmq_connect(3) zmq_socket(3) zmq(7)


This manual page was written by the 0MQ community.

Referenced By

zmq(7), zmq_connect(3), zmq_cpp(7), zmq_device(3), zmq_inproc(7), zmq_ipc(7), zmq_proxy(3), zmq_socket(3), zmq_tcp(7), zmq_unbind(3).

04/04/2012 0MQ 2.2.0 0MQ Manual