zmq_connect(3)

SYNOPSIS

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

DESCRIPTION

The zmq_connect() function shall connect the socket referenced by the -socket argument to the endpoint specified by the endpoint 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:

-inproc -: -
-local in-process (inter-thread) communication transport, see zmq_inproc(7) -
-
-ipc -: -
-local inter-process communication transport, see zmq_ipc(7) -
-
-tcp -: -
-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.

- - - -

Note

The connection will not be performed immediately but as needed by ØMQ. -Thus a successful invocation of zmq_connect() does not indicate that a -physical connection was or can actually be established.

RETURN VALUE

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

ERRORS

-EPROTONOSUPPORT -: -
-The requested transport protocol is not supported. -
-
-ENOCOMPATPROTO -: -
-The requested transport protocol is not compatible with the socket type. -
-
-ETERM -: -
-The ØMQ context associated with the specified socket was terminated. -
-
-EFAULT -: -
-The provided socket was not valid (NULL). -
-

EXAMPLE

Connecting a subscriber socket to an in-process and a TCP transport

/* Create a ZMQ_SUB socket */
-void *socket = zmq_socket (context, ZMQ_SUB);
-assert (socket);
-/* Connect it to an in-process transport with the address 'my_publisher' */
-int rc = zmq_connect (socket, "inproc://my_publisher");
-assert (rc == 0);
-/* Connect it to the host server001, port 5555 using a TCP transport */
-rc = zmq_connect (socket, "tcp://server001:5555");
-assert (rc == 0);

AUTHORS

The ØMQ documentation was written by Martin Sustrik <sustrik@250bpm.com> and -Martin Lucina <mato@kotelna.sk>.

-zmq_connect(3) Manual Page -