ZMQ_CONNECT(3)
NAME
zmq_connect - connect a socket
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
0MQ. 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 0MQ context associated with the specified socket was terminated.
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);
SEE ALSO
zmq_bind(3) zmq_socket(3) zmq(7)
AUTHORS
The 0MQ documentation was written by Martin Sustrik
<sustrik@250bpm.com[1]> and Martin Lucina <mato@kotelna.sk[2]>.
NOTES
- 1. sustrik@250bpm.com
- mailto:sustrik@250bpm.com
- 2. mato@kotelna.sk
mailto:mato@kotelna.sk