Manual Reference Pages - ZMQ_CONNECT (3)
zmq_connect - create outgoing connection from socket
int zmq_connect (void *socket, const char *endpoint);
The zmq_connect() function connects the socket to an endpoint and then accepts incoming connections on that endpoint.
The endpoint is a string consisting of a transport:// followed by an address. The transport specifies the underlying protocol to use. The address specifies the transport-specific address to connect to.
0MQ provides the the following transports:
unicast transport using TCP, see
local inter-process communication transport, see
local in-process (inter-thread) communication transport, see
reliable multicast transport using PGM, see
Every 0MQ socket type except ZMQ_PAIR supports one-to-many and many-to-one semantics. The precise semantics depend on the socket type and are defined in zmq_socket(3).
for most transports and socket types the connection is not performed immediately but as needed by 0MQ. Thus a successful call to zmq_connect() does not mean that the connection was or could actually be established. Because of this, for most transports and socket types the order in which a server socket is bound and a client socket is connected to it does not matter. The first exception is when using the inproc:// transport: you must call zmq_bind() before calling zmq_connect(). The second exception are ZMQ_PAIR sockets, which do not automatically reconnect to endpoints.
following a zmq_connect(), for socket types except for ZMQ_ROUTER, the socket enters its normal ready state. By contrast, following a zmq_bind() alone, the socket enters a mute state in which the socket blocks or drops messages according to the socket type, as defined in zmq_socket(3). A ZMQ_ROUTER socket enters its normal ready state for a specific peer only when handshaking is complete for that peer, which may take an arbitrary time.
The zmq_connect() function returns zero if successful. Otherwise it returns -1 and sets errno to one of the values defined below.
The endpoint supplied is invalid.
protocol is not supported.
protocol is not compatible with the socket type.
associated with the specified
No I/O thread is available to accomplish the task.
Connecting a subscriber socket to an in-process and a TCP transport.
/* Create a ZMQ_SUB socket */
void *socket = zmq_socket (context, ZMQ_SUB);
/* 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);
zmq_bind(3) zmq_socket(3) zmq(7)
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|0MQ 4&.1&.4 ||ZMQ_CONNECT (3) ||12/18/2015 |
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