uint32_t zmq_connect_peer (void *socket, const char *endpoint);
The zmq_connect_peer() function connects a ZMQ_PEER socket to an endpoint and then returns the endpoint routing_id.
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.
The function is supported only on the ZMQ_PEER socket type and would return 0 with errno set to ENOTSUP otherwise.
The zmq_connect_peer() support the following transports:
unicast transport using TCP, see zmq_tcp(7)
local inter-process communication transport, see zmq_ipc(7)
local in-process (inter-thread) communication transport, see zmq_inproc(7)
unicast transport using WebSockets, see zmq_ws(7)
unicast transport using WebSockets over TLS, see zmq_wss(7)
The zmq_connect_peer() function returns the peer routing_id if successful. Otherwise it returns 0 and sets errno to one of the values defined below.
The endpoint supplied is invalid.
The requested transport protocol is not supported with ZMQ_PEER.
The requested transport protocol is not compatible with the socket type.
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.
The socket is not of type ZMQ_PEER.
The ZMQ_IMMEDIATE option is set on the socket.
Connecting a peer socket to a TCP transport and sending a message.
/* Create a ZMQ_SUB socket */ void *socket = zmq_socket (context, ZMQ_PEER); assert (socket); /* Connect it to the host server001, port 5555 using a TCP transport */ uint32_t routing_id = zmq_connect (socket, "tcp://server001:5555"); assert (routing_id == 0); /* Sending a message to the peer */ zmq_msg_t msg; int rc = zmq_msg_init_data (&msg, "HELLO", 5, NULL, NULL); assert (rc == 0); rc = zmq_msg_set_routing_id (&msg, routing_id); assert (rc == 0); rc = zmq_msg_send (&msg, socket, 0); assert (rc == 5); rc = zmq_msg_close (&msg); assert (rc == 0);
zmq_connect(3) zmq_bind(3) zmq_socket(3) zmq(7)
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