ZMQ_CONNECT_PEER(3) 0MQ Manual ZMQ_CONNECT_PEER(3) NAME zmq_connect_peer - create outgoing connection from socket and return the connection routing id in thread-safe and atomic way. SYNOPSIS uint32_t zmq_connect_peer (void *socket, const char *endpoint); DESCRIPTION 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 ad- dress. 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: tcp unicast transport using TCP, see zmq_tcp(7) ipc local inter-process communication transport, see zmq_ipc(7) inproc local in-process (inter-thread) communication transport, see zmq_in- proc(7) ws unicast transport using WebSockets, see zmq_ws(7) wss unicast transport using WebSockets over TLS, see zmq_wss(7) RETURN VALUE 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. ERRORS EINVAL The endpoint supplied is invalid. EPROTONOSUPPORT The requested transport protocol is not supported with ZMQ_PEER. ENOCOMPATPROTO The requested transport protocol is not compatible with the socket type. ETERM The 0MQ context associated with the specified socket was terminated. ENOTSOCK The provided socket was invalid. EMTHREAD No I/O thread is available to accomplish the task. ENOTSUP The socket is not of type ZMQ_PEER. EFAULT The ZMQ_IMMEDIATE option is set on the socket. EXAMPLE 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); SEE ALSO zmq_connect(3) zmq_bind(3) zmq_socket(3) zmq(7) AUTHORS This page was written by the 0MQ community. To make a change please read the 0MQ Contribution Policy at http://www.zeromq.org/docs:contributing. 0MQ 4.3.5 10/09/2023 ZMQ_CONNECT_PEER(3)
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLE | SEE ALSO | AUTHORS
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