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93 lines
2.8 KiB
Plaintext
93 lines
2.8 KiB
Plaintext
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zmq_connect_peer(3)
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===================
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NAME
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----
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zmq_connect_peer - create outgoing connection from socket and return the connection routing id in thread-safe and atomic way.
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SYNOPSIS
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--------
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*uint32_t zmq_connect_peer (void '*socket', const char '*endpoint');*
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DESCRIPTION
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-----------
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The _zmq_connect_peer()_ function connects a 'ZMQ_PEER' socket to an 'endpoint' and then returns the endpoint 'routing_id'.
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The 'endpoint' is a string consisting of a 'transport'`://` followed by an
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'address'. The 'transport' specifies the underlying protocol to use. The
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'address' specifies the transport-specific address to connect to.
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The function is supported only on the 'ZMQ_PEER' socket type and would return `0` with 'errno' set to 'ENOTSUP' otherwise.
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The _zmq_connect_peer()_ support the following transports:
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'tcp':: unicast transport using TCP, see linkzmq:zmq_tcp[7]
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'ipc':: local inter-process communication transport, see linkzmq:zmq_ipc[7]
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'inproc':: local in-process (inter-thread) communication transport, see linkzmq:zmq_inproc[7]
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'ws':: unicast transport using WebSockets, see linkzmq:zmq_ws[7]
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'wss':: unicast transport using WebSockets over TLS, see linkzmq:zmq_wss[7]
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RETURN VALUE
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------------
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The _zmq_connect_peer()_ function returns the peer 'routing_id' if successful. Otherwise it returns
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`0` and sets 'errno' to one of the values defined below.
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ERRORS
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------
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*EINVAL*::
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The endpoint supplied is invalid.
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*EPROTONOSUPPORT*::
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The requested 'transport' protocol is not supported with 'ZMQ_PEER'.
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*ENOCOMPATPROTO*::
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The requested 'transport' protocol is not compatible with the socket type.
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*ETERM*::
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The 0MQ 'context' associated with the specified 'socket' was terminated.
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*ENOTSOCK*::
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The provided 'socket' was invalid.
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*EMTHREAD*::
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No I/O thread is available to accomplish the task.
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*ENOTSUP*::
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The socket is not of type 'ZMQ_PEER'.
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*EFAULT*::
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The 'ZMQ_IMMEDIATE' option is set on the socket.
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EXAMPLE
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-------
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.Connecting a peer socket to a TCP transport and sending a message
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----
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/* Create a ZMQ_SUB socket */
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void *socket = zmq_socket (context, ZMQ_PEER);
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assert (socket);
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/* Connect it to the host server001, port 5555 using a TCP transport */
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uint32_t routing_id = zmq_connect (socket, "tcp://server001:5555");
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assert (routing_id == 0);
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/* Sending a message to the peer */
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zmq_msg_t msg;
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int rc = zmq_msg_init_data (&msg, "HELLO", 5, NULL, NULL);
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assert (rc == 0);
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rc = zmq_msg_set_routing_id (&msg, routing_id);
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assert (rc == 0);
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rc = zmq_msg_send (&msg, socket, 0);
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assert (rc == 5);
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rc = zmq_msg_close (&msg);
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assert (rc == 0);
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----
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SEE ALSO
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--------
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linkzmq:zmq_connect[3]
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linkzmq:zmq_bind[3]
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linkzmq:zmq_socket[3]
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linkzmq:zmq[7]
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AUTHORS
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-------
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This page was written by the 0MQ community. To make a change please
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read the 0MQ Contribution Policy at <http://www.zeromq.org/docs:contributing>.
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