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-.TH zmq_socket 3 "" "(c)2007-2010 iMatix Corporation" "0MQ User Manuals"
-.SH NAME
-zmq_socket \- creates 0MQ socket
-.SH SYNOPSIS
-.B void *zmq_socket (void *context, int type);
-.SH DESCRIPTION
-Open a socket within the specified
-.IR context .
-To create a context, use
-.IR zmq_init
-function.
-.IR type
-argument can be one of the values defined below. Note that each socket is owned
-by exactly one thread (the one that it was created from) and should not be used
-from any other thread.
-
-.IP "\fBZMQ_P2P\fP"
-Socket to communicate with a single peer. Allows for only a single connect or a
-single bind. There's no message routing or message filtering involved.
-
-Compatible peer sockets: ZMQ_P2P.
-
-.IP "\fBZMQ_PUB\fP"
-Socket to distribute data. Recv function is not implemented for this socket
-type. Messages are distributed in fanout fashion to all the peers.
-
-Compatible peer sockets: ZMQ_SUB.
-
-.IP "\fBZMQ_SUB\fP"
-Socket to subscribe for data. Send function is not implemented for this
-socket type. Initially, socket is subscribed for no messages. Use ZMQ_SUBSCRIBE
-option to specify which messages to subscribe for.
-
-Compatible peer sockets: ZMQ_PUB.
-
-.IP "\fBZMQ_REQ\fP"
-Socket to send requests and receive replies. Requests are load-balanced among
-all the peers. This socket type allows only an alternated sequence of
-send's and recv's.
-
-Compatible peer sockets: ZMQ_REP, ZMQ_XREP.
-
-.IP "\fBZMQ_REP\fP"
-Socket to receive requests and send replies. This socket type allows
-only an alternated sequence of recv's and send's. Each send is routed to
-the peer that issued the last received request.
-
-Compatible peer sockets: ZMQ_REQ, ZMQ_XREQ.
-
-.IP "\fBZMQ_XREQ\fP"
-Special socket type to be used in request/reply middleboxes such as
-.BR zmq_queue(7) .
-Requests forwarded using this socket type should be tagged by a proper prefix
-identifying the original requester. Replies received by this socket are tagged
-with a proper postfix that can be use to route the reply back to the original
-requester.
-
-Compatible peer sockets: ZMQ_REP, ZMQ_XREP.
-
-.IP "\fBZMQ_XREP\fP"
-Special socket type to be used in request/reply middleboxes such as
-.BR zmq_queue(7) .
-Requests received using this socket are already properly tagged with prefix
-identifying the original requester. When sending a reply via XREP socket the
-message should be tagged with a prefix from a corresponding request.
-
-Compatible peer sockets: ZMQ_REQ, ZMQ_XREQ.
-
-.IP "\fBZMQ_UPSTREAM\fP"
-Socket to receive messages from up the stream. Messages are fair-queued
-from among all the connected peers. Send function is not implemented for
-this socket type.
-
-Compatible peer sockets: ZMQ_DOWNSTREAM.
-
-.IP "\fBZMQ_DOWNSTREAM\fP"
-Socket to send messages down stream. Messages are load-balanced among all the
-connected peers. Recv function is not implemented for this socket type.
-
-Compatible peer sockets: ZMQ_UPSTREAM.
-
-.SH RETURN VALUE
-Function returns socket handle is successful. Otherwise it returns NULL and
-sets errno to one of the values below.
-.SH ERRORS
-.IP "\fBEINVAL\fP"
-invalid socket type.
-.IP "\fBEMTHREAD\fP"
-the number of application threads allowed to own 0MQ sockets was exceeded. See
-.IR app_threads
-parameter to
-.IR zmq_init
-function.
-.SH EXAMPLE
-.nf
-void *s = zmq_socket (context, ZMQ_PUB);
-assert (s);
-int rc = zmq_bind (s, "tcp://192.168.0.1:5555");
-assert (rc == 0);
-.fi
-.SH SEE ALSO
-.BR zmq_init (3)
-.BR zmq_setsockopt (3)
-.BR zmq_bind (3)
-.BR zmq_connect (3)
-.BR zmq_send (3)
-.BR zmq_flush (3)
-.BR zmq_recv (3)
-.SH AUTHOR
-Martin Sustrik <sustrik at 250bpm dot com>