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'\" t
.\" Title: zmq_connect
.\" Author: [see the "AUTHORS" section]
.\" Generator: DocBook XSL Stylesheets v1.75.2 <http://docbook.sf.net/>
.\" Date: 04/04/2012
.\" Manual: 0MQ Manual
.\" Source: 0MQ 2.2.0
.\" Language: English
.\"
.TH "ZMQ_CONNECT" "3" "04/04/2012" "0MQ 2\&.2\&.0" "0MQ Manual"
.\" -----------------------------------------------------------------
.\" * Define some portability stuff
.\" -----------------------------------------------------------------
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.\" http://bugs.debian.org/507673
.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.ie \n(.g .ds Aq \(aq
.el .ds Aq '
.\" -----------------------------------------------------------------
.\" * set default formatting
.\" -----------------------------------------------------------------
.\" disable hyphenation
.nh
.\" disable justification (adjust text to left margin only)
.ad l
.\" -----------------------------------------------------------------
.\" * MAIN CONTENT STARTS HERE *
.\" -----------------------------------------------------------------
.SH "NAME"
zmq_connect \- connect a socket
.SH "SYNOPSIS"
.sp
\fBint zmq_connect (void \fR\fB\fI*socket\fR\fR\fB, const char \fR\fB\fI*endpoint\fR\fR\fB);\fR
.SH "DESCRIPTION"
.sp
The \fIzmq_connect()\fR function shall connect the socket referenced by the \fIsocket\fR argument to the endpoint specified by the \fIendpoint\fR argument\&.
.sp
The \fIendpoint\fR argument is a string consisting of two parts as follows: \fItransport\fR://\fIaddress\fR\&. The \fItransport\fR part specifies the underlying transport protocol to use\&. The meaning of the \fIaddress\fR part is specific to the underlying transport protocol selected\&.
.sp
The following transports are defined:
.PP
\fIinproc\fR
.RS 4
local in\-process (inter\-thread) communication transport, see
\fBzmq_inproc\fR(7)
.RE
.PP
\fIipc\fR
.RS 4
local inter\-process communication transport, see
\fBzmq_ipc\fR(7)
.RE
.PP
\fItcp\fR
.RS 4
unicast transport using TCP, see
\fBzmq_tcp\fR(7)
.RE
.PP
\fIpgm\fR, \fIepgm\fR
.RS 4
reliable multicast transport using PGM, see
\fBzmq_pgm\fR(7)
.RE
.sp
With the exception of \fIZMQ_PAIR\fR sockets, a single socket may be connected to multiple endpoints using \fIzmq_connect()\fR, while simultaneously accepting incoming connections from multiple endpoints bound to the socket using \fIzmq_bind()\fR\&. Refer to \fBzmq_socket\fR(3) for a description of the exact semantics involved when connecting or binding a socket to multiple endpoints\&.
.if n \{\
.sp
.\}
.RS 4
.it 1 an-trap
.nr an-no-space-flag 1
.nr an-break-flag 1
.br
.ps +1
\fBNote\fR
.ps -1
.br
.sp
The connection will not be performed immediately but as needed by 0MQ\&. Thus a successful invocation of \fIzmq_connect()\fR does not indicate that a physical connection was or can actually be established\&.
.sp .5v
.RE
.SH "RETURN VALUE"
.sp
The \fIzmq_connect()\fR function shall return zero if successful\&. Otherwise it shall return \-1 and set \fIerrno\fR to one of the values defined below\&.
.SH "ERRORS"
.PP
\fBEINVAL\fR
.RS 4
The endpoint supplied is invalid\&.
.RE
.PP
\fBEPROTONOSUPPORT\fR
.RS 4
The requested
\fItransport\fR
protocol is not supported\&.
.RE
.PP
\fBENOCOMPATPROTO\fR
.RS 4
The requested
\fItransport\fR
protocol is not compatible with the socket type\&.
.RE
.PP
\fBETERM\fR
.RS 4
The 0MQ
\fIcontext\fR
associated with the specified
\fIsocket\fR
was terminated\&.
.RE
.PP
\fBENOTSOCK\fR
.RS 4
The provided
\fIsocket\fR
was invalid\&.
.RE
.PP
\fBEMTHREAD\fR
.RS 4
No I/O thread is available to accomplish the task\&.
.RE
.SH "EXAMPLE"
.PP
\fBConnecting a subscriber socket to an in-process and a TCP transport\fR.
.sp
.if n \{\
.RS 4
.\}
.nf
/* Create a ZMQ_SUB socket */
void *socket = zmq_socket (context, ZMQ_SUB);
assert (socket);
/* Connect it to an in\-process transport with the address \*(Aqmy_publisher\*(Aq */
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);
.fi
.if n \{\
.RE
.\}
.sp
.SH "SEE ALSO"
.sp
\fBzmq_bind\fR(3) \fBzmq_socket\fR(3) \fBzmq\fR(7)
.SH "AUTHORS"
.sp
This manual page was written by the 0MQ community\&.
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