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</head>
<body class="manpage">
<div id="header">
<h1>nn_connect(3) Manual Page</h1>
<h2>NAME</h2>
<div class="sectionbody">
<p>nn_connect - add a remote endpoint to the socket</p>
</div>
</div>
<div id="content">
<div class="sect1">
<h2 id="_synopsis">SYNOPSIS</h2>
<div class="sectionbody">
<div class="paragraph">
<p><strong>#include &lt;nanomsg/nn.h&gt;</strong></p>
</div>
<div class="paragraph">
<p><strong>int nn_connect (int <em>s</em>, const char <em>*addr</em>);</strong></p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_description">DESCRIPTION</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Adds a remote endpoint to the socket <em>s</em>. The library would then try to connect
to the specified remote endpoint.</p>
</div>
<div class="paragraph">
<p>The <em>addr</em> argument consists of two parts as follows: <em>transport</em><code>://</code><em>address</em>.
The <em>transport</em> specifies the underlying transport protocol to use. The meaning
of the <em>address</em> part is specific to the underlying transport protocol.</p>
</div>
<div class="paragraph">
<p>For the list of available transport protocols check the list on
<a href="nanomsg.html">nanomsg(7)</a> manual page.</p>
</div>
<div class="paragraph">
<p>Maximum length of the <em>addr</em> parameter is specified by <em>NN_SOCKADDR_MAX</em>
defined in <em>&lt;nanomsg/nn.h&gt;</em> header file.</p>
</div>
<div class="paragraph">
<p>Note that nn_connect and <a href="nn_bind.html">nn_bind(3)</a> may be called multiple times
on the same socket thus allowing the socket to communicate with multiple
heterogeneous endpoints.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_note">NOTE</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Unlike with traditional BSD sockets, this function operates asynchronously,
and returns to the caller before the operation is complete.
As a result, attempts to send data or receive data on the socket may not
succeed until the underlying transport actually establishes the connection.
Further, the connection may be lost, without any notification to the caller.
The library will attempt to reconnect automatically in such an event.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_return_value">RETURN VALUE</h2>
<div class="sectionbody">
<div class="paragraph">
<p>If the function succeeds positive endpoint ID is returned. Endpoint ID can be
later used to remove the endpoint from the socket via <a href="nn_shutdown.html">nn_shutdown(3)</a>
function.</p>
</div>
<div class="paragraph">
<p>If the function fails negative value is returned and <em>errno</em> is set to to one of
the values defined below.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_errors">ERRORS</h2>
<div class="sectionbody">
<div class="dlist">
<dl>
<dt class="hdlist1"><strong>EBADF</strong></dt>
<dd>
<p>The provided socket is invalid.</p>
</dd>
<dt class="hdlist1"><strong>EMFILE</strong></dt>
<dd>
<p>Maximum number of active endpoints was reached.</p>
</dd>
<dt class="hdlist1"><strong>EINVAL</strong></dt>
<dd>
<p>The syntax of the supplied address is invalid.</p>
</dd>
<dt class="hdlist1"><strong>ENAMETOOLONG</strong></dt>
<dd>
<p>The supplied address is too long.</p>
</dd>
<dt class="hdlist1"><strong>EPROTONOSUPPORT</strong></dt>
<dd>
<p>The requested transport protocol is not supported.</p>
</dd>
<dt class="hdlist1"><strong>ENODEV</strong></dt>
<dd>
<p>Address specifies a nonexistent interface.</p>
</dd>
<dt class="hdlist1"><strong>ETERM</strong></dt>
<dd>
<p>The library is terminating.</p>
</dd>
</dl>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_example">EXAMPLE</h2>
<div class="sectionbody">
<div class="listingblock">
<div class="content">
<pre>s = nn_socket (AF_SP, NN_PUB);
eid1 = nn_connect (s, "ipc:///tmp/test.ipc");
eid2 = nn_connect (s, "tcp://server001:5560");</pre>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_see_also">SEE ALSO</h2>
<div class="sectionbody">
<div class="paragraph">
<p><a href="nn_inproc.html">nn_inproc(7)</a>
<a href="nn_ipc.html">nn_ipc(7)</a>
<a href="nn_tcp.html">nn_tcp(7)</a>
<a href="nn_socket.html">nn_socket(3)</a>
<a href="nn_bind.html">nn_bind(3)</a>
<a href="nn_shutdown.html">nn_shutdown(3)</a>
<a href="nanomsg.html">nanomsg(7)</a></p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_authors">AUTHORS</h2>
<div class="sectionbody">
<div class="paragraph">
<p><a href="mailto:sustrik@250bpm.com">Martin Sustrik</a>
<a href="mailto:garrett@damore.org">Garrett D&#8217;Amore</a></p>
</div>
</div>
</div>
</div>
<div id="footer">
<div id="footer-text">
nanomsg 1.1.2<br>
Last updated 2017-11-07 00:41:50 UTC
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