108 lines
7.7 KiB
HTML
108 lines
7.7 KiB
HTML
|
<html>
|
||
|
|
<head>
|
||
|
|
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
|
||
|
|
<title>connect (5 of 12 overloads)</title>
|
||
|
|
<link rel="stylesheet" href="../../../boostbook.css" type="text/css">
|
||
|
|
<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
|
||
|
|
<link rel="home" href="../../../index.html" title="Asio">
|
||
|
|
<link rel="up" href="../connect.html" title="connect">
|
||
|
|
<link rel="prev" href="overload4.html" title="connect (4 of 12 overloads)">
|
||
|
|
<link rel="next" href="overload6.html" title="connect (6 of 12 overloads)">
|
||
|
|
<meta name="viewport" content="width=device-width, initial-scale=1">
|
||
|
|
</head>
|
||
|
|
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
|
||
|
|
<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../../asio.png"></td></tr></table>
|
||
|
|
<hr>
|
||
|
|
<div class="spirit-nav">
|
||
|
|
<a accesskey="p" href="overload4.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../connect.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="overload6.html"><img src="../../../next.png" alt="Next"></a>
|
||
|
|
</div>
|
||
|
|
<div class="section">
|
||
|
|
<div class="titlepage"><div><div><h4 class="title">
|
||
|
|
<a name="asio.reference.connect.overload5"></a><a class="link" href="overload5.html" title="connect (5 of 12 overloads)">connect (5 of 12
|
||
|
|
overloads)</a>
|
||
|
|
</h4></div></div></div>
|
||
|
|
<p>
|
||
|
|
Establishes a socket connection by trying each endpoint in a sequence.
|
||
|
|
</p>
|
||
|
|
<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span>
|
||
|
|
<span class="keyword">typename</span> <a class="link" href="../Protocol.html" title="Protocol requirements">Protocol</a><span class="special">,</span>
|
||
|
|
<span class="keyword">typename</span> <a class="link" href="../Executor1.html" title="Executor requirements">Executor</a><span class="special">,</span>
|
||
|
|
<span class="keyword">typename</span> <span class="identifier">Iterator</span><span class="special">></span>
|
||
|
|
<span class="identifier">Iterator</span> <span class="identifier">connect</span><span class="special">(</span>
|
||
|
|
<span class="identifier">basic_socket</span><span class="special"><</span> <span class="identifier">Protocol</span><span class="special">,</span> <span class="identifier">Executor</span> <span class="special">></span> <span class="special">&</span> <span class="identifier">s</span><span class="special">,</span>
|
||
|
|
<span class="identifier">Iterator</span> <span class="identifier">begin</span><span class="special">,</span>
|
||
|
|
<span class="identifier">Iterator</span> <span class="identifier">end</span><span class="special">);</span>
|
||
|
|
</pre>
|
||
|
|
<p>
|
||
|
|
This function attempts to connect a socket to one of a sequence of endpoints.
|
||
|
|
It does this by repeated calls to the socket's <code class="computeroutput"><span class="identifier">connect</span></code>
|
||
|
|
member function, once for each endpoint in the sequence, until a connection
|
||
|
|
is successfully established.
|
||
|
|
</p>
|
||
|
|
<h6>
|
||
|
|
<a name="asio.reference.connect.overload5.h0"></a>
|
||
|
|
<span><a name="asio.reference.connect.overload5.parameters"></a></span><a class="link" href="overload5.html#asio.reference.connect.overload5.parameters">Parameters</a>
|
||
|
|
</h6>
|
||
|
|
<div class="variablelist">
|
||
|
|
<p class="title"><b></b></p>
|
||
|
|
<dl>
|
||
|
|
<dt><span class="term">s</span></dt>
|
||
|
|
<dd><p>
|
||
|
|
The socket to be connected. If the socket is already open, it will
|
||
|
|
be closed.
|
||
|
|
</p></dd>
|
||
|
|
<dt><span class="term">begin</span></dt>
|
||
|
|
<dd><p>
|
||
|
|
An iterator pointing to the start of a sequence of endpoints.
|
||
|
|
</p></dd>
|
||
|
|
<dt><span class="term">end</span></dt>
|
||
|
|
<dd><p>
|
||
|
|
An iterator pointing to the end of a sequence of endpoints.
|
||
|
|
</p></dd>
|
||
|
|
</dl>
|
||
|
|
</div>
|
||
|
|
<h6>
|
||
|
|
<a name="asio.reference.connect.overload5.h1"></a>
|
||
|
|
<span><a name="asio.reference.connect.overload5.return_value"></a></span><a class="link" href="overload5.html#asio.reference.connect.overload5.return_value">Return
|
||
|
|
Value</a>
|
||
|
|
</h6>
|
||
|
|
<p>
|
||
|
|
An iterator denoting the successfully connected endpoint.
|
||
|
|
</p>
|
||
|
|
<h6>
|
||
|
|
<a name="asio.reference.connect.overload5.h2"></a>
|
||
|
|
<span><a name="asio.reference.connect.overload5.exceptions"></a></span><a class="link" href="overload5.html#asio.reference.connect.overload5.exceptions">Exceptions</a>
|
||
|
|
</h6>
|
||
|
|
<div class="variablelist">
|
||
|
|
<p class="title"><b></b></p>
|
||
|
|
<dl>
|
||
|
|
<dt><span class="term">asio::system_error</span></dt>
|
||
|
|
<dd><p>
|
||
|
|
Thrown on failure. If the sequence is empty, the associated <code class="computeroutput"><span class="identifier">error_code</span></code> is <code class="computeroutput"><span class="identifier">asio</span><span class="special">::</span><span class="identifier">error</span><span class="special">::</span><span class="identifier">not_found</span></code>.
|
||
|
|
Otherwise, contains the error from the last connection attempt.
|
||
|
|
</p></dd>
|
||
|
|
</dl>
|
||
|
|
</div>
|
||
|
|
<h6>
|
||
|
|
<a name="asio.reference.connect.overload5.h3"></a>
|
||
|
|
<span><a name="asio.reference.connect.overload5.example"></a></span><a class="link" href="overload5.html#asio.reference.connect.overload5.example">Example</a>
|
||
|
|
</h6>
|
||
|
|
<pre class="programlisting"><span class="identifier">tcp</span><span class="special">::</span><span class="identifier">resolver</span> <span class="identifier">r</span><span class="special">(</span><span class="identifier">my_context</span><span class="special">);</span>
|
||
|
|
<span class="identifier">tcp</span><span class="special">::</span><span class="identifier">resolver</span><span class="special">::</span><span class="identifier">query</span> <span class="identifier">q</span><span class="special">(</span><span class="string">"host"</span><span class="special">,</span> <span class="string">"service"</span><span class="special">);</span>
|
||
|
|
<span class="identifier">tcp</span><span class="special">::</span><span class="identifier">resolver</span><span class="special">::</span><span class="identifier">results_type</span> <span class="identifier">e</span> <span class="special">=</span> <span class="identifier">r</span><span class="special">.</span><span class="identifier">resolve</span><span class="special">(</span><span class="identifier">q</span><span class="special">);</span>
|
||
|
|
<span class="identifier">tcp</span><span class="special">::</span><span class="identifier">socket</span> <span class="identifier">s</span><span class="special">(</span><span class="identifier">my_context</span><span class="special">);</span>
|
||
|
|
<span class="identifier">asio</span><span class="special">::</span><span class="identifier">connect</span><span class="special">(</span><span class="identifier">s</span><span class="special">,</span> <span class="identifier">e</span><span class="special">.</span><span class="identifier">begin</span><span class="special">(),</span> <span class="identifier">e</span><span class="special">.</span><span class="identifier">end</span><span class="special">());</span>
|
||
|
|
</pre>
|
||
|
|
</div>
|
||
|
|
<div class="copyright-footer">Copyright © 2003-2023 Christopher M. Kohlhoff<p>
|
||
|
|
Distributed under the Boost Software License, Version 1.0. (See accompanying
|
||
|
|
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
|
||
|
|
</p>
|
||
|
|
</div>
|
||
|
|
<hr>
|
||
|
|
<div class="spirit-nav">
|
||
|
|
<a accesskey="p" href="overload4.html"><img src="../../../prev.png" alt="Prev"></a><a accesskey="u" href="../connect.html"><img src="../../../up.png" alt="Up"></a><a accesskey="h" href="../../../index.html"><img src="../../../home.png" alt="Home"></a><a accesskey="n" href="overload6.html"><img src="../../../next.png" alt="Next"></a>
|
||
|
|
</div>
|
||
|
|
</body>
|
||
|
|
</html>
|