<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>Raw socket service requirements</title>
<link rel="stylesheet" href="../../boostbook.css" type="text/css">
<meta name="generator" content="DocBook XSL Stylesheets V1.73.2">
<link rel="start" href="../../index.html" title="Asio">
<link rel="up" href="../reference.html" title="Reference">
<link rel="prev" href="RandomAccessHandleService.html" title="Random access handle service requirements">
<link rel="next" href="ReadHandler.html" title="Read handler requirements">
</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="RandomAccessHandleService.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.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="ReadHandler.html"><img src="../../next.png" alt="Next"></a>
</div>
<div class="section" lang="en">
<div class="titlepage"><div><div><h3 class="title">
<a name="asio.reference.RawSocketService"></a><a class="link" href="RawSocketService.html" title="Raw socket service requirements">Raw socket service requirements</a>
</h3></div></div></div>
<p>
A raw socket service must meet the requirements for a <a class="link" href="SocketService.html" title="Socket service requirements">socket
service</a>, as well as the additional requirements listed below.
</p>
<p>
In the table below, <code class="computeroutput"><span class="identifier">X</span></code> denotes
a raw socket service class for protocol <a class="link" href="Protocol.html" title="Protocol requirements"><code class="computeroutput"><span class="identifier">Protocol</span></code></a>, <code class="computeroutput"><span class="identifier">a</span></code>
denotes a value of type <code class="computeroutput"><span class="identifier">X</span></code>,
<code class="computeroutput"><span class="identifier">b</span></code> denotes a value of type
<code class="computeroutput"><span class="identifier">X</span><span class="special">::</span><span class="identifier">implementation_type</span></code>, <code class="computeroutput"><span class="identifier">e</span></code>
denotes a value of type <code class="computeroutput"><span class="identifier">Protocol</span><span class="special">::</span><span class="identifier">endpoint</span></code>,
<code class="computeroutput"><span class="identifier">ec</span></code> denotes a value of type
<code class="computeroutput"><span class="identifier">error_code</span></code>, <code class="computeroutput"><span class="identifier">f</span></code> denotes a value of type <code class="computeroutput"><span class="identifier">socket_base</span><span class="special">::</span><span class="identifier">message_flags</span></code>, <code class="computeroutput"><span class="identifier">mb</span></code>
denotes a value satisfying <a class="link" href="MutableBufferSequence.html" title="Mutable buffer sequence requirements">mutable
buffer sequence</a> requirements, <code class="computeroutput"><span class="identifier">rh</span></code>
denotes a value meeting <a class="link" href="ReadHandler.html" title="Read handler requirements"><code class="computeroutput"><span class="identifier">ReadHandler</span></code></a> requirements, <code class="computeroutput"><span class="identifier">cb</span></code> denotes a value satisfying <a class="link" href="ConstBufferSequence.html" title="Constant buffer sequence requirements">constant
buffer sequence</a> requirements, and <code class="computeroutput"><span class="identifier">wh</span></code>
denotes a value meeting <a class="link" href="WriteHandler.html" title="Write handler requirements"><code class="computeroutput"><span class="identifier">WriteHandler</span></code></a> requirements.
</p>
<div class="table">
<a name="id696397"></a><p class="title"><b>Table 21. RawSocketService requirements</b></p>
<div class="table-contents"><table class="table" summary="RawSocketService requirements">
<colgroup>
<col>
<col>
<col>
</colgroup>
<thead><tr>
<th>
<p>
expression
</p>
</th>
<th>
<p>
return type
</p>
</th>
<th>
<p>
assertion/note\npre/post-condition
</p>
</th>
</tr></thead>
<tbody>
<tr>
<td>
<p>
<code class="computeroutput"><span class="identifier">a</span><span class="special">.</span><span class="identifier">receive</span><span class="special">(</span><span class="identifier">b</span><span class="special">,</span>
<span class="identifier">mb</span><span class="special">,</span>
<span class="identifier">f</span><span class="special">,</span>
<span class="identifier">ec</span><span class="special">);</span></code>
</p>
</td>
<td>
<p>
<code class="computeroutput"><span class="identifier">size_t</span></code>
</p>
</td>
<td>
<p>
pre: <code class="computeroutput"><span class="identifier">a</span><span class="special">.</span><span class="identifier">is_open</span><span class="special">(</span><span class="identifier">b</span><span class="special">)</span></code>.\n
\n Reads one or more bytes of data from a connected socket <code class="computeroutput"><span class="identifier">b</span></code>.\n \n The mutable buffer sequence
<code class="computeroutput"><span class="identifier">mb</span></code> specifies memory
where the data should be placed. The operation shall always fill
a buffer in the sequence completely before proceeding to the next.\n
\n If successful, returns the number of bytes read. Otherwise returns
<code class="computeroutput"><span class="number">0</span></code>.
</p>
</td>
</tr>
<tr>
<td>
<p>
<code class="computeroutput"><span class="identifier">a</span><span class="special">.</span><span class="identifier">async_receive</span><span class="special">(</span><span class="identifier">b</span><span class="special">,</span>
<span class="identifier">mb</span><span class="special">,</span>
<span class="identifier">f</span><span class="special">,</span>
<span class="identifier">rh</span><span class="special">);</span></code>
</p>
</td>
<td>
<p>
<code class="computeroutput"><span class="keyword">void</span></code>
</p>
</td>
<td>
<p>
pre: <code class="computeroutput"><span class="identifier">a</span><span class="special">.</span><span class="identifier">is_open</span><span class="special">(</span><span class="identifier">b</span><span class="special">)</span></code>.\n
\n Initiates an asynchronous operation to read one or more bytes
of data from a connected socket <code class="computeroutput"><span class="identifier">b</span></code>.
The operation is performed via the <code class="computeroutput"><span class="identifier">io_service</span></code>
object <code class="computeroutput"><span class="identifier">a</span><span class="special">.</span><span class="identifier">io_service</span><span class="special">()</span></code>
and behaves according to <a class="link" href="asynchronous_operations.html" title="Requirements on asynchronous operations">asynchronous
operation</a> requirements.\n \n The mutable buffer sequence
<code class="computeroutput"><span class="identifier">mb</span></code> specifies memory
where the data should be placed. The operation shall always fill
a buffer in the sequence completely before proceeding to the next.\n
\n The implementation shall maintain one or more copies of <code class="computeroutput"><span class="identifier">mb</span></code> until such time as the read
operation no longer requires access to the memory specified by
the buffers in the sequence. The program must ensure the memory
is valid until:\n \n — the last copy of <code class="computeroutput"><span class="identifier">mb</span></code>
is destroyed, or\n \n — the handler for the asynchronous operation
is invoked,\n \n whichever comes first.\n \n If the operation completes
successfully, the <code class="computeroutput"><span class="identifier">ReadHandler</span></code>
object <code class="computeroutput"><span class="identifier">rh</span></code> is invoked
with the number of bytes transferred. Otherwise it is invoked with
<code class="computeroutput"><span class="number">0</span></code>.
</p>
</td>
</tr>
<tr>
<td>
<p>
<code class="computeroutput"><span class="identifier">a</span><span class="special">.</span><span class="identifier">receive_from</span><span class="special">(</span><span class="identifier">b</span><span class="special">,</span>
<span class="identifier">mb</span><span class="special">,</span>
<span class="identifier">e</span><span class="special">,</span>
<span class="identifier">f</span><span class="special">,</span>
<span class="identifier">ec</span><span class="special">);</span></code>
</p>
</td>
<td>
<p>
<code class="computeroutput"><span class="identifier">size_t</span></code>
</p>
</td>
<td>
<p>
pre: <code class="computeroutput"><span class="identifier">a</span><span class="special">.</span><span class="identifier">is_open</span><span class="special">(</span><span class="identifier">b</span><span class="special">)</span></code>.\n
\n Reads one or more bytes of data from an unconnected socket
<code class="computeroutput"><span class="identifier">b</span></code>.\n \n The mutable
buffer sequence <code class="computeroutput"><span class="identifier">mb</span></code>
specifies memory where the data should be placed. The operation
shall always fill a buffer in the sequence completely before proceeding
to the next.\n \n If successful, returns the number of bytes read.
Otherwise returns <code class="computeroutput"><span class="number">0</span></code>.
</p>
</td>
</tr>
<tr>
<td>
<p>
<code class="computeroutput"><span class="identifier">a</span><span class="special">.</span><span class="identifier">async_receive_from</span><span class="special">(</span><span class="identifier">b</span><span class="special">,</span>
<span class="identifier">mb</span><span class="special">,</span>
<span class="identifier">e</span><span class="special">,</span>
<span class="identifier">f</span><span class="special">,</span>
<span class="identifier">rh</span><span class="special">);</span></code>
</p>
</td>
<td>
<p>
<code class="computeroutput"><span class="keyword">void</span></code>
</p>
</td>
<td>
<p>
pre: <code class="computeroutput"><span class="identifier">a</span><span class="special">.</span><span class="identifier">is_open</span><span class="special">(</span><span class="identifier">b</span><span class="special">)</span></code>.\n
\n Initiates an asynchronous operation to read one or more bytes
of data from an unconnected socket <code class="computeroutput"><span class="identifier">b</span></code>.
The operation is performed via the <code class="computeroutput"><span class="identifier">io_service</span></code>
object <code class="computeroutput"><span class="identifier">a</span><span class="special">.</span><span class="identifier">io_service</span><span class="special">()</span></code>
and behaves according to <a class="link" href="asynchronous_operations.html" title="Requirements on asynchronous operations">asynchronous
operation</a> requirements.\n \n The mutable buffer sequence
<code class="computeroutput"><span class="identifier">mb</span></code> specifies memory
where the data should be placed. The operation shall always fill
a buffer in the sequence completely before proceeding to the next.\n
\n The implementation shall maintain one or more copies of <code class="computeroutput"><span class="identifier">mb</span></code> until such time as the read
operation no longer requires access to the memory specified by
the buffers in the sequence. The program must ensure the memory
is valid until:\n \n — the last copy of <code class="computeroutput"><span class="identifier">mb</span></code>
is destroyed, or\n \n — the handler for the asynchronous operation
is invoked,\n \n whichever comes first.\n \n The program must ensure
the object <code class="computeroutput"><span class="identifier">e</span></code> is
valid until the handler for the asynchronous operation is invoked.\n
\n If the operation completes successfully, the <code class="computeroutput"><span class="identifier">ReadHandler</span></code>
object <code class="computeroutput"><span class="identifier">rh</span></code> is invoked
with the number of bytes transferred. Otherwise it is invoked with
<code class="computeroutput"><span class="number">0</span></code>.
</p>
</td>
</tr>
<tr>
<td>
<p>
<code class="computeroutput"><span class="identifier">a</span><span class="special">.</span><span class="identifier">send</span><span class="special">(</span><span class="identifier">b</span><span class="special">,</span>
<span class="identifier">cb</span><span class="special">,</span>
<span class="identifier">f</span><span class="special">,</span>
<span class="identifier">ec</span><span class="special">);</span></code>
</p>
</td>
<td>
<p>
<code class="computeroutput"><span class="identifier">size_t</span></code>
</p>
</td>
<td>
<p>
pre: <code class="computeroutput"><span class="identifier">a</span><span class="special">.</span><span class="identifier">is_open</span><span class="special">(</span><span class="identifier">b</span><span class="special">)</span></code>.\n
\n Writes one or more bytes of data to a connected socket <code class="computeroutput"><span class="identifier">b</span></code>.\n \n The constant buffer sequence
<code class="computeroutput"><span class="identifier">cb</span></code> specifies memory
where the data to be written is located. The operation shall always
write a buffer in the sequence completely before proceeding to
the next.\n \n If successful, returns the number of bytes written.
Otherwise returns <code class="computeroutput"><span class="number">0</span></code>.
</p>
</td>
</tr>
<tr>
<td>
<p>
<code class="computeroutput"><span class="identifier">a</span><span class="special">.</span><span class="identifier">async_send</span><span class="special">(</span><span class="identifier">b</span><span class="special">,</span>
<span class="identifier">cb</span><span class="special">,</span>
<span class="identifier">f</span><span class="special">,</span>
<span class="identifier">wh</span><span class="special">);</span></code>
</p>
</td>
<td>
<p>
<code class="computeroutput"><span class="keyword">void</span></code>
</p>
</td>
<td>
<p>
pre: <code class="computeroutput"><span class="identifier">a</span><span class="special">.</span><span class="identifier">is_open</span><span class="special">(</span><span class="identifier">b</span><span class="special">)</span></code>.\n
\n Initiates an asynchronous operation to write one or more bytes
of data to a connected socket <code class="computeroutput"><span class="identifier">b</span></code>.
The operation is performed via the <code class="computeroutput"><span class="identifier">io_service</span></code>
object <code class="computeroutput"><span class="identifier">a</span><span class="special">.</span><span class="identifier">io_service</span><span class="special">()</span></code>
and behaves according to <a class="link" href="asynchronous_operations.html" title="Requirements on asynchronous operations">asynchronous
operation</a> requirements.\n \n The constant buffer sequence
<code class="computeroutput"><span class="identifier">cb</span></code> specifies memory
where the data to be written is located. The operation shall always
write a buffer in the sequence completely before proceeding to
the next.\n \n The implementation shall maintain one or more copies
of <code class="computeroutput"><span class="identifier">cb</span></code> until such
time as the write operation no longer requires access to the memory
specified by the buffers in the sequence. The program must ensure
the memory is valid until:\n \n — the last copy of <code class="computeroutput"><span class="identifier">cb</span></code> is destroyed, or\n \n — the
handler for the asynchronous operation is invoked,\n \n whichever
comes first.\n \n If the operation completes successfully, the
<code class="computeroutput"><span class="identifier">WriteHandler</span></code> object
<code class="computeroutput"><span class="identifier">wh</span></code> is invoked with
the number of bytes transferred. Otherwise it is invoked with
<code class="computeroutput"><span class="number">0</span></code>.
</p>
</td>
</tr>
<tr>
<td>
<p>
</p>
<pre class="programlisting"><span class="keyword">const</span> <span class="keyword">typename</span> <span class="identifier">Protocol</span><span class="special">::</span><span class="identifier">endpoint</span><span class="special">&</span> <span class="identifier">u</span> <span class="special">=</span> <span class="identifier">e</span><span class="special">;</span>
<span class="identifier">a</span><span class="special">.</span><span class="identifier">send_to</span><span class="special">(</span><span class="identifier">b</span><span class="special">,</span> <span class="identifier">cb</span><span class="special">,</span> <span class="identifier">u</span><span class="special">,</span> <span class="identifier">f</span><span class="special">,</span> <span class="identifier">ec</span><span class="special">);</span>
</pre>
<p>
</p>
</td>
<td>
<p>
<code class="computeroutput"><span class="identifier">size_t</span></code>
</p>
</td>
<td>
<p>
pre: <code class="computeroutput"><span class="identifier">a</span><span class="special">.</span><span class="identifier">is_open</span><span class="special">(</span><span class="identifier">b</span><span class="special">)</span></code>.\n
\n Writes one or more bytes of data to an unconnected socket <code class="computeroutput"><span class="identifier">b</span></code>.\n \n The constant buffer sequence
<code class="computeroutput"><span class="identifier">cb</span></code> specifies memory
where the data to be written is located. The operation shall always
write a buffer in the sequence completely before proceeding to
the next.\n \n If successful, returns the number of bytes written.
Otherwise returns <code class="computeroutput"><span class="number">0</span></code>.
</p>
</td>
</tr>
<tr>
<td>
<p>
</p>
<pre class="programlisting"><span class="keyword">const</span> <span class="keyword">typename</span> <span class="identifier">Protocol</span><span class="special">::</span><span class="identifier">endpoint</span><span class="special">&</span> <span class="identifier">u</span> <span class="special">=</span> <span class="identifier">e</span><span class="special">;</span>
<span class="identifier">a</span><span class="special">.</span><span class="identifier">async_send</span><span class="special">(</span><span class="identifier">b</span><span class="special">,</span> <span class="identifier">cb</span><span class="special">,</span> <span class="identifier">u</span><span class="special">,</span> <span class="identifier">f</span><span class="special">,</span> <span class="identifier">wh</span><span class="special">);</span>
</pre>
<p>
</p>
</td>
<td>
<p>
<code class="computeroutput"><span class="keyword">void</span></code>
</p>
</td>
<td>
<p>
pre: <code class="computeroutput"><span class="identifier">a</span><span class="special">.</span><span class="identifier">is_open</span><span class="special">(</span><span class="identifier">b</span><span class="special">)</span></code>.\n
\n Initiates an asynchronous operation to write one or more bytes
of data to an unconnected socket <code class="computeroutput"><span class="identifier">b</span></code>.
The operation is performed via the <code class="computeroutput"><span class="identifier">io_service</span></code>
object <code class="computeroutput"><span class="identifier">a</span><span class="special">.</span><span class="identifier">io_service</span><span class="special">()</span></code>
and behaves according to <a class="link" href="asynchronous_operations.html" title="Requirements on asynchronous operations">asynchronous
operation</a> requirements.\n \n The constant buffer sequence
<code class="computeroutput"><span class="identifier">cb</span></code> specifies memory
where the data to be written is located. The operation shall always
write a buffer in the sequence completely before proceeding to
the next.\n \n The implementation shall maintain one or more copies
of <code class="computeroutput"><span class="identifier">cb</span></code> until such
time as the write operation no longer requires access to the memory
specified by the buffers in the sequence. The program must ensure
the memory is valid until:\n \n — the last copy of <code class="computeroutput"><span class="identifier">cb</span></code> is destroyed, or\n \n — the
handler for the asynchronous operation is invoked,\n \n whichever
comes first.\n \n If the operation completes successfully, the
<code class="computeroutput"><span class="identifier">WriteHandler</span></code> object
<code class="computeroutput"><span class="identifier">wh</span></code> is invoked with
the number of bytes transferred. Otherwise it is invoked with
<code class="computeroutput"><span class="number">0</span></code>.
</p>
</td>
</tr>
</tbody>
</table></div>
</div>
<br class="table-break">
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright © 2003 - 2010 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></td>
</tr></table>
<hr>
<div class="spirit-nav">
<a accesskey="p" href="RandomAccessHandleService.html"><img src="../../prev.png" alt="Prev"></a><a accesskey="u" href="../reference.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="ReadHandler.html"><img src="../../next.png" alt="Next"></a>
</div>
</body>
</html>
