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<div class="titlepage"><div><div><h5 class="title">
<a name="asio.reference.basic_raw_socket.async_receive_from.overload2"></a><a class="link" href="overload2.html" title="basic_raw_socket::async_receive_from (2 of 2 overloads)">basic_raw_socket::async_receive_from
(2 of 2 overloads)</a>
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<p>
Start an asynchronous receive.
</p>
<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span>
<span class="keyword">typename</span> <a class="link" href="../../MutableBufferSequence.html" title="Mutable buffer sequence requirements">MutableBufferSequence</a><span class="special">,</span>
<span class="keyword">typename</span> <a class="link" href="../../ReadHandler.html" title="Read handler requirements">ReadHandler</a><span class="special">></span>
<span class="keyword">void</span> <span class="identifier">async_receive_from</span><span class="special">(</span>
<span class="keyword">const</span> <span class="identifier">MutableBufferSequence</span> <span class="special">&</span> <span class="identifier">buffers</span><span class="special">,</span>
<span class="identifier">endpoint_type</span> <span class="special">&</span> <span class="identifier">sender_endpoint</span><span class="special">,</span>
<span class="identifier">socket_base</span><span class="special">::</span><span class="identifier">message_flags</span> <span class="identifier">flags</span><span class="special">,</span>
<span class="identifier">ReadHandler</span> <span class="identifier">handler</span><span class="special">);</span>
</pre>
<p>
This function is used to asynchronously receive raw data. The function
call always returns immediately.
</p>
<a name="asio.reference.basic_raw_socket.async_receive_from.overload2.parameters"></a><h6>
<a name="id792347"></a>
<a class="link" href="overload2.html#asio.reference.basic_raw_socket.async_receive_from.overload2.parameters">Parameters</a>
</h6>
<div class="variablelist">
<p class="title"><b></b></p>
<dl>
<dt><span class="term">buffers</span></dt>
<dd><p>
One or more buffers into which the data will be received. Although
the buffers object may be copied as necessary, ownership of the
underlying memory blocks is retained by the caller, which must
guarantee that they remain valid until the handler is called.
</p></dd>
<dt><span class="term">sender_endpoint</span></dt>
<dd><p>
An endpoint object that receives the endpoint of the remote sender
of the data. Ownership of the sender_endpoint object is retained
by the caller, which must guarantee that it is valid until the
handler is called.
</p></dd>
<dt><span class="term">flags</span></dt>
<dd><p>
Flags specifying how the receive call is to be made.
</p></dd>
<dt><span class="term">handler</span></dt>
<dd>
<p>
The handler to be called when the receive operation completes.
Copies will be made of the handler as required. The function signature
of the handler must be:
</p>
<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">handler</span><span class="special">(</span>
<span class="keyword">const</span> <span class="identifier">asio</span><span class="special">::</span><span class="identifier">error_code</span><span class="special">&</span> <span class="identifier">error</span><span class="special">,</span> <span class="comment">// Result of operation.
</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span> <span class="identifier">bytes_transferred</span> <span class="comment">// Number of bytes received.
</span><span class="special">);</span>
</pre>
<p>
Regardless of whether the asynchronous operation completes immediately
or not, the handler will not be invoked from within this function.
Invocation of the handler will be performed in a manner equivalent
to using <code class="computeroutput"><span class="identifier">asio</span><span class="special">::</span><span class="identifier">io_service</span><span class="special">::</span><span class="identifier">post</span><span class="special">()</span></code>.
</p>
</dd>
</dl>
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<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>)
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