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425 lines
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<title>ip::basic_resolver</title>
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<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="asio C++ library" width="250" height="60" src="../../asio.png"></td></tr></table>
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<div class="section">
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<div class="titlepage"><div><div><h3 class="title">
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<a name="asio.reference.ip__basic_resolver"></a><a class="link" href="ip__basic_resolver.html" title="ip::basic_resolver">ip::basic_resolver</a>
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</h3></div></div></div>
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<p>
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<a class="indexterm" name="asio.indexterm.ip__basic_resolver"></a>
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</p>
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<p>
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Provides endpoint resolution functionality.
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</p>
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<pre class="programlisting"><span class="keyword">template</span><span class="special"><</span>
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<span class="keyword">typename</span> <a class="link" href="InternetProtocol.html" title="Internet protocol requirements">InternetProtocol</a><span class="special">,</span>
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<span class="keyword">typename</span> <a class="link" href="Executor1.html" title="Executor requirements">Executor</a><span class="special">></span>
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<span class="keyword">class</span> <span class="identifier">basic_resolver</span> <span class="special">:</span>
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<span class="keyword">public</span> <span class="identifier">ip</span><span class="special">::</span><span class="identifier">resolver_base</span>
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</pre>
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<h5>
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<a name="asio.reference.ip__basic_resolver.h0"></a>
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<span><a name="asio.reference.ip__basic_resolver.types"></a></span><a class="link" href="ip__basic_resolver.html#asio.reference.ip__basic_resolver.types">Types</a>
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</h5>
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<div class="informaltable"><table class="table">
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<colgroup>
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<col>
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<col>
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</colgroup>
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<thead><tr>
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<th>
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<p>
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Name
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</p>
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</th>
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<th>
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<p>
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Description
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</p>
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</th>
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</tr></thead>
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<tbody>
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<tr>
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<td>
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<p>
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<a class="link" href="ip__basic_resolver__rebind_executor.html" title="ip::basic_resolver::rebind_executor"><span class="bold"><strong>rebind_executor</strong></span></a>
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</p>
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</td>
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<td>
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<p>
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Rebinds the resolver type to another executor.
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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<a class="link" href="ip__basic_resolver/endpoint_type.html" title="ip::basic_resolver::endpoint_type"><span class="bold"><strong>endpoint_type</strong></span></a>
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</p>
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</td>
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<td>
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<p>
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The endpoint type.
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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<a class="link" href="ip__basic_resolver/executor_type.html" title="ip::basic_resolver::executor_type"><span class="bold"><strong>executor_type</strong></span></a>
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</p>
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</td>
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<td>
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<p>
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The type of the executor associated with the object.
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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<a class="link" href="ip__basic_resolver/flags.html" title="ip::basic_resolver::flags"><span class="bold"><strong>flags</strong></span></a>
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</p>
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</td>
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<td>
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<p>
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A bitmask type (C++ Std [lib.bitmask.types]).
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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<a class="link" href="ip__basic_resolver/iterator.html" title="ip::basic_resolver::iterator"><span class="bold"><strong>iterator</strong></span></a>
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</p>
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</td>
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<td>
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<p>
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(Deprecated.) The iterator type.
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</p>
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</td>
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</tr>
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<td>
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<p>
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<a class="link" href="ip__basic_resolver/protocol_type.html" title="ip::basic_resolver::protocol_type"><span class="bold"><strong>protocol_type</strong></span></a>
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</p>
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</td>
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<td>
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<p>
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The protocol type.
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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<a class="link" href="ip__basic_resolver/query.html" title="ip::basic_resolver::query"><span class="bold"><strong>query</strong></span></a>
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</p>
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</td>
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<td>
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<p>
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(Deprecated.) The query type.
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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<a class="link" href="ip__basic_resolver/results_type.html" title="ip::basic_resolver::results_type"><span class="bold"><strong>results_type</strong></span></a>
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</p>
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</td>
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<td>
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<p>
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The results type.
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</p>
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</td>
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</tr>
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</tbody>
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</table></div>
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<h5>
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<a name="asio.reference.ip__basic_resolver.h1"></a>
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<span><a name="asio.reference.ip__basic_resolver.member_functions"></a></span><a class="link" href="ip__basic_resolver.html#asio.reference.ip__basic_resolver.member_functions">Member
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Functions</a>
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</h5>
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<div class="informaltable"><table class="table">
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<colgroup>
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<col>
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<col>
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</colgroup>
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<thead><tr>
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<th>
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<p>
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Name
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</p>
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</th>
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<th>
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<p>
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Description
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</p>
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</th>
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</tr></thead>
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<tbody>
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<tr>
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<td>
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<p>
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<a class="link" href="ip__basic_resolver/async_resolve.html" title="ip::basic_resolver::async_resolve"><span class="bold"><strong>async_resolve</strong></span></a>
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</p>
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</td>
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<td>
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<p>
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(Deprecated: Use overload with separate host and service parameters.)
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Asynchronously perform forward resolution of a query to a list
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of entries. <br> <span class="silver"> —</span><br> Asynchronously perform forward resolution
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of a query to a list of entries. <br> <span class="silver"> —</span><br> Asynchronously perform
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reverse resolution of an endpoint to a list of entries.
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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<a class="link" href="ip__basic_resolver/basic_resolver.html" title="ip::basic_resolver::basic_resolver"><span class="bold"><strong>basic_resolver</strong></span></a> <span class="silver">[constructor]</span>
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</p>
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</td>
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<td>
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<p>
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Construct with executor. <br> <span class="silver"> —</span><br> Construct with execution
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context. <br> <span class="silver"> —</span><br> Move-construct a basic_resolver from another.
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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<a class="link" href="ip__basic_resolver/cancel.html" title="ip::basic_resolver::cancel"><span class="bold"><strong>cancel</strong></span></a>
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</p>
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</td>
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<td>
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<p>
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Cancel any asynchronous operations that are waiting on the resolver.
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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<a class="link" href="ip__basic_resolver/get_executor.html" title="ip::basic_resolver::get_executor"><span class="bold"><strong>get_executor</strong></span></a>
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</p>
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</td>
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<td>
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<p>
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Get the executor associated with the object.
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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<a class="link" href="ip__basic_resolver/operator_eq_.html" title="ip::basic_resolver::operator="><span class="bold"><strong>operator=</strong></span></a>
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</p>
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</td>
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<td>
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<p>
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Move-assign a basic_resolver from another.
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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<a class="link" href="ip__basic_resolver/resolve.html" title="ip::basic_resolver::resolve"><span class="bold"><strong>resolve</strong></span></a>
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</p>
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</td>
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<td>
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<p>
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(Deprecated: Use overload with separate host and service parameters.)
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Perform forward resolution of a query to a list of entries. <br>
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<span class="silver"> —</span><br> Perform forward resolution of a query to a list of entries.
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<br> <span class="silver"> —</span><br> Perform reverse resolution of an endpoint to a list
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of entries.
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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<a class="link" href="ip__basic_resolver/_basic_resolver.html" title="ip::basic_resolver::~basic_resolver"><span class="bold"><strong>~basic_resolver</strong></span></a> <span class="silver">[destructor]</span>
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</p>
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</td>
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<td>
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<p>
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Destroys the resolver.
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</p>
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</td>
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</tr>
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</tbody>
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</table></div>
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<h5>
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<a name="asio.reference.ip__basic_resolver.h2"></a>
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<span><a name="asio.reference.ip__basic_resolver.data_members"></a></span><a class="link" href="ip__basic_resolver.html#asio.reference.ip__basic_resolver.data_members">Data
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Members</a>
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</h5>
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<div class="informaltable"><table class="table">
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<colgroup>
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<col>
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<col>
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</colgroup>
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<thead><tr>
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<th>
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<p>
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Name
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</p>
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</th>
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<th>
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<p>
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Description
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</p>
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</th>
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</tr></thead>
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<tbody>
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<tr>
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<td>
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<p>
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<a class="link" href="ip__basic_resolver/address_configured.html" title="ip::basic_resolver::address_configured"><span class="bold"><strong>address_configured</strong></span></a> <span class="silver">[static]</span>
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</p>
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</td>
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<td>
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<p>
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Only return IPv4 addresses if a non-loopback IPv4 address is configured
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for the system. Only return IPv6 addresses if a non-loopback IPv6
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address is configured for the system.
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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<a class="link" href="ip__basic_resolver/all_matching.html" title="ip::basic_resolver::all_matching"><span class="bold"><strong>all_matching</strong></span></a> <span class="silver">[static]</span>
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</p>
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</td>
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<td>
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<p>
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If used with v4_mapped, return all matching IPv6 and IPv4 addresses.
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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<a class="link" href="ip__basic_resolver/canonical_name.html" title="ip::basic_resolver::canonical_name"><span class="bold"><strong>canonical_name</strong></span></a> <span class="silver">[static]</span>
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</p>
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</td>
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<td>
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<p>
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Determine the canonical name of the host specified in the query.
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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<a class="link" href="ip__basic_resolver/numeric_host.html" title="ip::basic_resolver::numeric_host"><span class="bold"><strong>numeric_host</strong></span></a> <span class="silver">[static]</span>
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</p>
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</td>
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<td>
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<p>
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Host name should be treated as a numeric string defining an IPv4
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or IPv6 address and no name resolution should be attempted.
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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<a class="link" href="ip__basic_resolver/numeric_service.html" title="ip::basic_resolver::numeric_service"><span class="bold"><strong>numeric_service</strong></span></a> <span class="silver">[static]</span>
|
||
|
|
</p>
|
||
|
|
</td>
|
||
|
|
<td>
|
||
|
|
<p>
|
||
|
|
Service name should be treated as a numeric string defining a port
|
||
|
|
number and no name resolution should be attempted.
|
||
|
|
</p>
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
<tr>
|
||
|
|
<td>
|
||
|
|
<p>
|
||
|
|
<a class="link" href="ip__basic_resolver/passive.html" title="ip::basic_resolver::passive"><span class="bold"><strong>passive</strong></span></a> <span class="silver">[static]</span>
|
||
|
|
</p>
|
||
|
|
</td>
|
||
|
|
<td>
|
||
|
|
<p>
|
||
|
|
Indicate that returned endpoint is intended for use as a locally
|
||
|
|
bound socket endpoint.
|
||
|
|
</p>
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
<tr>
|
||
|
|
<td>
|
||
|
|
<p>
|
||
|
|
<a class="link" href="ip__basic_resolver/v4_mapped.html" title="ip::basic_resolver::v4_mapped"><span class="bold"><strong>v4_mapped</strong></span></a> <span class="silver">[static]</span>
|
||
|
|
</p>
|
||
|
|
</td>
|
||
|
|
<td>
|
||
|
|
<p>
|
||
|
|
If the query protocol family is specified as IPv6, return IPv4-mapped
|
||
|
|
IPv6 addresses on finding no IPv6 addresses.
|
||
|
|
</p>
|
||
|
|
</td>
|
||
|
|
</tr>
|
||
|
|
</tbody>
|
||
|
|
</table></div>
|
||
|
|
<p>
|
||
|
|
The <a class="link" href="ip__basic_resolver.html" title="ip::basic_resolver"><code class="computeroutput"><span class="identifier">ip</span><span class="special">::</span><span class="identifier">basic_resolver</span></code></a>
|
||
|
|
class template provides the ability to resolve a query to a list of endpoints.
|
||
|
|
</p>
|
||
|
|
<h5>
|
||
|
|
<a name="asio.reference.ip__basic_resolver.h3"></a>
|
||
|
|
<span><a name="asio.reference.ip__basic_resolver.thread_safety"></a></span><a class="link" href="ip__basic_resolver.html#asio.reference.ip__basic_resolver.thread_safety">Thread
|
||
|
|
Safety</a>
|
||
|
|
</h5>
|
||
|
|
<p>
|
||
|
|
<span class="emphasis"><em>Distinct</em></span> <span class="emphasis"><em>objects:</em></span> Safe.
|
||
|
|
</p>
|
||
|
|
<p>
|
||
|
|
<span class="emphasis"><em>Shared</em></span> <span class="emphasis"><em>objects:</em></span> Unsafe.
|
||
|
|
</p>
|
||
|
|
<h5>
|
||
|
|
<a name="asio.reference.ip__basic_resolver.h4"></a>
|
||
|
|
<span><a name="asio.reference.ip__basic_resolver.requirements"></a></span><a class="link" href="ip__basic_resolver.html#asio.reference.ip__basic_resolver.requirements">Requirements</a>
|
||
|
|
</h5>
|
||
|
|
<p>
|
||
|
|
<span class="emphasis"><em>Header: </em></span><code class="literal">asio/ip/basic_resolver.hpp</code>
|
||
|
|
</p>
|
||
|
|
<p>
|
||
|
|
<span class="emphasis"><em>Convenience header: </em></span><code class="literal">asio.hpp</code>
|
||
|
|
</p>
|
||
|
|
</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>
|
||
|
|
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