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<title>Internet protocol requirements</title>
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<div class="titlepage"><div><div><h3 class="title">
<a name="asio.reference.InternetProtocol"></a><a class="link" href="InternetProtocol.html" title="Internet protocol requirements">Internet protocol requirements</a>
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<p>
        An internet protocol must meet the requirements for a <a class="link" href="Protocol.html" title="Protocol requirements">protocol</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
        an internet protocol class, <code class="computeroutput"><span class="identifier">a</span></code>
        denotes a value of type <code class="computeroutput"><span class="identifier">X</span></code>,
        and <code class="computeroutput"><span class="identifier">b</span></code> denotes a value of
        type <code class="computeroutput"><span class="identifier">X</span></code>.
      </p>
<div class="table">
<a name="asio.reference.InternetProtocol.t0"></a><p class="title"><b>Table&#160;15.&#160;InternetProtocol requirements</b></p>
<div class="table-contents"><table class="table" summary="InternetProtocol requirements">
<colgroup>
<col>
<col>
<col>
</colgroup>
<thead><tr>
<th>
                <p>
                  expression
                </p>
              </th>
<th>
                <p>
                  return type
                </p>
              </th>
<th>
                <p>
                  assertion/note<br> pre/post-conditions
                </p>
              </th>
</tr></thead>
<tbody>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">X</span><span class="special">::</span><span class="identifier">resolver</span></code>
                </p>
              </td>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">ip</span><span class="special">::</span><span class="identifier">basic_resolver</span><span class="special">&lt;</span><span class="identifier">X</span><span class="special">&gt;</span></code>
                </p>
              </td>
<td>
                <p>
                  The type of a resolver for the protocol.
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">X</span><span class="special">::</span><span class="identifier">v4</span><span class="special">()</span></code>
                </p>
              </td>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">X</span></code>
                </p>
              </td>
<td>
                <p>
                  Returns an object representing the IP version 4 protocol.
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">X</span><span class="special">::</span><span class="identifier">v6</span><span class="special">()</span></code>
                </p>
              </td>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">X</span></code>
                </p>
              </td>
<td>
                <p>
                  Returns an object representing the IP version 6 protocol.
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">a</span> <span class="special">==</span>
                  <span class="identifier">b</span></code>
                </p>
              </td>
<td>
                <p>
                  convertible to <code class="computeroutput"><span class="keyword">bool</span></code>
                </p>
              </td>
<td>
                <p>
                  Returns whether two protocol objects are equal.
                </p>
              </td>
</tr>
<tr>
<td>
                <p>
                  <code class="computeroutput"><span class="identifier">a</span> <span class="special">!=</span>
                  <span class="identifier">b</span></code>
                </p>
              </td>
<td>
                <p>
                  convertible to <code class="computeroutput"><span class="keyword">bool</span></code>
                </p>
              </td>
<td>
                <p>
                  Returns <code class="computeroutput"><span class="special">!(</span><span class="identifier">a</span>
                  <span class="special">==</span> <span class="identifier">b</span><span class="special">)</span></code>.
                </p>
              </td>
</tr>
</tbody>
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<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2014 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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