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<head><title>dkim_libfeature()</title></head>
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<h1>dkim_libfeature()</h1>
<p align="right"><a href="index.html">[back to index]</a></p>
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<!---------- Synopsis ----------->
<tr><th valign="top" align=left width=150>SYNOPSIS</th><td>
<pre>
#include <dkim.h>
_Bool dkim_libfeature(
<a href="dkim_lib.html"><tt>DKIM_LIB</tt></a> *lib,
u_int fc
);
</pre>
Tests for availability of a specific feature in the library.
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<!----------- Description ---------->
<tr><th valign="top" align=left>DESCRIPTION</th><td>
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<th width="80">Called When</th>
<td><tt>dkim_libfeature()</tt> can be called at any time after acquiring
a library handle from
<a href="dkim_init.html"><tt>dkim_init()</tt></a>.</td>
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<!----------- Arguments ---------->
<tr><th valign="top" align=left>ARGUMENTS</th><td>
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<tr bgcolor="#dddddd"><th>Argument</th><th>Description</th></tr>
<tr valign="top"><td>dkim</td>
<td>Library instance handle, returned by
<a href="dkim_init.html"><tt>dkim_init</tt></a>.
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<tr valign="top"><td>fc</td>
<td>A code representing a specific feature of the library. Possible
values:
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<tr bgcolor="#dddddd"><th>Feature Name</th><th>Description</th></tr>
<tr valign="top"><td><tt>DKIM_FEATURE_DIFFHEADERS</tt></td>
<td>Underlying code required to provide the
<a href="dkim_diffheaders.html"><tt>dkim_diffheaders()</tt></a>
facility. </td> </tr>
<tr valign="top"><td><tt>DKIM_FEATURE_DKIM_REPUTATION</tt></td>
<td>Underlying code required to provide the
<a href="dkim_get_reputation.html"><tt>dkim_get_reputation()</tt></a>
facility. </td> </tr>
<tr valign="top"><td><tt>DKIM_FEATURE_PARSE_TIME</tt></td>
<td>Underlying code required to provide the
<a href="dkim_get_msgdate.html"><tt>dkim_get_msgdate()</tt></a>
facility. </td> </tr>
<tr valign="top"><td><tt>DKIM_FEATURE_QUERY_CACHE</tt></td>
<td>Underlying code required to do local caching
of DNS replies (i.e. key and policy records).
</td> </tr>
<tr valign="top"><td><tt>DKIM_FEATURE_SHA256</tt></td>
<td>Underlying code required to do SHA256 hashing
when signing or verifying. </td> </tr>
<tr valign="top"><td><tt>DKIM_FEATURE_DNSSEC</tt></td>
<td>Underlying code required to conduct DNSSEC
evaluation of replies. </td> </tr>
<tr valign="top"><td><tt>DKIM_FEATURE_OVERSIGN</tt></td>
<td>Capability to "over-sign" header fields
to prevent later addition of signed
fields. </td> </tr>
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<!----------- Notes ---------->
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<th valign="top" align=left>NOTES</th>
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<ul>
<li>None.
</ul>
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<hr size="1">
<font size="-1">
Copyright (c) 2005-2008 Sendmail, Inc. and its suppliers.
All rights reserved.
<br>
Copyright (c) 2009, 2010, The OpenDKIM Project. All rights reserved.
<br>
By using this file, you agree to the terms and conditions set
forth in the respective licenses.
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