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<title>Snort AI preprocessor module: spp_ai.h File Reference</title>
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<a href="#nested-classes">Data Structures</a> &#124;
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<a href="#define-members">Defines</a> &#124;
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<a href="#typedef-members">Typedefs</a> &#124;
<a href="#enum-members">Enumerations</a> &#124;
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<h1>spp_ai.h File Reference</h1> </div>
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<code>#include &quot;sf_snort_packet.h&quot;</code><br/>
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<code>#include &quot;sf_dynamic_preprocessor.h&quot;</code><br/>
<code>#include &quot;uthash.h&quot;</code><br/>
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<p><a href="spp__ai_8h_source.html">Go to the source code of this file.</a></p>
<table class="memberdecls">
<tr><td colspan="2"><h2><a name="nested-classes"></a>
Data Structures</h2></td></tr>
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<tr><td class="memItemLeft" align="right" valign="top">struct &nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="structpkt__key.html">pkt_key</a></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">struct &nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="structpkt__info.html">pkt_info</a></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">struct &nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="structAI__config.html">AI_config</a></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">struct &nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="struct__hierarchy__node.html">_hierarchy_node</a></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">struct &nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="struct__AI__snort__alert.html">_AI_snort_alert</a></td></tr>
<tr><td colspan="2"><h2><a name="define-members"></a>
Defines</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="spp__ai_8h.html#a5e151c615eda34903514212f05a5ccf8">PRIVATE</a>&nbsp;&nbsp;&nbsp;static</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="spp__ai_8h.html#a5f555c0ebd29ce2771a3e2dd4f526746">DEFAULT_HASH_CLEANUP_INTERVAL</a>&nbsp;&nbsp;&nbsp;300</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="spp__ai_8h.html#a0f6a189af15ef783fb46ed37c144e031">DEFAULT_STREAM_EXPIRE_INTERVAL</a>&nbsp;&nbsp;&nbsp;300</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="spp__ai_8h.html#a3c4984a0ee515fbc091ac6e33b05e310">DEFAULT_DATABASE_INTERVAL</a>&nbsp;&nbsp;&nbsp;30</td></tr>
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<tr><td class="memItemLeft" align="right" valign="top">#define&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="spp__ai_8h.html#a0c4b6fce670e46083e33b9f53b78f39e">DEFAULT_ALERT_CLUSTERING_INTERVAL</a>&nbsp;&nbsp;&nbsp;3600</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="spp__ai_8h.html#a6d9bf552c32371e0144dc6a6209c7e4a">DEFAULT_ALERT_LOG_FILE</a>&nbsp;&nbsp;&nbsp;&quot;/var/log/snort/alert&quot;</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="spp__ai_8h.html#a803dc913297ccdace9e604dbfecda97d">DEFAULT_CLUSTER_LOG_FILE</a>&nbsp;&nbsp;&nbsp;&quot;/var/log/snort/cluster_alert&quot;</td></tr>
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<tr><td colspan="2"><h2><a name="typedef-members"></a>
Typedefs</h2></td></tr>
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<tr><td class="memItemLeft" align="right" valign="top">typedef unsigned char&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="spp__ai_8h.html#aba7bc1797add20fe3efdf37ced1182c5">uint8_t</a></td></tr>
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<tr><td class="memItemLeft" align="right" valign="top">typedef unsigned short&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="spp__ai_8h.html#a273cf69d639a59973b6019625df33e30">uint16_t</a></td></tr>
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<tr><td class="memItemLeft" align="right" valign="top">typedef unsigned int&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="spp__ai_8h.html#a435d1572bf3f880d55459d9805097f62">uint32_t</a></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">typedef struct <a class="el" href="struct__hierarchy__node.html">_hierarchy_node</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="spp__ai_8h.html#a466391129919ef12366d311d501552fa">hierarchy_node</a></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">typedef struct <a class="el" href="struct__AI__snort__alert.html">_AI_snort_alert</a>&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="spp__ai_8h.html#a982be90e72362e88d09f28336c9a1897">AI_snort_alert</a></td></tr>
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<tr><td colspan="2"><h2><a name="enum-members"></a>
Enumerations</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">enum &nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="spp__ai_8h.html#a3e5b8192e7d9ffaf3542f1210aec18dd">BOOL</a> { <a class="el" href="spp__ai_8h.html#a3e5b8192e7d9ffaf3542f1210aec18ddae9de385ef6fe9bf3360d1038396b884c">false</a>,
<a class="el" href="spp__ai_8h.html#a3e5b8192e7d9ffaf3542f1210aec18dda08f175a5505a10b9ed657defeb050e4b">true</a>
}</td></tr>
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<tr><td class="memItemLeft" align="right" valign="top">enum &nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="spp__ai_8h.html#ae2ff3c6586aa2ab211a102abfde86640">cluster_type</a> { <br/>
&nbsp;&nbsp;<a class="el" href="spp__ai_8h.html#ae2ff3c6586aa2ab211a102abfde86640ab7e4e0120a041dbe6528b050c04269e0">none</a>,
<a class="el" href="spp__ai_8h.html#ae2ff3c6586aa2ab211a102abfde86640abc900639df18f0f5f2f63a1f033fe42f">src_addr</a>,
<a class="el" href="spp__ai_8h.html#ae2ff3c6586aa2ab211a102abfde86640aa000f955ef1374c60cdb16bf43a1593c">dst_addr</a>,
<a class="el" href="spp__ai_8h.html#ae2ff3c6586aa2ab211a102abfde86640ac1335c508143eb06843af2ce5ff3027b">src_port</a>,
<br/>
&nbsp;&nbsp;<a class="el" href="spp__ai_8h.html#ae2ff3c6586aa2ab211a102abfde86640abc4f89a184ada44073bd6f54d7fc11c9">dst_port</a>,
<a class="el" href="spp__ai_8h.html#ae2ff3c6586aa2ab211a102abfde86640ab16bb5c4b330d5db02e2d852cd2ba451">CLUSTER_TYPES</a>
<br/>
}</td></tr>
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<tr><td colspan="2"><h2><a name="func-members"></a>
Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__regex.html#ga35f57c052a7de1ded54b67a1f7819791">preg_match</a> (const char *, char *, char ***, int *)</td></tr>
<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Check if a string matches a regular expression. <a href="group__regex.html#ga35f57c052a7de1ded54b67a1f7819791"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void *&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__stream.html#ga24b1131374e5059564b8a12380c4eb75">AI_hashcleanup_thread</a> (void *)</td></tr>
<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Thread called for cleaning up the hash table from the traffic streams older than a certain threshold. <a href="group__stream.html#ga24b1131374e5059564b8a12380c4eb75"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void *&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__alert__parser.html#ga5aab8d9bdf0e92a51731442fd787f61f">AI_file_alertparser_thread</a> (void *)</td></tr>
<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Thread for parsing Snort's alert file. <a href="group__alert__parser.html#ga5aab8d9bdf0e92a51731442fd787f61f"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__stream.html#ga7d71c5645b9baff7b6c4b9a181bf80c5">AI_pkt_enqueue</a> (SFSnortPacket *)</td></tr>
<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Function called for appending a new packet to the hash table, creating a new stream or appending it to an existing stream. <a href="group__stream.html#ga7d71c5645b9baff7b6c4b9a181bf80c5"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__stream.html#ga8749989cee2ac05a7de058faac280c02">AI_set_stream_observed</a> (struct <a class="el" href="structpkt__key.html">pkt_key</a> key)</td></tr>
<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Set the flag "observed" on a stream associated to a security alert, so that it won't be removed from the hash table. <a href="group__stream.html#ga8749989cee2ac05a7de058faac280c02"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__cluster.html#ga1445818b37483f78cc3fb2890155842c">AI_hierarchies_build</a> (<a class="el" href="structAI__config.html">AI_config</a> *, <a class="el" href="struct__hierarchy__node.html">hierarchy_node</a> **, int)</td></tr>
<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Build the clustering hierarchy trees. <a href="group__cluster.html#ga1445818b37483f78cc3fb2890155842c"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">struct <a class="el" href="structpkt__info.html">pkt_info</a> *&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__stream.html#ga2efedcabbfd12c5345f0c93a3dd4735c">AI_get_stream_by_key</a> (struct <a class="el" href="structpkt__key.html">pkt_key</a>)</td></tr>
<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Get a TCP stream by key. <a href="group__stream.html#ga2efedcabbfd12c5345f0c93a3dd4735c"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="struct__AI__snort__alert.html">AI_snort_alert</a> *&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__alert__parser.html#ga99474495643197b3075ac22ec6f6c70f">AI_get_alerts</a> (void)</td></tr>
<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Return the alerts parsed so far as a linked list. <a href="group__alert__parser.html#ga99474495643197b3075ac22ec6f6c70f"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__alert__parser.html#ga270e86669a0aa64a8da37bc16cda645b">AI_free_alerts</a> (<a class="el" href="struct__AI__snort__alert.html">AI_snort_alert</a> *node)</td></tr>
<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Deallocate the memory of a log alert linked list. <a href="group__alert__parser.html#ga270e86669a0aa64a8da37bc16cda645b"></a><br/></td></tr>
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<tr><td colspan="2"><h2><a name="var-members"></a>
Variables</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">DynamicPreprocessorData&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="spp__ai_8h.html#ab46420126c43c1aac5eabc5db266a71c">_dpd</a></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="struct__AI__snort__alert.html">AI_snort_alert</a> *(*&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="spp__ai_8h.html#ab184b676360ce03035801284a2bd1ea7">get_alerts</a> )(void)</td></tr>
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</table>
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<hr/><h2>Define Documentation</h2>
<a class="anchor" id="a0c4b6fce670e46083e33b9f53b78f39e"></a><!-- doxytag: member="spp_ai.h::DEFAULT_ALERT_CLUSTERING_INTERVAL" ref="a0c4b6fce670e46083e33b9f53b78f39e" args="" -->
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<td class="memname">#define DEFAULT_ALERT_CLUSTERING_INTERVAL&nbsp;&nbsp;&nbsp;3600</td>
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<p>Default interval in seconds for the thread clustering alerts </p>
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<a class="anchor" id="a6d9bf552c32371e0144dc6a6209c7e4a"></a><!-- doxytag: member="spp_ai.h::DEFAULT_ALERT_LOG_FILE" ref="a6d9bf552c32371e0144dc6a6209c7e4a" args="" -->
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<td class="memname">#define DEFAULT_ALERT_LOG_FILE&nbsp;&nbsp;&nbsp;&quot;/var/log/snort/alert&quot;</td>
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<p>Default path to Snort's log file </p>
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<a class="anchor" id="a803dc913297ccdace9e604dbfecda97d"></a><!-- doxytag: member="spp_ai.h::DEFAULT_CLUSTER_LOG_FILE" ref="a803dc913297ccdace9e604dbfecda97d" args="" -->
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<td class="memname">#define DEFAULT_CLUSTER_LOG_FILE&nbsp;&nbsp;&nbsp;&quot;/var/log/snort/cluster_alert&quot;</td>
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<p>Default path to Snort's clustered alerts file </p>
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<a class="anchor" id="a3c4984a0ee515fbc091ac6e33b05e310"></a><!-- doxytag: member="spp_ai.h::DEFAULT_DATABASE_INTERVAL" ref="a3c4984a0ee515fbc091ac6e33b05e310" args="" -->
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<td class="memname">#define DEFAULT_DATABASE_INTERVAL&nbsp;&nbsp;&nbsp;30</td>
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<p>Default interval in seconds for reading alerts from the alert database, if used </p>
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<a class="anchor" id="a5f555c0ebd29ce2771a3e2dd4f526746"></a><!-- doxytag: member="spp_ai.h::DEFAULT_HASH_CLEANUP_INTERVAL" ref="a5f555c0ebd29ce2771a3e2dd4f526746" args="" -->
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<td class="memname">#define DEFAULT_HASH_CLEANUP_INTERVAL&nbsp;&nbsp;&nbsp;300</td>
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<p>Default interval in seconds for the thread cleaning up TCP streams </p>
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<a class="anchor" id="a0f6a189af15ef783fb46ed37c144e031"></a><!-- doxytag: member="spp_ai.h::DEFAULT_STREAM_EXPIRE_INTERVAL" ref="a0f6a189af15ef783fb46ed37c144e031" args="" -->
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<td class="memname">#define DEFAULT_STREAM_EXPIRE_INTERVAL&nbsp;&nbsp;&nbsp;300</td>
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<p>Default interval in seconds before a stream without any packet is considered timed out </p>
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<a class="anchor" id="a5e151c615eda34903514212f05a5ccf8"></a><!-- doxytag: member="spp_ai.h::PRIVATE" ref="a5e151c615eda34903514212f05a5ccf8" args="" -->
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<td class="memname">#define PRIVATE&nbsp;&nbsp;&nbsp;static</td>
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<hr/><h2>Typedef Documentation</h2>
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<a class="anchor" id="a982be90e72362e88d09f28336c9a1897"></a><!-- doxytag: member="spp_ai.h::AI_snort_alert" ref="a982be90e72362e88d09f28336c9a1897" args="" -->
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<td class="memname">typedef struct <a class="el" href="struct__AI__snort__alert.html">_AI_snort_alert</a> <a class="el" href="struct__AI__snort__alert.html">AI_snort_alert</a></td>
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<p>Data type for Snort alerts </p>
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<a class="anchor" id="a466391129919ef12366d311d501552fa"></a><!-- doxytag: member="spp_ai.h::hierarchy_node" ref="a466391129919ef12366d311d501552fa" args="" -->
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<td class="memname">typedef struct <a class="el" href="struct__hierarchy__node.html">_hierarchy_node</a> <a class="el" href="struct__hierarchy__node.html">hierarchy_node</a></td>
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<a class="anchor" id="a273cf69d639a59973b6019625df33e30"></a><!-- doxytag: member="spp_ai.h::uint16_t" ref="a273cf69d639a59973b6019625df33e30" args="" -->
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<td class="memname">typedef unsigned short <a class="el" href="spp__ai_8h.html#a273cf69d639a59973b6019625df33e30">uint16_t</a></td>
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<a class="anchor" id="a435d1572bf3f880d55459d9805097f62"></a><!-- doxytag: member="spp_ai.h::uint32_t" ref="a435d1572bf3f880d55459d9805097f62" args="" -->
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<td class="memname">typedef unsigned int <a class="el" href="spp__ai_8h.html#a435d1572bf3f880d55459d9805097f62">uint32_t</a></td>
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<a class="anchor" id="aba7bc1797add20fe3efdf37ced1182c5"></a><!-- doxytag: member="spp_ai.h::uint8_t" ref="aba7bc1797add20fe3efdf37ced1182c5" args="" -->
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<td class="memname">typedef unsigned char <a class="el" href="spp__ai_8h.html#aba7bc1797add20fe3efdf37ced1182c5">uint8_t</a></td>
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<hr/><h2>Enumeration Type Documentation</h2>
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<td class="memname">enum <a class="el" href="spp__ai_8h.html#a3e5b8192e7d9ffaf3542f1210aec18dd">BOOL</a></td>
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<dl><dt><b>Enumerator: </b></dt><dd><table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"><em><a class="anchor" id="a3e5b8192e7d9ffaf3542f1210aec18ddae9de385ef6fe9bf3360d1038396b884c"></a><!-- doxytag: member="false" ref="a3e5b8192e7d9ffaf3542f1210aec18ddae9de385ef6fe9bf3360d1038396b884c" args="" -->false</em>&nbsp;</td><td>
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<tr><td valign="top"><em><a class="anchor" id="a3e5b8192e7d9ffaf3542f1210aec18dda08f175a5505a10b9ed657defeb050e4b"></a><!-- doxytag: member="true" ref="a3e5b8192e7d9ffaf3542f1210aec18dda08f175a5505a10b9ed657defeb050e4b" args="" -->true</em>&nbsp;</td><td>
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<a class="anchor" id="ae2ff3c6586aa2ab211a102abfde86640"></a><!-- doxytag: member="spp_ai.h::cluster_type" ref="ae2ff3c6586aa2ab211a102abfde86640" args="" -->
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<td class="memname">enum <a class="el" href="spp__ai_8h.html#ae2ff3c6586aa2ab211a102abfde86640">cluster_type</a></td>
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<p>Possible types of clustering attributes </p>
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<dl><dt><b>Enumerator: </b></dt><dd><table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"><em><a class="anchor" id="ae2ff3c6586aa2ab211a102abfde86640ab7e4e0120a041dbe6528b050c04269e0"></a><!-- doxytag: member="none" ref="ae2ff3c6586aa2ab211a102abfde86640ab7e4e0120a041dbe6528b050c04269e0" args="" -->none</em>&nbsp;</td><td>
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<tr><td valign="top"><em><a class="anchor" id="ae2ff3c6586aa2ab211a102abfde86640abc900639df18f0f5f2f63a1f033fe42f"></a><!-- doxytag: member="src_addr" ref="ae2ff3c6586aa2ab211a102abfde86640abc900639df18f0f5f2f63a1f033fe42f" args="" -->src_addr</em>&nbsp;</td><td>
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<tr><td valign="top"><em><a class="anchor" id="ae2ff3c6586aa2ab211a102abfde86640aa000f955ef1374c60cdb16bf43a1593c"></a><!-- doxytag: member="dst_addr" ref="ae2ff3c6586aa2ab211a102abfde86640aa000f955ef1374c60cdb16bf43a1593c" args="" -->dst_addr</em>&nbsp;</td><td>
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<tr><td valign="top"><em><a class="anchor" id="ae2ff3c6586aa2ab211a102abfde86640ac1335c508143eb06843af2ce5ff3027b"></a><!-- doxytag: member="src_port" ref="ae2ff3c6586aa2ab211a102abfde86640ac1335c508143eb06843af2ce5ff3027b" args="" -->src_port</em>&nbsp;</td><td>
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<tr><td valign="top"><em><a class="anchor" id="ae2ff3c6586aa2ab211a102abfde86640abc4f89a184ada44073bd6f54d7fc11c9"></a><!-- doxytag: member="dst_port" ref="ae2ff3c6586aa2ab211a102abfde86640abc4f89a184ada44073bd6f54d7fc11c9" args="" -->dst_port</em>&nbsp;</td><td>
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<tr><td valign="top"><em><a class="anchor" id="ae2ff3c6586aa2ab211a102abfde86640ab16bb5c4b330d5db02e2d852cd2ba451"></a><!-- doxytag: member="CLUSTER_TYPES" ref="ae2ff3c6586aa2ab211a102abfde86640ab16bb5c4b330d5db02e2d852cd2ba451" args="" -->CLUSTER_TYPES</em>&nbsp;</td><td>
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<hr/><h2>Variable Documentation</h2>
<a class="anchor" id="ab46420126c43c1aac5eabc5db266a71c"></a><!-- doxytag: member="spp_ai.h::_dpd" ref="ab46420126c43c1aac5eabc5db266a71c" args="" -->
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<td class="memname">DynamicPreprocessorData <a class="el" href="spp__ai_8h.html#ab46420126c43c1aac5eabc5db266a71c">_dpd</a></td>
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<a class="anchor" id="ab184b676360ce03035801284a2bd1ea7"></a><!-- doxytag: member="spp_ai.h::get_alerts" ref="ab184b676360ce03035801284a2bd1ea7" args=")(void)" -->
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<td class="memname"><a class="el" href="struct__AI__snort__alert.html">AI_snort_alert</a>*(* <a class="el" href="spp__ai_8h.html#ab184b676360ce03035801284a2bd1ea7">get_alerts</a>)(void)</td>
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<p>Function pointer to the function used for getting the alert list (from log file, db, ...) </p>
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