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<div id="projectname">libnl
 <span id="projectnumber">3.2.21</span>
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<div class="title">Extended Match</div> </div>
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Modules</h2></td></tr>
<tr class="memitem:group__em__meta"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__em__meta.html">Metadata Match</a></td></tr>
<tr class="memitem:group__em__nbyte"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__em__nbyte.html">N-Byte Comparison</a></td></tr>
<tr class="memitem:group__em__cmp"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__em__cmp.html">Simple packet data comparison</a></td></tr>
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Functions</h2></td></tr>
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int </td><td class="memItemRight" valign="bottom"><b>ematch_parse</b> (void *, char **, struct <a class="el" href="structnl__list__head.html">nl_list_head</a> *)</td></tr>
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int </td><td class="memItemRight" valign="bottom"><b>rtnl_ematch_parse_expr</b> (const char *expr, char **errp, struct rtnl_ematch_tree **result)</td></tr>
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char * </td><td class="memItemRight" valign="bottom"><b>rtnl_ematch_offset2txt</b> (uint8_t layer, uint16_t offset, char *buf, size_t len)</td></tr>
<tr class="memitem:ga5ce2d5e7da11e600297b2660055b4eb6"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ga5ce2d5e7da11e600297b2660055b4eb6"></a>
char * </td><td class="memItemRight" valign="bottom"><b>rtnl_ematch_opnd2txt</b> (uint8_t opnd, char *buf, size_t len)</td></tr>
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Module API</h2></td></tr>
<tr class="memitem:ga7d4df8c4fa0400da37c5eccd786e626b"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__ematch.html#ga7d4df8c4fa0400da37c5eccd786e626b">rtnl_ematch_register</a> (struct <a class="el" href="structrtnl__ematch__ops.html">rtnl_ematch_ops</a> *ops)</td></tr>
<tr class="memdesc:ga7d4df8c4fa0400da37c5eccd786e626b"><td class="mdescLeft"> </td><td class="mdescRight">Register ematch module. <a href="#ga7d4df8c4fa0400da37c5eccd786e626b"></a><br/></td></tr>
<tr class="memitem:gab8ad5b895ba9e9744cf50bcebdd9ed06"><td class="memItemLeft" align="right" valign="top">struct <a class="el" href="structrtnl__ematch__ops.html">rtnl_ematch_ops</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__ematch.html#gab8ad5b895ba9e9744cf50bcebdd9ed06">rtnl_ematch_lookup_ops</a> (int kind)</td></tr>
<tr class="memdesc:gab8ad5b895ba9e9744cf50bcebdd9ed06"><td class="mdescLeft"> </td><td class="mdescRight">Lookup ematch module by identification number. <a href="#gab8ad5b895ba9e9744cf50bcebdd9ed06"></a><br/></td></tr>
<tr class="memitem:gad73bbd3c13cd0c92acc8ec81d538c155"><td class="memItemLeft" align="right" valign="top">struct <a class="el" href="structrtnl__ematch__ops.html">rtnl_ematch_ops</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__ematch.html#gad73bbd3c13cd0c92acc8ec81d538c155">rtnl_ematch_lookup_ops_by_name</a> (const char *name)</td></tr>
<tr class="memdesc:gad73bbd3c13cd0c92acc8ec81d538c155"><td class="mdescLeft"> </td><td class="mdescRight">Lookup ematch module by name. <a href="#gad73bbd3c13cd0c92acc8ec81d538c155"></a><br/></td></tr>
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Match</h2></td></tr>
<tr class="memitem:gaffe71b9af389a39020bb1a3bcc04a58d"><td class="memItemLeft" align="right" valign="top">struct rtnl_ematch * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__ematch.html#gaffe71b9af389a39020bb1a3bcc04a58d">rtnl_ematch_alloc</a> (void)</td></tr>
<tr class="memdesc:gaffe71b9af389a39020bb1a3bcc04a58d"><td class="mdescLeft"> </td><td class="mdescRight">Allocate ematch object. <a href="#gaffe71b9af389a39020bb1a3bcc04a58d"></a><br/></td></tr>
<tr class="memitem:gad6185c5bffa495cd55054192c9282e91"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__ematch.html#gad6185c5bffa495cd55054192c9282e91">rtnl_ematch_add_child</a> (struct rtnl_ematch *parent, struct rtnl_ematch *child)</td></tr>
<tr class="memdesc:gad6185c5bffa495cd55054192c9282e91"><td class="mdescLeft"> </td><td class="mdescRight">Add ematch to the end of the parent's list of children. <a href="#gad6185c5bffa495cd55054192c9282e91"></a><br/></td></tr>
<tr class="memitem:gad04dc50b04f78ab72a1e644973964762"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__ematch.html#gad04dc50b04f78ab72a1e644973964762">rtnl_ematch_unlink</a> (struct rtnl_ematch *ematch)</td></tr>
<tr class="memdesc:gad04dc50b04f78ab72a1e644973964762"><td class="mdescLeft"> </td><td class="mdescRight">Remove ematch from the list of ematches it is linked to. <a href="#gad04dc50b04f78ab72a1e644973964762"></a><br/></td></tr>
<tr class="memitem:ga9e1b269e829112bd6837e8b47f5d917a"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ga9e1b269e829112bd6837e8b47f5d917a"></a>
void </td><td class="memItemRight" valign="bottom"><b>rtnl_ematch_free</b> (struct rtnl_ematch *ematch)</td></tr>
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int </td><td class="memItemRight" valign="bottom"><b>rtnl_ematch_set_ops</b> (struct rtnl_ematch *ematch, struct <a class="el" href="structrtnl__ematch__ops.html">rtnl_ematch_ops</a> *ops)</td></tr>
<tr class="memitem:gac454b6a118dc5795b58ac16e18fd1f61"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="gac454b6a118dc5795b58ac16e18fd1f61"></a>
int </td><td class="memItemRight" valign="bottom"><b>rtnl_ematch_set_kind</b> (struct rtnl_ematch *ematch, uint16_t kind)</td></tr>
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int </td><td class="memItemRight" valign="bottom"><b>rtnl_ematch_set_name</b> (struct rtnl_ematch *ematch, const char *name)</td></tr>
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void </td><td class="memItemRight" valign="bottom"><b>rtnl_ematch_set_flags</b> (struct rtnl_ematch *ematch, uint16_t flags)</td></tr>
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void </td><td class="memItemRight" valign="bottom"><b>rtnl_ematch_unset_flags</b> (struct rtnl_ematch *ematch, uint16_t flags)</td></tr>
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uint16_t </td><td class="memItemRight" valign="bottom"><b>rtnl_ematch_get_flags</b> (struct rtnl_ematch *ematch)</td></tr>
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void * </td><td class="memItemRight" valign="bottom"><b>rtnl_ematch_data</b> (struct rtnl_ematch *ematch)</td></tr>
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<tr class="heading"><td colspan="2"><h2><a name="member-group"></a>
Tree</h2></td></tr>
<tr class="memitem:gadb59baf48dad619186fc039610ae8602"><td class="memItemLeft" align="right" valign="top">struct rtnl_ematch_tree * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__ematch.html#gadb59baf48dad619186fc039610ae8602">rtnl_ematch_tree_alloc</a> (uint16_t progid)</td></tr>
<tr class="memdesc:gadb59baf48dad619186fc039610ae8602"><td class="mdescLeft"> </td><td class="mdescRight">Allocate ematch tree object. <a href="#gadb59baf48dad619186fc039610ae8602"></a><br/></td></tr>
<tr class="memitem:ga3e8ad918e1d3481b469a9edd6291875e"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__ematch.html#ga3e8ad918e1d3481b469a9edd6291875e">rtnl_ematch_tree_free</a> (struct rtnl_ematch_tree *tree)</td></tr>
<tr class="memdesc:ga3e8ad918e1d3481b469a9edd6291875e"><td class="mdescLeft"> </td><td class="mdescRight">Free ematch tree object. <a href="#ga3e8ad918e1d3481b469a9edd6291875e"></a><br/></td></tr>
<tr class="memitem:ga2ded11a00d3e46f888ad411394294440"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__ematch.html#ga2ded11a00d3e46f888ad411394294440">rtnl_ematch_tree_add</a> (struct rtnl_ematch_tree *tree, struct rtnl_ematch *ematch)</td></tr>
<tr class="memdesc:ga2ded11a00d3e46f888ad411394294440"><td class="mdescLeft"> </td><td class="mdescRight">Add ematch object to the end of the ematch tree. <a href="#ga2ded11a00d3e46f888ad411394294440"></a><br/></td></tr>
<tr class="memitem:gaaf3c76fa97f70a252154ca2055fed4d3"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__ematch.html#gaaf3c76fa97f70a252154ca2055fed4d3">rtnl_ematch_parse_attr</a> (struct nlattr *attr, struct rtnl_ematch_tree **result)</td></tr>
<tr class="memdesc:gaaf3c76fa97f70a252154ca2055fed4d3"><td class="mdescLeft"> </td><td class="mdescRight">Parse ematch netlink attributes. <a href="#gaaf3c76fa97f70a252154ca2055fed4d3"></a><br/></td></tr>
<tr class="memitem:ga18bf0846ad489a33a55e53183833e342"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ga18bf0846ad489a33a55e53183833e342"></a>
void </td><td class="memItemRight" valign="bottom"><b>rtnl_ematch_tree_dump</b> (struct rtnl_ematch_tree *tree, struct <a class="el" href="structnl__dump__params.html">nl_dump_params</a> *p)</td></tr>
<tr class="memitem:ga19d931b78cacaee9855a676a00b56d73"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ga19d931b78cacaee9855a676a00b56d73"></a>
int </td><td class="memItemRight" valign="bottom"><b>rtnl_ematch_fill_attr</b> (struct nl_msg *msg, int attrid, struct rtnl_ematch_tree *tree)</td></tr>
</table>
<hr/><a name="details" id="details"></a><h2>Detailed Description</h2>
<hr/><h2>Function Documentation</h2>
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<td class="memname">int rtnl_ematch_register </td>
<td>(</td>
<td class="paramtype">struct <a class="el" href="structrtnl__ematch__ops.html">rtnl_ematch_ops</a> * </td>
<td class="paramname"><em>ops</em></td><td>)</td>
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<p>Register ematch module. </p>
<dl class="params"><dt>Parameters:</dt><dd>
<table class="params">
<tr><td class="paramname">ops</td><td>Module operations.</td></tr>
</table>
</dd>
</dl>
<p>This function must be called by each ematch module at initialization time. It registers the calling module as available module.</p>
<dl class="section return"><dt>Returns:</dt><dd>0 on success or a negative error code. </dd></dl>
<p>Definition at line <a class="el" href="ematch_8c_source.html#l00045">45</a> of file <a class="el" href="ematch_8c_source.html">ematch.c</a>.</p>
<p>References <a class="el" href="ematch_8c_source.html#l00065">rtnl_ematch_lookup_ops()</a>.</p>
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<td class="memname">struct <a class="el" href="structrtnl__ematch__ops.html">rtnl_ematch_ops</a>* rtnl_ematch_lookup_ops </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"><em>kind</em></td><td>)</td>
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<p>Lookup ematch module by identification number. </p>
<dl class="params"><dt>Parameters:</dt><dd>
<table class="params">
<tr><td class="paramname">kind</td><td>Module kind.</td></tr>
</table>
</dd>
</dl>
<p>Searches the list of registered ematch modules for match and returns it.</p>
<dl class="section return"><dt>Returns:</dt><dd>Module operations or NULL if not found. </dd></dl>
<p>Definition at line <a class="el" href="ematch_8c_source.html#l00065">65</a> of file <a class="el" href="ematch_8c_source.html">ematch.c</a>.</p>
<p>Referenced by <a class="el" href="ematch_8c_source.html#l00339">rtnl_ematch_parse_attr()</a>, and <a class="el" href="ematch_8c_source.html#l00045">rtnl_ematch_register()</a>.</p>
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<td class="memname">struct <a class="el" href="structrtnl__ematch__ops.html">rtnl_ematch_ops</a>* rtnl_ematch_lookup_ops_by_name </td>
<td>(</td>
<td class="paramtype">const char * </td>
<td class="paramname"><em>name</em></td><td>)</td>
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<p>Lookup ematch module by name. </p>
<dl class="params"><dt>Parameters:</dt><dd>
<table class="params">
<tr><td class="paramname">name</td><td>Name of ematch module.</td></tr>
</table>
</dd>
</dl>
<p>Searches the list of registered ematch modules for a match and returns it.</p>
<dl class="section return"><dt>Returns:</dt><dd>Module operations or NULL if not fuond. </dd></dl>
<p>Definition at line <a class="el" href="ematch_8c_source.html#l00084">84</a> of file <a class="el" href="ematch_8c_source.html">ematch.c</a>.</p>
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<td class="memname">struct rtnl_ematch* rtnl_ematch_alloc </td>
<td>(</td>
<td class="paramtype">void </td>
<td class="paramname"></td><td>)</td>
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<p>Allocate ematch object. </p>
<p>Allocates and initializes an ematch object.</p>
<dl class="section return"><dt>Returns:</dt><dd>New ematch object or NULL. </dd></dl>
<p>Definition at line <a class="el" href="ematch_8c_source.html#l00108">108</a> of file <a class="el" href="ematch_8c_source.html">ematch.c</a>.</p>
<p>Referenced by <a class="el" href="ematch_8c_source.html#l00339">rtnl_ematch_parse_attr()</a>.</p>
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<td class="memname">int rtnl_ematch_add_child </td>
<td>(</td>
<td class="paramtype">struct rtnl_ematch * </td>
<td class="paramname"><em>parent</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">struct rtnl_ematch * </td>
<td class="paramname"><em>child</em> </td>
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<td></td>
<td>)</td>
<td></td><td></td>
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<p>Add ematch to the end of the parent's list of children. </p>
<dl class="params"><dt>Parameters:</dt><dd>
<table class="params">
<tr><td class="paramname">parent</td><td>parent ematch object </td></tr>
<tr><td class="paramname">child</td><td>ematch object to be added to parent</td></tr>
</table>
</dd>
</dl>
<p>The parent must be a container ematch. </p>
<p>Definition at line <a class="el" href="ematch_8c_source.html#l00130">130</a> of file <a class="el" href="ematch_8c_source.html">ematch.c</a>.</p>
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<td class="memname">void rtnl_ematch_unlink </td>
<td>(</td>
<td class="paramtype">struct rtnl_ematch * </td>
<td class="paramname"><em>ematch</em></td><td>)</td>
<td></td>
</tr>
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<p>Remove ematch from the list of ematches it is linked to. </p>
<dl class="params"><dt>Parameters:</dt><dd>
<table class="params">
<tr><td class="paramname">ematch</td><td>ematch object </td></tr>
</table>
</dd>
</dl>
<p>Definition at line <a class="el" href="ematch_8c_source.html#l00148">148</a> of file <a class="el" href="ematch_8c_source.html">ematch.c</a>.</p>
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<td class="memname">struct rtnl_ematch_tree* rtnl_ematch_tree_alloc </td>
<td>(</td>
<td class="paramtype">uint16_t </td>
<td class="paramname"><em>progid</em></td><td>)</td>
<td></td>
</tr>
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</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">read</span></span> </td>
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<p>Allocate ematch tree object. </p>
<dl class="params"><dt>Parameters:</dt><dd>
<table class="params">
<tr><td class="paramname">progid</td><td>program id </td></tr>
</table>
</dd>
</dl>
<p>Definition at line <a class="el" href="ematch_8c_source.html#l00247">247</a> of file <a class="el" href="ematch_8c_source.html">ematch.c</a>.</p>
<p>Referenced by <a class="el" href="ematch_8c_source.html#l00339">rtnl_ematch_parse_attr()</a>.</p>
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<td class="memname">void rtnl_ematch_tree_free </td>
<td>(</td>
<td class="paramtype">struct rtnl_ematch_tree * </td>
<td class="paramname"><em>tree</em></td><td>)</td>
<td></td>
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<p>Free ematch tree object. </p>
<dl class="params"><dt>Parameters:</dt><dd>
<table class="params">
<tr><td class="paramname">tree</td><td>ematch tree object</td></tr>
</table>
</dd>
</dl>
<p>This function frees the ematch tree and all ematches attached to it. </p>
<p>Definition at line <a class="el" href="ematch_8c_source.html#l00279">279</a> of file <a class="el" href="ematch_8c_source.html">ematch.c</a>.</p>
<p>Referenced by <a class="el" href="ematch_8c_source.html#l00339">rtnl_ematch_parse_attr()</a>.</p>
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<td class="memname">void rtnl_ematch_tree_add </td>
<td>(</td>
<td class="paramtype">struct rtnl_ematch_tree * </td>
<td class="paramname"><em>tree</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">struct rtnl_ematch * </td>
<td class="paramname"><em>ematch</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
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<p>Add ematch object to the end of the ematch tree. </p>
<dl class="params"><dt>Parameters:</dt><dd>
<table class="params">
<tr><td class="paramname">tree</td><td>ematch tree object </td></tr>
<tr><td class="paramname">ematch</td><td>ematch object to add </td></tr>
</table>
</dd>
</dl>
<p>Definition at line <a class="el" href="ematch_8c_source.html#l00295">295</a> of file <a class="el" href="ematch_8c_source.html">ematch.c</a>.</p>
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<td class="memname">int rtnl_ematch_parse_attr </td>
<td>(</td>
<td class="paramtype">struct nlattr * </td>
<td class="paramname"><em>attr</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">struct rtnl_ematch_tree ** </td>
<td class="paramname"><em>result</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
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<p>Parse ematch netlink attributes. </p>
<dl class="section return"><dt>Returns:</dt><dd>0 on success or a negative error code. </dd></dl>
<p>Definition at line <a class="el" href="ematch_8c_source.html#l00339">339</a> of file <a class="el" href="ematch_8c_source.html">ematch.c</a>.</p>
<p>References <a class="el" href="attr_8c_source.html#l00120">nla_data()</a>, <a class="el" href="attr_8h_source.html#l00272">nla_for_each_nested</a>, <a class="el" href="attr_8c_source.html#l00131">nla_len()</a>, <a class="el" href="attr_8c_source.html#l00865">nla_parse_nested()</a>, <a class="el" href="attr_8c_source.html#l00073">nla_total_size()</a>, <a class="el" href="ematch_8c_source.html#l00108">rtnl_ematch_alloc()</a>, <a class="el" href="ematch_8c_source.html#l00065">rtnl_ematch_lookup_ops()</a>, <a class="el" href="ematch_8c_source.html#l00247">rtnl_ematch_tree_alloc()</a>, and <a class="el" href="ematch_8c_source.html#l00279">rtnl_ematch_tree_free()</a>.</p>
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