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libnl-devel-1.1-14.fc14.x86_64.rpm

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<h1>lib/route/cls/fw.c</h1>  </div>
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<div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> * lib/route/cls/fw.c           fw classifier</span>
<a name="l00003"></a>00003 <span class="comment"> *</span>
<a name="l00004"></a>00004 <span class="comment"> *      This library is free software; you can redistribute it and/or</span>
<a name="l00005"></a>00005 <span class="comment"> *      modify it under the terms of the GNU Lesser General Public</span>
<a name="l00006"></a>00006 <span class="comment"> *      License as published by the Free Software Foundation version 2.1</span>
<a name="l00007"></a>00007 <span class="comment"> *      of the License.</span>
<a name="l00008"></a>00008 <span class="comment"> *</span>
<a name="l00009"></a>00009 <span class="comment"> * Copyright (c) 2003-2006 Thomas Graf &lt;tgraf@suug.ch&gt;</span>
<a name="l00010"></a>00010 <span class="comment"> * Copyright (c) 2006 Petr Gotthard &lt;petr.gotthard@siemens.com&gt;</span>
<a name="l00011"></a>00011 <span class="comment"> * Copyright (c) 2006 Siemens AG Oesterreich</span>
<a name="l00012"></a>00012 <span class="comment"> */</span>
<a name="l00013"></a>00013 <span class="comment"></span>
<a name="l00014"></a>00014 <span class="comment">/**</span>
<a name="l00015"></a>00015 <span class="comment"> * @ingroup cls_api</span>
<a name="l00016"></a>00016 <span class="comment"> * @defgroup fw Firewall Classifier</span>
<a name="l00017"></a>00017 <span class="comment"> *</span>
<a name="l00018"></a>00018 <span class="comment"> * @{</span>
<a name="l00019"></a>00019 <span class="comment"> */</span>
<a name="l00020"></a>00020 
<a name="l00021"></a>00021 <span class="preprocessor">#include &lt;netlink-local.h&gt;</span>
<a name="l00022"></a>00022 <span class="preprocessor">#include &lt;netlink-tc.h&gt;</span>
<a name="l00023"></a>00023 <span class="preprocessor">#include &lt;netlink/netlink.h&gt;</span>
<a name="l00024"></a>00024 <span class="preprocessor">#include &lt;netlink/route/classifier.h&gt;</span>
<a name="l00025"></a>00025 <span class="preprocessor">#include &lt;netlink/route/classifier-modules.h&gt;</span>
<a name="l00026"></a>00026 <span class="preprocessor">#include &lt;netlink/route/cls/fw.h&gt;</span>
<a name="l00027"></a>00027 <span class="comment"></span>
<a name="l00028"></a>00028 <span class="comment">/** @cond SKIP */</span>
<a name="l00029"></a>00029 <span class="preprocessor">#define FW_ATTR_CLASSID      0x001</span>
<a name="l00030"></a>00030 <span class="preprocessor"></span><span class="preprocessor">#define FW_ATTR_ACTION       0x002</span>
<a name="l00031"></a>00031 <span class="preprocessor"></span><span class="preprocessor">#define FW_ATTR_POLICE       0x004</span>
<a name="l00032"></a>00032 <span class="preprocessor"></span><span class="preprocessor">#define FW_ATTR_INDEV        0x008</span>
<a name="l00033"></a>00033 <span class="preprocessor"></span><span class="comment">/** @endcond */</span>
<a name="l00034"></a>00034 
<a name="l00035"></a>00035 <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keyword">struct </span>rtnl_fw *fw_cls(<span class="keyword">struct</span> rtnl_cls *cls)
<a name="l00036"></a>00036 {
<a name="l00037"></a>00037         <span class="keywordflow">return</span> (<span class="keyword">struct</span> rtnl_fw *) cls-&gt;c_subdata;
<a name="l00038"></a>00038 }
<a name="l00039"></a>00039 
<a name="l00040"></a>00040 <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keyword">struct </span>rtnl_fw *fw_alloc(<span class="keyword">struct</span> rtnl_cls *cls)
<a name="l00041"></a>00041 {
<a name="l00042"></a>00042         <span class="keywordflow">if</span> (!cls-&gt;c_subdata)
<a name="l00043"></a>00043                 cls-&gt;c_subdata = calloc(1, <span class="keyword">sizeof</span>(<span class="keyword">struct</span> rtnl_fw));
<a name="l00044"></a>00044 
<a name="l00045"></a>00045         <span class="keywordflow">return</span> fw_cls(cls);
<a name="l00046"></a>00046 }
<a name="l00047"></a>00047 
<a name="l00048"></a>00048 <span class="keyword">static</span> <span class="keyword">struct </span><a class="code" href="structnla__policy.html" title="attribute validation policy">nla_policy</a> fw_policy[TCA_FW_MAX+1] = {
<a name="l00049"></a>00049         [TCA_FW_CLASSID]        = { .<a class="code" href="structnla__policy.html#aaa36c9d1e298fc9e4ee16a8fb553b32a" title="Type of attribute or NLA_UNSPEC.">type</a> = <a class="code" href="group__attr.html#gga06fc87d81c62e9abb8790b6e5713c55babddb836025b456b06b025c293bff6dc8" title="32bit integer">NLA_U32</a> },
<a name="l00050"></a>00050         [TCA_FW_INDEV]          = { .type = <a class="code" href="group__attr.html#gga06fc87d81c62e9abb8790b6e5713c55ba284d1eafd6d5d99cedaff3cd5f5a8378" title="character string">NLA_STRING</a>,
<a name="l00051"></a>00051                                     .maxlen = IFNAMSIZ },
<a name="l00052"></a>00052 };
<a name="l00053"></a>00053 
<a name="l00054"></a>00054 <span class="keyword">static</span> <span class="keywordtype">int</span> fw_msg_parser(<span class="keyword">struct</span> rtnl_cls *cls)
<a name="l00055"></a>00055 {
<a name="l00056"></a>00056         <span class="keywordtype">int</span> err;
<a name="l00057"></a>00057         <span class="keyword">struct </span>nlattr *tb[TCA_FW_MAX + 1];
<a name="l00058"></a>00058         <span class="keyword">struct </span>rtnl_fw *f;
<a name="l00059"></a>00059 
<a name="l00060"></a>00060         err = tca_parse(tb, TCA_FW_MAX, (<span class="keyword">struct</span> rtnl_tca *) cls, fw_policy);
<a name="l00061"></a>00061         <span class="keywordflow">if</span> (err &lt; 0)
<a name="l00062"></a>00062                 <span class="keywordflow">return</span> err;
<a name="l00063"></a>00063 
<a name="l00064"></a>00064         f = fw_alloc(cls);
<a name="l00065"></a>00065         <span class="keywordflow">if</span> (!f)
<a name="l00066"></a>00066                 <span class="keywordflow">goto</span> errout_nomem;
<a name="l00067"></a>00067 
<a name="l00068"></a>00068         <span class="keywordflow">if</span> (tb[TCA_FW_CLASSID]) {
<a name="l00069"></a>00069                 f-&gt;cf_classid = <a class="code" href="group__attr.html#gabda0290a8b26cc577c2c5cefa814aeac" title="Return payload of u32 attribute.">nla_get_u32</a>(tb[TCA_FW_CLASSID]);
<a name="l00070"></a>00070                 f-&gt;cf_mask |= FW_ATTR_CLASSID;
<a name="l00071"></a>00071         }
<a name="l00072"></a>00072 
<a name="l00073"></a>00073         <span class="keywordflow">if</span> (tb[TCA_FW_ACT]) {
<a name="l00074"></a>00074                 f-&gt;cf_act = <a class="code" href="group__attr.html#ga33a5aef23c5d26c8247632ed1f167068" title="Return payload of abstract data attribute.">nla_get_data</a>(tb[TCA_FW_ACT]);
<a name="l00075"></a>00075                 <span class="keywordflow">if</span> (!f-&gt;cf_act)
<a name="l00076"></a>00076                         <span class="keywordflow">goto</span> errout_nomem;
<a name="l00077"></a>00077                 f-&gt;cf_mask |= FW_ATTR_ACTION;
<a name="l00078"></a>00078         }
<a name="l00079"></a>00079 
<a name="l00080"></a>00080         <span class="keywordflow">if</span> (tb[TCA_FW_POLICE]) {
<a name="l00081"></a>00081                 f-&gt;cf_police = <a class="code" href="group__attr.html#ga33a5aef23c5d26c8247632ed1f167068" title="Return payload of abstract data attribute.">nla_get_data</a>(tb[TCA_FW_POLICE]);
<a name="l00082"></a>00082                 <span class="keywordflow">if</span> (!f-&gt;cf_police)
<a name="l00083"></a>00083                         <span class="keywordflow">goto</span> errout_nomem;
<a name="l00084"></a>00084                 f-&gt;cf_mask |= FW_ATTR_POLICE;
<a name="l00085"></a>00085         }
<a name="l00086"></a>00086 
<a name="l00087"></a>00087         <span class="keywordflow">if</span> (tb[TCA_FW_INDEV]) {
<a name="l00088"></a>00088                 <a class="code" href="group__attr.html#gaabddc8018334423d84088d241b4b7830" title="Copy string attribute payload into a sized buffer.">nla_strlcpy</a>(f-&gt;cf_indev, tb[TCA_FW_INDEV], IFNAMSIZ);
<a name="l00089"></a>00089                 f-&gt;cf_mask |= FW_ATTR_INDEV;
<a name="l00090"></a>00090         }
<a name="l00091"></a>00091 
<a name="l00092"></a>00092         <span class="keywordflow">return</span> 0;
<a name="l00093"></a>00093 
<a name="l00094"></a>00094 errout_nomem:
<a name="l00095"></a>00095         err = nl_errno(ENOMEM);
<a name="l00096"></a>00096 
<a name="l00097"></a>00097         <span class="keywordflow">return</span> err;
<a name="l00098"></a>00098 }
<a name="l00099"></a>00099 
<a name="l00100"></a>00100 <span class="keyword">static</span> <span class="keywordtype">void</span> fw_free_data(<span class="keyword">struct</span> rtnl_cls *cls)
<a name="l00101"></a>00101 {
<a name="l00102"></a>00102         <span class="keyword">struct </span>rtnl_fw *f = fw_cls(cls);
<a name="l00103"></a>00103 
<a name="l00104"></a>00104         <span class="keywordflow">if</span> (!f)
<a name="l00105"></a>00105                 <span class="keywordflow">return</span>;
<a name="l00106"></a>00106 
<a name="l00107"></a>00107         <a class="code" href="group__data.html#ga35cbd02038e7abf0be6da4cb2a34189e" title="Free an abstract data object.">nl_data_free</a>(f-&gt;cf_act);
<a name="l00108"></a>00108         <a class="code" href="group__data.html#ga35cbd02038e7abf0be6da4cb2a34189e" title="Free an abstract data object.">nl_data_free</a>(f-&gt;cf_police);
<a name="l00109"></a>00109 
<a name="l00110"></a>00110         free(cls-&gt;c_subdata);
<a name="l00111"></a>00111 }
<a name="l00112"></a>00112 
<a name="l00113"></a>00113 <span class="keyword">static</span> <span class="keywordtype">int</span> fw_clone(<span class="keyword">struct</span> rtnl_cls *_dst, <span class="keyword">struct</span> rtnl_cls *_src)
<a name="l00114"></a>00114 {
<a name="l00115"></a>00115         <span class="keyword">struct </span>rtnl_fw *dst, *src = fw_cls(_src);
<a name="l00116"></a>00116 
<a name="l00117"></a>00117         <span class="keywordflow">if</span> (!src)
<a name="l00118"></a>00118                 <span class="keywordflow">return</span> 0;
<a name="l00119"></a>00119 
<a name="l00120"></a>00120         dst = fw_alloc(_dst);
<a name="l00121"></a>00121         <span class="keywordflow">if</span> (!dst)
<a name="l00122"></a>00122                 <span class="keywordflow">return</span> nl_errno(ENOMEM);
<a name="l00123"></a>00123 
<a name="l00124"></a>00124         <span class="keywordflow">if</span> (src-&gt;cf_act)
<a name="l00125"></a>00125                 <span class="keywordflow">if</span> (!(dst-&gt;cf_act = <a class="code" href="group__data.html#ga64967fcb4916f66a2bd1a82292350e74" title="Clone an abstract data object.">nl_data_clone</a>(src-&gt;cf_act)))
<a name="l00126"></a>00126                         <span class="keywordflow">goto</span> errout;
<a name="l00127"></a>00127         
<a name="l00128"></a>00128         <span class="keywordflow">if</span> (src-&gt;cf_police)
<a name="l00129"></a>00129                 <span class="keywordflow">if</span> (!(dst-&gt;cf_police = <a class="code" href="group__data.html#ga64967fcb4916f66a2bd1a82292350e74" title="Clone an abstract data object.">nl_data_clone</a>(src-&gt;cf_police)))
<a name="l00130"></a>00130                         <span class="keywordflow">goto</span> errout;
<a name="l00131"></a>00131 
<a name="l00132"></a>00132         <span class="keywordflow">return</span> 0;
<a name="l00133"></a>00133 errout:
<a name="l00134"></a>00134         <span class="keywordflow">return</span> nl_get_errno();
<a name="l00135"></a>00135 }
<a name="l00136"></a>00136 
<a name="l00137"></a>00137 <span class="keyword">static</span> <span class="keywordtype">int</span> fw_dump_brief(<span class="keyword">struct</span> rtnl_cls *cls, <span class="keyword">struct</span> <a class="code" href="structnl__dump__params.html" title="Dumping parameters.">nl_dump_params</a> *p,
<a name="l00138"></a>00138                           <span class="keywordtype">int</span> line)
<a name="l00139"></a>00139 {
<a name="l00140"></a>00140         <span class="keyword">struct </span>rtnl_fw *f = fw_cls(cls);
<a name="l00141"></a>00141         <span class="keywordtype">char</span> buf[32];
<a name="l00142"></a>00142 
<a name="l00143"></a>00143         <span class="keywordflow">if</span> (!f)
<a name="l00144"></a>00144                 <span class="keywordflow">goto</span> ignore;
<a name="l00145"></a>00145 
<a name="l00146"></a>00146         <span class="keywordflow">if</span> (f-&gt;cf_mask &amp; FW_ATTR_CLASSID)
<a name="l00147"></a>00147                 dp_dump(p, <span class="stringliteral">&quot; target %s&quot;</span>,
<a name="l00148"></a>00148                         <a class="code" href="group__tc.html#ga27fad2a239d4d8d932da0ce1bdbf1f9f" title="Convert a traffic control handle to a character string (Reentrant).">rtnl_tc_handle2str</a>(f-&gt;cf_classid, buf, <span class="keyword">sizeof</span>(buf)));
<a name="l00149"></a>00149 
<a name="l00150"></a>00150 ignore:
<a name="l00151"></a>00151         <span class="keywordflow">return</span> line;
<a name="l00152"></a>00152 }
<a name="l00153"></a>00153 
<a name="l00154"></a>00154 <span class="keyword">static</span> <span class="keywordtype">int</span> fw_dump_full(<span class="keyword">struct</span> rtnl_cls *cls, <span class="keyword">struct</span> <a class="code" href="structnl__dump__params.html" title="Dumping parameters.">nl_dump_params</a> *p,
<a name="l00155"></a>00155                          <span class="keywordtype">int</span> line)
<a name="l00156"></a>00156 {
<a name="l00157"></a>00157         <span class="keyword">struct </span>rtnl_fw *f = fw_cls(cls);
<a name="l00158"></a>00158 
<a name="l00159"></a>00159         <span class="keywordflow">if</span> (!f)
<a name="l00160"></a>00160                 <span class="keywordflow">goto</span> ignore;
<a name="l00161"></a>00161 
<a name="l00162"></a>00162         <span class="keywordflow">if</span> (f-&gt;cf_mask &amp; FW_ATTR_INDEV)
<a name="l00163"></a>00163                 dp_dump(p, <span class="stringliteral">&quot;indev %s &quot;</span>, f-&gt;cf_indev);
<a name="l00164"></a>00164 
<a name="l00165"></a>00165 ignore:
<a name="l00166"></a>00166         <span class="keywordflow">return</span> line;
<a name="l00167"></a>00167 }
<a name="l00168"></a>00168 
<a name="l00169"></a>00169 <span class="keyword">static</span> <span class="keywordtype">int</span> fw_dump_stats(<span class="keyword">struct</span> rtnl_cls *cls, <span class="keyword">struct</span> <a class="code" href="structnl__dump__params.html" title="Dumping parameters.">nl_dump_params</a> *p,
<a name="l00170"></a>00170                           <span class="keywordtype">int</span> line)
<a name="l00171"></a>00171 {
<a name="l00172"></a>00172         <span class="keyword">struct </span>rtnl_fw *f = fw_cls(cls);
<a name="l00173"></a>00173 
<a name="l00174"></a>00174         <span class="keywordflow">if</span> (!f)
<a name="l00175"></a>00175                 <span class="keywordflow">goto</span> ignore;
<a name="l00176"></a>00176 
<a name="l00177"></a>00177 ignore:
<a name="l00178"></a>00178         <span class="keywordflow">return</span> line;
<a name="l00179"></a>00179 }
<a name="l00180"></a>00180 
<a name="l00181"></a>00181 <span class="keyword">static</span> <span class="keyword">struct </span>nl_msg *fw_get_opts(<span class="keyword">struct</span> rtnl_cls *cls)
<a name="l00182"></a>00182 {
<a name="l00183"></a>00183         <span class="keyword">struct </span>rtnl_fw *f;
<a name="l00184"></a>00184         <span class="keyword">struct </span>nl_msg *msg;
<a name="l00185"></a>00185         
<a name="l00186"></a>00186         f = fw_cls(cls);
<a name="l00187"></a>00187         <span class="keywordflow">if</span> (!f)
<a name="l00188"></a>00188                 <span class="keywordflow">return</span> NULL;
<a name="l00189"></a>00189 
<a name="l00190"></a>00190         msg = <a class="code" href="group__msg.html#ga89c936bdf5e73455bb1640a0eb8a020d" title="Allocate a new netlink message with the default maximum payload size.">nlmsg_alloc</a>();
<a name="l00191"></a>00191         <span class="keywordflow">if</span> (!msg)
<a name="l00192"></a>00192                 <span class="keywordflow">return</span> NULL;
<a name="l00193"></a>00193 
<a name="l00194"></a>00194         <span class="keywordflow">if</span> (f-&gt;cf_mask &amp; FW_ATTR_CLASSID)
<a name="l00195"></a>00195                 <a class="code" href="group__attr.html#ga9891f766dcebe6bdb2ce86f021c6f6e6" title="Add a u32 netlink attribute to a netlink message.">nla_put_u32</a>(msg, TCA_FW_CLASSID, f-&gt;cf_classid);
<a name="l00196"></a>00196 
<a name="l00197"></a>00197         <span class="keywordflow">if</span> (f-&gt;cf_mask &amp; FW_ATTR_ACTION)
<a name="l00198"></a>00198                 <a class="code" href="group__attr.html#gad07458aa26ae9a430fb9ff8d444b526d" title="Add an abstract data netlink attribute to a netlink message.">nla_put_data</a>(msg, TCA_FW_ACT, f-&gt;cf_act);
<a name="l00199"></a>00199 
<a name="l00200"></a>00200         <span class="keywordflow">if</span> (f-&gt;cf_mask &amp; FW_ATTR_POLICE)
<a name="l00201"></a>00201                 <a class="code" href="group__attr.html#gad07458aa26ae9a430fb9ff8d444b526d" title="Add an abstract data netlink attribute to a netlink message.">nla_put_data</a>(msg, TCA_FW_POLICE, f-&gt;cf_police);
<a name="l00202"></a>00202 
<a name="l00203"></a>00203         <span class="keywordflow">if</span> (f-&gt;cf_mask &amp; FW_ATTR_INDEV)
<a name="l00204"></a>00204                 <a class="code" href="group__attr.html#gacf85c1c8becd42e29f03670553b6e2f3" title="Add a string netlink attribute to a netlink message.">nla_put_string</a>(msg, TCA_FW_INDEV, f-&gt;cf_indev);
<a name="l00205"></a>00205 
<a name="l00206"></a>00206         <span class="keywordflow">return</span> msg;
<a name="l00207"></a>00207 }
<a name="l00208"></a>00208 <span class="comment"></span>
<a name="l00209"></a>00209 <span class="comment">/**</span>
<a name="l00210"></a>00210 <span class="comment"> * @name Attribute Modifications</span>
<a name="l00211"></a>00211 <span class="comment"> * @{</span>
<a name="l00212"></a>00212 <span class="comment"> */</span>
<a name="l00213"></a>00213 
<a name="l00214"></a>00214 <span class="keywordtype">int</span> rtnl_fw_set_classid(<span class="keyword">struct</span> rtnl_cls *cls, uint32_t classid)
<a name="l00215"></a>00215 {
<a name="l00216"></a>00216         <span class="keyword">struct </span>rtnl_fw *f;
<a name="l00217"></a>00217         
<a name="l00218"></a>00218         f = fw_alloc(cls);
<a name="l00219"></a>00219         <span class="keywordflow">if</span> (!f)
<a name="l00220"></a>00220                 <span class="keywordflow">return</span> nl_errno(ENOMEM);
<a name="l00221"></a>00221 
<a name="l00222"></a>00222         f-&gt;cf_classid = classid;
<a name="l00223"></a>00223         f-&gt;cf_mask |= FW_ATTR_CLASSID;
<a name="l00224"></a>00224 
<a name="l00225"></a>00225         <span class="keywordflow">return</span> 0;
<a name="l00226"></a>00226 }
<a name="l00227"></a>00227 <span class="comment"></span>
<a name="l00228"></a>00228 <span class="comment">/** @} */</span>
<a name="l00229"></a>00229 
<a name="l00230"></a>00230 <span class="keyword">static</span> <span class="keyword">struct </span><a class="code" href="structrtnl__cls__ops.html" title="Classifier operations.">rtnl_cls_ops</a> fw_ops = {
<a name="l00231"></a>00231         .<a class="code" href="structrtnl__cls__ops.html#aefa372f798d154453883161cc7bd1b80" title="Kind/Name of classifier.">co_kind</a>                = <span class="stringliteral">&quot;fw&quot;</span>,
<a name="l00232"></a>00232         .co_msg_parser          = fw_msg_parser,
<a name="l00233"></a>00233         .co_free_data           = fw_free_data,
<a name="l00234"></a>00234         .co_clone               = fw_clone,
<a name="l00235"></a>00235         .co_get_opts            = fw_get_opts,
<a name="l00236"></a>00236         .co_dump[<a class="code" href="group__utils.html#ggacfb5566c73f0965c5241d7d49bc717e9a5597887c080d5ecae358b6065a4048fd" title="Dump object in a brief one-liner.">NL_DUMP_BRIEF</a>] = fw_dump_brief,
<a name="l00237"></a>00237         .co_dump[<a class="code" href="group__utils.html#ggacfb5566c73f0965c5241d7d49bc717e9a1445106c7af529b2c99ee289fbcd3179" title="Dump all attributes but no statistics.">NL_DUMP_FULL</a>]  = fw_dump_full,
<a name="l00238"></a>00238         .co_dump[<a class="code" href="group__utils.html#ggacfb5566c73f0965c5241d7d49bc717e9a8ebedc55094df6175b84fb1230047a65" title="Dump all attributes including statistics.">NL_DUMP_STATS</a>] = fw_dump_stats,
<a name="l00239"></a>00239 };
<a name="l00240"></a>00240 
<a name="l00241"></a>00241 <span class="keyword">static</span> <span class="keywordtype">void</span> __init fw_init(<span class="keywordtype">void</span>)
<a name="l00242"></a>00242 {
<a name="l00243"></a>00243         <a class="code" href="group__cls__api.html#ga9cfec6c1566e00f9ca77cce6839dbc41" title="Register a classifier module.">rtnl_cls_register</a>(&amp;fw_ops);
<a name="l00244"></a>00244 }
<a name="l00245"></a>00245 
<a name="l00246"></a>00246 <span class="keyword">static</span> <span class="keywordtype">void</span> __exit fw_exit(<span class="keywordtype">void</span>)
<a name="l00247"></a>00247 {
<a name="l00248"></a>00248         <a class="code" href="group__cls__api.html#ga271e9fdd32cfffd6b5f4c9c53db8e0da" title="Unregister a classifier module.">rtnl_cls_unregister</a>(&amp;fw_ops);
<a name="l00249"></a>00249 }
<a name="l00250"></a>00250 <span class="comment"></span>
<a name="l00251"></a>00251 <span class="comment">/** @} */</span>
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