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<h1>lib/route/classifier.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/classifier.c 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 <tgraf@suug.ch></span>
<a name="l00010"></a>00010 <span class="comment"> */</span>
<a name="l00011"></a>00011 <span class="comment"></span>
<a name="l00012"></a>00012 <span class="comment">/**</span>
<a name="l00013"></a>00013 <span class="comment"> * @ingroup tc</span>
<a name="l00014"></a>00014 <span class="comment"> * @defgroup cls Classifiers</span>
<a name="l00015"></a>00015 <span class="comment"> *</span>
<a name="l00016"></a>00016 <span class="comment"> * @par Classifier Identification</span>
<a name="l00017"></a>00017 <span class="comment"> * - protocol</span>
<a name="l00018"></a>00018 <span class="comment"> * - priority</span>
<a name="l00019"></a>00019 <span class="comment"> * - parent</span>
<a name="l00020"></a>00020 <span class="comment"> * - interface</span>
<a name="l00021"></a>00021 <span class="comment"> * - kind</span>
<a name="l00022"></a>00022 <span class="comment"> * - handle</span>
<a name="l00023"></a>00023 <span class="comment"> * </span>
<a name="l00024"></a>00024 <span class="comment"> * @{</span>
<a name="l00025"></a>00025 <span class="comment"> */</span>
<a name="l00026"></a>00026
<a name="l00027"></a>00027 <span class="preprocessor">#include <netlink-local.h></span>
<a name="l00028"></a>00028 <span class="preprocessor">#include <netlink-tc.h></span>
<a name="l00029"></a>00029 <span class="preprocessor">#include <netlink/netlink.h></span>
<a name="l00030"></a>00030 <span class="preprocessor">#include <netlink/utils.h></span>
<a name="l00031"></a>00031 <span class="preprocessor">#include <netlink/route/tc.h></span>
<a name="l00032"></a>00032 <span class="preprocessor">#include <netlink/route/classifier.h></span>
<a name="l00033"></a>00033 <span class="preprocessor">#include <netlink/route/classifier-modules.h></span>
<a name="l00034"></a>00034 <span class="preprocessor">#include <netlink/route/link.h></span>
<a name="l00035"></a>00035
<a name="l00036"></a>00036 <span class="keyword">static</span> <span class="keyword">struct </span><a class="code" href="structnl__cache__ops.html" title="Cache Operations.">nl_cache_ops</a> <a class="code" href="structrtnl__cls__ops.html" title="Classifier operations.">rtnl_cls_ops</a>;
<a name="l00037"></a>00037
<a name="l00038"></a>00038 <span class="keyword">static</span> <span class="keywordtype">int</span> cls_msg_parser(<span class="keyword">struct</span> <a class="code" href="structnl__cache__ops.html" title="Cache Operations.">nl_cache_ops</a> *ops, <span class="keyword">struct</span> <a class="code" href="structsockaddr__nl.html" title="Netlink socket address.">sockaddr_nl</a> *who,
<a name="l00039"></a>00039 <span class="keyword">struct</span> <a class="code" href="structnlmsghdr.html" title="Netlink message header.">nlmsghdr</a> *nlh, <span class="keyword">struct</span> <a class="code" href="structnl__parser__param.html">nl_parser_param</a> *pp)
<a name="l00040"></a>00040 {
<a name="l00041"></a>00041 <span class="keywordtype">int</span> err;
<a name="l00042"></a>00042 <span class="keyword">struct </span>rtnl_cls *cls;
<a name="l00043"></a>00043 <span class="keyword">struct </span><a class="code" href="structrtnl__cls__ops.html" title="Classifier operations.">rtnl_cls_ops</a> *cops;
<a name="l00044"></a>00044
<a name="l00045"></a>00045 cls = rtnl_cls_alloc();
<a name="l00046"></a>00046 <span class="keywordflow">if</span> (!cls) {
<a name="l00047"></a>00047 err = nl_errno(ENOMEM);
<a name="l00048"></a>00048 <span class="keywordflow">goto</span> errout;
<a name="l00049"></a>00049 }
<a name="l00050"></a>00050 cls->ce_msgtype = nlh-><a class="code" href="structnlmsghdr.html#a7232c4e6cb513010e64887b7eebf8823" title="Message type (content type)">nlmsg_type</a>;
<a name="l00051"></a>00051
<a name="l00052"></a>00052 err = tca_msg_parser(nlh, (<span class="keyword">struct</span> rtnl_tca *) cls);
<a name="l00053"></a>00053 <span class="keywordflow">if</span> (err < 0)
<a name="l00054"></a>00054 <span class="keywordflow">goto</span> errout_free;
<a name="l00055"></a>00055
<a name="l00056"></a>00056 cls->c_prio = TC_H_MAJ(cls->c_info) >> 16;
<a name="l00057"></a>00057 cls->c_protocol = ntohs(TC_H_MIN(cls->c_info));
<a name="l00058"></a>00058
<a name="l00059"></a>00059 cops = <a class="code" href="group__cls__api.html#ga186a8b0848c2662a7abe4d742d7ec008" title="Lookup classifier operations for a classifier object.">rtnl_cls_lookup_ops</a>(cls);
<a name="l00060"></a>00060 <span class="keywordflow">if</span> (cops && cops-><a class="code" href="structrtnl__cls__ops.html#a768d32befb2951d78ac5134a9014e786" title="TCA_OPTIONS message parser.">co_msg_parser</a>) {
<a name="l00061"></a>00061 err = cops-><a class="code" href="structrtnl__cls__ops.html#a768d32befb2951d78ac5134a9014e786" title="TCA_OPTIONS message parser.">co_msg_parser</a>(cls);
<a name="l00062"></a>00062 <span class="keywordflow">if</span> (err < 0)
<a name="l00063"></a>00063 <span class="keywordflow">goto</span> errout_free;
<a name="l00064"></a>00064 }
<a name="l00065"></a>00065
<a name="l00066"></a>00066 err = pp->pp_cb((<span class="keyword">struct</span> nl_object *) cls, pp);
<a name="l00067"></a>00067 <span class="keywordflow">if</span> (err < 0)
<a name="l00068"></a>00068 <span class="keywordflow">goto</span> errout_free;
<a name="l00069"></a>00069
<a name="l00070"></a>00070 err = P_ACCEPT;
<a name="l00071"></a>00071
<a name="l00072"></a>00072 errout_free:
<a name="l00073"></a>00073 rtnl_cls_put(cls);
<a name="l00074"></a>00074 errout:
<a name="l00075"></a>00075 <span class="keywordflow">return</span> err;
<a name="l00076"></a>00076 }
<a name="l00077"></a>00077
<a name="l00078"></a>00078 <span class="keyword">static</span> <span class="keywordtype">int</span> cls_request_update(<span class="keyword">struct</span> nl_cache *cache, <span class="keyword">struct</span> nl_handle *handle)
<a name="l00079"></a>00079 {
<a name="l00080"></a>00080 <span class="keyword">struct </span>tcmsg tchdr = {
<a name="l00081"></a>00081 .tcm_family = AF_UNSPEC,
<a name="l00082"></a>00082 .tcm_ifindex = cache->c_iarg1,
<a name="l00083"></a>00083 .tcm_parent = cache->c_iarg2,
<a name="l00084"></a>00084 };
<a name="l00085"></a>00085
<a name="l00086"></a>00086 <span class="keywordflow">return</span> <a class="code" href="group__nl.html#ga73ed88a505f2d67bcf328183fe1e692a" title="Send simple netlink message using nl_send_auto_complete()">nl_send_simple</a>(handle, RTM_GETTFILTER, <a class="code" href="group__msg.html#ga8d4fb2458c013decb6673f41c52c07b1" title="Dump all entries.">NLM_F_DUMP</a>, &tchdr,
<a name="l00087"></a>00087 <span class="keyword">sizeof</span>(tchdr));
<a name="l00088"></a>00088 }
<a name="l00089"></a>00089
<a name="l00090"></a>00090
<a name="l00091"></a>00091 <span class="keyword">static</span> <span class="keyword">struct </span>nl_msg *cls_build(<span class="keyword">struct</span> rtnl_cls *cls, <span class="keywordtype">int</span> type, <span class="keywordtype">int</span> flags)
<a name="l00092"></a>00092 {
<a name="l00093"></a>00093 <span class="keyword">struct </span>nl_msg *msg;
<a name="l00094"></a>00094 <span class="keyword">struct </span><a class="code" href="structrtnl__cls__ops.html" title="Classifier operations.">rtnl_cls_ops</a> *cops;
<a name="l00095"></a>00095 <span class="keywordtype">int</span> err, prio, proto;
<a name="l00096"></a>00096 <span class="keyword">struct </span>tcmsg *tchdr;
<a name="l00097"></a>00097
<a name="l00098"></a>00098 msg = tca_build_msg((<span class="keyword">struct</span> rtnl_tca *) cls, type, flags);
<a name="l00099"></a>00099 <span class="keywordflow">if</span> (!msg)
<a name="l00100"></a>00100 <span class="keywordflow">goto</span> errout;
<a name="l00101"></a>00101
<a name="l00102"></a>00102 tchdr = <a class="code" href="group__msg.html#gae44a904bb40c8b5f5ff31539c21cfa5a" title="head of message payload">nlmsg_data</a>(<a class="code" href="group__msg.html#gaa5f29579d86d2bdab26c312b44b56de7" title="Return actual netlink message.">nlmsg_hdr</a>(msg));
<a name="l00103"></a>00103 prio = rtnl_cls_get_prio(cls);
<a name="l00104"></a>00104 proto = rtnl_cls_get_protocol(cls);
<a name="l00105"></a>00105 tchdr->tcm_info = TC_H_MAKE(prio << 16, htons(proto)),
<a name="l00106"></a>00106
<a name="l00107"></a>00107 cops = <a class="code" href="group__cls__api.html#ga186a8b0848c2662a7abe4d742d7ec008" title="Lookup classifier operations for a classifier object.">rtnl_cls_lookup_ops</a>(cls);
<a name="l00108"></a>00108 <span class="keywordflow">if</span> (cops && cops-><a class="code" href="structrtnl__cls__ops.html#a74d2c670b80f28606828573f2d233cd6" title="Must return the contents supposed to be in TCA_OPTIONS.">co_get_opts</a>) {
<a name="l00109"></a>00109 <span class="keyword">struct </span>nl_msg *opts;
<a name="l00110"></a>00110
<a name="l00111"></a>00111 opts = cops-><a class="code" href="structrtnl__cls__ops.html#a74d2c670b80f28606828573f2d233cd6" title="Must return the contents supposed to be in TCA_OPTIONS.">co_get_opts</a>(cls);
<a name="l00112"></a>00112 <span class="keywordflow">if</span> (opts) {
<a name="l00113"></a>00113 err = <a class="code" href="group__attr.html#gafe7bad603c92ecee0dfc0cc112dd1182" title="Add a nested netlink attribute to a netlink message.">nla_put_nested</a>(msg, TCA_OPTIONS, opts);
<a name="l00114"></a>00114 <a class="code" href="group__msg.html#ga138ba9bee70553f9fbe7143deacad48c" title="Free a netlink message.">nlmsg_free</a>(opts);
<a name="l00115"></a>00115 <span class="keywordflow">if</span> (err < 0)
<a name="l00116"></a>00116 <span class="keywordflow">goto</span> errout;
<a name="l00117"></a>00117 }
<a name="l00118"></a>00118 }
<a name="l00119"></a>00119
<a name="l00120"></a>00120 <span class="keywordflow">return</span> msg;
<a name="l00121"></a>00121 errout:
<a name="l00122"></a>00122 <a class="code" href="group__msg.html#ga138ba9bee70553f9fbe7143deacad48c" title="Free a netlink message.">nlmsg_free</a>(msg);
<a name="l00123"></a>00123 <span class="keywordflow">return</span> NULL;
<a name="l00124"></a>00124 }
<a name="l00125"></a>00125 <span class="comment"></span>
<a name="l00126"></a>00126 <span class="comment">/**</span>
<a name="l00127"></a>00127 <span class="comment"> * @name Classifier Addition/Modification/Deletion</span>
<a name="l00128"></a>00128 <span class="comment"> * @{</span>
<a name="l00129"></a>00129 <span class="comment"> */</span>
<a name="l00130"></a>00130 <span class="comment"></span>
<a name="l00131"></a>00131 <span class="comment">/**</span>
<a name="l00132"></a>00132 <span class="comment"> * Build a netlink message to add a new classifier</span>
<a name="l00133"></a>00133 <span class="comment"> * @arg cls classifier to add</span>
<a name="l00134"></a>00134 <span class="comment"> * @arg flags additional netlink message flags</span>
<a name="l00135"></a>00135 <span class="comment"> *</span>
<a name="l00136"></a>00136 <span class="comment"> * Builds a new netlink message requesting an addition of a classifier</span>
<a name="l00137"></a>00137 <span class="comment"> * The netlink message header isn't fully equipped with all relevant</span>
<a name="l00138"></a>00138 <span class="comment"> * fields and must be sent out via nl_send_auto_complete() or</span>
<a name="l00139"></a>00139 <span class="comment"> * supplemented as needed. \a classifier must contain the attributes of</span>
<a name="l00140"></a>00140 <span class="comment"> * the new classifier set via \c rtnl_cls_set_* functions. \a opts</span>
<a name="l00141"></a>00141 <span class="comment"> * may point to the clsasifier specific options.</span>
<a name="l00142"></a>00142 <span class="comment"> *</span>
<a name="l00143"></a>00143 <span class="comment"> * @return New netlink message</span>
<a name="l00144"></a>00144 <span class="comment"> */</span>
<a name="l00145"></a><a class="code" href="group__cls.html#ga17688ff077ad56f9f4844a2462197e25">00145</a> <span class="keyword">struct </span>nl_msg * <a class="code" href="group__cls.html#ga17688ff077ad56f9f4844a2462197e25" title="Build a netlink message to add a new classifier.">rtnl_cls_build_add_request</a>(<span class="keyword">struct</span> rtnl_cls *cls, <span class="keywordtype">int</span> flags)
<a name="l00146"></a>00146 {
<a name="l00147"></a>00147 <span class="keywordflow">return</span> cls_build(cls, RTM_NEWTFILTER, <a class="code" href="group__msg.html#ga20a00ae52e4c150f54649d7346d23a7a" title="Create config object if it doesn&#39;t already exist.">NLM_F_CREATE</a> | flags);
<a name="l00148"></a>00148 }
<a name="l00149"></a>00149 <span class="comment"></span>
<a name="l00150"></a>00150 <span class="comment">/**</span>
<a name="l00151"></a>00151 <span class="comment"> * Add a new classifier</span>
<a name="l00152"></a>00152 <span class="comment"> * @arg handle netlink handle</span>
<a name="l00153"></a>00153 <span class="comment"> * @arg cls classifier to add</span>
<a name="l00154"></a>00154 <span class="comment"> * @arg flags additional netlink message flags</span>
<a name="l00155"></a>00155 <span class="comment"> *</span>
<a name="l00156"></a>00156 <span class="comment"> * Builds a netlink message by calling rtnl_cls_build_add_request(),</span>
<a name="l00157"></a>00157 <span class="comment"> * sends the request to the kernel and waits for the next ACK to be</span>
<a name="l00158"></a>00158 <span class="comment"> * received and thus blocks until the request has been processed.</span>
<a name="l00159"></a>00159 <span class="comment"> *</span>
<a name="l00160"></a>00160 <span class="comment"> * @return 0 on sucess or a negative error if an error occured.</span>
<a name="l00161"></a>00161 <span class="comment"> */</span>
<a name="l00162"></a><a class="code" href="group__cls.html#gaaab27ed49b8a963959560e0fc18c9bfb">00162</a> <span class="keywordtype">int</span> <a class="code" href="group__cls.html#gaaab27ed49b8a963959560e0fc18c9bfb" title="Add a new classifier.">rtnl_cls_add</a>(<span class="keyword">struct</span> nl_handle *handle, <span class="keyword">struct</span> rtnl_cls *cls, <span class="keywordtype">int</span> flags)
<a name="l00163"></a>00163 {
<a name="l00164"></a>00164 <span class="keywordtype">int</span> err;
<a name="l00165"></a>00165 <span class="keyword">struct </span>nl_msg *msg;
<a name="l00166"></a>00166
<a name="l00167"></a>00167 msg = <a class="code" href="group__cls.html#ga17688ff077ad56f9f4844a2462197e25" title="Build a netlink message to add a new classifier.">rtnl_cls_build_add_request</a>(cls, flags);
<a name="l00168"></a>00168 <span class="keywordflow">if</span> (!msg)
<a name="l00169"></a>00169 <span class="keywordflow">return</span> nl_errno(ENOMEM);
<a name="l00170"></a>00170
<a name="l00171"></a>00171 err = <a class="code" href="group__nl.html#ga01a2aad82350f867e704d5c696438b60" title="Send netlink message and check &amp; extend header values as needed.">nl_send_auto_complete</a>(handle, msg);
<a name="l00172"></a>00172 <span class="keywordflow">if</span> (err < 0)
<a name="l00173"></a>00173 <span class="keywordflow">return</span> err;
<a name="l00174"></a>00174
<a name="l00175"></a>00175 <a class="code" href="group__msg.html#ga138ba9bee70553f9fbe7143deacad48c" title="Free a netlink message.">nlmsg_free</a>(msg);
<a name="l00176"></a>00176 <span class="keywordflow">return</span> <a class="code" href="group__nl.html#gaa65fec588e0a0a2de1881fb8366ccd79" title="Wait for ACK.">nl_wait_for_ack</a>(handle);
<a name="l00177"></a>00177 }
<a name="l00178"></a>00178 <span class="comment"></span>
<a name="l00179"></a>00179 <span class="comment">/**</span>
<a name="l00180"></a>00180 <span class="comment"> * Build a netlink message to change classifier attributes</span>
<a name="l00181"></a>00181 <span class="comment"> * @arg cls classifier to change</span>
<a name="l00182"></a>00182 <span class="comment"> * @arg flags additional netlink message flags</span>
<a name="l00183"></a>00183 <span class="comment"> *</span>
<a name="l00184"></a>00184 <span class="comment"> * Builds a new netlink message requesting a change of a neigh</span>
<a name="l00185"></a>00185 <span class="comment"> * attributes. The netlink message header isn't fully equipped with</span>
<a name="l00186"></a>00186 <span class="comment"> * all relevant fields and must thus be sent out via nl_send_auto_complete()</span>
<a name="l00187"></a>00187 <span class="comment"> * or supplemented as needed.</span>
<a name="l00188"></a>00188 <span class="comment"> *</span>
<a name="l00189"></a>00189 <span class="comment"> * @return The netlink message</span>
<a name="l00190"></a>00190 <span class="comment"> */</span>
<a name="l00191"></a><a class="code" href="group__cls.html#ga5336b8905fbac0950aebc65873b5a1fa">00191</a> <span class="keyword">struct </span>nl_msg *<a class="code" href="group__cls.html#ga5336b8905fbac0950aebc65873b5a1fa" title="Build a netlink message to change classifier attributes.">rtnl_cls_build_change_request</a>(<span class="keyword">struct</span> rtnl_cls *cls, <span class="keywordtype">int</span> flags)
<a name="l00192"></a>00192 {
<a name="l00193"></a>00193 <span class="keywordflow">return</span> cls_build(cls, RTM_NEWTFILTER, <a class="code" href="group__msg.html#ga508feb1b826c0b8f6b2487c682ddb734" title="Replace existing matching config object with this request.">NLM_F_REPLACE</a> | flags);
<a name="l00194"></a>00194 }
<a name="l00195"></a>00195 <span class="comment"></span>
<a name="l00196"></a>00196 <span class="comment">/**</span>
<a name="l00197"></a>00197 <span class="comment"> * Change a classifier</span>
<a name="l00198"></a>00198 <span class="comment"> * @arg handle netlink handle</span>
<a name="l00199"></a>00199 <span class="comment"> * @arg cls classifier to change</span>
<a name="l00200"></a>00200 <span class="comment"> * @arg flags additional netlink message flags</span>
<a name="l00201"></a>00201 <span class="comment"> *</span>
<a name="l00202"></a>00202 <span class="comment"> * Builds a netlink message by calling rtnl_cls_build_change_request(),</span>
<a name="l00203"></a>00203 <span class="comment"> * sends the request to the kernel and waits for the next ACK to be</span>
<a name="l00204"></a>00204 <span class="comment"> * received and thus blocks until the request has been processed.</span>
<a name="l00205"></a>00205 <span class="comment"> *</span>
<a name="l00206"></a>00206 <span class="comment"> * @return 0 on sucess or a negative error if an error occured.</span>
<a name="l00207"></a>00207 <span class="comment"> */</span>
<a name="l00208"></a><a class="code" href="group__cls.html#ga8a976d764e10be75d3521a1dac4db16b">00208</a> <span class="keywordtype">int</span> <a class="code" href="group__cls.html#ga8a976d764e10be75d3521a1dac4db16b" title="Change a classifier.">rtnl_cls_change</a>(<span class="keyword">struct</span> nl_handle *handle, <span class="keyword">struct</span> rtnl_cls *cls,
<a name="l00209"></a>00209 <span class="keywordtype">int</span> flags)
<a name="l00210"></a>00210 {
<a name="l00211"></a>00211 <span class="keywordtype">int</span> err;
<a name="l00212"></a>00212 <span class="keyword">struct </span>nl_msg *msg;
<a name="l00213"></a>00213
<a name="l00214"></a>00214 msg = <a class="code" href="group__cls.html#ga5336b8905fbac0950aebc65873b5a1fa" title="Build a netlink message to change classifier attributes.">rtnl_cls_build_change_request</a>(cls, flags);
<a name="l00215"></a>00215 <span class="keywordflow">if</span> (!msg)
<a name="l00216"></a>00216 <span class="keywordflow">return</span> nl_errno(ENOMEM);
<a name="l00217"></a>00217
<a name="l00218"></a>00218 err = <a class="code" href="group__nl.html#ga01a2aad82350f867e704d5c696438b60" title="Send netlink message and check &amp; extend header values as needed.">nl_send_auto_complete</a>(handle, msg);
<a name="l00219"></a>00219 <span class="keywordflow">if</span> (err < 0)
<a name="l00220"></a>00220 <span class="keywordflow">return</span> err;
<a name="l00221"></a>00221
<a name="l00222"></a>00222 <a class="code" href="group__msg.html#ga138ba9bee70553f9fbe7143deacad48c" title="Free a netlink message.">nlmsg_free</a>(msg);
<a name="l00223"></a>00223 <span class="keywordflow">return</span> <a class="code" href="group__nl.html#gaa65fec588e0a0a2de1881fb8366ccd79" title="Wait for ACK.">nl_wait_for_ack</a>(handle);
<a name="l00224"></a>00224 }
<a name="l00225"></a>00225 <span class="comment"></span>
<a name="l00226"></a>00226 <span class="comment">/**</span>
<a name="l00227"></a>00227 <span class="comment"> * Build a netlink request message to delete a classifier</span>
<a name="l00228"></a>00228 <span class="comment"> * @arg cls classifier to delete</span>
<a name="l00229"></a>00229 <span class="comment"> * @arg flags additional netlink message flags</span>
<a name="l00230"></a>00230 <span class="comment"> *</span>
<a name="l00231"></a>00231 <span class="comment"> * Builds a new netlink message requesting a deletion of a classifier.</span>
<a name="l00232"></a>00232 <span class="comment"> * The netlink message header isn't fully equipped with all relevant</span>
<a name="l00233"></a>00233 <span class="comment"> * fields and must thus be sent out via nl_send_auto_complete()</span>
<a name="l00234"></a>00234 <span class="comment"> * or supplemented as needed.</span>
<a name="l00235"></a>00235 <span class="comment"> *</span>
<a name="l00236"></a>00236 <span class="comment"> * @return New netlink message</span>
<a name="l00237"></a>00237 <span class="comment"> */</span>
<a name="l00238"></a><a class="code" href="group__cls.html#ga1845d413ecb99e01f9a961998a0e2a0d">00238</a> <span class="keyword">struct </span>nl_msg *<a class="code" href="group__cls.html#ga1845d413ecb99e01f9a961998a0e2a0d" title="Build a netlink request message to delete a classifier.">rtnl_cls_build_delete_request</a>(<span class="keyword">struct</span> rtnl_cls *cls, <span class="keywordtype">int</span> flags)
<a name="l00239"></a>00239 {
<a name="l00240"></a>00240 <span class="keywordflow">return</span> cls_build(cls, RTM_DELTFILTER, flags);
<a name="l00241"></a>00241 }
<a name="l00242"></a>00242
<a name="l00243"></a>00243 <span class="comment"></span>
<a name="l00244"></a>00244 <span class="comment">/**</span>
<a name="l00245"></a>00245 <span class="comment"> * Delete a classifier</span>
<a name="l00246"></a>00246 <span class="comment"> * @arg handle netlink handle</span>
<a name="l00247"></a>00247 <span class="comment"> * @arg cls classifier to delete</span>
<a name="l00248"></a>00248 <span class="comment"> * @arg flags additional netlink message flags</span>
<a name="l00249"></a>00249 <span class="comment"> *</span>
<a name="l00250"></a>00250 <span class="comment"> * Builds a netlink message by calling rtnl_cls_build_delete_request(),</span>
<a name="l00251"></a>00251 <span class="comment"> * sends the request to the kernel and waits for the next ACK to be</span>
<a name="l00252"></a>00252 <span class="comment"> * received and thus blocks until the request has been processed.</span>
<a name="l00253"></a>00253 <span class="comment"> *</span>
<a name="l00254"></a>00254 <span class="comment"> * @return 0 on sucess or a negative error if an error occured.</span>
<a name="l00255"></a>00255 <span class="comment"> */</span>
<a name="l00256"></a><a class="code" href="group__cls.html#gaec185185471f89fe3aeee449edd86b63">00256</a> <span class="keywordtype">int</span> <a class="code" href="group__cls.html#gaec185185471f89fe3aeee449edd86b63" title="Delete a classifier.">rtnl_cls_delete</a>(<span class="keyword">struct</span> nl_handle *handle, <span class="keyword">struct</span> rtnl_cls *cls, <span class="keywordtype">int</span> flags)
<a name="l00257"></a>00257 {
<a name="l00258"></a>00258 <span class="keywordtype">int</span> err;
<a name="l00259"></a>00259 <span class="keyword">struct </span>nl_msg *msg;
<a name="l00260"></a>00260
<a name="l00261"></a>00261 msg = <a class="code" href="group__cls.html#ga1845d413ecb99e01f9a961998a0e2a0d" title="Build a netlink request message to delete a classifier.">rtnl_cls_build_delete_request</a>(cls, flags);
<a name="l00262"></a>00262 <span class="keywordflow">if</span> (!msg)
<a name="l00263"></a>00263 <span class="keywordflow">return</span> nl_errno(ENOMEM);
<a name="l00264"></a>00264
<a name="l00265"></a>00265 err = <a class="code" href="group__nl.html#ga01a2aad82350f867e704d5c696438b60" title="Send netlink message and check &amp; extend header values as needed.">nl_send_auto_complete</a>(handle, msg);
<a name="l00266"></a>00266 <span class="keywordflow">if</span> (err < 0)
<a name="l00267"></a>00267 <span class="keywordflow">return</span> err;
<a name="l00268"></a>00268
<a name="l00269"></a>00269 <a class="code" href="group__msg.html#ga138ba9bee70553f9fbe7143deacad48c" title="Free a netlink message.">nlmsg_free</a>(msg);
<a name="l00270"></a>00270 <span class="keywordflow">return</span> <a class="code" href="group__nl.html#gaa65fec588e0a0a2de1881fb8366ccd79" title="Wait for ACK.">nl_wait_for_ack</a>(handle);
<a name="l00271"></a>00271 }
<a name="l00272"></a>00272 <span class="comment"></span>
<a name="l00273"></a>00273 <span class="comment">/** @} */</span>
<a name="l00274"></a>00274 <span class="comment"></span>
<a name="l00275"></a>00275 <span class="comment">/**</span>
<a name="l00276"></a>00276 <span class="comment"> * @name Cache Management</span>
<a name="l00277"></a>00277 <span class="comment"> * @{</span>
<a name="l00278"></a>00278 <span class="comment"> */</span>
<a name="l00279"></a>00279 <span class="comment"></span>
<a name="l00280"></a>00280 <span class="comment">/**</span>
<a name="l00281"></a>00281 <span class="comment"> * Build a classifier cache including all classifiers attached to the</span>
<a name="l00282"></a>00282 <span class="comment"> * specified class/qdisc on eht specified interface.</span>
<a name="l00283"></a>00283 <span class="comment"> * @arg handle netlink handle</span>
<a name="l00284"></a>00284 <span class="comment"> * @arg ifindex interface index of the link the classes are</span>
<a name="l00285"></a>00285 <span class="comment"> * attached to.</span>
<a name="l00286"></a>00286 <span class="comment"> * @arg parent parent qdisc/class</span>
<a name="l00287"></a>00287 <span class="comment"> *</span>
<a name="l00288"></a>00288 <span class="comment"> * Allocates a new cache, initializes it properly and updates it to</span>
<a name="l00289"></a>00289 <span class="comment"> * include all classes attached to the specified interface.</span>
<a name="l00290"></a>00290 <span class="comment"> *</span>
<a name="l00291"></a>00291 <span class="comment"> * @note The caller is responsible for destroying and freeing the</span>
<a name="l00292"></a>00292 <span class="comment"> * cache after using it.</span>
<a name="l00293"></a>00293 <span class="comment"> * @return The cache or NULL if an error has occured.</span>
<a name="l00294"></a>00294 <span class="comment"> */</span>
<a name="l00295"></a><a class="code" href="group__cls.html#ga626b768f7f4d6052c45d9603f86f16cf">00295</a> <span class="keyword">struct </span>nl_cache *<a class="code" href="group__cls.html#ga626b768f7f4d6052c45d9603f86f16cf" title="Build a classifier cache including all classifiers attached to the specified class/qdisc on eht speci...">rtnl_cls_alloc_cache</a>(<span class="keyword">struct</span> nl_handle *handle,
<a name="l00296"></a>00296 <span class="keywordtype">int</span> ifindex, uint32_t parent)
<a name="l00297"></a>00297 {
<a name="l00298"></a>00298 <span class="keyword">struct </span>nl_cache * cache;
<a name="l00299"></a>00299
<a name="l00300"></a>00300 cache = <a class="code" href="group__cache.html#ga9520ae0f2158db3c081f34c851d92252" title="Allocate an empty cache.">nl_cache_alloc</a>(&<a class="code" href="structrtnl__cls__ops.html" title="Classifier operations.">rtnl_cls_ops</a>);
<a name="l00301"></a>00301 <span class="keywordflow">if</span> (cache == NULL)
<a name="l00302"></a>00302 <span class="keywordflow">return</span> NULL;
<a name="l00303"></a>00303
<a name="l00304"></a>00304 cache->c_iarg1 = ifindex;
<a name="l00305"></a>00305 cache->c_iarg2 = parent;
<a name="l00306"></a>00306
<a name="l00307"></a>00307 <span class="keywordflow">if</span> (handle && <a class="code" href="group__cache.html#gaf5bd584017847e6ef69ec36739a6aaf0" title="(Re)fill a cache with the contents in the kernel.">nl_cache_refill</a>(handle, cache) < 0) {
<a name="l00308"></a>00308 <a class="code" href="group__cache.html#ga530c896db26d72001d011114b1e6cfaa" title="Free a cache.">nl_cache_free</a>(cache);
<a name="l00309"></a>00309 <span class="keywordflow">return</span> NULL;
<a name="l00310"></a>00310 }
<a name="l00311"></a>00311
<a name="l00312"></a>00312 <span class="keywordflow">return</span> cache;
<a name="l00313"></a>00313 }
<a name="l00314"></a>00314 <span class="comment"></span>
<a name="l00315"></a>00315 <span class="comment">/** @} */</span>
<a name="l00316"></a>00316
<a name="l00317"></a>00317 <span class="keyword">static</span> <span class="keyword">struct </span><a class="code" href="structnl__cache__ops.html" title="Cache Operations.">nl_cache_ops</a> <a class="code" href="structrtnl__cls__ops.html" title="Classifier operations.">rtnl_cls_ops</a> = {
<a name="l00318"></a>00318 .co_name = <span class="stringliteral">"route/cls"</span>,
<a name="l00319"></a>00319 .co_hdrsize = <span class="keyword">sizeof</span>(<span class="keyword">struct </span>tcmsg),
<a name="l00320"></a>00320 .co_msgtypes = {
<a name="l00321"></a>00321 { RTM_NEWTFILTER, NL_ACT_NEW, <span class="stringliteral">"new"</span> },
<a name="l00322"></a>00322 { RTM_DELTFILTER, NL_ACT_DEL, <span class="stringliteral">"del"</span> },
<a name="l00323"></a>00323 { RTM_GETTFILTER, NL_ACT_GET, <span class="stringliteral">"get"</span> },
<a name="l00324"></a>00324 END_OF_MSGTYPES_LIST,
<a name="l00325"></a>00325 },
<a name="l00326"></a>00326 .co_protocol = NETLINK_ROUTE,
<a name="l00327"></a>00327 .co_request_update = cls_request_update,
<a name="l00328"></a>00328 .co_msg_parser = cls_msg_parser,
<a name="l00329"></a>00329 .co_obj_ops = &cls_obj_ops,
<a name="l00330"></a>00330 };
<a name="l00331"></a>00331
<a name="l00332"></a>00332 <span class="keyword">static</span> <span class="keywordtype">void</span> __init cls_init(<span class="keywordtype">void</span>)
<a name="l00333"></a>00333 {
<a name="l00334"></a>00334 <a class="code" href="group__cache__mngt.html#ga390eeb1fa61634cf1c216792c6df63c3" title="Register a set of cache operations.">nl_cache_mngt_register</a>(&rtnl_cls_ops);
<a name="l00335"></a>00335 }
<a name="l00336"></a>00336
<a name="l00337"></a>00337 <span class="keyword">static</span> <span class="keywordtype">void</span> __exit cls_exit(<span class="keywordtype">void</span>)
<a name="l00338"></a>00338 {
<a name="l00339"></a>00339 <a class="code" href="group__cache__mngt.html#ga09f56b767b3868b7e0cf8559863dde77" title="Unregister a set of cache operations.">nl_cache_mngt_unregister</a>(&rtnl_cls_ops);
<a name="l00340"></a>00340 }
<a name="l00341"></a>00341 <span class="comment"></span>
<a name="l00342"></a>00342 <span class="comment">/** @} */</span>
</pre></div></div>
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