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<h1>lib/route/sch/red.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/sch/red.c RED Qdisc</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 qdisc_api</span>
<a name="l00014"></a>00014 <span class="comment"> * @defgroup red Random Early Detection (RED)</span>
<a name="l00015"></a>00015 <span class="comment"> * @brief</span>
<a name="l00016"></a>00016 <span class="comment"> * @{</span>
<a name="l00017"></a>00017 <span class="comment"> */</span>
<a name="l00018"></a>00018
<a name="l00019"></a>00019 <span class="preprocessor">#include <netlink-local.h></span>
<a name="l00020"></a>00020 <span class="preprocessor">#include <netlink-tc.h></span>
<a name="l00021"></a>00021 <span class="preprocessor">#include <netlink/netlink.h></span>
<a name="l00022"></a>00022 <span class="preprocessor">#include <netlink/utils.h></span>
<a name="l00023"></a>00023 <span class="preprocessor">#include <netlink/route/qdisc.h></span>
<a name="l00024"></a>00024 <span class="preprocessor">#include <netlink/route/qdisc-modules.h></span>
<a name="l00025"></a>00025 <span class="preprocessor">#include <netlink/route/sch/red.h></span>
<a name="l00026"></a>00026 <span class="comment"></span>
<a name="l00027"></a>00027 <span class="comment">/** @cond SKIP */</span>
<a name="l00028"></a>00028 <span class="preprocessor">#define RED_ATTR_LIMIT 0x01</span>
<a name="l00029"></a>00029 <span class="preprocessor"></span><span class="preprocessor">#define RED_ATTR_QTH_MIN 0x02</span>
<a name="l00030"></a>00030 <span class="preprocessor"></span><span class="preprocessor">#define RED_ATTR_QTH_MAX 0x04</span>
<a name="l00031"></a>00031 <span class="preprocessor"></span><span class="preprocessor">#define RED_ATTR_FLAGS 0x08</span>
<a name="l00032"></a>00032 <span class="preprocessor"></span><span class="preprocessor">#define RED_ATTR_WLOG 0x10</span>
<a name="l00033"></a>00033 <span class="preprocessor"></span><span class="preprocessor">#define RED_ATTR_PLOG 0x20</span>
<a name="l00034"></a>00034 <span class="preprocessor"></span><span class="preprocessor">#define RED_ATTR_SCELL_LOG 0x40</span>
<a name="l00035"></a>00035 <span class="preprocessor"></span><span class="comment">/** @endcond */</span>
<a name="l00036"></a>00036
<a name="l00037"></a>00037 <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keyword">struct </span>rtnl_red *red_qdisc(<span class="keyword">struct</span> rtnl_qdisc *qdisc)
<a name="l00038"></a>00038 {
<a name="l00039"></a>00039 <span class="keywordflow">return</span> (<span class="keyword">struct</span> rtnl_red *) qdisc->q_subdata;
<a name="l00040"></a>00040 }
<a name="l00041"></a>00041
<a name="l00042"></a>00042 <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keyword">struct </span>rtnl_red *red_alloc(<span class="keyword">struct</span> rtnl_qdisc *qdisc)
<a name="l00043"></a>00043 {
<a name="l00044"></a>00044 <span class="keywordflow">if</span> (!qdisc->q_subdata)
<a name="l00045"></a>00045 qdisc->q_subdata = calloc(1, <span class="keyword">sizeof</span>(<span class="keyword">struct</span> rtnl_red));
<a name="l00046"></a>00046
<a name="l00047"></a>00047 <span class="keywordflow">return</span> red_qdisc(qdisc);
<a name="l00048"></a>00048 }
<a name="l00049"></a>00049
<a name="l00050"></a>00050 <span class="keyword">static</span> <span class="keyword">struct </span><a class="code" href="structnla__policy.html" title="attribute validation policy">nla_policy</a> red_policy[TCA_RED_MAX+1] = {
<a name="l00051"></a>00051 [TCA_RED_PARMS] = { .<a class="code" href="structnla__policy.html#a70310d3332cb82c390754bd70b1cb7dd" title="Minimal length of payload required to be available.">minlen</a> = <span class="keyword">sizeof</span>(<span class="keyword">struct </span>tc_red_qopt) },
<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> red_msg_parser(<span class="keyword">struct</span> rtnl_qdisc *qdisc)
<a name="l00055"></a>00055 {
<a name="l00056"></a>00056 <span class="keyword">struct </span>nlattr *tb[TCA_RED_MAX+1];
<a name="l00057"></a>00057 <span class="keyword">struct </span>rtnl_red *red;
<a name="l00058"></a>00058 <span class="keyword">struct </span>tc_red_qopt *opts;
<a name="l00059"></a>00059 <span class="keywordtype">int</span> err;
<a name="l00060"></a>00060
<a name="l00061"></a>00061 <span class="keywordflow">if</span> (!(qdisc->ce_mask & TCA_ATTR_OPTS))
<a name="l00062"></a>00062 <span class="keywordflow">return</span> 0;
<a name="l00063"></a>00063
<a name="l00064"></a>00064 err = tca_parse(tb, TCA_RED_MAX, (<span class="keyword">struct</span> rtnl_tca *) qdisc, red_policy);
<a name="l00065"></a>00065 <span class="keywordflow">if</span> (err < 0)
<a name="l00066"></a>00066 <span class="keywordflow">return</span> err;
<a name="l00067"></a>00067
<a name="l00068"></a>00068 <span class="keywordflow">if</span> (!tb[TCA_RED_PARMS])
<a name="l00069"></a>00069 <span class="keywordflow">return</span> nl_error(EINVAL, <span class="stringliteral">"Missing TCA_RED_PARMS"</span>);
<a name="l00070"></a>00070
<a name="l00071"></a>00071 red = red_alloc(qdisc);
<a name="l00072"></a>00072 <span class="keywordflow">if</span> (!red)
<a name="l00073"></a>00073 <span class="keywordflow">return</span> nl_errno(ENOMEM);
<a name="l00074"></a>00074
<a name="l00075"></a>00075 opts = <a class="code" href="group__attr.html#gaf39d6bbd2be1fc2de30b6b7d079a5fce" title="head of payload">nla_data</a>(tb[TCA_RED_PARMS]);
<a name="l00076"></a>00076
<a name="l00077"></a>00077 red->qr_limit = opts->limit;
<a name="l00078"></a>00078 red->qr_qth_min = opts->qth_min;
<a name="l00079"></a>00079 red->qr_qth_max = opts->qth_max;
<a name="l00080"></a>00080 red->qr_flags = opts->flags;
<a name="l00081"></a>00081 red->qr_wlog = opts->Wlog;
<a name="l00082"></a>00082 red->qr_plog = opts->Plog;
<a name="l00083"></a>00083 red->qr_scell_log = opts->Scell_log;
<a name="l00084"></a>00084
<a name="l00085"></a>00085 red->qr_mask = (RED_ATTR_LIMIT | RED_ATTR_QTH_MIN | RED_ATTR_QTH_MAX |
<a name="l00086"></a>00086 RED_ATTR_FLAGS | RED_ATTR_WLOG | RED_ATTR_PLOG |
<a name="l00087"></a>00087 RED_ATTR_SCELL_LOG);
<a name="l00088"></a>00088
<a name="l00089"></a>00089 <span class="keywordflow">return</span> 0;
<a name="l00090"></a>00090 }
<a name="l00091"></a>00091
<a name="l00092"></a>00092 <span class="keyword">static</span> <span class="keywordtype">int</span> red_dump_brief(<span class="keyword">struct</span> rtnl_qdisc *qdisc, <span class="keyword">struct</span> <a class="code" href="structnl__dump__params.html" title="Dumping parameters.">nl_dump_params</a> *p,
<a name="l00093"></a>00093 <span class="keywordtype">int</span> line)
<a name="l00094"></a>00094 {
<a name="l00095"></a>00095 <span class="keyword">struct </span>rtnl_red *red = red_qdisc(qdisc);
<a name="l00096"></a>00096
<a name="l00097"></a>00097 <span class="keywordflow">if</span> (red) {
<a name="l00098"></a>00098 <span class="comment">/* XXX: limit, min, max, flags */</span>
<a name="l00099"></a>00099 }
<a name="l00100"></a>00100
<a name="l00101"></a>00101 <span class="keywordflow">return</span> line;
<a name="l00102"></a>00102 }
<a name="l00103"></a>00103
<a name="l00104"></a>00104 <span class="keyword">static</span> <span class="keywordtype">int</span> red_dump_full(<span class="keyword">struct</span> rtnl_qdisc *qdisc, <span class="keyword">struct</span> <a class="code" href="structnl__dump__params.html" title="Dumping parameters.">nl_dump_params</a> *p,
<a name="l00105"></a>00105 <span class="keywordtype">int</span> line)
<a name="l00106"></a>00106 {
<a name="l00107"></a>00107 <span class="keyword">struct </span>rtnl_red *red = red_qdisc(qdisc);
<a name="l00108"></a>00108
<a name="l00109"></a>00109 <span class="keywordflow">if</span> (red) {
<a name="l00110"></a>00110 <span class="comment">/* XXX: wlog, plog, scell_log */</span>
<a name="l00111"></a>00111 }
<a name="l00112"></a>00112
<a name="l00113"></a>00113 <span class="keywordflow">return</span> line;
<a name="l00114"></a>00114 }
<a name="l00115"></a>00115
<a name="l00116"></a>00116 <span class="keyword">static</span> <span class="keywordtype">int</span> red_dump_stats(<span class="keyword">struct</span> rtnl_qdisc *qdisc, <span class="keyword">struct</span> <a class="code" href="structnl__dump__params.html" title="Dumping parameters.">nl_dump_params</a> *p,
<a name="l00117"></a>00117 <span class="keywordtype">int</span> line)
<a name="l00118"></a>00118 {
<a name="l00119"></a>00119 <span class="keyword">struct </span>rtnl_red *red = red_qdisc(qdisc);
<a name="l00120"></a>00120
<a name="l00121"></a>00121 <span class="keywordflow">if</span> (red) {
<a name="l00122"></a>00122 <span class="comment">/* XXX: xstats */</span>
<a name="l00123"></a>00123 }
<a name="l00124"></a>00124
<a name="l00125"></a>00125 <span class="keywordflow">return</span> line;
<a name="l00126"></a>00126 }
<a name="l00127"></a>00127
<a name="l00128"></a>00128 <span class="keyword">static</span> <span class="keyword">struct </span>nl_msg *red_get_opts(<span class="keyword">struct</span> rtnl_qdisc *qdisc)
<a name="l00129"></a>00129 {
<a name="l00130"></a>00130 <span class="keyword">struct </span>rtnl_red *red;
<a name="l00131"></a>00131 <span class="keyword">struct </span>nl_msg *msg;
<a name="l00132"></a>00132
<a name="l00133"></a>00133 red = red_qdisc(qdisc);
<a name="l00134"></a>00134 <span class="keywordflow">if</span> (!red)
<a name="l00135"></a>00135 <span class="keywordflow">return</span> NULL;
<a name="l00136"></a>00136
<a name="l00137"></a>00137 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="l00138"></a>00138 <span class="keywordflow">if</span> (!msg)
<a name="l00139"></a>00139 <span class="keywordflow">goto</span> errout;
<a name="l00140"></a>00140
<a name="l00141"></a>00141 <span class="preprocessor">#if 0</span>
<a name="l00142"></a>00142 <span class="preprocessor"></span> memset(&opts, 0, <span class="keyword">sizeof</span>(opts));
<a name="l00143"></a>00143 opts.quantum = sfq->qs_quantum;
<a name="l00144"></a>00144 opts.perturb_period = sfq->qs_perturb;
<a name="l00145"></a>00145 opts.limit = sfq->qs_limit;
<a name="l00146"></a>00146
<a name="l00147"></a>00147 <span class="keywordflow">if</span> (<a class="code" href="group__msg.html#gacc5e5ade5675d041f86c7c8693f7088d" title="Append data to tail of a netlink message.">nlmsg_append</a>(msg, &opts, <span class="keyword">sizeof</span>(opts), NL_DONTPAD) < 0)
<a name="l00148"></a>00148 <span class="keywordflow">goto</span> errout;
<a name="l00149"></a>00149 <span class="preprocessor">#endif</span>
<a name="l00150"></a>00150 <span class="preprocessor"></span>
<a name="l00151"></a>00151 <span class="keywordflow">return</span> msg;
<a name="l00152"></a>00152 errout:
<a name="l00153"></a>00153 <a class="code" href="group__msg.html#ga138ba9bee70553f9fbe7143deacad48c" title="Free a netlink message.">nlmsg_free</a>(msg);
<a name="l00154"></a>00154 <span class="keywordflow">return</span> NULL;
<a name="l00155"></a>00155 }
<a name="l00156"></a>00156 <span class="comment"></span>
<a name="l00157"></a>00157 <span class="comment">/**</span>
<a name="l00158"></a>00158 <span class="comment"> * @name Attribute Access</span>
<a name="l00159"></a>00159 <span class="comment"> * @{</span>
<a name="l00160"></a>00160 <span class="comment"> */</span>
<a name="l00161"></a>00161 <span class="comment"></span>
<a name="l00162"></a>00162 <span class="comment">/**</span>
<a name="l00163"></a>00163 <span class="comment"> * Set limit of RED qdisc.</span>
<a name="l00164"></a>00164 <span class="comment"> * @arg qdisc RED qdisc to be modified.</span>
<a name="l00165"></a>00165 <span class="comment"> * @arg limit New limit in number of packets.</span>
<a name="l00166"></a>00166 <span class="comment"> * @return 0 on success or a negative error code.</span>
<a name="l00167"></a>00167 <span class="comment"> */</span>
<a name="l00168"></a><a class="code" href="group__red.html#ga063292849f5d8c9a6017cac33968df68">00168</a> <span class="keywordtype">int</span> <a class="code" href="group__red.html#ga063292849f5d8c9a6017cac33968df68" title="Set limit of RED qdisc.">rtnl_red_set_limit</a>(<span class="keyword">struct</span> rtnl_qdisc *qdisc, <span class="keywordtype">int</span> limit)
<a name="l00169"></a>00169 {
<a name="l00170"></a>00170 <span class="keyword">struct </span>rtnl_red *red;
<a name="l00171"></a>00171
<a name="l00172"></a>00172 red = red_alloc(qdisc);
<a name="l00173"></a>00173 <span class="keywordflow">if</span> (!red)
<a name="l00174"></a>00174 <span class="keywordflow">return</span> nl_errno(ENOMEM);
<a name="l00175"></a>00175
<a name="l00176"></a>00176 red->qr_limit = limit;
<a name="l00177"></a>00177 red->qr_mask |= RED_ATTR_LIMIT;
<a name="l00178"></a>00178
<a name="l00179"></a>00179 <span class="keywordflow">return</span> 0;
<a name="l00180"></a>00180 }
<a name="l00181"></a>00181 <span class="comment"></span>
<a name="l00182"></a>00182 <span class="comment">/**</span>
<a name="l00183"></a>00183 <span class="comment"> * Get limit of RED qdisc.</span>
<a name="l00184"></a>00184 <span class="comment"> * @arg qdisc RED qdisc.</span>
<a name="l00185"></a>00185 <span class="comment"> * @return Limit or a negative error code.</span>
<a name="l00186"></a>00186 <span class="comment"> */</span>
<a name="l00187"></a><a class="code" href="group__red.html#gaf9eff05203e6049ca70af778d1076b84">00187</a> <span class="keywordtype">int</span> <a class="code" href="group__red.html#gaf9eff05203e6049ca70af778d1076b84" title="Get limit of RED qdisc.">rtnl_red_get_limit</a>(<span class="keyword">struct</span> rtnl_qdisc *qdisc)
<a name="l00188"></a>00188 {
<a name="l00189"></a>00189 <span class="keyword">struct </span>rtnl_red *red;
<a name="l00190"></a>00190
<a name="l00191"></a>00191 red = red_qdisc(qdisc);
<a name="l00192"></a>00192 <span class="keywordflow">if</span> (red && (red->qr_mask & RED_ATTR_LIMIT))
<a name="l00193"></a>00193 <span class="keywordflow">return</span> red->qr_limit;
<a name="l00194"></a>00194 <span class="keywordflow">else</span>
<a name="l00195"></a>00195 <span class="keywordflow">return</span> nl_errno(ENOENT);
<a name="l00196"></a>00196 }
<a name="l00197"></a>00197 <span class="comment"></span>
<a name="l00198"></a>00198 <span class="comment">/** @} */</span>
<a name="l00199"></a>00199
<a name="l00200"></a>00200 <span class="keyword">static</span> <span class="keyword">struct </span><a class="code" href="structrtnl__qdisc__ops.html" title="Qdisc Operations.">rtnl_qdisc_ops</a> red_ops = {
<a name="l00201"></a>00201 .<a class="code" href="structrtnl__qdisc__ops.html#a5df5424d29acfa9ae66e7f35a9ca2081" title="Kind/Name of Qdisc.">qo_kind</a> = <span class="stringliteral">"red"</span>,
<a name="l00202"></a>00202 .qo_msg_parser = red_msg_parser,
<a name="l00203"></a>00203 .qo_dump[<a class="code" href="group__utils.html#ggacfb5566c73f0965c5241d7d49bc717e9a5597887c080d5ecae358b6065a4048fd" title="Dump object in a brief one-liner.">NL_DUMP_BRIEF</a>] = red_dump_brief,
<a name="l00204"></a>00204 .qo_dump[<a class="code" href="group__utils.html#ggacfb5566c73f0965c5241d7d49bc717e9a1445106c7af529b2c99ee289fbcd3179" title="Dump all attributes but no statistics.">NL_DUMP_FULL</a>] = red_dump_full,
<a name="l00205"></a>00205 .qo_dump[<a class="code" href="group__utils.html#ggacfb5566c73f0965c5241d7d49bc717e9a8ebedc55094df6175b84fb1230047a65" title="Dump all attributes including statistics.">NL_DUMP_STATS</a>] = red_dump_stats,
<a name="l00206"></a>00206 .qo_get_opts = red_get_opts,
<a name="l00207"></a>00207 };
<a name="l00208"></a>00208
<a name="l00209"></a>00209 <span class="keyword">static</span> <span class="keywordtype">void</span> __init red_init(<span class="keywordtype">void</span>)
<a name="l00210"></a>00210 {
<a name="l00211"></a>00211 <a class="code" href="group__qdisc__api.html#ga52a96211c54bed89f60bc4b106747133" title="Register a qdisc module.">rtnl_qdisc_register</a>(&red_ops);
<a name="l00212"></a>00212 }
<a name="l00213"></a>00213
<a name="l00214"></a>00214 <span class="keyword">static</span> <span class="keywordtype">void</span> __exit red_exit(<span class="keywordtype">void</span>)
<a name="l00215"></a>00215 {
<a name="l00216"></a>00216 <a class="code" href="group__qdisc__api.html#ga0e1c8c70c536964578dd544fd23f80ff" title="Unregister a qdisc module.">rtnl_qdisc_unregister</a>(&red_ops);
<a name="l00217"></a>00217 }
<a name="l00218"></a>00218 <span class="comment"></span>
<a name="l00219"></a>00219 <span class="comment">/** @} */</span>
</pre></div></div>
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