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

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<h1>lib/route/route_utils.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/route_utils.c      Routing Utilities</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"> */</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 route</span>
<a name="l00014"></a>00014 <span class="comment"> * @defgroup route_utils Utilities</span>
<a name="l00015"></a>00015 <span class="comment"> * @brief Routing Utility Functions</span>
<a name="l00016"></a>00016 <span class="comment"> *</span>
<a name="l00017"></a>00017 <span class="comment"> *</span>
<a name="l00018"></a>00018 <span class="comment"> * @par 1) Translating Routing Table Names</span>
<a name="l00019"></a>00019 <span class="comment"> * @code</span>
<a name="l00020"></a>00020 <span class="comment"> * // libnl is only aware of the de facto standard routing table names.</span>
<a name="l00021"></a>00021 <span class="comment"> * // Additional name &lt;-&gt; identifier associations have to be read in via</span>
<a name="l00022"></a>00022 <span class="comment"> * // a configuration file, f.e. /etc/iproute2/rt_tables</span>
<a name="l00023"></a>00023 <span class="comment"> * err = rtnl_route_read_table_names(&quot;/etc/iproute2/rt_tables&quot;);</span>
<a name="l00024"></a>00024 <span class="comment"> *</span>
<a name="l00025"></a>00025 <span class="comment"> * // Translating a table name to its idenfier</span>
<a name="l00026"></a>00026 <span class="comment"> * int table = rtnl_route_str2table(&quot;main&quot;);</span>
<a name="l00027"></a>00027 <span class="comment"> *</span>
<a name="l00028"></a>00028 <span class="comment"> * // ... and the other way around.</span>
<a name="l00029"></a>00029 <span class="comment"> * char buf[32];</span>
<a name="l00030"></a>00030 <span class="comment"> * printf(&quot;Name: %s\n&quot;,</span>
<a name="l00031"></a>00031 <span class="comment"> *        rtnl_route_table2str(table, buf, sizeof(buf)));</span>
<a name="l00032"></a>00032 <span class="comment"> * @endcode</span>
<a name="l00033"></a>00033 <span class="comment"> *</span>
<a name="l00034"></a>00034 <span class="comment"> *</span>
<a name="l00035"></a>00035 <span class="comment"> *</span>
<a name="l00036"></a>00036 <span class="comment"> *</span>
<a name="l00037"></a>00037 <span class="comment"> * @{</span>
<a name="l00038"></a>00038 <span class="comment"> */</span>
<a name="l00039"></a>00039 
<a name="l00040"></a>00040 <span class="preprocessor">#include &lt;netlink-local.h&gt;</span>
<a name="l00041"></a>00041 <span class="preprocessor">#include &lt;netlink/netlink.h&gt;</span>
<a name="l00042"></a>00042 <span class="preprocessor">#include &lt;netlink/utils.h&gt;</span>
<a name="l00043"></a>00043 <span class="preprocessor">#include &lt;netlink/route/rtnl.h&gt;</span>
<a name="l00044"></a>00044 <span class="preprocessor">#include &lt;netlink/route/route.h&gt;</span>
<a name="l00045"></a>00045         <span class="comment"></span>
<a name="l00046"></a>00046 <span class="comment">/**</span>
<a name="l00047"></a>00047 <span class="comment"> * @name Routing Table Identifier Translations</span>
<a name="l00048"></a>00048 <span class="comment"> * @{</span>
<a name="l00049"></a>00049 <span class="comment"> */</span>
<a name="l00050"></a>00050 
<a name="l00051"></a>00051 <span class="keyword">static</span> NL_LIST_HEAD(table_names);
<a name="l00052"></a>00052 
<a name="l00053"></a>00053 <span class="keyword">static</span> <span class="keywordtype">int</span> add_routing_table_name(<span class="keywordtype">long</span> <span class="keywordtype">id</span>, <span class="keyword">const</span> <span class="keywordtype">char</span> *name)
<a name="l00054"></a>00054 {
<a name="l00055"></a>00055         <span class="keywordflow">return</span> __trans_list_add(<span class="keywordtype">id</span>, name, &amp;table_names);
<a name="l00056"></a>00056 }
<a name="l00057"></a>00057 
<a name="l00058"></a>00058 <span class="keyword">static</span> <span class="keywordtype">void</span> __init init_routing_table_names(<span class="keywordtype">void</span>)
<a name="l00059"></a>00059 {
<a name="l00060"></a>00060         add_routing_table_name(RT_TABLE_UNSPEC, <span class="stringliteral">&quot;unspec&quot;</span>);
<a name="l00061"></a>00061         add_routing_table_name(RT_TABLE_DEFAULT, <span class="stringliteral">&quot;default&quot;</span>);
<a name="l00062"></a>00062         add_routing_table_name(RT_TABLE_MAIN, <span class="stringliteral">&quot;main&quot;</span>);
<a name="l00063"></a>00063         add_routing_table_name(RT_TABLE_LOCAL, <span class="stringliteral">&quot;local&quot;</span>);
<a name="l00064"></a>00064 };
<a name="l00065"></a>00065 
<a name="l00066"></a>00066 <span class="keywordtype">int</span> rtnl_route_read_table_names(<span class="keyword">const</span> <span class="keywordtype">char</span> *path)
<a name="l00067"></a>00067 {
<a name="l00068"></a>00068         __trans_list_clear(&amp;table_names);
<a name="l00069"></a>00069 
<a name="l00070"></a>00070         <span class="keywordflow">return</span> __nl_read_num_str_file(path, &amp;add_routing_table_name);
<a name="l00071"></a>00071 }
<a name="l00072"></a>00072 
<a name="l00073"></a>00073 <span class="keywordtype">char</span> *rtnl_route_table2str(<span class="keywordtype">int</span> table, <span class="keywordtype">char</span> *buf, <span class="keywordtype">size_t</span> size)
<a name="l00074"></a>00074 {
<a name="l00075"></a>00075         <span class="keywordflow">return</span> __list_type2str(table, buf, size, &amp;table_names);
<a name="l00076"></a>00076 }
<a name="l00077"></a>00077 
<a name="l00078"></a>00078 <span class="keywordtype">int</span> rtnl_route_str2table(<span class="keyword">const</span> <span class="keywordtype">char</span> *name)
<a name="l00079"></a>00079 {
<a name="l00080"></a>00080         <span class="keywordflow">return</span> __list_str2type(name, &amp;table_names);
<a name="l00081"></a>00081 }
<a name="l00082"></a>00082 
<a name="l00083"></a>00083 <span class="comment"></span>
<a name="l00084"></a>00084 <span class="comment">/** @} */</span>
<a name="l00085"></a>00085 <span class="comment"></span>
<a name="l00086"></a>00086 <span class="comment">/**</span>
<a name="l00087"></a>00087 <span class="comment"> * @name Routing Protocol Translations</span>
<a name="l00088"></a>00088 <span class="comment"> * @{</span>
<a name="l00089"></a>00089 <span class="comment"> */</span>
<a name="l00090"></a>00090 
<a name="l00091"></a>00091 <span class="keyword">static</span> NL_LIST_HEAD(proto_names);
<a name="l00092"></a>00092 
<a name="l00093"></a>00093 <span class="keyword">static</span> <span class="keywordtype">int</span> add_proto_name(<span class="keywordtype">long</span> <span class="keywordtype">id</span>, <span class="keyword">const</span> <span class="keywordtype">char</span> *name)
<a name="l00094"></a>00094 {
<a name="l00095"></a>00095         <span class="keywordflow">return</span> __trans_list_add(<span class="keywordtype">id</span>, name, &amp;proto_names);
<a name="l00096"></a>00096 }
<a name="l00097"></a>00097 
<a name="l00098"></a>00098 <span class="keyword">static</span> <span class="keywordtype">void</span> __init init_proto_names(<span class="keywordtype">void</span>)
<a name="l00099"></a>00099 {
<a name="l00100"></a>00100         add_proto_name(RTPROT_UNSPEC, <span class="stringliteral">&quot;unspec&quot;</span>);
<a name="l00101"></a>00101         add_proto_name(RTPROT_REDIRECT, <span class="stringliteral">&quot;redirect&quot;</span>);
<a name="l00102"></a>00102         add_proto_name(RTPROT_KERNEL, <span class="stringliteral">&quot;kernel&quot;</span>);
<a name="l00103"></a>00103         add_proto_name(RTPROT_BOOT, <span class="stringliteral">&quot;boot&quot;</span>);
<a name="l00104"></a>00104         add_proto_name(RTPROT_STATIC, <span class="stringliteral">&quot;static&quot;</span>);
<a name="l00105"></a>00105 };
<a name="l00106"></a>00106 
<a name="l00107"></a>00107 <span class="keywordtype">int</span> rtnl_route_read_protocol_names(<span class="keyword">const</span> <span class="keywordtype">char</span> *path)
<a name="l00108"></a>00108 {
<a name="l00109"></a>00109         __trans_list_clear(&amp;proto_names);
<a name="l00110"></a>00110 
<a name="l00111"></a>00111         <span class="keywordflow">return</span> __nl_read_num_str_file(path, &amp;add_proto_name);
<a name="l00112"></a>00112 }
<a name="l00113"></a>00113 
<a name="l00114"></a>00114 <span class="keywordtype">char</span> *rtnl_route_proto2str(<span class="keywordtype">int</span> proto, <span class="keywordtype">char</span> *buf, <span class="keywordtype">size_t</span> size)
<a name="l00115"></a>00115 {
<a name="l00116"></a>00116         <span class="keywordflow">return</span> __list_type2str(proto, buf, size, &amp;proto_names);
<a name="l00117"></a>00117 }
<a name="l00118"></a>00118 
<a name="l00119"></a>00119 <span class="keywordtype">int</span> rtnl_route_str2proto(<span class="keyword">const</span> <span class="keywordtype">char</span> *name)
<a name="l00120"></a>00120 {
<a name="l00121"></a>00121         <span class="keywordflow">return</span> __list_str2type(name, &amp;proto_names);
<a name="l00122"></a>00122 }
<a name="l00123"></a>00123 <span class="comment"></span>
<a name="l00124"></a>00124 <span class="comment">/** @} */</span>
<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 Routing Metrices Translations</span>
<a name="l00128"></a>00128 <span class="comment"> * @{</span>
<a name="l00129"></a>00129 <span class="comment"> */</span>
<a name="l00130"></a>00130 
<a name="l00131"></a>00131 <span class="keyword">static</span> <span class="keyword">struct </span>trans_tbl route_metrices[] = {
<a name="l00132"></a>00132         __ADD(RTAX_UNSPEC, unspec)
<a name="l00133"></a>00133         __ADD(RTAX_LOCK, lock)
<a name="l00134"></a>00134         __ADD(RTAX_MTU, mtu)
<a name="l00135"></a>00135         __ADD(RTAX_WINDOW, window)
<a name="l00136"></a>00136         __ADD(RTAX_RTT, rtt)
<a name="l00137"></a>00137         __ADD(RTAX_RTTVAR, rttvar)
<a name="l00138"></a>00138         __ADD(RTAX_SSTHRESH, ssthresh)
<a name="l00139"></a>00139         __ADD(RTAX_CWND, cwnd)
<a name="l00140"></a>00140         __ADD(RTAX_ADVMSS, advmss)
<a name="l00141"></a>00141         __ADD(RTAX_REORDERING, reordering)
<a name="l00142"></a>00142         __ADD(RTAX_HOPLIMIT, hoplimit)
<a name="l00143"></a>00143         __ADD(RTAX_INITCWND, initcwnd)
<a name="l00144"></a>00144         __ADD(RTAX_FEATURES, features)
<a name="l00145"></a>00145 };
<a name="l00146"></a>00146 
<a name="l00147"></a>00147 <span class="keywordtype">char</span> *rtnl_route_metric2str(<span class="keywordtype">int</span> metric, <span class="keywordtype">char</span> *buf, <span class="keywordtype">size_t</span> size)
<a name="l00148"></a>00148 {
<a name="l00149"></a>00149         <span class="keywordflow">return</span> __type2str(metric, buf, size, route_metrices,
<a name="l00150"></a>00150                           ARRAY_SIZE(route_metrices));
<a name="l00151"></a>00151 }
<a name="l00152"></a>00152 
<a name="l00153"></a>00153 <span class="keywordtype">int</span> rtnl_route_str2metric(<span class="keyword">const</span> <span class="keywordtype">char</span> *name)
<a name="l00154"></a>00154 {
<a name="l00155"></a>00155         <span class="keywordflow">return</span> __str2type(name, route_metrices, ARRAY_SIZE(route_metrices));
<a name="l00156"></a>00156 }
<a name="l00157"></a>00157 <span class="comment"></span>
<a name="l00158"></a>00158 <span class="comment">/** @} */</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"> * @name Nexthop Flags Translations</span>
<a name="l00162"></a>00162 <span class="comment"> * @{</span>
<a name="l00163"></a>00163 <span class="comment"> */</span>
<a name="l00164"></a>00164 
<a name="l00165"></a>00165 <span class="keyword">static</span> <span class="keyword">struct </span>trans_tbl nh_flags[] = {
<a name="l00166"></a>00166         __ADD(RTNH_F_DEAD, dead)
<a name="l00167"></a>00167         __ADD(RTNH_F_PERVASIVE, pervasive)
<a name="l00168"></a>00168         __ADD(RTNH_F_ONLINK, onlink)
<a name="l00169"></a>00169 };
<a name="l00170"></a>00170 
<a name="l00171"></a>00171 <span class="keywordtype">char</span> * rtnl_route_nh_flags2str(<span class="keywordtype">int</span> flags, <span class="keywordtype">char</span> *buf, <span class="keywordtype">size_t</span> len)
<a name="l00172"></a>00172 {
<a name="l00173"></a>00173         <span class="keywordflow">return</span> __flags2str(flags, buf, len, nh_flags, ARRAY_SIZE(nh_flags));
<a name="l00174"></a>00174 }
<a name="l00175"></a>00175 
<a name="l00176"></a>00176 <span class="keywordtype">int</span> rtnl_route_nh_str2flags(<span class="keyword">const</span> <span class="keywordtype">char</span> *name)
<a name="l00177"></a>00177 {
<a name="l00178"></a>00178         <span class="keywordflow">return</span> __str2flags(name, nh_flags, ARRAY_SIZE(nh_flags));
<a name="l00179"></a>00179 }
<a name="l00180"></a>00180 <span class="comment"></span>
<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">/** @} */</span>
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