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<h1>apps/resolv/resolv.c</h1><a href="a00102.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/**</span>
<a name="l00002"></a>00002 <span class="comment"> * \addtogroup apps</span>
<a name="l00003"></a>00003 <span class="comment"> * @{</span>
<a name="l00004"></a>00004 <span class="comment"> */</span>
<a name="l00005"></a>00005 <span class="comment"></span>
<a name="l00006"></a>00006 <span class="comment">/**</span>
<a name="l00007"></a>00007 <span class="comment"> * \defgroup resolv DNS resolver</span>
<a name="l00008"></a>00008 <span class="comment"> * @{</span>
<a name="l00009"></a>00009 <span class="comment"> *</span>
<a name="l00010"></a>00010 <span class="comment"> * The uIP DNS resolver functions are used to lookup a hostname and</span>
<a name="l00011"></a>00011 <span class="comment"> * map it to a numerical IP address. It maintains a list of resolved</span>
<a name="l00012"></a>00012 <span class="comment"> * hostnames that can be queried with the resolv_lookup()</span>
<a name="l00013"></a>00013 <span class="comment"> * function. New hostnames can be resolved using the resolv_query()</span>
<a name="l00014"></a>00014 <span class="comment"> * function.</span>
<a name="l00015"></a>00015 <span class="comment"> *</span>
<a name="l00016"></a>00016 <span class="comment"> * When a hostname has been resolved (or found to be non-existant),</span>
<a name="l00017"></a>00017 <span class="comment"> * the resolver code calls a callback function called resolv_found()</span>
<a name="l00018"></a>00018 <span class="comment"> * that must be implemented by the module that uses the resolver.</span>
<a name="l00019"></a>00019 <span class="comment"> */</span>
<a name="l00020"></a>00020 <span class="comment"></span>
<a name="l00021"></a>00021 <span class="comment">/**</span>
<a name="l00022"></a>00022 <span class="comment"> * \file</span>
<a name="l00023"></a>00023 <span class="comment"> * DNS host name to IP address resolver.</span>
<a name="l00024"></a>00024 <span class="comment"> * \author Adam Dunkels &lt;adam@dunkels.com&gt;</span>
<a name="l00025"></a>00025 <span class="comment"> *</span>
<a name="l00026"></a>00026 <span class="comment"> * This file implements a DNS host name to IP address resolver.</span>
<a name="l00027"></a>00027 <span class="comment"> */</span>
<a name="l00028"></a>00028 
<a name="l00029"></a>00029 <span class="comment">/*</span>
<a name="l00030"></a>00030 <span class="comment"> * Copyright (c) 2002-2003, Adam Dunkels.</span>
<a name="l00031"></a>00031 <span class="comment"> * All rights reserved.</span>
<a name="l00032"></a>00032 <span class="comment"> *</span>
<a name="l00033"></a>00033 <span class="comment"> * Redistribution and use in source and binary forms, with or without</span>
<a name="l00034"></a>00034 <span class="comment"> * modification, are permitted provided that the following conditions</span>
<a name="l00035"></a>00035 <span class="comment"> * are met:</span>
<a name="l00036"></a>00036 <span class="comment"> * 1. Redistributions of source code must retain the above copyright</span>
<a name="l00037"></a>00037 <span class="comment"> *    notice, this list of conditions and the following disclaimer.</span>
<a name="l00038"></a>00038 <span class="comment"> * 2. Redistributions in binary form must reproduce the above copyright</span>
<a name="l00039"></a>00039 <span class="comment"> *    notice, this list of conditions and the following disclaimer in the</span>
<a name="l00040"></a>00040 <span class="comment"> *    documentation and/or other materials provided with the distribution.</span>
<a name="l00041"></a>00041 <span class="comment"> * 3. The name of the author may not be used to endorse or promote</span>
<a name="l00042"></a>00042 <span class="comment"> *    products derived from this software without specific prior</span>
<a name="l00043"></a>00043 <span class="comment"> *    written permission.</span>
<a name="l00044"></a>00044 <span class="comment"> *</span>
<a name="l00045"></a>00045 <span class="comment"> * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS</span>
<a name="l00046"></a>00046 <span class="comment"> * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED</span>
<a name="l00047"></a>00047 <span class="comment"> * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE</span>
<a name="l00048"></a>00048 <span class="comment"> * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY</span>
<a name="l00049"></a>00049 <span class="comment"> * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL</span>
<a name="l00050"></a>00050 <span class="comment"> * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE</span>
<a name="l00051"></a>00051 <span class="comment"> * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS</span>
<a name="l00052"></a>00052 <span class="comment"> * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,</span>
<a name="l00053"></a>00053 <span class="comment"> * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING</span>
<a name="l00054"></a>00054 <span class="comment"> * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS</span>
<a name="l00055"></a>00055 <span class="comment"> * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span>
<a name="l00056"></a>00056 <span class="comment"> *</span>
<a name="l00057"></a>00057 <span class="comment"> * This file is part of the uIP TCP/IP stack.</span>
<a name="l00058"></a>00058 <span class="comment"> *</span>
<a name="l00059"></a>00059 <span class="comment"> * $Id: resolv.c,v 1.5 2006/06/11 21:46:37 adam Exp $</span>
<a name="l00060"></a>00060 <span class="comment"> *</span>
<a name="l00061"></a>00061 <span class="comment"> */</span>
<a name="l00062"></a>00062 
<a name="l00063"></a>00063 <span class="preprocessor">#include "<a class="code" href="a00103.html">resolv.h</a>"</span>
<a name="l00064"></a>00064 <span class="preprocessor">#include "<a class="code" href="a00136.html">uip.h</a>"</span>
<a name="l00065"></a>00065 
<a name="l00066"></a>00066 <span class="preprocessor">#include &lt;string.h&gt;</span>
<a name="l00067"></a>00067 
<a name="l00068"></a>00068 <span class="preprocessor">#ifndef NULL</span>
<a name="l00069"></a><a class="code" href="a00160.html#g070d2ce7b6bb7e5c05602aa8c308d0c4">00069</a> <span class="preprocessor"></span><span class="preprocessor">#define NULL (void *)0</span>
<a name="l00070"></a>00070 <span class="preprocessor"></span><span class="preprocessor">#endif </span><span class="comment">/* NULL */</span>
<a name="l00071"></a>00071 <span class="comment"></span>
<a name="l00072"></a>00072 <span class="comment">/** \internal The maximum number of retries when asking for a name. */</span>
<a name="l00073"></a><a class="code" href="a00160.html#gecf13b8dc783db2202ca5c34fe117fc3">00073</a> <span class="preprocessor">#define MAX_RETRIES 8</span>
<a name="l00074"></a>00074 <span class="preprocessor"></span><span class="comment"></span>
<a name="l00075"></a>00075 <span class="comment">/** \internal The DNS message header. */</span>
<a name="l00076"></a>00076 <span class="keyword">struct </span>dns_hdr {
<a name="l00077"></a>00077   <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> id;
<a name="l00078"></a>00078   <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> flags1, flags2;
<a name="l00079"></a><a class="code" href="a00102.html#96eb4534b574ece96ed36806039f73d3">00079</a> <span class="preprocessor">#define DNS_FLAG1_RESPONSE        0x80</span>
<a name="l00080"></a><a class="code" href="a00102.html#4350350ce0d4595876743d4c0a720bcc">00080</a> <span class="preprocessor"></span><span class="preprocessor">#define DNS_FLAG1_OPCODE_STATUS   0x10</span>
<a name="l00081"></a><a class="code" href="a00102.html#e7250008b68d1909d54040515eef8ebb">00081</a> <span class="preprocessor"></span><span class="preprocessor">#define DNS_FLAG1_OPCODE_INVERSE  0x08</span>
<a name="l00082"></a><a class="code" href="a00102.html#6a327c0ffd40f69fbcd5f01f12e5745c">00082</a> <span class="preprocessor"></span><span class="preprocessor">#define DNS_FLAG1_OPCODE_STANDARD 0x00</span>
<a name="l00083"></a><a class="code" href="a00102.html#dd685a0f8b5e76a2687cc0f306813bfb">00083</a> <span class="preprocessor"></span><span class="preprocessor">#define DNS_FLAG1_AUTHORATIVE     0x04</span>
<a name="l00084"></a><a class="code" href="a00102.html#2e52037249bb98d7bbecf42e275beb07">00084</a> <span class="preprocessor"></span><span class="preprocessor">#define DNS_FLAG1_TRUNC           0x02</span>
<a name="l00085"></a><a class="code" href="a00102.html#72d99b1623afa14bd58c667b748c2ddc">00085</a> <span class="preprocessor"></span><span class="preprocessor">#define DNS_FLAG1_RD              0x01</span>
<a name="l00086"></a><a class="code" href="a00102.html#c72f8777ccc45ae274449ea7a9f3de04">00086</a> <span class="preprocessor"></span><span class="preprocessor">#define DNS_FLAG2_RA              0x80</span>
<a name="l00087"></a><a class="code" href="a00102.html#9f6c329c04baba17fe0f5b2a6597d713">00087</a> <span class="preprocessor"></span><span class="preprocessor">#define DNS_FLAG2_ERR_MASK        0x0f</span>
<a name="l00088"></a><a class="code" href="a00102.html#6aaa9da3d0f8d4c0799516d46d939942">00088</a> <span class="preprocessor"></span><span class="preprocessor">#define DNS_FLAG2_ERR_NONE        0x00</span>
<a name="l00089"></a><a class="code" href="a00102.html#8ee5e2c8e517d6e4f2198057f81e93c6">00089</a> <span class="preprocessor"></span><span class="preprocessor">#define DNS_FLAG2_ERR_NAME        0x03</span>
<a name="l00090"></a>00090 <span class="preprocessor"></span>  <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> numquestions;
<a name="l00091"></a>00091   <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> numanswers;
<a name="l00092"></a>00092   <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> numauthrr;
<a name="l00093"></a>00093   <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> numextrarr;
<a name="l00094"></a>00094 };
<a name="l00095"></a>00095 <span class="comment"></span>
<a name="l00096"></a>00096 <span class="comment">/** \internal The DNS answer message structure. */</span>
<a name="l00097"></a>00097 <span class="keyword">struct </span>dns_answer {
<a name="l00098"></a>00098   <span class="comment">/* DNS answer record starts with either a domain name or a pointer</span>
<a name="l00099"></a>00099 <span class="comment">     to a name already present somewhere in the packet. */</span>
<a name="l00100"></a>00100   <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> type;
<a name="l00101"></a>00101   <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> <span class="keyword">class</span>;
<a name="l00102"></a>00102   <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> ttl[2];
<a name="l00103"></a>00103   <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> len;
<a name="l00104"></a>00104   <a class="code" href="a00150.html#g1ef35301f43a5bbb9f89f07b5a36b9a0">uip_ipaddr_t</a> ipaddr;
<a name="l00105"></a>00105 };
<a name="l00106"></a>00106 
<a name="l00107"></a>00107 <span class="keyword">struct </span>namemap {
<a name="l00108"></a><a class="code" href="a00102.html#ee60b8757bacab269b0ccd7c240bf01d">00108</a> <span class="preprocessor">#define STATE_UNUSED 0</span>
<a name="l00109"></a><a class="code" href="a00102.html#bf4401501f1389872141a78b63f325a3">00109</a> <span class="preprocessor"></span><span class="preprocessor">#define STATE_NEW    1</span>
<a name="l00110"></a><a class="code" href="a00102.html#55735650f879293d9b7b5fda6753d147">00110</a> <span class="preprocessor"></span><span class="preprocessor">#define STATE_ASKING 2</span>
<a name="l00111"></a><a class="code" href="a00102.html#876c82c946543cd70c141e41417138e0">00111</a> <span class="preprocessor"></span><span class="preprocessor">#define STATE_DONE   3</span>
<a name="l00112"></a><a class="code" href="a00102.html#7bf0c086c7c41c12cc63324327932d91">00112</a> <span class="preprocessor"></span><span class="preprocessor">#define STATE_ERROR  4</span>
<a name="l00113"></a>00113 <span class="preprocessor"></span>  <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> state;
<a name="l00114"></a>00114   <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> tmr;
<a name="l00115"></a>00115   <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> retries;
<a name="l00116"></a>00116   <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> seqno;
<a name="l00117"></a>00117   <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> err;
<a name="l00118"></a>00118   <span class="keywordtype">char</span> name[32];
<a name="l00119"></a>00119   <a class="code" href="a00150.html#g1ef35301f43a5bbb9f89f07b5a36b9a0">uip_ipaddr_t</a> ipaddr;
<a name="l00120"></a>00120 };
<a name="l00121"></a>00121 
<a name="l00122"></a>00122 <span class="preprocessor">#ifndef UIP_CONF_RESOLV_ENTRIES</span>
<a name="l00123"></a><a class="code" href="a00160.html#g221d37ccde7e3fd0dd2c2eb0a6b15493">00123</a> <span class="preprocessor"></span><span class="preprocessor">#define RESOLV_ENTRIES 4</span>
<a name="l00124"></a>00124 <span class="preprocessor"></span><span class="preprocessor">#else </span><span class="comment">/* UIP_CONF_RESOLV_ENTRIES */</span>
<a name="l00125"></a>00125 <span class="preprocessor">#define RESOLV_ENTRIES UIP_CONF_RESOLV_ENTRIES</span>
<a name="l00126"></a>00126 <span class="preprocessor"></span><span class="preprocessor">#endif </span><span class="comment">/* UIP_CONF_RESOLV_ENTRIES */</span>
<a name="l00127"></a>00127 
<a name="l00128"></a>00128 
<a name="l00129"></a>00129 <span class="keyword">static</span> <span class="keyword">struct </span>namemap names[<a class="code" href="a00160.html#g221d37ccde7e3fd0dd2c2eb0a6b15493">RESOLV_ENTRIES</a>];
<a name="l00130"></a>00130 
<a name="l00131"></a>00131 <span class="keyword">static</span> <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> seqno;
<a name="l00132"></a>00132 
<a name="l00133"></a>00133 <span class="keyword">static</span> <span class="keyword">struct </span><a class="code" href="a00095.html">uip_udp_conn</a> *resolv_conn = <a class="code" href="a00160.html#g070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;
<a name="l00134"></a>00134 
<a name="l00135"></a>00135 
<a name="l00136"></a>00136 <span class="comment">/*---------------------------------------------------------------------------*/</span><span class="comment"></span>
<a name="l00137"></a>00137 <span class="comment">/** \internal</span>
<a name="l00138"></a>00138 <span class="comment"> * Walk through a compact encoded DNS name and return the end of it.</span>
<a name="l00139"></a>00139 <span class="comment"> *</span>
<a name="l00140"></a>00140 <span class="comment"> * \return The end of the name.</span>
<a name="l00141"></a>00141 <span class="comment"> */</span>
<a name="l00142"></a>00142 <span class="comment">/*---------------------------------------------------------------------------*/</span>
<a name="l00143"></a>00143 <span class="keyword">static</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *
<a name="l00144"></a>00144 parse_name(<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *query)
<a name="l00145"></a>00145 {
<a name="l00146"></a>00146   <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> n;
<a name="l00147"></a>00147 
<a name="l00148"></a>00148   <span class="keywordflow">do</span> {
<a name="l00149"></a>00149     n = *query++;
<a name="l00150"></a>00150     
<a name="l00151"></a>00151     <span class="keywordflow">while</span>(n &gt; 0) {
<a name="l00152"></a>00152       <span class="comment">/*      printf("%c", *query);*/</span>
<a name="l00153"></a>00153       ++query;
<a name="l00154"></a>00154       --n;
<a name="l00155"></a>00155     };
<a name="l00156"></a>00156     <span class="comment">/*    printf(".");*/</span>
<a name="l00157"></a>00157   } <span class="keywordflow">while</span>(*query != 0);
<a name="l00158"></a>00158   <span class="comment">/*  printf("\n");*/</span>
<a name="l00159"></a>00159   <span class="keywordflow">return</span> query + 1;
<a name="l00160"></a>00160 }
<a name="l00161"></a>00161 <span class="comment">/*---------------------------------------------------------------------------*/</span><span class="comment"></span>
<a name="l00162"></a>00162 <span class="comment">/** \internal</span>
<a name="l00163"></a>00163 <span class="comment"> * Runs through the list of names to see if there are any that have</span>
<a name="l00164"></a>00164 <span class="comment"> * not yet been queried and, if so, sends out a query.</span>
<a name="l00165"></a>00165 <span class="comment"> */</span>
<a name="l00166"></a>00166 <span class="comment">/*---------------------------------------------------------------------------*/</span>
<a name="l00167"></a>00167 <span class="keyword">static</span> <span class="keywordtype">void</span>
<a name="l00168"></a>00168 check_entries(<span class="keywordtype">void</span>)
<a name="l00169"></a>00169 {
<a name="l00170"></a>00170   <span class="keyword">register</span> <span class="keyword">struct </span>dns_hdr *hdr;
<a name="l00171"></a>00171   <span class="keywordtype">char</span> *query, *nptr, *nameptr;
<a name="l00172"></a>00172   <span class="keyword">static</span> <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> i;
<a name="l00173"></a>00173   <span class="keyword">static</span> <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> n;
<a name="l00174"></a>00174   <span class="keyword">register</span> <span class="keyword">struct </span>namemap *namemapptr;
<a name="l00175"></a>00175   
<a name="l00176"></a>00176   <span class="keywordflow">for</span>(i = 0; i &lt; <a class="code" href="a00160.html#g221d37ccde7e3fd0dd2c2eb0a6b15493">RESOLV_ENTRIES</a>; ++i) {
<a name="l00177"></a>00177     namemapptr = &amp;names[i];
<a name="l00178"></a>00178     <span class="keywordflow">if</span>(namemapptr-&gt;state == <a class="code" href="a00102.html#bf4401501f1389872141a78b63f325a3">STATE_NEW</a> ||
<a name="l00179"></a>00179        namemapptr-&gt;state == <a class="code" href="a00102.html#55735650f879293d9b7b5fda6753d147">STATE_ASKING</a>) {
<a name="l00180"></a>00180       <span class="keywordflow">if</span>(namemapptr-&gt;state == <a class="code" href="a00102.html#55735650f879293d9b7b5fda6753d147">STATE_ASKING</a>) {
<a name="l00181"></a>00181         <span class="keywordflow">if</span>(--namemapptr-&gt;tmr == 0) {
<a name="l00182"></a>00182           <span class="keywordflow">if</span>(++namemapptr-&gt;retries == <a class="code" href="a00160.html#gecf13b8dc783db2202ca5c34fe117fc3">MAX_RETRIES</a>) {
<a name="l00183"></a>00183             namemapptr-&gt;state = <a class="code" href="a00102.html#7bf0c086c7c41c12cc63324327932d91">STATE_ERROR</a>;
<a name="l00184"></a>00184             <a class="code" href="a00160.html#g6d9751d534453425c7a5a215d1d4414c">resolv_found</a>(namemapptr-&gt;name, <a class="code" href="a00160.html#g070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>);
<a name="l00185"></a>00185             <span class="keywordflow">continue</span>;
<a name="l00186"></a>00186           }
<a name="l00187"></a>00187           namemapptr-&gt;tmr = namemapptr-&gt;retries;
<a name="l00188"></a>00188         } <span class="keywordflow">else</span> {
<a name="l00189"></a>00189           <span class="comment">/*      printf("Timer %d\n", namemapptr-&gt;tmr);*/</span>
<a name="l00190"></a>00190           <span class="comment">/* Its timer has not run out, so we move on to next</span>
<a name="l00191"></a>00191 <span class="comment">             entry. */</span>
<a name="l00192"></a>00192           <span class="keywordflow">continue</span>;
<a name="l00193"></a>00193         }
<a name="l00194"></a>00194       } <span class="keywordflow">else</span> {
<a name="l00195"></a>00195         namemapptr-&gt;state = <a class="code" href="a00102.html#55735650f879293d9b7b5fda6753d147">STATE_ASKING</a>;
<a name="l00196"></a>00196         namemapptr-&gt;tmr = 1;
<a name="l00197"></a>00197         namemapptr-&gt;retries = 0;
<a name="l00198"></a>00198       }
<a name="l00199"></a>00199       hdr = (<span class="keyword">struct </span>dns_hdr *)<a class="code" href="a00150.html#g561b8eda32e059d4e7397f776268cc63">uip_appdata</a>;
<a name="l00200"></a>00200       memset(hdr, 0, <span class="keyword">sizeof</span>(<span class="keyword">struct</span> dns_hdr));
<a name="l00201"></a>00201       hdr-&gt;id = <a class="code" href="a00148.html#ga22b04cac8cf283ca12f028578bebc06">htons</a>(i);
<a name="l00202"></a>00202       hdr-&gt;flags1 = <a class="code" href="a00102.html#72d99b1623afa14bd58c667b748c2ddc">DNS_FLAG1_RD</a>;
<a name="l00203"></a>00203       hdr-&gt;numquestions = <a class="code" href="a00148.html#g69a7a4951ff21b302267532c21ee78fc">HTONS</a>(1);
<a name="l00204"></a>00204       query = (<span class="keywordtype">char</span> *)<a class="code" href="a00150.html#g561b8eda32e059d4e7397f776268cc63">uip_appdata</a> + 12;
<a name="l00205"></a>00205       nameptr = namemapptr-&gt;name;
<a name="l00206"></a>00206       --nameptr;
<a name="l00207"></a>00207       <span class="comment">/* Convert hostname into suitable query format. */</span>
<a name="l00208"></a>00208       <span class="keywordflow">do</span> {
<a name="l00209"></a>00209         ++nameptr;
<a name="l00210"></a>00210         nptr = query;
<a name="l00211"></a>00211         ++query;
<a name="l00212"></a>00212         <span class="keywordflow">for</span>(n = 0; *nameptr != <span class="charliteral">'.'</span> &amp;&amp; *nameptr != 0; ++nameptr) {
<a name="l00213"></a>00213           *query = *nameptr;
<a name="l00214"></a>00214           ++query;
<a name="l00215"></a>00215           ++n;
<a name="l00216"></a>00216         }
<a name="l00217"></a>00217         *nptr = n;
<a name="l00218"></a>00218       } <span class="keywordflow">while</span>(*nameptr != 0);
<a name="l00219"></a>00219       {
<a name="l00220"></a>00220         <span class="keyword">static</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> endquery[] =
<a name="l00221"></a>00221           {0,0,1,0,1};
<a name="l00222"></a>00222         memcpy(query, endquery, 5);
<a name="l00223"></a>00223       }
<a name="l00224"></a>00224       <a class="code" href="a00147.html#ge5ab69d40013e6cf86ef1763c95d920e">uip_udp_send</a>((<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>)(query + 5 - (<span class="keywordtype">char</span> *)<a class="code" href="a00150.html#g561b8eda32e059d4e7397f776268cc63">uip_appdata</a>));
<a name="l00225"></a>00225       <span class="keywordflow">break</span>;
<a name="l00226"></a>00226     }
<a name="l00227"></a>00227   }
<a name="l00228"></a>00228 }
<a name="l00229"></a>00229 <span class="comment">/*---------------------------------------------------------------------------*/</span><span class="comment"></span>
<a name="l00230"></a>00230 <span class="comment">/** \internal</span>
<a name="l00231"></a>00231 <span class="comment"> * Called when new UDP data arrives.</span>
<a name="l00232"></a>00232 <span class="comment"> */</span>
<a name="l00233"></a>00233 <span class="comment">/*---------------------------------------------------------------------------*/</span>
<a name="l00234"></a>00234 <span class="keyword">static</span> <span class="keywordtype">void</span>
<a name="l00235"></a>00235 newdata(<span class="keywordtype">void</span>)
<a name="l00236"></a>00236 {
<a name="l00237"></a>00237   <span class="keywordtype">char</span> *nameptr;
<a name="l00238"></a>00238   <span class="keyword">struct </span>dns_answer *ans;
<a name="l00239"></a>00239   <span class="keyword">struct </span>dns_hdr *hdr;
<a name="l00240"></a>00240   <span class="keyword">static</span> <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> nquestions, nanswers;
<a name="l00241"></a>00241   <span class="keyword">static</span> <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> i;
<a name="l00242"></a>00242   <span class="keyword">register</span> <span class="keyword">struct </span>namemap *namemapptr;
<a name="l00243"></a>00243   
<a name="l00244"></a>00244   hdr = (<span class="keyword">struct </span>dns_hdr *)<a class="code" href="a00150.html#g561b8eda32e059d4e7397f776268cc63">uip_appdata</a>;
<a name="l00245"></a>00245   <span class="comment">/*  printf("ID %d\n", htons(hdr-&gt;id));</span>
<a name="l00246"></a>00246 <span class="comment">      printf("Query %d\n", hdr-&gt;flags1 &amp; DNS_FLAG1_RESPONSE);</span>
<a name="l00247"></a>00247 <span class="comment">      printf("Error %d\n", hdr-&gt;flags2 &amp; DNS_FLAG2_ERR_MASK);</span>
<a name="l00248"></a>00248 <span class="comment">      printf("Num questions %d, answers %d, authrr %d, extrarr %d\n",</span>
<a name="l00249"></a>00249 <span class="comment">      htons(hdr-&gt;numquestions),</span>
<a name="l00250"></a>00250 <span class="comment">      htons(hdr-&gt;numanswers),</span>
<a name="l00251"></a>00251 <span class="comment">      htons(hdr-&gt;numauthrr),</span>
<a name="l00252"></a>00252 <span class="comment">      htons(hdr-&gt;numextrarr));</span>
<a name="l00253"></a>00253 <span class="comment">  */</span>
<a name="l00254"></a>00254 
<a name="l00255"></a>00255   <span class="comment">/* The ID in the DNS header should be our entry into the name</span>
<a name="l00256"></a>00256 <span class="comment">     table. */</span>
<a name="l00257"></a>00257   i = <a class="code" href="a00148.html#ga22b04cac8cf283ca12f028578bebc06">htons</a>(hdr-&gt;id);
<a name="l00258"></a>00258   namemapptr = &amp;names[i];
<a name="l00259"></a>00259   <span class="keywordflow">if</span>(i &lt; <a class="code" href="a00160.html#g221d37ccde7e3fd0dd2c2eb0a6b15493">RESOLV_ENTRIES</a> &amp;&amp;
<a name="l00260"></a>00260      namemapptr-&gt;state == <a class="code" href="a00102.html#55735650f879293d9b7b5fda6753d147">STATE_ASKING</a>) {
<a name="l00261"></a>00261 
<a name="l00262"></a>00262     <span class="comment">/* This entry is now finished. */</span>
<a name="l00263"></a>00263     namemapptr-&gt;state = <a class="code" href="a00102.html#876c82c946543cd70c141e41417138e0">STATE_DONE</a>;
<a name="l00264"></a>00264     namemapptr-&gt;err = hdr-&gt;flags2 &amp; <a class="code" href="a00102.html#9f6c329c04baba17fe0f5b2a6597d713">DNS_FLAG2_ERR_MASK</a>;
<a name="l00265"></a>00265 
<a name="l00266"></a>00266     <span class="comment">/* Check for error. If so, call callback to inform. */</span>
<a name="l00267"></a>00267     <span class="keywordflow">if</span>(namemapptr-&gt;err != 0) {
<a name="l00268"></a>00268       namemapptr-&gt;state = <a class="code" href="a00102.html#7bf0c086c7c41c12cc63324327932d91">STATE_ERROR</a>;
<a name="l00269"></a>00269       <a class="code" href="a00160.html#g6d9751d534453425c7a5a215d1d4414c">resolv_found</a>(namemapptr-&gt;name, <a class="code" href="a00160.html#g070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>);
<a name="l00270"></a>00270       <span class="keywordflow">return</span>;
<a name="l00271"></a>00271     }
<a name="l00272"></a>00272 
<a name="l00273"></a>00273     <span class="comment">/* We only care about the question(s) and the answers. The authrr</span>
<a name="l00274"></a>00274 <span class="comment">       and the extrarr are simply discarded. */</span>
<a name="l00275"></a>00275     nquestions = <a class="code" href="a00148.html#ga22b04cac8cf283ca12f028578bebc06">htons</a>(hdr-&gt;numquestions);
<a name="l00276"></a>00276     nanswers = <a class="code" href="a00148.html#ga22b04cac8cf283ca12f028578bebc06">htons</a>(hdr-&gt;numanswers);
<a name="l00277"></a>00277 
<a name="l00278"></a>00278     <span class="comment">/* Skip the name in the question. XXX: This should really be</span>
<a name="l00279"></a>00279 <span class="comment">       checked agains the name in the question, to be sure that they</span>
<a name="l00280"></a>00280 <span class="comment">       match. */</span>
<a name="l00281"></a>00281     nameptr = parse_name((<span class="keywordtype">char</span> *)<a class="code" href="a00150.html#g561b8eda32e059d4e7397f776268cc63">uip_appdata</a> + 12) + 4;
<a name="l00282"></a>00282 
<a name="l00283"></a>00283     <span class="keywordflow">while</span>(nanswers &gt; 0) {
<a name="l00284"></a>00284       <span class="comment">/* The first byte in the answer resource record determines if it</span>
<a name="l00285"></a>00285 <span class="comment">         is a compressed record or a normal one. */</span>
<a name="l00286"></a>00286       <span class="keywordflow">if</span>(*nameptr &amp; 0xc0) {
<a name="l00287"></a>00287         <span class="comment">/* Compressed name. */</span>
<a name="l00288"></a>00288         nameptr +=2;
<a name="l00289"></a>00289         <span class="comment">/*      printf("Compressed anwser\n");*/</span>
<a name="l00290"></a>00290       } <span class="keywordflow">else</span> {
<a name="l00291"></a>00291         <span class="comment">/* Not compressed name. */</span>
<a name="l00292"></a>00292         nameptr = parse_name((<span class="keywordtype">char</span> *)nameptr);
<a name="l00293"></a>00293       }
<a name="l00294"></a>00294 
<a name="l00295"></a>00295       ans = (<span class="keyword">struct </span>dns_answer *)nameptr;
<a name="l00296"></a>00296       <span class="comment">/*      printf("Answer: type %x, class %x, ttl %x, length %x\n",</span>
<a name="l00297"></a>00297 <span class="comment">             htons(ans-&gt;type), htons(ans-&gt;class), (htons(ans-&gt;ttl[0])</span>
<a name="l00298"></a>00298 <span class="comment">             &lt;&lt; 16) | htons(ans-&gt;ttl[1]), htons(ans-&gt;len));*/</span>
<a name="l00299"></a>00299 
<a name="l00300"></a>00300       <span class="comment">/* Check for IP address type and Internet class. Others are</span>
<a name="l00301"></a>00301 <span class="comment">         discarded. */</span>
<a name="l00302"></a>00302       <span class="keywordflow">if</span>(ans-&gt;type == <a class="code" href="a00148.html#g69a7a4951ff21b302267532c21ee78fc">HTONS</a>(1) &amp;&amp;
<a name="l00303"></a>00303          ans-&gt;class == <a class="code" href="a00148.html#g69a7a4951ff21b302267532c21ee78fc">HTONS</a>(1) &amp;&amp;
<a name="l00304"></a>00304          ans-&gt;len == <a class="code" href="a00148.html#g69a7a4951ff21b302267532c21ee78fc">HTONS</a>(4)) {
<a name="l00305"></a>00305         <span class="comment">/*      printf("IP address %d.%d.%d.%d\n",</span>
<a name="l00306"></a>00306 <span class="comment">               htons(ans-&gt;ipaddr[0]) &gt;&gt; 8,</span>
<a name="l00307"></a>00307 <span class="comment">               htons(ans-&gt;ipaddr[0]) &amp; 0xff,</span>
<a name="l00308"></a>00308 <span class="comment">               htons(ans-&gt;ipaddr[1]) &gt;&gt; 8,</span>
<a name="l00309"></a>00309 <span class="comment">               htons(ans-&gt;ipaddr[1]) &amp; 0xff);*/</span>
<a name="l00310"></a>00310         <span class="comment">/* XXX: we should really check that this IP address is the one</span>
<a name="l00311"></a>00311 <span class="comment">           we want. */</span>
<a name="l00312"></a>00312         namemapptr-&gt;ipaddr[0] = ans-&gt;ipaddr[0];
<a name="l00313"></a>00313         namemapptr-&gt;ipaddr[1] = ans-&gt;ipaddr[1];
<a name="l00314"></a>00314         
<a name="l00315"></a>00315         <a class="code" href="a00160.html#g6d9751d534453425c7a5a215d1d4414c">resolv_found</a>(namemapptr-&gt;name, namemapptr-&gt;ipaddr);
<a name="l00316"></a>00316         <span class="keywordflow">return</span>;
<a name="l00317"></a>00317       } <span class="keywordflow">else</span> {
<a name="l00318"></a>00318         nameptr = nameptr + 10 + <a class="code" href="a00148.html#ga22b04cac8cf283ca12f028578bebc06">htons</a>(ans-&gt;len);
<a name="l00319"></a>00319       }
<a name="l00320"></a>00320       --nanswers;
<a name="l00321"></a>00321     }
<a name="l00322"></a>00322   }
<a name="l00323"></a>00323 
<a name="l00324"></a>00324 }
<a name="l00325"></a>00325 <span class="comment">/*---------------------------------------------------------------------------*/</span><span class="comment"></span>
<a name="l00326"></a>00326 <span class="comment">/** \internal</span>
<a name="l00327"></a>00327 <span class="comment"> * The main UDP function.</span>
<a name="l00328"></a>00328 <span class="comment"> */</span>
<a name="l00329"></a>00329 <span class="comment">/*---------------------------------------------------------------------------*/</span>
<a name="l00330"></a>00330 <span class="keywordtype">void</span>
<a name="l00331"></a><a class="code" href="a00160.html#g7c5359305008e9183b18d6ab75f568bf">00331</a> <a class="code" href="a00160.html#g7c5359305008e9183b18d6ab75f568bf">resolv_appcall</a>(<span class="keywordtype">void</span>)
<a name="l00332"></a>00332 {
<a name="l00333"></a>00333   <span class="keywordflow">if</span>(<a class="code" href="a00095.html">uip_udp_conn</a>-&gt;rport == <a class="code" href="a00148.html#g69a7a4951ff21b302267532c21ee78fc">HTONS</a>(53)) {
<a name="l00334"></a>00334     <span class="keywordflow">if</span>(<a class="code" href="a00147.html#g58bb90796c1cdad3aac2ecf44d87b20e">uip_poll</a>()) {
<a name="l00335"></a>00335       check_entries();
<a name="l00336"></a>00336     }
<a name="l00337"></a>00337     <span class="keywordflow">if</span>(<a class="code" href="a00147.html#g26a14b8dae3f861830af9e7cf1e03725">uip_newdata</a>()) {
<a name="l00338"></a>00338       newdata();
<a name="l00339"></a>00339     }
<a name="l00340"></a>00340   }
<a name="l00341"></a>00341 }
<a name="l00342"></a>00342 <span class="comment">/*---------------------------------------------------------------------------*/</span><span class="comment"></span>
<a name="l00343"></a>00343 <span class="comment">/**</span>
<a name="l00344"></a>00344 <span class="comment"> * Queues a name so that a question for the name will be sent out.</span>
<a name="l00345"></a>00345 <span class="comment"> *</span>
<a name="l00346"></a>00346 <span class="comment"> * \param name The hostname that is to be queried.</span>
<a name="l00347"></a>00347 <span class="comment"> */</span>
<a name="l00348"></a>00348 <span class="comment">/*---------------------------------------------------------------------------*/</span>
<a name="l00349"></a>00349 <span class="keywordtype">void</span>
<a name="l00350"></a><a class="code" href="a00160.html#ge4dcbbe6c641d2e3b8537b479df5fc99">00350</a> <a class="code" href="a00160.html#ge4dcbbe6c641d2e3b8537b479df5fc99">resolv_query</a>(<span class="keywordtype">char</span> *name)
<a name="l00351"></a>00351 {
<a name="l00352"></a>00352   <span class="keyword">static</span> <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> i;
<a name="l00353"></a>00353   <span class="keyword">static</span> <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> lseq, lseqi;
<a name="l00354"></a>00354   <span class="keyword">register</span> <span class="keyword">struct </span>namemap *nameptr;
<a name="l00355"></a>00355       
<a name="l00356"></a>00356   lseq = lseqi = 0;
<a name="l00357"></a>00357   
<a name="l00358"></a>00358   <span class="keywordflow">for</span>(i = 0; i &lt; <a class="code" href="a00160.html#g221d37ccde7e3fd0dd2c2eb0a6b15493">RESOLV_ENTRIES</a>; ++i) {
<a name="l00359"></a>00359     nameptr = &amp;names[i];
<a name="l00360"></a>00360     <span class="keywordflow">if</span>(nameptr-&gt;state == <a class="code" href="a00102.html#ee60b8757bacab269b0ccd7c240bf01d">STATE_UNUSED</a>) {
<a name="l00361"></a>00361       <span class="keywordflow">break</span>;
<a name="l00362"></a>00362     }
<a name="l00363"></a>00363     <span class="keywordflow">if</span>(seqno - nameptr-&gt;seqno &gt; lseq) {
<a name="l00364"></a>00364       lseq = seqno - nameptr-&gt;seqno;
<a name="l00365"></a>00365       lseqi = i;
<a name="l00366"></a>00366     }
<a name="l00367"></a>00367   }
<a name="l00368"></a>00368 
<a name="l00369"></a>00369   <span class="keywordflow">if</span>(i == <a class="code" href="a00160.html#g221d37ccde7e3fd0dd2c2eb0a6b15493">RESOLV_ENTRIES</a>) {
<a name="l00370"></a>00370     i = lseqi;
<a name="l00371"></a>00371     nameptr = &amp;names[i];
<a name="l00372"></a>00372   }
<a name="l00373"></a>00373 
<a name="l00374"></a>00374   <span class="comment">/*  printf("Using entry %d\n", i);*/</span>
<a name="l00375"></a>00375 
<a name="l00376"></a>00376   strcpy(nameptr-&gt;name, name);
<a name="l00377"></a>00377   nameptr-&gt;state = <a class="code" href="a00102.html#bf4401501f1389872141a78b63f325a3">STATE_NEW</a>;
<a name="l00378"></a>00378   nameptr-&gt;seqno = seqno;
<a name="l00379"></a>00379   ++seqno;
<a name="l00380"></a>00380 }
<a name="l00381"></a>00381 <span class="comment">/*---------------------------------------------------------------------------*/</span><span class="comment"></span>
<a name="l00382"></a>00382 <span class="comment">/**</span>
<a name="l00383"></a>00383 <span class="comment"> * Look up a hostname in the array of known hostnames.</span>
<a name="l00384"></a>00384 <span class="comment"> *</span>
<a name="l00385"></a>00385 <span class="comment"> * \note This function only looks in the internal array of known</span>
<a name="l00386"></a>00386 <span class="comment"> * hostnames, it does not send out a query for the hostname if none</span>
<a name="l00387"></a>00387 <span class="comment"> * was found. The function resolv_query() can be used to send a query</span>
<a name="l00388"></a>00388 <span class="comment"> * for a hostname.</span>
<a name="l00389"></a>00389 <span class="comment"> *</span>
<a name="l00390"></a>00390 <span class="comment"> * \return A pointer to a 4-byte representation of the hostname's IP</span>
<a name="l00391"></a>00391 <span class="comment"> * address, or NULL if the hostname was not found in the array of</span>
<a name="l00392"></a>00392 <span class="comment"> * hostnames.</span>
<a name="l00393"></a>00393 <span class="comment"> */</span>
<a name="l00394"></a>00394 <span class="comment">/*---------------------------------------------------------------------------*/</span>
<a name="l00395"></a>00395 <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> *
<a name="l00396"></a><a class="code" href="a00160.html#g66d19181ad5fe8b8f7c84d1f1d46a2ec">00396</a> <a class="code" href="a00160.html#g66d19181ad5fe8b8f7c84d1f1d46a2ec">resolv_lookup</a>(<span class="keywordtype">char</span> *name)
<a name="l00397"></a>00397 {
<a name="l00398"></a>00398   <span class="keyword">static</span> <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> i;
<a name="l00399"></a>00399   <span class="keyword">struct </span>namemap *nameptr;
<a name="l00400"></a>00400   
<a name="l00401"></a>00401   <span class="comment">/* Walk through the list to see if the name is in there. If it is</span>
<a name="l00402"></a>00402 <span class="comment">     not, we return NULL. */</span>
<a name="l00403"></a>00403   <span class="keywordflow">for</span>(i = 0; i &lt; <a class="code" href="a00160.html#g221d37ccde7e3fd0dd2c2eb0a6b15493">RESOLV_ENTRIES</a>; ++i) {
<a name="l00404"></a>00404     nameptr = &amp;names[i];
<a name="l00405"></a>00405     <span class="keywordflow">if</span>(nameptr-&gt;state == <a class="code" href="a00102.html#876c82c946543cd70c141e41417138e0">STATE_DONE</a> &amp;&amp;
<a name="l00406"></a>00406        strcmp(name, nameptr-&gt;name) == 0) {
<a name="l00407"></a>00407       <span class="keywordflow">return</span> nameptr-&gt;ipaddr;
<a name="l00408"></a>00408     }
<a name="l00409"></a>00409   }
<a name="l00410"></a>00410   <span class="keywordflow">return</span> <a class="code" href="a00160.html#g070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;
<a name="l00411"></a>00411 }
<a name="l00412"></a>00412 <span class="comment">/*---------------------------------------------------------------------------*/</span><span class="comment"></span>
<a name="l00413"></a>00413 <span class="comment">/**</span>
<a name="l00414"></a>00414 <span class="comment"> * Obtain the currently configured DNS server.</span>
<a name="l00415"></a>00415 <span class="comment"> *</span>
<a name="l00416"></a>00416 <span class="comment"> * \return A pointer to a 4-byte representation of the IP address of</span>
<a name="l00417"></a>00417 <span class="comment"> * the currently configured DNS server or NULL if no DNS server has</span>
<a name="l00418"></a>00418 <span class="comment"> * been configured.</span>
<a name="l00419"></a>00419 <span class="comment"> */</span>
<a name="l00420"></a>00420 <span class="comment">/*---------------------------------------------------------------------------*/</span>
<a name="l00421"></a>00421 <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> *
<a name="l00422"></a><a class="code" href="a00160.html#g3191066cf8f76bd00b6843b77c37068f">00422</a> <a class="code" href="a00160.html#g3191066cf8f76bd00b6843b77c37068f">resolv_getserver</a>(<span class="keywordtype">void</span>)
<a name="l00423"></a>00423 {
<a name="l00424"></a>00424   <span class="keywordflow">if</span>(resolv_conn == <a class="code" href="a00160.html#g070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {
<a name="l00425"></a>00425     <span class="keywordflow">return</span> <a class="code" href="a00160.html#g070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;
<a name="l00426"></a>00426   }
<a name="l00427"></a>00427   <span class="keywordflow">return</span> resolv_conn-&gt;<a class="code" href="a00095.html#8a661a2d544100b82d0d14a1985083d5">ripaddr</a>;
<a name="l00428"></a>00428 }
<a name="l00429"></a>00429 <span class="comment">/*---------------------------------------------------------------------------*/</span><span class="comment"></span>
<a name="l00430"></a>00430 <span class="comment">/**</span>
<a name="l00431"></a>00431 <span class="comment"> * Configure which DNS server to use for queries.</span>
<a name="l00432"></a>00432 <span class="comment"> *</span>
<a name="l00433"></a>00433 <span class="comment"> * \param dnsserver A pointer to a 4-byte representation of the IP</span>
<a name="l00434"></a>00434 <span class="comment"> * address of the DNS server to be configured.</span>
<a name="l00435"></a>00435 <span class="comment"> */</span>
<a name="l00436"></a>00436 <span class="comment">/*---------------------------------------------------------------------------*/</span>
<a name="l00437"></a>00437 <span class="keywordtype">void</span>
<a name="l00438"></a><a class="code" href="a00160.html#gdf916e0c752f5cda70d0bddb2be422ba">00438</a> <a class="code" href="a00160.html#gdf916e0c752f5cda70d0bddb2be422ba">resolv_conf</a>(<a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> *dnsserver)
<a name="l00439"></a>00439 {
<a name="l00440"></a>00440   <span class="keywordflow">if</span>(resolv_conn != <a class="code" href="a00160.html#g070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {
<a name="l00441"></a>00441     <a class="code" href="a00147.html#gf2dbaceb10c67783a115075b5b6d66df">uip_udp_remove</a>(resolv_conn);
<a name="l00442"></a>00442   }
<a name="l00443"></a>00443   
<a name="l00444"></a>00444   resolv_conn = <a class="code" href="a00147.html#g79c4110211247df3fb30b8cf1c4c02af">uip_udp_new</a>(dnsserver, <a class="code" href="a00148.html#g69a7a4951ff21b302267532c21ee78fc">HTONS</a>(53));
<a name="l00445"></a>00445 }
<a name="l00446"></a>00446 <span class="comment">/*---------------------------------------------------------------------------*/</span><span class="comment"></span>
<a name="l00447"></a>00447 <span class="comment">/**</span>
<a name="l00448"></a>00448 <span class="comment"> * Initalize the resolver.</span>
<a name="l00449"></a>00449 <span class="comment"> */</span>
<a name="l00450"></a>00450 <span class="comment">/*---------------------------------------------------------------------------*/</span>
<a name="l00451"></a>00451 <span class="keywordtype">void</span>
<a name="l00452"></a><a class="code" href="a00160.html#gb50f78bbf36d912d69f6c1685d0b40e3">00452</a> <a class="code" href="a00160.html#gb50f78bbf36d912d69f6c1685d0b40e3">resolv_init</a>(<span class="keywordtype">void</span>)
<a name="l00453"></a>00453 {
<a name="l00454"></a>00454   <span class="keyword">static</span> <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> i;
<a name="l00455"></a>00455   
<a name="l00456"></a>00456   <span class="keywordflow">for</span>(i = 0; i &lt; <a class="code" href="a00160.html#g221d37ccde7e3fd0dd2c2eb0a6b15493">RESOLV_ENTRIES</a>; ++i) {
<a name="l00457"></a>00457     names[i].state = <a class="code" href="a00102.html#876c82c946543cd70c141e41417138e0">STATE_DONE</a>;
<a name="l00458"></a>00458   }
<a name="l00459"></a>00459 
<a name="l00460"></a>00460 }
<a name="l00461"></a>00461 <span class="comment">/*---------------------------------------------------------------------------*/</span>
<a name="l00462"></a>00462 <span class="comment"></span>
<a name="l00463"></a>00463 <span class="comment">/** @} */</span><span class="comment"></span>
<a name="l00464"></a>00464 <span class="comment">/** @} */</span>
</pre></div><hr size="1"><address style="align: right;"><small>Generated on Mon Jun 12 10:23:01 2006 for uIP 1.0 by&nbsp;
<a href="http://www.doxygen.org/index.html">
<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.4.6 </small></address>
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