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<h1>apps/dhcpc/dhcpc.c</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> * Copyright (c) 2005, Swedish Institute of Computer Science</span>
<a name="l00003"></a>00003 <span class="comment"> * All rights reserved.</span>
<a name="l00004"></a>00004 <span class="comment"> *</span>
<a name="l00005"></a>00005 <span class="comment"> * Redistribution and use in source and binary forms, with or without</span>
<a name="l00006"></a>00006 <span class="comment"> * modification, are permitted provided that the following conditions</span>
<a name="l00007"></a>00007 <span class="comment"> * are met:</span>
<a name="l00008"></a>00008 <span class="comment"> * 1. Redistributions of source code must retain the above copyright</span>
<a name="l00009"></a>00009 <span class="comment"> *    notice, this list of conditions and the following disclaimer.</span>
<a name="l00010"></a>00010 <span class="comment"> * 2. Redistributions in binary form must reproduce the above copyright</span>
<a name="l00011"></a>00011 <span class="comment"> *    notice, this list of conditions and the following disclaimer in the</span>
<a name="l00012"></a>00012 <span class="comment"> *    documentation and/or other materials provided with the distribution.</span>
<a name="l00013"></a>00013 <span class="comment"> * 3. Neither the name of the Institute nor the names of its contributors</span>
<a name="l00014"></a>00014 <span class="comment"> *    may be used to endorse or promote products derived from this software</span>
<a name="l00015"></a>00015 <span class="comment"> *    without specific prior written permission.</span>
<a name="l00016"></a>00016 <span class="comment"> *</span>
<a name="l00017"></a>00017 <span class="comment"> * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND</span>
<a name="l00018"></a>00018 <span class="comment"> * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE</span>
<a name="l00019"></a>00019 <span class="comment"> * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE</span>
<a name="l00020"></a>00020 <span class="comment"> * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE</span>
<a name="l00021"></a>00021 <span class="comment"> * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL</span>
<a name="l00022"></a>00022 <span class="comment"> * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS</span>
<a name="l00023"></a>00023 <span class="comment"> * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)</span>
<a name="l00024"></a>00024 <span class="comment"> * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT</span>
<a name="l00025"></a>00025 <span class="comment"> * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY</span>
<a name="l00026"></a>00026 <span class="comment"> * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF</span>
<a name="l00027"></a>00027 <span class="comment"> * SUCH DAMAGE.</span>
<a name="l00028"></a>00028 <span class="comment"> *</span>
<a name="l00029"></a>00029 <span class="comment"> * This file is part of the uIP TCP/IP stack</span>
<a name="l00030"></a>00030 <span class="comment"> *</span>
<a name="l00031"></a>00031 <span class="comment"> * @(#)$Id: dhcpc.c,v 1.2 2006/06/11 21:46:37 adam Exp $</span>
<a name="l00032"></a>00032 <span class="comment"> */</span>
<a name="l00033"></a>00033 
<a name="l00034"></a>00034 <span class="preprocessor">#include &lt;stdio.h&gt;</span>
<a name="l00035"></a>00035 <span class="preprocessor">#include &lt;string.h&gt;</span>
<a name="l00036"></a>00036 
<a name="l00037"></a>00037 <span class="preprocessor">#include "<a class="code" href="a00136.html">uip.h</a>"</span>
<a name="l00038"></a>00038 <span class="preprocessor">#include "dhcpc.h"</span>
<a name="l00039"></a>00039 <span class="preprocessor">#include "<a class="code" href="a00130.html">timer.h</a>"</span>
<a name="l00040"></a>00040 <span class="preprocessor">#include "<a class="code" href="a00128.html">pt.h</a>"</span>
<a name="l00041"></a>00041 
<a name="l00042"></a>00042 <span class="preprocessor">#define STATE_INITIAL         0</span>
<a name="l00043"></a>00043 <span class="preprocessor"></span><span class="preprocessor">#define STATE_SENDING         1</span>
<a name="l00044"></a>00044 <span class="preprocessor"></span><span class="preprocessor">#define STATE_OFFER_RECEIVED  2</span>
<a name="l00045"></a>00045 <span class="preprocessor"></span><span class="preprocessor">#define STATE_CONFIG_RECEIVED 3</span>
<a name="l00046"></a>00046 <span class="preprocessor"></span>
<a name="l00047"></a>00047 <span class="keyword">static</span> <span class="keyword">struct </span><a class="code" href="a00077.html">dhcpc_state</a> s;
<a name="l00048"></a>00048 
<a name="l00049"></a>00049 <span class="keyword">struct </span>dhcp_msg {
<a name="l00050"></a>00050   <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> op, htype, hlen, hops;
<a name="l00051"></a>00051   <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> xid[4];
<a name="l00052"></a>00052   <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> secs, flags;
<a name="l00053"></a>00053   <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> ciaddr[4];
<a name="l00054"></a>00054   <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> yiaddr[4];
<a name="l00055"></a>00055   <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> siaddr[4];
<a name="l00056"></a>00056   <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> giaddr[4];
<a name="l00057"></a>00057   <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> chaddr[16];
<a name="l00058"></a>00058 <span class="preprocessor">#ifndef UIP_CONF_DHCP_LIGHT</span>
<a name="l00059"></a>00059 <span class="preprocessor"></span>  <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> sname[64];
<a name="l00060"></a>00060   <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> file[128];
<a name="l00061"></a>00061 <span class="preprocessor">#endif</span>
<a name="l00062"></a>00062 <span class="preprocessor"></span>  <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> options[312];
<a name="l00063"></a>00063 };
<a name="l00064"></a>00064 
<a name="l00065"></a>00065 <span class="preprocessor">#define BOOTP_BROADCAST 0x8000</span>
<a name="l00066"></a>00066 <span class="preprocessor"></span>
<a name="l00067"></a>00067 <span class="preprocessor">#define DHCP_REQUEST        1</span>
<a name="l00068"></a>00068 <span class="preprocessor"></span><span class="preprocessor">#define DHCP_REPLY          2</span>
<a name="l00069"></a>00069 <span class="preprocessor"></span><span class="preprocessor">#define DHCP_HTYPE_ETHERNET 1</span>
<a name="l00070"></a>00070 <span class="preprocessor"></span><span class="preprocessor">#define DHCP_HLEN_ETHERNET  6</span>
<a name="l00071"></a>00071 <span class="preprocessor"></span><span class="preprocessor">#define DHCP_MSG_LEN      236</span>
<a name="l00072"></a>00072 <span class="preprocessor"></span>
<a name="l00073"></a>00073 <span class="preprocessor">#define DHCPC_SERVER_PORT  67</span>
<a name="l00074"></a>00074 <span class="preprocessor"></span><span class="preprocessor">#define DHCPC_CLIENT_PORT  68</span>
<a name="l00075"></a>00075 <span class="preprocessor"></span>
<a name="l00076"></a>00076 <span class="preprocessor">#define DHCPDISCOVER  1</span>
<a name="l00077"></a>00077 <span class="preprocessor"></span><span class="preprocessor">#define DHCPOFFER     2</span>
<a name="l00078"></a>00078 <span class="preprocessor"></span><span class="preprocessor">#define DHCPREQUEST   3</span>
<a name="l00079"></a>00079 <span class="preprocessor"></span><span class="preprocessor">#define DHCPDECLINE   4</span>
<a name="l00080"></a>00080 <span class="preprocessor"></span><span class="preprocessor">#define DHCPACK       5</span>
<a name="l00081"></a>00081 <span class="preprocessor"></span><span class="preprocessor">#define DHCPNAK       6</span>
<a name="l00082"></a>00082 <span class="preprocessor"></span><span class="preprocessor">#define DHCPRELEASE   7</span>
<a name="l00083"></a>00083 <span class="preprocessor"></span>
<a name="l00084"></a>00084 <span class="preprocessor">#define DHCP_OPTION_SUBNET_MASK   1</span>
<a name="l00085"></a>00085 <span class="preprocessor"></span><span class="preprocessor">#define DHCP_OPTION_ROUTER        3</span>
<a name="l00086"></a>00086 <span class="preprocessor"></span><span class="preprocessor">#define DHCP_OPTION_DNS_SERVER    6</span>
<a name="l00087"></a>00087 <span class="preprocessor"></span><span class="preprocessor">#define DHCP_OPTION_REQ_IPADDR   50</span>
<a name="l00088"></a>00088 <span class="preprocessor"></span><span class="preprocessor">#define DHCP_OPTION_LEASE_TIME   51</span>
<a name="l00089"></a>00089 <span class="preprocessor"></span><span class="preprocessor">#define DHCP_OPTION_MSG_TYPE     53</span>
<a name="l00090"></a>00090 <span class="preprocessor"></span><span class="preprocessor">#define DHCP_OPTION_SERVER_ID    54</span>
<a name="l00091"></a>00091 <span class="preprocessor"></span><span class="preprocessor">#define DHCP_OPTION_REQ_LIST     55</span>
<a name="l00092"></a>00092 <span class="preprocessor"></span><span class="preprocessor">#define DHCP_OPTION_END         255</span>
<a name="l00093"></a>00093 <span class="preprocessor"></span>
<a name="l00094"></a>00094 <span class="keyword">static</span> <span class="keyword">const</span> <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> xid[4] = {0xad, 0xde, 0x12, 0x23};
<a name="l00095"></a>00095 <span class="keyword">static</span> <span class="keyword">const</span> <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> magic_cookie[4] = {99, 130, 83, 99};
<a name="l00096"></a>00096 <span class="comment">/*---------------------------------------------------------------------------*/</span>
<a name="l00097"></a>00097 <span class="keyword">static</span> <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *
<a name="l00098"></a>00098 add_msg_type(<a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *optptr, <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> type)
<a name="l00099"></a>00099 {
<a name="l00100"></a>00100   *optptr++ = DHCP_OPTION_MSG_TYPE;
<a name="l00101"></a>00101   *optptr++ = 1;
<a name="l00102"></a>00102   *optptr++ = type;
<a name="l00103"></a>00103   <span class="keywordflow">return</span> optptr;
<a name="l00104"></a>00104 }
<a name="l00105"></a>00105 <span class="comment">/*---------------------------------------------------------------------------*/</span>
<a name="l00106"></a>00106 <span class="keyword">static</span> <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *
<a name="l00107"></a>00107 add_server_id(<a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *optptr)
<a name="l00108"></a>00108 {
<a name="l00109"></a>00109   *optptr++ = DHCP_OPTION_SERVER_ID;
<a name="l00110"></a>00110   *optptr++ = 4;
<a name="l00111"></a>00111   memcpy(optptr, s.<a class="code" href="a00077.html#564bab93ef6a268a5de2fab885c1d32a">serverid</a>, 4);
<a name="l00112"></a>00112   <span class="keywordflow">return</span> optptr + 4;
<a name="l00113"></a>00113 }
<a name="l00114"></a>00114 <span class="comment">/*---------------------------------------------------------------------------*/</span>
<a name="l00115"></a>00115 <span class="keyword">static</span> <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *
<a name="l00116"></a>00116 add_req_ipaddr(<a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *optptr)
<a name="l00117"></a>00117 {
<a name="l00118"></a>00118   *optptr++ = DHCP_OPTION_REQ_IPADDR;
<a name="l00119"></a>00119   *optptr++ = 4;
<a name="l00120"></a>00120   memcpy(optptr, s.<a class="code" href="a00077.html#1d2f2751b0865045486c9aa59d0d0971">ipaddr</a>, 4);
<a name="l00121"></a>00121   <span class="keywordflow">return</span> optptr + 4;
<a name="l00122"></a>00122 }
<a name="l00123"></a>00123 <span class="comment">/*---------------------------------------------------------------------------*/</span>
<a name="l00124"></a>00124 <span class="keyword">static</span> <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *
<a name="l00125"></a>00125 add_req_options(<a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *optptr)
<a name="l00126"></a>00126 {
<a name="l00127"></a>00127   *optptr++ = DHCP_OPTION_REQ_LIST;
<a name="l00128"></a>00128   *optptr++ = 3;
<a name="l00129"></a>00129   *optptr++ = DHCP_OPTION_SUBNET_MASK;
<a name="l00130"></a>00130   *optptr++ = DHCP_OPTION_ROUTER;
<a name="l00131"></a>00131   *optptr++ = DHCP_OPTION_DNS_SERVER;
<a name="l00132"></a>00132   <span class="keywordflow">return</span> optptr;
<a name="l00133"></a>00133 }
<a name="l00134"></a>00134 <span class="comment">/*---------------------------------------------------------------------------*/</span>
<a name="l00135"></a>00135 <span class="keyword">static</span> <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *
<a name="l00136"></a>00136 add_end(<a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *optptr)
<a name="l00137"></a>00137 {
<a name="l00138"></a>00138   *optptr++ = DHCP_OPTION_END;
<a name="l00139"></a>00139   <span class="keywordflow">return</span> optptr;
<a name="l00140"></a>00140 }
<a name="l00141"></a>00141 <span class="comment">/*---------------------------------------------------------------------------*/</span>
<a name="l00142"></a>00142 <span class="keyword">static</span> <span class="keywordtype">void</span>
<a name="l00143"></a>00143 create_msg(<span class="keyword">register</span> <span class="keyword">struct</span> dhcp_msg *m)
<a name="l00144"></a>00144 {
<a name="l00145"></a>00145   m-&gt;op = DHCP_REQUEST;
<a name="l00146"></a>00146   m-&gt;htype = DHCP_HTYPE_ETHERNET;
<a name="l00147"></a>00147   m-&gt;hlen = s.<a class="code" href="a00077.html#5361ef75bfbdb469b5cc31f0060a2670">mac_len</a>;
<a name="l00148"></a>00148   m-&gt;hops = 0;
<a name="l00149"></a>00149   memcpy(m-&gt;xid, xid, <span class="keyword">sizeof</span>(m-&gt;xid));
<a name="l00150"></a>00150   m-&gt;secs = 0;
<a name="l00151"></a>00151   m-&gt;flags = <a class="code" href="a00148.html#g69a7a4951ff21b302267532c21ee78fc">HTONS</a>(BOOTP_BROADCAST); <span class="comment">/*  Broadcast bit. */</span>
<a name="l00152"></a>00152   <span class="comment">/*  uip_ipaddr_copy(m-&gt;ciaddr, uip_hostaddr);*/</span>
<a name="l00153"></a>00153   memcpy(m-&gt;ciaddr, <a class="code" href="a00150.html#g7d3673f52f5846b6961d23b150decd54">uip_hostaddr</a>, <span class="keyword">sizeof</span>(m-&gt;ciaddr));
<a name="l00154"></a>00154   memset(m-&gt;yiaddr, 0, <span class="keyword">sizeof</span>(m-&gt;yiaddr));
<a name="l00155"></a>00155   memset(m-&gt;siaddr, 0, <span class="keyword">sizeof</span>(m-&gt;siaddr));
<a name="l00156"></a>00156   memset(m-&gt;giaddr, 0, <span class="keyword">sizeof</span>(m-&gt;giaddr));
<a name="l00157"></a>00157   memcpy(m-&gt;chaddr, s.<a class="code" href="a00077.html#2391bb18db5f620e0e9fb848ae5ba5e9">mac_addr</a>, s.<a class="code" href="a00077.html#5361ef75bfbdb469b5cc31f0060a2670">mac_len</a>);
<a name="l00158"></a>00158   memset(&amp;m-&gt;chaddr[s.<a class="code" href="a00077.html#5361ef75bfbdb469b5cc31f0060a2670">mac_len</a>], 0, <span class="keyword">sizeof</span>(m-&gt;chaddr) - s.<a class="code" href="a00077.html#5361ef75bfbdb469b5cc31f0060a2670">mac_len</a>);
<a name="l00159"></a>00159 <span class="preprocessor">#ifndef UIP_CONF_DHCP_LIGHT</span>
<a name="l00160"></a>00160 <span class="preprocessor"></span>  memset(m-&gt;sname, 0, <span class="keyword">sizeof</span>(m-&gt;sname));
<a name="l00161"></a>00161   memset(m-&gt;file, 0, <span class="keyword">sizeof</span>(m-&gt;file));
<a name="l00162"></a>00162 <span class="preprocessor">#endif</span>
<a name="l00163"></a>00163 <span class="preprocessor"></span>
<a name="l00164"></a>00164   memcpy(m-&gt;options, magic_cookie, <span class="keyword">sizeof</span>(magic_cookie));
<a name="l00165"></a>00165 }
<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 send_discover(<span class="keywordtype">void</span>)
<a name="l00169"></a>00169 {
<a name="l00170"></a>00170   <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *end;
<a name="l00171"></a>00171   <span class="keyword">struct </span>dhcp_msg *m = (<span class="keyword">struct </span>dhcp_msg *)<a class="code" href="a00150.html#g561b8eda32e059d4e7397f776268cc63">uip_appdata</a>;
<a name="l00172"></a>00172 
<a name="l00173"></a>00173   create_msg(m);
<a name="l00174"></a>00174 
<a name="l00175"></a>00175   end = add_msg_type(&amp;m-&gt;options[4], DHCPDISCOVER);
<a name="l00176"></a>00176   end = add_req_options(end);
<a name="l00177"></a>00177   end = add_end(end);
<a name="l00178"></a>00178 
<a name="l00179"></a>00179   <a class="code" href="a00147.html#g04b053a623aac7cd4195157d470661b3">uip_send</a>(<a class="code" href="a00150.html#g561b8eda32e059d4e7397f776268cc63">uip_appdata</a>, end - (<a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *)<a class="code" href="a00150.html#g561b8eda32e059d4e7397f776268cc63">uip_appdata</a>);
<a name="l00180"></a>00180 }
<a name="l00181"></a>00181 <span class="comment">/*---------------------------------------------------------------------------*/</span>
<a name="l00182"></a>00182 <span class="keyword">static</span> <span class="keywordtype">void</span>
<a name="l00183"></a>00183 send_request(<span class="keywordtype">void</span>)
<a name="l00184"></a>00184 {
<a name="l00185"></a>00185   <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *end;
<a name="l00186"></a>00186   <span class="keyword">struct </span>dhcp_msg *m = (<span class="keyword">struct </span>dhcp_msg *)<a class="code" href="a00150.html#g561b8eda32e059d4e7397f776268cc63">uip_appdata</a>;
<a name="l00187"></a>00187 
<a name="l00188"></a>00188   create_msg(m);
<a name="l00189"></a>00189   
<a name="l00190"></a>00190   end = add_msg_type(&amp;m-&gt;options[4], DHCPREQUEST);
<a name="l00191"></a>00191   end = add_server_id(end);
<a name="l00192"></a>00192   end = add_req_ipaddr(end);
<a name="l00193"></a>00193   end = add_end(end);
<a name="l00194"></a>00194   
<a name="l00195"></a>00195   <a class="code" href="a00147.html#g04b053a623aac7cd4195157d470661b3">uip_send</a>(<a class="code" href="a00150.html#g561b8eda32e059d4e7397f776268cc63">uip_appdata</a>, end - (<a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *)<a class="code" href="a00150.html#g561b8eda32e059d4e7397f776268cc63">uip_appdata</a>);
<a name="l00196"></a>00196 }
<a name="l00197"></a>00197 <span class="comment">/*---------------------------------------------------------------------------*/</span>
<a name="l00198"></a>00198 <span class="keyword">static</span> <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a>
<a name="l00199"></a>00199 parse_options(<a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *optptr, <span class="keywordtype">int</span> len)
<a name="l00200"></a>00200 {
<a name="l00201"></a>00201   <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *end = optptr + len;
<a name="l00202"></a>00202   <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> type = 0;
<a name="l00203"></a>00203 
<a name="l00204"></a>00204   <span class="keywordflow">while</span>(optptr &lt; end) {
<a name="l00205"></a>00205     <span class="keywordflow">switch</span>(*optptr) {
<a name="l00206"></a>00206     <span class="keywordflow">case</span> DHCP_OPTION_SUBNET_MASK:
<a name="l00207"></a>00207       memcpy(s.<a class="code" href="a00077.html#20541305548441e5dcb2e1e7e6f300eb">netmask</a>, optptr + 2, 4);
<a name="l00208"></a>00208       <span class="keywordflow">break</span>;
<a name="l00209"></a>00209     <span class="keywordflow">case</span> DHCP_OPTION_ROUTER:
<a name="l00210"></a>00210       memcpy(s.<a class="code" href="a00077.html#5e16ca335dfd7394527f602da879fca2">default_router</a>, optptr + 2, 4);
<a name="l00211"></a>00211       <span class="keywordflow">break</span>;
<a name="l00212"></a>00212     <span class="keywordflow">case</span> DHCP_OPTION_DNS_SERVER:
<a name="l00213"></a>00213       memcpy(s.<a class="code" href="a00077.html#27df2817055bc099821d96eb60a40b34">dnsaddr</a>, optptr + 2, 4);
<a name="l00214"></a>00214       <span class="keywordflow">break</span>;
<a name="l00215"></a>00215     <span class="keywordflow">case</span> DHCP_OPTION_MSG_TYPE:
<a name="l00216"></a>00216       type = *(optptr + 2);
<a name="l00217"></a>00217       <span class="keywordflow">break</span>;
<a name="l00218"></a>00218     <span class="keywordflow">case</span> DHCP_OPTION_SERVER_ID:
<a name="l00219"></a>00219       memcpy(s.<a class="code" href="a00077.html#564bab93ef6a268a5de2fab885c1d32a">serverid</a>, optptr + 2, 4);
<a name="l00220"></a>00220       <span class="keywordflow">break</span>;
<a name="l00221"></a>00221     <span class="keywordflow">case</span> DHCP_OPTION_LEASE_TIME:
<a name="l00222"></a>00222       memcpy(s.<a class="code" href="a00077.html#7a520a57d7d0541524f34a7685635597">lease_time</a>, optptr + 2, 4);
<a name="l00223"></a>00223       <span class="keywordflow">break</span>;
<a name="l00224"></a>00224     <span class="keywordflow">case</span> DHCP_OPTION_END:
<a name="l00225"></a>00225       <span class="keywordflow">return</span> type;
<a name="l00226"></a>00226     }
<a name="l00227"></a>00227 
<a name="l00228"></a>00228     optptr += optptr[1] + 2;
<a name="l00229"></a>00229   }
<a name="l00230"></a>00230   <span class="keywordflow">return</span> type;
<a name="l00231"></a>00231 }
<a name="l00232"></a>00232 <span class="comment">/*---------------------------------------------------------------------------*/</span>
<a name="l00233"></a>00233 <span class="keyword">static</span> <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a>
<a name="l00234"></a>00234 parse_msg(<span class="keywordtype">void</span>)
<a name="l00235"></a>00235 {
<a name="l00236"></a>00236   <span class="keyword">struct </span>dhcp_msg *m = (<span class="keyword">struct </span>dhcp_msg *)<a class="code" href="a00150.html#g561b8eda32e059d4e7397f776268cc63">uip_appdata</a>;
<a name="l00237"></a>00237   
<a name="l00238"></a>00238   <span class="keywordflow">if</span>(m-&gt;op == DHCP_REPLY &amp;&amp;
<a name="l00239"></a>00239      memcmp(m-&gt;xid, xid, <span class="keyword">sizeof</span>(xid)) == 0 &amp;&amp;
<a name="l00240"></a>00240      memcmp(m-&gt;chaddr, s.<a class="code" href="a00077.html#2391bb18db5f620e0e9fb848ae5ba5e9">mac_addr</a>, s.<a class="code" href="a00077.html#5361ef75bfbdb469b5cc31f0060a2670">mac_len</a>) == 0) {
<a name="l00241"></a>00241     memcpy(s.<a class="code" href="a00077.html#1d2f2751b0865045486c9aa59d0d0971">ipaddr</a>, m-&gt;yiaddr, 4);
<a name="l00242"></a>00242     <span class="keywordflow">return</span> parse_options(&amp;m-&gt;options[4], <a class="code" href="a00147.html#g1a1bc437c09ddef238abab41d77c3177">uip_datalen</a>());
<a name="l00243"></a>00243   }
<a name="l00244"></a>00244   <span class="keywordflow">return</span> 0;
<a name="l00245"></a>00245 }
<a name="l00246"></a>00246 <span class="comment">/*---------------------------------------------------------------------------*/</span>
<a name="l00247"></a>00247 <span class="keyword">static</span>
<a name="l00248"></a>00248 <a class="code" href="a00142.html#g3d4c8bd4aada659eb34f5d2ffd3e7901">PT_THREAD</a>(handle_dhcp(<span class="keywordtype">void</span>))
<a name="l00249"></a>00249 {
<a name="l00250"></a>00250   <a class="code" href="a00142.html#g2ffbb9e554e08a343ae2f9de4bedfdfc">PT_BEGIN</a>(&amp;s.<a class="code" href="a00077.html#31471b5e27bda51832d0fa49bd6d9b54">pt</a>);
<a name="l00251"></a>00251   
<a name="l00252"></a>00252   <span class="comment">/* try_again:*/</span>
<a name="l00253"></a>00253   s.<a class="code" href="a00077.html#e0b137a3875ad12a99e5e3e0e177fd12">state</a> = STATE_SENDING;
<a name="l00254"></a>00254   s.<a class="code" href="a00077.html#e707c39412e09d3a47f0b3c5dad33725">ticks</a> = <a class="code" href="a00157.html#ge3ced0551b26c9b99cb45a86f34d100a">CLOCK_SECOND</a>;
<a name="l00255"></a>00255 
<a name="l00256"></a>00256   <span class="keywordflow">do</span> {
<a name="l00257"></a>00257     send_discover();
<a name="l00258"></a>00258     <a class="code" href="a00156.html#g6614d96fdfcd95c95ec6e6f63071ff51">timer_set</a>(&amp;s.<a class="code" href="a00077.html#e80af46ceef63eab3c786525370ae720">timer</a>, s.<a class="code" href="a00077.html#e707c39412e09d3a47f0b3c5dad33725">ticks</a>);
<a name="l00259"></a>00259     <a class="code" href="a00142.html#g99e43010ec61327164466aa2d902de45">PT_WAIT_UNTIL</a>(&amp;s.<a class="code" href="a00077.html#31471b5e27bda51832d0fa49bd6d9b54">pt</a>, <a class="code" href="a00147.html#g26a14b8dae3f861830af9e7cf1e03725">uip_newdata</a>() || <a class="code" href="a00156.html#g6d71dececfce707c668e6257aad5906e">timer_expired</a>(&amp;s.<a class="code" href="a00077.html#e80af46ceef63eab3c786525370ae720">timer</a>));
<a name="l00260"></a>00260 
<a name="l00261"></a>00261     <span class="keywordflow">if</span>(<a class="code" href="a00147.html#g26a14b8dae3f861830af9e7cf1e03725">uip_newdata</a>() &amp;&amp; parse_msg() == DHCPOFFER) {
<a name="l00262"></a>00262       s.<a class="code" href="a00077.html#e0b137a3875ad12a99e5e3e0e177fd12">state</a> = STATE_OFFER_RECEIVED;
<a name="l00263"></a>00263       <span class="keywordflow">break</span>;
<a name="l00264"></a>00264     }
<a name="l00265"></a>00265 
<a name="l00266"></a>00266     <span class="keywordflow">if</span>(s.<a class="code" href="a00077.html#e707c39412e09d3a47f0b3c5dad33725">ticks</a> &lt; <a class="code" href="a00157.html#ge3ced0551b26c9b99cb45a86f34d100a">CLOCK_SECOND</a> * 60) {
<a name="l00267"></a>00267       s.<a class="code" href="a00077.html#e707c39412e09d3a47f0b3c5dad33725">ticks</a> *= 2;
<a name="l00268"></a>00268     }
<a name="l00269"></a>00269   } <span class="keywordflow">while</span>(s.<a class="code" href="a00077.html#e0b137a3875ad12a99e5e3e0e177fd12">state</a> != STATE_OFFER_RECEIVED);
<a name="l00270"></a>00270   
<a name="l00271"></a>00271   s.<a class="code" href="a00077.html#e707c39412e09d3a47f0b3c5dad33725">ticks</a> = <a class="code" href="a00157.html#ge3ced0551b26c9b99cb45a86f34d100a">CLOCK_SECOND</a>;
<a name="l00272"></a>00272 
<a name="l00273"></a>00273   <span class="keywordflow">do</span> {
<a name="l00274"></a>00274     send_request();
<a name="l00275"></a>00275     <a class="code" href="a00156.html#g6614d96fdfcd95c95ec6e6f63071ff51">timer_set</a>(&amp;s.<a class="code" href="a00077.html#e80af46ceef63eab3c786525370ae720">timer</a>, s.<a class="code" href="a00077.html#e707c39412e09d3a47f0b3c5dad33725">ticks</a>);
<a name="l00276"></a>00276     <a class="code" href="a00142.html#g99e43010ec61327164466aa2d902de45">PT_WAIT_UNTIL</a>(&amp;s.<a class="code" href="a00077.html#31471b5e27bda51832d0fa49bd6d9b54">pt</a>, <a class="code" href="a00147.html#g26a14b8dae3f861830af9e7cf1e03725">uip_newdata</a>() || <a class="code" href="a00156.html#g6d71dececfce707c668e6257aad5906e">timer_expired</a>(&amp;s.<a class="code" href="a00077.html#e80af46ceef63eab3c786525370ae720">timer</a>));
<a name="l00277"></a>00277 
<a name="l00278"></a>00278     <span class="keywordflow">if</span>(<a class="code" href="a00147.html#g26a14b8dae3f861830af9e7cf1e03725">uip_newdata</a>() &amp;&amp; parse_msg() == DHCPACK) {
<a name="l00279"></a>00279       s.<a class="code" href="a00077.html#e0b137a3875ad12a99e5e3e0e177fd12">state</a> = STATE_CONFIG_RECEIVED;
<a name="l00280"></a>00280       <span class="keywordflow">break</span>;
<a name="l00281"></a>00281     }
<a name="l00282"></a>00282 
<a name="l00283"></a>00283     <span class="keywordflow">if</span>(s.<a class="code" href="a00077.html#e707c39412e09d3a47f0b3c5dad33725">ticks</a> &lt;= <a class="code" href="a00157.html#ge3ced0551b26c9b99cb45a86f34d100a">CLOCK_SECOND</a> * 10) {
<a name="l00284"></a>00284       s.<a class="code" href="a00077.html#e707c39412e09d3a47f0b3c5dad33725">ticks</a> += <a class="code" href="a00157.html#ge3ced0551b26c9b99cb45a86f34d100a">CLOCK_SECOND</a>;
<a name="l00285"></a>00285     } <span class="keywordflow">else</span> {
<a name="l00286"></a>00286       <a class="code" href="a00142.html#gcd3ac045f0a4ae63412e3b3d8780e8ab">PT_RESTART</a>(&amp;s.<a class="code" href="a00077.html#31471b5e27bda51832d0fa49bd6d9b54">pt</a>);
<a name="l00287"></a>00287     }
<a name="l00288"></a>00288   } <span class="keywordflow">while</span>(s.<a class="code" href="a00077.html#e0b137a3875ad12a99e5e3e0e177fd12">state</a> != STATE_CONFIG_RECEIVED);
<a name="l00289"></a>00289   
<a name="l00290"></a>00290 <span class="preprocessor">#if 0</span>
<a name="l00291"></a>00291 <span class="preprocessor"></span>  printf(<span class="stringliteral">"Got IP address %d.%d.%d.%d\n"</span>,
<a name="l00292"></a>00292          <a class="code" href="a00148.html#g22fa0681cd463191d7a01fe85d86996f">uip_ipaddr1</a>(s.<a class="code" href="a00077.html#1d2f2751b0865045486c9aa59d0d0971">ipaddr</a>), <a class="code" href="a00148.html#gffcd2fbe181e2aaefbf970551c302af5">uip_ipaddr2</a>(s.<a class="code" href="a00077.html#1d2f2751b0865045486c9aa59d0d0971">ipaddr</a>),
<a name="l00293"></a>00293          <a class="code" href="a00148.html#ge23534479ead15af8ff08ace26a47fb5">uip_ipaddr3</a>(s.<a class="code" href="a00077.html#1d2f2751b0865045486c9aa59d0d0971">ipaddr</a>), <a class="code" href="a00148.html#g165b603ec150e26efec7be199c9c2901">uip_ipaddr4</a>(s.<a class="code" href="a00077.html#1d2f2751b0865045486c9aa59d0d0971">ipaddr</a>));
<a name="l00294"></a>00294   printf(<span class="stringliteral">"Got netmask %d.%d.%d.%d\n"</span>,
<a name="l00295"></a>00295          <a class="code" href="a00148.html#g22fa0681cd463191d7a01fe85d86996f">uip_ipaddr1</a>(s.<a class="code" href="a00077.html#20541305548441e5dcb2e1e7e6f300eb">netmask</a>), <a class="code" href="a00148.html#gffcd2fbe181e2aaefbf970551c302af5">uip_ipaddr2</a>(s.<a class="code" href="a00077.html#20541305548441e5dcb2e1e7e6f300eb">netmask</a>),
<a name="l00296"></a>00296          <a class="code" href="a00148.html#ge23534479ead15af8ff08ace26a47fb5">uip_ipaddr3</a>(s.<a class="code" href="a00077.html#20541305548441e5dcb2e1e7e6f300eb">netmask</a>), <a class="code" href="a00148.html#g165b603ec150e26efec7be199c9c2901">uip_ipaddr4</a>(s.<a class="code" href="a00077.html#20541305548441e5dcb2e1e7e6f300eb">netmask</a>));
<a name="l00297"></a>00297   printf(<span class="stringliteral">"Got DNS server %d.%d.%d.%d\n"</span>,
<a name="l00298"></a>00298          <a class="code" href="a00148.html#g22fa0681cd463191d7a01fe85d86996f">uip_ipaddr1</a>(s.<a class="code" href="a00077.html#27df2817055bc099821d96eb60a40b34">dnsaddr</a>), <a class="code" href="a00148.html#gffcd2fbe181e2aaefbf970551c302af5">uip_ipaddr2</a>(s.<a class="code" href="a00077.html#27df2817055bc099821d96eb60a40b34">dnsaddr</a>),
<a name="l00299"></a>00299          <a class="code" href="a00148.html#ge23534479ead15af8ff08ace26a47fb5">uip_ipaddr3</a>(s.<a class="code" href="a00077.html#27df2817055bc099821d96eb60a40b34">dnsaddr</a>), <a class="code" href="a00148.html#g165b603ec150e26efec7be199c9c2901">uip_ipaddr4</a>(s.<a class="code" href="a00077.html#27df2817055bc099821d96eb60a40b34">dnsaddr</a>));
<a name="l00300"></a>00300   printf(<span class="stringliteral">"Got default router %d.%d.%d.%d\n"</span>,
<a name="l00301"></a>00301          <a class="code" href="a00148.html#g22fa0681cd463191d7a01fe85d86996f">uip_ipaddr1</a>(s.<a class="code" href="a00077.html#5e16ca335dfd7394527f602da879fca2">default_router</a>), <a class="code" href="a00148.html#gffcd2fbe181e2aaefbf970551c302af5">uip_ipaddr2</a>(s.<a class="code" href="a00077.html#5e16ca335dfd7394527f602da879fca2">default_router</a>),
<a name="l00302"></a>00302          <a class="code" href="a00148.html#ge23534479ead15af8ff08ace26a47fb5">uip_ipaddr3</a>(s.<a class="code" href="a00077.html#5e16ca335dfd7394527f602da879fca2">default_router</a>), <a class="code" href="a00148.html#g165b603ec150e26efec7be199c9c2901">uip_ipaddr4</a>(s.<a class="code" href="a00077.html#5e16ca335dfd7394527f602da879fca2">default_router</a>));
<a name="l00303"></a>00303   printf(<span class="stringliteral">"Lease expires in %ld seconds\n"</span>,
<a name="l00304"></a>00304          <a class="code" href="a00148.html#g118e9d76568ab81ad97f138d4ea1ddd2">ntohs</a>(s.<a class="code" href="a00077.html#7a520a57d7d0541524f34a7685635597">lease_time</a>[0])*65536ul + <a class="code" href="a00148.html#g118e9d76568ab81ad97f138d4ea1ddd2">ntohs</a>(s.<a class="code" href="a00077.html#7a520a57d7d0541524f34a7685635597">lease_time</a>[1]));
<a name="l00305"></a>00305 <span class="preprocessor">#endif</span>
<a name="l00306"></a>00306 <span class="preprocessor"></span>
<a name="l00307"></a>00307   dhcpc_configured(&amp;s);
<a name="l00308"></a>00308   
<a name="l00309"></a>00309   <span class="comment">/*  timer_stop(&amp;s.timer);*/</span>
<a name="l00310"></a>00310 
<a name="l00311"></a>00311   <span class="comment">/*</span>
<a name="l00312"></a>00312 <span class="comment">   * PT_END restarts the thread so we do this instead. Eventually we</span>
<a name="l00313"></a>00313 <span class="comment">   * should reacquire expired leases here.</span>
<a name="l00314"></a>00314 <span class="comment">   */</span>
<a name="l00315"></a>00315   <span class="keywordflow">while</span>(1) {
<a name="l00316"></a>00316     <a class="code" href="a00142.html#g155cba6121323726d02c00284428fed6">PT_YIELD</a>(&amp;s.<a class="code" href="a00077.html#31471b5e27bda51832d0fa49bd6d9b54">pt</a>);
<a name="l00317"></a>00317   }
<a name="l00318"></a>00318 
<a name="l00319"></a>00319   <a class="code" href="a00142.html#g7b04a0035bef29d905496c23bae066d2">PT_END</a>(&amp;s.<a class="code" href="a00077.html#31471b5e27bda51832d0fa49bd6d9b54">pt</a>);
<a name="l00320"></a>00320 }
<a name="l00321"></a>00321 <span class="comment">/*---------------------------------------------------------------------------*/</span>
<a name="l00322"></a>00322 <span class="keywordtype">void</span>
<a name="l00323"></a>00323 dhcpc_init(<span class="keyword">const</span> <span class="keywordtype">void</span> *mac_addr, <span class="keywordtype">int</span> mac_len)
<a name="l00324"></a>00324 {
<a name="l00325"></a>00325   <a class="code" href="a00150.html#g1ef35301f43a5bbb9f89f07b5a36b9a0">uip_ipaddr_t</a> addr;
<a name="l00326"></a>00326   
<a name="l00327"></a>00327   s.<a class="code" href="a00077.html#2391bb18db5f620e0e9fb848ae5ba5e9">mac_addr</a> = mac_addr;
<a name="l00328"></a>00328   s.<a class="code" href="a00077.html#5361ef75bfbdb469b5cc31f0060a2670">mac_len</a>  = mac_len;
<a name="l00329"></a>00329 
<a name="l00330"></a>00330   s.<a class="code" href="a00077.html#e0b137a3875ad12a99e5e3e0e177fd12">state</a> = STATE_INITIAL;
<a name="l00331"></a>00331   <a class="code" href="a00148.html#g87f0b54ade0d159fba495089128a4932">uip_ipaddr</a>(addr, 255,255,255,255);
<a name="l00332"></a>00332   s.<a class="code" href="a00077.html#cfd36e02c7498d766ff802575e981612">conn</a> = <a class="code" href="a00147.html#g79c4110211247df3fb30b8cf1c4c02af">uip_udp_new</a>(&amp;addr, <a class="code" href="a00148.html#g69a7a4951ff21b302267532c21ee78fc">HTONS</a>(DHCPC_SERVER_PORT));
<a name="l00333"></a>00333   <span class="keywordflow">if</span>(s.<a class="code" href="a00077.html#cfd36e02c7498d766ff802575e981612">conn</a> != <a class="code" href="a00160.html#g070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {
<a name="l00334"></a>00334     <a class="code" href="a00147.html#ga20812098a4663c8a9fc4ce8e95391b6">uip_udp_bind</a>(s.<a class="code" href="a00077.html#cfd36e02c7498d766ff802575e981612">conn</a>, <a class="code" href="a00148.html#g69a7a4951ff21b302267532c21ee78fc">HTONS</a>(DHCPC_CLIENT_PORT));
<a name="l00335"></a>00335   }
<a name="l00336"></a>00336   <a class="code" href="a00142.html#ge6bae7dc0225468c8a5ac269df549892">PT_INIT</a>(&amp;s.<a class="code" href="a00077.html#31471b5e27bda51832d0fa49bd6d9b54">pt</a>);
<a name="l00337"></a>00337 }
<a name="l00338"></a>00338 <span class="comment">/*---------------------------------------------------------------------------*/</span>
<a name="l00339"></a>00339 <span class="keywordtype">void</span>
<a name="l00340"></a>00340 dhcpc_appcall(<span class="keywordtype">void</span>)
<a name="l00341"></a>00341 {
<a name="l00342"></a>00342   handle_dhcp();
<a name="l00343"></a>00343 }
<a name="l00344"></a>00344 <span class="comment">/*---------------------------------------------------------------------------*/</span>
<a name="l00345"></a>00345 <span class="keywordtype">void</span>
<a name="l00346"></a>00346 dhcpc_request(<span class="keywordtype">void</span>)
<a name="l00347"></a>00347 {
<a name="l00348"></a>00348   <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> ipaddr[2];
<a name="l00349"></a>00349   
<a name="l00350"></a>00350   <span class="keywordflow">if</span>(s.<a class="code" href="a00077.html#e0b137a3875ad12a99e5e3e0e177fd12">state</a> == STATE_INITIAL) {
<a name="l00351"></a>00351     <a class="code" href="a00148.html#g87f0b54ade0d159fba495089128a4932">uip_ipaddr</a>(ipaddr, 0,0,0,0);
<a name="l00352"></a>00352     <a class="code" href="a00144.html#g12b467f314489259dd718228d0827a51">uip_sethostaddr</a>(ipaddr);
<a name="l00353"></a>00353     <span class="comment">/*    handle_dhcp(PROCESS_EVENT_NONE, NULL);*/</span>
<a name="l00354"></a>00354   }
<a name="l00355"></a>00355 }
<a name="l00356"></a>00356 <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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