1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 2<html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"> 3<title>uIP 1.0: dhcpc.c</title> 4<link href="doxygen.css" rel="stylesheet" type="text/css"> 5<link href="tabs.css" rel="stylesheet" type="text/css"> 6</head><body> 7<!-- Generated by Doxygen 1.4.6 --> 8<div class="tabs"> 9 <ul> 10 <li><a href="main.html"><span>Main Page</span></a></li> 11 <li><a href="modules.html"><span>Modules</span></a></li> 12 <li><a href="classes.html"><span>Data Structures</span></a></li> 13 <li><a href="files.html"><span>Files</span></a></li> 14 <li><a href="examples.html"><span>Examples</span></a></li> 15 </ul></div> 16<h1>dhcpc.c</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span> 17<a name="l00002"></a>00002 <span class="comment"> * Copyright (c) 2005, Swedish Institute of Computer Science</span> 18<a name="l00003"></a>00003 <span class="comment"> * All rights reserved.</span> 19<a name="l00004"></a>00004 <span class="comment"> *</span> 20<a name="l00005"></a>00005 <span class="comment"> * Redistribution and use in source and binary forms, with or without</span> 21<a name="l00006"></a>00006 <span class="comment"> * modification, are permitted provided that the following conditions</span> 22<a name="l00007"></a>00007 <span class="comment"> * are met:</span> 23<a name="l00008"></a>00008 <span class="comment"> * 1. Redistributions of source code must retain the above copyright</span> 24<a name="l00009"></a>00009 <span class="comment"> * notice, this list of conditions and the following disclaimer.</span> 25<a name="l00010"></a>00010 <span class="comment"> * 2. Redistributions in binary form must reproduce the above copyright</span> 26<a name="l00011"></a>00011 <span class="comment"> * notice, this list of conditions and the following disclaimer in the</span> 27<a name="l00012"></a>00012 <span class="comment"> * documentation and/or other materials provided with the distribution.</span> 28<a name="l00013"></a>00013 <span class="comment"> * 3. Neither the name of the Institute nor the names of its contributors</span> 29<a name="l00014"></a>00014 <span class="comment"> * may be used to endorse or promote products derived from this software</span> 30<a name="l00015"></a>00015 <span class="comment"> * without specific prior written permission.</span> 31<a name="l00016"></a>00016 <span class="comment"> *</span> 32<a name="l00017"></a>00017 <span class="comment"> * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND</span> 33<a name="l00018"></a>00018 <span class="comment"> * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE</span> 34<a name="l00019"></a>00019 <span class="comment"> * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE</span> 35<a name="l00020"></a>00020 <span class="comment"> * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE</span> 36<a name="l00021"></a>00021 <span class="comment"> * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL</span> 37<a name="l00022"></a>00022 <span class="comment"> * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS</span> 38<a name="l00023"></a>00023 <span class="comment"> * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)</span> 39<a name="l00024"></a>00024 <span class="comment"> * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT</span> 40<a name="l00025"></a>00025 <span class="comment"> * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY</span> 41<a name="l00026"></a>00026 <span class="comment"> * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF</span> 42<a name="l00027"></a>00027 <span class="comment"> * SUCH DAMAGE.</span> 43<a name="l00028"></a>00028 <span class="comment"> *</span> 44<a name="l00029"></a>00029 <span class="comment"> * This file is part of the uIP TCP/IP stack</span> 45<a name="l00030"></a>00030 <span class="comment"> *</span> 46<a name="l00031"></a>00031 <span class="comment"> * @(#)$Id: dhcpc.c,v 1.2 2006/06/11 21:46:37 adam Exp $</span> 47<a name="l00032"></a>00032 <span class="comment"> */</span> 48<a name="l00033"></a>00033 49<a name="l00034"></a>00034 <span class="preprocessor">#include <stdio.h></span> 50<a name="l00035"></a>00035 <span class="preprocessor">#include <string.h></span> 51<a name="l00036"></a>00036 52<a name="l00037"></a>00037 <span class="preprocessor">#include "<a class="code" href="a00136.html">uip.h</a>"</span> 53<a name="l00038"></a>00038 <span class="preprocessor">#include "dhcpc.h"</span> 54<a name="l00039"></a>00039 <span class="preprocessor">#include "<a class="code" href="a00130.html">timer.h</a>"</span> 55<a name="l00040"></a>00040 <span class="preprocessor">#include "<a class="code" href="a00128.html">pt.h</a>"</span> 56<a name="l00041"></a>00041 57<a name="l00042"></a>00042 <span class="preprocessor">#define STATE_INITIAL 0</span> 58<a name="l00043"></a>00043 <span class="preprocessor"></span><span class="preprocessor">#define STATE_SENDING 1</span> 59<a name="l00044"></a>00044 <span class="preprocessor"></span><span class="preprocessor">#define STATE_OFFER_RECEIVED 2</span> 60<a name="l00045"></a>00045 <span class="preprocessor"></span><span class="preprocessor">#define STATE_CONFIG_RECEIVED 3</span> 61<a name="l00046"></a>00046 <span class="preprocessor"></span> 62<a name="l00047"></a>00047 <span class="keyword">static</span> <span class="keyword">struct </span><a name="_a0"></a><a class="code" href="a00077.html">dhcpc_state</a> s; 63<a name="l00048"></a>00048 64<a name="l00049"></a>00049 <span class="keyword">struct </span>dhcp_msg { 65<a name="l00050"></a>00050 <a name="a1"></a><a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> op, htype, hlen, hops; 66<a name="l00051"></a>00051 <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> xid[4]; 67<a name="l00052"></a>00052 <a name="a2"></a><a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> secs, flags; 68<a name="l00053"></a>00053 <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> ciaddr[4]; 69<a name="l00054"></a>00054 <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> yiaddr[4]; 70<a name="l00055"></a>00055 <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> siaddr[4]; 71<a name="l00056"></a>00056 <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> giaddr[4]; 72<a name="l00057"></a>00057 <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> chaddr[16]; 73<a name="l00058"></a>00058 <span class="preprocessor">#ifndef UIP_CONF_DHCP_LIGHT</span> 74<a name="l00059"></a>00059 <span class="preprocessor"></span> <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> sname[64]; 75<a name="l00060"></a>00060 <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> file[128]; 76<a name="l00061"></a>00061 <span class="preprocessor">#endif</span> 77<a name="l00062"></a>00062 <span class="preprocessor"></span> <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> options[312]; 78<a name="l00063"></a>00063 }; 79<a name="l00064"></a>00064 80<a name="l00065"></a>00065 <span class="preprocessor">#define BOOTP_BROADCAST 0x8000</span> 81<a name="l00066"></a>00066 <span class="preprocessor"></span> 82<a name="l00067"></a>00067 <span class="preprocessor">#define DHCP_REQUEST 1</span> 83<a name="l00068"></a>00068 <span class="preprocessor"></span><span class="preprocessor">#define DHCP_REPLY 2</span> 84<a name="l00069"></a>00069 <span class="preprocessor"></span><span class="preprocessor">#define DHCP_HTYPE_ETHERNET 1</span> 85<a name="l00070"></a>00070 <span class="preprocessor"></span><span class="preprocessor">#define DHCP_HLEN_ETHERNET 6</span> 86<a name="l00071"></a>00071 <span class="preprocessor"></span><span class="preprocessor">#define DHCP_MSG_LEN 236</span> 87<a name="l00072"></a>00072 <span class="preprocessor"></span> 88<a name="l00073"></a>00073 <span class="preprocessor">#define DHCPC_SERVER_PORT 67</span> 89<a name="l00074"></a>00074 <span class="preprocessor"></span><span class="preprocessor">#define DHCPC_CLIENT_PORT 68</span> 90<a name="l00075"></a>00075 <span class="preprocessor"></span> 91<a name="l00076"></a>00076 <span class="preprocessor">#define DHCPDISCOVER 1</span> 92<a name="l00077"></a>00077 <span class="preprocessor"></span><span class="preprocessor">#define DHCPOFFER 2</span> 93<a name="l00078"></a>00078 <span class="preprocessor"></span><span class="preprocessor">#define DHCPREQUEST 3</span> 94<a name="l00079"></a>00079 <span class="preprocessor"></span><span class="preprocessor">#define DHCPDECLINE 4</span> 95<a name="l00080"></a>00080 <span class="preprocessor"></span><span class="preprocessor">#define DHCPACK 5</span> 96<a name="l00081"></a>00081 <span class="preprocessor"></span><span class="preprocessor">#define DHCPNAK 6</span> 97<a name="l00082"></a>00082 <span class="preprocessor"></span><span class="preprocessor">#define DHCPRELEASE 7</span> 98<a name="l00083"></a>00083 <span class="preprocessor"></span> 99<a name="l00084"></a>00084 <span class="preprocessor">#define DHCP_OPTION_SUBNET_MASK 1</span> 100<a name="l00085"></a>00085 <span class="preprocessor"></span><span class="preprocessor">#define DHCP_OPTION_ROUTER 3</span> 101<a name="l00086"></a>00086 <span class="preprocessor"></span><span class="preprocessor">#define DHCP_OPTION_DNS_SERVER 6</span> 102<a name="l00087"></a>00087 <span class="preprocessor"></span><span class="preprocessor">#define DHCP_OPTION_REQ_IPADDR 50</span> 103<a name="l00088"></a>00088 <span class="preprocessor"></span><span class="preprocessor">#define DHCP_OPTION_LEASE_TIME 51</span> 104<a name="l00089"></a>00089 <span class="preprocessor"></span><span class="preprocessor">#define DHCP_OPTION_MSG_TYPE 53</span> 105<a name="l00090"></a>00090 <span class="preprocessor"></span><span class="preprocessor">#define DHCP_OPTION_SERVER_ID 54</span> 106<a name="l00091"></a>00091 <span class="preprocessor"></span><span class="preprocessor">#define DHCP_OPTION_REQ_LIST 55</span> 107<a name="l00092"></a>00092 <span class="preprocessor"></span><span class="preprocessor">#define DHCP_OPTION_END 255</span> 108<a name="l00093"></a>00093 <span class="preprocessor"></span> 109<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}; 110<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}; 111<a name="l00096"></a>00096 <span class="comment">/*---------------------------------------------------------------------------*/</span> 112<a name="l00097"></a>00097 <span class="keyword">static</span> <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> * 113<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) 114<a name="l00099"></a>00099 { 115<a name="l00100"></a>00100 *optptr++ = DHCP_OPTION_MSG_TYPE; 116<a name="l00101"></a>00101 *optptr++ = 1; 117<a name="l00102"></a>00102 *optptr++ = type; 118<a name="l00103"></a>00103 <span class="keywordflow">return</span> optptr; 119<a name="l00104"></a>00104 } 120<a name="l00105"></a>00105 <span class="comment">/*---------------------------------------------------------------------------*/</span> 121<a name="l00106"></a>00106 <span class="keyword">static</span> <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> * 122<a name="l00107"></a>00107 add_server_id(<a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *optptr) 123<a name="l00108"></a>00108 { 124<a name="l00109"></a>00109 *optptr++ = DHCP_OPTION_SERVER_ID; 125<a name="l00110"></a>00110 *optptr++ = 4; 126<a name="l00111"></a>00111 memcpy(optptr, s.<a name="a3"></a><a class="code" href="a00077.html#564bab93ef6a268a5de2fab885c1d32a">serverid</a>, 4); 127<a name="l00112"></a>00112 <span class="keywordflow">return</span> optptr + 4; 128<a name="l00113"></a>00113 } 129<a name="l00114"></a>00114 <span class="comment">/*---------------------------------------------------------------------------*/</span> 130<a name="l00115"></a>00115 <span class="keyword">static</span> <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> * 131<a name="l00116"></a>00116 add_req_ipaddr(<a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *optptr) 132<a name="l00117"></a>00117 { 133<a name="l00118"></a>00118 *optptr++ = DHCP_OPTION_REQ_IPADDR; 134<a name="l00119"></a>00119 *optptr++ = 4; 135<a name="l00120"></a>00120 memcpy(optptr, s.<a name="a4"></a><a class="code" href="a00077.html#1d2f2751b0865045486c9aa59d0d0971">ipaddr</a>, 4); 136<a name="l00121"></a>00121 <span class="keywordflow">return</span> optptr + 4; 137<a name="l00122"></a>00122 } 138<a name="l00123"></a>00123 <span class="comment">/*---------------------------------------------------------------------------*/</span> 139<a name="l00124"></a>00124 <span class="keyword">static</span> <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> * 140<a name="l00125"></a>00125 add_req_options(<a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *optptr) 141<a name="l00126"></a>00126 { 142<a name="l00127"></a>00127 *optptr++ = DHCP_OPTION_REQ_LIST; 143<a name="l00128"></a>00128 *optptr++ = 3; 144<a name="l00129"></a>00129 *optptr++ = DHCP_OPTION_SUBNET_MASK; 145<a name="l00130"></a>00130 *optptr++ = DHCP_OPTION_ROUTER; 146<a name="l00131"></a>00131 *optptr++ = DHCP_OPTION_DNS_SERVER; 147<a name="l00132"></a>00132 <span class="keywordflow">return</span> optptr; 148<a name="l00133"></a>00133 } 149<a name="l00134"></a>00134 <span class="comment">/*---------------------------------------------------------------------------*/</span> 150<a name="l00135"></a>00135 <span class="keyword">static</span> <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> * 151<a name="l00136"></a>00136 add_end(<a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *optptr) 152<a name="l00137"></a>00137 { 153<a name="l00138"></a>00138 *optptr++ = DHCP_OPTION_END; 154<a name="l00139"></a>00139 <span class="keywordflow">return</span> optptr; 155<a name="l00140"></a>00140 } 156<a name="l00141"></a>00141 <span class="comment">/*---------------------------------------------------------------------------*/</span> 157<a name="l00142"></a>00142 <span class="keyword">static</span> <span class="keywordtype">void</span> 158<a name="l00143"></a>00143 create_msg(<span class="keyword">register</span> <span class="keyword">struct</span> dhcp_msg *m) 159<a name="l00144"></a>00144 { 160<a name="l00145"></a>00145 m->op = DHCP_REQUEST; 161<a name="l00146"></a>00146 m->htype = DHCP_HTYPE_ETHERNET; 162<a name="l00147"></a>00147 m->hlen = s.<a name="a5"></a><a class="code" href="a00077.html#5361ef75bfbdb469b5cc31f0060a2670">mac_len</a>; 163<a name="l00148"></a>00148 m->hops = 0; 164<a name="l00149"></a>00149 memcpy(m->xid, xid, <span class="keyword">sizeof</span>(m->xid)); 165<a name="l00150"></a>00150 m->secs = 0; 166<a name="l00151"></a>00151 m->flags = <a name="a6"></a><a class="code" href="a00148.html#g69a7a4951ff21b302267532c21ee78fc">HTONS</a>(BOOTP_BROADCAST); <span class="comment">/* Broadcast bit. */</span> 167<a name="l00152"></a>00152 <span class="comment">/* uip_ipaddr_copy(m->ciaddr, uip_hostaddr);*/</span> 168<a name="l00153"></a>00153 memcpy(m->ciaddr, <a name="a7"></a><a class="code" href="a00150.html#g7d3673f52f5846b6961d23b150decd54">uip_hostaddr</a>, <span class="keyword">sizeof</span>(m->ciaddr)); 169<a name="l00154"></a>00154 memset(m->yiaddr, 0, <span class="keyword">sizeof</span>(m->yiaddr)); 170<a name="l00155"></a>00155 memset(m->siaddr, 0, <span class="keyword">sizeof</span>(m->siaddr)); 171<a name="l00156"></a>00156 memset(m->giaddr, 0, <span class="keyword">sizeof</span>(m->giaddr)); 172<a name="l00157"></a>00157 memcpy(m->chaddr, s.<a name="a8"></a><a class="code" href="a00077.html#2391bb18db5f620e0e9fb848ae5ba5e9">mac_addr</a>, s.<a class="code" href="a00077.html#5361ef75bfbdb469b5cc31f0060a2670">mac_len</a>); 173<a name="l00158"></a>00158 memset(&m->chaddr[s.<a class="code" href="a00077.html#5361ef75bfbdb469b5cc31f0060a2670">mac_len</a>], 0, <span class="keyword">sizeof</span>(m->chaddr) - s.<a class="code" href="a00077.html#5361ef75bfbdb469b5cc31f0060a2670">mac_len</a>); 174<a name="l00159"></a>00159 <span class="preprocessor">#ifndef UIP_CONF_DHCP_LIGHT</span> 175<a name="l00160"></a>00160 <span class="preprocessor"></span> memset(m->sname, 0, <span class="keyword">sizeof</span>(m->sname)); 176<a name="l00161"></a>00161 memset(m->file, 0, <span class="keyword">sizeof</span>(m->file)); 177<a name="l00162"></a>00162 <span class="preprocessor">#endif</span> 178<a name="l00163"></a>00163 <span class="preprocessor"></span> 179<a name="l00164"></a>00164 memcpy(m->options, magic_cookie, <span class="keyword">sizeof</span>(magic_cookie)); 180<a name="l00165"></a>00165 } 181<a name="l00166"></a>00166 <span class="comment">/*---------------------------------------------------------------------------*/</span> 182<a name="l00167"></a>00167 <span class="keyword">static</span> <span class="keywordtype">void</span> 183<a name="l00168"></a>00168 send_discover(<span class="keywordtype">void</span>) 184<a name="l00169"></a>00169 { 185<a name="l00170"></a>00170 <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *end; 186<a name="l00171"></a>00171 <span class="keyword">struct </span>dhcp_msg *m = (<span class="keyword">struct </span>dhcp_msg *)<a name="a9"></a><a class="code" href="a00150.html#g561b8eda32e059d4e7397f776268cc63">uip_appdata</a>; 187<a name="l00172"></a>00172 188<a name="l00173"></a>00173 create_msg(m); 189<a name="l00174"></a>00174 190<a name="l00175"></a>00175 end = add_msg_type(&m->options[4], DHCPDISCOVER); 191<a name="l00176"></a>00176 end = add_req_options(end); 192<a name="l00177"></a>00177 end = add_end(end); 193<a name="l00178"></a>00178 194<a name="l00179"></a>00179 <a name="a10"></a><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>); 195<a name="l00180"></a>00180 } 196<a name="l00181"></a>00181 <span class="comment">/*---------------------------------------------------------------------------*/</span> 197<a name="l00182"></a>00182 <span class="keyword">static</span> <span class="keywordtype">void</span> 198<a name="l00183"></a>00183 send_request(<span class="keywordtype">void</span>) 199<a name="l00184"></a>00184 { 200<a name="l00185"></a>00185 <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *end; 201<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>; 202<a name="l00187"></a>00187 203<a name="l00188"></a>00188 create_msg(m); 204<a name="l00189"></a>00189 205<a name="l00190"></a>00190 end = add_msg_type(&m->options[4], DHCPREQUEST); 206<a name="l00191"></a>00191 end = add_server_id(end); 207<a name="l00192"></a>00192 end = add_req_ipaddr(end); 208<a name="l00193"></a>00193 end = add_end(end); 209<a name="l00194"></a>00194 210<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>); 211<a name="l00196"></a>00196 } 212<a name="l00197"></a>00197 <span class="comment">/*---------------------------------------------------------------------------*/</span> 213<a name="l00198"></a>00198 <span class="keyword">static</span> <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> 214<a name="l00199"></a>00199 parse_options(<a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *optptr, <span class="keywordtype">int</span> len) 215<a name="l00200"></a>00200 { 216<a name="l00201"></a>00201 <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *end = optptr + len; 217<a name="l00202"></a>00202 <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> type = 0; 218<a name="l00203"></a>00203 219<a name="l00204"></a>00204 <span class="keywordflow">while</span>(optptr < end) { 220<a name="l00205"></a>00205 <span class="keywordflow">switch</span>(*optptr) { 221<a name="l00206"></a>00206 <span class="keywordflow">case</span> DHCP_OPTION_SUBNET_MASK: 222<a name="l00207"></a>00207 memcpy(s.<a name="a11"></a><a class="code" href="a00077.html#20541305548441e5dcb2e1e7e6f300eb">netmask</a>, optptr + 2, 4); 223<a name="l00208"></a>00208 <span class="keywordflow">break</span>; 224<a name="l00209"></a>00209 <span class="keywordflow">case</span> DHCP_OPTION_ROUTER: 225<a name="l00210"></a>00210 memcpy(s.<a name="a12"></a><a class="code" href="a00077.html#5e16ca335dfd7394527f602da879fca2">default_router</a>, optptr + 2, 4); 226<a name="l00211"></a>00211 <span class="keywordflow">break</span>; 227<a name="l00212"></a>00212 <span class="keywordflow">case</span> DHCP_OPTION_DNS_SERVER: 228<a name="l00213"></a>00213 memcpy(s.<a name="a13"></a><a class="code" href="a00077.html#27df2817055bc099821d96eb60a40b34">dnsaddr</a>, optptr + 2, 4); 229<a name="l00214"></a>00214 <span class="keywordflow">break</span>; 230<a name="l00215"></a>00215 <span class="keywordflow">case</span> DHCP_OPTION_MSG_TYPE: 231<a name="l00216"></a>00216 type = *(optptr + 2); 232<a name="l00217"></a>00217 <span class="keywordflow">break</span>; 233<a name="l00218"></a>00218 <span class="keywordflow">case</span> DHCP_OPTION_SERVER_ID: 234<a name="l00219"></a>00219 memcpy(s.<a class="code" href="a00077.html#564bab93ef6a268a5de2fab885c1d32a">serverid</a>, optptr + 2, 4); 235<a name="l00220"></a>00220 <span class="keywordflow">break</span>; 236<a name="l00221"></a>00221 <span class="keywordflow">case</span> DHCP_OPTION_LEASE_TIME: 237<a name="l00222"></a>00222 memcpy(s.<a name="a14"></a><a class="code" href="a00077.html#7a520a57d7d0541524f34a7685635597">lease_time</a>, optptr + 2, 4); 238<a name="l00223"></a>00223 <span class="keywordflow">break</span>; 239<a name="l00224"></a>00224 <span class="keywordflow">case</span> DHCP_OPTION_END: 240<a name="l00225"></a>00225 <span class="keywordflow">return</span> type; 241<a name="l00226"></a>00226 } 242<a name="l00227"></a>00227 243<a name="l00228"></a>00228 optptr += optptr[1] + 2; 244<a name="l00229"></a>00229 } 245<a name="l00230"></a>00230 <span class="keywordflow">return</span> type; 246<a name="l00231"></a>00231 } 247<a name="l00232"></a>00232 <span class="comment">/*---------------------------------------------------------------------------*/</span> 248<a name="l00233"></a>00233 <span class="keyword">static</span> <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> 249<a name="l00234"></a>00234 parse_msg(<span class="keywordtype">void</span>) 250<a name="l00235"></a>00235 { 251<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>; 252<a name="l00237"></a>00237 253<a name="l00238"></a>00238 <span class="keywordflow">if</span>(m->op == DHCP_REPLY && 254<a name="l00239"></a>00239 memcmp(m->xid, xid, <span class="keyword">sizeof</span>(xid)) == 0 && 255<a name="l00240"></a>00240 memcmp(m->chaddr, s.<a class="code" href="a00077.html#2391bb18db5f620e0e9fb848ae5ba5e9">mac_addr</a>, s.<a class="code" href="a00077.html#5361ef75bfbdb469b5cc31f0060a2670">mac_len</a>) == 0) { 256<a name="l00241"></a>00241 memcpy(s.<a class="code" href="a00077.html#1d2f2751b0865045486c9aa59d0d0971">ipaddr</a>, m->yiaddr, 4); 257<a name="l00242"></a>00242 <span class="keywordflow">return</span> parse_options(&m->options[4], <a name="a15"></a><a class="code" href="a00147.html#g1a1bc437c09ddef238abab41d77c3177">uip_datalen</a>()); 258<a name="l00243"></a>00243 } 259<a name="l00244"></a>00244 <span class="keywordflow">return</span> 0; 260<a name="l00245"></a>00245 } 261<a name="l00246"></a>00246 <span class="comment">/*---------------------------------------------------------------------------*/</span> 262<a name="l00247"></a>00247 <span class="keyword">static</span> 263<a name="l00248"></a>00248 <a name="a16"></a><a class="code" href="a00142.html#g3d4c8bd4aada659eb34f5d2ffd3e7901">PT_THREAD</a>(handle_dhcp(<span class="keywordtype">void</span>)) 264<a name="l00249"></a>00249 { 265<a name="l00250"></a>00250 <a name="a17"></a><a class="code" href="a00142.html#g2ffbb9e554e08a343ae2f9de4bedfdfc">PT_BEGIN</a>(&s.<a name="a18"></a><a class="code" href="a00077.html#31471b5e27bda51832d0fa49bd6d9b54">pt</a>); 266<a name="l00251"></a>00251 267<a name="l00252"></a>00252 <span class="comment">/* try_again:*/</span> 268<a name="l00253"></a>00253 s.<a name="a19"></a><a class="code" href="a00077.html#e0b137a3875ad12a99e5e3e0e177fd12">state</a> = STATE_SENDING; 269<a name="l00254"></a>00254 s.<a name="a20"></a><a class="code" href="a00077.html#e707c39412e09d3a47f0b3c5dad33725">ticks</a> = <a name="a21"></a><a class="code" href="a00157.html#ge3ced0551b26c9b99cb45a86f34d100a">CLOCK_SECOND</a>; 270<a name="l00255"></a>00255 271<a name="l00256"></a>00256 <span class="keywordflow">do</span> { 272<a name="l00257"></a>00257 send_discover(); 273<a name="l00258"></a>00258 <a name="a22"></a><a class="code" href="a00156.html#g6614d96fdfcd95c95ec6e6f63071ff51">timer_set</a>(&s.<a name="a23"></a><a class="code" href="a00077.html#e80af46ceef63eab3c786525370ae720">timer</a>, s.<a class="code" href="a00077.html#e707c39412e09d3a47f0b3c5dad33725">ticks</a>); 274<a name="l00259"></a>00259 <a name="a24"></a><a class="code" href="a00142.html#g99e43010ec61327164466aa2d902de45">PT_WAIT_UNTIL</a>(&s.<a class="code" href="a00077.html#31471b5e27bda51832d0fa49bd6d9b54">pt</a>, <a name="a25"></a><a class="code" href="a00147.html#g26a14b8dae3f861830af9e7cf1e03725">uip_newdata</a>() || <a name="a26"></a><a class="code" href="a00156.html#g6d71dececfce707c668e6257aad5906e">timer_expired</a>(&s.<a class="code" href="a00077.html#e80af46ceef63eab3c786525370ae720">timer</a>)); 275<a name="l00260"></a>00260 276<a name="l00261"></a>00261 <span class="keywordflow">if</span>(<a class="code" href="a00147.html#g26a14b8dae3f861830af9e7cf1e03725">uip_newdata</a>() && parse_msg() == DHCPOFFER) { 277<a name="l00262"></a>00262 s.<a class="code" href="a00077.html#e0b137a3875ad12a99e5e3e0e177fd12">state</a> = STATE_OFFER_RECEIVED; 278<a name="l00263"></a>00263 <span class="keywordflow">break</span>; 279<a name="l00264"></a>00264 } 280<a name="l00265"></a>00265 281<a name="l00266"></a>00266 <span class="keywordflow">if</span>(s.<a class="code" href="a00077.html#e707c39412e09d3a47f0b3c5dad33725">ticks</a> < <a class="code" href="a00157.html#ge3ced0551b26c9b99cb45a86f34d100a">CLOCK_SECOND</a> * 60) { 282<a name="l00267"></a>00267 s.<a class="code" href="a00077.html#e707c39412e09d3a47f0b3c5dad33725">ticks</a> *= 2; 283<a name="l00268"></a>00268 } 284<a name="l00269"></a>00269 } <span class="keywordflow">while</span>(s.<a class="code" href="a00077.html#e0b137a3875ad12a99e5e3e0e177fd12">state</a> != STATE_OFFER_RECEIVED); 285<a name="l00270"></a>00270 286<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>; 287<a name="l00272"></a>00272 288<a name="l00273"></a>00273 <span class="keywordflow">do</span> { 289<a name="l00274"></a>00274 send_request(); 290<a name="l00275"></a>00275 <a class="code" href="a00156.html#g6614d96fdfcd95c95ec6e6f63071ff51">timer_set</a>(&s.<a class="code" href="a00077.html#e80af46ceef63eab3c786525370ae720">timer</a>, s.<a class="code" href="a00077.html#e707c39412e09d3a47f0b3c5dad33725">ticks</a>); 291<a name="l00276"></a>00276 <a class="code" href="a00142.html#g99e43010ec61327164466aa2d902de45">PT_WAIT_UNTIL</a>(&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>(&s.<a class="code" href="a00077.html#e80af46ceef63eab3c786525370ae720">timer</a>)); 292<a name="l00277"></a>00277 293<a name="l00278"></a>00278 <span class="keywordflow">if</span>(<a class="code" href="a00147.html#g26a14b8dae3f861830af9e7cf1e03725">uip_newdata</a>() && parse_msg() == DHCPACK) { 294<a name="l00279"></a>00279 s.<a class="code" href="a00077.html#e0b137a3875ad12a99e5e3e0e177fd12">state</a> = STATE_CONFIG_RECEIVED; 295<a name="l00280"></a>00280 <span class="keywordflow">break</span>; 296<a name="l00281"></a>00281 } 297<a name="l00282"></a>00282 298<a name="l00283"></a>00283 <span class="keywordflow">if</span>(s.<a class="code" href="a00077.html#e707c39412e09d3a47f0b3c5dad33725">ticks</a> <= <a class="code" href="a00157.html#ge3ced0551b26c9b99cb45a86f34d100a">CLOCK_SECOND</a> * 10) { 299<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>; 300<a name="l00285"></a>00285 } <span class="keywordflow">else</span> { 301<a name="l00286"></a>00286 <a name="a27"></a><a class="code" href="a00142.html#gcd3ac045f0a4ae63412e3b3d8780e8ab">PT_RESTART</a>(&s.<a class="code" href="a00077.html#31471b5e27bda51832d0fa49bd6d9b54">pt</a>); 302<a name="l00287"></a>00287 } 303<a name="l00288"></a>00288 } <span class="keywordflow">while</span>(s.<a class="code" href="a00077.html#e0b137a3875ad12a99e5e3e0e177fd12">state</a> != STATE_CONFIG_RECEIVED); 304<a name="l00289"></a>00289 305<a name="l00290"></a>00290 <span class="preprocessor">#if 0</span> 306<a name="l00291"></a>00291 <span class="preprocessor"></span> printf(<span class="stringliteral">"Got IP address %d.%d.%d.%d\n"</span>, 307<a name="l00292"></a>00292 <a name="a28"></a><a class="code" href="a00148.html#g22fa0681cd463191d7a01fe85d86996f">uip_ipaddr1</a>(s.<a class="code" href="a00077.html#1d2f2751b0865045486c9aa59d0d0971">ipaddr</a>), <a name="a29"></a><a class="code" href="a00148.html#gffcd2fbe181e2aaefbf970551c302af5">uip_ipaddr2</a>(s.<a class="code" href="a00077.html#1d2f2751b0865045486c9aa59d0d0971">ipaddr</a>), 308<a name="l00293"></a>00293 <a name="a30"></a><a class="code" href="a00148.html#ge23534479ead15af8ff08ace26a47fb5">uip_ipaddr3</a>(s.<a class="code" href="a00077.html#1d2f2751b0865045486c9aa59d0d0971">ipaddr</a>), <a name="a31"></a><a class="code" href="a00148.html#g165b603ec150e26efec7be199c9c2901">uip_ipaddr4</a>(s.<a class="code" href="a00077.html#1d2f2751b0865045486c9aa59d0d0971">ipaddr</a>)); 309<a name="l00294"></a>00294 printf(<span class="stringliteral">"Got netmask %d.%d.%d.%d\n"</span>, 310<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>), 311<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>)); 312<a name="l00297"></a>00297 printf(<span class="stringliteral">"Got DNS server %d.%d.%d.%d\n"</span>, 313<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>), 314<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>)); 315<a name="l00300"></a>00300 printf(<span class="stringliteral">"Got default router %d.%d.%d.%d\n"</span>, 316<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>), 317<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>)); 318<a name="l00303"></a>00303 printf(<span class="stringliteral">"Lease expires in %ld seconds\n"</span>, 319<a name="l00304"></a>00304 <a name="a32"></a><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])); 320<a name="l00305"></a>00305 <span class="preprocessor">#endif</span> 321<a name="l00306"></a>00306 <span class="preprocessor"></span> 322<a name="l00307"></a>00307 dhcpc_configured(&s); 323<a name="l00308"></a>00308 324<a name="l00309"></a>00309 <span class="comment">/* timer_stop(&s.timer);*/</span> 325<a name="l00310"></a>00310 326<a name="l00311"></a>00311 <span class="comment">/*</span> 327<a name="l00312"></a>00312 <span class="comment"> * PT_END restarts the thread so we do this instead. Eventually we</span> 328<a name="l00313"></a>00313 <span class="comment"> * should reacquire expired leases here.</span> 329<a name="l00314"></a>00314 <span class="comment"> */</span> 330<a name="l00315"></a>00315 <span class="keywordflow">while</span>(1) { 331<a name="l00316"></a>00316 <a name="a33"></a><a class="code" href="a00142.html#g155cba6121323726d02c00284428fed6">PT_YIELD</a>(&s.<a class="code" href="a00077.html#31471b5e27bda51832d0fa49bd6d9b54">pt</a>); 332<a name="l00317"></a>00317 } 333<a name="l00318"></a>00318 334<a name="l00319"></a>00319 <a name="a34"></a><a class="code" href="a00142.html#g7b04a0035bef29d905496c23bae066d2">PT_END</a>(&s.<a class="code" href="a00077.html#31471b5e27bda51832d0fa49bd6d9b54">pt</a>); 335<a name="l00320"></a>00320 } 336<a name="l00321"></a>00321 <span class="comment">/*---------------------------------------------------------------------------*/</span> 337<a name="l00322"></a>00322 <span class="keywordtype">void</span> 338<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) 339<a name="l00324"></a>00324 { 340<a name="l00325"></a>00325 <a name="a35"></a><a class="code" href="a00150.html#g1ef35301f43a5bbb9f89f07b5a36b9a0">uip_ipaddr_t</a> addr; 341<a name="l00326"></a>00326 342<a name="l00327"></a>00327 s.<a class="code" href="a00077.html#2391bb18db5f620e0e9fb848ae5ba5e9">mac_addr</a> = mac_addr; 343<a name="l00328"></a>00328 s.<a class="code" href="a00077.html#5361ef75bfbdb469b5cc31f0060a2670">mac_len</a> = mac_len; 344<a name="l00329"></a>00329 345<a name="l00330"></a>00330 s.<a class="code" href="a00077.html#e0b137a3875ad12a99e5e3e0e177fd12">state</a> = STATE_INITIAL; 346<a name="l00331"></a>00331 <a name="a36"></a><a class="code" href="a00148.html#g87f0b54ade0d159fba495089128a4932">uip_ipaddr</a>(addr, 255,255,255,255); 347<a name="l00332"></a>00332 s.<a name="a37"></a><a class="code" href="a00077.html#cfd36e02c7498d766ff802575e981612">conn</a> = <a name="a38"></a><a class="code" href="a00147.html#g79c4110211247df3fb30b8cf1c4c02af">uip_udp_new</a>(&addr, <a class="code" href="a00148.html#g69a7a4951ff21b302267532c21ee78fc">HTONS</a>(DHCPC_SERVER_PORT)); 348<a name="l00333"></a>00333 <span class="keywordflow">if</span>(s.<a class="code" href="a00077.html#cfd36e02c7498d766ff802575e981612">conn</a> != <a name="a39"></a><a class="code" href="a00160.html#g070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) { 349<a name="l00334"></a>00334 <a name="a40"></a><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)); 350<a name="l00335"></a>00335 } 351<a name="l00336"></a>00336 <a name="a41"></a><a class="code" href="a00142.html#ge6bae7dc0225468c8a5ac269df549892">PT_INIT</a>(&s.<a class="code" href="a00077.html#31471b5e27bda51832d0fa49bd6d9b54">pt</a>); 352<a name="l00337"></a>00337 } 353<a name="l00338"></a>00338 <span class="comment">/*---------------------------------------------------------------------------*/</span> 354<a name="l00339"></a>00339 <span class="keywordtype">void</span> 355<a name="l00340"></a>00340 dhcpc_appcall(<span class="keywordtype">void</span>) 356<a name="l00341"></a>00341 { 357<a name="l00342"></a>00342 handle_dhcp(); 358<a name="l00343"></a>00343 } 359<a name="l00344"></a>00344 <span class="comment">/*---------------------------------------------------------------------------*/</span> 360<a name="l00345"></a>00345 <span class="keywordtype">void</span> 361<a name="l00346"></a>00346 dhcpc_request(<span class="keywordtype">void</span>) 362<a name="l00347"></a>00347 { 363<a name="l00348"></a>00348 <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> ipaddr[2]; 364<a name="l00349"></a>00349 365<a name="l00350"></a>00350 <span class="keywordflow">if</span>(s.<a class="code" href="a00077.html#e0b137a3875ad12a99e5e3e0e177fd12">state</a> == STATE_INITIAL) { 366<a name="l00351"></a>00351 <a class="code" href="a00148.html#g87f0b54ade0d159fba495089128a4932">uip_ipaddr</a>(ipaddr, 0,0,0,0); 367<a name="l00352"></a>00352 <a name="a42"></a><a class="code" href="a00144.html#g12b467f314489259dd718228d0827a51">uip_sethostaddr</a>(ipaddr); 368<a name="l00353"></a>00353 <span class="comment">/* handle_dhcp(PROCESS_EVENT_NONE, NULL);*/</span> 369<a name="l00354"></a>00354 } 370<a name="l00355"></a>00355 } 371<a name="l00356"></a>00356 <span class="comment">/*---------------------------------------------------------------------------*/</span> 372</pre></div> <hr size="1"><address style="align: right;"><small>Generated on Mon Jun 12 10:23:01 2006 for uIP 1.0 by 373<a href="http://www.doxygen.org/index.html"> 374<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.4.6 </small></address> 375</body> 376</html> 377
