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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"><title>uIP 1.0: dhcpc.c</title><link href="doxygen.css" rel="stylesheet" type="text/css"><link href="tabs.css" rel="stylesheet" type="text/css"></head><body><!-- Generated by Doxygen 1.4.6 --><div class="tabs"> <ul> <li><a href="main.html"><span>Main Page</span></a></li> <li><a href="modules.html"><span>Modules</span></a></li> <li><a href="classes.html"><span>Data Structures</span></a></li> <li><a href="files.html"><span>Files</span></a></li> <li><a href="examples.html"><span>Examples</span></a></li> </ul></div><h1>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 <stdio.h></span><a name="l00035"></a>00035 <span class="preprocessor">#include <string.h></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 name="_a0"></a><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 name="a1"></a><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 name="a2"></a><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 name="a3"></a><a class="code" href="a00077.html#564bab93ef6a268a5de2fab885c1d32a">serverid</a>, 4);⌨️ 快捷键说明
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