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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: uip/uip_arp.c Source File</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 id="current"><a href="files.html"><span>Files</span></a></li> <li><a href="examples.html"><span>Examples</span></a></li> </ul></div><div class="tabs"> <ul> <li><a href="files.html"><span>File List</span></a></li> <li><a href="globals.html"><span>Globals</span></a></li> </ul></div><h1>uip/uip_arp.c</h1><a href="a00138.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 uip</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 uiparp uIP Address Resolution Protocol</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 Address Resolution Protocol ARP is used for mapping between IP</span><a name="l00011"></a>00011 <span class="comment"> * addresses and link level addresses such as the Ethernet MAC</span><a name="l00012"></a>00012 <span class="comment"> * addresses. ARP uses broadcast queries to ask for the link level</span><a name="l00013"></a>00013 <span class="comment"> * address of a known IP address and the host which is configured with</span><a name="l00014"></a>00014 <span class="comment"> * the IP address for which the query was meant, will respond with its</span><a name="l00015"></a>00015 <span class="comment"> * link level address.</span><a name="l00016"></a>00016 <span class="comment"> *</span><a name="l00017"></a>00017 <span class="comment"> * \note This ARP implementation only supports Ethernet.</span><a name="l00018"></a>00018 <span class="comment"> */</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"> * \file</span><a name="l00022"></a>00022 <span class="comment"> * Implementation of the ARP Address Resolution Protocol.</span><a name="l00023"></a>00023 <span class="comment"> * \author Adam Dunkels <adam@dunkels.com></span><a name="l00024"></a>00024 <span class="comment"> *</span><a name="l00025"></a>00025 <span class="comment"> */</span><a name="l00026"></a>00026 <a name="l00027"></a>00027 <span class="comment">/*</span><a name="l00028"></a>00028 <span class="comment"> * Copyright (c) 2001-2003, Adam Dunkels.</span><a name="l00029"></a>00029 <span class="comment"> * All rights reserved.</span><a name="l00030"></a>00030 <span class="comment"> *</span><a name="l00031"></a>00031 <span class="comment"> * Redistribution and use in source and binary forms, with or without</span><a name="l00032"></a>00032 <span class="comment"> * modification, are permitted provided that the following conditions</span><a name="l00033"></a>00033 <span class="comment"> * are met:</span><a name="l00034"></a>00034 <span class="comment"> * 1. Redistributions of source code must retain the above copyright</span><a name="l00035"></a>00035 <span class="comment"> * notice, this list of conditions and the following disclaimer.</span><a name="l00036"></a>00036 <span class="comment"> * 2. Redistributions in binary form must reproduce the above copyright</span><a name="l00037"></a>00037 <span class="comment"> * notice, this list of conditions and the following disclaimer in the</span><a name="l00038"></a>00038 <span class="comment"> * documentation and/or other materials provided with the distribution.</span><a name="l00039"></a>00039 <span class="comment"> * 3. The name of the author may not be used to endorse or promote</span><a name="l00040"></a>00040 <span class="comment"> * products derived from this software without specific prior</span><a name="l00041"></a>00041 <span class="comment"> * written permission.</span><a name="l00042"></a>00042 <span class="comment"> *</span><a name="l00043"></a>00043 <span class="comment"> * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS</span><a name="l00044"></a>00044 <span class="comment"> * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED</span><a name="l00045"></a>00045 <span class="comment"> * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE</span><a name="l00046"></a>00046 <span class="comment"> * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY</span><a name="l00047"></a>00047 <span class="comment"> * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL</span><a name="l00048"></a>00048 <span class="comment"> * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE</span><a name="l00049"></a>00049 <span class="comment"> * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS</span><a name="l00050"></a>00050 <span class="comment"> * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,</span><a name="l00051"></a>00051 <span class="comment"> * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING</span><a name="l00052"></a>00052 <span class="comment"> * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS</span><a name="l00053"></a>00053 <span class="comment"> * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span><a name="l00054"></a>00054 <span class="comment"> *</span><a name="l00055"></a>00055 <span class="comment"> * This file is part of the uIP TCP/IP stack.</span><a name="l00056"></a>00056 <span class="comment"> *</span><a name="l00057"></a>00057 <span class="comment"> * $Id: uip_arp.c,v 1.8 2006/06/02 23:36:21 adam Exp $</span><a name="l00058"></a>00058 <span class="comment"> *</span><a name="l00059"></a>00059 <span class="comment"> */</span><a name="l00060"></a>00060 <a name="l00061"></a>00061 <a name="l00062"></a>00062 <span class="preprocessor">#include "<a class="code" href="a00139.html">uip_arp.h</a>"</span><a name="l00063"></a>00063 <a name="l00064"></a>00064 <span class="preprocessor">#include <string.h></span><a name="l00065"></a>00065 <a name="l00066"></a>00066 <span class="keyword">struct </span>arp_hdr {<a name="l00067"></a>00067 <span class="keyword">struct </span><a class="code" href="a00090.html">uip_eth_hdr</a> ethhdr;<a name="l00068"></a>00068 <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> hwtype;<a name="l00069"></a>00069 <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> protocol;<a name="l00070"></a>00070 <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> hwlen;<a name="l00071"></a>00071 <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> protolen;<a name="l00072"></a>00072 <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> opcode;<a name="l00073"></a>00073 <span class="keyword">struct </span><a class="code" href="a00089.html">uip_eth_addr</a> shwaddr;<a name="l00074"></a>00074 <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> sipaddr[2];<a name="l00075"></a>00075 <span class="keyword">struct </span><a class="code" href="a00089.html">uip_eth_addr</a> dhwaddr;<a name="l00076"></a>00076 <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> dipaddr[2];<a name="l00077"></a>00077 };<a name="l00078"></a>00078 <a name="l00079"></a>00079 <span class="keyword">struct </span>ethip_hdr {<a name="l00080"></a>00080 <span class="keyword">struct </span><a class="code" href="a00090.html">uip_eth_hdr</a> ethhdr;<a name="l00081"></a>00081 <span class="comment">/* IP header. */</span><a name="l00082"></a>00082 <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> vhl,<a name="l00083"></a>00083 tos,<a name="l00084"></a>00084 len[2],<a name="l00085"></a>00085 ipid[2],<a name="l00086"></a>00086 ipoffset[2],<a name="l00087"></a>00087 ttl,<a name="l00088"></a>00088 proto;<a name="l00089"></a>00089 <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> ipchksum;<a name="l00090"></a>00090 <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> srcipaddr[2],<a name="l00091"></a>00091 destipaddr[2];<a name="l00092"></a>00092 };<a name="l00093"></a>00093 ⌨️ 快捷键说明
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