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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.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.c</h1><a href="a00135.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a><a class="code" href="a00135.html#534d9e416324fb8ecca6b9cb4b1f6a6a">00001</a> <span class="preprocessor">#define DEBUG_PRINTF(...) </span><span class="comment">/*printf(__VA_ARGS__)*/</span><a name="l00002"></a>00002 <span class="comment"></span><a name="l00003"></a>00003 <span class="comment">/**</span><a name="l00004"></a>00004 <span class="comment"> * \defgroup uip The uIP TCP/IP stack</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"> * uIP is an implementation of the TCP/IP protocol stack intended for</span><a name="l00008"></a>00008 <span class="comment"> * small 8-bit and 16-bit microcontrollers.</span><a name="l00009"></a>00009 <span class="comment"> *</span><a name="l00010"></a>00010 <span class="comment"> * uIP provides the necessary protocols for Internet communication,</span><a name="l00011"></a>00011 <span class="comment"> * with a very small code footprint and RAM requirements - the uIP</span><a name="l00012"></a>00012 <span class="comment"> * code size is on the order of a few kilobytes and RAM usage is on</span><a name="l00013"></a>00013 <span class="comment"> * the order of a few hundred bytes.</span><a name="l00014"></a>00014 <span class="comment"> */</span><a name="l00015"></a>00015 <span class="comment"></span><a name="l00016"></a>00016 <span class="comment">/**</span><a name="l00017"></a>00017 <span class="comment"> * \file</span><a name="l00018"></a>00018 <span class="comment"> * The uIP TCP/IP stack code.</span><a name="l00019"></a>00019 <span class="comment"> * \author Adam Dunkels <adam@dunkels.com></span><a name="l00020"></a>00020 <span class="comment"> */</span><a name="l00021"></a>00021 <a name="l00022"></a>00022 <span class="comment">/*</span><a name="l00023"></a>00023 <span class="comment"> * Copyright (c) 2001-2003, Adam Dunkels.</span><a name="l00024"></a>00024 <span class="comment"> * All rights reserved.</span><a name="l00025"></a>00025 <span class="comment"> *</span><a name="l00026"></a>00026 <span class="comment"> * Redistribution and use in source and binary forms, with or without</span><a name="l00027"></a>00027 <span class="comment"> * modification, are permitted provided that the following conditions</span><a name="l00028"></a>00028 <span class="comment"> * are met:</span><a name="l00029"></a>00029 <span class="comment"> * 1. Redistributions of source code must retain the above copyright</span><a name="l00030"></a>00030 <span class="comment"> * notice, this list of conditions and the following disclaimer.</span><a name="l00031"></a>00031 <span class="comment"> * 2. Redistributions in binary form must reproduce the above copyright</span><a name="l00032"></a>00032 <span class="comment"> * notice, this list of conditions and the following disclaimer in the</span><a name="l00033"></a>00033 <span class="comment"> * documentation and/or other materials provided with the distribution.</span><a name="l00034"></a>00034 <span class="comment"> * 3. The name of the author may not be used to endorse or promote</span><a name="l00035"></a>00035 <span class="comment"> * products derived from this software without specific prior</span><a name="l00036"></a>00036 <span class="comment"> * written permission.</span><a name="l00037"></a>00037 <span class="comment"> *</span><a name="l00038"></a>00038 <span class="comment"> * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS</span><a name="l00039"></a>00039 <span class="comment"> * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED</span><a name="l00040"></a>00040 <span class="comment"> * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE</span><a name="l00041"></a>00041 <span class="comment"> * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY</span><a name="l00042"></a>00042 <span class="comment"> * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL</span><a name="l00043"></a>00043 <span class="comment"> * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE</span><a name="l00044"></a>00044 <span class="comment"> * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS</span><a name="l00045"></a>00045 <span class="comment"> * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,</span><a name="l00046"></a>00046 <span class="comment"> * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING</span><a name="l00047"></a>00047 <span class="comment"> * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS</span><a name="l00048"></a>00048 <span class="comment"> * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span><a name="l00049"></a>00049 <span class="comment"> *</span><a name="l00050"></a>00050 <span class="comment"> * This file is part of the uIP TCP/IP stack.</span><a name="l00051"></a>00051 <span class="comment"> *</span><a name="l00052"></a>00052 <span class="comment"> * $Id: uip.c,v 1.65 2006/06/11 21:46:39 adam Exp $</span><a name="l00053"></a>00053 <span class="comment"> *</span><a name="l00054"></a>00054 <span class="comment"> */</span><a name="l00055"></a>00055 <a name="l00056"></a>00056 <span class="comment">/*</span><a name="l00057"></a>00057 <span class="comment"> * uIP is a small implementation of the IP, UDP and TCP protocols (as</span><a name="l00058"></a>00058 <span class="comment"> * well as some basic ICMP stuff). The implementation couples the IP,</span><a name="l00059"></a>00059 <span class="comment"> * UDP, TCP and the application layers very tightly. To keep the size</span><a name="l00060"></a>00060 <span class="comment"> * of the compiled code down, this code frequently uses the goto</span><a name="l00061"></a>00061 <span class="comment"> * statement. While it would be possible to break the uip_process()</span><a name="l00062"></a>00062 <span class="comment"> * function into many smaller functions, this would increase the code</span><a name="l00063"></a>00063 <span class="comment"> * size because of the overhead of parameter passing and the fact that</span><a name="l00064"></a>00064 <span class="comment"> * the optimier would not be as efficient.</span><a name="l00065"></a>00065 <span class="comment"> *</span><a name="l00066"></a>00066 <span class="comment"> * The principle is that we have a small buffer, called the uip_buf,</span><a name="l00067"></a>00067 <span class="comment"> * in which the device driver puts an incoming packet. The TCP/IP</span><a name="l00068"></a>00068 <span class="comment"> * stack parses the headers in the packet, and calls the</span><a name="l00069"></a>00069 <span class="comment"> * application. If the remote host has sent data to the application,</span><a name="l00070"></a>00070 <span class="comment"> * this data is present in the uip_buf and the application read the</span><a name="l00071"></a>00071 <span class="comment"> * data from there. It is up to the application to put this data into</span><a name="l00072"></a>00072 <span class="comment"> * a byte stream if needed. The application will not be fed with data</span><a name="l00073"></a>00073 <span class="comment"> * that is out of sequence.</span><a name="l00074"></a>00074 <span class="comment"> *</span><a name="l00075"></a>00075 <span class="comment"> * If the application whishes to send data to the peer, it should put</span><a name="l00076"></a>00076 <span class="comment"> * its data into the uip_buf. The uip_appdata pointer points to the</span><a name="l00077"></a>00077 <span class="comment"> * first available byte. The TCP/IP stack will calculate the</span><a name="l00078"></a>00078 <span class="comment"> * checksums, and fill in the necessary header fields and finally send</span><a name="l00079"></a>00079 <span class="comment"> * the packet back to the peer.</span><a name="l00080"></a>00080 <span class="comment">*/</span><a name="l00081"></a>00081 <a name="l00082"></a>00082 <span class="preprocessor">#include "<a class="code" href="a00136.html">uip.h</a>"</span><a name="l00083"></a>00083 <span class="preprocessor">#include "<a class="code" href="a00140.html">uipopt.h</a>"</span><a name="l00084"></a>00084 <span class="preprocessor">#include "<a class="code" href="a00137.html">uip_arch.h</a>"</span><a name="l00085"></a>00085 <a name="l00086"></a>00086 <span class="preprocessor">#if UIP_CONF_IPV6</span><a name="l00087"></a>00087 <span class="preprocessor"></span><span class="preprocessor">#include "<a class="code" href="a00132.html">uip-neighbor.h</a>"</span><a name="l00088"></a>00088 <span class="preprocessor">#endif </span><span class="comment">/* UIP_CONF_IPV6 */</span><a name="l00089"></a>00089 <a name="l00090"></a>00090 <span class="preprocessor">#include <string.h></span><a name="l00091"></a>00091 <a name="l00092"></a>00092 <span class="comment">/*---------------------------------------------------------------------------*/</span><a name="l00093"></a>00093 <span class="comment">/* Variable definitions. */</span><a name="l00094"></a>00094 <a name="l00095"></a>00095 <a name="l00096"></a>00096 <span class="comment">/* The IP address of this host. If it is defined to be fixed (by</span><a name="l00097"></a>00097 <span class="comment"> setting UIP_FIXEDADDR to 1 in uipopt.h), the address is set</span><a name="l00098"></a>00098 <span class="comment"> here. Otherwise, the address */</span><a name="l00099"></a>00099 <span class="preprocessor">#if UIP_FIXEDADDR > 0</span><a name="l00100"></a>00100 <span class="preprocessor"></span><span class="keyword">const</span> <a class="code" href="a00150.html#g1ef35301f43a5bbb9f89f07b5a36b9a0">uip_ipaddr_t</a> <a class="code" href="a00150.html#g7d3673f52f5846b6961d23b150decd54">uip_hostaddr</a> =<a name="l00101"></a>00101 {<a class="code" href="a00148.html#g69a7a4951ff21b302267532c21ee78fc">HTONS</a>((UIP_IPADDR0 << 8) | UIP_IPADDR1),⌨️ 快捷键说明
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