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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>Procyon AVRlib: net/netstack.c Source File</title><link href="dox.css" rel="stylesheet" type="text/css"></head><body><!-- Generated by Doxygen 1.4.2 --><div class="qindex"><a class="qindex" href="main.html">Main Page</a> | <a class="qindex" href="modules.html">Modules</a> | <a class="qindex" href="annotated.html">Data Structures</a> | <a class="qindex" href="dirs.html">Directories</a> | <a class="qindex" href="files.html">File List</a> | <a class="qindex" href="functions.html">Data Fields</a> | <a class="qindex" href="globals.html">Globals</a></div><div class="nav"><a class="el" href="dir_000001.html">net</a></div><h1>netstack.c</h1><a href="netstack_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment">00001 <span class="comment">/*! \file netstack.c \brief Network Stack. */</span>00002 <span class="comment">//*****************************************************************************</span>00003 <span class="comment">//</span>00004 <span class="comment">// File Name : 'netstack.c'</span>00005 <span class="comment">// Title : Network Stack</span>00006 <span class="comment">// Author : Pascal Stang</span>00007 <span class="comment">// Created : 6/28/2005</span>00008 <span class="comment">// Revised : 7/3/2005</span>00009 <span class="comment">// Version : 0.1</span>00010 <span class="comment">// Target MCU : Atmel AVR series</span>00011 <span class="comment">// Editor Tabs : 4</span>00012 <span class="comment">//</span>00013 <span class="comment">//*****************************************************************************</span>00014 00015 <span class="preprocessor">#include "<a class="code" href="rprintf_8h.html">rprintf.h</a>"</span>00016 <span class="preprocessor">#include "<a class="code" href="debug_8h.html">debug.h</a>"</span>00017 00018 <span class="preprocessor">#include "<a class="code" href="netstack_8h.html">netstack.h</a>"</span>00019 00020 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> NetBuffer[<a class="code" href="group__netstack.html#ga4">NET_BUFFERSIZE</a>];00021 <a name="l00022"></a><a class="code" href="group__netstack.html#ga0">00022</a> <span class="keywordtype">void</span> <a class="code" href="group__netstack.html#ga0">netstackService</a>(<span class="keywordtype">void</span>)00023 {00024 <span class="keywordtype">int</span> len;00025 <span class="keyword">struct </span>netEthHeader* ethPacket;00026 00027 <span class="comment">// look for a packet</span>00028 len = <a class="code" href="group__nic.html#ga2">nicPoll</a>(<a class="code" href="group__netstack.html#ga4">NET_BUFFERSIZE</a>, NetBuffer);00029 00030 <span class="keywordflow">if</span>(len)00031 {00032 ethPacket = (<span class="keyword">struct </span>netEthHeader*)&NetBuffer[0];00033 00034 <span class="comment">//rprintf("Received packet #%d, len: %d, type:", i++, len);</span>00035 <span class="comment">//rprintfu16(htons(ethPacket->type));</span>00036 <span class="comment">//rprintfCRLF();</span>00037 <span class="comment">//rprintf("Packet Contents\r\n");</span>00038 <span class="comment">//debugPrintHexTable(len, NetBuffer);</span>00039 00040 <span class="keywordflow">if</span>(ethPacket->type == <a class="code" href="group__net.html#ga2">htons</a>(ETHTYPE_IP))00041 {00042 <span class="comment">// process an IP packet</span>00043 <span class="comment">//rprintfProgStrM("IP packet\r\n");</span>00044 <span class="comment">// add the source to the ARP cache</span>00045 <span class="comment">// also correctly set the ethernet packet length before processing?</span>00046 <a class="code" href="group__arp.html#ga3">arpIpIn</a>((<span class="keyword">struct</span> netEthIpHeader*)&NetBuffer[0]);00047 <span class="comment">//arpPrintTable();</span>00048 00049 <a class="code" href="group__netstack.html#ga1">netstackIPProcess</a>( len-ETH_HEADER_LEN, (ip_hdr*)&NetBuffer[ETH_HEADER_LEN] );00050 }00051 <span class="keywordflow">else</span> <span class="keywordflow">if</span>(ethPacket->type == <a class="code" href="group__net.html#ga2">htons</a>(ETHTYPE_ARP))00052 {00053 <span class="comment">// process an ARP packet</span>00054 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span>00055 <span class="preprocessor"></span> <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"NET Rx: ARP packet\r\n"</span>);00056 <span class="comment">//arpPrintHeader( ((struct netArpHeader*)&NetBuffer[ETH_HEADER_LEN]) );</span>00057 <span class="preprocessor"> #endif</span>00058 <span class="preprocessor"></span> <a class="code" href="group__arp.html#ga2">arpArpIn</a>(len, ((<span class="keyword">struct</span> netEthArpHeader*)&NetBuffer[0]) );00059 }00060 }00061 }00062 <a name="l00063"></a><a class="code" href="group__netstack.html#ga1">00063</a> <span class="keywordtype">void</span> <a class="code" href="group__netstack.html#ga1">netstackIPProcess</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> len, ip_hdr* packet)00064 {00065 <span class="comment">// check IP addressing, stop processing if not for me and not a broadcast</span>00066 <span class="keywordflow">if</span>( (<a class="code" href="group__net.html#ga3">htonl</a>(packet->destipaddr) != <a class="code" href="group__ip.html#ga1">ipGetMyAddress</a>()) &&00067 (<a class="code" href="group__net.html#ga3">htonl</a>(packet->destipaddr) != (<a class="code" href="group__ip.html#ga1">ipGetMyAddress</a>()|0x000000FF)) )00068 <span class="keywordflow">return</span>;00069 00070 <span class="comment">// handle ICMP packet</span>00071 <span class="keywordflow">if</span>( packet->proto == IP_PROTO_ICMP )00072 {00073 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span>00074 <span class="preprocessor"></span> <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"NET Rx: ICMP/IP packet\r\n"</span>);00075 <span class="comment">//icmpPrintHeader((icmpip_hdr*)packet);</span>00076 <span class="preprocessor"> #endif</span>00077 <span class="preprocessor"></span> <a class="code" href="group__icmp.html#ga1">icmpIpIn</a>((icmpip_hdr*)packet);00078 }00079 <span class="keywordflow">else</span> <span class="keywordflow">if</span>( packet->proto == IP_PROTO_UDP )00080 {00081 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span>00082 <span class="preprocessor"></span> <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"NET Rx: UDP/IP packet\r\n"</span>);00083 <span class="comment">//debugPrintHexTable(NetBufferLen-14, &NetBuffer[14]);</span>00084 <span class="preprocessor"> #endif</span>00085 <span class="preprocessor"></span> <a class="code" href="group__netstack.html#ga2">netstackUDPIPProcess</a>(len, ((udpip_hdr*)packet) );00086 }00087 <span class="keywordflow">else</span> <span class="keywordflow">if</span>( packet->proto == IP_PROTO_TCP )00088 {00089 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span>00090 <span class="preprocessor"></span> <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"NET Rx: TCP/IP packet\r\n"</span>);00091 <span class="preprocessor"> #endif</span>00092 <span class="preprocessor"></span> <a class="code" href="group__netstack.html#ga3">netstackTCPIPProcess</a>(len, ((tcpip_hdr*)packet) );00093 }00094 <span class="keywordflow">else</span>00095 {00096 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span>00097 <span class="preprocessor"></span> <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"NET Rx: IP packet\r\n"</span>);00098 <span class="preprocessor"> #endif</span>00099 <span class="preprocessor"></span> }00100 }00101 <a name="l00102"></a><a class="code" href="group__netstack.html#ga2">00102</a> <span class="keywordtype">void</span> <a class="code" href="group__netstack.html#ga2">netstackUDPIPProcess</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> len, udpip_hdr* packet)00103 {00104 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span>00105 <span class="preprocessor"></span> rprintf(<span class="stringliteral">"NetStack UDP/IP Rx Dummy Handler\r\n"</span>);00106 <span class="preprocessor"> #endif</span>00107 <span class="preprocessor"></span>}00108 <a name="l00109"></a><a class="code" href="group__netstack.html#ga3">00109</a> <span class="keywordtype">void</span> <a class="code" href="group__netstack.html#ga3">netstackTCPIPProcess</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> len, tcpip_hdr* packet)00110 {00111 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span>00112 <span class="preprocessor"></span> rprintf(<span class="stringliteral">"NetStack TCP/IP Rx Dummy Handler\r\n"</span>);00113 <span class="preprocessor"> #endif</span>00114 <span class="preprocessor"></span>}</pre></div><hr size="1"><address style="align: right;"><small>Generated on Mon Aug 22 04:29:27 2005 for Procyon AVRlib by <a href="http://www.doxygen.org/index.html"><img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.4.2 </small></address></body></html>⌨️ 快捷键说明
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