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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> | <a class="qindex" href="pages.html">Related Pages</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 : 9/20/2005</span>00009 <span class="comment">// Version : 0.3</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#ga6">NETSTACK_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">netstackInit</a>(uint32_t ipaddress, uint32_t netmask, uint32_t gatewayip)00023 {00024 <span class="comment">// init network device driver</span>00025 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span>00026 <span class="preprocessor"></span> rprintf(<span class="stringliteral">"Initializing Network Device\r\n"</span>);00027 <span class="preprocessor"> #endif</span>00028 <span class="preprocessor"></span> <a class="code" href="group__nic.html#ga0">nicInit</a>();00029 <span class="comment">// init ARP</span>00030 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span>00031 <span class="preprocessor"></span> rprintf(<span class="stringliteral">"Initializing ARP cache\r\n"</span>);00032 <span class="preprocessor"> #endif</span>00033 <span class="preprocessor"></span> <a class="code" href="group__arp.html#ga0">arpInit</a>();00034 <span class="comment">// init addressing</span>00035 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span>00036 <span class="preprocessor"></span> rprintf(<span class="stringliteral">"Initializing Addressing\r\n"</span>);00037 <span class="preprocessor"> #endif</span>00038 <span class="preprocessor"></span> <a class="code" href="group__ip.html#ga0">ipSetConfig</a>(ipaddress, netmask, gatewayip);00039 }00040 <a name="l00041"></a><a class="code" href="group__netstack.html#ga1">00041</a> u08* <a class="code" href="group__netstack.html#ga1">netstackGetBuffer</a>(<span class="keywordtype">void</span>)00042 {00043 <span class="keywordflow">return</span> NetBuffer;00044 }00045 <a name="l00046"></a><a class="code" href="group__netstack.html#ga2">00046</a> <span class="keywordtype">int</span> <a class="code" href="group__netstack.html#ga2">netstackService</a>(<span class="keywordtype">void</span>)00047 {00048 <span class="keywordtype">int</span> len;00049 <span class="keyword">struct </span>netEthHeader* ethPacket;00050 00051 <span class="comment">// look for a packet</span>00052 len = <a class="code" href="group__nic.html#ga2">nicPoll</a>(<a class="code" href="group__netstack.html#ga6">NETSTACK_BUFFERSIZE</a>, NetBuffer);00053 00054 <span class="keywordflow">if</span>(len)00055 {00056 ethPacket = (<span class="keyword">struct </span>netEthHeader*)&NetBuffer[0];00057 00058 <span class="preprocessor"> #if NET_DEBUG >= 5</span>00059 <span class="preprocessor"></span> rprintf(<span class="stringliteral">"Received packet len: %d, type:"</span>, len);00060 <a class="code" href="group__rprintf.html#ga8">rprintfu16</a>(<a class="code" href="group__net.html#ga2">htons</a>(ethPacket->type));00061 <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>();00062 rprintf(<span class="stringliteral">"Packet Contents\r\n"</span>);00063 <a class="code" href="debug_8c.html#a0">debugPrintHexTable</a>(len, NetBuffer);00064 <span class="preprocessor"> #endif</span>00065 <span class="preprocessor"></span> 00066 <span class="keywordflow">if</span>(ethPacket->type == <a class="code" href="group__net.html#ga2">htons</a>(ETHTYPE_IP))00067 {00068 <span class="comment">// process an IP packet</span>00069 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span>00070 <span class="preprocessor"></span> <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"NET Rx: IP packet\r\n"</span>);00071 <span class="preprocessor"> #endif</span>00072 <span class="preprocessor"></span> <span class="comment">// add the source to the ARP cache</span>00073 <span class="comment">// also correctly set the ethernet packet length before processing?</span>00074 <a class="code" href="group__arp.html#ga3">arpIpIn</a>((<span class="keyword">struct</span> netEthIpHeader*)&NetBuffer[0]);00075 <span class="comment">//arpPrintTable();</span>00076 00077 <a class="code" href="group__netstack.html#ga3">netstackIPProcess</a>( len-ETH_HEADER_LEN, (ip_hdr*)&NetBuffer[ETH_HEADER_LEN] );00078 }00079 <span class="keywordflow">else</span> <span class="keywordflow">if</span>(ethPacket->type == <a class="code" href="group__net.html#ga2">htons</a>(ETHTYPE_ARP))00080 {00081 <span class="comment">// process an ARP packet</span>00082 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span>00083 <span class="preprocessor"></span> <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"NET Rx: ARP packet\r\n"</span>);00084 <span class="preprocessor"> #endif</span>00085 <span class="preprocessor"></span> <a class="code" href="group__arp.html#ga2">arpArpIn</a>(len, ((<span class="keyword">struct</span> netEthArpHeader*)&NetBuffer[0]) );00086 }00087 }00088 <span class="keywordflow">return</span> len;00089 }00090 <a name="l00091"></a><a class="code" href="group__netstack.html#ga3">00091</a> <span class="keywordtype">void</span> <a class="code" href="group__netstack.html#ga3">netstackIPProcess</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> len, ip_hdr* packet)00092 {00093 <span class="comment">// check IP addressing, stop processing if not for me and not a broadcast</span>00094 <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">ipGetConfig</a>()->ip) &&00095 (<a class="code" href="group__net.html#ga3">htonl</a>(packet->destipaddr) != (<a class="code" href="group__ip.html#ga1">ipGetConfig</a>()->ip|<a class="code" href="group__ip.html#ga1">ipGetConfig</a>()->netmask)) &&00096 (<a class="code" href="group__net.html#ga3">htonl</a>(packet->destipaddr) != 0xFFFFFFFF) ) 00097 <span class="keywordflow">return</span>;00098 00099 <span class="comment">// handle ICMP packet</span>00100 <span class="keywordflow">if</span>( packet->proto == IP_PROTO_ICMP )00101 {00102 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span>00103 <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>);00104 <span class="comment">//icmpPrintHeader((icmpip_hdr*)packet);</span>00105 <span class="preprocessor"> #endif</span>00106 <span class="preprocessor"></span> <a class="code" href="group__icmp.html#ga1">icmpIpIn</a>((icmpip_hdr*)packet);00107 }00108 <span class="keywordflow">else</span> <span class="keywordflow">if</span>( packet->proto == IP_PROTO_UDP )00109 {00110 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span>00111 <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>);00112 <span class="comment">//debugPrintHexTable(NetBufferLen-14, &NetBuffer[14]);</span>00113 <span class="preprocessor"> #endif</span>00114 <span class="preprocessor"></span> <a class="code" href="group__netstack.html#ga4">netstackUDPIPProcess</a>(len, ((udpip_hdr*)packet) );00115 }00116 <span class="keywordflow">else</span> <span class="keywordflow">if</span>( packet->proto == IP_PROTO_TCP )00117 {00118 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span>00119 <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>);00120 <span class="preprocessor"> #endif</span>00121 <span class="preprocessor"></span> <a class="code" href="group__netstack.html#ga5">netstackTCPIPProcess</a>(len, ((tcpip_hdr*)packet) );00122 }00123 <span class="keywordflow">else</span>00124 {00125 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span>00126 <span class="preprocessor"></span> <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"NET Rx: IP packet\r\n"</span>);00127 <span class="preprocessor"> #endif</span>00128 <span class="preprocessor"></span> }00129 }00130 <a name="l00131"></a><a class="code" href="group__netstack.html#ga4">00131</a> <span class="keywordtype">void</span> <a class="code" href="group__netstack.html#ga4">netstackUDPIPProcess</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> len, udpip_hdr* packet)00132 {00133 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span>00134 <span class="preprocessor"></span> rprintf(<span class="stringliteral">"NetStack UDP/IP Rx Dummy Handler\r\n"</span>);00135 <span class="preprocessor"> #endif</span>00136 <span class="preprocessor"></span>}00137 <a name="l00138"></a><a class="code" href="group__netstack.html#ga5">00138</a> <span class="keywordtype">void</span> <a class="code" href="group__netstack.html#ga5">netstackTCPIPProcess</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> len, tcpip_hdr* packet)00139 {00140 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span>00141 <span class="preprocessor"></span> rprintf(<span class="stringliteral">"NetStack TCP/IP Rx Dummy Handler\r\n"</span>);00142 <span class="preprocessor"> #endif</span>00143 <span class="preprocessor"></span>}</pre></div><hr size="1"><address style="align: right;"><small>Generated on Sun Oct 29 03:41:07 2006 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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