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<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*)&amp;NetBuffer[0];
00057 
00058 <span class="preprocessor">        #if NET_DEBUG &gt;= 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-&gt;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-&gt;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*)&amp;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*)&amp;NetBuffer[ETH_HEADER_LEN] );
00078         }
00079         <span class="keywordflow">else</span> <span class="keywordflow">if</span>(ethPacket-&gt;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*)&amp;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-&gt;destipaddr) != <a class="code" href="group__ip.html#ga1">ipGetConfig</a>()-&gt;ip) &amp;&amp;
00095         (<a class="code" href="group__net.html#ga3">htonl</a>(packet-&gt;destipaddr) != (<a class="code" href="group__ip.html#ga1">ipGetConfig</a>()-&gt;ip|<a class="code" href="group__ip.html#ga1">ipGetConfig</a>()-&gt;netmask)) &amp;&amp;
00096         (<a class="code" href="group__net.html#ga3">htonl</a>(packet-&gt;destipaddr) != 0xFFFFFFFF) ) 
00097         <span class="keywordflow">return</span>;
00098 
00099     <span class="comment">// handle ICMP packet</span>
00100     <span class="keywordflow">if</span>( packet-&gt;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-&gt;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, &amp;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-&gt;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&nbsp;
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