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3 <title>Procyon AVRlib: net/netstack.c Source File</title>
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10 <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>
11 00002 <span class="comment">//*****************************************************************************</span>
12 00003 <span class="comment">//</span>
13 00004 <span class="comment">// File Name : 'netstack.c'</span>
14 00005 <span class="comment">// Title : Network Stack</span>
15 00006 <span class="comment">// Author : Pascal Stang</span>
16 00007 <span class="comment">// Created : 6/28/2005</span>
17 00008 <span class="comment">// Revised : 9/20/2005</span>
18 00009 <span class="comment">// Version : 0.3</span>
19 00010 <span class="comment">// Target MCU : Atmel AVR series</span>
20 00011 <span class="comment">// Editor Tabs : 4</span>
21 00012 <span class="comment">//</span>
22 00013 <span class="comment">//*****************************************************************************</span>
23 00014
24 00015 <span class="preprocessor">#include "<a class="code" href="rprintf_8h.html">rprintf.h</a>"</span>
25 00016 <span class="preprocessor">#include "<a class="code" href="debug_8h.html">debug.h</a>"</span>
26 00017
27 00018 <span class="preprocessor">#include "<a class="code" href="netstack_8h.html">netstack.h</a>"</span>
28 00019
29 00020 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> NetBuffer[<a class="code" href="group__netstack.html#ga6">NETSTACK_BUFFERSIZE</a>];
30 00021
31 <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)
32 00023 {
33 00024 <span class="comment">// init network device driver</span>
34 00025 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span>
35 00026 <span class="preprocessor"></span> rprintf(<span class="stringliteral">"Initializing Network Device\r\n"</span>);
36 00027 <span class="preprocessor"> #endif</span>
37 00028 <span class="preprocessor"></span> <a class="code" href="group__nic.html#ga0">nicInit</a>();
38 00029 <span class="comment">// init ARP</span>
39 00030 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span>
40 00031 <span class="preprocessor"></span> rprintf(<span class="stringliteral">"Initializing ARP cache\r\n"</span>);
41 00032 <span class="preprocessor"> #endif</span>
42 00033 <span class="preprocessor"></span> <a class="code" href="group__arp.html#ga0">arpInit</a>();
43 00034 <span class="comment">// init addressing</span>
44 00035 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span>
45 00036 <span class="preprocessor"></span> rprintf(<span class="stringliteral">"Initializing Addressing\r\n"</span>);
46 00037 <span class="preprocessor"> #endif</span>
47 00038 <span class="preprocessor"></span> <a class="code" href="group__ip.html#ga0">ipSetConfig</a>(ipaddress, netmask, gatewayip);
48 00039 }
49 00040
50 <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>)
51 00042 {
52 00043 <span class="keywordflow">return</span> NetBuffer;
53 00044 }
54 00045
55 <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>)
56 00047 {
57 00048 <span class="keywordtype">int</span> len;
58 00049 <span class="keyword">struct </span>netEthHeader* ethPacket;
59 00050
60 00051 <span class="comment">// look for a packet</span>
61 00052 len = <a class="code" href="group__nic.html#ga2">nicPoll</a>(<a class="code" href="group__netstack.html#ga6">NETSTACK_BUFFERSIZE</a>, NetBuffer);
62 00053
63 00054 <span class="keywordflow">if</span>(len)
64 00055 {
65 00056 ethPacket = (<span class="keyword">struct </span>netEthHeader*)&amp;NetBuffer[0];
66 00057
67 00058 <span class="preprocessor"> #if NET_DEBUG &gt;= 5</span>
68 00059 <span class="preprocessor"></span> rprintf(<span class="stringliteral">"Received packet len: %d, type:"</span>, len);
69 00060 <a class="code" href="group__rprintf.html#ga8">rprintfu16</a>(<a class="code" href="group__net.html#ga2">htons</a>(ethPacket-&gt;type));
70 00061 <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>();
71 00062 rprintf(<span class="stringliteral">"Packet Contents\r\n"</span>);
72 00063 <a class="code" href="debug_8c.html#a0">debugPrintHexTable</a>(len, NetBuffer);
73 00064 <span class="preprocessor"> #endif</span>
74 00065 <span class="preprocessor"></span>
75 00066 <span class="keywordflow">if</span>(ethPacket-&gt;type == <a class="code" href="group__net.html#ga2">htons</a>(ETHTYPE_IP))
76 00067 {
77 00068 <span class="comment">// process an IP packet</span>
78 00069 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span>
79 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>);
80 00071 <span class="preprocessor"> #endif</span>
81 00072 <span class="preprocessor"></span> <span class="comment">// add the source to the ARP cache</span>
82 00073 <span class="comment">// also correctly set the ethernet packet length before processing?</span>
83 00074 <a class="code" href="group__arp.html#ga3">arpIpIn</a>((<span class="keyword">struct</span> netEthIpHeader*)&amp;NetBuffer[0]);
84 00075 <span class="comment">//arpPrintTable();</span>
85 00076
86 00077 <a class="code" href="group__netstack.html#ga3">netstackIPProcess</a>( len-ETH_HEADER_LEN, (ip_hdr*)&amp;NetBuffer[ETH_HEADER_LEN] );
87 00078 }
88 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))
89 00080 {
90 00081 <span class="comment">// process an ARP packet</span>
91 00082 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span>
92 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>);
93 00084 <span class="preprocessor"> #endif</span>
94 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]) );
95 00086 }
96 00087 }
97 00088 <span class="keywordflow">return</span> len;
98 00089 }
99 00090
100 <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)
101 00092 {
102 00093 <span class="comment">// check IP addressing, stop processing if not for me and not a broadcast</span>
103 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;
104 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;
105 00096 (<a class="code" href="group__net.html#ga3">htonl</a>(packet-&gt;destipaddr) != 0xFFFFFFFF) )
106 00097 <span class="keywordflow">return</span>;
107 00098
108 00099 <span class="comment">// handle ICMP packet</span>
109 00100 <span class="keywordflow">if</span>( packet-&gt;proto == IP_PROTO_ICMP )
110 00101 {
111 00102 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span>
112 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>);
113 00104 <span class="comment">//icmpPrintHeader((icmpip_hdr*)packet);</span>
114 00105 <span class="preprocessor"> #endif</span>
115 00106 <span class="preprocessor"></span> <a class="code" href="group__icmp.html#ga1">icmpIpIn</a>((icmpip_hdr*)packet);
116 00107 }
117 00108 <span class="keywordflow">else</span> <span class="keywordflow">if</span>( packet-&gt;proto == IP_PROTO_UDP )
118 00109 {
119 00110 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span>
120 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>);
121 00112 <span class="comment">//debugPrintHexTable(NetBufferLen-14, &amp;NetBuffer[14]);</span>
122 00113 <span class="preprocessor"> #endif</span>
123 00114 <span class="preprocessor"></span> <a class="code" href="group__netstack.html#ga4">netstackUDPIPProcess</a>(len, ((udpip_hdr*)packet) );
124 00115 }
125 00116 <span class="keywordflow">else</span> <span class="keywordflow">if</span>( packet-&gt;proto == IP_PROTO_TCP )
126 00117 {
127 00118 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span>
128 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>);
129 00120 <span class="preprocessor"> #endif</span>
130 00121 <span class="preprocessor"></span> <a class="code" href="group__netstack.html#ga5">netstackTCPIPProcess</a>(len, ((tcpip_hdr*)packet) );
131 00122 }
132 00123 <span class="keywordflow">else</span>
133 00124 {
134 00125 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span>
135 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>);
136 00127 <span class="preprocessor"> #endif</span>
137 00128 <span class="preprocessor"></span> }
138 00129 }
139 00130
140 <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)
141 00132 {
142 00133 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span>
143 00134 <span class="preprocessor"></span> rprintf(<span class="stringliteral">"NetStack UDP/IP Rx Dummy Handler\r\n"</span>);
144 00135 <span class="preprocessor"> #endif</span>
145 00136 <span class="preprocessor"></span>}
146 00137
147 <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)
148 00139 {
149 00140 <span class="preprocessor"> #ifdef NETSTACK_DEBUG</span>
150 00141 <span class="preprocessor"></span> rprintf(<span class="stringliteral">"NetStack TCP/IP Rx Dummy Handler\r\n"</span>);
151 00142 <span class="preprocessor"> #endif</span>
152 00143 <span class="preprocessor"></span>}
153 </pre></div><hr size="1"><address style="align: right;"><small>Generated on Sun Oct 29 03:41:07 2006 for Procyon AVRlib by&nbsp;
154 <a href="http://www.doxygen.org/index.html">
155 <img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.4.2 </small></address>
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