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3 <title>Procyon AVRlib: net/ip.c Source File</title>
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10 <h1>ip.c</h1><a href="ip_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment">00001 <span class="comment">/*! \file ip.c \brief IP (Internet Protocol) Library. */</span>
11 00002 <span class="comment">//*****************************************************************************</span>
12 00003 <span class="comment">//</span>
13 00004 <span class="comment">// File Name : 'ip.c'</span>
14 00005 <span class="comment">// Title : IP (Internet Protocol) Library</span>
15 00006 <span class="comment">// Author : Pascal Stang</span>
16 00007 <span class="comment">// Created : 8/30/2004</span>
17 00008 <span class="comment">// Revised : 7/3/2005</span>
18 00009 <span class="comment">// Version : 0.1</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
25 00016 <span class="preprocessor">#include &lt;inttypes.h&gt;</span>
26 00017 <span class="preprocessor">#include "<a class="code" href="global_8h.html">global.h</a>"</span>
27 00018 <span class="preprocessor">#include "<a class="code" href="rprintf_8h.html">rprintf.h</a>"</span>
28 00019
29 00020 <span class="preprocessor">#include "<a class="code" href="net_8h.html">net.h</a>"</span>
30 00021 <span class="preprocessor">#include "<a class="code" href="nic_8h.html">nic.h</a>"</span>
31 00022 <span class="preprocessor">#include "<a class="code" href="arp_8h.html">arp.h</a>"</span>
32 00023 <span class="preprocessor">#include "<a class="code" href="ip_8h.html">ip.h</a>"</span>
33 00024
34 <a name="l00025"></a><a class="code" href="ip_8c.html#a0">00025</a> <span class="keyword">struct </span><a class="code" href="structipConfig.html">ipConfig</a> IpMyConfig; <span class="comment">///&lt; Local IP address/config structure</span>
35 00026 <span class="comment"></span>
36 00027
37 <a name="l00028"></a><a class="code" href="group__ip.html#ga0">00028</a> <span class="keywordtype">void</span> <a class="code" href="group__ip.html#ga0">ipSetConfig</a>(uint32_t myIp, uint32_t <a class="code" href="structipConfig.html#o1">netmask</a>, uint32_t gatewayIp)
38 00029 {
39 00030 <span class="keyword">struct </span>netEthAddr ethaddr;
40 00031
41 00032 <span class="comment">// set local addressing</span>
42 00033 IpMyConfig.<a class="code" href="structipConfig.html#o0">ip</a> = myIp;
43 00034 IpMyConfig.<a class="code" href="structipConfig.html#o1">netmask</a> = netmask;
44 00035 IpMyConfig.<a class="code" href="structipConfig.html#o2">gateway</a> = gatewayIp;
45 00036
46 00037 <span class="comment">// set ARP association</span>
47 00038 nicGetMacAddress(ethaddr.addr);
48 00039 <a class="code" href="group__arp.html#ga1">arpSetAddress</a>(&amp;ethaddr, myIp);
49 00040 }
50 00041
51 <a name="l00042"></a><a class="code" href="group__ip.html#ga1">00042</a> <span class="keyword">struct </span><a class="code" href="structipConfig.html">ipConfig</a>* <a class="code" href="group__ip.html#ga1">ipGetConfig</a>(<span class="keywordtype">void</span>)
52 00043 {
53 00044 <span class="keywordflow">return</span> &amp;IpMyConfig;
54 00045 }
55 00046
56 00047 <span class="comment">// deprecated</span>
57 00048 <span class="comment">/*</span>
58 00049 <span class="comment">uint32_t ipGetMyAddress(void)</span>
59 00050 <span class="comment">{</span>
60 00051 <span class="comment"> return IpMyConfig.ip;</span>
61 00052 <span class="comment">}</span>
62 00053 <span class="comment">*/</span>
63 00054
64 <a name="l00055"></a><a class="code" href="group__ip.html#ga3">00055</a> <span class="keywordtype">void</span> <a class="code" href="group__ip.html#ga3">ipSend</a>(uint32_t dstIp, uint8_t protocol, uint16_t len, uint8_t* data)
65 00056 {
66 00057 <span class="comment">// make pointer to ethernet/IP header</span>
67 00058 <span class="keyword">struct </span>netEthIpHeader* ethIpHeader;
68 00059
69 00060 <span class="comment">// move data pointer to make room for headers</span>
70 00061 data -= ETH_HEADER_LEN+IP_HEADER_LEN;
71 00062 ethIpHeader = (<span class="keyword">struct </span>netEthIpHeader*)data;
72 00063
73 00064 <span class="comment">// debugPrintHexTable(len+ETH_HEADER_LEN+IP_HEADER_LEN, data);</span>
74 00065
75 00066 <span class="comment">// adjust length to add IP header</span>
76 00067 len += IP_HEADER_LEN;
77 00068
78 00069 <span class="comment">// fill IP header</span>
79 00070 ethIpHeader-&gt;ip.destipaddr = <a class="code" href="group__net.html#ga34">HTONL</a>(dstIp);
80 00071 ethIpHeader-&gt;ip.srcipaddr = <a class="code" href="group__net.html#ga34">HTONL</a>(IpMyConfig.<a class="code" href="structipConfig.html#o0">ip</a>);
81 00072 ethIpHeader-&gt;ip.proto = protocol;
82 00073 ethIpHeader-&gt;ip.len = <a class="code" href="group__net.html#ga2">htons</a>(len);
83 00074 ethIpHeader-&gt;ip.vhl = 0x45;
84 00075 ethIpHeader-&gt;ip.tos = 0;
85 00076 ethIpHeader-&gt;ip.ipid = 0;
86 00077 ethIpHeader-&gt;ip.ipoffset = 0;
87 00078 ethIpHeader-&gt;ip.ttl = <a class="code" href="group__ip.html#ga5">IP_TIME_TO_LIVE</a>;
88 00079 ethIpHeader-&gt;ip.ipchksum = 0;
89 00080
90 00081 <span class="comment">// calculate and apply IP checksum</span>
91 00082 <span class="comment">// DO THIS ONLY AFTER ALL CHANGES HAVE BEEN MADE TO IP HEADER</span>
92 00083 ethIpHeader-&gt;ip.ipchksum = <a class="code" href="group__net.html#ga4">netChecksum</a>(&amp;ethIpHeader-&gt;ip, IP_HEADER_LEN);
93 00084
94 00085 <span class="comment">// add ethernet routing</span>
95 00086 <span class="comment">// check if we need to send to gateway</span>
96 00087 <span class="keywordflow">if</span>( (dstIp &amp; IpMyConfig.<a class="code" href="structipConfig.html#o1">netmask</a>) == (IpMyConfig.<a class="code" href="structipConfig.html#o0">ip</a> &amp; IpMyConfig.<a class="code" href="structipConfig.html#o1">netmask</a>) )
97 00088 {
98 00089 <a class="code" href="group__arp.html#ga4">arpIpOut</a>(ethIpHeader,0); <span class="comment">// local send</span>
99 00090 <span class="comment">//rprintf("Sending IP packet on local net\r\n");</span>
100 00091 }
101 00092 <span class="keywordflow">else</span>
102 00093 {
103 00094 <a class="code" href="group__arp.html#ga4">arpIpOut</a>(ethIpHeader,IpMyConfig.<a class="code" href="structipConfig.html#o2">gateway</a>); <span class="comment">// gateway send</span>
104 00095 <span class="comment">//rprintf("Sending IP packet to gateway\r\n");</span>
105 00096 }
106 00097
107 00098 <span class="comment">// adjust length to add ethernet header</span>
108 00099 len += ETH_HEADER_LEN;
109 00100
110 00101 <span class="comment">// debug</span>
111 00102 <span class="comment">//debugPrintHexTable(ETH_HEADER_LEN, &amp;data[0]);</span>
112 00103 <span class="comment">//debugPrintHexTable(len-ETH_HEADER_LEN, &amp;data[ETH_HEADER_LEN]);</span>
113 00104
114 00105 <span class="comment">// send it</span>
115 00106 <a class="code" href="group__nic.html#ga1">nicSend</a>(len, data);
116 00107 }
117 00108
118 <a name="l00109"></a><a class="code" href="group__ip.html#ga4">00109</a> <span class="keywordtype">void</span> <a class="code" href="group__ip.html#ga4">udpSend</a>(uint32_t dstIp, uint16_t dstPort, uint16_t len, uint8_t* data)
119 00110 {
120 00111 <span class="comment">// make pointer to UDP header</span>
121 00112 <span class="keyword">struct </span>netUdpHeader* udpHeader;
122 00113 <span class="comment">// move data pointer to make room for UDP header</span>
123 00114 data -= UDP_HEADER_LEN;
124 00115 udpHeader = (<span class="keyword">struct </span>netUdpHeader*)data;
125 00116 <span class="comment">// adjust length to add UDP header</span>
126 00117 len += UDP_HEADER_LEN;
127 00118 <span class="comment">// fill UDP header</span>
128 00119 udpHeader-&gt;destport = <a class="code" href="group__net.html#ga33">HTONS</a>(dstPort);
129 00120 udpHeader-&gt;srcport = <a class="code" href="group__net.html#ga33">HTONS</a>(dstPort);
130 00121 udpHeader-&gt;udplen = <a class="code" href="group__net.html#ga2">htons</a>(len);
131 00122 udpHeader-&gt;udpchksum = 0;
132 00123
133 00124 <span class="comment">// debugPrintHexTable(UDP_HEADER_LEN, (uint8_t*)udpPacket);</span>
134 00125
135 00126 <a class="code" href="group__ip.html#ga3">ipSend</a>(dstIp, IP_PROTO_UDP, len, (uint8_t*)udpHeader);
136 00127 }
137 00128
138 <a name="l00129"></a><a class="code" href="group__ip.html#ga2">00129</a> <span class="keywordtype">void</span> <a class="code" href="group__ip.html#ga2">ipPrintConfig</a>(<span class="keyword">struct</span> <a class="code" href="structipConfig.html">ipConfig</a>* config)
139 00130 {
140 00131 <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"IP Addr : "</span>); <a class="code" href="group__net.html#ga6">netPrintIPAddr</a>(config-&gt;<a class="code" href="structipConfig.html#o0">ip</a>); <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>();
141 00132 <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"Netmask : "</span>); <a class="code" href="group__net.html#ga6">netPrintIPAddr</a>(config-&gt;<a class="code" href="structipConfig.html#o1">netmask</a>); <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>();
142 00133 <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"Gateway : "</span>); <a class="code" href="group__net.html#ga6">netPrintIPAddr</a>(config-&gt;<a class="code" href="structipConfig.html#o2">gateway</a>); <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>();
143 00134 }
144 </pre></div><hr size="1"><address style="align: right;"><small>Generated on Sun Oct 29 03:41:07 2006 for Procyon AVRlib by&nbsp;
145 <a href="http://www.doxygen.org/index.html">
146 <img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.4.2 </small></address>
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