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<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>
00002 <span class="comment">//*****************************************************************************</span>
00003 <span class="comment">//</span>
00004 <span class="comment">// File Name : 'ip.c'</span>
00005 <span class="comment">// Title : IP (Internet Protocol) Library</span>
00006 <span class="comment">// Author : Pascal Stang</span>
00007 <span class="comment">// Created : 8/30/2004</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
00016 <span class="preprocessor">#include <inttypes.h></span>
00017 <span class="preprocessor">#include "<a class="code" href="global_8h.html">global.h</a>"</span>
00018 <span class="preprocessor">#include "<a class="code" href="rprintf_8h.html">rprintf.h</a>"</span>
00019
00020 <span class="preprocessor">#include "<a class="code" href="net_8h.html">net.h</a>"</span>
00021 <span class="preprocessor">#include "<a class="code" href="nic_8h.html">nic.h</a>"</span>
00022 <span class="preprocessor">#include "<a class="code" href="arp_8h.html">arp.h</a>"</span>
00023 <span class="preprocessor">#include "<a class="code" href="ip_8h.html">ip.h</a>"</span>
00024
<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">///< Local IP address/config structure</span>
00026 <span class="comment"></span>
00027
<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)
00029 {
00030 <span class="keyword">struct </span>netEthAddr ethaddr;
00031
00032 <span class="comment">// set local addressing</span>
00033 IpMyConfig.<a class="code" href="structipConfig.html#o0">ip</a> = myIp;
00034 IpMyConfig.<a class="code" href="structipConfig.html#o1">netmask</a> = netmask;
00035 IpMyConfig.<a class="code" href="structipConfig.html#o2">gateway</a> = gatewayIp;
00036
00037 <span class="comment">// set ARP association</span>
00038 nicGetMacAddress(ethaddr.addr);
00039 <a class="code" href="group__arp.html#ga1">arpSetAddress</a>(&ethaddr, myIp);
00040 }
00041
<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>)
00043 {
00044 <span class="keywordflow">return</span> &IpMyConfig;
00045 }
00046
00047 <span class="comment">// deprecated</span>
00048 <span class="comment">/*</span>
00049 <span class="comment">uint32_t ipGetMyAddress(void)</span>
00050 <span class="comment">{</span>
00051 <span class="comment"> return IpMyConfig.ip;</span>
00052 <span class="comment">}</span>
00053 <span class="comment">*/</span>
00054
<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)
00056 {
00057 <span class="comment">// make pointer to ethernet/IP header</span>
00058 <span class="keyword">struct </span>netEthIpHeader* ethIpHeader;
00059
00060 <span class="comment">// move data pointer to make room for headers</span>
00061 data -= ETH_HEADER_LEN+IP_HEADER_LEN;
00062 ethIpHeader = (<span class="keyword">struct </span>netEthIpHeader*)data;
00063
00064 <span class="comment">// debugPrintHexTable(len+ETH_HEADER_LEN+IP_HEADER_LEN, data);</span>
00065
00066 <span class="comment">// adjust length to add IP header</span>
00067 len += IP_HEADER_LEN;
00068
00069 <span class="comment">// fill IP header</span>
00070 ethIpHeader->ip.destipaddr = <a class="code" href="group__net.html#ga34">HTONL</a>(dstIp);
00071 ethIpHeader->ip.srcipaddr = <a class="code" href="group__net.html#ga34">HTONL</a>(IpMyConfig.<a class="code" href="structipConfig.html#o0">ip</a>);
00072 ethIpHeader->ip.proto = protocol;
00073 ethIpHeader->ip.len = <a class="code" href="group__net.html#ga2">htons</a>(len);
00074 ethIpHeader->ip.vhl = 0x45;
00075 ethIpHeader->ip.tos = 0;
00076 ethIpHeader->ip.ipid = 0;
00077 ethIpHeader->ip.ipoffset = 0;
00078 ethIpHeader->ip.ttl = <a class="code" href="group__ip.html#ga5">IP_TIME_TO_LIVE</a>;
00079 ethIpHeader->ip.ipchksum = 0;
00080
00081 <span class="comment">// calculate and apply IP checksum</span>
00082 <span class="comment">// DO THIS ONLY AFTER ALL CHANGES HAVE BEEN MADE TO IP HEADER</span>
00083 ethIpHeader->ip.ipchksum = <a class="code" href="group__net.html#ga4">netChecksum</a>(&ethIpHeader->ip, IP_HEADER_LEN);
00084
00085 <span class="comment">// add ethernet routing</span>
00086 <span class="comment">// check if we need to send to gateway</span>
00087 <span class="keywordflow">if</span>( (dstIp & IpMyConfig.<a class="code" href="structipConfig.html#o1">netmask</a>) == (IpMyConfig.<a class="code" href="structipConfig.html#o0">ip</a> & IpMyConfig.<a class="code" href="structipConfig.html#o1">netmask</a>) )
00088 {
00089 <a class="code" href="group__arp.html#ga4">arpIpOut</a>(ethIpHeader,0); <span class="comment">// local send</span>
00090 <span class="comment">//rprintf("Sending IP packet on local net\r\n");</span>
00091 }
00092 <span class="keywordflow">else</span>
00093 {
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>
00095 <span class="comment">//rprintf("Sending IP packet to gateway\r\n");</span>
00096 }
00097
00098 <span class="comment">// adjust length to add ethernet header</span>
00099 len += ETH_HEADER_LEN;
00100
00101 <span class="comment">// debug</span>
00102 <span class="comment">//debugPrintHexTable(ETH_HEADER_LEN, &data[0]);</span>
00103 <span class="comment">//debugPrintHexTable(len-ETH_HEADER_LEN, &data[ETH_HEADER_LEN]);</span>
00104
00105 <span class="comment">// send it</span>
00106 <a class="code" href="group__nic.html#ga1">nicSend</a>(len, data);
00107 }
00108
<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)
00110 {
00111 <span class="comment">// make pointer to UDP header</span>
00112 <span class="keyword">struct </span>netUdpHeader* udpHeader;
00113 <span class="comment">// move data pointer to make room for UDP header</span>
00114 data -= UDP_HEADER_LEN;
00115 udpHeader = (<span class="keyword">struct </span>netUdpHeader*)data;
00116 <span class="comment">// adjust length to add UDP header</span>
00117 len += UDP_HEADER_LEN;
00118 <span class="comment">// fill UDP header</span>
00119 udpHeader->destport = <a class="code" href="group__net.html#ga33">HTONS</a>(dstPort);
00120 udpHeader->srcport = <a class="code" href="group__net.html#ga33">HTONS</a>(dstPort);
00121 udpHeader->udplen = <a class="code" href="group__net.html#ga2">htons</a>(len);
00122 udpHeader->udpchksum = 0;
00123
00124 <span class="comment">// debugPrintHexTable(UDP_HEADER_LEN, (uint8_t*)udpPacket);</span>
00125
00126 <a class="code" href="group__ip.html#ga3">ipSend</a>(dstIp, IP_PROTO_UDP, len, (uint8_t*)udpHeader);
00127 }
00128
<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)
00130 {
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-><a class="code" href="structipConfig.html#o0">ip</a>); <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>();
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-><a class="code" href="structipConfig.html#o1">netmask</a>); <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>();
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-><a class="code" href="structipConfig.html#o2">gateway</a>); <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>();
00134 }
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