arp_8c-source.html

单片机的软件

00109     }
00110 
00111     <span class="comment">// no space in table, we give up</span>
00112 }
00113 
<a name="l00114"></a><a class="code" href="group__arp.html#ga4">00114</a> <span class="keywordtype">void</span> <a class="code" href="group__arp.html#ga4">arpIpOut</a>(<span class="keyword">struct</span> netEthIpHeader* packet, uint32_t phyDstIp)
00115 {
00116     <span class="keywordtype">int</span> index;
00117     <span class="comment">// check if destination is already present in arp table</span>
00118     <span class="comment">// use the physical dstIp if it's provided, otherwise the dstIp in packet</span>
00119     <span class="keywordflow">if</span>(phyDstIp)
00120         index = <a class="code" href="group__arp.html#ga6">arpMatchIp</a>(phyDstIp);
00121     <span class="keywordflow">else</span>
00122         index = <a class="code" href="group__arp.html#ga6">arpMatchIp</a>(<a class="code" href="group__net.html#ga26">HTONL</a>(packet-&gt;ip.destipaddr));
00123     <span class="comment">// fill in ethernet info</span>
00124     <span class="keywordflow">if</span>(index != -1)
00125     {
00126         <span class="comment">// ARP entry present, fill eth address(es)</span>
00127         packet-&gt;eth.src  = ArpMyAddr.ethaddr;
00128         packet-&gt;eth.dest = ArpTable[index].ethaddr;
00129         packet-&gt;eth.type = <a class="code" href="group__net.html#ga25">HTONS</a>(ETHTYPE_IP);
00130     }
00131     <span class="keywordflow">else</span>
00132     {
00133         <span class="comment">// not in table, must send ARP request</span>
00134         packet-&gt;eth.src = ArpMyAddr.ethaddr;
00135         <span class="comment">// MUST CHANGE, but for now, send this one broadcast</span>
00136         packet-&gt;eth.dest.addr[0] = 0xFF;
00137         packet-&gt;eth.dest.addr[1] = 0xFF;
00138         packet-&gt;eth.dest.addr[2] = 0xFF;
00139         packet-&gt;eth.dest.addr[3] = 0xFF;
00140         packet-&gt;eth.dest.addr[4] = 0xFF;
00141         packet-&gt;eth.dest.addr[5] = 0xFF;
00142         packet-&gt;eth.type = <a class="code" href="group__net.html#ga25">HTONS</a>(ETHTYPE_IP);
00143     }
00144 }
00145 
<a name="l00146"></a><a class="code" href="group__arp.html#ga5">00146</a> <span class="keywordtype">void</span> <a class="code" href="group__arp.html#ga5">arpTimer</a>(<span class="keywordtype">void</span>)
00147 {
00148     <span class="keywordtype">int</span> index;
00149     <span class="comment">// this function meant to be called on a regular time interval</span>
00150 
00151     <span class="comment">// decrement time-to-live for all entries</span>
00152     <span class="keywordflow">for</span>(index=0; index&lt;ARP_TABLE_SIZE; index++)
00153     {
00154         <span class="keywordflow">if</span>(ArpTable[index].time)
00155             ArpTable[index].time--;
00156     }
00157 }
00158 
<a name="l00159"></a><a class="code" href="group__arp.html#ga6">00159</a> <span class="keywordtype">int</span> <a class="code" href="group__arp.html#ga6">arpMatchIp</a>(uint32_t ipaddr)
00160 {
00161     uint8_t i;
00162 
00163     <span class="comment">// check if IP address is present in arp table</span>
00164     <span class="keywordflow">for</span>(i=0; i&lt;ARP_TABLE_SIZE; i++)
00165     {
00166         <span class="keywordflow">if</span>(ArpTable[i].ipaddr == ipaddr)
00167         {
00168             <span class="comment">// IP address found</span>
00169             <span class="keywordflow">return</span> i;
00170         }
00171     }
00172 
00173     <span class="comment">// no match</span>
00174     <span class="keywordflow">return</span> -1;
00175 }
00176 
00177 <span class="preprocessor">#ifdef ARP_DEBUG_PRINT</span>
00178 <span class="preprocessor"></span><span class="keywordtype">void</span> <a class="code" href="group__arp.html#ga7">arpPrintHeader</a>(<span class="keyword">struct</span> netArpHeader* packet)
00179 {
00180     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"ARP Packet:\r\n"</span>);
00181     <span class="comment">//debugPrintHexTable(60, (unsigned char*)&amp;packet);</span>
00182     <span class="comment">// print operation type</span>
00183     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"Operation   : "</span>);
00184     <span class="keywordflow">if</span>(packet-&gt;opcode == <a class="code" href="group__net.html#ga2">htons</a>(ARP_OPCODE_REQUEST))
00185         <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"REQUEST"</span>);
00186     <span class="keywordflow">else</span> <span class="keywordflow">if</span>(packet-&gt;opcode == <a class="code" href="group__net.html#ga2">htons</a>(ARP_OPCODE_REPLY))
00187         <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"REPLY"</span>);
00188     <span class="keywordflow">else</span>
00189         <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"UNKNOWN"</span>);
00190     <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>();
00191     <span class="comment">// print source hardware address</span>
00192     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"SrcHwAddr   : "</span>);  <a class="code" href="group__net.html#ga4">netPrintEthAddr</a>(&amp;packet-&gt;shwaddr);  <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>();
00193     <span class="comment">// print source protocol address</span>
00194     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"SrcProtoAddr: "</span>);  <a class="code" href="group__net.html#ga5">netPrintIPAddr</a>(<a class="code" href="group__net.html#ga26">HTONL</a>(packet-&gt;sipaddr)); <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>();
00195     <span class="comment">// print target hardware address</span>
00196     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"DstHwAddr   : "</span>);  <a class="code" href="group__net.html#ga4">netPrintEthAddr</a>(&amp;packet-&gt;dhwaddr);  <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>();
00197     <span class="comment">// print target protocol address</span>
00198     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"DstProtoAddr: "</span>);  <a class="code" href="group__net.html#ga5">netPrintIPAddr</a>(<a class="code" href="group__net.html#ga26">HTONL</a>(packet-&gt;dipaddr)); <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>();
00199 }
00200 
00201 
00202 <span class="keywordtype">void</span> <a class="code" href="group__arp.html#ga8">arpPrintTable</a>(<span class="keywordtype">void</span>)
00203 {
00204     uint8_t i;
00205 
00206     <span class="comment">// print ARP table</span>
00207     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"Time    Eth Address    IP Address\r\n"</span>);
00208     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"---------------------------------------\r\n"</span>);
00209     <span class="keywordflow">for</span>(i=0; i&lt;ARP_TABLE_SIZE; i++)
00210     {
00211         <a class="code" href="group__rprintf.html#ga7">rprintfu08</a>(ArpTable[i].time);
00212         <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"   "</span>);
00213         <a class="code" href="group__net.html#ga4">netPrintEthAddr</a>(&amp;ArpTable[i].ethaddr);
00214         <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"  "</span>);
00215         <a class="code" href="group__net.html#ga5">netPrintIPAddr</a>(ArpTable[i].ipaddr);
00216         <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>();
00217     }
00218 }
00219 <span class="preprocessor">#endif</span>
</pre></div><hr size="1"><address style="align: right;"><small>Generated on Mon Aug 22 04:29:27 2005 for Procyon AVRlib by&nbsp;
<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>