arp_8c-source.html

avr应用测试程序

00113             ArpTable[index].time = ARP_CACHE_TIME_TO_LIVE;
00114             <span class="comment">// and we're done</span>
00115             <span class="keywordflow">return</span>;
00116         }
00117     }
00118 
00119     <span class="comment">// no space in table, we give up</span>
00120 }
00121 
<a name="l00122"></a><a class="code" href="group__arp.html#ga4">00122</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)
00123 {
00124     <span class="keywordtype">int</span> index;
00125     <span class="comment">// check if destination is already present in arp table</span>
00126     <span class="comment">// use the physical dstIp if it's provided, otherwise the dstIp in packet</span>
00127     <span class="keywordflow">if</span>(phyDstIp)
00128         index = <a class="code" href="group__arp.html#ga6">arpMatchIp</a>(phyDstIp);
00129     <span class="keywordflow">else</span>
00130         index = <a class="code" href="group__arp.html#ga6">arpMatchIp</a>(<a class="code" href="group__net.html#ga34">HTONL</a>(packet-&gt;ip.destipaddr));
00131     <span class="comment">// fill in ethernet info</span>
00132     <span class="keywordflow">if</span>(index != -1)
00133     {
00134         <span class="comment">// ARP entry present, fill eth address(es)</span>
00135         packet-&gt;eth.src  = ArpMyAddr.ethaddr;
00136         packet-&gt;eth.dest = ArpTable[index].ethaddr;
00137         packet-&gt;eth.type = <a class="code" href="group__net.html#ga33">HTONS</a>(ETHTYPE_IP);
00138     }
00139     <span class="keywordflow">else</span>
00140     {
00141         <span class="comment">// not in table, must send ARP request</span>
00142         packet-&gt;eth.src = ArpMyAddr.ethaddr;
00143         <span class="comment">// MUST CHANGE, but for now, send this one broadcast</span>
00144         packet-&gt;eth.dest.addr[0] = 0xFF;
00145         packet-&gt;eth.dest.addr[1] = 0xFF;
00146         packet-&gt;eth.dest.addr[2] = 0xFF;
00147         packet-&gt;eth.dest.addr[3] = 0xFF;
00148         packet-&gt;eth.dest.addr[4] = 0xFF;
00149         packet-&gt;eth.dest.addr[5] = 0xFF;
00150         packet-&gt;eth.type = <a class="code" href="group__net.html#ga33">HTONS</a>(ETHTYPE_IP);
00151     }
00152 }
00153 
<a name="l00154"></a><a class="code" href="group__arp.html#ga5">00154</a> <span class="keywordtype">void</span> <a class="code" href="group__arp.html#ga5">arpTimer</a>(<span class="keywordtype">void</span>)
00155 {
00156     <span class="keywordtype">int</span> index;
00157     <span class="comment">// this function meant to be called on a regular time interval</span>
00158 
00159     <span class="comment">// decrement time-to-live for all entries</span>
00160     <span class="keywordflow">for</span>(index=0; index&lt;ARP_TABLE_SIZE; index++)
00161     {
00162         <span class="keywordflow">if</span>(ArpTable[index].time)
00163             ArpTable[index].time--;
00164     }
00165 }
00166 
<a name="l00167"></a><a class="code" href="group__arp.html#ga6">00167</a> <span class="keywordtype">int</span> <a class="code" href="group__arp.html#ga6">arpMatchIp</a>(uint32_t ipaddr)
00168 {
00169     uint8_t i;
00170 
00171     <span class="comment">// check if IP address is present in arp table</span>
00172     <span class="keywordflow">for</span>(i=0; i&lt;ARP_TABLE_SIZE; i++)
00173     {
00174         <span class="keywordflow">if</span>(ArpTable[i].ipaddr == ipaddr)
00175         {
00176             <span class="comment">// IP address found</span>
00177             <span class="keywordflow">return</span> i;
00178         }
00179     }
00180 
00181     <span class="comment">// no match</span>
00182     <span class="keywordflow">return</span> -1;
00183 }
00184 
00185 <span class="preprocessor">#ifdef ARP_DEBUG_PRINT</span>
00186 <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)
00187 {
00188     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"ARP Packet:\r\n"</span>);
00189     <span class="comment">//debugPrintHexTable(60, (unsigned char*)&amp;packet);</span>
00190     <span class="comment">// print operation type</span>
00191     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"Operation   : "</span>);
00192     <span class="keywordflow">if</span>(packet-&gt;opcode == <a class="code" href="group__net.html#ga2">htons</a>(ARP_OPCODE_REQUEST))
00193         <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"REQUEST"</span>);
00194     <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))
00195         <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"REPLY"</span>);
00196     <span class="keywordflow">else</span>
00197         <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"UNKNOWN"</span>);
00198     <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>();
00199     <span class="comment">// print source hardware address</span>
00200     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"SrcHwAddr   : "</span>);  <a class="code" href="group__net.html#ga5">netPrintEthAddr</a>(&amp;packet-&gt;shwaddr);  <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>();
00201     <span class="comment">// print source protocol address</span>
00202     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"SrcProtoAddr: "</span>);  <a class="code" href="group__net.html#ga6">netPrintIPAddr</a>(<a class="code" href="group__net.html#ga34">HTONL</a>(packet-&gt;sipaddr)); <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>();
00203     <span class="comment">// print target hardware address</span>
00204     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"DstHwAddr   : "</span>);  <a class="code" href="group__net.html#ga5">netPrintEthAddr</a>(&amp;packet-&gt;dhwaddr);  <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>();
00205     <span class="comment">// print target protocol address</span>
00206     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"DstProtoAddr: "</span>);  <a class="code" href="group__net.html#ga6">netPrintIPAddr</a>(<a class="code" href="group__net.html#ga34">HTONL</a>(packet-&gt;dipaddr)); <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>();
00207 }
00208 
00209 
00210 <span class="keywordtype">void</span> <a class="code" href="group__arp.html#ga8">arpPrintTable</a>(<span class="keywordtype">void</span>)
00211 {
00212     uint8_t i;
00213 
00214     <span class="comment">// print ARP table</span>
00215     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"Time    Eth Address    IP Address\r\n"</span>);
00216     <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"---------------------------------------\r\n"</span>);
00217     <span class="keywordflow">for</span>(i=0; i&lt;ARP_TABLE_SIZE; i++)
00218     {
00219         <a class="code" href="group__rprintf.html#ga7">rprintfu08</a>(ArpTable[i].time);
00220         <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"   "</span>);
00221         <a class="code" href="group__net.html#ga5">netPrintEthAddr</a>(&amp;ArpTable[i].ethaddr);
00222         <a class="code" href="group__rprintf.html#ga15">rprintfProgStrM</a>(<span class="stringliteral">"  "</span>);
00223         <a class="code" href="group__net.html#ga6">netPrintIPAddr</a>(ArpTable[i].ipaddr);
00224         <a class="code" href="group__rprintf.html#ga5">rprintfCRLF</a>();
00225     }
00226 }
00227 <span class="preprocessor">#endif</span>
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