arp_8c-source.html

Freescale mcu OpenTCP-1.0.4.doc.html.zip 文档

00260         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>((UINT8)(localmachine.localHW[2]));
00261         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>((UINT8)(localmachine.localHW[1]));
00262         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>((UINT8)(localmachine.localHW[0]));
00263         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>((UINT8)(localmachine.localip&gt;&gt;24));
00264         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>((UINT8)(localmachine.localip&gt;&gt;16));
00265         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>((UINT8)(localmachine.localip&gt;&gt;8));
00266         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>((UINT8)(localmachine.localip));
00267         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>((UINT8)rem_hwadr[5]);
00268         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>((UINT8)rem_hwadr[4]);
00269         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>((UINT8)rem_hwadr[3]);
00270         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>((UINT8)rem_hwadr[2]);
00271         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>((UINT8)rem_hwadr[1]);
00272         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>((UINT8)rem_hwadr[0]);                                            
00273         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>((UINT8)(rem_ip&gt;&gt;24));
00274         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>((UINT8)(rem_ip&gt;&gt;16));
00275         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>((UINT8)(rem_ip&gt;&gt;8));
00276         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>((UINT8)rem_ip);
00277         
00278         <a class="code" href="system_8h.html#a16">NETWORK_COMPLETE_SEND</a>(0x0040);          <span class="comment">/* Send the packet      */</span>
00279         
00280         ARP_DEBUGOUT(<span class="stringliteral">"ARP Reply Sent..\n\r"</span>);
00281         
00282         <span class="comment">/* Add the Sender's info to cache because we can        */</span>
00283         
00284         <a class="code" href="arp_8c.html#a7">arp_add</a>(rem_ip, &amp;send_frame.destination[0], <a class="code" href="arp_8h.html#a17">ARP_TEMP_IP</a>);
00285         
00286         <span class="keywordflow">return</span>;
00287                 
00288 }
00289 
00290 
<a name="l00307"></a><a class="code" href="arp_8c.html#a4">00307</a> <span class="keywordtype">void</span> <a class="code" href="arp_8c.html#a4">arp_get_response</a>(<span class="keywordtype">void</span>)
00308 {
00309         <span class="keyword">struct </span><a class="code" href="structarp__entry.html">arp_entry</a> *qstruct;
00310         UINT8 rem_hwadr[<a class="code" href="arp_8h.html#a0">MAXHWALEN</a>];
00311         UINT32  rem_ip;
00312         UINT32  ltemp;
00313         INT8 i;
00314         UINT8 j;
00315         
00316         <span class="comment">/* Read Sender's HW address     */</span>
00317         
00318         <span class="keywordflow">for</span>( i=<a class="code" href="arp_8h.html#a0">MAXHWALEN</a>-1; i &gt;= 0; i-- )
00319                 rem_hwadr[i] = <a class="code" href="system_8h.html#a9">RECEIVE_NETWORK_B</a>();
00320                 
00321         <span class="comment">/* Read Sender's IP Address     */</span>
00322         
00323         <span class="keywordflow">for</span>( i=0; i&lt;<a class="code" href="arp_8h.html#a1">MAXPRALEN</a>; i++) {
00324                 rem_ip &lt;&lt;= 8;
00325                 rem_ip |= <a class="code" href="system_8h.html#a9">RECEIVE_NETWORK_B</a>();
00326         }
00327         
00328         
00329         <span class="comment">/* Skip our HW Address  */</span>
00330         
00331         <span class="keywordflow">for</span>(i=0; i&lt;<a class="code" href="arp_8h.html#a0">MAXHWALEN</a>; i++)
00332                 <a class="code" href="system_8h.html#a9">RECEIVE_NETWORK_B</a>();
00333         
00334         
00335         <span class="comment">/* Is The Packet For Us?        */</span>
00336         
00337         <span class="keywordflow">for</span>( i=0; i&lt;<a class="code" href="arp_8h.html#a1">MAXPRALEN</a>; i++)     {
00338                 ltemp &lt;&lt;= 8;
00339                 ltemp |= <a class="code" href="system_8h.html#a9">RECEIVE_NETWORK_B</a>();
00340         }
00341                 
00342         
00343         <span class="keywordflow">if</span>( ltemp != localmachine.localip ) 
00344                 <span class="keywordflow">return</span>;                                                         <span class="comment">/* No   */</span>
00345 
00346         ARP_DEBUGOUT(<span class="stringliteral">"Now entering to process ARP Reply..\n\r"</span>);
00347         
00348         <span class="comment">/* Are we waiting for that reply?       */</span>
00349         
00350         <span class="keywordflow">for</span>( i=1; i&lt;ARP_TSIZE; i++ ) {
00351                 qstruct = &amp;arp_table[i];
00352                 
00353                 <span class="keywordflow">if</span>( qstruct-&gt;<a class="code" href="structarp__entry.html#m0">state</a> == <a class="code" href="arp_8h.html#a11">ARP_FREE</a> )
00354                         <span class="keywordflow">continue</span>;
00355                 
00356                 <span class="keywordflow">if</span>( qstruct-&gt;<a class="code" href="structarp__entry.html#m0">state</a> == <a class="code" href="arp_8h.html#a12">ARP_RESERVED</a> )
00357                         <span class="keywordflow">continue</span>;                               
00358                 
00359                 <span class="keywordflow">if</span>( rem_ip == qstruct-&gt;<a class="code" href="structarp__entry.html#m5">pradr</a> ) {
00360                         <span class="comment">/* We are caching that IP, refresh it   */</span>
00361                         
00362                         ARP_DEBUGOUT(<span class="stringliteral">"Refreshing ARP cache from Reply..\n\r"</span>);
00363                         
00364                         <span class="keywordflow">for</span>( j=0; j&lt;<a class="code" href="arp_8h.html#a0">MAXHWALEN</a>; j++ )            
00365                                 qstruct-&gt;<a class="code" href="structarp__entry.html#m4">hwadr</a>[j] = rem_hwadr[j];
00366                                 
00367                         qstruct-&gt;<a class="code" href="structarp__entry.html#m3">ttl</a> = <a class="code" href="group__opentcp__config.html#a1">ARP_TIMEOUT</a>;
00368                         qstruct-&gt;<a class="code" href="structarp__entry.html#m2">retries</a> = <a class="code" href="group__opentcp__config.html#a3">ARP_MAXRETRY</a>;                                <span class="comment">/* No need for Retry    */</span>
00369                         qstruct-&gt;<a class="code" href="structarp__entry.html#m0">state</a> = <a class="code" href="arp_8h.html#a14">ARP_RESOLVED</a>;
00370                 
00371                         <span class="comment">/* Done */</span>
00372                         
00373                         <span class="keywordflow">break</span>;
00374                 }       
00375         
00376         }
00377 
00378 }
00379 
<a name="l00390"></a><a class="code" href="arp_8c.html#a5">00390</a> <span class="keywordtype">void</span> <a class="code" href="arp_8c.html#a5">arp_send_req</a> (UINT8 entry)
00391 {
00392 
00393         <span class="keyword">struct </span><a class="code" href="structarp__entry.html">arp_entry</a> *qstruct;
00394         UINT8 i;
00395         
00396         qstruct = &amp;arp_table[entry];
00397         
00398         <a class="code" href="system_8h.html#a17">NETWORK_SEND_INITIALIZE</a>(<a class="code" href="ethernet_8h.html#a35">ARP_BUFFER</a>);
00399         
00400         <span class="comment">/* Add datalink (Ethernet addresses) information        */</span>
00401         
00402         <span class="keywordflow">for</span>( i=0; i&lt;<a class="code" href="arp_8h.html#a0">MAXHWALEN</a>; i++) {
00403                 send_frame.destination[i] = 0xFF;
00404                 send_frame.source[i] = localmachine.localHW[i];
00405         }
00406         
00407         send_frame.protocol = <a class="code" href="ethernet_8h.html#a5">PROTOCOL_ARP</a>;
00408         
00409         <a class="code" href="system_8h.html#a18">NETWORK_ADD_DATALINK</a>(&amp;send_frame);
00410         
00411         <span class="comment">/* PUT ARP Data */</span>
00412 
00413         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>( (BYTE) (AR_HARDWARE&gt;&gt;8) );                      <span class="comment">/* Hardware Type        */</span>
00414         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>( (BYTE) AR_HARDWARE );
00415         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>(0x08);                                                           <span class="comment">/* Protocol Type        */</span>
00416         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>(0x00);
00417         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>(<a class="code" href="arp_8h.html#a0">MAXHWALEN</a>);                                                      <span class="comment">/* HW Adr Len           */</span>
00418         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>(<a class="code" href="arp_8h.html#a1">MAXPRALEN</a>);                                                      <span class="comment">/* Protocol Adr. Len*/</span>
00419         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>( (BYTE)(ARP_REQUEST&gt;&gt;8));                        <span class="comment">/* ARP Opcode           */</span>
00420         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>( (BYTE) ARP_REQUEST );
00421         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>((UINT8)localmachine.localHW[5]);         <span class="comment">/* Address fields       */</span>
00422         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>((UINT8)localmachine.localHW[4]);
00423         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>((UINT8)localmachine.localHW[3]);
00424         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>((UINT8)localmachine.localHW[2]);
00425         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>((UINT8)localmachine.localHW[1]);
00426         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>((UINT8)localmachine.localHW[0]);
00427         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>((UINT8)(localmachine.localip&gt;&gt;24));
00428         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>((UINT8)(localmachine.localip&gt;&gt;16));
00429         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>((UINT8)(localmachine.localip&gt;&gt;8));
00430         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>((UINT8)localmachine.localip);
00431         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>((UINT8)0xFF);
00432         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>((UINT8)0xFF);
00433         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>((UINT8)0xFF);
00434         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>((UINT8)0xFF);
00435         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>((UINT8)0xFF);
00436         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>((UINT8)0xFF);                                            
00437         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>((UINT8)(qstruct-&gt;<a class="code" href="structarp__entry.html#m5">pradr</a>&gt;&gt;24));
00438         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>((UINT8)(qstruct-&gt;<a class="code" href="structarp__entry.html#m5">pradr</a>&gt;&gt;16));
00439         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>((UINT8)(qstruct-&gt;<a class="code" href="structarp__entry.html#m5">pradr</a>&gt;&gt;8));
00440         <a class="code" href="system_8h.html#a11">SEND_NETWORK_B</a>((UINT8)qstruct-&gt;<a class="code" href="structarp__entry.html#m5">pradr</a>);
00441         
00442         
00443         <span class="comment">/* Packet assembled now, just send it ... */</span>
00444         
00445         <a class="code" href="system_8h.html#a16">NETWORK_COMPLETE_SEND</a>(0x0040);                                          <span class="comment">/* Min packet size      */</span>
00446  
00447         ARP_DEBUGOUT(<span class="stringliteral">"ARP Request Sent\n\r"</span>);
00448         
00449 }
00450 
00451 
<a name="l00466"></a><a class="code" href="arp_8c.html#a6">00466</a> INT8 <a class="code" href="arp_8c.html#a6">arp_alloc</a> (UINT8 type)
00467 {
00468         <span class="keyword">struct </span><a class="code" href="structarp__entry.html">arp_entry</a> *qstruct;
00469         INT8 i;
00470         <span class="keyword">static</span> BYTE aenext = 1;         <span class="comment">/* Cache Manager        */</span>
00471         INT16 found;
00472         
00473         <span class="comment">/* try to find free entry */</span>
00474         found=-1;
00475 
00476         <span class="keywordflow">for</span>( i=0; i&lt;ARP_TSIZE; i++ ) {
00477         
00478                 <span class="keywordflow">if</span>( arp_table[i].<a class="code" href="structarp__entry.html#m0">state</a> == <a class="code" href="arp_8h.html#a11">ARP_FREE</a> ) {
00479                         found=i;
00480                         <span class="keywordflow">break</span>;
00481                 }
00482         }
00483         
00484         <span class="keywordflow">if</span>(found != (-1) ) {
00485                 qstruct = &amp;arp_table[found];
00486                 qstruct-&gt;<a class="code" href="structarp__entry.html#m0">state</a> = <a class="code" href="arp_8h.html#a12">ARP_RESERVED</a>;
00487                 qstruct-&gt;<a class="code" href="structarp__entry.html#m1">type</a> = type;   
00488                 <span class="keywordflow">return</span>( (UINT8)found );
00489         }
00490 
00491 
00492         <span class="comment">/* if no success, try ro find first temporary entry     */</span>
00493         <span class="comment">/* on round-robin fashion                                                       */</span>
00494         
00495 
00496         <span class="keywordflow">for</span>( i=0; i&lt;ARP_TSIZE; i++ ) {  
00497                 <span class="keywordflow">if</span>( arp_table[aenext].<a class="code" href="structarp__entry.html#m1">type</a> == <a class="code" href="arp_8h.html#a17">ARP_TEMP_IP</a>) {
00498                         found = aenext;                 
00499                         <span class="keywordflow">break</span>;
00500                 }
00501