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00235         dlen -= 2;
00236         
00237         <span class="comment">/* Process it   */</span>
00238         
00239         <span class="keywordflow">switch</span>(opcode) {
00240                 <span class="keywordflow">case</span> TFTPS_OPCODE_WRQ:                                                  <span class="comment">/* Write request?       */</span>
00241                 
00242                         <span class="comment">/* Get filename */</span> 
00243                         
00244                         fname[0] = <span class="charliteral">'\0'</span>;
00245                         
00246                         <span class="keywordflow">for</span>(i=0; i&lt;dlen; i++) {
00247                                 <span class="keywordflow">if</span>(i &gt;= <a class="code" href="tftps_8h.html#a1">TFTPS_FILENAME_MAXLEN</a>) {
00248                                         tftps_senderror(TFTPS_NOTDEFINED);
00249                                         tftps_deletesocket();
00250                                         <span class="keywordflow">return</span>(1);
00251                                 }
00252                                 
00253                                 ch = <a class="code" href="system_8h.html#a9">RECEIVE_NETWORK_B</a>();
00254                                 
00255                                 fname[i] = ch;
00256                                 
00257                                 <span class="keywordflow">if</span>(ch == <span class="charliteral">'\0'</span>) {
00258                                         i++;
00259                                         <span class="keywordflow">break</span>;
00260                                 }
00261                         }
00262                         
00263                         dlen -= i;
00264                         <span class="comment">/* !!!!!!!!!!!!!!!!!!!!!!!!     */</span>
00265                         <span class="comment">/* Check here the filename      */</span>
00266                         <span class="comment">/* if NOT OK, RETURN            */</span>
00267                         <span class="comment">/* !!!!!!!!!!!!!!!!!!!!!!!! */</span>
00268                         
00269                         <span class="comment">/* Check mode, only octet mode is supported     */</span>
00270                         
00271                         <span class="keywordflow">if</span>(dlen &lt; 6) {
00272                                 tftps_senderror(TFTPS_NOTDEFINED);
00273                                 tftps_deletesocket();                   
00274                                 <span class="keywordflow">return</span>(1);
00275                         }
00276                         
00277                         <span class="keywordflow">if</span>( (<a class="code" href="system_8h.html#a9">RECEIVE_NETWORK_B</a>() != <span class="charliteral">'o'</span>) || (<a class="code" href="system_8h.html#a9">RECEIVE_NETWORK_B</a>() != <span class="charliteral">'c'</span>) || (<a class="code" href="system_8h.html#a9">RECEIVE_NETWORK_B</a>() != <span class="charliteral">'t'</span>) ||
00278                                 (<a class="code" href="system_8h.html#a9">RECEIVE_NETWORK_B</a>() != <span class="charliteral">'e'</span>) || (<a class="code" href="system_8h.html#a9">RECEIVE_NETWORK_B</a>() != <span class="charliteral">'t'</span>) || (<a class="code" href="system_8h.html#a9">RECEIVE_NETWORK_B</a>() != <span class="charliteral">'\0'</span>)   ) {
00279                                 tftps_senderror(TFTPS_NOTDEFINED);
00280                                 tftps_deletesocket();
00281                                 <span class="keywordflow">return</span>(1);
00282                         }
00283                         
00284                         <span class="comment">/* All OK, send ACK     */</span>
00285                         
00286                         <a class="code" href="tftps_8c.html#a18">tftps</a>.state = TFTPS_STATE_CONNECTED;
00287                         <a class="code" href="tftps_8c.html#a18">tftps</a>.blocknumber = 0;
00288                         <a class="code" href="tftps_8c.html#a18">tftps</a>.bytecount = 0;
00289                         <a class="code" href="tftps_8c.html#a18">tftps</a>.retries = <a class="code" href="tftps_8h.html#a2">TFTPS_DEF_RETRIES</a>;
00290                         <a class="code" href="timers_8c.html#a6">init_timer</a>(<a class="code" href="tftps_8c.html#a18">tftps</a>.tmrhandle, <a class="code" href="tftps_8h.html#a3">TFTPS_TIMEOUT</a>*<a class="code" href="timers_8h.html#a1">TIMERTIC</a>);
00291                                         
00292                         tftps_sendack();
00293                                         
00294                         <a class="code" href="tftps_8c.html#a18">tftps</a>.blocknumber++;
00295                                         
00296                         <span class="keywordflow">return</span>(1);                      
00297                         
00298                 
00299                 <span class="keywordflow">case</span> TFTPS_OPCODE_DATA:                                                                                 <span class="comment">/* Data Packet ? */</span>
00300                 
00301                         <span class="keywordflow">if</span>(<a class="code" href="tftps_8c.html#a18">tftps</a>.state != TFTPS_STATE_CONNECTED) {
00302                                 tftps_senderror(TFTPS_NOTDEFINED);
00303                                 tftps_deletesocket();
00304                                 <span class="keywordflow">return</span>(1);
00305                         }               
00306                         
00307                         <span class="keywordflow">if</span>(dlen &lt; 2) {
00308                                 tftps_senderror(TFTPS_NOTDEFINED);
00309                                 tftps_deletesocket();                   
00310                                 <span class="keywordflow">return</span>(1);
00311                         }                               
00312         
00313                         <span class="comment">/* Get block number     */</span>
00314                         
00315                         u16temp = <a class="code" href="system_8h.html#a9">RECEIVE_NETWORK_B</a>();
00316                         u16temp &lt;&lt;= 8;
00317                         u16temp |= <a class="code" href="system_8h.html#a9">RECEIVE_NETWORK_B</a>();
00318         
00319                         dlen -= 2;      
00320                         
00321                         <span class="keywordflow">if</span>( (u16temp &lt; <a class="code" href="tftps_8c.html#a18">tftps</a>.blocknumber) &amp;&amp; (<a class="code" href="tftps_8c.html#a18">tftps</a>.blocknumber &gt; 0) ) {
00322                                 <span class="comment">/* Duplicate msg, send ACK again        */</span>
00323                         
00324                                 <span class="keywordflow">if</span>( <a class="code" href="tftps_8c.html#a18">tftps</a>.retries &gt; 0 ) {
00325                                         <a class="code" href="tftps_8c.html#a18">tftps</a>.retries--;
00326                                         <a class="code" href="tftps_8c.html#a18">tftps</a>.blocknumber--;
00327                                         tftps_sendack();
00328                                         <a class="code" href="tftps_8c.html#a18">tftps</a>.blocknumber++;
00329                                 } <span class="keywordflow">else</span> {
00330                                         tftps_senderror(TFTPS_NOTDEFINED);
00331                                         tftps_deletesocket();
00332                                 }
00333                 
00334                                 <span class="keywordflow">return</span>(1);              
00335                         }
00336                 
00337                         <span class="keywordflow">if</span>( u16temp != <a class="code" href="tftps_8c.html#a18">tftps</a>.blocknumber ) {
00338                                 <span class="comment">/* Something really wrong */</span>
00339                 
00340                                 tftps_senderror(TFTPS_NOTDEFINED);
00341                                 tftps_deletesocket();
00342                                 <span class="keywordflow">return</span>(1);
00343                         }                                       
00344                         
00345                         <span class="comment">/* !!!!!!!!!!!!!!!!!!!!!!!!     */</span>
00346                         <span class="comment">/* Read the data here           */</span>
00347                         <span class="comment">/* !!!!!!!!!!!!!!!!!!!!!!!!     */</span>
00348                         
00349                         <span class="keywordflow">if</span>( dlen &lt; 512 ) {
00350                                 <span class="comment">/* Other side Wants to close */</span>
00351                         
00352                                 tftps_sendack();
00353                                 tftps_deletesocket();
00354                                 <span class="keywordflow">return</span>(1);
00355                         }                       
00356                         
00357                         <span class="comment">/* All OK       */</span>
00358                         
00359                         <a class="code" href="tftps_8c.html#a18">tftps</a>.retries = <a class="code" href="tftps_8h.html#a2">TFTPS_DEF_RETRIES</a>;
00360                         <a class="code" href="timers_8c.html#a6">init_timer</a>(<a class="code" href="tftps_8c.html#a18">tftps</a>.tmrhandle, <a class="code" href="tftps_8h.html#a3">TFTPS_TIMEOUT</a>*<a class="code" href="timers_8h.html#a1">TIMERTIC</a>);
00361                         tftps_sendack();
00362                         <a class="code" href="tftps_8c.html#a18">tftps</a>.blocknumber++;                    
00363         
00364                         <span class="keywordflow">return</span>(1);
00365                         
00366                 <span class="keywordflow">case</span> TFTPS_OPCODE_ERROR:
00367                 
00368                         tftps_deletesocket();
00369         
00370                         <span class="keywordflow">return</span>(1);
00371         
00372                 <span class="keywordflow">default</span>:
00373                 
00374                         <span class="comment">/* Unsupported Opcode, Send error */</span>
00375                 
00376                         tftps_senderror(TFTPS_ILLEGALOPERATION);
00377                         tftps_deletesocket();                   
00378         
00379                         <span class="keywordflow">return</span>(1);
00380         }       
00381                 
00382 }
00383 
00384 
00385 <span class="keywordtype">void</span> tftps_sendack (<span class="keywordtype">void</span>)
00386 {
00387         <span class="comment">/* Send a TFTP ACK packet */</span>
00388         
00389         net_buf[<a class="code" href="tcp__ip_8h.html#a62">UDP_APP_OFFSET</a> + 0] = 0;                <span class="comment">/* Opcode       */</span>
00390         net_buf[<a class="code" href="tcp__ip_8h.html#a62">UDP_APP_OFFSET</a> + 1] = 4;
00391         net_buf[<a class="code" href="tcp__ip_8h.html#a62">UDP_APP_OFFSET</a> + 2] = (UINT8)(<a class="code" href="tftps_8c.html#a18">tftps</a>.blocknumber &gt;&gt; 8);
00392         net_buf[<a class="code" href="tcp__ip_8h.html#a62">UDP_APP_OFFSET</a> + 3] = (UINT8)<a class="code" href="tftps_8c.html#a18">tftps</a>.blocknumber;
00393         
00394         <a class="code" href="udp_8c.html#a7">udp_send</a>(<a class="code" href="tftps_8c.html#a18">tftps</a>.sochandle, <a class="code" href="tftps_8c.html#a18">tftps</a>.remip, <a class="code" href="tftps_8c.html#a18">tftps</a>.remport, &amp;net_buf[<a class="code" href="tcp__ip_8h.html#a62">UDP_APP_OFFSET</a>], <a class="code" href="group__opentcp__config.html#a4">NETWORK_TX_BUFFER_SIZE</a> - <a class="code" href="tcp__ip_8h.html#a62">UDP_APP_OFFSET</a>, 4);
00395         
00396 
00397 }
00398 
00399 
00400 
00401 
00402 <span class="keywordtype">void</span> tftps_senderror (UINT8 errno )
00403 {
00404         <span class="comment">/* Send TFTP Error -packet */</span>
00405         
00406         net_buf[<a class="code" href="tcp__ip_8h.html#a62">UDP_APP_OFFSET</a> + 0] = 0;                <span class="comment">/* Opcode       */</span>
00407         net_buf[<a class="code" href="tcp__ip_8h.html#a62">UDP_APP_OFFSET</a> + 1] = 5;
00408         net_buf[<a class="code" href="tcp__ip_8h.html#a62">UDP_APP_OFFSET</a> + 2] = (UINT8)(<a class="code" href="tftps_8c.html#a18">tftps</a>.blocknumber &gt;&gt; 8);
00409         net_buf[<a class="code" href="tcp__ip_8h.html#a62">UDP_APP_OFFSET</a> + 3] = (UINT8)<a class="code" href="tftps_8c.html#a18">tftps</a>.blocknumber;
00410         net_buf[<a class="code" href="tcp__ip_8h.html#a62">UDP_APP_OFFSET</a> + 4] = errno;
00411         net_buf[<a class="code" href="tcp__ip_8h.html#a62">UDP_APP_OFFSET</a> + 5] = <span class="charliteral">'\0'</span>;
00412         net_buf[<a class="code" href="tcp__ip_8h.html#a62">UDP_APP_OFFSET</a> + 6] = 0;
00413         
00414         <a class="code" href="udp_8c.html#a7">udp_send</a>(<a class="code" href="tftps_8c.html#a18">tftps</a>.sochandle, <a class="code" href="tftps_8c.html#a18">tftps</a>.remip, <a class="code" href="tftps_8c.html#a18">tftps</a>.remport, &amp;net_buf[<a class="code" href="tcp__ip_8h.html#a62">UDP_APP_OFFSET</a>], <a class="code" href="group__opentcp__config.html#a4">NETWORK_TX_BUFFER_SIZE</a> - <a class="code" href="tcp__ip_8h.html#a62">UDP_APP_OFFSET</a>, 7);    
00415         
00416 }
00417 
00418 <span class="keywordtype">void</span> tftps_deletesocket (<span class="keywordtype">void</span>)
00419 {
00420         <span class="comment">/* Clear Socket Data */</span>
00421 
00422         <a class="code" href="tftps_8c.html#a18">tftps</a>.blocknumber = 0;
00423         <a class="code" href="tftps_8c.html#a18">tftps</a>.state = TFTPS_STATE_ENABLED;
00424         <a class="code" href="tftps_8c.html#a18">tftps</a>.retries = 0;
00425         <a class="code" href="tftps_8c.html#a18">tftps</a>.remip = 0;
00426         <a class="code" href="tftps_8c.html#a18">tftps</a>.remport = 0;      
00427 
00428 
00429 }
00430 
00431 
00432 
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