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

00498                 <span class="keywordflow">return</span>(-1);
00499         }
00500         
00501         soc = &amp;tcp_socket[sockethandle];                                <span class="comment">/* Get socket   */</span>
00502         
00503         <span class="keywordflow">if</span>(soc-&gt;<a class="code" href="structtcb.html#m0">state</a> != <a class="code" href="tcp__ip_8h.html#a53">TCP_STATE_CONNECTED</a>) {
00504                 TCP_DEBUGOUT(<span class="stringliteral">"TCP is not connected!!\r\n"</span>);
00505                 <span class="keywordflow">return</span>(-1);
00506         }
00507         
00508         <span class="keywordflow">if</span>(soc-&gt;<a class="code" href="structtcb.html#m6">send_unacked</a> != soc-&gt;<a class="code" href="structtcb.html#m8">send_next</a>) {
00509                 TCP_DEBUGOUT(<span class="stringliteral">"TCP contains unacked data, cannot send more\r\n"</span>);
00510                 <span class="keywordflow">return</span>(-1);
00511         }
00512         
00513         <span class="keywordflow">if</span>( dlen &gt; blen )
00514                 dlen = blen;
00515         
00516         <span class="keywordflow">if</span>(dlen + MIN_TCP_HLEN &gt; soc-&gt;<a class="code" href="structtcb.html#m9">send_mtu</a>) {
00517                 <span class="keywordflow">if</span>(soc-&gt;<a class="code" href="structtcb.html#m9">send_mtu</a> &gt; MIN_TCP_HLEN)
00518                         dlen = soc-&gt;<a class="code" href="structtcb.html#m9">send_mtu</a> - MIN_TCP_HLEN;
00519                 <span class="keywordflow">else</span>
00520                         <span class="keywordflow">return</span>(-1);
00521         }
00522         
00523         soc-&gt;<a class="code" href="structtcb.html#m8">send_next</a> += dlen;
00524         
00525         soc-&gt;<a class="code" href="structtcb.html#m7">myflags</a> = TCP_FLAG_ACK | TCP_FLAG_PUSH;
00526         <a class="code" href="tcp_8c.html#a15">process_tcp_out</a>(sockethandle, buf - MIN_TCP_HLEN, blen + MIN_TCP_HLEN + 1, dlen);
00527         
00528         <span class="keywordflow">return</span>(dlen);
00529 }
00530 
00531 
<a name="l00549"></a><a class="code" href="tcp_8c.html#a8">00549</a> INT8 <a class="code" href="tcp_8c.html#a8">tcp_close</a> (INT8 sochandle)
00550 {
00551         <span class="keyword">struct </span><a class="code" href="structtcb.html">tcb</a>* soc;
00552         
00553         TCP_DEBUGOUT(<span class="stringliteral">"FUNCTION: tcp_close\r\n"</span>);
00554 
00555         <span class="keywordflow">if</span>( NO_OF_TCPSOCKETS &lt; 0 )
00556                 <span class="keywordflow">return</span>(-1);
00557         
00558         <span class="keywordflow">if</span>( NO_OF_TCPSOCKETS == 0 )
00559                 <span class="keywordflow">return</span>(-1);
00560         
00561         <span class="keywordflow">if</span>( sochandle &gt; NO_OF_TCPSOCKETS ) {
00562                 TCP_DEBUGOUT(<span class="stringliteral">"Socket handle non-valid\r\n"</span>);
00563                 <span class="keywordflow">return</span>(-1);
00564         }
00565         
00566         <span class="keywordflow">if</span>( sochandle &lt; 0 ) {
00567                 TCP_DEBUGOUT(<span class="stringliteral">"Socket handle non-valid\r\n"</span>);
00568                 <span class="keywordflow">return</span>(-1);
00569         }
00570         
00571         soc = &amp;tcp_socket[sochandle];           <span class="comment">/* Get referense        */</span>      
00572         
00573         <span class="keywordflow">switch</span>(soc-&gt;<a class="code" href="structtcb.html#m0">state</a>) {
00574                 <span class="keywordflow">case</span> <a class="code" href="tcp__ip_8h.html#a45">TCP_STATE_LISTENING</a>:
00575                         <a class="code" href="tcp_8c.html#a20">tcp_newstate</a>(soc, <a class="code" href="tcp__ip_8h.html#a44">TCP_STATE_CLOSED</a>);
00576                         <span class="keywordflow">break</span>;
00577                 
00578                 <span class="keywordflow">case</span> <a class="code" href="tcp__ip_8h.html#a46">TCP_STATE_SYN_RECEIVED</a>:
00579                         soc-&gt;<a class="code" href="structtcb.html#m7">myflags</a> = TCP_FLAG_ACK | TCP_FLAG_FIN;
00580                         soc-&gt;<a class="code" href="structtcb.html#m6">send_unacked</a>++;
00581                         soc-&gt;<a class="code" href="structtcb.html#m8">send_next</a>++;
00582                         <a class="code" href="tcp_8c.html#a16">tcp_sendcontrol</a>(sochandle);
00583                         <a class="code" href="tcp_8c.html#a20">tcp_newstate</a>(soc, <a class="code" href="tcp__ip_8h.html#a48">TCP_STATE_FINW1</a>);
00584                         <span class="keywordflow">break</span>;
00585                 
00586                 <span class="keywordflow">case</span> <a class="code" href="tcp__ip_8h.html#a47">TCP_STATE_SYN_SENT</a>:
00587                 
00588                         <a class="code" href="tcp_8c.html#a20">tcp_newstate</a>(soc, <a class="code" href="tcp__ip_8h.html#a44">TCP_STATE_CLOSED</a>);
00589                 
00590                         <span class="keywordflow">break</span>;
00591                 
00592                 <span class="keywordflow">case</span> <a class="code" href="tcp__ip_8h.html#a48">TCP_STATE_FINW1</a>:
00593                 <span class="keywordflow">case</span> <a class="code" href="tcp__ip_8h.html#a49">TCP_STATE_FINW2</a>:
00594                 <span class="keywordflow">case</span> <a class="code" href="tcp__ip_8h.html#a50">TCP_STATE_CLOSING</a>:
00595                 <span class="keywordflow">case</span> <a class="code" href="tcp__ip_8h.html#a52">TCP_STATE_TIMED_WAIT</a>:
00596                 <span class="keywordflow">case</span> <a class="code" href="tcp__ip_8h.html#a51">TCP_STATE_LAST_ACK</a>:
00597                 
00598                         <span class="comment">/* We are closing already       */</span>
00599                         
00600                         <span class="keywordflow">break</span>;
00601                 
00602                 <span class="keywordflow">case</span> <a class="code" href="tcp__ip_8h.html#a53">TCP_STATE_CONNECTED</a>:
00603                 
00604                         <span class="comment">/* Is there unacked data?       */</span>
00605                         
00606                         <span class="keywordflow">if</span>(soc-&gt;<a class="code" href="structtcb.html#m6">send_unacked</a> == soc-&gt;<a class="code" href="structtcb.html#m8">send_next</a> ) {
00607                                 <span class="comment">/* There is no unacked data     */</span>
00608                                 
00609                                 soc-&gt;<a class="code" href="structtcb.html#m7">myflags</a> = TCP_FLAG_ACK | TCP_FLAG_FIN;
00610                                 soc-&gt;<a class="code" href="structtcb.html#m8">send_next</a>++;
00611                                 <a class="code" href="tcp_8c.html#a16">tcp_sendcontrol</a>(sochandle);
00612                                 <a class="code" href="tcp_8c.html#a20">tcp_newstate</a>(soc, <a class="code" href="tcp__ip_8h.html#a48">TCP_STATE_FINW1</a>);                             
00613                         } <span class="keywordflow">else</span> {
00614                                 <span class="comment">/* Can't do much but raise pollable flag to soc-&gt;flags          */</span>
00615                                 <span class="comment">/* and process it on tcp_poll                                                           */</span>
00616                                 
00617                                 soc-&gt;<a class="code" href="structtcb.html#m2">flags</a> |= TCP_INTFLAGS_CLOSEPENDING;
00618                                 
00619                                 
00620                                 <span class="keywordflow">return</span>(sochandle);
00621                         }
00622                 
00623                         <span class="keywordflow">break</span>;
00624         
00625                 <span class="keywordflow">default</span>:
00626                         <span class="keywordflow">return</span>(-1);
00627         }
00628         
00629         <span class="keywordflow">return</span>(sochandle);
00630 
00631 }
00632 
00633 
00634 
<a name="l00648"></a><a class="code" href="tcp_8c.html#a9">00648</a> INT8 <a class="code" href="tcp_8c.html#a9">tcp_getstate</a> (INT8 sochandle)
00649 {
00650         <span class="keyword">struct </span><a class="code" href="structtcb.html">tcb</a>* soc;
00651 
00652         <span class="keywordflow">if</span>( NO_OF_TCPSOCKETS &lt; 0 )
00653                 <span class="keywordflow">return</span>(-1);
00654         
00655         <span class="keywordflow">if</span>( NO_OF_TCPSOCKETS == 0 )
00656                 <span class="keywordflow">return</span>(-1);
00657         
00658         <span class="keywordflow">if</span>( sochandle &gt; NO_OF_TCPSOCKETS ) {
00659                 TCP_DEBUGOUT(<span class="stringliteral">"Socket handle non-valid\r\n"</span>);
00660                 <span class="keywordflow">return</span>(-1);
00661         }
00662         
00663         <span class="keywordflow">if</span>( sochandle &lt; 0 ) {
00664                 TCP_DEBUGOUT(<span class="stringliteral">"Socket handle non-valid\r\n"</span>);
00665                 <span class="keywordflow">return</span>(-1);
00666         }
00667         
00668         soc = &amp;tcp_socket[sochandle];           <span class="comment">/* Get referense        */</span>      
00669 
00670         <span class="keywordflow">return</span>(soc-&gt;<a class="code" href="structtcb.html#m0">state</a>);
00671 
00672 }
00673 
00674 
<a name="l00690"></a><a class="code" href="tcp_8c.html#a10">00690</a> INT16 <a class="code" href="tcp_8c.html#a10">tcp_checksend</a> (INT8 sochandle)
00691 {
00692         <span class="keyword">struct </span><a class="code" href="structtcb.html">tcb</a>* soc;
00693 
00694         <span class="keywordflow">if</span>( NO_OF_TCPSOCKETS &lt; 0 )
00695                 <span class="keywordflow">return</span>(-1);
00696         
00697         <span class="keywordflow">if</span>( NO_OF_TCPSOCKETS == 0 )
00698                 <span class="keywordflow">return</span>(-1);
00699         
00700         <span class="keywordflow">if</span>( sochandle &gt; NO_OF_TCPSOCKETS ) {
00701                 TCP_DEBUGOUT(<span class="stringliteral">"Socket handle non-valid\r\n"</span>);
00702                 <span class="keywordflow">return</span>(-1);
00703         }
00704         
00705         soc = &amp;tcp_socket[sochandle];           <span class="comment">/* Get referense        */</span>      
00706         
00707         <span class="keywordflow">if</span>(soc-&gt;<a class="code" href="structtcb.html#m0">state</a> != <a class="code" href="tcp__ip_8h.html#a53">TCP_STATE_CONNECTED</a>)
00708                 <span class="keywordflow">return</span>(-1);
00709