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00710         <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>)
00711                 <span class="keywordflow">return</span>(soc-&gt;<a class="code" href="structtcb.html#m9">send_mtu</a>);
00712         
00713         <span class="keywordflow">return</span>(-1);
00714 
00715 
00716 }
00717 
00718 
00719 
<a name="l00736"></a><a class="code" href="tcp_8c.html#a11">00736</a> INT8 <a class="code" href="tcp_8c.html#a11">tcp_abort</a> (INT8 sochandle)
00737 {
00738         <span class="keyword">struct </span><a class="code" href="structtcb.html">tcb</a>* soc;
00739         
00740         TCP_DEBUGOUT(<span class="stringliteral">"FUNCTION: tcp_abort\r\n"</span>);
00741 
00742         <span class="keywordflow">if</span>( NO_OF_TCPSOCKETS &lt; 0 )
00743                 <span class="keywordflow">return</span>(-1);
00744         
00745         <span class="keywordflow">if</span>( NO_OF_TCPSOCKETS == 0 )
00746                 <span class="keywordflow">return</span>(-1);
00747         
00748         <span class="keywordflow">if</span>( sochandle &gt; NO_OF_TCPSOCKETS ) {
00749                 TCP_DEBUGOUT(<span class="stringliteral">"Socket handle non-valid\r\n"</span>);
00750                 <span class="keywordflow">return</span>(-1);
00751         }
00752         
00753         <span class="keywordflow">if</span>( sochandle &lt; 0 ) {
00754                 TCP_DEBUGOUT(<span class="stringliteral">"Socket handle non-valid\r\n"</span>);
00755                 <span class="keywordflow">return</span>(-1);
00756         }
00757         
00758         soc = &amp;tcp_socket[sochandle];           <span class="comment">/* Get referense        */</span>      
00759 
00760         <span class="keywordflow">switch</span> (soc-&gt;<a class="code" href="structtcb.html#m0">state</a>)     {
00761                 <span class="keywordflow">case</span> <a class="code" href="tcp__ip_8h.html#a42">TCP_STATE_FREE</a>:
00762                         <span class="keywordflow">return</span>(-1);
00763                         
00764                 <span class="keywordflow">case</span> <a class="code" href="tcp__ip_8h.html#a43">TCP_STATE_RESERVED</a>:
00765                 <span class="keywordflow">case</span> <a class="code" href="tcp__ip_8h.html#a44">TCP_STATE_CLOSED</a>:
00766                         <span class="keywordflow">return</span>(sochandle);
00767                 
00768                 <span class="keywordflow">case</span> <a class="code" href="tcp__ip_8h.html#a52">TCP_STATE_TIMED_WAIT</a>:
00769                 <span class="keywordflow">case</span> <a class="code" href="tcp__ip_8h.html#a45">TCP_STATE_LISTENING</a>:
00770                         <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>);
00771                         <span class="keywordflow">return</span>(sochandle);
00772                 
00773                 <span class="keywordflow">case</span> <a class="code" href="tcp__ip_8h.html#a47">TCP_STATE_SYN_SENT</a>:
00774                 <span class="keywordflow">case</span> <a class="code" href="tcp__ip_8h.html#a46">TCP_STATE_SYN_RECEIVED</a>:
00775                 <span class="keywordflow">case</span> <a class="code" href="tcp__ip_8h.html#a53">TCP_STATE_CONNECTED</a>:
00776                 <span class="keywordflow">case</span> <a class="code" href="tcp__ip_8h.html#a48">TCP_STATE_FINW1</a>:
00777                 <span class="keywordflow">case</span> <a class="code" href="tcp__ip_8h.html#a49">TCP_STATE_FINW2</a>:
00778                 <span class="keywordflow">case</span> <a class="code" href="tcp__ip_8h.html#a50">TCP_STATE_CLOSING</a>:
00779                 <span class="keywordflow">case</span> <a class="code" href="tcp__ip_8h.html#a51">TCP_STATE_LAST_ACK</a>:
00780                 
00781                         soc-&gt;<a class="code" href="structtcb.html#m7">myflags</a> = TCP_FLAG_RESET;
00782                         <a class="code" href="tcp_8c.html#a16">tcp_sendcontrol</a>(sochandle);
00783                         <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>);
00784                         <span class="keywordflow">return</span>(sochandle);
00785                         
00786                 <span class="keywordflow">default</span>:
00787                         <span class="keywordflow">return</span>(-1);
00788         }
00789         
00790 
00791 }
00792 
00793 
00794 
<a name="l00808"></a><a class="code" href="tcp_8c.html#a12">00808</a> <span class="keywordtype">void</span> <a class="code" href="group__periodic__functions.html#a4">tcp_poll</a> (<span class="keywordtype">void</span>)
00809 {
00810         <span class="keyword">struct </span><a class="code" href="structtcb.html">tcb</a>* soc;
00811         <span class="keyword">static</span> UINT8 handle = 0;
00812         UINT8 i;
00813         INT32 temp;
00814         UINT8 old_retries;
00815         
00816         <span class="keywordflow">for</span>(i=0; i &lt; NO_OF_TCPSOCKETS; i++ ) {
00817                 
00818                 <span class="keywordflow">if</span>(handle &gt; NO_OF_TCPSOCKETS)
00819                         handle = 0;
00820 
00821                 soc = &amp;tcp_socket[handle];
00822                 
00823                 <span class="keywordflow">switch</span>(soc-&gt;<a class="code" href="structtcb.html#m0">state</a>) {
00824                         <span class="keywordflow">case</span> <a class="code" href="tcp__ip_8h.html#a42">TCP_STATE_FREE</a>:
00825                         <span class="keywordflow">case</span> <a class="code" href="tcp__ip_8h.html#a43">TCP_STATE_RESERVED</a>:
00826                         <span class="keywordflow">case</span> <a class="code" href="tcp__ip_8h.html#a44">TCP_STATE_CLOSED</a>:
00827                         <span class="keywordflow">case</span> <a class="code" href="tcp__ip_8h.html#a45">TCP_STATE_LISTENING</a>:
00828                                 
00829                                 <span class="keywordflow">break</span>;
00830                                 
00831                         <span class="keywordflow">case</span> <a class="code" href="tcp__ip_8h.html#a53">TCP_STATE_CONNECTED</a>:
00832                         
00833                                 <span class="comment">/* In CONNECTED State we have                                   */</span> 
00834                                 <span class="comment">/* something to do only if we have unacked data */</span>
00835                                 <span class="comment">/* or if connection has been IDLE too long or   */</span>
00836                                 <span class="comment">/* unserved close is isuued by user                             */</span>
00837                                 
00838                                 <span class="comment">/*if(soc-&gt;send_next &gt; soc-&gt;send_unacked)</span>
00839 <span class="comment">                                        temp = soc-&gt;send_next - soc-&gt;send_unacked;</span>
00840 <span class="comment">                                else</span>
00841 <span class="comment">                                        temp = soc-&gt;send_unacked - soc-&gt;send_next;</span>
00842 <span class="comment">                                */</span>
00843                                 
00844                                 temp = soc-&gt;<a class="code" href="structtcb.html#m8">send_next</a> - soc-&gt;<a class="code" href="structtcb.html#m6">send_unacked</a>;
00845                                 
00846                                 <span class="comment">/* Unserved Close?                      */</span>
00847                                 
00848                                 <span class="keywordflow">if</span>(soc-&gt;<a class="code" href="structtcb.html#m2">flags</a> &amp; TCP_INTFLAGS_CLOSEPENDING) {
00849                                         <span class="comment">/* Can we send the close now    */</span>
00850                                         
00851                                         <span class="keywordflow">if</span>(temp == 0) {
00852                                                 soc-&gt;<a class="code" href="structtcb.html#m7">myflags</a> = TCP_FLAG_ACK | TCP_FLAG_FIN;
00853                                                 soc-&gt;<a class="code" href="structtcb.html#m8">send_next</a>++;
00854                                                 <a class="code" href="tcp_8c.html#a16">tcp_sendcontrol</a>(handle);
00855                                                 <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>);     
00856                                                 soc-&gt;<a class="code" href="structtcb.html#m2">flags</a> ^= TCP_INTFLAGS_CLOSEPENDING;
00857                                                 
00858                                                 handle++;
00859                                                 
00860                                                 <span class="keywordflow">return</span>;         
00861                                                 
00862                                         }
00863                                 }
00864                                 
00865                                 <span class="comment">/* Socket timeout?                      */</span>
00866                                 
00867                                 <span class="keywordflow">if</span>(<a class="code" href="timers_8c.html#a7">check_timer</a>(soc-&gt;<a class="code" href="structtcb.html#m13">persist_timerh</a>) == 0) {
00868                                 
00869                                         soc-&gt;<a class="code" href="structtcb.html#m7">myflags</a> = TCP_FLAG_ACK | TCP_FLAG_FIN;
00870                                         soc-&gt;<a class="code" href="structtcb.html#m8">send_next</a>++;
00871                                         <a class="code" href="tcp_8c.html#a16">tcp_sendcontrol</a>(handle);
00872                                         <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>);     
00873                                         
00874                                         <span class="comment">/* Inform application   */</span>
00875                                         
00876                                         soc-&gt;<a class="code" href="structtcb.html#m16">event_listener</a>(handle, <a class="code" href="tcp__ip_8h.html#a56">TCP_EVENT_CLOSE</a>, soc-&gt;<a class="code" href="structtcb.html#m3">rem_ip</a>, soc-&gt;<a class="code" href="structtcb.html#m4">remport</a>);
00877                                         
00878                                         handle++;
00879                 
00880                                         <span class="keywordflow">return</span>;                 
00881                                 }       
00882                                 
00883                                 <span class="comment">/* Is there unacked data?       */</span>
00884                                 
00885                                 <span class="keywordflow">if</span>(temp == 0)
00886                                         <span class="keywordflow">break</span>;
00887                                 
00888                                 <span class="comment">/* Is there timeout?                                    */</span>
00889                                 
00890                                 <span class="keywordflow">if</span>( <a class="code" href="timers_8c.html#a7">check_timer</a>(soc-&gt;<a class="code" href="structtcb.html#m14">retransmit_timerh</a>) != 0 )
00891                                         <span class="keywordflow">break</span>;
00892                                 
00893                                 <span class="comment">/* De we have retries left                              */</span>
00894                                 
00895                                 <span class="keywordflow">if</span>(soc-&gt;<a class="code" href="structtcb.html#m15">retries_left</a> == 0) {
00896                                         <span class="comment">/* No retries, must reset       */</span>
00897                                         
00898                                         TCP_DEBUGOUT(<span class="stringliteral">"Retries used up, resetting\r\n"</span>);
00899                                         
00900                                         soc-&gt;<a class="code" href="structtcb.html#m7">myflags</a> = TCP_FLAG_RESET;
00901                                         <a class="code" href="tcp_8c.html#a16">tcp_sendcontrol</a>(handle);
00902                                         
00903                                         <span class="comment">/* Inform application   */</span>
00904 
00905                                         soc-&gt;<a class="code" href="structtcb.html#m16">event_listener</a>(handle, <a class="code" href="tcp__ip_8h.html#a57">TCP_EVENT_ABORT</a>, soc-&gt;<a class="code" href="structtcb.html#m3">rem_ip</a>, soc-&gt;<a class="code" href="structtcb.html#m4">remport</a>);