tcp_8c-source.html

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

00906                                 
00907                                         <span class="keywordflow">if</span>(soc-&gt;<a class="code" href="structtcb.html#m1">type</a> &amp; <a class="code" href="tcp__ip_8h.html#a39">TCP_TYPE_SERVER</a> )
00908                                                 <a class="code" href="tcp_8c.html#a20">tcp_newstate</a>(soc, <a class="code" href="tcp__ip_8h.html#a45">TCP_STATE_LISTENING</a>);
00909                                         <span class="keywordflow">else</span>
00910                                                 <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>);
00911                                         
00912                                         handle++;
00913                 
00914                                         <span class="keywordflow">return</span>;                                                                         
00915                                 }
00916                                 
00917                                 soc-&gt;<a class="code" href="structtcb.html#m15">retries_left</a>--;
00918                                 <a class="code" href="timers_8c.html#a6">init_timer</a>(soc-&gt;<a class="code" href="structtcb.html#m14">retransmit_timerh</a>, <a class="code" href="group__opentcp__config.html#a11">TCP_DEF_RETRY_TOUT</a>*<a class="code" href="timers_8h.html#a1">TIMERTIC</a>);
00919                                                                 
00920                                 <span class="comment">/* Yep, there is unacked data                   */</span>
00921                                 <span class="comment">/* Application should send the old data */</span>
00922                                 
00923                                 <span class="keywordflow">if</span>(temp&gt;soc-&gt;<a class="code" href="structtcb.html#m9">send_mtu</a>)
00924                                         temp = soc-&gt;<a class="code" href="structtcb.html#m9">send_mtu</a>;
00925                                 
00926                                 <span class="comment">/* Rewind Send Next because the send process will adjust it                     */</span>
00927                                 <span class="comment">/* So cheat the tcp_send to think there is no unacked data                      */</span>
00928                                 
00929                                 soc-&gt;<a class="code" href="structtcb.html#m8">send_next</a> = soc-&gt;<a class="code" href="structtcb.html#m6">send_unacked</a>;
00930                                 
00931                                 <span class="comment">/* tcp_send will set the retiries_left to maximum but this is           */</span>
00932                                 <span class="comment">/* retransmitting already so we need to retain it in order to           */</span>
00933                                 <span class="comment">/* avoid dead-lock                                                                                                      */</span>
00934                                 
00935                                 old_retries = soc-&gt;<a class="code" href="structtcb.html#m15">retries_left</a>;
00936                                 
00937                                 temp = soc-&gt;<a class="code" href="structtcb.html#m16">event_listener</a>(handle, <a class="code" href="tcp__ip_8h.html#a59">TCP_EVENT_REGENERATE</a>, (UINT32)temp, 0);
00938                         
00939                                 soc-&gt;<a class="code" href="structtcb.html#m15">retries_left</a> = old_retries;
00940                         
00941                                 <span class="keywordflow">if</span>(temp &lt;= 0) {
00942                                         
00943                                         <span class="comment">/* No data by application, must be something wrong      */</span>
00944                                         soc-&gt;<a class="code" href="structtcb.html#m7">myflags</a> = TCP_FLAG_RESET;
00945                                         <a class="code" href="tcp_8c.html#a16">tcp_sendcontrol</a>(handle);
00946                                         
00947                                         <span class="comment">/* Inform application   */</span>
00948 
00949                                         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>);
00950                                                                         
00951                                         <span class="keywordflow">if</span>(soc-&gt;<a class="code" href="structtcb.html#m1">type</a> &amp; <a class="code" href="tcp__ip_8h.html#a39">TCP_TYPE_SERVER</a> )
00952                                                 <a class="code" href="tcp_8c.html#a20">tcp_newstate</a>(soc, <a class="code" href="tcp__ip_8h.html#a45">TCP_STATE_LISTENING</a>);
00953                                         <span class="keywordflow">else</span>
00954                                                 <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>);
00955                                         
00956                                         handle++;
00957                 
00958                                         <span class="keywordflow">return</span>;                                 
00959                                         
00960                                 }
00961                                 
00962                                 <span class="comment">/* Application has send data    */</span>
00963                                 
00964                                 handle++;
00965                 
00966                                 <span class="keywordflow">return</span>;
00967                                 
00968                         
00969                         <span class="keywordflow">case</span> <a class="code" href="tcp__ip_8h.html#a47">TCP_STATE_SYN_SENT</a>:
00970                         <span class="keywordflow">case</span> <a class="code" href="tcp__ip_8h.html#a46">TCP_STATE_SYN_RECEIVED</a>:
00971                         
00972                                 <span class="comment">/* Is there timeout?    */</span>
00973                                 <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 )
00974                                         <span class="keywordflow">break</span>;
00975                                         
00976                                 TCP_DEBUGOUT(<span class="stringliteral">"Timeout\r\n"</span>);
00977                                         
00978                                 <span class="comment">/* Yep, timeout. Is there reties left?  */</span>
00979                                 <span class="keywordflow">if</span>( soc-&gt;<a class="code" href="structtcb.html#m15">retries_left</a> ) {
00980                                         soc-&gt;<a class="code" href="structtcb.html#m15">retries_left</a>--;
00981                                         <span class="keywordflow">if</span>(soc-&gt;<a class="code" href="structtcb.html#m0">state</a> == <a class="code" href="tcp__ip_8h.html#a47">TCP_STATE_SYN_SENT</a>)
00982                                                 <a class="code" href="timers_8c.html#a6">init_timer</a>(soc-&gt;<a class="code" href="structtcb.html#m14">retransmit_timerh</a>, <a class="code" href="group__opentcp__config.html#a13">TCP_SYN_RETRY_TOUT</a>*<a class="code" href="timers_8h.html#a1">TIMERTIC</a>);
00983                                         <span class="keywordflow">else</span>
00984                                                 <a class="code" href="timers_8c.html#a6">init_timer</a>(soc-&gt;<a class="code" href="structtcb.html#m14">retransmit_timerh</a>, <a class="code" href="group__opentcp__config.html#a11">TCP_DEF_RETRY_TOUT</a>*<a class="code" href="timers_8h.html#a1">TIMERTIC</a>);
00985 
00986                                         <a class="code" href="tcp_8c.html#a16">tcp_sendcontrol</a>(handle);
00987                                         
00988                                         handle++;
00989                 
00990                                         <span class="keywordflow">return</span>;                         
00991                                 } <span class="keywordflow">else</span> {
00992                                         <span class="comment">/* Retries used up      */</span>
00993                                         TCP_DEBUGOUT(<span class="stringliteral">"Retries used up, resetting\r\n"</span>);
00994                                         
00995                                         <span class="keywordflow">if</span>(soc-&gt;<a class="code" href="structtcb.html#m1">type</a> &amp; <a class="code" href="tcp__ip_8h.html#a39">TCP_TYPE_SERVER</a> )
00996                                                 <a class="code" href="tcp_8c.html#a20">tcp_newstate</a>(soc, <a class="code" href="tcp__ip_8h.html#a45">TCP_STATE_LISTENING</a>);
00997                                         <span class="keywordflow">else</span>
00998                                                 <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>);
00999                                         
01000                                         soc-&gt;<a class="code" href="structtcb.html#m7">myflags</a> = TCP_FLAG_RESET;
01001                                         <a class="code" href="tcp_8c.html#a16">tcp_sendcontrol</a>(handle);
01002                                         
01003                                         <span class="comment">/* Inform application   */</span>
01004 
01005                                         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>);
01006                                         
01007                                         handle++;
01008                 
01009                                         <span class="keywordflow">return</span>;
01010                                 }
01011                                 
01012                                 <span class="keywordflow">break</span>;
01013                                 
01014                         <span class="keywordflow">case</span> <a class="code" href="tcp__ip_8h.html#a52">TCP_STATE_TIMED_WAIT</a>:
01015                                 
01016                                 <span class="comment">/* Is there timeout?    */</span>
01017                                 
01018                                 <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 )
01019                                         <span class="keywordflow">break</span>;
01020                                         
01021                                 TCP_DEBUGOUT(<span class="stringliteral">"Timeout\r\n"</span>);
01022                                 
01023                                 <span class="keywordflow">if</span>(soc-&gt;<a class="code" href="structtcb.html#m15">retries_left</a>) {
01024                                         soc-&gt;<a class="code" href="structtcb.html#m15">retries_left</a>--;
01025                                         <a class="code" href="timers_8c.html#a6">init_timer</a>(soc-&gt;<a class="code" href="structtcb.html#m14">retransmit_timerh</a>, <a class="code" href="group__opentcp__config.html#a11">TCP_DEF_RETRY_TOUT</a>*<a class="code" href="timers_8h.html#a1">TIMERTIC</a>);
01026                                         <span class="keywordflow">break</span>;
01027                                 }
01028                                 
01029                                 <span class="keywordflow">if</span>(soc-&gt;<a class="code" href="structtcb.html#m1">type</a> &amp; <a class="code" href="tcp__ip_8h.html#a39">TCP_TYPE_SERVER</a> )
01030                                         <a class="code" href="tcp_8c.html#a20">tcp_newstate</a>(soc, <a class="code" href="tcp__ip_8h.html#a45">TCP_STATE_LISTENING</a>);
01031                                 <span class="keywordflow">else</span>
01032                                         <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>);
01033                                         
01034                                 <span class="keywordflow">break</span>;
01035                         
01036                         <span class="keywordflow">case</span> <a class="code" href="tcp__ip_8h.html#a51">TCP_STATE_LAST_ACK</a>:
01037                         <span class="keywordflow">case</span> <a class="code" href="tcp__ip_8h.html#a48">TCP_STATE_FINW1</a>:
01038                         <span class="keywordflow">case</span> <a class="code" href="tcp__ip_8h.html#a50">TCP_STATE_CLOSING</a>:
01039                         
01040                                 <span class="comment">/* Is there timeout?    */</span>
01041                                 
01042                                 <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 )
01043                                         <span class="keywordflow">break</span>;
01044                                         
01045                                 TCP_DEBUGOUT(<span class="stringliteral">"Timeout\r\n"</span>);            
01046                                                 
01047                                 <span class="comment">/* Yep, timeout. Is there reties left?  */</span>
01048                                 
01049                                 <span class="keywordflow">if</span>( soc-&gt;<a class="code" href="structtcb.html#m15">retries_left</a> ) {
01050                                         soc-&gt;<a class="code" href="structtcb.html#m15">retries_left</a>--;
01051                                         <a class="code" href="timers_8c.html#a6">init_timer</a>(soc-&gt;<a class="code" href="structtcb.html#m14">retransmit_timerh</a>, <a class="code" href="group__opentcp__config.html#a11">TCP_DEF_RETRY_TOUT</a>*<a class="code" href="timers_8h.html#a1">TIMERTIC</a>);
01052                                         soc-&gt;<a class="code" href="structtcb.html#m7">myflags</a> = TCP_FLAG_FIN | TCP_FLAG_ACK;
01053                                         <a class="code" href="tcp_8c.html#a16">tcp_sendcontrol</a>(handle);
01054                                         
01055                                         handle++;
01056                 
01057 
01058                                         <span class="keywordflow">return</span>;                         
01059                                 } <span class="keywordflow">else</span> {
01060                                         <span class="comment">/* Retries used up      */</span>
01061                                         TCP_DEBUGOUT(<span class="stringliteral">"Retries used up, resetting\r\n"</span>);
01062                                         
01063                                         <span class="keywordflow">if</span>(soc-&gt;<a class="code" href="structtcb.html#m1">type</a> &amp; <a class="code" href="tcp__ip_8h.html#a39">TCP_TYPE_SERVER</a> )
01064                                                 <a class="code" href="tcp_8c.html#a20">tcp_newstate</a>(soc, <a class="code" href="tcp__ip_8h.html#a45">TCP_STATE_LISTENING</a>);
01065                                         <span class="keywordflow">else</span>
01066                                                 <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>);
01067                                         
01068                                         soc-&gt;<a class="code" href="structtcb.html#m7">myflags</a> = TCP_FLAG_RESET;
01069                                         <a class="code" href="tcp_8c.html#a16">tcp_sendcontrol</a>(handle);
01070                                         
01071