a00201.html

uip-1.0,give everyone who want.

<a name="l00223"></a>00223 <span class="preprocessor"></span>
<a name="l00224"></a>00224 
<a name="l00225"></a>00225 <span class="comment">/* Macros. */</span>
<a name="l00226"></a><a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">00226</a> <span class="preprocessor">#define BUF ((struct uip_tcpip_hdr *)&amp;uip_buf[UIP_LLH_LEN])</span>
<a name="l00227"></a><a class="code" href="a00150.html#g96544dedc1cdc71ad2ad54bf1d5e5433">00227</a> <span class="preprocessor"></span><span class="preprocessor">#define FBUF ((struct uip_tcpip_hdr *)&amp;uip_reassbuf[0])</span>
<a name="l00228"></a><a class="code" href="a00150.html#g4309376690872fa4beb4f025f5cc199b">00228</a> <span class="preprocessor"></span><span class="preprocessor">#define ICMPBUF ((struct uip_icmpip_hdr *)&amp;uip_buf[UIP_LLH_LEN])</span>
<a name="l00229"></a><a class="code" href="a00150.html#gb9435261753469accec0c9bf8a5a2686">00229</a> <span class="preprocessor"></span><span class="preprocessor">#define UDPBUF ((struct uip_udpip_hdr *)&amp;uip_buf[UIP_LLH_LEN])</span>
<a name="l00230"></a>00230 <span class="preprocessor"></span>
<a name="l00231"></a>00231 
<a name="l00232"></a>00232 <span class="preprocessor">#if UIP_STATISTICS == 1</span>
<a name="l00233"></a>00233 <span class="preprocessor"></span><span class="keyword">struct </span><a class="code" href="a00093.html">uip_stats</a> <a class="code" href="a00150.html#g9ee50a40597e67fce96541ab56c3b712">uip_stat</a>;
<a name="l00234"></a>00234 <span class="preprocessor">#define UIP_STAT(s) s</span>
<a name="l00235"></a>00235 <span class="preprocessor"></span><span class="preprocessor">#else</span>
<a name="l00236"></a><a class="code" href="a00150.html#g9c0814ed491fa452ec97910c0728d410">00236</a> <span class="preprocessor"></span><span class="preprocessor">#define UIP_STAT(s)</span>
<a name="l00237"></a>00237 <span class="preprocessor"></span><span class="preprocessor">#endif </span><span class="comment">/* UIP_STATISTICS == 1 */</span>
<a name="l00238"></a>00238 
<a name="l00239"></a>00239 <span class="preprocessor">#if UIP_LOGGING == 1</span>
<a name="l00240"></a>00240 <span class="preprocessor"></span><span class="preprocessor">#include &lt;stdio.h&gt;</span>
<a name="l00241"></a>00241 <span class="keywordtype">void</span> <a class="code" href="a00153.html#gb58e1ceb7cb73ca2bcd73146b6c1b4e7">uip_log</a>(<span class="keywordtype">char</span> *msg);
<a name="l00242"></a>00242 <span class="preprocessor">#define UIP_LOG(m) uip_log(m)</span>
<a name="l00243"></a>00243 <span class="preprocessor"></span><span class="preprocessor">#else</span>
<a name="l00244"></a><a class="code" href="a00150.html#g013c3a06a8b58589a77f4a3442f89c2a">00244</a> <span class="preprocessor"></span><span class="preprocessor">#define UIP_LOG(m)</span>
<a name="l00245"></a>00245 <span class="preprocessor"></span><span class="preprocessor">#endif </span><span class="comment">/* UIP_LOGGING == 1 */</span>
<a name="l00246"></a>00246 
<a name="l00247"></a>00247 <span class="preprocessor">#if ! UIP_ARCH_ADD32</span>
<a name="l00248"></a>00248 <span class="preprocessor"></span><span class="keywordtype">void</span>
<a name="l00249"></a><a class="code" href="a00151.html#g6832e4d2d046536b6472f7ac92340f68">00249</a> <a class="code" href="a00150.html#g6832e4d2d046536b6472f7ac92340f68">uip_add32</a>(<a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *op32, <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> op16)
<a name="l00250"></a>00250 {
<a name="l00251"></a>00251   uip_acc32[3] = op32[3] + (op16 &amp; 0xff);
<a name="l00252"></a>00252   uip_acc32[2] = op32[2] + (op16 &gt;&gt; 8);
<a name="l00253"></a>00253   uip_acc32[1] = op32[1];
<a name="l00254"></a>00254   uip_acc32[0] = op32[0];
<a name="l00255"></a>00255   
<a name="l00256"></a>00256   <span class="keywordflow">if</span>(uip_acc32[2] &lt; (op16 &gt;&gt; 8)) {
<a name="l00257"></a>00257     ++uip_acc32[1];
<a name="l00258"></a>00258     <span class="keywordflow">if</span>(uip_acc32[1] == 0) {
<a name="l00259"></a>00259       ++uip_acc32[0];
<a name="l00260"></a>00260     }
<a name="l00261"></a>00261   }
<a name="l00262"></a>00262   
<a name="l00263"></a>00263   
<a name="l00264"></a>00264   <span class="keywordflow">if</span>(uip_acc32[3] &lt; (op16 &amp; 0xff)) {
<a name="l00265"></a>00265     ++uip_acc32[2];
<a name="l00266"></a>00266     <span class="keywordflow">if</span>(uip_acc32[2] == 0) {
<a name="l00267"></a>00267       ++uip_acc32[1];
<a name="l00268"></a>00268       <span class="keywordflow">if</span>(uip_acc32[1] == 0) {
<a name="l00269"></a>00269         ++uip_acc32[0];
<a name="l00270"></a>00270       }
<a name="l00271"></a>00271     }
<a name="l00272"></a>00272   }
<a name="l00273"></a>00273 }
<a name="l00274"></a>00274 
<a name="l00275"></a>00275 <span class="preprocessor">#endif </span><span class="comment">/* UIP_ARCH_ADD32 */</span>
<a name="l00276"></a>00276 
<a name="l00277"></a>00277 <span class="preprocessor">#if ! UIP_ARCH_CHKSUM</span>
<a name="l00278"></a>00278 <span class="preprocessor"></span><span class="comment">/*---------------------------------------------------------------------------*/</span>
<a name="l00279"></a>00279 <span class="keyword">static</span> <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a>
<a name="l00280"></a>00280 chksum(<a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> sum, <span class="keyword">const</span> <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *data, <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> len)
<a name="l00281"></a>00281 {
<a name="l00282"></a>00282   <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> t;
<a name="l00283"></a>00283   <span class="keyword">const</span> <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *dataptr;
<a name="l00284"></a>00284   <span class="keyword">const</span> <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *last_byte;
<a name="l00285"></a>00285 
<a name="l00286"></a>00286   dataptr = data;
<a name="l00287"></a>00287   last_byte = data + len - 1;
<a name="l00288"></a>00288   
<a name="l00289"></a>00289   <span class="keywordflow">while</span>(dataptr &lt; last_byte) {  <span class="comment">/* At least two more bytes */</span>
<a name="l00290"></a>00290     t = (dataptr[0] &lt;&lt; 8) + dataptr[1];
<a name="l00291"></a>00291     sum += t;
<a name="l00292"></a>00292     <span class="keywordflow">if</span>(sum &lt; t) {
<a name="l00293"></a>00293       sum++;            <span class="comment">/* carry */</span>
<a name="l00294"></a>00294     }
<a name="l00295"></a>00295     dataptr += 2;
<a name="l00296"></a>00296   }
<a name="l00297"></a>00297   
<a name="l00298"></a>00298   <span class="keywordflow">if</span>(dataptr == last_byte) {
<a name="l00299"></a>00299     t = (dataptr[0] &lt;&lt; 8) + 0;
<a name="l00300"></a>00300     sum += t;
<a name="l00301"></a>00301     <span class="keywordflow">if</span>(sum &lt; t) {
<a name="l00302"></a>00302       sum++;            <span class="comment">/* carry */</span>
<a name="l00303"></a>00303     }
<a name="l00304"></a>00304   }
<a name="l00305"></a>00305 
<a name="l00306"></a>00306   <span class="comment">/* Return sum in host byte order. */</span>
<a name="l00307"></a>00307   <span class="keywordflow">return</span> sum;
<a name="l00308"></a>00308 }
<a name="l00309"></a>00309 <span class="comment">/*---------------------------------------------------------------------------*/</span>
<a name="l00310"></a>00310 <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a>
<a name="l00311"></a><a class="code" href="a00150.html#gb6683dd83fe1c8de9a24086d4b69e907">00311</a> <a class="code" href="a00150.html#gb6683dd83fe1c8de9a24086d4b69e907">uip_chksum</a>(<a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> *data, <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> len)
<a name="l00312"></a>00312 {
<a name="l00313"></a>00313   <span class="keywordflow">return</span> <a class="code" href="a00148.html#ga22b04cac8cf283ca12f028578bebc06">htons</a>(chksum(0, (<a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *)data, len));
<a name="l00314"></a>00314 }
<a name="l00315"></a>00315 <span class="comment">/*---------------------------------------------------------------------------*/</span>
<a name="l00316"></a>00316 <span class="preprocessor">#ifndef UIP_ARCH_IPCHKSUM</span>
<a name="l00317"></a>00317 <span class="preprocessor"></span><a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a>
<a name="l00318"></a><a class="code" href="a00150.html#g2addf34c7d457c1a7899a7e2171ef1e9">00318</a> <a class="code" href="a00150.html#g2addf34c7d457c1a7899a7e2171ef1e9">uip_ipchksum</a>(<span class="keywordtype">void</span>)
<a name="l00319"></a>00319 {
<a name="l00320"></a>00320   <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> sum;
<a name="l00321"></a>00321 
<a name="l00322"></a>00322   sum = chksum(0, &amp;uip_buf[<a class="code" href="a00153.html#ge6f4a2453dbd8bc60e6a82774552366a">UIP_LLH_LEN</a>], <a class="code" href="a00150.html#g6bc12c6c7b56f73ce5d57abfdcdc6eb5">UIP_IPH_LEN</a>);
<a name="l00323"></a>00323   <a class="code" href="a00135.html#534d9e416324fb8ecca6b9cb4b1f6a6a">DEBUG_PRINTF</a>(<span class="stringliteral">"uip_ipchksum: sum 0x%04x\n"</span>, sum);
<a name="l00324"></a>00324   <span class="keywordflow">return</span> (sum == 0) ? 0xffff : <a class="code" href="a00148.html#ga22b04cac8cf283ca12f028578bebc06">htons</a>(sum);
<a name="l00325"></a>00325 }
<a name="l00326"></a>00326 <span class="preprocessor">#endif</span>
<a name="l00327"></a>00327 <span class="preprocessor"></span><span class="comment">/*---------------------------------------------------------------------------*/</span>
<a name="l00328"></a>00328 <span class="keyword">static</span> <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a>
<a name="l00329"></a>00329 upper_layer_chksum(<a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> proto)
<a name="l00330"></a>00330 {
<a name="l00331"></a>00331   <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> upper_layer_len;
<a name="l00332"></a>00332   <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> sum;
<a name="l00333"></a>00333   
<a name="l00334"></a>00334 <span class="preprocessor">#if UIP_CONF_IPV6</span>
<a name="l00335"></a>00335 <span class="preprocessor"></span>  upper_layer_len = (((<a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a>)(<a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">BUF</a>-&gt;len[0]) &lt;&lt; 8) + <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">BUF</a>-&gt;len[1]);
<a name="l00336"></a>00336 <span class="preprocessor">#else </span><span class="comment">/* UIP_CONF_IPV6 */</span>
<a name="l00337"></a>00337   upper_layer_len = (((<a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a>)(<a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">BUF</a>-&gt;len[0]) &lt;&lt; 8) + <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">BUF</a>-&gt;len[1]) - <a class="code" href="a00150.html#g6bc12c6c7b56f73ce5d57abfdcdc6eb5">UIP_IPH_LEN</a>;
<a name="l00338"></a>00338 <span class="preprocessor">#endif </span><span class="comment">/* UIP_CONF_IPV6 */</span>
<a name="l00339"></a>00339   
<a name="l00340"></a>00340   <span class="comment">/* First sum pseudoheader. */</span>
<a name="l00341"></a>00341   
<a name="l00342"></a>00342   <span class="comment">/* IP protocol and length fields. This addition cannot carry. */</span>
<a name="l00343"></a>00343   sum = upper_layer_len + proto;