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10 <li><a href="main.html"><span>Main Page</span></a></li>
11 <li><a href="modules.html"><span>Modules</span></a></li>
12 <li><a href="classes.html"><span>Data Structures</span></a></li>
13 <li id="current"><a href="files.html"><span>Files</span></a></li>
14 <li><a href="examples.html"><span>Examples</span></a></li>
18 <li><a href="files.html"><span>File List</span></a></li>
19 <li><a href="globals.html"><span>Globals</span></a></li>
21 …a href="a00135.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fr…
22 <a name="l00002"></a>00002 <span class="comment"></span>
23 <a name="l00003"></a>00003 <span class="comment">/**</span>
24 <a name="l00004"></a>00004 <span class="comment"> * \defgroup uip The uIP TCP/IP stack</span>
25 <a name="l00005"></a>00005 <span class="comment"> * @{</span>
26 <a name="l00006"></a>00006 <span class="comment"> *</span>
27 <a name="l00007"></a>00007 <span class="comment"> * uIP is an implementation of the TCP/IP protocol…
28 <a name="l00008"></a>00008 <span class="comment"> * small 8-bit and 16-bit microcontrollers.</span>
29 <a name="l00009"></a>00009 <span class="comment"> *</span>
30 <a name="l00010"></a>00010 <span class="comment"> * uIP provides the necessary protocols for Intern…
31 <a name="l00011"></a>00011 <span class="comment"> * with a very small code footprint and RAM requir…
32 <a name="l00012"></a>00012 <span class="comment"> * code size is on the order of a few kilobytes an…
33 <a name="l00013"></a>00013 <span class="comment"> * the order of a few hundred bytes.</span>
34 <a name="l00014"></a>00014 <span class="comment"> */</span>
35 <a name="l00015"></a>00015 <span class="comment"></span>
36 <a name="l00016"></a>00016 <span class="comment">/**</span>
37 <a name="l00017"></a>00017 <span class="comment"> * \file</span>
38 <a name="l00018"></a>00018 <span class="comment"> * The uIP TCP/IP stack code.</span>
39 <a name="l00019"></a>00019 <span class="comment"> * \author Adam Dunkels <[email protected]></…
40 <a name="l00020"></a>00020 <span class="comment"> */</span>
41 <a name="l00021"></a>00021
42 <a name="l00022"></a>00022 <span class="comment">/*</span>
43 <a name="l00023"></a>00023 <span class="comment"> * Copyright (c) 2001-2003, Adam Dunkels.</span>
44 <a name="l00024"></a>00024 <span class="comment"> * All rights reserved.</span>
45 <a name="l00025"></a>00025 <span class="comment"> *</span>
46 <a name="l00026"></a>00026 <span class="comment"> * Redistribution and use in source and binary for…
47 <a name="l00027"></a>00027 <span class="comment"> * modification, are permitted provided that the f…
48 <a name="l00028"></a>00028 <span class="comment"> * are met:</span>
49 <a name="l00029"></a>00029 <span class="comment"> * 1. Redistributions of source code must retain t…
50 <a name="l00030"></a>00030 <span class="comment"> * notice, this list of conditions and the foll…
51 <a name="l00031"></a>00031 <span class="comment"> * 2. Redistributions in binary form must reproduc…
52 <a name="l00032"></a>00032 <span class="comment"> * notice, this list of conditions and the foll…
53 <a name="l00033"></a>00033 <span class="comment"> * documentation and/or other materials provide…
54 <a name="l00034"></a>00034 <span class="comment"> * 3. The name of the author may not be used to en…
55 <a name="l00035"></a>00035 <span class="comment"> * products derived from this software without …
56 <a name="l00036"></a>00036 <span class="comment"> * written permission.</span>
57 <a name="l00037"></a>00037 <span class="comment"> *</span>
58 <a name="l00038"></a>00038 <span class="comment"> * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS…
59 <a name="l00039"></a>00039 <span class="comment"> * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMIT…
60 <a name="l00040"></a>00040 <span class="comment"> * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A…
61 <a name="l00041"></a>00041 <span class="comment"> * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR B…
62 <a name="l00042"></a>00042 <span class="comment"> * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLAR…
63 <a name="l00043"></a>00043 <span class="comment"> * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCURE…
64 <a name="l00044"></a>00044 <span class="comment"> * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFIT…
65 <a name="l00045"></a>00045 <span class="comment"> * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY …
66 <a name="l00046"></a>00046 <span class="comment"> * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT …
67 <a name="l00047"></a>00047 <span class="comment"> * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT…
68 <a name="l00048"></a>00048 <span class="comment"> * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF…
69 <a name="l00049"></a>00049 <span class="comment"> *</span>
70 <a name="l00050"></a>00050 <span class="comment"> * This file is part of the uIP TCP/IP stack.</spa…
71 <a name="l00051"></a>00051 <span class="comment"> *</span>
72 <a name="l00052"></a>00052 <span class="comment"> * $Id: uip.c,v 1.65 2006/06/11 21:46:39 adam Exp …
73 <a name="l00053"></a>00053 <span class="comment"> *</span>
74 <a name="l00054"></a>00054 <span class="comment"> */</span>
75 <a name="l00055"></a>00055
76 <a name="l00056"></a>00056 <span class="comment">/*</span>
77 <a name="l00057"></a>00057 <span class="comment"> * uIP is a small implementation of the IP, UDP an…
78 <a name="l00058"></a>00058 <span class="comment"> * well as some basic ICMP stuff). The implementat…
79 <a name="l00059"></a>00059 <span class="comment"> * UDP, TCP and the application layers very tightl…
80 <a name="l00060"></a>00060 <span class="comment"> * of the compiled code down, this code frequently…
81 <a name="l00061"></a>00061 <span class="comment"> * statement. While it would be possible to break …
82 <a name="l00062"></a>00062 <span class="comment"> * function into many smaller functions, this woul…
83 <a name="l00063"></a>00063 <span class="comment"> * size because of the overhead of parameter passi…
84 <a name="l00064"></a>00064 <span class="comment"> * the optimier would not be as efficient.</span>
85 <a name="l00065"></a>00065 <span class="comment"> *</span>
86 <a name="l00066"></a>00066 <span class="comment"> * The principle is that we have a small buffer, c…
87 <a name="l00067"></a>00067 <span class="comment"> * in which the device driver puts an incoming pac…
88 <a name="l00068"></a>00068 <span class="comment"> * stack parses the headers in the packet, and cal…
89 <a name="l00069"></a>00069 <span class="comment"> * application. If the remote host has sent data t…
90 <a name="l00070"></a>00070 <span class="comment"> * this data is present in the uip_buf and the app…
91 <a name="l00071"></a>00071 <span class="comment"> * data from there. It is up to the application to…
92 <a name="l00072"></a>00072 <span class="comment"> * a byte stream if needed. The application will n…
93 <a name="l00073"></a>00073 <span class="comment"> * that is out of sequence.</span>
94 <a name="l00074"></a>00074 <span class="comment"> *</span>
95 <a name="l00075"></a>00075 <span class="comment"> * If the application whishes to send data to the …
96 <a name="l00076"></a>00076 <span class="comment"> * its data into the uip_buf. The uip_appdata poin…
97 <a name="l00077"></a>00077 <span class="comment"> * first available byte. The TCP/IP stack will cal…
98 <a name="l00078"></a>00078 <span class="comment"> * checksums, and fill in the necessary header fie…
99 <a name="l00079"></a>00079 <span class="comment"> * the packet back to the peer.</span>
100 <a name="l00080"></a>00080 <span class="comment">*/</span>
101 <a name="l00081"></a>00081
102 <a name="l00082"></a>00082 <span class="preprocessor">#include "<a class="code" href="a00136.html">…
103 <a name="l00083"></a>00083 <span class="preprocessor">#include "<a class="code" href="a00140.html">…
104 <a name="l00084"></a>00084 <span class="preprocessor">#include "<a class="code" href="a00137.html">…
105 <a name="l00085"></a>00085
106 <a name="l00086"></a>00086 <span class="preprocessor">#if UIP_CONF_IPV6</span>
107 <a name="l00087"></a>00087 <span class="preprocessor"></span><span class="preprocessor">#include "<…
108 <a name="l00088"></a>00088 <span class="preprocessor">#endif </span><span class="comment">/* UIP_CO…
109 <a name="l00089"></a>00089
110 <a name="l00090"></a>00090 <span class="preprocessor">#include <string.h></span>
111 <a name="l00091"></a>00091
112 <a name="l00092"></a>00092 <span class="comment">/*------------------------------------------------…
113 <a name="l00093"></a>00093 <span class="comment">/* Variable definitions. */</span>
114 <a name="l00094"></a>00094
115 <a name="l00095"></a>00095
116 <a name="l00096"></a>00096 <span class="comment">/* The IP address of this host. If it is defined t…
117 <a name="l00097"></a>00097 <span class="comment"> setting UIP_FIXEDADDR to 1 in uipopt.h), the ad…
118 <a name="l00098"></a>00098 <span class="comment"> here. Otherwise, the address */</span>
119 <a name="l00099"></a>00099 <span class="preprocessor">#if UIP_FIXEDADDR > 0</span>
120 …a name="l00100"></a>00100 <span class="preprocessor"></span><span class="keyword">const</span> <a …
121 <a name="l00101"></a>00101 {<a class="code" href="a00148.html#g69a7a4951ff21b302267532c21ee78fc">…
122 <a name="l00102"></a>00102 <a class="code" href="a00148.html#g69a7a4951ff21b302267532c21ee78fc">…
123 …a name="l00103"></a>00103 <span class="keyword">const</span> <a class="code" href="a00150.html#g1e…
124 <a name="l00104"></a>00104 {<a class="code" href="a00148.html#g69a7a4951ff21b302267532c21ee78fc">…
125 <a name="l00105"></a>00105 <a class="code" href="a00148.html#g69a7a4951ff21b302267532c21ee78fc">…
126 …a name="l00106"></a>00106 <span class="keyword">const</span> <a class="code" href="a00150.html#g1e…
127 <a name="l00107"></a>00107 {<a class="code" href="a00148.html#g69a7a4951ff21b302267532c21ee78fc">…
128 <a name="l00108"></a>00108 <a class="code" href="a00148.html#g69a7a4951ff21b302267532c21ee78fc">…
129 <a name="l00109"></a>00109 <span class="preprocessor">#else</span>
130 …a name="l00110"></a><a class="code" href="a00150.html#g3237be0d9ec457de0177689ee23c0d5c">00110</a>…
131 <a name="l00111"></a>00111 <span class="preprocessor">#endif </span><span class="comment">/* UIP_FI…
132 <a name="l00112"></a>00112
133 …a name="l00113"></a>00113 <span class="keyword">static</span> <span class="keyword">const</span> <…
134 <a name="l00114"></a>00114 <span class="preprocessor">#if UIP_CONF_IPV6</span>
135 <a name="l00115"></a>00115 <span class="preprocessor"></span> {0xffff,0xffff,0xffff,0xffff,0xffff,…
136 <a name="l00116"></a>00116 <span class="preprocessor">#else </span><span class="comment">/* UIP_CON…
137 <a name="l00117"></a>00117 {0xffff,0xffff};
138 <a name="l00118"></a>00118 <span class="preprocessor">#endif </span><span class="comment">/* UIP_CO…
139 …a name="l00119"></a>00119 <span class="keyword">static</span> <span class="keyword">const</span> <…
140 <a name="l00120"></a>00120 <span class="preprocessor">#if UIP_CONF_IPV6</span>
141 <a name="l00121"></a>00121 <span class="preprocessor"></span> {0x0000,0x0000,0x0000,0x0000,0x0000,…
142 <a name="l00122"></a>00122 <span class="preprocessor">#else </span><span class="comment">/* UIP_CON…
143 <a name="l00123"></a>00123 {0x0000,0x0000};
144 <a name="l00124"></a>00124 <span class="preprocessor">#endif </span><span class="comment">/* UIP_CO…
145 <a name="l00125"></a>00125
146 <a name="l00126"></a>00126
147 <a name="l00127"></a>00127 <span class="preprocessor">#if UIP_FIXEDETHADDR</span>
148 …a name="l00128"></a>00128 <span class="preprocessor"></span><span class="keyword">const</span> <sp…
149 <a name="l00129"></a>00129 UIP_ETHADDR1,
150 <a name="l00130"></a>00130 UIP_ETHADDR2,
151 <a name="l00131"></a>00131 UIP_ETHADDR3,
152 <a name="l00132"></a>00132 UIP_ETHADDR4,
153 <a name="l00133"></a>00133 UIP_ETHADDR5}};
154 <a name="l00134"></a>00134 <span class="preprocessor">#else</span>
155 …a name="l00135"></a><a class="code" href="a00152.html#g499bb98a0b4ae9a98553ede81317606d">00135</a>…
156 <a name="l00136"></a>00136 <span class="preprocessor">#endif</span>
157 <a name="l00137"></a>00137 <span class="preprocessor"></span>
158 <a name="l00138"></a>00138 <span class="preprocessor">#ifndef UIP_CONF_EXTERNAL_BUFFER</span>
159 …a name="l00139"></a><a class="code" href="a00150.html#gb81e78f890dbbee50c533a9734b74fd9">00139</a>…
160 <a name="l00140"></a>00140 <span class="comment"> incoming packe…
161 <a name="l00141"></a>00141 <span class="preprocessor">#endif </span><span class="comment">/* UIP_CO…
162 <a name="l00142"></a>00142
163 …a name="l00143"></a><a class="code" href="a00150.html#g561b8eda32e059d4e7397f776268cc63">00143</a>…
164 <a name="l00144"></a>00144 <span class="comment"> application da…
165 …a name="l00145"></a><a class="code" href="a00150.html#ga05a3dde2048480fa3ab2a5961898d18">00145</a>…
166 <a name="l00146"></a>00146 <span class="comment"> the applicatio…
167 <a name="l00147"></a>00147 <span class="comment"> be sent. */</s…
168 <a name="l00148"></a>00148 <span class="preprocessor">#if UIP_URGDATA > 0</span>
169 <a name="l00149"></a>00149 <span class="preprocessor"></span><span class="keywordtype">void</span> …
170 <a name="l00150"></a>00150 <span class="comment"> urgent data (o…
171 <a name="l00151"></a>00151 <span class="comment"> present. */</s…
172 <a name="l00152"></a>00152 <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16…
173 <a name="l00153"></a>00153 <span class="preprocessor">#endif </span><span class="comment">/* UIP_UR…
174 <a name="l00154"></a>00154
175 …a name="l00155"></a><a class="code" href="a00150.html#g5b5615dc240daed20949c0fded2b4679">00155</a>…
176 <a name="l00156"></a>00156 <span class="comment">/* The uip_len is eit…
177 <a name="l00157"></a>00157 <span class="comment"> depending on the m…
178 <a name="l00158"></a>00158 <span class="comment"> size. */</span>
179 <a name="l00159"></a>00159
180 …a name="l00160"></a><a class="code" href="a00150.html#gb4ef6b00924990e7a293f66715b6d1d1">00160</a>…
181 <a name="l00161"></a>00161 <span class="comment"> communication betw…
182 <a name="l00162"></a>00162 <span class="comment"> and the applicatio…
183 …a name="l00163"></a><a class="code" href="a00150.html#g788ffac72342f6172343d7f8099cbe1a">00163</a>…
184 <a name="l00164"></a>00164 <span class="comment"> connection. */</sp…
185 <a name="l00165"></a>00165
186 …a name="l00166"></a><a class="code" href="a00150.html#gf703683056d2bfa5c81fa157dcb20fe2">00166</a>…
187 <a name="l00167"></a>00167 <span class="comment">/* The uip_conns arra…
188 <a name="l00168"></a>00168 <span class="comment"> connections. */</s…
189 …a name="l00169"></a><a class="code" href="a00150.html#g236d5c7872f59c8fe7b701c7252b976e">00169</a>…
190 <a name="l00170"></a>00170 <span class="comment">/* The uip_listenport…
191 <a name="l00171"></a>00171 <span class="comment"> listning ports. */…
192 <a name="l00172"></a>00172 <span class="preprocessor">#if UIP_UDP</span>
193 …a name="l00173"></a><a class="code" href="a00150.html#g210f227119fc972e6222c9cb452e15a9">00173</a>…
194 …a name="l00174"></a><a class="code" href="a00150.html#geb533744817cf6695d75293369c2248b">00174</a>…
195 <a name="l00175"></a>00175 <span class="preprocessor">#endif </span><span class="comment">/* UIP_UD…
196 <a name="l00176"></a>00176
197 <a name="l00177"></a>00177 <span class="keyword">static</span> <a class="code" href="a00153.html#g7…
198 <a name="l00178"></a>00178 <span class="comment"> number that is use…
199 <a name="l00179"></a>00179 <span class="comment"> field. */</span>
200 <a name="l00180"></a>00180
201 …a name="l00181"></a><a class="code" href="a00150.html#g22f140b02c354dfebcc7ad481c3bcd68">00181</a>…
202 <a name="l00182"></a>00182
203 <a name="l00183"></a>00183 <span class="keyword">static</span> <a class="code" href="a00153.html#g4…
204 <a name="l00184"></a>00184 <span class="comment"> initial sequence n…
205 <a name="l00185"></a>00185
206 <a name="l00186"></a>00186 <span class="preprocessor">#if UIP_ACTIVE_OPEN</span>
207 …a name="l00187"></a>00187 <span class="preprocessor"></span><span class="keyword">static</span> <a…
208 <a name="l00188"></a>00188 <span class="comment"> a new connection. …
209 <a name="l00189"></a>00189 <span class="preprocessor">#endif </span><span class="comment">/* UIP_AC…
210 <a name="l00190"></a>00190
211 <a name="l00191"></a>00191 <span class="comment">/* Temporary variables. */</span>
212 …a name="l00192"></a><a class="code" href="a00150.html#g2a0cf5d86c58fab216414ce59bf1fea1">00192</a>…
213 <a name="l00193"></a>00193 <span class="keyword">static</span> <a class="code" href="a00153.html#g4…
214 <a name="l00194"></a>00194 <span class="keyword">static</span> <a class="code" href="a00153.html#g7…
215 <a name="l00195"></a>00195
216 <a name="l00196"></a>00196 <span class="comment">/* Structures and definitions. */</span>
217 <a name="l00197"></a><a class="code" href="a00150.html#g88e60aa2cf23e1c65d630701db08c743">00197</a>…
218 <a name="l00198"></a><a class="code" href="a00150.html#g6020613f5062417d9811cfa837215c83">00198</a>…
219 <a name="l00199"></a><a class="code" href="a00150.html#g5ca559def464ef20d8b1f7d32f2f160d">00199</a>…
220 <a name="l00200"></a><a class="code" href="a00150.html#g1320fd0006a2f70138bc2d0018dda829">00200</a>…
221 <a name="l00201"></a><a class="code" href="a00150.html#g44b3b1ab31a403ba28ec135adfcbefef">00201</a>…
222 <a name="l00202"></a><a class="code" href="a00150.html#gc84f499cba8a02fc0e306c10b2acabf0">00202</a>…
223 <a name="l00203"></a><a class="code" href="a00150.html#g1425d4a0c2760adb653a04c0fb137a8d">00203</a>…
224 <a name="l00204"></a>00204 <span class="preprocessor"></span>
225 <a name="l00205"></a><a class="code" href="a00150.html#g1215163245304bad20d6c5608ad75ab7">00205</a>…
226 <a name="l00206"></a><a class="code" href="a00150.html#g9f1822e1d231235edacad691f3cb7bbb">00206</a>…
227 <a name="l00207"></a><a class="code" href="a00150.html#g691688604655ea8943d15f14c60027d8">00207</a>…
228 <a name="l00208"></a>00208
229 <a name="l00209"></a><a class="code" href="a00150.html#g12f3bf821224b8e7b48a57ed3cea15cf">00209</a>…
230 <a name="l00210"></a>00210
231 <a name="l00211"></a><a class="code" href="a00150.html#g5c5b1834e497f53ad0ef947bbe9777fa">00211</a>…
232 <a name="l00212"></a><a class="code" href="a00150.html#gd58231410d58e34b455328b888a9e73c">00212</a>…
233 <a name="l00213"></a>00213 <span class="preprocessor"></span>
234 <a name="l00214"></a><a class="code" href="a00150.html#g207d17b633cd095120a74bc1f2257b17">00214</a>…
235 <a name="l00215"></a><a class="code" href="a00150.html#g4cc3e223b63f27b546d62e9a258dba5a">00215</a>…
236 <a name="l00216"></a><a class="code" href="a00150.html#g1cea57e3ea526f210b1068e6dcf7b4f4">00216</a>…
237 <a name="l00217"></a><a class="code" href="a00150.html#g62c03e0a308cc23929a80fe8d8f9dc1e">00217</a>…
238 <a name="l00218"></a>00218 <span class="preprocessor"></span>
239 <a name="l00219"></a><a class="code" href="a00150.html#g1d3211dbbdfb22d6a47b60dddcf945e8">00219</a>…
240 <a name="l00220"></a>00220 <span class="preprocessor"></span>
241 <a name="l00221"></a><a class="code" href="a00150.html#g42288d5c3cf4b10becefec657f441e54">00221</a>…
242 <a name="l00222"></a><a class="code" href="a00150.html#g8387881de3a8bfd3c0d57b9d04ac9b7e">00222</a>…
243 <a name="l00223"></a>00223 <span class="preprocessor"></span>
244 <a name="l00224"></a>00224
245 <a name="l00225"></a>00225 <span class="comment">/* Macros. */</span>
246 <a name="l00226"></a><a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">00226</a>…
247 <a name="l00227"></a><a class="code" href="a00150.html#g96544dedc1cdc71ad2ad54bf1d5e5433">00227</a>…
248 <a name="l00228"></a><a class="code" href="a00150.html#g4309376690872fa4beb4f025f5cc199b">00228</a>…
249 <a name="l00229"></a><a class="code" href="a00150.html#gb9435261753469accec0c9bf8a5a2686">00229</a>…
250 <a name="l00230"></a>00230 <span class="preprocessor"></span>
251 <a name="l00231"></a>00231
252 <a name="l00232"></a>00232 <span class="preprocessor">#if UIP_STATISTICS == 1</span>
253 …a name="l00233"></a>00233 <span class="preprocessor"></span><span class="keyword">struct </span><a…
254 <a name="l00234"></a>00234 <span class="preprocessor">#define UIP_STAT(s) s</span>
255 <a name="l00235"></a>00235 <span class="preprocessor"></span><span class="preprocessor">#else</span>
256 <a name="l00236"></a><a class="code" href="a00150.html#g9c0814ed491fa452ec97910c0728d410">00236</a>…
257 <a name="l00237"></a>00237 <span class="preprocessor"></span><span class="preprocessor">#endif </sp…
258 <a name="l00238"></a>00238
259 <a name="l00239"></a>00239 <span class="preprocessor">#if UIP_LOGGING == 1</span>
260 <a name="l00240"></a>00240 <span class="preprocessor"></span><span class="preprocessor">#include &l…
261 <a name="l00241"></a>00241 <span class="keywordtype">void</span> <a class="code" href="a00153.html#…
262 <a name="l00242"></a>00242 <span class="preprocessor">#define UIP_LOG(m) uip_log(m)</span>
263 <a name="l00243"></a>00243 <span class="preprocessor"></span><span class="preprocessor">#else</span>
264 <a name="l00244"></a><a class="code" href="a00150.html#g013c3a06a8b58589a77f4a3442f89c2a">00244</a>…
265 <a name="l00245"></a>00245 <span class="preprocessor"></span><span class="preprocessor">#endif </sp…
266 <a name="l00246"></a>00246
267 <a name="l00247"></a>00247 <span class="preprocessor">#if ! UIP_ARCH_ADD32</span>
268 <a name="l00248"></a>00248 <span class="preprocessor"></span><span class="keywordtype">void</span>
269 …a name="l00249"></a><a class="code" href="a00151.html#g6832e4d2d046536b6472f7ac92340f68">00249</a>…
270 <a name="l00250"></a>00250 {
271 <a name="l00251"></a>00251 uip_acc32[3] = op32[3] + (op16 & 0xff);
272 <a name="l00252"></a>00252 uip_acc32[2] = op32[2] + (op16 >> 8);
273 <a name="l00253"></a>00253 uip_acc32[1] = op32[1];
274 <a name="l00254"></a>00254 uip_acc32[0] = op32[0];
275 <a name="l00255"></a>00255
276 <a name="l00256"></a>00256 <span class="keywordflow">if</span>(uip_acc32[2] < (op16 >> 8…
277 <a name="l00257"></a>00257 ++uip_acc32[1];
278 <a name="l00258"></a>00258 <span class="keywordflow">if</span>(uip_acc32[1] == 0) {
279 <a name="l00259"></a>00259 ++uip_acc32[0];
280 <a name="l00260"></a>00260 }
281 <a name="l00261"></a>00261 }
282 <a name="l00262"></a>00262
283 <a name="l00263"></a>00263
284 <a name="l00264"></a>00264 <span class="keywordflow">if</span>(uip_acc32[3] < (op16 & 0xff…
285 <a name="l00265"></a>00265 ++uip_acc32[2];
286 <a name="l00266"></a>00266 <span class="keywordflow">if</span>(uip_acc32[2] == 0) {
287 <a name="l00267"></a>00267 ++uip_acc32[1];
288 <a name="l00268"></a>00268 <span class="keywordflow">if</span>(uip_acc32[1] == 0) {
289 <a name="l00269"></a>00269 ++uip_acc32[0];
290 <a name="l00270"></a>00270 }
291 <a name="l00271"></a>00271 }
292 <a name="l00272"></a>00272 }
293 <a name="l00273"></a>00273 }
294 <a name="l00274"></a>00274
295 <a name="l00275"></a>00275 <span class="preprocessor">#endif </span><span class="comment">/* UIP_AR…
296 <a name="l00276"></a>00276
297 <a name="l00277"></a>00277 <span class="preprocessor">#if ! UIP_ARCH_CHKSUM</span>
298 <a name="l00278"></a>00278 <span class="preprocessor"></span><span class="comment">/*--------------…
299 <a name="l00279"></a>00279 <span class="keyword">static</span> <a class="code" href="a00153.html#g7…
300 …a name="l00280"></a>00280 chksum(<a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676d…
301 <a name="l00281"></a>00281 {
302 <a name="l00282"></a>00282 <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u…
303 <a name="l00283"></a>00283 <span class="keyword">const</span> <a class="code" href="a00153.html#g…
304 <a name="l00284"></a>00284 <span class="keyword">const</span> <a class="code" href="a00153.html#g…
305 <a name="l00285"></a>00285
306 <a name="l00286"></a>00286 dataptr = data;
307 <a name="l00287"></a>00287 last_byte = data + len - 1;
308 <a name="l00288"></a>00288
309 <a name="l00289"></a>00289 <span class="keywordflow">while</span>(dataptr < last_byte) { <spa…
310 <a name="l00290"></a>00290 t = (dataptr[0] << 8) + dataptr[1];
311 <a name="l00291"></a>00291 sum += t;
312 <a name="l00292"></a>00292 <span class="keywordflow">if</span>(sum < t) {
313 <a name="l00293"></a>00293 sum++; <span class="comment">/* carry */</span>
314 <a name="l00294"></a>00294 }
315 <a name="l00295"></a>00295 dataptr += 2;
316 <a name="l00296"></a>00296 }
317 <a name="l00297"></a>00297
318 <a name="l00298"></a>00298 <span class="keywordflow">if</span>(dataptr == last_byte) {
319 <a name="l00299"></a>00299 t = (dataptr[0] << 8) + 0;
320 <a name="l00300"></a>00300 sum += t;
321 <a name="l00301"></a>00301 <span class="keywordflow">if</span>(sum < t) {
322 <a name="l00302"></a>00302 sum++; <span class="comment">/* carry */</span>
323 <a name="l00303"></a>00303 }
324 <a name="l00304"></a>00304 }
325 <a name="l00305"></a>00305
326 <a name="l00306"></a>00306 <span class="comment">/* Return sum in host byte order. */</span>
327 <a name="l00307"></a>00307 <span class="keywordflow">return</span> sum;
328 <a name="l00308"></a>00308 }
329 <a name="l00309"></a>00309 <span class="comment">/*------------------------------------------------…
330 <a name="l00310"></a>00310 <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16…
331 …a name="l00311"></a><a class="code" href="a00150.html#gb6683dd83fe1c8de9a24086d4b69e907">00311</a>…
332 <a name="l00312"></a>00312 {
333 …a name="l00313"></a>00313 <span class="keywordflow">return</span> <a class="code" href="a00148.h…
334 <a name="l00314"></a>00314 }
335 <a name="l00315"></a>00315 <span class="comment">/*------------------------------------------------…
336 <a name="l00316"></a>00316 <span class="preprocessor">#ifndef UIP_ARCH_IPCHKSUM</span>
337 <a name="l00317"></a>00317 <span class="preprocessor"></span><a class="code" href="a00153.html#g775…
338 …a name="l00318"></a><a class="code" href="a00150.html#g2addf34c7d457c1a7899a7e2171ef1e9">00318</a>…
339 <a name="l00319"></a>00319 {
340 <a name="l00320"></a>00320 <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u…
341 <a name="l00321"></a>00321
342 …a name="l00322"></a>00322 sum = chksum(0, &uip_buf[<a class="code" href="a00153.html#ge6f4a2…
343 <a name="l00323"></a>00323 <a class="code" href="a00135.html#534d9e416324fb8ecca6b9cb4b1f6a6a">DE…
344 …a name="l00324"></a>00324 <span class="keywordflow">return</span> (sum == 0) ? 0xffff : <a class…
345 <a name="l00325"></a>00325 }
346 <a name="l00326"></a>00326 <span class="preprocessor">#endif</span>
347 <a name="l00327"></a>00327 <span class="preprocessor"></span><span class="comment">/*--------------…
348 <a name="l00328"></a>00328 <span class="keyword">static</span> <a class="code" href="a00153.html#g7…
349 <a name="l00329"></a>00329 upper_layer_chksum(<a class="code" href="a00153.html#g4caecabca98b43919d…
350 <a name="l00330"></a>00330 {
351 <a name="l00331"></a>00331 <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u…
352 <a name="l00332"></a>00332 <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u…
353 <a name="l00333"></a>00333
354 <a name="l00334"></a>00334 <span class="preprocessor">#if UIP_CONF_IPV6</span>
355 …a name="l00335"></a>00335 <span class="preprocessor"></span> upper_layer_len = (((<a class="code"…
356 <a name="l00336"></a>00336 <span class="preprocessor">#else </span><span class="comment">/* UIP_CON…
357 …a name="l00337"></a>00337 upper_layer_len = (((<a class="code" href="a00153.html#g77570ac4fcab86…
358 <a name="l00338"></a>00338 <span class="preprocessor">#endif </span><span class="comment">/* UIP_CO…
359 <a name="l00339"></a>00339
360 <a name="l00340"></a>00340 <span class="comment">/* First sum pseudoheader. */</span>
361 <a name="l00341"></a>00341
362 <a name="l00342"></a>00342 <span class="comment">/* IP protocol and length fields. This addition …
363 <a name="l00343"></a>00343 sum = upper_layer_len + proto;
364 <a name="l00344"></a>00344 <span class="comment">/* Sum IP source and destination addresses. */</…
365 …a name="l00345"></a>00345 sum = chksum(sum, (<a class="code" href="a00153.html#g4caecabca98b4391…
366 <a name="l00346"></a>00346
367 <a name="l00347"></a>00347 <span class="comment">/* Sum TCP header and data. */</span>
368 …a name="l00348"></a>00348 sum = chksum(sum, &uip_buf[<a class="code" href="a00150.html#g6bc1…
369 <a name="l00349"></a>00349 upper_layer_len);
370 <a name="l00350"></a>00350
371 …a name="l00351"></a>00351 <span class="keywordflow">return</span> (sum == 0) ? 0xffff : <a class…
372 <a name="l00352"></a>00352 }
373 <a name="l00353"></a>00353 <span class="comment">/*------------------------------------------------…
374 <a name="l00354"></a>00354 <span class="preprocessor">#if UIP_CONF_IPV6</span>
375 <a name="l00355"></a>00355 <span class="preprocessor"></span><a class="code" href="a00153.html#g775…
376 <a name="l00356"></a>00356 uip_icmp6chksum(<span class="keywordtype">void</span>)
377 <a name="l00357"></a>00357 {
378 …a name="l00358"></a>00358 <span class="keywordflow">return</span> upper_layer_chksum(<a class="c…
379 <a name="l00359"></a>00359
380 <a name="l00360"></a>00360 }
381 <a name="l00361"></a>00361 <span class="preprocessor">#endif </span><span class="comment">/* UIP_CO…
382 <a name="l00362"></a>00362 <span class="comment">/*------------------------------------------------…
383 <a name="l00363"></a>00363 <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16…
384 …a name="l00364"></a><a class="code" href="a00150.html#g85b65e38aa74eba18979156f97a94a87">00364</a>…
385 <a name="l00365"></a>00365 {
386 …a name="l00366"></a>00366 <span class="keywordflow">return</span> upper_layer_chksum(<a class="c…
387 <a name="l00367"></a>00367 }
388 <a name="l00368"></a>00368 <span class="comment">/*------------------------------------------------…
389 <a name="l00369"></a>00369 <span class="preprocessor">#if UIP_UDP_CHECKSUMS</span>
390 <a name="l00370"></a>00370 <span class="preprocessor"></span><a class="code" href="a00153.html#g775…
391 <a name="l00371"></a>00371 <a class="code" href="a00150.html#g7023a34ba9e9d03b5fbedbcb32924453">uip…
392 <a name="l00372"></a>00372 {
393 …a name="l00373"></a>00373 <span class="keywordflow">return</span> upper_layer_chksum(<a class="c…
394 <a name="l00374"></a>00374 }
395 <a name="l00375"></a>00375 <span class="preprocessor">#endif </span><span class="comment">/* UIP_UD…
396 <a name="l00376"></a>00376 <span class="preprocessor">#endif </span><span class="comment">/* UIP_AR…
397 <a name="l00377"></a>00377 <span class="comment">/*------------------------------------------------…
398 <a name="l00378"></a>00378 <span class="keywordtype">void</span>
399 …a name="l00379"></a><a class="code" href="a00150.html#gc48ed5f0d27721ef62a3ed02a5ad8d2e">00379</a>…
400 <a name="l00380"></a>00380 {
401 …a name="l00381"></a>00381 <span class="keywordflow">for</span>(c = 0; c < <a class="code" hre…
402 <a name="l00382"></a>00382 uip_listenports[c] = 0;
403 <a name="l00383"></a>00383 }
404 …a name="l00384"></a>00384 <span class="keywordflow">for</span>(c = 0; c < <a class="code" hre…
405 …a name="l00385"></a>00385 <a class="code" href="a00150.html#gf703683056d2bfa5c81fa157dcb20fe2"…
406 <a name="l00386"></a>00386 }
407 <a name="l00387"></a>00387 <span class="preprocessor">#if UIP_ACTIVE_OPEN</span>
408 <a name="l00388"></a>00388 <span class="preprocessor"></span> lastport = 1024;
409 <a name="l00389"></a>00389 <span class="preprocessor">#endif </span><span class="comment">/* UIP_AC…
410 <a name="l00390"></a>00390
411 <a name="l00391"></a>00391 <span class="preprocessor">#if UIP_UDP</span>
412 …a name="l00392"></a>00392 <span class="preprocessor"></span> <span class="keywordflow">for</span>…
413 <a name="l00393"></a>00393 <a class="code" href="a00150.html#geb533744817cf6695d75293369c2248b"…
414 <a name="l00394"></a>00394 }
415 <a name="l00395"></a>00395 <span class="preprocessor">#endif </span><span class="comment">/* UIP_UD…
416 <a name="l00396"></a>00396
417 <a name="l00397"></a>00397
418 <a name="l00398"></a>00398 <span class="comment">/* IPv4 initialization. */</span>
419 <a name="l00399"></a>00399 <span class="preprocessor">#if UIP_FIXEDADDR == 0</span>
420 <a name="l00400"></a>00400 <span class="preprocessor"></span> <span class="comment">/* uip_hostad…
421 <a name="l00401"></a>00401 <span class="preprocessor">#endif </span><span class="comment">/* UIP_FI…
422 <a name="l00402"></a>00402
423 <a name="l00403"></a>00403 }
424 <a name="l00404"></a>00404 <span class="comment">/*------------------------------------------------…
425 <a name="l00405"></a>00405 <span class="preprocessor">#if UIP_ACTIVE_OPEN</span>
426 …a name="l00406"></a>00406 <span class="preprocessor"></span><span class="keyword">struct </span><a…
427 …a name="l00407"></a><a class="code" href="a00150.html#g9c24fba2cd8f7f62accb0a0d5bbe4dad">00407</a>…
428 <a name="l00408"></a>00408 {
429 …a name="l00409"></a>00409 <span class="keyword">register</span> <span class="keyword">struct </s…
430 <a name="l00410"></a>00410
431 <a name="l00411"></a>00411 <span class="comment">/* Find an unused local port. */</span>
432 <a name="l00412"></a>00412 again:
433 <a name="l00413"></a>00413 ++lastport;
434 <a name="l00414"></a>00414
435 <a name="l00415"></a>00415 <span class="keywordflow">if</span>(lastport >= 32000) {
436 <a name="l00416"></a>00416 lastport = 4096;
437 <a name="l00417"></a>00417 }
438 <a name="l00418"></a>00418
439 <a name="l00419"></a>00419 <span class="comment">/* Check if this port is already in use, and if …
440 <a name="l00420"></a>00420 <span class="comment"> another one. */</span>
441 …a name="l00421"></a>00421 <span class="keywordflow">for</span>(c = 0; c < <a class="code" hre…
442 <a name="l00422"></a>00422 conn = &<a class="code" href="a00150.html#gf703683056d2bfa5c81fa…
443 …a name="l00423"></a>00423 <span class="keywordflow">if</span>(conn-><a class="code" href="a…
444 …a name="l00424"></a>00424 conn-><a class="code" href="a00088.html#0cd09beee671e7e9efb0b4…
445 <a name="l00425"></a>00425 <span class="keywordflow">goto</span> again;
446 <a name="l00426"></a>00426 }
447 <a name="l00427"></a>00427 }
448 <a name="l00428"></a>00428
449 <a name="l00429"></a>00429 conn = 0;
450 …a name="l00430"></a>00430 <span class="keywordflow">for</span>(c = 0; c < <a class="code" hre…
451 <a name="l00431"></a>00431 cconn = &<a class="code" href="a00150.html#gf703683056d2bfa5c81f…
452 …a name="l00432"></a>00432 <span class="keywordflow">if</span>(cconn->tcpstateflags == <a cl…
453 <a name="l00433"></a>00433 conn = cconn;
454 <a name="l00434"></a>00434 <span class="keywordflow">break</span>;
455 <a name="l00435"></a>00435 }
456 …a name="l00436"></a>00436 <span class="keywordflow">if</span>(cconn->tcpstateflags == <a cl…
457 <a name="l00437"></a>00437 <span class="keywordflow">if</span>(conn == 0 ||
458 <a name="l00438"></a>00438 cconn->timer > conn->timer) {
459 <a name="l00439"></a>00439 conn = cconn;
460 <a name="l00440"></a>00440 }
461 <a name="l00441"></a>00441 }
462 <a name="l00442"></a>00442 }
463 <a name="l00443"></a>00443
464 <a name="l00444"></a>00444 <span class="keywordflow">if</span>(conn == 0) {
465 <a name="l00445"></a>00445 <span class="keywordflow">return</span> 0;
466 <a name="l00446"></a>00446 }
467 <a name="l00447"></a>00447
468 …a name="l00448"></a>00448 conn-><a class="code" href="a00088.html#a5f58074435cdc180f17de69651…
469 <a name="l00449"></a>00449
470 <a name="l00450"></a>00450 conn->snd_nxt[0] = iss[0];
471 <a name="l00451"></a>00451 conn->snd_nxt[1] = iss[1];
472 <a name="l00452"></a>00452 conn->snd_nxt[2] = iss[2];
473 <a name="l00453"></a>00453 conn->snd_nxt[3] = iss[3];
474 <a name="l00454"></a>00454
475 <a name="l00455"></a>00455 conn->initialmss = conn->mss = <a class="code" href="a00153.html…
476 <a name="l00456"></a>00456
477 <a name="l00457"></a>00457 conn->len = 1; <span class="comment">/* TCP length of the SYN is …
478 <a name="l00458"></a>00458 conn->nrtx = 0;
479 <a name="l00459"></a>00459 conn->timer = 1; <span class="comment">/* Send the SYN next time ar…
480 <a name="l00460"></a>00460 conn->rto = <a class="code" href="a00153.html#g15de27b044603284f68d…
481 <a name="l00461"></a>00461 conn->sa = 0;
482 <a name="l00462"></a>00462 conn->sv = 16; <span class="comment">/* Initial value of the RTT …
483 <a name="l00463"></a>00463 conn->lport = <a class="code" href="a00148.html#ga22b04cac8cf283ca1…
484 <a name="l00464"></a>00464 conn->rport = <a class="code" href="a00088.html#1df6aa054ef2fa634ac…
485 …a name="l00465"></a>00465 <a class="code" href="a00148.html#g769512993b7b27271909d6daa4748b60">u…
486 <a name="l00466"></a>00466
487 <a name="l00467"></a>00467 <span class="keywordflow">return</span> conn;
488 <a name="l00468"></a>00468 }
489 <a name="l00469"></a>00469 <span class="preprocessor">#endif </span><span class="comment">/* UIP_AC…
490 <a name="l00470"></a>00470 <span class="comment">/*------------------------------------------------…
491 <a name="l00471"></a>00471 <span class="preprocessor">#if UIP_UDP</span>
492 …a name="l00472"></a>00472 <span class="preprocessor"></span><span class="keyword">struct </span><a…
493 …a name="l00473"></a><a class="code" href="a00150.html#g79c4110211247df3fb30b8cf1c4c02af">00473</a>…
494 <a name="l00474"></a>00474 {
495 …a name="l00475"></a>00475 <span class="keyword">register</span> <span class="keyword">struct </s…
496 <a name="l00476"></a>00476
497 <a name="l00477"></a>00477 <span class="comment">/* Find an unused local port. */</span>
498 <a name="l00478"></a>00478 again:
499 <a name="l00479"></a>00479 ++lastport;
500 <a name="l00480"></a>00480
501 <a name="l00481"></a>00481 <span class="keywordflow">if</span>(lastport >= 32000) {
502 <a name="l00482"></a>00482 lastport = 4096;
503 <a name="l00483"></a>00483 }
504 <a name="l00484"></a>00484
505 …a name="l00485"></a>00485 <span class="keywordflow">for</span>(c = 0; c < <a class="code" hre…
506 …a name="l00486"></a>00486 <span class="keywordflow">if</span>(<a class="code" href="a00150.htm…
507 <a name="l00487"></a>00487 <span class="keywordflow">goto</span> again;
508 <a name="l00488"></a>00488 }
509 <a name="l00489"></a>00489 }
510 <a name="l00490"></a>00490
511 <a name="l00491"></a>00491
512 <a name="l00492"></a>00492 conn = 0;
513 …a name="l00493"></a>00493 <span class="keywordflow">for</span>(c = 0; c < <a class="code" hre…
514 …a name="l00494"></a>00494 <span class="keywordflow">if</span>(<a class="code" href="a00150.htm…
515 <a name="l00495"></a>00495 conn = &<a class="code" href="a00150.html#geb533744817cf6695d7…
516 <a name="l00496"></a>00496 <span class="keywordflow">break</span>;
517 <a name="l00497"></a>00497 }
518 <a name="l00498"></a>00498 }
519 <a name="l00499"></a>00499
520 <a name="l00500"></a>00500 <span class="keywordflow">if</span>(conn == 0) {
521 <a name="l00501"></a>00501 <span class="keywordflow">return</span> 0;
522 <a name="l00502"></a>00502 }
523 <a name="l00503"></a>00503
524 …a name="l00504"></a>00504 conn-><a class="code" href="a00095.html#981392e295db4d024eea95805c5…
525 <a name="l00505"></a>00505 conn->rport = <a class="code" href="a00095.html#280a0c2a93544e597f9…
526 …a name="l00506"></a>00506 <span class="keywordflow">if</span>(<a class="code" href="a00095.html#…
527 …a name="l00507"></a>00507 memset(conn->ripaddr, 0, <span class="keyword">sizeof</span>(<a c…
528 <a name="l00508"></a>00508 } <span class="keywordflow">else</span> {
529 …a name="l00509"></a>00509 <a class="code" href="a00148.html#g769512993b7b27271909d6daa4748b60"…
530 <a name="l00510"></a>00510 }
531 <a name="l00511"></a>00511 conn->ttl = <a class="code" href="a00153.html#gb61381673de27f31848c…
532 <a name="l00512"></a>00512
533 <a name="l00513"></a>00513 <span class="keywordflow">return</span> conn;
534 <a name="l00514"></a>00514 }
535 <a name="l00515"></a>00515 <span class="preprocessor">#endif </span><span class="comment">/* UIP_UD…
536 <a name="l00516"></a>00516 <span class="comment">/*------------------------------------------------…
537 <a name="l00517"></a>00517 <span class="keywordtype">void</span>
538 …a name="l00518"></a><a class="code" href="a00150.html#gaa585784b0914cac1d37f07f85457008">00518</a>…
539 <a name="l00519"></a>00519 {
540 …a name="l00520"></a>00520 <span class="keywordflow">for</span>(c = 0; c < <a class="code" hre…
541 <a name="l00521"></a>00521 <span class="keywordflow">if</span>(uip_listenports[c] == port) {
542 <a name="l00522"></a>00522 uip_listenports[c] = 0;
543 <a name="l00523"></a>00523 <span class="keywordflow">return</span>;
544 <a name="l00524"></a>00524 }
545 <a name="l00525"></a>00525 }
546 <a name="l00526"></a>00526 }
547 <a name="l00527"></a>00527 <span class="comment">/*------------------------------------------------…
548 <a name="l00528"></a>00528 <span class="keywordtype">void</span>
549 …a name="l00529"></a><a class="code" href="a00150.html#gdd1ab3704ecd4900eec61a6897d32dc8">00529</a>…
550 <a name="l00530"></a>00530 {
551 …a name="l00531"></a>00531 <span class="keywordflow">for</span>(c = 0; c < <a class="code" hre…
552 <a name="l00532"></a>00532 <span class="keywordflow">if</span>(uip_listenports[c] == 0) {
553 <a name="l00533"></a>00533 uip_listenports[c] = port;
554 <a name="l00534"></a>00534 <span class="keywordflow">return</span>;
555 <a name="l00535"></a>00535 }
556 <a name="l00536"></a>00536 }
557 <a name="l00537"></a>00537 }
558 <a name="l00538"></a>00538 <span class="comment">/*------------------------------------------------…
559 <a name="l00539"></a>00539 <span class="comment">/* XXX: IP fragment reassembly: not well-tested. *…
560 <a name="l00540"></a>00540
561 <a name="l00541"></a>00541 <span class="preprocessor">#if UIP_REASSEMBLY && !UIP_CONF_IPV6<…
562 <a name="l00542"></a>00542 <span class="preprocessor"></span><span class="preprocessor">#define UIP…
563 …a name="l00543"></a>00543 <span class="preprocessor"></span><span class="keyword">static</span> <a…
564 <a name="l00544"></a>00544 <span class="keyword">static</span> <a class="code" href="a00153.html#g4…
565 …a name="l00545"></a>00545 <span class="keyword">static</span> <span class="keyword">const</span> <…
566 <a name="l00546"></a>00546 0x0f, 0x07, 0x03, 0x01};
567 <a name="l00547"></a>00547 <span class="keyword">static</span> <a class="code" href="a00153.html#g7…
568 <a name="l00548"></a>00548 <span class="keyword">static</span> <a class="code" href="a00153.html#g4…
569 <a name="l00549"></a>00549 <span class="preprocessor">#define UIP_REASS_FLAG_LASTFRAG 0x01</span>
570 …a name="l00550"></a>00550 <span class="preprocessor"></span><span class="keyword">static</span> <a…
571 <a name="l00551"></a>00551
572 <a name="l00552"></a>00552 <span class="preprocessor">#define IP_MF 0x20</span>
573 <a name="l00553"></a>00553 <span class="preprocessor"></span>
574 <a name="l00554"></a>00554 <span class="keyword">static</span> <a class="code" href="a00153.html#g4…
575 <a name="l00555"></a>00555 uip_reass(<span class="keywordtype">void</span>)
576 <a name="l00556"></a>00556 {
577 <a name="l00557"></a>00557 <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u…
578 <a name="l00558"></a>00558 <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u…
579 <a name="l00559"></a>00559
580 <a name="l00560"></a>00560 <span class="comment">/* If ip_reasstmr is zero, no packet is present …
581 <a name="l00561"></a>00561 <span class="comment"> write the IP header of the fragment into the …
582 <a name="l00562"></a>00562 <span class="comment"> buffer. The timer is updated with the maximum…
583 <a name="l00563"></a>00563 <span class="keywordflow">if</span>(uip_reasstmr == 0) {
584 …a name="l00564"></a>00564 memcpy(uip_reassbuf, &<a class="code" href="a00150.html#g24f52ac…
585 <a name="l00565"></a>00565 uip_reasstmr = <a class="code" href="a00153.html#gc3882366feda1cb759…
586 <a name="l00566"></a>00566 uip_reassflags = 0;
587 <a name="l00567"></a>00567 <span class="comment">/* Clear the bitmap. */</span>
588 <a name="l00568"></a>00568 memset(uip_reassbitmap, 0, <span class="keyword">sizeof</span>(uip_r…
589 <a name="l00569"></a>00569 }
590 <a name="l00570"></a>00570
591 <a name="l00571"></a>00571 <span class="comment">/* Check if the incoming fragment matches the on…
592 <a name="l00572"></a>00572 <span class="comment"> in the reasembly buffer. If so, we proceed wi…
593 <a name="l00573"></a>00573 <span class="comment"> fragment into the buffer. */</span>
594 …a name="l00574"></a>00574 <span class="keywordflow">if</span>(<a class="code" href="a00150.html#…
595 …a name="l00575"></a>00575 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0…
596 …a name="l00576"></a>00576 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0…
597 …a name="l00577"></a>00577 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0…
598 …a name="l00578"></a>00578 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0…
599 …a name="l00579"></a>00579 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0…
600 <a name="l00580"></a>00580
601 …a name="l00581"></a>00581 len = (<a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01b…
602 …a name="l00582"></a>00582 offset = (((<a class="code" href="a00150.html#g24f52ac52d6e714cb04a5…
603 <a name="l00583"></a>00583
604 <a name="l00584"></a>00584 <span class="comment">/* If the offset or the offset + fragment leng…
605 <a name="l00585"></a>00585 <span class="comment"> reassembly buffer, we discard the entire pa…
606 <a name="l00586"></a>00586 <span class="keywordflow">if</span>(offset > UIP_REASS_BUFSIZE ||
607 <a name="l00587"></a>00587 offset + len > UIP_REASS_BUFSIZE) {
608 <a name="l00588"></a>00588 uip_reasstmr = 0;
609 <a name="l00589"></a>00589 <span class="keywordflow">goto</span> nullreturn;
610 <a name="l00590"></a>00590 }
611 <a name="l00591"></a>00591
612 <a name="l00592"></a>00592 <span class="comment">/* Copy the fragment into the reassembly buffe…
613 <a name="l00593"></a>00593 <span class="comment"> offset. */</span>
614 <a name="l00594"></a>00594 memcpy(&uip_reassbuf[<a class="code" href="a00150.html#g6bc12c6c…
615 …a name="l00595"></a>00595 (<span class="keywordtype">char</span> *)<a class="code" href…
616 <a name="l00596"></a>00596 len);
617 <a name="l00597"></a>00597
618 <a name="l00598"></a>00598 <span class="comment">/* Update the bitmap. */</span>
619 <a name="l00599"></a>00599 <span class="keywordflow">if</span>(offset / (8 * 8) == (offset + le…
620 <a name="l00600"></a>00600 <span class="comment">/* If the two endpoints are in the same byte…
621 <a name="l00601"></a>00601 <span class="comment"> that byte. */</span>
622 <a name="l00602"></a>00602
623 <a name="l00603"></a>00603 uip_reassbitmap[offset / (8 * 8)] |=
624 <a name="l00604"></a>00604 bitmap_bits[(offset / 8 ) & 7] &
625 <a name="l00605"></a>00605 ~bitmap_bits[((offset + len) / 8 ) & 7];
626 <a name="l00606"></a>00606 } <span class="keywordflow">else</span> {
627 <a name="l00607"></a>00607 <span class="comment">/* If the two endpoints are in different byt…
628 <a name="l00608"></a>00608 <span class="comment"> bytes in the endpoints and fill the stuff…
629 <a name="l00609"></a>00609 <span class="comment"> 0xff. */</span>
630 <a name="l00610"></a>00610 uip_reassbitmap[offset / (8 * 8)] |=
631 <a name="l00611"></a>00611 bitmap_bits[(offset / 8 ) & 7];
632 <a name="l00612"></a>00612 <span class="keywordflow">for</span>(i = 1 + offset / (8 * 8); i &…
633 <a name="l00613"></a>00613 uip_reassbitmap[i] = 0xff;
634 <a name="l00614"></a>00614 }
635 <a name="l00615"></a>00615 uip_reassbitmap[(offset + len) / (8 * 8)] |=
636 <a name="l00616"></a>00616 ~bitmap_bits[((offset + len) / 8 ) & 7];
637 <a name="l00617"></a>00617 }
638 <a name="l00618"></a>00618
639 <a name="l00619"></a>00619 <span class="comment">/* If this fragment has the More Fragments fla…
640 <a name="l00620"></a>00620 <span class="comment"> know that this is the last fragment, so we …
641 <a name="l00621"></a>00621 <span class="comment"> size of the entire packet. We also set the<…
642 <a name="l00622"></a>00622 <span class="comment"> IP_REASS_FLAG_LASTFRAG flag to indicate tha…
643 <a name="l00623"></a>00623 <span class="comment"> the final fragment. */</span>
644 <a name="l00624"></a>00624
645 <a name="l00625"></a>00625 <span class="keywordflow">if</span>((<a class="code" href="a00150.ht…
646 <a name="l00626"></a>00626 uip_reassflags |= UIP_REASS_FLAG_LASTFRAG;
647 <a name="l00627"></a>00627 uip_reasslen = offset + len;
648 <a name="l00628"></a>00628 }
649 <a name="l00629"></a>00629
650 <a name="l00630"></a>00630 <span class="comment">/* Finally, we check if we have a full packet …
651 <a name="l00631"></a>00631 <span class="comment"> this by checking if we have the last fragme…
652 <a name="l00632"></a>00632 <span class="comment"> in the bitmap are set. */</span>
653 <a name="l00633"></a>00633 <span class="keywordflow">if</span>(uip_reassflags & UIP_REASS_F…
654 <a name="l00634"></a>00634 <span class="comment">/* Check all bytes up to and including all b…
655 <a name="l00635"></a>00635 <span class="comment"> the bitmap. */</span>
656 <a name="l00636"></a>00636 <span class="keywordflow">for</span>(i = 0; i < uip_reasslen / …
657 <a name="l00637"></a>00637 <span class="keywordflow">if</span>(uip_reassbitmap[i] != 0xff) {
658 <a name="l00638"></a>00638 <span class="keywordflow">goto</span> nullreturn;
659 <a name="l00639"></a>00639 }
660 <a name="l00640"></a>00640 }
661 <a name="l00641"></a>00641 <span class="comment">/* Check the last byte in the bitmap. It sho…
662 <a name="l00642"></a>00642 <span class="comment"> right amount of bits. */</span>
663 <a name="l00643"></a>00643 <span class="keywordflow">if</span>(uip_reassbitmap[uip_reasslen /…
664 <a name="l00644"></a>00644 (<a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d…
665 <a name="l00645"></a>00645 <span class="keywordflow">goto</span> nullreturn;
666 <a name="l00646"></a>00646 }
667 <a name="l00647"></a>00647
668 <a name="l00648"></a>00648 <span class="comment">/* If we have come this far, we have a full …
669 <a name="l00649"></a>00649 <span class="comment"> buffer, so we allocate a pbuf and copy th…
670 <a name="l00650"></a>00650 <span class="comment"> also reset the timer. */</span>
671 <a name="l00651"></a>00651 uip_reasstmr = 0;
672 …a name="l00652"></a>00652 memcpy(<a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa0…
673 <a name="l00653"></a>00653
674 <a name="l00654"></a>00654 <span class="comment">/* Pretend to be a "normal" (i.e., not fragm…
675 <a name="l00655"></a>00655 <span class="comment"> from now on. */</span>
676 …a name="l00656"></a>00656 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd…
677 <a name="l00657"></a>00657 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd…
678 <a name="l00658"></a>00658 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd…
679 <a name="l00659"></a>00659 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd…
680 …a name="l00660"></a>00660 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd…
681 <a name="l00661"></a>00661
682 <a name="l00662"></a>00662 <span class="keywordflow">return</span> uip_reasslen;
683 <a name="l00663"></a>00663 }
684 <a name="l00664"></a>00664 }
685 <a name="l00665"></a>00665
686 <a name="l00666"></a>00666 nullreturn:
687 <a name="l00667"></a>00667 <span class="keywordflow">return</span> 0;
688 <a name="l00668"></a>00668 }
689 <a name="l00669"></a>00669 <span class="preprocessor">#endif </span><span class="comment">/* UIP_RE…
690 <a name="l00670"></a>00670 <span class="comment">/*------------------------------------------------…
691 <a name="l00671"></a>00671 <span class="keyword">static</span> <span class="keywordtype">void</span>
692 <a name="l00672"></a>00672 uip_add_rcv_nxt(<a class="code" href="a00153.html#g77570ac4fcab86864fa19…
693 <a name="l00673"></a>00673 {
694 …a name="l00674"></a>00674 <a class="code" href="a00150.html#g6832e4d2d046536b6472f7ac92340f68">u…
695 …a name="l00675"></a>00675 <a class="code" href="a00088.html">uip_conn</a>->rcv_nxt[0] = <a cl…
696 …a name="l00676"></a>00676 <a class="code" href="a00088.html">uip_conn</a>->rcv_nxt[1] = <a cl…
697 …a name="l00677"></a>00677 <a class="code" href="a00088.html">uip_conn</a>->rcv_nxt[2] = <a cl…
698 …a name="l00678"></a>00678 <a class="code" href="a00088.html">uip_conn</a>->rcv_nxt[3] = <a cl…
699 <a name="l00679"></a>00679 }
700 <a name="l00680"></a>00680 <span class="comment">/*------------------------------------------------…
701 <a name="l00681"></a>00681 <span class="keywordtype">void</span>
702 …a name="l00682"></a><a class="code" href="a00150.html#g266263ac78a1361a2b1d15741d3b0675">00682</a>…
703 <a name="l00683"></a>00683 {
704 …a name="l00684"></a>00684 <span class="keyword">register</span> <span class="keyword">struct </s…
705 <a name="l00685"></a>00685
706 <a name="l00686"></a>00686 <span class="preprocessor">#if UIP_UDP</span>
707 …a name="l00687"></a>00687 <span class="preprocessor"></span> <span class="keywordflow">if</span>(…
708 <a name="l00688"></a>00688 <span class="keywordflow">goto</span> udp_send;
709 <a name="l00689"></a>00689 }
710 <a name="l00690"></a>00690 <span class="preprocessor">#endif </span><span class="comment">/* UIP_UD…
711 <a name="l00691"></a>00691
712 …a name="l00692"></a>00692 <a class="code" href="a00150.html#ga05a3dde2048480fa3ab2a5961898d18">u…
713 <a name="l00693"></a>00693
714 <a name="l00694"></a>00694 <span class="comment">/* Check if we were invoked because of a poll re…
715 <a name="l00695"></a>00695 <span class="comment"> particular connection. */</span>
716 …a name="l00696"></a>00696 <span class="keywordflow">if</span>(flag == <a class="code" href="a001…
717 …a name="l00697"></a>00697 <span class="keywordflow">if</span>((uip_connr-><a class="code" h…
718 <a name="l00698"></a>00698 !<a class="code" href="a00147.html#gef14e83c046e19ab9fe9d1bbcca27…
719 …a name="l00699"></a>00699 <a class="code" href="a00150.html#gb4ef6b00924990e7a293f66715b6d…
720 <a name="l00700"></a>00700 <a class="code" href="a00153.html#g41aa744caa46913b3b3aedb2a4e78…
721 <a name="l00701"></a>00701 <span class="keywordflow">goto</span> appsend;
722 <a name="l00702"></a>00702 }
723 <a name="l00703"></a>00703 <span class="keywordflow">goto</span> drop;
724 <a name="l00704"></a>00704
725 <a name="l00705"></a>00705 <span class="comment">/* Check if we were invoked because of the per…
726 …a name="l00706"></a>00706 } <span class="keywordflow">else</span> <span class="keywordflow">if</…
727 <a name="l00707"></a>00707 <span class="preprocessor">#if UIP_REASSEMBLY</span>
728 <a name="l00708"></a>00708 <span class="preprocessor"></span> <span class="keywordflow">if</span…
729 <a name="l00709"></a>00709 --uip_reasstmr;
730 <a name="l00710"></a>00710 }
731 <a name="l00711"></a>00711 <span class="preprocessor">#endif </span><span class="comment">/* UIP_RE…
732 <a name="l00712"></a>00712 <span class="comment">/* Increase the initial sequence number. */</s…
733 <a name="l00713"></a>00713 <span class="keywordflow">if</span>(++iss[3] == 0) {
734 <a name="l00714"></a>00714 <span class="keywordflow">if</span>(++iss[2] == 0) {
735 <a name="l00715"></a>00715 <span class="keywordflow">if</span>(++iss[1] == 0) {
736 <a name="l00716"></a>00716 ++iss[0];
737 <a name="l00717"></a>00717 }
738 <a name="l00718"></a>00718 }
739 <a name="l00719"></a>00719 }
740 <a name="l00720"></a>00720
741 <a name="l00721"></a>00721 <span class="comment">/* Reset the length variables. */</span>
742 <a name="l00722"></a>00722 <a class="code" href="a00149.html#g12a33f0c09711167bdf3dd7d7cf8c5a1"…
743 <a name="l00723"></a>00723 <a class="code" href="a00150.html#g5b5615dc240daed20949c0fded2b4679"…
744 <a name="l00724"></a>00724
745 <a name="l00725"></a>00725 <span class="comment">/* Check if the connection is in a state in wh…
746 <a name="l00726"></a>00726 <span class="comment"> for the connection to time out. If so, we i…
747 <a name="l00727"></a>00727 <span class="comment"> connection's timer and remove the connectio…
748 <a name="l00728"></a>00728 <span class="comment"> out. */</span>
749 …a name="l00729"></a>00729 <span class="keywordflow">if</span>(uip_connr-><a class="code" hr…
750 …a name="l00730"></a>00730 uip_connr-><a class="code" href="a00088.html#a5f58074435cdc180…
751 <a name="l00731"></a>00731 ++(uip_connr-><a class="code" href="a00088.html#2d9732cf5752d30…
752 …a name="l00732"></a>00732 <span class="keywordflow">if</span>(uip_connr-><a class="code" …
753 …a name="l00733"></a>00733 uip_connr-><a class="code" href="a00088.html#a5f58074435cdc18…
754 <a name="l00734"></a>00734 }
755 …a name="l00735"></a>00735 } <span class="keywordflow">else</span> <span class="keywordflow">if…
756 <a name="l00736"></a>00736 <span class="comment">/* If the connection has outstanding data, w…
757 <a name="l00737"></a>00737 <span class="comment"> connection's timer and see if it has reac…
758 <a name="l00738"></a>00738 <span class="comment"> in which case we retransmit. */</span>
759 …a name="l00739"></a>00739 <span class="keywordflow">if</span>(<a class="code" href="a00147.h…
760 <a name="l00740"></a>00740 <span class="keywordflow">if</span>(uip_connr->timer-- == 0) {
761 …a name="l00741"></a>00741 <span class="keywordflow">if</span>(uip_connr->nrtx == <a c…
762 …a name="l00742"></a>00742 ((uip_connr->tcpstateflags == <a class="code" href="a001…
763 …a name="l00743"></a>00743 uip_connr->tcpstateflags == <a class="code" href="a001…
764 <a name="l00744"></a>00744 uip_connr->nrtx == <a class="code" href="a00153.html#g2…
765 <a name="l00745"></a>00745 uip_connr->tcpstateflags = <a class="code" href="a00150.h…
766 <a name="l00746"></a>00746
767 <a name="l00747"></a>00747 <span class="comment">/* We call UIP_APPCALL() with uip_flag…
768 <a name="l00748"></a>00748 <span class="comment"> UIP_TIMEDOUT to inform the applicat…
769 <a name="l00749"></a>00749 <span class="comment"> connection has timed out. */</span>
770 …a name="l00750"></a>00750 <a class="code" href="a00150.html#gb4ef6b00924990e7a293f6671…
771 <a name="l00751"></a>00751 <a class="code" href="a00153.html#g41aa744caa46913b3b3aedb2a…
772 <a name="l00752"></a>00752
773 <a name="l00753"></a>00753 <span class="comment">/* We also send a reset packet to the …
774 …a name="l00754"></a>00754 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01…
775 <a name="l00755"></a>00755 <span class="keywordflow">goto</span> tcp_send_nodata;
776 <a name="l00756"></a>00756 }
777 <a name="l00757"></a>00757
778 <a name="l00758"></a>00758 <span class="comment">/* Exponential backoff. */</span>
779 <a name="l00759"></a>00759 uip_connr->timer = <a class="code" href="a00153.html#g15de2…
780 <a name="l00760"></a>00760 4:
781 <a name="l00761"></a>00761 uip_connr->nrtx);
782 <a name="l00762"></a>00762 ++(uip_connr->nrtx);
783 <a name="l00763"></a>00763
784 <a name="l00764"></a>00764 <span class="comment">/* Ok, so we need to retransmit. We do t…
785 <a name="l00765"></a>00765 <span class="comment"> depending on which state we are in. I…
786 <a name="l00766"></a>00766 <span class="comment"> call upon the application so that it …
787 <a name="l00767"></a>00767 <span class="comment"> data for the retransmit. In SYN_RCVD,…
788 <a name="l00768"></a>00768 <span class="comment"> SYNACK that we sent earlier and in LA…
789 <a name="l00769"></a>00769 <span class="comment"> retransmit our FINACK. */</span>
790 …a name="l00770"></a>00770 <a class="code" href="a00150.html#g9c0814ed491fa452ec97910c072…
791 …a name="l00771"></a>00771 <span class="keywordflow">switch</span>(uip_connr->tcpstate…
792 …a name="l00772"></a>00772 <span class="keywordflow">case</span> <a class="code" href="a0…
793 <a name="l00773"></a>00773 <span class="comment">/* In the SYN_RCVD state, we should re…
794 <a name="l00774"></a>00774 <span class="comment"> SYNACK. */</span>
795 <a name="l00775"></a>00775 <span class="keywordflow">goto</span> tcp_send_synack;
796 <a name="l00776"></a>00776
797 <a name="l00777"></a>00777 <span class="preprocessor">#if UIP_ACTIVE_OPEN</span>
798 …a name="l00778"></a>00778 <span class="preprocessor"></span> <span class="keywordflow">ca…
799 <a name="l00779"></a>00779 <span class="comment">/* In the SYN_SENT state, we retransmi…
800 <a name="l00780"></a>00780 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01…
801 <a name="l00781"></a>00781 <span class="keywordflow">goto</span> tcp_send_syn;
802 <a name="l00782"></a>00782 <span class="preprocessor">#endif </span><span class="comment">/* UIP_AC…
803 <a name="l00783"></a>00783
804 …a name="l00784"></a>00784 <span class="keywordflow">case</span> <a class="code" href="a0…
805 <a name="l00785"></a>00785 <span class="comment">/* In the ESTABLISHED state, we call u…
806 <a name="l00786"></a>00786 <span class="comment"> to do the actual retransmit after w…
807 <a name="l00787"></a>00787 <span class="comment"> the code for sending out the packet…
808 <a name="l00788"></a>00788 <span class="comment"> label). */</span>
809 …a name="l00789"></a>00789 <a class="code" href="a00150.html#gb4ef6b00924990e7a293f6671…
810 <a name="l00790"></a>00790 <a class="code" href="a00153.html#g41aa744caa46913b3b3aedb2a…
811 <a name="l00791"></a>00791 <span class="keywordflow">goto</span> apprexmit;
812 <a name="l00792"></a>00792
813 …a name="l00793"></a>00793 <span class="keywordflow">case</span> <a class="code" href="a0…
814 …a name="l00794"></a>00794 <span class="keywordflow">case</span> <a class="code" href="a0…
815 …a name="l00795"></a>00795 <span class="keywordflow">case</span> <a class="code" href="a0…
816 <a name="l00796"></a>00796 <span class="comment">/* In all these states we should retra…
817 <a name="l00797"></a>00797 <span class="keywordflow">goto</span> tcp_send_finack;
818 <a name="l00798"></a>00798
819 <a name="l00799"></a>00799 }
820 <a name="l00800"></a>00800 }
821 …a name="l00801"></a>00801 } <span class="keywordflow">else</span> <span class="keywordflow">…
822 <a name="l00802"></a>00802 <span class="comment">/* If there was no need for a retransmissi…
823 <a name="l00803"></a>00803 <span class="comment"> application for new data. */</span>
824 …a name="l00804"></a>00804 <a class="code" href="a00150.html#gb4ef6b00924990e7a293f66715b6d…
825 <a name="l00805"></a>00805 <a class="code" href="a00153.html#g41aa744caa46913b3b3aedb2a4e78…
826 <a name="l00806"></a>00806 <span class="keywordflow">goto</span> appsend;
827 <a name="l00807"></a>00807 }
828 <a name="l00808"></a>00808 }
829 <a name="l00809"></a>00809 <span class="keywordflow">goto</span> drop;
830 <a name="l00810"></a>00810 }
831 <a name="l00811"></a>00811 <span class="preprocessor">#if UIP_UDP</span>
832 …a name="l00812"></a>00812 <span class="preprocessor"></span> <span class="keywordflow">if</span>(…
833 <a name="l00813"></a>00813 <span class="keywordflow">if</span>(<a class="code" href="a00095.htm…
834 …a name="l00814"></a>00814 <a class="code" href="a00088.html">uip_conn</a> = <a class="code" …
835 …a name="l00815"></a>00815 <a class="code" href="a00150.html#ga05a3dde2048480fa3ab2a5961898d1…
836 …a name="l00816"></a>00816 <a class="code" href="a00149.html#g12a33f0c09711167bdf3dd7d7cf8c5a…
837 …a name="l00817"></a>00817 <a class="code" href="a00150.html#gb4ef6b00924990e7a293f66715b6d1d…
838 <a name="l00818"></a>00818 <a class="code" href="a00160.html#g3d768e989e308144190ae1a5ddfa972…
839 <a name="l00819"></a>00819 <span class="keywordflow">goto</span> udp_send;
840 <a name="l00820"></a>00820 } <span class="keywordflow">else</span> {
841 <a name="l00821"></a>00821 <span class="keywordflow">goto</span> drop;
842 <a name="l00822"></a>00822 }
843 <a name="l00823"></a>00823 }
844 <a name="l00824"></a>00824 <span class="preprocessor">#endif</span>
845 <a name="l00825"></a>00825 <span class="preprocessor"></span>
846 <a name="l00826"></a>00826 <span class="comment">/* This is where the input processing starts. */…
847 …a name="l00827"></a>00827 <a class="code" href="a00150.html#g9c0814ed491fa452ec97910c0728d410">U…
848 <a name="l00828"></a>00828
849 <a name="l00829"></a>00829 <span class="comment">/* Start of IP input header processing code. */<…
850 <a name="l00830"></a>00830
851 <a name="l00831"></a>00831 <span class="preprocessor">#if UIP_CONF_IPV6</span>
852 <a name="l00832"></a>00832 <span class="preprocessor"></span> <span class="comment">/* Check valid…
853 <a name="l00833"></a>00833 <span class="keywordflow">if</span>((<a class="code" href="a00150.html…
854 …a name="l00834"></a>00834 <a class="code" href="a00150.html#g9c0814ed491fa452ec97910c0728d410"…
855 …a name="l00835"></a>00835 <a class="code" href="a00150.html#g9c0814ed491fa452ec97910c0728d410"…
856 <a name="l00836"></a>00836 <a class="code" href="a00150.html#g013c3a06a8b58589a77f4a3442f89c2a"…
857 <a name="l00837"></a>00837 <span class="keywordflow">goto</span> drop;
858 <a name="l00838"></a>00838 }
859 <a name="l00839"></a>00839 <span class="preprocessor">#else </span><span class="comment">/* UIP_CON…
860 <a name="l00840"></a>00840 <span class="comment">/* Check validity of the IP header. */</span>
861 <a name="l00841"></a>00841 <span class="keywordflow">if</span>(<a class="code" href="a00150.html#…
862 …a name="l00842"></a>00842 <a class="code" href="a00150.html#g9c0814ed491fa452ec97910c0728d410"…
863 …a name="l00843"></a>00843 <a class="code" href="a00150.html#g9c0814ed491fa452ec97910c0728d410"…
864 <a name="l00844"></a>00844 <a class="code" href="a00150.html#g013c3a06a8b58589a77f4a3442f89c2a"…
865 <a name="l00845"></a>00845 <span class="keywordflow">goto</span> drop;
866 <a name="l00846"></a>00846 }
867 <a name="l00847"></a>00847 <span class="preprocessor">#endif </span><span class="comment">/* UIP_CO…
868 <a name="l00848"></a>00848
869 <a name="l00849"></a>00849 <span class="comment">/* Check the size of the packet. If the size rep…
870 <a name="l00850"></a>00850 <span class="comment"> uip_len is smaller the size reported in the I…
871 <a name="l00851"></a>00851 <span class="comment"> that the packet has been corrupted in transit…
872 <a name="l00852"></a>00852 <span class="comment"> uip_len is larger than the size reported in t…
873 <a name="l00853"></a>00853 <span class="comment"> the packet has been padded and we set uip_len…
874 <a name="l00854"></a>00854 <span class="comment"> value.. */</span>
875 <a name="l00855"></a>00855
876 …a name="l00856"></a>00856 <span class="keywordflow">if</span>((<a class="code" href="a00150.html…
877 …a name="l00857"></a>00857 <a class="code" href="a00149.html#g12a33f0c09711167bdf3dd7d7cf8c5a1"…
878 <a name="l00858"></a>00858 #<span class="keywordflow">if</span> UIP_CONF_IPV6
879 <a name="l00859"></a>00859 <a class="code" href="a00149.html#g12a33f0c09711167bdf3dd7d7cf8c5a1"…
880 <a name="l00860"></a>00860 <span class="comment"> length of the payload that f…
881 <a name="l00861"></a>00861 <span class="comment"> header. However, uIP uses th…
882 <a name="l00862"></a>00862 <span class="comment"> for holding the size of the …
883 <a name="l00863"></a>00863 <span class="comment"> including the IP header. For…
884 <a name="l00864"></a>00864 <span class="comment"> problem as the length field …
885 <a name="l00865"></a>00865 <span class="comment"> contains the length of the e…
886 <a name="l00866"></a>00866 <span class="comment"> for IPv6 we need to add the …
887 <a name="l00867"></a>00867 <span class="comment"> header (40 bytes). */</span>
888 <a name="l00868"></a>00868 #endif <span class="comment">/* UIP_CONF_IPV6 */</span>
889 <a name="l00869"></a>00869 } <span class="keywordflow">else</span> {
890 <a name="l00870"></a>00870 <a class="code" href="a00150.html#g013c3a06a8b58589a77f4a3442f89c2a"…
891 <a name="l00871"></a>00871 <span class="keywordflow">goto</span> drop;
892 <a name="l00872"></a>00872 }
893 <a name="l00873"></a>00873
894 <a name="l00874"></a>00874 <span class="preprocessor">#if !UIP_CONF_IPV6</span>
895 <a name="l00875"></a>00875 <span class="preprocessor"></span> <span class="comment">/* Check the f…
896 <a name="l00876"></a>00876 <span class="keywordflow">if</span>((<a class="code" href="a00150.html…
897 <a name="l00877"></a>00877 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0…
898 <a name="l00878"></a>00878 <span class="preprocessor">#if UIP_REASSEMBLY</span>
899 <a name="l00879"></a>00879 <span class="preprocessor"></span> <a class="code" href="a00149.html#…
900 <a name="l00880"></a>00880 <span class="keywordflow">if</span>(<a class="code" href="a00149.htm…
901 <a name="l00881"></a>00881 <span class="keywordflow">goto</span> drop;
902 <a name="l00882"></a>00882 }
903 <a name="l00883"></a>00883 <span class="preprocessor">#else </span><span class="comment">/* UIP_REA…
904 …a name="l00884"></a>00884 <a class="code" href="a00150.html#g9c0814ed491fa452ec97910c0728d410"…
905 …a name="l00885"></a>00885 <a class="code" href="a00150.html#g9c0814ed491fa452ec97910c0728d410"…
906 <a name="l00886"></a>00886 <a class="code" href="a00150.html#g013c3a06a8b58589a77f4a3442f89c2a"…
907 <a name="l00887"></a>00887 <span class="keywordflow">goto</span> drop;
908 <a name="l00888"></a>00888 <span class="preprocessor">#endif </span><span class="comment">/* UIP_RE…
909 <a name="l00889"></a>00889 }
910 <a name="l00890"></a>00890 <span class="preprocessor">#endif </span><span class="comment">/* UIP_CO…
911 <a name="l00891"></a>00891
912 …a name="l00892"></a>00892 <span class="keywordflow">if</span>(<a class="code" href="a00148.html#…
913 <a name="l00893"></a>00893 <span class="comment">/* If we are configured to use ping IP address…
914 <a name="l00894"></a>00894 <span class="comment"> hasn't been assigned an IP address yet, we …
915 <a name="l00895"></a>00895 <span class="comment"> packets. */</span>
916 <a name="l00896"></a>00896 <span class="preprocessor">#if UIP_PINGADDRCONF && !UIP_CONF_IPV…
917 …a name="l00897"></a>00897 <span class="preprocessor"></span> <span class="keywordflow">if</span…
918 <a name="l00898"></a>00898 <a class="code" href="a00150.html#g013c3a06a8b58589a77f4a3442f89c2…
919 <a name="l00899"></a>00899 <span class="keywordflow">goto</span> icmp_input;
920 <a name="l00900"></a>00900 } <span class="keywordflow">else</span> {
921 <a name="l00901"></a>00901 <a class="code" href="a00150.html#g013c3a06a8b58589a77f4a3442f89c2…
922 <a name="l00902"></a>00902 <span class="keywordflow">goto</span> drop;
923 <a name="l00903"></a>00903 }
924 <a name="l00904"></a>00904 <span class="preprocessor">#endif </span><span class="comment">/* UIP_PI…
925 <a name="l00905"></a>00905
926 <a name="l00906"></a>00906 } <span class="keywordflow">else</span> {
927 <a name="l00907"></a>00907 <span class="comment">/* If IP broadcast support is configured, we c…
928 <a name="l00908"></a>00908 <span class="comment"> UDP packet, which may be destined to us. */…
929 <a name="l00909"></a>00909 <span class="preprocessor">#if UIP_BROADCAST</span>
930 …a name="l00910"></a>00910 <span class="preprocessor"></span> <a class="code" href="a00135.html#…
931 …a name="l00911"></a>00911 <span class="keywordflow">if</span>(<a class="code" href="a00150.htm…
932 …a name="l00912"></a>00912 <a class="code" href="a00148.html#g210e629f7252e4bc8458cbdf260b33…
933 <a name="l00913"></a>00913 <span class="comment">/*&&</span>
934 <a name="l00914"></a>00914 <span class="comment"> uip_ipchksum() == 0xffff*/</span>) {
935 <a name="l00915"></a>00915 <span class="keywordflow">goto</span> udp_input;
936 <a name="l00916"></a>00916 }
937 <a name="l00917"></a>00917 <span class="preprocessor">#endif </span><span class="comment">/* UIP_BR…
938 <a name="l00918"></a>00918
939 <a name="l00919"></a>00919 <span class="comment">/* Check if the packet is destined for our IP …
940 <a name="l00920"></a>00920 <span class="preprocessor">#if !UIP_CONF_IPV6</span>
941 …a name="l00921"></a>00921 <span class="preprocessor"></span> <span class="keywordflow">if</span…
942 …a name="l00922"></a>00922 <a class="code" href="a00150.html#g9c0814ed491fa452ec97910c0728d41…
943 <a name="l00923"></a>00923 <span class="keywordflow">goto</span> drop;
944 <a name="l00924"></a>00924 }
945 <a name="l00925"></a>00925 <span class="preprocessor">#else </span><span class="comment">/* UIP_CON…
946 <a name="l00926"></a>00926 <span class="comment">/* For IPv6, packet reception is a little tric…
947 <a name="l00927"></a>00927 <span class="comment"> make sure that we listen to certain multica…
948 <a name="l00928"></a>00928 <span class="comment"> hosts multicast address, and the solicited-…
949 <a name="l00929"></a>00929 <span class="comment"> address) as well. However, we will cheat he…
950 <a name="l00930"></a>00930 <span class="comment"> multicast packets that are sent to the ff02…
951 …a name="l00931"></a>00931 <span class="keywordflow">if</span>(!<a class="code" href="a00148.ht…
952 …a name="l00932"></a>00932 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bd…
953 …a name="l00933"></a>00933 <a class="code" href="a00150.html#g9c0814ed491fa452ec97910c0728d41…
954 <a name="l00934"></a>00934 <span class="keywordflow">goto</span> drop;
955 <a name="l00935"></a>00935 }
956 <a name="l00936"></a>00936 <span class="preprocessor">#endif </span><span class="comment">/* UIP_CO…
957 <a name="l00937"></a>00937 }
958 <a name="l00938"></a>00938
959 <a name="l00939"></a>00939 <span class="preprocessor">#if !UIP_CONF_IPV6</span>
960 …a name="l00940"></a>00940 <span class="preprocessor"></span> <span class="keywordflow">if</span>(…
961 <a name="l00941"></a>00941 <span class="comment"> checksum. */</…
962 …a name="l00942"></a>00942 <a class="code" href="a00150.html#g9c0814ed491fa452ec97910c0728d410"…
963 …a name="l00943"></a>00943 <a class="code" href="a00150.html#g9c0814ed491fa452ec97910c0728d410"…
964 <a name="l00944"></a>00944 <a class="code" href="a00150.html#g013c3a06a8b58589a77f4a3442f89c2a"…
965 <a name="l00945"></a>00945 <span class="keywordflow">goto</span> drop;
966 <a name="l00946"></a>00946 }
967 <a name="l00947"></a>00947 <span class="preprocessor">#endif </span><span class="comment">/* UIP_CO…
968 <a name="l00948"></a>00948
969 …a name="l00949"></a>00949 <span class="keywordflow">if</span>(<a class="code" href="a00150.html#…
970 <a name="l00950"></a>00950 <span class="comment"> proceed wit…
971 <a name="l00951"></a>00951 <span class="comment"> processing.…
972 <a name="l00952"></a>00952 <span class="keywordflow">goto</span> tcp_input;
973 <a name="l00953"></a>00953 }
974 <a name="l00954"></a>00954
975 <a name="l00955"></a>00955 <span class="preprocessor">#if UIP_UDP</span>
976 …a name="l00956"></a>00956 <span class="preprocessor"></span> <span class="keywordflow">if</span>(…
977 <a name="l00957"></a>00957 <span class="keywordflow">goto</span> udp_input;
978 <a name="l00958"></a>00958 }
979 <a name="l00959"></a>00959 <span class="preprocessor">#endif </span><span class="comment">/* UIP_UD…
980 <a name="l00960"></a>00960
981 <a name="l00961"></a>00961 <span class="preprocessor">#if !UIP_CONF_IPV6</span>
982 <a name="l00962"></a>00962 <span class="preprocessor"></span> <span class="comment">/* ICMPv4 proc…
983 …a name="l00963"></a>00963 <span class="keywordflow">if</span>(<a class="code" href="a00150.html#…
984 <a name="l00964"></a>00964 <span class="comment"> here. */</…
985 …a name="l00965"></a>00965 <a class="code" href="a00150.html#g9c0814ed491fa452ec97910c0728d410"…
986 …a name="l00966"></a>00966 <a class="code" href="a00150.html#g9c0814ed491fa452ec97910c0728d410"…
987 <a name="l00967"></a>00967 <a class="code" href="a00150.html#g013c3a06a8b58589a77f4a3442f89c2a"…
988 <a name="l00968"></a>00968 <span class="keywordflow">goto</span> drop;
989 <a name="l00969"></a>00969 }
990 <a name="l00970"></a>00970
991 <a name="l00971"></a>00971 <span class="preprocessor">#if UIP_PINGADDRCONF</span>
992 <a name="l00972"></a>00972 <span class="preprocessor"></span> icmp_input:
993 <a name="l00973"></a>00973 <span class="preprocessor">#endif </span><span class="comment">/* UIP_PI…
994 …a name="l00974"></a>00974 <a class="code" href="a00150.html#g9c0814ed491fa452ec97910c0728d410">U…
995 <a name="l00975"></a>00975
996 <a name="l00976"></a>00976 <span class="comment">/* ICMP echo (i.e., ping) processing. This is si…
997 <a name="l00977"></a>00977 <span class="comment"> the ICMP type from ECHO to ECHO_REPLY and adj…
998 <a name="l00978"></a>00978 <span class="comment"> checksum before we return the packet. */</spa…
999 …a name="l00979"></a>00979 <span class="keywordflow">if</span>(<a class="code" href="a00150.html#…
1000 …a name="l00980"></a>00980 <a class="code" href="a00150.html#g9c0814ed491fa452ec97910c0728d410"…
1001 …a name="l00981"></a>00981 <a class="code" href="a00150.html#g9c0814ed491fa452ec97910c0728d410"…
1002 <a name="l00982"></a>00982 <a class="code" href="a00150.html#g013c3a06a8b58589a77f4a3442f89c2a"…
1003 <a name="l00983"></a>00983 <span class="keywordflow">goto</span> drop;
1004 <a name="l00984"></a>00984 }
1005 <a name="l00985"></a>00985
1006 <a name="l00986"></a>00986 <span class="comment">/* If we are configured to use ping IP address a…
1007 <a name="l00987"></a>00987 <span class="comment"> the destination IP address of this ping packe…
1008 <a name="l00988"></a>00988 <span class="comment"> ourself. */</span>
1009 <a name="l00989"></a>00989 <span class="preprocessor">#if UIP_PINGADDRCONF</span>
1010 …a name="l00990"></a>00990 <span class="preprocessor"></span> <span class="keywordflow">if</span>(…
1011 …a name="l00991"></a>00991 <a class="code" href="a00150.html#g7d3673f52f5846b6961d23b150decd54"…
1012 …a name="l00992"></a>00992 <a class="code" href="a00150.html#g7d3673f52f5846b6961d23b150decd54"…
1013 <a name="l00993"></a>00993 }
1014 <a name="l00994"></a>00994 <span class="preprocessor">#endif </span><span class="comment">/* UIP_PI…
1015 <a name="l00995"></a>00995
1016 …a name="l00996"></a>00996 <a class="code" href="a00150.html#g4309376690872fa4beb4f025f5cc199b">I…
1017 <a name="l00997"></a>00997
1018 …a name="l00998"></a>00998 <span class="keywordflow">if</span>(<a class="code" href="a00150.html#…
1019 …a name="l00999"></a>00999 <a class="code" href="a00150.html#g4309376690872fa4beb4f025f5cc199b"…
1020 <a name="l01000"></a>01000 } <span class="keywordflow">else</span> {
1021 …a name="l01001"></a>01001 <a class="code" href="a00150.html#g4309376690872fa4beb4f025f5cc199b"…
1022 <a name="l01002"></a>01002 }
1023 <a name="l01003"></a>01003
1024 <a name="l01004"></a>01004 <span class="comment">/* Swap IP addresses. */</span>
1025 …a name="l01005"></a>01005 <a class="code" href="a00148.html#g769512993b7b27271909d6daa4748b60">u…
1026 …a name="l01006"></a>01006 <a class="code" href="a00148.html#g769512993b7b27271909d6daa4748b60">u…
1027 <a name="l01007"></a>01007
1028 …a name="l01008"></a>01008 <a class="code" href="a00150.html#g9c0814ed491fa452ec97910c0728d410">U…
1029 <a name="l01009"></a>01009 <span class="keywordflow">goto</span> send;
1030 <a name="l01010"></a>01010
1031 <a name="l01011"></a>01011 <span class="comment">/* End of IPv4 input header processing code. */<…
1032 <a name="l01012"></a>01012 <span class="preprocessor">#else </span><span class="comment">/* !UIP_CO…
1033 <a name="l01013"></a>01013
1034 <a name="l01014"></a>01014 <span class="comment">/* This is IPv6 ICMPv6 processing code. */</span>
1035 …a name="l01015"></a>01015 <a class="code" href="a00135.html#534d9e416324fb8ecca6b9cb4b1f6a6a">DE…
1036 <a name="l01016"></a>01016
1037 …a name="l01017"></a>01017 <span class="keywordflow">if</span>(<a class="code" href="a00150.html#…
1038 <a name="l01018"></a>01018 <span class="comment"> here. */<…
1039 …a name="l01019"></a>01019 <a class="code" href="a00150.html#g9c0814ed491fa452ec97910c0728d410"…
1040 …a name="l01020"></a>01020 <a class="code" href="a00150.html#g9c0814ed491fa452ec97910c0728d410"…
1041 <a name="l01021"></a>01021 <a class="code" href="a00150.html#g013c3a06a8b58589a77f4a3442f89c2a"…
1042 <a name="l01022"></a>01022 <span class="keywordflow">goto</span> drop;
1043 <a name="l01023"></a>01023 }
1044 <a name="l01024"></a>01024
1045 …a name="l01025"></a>01025 <a class="code" href="a00150.html#g9c0814ed491fa452ec97910c0728d410">U…
1046 <a name="l01026"></a>01026
1047 <a name="l01027"></a>01027 <span class="comment">/* If we get a neighbor solicitation for our add…
1048 <a name="l01028"></a>01028 <span class="comment"> a neighbor advertisement message back. */</sp…
1049 …a name="l01029"></a>01029 <span class="keywordflow">if</span>(<a class="code" href="a00150.html#…
1050 …a name="l01030"></a>01030 <span class="keywordflow">if</span>(<a class="code" href="a00148.htm…
1051 <a name="l01031"></a>01031
1052 …a name="l01032"></a>01032 <span class="keywordflow">if</span>(<a class="code" href="a00150.h…
1053 <a name="l01033"></a>01033 <span class="comment">/* Save the sender's address in our neighb…
1054 …a name="l01034"></a>01034 <a class="code" href="a00132.html#88460bea09a462d0e22511cb567eee…
1055 <a name="l01035"></a>01035 }
1056 <a name="l01036"></a>01036
1057 <a name="l01037"></a>01037 <span class="comment">/* We should now send a neighbor advertiseme…
1058 <a name="l01038"></a>01038 <span class="comment"> neighbor solicication came from. */</span>
1059 …a name="l01039"></a>01039 <a class="code" href="a00150.html#g4309376690872fa4beb4f025f5cc199…
1060 …a name="l01040"></a>01040 <a class="code" href="a00150.html#g4309376690872fa4beb4f025f5cc199…
1061 <a name="l01041"></a>01041
1062 …a name="l01042"></a>01042 <a class="code" href="a00150.html#g4309376690872fa4beb4f025f5cc199…
1063 <a name="l01043"></a>01043
1064 …a name="l01044"></a>01044 <a class="code" href="a00148.html#g769512993b7b27271909d6daa4748b6…
1065 …a name="l01045"></a>01045 <a class="code" href="a00148.html#g769512993b7b27271909d6daa4748b6…
1066 …a name="l01046"></a>01046 <a class="code" href="a00150.html#g4309376690872fa4beb4f025f5cc199…
1067 <a name="l01047"></a>01047 <a class="code" href="a00150.html#g4309376690872fa4beb4f025f5cc199…
1068 …a name="l01048"></a>01048 memcpy(&(<a class="code" href="a00150.html#g4309376690872fa4be…
1069 <a name="l01049"></a>01049 <a class="code" href="a00150.html#g4309376690872fa4beb4f025f5cc199…
1070 <a name="l01050"></a>01050 <a class="code" href="a00150.html#g4309376690872fa4beb4f025f5cc199…
1071 <a name="l01051"></a>01051 <span class="keywordflow">goto</span> send;
1072 <a name="l01052"></a>01052
1073 <a name="l01053"></a>01053 }
1074 <a name="l01054"></a>01054 <span class="keywordflow">goto</span> drop;
1075 …a name="l01055"></a>01055 } <span class="keywordflow">else</span> <span class="keywordflow">if</…
1076 <a name="l01056"></a>01056 <span class="comment">/* ICMP echo (i.e., ping) processing. This is …
1077 <a name="l01057"></a>01057 <span class="comment"> change the ICMP type from ECHO to ECHO_REPL…
1078 <a name="l01058"></a>01058 <span class="comment"> ICMP checksum before we return the packet. …
1079 <a name="l01059"></a>01059
1080 …a name="l01060"></a>01060 <a class="code" href="a00150.html#g4309376690872fa4beb4f025f5cc199b"…
1081 <a name="l01061"></a>01061
1082 …a name="l01062"></a>01062 <a class="code" href="a00148.html#g769512993b7b27271909d6daa4748b60"…
1083 …a name="l01063"></a>01063 <a class="code" href="a00148.html#g769512993b7b27271909d6daa4748b60"…
1084 <a name="l01064"></a>01064 <a class="code" href="a00150.html#g4309376690872fa4beb4f025f5cc199b"…
1085 <a name="l01065"></a>01065 <a class="code" href="a00150.html#g4309376690872fa4beb4f025f5cc199b"…
1086 <a name="l01066"></a>01066
1087 …a name="l01067"></a>01067 <a class="code" href="a00150.html#g9c0814ed491fa452ec97910c0728d410"…
1088 <a name="l01068"></a>01068 <span class="keywordflow">goto</span> send;
1089 <a name="l01069"></a>01069 } <span class="keywordflow">else</span> {
1090 …a name="l01070"></a>01070 <a class="code" href="a00135.html#534d9e416324fb8ecca6b9cb4b1f6a6a">…
1091 …a name="l01071"></a>01071 <a class="code" href="a00150.html#g9c0814ed491fa452ec97910c0728d410"…
1092 …a name="l01072"></a>01072 <a class="code" href="a00150.html#g9c0814ed491fa452ec97910c0728d410"…
1093 <a name="l01073"></a>01073 <a class="code" href="a00150.html#g013c3a06a8b58589a77f4a3442f89c2a"…
1094 <a name="l01074"></a>01074 <span class="keywordflow">goto</span> drop;
1095 <a name="l01075"></a>01075 }
1096 <a name="l01076"></a>01076
1097 <a name="l01077"></a>01077 <span class="comment">/* End of IPv6 ICMP processing. */</span>
1098 <a name="l01078"></a>01078
1099 <a name="l01079"></a>01079 <span class="preprocessor">#endif </span><span class="comment">/* !UIP_C…
1100 <a name="l01080"></a>01080
1101 <a name="l01081"></a>01081 <span class="preprocessor">#if UIP_UDP</span>
1102 <a name="l01082"></a>01082 <span class="preprocessor"></span> <span class="comment">/* UDP input p…
1103 <a name="l01083"></a>01083 udp_input:
1104 <a name="l01084"></a>01084 <span class="comment">/* UDP processing is really just a hack. We don'…
1105 <a name="l01085"></a>01085 <span class="comment"> UDP/IP headers, but let the UDP application d…
1106 <a name="l01086"></a>01086 <span class="comment"> work. If the application sets uip_slen, it ha…
1107 <a name="l01087"></a>01087 <span class="comment"> send. */</span>
1108 <a name="l01088"></a>01088 <span class="preprocessor">#if UIP_UDP_CHECKSUMS</span>
1109 …a name="l01089"></a>01089 <span class="preprocessor"></span> <a class="code" href="a00149.html#g1…
1110 …a name="l01090"></a>01090 <a class="code" href="a00150.html#g561b8eda32e059d4e7397f776268cc63">u…
1111 …a name="l01091"></a>01091 <span class="keywordflow">if</span>(<a class="code" href="a00150.html#…
1112 …a name="l01092"></a>01092 <a class="code" href="a00150.html#g9c0814ed491fa452ec97910c0728d410"…
1113 …a name="l01093"></a>01093 <a class="code" href="a00150.html#g9c0814ed491fa452ec97910c0728d410"…
1114 <a name="l01094"></a>01094 <a class="code" href="a00150.html#g013c3a06a8b58589a77f4a3442f89c2a"…
1115 <a name="l01095"></a>01095 <span class="keywordflow">goto</span> drop;
1116 <a name="l01096"></a>01096 }
1117 <a name="l01097"></a>01097 <span class="preprocessor">#else </span><span class="comment">/* UIP_UDP…
1118 …a name="l01098"></a>01098 <a class="code" href="a00149.html#g12a33f0c09711167bdf3dd7d7cf8c5a1">u…
1119 <a name="l01099"></a>01099 <span class="preprocessor">#endif </span><span class="comment">/* UIP_UD…
1120 <a name="l01100"></a>01100
1121 <a name="l01101"></a>01101 <span class="comment">/* Demultiplex this UDP packet between the UDP "…
1122 …a name="l01102"></a>01102 <span class="keywordflow">for</span>(<a class="code" href="a00095.html…
1123 …a name="l01103"></a>01103 <a class="code" href="a00095.html">uip_udp_conn</a> < &<a c…
1124 <a name="l01104"></a>01104 ++<a class="code" href="a00095.html">uip_udp_conn</a>) {
1125 <a name="l01105"></a>01105 <span class="comment">/* If the local UDP port is non-zero, the conn…
1126 <a name="l01106"></a>01106 <span class="comment"> to be used. If so, the local port number is…
1127 <a name="l01107"></a>01107 <span class="comment"> destination port number in the received pac…
1128 <a name="l01108"></a>01108 <span class="comment"> numbers match, the remote port number is ch…
1129 <a name="l01109"></a>01109 <span class="comment"> connection is bound to a remote port. Final…
1130 <a name="l01110"></a>01110 <span class="comment"> connection is bound to a remote IP address,…
1131 <a name="l01111"></a>01111 <span class="comment"> address of the packet is checked. */</span>
1132 <a name="l01112"></a>01112 <span class="keywordflow">if</span>(<a class="code" href="a00095.htm…
1133 …a name="l01113"></a>01113 <a class="code" href="a00150.html#gb9435261753469accec0c9bf8a5a26…
1134 <a name="l01114"></a>01114 (<a class="code" href="a00095.html">uip_udp_conn</a>->rport ==…
1135 …a name="l01115"></a>01115 <a class="code" href="a00150.html#gb9435261753469accec0c9bf8a5a2…
1136 …a name="l01116"></a>01116 (<a class="code" href="a00148.html#g210e629f7252e4bc8458cbdf260b3…
1137 …a name="l01117"></a>01117 <a class="code" href="a00148.html#g210e629f7252e4bc8458cbdf260b3…
1138 …a name="l01118"></a>01118 <a class="code" href="a00148.html#g210e629f7252e4bc8458cbdf260b3…
1139 <a name="l01119"></a>01119 <span class="keywordflow">goto</span> udp_found;
1140 <a name="l01120"></a>01120 }
1141 <a name="l01121"></a>01121 }
1142 <a name="l01122"></a>01122 <a class="code" href="a00150.html#g013c3a06a8b58589a77f4a3442f89c2a">U…
1143 <a name="l01123"></a>01123 <span class="keywordflow">goto</span> drop;
1144 <a name="l01124"></a>01124
1145 <a name="l01125"></a>01125 udp_found:
1146 …a name="l01126"></a>01126 <a class="code" href="a00088.html">uip_conn</a> = <a class="code" href…
1147 …a name="l01127"></a>01127 <a class="code" href="a00150.html#gb4ef6b00924990e7a293f66715b6d1d1">u…
1148 …a name="l01128"></a>01128 <a class="code" href="a00150.html#ga05a3dde2048480fa3ab2a5961898d18">u…
1149 <a name="l01129"></a>01129 <a class="code" href="a00150.html#g5b5615dc240daed20949c0fded2b4679">u…
1150 <a name="l01130"></a>01130 <a class="code" href="a00160.html#g3d768e989e308144190ae1a5ddfa9726">U…
1151 <a name="l01131"></a>01131 udp_send:
1152 <a name="l01132"></a>01132 <span class="keywordflow">if</span>(<a class="code" href="a00150.html#…
1153 <a name="l01133"></a>01133 <span class="keywordflow">goto</span> drop;
1154 <a name="l01134"></a>01134 }
1155 …a name="l01135"></a>01135 <a class="code" href="a00149.html#g12a33f0c09711167bdf3dd7d7cf8c5a1">u…
1156 <a name="l01136"></a>01136
1157 <a name="l01137"></a>01137 <span class="preprocessor">#if UIP_CONF_IPV6</span>
1158 <a name="l01138"></a>01138 <span class="preprocessor"></span> <span class="comment">/* For IPv6, t…
1159 <a name="l01139"></a>01139 <span class="comment"> length. */</span>
1160 …a name="l01140"></a>01140 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1161 …a name="l01141"></a>01141 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1162 <a name="l01142"></a>01142 <span class="preprocessor">#else </span><span class="comment">/* UIP_CON…
1163 …a name="l01143"></a>01143 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1164 …a name="l01144"></a>01144 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1165 <a name="l01145"></a>01145 <span class="preprocessor">#endif </span><span class="comment">/* UIP_CO…
1166 <a name="l01146"></a>01146
1167 …a name="l01147"></a>01147 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1168 …a name="l01148"></a>01148 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1169 <a name="l01149"></a>01149
1170 …a name="l01150"></a>01150 <a class="code" href="a00150.html#gb9435261753469accec0c9bf8a5a2686">U…
1171 <a name="l01151"></a>01151 <a class="code" href="a00150.html#gb9435261753469accec0c9bf8a5a2686">U…
1172 <a name="l01152"></a>01152
1173 …a name="l01153"></a>01153 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1174 …a name="l01154"></a>01154 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1175 <a name="l01155"></a>01155
1176 …a name="l01156"></a>01156 <a class="code" href="a00148.html#g769512993b7b27271909d6daa4748b60">u…
1177 …a name="l01157"></a>01157 <a class="code" href="a00148.html#g769512993b7b27271909d6daa4748b60">u…
1178 <a name="l01158"></a>01158
1179 …a name="l01159"></a>01159 <a class="code" href="a00150.html#g561b8eda32e059d4e7397f776268cc63">u…
1180 <a name="l01160"></a>01160
1181 <a name="l01161"></a>01161 <span class="preprocessor">#if UIP_UDP_CHECKSUMS</span>
1182 <a name="l01162"></a>01162 <span class="preprocessor"></span> <span class="comment">/* Calculate U…
1183 …a name="l01163"></a>01163 <a class="code" href="a00150.html#gb9435261753469accec0c9bf8a5a2686">U…
1184 <a name="l01164"></a>01164 <span class="keywordflow">if</span>(<a class="code" href="a00150.html#…
1185 <a name="l01165"></a>01165 <a class="code" href="a00150.html#gb9435261753469accec0c9bf8a5a2686"…
1186 <a name="l01166"></a>01166 }
1187 <a name="l01167"></a>01167 <span class="preprocessor">#endif </span><span class="comment">/* UIP_UD…
1188 <a name="l01168"></a>01168
1189 <a name="l01169"></a>01169 <span class="keywordflow">goto</span> ip_send_nolen;
1190 <a name="l01170"></a>01170 <span class="preprocessor">#endif </span><span class="comment">/* UIP_UD…
1191 <a name="l01171"></a>01171
1192 <a name="l01172"></a>01172 <span class="comment">/* TCP input processing. */</span>
1193 <a name="l01173"></a>01173 tcp_input:
1194 …a name="l01174"></a>01174 <a class="code" href="a00150.html#g9c0814ed491fa452ec97910c0728d410">U…
1195 <a name="l01175"></a>01175
1196 <a name="l01176"></a>01176 <span class="comment">/* Start of TCP input header processing code. */…
1197 <a name="l01177"></a>01177
1198 <a name="l01178"></a>01178 <span class="keywordflow">if</span>(<a class="code" href="a00150.html#…
1199 <a name="l01179"></a>01179 <span class="comment"> checksum. *…
1200 …a name="l01180"></a>01180 <a class="code" href="a00150.html#g9c0814ed491fa452ec97910c0728d410"…
1201 …a name="l01181"></a>01181 <a class="code" href="a00150.html#g9c0814ed491fa452ec97910c0728d410"…
1202 <a name="l01182"></a>01182 <a class="code" href="a00150.html#g013c3a06a8b58589a77f4a3442f89c2a"…
1203 <a name="l01183"></a>01183 <span class="keywordflow">goto</span> drop;
1204 <a name="l01184"></a>01184 }
1205 <a name="l01185"></a>01185
1206 <a name="l01186"></a>01186
1207 <a name="l01187"></a>01187 <span class="comment">/* Demultiplex this segment. */</span>
1208 <a name="l01188"></a>01188 <span class="comment">/* First check any active connections. */</span>
1209 …a name="l01189"></a>01189 <span class="keywordflow">for</span>(uip_connr = &<a class="code" …
1210 <a name="l01190"></a>01190 ++uip_connr) {
1211 …a name="l01191"></a>01191 <span class="keywordflow">if</span>(uip_connr->tcpstateflags != <…
1212 <a name="l01192"></a>01192 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bd…
1213 <a name="l01193"></a>01193 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bd…
1214 …a name="l01194"></a>01194 <a class="code" href="a00148.html#g210e629f7252e4bc8458cbdf260b33…
1215 <a name="l01195"></a>01195 <span class="keywordflow">goto</span> found;
1216 <a name="l01196"></a>01196 }
1217 <a name="l01197"></a>01197 }
1218 <a name="l01198"></a>01198
1219 <a name="l01199"></a>01199 <span class="comment">/* If we didn't find and active connection that …
1220 <a name="l01200"></a>01200 <span class="comment"> either this packet is an old duplicate, or th…
1221 <a name="l01201"></a>01201 <span class="comment"> destined for a connection in LISTEN. If the S…
1222 <a name="l01202"></a>01202 <span class="comment"> it is an old packet and we send a RST. */</sp…
1223 …a name="l01203"></a>01203 <span class="keywordflow">if</span>((<a class="code" href="a00150.html…
1224 <a name="l01204"></a>01204 <span class="keywordflow">goto</span> reset;
1225 <a name="l01205"></a>01205 }
1226 <a name="l01206"></a>01206
1227 <a name="l01207"></a>01207 tmp16 = <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be…
1228 <a name="l01208"></a>01208 <span class="comment">/* Next, check listening connections. */</span>
1229 …a name="l01209"></a>01209 <span class="keywordflow">for</span>(c = 0; c < <a class="code" hre…
1230 …a name="l01210"></a>01210 <span class="keywordflow">if</span>(tmp16 == <a class="code" href="a…
1231 <a name="l01211"></a>01211 <span class="keywordflow">goto</span> found_listen;
1232 <a name="l01212"></a>01212 }
1233 <a name="l01213"></a>01213
1234 <a name="l01214"></a>01214 <span class="comment">/* No matching connection found, so we send a RS…
1235 …a name="l01215"></a>01215 <a class="code" href="a00150.html#g9c0814ed491fa452ec97910c0728d410">U…
1236 <a name="l01216"></a>01216 reset:
1237 <a name="l01217"></a>01217
1238 <a name="l01218"></a>01218 <span class="comment">/* We do not send resets in response to resets. …
1239 …a name="l01219"></a>01219 <span class="keywordflow">if</span>(<a class="code" href="a00150.html#…
1240 <a name="l01220"></a>01220 <span class="keywordflow">goto</span> drop;
1241 <a name="l01221"></a>01221 }
1242 <a name="l01222"></a>01222
1243 …a name="l01223"></a>01223 <a class="code" href="a00150.html#g9c0814ed491fa452ec97910c0728d410">U…
1244 <a name="l01224"></a>01224
1245 …a name="l01225"></a>01225 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1246 …a name="l01226"></a>01226 <a class="code" href="a00149.html#g12a33f0c09711167bdf3dd7d7cf8c5a1">u…
1247 <a name="l01227"></a>01227 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1248 <a name="l01228"></a>01228
1249 <a name="l01229"></a>01229 <span class="comment">/* Flip the seqno and ackno fields in the TCP he…
1250 <a name="l01230"></a>01230 c = <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd…
1251 …a name="l01231"></a>01231 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1252 <a name="l01232"></a>01232 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1253 <a name="l01233"></a>01233
1254 <a name="l01234"></a>01234 c = <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd…
1255 …a name="l01235"></a>01235 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1256 <a name="l01236"></a>01236 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1257 <a name="l01237"></a>01237
1258 <a name="l01238"></a>01238 c = <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd…
1259 …a name="l01239"></a>01239 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1260 <a name="l01240"></a>01240 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1261 <a name="l01241"></a>01241
1262 <a name="l01242"></a>01242 c = <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd…
1263 …a name="l01243"></a>01243 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1264 <a name="l01244"></a>01244 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1265 <a name="l01245"></a>01245
1266 <a name="l01246"></a>01246 <span class="comment">/* We also have to increase the sequence number …
1267 <a name="l01247"></a>01247 <span class="comment"> acknowledging. If the least significant byte …
1268 <a name="l01248"></a>01248 <span class="comment"> to propagate the carry to the other bytes as …
1269 <a name="l01249"></a>01249 <span class="keywordflow">if</span>(++<a class="code" href="a00150.htm…
1270 <a name="l01250"></a>01250 <span class="keywordflow">if</span>(++<a class="code" href="a00150.h…
1271 <a name="l01251"></a>01251 <span class="keywordflow">if</span>(++<a class="code" href="a00150…
1272 <a name="l01252"></a>01252 ++<a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be…
1273 <a name="l01253"></a>01253 }
1274 <a name="l01254"></a>01254 }
1275 <a name="l01255"></a>01255 }
1276 <a name="l01256"></a>01256
1277 <a name="l01257"></a>01257 <span class="comment">/* Swap port numbers. */</span>
1278 <a name="l01258"></a>01258 tmp16 = <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be…
1279 …a name="l01259"></a>01259 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1280 <a name="l01260"></a>01260 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1281 <a name="l01261"></a>01261
1282 <a name="l01262"></a>01262 <span class="comment">/* Swap IP addresses. */</span>
1283 …a name="l01263"></a>01263 <a class="code" href="a00148.html#g769512993b7b27271909d6daa4748b60">u…
1284 …a name="l01264"></a>01264 <a class="code" href="a00148.html#g769512993b7b27271909d6daa4748b60">u…
1285 <a name="l01265"></a>01265
1286 <a name="l01266"></a>01266 <span class="comment">/* And send out the RST packet! */</span>
1287 <a name="l01267"></a>01267 <span class="keywordflow">goto</span> tcp_send_noconn;
1288 <a name="l01268"></a>01268
1289 <a name="l01269"></a>01269 <span class="comment">/* This label will be jumped to if we matched th…
1290 <a name="l01270"></a>01270 <span class="comment"> with a connection in LISTEN. In that case, we…
1291 <a name="l01271"></a>01271 <span class="comment"> connection and send a SYNACK in return. */</s…
1292 <a name="l01272"></a>01272 found_listen:
1293 <a name="l01273"></a>01273 <span class="comment">/* First we check if there are any connections a…
1294 <a name="l01274"></a>01274 <span class="comment"> connections are kept in the same table as use…
1295 <a name="l01275"></a>01275 <span class="comment"> unused ones have the tcpstate set to CLOSED. …
1296 <a name="l01276"></a>01276 <span class="comment"> TIME_WAIT are kept track of and we'll use the…
1297 <a name="l01277"></a>01277 <span class="comment"> CLOSED connections are found. Thanks to Eddie…
1298 <a name="l01278"></a>01278 <span class="comment"> nice algorithm for the TIME_WAIT search. */</…
1299 <a name="l01279"></a>01279 uip_connr = 0;
1300 …a name="l01280"></a>01280 <span class="keywordflow">for</span>(c = 0; c < <a class="code" hre…
1301 …a name="l01281"></a>01281 <span class="keywordflow">if</span>(<a class="code" href="a00150.htm…
1302 <a name="l01282"></a>01282 uip_connr = &<a class="code" href="a00150.html#gf703683056d2bf…
1303 <a name="l01283"></a>01283 <span class="keywordflow">break</span>;
1304 <a name="l01284"></a>01284 }
1305 …a name="l01285"></a>01285 <span class="keywordflow">if</span>(<a class="code" href="a00150.htm…
1306 <a name="l01286"></a>01286 <span class="keywordflow">if</span>(uip_connr == 0 ||
1307 …a name="l01287"></a>01287 <a class="code" href="a00150.html#gf703683056d2bfa5c81fa157dcb2…
1308 <a name="l01288"></a>01288 uip_connr = &<a class="code" href="a00150.html#gf703683056d2…
1309 <a name="l01289"></a>01289 }
1310 <a name="l01290"></a>01290 }
1311 <a name="l01291"></a>01291 }
1312 <a name="l01292"></a>01292
1313 <a name="l01293"></a>01293 <span class="keywordflow">if</span>(uip_connr == 0) {
1314 <a name="l01294"></a>01294 <span class="comment">/* All connections are used already, we drop p…
1315 <a name="l01295"></a>01295 <span class="comment"> the remote end will retransmit the packet a…
1316 <a name="l01296"></a>01296 <span class="comment"> have more spare connections. */</span>
1317 …a name="l01297"></a>01297 <a class="code" href="a00150.html#g9c0814ed491fa452ec97910c0728d410"…
1318 <a name="l01298"></a>01298 <a class="code" href="a00150.html#g013c3a06a8b58589a77f4a3442f89c2a"…
1319 <a name="l01299"></a>01299 <span class="keywordflow">goto</span> drop;
1320 <a name="l01300"></a>01300 }
1321 <a name="l01301"></a>01301 <a class="code" href="a00088.html">uip_conn</a> = uip_connr;
1322 <a name="l01302"></a>01302
1323 <a name="l01303"></a>01303 <span class="comment">/* Fill in the necessary fields for the new conn…
1324 <a name="l01304"></a>01304 uip_connr->rto = uip_connr->timer = <a class="code" href="a00153…
1325 <a name="l01305"></a>01305 uip_connr->sa = 0;
1326 <a name="l01306"></a>01306 uip_connr->sv = 4;
1327 <a name="l01307"></a>01307 uip_connr->nrtx = 0;
1328 <a name="l01308"></a>01308 uip_connr->lport = <a class="code" href="a00150.html#g24f52ac52d6e7…
1329 <a name="l01309"></a>01309 uip_connr->rport = <a class="code" href="a00150.html#g24f52ac52d6e7…
1330 …a name="l01310"></a>01310 <a class="code" href="a00148.html#g769512993b7b27271909d6daa4748b60">u…
1331 <a name="l01311"></a>01311 uip_connr->tcpstateflags = <a class="code" href="a00150.html#ga5e3c…
1332 <a name="l01312"></a>01312
1333 <a name="l01313"></a>01313 uip_connr->snd_nxt[0] = iss[0];
1334 <a name="l01314"></a>01314 uip_connr->snd_nxt[1] = iss[1];
1335 <a name="l01315"></a>01315 uip_connr->snd_nxt[2] = iss[2];
1336 <a name="l01316"></a>01316 uip_connr->snd_nxt[3] = iss[3];
1337 <a name="l01317"></a>01317 uip_connr->len = 1;
1338 <a name="l01318"></a>01318
1339 <a name="l01319"></a>01319 <span class="comment">/* rcv_nxt should be the seqno from the incoming…
1340 <a name="l01320"></a>01320 uip_connr->rcv_nxt[3] = <a class="code" href="a00150.html#g24f52ac5…
1341 <a name="l01321"></a>01321 uip_connr->rcv_nxt[2] = <a class="code" href="a00150.html#g24f52ac5…
1342 <a name="l01322"></a>01322 uip_connr->rcv_nxt[1] = <a class="code" href="a00150.html#g24f52ac5…
1343 <a name="l01323"></a>01323 uip_connr->rcv_nxt[0] = <a class="code" href="a00150.html#g24f52ac5…
1344 <a name="l01324"></a>01324 uip_add_rcv_nxt(1);
1345 <a name="l01325"></a>01325
1346 <a name="l01326"></a>01326 <span class="comment">/* Parse the TCP MSS option, if present. */</spa…
1347 <a name="l01327"></a>01327 <span class="keywordflow">if</span>((<a class="code" href="a00150.html…
1348 …a name="l01328"></a>01328 <span class="keywordflow">for</span>(c = 0; c < ((<a class="code"…
1349 …a name="l01329"></a>01329 opt = <a class="code" href="a00146.html#gb81e78f890dbbee50c533a973…
1350 …a name="l01330"></a>01330 <span class="keywordflow">if</span>(opt == <a class="code" href="a…
1351 <a name="l01331"></a>01331 <span class="comment">/* End of options. */</span>
1352 <a name="l01332"></a>01332 <span class="keywordflow">break</span>;
1353 …a name="l01333"></a>01333 } <span class="keywordflow">else</span> <span class="keywordflow">…
1354 <a name="l01334"></a>01334 ++c;
1355 <a name="l01335"></a>01335 <span class="comment">/* NOP option. */</span>
1356 …a name="l01336"></a>01336 } <span class="keywordflow">else</span> <span class="keywordflow">…
1357 …a name="l01337"></a>01337 <a class="code" href="a00146.html#gb81e78f890dbbee50c533…
1358 <a name="l01338"></a>01338 <span class="comment">/* An MSS option with the right option len…
1359 …a name="l01339"></a>01339 tmp16 = ((<a class="code" href="a00153.html#g77570ac4fcab86864fa…
1360 …a name="l01340"></a>01340 (<a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55…
1361 <a name="l01341"></a>01341 uip_connr->initialmss = uip_connr->mss =
1362 …a name="l01342"></a>01342 tmp16 > <a class="code" href="a00153.html#g4910467b83a639f0…
1363 <a name="l01343"></a>01343
1364 <a name="l01344"></a>01344 <span class="comment">/* And we are done processing options. */<…
1365 <a name="l01345"></a>01345 <span class="keywordflow">break</span>;
1366 <a name="l01346"></a>01346 } <span class="keywordflow">else</span> {
1367 <a name="l01347"></a>01347 <span class="comment">/* All other options have a length field, …
1368 <a name="l01348"></a>01348 <span class="comment"> can skip past them. */</span>
1369 …a name="l01349"></a>01349 <span class="keywordflow">if</span>(<a class="code" href="a00146…
1370 <a name="l01350"></a>01350 <span class="comment">/* If the length field is zero, the opti…
1371 <a name="l01351"></a>01351 <span class="comment"> and we don't process them further. */…
1372 <a name="l01352"></a>01352 <span class="keywordflow">break</span>;
1373 <a name="l01353"></a>01353 }
1374 …a name="l01354"></a>01354 c += <a class="code" href="a00146.html#gb81e78f890dbbee50c533a97…
1375 <a name="l01355"></a>01355 }
1376 <a name="l01356"></a>01356 }
1377 <a name="l01357"></a>01357 }
1378 <a name="l01358"></a>01358
1379 <a name="l01359"></a>01359 <span class="comment">/* Our response will be a SYNACK. */</span>
1380 <a name="l01360"></a>01360 <span class="preprocessor">#if UIP_ACTIVE_OPEN</span>
1381 <a name="l01361"></a>01361 <span class="preprocessor"></span> tcp_send_synack:
1382 …a name="l01362"></a>01362 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1383 <a name="l01363"></a>01363
1384 <a name="l01364"></a>01364 tcp_send_syn:
1385 …a name="l01365"></a>01365 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1386 <a name="l01366"></a>01366 <span class="preprocessor">#else </span><span class="comment">/* UIP_ACT…
1387 <a name="l01367"></a>01367 tcp_send_synack:
1388 …a name="l01368"></a>01368 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1389 <a name="l01369"></a>01369 <span class="preprocessor">#endif </span><span class="comment">/* UIP_AC…
1390 <a name="l01370"></a>01370
1391 <a name="l01371"></a>01371 <span class="comment">/* We send out the TCP Maximum Segment Size opti…
1392 <a name="l01372"></a>01372 <span class="comment"> SYNACK. */</span>
1393 …a name="l01373"></a>01373 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1394 …a name="l01374"></a>01374 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1395 …a name="l01375"></a>01375 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1396 …a name="l01376"></a>01376 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1397 …a name="l01377"></a>01377 <a class="code" href="a00149.html#g12a33f0c09711167bdf3dd7d7cf8c5a1">u…
1398 …a name="l01378"></a>01378 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1399 <a name="l01379"></a>01379 <span class="keywordflow">goto</span> tcp_send;
1400 <a name="l01380"></a>01380
1401 <a name="l01381"></a>01381 <span class="comment">/* This label will be jumped to if we found an a…
1402 <a name="l01382"></a>01382 found:
1403 <a name="l01383"></a>01383 <a class="code" href="a00088.html">uip_conn</a> = uip_connr;
1404 <a name="l01384"></a>01384 <a class="code" href="a00150.html#gb4ef6b00924990e7a293f66715b6d1d1">u…
1405 <a name="l01385"></a>01385 <span class="comment">/* We do a very naive form of TCP reset processi…
1406 <a name="l01386"></a>01386 <span class="comment"> any RST and kill our connection. We should in…
1407 <a name="l01387"></a>01387 <span class="comment"> sequence number of this reset is wihtin our a…
1408 <a name="l01388"></a>01388 <span class="comment"> before we accept the reset. */</span>
1409 …a name="l01389"></a>01389 <span class="keywordflow">if</span>(<a class="code" href="a00150.html#…
1410 <a name="l01390"></a>01390 uip_connr->tcpstateflags = <a class="code" href="a00150.html#g28e…
1411 <a name="l01391"></a>01391 <a class="code" href="a00150.html#g013c3a06a8b58589a77f4a3442f89c2a"…
1412 …a name="l01392"></a>01392 <a class="code" href="a00150.html#gb4ef6b00924990e7a293f66715b6d1d1"…
1413 <a name="l01393"></a>01393 <a class="code" href="a00153.html#g41aa744caa46913b3b3aedb2a4e78546"…
1414 <a name="l01394"></a>01394 <span class="keywordflow">goto</span> drop;
1415 <a name="l01395"></a>01395 }
1416 <a name="l01396"></a>01396 <span class="comment">/* Calculated the length of the data, if the app…
1417 <a name="l01397"></a>01397 <span class="comment"> any data to us. */</span>
1418 <a name="l01398"></a>01398 c = (<a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bd…
1419 <a name="l01399"></a>01399 <span class="comment">/* uip_len will contain the length of the actual…
1420 <a name="l01400"></a>01400 <span class="comment"> calculated by subtracing the length of the TC…
1421 <a name="l01401"></a>01401 <span class="comment"> c) and the length of the IP header (20 bytes)…
1422 …a name="l01402"></a>01402 <a class="code" href="a00149.html#g12a33f0c09711167bdf3dd7d7cf8c5a1">u…
1423 <a name="l01403"></a>01403
1424 <a name="l01404"></a>01404 <span class="comment">/* First, check if the sequence number of the in…
1425 <a name="l01405"></a>01405 <span class="comment"> what we're expecting next. If not, we send ou…
1426 <a name="l01406"></a>01406 <span class="comment"> correct numbers in. */</span>
1427 …a name="l01407"></a>01407 <span class="keywordflow">if</span>(!(((uip_connr->tcpstateflags &a…
1428 …a name="l01408"></a>01408 ((<a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3…
1429 …a name="l01409"></a>01409 <span class="keywordflow">if</span>((<a class="code" href="a00149.ht…
1430 <a name="l01410"></a>01410 (<a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3b…
1431 <a name="l01411"></a>01411 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3b…
1432 <a name="l01412"></a>01412 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3b…
1433 <a name="l01413"></a>01413 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3b…
1434 <a name="l01414"></a>01414 <span class="keywordflow">goto</span> tcp_send_ack;
1435 <a name="l01415"></a>01415 }
1436 <a name="l01416"></a>01416 }
1437 <a name="l01417"></a>01417
1438 <a name="l01418"></a>01418 <span class="comment">/* Next, check if the incoming segment acknowled…
1439 <a name="l01419"></a>01419 <span class="comment"> data. If so, we update the sequence number, r…
1440 <a name="l01420"></a>01420 <span class="comment"> the outstanding data, calculate RTT estimatio…
1441 <a name="l01421"></a>01421 <span class="comment"> retransmission timer. */</span>
1442 …a name="l01422"></a>01422 <span class="keywordflow">if</span>((<a class="code" href="a00150.html…
1443 <a name="l01423"></a>01423 <a class="code" href="a00150.html#g6832e4d2d046536b6472f7ac92340f68"…
1444 <a name="l01424"></a>01424
1445 …a name="l01425"></a>01425 <span class="keywordflow">if</span>(<a class="code" href="a00150.htm…
1446 …a name="l01426"></a>01426 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bd…
1447 …a name="l01427"></a>01427 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bd…
1448 …a name="l01428"></a>01428 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bd…
1449 <a name="l01429"></a>01429 <span class="comment">/* Update sequence number. */</span>
1450 <a name="l01430"></a>01430 uip_connr->snd_nxt[0] = <a class="code" href="a00151.html#g2a0c…
1451 <a name="l01431"></a>01431 uip_connr->snd_nxt[1] = <a class="code" href="a00151.html#g2a0c…
1452 <a name="l01432"></a>01432 uip_connr->snd_nxt[2] = <a class="code" href="a00151.html#g2a0c…
1453 <a name="l01433"></a>01433 uip_connr->snd_nxt[3] = <a class="code" href="a00151.html#g2a0c…
1454 <a name="l01434"></a>01434
1455 <a name="l01435"></a>01435
1456 <a name="l01436"></a>01436 <span class="comment">/* Do RTT estimation, unless we have done re…
1457 <a name="l01437"></a>01437 <span class="keywordflow">if</span>(uip_connr->nrtx == 0) {
1458 <a name="l01438"></a>01438 <span class="keywordtype">signed</span> <span class="keywordtype…
1459 <a name="l01439"></a>01439 m = uip_connr->rto - uip_connr->timer;
1460 <a name="l01440"></a>01440 <span class="comment">/* This is taken directly from VJs origina…
1461 <a name="l01441"></a>01441 m = m - (uip_connr->sa >> 3);
1462 <a name="l01442"></a>01442 uip_connr->sa += m;
1463 <a name="l01443"></a>01443 <span class="keywordflow">if</span>(m < 0) {
1464 <a name="l01444"></a>01444 m = -m;
1465 <a name="l01445"></a>01445 }
1466 <a name="l01446"></a>01446 m = m - (uip_connr->sv >> 2);
1467 <a name="l01447"></a>01447 uip_connr->sv += m;
1468 <a name="l01448"></a>01448 uip_connr->rto = (uip_connr->sa >> 3) + uip_connr-&g…
1469 <a name="l01449"></a>01449
1470 <a name="l01450"></a>01450 }
1471 <a name="l01451"></a>01451 <span class="comment">/* Set the acknowledged flag. */</span>
1472 …a name="l01452"></a>01452 <a class="code" href="a00150.html#gb4ef6b00924990e7a293f66715b6d1d…
1473 <a name="l01453"></a>01453 <span class="comment">/* Reset the retransmission timer. */</span>
1474 <a name="l01454"></a>01454 uip_connr->timer = uip_connr->rto;
1475 <a name="l01455"></a>01455
1476 <a name="l01456"></a>01456 <span class="comment">/* Reset length of outstanding data. */</spa…
1477 <a name="l01457"></a>01457 uip_connr->len = 0;
1478 <a name="l01458"></a>01458 }
1479 <a name="l01459"></a>01459
1480 <a name="l01460"></a>01460 }
1481 <a name="l01461"></a>01461
1482 <a name="l01462"></a>01462 <span class="comment">/* Do different things depending on in what stat…
1483 …a name="l01463"></a>01463 <span class="keywordflow">switch</span>(uip_connr->tcpstateflags &a…
1484 <a name="l01464"></a>01464 <span class="comment">/* CLOSED and LISTEN are not handled here. CLO…
1485 <a name="l01465"></a>01465 <span class="comment"> implemented, since we force the applicatio…
1486 <a name="l01466"></a>01466 <span class="comment"> peer sends a FIN (hence the application go…
1487 <a name="l01467"></a>01467 <span class="comment"> ESTABLISHED to LAST_ACK). */</span>
1488 <a name="l01468"></a>01468 <span class="keywordflow">case</span> <a class="code" href="a00150.htm…
1489 <a name="l01469"></a>01469 <span class="comment">/* In SYN_RCVD we have sent out a SYNACK in re…
1490 <a name="l01470"></a>01470 <span class="comment"> we are waiting for an ACK that acknowledges…
1491 <a name="l01471"></a>01471 <span class="comment"> out the last time. Therefore, we want to ha…
1492 <a name="l01472"></a>01472 <span class="comment"> flag set. If so, we enter the ESTABLISHED s…
1493 …a name="l01473"></a>01473 <span class="keywordflow">if</span>(<a class="code" href="a00150.htm…
1494 <a name="l01474"></a>01474 uip_connr->tcpstateflags = <a class="code" href="a00150.html#ga…
1495 …a name="l01475"></a>01475 <a class="code" href="a00150.html#gb4ef6b00924990e7a293f66715b6d1d…
1496 <a name="l01476"></a>01476 uip_connr->len = 0;
1497 <a name="l01477"></a>01477 <span class="keywordflow">if</span>(<a class="code" href="a00149.h…
1498 …a name="l01478"></a>01478 <a class="code" href="a00150.html#gb4ef6b00924990e7a293f66715b6d…
1499 <a name="l01479"></a>01479 uip_add_rcv_nxt(<a class="code" href="a00149.html#g12a33f0c09711…
1500 <a name="l01480"></a>01480 }
1501 <a name="l01481"></a>01481 <a class="code" href="a00150.html#g5b5615dc240daed20949c0fded2b467…
1502 <a name="l01482"></a>01482 <a class="code" href="a00153.html#g41aa744caa46913b3b3aedb2a4e7854…
1503 <a name="l01483"></a>01483 <span class="keywordflow">goto</span> appsend;
1504 <a name="l01484"></a>01484 }
1505 <a name="l01485"></a>01485 <span class="keywordflow">goto</span> drop;
1506 <a name="l01486"></a>01486 <span class="preprocessor">#if UIP_ACTIVE_OPEN</span>
1507 …a name="l01487"></a>01487 <span class="preprocessor"></span> <span class="keywordflow">case</span…
1508 <a name="l01488"></a>01488 <span class="comment">/* In SYN_SENT, we wait for a SYNACK that is s…
1509 <a name="l01489"></a>01489 <span class="comment"> our SYN. The rcv_nxt is set to sequence num…
1510 <a name="l01490"></a>01490 <span class="comment"> plus one, and we send an ACK. We move into …
1511 <a name="l01491"></a>01491 <span class="comment"> state. */</span>
1512 <a name="l01492"></a>01492 <span class="keywordflow">if</span>((<a class="code" href="a00150.ht…
1513 …a name="l01493"></a>01493 (<a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3b…
1514 <a name="l01494"></a>01494
1515 <a name="l01495"></a>01495 <span class="comment">/* Parse the TCP MSS option, if present. */<…
1516 <a name="l01496"></a>01496 <span class="keywordflow">if</span>((<a class="code" href="a00150.…
1517 …a name="l01497"></a>01497 <span class="keywordflow">for</span>(c = 0; c < ((<a class="c…
1518 …a name="l01498"></a>01498 opt = <a class="code" href="a00146.html#gb81e78f890dbbee50c533…
1519 …a name="l01499"></a>01499 <span class="keywordflow">if</span>(opt == <a class="code" hre…
1520 <a name="l01500"></a>01500 <span class="comment">/* End of options. */</span>
1521 <a name="l01501"></a>01501 <span class="keywordflow">break</span>;
1522 …a name="l01502"></a>01502 } <span class="keywordflow">else</span> <span class="keywordfl…
1523 <a name="l01503"></a>01503 ++c;
1524 <a name="l01504"></a>01504 <span class="comment">/* NOP option. */</span>
1525 …a name="l01505"></a>01505 } <span class="keywordflow">else</span> <span class="keywordfl…
1526 …a name="l01506"></a>01506 <a class="code" href="a00146.html#gb81e78f890dbbee50…
1527 <a name="l01507"></a>01507 <span class="comment">/* An MSS option with the right option…
1528 …a name="l01508"></a>01508 tmp16 = (<a class="code" href="a00146.html#gb81e78f890dbbee5…
1529 …a name="l01509"></a>01509 <a class="code" href="a00146.html#gb81e78f890dbbee50c533a9…
1530 <a name="l01510"></a>01510 uip_connr->initialmss =
1531 …a name="l01511"></a>01511 uip_connr->mss = tmp16 > <a class="code" href="a0015…
1532 <a name="l01512"></a>01512
1533 <a name="l01513"></a>01513 <span class="comment">/* And we are done processing options.…
1534 <a name="l01514"></a>01514 <span class="keywordflow">break</span>;
1535 <a name="l01515"></a>01515 } <span class="keywordflow">else</span> {
1536 <a name="l01516"></a>01516 <span class="comment">/* All other options have a length fie…
1537 <a name="l01517"></a>01517 <span class="comment"> can skip past them. */</span>
1538 …a name="l01518"></a>01518 <span class="keywordflow">if</span>(<a class="code" href="a0…
1539 <a name="l01519"></a>01519 <span class="comment">/* If the length field is zero, the …
1540 <a name="l01520"></a>01520 <span class="comment"> and we don't process them further…
1541 <a name="l01521"></a>01521 <span class="keywordflow">break</span>;
1542 <a name="l01522"></a>01522 }
1543 …a name="l01523"></a>01523 c += <a class="code" href="a00146.html#gb81e78f890dbbee50c53…
1544 <a name="l01524"></a>01524 }
1545 <a name="l01525"></a>01525 }
1546 <a name="l01526"></a>01526 }
1547 <a name="l01527"></a>01527 uip_connr->tcpstateflags = <a class="code" href="a00150.html#ga…
1548 <a name="l01528"></a>01528 uip_connr->rcv_nxt[0] = <a class="code" href="a00150.html#g24f5…
1549 <a name="l01529"></a>01529 uip_connr->rcv_nxt[1] = <a class="code" href="a00150.html#g24f5…
1550 <a name="l01530"></a>01530 uip_connr->rcv_nxt[2] = <a class="code" href="a00150.html#g24f5…
1551 <a name="l01531"></a>01531 uip_connr->rcv_nxt[3] = <a class="code" href="a00150.html#g24f5…
1552 <a name="l01532"></a>01532 uip_add_rcv_nxt(1);
1553 …a name="l01533"></a>01533 <a class="code" href="a00150.html#gb4ef6b00924990e7a293f66715b6d1d…
1554 <a name="l01534"></a>01534 uip_connr->len = 0;
1555 <a name="l01535"></a>01535 <a class="code" href="a00149.html#g12a33f0c09711167bdf3dd7d7cf8c5a…
1556 <a name="l01536"></a>01536 <a class="code" href="a00150.html#g5b5615dc240daed20949c0fded2b467…
1557 <a name="l01537"></a>01537 <a class="code" href="a00153.html#g41aa744caa46913b3b3aedb2a4e7854…
1558 <a name="l01538"></a>01538 <span class="keywordflow">goto</span> appsend;
1559 <a name="l01539"></a>01539 }
1560 <a name="l01540"></a>01540 <span class="comment">/* Inform the application that the connection …
1561 …a name="l01541"></a>01541 <a class="code" href="a00150.html#gb4ef6b00924990e7a293f66715b6d1d1"…
1562 <a name="l01542"></a>01542 <a class="code" href="a00153.html#g41aa744caa46913b3b3aedb2a4e78546"…
1563 <a name="l01543"></a>01543 <span class="comment">/* The connection is closed after we send the …
1564 …a name="l01544"></a>01544 <a class="code" href="a00088.html">uip_conn</a>->tcpstateflags = …
1565 <a name="l01545"></a>01545 <span class="keywordflow">goto</span> reset;
1566 <a name="l01546"></a>01546 <span class="preprocessor">#endif </span><span class="comment">/* UIP_AC…
1567 <a name="l01547"></a>01547
1568 …a name="l01548"></a>01548 <span class="keywordflow">case</span> <a class="code" href="a00150.htm…
1569 <a name="l01549"></a>01549 <span class="comment">/* In the ESTABLISHED state, we call upon the …
1570 <a name="l01550"></a>01550 <span class="comment"> data into the uip_buf. If the UIP_ACKDATA flag…
1571 <a name="l01551"></a>01551 <span class="comment"> application should put new data into the buffe…
1572 <a name="l01552"></a>01552 <span class="comment"> retransmitting an old segment, and the applica…
1573 <a name="l01553"></a>01553 <span class="comment"> data into the buffer.</span>
1574 <a name="l01554"></a>01554 <span class="comment"></span>
1575 <a name="l01555"></a>01555 <span class="comment"> If the incoming packet is a FIN, we should clo…
1576 <a name="l01556"></a>01556 <span class="comment"> this side as well, and we send out a FIN and e…
1577 <a name="l01557"></a>01557 <span class="comment"> state. We require that there is no outstanding…
1578 <a name="l01558"></a>01558 <span class="comment"> sequence numbers will be screwed up. */</span>
1579 <a name="l01559"></a>01559
1580 …a name="l01560"></a>01560 <span class="keywordflow">if</span>(<a class="code" href="a00150.htm…
1581 …a name="l01561"></a>01561 <span class="keywordflow">if</span>(<a class="code" href="a00147.h…
1582 <a name="l01562"></a>01562 <span class="keywordflow">goto</span> drop;
1583 <a name="l01563"></a>01563 }
1584 <a name="l01564"></a>01564 uip_add_rcv_nxt(1 + <a class="code" href="a00149.html#g12a33f0c097…
1585 …a name="l01565"></a>01565 <a class="code" href="a00150.html#gb4ef6b00924990e7a293f66715b6d1d…
1586 <a name="l01566"></a>01566 <span class="keywordflow">if</span>(<a class="code" href="a00149.h…
1587 …a name="l01567"></a>01567 <a class="code" href="a00150.html#gb4ef6b00924990e7a293f66715b6d…
1588 <a name="l01568"></a>01568 }
1589 <a name="l01569"></a>01569 <a class="code" href="a00153.html#g41aa744caa46913b3b3aedb2a4e7854…
1590 <a name="l01570"></a>01570 uip_connr->len = 1;
1591 <a name="l01571"></a>01571 uip_connr->tcpstateflags = <a class="code" href="a00150.html#gd…
1592 <a name="l01572"></a>01572 uip_connr->nrtx = 0;
1593 <a name="l01573"></a>01573 tcp_send_finack:
1594 …a name="l01574"></a>01574 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd…
1595 <a name="l01575"></a>01575 <span class="keywordflow">goto</span> tcp_send_nodata;
1596 <a name="l01576"></a>01576 }
1597 <a name="l01577"></a>01577
1598 <a name="l01578"></a>01578 <span class="comment">/* Check the URG flag. If this is set, the seg…
1599 <a name="l01579"></a>01579 <span class="comment"> data that we must pass to the application. …
1600 …a name="l01580"></a>01580 <span class="keywordflow">if</span>((<a class="code" href="a00150.ht…
1601 <a name="l01581"></a>01581 <span class="preprocessor">#if UIP_URGDATA > 0</span>
1602 …a name="l01582"></a>01582 <span class="preprocessor"></span> uip_urglen = (<a class="code" hr…
1603 …a name="l01583"></a>01583 <span class="keywordflow">if</span>(uip_urglen > <a class="code…
1604 <a name="l01584"></a>01584 <span class="comment">/* There is more urgent data in the next s…
1605 <a name="l01585"></a>01585 uip_urglen = <a class="code" href="a00149.html#g12a33f0c09711167…
1606 <a name="l01586"></a>01586 }
1607 <a name="l01587"></a>01587 uip_add_rcv_nxt(uip_urglen);
1608 <a name="l01588"></a>01588 <a class="code" href="a00149.html#g12a33f0c09711167bdf3dd7d7cf8c5a…
1609 <a name="l01589"></a>01589 uip_urgdata = <a class="code" href="a00150.html#g561b8eda32e059d4e…
1610 <a name="l01590"></a>01590 <a class="code" href="a00150.html#g561b8eda32e059d4e7397f776268cc6…
1611 <a name="l01591"></a>01591 } <span class="keywordflow">else</span> {
1612 <a name="l01592"></a>01592 uip_urglen = 0;
1613 <a name="l01593"></a>01593 <span class="preprocessor">#else </span><span class="comment">/* UIP_URG…
1614 …a name="l01594"></a>01594 <a class="code" href="a00150.html#g561b8eda32e059d4e7397f776268cc6…
1615 …a name="l01595"></a>01595 <a class="code" href="a00149.html#g12a33f0c09711167bdf3dd7d7cf8c5a…
1616 <a name="l01596"></a>01596 #endif <span class="comment">/* UIP_URGDATA > 0 */</span>
1617 <a name="l01597"></a>01597 }
1618 <a name="l01598"></a>01598
1619 <a name="l01599"></a>01599 <span class="comment">/* If uip_len > 0 we have TCP data in the p…
1620 <a name="l01600"></a>01600 <span class="comment"> by setting the UIP_NEWDATA flag and update …
1621 <a name="l01601"></a>01601 <span class="comment"> we acknowledge. If the application has stop…
1622 <a name="l01602"></a>01602 <span class="comment"> using uip_stop(), we must not accept any da…
1623 <a name="l01603"></a>01603 <span class="comment"> remote host. */</span>
1624 …a name="l01604"></a>01604 <span class="keywordflow">if</span>(<a class="code" href="a00149.htm…
1625 …a name="l01605"></a>01605 <a class="code" href="a00150.html#gb4ef6b00924990e7a293f66715b6d1d…
1626 <a name="l01606"></a>01606 uip_add_rcv_nxt(<a class="code" href="a00149.html#g12a33f0c0971116…
1627 <a name="l01607"></a>01607 }
1628 <a name="l01608"></a>01608
1629 <a name="l01609"></a>01609 <span class="comment">/* Check if the available buffer space adverti…
1630 <a name="l01610"></a>01610 <span class="comment"> is smaller than the initial MSS for this co…
1631 <a name="l01611"></a>01611 <span class="comment"> set the current MSS to the window size to e…
1632 <a name="l01612"></a>01612 <span class="comment"> application does not send more data than th…
1633 <a name="l01613"></a>01613 <span class="comment"> handle.</span>
1634 <a name="l01614"></a>01614 <span class="comment"></span>
1635 <a name="l01615"></a>01615 <span class="comment"> If the remote host advertises a zero window…
1636 <a name="l01616"></a>01616 <span class="comment"> the initial MSS so that the application wil…
1637 <a name="l01617"></a>01617 <span class="comment"> of data. This data will not be acknowledged…
1638 <a name="l01618"></a>01618 <span class="comment"> and the application will retransmit it. Thi…
1639 <a name="l01619"></a>01619 <span class="comment"> "persistent timer" and uses the retransmiss…
1640 <a name="l01620"></a>01620 <span class="comment"> */</span>
1641 …a name="l01621"></a>01621 tmp16 = ((<a class="code" href="a00153.html#g77570ac4fcab86864fa1916…
1642 <a name="l01622"></a>01622 <span class="keywordflow">if</span>(tmp16 > uip_connr->initial…
1643 <a name="l01623"></a>01623 tmp16 == 0) {
1644 <a name="l01624"></a>01624 tmp16 = uip_connr->initialmss;
1645 <a name="l01625"></a>01625 }
1646 <a name="l01626"></a>01626 uip_connr->mss = tmp16;
1647 <a name="l01627"></a>01627
1648 <a name="l01628"></a>01628 <span class="comment">/* If this packet constitutes an ACK for outst…
1649 <a name="l01629"></a>01629 <span class="comment"> by the UIP_ACKDATA flag, we should call the…
1650 <a name="l01630"></a>01630 <span class="comment"> might want to send more data. If the incomi…
1651 <a name="l01631"></a>01631 <span class="comment"> from the peer (as flagged by the UIP_NEWDAT…
1652 <a name="l01632"></a>01632 <span class="comment"> application must also be notified.</span>
1653 <a name="l01633"></a>01633 <span class="comment"></span>
1654 <a name="l01634"></a>01634 <span class="comment"> When the application is called, the global …
1655 <a name="l01635"></a>01635 <span class="comment"> contains the length of the incoming data. T…
1656 <a name="l01636"></a>01636 <span class="comment"> access the incoming data through the global…
1657 <a name="l01637"></a>01637 <span class="comment"> uip_appdata, which usually points UIP_IPTCP…
1658 <a name="l01638"></a>01638 <span class="comment"> bytes into the uip_buf array.</span>
1659 <a name="l01639"></a>01639 <span class="comment"></span>
1660 <a name="l01640"></a>01640 <span class="comment"> If the application wishes to send any data,…
1661 <a name="l01641"></a>01641 <span class="comment"> put into the uip_appdata and the length of …
1662 <a name="l01642"></a>01642 <span class="comment"> put into uip_len. If the application don't …
1663 <a name="l01643"></a>01643 <span class="comment"> send, uip_len must be set to 0. */</span>
1664 …a name="l01644"></a>01644 <span class="keywordflow">if</span>(<a class="code" href="a00150.htm…
1665 <a name="l01645"></a>01645 <a class="code" href="a00150.html#g5b5615dc240daed20949c0fded2b467…
1666 <a name="l01646"></a>01646 <a class="code" href="a00153.html#g41aa744caa46913b3b3aedb2a4e7854…
1667 <a name="l01647"></a>01647
1668 <a name="l01648"></a>01648 appsend:
1669 <a name="l01649"></a>01649
1670 …a name="l01650"></a>01650 <span class="keywordflow">if</span>(<a class="code" href="a00150.h…
1671 <a name="l01651"></a>01651 <a class="code" href="a00150.html#g5b5615dc240daed20949c0fded2b4…
1672 <a name="l01652"></a>01652 uip_connr->tcpstateflags = <a class="code" href="a00150.html#…
1673 …a name="l01653"></a>01653 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3b…
1674 <a name="l01654"></a>01654 <span class="keywordflow">goto</span> tcp_send_nodata;
1675 <a name="l01655"></a>01655 }
1676 <a name="l01656"></a>01656
1677 …a name="l01657"></a>01657 <span class="keywordflow">if</span>(<a class="code" href="a00150.h…
1678 <a name="l01658"></a>01658 <a class="code" href="a00150.html#g5b5615dc240daed20949c0fded2b4…
1679 <a name="l01659"></a>01659 uip_connr->len = 1;
1680 <a name="l01660"></a>01660 uip_connr->tcpstateflags = <a class="code" href="a00150.html#…
1681 <a name="l01661"></a>01661 uip_connr->nrtx = 0;
1682 …a name="l01662"></a>01662 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3b…
1683 <a name="l01663"></a>01663 <span class="keywordflow">goto</span> tcp_send_nodata;
1684 <a name="l01664"></a>01664 }
1685 <a name="l01665"></a>01665
1686 <a name="l01666"></a>01666 <span class="comment">/* If uip_slen > 0, the application has d…
1687 <a name="l01667"></a>01667 <span class="keywordflow">if</span>(<a class="code" href="a00150.h…
1688 <a name="l01668"></a>01668
1689 <a name="l01669"></a>01669 <span class="comment">/* If the connection has acknowledged data…
1690 <a name="l01670"></a>01670 <span class="comment"> the ->len variable should be discard…
1691 …a name="l01671"></a>01671 <span class="keywordflow">if</span>((<a class="code" href="a0015…
1692 <a name="l01672"></a>01672 uip_connr->len = 0;
1693 <a name="l01673"></a>01673 }
1694 <a name="l01674"></a>01674
1695 <a name="l01675"></a>01675 <span class="comment">/* If the ->len variable is non-zero th…
1696 <a name="l01676"></a>01676 <span class="comment"> already data in transit and cannot send…
1697 <a name="l01677"></a>01677 <span class="comment"> now. */</span>
1698 <a name="l01678"></a>01678 <span class="keywordflow">if</span>(uip_connr->len == 0) {
1699 <a name="l01679"></a>01679
1700 <a name="l01680"></a>01680 <span class="comment">/* The application cannot send more than…
1701 <a name="l01681"></a>01681 <span class="comment"> the mss (the minumum of the MSS and t…
1702 <a name="l01682"></a>01682 <span class="comment"> window). */</span>
1703 …a name="l01683"></a>01683 <span class="keywordflow">if</span>(<a class="code" href="a001…
1704 <a name="l01684"></a>01684 <a class="code" href="a00150.html#g5b5615dc240daed20949c0fde…
1705 <a name="l01685"></a>01685 }
1706 <a name="l01686"></a>01686
1707 <a name="l01687"></a>01687 <span class="comment">/* Remember how much data we send out no…
1708 <a name="l01688"></a>01688 <span class="comment"> when everything has been acknowledged…
1709 <a name="l01689"></a>01689 uip_connr->len = <a class="code" href="a00150.html#g5b5615d…
1710 <a name="l01690"></a>01690 } <span class="keywordflow">else</span> {
1711 <a name="l01691"></a>01691
1712 <a name="l01692"></a>01692 <span class="comment">/* If the application already had unackn…
1713 <a name="l01693"></a>01693 <span class="comment"> make sure that the application does n…
1714 <a name="l01694"></a>01694 <span class="comment"> retransmit) out more than it previous…
1715 <a name="l01695"></a>01695 <a class="code" href="a00150.html#g5b5615dc240daed20949c0fded2…
1716 <a name="l01696"></a>01696 }
1717 <a name="l01697"></a>01697 }
1718 <a name="l01698"></a>01698 uip_connr->nrtx = 0;
1719 <a name="l01699"></a>01699 apprexmit:
1720 …a name="l01700"></a>01700 <a class="code" href="a00150.html#g561b8eda32e059d4e7397f776268cc6…
1721 <a name="l01701"></a>01701
1722 <a name="l01702"></a>01702 <span class="comment">/* If the application has data to be sent, o…
1723 <a name="l01703"></a>01703 <span class="comment"> packet had new data in it, we must send o…
1724 <a name="l01704"></a>01704 <span class="keywordflow">if</span>(<a class="code" href="a00150.h…
1725 <a name="l01705"></a>01705 <span class="comment">/* Add the length of the IP and TCP header…
1726 …a name="l01706"></a>01706 <a class="code" href="a00149.html#g12a33f0c09711167bdf3dd7d7cf8c…
1727 <a name="l01707"></a>01707 <span class="comment">/* We always set the ACK flag in response …
1728 …a name="l01708"></a>01708 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3b…
1729 <a name="l01709"></a>01709 <span class="comment">/* Send the packet. */</span>
1730 <a name="l01710"></a>01710 <span class="keywordflow">goto</span> tcp_send_noopts;
1731 <a name="l01711"></a>01711 }
1732 <a name="l01712"></a>01712 <span class="comment">/* If there is no data to send, just send ou…
1733 <a name="l01713"></a>01713 <span class="comment"> there is newdata. */</span>
1734 …a name="l01714"></a>01714 <span class="keywordflow">if</span>(<a class="code" href="a00150.h…
1735 …a name="l01715"></a>01715 <a class="code" href="a00149.html#g12a33f0c09711167bdf3dd7d7cf8c…
1736 …a name="l01716"></a>01716 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3b…
1737 <a name="l01717"></a>01717 <span class="keywordflow">goto</span> tcp_send_noopts;
1738 <a name="l01718"></a>01718 }
1739 <a name="l01719"></a>01719 }
1740 <a name="l01720"></a>01720 <span class="keywordflow">goto</span> drop;
1741 <a name="l01721"></a>01721 <span class="keywordflow">case</span> <a class="code" href="a00150.htm…
1742 <a name="l01722"></a>01722 <span class="comment">/* We can close this connection if the peer ha…
1743 <a name="l01723"></a>01723 <span class="comment"> FIN. This is indicated by the UIP_ACKDATA f…
1744 <a name="l01724"></a>01724 <span class="keywordflow">if</span>(<a class="code" href="a00150.htm…
1745 <a name="l01725"></a>01725 uip_connr->tcpstateflags = <a class="code" href="a00150.html#g2…
1746 <a name="l01726"></a>01726 <a class="code" href="a00150.html#gb4ef6b00924990e7a293f66715b6d1d…
1747 <a name="l01727"></a>01727 <a class="code" href="a00153.html#g41aa744caa46913b3b3aedb2a4e7854…
1748 <a name="l01728"></a>01728 }
1749 <a name="l01729"></a>01729 <span class="keywordflow">break</span>;
1750 <a name="l01730"></a>01730
1751 …a name="l01731"></a>01731 <span class="keywordflow">case</span> <a class="code" href="a00150.htm…
1752 <a name="l01732"></a>01732 <span class="comment">/* The application has closed the connection, …
1753 <a name="l01733"></a>01733 <span class="comment"> hasn't closed its end yet. Thus we do nothi…
1754 <a name="l01734"></a>01734 <span class="comment"> FIN from the other side. */</span>
1755 <a name="l01735"></a>01735 <span class="keywordflow">if</span>(<a class="code" href="a00149.htm…
1756 <a name="l01736"></a>01736 uip_add_rcv_nxt(<a class="code" href="a00149.html#g12a33f0c0971116…
1757 <a name="l01737"></a>01737 }
1758 …a name="l01738"></a>01738 <span class="keywordflow">if</span>(<a class="code" href="a00150.htm…
1759 <a name="l01739"></a>01739 <span class="keywordflow">if</span>(<a class="code" href="a00150.h…
1760 <a name="l01740"></a>01740 uip_connr->tcpstateflags = <a class="code" href="a00150.html#…
1761 <a name="l01741"></a>01741 uip_connr->timer = 0;
1762 <a name="l01742"></a>01742 uip_connr->len = 0;
1763 <a name="l01743"></a>01743 } <span class="keywordflow">else</span> {
1764 <a name="l01744"></a>01744 uip_connr->tcpstateflags = <a class="code" href="a00150.html#…
1765 <a name="l01745"></a>01745 }
1766 <a name="l01746"></a>01746 uip_add_rcv_nxt(1);
1767 <a name="l01747"></a>01747 <a class="code" href="a00150.html#gb4ef6b00924990e7a293f66715b6d1d…
1768 <a name="l01748"></a>01748 <a class="code" href="a00153.html#g41aa744caa46913b3b3aedb2a4e7854…
1769 <a name="l01749"></a>01749 <span class="keywordflow">goto</span> tcp_send_ack;
1770 …a name="l01750"></a>01750 } <span class="keywordflow">else</span> <span class="keywordflow">if…
1771 <a name="l01751"></a>01751 uip_connr->tcpstateflags = <a class="code" href="a00150.html#g1…
1772 <a name="l01752"></a>01752 uip_connr->len = 0;
1773 <a name="l01753"></a>01753 <span class="keywordflow">goto</span> drop;
1774 <a name="l01754"></a>01754 }
1775 <a name="l01755"></a>01755 <span class="keywordflow">if</span>(<a class="code" href="a00149.htm…
1776 <a name="l01756"></a>01756 <span class="keywordflow">goto</span> tcp_send_ack;
1777 <a name="l01757"></a>01757 }
1778 <a name="l01758"></a>01758 <span class="keywordflow">goto</span> drop;
1779 <a name="l01759"></a>01759
1780 …a name="l01760"></a>01760 <span class="keywordflow">case</span> <a class="code" href="a00150.htm…
1781 <a name="l01761"></a>01761 <span class="keywordflow">if</span>(<a class="code" href="a00149.htm…
1782 <a name="l01762"></a>01762 uip_add_rcv_nxt(<a class="code" href="a00149.html#g12a33f0c0971116…
1783 <a name="l01763"></a>01763 }
1784 …a name="l01764"></a>01764 <span class="keywordflow">if</span>(<a class="code" href="a00150.htm…
1785 <a name="l01765"></a>01765 uip_connr->tcpstateflags = <a class="code" href="a00150.html#gf…
1786 <a name="l01766"></a>01766 uip_connr->timer = 0;
1787 <a name="l01767"></a>01767 uip_add_rcv_nxt(1);
1788 <a name="l01768"></a>01768 <a class="code" href="a00150.html#gb4ef6b00924990e7a293f66715b6d1d…
1789 <a name="l01769"></a>01769 <a class="code" href="a00153.html#g41aa744caa46913b3b3aedb2a4e7854…
1790 <a name="l01770"></a>01770 <span class="keywordflow">goto</span> tcp_send_ack;
1791 <a name="l01771"></a>01771 }
1792 <a name="l01772"></a>01772 <span class="keywordflow">if</span>(<a class="code" href="a00149.htm…
1793 <a name="l01773"></a>01773 <span class="keywordflow">goto</span> tcp_send_ack;
1794 <a name="l01774"></a>01774 }
1795 <a name="l01775"></a>01775 <span class="keywordflow">goto</span> drop;
1796 <a name="l01776"></a>01776
1797 <a name="l01777"></a>01777 <span class="keywordflow">case</span> <a class="code" href="a00150.htm…
1798 <a name="l01778"></a>01778 <span class="keywordflow">goto</span> tcp_send_ack;
1799 <a name="l01779"></a>01779
1800 <a name="l01780"></a>01780 <span class="keywordflow">case</span> <a class="code" href="a00150.htm…
1801 <a name="l01781"></a>01781 <span class="keywordflow">if</span>(<a class="code" href="a00150.htm…
1802 <a name="l01782"></a>01782 uip_connr->tcpstateflags = <a class="code" href="a00150.html#gf…
1803 <a name="l01783"></a>01783 uip_connr->timer = 0;
1804 <a name="l01784"></a>01784 }
1805 <a name="l01785"></a>01785 }
1806 <a name="l01786"></a>01786 <span class="keywordflow">goto</span> drop;
1807 <a name="l01787"></a>01787
1808 <a name="l01788"></a>01788
1809 <a name="l01789"></a>01789 <span class="comment">/* We jump here when we are ready to send the pa…
1810 <a name="l01790"></a>01790 <span class="comment"> to set the appropriate TCP sequence numbers i…
1811 <a name="l01791"></a>01791 tcp_send_ack:
1812 …a name="l01792"></a>01792 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1813 <a name="l01793"></a>01793 tcp_send_nodata:
1814 …a name="l01794"></a>01794 <a class="code" href="a00149.html#g12a33f0c09711167bdf3dd7d7cf8c5a1">u…
1815 <a name="l01795"></a>01795 tcp_send_noopts:
1816 …a name="l01796"></a>01796 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1817 <a name="l01797"></a>01797 tcp_send:
1818 <a name="l01798"></a>01798 <span class="comment">/* We're done with the input processing. We are …
1819 <a name="l01799"></a>01799 <span class="comment"> reply. Our job is to fill in all the fields o…
1820 <a name="l01800"></a>01800 <span class="comment"> headers before calculating the checksum and f…
1821 <a name="l01801"></a>01801 <span class="comment"> packet. */</span>
1822 <a name="l01802"></a>01802 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1823 <a name="l01803"></a>01803 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1824 <a name="l01804"></a>01804 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1825 <a name="l01805"></a>01805 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1826 <a name="l01806"></a>01806
1827 <a name="l01807"></a>01807 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1828 <a name="l01808"></a>01808 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1829 <a name="l01809"></a>01809 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1830 <a name="l01810"></a>01810 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1831 <a name="l01811"></a>01811
1832 …a name="l01812"></a>01812 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1833 <a name="l01813"></a>01813
1834 <a name="l01814"></a>01814 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1835 <a name="l01815"></a>01815 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1836 <a name="l01816"></a>01816
1837 …a name="l01817"></a>01817 <a class="code" href="a00148.html#g769512993b7b27271909d6daa4748b60">u…
1838 …a name="l01818"></a>01818 <a class="code" href="a00148.html#g769512993b7b27271909d6daa4748b60">u…
1839 <a name="l01819"></a>01819
1840 …a name="l01820"></a>01820 <span class="keywordflow">if</span>(uip_connr->tcpstateflags & …
1841 <a name="l01821"></a>01821 <span class="comment">/* If the connection has issued uip_stop(), we…
1842 <a name="l01822"></a>01822 <span class="comment"> window so that the remote host will stop se…
1843 …a name="l01823"></a>01823 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0"…
1844 <a name="l01824"></a>01824 } <span class="keywordflow">else</span> {
1845 …a name="l01825"></a>01825 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0"…
1846 …a name="l01826"></a>01826 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0"…
1847 <a name="l01827"></a>01827 }
1848 <a name="l01828"></a>01828
1849 <a name="l01829"></a>01829 tcp_send_noconn:
1850 …a name="l01830"></a>01830 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1851 <a name="l01831"></a>01831 <span class="preprocessor">#if UIP_CONF_IPV6</span>
1852 <a name="l01832"></a>01832 <span class="preprocessor"></span> <span class="comment">/* For IPv6, t…
1853 <a name="l01833"></a>01833 <span class="comment"> length. */</span>
1854 …a name="l01834"></a>01834 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1855 …a name="l01835"></a>01835 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1856 <a name="l01836"></a>01836 <span class="preprocessor">#else </span><span class="comment">/* UIP_CON…
1857 …a name="l01837"></a>01837 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1858 …a name="l01838"></a>01838 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1859 <a name="l01839"></a>01839 <span class="preprocessor">#endif </span><span class="comment">/* UIP_CO…
1860 <a name="l01840"></a>01840
1861 …a name="l01841"></a>01841 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1862 <a name="l01842"></a>01842
1863 <a name="l01843"></a>01843 <span class="comment">/* Calculate TCP checksum. */</span>
1864 <a name="l01844"></a>01844 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1865 …a name="l01845"></a>01845 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1866 <a name="l01846"></a>01846
1867 <a name="l01847"></a>01847 ip_send_nolen:
1868 <a name="l01848"></a>01848
1869 <a name="l01849"></a>01849 <span class="preprocessor">#if UIP_CONF_IPV6</span>
1870 <a name="l01850"></a>01850 <span class="preprocessor"></span> <a class="code" href="a00150.html#g2…
1871 <a name="l01851"></a>01851 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1872 <a name="l01852"></a>01852 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1873 <a name="l01853"></a>01853 <span class="preprocessor">#else </span><span class="comment">/* UIP_CON…
1874 <a name="l01854"></a>01854 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1875 <a name="l01855"></a>01855 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1876 …a name="l01856"></a>01856 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1877 <a name="l01857"></a>01857 ++ipid;
1878 <a name="l01858"></a>01858 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1879 <a name="l01859"></a>01859 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1880 <a name="l01860"></a>01860 <span class="comment">/* Calculate IP checksum. */</span>
1881 <a name="l01861"></a>01861 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1882 …a name="l01862"></a>01862 <a class="code" href="a00150.html#g24f52ac52d6e714cb04a5aa01be3bdd0">B…
1883 …a name="l01863"></a>01863 <a class="code" href="a00135.html#534d9e416324fb8ecca6b9cb4b1f6a6a">DE…
1884 <a name="l01864"></a>01864 <span class="preprocessor">#endif </span><span class="comment">/* UIP_CO…
1885 <a name="l01865"></a>01865
1886 …a name="l01866"></a>01866 <a class="code" href="a00150.html#g9c0814ed491fa452ec97910c0728d410">U…
1887 <a name="l01867"></a>01867 send:
1888 …a name="l01868"></a>01868 <a class="code" href="a00135.html#534d9e416324fb8ecca6b9cb4b1f6a6a">DE…
1889 …a name="l01869"></a>01869 (<a class="code" href="a00150.html#g24f52ac52d6e714cb04a5…
1890 <a name="l01870"></a>01870
1891 …a name="l01871"></a>01871 <a class="code" href="a00150.html#g9c0814ed491fa452ec97910c0728d410">U…
1892 <a name="l01872"></a>01872 <span class="comment">/* Return and let the caller do the actual trans…
1893 <a name="l01873"></a>01873 <a class="code" href="a00150.html#gb4ef6b00924990e7a293f66715b6d1d1">u…
1894 <a name="l01874"></a>01874 <span class="keywordflow">return</span>;
1895 <a name="l01875"></a>01875 drop:
1896 <a name="l01876"></a>01876 <a class="code" href="a00149.html#g12a33f0c09711167bdf3dd7d7cf8c5a1">u…
1897 <a name="l01877"></a>01877 <a class="code" href="a00150.html#gb4ef6b00924990e7a293f66715b6d1d1">u…
1898 <a name="l01878"></a>01878 <span class="keywordflow">return</span>;
1899 <a name="l01879"></a>01879 }
1900 <a name="l01880"></a>01880 <span class="comment">/*------------------------------------------------…
1901 <a name="l01881"></a>01881 <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16…
1902 …a name="l01882"></a><a class="code" href="a00150.html#ga22b04cac8cf283ca12f028578bebc06">01882</a>…
1903 <a name="l01883"></a>01883 {
1904 <a name="l01884"></a>01884 <span class="keywordflow">return</span> <a class="code" href="a00148.h…
1905 <a name="l01885"></a>01885 }
1906 <a name="l01886"></a>01886 <span class="comment">/*------------------------------------------------…
1907 <a name="l01887"></a>01887 <span class="keywordtype">void</span>
1908 …a name="l01888"></a><a class="code" href="a00150.html#g04b053a623aac7cd4195157d470661b3">01888</a>…
1909 <a name="l01889"></a>01889 {
1910 <a name="l01890"></a>01890 <span class="keywordflow">if</span>(len > 0) {
1911 <a name="l01891"></a>01891 <a class="code" href="a00150.html#g5b5615dc240daed20949c0fded2b4679"…
1912 …a name="l01892"></a>01892 <span class="keywordflow">if</span>(data != <a class="code" href="a0…
1913 …a name="l01893"></a>01893 memcpy(<a class="code" href="a00150.html#ga05a3dde2048480fa3ab2a59…
1914 <a name="l01894"></a>01894 }
1915 <a name="l01895"></a>01895 }
1916 <a name="l01896"></a>01896 }<span class="comment"></span>
1917 <a name="l01897"></a>01897 <span class="comment">/** @} */</span>
1919 <a href="http://www.doxygen.org/index.html">
1920 <img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.4.6 </small></address>