1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 2<html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"> 3<title>uIP 1.0: uip/psock.c Source File</title> 4<link href="doxygen.css" rel="stylesheet" type="text/css"> 5<link href="tabs.css" rel="stylesheet" type="text/css"> 6</head><body> 7<!-- Generated by Doxygen 1.4.6 --> 8<div class="tabs"> 9 <ul> 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> 15 </ul></div> 16<div class="tabs"> 17 <ul> 18 <li><a href="files.html"><span>File List</span></a></li> 19 <li><a href="globals.html"><span>Globals</span></a></li> 20 </ul></div> 21<h1>uip/psock.c</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span> 22<a name="l00002"></a>00002 <span class="comment"> * Copyright (c) 2004, Swedish Institute of Computer Science.</span> 23<a name="l00003"></a>00003 <span class="comment"> * All rights reserved.</span> 24<a name="l00004"></a>00004 <span class="comment"> *</span> 25<a name="l00005"></a>00005 <span class="comment"> * Redistribution and use in source and binary forms, with or without</span> 26<a name="l00006"></a>00006 <span class="comment"> * modification, are permitted provided that the following conditions</span> 27<a name="l00007"></a>00007 <span class="comment"> * are met:</span> 28<a name="l00008"></a>00008 <span class="comment"> * 1. Redistributions of source code must retain the above copyright</span> 29<a name="l00009"></a>00009 <span class="comment"> * notice, this list of conditions and the following disclaimer.</span> 30<a name="l00010"></a>00010 <span class="comment"> * 2. Redistributions in binary form must reproduce the above copyright</span> 31<a name="l00011"></a>00011 <span class="comment"> * notice, this list of conditions and the following disclaimer in the</span> 32<a name="l00012"></a>00012 <span class="comment"> * documentation and/or other materials provided with the distribution.</span> 33<a name="l00013"></a>00013 <span class="comment"> * 3. Neither the name of the Institute nor the names of its contributors</span> 34<a name="l00014"></a>00014 <span class="comment"> * may be used to endorse or promote products derived from this software</span> 35<a name="l00015"></a>00015 <span class="comment"> * without specific prior written permission.</span> 36<a name="l00016"></a>00016 <span class="comment"> *</span> 37<a name="l00017"></a>00017 <span class="comment"> * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND</span> 38<a name="l00018"></a>00018 <span class="comment"> * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE</span> 39<a name="l00019"></a>00019 <span class="comment"> * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE</span> 40<a name="l00020"></a>00020 <span class="comment"> * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE</span> 41<a name="l00021"></a>00021 <span class="comment"> * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL</span> 42<a name="l00022"></a>00022 <span class="comment"> * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS</span> 43<a name="l00023"></a>00023 <span class="comment"> * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)</span> 44<a name="l00024"></a>00024 <span class="comment"> * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT</span> 45<a name="l00025"></a>00025 <span class="comment"> * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY</span> 46<a name="l00026"></a>00026 <span class="comment"> * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF</span> 47<a name="l00027"></a>00027 <span class="comment"> * SUCH DAMAGE.</span> 48<a name="l00028"></a>00028 <span class="comment"> *</span> 49<a name="l00029"></a>00029 <span class="comment"> * This file is part of the uIP TCP/IP stack</span> 50<a name="l00030"></a>00030 <span class="comment"> *</span> 51<a name="l00031"></a>00031 <span class="comment"> * Author: Adam Dunkels <[email protected]></span> 52<a name="l00032"></a>00032 <span class="comment"> *</span> 53<a name="l00033"></a>00033 <span class="comment"> * $Id: psock.c,v 1.2 2006/06/12 08:00:30 adam Exp $</span> 54<a name="l00034"></a>00034 <span class="comment"> */</span> 55<a name="l00035"></a>00035 56<a name="l00036"></a>00036 <span class="preprocessor">#include <stdio.h></span> 57<a name="l00037"></a>00037 <span class="preprocessor">#include <string.h></span> 58<a name="l00038"></a>00038 59<a name="l00039"></a>00039 <span class="preprocessor">#include "<a class="code" href="a00140.html">uipopt.h</a>"</span> 60<a name="l00040"></a>00040 <span class="preprocessor">#include "<a class="code" href="a00127.html">psock.h</a>"</span> 61<a name="l00041"></a>00041 <span class="preprocessor">#include "<a class="code" href="a00136.html">uip.h</a>"</span> 62<a name="l00042"></a>00042 63<a name="l00043"></a>00043 <span class="preprocessor">#define STATE_NONE 0</span> 64<a name="l00044"></a>00044 <span class="preprocessor"></span><span class="preprocessor">#define STATE_ACKED 1</span> 65<a name="l00045"></a>00045 <span class="preprocessor"></span><span class="preprocessor">#define STATE_READ 2</span> 66<a name="l00046"></a>00046 <span class="preprocessor"></span><span class="preprocessor">#define STATE_BLOCKED_NEWDATA 3</span> 67<a name="l00047"></a>00047 <span class="preprocessor"></span><span class="preprocessor">#define STATE_BLOCKED_CLOSE 4</span> 68<a name="l00048"></a>00048 <span class="preprocessor"></span><span class="preprocessor">#define STATE_BLOCKED_SEND 5</span> 69<a name="l00049"></a>00049 <span class="preprocessor"></span><span class="preprocessor">#define STATE_DATA_SENT 6</span> 70<a name="l00050"></a>00050 <span class="preprocessor"></span> 71<a name="l00051"></a>00051 <span class="comment">/*</span> 72<a name="l00052"></a>00052 <span class="comment"> * Return value of the buffering functions that indicates that a</span> 73<a name="l00053"></a>00053 <span class="comment"> * buffer was not filled by incoming data.</span> 74<a name="l00054"></a>00054 <span class="comment"> *</span> 75<a name="l00055"></a>00055 <span class="comment"> */</span> 76<a name="l00056"></a>00056 <span class="preprocessor">#define BUF_NOT_FULL 0</span> 77<a name="l00057"></a>00057 <span class="preprocessor"></span><span class="preprocessor">#define BUF_NOT_FOUND 0</span> 78<a name="l00058"></a>00058 <span class="preprocessor"></span> 79<a name="l00059"></a>00059 <span class="comment">/*</span> 80<a name="l00060"></a>00060 <span class="comment"> * Return value of the buffering functions that indicates that a</span> 81<a name="l00061"></a>00061 <span class="comment"> * buffer was completely filled by incoming data.</span> 82<a name="l00062"></a>00062 <span class="comment"> *</span> 83<a name="l00063"></a>00063 <span class="comment"> */</span> 84<a name="l00064"></a>00064 <span class="preprocessor">#define BUF_FULL 1</span> 85<a name="l00065"></a>00065 <span class="preprocessor"></span> 86<a name="l00066"></a>00066 <span class="comment">/*</span> 87<a name="l00067"></a>00067 <span class="comment"> * Return value of the buffering functions that indicates that an</span> 88<a name="l00068"></a>00068 <span class="comment"> * end-marker byte was found.</span> 89<a name="l00069"></a>00069 <span class="comment"> *</span> 90<a name="l00070"></a>00070 <span class="comment"> */</span> 91<a name="l00071"></a>00071 <span class="preprocessor">#define BUF_FOUND 2</span> 92<a name="l00072"></a>00072 <span class="preprocessor"></span> 93<a name="l00073"></a>00073 <span class="comment">/*---------------------------------------------------------------------------*/</span> 94<a name="l00074"></a>00074 <span class="keyword">static</span> <span class="keywordtype">void</span> 95<a name="l00075"></a>00075 buf_setup(<span class="keyword">struct</span> <a class="code" href="a00083.html">psock_buf</a> *buf, 96<a name="l00076"></a>00076 <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *bufptr, <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> bufsize) 97<a name="l00077"></a>00077 { 98<a name="l00078"></a>00078 buf-><a class="code" href="a00083.html#5e8637b1514d03eb3eb12dc9a502e27e">ptr</a> = bufptr; 99<a name="l00079"></a>00079 buf-><a class="code" href="a00083.html#20fae11b540a561c622a0d74cb4b9f97">left</a> = bufsize; 100<a name="l00080"></a>00080 } 101<a name="l00081"></a>00081 <span class="comment">/*---------------------------------------------------------------------------*/</span> 102<a name="l00082"></a>00082 <span class="keyword">static</span> <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> 103<a name="l00083"></a>00083 buf_bufdata(<span class="keyword">struct</span> <a class="code" href="a00083.html">psock_buf</a> *buf, <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> len, 104<a name="l00084"></a>00084 <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> **dataptr, <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> *datalen) 105<a name="l00085"></a>00085 { 106<a name="l00086"></a>00086 <span class="keywordflow">if</span>(*datalen < buf->left) { 107<a name="l00087"></a>00087 memcpy(buf-><a class="code" href="a00083.html#5e8637b1514d03eb3eb12dc9a502e27e">ptr</a>, *dataptr, *datalen); 108<a name="l00088"></a>00088 buf-><a class="code" href="a00083.html#5e8637b1514d03eb3eb12dc9a502e27e">ptr</a> += *datalen; 109<a name="l00089"></a>00089 buf-><a class="code" href="a00083.html#20fae11b540a561c622a0d74cb4b9f97">left</a> -= *datalen; 110<a name="l00090"></a>00090 *dataptr += *datalen; 111<a name="l00091"></a>00091 *datalen = 0; 112<a name="l00092"></a>00092 <span class="keywordflow">return</span> BUF_NOT_FULL; 113<a name="l00093"></a>00093 } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(*datalen == buf-><a class="code" href="a00083.html#20fae11b540a561c622a0d74cb4b9f97">left</a>) { 114<a name="l00094"></a>00094 memcpy(buf-><a class="code" href="a00083.html#5e8637b1514d03eb3eb12dc9a502e27e">ptr</a>, *dataptr, *datalen); 115<a name="l00095"></a>00095 buf-><a class="code" href="a00083.html#5e8637b1514d03eb3eb12dc9a502e27e">ptr</a> += *datalen; 116<a name="l00096"></a>00096 buf-><a class="code" href="a00083.html#20fae11b540a561c622a0d74cb4b9f97">left</a> = 0; 117<a name="l00097"></a>00097 *dataptr += *datalen; 118<a name="l00098"></a>00098 *datalen = 0; 119<a name="l00099"></a>00099 <span class="keywordflow">return</span> BUF_FULL; 120<a name="l00100"></a>00100 } <span class="keywordflow">else</span> { 121<a name="l00101"></a>00101 memcpy(buf-><a class="code" href="a00083.html#5e8637b1514d03eb3eb12dc9a502e27e">ptr</a>, *dataptr, buf-><a class="code" href="a00083.html#20fae11b540a561c622a0d74cb4b9f97">left</a>); 122<a name="l00102"></a>00102 buf-><a class="code" href="a00083.html#5e8637b1514d03eb3eb12dc9a502e27e">ptr</a> += buf-><a class="code" href="a00083.html#20fae11b540a561c622a0d74cb4b9f97">left</a>; 123<a name="l00103"></a>00103 *datalen -= buf-><a class="code" href="a00083.html#20fae11b540a561c622a0d74cb4b9f97">left</a>; 124<a name="l00104"></a>00104 *dataptr += buf-><a class="code" href="a00083.html#20fae11b540a561c622a0d74cb4b9f97">left</a>; 125<a name="l00105"></a>00105 buf-><a class="code" href="a00083.html#20fae11b540a561c622a0d74cb4b9f97">left</a> = 0; 126<a name="l00106"></a>00106 <span class="keywordflow">return</span> BUF_FULL; 127<a name="l00107"></a>00107 } 128<a name="l00108"></a>00108 } 129<a name="l00109"></a>00109 <span class="comment">/*---------------------------------------------------------------------------*/</span> 130<a name="l00110"></a>00110 <span class="keyword">static</span> <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> 131<a name="l00111"></a>00111 buf_bufto(<span class="keyword">register</span> <span class="keyword">struct</span> <a class="code" href="a00083.html">psock_buf</a> *buf, <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> endmarker, 132<a name="l00112"></a>00112 <span class="keyword">register</span> <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> **dataptr, <span class="keyword">register</span> <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> *datalen) 133<a name="l00113"></a>00113 { 134<a name="l00114"></a>00114 <a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> c; 135<a name="l00115"></a>00115 <span class="keywordflow">while</span>(buf->left > 0 && *datalen > 0) { 136<a name="l00116"></a>00116 c = *buf->ptr = **dataptr; 137<a name="l00117"></a>00117 ++*dataptr; 138<a name="l00118"></a>00118 ++buf->ptr; 139<a name="l00119"></a>00119 --*datalen; 140<a name="l00120"></a>00120 --buf->left; 141<a name="l00121"></a>00121 142<a name="l00122"></a>00122 <span class="keywordflow">if</span>(c == endmarker) { 143<a name="l00123"></a>00123 <span class="keywordflow">return</span> BUF_FOUND; 144<a name="l00124"></a>00124 } 145<a name="l00125"></a>00125 } 146<a name="l00126"></a>00126 147<a name="l00127"></a>00127 <span class="keywordflow">if</span>(*datalen == 0) { 148<a name="l00128"></a>00128 <span class="keywordflow">return</span> BUF_NOT_FOUND; 149<a name="l00129"></a>00129 } 150<a name="l00130"></a>00130 151<a name="l00131"></a>00131 <span class="keywordflow">while</span>(*datalen > 0) { 152<a name="l00132"></a>00132 c = **dataptr; 153<a name="l00133"></a>00133 --*datalen; 154<a name="l00134"></a>00134 ++*dataptr; 155<a name="l00135"></a>00135 156<a name="l00136"></a>00136 <span class="keywordflow">if</span>(c == endmarker) { 157<a name="l00137"></a>00137 <span class="keywordflow">return</span> BUF_FOUND | BUF_FULL; 158<a name="l00138"></a>00138 } 159<a name="l00139"></a>00139 } 160<a name="l00140"></a>00140 161<a name="l00141"></a>00141 <span class="keywordflow">return</span> BUF_FULL; 162<a name="l00142"></a>00142 } 163<a name="l00143"></a>00143 <span class="comment">/*---------------------------------------------------------------------------*/</span> 164<a name="l00144"></a>00144 <span class="keyword">static</span> <span class="keywordtype">char</span> 165<a name="l00145"></a>00145 send_data(<span class="keyword">register</span> <span class="keyword">struct</span> <a class="code" href="a00082.html">psock</a> *s) 166<a name="l00146"></a>00146 { 167<a name="l00147"></a>00147 <span class="keywordflow">if</span>(s->state != STATE_DATA_SENT || <a class="code" href="a00147.html#ga8933ad15a2e2947dae4a5cff50e6007">uip_rexmit</a>()) { 168<a name="l00148"></a>00148 <span class="keywordflow">if</span>(s->sendlen > <a class="code" href="a00147.html#gb5fecbc62edd128012cea0f47b57ab9f">uip_mss</a>()) { 169<a name="l00149"></a>00149 <a class="code" href="a00147.html#g04b053a623aac7cd4195157d470661b3">uip_send</a>(s->sendptr, <a class="code" href="a00147.html#gb5fecbc62edd128012cea0f47b57ab9f">uip_mss</a>()); 170<a name="l00150"></a>00150 } <span class="keywordflow">else</span> { 171<a name="l00151"></a>00151 <a class="code" href="a00147.html#g04b053a623aac7cd4195157d470661b3">uip_send</a>(s->sendptr, s->sendlen); 172<a name="l00152"></a>00152 } 173<a name="l00153"></a>00153 s->state = STATE_DATA_SENT; 174<a name="l00154"></a>00154 <span class="keywordflow">return</span> 1; 175<a name="l00155"></a>00155 } 176<a name="l00156"></a>00156 <span class="keywordflow">return</span> 0; 177<a name="l00157"></a>00157 } 178<a name="l00158"></a>00158 <span class="comment">/*---------------------------------------------------------------------------*/</span> 179<a name="l00159"></a>00159 <span class="keyword">static</span> <span class="keywordtype">char</span> 180<a name="l00160"></a>00160 data_acked(<span class="keyword">register</span> <span class="keyword">struct</span> <a class="code" href="a00082.html">psock</a> *s) 181<a name="l00161"></a>00161 { 182<a name="l00162"></a>00162 <span class="keywordflow">if</span>(s->state == STATE_DATA_SENT && <a class="code" href="a00147.html#gde6634974418e3240c212b9b16864368">uip_acked</a>()) { 183<a name="l00163"></a>00163 <span class="keywordflow">if</span>(s->sendlen > <a class="code" href="a00147.html#gb5fecbc62edd128012cea0f47b57ab9f">uip_mss</a>()) { 184<a name="l00164"></a>00164 s->sendlen -= <a class="code" href="a00147.html#gb5fecbc62edd128012cea0f47b57ab9f">uip_mss</a>(); 185<a name="l00165"></a>00165 s->sendptr += <a class="code" href="a00147.html#gb5fecbc62edd128012cea0f47b57ab9f">uip_mss</a>(); 186<a name="l00166"></a>00166 } <span class="keywordflow">else</span> { 187<a name="l00167"></a>00167 s->sendptr += s->sendlen; 188<a name="l00168"></a>00168 s->sendlen = 0; 189<a name="l00169"></a>00169 } 190<a name="l00170"></a>00170 s->state = STATE_ACKED; 191<a name="l00171"></a>00171 <span class="keywordflow">return</span> 1; 192<a name="l00172"></a>00172 } 193<a name="l00173"></a>00173 <span class="keywordflow">return</span> 0; 194<a name="l00174"></a>00174 } 195<a name="l00175"></a>00175 <span class="comment">/*---------------------------------------------------------------------------*/</span> 196<a name="l00176"></a>00176 <a class="code" href="a00142.html#g3d4c8bd4aada659eb34f5d2ffd3e7901">PT_THREAD</a>(psock_send(<span class="keyword">register</span> <span class="keyword">struct</span> <a class="code" href="a00082.html">psock</a> *s, <span class="keyword">const</span> <span class="keywordtype">char</span> *buf, 197<a name="l00177"></a>00177 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> len)) 198<a name="l00178"></a>00178 { 199<a name="l00179"></a>00179 <a class="code" href="a00142.html#g2ffbb9e554e08a343ae2f9de4bedfdfc">PT_BEGIN</a>(&s->psockpt); 200<a name="l00180"></a>00180 201<a name="l00181"></a>00181 <span class="comment">/* If there is no data to send, we exit immediately. */</span> 202<a name="l00182"></a>00182 <span class="keywordflow">if</span>(len == 0) { 203<a name="l00183"></a>00183 <a class="code" href="a00142.html#g905451249dca72ce0385bf2a9ff178ee">PT_EXIT</a>(&s->psockpt); 204<a name="l00184"></a>00184 } 205<a name="l00185"></a>00185 206<a name="l00186"></a>00186 <span class="comment">/* Save the length of and a pointer to the data that is to be</span> 207<a name="l00187"></a>00187 <span class="comment"> sent. */</span> 208<a name="l00188"></a>00188 s->sendptr = buf; 209<a name="l00189"></a>00189 s->sendlen = len; 210<a name="l00190"></a>00190 211<a name="l00191"></a>00191 s->state = STATE_NONE; 212<a name="l00192"></a>00192 213<a name="l00193"></a>00193 <span class="comment">/* We loop here until all data is sent. The s->sendlen variable is</span> 214<a name="l00194"></a>00194 <span class="comment"> updated by the data_sent() function. */</span> 215<a name="l00195"></a>00195 <span class="keywordflow">while</span>(s->sendlen > 0) { 216<a name="l00196"></a>00196 217<a name="l00197"></a>00197 <span class="comment">/*</span> 218<a name="l00198"></a>00198 <span class="comment"> * The condition for this PT_WAIT_UNTIL is a little tricky: the</span> 219<a name="l00199"></a>00199 <span class="comment"> * protothread will wait here until all data has been acknowledged</span> 220<a name="l00200"></a>00200 <span class="comment"> * (data_acked() returns true) and until all data has been sent</span> 221<a name="l00201"></a>00201 <span class="comment"> * (send_data() returns true). The two functions data_acked() and</span> 222<a name="l00202"></a>00202 <span class="comment"> * send_data() must be called in succession to ensure that all</span> 223<a name="l00203"></a>00203 <span class="comment"> * data is sent. Therefore the & operator is used instead of the</span> 224<a name="l00204"></a>00204 <span class="comment"> * && operator, which would cause only the data_acked() function</span> 225<a name="l00205"></a>00205 <span class="comment"> * to be called when it returns false.</span> 226<a name="l00206"></a>00206 <span class="comment"> */</span> 227<a name="l00207"></a>00207 <a class="code" href="a00142.html#g99e43010ec61327164466aa2d902de45">PT_WAIT_UNTIL</a>(&s->psockpt, data_acked(s) & send_data(s)); 228<a name="l00208"></a>00208 } 229<a name="l00209"></a>00209 230<a name="l00210"></a>00210 s->state = STATE_NONE; 231<a name="l00211"></a>00211 232<a name="l00212"></a>00212 <a class="code" href="a00142.html#g7b04a0035bef29d905496c23bae066d2">PT_END</a>(&s->psockpt); 233<a name="l00213"></a>00213 } 234<a name="l00214"></a>00214 <span class="comment">/*---------------------------------------------------------------------------*/</span> 235<a name="l00215"></a>00215 <a class="code" href="a00142.html#g3d4c8bd4aada659eb34f5d2ffd3e7901">PT_THREAD</a>(psock_generator_send(<span class="keyword">register</span> <span class="keyword">struct</span> <a class="code" href="a00082.html">psock</a> *s, 236<a name="l00216"></a>00216 <span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> (*generate)(<span class="keywordtype">void</span> *), <span class="keywordtype">void</span> *arg)) 237<a name="l00217"></a>00217 { 238<a name="l00218"></a>00218 <a class="code" href="a00142.html#g2ffbb9e554e08a343ae2f9de4bedfdfc">PT_BEGIN</a>(&s->psockpt); 239<a name="l00219"></a>00219 240<a name="l00220"></a>00220 <span class="comment">/* Ensure that there is a generator function to call. */</span> 241<a name="l00221"></a>00221 <span class="keywordflow">if</span>(generate == <a class="code" href="a00160.html#g070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) { 242<a name="l00222"></a>00222 <a class="code" href="a00142.html#g905451249dca72ce0385bf2a9ff178ee">PT_EXIT</a>(&s->psockpt); 243<a name="l00223"></a>00223 } 244<a name="l00224"></a>00224 245<a name="l00225"></a>00225 <span class="comment">/* Call the generator function to generate the data in the</span> 246<a name="l00226"></a>00226 <span class="comment"> uip_appdata buffer. */</span> 247<a name="l00227"></a>00227 s->sendlen = generate(arg); 248<a name="l00228"></a>00228 s->sendptr = <a class="code" href="a00150.html#g561b8eda32e059d4e7397f776268cc63">uip_appdata</a>; 249<a name="l00229"></a>00229 250<a name="l00230"></a>00230 s->state = STATE_NONE; 251<a name="l00231"></a>00231 <span class="keywordflow">do</span> { 252<a name="l00232"></a>00232 <span class="comment">/* Call the generator function again if we are called to perform a</span> 253<a name="l00233"></a>00233 <span class="comment"> retransmission. */</span> 254<a name="l00234"></a>00234 <span class="keywordflow">if</span>(<a class="code" href="a00147.html#ga8933ad15a2e2947dae4a5cff50e6007">uip_rexmit</a>()) { 255<a name="l00235"></a>00235 generate(arg); 256<a name="l00236"></a>00236 } 257<a name="l00237"></a>00237 <span class="comment">/* Wait until all data is sent and acknowledged. */</span> 258<a name="l00238"></a>00238 <a class="code" href="a00142.html#g99e43010ec61327164466aa2d902de45">PT_WAIT_UNTIL</a>(&s->psockpt, data_acked(s) & send_data(s)); 259<a name="l00239"></a>00239 } <span class="keywordflow">while</span>(s->sendlen > 0); 260<a name="l00240"></a>00240 261<a name="l00241"></a>00241 s->state = STATE_NONE; 262<a name="l00242"></a>00242 263<a name="l00243"></a>00243 <a class="code" href="a00142.html#g7b04a0035bef29d905496c23bae066d2">PT_END</a>(&s->psockpt); 264<a name="l00244"></a>00244 } 265<a name="l00245"></a>00245 <span class="comment">/*---------------------------------------------------------------------------*/</span> 266<a name="l00246"></a>00246 <a class="code" href="a00153.html#g77570ac4fcab86864fa1916e55676da2">u16_t</a> 267<a name="l00247"></a><a class="code" href="a00158.html#g3178402dd725776415bf9745e7bf92ba">00247</a> <a class="code" href="a00158.html#g3178402dd725776415bf9745e7bf92ba">psock_datalen</a>(<span class="keyword">struct</span> <a class="code" href="a00082.html">psock</a> *<a class="code" href="a00082.html">psock</a>) 268<a name="l00248"></a>00248 { 269<a name="l00249"></a>00249 <span class="keywordflow">return</span> psock-><a class="code" href="a00082.html#a6bfaf327ce839ba70accd71014398d0">bufsize</a> - psock-><a class="code" href="a00082.html#d6bd03239291629676e4c0286ebb650f">buf</a>.<a class="code" href="a00083.html#20fae11b540a561c622a0d74cb4b9f97">left</a>; 270<a name="l00250"></a>00250 } 271<a name="l00251"></a>00251 <span class="comment">/*---------------------------------------------------------------------------*/</span> 272<a name="l00252"></a>00252 <span class="keywordtype">char</span> 273<a name="l00253"></a><a class="code" href="a00158.html#g3b19f65e48079d8105be2a99b5b4b2ae">00253</a> <a class="code" href="a00158.html#g3b19f65e48079d8105be2a99b5b4b2ae">psock_newdata</a>(<span class="keyword">struct</span> <a class="code" href="a00082.html">psock</a> *s) 274<a name="l00254"></a>00254 { 275<a name="l00255"></a>00255 <span class="keywordflow">if</span>(s-><a class="code" href="a00082.html#a408ca8630154ebd039f37a828399f7b">readlen</a> > 0) { 276<a name="l00256"></a>00256 <span class="comment">/* There is data in the uip_appdata buffer that has not yet been</span> 277<a name="l00257"></a>00257 <span class="comment"> read with the PSOCK_READ functions. */</span> 278<a name="l00258"></a>00258 <span class="keywordflow">return</span> 1; 279<a name="l00259"></a>00259 } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(s-><a class="code" href="a00082.html#fda184638130452f3570966acc5b97f9">state</a> == STATE_READ) { 280<a name="l00260"></a>00260 <span class="comment">/* All data in uip_appdata buffer already consumed. */</span> 281<a name="l00261"></a>00261 s-><a class="code" href="a00082.html#fda184638130452f3570966acc5b97f9">state</a> = STATE_BLOCKED_NEWDATA; 282<a name="l00262"></a>00262 <span class="keywordflow">return</span> 0; 283<a name="l00263"></a>00263 } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(<a class="code" href="a00147.html#g26a14b8dae3f861830af9e7cf1e03725">uip_newdata</a>()) { 284<a name="l00264"></a>00264 <span class="comment">/* There is new data that has not been consumed. */</span> 285<a name="l00265"></a>00265 <span class="keywordflow">return</span> 1; 286<a name="l00266"></a>00266 } <span class="keywordflow">else</span> { 287<a name="l00267"></a>00267 <span class="comment">/* There is no new data. */</span> 288<a name="l00268"></a>00268 <span class="keywordflow">return</span> 0; 289<a name="l00269"></a>00269 } 290<a name="l00270"></a>00270 } 291<a name="l00271"></a>00271 <span class="comment">/*---------------------------------------------------------------------------*/</span> 292<a name="l00272"></a>00272 <a class="code" href="a00142.html#g3d4c8bd4aada659eb34f5d2ffd3e7901">PT_THREAD</a>(psock_readto(<span class="keyword">register</span> <span class="keyword">struct</span> <a class="code" href="a00082.html">psock</a> *<a class="code" href="a00082.html">psock</a>, <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> c)) 293<a name="l00273"></a>00273 { 294<a name="l00274"></a>00274 <a class="code" href="a00142.html#g2ffbb9e554e08a343ae2f9de4bedfdfc">PT_BEGIN</a>(&psock->psockpt); 295<a name="l00275"></a>00275 296<a name="l00276"></a>00276 buf_setup(&psock->buf, psock->bufptr, psock->bufsize); 297<a name="l00277"></a>00277 298<a name="l00278"></a>00278 <span class="comment">/* XXX: Should add buf_checkmarker() before do{} loop, if</span> 299<a name="l00279"></a>00279 <span class="comment"> incoming data has been handled while waiting for a write. */</span> 300<a name="l00280"></a>00280 301<a name="l00281"></a>00281 <span class="keywordflow">do</span> { 302<a name="l00282"></a>00282 <span class="keywordflow">if</span>(psock->readlen == 0) { 303<a name="l00283"></a>00283 <a class="code" href="a00142.html#g99e43010ec61327164466aa2d902de45">PT_WAIT_UNTIL</a>(&psock->psockpt, <a class="code" href="a00158.html#g3b19f65e48079d8105be2a99b5b4b2ae">psock_newdata</a>(psock)); 304<a name="l00284"></a>00284 psock->state = STATE_READ; 305<a name="l00285"></a>00285 psock->readptr = (<a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *)<a class="code" href="a00150.html#g561b8eda32e059d4e7397f776268cc63">uip_appdata</a>; 306<a name="l00286"></a>00286 psock->readlen = <a class="code" href="a00147.html#g1a1bc437c09ddef238abab41d77c3177">uip_datalen</a>(); 307<a name="l00287"></a>00287 } 308<a name="l00288"></a>00288 } <span class="keywordflow">while</span>((buf_bufto(&psock->buf, c, 309<a name="l00289"></a>00289 &psock->readptr, 310<a name="l00290"></a>00290 &psock->readlen) & BUF_FOUND) == 0); 311<a name="l00291"></a>00291 312<a name="l00292"></a>00292 <span class="keywordflow">if</span>(<a class="code" href="a00158.html#g3178402dd725776415bf9745e7bf92ba">psock_datalen</a>(psock) == 0) { 313<a name="l00293"></a>00293 psock->state = STATE_NONE; 314<a name="l00294"></a>00294 <a class="code" href="a00142.html#gcd3ac045f0a4ae63412e3b3d8780e8ab">PT_RESTART</a>(&psock->psockpt); 315<a name="l00295"></a>00295 } 316<a name="l00296"></a>00296 <a class="code" href="a00142.html#g7b04a0035bef29d905496c23bae066d2">PT_END</a>(&psock->psockpt); 317<a name="l00297"></a>00297 } 318<a name="l00298"></a>00298 <span class="comment">/*---------------------------------------------------------------------------*/</span> 319<a name="l00299"></a>00299 <a class="code" href="a00142.html#g3d4c8bd4aada659eb34f5d2ffd3e7901">PT_THREAD</a>(psock_readbuf(<span class="keyword">register</span> <span class="keyword">struct</span> psock *psock)) 320<a name="l00300"></a>00300 { 321<a name="l00301"></a>00301 <a class="code" href="a00142.html#g2ffbb9e554e08a343ae2f9de4bedfdfc">PT_BEGIN</a>(&psock->psockpt); 322<a name="l00302"></a>00302 323<a name="l00303"></a>00303 buf_setup(&psock->buf, psock->bufptr, psock->bufsize); 324<a name="l00304"></a>00304 325<a name="l00305"></a>00305 <span class="comment">/* XXX: Should add buf_checkmarker() before do{} loop, if</span> 326<a name="l00306"></a>00306 <span class="comment"> incoming data has been handled while waiting for a write. */</span> 327<a name="l00307"></a>00307 328<a name="l00308"></a>00308 <span class="keywordflow">do</span> { 329<a name="l00309"></a>00309 <span class="keywordflow">if</span>(psock->readlen == 0) { 330<a name="l00310"></a>00310 <a class="code" href="a00142.html#g99e43010ec61327164466aa2d902de45">PT_WAIT_UNTIL</a>(&psock->psockpt, <a class="code" href="a00158.html#g3b19f65e48079d8105be2a99b5b4b2ae">psock_newdata</a>(psock)); 331<a name="l00311"></a>00311 printf(<span class="stringliteral">"Waited for newdata\n"</span>); 332<a name="l00312"></a>00312 psock->state = STATE_READ; 333<a name="l00313"></a>00313 psock->readptr = (<a class="code" href="a00153.html#g4caecabca98b43919dd11be1c0d4cd8e">u8_t</a> *)<a class="code" href="a00150.html#g561b8eda32e059d4e7397f776268cc63">uip_appdata</a>; 334<a name="l00314"></a>00314 psock->readlen = <a class="code" href="a00147.html#g1a1bc437c09ddef238abab41d77c3177">uip_datalen</a>(); 335<a name="l00315"></a>00315 } 336<a name="l00316"></a>00316 } <span class="keywordflow">while</span>(buf_bufdata(&psock->buf, psock->bufsize, 337<a name="l00317"></a>00317 &psock->readptr, 338<a name="l00318"></a>00318 &psock->readlen) != BUF_FULL); 339<a name="l00319"></a>00319 340<a name="l00320"></a>00320 <span class="keywordflow">if</span>(<a class="code" href="a00158.html#g3178402dd725776415bf9745e7bf92ba">psock_datalen</a>(psock) == 0) { 341<a name="l00321"></a>00321 psock->state = STATE_NONE; 342<a name="l00322"></a>00322 <a class="code" href="a00142.html#gcd3ac045f0a4ae63412e3b3d8780e8ab">PT_RESTART</a>(&psock->psockpt); 343<a name="l00323"></a>00323 } 344<a name="l00324"></a>00324 <a class="code" href="a00142.html#g7b04a0035bef29d905496c23bae066d2">PT_END</a>(&psock->psockpt); 345<a name="l00325"></a>00325 } 346<a name="l00326"></a>00326 <span class="comment">/*---------------------------------------------------------------------------*/</span> 347<a name="l00327"></a>00327 <span class="keywordtype">void</span> 348<a name="l00328"></a>00328 psock_init(<span class="keyword">register</span> <span class="keyword">struct</span> psock *psock, <span class="keywordtype">char</span> *buffer, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> buffersize) 349<a name="l00329"></a>00329 { 350<a name="l00330"></a>00330 psock->state = STATE_NONE; 351<a name="l00331"></a>00331 psock->readlen = 0; 352<a name="l00332"></a>00332 psock->bufptr = buffer; 353<a name="l00333"></a>00333 psock->bufsize = buffersize; 354<a name="l00334"></a>00334 buf_setup(&psock->buf, buffer, buffersize); 355<a name="l00335"></a>00335 <a class="code" href="a00142.html#ge6bae7dc0225468c8a5ac269df549892">PT_INIT</a>(&psock->pt); 356<a name="l00336"></a>00336 <a class="code" href="a00142.html#ge6bae7dc0225468c8a5ac269df549892">PT_INIT</a>(&psock->psockpt); 357<a name="l00337"></a>00337 } 358<a name="l00338"></a>00338 <span class="comment">/*---------------------------------------------------------------------------*/</span> 359</pre></div><hr size="1"><address style="align: right;"><small>Generated on Mon Jun 12 10:23:01 2006 for uIP 1.0 by 360<a href="http://www.doxygen.org/index.html"> 361<img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.4.6 </small></address> 362</body> 363</html> 364
