7 * \defgroup httpd Web server
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9 * The uIP web server is a very simplistic implementation of an HTTP
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10 * server. It can serve web pages and files from a read-only ROM
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11 * filesystem, and provides a very small scripting language.
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19 * Adam Dunkels <adam@sics.se>
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23 * Copyright (c) 2004, Adam Dunkels.
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24 * All rights reserved.
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26 * Redistribution and use in source and binary forms, with or without
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27 * modification, are permitted provided that the following conditions
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29 * 1. Redistributions of source code must retain the above copyright
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30 * notice, this list of conditions and the following disclaimer.
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31 * 2. Redistributions in binary form must reproduce the above copyright
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32 * notice, this list of conditions and the following disclaimer in the
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33 * documentation and/or other materials provided with the distribution.
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34 * 3. Neither the name of the Institute nor the names of its contributors
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35 * may be used to endorse or promote products derived from this software
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36 * without specific prior written permission.
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38 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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39 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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40 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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41 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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42 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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43 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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44 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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45 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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46 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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47 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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50 * This file is part of the uIP TCP/IP stack.
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52 * Author: Adam Dunkels <adam@sics.se>
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54 * $Id: httpd.c,v 1.2 2006/06/11 21:46:38 adam Exp $
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56 #include "net/uip.h"
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57 #include "apps/httpd/httpd.h"
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58 #include "apps/httpd/httpd-fs.h"
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59 #include "apps/httpd/httpd-cgi.h"
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60 #include "apps/httpd/http-strings.h"
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64 #define STATE_WAITING 0
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65 #define STATE_OUTPUT 1
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68 #define ISO_space 0x20
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69 #define ISO_bang 0x21
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70 #define ISO_percent 0x25
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71 #define ISO_period 0x2e
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72 #define ISO_slash 0x2f
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73 #define ISO_colon 0x3a
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75 /*---------------------------------------------------------------------------*/
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76 static unsigned short generate_part_of_file( void *state )
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78 struct httpd_state *s = ( struct httpd_state * ) state;
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80 if( s->file.len > uip_mss() )
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86 s->len = s->file.len;
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89 memcpy( uip_appdata, s->file.data, s->len );
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94 /*---------------------------------------------------------------------------*/
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95 static PT_THREAD( send_file ( struct httpd_state *s ) )
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97 PSOCK_BEGIN( &s->sout );
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101 PSOCK_GENERATOR_SEND( &s->sout, generate_part_of_file, s );
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102 s->file.len -= s->len;
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103 s->file.data += s->len;
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104 } while( s->file.len > 0 );
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106 PSOCK_END( &s->sout );
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109 /*---------------------------------------------------------------------------*/
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110 static PT_THREAD( send_part_of_file ( struct httpd_state *s ) )
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112 PSOCK_BEGIN( &s->sout );
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114 PSOCK_SEND( &s->sout, s->file.data, s->len );
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116 PSOCK_END( &s->sout );
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119 /*---------------------------------------------------------------------------*/
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120 static void next_scriptstate( struct httpd_state *s )
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123 p = strchr( s->scriptptr, ISO_nl ) + 1;
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124 s->scriptlen -= ( unsigned short ) ( p - s->scriptptr );
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128 /*---------------------------------------------------------------------------*/
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129 static PT_THREAD( handle_script ( struct httpd_state *s ) )
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133 PT_BEGIN( &s->scriptpt );
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135 while( s->file.len > 0 )
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137 /* Check if we should start executing a script. */
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138 if( *s->file.data == ISO_percent && *(s->file.data + 1) == ISO_bang )
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140 s->scriptptr = s->file.data + 3;
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141 s->scriptlen = s->file.len - 3;
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142 if( *(s->scriptptr - 1) == ISO_colon )
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144 httpd_fs_open( s->scriptptr + 1, &s->file );
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145 PT_WAIT_THREAD( &s->scriptpt, send_file(s) );
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149 PT_WAIT_THREAD( &s->scriptpt, httpd_cgi(s->scriptptr) (s, s->scriptptr) );
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152 next_scriptstate( s );
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154 /* The script is over, so we reset the pointers and continue
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155 sending the rest of the file. */
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156 s->file.data = s->scriptptr;
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157 s->file.len = s->scriptlen;
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161 /* See if we find the start of script marker in the block of HTML
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163 if( s->file.len > uip_mss() )
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165 s->len = uip_mss();
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169 s->len = s->file.len;
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172 if( *s->file.data == ISO_percent )
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174 ptr = strchr( s->file.data + 1, ISO_percent );
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178 ptr = strchr( s->file.data, ISO_percent );
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181 if( ptr != NULL && ptr != s->file.data )
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183 s->len = ( int ) ( ptr - s->file.data );
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184 if( s->len >= uip_mss() )
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186 s->len = uip_mss();
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190 PT_WAIT_THREAD( &s->scriptpt, send_part_of_file(s) );
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191 s->file.data += s->len;
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192 s->file.len -= s->len;
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196 PT_END( &s->scriptpt );
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199 /*---------------------------------------------------------------------------*/
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200 static PT_THREAD( send_headers ( struct httpd_state *s, const char *statushdr ) )
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204 PSOCK_BEGIN( &s->sout );
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206 PSOCK_SEND_STR( &s->sout, statushdr );
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208 ptr = strrchr( s->filename, ISO_period );
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211 PSOCK_SEND_STR( &s->sout, http_content_type_binary );
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213 else if( strncmp(http_html, ptr, 5) == 0 || strncmp(http_shtml, ptr, 6) == 0 )
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215 PSOCK_SEND_STR( &s->sout, http_content_type_html );
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217 else if( strncmp(http_css, ptr, 4) == 0 )
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219 PSOCK_SEND_STR( &s->sout, http_content_type_css );
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221 else if( strncmp(http_png, ptr, 4) == 0 )
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223 PSOCK_SEND_STR( &s->sout, http_content_type_png );
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225 else if( strncmp(http_gif, ptr, 4) == 0 )
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227 PSOCK_SEND_STR( &s->sout, http_content_type_gif );
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229 else if( strncmp(http_jpg, ptr, 4) == 0 )
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231 PSOCK_SEND_STR( &s->sout, http_content_type_jpg );
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235 PSOCK_SEND_STR( &s->sout, http_content_type_plain );
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238 PSOCK_END( &s->sout );
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241 /*---------------------------------------------------------------------------*/
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242 static PT_THREAD( handle_output ( struct httpd_state *s ) )
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246 PT_BEGIN( &s->outputpt );
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248 if( !httpd_fs_open(s->filename, &s->file) )
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250 httpd_fs_open( http_404_html, &s->file );
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251 strcpy( s->filename, http_404_html );
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252 PT_WAIT_THREAD( &s->outputpt, send_headers(s, http_header_404) );
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253 PT_WAIT_THREAD( &s->outputpt, send_file(s) );
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257 PT_WAIT_THREAD( &s->outputpt, send_headers(s, http_header_200) );
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258 ptr = strchr( s->filename, ISO_period );
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259 if( ptr != NULL && strncmp(ptr, http_shtml, 6) == 0 )
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261 PT_INIT( &s->scriptpt );
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262 PT_WAIT_THREAD( &s->outputpt, handle_script(s) );
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266 PT_WAIT_THREAD( &s->outputpt, send_file(s) );
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270 PSOCK_CLOSE( &s->sout );
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271 PT_END( &s->outputpt );
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274 /*---------------------------------------------------------------------------*/
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275 static PT_THREAD( handle_input ( struct httpd_state *s ) )
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277 PSOCK_BEGIN( &s->sin );
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279 PSOCK_READTO( &s->sin, ISO_space );
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281 if( strncmp(s->inputbuf, http_get, 4) != 0 )
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283 PSOCK_CLOSE_EXIT( &s->sin );
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286 PSOCK_READTO( &s->sin, ISO_space );
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288 if( s->inputbuf[0] != ISO_slash )
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290 PSOCK_CLOSE_EXIT( &s->sin );
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293 if( s->inputbuf[1] == ISO_space )
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295 strncpy( s->filename, http_index_html, sizeof(s->filename) );
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299 s->inputbuf[PSOCK_DATALEN( &s->sin ) - 1] = 0;
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300 strncpy( s->filename, &s->inputbuf[0], sizeof(s->filename) );
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303 /* httpd_log_file(uip_conn->ripaddr, s->filename);*/
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304 s->state = STATE_OUTPUT;
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308 PSOCK_READTO( &s->sin, ISO_nl );
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310 if( strncmp(s->inputbuf, http_referer, 8) == 0 )
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312 s->inputbuf[PSOCK_DATALEN( &s->sin ) - 2] = 0;
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314 /* httpd_log(&s->inputbuf[9]);*/
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318 PSOCK_END( &s->sin );
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321 /*---------------------------------------------------------------------------*/
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322 static void handle_connection( struct httpd_state *s )
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325 if( s->state == STATE_OUTPUT )
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327 handle_output( s );
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331 /*---------------------------------------------------------------------------*/
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332 void httpd_appcall( void )
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334 struct httpd_state *s = ( struct httpd_state * ) &( uip_conn->appstate );
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336 if( uip_closed() || uip_aborted() || uip_timedout() )
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339 else if( uip_connected() )
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341 PSOCK_INIT( &s->sin, s->inputbuf, sizeof(s->inputbuf) - 1 );
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342 PSOCK_INIT( &s->sout, s->inputbuf, sizeof(s->inputbuf) - 1 );
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343 PT_INIT( &s->outputpt );
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344 s->state = STATE_WAITING;
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346 /* timer_set(&s->timer, CLOCK_SECOND * 100);*/
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348 handle_connection( s );
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350 else if( s != NULL )
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355 if( s->timer >= 20 )
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365 handle_connection( s );
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373 /*---------------------------------------------------------------------------*/
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376 * \brief Initialize the web server
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378 * This function initializes the web server and should be
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379 * called at system boot-up.
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381 void httpd_init( void )
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383 uip_listen( HTONS(80) );
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386 /*---------------------------------------------------------------------------*/
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