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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24 * Copyright (c) 2004, Adam Dunkels.
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25 * All rights reserved.
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27 * Redistribution and use in source and binary forms, with or without
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28 * modification, are permitted provided that the following conditions
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30 * 1. Redistributions of source code must retain the above copyright
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31 * notice, this list of conditions and the following disclaimer.
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32 * 2. Redistributions in binary form must reproduce the above copyright
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33 * notice, this list of conditions and the following disclaimer in the
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34 * documentation and/or other materials provided with the distribution.
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35 * 3. Neither the name of the Institute nor the names of its contributors
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36 * may be used to endorse or promote products derived from this software
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37 * without specific prior written permission.
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39 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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40 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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42 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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43 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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44 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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45 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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46 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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47 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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48 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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51 * This file is part of the uIP TCP/IP stack.
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53 * Author: Adam Dunkels <adam@sics.se>
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55 * $Id: httpd.c,v 1.2 2006/06/11 21:46:38 adam Exp $
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60 #include "httpd-fs.h"
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61 #include "httpd-cgi.h"
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62 #include "http-strings.h"
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66 #define STATE_WAITING 0
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67 #define STATE_OUTPUT 1
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70 #define ISO_space 0x20
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71 #define ISO_bang 0x21
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72 #define ISO_percent 0x25
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73 #define ISO_period 0x2e
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74 #define ISO_slash 0x2f
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75 #define ISO_colon 0x3a
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78 /*---------------------------------------------------------------------------*/
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79 static unsigned short
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80 generate_part_of_file(void *state)
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82 struct httpd_state *s = (struct httpd_state *)state;
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84 if(s->file.len > uip_mss()) {
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87 s->len = s->file.len;
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89 memcpy(uip_appdata, s->file.data, s->len);
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93 /*---------------------------------------------------------------------------*/
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95 PT_THREAD(send_file(struct httpd_state *s))
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97 PSOCK_BEGIN(&s->sout);
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100 PSOCK_GENERATOR_SEND(&s->sout, generate_part_of_file, s);
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101 s->file.len -= s->len;
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102 s->file.data += s->len;
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103 } while(s->file.len > 0);
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105 PSOCK_END(&s->sout);
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107 /*---------------------------------------------------------------------------*/
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109 PT_THREAD(send_part_of_file(struct httpd_state *s))
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111 PSOCK_BEGIN(&s->sout);
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113 PSOCK_SEND(&s->sout, s->file.data, s->len);
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115 PSOCK_END(&s->sout);
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117 /*---------------------------------------------------------------------------*/
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119 next_scriptstate(struct httpd_state *s)
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122 p = strchr(s->scriptptr, ISO_nl) + 1;
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123 s->scriptlen -= (unsigned short)(p - s->scriptptr);
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126 /*---------------------------------------------------------------------------*/
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128 PT_THREAD(handle_script(struct httpd_state *s))
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132 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 &&
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139 *(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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143 httpd_fs_open(s->scriptptr + 1, &s->file);
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144 PT_WAIT_THREAD(&s->scriptpt, send_file(s));
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146 PT_WAIT_THREAD(&s->scriptpt,
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147 httpd_cgi(s->scriptptr)(s, s->scriptptr));
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149 next_scriptstate(s);
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151 /* The script is over, so we reset the pointers and continue
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152 sending the rest of the file. */
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153 s->file.data = s->scriptptr;
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154 s->file.len = s->scriptlen;
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156 /* See if we find the start of script marker in the block of HTML
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159 if(s->file.len > uip_mss()) {
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160 s->len = uip_mss();
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162 s->len = s->file.len;
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165 if(*s->file.data == ISO_percent) {
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166 ptr = strchr(s->file.data + 1, ISO_percent);
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168 ptr = strchr(s->file.data, ISO_percent);
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171 ptr != s->file.data) {
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172 s->len = (int)(ptr - s->file.data);
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173 if(s->len >= uip_mss()) {
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174 s->len = uip_mss();
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177 PT_WAIT_THREAD(&s->scriptpt, send_part_of_file(s));
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178 s->file.data += s->len;
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179 s->file.len -= s->len;
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184 PT_END(&s->scriptpt);
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186 /*---------------------------------------------------------------------------*/
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188 PT_THREAD(send_headers(struct httpd_state *s, const char *statushdr))
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192 PSOCK_BEGIN(&s->sout);
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194 PSOCK_SEND_STR(&s->sout, statushdr);
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196 ptr = strrchr(s->filename, ISO_period);
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198 PSOCK_SEND_STR(&s->sout, http_content_type_binary);
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199 } else if(strncmp(http_html, ptr, 5) == 0 ||
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200 strncmp(http_shtml, ptr, 6) == 0) {
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201 PSOCK_SEND_STR(&s->sout, http_content_type_html);
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202 } else if(strncmp(http_css, ptr, 4) == 0) {
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203 PSOCK_SEND_STR(&s->sout, http_content_type_css);
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204 } else if(strncmp(http_png, ptr, 4) == 0) {
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205 PSOCK_SEND_STR(&s->sout, http_content_type_png);
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206 } else if(strncmp(http_gif, ptr, 4) == 0) {
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207 PSOCK_SEND_STR(&s->sout, http_content_type_gif);
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208 } else if(strncmp(http_jpg, ptr, 4) == 0) {
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209 PSOCK_SEND_STR(&s->sout, http_content_type_jpg);
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211 PSOCK_SEND_STR(&s->sout, http_content_type_plain);
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213 PSOCK_END(&s->sout);
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215 /*---------------------------------------------------------------------------*/
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217 PT_THREAD(handle_output(struct httpd_state *s))
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221 PT_BEGIN(&s->outputpt);
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223 if(!httpd_fs_open(s->filename, &s->file)) {
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224 httpd_fs_open(http_404_html, &s->file);
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225 strcpy(s->filename, http_404_html);
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226 PT_WAIT_THREAD(&s->outputpt,
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229 PT_WAIT_THREAD(&s->outputpt,
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232 PT_WAIT_THREAD(&s->outputpt,
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235 ptr = strchr(s->filename, ISO_period);
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236 if(ptr != NULL && strncmp(ptr, http_shtml, 6) == 0) {
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237 PT_INIT(&s->scriptpt);
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238 PT_WAIT_THREAD(&s->outputpt, handle_script(s));
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240 PT_WAIT_THREAD(&s->outputpt,
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244 PSOCK_CLOSE(&s->sout);
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245 PT_END(&s->outputpt);
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247 /*---------------------------------------------------------------------------*/
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249 PT_THREAD(handle_input(struct httpd_state *s))
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251 PSOCK_BEGIN(&s->sin);
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253 PSOCK_READTO(&s->sin, ISO_space);
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256 if(strncmp(s->inputbuf, http_get, 4) != 0) {
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257 PSOCK_CLOSE_EXIT(&s->sin);
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259 PSOCK_READTO(&s->sin, ISO_space);
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261 if(s->inputbuf[0] != ISO_slash) {
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262 PSOCK_CLOSE_EXIT(&s->sin);
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265 if(s->inputbuf[1] == ISO_space) {
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266 strncpy(s->filename, http_index_html, sizeof(s->filename));
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269 s->inputbuf[PSOCK_DATALEN(&s->sin) - 1] = 0;
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271 /* Process any form input being sent to the server. */
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273 extern void vApplicationProcessFormInput( char *pcInputString, long xInputLength );
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274 vApplicationProcessFormInput( s->inputbuf, PSOCK_DATALEN(&s->sin) );
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277 strncpy(s->filename, &s->inputbuf[0], sizeof(s->filename));
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280 /* httpd_log_file(uip_conn->ripaddr, s->filename);*/
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282 s->state = STATE_OUTPUT;
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285 PSOCK_READTO(&s->sin, ISO_nl);
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287 if(strncmp(s->inputbuf, http_referer, 8) == 0) {
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288 s->inputbuf[PSOCK_DATALEN(&s->sin) - 2] = 0;
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289 /* httpd_log(&s->inputbuf[9]);*/
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293 PSOCK_END(&s->sin);
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295 /*---------------------------------------------------------------------------*/
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297 handle_connection(struct httpd_state *s)
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300 if(s->state == STATE_OUTPUT) {
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304 /*---------------------------------------------------------------------------*/
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306 httpd_appcall(void)
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308 struct httpd_state *s = (struct httpd_state *)&(uip_conn->appstate);
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310 if(uip_closed() || uip_aborted() || uip_timedout()) {
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311 } else if(uip_connected()) {
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312 PSOCK_INIT(&s->sin, s->inputbuf, sizeof(s->inputbuf) - 1);
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313 PSOCK_INIT(&s->sout, s->inputbuf, sizeof(s->inputbuf) - 1);
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314 PT_INIT(&s->outputpt);
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315 s->state = STATE_WAITING;
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316 /* timer_set(&s->timer, CLOCK_SECOND * 100);*/
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318 handle_connection(s);
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319 } else if(s != NULL) {
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322 if(s->timer >= 20) {
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328 handle_connection(s);
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333 /*---------------------------------------------------------------------------*/
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335 * \brief Initialize the web server
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337 * This function initializes the web server and should be
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338 * called at system boot-up.
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343 uip_listen(HTONS(80));
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345 /*---------------------------------------------------------------------------*/
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