src/server/daemon/webserver.c

Fri, 28 Jun 2013 14:52:35 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Fri, 28 Jun 2013 14:52:35 +0200
changeset 81
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parent 73
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child 85
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permissions
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preparation for admin interface

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1 /*
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2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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3 *
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4 * Copyright 2013 Olaf Wintermann. All rights reserved.
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5 *
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6 * Redistribution and use in source and binary forms, with or without
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7 * modification, are permitted provided that the following conditions are met:
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8 *
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9 * 1. Redistributions of source code must retain the above copyright
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10 * notice, this list of conditions and the following disclaimer.
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11 *
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12 * 2. Redistributions in binary form must reproduce the above copyright
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13 * notice, this list of conditions and the following disclaimer in the
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14 * documentation and/or other materials provided with the distribution.
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15 *
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16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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26 * POSSIBILITY OF SUCH DAMAGE.
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27 */
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28
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29
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30 #ifdef __gnu_linux__
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31 #define _GNU_SOURCE
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32 #endif
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33
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34 #include <stdio.h>
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35 #include <stdlib.h>
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36 #include <dlfcn.h>
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37 #include <grp.h>
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38 #include <sys/types.h>
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39 #include <sys/stat.h>
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40
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41 #include "../public/nsapi.h"
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42 #include "../public/auth.h"
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43 #include "../util/systhr.h"
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44 #include "../util/io.h"
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45 #include "../util/util.h"
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47 #include "func.h"
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48 #include "config.h"
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49 #include "configmanager.h"
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50 #include "httplistener.h"
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51 #include "webserver.h"
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52 #include "log.h"
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53 #include "auth.h"
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54
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55 extern struct FuncStruct webserver_funcs[];
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56
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57 static RestartCallback *atrestart;
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59 int webserver_init() {
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60 // init NSPR
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61 systhread_init("webserver");
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62
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63 // init NSAPI functions
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64 func_init();
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65 add_functions(webserver_funcs);
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66
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67 // load init.conf
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68 if(load_init_conf("config/init.conf")) {
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69 return -1;
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70 }
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72 // load server.conf
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73 init_configuration_manager();
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74 if(cfgmgr_load_config() != 0) {
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75 fprintf(stderr, "Cannot load configuration\n");
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76 return -1;
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77 }
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78
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79 // init caches
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80 auth_cache_init();
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81
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82 // create tmp dir and pid file
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83 ServerConfiguration *cfg = cfgmgr_get_server_config();
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84 char *mkdir_cmd = NULL;
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85 asprintf(&mkdir_cmd, "mkdir -p %s", cfg->tmp.ptr);
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86 system(mkdir_cmd);
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87 free(mkdir_cmd);
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88
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89 char *pid_file_path = NULL;
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90 asprintf(&pid_file_path, "%s/pid", cfg->tmp.ptr);
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91 FILE *pidfile = fopen(pid_file_path, "w");
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92 pid_t pid = getpid();
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93 fprintf(pidfile, "%d", pid);
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94 fclose(pidfile);
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95 free(pid_file_path);
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96
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97 // set global vars
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98 conf_global_vars_s *vars = conf_getglobals();
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99
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100 uid_t ws_uid = geteuid();
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101 setpwent();
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102 char *pwbuf = malloc(DEF_PWBUF);
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103 vars->Vuserpw = malloc(sizeof(struct passwd));
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104 if(cfg->user.ptr) {
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105 if(!util_getpwnam(cfg->user.ptr, vars->Vuserpw, pwbuf, DEF_PWBUF)) {
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106 log_ereport(
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107 LOG_MISCONFIG,
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108 "user %s does not exist!",
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109 cfg->user.ptr);
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110 free(vars->Vuserpw);
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111 vars->Vuserpw = NULL;
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112 }
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113 } else {
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114 if(!util_getpwuid(ws_uid, vars->Vuserpw, pwbuf, DEF_PWBUF)) {
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115 log_ereport(LOG_FAILURE, "webserver_init: cannot get passwd data");
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116 free(vars->Vuserpw);
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117 vars->Vuserpw = NULL;
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118 }
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119 }
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120 free(pwbuf);
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121 if(!vars->Vuserpw) {
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122 log_ereport(LOG_WARN, "globalvars->Vuserpw is null");
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123 }
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124
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125 if(cfg->user.ptr) {
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126 char *pwbuf = malloc(DEF_PWBUF);
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127 vars->Vuserpw = malloc(sizeof(struct passwd));
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128 // open user database
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129 //setpwent();
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130 if(!util_getpwnam(cfg->user.ptr, vars->Vuserpw, pwbuf, DEF_PWBUF)) {
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131 log_ereport(
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132 LOG_MISCONFIG,
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133 "user %s does not exist!",
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134 cfg->user.ptr);
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135 free(vars->Vuserpw);
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136 vars->Vuserpw = NULL;
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137 }
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138 free(pwbuf);
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139 //endpwent(); // TODO: close or not?
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140 }
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141
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142 // change uid
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143 if(vars->Vuserpw && ws_uid == 0) {
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144 // a webserver user is set and we are root
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145
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146 if(setgid(vars->Vuserpw->pw_gid) != 0) {
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147 log_ereport(
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148 LOG_FAILURE,
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149 "setgid(%d) failed",
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150 vars->Vuserpw->pw_gid);
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151 } else {
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152 // setgid was successful
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153 // we need to call initgroups to have all group permissions
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154 if(initgroups(vars->Vuserpw->pw_name, vars->Vuserpw->pw_gid)!=0) {
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155 log_ereport(LOG_FAILURE, "initgroups failed");
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156 }
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157 }
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158
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159 // change the uid
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160 if(setuid(vars->Vuserpw->pw_uid)) {
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161 log_ereport(
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162 LOG_FAILURE,
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163 "setuid(%d) failed",
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164 vars->Vuserpw->pw_uid);
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165 }
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166 } else if(vars->Vuserpw) {
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167 log_ereport(
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168 LOG_WARN,
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169 "server must be started as root to change uid");
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170 }
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171
1
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172 return 0;
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173 }
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174
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175 int webserver_run() {
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176 printf("webserver_run\n");
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177
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178 // start all http listener
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179 if(start_all_listener() != 0) {
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180 fprintf(stderr, "Error: Cannot start http listener\n");
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181 }
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182
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183 return 0;
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184 }
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185
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186 void webserver_shutdown() {
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187 printf("webserver_shutdown\n");
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188
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189 // execute restart callbacks
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190 RestartCallback *re = atrestart;
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191 while(re) {
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192 re->func(re->data);
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193 re = re->next;
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194 }
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195 }
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196
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197 void webserver_atrestart(void (*fn)(void *), void *data) {
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198 RestartCallback *cb = malloc(sizeof(RestartCallback));
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199 cb->func = fn;
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200 cb->data = data;
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201 cb->next = NULL;
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202
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203 if(atrestart) {
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204 RestartCallback *elm = atrestart;
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205 while(elm) {
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206 if(!elm->next) {
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207 elm->next = cb;
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208 break;
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209 }
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210 elm = elm->next;
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211 }
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212 } else {
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213 atrestart = cb;
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214 }
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215 }
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216
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217 int nsapi_runtime_version() {
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218 return 303;
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219 }

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