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annotate libfdcore/core.c @ 1098:f38d77f9cfd3

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Initial implementation of the hook mechanism
author Sebastien Decugis <sdecugis@freediameter.net>
date Thu, 09 May 2013 11:59:34 +0800
parents 7d7266115a34
children 96f2051215c8
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 /*********************************************************************************************************
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2 * Software License Agreement (BSD License) *
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3 * Author: Sebastien Decugis <sdecugis@freediameter.net> *
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4 * *
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5 * Copyright (c) 2013, WIDE Project and NICT *
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6 * All rights reserved. *
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7 * *
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8 * Redistribution and use of this software in source and binary forms, with or without modification, are *
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9 * permitted provided that the following conditions are met: *
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10 * *
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11 * * Redistributions of source code must retain the above *
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12 * copyright notice, this list of conditions and the *
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13 * following disclaimer. *
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14 * *
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15 * * Redistributions in binary form must reproduce the above *
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16 * copyright notice, this list of conditions and the *
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17 * following disclaimer in the documentation and/or other *
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18 * materials provided with the distribution. *
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19 * *
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20 * * Neither the name of the WIDE Project or NICT nor the *
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21 * names of its contributors may be used to endorse or *
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22 * promote products derived from this software without *
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23 * specific prior written permission of WIDE Project and *
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24 * NICT. *
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25 * *
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26 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED *
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27 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A *
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28 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR *
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29 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT *
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30 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS *
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31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR *
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32 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF *
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33 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *
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34 *********************************************************************************************************/
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35
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36 #include "fdcore-internal.h"
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37
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38 GCC_DIAG_OFF("-Wdeprecated-declarations")
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39 #include <gcrypt.h>
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40 GCC_DIAG_ON("-Wdeprecated-declarations")
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41
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42 /* The static configuration structure */
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43 static struct fd_config g_conf;
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44 struct fd_config * fd_g_config = NULL;
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45
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46 /* gcrypt functions to support posix threads */
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47 #ifndef GNUTLS_VERSION_210
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48 GCRY_THREAD_OPTION_PTHREAD_IMPL;
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49 #endif /* GNUTLS_VERSION_210 */
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50
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51 /* Signal extensions when the framework is completely initialized (they are waiting in fd_core_waitstartcomplete()) */
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52 static int is_ready = 0;
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53 static pthread_mutex_t is_ready_mtx = PTHREAD_MUTEX_INITIALIZER;
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54 static pthread_cond_t is_ready_cnd = PTHREAD_COND_INITIALIZER;
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55
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56 static int signal_framework_ready(void)
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57 {
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58 TRACE_ENTRY("");
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59 CHECK_POSIX( pthread_mutex_lock( &is_ready_mtx ) );
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60 is_ready = 1;
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61 CHECK_POSIX( pthread_cond_broadcast( &is_ready_cnd ) );
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62 CHECK_POSIX( pthread_mutex_unlock( &is_ready_mtx ) );
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63 return 0;
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64 }
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65
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66 /* Thread that process incoming events on the main queue -- and terminates the framework when requested */
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67 static pthread_t core_runner = (pthread_t)NULL;
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68
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69 /* How the thread is terminated */
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70 enum core_mode {
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71 CORE_MODE_EVENTS,
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72 CORE_MODE_IMMEDIATE
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73 };
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74
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75 static void * core_runner_thread(void * arg)
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76 {
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77 if (arg && (*(int *)arg == CORE_MODE_IMMEDIATE))
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78 goto end;
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79
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80 fd_log_threadname("fD Core Runner");
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81
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82 /* Handle events incoming on the main event queue */
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83 while (1) {
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84 int code; size_t sz; void * data;
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85 CHECK_FCT_DO( fd_event_get(fd_g_config->cnf_main_ev, &code, &sz, &data), break );
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86 switch (code) {
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87 case FDEV_TRIGGER:
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88 {
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89 int tv, *p;
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90 CHECK_PARAMS_DO( sz == sizeof(int),
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91 {
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92 TRACE_DEBUG(NONE, "Internal error: got FDEV_TRIGGER without trigger value!");
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93 ASSERT(0);
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94 goto end;
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95 } );
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96 p = data;
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97 tv = *p;
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98 free(p);
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99 CHECK_FCT_DO( fd_event_trig_call_cb(tv), goto end );
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100 }
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101 break;
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102
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103 case FDEV_TERMINATE:
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104 goto end;
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105
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106 default:
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107 TRACE_DEBUG(INFO, "Unexpected event in the main event queue (%d), ignored.", code);
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108 }
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109 }
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110
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111 end:
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112 TRACE_DEBUG(INFO, FD_PROJECT_BINARY " framework is stopping...");
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113 fd_log_threadname("fD Core Shutdown");
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114
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115 /* cleanups */
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116 CHECK_FCT_DO( fd_servers_stop(), /* Stop accepting new connections */ );
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117 CHECK_FCT_DO( fd_rtdisp_cleanstop(), /* Stop dispatch thread(s) after a clean loop if possible */ );
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118 CHECK_FCT_DO( fd_peer_fini(), /* Stop all connections */ );
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119 CHECK_FCT_DO( fd_rtdisp_fini(), /* Stop routing threads and destroy routing queues */ );
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120
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121 CHECK_FCT_DO( fd_ext_term(), /* Cleanup all extensions */ );
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122 CHECK_FCT_DO( fd_rtdisp_cleanup(), /* destroy remaining handlers */ );
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123
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124 GNUTLS_TRACE( gnutls_global_deinit() );
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125
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126 CHECK_FCT_DO( fd_conf_deinit(), );
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127
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128 CHECK_FCT_DO( fd_event_trig_fini(), );
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129
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130 fd_log_debug(FD_PROJECT_BINARY " framework is terminated.");
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131
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132 fd_libproto_fini();
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133
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134 return NULL;
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135 }
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136
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137 /*********************************/
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138 /* Public interfaces */
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139
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140 /* Return a string describing the version of the library */
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141 const char *fd_core_version(void)
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142 {
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143 return _stringize(FD_PROJECT_VERSION_MAJOR) "." _stringize(FD_PROJECT_VERSION_MINOR) "." _stringize(FD_PROJECT_VERSION_REV);
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144 }
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145
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146 /* Initialize the libfdcore internals. This also initializes libfdproto */
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147 int fd_core_initialize(void)
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148 {
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149 int ret;
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150
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151 /* Initialize the library -- must come first since it initializes the debug facility */
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152 ret = fd_libproto_init();
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153 if (ret != 0) {
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154 fprintf(stderr, "Unable to initialize libfdproto: %s\n", strerror(ret));
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155 return ret;
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156 }
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157
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158 LOG_D("libfdproto initialized.");
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159
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160 /* Name this thread */
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161 fd_log_threadname("Main");
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162
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163 /* Initialize gcrypt and gnutls */
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164 #ifndef GNUTLS_VERSION_210
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165 GNUTLS_TRACE( (void) gcry_control (GCRYCTL_SET_THREAD_CBS, &gcry_threads_pthread) );
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166 GNUTLS_TRACE( (void) gcry_control (GCRYCTL_ENABLE_QUICK_RANDOM, 0) );
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167 #endif /* GNUTLS_VERSION_210 */
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168 CHECK_GNUTLS_DO( gnutls_global_init(), return EINVAL );
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169 if ( ! gnutls_check_version(GNUTLS_VERSION) ) {
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170 TRACE_ERROR( "The GNUTLS library is too old; found '%s', need '" GNUTLS_VERSION "'", gnutls_check_version(NULL));
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171 return EINVAL;
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172 } else {
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173 #ifdef GNUTLS_VERSION_210
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174 TRACE_DEBUG(INFO, "libgnutls '%s' initialized.", gnutls_check_version(NULL) );
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175 #else /* GNUTLS_VERSION_210 */
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176 TRACE_DEBUG(INFO, "libgnutls '%s', libgcrypt '%s', initialized.", gnutls_check_version(NULL), gcry_check_version(NULL) );
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177 #endif /* GNUTLS_VERSION_210 */
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178 }
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179
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180 /* Initialize the config with default values */
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181 memset(&g_conf, 0, sizeof(struct fd_config));
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182 fd_g_config = &g_conf;
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183 CHECK_FCT( fd_conf_init() );
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184
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185 /* Add definitions of the base protocol */
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186 CHECK_FCT( fd_dict_base_protocol(fd_g_config->cnf_dict) );
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187
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188 /* Initialize some modules */
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189 CHECK_FCT( fd_hooks_init() );
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190 CHECK_FCT( fd_queues_init() );
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191 CHECK_FCT( fd_msg_init() );
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192 CHECK_FCT( fd_sess_start() );
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193 CHECK_FCT( fd_p_expi_init() );
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194
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195 /* Next thing is to parse the config, leave this for a different function */
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196 return 0;
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197 }
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198
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199 /* Parse the freeDiameter.conf configuration file, load the extensions */
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200 int fd_core_parseconf(const char * conffile)
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201 {
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202 char * buf = NULL, *b;
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203 size_t len = 0, offset=0;
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204
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205
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206 TRACE_ENTRY("%p", conffile);
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207
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208 /* Conf file */
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209 if (conffile)
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210 fd_g_config->cnf_file = conffile; /* otherwise, we use the default name */
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211
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212 CHECK_FCT( fd_conf_parse() );
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213
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214 /* The following module use data from the configuration */
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215 CHECK_FCT( fd_rtdisp_init() );
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216
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217 /* Now, load all dynamic extensions */
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218 CHECK_FCT( fd_ext_load() );
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219
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220 /* Display configuration */
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221 b = fd_conf_dump(&buf, &len, NULL);
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222 LOG_N("%s\n", b ?: "Error during configuration dump...");
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223
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224 /* Display registered triggers for FDEV_TRIGGER */
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225 b = fd_event_trig_dump(&buf, &len, &offset);
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226 if (!b || offset) {
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227 LOG_N("%s\n", b ?: "Error during triggers dump...");
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228 }
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229
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230 free(buf);
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231
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232 return 0;
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233 }
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234
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235 /* For threads that would need to wait complete start of the framework (ex: in extensions) */
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236 int fd_core_waitstartcomplete(void)
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237 {
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238 int ret = 0;
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239
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240 TRACE_ENTRY("");
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241
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242 CHECK_POSIX( pthread_mutex_lock( &is_ready_mtx ) );
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243 pthread_cleanup_push( fd_cleanup_mutex, &is_ready_mtx );
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244
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245 while (!ret && !is_ready) {
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246 CHECK_POSIX_DO( ret = pthread_cond_wait( &is_ready_cnd, &is_ready_mtx ), );
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247 }
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248
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249 pthread_cleanup_pop( 0 );
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250 CHECK_POSIX( pthread_mutex_unlock( &is_ready_mtx ) );
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251
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252 return ret;
658
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253 }
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254
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255 /* Start the server & client threads */
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256 int fd_core_start(void)
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257 {
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258 /* Start server threads */
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259 CHECK_FCT( fd_servers_start() );
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260
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261 /* Start the peer state machines */
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262 CHECK_FCT( fd_psm_start() );
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263
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264 /* Start the core runner thread that handles main events (until shutdown) */
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265 CHECK_POSIX( pthread_create(&core_runner, NULL, core_runner_thread, NULL) );
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266
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267 /* Unlock threads waiting into fd_core_waitstartcomplete */
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268 CHECK_FCT( signal_framework_ready() );
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269
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270 /* Ok, everything is running now... */
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271 return 0;
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272 }
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273
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274
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275 /* Initialize shutdown of the framework. This is not blocking. */
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276 int fd_core_shutdown(void)
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277 {
686
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278 if (core_runner != (pthread_t)NULL) {
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279 /* Signal the framework to terminate */
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280 CHECK_FCT( fd_event_send(fd_g_config->cnf_main_ev, FDEV_TERMINATE, 0, NULL) );
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281 } else {
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282 /* The framework was maybe not fully initialized (ex: tests) */
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283 enum core_mode arg = CORE_MODE_IMMEDIATE;
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284 (void) core_runner_thread(&arg);
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285 }
658
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286
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287 return 0;
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288 }
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289
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290
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291 /* Wait for the shutdown to be complete -- this must always be called after fd_core_shutdown to reclaim some resources. */
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292 int fd_core_wait_shutdown_complete(void)
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293 {
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294 int ret;
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295 void * th_ret = NULL;
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296
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297 if (core_runner != (pthread_t)NULL) {
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298 /* Just wait for core_runner_thread to complete and return gracefully */
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299 ret = pthread_join(core_runner, &th_ret);
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300 if (ret != 0) {
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301 TRACE_ERROR( "Unable to wait for main framework thread termination: %s", strerror(ret));
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302 return ret;
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303 }
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304 }
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305
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306 return 0;
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307 }
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308
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309
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310
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311
"Welcome to our mercurial repository"