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annotate extensions/rt_default/rt_default.c @ 1554:566bb46cc73f

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Updated copyright information
author Sebastien Decugis <sdecugis@freediameter.net>
date Tue, 06 Oct 2020 21:34:53 +0800
parents cec0812038bb
children
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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) 2019, 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 /*
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37 * Configurable routing of messages for freeDiameter.
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38 */
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39
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40 #include <signal.h>
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41
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42 #include "rt_default.h"
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43
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44 #define MODULE_NAME "rt_default"
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45
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46 #include <pthread.h>
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47
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48 static pthread_rwlock_t rtd_lock;
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49
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50 static char *rtd_config_file;
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51
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52 /* The callback called on new messages */
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53 static int rtd_out(void * cbdata, struct msg ** pmsg, struct fd_list * candidates)
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54 {
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55 struct msg * msg = *pmsg;
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56 TRACE_ENTRY("%p %p %p", cbdata, msg, candidates);
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57 int ret;
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58
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59 CHECK_PARAMS(msg && candidates);
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60
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61 if (pthread_rwlock_rdlock(&rtd_lock) != 0) {
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62 fd_log_notice("%s: read-lock failed, skipping handler", MODULE_NAME);
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63 return 0;
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64 }
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65 /* Simply pass it to the appropriate function */
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66 if (FD_IS_LIST_EMPTY(candidates)) {
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67 ret = 0;
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68 } else {
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69 ret = rtd_process( msg, candidates );
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70 }
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71 if (pthread_rwlock_unlock(&rtd_lock) != 0) {
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72 fd_log_notice("%s: read-unlock failed after rtd_out, exiting", MODULE_NAME);
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73 exit(1);
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74 }
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75 return ret;
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76 }
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77
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78 /* handler */
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79 static struct fd_rt_out_hdl * rtd_hdl = NULL;
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80
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81 static volatile int in_signal_handler = 0;
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82
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83 /* signal handler */
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84 static void sig_hdlr(void)
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85 {
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86 if (in_signal_handler) {
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87 fd_log_error("%s: already handling a signal, ignoring new one", MODULE_NAME);
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88 return;
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89 }
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90 in_signal_handler = 1;
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91
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92 if (pthread_rwlock_wrlock(&rtd_lock) != 0) {
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93 fd_log_error("%s: locking failed, aborting config reload", MODULE_NAME);
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94 return;
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95 }
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96 rtd_conf_reload(rtd_config_file);
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97 if (pthread_rwlock_unlock(&rtd_lock) != 0) {
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98 fd_log_error("%s: unlocking failed after config reload, exiting", MODULE_NAME);
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99 exit(1);
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100 }
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101
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102 fd_log_notice("%s: reloaded configuration", MODULE_NAME);
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103
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104 in_signal_handler = 0;
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105 }
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106
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107
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108 /* entry point */
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109 static int rtd_entry(char * conffile)
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110 {
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111 TRACE_ENTRY("%p", conffile);
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112
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113 rtd_config_file = conffile;
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114 pthread_rwlock_init(&rtd_lock, NULL);
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115
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116 if (pthread_rwlock_wrlock(&rtd_lock) != 0) {
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117 fd_log_notice("%s: write-lock failed, aborting", MODULE_NAME);
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118 return EDEADLK;
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119 }
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120
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121 /* Initialize the repo */
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122 CHECK_FCT( rtd_init() );
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123
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124 /* Parse the configuration file */
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125 CHECK_FCT( rtd_conf_handle(conffile) );
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126
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127 if (pthread_rwlock_unlock(&rtd_lock) != 0) {
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128 fd_log_notice("%s: write-unlock failed, aborting", MODULE_NAME);
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129 return EDEADLK;
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130 }
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131
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132 /* Register reload callback */
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133 CHECK_FCT(fd_event_trig_regcb(SIGUSR1, MODULE_NAME, sig_hdlr));
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134
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135 #if 0
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136 /* Dump the rules */
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137 rtd_dump();
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138 #endif /* 0 */
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139
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140 /* Register the callback */
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141 CHECK_FCT( fd_rt_out_register( rtd_out, NULL, 5, &rtd_hdl ) );
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142
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143 /* We're done */
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144 return 0;
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145 }
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146
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147 /* Unload */
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148 void fd_ext_fini(void)
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149 {
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150 TRACE_ENTRY();
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151
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152 /* Unregister the cb */
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153 CHECK_FCT_DO( fd_rt_out_unregister ( rtd_hdl, NULL ), /* continue */ );
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154
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155 /* Destroy the data */
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156 rtd_fini();
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157
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158 pthread_rwlock_destroy(&rtd_lock);
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159
167
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160 /* Done */
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161 return ;
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162 }
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163
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164 EXTENSION_ENTRY(MODULE_NAME, rtd_entry);
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