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annotate include/waaad/waaad.h @ 400:22f29007b931

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Detect when extensions are loaded several times (not allowed)
author Sebastien Decugis <sdecugis@nict.go.jp>
date Tue, 02 Jun 2009 14:49:37 +0900
parents e86dba02630a
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@nict.go.jp> *
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4 * *
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5 * Copyright (c) 2009, 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 * This file contains the full definition of the API to be used between waaad daemon and its extensions.
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38 *
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39 * The extensions are loaded by the function ext_load in the extension.c file in the daemon.
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40 *
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41 * If you are writing a new extension, you can find some models in the extensions directory.
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42
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43 * INSTRUCTIONS FOR EXTENSIONS:
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44 *
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45 * - Include this file as #include <waaad/waaad.h>, after defining IN_EXTENSION symbol.
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46 *
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47 * - One (and only one) of your extension file must also define the DECLARE_API_POINTERS
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48 * symbol before including this file.
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49 *
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50 * - The extension must have a function called waaad_ext_init with the following prototype:
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51 * int waaad_ext_init(waaad_api_t * api, char * conffile);
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52 * This function will be called by waaad daemon when the extension is loaded.
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53 * See the content of the macro EXTENSION_API_INIT for example of such function (see bellow).
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54 *
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55 * - The following macro may be used in your extension to define the waaad_ext_init function to standard behavior:
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56 * EXTENSION_API_INIT(flags, function, name)
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57 * flags = combination of flags to tell what modules are needed by the extension.
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58 * function = function to call once API is registered. prototype is: int function(char * conffile);
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59 * where conffile is the name of a configuration file for this extension to parse.
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60 * name = name of the extension
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61 * If you use this macro, you need to #include <stdio.h> and <errno.h>
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62 *
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63 * - The extension may also provide a function called waaad_ext_fini with this prototype:
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64 * void waaad_ext_fini (void);
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65 * This function, if present, will be called when the daemon terminate cleanly.
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66 */
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67
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68 #ifndef _WAAAD_API_H
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69 #define _WAAAD_API_H
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70
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71 /* Include all the modules API definitions */
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72 #include <waaad/log-api.h>
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73 #include <waaad/dictionary-api.h>
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74 #include <waaad/conf-api.h>
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75 #include <waaad/peer-api.h>
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76 #include <waaad/message-api.h>
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77 #include <waaad/routing-api.h>
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78 #include <waaad/session-api.h>
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79 #include <waaad/dispatch-api.h>
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80 #include <waaad/security-api.h>
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84 /* ********************************** */
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85
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86 /* The version of this API format. Increment each time you change the structure waaad_api_t */
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87 #define WAAAD_API_VER 1
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88
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89 /* Now define the structure type that will be passed to the extension initializer */
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90 typedef struct {
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91 int version; /* The global version of this API. Must be WAAAD_API_VER */
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92 api_log_t log;
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93 api_dict_t dictionary;
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94 api_conf_t conf;
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95 api_peer_t peer;
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96 api_msg_t msg;
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97 api_rt_t rt;
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98 api_sess_t session;
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99 api_disp_t dispatch;
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100 api_sec_t security;
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101 } waaad_api_t;
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102
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103 /* ********************************** */
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104
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105 /* The code bellow this line is only used to load the API in an extension and check the API number version. */
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106 #ifdef IN_EXTENSION
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107
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108 #include <stdio.h>
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109 #include <errno.h>
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110
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111 typedef struct {
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112 size_t length;
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113 int version;
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114 } sub_api_header_t;
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117 #define API_MODULE_ALL 0xffffffff /* Load the complete API in the extension, safest setting */
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118 #define API_MODULE_LOG 0x00000001 /* Load the log API in the extension */
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119 #define API_MODULE_DICTIONARY 0x00000002 /* Load the dictionary API in the extension */
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120 #define API_MODULE_CONF 0x00000004 /* Load the configuration API in the extension */
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121 #define API_MODULE_PEER 0x00000008 /* Load the peer API in the extension */
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122 #define API_MODULE_MSG 0x00000010 /* Load the message API in the extension */
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123 #define API_MODULE_RT 0x00000020 /* Load the routing API in the extension */
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124 #define API_MODULE_SESSION 0x00000040 /* Load the session API in the extension */
36
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125 #define API_MODULE_DISPATCH 0x00000080 /* Load the dispatch API in the extension */
43
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126 #define API_MODULE_SECURITY 0x00000100 /* Load the security API in the extension */
2
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127
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128
355
b811859f9963 Added extensions management in radius_gw
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129 #define EXTENSION_API_INIT_INTERN( flags, name, api ) { \
2
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130 sub_api_header_t * hdr; \
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131 char * buffer = (char *)api; \
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132 int index = 0; \
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133 \
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134 if (api->version != WAAAD_API_VER) { \
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135 /* Unable to parse this API, do not continue */ \
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136 fprintf(stderr, \
163
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diff changeset
137 "[%s] Incompatible API version, please recompile the extension.\n", (name)); \
2
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138 return EINVAL; \
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139 } \
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140 \
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141 index += sizeof(int); \
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142 \
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143 hdr = (sub_api_header_t *) &buffer[index]; \
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144 index += hdr->length; \
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145 \
163
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diff changeset
146 if ( (flags) & API_MODULE_LOG ) { \
2
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147 g_api_log = (api_log_t *)hdr; \
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148 if (g_api_log->version != WAAAD_API_LOG_VER) { \
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149 /* Unable to parse this API, do not continue */ \
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150 fprintf(stderr, \
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151 "[%s] Incompatible log API version, please recompile the extension.\n", \
163
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diff changeset
152 (name)); \
2
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153 return EINVAL; \
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154 } \
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155 } \
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156 \
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157 hdr = (sub_api_header_t *) &buffer[index]; \
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158 index += hdr->length; \
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159 \
163
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diff changeset
160 if ( (flags) & API_MODULE_DICTIONARY ) { \
2
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161 g_api_dict = (api_dict_t *)hdr; \
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162 if (g_api_dict->version != WAAAD_API_DICT_VER) { \
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163 /* Unable to parse this API, do not continue */ \
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164 fprintf(stderr, \
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165 "[%s] Incompatible dictionary API version, please recompile the extension.\n", \
163
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diff changeset
166 (name)); \
2
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167 return EINVAL; \
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168 } \
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169 } \
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170 \
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171 hdr = (sub_api_header_t *) &buffer[index]; \
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172 index += hdr->length; \
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173 \
163
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diff changeset
174 if ( (flags) & API_MODULE_CONF ) { \
21
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175 g_api_conf = (api_conf_t *)hdr; \
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diff changeset
176 if (g_api_conf->version != WAAAD_API_CONF_VER) { \
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diff changeset
177 /* Unable to parse this API, do not continue */ \
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diff changeset
178 fprintf(stderr, \
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179 "[%s] Incompatible conf API version, please recompile the extension.\n", \
163
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180 (name)); \
21
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181 return EINVAL; \
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182 } \
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183 } \
f28a9cc0e6e1 Fix a bug if extension has several files. Now DECLARE_API_POINTERS must be defined once.
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184 \
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185 hdr = (sub_api_header_t *) &buffer[index]; \
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186 index += hdr->length; \
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diff changeset
187 \
163
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188 if ( (flags) & API_MODULE_PEER ) { \
21
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diff changeset
189 g_api_peer = (api_peer_t *)hdr; \
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diff changeset
190 if (g_api_peer->version != WAAAD_API_PEER_VER) { \
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diff changeset
191 /* Unable to parse this API, do not continue */ \
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diff changeset
192 fprintf(stderr, \
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193 "[%s] Incompatible peer API version, please recompile the extension" \
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194 " or update the initialization in extensions.c.\n", \
163
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diff changeset
195 (name)); \
21
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196 return EINVAL; \
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197 } \
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diff changeset
198 } \
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199 \
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200 hdr = (sub_api_header_t *) &buffer[index]; \
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201 index += hdr->length; \
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diff changeset
202 \
163
14665eb59b34 Tons of cleanups (unfinished)
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diff changeset
203 if ( (flags) & API_MODULE_MSG ) { \
24
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diff changeset
204 g_api_msg = (api_msg_t *)hdr; \
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diff changeset
205 if (g_api_msg->version != WAAAD_API_MSG_VER) { \
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diff changeset
206 /* Unable to parse this API, do not continue */ \
41f0f8549ddf Added skeleton for the messages management
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diff changeset
207 fprintf(stderr, \
41f0f8549ddf Added skeleton for the messages management
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diff changeset
208 "[%s] Incompatible message API version, please recompile the extension" \
41f0f8549ddf Added skeleton for the messages management
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parents: 21
diff changeset
209 " or update the initialization in extensions.c.\n", \
163
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diff changeset
210 (name)); \
24
41f0f8549ddf Added skeleton for the messages management
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diff changeset
211 return EINVAL; \
41f0f8549ddf Added skeleton for the messages management
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diff changeset
212 } \
41f0f8549ddf Added skeleton for the messages management
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diff changeset
213 } \
41f0f8549ddf Added skeleton for the messages management
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diff changeset
214 \
41f0f8549ddf Added skeleton for the messages management
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diff changeset
215 hdr = (sub_api_header_t *) &buffer[index]; \
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diff changeset
216 index += hdr->length; \
41f0f8549ddf Added skeleton for the messages management
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diff changeset
217 \
163
14665eb59b34 Tons of cleanups (unfinished)
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diff changeset
218 if ( (flags) & API_MODULE_RT ) { \
29
48cd40f27f3f Added more information about routing, still incomplete
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diff changeset
219 g_api_rt = (api_rt_t *)hdr; \
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diff changeset
220 if (g_api_rt->version != WAAAD_API_RT_VER) { \
48cd40f27f3f Added more information about routing, still incomplete
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diff changeset
221 /* Unable to parse this API, do not continue */ \
48cd40f27f3f Added more information about routing, still incomplete
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diff changeset
222 fprintf(stderr, \
48cd40f27f3f Added more information about routing, still incomplete
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diff changeset
223 "[%s] Incompatible routing API version, please recompile the extension" \
48cd40f27f3f Added more information about routing, still incomplete
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parents: 24
diff changeset
224 " or update the initialization in extensions.c.\n", \
163
14665eb59b34 Tons of cleanups (unfinished)
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diff changeset
225 (name)); \
29
48cd40f27f3f Added more information about routing, still incomplete
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diff changeset
226 return EINVAL; \
48cd40f27f3f Added more information about routing, still incomplete
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diff changeset
227 } \
48cd40f27f3f Added more information about routing, still incomplete
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diff changeset
228 } \
48cd40f27f3f Added more information about routing, still incomplete
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diff changeset
229 \
48cd40f27f3f Added more information about routing, still incomplete
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diff changeset
230 hdr = (sub_api_header_t *) &buffer[index]; \
48cd40f27f3f Added more information about routing, still incomplete
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diff changeset
231 index += hdr->length; \
48cd40f27f3f Added more information about routing, still incomplete
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diff changeset
232 \
163
14665eb59b34 Tons of cleanups (unfinished)
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diff changeset
233 if ( (flags) & API_MODULE_SESSION ) { \
35
f35a9404cbef Added prototype and explanations for the basical support of Diameter sessions
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diff changeset
234 g_api_session = (api_sess_t *)hdr; \
f35a9404cbef Added prototype and explanations for the basical support of Diameter sessions
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parents: 29
diff changeset
235 if (g_api_session->version != WAAAD_API_SESSION_VER) { \
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diff changeset
236 /* Unable to parse this API, do not continue */ \
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parents: 29
diff changeset
237 fprintf(stderr, \
f35a9404cbef Added prototype and explanations for the basical support of Diameter sessions
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diff changeset
238 "[%s] Incompatible session API version, please recompile the extension" \
f35a9404cbef Added prototype and explanations for the basical support of Diameter sessions
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parents: 29
diff changeset
239 " or update the initialization in extensions.c.\n", \
163
14665eb59b34 Tons of cleanups (unfinished)
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parents: 104
diff changeset
240 (name)); \
35
f35a9404cbef Added prototype and explanations for the basical support of Diameter sessions
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parents: 29
diff changeset
241 return EINVAL; \
f35a9404cbef Added prototype and explanations for the basical support of Diameter sessions
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parents: 29
diff changeset
242 } \
f35a9404cbef Added prototype and explanations for the basical support of Diameter sessions
Sebastien Decugis <sdecugis@nict.go.jp>
parents: 29
diff changeset
243 } \
f35a9404cbef Added prototype and explanations for the basical support of Diameter sessions
Sebastien Decugis <sdecugis@nict.go.jp>
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diff changeset
244 \
f35a9404cbef Added prototype and explanations for the basical support of Diameter sessions
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diff changeset
245 hdr = (sub_api_header_t *) &buffer[index]; \
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246 index += hdr->length; \
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247 \
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248 if ( (flags) & API_MODULE_DISPATCH ) { \
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249 g_api_disp = (api_disp_t *)hdr; \
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250 if (g_api_disp->version != WAAAD_API_DISP_VER) { \
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251 /* Unable to parse this API, do not continue */ \
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252 fprintf(stderr, \
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253 "[%s] Incompatible dispatch API version, please recompile the extension" \
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254 " or update the initialization in extensions.c.\n", \
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255 (name)); \
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256 return EINVAL; \
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257 } \
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258 } \
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259 \
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260 hdr = (sub_api_header_t *) &buffer[index]; \
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261 index += hdr->length; \
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262 \
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263 if ( (flags) & API_MODULE_SECURITY ) { \
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264 g_api_sec = (api_sec_t *)hdr; \
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265 if (g_api_sec->version != WAAAD_API_SEC_VER) { \
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266 /* Unable to parse this API, do not continue */ \
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267 fprintf(stderr, \
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268 "[%s] Incompatible security API version, please recompile the extension" \
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269 " or update the initialization in extensions.c.\n", \
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270 (name)); \
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271 return EINVAL; \
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272 } \
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273 } \
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274 \
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275 hdr = (sub_api_header_t *) &buffer[index]; \
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276 index += hdr->length; \
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277 \
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278 /* next module... */ \
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279 \
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280 }
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281
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282
400
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283 #define EXTENSION_API_INIT(flags, function, name, no_double) \
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284 static int extension_loaded = 0; \
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285 int waaad_ext_init(waaad_api_t * api, char * conffile) { \
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286 EXTENSION_API_INIT_INTERN( flags, name, api ); \
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287 if (extension_loaded && no_double) { \
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288 log_error("Extension %s cannot be loaded twice!\n", name); \
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289 return ENOTSUP; \
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290 } \
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291 extension_loaded++; \
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292 return (function)(conffile); \
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293 }
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294
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295
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296 #endif /* IN_EXTENSION */
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297 #endif /* ! _WAAAD_API_H */
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