src/server/config/objconf.c

Mon, 07 Nov 2022 22:30:12 +0100

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Mon, 07 Nov 2022 22:30:12 +0100
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child 425
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permissions
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new obj.conf parser based on serverconfig parser

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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 #include "objconf.h"
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30
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31 #include <string.h>
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32
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33 #include <cx/utils.h>
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34
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35 /* dev notes:
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36 *
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37 * to free ObjectConfig, free:
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38 * line dlist
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39 * mempool
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40 * object
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41 */
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42
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43 ObjectConfig *load_object_config(char *file) {
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44 FILE *in = fopen(file, "r");
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45 if(in == NULL) {
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46 return NULL;
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47 }
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48
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49 ObjectConfig *conf = malloc(sizeof(ObjectConfig));
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50 conf->parser.parse = objconf_parse;
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51 conf->file = file;
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52 //conf->conditions = NULL;
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53 conf->levels = NULL;
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54 conf->objects = cxPointerLinkedListCreate(cxDefaultAllocator, cx_cmp_ptr);
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55 //conf->lines = NULL;
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56
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57 int r = cfg_parse_basic_file((ConfigParser*)conf, in);
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58 if(r != 0) {
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59 // TODO: free
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60 return NULL;
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61 }
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62
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63 fclose(in);
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64
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65 return conf;
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66 }
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67
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68 ObjectConfig2* objectconf_load(const char *file) {
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69 CxMempool *mp = cxBasicMempoolCreate(512);
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70 if(!mp) {
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71 return NULL;
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72 }
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73
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74 // setup parser
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75 ConfigParser2 parser;
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76 memset(&parser, 0, sizeof(ConfigParser2));
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77 parser.mp = mp;
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78 parser.validateDirective = objectconf_validate_directive;
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79 parser.validateObjBegin = objectconf_validate_objbegin;
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80 parser.validateObjEnd = objectconf_validate_objend;
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81 parser.allow_hierarchy = 1;
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82
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83 ConfigNode *obj_config = serverconfig_load_file(&parser, file);
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84 if(!obj_config) {
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85 cxMempoolDestroy(mp);
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86 return NULL;
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87 }
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88
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89 ObjectConfig2 *conf = cxMalloc(mp->allocator, sizeof(ObjectConfig2));
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90 if(!conf) {
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91 cxMempoolDestroy(mp);
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92 return NULL;
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93 }
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94
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95 conf->mp = mp;
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96 conf->root = obj_config;
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97
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98 return conf;
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99 }
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100
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101 void objectconf_free(ObjectConfig2 *objconf) {
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102 cxMempoolDestroy(objconf->mp);
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103 }
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104
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105 int objectconf_validate_directive(ConfigParser2 *parser, ConfigNode *node) {
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106 // It is possible that this function is called for Objects
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107 // if { is on the next line
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108 // It may be possible to fix the parser to not do that, but it is fine
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109 // to just deal with that here
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110
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111 // ignore if node->name is an Object name like
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112 // Object, Client, If, Else IfElse
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113 const char *objnames[] = { "Object", "Client", "If", "ElseIf", "Else" };
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114 size_t typeindex;
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115 if(!serverconfig_validate_directive_name(node, objnames, 5, &typeindex)) {
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116 return 0;
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117 }
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118
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119 // now check directive type
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120 const char *dirtypes[] = { "AuthTrans", "NameTrans", "PathCheck", "ObjectType", "Service", "AddLog", "Error" };
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121 if(serverconfig_validate_directive_name(node, dirtypes, 7, &typeindex)) {
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122 return 1;
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123 }
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124
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125 // directives must have parameter names
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126 ConfigParam *param_err;
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127 if(serverconfig_check_param_names(node, &param_err)) {
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128 return 1;
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129 }
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130
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131 // check if the fn parameter exists
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132 cxstring fn = serverconfig_directive_get_arg(node, cx_str("fn"));
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133 if(fn.length == 0) {
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134 return 1;
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135 }
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136
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137 return 0;
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138 }
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139
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140 static int validate_else_node(ConfigNode *node) {
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141 // previous node must be "If" or "ElseIf"
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142 ConfigNode *prev = serverconfig_previous_dir_or_obj(node);
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143 const char *allowed_prev_types[] = { "If", "ElseIf" };
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144 size_t typeindex;
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145 if(serverconfig_validate_directive_name(prev, allowed_prev_types, 2, &typeindex)) {
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146 return 1; // prevous node (not counting space, comments) is not "If" or "Else"
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147 }
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148
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149 // "Else" must have no args
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150 return node->args ? 1 : 0;
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151 }
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152
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153 static int validate_elseif_node(ConfigNode *node) {
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154 // the previous node must be "If" or "IfElse"
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155 // in case if "IfElse", we also have to check all previous nodes, until
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156 // we find the starting "If" node
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157 const char *allowed_prev_types[] = { "If", "ElseIf" };
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158 size_t typeindex;
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159 ConfigNode *prev = serverconfig_previous_dir_or_obj(node);
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160 while(prev) {
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161 if(serverconfig_validate_directive_name(prev, allowed_prev_types, 2, &typeindex)) {
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162 return 1; // previous node was not "If" or "ElseIf"
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163 }
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164 // we found a valid "If" node, the whole construct is valid
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165 if(typeindex == 0) {
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166 return 0;
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167 }
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168
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169 prev = serverconfig_previous_dir_or_obj(node);
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170 }
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171 // at this point we found only "IfElse" nodes, but no "If" node
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172 return 1;
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173 }
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174
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175 int objectconf_validate_objbegin(ConfigParser2 *parser, ConfigNode *node) {
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176 // get object type
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177 const char *objnames[] = { "Object", "Client", "If", "ElseIf", "Else" };
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178 size_t typeindex;
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179 if(serverconfig_validate_directive_name(node, objnames, 5, &typeindex)) {
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180 return 1; // unknown object type
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181 }
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182
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183 // some special requirements for "Else" node
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184 if(typeindex == 4) {
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185 // type is "Else"
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186 return validate_else_node(node);
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187 }
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188
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189 // check "ElseIf" was used after "If" or "IfElse"
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190 if(typeindex == 3 && validate_elseif_node(node)) {
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191 return 1;
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192 }
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193
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194 // only Object must have a name/value arg, other types can have more
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195 // complex parameters
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196 if(typeindex == 0) {
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197 // type is "Object"
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198 ConfigParam *err;
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199 if(serverconfig_check_param_names(node, &err)) {
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200 return 1;
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201 }
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202 return 0;
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203 }
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204
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205 // all remaining object types must have arguments, but don't check more
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206 return node->args ? 0 : 1;
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207 }
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208
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209 int objectconf_validate_objend(ConfigParser2 *parser, ConfigNode *node) {
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210 return 0;
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211 }
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212
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213
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214 void free_object_config(ObjectConfig *conf) {
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215 // free other lists
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216 if(conf->levels) {
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217 //ucx_list_free(conf->levels);
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218 }
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219
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220 // free mempool
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221 //ucx_mempool_destroy(conf->parser.mp->pool);
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222 free(conf);
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223 }
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224
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225
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226
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227 int objconf_parse(void *p, ConfigLine *begin, ConfigLine *end, cxmutstr line) {
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228 ObjectConfig *conf = p;
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229
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230 begin->type = cfg_get_line_type(line);
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231 switch(begin->type) {
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232 case LINE_BEGIN_TAG: {
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233 ConfigTag *tag = cfg_parse_begin_tag(line, conf->parser.mp);
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234 if(tag == NULL) {
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235 log_ereport(LOG_FAILURE, "Parse error in %s", conf->file);
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236 exit(-1); // TODO: better error handling
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237 }
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238 tag->begin = begin;
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239 tag->end = end;
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240 tag->type_num = cfg_get_tag_type(cx_strcast(tag->name));
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241 //printf("line {%s}\n", cx_strdub(ll).ptr);
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242 if(objconf_on_begin_tag(conf, tag) != 0) {
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243 fprintf(stderr, "1error\n");
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244 exit(-1);
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245 }
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246 break;
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247 }
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248 case LINE_END_TAG: {
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249 cxmutstr tag = cfg_get_end_tag_name(line);
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250 if(objconf_on_end_tag(conf, tag) != 0) {
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251 fprintf(stderr, "2error\n");
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252 exit(-1);
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253 }
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254
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255 break;
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256 }
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257 case LINE_DIRECTIVE: {
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258 ConfigDirective *dir = cfg_parse_directive(
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259 line,
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260 conf->parser.mp);
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261 dir->begin = begin;
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262 dir->end = end;
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263 if(objconf_on_directive(conf, dir) != 0) {
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264 fprintf(stderr, "3error\n");
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265 exit(-1);
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266 }
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267 }
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268 }
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269 return 0;
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270 }
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271
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272 int objconf_on_begin_tag(ObjectConfig *conf, ConfigTag *tag) {
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273 CxAllocator *mp = conf->parser.mp;
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274 if(tag->type_num != TAG_OBJECT) {
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275 ConfigParserLevel *l = conf->levels;
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276 if(l->tag->type_num != TAG_OBJECT) {
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277 tag->parent = l->tag;
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278 }
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279 }
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280
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281
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282 switch(tag->type_num) {
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283 case TAG_OBJECT: {
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284 ConfigObject *obj = OBJ_NEW_N(mp, ConfigObject);
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285 obj->begin = tag->begin;
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286 obj->end = tag->end;
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287
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288 obj->name = cfg_param_get(tag->param, cx_str("name"));
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289 obj->ppath = cfg_param_get(tag->param, cx_str("ppath"));
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290
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291 conf->obj = obj;
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292 //conf->objects = ucx_list_append_a(mp, conf->objects, obj);
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293 cxListAdd(conf->objects, obj);
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294
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295 // create tree level object
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296 ConfigParserLevel *lvl = OBJ_NEW(mp, ConfigParserLevel);
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297 lvl->iftag = NULL;
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298 lvl->levelnum = 1;
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299 lvl->tag = tag;
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300 lvl->next = NULL;
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301 //conf->levels = ucx_list_prepend_a(mp, conf->levels, lvl);
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302 CFG_LEVEL_PREPEND(&conf->levels, lvl);
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303
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304 break;
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305 }
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306 case TAG_IF: {
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307 // create tree level object
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308 ConfigParserLevel *last_lvl = conf->levels;
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309
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310 ConfigParserLevel *lvl = OBJ_NEW(mp, ConfigParserLevel);
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311
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312 lvl->iftag = NULL;
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313 lvl->levelnum = last_lvl->levelnum + 1;
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314 lvl->tag = tag;
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315 //conf->levels = ucx_list_prepend_a(mp, conf->levels, lvl);
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316 CFG_LEVEL_PREPEND(&conf->levels, lvl);
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317 last_lvl->iftag = tag;
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318
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319 break;
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320 }
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321 case TAG_ELSEIF: {
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322 }
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323 case TAG_ELSE: {
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324 // create tree level object
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325 ConfigParserLevel *last_lvl = conf->levels;
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326 tag->iftag = last_lvl->iftag;
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327
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328 ConfigParserLevel *lvl = OBJ_NEW(
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329 conf->parser.mp,
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330 ConfigParserLevel);
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331
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332 lvl->iftag = last_lvl->tag;
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333 lvl->levelnum = last_lvl->levelnum + 1;
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334 lvl->tag = tag;
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335 //conf->levels = ucx_list_prepend(conf->levels, lvl);
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336 CFG_LEVEL_PREPEND(&conf->levels, lvl);
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337
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338 break;
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339 }
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340 case TAG_CLIENT: {
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341 // create tree level object
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342
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343 // TODO
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344
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345 break;
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346 }
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347 default: {
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348 log_ereport(LOG_FAILURE, "objconf: unknown tag");
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349 return 1;
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350 }
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351 }
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352
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353 return 0;
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354 }
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355
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356 int objconf_on_end_tag(ObjectConfig *conf, cxmutstr tagname) {
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357 int type = cfg_get_tag_type(cx_strcast(tagname));
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358 if(type == -1) {
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359 log_ereport(LOG_FAILURE, "objconf: unknown tag");
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360 return 1;
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361 } else {
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362 if(type == TAG_OBJECT) {
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363 conf->obj = NULL;
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364 }
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365
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366 // remove level
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367 /*
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368 conf->levels = ucx_list_remove_a(
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369 conf->parser.mp,
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370 conf->levels,
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371 conf->levels);
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372 */
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373 conf->levels = conf->levels->next;
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374 }
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375
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376 return 0;
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377 }
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378
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379 int objconf_on_directive(ObjectConfig *conf, ConfigDirective *dir) {
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380 ConfigParserLevel *lvl = conf->levels;
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381
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382 // check if we have a condition for the directive
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383 // if the level tag is not an object tag, use it as condition
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384 if(lvl->tag->type_num != TAG_OBJECT) {
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385 dir->condition = lvl->tag;
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386 }
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387
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388 // add directive to current object
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389 /*
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390 conf->obj->directives[dir->type_num] = ucx_list_append_a(
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diff changeset
391 conf->parser.mp,
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392 conf->obj->directives[dir->type_num],
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393 dir);
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394 */
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395
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396 ConfigDirectiveList *dir_entry = cxMalloc(conf->parser.mp, sizeof(ConfigDirectiveList));
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397 dir_entry->directive = dir;
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398 dir_entry->next = NULL;
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399 CFG_DIRECTIVES_ADD(&conf->obj->directives[dir->type_num], dir_entry);
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400
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401 return 0;
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402 }
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parents:
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403

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