src/server/config/objconf.c

Sun, 13 Nov 2022 10:57:38 +0100

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Sun, 13 Nov 2022 10:57:38 +0100
changeset 432
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parent 425
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child 453
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permissions
-rw-r--r--

add http_send_response function that is usable for non-blocking IO

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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.delim = "()/*%";
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79 parser.validateDirective = objectconf_validate_directive;
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80 parser.validateObjBegin = objectconf_validate_objbegin;
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81 parser.validateObjEnd = objectconf_validate_objend;
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82 parser.allow_hierarchy = 1;
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83
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84 ConfigNode *obj_config = serverconfig_load_file(&parser, file);
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85 if(!obj_config) {
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86 cxMempoolDestroy(mp);
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87 return NULL;
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88 }
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89
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90 ObjectConfig2 *conf = cxMalloc(mp->allocator, sizeof(ObjectConfig2));
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91 if(!conf) {
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92 cxMempoolDestroy(mp);
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93 return NULL;
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94 }
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95
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96 conf->mp = mp;
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97 conf->root = obj_config;
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98
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99 return conf;
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100 }
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101
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102 void objectconf_free(ObjectConfig2 *objconf) {
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103 cxMempoolDestroy(objconf->mp);
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104 }
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105
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106 int objectconf_validate_directive(ConfigParser2 *parser, ConfigNode *node) {
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107 // It is possible that this function is called for Objects
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108 // if { is on the next line
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109 // It may be possible to fix the parser to not do that, but it is fine
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110 // to just deal with that here
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111
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112 // ignore if node->name is an Object name like
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113 // Object, Client, If, Else IfElse
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114 const char *objnames[] = { "Object", "Client", "If", "ElseIf", "Else" };
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115 size_t typeindex;
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116 if(!serverconfig_validate_directive_name(node, objnames, 5, &typeindex)) {
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117 return 0;
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118 }
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119
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120 // now check directive type
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121 const char *dirtypes[] = { "AuthTrans", "NameTrans", "PathCheck", "ObjectType", "Service", "AddLog", "Error" };
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122 if(serverconfig_validate_directive_name(node, dirtypes, 7, &typeindex)) {
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123 return 1;
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124 }
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125
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126 // directives must have parameter names
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127 ConfigParam *param_err;
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128 if(serverconfig_check_param_names(node, &param_err)) {
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129 return 1;
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130 }
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131
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132 // check if the fn parameter exists
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133 cxstring fn = serverconfig_directive_get_arg(node, cx_str("fn"));
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134 if(fn.length == 0) {
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135 return 1;
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136 }
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137
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138 return 0;
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139 }
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140
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141 static int validate_else_node(ConfigNode *node) {
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142 // previous node must be "If" or "ElseIf"
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143 ConfigNode *prev = serverconfig_previous_dir_or_obj(node);
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144 const char *allowed_prev_types[] = { "If", "ElseIf" };
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145 size_t typeindex;
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146 if(serverconfig_validate_directive_name(prev, allowed_prev_types, 2, &typeindex)) {
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147 return 1; // prevous node (not counting space, comments) is not "If" or "Else"
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148 }
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149
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150 // "Else" must have no args
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151 return node->args ? 1 : 0;
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152 }
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153
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154 static int validate_elseif_node(ConfigNode *node) {
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155 // the previous node must be "If" or "IfElse"
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156 // in case if "IfElse", we also have to check all previous nodes, until
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157 // we find the starting "If" node
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158 const char *allowed_prev_types[] = { "If", "ElseIf" };
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159 size_t typeindex;
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160 ConfigNode *prev = serverconfig_previous_dir_or_obj(node);
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161 while(prev) {
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162 if(serverconfig_validate_directive_name(prev, allowed_prev_types, 2, &typeindex)) {
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163 return 1; // previous node was not "If" or "ElseIf"
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164 }
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165 // we found a valid "If" node, the whole construct is valid
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166 if(typeindex == 0) {
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167 return 0;
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168 }
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169
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170 prev = serverconfig_previous_dir_or_obj(node);
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171 }
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172 // at this point we found only "IfElse" nodes, but no "If" node
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173 return 1;
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174 }
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175
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176 int objectconf_validate_objbegin(ConfigParser2 *parser, ConfigNode *node) {
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177 // get object type
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178 const char *objnames[] = { "Object", "Client", "If", "ElseIf", "Else" };
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179 size_t typeindex;
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180 if(serverconfig_validate_directive_name(node, objnames, 5, &typeindex)) {
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181 return 1; // unknown object type
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182 }
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183
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184 // some special requirements for "Else" node
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185 if(typeindex == 4) {
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186 // type is "Else"
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187 return validate_else_node(node);
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188 }
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189
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190 // check "ElseIf" was used after "If" or "IfElse"
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191 if(typeindex == 3 && validate_elseif_node(node)) {
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192 return 1;
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193 }
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194
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195 // only Object must have a name/value arg, other types can have more
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196 // complex parameters
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197 if(typeindex == 0) {
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198 // type is "Object"
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199 ConfigParam *err;
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200 if(serverconfig_check_param_names(node, &err)) {
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201 return 1;
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202 }
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203 return 0;
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204 }
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205
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206 // all remaining object types must have arguments, but don't check more
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207 return node->args ? 0 : 1;
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208 }
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209
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210 int objectconf_validate_objend(ConfigParser2 *parser, ConfigNode *node) {
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211 return 0;
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212 }
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213
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214
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215 void free_object_config(ObjectConfig *conf) {
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216 // free other lists
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217 if(conf->levels) {
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218 //ucx_list_free(conf->levels);
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219 }
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220
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221 // free mempool
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222 //ucx_mempool_destroy(conf->parser.mp->pool);
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223 free(conf);
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224 }
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225
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226
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227
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228 int objconf_parse(void *p, ConfigLine *begin, ConfigLine *end, cxmutstr line) {
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229 ObjectConfig *conf = p;
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230
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231 begin->type = cfg_get_line_type(line);
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232 switch(begin->type) {
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233 case LINE_BEGIN_TAG: {
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234 ConfigTag *tag = cfg_parse_begin_tag(line, conf->parser.mp);
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235 if(tag == NULL) {
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236 log_ereport(LOG_FAILURE, "Parse error in %s", conf->file);
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237 exit(-1); // TODO: better error handling
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238 }
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239 tag->begin = begin;
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240 tag->end = end;
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241 tag->type_num = cfg_get_tag_type(cx_strcast(tag->name));
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242 //printf("line {%s}\n", cx_strdub(ll).ptr);
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243 if(objconf_on_begin_tag(conf, tag) != 0) {
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244 fprintf(stderr, "1error\n");
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245 exit(-1);
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246 }
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247 break;
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248 }
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249 case LINE_END_TAG: {
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250 cxmutstr tag = cfg_get_end_tag_name(line);
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251 if(objconf_on_end_tag(conf, tag) != 0) {
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252 fprintf(stderr, "2error\n");
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253 exit(-1);
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254 }
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255
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256 break;
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257 }
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258 case LINE_DIRECTIVE: {
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259 ConfigDirective *dir = cfg_parse_directive(
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260 line,
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261 conf->parser.mp);
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262 dir->begin = begin;
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263 dir->end = end;
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264 if(objconf_on_directive(conf, dir) != 0) {
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265 fprintf(stderr, "3error\n");
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266 exit(-1);
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267 }
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268 }
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269 }
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270 return 0;
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271 }
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272
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273 int objconf_on_begin_tag(ObjectConfig *conf, ConfigTag *tag) {
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274 CxAllocator *mp = conf->parser.mp;
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275 if(tag->type_num != TAG_OBJECT) {
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276 ConfigParserLevel *l = conf->levels;
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277 if(l->tag->type_num != TAG_OBJECT) {
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278 tag->parent = l->tag;
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279 }
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280 }
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281
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282
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283 switch(tag->type_num) {
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284 case TAG_OBJECT: {
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285 ConfigObject *obj = OBJ_NEW_N(mp, ConfigObject);
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286 obj->begin = tag->begin;
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287 obj->end = tag->end;
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288
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289 obj->name = cfg_param_get(tag->param, cx_str("name"));
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290 obj->ppath = cfg_param_get(tag->param, cx_str("ppath"));
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291
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292 conf->obj = obj;
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293 //conf->objects = ucx_list_append_a(mp, conf->objects, obj);
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294 cxListAdd(conf->objects, obj);
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295
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296 // create tree level object
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297 ConfigParserLevel *lvl = OBJ_NEW(mp, ConfigParserLevel);
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298 lvl->iftag = NULL;
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299 lvl->levelnum = 1;
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300 lvl->tag = tag;
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301 lvl->next = NULL;
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302 //conf->levels = ucx_list_prepend_a(mp, conf->levels, lvl);
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303 CFG_LEVEL_PREPEND(&conf->levels, lvl);
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304
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305 break;
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306 }
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307 case TAG_IF: {
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308 // create tree level object
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309 ConfigParserLevel *last_lvl = conf->levels;
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310
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311 ConfigParserLevel *lvl = OBJ_NEW(mp, ConfigParserLevel);
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312
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313 lvl->iftag = NULL;
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314 lvl->levelnum = last_lvl->levelnum + 1;
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315 lvl->tag = tag;
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316 //conf->levels = ucx_list_prepend_a(mp, conf->levels, lvl);
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317 CFG_LEVEL_PREPEND(&conf->levels, lvl);
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318 last_lvl->iftag = tag;
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319
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320 break;
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321 }
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322 case TAG_ELSEIF: {
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323 }
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324 case TAG_ELSE: {
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325 // create tree level object
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326 ConfigParserLevel *last_lvl = conf->levels;
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327 tag->iftag = last_lvl->iftag;
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328
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329 ConfigParserLevel *lvl = OBJ_NEW(
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330 conf->parser.mp,
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331 ConfigParserLevel);
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332
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333 lvl->iftag = last_lvl->tag;
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334 lvl->levelnum = last_lvl->levelnum + 1;
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335 lvl->tag = tag;
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336 //conf->levels = ucx_list_prepend(conf->levels, lvl);
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337 CFG_LEVEL_PREPEND(&conf->levels, lvl);
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338
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339 break;
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340 }
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341 case TAG_CLIENT: {
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342 // create tree level object
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343
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344 // TODO
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345
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346 break;
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347 }
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348 default: {
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349 log_ereport(LOG_FAILURE, "objconf: unknown tag");
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350 return 1;
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351 }
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352 }
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353
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354 return 0;
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355 }
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356
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357 int objconf_on_end_tag(ObjectConfig *conf, cxmutstr tagname) {
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358 int type = cfg_get_tag_type(cx_strcast(tagname));
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359 if(type == -1) {
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360 log_ereport(LOG_FAILURE, "objconf: unknown tag");
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361 return 1;
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362 } else {
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363 if(type == TAG_OBJECT) {
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364 conf->obj = NULL;
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365 }
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366
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367 // remove level
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368 /*
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369 conf->levels = ucx_list_remove_a(
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370 conf->parser.mp,
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371 conf->levels,
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372 conf->levels);
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373 */
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374 conf->levels = conf->levels->next;
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375 }
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376
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377 return 0;
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378 }
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379
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380 int objconf_on_directive(ObjectConfig *conf, ConfigDirective *dir) {
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381 ConfigParserLevel *lvl = conf->levels;
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382
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383 // check if we have a condition for the directive
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384 // if the level tag is not an object tag, use it as condition
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385 if(lvl->tag->type_num != TAG_OBJECT) {
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386 dir->condition = lvl->tag;
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387 }
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388
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389 // add directive to current object
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390 /*
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391 conf->obj->directives[dir->type_num] = ucx_list_append_a(
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392 conf->parser.mp,
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393 conf->obj->directives[dir->type_num],
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394 dir);
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395 */
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396
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397 ConfigDirectiveList *dir_entry = cxMalloc(conf->parser.mp, sizeof(ConfigDirectiveList));
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398 dir_entry->directive = dir;
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399 dir_entry->next = NULL;
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400 CFG_DIRECTIVES_ADD(&conf->obj->directives[dir->type_num], dir_entry);
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401
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402 return 0;
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403 }
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404

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