diff -r e2093ca0ef90 -r 90805bb9fbd6 src/server/config/serverconfig.h
--- a/src/server/config/serverconfig.h	Sun Nov 06 16:59:39 2022 +0100
+++ b/src/server/config/serverconfig.h	Sun Nov 06 17:41:39 2022 +0100
@@ -34,6 +34,8 @@
 #include <cx/mempool.h>
 #include <cx/string.h>
 
+#include <stdbool.h>
+
 #include "conf.h"
 
 #ifdef __cplusplus
@@ -46,6 +48,7 @@
 typedef struct ServerConfig    ServerConfig;
 typedef struct ConfigNode      ConfigNode;
 typedef struct CFGToken        CFGToken;
+typedef struct ConfigParser2   ConfigParser2; // TODO: rename to ConfigParser after old ConfigParser is removed
 
 typedef enum ConfigNodeType    ConfigNodeType;
 typedef enum CFGTokenType      CFGTokenType;
@@ -98,9 +101,50 @@
     CFGTokenType type;
 };
 
+enum ConfigParserError {
+    CONFIG_PARSER_OOM = 0,
+    CONFIG_PARSER_SYNTAX_ERROR
+};
+
+/*
+ * CfgValidateNodeFunc functions are called by the parser to validate
+ * objects and directives.
+ * 
+ * The function must return 0 if the validation was successful. If the
+ * functions returns a value != 0, the parser aborts.
+ */
+typedef int(*CfgValidateNodeFunc)(ConfigParser2 *parser, ConfigNode *node);
+
+struct ConfigParser2 {
+    CxMempool *mp;
+    
+    int error;
+    
+    /*
+     * called when an object is started
+     */
+    CfgValidateNodeFunc validateObjBegin;
+    
+    /*
+     * called when an object is closed
+     */
+    CfgValidateNodeFunc validateObjEnd;
+    
+    /*
+     * called before a directive is added
+     */
+    CfgValidateNodeFunc validateDirective;
+    
+    /*
+     * true: store result in a tree
+     * false: flat list of directives, don't allow '{' and  '}'
+     */
+    bool allow_hierarchy;
+};
+
 ServerConfig* serverconfig_load(const char *file);
 
-ServerConfig* serverconfig_parse(cxstring content);
+ServerConfig* serverconfig_parse(ConfigParser2 *parser, cxstring content);
 
 void serverconfig_free(ServerConfig *cfg);