include/freeDiameter/extension.h

/*********************************************************************************************************
* Software License Agreement (BSD License)                                                               *
* Author: Sebastien Decugis <sdecugis@freediameter.net>							 *
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* Copyright (c) 2013, WIDE Project and NICT								 *
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#ifndef _EXTENSION_H
#define _EXTENSION_H

#ifdef __cplusplus
extern "C" {
#endif

/* Include definition of freeDiameter API */
#include <freeDiameter/freeDiameter-host.h>
#include <freeDiameter/libfdcore.h>

/* Macro that define the entry point of the extension */
#define EXTENSION_ENTRY(_name, _function, _depends...)					\
const char *fd_ext_depends[] = { _name , ## _depends , NULL };				\
static int extension_loaded = 0;							\
int fd_ext_init(int major, int minor, char * conffile) {				\
	if ((major != FD_PROJECT_VERSION_MAJOR)						\
		|| (minor != FD_PROJECT_VERSION_MINOR)) {				\
		TRACE_ERROR("This extension (" _name ") was compiled for a different version of freeDiameter.");	\
		TRACE_DEBUG(INFO, "daemon %d.%d != ext %d.%d",				\
			major, minor,							\
			FD_PROJECT_VERSION_MAJOR, FD_PROJECT_VERSION_MINOR);		\
		return EINVAL;								\
	}										\
	if (extension_loaded) {								\
		TRACE_ERROR("Extension (" _name ") cannot be loaded twice!");		\
		return ENOTSUP;								\
	}										\
	LOG_N("Loading (" _name ") extension.");					\
	return (_function)(conffile);							\
}						
    
#define EXTENSION_ENTRY2(_name, _dictfunc, _rulesfunction, _depends...)					\
EXTENSION_ENTRY(_name, _dictfunc, ## _depends )					\
int fd_ext_init2(int major, int minor, char * conffile) {				\
    if ((major != FD_PROJECT_VERSION_MAJOR)						\
        || (minor != FD_PROJECT_VERSION_MINOR)) {				\
        TRACE_ERROR("This extension (" _name ") was compiled for a different version of freeDiameter.");	\
        TRACE_DEBUG(INFO, "daemon %d.%d != ext %d.%d",				\
            major, minor,							\
            FD_PROJECT_VERSION_MAJOR, FD_PROJECT_VERSION_MINOR);		\
        return EINVAL;								\
    }										\
    if (extension_loaded) {								\
        TRACE_ERROR("Extension (" _name ") cannot be loaded twice!");		\
        return ENOTSUP;								\
    }										\
    extension_loaded++;								\
    return (_rulesfunction)(conffile);							\
}							\
int fd_ext_parselocalrules(char *conffile) {					\
    return (_rulesfunction)(conffile);					\
}									

#ifdef __cplusplus
}
#endif

#endif /* _EXTENSION_H */

#if 0
static int dict_entry(char * conffile)                                  
{                                       
        int x = (_dictfunc)(conffile);                                  \
        if (x != 0) return x;                                   \
        return (_rulesfunction)(conffile);                                      \
} 
#endif