--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/include/freeDiameter/extension.h	Fri Sep 18 18:54:07 2009 +0900
@@ -0,0 +1,63 @@
+/*********************************************************************************************************
+* Software License Agreement (BSD License)                                                               *
+* Author: Sebastien Decugis <sdecugis@nict.go.jp>							 *
+*													 *
+* Copyright (c) 2009, WIDE Project and NICT								 *
+* All rights reserved.											 *
+* 													 *
+* Redistribution and use of this software in source and binary forms, with or without modification, are  *
+* permitted provided that the following conditions are met:						 *
+* 													 *
+* * Redistributions of source code must retain the above 						 *
+*   copyright notice, this list of conditions and the 							 *
+*   following disclaimer.										 *
+*    													 *
+* * Redistributions in binary form must reproduce the above 						 *
+*   copyright notice, this list of conditions and the 							 *
+*   following disclaimer in the documentation and/or other						 *
+*   materials provided with the distribution.								 *
+* 													 *
+* * Neither the name of the WIDE Project or NICT nor the 						 *
+*   names of its contributors may be used to endorse or 						 *
+*   promote products derived from this software without 						 *
+*   specific prior written permission of WIDE Project and 						 *
+*   NICT.												 *
+* 													 *
+* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED *
+* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A *
+* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR *
+* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 	 *
+* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 	 *
+* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR *
+* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF   *
+* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.								 *
+*********************************************************************************************************/
+
+#ifndef _EXTENSION_H
+#define _EXTENSION_H
+
+/* Include definition of freeDiameter API */
+#include <freeDiameter/freeDiameter-host.h>
+#include <freeDiameter/freeDiameter.h>
+
+/* Macro that define the entry point of the extension */
+#define EXTENSION_ENTRY(_name, _function)						\
+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)) {				\
+		fprintf(stderr, "This extension (" _name ") was compiled for a different version of freeDiameter.\n");	\
+		TRACE_DEBUG(INFO, "daemon %d.%d != ext %d.%d",				\
+			major, minor,							\
+			FD_PROJECT_VERSION_MAJOR, FD_PROJECT_VERSION_MINOR);		\
+		return EINVAL;								\
+	}										\
+	if (extension_loaded) {								\
+		fprintf(stderr, "Extension (" _name ") cannot be loaded twice!\n");	\
+		return ENOTSUP;								\
+	}										\
+	extension_loaded++;								\
+	return (_function)(conffile);							\
+}														
+
+#endif /* _EXTENSION_H */