diff --git a/extensions/app_radgw/rgwx_sample.c b/extensions/app_radgw/rgwx_sample.c
new file mode 100644
index 0000000..4e2cd03
--- /dev/null
+++ b/extensions/app_radgw/rgwx_sample.c
@@ -0,0 +1,97 @@
+/*********************************************************************************************************
+* Software License Agreement (BSD License)                                                               *
+* Author: Sebastien Decugis <sdecugis@freediameter.net>							 *
+*													 *
+* Copyright (c) 2013, 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.								 *
+*********************************************************************************************************/
+
+/* Sample radius/diameter gateway plugin, for developers to see the structure of a plugin. */
+
+#include "rgw_common.h"
+
+/* The state of this extension */
+struct rgwp_config {
+	/* In a real extension, we would store the parsed configuration file, and the states of the extension */
+	int init;
+	
+	/* If needed to store information between sent Diameter request and received answer, the session is probably the best place.
+	  See rgwx_echodrop for an example. */
+};
+
+/* The function called at plugin initialization */
+static int sample_conf_parse ( char * conf_file, struct rgwp_config ** state )
+{
+	TRACE_ENTRY("%p %p", conf_file, state);
+	CHECK_PARAMS(state);
+	
+	CHECK_MALLOC( *state = malloc(sizeof(struct rgwp_config)) );
+	
+	(*state)->init = 1;
+	
+	return 0;
+}
+
+/* This function is called when the plugin is unloaded, to cleanup all the states */
+static void sample_conf_free(struct rgwp_config * state)
+{
+	TRACE_ENTRY("%p", state);
+	CHECK_PARAMS_DO( state, );
+	free(state);
+	return;
+}
+
+/* This function is called on incoming RADIUS messages. It should handle (some) RADIUS data and store into the Diameter message. */
+static int sample_rad_req( struct rgwp_config * cs, struct radius_msg * rad_req, struct radius_msg ** rad_ans, struct msg ** diam_fw, struct rgw_client * cli )
+{
+	TRACE_ENTRY("%p %p %p %p %p", cs, rad_req, rad_ans, diam_fw, cli);
+	CHECK_PARAMS(cs);
+	TRACE_DEBUG(INFO, "RADIUS/Diameter Sample plugin received a new RADIUS message.");
+	return 0;
+}
+
+/* This function is called when a Diameter answer is coming back. It should remove the AVPs and add the attributes in the RADIUS message. */
+static int sample_diam_ans( struct rgwp_config * cs, struct msg ** diam_ans, struct radius_msg ** rad_fw, struct rgw_client * cli )
+{
+	TRACE_ENTRY("%p %p %p %p", cs, diam_ans, rad_fw, cli);
+	CHECK_PARAMS(cs);
+	TRACE_DEBUG(INFO, "RADIUS/Diameter Sample plugin received a new Diameter answer.");
+	return 0;
+}
+
+
+/* Finally, we declare the structure that will be loaded by main RADIUS/Diameter gateway extension */
+struct rgw_api rgwp_descriptor = {
+	.rgwp_name       = "sample",
+	.rgwp_conf_parse = sample_conf_parse,
+	.rgwp_conf_free  = sample_conf_free,
+	.rgwp_rad_req    = sample_rad_req,
+	.rgwp_diam_ans   = sample_diam_ans
+};