diff --git a/extensions/test_app/ta_cli.c b/extensions/test_app/ta_cli.c
new file mode 100644
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+++ b/extensions/test_app/ta_cli.c
@@ -0,0 +1,293 @@
+/*********************************************************************************************************
+* Software License Agreement (BSD License)                                                               *
+* Author: Sebastien Decugis <sdecugis@freediameter.net>							 *
+*													 *
+* Copyright (c) 2015, 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.								 *
+*********************************************************************************************************/
+
+/* Create and send a message, and receive it */
+
+/* Note that we use both sessions and the argument to answer callback to pass the same value.
+ * This is just for the purpose of checking everything went OK.
+ */
+
+#include "test_app.h"
+
+#include <stdio.h>
+
+static struct session_handler * ta_cli_reg = NULL;
+
+struct sess_state {
+	int32_t		randval;	/* a random value to store in Test-AVP */
+	struct timespec ts;		/* Time of sending the message */
+} ;
+
+/* Cb called when an answer is received */
+static void ta_cb_ans(void * data, struct msg ** msg)
+{
+	struct sess_state * mi = NULL;
+	struct timespec ts;
+	struct session * sess;
+	struct avp * avp;
+	struct avp_hdr * hdr;
+	unsigned long dur;
+	int error = 0;
+	
+	CHECK_SYS_DO( clock_gettime(CLOCK_REALTIME, &ts), return );
+
+	/* Search the session, retrieve its data */
+	{
+		int new;
+		CHECK_FCT_DO( fd_msg_sess_get(fd_g_config->cnf_dict, *msg, &sess, &new), return );
+		ASSERT( new == 0 );
+		
+		CHECK_FCT_DO( fd_sess_state_retrieve( ta_cli_reg, sess, &mi ), return );
+		ASSERT( (void *)mi == data );
+	}
+	
+	/* Now log content of the answer */
+	fprintf(stderr, "RECV ");
+	
+	/* Value of Test-AVP */
+	CHECK_FCT_DO( fd_msg_search_avp ( *msg, ta_avp, &avp), return );
+	if (avp) {
+		CHECK_FCT_DO( fd_msg_avp_hdr( avp, &hdr ), return );
+		if (hdr->avp_value->i32 == mi->randval) {
+			fprintf(stderr, "%x (%s) ", hdr->avp_value->i32, "Ok");
+		} else {
+			fprintf(stderr, "%x (%s) ", hdr->avp_value->i32, "PROBLEM");
+			error++;
+		}
+	} else {
+		fprintf(stderr, "no_Test-AVP ");
+		error++;
+	}
+	
+	/* Value of Result Code */
+	CHECK_FCT_DO( fd_msg_search_avp ( *msg, ta_res_code, &avp), return );
+	if (avp) {
+		CHECK_FCT_DO( fd_msg_avp_hdr( avp, &hdr ), return );
+		fprintf(stderr, "Status: %d ", hdr->avp_value->i32);
+		if (hdr->avp_value->i32 != 2001)
+			error++;
+	} else {
+		fprintf(stderr, "no_Result-Code ");
+		error++;
+	}
+	
+	/* Value of Origin-Host */
+	CHECK_FCT_DO( fd_msg_search_avp ( *msg, ta_origin_host, &avp), return );
+	if (avp) {
+		CHECK_FCT_DO( fd_msg_avp_hdr( avp, &hdr ), return );
+		fprintf(stderr, "From '%.*s' ", (int)hdr->avp_value->os.len, hdr->avp_value->os.data);
+	} else {
+		fprintf(stderr, "no_Origin-Host ");
+		error++;
+	}
+	
+	/* Value of Origin-Realm */
+	CHECK_FCT_DO( fd_msg_search_avp ( *msg, ta_origin_realm, &avp), return );
+	if (avp) {
+		CHECK_FCT_DO( fd_msg_avp_hdr( avp, &hdr ), return );
+		fprintf(stderr, "('%.*s') ", (int)hdr->avp_value->os.len, hdr->avp_value->os.data);
+	} else {
+		fprintf(stderr, "no_Origin-Realm ");
+		error++;
+	}
+	
+	CHECK_POSIX_DO( pthread_mutex_lock(&ta_conf->stats_lock), );
+	dur = ((ts.tv_sec - mi->ts.tv_sec) * 1000000) + ((ts.tv_nsec - mi->ts.tv_nsec) / 1000);
+	if (ta_conf->stats.nb_recv) {
+		/* Ponderate in the avg */
+		ta_conf->stats.avg = (ta_conf->stats.avg * ta_conf->stats.nb_recv + dur) / (ta_conf->stats.nb_recv + 1);
+		/* Min, max */
+		if (dur < ta_conf->stats.shortest)
+			ta_conf->stats.shortest = dur;
+		if (dur > ta_conf->stats.longest)
+			ta_conf->stats.longest = dur;
+	} else {
+		ta_conf->stats.shortest = dur;
+		ta_conf->stats.longest = dur;
+		ta_conf->stats.avg = dur;
+	}
+	
+	if (error)
+		ta_conf->stats.nb_errs++;
+	else 
+		ta_conf->stats.nb_recv++;
+	
+	
+	CHECK_POSIX_DO( pthread_mutex_unlock(&ta_conf->stats_lock), );
+	
+	/* Display how long it took */
+	if (ts.tv_nsec > mi->ts.tv_nsec) {
+		fprintf(stderr, "in %d.%06ld sec", 
+				(int)(ts.tv_sec - mi->ts.tv_sec),
+				(long)(ts.tv_nsec - mi->ts.tv_nsec) / 1000);
+	} else {
+		fprintf(stderr, "in %d.%06ld sec", 
+				(int)(ts.tv_sec + 1 - mi->ts.tv_sec),
+				(long)(1000000000 + ts.tv_nsec - mi->ts.tv_nsec) / 1000);
+	}
+	fprintf(stderr, "\n");
+	fflush(stderr);
+	
+	/* Free the message */
+	CHECK_FCT_DO(fd_msg_free(*msg), return);
+	*msg = NULL;
+	
+	free(mi);
+	
+	return;
+}
+
+/* Create a test message */
+static void ta_cli_test_message()
+{
+	struct msg * req = NULL;
+	struct avp * avp;
+	union avp_value val;
+	struct sess_state * mi = NULL, *svg;
+	struct session *sess = NULL;
+	
+	TRACE_DEBUG(FULL, "Creating a new message for sending.");
+	
+	/* Create the request */
+	CHECK_FCT_DO( fd_msg_new( ta_cmd_r, MSGFL_ALLOC_ETEID, &req ), goto out );
+	
+	/* Create a new session */
+	#define TEST_APP_SID_OPT  "app_test"
+	CHECK_FCT_DO( fd_msg_new_session( req, (os0_t)TEST_APP_SID_OPT, CONSTSTRLEN(TEST_APP_SID_OPT) ), goto out );
+	CHECK_FCT_DO( fd_msg_sess_get(fd_g_config->cnf_dict, req, &sess, NULL), goto out );
+	
+	/* Create the random value to store with the session */
+	mi = malloc(sizeof(struct sess_state));
+	if (mi == NULL) {
+		fd_log_debug("malloc failed: %s", strerror(errno));
+		goto out;
+	}
+	
+	mi->randval = (int32_t)random();
+	
+	/* Now set all AVPs values */
+	
+	/* Set the Destination-Realm AVP */
+	{
+		CHECK_FCT_DO( fd_msg_avp_new ( ta_dest_realm, 0, &avp ), goto out  );
+		val.os.data = (unsigned char *)(ta_conf->dest_realm);
+		val.os.len  = strlen(ta_conf->dest_realm);
+		CHECK_FCT_DO( fd_msg_avp_setvalue( avp, &val ), goto out  );
+		CHECK_FCT_DO( fd_msg_avp_add( req, MSG_BRW_LAST_CHILD, avp ), goto out  );
+	}
+	
+	/* Set the Destination-Host AVP if needed*/
+	if (ta_conf->dest_host) {
+		CHECK_FCT_DO( fd_msg_avp_new ( ta_dest_host, 0, &avp ), goto out  );
+		val.os.data = (unsigned char *)(ta_conf->dest_host);
+		val.os.len  = strlen(ta_conf->dest_host);
+		CHECK_FCT_DO( fd_msg_avp_setvalue( avp, &val ), goto out  );
+		CHECK_FCT_DO( fd_msg_avp_add( req, MSG_BRW_LAST_CHILD, avp ), goto out  );
+	}
+	
+	/* Set Origin-Host & Origin-Realm */
+	CHECK_FCT_DO( fd_msg_add_origin ( req, 0 ), goto out  );
+	
+	/* Set the User-Name AVP if needed*/
+	if (ta_conf->user_name) {
+		CHECK_FCT_DO( fd_msg_avp_new ( ta_user_name, 0, &avp ), goto out  );
+		val.os.data = (unsigned char *)(ta_conf->user_name);
+		val.os.len  = strlen(ta_conf->user_name);
+		CHECK_FCT_DO( fd_msg_avp_setvalue( avp, &val ), goto out  );
+		CHECK_FCT_DO( fd_msg_avp_add( req, MSG_BRW_LAST_CHILD, avp ), goto out  );
+	}
+	
+	/* Set the Test-AVP AVP */
+	{
+		CHECK_FCT_DO( fd_msg_avp_new ( ta_avp, 0, &avp ), goto out  );
+		val.i32 = mi->randval;
+		CHECK_FCT_DO( fd_msg_avp_setvalue( avp, &val ), goto out  );
+		CHECK_FCT_DO( fd_msg_avp_add( req, MSG_BRW_LAST_CHILD, avp ), goto out  );
+	}
+	
+	/* Set the Test-Payload-AVP AVP */
+	if (ta_conf->long_avp_id) {
+		int l;
+		CHECK_FCT_DO( fd_msg_avp_new ( ta_avp_long, 0, &avp ), goto out  );
+		CHECK_MALLOC_DO( val.os.data = malloc(ta_conf->long_avp_len), goto out);
+		val.os.len = ta_conf->long_avp_len;
+		for (l=0; l < ta_conf->long_avp_len; l++)
+			val.os.data[l]=l;
+		CHECK_FCT_DO( fd_msg_avp_setvalue( avp, &val ), goto out  );
+		free(val.os.data);
+		CHECK_FCT_DO( fd_msg_avp_add( req, MSG_BRW_LAST_CHILD, avp ), goto out  );
+	}
+	
+	CHECK_SYS_DO( clock_gettime(CLOCK_REALTIME, &mi->ts), goto out );
+	
+	/* Keep a pointer to the session data for debug purpose, in real life we would not need it */
+	svg = mi;
+	
+	/* Store this value in the session */
+	CHECK_FCT_DO( fd_sess_state_store ( ta_cli_reg, sess, &mi ), goto out ); 
+	
+	/* Log sending the message */
+	fprintf(stderr, "SEND %x to '%s' (%s)\n", svg->randval, ta_conf->dest_realm, ta_conf->dest_host?:"-" );
+	fflush(stderr);
+	
+	/* Send the request */
+	CHECK_FCT_DO( fd_msg_send( &req, ta_cb_ans, svg ), goto out );
+
+	/* Increment the counter */
+	CHECK_POSIX_DO( pthread_mutex_lock(&ta_conf->stats_lock), );
+	ta_conf->stats.nb_sent++;
+	CHECK_POSIX_DO( pthread_mutex_unlock(&ta_conf->stats_lock), );
+
+out:
+	return;
+}
+
+int ta_cli_init(void)
+{
+	CHECK_FCT( fd_sess_handler_create(&ta_cli_reg, (void *)free, NULL, NULL) );
+	
+	CHECK_FCT( fd_event_trig_regcb(ta_conf->signal, "test_app.cli", ta_cli_test_message ) );
+	
+	return 0;
+}
+
+void ta_cli_fini(void)
+{
+	// CHECK_FCT_DO( fd_sig_unregister(ta_conf->signal), /* continue */ );
+	
+	CHECK_FCT_DO( fd_sess_handler_destroy(&ta_cli_reg, NULL), /* continue */ );
+	
+	return;
+};