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diff --git a/lib/radius/examples/example_3.c b/lib/radius/examples/example_3.c
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+/*
+Copyright (c) 2011, Network RADIUS SARL
+All rights reserved.
+
+Redistribution and use 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 <organization> nor the
+      names of its contributors may be used to endorse or promote products
+      derived from this software without specific prior written permission.
+
+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 <COPYRIGHT HOLDER> 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.
+ */
+
+#include <networkradius-devel/client.h>
+
+/** \file example_3.c
+ *  \brief Sample code to initialize a RADIUS packet and a response to it.
+ *
+ *  This example initializes a packet, and then adds User-Name and
+ *  User-Password to it.  The resulting packet is then printed to the
+ *  standard output.
+ *
+ *  As a next step, it then creates the response, and prints that,
+ *  too.
+ */
+
+static const char *secret = "testing123";
+static uint8_t request_buffer[NR_MAX_PACKET_LEN];
+static uint8_t response_buffer[NR_MAX_PACKET_LEN];
+static RADIUS_PACKET request, response;
+
+int main(int argc, const char *argv[])
+{
+	int rcode;
+	const char *user = "bob";
+	const char *password = "password";
+
+	rcode = nr_packet_init(&request, NULL, secret, PW_ACCESS_REQUEST,
+			       request_buffer, sizeof(request_buffer));
+	if (rcode < 0) {
+	error:
+		fprintf(stderr, "Error :%s\n",  nr_strerror(rcode));
+		return 1;
+	}
+
+	if (argc > 1) user = argv[1];
+	if (argc > 2) password = argv[2];
+
+	rcode = nr_packet_attr_append(&request, NULL,
+				      NR_DA_USER_NAME,
+				      user, 0);
+	if (rcode < 0) goto error;
+	
+	rcode = nr_packet_attr_append(&request, NULL,
+				      NR_DA_USER_PASSWORD,
+				      password, 0);
+	if (rcode < 0) goto error;
+
+	/*
+	 *	ALWAYS call nr_packet_sign() before sending the packet
+	 *	to anyone else!
+	 */
+	rcode = nr_packet_sign(&request, NULL);
+	if (rcode < 0) goto error;
+
+	nr_packet_print_hex(&request);
+
+	rcode = nr_packet_init(&response, &request, secret, PW_ACCESS_ACCEPT,
+			       response_buffer, sizeof(response_buffer));
+	if (rcode < 0) goto error;
+
+	rcode = nr_packet_attr_append(&response, &request,
+				      NR_DA_REPLY_MESSAGE,
+				      "Success!", 0);
+	if (rcode < 0) goto error;
+
+	rcode = nr_packet_attr_append(&response, &request,
+				      NR_DA_TUNNEL_PASSWORD,
+				      password, 0);
+	if (rcode < 0) goto error;
+	rcode = nr_packet_sign(&response, &request);
+	if (rcode < 0) goto error;
+
+	nr_packet_print_hex(&response);
+
+	/*
+	 *	Check that the response is well-formed.  The
+	 *	nr_packet_verify() function also calls nr_packet_ok().
+	 *	However, it is sometimes useful to separate "malformed
+	 *	packet" errors from "packet is not a response to a
+	 *	reqeust" errors.
+	 */
+	rcode = nr_packet_ok(&response);
+	if (rcode < 0) goto error;
+
+	/*
+	 *	Double-check the signature of the response.
+	 */
+	rcode = nr_packet_verify(&response, &request);
+	if (rcode < 0) goto error;
+
+	rcode = nr_packet_decode(&response, &request);
+	if (rcode < 0) goto error;
+
+	nr_vp_fprintf_list(stdout, response.vps);
+	nr_vp_free(&response.vps);
+
+	return 0;
+}