Index: extensions/test_as/CMakeLists.txt
===================================================================
--- extensions/test_as/CMakeLists.txt	(revision 1347)
+++ extensions/test_as/CMakeLists.txt	(revision 1347)
@@ -0,0 +1,13 @@
+# The test_as extension
+PROJECT("Abort Session dummy server" C)
+
+FD_ADD_EXTENSION(test_as test_as.c)
+
+
+####
+## INSTALL section ##
+
+INSTALL(TARGETS test_as
+	LIBRARY DESTINATION ${INSTALL_EXTENSIONS_SUFFIX}
+	COMPONENT freeDiameter-debug-tools)
+
Index: extensions/test_as/test_as.c
===================================================================
--- extensions/test_as/test_as.c	(revision 1347)
+++ extensions/test_as/test_as.c	(revision 1347)
@@ -0,0 +1,101 @@
+/**********************************************************************************************************
+ * Software License Agreement(BSD License)                                                                *
+ * Author: Thomas Klausner <tk@giga.or.at>                                                                *
+ *                                                                                                        *
+ * Copyright(c) 2019, Thomas Klausner                                                                     *
+ * All rights reserved.                                                                                   *
+ *                                                                                                        *
+ * Written under contract by Effortel Technologies SA, http://effortel.com/                               *
+ *                                                                                                        *
+ * 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.                                                            *
+ *                                                                                                        *
+ * 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.                                                             *
+ **********************************************************************************************************/
+
+/* This extension simply receives ASR and sends ASA after displaying the content, but does not store any data */
+
+#include <freeDiameter/extension.h>
+
+struct disp_hdl *asr_handler_hdl;
+
+static int asr_handler(struct msg ** msg, struct avp * avp, struct session * sess, void * data, enum disp_action * act)
+{
+	struct msg_hdr *hdr = NULL;
+
+	TRACE_ENTRY("%p %p %p %p", msg, avp, sess, act);
+
+	if(msg == NULL)
+		return EINVAL;
+
+	CHECK_FCT(fd_msg_hdr(*msg, &hdr));
+	if(hdr->msg_flags & CMD_FLAG_REQUEST) {
+		/* Request received, answer it */
+		struct msg *answer;
+		os0_t s;
+		size_t sl;
+
+		/* Create the answer message */
+		CHECK_FCT(fd_msg_new_answer_from_req(fd_g_config->cnf_dict, msg, 0));
+		answer = *msg;
+
+		/* TODO copy/fill in AVPs into the answer */
+		/* TODO make result code configurable, depending on an AVP value? */
+		CHECK_FCT(fd_msg_rescode_set(answer, "DIAMETER_SUCCESS", NULL, NULL, 1));
+
+		fd_log_notice("--------------Received the following Abort Session Request:--------------");
+
+		CHECK_FCT(fd_sess_getsid(sess, &s, &sl));
+		fd_log_notice("Session: %.*s",(int)sl, s);
+
+		fd_log_notice("----------------------------------------------------------------------");
+
+		/* Send the answer */
+		CHECK_FCT(fd_msg_send(msg, NULL, NULL));
+
+	} else {
+		/* We received an answer message, just discard it */
+		CHECK_FCT(fd_msg_free(*msg));
+		*msg = NULL;
+	}
+
+	return 0;
+}
+
+/* entry hook: register callback */
+static int as_entry(char * conffile)
+{
+	struct disp_when data;
+
+	TRACE_ENTRY("%p", conffile);
+
+	memset(&data, 0, sizeof(data));
+
+        /* Advertise the support for the Diameter Abort Session application in the peer */
+        CHECK_FCT( fd_dict_search( fd_g_config->cnf_dict, DICT_APPLICATION, APPLICATION_BY_NAME, "Diameter Credit Control Application", &data.app, ENOENT) );
+        CHECK_FCT( fd_disp_app_support ( data.app, NULL, 1, 0 ) );
+
+        /* register handler for ASR */
+        CHECK_FCT( fd_dict_search( fd_g_config->cnf_dict, DICT_COMMAND, CMD_BY_NAME, "Abort-Session-Request", &data.command, ENOENT) );
+        CHECK_FCT( fd_disp_register( asr_handler, DISP_HOW_CC, &data, NULL, &asr_handler_hdl ) );
+
+	return 0;
+}
+
+EXTENSION_ENTRY("test_as", as_entry);
