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diff --git a/src/include/gnunet_nat_auto_service.h b/src/include/gnunet_nat_auto_service.h
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+++ b/src/include/gnunet_nat_auto_service.h
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+/*
+     This file is part of GNUnet.
+     Copyright (C) 2007-2017 GNUnet e.V.
+
+     GNUnet is free software; you can redistribute it and/or modify
+     it under the terms of the GNU General Public License as published
+     by the Free Software Foundation; either version 3, or (at your
+     option) any later version.
+
+     GNUnet is distributed in the hope that it will be useful, but
+     WITHOUT ANY WARRANTY; without even the implied warranty of
+     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+     General Public License for more details.
+
+     You should have received a copy of the GNU General Public License
+     along with GNUnet; see the file COPYING.  If not, write to the
+     Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+     Boston, MA 02110-1301, USA.
+*/
+
+/**
+ * @author Christian Grothoff
+ * @author Milan Bouchet-Valat
+ *
+ * @file
+ * Service for testing and autoconfiguration of
+ * NAT traversal functionality
+ *
+ * @defgroup nat  NAT testing library
+ *
+ * @{
+ */
+
+#ifndef GNUNET_NAT_AUTO_SERVICE_H
+#define GNUNET_NAT_AUTO_SERVICE_H
+
+#include "gnunet_util_lib.h"
+#include "gnunet_nat_service.h"
+
+
+/**
+ * Handle to a NAT test.
+ */
+struct GNUNET_NAT_AUTO_Test;
+
+
+/**
+ * Start testing if NAT traversal works using the given configuration.
+ *  The transport adapters should be down while using this function.
+ *
+ * @param cfg configuration for the NAT traversal
+ * @param proto protocol to test, i.e. IPPROTO_TCP or IPPROTO_UDP
+ * @param section_name configuration section to use for configuration
+ * @param report function to call with the result of the test
+ * @param report_cls closure for @a report
+ * @return handle to cancel NAT test
+ */
+struct GNUNET_NAT_AUTO_Test *
+GNUNET_NAT_AUTO_test_start (const struct GNUNET_CONFIGURATION_Handle *cfg,
+                            uint8_t proto,
+                            const char *section_name,
+                            GNUNET_NAT_TestCallback report,
+                            void *report_cls);
+
+
+/**
+ * Stop an active NAT test.
+ *
+ * @param tst test to stop.
+ */
+void
+GNUNET_NAT_AUTO_test_stop (struct GNUNET_NAT_AUTO_Test *tst);
+
+
+/**
+ * Handle to auto-configuration in progress.
+ */
+struct GNUNET_NAT_AUTO_AutoHandle;
+
+
+/**
+ * Converts `enum GNUNET_NAT_StatusCode` to string
+ *
+ * @param err error code to resolve to a string
+ * @return point to a static string containing the error code
+ */
+const char *
+GNUNET_NAT_AUTO_status2string (enum GNUNET_NAT_StatusCode err);
+
+
+/**
+ * Function called with the result from the autoconfiguration.
+ *
+ * @param cls closure
+ * @param diff minimal suggested changes to the original configuration
+ *             to make it work (as best as we can)
+ * @param result #GNUNET_NAT_ERROR_SUCCESS on success, otherwise the specific error code
+ * @param type what the situation of the NAT
+ */
+typedef void
+(*GNUNET_NAT_AUTO_AutoResultCallback)(void *cls,
+                                      const struct GNUNET_CONFIGURATION_Handle *diff,
+                                      enum GNUNET_NAT_StatusCode result,
+                                      enum GNUNET_NAT_Type type);
+
+
+/**
+ * Start auto-configuration routine.  The transport adapters should
+ * be stopped while this function is called.
+ *
+ * @param cfg initial configuration
+ * @param cb function to call with autoconfiguration result
+ * @param cb_cls closure for @a cb
+ * @return handle to cancel operation
+ */
+struct GNUNET_NAT_AUTO_AutoHandle *
+GNUNET_NAT_AUTO_autoconfig_start (const struct GNUNET_CONFIGURATION_Handle *cfg,
+                                  GNUNET_NAT_AUTO_AutoResultCallback cb,
+                                  void *cb_cls);
+
+
+/**
+ * Abort autoconfiguration.
+ *
+ * @param ah handle for operation to abort
+ */
+void
+GNUNET_NAT_AUTO_autoconfig_cancel (struct GNUNET_NAT_AUTO_AutoHandle *ah);
+
+
+#endif
+
+/** @} */  /* end of group */
+
+/* end of gnunet_nat_auto_service.h */