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diff --git a/src/libcharon/sa/ikev2/tasks/ike_mobike.h b/src/libcharon/sa/ikev2/tasks/ike_mobike.h
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+++ b/src/libcharon/sa/ikev2/tasks/ike_mobike.h
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+/*
+ * Copyright (C) 2007 Martin Willi
+ * Hochschule fuer Technik Rapperswil
+ *
+ * This program 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 2 of the License, or (at your
+ * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
+ *
+ * This program 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.
+ */
+
+/**
+ * @defgroup ike_mobike ike_mobike
+ * @{ @ingroup tasks_v2
+ */
+
+#ifndef IKE_MOBIKE_H_
+#define IKE_MOBIKE_H_
+
+typedef struct ike_mobike_t ike_mobike_t;
+
+#include <library.h>
+#include <sa/ike_sa.h>
+#include <sa/task.h>
+#include <utils/packet.h>
+
+/**
+ * Task of type ike_mobike, detects and handles MOBIKE extension.
+ *
+ * The MOBIKE extension is defined in RFC4555. It allows to update IKE
+ * and IPsec tunnel addresses.
+ * This tasks handles the MOBIKE_SUPPORTED notify exchange to detect MOBIKE
+ * support, allows the exchange of ADDITIONAL_*_ADDRESS to exchange additional
+ * endpoints and handles the UPDATE_SA_ADDRESS notify to finally update
+ * endpoints.
+ */
+struct ike_mobike_t {
+
+	/**
+	 * Implements the task_t interface
+	 */
+	task_t task;
+
+	/**
+	 * Use the task to update the list of additional addresses.
+	 */
+	void (*addresses)(ike_mobike_t *this);
+
+	/**
+	 * Use the task to roam to other addresses.
+	 *
+	 * @param address		TRUE to include address list update
+	 */
+	void (*roam)(ike_mobike_t *this, bool address);
+
+	/**
+	 * Use the task for a DPD check which detects changes in NAT mappings.
+	 */
+	void (*dpd)(ike_mobike_t *this);
+
+	/**
+	 * Transmision hook, called by task manager.
+	 *
+	 * The task manager calls this hook whenever it transmits a packet. It
+	 * allows the mobike task to send the packet on multiple paths to do path
+	 * probing.
+	 *
+	 * @param packet		the packet to transmit
+	 */
+	void (*transmit)(ike_mobike_t *this, packet_t *packet);
+
+	/**
+	 * Check if this task is probing for routability.
+	 *
+	 * @return				TRUE if task is probing
+	 */
+	bool (*is_probing)(ike_mobike_t *this);
+};
+
+/**
+ * Create a new ike_mobike task.
+ *
+ * @param ike_sa		IKE_SA this task works for
+ * @param initiator		TRUE if taks is initiated by us
+ * @return				ike_mobike task to handle by the task_manager
+ */
+ike_mobike_t *ike_mobike_create(ike_sa_t *ike_sa, bool initiator);
+
+#endif /** IKE_MOBIKE_H_ @}*/