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diff --git a/src/charon/sa/tasks/child_rekey.h b/src/charon/sa/tasks/child_rekey.h
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+++ b/src/charon/sa/tasks/child_rekey.h
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+/**
+ * @file child_rekey.h
+ * 
+ * @brief Interface child_rekey_t.
+ * 
+ */
+
+/*
+ * 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.
+ */
+
+#ifndef CHILD_REKEY_H_
+#define CHILD_REKEY_H_
+
+typedef struct child_rekey_t child_rekey_t;
+
+#include <library.h>
+#include <sa/ike_sa.h>
+#include <sa/child_sa.h>
+#include <sa/tasks/task.h>
+
+/**
+ * @brief Task of type CHILD_REKEY, rekey an established CHILD_SA.
+ *
+ * @b Constructors:
+ *  - child_rekey_create()
+ * 
+ * @ingroup tasks
+ */
+struct child_rekey_t {
+
+	/**
+	 * Implements the task_t interface
+	 */
+	task_t task;
+	
+	/**
+	 * @brief Register a rekeying task which collides with this one
+	 *
+	 * If two peers initiate rekeying at the same time, the collision must
+	 * be handled gracefully. The task manager is aware of what exchanges
+	 * are going on and notifies the outgoing task by passing the incoming.
+	 *
+	 * @param this		task initated by us
+	 * @param other		incoming task
+	 */
+	void (*collide)(child_rekey_t* this, task_t *other);
+};
+
+/**
+ * @brief Create a new CHILD_REKEY task.
+ *
+ * @param ike_sa		IKE_SA this task works for
+ * @param child_sa 		child_sa to rekey, NULL if responder
+ * @return			  	child_rekey task to handle by the task_manager
+ */
+child_rekey_t *child_rekey_create(ike_sa_t *ike_sa, child_sa_t *child_sa);
+
+#endif /* CHILD_REKEY_H_ */