redesigned IKE_SA using a transaction mechanism:

removed old state machine
  reimplemented IKE_SA setup and delete
  implemented dead peer detection
  implemented keep-alives
  a lot of fixes
  no rekeying yet

src/charon/sa/transactions/delete_ike_sa.h

@@ -0,0 +1,83 @@
+/**
+ * @file delete_ike_sa.h
+ * 
+ * @brief Interface of transaction delete_ike_sa.
+ * 
+ */
+
+/*
+ * Copyright (C) 2006 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 DELETE_IKE_SA_H_
+#define DELETE_IKE_SA_H_
+
+#include <sa/ike_sa.h>
+#include <sa/transactions/transaction.h>
+
+
+typedef struct delete_ike_sa_t delete_ike_sa_t;
+
+/**
+ * @brief A transaction used to delete the IKE_SA.
+ *
+ * Notation as follows:
+ * Mx{D} means: Message, with message ID "x", containing a Delete payload
+ *
+ * The clarifcation Document says in 5.8, that a IKE_SA delete should not
+ * be acknowledged with the same delete. This only makes sense for CHILD_SAs,
+ * as they are paired. IKE_SAs are not, there is only one for both ends.
+ *
+ * Normal case:
+ * ----------------
+ * Mx{D}  -->
+ *       <--      Mx{}
+ * Delete request is sent, and we wait for the acknowledge.
+ *
+ * Special case 1:
+ * ---------------
+ * Mx{D}  -->
+ *       <--      My{D}
+ * My{}   -->
+ *       <--      Mx{}
+ * Both initate a delete at the same time. We ack the delete, but wait for
+ * our delete to be acknowledged.
+ *
+ * @b Constructors:
+ *  - delete_ike_sa_create()
+ *  - transaction_create() with the appropriate message
+ *
+ * @ingroup transactions
+ */
+struct delete_ike_sa_t {
+	
+	/**
+	 * The transaction_t interface.
+	 */
+	transaction_t transaction;
+};
+
+/**
+ * @brief Create a new transaction which deletes the IKE_SA.
+ *
+ * @param ike_sa		assigned IKE_SA
+ * @param message_id	message ids used in this transaction
+ * @return				created delete_ike_sa transaction
+ *
+ * @ingroup transactions
+ */
+delete_ike_sa_t *delete_ike_sa_create(ike_sa_t *ike_sa, u_int32_t message_id);
+
+#endif /* DELETE_IKE_SA_H_ */