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Annotation of embedaddon/strongswan/src/libcharon/sa/ikev2/tasks/child_rekey.h, revision 1.1.1.1

1.1       misho       1: /*
                      2:  * Copyright (C) 2016 Tobias Brunner
                      3:  * Copyright (C) 2007 Martin Willi
                      4:  * HSR Hochschule fuer Technik Rapperswil
                      5:  *
                      6:  * This program is free software; you can redistribute it and/or modify it
                      7:  * under the terms of the GNU General Public License as published by the
                      8:  * Free Software Foundation; either version 2 of the License, or (at your
                      9:  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
                     10:  *
                     11:  * This program is distributed in the hope that it will be useful, but
                     12:  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
                     13:  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
                     14:  * for more details.
                     15:  */
                     16: 
                     17: /**
                     18:  * @defgroup child_rekey child_rekey
                     19:  * @{ @ingroup tasks_v2
                     20:  */
                     21: 
                     22: #ifndef CHILD_REKEY_H_
                     23: #define CHILD_REKEY_H_
                     24: 
                     25: typedef struct child_rekey_t child_rekey_t;
                     26: 
                     27: #include <library.h>
                     28: #include <sa/ike_sa.h>
                     29: #include <sa/child_sa.h>
                     30: #include <sa/task.h>
                     31: 
                     32: /**
                     33:  * Task of type TASK_CHILD_REKEY, rekey an established CHILD_SA.
                     34:  */
                     35: struct child_rekey_t {
                     36: 
                     37:        /**
                     38:         * Implements the task_t interface
                     39:         */
                     40:        task_t task;
                     41: 
                     42:        /**
                     43:         * Check if the given SA is the redundant CHILD_SA created during a rekey
                     44:         * collision.
                     45:         *
                     46:         * This is called if the other peer deletes the redundant SA before we were
                     47:         * able to handle the CREATE_CHILD_SA response.
                     48:         *
                     49:         * @param child         CHILD_SA to check
                     50:         * @return                      TRUE if the SA is the redundant CHILD_SA
                     51:         */
                     52:        bool (*is_redundant)(child_rekey_t *this, child_sa_t *child);
                     53: 
                     54:        /**
                     55:         * Register a rekeying/delete task which collides with this one
                     56:         *
                     57:         * If two peers initiate rekeying at the same time, the collision must
                     58:         * be handled gracefully. The task manager is aware of what exchanges
                     59:         * are going on and notifies the active task by passing the passive.
                     60:         *
                     61:         * @param other         passive task (adopted)
                     62:         */
                     63:        void (*collide)(child_rekey_t* this, task_t *other);
                     64: };
                     65: 
                     66: /**
                     67:  * Create a new TASK_CHILD_REKEY task.
                     68:  *
                     69:  * @param ike_sa               IKE_SA this task works for
                     70:  * @param protocol             protocol of CHILD_SA to rekey, PROTO_NONE as responder
                     71:  * @param spi                  inbound SPI of CHILD_SA to rekey
                     72:  * @return                             child_rekey task to handle by the task_manager
                     73:  */
                     74: child_rekey_t *child_rekey_create(ike_sa_t *ike_sa, protocol_id_t protocol,
                     75:                                                                  uint32_t spi);
                     76: 
                     77: #endif /** CHILD_REKEY_H_ @}*/