168 lines
4.2 KiB
C
168 lines
4.2 KiB
C
/*
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* Copyright (C) 2008 Martin Willi
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* Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* $Id$
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*/
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/**
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* @defgroup ha_sync_message ha_sync_message
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* @{ @ingroup ha_sync
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*/
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#ifndef HA_SYNC_MESSAGE_H_
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#define HA_SYNC_MESSAGE_H_
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#include <library.h>
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#include <utils/host.h>
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#include <utils/identification.h>
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#include <sa/ike_sa_id.h>
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/**
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* Protocol version of this implementation
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*/
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#define HA_SYNC_MESSAGE_VERSION 1
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typedef struct ha_sync_message_t ha_sync_message_t;
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typedef enum ha_sync_message_type_t ha_sync_message_type_t;
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typedef enum ha_sync_message_attribute_t ha_sync_message_attribute_t;
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typedef union ha_sync_message_value_t ha_sync_message_value_t;
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/**
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* Type of a sync message
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*/
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enum ha_sync_message_type_t {
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/** add a completely new IKE_SA */
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HA_SYNC_IKE_ADD = 1,
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/** update an existing IKE_SA (message IDs, address update, ...) */
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HA_SYNC_IKE_UPDATE,
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/** delete an existing IKE_SA */
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HA_SYNC_IKE_DELETE,
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/** rekeying an existing IKE_SA, transferring CHILD_SAs to a new one */
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HA_SYNC_IKE_REKEY,
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/** add a new CHILD_SA */
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HA_SYNC_CHILD_ADD,
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/** delete an existing CHILD_SA */
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HA_SYNC_CHILD_DELETE,
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};
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/**
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* Type of attributes contained in a message
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*/
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enum ha_sync_message_attribute_t {
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/** ike_sa_id_t*, to identify IKE_SA */
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HA_SYNC_IKE_ID = 1,
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/** ike_Sa_id_t*, identifies IKE_SA which gets rekeyed */
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HA_SYNC_IKE_REKEY_ID,
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/** identification_t*, local identity */
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HA_SYNC_LOCAL_ID,
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/** identification_t*, remote identity */
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HA_SYNC_REMOTE_ID,
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/** identification_t*, EAP identity */
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HA_SYNC_EAP_ID,
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/** host_t*, local address */
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HA_SYNC_LOCAL_ADDR,
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/** host_t*, remote address */
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HA_SYNC_REMOTE_ADDR,
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/** char*, name of configuration */
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HA_SYNC_CONFIG_NAME,
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/** u_int32_t, bitset of ike_condition_t */
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HA_SYNC_CONDITIONS,
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/** u_int32_t, bitset of ike_extension_t */
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HA_SYNC_EXTENSIONS,
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/** host_t*, local virtual IP */
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HA_SYNC_LOCAL_VIP,
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/** host_t*, remote virtual IP */
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HA_SYNC_REMOTE_VIP,
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/** host_t*, additional MOBIKE peer address */
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HA_SYNC_ADDITIONAL_ADDR,
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/** chunk_t, initiators nonce */
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HA_SYNC_NONCE_I,
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/** chunk_t, responders nonce */
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HA_SYNC_NONCE_R,
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/** chunk_t, diffie hellman shared secret */
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HA_SYNC_SECRET,
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};
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/**
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* Union to enumerate typed attributes in a message
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*/
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union ha_sync_message_value_t {
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u_int8_t u8;
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u_int32_t u32;
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u_int16_t u16;
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chunk_t chnk;
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host_t *host;
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identification_t *id;
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ike_sa_id_t *ike_sa_id;
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char *str;
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};
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/**
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* Abstracted message passed between nodes in a HA cluster.
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*/
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struct ha_sync_message_t {
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/**
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* Get the type of the message.
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*
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* @return message type
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*/
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ha_sync_message_type_t (*get_type)(ha_sync_message_t *this);
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/**
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* Add an attribute to a message.
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*
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* @param attribute attribute type to add
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* @param ... attribute specific data
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*/
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void (*add_attribute)(ha_sync_message_t *this,
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ha_sync_message_attribute_t attribute, ...);
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/**
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* Create an enumerator over all attributes in a message.
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*
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* @return enumerator over attribute, ha_sync_message_value_t
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*/
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enumerator_t* (*create_attribute_enumerator)(ha_sync_message_t *this);
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/**
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* Get the message in a encoded form.
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*
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* @return chunk pointing to internal data
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*/
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chunk_t (*get_encoding)(ha_sync_message_t *this);
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/**
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* Destroy a ha_sync_message_t.
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*/
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void (*destroy)(ha_sync_message_t *this);
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};
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/**
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* Create a new ha_sync_message instance, ready for adding attributes
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*
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* @param version protocol version to create a message from
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* @param type type of the message
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*/
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ha_sync_message_t *ha_sync_message_create(ha_sync_message_type_t type);
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/**
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* Create a ha_sync_message from encoded data.
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*
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* @param data encoded message data
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*/
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ha_sync_message_t *ha_sync_message_parse(chunk_t data);
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#endif /* HA_SYNC_MESSAGE_ @}*/
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