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/*
* Copyright (C) 2007 Tobias Brunner
* Copyright (C) 2005-2006 Martin Willi
* Copyright (C) 2005 Jan Hutter
* 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 payload payload
* @{ @ingroup payloads
*/
#ifndef PAYLOAD_H_
#define PAYLOAD_H_
typedef enum payload_type_t payload_type_t;
typedef struct payload_t payload_t;
#include <library.h>
#include <encoding/payloads/encodings.h>
/**
* Payload-Types of a IKEv2-Message.
*
* Header and substructures are also defined as
* payload types with values from PRIVATE USE space.
*/
enum payload_type_t{
/**
* End of payload list in next_payload
*/
NO_PAYLOAD = 0,
/**
* The security association (SA) payload containing proposals.
*/
SECURITY_ASSOCIATION = 33,
/**
* The key exchange (KE) payload containing diffie-hellman values.
*/
KEY_EXCHANGE = 34,
/**
* Identification for the original initiator (IDi).
*/
ID_INITIATOR = 35,
/**
* Identification for the original responder (IDr).
*/
ID_RESPONDER = 36,
/**
* Certificate payload with certificates (CERT).
*/
CERTIFICATE = 37,
/**
* Certificate request payload (CERTREQ).
*/
CERTIFICATE_REQUEST = 38,
/**
* Authentication payload contains auth data (AUTH).
*/
AUTHENTICATION = 39,
/**
* Nonces, for initator and responder (Ni, Nr, N)
*/
NONCE = 40,
/**
* Notify paylaod (N).
*/
NOTIFY = 41,
/**
* Delete payload (D)
*/
DELETE = 42,
/**
* Vendor id paylpoad (V).
*/
VENDOR_ID = 43,
/**
* Traffic selector for the original initiator (TSi).
*/
TRAFFIC_SELECTOR_INITIATOR = 44,
/**
* Traffic selector for the original responser (TSr).
*/
TRAFFIC_SELECTOR_RESPONDER = 45,
/**
* Encryption payload, contains other payloads (E).
*/
ENCRYPTED = 46,
/**
* Configuration payload (CP).
*/
CONFIGURATION = 47,
/**
* Extensible authentication payload (EAP).
*/
EXTENSIBLE_AUTHENTICATION = 48,
#ifdef ME
/**
* Identification payload for peers has a value from
* the PRIVATE USE space.
*/
ID_PEER = 128,
#endif /* ME */
/**
* Header has a value of PRIVATE USE space.
*
* This payload type is not sent over wire and just
* used internally to handle IKEv2-Header like a payload.
*/
HEADER = 256,
/**
* PROPOSAL_SUBSTRUCTURE has a value of PRIVATE USE space.
*
* This payload type is not sent over wire and just
* used internally to handle a proposal substructure like a payload.
*/
PROPOSAL_SUBSTRUCTURE = 257,
/**
* TRANSFORM_SUBSTRUCTURE has a value of PRIVATE USE space.
*
* This payload type is not sent over wire and just
* used internally to handle a transform substructure like a payload.
*/
TRANSFORM_SUBSTRUCTURE = 258,
/**
* TRANSFORM_ATTRIBUTE has a value of PRIVATE USE space.
*
* This payload type is not sent over wire and just
* used internally to handle a transform attribute like a payload.
*/
TRANSFORM_ATTRIBUTE = 259,
/**
* TRAFFIC_SELECTOR_SUBSTRUCTURE has a value of PRIVATE USE space.
*
* This payload type is not sent over wire and just
* used internally to handle a transform selector like a payload.
*/
TRAFFIC_SELECTOR_SUBSTRUCTURE = 260,
/**
* CONFIGURATION_ATTRIBUTE has a value of PRIVATE USE space.
*
* This payload type is not sent over wire and just
* used internally to handle a transform attribute like a payload.
*/
CONFIGURATION_ATTRIBUTE = 261,
};
/**
* enum names for payload_type_t.
*/
extern enum_name_t *payload_type_names;
/**
* enum names for payload_type_t in a short form.
*/
extern enum_name_t *payload_type_short_names;
/**
* Generic interface for all payload types (incl.header and substructures).
*
* To handle all kinds of payloads on a generic way, this interface must
* be implemented by every payload. This allows parser_t/generator_t a simple
* handling of all payloads.
*/
struct payload_t {
/**
* Get encoding rules for this payload.
*
* @param rules location to store pointer of first rule
* @param rule_count location to store number of rules
*/
void (*get_encoding_rules) (payload_t *this, encoding_rule_t **rules, size_t *rule_count);
/**
* Get type of payload.
*
* @return type of this payload
*/
payload_type_t (*get_type) (payload_t *this);
/**
* Get type of next payload or NO_PAYLOAD (0) if this is the last one.
*
* @return type of next payload
*/
payload_type_t (*get_next_type) (payload_t *this);
/**
* Set type of next payload.
*
* @param type type of next payload
*/
void (*set_next_type) (payload_t *this,payload_type_t type);
/**
* Get length of payload.
*
* @return length of this payload
*/
size_t (*get_length) (payload_t *this);
/**
* Verifies payload structure and makes consistence check.
*
* @return SUCCESS, FAILED if consistence not given
*/
status_t (*verify) (payload_t *this);
/**
* Destroys a payload and all included substructures.
*/
void (*destroy) (payload_t *this);
};
/**
* Create an empty payload.
*
* Useful for the parser, who wants a generic constructor for all payloads.
* It supports all payload_t methods. If a payload type is not known,
* an unknwon_paylod is created with the chunk of data in it.
*
* @param type type of the payload to create
* @return payload_t object
*/
payload_t *payload_create(payload_type_t type);
/**
* Check if a specific payload is implemented, or handled as unknown payload.
*
* @param type type of the payload to check
* @return FALSE if payload type handled as unknown payload
*/
bool payload_is_known(payload_type_t type);
/**
* Get the value field in a payload using encoding rules.
*
* @param payload payload to look up a field
* @param type encoding rule type to look up
* @param skip number rules of type to skip, 0 to get first
* @return type specific value pointer, NULL if not found
*/
void* payload_get_field(payload_t *payload, encoding_type_t type, u_int skip);
#endif /** PAYLOAD_H_ @}*/
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