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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.
*/
#include "payload.h"
#include <encoding/payloads/ike_header.h>
#include <encoding/payloads/sa_payload.h>
#include <encoding/payloads/nonce_payload.h>
#include <encoding/payloads/id_payload.h>
#include <encoding/payloads/ke_payload.h>
#include <encoding/payloads/notify_payload.h>
#include <encoding/payloads/auth_payload.h>
#include <encoding/payloads/cert_payload.h>
#include <encoding/payloads/certreq_payload.h>
#include <encoding/payloads/encryption_payload.h>
#include <encoding/payloads/ts_payload.h>
#include <encoding/payloads/delete_payload.h>
#include <encoding/payloads/vendor_id_payload.h>
#include <encoding/payloads/cp_payload.h>
#include <encoding/payloads/configuration_attribute.h>
#include <encoding/payloads/eap_payload.h>
#include <encoding/payloads/hash_payload.h>
#include <encoding/payloads/fragment_payload.h>
#include <encoding/payloads/unknown_payload.h>
ENUM_BEGIN(payload_type_names, NO_PAYLOAD, NO_PAYLOAD,
"NO_PAYLOAD");
ENUM_NEXT(payload_type_names, SECURITY_ASSOCIATION_V1, CONFIGURATION_V1, NO_PAYLOAD,
"SECURITY_ASSOCIATION_V1",
"PROPOSAL_V1",
"TRANSFORM_V1",
"KEY_EXCHANGE_V1",
"ID_V1",
"CERTIFICATE_V1",
"CERTIFICATE_REQUEST_V1",
"HASH_V1",
"SIGNATURE_V1",
"NONCE_V1",
"NOTIFY_V1",
"DELETE_V1",
"VENDOR_ID_V1",
"CONFIGURATION_V1");
ENUM_NEXT(payload_type_names, NAT_D_V1, NAT_OA_V1, CONFIGURATION_V1,
"NAT_D_V1",
"NAT_OA_V1");
ENUM_NEXT(payload_type_names, SECURITY_ASSOCIATION, GENERIC_SECURE_PASSWORD_METHOD, NAT_OA_V1,
"SECURITY_ASSOCIATION",
"KEY_EXCHANGE",
"ID_INITIATOR",
"ID_RESPONDER",
"CERTIFICATE",
"CERTIFICATE_REQUEST",
"AUTHENTICATION",
"NONCE",
"NOTIFY",
"DELETE",
"VENDOR_ID",
"TRAFFIC_SELECTOR_INITIATOR",
"TRAFFIC_SELECTOR_RESPONDER",
"ENCRYPTED",
"CONFIGURATION",
"EXTENSIBLE_AUTHENTICATION",
"GENERIC_SECURE_PASSWORD_METHOD");
#ifdef ME
ENUM_NEXT(payload_type_names, ID_PEER, ID_PEER, GENERIC_SECURE_PASSWORD_METHOD,
"ID_PEER");
ENUM_NEXT(payload_type_names, NAT_D_DRAFT_00_03_V1, FRAGMENT_V1, ID_PEER,
"NAT_D_DRAFT_V1",
"NAT_OA_DRAFT_V1",
"FRAGMENT");
#else
ENUM_NEXT(payload_type_names, NAT_D_DRAFT_00_03_V1, FRAGMENT_V1, GENERIC_SECURE_PASSWORD_METHOD,
"NAT_D_DRAFT_V1",
"NAT_OA_DRAFT_V1",
"FRAGMENT");
#endif /* ME */
ENUM_NEXT(payload_type_names, HEADER, ENCRYPTED_V1, FRAGMENT_V1,
"HEADER",
"PROPOSAL_SUBSTRUCTURE",
"PROPOSAL_SUBSTRUCTURE_V1",
"TRANSFORM_SUBSTRUCTURE",
"TRANSFORM_SUBSTRUCTURE_V1",
"TRANSFORM_ATTRIBUTE",
"TRANSFORM_ATTRIBUTE_V1",
"TRAFFIC_SELECTOR_SUBSTRUCTURE",
"CONFIGURATION_ATTRIBUTE",
"CONFIGURATION_ATTRIBUTE_V1",
"ENCRYPTED_V1");
ENUM_END(payload_type_names, ENCRYPTED_V1);
/* short forms of payload names */
ENUM_BEGIN(payload_type_short_names, NO_PAYLOAD, NO_PAYLOAD,
"--");
ENUM_NEXT(payload_type_short_names, SECURITY_ASSOCIATION_V1, CONFIGURATION_V1, NO_PAYLOAD,
"SA",
"PROP",
"TRANS",
"KE",
"ID",
"CERT",
"CERTREQ",
"HASH",
"SIG",
"No",
"N",
"D",
"V",
"CP");
ENUM_NEXT(payload_type_short_names, NAT_D_V1, NAT_OA_V1, CONFIGURATION_V1,
"NAT-D",
"NAT-OA");
ENUM_NEXT(payload_type_short_names, SECURITY_ASSOCIATION, GENERIC_SECURE_PASSWORD_METHOD, NAT_OA_V1,
"SA",
"KE",
"IDi",
"IDr",
"CERT",
"CERTREQ",
"AUTH",
"No",
"N",
"D",
"V",
"TSi",
"TSr",
"E",
"CP",
"EAP",
"GSPM");
#ifdef ME
ENUM_NEXT(payload_type_short_names, ID_PEER, ID_PEER, GENERIC_SECURE_PASSWORD_METHOD,
"IDp");
ENUM_NEXT(payload_type_short_names, NAT_D_DRAFT_00_03_V1, FRAGMENT_V1, ID_PEER,
"NAT-D",
"NAT-OA",
"FRAG");
#else
ENUM_NEXT(payload_type_short_names, NAT_D_DRAFT_00_03_V1, FRAGMENT_V1, GENERIC_SECURE_PASSWORD_METHOD,
"NAT-D",
"NAT-OA",
"FRAG");
#endif /* ME */
ENUM_NEXT(payload_type_short_names, HEADER, ENCRYPTED_V1, FRAGMENT_V1,
"HDR",
"PROP",
"PROP",
"TRANS",
"TRANS",
"TRANSATTR",
"TRANSATTR",
"TSSUB",
"CATTR",
"CATTR",
"E");
ENUM_END(payload_type_short_names, ENCRYPTED_V1);
/*
* see header
*/
payload_t *payload_create(payload_type_t type)
{
switch (type)
{
case HEADER:
return (payload_t*)ike_header_create();
case SECURITY_ASSOCIATION:
case SECURITY_ASSOCIATION_V1:
return (payload_t*)sa_payload_create(type);
case PROPOSAL_SUBSTRUCTURE:
case PROPOSAL_SUBSTRUCTURE_V1:
return (payload_t*)proposal_substructure_create(type);
case TRANSFORM_SUBSTRUCTURE:
case TRANSFORM_SUBSTRUCTURE_V1:
return (payload_t*)transform_substructure_create(type);
case TRANSFORM_ATTRIBUTE:
case TRANSFORM_ATTRIBUTE_V1:
return (payload_t*)transform_attribute_create(type);
case NONCE:
case NONCE_V1:
return (payload_t*)nonce_payload_create(type);
case ID_INITIATOR:
case ID_RESPONDER:
case ID_V1:
case NAT_OA_V1:
case NAT_OA_DRAFT_00_03_V1:
#ifdef ME
case ID_PEER:
#endif /* ME */
return (payload_t*)id_payload_create(type);
case AUTHENTICATION:
return (payload_t*)auth_payload_create();
case CERTIFICATE:
case CERTIFICATE_V1:
return (payload_t*)cert_payload_create(type);
case CERTIFICATE_REQUEST:
case CERTIFICATE_REQUEST_V1:
return (payload_t*)certreq_payload_create(type);
case TRAFFIC_SELECTOR_SUBSTRUCTURE:
return (payload_t*)traffic_selector_substructure_create();
case TRAFFIC_SELECTOR_INITIATOR:
return (payload_t*)ts_payload_create(TRUE);
case TRAFFIC_SELECTOR_RESPONDER:
return (payload_t*)ts_payload_create(FALSE);
case KEY_EXCHANGE:
case KEY_EXCHANGE_V1:
return (payload_t*)ke_payload_create(type);
case NOTIFY:
case NOTIFY_V1:
return (payload_t*)notify_payload_create(type);
case DELETE:
case DELETE_V1:
return (payload_t*)delete_payload_create(type, 0);
case VENDOR_ID:
case VENDOR_ID_V1:
return (payload_t*)vendor_id_payload_create(type);
case HASH_V1:
case SIGNATURE_V1:
case NAT_D_V1:
case NAT_D_DRAFT_00_03_V1:
return (payload_t*)hash_payload_create(type);
case CONFIGURATION:
case CONFIGURATION_V1:
return (payload_t*)cp_payload_create(type);
case CONFIGURATION_ATTRIBUTE:
case CONFIGURATION_ATTRIBUTE_V1:
return (payload_t*)configuration_attribute_create(type);
case EXTENSIBLE_AUTHENTICATION:
return (payload_t*)eap_payload_create();
case ENCRYPTED:
case ENCRYPTED_V1:
return (payload_t*)encryption_payload_create(type);
case FRAGMENT_V1:
return (payload_t*)fragment_payload_create();
default:
return (payload_t*)unknown_payload_create(type);
}
}
/**
* See header.
*/
bool payload_is_known(payload_type_t type)
{
if (type == HEADER)
{
return TRUE;
}
if (type >= SECURITY_ASSOCIATION && type <= EXTENSIBLE_AUTHENTICATION)
{
return TRUE;
}
if (type >= SECURITY_ASSOCIATION_V1 && type <= CONFIGURATION_V1)
{
return TRUE;
}
if (type >= NAT_D_V1 && type <= NAT_OA_V1)
{
return TRUE;
}
#ifdef ME
if (type == ID_PEER)
{
return TRUE;
}
#endif
if (type >= NAT_D_DRAFT_00_03_V1 && type <= FRAGMENT_V1)
{
return TRUE;
}
return FALSE;
}
/**
* See header.
*/
void* payload_get_field(payload_t *payload, encoding_type_t type, u_int skip)
{
encoding_rule_t *rule;
int i, count;
count = payload->get_encoding_rules(payload, &rule);
for (i = 0; i < count; i++)
{
if (rule[i].type == type && skip-- == 0)
{
return ((char*)payload) + rule[i].offset;
}
}
return NULL;
}
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