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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/encrypted_payload.h>
#include <encoding/payloads/encrypted_fragment_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, PL_NONE, PL_NONE,
"PL_NONE");
ENUM_NEXT(payload_type_names, PLV1_SECURITY_ASSOCIATION, PLV1_CONFIGURATION, PL_NONE,
"SECURITY_ASSOCIATION_V1",
"PROPOSAL_V1",
"TRANSFORM_V1",
"KEY_EXCHANGE_V1",
"ID_V1",
"CERTIFICATE_V1",
"CERTREQ_V1",
"HASH_V1",
"SIGNATURE_V1",
"NONCE_V1",
"NOTIFY_V1",
"DELETE_V1",
"VENDOR_ID_V1",
"CONFIGURATION_V1");
ENUM_NEXT(payload_type_names, PLV1_NAT_D, PLV1_NAT_OA, PLV1_CONFIGURATION,
"NAT_D_V1",
"NAT_OA_V1");
ENUM_NEXT(payload_type_names, PLV2_SECURITY_ASSOCIATION, PLV2_FRAGMENT, PLV1_NAT_OA,
"SECURITY_ASSOCIATION",
"KEY_EXCHANGE",
"ID_INITIATOR",
"ID_RESPONDER",
"CERTIFICATE",
"CERTREQ",
"AUTH",
"NONCE",
"NOTIFY",
"DELETE",
"VENDOR_ID",
"TS_INITIATOR",
"TS_RESPONDER",
"ENCRYPTED",
"CONFIGURATION",
"EAP",
"GSPM",
"GROUP_ID",
"GROUP_SECURITY_ASSOCIATION",
"KEY_DOWNLOAD",
"ENCRYPTED_FRAGMENT");
#ifdef ME
ENUM_NEXT(payload_type_names, PLV2_ID_PEER, PLV2_ID_PEER, PLV2_FRAGMENT,
"ID_PEER");
ENUM_NEXT(payload_type_names, PLV1_NAT_D_DRAFT_00_03, PLV1_FRAGMENT, PLV2_ID_PEER,
"NAT_D_DRAFT_V1",
"NAT_OA_DRAFT_V1",
"FRAGMENT");
#else
ENUM_NEXT(payload_type_names, PLV1_NAT_D_DRAFT_00_03, PLV1_FRAGMENT, PLV2_FRAGMENT,
"NAT_D_DRAFT_V1",
"NAT_OA_DRAFT_V1",
"FRAGMENT");
#endif /* ME */
ENUM_NEXT(payload_type_names, PL_HEADER, PLV1_ENCRYPTED, PLV1_FRAGMENT,
"HEADER",
"UNKNOWN",
"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, PLV1_ENCRYPTED);
/* short forms of payload names */
ENUM_BEGIN(payload_type_short_names, PL_NONE, PL_NONE,
"--");
ENUM_NEXT(payload_type_short_names, PLV1_SECURITY_ASSOCIATION, PLV1_CONFIGURATION, PL_NONE,
"SA",
"PROP",
"TRANS",
"KE",
"ID",
"CERT",
"CERTREQ",
"HASH",
"SIG",
"No",
"N",
"D",
"V",
"CP");
ENUM_NEXT(payload_type_short_names, PLV1_NAT_D, PLV1_NAT_OA, PLV1_CONFIGURATION,
"NAT-D",
"NAT-OA");
ENUM_NEXT(payload_type_short_names, PLV2_SECURITY_ASSOCIATION, PLV2_FRAGMENT, PLV1_NAT_OA,
"SA",
"KE",
"IDi",
"IDr",
"CERT",
"CERTREQ",
"AUTH",
"No",
"N",
"D",
"V",
"TSi",
"TSr",
"E",
"CP",
"EAP",
"GSPM",
"IDg",
"GSA",
"KD",
"EF");
#ifdef ME
ENUM_NEXT(payload_type_short_names, PLV2_ID_PEER, PLV2_ID_PEER, PLV2_FRAGMENT,
"IDp");
ENUM_NEXT(payload_type_short_names, PLV1_NAT_D_DRAFT_00_03, PLV1_FRAGMENT, PLV2_ID_PEER,
"NAT-D",
"NAT-OA",
"FRAG");
#else
ENUM_NEXT(payload_type_short_names, PLV1_NAT_D_DRAFT_00_03, PLV1_FRAGMENT, PLV2_FRAGMENT,
"NAT-D",
"NAT-OA",
"FRAG");
#endif /* ME */
ENUM_NEXT(payload_type_short_names, PL_HEADER, PLV1_ENCRYPTED, PLV1_FRAGMENT,
"HDR",
"UNKN",
"PROP",
"PROP",
"TRANS",
"TRANS",
"TRANSATTR",
"TRANSATTR",
"TSSUB",
"CATTR",
"CATTR",
"E");
ENUM_END(payload_type_short_names, PLV1_ENCRYPTED);
/*
* see header
*/
payload_t *payload_create(payload_type_t type)
{
switch (type)
{
case PL_HEADER:
return (payload_t*)ike_header_create();
case PLV2_SECURITY_ASSOCIATION:
case PLV1_SECURITY_ASSOCIATION:
return (payload_t*)sa_payload_create(type);
case PLV2_PROPOSAL_SUBSTRUCTURE:
case PLV1_PROPOSAL_SUBSTRUCTURE:
return (payload_t*)proposal_substructure_create(type);
case PLV2_TRANSFORM_SUBSTRUCTURE:
case PLV1_TRANSFORM_SUBSTRUCTURE:
return (payload_t*)transform_substructure_create(type);
case PLV2_TRANSFORM_ATTRIBUTE:
case PLV1_TRANSFORM_ATTRIBUTE:
return (payload_t*)transform_attribute_create(type);
case PLV2_NONCE:
case PLV1_NONCE:
return (payload_t*)nonce_payload_create(type);
case PLV2_ID_INITIATOR:
case PLV2_ID_RESPONDER:
case PLV1_ID:
case PLV1_NAT_OA:
case PLV1_NAT_OA_DRAFT_00_03:
#ifdef ME
case PLV2_ID_PEER:
#endif /* ME */
return (payload_t*)id_payload_create(type);
case PLV2_AUTH:
return (payload_t*)auth_payload_create();
case PLV2_CERTIFICATE:
case PLV1_CERTIFICATE:
return (payload_t*)cert_payload_create(type);
case PLV2_CERTREQ:
case PLV1_CERTREQ:
return (payload_t*)certreq_payload_create(type);
case PLV2_TRAFFIC_SELECTOR_SUBSTRUCTURE:
return (payload_t*)traffic_selector_substructure_create();
case PLV2_TS_INITIATOR:
return (payload_t*)ts_payload_create(TRUE);
case PLV2_TS_RESPONDER:
return (payload_t*)ts_payload_create(FALSE);
case PLV2_KEY_EXCHANGE:
case PLV1_KEY_EXCHANGE:
return (payload_t*)ke_payload_create(type);
case PLV2_NOTIFY:
case PLV1_NOTIFY:
return (payload_t*)notify_payload_create(type);
case PLV2_DELETE:
case PLV1_DELETE:
return (payload_t*)delete_payload_create(type, 0);
case PLV2_VENDOR_ID:
case PLV1_VENDOR_ID:
return (payload_t*)vendor_id_payload_create(type);
case PLV1_HASH:
case PLV1_SIGNATURE:
case PLV1_NAT_D:
case PLV1_NAT_D_DRAFT_00_03:
return (payload_t*)hash_payload_create(type);
case PLV2_CONFIGURATION:
case PLV1_CONFIGURATION:
return (payload_t*)cp_payload_create(type);
case PLV2_CONFIGURATION_ATTRIBUTE:
case PLV1_CONFIGURATION_ATTRIBUTE:
return (payload_t*)configuration_attribute_create(type);
case PLV2_EAP:
return (payload_t*)eap_payload_create();
case PLV2_ENCRYPTED:
case PLV1_ENCRYPTED:
return (payload_t*)encrypted_payload_create(type);
case PLV1_FRAGMENT:
return (payload_t*)fragment_payload_create();
case PLV2_FRAGMENT:
return (payload_t*)encrypted_fragment_payload_create();
default:
return (payload_t*)unknown_payload_create(type);
}
}
/**
* See header.
*/
bool payload_is_known(payload_type_t type, uint8_t maj_ver)
{
if (type >= PL_HEADER)
{
return TRUE;
}
switch (maj_ver)
{
case 0:
case IKEV1_MAJOR_VERSION:
if (type >= PLV1_SECURITY_ASSOCIATION && type <= PLV1_CONFIGURATION)
{
return TRUE;
}
if (type >= PLV1_NAT_D && type <= PLV1_NAT_OA)
{
return TRUE;
}
if (type >= PLV1_NAT_D_DRAFT_00_03 && type <= PLV1_FRAGMENT)
{
return TRUE;
}
if (maj_ver)
{
break;
}
/* fall-through */
case IKEV2_MAJOR_VERSION:
if (type >= PLV2_SECURITY_ASSOCIATION && type <= PLV2_EAP)
{
return TRUE;
}
if (type == PLV2_FRAGMENT)
{
return TRUE;
}
#ifdef ME
if (type == PLV2_ID_PEER)
{
return TRUE;
}
#endif
break;
default:
break;
}
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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