333 lines
9.3 KiB
C
333 lines
9.3 KiB
C
/*
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* Copyright (C) 2005-2010 Martin Willi
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* Copyright (C) 2010 revosec AG
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* Copyright (C) 2005 Jan Hutter
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* HSR 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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#include <stddef.h>
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#include "cp_payload.h"
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#include <encoding/payloads/encodings.h>
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#include <collections/linked_list.h>
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ENUM(config_type_names, CFG_REQUEST, CFG_ACK,
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"CFG_REQUEST",
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"CFG_REPLY",
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"CFG_SET",
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"CFG_ACK",
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);
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typedef struct private_cp_payload_t private_cp_payload_t;
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/**
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* Private data of an cp_payload_t object.
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*/
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struct private_cp_payload_t {
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/**
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* Public cp_payload_t interface.
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*/
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cp_payload_t public;
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/**
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* Next payload type.
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*/
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uint8_t next_payload;
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/**
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* Critical flag.
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*/
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bool critical;
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/**
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* Reserved bits
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*/
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bool reserved_bit[7];
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/**
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* Reserved bytes
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*/
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uint8_t reserved_byte[3];
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/**
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* Length of this payload.
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*/
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uint16_t payload_length;
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/**
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* Identifier field, IKEv1 only
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*/
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uint16_t identifier;
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/**
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* List of attributes, as configuration_attribute_t
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*/
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linked_list_t *attributes;
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/**
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* Config Type.
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*/
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uint8_t cfg_type;
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/**
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* PLV2_CONFIGURATION or PLV1_CONFIGURATION
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*/
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payload_type_t type;
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};
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/**
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* Encoding rules to for an IKEv2 configuration payload
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*/
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static encoding_rule_t encodings_v2[] = {
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/* 1 Byte next payload type, stored in the field next_payload */
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{ U_INT_8, offsetof(private_cp_payload_t, next_payload) },
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/* the critical bit */
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{ FLAG, offsetof(private_cp_payload_t, critical) },
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/* 7 Bit reserved bits */
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{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[0]) },
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{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[1]) },
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{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[2]) },
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{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[3]) },
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{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[4]) },
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{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[5]) },
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{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[6]) },
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/* Length of the whole CP payload*/
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{ PAYLOAD_LENGTH, offsetof(private_cp_payload_t, payload_length) },
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{ U_INT_8, offsetof(private_cp_payload_t, cfg_type) },
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/* 3 reserved bytes */
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{ RESERVED_BYTE, offsetof(private_cp_payload_t, reserved_byte[0])},
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{ RESERVED_BYTE, offsetof(private_cp_payload_t, reserved_byte[1])},
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{ RESERVED_BYTE, offsetof(private_cp_payload_t, reserved_byte[2])},
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/* list of configuration attributes in a list */
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{ PAYLOAD_LIST + PLV2_CONFIGURATION_ATTRIBUTE,
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offsetof(private_cp_payload_t, attributes) },
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};
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/*
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1 2 3
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0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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! Next Payload !C! RESERVED ! Payload Length !
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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! CFG Type ! RESERVED !
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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! !
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~ Configuration Attributes ~
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! !
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*/
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/**
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* Encoding rules to for an IKEv1 configuration payload
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*/
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static encoding_rule_t encodings_v1[] = {
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/* 1 Byte next payload type, stored in the field next_payload */
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{ U_INT_8, offsetof(private_cp_payload_t, next_payload) },
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/* the critical bit */
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{ FLAG, offsetof(private_cp_payload_t, critical) },
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/* 7 Bit reserved bits */
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{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[0]) },
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{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[1]) },
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{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[2]) },
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{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[3]) },
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{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[4]) },
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{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[5]) },
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{ RESERVED_BIT, offsetof(private_cp_payload_t, reserved_bit[6]) },
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/* Length of the whole CP payload*/
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{ PAYLOAD_LENGTH, offsetof(private_cp_payload_t, payload_length) },
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{ U_INT_8, offsetof(private_cp_payload_t, cfg_type) },
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/* 1 reserved bytes */
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{ RESERVED_BYTE, offsetof(private_cp_payload_t, reserved_byte[0])},
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{ U_INT_16, offsetof(private_cp_payload_t, identifier)},
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/* list of configuration attributes in a list */
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{ PAYLOAD_LIST + PLV1_CONFIGURATION_ATTRIBUTE,
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offsetof(private_cp_payload_t, attributes) },
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};
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/*
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1 2 3
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0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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! Next Payload ! RESERVED ! Payload Length !
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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! CFG Type ! RESERVED ! Identifier !
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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! !
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~ Configuration Attributes ~
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! !
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*/
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METHOD(payload_t, verify, status_t,
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private_cp_payload_t *this)
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{
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status_t status = SUCCESS;
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enumerator_t *enumerator;
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payload_t *attribute;
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enumerator = this->attributes->create_enumerator(this->attributes);
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while (enumerator->enumerate(enumerator, &attribute))
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{
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status = attribute->verify(attribute);
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if (status != SUCCESS)
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{
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break;
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}
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}
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enumerator->destroy(enumerator);
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return status;
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}
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METHOD(payload_t, get_encoding_rules, int,
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private_cp_payload_t *this, encoding_rule_t **rules)
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{
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if (this->type == PLV2_CONFIGURATION)
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{
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*rules = encodings_v2;
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return countof(encodings_v2);
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}
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*rules = encodings_v1;
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return countof(encodings_v1);
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}
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METHOD(payload_t, get_header_length, int,
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private_cp_payload_t *this)
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{
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return 8;
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}
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METHOD(payload_t, get_type, payload_type_t,
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private_cp_payload_t *this)
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{
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return this->type;
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}
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METHOD(payload_t, get_next_type, payload_type_t,
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private_cp_payload_t *this)
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{
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return this->next_payload;
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}
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METHOD(payload_t, set_next_type, void,
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private_cp_payload_t *this,payload_type_t type)
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{
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this->next_payload = type;
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}
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/**
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* recompute the length of the payload.
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*/
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static void compute_length(private_cp_payload_t *this)
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{
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enumerator_t *enumerator;
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payload_t *attribute;
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this->payload_length = get_header_length(this);
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enumerator = this->attributes->create_enumerator(this->attributes);
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while (enumerator->enumerate(enumerator, &attribute))
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{
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this->payload_length += attribute->get_length(attribute);
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}
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enumerator->destroy(enumerator);
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}
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METHOD(payload_t, get_length, size_t,
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private_cp_payload_t *this)
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{
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return this->payload_length;
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}
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METHOD(cp_payload_t, create_attribute_enumerator, enumerator_t*,
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private_cp_payload_t *this)
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{
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return this->attributes->create_enumerator(this->attributes);
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}
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METHOD(cp_payload_t, add_attribute, void,
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private_cp_payload_t *this, configuration_attribute_t *attribute)
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{
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this->attributes->insert_last(this->attributes, attribute);
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compute_length(this);
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}
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METHOD(cp_payload_t, get_config_type, config_type_t,
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private_cp_payload_t *this)
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{
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return this->cfg_type;
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}
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METHOD(cp_payload_t, get_identifier, uint16_t,
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private_cp_payload_t *this)
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{
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return this->identifier;
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}
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METHOD(cp_payload_t, set_identifier, void,
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private_cp_payload_t *this, uint16_t identifier)
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{
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this->identifier = identifier;
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}
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METHOD2(payload_t, cp_payload_t, destroy, void,
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private_cp_payload_t *this)
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{
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this->attributes->destroy_offset(this->attributes,
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offsetof(configuration_attribute_t, destroy));
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free(this);
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}
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/*
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* Described in header.
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*/
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cp_payload_t *cp_payload_create_type(payload_type_t type, config_type_t cfg_type)
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{
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private_cp_payload_t *this;
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INIT(this,
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.public = {
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.payload_interface = {
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.verify = _verify,
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.get_encoding_rules = _get_encoding_rules,
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.get_header_length = _get_header_length,
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.get_length = _get_length,
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.get_next_type = _get_next_type,
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.set_next_type = _set_next_type,
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.get_type = _get_type,
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.destroy = _destroy,
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},
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.create_attribute_enumerator = _create_attribute_enumerator,
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.add_attribute = _add_attribute,
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.get_type = _get_config_type,
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.get_identifier = _get_identifier,
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.set_identifier = _set_identifier,
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.destroy = _destroy,
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},
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.next_payload = PL_NONE,
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.payload_length = get_header_length(this),
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.attributes = linked_list_create(),
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.cfg_type = cfg_type,
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.type = type,
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);
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return &this->public;
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}
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/*
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* Described in header.
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*/
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cp_payload_t *cp_payload_create(payload_type_t type)
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{
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return cp_payload_create_type(type, CFG_REQUEST);
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}
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