Moving charon to libcharon.
This commit is contained in:
Tobias Brunner
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/*
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* Copyright (C) 2005-2009 Martin Willi
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* Copyright (C) 2005 Jan Hutter
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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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#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 <utils/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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*/
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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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u_int8_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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* Length of this payload.
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*/
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u_int16_t payload_length;
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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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u_int8_t type;
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};
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/**
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* Encoding rules to parse or generate a IKEv2-CP Payload
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*
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* The defined offsets are the positions in a object of type
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* private_cp_payload_t.
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*
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*/
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encoding_rule_t cp_payload_encodings[] = {
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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, nowhere stored */
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{ RESERVED_BIT, 0 },
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{ RESERVED_BIT, 0 },
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{ RESERVED_BIT, 0 },
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{ RESERVED_BIT, 0 },
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{ RESERVED_BIT, 0 },
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{ RESERVED_BIT, 0 },
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{ RESERVED_BIT, 0 },
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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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/* Proposals are stored in a proposal substructure,
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offset points to a linked_list_t pointer */
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{ U_INT_8, offsetof(private_cp_payload_t, type) },
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{ RESERVED_BYTE,0 },
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{ RESERVED_BYTE,0 },
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{ RESERVED_BYTE,0 },
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{ CONFIGURATION_ATTRIBUTES, 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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* Implementation of payload_t.verify.
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*/
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static status_t verify(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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/**
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* Implementation of payload_t.get_encoding_rules.
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*/
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static void get_encoding_rules(private_cp_payload_t *this,
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encoding_rule_t **rules, size_t *rule_count)
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{
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*rules = cp_payload_encodings;
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*rule_count = sizeof(cp_payload_encodings) / sizeof(encoding_rule_t);
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}
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/**
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* Implementation of payload_t.get_type.
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*/
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static payload_type_t get_type(private_cp_payload_t *this)
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{
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return CONFIGURATION;
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}
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/**
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* Implementation of payload_t.get_next_type.
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*/
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static payload_type_t get_next_type(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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/**
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* Implementation of payload_t.set_next_type.
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*/
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static void set_next_type(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 = CP_PAYLOAD_HEADER_LENGTH;
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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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/**
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* Implementation of payload_t.get_length.
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*/
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static size_t get_length(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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/**
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* Implementation of cp_payload_t.create_attribute_enumerator.
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*/
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static enumerator_t *create_attribute_enumerator(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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/**
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* Implementation of cp_payload_t.add_attribute.
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*/
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static void add_attribute(private_cp_payload_t *this,
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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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/**
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* Implementation of cp_payload_t.get_type.
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*/
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static config_type_t get_config_type(private_cp_payload_t *this)
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{
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return this->type;
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}
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/**
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* Implementation of payload_t.destroy and cp_payload_t.destroy.
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*/
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static void destroy(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()
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{
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private_cp_payload_t *this = malloc_thing(private_cp_payload_t);
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this->public.payload_interface.verify = (status_t (*) (payload_t *))verify;
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this->public.payload_interface.get_encoding_rules = (void (*) (payload_t *, encoding_rule_t **, size_t *) ) get_encoding_rules;
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this->public.payload_interface.get_length = (size_t (*) (payload_t *)) get_length;
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this->public.payload_interface.get_next_type = (payload_type_t (*) (payload_t *)) get_next_type;
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this->public.payload_interface.set_next_type = (void (*) (payload_t *,payload_type_t)) set_next_type;
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this->public.payload_interface.get_type = (payload_type_t (*) (payload_t *)) get_type;
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this->public.payload_interface.destroy = (void (*) (payload_t *))destroy;
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this->public.create_attribute_enumerator = (enumerator_t*(*)(cp_payload_t *))create_attribute_enumerator;
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this->public.add_attribute = (void (*) (cp_payload_t *,configuration_attribute_t*))add_attribute;
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this->public.get_type = (config_type_t (*) (cp_payload_t *))get_config_type;
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this->public.destroy = (void (*)(cp_payload_t *))destroy;
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/* set default values of the fields */
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this->critical = FALSE;
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this->next_payload = NO_PAYLOAD;
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this->payload_length = CP_PAYLOAD_HEADER_LENGTH;
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this->attributes = linked_list_create();
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this->type = CFG_REQUEST;
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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_type(config_type_t type)
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{
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private_cp_payload_t *this = (private_cp_payload_t*)cp_payload_create();
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this->type = type;
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return &this->public;
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}
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