This commit is contained in:
Jan Hutter
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/**
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* @file id_payload.h
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*
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* @brief Interface of id_payload_t.
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*
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*/
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/*
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* Copyright (C) 2005 Jan Hutter, Martin Willi
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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 "id_payload.h"
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#include <encoding/payloads/encodings.h>
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#include <utils/allocator.h>
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/**
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* String mappings for id_type_t.
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*/
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mapping_t id_type_m[] = {
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{ID_IPV4_ADDR, "ID_IPV4_ADDR"},
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{ID_FQDN, "ID_FQDN"},
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{ID_RFC822_ADDR, "ID_RFC822_ADDR"},
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{ID_IPV6_ADDR, "ID_IPV6_ADDR"},
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{ID_DER_ASN1_DN, "ID_DER_ASN1_DN"},
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{ID_DER_ASN1_GN, "ID_DER_ASN1_GN"},
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{ID_KEY_ID, "ID_KEY_ID"},
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{MAPPING_END, NULL}
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};
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typedef struct private_id_payload_t private_id_payload_t;
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/**
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* Private data of an id_payload_t object.
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*
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*/
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struct private_id_payload_t {
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/**
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* Public id_payload_t interface.
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*/
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id_payload_t public;
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/**
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* TRUE if this ID payload is of type IDi, FALSE for IDr
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*/
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bool is_initiator;
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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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* Type of the ID Data.
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*/
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u_int8_t id_type;
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/**
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* The contained id data value.
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*/
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chunk_t id_data;
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/**
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* @brief Computes the length of this payload.
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*
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* @param this calling private_id_payload_t object
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*/
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void (*compute_length) (private_id_payload_t *this);
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};
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/**
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* Encoding rules to parse or generate a ID 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_id_payload_t.
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*
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*/
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encoding_rule_t id_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_id_payload_t, next_payload) },
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/* the critical bit */
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{ FLAG, offsetof(private_id_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 payload*/
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{ PAYLOAD_LENGTH, offsetof(private_id_payload_t, payload_length) },
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/* 1 Byte ID type*/
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{ U_INT_8, offsetof(private_id_payload_t, id_type) },
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/* 3 reserved bytes */
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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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/* some id data bytes, length is defined in PAYLOAD_LENGTH */
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{ ID_DATA, offsetof(private_id_payload_t, id_data) }
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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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! ID Type ! RESERVED |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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! !
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~ Identification Data ~
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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_id_payload_t *this)
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{
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if (this->critical)
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{
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/* critical bit is set! */
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return FAILED;
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}
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return SUCCESS;
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}
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/**
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* Implementation of id_payload_t.get_encoding_rules.
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*/
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static void get_encoding_rules(private_id_payload_t *this, encoding_rule_t **rules, size_t *rule_count)
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{
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*rules = id_payload_encodings;
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*rule_count = sizeof(id_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_payload_type(private_id_payload_t *this)
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{
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return ((this->is_initiator) ? ID_INITIATOR : ID_RESPONDER);
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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_id_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_id_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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* Implementation of payload_t.get_length.
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*/
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static size_t get_length(private_id_payload_t *this)
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{
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this->compute_length(this);
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return this->payload_length;
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}
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/**
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* Implementation of id_payload_t.set_type.
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*/
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static void set_id_type (private_id_payload_t *this, id_type_t type)
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{
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this->id_type = type;
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}
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/**
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* Implementation of id_payload_t.get_id_type.
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*/
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static id_type_t get_id_type (private_id_payload_t *this)
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{
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return (this->id_type);
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}
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/**
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* Implementation of id_payload_t.set_data.
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*/
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static void set_data (private_id_payload_t *this, chunk_t data)
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{
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if (this->id_data.ptr != NULL)
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{
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allocator_free_chunk(&(this->id_data));
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}
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this->id_data.ptr = allocator_clone_bytes(data.ptr,data.len);
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this->id_data.len = data.len;
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}
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/**
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* Implementation of id_payload_t.get_data.
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*/
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static chunk_t get_data (private_id_payload_t *this)
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{
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chunk_t cloned_data;
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if (this->id_data.ptr == NULL)
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{
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return (this->id_data);
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}
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cloned_data.ptr = allocator_clone_bytes(this->id_data.ptr,this->id_data.len);
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cloned_data.len = this->id_data.len;
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return cloned_data;
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}
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/**
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* Implementation of id_payload_t.get_initiator.
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*/
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static bool get_initiator (private_id_payload_t *this)
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{
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return (this->is_initiator);
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}
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/**
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* Implementation of id_payload_t.set_initiator.
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*/
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static void set_initiator (private_id_payload_t *this,bool is_initiator)
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{
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this->is_initiator = is_initiator;
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}
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/**
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* Implementation of payload_t.destroy and id_payload_t.destroy.
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*/
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static void destroy(private_id_payload_t *this)
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{
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if (this->id_data.ptr != NULL)
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{
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allocator_free_chunk(&(this->id_data));
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}
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allocator_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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id_payload_t *id_payload_create(bool is_initiator)
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{
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private_id_payload_t *this = allocator_alloc_thing(private_id_payload_t);
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/* interface functions */
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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_payload_type;
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this->public.payload_interface.destroy = (void (*) (payload_t *))destroy;
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/* public functions */
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this->public.destroy = (void (*) (id_payload_t *)) destroy;
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this->public.set_id_type = (void (*) (id_payload_t *,id_type_t)) set_id_type;
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this->public.get_id_type = (id_type_t (*) (id_payload_t *)) get_id_type;
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this->public.set_data = (void (*) (id_payload_t *,chunk_t)) set_data;
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this->public.get_data = (chunk_t (*) (id_payload_t *)) get_data;
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this->public.get_initiator = (bool (*) (id_payload_t *)) get_initiator;
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this->public.set_initiator = (void (*) (id_payload_t *,bool)) set_initiator;
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/* private variables */
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this->critical = FALSE;
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this->next_payload = NO_PAYLOAD;
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this->payload_length =ID_PAYLOAD_HEADER_LENGTH;
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this->id_data = CHUNK_INITIALIZER;
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this->is_initiator = is_initiator;
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return (&(this->public));
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}
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