310 lines
8.0 KiB
C
310 lines
8.0 KiB
C
/**
|
|
* @file id_payload.h
|
|
*
|
|
* @brief Interface of id_payload_t.
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2005 Jan Hutter, Martin Willi
|
|
* 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 "id_payload.h"
|
|
|
|
#include <encoding/payloads/encodings.h>
|
|
#include <utils/allocator.h>
|
|
|
|
/**
|
|
* String mappings for id_type_t.
|
|
*/
|
|
mapping_t id_type_m[] = {
|
|
{ID_IPV4_ADDR, "ID_IPV4_ADDR"},
|
|
{ID_FQDN, "ID_FQDN"},
|
|
{ID_RFC822_ADDR, "ID_RFC822_ADDR"},
|
|
{ID_IPV6_ADDR, "ID_IPV6_ADDR"},
|
|
{ID_DER_ASN1_DN, "ID_DER_ASN1_DN"},
|
|
{ID_DER_ASN1_GN, "ID_DER_ASN1_GN"},
|
|
{ID_KEY_ID, "ID_KEY_ID"},
|
|
{MAPPING_END, NULL}
|
|
};
|
|
|
|
|
|
typedef struct private_id_payload_t private_id_payload_t;
|
|
|
|
/**
|
|
* Private data of an id_payload_t object.
|
|
*
|
|
*/
|
|
struct private_id_payload_t {
|
|
/**
|
|
* Public id_payload_t interface.
|
|
*/
|
|
id_payload_t public;
|
|
|
|
/**
|
|
* TRUE if this ID payload is of type IDi, FALSE for IDr.
|
|
*/
|
|
bool is_initiator;
|
|
|
|
/**
|
|
* Next payload type.
|
|
*/
|
|
u_int8_t next_payload;
|
|
|
|
/**
|
|
* Critical flag.
|
|
*/
|
|
bool critical;
|
|
|
|
/**
|
|
* Length of this payload.
|
|
*/
|
|
u_int16_t payload_length;
|
|
|
|
/**
|
|
* Type of the ID Data.
|
|
*/
|
|
u_int8_t id_type;
|
|
|
|
/**
|
|
* The contained id data value.
|
|
*/
|
|
chunk_t id_data;
|
|
};
|
|
|
|
/**
|
|
* Encoding rules to parse or generate a ID payload
|
|
*
|
|
* The defined offsets are the positions in a object of type
|
|
* private_id_payload_t.
|
|
*
|
|
*/
|
|
encoding_rule_t id_payload_encodings[] = {
|
|
/* 1 Byte next payload type, stored in the field next_payload */
|
|
{ U_INT_8, offsetof(private_id_payload_t, next_payload) },
|
|
/* the critical bit */
|
|
{ FLAG, offsetof(private_id_payload_t, critical) },
|
|
/* 7 Bit reserved bits, nowhere stored */
|
|
{ RESERVED_BIT, 0 },
|
|
{ RESERVED_BIT, 0 },
|
|
{ RESERVED_BIT, 0 },
|
|
{ RESERVED_BIT, 0 },
|
|
{ RESERVED_BIT, 0 },
|
|
{ RESERVED_BIT, 0 },
|
|
{ RESERVED_BIT, 0 },
|
|
/* Length of the whole payload*/
|
|
{ PAYLOAD_LENGTH, offsetof(private_id_payload_t, payload_length) },
|
|
/* 1 Byte ID type*/
|
|
{ U_INT_8, offsetof(private_id_payload_t, id_type) },
|
|
/* 3 reserved bytes */
|
|
{ RESERVED_BYTE, 0 },
|
|
{ RESERVED_BYTE, 0 },
|
|
{ RESERVED_BYTE, 0 },
|
|
/* some id data bytes, length is defined in PAYLOAD_LENGTH */
|
|
{ ID_DATA, offsetof(private_id_payload_t, id_data) }
|
|
};
|
|
|
|
/*
|
|
1 2 3
|
|
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
|
|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
! Next Payload !C! RESERVED ! Payload Length !
|
|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
! ID Type ! RESERVED |
|
|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
! !
|
|
~ Identification Data ~
|
|
! !
|
|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
*/
|
|
|
|
/**
|
|
* Implementation of payload_t.verify.
|
|
*/
|
|
static status_t verify(private_id_payload_t *this)
|
|
{
|
|
if (this->critical)
|
|
{
|
|
/* critical bit is set! */
|
|
return FAILED;
|
|
}
|
|
if ((this->id_type == 0) ||
|
|
(this->id_type == 4) ||
|
|
((this->id_type >= 6) && (this->id_type <= 8)) ||
|
|
((this->id_type >= 12) && (this->id_type <= 200)))
|
|
{
|
|
/* reserved IDs */
|
|
return FAILED;
|
|
}
|
|
|
|
return SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* Implementation of id_payload_t.get_encoding_rules.
|
|
*/
|
|
static void get_encoding_rules(private_id_payload_t *this, encoding_rule_t **rules, size_t *rule_count)
|
|
{
|
|
*rules = id_payload_encodings;
|
|
*rule_count = sizeof(id_payload_encodings) / sizeof(encoding_rule_t);
|
|
}
|
|
|
|
/**
|
|
* Implementation of payload_t.get_type.
|
|
*/
|
|
static payload_type_t get_payload_type(private_id_payload_t *this)
|
|
{
|
|
if (this->is_initiator)
|
|
{
|
|
return ID_INITIATOR;
|
|
}
|
|
else
|
|
{
|
|
return ID_RESPONDER;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Implementation of payload_t.get_next_type.
|
|
*/
|
|
static payload_type_t get_next_type(private_id_payload_t *this)
|
|
{
|
|
return (this->next_payload);
|
|
}
|
|
|
|
/**
|
|
* Implementation of payload_t.set_next_type.
|
|
*/
|
|
static void set_next_type(private_id_payload_t *this,payload_type_t type)
|
|
{
|
|
this->next_payload = type;
|
|
}
|
|
|
|
/**
|
|
* Implementation of payload_t.get_length.
|
|
*/
|
|
static size_t get_length(private_id_payload_t *this)
|
|
{
|
|
return this->payload_length;
|
|
}
|
|
|
|
/**
|
|
* Implementation of id_payload_t.set_type.
|
|
*/
|
|
static void set_id_type (private_id_payload_t *this, id_type_t type)
|
|
{
|
|
this->id_type = type;
|
|
}
|
|
|
|
/**
|
|
* Implementation of id_payload_t.get_id_type.
|
|
*/
|
|
static id_type_t get_id_type (private_id_payload_t *this)
|
|
{
|
|
return (this->id_type);
|
|
}
|
|
|
|
/**
|
|
* Implementation of id_payload_t.set_data.
|
|
*/
|
|
static void set_data (private_id_payload_t *this, chunk_t data)
|
|
{
|
|
if (this->id_data.ptr != NULL)
|
|
{
|
|
allocator_free_chunk(&(this->id_data));
|
|
}
|
|
this->id_data.ptr = allocator_clone_bytes(data.ptr,data.len);
|
|
this->id_data.len = data.len;
|
|
this->payload_length = ID_PAYLOAD_HEADER_LENGTH + this->id_data.len;
|
|
}
|
|
|
|
/**
|
|
* Implementation of id_payload_t.get_data.
|
|
*/
|
|
static chunk_t get_data (private_id_payload_t *this)
|
|
{
|
|
chunk_t cloned_data;
|
|
if (this->id_data.ptr == NULL)
|
|
{
|
|
return (this->id_data);
|
|
}
|
|
cloned_data.ptr = allocator_clone_bytes(this->id_data.ptr,this->id_data.len);
|
|
cloned_data.len = this->id_data.len;
|
|
return cloned_data;
|
|
}
|
|
|
|
/**
|
|
* Implementation of id_payload_t.get_initiator.
|
|
*/
|
|
static bool get_initiator (private_id_payload_t *this)
|
|
{
|
|
return (this->is_initiator);
|
|
}
|
|
|
|
/**
|
|
* Implementation of id_payload_t.set_initiator.
|
|
*/
|
|
static void set_initiator (private_id_payload_t *this,bool is_initiator)
|
|
{
|
|
this->is_initiator = is_initiator;
|
|
}
|
|
|
|
/**
|
|
* Implementation of payload_t.destroy and id_payload_t.destroy.
|
|
*/
|
|
static void destroy(private_id_payload_t *this)
|
|
{
|
|
if (this->id_data.ptr != NULL)
|
|
{
|
|
allocator_free_chunk(&(this->id_data));
|
|
}
|
|
|
|
allocator_free(this);
|
|
}
|
|
|
|
/*
|
|
* Described in header
|
|
*/
|
|
id_payload_t *id_payload_create(bool is_initiator)
|
|
{
|
|
private_id_payload_t *this = allocator_alloc_thing(private_id_payload_t);
|
|
|
|
/* interface functions */
|
|
this->public.payload_interface.verify = (status_t (*) (payload_t *))verify;
|
|
this->public.payload_interface.get_encoding_rules = (void (*) (payload_t *, encoding_rule_t **, size_t *) ) get_encoding_rules;
|
|
this->public.payload_interface.get_length = (size_t (*) (payload_t *)) get_length;
|
|
this->public.payload_interface.get_next_type = (payload_type_t (*) (payload_t *)) get_next_type;
|
|
this->public.payload_interface.set_next_type = (void (*) (payload_t *,payload_type_t)) set_next_type;
|
|
this->public.payload_interface.get_type = (payload_type_t (*) (payload_t *)) get_payload_type;
|
|
this->public.payload_interface.destroy = (void (*) (payload_t *))destroy;
|
|
|
|
/* public functions */
|
|
this->public.destroy = (void (*) (id_payload_t *)) destroy;
|
|
this->public.set_id_type = (void (*) (id_payload_t *,id_type_t)) set_id_type;
|
|
this->public.get_id_type = (id_type_t (*) (id_payload_t *)) get_id_type;
|
|
this->public.set_data = (void (*) (id_payload_t *,chunk_t)) set_data;
|
|
this->public.get_data = (chunk_t (*) (id_payload_t *)) get_data;
|
|
this->public.get_initiator = (bool (*) (id_payload_t *)) get_initiator;
|
|
this->public.set_initiator = (void (*) (id_payload_t *,bool)) set_initiator;
|
|
|
|
/* private variables */
|
|
this->critical = FALSE;
|
|
this->next_payload = NO_PAYLOAD;
|
|
this->payload_length =ID_PAYLOAD_HEADER_LENGTH;
|
|
this->id_data = CHUNK_INITIALIZER;
|
|
this->is_initiator = is_initiator;
|
|
|
|
return (&(this->public));
|
|
}
|