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/*
* Copyright (C) 2013 Andreas Steffen
* HSR 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 "pb_pdp_referral_msg.h"
#include <bio/bio_writer.h>
#include <bio/bio_reader.h>
#include <utils/debug.h>
ENUM(pb_tnc_pdp_identifier_type_names, PB_PDP_ID_FQDN, PB_PDP_ID_IPV6,
"PDP FQDN ID",
"PDP IPv4 ID",
"PDP IPv6 ID"
);
typedef struct private_pb_pdp_referral_msg_t private_pb_pdp_referral_msg_t;
/**
* PB-PDP-Referral message (see section 3.1.1.1 of
* TCG TNC PDP Discovery and Validation Specification 1.0
*
* 0 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
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Reserved | PDP Identifier Vendor ID |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | PDP Identifier Type |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | PDP Identifier (Variable Length) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*
* Section 3.1.1.2.1 FQDN Identifier
*
* 0 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
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Reserved | Protocol | Port Number |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | FQDN (Variable Length) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*
* Section 3.1.1.2.2 IPv4 Identifier
*
* 0 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
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Reserved | Protocol | Port Number |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | IPv4 Address |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*
* Section 3.1.1.2.3 IPv6 Identifier
*
* 0 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
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Reserved | Protocol | Port Number |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | IPv6 Address (octets 1-4) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | IPv6 Address (octets 5-8) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | IPv6 Address (octets 9-12) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | IPv6 Address (octets 13-16) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*
*/
# define PDP_REFERRAL_HEADER_SIZE 8
# define PDP_REFERRAL_ID_HEADER_SIZE 4
# define PDP_REFERRAL_RESERVED 0x00
# define PDP_REFERRAL_PROTOCOL 0x00
/**
* Private data of a pb_pdp_referral_msg_t object.
*
*/
struct private_pb_pdp_referral_msg_t {
/**
* Public pb_pdp_referral_msg_t interface.
*/
pb_pdp_referral_msg_t public;
/**
* PB-TNC message type
*/
pen_type_t type;
/**
* PDP Identifier Type
*/
pen_type_t identifier_type;
/**
* PDP Identifier Value
*/
chunk_t identifier;
/**
* PDP FQDN Identifier
*/
chunk_t fqdn;
/**
* PT protocol the PDP is using
*/
uint8_t protocol;
/**
* PT port the PDP is using
*/
uint16_t port;
/**
* Encoded message
*/
chunk_t encoding;
};
METHOD(pb_tnc_msg_t, get_type, pen_type_t,
private_pb_pdp_referral_msg_t *this)
{
return this->type;
}
METHOD(pb_tnc_msg_t, get_encoding, chunk_t,
private_pb_pdp_referral_msg_t *this)
{
return this->encoding;
}
METHOD(pb_tnc_msg_t, build, void,
private_pb_pdp_referral_msg_t *this)
{
bio_writer_t *writer;
if (this->encoding.ptr)
{
return;
}
writer = bio_writer_create(PDP_REFERRAL_HEADER_SIZE + this->identifier.len);
writer->write_uint8 (writer, PDP_REFERRAL_RESERVED);
writer->write_uint24(writer, this->identifier_type.vendor_id);
writer->write_uint32(writer, this->identifier_type.type);
writer->write_data (writer, this->identifier);
this->encoding = writer->get_buf(writer);
this->encoding = chunk_clone(this->encoding);
writer->destroy(writer);
}
METHOD(pb_tnc_msg_t, process, status_t,
private_pb_pdp_referral_msg_t *this, uint32_t *offset)
{
bio_reader_t *reader;
uint8_t reserved;
*offset = 0;
/* process message */
reader = bio_reader_create(this->encoding);
reader->read_uint8 (reader, &reserved);
reader->read_uint24(reader, &this->identifier_type.vendor_id);
reader->read_uint32(reader, &this->identifier_type.type);
reader->read_data (reader, reader->remaining(reader), &this->identifier);
this->identifier = chunk_clone(this->identifier);
reader->destroy(reader);
if (this->identifier_type.vendor_id == PEN_TCG &&
this->identifier_type.type == PB_PDP_ID_FQDN)
{
reader = bio_reader_create(this->identifier);
*offset += PDP_REFERRAL_HEADER_SIZE;
if (this->identifier.len <= PDP_REFERRAL_ID_HEADER_SIZE)
{
reader->destroy(reader);
return FAILED;
}
reader->read_uint8 (reader, &reserved);
reader->read_uint8 (reader, &this->protocol);
reader->read_uint16(reader, &this->port);
reader->read_data (reader, reader->remaining(reader), &this->fqdn);
this->fqdn = chunk_clone(this->fqdn);
reader->destroy(reader);
}
return SUCCESS;
}
METHOD(pb_tnc_msg_t, destroy, void,
private_pb_pdp_referral_msg_t *this)
{
free(this->encoding.ptr);
free(this->identifier.ptr);
free(this->fqdn.ptr);
free(this);
}
METHOD(pb_pdp_referral_msg_t, get_identifier_type, pen_type_t,
private_pb_pdp_referral_msg_t *this)
{
return this->identifier_type;
}
METHOD(pb_pdp_referral_msg_t, get_identifier, chunk_t,
private_pb_pdp_referral_msg_t *this)
{
return this->identifier;
}
METHOD(pb_pdp_referral_msg_t, get_fqdn, chunk_t,
private_pb_pdp_referral_msg_t *this, uint8_t *protocol, uint16_t *port)
{
if (protocol)
{
*protocol = this->protocol;
}
if (port)
{
*port = this->port;
}
return this->fqdn;
}
/**
* See header
*/
pb_tnc_msg_t* pb_pdp_referral_msg_create(pen_type_t identifier_type,
chunk_t identifier)
{
private_pb_pdp_referral_msg_t *this;
INIT(this,
.public = {
.pb_interface = {
.get_type = _get_type,
.get_encoding = _get_encoding,
.build = _build,
.process = _process,
.destroy = _destroy,
},
.get_identifier_type = _get_identifier_type,
.get_identifier = _get_identifier,
},
.type = { PEN_TCG, PB_TCG_MSG_PDP_REFERRAL },
.identifier_type = identifier_type,
.identifier = chunk_clone(identifier),
);
return &this->public.pb_interface;
}
/**
* See header
*/
pb_tnc_msg_t* pb_pdp_referral_msg_create_from_fqdn(chunk_t fqdn, uint16_t port)
{
pb_tnc_msg_t *msg;
bio_writer_t *writer;
pen_type_t type = { PEN_TCG, PB_PDP_ID_FQDN };
writer = bio_writer_create(PDP_REFERRAL_ID_HEADER_SIZE + fqdn.len);
writer->write_uint8 (writer, PDP_REFERRAL_RESERVED);
writer->write_uint8 (writer, PDP_REFERRAL_PROTOCOL);
writer->write_uint16(writer, port);
writer->write_data (writer, fqdn);
msg = pb_pdp_referral_msg_create(type, writer->get_buf(writer));
writer->destroy(writer);
return msg;
}
/**
* See header
*/
pb_tnc_msg_t *pb_pdp_referral_msg_create_from_data(chunk_t data)
{
private_pb_pdp_referral_msg_t *this;
INIT(this,
.public = {
.pb_interface = {
.get_type = _get_type,
.get_encoding = _get_encoding,
.build = _build,
.process = _process,
.destroy = _destroy,
},
.get_identifier_type = _get_identifier_type,
.get_identifier = _get_identifier,
.get_fqdn = _get_fqdn,
},
.type = { PEN_TCG, PB_TCG_MSG_PDP_REFERRAL },
.encoding = chunk_clone(data),
);
return &this->public.pb_interface;
}
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