/*
* Copyright (C) 2011-2012 Sansar Choinyambuu
* Copyright (C) 2011-2014 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 "tcg_pts_attr_file_meas.h"
#include <pa_tnc/pa_tnc_msg.h>
#include <bio/bio_writer.h>
#include <bio/bio_reader.h>
#include <collections/linked_list.h>
#include <utils/debug.h>
typedef struct private_tcg_pts_attr_file_meas_t private_tcg_pts_attr_file_meas_t;
/**
* File Measurement
* see section 3.19.2 of PTS Protocol: Binding to TNC IF-M Specification
*
* 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
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Number of Files included |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Number of Files included |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Request ID | Measurement Length |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Measurement #1 (Variable Length) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Filename Length | Filename (Variable Length) ~
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* ~ Filename (Variable Length) ~
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Measurement #2 (Variable Length) |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Filename Length | Filename (Variable Length) ~
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* ~ Filename (Variable Length) ~
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* ...........................
*/
#define PTS_FILE_MEAS_SIZE 12
/**
* Private data of an tcg_pts_attr_file_meas_t object.
*/
struct private_tcg_pts_attr_file_meas_t {
/**
* Public members of tcg_pts_attr_file_meas_t
*/
tcg_pts_attr_file_meas_t public;
/**
* Vendor-specific attribute type
*/
pen_type_t type;
/**
* Length of attribute value
*/
size_t length;
/**
* Offset up to which attribute value has been processed
*/
size_t offset;
/**
* Current position of attribute value pointer
*/
chunk_t value;
/**
* Contains complete attribute or current segment
*/
chunk_t segment;
/**
* Noskip flag
*/
bool noskip_flag;
/**
* Request ID
*/
uint16_t request_id;
/**
* Measurement Length
*/
uint16_t meas_len;
/**
* Number of Files in attribute
*/
uint64_t count;
/**
* PTS File Measurements
*/
pts_file_meas_t *measurements;
/**
* Reference count
*/
refcount_t ref;
};
METHOD(pa_tnc_attr_t, get_type, pen_type_t,
private_tcg_pts_attr_file_meas_t *this)
{
return this->type;
}
METHOD(pa_tnc_attr_t, get_value, chunk_t,
private_tcg_pts_attr_file_meas_t *this)
{
return this->value;
}
METHOD(pa_tnc_attr_t, get_noskip_flag, bool,
private_tcg_pts_attr_file_meas_t *this)
{
return this->noskip_flag;
}
METHOD(pa_tnc_attr_t, set_noskip_flag,void,
private_tcg_pts_attr_file_meas_t *this, bool noskip)
{
this->noskip_flag = noskip;
}
METHOD(pa_tnc_attr_t, build, void,
private_tcg_pts_attr_file_meas_t *this)
{
bio_writer_t *writer;
enumerator_t *enumerator;
uint64_t count;
uint16_t request_id;
char *filename;
chunk_t measurement;
bool first = TRUE;
if (this->value.ptr)
{
return;
}
count = this->measurements->get_file_count(this->measurements);
request_id = this->measurements->get_request_id(this->measurements);
writer = bio_writer_create(PTS_FILE_MEAS_SIZE);
writer->write_uint64(writer, count);
writer->write_uint16(writer, request_id);
enumerator = this->measurements->create_enumerator(this->measurements);
while (enumerator->enumerate(enumerator, &filename, &measurement))
{
if (first)
{
writer->write_uint16(writer, measurement.len);
first = FALSE;
}
writer->write_data (writer, measurement);
writer->write_data16(writer, chunk_create(filename, strlen(filename)));
}
enumerator->destroy(enumerator);
if (first)
{
/* no attached measurements */
writer->write_uint16(writer, 0);
}
this->value = writer->extract_buf(writer);
this->segment = this->value;
this->length = this->value.len;
writer->destroy(writer);
}
METHOD(pa_tnc_attr_t, process, status_t,
private_tcg_pts_attr_file_meas_t *this, uint32_t *offset)
{
bio_reader_t *reader;
chunk_t measurement, filename;
status_t status = NEED_MORE;
char buf[BUF_LEN];
size_t len;
if (this->offset == 0)
{
if (this->length < PTS_FILE_MEAS_SIZE)
{
DBG1(DBG_TNC, "insufficient data for %N/%N", pen_names, PEN_TCG,
tcg_attr_names, this->type.type);
*offset = this->offset;
return FAILED;
}
if (this->value.len < PTS_FILE_MEAS_SIZE)
{
return NEED_MORE;
}
reader = bio_reader_create(this->value);
reader->read_uint64(reader, &this->count);
reader->read_uint16(reader, &this->request_id);
reader->read_uint16(reader, &this->meas_len);
this->offset = PTS_FILE_MEAS_SIZE;
this->value = reader->peek(reader);
reader->destroy(reader);
}
this->measurements = pts_file_meas_create(this->request_id);
reader = bio_reader_create(this->value);
while (this->count)
{
if (!reader->read_data(reader, this->meas_len, &measurement) ||
!reader->read_data16(reader, &filename))
{
goto end;
}
this->offset += this->value.len - reader->remaining(reader);
this->value = reader->peek(reader);
len = min(filename.len, BUF_LEN-1);
memcpy(buf, filename.ptr, len);
buf[len] = '\0';
this->measurements->add(this->measurements, buf, measurement);
this->count--;
}
status = SUCCESS;
if (this->length != this->offset)
{
DBG1(DBG_TNC, "inconsistent length for %N/%N", pen_names, PEN_TCG,
tcg_attr_names, this->type.type);
*offset = this->offset;
status = FAILED;
}
end:
reader->destroy(reader);
return status;
}
METHOD(pa_tnc_attr_t, add_segment, void,
private_tcg_pts_attr_file_meas_t *this, chunk_t segment)
{
this->value = chunk_cat("cc", this->value, segment);
chunk_free(&this->segment);
this->segment = this->value;
}
METHOD(pa_tnc_attr_t, get_ref, pa_tnc_attr_t*,
private_tcg_pts_attr_file_meas_t *this)
{
ref_get(&this->ref);
return &this->public.pa_tnc_attribute;
}
METHOD(pa_tnc_attr_t, destroy, void,
private_tcg_pts_attr_file_meas_t *this)
{
if (ref_put(&this->ref))
{
DESTROY_IF(this->measurements);
free(this->segment.ptr);
free(this);
}
}
METHOD(tcg_pts_attr_file_meas_t, get_measurements, pts_file_meas_t*,
private_tcg_pts_attr_file_meas_t *this)
{
return this->measurements;
}
/**
* Described in header.
*/
pa_tnc_attr_t *tcg_pts_attr_file_meas_create(pts_file_meas_t *measurements)
{
private_tcg_pts_attr_file_meas_t *this;
INIT(this,
.public = {
.pa_tnc_attribute = {
.get_type = _get_type,
.get_value = _get_value,
.get_noskip_flag = _get_noskip_flag,
.set_noskip_flag = _set_noskip_flag,
.build = _build,
.process = _process,
.add_segment = _add_segment,
.get_ref = _get_ref,
.destroy = _destroy,
},
.get_measurements = _get_measurements,
},
.type = { PEN_TCG, TCG_PTS_FILE_MEAS },
.request_id = measurements->get_request_id(measurements),
.count = measurements->get_file_count(measurements),
.measurements = measurements,
.ref = 1,
);
return &this->public.pa_tnc_attribute;
}
/**
* Described in header.
*/
pa_tnc_attr_t *tcg_pts_attr_file_meas_create_from_data(size_t length,
chunk_t data)
{
private_tcg_pts_attr_file_meas_t *this;
INIT(this,
.public = {
.pa_tnc_attribute = {
.get_type = _get_type,
.get_value = _get_value,
.get_noskip_flag = _get_noskip_flag,
.set_noskip_flag = _set_noskip_flag,
.build = _build,
.process = _process,
.add_segment = _add_segment,
.get_ref = _get_ref,
.destroy = _destroy,
},
.get_measurements = _get_measurements,
},
.type = { PEN_TCG, TCG_PTS_FILE_MEAS },
.length = length,
.segment = chunk_clone(data),
.ref = 1,
);
/* received either complete attribute value or first segment */
this->value = this->segment;
return &this->public.pa_tnc_attribute;
}
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