MMDVMHost-Private/DMRCSBK.cpp

144 lines
3.2 KiB
C++
Raw Normal View History

2016-01-14 18:45:04 +00:00
/*
* Copyright (C) 2015,2016 by Jonathan Naylor G4KLX
*
* 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.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
2016-02-15 18:45:57 +00:00
#include "DMRCSBK.h"
2016-01-14 18:45:04 +00:00
#include "BPTC19696.h"
#include "Utils.h"
#include "CRC.h"
2016-01-14 18:45:04 +00:00
#include <cstdio>
#include <cassert>
CDMRCSBK::CDMRCSBK() :
m_data(NULL),
2016-01-14 18:45:04 +00:00
m_CSBKO(CSBKO_NONE),
m_FID(0x00U),
m_GI(false),
2016-01-14 18:45:04 +00:00
m_bsId(0U),
m_srcId(0U),
m_dstId(0U)
{
m_data = new unsigned char[12U];
}
CDMRCSBK::~CDMRCSBK()
{
delete[] m_data;
}
bool CDMRCSBK::put(const unsigned char* bytes)
2016-01-14 18:45:04 +00:00
{
assert(bytes != NULL);
CBPTC19696 bptc;
bptc.decode(bytes, m_data);
2016-01-14 18:45:04 +00:00
m_data[10U] ^= CSBK_CRC_MASK[0U];
m_data[11U] ^= CSBK_CRC_MASK[1U];
2016-01-14 18:45:04 +00:00
bool valid = CCRC::checkCCITT162(m_data, 12U);
if (!valid)
return false;
2016-01-26 18:06:31 +00:00
// Restore the checksum
m_data[10U] ^= CSBK_CRC_MASK[0U];
m_data[11U] ^= CSBK_CRC_MASK[1U];
2016-01-14 18:45:04 +00:00
m_CSBKO = CSBKO(m_data[0U] & 0x3FU);
m_FID = m_data[1U];
2016-01-14 18:45:04 +00:00
switch (m_CSBKO) {
case CSBKO_BSDWNACT:
m_bsId = m_data[4U] << 16 | m_data[5U] << 8 | m_data[6U];
m_srcId = m_data[7U] << 16 | m_data[8U] << 8 | m_data[9U];
2016-05-03 12:55:23 +00:00
// CUtils::dump(1U, "Downlink Activate CSBK", m_data, 12U);
break;
case CSBKO_UUVREQ:
m_dstId = m_data[4U] << 16 | m_data[5U] << 8 | m_data[6U];
m_srcId = m_data[7U] << 16 | m_data[8U] << 8 | m_data[9U];
2016-05-03 12:55:23 +00:00
// CUtils::dump(1U, "Unit to Unit Service Request CSBK", m_data, 12U);
break;
case CSBKO_UUANSRSP:
m_dstId = m_data[4U] << 16 | m_data[5U] << 8 | m_data[6U];
m_srcId = m_data[7U] << 16 | m_data[8U] << 8 | m_data[9U];
2016-05-03 12:55:23 +00:00
// CUtils::dump(1U, "Unit to Unit Service Answer Response CSBK", m_data, 12U);
break;
case CSBKO_PRECCSBK:
m_GI = (m_data[2U] & 0x40U) == 0x40U;
m_dstId = m_data[4U] << 16 | m_data[5U] << 8 | m_data[6U];
m_srcId = m_data[7U] << 16 | m_data[8U] << 8 | m_data[9U];
2016-05-03 12:55:23 +00:00
// CUtils::dump(1U, "Preamble CSBK", m_data, 12U);
break;
case CSBKO_NACKRSP:
m_srcId = m_data[4U] << 16 | m_data[5U] << 8 | m_data[6U];
m_dstId = m_data[7U] << 16 | m_data[8U] << 8 | m_data[9U];
2016-05-03 12:55:23 +00:00
// CUtils::dump(1U, "Negative Acknowledge Response CSBK", m_data, 12U);
break;
default:
CUtils::dump("Unhandled CSBK type", m_data, 12U);
2016-11-04 08:25:48 +00:00
m_srcId = 0U;
m_dstId = 0U;
return true;
2016-01-14 18:45:04 +00:00
}
return true;
2016-01-14 18:45:04 +00:00
}
void CDMRCSBK::get(unsigned char* bytes) const
2016-01-14 18:45:04 +00:00
{
assert(bytes != NULL);
CBPTC19696 bptc;
bptc.encode(m_data, bytes);
2016-01-14 18:45:04 +00:00
}
2016-02-15 18:45:57 +00:00
CSBKO CDMRCSBK::getCSBKO() const
2016-01-14 18:45:04 +00:00
{
return m_CSBKO;
}
2016-02-15 18:45:57 +00:00
unsigned char CDMRCSBK::getFID() const
2016-01-14 18:45:04 +00:00
{
return m_FID;
}
bool CDMRCSBK::getGI() const
{
return m_GI;
}
2016-02-15 18:45:57 +00:00
unsigned int CDMRCSBK::getBSId() const
2016-01-14 18:45:04 +00:00
{
return m_bsId;
}
2016-02-15 18:45:57 +00:00
unsigned int CDMRCSBK::getSrcId() const
2016-01-14 18:45:04 +00:00
{
return m_srcId;
}
2016-02-15 18:45:57 +00:00
unsigned int CDMRCSBK::getDstId() const
{
return m_dstId;
}