101 lines
2.2 KiB
C++
101 lines
2.2 KiB
C++
/*
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* Copyright (C) 2012 by Ian Wraith
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* Copyright (C) 2015,2016 by Jonathan Naylor G4KLX
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "DMRDataHeader.h"
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#include "DMRDefines.h"
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#include "BPTC19696.h"
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#include "Utils.h"
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#include "CRC.h"
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#include "Log.h"
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#include <cstdio>
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#include <cassert>
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CDMRDataHeader::CDMRDataHeader() :
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m_data(NULL),
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m_gi(false),
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m_srcId(0U),
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m_dstId(0U),
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m_blocks(0U)
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{
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m_data = new unsigned char[12U];
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}
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CDMRDataHeader::~CDMRDataHeader()
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{
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delete[] m_data;
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}
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bool CDMRDataHeader::put(const unsigned char* bytes)
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{
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assert(bytes != NULL);
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CBPTC19696 bptc;
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bptc.decode(bytes, m_data);
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m_data[10U] ^= DATA_HEADER_CRC_MASK[0U];
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m_data[11U] ^= DATA_HEADER_CRC_MASK[1U];
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bool valid = CCRC::checkCCITT162(m_data, 12U);
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if (!valid)
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return false;
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// Restore the checksum
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m_data[10U] ^= DATA_HEADER_CRC_MASK[0U];
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m_data[11U] ^= DATA_HEADER_CRC_MASK[1U];
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m_gi = (m_data[0U] & 0x80U) == 0x80U;
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m_dstId = m_data[2U] << 16 | m_data[3U] << 8 | m_data[4U];
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m_srcId = m_data[5U] << 16 | m_data[6U] << 8 | m_data[7U];
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m_blocks = m_data[8U] & 0x7FU;
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CUtils::dump("Data Header", m_data, 12U);
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return true;
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}
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void CDMRDataHeader::get(unsigned char* bytes) const
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{
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assert(bytes != NULL);
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CBPTC19696 bptc;
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bptc.encode(m_data, bytes);
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}
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bool CDMRDataHeader::getGI() const
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{
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return m_gi;
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}
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unsigned int CDMRDataHeader::getSrcId() const
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{
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return m_srcId;
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}
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unsigned int CDMRDataHeader::getDstId() const
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{
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return m_dstId;
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}
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unsigned int CDMRDataHeader::getBlocks() const
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{
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return m_blocks;
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}
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