2016-01-26 19:06:31 +01:00
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/*
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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 "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(const unsigned char* data) :
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m_bptc(),
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m_valid(false),
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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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assert(data != NULL);
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unsigned char header[12U];
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m_bptc.decode(data, header);
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header[10U] ^= DATA_HEADER_CRC_MASK[0U];
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header[11U] ^= DATA_HEADER_CRC_MASK[1U];
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2016-02-18 22:56:26 +01:00
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m_valid = CCRC::checkCCITT162(header, 12U);
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2016-01-26 19:06:31 +01:00
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m_gi = (header[0U] & 0x80U) == 0x80U;
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m_dstId = data[2U] << 16 | data[3U] << 8 | data[4U];
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m_srcId = data[5U] << 16 | data[6U] << 8 | data[7U];
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m_blocks = data[8U] & 0x7FU;
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}
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CDMRDataHeader::~CDMRDataHeader()
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{
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}
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bool CDMRDataHeader::isValid() const
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{
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return m_valid;
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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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