193 lines
4.1 KiB
C++
193 lines
4.1 KiB
C++
/*
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* Copyright (C) 2020,2021 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 "M17LSF.h"
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#include "M17Utils.h"
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#include "M17Defines.h"
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#include "M17CRC.h"
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#include <cassert>
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#include <cstring>
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CM17LSF::CM17LSF() :
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m_lsf(NULL),
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m_valid(false)
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{
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m_lsf = new unsigned char[M17_LSF_LENGTH_BYTES];
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}
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CM17LSF::~CM17LSF()
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{
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delete[] m_lsf;
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}
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void CM17LSF::getNetwork(unsigned char* data) const
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{
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assert(data != NULL);
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::memcpy(data, m_lsf, M17_LSF_LENGTH_BYTES);
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}
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void CM17LSF::setNetwork(const unsigned char* data)
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{
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assert(data != NULL);
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::memcpy(m_lsf, data, M17_LSF_LENGTH_BYTES);
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m_valid = true;
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}
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std::string CM17LSF::getSource() const
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{
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if (m_lsf[6U] == 0xFFU && m_lsf[7U] == 0xFFU && m_lsf[8U] == 0xFFU &&
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m_lsf[9U] == 0xFFU && m_lsf[10U] == 0xFFU && m_lsf[11U] == 0xFFU)
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return "******";
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std::string callsign;
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CM17Utils::decodeCallsign(m_lsf + 6U, callsign);
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return callsign;
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}
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void CM17LSF::setSource(const std::string& callsign)
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{
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CM17Utils::encodeCallsign(callsign, m_lsf + 6U);
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}
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std::string CM17LSF::getDest() const
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{
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if (m_lsf[0U] == 0xFFU && m_lsf[1U] == 0xFFU && m_lsf[2U] == 0xFFU &&
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m_lsf[3U] == 0xFFU && m_lsf[4U] == 0xFFU && m_lsf[5U] == 0xFFU)
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return "******";
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std::string callsign;
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CM17Utils::decodeCallsign(m_lsf + 0U, callsign);
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return callsign;
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}
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void CM17LSF::setDest(const std::string& callsign)
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{
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CM17Utils::encodeCallsign(callsign, m_lsf + 0U);
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}
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unsigned char CM17LSF::getPacketStream() const
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{
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return m_lsf[13U] & 0x01U;
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}
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void CM17LSF::setPacketStream(unsigned char ps)
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{
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m_lsf[13U] &= 0xF7U;
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m_lsf[13U] |= ps & 0x01U;
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}
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unsigned char CM17LSF::getDataType() const
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{
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return (m_lsf[13U] >> 1) & 0x03U;
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}
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void CM17LSF::setDataType(unsigned char type)
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{
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m_lsf[13U] &= 0xF9U;
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m_lsf[13U] |= (type << 1) & 0x06U;
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}
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unsigned char CM17LSF::getEncryptionType() const
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{
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return (m_lsf[13U] >> 3) & 0x03U;
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}
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void CM17LSF::setEncryptionType(unsigned char type)
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{
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m_lsf[13U] &= 0xE7U;
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m_lsf[13U] |= (type << 3) & 0x18U;
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}
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unsigned char CM17LSF::getEncryptionSubType() const
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{
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return (m_lsf[13U] >> 5) & 0x03U;
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}
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void CM17LSF::setEncryptionSubType(unsigned char type)
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{
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m_lsf[13U] &= 0x9FU;
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m_lsf[13U] |= (type << 5) & 0x60U;
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}
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unsigned char CM17LSF::getCAN() const
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{
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return ((m_lsf[12U] << 1) & 0x0EU) | ((m_lsf[13U] >> 7) & 0x01U);
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}
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void CM17LSF::setCAN(unsigned char can)
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{
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m_lsf[13U] &= 0x7FU;
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m_lsf[13U] |= (can << 7) & 0x80U;
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m_lsf[12U] &= 0xF8U;
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m_lsf[12U] |= (can >> 1) & 0x07U;
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}
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void CM17LSF::reset()
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{
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::memset(m_lsf, 0x00U, 30U);
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m_valid = false;
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}
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bool CM17LSF::isValid() const
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{
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return m_valid;
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}
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void CM17LSF::getLinkSetup(unsigned char* data) const
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{
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assert(data != NULL);
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::memcpy(data, m_lsf, M17_LSF_LENGTH_BYTES);
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CM17CRC::encodeCRC16(data, M17_LSF_LENGTH_BYTES);
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}
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void CM17LSF::setLinkSetup(const unsigned char* data)
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{
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assert(data != NULL);
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::memcpy(m_lsf, data, M17_LSF_LENGTH_BYTES);
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m_valid = CM17CRC::checkCRC16(m_lsf, M17_LSF_LENGTH_BYTES);
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}
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void CM17LSF::getFragment(unsigned char* data, unsigned int n) const
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{
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assert(data != NULL);
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CM17CRC::encodeCRC16(m_lsf, M17_LSF_LENGTH_BYTES);
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::memcpy(data, m_lsf + (n * M17_LSF_FRAGMENT_LENGTH_BYTES), M17_LSF_FRAGMENT_LENGTH_BYTES);
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}
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void CM17LSF::setFragment(const unsigned char* data, unsigned int n)
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{
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assert(data != NULL);
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::memcpy(m_lsf + (n * M17_LSF_FRAGMENT_LENGTH_BYTES), data, M17_LSF_FRAGMENT_LENGTH_BYTES);
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m_valid = CM17CRC::checkCRC16(m_lsf, M17_LSF_LENGTH_BYTES);
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}
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