147 lines
3.2 KiB
C++
147 lines
3.2 KiB
C++
/*
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* Copyright (C) 2020 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 "M17LICH.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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CM17LICH::CM17LICH() :
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m_lich(NULL),
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m_valid(false)
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{
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m_lich = new unsigned char[M17_LICH_LENGTH_BYTES];
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}
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CM17LICH::~CM17LICH()
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{
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delete[] m_lich;
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}
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void CM17LICH::getNetwork(unsigned char* data) const
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{
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assert(data != NULL);
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::memcpy(data, m_lich, M17_LICH_LENGTH_BYTES);
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}
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void CM17LICH::setNetwork(const unsigned char* data)
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{
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assert(data != NULL);
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::memcpy(m_lich, data, M17_LICH_LENGTH_BYTES);
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m_valid = true;
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}
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std::string CM17LICH::getSource() const
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{
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std::string callsign;
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CM17Utils::decodeCallsign(m_lich + 6U, callsign);
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return callsign;
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}
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void CM17LICH::setSource(const std::string& callsign)
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{
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CM17Utils::encodeCallsign(callsign, m_lich + 6U);
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}
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std::string CM17LICH::getDest() const
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{
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std::string callsign;
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CM17Utils::decodeCallsign(m_lich + 0U, callsign);
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return callsign;
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}
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void CM17LICH::setDest(const std::string& callsign)
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{
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CM17Utils::encodeCallsign(callsign, m_lich + 0U);
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}
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unsigned char CM17LICH::getDataType() const
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{
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return (m_lich[13U] >> 1) & 0x03U;
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}
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void CM17LICH::setDataType(unsigned char type)
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{
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m_lich[13U] &= 0xF9U;
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m_lich[13U] |= (type << 1) & 0x06U;
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}
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bool CM17LICH::isNONCENull() const
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{
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return ::memcmp(m_lich + 14U, M17_NULL_NONCE, M17_NONCE_LENGTH_BYTES) == 0;
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}
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void CM17LICH::reset()
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{
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::memset(m_lich, 0x00U, 30U);
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m_valid = false;
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}
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bool CM17LICH::isValid() const
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{
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return m_valid;
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}
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void CM17LICH::getLinkSetup(unsigned char* data) const
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{
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assert(data != NULL);
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::memcpy(data, m_lich, M17_LICH_LENGTH_BYTES);
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CM17CRC::encodeCRC(data, M17_LICH_LENGTH_BYTES);
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}
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void CM17LICH::setLinkSetup(const unsigned char* data)
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{
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assert(data != NULL);
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::memcpy(m_lich, data, M17_LICH_LENGTH_BYTES);
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m_valid = CM17CRC::checkCRC(m_lich, M17_LICH_LENGTH_BYTES);
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}
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void CM17LICH::getFragment(unsigned char* data, unsigned short fn) const
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{
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assert(data != NULL);
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CM17CRC::encodeCRC(m_lich, M17_LICH_LENGTH_BYTES);
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unsigned int n = (fn & 0x7FFFU) % 5U;
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::memcpy(data, m_lich + (n * M17_LICH_FRAGMENT_LENGTH_BYTES), M17_LICH_FRAGMENT_LENGTH_BYTES);
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}
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void CM17LICH::setFragment(const unsigned char* data, unsigned short fn)
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{
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assert(data != NULL);
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unsigned int n = (fn & 0x7FFFU) % 5U;
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::memcpy(m_lich + (n * M17_LICH_FRAGMENT_LENGTH_BYTES), data, M17_LICH_FRAGMENT_LENGTH_BYTES);
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m_valid = CM17CRC::checkCRC(m_lich, M17_LICH_LENGTH_BYTES);
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}
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