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232 lines
7.1 KiB
232 lines
7.1 KiB
/**
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* Digital Voice Modem - Host Software
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* GPLv2 Open Source. Use is subject to license terms.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* @package DVM / Host Software
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*
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*/
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//
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// Based on code from the MMDVMHost project. (https://github.com/g4klx/MMDVMHost)
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// Licensed under the GPLv2 License (https://opensource.org/licenses/GPL-2.0)
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//
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/*
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* Copyright (C) 2015,2016 by Jonathan Naylor G4KLX
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* Copyright (C) 2020-2021 by Bryan Biedenkapp N2PLL
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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 "Defines.h"
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#include "dmr/lc/LC.h"
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#include "Utils.h"
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using namespace dmr::lc;
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using namespace dmr;
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#include <cstdio>
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#include <cassert>
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// ---------------------------------------------------------------------------
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// Public Class Members
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// ---------------------------------------------------------------------------
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/// <summary>
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/// Initializes a new instance of the LC class.
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/// </summary>
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/// <param name="flco">Full-link Control Opcode.</param>
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/// <param name="srcId">Source ID.</param>
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/// <param name="dstId">Destination ID.</param>
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LC::LC(uint8_t flco, uint32_t srcId, uint32_t dstId) :
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m_PF(false),
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m_FLCO(flco),
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m_FID(FID_ETSI),
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m_srcId(srcId),
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m_dstId(dstId),
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m_emergency(false),
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m_encrypted(false),
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m_broadcast(false),
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m_ovcm(false),
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m_priority(CALL_PRIORITY_2),
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m_R(false)
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{
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/* stub */
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}
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/// <summary>
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/// Initializes a new instance of the LC class.
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/// </summary>
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/// <param name="data"></param>
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LC::LC(const uint8_t* data) :
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m_PF(false),
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m_FLCO(FLCO_GROUP),
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m_FID(FID_ETSI),
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m_srcId(0U),
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m_dstId(0U),
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m_emergency(false),
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m_encrypted(false),
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m_broadcast(false),
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m_ovcm(false),
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m_priority(CALL_PRIORITY_2),
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m_R(false)
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{
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assert(data != NULL);
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m_PF = (data[0U] & 0x80U) == 0x80U;
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m_R = (data[0U] & 0x40U) == 0x40U;
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m_FLCO = data[0U] & 0x3FU;
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m_FID = data[1U];
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m_emergency = (data[2U] & 0x80U) == 0x80U; // Emergency Flag
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m_encrypted = (data[2U] & 0x40U) == 0x40U; // Encryption Flag
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m_broadcast = (data[2U] & 0x08U) == 0x08U; // Broadcast Flag
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m_ovcm = (data[2U] & 0x04U) == 0x04U; // OVCM Flag
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m_priority = (data[2U] & 0x03U); // Priority
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m_dstId = data[3U] << 16 | data[4U] << 8 | data[5U]; // Destination Address
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m_srcId = data[6U] << 16 | data[7U] << 8 | data[8U]; // Source Address
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}
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/// <summary>
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/// Initializes a new instance of the LC class.
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/// </summary>
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/// <param name="bits"></param>
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LC::LC(const bool* bits) :
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m_PF(false),
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m_FLCO(FLCO_GROUP),
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m_FID(FID_ETSI),
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m_srcId(0U),
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m_dstId(0U),
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m_emergency(false),
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m_encrypted(false),
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m_broadcast(false),
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m_ovcm(false),
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m_priority(CALL_PRIORITY_2),
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m_R(false)
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{
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assert(bits != NULL);
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m_PF = bits[0U];
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m_R = bits[1U];
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uint8_t temp1, temp2, temp3;
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Utils::bitsToByteBE(bits + 0U, temp1);
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m_FLCO = temp1 & 0x3FU;
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Utils::bitsToByteBE(bits + 8U, temp2);
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m_FID = temp2;
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Utils::bitsToByteBE(bits + 16U, temp3);
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m_emergency = (temp3 & 0x80U) == 0x80U; // Emergency Flag
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m_encrypted = (temp3 & 0x40U) == 0x40U; // Encryption Flag
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m_broadcast = (temp3 & 0x08U) == 0x08U; // Broadcast Flag
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m_ovcm = (temp3 & 0x04U) == 0x04U; // OVCM Flag
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m_priority = (temp3 & 0x03U); // Priority
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uint8_t d1, d2, d3;
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Utils::bitsToByteBE(bits + 24U, d1);
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Utils::bitsToByteBE(bits + 32U, d2);
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Utils::bitsToByteBE(bits + 40U, d3);
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uint8_t s1, s2, s3;
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Utils::bitsToByteBE(bits + 48U, s1);
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Utils::bitsToByteBE(bits + 56U, s2);
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Utils::bitsToByteBE(bits + 64U, s3);
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m_srcId = s1 << 16 | s2 << 8 | s3; // Source Address
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m_dstId = d1 << 16 | d2 << 8 | d3; // Destination Address
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}
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/// <summary>
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/// Initializes a new instance of the LC class.
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/// </summary>
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LC::LC() :
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m_PF(false),
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m_FLCO(FLCO_GROUP),
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m_FID(FID_ETSI),
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m_srcId(0U),
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m_dstId(0U),
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m_emergency(false),
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m_encrypted(false),
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m_broadcast(false),
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m_ovcm(false),
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m_priority(CALL_PRIORITY_2),
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m_R(false)
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{
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/* stub */
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}
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/// <summary>
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/// Finalizes a instance of the LC class.
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/// </summary>
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LC::~LC()
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{
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/* stub */
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}
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/// <summary>
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///
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/// </summary>
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/// <param name="data"></param>
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void LC::getData(uint8_t* data) const
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{
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assert(data != NULL);
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data[0U] = (uint8_t)m_FLCO;
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if (m_PF)
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data[0U] |= 0x80U;
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if (m_R)
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data[0U] |= 0x40U;
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data[1U] = m_FID;
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data[2U] = (m_emergency ? 0x80U : 0x00U) + // Emergency Flag
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(m_encrypted ? 0x40U : 0x00U) + // Encrypted Flag
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(m_broadcast ? 0x08U : 0x00U) + // Broadcast Flag
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(m_ovcm ? 0x04U : 0x00U) + // OVCM Flag
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(m_priority & 0x03U); // Priority
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data[3U] = m_dstId >> 16; // Destination Address
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data[4U] = m_dstId >> 8; // ..
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data[5U] = m_dstId >> 0; // ..
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data[6U] = m_srcId >> 16; // Source Address
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data[7U] = m_srcId >> 8; // ..
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data[8U] = m_srcId >> 0; // ..
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}
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/// <summary>
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///
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/// </summary>
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/// <param name="bits"></param>
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void LC::getData(bool* bits) const
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{
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assert(bits != NULL);
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uint8_t bytes[9U];
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getData(bytes);
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Utils::byteToBitsBE(bytes[0U], bits + 0U);
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Utils::byteToBitsBE(bytes[1U], bits + 8U);
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Utils::byteToBitsBE(bytes[2U], bits + 16U);
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Utils::byteToBitsBE(bytes[3U], bits + 24U);
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Utils::byteToBitsBE(bytes[4U], bits + 32U);
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Utils::byteToBitsBE(bytes[5U], bits + 40U);
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Utils::byteToBitsBE(bytes[6U], bits + 48U);
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Utils::byteToBitsBE(bytes[7U], bits + 56U);
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Utils::byteToBitsBE(bytes[8U], bits + 64U);
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}
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