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118 lines
4.0 KiB
118 lines
4.0 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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* Copyright (C) 2022 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/csbk/CSBK_RAND.h"
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#include "Log.h"
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#include "Utils.h"
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using namespace dmr::lc::csbk;
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using namespace dmr::lc;
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using namespace dmr;
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#include <cassert>
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#include <cmath>
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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 CSBK_RAND class.
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/// </summary>
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CSBK_RAND::CSBK_RAND() : CSBK(),
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m_serviceOptions(0U),
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m_serviceExtra(0U),
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m_serviceKind(0U)
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{
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m_CSBKO = CSBKO_RAND;
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}
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/// <summary>
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/// Decode a control signalling block.
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/// </summary>
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/// <param name="data"></param>
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/// <returns>True, if CSBK was decoded, otherwise false.</returns>
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bool CSBK_RAND::decode(const uint8_t* data)
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{
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assert(data != NULL);
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uint8_t csbk[DMR_CSBK_LENGTH_BYTES];
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::memset(csbk, 0x00U, DMR_CSBK_LENGTH_BYTES);
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bool ret = CSBK::decode(data, csbk);
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if (!ret)
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return false;
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ulong64_t csbkValue = CSBK::toValue(csbk);
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m_serviceOptions = (uint8_t)((csbkValue >> 57U) & 0x7FU); // Service Options
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m_proxy = (((csbkValue >> 56U) & 0xFF) & 0x01U) == 0x01U; // Proxy Flag
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m_serviceExtra = (uint8_t)((csbkValue >> 52U) & 0x0FU); // Service Extras (content dependant on service)
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m_serviceKind = (uint8_t)((csbkValue >> 48U) & 0x0FU); // Service Kind
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m_dstId = (uint32_t)((csbkValue >> 24) & 0xFFFFFFU); // Target Radio Address
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m_srcId = (uint32_t)(csbkValue & 0xFFFFFFU); // Source Radio Address
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return true;
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}
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/// <summary>
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/// Encode a control signalling block.
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/// </summary>
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/// <param name="data"></param>
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void CSBK_RAND::encode(uint8_t* data)
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{
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assert(data != NULL);
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ulong64_t csbkValue = 0U;
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csbkValue = m_serviceOptions & 0x7FU; // Service Options
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csbkValue = (csbkValue << 1) + (m_proxy ? 0x01U : 0x00); // Proxy Flag
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csbkValue = (csbkValue << 4) + (m_serviceExtra & 0x0FU); // Service Extras
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csbkValue = (csbkValue << 4) + (m_serviceKind & 0x0FU); // Service Kind
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csbkValue = (csbkValue << 24) + m_dstId; // Target Radio Address
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csbkValue = (csbkValue << 24) + m_srcId; // Source Radio Address
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std::unique_ptr<uint8_t[]> csbk = CSBK::fromValue(csbkValue);
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CSBK::encode(data, csbk.get());
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}
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// ---------------------------------------------------------------------------
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// Private Class Members
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// ---------------------------------------------------------------------------
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/// <summary>
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/// Internal helper to copy the the class.
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/// </summary>
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/// <param name="data"></param>
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void CSBK_RAND::copy(const CSBK_RAND& data)
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{
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CSBK::copy(data);
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m_serviceOptions = data.m_serviceOptions;
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m_serviceExtra = data.m_serviceExtra;
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m_serviceKind = data.m_serviceKind;
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}
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