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372 lines
12 KiB
372 lines
12 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 "p25/lc/tsbk/TSBKFactory.h"
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#include "edac/CRC.h"
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#include "Log.h"
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#include "Utils.h"
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using namespace p25::lc::tsbk;
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using namespace p25::lc;
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using namespace p25;
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#include <cassert>
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// ---------------------------------------------------------------------------
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// Static Class Members
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// ---------------------------------------------------------------------------
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#if FORCE_TSBK_CRC_WARN
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bool TSBKFactory::m_warnCRC = true;
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#else
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bool TSBKFactory::m_warnCRC = false;
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#endif
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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 TSBKFactory class.
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/// </summary>
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TSBKFactory::TSBKFactory()
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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 TSBKFactory class.
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/// </summary>
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TSBKFactory::~TSBKFactory()
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{
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/* stub */
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}
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/// <summary>
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/// Create an instance of a TSBK.
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/// </summary>
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/// <param name="data"></param>
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/// <param name="rawTSBK"></param>
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/// <returns>True, if TSBK was decoded, otherwise false.</returns>
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std::unique_ptr<TSBK> TSBKFactory::createTSBK(const uint8_t* data, bool rawTSBK)
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{
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assert(data != NULL);
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uint8_t tsbk[P25_TSBK_LENGTH_BYTES + 1U];
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::memset(tsbk, 0x00U, P25_TSBK_LENGTH_BYTES);
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edac::Trellis trellis = edac::Trellis();
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if (rawTSBK) {
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::memcpy(tsbk, data, P25_TSBK_LENGTH_BYTES);
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bool ret = edac::CRC::checkCCITT162(tsbk, P25_TSBK_LENGTH_BYTES);
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if (!ret) {
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if (m_warnCRC) {
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LogWarning(LOG_P25, "TSBK::decode(), failed CRC CCITT-162 check");
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ret = true; // ignore CRC error
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}
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else {
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LogError(LOG_P25, "TSBK::decode(), failed CRC CCITT-162 check");
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}
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}
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}
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else {
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// deinterleave
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uint8_t raw[P25_TSBK_FEC_LENGTH_BYTES];
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P25Utils::decode(data, raw, 114U, 318U);
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// decode 1/2 rate Trellis & check CRC-CCITT 16
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try {
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bool ret = trellis.decode12(raw, tsbk);
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if (!ret) {
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LogError(LOG_P25, "TSBK::decode(), failed to decode Trellis 1/2 rate coding");
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}
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if (ret) {
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ret = edac::CRC::checkCCITT162(tsbk, P25_TSBK_LENGTH_BYTES);
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if (!ret) {
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if (m_warnCRC) {
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LogWarning(LOG_P25, "TSBK::decode(), failed CRC CCITT-162 check");
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ret = true; // ignore CRC error
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}
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else {
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LogError(LOG_P25, "TSBK::decode(), failed CRC CCITT-162 check");
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}
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}
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}
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if (!ret)
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return NULL;
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}
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catch (...) {
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Utils::dump(2U, "P25, decoding excepted with input data", tsbk, P25_TSBK_LENGTH_BYTES);
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return NULL;
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}
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}
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uint8_t lco = tsbk[0U] & 0x3F; // LCO
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uint8_t mfId = tsbk[1U]; // Mfg Id.
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// Motorola P25 vendor opcodes
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if (mfId == P25_MFG_MOT) {
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switch (lco) {
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case TSBK_IOSP_GRP_VCH:
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case TSBK_IOSP_UU_VCH:
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case TSBK_IOSP_UU_ANS:
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case TSBK_IOSP_TELE_INT_ANS:
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case TSBK_IOSP_STS_UPDT:
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case TSBK_IOSP_STS_Q:
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case TSBK_IOSP_MSG_UPDT:
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case TSBK_IOSP_CALL_ALRT:
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case TSBK_IOSP_ACK_RSP:
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case TSBK_IOSP_GRP_AFF:
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case TSBK_IOSP_U_REG:
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case TSBK_ISP_CAN_SRV_REQ:
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case TSBK_ISP_GRP_AFF_Q_RSP:
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case TSBK_OSP_DENY_RSP:
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case TSBK_OSP_QUE_RSP:
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case TSBK_ISP_U_DEREG_REQ:
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case TSBK_OSP_U_DEREG_ACK:
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case TSBK_ISP_LOC_REG_REQ:
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mfId = P25_MFG_STANDARD;
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break;
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default:
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LogError(LOG_P25, "TSBK::decode(), unknown TSBK LCO value, mfId = $%02X, lco = $%02X", mfId, lco);
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break;
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}
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if (mfId == P25_MFG_MOT) {
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return NULL;
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}
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else {
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mfId = tsbk[1U];
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}
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}
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// internal P25 vendor opcodes
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if (mfId == P25_MFG_DVM) {
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switch (lco) {
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case LC_CALL_TERM:
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return decode(new OSP_DVM_LC_CALL_TERM(), data, rawTSBK);
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default:
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mfId = P25_MFG_STANDARD;
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break;
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}
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if (mfId == P25_MFG_DVM) {
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return NULL;
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}
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else {
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mfId = tsbk[1U];
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}
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}
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// standard P25 reference opcodes
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switch (lco) {
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case TSBK_IOSP_GRP_VCH:
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return decode(new IOSP_GRP_VCH(), data, rawTSBK);
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case TSBK_IOSP_UU_VCH:
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return decode(new IOSP_UU_VCH(), data, rawTSBK);
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case TSBK_IOSP_UU_ANS:
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return decode(new IOSP_UU_ANS(), data, rawTSBK);
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case TSBK_ISP_SNDCP_CH_REQ:
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return decode(new ISP_SNDCP_CH_REQ(), data, rawTSBK);
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case TSBK_IOSP_STS_UPDT:
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return decode(new IOSP_STS_UPDT(), data, rawTSBK);
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case TSBK_IOSP_MSG_UPDT:
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return decode(new IOSP_MSG_UPDT(), data, rawTSBK);
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case TSBK_IOSP_RAD_MON:
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return decode(new IOSP_RAD_MON(), data, rawTSBK);
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case TSBK_IOSP_CALL_ALRT:
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return decode(new IOSP_CALL_ALRT(), data, rawTSBK);
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case TSBK_IOSP_ACK_RSP:
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return decode(new IOSP_ACK_RSP(), data, rawTSBK);
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case TSBK_ISP_EMERG_ALRM_REQ:
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return decode(new ISP_EMERG_ALRM_REQ(), data, rawTSBK);
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case TSBK_IOSP_EXT_FNCT:
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return decode(new IOSP_EXT_FNCT(), data, rawTSBK);
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case TSBK_IOSP_GRP_AFF:
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return decode(new IOSP_GRP_AFF(), data, rawTSBK);
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case TSBK_IOSP_U_REG:
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return decode(new IOSP_U_REG(), data, rawTSBK);
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case TSBK_ISP_CAN_SRV_REQ:
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return decode(new ISP_CAN_SRV_REQ(), data, rawTSBK);
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case TSBK_ISP_GRP_AFF_Q_RSP:
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return decode(new ISP_GRP_AFF_Q_RSP(), data, rawTSBK);
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case TSBK_OSP_QUE_RSP:
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return decode(new OSP_QUE_RSP(), data, rawTSBK);
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case TSBK_ISP_U_DEREG_REQ:
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return decode(new ISP_U_DEREG_REQ(), data, rawTSBK);
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case TSBK_OSP_U_DEREG_ACK:
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return decode(new OSP_U_DEREG_ACK(), data, rawTSBK);
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case TSBK_ISP_LOC_REG_REQ:
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return decode(new ISP_LOC_REG_REQ(), data, rawTSBK);
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case TSBK_ISP_AUTH_RESP:
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return decode(new ISP_AUTH_RESP(), data, rawTSBK);
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case TSBK_ISP_AUTH_FNE_RST:
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return decode(new ISP_AUTH_FNE_RST(), data, rawTSBK);
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case TSBK_ISP_AUTH_SU_DMD:
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return decode(new ISP_AUTH_SU_DMD(), data, rawTSBK);
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case TSBK_OSP_ADJ_STS_BCAST:
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return decode(new OSP_ADJ_STS_BCAST(), data, rawTSBK);
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default:
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LogError(LOG_P25, "TSBKFactory::create(), unknown TSBK LCO value, mfId = $%02X, lco = $%02X", mfId, lco);
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break;
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}
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return NULL;
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}
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/// <summary>
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/// Create an instance of a AMBT.
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/// </summary>
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/// <param name="dataHeader"></param>
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/// <param name="blocks"></param>
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/// <returns></returns>
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std::unique_ptr<AMBT> TSBKFactory::createAMBT(const data::DataHeader dataHeader, const data::DataBlock* blocks)
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{
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assert(blocks != NULL);
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if (dataHeader.getFormat() != PDU_FMT_AMBT) {
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LogError(LOG_P25, "TSBKFactory::createAMBT(), PDU is not a AMBT PDU");
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return NULL;
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}
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if (dataHeader.getBlocksToFollow() == 0U) {
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LogError(LOG_P25, "TSBKFactory::createAMBT(), PDU contains no data blocks");
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return NULL;
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}
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uint8_t lco = dataHeader.getAMBTOpcode(); // LCO
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uint8_t mfId = dataHeader.getMFId(); // Mfg Id.
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// Motorola P25 vendor opcodes
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if (mfId == P25_MFG_MOT) {
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switch (lco) {
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case TSBK_IOSP_GRP_VCH:
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case TSBK_IOSP_UU_VCH:
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case TSBK_IOSP_UU_ANS:
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case TSBK_IOSP_TELE_INT_ANS:
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case TSBK_IOSP_STS_UPDT:
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case TSBK_IOSP_STS_Q:
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case TSBK_IOSP_MSG_UPDT:
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case TSBK_IOSP_CALL_ALRT:
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case TSBK_IOSP_ACK_RSP:
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case TSBK_IOSP_GRP_AFF:
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case TSBK_IOSP_U_REG:
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case TSBK_ISP_CAN_SRV_REQ:
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case TSBK_ISP_GRP_AFF_Q_RSP:
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case TSBK_OSP_DENY_RSP:
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case TSBK_OSP_QUE_RSP:
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case TSBK_ISP_U_DEREG_REQ:
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case TSBK_OSP_U_DEREG_ACK:
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case TSBK_ISP_LOC_REG_REQ:
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mfId = P25_MFG_STANDARD;
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break;
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default:
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LogError(LOG_P25, "TSBKFactory::createAMBT(), unknown TSBK LCO value, mfId = $%02X, lco = $%02X", mfId, lco);
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break;
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}
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if (mfId == P25_MFG_MOT) {
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return NULL;
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}
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else {
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mfId = dataHeader.getMFId();
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}
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}
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// standard P25 reference opcodes
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switch (lco) {
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case TSBK_IOSP_STS_UPDT:
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return decode(new MBT_IOSP_STS_UPDT(), dataHeader, blocks);
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case TSBK_IOSP_MSG_UPDT:
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return decode(new MBT_IOSP_MSG_UPDT(), dataHeader, blocks);
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case TSBK_IOSP_CALL_ALRT:
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return decode(new MBT_IOSP_CALL_ALRT(), dataHeader, blocks);
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case TSBK_IOSP_ACK_RSP:
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return decode(new MBT_IOSP_ACK_RSP(), dataHeader, blocks);
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case TSBK_IOSP_GRP_AFF:
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return decode(new MBT_IOSP_GRP_AFF(), dataHeader, blocks);
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case TSBK_ISP_CAN_SRV_REQ:
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return decode(new MBT_ISP_CAN_SRV_REQ(), dataHeader, blocks);
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case TSBK_IOSP_EXT_FNCT:
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return decode(new MBT_IOSP_EXT_FNCT(), dataHeader, blocks);
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case TSBK_ISP_AUTH_RESP_M:
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return decode(new MBT_ISP_AUTH_RESP_M(), dataHeader, blocks);
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case TSBK_ISP_AUTH_SU_DMD:
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return decode(new MBT_ISP_AUTH_SU_DMD(), dataHeader, blocks);
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default:
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LogError(LOG_P25, "TSBKFactory::createAMBT(), unknown TSBK LCO value, mfId = $%02X, lco = $%02X", mfId, lco);
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break;
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}
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return NULL;
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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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///
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/// </summary>
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/// <param name="tsbk"></param>
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/// <param name="data"></param>
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/// <param name="rawTSBK"></param>
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/// <returns></returns>
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std::unique_ptr<TSBK> TSBKFactory::decode(TSBK* tsbk, const uint8_t* data, bool rawTSBK)
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{
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assert(tsbk != NULL);
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assert(data != NULL);
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if (!tsbk->decode(data, rawTSBK)) {
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return NULL;
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}
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return std::unique_ptr<TSBK>(tsbk);
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}
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/// <summary>
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///
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/// </summary>
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/// <param name="ambt"></param>
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/// <param name="dataHeader"></param>
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/// <param name="blocks"></param>
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/// <returns></returns>
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std::unique_ptr<AMBT> TSBKFactory::decode(AMBT* ambt, const data::DataHeader dataHeader, const data::DataBlock* blocks)
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{
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assert(ambt != NULL);
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assert(blocks != NULL);
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if (!ambt->decodeMBT(dataHeader, blocks)) {
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return NULL;
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}
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return std::unique_ptr<AMBT>(ambt);
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}
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