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MMDVMHost-Private/DMRSlot.cpp
Jonathan Naylor 52de9f3970 Fix spelling mistakes.
2016-05-03 13:58:34 +01:00

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/*
* Copyright (C) 2015,2016 Jonathan Naylor, G4KLX
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include "DMRSlotType.h"
#include "DMRShortLC.h"
#include "DMRFullLC.h"
#include "BPTC19696.h"
#include "DMRSlot.h"
#include "DMRCSBK.h"
#include "Utils.h"
#include "Sync.h"
#include "CRC.h"
#include "Log.h"
#include <cassert>
#include <ctime>
#include <algorithm>
unsigned int CDMRSlot::m_id = 0U;
unsigned int CDMRSlot::m_colorCode = 0U;
bool CDMRSlot::m_selfOnly = false;
std::vector<unsigned int> CDMRSlot::m_prefixes;
std::vector<unsigned int> CDMRSlot::m_blackList;
CModem* CDMRSlot::m_modem = NULL;
CDMRIPSC* CDMRSlot::m_network = NULL;
IDisplay* CDMRSlot::m_display = NULL;
bool CDMRSlot::m_duplex = true;
CDMRLookup* CDMRSlot::m_lookup = NULL;
unsigned char* CDMRSlot::m_idle = NULL;
FLCO CDMRSlot::m_flco1;
unsigned char CDMRSlot::m_id1 = 0U;
bool CDMRSlot::m_voice1 = true;
FLCO CDMRSlot::m_flco2;
unsigned char CDMRSlot::m_id2 = 0U;
bool CDMRSlot::m_voice2 = true;
// #define DUMP_DMR
CDMRSlot::CDMRSlot(unsigned int slotNo, unsigned int timeout) :
m_slotNo(slotNo),
m_queue(2000U, "DMR Slot"),
m_rfState(RS_RF_LISTENING),
m_netState(RS_NET_IDLE),
m_rfEmbeddedLC(),
m_netEmbeddedLC(),
m_rfLC(NULL),
m_netLC(NULL),
m_rfDataHeader(),
m_netDataHeader(),
m_rfSeqNo(0U),
m_netSeqNo(0U),
m_rfN(0U),
m_netN(0U),
m_networkWatchdog(1000U, 0U, 1500U),
m_rfTimeoutTimer(1000U, timeout),
m_netTimeoutTimer(1000U, timeout),
m_packetTimer(1000U, 0U, 300U),
m_interval(),
m_elapsed(),
m_rfFrames(0U),
m_netFrames(0U),
m_netLost(0U),
m_fec(),
m_rfBits(0U),
m_netBits(0U),
m_rfErrs(0U),
m_netErrs(0U),
m_lastFrame(NULL),
m_lastEMB(),
m_fp(NULL)
{
m_lastFrame = new unsigned char[DMR_FRAME_LENGTH_BYTES + 2U];
m_interval.start();
}
CDMRSlot::~CDMRSlot()
{
delete[] m_lastFrame;
}
void CDMRSlot::writeModem(unsigned char *data)
{
assert(data != NULL);
if (data[0U] == TAG_LOST && m_rfState == RS_RF_AUDIO) {
if (m_rfBits == 0U) m_rfBits = 1U;
LogMessage("DMR Slot %u, RF transmission lost, %.1f seconds, BER: %.1f%%", m_slotNo, float(m_rfFrames) / 16.667F, float(m_rfErrs * 100U) / float(m_rfBits));
writeEndRF(true);
return;
}
if (data[0U] == TAG_LOST && m_rfState == RS_RF_DATA) {
LogMessage("DMR Slot %u, RF transmission lost", m_slotNo);
writeEndRF();
return;
}
if (data[0U] == TAG_LOST) {
m_rfState = RS_RF_LISTENING;
return;
}
bool dataSync = (data[1U] & DMR_SYNC_DATA) == DMR_SYNC_DATA;
bool audioSync = (data[1U] & DMR_SYNC_AUDIO) == DMR_SYNC_AUDIO;
if (dataSync) {
CDMRSlotType slotType;
slotType.putData(data + 2U);
unsigned char dataType = slotType.getDataType();
if (dataType == DT_VOICE_LC_HEADER) {
if (m_rfState == RS_RF_AUDIO)
return;
CDMRFullLC fullLC;
CDMRLC* lc = fullLC.decode(data + 2U, DT_VOICE_LC_HEADER);
if (lc == NULL)
return;
unsigned int id = lc->getSrcId();
if (!validateId(id)) {
LogMessage("DMR Slot %u, invalid access atempt from %u", m_slotNo, id);
delete lc;
return;
}
m_rfLC = lc;
// Store the LC for the embedded LC
m_rfEmbeddedLC.setData(*m_rfLC);
// Regenerate the LC data
fullLC.encode(*m_rfLC, data + 2U, DT_VOICE_LC_HEADER);
// Regenerate the Slot Type
slotType.getData(data + 2U);
// Convert the Data Sync to be from the BS
CSync::addDMRDataSync(data + 2U);
data[0U] = TAG_DATA;
data[1U] = 0x00U;
m_rfTimeoutTimer.start();
m_rfFrames = 0U;
m_rfSeqNo = 0U;
m_rfBits = 1U;
m_rfErrs = 0U;
if (m_duplex) {
writeQueueRF(data);
writeQueueRF(data);
}
writeNetworkRF(data, DT_VOICE_LC_HEADER);
m_rfState = RS_RF_AUDIO;
std::string src = m_lookup->find(id);
std::string dst = m_lookup->find(m_rfLC->getDstId());
if (m_netState == RS_NET_IDLE) {
setShortLC(m_slotNo, m_rfLC->getDstId(), m_rfLC->getFLCO(), true);
m_display->writeDMR(m_slotNo, src, m_rfLC->getFLCO() == FLCO_GROUP, dst, "R");
}
LogMessage("DMR Slot %u, received RF voice header from %s to %s%s", m_slotNo, src.c_str(), m_rfLC->getFLCO() == FLCO_GROUP ? "TG " : "", dst.c_str());
} else if (dataType == DT_VOICE_PI_HEADER) {
if (m_rfState != RS_RF_AUDIO)
return;
// Regenerate the Slot Type
slotType.getData(data + 2U);
// Convert the Data Sync to be from the BS
CSync::addDMRDataSync(data + 2U);
// Regenerate the payload
CBPTC19696 bptc;
unsigned char payload[12U];
bptc.decode(data + 2U, payload);
bptc.encode(payload, data + 2U);
data[0U] = TAG_DATA;
data[1U] = 0x00U;
if (m_duplex)
writeQueueRF(data);
writeNetworkRF(data, DT_VOICE_PI_HEADER);
} else if (dataType == DT_TERMINATOR_WITH_LC) {
if (m_rfState != RS_RF_AUDIO)
return;
// Regenerate the LC data
CDMRFullLC fullLC;
fullLC.encode(*m_rfLC, data + 2U, DT_TERMINATOR_WITH_LC);
// Regenerate the Slot Type
slotType.getData(data + 2U);
// Set the Data Sync to be from the BS
CSync::addDMRDataSync(data + 2U);
data[0U] = TAG_EOT;
data[1U] = 0x00U;
writeNetworkRF(data, DT_TERMINATOR_WITH_LC);
writeNetworkRF(data, DT_TERMINATOR_WITH_LC);
// 480ms of terminator to space things out
if (m_duplex) {
for (unsigned int i = 0U; i < 8U; i++)
writeQueueRF(data);
}
if (m_rfBits == 0U) m_rfBits = 1U;
LogMessage("DMR Slot %u, received RF end of voice transmission, %.1f seconds, BER: %.1f%%", m_slotNo, float(m_rfFrames) / 16.667F, float(m_rfErrs * 100U) / float(m_rfBits));
writeEndRF();
} else if (dataType == DT_DATA_HEADER) {
if (m_rfState == RS_RF_DATA)
return;
CDMRDataHeader dataHeader;
bool valid = dataHeader.put(data + 2U);
if (!valid)
return;
bool gi = dataHeader.getGI();
unsigned int srcId = dataHeader.getSrcId();
unsigned int dstId = dataHeader.getDstId();
if (!validateId(srcId)) {
LogMessage("DMR Slot %u, invalid access atempt from %u", m_slotNo, srcId);
return;
}
m_rfFrames = dataHeader.getBlocks();
m_rfDataHeader = dataHeader;
m_rfSeqNo = 0U;
m_rfLC = new CDMRLC(gi ? FLCO_GROUP : FLCO_USER_USER, srcId, dstId);
// Regenerate the data header
dataHeader.get(data + 2U);
// Regenerate the Slot Type
slotType.getData(data + 2U);
// Convert the Data Sync to be from the BS
CSync::addDMRDataSync(data + 2U);
data[0U] = m_rfFrames == 0U ? TAG_EOT : TAG_DATA;
data[1U] = 0x00U;
if (m_duplex)
writeQueueRF(data);
writeNetworkRF(data, DT_DATA_HEADER);
m_rfState = RS_RF_DATA;
std::string src = m_lookup->find(srcId);
std::string dst = m_lookup->find(dstId);
if (m_netState == RS_NET_IDLE) {
setShortLC(m_slotNo, dstId, gi ? FLCO_GROUP : FLCO_USER_USER, false);
m_display->writeDMR(m_slotNo, src, gi, dst, "R");
}
LogMessage("DMR Slot %u, received RF data header from %s to %s%s, %u blocks", m_slotNo, src.c_str(), gi ? "TG ": "", dst.c_str(), m_rfFrames);
if (m_rfFrames == 0U)
endOfRFData();
} else if (dataType == DT_CSBK) {
CDMRCSBK csbk;
bool valid = csbk.put(data + 2U);
if (!valid)
return;
CSBKO csbko = csbk.getCSBKO();
if (csbko == CSBKO_BSDWNACT)
return;
bool gi = csbk.getGI();
unsigned int srcId = csbk.getSrcId();
unsigned int dstId = csbk.getDstId();
if (!validateId(srcId)) {
LogMessage("DMR Slot %u, invalid access atempt from %u", m_slotNo, srcId);
return;
}
// Regenerate the CSBK data
csbk.get(data + 2U);
// Regenerate the Slot Type
slotType.getData(data + 2U);
// Convert the Data Sync to be from the BS
CSync::addDMRDataSync(data + 2U);
m_rfSeqNo = 0U;
data[0U] = TAG_DATA;
data[1U] = 0x00U;
if (m_duplex)
writeQueueRF(data);
writeNetworkRF(data, DT_CSBK, gi ? FLCO_GROUP : FLCO_USER_USER, srcId, dstId);
std::string src = m_lookup->find(srcId);
std::string dst = m_lookup->find(dstId);
switch (csbko) {
case CSBKO_UUVREQ:
LogMessage("DMR Slot %u, received RF Unit to Unit Voice Service Request CSBK from %s to %s%s", m_slotNo, src.c_str(), gi ? "TG ": "", dst.c_str());
break;
case CSBKO_UUANSRSP:
LogMessage("DMR Slot %u, received RF Unit to Unit Voice Service Answer Response CSBK from %s to %s%s", m_slotNo, src.c_str(), gi ? "TG ": "", dst.c_str());
break;
case CSBKO_NACKRSP:
LogMessage("DMR Slot %u, received RF Negative Acknowledgment Response CSBK from %s to %s%s", m_slotNo, src.c_str(), gi ? "TG ": "", dst.c_str());
break;
case CSBKO_PRECCSBK:
LogMessage("DMR Slot %u, received RF Preamble CSBK from %s to %s%s", m_slotNo, src.c_str(), gi ? "TG ": "", dst.c_str());
break;
default:
LogWarning("DMR Slot %u, unhandled RF CSBK type - 0x%02X", m_slotNo, csbko);
break;
}
} else if (dataType == DT_RATE_12_DATA || dataType == DT_RATE_34_DATA || dataType == DT_RATE_1_DATA) {
if (m_rfState != RS_RF_DATA || m_rfFrames == 0U)
return;
// Regenerate the rate 1/2 payload
if (dataType == DT_RATE_12_DATA) {
CBPTC19696 bptc;
unsigned char payload[12U];
bptc.decode(data + 2U, payload);
bptc.encode(payload, data + 2U);
}
// Regenerate the Slot Type
slotType.getData(data + 2U);
// Convert the Data Sync to be from the BS
CSync::addDMRDataSync(data + 2U);
m_rfFrames--;
data[0U] = m_rfFrames == 0U ? TAG_EOT : TAG_DATA;
data[1U] = 0x00U;
if (m_duplex)
writeQueueRF(data);
writeNetworkRF(data, dataType);
if (m_rfFrames == 0U)
endOfRFData();
}
} else if (audioSync) {
if (m_rfState == RS_RF_AUDIO) {
// Convert the Audio Sync to be from the BS
CSync::addDMRAudioSync(data + 2U);
unsigned int errors = 0U;
unsigned char fid = m_rfLC->getFID();
if (fid == FID_ETSI || fid == FID_DMRA) {
errors = m_fec.regenerateDMR(data + 2U);
// LogDebug("DMR Slot %u, audio sequence no. 0, errs: %u/141", m_slotNo, errors);
m_rfErrs += errors;
}
m_rfBits += 141U;
m_rfFrames++;
data[0U] = TAG_DATA;
data[1U] = 0x00U;
if (m_duplex)
writeQueueRF(data);
writeNetworkRF(data, DT_VOICE_SYNC, errors);
} else if (m_rfState == RS_RF_LISTENING) {
m_rfState = RS_RF_LATE_ENTRY;
}
} else {
if (m_rfState == RS_RF_AUDIO) {
m_rfN = data[1U] & 0x0FU;
// Regenerate the embedded LC
unsigned char lcss = m_rfEmbeddedLC.getData(data + 2U, m_rfN);
CDMREMB emb;
emb.putData(data + 2U);
// Regenerate the EMB
emb.setColorCode(m_colorCode);
emb.setLCSS(lcss);
emb.getData(data + 2U);
unsigned int errors = 0U;
unsigned char fid = m_rfLC->getFID();
if (fid == FID_ETSI || fid == FID_DMRA) {
errors = m_fec.regenerateDMR(data + 2U);
// LogDebug("DMR Slot %u, audio sequence no. %u, errs: %u/141", m_slotNo, m_rfN, errors);
m_rfErrs += errors;
}
m_rfBits += 141U;
m_rfFrames++;
data[0U] = TAG_DATA;
data[1U] = 0x00U;
if (m_duplex)
writeQueueRF(data);
writeNetworkRF(data, DT_VOICE, errors);
} else if (m_rfState == RS_RF_LATE_ENTRY) {
CDMREMB emb;
emb.putData(data + 2U);
// If we haven't received an LC yet, then be strict on the color code
unsigned char colorCode = emb.getColorCode();
if (colorCode != m_colorCode)
return;
CDMRLC* lc = m_rfEmbeddedLC.addData(data + 2U, emb.getLCSS());
if (lc != NULL) {
unsigned int id = lc->getSrcId();
if (!validateId(id)) {
LogMessage("DMR Slot %u, invalid access atempt from %u", m_slotNo, id);
delete lc;
return;
}
m_rfLC = lc;
// Store the LC for the embedded LC
m_rfEmbeddedLC.setData(*m_rfLC);
// Create a dummy start frame to replace the received frame
unsigned char start[DMR_FRAME_LENGTH_BYTES + 2U];
CSync::addDMRDataSync(data + 2U);
CDMRFullLC fullLC;
fullLC.encode(*m_rfLC, start + 2U, DT_VOICE_LC_HEADER);
CDMRSlotType slotType;
slotType.setColorCode(m_colorCode);
slotType.setDataType(DT_VOICE_LC_HEADER);
slotType.getData(start + 2U);
start[0U] = TAG_DATA;
start[1U] = 0x00U;
m_rfTimeoutTimer.start();
m_rfFrames = 0U;
m_rfSeqNo = 0U;
m_rfBits = 1U;
m_rfErrs = 0U;
if (m_duplex) {
writeQueueRF(start);
writeQueueRF(start);
}
writeNetworkRF(start, DT_VOICE_LC_HEADER);
m_rfN = data[1U] & 0x0FU;
// Regenerate the embedded LC
unsigned char lcss = m_rfEmbeddedLC.getData(data + 2U, m_rfN);
// Regenerate the EMB
emb.setLCSS(lcss);
emb.getData(data + 2U);
// Send the original audio frame out
unsigned int errors = 0U;
unsigned char fid = m_rfLC->getFID();
if (fid == FID_ETSI || fid == FID_DMRA) {
errors = m_fec.regenerateDMR(data + 2U);
// LogDebug("DMR Slot %u, audio sequence no. %u, errs: %u/141", m_slotNo, m_rfN, errors);
m_rfErrs += errors;
}
m_rfBits += 141U;
m_rfFrames++;
data[0U] = TAG_DATA;
data[1U] = 0x00U;
if (m_duplex)
writeQueueRF(data);
writeNetworkRF(data, DT_VOICE, errors);
m_rfState = RS_RF_AUDIO;
std::string src = m_lookup->find(m_rfLC->getSrcId());
std::string dst = m_lookup->find(m_rfLC->getDstId());
if (m_netState == RS_NET_IDLE) {
setShortLC(m_slotNo, m_rfLC->getDstId(), m_rfLC->getFLCO(), true);
m_display->writeDMR(m_slotNo, src, m_rfLC->getFLCO() == FLCO_GROUP, dst, "R");
}
LogMessage("DMR Slot %u, received RF late entry from %s to %s%s", m_slotNo, src.c_str(), m_rfLC->getFLCO() == FLCO_GROUP ? "TG " : "", dst.c_str());
}
}
}
}
unsigned int CDMRSlot::readModem(unsigned char* data)
{
assert(data != NULL);
if (m_queue.isEmpty())
return 0U;
unsigned char len = 0U;
m_queue.getData(&len, 1U);
m_queue.getData(data, len);
return len;
}
void CDMRSlot::endOfRFData()
{
LogMessage("DMR Slot %u, ended RF data transmission", m_slotNo);
if (m_duplex) {
unsigned char bytes[DMR_FRAME_LENGTH_BYTES + 2U];
CSync::addDMRDataSync(bytes + 2U);
CDMRSlotType slotType;
slotType.setDataType(DT_TERMINATOR_WITH_LC);
slotType.setColorCode(m_colorCode);
slotType.getData(bytes + 2U);
m_rfDataHeader.getTerminator(bytes + 2U);
bytes[0U] = TAG_DATA;
bytes[1U] = 0x00U;
for (unsigned int i = 0U; i < 5U; i++)
writeQueueRF(bytes);
}
writeEndRF();
}
void CDMRSlot::writeEndRF(bool writeEnd)
{
m_rfState = RS_RF_LISTENING;
if (m_netState == RS_NET_IDLE) {
setShortLC(m_slotNo, 0U);
m_display->clearDMR(m_slotNo);
}
m_rfTimeoutTimer.stop();
m_rfFrames = 0U;
m_rfErrs = 0U;
m_rfBits = 0U;
if (writeEnd) {
if (m_netState == RS_NET_IDLE && m_duplex) {
// Create a dummy start end frame
unsigned char data[DMR_FRAME_LENGTH_BYTES + 2U];
CSync::addDMRDataSync(data + 2U);
CDMRFullLC fullLC;
fullLC.encode(*m_rfLC, data + 2U, DT_TERMINATOR_WITH_LC);
CDMRSlotType slotType;
slotType.setColorCode(m_colorCode);
slotType.setDataType(DT_TERMINATOR_WITH_LC);
slotType.getData(data + 2U);
data[0U] = TAG_DATA;
data[1U] = 0x00U;
// 480ms of terminator to space things out
for (unsigned int i = 0U; i < 8U; i++)
writeQueueRF(data);
}
}
delete m_rfLC;
m_rfLC = NULL;
}
void CDMRSlot::endOfNetData()
{
LogMessage("DMR Slot %u, ended network data transmission", m_slotNo);
if (m_duplex) {
unsigned char bytes[DMR_FRAME_LENGTH_BYTES + 2U];
CSync::addDMRDataSync(bytes + 2U);
CDMRSlotType slotType;
slotType.setDataType(DT_TERMINATOR_WITH_LC);
slotType.setColorCode(m_colorCode);
slotType.getData(bytes + 2U);
m_netDataHeader.getTerminator(bytes + 2U);
bytes[0U] = TAG_DATA;
bytes[1U] = 0x00U;
for (unsigned int i = 0U; i < 5U; i++)
writeQueueNet(bytes);
}
writeEndNet();
}
void CDMRSlot::writeEndNet(bool writeEnd)
{
m_netState = RS_NET_IDLE;
setShortLC(m_slotNo, 0U);
m_display->clearDMR(m_slotNo);
m_networkWatchdog.stop();
m_netTimeoutTimer.stop();
m_packetTimer.stop();
m_netFrames = 0U;
m_netLost = 0U;
m_netErrs = 0U;
m_netBits = 0U;
if (writeEnd) {
// Create a dummy start end frame
unsigned char data[DMR_FRAME_LENGTH_BYTES + 2U];
CSync::addDMRDataSync(data + 2U);
CDMRFullLC fullLC;
fullLC.encode(*m_netLC, data + 2U, DT_TERMINATOR_WITH_LC);
CDMRSlotType slotType;
slotType.setColorCode(m_colorCode);
slotType.setDataType(DT_TERMINATOR_WITH_LC);
slotType.getData(data + 2U);
data[0U] = TAG_DATA;
data[1U] = 0x00U;
// 480ms of terminator to space things out
for (unsigned int i = 0U; i < 8U; i++)
writeQueueNet(data);
}
delete m_netLC;
m_netLC = NULL;
#if defined(DUMP_DMR)
closeFile();
#endif
}
void CDMRSlot::writeNetwork(const CDMRData& dmrData)
{
if (m_rfState != RS_RF_LISTENING && m_netState == RS_NET_IDLE)
return;
m_networkWatchdog.start();
unsigned char dataType = dmrData.getDataType();
unsigned char data[DMR_FRAME_LENGTH_BYTES + 2U];
dmrData.getData(data + 2U);
if (dataType == DT_VOICE_LC_HEADER) {
if (m_netState == RS_NET_AUDIO)
return;
CDMRFullLC fullLC;
m_netLC = fullLC.decode(data + 2U, DT_VOICE_LC_HEADER);
if (m_netLC == NULL) {
LogMessage("DMR Slot %u, bad LC received from the network", m_slotNo);
return;
}
// Store the LC for the embedded LC
m_netEmbeddedLC.setData(*m_netLC);
// Regenerate the LC data
fullLC.encode(*m_netLC, data + 2U, DT_VOICE_LC_HEADER);
// Regenerate the Slot Type
CDMRSlotType slotType;
slotType.setColorCode(m_colorCode);
slotType.setDataType(DT_VOICE_LC_HEADER);
slotType.getData(data + 2U);
// Convert the Data Sync to be from the BS
CSync::addDMRDataSync(data + 2U);
data[0U] = TAG_DATA;
data[1U] = 0x00U;
m_netTimeoutTimer.start();
m_netFrames = 0U;
m_netLost = 0U;
m_netBits = 1U;
m_netErrs = 0U;
// 300ms of idle to give breathing space for lost frames
for (unsigned int i = 0U; i < 5U; i++)
writeQueueNet(m_idle);
writeQueueNet(data);
writeQueueNet(data);
m_netState = RS_NET_AUDIO;
setShortLC(m_slotNo, m_netLC->getDstId(), m_netLC->getFLCO(), true);
std::string src = m_lookup->find(m_netLC->getSrcId());
std::string dst = m_lookup->find(m_netLC->getDstId());
m_display->writeDMR(m_slotNo, src, m_netLC->getFLCO() == FLCO_GROUP, dst, "N");
#if defined(DUMP_DMR)
openFile();
writeFile(data);
#endif
LogMessage("DMR Slot %u, received network voice header from %s to %s%s", m_slotNo, src.c_str(), m_netLC->getFLCO() == FLCO_GROUP ? "TG " : "", dst.c_str());
} else if (dataType == DT_VOICE_PI_HEADER) {
if (m_netState != RS_NET_AUDIO)
return;
// Regenerate the Slot Type
CDMRSlotType slotType;
slotType.setColorCode(m_colorCode);
slotType.setDataType(DT_VOICE_PI_HEADER);
slotType.getData(data + 2U);
// Convert the Data Sync to be from the BS
CSync::addDMRDataSync(data + 2U);
// Regenerate the payload
CBPTC19696 bptc;
unsigned char payload[12U];
bptc.decode(data + 2U, payload);
bptc.encode(payload, data + 2U);
data[0U] = TAG_DATA;
data[1U] = 0x00U;
writeQueueNet(data);
#if defined(DUMP_DMR)
writeFile(data);
#endif
} else if (dataType == DT_TERMINATOR_WITH_LC) {
if (m_netState != RS_NET_AUDIO)
return;
// Regenerate the LC data
CDMRFullLC fullLC;
fullLC.encode(*m_netLC, data + 2U, DT_TERMINATOR_WITH_LC);
// Regenerate the Slot Type
CDMRSlotType slotType;
slotType.setColorCode(m_colorCode);
slotType.setDataType(DT_TERMINATOR_WITH_LC);
slotType.getData(data + 2U);
// Convert the Data Sync to be from the BS
CSync::addDMRDataSync(data + 2U);
data[0U] = TAG_EOT;
data[1U] = 0x00U;
// 480ms of terminator to space things out
for (unsigned int i = 0U; i < 8U; i++)
writeQueueNet(data);
#if defined(DUMP_DMR)
writeFile(data);
closeFile();
#endif
// We've received the voice header and terminator haven't we?
m_netFrames += 2U;
if (m_netBits == 0U) m_netBits = 1U;
LogMessage("DMR Slot %u, received network end of voice transmission, %.1f seconds, %u%% packet loss, BER: %.1f%%", m_slotNo, float(m_netFrames) / 16.667F, (m_netLost * 100U) / m_netFrames, float(m_netErrs * 100U) / float(m_netBits));
writeEndNet();
} else if (dataType == DT_DATA_HEADER) {
if (m_netState == RS_NET_DATA)
return;
CDMRDataHeader dataHeader;
bool valid = dataHeader.put(data + 2U);
if (!valid) {
LogMessage("DMR Slot %u, unable to decode the network data header", m_slotNo);
return;
}
m_netFrames = dataHeader.getBlocks();
m_netDataHeader = dataHeader;
bool gi = dataHeader.getGI();
unsigned int srcId = dataHeader.getSrcId();
unsigned int dstId = dataHeader.getDstId();
m_netLC = new CDMRLC(gi ? FLCO_GROUP : FLCO_USER_USER, srcId, dstId);
// Regenerate the data header
dataHeader.get(data + 2U);
// Regenerate the Slot Type
CDMRSlotType slotType;
slotType.setColorCode(m_colorCode);
slotType.setDataType(DT_DATA_HEADER);
slotType.getData(data + 2U);
// Convert the Data Sync to be from the BS
CSync::addDMRDataSync(data + 2U);
data[0U] = m_netFrames == 0U ? TAG_EOT : TAG_DATA;
data[1U] = 0x00U;
// Put a small delay into starting transmission
writeQueueNet(m_idle);
writeQueueNet(m_idle);
writeQueueNet(data);
m_netState = RS_NET_DATA;
setShortLC(m_slotNo, dstId, gi ? FLCO_GROUP : FLCO_USER_USER, false);
std::string src = m_lookup->find(srcId);
std::string dst = m_lookup->find(dstId);
m_display->writeDMR(m_slotNo, src, gi, dst, "N");
LogMessage("DMR Slot %u, received network data header from %s to %s%s, %u blocks", m_slotNo, src.c_str(), gi ? "TG ": "", dst.c_str(), m_netFrames);
if (m_netFrames == 0U)
endOfNetData();
} else if (dataType == DT_VOICE_SYNC) {
if (m_netState == RS_NET_IDLE) {
m_netLC = new CDMRLC(dmrData.getFLCO(), dmrData.getSrcId(), dmrData.getDstId());
m_netTimeoutTimer.start();
// 540ms of idle to give breathing space for lost frames
for (unsigned int i = 0U; i < 9U; i++)
writeQueueNet(m_idle);
#if defined(DUMP_DMR)
openFile();
#endif
m_netFrames = 0U;
m_netLost = 0U;
m_netBits = 1U;
m_netErrs = 0U;
m_netState = RS_NET_AUDIO;
setShortLC(m_slotNo, m_netLC->getDstId(), m_netLC->getFLCO(), true);
std::string src = m_lookup->find(m_netLC->getSrcId());
std::string dst = m_lookup->find(m_netLC->getDstId());
m_display->writeDMR(m_slotNo, src, m_netLC->getFLCO() == FLCO_GROUP, dst, "N");
LogMessage("DMR Slot %u, received network late entry from %s to %s%s", m_slotNo, src.c_str(), m_netLC->getFLCO() == FLCO_GROUP ? "TG " : "", dst.c_str());
}
if (m_netState == RS_NET_AUDIO) {
unsigned char fid = m_netLC->getFID();
if (fid == FID_ETSI || fid == FID_DMRA) {
unsigned int errors = m_fec.regenerateDMR(data + 2U);
// LogDebug("DMR Slot %u, audio, errs: %u/141", m_slotNo, errors);
m_netErrs += errors;
}
m_netBits += 141U;
data[0U] = TAG_DATA;
data[1U] = 0x00U;
// Initialise the lost packet data
if (m_netFrames == 0U) {
::memcpy(m_lastFrame, data, DMR_FRAME_LENGTH_BYTES + 2U);
m_netSeqNo = dmrData.getSeqNo();
m_netN = dmrData.getN();
m_elapsed.start();
m_netLost = 0U;
} else {
insertSilence(data, dmrData.getSeqNo());
}
// Convert the Audio Sync to be from the BS
CSync::addDMRAudioSync(data + 2U);
writeQueueNet(data);
m_packetTimer.start();
m_netFrames++;
// Save details in case we need to infill data
m_netSeqNo = dmrData.getSeqNo();
m_netN = dmrData.getN();
#if defined(DUMP_DMR)
writeFile(data);
#endif
}
} else if (dataType == DT_VOICE) {
if (m_netState != RS_NET_AUDIO)
return;
unsigned char fid = m_netLC->getFID();
if (fid == FID_ETSI || fid == FID_DMRA) {
unsigned int errors = m_fec.regenerateDMR(data + 2U);
// LogDebug("DMR Slot %u, audio, errs: %u/141", m_slotNo, errors);
m_netErrs += errors;
}
m_netBits += 141U;
// Regenerate the embedded LC
unsigned char lcss = m_netEmbeddedLC.getData(data + 2U, dmrData.getN());
// Change the color code in the EMB
m_lastEMB.putData(data + 2U);
m_lastEMB.setColorCode(m_colorCode);
m_lastEMB.setLCSS(lcss);
m_lastEMB.getData(data + 2U);
data[0U] = TAG_DATA;
data[1U] = 0x00U;
// Initialise the lost packet data
if (m_netFrames == 0U) {
::memcpy(m_lastFrame, data, DMR_FRAME_LENGTH_BYTES + 2U);
m_netSeqNo = dmrData.getSeqNo();
m_netN = dmrData.getN();
m_elapsed.start();
m_netLost = 0U;
} else {
insertSilence(data, dmrData.getSeqNo());
}
writeQueueNet(data);
m_packetTimer.start();
m_netFrames++;
// Save details in case we need to infill data
m_netSeqNo = dmrData.getSeqNo();
m_netN = dmrData.getN();
#if defined(DUMP_DMR)
writeFile(data);
#endif
} else if (dataType == DT_CSBK) {
CDMRCSBK csbk;
bool valid = csbk.put(data + 2U);
if (!valid) {
LogMessage("DMR Slot %u, unable to decode the network CSBK", m_slotNo);
return;
}
CSBKO csbko = csbk.getCSBKO();
if (csbko == CSBKO_BSDWNACT)
return;
bool gi = csbk.getGI();
unsigned int srcId = csbk.getSrcId();
unsigned int dstId = csbk.getDstId();
// Regenerate the CSBK data
csbk.get(data + 2U);
// Regenerate the Slot Type
CDMRSlotType slotType;
slotType.putData(data + 2U);
slotType.setColorCode(m_colorCode);
slotType.getData(data + 2U);
// Convert the Data Sync to be from the BS
CSync::addDMRDataSync(data + 2U);
data[0U] = TAG_DATA;
data[1U] = 0x00U;
writeQueueNet(data);
#if defined(DUMP_DMR)
openFile();
writeFile(data);
closeFile();
#endif
std::string src = m_lookup->find(srcId);
std::string dst = m_lookup->find(dstId);
switch (csbko) {
case CSBKO_UUVREQ:
LogMessage("DMR Slot %u, received network Unit to Unit Voice Service Request CSBK from %s to %s%s", m_slotNo, src.c_str(), gi ? "TG ": "", dst.c_str());
break;
case CSBKO_UUANSRSP:
LogMessage("DMR Slot %u, received network Unit to Unit Voice Service Answer Response CSBK from %s to %s%s", m_slotNo, src.c_str(), gi ? "TG ": "", dst.c_str());
break;
case CSBKO_NACKRSP:
LogMessage("DMR Slot %u, received network Negative Acknowledgment Response CSBK from %s to %s%s", m_slotNo, src.c_str(), gi ? "TG ": "", dst.c_str());
break;
case CSBKO_PRECCSBK:
LogMessage("DMR Slot %u, received network Preamble CSBK from %s to %s%s", m_slotNo, src.c_str(), gi ? "TG ": "", dst.c_str());
break;
default:
LogWarning("DMR Slot %u, unhandled network CSBK type - 0x%02X", m_slotNo, csbko);
break;
}
} else if (dataType == DT_RATE_12_DATA || dataType == DT_RATE_34_DATA || dataType == DT_RATE_1_DATA) {
if (m_netState != RS_NET_DATA || m_netFrames == 0U)
return;
// Regenerate the rate 1/2 payload
if (dataType == DT_RATE_12_DATA) {
CBPTC19696 bptc;
unsigned char payload[12U];
bptc.decode(data + 2U, payload);
bptc.encode(payload, data + 2U);
}
// Regenerate the Slot Type
CDMRSlotType slotType;
slotType.putData(data + 2U);
slotType.setColorCode(m_colorCode);
slotType.getData(data + 2U);
// Convert the Data Sync to be from the BS
CSync::addDMRDataSync(data + 2U);
m_netFrames--;
data[0U] = m_netFrames == 0U ? TAG_EOT : TAG_DATA;
data[1U] = 0x00U;
#if defined(DUMP_DMR)
writeFile(data);
#endif
writeQueueNet(data);
if (m_netFrames == 0U)
endOfNetData();
} else {
// Unhandled data type
LogWarning("DMR Slot %u, unhandled network data type - 0x%02X", m_slotNo, dataType);
}
}
void CDMRSlot::clock()
{
unsigned int ms = m_interval.elapsed();
m_interval.start();
m_rfTimeoutTimer.clock(ms);
m_netTimeoutTimer.clock(ms);
if (m_netState == RS_NET_AUDIO || m_netState == RS_NET_DATA) {
m_networkWatchdog.clock(ms);
if (m_networkWatchdog.hasExpired()) {
if (m_netState == RS_NET_AUDIO) {
// We've received the voice header haven't we?
m_netFrames += 1U;
if (m_netBits == 0U) m_netBits = 1U;
LogMessage("DMR Slot %u, network watchdog has expired, %.1f seconds, %u%% packet loss, BER: %.1f%%", m_slotNo, float(m_netFrames) / 16.667F, (m_netLost * 100U) / m_netFrames, float(m_netErrs * 100U) / float(m_netBits));
writeEndNet(true);
#if defined(DUMP_DMR)
closeFile();
#endif
} else {
LogMessage("DMR Slot %u, network watchdog has expired", m_slotNo);
writeEndNet();
#if defined(DUMP_DMR)
closeFile();
#endif
}
}
}
if (m_netState == RS_NET_AUDIO) {
m_packetTimer.clock(ms);
if (m_packetTimer.isRunning() && m_packetTimer.hasExpired()) {
unsigned int elapsed = m_elapsed.elapsed();
unsigned int frames = elapsed / DMR_SLOT_TIME;
if (frames > m_netFrames) {
unsigned int count = frames - m_netFrames;
if (count > 3U) {
LogDebug("DMR Slot %u, lost audio for 300ms filling in, elapsed: %ums, expected: %u, received: %u", m_slotNo, elapsed, frames, m_netFrames);
insertSilence(count - 1U);
}
}
m_packetTimer.start();
}
}
}
void CDMRSlot::writeQueueRF(const unsigned char *data)
{
assert(data != NULL);
if (m_netState != RS_NET_IDLE)
return;
unsigned char len = DMR_FRAME_LENGTH_BYTES + 2U;
unsigned int space = m_queue.freeSpace();
if (space < (len + 1U)) {
LogError("DMR Slot %u, overflow in the DMR slot RF queue", m_slotNo);
return;
}
m_queue.addData(&len, 1U);
// If the timeout has expired, replace the audio with idles to keep the slot busy
if (m_rfTimeoutTimer.isRunning() && m_rfTimeoutTimer.hasExpired())
m_queue.addData(m_idle, len);
else
m_queue.addData(data, len);
}
void CDMRSlot::writeNetworkRF(const unsigned char* data, unsigned char dataType, FLCO flco, unsigned int srcId, unsigned int dstId, unsigned char errors)
{
assert(data != NULL);
if (m_netState != RS_NET_IDLE)
return;
if (m_network == NULL)
return;
// Don't send to the network if the timeout has expired
if (m_rfTimeoutTimer.isRunning() && m_rfTimeoutTimer.hasExpired())
return;
CDMRData dmrData;
dmrData.setSlotNo(m_slotNo);
dmrData.setDataType(dataType);
dmrData.setSrcId(srcId);
dmrData.setDstId(dstId);
dmrData.setFLCO(flco);
dmrData.setN(m_rfN);
dmrData.setSeqNo(m_rfSeqNo);
dmrData.setBER(errors);
m_rfSeqNo++;
dmrData.setData(data + 2U);
m_network->write(dmrData);
}
void CDMRSlot::writeNetworkRF(const unsigned char* data, unsigned char dataType, unsigned char errors)
{
assert(data != NULL);
assert(m_rfLC != NULL);
writeNetworkRF(data, dataType, m_rfLC->getFLCO(), m_rfLC->getSrcId(), m_rfLC->getDstId(), errors);
}
void CDMRSlot::writeQueueNet(const unsigned char *data)
{
assert(data != NULL);
unsigned char len = DMR_FRAME_LENGTH_BYTES + 2U;
unsigned int space = m_queue.freeSpace();
if (space < (len + 1U)) {
LogError("DMR Slot %u, overflow in the DMR slot RF queue", m_slotNo);
return;
}
m_queue.addData(&len, 1U);
// If the timeout has expired, replace the audio with idles to keep the slot busy
if (m_netTimeoutTimer.isRunning() && m_netTimeoutTimer.hasExpired())
m_queue.addData(m_idle, len);
else
m_queue.addData(data, len);
}
void CDMRSlot::init(unsigned int id, unsigned int colorCode, bool selfOnly, const std::vector<unsigned int>& prefixes, const std::vector<unsigned int>& blackList, CModem* modem, CDMRIPSC* network, IDisplay* display, bool duplex, CDMRLookup* lookup)
{
assert(id != 0U);
assert(modem != NULL);
assert(display != NULL);
assert(lookup != NULL);
m_id = id;
m_colorCode = colorCode;
m_selfOnly = selfOnly;
m_prefixes = prefixes;
m_blackList = blackList;
m_modem = modem;
m_network = network;
m_display = display;
m_duplex = duplex;
m_lookup = lookup;
m_idle = new unsigned char[DMR_FRAME_LENGTH_BYTES + 2U];
::memcpy(m_idle, DMR_IDLE_DATA, DMR_FRAME_LENGTH_BYTES + 2U);
// Generate the Slot Type for the Idle frame
CDMRSlotType slotType;
slotType.setColorCode(colorCode);
slotType.setDataType(DT_IDLE);
slotType.getData(m_idle + 2U);
}
bool CDMRSlot::validateId(unsigned int id)
{
if (m_selfOnly) {
return id == m_id;
} else {
if (std::find(m_blackList.begin(), m_blackList.end(), id) != m_blackList.end())
return false;
unsigned int prefix = id / 10000U;
if (prefix == 0U || prefix > 999U)
return false;
if (m_prefixes.size() == 0U)
return true;
return std::find(m_prefixes.begin(), m_prefixes.end(), prefix) != m_prefixes.end();
}
}
void CDMRSlot::setShortLC(unsigned int slotNo, unsigned int id, FLCO flco, bool voice)
{
assert(m_modem != NULL);
switch (slotNo) {
case 1U:
m_id1 = 0U;
m_flco1 = flco;
m_voice1 = voice;
if (id != 0U) {
unsigned char buffer[3U];
buffer[0U] = (id << 16) & 0xFFU;
buffer[1U] = (id << 8) & 0xFFU;
buffer[2U] = (id << 0) & 0xFFU;
m_id1 = CCRC::crc8(buffer, 3U);
}
break;
case 2U:
m_id2 = 0U;
m_flco2 = flco;
m_voice2 = voice;
if (id != 0U) {
unsigned char buffer[3U];
buffer[0U] = (id << 16) & 0xFFU;
buffer[1U] = (id << 8) & 0xFFU;
buffer[2U] = (id << 0) & 0xFFU;
m_id2 = CCRC::crc8(buffer, 3U);
}
break;
default:
LogError("Invalid slot number passed to setShortLC - %u", slotNo);
return;
}
unsigned char lc[5U];
lc[0U] = 0x01U;
lc[1U] = 0x00U;
lc[2U] = 0x00U;
lc[3U] = 0x00U;
if (m_id1 != 0U) {
lc[2U] = m_id1;
if (m_voice1) {
if (m_flco1 == FLCO_GROUP)
lc[1U] |= 0x80U;
else
lc[1U] |= 0x90U;
} else {
if (m_flco1 == FLCO_GROUP)
lc[1U] |= 0xB0U;
else
lc[1U] |= 0xA0U;
}
}
if (m_id2 != 0U) {
lc[3U] = m_id2;
if (m_voice2) {
if (m_flco2 == FLCO_GROUP)
lc[1U] |= 0x08U;
else
lc[1U] |= 0x09U;
} else {
if (m_flco2 == FLCO_GROUP)
lc[1U] |= 0x0BU;
else
lc[1U] |= 0x0AU;
}
}
lc[4U] = CCRC::crc8(lc, 4U);
unsigned char sLC[9U];
CDMRShortLC shortLC;
shortLC.encode(lc, sLC);
m_modem->writeDMRShortLC(sLC);
}
bool CDMRSlot::openFile()
{
if (m_fp != NULL)
return true;
time_t t;
::time(&t);
struct tm* tm = ::localtime(&t);
char name[100U];
::sprintf(name, "DMR_%u_%04d%02d%02d_%02d%02d%02d.ambe", m_slotNo, tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec);
m_fp = ::fopen(name, "wb");
if (m_fp == NULL)
return false;
::fwrite("DMR", 1U, 3U, m_fp);
return true;
}
bool CDMRSlot::writeFile(const unsigned char* data)
{
if (m_fp == NULL)
return false;
::fwrite(data, 1U, DMR_FRAME_LENGTH_BYTES + 2U, m_fp);
return true;
}
void CDMRSlot::closeFile()
{
if (m_fp != NULL) {
::fclose(m_fp);
m_fp = NULL;
}
}
void CDMRSlot::insertSilence(const unsigned char* data, unsigned char seqNo)
{
assert(data != NULL);
// Check to see if we have any spaces to fill?
unsigned char seq = m_netSeqNo + 1U;
if (seq == seqNo) {
// Just copy the data, nothing else to do here
::memcpy(m_lastFrame, data, DMR_FRAME_LENGTH_BYTES + 2U);
return;
}
unsigned int oldSeqNo = m_netSeqNo + 1U;
unsigned int newSeqNo = seqNo;
unsigned int count;
if (newSeqNo > oldSeqNo)
count = newSeqNo - oldSeqNo;
else
count = (256U + newSeqNo) - oldSeqNo;
if (count < 10U)
insertSilence(count);
::memcpy(m_lastFrame, data, DMR_FRAME_LENGTH_BYTES + 2U);
}
void CDMRSlot::insertSilence(unsigned int count)
{
unsigned char data[DMR_FRAME_LENGTH_BYTES + 2U];
::memcpy(data, m_lastFrame, 2U); // The control data
::memcpy(data + 2U, m_lastFrame + 24U + 2U, 9U); // Copy the last audio block to the first
::memcpy(data + 24U + 2U, data + 2U, 9U); // Copy the last audio block to the last
::memcpy(data + 9U + 2U, data + 2U, 5U); // Copy the last audio block to the middle (1/2)
::memcpy(data + 19U + 2U, data + 4U + 2U, 5U); // Copy the last audio block to the middle (2/2)
unsigned char n = (m_netN + 1U) % 6U;
unsigned char seqNo = m_netSeqNo + 1U;
unsigned char fid = m_netLC->getFID();
for (unsigned int i = 0U; i < count; i++) {
// Only use our silence frame if its AMBE audio data
if (fid == FID_ETSI || fid == FID_DMRA) {
if (i > 0U)
::memcpy(data, DMR_SILENCE_DATA, DMR_FRAME_LENGTH_BYTES + 2U);
}
if (n == 0U) {
CSync::addDMRAudioSync(data + 2U);
} else {
unsigned char lcss = m_netEmbeddedLC.getData(data + 2U, n);
m_lastEMB.setColorCode(m_colorCode);
m_lastEMB.setLCSS(lcss);
m_lastEMB.getData(data + 2U);
}
writeQueueNet(data);
m_netSeqNo = seqNo;
m_netN = n;
m_netFrames++;
m_netLost++;
seqNo++;
n = (n + 1U) % 6U;
}
}
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