MMDVMHost-Private/YSFControl.cpp

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/*
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* Copyright (C) 2015,2016,2017 Jonathan Naylor, G4KLX
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*
* 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 "YSFControl.h"
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#include "YSFFICH.h"
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#include "Utils.h"
#include "Sync.h"
#include "Log.h"
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#include <cstdio>
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#include <cassert>
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#include <cstring>
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#include <ctime>
// #define DUMP_YSF
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CYSFControl::CYSFControl(const std::string& callsign, CYSFNetwork* network, CDisplay* display, unsigned int timeout, bool duplex, bool lowDeviation, bool remoteGateway, CRSSIInterpolator* rssiMapper) :
m_callsign(NULL),
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m_network(network),
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m_display(display),
m_duplex(duplex),
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m_lowDeviation(lowDeviation),
m_remoteGateway(remoteGateway),
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m_queue(5000U, "YSF Control"),
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m_rfState(RS_RF_LISTENING),
m_netState(RS_NET_IDLE),
m_rfTimeoutTimer(1000U, timeout),
m_netTimeoutTimer(1000U, timeout),
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m_packetTimer(1000U, 0U, 200U),
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m_networkWatchdog(1000U, 0U, 1500U),
m_elapsed(),
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m_rfFrames(0U),
m_netFrames(0U),
m_netLost(0U),
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m_rfErrs(0U),
m_rfBits(1U),
m_netErrs(0U),
m_netBits(1U),
m_rfSource(NULL),
m_rfDest(NULL),
m_netSource(NULL),
m_netDest(NULL),
m_lastFrame(NULL),
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m_lastFrameValid(false),
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m_lastMode(YSF_DT_VOICE_FR_MODE),
m_lastMR(YSF_MR_NOT_BUSY),
m_netN(0U),
m_rfPayload(),
m_netPayload(),
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m_rssiMapper(rssiMapper),
m_rssi(0U),
m_maxRSSI(0U),
m_minRSSI(0U),
m_aveRSSI(0U),
m_rssiCount(0U),
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m_fp(NULL)
{
assert(display != NULL);
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assert(rssiMapper != NULL);
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m_rfPayload.setUplink(callsign);
m_rfPayload.setDownlink(callsign);
m_netPayload.setDownlink(callsign);
m_netSource = new unsigned char[YSF_CALLSIGN_LENGTH];
m_netDest = new unsigned char[YSF_CALLSIGN_LENGTH];
m_lastFrame = new unsigned char[YSF_FRAME_LENGTH_BYTES + 2U];
m_callsign = new unsigned char[YSF_CALLSIGN_LENGTH];
std::string node = callsign;
node.resize(YSF_CALLSIGN_LENGTH, ' ');
for (unsigned int i = 0U; i < YSF_CALLSIGN_LENGTH; i++)
m_callsign[i] = node.at(i);
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}
CYSFControl::~CYSFControl()
{
delete[] m_netSource;
delete[] m_netDest;
delete[] m_lastFrame;
delete[] m_callsign;
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}
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bool CYSFControl::writeModem(unsigned char *data, unsigned int len)
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{
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assert(data != NULL);
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unsigned char type = data[0U];
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if (type == TAG_LOST && m_rfState == RS_RF_AUDIO) {
if (m_rssi != 0U)
LogMessage("YSF, transmission lost, %.1f seconds, BER: %.1f%%, RSSI: -%u/-%u/-%u dBm", float(m_rfFrames) / 10.0F, float(m_rfErrs * 100U) / float(m_rfBits), m_minRSSI, m_maxRSSI, m_aveRSSI / m_rssiCount);
else
LogMessage("YSF, transmission lost, %.1f seconds, BER: %.1f%%", float(m_rfFrames) / 10.0F, float(m_rfErrs * 100U) / float(m_rfBits));
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writeEndRF();
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return false;
}
if (type == TAG_LOST)
return false;
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// Have we got RSSI bytes on the end?
if (len == (YSF_FRAME_LENGTH_BYTES + 4U)) {
uint16_t raw = 0U;
raw |= (data[122U] << 8) & 0xFF00U;
raw |= (data[123U] << 0) & 0x00FFU;
// Convert the raw RSSI to dBm
int rssi = m_rssiMapper->interpolate(raw);
LogDebug("YSF, raw RSSI: %u, reported RSSI: %d dBm", raw, rssi);
// RSSI is always reported as positive
m_rssi = (rssi >= 0) ? rssi : -rssi;
if (m_rssi > m_minRSSI)
m_minRSSI = m_rssi;
if (m_rssi < m_maxRSSI)
m_maxRSSI = m_rssi;
m_aveRSSI += m_rssi;
m_rssiCount++;
}
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CYSFFICH fich;
bool valid = fich.decode(data + 2U);
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if (valid && m_rfState == RS_RF_LISTENING) {
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unsigned char fi = fich.getFI();
if (fi == YSF_FI_TERMINATOR)
return false;
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m_rfFrames = 0U;
m_rfErrs = 0U;
m_rfBits = 1U;
m_rfTimeoutTimer.start();
m_rfPayload.reset();
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m_rfState = RS_RF_AUDIO;
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m_minRSSI = m_rssi;
m_maxRSSI = m_rssi;
m_aveRSSI = m_rssi;
m_rssiCount = 1U;
#if defined(DUMP_YSF)
openFile();
#endif
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}
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if (m_rfState != RS_RF_AUDIO)
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return false;
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if (valid)
m_lastMR = fich.getMR();
// Stop repeater packets coming through, unless we're acting as a remote gateway
if (m_remoteGateway) {
if (m_lastMR != YSF_MR_BUSY)
return false;
} else {
if (m_lastMR == YSF_MR_BUSY)
return false;
}
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unsigned char fi = fich.getFI();
if (valid && fi == YSF_FI_HEADER) {
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CSync::addYSFSync(data + 2U);
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// LogDebug("YSF, FICH: FI: %u, DT: %u, FN: %u, FT: %u", fich.getFI(), fich.getDT(), fich.getFN(), fich.getFT());
valid = m_rfPayload.processHeaderData(data + 2U);
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if (valid)
m_rfSource = m_rfPayload.getSource();
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unsigned char cm = fich.getCM();
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if (cm == YSF_CM_GROUP) {
m_rfDest = (unsigned char*)"ALL ";
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} else {
if (valid)
m_rfDest = m_rfPayload.getDest();
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}
if (m_rfSource != NULL && m_rfDest != NULL) {
m_display->writeFusion((char*)m_rfSource, (char*)m_rfDest, "R", " ");
LogMessage("YSF, received RF header from %10.10s to %10.10s", m_rfSource, m_rfDest);
} else if (m_rfSource == NULL && m_rfDest != NULL) {
m_display->writeFusion("??????????", (char*)m_rfDest, "R", " ");
LogMessage("YSF, received RF header from ?????????? to %10.10s", m_rfDest);
} else if (m_rfSource != NULL && m_rfDest == NULL) {
m_display->writeFusion((char*)m_rfSource, "??????????", "R", " ");
LogMessage("YSF, received RF header from %10.10s to ??????????", m_rfSource);
} else {
m_display->writeFusion("??????????", "??????????", "R", " ");
LogMessage("YSF, received RF header from ?????????? to ??????????");
}
data[0U] = TAG_DATA;
data[1U] = 0x00U;
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writeNetwork(data, m_rfFrames % 128U);
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#if defined(DUMP_YSF)
writeFile(data + 2U);
#endif
if (m_duplex) {
fich.setMR(m_remoteGateway ? YSF_MR_NOT_BUSY : YSF_MR_BUSY);
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fich.setDev(m_lowDeviation);
fich.encode(data + 2U);
writeQueueRF(data);
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}
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m_rfFrames++;
m_display->writeFusionRSSI(m_rssi);
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} else if (valid && fi == YSF_FI_TERMINATOR) {
CSync::addYSFSync(data + 2U);
// LogDebug("YSF, FICH: FI: %u, DT: %u, FN: %u, FT: %u", fich.getFI(), fich.getDT(), fich.getFN(), fich.getFT());
m_rfPayload.processHeaderData(data + 2U);
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data[0U] = TAG_EOT;
data[1U] = 0x00U;
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writeNetwork(data, m_rfFrames % 128U);
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#if defined(DUMP_YSF)
writeFile(data + 2U);
#endif
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if (m_duplex) {
fich.setMR(m_remoteGateway ? YSF_MR_NOT_BUSY : YSF_MR_BUSY);
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fich.setDev(m_lowDeviation);
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fich.encode(data + 2U);
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writeQueueRF(data);
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}
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m_rfFrames++;
if (m_rssi != 0U)
LogMessage("YSF, received RF end of transmission, %.1f seconds, BER: %.1f%%, RSSI: -%u/-%u/-%u dBm", float(m_rfFrames) / 10.0F, float(m_rfErrs * 100U) / float(m_rfBits), m_minRSSI, m_maxRSSI, m_aveRSSI / m_rssiCount);
else
LogMessage("YSF, received RF end of transmission, %.1f seconds, BER: %.1f%%", float(m_rfFrames) / 10.0F, float(m_rfErrs * 100U) / float(m_rfBits));
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writeEndRF();
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return false;
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} else if (valid) {
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CSync::addYSFSync(data + 2U);
unsigned char bn = fich.getBN();
unsigned char bt = fich.getBT();
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unsigned char fn = fich.getFN();
unsigned char ft = fich.getFT();
unsigned char dt = fich.getDT();
// LogDebug("YSF, FICH: FI: %u, DT: %u, FN: %u, FT: %u", fich.getFI(), fich.getDT(), fich.getFN(), fich.getFT());
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switch (dt) {
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case YSF_DT_VD_MODE1: {
valid = m_rfPayload.processVDMode1Data(data + 2U, fn);
unsigned int errors = m_rfPayload.processVDMode1Audio(data + 2U);
m_rfErrs += errors;
m_rfBits += 235U;
m_display->writeFusionBER(float(errors) / 2.35F);
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LogDebug("YSF, V/D Mode 1, seq %u, AMBE FEC %u/235 (%.1f%%)", m_rfFrames % 128, errors, float(errors) / 2.35F);
}
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break;
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case YSF_DT_VD_MODE2: {
valid = m_rfPayload.processVDMode2Data(data + 2U, fn);
unsigned int errors = m_rfPayload.processVDMode2Audio(data + 2U);
m_rfErrs += errors;
m_rfBits += 135U;
m_display->writeFusionBER(float(errors) / 1.35F);
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LogDebug("YSF, V/D Mode 2, seq %u, Repetition FEC %u/135 (%.1f%%)", m_rfFrames % 128, errors, float(errors) / 1.35F);
}
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break;
case YSF_DT_DATA_FR_MODE:
LogDebug("YSF, RF data FICH B=%u/%u F=%u/%u", bn, bt, fn, ft);
valid = m_rfPayload.processDataFRModeData(data + 2U, fn);
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break;
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case YSF_DT_VOICE_FR_MODE:
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if (fn != 0U || ft != 1U) {
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// The first packet after the header is odd, don't try and regenerate it
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unsigned int errors = m_rfPayload.processVoiceFRModeAudio(data + 2U);
m_rfErrs += errors;
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m_rfBits += 720U;
m_display->writeFusionBER(float(errors) / 7.2F);
LogDebug("YSF, V Mode 3, seq %u, AMBE FEC %u/720 (%.1f%%)", m_rfFrames % 128, errors, float(errors) / 7.2F);
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}
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valid = false;
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break;
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default:
break;
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}
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bool change = false;
if (m_rfDest == NULL) {
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unsigned char cm = fich.getCM();
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if (cm == YSF_CM_GROUP) {
m_rfDest = (unsigned char*)"ALL ";
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change = true;
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} else if (valid) {
m_rfDest = m_rfPayload.getDest();
if (m_rfDest != NULL)
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change = true;
}
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}
if (valid && m_rfSource == NULL) {
m_rfSource = m_rfPayload.getSource();
if (m_rfSource != NULL)
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change = true;
}
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if (change) {
if (m_rfSource != NULL && m_rfDest != NULL) {
m_display->writeFusion((char*)m_rfSource, (char*)m_rfDest, "R", " ");
LogMessage("YSF, received RF data from %10.10s to %10.10s", m_rfSource, m_rfDest);
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}
if (m_rfSource != NULL && m_rfDest == NULL) {
m_display->writeFusion((char*)m_rfSource, "??????????", "R", " ");
LogMessage("YSF, received RF data from %10.10s to ??????????", m_rfSource);
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}
if (m_rfSource == NULL && m_rfDest != NULL) {
m_display->writeFusion("??????????", (char*)m_rfDest, "R", " ");
LogMessage("YSF, received RF data from ?????????? to %10.10s", m_rfDest);
}
}
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data[0U] = TAG_DATA;
data[1U] = 0x00U;
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writeNetwork(data, m_rfFrames % 128U);
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if (m_duplex) {
fich.setMR(m_remoteGateway ? YSF_MR_NOT_BUSY : YSF_MR_BUSY);
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fich.setDev(m_lowDeviation);
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fich.encode(data + 2U);
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writeQueueRF(data);
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}
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#if defined(DUMP_YSF)
writeFile(data + 2U);
#endif
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m_rfFrames++;
m_display->writeFusionRSSI(m_rssi);
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} else {
CSync::addYSFSync(data + 2U);
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data[0U] = TAG_DATA;
data[1U] = 0x00U;
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writeNetwork(data, m_rfFrames % 128U);
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if (m_duplex)
writeQueueRF(data);
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#if defined(DUMP_YSF)
writeFile(data + 2U);
#endif
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m_rfFrames++;
m_display->writeFusionRSSI(m_rssi);
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}
return true;
}
unsigned int CYSFControl::readModem(unsigned char* data)
{
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assert(data != NULL);
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if (m_queue.isEmpty())
return 0U;
unsigned char len = 0U;
m_queue.getData(&len, 1U);
m_queue.getData(data, len);
return len;
}
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void CYSFControl::writeEndRF()
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{
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m_rfState = RS_RF_LISTENING;
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m_rfTimeoutTimer.stop();
m_rfPayload.reset();
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// These variables are free'd by YSFPayload
m_rfSource = NULL;
m_rfDest = NULL;
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if (m_netState == RS_NET_IDLE) {
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m_display->clearFusion();
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if (m_network != NULL)
m_network->reset();
}
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#if defined(DUMP_YSF)
closeFile();
#endif
}
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void CYSFControl::writeEndNet()
{
m_netState = RS_NET_IDLE;
m_netTimeoutTimer.stop();
m_networkWatchdog.stop();
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m_packetTimer.stop();
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m_lastFrameValid = false;
m_netPayload.reset();
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m_display->clearFusion();
if (m_network != NULL)
m_network->reset();
}
void CYSFControl::writeNetwork()
{
unsigned char data[200U];
unsigned int length = m_network->read(data);
if (length == 0U)
return;
if (m_rfState != RS_RF_LISTENING && m_netState == RS_NET_IDLE)
return;
m_networkWatchdog.start();
bool gateway = ::memcmp(data + 4U, m_callsign, YSF_CALLSIGN_LENGTH) == 0;
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unsigned char n = (data[34U] & 0xFEU) >> 1;
bool end = (data[34U] & 0x01U) == 0x01U;
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if (!m_netTimeoutTimer.isRunning()) {
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if (end)
return;
if (::memcmp(data + 14U, " ", YSF_CALLSIGN_LENGTH) != 0)
::memcpy(m_netSource, data + 14U, YSF_CALLSIGN_LENGTH);
else
::memcpy(m_netSource, "??????????", YSF_CALLSIGN_LENGTH);
if (::memcmp(data + 24U, " ", YSF_CALLSIGN_LENGTH) != 0)
::memcpy(m_netDest, data + 24U, YSF_CALLSIGN_LENGTH);
else
::memcpy(m_netDest, "??????????", YSF_CALLSIGN_LENGTH);
m_display->writeFusion((char*)m_netSource, (char*)m_netDest, "N", (char*)(data + 4U));
LogMessage("YSF, received network data from %10.10s to %10.10s at %10.10s", m_netSource, m_netDest, data + 4U);
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m_netTimeoutTimer.start();
m_netPayload.reset();
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m_packetTimer.start();
m_elapsed.start();
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m_lastFrameValid = false;
m_netState = RS_NET_AUDIO;
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m_netFrames = 0U;
m_netLost = 0U;
m_netErrs = 0U;
m_netBits = 1U;
m_netN = 0U;
} else {
// Check for duplicate frames, if we can
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if (m_netN == n)
return;
bool changed = false;
if (::memcmp(data + 14U, " ", YSF_CALLSIGN_LENGTH) != 0 && ::memcmp(m_netSource, "??????????", YSF_CALLSIGN_LENGTH) == 0) {
::memcpy(m_netSource, data + 14U, YSF_CALLSIGN_LENGTH);
changed = true;
}
if (::memcmp(data + 24U, " ", YSF_CALLSIGN_LENGTH) != 0 && ::memcmp(m_netDest, "??????????", YSF_CALLSIGN_LENGTH) == 0) {
::memcpy(m_netDest, data + 24U, YSF_CALLSIGN_LENGTH);
changed = true;
}
if (changed) {
m_display->writeFusion((char*)m_netSource, (char*)m_netDest, "N", (char*)(data + 4U));
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LogMessage("YSF, received network data from %10.10s to %10.10s at %10.10s", m_netSource, m_netDest, data + 4U);
}
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}
data[33U] = end ? TAG_EOT : TAG_DATA;
data[34U] = 0x00U;
// bool send = true;
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CYSFFICH fich;
bool valid = fich.decode(data + 35U);
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if (valid) {
unsigned char dt = fich.getDT();
unsigned char fn = fich.getFN();
unsigned char ft = fich.getFT();
unsigned char fi = fich.getFI();
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fich.setVoIP(true);
fich.setMR(m_remoteGateway ? YSF_MR_NOT_BUSY : YSF_MR_BUSY);
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fich.setDev(m_lowDeviation);
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fich.encode(data + 35U);
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m_lastMode = dt;
// Set the downlink callsign
switch (fi) {
case YSF_FI_HEADER:
case YSF_FI_TERMINATOR:
m_netPayload.processHeaderData(data + 35U);
break;
case YSF_FI_COMMUNICATIONS:
switch (dt) {
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case YSF_DT_VD_MODE1: {
m_netPayload.processVDMode1Data(data + 35U, fn, gateway);
unsigned int errors = m_netPayload.processVDMode1Audio(data + 35U);
// send = insertSilence(data + 33U, n);
// if (send) {
m_netErrs += errors;
m_netBits += 235U;
// }
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}
break;
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case YSF_DT_VD_MODE2: {
m_netPayload.processVDMode2Data(data + 35U, fn, gateway);
unsigned int errors = m_netPayload.processVDMode2Audio(data + 35U);
// send = insertSilence(data + 33U, n);
// if (send) {
m_netErrs += errors;
m_netBits += 135U;
// }
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}
break;
case YSF_DT_DATA_FR_MODE:
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m_netPayload.processDataFRModeData(data + 35U, fn, gateway);
break;
case YSF_DT_VOICE_FR_MODE:
if (fn != 0U || ft != 1U) {
// The first packet after the header is odd, don't try and regenerate it
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unsigned int errors = m_netPayload.processVoiceFRModeAudio(data + 35U);
// send = insertSilence(data + 33U, n);
// if (send) {
m_netErrs += errors;
m_netBits += 720U;
// }
}
break;
default:
break;
}
break;
default:
break;
}
} else {
// send = insertSilence(data + 33U, n);
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}
// if (send) {
writeQueueNet(data + 33U);
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m_packetTimer.start();
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m_netFrames++;
m_netN = n;
// }
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if (end) {
LogMessage("YSF, received network end of transmission, %.1f seconds, %u%% packet loss, BER: %.1f%%", float(m_netFrames) / 10.0F, (m_netLost * 100U) / m_netFrames, float(m_netErrs * 100U) / float(m_netBits));
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writeEndNet();
}
}
void CYSFControl::clock(unsigned int ms)
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{
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if (m_network != NULL)
writeNetwork();
m_rfTimeoutTimer.clock(ms);
m_netTimeoutTimer.clock(ms);
if (m_netState == RS_NET_AUDIO) {
m_networkWatchdog.clock(ms);
if (m_networkWatchdog.hasExpired()) {
LogMessage("YSF, network watchdog has expired, %.1f seconds, %u%% packet loss, BER: %.1f%%", float(m_netFrames) / 10.0F, (m_netLost * 100U) / m_netFrames, float(m_netErrs * 100U) / float(m_netBits));
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writeEndNet();
}
}
/*
if (m_netState == RS_NET_AUDIO) {
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m_packetTimer.clock(ms);
if (m_packetTimer.isRunning() && m_packetTimer.hasExpired()) {
unsigned int elapsed = m_elapsed.elapsed();
unsigned int frames = elapsed / YSF_FRAME_TIME;
if (frames > m_netFrames) {
unsigned int count = frames - m_netFrames;
if (count > 2U) {
LogDebug("YSF, lost audio for 200ms filling in, elapsed: %ums, expected: %u, received: %u", elapsed, frames, m_netFrames);
insertSilence(count - 1U);
}
}
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m_packetTimer.start();
}
}
*/
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}
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void CYSFControl::writeQueueRF(const unsigned char *data)
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{
assert(data != NULL);
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if (m_netState != RS_NET_IDLE)
return;
if (m_rfTimeoutTimer.isRunning() && m_rfTimeoutTimer.hasExpired())
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return;
unsigned char len = YSF_FRAME_LENGTH_BYTES + 2U;
unsigned int space = m_queue.freeSpace();
if (space < (len + 1U)) {
LogError("YSF, overflow in the System Fusion RF queue");
return;
}
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m_queue.addData(&len, 1U);
m_queue.addData(data, len);
}
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void CYSFControl::writeQueueNet(const unsigned char *data)
{
assert(data != NULL);
if (m_netTimeoutTimer.isRunning() && m_netTimeoutTimer.hasExpired())
return;
unsigned char len = YSF_FRAME_LENGTH_BYTES + 2U;
unsigned int space = m_queue.freeSpace();
if (space < (len + 1U)) {
LogError("YSF, overflow in the System Fusion RF queue");
return;
}
m_queue.addData(&len, 1U);
m_queue.addData(data, len);
}
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void CYSFControl::writeNetwork(const unsigned char *data, unsigned int count)
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{
assert(data != NULL);
if (m_network == NULL)
return;
if (m_rfTimeoutTimer.isRunning() && m_rfTimeoutTimer.hasExpired())
return;
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m_network->write(m_rfSource, m_rfDest, data + 2U, count, data[0U] == TAG_EOT);
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}
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bool CYSFControl::openFile()
{
if (m_fp != NULL)
return true;
time_t t;
::time(&t);
struct tm* tm = ::localtime(&t);
char name[100U];
::sprintf(name, "YSF_%04d%02d%02d_%02d%02d%02d.ambe", 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("YSF", 1U, 3U, m_fp);
return true;
}
bool CYSFControl::writeFile(const unsigned char* data)
{
if (m_fp == NULL)
return false;
::fwrite(data, 1U, YSF_FRAME_LENGTH_BYTES, m_fp);
return true;
}
void CYSFControl::closeFile()
{
if (m_fp != NULL) {
::fclose(m_fp);
m_fp = NULL;
}
}
bool CYSFControl::insertSilence(const unsigned char* data, unsigned char n)
{
assert(data != NULL);
// Check to see if we have any spaces to fill?
unsigned char newN = (m_netN + 1U) % 128U;
if (newN == n) {
// Just copy the data, nothing else to do here
::memcpy(m_lastFrame, data, YSF_FRAME_LENGTH_BYTES + 2U);
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m_lastFrameValid = true;
return true;
}
LogDebug("YSF, current=%u last=%u", n, m_netN);
unsigned int count;
if (n > newN)
count = n - newN;
else
count = (128U + n) - newN;
if (count >= 4U) {
LogDebug("YSF, frame is out of range, count = %u", count);
return false;
}
insertSilence(count);
::memcpy(m_lastFrame, data, YSF_FRAME_LENGTH_BYTES + 2U);
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m_lastFrameValid = true;
return true;
}
void CYSFControl::insertSilence(unsigned int count)
{
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// We can't meaningfully create "silent" data
if (m_lastMode == YSF_DT_DATA_FR_MODE)
return;
LogDebug("YSF, insert %u frames", count);
unsigned char n = (m_netN + 1U) % 128U;
for (unsigned int i = 0U; i < count; i++) {
writeQueueNet(m_lastFrame);
m_netN = n;
m_netFrames++;
m_netLost++;
n = (n + 1U) % 128U;
}
LogDebug("YSF, last=%u", m_netN);
}