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MMDVMHost-Private/P25Control.cpp
Jonathan Naylor 54ae56942f Add P25 end of transmission data.
2019-09-29 16:34:56 +01:00

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/*
* Copyright (C) 2016-2019 by Jonathan Naylor G4KLX
* Copyright (C) 2018 by Bryan Biedenkapp <gatekeep@gmail.com>
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "P25Control.h"
#include "P25Defines.h"
#include "P25Trellis.h"
#include "P25Utils.h"
#include "Utils.h"
#include "Sync.h"
#include "CRC.h"
#include "Log.h"
#include <cassert>
#include <cstdio>
#include <cstring>
#include <ctime>
// #define DUMP_P25
const unsigned char BIT_MASK_TABLE[] = {0x80U, 0x40U, 0x20U, 0x10U, 0x08U, 0x04U, 0x02U, 0x01U};
#define WRITE_BIT(p,i,b) p[(i)>>3] = (b) ? (p[(i)>>3] | BIT_MASK_TABLE[(i)&7]) : (p[(i)>>3] & ~BIT_MASK_TABLE[(i)&7])
#define READ_BIT(p,i) (p[(i)>>3] & BIT_MASK_TABLE[(i)&7])
CP25Control::CP25Control(unsigned int nac, unsigned int id, bool selfOnly, bool uidOverride, CP25Network* network, CDisplay* display, unsigned int timeout, bool duplex, CDMRLookup* lookup, bool remoteGateway, CRSSIInterpolator* rssiMapper) :
m_nac(nac),
m_id(id),
m_selfOnly(selfOnly),
m_uidOverride(uidOverride),
m_remoteGateway(remoteGateway),
m_network(network),
m_display(display),
m_duplex(duplex),
m_lookup(lookup),
m_queue(1000U, "P25 Control"),
m_rfState(RS_RF_LISTENING),
m_netState(RS_NET_IDLE),
m_rfTimeout(1000U, timeout),
m_netTimeout(1000U, timeout),
m_networkWatchdog(1000U, 0U, 1500U),
m_rfFrames(0U),
m_rfBits(0U),
m_rfErrs(0U),
m_netFrames(0U),
m_netLost(0U),
m_rfDataFrames(0U),
m_nid(nac),
m_lastDUID(P25_DUID_TERM),
m_audio(),
m_rfData(),
m_netData(),
m_rfLSD(),
m_netLSD(),
m_netLDU1(NULL),
m_netLDU2(NULL),
m_lastIMBE(NULL),
m_rfLDU(NULL),
m_rfPDU(NULL),
m_rfPDUCount(0U),
m_rfPDUBits(0U),
m_rssiMapper(rssiMapper),
m_rssi(0U),
m_maxRSSI(0U),
m_minRSSI(0U),
m_aveRSSI(0U),
m_rssiCount(0U),
m_enabled(true),
m_fp(NULL)
{
assert(display != NULL);
assert(lookup != NULL);
assert(rssiMapper != NULL);
m_netLDU1 = new unsigned char[9U * 25U];
m_netLDU2 = new unsigned char[9U * 25U];
::memset(m_netLDU1, 0x00U, 9U * 25U);
::memset(m_netLDU2, 0x00U, 9U * 25U);
m_lastIMBE = new unsigned char[11U];
::memcpy(m_lastIMBE, P25_NULL_IMBE, 11U);
m_rfLDU = new unsigned char[P25_LDU_FRAME_LENGTH_BYTES];
::memset(m_rfLDU, 0x00U, P25_LDU_FRAME_LENGTH_BYTES);
m_rfPDU = new unsigned char[P25_MAX_PDU_COUNT * P25_LDU_FRAME_LENGTH_BYTES + 2U];
::memset(m_rfPDU, 0x00U, P25_MAX_PDU_COUNT * P25_LDU_FRAME_LENGTH_BYTES + 2U);
}
CP25Control::~CP25Control()
{
delete[] m_netLDU1;
delete[] m_netLDU2;
delete[] m_lastIMBE;
delete[] m_rfLDU;
delete[] m_rfPDU;
}
bool CP25Control::writeModem(unsigned char* data, unsigned int len)
{
assert(data != NULL);
if (!m_enabled)
return false;
bool sync = data[1U] == 0x01U;
if (data[0U] == TAG_LOST && m_rfState == RS_RF_AUDIO) {
bool grp = m_rfData.getLCF() == P25_LCF_GROUP;
unsigned int dstId = m_rfData.getDstId();
std::string source = m_lookup->find(m_rfData.getSrcId());
if (m_rssi != 0U)
LogMessage("P25, transmission lost from %s to %s%u, %.1f seconds, BER: %.1f%%, RSSI: -%u/-%u/-%u dBm", source.c_str(), grp ? "TG " : "", dstId, float(m_rfFrames) / 5.56F, float(m_rfErrs * 100U) / float(m_rfBits), m_minRSSI, m_maxRSSI, m_aveRSSI / m_rssiCount);
else
LogMessage("P25, transmission lost from %s to %s%u, %.1f seconds, BER: %.1f%%", source.c_str(), grp ? "TG " : "", dstId, float(m_rfFrames) / 5.56F, float(m_rfErrs * 100U) / float(m_rfBits));
if (m_netState == RS_NET_IDLE)
m_display->clearP25();
writeNetwork(m_rfLDU, m_lastDUID, true);
writeNetwork(data + 2U, P25_DUID_TERM, true);
m_rfState = RS_RF_LISTENING;
m_rfTimeout.stop();
m_rfData.reset();
#if defined(DUMP_P25)
closeFile();
#endif
return false;
}
if (data[0U] == TAG_LOST && m_rfState == RS_RF_DATA) {
if (m_netState == RS_NET_IDLE)
m_display->clearP25();
m_rfState = RS_RF_LISTENING;
m_rfPDUCount = 0U;
m_rfPDUBits = 0U;
#if defined(DUMP_P25)
closeFile();
#endif
return false;
}
if (data[0U] == TAG_LOST) {
m_rfState = RS_RF_LISTENING;
return false;
}
if (!sync && m_rfState == RS_RF_LISTENING)
return false;
// Decode the NID
bool valid = m_nid.decode(data + 2U);
if (m_rfState == RS_RF_LISTENING && !valid)
return false;
unsigned char duid = m_nid.getDUID();
if (!valid) {
switch (m_lastDUID) {
case P25_DUID_HEADER:
case P25_DUID_LDU2:
duid = P25_DUID_LDU1;
break;
case P25_DUID_LDU1:
duid = P25_DUID_LDU2;
break;
case P25_DUID_PDU:
duid = P25_DUID_PDU;
break;
case P25_DUID_TSDU:
duid = P25_DUID_TSDU;
break;
default:
break;
}
}
// Have we got RSSI bytes on the end of a P25 LDU?
if (len == (P25_LDU_FRAME_LENGTH_BYTES + 4U)) {
uint16_t raw = 0U;
raw |= (data[218U] << 8) & 0xFF00U;
raw |= (data[219U] << 0) & 0x00FFU;
// Convert the raw RSSI to dBm
int rssi = m_rssiMapper->interpolate(raw);
if (rssi != 0)
LogDebug("P25, 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++;
}
if (duid == P25_DUID_LDU1) {
if (m_rfState == RS_RF_LISTENING) {
m_rfData.reset();
bool ret = m_rfData.decodeLDU1(data + 2U);
if (!ret) {
m_lastDUID = duid;
return false;
}
unsigned int srcId = m_rfData.getSrcId();
if (m_selfOnly) {
if (m_id > 99999999U) { // Check that the Config DMR-ID is bigger than 8 digits
if (srcId != m_id / 100U)
return false;
}
else if (m_id > 9999999U) { // Check that the Config DMR-ID is bigger than 7 digits
if (srcId != m_id / 10U)
return false;
}
else if (srcId != m_id) { // All other cases
return false;
}
}
if (!m_uidOverride) {
bool found = m_lookup->exists(srcId);
if (!found)
return false;
}
bool grp = m_rfData.getLCF() == P25_LCF_GROUP;
unsigned int dstId = m_rfData.getDstId();
std::string source = m_lookup->find(srcId);
LogMessage("P25, received RF voice transmission from %s to %s%u", source.c_str(), grp ? "TG " : "", dstId);
m_display->writeP25(source.c_str(), grp, dstId, "R");
m_rfState = RS_RF_AUDIO;
m_minRSSI = m_rssi;
m_maxRSSI = m_rssi;
m_aveRSSI = m_rssi;
m_rssiCount = 1U;
createRFHeader();
writeNetwork(data + 2U, P25_DUID_HEADER, false);
} else if (m_rfState == RS_RF_AUDIO) {
writeNetwork(m_rfLDU, m_lastDUID, false);
}
if (m_rfState == RS_RF_AUDIO) {
// Regenerate Sync
CSync::addP25Sync(data + 2U);
// Regenerate NID
m_nid.encode(data + 2U, P25_DUID_LDU1);
// Regenerate LDU1 Data
m_rfData.encodeLDU1(data + 2U);
// Regenerate the Low Speed Data
m_rfLSD.process(data + 2U);
// Regenerate Audio
unsigned int errors = m_audio.process(data + 2U);
LogDebug("P25, LDU1 audio, errs: %u/1233 (%.1f%%)", errors, float(errors) / 12.33F);
m_display->writeP25BER(float(errors) / 12.33F);
m_rfBits += 1233U;
m_rfErrs += errors;
m_rfFrames++;
m_lastDUID = duid;
// Add busy bits
addBusyBits(data + 2U, P25_LDU_FRAME_LENGTH_BITS, false, true);
#if defined(DUMP_P25)
writeFile(data + 2U, len - 2U);
#endif
::memcpy(m_rfLDU, data + 2U, P25_LDU_FRAME_LENGTH_BYTES);
if (m_duplex) {
data[0U] = TAG_DATA;
data[1U] = 0x00U;
writeQueueRF(data, P25_LDU_FRAME_LENGTH_BYTES + 2U);
}
m_display->writeP25RSSI(m_rssi);
return true;
}
} else if (duid == P25_DUID_LDU2) {
if (m_rfState == RS_RF_AUDIO) {
writeNetwork(m_rfLDU, m_lastDUID, false);
// Regenerate Sync
CSync::addP25Sync(data + 2U);
// Regenerate NID
m_nid.encode(data + 2U, P25_DUID_LDU2);
// Add the dummy LDU2 data
m_rfData.encodeLDU2(data + 2U);
// Regenerate the Low Speed Data
m_rfLSD.process(data + 2U);
// Regenerate Audio
unsigned int errors = m_audio.process(data + 2U);
LogDebug("P25, LDU2 audio, errs: %u/1233 (%.1f%%)", errors, float(errors) / 12.33F);
m_display->writeP25BER(float(errors) / 12.33F);
m_rfBits += 1233U;
m_rfErrs += errors;
m_rfFrames++;
m_lastDUID = duid;
// Add busy bits
addBusyBits(data + 2U, P25_LDU_FRAME_LENGTH_BITS, false, true);
#if defined(DUMP_P25)
writeFile(data + 2U, len - 2U);
#endif
::memcpy(m_rfLDU, data + 2U, P25_LDU_FRAME_LENGTH_BYTES);
if (m_duplex) {
data[0U] = TAG_DATA;
data[1U] = 0x00U;
writeQueueRF(data, P25_LDU_FRAME_LENGTH_BYTES + 2U);
}
m_display->writeP25RSSI(m_rssi);
return true;
}
} else if (duid == P25_DUID_TSDU) {
if (m_rfState != RS_RF_DATA) {
m_rfPDUCount = 0U;
m_rfPDUBits = 0U;
m_rfState = RS_RF_DATA;
m_rfDataFrames = 0U;
}
bool ret = m_rfData.decodeTSDU(data + 2U);
if (!ret) {
m_lastDUID = duid;
return false;
}
bool grp = m_rfData.getLCF() == P25_LCF_GROUP;
unsigned int dstId = m_rfData.getDstId();
std::string source = m_lookup->find(m_rfData.getSrcId());
unsigned char data[P25_TSDU_FRAME_LENGTH_BYTES + 2U];
switch (m_rfData.getLCF()) {
case P25_LCF_TSBK_CALL_ALERT:
LogMessage("P25, received RF TSDU transmission, CALL ALERT from %s to %s%u", source.c_str(), grp ? "TG " : "", dstId);
::memset(data + 2U, 0x00U, P25_TSDU_FRAME_LENGTH_BYTES);
// Regenerate Sync
CSync::addP25Sync(data + 2U);
// Regenerate NID
m_nid.encode(data + 2U, P25_DUID_TSDU);
// Regenerate TDULC Data
m_rfData.encodeTSDU(data + 2U);
// Add busy bits
addBusyBits(data + 2U, P25_TSDU_FRAME_LENGTH_BITS, true, false);
// Set first busy bits to 1,1
setBusyBits(data + 2U, P25_SS0_START, true, true);
if (m_duplex) {
data[0U] = TAG_DATA;
data[1U] = 0x00U;
writeQueueRF(data, P25_TSDU_FRAME_LENGTH_BYTES + 2U);
}
break;
case P25_LCF_TSBK_ACK_RSP_FNE:
LogMessage("P25, received RF TSDU transmission, ACK RESPONSE FNE from %s to %s%u", source.c_str(), grp ? "TG " : "", dstId);
::memset(data + 2U, 0x00U, P25_TSDU_FRAME_LENGTH_BYTES);
// Regenerate Sync
CSync::addP25Sync(data + 2U);
// Regenerate NID
m_nid.encode(data + 2U, P25_DUID_TSDU);
// Regenerate TDULC Data
m_rfData.encodeTSDU(data + 2U);
// Add busy bits
addBusyBits(data + 2U, P25_TSDU_FRAME_LENGTH_BITS, true, false);
// Set first busy bits to 1,1
setBusyBits(data + 2U, P25_SS0_START, true, true);
if (m_duplex) {
data[0U] = TAG_DATA;
data[1U] = 0x00U;
writeQueueRF(data, P25_TSDU_FRAME_LENGTH_BYTES + 2U);
}
break;
default:
LogMessage("P25, recieved RF TSDU transmission, unhandled LCF $%02X", m_rfData.getLCF());
break;
}
m_rfState = RS_RF_LISTENING;
return true;
} else if (duid == P25_DUID_TERM || duid == P25_DUID_TERM_LC) {
if (m_rfState == RS_RF_AUDIO) {
writeNetwork(m_rfLDU, m_lastDUID, true);
::memset(data + 2U, 0x00U, P25_TERM_FRAME_LENGTH_BYTES);
// Regenerate Sync
CSync::addP25Sync(data + 2U);
// Regenerate NID
m_nid.encode(data + 2U, P25_DUID_TERM);
// Add busy bits
addBusyBits(data + 2U, P25_TERM_FRAME_LENGTH_BITS, false, true);
bool grp = m_rfData.getLCF() == P25_LCF_GROUP;
unsigned int dstId = m_rfData.getDstId();
std::string source = m_lookup->find(m_rfData.getSrcId());
m_rfState = RS_RF_LISTENING;
m_rfTimeout.stop();
m_rfData.reset();
m_lastDUID = duid;
if (m_rssi != 0U)
LogMessage("P25, received RF end of voice transmission from %s to %s%u, %.1f seconds, BER: %.1f%%, RSSI: -%u/-%u/-%u dBm", source.c_str(), grp ? "TG " : "", dstId, float(m_rfFrames) / 5.56F, float(m_rfErrs * 100U) / float(m_rfBits), m_minRSSI, m_maxRSSI, m_aveRSSI / m_rssiCount);
else
LogMessage("P25, received RF end of voice transmission from %s to %s%u, %.1f seconds, BER: %.1f%%", source.c_str(), grp ? "TG " : "", dstId, float(m_rfFrames) / 5.56F, float(m_rfErrs * 100U) / float(m_rfBits));
m_display->clearP25();
#if defined(DUMP_P25)
closeFile();
#endif
writeNetwork(data + 2U, P25_DUID_TERM, true);
if (m_duplex) {
data[0U] = TAG_EOT;
data[1U] = 0x00U;
writeQueueRF(data, P25_TERM_FRAME_LENGTH_BYTES + 2U);
}
}
} else if (duid == P25_DUID_PDU) {
if (m_rfState != RS_RF_DATA) {
m_rfPDUCount = 0U;
m_rfPDUBits = 0U;
m_rfState = RS_RF_DATA;
m_rfDataFrames = 0U;
}
unsigned int start = m_rfPDUCount * P25_LDU_FRAME_LENGTH_BITS;
unsigned char buffer[P25_LDU_FRAME_LENGTH_BYTES];
unsigned int bits = CP25Utils::decode(data + 2U, buffer, start, start + P25_LDU_FRAME_LENGTH_BITS);
for (unsigned int i = 0U; i < bits; i++, m_rfPDUBits++) {
bool b = READ_BIT(buffer, i);
WRITE_BIT(m_rfPDU, m_rfPDUBits, b);
}
if (m_rfPDUCount == 0U) {
CP25Trellis trellis;
unsigned char header[P25_PDU_HEADER_LENGTH_BYTES];
bool valid = trellis.decode12(m_rfPDU + P25_SYNC_LENGTH_BYTES + P25_NID_LENGTH_BYTES, header);
if (valid)
valid = CCRC::checkCCITT162(header, P25_PDU_HEADER_LENGTH_BYTES);
if (valid) {
unsigned int llId = (header[3U] << 16) + (header[4U] << 8) + header[5U];
unsigned int sap = header[1U] & 0x3FU;
m_rfDataFrames = header[6U] & 0x7FU;
LogMessage("P25, received RF data transmission for Local Link Id %u, SAP %u, %u blocks", llId, sap, m_rfDataFrames);
} else {
m_rfPDUCount = 0U;
m_rfPDUBits = 0U;
m_rfState = RS_RF_LISTENING;
m_rfDataFrames = 0U;
}
}
if (m_rfState == RS_RF_DATA) {
m_rfPDUCount++;
unsigned int bitLength = ((m_rfDataFrames + 1U) * P25_PDU_FEC_LENGTH_BITS) + P25_SYNC_LENGTH_BITS + P25_NID_LENGTH_BITS;
if (m_rfPDUBits >= bitLength) {
unsigned int offset = P25_SYNC_LENGTH_BYTES + P25_NID_LENGTH_BYTES;
// Regenerate the PDU header
CP25Trellis trellis;
unsigned char header[P25_PDU_HEADER_LENGTH_BYTES];
trellis.decode12(m_rfPDU + offset, header);
trellis.encode12(header, m_rfPDU + offset);
offset += P25_PDU_FEC_LENGTH_BITS;
// Regenerate the PDU data
for (unsigned int i = 0U; i < m_rfDataFrames; i++) {
unsigned char data[P25_PDU_CONFIRMED_LENGTH_BYTES];
bool valid = trellis.decode34(m_rfPDU + offset, data);
if (valid) {
trellis.encode34(data, m_rfPDU + offset);
} else {
valid = trellis.decode12(m_rfPDU + offset, data);
if (valid)
trellis.encode12(data, m_rfPDU + offset);
}
offset += P25_PDU_FEC_LENGTH_BITS;
}
unsigned char pdu[1024U];
// Add the data
unsigned int newBitLength = CP25Utils::encode(m_rfPDU, pdu + 2U, bitLength);
unsigned int newByteLength = newBitLength / 8U;
if ((newBitLength % 8U) > 0U)
newByteLength++;
// Regenerate Sync
CSync::addP25Sync(pdu + 2U);
// Regenerate NID
m_nid.encode(pdu + 2U, P25_DUID_PDU);
// Add busy bits
addBusyBits(pdu + 2U, newBitLength, false, true);
if (m_duplex) {
pdu[0U] = TAG_DATA;
pdu[1U] = 0x00U;
writeQueueRF(pdu, newByteLength + 2U);
}
LogMessage("P25, ended RF data transmission");
m_display->clearP25();
m_rfPDUCount = 0U;
m_rfPDUBits = 0U;
m_rfState = RS_RF_LISTENING;
m_rfDataFrames = 0U;
}
return true;
}
}
return false;
}
unsigned int CP25Control::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 CP25Control::writeNetwork()
{
unsigned char data[100U];
if (m_network == NULL)
return;
unsigned int length = m_network->read(data, 100U);
if (length == 0U)
return;
if (!m_enabled)
return;
if (m_rfState != RS_RF_LISTENING && m_netState == RS_NET_IDLE)
return;
m_networkWatchdog.start();
switch (data[0U]) {
case 0x62U:
::memcpy(m_netLDU1 + 0U, data, 22U);
checkNetLDU2();
break;
case 0x63U:
::memcpy(m_netLDU1 + 25U, data, 14U);
checkNetLDU2();
break;
case 0x64U:
::memcpy(m_netLDU1 + 50U, data, 17U);
checkNetLDU2();
break;
case 0x65U:
::memcpy(m_netLDU1 + 75U, data, 17U);
checkNetLDU2();
break;
case 0x66U:
::memcpy(m_netLDU1 + 100U, data, 17U);
checkNetLDU2();
break;
case 0x67U:
::memcpy(m_netLDU1 + 125U, data, 17U);
checkNetLDU2();
break;
case 0x68U:
::memcpy(m_netLDU1 + 150U, data, 17U);
checkNetLDU2();
break;
case 0x69U:
::memcpy(m_netLDU1 + 175U, data, 17U);
checkNetLDU2();
break;
case 0x6AU:
::memcpy(m_netLDU1 + 200U, data, 16U);
checkNetLDU2();
if (m_netState != RS_NET_IDLE)
createNetLDU1();
break;
case 0x6BU:
::memcpy(m_netLDU2 + 0U, data, 22U);
checkNetLDU1();
break;
case 0x6CU:
::memcpy(m_netLDU2 + 25U, data, 14U);
checkNetLDU1();
break;
case 0x6DU:
::memcpy(m_netLDU2 + 50U, data, 17U);
checkNetLDU1();
break;
case 0x6EU:
::memcpy(m_netLDU2 + 75U, data, 17U);
checkNetLDU1();
break;
case 0x6FU:
::memcpy(m_netLDU2 + 100U, data, 17U);
checkNetLDU1();
break;
case 0x70U:
::memcpy(m_netLDU2 + 125U, data, 17U);
checkNetLDU1();
break;
case 0x71U:
::memcpy(m_netLDU2 + 150U, data, 17U);
checkNetLDU1();
break;
case 0x72U:
::memcpy(m_netLDU2 + 175U, data, 17U);
checkNetLDU1();
break;
case 0x73U:
::memcpy(m_netLDU2 + 200U, data, 16U);
if (m_netState == RS_NET_IDLE) {
createNetHeader();
createNetLDU1();
} else {
checkNetLDU1();
}
createNetLDU2();
break;
case 0x80U:
createNetTerminator();
break;
default:
break;
}
}
void CP25Control::clock(unsigned int ms)
{
if (m_network != NULL)
writeNetwork();
m_rfTimeout.clock(ms);
m_netTimeout.clock(ms);
if (m_netState == RS_NET_AUDIO) {
m_networkWatchdog.clock(ms);
if (m_networkWatchdog.hasExpired()) {
LogMessage("P25, network watchdog has expired, %.1f seconds, %u%% packet loss", float(m_netFrames) / 50.0F, (m_netLost * 100U) / m_netFrames);
m_display->clearP25();
m_networkWatchdog.stop();
m_netState = RS_NET_IDLE;
m_netData.reset();
m_netTimeout.stop();
}
}
}
void CP25Control::writeQueueRF(const unsigned char* data, unsigned int length)
{
assert(data != NULL);
if (m_rfTimeout.isRunning() && m_rfTimeout.hasExpired())
return;
unsigned int space = m_queue.freeSpace();
if (space < (length + 1U)) {
LogError("P25, overflow in the P25 RF queue");
return;
}
unsigned char len = length;
m_queue.addData(&len, 1U);
m_queue.addData(data, len);
}
void CP25Control::writeQueueNet(const unsigned char* data, unsigned int length)
{
assert(data != NULL);
if (m_netTimeout.isRunning() && m_netTimeout.hasExpired())
return;
unsigned int space = m_queue.freeSpace();
if (space < (length + 1U)) {
LogError("P25, overflow in the P25 RF queue");
return;
}
unsigned char len = length;
m_queue.addData(&len, 1U);
m_queue.addData(data, len);
}
void CP25Control::writeNetwork(const unsigned char *data, unsigned char type, bool end)
{
assert(data != NULL);
if (m_network == NULL)
return;
if (m_rfTimeout.isRunning() && m_rfTimeout.hasExpired())
return;
switch (type)
{
case P25_DUID_LDU1:
m_network->writeLDU1(data, m_rfData, m_rfLSD, end);
break;
case P25_DUID_LDU2:
m_network->writeLDU2(data, m_rfData, m_rfLSD, end);
break;
default:
break;
}
}
void CP25Control::setBusyBits(unsigned char* data, unsigned int ssOffset, bool b1, bool b2)
{
assert(data != NULL);
WRITE_BIT(data, ssOffset, b1);
WRITE_BIT(data, ssOffset + 1U, b2);
}
void CP25Control::addBusyBits(unsigned char* data, unsigned int length, bool b1, bool b2)
{
assert(data != NULL);
for (unsigned int ss0Pos = P25_SS0_START; ss0Pos < length; ss0Pos += P25_SS_INCREMENT) {
unsigned int ss1Pos = ss0Pos + 1U;
WRITE_BIT(data, ss0Pos, b1);
WRITE_BIT(data, ss1Pos, b2);
}
}
void CP25Control::checkNetLDU1()
{
if (m_netState == RS_NET_IDLE)
return;
// Check for an unflushed LDU1
if (m_netLDU1[0U] != 0x00U || m_netLDU1[25U] != 0x00U || m_netLDU1[50U] != 0x00U ||
m_netLDU1[75U] != 0x00U || m_netLDU1[100U] != 0x00U || m_netLDU1[125U] != 0x00U ||
m_netLDU1[150U] != 0x00U || m_netLDU1[175U] != 0x00U || m_netLDU1[200U] != 0x00U)
createNetLDU1();
}
void CP25Control::checkNetLDU2()
{
if (m_netState == RS_NET_IDLE)
return;
// Check for an unflushed LDU1
if (m_netLDU2[0U] != 0x00U || m_netLDU2[25U] != 0x00U || m_netLDU2[50U] != 0x00U ||
m_netLDU2[75U] != 0x00U || m_netLDU2[100U] != 0x00U || m_netLDU2[125U] != 0x00U ||
m_netLDU2[150U] != 0x00U || m_netLDU2[175U] != 0x00U || m_netLDU2[200U] != 0x00U)
createNetLDU2();
}
void CP25Control::insertMissingAudio(unsigned char* data)
{
if (data[0U] == 0x00U) {
::memcpy(data + 10U, m_lastIMBE, 11U);
m_netLost++;
} else {
::memcpy(m_lastIMBE, data + 10U, 11U);
}
if (data[25U] == 0x00U) {
::memcpy(data + 26U, m_lastIMBE, 11U);
m_netLost++;
} else {
::memcpy(m_lastIMBE, data + 26U, 11U);
}
if (data[50U] == 0x00U) {
::memcpy(data + 55U, m_lastIMBE, 11U);
m_netLost++;
} else {
::memcpy(m_lastIMBE, data + 55U, 11U);
}
if (data[75U] == 0x00U) {
::memcpy(data + 80U, m_lastIMBE, 11U);
m_netLost++;
} else {
::memcpy(m_lastIMBE, data + 80U, 11U);
}
if (data[100U] == 0x00U) {
::memcpy(data + 105U, m_lastIMBE, 11U);
m_netLost++;
} else {
::memcpy(m_lastIMBE, data + 105U, 11U);
}
if (data[125U] == 0x00U) {
::memcpy(data + 130U, m_lastIMBE, 11U);
m_netLost++;
} else {
::memcpy(m_lastIMBE, data + 130U, 11U);
}
if (data[150U] == 0x00U) {
::memcpy(data + 155U, m_lastIMBE, 11U);
m_netLost++;
} else {
::memcpy(m_lastIMBE, data + 155U, 11U);
}
if (data[175U] == 0x00U) {
::memcpy(data + 180U, m_lastIMBE, 11U);
m_netLost++;
} else {
::memcpy(m_lastIMBE, data + 180U, 11U);
}
if (data[200U] == 0x00U) {
::memcpy(data + 204U, m_lastIMBE, 11U);
m_netLost++;
} else {
::memcpy(m_lastIMBE, data + 204U, 11U);
}
}
void CP25Control::createRFHeader()
{
unsigned char buffer[P25_HDR_FRAME_LENGTH_BYTES + 2U];
::memset(buffer, 0x00U, P25_HDR_FRAME_LENGTH_BYTES + 2U);
buffer[0U] = TAG_HEADER;
buffer[1U] = 0x00U;
// Add the sync
CSync::addP25Sync(buffer + 2U);
// Add the NID
m_nid.encode(buffer + 2U, P25_DUID_HEADER);
// Add the dummy header
m_rfData.encodeHeader(buffer + 2U);
// Add busy bits
addBusyBits(buffer + 2U, P25_HDR_FRAME_LENGTH_BITS, false, true);
m_rfFrames = 0U;
m_rfErrs = 0U;
m_rfBits = 1U;
m_rfTimeout.start();
m_lastDUID = P25_DUID_HEADER;
::memset(m_rfLDU, 0x00U, P25_LDU_FRAME_LENGTH_BYTES);
#if defined(DUMP_P25)
openFile();
writeFile(buffer + 2U, buffer - 2U);
#endif
if (m_duplex) {
buffer[0U] = TAG_HEADER;
buffer[1U] = 0x00U;
writeQueueRF(buffer, P25_HDR_FRAME_LENGTH_BYTES + 2U);
}
}
void CP25Control::createNetHeader()
{
unsigned char lcf = m_netLDU1[51U];
unsigned char mfId = m_netLDU1[52U];
unsigned int dstId = (m_netLDU1[76U] << 16) + (m_netLDU1[77U] << 8) + m_netLDU1[78U];
unsigned int srcId = (m_netLDU1[101U] << 16) + (m_netLDU1[102U] << 8) + m_netLDU1[103U];
unsigned char algId = m_netLDU2[126U];
unsigned int kId = (m_netLDU2[127U] << 8) + m_netLDU2[128U];
unsigned char mi[P25_MI_LENGTH_BYTES];
::memcpy(mi + 0U, m_netLDU2 + 51U, 3U);
::memcpy(mi + 3U, m_netLDU2 + 76U, 3U);
::memcpy(mi + 6U, m_netLDU2 + 101U, 3U);
m_netData.reset();
m_netData.setMI(mi);
m_netData.setAlgId(algId);
m_netData.setKId(kId);
m_netData.setLCF(lcf);
m_netData.setMFId(mfId);
m_netData.setSrcId(srcId);
m_netData.setDstId(dstId);
std::string source = m_lookup->find(srcId);
LogMessage("P25, received network transmission from %s to %s%u", source.c_str(), lcf == P25_LCF_GROUP ? "TG " : "", dstId);
m_display->writeP25(source.c_str(), lcf == P25_LCF_GROUP, dstId, "N");
m_netState = RS_NET_AUDIO;
m_netTimeout.start();
m_netFrames = 0U;
m_netLost = 0U;
unsigned char buffer[P25_HDR_FRAME_LENGTH_BYTES + 2U];
::memset(buffer, 0x00U, P25_HDR_FRAME_LENGTH_BYTES + 2U);
buffer[0U] = TAG_HEADER;
buffer[1U] = 0x00U;
// Add the sync
CSync::addP25Sync(buffer + 2U);
// Add the NID
m_nid.encode(buffer + 2U, P25_DUID_HEADER);
// Add the dummy header
m_netData.encodeHeader(buffer + 2U);
// Add busy bits
if (m_remoteGateway)
addBusyBits(buffer + 2U, P25_HDR_FRAME_LENGTH_BITS, false, false);
else
addBusyBits(buffer + 2U, P25_HDR_FRAME_LENGTH_BITS, false, true);
writeQueueNet(buffer, P25_HDR_FRAME_LENGTH_BYTES + 2U);
}
void CP25Control::createNetLDU1()
{
insertMissingAudio(m_netLDU1);
unsigned char buffer[P25_LDU_FRAME_LENGTH_BYTES + 2U];
::memset(buffer, 0x00U, P25_LDU_FRAME_LENGTH_BYTES + 2U);
buffer[0U] = TAG_DATA;
buffer[1U] = 0x00U;
// Add the sync
CSync::addP25Sync(buffer + 2U);
// Add the NID
m_nid.encode(buffer + 2U, P25_DUID_LDU1);
// Add the LDU1 data
m_netData.encodeLDU1(buffer + 2U);
// Add the Audio
m_audio.encode(buffer + 2U, m_netLDU1 + 10U, 0U);
m_audio.encode(buffer + 2U, m_netLDU1 + 26U, 1U);
m_audio.encode(buffer + 2U, m_netLDU1 + 55U, 2U);
m_audio.encode(buffer + 2U, m_netLDU1 + 80U, 3U);
m_audio.encode(buffer + 2U, m_netLDU1 + 105U, 4U);
m_audio.encode(buffer + 2U, m_netLDU1 + 130U, 5U);
m_audio.encode(buffer + 2U, m_netLDU1 + 155U, 6U);
m_audio.encode(buffer + 2U, m_netLDU1 + 180U, 7U);
m_audio.encode(buffer + 2U, m_netLDU1 + 204U, 8U);
// Add the Low Speed Data
m_netLSD.setLSD1(m_netLDU1[201U]);
m_netLSD.setLSD2(m_netLDU1[202U]);
m_netLSD.encode(buffer + 2U);
// Add busy bits
if (m_remoteGateway)
addBusyBits(buffer + 2U, P25_LDU_FRAME_LENGTH_BITS, false, false);
else
addBusyBits(buffer + 2U, P25_LDU_FRAME_LENGTH_BITS, false, true);
writeQueueNet(buffer, P25_LDU_FRAME_LENGTH_BYTES + 2U);
::memset(m_netLDU1, 0x00U, 9U * 25U);
m_netFrames += 9U;
}
void CP25Control::createNetLDU2()
{
insertMissingAudio(m_netLDU2);
unsigned char buffer[P25_LDU_FRAME_LENGTH_BYTES + 2U];
::memset(buffer, 0x00U, P25_LDU_FRAME_LENGTH_BYTES + 2U);
buffer[0U] = TAG_DATA;
buffer[1U] = 0x00U;
// Add the sync
CSync::addP25Sync(buffer + 2U);
// Add the NID
m_nid.encode(buffer + 2U, P25_DUID_LDU2);
// Add the dummy LDU2 data
m_netData.encodeLDU2(buffer + 2U);
// Add the Audio
m_audio.encode(buffer + 2U, m_netLDU2 + 10U, 0U);
m_audio.encode(buffer + 2U, m_netLDU2 + 26U, 1U);
m_audio.encode(buffer + 2U, m_netLDU2 + 55U, 2U);
m_audio.encode(buffer + 2U, m_netLDU2 + 80U, 3U);
m_audio.encode(buffer + 2U, m_netLDU2 + 105U, 4U);
m_audio.encode(buffer + 2U, m_netLDU2 + 130U, 5U);
m_audio.encode(buffer + 2U, m_netLDU2 + 155U, 6U);
m_audio.encode(buffer + 2U, m_netLDU2 + 180U, 7U);
m_audio.encode(buffer + 2U, m_netLDU2 + 204U, 8U);
// Add the Low Speed Data
m_netLSD.setLSD1(m_netLDU2[201U]);
m_netLSD.setLSD2(m_netLDU2[202U]);
m_netLSD.encode(buffer + 2U);
// Add busy bits
if (m_remoteGateway)
addBusyBits(buffer + 2U, P25_LDU_FRAME_LENGTH_BITS, false, false);
else
addBusyBits(buffer + 2U, P25_LDU_FRAME_LENGTH_BITS, false, true);
writeQueueNet(buffer, P25_LDU_FRAME_LENGTH_BYTES + 2U);
::memset(m_netLDU2, 0x00U, 9U * 25U);
m_netFrames += 9U;
}
void CP25Control::createNetTerminator()
{
unsigned char buffer[P25_TERM_FRAME_LENGTH_BYTES + 2U];
::memset(buffer, 0x00U, P25_TERM_FRAME_LENGTH_BYTES + 2U);
buffer[0U] = TAG_EOT;
buffer[1U] = 0x00U;
// Add the sync
CSync::addP25Sync(buffer + 2U);
// Add the NID
m_nid.encode(buffer + 2U, P25_DUID_TERM);
// Add busy bits
if (m_remoteGateway)
addBusyBits(buffer + 2U, P25_TERM_FRAME_LENGTH_BITS, false, false);
else
addBusyBits(buffer + 2U, P25_TERM_FRAME_LENGTH_BITS, false, true);
writeQueueNet(buffer, P25_TERM_FRAME_LENGTH_BYTES + 2U);
std::string source = m_lookup->find(m_netData.getSrcId());
LogMessage("P25, network end of transmission from %s to %s%u, %.1f seconds, %u%% packet loss", source.c_str(), m_netData.getLCF() == P25_LCF_GROUP ? "TG " : "", m_netData.getDstId(), float(m_netFrames) / 50.0F, (m_netLost * 100U) / m_netFrames);
m_display->clearP25();
m_netTimeout.stop();
m_networkWatchdog.stop();
m_netData.reset();
m_netState = RS_NET_IDLE;
}
bool CP25Control::openFile()
{
if (m_fp != NULL)
return true;
time_t t;
::time(&t);
struct tm* tm = ::localtime(&t);
char name[100U];
::sprintf(name, "P25_%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("P25", 1U, 3U, m_fp);
return true;
}
bool CP25Control::writeFile(const unsigned char* data, unsigned char length)
{
if (m_fp == NULL)
return false;
::fwrite(&length, 1U, 1U, m_fp);
::fwrite(data, 1U, length, m_fp);
return true;
}
void CP25Control::closeFile()
{
if (m_fp != NULL) {
::fclose(m_fp);
m_fp = NULL;
}
}
bool CP25Control::isBusy() const
{
return m_rfState != RS_RF_LISTENING || m_netState != RS_NET_IDLE;
}
void CP25Control::enable(bool enabled)
{
if (!enabled && m_enabled) {
m_queue.clear();
// Reset the RF section
m_rfState = RS_RF_LISTENING;
m_rfTimeout.stop();
m_rfData.reset();
// Reset the networking section
m_netTimeout.stop();
m_networkWatchdog.stop();
m_netData.reset();
m_netState = RS_NET_IDLE;
}
m_enabled = enabled;
}
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