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dvmhost/nxdn/Control.cpp

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/**
* Digital Voice Modem - Host Software
* GPLv2 Open Source. Use is subject to license terms.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* @package DVM / Host Software
*
*/
//
// Based on code from the MMDVMHost project. (https://github.com/g4klx/MMDVMHost)
// Licensed under the GPLv2 License (https://opensource.org/licenses/GPL-2.0)
//
/*
* Copyright (C) 2015-2020 by Jonathan Naylor G4KLX
* Copyright (C) 2022 by Bryan Biedenkapp N2PLL
*
* 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 "Defines.h"
#include "nxdn/NXDNDefines.h"
#include "nxdn/Control.h"
#include "nxdn/acl/AccessControl.h"
#include "nxdn/channel/SACCH.h"
#include "nxdn/channel/FACCH1.h"
#include "nxdn/lc/RTCH.h"
#include "nxdn/Sync.h"
#include "edac/AMBEFEC.h"
#include "HostMain.h"
#include "Log.h"
#include "Utils.h"
using namespace nxdn;
using namespace nxdn::packet;
#include <cstdio>
#include <cassert>
#include <cstring>
#include <ctime>
// ---------------------------------------------------------------------------
// Constants
// ---------------------------------------------------------------------------
const uint8_t SCRAMBLER[] = {
0x00U, 0x00U, 0x00U, 0x82U, 0xA0U, 0x88U, 0x8AU, 0x00U, 0xA2U, 0xA8U, 0x82U, 0x8AU, 0x82U, 0x02U,
0x20U, 0x08U, 0x8AU, 0x20U, 0xAAU, 0xA2U, 0x82U, 0x08U, 0x22U, 0x8AU, 0xAAU, 0x08U, 0x28U, 0x88U,
0x28U, 0x28U, 0x00U, 0x0AU, 0x02U, 0x82U, 0x20U, 0x28U, 0x82U, 0x2AU, 0xAAU, 0x20U, 0x22U, 0x80U,
0xA8U, 0x8AU, 0x08U, 0xA0U, 0xAAU, 0x02U };
// ---------------------------------------------------------------------------
// Public Class Members
// ---------------------------------------------------------------------------
/// <summary>
/// Initializes a new instance of the Control class.
/// </summary>
/// <param name="ran">NXDN Radio Access Number.</param>
/// <param name="callHang">Amount of hangtime for a NXDN call.</param>
/// <param name="queueSize">Modem frame buffer queue size (bytes).</param>
/// <param name="timeout">Transmit timeout.</param>
/// <param name="tgHang">Amount of time to hang on the last talkgroup mode from RF.</param>
/// <param name="modem">Instance of the Modem class.</param>
/// <param name="network">Instance of the BaseNetwork class.</param>
/// <param name="duplex">Flag indicating full-duplex operation.</param>
/// <param name="ridLookup">Instance of the RadioIdLookup class.</param>
/// <param name="tidLookup">Instance of the TalkgroupIdLookup class.</param>
/// <param name="idenTable">Instance of the IdenTableLookup class.</param>
/// <param name="rssi">Instance of the RSSIInterpolator class.</param>
/// <param name="dumpRCCHData">Flag indicating whether RCCH data is dumped to the log.</param>
/// <param name="debug">Flag indicating whether P25 debug is enabled.</param>
/// <param name="verbose">Flag indicating whether P25 verbose logging is enabled.</param>
Control::Control(uint32_t ran, uint32_t callHang, uint32_t queueSize, uint32_t timeout, uint32_t tgHang,
modem::Modem* modem, network::BaseNetwork* network, bool duplex, lookups::RadioIdLookup* ridLookup,
lookups::TalkgroupIdLookup* tidLookup, lookups::IdenTableLookup* idenTable, lookups::RSSIInterpolator* rssiMapper,
bool dumpRCCHData, bool debug, bool verbose) :
m_voice(NULL),
m_data(NULL),
m_ran(ran),
m_timeout(timeout),
m_modem(modem),
m_network(network),
m_duplex(duplex),
m_control(false),
m_dedicatedControl(false),
m_voiceOnControl(false),
m_rfLastLICH(),
m_rfLC(),
m_netLC(),
m_rfMask(0U),
m_netMask(0U),
m_idenTable(idenTable),
m_ridLookup(ridLookup),
m_tidLookup(tidLookup),
m_affiliations("NXDN Affiliations", verbose),
m_idenEntry(),
m_queue(queueSize, "NXDN Frame"),
m_rfState(RS_RF_LISTENING),
m_rfLastDstId(0U),
m_netState(RS_NET_IDLE),
m_netLastDstId(0U),
m_ccRunning(false),
m_ccPrevRunning(false),
m_ccHalted(false),
m_rfTimeout(1000U, timeout),
m_rfTGHang(1000U, tgHang),
m_netTimeout(1000U, timeout),
m_networkWatchdog(1000U, 0U, 1500U),
m_ccPacketInterval(1000U, 0U, 10U),
m_ccFrameCnt(0U),
m_ccSeq(0U),
m_siteData(),
m_rssiMapper(rssiMapper),
m_rssi(0U),
m_maxRSSI(0U),
m_minRSSI(0U),
m_aveRSSI(0U),
m_rssiCount(0U),
m_verbose(verbose),
m_debug(debug)
{
assert(ridLookup != NULL);
assert(tidLookup != NULL);
assert(idenTable != NULL);
assert(rssiMapper != NULL);
acl::AccessControl::init(m_ridLookup, m_tidLookup);
m_voice = new Voice(this, network, debug, verbose);
m_trunk = new Trunk(this, network, debug, verbose, dumpRCCHData);
m_data = new Data(this, network, debug, verbose);
}
/// <summary>
/// Finalizes a instance of the Control class.
/// </summary>
Control::~Control()
{
if (m_voice != NULL) {
delete m_voice;
}
if (m_trunk != NULL) {
delete m_trunk;
}
if (m_data != NULL) {
delete m_data;
}
}
/// <summary>
/// Resets the data states for the RF interface.
/// </summary>
void Control::reset()
{
m_rfState = RS_RF_LISTENING;
m_ccHalted = false;
if (m_voice != NULL) {
m_voice->resetRF();
}
if (m_data != NULL) {
m_data->resetRF();
}
m_queue.clear();
m_rfMask = 0x00U;
m_rfLC.reset();
m_netState = RS_NET_IDLE;
m_netMask = 0x00U;
m_netLC.reset();
}
/// <summary>
/// Helper to set NXDN configuration options.
/// </summary>
/// <param name="conf">Instance of the yaml::Node class.</param>
/// <param name="cwCallsign"></param>
/// <param name="voiceChNo"></param>
/// <param name="locId"></param>
/// <param name="channelId"></param>
/// <param name="channelNo"></param>
/// <param name="printOptions"></param>
void Control::setOptions(yaml::Node& conf, const std::string cwCallsign, const std::vector<uint32_t> voiceChNo,
uint16_t locId, uint8_t channelId, uint32_t channelNo, bool printOptions)
{
yaml::Node systemConf = conf["system"];
yaml::Node nxdnProtocol = conf["protocols"]["nxdn"];
m_trunk->m_verifyAff = nxdnProtocol["verifyAff"].as<bool>(false);
m_trunk->m_verifyReg = nxdnProtocol["verifyReg"].as<bool>(false);
yaml::Node control = nxdnProtocol["control"];
m_control = control["enable"].as<bool>(false);
if (m_control) {
m_dedicatedControl = control["dedicated"].as<bool>(false);
}
else {
m_dedicatedControl = false;
}
m_voiceOnControl = nxdnProtocol["voiceOnControl"].as<bool>(false);
m_voice->m_silenceThreshold = nxdnProtocol["silenceThreshold"].as<uint32_t>(nxdn::DEFAULT_SILENCE_THRESHOLD);
if (m_voice->m_silenceThreshold > MAX_NXDN_VOICE_ERRORS) {
LogWarning(LOG_NXDN, "Silence threshold > %u, defaulting to %u", nxdn::MAX_NXDN_VOICE_ERRORS, nxdn::DEFAULT_SILENCE_THRESHOLD);
m_voice->m_silenceThreshold = nxdn::DEFAULT_SILENCE_THRESHOLD;
}
bool disableCompositeFlag = nxdnProtocol["disableCompositeFlag"].as<bool>(false);
uint8_t serviceClass = NXDN_SIF1_VOICE_CALL_SVC | NXDN_SIF1_DATA_CALL_SVC;
if (m_control) {
serviceClass |= NXDN_SIF1_GRP_REG_SVC;
}
if (m_voiceOnControl) {
if (!disableCompositeFlag) {
serviceClass |= NXDN_SIF1_COMPOSITE_CONTROL;
}
}
m_siteData = SiteData(locId, channelId, channelNo, serviceClass, false);
m_siteData.setCallsign(cwCallsign);
std::vector<lookups::IdenTable> entries = m_idenTable->list();
for (auto it = entries.begin(); it != entries.end(); ++it) {
lookups::IdenTable entry = *it;
if (entry.channelId() == channelId) {
m_idenEntry = entry;
break;
}
}
std::vector<uint32_t> availCh = voiceChNo;
for (auto it = availCh.begin(); it != availCh.end(); ++it) {
m_affiliations.addRFCh(*it);
}
if (printOptions) {
LogInfo(" Silence Threshold: %u (%.1f%%)", m_voice->m_silenceThreshold, float(m_voice->m_silenceThreshold) / 12.33F);
if (m_control) {
LogInfo(" Voice on Control: %s", m_voiceOnControl ? "yes" : "no");
}
LogInfo(" Verify Affiliation: %s", m_trunk->m_verifyAff ? "yes" : "no");
LogInfo(" Verify Registration: %s", m_trunk->m_verifyReg ? "yes" : "no");
}
if (m_voice != NULL) {
m_voice->resetRF();
m_voice->resetNet();
}
if (m_data != NULL) {
m_data->resetRF();
}
if (m_trunk != NULL) {
m_trunk->resetRF();
m_trunk->resetNet();
}
}
/// <summary>
/// Process a data frame from the RF interface.
/// </summary>
/// <param name="data">Buffer containing data frame.</param>
/// <param name="len">Length of data frame.</param>
/// <returns></returns>
bool Control::processFrame(uint8_t* data, uint32_t len)
{
assert(data != NULL);
uint8_t type = data[0U];
if (type == modem::TAG_LOST && m_rfState == RS_RF_AUDIO) {
if (m_rssi != 0U) {
::ActivityLog("NXDN", true, "transmission lost, %.1f seconds, BER: %.1f%%, RSSI: -%u/-%u/-%u dBm",
float(m_voice->m_rfFrames) / 12.5F, float(m_voice->m_rfErrs * 100U) / float(m_voice->m_rfBits), m_minRSSI, m_maxRSSI, m_aveRSSI / m_rssiCount);
}
else {
::ActivityLog("NXDN", true, "transmission lost, %.1f seconds, BER: %.1f%%",
float(m_voice->m_rfFrames) / 12.5F, float(m_voice->m_rfErrs * 100U) / float(m_voice->m_rfBits));
}
LogMessage(LOG_RF, "NXDN, " NXDN_RTCH_MSG_TYPE_TX_REL ", total frames: %d, bits: %d, undecodable LC: %d, errors: %d, BER: %.4f%%",
m_voice->m_rfFrames, m_voice->m_rfBits, m_voice->m_rfUndecodableLC, m_voice->m_rfErrs, float(m_voice->m_rfErrs * 100U) / float(m_voice->m_rfBits));
if (m_control) {
m_affiliations.releaseGrant(m_rfLC.getDstId(), false);
}
writeEndRF();
return false;
}
if (type == modem::TAG_LOST && m_rfState == RS_RF_DATA) {
writeEndRF();
return false;
}
if (type == modem::TAG_LOST) {
m_rfState = RS_RF_LISTENING;
m_rfMask = 0x00U;
m_rfLC.reset();
return false;
}
// Have we got RSSI bytes on the end?
if (len == (NXDN_FRAME_LENGTH_BYTES + 4U)) {
uint16_t raw = 0U;
raw |= (data[50U] << 8) & 0xFF00U;
raw |= (data[51U] << 0) & 0x00FFU;
// Convert the raw RSSI to dBm
int rssi = m_rssiMapper->interpolate(raw);
if (m_verbose) {
LogMessage(LOG_RF, "NXDN, 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++;
}
scrambler(data + 2U);
channel::LICH lich;
bool valid = lich.decode(data + 2U);
if (valid)
m_rfLastLICH = lich;
uint8_t rfct = m_rfLastLICH.getRFCT();
uint8_t fct = m_rfLastLICH.getFCT();
uint8_t option = m_rfLastLICH.getOption();
if (m_debug) {
LogDebug(LOG_RF, "NXDN, rfState = %u, netState = %u, fct = %u", m_rfState, m_netState, fct);
}
// are we interrupting a running CC?
if (m_ccRunning) {
if ((fct != NXDN_LICH_CAC_INBOUND_SHORT) || (fct != NXDN_LICH_CAC_INBOUND_LONG)) {
m_ccHalted = true;
}
}
bool ret = false;
if (rfct == NXDN_LICH_RFCT_RCCH) {
ret = m_trunk->process(fct, option, data, len);
}
else if (rfct == NXDN_LICH_RFCT_RTCH || rfct == NXDN_LICH_RFCT_RDCH) {
switch (fct) {
case NXDN_LICH_USC_UDCH:
if (!m_dedicatedControl) {
ret = m_data->process(option, data, len);
}
else {
if (m_voiceOnControl && m_affiliations.isChBusy(m_siteData.channelNo())) {
ret = m_data->process(option, data, len);
}
}
break;
default:
if (!m_dedicatedControl) {
ret = m_voice->process(fct, option, data, len);
}
else {
if (m_voiceOnControl && m_affiliations.isChBusy(m_siteData.channelNo())) {
ret = m_voice->process(fct, option, data, len);
}
}
break;
}
}
return ret;
}
/// <summary>
/// Get frame data from data ring buffer.
/// </summary>
/// <param name="data">Buffer to store frame data.</param>
/// <returns>Length of frame data retreived.</returns>
uint32_t Control::getFrame(uint8_t* data)
{
assert(data != NULL);
if (m_queue.isEmpty())
return 0U;
uint8_t len = 0U;
m_queue.getData(&len, 1U);
m_queue.getData(data, len);
return len;
}
/// <summary>
/// Updates the processor by the passed number of milliseconds.
/// </summary>
/// <param name="ms"></param>
void Control::clock(uint32_t ms)
{
if (m_network != NULL) {
processNetwork();
if (m_network->getStatus() == network::NET_STAT_RUNNING) {
m_siteData.setNetActive(true);
}
else {
m_siteData.setNetActive(false);
}
}
// if we have control enabled; do clocking to generate a CC data stream
if (m_control) {
if (m_ccRunning && !m_ccPacketInterval.isRunning()) {
m_ccPacketInterval.start();
}
if (m_ccHalted) {
if (!m_ccRunning) {
m_ccHalted = false;
m_ccPrevRunning = m_ccRunning;
}
}
else {
m_ccPacketInterval.clock(ms);
if (!m_ccPacketInterval.isRunning()) {
m_ccPacketInterval.start();
}
if (m_ccPacketInterval.isRunning() && m_ccPacketInterval.hasExpired()) {
if (m_ccRunning) {
writeRF_ControlData();
}
m_ccPacketInterval.start();
}
}
if (m_ccPrevRunning && !m_ccRunning) {
m_queue.clear();
m_ccPacketInterval.stop();
m_ccPrevRunning = m_ccRunning;
}
}
// handle timeouts and hang timers
m_rfTimeout.clock(ms);
m_netTimeout.clock(ms);
if (m_rfTGHang.isRunning()) {
m_rfTGHang.clock(ms);
if (m_rfTGHang.hasExpired()) {
m_rfTGHang.stop();
if (m_verbose) {
LogMessage(LOG_RF, "talkgroup hang has expired, lastDstId = %u", m_rfLastDstId);
}
m_rfLastDstId = 0U;
}
}
if (m_netState == RS_NET_AUDIO) {
m_networkWatchdog.clock(ms);
if (m_networkWatchdog.hasExpired()) {
if (m_netState == RS_NET_AUDIO) {
::ActivityLog("NXDN", false, "network watchdog has expired, %.1f seconds, %u%% packet loss",
float(m_voice->m_netFrames) / 50.0F, (m_voice->m_netLost * 100U) / m_voice->m_netFrames);
}
else {
::ActivityLog("NXDN", false, "network watchdog has expired");
}
m_networkWatchdog.stop();
if (m_control) {
m_affiliations.releaseGrant(m_netLC.getDstId(), false);
}
if (m_dedicatedControl) {
if (m_network != NULL)
m_network->resetNXDN();
}
m_netState = RS_NET_IDLE;
m_netTimeout.stop();
writeEndNet();
}
}
// reset states if we're in a rejected state
if (m_rfState == RS_RF_REJECTED) {
m_queue.clear();
m_voice->resetRF();
m_voice->resetNet();
m_data->resetRF();
if (m_network != NULL)
m_network->resetNXDN();
m_rfState = RS_RF_LISTENING;
}
// clock data and trunking
if (m_trunk != NULL) {
m_trunk->clock(ms);
}
}
/// <summary>
/// Flag indicating whether the process or is busy or not.
/// </summary>
/// <returns>True, if processor is busy, otherwise false.</returns>
bool Control::isBusy() const
{
return m_rfState != RS_RF_LISTENING || m_netState != RS_NET_IDLE;
}
/// <summary>
/// Helper to change the debug and verbose state.
/// </summary>
/// <param name="debug">Flag indicating whether NXDN debug is enabled.</param>
/// <param name="verbose">Flag indicating whether NXDN verbose logging is enabled.</param>
void Control::setDebugVerbose(bool debug, bool verbose)
{
m_debug = m_voice->m_debug = m_data->m_debug;
m_verbose = m_voice->m_verbose = m_data->m_verbose;
}
// ---------------------------------------------------------------------------
// Private Class Members
// ---------------------------------------------------------------------------
/// <summary>
/// Add data frame to the data ring buffer.
/// </summary>
/// <param name="data"></param>
/// <param name="length"></param>
/// <param name="net"></param>
void Control::addFrame(const uint8_t *data, uint32_t length, bool net)
{
assert(data != NULL);
if (!net) {
if (m_rfTimeout.isRunning() && m_rfTimeout.hasExpired())
return;
} else {
if (m_netTimeout.isRunning() && m_netTimeout.hasExpired())
return;
}
uint32_t space = m_queue.freeSpace();
if (space < (length + 1U)) {
if (!net) {
uint32_t queueLen = m_queue.length();
m_queue.resize(queueLen + NXDN_FRAME_LENGTH_BYTES);
LogError(LOG_NXDN, "overflow in the NXDN queue while writing data; queue free is %u, needed %u; resized was %u is %u", space, length, queueLen, m_queue.length());
return;
}
else {
LogError(LOG_NXDN, "overflow in the NXDN queue while writing network data; queue free is %u, needed %u", space, length);
return;
}
}
if (m_debug) {
Utils::symbols("!!! *Tx NXDN", data + 2U, length - 2U);
}
uint8_t len = length;
m_queue.addData(&len, 1U);
m_queue.addData(data, len);
}
/// <summary>
/// Process a data frames from the network.
/// </summary>
void Control::processNetwork()
{
if (m_rfState != RS_RF_LISTENING && m_netState == RS_NET_IDLE)
return;
lc::RTCH lc;
uint32_t length = 100U;
bool ret = false;
uint8_t* data = m_network->readNXDN(ret, lc, length);
if (!ret)
return;
if (length == 0U)
return;
if (data == NULL) {
m_network->resetNXDN();
return;
}
m_networkWatchdog.start();
if (m_debug) {
Utils::dump(2U, "!!! *NXDN Network Frame", data, length);
}
scrambler(data + 2U);
channel::LICH lich;
bool valid = lich.decode(data + 2U);
if (valid)
m_rfLastLICH = lich;
uint8_t usc = m_rfLastLICH.getFCT();
uint8_t option = m_rfLastLICH.getOption();
switch (usc) {
case NXDN_LICH_USC_UDCH:
ret = m_data->processNetwork(option, lc, data, length);
break;
default:
ret = m_voice->processNetwork(usc, option, lc, data, length);
break;
}
delete data;
}
/// <summary>
/// Helper to write control channel frame data.
/// </summary>
/// <returns></returns>
bool Control::writeRF_ControlData()
{
if (!m_control)
return false;
if (m_ccFrameCnt == 254U) {
m_ccFrameCnt = 0U;
}
// don't add any frames if the queue is full
uint8_t len = NXDN_FRAME_LENGTH_BYTES + 2U;
uint32_t space = m_queue.freeSpace();
if (space < (len + 1U)) {
return false;
}
const uint8_t maxSeq = 8U;
if (m_ccSeq == maxSeq) {
m_ccSeq = 0U;
}
if (m_netState == RS_NET_IDLE && m_rfState == RS_RF_LISTENING) {
m_trunk->writeRF_ControlData(m_ccFrameCnt, m_ccSeq, true);
m_ccSeq++;
if (m_ccSeq == maxSeq) {
m_ccFrameCnt++;
}
return true;
}
return false;
}
/// <summary>
/// Helper to write a Tx release packet.
/// </summary>
/// <param name="noNetwork"></param>
void Control::writeRF_Message_Tx_Rel(bool noNetwork)
{
uint8_t data[NXDN_FRAME_LENGTH_BYTES + 2U];
::memset(data + 2U, 0x00U, NXDN_FRAME_LENGTH_BYTES);
Sync::addNXDNSync(data + 2U);
// generate the LICH
channel::LICH lich;
lich.setRFCT(NXDN_LICH_RFCT_RTCH);
lich.setFCT(NXDN_LICH_USC_SACCH_NS);
lich.setOption(NXDN_LICH_STEAL_FACCH);
lich.setOutbound(true);
lich.encode(data + 2U);
uint8_t buffer[NXDN_RTCH_LC_LENGTH_BYTES];
::memset(buffer, 0x00U, NXDN_RTCH_LC_LENGTH_BYTES);
m_rfLC.setMessageType(RTCH_MESSAGE_TYPE_TX_REL);
m_rfLC.encode(buffer, NXDN_UDCH_LENGTH_BITS);
// generate the SACCH
channel::SACCH sacch;
sacch.setData(SACCH_IDLE);
sacch.setRAN(m_ran);
sacch.setStructure(NXDN_SR_SINGLE);
sacch.encode(data + 2U);
// generate the FACCH1
channel::FACCH1 facch;
facch.setData(buffer);
facch.encode(data + 2U, NXDN_FSW_LENGTH_BITS + NXDN_LICH_LENGTH_BITS + NXDN_SACCH_LENGTH_BITS);
facch.encode(data + 2U, NXDN_FSW_LENGTH_BITS + NXDN_LICH_LENGTH_BITS + NXDN_SACCH_LENGTH_BITS + NXDN_FACCH1_LENGTH_BITS);
data[0U] = modem::TAG_DATA;
data[1U] = 0x00U;
scrambler(data + 2U);
if (!noNetwork)
m_data->writeNetwork(data, NXDN_FRAME_LENGTH_BYTES + 2U);
if (m_duplex) {
addFrame(data, NXDN_FRAME_LENGTH_BYTES + 2U);
}
}
/// <summary>
/// Helper to write RF end of frame data.
/// </summary>
void Control::writeEndRF()
{
m_rfState = RS_RF_LISTENING;
m_rfMask = 0x00U;
m_rfLC.reset();
m_rfTimeout.stop();
//m_queue.clear();
if (m_network != NULL)
m_network->resetNXDN();
}
/// <summary>
/// Helper to write network end of frame data.
/// </summary>
void Control::writeEndNet()
{
m_netState = RS_NET_IDLE;
m_netMask = 0x00U;
m_netLC.reset();
m_netTimeout.stop();
m_networkWatchdog.stop();
if (m_network != NULL)
m_network->resetP25();
}
/// <summary>
///
/// </summary>
/// <param name="data"></param>
void Control::scrambler(uint8_t* data) const
{
assert(data != NULL);
if (m_debug) {
Utils::symbols("!!! *Tx NXDN (Unscrambled)", data, NXDN_FRAME_LENGTH_BYTES);
}
for (uint32_t i = 0U; i < NXDN_FRAME_LENGTH_BYTES; i++)
data[i] ^= SCRAMBLER[i];
}
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