Digital_Voice_Modem_Project
/
dvmhost
mirror of https://github.com/DVMProject/dvmhost.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
Branches Tags
${ item.name }
Create tag ${ searchTerm }
Create branch ${ searchTerm }
from '525ffd9471'
${ noResults }
dvmhost/p25/Control.cpp

894 lines
26 KiB
Raw Blame History

/**
* 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) 2016,2017,2018 by Jonathan Naylor G4KLX
* Copyright (C) 2017-2020 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 "p25/P25Defines.h"
#include "p25/Control.h"
#include "p25/acl/AccessControl.h"
#include "p25/P25Utils.h"
#include "p25/Sync.h"
#include "edac/CRC.h"
#include "HostMain.h"
#include "Log.h"
#include "Utils.h"
using namespace p25;
#include <cassert>
#include <cstdio>
#include <cstring>
#include <ctime>
// ---------------------------------------------------------------------------
// Constants
// ---------------------------------------------------------------------------
const uint8_t MAX_SYNC_BYTES_ERRS = 4U;
const uint32_t TSBK_PCH_CCH_CNT = 6U;
const uint32_t MAX_PREAMBLE_TDU_CNT = 64U;
// ---------------------------------------------------------------------------
// Public Class Members
// ---------------------------------------------------------------------------
/// <summary>
/// Initializes a new instance of the Control class.
/// </summary>
/// <param name="nac">P25 Network Access Code.</param>
/// <param name="callHang">Amount of hangtime for a P25 call.</param>
/// <param name="queueSize">Modem frame buffer queue size (bytes).</param>
/// <param name="modem">Instance of the Modem class.</param>
/// <param name="network">Instance of the BaseNetwork class.</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="ccBcstInterval">Control Channel Broadcast Interval.</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="dumpPDUData"></param>
/// <param name="repeatPDU"></param>
/// <param name="dumpTSBKData"></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 nac, uint32_t callHang, uint32_t queueSize, modem::Modem* modem, network::BaseNetwork* network,
uint32_t timeout, uint32_t tgHang, uint32_t ccBcstInterval, bool duplex, lookups::RadioIdLookup* ridLookup,
lookups::TalkgroupIdLookup* tidLookup, lookups::IdenTableLookup* idenTable, lookups::RSSIInterpolator* rssiMapper,
bool dumpPDUData, bool repeatPDU, bool dumpTSBKData, bool debug, bool verbose) :
m_voice(NULL),
m_data(NULL),
m_trunk(NULL),
m_nac(nac),
m_timeout(timeout),
m_modem(modem),
m_network(network),
m_inhibitIllegal(false),
m_legacyGroupGrnt(true),
m_legacyGroupReg(false),
m_duplex(duplex),
m_control(false),
m_continuousControl(false),
m_voiceOnControl(false),
m_ackTSBKRequests(true),
m_disableNetworkHDU(false),
m_idenTable(idenTable),
m_ridLookup(ridLookup),
m_tidLookup(tidLookup),
m_idenEntry(),
m_queue(queueSize, "P25 Control"),
m_rfState(RS_RF_LISTENING),
m_rfLastDstId(0U),
m_netState(RS_NET_IDLE),
m_netLastDstId(0U),
m_tailOnIdle(false),
m_ccOnIdle(false),
m_ccRunning(false),
m_ccBcstInterval(ccBcstInterval),
m_rfTimeout(1000U, timeout),
m_rfTGHang(1000U, tgHang),
m_netTimeout(1000U, timeout),
m_networkWatchdog(1000U, 0U, 1500U),
m_hangCount(3U * 8U),
m_tduPreambleCount(8U),
m_ccFrameCnt(0U),
m_ccSeq(0U),
m_nid(nac),
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_hangCount = callHang * 4U;
m_voice = new VoicePacket(this, network, debug, verbose);
m_data = new DataPacket(this, network, dumpPDUData, repeatPDU, debug, verbose);
m_trunk = new TrunkPacket(this, network, dumpTSBKData, debug, verbose);
}
/// <summary>
/// Finalizes a instance of the Control class.
/// </summary>
Control::~Control()
{
delete m_voice;
delete m_data;
delete m_trunk;
}
/// <summary>
/// Resets the data states for the RF interface.
/// </summary>
void Control::reset()
{
m_rfState = RS_RF_LISTENING;
m_voice->resetRF();
m_data->resetRF();
m_queue.clear();
}
/// <summary>
/// Helper to set P25 configuration options.
/// </summary>
/// <param name="conf">Instance of the ConfigINI class.</param>
/// <param name="cwCallsign"></param>
/// <param name="voiceChNo"></param>
/// <param name="pSuperGroup"></param>
/// <param name="netId"></param>
/// <param name="sysId"></param>
/// <param name="rfssId"></param>
/// <param name="siteId"></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,
uint32_t pSuperGroup, uint32_t netId, uint32_t sysId, uint8_t rfssId, uint8_t siteId, uint8_t channelId,
uint32_t channelNo, bool printOptions)
{
yaml::Node systemConf = conf["system"];
yaml::Node p25Protocol = conf["protocols"]["p25"];
m_tduPreambleCount = p25Protocol["tduPreambleCount"].as<uint32_t>(8U);
m_trunk->m_patchSuperGroup = pSuperGroup;
m_inhibitIllegal = p25Protocol["inhibitIllegal"].as<bool>(false);
m_legacyGroupGrnt = p25Protocol["legacyGroupGrnt"].as<bool>(true);
m_legacyGroupReg = p25Protocol["legacyGroupReg"].as<bool>(false);
m_trunk->m_verifyAff = p25Protocol["verifyAff"].as<bool>(false);
m_trunk->m_verifyReg = p25Protocol["verifyReg"].as<bool>(false);
m_trunk->m_noStatusAck = p25Protocol["noStatusAck"].as<bool>(false);
m_trunk->m_noMessageAck = p25Protocol["noMessageAck"].as<bool>(true);
yaml::Node control = p25Protocol["control"];
m_control = control["enable"].as<bool>(false);
if (m_control) {
m_continuousControl = control["continuous"].as<bool>(false);
}
else {
m_continuousControl = false;
}
m_voiceOnControl = p25Protocol["voiceOnControl"].as<bool>(false);
m_ackTSBKRequests = control["ackRequests"].as<bool>(true);
m_voice->m_silenceThreshold = p25Protocol["silenceThreshold"].as<uint32_t>(p25::DEFAULT_SILENCE_THRESHOLD);
m_disableNetworkHDU = p25Protocol["disableNetworkHDU"].as<bool>(false);
uint8_t serviceClass = P25_SVC_CLS_VOICE | P25_SVC_CLS_DATA;
if (m_control) {
serviceClass |= P25_SVC_CLS_REG;
}
if (m_voiceOnControl) {
serviceClass |= P25_SVC_CLS_COMPOSITE;
}
m_siteData = SiteData(netId, sysId, rfssId, siteId, 0U, channelId, channelNo, serviceClass);
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;
m_trunk->m_voiceChCnt = (uint8_t)availCh.size();
m_siteData.setChCnt((uint8_t)availCh.size());
for (auto it = availCh.begin(); it != availCh.end(); ++it) {
m_trunk->m_voiceChTable.push_back(*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(" Ack Requests: %s", m_ackTSBKRequests ? "yes" : "no");
}
LogInfo(" Disable Network HDUs: %s", m_disableNetworkHDU ? "yes" : "no");
LogInfo(" Inhibit Illegal: %s", m_inhibitIllegal ? "yes" : "no");
LogInfo(" Legacy Group Grant: %s", m_legacyGroupGrnt ? "yes" : "no");
LogInfo(" Legacy Group Registration: %s", m_legacyGroupReg ? "yes" : "no");
LogInfo(" Verify Affiliation: %s", m_trunk->m_verifyAff ? "yes" : "no");
LogInfo(" Verify Registration: %s", m_trunk->m_verifyReg ? "yes" : "no");
LogInfo(" No Status ACK: %s", m_trunk->m_noStatusAck ? "yes" : "no");
LogInfo(" No Message ACK: %s", m_trunk->m_noMessageAck ? "yes" : "no");
}
m_voice->resetRF();
m_voice->resetNet();
m_data->resetRF();
m_trunk->m_rfTSBK = lc::TSBK(m_siteData, m_idenEntry);
m_trunk->m_netTSBK = lc::TSBK(m_siteData, m_idenEntry);
}
/// <summary>
/// Sets a flag indicating whether the P25 control channel is running.
/// </summary>
/// <param name="ccRunning"></param>
void Control::setCCRunning(bool ccRunning)
{
m_ccRunning = ccRunning;
}
/// <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);
bool sync = data[1U] == 0x01U;
if (data[0U] == TAG_LOST && m_rfState == RS_RF_AUDIO) {
if (m_rssi != 0U) {
::ActivityLog("P25", true, "transmission lost, %.1f seconds, BER: %.1f%%, RSSI: -%u/-%u/-%u dBm",
float(m_voice->m_rfFrames) / 5.56F, float(m_voice->m_rfErrs * 100U) / float(m_voice->m_rfBits), m_minRSSI, m_maxRSSI, m_aveRSSI / m_rssiCount);
}
else {
::ActivityLog("P25", true, "transmission lost, %.1f seconds, BER: %.1f%%",
float(m_voice->m_rfFrames) / 5.56F, float(m_voice->m_rfErrs * 100U) / float(m_voice->m_rfBits));
}
LogMessage(LOG_RF, P25_TDU_STR ", 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_trunk->releaseDstIdGrant(m_voice->m_rfLC.getDstId(), false);
}
writeRF_TDU(false);
m_voice->m_lastDUID = P25_DUID_TDU;
m_voice->writeNetworkRF(data + 2U, P25_DUID_TDU);
m_rfState = RS_RF_LISTENING;
m_rfLastDstId = 0U;
m_rfTGHang.stop();
m_tailOnIdle = true;
m_rfTimeout.stop();
m_queue.clear();
if (m_network != NULL)
m_network->resetP25();
return false;
}
if (data[0U] == TAG_LOST && m_rfState == RS_RF_DATA) {
m_rfState = RS_RF_LISTENING;
m_rfLastDstId = 0U;
m_rfTGHang.stop();
m_tailOnIdle = true;
m_data->resetRF();
m_rfTimeout.stop();
m_queue.clear();
return false;
}
if (data[0U] == TAG_LOST) {
m_rfState = RS_RF_LISTENING;
m_voice->resetRF();
m_data->resetRF();
m_trunk->m_rfTSBK = lc::TSBK(m_siteData, m_idenEntry);
return false;
}
if (!sync && m_rfState == RS_RF_LISTENING) {
uint8_t syncBytes[P25_SYNC_LENGTH_BYTES];
::memcpy(syncBytes, data + 2U, P25_SYNC_LENGTH_BYTES);
uint8_t errs = 0U;
for (uint8_t i = 0U; i < P25_SYNC_LENGTH_BYTES; i++)
errs += Utils::countBits8(syncBytes[i] ^ P25_SYNC_BYTES[i]);
if (errs >= MAX_SYNC_BYTES_ERRS) {
LogWarning(LOG_RF, "P25, possible sync word rejected, errs = %u, sync word = %02X %02X %02X %02X %02X %02X", errs,
syncBytes[0U], syncBytes[1U], syncBytes[2U], syncBytes[3U], syncBytes[4U], syncBytes[5U]);
return false;
}
else {
LogWarning(LOG_RF, "P25, possible sync word, errs = %u, sync word = %02X %02X %02X %02X %02X %02X", errs,
syncBytes[0U], syncBytes[1U], syncBytes[2U], syncBytes[3U], syncBytes[4U], syncBytes[5U]);
sync = true; // we found a completly valid sync with no errors...
}
}
if (sync && m_debug) {
Utils::symbols("!!! *Rx P25", data + 2U, len - 2U);
}
// Decode the NID
bool valid = m_nid.decode(data + 2U);
if (!valid && m_rfState == RS_RF_LISTENING)
return false;
uint8_t duid = m_nid.getDUID();
// 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 (m_verbose) {
LogMessage(LOG_RF, "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 (m_debug) {
LogDebug(LOG_RF, "P25, rfState = %u, netState = %u, DUID = %u, lastDUID = %u", m_rfState, m_netState, duid, m_voice->m_lastDUID);
}
// are we interrupting a running CC?
if (m_ccRunning) {
if (duid != P25_DUID_TSDU) {
g_interruptP25Control = true;
}
}
bool ret = false;
// handle individual DUIDs
switch (duid) {
case P25_DUID_HDU:
case P25_DUID_LDU1:
case P25_DUID_LDU2:
ret = m_voice->process(data, len);
break;
case P25_DUID_TDU:
case P25_DUID_TDULC:
ret = m_voice->process(data, len);
break;
case P25_DUID_PDU:
ret = m_data->process(data, len);
break;
case P25_DUID_TSDU:
ret = m_trunk->process(data, len);
break;
default:
LogError(LOG_RF, "P25 unhandled DUID, duid = $%02X", duid);
return false;
}
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>
/// Helper to write P25 adjacent site information to the network.
/// </summary>
void Control::writeAdjSSNetwork()
{
m_trunk->writeAdjSSNetwork();
}
/// <summary>
/// Helper to write control channel frame data.
/// </summary>
/// <returns></returns>
bool Control::writeControlRF()
{
if (!m_control) {
return false;
}
if (m_ccSeq == 6U) {
m_ccSeq = 0U;
}
if (m_ccFrameCnt == 254U) {
m_ccFrameCnt = 0U;
}
if (m_netState == RS_NET_IDLE && m_rfState == RS_RF_LISTENING) {
m_trunk->writeRF_ControlData(m_ccFrameCnt, m_ccSeq, true);
m_ccFrameCnt++;
m_ccSeq++;
return true;
}
return false;
}
/// <summary>
/// Helper to write end of control channel frame data.
/// </summary>
/// <returns></returns>
bool Control::writeControlEndRF()
{
if (!m_control) {
return false;
}
if (m_netState == RS_NET_IDLE && m_rfState == RS_RF_LISTENING) {
for (uint32_t i = 0; i < TSBK_PCH_CCH_CNT; i++) {
m_trunk->queueRF_TSBK_Ctrl_MBF(TSBK_OSP_MOT_PSH_CCH);
}
writeRF_Nulls();
return true;
}
return false;
}
/// <summary>
/// Helper to write end of frame data.
/// </summary>
/// <returns></returns>
bool Control::writeEndRF()
{
if (m_netState == RS_NET_IDLE && m_rfState == RS_RF_LISTENING) {
if (m_tailOnIdle) {
bool ret = m_voice->writeEndRF();
if (!m_control) {
writeRF_Nulls();
}
return ret;
}
if (m_ccOnIdle) {
g_fireP25Control = true;
m_ccOnIdle = false;
}
}
return false;
}
/// <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);
}
}
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_netState == RS_NET_DATA) {
m_networkWatchdog.clock(ms);
if (m_networkWatchdog.hasExpired()) {
if (m_netState == RS_NET_AUDIO) {
::ActivityLog("P25", 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("P25", false, "network watchdog has expired");
}
m_networkWatchdog.stop();
if (m_control) {
m_trunk->releaseDstIdGrant(m_voice->m_netLC.getDstId(), false);
}
if (m_continuousControl) {
if (m_network != NULL)
m_network->resetP25();
}
m_netState = RS_NET_IDLE;
m_tailOnIdle = true;
m_voice->resetNet();
m_trunk->m_netTSBK = lc::TSBK(m_siteData, m_idenEntry);
m_netTimeout.stop();
}
}
if (m_rfState == RS_RF_REJECTED) {
m_queue.clear();
m_voice->resetRF();
m_voice->resetNet();
m_data->resetRF();
m_trunk->m_rfTSBK = lc::TSBK(m_siteData, m_idenEntry);
m_trunk->m_netTSBK = lc::TSBK(m_siteData, m_idenEntry);
if (m_network != NULL)
m_network->resetP25();
m_rfState = RS_RF_LISTENING;
}
m_trunk->clock(ms);
// if the states are "idle" ensure LC data isn't being held in memory
if (m_rfState == RS_RF_LISTENING && m_netState == RS_NET_IDLE) {
m_voice->resetRF();
m_voice->resetNet();
m_data->resetRF();
m_trunk->m_rfTSBK = lc::TSBK(m_siteData, m_idenEntry);
m_trunk->m_netTSBK = lc::TSBK(m_siteData, m_idenEntry);
}
}
/// <summary>
/// Helper to change the debug and verbose state.
/// </summary>
/// <param name="debug">Flag indicating whether DMR debug is enabled.</param>
/// <param name="verbose">Flag indicating whether DMR verbose logging is enabled.</param>
void Control::setDebugVerbose(bool debug, bool verbose)
{
m_debug = m_voice->m_debug = m_data->m_debug = m_trunk->m_debug = debug;
m_verbose = m_voice->m_verbose = m_data->m_verbose = m_trunk->m_verbose = verbose;
}
// ---------------------------------------------------------------------------
// Private Class Members
// ---------------------------------------------------------------------------
/// <summary>
/// Write data processed from RF to the data ring buffer.
/// </summary>
/// <param name="data"></param>
/// <param name="length"></param>
void Control::writeQueueRF(const uint8_t* data, uint32_t length)
{
assert(data != NULL);
if (m_rfTimeout.isRunning() && m_rfTimeout.hasExpired())
return;
uint32_t space = m_queue.freeSpace();
if (space < (length + 1U)) {
uint32_t queueLen = m_queue.length();
m_queue.resize(queueLen + QUEUE_RESIZE_SIZE);
LogError(LOG_P25, "overflow in the P25 RF queue; queue resized was %u is %u", queueLen, m_queue.length());
return;
}
if (m_debug) {
Utils::symbols("!!! *Tx P25", data + 2U, length - 2U);
}
uint8_t len = length;
m_queue.addData(&len, 1U);
m_queue.addData(data, len);
}
/// <summary>
/// Write data processed from the network to the data ring buffer.
/// </summary>
/// <param name="data"></param>
/// <param name="length"></param>
void Control::writeQueueNet(const uint8_t* data, uint32_t length)
{
assert(data != NULL);
if (m_netTimeout.isRunning() && m_netTimeout.hasExpired())
return;
uint32_t space = m_queue.freeSpace();
if (space < (length + 1U)) {
LogError(LOG_P25, "network overflow in the P25 RF queue");
return;
}
if (m_debug) {
Utils::symbols("!!! *Tx P25", 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::LC control;
data::LowSpeedData lsd;
uint8_t duid;
uint32_t length = 100U;
bool ret = false;
uint8_t* data = m_network->readP25(ret, control, lsd, duid, length);
if (!ret)
return;
if (length == 0U)
return;
if (data == NULL) {
m_network->resetP25();
return;
}
m_networkWatchdog.start();
if (m_debug) {
Utils::dump(2U, "!!! *P25 Network Frame", data, length);
}
switch (duid) {
case P25_DUID_HDU:
case P25_DUID_LDU1:
case P25_DUID_LDU2:
case P25_DUID_TDU:
case P25_DUID_TDULC:
m_voice->processNetwork(data, length, control, lsd, duid);
break;
case P25_DUID_PDU:
m_data->processNetwork(data, length, control, lsd, duid);
break;
case P25_DUID_TSDU:
m_trunk->processNetwork(data, length, control, lsd, duid);
break;
}
delete data;
}
/// <summary>
/// Helper to write data nulls.
/// </summary>
void Control::writeRF_Nulls()
{
const uint8_t NULLS_LENGTH_BYTES = 25U;
// write null bits (0x00)
uint8_t data[NULLS_LENGTH_BYTES + 2U];
::memset(data + 2U, 0x00U, NULLS_LENGTH_BYTES);
data[0U] = TAG_EOT;
data[1U] = 0x00U;
writeQueueRF(data, NULLS_LENGTH_BYTES + 2U);
}
/// <summary>
/// Helper to write TDU preamble packet burst.
/// </summary>
void Control::writeRF_Preamble()
{
if (m_modem->hasTX() || m_tduPreambleCount == 0U) {
return;
}
if (m_ccRunning) {
return;
}
if (m_tduPreambleCount > MAX_PREAMBLE_TDU_CNT) {
LogWarning(LOG_P25, "oversized TDU preamble count, reducing to maximum %u", MAX_PREAMBLE_TDU_CNT);
m_tduPreambleCount = MAX_PREAMBLE_TDU_CNT;
}
// write TDUs if requested
for (uint8_t i = 0U; i < m_tduPreambleCount; i++) {
writeRF_TDU(true);
}
}
/// <summary>
/// Helper to write a P25 TDU packet.
/// </summary>
/// <param name="noNetwork"></param>
void Control::writeRF_TDU(bool noNetwork)
{
uint8_t data[P25_TDU_FRAME_LENGTH_BYTES + 2U];
::memset(data + 2U, 0x00U, P25_TDU_FRAME_LENGTH_BYTES);
// Generate Sync
Sync::addP25Sync(data + 2U);
// Generate NID
m_nid.encode(data + 2U, P25_DUID_TDU);
// Add busy bits
addBusyBits(data + 2U, P25_TDU_FRAME_LENGTH_BITS, true, true);
if (!noNetwork)
m_voice->writeNetworkRF(data + 2U, P25_DUID_TDU);
if (m_duplex) {
data[0U] = TAG_EOT;
data[1U] = 0x00U;
writeQueueRF(data, P25_TDU_FRAME_LENGTH_BYTES + 2U);
}
}
/// <summary>
/// Helper to set the busy status bits on P25 frame data.
/// </summary>
/// <param name="data"></param>
/// <param name="ssOffset"></param>
/// <param name="b1"></param>
/// <param name="b2"></param>
void Control::setBusyBits(uint8_t* data, uint32_t ssOffset, bool b1, bool b2)
{
assert(data != NULL);
WRITE_BIT(data, ssOffset, b1);
WRITE_BIT(data, ssOffset + 1U, b2);
}
/// <summary>
/// Helper to add the busy status bits on P25 frame data.
/// </summary>
/// <param name="data"></param>
/// <param name="length"></param>
/// <param name="b1"></param>
/// <param name="b2"></param>
void Control::addBusyBits(uint8_t* data, uint32_t length, bool b1, bool b2)
{
assert(data != NULL);
// insert the "10" (Unknown, use for inbound or outbound) status bits
for (uint32_t ss0Pos = P25_SS0_START; ss0Pos < length; ss0Pos += P25_SS_INCREMENT) {
uint32_t ss1Pos = ss0Pos + 1U;
WRITE_BIT(data, ss0Pos, true); // 1
WRITE_BIT(data, ss1Pos, false); // 0
}
// interleave the requested status bits (every other)
for (uint32_t ss0Pos = P25_SS0_START; ss0Pos < length; ss0Pos += (P25_SS_INCREMENT * 2)) {
uint32_t ss1Pos = ss0Pos + 1U;
WRITE_BIT(data, ss0Pos, b1);
WRITE_BIT(data, ss1Pos, b2);
}
}
Reference in new issue View Git Blame Copy Permalink

Powered by TurnKey Linux.