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543 lines
20 KiB
543 lines
20 KiB
/**
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* Digital Voice Modem - Host Software
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* GPLv2 Open Source. Use is subject to license terms.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* @package DVM / Host Software
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*
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*/
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//
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// Based on code from the MMDVMHost project. (https://github.com/g4klx/MMDVMHost)
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// Licensed under the GPLv2 License (https://opensource.org/licenses/GPL-2.0)
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//
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/*
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* Copyright (C) 2015,2016,2017,2018 Jonathan Naylor, G4KLX
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* Copyright (C) 2017-2020 by Bryan Biedenkapp N2PLL
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include "Defines.h"
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#include "dmr/DataPacket.h"
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#include "dmr/acl/AccessControl.h"
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#include "dmr/data/DataHeader.h"
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#include "dmr/data/EMB.h"
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#include "dmr/edac/Trellis.h"
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#include "dmr/lc/ShortLC.h"
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#include "dmr/lc/FullLC.h"
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#include "dmr/lc/CSBK.h"
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#include "dmr/SlotType.h"
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#include "dmr/Sync.h"
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#include "edac/BPTC19696.h"
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#include "edac/CRC.h"
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#include "Log.h"
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#include "Utils.h"
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using namespace dmr;
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#include <cassert>
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#include <ctime>
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#include <algorithm>
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#include <cmath>
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// ---------------------------------------------------------------------------
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// Macros
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// ---------------------------------------------------------------------------
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// Don't process RF frames if the network isn't in a idle state.
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#define CHECK_TRAFFIC_COLLISION(_DST_ID) \
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if (m_slot->m_netState != RS_NET_IDLE && _DST_ID == m_slot->m_netLastDstId) { \
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LogWarning(LOG_RF, "DMR Slot %u, Traffic collision detect, preempting new RF traffic to existing network traffic!", m_slot->m_slotNo); \
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return false; \
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}
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#define CHECK_TRAFFIC_COLLISION_DELLC(_DST_ID) \
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if (m_slot->m_netState != RS_NET_IDLE && _DST_ID == m_slot->m_netLastDstId) { \
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LogWarning(LOG_RF, "DMR Slot %u, Traffic collision detect, preempting new RF traffic to existing network traffic!", m_slot->m_slotNo); \
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delete lc; \
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return false; \
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}
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#define CHECK_TG_HANG(_DST_ID) \
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if (m_slot->m_rfLastDstId != 0U) { \
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if (m_slot->m_rfLastDstId != _DST_ID && (m_slot->m_rfTGHang.isRunning() && !m_slot->m_rfTGHang.hasExpired())) { \
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return; \
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} \
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}
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#define CHECK_TG_HANG_DELLC(_DST_ID) \
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if (m_slot->m_rfLastDstId != 0U) { \
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if (m_slot->m_rfLastDstId != _DST_ID && (m_slot->m_rfTGHang.isRunning() && !m_slot->m_rfTGHang.hasExpired())) { \
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delete lc; \
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return; \
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} \
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}
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// ---------------------------------------------------------------------------
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// Public Class Members
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// ---------------------------------------------------------------------------
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/// <summary>
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/// Process DMR data frame from the RF interface.
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/// </summary>
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/// <param name="data">Buffer containing data frame.</param>
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/// <param name="len">Length of data frame.</param>
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/// <returns></returns>
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bool DataPacket::process(uint8_t* data, uint32_t len)
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{
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assert(data != NULL);
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// Get the type from the packet metadata
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uint8_t dataType = data[1U] & 0x0FU;
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SlotType slotType;
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slotType.setColorCode(m_slot->m_colorCode);
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slotType.setDataType(dataType);
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if (dataType == DT_TERMINATOR_WITH_LC) {
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if (m_slot->m_rfState != RS_RF_AUDIO)
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return false;
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// Regenerate the LC data
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lc::FullLC fullLC;
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fullLC.encode(*m_slot->m_rfLC, data + 2U, DT_TERMINATOR_WITH_LC);
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// Regenerate the Slot Type
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slotType.encode(data + 2U);
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// Convert the Data Sync to be from the BS or MS as needed
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Sync::addDMRDataSync(data + 2U, m_slot->m_duplex);
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if (!m_slot->m_rfTimeout) {
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data[0U] = TAG_EOT;
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data[1U] = 0x00U;
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m_slot->writeNetworkRF(data, DT_TERMINATOR_WITH_LC);
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if (m_slot->m_duplex) {
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for (uint32_t i = 0U; i < m_slot->m_hangCount; i++)
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m_slot->writeQueueRF(data);
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}
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}
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if (m_verbose) {
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LogMessage(LOG_RF, DMR_DT_TERMINATOR_WITH_LC ", slot = %u, dstId = %u", m_slot->m_slotNo, m_slot->m_rfLC->getDstId());
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}
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if (m_slot->m_rssi != 0U) {
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::ActivityLog("DMR", true, "Slot %u RF end of voice transmission, %.1f seconds, BER: %.1f%%, RSSI: -%u/-%u/-%u dBm",
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m_slot->m_slotNo, float(m_slot->m_rfFrames) / 16.667F, float(m_slot->m_rfErrs * 100U) / float(m_slot->m_rfBits),
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m_slot->m_minRSSI, m_slot->m_maxRSSI, m_slot->m_aveRSSI / m_slot->m_rssiCount);
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}
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else {
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::ActivityLog("DMR", true, "Slot %u RF end of voice transmission, %.1f seconds, BER: %.1f%%",
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m_slot->m_slotNo, float(m_slot->m_rfFrames) / 16.667F, float(m_slot->m_rfErrs * 100U) / float(m_slot->m_rfBits));
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}
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LogMessage(LOG_RF, "DMR Slot %u, total frames: %d, total bits: %d, errors: %d, BER: %.4f%%",
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m_slot->m_slotNo, m_slot->m_rfFrames, m_slot->m_rfBits, m_slot->m_rfErrs, float(m_slot->m_rfErrs * 100U) / float(m_slot->m_rfBits));
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if (m_slot->m_rfTimeout) {
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m_slot->writeEndRF();
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return false;
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}
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else {
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m_slot->writeEndRF();
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return true;
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}
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}
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else if (dataType == DT_DATA_HEADER) {
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if (m_slot->m_rfState == RS_RF_DATA)
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return true;
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data::DataHeader dataHeader;
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bool valid = dataHeader.decode(data + 2U);
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if (!valid)
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return false;
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bool gi = dataHeader.getGI();
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uint32_t srcId = dataHeader.getSrcId();
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uint32_t dstId = dataHeader.getDstId();
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CHECK_TRAFFIC_COLLISION(dstId);
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// validate the source RID
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if (!acl::AccessControl::validateSrcId(srcId)) {
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LogWarning(LOG_RF, "DMR Slot %u, DT_DATA_HEADER denial, RID rejection, srcId = %u", m_slot->m_slotNo, srcId);
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return false;
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}
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// validate the target ID
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if (gi) {
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if (!acl::AccessControl::validateTGId(m_slot->m_slotNo, dstId)) {
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LogWarning(LOG_RF, "DMR Slot %u, DT_DATA_HEADER denial, TGID rejection, srcId = %u, dstId = %u", m_slot->m_slotNo, srcId, dstId);
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return false;
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}
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}
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m_slot->m_rfFrames = dataHeader.getBlocks();
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m_slot->m_rfSeqNo = 0U;
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m_slot->m_rfLC = new lc::LC(gi ? FLCO_GROUP : FLCO_PRIVATE, srcId, dstId);
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// Regenerate the data header
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dataHeader.encode(data + 2U);
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// Regenerate the Slot Type
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slotType.encode(data + 2U);
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// Convert the Data Sync to be from the BS or MS as needed
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Sync::addDMRDataSync(data + 2U, m_slot->m_duplex);
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data[0U] = m_slot->m_rfFrames == 0U ? TAG_EOT : TAG_DATA;
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data[1U] = 0x00U;
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if (m_slot->m_duplex && m_repeatDataPacket)
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m_slot->writeQueueRF(data);
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m_slot->writeNetworkRF(data, DT_DATA_HEADER);
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m_slot->m_rfState = RS_RF_DATA;
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m_slot->m_rfLastDstId = dstId;
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if (m_slot->m_netState == RS_NET_IDLE) {
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m_slot->setShortLC(m_slot->m_slotNo, dstId, gi ? FLCO_GROUP : FLCO_PRIVATE, false);
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}
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if (m_verbose) {
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LogMessage(LOG_RF, DMR_DT_DATA_HEADER ", slot = %u, dpf = $%02X, sap = $%02X, fullMessage = %u, blocksToFollow = %u, padCount = %u, seqNo = %u, dstId = %u, srcId = %u, group = %u",
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m_slot->m_slotNo, dataHeader.getDPF(), dataHeader.getSAP(), dataHeader.getFullMesage(), dataHeader.getBlocks(), dataHeader.getPadCount(), dataHeader.getFSN(),
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dstId, srcId, gi);
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}
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::ActivityLog("DMR", true, "Slot %u RF data header from %u to %s%u, %u blocks", m_slot->m_slotNo, srcId, gi ? "TG " : "", dstId, m_slot->m_rfFrames);
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::memset(m_pduUserData, 0x00U, DMR_MAX_PDU_COUNT * DMR_MAX_PDU_LENGTH + 2U);
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m_pduDataOffset = 0U;
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if (m_slot->m_rfFrames == 0U) {
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::ActivityLog("DMR", true, "Slot %u ended RF data transmission", m_slot->m_slotNo);
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m_slot->writeEndRF();
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}
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return true;
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}
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else if (dataType == DT_RATE_12_DATA || dataType == DT_RATE_34_DATA || dataType == DT_RATE_1_DATA) {
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if (m_slot->m_rfState != RS_RF_DATA || m_slot->m_rfFrames == 0U)
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return false;
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edac::BPTC19696 bptc;
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edac::Trellis trellis;
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// decode the rate 1/2 payload
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if (dataType == DT_RATE_12_DATA) {
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// decode the BPTC (196,96) FEC
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uint8_t payload[12U];
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bptc.decode(data + 2U, payload);
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// store payload
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::memcpy(m_pduUserData, payload, 12U);
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m_pduDataOffset += 12U;
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// encode the BPTC (196,96) FEC
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bptc.encode(payload, data + 2U);
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}
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else if (dataType == DT_RATE_34_DATA) {
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// decode the Trellis 3/4 rate FEC
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uint8_t payload[18U];
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bool ret = trellis.decode(data + 2U, payload);
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if (ret) {
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// store payload
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::memcpy(m_pduUserData, payload, 18U);
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// encode the Trellis 3/4 rate FEC
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trellis.encode(payload, data + 2U);
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}
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else {
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LogWarning(LOG_RF, "DMR Slot %u, DT_RATE_34_DATA, unfixable RF rate 3/4 data", m_slot->m_slotNo);
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Utils::dump(1U, "Unfixable PDU Data", data + 2U, DMR_FRAME_LENGTH_BYTES);
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}
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m_pduDataOffset += 18U;
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}
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m_slot->m_rfFrames--;
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data[0U] = m_slot->m_rfFrames == 0U ? TAG_EOT : TAG_DATA;
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data[1U] = 0x00U;
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// regenerate the Slot Type
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slotType.encode(data + 2U);
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// convert the Data Sync to be from the BS or MS as needed
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Sync::addDMRDataSync(data + 2U, m_slot->m_duplex);
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m_slot->writeNetworkRF(data, dataType);
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if (m_slot->m_duplex && m_repeatDataPacket) {
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m_slot->writeQueueRF(data);
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}
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if (m_slot->m_rfFrames == 0U) {
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if (m_dumpDataPacket) {
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Utils::dump(1U, "PDU Packet", m_pduUserData, m_pduDataOffset);
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}
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LogMessage(LOG_RF, "DMR Slot %u, DT_RATE_12/34_DATA, ended data transmission", m_slot->m_slotNo);
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m_slot->writeEndRF();
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}
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if (m_verbose) {
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if (dataType == DT_RATE_12_DATA) {
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LogMessage(LOG_RF, DMR_DT_RATE_12_DATA ", block = %u", m_slot->m_rfFrames + 1);
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}
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else if (dataType == DT_RATE_34_DATA) {
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LogMessage(LOG_RF, DMR_DT_RATE_34_DATA ", block = %u", m_slot->m_rfFrames + 1);
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}
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else {
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LogMessage(LOG_RF, DMR_DT_RATE_1_DATA ", block = %u", m_slot->m_rfFrames + 1);
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}
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}
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return true;
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}
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return false;
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}
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/// <summary>
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/// Process a data frame from the network.
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/// </summary>
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/// <param name="dmrData"></param>
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void DataPacket::processNetwork(const data::Data& dmrData)
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{
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uint8_t dataType = dmrData.getDataType();
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uint8_t data[DMR_FRAME_LENGTH_BYTES + 2U];
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dmrData.getData(data + 2U);
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if (dataType == DT_TERMINATOR_WITH_LC) {
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if (m_slot->m_netState != RS_NET_AUDIO)
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return;
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// Regenerate the LC data
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lc::FullLC fullLC;
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fullLC.encode(*m_slot->m_netLC, data + 2U, DT_TERMINATOR_WITH_LC);
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// Regenerate the Slot Type
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SlotType slotType;
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slotType.setColorCode(m_slot->m_colorCode);
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slotType.setDataType(DT_TERMINATOR_WITH_LC);
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slotType.encode(data + 2U);
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// Convert the Data Sync to be from the BS or MS as needed
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Sync::addDMRDataSync(data + 2U, m_slot->m_duplex);
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if (!m_slot->m_netTimeout) {
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data[0U] = TAG_EOT;
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data[1U] = 0x00U;
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if (m_slot->m_duplex) {
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for (uint32_t i = 0U; i < m_slot->m_hangCount; i++)
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m_slot->writeQueueNet(data);
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}
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else {
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for (uint32_t i = 0U; i < 3U; i++)
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m_slot->writeQueueNet(data);
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}
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}
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if (m_verbose) {
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LogMessage(LOG_RF, DMR_DT_TERMINATOR_WITH_LC ", slot = %u, dstId = %u", m_slot->m_slotNo, m_slot->m_netLC->getDstId());
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}
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// We've received the voice header and terminator haven't we?
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m_slot->m_netFrames += 2U;
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::ActivityLog("DMR", false, "Slot %u network end of voice transmission, %.1f seconds, %u%% packet loss, BER: %.1f%%",
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m_slot->m_slotNo, float(m_slot->m_netFrames) / 16.667F, (m_slot->m_netLost * 100U) / m_slot->m_netFrames, float(m_slot->m_netErrs * 100U) / float(m_slot->m_netBits));
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m_slot->writeEndNet();
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}
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else if (dataType == DT_DATA_HEADER) {
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if (m_slot->m_netState == RS_NET_DATA)
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return;
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data::DataHeader dataHeader;
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bool valid = dataHeader.decode(data + 2U);
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if (!valid) {
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LogError(LOG_NET, "DMR Slot %u, DT_DATA_HEADER, unable to decode the network data header", m_slot->m_slotNo);
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return;
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}
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bool gi = dataHeader.getGI();
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uint32_t srcId = dataHeader.getSrcId();
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uint32_t dstId = dataHeader.getDstId();
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CHECK_TG_HANG(dstId);
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m_slot->m_netFrames = dataHeader.getBlocks();
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// Regenerate the data header
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dataHeader.encode(data + 2U);
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// Regenerate the Slot Type
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SlotType slotType;
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slotType.setColorCode(m_slot->m_colorCode);
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slotType.setDataType(DT_DATA_HEADER);
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slotType.encode(data + 2U);
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// Convert the Data Sync to be from the BS or MS as needed
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Sync::addDMRDataSync(data + 2U, m_slot->m_duplex);
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data[0U] = m_slot->m_netFrames == 0U ? TAG_EOT : TAG_DATA;
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data[1U] = 0x00U;
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// Put a small delay into starting transmission
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m_slot->writeQueueNet(m_slot->m_idle);
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m_slot->writeQueueNet(m_slot->m_idle);
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m_slot->writeQueueNet(data);
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m_slot->m_netState = RS_NET_DATA;
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m_slot->m_netLastDstId = dstId;
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m_slot->setShortLC(m_slot->m_slotNo, dstId, gi ? FLCO_GROUP : FLCO_PRIVATE, false);
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if (m_verbose) {
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LogMessage(LOG_RF, DMR_DT_DATA_HEADER ", slot = %u, dstId = %u, srcId = %u, group = %u, blocks = %u", m_slot->m_slotNo, m_slot->m_rfLC->getDstId(), m_slot->m_rfLC->getSrcId(),
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m_slot->m_rfLC->getFLCO() == FLCO_GROUP, dataHeader.getBlocks());
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}
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::ActivityLog("DMR", false, "Slot %u network data header from %u to %s%u, %u blocks",
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m_slot->m_slotNo, srcId, gi ? "TG " : "", dstId, m_slot->m_netFrames);
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::memset(m_pduUserData, 0x00U, DMR_MAX_PDU_COUNT * DMR_MAX_PDU_LENGTH + 2U);
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m_pduDataOffset = 0U;
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if (m_slot->m_netFrames == 0U) {
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::ActivityLog("DMR", false, "Slot %u ended network data transmission", m_slot->m_slotNo);
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m_slot->writeEndNet();
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}
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}
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else if (dataType == DT_RATE_12_DATA || dataType == DT_RATE_34_DATA || dataType == DT_RATE_1_DATA) {
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if (m_slot->m_netState != RS_NET_DATA || m_slot->m_netFrames == 0U) {
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m_slot->writeEndNet();
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return;
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}
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// regenerate the rate 1/2 payload
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if (dataType == DT_RATE_12_DATA) {
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// decode the BPTC (196,96) FEC
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edac::BPTC19696 bptc;
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uint8_t payload[12U];
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bptc.decode(data + 2U, payload);
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// store payload
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::memcpy(m_pduUserData, payload, 12U);
|
|
m_pduDataOffset += 12U;
|
|
|
|
// encode the BPTC (196,96) FEC
|
|
bptc.encode(payload, data + 2U);
|
|
}
|
|
else if (dataType == DT_RATE_34_DATA) {
|
|
// decode the Trellis 3/4 rate FEC
|
|
edac::Trellis trellis;
|
|
uint8_t payload[18U];
|
|
bool ret = trellis.decode(data + 2U, payload);
|
|
if (ret) {
|
|
// store payload
|
|
::memcpy(m_pduUserData, payload, 18U);
|
|
|
|
// encode the Trellis 3/4 rate FEC
|
|
trellis.encode(payload, data + 2U);
|
|
}
|
|
else {
|
|
LogWarning(LOG_NET, "DMR Slot %u, DT_RATE_34_DATA, unfixable network rate 3/4 data", m_slot->m_slotNo);
|
|
Utils::dump(1U, "Data", data + 2U, DMR_FRAME_LENGTH_BYTES);
|
|
}
|
|
|
|
m_pduDataOffset += 18U;
|
|
}
|
|
|
|
m_slot->m_netFrames--;
|
|
|
|
if (m_repeatDataPacket) {
|
|
// regenerate the Slot Type
|
|
SlotType slotType;
|
|
slotType.decode(data + 2U);
|
|
slotType.setColorCode(m_slot->m_colorCode);
|
|
slotType.encode(data + 2U);
|
|
|
|
// convert the Data Sync to be from the BS or MS as needed
|
|
Sync::addDMRDataSync(data + 2U, m_slot->m_duplex);
|
|
|
|
data[0U] = m_slot->m_netFrames == 0U ? TAG_EOT : TAG_DATA;
|
|
data[1U] = 0x00U;
|
|
|
|
m_slot->writeQueueNet(data);
|
|
|
|
if (m_verbose) {
|
|
if (dataType == DT_RATE_12_DATA) {
|
|
LogMessage(LOG_RF, DMR_DT_RATE_12_DATA ", block = %u", m_slot->m_netFrames + 1);
|
|
}
|
|
else if (dataType == DT_RATE_34_DATA) {
|
|
LogMessage(LOG_RF, DMR_DT_RATE_34_DATA ", block = %u", m_slot->m_netFrames + 1);
|
|
}
|
|
else {
|
|
LogMessage(LOG_RF, DMR_DT_RATE_1_DATA ", block = %u", m_slot->m_netFrames + 1);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (m_slot->m_netFrames == 0U) {
|
|
if (m_dumpDataPacket) {
|
|
Utils::dump(1U, "PDU Packet", m_pduUserData, m_pduDataOffset);
|
|
}
|
|
|
|
LogMessage(LOG_NET, "DMR Slot %u, DT_RATE_12/34_DATA, ended data transmission", m_slot->m_slotNo);
|
|
m_slot->writeEndNet();
|
|
}
|
|
}
|
|
else {
|
|
// Unhandled data type
|
|
LogWarning(LOG_NET, "DMR Slot %u, unhandled network data, type = $%02X", m_slot->m_slotNo, dataType);
|
|
}
|
|
}
|
|
|
|
// ---------------------------------------------------------------------------
|
|
// Private Class Members
|
|
// ---------------------------------------------------------------------------
|
|
/// <summary>
|
|
/// Initializes a new instance of the DataPacket class.
|
|
/// </summary>
|
|
/// <param name="slot">DMR slot.</param>
|
|
/// <param name="network">Instance of the BaseNetwork class.</param>
|
|
/// <param name="dumpDataPacket"></param>
|
|
/// <param name="repeatDataPacket"></param>
|
|
/// <param name="debug">Flag indicating whether DMR debug is enabled.</param>
|
|
/// <param name="verbose">Flag indicating whether DMR verbose logging is enabled.</param>
|
|
DataPacket::DataPacket(Slot* slot, network::BaseNetwork* network, bool dumpDataPacket, bool repeatDataPacket, bool debug, bool verbose) :
|
|
m_slot(slot),
|
|
m_pduUserData(NULL),
|
|
m_pduDataOffset(0U),
|
|
m_lastRejectId(0U),
|
|
m_dumpDataPacket(dumpDataPacket),
|
|
m_repeatDataPacket(repeatDataPacket),
|
|
m_verbose(verbose),
|
|
m_debug(debug)
|
|
{
|
|
m_pduUserData = new uint8_t[DMR_MAX_PDU_COUNT * DMR_MAX_PDU_LENGTH + 2U];
|
|
::memset(m_pduUserData, 0x00U, DMR_MAX_PDU_COUNT * DMR_MAX_PDU_LENGTH + 2U);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Finalizes a instance of the DataPacket class.
|
|
/// </summary>
|
|
DataPacket::~DataPacket()
|
|
{
|
|
delete[] m_pduUserData;
|
|
}
|