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.
356 lines
10 KiB
356 lines
10 KiB
/**
|
|
* 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
|
|
*
|
|
*/
|
|
/*
|
|
* Copyright (C) 2017-2022 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 "p25/P25Defines.h"
|
|
#include "p25/lc/TSBK.h"
|
|
#include "p25/P25Utils.h"
|
|
#include "edac/CRC.h"
|
|
#include "Log.h"
|
|
#include "Utils.h"
|
|
|
|
using namespace p25::lc;
|
|
using namespace p25;
|
|
|
|
#include <cassert>
|
|
|
|
// ---------------------------------------------------------------------------
|
|
// Static Class Members
|
|
// ---------------------------------------------------------------------------
|
|
|
|
bool TSBK::m_verbose = false;
|
|
#if FORCE_TSBK_CRC_WARN
|
|
bool TSBK::m_warnCRC = true;
|
|
#else
|
|
bool TSBK::m_warnCRC = false;
|
|
#endif
|
|
|
|
uint8_t *TSBK::m_siteCallsign = nullptr;
|
|
SiteData TSBK::m_siteData = SiteData();
|
|
|
|
// ---------------------------------------------------------------------------
|
|
// Public Class Members
|
|
// ---------------------------------------------------------------------------
|
|
|
|
/// <summary>
|
|
/// Initializes a copy instance of the TSBK class.
|
|
/// </summary>
|
|
/// <param name="data"></param>
|
|
TSBK::TSBK(const TSBK& data) : TSBK()
|
|
{
|
|
copy(data);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Initializes a new instance of the TSBK class.
|
|
/// </summary>
|
|
/// <param name="lc"></param>
|
|
TSBK::TSBK(LC* lc) : TSBK()
|
|
{
|
|
m_protect = lc->m_protect;
|
|
m_lco = lc->m_lco;
|
|
m_mfId = lc->m_mfId;
|
|
|
|
m_srcId = lc->m_srcId;
|
|
m_dstId = lc->m_dstId;
|
|
|
|
m_emergency = lc->m_emergency;
|
|
m_encrypted = lc->m_encrypted;
|
|
m_priority = lc->m_priority;
|
|
|
|
m_group = lc->m_group;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Initializes a new instance of the TSBK class.
|
|
/// </summary>
|
|
/// <remarks>This should never be used.</remarks>
|
|
TSBK::TSBK() :
|
|
m_protect(false),
|
|
m_lco(LC_GROUP),
|
|
m_mfId(P25_MFG_STANDARD),
|
|
m_srcId(0U),
|
|
m_dstId(0U),
|
|
m_lastBlock(false),
|
|
m_aivFlag(true),
|
|
m_extendedAddrFlag(false),
|
|
m_service(0U),
|
|
m_response(P25_RSP_ACCEPT),
|
|
m_netId(P25_WACN_STD_DEFAULT),
|
|
m_sysId(P25_SID_STD_DEFAULT),
|
|
m_emergency(false),
|
|
m_encrypted(false),
|
|
m_priority(4U),
|
|
m_group(true),
|
|
m_siteIdenEntry(lookups::IdenTable()),
|
|
m_rs(),
|
|
m_trellis()
|
|
{
|
|
if (m_siteCallsign == nullptr) {
|
|
m_siteCallsign = new uint8_t[P25_MOT_CALLSIGN_LENGTH_BYTES];
|
|
::memset(m_siteCallsign, 0x00U, P25_MOT_CALLSIGN_LENGTH_BYTES);
|
|
}
|
|
|
|
#if FORCE_TSBK_CRC_WARN
|
|
m_warnCRC = true;
|
|
#endif
|
|
}
|
|
|
|
/// <summary>
|
|
/// Finalizes a instance of TSBK class.
|
|
/// </summary>
|
|
TSBK::~TSBK()
|
|
{
|
|
/* stub */
|
|
}
|
|
|
|
/// <summary>
|
|
/// Sets the callsign.
|
|
/// </summary>
|
|
/// <param name="callsign">Callsign.</param>
|
|
void TSBK::setCallsign(std::string callsign)
|
|
{
|
|
if (m_siteCallsign == nullptr) {
|
|
m_siteCallsign = new uint8_t[P25_MOT_CALLSIGN_LENGTH_BYTES];
|
|
::memset(m_siteCallsign, 0x00U, P25_MOT_CALLSIGN_LENGTH_BYTES);
|
|
}
|
|
|
|
uint32_t idLength = callsign.length();
|
|
if (idLength > 0) {
|
|
::memset(m_siteCallsign, 0x20U, P25_MOT_CALLSIGN_LENGTH_BYTES);
|
|
|
|
if (idLength > P25_MOT_CALLSIGN_LENGTH_BYTES)
|
|
idLength = P25_MOT_CALLSIGN_LENGTH_BYTES;
|
|
for (uint32_t i = 0; i < idLength; i++)
|
|
m_siteCallsign[i] = callsign[i];
|
|
}
|
|
}
|
|
|
|
// ---------------------------------------------------------------------------
|
|
// Protected Class Members
|
|
// ---------------------------------------------------------------------------
|
|
|
|
/// <summary>
|
|
/// Internal helper to convert TSBK bytes to a 64-bit long value.
|
|
/// </summary>
|
|
/// <param name="tsbk"></param>
|
|
/// <returns></returns>
|
|
ulong64_t TSBK::toValue(const uint8_t* tsbk)
|
|
{
|
|
ulong64_t tsbkValue = 0U;
|
|
|
|
// combine bytes into ulong64_t (8 byte) value
|
|
tsbkValue = tsbk[2U];
|
|
tsbkValue = (tsbkValue << 8) + tsbk[3U];
|
|
tsbkValue = (tsbkValue << 8) + tsbk[4U];
|
|
tsbkValue = (tsbkValue << 8) + tsbk[5U];
|
|
tsbkValue = (tsbkValue << 8) + tsbk[6U];
|
|
tsbkValue = (tsbkValue << 8) + tsbk[7U];
|
|
tsbkValue = (tsbkValue << 8) + tsbk[8U];
|
|
tsbkValue = (tsbkValue << 8) + tsbk[9U];
|
|
|
|
return tsbkValue;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Internal helper to convert a 64-bit long value to TSBK bytes.
|
|
/// </summary>
|
|
/// <param name="tsbkValue"></param>
|
|
/// <returns></returns>
|
|
std::unique_ptr<uint8_t[]> TSBK::fromValue(const ulong64_t tsbkValue)
|
|
{
|
|
__UNIQUE_BUFFER(tsbk, uint8_t, P25_TSBK_LENGTH_BYTES);
|
|
|
|
// split ulong64_t (8 byte) value into bytes
|
|
tsbk[2U] = (uint8_t)((tsbkValue >> 56) & 0xFFU);
|
|
tsbk[3U] = (uint8_t)((tsbkValue >> 48) & 0xFFU);
|
|
tsbk[4U] = (uint8_t)((tsbkValue >> 40) & 0xFFU);
|
|
tsbk[5U] = (uint8_t)((tsbkValue >> 32) & 0xFFU);
|
|
tsbk[6U] = (uint8_t)((tsbkValue >> 24) & 0xFFU);
|
|
tsbk[7U] = (uint8_t)((tsbkValue >> 16) & 0xFFU);
|
|
tsbk[8U] = (uint8_t)((tsbkValue >> 8) & 0xFFU);
|
|
tsbk[9U] = (uint8_t)((tsbkValue >> 0) & 0xFFU);
|
|
|
|
return tsbk;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Internal helper to decode a trunking signalling block.
|
|
/// </summary>
|
|
/// <param name="data"></param>
|
|
/// <param name="tsbk"></param>
|
|
/// <param name="rawTSBK"></param>
|
|
/// <returns>True, if TSBK was decoded, otherwise false.</returns>
|
|
bool TSBK::decode(const uint8_t* data, uint8_t* tsbk, bool rawTSBK)
|
|
{
|
|
assert(data != nullptr);
|
|
assert(tsbk != nullptr);
|
|
|
|
if (rawTSBK) {
|
|
::memcpy(tsbk, data, P25_TSBK_LENGTH_BYTES);
|
|
|
|
bool ret = edac::CRC::checkCCITT162(tsbk, P25_TSBK_LENGTH_BYTES);
|
|
if (!ret) {
|
|
if (m_warnCRC) {
|
|
LogWarning(LOG_P25, "TSBK::decode(), failed CRC CCITT-162 check");
|
|
ret = true; // ignore CRC error
|
|
}
|
|
else {
|
|
LogError(LOG_P25, "TSBK::decode(), failed CRC CCITT-162 check");
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
// deinterleave
|
|
uint8_t raw[P25_TSBK_FEC_LENGTH_BYTES];
|
|
P25Utils::decode(data, raw, 114U, 318U);
|
|
|
|
// decode 1/2 rate Trellis & check CRC-CCITT 16
|
|
try {
|
|
bool ret = m_trellis.decode12(raw, tsbk);
|
|
if (!ret) {
|
|
LogError(LOG_P25, "TSBK::decode(), failed to decode Trellis 1/2 rate coding");
|
|
}
|
|
|
|
if (ret) {
|
|
ret = edac::CRC::checkCCITT162(tsbk, P25_TSBK_LENGTH_BYTES);
|
|
if (!ret) {
|
|
if (m_warnCRC) {
|
|
LogWarning(LOG_P25, "TSBK::decode(), failed CRC CCITT-162 check");
|
|
ret = true; // ignore CRC error
|
|
}
|
|
else {
|
|
LogError(LOG_P25, "TSBK::decode(), failed CRC CCITT-162 check");
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!ret)
|
|
return false;
|
|
}
|
|
catch (...) {
|
|
Utils::dump(2U, "P25, decoding excepted with input data", tsbk, P25_TSBK_LENGTH_BYTES);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if (m_verbose) {
|
|
Utils::dump(2U, "Decoded TSBK", tsbk, P25_TSBK_LENGTH_BYTES);
|
|
}
|
|
|
|
m_lco = tsbk[0U] & 0x3F; // LCO
|
|
m_lastBlock = (tsbk[0U] & 0x80U) == 0x80U; // Last Block Marker
|
|
m_mfId = tsbk[1U]; // Mfg Id.
|
|
|
|
return true;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Internal helper to eecode a trunking signalling block.
|
|
/// </summary>
|
|
/// <param name="data"></param>
|
|
/// <param name="tsbk"></param>
|
|
/// <param name="rawTSBK"></param>
|
|
/// <param name="noTrellis"></param>
|
|
void TSBK::encode(uint8_t* data, const uint8_t* tsbk, bool rawTSBK, bool noTrellis)
|
|
{
|
|
assert(data != nullptr);
|
|
assert(tsbk != nullptr);
|
|
|
|
uint8_t outTsbk[P25_TSBK_LENGTH_BYTES];
|
|
::memset(outTsbk, 0x00U, P25_TSBK_LENGTH_BYTES);
|
|
::memcpy(outTsbk, tsbk, P25_TSBK_LENGTH_BYTES);
|
|
|
|
outTsbk[0U] = m_lco; // LCO
|
|
outTsbk[0U] |= (m_lastBlock) ? 0x80U : 0x00U; // Last Block Marker
|
|
|
|
outTsbk[1U] = m_mfId;
|
|
|
|
// compute CRC-CCITT 16
|
|
edac::CRC::addCCITT162(outTsbk, P25_TSBK_LENGTH_BYTES);
|
|
|
|
if (m_verbose) {
|
|
Utils::dump(2U, "TSBK::encode(), TSBK Value", outTsbk, P25_TSBK_LENGTH_BYTES);
|
|
}
|
|
|
|
uint8_t raw[P25_TSBK_FEC_LENGTH_BYTES];
|
|
::memset(raw, 0x00U, P25_TSBK_FEC_LENGTH_BYTES);
|
|
|
|
// encode 1/2 rate Trellis
|
|
m_trellis.encode12(outTsbk, raw);
|
|
|
|
// are we encoding a raw TSBK?
|
|
if (rawTSBK) {
|
|
if (noTrellis) {
|
|
::memcpy(data, outTsbk, P25_TSBK_LENGTH_BYTES);
|
|
}
|
|
else {
|
|
::memcpy(data, raw, P25_TSBK_FEC_LENGTH_BYTES);
|
|
}
|
|
}
|
|
else {
|
|
// interleave
|
|
P25Utils::encode(raw, data, 114U, 318U);
|
|
|
|
#if DEBUG_P25_TSBK
|
|
Utils::dump(2U, "TSBK::encode(), TSBK Interleave", data, P25_TSBK_FEC_LENGTH_BYTES + P25_PREAMBLE_LENGTH_BYTES);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Internal helper to copy the the class.
|
|
/// </summary>
|
|
/// <param name="data"></param>
|
|
void TSBK::copy(const TSBK& data)
|
|
{
|
|
m_protect = data.m_protect;
|
|
m_lco = data.m_lco;
|
|
m_mfId = data.m_mfId;
|
|
|
|
m_srcId = data.m_srcId;
|
|
m_dstId = data.m_dstId;
|
|
|
|
m_lastBlock = data.m_lastBlock;
|
|
m_aivFlag = data.m_aivFlag;
|
|
m_extendedAddrFlag = data.m_extendedAddrFlag;
|
|
|
|
m_response = data.m_response;
|
|
m_service = data.m_service;
|
|
|
|
m_netId = data.m_netId;
|
|
m_sysId = data.m_sysId;
|
|
|
|
m_grpVchNo = data.m_grpVchNo;
|
|
|
|
m_emergency = data.m_emergency;
|
|
m_encrypted = data.m_encrypted;
|
|
m_priority = data.m_priority;
|
|
|
|
m_group = data.m_group;
|
|
|
|
m_siteIdenEntry = data.m_siteIdenEntry;
|
|
}
|