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.
285 lines
7.8 KiB
285 lines
7.8 KiB
/**
|
|
* Digital Voice Modem - Common Library
|
|
* GPLv2 Open Source. Use is subject to license terms.
|
|
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
|
|
*
|
|
* @package DVM / Common Library
|
|
*
|
|
*/
|
|
/*
|
|
* 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/TDULC.h"
|
|
#include "p25/P25Utils.h"
|
|
#include "edac/CRC.h"
|
|
#include "edac/Golay24128.h"
|
|
#include "Log.h"
|
|
#include "Utils.h"
|
|
|
|
using namespace p25::lc;
|
|
using namespace p25;
|
|
|
|
#include <cstdio>
|
|
#include <cmath>
|
|
#include <cassert>
|
|
#include <cstring>
|
|
|
|
// ---------------------------------------------------------------------------
|
|
// Static Class Members
|
|
// ---------------------------------------------------------------------------
|
|
|
|
bool TDULC::m_verbose = false;
|
|
|
|
SiteData TDULC::m_siteData = SiteData();
|
|
|
|
// ---------------------------------------------------------------------------
|
|
// Public Class Members
|
|
// ---------------------------------------------------------------------------
|
|
|
|
/// <summary>
|
|
/// Initializes a copy instance of the TDULC class.
|
|
/// </summary>
|
|
/// <param name="data"></param>
|
|
TDULC::TDULC(const TDULC& data) : TDULC()
|
|
{
|
|
copy(data);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Initializes a new instance of the TDULC class.
|
|
/// </summary>
|
|
/// <param name="lc"></param>
|
|
TDULC::TDULC(LC* lc) : TDULC()
|
|
{
|
|
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_grpVchNo = lc->m_grpVchNo;
|
|
|
|
m_emergency = lc->m_emergency;
|
|
m_encrypted = lc->m_encrypted;
|
|
m_priority = lc->m_priority;
|
|
|
|
m_group = lc->m_group;
|
|
|
|
m_callTimer = lc->m_callTimer;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Initializes a new instance of the TDULC class.
|
|
/// </summary>
|
|
TDULC::TDULC() :
|
|
m_protect(false),
|
|
m_lco(LC_GROUP),
|
|
m_mfId(P25_MFG_STANDARD),
|
|
m_srcId(0U),
|
|
m_dstId(0U),
|
|
m_grpVchNo(0U),
|
|
m_emergency(false),
|
|
m_encrypted(false),
|
|
m_priority(4U),
|
|
m_group(true),
|
|
m_siteIdenEntry(lookups::IdenTable()),
|
|
m_rs(),
|
|
m_implicit(false),
|
|
m_callTimer(0U)
|
|
{
|
|
m_grpVchNo = m_siteData.channelNo();
|
|
}
|
|
|
|
/// <summary>
|
|
/// Finalizes a instance of TDULC class.
|
|
/// </summary>
|
|
TDULC::~TDULC()
|
|
{
|
|
/* stub */
|
|
}
|
|
|
|
// ---------------------------------------------------------------------------
|
|
// Private Class Members
|
|
// ---------------------------------------------------------------------------
|
|
|
|
/// <summary>
|
|
/// Internal helper to convert payload bytes to a 64-bit long value.
|
|
/// </summary>
|
|
/// <param name="tsbk"></param>
|
|
/// <returns></returns>
|
|
ulong64_t TDULC::toValue(const uint8_t* payload)
|
|
{
|
|
assert(payload != nullptr);
|
|
|
|
ulong64_t value = 0U;
|
|
|
|
// combine bytes into ulong64_t (8 byte) value
|
|
value = payload[0U];
|
|
value = (value << 8) + payload[1U];
|
|
value = (value << 8) + payload[2U];
|
|
value = (value << 8) + payload[3U];
|
|
value = (value << 8) + payload[4U];
|
|
value = (value << 8) + payload[5U];
|
|
value = (value << 8) + payload[6U];
|
|
value = (value << 8) + payload[7U];
|
|
|
|
return value;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Internal helper to convert a 64-bit long value to payload bytes.
|
|
/// </summary>
|
|
/// <param name="rsValue"></param>
|
|
/// <returns></returns>
|
|
UInt8Array TDULC::fromValue(const ulong64_t value)
|
|
{
|
|
UInt8Array payload = std::unique_ptr<uint8_t[]>(new uint8_t[P25_TDULC_PAYLOAD_LENGTH_BYTES]);
|
|
::memset(payload.get(), 0x00U, P25_TDULC_PAYLOAD_LENGTH_BYTES);
|
|
|
|
// split ulong64_t (8 byte) value into bytes
|
|
payload[0U] = (uint8_t)((value >> 56) & 0xFFU);
|
|
payload[1U] = (uint8_t)((value >> 48) & 0xFFU);
|
|
payload[2U] = (uint8_t)((value >> 40) & 0xFFU);
|
|
payload[3U] = (uint8_t)((value >> 32) & 0xFFU);
|
|
payload[4U] = (uint8_t)((value >> 24) & 0xFFU);
|
|
payload[5U] = (uint8_t)((value >> 16) & 0xFFU);
|
|
payload[6U] = (uint8_t)((value >> 8) & 0xFFU);
|
|
payload[7U] = (uint8_t)((value >> 0) & 0xFFU);
|
|
|
|
return payload;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Internal helper to decode a terminator data unit w/ link control.
|
|
/// </summary>
|
|
/// <param name="data"></param>
|
|
/// <param name="payload"></param>
|
|
/// <returns>True, if TDULC was decoded, otherwise false.</returns>
|
|
bool TDULC::decode(const uint8_t* data, uint8_t* payload)
|
|
{
|
|
assert(data != nullptr);
|
|
assert(payload != nullptr);
|
|
|
|
uint8_t rs[P25_TDULC_LENGTH_BYTES];
|
|
::memset(rs, 0x00U, P25_TDULC_LENGTH_BYTES);
|
|
|
|
// deinterleave
|
|
uint8_t raw[P25_TDULC_FEC_LENGTH_BYTES + 1U];
|
|
P25Utils::decode(data, raw, 114U, 410U);
|
|
|
|
// decode Golay (24,12,8) FEC
|
|
edac::Golay24128::decode24128(rs, raw, P25_TDULC_LENGTH_BYTES);
|
|
|
|
#if DEBUG_P25_TDULC
|
|
Utils::dump(2U, "TDULC::decode(), TDULC RS", rs, P25_TDULC_LENGTH_BYTES);
|
|
#endif
|
|
|
|
// decode RS (24,12,13) FEC
|
|
try {
|
|
bool ret = m_rs.decode241213(rs);
|
|
if (!ret) {
|
|
LogError(LOG_P25, "TDULC::decode(), failed to decode RS (24,12,13) FEC");
|
|
return false;
|
|
}
|
|
}
|
|
catch (...) {
|
|
Utils::dump(2U, "P25, RS excepted with input data", rs, P25_TDULC_LENGTH_BYTES);
|
|
return false;
|
|
}
|
|
|
|
if (m_verbose) {
|
|
Utils::dump(2U, "TDULC::decode(), TDULC Value", rs, P25_TDULC_LENGTH_BYTES);
|
|
}
|
|
|
|
::memcpy(payload, rs + 1U, P25_TDULC_PAYLOAD_LENGTH_BYTES);
|
|
return true;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Internal helper to encode a terminator data unit w/ link control.
|
|
/// </summary>
|
|
/// <param name="data"></param>
|
|
/// <param name="payload"></param>
|
|
void TDULC::encode(uint8_t* data, const uint8_t* payload)
|
|
{
|
|
assert(data != nullptr);
|
|
assert(payload != nullptr);
|
|
|
|
uint8_t rs[P25_TDULC_LENGTH_BYTES];
|
|
::memset(rs, 0x00U, P25_TDULC_LENGTH_BYTES);
|
|
::memcpy(rs + 1U, payload, P25_TDULC_PAYLOAD_LENGTH_BYTES);
|
|
|
|
rs[0U] = m_lco; // LCO
|
|
if (m_implicit)
|
|
rs[0U] |= 0x40U; // Implicit Operation
|
|
|
|
if (m_verbose) {
|
|
Utils::dump(2U, "TDULC::encode(), TDULC Value", rs, P25_TDULC_LENGTH_BYTES);
|
|
}
|
|
|
|
// encode RS (24,12,13) FEC
|
|
m_rs.encode241213(rs);
|
|
|
|
#if DEBUG_P25_TDULC
|
|
Utils::dump(2U, "TDULC::encode(), TDULC RS", rs, P25_TDULC_LENGTH_BYTES);
|
|
#endif
|
|
|
|
uint8_t raw[P25_TDULC_FEC_LENGTH_BYTES + 1U];
|
|
::memset(raw, 0x00U, P25_TDULC_FEC_LENGTH_BYTES + 1U);
|
|
|
|
// encode Golay (24,12,8) FEC
|
|
edac::Golay24128::encode24128(raw, rs, P25_TDULC_LENGTH_BYTES);
|
|
|
|
// interleave
|
|
P25Utils::encode(raw, data, 114U, 410U);
|
|
|
|
#if DEBUG_P25_TDULC
|
|
Utils::dump(2U, "TDULC::encode(), TDULC Interleave", data, P25_TDULC_FRAME_LENGTH_BYTES + P25_PREAMBLE_LENGTH_BYTES);
|
|
#endif
|
|
}
|
|
|
|
/// <summary>
|
|
/// Internal helper to copy the the class.
|
|
/// </summary>
|
|
/// <param name="data"></param>
|
|
void TDULC::copy(const TDULC& data)
|
|
{
|
|
m_verbose = data.m_verbose;
|
|
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_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_callTimer = data.m_callTimer;
|
|
|
|
m_siteData = data.m_siteData;
|
|
m_siteIdenEntry = data.m_siteIdenEntry;
|
|
}
|