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NXDNKenwoodNetwork.cpp
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/*
* Copyright (C) 2009-2014,2016,2018,2020 by Jonathan Naylor G4KLX
*
* 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 "NXDNKenwoodNetwork.h"
#include "NXDNCRC.h"
#include "Utils.h"
#include "Log.h"
#include <cstdio>
#include <cassert>
#include <cstring>
#include <ctime>
const unsigned char BIT_MASK_TABLE[] = { 0x80U, 0x40U, 0x20U, 0x10U, 0x08U, 0x04U, 0x02U, 0x01U };
#define WRITE_BIT(p,i,b) p[(i)>>3] = (b) ? (p[(i)>>3] | BIT_MASK_TABLE[(i)&7]) : (p[(i)>>3] & ~BIT_MASK_TABLE[(i)&7])
#define READ_BIT(p,i) (p[(i)>>3] & BIT_MASK_TABLE[(i)&7])
const unsigned int BUFFER_LENGTH = 200U;
CNXDNKenwoodNetwork::CNXDNKenwoodNetwork(const std::string& localAddress, unsigned short localPort, const std::string& gwyAddress, unsigned short gwyPort, bool debug) :
m_rtpSocket(localAddress, localPort + 0U),
m_rtcpSocket(localAddress, localPort + 1U),
m_rtcpAddr(),
m_rtpAddr(),
m_rtcpAddrLen(0U),
m_rtpAddrLen(0U),
m_enabled(false),
m_headerSeen(false),
m_seen1(false),
m_seen2(false),
m_seen3(false),
m_seen4(false),
m_sacch(NULL),
m_sessionId(1U),
m_seqNo(0U),
m_ssrc(0U),
m_debug(debug),
m_startSecs(0U),
m_startUSecs(0U),
m_rtcpTimer(1000U, 0U, 200U),
m_hangTimer(1000U, 5U),
m_hangType(0U),
m_hangSrc(0U),
m_hangDst(0U),
m_random()
{
assert(localPort > 0U);
assert(!gwyAddress.empty());
assert(gwyPort > 0U);
m_sacch = new unsigned char[10U];
if (CUDPSocket::lookup(gwyAddress, gwyPort + 1U, m_rtcpAddr, m_rtcpAddrLen) != 0)
m_rtcpAddrLen = 0U;
if (CUDPSocket::lookup(gwyAddress, gwyPort + 0U, m_rtpAddr, m_rtpAddrLen) != 0)
m_rtpAddrLen = 0U;
std::random_device rd;
std::mt19937 mt(rd());
m_random = mt;
}
CNXDNKenwoodNetwork::~CNXDNKenwoodNetwork()
{
delete[] m_sacch;
}
bool CNXDNKenwoodNetwork::open()
{
if (m_rtcpAddrLen == 0U || m_rtpAddrLen == 0U) {
LogError("Unable to resolve the address of the NXDN Gateway");
return false;
}
LogMessage("Opening Kenwood connection");
if (!m_rtcpSocket.open(m_rtcpAddr))
return false;
if (!m_rtpSocket.open(m_rtpAddr)) {
m_rtcpSocket.close();
return false;
}
std::uniform_int_distribution<unsigned int> dist(0x00000001, 0xfffffffe);
m_ssrc = dist(m_random);
return true;
}
bool CNXDNKenwoodNetwork::write(const unsigned char* data, NXDN_NETWORK_MESSAGE_TYPE type)
{
assert(data != NULL);
switch (type) {
case NNMT_VOICE_HEADER: // Voice header or trailer
case NNMT_VOICE_TRAILER:
return processIcomVoiceHeader(data);
case NNMT_VOICE_BODY: // Voice data
return processIcomVoiceData(data);
case NNMT_DATA_HEADER: // Data header or trailer
case NNMT_DATA_TRAILER:
return processIcomDataHeader(data);
case NNMT_DATA_BODY: // Data data
return processIcomDataData(data);
default:
return false;
}
}
bool CNXDNKenwoodNetwork::processIcomVoiceHeader(const unsigned char* inData)
{
assert(inData != NULL);
unsigned char outData[30U];
::memset(outData, 0x00U, 30U);
// SACCH
outData[0U] = inData[2U];
outData[1U] = inData[1U];
outData[2U] = inData[4U] & 0xC0U;
outData[3U] = inData[3U];
// FACCH 1+2
outData[4U] = outData[14U] = inData[6U];
outData[5U] = outData[15U] = inData[5U];
outData[6U] = outData[16U] = inData[8U];
outData[7U] = outData[17U] = inData[7U];
outData[8U] = outData[18U] = inData[10U];
outData[9U] = outData[19U] = inData[9U];
outData[10U] = outData[20U] = inData[12U];
outData[11U] = outData[21U] = inData[11U];
unsigned short src = (inData[8U] << 8) + (inData[9U] << 0);
unsigned short dst = (inData[10U] << 8) + (inData[11U] << 0);
unsigned char type = (inData[7U] >> 5) & 0x07U;
switch (inData[5U] & 0x3FU) {
case 0x01U:
m_hangTimer.stop();
m_rtcpTimer.start();
writeRTCPStart();
return writeRTPVoiceHeader(outData);
case 0x08U: {
m_hangTimer.start();
bool ret = writeRTPVoiceTrailer(outData);
writeRTCPHang(type, src, dst);
return ret;
}
default:
return false;
}
}
bool CNXDNKenwoodNetwork::processIcomVoiceData(const unsigned char* inData)
{
assert(inData != NULL);
unsigned char outData[40U], temp[10U];
::memset(outData, 0x00U, 40U);
// SACCH
outData[0U] = inData[2U];
outData[1U] = inData[1U];
outData[2U] = inData[4U] & 0xC0U;
outData[3U] = inData[3U];
// Audio 1
::memset(temp, 0x00U, 10U);
for (unsigned int i = 0U; i < 49U; i++) {
unsigned int offset = (5U * 8U) + i;
bool b = READ_BIT(inData, offset);
WRITE_BIT(temp, i, b);
}
outData[4U] = temp[1U];
outData[5U] = temp[0U];
outData[6U] = temp[3U];
outData[7U] = temp[2U];
outData[8U] = temp[5U];
outData[9U] = temp[4U];
outData[10U] = temp[7U];
outData[11U] = temp[6U];
// Audio 2
::memset(temp, 0x00U, 10U);
for (unsigned int i = 0U; i < 49U; i++) {
unsigned int offset = (5U * 8U) + 49U + i;
bool b = READ_BIT(inData, offset);
WRITE_BIT(temp, i, b);
}
outData[12U] = temp[1U];
outData[13U] = temp[0U];
outData[14U] = temp[3U];
outData[15U] = temp[2U];
outData[16U] = temp[5U];
outData[17U] = temp[4U];
outData[18U] = temp[7U];
outData[19U] = temp[6U];
// Audio 3
::memset(temp, 0x00U, 10U);
for (unsigned int i = 0U; i < 49U; i++) {
unsigned int offset = (19U * 8U) + i;
bool b = READ_BIT(inData, offset);
WRITE_BIT(temp, i, b);
}
outData[20U] = temp[1U];
outData[21U] = temp[0U];
outData[22U] = temp[3U];
outData[23U] = temp[2U];
outData[24U] = temp[5U];
outData[25U] = temp[4U];
outData[26U] = temp[7U];
outData[27U] = temp[6U];
// Audio 4
::memset(temp, 0x00U, 10U);
for (unsigned int i = 0U; i < 49U; i++) {
unsigned int offset = (19U * 8U) + 49U + i;
bool b = READ_BIT(inData, offset);
WRITE_BIT(temp, i, b);
}
outData[28U] = temp[1U];
outData[29U] = temp[0U];
outData[30U] = temp[3U];
outData[31U] = temp[2U];
outData[32U] = temp[5U];
outData[33U] = temp[4U];
outData[34U] = temp[7U];
outData[35U] = temp[6U];
return writeRTPVoiceData(outData);
}
bool CNXDNKenwoodNetwork::processIcomDataHeader(const unsigned char* inData)
{
assert(inData != NULL);
unsigned char outData[30U];
::memset(outData, 0x00U, 30U);
// SACCH
outData[0U] = inData[2U];
outData[1U] = inData[1U];
outData[2U] = inData[4U] & 0xC0U;
outData[3U] = inData[3U];
// FACCH 1+2
outData[4U] = outData[14U] = inData[6U];
outData[5U] = outData[15U] = inData[5U];
outData[6U] = outData[16U] = inData[8U];
outData[7U] = outData[17U] = inData[7U];
outData[8U] = outData[18U] = inData[10U];
outData[9U] = outData[19U] = inData[9U];
outData[10U] = outData[20U] = inData[12U];
outData[11U] = outData[21U] = inData[11U];
unsigned short src = (inData[8U] << 8) + (inData[9U] << 0);
unsigned short dst = (inData[10U] << 8) + (inData[11U] << 0);
unsigned char type = (inData[7U] >> 5) & 0x07U;
switch (inData[5U] & 0x3FU) {
case 0x09U:
m_hangTimer.stop();
m_rtcpTimer.start();
writeRTCPStart();
return writeRTPDataHeader(outData);
case 0x08U: {
m_hangTimer.start();
bool ret = writeRTPDataTrailer(outData);
writeRTCPHang(type, src, dst);
return ret;
}
default:
return false;
}
}
bool CNXDNKenwoodNetwork::processIcomDataData(const unsigned char* inData)
{
assert(inData != NULL);
unsigned char outData[40U];
::memset(outData, 0x00U, 40U);
outData[0U] = inData[2U];
outData[1U] = inData[1U];
outData[2U] = inData[4U];
outData[3U] = inData[3U];
outData[4U] = inData[6U];
outData[5U] = inData[5U];
outData[6U] = inData[8U];
outData[7U] = inData[7U];
outData[8U] = inData[10U];
outData[9U] = inData[9U];
outData[10U] = inData[12U];
outData[11U] = inData[11U];
outData[12U] = inData[14U];
outData[13U] = inData[13U];
outData[14U] = inData[16U];
outData[15U] = inData[15U];
outData[16U] = inData[18U];
outData[17U] = inData[17U];
outData[18U] = inData[20U];
outData[19U] = inData[19U];
outData[20U] = inData[22U];
outData[21U] = inData[21U];
return writeRTPDataData(outData);
}
bool CNXDNKenwoodNetwork::writeRTPVoiceHeader(const unsigned char* data)
{
assert(data != NULL);
unsigned char buffer[50U];
::memset(buffer, 0x00U, 50U);
buffer[0U] = 0x80U;
buffer[1U] = 0x66U;
m_seqNo++;
buffer[2U] = (m_seqNo >> 8) & 0xFFU;
buffer[3U] = (m_seqNo >> 0) & 0xFFU;
unsigned long timeStamp = getTimeStamp();
buffer[4U] = (timeStamp >> 24) & 0xFFU;
buffer[5U] = (timeStamp >> 16) & 0xFFU;
buffer[6U] = (timeStamp >> 8) & 0xFFU;
buffer[7U] = (timeStamp >> 0) & 0xFFU;
buffer[8U] = (m_ssrc >> 24) & 0xFFU;
buffer[9U] = (m_ssrc >> 16) & 0xFFU;
buffer[10U] = (m_ssrc >> 8) & 0xFFU;
buffer[11U] = (m_ssrc >> 0) & 0xFFU;
m_sessionId++;
buffer[12U] = m_sessionId;
buffer[13U] = 0x00U;
buffer[14U] = 0x00U;
buffer[15U] = 0x00U;
buffer[16U] = 0x03U;
buffer[17U] = 0x03U;
buffer[18U] = 0x04U;
buffer[19U] = 0x04U;
buffer[20U] = 0x0AU;
buffer[21U] = 0x05U;
buffer[22U] = 0x0AU;
::memcpy(buffer + 23U, data, 24U);
if (m_debug)
CUtils::dump(1U, "Kenwood Network RTP Data Sent", buffer, 47U);
return m_rtpSocket.write(buffer, 47U, m_rtpAddr, m_rtpAddrLen);
}
bool CNXDNKenwoodNetwork::writeRTPVoiceTrailer(const unsigned char* data)
{
assert(data != NULL);
unsigned char buffer[50U];
::memset(buffer, 0x00U, 50U);
buffer[0U] = 0x80U;
buffer[1U] = 0x66U;
m_seqNo++;
buffer[2U] = (m_seqNo >> 8) & 0xFFU;
buffer[3U] = (m_seqNo >> 0) & 0xFFU;
unsigned long timeStamp = getTimeStamp();
buffer[4U] = (timeStamp >> 24) & 0xFFU;
buffer[5U] = (timeStamp >> 16) & 0xFFU;
buffer[6U] = (timeStamp >> 8) & 0xFFU;
buffer[7U] = (timeStamp >> 0) & 0xFFU;
buffer[8U] = (m_ssrc >> 24) & 0xFFU;
buffer[9U] = (m_ssrc >> 16) & 0xFFU;
buffer[10U] = (m_ssrc >> 8) & 0xFFU;
buffer[11U] = (m_ssrc >> 0) & 0xFFU;
buffer[12U] = m_sessionId;
buffer[13U] = 0x00U;
buffer[14U] = 0x00U;
buffer[15U] = 0x00U;
buffer[16U] = 0x03U;
buffer[17U] = 0x03U;
buffer[18U] = 0x04U;
buffer[19U] = 0x04U;
buffer[20U] = 0x0AU;
buffer[21U] = 0x05U;
buffer[22U] = 0x0AU;
::memcpy(buffer + 23U, data, 24U);
if (m_debug)
CUtils::dump(1U, "Kenwood Network RTP Data Sent", buffer, 47U);
return m_rtpSocket.write(buffer, 47U, m_rtpAddr, m_rtpAddrLen);
}
bool CNXDNKenwoodNetwork::writeRTPVoiceData(const unsigned char* data)
{
assert(data != NULL);
unsigned char buffer[60U];
::memset(buffer, 0x00U, 60U);
buffer[0U] = 0x80U;
buffer[1U] = 0x66U;
m_seqNo++;
buffer[2U] = (m_seqNo >> 8) & 0xFFU;
buffer[3U] = (m_seqNo >> 0) & 0xFFU;
unsigned long timeStamp = getTimeStamp();
buffer[4U] = (timeStamp >> 24) & 0xFFU;
buffer[5U] = (timeStamp >> 16) & 0xFFU;
buffer[6U] = (timeStamp >> 8) & 0xFFU;
buffer[7U] = (timeStamp >> 0) & 0xFFU;
buffer[8U] = (m_ssrc >> 24) & 0xFFU;
buffer[9U] = (m_ssrc >> 16) & 0xFFU;
buffer[10U] = (m_ssrc >> 8) & 0xFFU;
buffer[11U] = (m_ssrc >> 0) & 0xFFU;
buffer[12U] = m_sessionId;
buffer[13U] = 0x00U;
buffer[14U] = 0x00U;
buffer[15U] = 0x00U;
buffer[16U] = 0x03U;
buffer[17U] = 0x02U;
buffer[18U] = 0x04U;
buffer[19U] = 0x07U;
buffer[20U] = 0x10U;
buffer[21U] = 0x08U;
buffer[22U] = 0x10U;
::memcpy(buffer + 23U, data, 36U);
if (m_debug)
CUtils::dump(1U, "Kenwood Network RTP Data Sent", buffer, 59U);
return m_rtpSocket.write(buffer, 59U, m_rtpAddr, m_rtpAddrLen);
}
bool CNXDNKenwoodNetwork::writeRTPDataHeader(const unsigned char* data)
{
assert(data != NULL);
unsigned char buffer[50U];
::memset(buffer, 0x00U, 50U);
buffer[0U] = 0x80U;
buffer[1U] = 0x66U;
m_seqNo++;
buffer[2U] = (m_seqNo >> 8) & 0xFFU;
buffer[3U] = (m_seqNo >> 0) & 0xFFU;
unsigned long timeStamp = getTimeStamp();
buffer[4U] = (timeStamp >> 24) & 0xFFU;
buffer[5U] = (timeStamp >> 16) & 0xFFU;
buffer[6U] = (timeStamp >> 8) & 0xFFU;
buffer[7U] = (timeStamp >> 0) & 0xFFU;
buffer[8U] = (m_ssrc >> 24) & 0xFFU;
buffer[9U] = (m_ssrc >> 16) & 0xFFU;
buffer[10U] = (m_ssrc >> 8) & 0xFFU;
buffer[11U] = (m_ssrc >> 0) & 0xFFU;
m_sessionId++;
buffer[12U] = m_sessionId;
buffer[13U] = 0x00U;
buffer[14U] = 0x00U;
buffer[15U] = 0x00U;
buffer[16U] = 0x01U;
buffer[17U] = 0x01U;
::memcpy(buffer + 18U, data, 24U);
if (m_debug)
CUtils::dump(1U, "Kenwood Network RTP Data Sent", buffer, 42U);
return m_rtpSocket.write(buffer, 42U, m_rtpAddr, m_rtpAddrLen);
}
bool CNXDNKenwoodNetwork::writeRTPDataTrailer(const unsigned char* data)
{
assert(data != NULL);
unsigned char buffer[50U];
::memset(buffer, 0x00U, 50U);
buffer[0U] = 0x80U;
buffer[1U] = 0x66U;
m_seqNo++;
buffer[2U] = (m_seqNo >> 8) & 0xFFU;
buffer[3U] = (m_seqNo >> 0) & 0xFFU;
unsigned long timeStamp = getTimeStamp();
buffer[4U] = (timeStamp >> 24) & 0xFFU;
buffer[5U] = (timeStamp >> 16) & 0xFFU;
buffer[6U] = (timeStamp >> 8) & 0xFFU;
buffer[7U] = (timeStamp >> 0) & 0xFFU;
buffer[8U] = (m_ssrc >> 24) & 0xFFU;
buffer[9U] = (m_ssrc >> 16) & 0xFFU;
buffer[10U] = (m_ssrc >> 8) & 0xFFU;
buffer[11U] = (m_ssrc >> 0) & 0xFFU;
m_sessionId++;
buffer[12U] = m_sessionId;
buffer[13U] = 0x00U;
buffer[14U] = 0x00U;
buffer[15U] = 0x00U;
buffer[16U] = 0x01U;
buffer[17U] = 0x06U;
::memcpy(buffer + 18U, data, 24U);
if (m_debug)
CUtils::dump(1U, "Kenwood Network RTP Data Sent", buffer, 42U);
return m_rtpSocket.write(buffer, 42U, m_rtpAddr, m_rtpAddrLen);
}
bool CNXDNKenwoodNetwork::writeRTPDataData(const unsigned char* data)
{
assert(data != NULL);
unsigned char buffer[50U];
::memset(buffer, 0x00U, 50U);
buffer[0U] = 0x80U;
buffer[1U] = 0x66U;
m_seqNo++;
buffer[2U] = (m_seqNo >> 8) & 0xFFU;
buffer[3U] = (m_seqNo >> 0) & 0xFFU;
unsigned long timeStamp = getTimeStamp();
buffer[4U] = (timeStamp >> 24) & 0xFFU;
buffer[5U] = (timeStamp >> 16) & 0xFFU;
buffer[6U] = (timeStamp >> 8) & 0xFFU;
buffer[7U] = (timeStamp >> 0) & 0xFFU;
buffer[8U] = (m_ssrc >> 24) & 0xFFU;
buffer[9U] = (m_ssrc >> 16) & 0xFFU;
buffer[10U] = (m_ssrc >> 8) & 0xFFU;
buffer[11U] = (m_ssrc >> 0) & 0xFFU;
m_sessionId++;
buffer[12U] = m_sessionId;
buffer[13U] = 0x00U;
buffer[14U] = 0x00U;
buffer[15U] = 0x00U;
buffer[16U] = 0x01U;
buffer[17U] = 0x01U;
::memcpy(buffer + 18U, data, 24U);
if (m_debug)
CUtils::dump(1U, "Kenwood Network RTP Data Sent", buffer, 42U);
return m_rtpSocket.write(buffer, 42U, m_rtpAddr, m_rtpAddrLen);
}
bool CNXDNKenwoodNetwork::writeRTCPStart()
{
#if defined(_WIN32) || defined(_WIN64)
time_t now;
::time(&now);
m_startSecs = uint32_t(now);
SYSTEMTIME st;
::GetSystemTime(&st);
m_startUSecs = st.wMilliseconds * 1000U;
#else
struct timeval tod;
::gettimeofday(&tod, NULL);
m_startSecs = tod.tv_sec;
m_startUSecs = tod.tv_usec;
#endif
unsigned char buffer[30U];
::memset(buffer, 0x00U, 30U);
buffer[0U] = 0x8AU;
buffer[1U] = 0xCCU;
buffer[2U] = 0x00U;
buffer[3U] = 0x06U;
buffer[4U] = (m_ssrc >> 24) & 0xFFU;
buffer[5U] = (m_ssrc >> 16) & 0xFFU;
buffer[6U] = (m_ssrc >> 8) & 0xFFU;
buffer[7U] = (m_ssrc >> 0) & 0xFFU;
buffer[8U] = 'K';
buffer[9U] = 'W';
buffer[10U] = 'N';
buffer[11U] = 'E';
buffer[12U] = (m_startSecs >> 24) & 0xFFU;
buffer[13U] = (m_startSecs >> 16) & 0xFFU;
buffer[14U] = (m_startSecs >> 8) & 0xFFU;
buffer[15U] = (m_startSecs >> 0) & 0xFFU;
buffer[16U] = (m_startUSecs >> 24) & 0xFFU;
buffer[17U] = (m_startUSecs >> 16) & 0xFFU;
buffer[18U] = (m_startUSecs >> 8) & 0xFFU;
buffer[19U] = (m_startUSecs >> 0) & 0xFFU;
buffer[22U] = 0x02U;
buffer[24U] = 0x01U;
buffer[27U] = 0x0AU;
if (m_debug)
CUtils::dump(1U, "Kenwood Network RTCP Data Sent", buffer, 28U);
return m_rtcpSocket.write(buffer, 28U, m_rtcpAddr, m_rtcpAddrLen);
}
bool CNXDNKenwoodNetwork::writeRTCPPing()
{
unsigned char buffer[30U];
::memset(buffer, 0x00U, 30U);
buffer[0U] = 0x8AU;
buffer[1U] = 0xCCU;
buffer[2U] = 0x00U;
buffer[3U] = 0x06U;
buffer[4U] = (m_ssrc >> 24) & 0xFFU;
buffer[5U] = (m_ssrc >> 16) & 0xFFU;
buffer[6U] = (m_ssrc >> 8) & 0xFFU;
buffer[7U] = (m_ssrc >> 0) & 0xFFU;
buffer[8U] = 'K';
buffer[9U] = 'W';
buffer[10U] = 'N';
buffer[11U] = 'E';
buffer[12U] = (m_startSecs >> 24) & 0xFFU;
buffer[13U] = (m_startSecs >> 16) & 0xFFU;
buffer[14U] = (m_startSecs >> 8) & 0xFFU;
buffer[15U] = (m_startSecs >> 0) & 0xFFU;
buffer[16U] = (m_startUSecs >> 24) & 0xFFU;
buffer[17U] = (m_startUSecs >> 16) & 0xFFU;
buffer[18U] = (m_startUSecs >> 8) & 0xFFU;
buffer[19U] = (m_startUSecs >> 0) & 0xFFU;
buffer[22U] = 0x02U;
buffer[24U] = 0x01U;
buffer[27U] = 0x7BU;
if (m_debug)
CUtils::dump(1U, "Kenwood Network RTCP Data Sent", buffer, 28U);
return m_rtcpSocket.write(buffer, 28U, m_rtcpAddr, m_rtcpAddrLen);
}
bool CNXDNKenwoodNetwork::writeRTCPHang(unsigned char type, unsigned short src, unsigned short dst)
{
m_hangType = type;
m_hangSrc = src;
m_hangDst = dst;
return writeRTCPHang();
}
bool CNXDNKenwoodNetwork::writeRTCPHang()
{
unsigned char buffer[30U];
::memset(buffer, 0x00U, 30U);
buffer[0U] = 0x8BU;
buffer[1U] = 0xCCU;
buffer[2U] = 0x00U;
buffer[3U] = 0x04U;
buffer[4U] = (m_ssrc >> 24) & 0xFFU;
buffer[5U] = (m_ssrc >> 16) & 0xFFU;
buffer[6U] = (m_ssrc >> 8) & 0xFFU;
buffer[7U] = (m_ssrc >> 0) & 0xFFU;
buffer[8U] = 'K';
buffer[9U] = 'W';
buffer[10U] = 'N';
buffer[11U] = 'E';
buffer[12U] = (m_hangSrc >> 8) & 0xFFU;
buffer[13U] = (m_hangSrc >> 0) & 0xFFU;
buffer[14U] = (m_hangDst >> 8) & 0xFFU;
buffer[15U] = (m_hangDst >> 0) & 0xFFU;
buffer[16U] = m_hangType;
if (m_debug)
CUtils::dump(1U, "Kenwood Network RTCP Data Sent", buffer, 20U);
return m_rtcpSocket.write(buffer, 20U, m_rtcpAddr, m_rtcpAddrLen);
}
bool CNXDNKenwoodNetwork::read(unsigned char* data)
{
assert(data != NULL);
unsigned char dummy[BUFFER_LENGTH];
readRTCP(dummy);
unsigned int len = readRTP(data);
switch (len) {
case 0U: // Nothing received
return false;
case 35U: // Voice header or trailer
return processKenwoodVoiceHeader(data);
case 47U: // Voice data
if (m_headerSeen)
return processKenwoodVoiceData(data);
else
return processKenwoodVoiceLateEntry(data);
case 31U: // Data
return processKenwoodData(data);
default:
CUtils::dump(5U, "Unknown data received from the Kenwood network", data, len);
return false;
}
}
unsigned int CNXDNKenwoodNetwork::readRTP(unsigned char* data)
{
assert(data != NULL);
unsigned char buffer[BUFFER_LENGTH];
sockaddr_storage address;
unsigned int addrLen;
int length = m_rtpSocket.read(buffer, BUFFER_LENGTH, address, addrLen);
if (length <= 0)
return 0U;
if (!CUDPSocket::match(m_rtpAddr, address, IMT_ADDRESS_ONLY)) {
LogMessage("NXDN, RTP packet received from an invalid source");
return 0U;
}
if (!m_enabled)
return 0U;
if (m_debug)
CUtils::dump(1U, "Kenwood Network RTP Data Received", buffer, length);
::memcpy(data, buffer + 12U, length - 12U);
return length - 12U;
}
unsigned int CNXDNKenwoodNetwork::readRTCP(unsigned char* data)
{
assert(data != NULL);
unsigned char buffer[BUFFER_LENGTH];
sockaddr_storage address;
unsigned int addrlen;
int length = m_rtcpSocket.read(buffer, BUFFER_LENGTH, address, addrlen);
if (length <= 0)
return 0U;
if (!CUDPSocket::match(m_rtpAddr, address, IMT_ADDRESS_ONLY)) {
LogMessage("NXDN, RTCP packet received from an invalid source");
return 0U;
}
if (!m_enabled)
return 0U;
if (m_debug)
CUtils::dump(1U, "Kenwood Network RTCP Data Received", buffer, length);
if (::memcmp(buffer + 8U, "KWNE", 4U) != 0) {
LogError("Missing RTCP KWNE signature");
return 0U;
}
::memcpy(data, buffer + 12U, length - 12U);
return length - 12U;
}
void CNXDNKenwoodNetwork::reset()
{
m_rtcpTimer.stop();
m_hangTimer.stop();
m_headerSeen = false;
m_seen1 = false;
m_seen2 = false;
m_seen3 = false;
m_seen4 = false;
}
bool CNXDNKenwoodNetwork::isConnected() const
{
return ((m_rtcpAddrLen != 0U) && (m_rtpAddrLen != 0U));
}
void CNXDNKenwoodNetwork::close()
{
m_rtcpSocket.close();
m_rtpSocket.close();
LogMessage("Closing Kenwood connection");
}
void CNXDNKenwoodNetwork::clock(unsigned int ms)
{
m_rtcpTimer.clock(ms);
if (m_rtcpTimer.isRunning() && m_rtcpTimer.hasExpired()) {
if (m_hangTimer.isRunning())
writeRTCPHang();
else
writeRTCPPing();
m_rtcpTimer.start();
}
m_hangTimer.clock(ms);
if (m_hangTimer.isRunning() && m_hangTimer.hasExpired()) {
m_rtcpTimer.stop();
m_hangTimer.stop();
}
}
bool CNXDNKenwoodNetwork::processKenwoodVoiceHeader(unsigned char* inData)
{
assert(inData != NULL);
unsigned char outData[50U], temp[20U];
::memset(outData, 0x00U, 50U);
// LICH
outData[0U] = 0x83U;
// SACCH
::memset(temp, 0x00U, 20U);
temp[0U] = inData[12U];
temp[1U] = inData[11U];
temp[2U] = inData[14U];
temp[3U] = inData[13U];
CNXDNCRC::encodeCRC6(temp, 26U);
::memcpy(outData + 1U, temp, 4U);
// FACCH 1+2
::memset(temp, 0x00U, 20U);
temp[0U] = inData[16U];
temp[1U] = inData[15U];
temp[2U] = inData[18U];
temp[3U] = inData[17U];
temp[4U] = inData[20U];
temp[5U] = inData[19U];
temp[6U] = inData[22U];
temp[7U] = inData[21U];
temp[8U] = inData[24U];
temp[9U] = inData[23U];
CNXDNCRC::encodeCRC12(temp, 80U);
::memcpy(outData + 5U, temp, 12U);
::memcpy(outData + 19U, temp, 12U);
switch (outData[5U] & 0x3FU) {
case 0x01U:
::memcpy(inData, outData, 33U);
m_headerSeen = true;
m_seen1 = false;
m_seen2 = false;
m_seen3 = false;
m_seen4 = false;
return true;
case 0x08U:
::memcpy(inData, outData, 33U);
m_headerSeen = false;
m_seen1 = false;
m_seen2 = false;
m_seen3 = false;
m_seen4 = false;
return true;
default:
return false;
}
}
bool CNXDNKenwoodNetwork::processKenwoodVoiceData(unsigned char* inData)
{
assert(inData != NULL);
unsigned char outData[50U], temp[20U];
::memset(outData, 0x00U, 50U);
// LICH
outData[0U] = 0xAEU;
// SACCH
::memset(temp, 0x00U, 20U);
temp[0U] = inData[12U];
temp[1U] = inData[11U];
temp[2U] = inData[14U];
temp[3U] = inData[13U];
CNXDNCRC::encodeCRC6(temp, 26U);
::memcpy(outData + 1U, temp, 4U);
// AMBE 1+2
unsigned int n = 5U * 8U;
temp[0U] = inData[16U];
temp[1U] = inData[15U];
temp[2U] = inData[18U];
temp[3U] = inData[17U];
temp[4U] = inData[20U];
temp[5U] = inData[19U];
temp[6U] = inData[22U];
temp[7U] = inData[21U];
for (unsigned int i = 0U; i < 49U; i++, n++) {
bool b = READ_BIT(temp, i);
WRITE_BIT(outData, n, b);
}
temp[0U] = inData[24U];
temp[1U] = inData[23U];
temp[2U] = inData[26U];
temp[3U] = inData[25U];
temp[4U] = inData[28U];
temp[5U] = inData[27U];
temp[6U] = inData[30U];
temp[7U] = inData[29U];
for (unsigned int i = 0U; i < 49U; i++, n++) {
bool b = READ_BIT(temp, i);
WRITE_BIT(outData, n, b);
}
// AMBE 3+4
n = 19U * 8U;
temp[0U] = inData[32U];
temp[1U] = inData[31U];
temp[2U] = inData[34U];
temp[3U] = inData[33U];
temp[4U] = inData[36U];
temp[5U] = inData[35U];
temp[6U] = inData[38U];
temp[7U] = inData[37U];
for (unsigned int i = 0U; i < 49U; i++, n++) {
bool b = READ_BIT(temp, i);
WRITE_BIT(outData, n, b);
}
temp[0U] = inData[40U];
temp[1U] = inData[39U];
temp[2U] = inData[42U];
temp[3U] = inData[41U];
temp[4U] = inData[44U];
temp[5U] = inData[43U];
temp[6U] = inData[46U];
temp[7U] = inData[45U];