NXDNClients/NXDNGateway/APRSWriter.cpp

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/*
* Copyright (C) 2010-2014,2016,2017,2018 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 "APRSWriter.h"
#include <cstdio>
#include <cassert>
#include <cstring>
#include <cmath>
CAPRSWriter::CAPRSWriter(const std::string& callsign, const std::string& suffix, const std::string& password, const std::string& address, unsigned int port) :
m_thread(NULL),
m_enabled(false),
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m_idTimer(1000U),
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m_callsign(callsign),
m_txFrequency(0U),
m_rxFrequency(0U),
m_latitude(0.0F),
m_longitude(0.0F),
m_height(0),
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m_desc(),
m_mobileGPSAddress(),
m_mobileGPSPort(0U),
m_socket(NULL)
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{
assert(!callsign.empty());
assert(!password.empty());
assert(!address.empty());
assert(port > 0U);
if (!suffix.empty()) {
m_callsign.append("-");
m_callsign.append(suffix.substr(0U, 1U));
}
m_thread = new CAPRSWriterThread(m_callsign, password, address, port);
}
CAPRSWriter::~CAPRSWriter()
{
}
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void CAPRSWriter::setInfo(unsigned int txFrequency, unsigned int rxFrequency, const std::string& desc)
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{
m_txFrequency = txFrequency;
m_rxFrequency = rxFrequency;
m_desc = desc;
}
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void CAPRSWriter::setStaticLocation(float latitude, float longitude, int height)
{
m_latitude = latitude;
m_longitude = longitude;
m_height = height;
}
void CAPRSWriter::setMobileLocation(const std::string& address, unsigned int port)
{
assert(!address.empty());
assert(port > 0U);
m_mobileGPSAddress = CUDPSocket::lookup(address);
m_mobileGPSPort = port;
m_socket = new CUDPSocket;
}
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bool CAPRSWriter::open()
{
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if (m_socket != NULL) {
bool ret = m_socket->open();
if (!ret) {
delete m_socket;
m_socket = NULL;
return false;
}
// Poll the GPS every minute
m_idTimer.setTimeout(60U);
} else {
m_idTimer.setTimeout(20U * 60U);
}
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m_idTimer.start();
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return m_thread->start();
}
void CAPRSWriter::write(const char* data)
{
assert(data != NULL);
m_thread->write(data);
}
void CAPRSWriter::clock(unsigned int ms)
{
m_idTimer.clock(ms);
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if (m_socket != NULL) {
if (m_idTimer.hasExpired()) {
pollGPS();
m_idTimer.start();
}
sendIdFrameMobile();
} else {
if (m_idTimer.hasExpired()) {
sendIdFrameFixed();
m_idTimer.start();
}
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}
}
void CAPRSWriter::close()
{
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if (m_socket != NULL) {
m_socket->close();
delete m_socket;
}
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m_thread->stop();
}
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bool CAPRSWriter::pollGPS()
{
assert(m_socket != NULL);
return m_socket->write((unsigned char*)"NXDNGateway", 11U, m_mobileGPSAddress, m_mobileGPSPort);
}
void CAPRSWriter::sendIdFrameFixed()
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{
if (!m_thread->isConnected())
return;
// Default values aren't passed on
if (m_latitude == 0.0F && m_longitude == 0.0F)
return;
char desc[200U];
if (m_txFrequency != 0U) {
float offset = float(int(m_rxFrequency) - int(m_txFrequency)) / 1000000.0F;
::sprintf(desc, "MMDVM Voice %.5LfMHz %c%.4lfMHz%s%s",
(long double)(m_txFrequency) / 1000000.0F,
offset < 0.0F ? '-' : '+',
::fabs(offset), m_desc.empty() ? "" : ", ", m_desc.c_str());
} else {
::sprintf(desc, "MMDVM Voice%s%s", m_desc.empty() ? "" : ", ", m_desc.c_str());
}
const char* band = "4m";
if (m_txFrequency >= 1200000000U)
band = "1.2";
else if (m_txFrequency >= 420000000U)
band = "440";
else if (m_txFrequency >= 144000000U)
band = "2m";
else if (m_txFrequency >= 50000000U)
band = "6m";
else if (m_txFrequency >= 28000000U)
band = "10m";
double tempLat = ::fabs(m_latitude);
double tempLong = ::fabs(m_longitude);
double latitude = ::floor(tempLat);
double longitude = ::floor(tempLong);
latitude = (tempLat - latitude) * 60.0 + latitude * 100.0;
longitude = (tempLong - longitude) * 60.0 + longitude * 100.0;
char lat[20U];
::sprintf(lat, "%07.2lf", latitude);
char lon[20U];
::sprintf(lon, "%08.2lf", longitude);
std::string server = m_callsign;
size_t pos = server.find_first_of('-');
if (pos == std::string::npos)
server.append("-S");
else
server.append("S");
char output[500U];
::sprintf(output, "%s>APDG04,TCPIP*,qAC,%s:!%s%cD%s%c&/A=%06.0f%s %s",
m_callsign.c_str(), server.c_str(),
lat, (m_latitude < 0.0F) ? 'S' : 'N',
lon, (m_longitude < 0.0F) ? 'W' : 'E',
float(m_height) * 3.28F, band, desc);
m_thread->write(output);
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}
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void CAPRSWriter::sendIdFrameMobile()
{
// Grab GPS data if it's available
unsigned char buffer[200U];
in_addr address;
unsigned int port;
int ret = m_socket->read(buffer, 200U, address, port);
if (ret <= 0)
return;
if (!m_thread->isConnected())
return;
buffer[ret] = '\0';
// Parse the GPS data
char* pLatitude = ::strtok((char*)buffer, ",\n"); // Latitude
char* pLongitude = ::strtok(NULL, ",\n"); // Longitude
char* pAltitude = ::strtok(NULL, ",\n"); // Altitude (m)
char* pVelocity = ::strtok(NULL, ",\n"); // Velocity (kms/h)
char* pBearing = ::strtok(NULL, "\n"); // Bearing
if (pLatitude == NULL || pLongitude == NULL || pAltitude == NULL)
return;
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float rawLatitude = float(::atof(pLatitude));
float rawLongitude = float(::atof(pLongitude));
float rawAltitude = float(::atof(pAltitude));
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char desc[200U];
if (m_txFrequency != 0U) {
float offset = float(int(m_rxFrequency) - int(m_txFrequency)) / 1000000.0F;
::sprintf(desc, "MMDVM Voice %.5LfMHz %c%.4lfMHz%s%s",
(long double)(m_txFrequency) / 1000000.0F,
offset < 0.0F ? '-' : '+',
::fabs(offset), m_desc.empty() ? "" : ", ", m_desc.c_str());
} else {
::sprintf(desc, "MMDVM Voice%s%s", m_desc.empty() ? "" : ", ", m_desc.c_str());
}
const char* band = "4m";
if (m_txFrequency >= 1200000000U)
band = "1.2";
else if (m_txFrequency >= 420000000U)
band = "440";
else if (m_txFrequency >= 144000000U)
band = "2m";
else if (m_txFrequency >= 50000000U)
band = "6m";
else if (m_txFrequency >= 28000000U)
band = "10m";
double tempLat = ::fabs(rawLatitude);
double tempLong = ::fabs(rawLongitude);
double latitude = ::floor(tempLat);
double longitude = ::floor(tempLong);
latitude = (tempLat - latitude) * 60.0 + latitude * 100.0;
longitude = (tempLong - longitude) * 60.0 + longitude * 100.0;
char lat[20U];
::sprintf(lat, "%07.2lf", latitude);
char lon[20U];
::sprintf(lon, "%08.2lf", longitude);
std::string server = m_callsign;
size_t pos = server.find_first_of('-');
if (pos == std::string::npos)
server.append("-S");
else
server.append("S");
char output[500U];
::sprintf(output, "%s>APDG03,TCPIP*,qAC,%s:!%s%cD%s%c&",
m_callsign.c_str(), server.c_str(),
lat, (rawLatitude < 0.0F) ? 'S' : 'N',
lon, (rawLongitude < 0.0F) ? 'W' : 'E');
if (pBearing != NULL && pVelocity != NULL) {
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float rawBearing = float(::atof(pBearing));
float rawVelocity = float(::atof(pVelocity));
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::sprintf(output + ::strlen(output), "%03.0f/%03.0f", rawBearing, rawVelocity * 0.539957F);
}
::sprintf(output + ::strlen(output), "/A=%06.0f%s %s", float(rawAltitude) * 3.28F, band, desc);
m_thread->write(output);
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}
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