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319 lines
7.9 KiB
319 lines
7.9 KiB
/*
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* Copyright (C) 2010-2014,2018,2020 by Jonathan Naylor G4KLX
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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; either version 2 of the License, or
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* (at your option) any later version.
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <cassert>
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#include <sstream>
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#include <iostream>
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#include <boost/algorithm/string.hpp>
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#include "APRSISHandlerThread.h"
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#include "DStarDefines.h"
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#include "Utils.h"
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#include "Defs.h"
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#include "Log.h"
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#include "Version.h"
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#include "APRSFormater.h"
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#include "APRSParser.h"
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// #define DUMP_TX
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const unsigned int APRS_TIMEOUT = 10U;
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const unsigned int APRS_READ_TIMEOUT = 1U;
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const unsigned int APRS_KEEP_ALIVE_TIMEOUT = 60U;
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CAPRSISHandlerThread::CAPRSISHandlerThread(const std::string& callsign, const std::string& password, const std::string& address, const std::string& hostname, unsigned int port) :
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CThread("APRS"),
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m_username(callsign),
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m_password(password),
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m_ssid(callsign),
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m_socket(hostname, port, address),
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m_queue(20U),
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m_exit(false),
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m_connected(false),
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m_reconnectTimer(1000U),
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m_keepAliveTimer(1000U, APRS_KEEP_ALIVE_TIMEOUT),
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m_tries(0U),
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m_APRSReadCallbacks(),
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m_filter(),
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m_clientName(FULL_PRODUCT_NAME)
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{
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assert(!callsign.empty());
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assert(!password.empty());
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assert(!hostname.empty());
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assert(port > 0U);
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m_username[LONG_CALLSIGN_LENGTH - 1U] = ' ';
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boost::trim(m_username);
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boost::to_upper(m_username);
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m_ssid = m_ssid.substr(LONG_CALLSIGN_LENGTH - 1U, 1);
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}
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CAPRSISHandlerThread::CAPRSISHandlerThread(const std::string& callsign, const std::string& password, const std::string& address, const std::string& hostname, unsigned int port, const std::string& filter) :
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CThread("APRS"),
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m_username(callsign),
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m_password(password),
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m_ssid(callsign),
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m_socket(hostname, port, address),
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m_queue(20U),
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m_exit(false),
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m_connected(false),
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m_reconnectTimer(1000U),
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m_keepAliveTimer(1000U, APRS_KEEP_ALIVE_TIMEOUT),
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m_tries(0U),
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m_APRSReadCallbacks(),
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m_filter(filter),
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m_clientName(FULL_PRODUCT_NAME)
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{
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assert(!callsign.empty());
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assert(!password.empty());
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assert(!hostname.empty());
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assert(port > 0U);
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m_username[LONG_CALLSIGN_LENGTH - 1U] = ' ';
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boost::trim(m_username);
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boost::to_upper(m_username);
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m_ssid = m_ssid.substr(LONG_CALLSIGN_LENGTH - 1U, 1);
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}
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CAPRSISHandlerThread::~CAPRSISHandlerThread()
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{
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std::vector<IReadAPRSFrameCallback *> callBacksCopy;
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callBacksCopy.assign(m_APRSReadCallbacks.begin(), m_APRSReadCallbacks.end());
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m_APRSReadCallbacks.clear();
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callBacksCopy.clear();
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m_username.clear();
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m_password.clear();
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}
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bool CAPRSISHandlerThread::start()
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{
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Create();
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Run();
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return true;
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}
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void* CAPRSISHandlerThread::Entry()
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{
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CLog::logInfo("Starting the APRS Writer thread");
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m_connected = connect();
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if (!m_connected) {
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CLog::logInfo("Connect attempt to the APRS server has failed");
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startReconnectionTimer();
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}
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#ifndef DEBUG_DSTARGW
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try {
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#endif
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m_keepAliveTimer.start();
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while (!m_exit) {
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if (!m_connected) {
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Sleep(100U);
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if (m_reconnectTimer.isRunning() && m_reconnectTimer.hasExpired()) {
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m_reconnectTimer.stop();
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CLog::logDebug("Trying to reconnect to the APRS server");
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m_connected = connect();
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if (!m_connected) {
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CLog::logInfo("Reconnect attempt to the APRS server has failed");
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startReconnectionTimer();
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}
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else {
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m_keepAliveTimer.start();
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}
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}
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}
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if (m_connected) {
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m_tries = 0U;
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if(!m_queue.empty()){
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auto frameStr = m_queue.getData();
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CLog::logInfo("APRS Frame sent to IS ==> %s", frameStr.c_str());
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bool ret = m_socket.writeLine(frameStr);
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if (!ret) {
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m_connected = false;
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m_socket.close();
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CLog::logInfo("Error when writing to the APRS server");
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startReconnectionTimer();
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}
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}
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{
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std::string line;
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int length = m_socket.readLine(line, APRS_READ_TIMEOUT);
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if (length < 0 || m_keepAliveTimer.hasExpired()) {
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m_connected = false;
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m_socket.close();
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CLog::logError("Error when reading from the APRS server");
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startReconnectionTimer();
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}
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else if(length > 0 && line[0] == '#') {
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m_keepAliveTimer.start();
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}
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else if(line.length() > 0 && line[0] != '#') {
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m_keepAliveTimer.start();
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CLog::logDebug("APRS Frame received from IS <== %s", line.c_str());
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CAPRSFrame readFrame;
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if(CAPRSParser::parseFrame(line, readFrame)) {
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for(auto cb : m_APRSReadCallbacks) {
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CAPRSFrame f(readFrame);
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cb->readAPRSFrame(f);
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}
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}
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}
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}
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}
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}
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if (m_connected)
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m_socket.close();
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while (!m_queue.empty()) {
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auto s = m_queue.getData();
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s.clear();
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}
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#ifndef DEBUG_DSTARGW
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}
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catch (std::exception& e) {
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std::string message(e.what());
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CLog::logInfo("Exception raised in the APRS Writer thread - \"%s\"", message.c_str());
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throw;
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}
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catch (...) {
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CLog::logInfo("Unknown exception raised in the APRS Writer thread");
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throw;
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}
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#endif
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CLog::logInfo("Stopping the APRS Writer thread");
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return NULL;
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}
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void CAPRSISHandlerThread::addReadAPRSCallback(IReadAPRSFrameCallback * cb)
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{
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assert(cb != nullptr);
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m_APRSReadCallbacks.push_back(cb);
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}
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void CAPRSISHandlerThread::write(CAPRSFrame& frame)
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{
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if (!m_connected)
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return;
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std::string frameString;
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if(CAPRSFormater::frameToString(frameString, frame)) {
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boost::trim_if(frameString, [] (char c) { return c == '\r' || c == '\n'; }); // trim all CRLF, we will add our own, just to make sure we get rid of any garbage that might come from slow data
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CLog::logTrace("Queued APRS Frame : %s", frameString.c_str());
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frameString.append("\r\n");
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m_queue.addData(frameString);
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}
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}
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bool CAPRSISHandlerThread::isConnected() const
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{
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return m_connected;
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}
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void CAPRSISHandlerThread::stop()
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{
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m_exit = true;
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Wait();
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}
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void CAPRSISHandlerThread::clock(unsigned int ms)
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{
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m_reconnectTimer.clock(ms);
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m_keepAliveTimer.clock(ms);
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}
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bool CAPRSISHandlerThread::connect()
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{
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m_socket.close();
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bool ret = m_socket.open();
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if (!ret)
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return false;
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//wait for lgin banner
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int length;
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std::string serverResponse("");
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length = m_socket.readLine(serverResponse, APRS_TIMEOUT);
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if (length == 0) {
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CLog::logInfo("No reply from the APRS server after %u seconds", APRS_TIMEOUT);
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m_socket.close();
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return false;
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}
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CLog::logInfo("Received login banner : %s", serverResponse.c_str());
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std::string filter(m_filter);
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if (filter.length() > 0) filter = " filter " + filter;
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std::stringstream connectString;
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connectString << "User " << m_username << "-" << m_ssid
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<< " pass " << m_password
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<< " vers " << (!m_clientName.empty() ? m_clientName : FULL_PRODUCT_NAME)
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<< filter;
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//CLog::logInfo("Connect String : ") + connectString);
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ret = m_socket.writeLine(connectString.str());
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if (!ret) {
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m_socket.close();
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return false;
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}
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length = m_socket.readLine(serverResponse, APRS_TIMEOUT);
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if (length == 0) {
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CLog::logInfo("No reply from the APRS server after %u seconds", APRS_TIMEOUT);
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m_socket.close();
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return false;
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}
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if (length < 0) {
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CLog::logInfo("Error when reading from the APRS server (connect)");
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m_socket.close();
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return false;
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}
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CLog::logInfo("Response from APRS server: %s", serverResponse.c_str());
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CLog::logInfo("Connected to the APRS server");
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return true;
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}
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void CAPRSISHandlerThread::startReconnectionTimer()
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{
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// Clamp at a ten minutes reconnect time
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m_tries++;
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if (m_tries > 10U)
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m_tries = 10U;
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CLog::logDebug("Next APRS reconnection try in %u minute", m_tries);
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m_reconnectTimer.setTimeout(m_tries * 60U);
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m_reconnectTimer.start();
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}
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