mirror of
https://github.com/g4klx/DAPNETGateway.git
synced 2026-08-26 12:32:45 -04:00
324 lines
7.1 KiB
C++
324 lines
7.1 KiB
C++
/*
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* Copyright (C) 2018 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 "DAPNETGateway.h"
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#include "StopWatch.h"
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#include "Version.h"
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#include "Thread.h"
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#include "Timer.h"
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#include "Log.h"
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#if defined(_WIN32) || defined(_WIN64)
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#include <Windows.h>
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#else
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#include <sys/time.h>
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#include <unistd.h>
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#include <signal.h>
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#include <fcntl.h>
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#include <pwd.h>
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#endif
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#if defined(_WIN32) || defined(_WIN64)
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const char* DEFAULT_INI_FILE = "DAPNETGateway.ini";
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#else
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const char* DEFAULT_INI_FILE = "/etc/DAPNETGateway.ini";
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#endif
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#include <cstdio>
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#include <cstdlib>
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#include <cstring>
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#include <clocale>
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#include <cassert>
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#include <cmath>
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const unsigned int FRAME_TIME = 1000U * (17U * 32U) / 1200U;
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int main(int argc, char** argv)
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{
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const char* iniFile = DEFAULT_INI_FILE;
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if (argc > 1) {
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for (int currentArg = 1; currentArg < argc; ++currentArg) {
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std::string arg = argv[currentArg];
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if ((arg == "-v") || (arg == "--version")) {
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::fprintf(stdout, "DAPNETGateway version %s\n", VERSION);
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return 0;
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} else if (arg.substr(0, 1) == "-") {
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::fprintf(stderr, "Usage: DAPNETGateway [-v|--version] [filename]\n");
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return 1;
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} else {
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iniFile = argv[currentArg];
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}
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}
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}
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CDAPNETGateway* gateway = new CDAPNETGateway(std::string(iniFile));
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int ret = gateway->run();
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delete gateway;
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return ret;
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}
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CDAPNETGateway::CDAPNETGateway(const std::string& configFile) :
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m_conf(configFile),
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m_dapnetNetwork(NULL),
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m_pocsagNetwork(NULL),
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m_queue()
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{
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}
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CDAPNETGateway::~CDAPNETGateway()
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{
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// XXX Free any data in the queue
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}
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int CDAPNETGateway::run()
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{
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bool ret = m_conf.read();
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if (!ret) {
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::fprintf(stderr, "DAPNETGateway: cannot read the .ini file\n");
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return 1;
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}
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setlocale(LC_ALL, "C");
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ret = ::LogInitialise(m_conf.getLogFilePath(), m_conf.getLogFileRoot(), m_conf.getLogFileLevel(), m_conf.getLogDisplayLevel());
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if (!ret) {
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::fprintf(stderr, "DAPNETGateway: unable to open the log file\n");
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return 1;
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}
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#if !defined(_WIN32) && !defined(_WIN64)
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bool m_daemon = m_conf.getDaemon();
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if (m_daemon) {
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// Create new process
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pid_t pid = ::fork();
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if (pid == -1) {
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::LogWarning("Couldn't fork() , exiting");
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return -1;
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}
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else if (pid != 0)
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exit(EXIT_SUCCESS);
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// Create new session and process group
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if (::setsid() == -1) {
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::LogWarning("Couldn't setsid(), exiting");
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return -1;
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}
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// Set the working directory to the root directory
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if (::chdir("/") == -1) {
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::LogWarning("Couldn't cd /, exiting");
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return -1;
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}
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::close(STDIN_FILENO);
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::close(STDOUT_FILENO);
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::close(STDERR_FILENO);
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//If we are currently root...
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if (getuid() == 0) {
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struct passwd* user = ::getpwnam("mmdvm");
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if (user == NULL) {
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::LogError("Could not get the mmdvm user, exiting");
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return -1;
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}
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uid_t mmdvm_uid = user->pw_uid;
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gid_t mmdvm_gid = user->pw_gid;
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//Set user and group ID's to mmdvm:mmdvm
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if (setgid(mmdvm_gid) != 0) {
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::LogWarning("Could not set mmdvm GID, exiting");
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return -1;
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}
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if (setuid(mmdvm_uid) != 0) {
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::LogWarning("Could not set mmdvm UID, exiting");
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return -1;
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}
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//Double check it worked (AKA Paranoia)
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if (setuid(0) != -1) {
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::LogWarning("It's possible to regain root - something is wrong!, exiting");
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return -1;
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}
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}
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}
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#endif
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bool debug = m_conf.getDAPNETDebug();
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std::string rptAddress = m_conf.getRptAddress();
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unsigned int rptPort = m_conf.getRptPort();
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std::string myAddress = m_conf.getMyAddress();
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unsigned int myPort = m_conf.getMyPort();
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m_pocsagNetwork = new CPOCSAGNetwork(myAddress, myPort, rptAddress, rptPort, debug);
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ret = m_pocsagNetwork->open();
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if (!ret) {
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::LogError("Cannot open the repeater network port");
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::LogFinalise();
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return 1;
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}
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std::string callsign = m_conf.getCallsign();
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std::string dapnetAddress = m_conf.getDAPNETAddress();
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unsigned int dapnetPort = m_conf.getDAPNETPort();
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std::string dapnetAuthKey = m_conf.getDAPNETAuthKey();
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m_dapnetNetwork = new CDAPNETNetwork(dapnetAddress, dapnetPort, callsign, dapnetAuthKey, VERSION, debug);
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ret = m_dapnetNetwork->open();
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if (!ret) {
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m_pocsagNetwork->close();
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delete m_pocsagNetwork;
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delete m_dapnetNetwork;
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::LogError("Cannot open the DAPNET network port");
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::LogFinalise();
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return 1;
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}
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ret = m_dapnetNetwork->login();
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if (!ret) {
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m_pocsagNetwork->close();
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m_dapnetNetwork->close();
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delete m_pocsagNetwork;
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delete m_dapnetNetwork;
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::LogError("Cannot login to the DAPNET network");
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::LogFinalise();
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return 1;
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}
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::LogMessage("Logged into the DAPNET network");
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CTimer messageTimer(1000U, 0U, FRAME_TIME);
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CStopWatch stopWatch;
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stopWatch.start();
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unsigned int calls = 0U;
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bool tx = false;
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LogMessage("Starting DAPNETGateway-%s", VERSION);
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for (;;) {
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unsigned char buffer[200U];
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if (m_pocsagNetwork->read(buffer) > 0U) {
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switch (buffer[0U]) {
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case 0x00U:
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// The MMDVM is idle
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messageTimer.start();
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break;
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case 0xFFU:
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// The MMDVM is busy
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messageTimer.stop();
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break;
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default:
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// The MMDVM is sending crap
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LogWarning("Unknown data from the MMDVM - 0x%02X", buffer[0U]);
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break;
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}
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}
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bool ok = m_dapnetNetwork->read();
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if (!ok)
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recover();
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CPOCSAGMessage* message = m_dapnetNetwork->readMessage();
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if (message != NULL) {
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LogDebug("Queueing message to %07d: \"%.*s\"", message->m_ric, message->m_length, message->m_message);
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m_queue.push_front(message);
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}
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unsigned int ms = stopWatch.elapsed();
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stopWatch.start();
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messageTimer.clock(ms);
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if (messageTimer.isRunning() && messageTimer.hasExpired()) {
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if (!m_queue.empty()) {
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if (!tx)
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calls = 0U;
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tx = true;
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sendData();
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calls++;
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} else {
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if (tx)
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LogMessage("Sent %u messages within that batch", calls);
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tx = false;
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}
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messageTimer.start();
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}
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if (ms < 5U)
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CThread::sleep(5U);
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}
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m_pocsagNetwork->close();
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delete m_pocsagNetwork;
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m_dapnetNetwork->close();
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delete m_dapnetNetwork;
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::LogFinalise();
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return 0;
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}
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bool CDAPNETGateway::sendData()
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{
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assert(m_pocsagNetwork != NULL);
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if (!m_queue.empty()) {
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CPOCSAGMessage* message = m_queue.back();
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m_queue.pop_back();
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LogDebug("Sending message to %06X: \"%.*s\"", message->m_ric, message->m_length, message->m_message);
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m_pocsagNetwork->write(message);
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delete message;
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return true;
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}
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return false;
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}
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bool CDAPNETGateway::recover()
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{
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for (;;) {
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m_dapnetNetwork->close();
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bool ok = m_dapnetNetwork->open();
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if (ok) {
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ok = m_dapnetNetwork->login();
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if (ok)
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return true;
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}
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}
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return false;
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}
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