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320 lines
7.1 KiB
320 lines
7.1 KiB
/*
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* Copyright (C) 2016 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 "YSFGateway.h"
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#include "StopWatch.h"
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#include "Version.h"
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#include "YSFFICH.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 = "YSFGateway.ini";
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#else
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const char* DEFAULT_INI_FILE = "/etc/YSFGateway.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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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, "YSFGateway 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: YSFGateway [-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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CYSFGateway* gateway = new CYSFGateway(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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CYSFGateway::CYSFGateway(const std::string& configFile) :
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m_conf(configFile),
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m_gps(NULL),
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m_hosts(NULL),
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m_wiresX(NULL),
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m_netNetwork(NULL),
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m_linked(false)
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{
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}
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CYSFGateway::~CYSFGateway()
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{
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}
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int CYSFGateway::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, "YSFGateway: cannot read the .ini file\n");
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return 1;
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}
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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, "YSFGateway: 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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} 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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std::string fileName = m_conf.getNetworkHosts();
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m_hosts = new CHosts(fileName);
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m_hosts->read();
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bool debug = m_conf.getNetworkDebug();
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unsigned int rptPort = m_conf.getPort();
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unsigned int netPort = m_conf.getNetworkPort();
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CNetwork rptNetwork(rptPort, debug);
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m_netNetwork = new CNetwork(netPort, debug);
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ret = rptNetwork.open();
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if (!ret) {
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::LogError("Cannot open the repeater network port");
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return 1;
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}
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ret = m_netNetwork->open();
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if (!ret) {
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::LogError("Cannot open the reflector network port");
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return 1;
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}
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bool networkEnabled = m_conf.getNetworkEnabled();
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if (networkEnabled)
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m_wiresX = new CWiresX(&rptNetwork);
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CStopWatch stopWatch;
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stopWatch.start();
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LogMessage("Starting YSFGateway-%s", VERSION);
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createGPS();
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CTimer watchdogTimer(1000U, 0U, 500U);
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for (;;) {
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unsigned char buffer[200U];
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unsigned int len = rptNetwork.read(buffer);
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if (len > 0U) {
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watchdogTimer.start();
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CYSFFICH fich;
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bool valid = fich.decode(buffer + 35U);
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if (valid) {
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unsigned char fi = fich.getFI();
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unsigned char dt = fich.getDT();
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unsigned char fn = fich.getFN();
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if (m_wiresX != NULL) {
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WX_STATUS status = m_wiresX->process(buffer + 35U, fi, dt, fn);
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switch (status) {
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case WXS_CONNECT:
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connect(buffer + 14U);
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break;
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case WXS_DISCONNECT:
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LogMessage("Disconnect has been requested by %10.10s", buffer + 14U);
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m_netNetwork->setDestination();
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m_linked = false;
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break;
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default:
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break;
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}
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}
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if (m_gps != NULL)
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m_gps->data(buffer + 14U, buffer + 35U, fi, dt, fn);
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if (fi == YSF_FI_TERMINATOR) {
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if (m_gps != NULL)
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m_gps->reset();
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watchdogTimer.stop();
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}
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}
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if (networkEnabled && m_linked)
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m_netNetwork->write(buffer);
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}
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len = m_netNetwork->read(buffer);
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if (len > 0U) {
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if (networkEnabled && m_linked)
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rptNetwork.write(buffer);
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}
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unsigned int ms = stopWatch.elapsed();
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stopWatch.start();
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rptNetwork.clock(ms);
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m_netNetwork->clock(ms);
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if (m_gps != NULL)
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m_gps->clock(ms);
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if (m_wiresX != NULL)
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m_wiresX->clock(ms);
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watchdogTimer.clock(ms);
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if (watchdogTimer.isRunning() && watchdogTimer.hasExpired()) {
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LogMessage("Network watchdog has expired");
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if (m_gps != NULL)
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m_gps->reset();
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watchdogTimer.stop();
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}
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if (ms < 5U) {
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#if defined(_WIN32) || defined(_WIN64)
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::Sleep(5UL); // 5ms
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#else
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::usleep(5000); // 5ms
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#endif
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}
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}
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rptNetwork.close();
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m_netNetwork->close();
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delete m_gps;
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delete m_hosts;
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delete m_netNetwork;
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delete m_wiresX;
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::LogFinalise();
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return 0;
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}
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void CYSFGateway::createGPS()
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{
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if (!m_conf.getAPRSEnabled())
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return;
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std::string hostname = m_conf.getAPRSHostname();
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unsigned int port = m_conf.getAPRSPort();
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std::string password = m_conf.getAPRSPassword();
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m_gps = new CGPS(hostname, port, password);
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}
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bool CYSFGateway::connect(const unsigned char* source)
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{
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std::string reflector = m_wiresX->getReflector();
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CYSFHost* host = m_hosts->find(reflector);
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if (host == NULL) {
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LogMessage("Request made for invalid reflector %s by %10.10s", reflector.c_str(), source);
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return false;
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}
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std::string address = host->m_address;
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unsigned int port = host->m_port;
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in_addr addr = CUDPSocket::lookup(address);
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if (addr.s_addr == INADDR_NONE)
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return false;
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LogMessage("Connect to %s has been requested by %10.10s", reflector.c_str(), source);
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m_netNetwork->setDestination(addr, port);
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m_linked = true;
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}
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