mirror of
https://github.com/ShaYmez/P25Clients.git
synced 2024-11-25 13:48:45 -05:00
430 lines
11 KiB
C++
430 lines
11 KiB
C++
/*
|
|
* Copyright (C) 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 "P25Gateway.h"
|
|
#include "Reflectors.h"
|
|
#include "StopWatch.h"
|
|
#include "DMRLookup.h"
|
|
#include "Network.h"
|
|
#include "Version.h"
|
|
#include "Thread.h"
|
|
#include "Speech.h"
|
|
#include "Timer.h"
|
|
#include "Log.h"
|
|
|
|
#if defined(_WIN32) || defined(_WIN64)
|
|
#include <Windows.h>
|
|
#else
|
|
#include <sys/socket.h>
|
|
#include <netinet/in.h>
|
|
#include <arpa/inet.h>
|
|
#include <sys/time.h>
|
|
#include <sys/types.h>
|
|
#include <unistd.h>
|
|
#include <signal.h>
|
|
#include <fcntl.h>
|
|
#include <pwd.h>
|
|
#endif
|
|
|
|
#if defined(_WIN32) || defined(_WIN64)
|
|
const char* DEFAULT_INI_FILE = "P25Gateway.ini";
|
|
#else
|
|
const char* DEFAULT_INI_FILE = "/etc/P25Gateway.ini";
|
|
#endif
|
|
|
|
#include <cstdio>
|
|
#include <cstdlib>
|
|
#include <cstdarg>
|
|
#include <ctime>
|
|
#include <cstring>
|
|
|
|
int main(int argc, char** argv)
|
|
{
|
|
const char* iniFile = DEFAULT_INI_FILE;
|
|
if (argc > 1) {
|
|
for (int currentArg = 1; currentArg < argc; ++currentArg) {
|
|
std::string arg = argv[currentArg];
|
|
if ((arg == "-v") || (arg == "--version")) {
|
|
::fprintf(stdout, "P25Gateway version %s\n", VERSION);
|
|
return 0;
|
|
} else if (arg.substr(0, 1) == "-") {
|
|
::fprintf(stderr, "Usage: P25Gateway [-v|--version] [filename]\n");
|
|
return 1;
|
|
} else {
|
|
iniFile = argv[currentArg];
|
|
}
|
|
}
|
|
}
|
|
|
|
CP25Gateway* gateway = new CP25Gateway(std::string(iniFile));
|
|
gateway->run();
|
|
delete gateway;
|
|
|
|
return 0;
|
|
}
|
|
|
|
CP25Gateway::CP25Gateway(const std::string& file) :
|
|
m_conf(file)
|
|
{
|
|
}
|
|
|
|
CP25Gateway::~CP25Gateway()
|
|
{
|
|
}
|
|
|
|
void CP25Gateway::run()
|
|
{
|
|
bool ret = m_conf.read();
|
|
if (!ret) {
|
|
::fprintf(stderr, "P25Gateway: cannot read the .ini file\n");
|
|
return;
|
|
}
|
|
|
|
#if !defined(_WIN32) && !defined(_WIN64)
|
|
bool m_daemon = m_conf.getDaemon();
|
|
if (m_daemon) {
|
|
// Create new process
|
|
pid_t pid = ::fork();
|
|
if (pid == -1) {
|
|
::fprintf(stderr, "Couldn't fork() , exiting\n");
|
|
return;
|
|
} else if (pid != 0) {
|
|
exit(EXIT_SUCCESS);
|
|
}
|
|
|
|
// Create new session and process group
|
|
if (::setsid() == -1) {
|
|
::fprintf(stderr, "Couldn't setsid(), exiting\n");
|
|
return;
|
|
}
|
|
|
|
// Set the working directory to the root directory
|
|
if (::chdir("/") == -1) {
|
|
::fprintf(stderr, "Couldn't cd /, exiting\n");
|
|
return;
|
|
}
|
|
|
|
// If we are currently root...
|
|
if (getuid() == 0) {
|
|
struct passwd* user = ::getpwnam("mmdvm");
|
|
if (user == NULL) {
|
|
::fprintf(stderr, "Could not get the mmdvm user, exiting\n");
|
|
return;
|
|
}
|
|
|
|
uid_t mmdvm_uid = user->pw_uid;
|
|
gid_t mmdvm_gid = user->pw_gid;
|
|
|
|
// Set user and group ID's to mmdvm:mmdvm
|
|
if (setgid(mmdvm_gid) != 0) {
|
|
::fprintf(stderr, "Could not set mmdvm GID, exiting\n");
|
|
return;
|
|
}
|
|
|
|
if (setuid(mmdvm_uid) != 0) {
|
|
::fprintf(stderr, "Could not set mmdvm UID, exiting\n");
|
|
return;
|
|
}
|
|
|
|
// Double check it worked (AKA Paranoia)
|
|
if (setuid(0) != -1) {
|
|
::fprintf(stderr, "It's possible to regain root - something is wrong!, exiting\n");
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
ret = ::LogInitialise(m_conf.getLogFilePath(), m_conf.getLogFileRoot(), 1U, 1U);
|
|
if (!ret) {
|
|
::fprintf(stderr, "P25Gateway: unable to open the log file\n");
|
|
return;
|
|
}
|
|
|
|
#if !defined(_WIN32) && !defined(_WIN64)
|
|
if (m_daemon) {
|
|
::close(STDIN_FILENO);
|
|
::close(STDOUT_FILENO);
|
|
::close(STDERR_FILENO);
|
|
}
|
|
#endif
|
|
|
|
in_addr rptAddr = CUDPSocket::lookup(m_conf.getRptAddress());
|
|
unsigned int rptPort = m_conf.getRptPort();
|
|
|
|
CNetwork localNetwork(m_conf.getMyPort(), m_conf.getCallsign(), false);
|
|
ret = localNetwork.open();
|
|
if (!ret) {
|
|
::LogFinalise();
|
|
return;
|
|
}
|
|
|
|
CNetwork remoteNetwork(m_conf.getNetworkPort(), m_conf.getCallsign(), m_conf.getNetworkDebug());
|
|
ret = remoteNetwork.open();
|
|
if (!ret) {
|
|
localNetwork.close();
|
|
::LogFinalise();
|
|
return;
|
|
}
|
|
|
|
CReflectors reflectors(m_conf.getNetworkHosts1(), m_conf.getNetworkHosts2(), m_conf.getNetworkReloadTime());
|
|
if (m_conf.getNetworkParrotPort() > 0U)
|
|
reflectors.setParrot(m_conf.getNetworkParrotAddress(), m_conf.getNetworkParrotPort());
|
|
reflectors.load();
|
|
|
|
CDMRLookup* lookup = new CDMRLookup(m_conf.getLookupName(), m_conf.getLookupTime());
|
|
lookup->read();
|
|
|
|
CTimer inactivityTimer(1000U, m_conf.getNetworkInactivityTimeout() * 60U);
|
|
CTimer lostTimer(1000U, 120U);
|
|
CTimer pollTimer(1000U, 5U);
|
|
|
|
CStopWatch stopWatch;
|
|
stopWatch.start();
|
|
|
|
CSpeech* speech = NULL;
|
|
if (m_conf.getAnnouncements())
|
|
speech = new CSpeech(localNetwork, rptAddr, rptPort);
|
|
|
|
LogMessage("Starting P25Gateway-%s", VERSION);
|
|
|
|
unsigned int srcId = 0U;
|
|
unsigned int dstId = 0U;
|
|
|
|
unsigned int currentId = 9999U;
|
|
in_addr currentAddr;
|
|
unsigned int currentPort = 0U;
|
|
|
|
unsigned int startupId = m_conf.getNetworkStartup();
|
|
if (startupId != 9999U) {
|
|
CP25Reflector* reflector = reflectors.find(startupId);
|
|
if (reflector != NULL) {
|
|
currentId = startupId;
|
|
currentAddr = reflector->m_address;
|
|
currentPort = reflector->m_port;
|
|
|
|
inactivityTimer.start();
|
|
pollTimer.start();
|
|
lostTimer.start();
|
|
|
|
remoteNetwork.writePoll(currentAddr, currentPort);
|
|
remoteNetwork.writePoll(currentAddr, currentPort);
|
|
remoteNetwork.writePoll(currentAddr, currentPort);
|
|
|
|
LogMessage("Linked at startup to reflector %u", currentId);
|
|
}
|
|
}
|
|
|
|
for (;;) {
|
|
unsigned char buffer[200U];
|
|
in_addr address;
|
|
unsigned int port;
|
|
|
|
// From the reflector to the MMDVM
|
|
unsigned int len = remoteNetwork.readData(buffer, 200U, address, port);
|
|
if (len > 0U) {
|
|
// If we're linked and it's from the right place, send it on
|
|
if (currentId != 9999U && currentAddr.s_addr == address.s_addr && currentPort == port) {
|
|
// Don't pass reflector control data through to the MMDVM
|
|
if (buffer[0U] != 0xF0U && buffer[0U] != 0xF1U) {
|
|
// Rewrite the LCF and the destination TG
|
|
if (buffer[0U] == 0x64U) {
|
|
buffer[1U] = 0x00U; // LCF is for TGs
|
|
} else if (buffer[0U] == 0x65U) {
|
|
buffer[1U] = (currentId >> 16) & 0xFFU;
|
|
buffer[2U] = (currentId >> 8) & 0xFFU;
|
|
buffer[3U] = (currentId >> 0) & 0xFFU;
|
|
}
|
|
|
|
localNetwork.writeData(buffer, len, rptAddr, rptPort);
|
|
}
|
|
|
|
// Any network activity is proof that the reflector is alive
|
|
lostTimer.start();
|
|
}
|
|
}
|
|
|
|
// From the MMDVM to the reflector or control data
|
|
len = localNetwork.readData(buffer, 200U, address, port);
|
|
if (len > 0U) {
|
|
if (buffer[0U] == 0x65U) {
|
|
dstId = (buffer[1U] << 16) & 0xFF0000U;
|
|
dstId |= (buffer[2U] << 8) & 0x00FF00U;
|
|
dstId |= (buffer[3U] << 0) & 0x0000FFU;
|
|
} else if (buffer[0U] == 0x66U) {
|
|
srcId = (buffer[1U] << 16) & 0xFF0000U;
|
|
srcId |= (buffer[2U] << 8) & 0x00FF00U;
|
|
srcId |= (buffer[3U] << 0) & 0x0000FFU;
|
|
|
|
if (dstId != currentId) {
|
|
CP25Reflector* reflector = NULL;
|
|
if (dstId != 9999U)
|
|
reflector = reflectors.find(dstId);
|
|
|
|
// If we're unlinking or changing reflectors, unlink from the current one
|
|
if (dstId == 9999U || reflector != NULL) {
|
|
std::string callsign = lookup->find(srcId);
|
|
|
|
if (currentId != 9999U) {
|
|
LogMessage("Unlinked from reflector %u by %s", currentId, callsign.c_str());
|
|
|
|
remoteNetwork.writeUnlink(currentAddr, currentPort);
|
|
remoteNetwork.writeUnlink(currentAddr, currentPort);
|
|
remoteNetwork.writeUnlink(currentAddr, currentPort);
|
|
|
|
inactivityTimer.stop();
|
|
pollTimer.stop();
|
|
lostTimer.stop();
|
|
}
|
|
|
|
if (speech != NULL)
|
|
speech->announce(dstId);
|
|
|
|
currentId = dstId;
|
|
}
|
|
|
|
// Link to the new reflector
|
|
if (reflector != NULL) {
|
|
currentId = dstId;
|
|
currentAddr = reflector->m_address;
|
|
currentPort = reflector->m_port;
|
|
|
|
std::string callsign = lookup->find(srcId);
|
|
LogMessage("Linked to reflector %u by %s", currentId, callsign.c_str());
|
|
|
|
remoteNetwork.writePoll(currentAddr, currentPort);
|
|
remoteNetwork.writePoll(currentAddr, currentPort);
|
|
remoteNetwork.writePoll(currentAddr, currentPort);
|
|
|
|
inactivityTimer.start();
|
|
pollTimer.start();
|
|
lostTimer.start();
|
|
}
|
|
}
|
|
} else if (buffer[0U] == 0x80U) {
|
|
if (speech != NULL)
|
|
speech->eof();
|
|
}
|
|
|
|
// If we're linked and we have a network, send it on
|
|
if (currentId != 9999U) {
|
|
// Rewrite the LCF and the destination TG
|
|
if (buffer[0U] == 0x64U) {
|
|
buffer[1U] = 0x00U; // LCF is for TGs
|
|
} else if (buffer[0U] == 0x65U) {
|
|
buffer[1U] = (currentId >> 16) & 0xFFU;
|
|
buffer[2U] = (currentId >> 8) & 0xFFU;
|
|
buffer[3U] = (currentId >> 0) & 0xFFU;
|
|
}
|
|
|
|
remoteNetwork.writeData(buffer, len, currentAddr, currentPort);
|
|
inactivityTimer.start();
|
|
}
|
|
}
|
|
|
|
unsigned int ms = stopWatch.elapsed();
|
|
stopWatch.start();
|
|
|
|
reflectors.clock(ms);
|
|
|
|
if (speech != NULL)
|
|
speech->clock(ms);
|
|
|
|
inactivityTimer.clock(ms);
|
|
if (inactivityTimer.isRunning() && inactivityTimer.hasExpired()) {
|
|
if (currentId != 9999U && startupId == 9999U) {
|
|
LogMessage("Unlinking from %u due to inactivity", currentId);
|
|
|
|
remoteNetwork.writeUnlink(currentAddr, currentPort);
|
|
remoteNetwork.writeUnlink(currentAddr, currentPort);
|
|
remoteNetwork.writeUnlink(currentAddr, currentPort);
|
|
|
|
if (speech != NULL)
|
|
speech->announce(currentId);
|
|
currentId = 9999U;
|
|
|
|
pollTimer.stop();
|
|
lostTimer.stop();
|
|
inactivityTimer.stop();
|
|
} else if (currentId != startupId) {
|
|
if (currentId != 9999U) {
|
|
remoteNetwork.writeUnlink(currentAddr, currentPort);
|
|
remoteNetwork.writeUnlink(currentAddr, currentPort);
|
|
remoteNetwork.writeUnlink(currentAddr, currentPort);
|
|
}
|
|
|
|
CP25Reflector* reflector = reflectors.find(startupId);
|
|
if (reflector != NULL) {
|
|
currentId = startupId;
|
|
currentAddr = reflector->m_address;
|
|
currentPort = reflector->m_port;
|
|
|
|
inactivityTimer.start();
|
|
pollTimer.start();
|
|
lostTimer.start();
|
|
|
|
LogMessage("Linked to reflector %u due to inactivity", currentId);
|
|
|
|
if (speech != NULL)
|
|
speech->announce(currentId);
|
|
|
|
remoteNetwork.writePoll(currentAddr, currentPort);
|
|
remoteNetwork.writePoll(currentAddr, currentPort);
|
|
remoteNetwork.writePoll(currentAddr, currentPort);
|
|
} else {
|
|
startupId = 9999U;
|
|
inactivityTimer.stop();
|
|
pollTimer.stop();
|
|
lostTimer.stop();
|
|
}
|
|
}
|
|
}
|
|
|
|
pollTimer.clock(ms);
|
|
if (pollTimer.isRunning() && pollTimer.hasExpired()) {
|
|
if (currentId != 9999U)
|
|
remoteNetwork.writePoll(currentAddr, currentPort);
|
|
pollTimer.start();
|
|
}
|
|
|
|
lostTimer.clock(ms);
|
|
if (lostTimer.isRunning() && lostTimer.hasExpired()) {
|
|
if (currentId != 9999U) {
|
|
LogWarning("No response from %u, unlinking", currentId);
|
|
currentId = 9999U;
|
|
}
|
|
|
|
inactivityTimer.stop();
|
|
lostTimer.stop();
|
|
}
|
|
|
|
if (ms < 5U)
|
|
CThread::sleep(5U);
|
|
}
|
|
|
|
delete speech;
|
|
|
|
localNetwork.close();
|
|
|
|
remoteNetwork.close();
|
|
|
|
lookup->stop();
|
|
|
|
::LogFinalise();
|
|
}
|