NXDNClients/NXDNGateway/NXDNGateway.cpp

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/*
* Copyright (C) 2016,2017,2018,2020 by Jonathan Naylor G4KLX
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*
* 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.
*/
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#include "KenwoodNetwork.h"
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#include "IcomNetwork.h"
#include "NXDNNetwork.h"
#include "NXDNGateway.h"
#include "RptNetwork.h"
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#include "NXDNLookup.h"
#include "Reflectors.h"
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#include "GPSHandler.h"
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#include "StopWatch.h"
#include "Version.h"
#include "Thread.h"
#include "Voice.h"
#include "Timer.h"
#include "Utils.h"
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#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 <netdb.h>
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#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 = "NXDNGateway.ini";
#else
const char* DEFAULT_INI_FILE = "/etc/NXDNGateway.ini";
#endif
#include <cstdio>
#include <cstdlib>
#include <cstdarg>
#include <ctime>
#include <cstring>
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const unsigned char NXDN_TYPE_DCALL_HDR = 0x09U;
const unsigned char NXDN_TYPE_DCALL = 0x0BU;
const unsigned char NXDN_TYPE_TX_REL = 0x08U;
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const unsigned short NXDN_VOICE_ID = 9999U;
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class CStaticTG {
public:
unsigned short m_tg;
sockaddr_storage m_addr;
unsigned int m_addrLen;
};
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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, "NXDNGateway version %s\n", VERSION);
return 0;
} else if (arg.substr(0, 1) == "-") {
::fprintf(stderr, "Usage: NXDNGateway [-v|--version] [filename]\n");
return 1;
} else {
iniFile = argv[currentArg];
}
}
}
CNXDNGateway* gateway = new CNXDNGateway(std::string(iniFile));
gateway->run();
delete gateway;
return 0;
}
CNXDNGateway::CNXDNGateway(const std::string& file) :
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m_conf(file),
m_writer(NULL),
m_gps(NULL)
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{
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CUDPSocket::startup();
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}
CNXDNGateway::~CNXDNGateway()
{
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CUDPSocket::shutdown();
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}
void CNXDNGateway::run()
{
bool ret = m_conf.read();
if (!ret) {
::fprintf(stderr, "NXDNGateway: 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) {
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::fprintf(stderr, "Couldn't fork() , exiting\n");
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return;
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}
else if (pid != 0) {
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exit(EXIT_SUCCESS);
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}
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// Create new session and process group
if (::setsid() == -1) {
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::fprintf(stderr, "Couldn't setsid(), exiting\n");
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return;
}
// Set the working directory to the root directory
if (::chdir("/") == -1) {
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::fprintf(stderr, "Couldn't cd /, exiting\n");
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return;
}
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// If we are currently root...
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if (getuid() == 0) {
struct passwd* user = ::getpwnam("mmdvm");
if (user == NULL) {
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::fprintf(stderr, "Could not get the mmdvm user, exiting\n");
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return;
}
uid_t mmdvm_uid = user->pw_uid;
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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::fprintf(stderr, "Could not set mmdvm GID, exiting\n");
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return;
}
if (setuid(mmdvm_uid) != 0) {
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::fprintf(stderr, "Could not set mmdvm UID, exiting\n");
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return;
}
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// Double check it worked (AKA Paranoia)
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if (setuid(0) != -1) {
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::fprintf(stderr, "It's possible to regain root - something is wrong!, exiting\n");
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return;
}
}
}
#endif
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#if !defined(_WIN32) && !defined(_WIN64)
ret = ::LogInitialise(m_daemon, m_conf.getLogFilePath(), m_conf.getLogFileRoot(), m_conf.getLogFileLevel(), m_conf.getLogDisplayLevel(), m_conf.getLogFileRotate());
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#else
ret = ::LogInitialise(false, m_conf.getLogFilePath(), m_conf.getLogFileRoot(), m_conf.getLogFileLevel(), m_conf.getLogDisplayLevel(), m_conf.getLogFileRotate());
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#endif
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if (!ret) {
::fprintf(stderr, "NXDNGateway: 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
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createGPS();
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IRptNetwork* localNetwork = NULL;
std::string protocol = m_conf.getRptProtocol();
if (protocol == "Kenwood")
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localNetwork = new CKenwoodNetwork(m_conf.getMyPort(), m_conf.getRptAddress(), m_conf.getRptPort(), m_conf.getDebug());
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else
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localNetwork = new CIcomNetwork(m_conf.getMyPort(), m_conf.getRptAddress(), m_conf.getRptPort(), m_conf.getDebug());
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ret = localNetwork->open();
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if (!ret) {
::LogFinalise();
return;
}
CNXDNNetwork remoteNetwork(m_conf.getNetworkPort(), m_conf.getCallsign(), m_conf.getNetworkDebug());
ret = remoteNetwork.open();
if (!ret) {
localNetwork->close();
delete localNetwork;
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::LogFinalise();
return;
}
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CUDPSocket* remoteSocket = NULL;
if (m_conf.getRemoteCommandsEnabled()) {
remoteSocket = new CUDPSocket(m_conf.getRemoteCommandsPort());
ret = remoteSocket->open();
if (!ret) {
delete remoteSocket;
remoteSocket = NULL;
}
}
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CReflectors reflectors(m_conf.getNetworkHosts1(), m_conf.getNetworkHosts2(), m_conf.getNetworkReloadTime());
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if (m_conf.getNetworkParrotPort() > 0U)
reflectors.setParrot(m_conf.getNetworkParrotAddress(), m_conf.getNetworkParrotPort());
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if (m_conf.getNetworkNXDN2DMRPort() > 0U)
reflectors.setNXDN2DMR(m_conf.getNetworkNXDN2DMRAddress(), m_conf.getNetworkNXDN2DMRPort());
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reflectors.load();
CNXDNLookup* lookup = new CNXDNLookup(m_conf.getLookupName(), m_conf.getLookupTime());
lookup->read();
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unsigned int rfHangTime = m_conf.getNetworkRFHangTime();
unsigned int netHangTime = m_conf.getNetworkNetHangTime();
CTimer hangTimer(1000U);
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CTimer pollTimer(1000U, 5U);
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pollTimer.start();
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CStopWatch stopWatch;
stopWatch.start();
CVoice* voice = NULL;
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if (m_conf.getVoiceEnabled()) {
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voice = new CVoice(m_conf.getVoiceDirectory(), m_conf.getVoiceLanguage(), NXDN_VOICE_ID);
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bool ok = voice->open();
if (!ok) {
delete voice;
voice = NULL;
}
}
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LogMessage("Starting NXDNGateway-%s", VERSION);
unsigned short srcId = 0U;
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unsigned short dstTG = 0U;
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bool grp = false;
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bool currentIsStatic = false;
unsigned short currentTG = 0U;
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unsigned int currentAddrLen = 0U;
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sockaddr_storage currentAddr;
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std::vector<unsigned short> staticIds = m_conf.getNetworkStatic();
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std::vector<CStaticTG> staticTGs;
for (std::vector<unsigned short>::const_iterator it = staticIds.cbegin(); it != staticIds.cend(); ++it) {
CNXDNReflector* reflector = reflectors.find(*it);
if (reflector != NULL) {
CStaticTG staticTG;
staticTG.m_tg = *it;
staticTG.m_addr = reflector->m_addr;
staticTG.m_addrLen = reflector->m_addrLen;
staticTGs.push_back(staticTG);
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remoteNetwork.writePoll(staticTG.m_addr, staticTG.m_addrLen, staticTG.m_tg);
remoteNetwork.writePoll(staticTG.m_addr, staticTG.m_addrLen, staticTG.m_tg);
remoteNetwork.writePoll(staticTG.m_addr, staticTG.m_addrLen, staticTG.m_tg);
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LogMessage("Statically linked to reflector %u", *it);
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}
}
for (;;) {
unsigned char buffer[200U];
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sockaddr_storage addr;
unsigned int addrLen;
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// From the reflector to the MMDVM
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unsigned int len = remoteNetwork.readData(buffer, 200U, addr, addrLen);
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if (len > 0U) {
// If we're linked and it's from the right place, send it on
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if (currentAddrLen > 0U && CUDPSocket::match(currentAddr, addr)) {
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// Don't pass reflector control data through to the MMDVM
if (::memcmp(buffer, "NXDND", 5U) == 0) {
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unsigned short dstTG = 0U;
dstTG |= (buffer[7U] << 8) & 0xFF00U;
dstTG |= (buffer[8U] << 0) & 0x00FFU;
bool grp = (buffer[9U] & 0x01U) == 0x01U;
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if (grp && currentTG == dstTG)
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localNetwork->write(buffer + 10U, len - 10U);
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hangTimer.start();
}
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} else if (currentTG == 0U) {
bool poll = false;
// We weren't really connected yet, but we got a reply from a poll, or some data
if ((::memcmp(buffer, "NXDND", 5U) == 0) || (poll = (::memcmp(buffer, "NXDNP", 5U) == 0))) {
// Find the static TG that this audio data/poll belongs to
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for (std::vector<CStaticTG>::const_iterator it = staticTGs.cbegin(); it != staticTGs.cend(); ++it) {
if (CUDPSocket::match(addr, (*it).m_addr)) {
currentTG = (*it).m_tg;
break;
}
}
if (currentTG > 0U) {
currentAddr = addr;
currentAddrLen = addrLen;
currentIsStatic = true;
unsigned short dstTG = 0U;
dstTG |= (buffer[7U] << 8) & 0xFF00U;
dstTG |= (buffer[8U] << 0) & 0x00FFU;
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bool grp = (buffer[9U] & 0x01U) == 0x01U;
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if (grp && currentTG == dstTG && !poll)
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localNetwork->write(buffer + 10U, len - 10U);
LogMessage("Switched to reflector %u due to network activity", currentTG);
hangTimer.setTimeout(netHangTime);
hangTimer.start();
}
}
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}
}
// From the MMDVM to the reflector or control data
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len = localNetwork->read(buffer);
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if (len > 0U) {
// Only process the beginning and ending voice blocks here
if ((buffer[0U] == 0x81U || buffer[0U] == 0x83U) && (buffer[5U] == 0x01U || buffer[5U] == 0x08U)) {
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grp = (buffer[7U] & 0x20U) == 0x20U;
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srcId = (buffer[8U] << 8) & 0xFF00U;
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srcId |= (buffer[9U] << 0) & 0x00FFU;
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dstTG = (buffer[10U] << 8) & 0xFF00U;
dstTG |= (buffer[11U] << 0) & 0x00FFU;
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if (dstTG != currentTG) {
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if (currentAddrLen > 0U) {
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std::string callsign = lookup->find(srcId);
LogMessage("Unlinking from reflector %u by %s", currentTG, callsign.c_str());
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if (!currentIsStatic) {
remoteNetwork.writeUnlink(currentAddr, currentAddrLen, currentTG);
remoteNetwork.writeUnlink(currentAddr, currentAddrLen, currentTG);
remoteNetwork.writeUnlink(currentAddr, currentAddrLen, currentTG);
}
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hangTimer.stop();
}
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const CStaticTG* found = NULL;
for (std::vector<CStaticTG>::const_iterator it = staticTGs.cbegin(); it != staticTGs.cend(); ++it) {
if (dstTG == (*it).m_tg) {
found = &(*it);
break;
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}
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}
if (found == NULL) {
CNXDNReflector* refl = reflectors.find(dstTG);
if (refl != NULL) {
currentTG = dstTG;
currentAddr = refl->m_addr;
currentAddrLen = refl->m_addrLen;
currentIsStatic = false;
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} else {
currentTG = dstTG;
currentAddrLen = 0U;
currentIsStatic = false;
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}
} else {
currentTG = found->m_tg;
currentAddr = found->m_addr;
currentAddrLen = found->m_addrLen;
currentIsStatic = true;
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}
// Link to the new reflector
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if (currentAddrLen > 0U) {
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std::string callsign = lookup->find(srcId);
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LogMessage("Switched to reflector %u due to RF activity from %s", currentTG, callsign.c_str());
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if (!currentIsStatic) {
remoteNetwork.writePoll(currentAddr, currentAddrLen, currentTG);
remoteNetwork.writePoll(currentAddr, currentAddrLen, currentTG);
remoteNetwork.writePoll(currentAddr, currentAddrLen, currentTG);
}
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hangTimer.setTimeout(rfHangTime);
hangTimer.start();
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} else {
hangTimer.stop();
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}
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if (voice != NULL) {
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if (currentAddrLen == 0U)
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voice->unlinked();
else
voice->linkedTo(currentTG);
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}
}
// If it's the end of the voice transmission, start the voice prompt
if ((buffer[0U] == 0x81U || buffer[0U] == 0x83U) && buffer[5U] == 0x08U) {
if (voice != NULL)
voice->eof();
}
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}
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if (m_gps != NULL) {
if ((buffer[0U] & 0xF0U) == 0x90U) {
switch (buffer[2U] & 0x3FU) {
case NXDN_TYPE_DCALL_HDR: {
unsigned short srcId = 0U;
srcId |= (buffer[5U] << 8) & 0xFF00U;
srcId |= (buffer[6U] << 0) & 0x00FFU;
std::string callsign = lookup->find(srcId);
m_gps->processHeader(callsign);
}
break;
case NXDN_TYPE_DCALL:
m_gps->processData(buffer + 3U);
break;
case NXDN_TYPE_TX_REL:
m_gps->processEnd();
break;
default:
break;
}
}
}
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// If we're linked and we have a network, send it on
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if (currentAddrLen > 0U) {
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remoteNetwork.writeData(buffer, len, srcId, dstTG, grp, currentAddr, currentAddrLen);
hangTimer.start();
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}
}
if (voice != NULL) {
unsigned int length = voice->read(buffer);
if (length > 0U)
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localNetwork->write(buffer, length);
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}
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if (remoteSocket != NULL) {
sockaddr_storage addr;
unsigned int addrLen;
int res = remoteSocket->read(buffer, 200U, addr, addrLen);
if (res > 0) {
buffer[res] = '\0';
if (::memcmp(buffer + 0U, "TalkGroup", 9U) == 0) {
unsigned int tg = ((strlen((char*)buffer + 0U) > 10) ? (unsigned int)::atoi((char*)(buffer + 10U)) : 9999);
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if (tg != currentTG) {
if (currentAddrLen > 0U) {
LogMessage("Unlinked from reflector %u by remote command", currentTG);
if (!currentIsStatic) {
remoteNetwork.writeUnlink(currentAddr, currentAddrLen, currentTG);
remoteNetwork.writeUnlink(currentAddr, currentAddrLen, currentTG);
remoteNetwork.writeUnlink(currentAddr, currentAddrLen, currentTG);
}
hangTimer.stop();
}
const CStaticTG* found = NULL;
for (std::vector<CStaticTG>::const_iterator it = staticTGs.cbegin(); it != staticTGs.cend(); ++it) {
if (tg == (*it).m_tg) {
found = &(*it);
break;
}
}
if (found == NULL) {
CNXDNReflector* refl = reflectors.find(tg);
if (refl != NULL) {
currentTG = tg;
currentAddr = refl->m_addr;
currentAddrLen = refl->m_addrLen;
currentIsStatic = false;
} else {
currentTG = tg;
currentAddrLen = 0U;
currentIsStatic = false;
}
} else {
currentTG = found->m_tg;
currentAddr = found->m_addr;
currentAddrLen = found->m_addrLen;
currentIsStatic = true;
}
// Link to the new reflector
if (currentAddrLen > 0U) {
LogMessage("Switched to reflector %u by remote command", currentTG);
if (!currentIsStatic) {
remoteNetwork.writePoll(currentAddr, currentAddrLen, currentTG);
remoteNetwork.writePoll(currentAddr, currentAddrLen, currentTG);
remoteNetwork.writePoll(currentAddr, currentAddrLen, currentTG);
}
hangTimer.setTimeout(rfHangTime);
hangTimer.start();
} else {
hangTimer.stop();
}
if (voice != NULL) {
if (currentAddrLen == 0U)
voice->unlinked();
else
voice->linkedTo(currentTG);
}
}
} else if (::memcmp(buffer + 0U, "status", 6U) == 0) {
std::string state = std::string("nxdn:") + ((currentAddrLen > 0) ? "conn" : "disc");
remoteSocket->write((unsigned char*)state.c_str(), (unsigned int)state.length(), addr, addrLen);
} else if (::memcmp(buffer + 0U, "host", 4U) == 0) {
std::string ref;
if (currentAddrLen > 0) {
char buffer[INET6_ADDRSTRLEN];
if (getnameinfo((struct sockaddr*)&currentAddr, currentAddrLen, buffer, sizeof(buffer), 0, 0, NI_NUMERICHOST | NI_NUMERICSERV) == 0) {
ref = std::string(buffer);
}
}
std::string host = std::string("nxdn:\"") + ((ref.length() == 0) ? "NONE" : ref) + "\"";
remoteSocket->write((unsigned char*)host.c_str(), (unsigned int)host.length(), addr, addrLen);
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} else {
CUtils::dump("Invalid remote command received", buffer, res);
}
}
}
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unsigned int ms = stopWatch.elapsed();
stopWatch.start();
reflectors.clock(ms);
localNetwork->clock(ms);
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if (voice != NULL)
voice->clock(ms);
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hangTimer.clock(ms);
if (hangTimer.isRunning() && hangTimer.hasExpired()) {
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if (currentAddrLen > 0U) {
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LogMessage("Unlinking from %u due to inactivity", currentTG);
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if (!currentIsStatic) {
remoteNetwork.writeUnlink(currentAddr, currentAddrLen, currentTG);
remoteNetwork.writeUnlink(currentAddr, currentAddrLen, currentTG);
remoteNetwork.writeUnlink(currentAddr, currentAddrLen, currentTG);
}
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if (voice != NULL)
voice->unlinked();
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currentAddrLen = 0U;
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hangTimer.stop();
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}
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currentTG = 0U;
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}
pollTimer.clock(ms);
if (pollTimer.isRunning() && pollTimer.hasExpired()) {
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// Poll the static TGs
for (std::vector<CStaticTG>::const_iterator it = staticTGs.cbegin(); it != staticTGs.cend(); ++it)
remoteNetwork.writePoll((*it).m_addr, (*it).m_addrLen, (*it).m_tg);
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// Poll the dynamic TG
if (!currentIsStatic && currentAddrLen > 0U)
remoteNetwork.writePoll(currentAddr, currentAddrLen, currentTG);
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pollTimer.start();
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}
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if (m_writer != NULL)
m_writer->clock(ms);
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if (ms < 5U)
CThread::sleep(5U);
}
delete voice;
localNetwork->close();
delete localNetwork;
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if (remoteSocket != NULL) {
remoteSocket->close();
delete remoteSocket;
}
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remoteNetwork.close();
lookup->stop();
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if (m_gps != NULL) {
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m_writer->close();
delete m_writer;
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delete m_gps;
}
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::LogFinalise();
}
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void CNXDNGateway::createGPS()
{
if (!m_conf.getAPRSEnabled())
return;
std::string callsign = m_conf.getCallsign();
std::string rptSuffix = m_conf.getSuffix();
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std::string address = m_conf.getAPRSAddress();
unsigned short port = m_conf.getAPRSPort();
std::string suffix = m_conf.getAPRSSuffix();
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bool debug = m_conf.getDebug();
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m_writer = new CAPRSWriter(callsign, rptSuffix, address, port, debug);
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unsigned int txFrequency = m_conf.getTxFrequency();
unsigned int rxFrequency = m_conf.getRxFrequency();
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std::string desc = m_conf.getAPRSDescription();
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m_writer->setInfo(txFrequency, rxFrequency, desc);
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bool enabled = m_conf.getGPSDEnabled();
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if (enabled) {
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std::string address = m_conf.getGPSDAddress();
std::string port = m_conf.getGPSDPort();
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m_writer->setGPSDLocation(address, port);
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} else {
float latitude = m_conf.getLatitude();
float longitude = m_conf.getLongitude();
int height = m_conf.getHeight();
m_writer->setStaticLocation(latitude, longitude, height);
}
bool ret = m_writer->open();
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if (!ret) {
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delete m_writer;
m_writer = NULL;
return;
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}
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m_gps = new CGPSHandler(callsign, suffix, m_writer);
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}
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