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MMDVM_CM/USRP2P25/USRP2P25.cpp
Doug McLain 71e8c23224 Add USRP2P25
2021-04-07 16:03:14 -04:00

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/*
* Copyright (C) 2021 by Doug McLain AD8DP
*
* 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 "USRP2P25.h"
#include <sys/time.h>
#include <unistd.h>
#include <signal.h>
#include <fcntl.h>
#include <pwd.h>
const unsigned char REC62[] = {
0x62U, 0x02U, 0x02U, 0x0CU, 0x0BU, 0x12U, 0x64U, 0x00U, 0x00U, 0x80U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U,
0x00U, 0x00U, 0x00U, 0x00U, 0x00U};
const unsigned char REC63[] = {
0x63U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x02U};
const unsigned char REC64[] = {
0x64U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x02U};
const unsigned char REC65[] = {
0x65U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x02U};
const unsigned char REC66[] = {
0x66U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x02U};
const unsigned char REC67[] = {
0x67U, 0xF0U, 0x9DU, 0x6AU, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x02U};
const unsigned char REC68[] = {
0x68U, 0x19U, 0xD4U, 0x26U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x02U};
const unsigned char REC69[] = {
0x69U, 0xE0U, 0xEBU, 0x7BU, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x02U};
const unsigned char REC6A[] = {
0x6AU, 0x00U, 0x00U, 0x02U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U};
const unsigned char REC6B[] = {
0x6BU, 0x02U, 0x02U, 0x0CU, 0x0BU, 0x12U, 0x64U, 0x00U, 0x00U, 0x80U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U,
0x00U, 0x00U, 0x00U, 0x00U, 0x00U};
const unsigned char REC6C[] = {
0x6CU, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x02U};
const unsigned char REC6D[] = {
0x6DU, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x02U};
const unsigned char REC6E[] = {
0x6EU, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x02U};
const unsigned char REC6F[] = {
0x6FU, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x02U};
const unsigned char REC70[] = {
0x70U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x02U};
const unsigned char REC71[] = {
0x71U, 0xACU, 0xB8U, 0xA4U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x02U};
const unsigned char REC72[] = {
0x72U, 0x9BU, 0xDCU, 0x75U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x02U};
const unsigned char REC73[] = {
0x73U, 0x00U, 0x00U, 0x02U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U};
const unsigned char REC80[] = {
0x80U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U};
#define USRP_FRAME_PER 15U
#define P25_FRAME_PER 15U
const char* DEFAULT_INI_FILE = "/etc/USRP2P25.ini";
const char* HEADER1 = "This software is for use on amateur radio networks only,";
const char* HEADER2 = "it is to be used for educational purposes only. Its use on";
const char* HEADER3 = "commercial networks is strictly prohibited.";
const char* HEADER4 = "Copyright(C) 2021 by AD8DP";
#include <functional>
#include <algorithm>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <clocale>
#include <cctype>
static bool m_killed = false;
void sig_handler(int signo)
{
if (signo == SIGTERM) {
m_killed = true;
::fprintf(stdout, "Received SIGTERM\n");
}
}
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, "USRP2P25 version %s\n", VERSION);
return 0;
} else if (arg.substr(0, 1) == "-") {
::fprintf(stderr, "Usage: USRP2P25 [-v|--version] [filename]\n");
return 1;
} else {
iniFile = argv[currentArg];
}
}
}
// Capture SIGTERM to finish gracelessly
if (signal(SIGTERM, sig_handler) == SIG_ERR)
::fprintf(stdout, "Can't catch SIGTERM\n");
CUSRP2P25* gateway = new CUSRP2P25(std::string(iniFile));
int ret = gateway->run();
delete gateway;
return ret;
}
CUSRP2P25::CUSRP2P25(const std::string& configFile) :
m_callsign(),
m_conf(configFile),
m_usrpNetwork(NULL),
m_p25Network(NULL),
m_conv(),
m_p25Src(1U),
m_p25Dst(1U),
m_p25Frame(NULL),
m_p25Frames(0U),
m_p25info(false),
m_usrpFrame(NULL),
m_usrpFrames(0U)
{
m_p25Frame = new uint8_t[100U];
m_usrpFrame = new uint8_t[400U];
::memset(m_p25Frame, 0U, 100U);
::memset(m_usrpFrame, 0U, 400U);
}
CUSRP2P25::~CUSRP2P25()
{
delete[] m_p25Frame;
delete[] m_usrpFrame;
}
int CUSRP2P25::run()
{
bool ret = m_conf.read();
if (!ret) {
::fprintf(stderr, "USRP2P25: cannot read the .ini file\n");
return 1;
}
//setlocale(LC_ALL, "C");
uint32_t logDisplayLevel = m_conf.getLogDisplayLevel();
if(m_conf.getDaemon())
logDisplayLevel = 0U;
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 -1;
} else if (pid != 0)
exit(EXIT_SUCCESS);
// Create new session and process group
if (::setsid() == -1) {
::fprintf(stderr, "Couldn't setsid(), exiting\n");
return -1;
}
// Set the working directory to the root directory
if (::chdir("/") == -1) {
::fprintf(stderr, "Couldn't cd /, exiting\n");
return -1;
}
// 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 -1;
}
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 -1;
}
if (setuid(mmdvm_uid) != 0) {
::fprintf(stderr, "Could not set mmdvm UID, exiting\n");
return -1;
}
// Double check it worked (AKA Paranoia)
if (setuid(0) != -1) {
::fprintf(stderr, "It's possible to regain root - something is wrong!, exiting\n");
return -1;
}
}
}
ret = ::LogInitialise(m_conf.getLogFilePath(), m_conf.getLogFileRoot(), m_conf.getLogFileLevel(), logDisplayLevel);
if (!ret) {
::fprintf(stderr, "USRP2P25: unable to open the log file\n");
return 1;
}
if (m_daemon) {
::close(STDIN_FILENO);
::close(STDOUT_FILENO);
::close(STDERR_FILENO);
}
LogInfo(HEADER1);
LogInfo(HEADER2);
LogInfo(HEADER3);
LogInfo(HEADER4);
m_callsign = m_conf.getCallsign();
std::string p25_dstAddress = m_conf.getP25DstAddress();
unsigned int p25_dstPort = m_conf.getP25DstPort();
std::string p25_localAddress = m_conf.getP25LocalAddress();
unsigned int p25_localPort = m_conf.getP25LocalPort();
bool p25_debug = m_conf.getP25NetworkDebug();
::fprintf(stderr, "%s : %s\n", p25_dstAddress.c_str(), p25_localAddress.c_str());
m_p25Network = new CP25Network(p25_localAddress, p25_localPort, p25_dstAddress, p25_dstPort, m_callsign, p25_debug);
ret = m_p25Network->open();
if (!ret) {
::LogError("Cannot open the P25 network port");
::LogFinalise();
return 1;
}
m_p25Network->writePoll();
std::string usrp_address = m_conf.getUSRPAddress();
uint16_t usrp_dstPort = m_conf.getUSRPDstPort();
uint16_t usrp_localPort = m_conf.getUSRPLocalPort();
bool usrp_debug = m_conf.getUSRPDebug();
m_conv.setUSRPGainAdjDb(m_conf.getUSRPGainAdjDb());
m_usrpNetwork = new CUSRPNetwork(usrp_address, usrp_dstPort, usrp_localPort, usrp_debug);
ret = m_usrpNetwork->open();
if (!ret) {
::LogError("Cannot open the USRP network port");
::LogFinalise();
return 1;
}
CTimer networkWatchdog(100U, 0U, 1500U);
CTimer pollTimer(1000U, 8U);
CStopWatch stopWatch;
CStopWatch p25Watch;
CStopWatch usrpWatch;
pollTimer.start();
stopWatch.start();
p25Watch.start();
usrpWatch.start();
uint16_t p25_cnt = 0;
uint32_t usrp_cnt = 0;
LogMessage("Starting USRP2P25-%s", VERSION);
for (; m_killed == 0;) {
uint8_t buffer[2000U];
memset(buffer, 0, sizeof(buffer));
uint32_t ms = stopWatch.elapsed();
if (p25Watch.elapsed() > P25_FRAME_PER) {
unsigned int p25FrameType = m_conv.getP25(m_p25Frame);
if(p25FrameType == TAG_HEADER) {
p25_cnt = 0U;
p25Watch.start();
}
else if(p25FrameType == TAG_EOT) {
m_p25Network->writeData(REC80, 17U);
p25Watch.start();
}
else if(p25FrameType == TAG_DATA) {
unsigned int p25step = p25_cnt % 18U;
//CUtils::dump(1U, "P25 Data", m_p25Frame, 11U);
if (p25_cnt > 2U) {
switch (p25step) {
case 0x00U:
::memcpy(buffer, REC62, 22U);
::memcpy(buffer + 10U, m_p25Frame, 11U);
m_p25Network->writeData(buffer, 22U);
break;
case 0x01U:
::memcpy(buffer, REC63, 14U);
::memcpy(buffer + 1U, m_p25Frame, 11U);
m_p25Network->writeData(buffer, 14U);
break;
case 0x02U:
::memcpy(buffer, REC64, 17U);
::memcpy(buffer + 5U, m_p25Frame, 11U);
buffer[1U] = 0x00U;
m_p25Network->writeData(buffer, 17U);
break;
case 0x03U:
::memcpy(buffer, REC65, 17U);
::memcpy(buffer + 5U, m_p25Frame, 11U);
buffer[1U] = (m_p25Dst >> 16) & 0xFFU;
buffer[2U] = (m_p25Dst >> 8) & 0xFFU;
buffer[3U] = (m_p25Dst >> 0) & 0xFFU;
m_p25Network->writeData(buffer, 17U);
break;
case 0x04U:
::memcpy(buffer, REC66, 17U);
::memcpy(buffer + 5U, m_p25Frame, 11U);
buffer[1U] = (m_p25Src >> 16) & 0xFFU;
buffer[2U] = (m_p25Src >> 8) & 0xFFU;
buffer[3U] = (m_p25Src >> 0) & 0xFFU;
m_p25Network->writeData(buffer, 17U);
break;
case 0x05U:
::memcpy(buffer, REC67, 17U);
::memcpy(buffer + 5U, m_p25Frame, 11U);
m_p25Network->writeData(buffer, 17U);
break;
case 0x06U:
::memcpy(buffer, REC68, 17U);
::memcpy(buffer + 5U, m_p25Frame, 11U);
m_p25Network->writeData(buffer, 17U);
break;
case 0x07U:
::memcpy(buffer, REC69, 17U);
::memcpy(buffer + 5U, m_p25Frame, 11U);
m_p25Network->writeData(buffer, 17U);
break;
case 0x08U:
::memcpy(buffer, REC6A, 16U);
::memcpy(buffer + 4U, m_p25Frame, 11U);
m_p25Network->writeData(buffer, 16U);
break;
case 0x09U:
::memcpy(buffer, REC6B, 22U);
::memcpy(buffer + 10U, m_p25Frame, 11U);
m_p25Network->writeData(buffer, 22U);
break;
case 0x0AU:
::memcpy(buffer, REC6C, 14U);
::memcpy(buffer + 1U, m_p25Frame, 11U);
m_p25Network->writeData(buffer, 14U);
break;
case 0x0BU:
::memcpy(buffer, REC6D, 17U);
::memcpy(buffer + 5U, m_p25Frame, 11U);
m_p25Network->writeData(buffer, 17U);
break;
case 0x0CU:
::memcpy(buffer, REC6E, 17U);
::memcpy(buffer + 5U, m_p25Frame, 11U);
m_p25Network->writeData(buffer, 17U);
break;
case 0x0DU:
::memcpy(buffer, REC6F, 17U);
::memcpy(buffer + 5U, m_p25Frame, 11U);
m_p25Network->writeData(buffer, 17U);
break;
case 0x0EU:
::memcpy(buffer, REC70, 17U);
::memcpy(buffer + 5U, m_p25Frame, 11U);
buffer[1U] = 0x80U;
m_p25Network->writeData(buffer, 17U);
break;
case 0x0FU:
::memcpy(buffer, REC71, 17U);
::memcpy(buffer + 5U, m_p25Frame, 11U);
m_p25Network->writeData(buffer, 17U);
break;
case 0x10U:
::memcpy(buffer, REC72, 17U);
::memcpy(buffer + 5U, m_p25Frame, 11U);
m_p25Network->writeData(buffer, 17U);
break;
case 0x11U:
::memcpy(buffer, REC73, 16U);
::memcpy(buffer + 4U, m_p25Frame, 11U);
m_p25Network->writeData(buffer, 16U);
break;
}
}
p25_cnt++;
p25Watch.start();
}
}
while (m_p25Network->readData(m_p25Frame, 22U) > 0U) {
//CUtils::dump(1U, "P25 Data", m_p25Frame, 22U);
if (m_p25Frame[0U] != 0xF0U && m_p25Frame[0U] != 0xF1U) {
if (m_p25Frame[0U] == 0x62U && !m_p25info) {
m_p25Frames = 0;
//m_conv.putP25Header();
} else if (m_p25Frame[0U] == 0x65U && !m_p25info) {
m_p25Dst = (m_p25Frame[1U] << 16) & 0xFF0000U;
m_p25Dst |= (m_p25Frame[2U] << 8) & 0x00FF00U;
m_p25Dst |= (m_p25Frame[3U] << 0) & 0x0000FFU;
} else if (m_p25Frame[0U] == 0x66U && !m_p25info) {
m_p25Src = (m_p25Frame[1U] << 16) & 0xFF0000U;
m_p25Src |= (m_p25Frame[2U] << 8) & 0x00FF00U;
m_p25Src |= (m_p25Frame[3U] << 0) & 0x0000FFU;
LogMessage("Received P25 audio: Src: %d Dst: %d", m_p25Src, m_p25Dst);
m_p25info = true;
} else if (m_p25Frame[0U] == 0x80U) {
LogMessage("P25 received end of voice transmission, %.1f seconds", float(m_p25Frames) / 50.0F);
m_p25info = false;
//m_conv.putP25EOT();
}
m_conv.putP25(m_p25Frame);
m_p25Frames++;
}
}
if (usrpWatch.elapsed() > USRP_FRAME_PER) {
int16_t pcm[160];
if(m_conv.getUSRP(pcm)){
//CUtils::dump(1U, "USRP data:", m_usrpFrame, 33U);
const uint32_t cnt = htonl(usrp_cnt);
memcpy(m_usrpFrame, "USRP", 4);
memset(m_usrpFrame+4, 0, 28);
memcpy(m_usrpFrame+4, &cnt, 4);
m_usrpFrame[15] = 1;
for(int i = 0; i < 320; i+=2){
m_usrpFrame[32+i] = pcm[(i/2)] & 0xff;
m_usrpFrame[32+i+1] = pcm[(i/2)] >> 8;
}
m_usrpNetwork->writeData(m_usrpFrame, 352);
usrp_cnt++;
usrpWatch.start();
}
}
uint32_t len = 0;
while ( (len = m_usrpNetwork->readData(m_usrpFrame, 400)) ) {
if((len == 32) && !memcmp(m_usrpFrame, "USRP", 4)) {
LogMessage("USRP received end of voice transmission, %.1f seconds", float(m_usrpFrames) / 50.0F);
m_conv.putUSRPEOT();
m_usrpFrames = 0U;
}
if( (!memcmp(m_usrpFrame, "USRP", 4)) && len == 352) {
if(!m_usrpFrames){
m_conv.putUSRPHeader();
LogMessage("USRP first frame received");
}
int16_t pcm[160];
for(int i = 0; i < 160; ++i){
pcm[i] = (m_usrpFrame[32+(i*2)+1] << 8) | m_usrpFrame[32+(i*2)];
}
m_conv.putUSRP(pcm);
m_usrpFrames++;
}
}
stopWatch.start();
pollTimer.clock(ms);
if (pollTimer.isRunning() && pollTimer.hasExpired()) {
m_p25Network->writePoll();
pollTimer.start();
}
if (ms < 5U) ::usleep(5U * 1000U);
}
m_p25Network->close();
m_usrpNetwork->close();
delete m_usrpNetwork;
delete m_p25Network;
::LogFinalise();
return 0;
}
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