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QnetGateway/QnetDVAP.cpp

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/*
* Copyright (C) 2010, 2011 by Scott Lawson KI4LKF
*
* Copyright (C) 2015 by Thomas A. Early N7TAE
*
* 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.
*/
/***
KI4LKF, N7TAE
***/
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <unistd.h>
#include <fcntl.h>
#include <arpa/inet.h>
#include <signal.h>
#include <stdlib.h>
#include <stdarg.h>
#include <sys/ioctl.h>
#include <termios.h>
#include <sys/file.h>
#include <atomic>
#include <future>
#include <exception>
#include <thread>
#include <string>
#include "DVAPDongle.h"
#include "QnetTypeDefs.h"
#include "Random.h"
#include "UnixDgramSocket.h"
#include "QnetConfigure.h"
#include "Timer.h"
#define DVAP_VERSION "QnetDVAP-6.1.1"
#define CALL_SIZE 8
#define IP_SIZE 15
typedef struct dvap_ack_arg_tag {
char mycall[8];
float ber;
} SDVAP_ACK_ARG;
// assigned module, must be A, B or C
static int assigned_module;
// unix sockets
static std::string modem2gate, gate2modem;
static CUnixDgramReader Gate2Modem;
static CUnixDgramWriter Modem2Gate;
/* Default configuration data */
static std::string RPTR;
static std::string OWNER;
static char RPTR_MOD;
static std::string MODULE_SERIAL_NUMBER; /* APxxxxxx */
static int MODULE_FREQUENCY; /* between 144000000 and 148000000 */
static int MODULE_POWER; /* between -12 and 10 */
static int MODULE_SQUELCH; /* between -128 and -45 */
static int MODULE_OFFSET; /* between -2000 and 2000 */
static int MODULE_PACKET_WAIT; /* wait 25 ms in reading from local G2 */
static int TIMING_TIMEOUT_REMOTE_G2; /* 1 second */
static int TIMING_PLAY_DELAY;
static int TIMING_PLAY_WAIT;
static bool MODULE_ACKNOWLEDGE;
static double TIMING_TIMEOUT_LOCAL_RPTR;
static bool LOG_DEBUG;
static bool LOG_QSO;
static int inactiveMax = 25;
/* helper data */
static unsigned char SND_TERM_ID;
static char RPTR_and_G[9];
static char RPTR_and_MOD[9];
static int serfd = -1;
static bool busy20000 = false;
std::atomic<bool> keep_running(true);
static unsigned int space = 0;
/* helper routines */
static bool ReadConfig(const char *cfgFile);
static void sig_catch(int signum);
static int open_sock();
static void ReadFromGateway();
static void calcPFCS(unsigned char *packet, unsigned char *pfcs);
static void ReadDVAPThread();
static void RptrAckThread(SDVAP_ACK_ARG *parg);
/*** BER stuff ***/
extern void dstar_dv_init();
extern int dstar_dv_decode(const unsigned char *d, int data[3]);
CDVAPDongle dongle;
CRandom Random;
static void calcPFCS(unsigned char *packet, unsigned char *pfcs)
{
unsigned short crc_dstar_ffff = 0xffff;
unsigned short tmp, short_c;
unsigned short crc_tabccitt[256] = {
0x0000,0x1189,0x2312,0x329b,0x4624,0x57ad,0x6536,0x74bf,0x8c48,0x9dc1,0xaf5a,0xbed3,0xca6c,0xdbe5,0xe97e,0xf8f7,
0x1081,0x0108,0x3393,0x221a,0x56a5,0x472c,0x75b7,0x643e,0x9cc9,0x8d40,0xbfdb,0xae52,0xdaed,0xcb64,0xf9ff,0xe876,
0x2102,0x308b,0x0210,0x1399,0x6726,0x76af,0x4434,0x55bd,0xad4a,0xbcc3,0x8e58,0x9fd1,0xeb6e,0xfae7,0xc87c,0xd9f5,
0x3183,0x200a,0x1291,0x0318,0x77a7,0x662e,0x54b5,0x453c,0xbdcb,0xac42,0x9ed9,0x8f50,0xfbef,0xea66,0xd8fd,0xc974,
0x4204,0x538d,0x6116,0x709f,0x0420,0x15a9,0x2732,0x36bb,0xce4c,0xdfc5,0xed5e,0xfcd7,0x8868,0x99e1,0xab7a,0xbaf3,
0x5285,0x430c,0x7197,0x601e,0x14a1,0x0528,0x37b3,0x263a,0xdecd,0xcf44,0xfddf,0xec56,0x98e9,0x8960,0xbbfb,0xaa72,
0x6306,0x728f,0x4014,0x519d,0x2522,0x34ab,0x0630,0x17b9,0xef4e,0xfec7,0xcc5c,0xddd5,0xa96a,0xb8e3,0x8a78,0x9bf1,
0x7387,0x620e,0x5095,0x411c,0x35a3,0x242a,0x16b1,0x0738,0xffcf,0xee46,0xdcdd,0xcd54,0xb9eb,0xa862,0x9af9,0x8b70,
0x8408,0x9581,0xa71a,0xb693,0xc22c,0xd3a5,0xe13e,0xf0b7,0x0840,0x19c9,0x2b52,0x3adb,0x4e64,0x5fed,0x6d76,0x7cff,
0x9489,0x8500,0xb79b,0xa612,0xd2ad,0xc324,0xf1bf,0xe036,0x18c1,0x0948,0x3bd3,0x2a5a,0x5ee5,0x4f6c,0x7df7,0x6c7e,
0xa50a,0xb483,0x8618,0x9791,0xe32e,0xf2a7,0xc03c,0xd1b5,0x2942,0x38cb,0x0a50,0x1bd9,0x6f66,0x7eef,0x4c74,0x5dfd,
0xb58b,0xa402,0x9699,0x8710,0xf3af,0xe226,0xd0bd,0xc134,0x39c3,0x284a,0x1ad1,0x0b58,0x7fe7,0x6e6e,0x5cf5,0x4d7c,
0xc60c,0xd785,0xe51e,0xf497,0x8028,0x91a1,0xa33a,0xb2b3,0x4a44,0x5bcd,0x6956,0x78df,0x0c60,0x1de9,0x2f72,0x3efb,
0xd68d,0xc704,0xf59f,0xe416,0x90a9,0x8120,0xb3bb,0xa232,0x5ac5,0x4b4c,0x79d7,0x685e,0x1ce1,0x0d68,0x3ff3,0x2e7a,
0xe70e,0xf687,0xc41c,0xd595,0xa12a,0xb0a3,0x8238,0x93b1,0x6b46,0x7acf,0x4854,0x59dd,0x2d62,0x3ceb,0x0e70,0x1ff9,
0xf78f,0xe606,0xd49d,0xc514,0xb1ab,0xa022,0x92b9,0x8330,0x7bc7,0x6a4e,0x58d5,0x495c,0x3de3,0x2c6a,0x1ef1,0x0f78
};
for (int i = 0; i < 39 ; i++) {
short_c = 0x00ff & (unsigned short)packet[i];
tmp = (crc_dstar_ffff & 0x00ff) ^ short_c;
crc_dstar_ffff = (crc_dstar_ffff >> 8) ^ crc_tabccitt[tmp];
}
crc_dstar_ffff = ~crc_dstar_ffff;
tmp = crc_dstar_ffff;
pfcs[0] = (unsigned char)(crc_dstar_ffff & 0xff);
pfcs[1] = (unsigned char)((tmp >> 8) & 0xff);
return;
}
static void sig_catch(int signum)
{
if ((signum == SIGTERM) || (signum == SIGINT) || (signum == SIGHUP))
keep_running = false;
exit(0);
}
/* process configuration file */
static bool ReadConfig(const char *cfgFile)
{
CQnetConfigure cfg;
printf("Reading file %s\n", cfgFile);
if (cfg.Initialize(cfgFile))
return true;
const std::string estr; // an empty string
std::string type;
std::string dvap_path("module_");
if (0 > assigned_module) {
// we need to find the lone dvap module
for (int i=0; i<3; i++) {
std::string test(dvap_path);
test.append(1, 'a'+i);
if (cfg.KeyExists(test)) {
cfg.GetValue(test, estr, type, 1, 16);
if (type.compare("dvap"))
continue; // this ain't it!
dvap_path.assign(test);
assigned_module = i;
break;
}
}
if (0 > assigned_module) {
fprintf(stderr, "Error: no 'dvap' module found\n!");
return true;
}
} else {
// make sure dvap module is defined
dvap_path.append(1, 'a' + assigned_module);
if (cfg.KeyExists(dvap_path)) {
cfg.GetValue(dvap_path, estr, type, 1, 16);
if (type.compare("dvap")) {
fprintf(stderr, "%s = %s is not 'dvap' type!\n", dvap_path.c_str(), type.c_str());
return true;
}
} else {
fprintf(stderr, "Module '%c' is not defined.\n", 'a'+assigned_module);
return true;
}
}
RPTR_MOD = 'A' + assigned_module;
cfg.GetValue("gateway_gate2modem"+std::string(1, 'a'+assigned_module), estr, gate2modem, 1, FILENAME_MAX);
cfg.GetValue("gateway_modem2gate", estr, modem2gate, 1, FILENAME_MAX);
if (cfg.KeyExists(dvap_path+"_callsign")) {
if (cfg.GetValue(dvap_path+"_callsign", type, RPTR, 3, 6))
return true;
}
if (cfg.GetValue("ircddb_login", estr, OWNER, 3, 6))
return true;
if (RPTR.empty())
RPTR.assign(OWNER);
for (unsigned long i=0; i<RPTR.length(); i++) {
if (islower(RPTR.at(i)))
RPTR.at(i) = toupper(RPTR.at(i));
}
for (unsigned long i=0; i<OWNER.length(); i++) {
if (islower(OWNER.at(i)))
OWNER.at(i) = toupper(OWNER.at(i));
}
RPTR.resize(CALL_SIZE, ' ');
OWNER.resize(CALL_SIZE, ' ');
cfg.GetValue(dvap_path+"_serial_number", type, MODULE_SERIAL_NUMBER, 8, 10);
double f;
cfg.GetValue(dvap_path+"_frequency", type, f, 100.0, 1400.0);
MODULE_FREQUENCY = (int)(1.0e6*f);
cfg.GetValue(dvap_path+"_power", type, MODULE_POWER, -12, 10);
cfg.GetValue(dvap_path+"_squelch", type, MODULE_SQUELCH, -128, -45);
cfg.GetValue(dvap_path+"_offset", type, MODULE_OFFSET, -2000, 2000);
cfg.GetValue(dvap_path+"_packet_wait", type, MODULE_PACKET_WAIT, 6, 100);
cfg.GetValue(dvap_path+"_acknowledge", type, MODULE_ACKNOWLEDGE);
dvap_path.assign("timing_timeout_");
cfg.GetValue(dvap_path+"remote_g2", estr, TIMING_TIMEOUT_REMOTE_G2, 1, 10);
cfg.GetValue(dvap_path+"local_rptr", estr, TIMING_TIMEOUT_LOCAL_RPTR, 1.0, 10.0);
dvap_path.assign("timing_play_");
cfg.GetValue(dvap_path+"delay", estr, TIMING_PLAY_DELAY, 9, 25);
cfg.GetValue(dvap_path+"wait", estr, TIMING_PLAY_WAIT, 1, 10);
inactiveMax = (TIMING_TIMEOUT_REMOTE_G2 * 1000) / MODULE_PACKET_WAIT;
printf("Max loops = %d\n", inactiveMax);
/* convert to Microseconds */
MODULE_PACKET_WAIT *= 1000;
dvap_path.assign("log_");
cfg.GetValue(dvap_path+"qso", estr, LOG_QSO);
cfg.GetValue(dvap_path+"debug", estr, LOG_DEBUG);
return false;
}
static int open_sock()
{
Modem2Gate.SetUp(modem2gate.c_str());
if (Gate2Modem.Open(gate2modem.c_str()))
return 1;
return 0;
}
static void ReadFromGateway()
{
static unsigned short streamid = 0U;
static int inactive = 0;
int len = 0;
fd_set readfd;
struct timeval tv;
short seq_no = 0;
unsigned char sync_codes[3] = {0x55, 0x2d, 0x16};
SDSVT dsvt;
unsigned char frame_pos_to_dvap = 0;
unsigned char seq_to_dvap = 0;
unsigned char silence[12] = { 0x9e,0x8d,0x32,0x88,0x26,0x1a,0x3f,0x61,0xe8,0x70,0x4f,0x93 };
bool written_to_q = false;
unsigned char ctrl_in = 0x80;
while (keep_running) {
written_to_q = false;
len = 0;
tv.tv_sec = 0;
tv.tv_usec = MODULE_PACKET_WAIT;
FD_ZERO (&readfd);
int fd = Gate2Modem.GetFD();
FD_SET (fd, &readfd);
select(fd + 1, &readfd, NULL, NULL, &tv);
if (FD_ISSET(fd, &readfd)) {
len = Gate2Modem.Read(dsvt.title, 56);
if (len == 56) {
if (busy20000) {
FD_CLR (fd, &readfd);
continue;
}
if ('G' == dsvt.hdr.rpt1[7]) {
unsigned char tmp[8];
memcpy(tmp, dsvt.hdr.rpt1, 8);
memcpy(dsvt.hdr.rpt1, dsvt.hdr.rpt2, 8);
memcpy(dsvt.hdr.rpt2, tmp, 8);
}
/* check the module and gateway */
if (dsvt.hdr.rpt1[7] != RPTR_MOD) {
FD_CLR(fd, &readfd);
break;
}
memcpy(dsvt.hdr.rpt2, OWNER.c_str(), 7);
dsvt.hdr.rpt2[7] = 'G';
if (RPTR.compare(OWNER)) {
// restriction mode
memcpy(dsvt.hdr.rpt1, RPTR.c_str(), 7);
memcpy(dsvt.hdr.rpt2, RPTR.c_str(), 7);
if (memcmp(dsvt.hdr.mycall, OWNER.c_str(), 7) == 0) {
/* this is an ACK back */
memcpy(dsvt.hdr.mycall, RPTR.c_str(), 7);
}
}
if ((dsvt.hdr.flag[0] != 0x00) &&
(dsvt.hdr.flag[0] != 0x01) &&
(dsvt.hdr.flag[0] != 0x08) &&
(dsvt.hdr.flag[0] != 0x20) &&
(dsvt.hdr.flag[0] != 0x28) &&
(dsvt.hdr.flag[0] != 0x40)) {
FD_CLR(fd, &readfd);
break;
}
if (memcmp(dsvt.title, "DSVT", 4) || dsvt.id!=0x20 || dsvt.config!=0x10) {
FD_CLR(fd, &readfd);
break;
}
busy20000 = true;
ctrl_in = 0x80;
written_to_q = true;
if (LOG_QSO)
printf("Start G2: streamid=%04x, flags=%02x:%02x:%02x, my=%.8s, sfx=%.4s, ur=%.8s, rpt1=%.8s, rpt2=%.8s\n", ntohs(dsvt.streamid), dsvt.hdr.flag[0], dsvt.hdr.flag[1], dsvt.hdr.flag[2], dsvt.hdr.mycall, dsvt.hdr.sfx, dsvt.hdr.urcall, dsvt.hdr.rpt1, dsvt.hdr.rpt2);
/* save the streamid that is winning */
streamid = dsvt.streamid;
if (dsvt.hdr.flag[0] != 0x01) {
if (dsvt.hdr.flag[0] == 0x00)
dsvt.hdr.flag[0] = 0x40;
else if (dsvt.hdr.flag[0] == 0x08)
dsvt.hdr.flag[0] = 0x48;
else if (dsvt.hdr.flag[0] == 0x20)
dsvt.hdr.flag[0] = 0x60;
else if (dsvt.hdr.flag[0] == 0x28)
dsvt.hdr.flag[0] = 0x68;
else
dsvt.hdr.flag[0] = 0x40;
}
dsvt.hdr.flag[1] = dsvt.hdr.flag[2] = 0x00;
// write the header packet to the dvap here
while ((space < 1) && keep_running)
usleep(5);
SDVAP_REGISTER dr;
dr.header = 0xa02f;
dr.frame.streamid = streamid = dsvt.streamid;
dr.frame.framepos = 0x80;
dr.frame.seq = 0;
//memset(dvp_buf + 6, ' ', 41);
for (int f=0; f<3; f++)
dr.frame.hdr.flag[f] = dsvt.hdr.flag[0];
memcpy(dr.frame.hdr.rpt1, dsvt.hdr.rpt1, 8);
memcpy(dr.frame.hdr.rpt2, dsvt.hdr.rpt2, 8);
memcpy(dr.frame.hdr.urcall, dsvt.hdr.urcall, 8);
memcpy(dr.frame.hdr.mycall, dsvt.hdr.mycall, 8);
memcpy(dr.frame.hdr.sfx, dsvt.hdr.sfx, 4);
calcPFCS(dr.frame.hdr.flag, dr.frame.hdr.pfcs);
frame_pos_to_dvap = 0;
seq_to_dvap = 0;
dongle.SendRegister(dr);
inactive = 0;
seq_no = 0;
} else if (len == 27) {
if (busy20000) {
if (dsvt.streamid == streamid) {
if (dsvt.ctrl == ctrl_in) {
/* do not update written_to_q, ctrl_in */
; // printf("dup\n");
} else {
ctrl_in = dsvt.ctrl;
written_to_q = true;
if (seq_no == 0) {
dsvt.vasd.text[0] = 0x55;
dsvt.vasd.text[1] = 0x2d;
dsvt.vasd.text[2] = 0x16;
} else {
if ((dsvt.vasd.text[0] == 0x55) && (dsvt.vasd.text[1] == 0x2d) && (dsvt.vasd.text[2] == 0x16)) {
dsvt.vasd.text[0] = 0x70;
dsvt.vasd.text[1] = 0x4f;
dsvt.vasd.text[2] = 0x93;
}
}
// write the audio packet to the dvap here
while ((space < 1) && keep_running)
usleep(5);
SDVAP_REGISTER dr;
dr.header = 0xc012u;
if (memcmp(dsvt.vasd.text, sync_codes, 3) == 0)
frame_pos_to_dvap = 0;
dr.frame.streamid = streamid;
dr.frame.framepos = frame_pos_to_dvap;
if ((dsvt.ctrl & 0x40) != 0)
dr.frame.framepos |= 0x40U;
dr.frame.seq = seq_to_dvap;
memcpy(&dr.frame.vad.voice, dsvt.vasd.voice, 12);
dongle.SendRegister(dr);
frame_pos_to_dvap ++;
seq_to_dvap ++;
inactive = 0;
seq_no ++;
if (seq_no == 21)
seq_no = 0;
if ((dsvt.ctrl & 0x40) != 0) {
if (LOG_QSO)
printf("End G2: streamid=%04x\n", ntohs(dsvt.streamid));
streamid = 0;
inactive = 0;
FD_CLR (fd, &readfd);
// maybe put a sleep here to prevent fast voice-overs
busy20000 = false;
break;
}
}
}
} else { // busy20000 is false
FD_CLR (fd, &readfd);
break;
}
} else { // len is not 56 or 27
if (!busy20000) {
FD_CLR (fd, &readfd);
break;
}
}
FD_CLR (fd, &readfd);
}
// If we received a dup or select() timed out or streamids dont match,
// then written_to_q is false
if (!written_to_q) { // we could also end up here if we are busy and we received a non-standard packet size
if (busy20000) {
if (++inactive >= inactiveMax) {
if (LOG_QSO)
printf("G2 Timeout...\n");
streamid = 0;
inactive = 0;
// maybe put a sleep here to prevent fast voice-overs
busy20000 = false;
break;
} else { // inactive too long
if (space == 127) {
if (LOG_DEBUG)
fprintf(stderr, "sending silent frame where: len=%d, inactive=%d\n", len, inactive);
if (seq_no == 0) {
silence[9] = 0x55;
silence[10] = 0x2d;
silence[11] = 0x16;
} else {
silence[9] = 0x70;
silence[10] = 0x4f;
silence[11] = 0x93;
}
SDVAP_REGISTER dr;
dr.header = 0xc012u;
if (memcmp(silence + 9, sync_codes, 3) == 0)
frame_pos_to_dvap = 0;
dr.frame.streamid = streamid;
dr.frame.framepos = frame_pos_to_dvap;
dr.frame.seq = seq_to_dvap;
memcpy(&dr.frame.vad.voice, silence, 12);
dongle.SendRegister(dr);
frame_pos_to_dvap ++;
seq_to_dvap++;
seq_no++;
if (seq_no == 21)
seq_no = 0;
}
}
} else // busy20000 is false
break;
}
}
return;
}
static void RptrAckThread(SDVAP_ACK_ARG *parg)
{
char mycall[8];
memcpy(mycall, parg->mycall, 8);
float ber = parg->ber;
char RADIO_ID[21];
sprintf(RADIO_ID, "%20.2f", ber);
memcpy(RADIO_ID, "BER%", 4);
struct sigaction act;
unsigned char silence[12] = { 0x9e,0x8d,0x32,0x88,0x26,0x1a,0x3f,0x61,0xe8,0x70,0x4f,0x93 };
act.sa_handler = sig_catch;
sigemptyset(&act.sa_mask);
if (sigaction(SIGTERM, &act, 0) != 0) {
printf("sigaction-TERM failed, error=%d\n", errno);
return;
}
if (sigaction(SIGHUP, &act, 0) != 0) {
printf("sigaction-HUP failed, error=%d\n", errno);
return;
}
if (sigaction(SIGINT, &act, 0) != 0) {
printf("sigaction-INT failed, error=%d\n", errno);
return;
}
sleep(TIMING_PLAY_WAIT);
uint16_t sid = Random.NewStreamID();
// HEADER
while ((space < 1) && keep_running)
usleep(5);
SDVAP_REGISTER dr;
dr.header = 0xa02fu;
dr.frame.streamid = sid;
dr.frame.framepos = 0x80;
dr.frame.seq = 0;
dr.frame.hdr.flag[0] = 0x01;
dr.frame.hdr.flag[1] = dr.frame.hdr.flag[2] = 0x00;
memcpy(dr.frame.hdr.rpt2, RPTR_and_MOD, 8);
memcpy(dr.frame.hdr.rpt1, RPTR_and_G, 8);
memcpy(dr.frame.hdr.urcall, mycall, 8);
memcpy(dr.frame.hdr.mycall, RPTR_and_MOD, 8);
memcpy(dr.frame.hdr.sfx, (unsigned char *)"DVAP", 4);
calcPFCS(dr.frame.hdr.flag, dr.frame.hdr.pfcs);
dongle.SendRegister(dr);
std::this_thread::sleep_for(std::chrono::milliseconds(TIMING_PLAY_DELAY));
// SYNC
dr.header = 0xc012u;
dr.frame.streamid = sid;
for (int i=0; i<10; i++) {
while ((space < 1) && keep_running)
usleep(5);
dr.frame.framepos = dr.frame.seq = i;
switch (i) {
case 0:
silence[9] = 0x55;
silence[10] = 0x2d;
silence[11] = 0x16;
break;
case 1:
silence[9] = '@' ^ 0x70;
silence[10] = RADIO_ID[0] ^ 0x4f;
silence[11] = RADIO_ID[1] ^ 0x93;
break;
case 2:
silence[9] = RADIO_ID[2] ^ 0x70;
silence[10] = RADIO_ID[3] ^ 0x4f;
silence[11] = RADIO_ID[4] ^ 0x93;
break;
case 3:
silence[9] = 'A' ^ 0x70;
silence[10] = RADIO_ID[5] ^ 0x4f;
silence[11] = RADIO_ID[6] ^ 0x93;
break;
case 4:
silence[9] = RADIO_ID[7] ^ 0x70;
silence[10] = RADIO_ID[8] ^ 0x4f;
silence[11] = RADIO_ID[9] ^ 0x93;
break;
case 5:
silence[9] = 'B' ^ 0x70;
silence[10] = RADIO_ID[10] ^ 0x4f;
silence[11] = RADIO_ID[11] ^ 0x93;
break;
case 6:
silence[9] = RADIO_ID[12] ^ 0x70;
silence[10] = RADIO_ID[13] ^ 0x4f;
silence[11] = RADIO_ID[14] ^ 0x93;
break;
case 7:
silence[9] = 'C' ^ 0x70;
silence[10] = RADIO_ID[15] ^ 0x4f;
silence[11] = RADIO_ID[16] ^ 0x93;
break;
case 8:
silence[9] = RADIO_ID[17] ^ 0x70;
silence[10] = RADIO_ID[18] ^ 0x4f;
silence[11] = RADIO_ID[19] ^ 0x93;
break;
case 9:
silence[0] = 0x55;
silence[1] = 0xc8;
silence[2] = 0x7a;
silence[9] = 0x55;
silence[10] = 0x55;
silence[11] = 0x55;
dr.frame.framepos |= 0x40;
break;
}
memcpy(&dr.frame.vad.voice, silence, 12);
dongle.SendRegister(dr);
if (i < 9)
std::this_thread::sleep_for(std::chrono::milliseconds(TIMING_PLAY_DELAY));
}
return;
}
static void ReadDVAPThread()
{
REPLY_TYPE reply;
SDSVT dsvt;
SDVAP_REGISTER dr;
CTimer last_RF_time;
struct sigaction act;
bool dvap_busy = false;
// bool ptt = false;
bool the_end = true;
bool ok = true;
int i = 0;
u_int16_t streamid_raw = 0;
short int sequence = 0;
char mycall[8];
short int status_cntr = 3000;
int num_dv_frames = 0;
int num_bit_errors = 0;
act.sa_handler = sig_catch;
sigemptyset(&act.sa_mask);
if (sigaction(SIGTERM, &act, 0) != 0) {
printf("sigaction-TERM failed, error=%d\n", errno);
keep_running = false;
return;
}
if (sigaction(SIGHUP, &act, 0) != 0) {
printf("sigaction-HUP failed, error=%d\n", errno);
keep_running = false;
return;
}
if (sigaction(SIGINT, &act, 0) != 0) {
printf("sigaction-INT failed, error=%d\n", errno);
keep_running = false;
return;
}
while (keep_running) {
// local RF user went away ?
if (dvap_busy) {
if (last_RF_time.time() > TIMING_TIMEOUT_LOCAL_RPTR)
dvap_busy = false;
}
// read from the dvap and process
reply = dongle.GetReply(dr);
if (reply == RT_ERR) {
printf("Detected ERROR event from DVAP dongle, stopping...n");
break;
} else if (reply == RT_STOP) {
printf("Detected STOP event from DVAP dongle, stopping...\n");
break;
} else if (reply == RT_START) {
printf("Detected START event from DVAP dongle\n");
// else if (reply == RT_PTT) {
// ptt = (dvp_buf[4] == 0x01);
// printf("Detected PTT=%s\n", ptt?"on":"off");
} else if (reply == RT_STS) {
space = (unsigned int)dr.param.sstr[2];
if (status_cntr < 3000)
status_cntr += 20;
} else if (reply == RT_HDR) {
num_dv_frames = 0;
num_bit_errors = 0;
if (LOG_QSO)
printf("From DVAP: flags=%02x:%02x:%02x, my=%.8s, sfx=%.4s, ur=%.8s, rpt1=%.8s, rpt2=%.8s\n", dr.frame.hdr.flag[0], dr.frame.hdr.flag[1], dr.frame.hdr.flag[2], dr.frame.hdr.mycall, dr.frame.hdr.sfx, dr.frame.hdr.urcall, dr.frame.hdr.rpt1, dr.frame.hdr.rpt2);
ok = true;
/* Accept valid flags only */
if (ok) {
if ((dr.frame.hdr.flag[0] != 0x00) && (dr.frame.hdr.flag[0] != 0x08) && // net
(dr.frame.hdr.flag[0] != 0x20) && (dr.frame.hdr.flag[0] != 0x28) && // flags
(dr.frame.hdr.flag[0] != 0x40) && (dr.frame.hdr.flag[0] != 0x48) && // rptr
(dr.frame.hdr.flag[0] != 0x60) && (dr.frame.hdr.flag[0] != 0x68)) // flags
ok = false;
}
memcpy(dsvt.hdr.flag, dr.frame.hdr.flag, 41); // copy the header
/* RPT1 must always be the repeater + module */
memcpy(dsvt.hdr.rpt1, RPTR_and_MOD, 8);
/* copy RPT2 */
memcpy(dsvt.hdr.rpt2, dr.frame.hdr.rpt2, 8);
/* RPT2 must also be valid */
if ((dsvt.hdr.rpt2[7] == 'A') ||
(dsvt.hdr.rpt2[7] == 'B') ||
(dsvt.hdr.rpt2[7] == 'C') ||
(dsvt.hdr.rpt2[7] == 'G'))
memcpy(dsvt.hdr.rpt2, RPTR.c_str(), 7);
else
memset(dsvt.hdr.rpt2, ' ', 8);
if ((memcmp(dsvt.hdr.urcall, "CQCQCQ", 6) != 0) && (dsvt.hdr.rpt2[0] != ' '))
memcpy(dsvt.hdr.rpt2, RPTR_and_G, 8);
/* 8th in rpt1, rpt2 must be diff */
if (dsvt.hdr.rpt2[7] == dsvt.hdr.rpt1[7])
memset(dsvt.hdr.rpt2, ' ', 8);
/*
Are we restricting the RF user ?
If RPTR is OWNER, then any RF user can talk.
If RPTR is not OWNER,
that means that mycall, rpt1, rpt2 must be equal to RPTR
otherwise we drop the rf data
*/
if (RPTR.compare(OWNER)) {
if (memcmp(dsvt.hdr.mycall, RPTR.c_str(), CALL_SIZE) != 0) {
printf("mycall=[%.8s], not equal to %s\n", dsvt.hdr.mycall, RPTR.c_str());
ok = false;
}
} else if (memcmp(dsvt.hdr.mycall, " ", 8) == 0) {
printf("Invalid value for mycall=[%.8s]\n", dsvt.hdr.mycall);
ok = false;
}
if (ok) {
for (i = 0; i < 8; i++) {
if (!isupper(dsvt.hdr.mycall[i]) &&
!isdigit(dsvt.hdr.mycall[i]) &&
(dsvt.hdr.mycall[i] != ' ')) {
memset(dsvt.hdr.mycall, ' ', 8);
ok = false;
printf("Invalid value for MYCALL\n");
break;
}
}
for (i = 0; i < 4; i++) {
if (!isupper(dsvt.hdr.sfx[i]) &&
!isdigit(dsvt.hdr.sfx[i]) &&
(dsvt.hdr.sfx[i] != ' ')) {
memset(dsvt.hdr.sfx, ' ', 4);
break;
}
}
for (i = 0; i < 8; i++) {
if (!isupper(dsvt.hdr.urcall[i]) &&
!isdigit(dsvt.hdr.urcall[i]) &&
(dsvt.hdr.urcall[i] != ' ') &&
(dsvt.hdr.urcall[i] != '/')) {
memcpy(dsvt.hdr.urcall, "CQCQCQ ", 8);
break;
}
}
/*** what if YRCALL is all spaces, we can NOT allow that ***/
if (memcmp(dsvt.hdr.urcall, " ", 8) == 0)
memcpy(dsvt.hdr.urcall, "CQCQCQ ", 8);
/* change the rptr flags to net flags */
if (dr.frame.hdr.flag[0] == 0x40)
dsvt.hdr.flag[0] = 0x00;
else if (dr.frame.hdr.flag[0] == 0x48)
dsvt.hdr.flag[0] = 0x08;
else if (dr.frame.hdr.flag[0] == 0x60)
dsvt.hdr.flag[0] = 0x20;
else if (dr.frame.hdr.flag[0] == 0x68)
dsvt.hdr.flag[0] = 0x28;
else
dsvt.hdr.flag[0] = 0x00;
dsvt.hdr.flag[1] = dsvt.hdr.flag[2] = 0x00;
// Before we send the data to the local gateway,
// set RPT1, RPT2 to be the local gateway
memcpy(dsvt.hdr.rpt1, OWNER.c_str(), 7);
if (dsvt.hdr.rpt2[7] != ' ')
memcpy(dsvt.hdr.rpt2, OWNER.c_str(), 7);
memcpy(dsvt.title, "DSVT", 4);
dsvt.config = 0x10U;
dsvt.id = 0x20;
streamid_raw = Random.NewStreamID();
dsvt.streamid = streamid_raw;
dsvt.ctrl = 0x80;
sequence = 0;
calcPFCS((unsigned char *)&(dsvt.hdr), dsvt.hdr.pfcs);
Modem2Gate.Write(dsvt.title, 56);
// local RF user keying up, start timer
dvap_busy = true;
last_RF_time.start();
// save mycall for the ack later
memcpy(mycall, dr.frame.hdr.mycall, 8);
}
} else if (reply == RT_DAT) {
/* have we already received a header ? */
if (dvap_busy) {
the_end = ((dr.frame.framepos & 0x40) == 0x40);
dsvt.config = 0x20U;
dsvt.ctrl = sequence++;
if (the_end)
dsvt.ctrl = sequence | 0x40;
memcpy(&dsvt.vasd, &dr.frame.vad.voice, 12);
Modem2Gate.Write(dsvt.title, 27);
int ber_data[3];
int ber_errs = dstar_dv_decode(dsvt.vasd.voice, ber_data);
if (ber_data[0] != 0xf85) {
num_bit_errors += ber_errs;
num_dv_frames++;
}
if (sequence > 0x14)
sequence = 0;
// local RF user still talking, update timer
last_RF_time.start();
if (the_end) {
// local RF user stopped talking
dvap_busy = false;
static SDVAP_ACK_ARG dvap_ack_arg;
dvap_ack_arg.ber = (num_dv_frames==0) ? 0.f : 100.f * (float)num_bit_errors / (float)(num_dv_frames * 24);
if (LOG_QSO)
printf("End of dvap audio, ber=%.02f\n", dvap_ack_arg.ber);
if (MODULE_ACKNOWLEDGE && !busy20000) {
memcpy(dvap_ack_arg.mycall, mycall, 8);
try {
std::async(std::launch::async, RptrAckThread, &dvap_ack_arg);
} catch (const std::exception &e) {
printf("Failed to start RptrAckThread(). Exception: %s\n", e.what());
}
}
}
}
}
usleep(1000);
status_cntr--;
if (status_cntr < 0)
break;
}
/* stop dvap */
dongle.Stop();
close(serfd);
printf("ReadDVAPThread exiting\n");
keep_running = false;
return;
}
int main(int argc, const char **argv)
{
struct sigaction act;
int rc = -1;
short cnt = 0;
setvbuf(stdout, NULL, _IOLBF, 0);
printf("dvap_rptr VERSION %s\n", DVAP_VERSION);
if (argc != 2) {
fprintf(stderr, "Usage: %s dvap_rptr.cfg\n", argv[0]);
return 1;
}
if ('-' == argv[1][0]) {
printf("\nQnetDVAP Version #%s Copyright (C) 2018-2019 by Thomas A. Early N7TAE\n", DVAP_VERSION);
printf("QnetDVAP comes with ABSOLUTELY NO WARRANTY; see the LICENSE for details.\n");
printf("This is free software, and you are welcome to distribute it\nunder certain conditions that are discussed in the LICENSE file.\n\n");
return 0;
}
const char *qn = strstr(argv[0], "qndvap");
if (NULL == qn) {
fprintf(stderr, "Error finding 'qndvap' in %s!\n", argv[0]);
return 1;
}
qn += 6;
switch (*qn) {
case NULL:
assigned_module = -1;
break;
case 'a':
assigned_module = 0;
break;
case 'b':
assigned_module = 1;
break;
case 'c':
assigned_module = 2;
break;
default:
fprintf(stderr, "ERROR: '%s' is not a valid module\nassigned module must be a, b or c\n", argv[1]);
return 1;
}
if (ReadConfig(argv[1])) {
printf("Failed to process config file %s\n", argv[2]);
return 1;
}
if (RPTR.length() != 8) {
printf("Bad RPTR value, length must be exactly 8 bytes\n");
return 1;
}
if ((RPTR_MOD != 'A') && (RPTR_MOD != 'B') && (RPTR_MOD != 'C')) {
printf("Bad RPTR_MOD value, must be one of A or B or C\n");
return 1;
}
if (RPTR_MOD == 'A')
SND_TERM_ID = 0x03;
else if (RPTR_MOD == 'B')
SND_TERM_ID = 0x01;
else if (RPTR_MOD == 'C')
SND_TERM_ID = 0x02;
strcpy(RPTR_and_G, RPTR.c_str());
RPTR_and_G[7] = 'G';
strcpy(RPTR_and_MOD, RPTR.c_str());
RPTR_and_MOD[7] = RPTR_MOD;
CTimer ackpoint;
act.sa_handler = sig_catch;
sigemptyset(&act.sa_mask);
if (sigaction(SIGTERM, &act, 0) != 0) {
printf("sigaction-TERM failed, error=%d\n", errno);
return 1;
}
if (sigaction(SIGHUP, &act, 0) != 0) {
printf("sigaction-HUP failed, error=%d\n", errno);
return 1;
}
if (sigaction(SIGINT, &act, 0) != 0) {
printf("sigaction-INT failed, error=%d\n", errno);
return 1;
}
/* open dvp */
if (!dongle.Initialize(MODULE_SERIAL_NUMBER.c_str(), MODULE_FREQUENCY, MODULE_OFFSET, MODULE_POWER, MODULE_SQUELCH))
return 1;
rc = open_sock();
if (rc != 0) {
dongle.Stop();
close(serfd);
return 1;
}
printf("DVAP opened and initialized!\n");
dstar_dv_init();
std::future<void> readthread;
try {
readthread = std::async(std::launch::async, ReadDVAPThread);
} catch (const std::exception &e) {
printf("Unable to start ReadDVAPThread(). Exception: %s\n", e.what());
keep_running = false;
}
printf("Started ReadDVAPThread()\n");
while (keep_running) {
if (ackpoint.time() > 2.5) {
rc = dongle.KeepAlive();
if (rc < 0) {
cnt ++;
if (cnt > 5) {
printf("Could not send KEEPALIVE signal to dvap 5 times...exiting\n");
keep_running = false;
}
} else
cnt = 0;
ackpoint.start();
}
ReadFromGateway();
}
readthread.get();
Gate2Modem.Close();
printf("QnetDVAP exiting\n");
return 0;
}
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