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QnetGateway.cpp
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QnetGateway.cpp
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/*
* Copyright (C) 2010 by Scott Lawson KI4LKF
* Copyright (C) 2017-2021 by Thomas 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.
*/
#include <stdio.h>
#include <fcntl.h>
#include <string.h>
#include <ctype.h>
#include <stdlib.h>
#include <stdarg.h>
#include <unistd.h>
#include <errno.h>
#include <math.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <regex>
#include <future>
#include <exception>
#include <string>
#include <thread>
#include <chrono>
#include <csignal>
#include "IRCDDB.h"
#include "IRCutils.h"
#include "QnetConfigure.h"
#include "QnetGateway.h"
#include "Utilities.h"
#ifndef CFG_DIR
#define CFG_DIR "/usr/local/etc"
#endif
const std::string GW_VERSION("20223");
int CQnetGateway::FindIndex(const int i) const
{
if (i<0 || i > 2)
return -1;
int index = Index[i];
if (index < 0)
{
if (AF_INET == link_family[i])
{
index = ii[1] ? 1 : 0;
}
else if (AF_INET6 == link_family[i])
{
index = 0;
}
}
return index;
}
bool CQnetGateway::Printable(unsigned char *s)
{
bool rval = false;
for (unsigned i=0; s[i]; i++)
{
if (0 == isprint(s[i]))
{
rval = true;
s[i] = '?';
}
}
return rval;
}
bool CQnetGateway::VoicePacketIsSync(const unsigned char *text) const
{
return *text==0x55U && *(text+1)==0x2DU && *(text+2)==0x16U;
}
void CQnetGateway::UnpackCallsigns(const std::string &str, std::set<std::string> &set, const std::string &delimiters)
{
std::string::size_type lastPos = str.find_first_not_of(delimiters, 0); // Skip delimiters at beginning.
std::string::size_type pos = str.find_first_of(delimiters, lastPos); // Find first non-delimiter.
while (std::string::npos != pos || std::string::npos != lastPos)
{
std::string element = str.substr(lastPos, pos-lastPos);
if (element.length()>=3 && element.length()<=8)
{
ToUpper(element);
element.resize(CALL_SIZE, ' ');
set.insert(element); // Found a token, add it to the list.
}
else
fprintf(stderr, "found bad callsign in list: %s\n", str.c_str());
lastPos = str.find_first_not_of(delimiters, pos); // Skip delimiters.
pos = str.find_first_of(delimiters, lastPos); // Find next non-delimiter.
}
}
void CQnetGateway::PrintCallsigns(const std::string &key, const std::set<std::string> &set)
{
printf("%s = [", key.c_str());
for (auto it=set.begin(); it!=set.end(); it++)
{
if (it != set.begin())
printf(",");
printf("%s", (*it).c_str());
}
printf("]\n");
}
void CQnetGateway::set_dest_rptr(const char mod, std::string &call)
{
std::list<CLink> linklist;
if (qnDB.FindLS(mod, linklist))
return;
auto count = linklist.size();
if (count != 1)
printf("set_dest_rptr() returned %d link sets\n", int(count));
if (0 == count)
return;
call.assign(linklist.front().callsign);
}
/* compute checksum */
void CQnetGateway::calcPFCS(unsigned char *packet, int len)
{
const 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
};
unsigned short crc_dstar_ffff = 0xffff;
short int low, high;
unsigned short tmp;
switch (len)
{
case 56:
low = 15;
high = 54;
break;
case 58:
low = 17;
high = 56;
break;
default:
return;
}
for (unsigned short int i = low; i < high ; i++)
{
unsigned short 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;
if (len == 56)
{
packet[54] = (unsigned char)(crc_dstar_ffff & 0xff);
packet[55] = (unsigned char)((tmp >> 8) & 0xff);
}
else
{
packet[56] = (unsigned char)(crc_dstar_ffff & 0xff);
packet[57] = (unsigned char)((tmp >> 8) & 0xff);
}
return;
}
/* process configuration file */
bool CQnetGateway::ReadConfig(char *cfgFile)
{
const std::string estr; // an empty string
CQnetConfigure cfg;
if (cfg.Initialize(cfgFile))
return true;
// ircddb
std::string path("ircddb_login");
if (cfg.GetValue(path, estr, owner, 3, CALL_SIZE-2))
return true;
OWNER = owner;
ToLower(owner);
ToUpper(OWNER);
printf("OWNER='%s'\n", OWNER.c_str());
OWNER.resize(CALL_SIZE, ' ');
path.assign("ircddb");
for (int i=0; i<2; i++)
{
std::string p(path + std::to_string(i) + "_");
cfg.GetValue(p+"host", estr, ircddb[i].ip, 0, MAXHOSTNAMELEN);
cfg.GetValue(p+"port", estr, ircddb[i].port, 1000, 65535);
cfg.GetValue(p+"password", estr, IRCDDB_PASSWORD[i], 0, 512);
}
if ((ircddb[0].ip.size()+ircddb[1].ip.size() > 0) && (0 == ircddb[0].ip.compare(ircddb[1].ip)))
{
fprintf(stderr, "IRC networks must be different\n");
return true;
}
// module
for (int m=0; m<3; m++)
{
path.assign("module_");
path.append(1, 'a' + m);
std::string type;
if (cfg.GetValue(path, estr, type, 1, 16))
{
Rptr.mod[m].defined = false;
}
else
{
printf("Found Module: %s = '%s'\n", path.c_str(), type.c_str());
if (0 == type.compare("icom"))
{
Rptr.mod[m].package_version.assign(GW_VERSION);
}
else
{
printf("module type '%s' is invalid\n", type.c_str());
return true;
}
Rptr.mod[m].defined = true;
path.append(1, '_');
if (cfg.KeyExists(path+"tx_frequency"))
{
cfg.GetValue(path+"tx_frequency", type, Rptr.mod[m].frequency, 0.0, 6.0E9);
double rx_freq;
cfg.GetValue(path+"rx_frequency", type, rx_freq, 0.0, 6.0E9);
if (0.0 == rx_freq)
rx_freq = Rptr.mod[m].frequency;
Rptr.mod[m].offset = rx_freq - Rptr.mod[m].frequency;
}
else
{
Rptr.mod[m].frequency = Rptr.mod[m].offset = 0.0;
}
cfg.GetValue("gateway_latitude", estr, Rptr.mod[m].latitude, -90.0, 90.0);
cfg.GetValue("gateway_longitude", estr, Rptr.mod[m].longitude, -180.0, 180.0);
cfg.GetValue("gateway_desc1", estr, Rptr.mod[m].desc1, 0, 20);
cfg.GetValue("gateway_desc2", estr, Rptr.mod[m].desc2, 0, 20);
cfg.GetValue("gateway_url", estr, Rptr.mod[m].url, 0, 80);
cfg.GetValue(path+"range", type, Rptr.mod[m].range, 0.0, 1609344.0);
cfg.GetValue(path+"agl", type, Rptr.mod[m].agl, 0.0, 1000.0);
}
}
if (! (Rptr.mod[0].defined || Rptr.mod[1].defined || Rptr.mod[2].defined))
{
printf("No modules defined!\n");
return true;
}
// gateway
path.assign("gateway_");
cfg.GetValue(path+"ip", estr, g2_external.ip, 7, 64);
cfg.GetValue(path+"port", estr, g2_external.port, 1024, 65535);
cfg.GetValue(path+"ipv6_ip", estr, g2_ipv6_external.ip, 7, 64);
cfg.GetValue(path+"ipv6_port", estr, g2_ipv6_external.port, 1024, 65535);
cfg.GetValue(path+"header_regen", estr, GATEWAY_HEADER_REGEN);
cfg.GetValue(path+"send_qrgs_maps", estr, GATEWAY_SEND_QRGS_MAP);
cfg.GetValue(path+"to_link", estr, to_link, 1, FILENAME_MAX);
cfg.GetValue(path+"fromremote", estr, fromremote, 1, FILENAME_MAX);
cfg.GetValue(path+"to_icom", estr, to_icom, 1, FILENAME_MAX);
path.append("find_route");
if (cfg.KeyExists(path))
{
std::string csv;
cfg.GetValue(path, estr, csv, 0, 10240);
UnpackCallsigns(csv, findRoute);
PrintCallsigns(path, findRoute);
}
// APRS
path.assign("aprs_");
cfg.GetValue(path+"enable", estr, APRS_ENABLE);
cfg.GetValue(path+"host", estr, Rptr.aprs.ip, 7, MAXHOSTNAMELEN);
cfg.GetValue(path+"port", estr, Rptr.aprs.port, 10000, 65535);
cfg.GetValue(path+"interval", estr, Rptr.aprs_interval, 40, 1000);
cfg.GetValue(path+"filter", estr, Rptr.aprs_filter, 0, 512);
// log
path.assign("log_");
cfg.GetValue(path+"qso", estr, LOG_QSO);
cfg.GetValue(path+"irc", estr, LOG_IRC);
cfg.GetValue(path+"dtmf", estr, LOG_DTMF);
cfg.GetValue(path+"debug", estr, LOG_DEBUG);
// file
path.assign("file_");
cfg.GetValue(path+"echotest", estr, FILE_ECHOTEST, 2, FILENAME_MAX);
cfg.GetValue(path+"dtmf", estr, FILE_DTMF, 2, FILENAME_MAX);
cfg.GetValue(path+"qnvoice_file", estr, FILE_QNVOICE_FILE, 2, FILENAME_MAX);
// timing
path.assign("timing_play_");
cfg.GetValue(path+"wait", estr, TIMING_PLAY_WAIT, 1, 10);
cfg.GetValue(path+"delay", estr, TIMING_PLAY_DELAY, 9, 25);
path.assign("timing_timeout_");
cfg.GetValue(path+"echo", estr, TIMING_TIMEOUT_ECHO, 1, 10);
cfg.GetValue(path+"voicemail", estr, TIMING_TIMEOUT_VOICEMAIL, 1, 10);
cfg.GetValue(path+"remote_g2", estr, TIMING_TIMEOUT_REMOTE_G2, 1, 10);
cfg.GetValue(path+"local_rptr", estr, TIMING_TIMEOUT_LOCAL_RPTR, 1, 10);
// dashboard
path.assign("dash_");
cfg.GetValue(path+"show_order", estr, DASH_SHOW_ORDER, 2, 17);
showLastHeard = (std::string::npos != DASH_SHOW_ORDER.find("LH"));
return false;
}
// Create ports
int CQnetGateway::open_port(const SPORTIP *pip, int family)
{
CSockAddress sin(family, pip->port, pip->ip.c_str());
int sock = socket(family, SOCK_DGRAM, 0);
if (0 > sock)
{
printf("Failed to create socket on %s:%d, errno=%d, %s\n", pip->ip.c_str(), pip->port, errno, strerror(errno));
return -1;
}
fcntl(sock, F_SETFL, O_NONBLOCK);
//int reuse = 1;
//if (::setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char *)&reuse, sizeof(reuse)) == -1) {
// printf("Cannot set the UDP socket (port %u) option, err: %d, %s\n", pip->port, errno, strerror(errno));
// return -1;
//}
if (bind(sock, sin.GetCPointer(), sizeof(struct sockaddr_storage)) != 0)
{
printf("Failed to bind %s:%d, errno=%d, %s\n", pip->ip.c_str(), pip->port, errno, strerror(errno));
close(sock);
return -1;
}
return sock;
}
/* receive data from the irc server and save it */
void CQnetGateway::GetIRCDataThread(const int i)
{
IRCDDB_RESPONSE_TYPE type;
short last_status = 0;
short threshold = 0;
bool not_announced[3];
for (int i=0; i<3; i++)
not_announced[i] = Rptr.mod[i].defined; // announce to all modules that are defined!
bool is_quadnet = (std::string::npos != ircddb[i].ip.find(".openquad.net"));
bool doFind = true;
while (IsRunning())
{
int rc = ii[i]->getConnectionState();
if (rc > 5 && rc < 8 && is_quadnet)
{
char ch = '\0';
if (not_announced[0])
ch = 'A';
else if (not_announced[1])
ch = 'B';
else if (not_announced[2])
ch = 'C';
if (ch)
{
// we need to announce, but can we?
struct stat sbuf;
if (stat(FILE_QNVOICE_FILE.c_str(), &sbuf))
{
// yes, there is no FILE_QNVOICE_FILE, so create it
FILE *fp = fopen(FILE_QNVOICE_FILE.c_str(), "w");
if (fp)
{
fprintf(fp, "%c_connected2network.dat_WELCOME_TO_QUADNET", ch);
fclose(fp);
not_announced[ch - 'A'] = false;
}
else
fprintf(stderr, "could not open %s\n", FILE_QNVOICE_FILE.c_str());
}
}
if (doFind)
{
printf("Finding Routes for...\n");
for (auto it=findRoute.begin(); it!=findRoute.end(); it++)
{
std::this_thread::sleep_for(std::chrono::milliseconds(800));
printf("\t'%s'\n", it->c_str());
ii[i]->findUser(*it);
}
doFind = false;
}
}
threshold++;
if (threshold >= 100)
{
if ((rc == 0) || (rc == 10))
{
if (last_status != 0)
{
printf("irc status=%d, probable disconnect...\n", rc);
last_status = 0;
}
}
else if (rc == 7)
{
if (last_status != 2)
{
printf("irc status=%d, probable connect...\n", rc);
last_status = 2;
}
}
else
{
if (last_status != 1)
{
printf("irc status=%d, probable connect...\n", rc);
last_status = 1;
}
}
threshold = 0;
}
while (((type = ii[i]->getMessageType()) != IDRT_NONE) && IsRunning())
{
switch (type)
{
case IDRT_PING:
{
std::string rptr, gate, addr;
ii[i]->receivePing(rptr);
if (! rptr.empty())
{
ReplaceChar(rptr, '_', ' ');
ii[i]->cache.findRptrData(rptr, gate, addr);
if (addr.empty())
break;
CSockAddress to;
if (addr.npos == addr.find(':'))
to.Initialize(AF_INET, (unsigned short)g2_external.port, addr.c_str());
else
to.Initialize(AF_INET6, (unsigned short)g2_ipv6_external.port, addr.c_str());
sendto(g2_sock[i], "PONG", 4, 0, to.GetCPointer(), to.GetSize());
if (LOG_QSO)
printf("Sent 'PONG' to %s\n", addr.c_str());
}
}
break;
default:
break;
} // switch (type)
} // while (IsRunning())
std::this_thread::sleep_for(std::chrono::milliseconds(500));
}
printf("GetIRCDataThread[%i] exiting...\n", i);
return;
}
/* return codes: 0=OK(found it), 1=TRY AGAIN, 2=FAILED(bad data) */
int CQnetGateway::get_yrcall_rptr_from_cache(const int i, const std::string &call, std::string &rptr, std::string &gate, std::string &addr, char RoU)
{
switch (RoU)
{
case 'U':
ii[i]->cache.findUserData(call, rptr, gate, addr);
if (rptr.empty())
{
printf("Could not find last heard repeater for user '%s'\n", call.c_str());
return 1;
}
break;
case 'R':
rptr.assign(call);
ii[i]->cache.findRptrData(call, gate, addr);
break;
default:
fprintf(stderr, "ERROR: Invalid Rou of '%c'\n", RoU);
return 2;
}
std::string temp;
if (rptr.at(7) == 'G')
{
fprintf(stderr, "ERROR: Invalid module %c\n", rptr.at(7));
return 2;
}
if (addr.empty())
{
printf("Couldn't find IP address for %s\n", ('R' == RoU) ? "repeater" : "user");
return 1;
}
return 0;
}
int CQnetGateway::get_yrcall_rptr(const std::string &call, std::string &rptr, std::string &gate, std::string &addr, char RoU)
// returns 0 if unsuccessful, otherwise returns ii index plus one
{
int rval[2] = { 1, 1 };
for (int i=0; i<2; i++)
{
if (ii[i])
{
rval[i] = get_yrcall_rptr_from_cache(i, call, rptr, gate, addr, RoU);
if (0 == rval[i])
return i + 1;
}
}
/* at this point, the data is not in cache */
for (int i=0; i<2; i++)
{
if (ii[i] && (1 == rval[i]))
{
if (ii[i]->getConnectionState() > 5)
{
// we can try a find
if (RoU == 'U')
{
printf("User [%s] not in local cache, try again\n", call.c_str());
/*** YRCALL=KJ4NHFBL ***/
if (((call.at(6) == 'A') || (call.at(6) == 'B') || (call.at(6) == 'C')) && (call.at(7) == 'L'))
printf("If this was a gateway link request, that is ok\n");
if (!ii[i]->findUser(call))
printf("findUser(%s): Network error\n", call.c_str());
}
else if (RoU == 'R')
{
printf("Repeater [%s] not found\n", call.c_str());
}
}
}
}
return 0;
}
bool CQnetGateway::Flag_is_ok(unsigned char flag)
{
// normal break emr emr+break
return 0x00U==flag || 0x08U==flag || 0x20U==flag || 0x28U==flag;
}
void CQnetGateway::ProcessTimeouts()
{
for (int i=0; i<3; i++)
{
time_t t_now;
/* echotest recording timed out? */
if (recd[i].last_time != 0)
{
time(&t_now);
if ((t_now - recd[i].last_time) > TIMING_TIMEOUT_ECHO)
{
printf("Inactivity on echotest recording module %c, removing stream id=%04x\n", 'A'+i, ntohs(recd[i].streamid));
recd[i].streamid = 0;
recd[i].last_time = 0;
close(recd[i].fd);
recd[i].fd = -1;
// printf("Closed echotest audio file:[%s]\n", recd[i].file);
/* START: echotest thread setup */
try
{
std::async(std::launch::async, &CQnetGateway::PlayFileThread, this, std::ref(recd[i]));
}
catch (const std::exception &e)
{
printf("Failed to start echotest thread. Exception: %s\n", e.what());
// when the echotest thread runs, it deletes the file,
// Because the echotest thread did NOT start, we delete the file here
unlink(recd[i].file);
}
/* END: echotest thread setup */
}
}
/* voicemail recording timed out? */
if (vm[i].last_time != 0)
{
time(&t_now);
if ((t_now - vm[i].last_time) > TIMING_TIMEOUT_VOICEMAIL)
{
printf("Inactivity on voicemail recording module %c, removing stream id=%04x\n", 'A'+i, ntohs(vm[i].streamid));
vm[i].streamid = 0;
vm[i].last_time = 0;
close(vm[i].fd);
vm[i].fd = -1;
// printf("Closed voicemail audio file:[%s]\n", vm[i].file);
}
}
// any stream going to local repeater timed out?
if (toRptr[i].last_time != 0)
{
time(&t_now);
// The stream can be from a cross-band, or from a remote system,
// so we could use either FROM_LOCAL_RPTR_TIMEOUT or FROM_REMOTE_G2_TIMEOUT
// but FROM_REMOTE_G2_TIMEOUT makes more sense, probably is a bigger number
if ((t_now - toRptr[i].last_time) > TIMING_TIMEOUT_REMOTE_G2)
{
printf("Inactivity to local rptr module %c, removing stream id %04x\n", 'A'+i, ntohs(toRptr[i].saved_hdr.streamid));
// Send end_of_audio to local repeater.
// Let the repeater re-initialize
end_of_audio.streamid = toRptr[i].saved_hdr.streamid;
end_of_audio.ctrl = toRptr[i].sequence | 0x40;
ToIcom.Write(end_of_audio.title, 27);
toRptr[i].last_time = 0;
}
}
/* any stream coming from local repeater timed out ? */
if (band_txt[i].last_time != 0)
{
time(&t_now);
if ((t_now - band_txt[i].last_time) > TIMING_TIMEOUT_LOCAL_RPTR)
{
/* This local stream never went to a remote system, so trace the timeout */
if (to_remote_g2[i].toDstar.AddressIsZero())
printf("Inactivity from local rptr module %c, removing stream id %04x\n", 'A'+i, ntohs(band_txt[i].streamID));
band_txt[i].Initialize();
}
}
/* any stream from local repeater to a remote gateway timed out ? */
if (! to_remote_g2[i].toDstar.AddressIsZero())
{
time(&t_now);
if ((t_now - to_remote_g2[i].last_time) > TIMING_TIMEOUT_LOCAL_RPTR)
{
printf("Inactivity from local rptr mod %c, removing stream id %04x\n", 'A'+i, ntohs(to_remote_g2[i].streamid));
to_remote_g2[i].toDstar.Clear();
to_remote_g2[i].streamid = 0;
to_remote_g2[i].last_time = 0;
}
}
}
}
bool CQnetGateway::ProcessG2Msg(const unsigned char *data, const int mod, std::string &smrtgrp)
{
static unsigned int part[3] = { 0 };
static char txt[3][21];
if ((data[0] != 0x55u) || (data[1] != 0x2du) || (data[2] != 0x16u))
{
const unsigned char c[3] =
{
static_cast<unsigned char>(data[0] ^ 0x70u),
static_cast<unsigned char>(data[1] ^ 0x4fu),
static_cast<unsigned char>(data[2] ^ 0x93u)
}; // unscramble
if (part[mod])
{
// we are in a message
if (part[mod] % 2)
{
// this is the second part of the 2-frame pair
memcpy(txt[mod]+(5u*(part[mod]/2u)+2u), c, 3);
if (++part[mod] > 7)
{
// we've got everything!
part[mod] = 0; // now we can start over
if (0 == strncmp(txt[mod], "VIA SMARTGP ", 12))
smrtgrp.assign(txt[mod]+12);
if (smrtgrp.size() < 8)
{
// something bad happened
smrtgrp.empty();
return false;
}
return true;
}
}
else // we'll get here when part[mod] = 2, 4 or 6
{
unsigned int sequence = part[mod]++ / 2; // this is the sequency we are expecting, 1, 2 or 3
if ((sequence | 0x40u) == c[0])
{
memcpy(txt[mod]+(5u*sequence), c+1, 2); // got it, copy the 2 remainin chars
}
else
{
part[mod] = 0; // unexpected
}
}
}
else if (0x40u == c[0])
{
// start a new message
memcpy(txt[mod], c+1, 2);
memset(txt[mod]+2, 0, 19);
part[mod] = 1;
}
}
else
{
part[mod] = 0; // messages will never be spread across a superframe
}
return false;
}
void CQnetGateway::ProcessIncomingSD(const SDSVT &dsvt, const int source_sock)
{
int i;
for (i=0; i<3; i++)
{
if (Rptr.mod[i].defined && (toRptr[i].saved_hdr.streamid == dsvt.streamid))
break;
}
// if i==3, then the streamid of this voice packet didn't match any module
SSD &sd = sdin[i];
if (VoicePacketIsSync(dsvt.vasd.text))
{
sd.first = true;
return;
}
const unsigned char c[3] =
{
static_cast<unsigned char>(dsvt.vasd.text[0] ^ 0x70u),
static_cast<unsigned char>(dsvt.vasd.text[1] ^ 0x4fu),
static_cast<unsigned char>(dsvt.vasd.text[2] ^ 0x93u)
}; // unscramble
if (sd.first)
{
// this is the first of a two voice-packet pair
// get the "size" and type from the first byte
sd.size = 0x0FU & c[0];
if (sd.size > 5)
{
sd.size = 5;
}
int size = sd.size;
if (size > 2)
size = 2;
sd.type = 0xF0U & c[0];
switch (sd.type)
{
case 0x30U: // GPS data
if (sd.size + sd.ig < 255)
{
memcpy(sd.gps+sd.ig, c+1, size);
if (c[1]=='\r' || c[2]=='\r')
{
sd.gps[sd.ig + ((c[1] == '\r') ? 0 : 1)] = '\0';
if (i < 3)
{
Printable(sd.gps);
if (showLastHeard && gps.Parse((const char *)&sd.gps))
{
char call[CALL_SIZE+1];
memcpy(call, toRptr[i].saved_hdr.hdr.mycall, CALL_SIZE);
call[CALL_SIZE] = '\0';
qnDB.UpdatePosition(call, gps.MaidenHead(), gps.Latitude(), gps.Longitude());
}
}
sd.ig = sd.size = 0;
}
else
{
sd.ig += size;
sd.size -= size;
}
}
else
{
printf("GPS string is too large at %d bytes\n", sd.ig + sd.size);
sd.ig = sd.size = 0;
}
sd.first = false;
break;
case 0x40U: // 20 character user message
if (sd.size * 5 == sd.im)
{
memcpy(sd.message+sd.im, c+1, 2);
sd.im += 2;
sd.size = 3;
}
else
{
//printf("A message voiceframe, #%d, is out of order because message size is %d\n", sd.size, sd.im);
sd.im = sd.size = 0;
}
sd.first = false;
break;
case 0x50U: // header
if (3 == i) // only when the streamid can't be matched
{
if (sd.size + sd.ih < 42) // make sure there's room
{
memcpy(sd.header+sd.ih, c+1, size);
sd.ih += size;
if (sd.ih == 41) // we have liftoff, calculate the checksum
{
memcpy(sdheader.hdr.flag, sd.header, 39);
calcPFCS(sdheader.title, 56);
if (0 == memcmp(sd.header+39, sdheader.hdr.pfcs, 2)) // checksum looks okay
{
int mod = sdheader.hdr.rpt2[CALL_SIZE-1] - 'A'; // the sd header lists the gateway first, so we check here to see if there's a match
if (mod >= 0 && mod < 3 && Rptr.mod[mod].defined)
{
printf("Got a slow data header: %36.36s\n", sd.header+3);
unsigned char call[CALL_SIZE]; // swap rpt1 and rpt2
memcpy(call, sdheader.hdr.rpt1, CALL_SIZE);
memcpy(sdheader.hdr.rpt1, sdheader.hdr.rpt2, CALL_SIZE);
memcpy(sdheader.hdr.rpt2, call, CALL_SIZE);
calcPFCS(sdheader.title, 56);
ProcessG2Header(sdheader, source_sock); // start the voice stream
sd.ih = sd.size = 0;
}
else
{
fprintf(stderr, "Got a valid slow data header but module %d doesn't exist\n", mod);
}
}
}
}
else
{
//printf("Header overflow, message has %d bytes, trying to add %d more\n", sd.ih, sd.size);
sd.ih = sd.size = 0;
}
}
sd.first = false;
break;
}
}
else
{
// this is the second of a two voice-frame pair
sd.first = true;
if (0 == sd.size)
return;
switch (sd.type)
{
case 0x30U: // GPS
memcpy(sd.gps+sd.ig, c, sd.size);
if (c[0]=='\r' || c[1]=='\r' || c[2]=='\r')
{
if (c[0]=='\r')
sd.gps[sd.ig] = '\0';
else if (c[1]=='\r')
sd.gps[sd.ig+1] = '\0';
else
sd.gps[sd.ig+2] = '\0';
if (i < 3)
{
Printable(sd.gps);
if (showLastHeard && gps.Parse((const char *)&sd.gps))
{
char call[CALL_SIZE+1];
memcpy(call, toRptr[i].saved_hdr.hdr.mycall, CALL_SIZE);
call[CALL_SIZE] = '\0';
qnDB.UpdatePosition(call, gps.MaidenHead(), gps.Latitude(), gps.Longitude());
}
}
sd.ig = 0;
}
else
{
sd.ig += sd.size;
sd.gps[sd.ig] = 0;
}
break;
case 0x40U: // message
memcpy(sd.message+sd.im, c, 3);
sd.im += 3;
if (sd.im >= 20)
{
sd.message[20] = '\0';
Printable(sd.message);
if (showLastHeard && (i < 3) && memcmp(toRptr[i].saved_hdr.hdr.sfx, "RPTR", 4) && memcmp(sd.message, "VIA SMARTGP", 11))
{
char call[CALL_SIZE+1];
memcpy(call, toRptr[i].saved_hdr.hdr.mycall, CALL_SIZE);
call[CALL_SIZE] = '\0';
qnDB.UpdateMessage(call, (const char *)&(sd.message));
}
sd.im = 0;
}
break;
case 0x50U: // header
if ((3 == i) && sd.size)
{
memcpy(sd.header+sd.ih, c, 3);
sd.ih += 3;
}
break;
}
}
}
void CQnetGateway::ProcessOutGoingSD(const SDSVT &dsvt, const int i)
{
if (i > 2)
return;
SSD &sd = sdout[i];
if (VoicePacketIsSync(dsvt.vasd.text))
{
sd.first = true;
return;
}
const unsigned char c[3] =
{
static_cast<unsigned char>(dsvt.vasd.text[0] ^ 0x70u),
static_cast<unsigned char>(dsvt.vasd.text[1] ^ 0x4fu),
static_cast<unsigned char>(dsvt.vasd.text[2] ^ 0x93u)
}; // unscramble
if (sd.first)
{
// this is the first of a two voice-packet pair
// get the "size" and type from the first byte
sd.size = 0x0FU & c[0];
if (sd.size > 5)
{
sd.size = 5;
}
int size = sd.size;
if (size > 2)
size = 2;
sd.type = 0xF0U & c[0];
switch (sd.type)
{
case 0x30U: // GPS data
if (sd.size + sd.ig < 255)
{
memcpy(sd.gps+sd.ig, c+1, size);
if (c[1]=='\r' || c[2]=='\r')
{
sd.gps[sd.ig + ((c[1] == '\r') ? 0 : 1)] = '\0';
if (i < 3)
{
Printable(sd.gps);
if (showLastHeard && gps.Parse((const char *)&sd.gps))
{
qnDB.UpdatePosition(band_txt[i].mycall.c_str(), gps.MaidenHead(), gps.Latitude(), gps.Longitude());
if (APRS_ENABLE && (! band_txt[i].is_gps_sent) && (time(NULL) - band_txt[i].gps_last_time > 30))
{
std::string call(band_txt[i].mycall);
const char *s = gps.APRS(call, Rptr.mod[i].call.c_str());
if (! aprs->aprs_sock.Write((unsigned char *)s, strlen(s)))
{
time(&band_txt[i].gps_last_time);
band_txt[i].is_gps_sent = true;
}
}
}