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QnetLink.cpp
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QnetLink.cpp
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/*
* Copyright (C) 2010 by Scott Lawson KI4LKF
* Copyright (C) 2015,2008-2020 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.
*/
/* by KI4LKF and N7TAE*/
#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 <regex.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <iostream>
#include <sstream>
#include <fstream>
#include <future>
#include <exception>
#include <utility>
#include <thread>
#include <chrono>
#include <csignal>
#include "DPlusAuthenticator.h"
#include "QnetConfigure.h"
#include "QnetLink.h"
#include "Utilities.h"
#define LINK_VERSION "20223"
#ifndef BIN_DIR
#define BIN_DIR "/usr/local/bin"
#endif
#ifndef CFG_DIR
#define CFG_DIR "/usr/local/etc"
#endif
CQnetLink::CQnetLink()
{
}
CQnetLink::~CQnetLink()
{
speak.clear();
}
void CQnetLink::REFWrite(const void *buf, const size_t size, const CSockAddress &addr)
{
if (AF_INET == addr.GetFamily())
REFSock4.Write(buf, size, addr);
else if (uses_ipv6)
REFSock6.Write(buf, size, addr);
}
void CQnetLink::DCSWrite(const void *buf, const size_t size, const CSockAddress &addr)
{
if (AF_INET == addr.GetFamily())
DCSSock4.Write(buf, size, addr);
else if (uses_ipv6)
DCSSock6.Write(buf, size, addr);
}
void CQnetLink::XRFWrite(const void *buf, const size_t size, const CSockAddress &addr)
{
if (AF_INET == addr.GetFamily())
XRFSock4.Write(buf, size, addr);
else if (uses_ipv6)
XRFSock6.Write(buf, size, addr);
}
bool CQnetLink::resolve_rmt(const char *name, const unsigned short port, CSockAddress &addr)
{
struct addrinfo hints;
struct addrinfo *res;
struct addrinfo *rp;
bool found = false;
memset(&hints, 0x00, sizeof(struct addrinfo));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_DGRAM;
int rc = getaddrinfo(name, NULL, &hints, &res);
if (rc != 0)
{
printf("getaddrinfo return error code %d for [%s]\n", rc, name);
return false;
}
for (rp=res; rp!=NULL; rp=rp->ai_next)
{
if ((AF_INET==rp->ai_family || AF_INET6==rp->ai_family) && SOCK_DGRAM==rp->ai_socktype)
{
if (AF_INET == rp->ai_family)
{
char saddr[INET_ADDRSTRLEN];
struct sockaddr_in *addr4 = (struct sockaddr_in *)rp->ai_addr;
if (inet_ntop(rp->ai_family, &(addr4->sin_addr), saddr, INET_ADDRSTRLEN))
{
addr.Initialize(rp->ai_family, port, saddr);
found = true;
break;
}
}
else if (AF_INET6 == rp->ai_family)
{
char saddr[INET6_ADDRSTRLEN];
struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)rp->ai_addr;
if (inet_ntop(rp->ai_family, &(addr6->sin6_addr), saddr, INET6_ADDRSTRLEN))
{
addr.Initialize(rp->ai_family, port, saddr);
found = true;
break;
}
}
}
}
freeaddrinfo(res);
if (found && strcmp(name, addr.GetAddress()))
{
printf("Node address %s on port %u resolved to %s\n", name, port, addr.GetAddress());
}
return found;
}
/* send keepalive to donglers */
void CQnetLink::send_heartbeat()
{
// heartbeats for connected donglers
for (auto pos = inbound_list.begin(); pos != inbound_list.end(); pos++)
{
SINBOUND *inbound = (SINBOUND *)pos->second;
REFWrite(REF_ACK, 3, inbound->addr);
if (inbound->countdown >= 0)
inbound->countdown--;
if (inbound->countdown < 0)
{
printf("call=%s timeout, removing %s, users=%d\n", inbound->call, pos->first.c_str(), (int)inbound_list.size() - 1);
qnDB.DeleteLS(pos->first.c_str());
delete pos->second;
inbound_list.erase(pos);
}
}
/* send heartbeat to linked XRF repeaters/reflectors */
char cmd_2_dcs[23];
if (to_remote_g2[0].addr.GetPort() == rmt_xrf_port)
XRFWrite(owner.c_str(), CALL_SIZE+1, to_remote_g2[0].addr);
if ((to_remote_g2[1].addr.GetPort() == rmt_xrf_port) && (strcmp(to_remote_g2[1].cs, to_remote_g2[0].cs) != 0))
XRFWrite(owner.c_str(), CALL_SIZE+1, to_remote_g2[1].addr);
if ((to_remote_g2[2].addr.GetPort() == rmt_xrf_port) && (strcmp(to_remote_g2[2].cs, to_remote_g2[0].cs) != 0) && (strcmp(to_remote_g2[2].cs, to_remote_g2[1].cs) != 0))
XRFWrite(owner.c_str(), CALL_SIZE+1, to_remote_g2[2].addr);
/* send heartbeat to linked DCS reflectors */
if (to_remote_g2[0].addr.GetPort() == rmt_dcs_port)
{
strcpy(cmd_2_dcs, owner.c_str());
cmd_2_dcs[7] = to_remote_g2[0].from_mod;
memcpy(cmd_2_dcs + 9, to_remote_g2[0].cs, 8);
cmd_2_dcs[16] = to_remote_g2[0].to_mod;
DCSWrite(cmd_2_dcs, 17, to_remote_g2[0].addr);
}
if (to_remote_g2[1].addr.GetPort() == rmt_dcs_port)
{
strcpy(cmd_2_dcs, owner.c_str());
cmd_2_dcs[7] = to_remote_g2[1].from_mod;
memcpy(cmd_2_dcs + 9, to_remote_g2[1].cs, 8);
cmd_2_dcs[16] = to_remote_g2[1].to_mod;
DCSWrite(cmd_2_dcs, 17, to_remote_g2[1].addr);
}
if (to_remote_g2[2].addr.GetPort() == rmt_dcs_port)
{
strcpy(cmd_2_dcs, owner.c_str());
cmd_2_dcs[7] = to_remote_g2[2].from_mod;
memcpy(cmd_2_dcs + 9, to_remote_g2[2].cs, 8);
cmd_2_dcs[16] = to_remote_g2[2].to_mod;
DCSWrite(cmd_2_dcs, 17, to_remote_g2[2].addr);
}
/* send heartbeat to linked REF reflectors */
if (to_remote_g2[0].is_connected && to_remote_g2[0].addr.GetPort()==rmt_ref_port)
REFWrite(REF_ACK, 3, to_remote_g2[0].addr);
if (to_remote_g2[1].is_connected && to_remote_g2[1].addr.GetPort()==rmt_ref_port && strcmp(to_remote_g2[1].cs, to_remote_g2[0].cs))
REFWrite(REF_ACK, 3, to_remote_g2[1].addr);
if (to_remote_g2[2].is_connected && to_remote_g2[2].addr.GetPort()==rmt_ref_port && strcmp(to_remote_g2[2].cs, to_remote_g2[0].cs) && strcmp(to_remote_g2[2].cs, to_remote_g2[1].cs))
REFWrite(REF_ACK, 3, to_remote_g2[2].addr);
for (int i=0; i<3; i++)
{
/* check for timeouts from remote */
if (to_remote_g2[i].cs[0] != '\0')
{
if (to_remote_g2[i].countdown >= 0)
to_remote_g2[i].countdown--;
if (to_remote_g2[i].countdown < 0)
{
/* maybe remote system has changed IP */
printf("Unlinked from [%s] mod %c, TIMEOUT...\n", to_remote_g2[i].cs, to_remote_g2[i].to_mod);
sprintf(notify_msg[i], "%c_unlinked.dat_LINK_TIMEOUT", to_remote_g2[i].from_mod);
qnDB.DeleteLS(to_remote_g2[i].addr.GetAddress());
if (to_remote_g2[i].auto_link)
{
char cs[CALL_SIZE+1];
memcpy(cs, to_remote_g2[i].cs, CALL_SIZE+1); // call is passed by pointer so we have to copy it
g2link(to_remote_g2[i].from_mod, cs, to_remote_g2[i].to_mod);
}
else
{
to_remote_g2[i].cs[0] = '\0';
to_remote_g2[i].from_mod = to_remote_g2[i].to_mod = ' ';
to_remote_g2[i].addr.Clear();
to_remote_g2[i].countdown = 0;
to_remote_g2[i].is_connected = false;
to_remote_g2[i].in_streamid = 0x0;
}
}
}
/*** check for RF inactivity ***/
if (to_remote_g2[i].is_connected)
{
if (((tnow - tracing[i].last_time) > rf_inactivity_timer[i]) && (rf_inactivity_timer[i] > 0))
{
tracing[i].last_time = 0;
printf("Unlinked from [%s] mod %c, local RF inactivity...\n", to_remote_g2[i].cs, to_remote_g2[i].to_mod);
if (to_remote_g2[i].addr.GetPort() == rmt_ref_port)
{
queryCommand[0] = 5;
queryCommand[1] = 0;
queryCommand[2] = 24;
queryCommand[3] = 0;
queryCommand[4] = 0;
REFWrite(queryCommand, 5, to_remote_g2[i].addr);
/* zero out any other entries here that match that system */
for (int j=0; j<3; j++)
{
if (j != i)
{
if (to_remote_g2[j].addr == to_remote_g2[i].addr)
{
to_remote_g2[j].cs[0] = '\0';
to_remote_g2[j].addr.Clear();
to_remote_g2[j].from_mod = ' ';
to_remote_g2[j].to_mod = ' ';
to_remote_g2[j].countdown = 0;
to_remote_g2[j].is_connected = false;
to_remote_g2[j].in_streamid = 0x0;
}
}
}
}
else if (to_remote_g2[i].addr.GetPort() == rmt_xrf_port)
{
char unlink_request[CALL_SIZE + 3];
strcpy(unlink_request, owner.c_str());
unlink_request[8] = to_remote_g2[i].from_mod;
unlink_request[9] = ' ';
unlink_request[10] = '\0';
for (int j=0; j<5; j++)
XRFWrite(unlink_request, CALL_SIZE+3, to_remote_g2[i].addr);
}
else if (to_remote_g2[i].addr.GetPort() == rmt_dcs_port)
{
strcpy(cmd_2_dcs, owner.c_str());
cmd_2_dcs[8] = to_remote_g2[i].from_mod;
cmd_2_dcs[9] = ' ';
cmd_2_dcs[10] = '\0';
memcpy(cmd_2_dcs + 11, to_remote_g2[i].cs, 8);
for (int j=0; j<2; j++)
DCSWrite(cmd_2_dcs, 19, to_remote_g2[i].addr);
}
qnDB.DeleteLS(to_remote_g2[i].addr.GetAddress());
sprintf(notify_msg[i], "%c_unlinked.dat_UNLINKED_TIMEOUT", to_remote_g2[i].from_mod);
to_remote_g2[i].cs[0] = '\0';
to_remote_g2[i].addr.Clear();
to_remote_g2[i].from_mod = to_remote_g2[i].to_mod = ' ';
to_remote_g2[i].countdown = 0;
to_remote_g2[i].is_connected = false;
to_remote_g2[i].in_streamid = 0x0;
}
}
}
}
void CQnetLink::rptr_ack(int i)
{
static char mod_and_RADIO_ID[3][22];
memset(mod_and_RADIO_ID[i], ' ', 21);
mod_and_RADIO_ID[i][21] = '\0';
if (i == 0)
mod_and_RADIO_ID[i][0] = 'A';
else if (i == 1)
mod_and_RADIO_ID[i][0] = 'B';
else if (i == 2)
mod_and_RADIO_ID[i][0] = 'C';
if (to_remote_g2[i].is_connected)
{
memcpy(mod_and_RADIO_ID[i] + 1, "LINKED TO ", 10);
memcpy(mod_and_RADIO_ID[i] + 11, to_remote_g2[i].cs, CALL_SIZE);
mod_and_RADIO_ID[i][11 + CALL_SIZE] = to_remote_g2[i].to_mod;
}
else if (to_remote_g2[i].cs[0] != '\0')
{
memcpy(mod_and_RADIO_ID[i] + 1, "TRYING ", 10);
memcpy(mod_and_RADIO_ID[i] + 11, to_remote_g2[i].cs, CALL_SIZE);
mod_and_RADIO_ID[i][11 + CALL_SIZE] = to_remote_g2[i].to_mod;
}
else
{
memcpy(mod_and_RADIO_ID[i] + 1, "NOT LINKED", 10);
}
try
{
std::async(std::launch::async, &CQnetLink::RptrAckThread, this, mod_and_RADIO_ID[i]);
}
catch (const std::exception &e)
{
printf("Failed to start RptrAckThread(). Exception: %s\n", e.what());
}
return;
}
void CQnetLink::RptrAckThread(char *arg)
{
char from_mod = arg[0];
char RADIO_ID[21];
memcpy(RADIO_ID, arg + 1, 21);
unsigned char silence[12] = { 0x9E, 0x8D, 0x32, 0x88, 0x26, 0x1A, 0x3F, 0x61, 0xE8, 0x16, 0x29, 0xf5 };
short int streamid_raw = Random.NewStreamID();
sleep(delay_before);
printf("sending ACK+text, mod:[%c], RADIO_ID=[%s]\n", from_mod, RADIO_ID);
SDSVT dsvt;
memcpy(dsvt.title, "DSVT", 4);
dsvt.config = 0x10;
dsvt.flaga[0] = dsvt.flaga[1] = dsvt.flaga[2] = 0x0;
dsvt.id = 0x20;
dsvt.flagb[0] = 0x0;
dsvt.flagb[1] = 0x1;
dsvt.flagb[2] = ('A' == from_mod) ? 0x3 : from_mod - 'A';
dsvt.streamid = htons(streamid_raw);
dsvt.ctrl = 0x80;
dsvt.hdr.flag[0] = 0x1;
dsvt.hdr.flag[1] = dsvt.hdr.flag[2] = 0x0;
memcpy(dsvt.hdr.rpt1, owner.c_str(), CALL_SIZE);
dsvt.hdr.rpt1[7] = from_mod;
memcpy(dsvt.hdr.rpt2, owner.c_str(), CALL_SIZE);
dsvt.hdr.rpt2[7] = 'G';
memcpy(dsvt.hdr.urcall, "CQCQCQ ", CALL_SIZE);
memcpy(dsvt.hdr.mycall, owner.c_str(), CALL_SIZE);
dsvt.hdr.mycall[7] = from_mod;
memcpy(dsvt.hdr.sfx, "RPTR", 4);
calcPFCS(dsvt.title,56);
ToGate.Write(dsvt.title, 56);
//std::this_thread::sleep_for(std::chrono::milliseconds(delay_between))
dsvt.config = 0x20;
memcpy(dsvt.vasd.voice, silence, 9);
/* start sending silence + announcement text */
for (int i=0; i<10; i++)
{
dsvt.ctrl = (unsigned char)i;
switch (i)
{
case 0:
dsvt.vasd.text[0] = 0x55;
dsvt.vasd.text[1] = 0x2d;
dsvt.vasd.text[2] = 0x16;
break;
case 1:
dsvt.vasd.text[0] = '@' ^ 0x70;
dsvt.vasd.text[1] = RADIO_ID[0] ^ 0x4f;
dsvt.vasd.text[2] = RADIO_ID[1] ^ 0x93;
break;
case 2:
dsvt.vasd.text[0] = RADIO_ID[2] ^ 0x70;
dsvt.vasd.text[1] = RADIO_ID[3] ^ 0x4f;
dsvt.vasd.text[2] = RADIO_ID[4] ^ 0x93;
break;
case 3:
dsvt.vasd.text[0] = 'A' ^ 0x70;
dsvt.vasd.text[1] = RADIO_ID[5] ^ 0x4f;
dsvt.vasd.text[2] = RADIO_ID[6] ^ 0x93;
break;
case 4:
dsvt.vasd.text[0] = RADIO_ID[7] ^ 0x70;
dsvt.vasd.text[1] = RADIO_ID[8] ^ 0x4f;
dsvt.vasd.text[2] = RADIO_ID[9] ^ 0x93;
break;
case 5:
dsvt.vasd.text[0] = 'B' ^ 0x70;
dsvt.vasd.text[1] = RADIO_ID[10] ^ 0x4f;
dsvt.vasd.text[2] = RADIO_ID[11] ^ 0x93;
break;
case 6:
dsvt.vasd.text[0] = RADIO_ID[12] ^ 0x70;
dsvt.vasd.text[1] = RADIO_ID[13] ^ 0x4f;
dsvt.vasd.text[2] = RADIO_ID[14] ^ 0x93;
break;
case 7:
dsvt.vasd.text[0] = 'C' ^ 0x70;
dsvt.vasd.text[1] = RADIO_ID[15] ^ 0x4f;
dsvt.vasd.text[2] = RADIO_ID[16] ^ 0x93;
break;
case 8:
dsvt.vasd.text[0] = RADIO_ID[17] ^ 0x70;
dsvt.vasd.text[1] = RADIO_ID[18] ^ 0x4f;
dsvt.vasd.text[2] = RADIO_ID[19] ^ 0x93;
break;
case 9:
dsvt.ctrl |= 0x40;
dsvt.vasd.text[0] = 0x16;
dsvt.vasd.text[1] = 0x29;
dsvt.vasd.text[2] = 0xf5;
break;
}
ToGate.Write(dsvt.title, 27);
if (i < 9)
std::this_thread::sleep_for(std::chrono::milliseconds(delay_between));
}
}
/* Open text file of repeaters, reflectors */
void CQnetLink::LoadGateways(const std::string &filename)
{
qnDB.ClearGW();
const std::string website("auth.dstargateway.org");
int dplus = 0;
// DPlus Authenticate
if (dplus_authorize && !dplus_priority)
{
CDPlusAuthenticator auth(login_call, website);
dplus = auth.Process(qnDB, dplus_reflectors, dplus_repeaters);
if (0 == dplus)
fprintf(stdout, "DPlus Authorization failed.\n");
else
fprintf(stderr, "DPlus Authorization complete!\n");
}
int count = 0;
std::ifstream hostfile(filename);
if (hostfile.is_open())
{
CHostQueue hqueue;
std::string line;
while (std::getline(hostfile, line))
{
trim(line);
if (! line.empty() && ('#' != line.at(0)))
{
std::istringstream iss(line);
std::string host, address;
unsigned short port;
iss >> host >> address >> port;
hqueue.Push(CHost(host, address, port));
count++;
}
}
hostfile.close();
if (! hqueue.Empty())
qnDB.UpdateGW(hqueue);
}
if (dplus_authorize)
{
if (! dplus_priority)
printf("#Gateways: %s=%d %s=%d Total=%d\n", website.c_str(), dplus, filename.c_str(), count, qnDB.Count("GATEWAYS"));
}
else
{
printf("#Gateways: %s=%d\n", filename.c_str(), count);
}
// DPlus Authenticate
if (dplus_authorize && dplus_priority)
{
CDPlusAuthenticator auth(login_call, website);
dplus = auth.Process(qnDB, dplus_reflectors, dplus_repeaters);
if (0 == dplus)
{
printf("#Gateways: %s=%d\n", filename.c_str(), count);
fprintf(stdout, "DPlus Authorization failed.\n");
}
else
{
fprintf(stderr, "DPlus Authorization completed!\n");
printf("#Gateways %s=%d %s=%d Total=%d\n", filename.c_str(), count, website.c_str(), dplus, qnDB.Count("GATEWAYS"));
}
}
}
/* compute checksum */
void CQnetLink::calcPFCS(unsigned char *packet, int len)
{
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;
unsigned short tmp;
short int low, high;
if (len == 56)
{
low = 15;
high = 54;
}
else if (len == 58)
{
low = 17;
high = 56;
}
else
return;
for (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;
}
void CQnetLink::ToUpper(std::string &s)
{
for (auto it=s.begin(); it!=s.end(); it++)
if (islower(*it))
*it = toupper(*it);
}
void CQnetLink::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()<=6)
{
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 CQnetLink::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");
}
/* process configuration file */
bool CQnetLink::ReadConfig(const char *cfgFile)
{
CQnetConfigure cfg;
const std::string estr; // an empty string
printf("Reading file %s\n", cfgFile);
if (cfg.Initialize(cfgFile))
return true;
std::string key("ircddb_login");
if (cfg.GetValue(key, estr, owner, 3, 6))
return true;
ToUpper(owner);
owner.resize(CALL_SIZE, ' ');
std::string host;
cfg.GetValue("ircddb0_host", estr, host, 0, MAXHOSTNAMELEN);
if (host.npos == host.find("v6."))
{
cfg.GetValue("ircddb1_host", estr, host, 0, MAXHOSTNAMELEN);
uses_ipv6 = (host.npos == host.find("v6.")) ? false : true;
}
else
{
uses_ipv6 = true;
}
if (uses_ipv6)
printf("IPv6 linking is enabled\n");
int modules = 0;
for (int i=0; i<3; i++)
{
key.assign("module_");
key.append(1, 'a'+i);
if (cfg.KeyExists(key))
{
std::string modem_type;
cfg.GetValue(key, estr, modem_type, 1, 16);
modules++;
cfg.GetValue(key+"_inactivity", modem_type, rf_inactivity_timer[i], 0, 300);
rf_inactivity_timer[i] *= 60;
cfg.GetValue(key+"_link_at_start", modem_type, link_at_startup[i], 0, 8);
cfg.GetValue(key+"_auto_link", modem_type, to_remote_g2[i].auto_link);
}
}
if (0 == modules)
{
fprintf(stderr, "no rf modules defined!\n");
return true;
}
std::string csv;
key.assign("link_admin");
if (cfg.KeyExists(key))
{
cfg.GetValue(key, estr, csv, 0, 10240);
UnpackCallsigns(csv, admin);
PrintCallsigns(key, admin);
}
csv.clear();
key.assign("link_no_link_unlink");
if (cfg.KeyExists(key))
{
cfg.GetValue(key, estr, csv, 0, 10240);
UnpackCallsigns(csv, link_blacklist);
PrintCallsigns(key, link_blacklist);
}
else
{
csv.clear();
key.assign("link_link_unlink");
if (cfg.KeyExists(key))
{
cfg.GetValue(key, estr, csv, 0, 10240);
UnpackCallsigns(csv, link_unlink_user);
PrintCallsigns(key, link_unlink_user);
}
}
key.assign("link_");
int port;
cfg.GetValue(key+"ref_port", estr, port, 10000, 65535);
rmt_ref_port = (unsigned short)port;
cfg.GetValue(key+"xrf_port", estr, port, 10000, 65535);
rmt_xrf_port = (unsigned short)port;
cfg.GetValue(key+"dcs_port", estr, port, 10000, 65535);
rmt_dcs_port = (unsigned short)port;
cfg.GetValue(key+"acknowledge", estr, bool_rptr_ack);
cfg.GetValue(key+"announce", estr, announce);
int maxdongle;
cfg.GetValue(key+"max_dongles", estr, maxdongle, 0, 10);
saved_max_dongles = max_dongles = (unsigned int)maxdongle;
key.assign("gateway_");
cfg.GetValue(key+"to_link", estr, togate, 1, FILENAME_MAX);
cfg.GetValue("log_qso", estr, qso_details);
cfg.GetValue("log_debug", estr, log_debug);
key.assign("file_");
cfg.GetValue(key+"gwys", estr, gwys, 2, FILENAME_MAX);
cfg.GetValue(key+"qnvoice_file", estr, qnvoice_file, 2, FILENAME_MAX);
cfg.GetValue(key+"announce_dir", estr, announce_dir, 2, FILENAME_MAX);
key.assign("timing_play_");
cfg.GetValue(key+"wait", estr, delay_before, 1, 10);
cfg.GetValue(key+"delay", estr, delay_between, 9, 25);
key.assign("dplus_");
cfg.GetValue(key+"authorize", estr, dplus_authorize);
cfg.GetValue(key+"use_reflectors", estr, dplus_reflectors);
cfg.GetValue(key+"use_repeaters", estr, dplus_repeaters);
cfg.GetValue(key+"ref_login", estr, login_call, 0, 6);
if (login_call.length() < 4)
{
login_call.assign(owner);
}
else
{
ToUpper(login_call);
login_call.resize(CALL_SIZE, ' ');
}
cfg.GetValue(key+"priority", estr, dplus_priority);
return false;
}
/* create our server */
bool CQnetLink::srv_open()
{
if (uses_ipv6)
{
if (XRFSock6.Open(CSockAddress(AF_INET6, rmt_xrf_port, "any")) || DCSSock6.Open(CSockAddress(AF_INET6, rmt_dcs_port, "any")) || REFSock6.Open(CSockAddress(AF_INET6, rmt_ref_port, "any")))
{
srv_close();
return true;
}
}
if (XRFSock4.Open(CSockAddress(AF_INET, rmt_xrf_port, "any")) || DCSSock4.Open(CSockAddress(AF_INET, rmt_dcs_port, "any")) || REFSock4.Open(CSockAddress(AF_INET, rmt_ref_port, "any")))
{
srv_close();
return true;
}
/* create our gateway unix sockets */
printf("Connecting to qngateway at %s\n", togate.c_str());
if (ToGate.Open(togate.c_str(), this))
{
srv_close();
return true;
}
/* initialize all remote links */
for (int i = 0; i < 3; i++)
{
to_remote_g2[i].cs[0] = '\0';
to_remote_g2[i].addr.Clear();
to_remote_g2[i].from_mod = ' ';
to_remote_g2[i].to_mod = ' ';
to_remote_g2[i].countdown = 0;
to_remote_g2[i].is_connected = false;
to_remote_g2[i].in_streamid = 0x0;
to_remote_g2[i].out_streamid = 0x0;
}
return false;
}
/* destroy our server */
void CQnetLink::srv_close()
{
XRFSock6.Close();
DCSSock6.Close();
REFSock6.Close();
XRFSock4.Close();
DCSSock4.Close();
REFSock4.Close();
ToGate.Close();
}
/* find the repeater IP by callsign and link to it */
void CQnetLink::g2link(const char from_mod, const char *call, const char to_mod)
{
char linked_remote_system[CALL_SIZE + 1];
char link_request[519];
bool ok = false;
memset(link_request, 0, sizeof(link_request));
int i;
if (from_mod == 'A')
i = 0;
else if (from_mod == 'B')
i = 1;
else if (from_mod == 'C')
i = 2;
else
{
printf("from_mod %c invalid\n", from_mod);
return;
}
to_remote_g2[i].addr.Clear();
to_remote_g2[i].countdown = 0;
to_remote_g2[i].from_mod = '\0';
to_remote_g2[i].in_streamid = 0;
to_remote_g2[i].is_connected = false;
to_remote_g2[i].out_streamid = 0;
to_remote_g2[i].cs[0] = '\0';
to_remote_g2[i].to_mod = '\0';
std::string address;
unsigned short port;
if (qnDB.FindGW(call, address, port))
{
sprintf(notify_msg[i], "%c_gatewaynotfound.dat_GATEWAY_NOT_FOUND", from_mod);
printf("%s not found in gwy list\n", call);
return;
}
strcpy(to_remote_g2[i].cs, call);
to_remote_g2[i].to_mod = to_mod;
if ((memcmp(call, "REF", 3) == 0) || (memcmp(call, "DCS", 3) == 0))
{
int counter;
for (counter = 0; counter < 3; counter++)
{
if (counter != i)
{
if ('\0'!=to_remote_g2[counter].cs[0] && !strcmp(to_remote_g2[counter].cs,to_remote_g2[i].cs) && to_remote_g2[counter].to_mod==to_remote_g2[i].to_mod)
break;
}
}
to_remote_g2[i].cs[0] = '\0';
to_remote_g2[i].to_mod = ' ';
if (counter < 3)
{
printf("Another mod(%c) is already linked to %s %c\n", to_remote_g2[counter].from_mod, to_remote_g2[counter].cs, to_remote_g2[counter].to_mod);
return;
}
}
if (address.size())
{
ok = resolve_rmt(address.c_str(), port, to_remote_g2[i].addr);
if (!ok)
{
printf("Call %s is host %s but could not resolve to IP\n", call, address.c_str());
to_remote_g2[i].addr.Clear();
to_remote_g2[i].countdown = 0;
to_remote_g2[i].from_mod = '\0';
to_remote_g2[i].in_streamid = 0;
to_remote_g2[i].is_connected = false;
to_remote_g2[i].out_streamid = 0;
to_remote_g2[i].cs[0] = '\0';
to_remote_g2[i].to_mod = '\0';
return;
}
strcpy(to_remote_g2[i].cs, call);
to_remote_g2[i].from_mod = from_mod;
to_remote_g2[i].to_mod = to_mod;
to_remote_g2[i].countdown = TIMEOUT;
to_remote_g2[i].is_connected = false;
to_remote_g2[i].in_streamid= 0x0;
/* is it XRF? */
if (port == rmt_xrf_port)
{
strcpy(link_request, owner.c_str());
link_request[8] = from_mod;
link_request[9] = to_mod;
link_request[10] = '\0';
printf("sending link request from mod %c to link with: [%s] mod %c [%s]:%u\n", to_remote_g2[i].from_mod, to_remote_g2[i].cs, to_remote_g2[i].to_mod, address.c_str(), port);
for (int j=0; j<5; j++)
XRFWrite(link_request, CALL_SIZE + 3, to_remote_g2[i].addr);
}
else if (port == rmt_dcs_port)
{
strcpy(link_request, owner.c_str());
link_request[8] = from_mod;
link_request[9] = to_mod;
link_request[10] = '\0';
memcpy(link_request + 11, to_remote_g2[i].cs, 8);
strcpy(link_request + 19, "<table border=\"0\" width=\"95%\"><tr><td width=\"4%\"><img border=\"0\" src=g2ircddb.jpg></td><td width=\"96%\"><font size=\"2\"><b>REPEATER</b> QnetGateway v1.0+</font></td></tr></table>");
printf("sending link request from mod %c to link with: [%s] mod %c [%s]:%u\n", to_remote_g2[i].from_mod, to_remote_g2[i].cs, to_remote_g2[i].to_mod, address.c_str(), port);
DCSWrite(link_request, 519, to_remote_g2[i].addr);
}
else if (port == rmt_ref_port)
{
int counter;
for (counter = 0; counter < 3; counter++)
{
if (counter != i)
{
if ( (to_remote_g2[counter].cs[0] != '\0') && (strcmp(to_remote_g2[counter].cs, to_remote_g2[i].cs) == 0) )
break;
}
}
if (counter > 2)
{
printf("sending link command from mod %c to: [%s] mod %c [%s]:%u\n", to_remote_g2[i].from_mod, to_remote_g2[i].cs, to_remote_g2[i].to_mod, address.c_str(), port);
queryCommand[0] = 5;
queryCommand[1] = 0;
queryCommand[2] = 24;
queryCommand[3] = 0;
queryCommand[4] = 1;
REFWrite(queryCommand, 5, to_remote_g2[i].addr);
}
else
{
if (to_remote_g2[counter].is_connected)
{
to_remote_g2[i].is_connected = true;
printf("Local module %c is also connected to %s %c\n", from_mod, call, to_mod);
tracing[i].last_time = time(NULL);
// announce it here
strcpy(linked_remote_system, to_remote_g2[i].cs);
auto space_p = strchr(linked_remote_system, ' ');
if (space_p)
*space_p = '\0';
sprintf(notify_msg[i], "%c_linked.dat_LINKED_%s_%c", to_remote_g2[i].from_mod, linked_remote_system, to_remote_g2[i].to_mod);
}
else
printf("status from %s %c pending\n", to_remote_g2[i].cs, to_remote_g2[i].to_mod);
}
}
}
return;
}
void CQnetLink::ProcessXRF(unsigned char *buf, const int length)
{
const std::string ip(fromDst4.GetAddress());
char call[CALL_SIZE + 1];
memcpy(call, buf, CALL_SIZE);
call[CALL_SIZE] = '\0';