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265 lines
6.2 KiB
265 lines
6.2 KiB
/*
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* Copyright (C) 2009-2014,2016,2017,2018 by Jonathan Naylor G4KLX
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "YSFDefines.h"
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#include "FCSNetwork.h"
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#include "Utils.h"
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#include "Log.h"
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#include <cstdio>
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#include <cassert>
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#include <cstring>
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const char* FCS_VERSION = "MMDVM";
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const unsigned int BUFFER_LENGTH = 200U;
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CFCSNetwork::CFCSNetwork(unsigned int port, const std::string& callsign, unsigned int rxFrequency, unsigned int txFrequency, const std::string& locator, unsigned int id, bool debug) :
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m_socket(port),
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m_debug(debug),
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m_address(),
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m_ping(NULL),
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m_info(NULL),
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m_reflector(),
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m_print(),
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m_buffer(1000U, "FCS Network Buffer"),
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m_n(0U),
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m_pingTimer(1000U, 0U, 800U),
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m_resetTimer(1000U, 1U),
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m_state(FCS_UNLINKED)
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{
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m_info = new unsigned char[100U];
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::sprintf((char*)m_info, "%9u%9u%-6.6s%-12.12s%7u", rxFrequency, txFrequency, locator.c_str(), FCS_VERSION, id);
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::memset(m_info + 43U, ' ', 57U);
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m_ping = new unsigned char[25U];
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::memcpy(m_ping + 0U, "PING", 4U);
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::memset(m_ping + 4U, ' ', 6U);
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::memcpy(m_ping + 4U, callsign.c_str(), callsign.size());
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::memset(m_ping + 10U, 0x00U, 15U);
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}
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CFCSNetwork::~CFCSNetwork()
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{
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delete[] m_info;
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delete[] m_ping;
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}
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bool CFCSNetwork::open()
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{
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LogMessage("Resolving FCS00x addresses");
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m_addresses["FCS001"] = CUDPSocket::lookup("fcs001.xreflector.net");
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m_addresses["FCS002"] = CUDPSocket::lookup("fcs002.xreflector.net");
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m_addresses["FCS003"] = CUDPSocket::lookup("fcs003.xreflector.net");
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m_addresses["FCS004"] = CUDPSocket::lookup("fcs004.xreflector.net");
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m_addresses["FCS005"] = CUDPSocket::lookup("fcs005.xreflector.net");
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m_addresses["FCS222"] = CUDPSocket::lookup("fcs222.xreflector.net");
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m_addresses["FCS224"] = CUDPSocket::lookup("fcs224.xreflector.net");
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m_addresses["FCS232"] = CUDPSocket::lookup("fcs232.xreflector.net");
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m_addresses["FCS260"] = CUDPSocket::lookup("fcs260.xreflector.net");
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LogMessage("Opening FCS network connection");
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return m_socket.open();
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}
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void CFCSNetwork::clearDestination()
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{
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m_pingTimer.stop();
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m_resetTimer.stop();
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m_state = FCS_UNLINKED;
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}
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void CFCSNetwork::write(const unsigned char* data)
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{
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assert(data != NULL);
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if (m_state != FCS_LINKED)
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return;
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unsigned char buffer[130U];
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::memset(buffer + 0U, ' ', 130U);
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::memcpy(buffer + 0U, data + 35U, 120U);
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::memcpy(buffer + 121U, m_reflector.c_str(), 8U);
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if (m_debug)
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CUtils::dump(1U, "FCS Network Data Sent", buffer, 130U);
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m_socket.write(buffer, 130U, m_address, FCS_PORT);
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}
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bool CFCSNetwork::writeLink(const std::string& reflector)
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{
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if (m_state != FCS_LINKED) {
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std::string name = reflector.substr(0U, 6U);
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if (m_addresses.count(name) == 0U) {
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LogError("Unknown FCS reflector - %s", name.c_str());
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return false;
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}
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m_address = m_addresses[name];
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if (m_address.s_addr == INADDR_NONE) {
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LogError("FCS reflector %s has no address", name.c_str());
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return false;
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}
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}
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m_reflector = reflector;
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::memcpy(m_ping + 10U, reflector.c_str(), 8U);
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m_print = reflector.substr(0U, 6U) + "-" + reflector.substr(6U);
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m_state = FCS_LINKING;
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m_pingTimer.start();
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writePing();
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return true;
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}
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void CFCSNetwork::writeUnlink(unsigned int count)
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{
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if (m_state != FCS_LINKED)
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return;
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for (unsigned int i = 0U; i < count; i++)
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m_socket.write((unsigned char*)"CLOSE ", 11U, m_address, FCS_PORT);
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}
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void CFCSNetwork::clock(unsigned int ms)
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{
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m_pingTimer.clock(ms);
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if (m_pingTimer.isRunning() && m_pingTimer.hasExpired()) {
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writePing();
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m_pingTimer.start();
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}
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m_resetTimer.clock(ms);
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if (m_resetTimer.isRunning() && m_resetTimer.hasExpired()) {
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m_n = 0U;
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m_resetTimer.stop();
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}
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unsigned char buffer[BUFFER_LENGTH];
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in_addr address;
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unsigned int port;
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int length = m_socket.read(buffer, BUFFER_LENGTH, address, port);
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if (length <= 0)
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return;
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if (m_state == FCS_UNLINKED)
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return;
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if (address.s_addr != m_address.s_addr || port != FCS_PORT)
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return;
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if (m_debug)
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CUtils::dump(1U, "FCS Network Data Received", buffer, length);
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if (length == 7) {
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if (m_state == FCS_LINKING)
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LogMessage("Linked to %s", m_print.c_str());
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m_state = FCS_LINKED;
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writeInfo();
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}
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if (length == 10 && m_state == FCS_LINKING) {
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LogMessage("Linked to %s", m_print.c_str());
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m_state = FCS_LINKED;
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writeInfo();
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}
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if (length == 7 || length == 10 || length == 130) {
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unsigned char len = length;
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m_buffer.addData(&len, 1U);
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m_buffer.addData(buffer, len);
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}
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}
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unsigned int CFCSNetwork::read(unsigned char* data)
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{
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assert(data != NULL);
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if (m_buffer.isEmpty())
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return 0U;
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unsigned char len = 0U;
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m_buffer.getData(&len, 1U);
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// Pass pings up to the gateway to reset the lost timer.
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if (len != 130U) {
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m_buffer.getData(data, len);
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::memset(data + 0U, ' ', 14U);
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::memcpy(data + 0U, "YSFP", 4U);
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::memcpy(data + 4U, m_print.c_str(), 8U);
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return 14U;
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}
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m_resetTimer.start();
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unsigned char buffer[130U];
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m_buffer.getData(buffer, len);
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::memset(data + 0U, ' ', 35U);
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::memcpy(data + 0U, "YSFD", 4U);
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::memcpy(data + 35U, buffer, 120U);
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// Put the reflector name as the via callsign.
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::memcpy(data + 4U, m_print.c_str(), 9U);
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data[34U] = m_n;
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m_n += 2U;
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return 155U;
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}
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void CFCSNetwork::close()
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{
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m_socket.close();
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LogMessage("Closing FCS network connection");
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}
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void CFCSNetwork::writeInfo()
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{
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if (m_state != FCS_LINKED)
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return;
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if (m_debug)
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CUtils::dump(1U, "FCS Network Data Sent", m_info, 100U);
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m_socket.write(m_info, 100U, m_address, FCS_PORT);
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}
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void CFCSNetwork::writePing()
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{
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if (m_state == FCS_UNLINKED)
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return;
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if (m_debug)
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CUtils::dump(1U, "FCS Network Data Sent", m_ping, 25U);
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m_socket.write(m_ping, 25U, m_address, FCS_PORT);
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}
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