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https://github.com/g4klx/MMDVMHost
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Jonathan Naylor
402
YSFNetwork.cpp
402
YSFNetwork.cpp
@@ -1,201 +1,201 @@
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/*
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* Copyright (C) 2009-2014,2016,2019,2020 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 "YSFNetwork.h"
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#include "Defines.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 unsigned int BUFFER_LENGTH = 200U;
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CYSFNetwork::CYSFNetwork(const std::string& myAddress, unsigned int myPort, const std::string& gatewayAddress, unsigned int gatewayPort, const std::string& callsign, bool debug) :
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m_socket(myAddress, myPort),
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m_addr(),
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m_addrLen(0U),
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m_callsign(),
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m_debug(debug),
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m_enabled(false),
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m_buffer(1000U, "YSF Network"),
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m_pollTimer(1000U, 5U),
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m_tag(NULL)
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{
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m_callsign = callsign;
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m_callsign.resize(YSF_CALLSIGN_LENGTH, ' ');
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if (CUDPSocket::lookup(gatewayAddress, gatewayPort, m_addr, m_addrLen) != 0)
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m_addrLen = 0U;
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m_tag = new unsigned char[YSF_CALLSIGN_LENGTH];
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::memset(m_tag, ' ', YSF_CALLSIGN_LENGTH);
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}
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CYSFNetwork::~CYSFNetwork()
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{
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delete[] m_tag;
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}
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bool CYSFNetwork::open()
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{
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if (m_addrLen == 0U) {
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LogError("Unable to resolve the address of the YSF Gateway");
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return false;
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}
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LogMessage("Opening YSF network connection");
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m_pollTimer.start();
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return m_socket.open(m_addr);
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}
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bool CYSFNetwork::write(const unsigned char* src, const unsigned char* dest, const unsigned char* data, unsigned int count, bool end)
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{
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assert(data != NULL);
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unsigned char buffer[200U];
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buffer[0] = 'Y';
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buffer[1] = 'S';
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buffer[2] = 'F';
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buffer[3] = 'D';
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for (unsigned int i = 0U; i < YSF_CALLSIGN_LENGTH; i++)
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buffer[i + 4U] = m_callsign.at(i);
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if (src != NULL)
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::memcpy(buffer + 14U, src, YSF_CALLSIGN_LENGTH);
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else
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::memset(buffer + 14U, ' ', YSF_CALLSIGN_LENGTH);
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if (dest != NULL)
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::memcpy(buffer + 24U, dest, YSF_CALLSIGN_LENGTH);
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else
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::memset(buffer + 24U, ' ', YSF_CALLSIGN_LENGTH);
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buffer[34U] = end ? 0x01U : 0x00U;
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buffer[34U] |= (count & 0x7FU) << 1;
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::memcpy(buffer + 35U, data, YSF_FRAME_LENGTH_BYTES);
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if (m_debug)
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CUtils::dump(1U, "YSF Network Data Sent", buffer, 155U);
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return m_socket.write(buffer, 155U, m_addr, m_addrLen);
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}
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bool CYSFNetwork::writePoll()
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{
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unsigned char buffer[20U];
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buffer[0] = 'Y';
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buffer[1] = 'S';
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buffer[2] = 'F';
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buffer[3] = 'P';
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for (unsigned int i = 0U; i < YSF_CALLSIGN_LENGTH; i++)
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buffer[i + 4U] = m_callsign.at(i);
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if (m_debug)
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CUtils::dump(1U, "YSF Network Poll Sent", buffer, 14U);
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return m_socket.write(buffer, 14U, m_addr, m_addrLen);
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}
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void CYSFNetwork::clock(unsigned int ms)
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{
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m_pollTimer.clock(ms);
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if (m_pollTimer.hasExpired()) {
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writePoll();
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m_pollTimer.start();
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}
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unsigned char buffer[BUFFER_LENGTH];
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sockaddr_storage address;
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unsigned int addrLen;
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int length = m_socket.read(buffer, BUFFER_LENGTH, address, addrLen);
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if (length <= 0)
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return;
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if (!CUDPSocket::match(m_addr, address)) {
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LogMessage("YSF, packet received from an invalid source");
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return;
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}
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if (m_debug)
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CUtils::dump(1U, "YSF Network Data Received", buffer, length);
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// Invalid packet type?
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if (::memcmp(buffer, "YSFD", 4U) != 0)
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return;
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if (!m_enabled)
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return;
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if (::memcmp(m_tag, " ", YSF_CALLSIGN_LENGTH) == 0) {
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::memcpy(m_tag, buffer + 4U, YSF_CALLSIGN_LENGTH);
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} else {
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if (::memcmp(m_tag, buffer + 4U, YSF_CALLSIGN_LENGTH) != 0)
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return;
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}
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bool end = (buffer[34U] & 0x01U) == 0x01U;
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if (end)
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::memset(m_tag, ' ', YSF_CALLSIGN_LENGTH);
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m_buffer.addData(buffer, 155U);
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}
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unsigned int CYSFNetwork::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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m_buffer.getData(data, 155U);
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return 155U;
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}
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void CYSFNetwork::reset()
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{
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::memset(m_tag, ' ', YSF_CALLSIGN_LENGTH);
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}
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void CYSFNetwork::close()
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{
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m_socket.close();
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LogMessage("Closing YSF network connection");
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}
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void CYSFNetwork::enable(bool enabled)
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{
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if (enabled && !m_enabled)
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reset();
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else if (!enabled && m_enabled)
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m_buffer.clear();
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m_enabled = enabled;
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}
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/*
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* Copyright (C) 2009-2014,2016,2019,2020 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 "YSFNetwork.h"
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#include "Defines.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 unsigned int BUFFER_LENGTH = 200U;
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CYSFNetwork::CYSFNetwork(const std::string& myAddress, unsigned int myPort, const std::string& gatewayAddress, unsigned int gatewayPort, const std::string& callsign, bool debug) :
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m_socket(myAddress, myPort),
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m_addr(),
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m_addrLen(0U),
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m_callsign(),
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m_debug(debug),
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m_enabled(false),
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m_buffer(1000U, "YSF Network"),
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m_pollTimer(1000U, 5U),
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m_tag(NULL)
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{
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m_callsign = callsign;
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m_callsign.resize(YSF_CALLSIGN_LENGTH, ' ');
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if (CUDPSocket::lookup(gatewayAddress, gatewayPort, m_addr, m_addrLen) != 0)
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m_addrLen = 0U;
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m_tag = new unsigned char[YSF_CALLSIGN_LENGTH];
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::memset(m_tag, ' ', YSF_CALLSIGN_LENGTH);
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}
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CYSFNetwork::~CYSFNetwork()
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{
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delete[] m_tag;
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}
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bool CYSFNetwork::open()
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{
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if (m_addrLen == 0U) {
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LogError("Unable to resolve the address of the YSF Gateway");
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return false;
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}
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LogMessage("Opening YSF network connection");
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m_pollTimer.start();
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return m_socket.open(m_addr);
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}
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bool CYSFNetwork::write(const unsigned char* src, const unsigned char* dest, const unsigned char* data, unsigned int count, bool end)
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{
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assert(data != NULL);
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unsigned char buffer[200U];
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buffer[0] = 'Y';
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buffer[1] = 'S';
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buffer[2] = 'F';
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buffer[3] = 'D';
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for (unsigned int i = 0U; i < YSF_CALLSIGN_LENGTH; i++)
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buffer[i + 4U] = m_callsign.at(i);
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if (src != NULL)
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::memcpy(buffer + 14U, src, YSF_CALLSIGN_LENGTH);
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else
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::memset(buffer + 14U, ' ', YSF_CALLSIGN_LENGTH);
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if (dest != NULL)
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::memcpy(buffer + 24U, dest, YSF_CALLSIGN_LENGTH);
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else
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::memset(buffer + 24U, ' ', YSF_CALLSIGN_LENGTH);
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buffer[34U] = end ? 0x01U : 0x00U;
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buffer[34U] |= (count & 0x7FU) << 1;
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::memcpy(buffer + 35U, data, YSF_FRAME_LENGTH_BYTES);
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if (m_debug)
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CUtils::dump(1U, "YSF Network Data Sent", buffer, 155U);
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return m_socket.write(buffer, 155U, m_addr, m_addrLen);
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}
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bool CYSFNetwork::writePoll()
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{
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unsigned char buffer[20U];
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buffer[0] = 'Y';
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buffer[1] = 'S';
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buffer[2] = 'F';
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buffer[3] = 'P';
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for (unsigned int i = 0U; i < YSF_CALLSIGN_LENGTH; i++)
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buffer[i + 4U] = m_callsign.at(i);
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if (m_debug)
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CUtils::dump(1U, "YSF Network Poll Sent", buffer, 14U);
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return m_socket.write(buffer, 14U, m_addr, m_addrLen);
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}
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void CYSFNetwork::clock(unsigned int ms)
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{
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m_pollTimer.clock(ms);
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if (m_pollTimer.hasExpired()) {
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writePoll();
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m_pollTimer.start();
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}
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unsigned char buffer[BUFFER_LENGTH];
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sockaddr_storage address;
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unsigned int addrLen;
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int length = m_socket.read(buffer, BUFFER_LENGTH, address, addrLen);
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if (length <= 0)
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return;
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if (!CUDPSocket::match(m_addr, address)) {
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LogMessage("YSF, packet received from an invalid source");
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return;
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}
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if (m_debug)
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CUtils::dump(1U, "YSF Network Data Received", buffer, length);
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// Invalid packet type?
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if (::memcmp(buffer, "YSFD", 4U) != 0)
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return;
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if (!m_enabled)
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return;
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if (::memcmp(m_tag, " ", YSF_CALLSIGN_LENGTH) == 0) {
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::memcpy(m_tag, buffer + 4U, YSF_CALLSIGN_LENGTH);
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} else {
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if (::memcmp(m_tag, buffer + 4U, YSF_CALLSIGN_LENGTH) != 0)
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return;
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}
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bool end = (buffer[34U] & 0x01U) == 0x01U;
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if (end)
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::memset(m_tag, ' ', YSF_CALLSIGN_LENGTH);
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m_buffer.addData(buffer, 155U);
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}
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unsigned int CYSFNetwork::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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m_buffer.getData(data, 155U);
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return 155U;
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}
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void CYSFNetwork::reset()
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{
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::memset(m_tag, ' ', YSF_CALLSIGN_LENGTH);
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}
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void CYSFNetwork::close()
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{
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m_socket.close();
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LogMessage("Closing YSF network connection");
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}
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void CYSFNetwork::enable(bool enabled)
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{
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if (enabled && !m_enabled)
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reset();
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else if (!enabled && m_enabled)
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m_buffer.clear();
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m_enabled = enabled;
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}
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