Initial version.

YSFReflector/Network.cpp

@@ -0,0 +1,150 @@
+/*
+ *   Copyright (C) 2009-2014,2016 by Jonathan Naylor G4KLX
+ *
+ *   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 "YSFDefines.h"
+#include "Network.h"
+#include "Utils.h"
+
+#include <cstdio>
+#include <cassert>
+#include <cstring>
+
+const unsigned int BUFFER_LENGTH = 200U;
+
+CNetwork::CNetwork(unsigned int port, bool debug) :
+m_socket(port),
+m_address(),
+m_port(0U),
+m_callsign(),
+m_debug(debug),
+m_buffer(1000U, "YSF Network")
+{
+}
+
+CNetwork::~CNetwork()
+{
+}
+
+bool CNetwork::open()
+{
+	::fprintf(stdout, "Opening YSF network connection\n");
+
+	return m_socket.open();
+}
+
+bool CNetwork::writeData(const unsigned char* data, const in_addr& address, unsigned int port)
+{
+	assert(data != NULL);
+
+	if (m_debug)
+		CUtils::dump(1U, "YSF Network Data Sent", data, 155U);
+
+	return m_socket.write(data, 155U, address, port);
+}
+
+bool CNetwork::writePoll(const in_addr& address, unsigned int port)
+{
+	unsigned char buffer[20U];
+
+	buffer[0] = 'Y';
+	buffer[1] = 'S';
+	buffer[2] = 'F';
+	buffer[3] = 'P';
+
+	buffer[4U]  = 'R';
+	buffer[5U]  = 'E';
+	buffer[6U]  = 'F';
+	buffer[7U]  = 'L';
+	buffer[8U]  = 'E';
+	buffer[9U]  = 'C';
+	buffer[10U] = 'T';
+	buffer[11U] = 'O';
+	buffer[12U] = 'R';
+	buffer[13U] = ' ';
+
+	if (m_debug)
+		CUtils::dump(1U, "YSF Network Poll Sent", buffer, 14U);
+
+	return m_socket.write(buffer, 14U, address, port);
+}
+
+void CNetwork::clock(unsigned int ms)
+{
+	unsigned char buffer[BUFFER_LENGTH];
+
+	in_addr address;
+	unsigned int port;
+	int length = m_socket.read(buffer, BUFFER_LENGTH, address, port);
+	if (length <= 0)
+		return;
+
+	// Handle incoming polls
+	if (::memcmp(buffer, "YSFP", 4U) == 0) {
+		m_callsign = std::string((char*)(buffer + 4U), YSF_CALLSIGN_LENGTH);
+		m_address  = address;
+		m_port     = port;
+		return;
+	}
+
+	// Invalid packet type?
+	if (::memcmp(buffer, "YSFD", 4U) != 0)
+		return;
+
+	// Simulate a poll with the data
+	m_callsign = std::string((char*)(buffer + 4U), YSF_CALLSIGN_LENGTH);
+	m_address  = address;
+	m_port     = port;
+
+	if (m_debug)
+		CUtils::dump(1U, "YSF Network Data Received", buffer, length);
+
+	m_buffer.addData(buffer, 155U);
+}
+
+unsigned int CNetwork::readData(unsigned char* data)
+{
+	assert(data != NULL);
+
+	if (m_buffer.isEmpty())
+		return 0U;
+
+	m_buffer.getData(data, 155U);
+
+	return 155U;
+}
+
+bool CNetwork::readPoll(std::string& callsign, in_addr& address, unsigned int& port)
+{
+	if (m_port == 0U)
+		return false;
+
+	callsign = m_callsign;
+	address  = m_address;
+	port     = m_port;
+
+	m_port = 0U;
+
+	return true;
+}
+
+void CNetwork::close()
+{
+	m_socket.close();
+
+	::fprintf(stdout, "Closing YSF network connection\n");
+}