Add DMR2M17

DSTAR2YSF/DSTARNetwork.cpp

@@ -0,0 +1,168 @@
+/*
+ *   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 "DSTARNetwork.h"
+#include "Utils.h"
+#include "Log.h"
+
+#include <cstdio>
+#include <cassert>
+#include <cstring>
+
+CDSTARNetwork::CDSTARNetwork(const std::string& localAddress, unsigned int localPort, const std::string& gatewayAddress, unsigned int gatewayPort, const std::string& callsign, bool debug) :
+m_callsign(callsign),
+m_address(),
+m_port(gatewayPort),
+m_socket(localAddress, localPort),
+m_debug(debug)
+{
+	m_callsign.resize(10U, ' ');
+	m_address = CUDPSocket::lookup(gatewayAddress);
+}
+
+CDSTARNetwork::~CDSTARNetwork()
+{
+}
+
+bool CDSTARNetwork::open()
+{
+	LogInfo("Opening DSTAR network connection");
+
+	return m_socket.open();
+}
+
+bool CDSTARNetwork::writeHeader(const unsigned char* header, unsigned int length)
+{
+	assert(header != NULL);
+
+	unsigned char buffer[50U];
+
+	buffer[0] = 'D';
+	buffer[1] = 'S';
+	buffer[2] = 'R';
+	buffer[3] = 'P';
+	buffer[4] = 0x20U;
+
+	// Create a random id for this transmission
+	//std::uniform_int_distribution<uint16_t> dist(0x0001, 0xfffe);
+	//m_outId = 0x1234;//dist(m_random);
+	m_outId = rand() % 65536; 
+
+	buffer[5] = m_outId / 256U;	// Unique session id
+	buffer[6] = m_outId % 256U;
+
+	buffer[7] = 0U;
+
+	::memcpy(buffer + 8U, header, length);
+
+	m_outSeq = 0U;
+
+	
+
+	for (unsigned int i = 0U; i < 2U; i++) {
+		bool ret = m_socket.write(buffer, 49U, m_address, m_port);
+		if (m_debug)
+			CUtils::dump(1U, "D-Star Network Header Sent", buffer, 49U);
+		
+		if (!ret)
+			return false;
+	}
+
+	return true;
+}
+
+bool CDSTARNetwork::writeData(const unsigned char* data, unsigned int length, bool end)
+{
+	assert(data != NULL);
+
+	unsigned char buffer[30U];
+
+	buffer[0] = 'D';
+	buffer[1] = 'S';
+	buffer[2] = 'R';
+	buffer[3] = 'P';
+	buffer[4] = 0x21U;
+	buffer[5] = m_outId / 256U;	// Unique session id
+	buffer[6] = m_outId % 256U;
+
+	// If this is a data sync, reset the sequence to zero
+	if (data[9] == 0x55 && data[10] == 0x2D && data[11] == 0x16)
+		m_outSeq = 0U;
+
+	buffer[7] = m_outSeq;
+	if (end)
+		buffer[7] |= 0x40U;			// End of data marker
+
+	buffer[8] = 0;
+
+	m_outSeq++;
+	if (m_outSeq > 0x14U)
+		m_outSeq = 0U;
+
+	::memcpy(buffer + 9U, data, length);
+
+	if (m_debug)
+		CUtils::dump(1U, "D-Star Network Data Sent", buffer, length + 9U);
+
+	return m_socket.write(buffer, length + 9U, m_address, m_port);
+}
+
+bool CDSTARNetwork::writePoll()
+{
+	unsigned char data[15U];
+
+	data[0U] = 0xF0U;
+
+	for (unsigned int i = 0U; i < 10U; i++)
+		data[i + 1U] = m_callsign.at(i);
+
+	if (m_debug)
+		CUtils::dump(1U, "DSTAR Network Poll Sent", data, 11U);
+
+	return m_socket.write(data, 11U, m_address, m_port);
+}
+
+unsigned int CDSTARNetwork::readData(unsigned char* data, unsigned int length)
+{
+	assert(data != NULL);
+	assert(length > 0U);
+
+	in_addr address;
+	unsigned int port;
+	int len = m_socket.read(data, length, address, port);
+	if (len <= 0)
+		return 0U;
+
+	// Check if the data is for us
+	if (m_address.s_addr != address.s_addr || port != m_port) {
+		LogMessage("DSTAR packet received from an invalid source, %08X != %08X and/or %u != %u", m_address.s_addr, address.s_addr, m_port, port);
+		return 0U;
+	}
+
+	if (m_debug)
+		CUtils::dump(1U, "DSTAR Network Data Received", data, len);
+
+	return len;
+}
+
+void CDSTARNetwork::close()
+{
+	m_socket.close();
+
+	LogInfo("Closing DSTAR network connection");
+}