More sane modem port protocol handling.

UDPController.cpp

@@ -0,0 +1,79 @@
+/*
+ *   Copyright (C) 2021 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 "UDPController.h"
+#include "Log.h"
+
+#include <cstring>
+#include <cassert>
+
+const unsigned int BUFFER_LENGTH = 600U;
+
+CUDPController::CUDPController(const std::string& modemAddress, unsigned int modemPort, unsigned int localPort) :
+m_socket(localPort),
+m_addr(),
+m_addrLen(0U),
+m_buffer(NULL),
+m_length(0U),
+m_offset(0U)
+{
+	assert(!modemAddress.empty());
+	assert(modemPort > 0U);
+	assert(localPort > 0U);
+
+	if (CUDPSocket::lookup(modemAddress, modemPort, m_addr, m_addrLen) != 0)
+		m_addrLen = 0U;
+
+	m_buffer = new unsigned char[BUFFER_LENGTH];
+}
+
+CUDPController::~CUDPController()
+{
+	delete[] m_buffer;
+}
+
+bool CUDPController::open()
+{
+	if (m_addrLen == 0U) {
+		LogError("Unable to resolve the address of the modem");
+		return false;
+	}
+
+	return m_socket.open(m_addr);
+}
+
+int CUDPController::read(unsigned char* buffer, unsigned int length)
+{
+	assert(buffer != NULL);
+	assert(length > 0U);
+
+	return 0;
+}
+
+int CUDPController::write(const unsigned char* buffer, unsigned int length)
+{
+	assert(buffer != NULL);
+	assert(length > 0U);
+
+	return m_socket.write(buffer, length, m_addr, m_addrLen) ? int(length) : -1;
+}
+
+void CUDPController::close()
+{
+	m_socket.close();
+}