104 lines
2.2 KiB
C++
104 lines
2.2 KiB
C++
/*
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* Copyright (C) 2009-2014,2016,2018 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 "Network.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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CNetwork::CNetwork(unsigned int port) :
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m_socket(port),
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m_address(),
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m_port(0U),
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m_buffer(1000U, "NXDN Network")
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{
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}
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CNetwork::~CNetwork()
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{
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}
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bool CNetwork::open()
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{
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::fprintf(stdout, "Opening NXDN network connection\n");
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return m_socket.open();
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}
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bool CNetwork::write(const unsigned char* data, unsigned int length)
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{
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if (m_port == 0U)
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return true;
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assert(data != NULL);
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return m_socket.write(data, length, m_address, m_port);
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}
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void CNetwork::clock(unsigned int ms)
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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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m_address.s_addr = address.s_addr;
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m_port = port;
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if (::memcmp(buffer, "NXDNP", 5U) == 0) { // A poll
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write(buffer, length);
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} else if (::memcmp(buffer, "NXDND", 5U) == 0) {
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unsigned char l = length;
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m_buffer.addData(&l, 1U);
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m_buffer.addData(buffer, length);
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}
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}
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unsigned int CNetwork::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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m_buffer.getData(data, len);
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return len;
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}
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void CNetwork::end()
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{
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m_port = 0U;
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}
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void CNetwork::close()
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{
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m_socket.close();
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::fprintf(stdout, "Closing NXDN network connection\n");
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}
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