85 lines
1.9 KiB
C++
85 lines
1.9 KiB
C++
/*
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* Copyright (C) 2009-2014,2016,2018,2020 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 "NXDNNetwork.h"
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#include <cstdio>
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#include <cassert>
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#include <cstring>
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CNXDNNetwork::CNXDNNetwork(unsigned short port) :
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m_socket(port),
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m_addr(),
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m_addrLen(0U)
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{
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}
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CNXDNNetwork::~CNXDNNetwork()
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{
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}
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bool CNXDNNetwork::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 CNXDNNetwork::write(const unsigned char* data, unsigned int length)
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{
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if (m_addrLen == 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_addr, m_addrLen);
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}
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unsigned int CNXDNNetwork::read(unsigned char* data, unsigned int len)
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{
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sockaddr_storage addr;
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unsigned int addrlen;
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int length = m_socket.read(data, len, addr, addrlen);
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if (length <= 0)
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return 0U;
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m_addr = addr;
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m_addrLen = addrlen;
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if (::memcmp(data, "NXDNP", 5U) == 0 && length == 17) { // A poll
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write(data, length);
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return 0U;
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} else if (::memcmp(data, "NXDND", 5U) == 0 && length == 43) {
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return 43U;
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} else {
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return 0U;
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}
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}
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void CNXDNNetwork::end()
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{
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m_addrLen = 0U;
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}
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void CNXDNNetwork::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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