120 lines
2.8 KiB
C++
120 lines
2.8 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 "NXDNNetwork.h"
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#include "Utils.h"
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#include "Log.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 int port, bool debug) :
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m_socket(port),
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m_debug(debug)
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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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LogInfo("Opening NXDN network connection");
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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, const in_addr& address, unsigned int port)
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{
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assert(data != NULL);
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assert(length > 0U);
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assert(port > 0U);
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if (m_debug)
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CUtils::dump(1U, "NXDN Network Data Sent", data, length);
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return m_socket.write(data, length, address, port);
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}
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bool CNXDNNetwork::write(const unsigned char* data, unsigned int length, unsigned short srcId, unsigned short dstId, bool grp, const in_addr& address, unsigned int port)
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{
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assert(data != NULL);
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assert(length > 0U);
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assert(port > 0U);
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unsigned char buffer[50U];
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buffer[0U] = 'N';
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buffer[1U] = 'X';
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buffer[2U] = 'D';
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buffer[3U] = 'N';
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buffer[4U] = 'D';
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buffer[5U] = (srcId >> 8) & 0xFFU;
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buffer[6U] = (srcId >> 0) & 0xFFU;
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buffer[7U] = (dstId >> 8) & 0xFFU;
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buffer[8U] = (dstId >> 0) & 0xFFU;
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buffer[9U] = 0x00U;
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buffer[9U] |= grp ? 0x01U : 0x00U;
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if (data[0U] == 0x81U || data[0U] == 0x83U) {
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buffer[9U] |= data[5U] == 0x01U ? 0x04U : 0x00U;
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buffer[9U] |= data[5U] == 0x08U ? 0x08U : 0x00U;
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}
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::memcpy(buffer + 10U, data, 33U);
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if (m_debug)
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CUtils::dump(1U, "NXDN Network Data Sent", buffer, 43U);
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return m_socket.write(buffer, 43U, address, port);
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}
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unsigned int CNXDNNetwork::read(unsigned char* data, unsigned int length, in_addr& address, unsigned int& port)
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{
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assert(data != NULL);
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assert(length > 0U);
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int len = m_socket.read(data, length, address, port);
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if (len <= 0)
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return 0U;
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// Invalid packet type?
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if (::memcmp(data, "NXDN", 4U) != 0)
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return 0U;
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if (len != 17 && len != 43)
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return 0U;
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if (m_debug)
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CUtils::dump(1U, "NXDN Network Data Received", data, len);
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return len;
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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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LogInfo("Closing NXDN network connection");
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}
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