P25Clients/P25Parrot/Network.cpp

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/*
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* Copyright (C) 2009-2014,2016,2018,2020 by Jonathan Naylor G4KLX
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*
* 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 "Network.h"
#include <cstdio>
#include <cassert>
#include <cstring>
const unsigned int BUFFER_LENGTH = 200U;
CNetwork::CNetwork(unsigned short port) :
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m_socket(port),
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m_addr(),
m_addrLen(0U)
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{
}
CNetwork::~CNetwork()
{
}
bool CNetwork::open()
{
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::fprintf(stdout, "Opening P25 network connection\n");
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return m_socket.open();
}
bool CNetwork::write(const unsigned char* data, unsigned int length)
{
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if (m_addrLen == 0U)
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return true;
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 CNetwork::read(unsigned char* data)
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{
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sockaddr_storage addr;
unsigned int addrlen;
int length = m_socket.read(data, BUFFER_LENGTH, addr, addrlen);
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if (length <= 0)
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return 0U;
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m_addr = addr;
m_addrLen = addrlen;
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if (data[0U] == 0xF0U) { // A poll
write(data, length);
return 0U;
} else if (data[0U] == 0xF1U) { // An unlink
// Nothing to do
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return 0U;
} else {
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return length;
}
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}
void CNetwork::end()
{
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m_addrLen = 0U;
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}
void CNetwork::close()
{
m_socket.close();
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::fprintf(stdout, "Closing P25 network connection\n");
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}