P25Clients/P25Gateway/P25Network.cpp

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/*
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* Copyright (C) 2009-2014,2016,2020 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 "P25Network.h"
#include "Utils.h"
#include "Log.h"
#include <cstdio>
#include <cassert>
#include <cstring>
CP25Network::CP25Network(unsigned short port, const std::string& callsign, bool debug) :
m_callsign(callsign),
m_socket(),
m_port(port),
m_debug(debug)
{
assert(port > 0U);
m_callsign.resize(10U, ' ');
}
CP25Network::~CP25Network()
{
}
bool CP25Network::open()
{
LogInfo("Opening P25 network connection");
unsigned int index = 0U;
bool ret1 = m_socket.open(index, PF_INET, "", m_port);
if (ret1)
index++;
bool ret2 = m_socket.open(index, PF_INET6, "", m_port);
// We're OK as long as we have either IPv4 or IPv6 or both.
return ret1 || ret2;
}
bool CP25Network::write(const unsigned char* data, unsigned int length, const sockaddr_storage& addr, unsigned int addrLen)
{
assert(data != NULL);
assert(length > 0U);
if (m_debug)
CUtils::dump(1U, "P25 Network Data Sent", data, length);
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return m_socket.write(data, length, addr, addrLen);
}
bool CP25Network::poll(const sockaddr_storage& addr, unsigned int addrLen)
{
unsigned char data[15U];
data[0U] = 0xF0U;
for (unsigned int i = 0U; i < 10U; i++)
data[i + 1U] = m_callsign.at(i);
if (m_debug)
CUtils::dump(1U, "P25 Network Poll Sent", data, 11U);
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return m_socket.write(data, 11U, addr, addrLen);
}
bool CP25Network::unlink(const sockaddr_storage& addr, unsigned int addrLen)
{
unsigned char data[15U];
data[0U] = 0xF1U;
for (unsigned int i = 0U; i < 10U; i++)
data[i + 1U] = m_callsign.at(i);
if (m_debug)
CUtils::dump(1U, "P25 Network Unlink Sent", data, 11U);
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return m_socket.write(data, 11U, addr, addrLen);
}
unsigned int CP25Network::read(unsigned char* data, unsigned int length, sockaddr_storage& addr, unsigned int& addrLen)
{
assert(data != NULL);
assert(length > 0U);
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int len = m_socket.read(data, length, addr, addrLen);
if (len <= 0)
return 0U;
if (m_debug)
CUtils::dump(1U, "P25 Network Data Received", data, len);
return len;
}
void CP25Network::close()
{
m_socket.close();
LogInfo("Closing P25 network connection");
}