134 lines
2.8 KiB
C++
134 lines
2.8 KiB
C++
|
/*
|
||
|
|
* Copyright (C) 2009-2014,2016,2019,2020 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 "M17Network.h"
|
||
|
|
#include "M17Defines.h"
|
||
|
|
#include "Defines.h"
|
||
|
|
#include "Utils.h"
|
||
|
|
#include "Log.h"
|
||
|
|
|
||
|
|
#include <cstdio>
|
||
|
|
#include <cassert>
|
||
|
|
#include <cstring>
|
||
|
|
|
||
|
|
const unsigned int BUFFER_LENGTH = 200U;
|
||
|
|
|
||
|
|
CM17Network::CM17Network(unsigned int localPort, const std::string& gatewayAddress, unsigned int gatewayPort, bool debug) :
|
||
|
|
m_socket(localPort),
|
||
|
|
m_addr(),
|
||
|
|
m_addrLen(0U),
|
||
|
|
m_debug(debug),
|
||
|
|
m_enabled(false),
|
||
|
|
m_buffer(1000U, "M17 Network")
|
||
|
|
{
|
||
|
|
if (CUDPSocket::lookup(gatewayAddress, gatewayPort, m_addr, m_addrLen) != 0)
|
||
|
|
m_addrLen = 0U;
|
||
|
|
}
|
||
|
|
|
||
|
|
CM17Network::~CM17Network()
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
bool CM17Network::open()
|
||
|
|
{
|
||
|
|
if (m_addrLen == 0U) {
|
||
|
|
LogError("Unable to resolve the address of the M17 Gateway");
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
LogMessage("Opening M17 network connection");
|
||
|
|
|
||
|
|
return m_socket.open(m_addr);
|
||
|
|
}
|
||
|
|
|
||
|
|
bool CM17Network::write(const unsigned char* data)
|
||
|
|
{
|
||
|
|
assert(data != NULL);
|
||
|
|
|
||
|
|
unsigned char buffer[100U];
|
||
|
|
|
||
|
|
buffer[0U] = 'M';
|
||
|
|
buffer[1U] = '1';
|
||
|
|
buffer[2U] = '7';
|
||
|
|
|
||
|
|
if (m_debug)
|
||
|
|
CUtils::dump(1U, "M17 data transmitted", buffer, 36U);
|
||
|
|
|
||
|
|
return m_socket.write(buffer, 36U, m_addr, m_addrLen);
|
||
|
|
}
|
||
|
|
|
||
|
|
void CM17Network::clock(unsigned int ms)
|
||
|
|
{
|
||
|
|
unsigned char buffer[BUFFER_LENGTH];
|
||
|
|
|
||
|
|
sockaddr_storage address;
|
||
|
|
unsigned int addrLen;
|
||
|
|
int length = m_socket.read(buffer, BUFFER_LENGTH, address, addrLen);
|
||
|
|
if (length <= 0)
|
||
|
|
return;
|
||
|
|
|
||
|
|
if (!CUDPSocket::match(m_addr, address)) {
|
||
|
|
LogMessage("M17, packet received from an invalid source");
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!m_enabled)
|
||
|
|
return;
|
||
|
|
|
||
|
|
if (m_debug)
|
||
|
|
CUtils::dump(1U, "M17 Network Data Received", buffer, length);
|
||
|
|
|
||
|
|
if (::memcmp(buffer + 0U, "M17", 3U) != 0)
|
||
|
|
return;
|
||
|
|
|
||
|
|
unsigned char c = length;
|
||
|
|
m_buffer.addData(&c, 1U);
|
||
|
|
|
||
|
|
m_buffer.addData(buffer, length);
|
||
|
|
}
|
||
|
|
|
||
|
|
bool CM17Network::read(unsigned char* data)
|
||
|
|
{
|
||
|
|
assert(data != NULL);
|
||
|
|
|
||
|
|
if (m_buffer.isEmpty())
|
||
|
|
return false;
|
||
|
|
|
||
|
|
unsigned char c = 0U;
|
||
|
|
m_buffer.getData(&c, 1U);
|
||
|
|
|
||
|
|
m_buffer.getData(data, c);
|
||
|
|
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
void CM17Network::close()
|
||
|
|
{
|
||
|
|
m_socket.close();
|
||
|
|
|
||
|
|
LogMessage("Closing M17 network connection");
|
||
|
|
}
|
||
|
|
|
||
|
|
void CM17Network::enable(bool enabled)
|
||
|
|
{
|
||
|
|
if (!enabled && m_enabled)
|
||
|
|
m_buffer.clear();
|
||
|
|
|
||
|
|
m_enabled = enabled;
|
||
|
|
}
|