mirror of
https://github.com/ShaYmez/NXDNClients.git
synced 2024-11-19 06:11:45 -05:00
127 lines
3.2 KiB
C++
127 lines
3.2 KiB
C++
/*
|
|
* Copyright (C) 2009-2014,2016,2018,2020 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 "NXDNNetwork.h"
|
|
#include "Utils.h"
|
|
#include "Log.h"
|
|
|
|
#include <cstdio>
|
|
#include <cassert>
|
|
#include <cstring>
|
|
|
|
CNXDNNetwork::CNXDNNetwork(unsigned int port, bool debug) :
|
|
m_socket(port),
|
|
m_debug(debug)
|
|
{
|
|
}
|
|
|
|
CNXDNNetwork::~CNXDNNetwork()
|
|
{
|
|
}
|
|
|
|
bool CNXDNNetwork::open()
|
|
{
|
|
LogInfo("Opening NXDN network connection");
|
|
|
|
return m_socket.open();
|
|
}
|
|
|
|
bool CNXDNNetwork::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, "NXDN Network Data Sent", data, length);
|
|
|
|
return m_socket.write(data, length, addr, addrLen);
|
|
}
|
|
|
|
bool CNXDNNetwork::write(const unsigned char* data, unsigned int length, unsigned short srcId, unsigned short dstId, bool grp, const sockaddr_storage& addr, unsigned int addrLen)
|
|
{
|
|
assert(data != NULL);
|
|
assert(length > 0U);
|
|
|
|
unsigned char buffer[50U];
|
|
|
|
buffer[0U] = 'N';
|
|
buffer[1U] = 'X';
|
|
buffer[2U] = 'D';
|
|
buffer[3U] = 'N';
|
|
buffer[4U] = 'D';
|
|
|
|
buffer[5U] = (srcId >> 8) & 0xFFU;
|
|
buffer[6U] = (srcId >> 0) & 0xFFU;
|
|
|
|
buffer[7U] = (dstId >> 8) & 0xFFU;
|
|
buffer[8U] = (dstId >> 0) & 0xFFU;
|
|
|
|
buffer[9U] = 0x00U;
|
|
buffer[9U] |= grp ? 0x01U : 0x00U;
|
|
|
|
if (data[0U] == 0x81U || data[0U] == 0x83U) {
|
|
// This is a voice header or trailer.
|
|
buffer[9U] |= data[5U] == 0x01U ? 0x04U : 0x00U;
|
|
buffer[9U] |= data[5U] == 0x08U ? 0x08U : 0x00U;
|
|
} else if ((data[0U] & 0xF0U) == 0x90U) {
|
|
// This if data.
|
|
buffer[9U] |= 0x02U;
|
|
if (data[0U] == 0x90U || data[0U] == 0x92U || data[0U] == 0x9CU || data[0U] == 0x9EU) {
|
|
// This is data header or trailer.
|
|
buffer[9U] |= data[2U] == 0x09U ? 0x04U : 0x00U;
|
|
buffer[9U] |= data[2U] == 0x08U ? 0x08U : 0x00U;
|
|
}
|
|
}
|
|
|
|
::memcpy(buffer + 10U, data, 33U);
|
|
|
|
if (m_debug)
|
|
CUtils::dump(1U, "NXDN Network Data Sent", buffer, 43U);
|
|
|
|
return m_socket.write(buffer, 43U, addr, addrLen);
|
|
}
|
|
|
|
unsigned int CNXDNNetwork::read(unsigned char* data, unsigned int length, sockaddr_storage& addr, unsigned int& addrLen)
|
|
{
|
|
assert(data != NULL);
|
|
assert(length > 0U);
|
|
|
|
int len = m_socket.read(data, length, addr, addrLen);
|
|
if (len <= 0)
|
|
return 0U;
|
|
|
|
// Invalid packet type?
|
|
if (::memcmp(data, "NXDN", 4U) != 0)
|
|
return 0U;
|
|
|
|
if (len != 17 && len != 43)
|
|
return 0U;
|
|
|
|
if (m_debug)
|
|
CUtils::dump(1U, "NXDN Network Data Received", data, len);
|
|
|
|
return len;
|
|
}
|
|
|
|
void CNXDNNetwork::close()
|
|
{
|
|
m_socket.close();
|
|
|
|
LogInfo("Closing NXDN network connection");
|
|
}
|