MMDVMHost-Private/P25Network.cpp
2020-09-06 12:54:08 +01:00

440 lines
11 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 "P25Network.h"
#include "P25Defines.h"
#include "Defines.h"
#include "Utils.h"
#include "Log.h"
#include <cstdio>
#include <cassert>
#include <cstring>
const unsigned char REC62[] = {
0x62U, 0x02U, 0x02U, 0x0CU, 0x0BU, 0x12U, 0x64U, 0x00U, 0x00U, 0x80U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U,
0x00U, 0x00U, 0x00U, 0x00U, 0x00U};
const unsigned char REC63[] = {
0x63U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x02U};
const unsigned char REC64[] = {
0x64U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x02U};
const unsigned char REC65[] = {
0x65U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x02U};
const unsigned char REC66[] = {
0x66U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x02U};
const unsigned char REC67[] = {
0x67U, 0xF0U, 0x9DU, 0x6AU, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x02U};
const unsigned char REC68[] = {
0x68U, 0x19U, 0xD4U, 0x26U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x02U};
const unsigned char REC69[] = {
0x69U, 0xE0U, 0xEBU, 0x7BU, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x02U};
const unsigned char REC6A[] = {
0x6AU, 0x00U, 0x00U, 0x02U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U};
const unsigned char REC6B[] = {
0x6BU, 0x02U, 0x02U, 0x0CU, 0x0BU, 0x12U, 0x64U, 0x00U, 0x00U, 0x80U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U,
0x00U, 0x00U, 0x00U, 0x00U, 0x00U};
const unsigned char REC6C[] = {
0x6CU, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x02U};
const unsigned char REC6D[] = {
0x6DU, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x02U};
const unsigned char REC6E[] = {
0x6EU, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x02U};
const unsigned char REC6F[] = {
0x6FU, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x02U};
const unsigned char REC70[] = {
0x70U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x02U};
const unsigned char REC71[] = {
0x71U, 0xACU, 0xB8U, 0xA4U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x02U};
const unsigned char REC72[] = {
0x72U, 0x9BU, 0xDCU, 0x75U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x02U};
const unsigned char REC73[] = {
0x73U, 0x00U, 0x00U, 0x02U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U};
const unsigned char REC80[] = {
0x80U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U};
const unsigned int BUFFER_LENGTH = 100U;
CP25Network::CP25Network(const std::string& gatewayAddress, unsigned int gatewayPort, unsigned int localPort, bool debug) :
m_socket(localPort),
m_addr(),
m_addrLen(0U),
m_debug(debug),
m_enabled(false),
m_buffer(1000U, "P25 Network"),
m_audio()
{
if (CUDPSocket::lookup(gatewayAddress, gatewayPort, m_addr, m_addrLen) != 0)
m_addrLen = 0U;
}
CP25Network::~CP25Network()
{
}
bool CP25Network::open()
{
if (m_addrLen == 0U) {
LogError("Unable to resolve the address of the P25 Gateway");
return false;
}
LogMessage("Opening P25 network connection");
return m_socket.open(m_addr);
}
bool CP25Network::writeLDU1(const unsigned char* ldu1, const CP25Data& control, const CP25LowSpeedData& lsd, bool end)
{
assert(ldu1 != NULL);
unsigned char buffer[22U];
// The '62' record
::memcpy(buffer, REC62, 22U);
m_audio.decode(ldu1, buffer + 10U, 0U);
if (m_debug)
CUtils::dump(1U, "P25 Network LDU1 Sent", buffer, 22U);
bool ret = m_socket.write(buffer, 22U, m_addr, m_addrLen);
if (!ret)
return false;
// The '63' record
::memcpy(buffer, REC63, 14U);
m_audio.decode(ldu1, buffer + 1U, 1U);
if (m_debug)
CUtils::dump(1U, "P25 Network LDU1 Sent", buffer, 14U);
ret = m_socket.write(buffer, 14U, m_addr, m_addrLen);
if (!ret)
return false;
// The '64' record
::memcpy(buffer, REC64, 17U);
buffer[1U] = control.getLCF();
buffer[2U] = control.getMFId();
m_audio.decode(ldu1, buffer + 5U, 2U);
if (m_debug)
CUtils::dump(1U, "P25 Network LDU1 Sent", buffer, 17U);
ret = m_socket.write(buffer, 17U, m_addr, m_addrLen);
if (!ret)
return false;
// The '65' record
::memcpy(buffer, REC65, 17U);
unsigned int id = control.getDstId();
buffer[1U] = (id >> 16) & 0xFFU;
buffer[2U] = (id >> 8) & 0xFFU;
buffer[3U] = (id >> 0) & 0xFFU;
m_audio.decode(ldu1, buffer + 5U, 3U);
if (m_debug)
CUtils::dump(1U, "P25 Network LDU1 Sent", buffer, 17U);
ret = m_socket.write(buffer, 17U, m_addr, m_addrLen);
if (!ret)
return false;
// The '66' record
::memcpy(buffer, REC66, 17U);
id = control.getSrcId();
buffer[1U] = (id >> 16) & 0xFFU;
buffer[2U] = (id >> 8) & 0xFFU;
buffer[3U] = (id >> 0) & 0xFFU;
m_audio.decode(ldu1, buffer + 5U, 4U);
if (m_debug)
CUtils::dump(1U, "P25 Network LDU1 Sent", buffer, 17U);
ret = m_socket.write(buffer, 17U, m_addr, m_addrLen);
if (!ret)
return false;
// The '67' record
::memcpy(buffer, REC67, 17U);
m_audio.decode(ldu1, buffer + 5U, 5U);
if (m_debug)
CUtils::dump(1U, "P25 Network LDU1 Sent", buffer, 17U);
ret = m_socket.write(buffer, 17U, m_addr, m_addrLen);
if (!ret)
return false;
// The '68' record
::memcpy(buffer, REC68, 17U);
m_audio.decode(ldu1, buffer + 5U, 6U);
if (m_debug)
CUtils::dump(1U, "P25 Network LDU1 Sent", buffer, 17U);
ret = m_socket.write(buffer, 17U, m_addr, m_addrLen);
if (!ret)
return false;
// The '69' record
::memcpy(buffer, REC69, 17U);
m_audio.decode(ldu1, buffer + 5U, 7U);
if (m_debug)
CUtils::dump(1U, "P25 Network LDU1 Sent", buffer, 17U);
ret = m_socket.write(buffer, 17U, m_addr, m_addrLen);
if (!ret)
return false;
// The '6A' record
::memcpy(buffer, REC6A, 16U);
buffer[1U] = lsd.getLSD1();
buffer[2U] = lsd.getLSD2();
m_audio.decode(ldu1, buffer + 4U, 8U);
if (m_debug)
CUtils::dump(1U, "P25 Network LDU1 Sent", buffer, 16U);
ret = m_socket.write(buffer, 16U, m_addr, m_addrLen);
if (!ret)
return false;
if (end) {
if (m_debug)
CUtils::dump(1U, "P25 Network END Sent", REC80, 17U);
ret = m_socket.write(REC80, 17U, m_addr, m_addrLen);
if (!ret)
return false;
}
return true;
}
bool CP25Network::writeLDU2(const unsigned char* ldu2, const CP25Data& control, const CP25LowSpeedData& lsd, bool end)
{
assert(ldu2 != NULL);
unsigned char buffer[22U];
// The '6B' record
::memcpy(buffer, REC6B, 22U);
m_audio.decode(ldu2, buffer + 10U, 0U);
if (m_debug)
CUtils::dump(1U, "P25 Network LDU2 Sent", buffer, 22U);
bool ret = m_socket.write(buffer, 22U, m_addr, m_addrLen);
if (!ret)
return false;
// The '6C' record
::memcpy(buffer, REC6C, 14U);
m_audio.decode(ldu2, buffer + 1U, 1U);
if (m_debug)
CUtils::dump(1U, "P25 Network LDU2 Sent", buffer, 14U);
ret = m_socket.write(buffer, 14U, m_addr, m_addrLen);
if (!ret)
return false;
unsigned char mi[P25_MI_LENGTH_BYTES];
control.getMI(mi);
// The '6D' record
::memcpy(buffer, REC6D, 17U);
buffer[1U] = mi[0U];
buffer[2U] = mi[1U];
buffer[3U] = mi[2U];
m_audio.decode(ldu2, buffer + 5U, 2U);
if (m_debug)
CUtils::dump(1U, "P25 Network LDU2 Sent", buffer, 17U);
ret = m_socket.write(buffer, 17U, m_addr, m_addrLen);
if (!ret)
return false;
// The '6E' record
::memcpy(buffer, REC6E, 17U);
buffer[1U] = mi[3U];
buffer[2U] = mi[4U];
buffer[3U] = mi[5U];
m_audio.decode(ldu2, buffer + 5U, 3U);
if (m_debug)
CUtils::dump(1U, "P25 Network LDU2 Sent", buffer, 17U);
ret = m_socket.write(buffer, 17U, m_addr, m_addrLen);
if (!ret)
return false;
// The '6F' record
::memcpy(buffer, REC6F, 17U);
buffer[1U] = mi[6U];
buffer[2U] = mi[7U];
buffer[3U] = mi[8U];
m_audio.decode(ldu2, buffer + 5U, 4U);
if (m_debug)
CUtils::dump(1U, "P25 Network LDU2 Sent", buffer, 17U);
ret = m_socket.write(buffer, 17U, m_addr, m_addrLen);
if (!ret)
return false;
// The '70' record
::memcpy(buffer, REC70, 17U);
buffer[1U] = control.getAlgId();
unsigned int id = control.getKId();
buffer[2U] = (id >> 8) & 0xFFU;
buffer[3U] = (id >> 0) & 0xFFU;
m_audio.decode(ldu2, buffer + 5U, 5U);
if (m_debug)
CUtils::dump(1U, "P25 Network LDU2 Sent", buffer, 17U);
ret = m_socket.write(buffer, 17U, m_addr, m_addrLen);
if (!ret)
return false;
// The '71' record
::memcpy(buffer, REC71, 17U);
m_audio.decode(ldu2, buffer + 5U, 6U);
if (m_debug)
CUtils::dump(1U, "P25 Network LDU2 Sent", buffer, 17U);
ret = m_socket.write(buffer, 17U, m_addr, m_addrLen);
if (!ret)
return false;
// The '72' record
::memcpy(buffer, REC72, 17U);
m_audio.decode(ldu2, buffer + 5U, 7U);
if (m_debug)
CUtils::dump(1U, "P25 Network LDU2 Sent", buffer, 17U);
ret = m_socket.write(buffer, 17U, m_addr, m_addrLen);
if (!ret)
return false;
// The '73' record
::memcpy(buffer, REC73, 16U);
buffer[1U] = lsd.getLSD1();
buffer[2U] = lsd.getLSD2();
m_audio.decode(ldu2, buffer + 4U, 8U);
if (m_debug)
CUtils::dump(1U, "P25 Network LDU2 Sent", buffer, 16U);
ret = m_socket.write(buffer, 16U, m_addr, m_addrLen);
if (!ret)
return false;
if (end) {
if (m_debug)
CUtils::dump(1U, "P25 Network END Sent", REC80, 17U);
ret = m_socket.write(REC80, 17U, m_addr, m_addrLen);
if (!ret)
return false;
}
return true;
}
void CP25Network::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("P25, packet received from an invalid source");
return;
}
if (!m_enabled)
return;
if (m_debug)
CUtils::dump(1U, "P25 Network Data Received", buffer, length);
unsigned char c = length;
m_buffer.addData(&c, 1U);
m_buffer.addData(buffer, length);
}
unsigned int CP25Network::read(unsigned char* data, unsigned int length)
{
assert(data != NULL);
if (m_buffer.isEmpty())
return 0U;
unsigned char c = 0U;
m_buffer.getData(&c, 1U);
assert(c <= length);
m_buffer.getData(data, c);
return c;
}
void CP25Network::close()
{
m_socket.close();
LogMessage("Closing P25 network connection");
}
void CP25Network::enable(bool enabled)
{
if (!enabled && m_enabled)
m_buffer.clear();
m_enabled = enabled;
}