453 lines
11 KiB
C++
453 lines
11 KiB
C++
/*
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* Copyright (C) 2009-2014,2016 by Jonathan Naylor G4KLX
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "P25Network.h"
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#include "P25Defines.h"
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#include "Defines.h"
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#include "Utils.h"
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#include "Log.h"
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#include <cstdio>
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#include <cassert>
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#include <cstring>
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const unsigned char STARTICW[] = {
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0x00U, 0x02U, 0x02U, 0x0CU, 0x0BU, 0x35U, 0xA3U, 0x00U, 0x00U, 0x00U};
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const unsigned char VHDR1[] = {
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0x60U, 0x02U, 0x02U, 0x0CU, 0x0BU, 0x35U, 0xA3U, 0x1AU, 0x65U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U,
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0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x08U, 0x00U, 0x00U, 0x00U, 0x00U, 0x02U, 0x2EU};
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const unsigned char VHDR2[] = {
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0x61U, 0x1DU, 0x35U, 0x34U, 0x37U, 0x0AU, 0x22U, 0x35U, 0x3EU, 0x00U, 0x10U, 0x02U, 0x11U, 0x28U, 0x1DU, 0x21U,
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0x03U, 0x1BU, 0x00U, 0x35U, 0x23U, 0x02U};
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const unsigned char REC62[] = {
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0x62U, 0x02U, 0x02U, 0x0CU, 0x0BU, 0x35U, 0xA3U, 0x1AU, 0x65U, 0x80U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U,
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0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x02U};
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const unsigned char REC6B[] = {
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0x6BU, 0x02U, 0x02U, 0x0CU, 0x0BU, 0x35U, 0xA3U, 0x1AU, 0x64U, 0x9CU, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x00U,
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0x00U, 0x00U, 0x00U, 0x00U, 0x00U, 0x02U };
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const unsigned int BUFFER_LENGTH = 100U;
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CP25Network::CP25Network(const std::string& gatewayAddress, unsigned int gatewayPort, unsigned int localPort, bool debug) :
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m_socket(localPort),
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m_address(),
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m_port(gatewayPort),
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m_debug(debug),
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m_enabled(false),
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m_buffer(1000U, "P25 Network"),
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m_audio()
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{
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m_address = CUDPSocket::lookup(gatewayAddress);
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}
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CP25Network::~CP25Network()
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{
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}
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bool CP25Network::open()
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{
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LogMessage("Opening P25 network connection");
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if (m_address.s_addr == INADDR_NONE)
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return false;
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return m_socket.open();
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}
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bool CP25Network::writeHeader()
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{
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if (m_debug)
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CUtils::dump(1U, "P25 Network ICW Sent", STARTICW, 10U);
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bool ret = m_socket.write(STARTICW, 10U, m_address, m_port);
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if (!ret)
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return false;
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if (m_debug)
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CUtils::dump(1U, "P25 Network VHDR1 Sent", VHDR1, 30U);
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ret = m_socket.write(VHDR1, 30U, m_address, m_port);
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if (!ret)
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return false;
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if (m_debug)
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CUtils::dump(1U, "P25 Network VHDR2 Sent", VHDR2, 22U);
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ret = m_socket.write(VHDR2, 22U, m_address, m_port);
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if (!ret)
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return false;
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return true;
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}
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bool CP25Network::writeLDU1(const unsigned char* ldu1, const CP25Data& control, const CP25LowSpeedData& lsd, bool end)
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{
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assert(ldu1 != NULL);
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unsigned char buffer[22U];
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// The '62' record
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::memcpy(buffer, REC62, 22U);
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m_audio.decode(ldu1, buffer + 10U, 0U);
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if (m_debug)
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CUtils::dump(1U, "P25 Network LDU1 Sent", buffer, 22U);
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bool ret = m_socket.write(buffer, 22U, m_address, m_port);
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if (!ret)
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return false;
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// The '63' record
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::memset(buffer, 0x00U, 14U);
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buffer[0U] = 0x63U;
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m_audio.decode(ldu1, buffer + 1U, 1U);
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buffer[13U] = 0x7AU;
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if (m_debug)
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CUtils::dump(1U, "P25 Network LDU1 Sent", buffer, 14U);
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ret = m_socket.write(buffer, 14U, m_address, m_port);
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if (!ret)
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return false;
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// The '64' record
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::memset(buffer, 0x00U, 17U);
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buffer[0U] = 0x64U;
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buffer[1U] = control.getLCF();
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buffer[2U] = control.getMFId();
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m_audio.decode(ldu1, buffer + 5U, 2U);
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buffer[16U] = 0x02U;
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if (m_debug)
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CUtils::dump(1U, "P25 Network LDU1 Sent", buffer, 17U);
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ret = m_socket.write(buffer, 17U, m_address, m_port);
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if (!ret)
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return false;
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// The '65' record
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::memset(buffer, 0x00U, 17U);
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buffer[0U] = 0x65U;
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unsigned int id = control.getDstId();
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buffer[1U] = (id >> 16) & 0xFFU;
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buffer[2U] = (id >> 8) & 0xFFU;
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buffer[3U] = (id >> 0) & 0xFFU;
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m_audio.decode(ldu1, buffer + 5U, 3U);
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buffer[16U] = 0x02U;
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if (m_debug)
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CUtils::dump(1U, "P25 Network LDU1 Sent", buffer, 17U);
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ret = m_socket.write(buffer, 17U, m_address, m_port);
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if (!ret)
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return false;
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// The '66' record
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::memset(buffer, 0x00U, 17U);
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buffer[0U] = 0x66U;
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id = control.getSrcId();
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buffer[1U] = (id >> 16) & 0xFFU;
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buffer[2U] = (id >> 8) & 0xFFU;
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buffer[3U] = (id >> 0) & 0xFFU;
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m_audio.decode(ldu1, buffer + 5U, 4U);
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buffer[16U] = 0x02U;
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if (m_debug)
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CUtils::dump(1U, "P25 Network LDU1 Sent", buffer, 17U);
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ret = m_socket.write(buffer, 17U, m_address, m_port);
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if (!ret)
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return false;
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// The '67' record
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::memset(buffer, 0x00U, 17U);
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buffer[0U] = 0x67U;
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buffer[1U] = 0x28U; // XXX ???
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buffer[2U] = 0xD6U; // XXX ???
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buffer[3U] = 0x58U; // XXX ???
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m_audio.decode(ldu1, buffer + 5U, 5U);
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buffer[16U] = 0x02U;
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if (m_debug)
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CUtils::dump(1U, "P25 Network LDU1 Sent", buffer, 17U);
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ret = m_socket.write(buffer, 17U, m_address, m_port);
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if (!ret)
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return false;
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// The '68' record
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::memset(buffer, 0x00U, 17U);
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buffer[0U] = 0x68U;
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buffer[1U] = 0xA0U; // XXX ???
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buffer[2U] = 0x81U; // XXX ???
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buffer[3U] = 0x9CU; // XXX ???
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m_audio.decode(ldu1, buffer + 5U, 6U);
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buffer[16U] = 0x02U;
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if (m_debug)
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CUtils::dump(1U, "P25 Network LDU1 Sent", buffer, 17U);
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ret = m_socket.write(buffer, 17U, m_address, m_port);
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if (!ret)
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return false;
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// The '69' record
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::memset(buffer, 0x00U, 17U);
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buffer[0U] = 0x69U;
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buffer[1U] = 0x0EU; // XXX ???
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buffer[2U] = 0x74U; // XXX ???
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buffer[3U] = 0xBCU; // XXX ???
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m_audio.decode(ldu1, buffer + 5U, 7U);
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buffer[16U] = 0x02U;
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if (m_debug)
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CUtils::dump(1U, "P25 Network LDU1 Sent", buffer, 17U);
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ret = m_socket.write(buffer, 17U, m_address, m_port);
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if (!ret)
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return false;
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// The '6A' record
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::memset(buffer, 0x00U, 16U);
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buffer[0U] = 0x6AU;
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buffer[1U] = lsd.getLSD1();
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buffer[2U] = lsd.getLSD2();
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buffer[3U] = 0x0EU; // XXX ???
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m_audio.decode(ldu1, buffer + 4U, 8U);
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buffer[15U] = end ? 0x00U : 0x02U;
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if (m_debug)
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CUtils::dump(1U, "P25 Network LDU1 Sent", buffer, 16U);
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ret = m_socket.write(buffer, 16U, m_address, m_port);
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if (!ret)
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return false;
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return true;
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}
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bool CP25Network::writeLDU2(const unsigned char* ldu2, const CP25Data& control, const CP25LowSpeedData& lsd, bool end)
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{
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assert(ldu2 != NULL);
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unsigned char buffer[22U];
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// The '6B' record
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::memcpy(buffer, REC6B, 22U);
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m_audio.decode(ldu2, buffer + 10U, 0U);
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if (m_debug)
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CUtils::dump(1U, "P25 Network LDU2 Sent", buffer, 22U);
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bool ret = m_socket.write(buffer, 22U, m_address, m_port);
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if (!ret)
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return false;
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// The '6C' record
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::memset(buffer, 0x00U, 14U);
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buffer[0U] = 0x6CU;
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m_audio.decode(ldu2, buffer + 1U, 1U);
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buffer[12U] = 0x02U;
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buffer[13U] = 0xF6U;
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if (m_debug)
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CUtils::dump(1U, "P25 Network LDU2 Sent", buffer, 14U);
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ret = m_socket.write(buffer, 14U, m_address, m_port);
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if (!ret)
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return false;
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unsigned char mi[P25_MI_LENGTH_BYTES];
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control.getMI(mi);
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// The '6D' record
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::memset(buffer, 0x00U, 17U);
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buffer[0U] = 0x6DU;
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buffer[1U] = mi[0U];
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buffer[2U] = mi[1U];
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buffer[3U] = mi[2U];
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m_audio.decode(ldu2, buffer + 5U, 2U);
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buffer[16U] = 0x02U;
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if (m_debug)
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CUtils::dump(1U, "P25 Network LDU2 Sent", buffer, 17U);
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ret = m_socket.write(buffer, 17U, m_address, m_port);
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if (!ret)
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return false;
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// The '6E' record
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::memset(buffer, 0x00U, 17U);
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buffer[0U] = 0x6EU;
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buffer[1U] = mi[3U];
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buffer[2U] = mi[4U];
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buffer[3U] = mi[5U];
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m_audio.decode(ldu2, buffer + 5U, 3U);
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buffer[16U] = 0x02U;
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if (m_debug)
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CUtils::dump(1U, "P25 Network LDU2 Sent", buffer, 17U);
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ret = m_socket.write(buffer, 17U, m_address, m_port);
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if (!ret)
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return false;
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// The '6F' record
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::memset(buffer, 0x00U, 17U);
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buffer[0U] = 0x6FU;
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buffer[1U] = mi[6U];
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buffer[2U] = mi[7U];
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buffer[3U] = mi[8U];
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m_audio.decode(ldu2, buffer + 5U, 4U);
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buffer[16U] = 0x02U;
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if (m_debug)
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CUtils::dump(1U, "P25 Network LDU2 Sent", buffer, 17U);
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ret = m_socket.write(buffer, 17U, m_address, m_port);
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if (!ret)
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return false;
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// The '70' record
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::memset(buffer, 0x00U, 17U);
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buffer[0U] = 0x70U;
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buffer[1U] = control.getAlgId();
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unsigned int id = control.getKId();
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buffer[2U] = (id >> 8) & 0xFFU;
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buffer[3U] = (id >> 0) & 0xFFU;
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m_audio.decode(ldu2, buffer + 5U, 5U);
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buffer[16U] = 0x02U;
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if (m_debug)
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CUtils::dump(1U, "P25 Network LDU2 Sent", buffer, 17U);
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ret = m_socket.write(buffer, 17U, m_address, m_port);
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if (!ret)
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return false;
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// The '71' record
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::memset(buffer, 0x00U, 17U);
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buffer[0U] = 0x71U;
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buffer[1U] = 0xACU; // XXX ???
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buffer[2U] = 0xB8U; // XXX ???
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buffer[3U] = 0xA4U; // XXX ???
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m_audio.decode(ldu2, buffer + 5U, 6U);
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buffer[16U] = 0x02U;
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if (m_debug)
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CUtils::dump(1U, "P25 Network LDU2 Sent", buffer, 17U);
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ret = m_socket.write(buffer, 17U, m_address, m_port);
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if (!ret)
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return false;
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// The '72' record
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::memset(buffer, 0x00U, 17U);
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buffer[0U] = 0x72U;
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buffer[1U] = 0x9BU; // XXX ???
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buffer[2U] = 0xDCU; // XXX ???
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buffer[3U] = 0x75U; // XXX ???
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m_audio.decode(ldu2, buffer + 5U, 7U);
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buffer[16U] = 0x02U;
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if (m_debug)
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CUtils::dump(1U, "P25 Network LDU2 Sent", buffer, 17U);
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ret = m_socket.write(buffer, 17U, m_address, m_port);
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if (!ret)
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return false;
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// The '73' record
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::memset(buffer, 0x00U, 16U);
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buffer[0U] = 0x73U;
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buffer[1U] = lsd.getLSD1();
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buffer[2U] = lsd.getLSD2();
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buffer[3U] = 0x06U; // XXX ???
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m_audio.decode(ldu2, buffer + 4U, 8U);
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buffer[15U] = end ? 0x00U : 0x02U;
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if (m_debug)
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CUtils::dump(1U, "P25 Network LDU2 Sent", buffer, 16U);
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ret = m_socket.write(buffer, 16U, m_address, m_port);
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if (!ret)
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return false;
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return true;
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}
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void CP25Network::clock(unsigned int ms)
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{
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unsigned char buffer[BUFFER_LENGTH];
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in_addr address;
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unsigned int port;
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int length = m_socket.read(buffer, BUFFER_LENGTH, address, port);
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if (length <= 0)
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return;
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// Check if the data is for us
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if (m_address.s_addr != address.s_addr || m_port != port) {
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LogMessage("P25 packet received from an invalid source, %08X != %08X and/or %u != %u", m_address.s_addr, address.s_addr, m_port, port);
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return;
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}
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if (!m_enabled)
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return;
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if (m_debug)
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CUtils::dump(1U, "P25 Network Received", buffer, length);
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unsigned char c = length;
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m_buffer.addData(&c, 1U);
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m_buffer.addData(buffer, length);
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}
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unsigned int CP25Network::read(unsigned char* data, unsigned int length)
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{
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assert(data != NULL);
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if (m_buffer.isEmpty())
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return 0U;
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unsigned char c = 0U;
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m_buffer.getData(&c, 1U);
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assert(c <= length);
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m_buffer.getData(data, c);
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return c;
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}
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void CP25Network::close()
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{
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m_socket.close();
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LogMessage("Closing P25 network connection");
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}
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void CP25Network::enable(bool enabled)
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{
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m_enabled = enabled;
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}
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