mirror of https://github.com/LX3JL/xlxd.git
Marius Petrescu, YO2LOJ
7 years ago
parent
12eebc9011
commit
8b55c970be
@ -0,0 +1,54 @@
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//
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// cg3client.cpp
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// xlxd
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//
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// Created by Marius Petrescu (YO2LOJ) on 03/06/2019.
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// Copyright © 2019 Marius Petrescu (YO2LOJ). All rights reserved.
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//
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// ----------------------------------------------------------------------------
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// This file is part of xlxd.
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//
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// xlxd 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 3 of the License, or
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// (at your option) any later version.
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//
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// xlxd 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 Foobar. If not, see <http://www.gnu.org/licenses/>.
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// ----------------------------------------------------------------------------
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#include "main.h"
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#include "cg3client.h"
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////////////////////////////////////////////////////////////////////////////////////////
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// constructors
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CG3Client::CG3Client()
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{
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}
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CG3Client::CG3Client(const CCallsign &callsign, const CIp &ip, char reflectorModule)
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: CClient(callsign, ip, reflectorModule)
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{
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}
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CG3Client::CG3Client(const CG3Client &client)
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: CClient(client)
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{
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}
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////////////////////////////////////////////////////////////////////////////////////////
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// status
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bool CG3Client::IsAlive(void) const
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{
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return (m_LastKeepaliveTime.DurationSinceNow() < G3_KEEPALIVE_TIMEOUT);
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}
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@ -0,0 +1,62 @@
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//
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// cg3client.h
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// xlxd
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//
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// Created by Marius Petrescu (YO2LOJ) on 03/06/2019.
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// Copyright © 2019 Marius Petrescu (YO2LOJ). All rights reserved.
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//
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// ----------------------------------------------------------------------------
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// This file is part of xlxd.
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//
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// xlxd 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 3 of the License, or
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// (at your option) any later version.
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//
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// xlxd 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 Foobar. If not, see <http://www.gnu.org/licenses/>.
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// ----------------------------------------------------------------------------
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#ifndef cg3client_h
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#define cg3client_h
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#include "cclient.h"
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////////////////////////////////////////////////////////////////////////////////////////
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// define
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////////////////////////////////////////////////////////////////////////////////////////
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// class
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class CG3Client : public CClient
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{
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public:
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// constructors
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CG3Client();
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CG3Client(const CCallsign &, const CIp &, char = ' ');
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CG3Client(const CG3Client &);
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// destructor
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virtual ~CG3Client() {};
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// identity
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int GetProtocol(void) const { return PROTOCOL_G3; }
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const char *GetProtocolName(void) const { return "Terminal/AP"; }
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int GetCodec(void) const { return CODEC_AMBEPLUS; }
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bool IsNode(void) const { return true; }
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// status
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bool IsAlive(void) const;
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protected:
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// data
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};
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////////////////////////////////////////////////////////////////////////////////////////
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#endif /* cg3client_h */
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@ -0,0 +1,726 @@
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//
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// cg3protocol.cpp
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// xlxd
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//
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// Created by Marius Petrescu (YO2LOJ) on 03/06/2019.
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// Copyright © 2019 Marius Petrescu (YO2LOJ). All rights reserved.
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//
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// ----------------------------------------------------------------------------
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// This file is part of xlxd.
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//
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// xlxd 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 3 of the License, or
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// (at your option) any later version.
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//
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// xlxd 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 Foobar. If not, see <http://www.gnu.org/licenses/>.
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// ----------------------------------------------------------------------------
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#include "main.h"
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#include <string.h>
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#include "cg3client.h"
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#include "cg3protocol.h"
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#include "creflector.h"
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#include "cgatekeeper.h"
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#include <netinet/ip.h>
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#include <netinet/ip_icmp.h>
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////////////////////////////////////////////////////////////////////////////////////////
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// operation
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bool CG3Protocol::Init(void)
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{
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bool ok;
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// base class
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ok = CProtocol::Init();
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// update reflector callsign
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m_ReflectorCallsign.PatchCallsign(0, (const uint8 *)"XRF", 3);
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// create our DV socket
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ok &= m_Socket.Open(G3_DV_PORT);
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if ( !ok )
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{
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std::cout << "Error opening socket on port UDP" << G3_DV_PORT << " on ip " << g_Reflector.GetListenIp() << std::endl;
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}
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//create helper sockets
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ok &= m_PresenceSocket.Open(G3_PRESENCE_PORT);
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if ( !ok )
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{
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std::cout << "Error opening socket on port UDP" << G3_PRESENCE_PORT << " on ip " << g_Reflector.GetListenIp() << std::endl;
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}
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ok &= m_ConfigSocket.Open(G3_CONFIG_PORT);
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if ( !ok )
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{
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std::cout << "Error opening socket on port UDP" << G3_CONFIG_PORT << " on ip " << g_Reflector.GetListenIp() << std::endl;
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}
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ok &= ((m_IcmpRawSocket = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) >= 0);
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if ( !ok )
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{
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std::cout << "Error opening raw socket for ICMP" << std::endl;
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}
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if (ok)
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{
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// start helper threads
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m_pPresenceThread = new std::thread(PresenceThread, this);
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m_pPresenceThread = new std::thread(ConfigThread, this);
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m_pPresenceThread = new std::thread(IcmpThread, this);
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}
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// update time
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m_LastKeepaliveTime.Now();
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// done
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return ok;
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}
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void CG3Protocol::Close(void)
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{
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if (m_pPresenceThread != NULL)
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{
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m_pPresenceThread->join();
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delete m_pPresenceThread;
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m_pPresenceThread = NULL;
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}
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if (m_pConfigThread != NULL)
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{
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m_pConfigThread->join();
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delete m_pConfigThread;
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m_pConfigThread = NULL;
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}
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if (m_pIcmpThread != NULL)
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{
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m_pIcmpThread->join();
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delete m_pIcmpThread;
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m_pIcmpThread = NULL;
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}
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}
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////////////////////////////////////////////////////////////////////////////////////////
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// private threads
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void CG3Protocol::PresenceThread(CG3Protocol *This)
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{
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while ( !This->m_bStopThread )
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{
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This->PresenceTask();
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}
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}
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void CG3Protocol::ConfigThread(CG3Protocol *This)
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{
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while ( !This->m_bStopThread )
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{
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This->ConfigTask();
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}
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}
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void CG3Protocol::IcmpThread(CG3Protocol *This)
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{
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fcntl(This->m_IcmpRawSocket, F_SETFL, O_NONBLOCK);
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while ( !This->m_bStopThread )
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{
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This->IcmpTask();
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}
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close(This->m_IcmpRawSocket);
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}
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////////////////////////////////////////////////////////////////////////////////////////
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// presence task
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void CG3Protocol::PresenceTask(void)
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{
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CBuffer Buffer;
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CIp ReqIp;
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CCallsign Callsign;
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CCallsign Owner;
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CCallsign Terminal;
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if ( m_PresenceSocket.Receive(&Buffer, &ReqIp, 20) != -1 )
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{
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CIp Ip(ReqIp);
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Ip.GetSockAddr()->sin_port = htons(G3_DV_PORT);
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if (Buffer.size() == 32)
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{
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Callsign.SetCallsign(&Buffer.data()[8], 8);
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Owner.SetCallsign(&Buffer.data()[16], 8);
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Terminal.SetCallsign(&Buffer.data()[24], 8);
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std::cout << "Presence from " << Ip << " as " << Callsign << " on terminal " << Terminal << std::endl;
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// accept
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Buffer.data()[2] = 0x80; // response
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Buffer.data()[3] = 0x00; // ok
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// todo: handle reflector IP 0.0.0.0
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Buffer.Append(g_Reflector.GetListenIp().GetAddr());
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CClients *clients = g_Reflector.GetClients();
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int index = -1;
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CClient *extant = NULL;
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while ( (extant = clients->FindNextClient(PROTOCOL_G3, &index)) != NULL )
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{
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CIp ClIp = extant->GetIp();
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if (ClIp.GetAddr() == Ip.GetAddr())
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{
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break;
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}
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}
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if (extant == NULL)
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{
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// create client
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CG3Client *client = new CG3Client(Terminal, Ip);
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// and append
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clients->AddClient(client);
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}
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else
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{
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if (!extant->GetCallsign().HasSameCallsign(Terminal))
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{
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//delete old client
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clients->RemoveClient(extant);
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// create new client
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CG3Client *client = new CG3Client(Terminal, Ip);
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// and append
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clients->AddClient(client);
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}
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}
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g_Reflector.ReleaseClients();
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m_PresenceSocket.Send(Buffer, ReqIp);
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}
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}
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}
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////////////////////////////////////////////////////////////////////////////////////////
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// configuration task
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void CG3Protocol::ConfigTask(void)
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{
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CBuffer Buffer;
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CIp Ip;
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CCallsign Call;
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bool isRepeaterCall;
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if ( m_ConfigSocket.Receive(&Buffer, &Ip, 20) != -1 )
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{
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if (Buffer.size() == 16)
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{
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if (memcmp(&Buffer.data()[8], " ", 8) == 0)
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{
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Call.SetCallsign(GetReflectorCallsign(), 8);
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}
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else
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{
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Call.SetCallsign(&Buffer.data()[8], 8);
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}
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isRepeaterCall = ((Buffer.data()[2] & 0x10) == 0x10);
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std::cout << "Config request from " << Ip << " for " << Call << " (" << ((char *)(isRepeaterCall)?"repeater":"routed") << ")" << std::endl;
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//std::cout << "Local address: " << inet_ntoa(*m_ConfigSocket.GetLocalAddr()) << std::endl;
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Buffer.data()[2] |= 0x80; // response
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if (isRepeaterCall)
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{
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if ((Call.HasSameCallsign(GetReflectorCallsign())) && (g_Reflector.IsValidModule(Call.GetModule())))
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{
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Buffer.data()[3] = 0x00; // ok
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}
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else
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{
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Buffer.data()[3] = 0x01; // reject
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}
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}
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else
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{
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// reject routed calls for now
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Buffer.data()[3] = 0x01; // reject
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}
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// UR
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Buffer.resize(8);
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Buffer.Append((uint8 *)(const char *)Call, CALLSIGN_LEN - 1);
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Buffer.Append((uint8)Call.GetModule());
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// RPT1
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Buffer.Append((uint8 *)(const char *)GetReflectorCallsign(), CALLSIGN_LEN - 1);
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Buffer.Append((uint8)'G');
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// RPT2
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Buffer.Append((uint8 *)(const char *)GetReflectorCallsign(), CALLSIGN_LEN - 1);
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if (isRepeaterCall)
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{
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Buffer.Append((uint8)Call.GetModule());
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}
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else
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{
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// routed - no module for now
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Buffer.Append((uint8)' ');
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}
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if (Buffer.data()[3] == 0x00)
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{
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Buffer.Append(*(uint32 *)m_ConfigSocket.GetLocalAddr());
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}
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else
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{
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Buffer.Append(0u);
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}
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m_ConfigSocket.Send(Buffer, Ip);
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}
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}
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}
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////////////////////////////////////////////////////////////////////////////////////////
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// icmp task
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void CG3Protocol::IcmpTask(void)
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{
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unsigned char buffer[256];
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struct sockaddr_in sa;
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unsigned int sasize = sizeof(sa);
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fd_set FdSet;
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struct timeval tv;
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if (m_IcmpRawSocket != -1)
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{
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FD_ZERO(&FdSet);
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FD_SET(m_IcmpRawSocket, &FdSet);
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tv.tv_sec = 0;
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tv.tv_usec = 100000;
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select(m_IcmpRawSocket + 1, &FdSet, 0, 0, &tv);
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int len = recvfrom(m_IcmpRawSocket, buffer, 255, 0, (struct sockaddr *)&sa, &sasize);
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if (len > 28)
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{
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struct ip *iph = (struct ip *)buffer;
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int iphdrlen = iph->ip_hl * 4;
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struct icmp *icmph = (struct icmp *)(buffer + iphdrlen);
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if (icmph->icmp_type == ICMP_DEST_UNREACH)
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{
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struct ip *remote_iph = (struct ip *)(buffer + iphdrlen + 8);
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CClients *clients = g_Reflector.GetClients();
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int index = -1;
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CClient *client = NULL;
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while ( (client = clients->FindNextClient(PROTOCOL_G3, &index)) != NULL )
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{
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CIp Ip = client->GetIp();
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if (Ip.GetAddr() == remote_iph->ip_dst.s_addr)
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{
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clients->RemoveClient(client);
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}
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}
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g_Reflector.ReleaseClients();
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}
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}
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}
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}
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////////////////////////////////////////////////////////////////////////////////////////
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// task
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void CG3Protocol::Task(void)
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{
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CBuffer Buffer;
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CIp Ip;
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CCallsign Callsign;
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char ToLinkModule;
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int ProtRev;
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CDvHeaderPacket *Header;
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CDvFramePacket *Frame;
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CDvLastFramePacket *LastFrame;
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// any incoming packet ?
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if ( m_Socket.Receive(&Buffer, &Ip, 20) != -1 )
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{
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CIp ClIp;
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CIp *BaseIp = NULL;
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CClients *clients = g_Reflector.GetClients();
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int index = -1;
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CClient *client = NULL;
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while ( (client = clients->FindNextClient(PROTOCOL_G3, &index)) != NULL )
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{
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ClIp = client->GetIp();
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if (ClIp.GetAddr() == Ip.GetAddr())
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{
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BaseIp = &ClIp;
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client->Alive();
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// supress host checks
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m_LastKeepaliveTime.Now();
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break;
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}
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}
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g_Reflector.ReleaseClients();
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if (BaseIp != NULL)
|
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{
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// crack the packet
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if ( (Frame = IsValidDvFramePacket(Buffer)) != NULL )
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{
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//std::cout << "Terminal DV frame" << std::endl;
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// handle it
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OnDvFramePacketIn(Frame, BaseIp);
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}
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else if ( (Header = IsValidDvHeaderPacket(Buffer)) != NULL )
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{
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//std::cout << "Terminal DV header" << std::endl;
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// callsign muted?
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if ( g_GateKeeper.MayTransmit(Header->GetMyCallsign(), Ip, PROTOCOL_G3, Header->GetRpt2Module()) )
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{
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// handle it
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OnDvHeaderPacketIn(Header, *BaseIp);
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}
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else
|
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{
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||||
delete Header;
|
||||
}
|
||||
}
|
||||
else if ( (LastFrame = IsValidDvLastFramePacket(Buffer)) != NULL )
|
||||
{
|
||||
//std::cout << "Terminal DV last frame" << std::endl;
|
||||
|
||||
// handle it
|
||||
OnDvLastFramePacketIn(LastFrame, BaseIp);
|
||||
}
|
||||
else
|
||||
{
|
||||
//std::cout << "Invalid terminal packet (" << Buffer.size() << ")" << std::endl;
|
||||
//std::cout << Buffer.data() << std::endl;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
//std::cout << "Invalid client " << Ip << std::endl;
|
||||
}
|
||||
}
|
||||
|
||||
// handle end of streaming timeout
|
||||
CheckStreamsTimeout();
|
||||
|
||||
// handle queue from reflector
|
||||
HandleQueue();
|
||||
|
||||
// keep alive
|
||||
if ( m_LastKeepaliveTime.DurationSinceNow() > G3_KEEPALIVE_PERIOD )
|
||||
{
|
||||
// handle keep alives
|
||||
HandleKeepalives();
|
||||
|
||||
// update time
|
||||
m_LastKeepaliveTime.Now();
|
||||
}
|
||||
}
|
||||
|
||||
////////////////////////////////////////////////////////////////////////////////////////
|
||||
// queue helper
|
||||
|
||||
void CG3Protocol::HandleQueue(void)
|
||||
{
|
||||
m_Queue.Lock();
|
||||
while ( !m_Queue.empty() )
|
||||
{
|
||||
// supress host checks
|
||||
m_LastKeepaliveTime.Now();
|
||||
|
||||
// get the packet
|
||||
CPacket *packet = m_Queue.front();
|
||||
m_Queue.pop();
|
||||
|
||||
// encode it
|
||||
CBuffer buffer;
|
||||
if ( EncodeDvPacket(*packet, &buffer) )
|
||||
{
|
||||
// and push it to all our clients linked to the module and who are not streaming in
|
||||
CClients *clients = g_Reflector.GetClients();
|
||||
int index = -1;
|
||||
CClient *client = NULL;
|
||||
while ( (client = clients->FindNextClient(PROTOCOL_G3, &index)) != NULL )
|
||||
{
|
||||
// is this client busy ?
|
||||
if ( !client->IsAMaster() && (client->GetReflectorModule() == packet->GetModuleId()) )
|
||||
{
|
||||
// not busy, send the packet
|
||||
int n = packet->IsDvHeader() ? 5 : 1;
|
||||
for ( int i = 0; i < n; i++ )
|
||||
{
|
||||
m_Socket.Send(buffer, client->GetIp());
|
||||
}
|
||||
}
|
||||
}
|
||||
g_Reflector.ReleaseClients();
|
||||
}
|
||||
|
||||
// done
|
||||
delete packet;
|
||||
}
|
||||
m_Queue.Unlock();
|
||||
}
|
||||
|
||||
////////////////////////////////////////////////////////////////////////////////////////
|
||||
// keepalive helpers
|
||||
|
||||
void CG3Protocol::HandleKeepalives(void)
|
||||
{
|
||||
// G3 Terminal mode does not support keepalive
|
||||
// We will send some short packed and expect
|
||||
// A ICMP unreachable on failure
|
||||
CBuffer keepalive((uint8 *)"PING", 4);
|
||||
|
||||
// iterate on clients
|
||||
CClients *clients = g_Reflector.GetClients();
|
||||
int index = -1;
|
||||
CClient *client = NULL;
|
||||
while ( (client = clients->FindNextClient(PROTOCOL_G3, &index)) != NULL )
|
||||
{
|
||||
if (!client->IsAlive())
|
||||
{
|
||||
clients->RemoveClient(client);
|
||||
}
|
||||
else
|
||||
{
|
||||
// send keepalive packet
|
||||
m_Socket.Send(keepalive, client->GetIp());
|
||||
}
|
||||
}
|
||||
g_Reflector.ReleaseClients();
|
||||
}
|
||||
|
||||
////////////////////////////////////////////////////////////////////////////////////////
|
||||
// streams helpers
|
||||
|
||||
bool CG3Protocol::OnDvHeaderPacketIn(CDvHeaderPacket *Header, const CIp &Ip)
|
||||
{
|
||||
bool newstream = false;
|
||||
|
||||
// find the stream
|
||||
CPacketStream *stream = GetStream(Header->GetStreamId(), &Ip);
|
||||
|
||||
if ( stream == NULL )
|
||||
{
|
||||
// no stream open yet, open a new one
|
||||
CCallsign via(Header->GetRpt1Callsign());
|
||||
|
||||
// find this client
|
||||
CClients *clients = g_Reflector.GetClients();
|
||||
|
||||
int index = -1;
|
||||
CClient *client = NULL;
|
||||
while ( (client = clients->FindNextClient(PROTOCOL_G3, &index)) != NULL )
|
||||
{
|
||||
CIp ClIp = client->GetIp();
|
||||
if (ClIp.GetAddr() == Ip.GetAddr())
|
||||
{
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if ( client != NULL )
|
||||
{
|
||||
|
||||
// move it to the proper module
|
||||
if (m_ReflectorCallsign.HasSameCallsign(Header->GetRpt2Callsign()))
|
||||
{
|
||||
if (client->GetReflectorModule() != Header->GetRpt2Callsign().GetModule())
|
||||
{
|
||||
client->SetReflectorModule(Header->GetRpt2Callsign().GetModule());
|
||||
}
|
||||
|
||||
// get client callsign
|
||||
via = client->GetCallsign();
|
||||
|
||||
// and try to open the stream
|
||||
if ( (stream = g_Reflector.OpenStream(Header, client)) != NULL )
|
||||
{
|
||||
// keep the handle
|
||||
m_Streams.push_back(stream);
|
||||
newstream = true;
|
||||
}
|
||||
|
||||
// update last heard
|
||||
g_Reflector.GetUsers()->Hearing(Header->GetMyCallsign(), via, Header->GetRpt2Callsign());
|
||||
g_Reflector.ReleaseUsers();
|
||||
|
||||
// delete header if needed
|
||||
if ( !newstream )
|
||||
{
|
||||
delete Header;
|
||||
}
|
||||
|
||||
}
|
||||
else
|
||||
{
|
||||
// drop
|
||||
delete Header;
|
||||
}
|
||||
}
|
||||
// release
|
||||
g_Reflector.ReleaseClients();
|
||||
}
|
||||
else
|
||||
{
|
||||
// stream already open
|
||||
// skip packet, but tickle the stream
|
||||
stream->Tickle();
|
||||
// and delete packet
|
||||
delete Header;
|
||||
}
|
||||
|
||||
// done
|
||||
return newstream;
|
||||
}
|
||||
|
||||
|
||||
////////////////////////////////////////////////////////////////////////////////////////
|
||||
// packet decoding helpers
|
||||
|
||||
CDvHeaderPacket *CG3Protocol::IsValidDvHeaderPacket(const CBuffer &Buffer)
|
||||
{
|
||||
CDvHeaderPacket *header = NULL;
|
||||
|
||||
if ( (Buffer.size() == 56) && (Buffer.Compare((uint8 *)"DSVT", 4) == 0) &&
|
||||
(Buffer.data()[4] == 0x10) && (Buffer.data()[8] == 0x20) )
|
||||
{
|
||||
// create packet
|
||||
header = new CDvHeaderPacket((struct dstar_header *)&(Buffer.data()[15]),
|
||||
*((uint16 *)&(Buffer.data()[12])), 0x80);
|
||||
// check validity of packet
|
||||
if ( !header->IsValid() )
|
||||
{
|
||||
delete header;
|
||||
header = NULL;
|
||||
}
|
||||
}
|
||||
return header;
|
||||
}
|
||||
|
||||
CDvFramePacket *CG3Protocol::IsValidDvFramePacket(const CBuffer &Buffer)
|
||||
{
|
||||
CDvFramePacket *dvframe = NULL;
|
||||
|
||||
if ( (Buffer.size() == 27) && (Buffer.Compare((uint8 *)"DSVT", 4) == 0) &&
|
||||
(Buffer.data()[4] == 0x20) && (Buffer.data()[8] == 0x20) &&
|
||||
((Buffer.data()[14] & 0x40) == 0) )
|
||||
{
|
||||
// create packet
|
||||
dvframe = new CDvFramePacket((struct dstar_dvframe *)&(Buffer.data()[15]),
|
||||
*((uint16 *)&(Buffer.data()[12])), Buffer.data()[14]);
|
||||
// check validity of packet
|
||||
if ( !dvframe->IsValid() )
|
||||
{
|
||||
delete dvframe;
|
||||
dvframe = NULL;
|
||||
}
|
||||
}
|
||||
return dvframe;
|
||||
}
|
||||
|
||||
CDvLastFramePacket *CG3Protocol::IsValidDvLastFramePacket(const CBuffer &Buffer)
|
||||
{
|
||||
CDvLastFramePacket *dvframe = NULL;
|
||||
|
||||
if ( (Buffer.size() == 27) && (Buffer.Compare((uint8 *)"DSVT", 4) == 0) &&
|
||||
(Buffer.data()[4] == 0x20) && (Buffer.data()[8] == 0x20) &&
|
||||
((Buffer.data()[14] & 0x40) != 0) )
|
||||
{
|
||||
// create packet
|
||||
dvframe = new CDvLastFramePacket((struct dstar_dvframe *)&(Buffer.data()[15]),
|
||||
*((uint16 *)&(Buffer.data()[12])), Buffer.data()[14]);
|
||||
// check validity of packet
|
||||
if ( !dvframe->IsValid() )
|
||||
{
|
||||
delete dvframe;
|
||||
dvframe = NULL;
|
||||
}
|
||||
}
|
||||
return dvframe;
|
||||
}
|
||||
|
||||
////////////////////////////////////////////////////////////////////////////////////////
|
||||
// packet encoding helpers
|
||||
|
||||
bool CG3Protocol::EncodeDvHeaderPacket(const CDvHeaderPacket &Packet, CBuffer *Buffer) const
|
||||
{
|
||||
uint8 tag[] = { 'D','S','V','T',0x10,0x00,0x00,0x00,0x20,0x00,0x01,0x02 };
|
||||
struct dstar_header DstarHeader;
|
||||
|
||||
Packet.ConvertToDstarStruct(&DstarHeader);
|
||||
|
||||
Buffer->Set(tag, sizeof(tag));
|
||||
Buffer->Append(Packet.GetStreamId());
|
||||
Buffer->Append((uint8)0x80);
|
||||
Buffer->Append((uint8 *)&DstarHeader, sizeof(struct dstar_header));
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
bool CG3Protocol::EncodeDvFramePacket(const CDvFramePacket &Packet, CBuffer *Buffer) const
|
||||
{
|
||||
uint8 tag[] = { 'D','S','V','T',0x20,0x00,0x00,0x00,0x20,0x00,0x01,0x02 };
|
||||
|
||||
Buffer->Set(tag, sizeof(tag));
|
||||
Buffer->Append(Packet.GetStreamId());
|
||||
Buffer->Append((uint8)(Packet.GetPacketId() % 21));
|
||||
Buffer->Append((uint8 *)Packet.GetAmbe(), AMBE_SIZE);
|
||||
Buffer->Append((uint8 *)Packet.GetDvData(), DVDATA_SIZE);
|
||||
|
||||
return true;
|
||||
|
||||
}
|
||||
|
||||
bool CG3Protocol::EncodeDvLastFramePacket(const CDvLastFramePacket &Packet, CBuffer *Buffer) const
|
||||
{
|
||||
uint8 tag1[] = { 'D','S','V','T',0x20,0x00,0x00,0x00,0x20,0x00,0x01,0x02 };
|
||||
uint8 tag2[] = { 0x55,0xC8,0x7A,0x00,0x00,0x00,0x00,0x00,0x00,0x25,0x1A,0xC6 };
|
||||
|
||||
Buffer->Set(tag1, sizeof(tag1));
|
||||
Buffer->Append(Packet.GetStreamId());
|
||||
Buffer->Append((uint8)((Packet.GetPacketId() % 21) | 0x40));
|
||||
Buffer->Append(tag2, sizeof(tag2));
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
@ -0,0 +1,122 @@
|
||||
//
|
||||
// cg3protocol.h
|
||||
// xlxd
|
||||
//
|
||||
// Created by Marius Petrescu (YO2LOJ) on 03/06/2019.
|
||||
// Copyright © 2019 Marius Petrescu (YO2LOJ). All rights reserved.
|
||||
//
|
||||
// ----------------------------------------------------------------------------
|
||||
// This file is part of xlxd.
|
||||
//
|
||||
// xlxd 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 3 of the License, or
|
||||
// (at your option) any later version.
|
||||
//
|
||||
// xlxd 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 Foobar. If not, see <http://www.gnu.org/licenses/>.
|
||||
// ----------------------------------------------------------------------------
|
||||
|
||||
#ifndef cg3protocol_h
|
||||
#define cg3protocol_h
|
||||
|
||||
#include "ctimepoint.h"
|
||||
#include "cprotocol.h"
|
||||
#include "cdvheaderpacket.h"
|
||||
#include "cdvframepacket.h"
|
||||
#include "cdvlastframepacket.h"
|
||||
|
||||
////////////////////////////////////////////////////////////////////////////////////////
|
||||
|
||||
// note on the G3 terminal/AP protocol:
|
||||
//
|
||||
// There are 3 steps in handling an incoming connection
|
||||
//
|
||||
// 1 - Notification of terminal call on port UDP 12346
|
||||
// - Call will be rejected if in blacklisted
|
||||
//
|
||||
// 2 - Destination request on port UDP 12345
|
||||
// - Calls to specific callsigns will be accepted for a default module
|
||||
// - Repeater calls will be accepted for local modules
|
||||
// - All other calls are rehected
|
||||
//
|
||||
// 3 - Actual D-star flow like in Dextra to/from port 40000 (2 distint sockets)
|
||||
//
|
||||
// Alive monitoring is done via a "PING" to remote port 40000. We will get an
|
||||
// ICMP unreachable on terminal mode close or on station shut down if routing is done
|
||||
// correctly. Otherwise a long timeout is used (e.g. 1h)
|
||||
|
||||
|
||||
////////////////////////////////////////////////////////////////////////////////////////
|
||||
// class
|
||||
|
||||
class CG3Protocol : public CProtocol
|
||||
{
|
||||
public:
|
||||
// constructor
|
||||
CG3Protocol() {};
|
||||
|
||||
// destructor
|
||||
virtual ~CG3Protocol() {};
|
||||
|
||||
// initialization
|
||||
bool Init(void);
|
||||
|
||||
// close
|
||||
void Close(void);
|
||||
|
||||
// task
|
||||
void Task(void);
|
||||
|
||||
protected:
|
||||
// threads
|
||||
static void PresenceThread(CG3Protocol *);
|
||||
static void ConfigThread(CG3Protocol *);
|
||||
static void IcmpThread(CG3Protocol *);
|
||||
|
||||
// helper tasks
|
||||
void PresenceTask(void);
|
||||
void ConfigTask(void);
|
||||
void IcmpTask(void);
|
||||
|
||||
// queue helper
|
||||
void HandleQueue(void);
|
||||
|
||||
// keepalive helpers
|
||||
void HandleKeepalives(void);
|
||||
|
||||
// stream helpers
|
||||
bool OnDvHeaderPacketIn(CDvHeaderPacket *, const CIp &);
|
||||
|
||||
// packet decoding helpers
|
||||
CDvHeaderPacket *IsValidDvHeaderPacket(const CBuffer &);
|
||||
CDvFramePacket *IsValidDvFramePacket(const CBuffer &);
|
||||
CDvLastFramePacket *IsValidDvLastFramePacket(const CBuffer &);
|
||||
|
||||
// packet encoding helpers
|
||||
bool EncodeDvHeaderPacket(const CDvHeaderPacket &, CBuffer *) const;
|
||||
bool EncodeDvFramePacket(const CDvFramePacket &, CBuffer *) const;
|
||||
bool EncodeDvLastFramePacket(const CDvLastFramePacket &, CBuffer *) const;
|
||||
|
||||
protected:
|
||||
std::thread *m_pPresenceThread;
|
||||
std::thread *m_pConfigThread;
|
||||
std::thread *m_pIcmpThread;
|
||||
|
||||
// time
|
||||
CTimePoint m_LastKeepaliveTime;
|
||||
|
||||
// sockets
|
||||
CUdpSocket m_DvOutSocket;
|
||||
CUdpSocket m_PresenceSocket;
|
||||
CUdpSocket m_ConfigSocket;
|
||||
int m_IcmpRawSocket;
|
||||
};
|
||||
|
||||
////////////////////////////////////////////////////////////////////////////////////////
|
||||
#endif /* cg3protocol_h */
|
||||
Loading…
Reference in new issue