mirror of https://github.com/ShaYmez/xlxd.git
136 lines
4.1 KiB
C++
136 lines
4.1 KiB
C++
//
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// cg3protocol.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 cg3protocol_h
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#define cg3protocol_h
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#include <string>
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#include "ctimepoint.h"
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#include "cprotocol.h"
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#include "cdvheaderpacket.h"
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#include "cdvframepacket.h"
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#include "cdvlastframepacket.h"
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////////////////////////////////////////////////////////////////////////////////////////
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// note on the G3 terminal/AP protocol:
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//
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// There are 3 steps in handling an incoming connection
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//
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// 1 - Notification of terminal call on port UDP 12346
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// - Call will be rejected if in blacklisted
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//
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// 2 - Destination request on port UDP 12345
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// - Calls to specific callsigns will be accepted for a default module
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// - Repeater calls will be accepted for local modules
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// - All other calls are rehected
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//
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// 3 - Actual D-star flow like in Dextra to/from port 40000 (2 distint sockets)
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//
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// Alive monitoring is done via a "PING" to remote port 40000. We will get an
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// ICMP unreachable on terminal mode close or on station shut down if routing is done
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// correctly. Otherwise a long timeout is used (e.g. 1h)
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////////////////////////////////////////////////////////////////////////////////////////
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// class
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class CG3Protocol : public CProtocol
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{
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public:
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// constructor
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CG3Protocol() : m_GwAddress(0u), m_Modules("*"), m_LastModTime(0) {};
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// destructor
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virtual ~CG3Protocol() {};
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// initialization
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bool Init(void);
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// close
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void Close(void);
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// task
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void Task(void);
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protected:
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// threads
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static void PresenceThread(CG3Protocol *);
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static void ConfigThread(CG3Protocol *);
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static void IcmpThread(CG3Protocol *);
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// helper tasks
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void PresenceTask(void);
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void ConfigTask(void);
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void IcmpTask(void);
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// config
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void ReadOptions(void);
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// helper
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char *TrimWhiteSpaces(char *);
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void NeedReload(void);
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// queue helper
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void HandleQueue(void);
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// keepalive helpers
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void HandleKeepalives(void);
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// stream helpers
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bool OnDvHeaderPacketIn(CDvHeaderPacket *, const CIp &);
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// packet decoding helpers
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CDvHeaderPacket *IsValidDvHeaderPacket(const CBuffer &);
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CDvFramePacket *IsValidDvFramePacket(const CBuffer &);
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CDvLastFramePacket *IsValidDvLastFramePacket(const CBuffer &);
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// packet encoding helpers
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bool EncodeDvHeaderPacket(const CDvHeaderPacket &, CBuffer *) const;
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bool EncodeDvFramePacket(const CDvFramePacket &, CBuffer *) const;
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bool EncodeDvLastFramePacket(const CDvLastFramePacket &, CBuffer *) const;
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protected:
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std::thread *m_pPresenceThread;
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std::thread *m_pConfigThread;
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std::thread *m_pIcmpThread;
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// time
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CTimePoint m_LastKeepaliveTime;
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// sockets
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CUdpSocket m_DvOutSocket;
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CUdpSocket m_PresenceSocket;
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CUdpSocket m_ConfigSocket;
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int m_IcmpRawSocket;
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// optional params
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uint32 m_GwAddress;
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std::string m_Modules;
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time_t m_LastModTime;
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};
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////////////////////////////////////////////////////////////////////////////////////////
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#endif /* cg3protocol_h */
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