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82 lines
2.3 KiB
82 lines
2.3 KiB
// Copyright © 2015 Jean-Luc Deltombe (LX3JL). All rights reserved.
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// urfd -- The universal reflector
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// Copyright © 2021 Thomas A. Early N7TAE
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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 3 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, see <https://www.gnu.org/licenses/>.
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#pragma once
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#include "Defines.h"
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#include "Timer.h"
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#include "Protocol.h"
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#include "DVHeaderPacket.h"
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#include "DVFramePacket.h"
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#include "M17CRC.h"
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////////////////////////////////////////////////////////////////////////////////////////
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// define
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////////////////////////////////////////////////////////////////////////////////////////
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// class
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class CM17StreamCacheItem
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{
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public:
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CM17StreamCacheItem() : m_iSeqCounter(0) {}
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CDvHeaderPacket m_dvHeader;
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uint32_t m_iSeqCounter;
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};
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class CM17Protocol : public CProtocol
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{
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public:
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// initialization
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bool Initialize(const char *type, const EProtocol ptype, const uint16_t port, const bool has_ipv4, const bool has_ipv6);
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// task
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void Task(void);
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protected:
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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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void OnDvHeaderPacketIn(std::unique_ptr<CDvHeaderPacket> &, const CIp &);
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// packet decoding helpers
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bool IsValidConnectPacket(const CBuffer &, CCallsign &, char &);
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bool IsValidDisconnectPacket(const CBuffer &, CCallsign &);
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bool IsValidKeepAlivePacket(const CBuffer &, CCallsign &);
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bool IsValidDvPacket(const CBuffer &, std::unique_ptr<CDvHeaderPacket> &, std::unique_ptr<CDvFramePacket> &);
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// packet encoding helpers
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void EncodeKeepAlivePacket(CBuffer &);
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void EncodeM17Packet(SM17Frame &, const CDvHeaderPacket &, const CDvFramePacket *, uint32_t) const;
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protected:
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// for keep alive
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CTimer m_LastKeepaliveTime;
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// for queue header caches
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std::unordered_map<char, CM17StreamCacheItem> m_StreamsCache;
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private:
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CM17CRC m17crc;
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};
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