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105 lines
3.2 KiB
105 lines
3.2 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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////////////////////////////////////////////////////////////////////////////////////////
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// define
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// DMR Plus Module ID
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#define DMRPLUS_MODULE_ID 'B'
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////////////////////////////////////////////////////////////////////////////////////////
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// class
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class CDmrplusStreamCacheItem
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{
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public:
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CDmrplusStreamCacheItem() { m_uiSeqId = 0x77; }
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CDvHeaderPacket m_dvHeader;
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CDvFramePacket m_dvFrame0;
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CDvFramePacket m_dvFrame1;
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uint8_t m_uiSeqId;
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};
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class CDmrplusProtocol : 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 pytpe, 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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void SendBufferToClients(const CBuffer &, uint8_t);
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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 *, const CIp &);
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bool IsValidDisconnectPacket(const CBuffer &, CCallsign *, char *);
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bool IsValidDvHeaderPacket(const CIp &, const CBuffer &, std::unique_ptr<CDvHeaderPacket> &);
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bool IsValidDvFramePacket(const CIp &, const CBuffer &, std::array<std::unique_ptr<CDvFramePacket>, 3> &);
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// packet encoding helpers
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void EncodeConnectAckPacket(CBuffer *);
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void EncodeConnectNackPacket(CBuffer *);
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bool EncodeDMRPlusHeaderPacket(const CDvHeaderPacket &, CBuffer *) const;
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void EncodeDMRPlusPacket(const CDvHeaderPacket &, const CDvFramePacket &, const CDvFramePacket &, const CDvFramePacket &, uint8_t, CBuffer *) const;
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void SwapEndianess(uint8_t *, int) const;
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// dmr SeqId helper
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uint8_t GetNextSeqId(uint8_t) const;
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// dmr DstId to Module helper
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char DmrDstIdToModule(uint32_t) const;
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uint32_t ModuleToDmrDestId(char) const;
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// uiStreamId helpers
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uint32_t IpToStreamId(const CIp &) const;
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// Buffer & LC helpers
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void AppendVoiceLCToBuffer(CBuffer *, uint32_t) const;
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void AppendTerminatorLCToBuffer(CBuffer *, uint32_t) const;
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void ReplaceEMBInBuffer(CBuffer *, uint8_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, CDmrplusStreamCacheItem> m_StreamsCache;
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};
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