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125 lines
4.1 KiB
125 lines
4.1 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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// frame type
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#define DMRMMDVM_FRAMETYPE_VOICE 0
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#define DMRMMDVM_FRAMETYPE_VOICESYNC 1
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#define DMRMMDVM_FRAMETYPE_DATASYNC 2
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// slot type
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#define MMDVM_SLOTTYPE_HEADER 1
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#define MMDVM_SLOTTYPE_TERMINATOR 2
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// DMRMMDVM Module ID
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#define MMDVM_MODULE_ID 'B'
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////////////////////////////////////////////////////////////////////////////////////////
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// class
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class CDmrmmdvmStreamCacheItem
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{
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public:
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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 CDmrmmdvmProtocol : 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 &, uint8_t, uint8_t);
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// packet decoding helpers
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bool IsValidConnectPacket(const CBuffer &, CCallsign *, const CIp &);
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bool IsValidAuthenticationPacket(const CBuffer &, CCallsign *, const CIp &);
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bool IsValidDisconnectPacket(const CBuffer &, CCallsign *);
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bool IsValidConfigPacket(const CBuffer &, CCallsign *, const CIp &);
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bool IsValidOptionPacket(const CBuffer &, CCallsign *);
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bool IsValidKeepAlivePacket(const CBuffer &, CCallsign *);
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bool IsValidRssiPacket(const CBuffer &, CCallsign *, int *);
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bool IsValidDvHeaderPacket(const CBuffer &, std::unique_ptr<CDvHeaderPacket> &, uint8_t *, uint8_t *);
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bool IsValidDvFramePacket(const CIp &, const CBuffer &, std::unique_ptr<CDvHeaderPacket> &, std::array<std::unique_ptr<CDvFramePacket>, 3> &);
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bool IsValidDvLastFramePacket(const CBuffer &, std::unique_ptr<CDvFramePacket> &);
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// packet encoding helpers
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void EncodeKeepAlivePacket(CBuffer *, std::shared_ptr<CClient>);
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void EncodeAckPacket(CBuffer *, const CCallsign &);
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void EncodeConnectAckPacket(CBuffer *, const CCallsign &, uint32_t);
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void EncodeNackPacket(CBuffer *, const CCallsign &);
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void EncodeClosePacket(CBuffer *, std::shared_ptr<CClient>);
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bool EncodeMMDVMHeaderPacket(const CDvHeaderPacket &, uint8_t, CBuffer *) const;
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void EncodeMMDVMPacket(const CDvHeaderPacket &, const CDvFramePacket &, const CDvFramePacket &, const CDvFramePacket &, uint8_t, CBuffer *) const;
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void EncodeLastMMDVMPacket(const CDvHeaderPacket &, uint8_t, CBuffer *) 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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// 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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void AppendDmrIdToBuffer(CBuffer *, uint32_t) const;
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void AppendDmrRptrIdToBuffer(CBuffer *, 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 stream id
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uint16_t m_uiStreamId;
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// for queue header caches
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std::unordered_map<char, CDmrmmdvmStreamCacheItem> m_StreamsCache;
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// for authentication
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uint32_t m_uiAuthSeed;
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// config data
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unsigned m_DefaultId;
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};
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