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96 lines
2.4 KiB
C++
96 lines
2.4 KiB
C++
#pragma once
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#include <llarp/crypto/types.hpp>
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#include <llarp/util/types.hpp>
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#include <llarp/crypto/encrypted_frame.hpp>
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#include <llarp/util/decaying_hashset.hpp>
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#include <llarp/messages/relay.hpp>
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#include <vector>
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#include <memory>
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struct llarp_buffer_t;
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namespace llarp
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{
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struct AbstractRouter;
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namespace routing
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{
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struct IMessage;
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}
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namespace path
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{
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struct IHopHandler
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{
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using TrafficEvent_t = std::pair<std::vector<byte_t>, TunnelNonce>;
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using TrafficQueue_t = std::list<TrafficEvent_t>;
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virtual ~IHopHandler() = default;
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virtual PathID_t
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RXID() const = 0;
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void
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DecayFilters(llarp_time_t now);
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virtual bool
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Expired(llarp_time_t now) const = 0;
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virtual bool
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ExpiresSoon(llarp_time_t now, llarp_time_t dlt) const = 0;
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/// send routing message and increment sequence number
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virtual bool
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SendRoutingMessage(const routing::IMessage& msg, AbstractRouter* r) = 0;
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// handle data in upstream direction
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virtual bool
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HandleUpstream(const llarp_buffer_t& X, const TunnelNonce& Y, AbstractRouter*);
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// handle data in downstream direction
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virtual bool
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HandleDownstream(const llarp_buffer_t& X, const TunnelNonce& Y, AbstractRouter*);
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/// return timestamp last remote activity happened at
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virtual llarp_time_t
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LastRemoteActivityAt() const = 0;
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virtual bool
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HandleLRSM(uint64_t status, std::array<EncryptedFrame, 8>& frames, AbstractRouter* r) = 0;
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uint64_t
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NextSeqNo()
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{
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return m_SequenceNum++;
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}
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virtual void
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FlushUpstream(AbstractRouter* r) = 0;
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virtual void
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FlushDownstream(AbstractRouter* r) = 0;
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protected:
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uint64_t m_SequenceNum = 0;
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TrafficQueue_t m_UpstreamQueue;
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TrafficQueue_t m_DownstreamQueue;
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util::DecayingHashSet<TunnelNonce> m_UpstreamReplayFilter;
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util::DecayingHashSet<TunnelNonce> m_DownstreamReplayFilter;
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virtual void
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UpstreamWork(TrafficQueue_t queue, AbstractRouter* r) = 0;
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virtual void
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DownstreamWork(TrafficQueue_t queue, AbstractRouter* r) = 0;
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virtual void
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HandleAllUpstream(std::vector<RelayUpstreamMessage> msgs, AbstractRouter* r) = 0;
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virtual void
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HandleAllDownstream(std::vector<RelayDownstreamMessage> msgs, AbstractRouter* r) = 0;
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};
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using HopHandler_ptr = std::shared_ptr<IHopHandler>;
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} // namespace path
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} // namespace llarp
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