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128 lines
2.9 KiB
C++
128 lines
2.9 KiB
C++
#pragma once
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#include <vector>
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#include <llarp/constants/link_layer.hpp>
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#include <llarp/link/session.hpp>
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#include <llarp/util/aligned.hpp>
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#include <llarp/util/buffer.hpp>
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#include <llarp/util/types.hpp>
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namespace llarp
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{
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namespace iwp
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{
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enum Command
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{
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/// keep alive message
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ePING = 0,
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/// begin transission
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eXMIT = 1,
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/// fragment data
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eDATA = 2,
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/// acknolege fragments
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eACKS = 3,
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/// negative ack
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eNACK = 4,
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/// multiack
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eMACK = 5,
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/// close session
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eCLOS = 0xff,
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};
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/// max size of data fragments
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static constexpr size_t FragmentSize = 1024;
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/// plaintext header overhead size
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static constexpr size_t CommandOverhead = 2;
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struct OutboundMessage
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{
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OutboundMessage() = default;
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OutboundMessage(
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uint64_t msgid,
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ILinkSession::Message_t data,
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llarp_time_t now,
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ILinkSession::CompletionHandler handler,
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uint16_t priority);
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ILinkSession::Message_t m_Data;
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uint64_t m_MsgID = 0;
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std::bitset<MAX_LINK_MSG_SIZE / FragmentSize> m_Acks;
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ILinkSession::CompletionHandler m_Completed;
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llarp_time_t m_LastFlush = 0s;
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ShortHash m_Digest;
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llarp_time_t m_StartedAt = 0s;
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uint16_t m_ResendPriority;
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bool
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operator<(const OutboundMessage& other) const
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{
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// yes, the first order is reversed as higher means more important
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// second part is for queue order
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int prioA = -m_ResendPriority, prioB = -other.m_ResendPriority;
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return std::tie(prioA, m_MsgID) < std::tie(prioB, other.m_MsgID);
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}
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ILinkSession::Packet_t
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XMIT() const;
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void
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Ack(byte_t bitmask);
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void
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FlushUnAcked(std::function<void(ILinkSession::Packet_t)> sendpkt, llarp_time_t now);
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bool
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ShouldFlush(llarp_time_t now) const;
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void
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Completed();
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bool
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IsTransmitted() const;
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bool
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IsTimedOut(llarp_time_t now) const;
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void
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InformTimeout();
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};
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struct InboundMessage
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{
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InboundMessage() = default;
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InboundMessage(uint64_t msgid, uint16_t sz, ShortHash h, llarp_time_t now);
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ILinkSession::Message_t m_Data;
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ShortHash m_Digset;
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uint64_t m_MsgID = 0;
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llarp_time_t m_LastACKSent = 0s;
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llarp_time_t m_LastActiveAt = 0s;
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std::bitset<MAX_LINK_MSG_SIZE / FragmentSize> m_Acks;
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void
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HandleData(uint16_t idx, const llarp_buffer_t& buf, llarp_time_t now);
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bool
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IsCompleted() const;
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bool
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IsTimedOut(llarp_time_t now) const;
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bool
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Verify() const;
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byte_t
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AcksBitmask() const;
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bool
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ShouldSendACKS(llarp_time_t now) const;
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void
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SendACKS(std::function<void(ILinkSession::Packet_t)> sendpkt, llarp_time_t now);
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ILinkSession::Packet_t
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ACKS() const;
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};
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} // namespace iwp
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} // namespace llarp
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