mirror of
https://github.com/refraction-networking/uquic.git
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74 lines
3.4 KiB
Go
74 lines
3.4 KiB
Go
package protocol
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import "time"
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// MaxCongestionWindow is the maximum size of the CWND, in packets.
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// TODO: Unused?
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const MaxCongestionWindow PacketNumber = 200
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// DefaultMaxCongestionWindow is the default for the max congestion window
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// Taken from Chrome
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const DefaultMaxCongestionWindow PacketNumber = 107
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// InitialCongestionWindow is the initial congestion window in QUIC packets
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const InitialCongestionWindow PacketNumber = 32
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// MaxUndecryptablePackets limits the number of undecryptable packets that a
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// session queues for later until it sends a public reset.
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const MaxUndecryptablePackets = 10
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// AckSendDelay is the maximal time delay applied to packets containing only ACKs
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const AckSendDelay = 5 * time.Millisecond
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// ReceiveStreamFlowControlWindow is the stream-level flow control window for receiving data
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// This is the value that Google servers are using
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const ReceiveStreamFlowControlWindow ByteCount = (1 << 20) // 1 MB
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// ReceiveConnectionFlowControlWindow is the stream-level flow control window for receiving data
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// This is the value that Google servers are using
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const ReceiveConnectionFlowControlWindow ByteCount = (1 << 20) * 1.5 // 1.5 MB
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// MaxStreamsPerConnection is the maximum value accepted for the number of streams per connection
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const MaxStreamsPerConnection uint32 = 100
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// MaxStreamsMultiplier is the slack the client is allowed for the maximum number of streams per connection, needed e.g. when packets are out of order or dropped.
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const MaxStreamsMultiplier = 1.1
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// MaxIdleConnectionStateLifetime is the maximum value accepted for the idle connection state lifetime
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// TODO: set a reasonable value here
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const MaxIdleConnectionStateLifetime = 60 * time.Second
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// MaxSessionUnprocessedPackets is the max number of packets stored in each session that are not yet processed.
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const MaxSessionUnprocessedPackets = 128
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// RetransmissionThreshold + 1 is the number of times a packet has to be NACKed so that it gets retransmitted
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const RetransmissionThreshold uint8 = 3
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// SkipPacketAveragePeriodLength is the average period length in which one packet number is skipped to prevent an Optimistic ACK attack
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const SkipPacketAveragePeriodLength PacketNumber = 500
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// STKExpiryTimeSec is the valid time of a source address token in seconds
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const STKExpiryTimeSec = 24 * 60 * 60
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// MaxTrackedSentPackets is maximum number of sent packets saved for either later retransmission or entropy calculation
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// TODO: find a reasonable value here
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// TODO: decrease this value after dropping support for QUIC 33 and earlier
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const MaxTrackedSentPackets uint32 = 2000
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// MaxTrackedReceivedPackets is the maximum number of received packets saved for doing the entropy calculations
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// TODO: think about what to do with this when adding support for QUIC 34
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const MaxTrackedReceivedPackets uint32 = 2000
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// MaxStreamFrameSorterGaps is the maximum number of gaps between received StreamFrames
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// prevents DOS attacks against the streamFrameSorter
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const MaxStreamFrameSorterGaps = 50
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// CryptoMaxParams is the upper limit for the number of parameters in a crypto message.
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// Value taken from Chrome.
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const CryptoMaxParams = 128
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// CryptoParameterMaxLength is the upper limit for the length of a parameter in a crypto message.
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const CryptoParameterMaxLength = 2000
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// EphermalKeyLifetime is the lifetime of the ephermal key during the handshake, see handshake.getEphermalKEX.
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const EphermalKeyLifetime = time.Minute
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