60 lines
2.2 KiB
Go
60 lines
2.2 KiB
Go
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package protocol
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import "math"
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// A PacketNumber in QUIC
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type PacketNumber uint64
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// PacketNumberLen is the length of the packet number in bytes
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type PacketNumberLen uint8
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const (
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// PacketNumberLenInvalid is the default value and not a valid length for a packet number
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PacketNumberLenInvalid PacketNumberLen = 0
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// PacketNumberLen1 is a packet number length of 1 byte
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PacketNumberLen1 PacketNumberLen = 1
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// PacketNumberLen2 is a packet number length of 2 bytes
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PacketNumberLen2 PacketNumberLen = 2
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// PacketNumberLen4 is a packet number length of 4 bytes
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PacketNumberLen4 PacketNumberLen = 4
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// PacketNumberLen6 is a packet number length of 6 bytes
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PacketNumberLen6 PacketNumberLen = 6
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)
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// A ConnectionID in QUIC
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type ConnectionID uint64
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// A StreamID in QUIC
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type StreamID uint32
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// A ByteCount in QUIC
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type ByteCount uint64
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// MaxByteCount is the maximum value of a ByteCount
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const MaxByteCount = math.MaxUint64
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// MaxReceivePacketSize maximum packet size of any QUIC packet, based on
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// ethernet's max size, minus the IP and UDP headers. IPv6 has a 40 byte header,
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// UDP adds an additional 8 bytes. This is a total overhead of 48 bytes.
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// Ethernet's max packet size is 1500 bytes, 1500 - 48 = 1452.
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const MaxReceivePacketSize ByteCount = 1452
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// DefaultTCPMSS is the default maximum packet size used in the Linux TCP implementation.
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// Used in QUIC for congestion window computations in bytes.
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const DefaultTCPMSS ByteCount = 1460
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// InitialStreamFlowControlWindow is the initial stream-level flow control window for sending
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const InitialStreamFlowControlWindow ByteCount = (1 << 14) // 16 kB
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// InitialConnectionFlowControlWindow is the initial connection-level flow control window for sending
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const InitialConnectionFlowControlWindow ByteCount = (1 << 14) // 16 kB
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// ClientHelloMinimumSize is the minimum size the server expects an inchoate CHLO to have.
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const ClientHelloMinimumSize = 1024
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// MaxClientHellos is the maximum number of times we'll send a client hello
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// The value 3 accounts for:
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// * one failure due to an incorrect or missing source-address token
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// * one failure due the server's certificate chain being unavailible and the server being unwilling to send it without a valid source-address token
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const MaxClientHellos = 3
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