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protocol.go
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protocol.go
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package protocol
import (
"math"
)
// A PacketNumber in QUIC
type PacketNumber uint64
// PacketNumberLen is the length of the packet number in bytes
type PacketNumberLen uint8
const (
// PacketNumberLenInvalid is the default value and not a valid length for a packet number
PacketNumberLenInvalid PacketNumberLen = 0
// PacketNumberLen1 is a packet number length of 1 byte
PacketNumberLen1 PacketNumberLen = 1
// PacketNumberLen2 is a packet number length of 2 bytes
PacketNumberLen2 PacketNumberLen = 2
// PacketNumberLen4 is a packet number length of 4 bytes
PacketNumberLen4 PacketNumberLen = 4
// PacketNumberLen6 is a packet number length of 6 bytes
PacketNumberLen6 PacketNumberLen = 6
)
// A ConnectionID in QUIC
type ConnectionID uint64
// A StreamID in QUIC
type StreamID uint32
// A PathID in QUIC
type PathID uint8
// InitialPathID is the initial path id
const InitialPathID = 0
// A ByteCount in QUIC
type ByteCount uint64
// A Priority is a stream priority in QUIC
type Priority struct {
Dependency StreamID
Weight uint8
Exclusive bool
}
// MaxByteCount is the maximum value of a ByteCount
const MaxByteCount = ByteCount(math.MaxUint64)
// MaxReceivePacketSize maximum packet size of any QUIC packet, based on
// ethernet's max size, minus the IP and UDP headers. IPv6 has a 40 byte header,
// UDP adds an additional 8 bytes. This is a total overhead of 48 bytes.
// Ethernet's max packet size is 1500 bytes, 1500 - 48 = 1452.
const MaxReceivePacketSize ByteCount = 1452
// DefaultTCPMSS is the default maximum packet size used in the Linux TCP implementation.
// Used in QUIC for congestion window computations in bytes.
const DefaultTCPMSS ByteCount = 1460
// InitialStreamFlowControlWindow is the initial stream-level flow control window for sending
const InitialStreamFlowControlWindow ByteCount = (1 << 14) // 16 kB
// InitialConnectionFlowControlWindow is the initial connection-level flow control window for sending
const InitialConnectionFlowControlWindow ByteCount = (1 << 14) // 16 kB
// ClientHelloMinimumSize is the minimum size the server expects an inchoate CHLO to have.
const ClientHelloMinimumSize = 1024
// MaxClientHellos is the maximum number of times we'll send a client hello
// The value 3 accounts for:
// * one failure due to an incorrect or missing source-address token
// * one failure due the server's certificate chain being unavailible and the server being unwilling to send it without a valid source-address token
const MaxClientHellos = 3
// DefaultStreamWeight is the default stream weight
const DefaultStreamWeight uint8 = 15
// DefaultPathScheduler is the default path scheduler
const DefaultPathScheduler = "MultiPath"