mirror of
https://github.com/refraction-networking/uquic.git
synced 2025-04-04 12:47:36 +03:00
96 lines
2.6 KiB
Go
96 lines
2.6 KiB
Go
package protocol
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import (
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"fmt"
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"time"
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)
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// The PacketType is the Long Header Type
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type PacketType uint8
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const (
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// PacketTypeInitial is the packet type of an Initial packet
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PacketTypeInitial PacketType = 1 + iota
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// PacketTypeRetry is the packet type of a Retry packet
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PacketTypeRetry
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// PacketTypeHandshake is the packet type of a Handshake packet
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PacketTypeHandshake
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// PacketType0RTT is the packet type of a 0-RTT packet
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PacketType0RTT
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)
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func (t PacketType) String() string {
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switch t {
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case PacketTypeInitial:
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return "Initial"
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case PacketTypeRetry:
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return "Retry"
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case PacketTypeHandshake:
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return "Handshake"
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case PacketType0RTT:
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return "0-RTT Protected"
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default:
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return fmt.Sprintf("unknown packet type: %d", t)
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}
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}
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// KeyPhase is the key phase
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type KeyPhase bool
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const (
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// KeyPhaseZero is key phase 0
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KeyPhaseZero KeyPhase = false
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// KeyPhaseOne is key phase 1
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KeyPhaseOne KeyPhase = true
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)
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func (p KeyPhase) String() string {
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if p == KeyPhaseZero {
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return "0"
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}
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return "1"
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}
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func (p KeyPhase) Next() KeyPhase {
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return !p
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}
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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 = ByteCount(1<<62 - 1)
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// An ApplicationErrorCode is an application-defined error code.
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type ApplicationErrorCode uint64
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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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// MinInitialPacketSize is the minimum size an Initial packet is required to have.
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const MinInitialPacketSize = 1200
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// MinStatelessResetSize is the minimum size of a stateless reset packet
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const MinStatelessResetSize = 1 /* first byte */ + 22 /* random bytes */ + 16 /* token */
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// MinConnectionIDLenInitial is the minimum length of the destination connection ID on an Initial packet.
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const MinConnectionIDLenInitial = 8
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// DefaultAckDelayExponent is the default ack delay exponent
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const DefaultAckDelayExponent = 3
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// MaxAckDelayExponent is the maximum ack delay exponent
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const MaxAckDelayExponent = 20
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// DefaultMaxAckDelay is the default max_ack_delay
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const DefaultMaxAckDelay = 25 * time.Millisecond
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// MaxMaxAckDelay is the maximum max_ack_delay
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const MaxMaxAckDelay = 1 << 14 * time.Millisecond
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