73 lines
2.5 KiB
Go
73 lines
2.5 KiB
Go
package ackhandler
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import (
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"time"
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"github.com/lucas-clemente/quic-go/internal/protocol"
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"github.com/lucas-clemente/quic-go/internal/wire"
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)
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// A Packet is a packet
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type Packet struct {
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PacketNumber protocol.PacketNumber
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Frames []Frame
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LargestAcked protocol.PacketNumber // InvalidPacketNumber if the packet doesn't contain an ACK
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Length protocol.ByteCount
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EncryptionLevel protocol.EncryptionLevel
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SendTime time.Time
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IsPathMTUProbePacket bool // We don't report the loss of Path MTU probe packets to the congestion controller.
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includedInBytesInFlight bool
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declaredLost bool
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skippedPacket bool
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}
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func (p *Packet) outstanding() bool {
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return !p.declaredLost && !p.skippedPacket && !p.IsPathMTUProbePacket
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}
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// SentPacketHandler handles ACKs received for outgoing packets
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type SentPacketHandler interface {
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// SentPacket may modify the packet
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SentPacket(packet *Packet)
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ReceivedAck(ackFrame *wire.AckFrame, encLevel protocol.EncryptionLevel, recvTime time.Time) (bool /* 1-RTT packet acked */, error)
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ReceivedBytes(protocol.ByteCount)
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DropPackets(protocol.EncryptionLevel)
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ResetForRetry() error
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SetHandshakeConfirmed()
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// The SendMode determines if and what kind of packets can be sent.
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SendMode() SendMode
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// TimeUntilSend is the time when the next packet should be sent.
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// It is used for pacing packets.
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TimeUntilSend() time.Time
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// HasPacingBudget says if the pacer allows sending of a (full size) packet at this moment.
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HasPacingBudget() bool
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SetMaxDatagramSize(count protocol.ByteCount)
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// only to be called once the handshake is complete
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QueueProbePacket(protocol.EncryptionLevel) bool /* was a packet queued */
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PeekPacketNumber(protocol.EncryptionLevel) (protocol.PacketNumber, protocol.PacketNumberLen)
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PopPacketNumber(protocol.EncryptionLevel) protocol.PacketNumber
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GetLossDetectionTimeout() time.Time
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OnLossDetectionTimeout() error
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}
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type sentPacketTracker interface {
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GetLowestPacketNotConfirmedAcked() protocol.PacketNumber
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ReceivedPacket(protocol.EncryptionLevel)
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}
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// ReceivedPacketHandler handles ACKs needed to send for incoming packets
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type ReceivedPacketHandler interface {
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IsPotentiallyDuplicate(protocol.PacketNumber, protocol.EncryptionLevel) bool
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ReceivedPacket(pn protocol.PacketNumber, ecn protocol.ECN, encLevel protocol.EncryptionLevel, rcvTime time.Time, shouldInstigateAck bool) error
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DropPackets(protocol.EncryptionLevel)
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GetAlarmTimeout() time.Time
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GetAckFrame(encLevel protocol.EncryptionLevel, onlyIfQueued bool) *wire.AckFrame
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}
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