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rename sentPacketHandler functions to match the recovery draft

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This commit is contained in:
Marten Seemann
2019-07-25 17:10:47 -04:00
parent 7a294f6a78
commit f150ed4d4e
6 changed files with 63 additions and 63 deletions
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4
internal/ackhandler/interfaces.go
View File

@@ -37,8 +37,8 @@ type SentPacketHandler interface {
PeekPacketNumber(protocol.EncryptionLevel) (protocol.PacketNumber, protocol.PacketNumberLen)
PopPacketNumber(protocol.EncryptionLevel) protocol.PacketNumber
GetAlarmTimeout() time.Time
OnAlarm() error
GetLossDetectionTimeout() time.Time
OnLossDetectionTimeout() error
// report some congestion statistics. For tracing only.
GetStats() *quictrace.TransportState

20
internal/ackhandler/sent_packet_handler.go
View File

@@ -136,7 +136,7 @@ func (h *sentPacketHandler) DropPackets(encLevel protocol.EncryptionLevel) {
func (h *sentPacketHandler) SentPacket(packet *Packet) {
if isAckEliciting := h.sentPacketImpl(packet); isAckEliciting {
h.getPacketNumberSpace(packet.EncryptionLevel).history.SentPacket(packet)
h.updateLossDetectionAlarm()
h.setLossDetectionTimer()
}
}
@@ -148,7 +148,7 @@ func (h *sentPacketHandler) SentPacketsAsRetransmission(packets []*Packet, retra
}
}
h.getPacketNumberSpace(p[0].EncryptionLevel).history.SentPacketsAsRetransmission(p, retransmissionOf)
h.updateLossDetectionAlarm()
h.setLossDetectionTimer()
}
func (h *sentPacketHandler) getPacketNumberSpace(encLevel protocol.EncryptionLevel) *packetNumberSpace {
@@ -258,7 +258,7 @@ func (h *sentPacketHandler) ReceivedAck(ackFrame *wire.AckFrame, withPacketNumbe
h.cryptoCount = 0
h.numProbesToSend = 0
h.updateLossDetectionAlarm()
h.setLossDetectionTimer()
return nil
}
@@ -329,7 +329,7 @@ func (h *sentPacketHandler) hasOutstandingPackets() bool {
return h.oneRTTPackets.history.HasOutstandingPackets() || h.hasOutstandingCryptoPackets()
}
func (h *sentPacketHandler) updateLossDetectionAlarm() {
func (h *sentPacketHandler) setLossDetectionTimer() {
// Cancel the alarm if no packets are outstanding
if !h.hasOutstandingPackets() {
h.alarm = time.Time{}
@@ -417,21 +417,21 @@ func (h *sentPacketHandler) detectLostPackets(
return nil
}
func (h *sentPacketHandler) OnAlarm() error {
func (h *sentPacketHandler) OnLossDetectionTimeout() error {
// When all outstanding are acknowledged, the alarm is canceled in
// updateLossDetectionAlarm. This doesn't reset the timer in the session though.
// When OnAlarm is called, we therefore need to make sure that there are
// actually packets outstanding.
if h.hasOutstandingPackets() {
if err := h.onVerifiedAlarm(); err != nil {
if err := h.onVerifiedLossDetectionTimeout(); err != nil {
return err
}
}
h.updateLossDetectionAlarm()
h.setLossDetectionTimer()
return nil
}
func (h *sentPacketHandler) onVerifiedAlarm() error {
func (h *sentPacketHandler) onVerifiedLossDetectionTimeout() error {
var err error
if h.hasOutstandingCryptoPackets() {
if h.logger.Debug() {
@@ -455,7 +455,7 @@ func (h *sentPacketHandler) onVerifiedAlarm() error {
return err
}
func (h *sentPacketHandler) GetAlarmTimeout() time.Time {
func (h *sentPacketHandler) GetLossDetectionTimeout() time.Time {
return h.alarm
}
@@ -672,7 +672,7 @@ func (h *sentPacketHandler) ResetForRetry() error {
h.retransmissionQueue = append(h.retransmissionQueue, p)
}
h.initialPackets = newPacketNumberSpace(h.initialPackets.pns.Pop())
h.updateLossDetectionAlarm()
h.setLossDetectionTimer()
return nil
}

64
internal/ackhandler/sent_packet_handler_test.go
View File

@@ -602,11 +602,11 @@ var _ = Describe("SentPacketHandler", func() {
ack := &wire.AckFrame{AckRanges: []wire.AckRange{{Smallest: 10, Largest: 11}}}
err := handler.ReceivedAck(ack, 1, protocol.Encryption1RTT, time.Now())
Expect(err).ToNot(HaveOccurred())
Expect(handler.GetAlarmTimeout()).To(BeZero())
Expect(handler.GetLossDetectionTimeout()).To(BeZero())
})
It("does nothing on OnAlarm if there are no outstanding packets", func() {
Expect(handler.OnAlarm()).To(Succeed())
Expect(handler.OnLossDetectionTimeout()).To(Succeed())
Expect(handler.SendMode()).To(Equal(SendAny))
})
@@ -614,19 +614,19 @@ var _ = Describe("SentPacketHandler", func() {
It("implements exponential backoff", func() {
sendTime := time.Now().Add(-time.Hour)
handler.SentPacket(ackElicitingPacket(&Packet{PacketNumber: 1, SendTime: sendTime}))
timeout := handler.GetAlarmTimeout().Sub(sendTime)
Expect(handler.GetAlarmTimeout().Sub(sendTime)).To(Equal(timeout))
timeout := handler.GetLossDetectionTimeout().Sub(sendTime)
Expect(handler.GetLossDetectionTimeout().Sub(sendTime)).To(Equal(timeout))
handler.ptoCount = 1
handler.updateLossDetectionAlarm()
Expect(handler.GetAlarmTimeout().Sub(sendTime)).To(Equal(2 * timeout))
handler.setLossDetectionTimer()
Expect(handler.GetLossDetectionTimeout().Sub(sendTime)).To(Equal(2 * timeout))
handler.ptoCount = 2
handler.updateLossDetectionAlarm()
Expect(handler.GetAlarmTimeout().Sub(sendTime)).To(Equal(4 * timeout))
handler.setLossDetectionTimer()
Expect(handler.GetLossDetectionTimeout().Sub(sendTime)).To(Equal(4 * timeout))
})
It("sets the TPO send mode until two packets is sent", func() {
handler.SentPacket(ackElicitingPacket(&Packet{PacketNumber: 1, SendTime: time.Now().Add(-time.Hour)}))
handler.OnAlarm()
handler.OnLossDetectionTimeout()
Expect(handler.SendMode()).To(Equal(SendPTO))
Expect(handler.ShouldSendNumPackets()).To(Equal(2))
handler.SentPacket(ackElicitingPacket(&Packet{PacketNumber: 2}))
@@ -637,7 +637,7 @@ var _ = Describe("SentPacketHandler", func() {
It("only counts ack-eliciting packets as probe packets", func() {
handler.SentPacket(ackElicitingPacket(&Packet{PacketNumber: 1, SendTime: time.Now().Add(-time.Hour)}))
handler.OnAlarm()
handler.OnLossDetectionTimeout()
Expect(handler.SendMode()).To(Equal(SendPTO))
Expect(handler.ShouldSendNumPackets()).To(Equal(2))
handler.SentPacket(ackElicitingPacket(&Packet{PacketNumber: 2}))
@@ -657,9 +657,9 @@ var _ = Describe("SentPacketHandler", func() {
updateRTT(time.Hour)
Expect(handler.lossTime.IsZero()).To(BeTrue())
handler.OnAlarm() // TLP
handler.OnAlarm() // TLP
handler.OnAlarm() // RTO
handler.OnLossDetectionTimeout() // TLP
handler.OnLossDetectionTimeout() // TLP
handler.OnLossDetectionTimeout() // RTO
p, err := handler.DequeueProbePacket()
Expect(err).ToNot(HaveOccurred())
Expect(p).ToNot(BeNil())
@@ -677,9 +677,9 @@ var _ = Describe("SentPacketHandler", func() {
handler.SentPacket(ackElicitingPacket(&Packet{PacketNumber: 1, SendTime: time.Now().Add(-time.Hour)}))
handler.SentPacket(ackElicitingPacket(&Packet{PacketNumber: 2, SendTime: time.Now().Add(-time.Hour)}))
handler.rttStats.UpdateRTT(time.Second, 0, time.Now())
handler.OnAlarm() // TLP
handler.OnAlarm() // TLP
handler.OnAlarm() // RTO
handler.OnLossDetectionTimeout() // TLP
handler.OnLossDetectionTimeout() // TLP
handler.OnLossDetectionTimeout() // RTO
_, err := handler.DequeueProbePacket()
Expect(err).ToNot(HaveOccurred())
_, err = handler.DequeueProbePacket()
@@ -700,7 +700,7 @@ var _ = Describe("SentPacketHandler", func() {
It("resets the send mode when it receives an acknowledgement after queueing probe packets", func() {
handler.SentPacket(ackElicitingPacket(&Packet{PacketNumber: 1, SendTime: time.Now().Add(-time.Hour)}))
handler.rttStats.UpdateRTT(time.Second, 0, time.Now())
handler.OnAlarm()
handler.OnLossDetectionTimeout()
Expect(handler.SendMode()).To(Equal(SendPTO))
ack := &wire.AckFrame{AckRanges: []wire.AckRange{{Smallest: 1, Largest: 1}}}
Expect(handler.ReceivedAck(ack, 1, protocol.Encryption1RTT, time.Now())).To(Succeed())
@@ -713,9 +713,9 @@ var _ = Describe("SentPacketHandler", func() {
handler.SentPacket(ackElicitingPacket(&Packet{PacketNumber: 3, SendTime: time.Now().Add(-time.Hour)}))
handler.SentPacket(ackElicitingPacket(&Packet{PacketNumber: 4, SendTime: time.Now().Add(-time.Hour)}))
handler.SentPacket(ackElicitingPacket(&Packet{PacketNumber: 5, SendTime: time.Now().Add(-time.Hour)}))
handler.OnAlarm() // TLP
handler.OnAlarm() // TLP
handler.OnAlarm() // RTO
handler.OnLossDetectionTimeout() // TLP
handler.OnLossDetectionTimeout() // TLP
handler.OnLossDetectionTimeout() // RTO
_, err := handler.DequeueProbePacket()
Expect(err).ToNot(HaveOccurred())
_, err = handler.DequeueProbePacket()
@@ -735,23 +735,23 @@ var _ = Describe("SentPacketHandler", func() {
It("handles ACKs for the original packet", func() {
handler.SentPacket(ackElicitingPacket(&Packet{PacketNumber: 5, SendTime: time.Now().Add(-time.Hour)}))
handler.rttStats.UpdateRTT(time.Second, 0, time.Now())
handler.OnAlarm() // TLP
handler.OnAlarm() // TLP
handler.OnAlarm() // RTO
handler.OnLossDetectionTimeout() // TLP
handler.OnLossDetectionTimeout() // TLP
handler.OnLossDetectionTimeout() // RTO
handler.SentPacketsAsRetransmission([]*Packet{ackElicitingPacket(&Packet{PacketNumber: 6})}, 5)
ack := &wire.AckFrame{AckRanges: []wire.AckRange{{Smallest: 5, Largest: 5}}}
err := handler.ReceivedAck(ack, 1, protocol.Encryption1RTT, time.Now())
Expect(err).ToNot(HaveOccurred())
err = handler.OnAlarm()
err = handler.OnLossDetectionTimeout()
Expect(err).ToNot(HaveOccurred())
})
It("handles ACKs for the original packet", func() {
handler.SentPacket(ackElicitingPacket(&Packet{PacketNumber: 5, SendTime: time.Now().Add(-time.Hour)}))
handler.rttStats.UpdateRTT(time.Second, 0, time.Now())
err := handler.OnAlarm()
err := handler.OnLossDetectionTimeout()
Expect(err).ToNot(HaveOccurred())
err = handler.OnAlarm()
err = handler.OnLossDetectionTimeout()
Expect(err).ToNot(HaveOccurred())
})
})
@@ -788,7 +788,7 @@ var _ = Describe("SentPacketHandler", func() {
Expect(handler.lossTime.IsZero()).To(BeFalse())
Expect(handler.lossTime.Sub(getPacket(1, protocol.Encryption1RTT).SendTime)).To(Equal(time.Second * 9 / 8))
Expect(handler.OnAlarm()).To(Succeed())
Expect(handler.OnLossDetectionTimeout()).To(Succeed())
Expect(handler.DequeuePacketForRetransmission()).NotTo(BeNil())
// make sure this is not an RTO: only packet 1 is retransmissted
Expect(handler.DequeuePacketForRetransmission()).To(BeNil())
@@ -811,16 +811,16 @@ var _ = Describe("SentPacketHandler", func() {
// RTT is now 1 minute
Expect(handler.rttStats.SmoothedRTT()).To(Equal(time.Minute))
Expect(handler.lossTime.IsZero()).To(BeTrue())
Expect(handler.GetAlarmTimeout().Sub(sendTime)).To(Equal(2 * time.Minute))
Expect(handler.GetLossDetectionTimeout().Sub(sendTime)).To(Equal(2 * time.Minute))
Expect(handler.OnAlarm()).To(Succeed())
Expect(handler.OnLossDetectionTimeout()).To(Succeed())
p := handler.DequeuePacketForRetransmission()
Expect(p).ToNot(BeNil())
Expect(p.PacketNumber).To(Equal(protocol.PacketNumber(3)))
Expect(handler.cryptoCount).To(BeEquivalentTo(1))
handler.SentPacket(cryptoPacket(&Packet{PacketNumber: 4, SendTime: lastCryptoPacketSendTime}))
// make sure the exponential backoff is used
Expect(handler.GetAlarmTimeout().Sub(lastCryptoPacketSendTime)).To(Equal(4 * time.Minute))
Expect(handler.GetLossDetectionTimeout().Sub(lastCryptoPacketSendTime)).To(Equal(4 * time.Minute))
})
It("rejects an ACK that acks packets with a higher encryption level", func() {
@@ -908,14 +908,14 @@ var _ = Describe("SentPacketHandler", func() {
Length: 100,
}
handler.SentPacket(packet)
Expect(handler.GetAlarmTimeout()).ToNot(BeZero())
Expect(handler.GetLossDetectionTimeout()).ToNot(BeZero())
Expect(handler.bytesInFlight).ToNot(BeZero())
Expect(handler.DequeuePacketForRetransmission()).To(BeNil())
Expect(handler.SendMode()).To(Equal(SendAny))
// now receive a Retry
Expect(handler.ResetForRetry()).To(Succeed())
Expect(handler.bytesInFlight).To(BeZero())
Expect(handler.GetAlarmTimeout()).To(BeZero())
Expect(handler.GetLossDetectionTimeout()).To(BeZero())
Expect(handler.SendMode()).To(Equal(SendRetransmission))
p := handler.DequeuePacketForRetransmission()
Expect(p.PacketNumber).To(Equal(packet.PacketNumber))