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only send one ACK for every 10 retransmittable packets

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This commit is contained in:
Marten Seemann 2018-01-28 17:59:37 +07:00
parent 96a31a51e5
commit fc5f54824a
2 changed files with 10 additions and 6 deletions
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14
ackhandler/received_packet_handler_test.go
View file

@ -95,13 +95,17 @@ var _ = Describe("receivedPacketHandler", func() {
Expect(handler.GetAlarmTimeout()).To(BeZero()) Expect(handler.GetAlarmTimeout()).To(BeZero())
}) })
It("queues an ACK for every second retransmittable packet, if they are arriving fast", func() { It("queues an ACK for every RetransmittablePacketsBeforeAck retransmittable packet, if they are arriving fast", func() {
receiveAndAck10Packets() receiveAndAck10Packets()
err := handler.ReceivedPacket(11, time.Time{}, true) p := protocol.PacketNumber(11)
Expect(err).ToNot(HaveOccurred()) for i := 0; i < protocol.RetransmittablePacketsBeforeAck-1; i++ {
Expect(handler.ackQueued).To(BeFalse()) err := handler.ReceivedPacket(p, time.Time{}, true)
Expect(err).ToNot(HaveOccurred())
Expect(handler.ackQueued).To(BeFalse())
p++
}
Expect(handler.GetAlarmTimeout()).NotTo(BeZero()) Expect(handler.GetAlarmTimeout()).NotTo(BeZero())
err = handler.ReceivedPacket(12, time.Time{}, true) err := handler.ReceivedPacket(p, time.Time{}, true)
Expect(err).ToNot(HaveOccurred()) Expect(err).ToNot(HaveOccurred())
Expect(handler.ackQueued).To(BeTrue()) Expect(handler.ackQueued).To(BeTrue())
Expect(handler.GetAlarmTimeout()).To(BeZero()) Expect(handler.GetAlarmTimeout()).To(BeZero())

2
internal/protocol/server_parameters.go
View file

@ -94,7 +94,7 @@ const MaxTrackedReceivedAckRanges = DefaultMaxCongestionWindow
const MaxNonRetransmittablePackets = 19 const MaxNonRetransmittablePackets = 19
// RetransmittablePacketsBeforeAck is the number of retransmittable that an ACK is sent for // RetransmittablePacketsBeforeAck is the number of retransmittable that an ACK is sent for
const RetransmittablePacketsBeforeAck = 2 const RetransmittablePacketsBeforeAck = 10
// MaxStreamFrameSorterGaps is the maximum number of gaps between received StreamFrames // MaxStreamFrameSorterGaps is the maximum number of gaps between received StreamFrames
// prevents DoS attacks against the streamFrameSorter // prevents DoS attacks against the streamFrameSorter