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reset the PTO when dropping a packet number space #2527

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merged 1 commit into from
May 5, 2020
Merged

reset the PTO when dropping a packet number space #2527

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1 change: 1 addition & 0 deletions internal/ackhandler/sent_packet_handler.go
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Original file line number Diff line number Diff line change
Expand Up @@ -164,6 +164,7 @@ func (h *sentPacketHandler) dropPackets(encLevel protocol.EncryptionLevel) {
h.qlogger.UpdatedPTOCount(0)
}
h.ptoCount = 0
h.numProbesToSend = 0
h.ptoMode = SendNone
}

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13 changes: 13 additions & 0 deletions internal/ackhandler/sent_packet_handler_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -966,6 +966,19 @@ var _ = Describe("SentPacketHandler", func() {
Expect(lostPackets).To(Equal([]protocol.PacketNumber{0, 1, 2, 3, 4, 5}))
Expect(handler.bytesInFlight).To(Equal(protocol.ByteCount(6)))
})

It("cancels the PTO when dropping a packet number space", func() {
now := time.Now()
handler.SentPacket(handshakePacket(&Packet{PacketNumber: 1, SendTime: now.Add(-time.Minute)}))
handler.SentPacket(handshakePacket(&Packet{PacketNumber: 2, SendTime: now.Add(-time.Minute)}))
Expect(handler.GetLossDetectionTimeout()).To(BeTemporally("~", now.Add(-time.Minute), time.Second))
Expect(handler.OnLossDetectionTimeout()).To(Succeed())
Expect(handler.SendMode()).To(Equal(SendPTOHandshake))
Expect(handler.ptoCount).To(BeEquivalentTo(1))
handler.DropPackets(protocol.EncryptionHandshake)
Expect(handler.ptoCount).To(BeZero())
Expect(handler.SendMode()).To(Equal(SendAny))
})
})

Context("peeking and popping packet number", func() {
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