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reset the PTO count before setting the timer when dropping a PN space

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This commit is contained in:
Marten Seemann 2020-07-08 11:51:56 +07:00
parent d4720e43c7
commit 743ba962aa
2 changed files with 17 additions and 5 deletions
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20
internal/ackhandler/sent_packet_handler_test.go
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@ -634,24 +634,36 @@ var _ = Describe("SentPacketHandler", func() {
It("resets the PTO mode and PTO count when a packet number space is dropped", func() {
handler.ReceivedPacket(protocol.EncryptionHandshake)
now := time.Now()
handler.rttStats.UpdateRTT(time.Second/2, 0, now)
Expect(handler.rttStats.SmoothedRTT()).To(Equal(time.Second / 2))
Expect(handler.rttStats.PTO(true)).To(And(
BeNumerically(">", time.Second),
BeNumerically("<", 2*time.Second),
))
sendTimeHandshake := now.Add(-2 * time.Minute)
sendTimeAppData := now.Add(-time.Minute)
handler.SentPacket(ackElicitingPacket(&Packet{
PacketNumber: 1,
EncryptionLevel: protocol.EncryptionHandshake,
SendTime: now.Add(-2 * time.Hour),
SendTime: sendTimeHandshake,
}))
handler.SentPacket(ackElicitingPacket(&Packet{
PacketNumber: 2,
SendTime: now.Add(-time.Hour),
SendTime: sendTimeAppData,
}))
// PTO timer based on the Handshake packet
Expect(handler.GetLossDetectionTimeout()).To(BeTemporally("~", now.Add(-2*time.Hour), time.Second))
Expect(handler.OnLossDetectionTimeout()).To(Succeed())
Expect(handler.ptoCount).To(BeEquivalentTo(1))
Expect(handler.SendMode()).To(Equal(SendPTOHandshake))
Expect(handler.GetLossDetectionTimeout()).To(Equal(sendTimeHandshake.Add(handler.rttStats.PTO(false) << 1)))
handler.SetHandshakeComplete()
handler.DropPackets(protocol.EncryptionHandshake)
// PTO timer based on the 1-RTT packet
Expect(handler.GetLossDetectionTimeout()).To(BeTemporally("~", now.Add(-time.Hour), time.Second))
Expect(handler.GetLossDetectionTimeout()).To(Equal(sendTimeAppData.Add(handler.rttStats.PTO(true)))) // no backoff. PTO count = 0
Expect(handler.SendMode()).ToNot(Equal(SendPTOHandshake))
Expect(handler.ptoCount).To(BeZero())
})