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simplify pruning of old ACK ranges

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This commit is contained in:
Marten Seemann 2020-02-20 18:49:22 +07:00
parent f317a471bb
commit a5fc72047e
11 changed files with 94 additions and 50 deletions
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29
internal/ackhandler/received_packet_handler_test.go
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@ -14,9 +14,12 @@ import (
var _ = Describe("Received Packet Handler", func() {
var handler ReceivedPacketHandler
var sentPackets *MockSentPacketTracker
BeforeEach(func() {
sentPackets = NewMockSentPacketTracker(mockCtrl)
handler = newReceivedPacketHandler(
sentPackets,
&congestion.RTTStats{},
utils.DefaultLogger,
protocol.VersionWhatever,
@ -24,6 +27,7 @@ var _ = Describe("Received Packet Handler", func() {
})
It("generates ACKs for different packet number spaces", func() {
sentPackets.EXPECT().GetLowestPacketNotConfirmedAcked().AnyTimes()
sendTime := time.Now().Add(-time.Second)
Expect(handler.ReceivedPacket(2, protocol.EncryptionInitial, sendTime, true)).To(Succeed())
Expect(handler.ReceivedPacket(1, protocol.EncryptionHandshake, sendTime, true)).To(Succeed())
@ -49,6 +53,7 @@ var _ = Describe("Received Packet Handler", func() {
})
It("uses the same packet number space for 0-RTT and 1-RTT packets", func() {
sentPackets.EXPECT().GetLowestPacketNotConfirmedAcked().AnyTimes()
sendTime := time.Now().Add(-time.Second)
Expect(handler.ReceivedPacket(2, protocol.Encryption0RTT, sendTime, true)).To(Succeed())
Expect(handler.ReceivedPacket(3, protocol.Encryption1RTT, sendTime, true)).To(Succeed())
@ -59,6 +64,7 @@ var _ = Describe("Received Packet Handler", func() {
})
It("rejects 0-RTT packets with higher packet numbers than 1-RTT packets", func() {
sentPackets.EXPECT().GetLowestPacketNotConfirmedAcked().AnyTimes()
sendTime := time.Now()
Expect(handler.ReceivedPacket(10, protocol.Encryption0RTT, sendTime, true)).To(Succeed())
Expect(handler.ReceivedPacket(11, protocol.Encryption1RTT, sendTime, true)).To(Succeed())
@ -66,6 +72,7 @@ var _ = Describe("Received Packet Handler", func() {
})
It("allows reordered 0-RTT packets", func() {
sentPackets.EXPECT().GetLowestPacketNotConfirmedAcked().AnyTimes()
sendTime := time.Now()
Expect(handler.ReceivedPacket(10, protocol.Encryption0RTT, sendTime, true)).To(Succeed())
Expect(handler.ReceivedPacket(12, protocol.Encryption1RTT, sendTime, true)).To(Succeed())
@ -83,6 +90,7 @@ var _ = Describe("Received Packet Handler", func() {
})
It("drops Handshake packets", func() {
sentPackets.EXPECT().GetLowestPacketNotConfirmedAcked().AnyTimes()
sendTime := time.Now().Add(-time.Second)
Expect(handler.ReceivedPacket(1, protocol.EncryptionHandshake, sendTime, true)).To(Succeed())
Expect(handler.ReceivedPacket(2, protocol.Encryption1RTT, sendTime, true)).To(Succeed())
@ -92,7 +100,26 @@ var _ = Describe("Received Packet Handler", func() {
Expect(handler.GetAckFrame(protocol.Encryption1RTT)).ToNot(BeNil())
})
It("does nothing when droping 0-RTT packets", func() {
It("does nothing when dropping 0-RTT packets", func() {
handler.DropPackets(protocol.Encryption0RTT)
})
It("drops old ACK ranges", func() {
sendTime := time.Now()
sentPackets.EXPECT().GetLowestPacketNotConfirmedAcked().Times(2)
Expect(handler.ReceivedPacket(1, protocol.Encryption1RTT, sendTime, true)).To(Succeed())
Expect(handler.ReceivedPacket(2, protocol.Encryption1RTT, sendTime, true)).To(Succeed())
ack := handler.GetAckFrame(protocol.Encryption1RTT)
Expect(ack).ToNot(BeNil())
Expect(ack.LowestAcked()).To(Equal(protocol.PacketNumber(1)))
Expect(ack.LargestAcked()).To(Equal(protocol.PacketNumber(2)))
sentPackets.EXPECT().GetLowestPacketNotConfirmedAcked()
Expect(handler.ReceivedPacket(3, protocol.Encryption1RTT, sendTime, true)).To(Succeed())
sentPackets.EXPECT().GetLowestPacketNotConfirmedAcked().Return(protocol.PacketNumber(2))
Expect(handler.ReceivedPacket(4, protocol.Encryption1RTT, sendTime, true)).To(Succeed())
ack = handler.GetAckFrame(protocol.Encryption1RTT)
Expect(ack).ToNot(BeNil())
Expect(ack.LowestAcked()).To(Equal(protocol.PacketNumber(2)))
Expect(ack.LargestAcked()).To(Equal(protocol.PacketNumber(4)))
})
})