mirror of
https://github.com/refraction-networking/uquic.git
synced 2025-04-04 20:57:36 +03:00
359 lines
13 KiB
Go
359 lines
13 KiB
Go
package quic
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import (
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"bytes"
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"time"
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"github.com/lucas-clemente/quic-go/ackhandler"
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"github.com/lucas-clemente/quic-go/crypto"
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"github.com/lucas-clemente/quic-go/frames"
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"github.com/lucas-clemente/quic-go/handshake"
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"github.com/lucas-clemente/quic-go/protocol"
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. "github.com/onsi/ginkgo"
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. "github.com/onsi/gomega"
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)
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type mockSentPacketHandler struct{}
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func (h *mockSentPacketHandler) SentPacket(packet *ackhandler.Packet) error {
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return nil
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}
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func (h *mockSentPacketHandler) ReceivedAck(ackFrame *frames.AckFrame) (time.Duration, []*ackhandler.Packet, []*ackhandler.Packet, error) {
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return 0, nil, nil, nil
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}
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func (h *mockSentPacketHandler) DequeuePacketForRetransmission() (packet *ackhandler.Packet) {
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return nil
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}
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func (h *mockSentPacketHandler) HasPacketForRetransmission() bool {
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return false
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}
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func (h *mockSentPacketHandler) BytesInFlight() protocol.ByteCount {
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return 0
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}
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func (h *mockSentPacketHandler) GetLargestObserved() protocol.PacketNumber {
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return 1
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}
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func newMockSentPacketHandler() ackhandler.SentPacketHandler {
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return &mockSentPacketHandler{}
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}
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var _ = Describe("Packet packer", func() {
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var (
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packer *packetPacker
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publicHeaderLen protocol.ByteCount
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)
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BeforeEach(func() {
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aead := &crypto.NullAEAD{}
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packer = &packetPacker{
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aead: aead,
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connectionParametersManager: handshake.NewConnectionParamatersManager(),
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sentPacketHandler: newMockSentPacketHandler(),
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}
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publicHeaderLen = 1 + 8 + 1 // 1 flag byte, 8 connection ID, 1 packet number
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})
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AfterEach(func() {
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packer.lastPacketNumber = 0
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})
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It("returns nil when no packet is queued", func() {
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p, err := packer.PackPacket(nil, []frames.Frame{}, true)
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Expect(p).To(BeNil())
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Expect(err).ToNot(HaveOccurred())
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})
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It("packs single packets", func() {
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f := frames.StreamFrame{
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StreamID: 5,
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Data: []byte{0xDE, 0xCA, 0xFB, 0xAD},
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}
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packer.AddStreamFrame(f)
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p, err := packer.PackPacket(nil, []frames.Frame{}, true)
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Expect(err).ToNot(HaveOccurred())
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Expect(p).ToNot(BeNil())
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b := &bytes.Buffer{}
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f.Write(b, 0)
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Expect(p.frames).To(HaveLen(1))
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Expect(p.raw).To(ContainSubstring(string(b.Bytes())))
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})
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It("does not pack stream frames if includeStreamFrames=false", func() {
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f := frames.StreamFrame{
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StreamID: 5,
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Data: []byte{0xDE, 0xCA, 0xFB, 0xAD},
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}
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packer.AddStreamFrame(f)
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p, err := packer.PackPacket(nil, []frames.Frame{}, false)
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Expect(err).ToNot(HaveOccurred())
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Expect(p).To(BeNil())
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})
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It("packs only control frames", func() {
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p, err := packer.PackPacket(nil, []frames.Frame{&frames.ConnectionCloseFrame{}}, false)
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Expect(p).ToNot(BeNil())
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Expect(err).ToNot(HaveOccurred())
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Expect(p.frames).To(HaveLen(1))
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Expect(p.raw).NotTo(BeEmpty())
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})
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It("packs a StopWaitingFrame first", func() {
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swf := &frames.StopWaitingFrame{LeastUnacked: 10}
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p, err := packer.PackPacket(swf, []frames.Frame{&frames.ConnectionCloseFrame{}}, false)
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Expect(err).ToNot(HaveOccurred())
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Expect(p).ToNot(BeNil())
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Expect(p.frames).To(HaveLen(2))
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Expect(p.frames[0]).To(Equal(swf))
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})
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It("sets the LeastUnackedDelta length of a StopWaitingFrame", func() {
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packetNumber := protocol.PacketNumber(0xDECAFB) // will result in a 4 byte packet number
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packer.lastPacketNumber = packetNumber - 1
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swf := &frames.StopWaitingFrame{LeastUnacked: packetNumber - 0x100}
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p, err := packer.PackPacket(swf, []frames.Frame{&frames.ConnectionCloseFrame{}}, false)
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Expect(err).ToNot(HaveOccurred())
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Expect(p.frames[0].(*frames.StopWaitingFrame).PacketNumberLen).To(Equal(protocol.PacketNumberLen4))
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})
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It("does not pack a packet containing only a StopWaitingFrame", func() {
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swf := &frames.StopWaitingFrame{LeastUnacked: 10}
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p, err := packer.PackPacket(swf, []frames.Frame{}, false)
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Expect(p).To(BeNil())
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Expect(err).ToNot(HaveOccurred())
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})
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It("packs many control frames into 1 packets", func() {
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f := &frames.AckFrame{LargestObserved: 1}
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b := &bytes.Buffer{}
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f.Write(b, 32)
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maxFramesPerPacket := int(protocol.MaxFrameAndPublicHeaderSize-publicHeaderLen) / b.Len()
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var controlFrames []frames.Frame
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for i := 0; i < maxFramesPerPacket; i++ {
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controlFrames = append(controlFrames, f)
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}
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packer.controlFrames = controlFrames
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payloadFrames, err := packer.composeNextPacket(nil, publicHeaderLen, true)
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Expect(err).ToNot(HaveOccurred())
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Expect(payloadFrames).To(HaveLen(maxFramesPerPacket))
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payloadFrames, err = packer.composeNextPacket(nil, publicHeaderLen, true)
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Expect(err).ToNot(HaveOccurred())
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Expect(payloadFrames).To(BeEmpty())
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})
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It("packs a lot of control frames into 2 packets if they don't fit into one", func() {
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blockedFrame := &frames.BlockedFrame{
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StreamID: 0x1337,
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}
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minLength, _ := blockedFrame.MinLength()
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maxFramesPerPacket := int(protocol.MaxFrameAndPublicHeaderSize-publicHeaderLen) / int(minLength)
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var controlFrames []frames.Frame
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for i := 0; i < maxFramesPerPacket+10; i++ {
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controlFrames = append(controlFrames, blockedFrame)
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}
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packer.controlFrames = controlFrames
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payloadFrames, err := packer.composeNextPacket(nil, publicHeaderLen, true)
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Expect(err).ToNot(HaveOccurred())
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Expect(payloadFrames).To(HaveLen(maxFramesPerPacket))
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payloadFrames, err = packer.composeNextPacket(nil, publicHeaderLen, true)
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Expect(err).ToNot(HaveOccurred())
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Expect(payloadFrames).To(HaveLen(10))
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})
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It("only increases the packet number when there is an actual packet to send", func() {
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f := frames.StreamFrame{
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StreamID: 5,
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Data: []byte{0xDE, 0xCA, 0xFB, 0xAD},
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}
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packer.AddStreamFrame(f)
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p, err := packer.PackPacket(nil, []frames.Frame{}, true)
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Expect(p).ToNot(BeNil())
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Expect(err).ToNot(HaveOccurred())
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Expect(packer.lastPacketNumber).To(Equal(protocol.PacketNumber(1)))
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p, err = packer.PackPacket(nil, []frames.Frame{}, true)
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Expect(p).To(BeNil())
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Expect(err).ToNot(HaveOccurred())
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Expect(packer.lastPacketNumber).To(Equal(protocol.PacketNumber(1)))
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packer.AddStreamFrame(f)
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p, err = packer.PackPacket(nil, []frames.Frame{}, true)
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Expect(p).ToNot(BeNil())
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Expect(err).ToNot(HaveOccurred())
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Expect(packer.lastPacketNumber).To(Equal(protocol.PacketNumber(2)))
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})
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Context("Stream Frame handling", func() {
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It("does not splits a stream frame with maximum size", func() {
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f := frames.StreamFrame{
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Offset: 1,
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DataLenPresent: false,
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}
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minLength, _ := f.MinLength()
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maxStreamFrameDataLen := protocol.MaxFrameAndPublicHeaderSize - publicHeaderLen - minLength
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f.Data = bytes.Repeat([]byte{'f'}, int(maxStreamFrameDataLen))
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packer.AddStreamFrame(f)
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payloadFrames, err := packer.composeNextPacket(nil, publicHeaderLen, true)
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Expect(err).ToNot(HaveOccurred())
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Expect(payloadFrames).To(HaveLen(1))
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Expect(payloadFrames[0].(*frames.StreamFrame).DataLenPresent).To(BeFalse())
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payloadFrames, err = packer.composeNextPacket(nil, publicHeaderLen, true)
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Expect(err).ToNot(HaveOccurred())
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Expect(payloadFrames).To(BeEmpty())
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})
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It("correctly handles a stream frame with one byte less than maximum size", func() {
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maxStreamFrameDataLen := protocol.MaxFrameAndPublicHeaderSize - publicHeaderLen - (1 + 1 + 2) - 1
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f1 := frames.StreamFrame{
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Data: bytes.Repeat([]byte{'f'}, int(maxStreamFrameDataLen)),
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Offset: 1,
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}
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f2 := frames.StreamFrame{
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Data: []byte("foobar"),
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Offset: 1,
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}
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packer.AddStreamFrame(f1)
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packer.AddStreamFrame(f2)
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p, err := packer.PackPacket(nil, []frames.Frame{}, true)
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Expect(err).ToNot(HaveOccurred())
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Expect(p.raw).To(HaveLen(int(protocol.MaxPacketSize - 1)))
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Expect(p.frames).To(HaveLen(1))
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Expect(p.frames[0].(*frames.StreamFrame).DataLenPresent).To(BeFalse())
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p, err = packer.PackPacket(nil, []frames.Frame{}, true)
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Expect(err).ToNot(HaveOccurred())
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Expect(p.frames[0].(*frames.StreamFrame).DataLenPresent).To(BeFalse())
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})
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It("packs multiple small stream frames into single packet", func() {
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f1 := frames.StreamFrame{
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StreamID: 5,
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Data: []byte{0xDE, 0xCA, 0xFB, 0xAD},
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}
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f2 := frames.StreamFrame{
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StreamID: 5,
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Data: []byte{0xBE, 0xEF, 0x13, 0x37},
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}
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f3 := frames.StreamFrame{
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StreamID: 3,
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Data: []byte{0xCA, 0xFE},
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}
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packer.AddStreamFrame(f1)
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packer.AddStreamFrame(f2)
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packer.AddStreamFrame(f3)
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p, err := packer.PackPacket(nil, []frames.Frame{}, true)
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Expect(p).ToNot(BeNil())
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Expect(err).ToNot(HaveOccurred())
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b := &bytes.Buffer{}
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f1.Write(b, 0)
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f2.Write(b, 0)
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f3.Write(b, 0)
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Expect(p.frames).To(HaveLen(3))
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Expect(p.frames[0].(*frames.StreamFrame).DataLenPresent).To(BeTrue())
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Expect(p.frames[1].(*frames.StreamFrame).DataLenPresent).To(BeTrue())
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Expect(p.frames[2].(*frames.StreamFrame).DataLenPresent).To(BeFalse())
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Expect(p.raw).To(ContainSubstring(string(f1.Data)))
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Expect(p.raw).To(ContainSubstring(string(f2.Data)))
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Expect(p.raw).To(ContainSubstring(string(f3.Data)))
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})
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It("splits one stream frame larger than maximum size", func() {
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f := frames.StreamFrame{
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StreamID: 7,
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Offset: 1,
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}
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minLength, _ := f.MinLength()
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maxStreamFrameDataLen := protocol.MaxFrameAndPublicHeaderSize - publicHeaderLen - minLength + 1 // + 1 since MinceLength is 1 bigger than the actual StreamFrame header
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f.Data = bytes.Repeat([]byte{'f'}, int(maxStreamFrameDataLen)+200)
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packer.AddStreamFrame(f)
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payloadFrames, err := packer.composeNextPacket(nil, publicHeaderLen, true)
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Expect(err).ToNot(HaveOccurred())
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Expect(payloadFrames).To(HaveLen(1))
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Expect(payloadFrames[0].(*frames.StreamFrame).DataLenPresent).To(BeFalse())
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Expect(payloadFrames[0].(*frames.StreamFrame).Data).To(HaveLen(int(maxStreamFrameDataLen)))
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payloadFrames, err = packer.composeNextPacket(nil, publicHeaderLen, true)
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Expect(err).ToNot(HaveOccurred())
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Expect(payloadFrames).To(HaveLen(1))
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Expect(payloadFrames[0].(*frames.StreamFrame).Data).To(HaveLen(200))
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Expect(payloadFrames[0].(*frames.StreamFrame).DataLenPresent).To(BeFalse())
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payloadFrames, err = packer.composeNextPacket(nil, publicHeaderLen, true)
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Expect(err).ToNot(HaveOccurred())
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Expect(payloadFrames).To(BeEmpty())
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})
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It("packs 2 stream frames that are too big for one packet correctly", func() {
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maxStreamFrameDataLen := protocol.MaxFrameAndPublicHeaderSize - publicHeaderLen - (1 + 1 + 2)
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f1 := frames.StreamFrame{
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Data: bytes.Repeat([]byte{'f'}, int(maxStreamFrameDataLen)+100),
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Offset: 1,
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}
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f2 := frames.StreamFrame{
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Data: bytes.Repeat([]byte{'f'}, int(maxStreamFrameDataLen)+100),
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Offset: 1,
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}
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packer.AddStreamFrame(f1)
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packer.AddStreamFrame(f2)
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p, err := packer.PackPacket(nil, []frames.Frame{}, true)
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Expect(err).ToNot(HaveOccurred())
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Expect(p.frames).To(HaveLen(1))
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Expect(p.frames[0].(*frames.StreamFrame).DataLenPresent).To(BeFalse())
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Expect(p.raw).To(HaveLen(int(protocol.MaxPacketSize)))
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p, err = packer.PackPacket(nil, []frames.Frame{}, true)
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Expect(p.frames).To(HaveLen(2))
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Expect(p.frames[0].(*frames.StreamFrame).DataLenPresent).To(BeTrue())
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Expect(p.frames[1].(*frames.StreamFrame).DataLenPresent).To(BeFalse())
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Expect(err).ToNot(HaveOccurred())
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Expect(p.raw).To(HaveLen(int(protocol.MaxPacketSize)))
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p, err = packer.PackPacket(nil, []frames.Frame{}, true)
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Expect(p.frames).To(HaveLen(1))
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Expect(p.frames[0].(*frames.StreamFrame).DataLenPresent).To(BeFalse())
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Expect(err).ToNot(HaveOccurred())
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Expect(p).ToNot(BeNil())
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p, err = packer.PackPacket(nil, []frames.Frame{}, true)
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Expect(err).ToNot(HaveOccurred())
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Expect(p).To(BeNil())
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})
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It("packs a packet that has the maximum packet size when given a large enough stream frame", func() {
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f := frames.StreamFrame{
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Offset: 1,
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}
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minLength, _ := f.MinLength()
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f.Data = bytes.Repeat([]byte{'f'}, int(protocol.MaxFrameAndPublicHeaderSize-publicHeaderLen-minLength+1)) // + 1 since MinceLength is 1 bigger than the actual StreamFrame header
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packer.AddStreamFrame(f)
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p, err := packer.PackPacket(nil, []frames.Frame{}, true)
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Expect(err).ToNot(HaveOccurred())
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Expect(p).ToNot(BeNil())
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Expect(p.raw).To(HaveLen(int(protocol.MaxPacketSize)))
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})
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It("splits a stream frame larger than the maximum size", func() {
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f := frames.StreamFrame{
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StreamID: 5,
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Offset: 1,
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}
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minLength, _ := f.MinLength()
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f.Data = bytes.Repeat([]byte{'f'}, int(protocol.MaxFrameAndPublicHeaderSize-publicHeaderLen-minLength+2)) // + 2 since MinceLength is 1 bigger than the actual StreamFrame header
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packer.AddStreamFrame(f)
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payloadFrames, err := packer.composeNextPacket(nil, publicHeaderLen, true)
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Expect(err).ToNot(HaveOccurred())
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Expect(payloadFrames).To(HaveLen(1))
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payloadFrames, err = packer.composeNextPacket(nil, publicHeaderLen, true)
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Expect(err).ToNot(HaveOccurred())
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Expect(payloadFrames).To(HaveLen(1))
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})
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})
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It("says whether it is empty", func() {
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Expect(packer.Empty()).To(BeTrue())
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f := frames.StreamFrame{
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StreamID: 5,
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Data: []byte{0xDE, 0xCA, 0xFB, 0xAD},
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}
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packer.AddStreamFrame(f)
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Expect(packer.Empty()).To(BeFalse())
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})
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})
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