mirror of
https://github.com/refraction-networking/uquic.git
synced 2025-04-04 20:57:36 +03:00
895 lines
36 KiB
Go
895 lines
36 KiB
Go
package quic
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import (
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"bytes"
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"fmt"
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"math/rand"
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"net"
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"github.com/golang/mock/gomock"
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"github.com/lucas-clemente/quic-go/internal/ackhandler"
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"github.com/lucas-clemente/quic-go/internal/handshake"
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"github.com/lucas-clemente/quic-go/internal/mocks"
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"github.com/lucas-clemente/quic-go/internal/protocol"
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"github.com/lucas-clemente/quic-go/internal/wire"
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. "github.com/onsi/ginkgo"
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. "github.com/onsi/gomega"
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)
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var _ = Describe("Packet packer (legacy)", func() {
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const maxPacketSize protocol.ByteCount = 1357
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var (
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packer *packetPackerLegacy
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framer *MockFrameSource
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ackFramer *MockAckFrameSource
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cryptoStream *MockStreamI
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sealingManager *MockSealingManagerLegacy
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sealer *mocks.MockSealer
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divNonce []byte
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)
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expectAppendStreamFrames := func(frames ...wire.Frame) {
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framer.EXPECT().AppendStreamFrames(gomock.Any(), gomock.Any()).DoAndReturn(func(fs []wire.Frame, _ protocol.ByteCount) []wire.Frame {
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return append(fs, frames...)
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})
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}
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expectAppendControlFrames := func(frames ...wire.Frame) {
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framer.EXPECT().AppendControlFrames(gomock.Any(), gomock.Any()).DoAndReturn(func(fs []wire.Frame, _ protocol.ByteCount) ([]wire.Frame, protocol.ByteCount) {
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var length protocol.ByteCount
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for _, f := range frames {
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length += f.Length(packer.version)
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}
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return append(fs, frames...), length
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})
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}
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BeforeEach(func() {
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rand.Seed(GinkgoRandomSeed())
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version := versionGQUICFrames
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mockSender := NewMockStreamSender(mockCtrl)
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mockSender.EXPECT().onHasStreamData(gomock.Any()).AnyTimes()
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cryptoStream = NewMockStreamI(mockCtrl)
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framer = NewMockFrameSource(mockCtrl)
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ackFramer = NewMockAckFrameSource(mockCtrl)
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sealingManager = NewMockSealingManagerLegacy(mockCtrl)
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sealer = mocks.NewMockSealer(mockCtrl)
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sealer.EXPECT().Overhead().Return(9).AnyTimes()
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sealer.EXPECT().Seal(gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any()).DoAndReturn(func(dst, src []byte, pn protocol.PacketNumber, associatedData []byte) []byte {
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return append(src, bytes.Repeat([]byte{0}, 9)...)
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}).AnyTimes()
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divNonce = bytes.Repeat([]byte{'e'}, 32)
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packer = newPacketPackerLegacy(
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protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8},
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protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8},
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func(protocol.PacketNumber) protocol.PacketNumberLen { return protocol.PacketNumberLen2 },
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&net.TCPAddr{},
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divNonce,
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cryptoStream,
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sealingManager,
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framer,
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ackFramer,
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protocol.PerspectiveServer,
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version,
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)
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packer.hasSentPacket = true
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packer.version = version
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packer.maxPacketSize = maxPacketSize
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})
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It("returns nil when no packet is queued", func() {
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sealingManager.EXPECT().GetSealer().Return(protocol.EncryptionForwardSecure, sealer)
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ackFramer.EXPECT().GetAckFrame()
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cryptoStream.EXPECT().hasData()
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framer.EXPECT().AppendControlFrames(nil, gomock.Any())
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framer.EXPECT().AppendStreamFrames(nil, gomock.Any())
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p, err := packer.PackPacket()
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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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sealingManager.EXPECT().GetSealer().Return(protocol.EncryptionForwardSecure, sealer)
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cryptoStream.EXPECT().hasData()
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ackFramer.EXPECT().GetAckFrame()
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expectAppendControlFrames()
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f := &wire.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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expectAppendStreamFrames(f)
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p, err := packer.PackPacket()
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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, packer.version)
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Expect(p.frames).To(Equal([]wire.Frame{f}))
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Expect(p.raw).To(ContainSubstring(b.String()))
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})
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It("stores the encryption level a packet was sealed with", func() {
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sealingManager.EXPECT().GetSealer().Return(protocol.EncryptionForwardSecure, sealer)
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cryptoStream.EXPECT().hasData()
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ackFramer.EXPECT().GetAckFrame()
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expectAppendControlFrames()
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expectAppendStreamFrames(&wire.StreamFrame{
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StreamID: 5,
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Data: []byte("foobar"),
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})
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p, err := packer.PackPacket()
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Expect(err).ToNot(HaveOccurred())
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Expect(p.encryptionLevel).To(Equal(protocol.EncryptionForwardSecure))
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})
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Context("generating a packet header", func() {
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Context("Public Header", func() {
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It("doesn't set the source connection ID", func() {
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ph := packer.getHeader(protocol.EncryptionForwardSecure)
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Expect(ph.SrcConnectionID).To(BeEmpty())
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})
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It("it omits the connection ID for forward-secure packets", func() {
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packer.version = protocol.Version43
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ph := packer.getHeader(protocol.EncryptionForwardSecure)
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Expect(ph.DestConnectionID.Len()).ToNot(BeZero())
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packer.HandleTransportParameters(&handshake.TransportParameters{
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OmitConnectionID: true,
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})
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ph = packer.getHeader(protocol.EncryptionForwardSecure)
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Expect(ph.DestConnectionID.Len()).To(BeZero())
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})
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It("doesn't omit the connection ID for non-forward-secure packets", func() {
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packer.HandleTransportParameters(&handshake.TransportParameters{
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OmitConnectionID: true,
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})
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ph := packer.getHeader(protocol.EncryptionSecure)
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Expect(ph.DestConnectionID.Len()).ToNot(BeZero())
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})
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It("adds the Version Flag to the Public Header before the crypto handshake is finished", func() {
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packer.perspective = protocol.PerspectiveClient
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ph := packer.getHeader(protocol.EncryptionSecure)
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Expect(ph.VersionFlag).To(BeTrue())
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})
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It("doesn't add the Version Flag to the Public Header for forward-secure packets", func() {
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packer.perspective = protocol.PerspectiveClient
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ph := packer.getHeader(protocol.EncryptionForwardSecure)
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Expect(ph.VersionFlag).To(BeFalse())
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})
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Context("diversificaton nonces", func() {
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It("doesn't include a div nonce, when sending a packet with initial encryption", func() {
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ph := packer.getHeader(protocol.EncryptionUnencrypted)
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Expect(ph.DiversificationNonce).To(BeEmpty())
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})
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It("includes a div nonce, when sending a packet with secure encryption", func() {
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ph := packer.getHeader(protocol.EncryptionSecure)
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Expect(ph.DiversificationNonce).To(Equal(divNonce))
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})
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It("doesn't include a div nonce, when sending a packet with forward-secure encryption", func() {
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ph := packer.getHeader(protocol.EncryptionForwardSecure)
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Expect(ph.DiversificationNonce).To(BeEmpty())
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})
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It("doesn't send a div nonce as a client", func() {
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packer.perspective = protocol.PerspectiveClient
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ph := packer.getHeader(protocol.EncryptionSecure)
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Expect(ph.DiversificationNonce).To(BeEmpty())
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})
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})
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})
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Context("Header (for gQUIC 44)", func() {
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BeforeEach(func() {
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packer.version = protocol.Version44
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})
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It("sends an Initial packet as the first packets, for the client", func() {
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packer.perspective = protocol.PerspectiveClient
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packer.hasSentPacket = false
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h := packer.getHeader(protocol.EncryptionUnencrypted)
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Expect(h.IsLongHeader).To(BeTrue())
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Expect(h.Type).To(Equal(protocol.PacketTypeInitial))
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Expect(h.Version).To(Equal(protocol.Version44))
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Expect(h.DestConnectionID).To(Equal(packer.destConnID))
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Expect(h.SrcConnectionID).To(Equal(packer.srcConnID))
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Expect(h.PacketNumberLen).To(Equal(protocol.PacketNumberLen4))
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})
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It("sends a Handshake for non-forward-secure packets, for the server", func() {
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packer.perspective = protocol.PerspectiveServer
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h := packer.getHeader(protocol.EncryptionUnencrypted)
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Expect(h.IsLongHeader).To(BeTrue())
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Expect(h.Type).To(Equal(protocol.PacketTypeHandshake))
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Expect(h.Version).To(Equal(protocol.Version44))
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Expect(h.DestConnectionID).To(Equal(packer.destConnID))
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Expect(h.SrcConnectionID).To(Equal(packer.srcConnID))
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Expect(h.PacketNumberLen).To(Equal(protocol.PacketNumberLen4))
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})
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It("sets the Diversification Nonce for secure packets", func() {
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packer.perspective = protocol.PerspectiveServer
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Expect(divNonce).ToNot(BeEmpty())
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h := packer.getHeader(protocol.EncryptionSecure)
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Expect(h.IsLongHeader).To(BeTrue())
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Expect(h.Version).To(Equal(protocol.Version44))
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Expect(h.Type).To(Equal(protocol.PacketType0RTT))
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Expect(h.DiversificationNonce).To(Equal(divNonce))
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})
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It("uses the Short Header for forward-secure packets", func() {
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h := packer.getHeader(protocol.EncryptionForwardSecure)
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Expect(h.IsLongHeader).To(BeFalse())
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Expect(h.IsPublicHeader).To(BeFalse())
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Expect(h.DestConnectionID).To(Equal(packer.destConnID))
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})
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})
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})
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It("packs a CONNECTION_CLOSE", func() {
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ccf := wire.ConnectionCloseFrame{
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ErrorCode: 0x1337,
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ReasonPhrase: "foobar",
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}
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sealingManager.EXPECT().GetSealer().Return(protocol.EncryptionForwardSecure, sealer)
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p, err := packer.PackConnectionClose(&ccf)
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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]).To(Equal(&ccf))
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})
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It("doesn't send any other frames when sending a CONNECTION_CLOSE", func() {
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// expect no framer.PopStreamFrames
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ccf := &wire.ConnectionCloseFrame{
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ErrorCode: 0x1337,
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ReasonPhrase: "foobar",
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}
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sealingManager.EXPECT().GetSealer().Return(protocol.EncryptionForwardSecure, sealer)
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p, err := packer.PackConnectionClose(ccf)
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Expect(err).ToNot(HaveOccurred())
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Expect(p.frames).To(Equal([]wire.Frame{ccf}))
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})
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It("packs control frames", func() {
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sealingManager.EXPECT().GetSealer().Return(protocol.EncryptionForwardSecure, sealer)
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cryptoStream.EXPECT().hasData()
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ackFramer.EXPECT().GetAckFrame()
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frames := []wire.Frame{&wire.RstStreamFrame{}, &wire.MaxDataFrame{}}
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expectAppendControlFrames(frames...)
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expectAppendStreamFrames()
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p, err := packer.PackPacket()
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Expect(p).ToNot(BeNil())
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Expect(err).ToNot(HaveOccurred())
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Expect(p.frames).To(Equal(frames))
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Expect(p.raw).NotTo(BeEmpty())
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})
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It("increases the packet number", func() {
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sealingManager.EXPECT().GetSealer().Return(protocol.EncryptionForwardSecure, sealer).Times(2)
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cryptoStream.EXPECT().hasData().Times(2)
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ackFramer.EXPECT().GetAckFrame().Times(2)
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expectAppendControlFrames()
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expectAppendStreamFrames(&wire.StreamFrame{Data: []byte("foobar")})
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expectAppendControlFrames()
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expectAppendStreamFrames(&wire.StreamFrame{Data: []byte("raboof")})
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p1, err := packer.PackPacket()
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Expect(err).ToNot(HaveOccurred())
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Expect(p1).ToNot(BeNil())
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p2, err := packer.PackPacket()
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Expect(err).ToNot(HaveOccurred())
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Expect(p2).ToNot(BeNil())
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Expect(p2.header.PacketNumber).To(BeNumerically(">", p1.header.PacketNumber))
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})
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It("packs ACKs and STOP_WAITING frames first, then control frames, then STREAM frames", func() {
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sealingManager.EXPECT().GetSealer().Return(protocol.EncryptionForwardSecure, sealer)
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cryptoStream.EXPECT().hasData()
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ack := &wire.AckFrame{AckRanges: []wire.AckRange{{Largest: 100}}}
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swf := &wire.StopWaitingFrame{LeastUnacked: 10}
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mdf := &wire.MaxDataFrame{ByteOffset: 0x1234}
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sf := &wire.StreamFrame{Data: []byte("foobar")}
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ackFramer.EXPECT().GetAckFrame().Return(ack)
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ackFramer.EXPECT().GetStopWaitingFrame(false).Return(swf)
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expectAppendControlFrames(mdf)
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expectAppendStreamFrames(sf)
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packer.packetNumberGenerator.next = 15
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p, err := packer.PackPacket()
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Expect(err).ToNot(HaveOccurred())
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Expect(p).ToNot(BeNil())
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Expect(p.frames).To(Equal([]wire.Frame{ack, swf, mdf, sf}))
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})
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It("sets the LeastUnackedDelta length of a STOP_WAITING frame", func() {
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sealingManager.EXPECT().GetSealer().Return(protocol.EncryptionForwardSecure, sealer)
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cryptoStream.EXPECT().hasData()
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swf := &wire.StopWaitingFrame{LeastUnacked: 0x1337 - 0x100}
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ackFramer.EXPECT().GetAckFrame().Return(&wire.AckFrame{AckRanges: []wire.AckRange{{Largest: 100}}})
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ackFramer.EXPECT().GetStopWaitingFrame(false).Return(swf)
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expectAppendControlFrames()
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expectAppendStreamFrames()
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packer.packetNumberGenerator.next = 0x1337
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p, err := packer.PackPacket()
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Expect(err).ToNot(HaveOccurred())
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Expect(p.frames).To(HaveLen(2))
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Expect(p.frames[1].(*wire.StopWaitingFrame).PacketNumberLen).To(Equal(protocol.PacketNumberLen2))
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})
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It("refuses to send a packet that doesn't contain crypto stream data, if it has never sent a packet before", func() {
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cryptoStream.EXPECT().hasData()
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packer.hasSentPacket = false
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p, err := packer.PackPacket()
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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("accounts for the space consumed by control frames", func() {
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sealingManager.EXPECT().GetSealer().Return(protocol.EncryptionForwardSecure, sealer)
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cryptoStream.EXPECT().hasData()
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ackFramer.EXPECT().GetAckFrame()
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var maxSize protocol.ByteCount
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gomock.InOrder(
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framer.EXPECT().AppendControlFrames(gomock.Any(), gomock.Any()).DoAndReturn(func(fs []wire.Frame, maxLen protocol.ByteCount) ([]wire.Frame, protocol.ByteCount) {
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maxSize = maxLen
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return fs, 444
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}),
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framer.EXPECT().AppendStreamFrames(gomock.Any(), gomock.Any()).Do(func(_ []wire.Frame, maxLen protocol.ByteCount) []wire.Frame {
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Expect(maxLen).To(Equal(maxSize - 444 + 2 /* data length of the STREAM frame */))
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return nil
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}),
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)
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_, err := packer.PackPacket()
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Expect(err).ToNot(HaveOccurred())
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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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sealingManager.EXPECT().GetSealer().Return(protocol.EncryptionForwardSecure, sealer).Times(2)
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ackFramer.EXPECT().GetAckFrame().Times(2)
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cryptoStream.EXPECT().hasData().Times(2)
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expectAppendStreamFrames()
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expectAppendControlFrames()
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packer.packetNumberGenerator.nextToSkip = 1000
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p, err := packer.PackPacket()
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Expect(p).To(BeNil())
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Expect(err).ToNot(HaveOccurred())
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Expect(packer.packetNumberGenerator.Peek()).To(Equal(protocol.PacketNumber(1)))
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expectAppendControlFrames()
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expectAppendStreamFrames(&wire.StreamFrame{Data: []byte("foobar")})
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p, err = packer.PackPacket()
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Expect(err).ToNot(HaveOccurred())
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Expect(p).ToNot(BeNil())
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Expect(p.header.PacketNumber).To(Equal(protocol.PacketNumber(1)))
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Expect(packer.packetNumberGenerator.Peek()).To(Equal(protocol.PacketNumber(2)))
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})
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Context("making ACK packets retransmittable", func() {
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sendMaxNumNonRetransmittableAcks := func() {
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cryptoStream.EXPECT().hasData().Times(protocol.MaxNonRetransmittableAcks)
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for i := 0; i < protocol.MaxNonRetransmittableAcks; i++ {
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sealingManager.EXPECT().GetSealer().Return(protocol.EncryptionForwardSecure, sealer)
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ackFramer.EXPECT().GetAckFrame().Return(&wire.AckFrame{AckRanges: []wire.AckRange{{Smallest: 1, Largest: 1}}})
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ackFramer.EXPECT().GetStopWaitingFrame(false)
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expectAppendControlFrames()
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expectAppendStreamFrames()
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p, err := packer.PackPacket()
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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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}
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}
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It("adds a PING frame when it's supposed to send a retransmittable packet", func() {
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sendMaxNumNonRetransmittableAcks()
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sealingManager.EXPECT().GetSealer().Return(protocol.EncryptionForwardSecure, sealer)
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cryptoStream.EXPECT().hasData()
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ackFramer.EXPECT().GetAckFrame().Return(&wire.AckFrame{AckRanges: []wire.AckRange{{Smallest: 1, Largest: 1}}})
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ackFramer.EXPECT().GetStopWaitingFrame(false)
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expectAppendControlFrames()
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expectAppendStreamFrames()
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p, err := packer.PackPacket()
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Expect(p).ToNot(BeNil())
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Expect(err).ToNot(HaveOccurred())
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Expect(p.frames).To(ContainElement(&wire.PingFrame{}))
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// make sure the next packet doesn't contain another PING
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sealingManager.EXPECT().GetSealer().Return(protocol.EncryptionForwardSecure, sealer)
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cryptoStream.EXPECT().hasData()
|
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ackFramer.EXPECT().GetAckFrame().Return(&wire.AckFrame{AckRanges: []wire.AckRange{{Smallest: 1, Largest: 1}}})
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ackFramer.EXPECT().GetStopWaitingFrame(false)
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expectAppendControlFrames()
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expectAppendStreamFrames()
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p, err = packer.PackPacket()
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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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})
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|
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It("waits until there's something to send before adding a PING frame", func() {
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sendMaxNumNonRetransmittableAcks()
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// nothing to send
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sealingManager.EXPECT().GetSealer().Return(protocol.EncryptionForwardSecure, sealer)
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cryptoStream.EXPECT().hasData()
|
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expectAppendControlFrames()
|
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expectAppendStreamFrames()
|
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ackFramer.EXPECT().GetAckFrame()
|
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p, err := packer.PackPacket()
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Expect(err).ToNot(HaveOccurred())
|
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Expect(p).To(BeNil())
|
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// now add some frame to send
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expectAppendControlFrames()
|
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expectAppendStreamFrames()
|
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sealingManager.EXPECT().GetSealer().Return(protocol.EncryptionForwardSecure, sealer)
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cryptoStream.EXPECT().hasData()
|
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ackFramer.EXPECT().GetAckFrame().Return(&wire.AckFrame{AckRanges: []wire.AckRange{{Smallest: 1, Largest: 1}}})
|
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ackFramer.EXPECT().GetStopWaitingFrame(false)
|
|
p, err = packer.PackPacket()
|
|
Expect(err).ToNot(HaveOccurred())
|
|
Expect(p.frames).To(HaveLen(2))
|
|
Expect(p.frames).To(ContainElement(&wire.PingFrame{}))
|
|
})
|
|
|
|
It("doesn't send a PING if it already sent another retransmittable frame", func() {
|
|
sendMaxNumNonRetransmittableAcks()
|
|
sealingManager.EXPECT().GetSealer().Return(protocol.EncryptionForwardSecure, sealer)
|
|
cryptoStream.EXPECT().hasData()
|
|
ackFramer.EXPECT().GetAckFrame()
|
|
expectAppendStreamFrames()
|
|
expectAppendControlFrames(&wire.MaxDataFrame{})
|
|
p, err := packer.PackPacket()
|
|
Expect(p).ToNot(BeNil())
|
|
Expect(err).ToNot(HaveOccurred())
|
|
Expect(p.frames).ToNot(ContainElement(&wire.PingFrame{}))
|
|
})
|
|
})
|
|
|
|
Context("STREAM frame handling", func() {
|
|
It("does not split a STREAM frame with maximum size", func() {
|
|
cryptoStream.EXPECT().hasData()
|
|
ackFramer.EXPECT().GetAckFrame()
|
|
sealingManager.EXPECT().GetSealer().Return(protocol.EncryptionForwardSecure, sealer)
|
|
expectAppendControlFrames()
|
|
sf := &wire.StreamFrame{
|
|
Offset: 1,
|
|
StreamID: 5,
|
|
DataLenPresent: true,
|
|
}
|
|
framer.EXPECT().AppendStreamFrames(gomock.Any(), gomock.Any()).DoAndReturn(func(_ []wire.Frame, maxSize protocol.ByteCount) ([]wire.Frame, protocol.ByteCount) {
|
|
sf.Data = bytes.Repeat([]byte{'f'}, int(maxSize-sf.Length(packer.version)))
|
|
return []wire.Frame{sf}, sf.Length(packer.version)
|
|
})
|
|
p, err := packer.PackPacket()
|
|
Expect(err).ToNot(HaveOccurred())
|
|
Expect(p.frames).To(HaveLen(1))
|
|
Expect(p.raw).To(HaveLen(int(maxPacketSize)))
|
|
Expect(p.frames[0].(*wire.StreamFrame).Data).To(HaveLen(len(sf.Data)))
|
|
Expect(p.frames[0].(*wire.StreamFrame).DataLenPresent).To(BeFalse())
|
|
})
|
|
|
|
It("packs multiple small STREAM frames into single packet", func() {
|
|
f1 := &wire.StreamFrame{
|
|
StreamID: 5,
|
|
Data: []byte("frame 1"),
|
|
DataLenPresent: true,
|
|
}
|
|
f2 := &wire.StreamFrame{
|
|
StreamID: 5,
|
|
Data: []byte("frame 2"),
|
|
DataLenPresent: true,
|
|
}
|
|
f3 := &wire.StreamFrame{
|
|
StreamID: 3,
|
|
Data: []byte("frame 3"),
|
|
DataLenPresent: true,
|
|
}
|
|
cryptoStream.EXPECT().hasData()
|
|
sealingManager.EXPECT().GetSealer().Return(protocol.EncryptionForwardSecure, sealer)
|
|
ackFramer.EXPECT().GetAckFrame()
|
|
expectAppendControlFrames()
|
|
expectAppendStreamFrames(f1, f2, f3)
|
|
p, err := packer.PackPacket()
|
|
Expect(p).ToNot(BeNil())
|
|
Expect(err).ToNot(HaveOccurred())
|
|
Expect(p.frames).To(HaveLen(3))
|
|
Expect(p.frames[0].(*wire.StreamFrame).Data).To(Equal([]byte("frame 1")))
|
|
Expect(p.frames[0].(*wire.StreamFrame).DataLenPresent).To(BeTrue())
|
|
Expect(p.frames[1].(*wire.StreamFrame).Data).To(Equal([]byte("frame 2")))
|
|
Expect(p.frames[1].(*wire.StreamFrame).DataLenPresent).To(BeTrue())
|
|
Expect(p.frames[2].(*wire.StreamFrame).Data).To(Equal([]byte("frame 3")))
|
|
Expect(p.frames[2].(*wire.StreamFrame).DataLenPresent).To(BeFalse())
|
|
})
|
|
|
|
It("refuses to send unencrypted stream data on a data stream", func() {
|
|
sealingManager.EXPECT().GetSealer().Return(protocol.EncryptionUnencrypted, sealer)
|
|
cryptoStream.EXPECT().hasData()
|
|
ackFramer.EXPECT().GetAckFrame()
|
|
expectAppendControlFrames()
|
|
// don't expect a call to framer.PopStreamFrames
|
|
p, err := packer.PackPacket()
|
|
Expect(err).NotTo(HaveOccurred())
|
|
Expect(p).To(BeNil())
|
|
})
|
|
|
|
It("sends non forward-secure data as the client", func() {
|
|
sealingManager.EXPECT().GetSealer().Return(protocol.EncryptionSecure, sealer)
|
|
cryptoStream.EXPECT().hasData()
|
|
ackFramer.EXPECT().GetAckFrame()
|
|
expectAppendControlFrames()
|
|
f := &wire.StreamFrame{
|
|
StreamID: 5,
|
|
Data: []byte("foobar"),
|
|
}
|
|
expectAppendStreamFrames(f)
|
|
packer.perspective = protocol.PerspectiveClient
|
|
p, err := packer.PackPacket()
|
|
Expect(err).ToNot(HaveOccurred())
|
|
Expect(p.encryptionLevel).To(Equal(protocol.EncryptionSecure))
|
|
Expect(p.frames).To(Equal([]wire.Frame{f}))
|
|
})
|
|
|
|
It("does not send non forward-secure data as the server", func() {
|
|
sealingManager.EXPECT().GetSealer().Return(protocol.EncryptionSecure, sealer)
|
|
cryptoStream.EXPECT().hasData()
|
|
ackFramer.EXPECT().GetAckFrame()
|
|
expectAppendControlFrames()
|
|
// don't expect a call to framer.PopStreamFrames
|
|
p, err := packer.PackPacket()
|
|
Expect(err).ToNot(HaveOccurred())
|
|
Expect(p).To(BeNil())
|
|
})
|
|
|
|
It("sends unencrypted stream data on the crypto stream", func() {
|
|
sealingManager.EXPECT().GetSealerForCryptoStream().Return(protocol.EncryptionUnencrypted, sealer)
|
|
f := &wire.StreamFrame{
|
|
StreamID: 1,
|
|
Data: []byte("foobar"),
|
|
}
|
|
cryptoStream.EXPECT().hasData().Return(true)
|
|
cryptoStream.EXPECT().popStreamFrame(gomock.Any()).Return(f, false)
|
|
p, err := packer.PackPacket()
|
|
Expect(err).ToNot(HaveOccurred())
|
|
Expect(p.frames).To(Equal([]wire.Frame{f}))
|
|
Expect(p.encryptionLevel).To(Equal(protocol.EncryptionUnencrypted))
|
|
})
|
|
|
|
It("sends encrypted stream data on the crypto stream", func() {
|
|
sealingManager.EXPECT().GetSealerForCryptoStream().Return(protocol.EncryptionSecure, sealer)
|
|
f := &wire.StreamFrame{
|
|
StreamID: 1,
|
|
Data: []byte("foobar"),
|
|
}
|
|
cryptoStream.EXPECT().hasData().Return(true)
|
|
cryptoStream.EXPECT().popStreamFrame(gomock.Any()).Return(f, false)
|
|
p, err := packer.PackPacket()
|
|
Expect(err).ToNot(HaveOccurred())
|
|
Expect(p.frames).To(Equal([]wire.Frame{f}))
|
|
Expect(p.encryptionLevel).To(Equal(protocol.EncryptionSecure))
|
|
})
|
|
|
|
It("does not pack STREAM frames if not allowed", func() {
|
|
sealingManager.EXPECT().GetSealer().Return(protocol.EncryptionUnencrypted, sealer)
|
|
cryptoStream.EXPECT().hasData()
|
|
ack := &wire.AckFrame{AckRanges: []wire.AckRange{{Largest: 10, Smallest: 1}}}
|
|
ackFramer.EXPECT().GetAckFrame().Return(ack)
|
|
ackFramer.EXPECT().GetStopWaitingFrame(false)
|
|
expectAppendControlFrames()
|
|
// don't expect a call to framer.PopStreamFrames
|
|
p, err := packer.PackPacket()
|
|
Expect(err).ToNot(HaveOccurred())
|
|
Expect(p.frames).To(Equal([]wire.Frame{ack}))
|
|
})
|
|
})
|
|
|
|
It("packs a single ACK", func() {
|
|
cryptoStream.EXPECT().hasData()
|
|
sealingManager.EXPECT().GetSealer().Return(protocol.EncryptionForwardSecure, sealer)
|
|
ack := &wire.AckFrame{AckRanges: []wire.AckRange{{Largest: 42, Smallest: 1}}}
|
|
ackFramer.EXPECT().GetAckFrame().Return(ack)
|
|
ackFramer.EXPECT().GetStopWaitingFrame(false)
|
|
expectAppendControlFrames()
|
|
expectAppendStreamFrames()
|
|
p, err := packer.PackPacket()
|
|
Expect(err).NotTo(HaveOccurred())
|
|
Expect(p).ToNot(BeNil())
|
|
Expect(p.frames[0]).To(Equal(ack))
|
|
})
|
|
|
|
Context("retransmitting of handshake packets", func() {
|
|
sf := &wire.StreamFrame{
|
|
StreamID: 1,
|
|
Data: []byte("foobar"),
|
|
}
|
|
|
|
It("packs a retransmission with the right encryption level", func() {
|
|
sealingManager.EXPECT().GetSealerWithEncryptionLevel(protocol.EncryptionUnencrypted).Return(sealer, nil)
|
|
swf := &wire.StopWaitingFrame{LeastUnacked: 1}
|
|
ackFramer.EXPECT().GetStopWaitingFrame(true).Return(swf)
|
|
packet := &ackhandler.Packet{
|
|
PacketType: protocol.PacketTypeHandshake,
|
|
EncryptionLevel: protocol.EncryptionUnencrypted,
|
|
Frames: []wire.Frame{sf},
|
|
}
|
|
p, err := packer.PackRetransmission(packet)
|
|
Expect(err).ToNot(HaveOccurred())
|
|
Expect(p).To(HaveLen(1))
|
|
Expect(p[0].header.Type).To(Equal(protocol.PacketTypeHandshake))
|
|
Expect(p[0].frames).To(Equal([]wire.Frame{swf, sf}))
|
|
Expect(p[0].encryptionLevel).To(Equal(protocol.EncryptionUnencrypted))
|
|
})
|
|
|
|
It("packs a retransmission for a packet sent with secure encryption", func() {
|
|
sealingManager.EXPECT().GetSealerWithEncryptionLevel(protocol.EncryptionSecure).Return(sealer, nil)
|
|
swf := &wire.StopWaitingFrame{LeastUnacked: 1}
|
|
ackFramer.EXPECT().GetStopWaitingFrame(true).Return(swf)
|
|
packet := &ackhandler.Packet{
|
|
EncryptionLevel: protocol.EncryptionSecure,
|
|
Frames: []wire.Frame{sf},
|
|
}
|
|
p, err := packer.PackRetransmission(packet)
|
|
Expect(err).ToNot(HaveOccurred())
|
|
Expect(p).To(HaveLen(1))
|
|
Expect(p[0].frames).To(Equal([]wire.Frame{swf, sf}))
|
|
Expect(p[0].encryptionLevel).To(Equal(protocol.EncryptionSecure))
|
|
// a packet sent by the server with secure encryption contains the SHLO
|
|
// it needs to have a diversification nonce
|
|
Expect(p[0].raw).To(ContainSubstring(string(divNonce)))
|
|
})
|
|
|
|
// this should never happen, since non forward-secure packets are limited to a size smaller than MaxPacketSize, such that it is always possible to retransmit them without splitting the StreamFrame
|
|
// (note that the retransmitted packet needs to have enough space for the StopWaitingFrame)
|
|
It("refuses to send a packet larger than MaxPacketSize", func() {
|
|
sealingManager.EXPECT().GetSealerWithEncryptionLevel(gomock.Any()).Return(sealer, nil)
|
|
swf := &wire.StopWaitingFrame{LeastUnacked: 1}
|
|
ackFramer.EXPECT().GetStopWaitingFrame(true).Return(swf)
|
|
packet := &ackhandler.Packet{
|
|
EncryptionLevel: protocol.EncryptionSecure,
|
|
Frames: []wire.Frame{
|
|
&wire.StreamFrame{
|
|
StreamID: 1,
|
|
Data: bytes.Repeat([]byte{'f'}, int(maxPacketSize-5)),
|
|
},
|
|
},
|
|
}
|
|
_, err := packer.PackRetransmission(packet)
|
|
Expect(err).To(HaveOccurred())
|
|
Expect(err.Error()).To(ContainSubstring("PacketPacker BUG: packet too large"))
|
|
})
|
|
|
|
It("packs a retransmission for an Initial packet", func() {
|
|
sealingManager.EXPECT().GetSealerWithEncryptionLevel(protocol.EncryptionUnencrypted).Return(sealer, nil)
|
|
packer.version = protocol.Version44
|
|
packer.perspective = protocol.PerspectiveClient
|
|
packet := &ackhandler.Packet{
|
|
PacketType: protocol.PacketTypeInitial,
|
|
EncryptionLevel: protocol.EncryptionUnencrypted,
|
|
Frames: []wire.Frame{sf},
|
|
}
|
|
p, err := packer.PackRetransmission(packet)
|
|
Expect(err).ToNot(HaveOccurred())
|
|
Expect(p).To(HaveLen(1))
|
|
Expect(p[0].frames).To(Equal([]wire.Frame{sf}))
|
|
Expect(p[0].encryptionLevel).To(Equal(protocol.EncryptionUnencrypted))
|
|
Expect(p[0].header.Type).To(Equal(protocol.PacketTypeInitial))
|
|
})
|
|
})
|
|
|
|
Context("retransmission of forward-secure packets", func() {
|
|
It("retransmits a small packet", func() {
|
|
swf := &wire.StopWaitingFrame{LeastUnacked: 7}
|
|
packer.packetNumberGenerator.next = 10
|
|
sealingManager.EXPECT().GetSealer().Return(protocol.EncryptionForwardSecure, sealer)
|
|
ackFramer.EXPECT().GetStopWaitingFrame(true).Return(swf)
|
|
frames := []wire.Frame{
|
|
&wire.MaxDataFrame{ByteOffset: 0x1234},
|
|
&wire.StreamFrame{StreamID: 42, Data: []byte("foobar")},
|
|
}
|
|
packets, err := packer.PackRetransmission(&ackhandler.Packet{
|
|
EncryptionLevel: protocol.EncryptionForwardSecure,
|
|
Frames: frames,
|
|
})
|
|
Expect(err).ToNot(HaveOccurred())
|
|
Expect(packets).To(HaveLen(1))
|
|
p := packets[0]
|
|
Expect(p.encryptionLevel).To(Equal(protocol.EncryptionForwardSecure))
|
|
Expect(p.frames).To(HaveLen(3))
|
|
Expect(p.frames[0]).To(BeAssignableToTypeOf(&wire.StopWaitingFrame{}))
|
|
Expect(p.frames[0].(*wire.StopWaitingFrame).LeastUnacked).To(Equal(protocol.PacketNumber(7)))
|
|
Expect(p.frames[0].(*wire.StopWaitingFrame).PacketNumber).To(Equal(p.header.PacketNumber))
|
|
Expect(p.frames[0].(*wire.StopWaitingFrame).PacketNumberLen).To(Equal(p.header.PacketNumberLen))
|
|
Expect(p.frames[1:]).To(Equal(frames))
|
|
})
|
|
|
|
It("packs two packets for retransmission if the original packet contained many control frames", func() {
|
|
sealingManager.EXPECT().GetSealer().Return(protocol.EncryptionForwardSecure, sealer)
|
|
var frames []wire.Frame
|
|
var totalLen protocol.ByteCount
|
|
// pack a bunch of control frames, such that the packet is way bigger than a single packet
|
|
for i := 0; totalLen < maxPacketSize*3/2; i++ {
|
|
f := &wire.MaxStreamDataFrame{
|
|
StreamID: protocol.StreamID(i),
|
|
ByteOffset: protocol.ByteCount(i),
|
|
}
|
|
frames = append(frames, f)
|
|
totalLen += f.Length(packer.version)
|
|
}
|
|
packer.packetNumberGenerator.next = 10
|
|
swf := &wire.StopWaitingFrame{LeastUnacked: 7}
|
|
ackFramer.EXPECT().GetStopWaitingFrame(true).Return(swf)
|
|
packets, err := packer.PackRetransmission(&ackhandler.Packet{
|
|
EncryptionLevel: protocol.EncryptionForwardSecure,
|
|
Frames: frames,
|
|
})
|
|
Expect(err).ToNot(HaveOccurred())
|
|
Expect(packets).To(HaveLen(2))
|
|
Expect(len(packets[0].frames) + len(packets[1].frames)).To(Equal(len(frames) + 2)) // all frames, plus 2 STOP_WAITING frames
|
|
Expect(packets[0].frames[0]).To(BeAssignableToTypeOf(&wire.StopWaitingFrame{}))
|
|
Expect(packets[1].frames[0]).To(BeAssignableToTypeOf(&wire.StopWaitingFrame{}))
|
|
Expect(packets[0].frames[1:]).To(Equal(frames[:len(packets[0].frames)-1]))
|
|
Expect(packets[1].frames[1:]).To(Equal(frames[len(packets[0].frames)-1:]))
|
|
// check that the first packet was filled up as far as possible:
|
|
// if the first frame (after the STOP_WAITING) was packed into the first packet, it would have overflown the MaxPacketSize
|
|
Expect(len(packets[0].raw) + int(packets[1].frames[1].Length(packer.version))).To(BeNumerically(">", maxPacketSize))
|
|
})
|
|
|
|
It("splits a STREAM frame that doesn't fit", func() {
|
|
sealingManager.EXPECT().GetSealer().Return(protocol.EncryptionForwardSecure, sealer)
|
|
swf := &wire.StopWaitingFrame{}
|
|
ackFramer.EXPECT().GetStopWaitingFrame(true).Return(swf)
|
|
packets, err := packer.PackRetransmission(&ackhandler.Packet{
|
|
EncryptionLevel: protocol.EncryptionForwardSecure,
|
|
Frames: []wire.Frame{&wire.StreamFrame{
|
|
StreamID: 42,
|
|
Offset: 1337,
|
|
Data: bytes.Repeat([]byte{'a'}, int(maxPacketSize)*3/2),
|
|
}},
|
|
})
|
|
Expect(err).ToNot(HaveOccurred())
|
|
Expect(packets).To(HaveLen(2))
|
|
Expect(packets[0].frames[0]).To(BeAssignableToTypeOf(&wire.StopWaitingFrame{}))
|
|
Expect(packets[1].frames[0]).To(BeAssignableToTypeOf(&wire.StopWaitingFrame{}))
|
|
Expect(packets[0].frames[1]).To(BeAssignableToTypeOf(&wire.StreamFrame{}))
|
|
Expect(packets[1].frames[1]).To(BeAssignableToTypeOf(&wire.StreamFrame{}))
|
|
sf1 := packets[0].frames[1].(*wire.StreamFrame)
|
|
sf2 := packets[1].frames[1].(*wire.StreamFrame)
|
|
Expect(sf1.StreamID).To(Equal(protocol.StreamID(42)))
|
|
Expect(sf1.Offset).To(Equal(protocol.ByteCount(1337)))
|
|
Expect(sf1.DataLenPresent).To(BeFalse())
|
|
Expect(sf2.StreamID).To(Equal(protocol.StreamID(42)))
|
|
Expect(sf2.Offset).To(Equal(protocol.ByteCount(1337) + sf1.DataLen()))
|
|
Expect(sf2.DataLenPresent).To(BeFalse())
|
|
Expect(sf1.DataLen() + sf2.DataLen()).To(Equal(maxPacketSize * 3 / 2))
|
|
Expect(packets[0].raw).To(HaveLen(int(maxPacketSize)))
|
|
})
|
|
|
|
It("splits STREAM frames, if necessary", func() {
|
|
for i := 0; i < 100; i++ {
|
|
sealingManager.EXPECT().GetSealer().Return(protocol.EncryptionForwardSecure, sealer).MaxTimes(2)
|
|
swf := &wire.StopWaitingFrame{}
|
|
ackFramer.EXPECT().GetStopWaitingFrame(true).Return(swf)
|
|
sf1 := &wire.StreamFrame{
|
|
StreamID: 42,
|
|
Offset: 1337,
|
|
Data: bytes.Repeat([]byte{'a'}, 1+int(rand.Int31n(int32(maxPacketSize*4/5)))),
|
|
}
|
|
sf2 := &wire.StreamFrame{
|
|
StreamID: 2,
|
|
Offset: 42,
|
|
Data: bytes.Repeat([]byte{'b'}, 1+int(rand.Int31n(int32(maxPacketSize*4/5)))),
|
|
}
|
|
expectedDataLen := sf1.DataLen() + sf2.DataLen()
|
|
fmt.Fprintf(GinkgoWriter, "STREAM frame 1: %d bytes, STREAM frame 2: %d\n", sf1.DataLen(), sf2.DataLen())
|
|
frames := []wire.Frame{sf1, sf2}
|
|
packets, err := packer.PackRetransmission(&ackhandler.Packet{
|
|
EncryptionLevel: protocol.EncryptionForwardSecure,
|
|
Frames: frames,
|
|
})
|
|
Expect(err).ToNot(HaveOccurred())
|
|
|
|
if len(packets) > 1 {
|
|
Expect(packets[0].raw).To(HaveLen(int(maxPacketSize)))
|
|
}
|
|
|
|
var dataLen protocol.ByteCount
|
|
for _, p := range packets {
|
|
for _, f := range p.frames {
|
|
if sf, ok := f.(*wire.StreamFrame); ok {
|
|
dataLen += sf.DataLen()
|
|
}
|
|
}
|
|
}
|
|
Expect(dataLen).To(Equal(expectedDataLen))
|
|
}
|
|
})
|
|
|
|
It("packs two packets for retransmission if the original packet contained many STREAM frames", func() {
|
|
sealingManager.EXPECT().GetSealer().Return(protocol.EncryptionForwardSecure, sealer)
|
|
swf := &wire.StopWaitingFrame{}
|
|
ackFramer.EXPECT().GetStopWaitingFrame(true).Return(swf)
|
|
var frames []wire.Frame
|
|
var totalLen protocol.ByteCount
|
|
// pack a bunch of control frames, such that the packet is way bigger than a single packet
|
|
for i := 0; totalLen < maxPacketSize*3/2; i++ {
|
|
f := &wire.StreamFrame{
|
|
StreamID: protocol.StreamID(i),
|
|
Data: []byte("foobar"),
|
|
DataLenPresent: true,
|
|
}
|
|
frames = append(frames, f)
|
|
totalLen += f.Length(packer.version)
|
|
}
|
|
packets, err := packer.PackRetransmission(&ackhandler.Packet{
|
|
EncryptionLevel: protocol.EncryptionForwardSecure,
|
|
Frames: frames,
|
|
})
|
|
Expect(err).ToNot(HaveOccurred())
|
|
Expect(packets).To(HaveLen(2))
|
|
Expect(len(packets[0].frames) + len(packets[1].frames)).To(Equal(len(frames) + 2)) // all frames, plus 2 STOP_WAITING frames
|
|
Expect(packets[0].frames[0]).To(BeAssignableToTypeOf(&wire.StopWaitingFrame{}))
|
|
Expect(packets[1].frames[0]).To(BeAssignableToTypeOf(&wire.StopWaitingFrame{}))
|
|
Expect(packets[0].frames[1:]).To(Equal(frames[:len(packets[0].frames)-1]))
|
|
Expect(packets[1].frames[1:]).To(Equal(frames[len(packets[0].frames)-1:]))
|
|
// check that the first packet was filled up as far as possible:
|
|
// if the first frame (after the STOP_WAITING) was packed into the first packet, it would have overflown the MaxPacketSize
|
|
Expect(len(packets[0].raw) + int(packets[1].frames[1].Length(packer.version))).To(BeNumerically(">", maxPacketSize-protocol.MinStreamFrameSize))
|
|
})
|
|
|
|
It("correctly sets the DataLenPresent on STREAM frames", func() {
|
|
sealingManager.EXPECT().GetSealer().Return(protocol.EncryptionForwardSecure, sealer)
|
|
swf := &wire.StopWaitingFrame{}
|
|
ackFramer.EXPECT().GetStopWaitingFrame(true).Return(swf)
|
|
frames := []wire.Frame{
|
|
&wire.StreamFrame{StreamID: 4, Data: []byte("foobar"), DataLenPresent: true},
|
|
&wire.StreamFrame{StreamID: 5, Data: []byte("barfoo")},
|
|
}
|
|
packets, err := packer.PackRetransmission(&ackhandler.Packet{
|
|
EncryptionLevel: protocol.EncryptionForwardSecure,
|
|
Frames: frames,
|
|
})
|
|
Expect(err).ToNot(HaveOccurred())
|
|
Expect(packets).To(HaveLen(1))
|
|
p := packets[0]
|
|
Expect(p.frames).To(HaveLen(3))
|
|
Expect(p.frames[1]).To(BeAssignableToTypeOf(&wire.StreamFrame{}))
|
|
Expect(p.frames[2]).To(BeAssignableToTypeOf(&wire.StreamFrame{}))
|
|
sf1 := p.frames[1].(*wire.StreamFrame)
|
|
sf2 := p.frames[2].(*wire.StreamFrame)
|
|
Expect(sf1.StreamID).To(Equal(protocol.StreamID(4)))
|
|
Expect(sf1.DataLenPresent).To(BeTrue())
|
|
Expect(sf2.StreamID).To(Equal(protocol.StreamID(5)))
|
|
Expect(sf2.DataLenPresent).To(BeFalse())
|
|
})
|
|
})
|
|
|
|
Context("packing ACK packets", func() {
|
|
It("doesn't pack a packet if there's no ACK to send", func() {
|
|
ackFramer.EXPECT().GetAckFrame()
|
|
p, err := packer.MaybePackAckPacket()
|
|
Expect(err).ToNot(HaveOccurred())
|
|
Expect(p).To(BeNil())
|
|
})
|
|
|
|
It("packs ACK packets", func() {
|
|
sealingManager.EXPECT().GetSealer().Return(protocol.EncryptionForwardSecure, sealer)
|
|
ack := &wire.AckFrame{AckRanges: []wire.AckRange{{Smallest: 1, Largest: 10}}}
|
|
swf := &wire.StopWaitingFrame{}
|
|
ackFramer.EXPECT().GetAckFrame().Return(ack)
|
|
ackFramer.EXPECT().GetStopWaitingFrame(false).Return(swf)
|
|
p, err := packer.MaybePackAckPacket()
|
|
Expect(err).NotTo(HaveOccurred())
|
|
Expect(p.frames).To(Equal([]wire.Frame{ack, swf}))
|
|
})
|
|
|
|
It("doesn't add a STOP_WAITING frame, for gQUIC 44", func() {
|
|
sealingManager.EXPECT().GetSealer().Return(protocol.EncryptionForwardSecure, sealer)
|
|
packer.version = protocol.Version44
|
|
ack := &wire.AckFrame{AckRanges: []wire.AckRange{{Smallest: 1, Largest: 10}}}
|
|
ackFramer.EXPECT().GetAckFrame().Return(ack)
|
|
p, err := packer.MaybePackAckPacket()
|
|
Expect(err).NotTo(HaveOccurred())
|
|
Expect(p.frames).To(Equal([]wire.Frame{ack}))
|
|
})
|
|
})
|
|
})
|