881 lines
24 KiB
Go
881 lines
24 KiB
Go
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package quic
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import (
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"errors"
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"io"
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"time"
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"github.com/lucas-clemente/quic-go/congestion"
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"github.com/lucas-clemente/quic-go/flowcontrol"
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"github.com/lucas-clemente/quic-go/frames"
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"github.com/lucas-clemente/quic-go/protocol"
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"github.com/lucas-clemente/quic-go/utils"
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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 mockFlowControlHandler struct {
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streamsContributing []protocol.StreamID
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sendWindowSizes map[protocol.StreamID]protocol.ByteCount
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remainingConnectionWindowSize protocol.ByteCount
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bytesReadForStream protocol.StreamID
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bytesRead protocol.ByteCount
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bytesSent protocol.ByteCount
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receiveWindow protocol.ByteCount
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highestReceivedForStream protocol.StreamID
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highestReceived protocol.ByteCount
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flowControlViolation error
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triggerStreamWindowUpdate bool
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triggerConnectionWindowUpdate bool
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}
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var _ flowcontrol.FlowControlManager = &mockFlowControlHandler{}
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func newMockFlowControlHandler() *mockFlowControlHandler {
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return &mockFlowControlHandler{
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sendWindowSizes: make(map[protocol.StreamID]protocol.ByteCount),
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}
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}
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func (m *mockFlowControlHandler) NewStream(streamID protocol.StreamID, contributesToConnectionFlow bool) {
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panic("not implemented")
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}
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func (m *mockFlowControlHandler) RemoveStream(streamID protocol.StreamID) {
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delete(m.sendWindowSizes, streamID)
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}
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func (m *mockFlowControlHandler) GetWindowUpdates() (res []flowcontrol.WindowUpdate) {
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if m.triggerStreamWindowUpdate {
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res = append(res, flowcontrol.WindowUpdate{StreamID: 42, Offset: 0x1337})
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}
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if m.triggerConnectionWindowUpdate {
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res = append(res, flowcontrol.WindowUpdate{StreamID: 0, Offset: 0x1337})
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}
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return res
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}
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func (m *mockFlowControlHandler) GetReceiveWindow(protocol.StreamID) (protocol.ByteCount, error) {
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return m.receiveWindow, nil
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}
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func (m *mockFlowControlHandler) AddBytesRead(streamID protocol.StreamID, n protocol.ByteCount) error {
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m.bytesReadForStream = streamID
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m.bytesRead = n
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return nil
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}
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func (m *mockFlowControlHandler) ResetStream(streamID protocol.StreamID, byteOffset protocol.ByteCount) error {
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m.bytesRead = byteOffset
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return m.UpdateHighestReceived(streamID, byteOffset)
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}
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func (m *mockFlowControlHandler) UpdateHighestReceived(streamID protocol.StreamID, byteOffset protocol.ByteCount) error {
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if m.flowControlViolation != nil {
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return m.flowControlViolation
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}
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m.highestReceivedForStream = streamID
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m.highestReceived = byteOffset
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return nil
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}
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func (m *mockFlowControlHandler) AddBytesSent(streamID protocol.StreamID, n protocol.ByteCount) error {
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m.bytesSent += n
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m.sendWindowSizes[streamID] -= n
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for _, s := range m.streamsContributing {
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if s == streamID {
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m.remainingConnectionWindowSize -= n
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return nil
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}
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}
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return nil
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}
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func (m *mockFlowControlHandler) SendWindowSize(streamID protocol.StreamID) (protocol.ByteCount, error) {
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res := m.sendWindowSizes[streamID]
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for _, s := range m.streamsContributing {
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if s == streamID {
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return utils.MinByteCount(res, m.remainingConnectionWindowSize), nil
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}
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}
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return res, nil
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}
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func (m *mockFlowControlHandler) RemainingConnectionWindowSize() protocol.ByteCount {
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return m.remainingConnectionWindowSize
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}
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func (m *mockFlowControlHandler) UpdateWindow(streamID protocol.StreamID, offset protocol.ByteCount) (bool, error) {
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panic("not implemented")
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}
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var _ = Describe("Stream", func() {
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var (
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str *stream
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onDataCalled bool
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resetCalled bool
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resetCalledForStream protocol.StreamID
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resetCalledAtOffset protocol.ByteCount
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)
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onData := func() {
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onDataCalled = true
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}
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onReset := func(id protocol.StreamID, offset protocol.ByteCount) {
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resetCalled = true
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resetCalledForStream = id
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resetCalledAtOffset = offset
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}
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BeforeEach(func() {
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onDataCalled = false
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resetCalled = false
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var streamID protocol.StreamID = 1337
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cpm := &mockConnectionParametersManager{}
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flowControlManager := flowcontrol.NewFlowControlManager(cpm, &congestion.RTTStats{})
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flowControlManager.NewStream(streamID, true)
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str, _ = newStream(streamID, onData, onReset, flowControlManager)
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})
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It("gets stream id", func() {
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Expect(str.StreamID()).To(Equal(protocol.StreamID(1337)))
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})
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Context("reading", func() {
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It("reads a single StreamFrame", func() {
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frame := frames.StreamFrame{
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Offset: 0,
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Data: []byte{0xDE, 0xAD, 0xBE, 0xEF},
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}
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err := str.AddStreamFrame(&frame)
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Expect(err).ToNot(HaveOccurred())
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b := make([]byte, 4)
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n, err := str.Read(b)
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Expect(err).ToNot(HaveOccurred())
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Expect(n).To(Equal(4))
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Expect(b).To(Equal([]byte{0xDE, 0xAD, 0xBE, 0xEF}))
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})
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It("reads a single StreamFrame in multiple goes", func() {
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frame := frames.StreamFrame{
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Offset: 0,
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Data: []byte{0xDE, 0xAD, 0xBE, 0xEF},
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}
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err := str.AddStreamFrame(&frame)
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Expect(err).ToNot(HaveOccurred())
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b := make([]byte, 2)
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n, err := str.Read(b)
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Expect(err).ToNot(HaveOccurred())
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Expect(n).To(Equal(2))
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Expect(b).To(Equal([]byte{0xDE, 0xAD}))
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n, err = str.Read(b)
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Expect(err).ToNot(HaveOccurred())
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Expect(n).To(Equal(2))
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Expect(b).To(Equal([]byte{0xBE, 0xEF}))
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})
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It("reads all data available", func() {
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frame1 := frames.StreamFrame{
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Offset: 0,
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Data: []byte{0xDE, 0xAD},
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}
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frame2 := frames.StreamFrame{
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Offset: 2,
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Data: []byte{0xBE, 0xEF},
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}
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err := str.AddStreamFrame(&frame1)
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Expect(err).ToNot(HaveOccurred())
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err = str.AddStreamFrame(&frame2)
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Expect(err).ToNot(HaveOccurred())
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b := make([]byte, 6)
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n, err := str.Read(b)
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Expect(err).ToNot(HaveOccurred())
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Expect(n).To(Equal(4))
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Expect(b).To(Equal([]byte{0xDE, 0xAD, 0xBE, 0xEF, 0x00, 0x00}))
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})
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It("assembles multiple StreamFrames", func() {
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frame1 := frames.StreamFrame{
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Offset: 0,
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Data: []byte{0xDE, 0xAD},
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}
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frame2 := frames.StreamFrame{
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Offset: 2,
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Data: []byte{0xBE, 0xEF},
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}
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err := str.AddStreamFrame(&frame1)
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Expect(err).ToNot(HaveOccurred())
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err = str.AddStreamFrame(&frame2)
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Expect(err).ToNot(HaveOccurred())
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b := make([]byte, 4)
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n, err := str.Read(b)
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Expect(err).ToNot(HaveOccurred())
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Expect(n).To(Equal(4))
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Expect(b).To(Equal([]byte{0xDE, 0xAD, 0xBE, 0xEF}))
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})
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It("waits until data is available", func() {
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go func() {
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frame := frames.StreamFrame{
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Offset: 0,
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Data: []byte{0xDE, 0xAD},
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}
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time.Sleep(time.Millisecond)
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err := str.AddStreamFrame(&frame)
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Expect(err).ToNot(HaveOccurred())
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}()
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b := make([]byte, 2)
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n, err := str.Read(b)
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Expect(err).ToNot(HaveOccurred())
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Expect(n).To(Equal(2))
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})
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It("handles StreamFrames in wrong order", func() {
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frame1 := frames.StreamFrame{
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Offset: 2,
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Data: []byte{0xBE, 0xEF},
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}
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frame2 := frames.StreamFrame{
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Offset: 0,
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Data: []byte{0xDE, 0xAD},
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}
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err := str.AddStreamFrame(&frame1)
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Expect(err).ToNot(HaveOccurred())
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err = str.AddStreamFrame(&frame2)
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Expect(err).ToNot(HaveOccurred())
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b := make([]byte, 4)
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n, err := str.Read(b)
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Expect(err).ToNot(HaveOccurred())
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Expect(n).To(Equal(4))
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Expect(b).To(Equal([]byte{0xDE, 0xAD, 0xBE, 0xEF}))
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})
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It("ignores duplicate StreamFrames", func() {
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frame1 := frames.StreamFrame{
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Offset: 0,
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Data: []byte{0xDE, 0xAD},
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}
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frame2 := frames.StreamFrame{
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Offset: 0,
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Data: []byte{0x13, 0x37},
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}
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frame3 := frames.StreamFrame{
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Offset: 2,
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Data: []byte{0xBE, 0xEF},
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}
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err := str.AddStreamFrame(&frame1)
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Expect(err).ToNot(HaveOccurred())
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err = str.AddStreamFrame(&frame2)
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Expect(err).ToNot(HaveOccurred())
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err = str.AddStreamFrame(&frame3)
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Expect(err).ToNot(HaveOccurred())
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b := make([]byte, 4)
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n, err := str.Read(b)
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Expect(err).ToNot(HaveOccurred())
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Expect(n).To(Equal(4))
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Expect(b).To(Equal([]byte{0xDE, 0xAD, 0xBE, 0xEF}))
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})
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It("doesn't rejects a StreamFrames with an overlapping data range", func() {
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frame1 := frames.StreamFrame{
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Offset: 0,
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Data: []byte("foob"),
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}
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frame2 := frames.StreamFrame{
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Offset: 2,
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Data: []byte("obar"),
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}
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err := str.AddStreamFrame(&frame1)
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Expect(err).ToNot(HaveOccurred())
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err = str.AddStreamFrame(&frame2)
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b := make([]byte, 6)
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n, err := str.Read(b)
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Expect(err).ToNot(HaveOccurred())
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Expect(n).To(Equal(6))
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Expect(b).To(Equal([]byte("foobar")))
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})
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It("calls onData", func() {
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frame := frames.StreamFrame{
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Offset: 0,
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Data: []byte{0xDE, 0xAD, 0xBE, 0xEF},
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}
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str.AddStreamFrame(&frame)
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b := make([]byte, 4)
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_, err := str.Read(b)
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Expect(err).ToNot(HaveOccurred())
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Expect(onDataCalled).To(BeTrue())
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})
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Context("closing", func() {
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Context("with FIN bit", func() {
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It("returns EOFs", func() {
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frame := frames.StreamFrame{
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Offset: 0,
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Data: []byte{0xDE, 0xAD, 0xBE, 0xEF},
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FinBit: true,
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}
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str.AddStreamFrame(&frame)
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b := make([]byte, 4)
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n, err := str.Read(b)
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Expect(err).To(MatchError(io.EOF))
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Expect(n).To(Equal(4))
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Expect(b).To(Equal([]byte{0xDE, 0xAD, 0xBE, 0xEF}))
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n, err = str.Read(b)
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Expect(n).To(BeZero())
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Expect(err).To(MatchError(io.EOF))
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})
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It("handles out-of-order frames", func() {
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frame1 := frames.StreamFrame{
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Offset: 2,
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Data: []byte{0xBE, 0xEF},
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FinBit: true,
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}
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frame2 := frames.StreamFrame{
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Offset: 0,
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Data: []byte{0xDE, 0xAD},
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}
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err := str.AddStreamFrame(&frame1)
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Expect(err).ToNot(HaveOccurred())
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err = str.AddStreamFrame(&frame2)
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Expect(err).ToNot(HaveOccurred())
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b := make([]byte, 4)
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n, err := str.Read(b)
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Expect(err).To(MatchError(io.EOF))
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Expect(n).To(Equal(4))
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Expect(b).To(Equal([]byte{0xDE, 0xAD, 0xBE, 0xEF}))
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n, err = str.Read(b)
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Expect(n).To(BeZero())
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Expect(err).To(MatchError(io.EOF))
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})
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It("returns EOFs with partial read", func() {
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frame := frames.StreamFrame{
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Offset: 0,
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Data: []byte{0xDE, 0xAD},
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FinBit: true,
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}
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err := str.AddStreamFrame(&frame)
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Expect(err).ToNot(HaveOccurred())
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b := make([]byte, 4)
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n, err := str.Read(b)
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Expect(err).To(MatchError(io.EOF))
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Expect(n).To(Equal(2))
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Expect(b[:n]).To(Equal([]byte{0xDE, 0xAD}))
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})
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|
|
It("handles immediate FINs", func() {
|
||
|
|
frame := frames.StreamFrame{
|
||
|
|
Offset: 0,
|
||
|
|
Data: []byte{},
|
||
|
|
FinBit: true,
|
||
|
|
}
|
||
|
|
err := str.AddStreamFrame(&frame)
|
||
|
|
Expect(err).ToNot(HaveOccurred())
|
||
|
|
b := make([]byte, 4)
|
||
|
|
n, err := str.Read(b)
|
||
|
|
Expect(n).To(BeZero())
|
||
|
|
Expect(err).To(MatchError(io.EOF))
|
||
|
|
})
|
||
|
|
})
|
||
|
|
|
||
|
|
Context("when CloseRemote is called", func() {
|
||
|
|
It("closes", func() {
|
||
|
|
str.CloseRemote(0)
|
||
|
|
b := make([]byte, 8)
|
||
|
|
n, err := str.Read(b)
|
||
|
|
Expect(n).To(BeZero())
|
||
|
|
Expect(err).To(MatchError(io.EOF))
|
||
|
|
})
|
||
|
|
})
|
||
|
|
})
|
||
|
|
|
||
|
|
Context("cancelling the stream", func() {
|
||
|
|
testErr := errors.New("test error")
|
||
|
|
|
||
|
|
It("immediately returns all reads", func() {
|
||
|
|
var readReturned bool
|
||
|
|
var n int
|
||
|
|
var err error
|
||
|
|
b := make([]byte, 4)
|
||
|
|
go func() {
|
||
|
|
n, err = str.Read(b)
|
||
|
|
readReturned = true
|
||
|
|
}()
|
||
|
|
Consistently(func() bool { return readReturned }).Should(BeFalse())
|
||
|
|
str.Cancel(testErr)
|
||
|
|
Eventually(func() bool { return readReturned }).Should(BeTrue())
|
||
|
|
Expect(n).To(BeZero())
|
||
|
|
Expect(err).To(MatchError(testErr))
|
||
|
|
})
|
||
|
|
|
||
|
|
It("errors for all following reads", func() {
|
||
|
|
str.Cancel(testErr)
|
||
|
|
b := make([]byte, 1)
|
||
|
|
n, err := str.Read(b)
|
||
|
|
Expect(n).To(BeZero())
|
||
|
|
Expect(err).To(MatchError(testErr))
|
||
|
|
})
|
||
|
|
})
|
||
|
|
})
|
||
|
|
|
||
|
|
Context("resetting", func() {
|
||
|
|
testErr := errors.New("testErr")
|
||
|
|
|
||
|
|
Context("reset by the peer", func() {
|
||
|
|
It("continues reading after receiving a remote error", func() {
|
||
|
|
frame := frames.StreamFrame{
|
||
|
|
Offset: 0,
|
||
|
|
Data: []byte{0xDE, 0xAD, 0xBE, 0xEF},
|
||
|
|
}
|
||
|
|
str.AddStreamFrame(&frame)
|
||
|
|
str.RegisterRemoteError(testErr)
|
||
|
|
b := make([]byte, 4)
|
||
|
|
n, err := str.Read(b)
|
||
|
|
Expect(err).ToNot(HaveOccurred())
|
||
|
|
Expect(n).To(Equal(4))
|
||
|
|
})
|
||
|
|
|
||
|
|
It("reads a delayed StreamFrame that arrives after receiving a remote error", func() {
|
||
|
|
str.RegisterRemoteError(testErr)
|
||
|
|
frame := frames.StreamFrame{
|
||
|
|
Offset: 0,
|
||
|
|
Data: []byte{0xDE, 0xAD, 0xBE, 0xEF},
|
||
|
|
}
|
||
|
|
err := str.AddStreamFrame(&frame)
|
||
|
|
Expect(err).ToNot(HaveOccurred())
|
||
|
|
b := make([]byte, 4)
|
||
|
|
n, err := str.Read(b)
|
||
|
|
Expect(err).ToNot(HaveOccurred())
|
||
|
|
Expect(n).To(Equal(4))
|
||
|
|
})
|
||
|
|
|
||
|
|
It("returns the error if reading past the offset of the frame received", func() {
|
||
|
|
frame := frames.StreamFrame{
|
||
|
|
Offset: 0,
|
||
|
|
Data: []byte{0xDE, 0xAD, 0xBE, 0xEF},
|
||
|
|
}
|
||
|
|
str.AddStreamFrame(&frame)
|
||
|
|
str.RegisterRemoteError(testErr)
|
||
|
|
b := make([]byte, 10)
|
||
|
|
n, err := str.Read(b)
|
||
|
|
Expect(b[0:4]).To(Equal(frame.Data))
|
||
|
|
Expect(err).To(MatchError(testErr))
|
||
|
|
Expect(n).To(Equal(4))
|
||
|
|
})
|
||
|
|
|
||
|
|
It("returns an EOF when reading past the offset, if the stream received a finbit", func() {
|
||
|
|
frame := frames.StreamFrame{
|
||
|
|
Offset: 0,
|
||
|
|
Data: []byte{0xDE, 0xAD, 0xBE, 0xEF},
|
||
|
|
FinBit: true,
|
||
|
|
}
|
||
|
|
str.AddStreamFrame(&frame)
|
||
|
|
str.RegisterRemoteError(testErr)
|
||
|
|
b := make([]byte, 10)
|
||
|
|
n, err := str.Read(b)
|
||
|
|
Expect(b[:4]).To(Equal(frame.Data))
|
||
|
|
Expect(err).To(MatchError(io.EOF))
|
||
|
|
Expect(n).To(Equal(4))
|
||
|
|
})
|
||
|
|
|
||
|
|
It("continues reading in small chunks after receiving a remote error", func() {
|
||
|
|
frame := frames.StreamFrame{
|
||
|
|
Offset: 0,
|
||
|
|
Data: []byte{0xDE, 0xAD, 0xBE, 0xEF},
|
||
|
|
FinBit: true,
|
||
|
|
}
|
||
|
|
str.AddStreamFrame(&frame)
|
||
|
|
str.RegisterRemoteError(testErr)
|
||
|
|
b := make([]byte, 3)
|
||
|
|
_, err := str.Read(b)
|
||
|
|
Expect(err).ToNot(HaveOccurred())
|
||
|
|
Expect(b).To(Equal([]byte{0xde, 0xad, 0xbe}))
|
||
|
|
b = make([]byte, 3)
|
||
|
|
n, err := str.Read(b)
|
||
|
|
Expect(err).To(MatchError(io.EOF))
|
||
|
|
Expect(b[:1]).To(Equal([]byte{0xef}))
|
||
|
|
Expect(n).To(Equal(1))
|
||
|
|
})
|
||
|
|
|
||
|
|
It("doesn't inform the flow controller about bytes read after receiving the remote error", func() {
|
||
|
|
str.flowControlManager = newMockFlowControlHandler()
|
||
|
|
frame := frames.StreamFrame{
|
||
|
|
Offset: 0,
|
||
|
|
StreamID: 5,
|
||
|
|
Data: []byte{0xDE, 0xAD, 0xBE, 0xEF},
|
||
|
|
}
|
||
|
|
str.AddStreamFrame(&frame)
|
||
|
|
str.flowControlManager.ResetStream(5, 4)
|
||
|
|
str.RegisterRemoteError(testErr)
|
||
|
|
b := make([]byte, 3)
|
||
|
|
_, err := str.Read(b)
|
||
|
|
Expect(err).ToNot(HaveOccurred())
|
||
|
|
Expect(str.flowControlManager.(*mockFlowControlHandler).bytesRead).To(BeEquivalentTo(4))
|
||
|
|
})
|
||
|
|
|
||
|
|
It("stops writing after receiving a remote error", func() {
|
||
|
|
var writeReturned bool
|
||
|
|
var n int
|
||
|
|
var err error
|
||
|
|
|
||
|
|
go func() {
|
||
|
|
n, err = str.Write([]byte("foobar"))
|
||
|
|
writeReturned = true
|
||
|
|
}()
|
||
|
|
str.RegisterRemoteError(testErr)
|
||
|
|
Eventually(func() bool { return writeReturned }).Should(BeTrue())
|
||
|
|
Expect(n).To(BeZero())
|
||
|
|
Expect(err).To(MatchError(testErr))
|
||
|
|
})
|
||
|
|
|
||
|
|
It("calls onReset when receiving a remote error", func() {
|
||
|
|
var writeReturned bool
|
||
|
|
str.writeOffset = 0x1000
|
||
|
|
go func() {
|
||
|
|
str.Write([]byte("foobar"))
|
||
|
|
writeReturned = true
|
||
|
|
}()
|
||
|
|
str.RegisterRemoteError(testErr)
|
||
|
|
Expect(resetCalled).To(BeTrue())
|
||
|
|
Expect(resetCalledForStream).To(Equal(protocol.StreamID(1337)))
|
||
|
|
Expect(resetCalledAtOffset).To(Equal(protocol.ByteCount(0x1000)))
|
||
|
|
Eventually(func() bool { return writeReturned }).Should(BeTrue())
|
||
|
|
})
|
||
|
|
|
||
|
|
It("doesn't call onReset if it already sent a FIN", func() {
|
||
|
|
str.Close()
|
||
|
|
str.sentFin()
|
||
|
|
str.RegisterRemoteError(testErr)
|
||
|
|
Expect(resetCalled).To(BeFalse())
|
||
|
|
})
|
||
|
|
|
||
|
|
It("doesn't call onReset if the stream was reset locally before", func() {
|
||
|
|
str.Reset(testErr)
|
||
|
|
Expect(resetCalled).To(BeTrue())
|
||
|
|
resetCalled = false
|
||
|
|
str.RegisterRemoteError(testErr)
|
||
|
|
Expect(resetCalled).To(BeFalse())
|
||
|
|
})
|
||
|
|
|
||
|
|
It("doesn't call onReset twice, when it gets two remote errors", func() {
|
||
|
|
str.RegisterRemoteError(testErr)
|
||
|
|
Expect(resetCalled).To(BeTrue())
|
||
|
|
resetCalled = false
|
||
|
|
str.RegisterRemoteError(testErr)
|
||
|
|
Expect(resetCalled).To(BeFalse())
|
||
|
|
})
|
||
|
|
})
|
||
|
|
|
||
|
|
Context("reset locally", func() {
|
||
|
|
It("stops writing", func() {
|
||
|
|
var writeReturned bool
|
||
|
|
var n int
|
||
|
|
var err error
|
||
|
|
|
||
|
|
go func() {
|
||
|
|
n, err = str.Write([]byte("foobar"))
|
||
|
|
writeReturned = true
|
||
|
|
}()
|
||
|
|
Consistently(func() bool { return writeReturned }).Should(BeFalse())
|
||
|
|
str.Reset(testErr)
|
||
|
|
Expect(str.getDataForWriting(6)).To(BeNil())
|
||
|
|
Eventually(func() bool { return writeReturned }).Should(BeTrue())
|
||
|
|
Expect(n).To(BeZero())
|
||
|
|
Expect(err).To(MatchError(testErr))
|
||
|
|
})
|
||
|
|
|
||
|
|
It("doesn't allow further writes", func() {
|
||
|
|
str.Reset(testErr)
|
||
|
|
n, err := str.Write([]byte("foobar"))
|
||
|
|
Expect(n).To(BeZero())
|
||
|
|
Expect(err).To(MatchError(testErr))
|
||
|
|
Expect(str.getDataForWriting(6)).To(BeNil())
|
||
|
|
})
|
||
|
|
|
||
|
|
It("stops reading", func() {
|
||
|
|
var readReturned bool
|
||
|
|
var n int
|
||
|
|
var err error
|
||
|
|
|
||
|
|
go func() {
|
||
|
|
b := make([]byte, 4)
|
||
|
|
n, err = str.Read(b)
|
||
|
|
readReturned = true
|
||
|
|
}()
|
||
|
|
Consistently(func() bool { return readReturned }).Should(BeFalse())
|
||
|
|
str.Reset(testErr)
|
||
|
|
Eventually(func() bool { return readReturned }).Should(BeTrue())
|
||
|
|
Expect(n).To(BeZero())
|
||
|
|
Expect(err).To(MatchError(testErr))
|
||
|
|
})
|
||
|
|
|
||
|
|
It("doesn't allow further reads", func() {
|
||
|
|
str.AddStreamFrame(&frames.StreamFrame{
|
||
|
|
Data: []byte("foobar"),
|
||
|
|
})
|
||
|
|
str.Reset(testErr)
|
||
|
|
b := make([]byte, 6)
|
||
|
|
n, err := str.Read(b)
|
||
|
|
Expect(n).To(BeZero())
|
||
|
|
Expect(err).To(MatchError(testErr))
|
||
|
|
})
|
||
|
|
|
||
|
|
It("calls onReset", func() {
|
||
|
|
str.writeOffset = 0x1000
|
||
|
|
str.Reset(testErr)
|
||
|
|
Expect(resetCalled).To(BeTrue())
|
||
|
|
Expect(resetCalledForStream).To(Equal(protocol.StreamID(1337)))
|
||
|
|
Expect(resetCalledAtOffset).To(Equal(protocol.ByteCount(0x1000)))
|
||
|
|
})
|
||
|
|
|
||
|
|
It("doesn't call onReset if it already sent a FIN", func() {
|
||
|
|
str.Close()
|
||
|
|
str.sentFin()
|
||
|
|
str.Reset(testErr)
|
||
|
|
Expect(resetCalled).To(BeFalse())
|
||
|
|
})
|
||
|
|
|
||
|
|
It("doesn't call onReset if the stream was reset remotely before", func() {
|
||
|
|
str.RegisterRemoteError(testErr)
|
||
|
|
Expect(resetCalled).To(BeTrue())
|
||
|
|
resetCalled = false
|
||
|
|
str.Reset(testErr)
|
||
|
|
Expect(resetCalled).To(BeFalse())
|
||
|
|
})
|
||
|
|
|
||
|
|
It("doesn't call onReset twice", func() {
|
||
|
|
str.Reset(testErr)
|
||
|
|
Expect(resetCalled).To(BeTrue())
|
||
|
|
resetCalled = false
|
||
|
|
str.Reset(testErr)
|
||
|
|
Expect(resetCalled).To(BeFalse())
|
||
|
|
})
|
||
|
|
})
|
||
|
|
})
|
||
|
|
|
||
|
|
Context("writing", func() {
|
||
|
|
It("writes and gets all data at once", func(done Done) {
|
||
|
|
go func() {
|
||
|
|
n, err := str.Write([]byte("foobar"))
|
||
|
|
Expect(err).ToNot(HaveOccurred())
|
||
|
|
Expect(n).To(Equal(6))
|
||
|
|
close(done)
|
||
|
|
}()
|
||
|
|
Eventually(func() []byte {
|
||
|
|
str.mutex.Lock()
|
||
|
|
defer str.mutex.Unlock()
|
||
|
|
return str.dataForWriting
|
||
|
|
}).Should(Equal([]byte("foobar")))
|
||
|
|
Expect(onDataCalled).To(BeTrue())
|
||
|
|
Expect(str.lenOfDataForWriting()).To(Equal(protocol.ByteCount(6)))
|
||
|
|
data := str.getDataForWriting(1000)
|
||
|
|
Expect(data).To(Equal([]byte("foobar")))
|
||
|
|
Expect(str.writeOffset).To(Equal(protocol.ByteCount(6)))
|
||
|
|
Expect(str.dataForWriting).To(BeNil())
|
||
|
|
})
|
||
|
|
|
||
|
|
It("writes and gets data in two turns", func(done Done) {
|
||
|
|
go func() {
|
||
|
|
n, err := str.Write([]byte("foobar"))
|
||
|
|
Expect(err).ToNot(HaveOccurred())
|
||
|
|
Expect(n).To(Equal(6))
|
||
|
|
close(done)
|
||
|
|
}()
|
||
|
|
Eventually(func() []byte {
|
||
|
|
str.mutex.Lock()
|
||
|
|
defer str.mutex.Unlock()
|
||
|
|
return str.dataForWriting
|
||
|
|
}).Should(Equal([]byte("foobar")))
|
||
|
|
Expect(str.lenOfDataForWriting()).To(Equal(protocol.ByteCount(6)))
|
||
|
|
data := str.getDataForWriting(3)
|
||
|
|
Expect(data).To(Equal([]byte("foo")))
|
||
|
|
Expect(str.writeOffset).To(Equal(protocol.ByteCount(3)))
|
||
|
|
Expect(str.dataForWriting).ToNot(BeNil())
|
||
|
|
Expect(str.lenOfDataForWriting()).To(Equal(protocol.ByteCount(3)))
|
||
|
|
data = str.getDataForWriting(3)
|
||
|
|
Expect(data).To(Equal([]byte("bar")))
|
||
|
|
Expect(str.writeOffset).To(Equal(protocol.ByteCount(6)))
|
||
|
|
Expect(str.dataForWriting).To(BeNil())
|
||
|
|
Expect(str.lenOfDataForWriting()).To(Equal(protocol.ByteCount(0)))
|
||
|
|
})
|
||
|
|
|
||
|
|
It("getDataForWriting returns nil if no data is available", func() {
|
||
|
|
Expect(str.getDataForWriting(1000)).To(BeNil())
|
||
|
|
})
|
||
|
|
|
||
|
|
It("copies the slice while writing", func() {
|
||
|
|
s := []byte("foo")
|
||
|
|
go func() {
|
||
|
|
n, err := str.Write(s)
|
||
|
|
Expect(err).ToNot(HaveOccurred())
|
||
|
|
Expect(n).To(Equal(3))
|
||
|
|
}()
|
||
|
|
Eventually(func() protocol.ByteCount { return str.lenOfDataForWriting() }).ShouldNot(BeZero())
|
||
|
|
s[0] = 'v'
|
||
|
|
Expect(str.getDataForWriting(3)).To(Equal([]byte("foo")))
|
||
|
|
})
|
||
|
|
|
||
|
|
It("returns when given a nil input", func() {
|
||
|
|
n, err := str.Write(nil)
|
||
|
|
Expect(n).To(BeZero())
|
||
|
|
Expect(err).ToNot(HaveOccurred())
|
||
|
|
})
|
||
|
|
|
||
|
|
It("returns when given an empty slice", func() {
|
||
|
|
n, err := str.Write([]byte(""))
|
||
|
|
Expect(n).To(BeZero())
|
||
|
|
Expect(err).ToNot(HaveOccurred())
|
||
|
|
})
|
||
|
|
|
||
|
|
Context("closing", func() {
|
||
|
|
It("sets finishedWriting when calling Close", func() {
|
||
|
|
str.Close()
|
||
|
|
Expect(str.finishedWriting.Get()).To(BeTrue())
|
||
|
|
})
|
||
|
|
|
||
|
|
It("allows FIN", func() {
|
||
|
|
str.Close()
|
||
|
|
Expect(str.shouldSendFin()).To(BeTrue())
|
||
|
|
})
|
||
|
|
|
||
|
|
It("does not allow FIN when there's still data", func() {
|
||
|
|
str.dataForWriting = []byte("foobar")
|
||
|
|
str.Close()
|
||
|
|
Expect(str.shouldSendFin()).To(BeFalse())
|
||
|
|
})
|
||
|
|
|
||
|
|
It("does not allow FIN when the stream is not closed", func() {
|
||
|
|
Expect(str.shouldSendFin()).To(BeFalse())
|
||
|
|
})
|
||
|
|
|
||
|
|
It("does not allow FIN after an error", func() {
|
||
|
|
str.Cancel(errors.New("test"))
|
||
|
|
Expect(str.shouldSendFin()).To(BeFalse())
|
||
|
|
})
|
||
|
|
|
||
|
|
It("does not allow FIN twice", func() {
|
||
|
|
str.Close()
|
||
|
|
Expect(str.shouldSendFin()).To(BeTrue())
|
||
|
|
str.sentFin()
|
||
|
|
Expect(str.shouldSendFin()).To(BeFalse())
|
||
|
|
})
|
||
|
|
})
|
||
|
|
|
||
|
|
Context("cancelling", func() {
|
||
|
|
testErr := errors.New("test")
|
||
|
|
|
||
|
|
It("returns errors when the stream is cancelled", func() {
|
||
|
|
str.Cancel(testErr)
|
||
|
|
n, err := str.Write([]byte("foo"))
|
||
|
|
Expect(n).To(BeZero())
|
||
|
|
Expect(err).To(MatchError(testErr))
|
||
|
|
})
|
||
|
|
|
||
|
|
It("doesn't get data for writing if an error occurred", func() {
|
||
|
|
go func() {
|
||
|
|
_, err := str.Write([]byte("foobar"))
|
||
|
|
Expect(err).To(MatchError(testErr))
|
||
|
|
}()
|
||
|
|
Eventually(func() []byte { return str.dataForWriting }).ShouldNot(BeNil())
|
||
|
|
Expect(str.lenOfDataForWriting()).ToNot(BeZero())
|
||
|
|
str.Cancel(testErr)
|
||
|
|
data := str.getDataForWriting(6)
|
||
|
|
Expect(data).To(BeNil())
|
||
|
|
Expect(str.lenOfDataForWriting()).To(BeZero())
|
||
|
|
})
|
||
|
|
})
|
||
|
|
})
|
||
|
|
|
||
|
|
Context("flow control, for receiving", func() {
|
||
|
|
BeforeEach(func() {
|
||
|
|
str.flowControlManager = &mockFlowControlHandler{}
|
||
|
|
})
|
||
|
|
|
||
|
|
It("updates the highestReceived value in the flow controller", func() {
|
||
|
|
frame := frames.StreamFrame{
|
||
|
|
Offset: 2,
|
||
|
|
Data: []byte("foobar"),
|
||
|
|
}
|
||
|
|
err := str.AddStreamFrame(&frame)
|
||
|
|
Expect(err).ToNot(HaveOccurred())
|
||
|
|
Expect(str.flowControlManager.(*mockFlowControlHandler).highestReceivedForStream).To(Equal(str.streamID))
|
||
|
|
Expect(str.flowControlManager.(*mockFlowControlHandler).highestReceived).To(Equal(protocol.ByteCount(2 + 6)))
|
||
|
|
})
|
||
|
|
|
||
|
|
It("errors when a StreamFrames causes a flow control violation", func() {
|
||
|
|
testErr := errors.New("flow control violation")
|
||
|
|
str.flowControlManager.(*mockFlowControlHandler).flowControlViolation = testErr
|
||
|
|
frame := frames.StreamFrame{
|
||
|
|
Offset: 2,
|
||
|
|
Data: []byte("foobar"),
|
||
|
|
}
|
||
|
|
err := str.AddStreamFrame(&frame)
|
||
|
|
Expect(err).To(MatchError(testErr))
|
||
|
|
})
|
||
|
|
})
|
||
|
|
|
||
|
|
Context("closing", func() {
|
||
|
|
testErr := errors.New("testErr")
|
||
|
|
|
||
|
|
finishReading := func() {
|
||
|
|
err := str.AddStreamFrame(&frames.StreamFrame{FinBit: true})
|
||
|
|
Expect(err).ToNot(HaveOccurred())
|
||
|
|
b := make([]byte, 100)
|
||
|
|
_, err = str.Read(b)
|
||
|
|
Expect(err).To(MatchError(io.EOF))
|
||
|
|
}
|
||
|
|
|
||
|
|
It("is finished after it is canceled", func() {
|
||
|
|
str.Cancel(testErr)
|
||
|
|
Expect(str.finished()).To(BeTrue())
|
||
|
|
})
|
||
|
|
|
||
|
|
It("is not finished if it is only closed for writing", func() {
|
||
|
|
str.Close()
|
||
|
|
str.sentFin()
|
||
|
|
Expect(str.finished()).To(BeFalse())
|
||
|
|
})
|
||
|
|
|
||
|
|
It("is not finished if it is only closed for reading", func() {
|
||
|
|
finishReading()
|
||
|
|
Expect(str.finished()).To(BeFalse())
|
||
|
|
})
|
||
|
|
|
||
|
|
It("is finished after receiving a RST and sending one", func() {
|
||
|
|
// this directly sends a rst
|
||
|
|
str.RegisterRemoteError(testErr)
|
||
|
|
Expect(str.rstSent.Get()).To(BeTrue())
|
||
|
|
Expect(str.finished()).To(BeTrue())
|
||
|
|
})
|
||
|
|
|
||
|
|
It("is finished after being locally reset and receiving a RST in response", func() {
|
||
|
|
str.Reset(testErr)
|
||
|
|
Expect(str.finished()).To(BeFalse())
|
||
|
|
str.RegisterRemoteError(testErr)
|
||
|
|
Expect(str.finished()).To(BeTrue())
|
||
|
|
})
|
||
|
|
|
||
|
|
It("is finished after finishing writing and receiving a RST", func() {
|
||
|
|
str.Close()
|
||
|
|
str.sentFin()
|
||
|
|
str.RegisterRemoteError(testErr)
|
||
|
|
Expect(str.finished()).To(BeTrue())
|
||
|
|
})
|
||
|
|
|
||
|
|
It("is finished after finishing reading and being locally reset", func() {
|
||
|
|
finishReading()
|
||
|
|
Expect(str.finished()).To(BeFalse())
|
||
|
|
str.Reset(testErr)
|
||
|
|
Expect(str.finished()).To(BeTrue())
|
||
|
|
})
|
||
|
|
})
|
||
|
|
|
||
|
|
})
|