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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,42 +1,65 @@ | ||
| package quic | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "io" | ||
|
|
||
| "github.com/lucas-clemente/quic-go/internal/flowcontrol" | ||
| "github.com/lucas-clemente/quic-go/internal/protocol" | ||
| "github.com/lucas-clemente/quic-go/internal/utils" | ||
| "github.com/lucas-clemente/quic-go/internal/wire" | ||
| ) | ||
|
|
||
| type cryptoStream interface { | ||
| StreamID() protocol.StreamID | ||
| io.Reader | ||
| // for receiving data | ||
| HandleCryptoFrame(*wire.CryptoFrame) error | ||
| GetCryptoData() []byte | ||
| // for sending data | ||
| io.Writer | ||
| handleStreamFrame(*wire.StreamFrame) error | ||
| hasData() bool | ||
| popStreamFrame(protocol.ByteCount) (*wire.StreamFrame, bool) | ||
| closeForShutdown(error) | ||
| setReadOffset(protocol.ByteCount) | ||
| // methods needed for flow control | ||
| getWindowUpdate() protocol.ByteCount | ||
| handleMaxStreamDataFrame(*wire.MaxStreamDataFrame) | ||
| HasData() bool | ||
| PopCryptoFrame(protocol.ByteCount) *wire.CryptoFrame | ||
| } | ||
|
|
||
| type cryptoStreamImpl struct { | ||
| *stream | ||
| queue *frameSorter | ||
|
|
||
| writeOffset protocol.ByteCount | ||
| writeBuf []byte | ||
| } | ||
|
|
||
| func newCryptoStream() cryptoStream { | ||
| return &cryptoStreamImpl{ | ||
| queue: newFrameSorter(), | ||
| } | ||
| } | ||
|
|
||
| func (s *cryptoStreamImpl) HandleCryptoFrame(f *wire.CryptoFrame) error { | ||
| if maxOffset := f.Offset + protocol.ByteCount(len(f.Data)); maxOffset > protocol.MaxCryptoStreamOffset { | ||
| return fmt.Errorf("received invalid offset %d on crypto stream, maximum allowed %d", maxOffset, protocol.MaxCryptoStreamOffset) | ||
| } | ||
| return s.queue.Push(f.Data, f.Offset, false) | ||
| } | ||
|
|
||
| // GetCryptoData retrieves data that was received in CRYPTO frames | ||
| func (s *cryptoStreamImpl) GetCryptoData() []byte { | ||
| data, _ := s.queue.Pop() | ||
| return data | ||
| } | ||
|
|
||
| var _ cryptoStream = &cryptoStreamImpl{} | ||
| // Writes writes data that should be sent out in CRYPTO frames | ||
| func (s *cryptoStreamImpl) Write(p []byte) (int, error) { | ||
| s.writeBuf = append(s.writeBuf, p...) | ||
| return len(p), nil | ||
| } | ||
|
|
||
| func newCryptoStream(sender streamSender, flowController flowcontrol.StreamFlowController, version protocol.VersionNumber) cryptoStream { | ||
| str := newStream(version.CryptoStreamID(), sender, flowController, version) | ||
| return &cryptoStreamImpl{str} | ||
| func (s *cryptoStreamImpl) HasData() bool { | ||
| return len(s.writeBuf) > 0 | ||
| } | ||
|
|
||
| // SetReadOffset sets the read offset. | ||
| // It is only needed for the crypto stream. | ||
| // It must not be called concurrently with any other stream methods, especially Read and Write. | ||
| func (s *cryptoStreamImpl) setReadOffset(offset protocol.ByteCount) { | ||
| s.receiveStream.readOffset = offset | ||
| s.receiveStream.frameQueue.readPos = offset | ||
| func (s *cryptoStreamImpl) PopCryptoFrame(maxLen protocol.ByteCount) *wire.CryptoFrame { | ||
| f := &wire.CryptoFrame{Offset: s.writeOffset} | ||
| n := utils.MinByteCount(f.MaxDataLen(maxLen), protocol.ByteCount(len(s.writeBuf))) | ||
| f.Data = s.writeBuf[:n] | ||
| s.writeBuf = s.writeBuf[n:] | ||
| s.writeOffset += n | ||
| return f | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,55 @@ | ||
| package quic | ||
|
|
||
| import ( | ||
| "fmt" | ||
|
|
||
| "github.com/lucas-clemente/quic-go/internal/protocol" | ||
| "github.com/lucas-clemente/quic-go/internal/wire" | ||
| ) | ||
|
|
||
| type cryptoDataHandler interface { | ||
| HandleData([]byte, protocol.EncryptionLevel) error | ||
| } | ||
|
|
||
| type cryptoStreamManager struct { | ||
| cryptoHandler cryptoDataHandler | ||
|
|
||
| initialStream cryptoStream | ||
| handshakeStream cryptoStream | ||
| } | ||
|
|
||
| func newCryptoStreamManager( | ||
| cryptoHandler cryptoDataHandler, | ||
| initialStream cryptoStream, | ||
| handshakeStream cryptoStream, | ||
| ) *cryptoStreamManager { | ||
| return &cryptoStreamManager{ | ||
| cryptoHandler: cryptoHandler, | ||
| initialStream: initialStream, | ||
| handshakeStream: handshakeStream, | ||
| } | ||
| } | ||
|
|
||
| func (m *cryptoStreamManager) HandleCryptoFrame(frame *wire.CryptoFrame, encLevel protocol.EncryptionLevel) error { | ||
| var str cryptoStream | ||
| switch encLevel { | ||
| case protocol.EncryptionInitial: | ||
| str = m.initialStream | ||
| case protocol.EncryptionHandshake: | ||
| str = m.handshakeStream | ||
| default: | ||
| return fmt.Errorf("received CRYPTO frame with unexpected encryption level: %s", encLevel) | ||
| } | ||
| if err := str.HandleCryptoFrame(frame); err != nil { | ||
| return err | ||
| } | ||
| for { | ||
| data := str.GetCryptoData() | ||
| if data == nil { | ||
| return nil | ||
| } | ||
| if err := m.cryptoHandler.HandleData(data, encLevel); err != nil { | ||
| return err | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,65 @@ | ||
| package quic | ||
|
|
||
| import ( | ||
| "errors" | ||
|
|
||
| "github.com/golang/mock/gomock" | ||
| "github.com/lucas-clemente/quic-go/internal/protocol" | ||
| "github.com/lucas-clemente/quic-go/internal/wire" | ||
|
|
||
| . "github.com/onsi/ginkgo" | ||
| . "github.com/onsi/gomega" | ||
| ) | ||
|
|
||
| var _ = Describe("Crypto Stream Manager", func() { | ||
| var ( | ||
| csm *cryptoStreamManager | ||
| cs *MockCryptoDataHandler | ||
| ) | ||
|
|
||
| BeforeEach(func() { | ||
| initialStream := newCryptoStream() | ||
| handshakeStream := newCryptoStream() | ||
| cs = NewMockCryptoDataHandler(mockCtrl) | ||
| csm = newCryptoStreamManager(cs, initialStream, handshakeStream) | ||
| }) | ||
|
|
||
| It("handles in in-order crypto frame", func() { | ||
| f := &wire.CryptoFrame{Data: []byte("foobar")} | ||
| cs.EXPECT().HandleData([]byte("foobar"), protocol.EncryptionInitial) | ||
| Expect(csm.HandleCryptoFrame(f, protocol.EncryptionInitial)).To(Succeed()) | ||
| }) | ||
|
|
||
| It("errors for unknown encryption levels", func() { | ||
| err := csm.HandleCryptoFrame(&wire.CryptoFrame{}, protocol.Encryption1RTT) | ||
| Expect(err).To(MatchError("received CRYPTO frame with unexpected encryption level: 1-RTT")) | ||
| }) | ||
|
|
||
| It("handles out-of-order crypto frames", func() { | ||
| f1 := &wire.CryptoFrame{Data: []byte("foo")} | ||
| f2 := &wire.CryptoFrame{ | ||
| Offset: 3, | ||
| Data: []byte("bar"), | ||
| } | ||
| gomock.InOrder( | ||
| cs.EXPECT().HandleData([]byte("foo"), protocol.EncryptionInitial), | ||
| cs.EXPECT().HandleData([]byte("bar"), protocol.EncryptionInitial), | ||
| ) | ||
| Expect(csm.HandleCryptoFrame(f1, protocol.EncryptionInitial)).To(Succeed()) | ||
| Expect(csm.HandleCryptoFrame(f2, protocol.EncryptionInitial)).To(Succeed()) | ||
| }) | ||
|
|
||
| It("handles handshake data", func() { | ||
| f := &wire.CryptoFrame{Data: []byte("foobar")} | ||
| cs.EXPECT().HandleData([]byte("foobar"), protocol.EncryptionHandshake) | ||
| Expect(csm.HandleCryptoFrame(f, protocol.EncryptionHandshake)).To(Succeed()) | ||
| }) | ||
|
|
||
| It("returns the error if handling crypto data fails", func() { | ||
| testErr := errors.New("test error") | ||
| f := &wire.CryptoFrame{Data: []byte("foobar")} | ||
| cs.EXPECT().HandleData([]byte("foobar"), protocol.EncryptionHandshake).Return(testErr) | ||
| err := csm.HandleCryptoFrame(f, protocol.EncryptionHandshake) | ||
| Expect(err).To(MatchError(testErr)) | ||
| }) | ||
| }) |
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