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session_test.go
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session_test.go
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package quic
import (
"bytes"
"context"
"crypto/rand"
"crypto/tls"
"errors"
"fmt"
"net"
"runtime/pprof"
"strings"
"time"
"github.com/lucas-clemente/quic-go/internal/ackhandler"
"github.com/lucas-clemente/quic-go/internal/handshake"
"github.com/lucas-clemente/quic-go/internal/mocks"
mockackhandler "github.com/lucas-clemente/quic-go/internal/mocks/ackhandler"
"github.com/lucas-clemente/quic-go/internal/protocol"
"github.com/lucas-clemente/quic-go/internal/qerr"
"github.com/lucas-clemente/quic-go/internal/testutils"
"github.com/lucas-clemente/quic-go/internal/utils"
"github.com/lucas-clemente/quic-go/internal/wire"
"github.com/lucas-clemente/quic-go/qlog"
"github.com/golang/mock/gomock"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
)
func areSessionsRunning() bool {
var b bytes.Buffer
pprof.Lookup("goroutine").WriteTo(&b, 1)
return strings.Contains(b.String(), "quic-go.(*session).run")
}
func areClosedSessionsRunning() bool {
var b bytes.Buffer
pprof.Lookup("goroutine").WriteTo(&b, 1)
return strings.Contains(b.String(), "quic-go.(*closedLocalSession).run")
}
var _ = Describe("Session", func() {
var (
sess *session
sessionRunner *MockSessionRunner
mconn *MockConnection
streamManager *MockStreamManager
packer *MockPacker
cryptoSetup *mocks.MockCryptoSetup
qlogger *mocks.MockTracer
)
remoteAddr := &net.UDPAddr{IP: net.IPv4(127, 0, 0, 1), Port: 1337}
localAddr := &net.UDPAddr{IP: net.IPv4(127, 0, 0, 1), Port: 7331}
srcConnID := protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8}
destConnID := protocol.ConnectionID{8, 7, 6, 5, 4, 3, 2, 1}
clientDestConnID := protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
getPacket := func(pn protocol.PacketNumber) *packedPacket {
buffer := getPacketBuffer()
buffer.Data = append(buffer.Data, []byte("foobar")...)
return &packedPacket{
buffer: buffer,
packetContents: &packetContents{
header: &wire.ExtendedHeader{PacketNumber: pn},
length: 6, // foobar
},
}
}
expectReplaceWithClosed := func() {
sessionRunner.EXPECT().ReplaceWithClosed(clientDestConnID, gomock.Any()).MaxTimes(1)
sessionRunner.EXPECT().ReplaceWithClosed(srcConnID, gomock.Any()).Do(func(_ protocol.ConnectionID, s packetHandler) {
Expect(s).To(BeAssignableToTypeOf(&closedLocalSession{}))
s.shutdown()
Eventually(areClosedSessionsRunning).Should(BeFalse())
})
}
BeforeEach(func() {
Eventually(areSessionsRunning).Should(BeFalse())
sessionRunner = NewMockSessionRunner(mockCtrl)
mconn = NewMockConnection(mockCtrl)
mconn.EXPECT().RemoteAddr().Return(remoteAddr).AnyTimes()
mconn.EXPECT().LocalAddr().Return(localAddr).AnyTimes()
tokenGenerator, err := handshake.NewTokenGenerator()
Expect(err).ToNot(HaveOccurred())
qlogger = mocks.NewMockTracer(mockCtrl)
qlogger.EXPECT().SentTransportParameters(gomock.Any())
qlogger.EXPECT().UpdatedKeyFromTLS(gomock.Any(), gomock.Any()).AnyTimes()
sess = newSession(
mconn,
sessionRunner,
nil,
nil,
clientDestConnID,
destConnID,
srcConnID,
[16]byte{},
populateServerConfig(&Config{}),
nil, // tls.Config
tokenGenerator,
false,
qlogger,
utils.DefaultLogger,
protocol.VersionTLS,
).(*session)
streamManager = NewMockStreamManager(mockCtrl)
sess.streamsMap = streamManager
packer = NewMockPacker(mockCtrl)
sess.packer = packer
cryptoSetup = mocks.NewMockCryptoSetup(mockCtrl)
sess.cryptoStreamHandler = cryptoSetup
sess.handshakeComplete = true
sess.idleTimeout = time.Hour
})
AfterEach(func() {
Eventually(areSessionsRunning).Should(BeFalse())
})
Context("frame handling", func() {
Context("handling STREAM frames", func() {
It("passes STREAM frames to the stream", func() {
f := &wire.StreamFrame{
StreamID: 5,
Data: []byte{0xde, 0xca, 0xfb, 0xad},
}
str := NewMockReceiveStreamI(mockCtrl)
str.EXPECT().handleStreamFrame(f)
streamManager.EXPECT().GetOrOpenReceiveStream(protocol.StreamID(5)).Return(str, nil)
Expect(sess.handleStreamFrame(f)).To(Succeed())
})
It("returns errors", func() {
testErr := errors.New("test err")
f := &wire.StreamFrame{
StreamID: 5,
Data: []byte{0xde, 0xca, 0xfb, 0xad},
}
str := NewMockReceiveStreamI(mockCtrl)
str.EXPECT().handleStreamFrame(f).Return(testErr)
streamManager.EXPECT().GetOrOpenReceiveStream(protocol.StreamID(5)).Return(str, nil)
Expect(sess.handleStreamFrame(f)).To(MatchError(testErr))
})
It("ignores STREAM frames for closed streams", func() {
streamManager.EXPECT().GetOrOpenReceiveStream(protocol.StreamID(5)).Return(nil, nil) // for closed streams, the streamManager returns nil
Expect(sess.handleStreamFrame(&wire.StreamFrame{
StreamID: 5,
Data: []byte("foobar"),
})).To(Succeed())
})
})
Context("handling ACK frames", func() {
It("informs the SentPacketHandler about ACKs", func() {
f := &wire.AckFrame{AckRanges: []wire.AckRange{{Smallest: 2, Largest: 3}}}
sph := mockackhandler.NewMockSentPacketHandler(mockCtrl)
sph.EXPECT().ReceivedAck(f, protocol.EncryptionHandshake, gomock.Any())
sess.sentPacketHandler = sph
err := sess.handleAckFrame(f, protocol.EncryptionHandshake)
Expect(err).ToNot(HaveOccurred())
})
})
Context("handling RESET_STREAM frames", func() {
It("closes the streams for writing", func() {
f := &wire.ResetStreamFrame{
StreamID: 555,
ErrorCode: 42,
ByteOffset: 0x1337,
}
str := NewMockReceiveStreamI(mockCtrl)
streamManager.EXPECT().GetOrOpenReceiveStream(protocol.StreamID(555)).Return(str, nil)
str.EXPECT().handleResetStreamFrame(f)
err := sess.handleResetStreamFrame(f)
Expect(err).ToNot(HaveOccurred())
})
It("returns errors", func() {
f := &wire.ResetStreamFrame{
StreamID: 7,
ByteOffset: 0x1337,
}
testErr := errors.New("flow control violation")
str := NewMockReceiveStreamI(mockCtrl)
streamManager.EXPECT().GetOrOpenReceiveStream(protocol.StreamID(7)).Return(str, nil)
str.EXPECT().handleResetStreamFrame(f).Return(testErr)
err := sess.handleResetStreamFrame(f)
Expect(err).To(MatchError(testErr))
})
It("ignores RESET_STREAM frames for closed streams", func() {
streamManager.EXPECT().GetOrOpenReceiveStream(protocol.StreamID(3)).Return(nil, nil)
Expect(sess.handleFrame(&wire.ResetStreamFrame{
StreamID: 3,
ErrorCode: 42,
}, protocol.EncryptionUnspecified)).To(Succeed())
})
})
Context("handling MAX_DATA and MAX_STREAM_DATA frames", func() {
var connFC *mocks.MockConnectionFlowController
BeforeEach(func() {
connFC = mocks.NewMockConnectionFlowController(mockCtrl)
sess.connFlowController = connFC
})
It("updates the flow control window of a stream", func() {
f := &wire.MaxStreamDataFrame{
StreamID: 12345,
ByteOffset: 0x1337,
}
str := NewMockSendStreamI(mockCtrl)
streamManager.EXPECT().GetOrOpenSendStream(protocol.StreamID(12345)).Return(str, nil)
str.EXPECT().handleMaxStreamDataFrame(f)
err := sess.handleMaxStreamDataFrame(f)
Expect(err).ToNot(HaveOccurred())
})
It("updates the flow control window of the connection", func() {
offset := protocol.ByteCount(0x800000)
connFC.EXPECT().UpdateSendWindow(offset)
sess.handleMaxDataFrame(&wire.MaxDataFrame{ByteOffset: offset})
})
It("ignores MAX_STREAM_DATA frames for a closed stream", func() {
streamManager.EXPECT().GetOrOpenSendStream(protocol.StreamID(10)).Return(nil, nil)
Expect(sess.handleFrame(&wire.MaxStreamDataFrame{
StreamID: 10,
ByteOffset: 1337,
}, protocol.EncryptionUnspecified)).To(Succeed())
})
})
Context("handling MAX_STREAM_ID frames", func() {
It("passes the frame to the streamsMap", func() {
f := &wire.MaxStreamsFrame{
Type: protocol.StreamTypeUni,
MaxStreamNum: 10,
}
streamManager.EXPECT().HandleMaxStreamsFrame(f)
err := sess.handleMaxStreamsFrame(f)
Expect(err).ToNot(HaveOccurred())
})
It("returns errors", func() {
f := &wire.MaxStreamsFrame{MaxStreamNum: 10}
testErr := errors.New("test error")
streamManager.EXPECT().HandleMaxStreamsFrame(f).Return(testErr)
err := sess.handleMaxStreamsFrame(f)
Expect(err).To(MatchError(testErr))
})
})
Context("handling STOP_SENDING frames", func() {
It("passes the frame to the stream", func() {
f := &wire.StopSendingFrame{
StreamID: 5,
ErrorCode: 10,
}
str := NewMockSendStreamI(mockCtrl)
streamManager.EXPECT().GetOrOpenSendStream(protocol.StreamID(5)).Return(str, nil)
str.EXPECT().handleStopSendingFrame(f)
err := sess.handleStopSendingFrame(f)
Expect(err).ToNot(HaveOccurred())
})
It("ignores STOP_SENDING frames for a closed stream", func() {
streamManager.EXPECT().GetOrOpenSendStream(protocol.StreamID(3)).Return(nil, nil)
Expect(sess.handleFrame(&wire.StopSendingFrame{
StreamID: 3,
ErrorCode: 1337,
}, protocol.EncryptionUnspecified)).To(Succeed())
})
})
It("handles NEW_CONNECTION_ID frames", func() {
Expect(sess.handleFrame(&wire.NewConnectionIDFrame{
SequenceNumber: 10,
ConnectionID: protocol.ConnectionID{1, 2, 3, 4},
}, protocol.Encryption1RTT)).To(Succeed())
Expect(sess.connIDManager.queue.Back().Value.ConnectionID).To(Equal(protocol.ConnectionID{1, 2, 3, 4}))
})
It("handles PING frames", func() {
err := sess.handleFrame(&wire.PingFrame{}, protocol.EncryptionUnspecified)
Expect(err).NotTo(HaveOccurred())
})
It("rejects PATH_RESPONSE frames", func() {
err := sess.handleFrame(&wire.PathResponseFrame{Data: [8]byte{1, 2, 3, 4, 5, 6, 7, 8}}, protocol.EncryptionUnspecified)
Expect(err).To(MatchError("unexpected PATH_RESPONSE frame"))
})
It("handles PATH_CHALLENGE frames", func() {
data := [8]byte{1, 2, 3, 4, 5, 6, 7, 8}
err := sess.handleFrame(&wire.PathChallengeFrame{Data: data}, protocol.EncryptionUnspecified)
Expect(err).ToNot(HaveOccurred())
frames, _ := sess.framer.AppendControlFrames(nil, 1000)
Expect(frames).To(Equal([]ackhandler.Frame{{Frame: &wire.PathResponseFrame{Data: data}}}))
})
It("rejects NEW_TOKEN frames", func() {
err := sess.handleNewTokenFrame(&wire.NewTokenFrame{})
Expect(err).To(HaveOccurred())
Expect(err).To(BeAssignableToTypeOf(&qerr.QuicError{}))
Expect(err.(*qerr.QuicError).ErrorCode).To(Equal(qerr.ProtocolViolation))
})
It("handles BLOCKED frames", func() {
err := sess.handleFrame(&wire.DataBlockedFrame{}, protocol.EncryptionUnspecified)
Expect(err).NotTo(HaveOccurred())
})
It("handles STREAM_BLOCKED frames", func() {
err := sess.handleFrame(&wire.StreamDataBlockedFrame{}, protocol.EncryptionUnspecified)
Expect(err).NotTo(HaveOccurred())
})
It("handles STREAM_ID_BLOCKED frames", func() {
err := sess.handleFrame(&wire.StreamsBlockedFrame{}, protocol.EncryptionUnspecified)
Expect(err).NotTo(HaveOccurred())
})
It("handles CONNECTION_CLOSE frames, with a transport error code", func() {
testErr := qerr.NewError(qerr.StreamLimitError, "foobar")
streamManager.EXPECT().CloseWithError(testErr)
sessionRunner.EXPECT().ReplaceWithClosed(srcConnID, gomock.Any()).Do(func(_ protocol.ConnectionID, s packetHandler) {
Expect(s).To(BeAssignableToTypeOf(&closedRemoteSession{}))
})
sessionRunner.EXPECT().ReplaceWithClosed(clientDestConnID, gomock.Any()).Do(func(_ protocol.ConnectionID, s packetHandler) {
Expect(s).To(BeAssignableToTypeOf(&closedRemoteSession{}))
})
cryptoSetup.EXPECT().Close()
qlogger.EXPECT().Export()
go func() {
defer GinkgoRecover()
cryptoSetup.EXPECT().RunHandshake().MaxTimes(1)
Expect(sess.run()).To(MatchError(testErr))
}()
Expect(sess.handleFrame(&wire.ConnectionCloseFrame{
ErrorCode: qerr.StreamLimitError,
ReasonPhrase: "foobar",
}, protocol.EncryptionUnspecified)).To(Succeed())
Eventually(sess.Context().Done()).Should(BeClosed())
})
It("handles CONNECTION_CLOSE frames, with an application error code", func() {
testErr := qerr.NewApplicationError(0x1337, "foobar")
streamManager.EXPECT().CloseWithError(testErr)
sessionRunner.EXPECT().ReplaceWithClosed(srcConnID, gomock.Any()).Do(func(_ protocol.ConnectionID, s packetHandler) {
Expect(s).To(BeAssignableToTypeOf(&closedRemoteSession{}))
})
sessionRunner.EXPECT().ReplaceWithClosed(clientDestConnID, gomock.Any()).Do(func(_ protocol.ConnectionID, s packetHandler) {
Expect(s).To(BeAssignableToTypeOf(&closedRemoteSession{}))
})
cryptoSetup.EXPECT().Close()
qlogger.EXPECT().Export()
go func() {
defer GinkgoRecover()
cryptoSetup.EXPECT().RunHandshake().MaxTimes(1)
Expect(sess.run()).To(MatchError(testErr))
}()
ccf := &wire.ConnectionCloseFrame{
ErrorCode: 0x1337,
ReasonPhrase: "foobar",
IsApplicationError: true,
}
Expect(sess.handleFrame(ccf, protocol.EncryptionUnspecified)).To(Succeed())
Eventually(sess.Context().Done()).Should(BeClosed())
})
It("errors on HANDSHAKE_DONE frames", func() {
Expect(sess.handleHandshakeDoneFrame()).To(MatchError("PROTOCOL_VIOLATION: received a HANDSHAKE_DONE frame"))
})
})
It("tells its versions", func() {
sess.version = 4242
Expect(sess.GetVersion()).To(Equal(protocol.VersionNumber(4242)))
})
Context("closing", func() {
var (
runErr chan error
expectedRunErr error
)
BeforeEach(func() {
runErr = make(chan error, 1)
expectedRunErr = nil
})
AfterEach(func() {
if expectedRunErr != nil {
Eventually(runErr).Should(Receive(MatchError(expectedRunErr)))
} else {
Eventually(runErr).Should(Receive())
}
})
runSession := func() {
go func() {
defer GinkgoRecover()
cryptoSetup.EXPECT().RunHandshake().MaxTimes(1)
runErr <- sess.run()
}()
Eventually(areSessionsRunning).Should(BeTrue())
}
It("shuts down without error", func() {
sess.handshakeComplete = true
runSession()
streamManager.EXPECT().CloseWithError(qerr.NewApplicationError(0, ""))
expectReplaceWithClosed()
cryptoSetup.EXPECT().Close()
buffer := getPacketBuffer()
buffer.Data = append(buffer.Data, []byte("connection close")...)
packer.EXPECT().PackConnectionClose(gomock.Any()).DoAndReturn(func(quicErr *qerr.QuicError) (*coalescedPacket, error) {
Expect(quicErr.ErrorCode).To(BeEquivalentTo(qerr.NoError))
Expect(quicErr.ErrorMessage).To(BeEmpty())
return &coalescedPacket{buffer: buffer}, nil
})
mconn.EXPECT().Write([]byte("connection close"))
qlogger.EXPECT().Export()
sess.shutdown()
Eventually(areSessionsRunning).Should(BeFalse())
Expect(sess.Context().Done()).To(BeClosed())
})
It("only closes once", func() {
runSession()
streamManager.EXPECT().CloseWithError(gomock.Any())
expectReplaceWithClosed()
cryptoSetup.EXPECT().Close()
packer.EXPECT().PackConnectionClose(gomock.Any()).Return(&coalescedPacket{buffer: getPacketBuffer()}, nil)
mconn.EXPECT().Write(gomock.Any())
qlogger.EXPECT().Export()
sess.shutdown()
sess.shutdown()
Eventually(areSessionsRunning).Should(BeFalse())
Expect(sess.Context().Done()).To(BeClosed())
})
It("closes with an error", func() {
runSession()
streamManager.EXPECT().CloseWithError(qerr.NewApplicationError(0x1337, "test error"))
expectReplaceWithClosed()
cryptoSetup.EXPECT().Close()
packer.EXPECT().PackConnectionClose(gomock.Any()).DoAndReturn(func(quicErr *qerr.QuicError) (*coalescedPacket, error) {
Expect(quicErr.IsApplicationError()).To(BeTrue())
Expect(quicErr.ErrorCode).To(BeEquivalentTo(0x1337))
Expect(quicErr.ErrorMessage).To(Equal("test error"))
return &coalescedPacket{buffer: getPacketBuffer()}, nil
})
mconn.EXPECT().Write(gomock.Any())
qlogger.EXPECT().Export()
sess.CloseWithError(0x1337, "test error")
Eventually(areSessionsRunning).Should(BeFalse())
Expect(sess.Context().Done()).To(BeClosed())
})
It("includes the frame type in transport-level close frames", func() {
runSession()
testErr := qerr.NewErrorWithFrameType(0x1337, 0x42, "test error")
streamManager.EXPECT().CloseWithError(testErr)
expectReplaceWithClosed()
cryptoSetup.EXPECT().Close()
packer.EXPECT().PackConnectionClose(gomock.Any()).DoAndReturn(func(quicErr *qerr.QuicError) (*coalescedPacket, error) {
Expect(quicErr.IsApplicationError()).To(BeFalse())
Expect(quicErr.FrameType).To(BeEquivalentTo(0x42))
Expect(quicErr.ErrorCode).To(BeEquivalentTo(0x1337))
Expect(quicErr.ErrorMessage).To(Equal("test error"))
return &coalescedPacket{buffer: getPacketBuffer()}, nil
})
mconn.EXPECT().Write(gomock.Any())
qlogger.EXPECT().Export()
sess.closeLocal(testErr)
Eventually(areSessionsRunning).Should(BeFalse())
Expect(sess.Context().Done()).To(BeClosed())
})
It("closes the session in order to recreate it", func() {
runSession()
streamManager.EXPECT().CloseWithError(gomock.Any())
sessionRunner.EXPECT().Remove(gomock.Any()).AnyTimes()
cryptoSetup.EXPECT().Close()
// don't EXPECT any calls to mconn.Write()
// don't EXPECT any call to qlogger.Export()
sess.closeForRecreating()
Eventually(areSessionsRunning).Should(BeFalse())
expectedRunErr = errCloseForRecreating
})
It("destroys the session", func() {
runSession()
testErr := errors.New("close")
streamManager.EXPECT().CloseWithError(gomock.Any())
sessionRunner.EXPECT().Remove(gomock.Any()).AnyTimes()
cryptoSetup.EXPECT().Close()
// don't EXPECT any calls to mconn.Write()
qlogger.EXPECT().Export()
sess.destroy(testErr)
Eventually(areSessionsRunning).Should(BeFalse())
expectedRunErr = testErr
})
It("cancels the context when the run loop exists", func() {
runSession()
streamManager.EXPECT().CloseWithError(gomock.Any())
expectReplaceWithClosed()
cryptoSetup.EXPECT().Close()
packer.EXPECT().PackConnectionClose(gomock.Any()).Return(&coalescedPacket{buffer: getPacketBuffer()}, nil)
returned := make(chan struct{})
go func() {
defer GinkgoRecover()
ctx := sess.Context()
<-ctx.Done()
Expect(ctx.Err()).To(MatchError(context.Canceled))
close(returned)
}()
Consistently(returned).ShouldNot(BeClosed())
mconn.EXPECT().Write(gomock.Any())
qlogger.EXPECT().Export()
sess.shutdown()
Eventually(returned).Should(BeClosed())
})
It("doesn't send any more packets after receiving a CONNECTION_CLOSE", func() {
unpacker := NewMockUnpacker(mockCtrl)
sess.handshakeConfirmed = true
sess.unpacker = unpacker
runSession()
cryptoSetup.EXPECT().Close()
streamManager.EXPECT().CloseWithError(gomock.Any())
sessionRunner.EXPECT().ReplaceWithClosed(gomock.Any(), gomock.Any()).AnyTimes()
buf := &bytes.Buffer{}
hdr := &wire.ExtendedHeader{
Header: wire.Header{DestConnectionID: srcConnID},
PacketNumberLen: protocol.PacketNumberLen2,
}
Expect(hdr.Write(buf, sess.version)).To(Succeed())
unpacker.EXPECT().Unpack(gomock.Any(), gomock.Any(), gomock.Any()).DoAndReturn(func(*wire.Header, time.Time, []byte) (*unpackedPacket, error) {
buf := &bytes.Buffer{}
Expect((&wire.ConnectionCloseFrame{ErrorCode: qerr.StreamLimitError}).Write(buf, sess.version)).To(Succeed())
return &unpackedPacket{
hdr: hdr,
data: buf.Bytes(),
encryptionLevel: protocol.Encryption1RTT,
}, nil
})
gomock.InOrder(
qlogger.EXPECT().StartedConnection(gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any()),
qlogger.EXPECT().ReceivedPacket(gomock.Any(), gomock.Any(), gomock.Any()),
qlogger.EXPECT().Export(),
)
// don't EXPECT any calls to packer.PackPacket()
sess.handlePacket(&receivedPacket{
rcvTime: time.Now(),
remoteAddr: &net.UDPAddr{},
buffer: getPacketBuffer(),
data: buf.Bytes(),
})
// Consistently(pack).ShouldNot(Receive())
Eventually(sess.Context().Done()).Should(BeClosed())
})
})
Context("receiving packets", func() {
var unpacker *MockUnpacker
BeforeEach(func() {
unpacker = NewMockUnpacker(mockCtrl)
sess.unpacker = unpacker
})
getPacket := func(extHdr *wire.ExtendedHeader, data []byte) *receivedPacket {
buf := &bytes.Buffer{}
Expect(extHdr.Write(buf, sess.version)).To(Succeed())
return &receivedPacket{
data: append(buf.Bytes(), data...),
buffer: getPacketBuffer(),
}
}
It("drops Retry packets", func() {
p := getPacket(&wire.ExtendedHeader{Header: wire.Header{
IsLongHeader: true,
Type: protocol.PacketTypeRetry,
DestConnectionID: destConnID,
SrcConnectionID: srcConnID,
Version: sess.version,
Token: []byte("foobar"),
}}, make([]byte, 16) /* Retry integrity tag */)
qlogger.EXPECT().DroppedPacket(qlog.PacketTypeRetry, protocol.ByteCount(len(p.data)), qlog.PacketDropUnexpectedPacket)
Expect(sess.handlePacketImpl(p)).To(BeFalse())
})
It("drops packets for which header decryption fails", func() {
p := getPacket(&wire.ExtendedHeader{
Header: wire.Header{
IsLongHeader: true,
Type: protocol.PacketTypeHandshake,
Version: sess.version,
},
PacketNumberLen: protocol.PacketNumberLen2,
}, nil)
p.data[0] ^= 0x40 // unset the QUIC bit
qlogger.EXPECT().DroppedPacket(qlog.PacketTypeNotDetermined, protocol.ByteCount(len(p.data)), qlog.PacketDropHeaderParseError)
Expect(sess.handlePacketImpl(p)).To(BeFalse())
})
It("drops packets for which the version is unsupported", func() {
p := getPacket(&wire.ExtendedHeader{
Header: wire.Header{
IsLongHeader: true,
Type: protocol.PacketTypeHandshake,
Version: sess.version + 1,
},
PacketNumberLen: protocol.PacketNumberLen2,
}, nil)
qlogger.EXPECT().DroppedPacket(qlog.PacketTypeNotDetermined, protocol.ByteCount(len(p.data)), qlog.PacketDropUnsupportedVersion)
Expect(sess.handlePacketImpl(p)).To(BeFalse())
})
It("drops packets with an unsupported version", func() {
origSupportedVersions := make([]protocol.VersionNumber, len(protocol.SupportedVersions))
copy(origSupportedVersions, protocol.SupportedVersions)
defer func() {
protocol.SupportedVersions = origSupportedVersions
}()
protocol.SupportedVersions = append(protocol.SupportedVersions, sess.version+1)
p := getPacket(&wire.ExtendedHeader{
Header: wire.Header{
IsLongHeader: true,
Type: protocol.PacketTypeHandshake,
DestConnectionID: destConnID,
SrcConnectionID: srcConnID,
Version: sess.version + 1,
},
PacketNumberLen: protocol.PacketNumberLen2,
}, nil)
qlogger.EXPECT().DroppedPacket(qlog.PacketTypeHandshake, protocol.ByteCount(len(p.data)), qlog.PacketDropUnexpectedVersion)
Expect(sess.handlePacketImpl(p)).To(BeFalse())
})
It("informs the ReceivedPacketHandler about non-ack-eliciting packets", func() {
hdr := &wire.ExtendedHeader{
Header: wire.Header{DestConnectionID: srcConnID},
PacketNumber: 0x37,
PacketNumberLen: protocol.PacketNumberLen1,
}
packet := getPacket(hdr, nil)
rcvTime := time.Now().Add(-10 * time.Second)
unpacker.EXPECT().Unpack(gomock.Any(), rcvTime, gomock.Any()).Return(&unpackedPacket{
packetNumber: 0x1337,
encryptionLevel: protocol.EncryptionInitial,
hdr: hdr,
data: []byte{0}, // one PADDING frame
}, nil)
rph := mockackhandler.NewMockReceivedPacketHandler(mockCtrl)
gomock.InOrder(
rph.EXPECT().IsPotentiallyDuplicate(protocol.PacketNumber(0x1337), protocol.EncryptionInitial),
rph.EXPECT().ReceivedPacket(protocol.PacketNumber(0x1337), protocol.EncryptionInitial, rcvTime, false),
)
sess.receivedPacketHandler = rph
packet.rcvTime = rcvTime
qlogger.EXPECT().StartedConnection(gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any())
qlogger.EXPECT().ReceivedPacket(hdr, protocol.ByteCount(len(packet.data)), nil)
Expect(sess.handlePacketImpl(packet)).To(BeTrue())
})
It("informs the ReceivedPacketHandler about ack-eliciting packets", func() {
hdr := &wire.ExtendedHeader{
Header: wire.Header{DestConnectionID: srcConnID},
PacketNumber: 0x37,
PacketNumberLen: protocol.PacketNumberLen1,
}
rcvTime := time.Now().Add(-10 * time.Second)
buf := &bytes.Buffer{}
Expect((&wire.PingFrame{}).Write(buf, sess.version)).To(Succeed())
packet := getPacket(hdr, nil)
unpacker.EXPECT().Unpack(gomock.Any(), rcvTime, gomock.Any()).Return(&unpackedPacket{
packetNumber: 0x1337,
encryptionLevel: protocol.Encryption1RTT,
hdr: hdr,
data: buf.Bytes(),
}, nil)
rph := mockackhandler.NewMockReceivedPacketHandler(mockCtrl)
gomock.InOrder(
rph.EXPECT().IsPotentiallyDuplicate(protocol.PacketNumber(0x1337), protocol.Encryption1RTT),
rph.EXPECT().ReceivedPacket(protocol.PacketNumber(0x1337), protocol.Encryption1RTT, rcvTime, true),
)
sess.receivedPacketHandler = rph
packet.rcvTime = rcvTime
qlogger.EXPECT().StartedConnection(gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any())
qlogger.EXPECT().ReceivedPacket(hdr, protocol.ByteCount(len(packet.data)), []wire.Frame{&wire.PingFrame{}})
Expect(sess.handlePacketImpl(packet)).To(BeTrue())
})
It("drops duplicate packets", func() {
hdr := &wire.ExtendedHeader{
Header: wire.Header{DestConnectionID: srcConnID},
PacketNumber: 0x37,
PacketNumberLen: protocol.PacketNumberLen1,
}
packet := getPacket(hdr, nil)
unpacker.EXPECT().Unpack(gomock.Any(), gomock.Any(), gomock.Any()).Return(&unpackedPacket{
packetNumber: 0x1337,
encryptionLevel: protocol.Encryption1RTT,
hdr: hdr,
data: []byte("foobar"),
}, nil)
rph := mockackhandler.NewMockReceivedPacketHandler(mockCtrl)
rph.EXPECT().IsPotentiallyDuplicate(protocol.PacketNumber(0x1337), protocol.Encryption1RTT).Return(true)
sess.receivedPacketHandler = rph
qlogger.EXPECT().DroppedPacket(qlog.PacketType1RTT, protocol.ByteCount(len(packet.data)), qlog.PacketDropDuplicate)
Expect(sess.handlePacketImpl(packet)).To(BeFalse())
})
It("drops a packet when unpacking fails", func() {
unpacker.EXPECT().Unpack(gomock.Any(), gomock.Any(), gomock.Any()).Return(nil, handshake.ErrDecryptionFailed)
streamManager.EXPECT().CloseWithError(gomock.Any())
cryptoSetup.EXPECT().Close()
packer.EXPECT().PackConnectionClose(gomock.Any()).Return(&coalescedPacket{buffer: getPacketBuffer()}, nil)
go func() {
defer GinkgoRecover()
cryptoSetup.EXPECT().RunHandshake().MaxTimes(1)
sess.run()
}()
expectReplaceWithClosed()
p := getPacket(&wire.ExtendedHeader{
Header: wire.Header{
IsLongHeader: true,
Type: protocol.PacketTypeHandshake,
DestConnectionID: srcConnID,
Version: sess.version,
Length: 2 + 6,
},
PacketNumber: 0x1337,
PacketNumberLen: protocol.PacketNumberLen2,
}, []byte("foobar"))
qlogger.EXPECT().DroppedPacket(qlog.PacketTypeHandshake, protocol.ByteCount(len(p.data)), qlog.PacketDropPayloadDecryptError)
sess.handlePacket(p)
Consistently(sess.Context().Done()).ShouldNot(BeClosed())
// make the go routine return
qlogger.EXPECT().Export()
mconn.EXPECT().Write(gomock.Any())
sess.closeLocal(errors.New("close"))
Eventually(sess.Context().Done()).Should(BeClosed())
})
It("closes the session when unpacking fails because the reserved bits were incorrect", func() {
unpacker.EXPECT().Unpack(gomock.Any(), gomock.Any(), gomock.Any()).Return(nil, wire.ErrInvalidReservedBits)
streamManager.EXPECT().CloseWithError(gomock.Any())
cryptoSetup.EXPECT().Close()
packer.EXPECT().PackConnectionClose(gomock.Any()).Return(&coalescedPacket{buffer: getPacketBuffer()}, nil)
done := make(chan struct{})
go func() {
defer GinkgoRecover()
cryptoSetup.EXPECT().RunHandshake().MaxTimes(1)
err := sess.run()
Expect(err).To(HaveOccurred())
Expect(err.(*qerr.QuicError).ErrorCode).To(Equal(qerr.ProtocolViolation))
close(done)
}()
expectReplaceWithClosed()
mconn.EXPECT().Write(gomock.Any())
packet := getPacket(&wire.ExtendedHeader{
Header: wire.Header{DestConnectionID: srcConnID},
PacketNumberLen: protocol.PacketNumberLen1,
}, nil)
qlogger.EXPECT().Export()
sess.handlePacket(packet)
Eventually(sess.Context().Done()).Should(BeClosed())
})
It("ignores packets when unpacking fails for any other reason", func() {
testErr := errors.New("test err")
unpacker.EXPECT().Unpack(gomock.Any(), gomock.Any(), gomock.Any()).Return(nil, testErr)
streamManager.EXPECT().CloseWithError(gomock.Any())
cryptoSetup.EXPECT().Close()
packer.EXPECT().PackConnectionClose(gomock.Any()).Return(&coalescedPacket{buffer: getPacketBuffer()}, nil)
runErr := make(chan error)
go func() {
defer GinkgoRecover()
cryptoSetup.EXPECT().RunHandshake().MaxTimes(1)
runErr <- sess.run()
}()
expectReplaceWithClosed()
qlogger.EXPECT().DroppedPacket(qlog.PacketType1RTT, gomock.Any(), qlog.PacketDropPayloadDecryptError)
sess.handlePacket(getPacket(&wire.ExtendedHeader{
Header: wire.Header{DestConnectionID: srcConnID},
PacketNumberLen: protocol.PacketNumberLen1,
}, nil))
Consistently(runErr).ShouldNot(Receive())
// make the go routine return
qlogger.EXPECT().Export()
mconn.EXPECT().Write(gomock.Any())
sess.shutdown()
Eventually(sess.Context().Done()).Should(BeClosed())
})
It("rejects packets with empty payload", func() {
unpacker.EXPECT().Unpack(gomock.Any(), gomock.Any(), gomock.Any()).Return(&unpackedPacket{
hdr: &wire.ExtendedHeader{},
data: []byte{}, // no payload
encryptionLevel: protocol.Encryption1RTT,
}, nil)
streamManager.EXPECT().CloseWithError(gomock.Any())
cryptoSetup.EXPECT().Close()
packer.EXPECT().PackConnectionClose(gomock.Any()).Return(&coalescedPacket{buffer: getPacketBuffer()}, nil)
done := make(chan struct{})
go func() {
defer GinkgoRecover()
cryptoSetup.EXPECT().RunHandshake().MaxTimes(1)
Expect(sess.run()).To(MatchError("PROTOCOL_VIOLATION: empty packet"))
close(done)
}()
expectReplaceWithClosed()
mconn.EXPECT().Write(gomock.Any())
qlogger.EXPECT().Export()
sess.handlePacket(getPacket(&wire.ExtendedHeader{
Header: wire.Header{DestConnectionID: srcConnID},
PacketNumberLen: protocol.PacketNumberLen1,
}, nil))
Eventually(done).Should(BeClosed())
})
It("ignores packets with a different source connection ID", func() {
hdr1 := &wire.ExtendedHeader{
Header: wire.Header{
IsLongHeader: true,
Type: protocol.PacketTypeHandshake,
DestConnectionID: destConnID,
SrcConnectionID: srcConnID,
Length: 1,
Version: sess.version,
},
PacketNumberLen: protocol.PacketNumberLen1,
PacketNumber: 1,
}
hdr2 := &wire.ExtendedHeader{
Header: wire.Header{
IsLongHeader: true,
Type: protocol.PacketTypeHandshake,
DestConnectionID: destConnID,
SrcConnectionID: protocol.ConnectionID{0xde, 0xad, 0xbe, 0xef},
Length: 1,
Version: sess.version,
},
PacketNumberLen: protocol.PacketNumberLen1,
PacketNumber: 2,
}
Expect(srcConnID).ToNot(Equal(hdr2.SrcConnectionID))
// Send one packet, which might change the connection ID.
// only EXPECT one call to the unpacker
unpacker.EXPECT().Unpack(gomock.Any(), gomock.Any(), gomock.Any()).Return(&unpackedPacket{
encryptionLevel: protocol.Encryption1RTT,
hdr: hdr1,
data: []byte{0}, // one PADDING frame
}, nil)
p1 := getPacket(hdr1, nil)
qlogger.EXPECT().StartedConnection(gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any())
qlogger.EXPECT().ReceivedPacket(gomock.Any(), protocol.ByteCount(len(p1.data)), gomock.Any())
Expect(sess.handlePacketImpl(p1)).To(BeTrue())
// The next packet has to be ignored, since the source connection ID doesn't match.
p2 := getPacket(hdr2, nil)
qlogger.EXPECT().DroppedPacket(qlog.PacketTypeHandshake, protocol.ByteCount(len(p2.data)), qlog.PacketDropUnknownConnectionID)
Expect(sess.handlePacketImpl(p2)).To(BeFalse())
})
It("queues undecryptable packets", func() {
sess.handshakeComplete = false
hdr := &wire.ExtendedHeader{
Header: wire.Header{
IsLongHeader: true,
Type: protocol.PacketTypeHandshake,
DestConnectionID: destConnID,
SrcConnectionID: srcConnID,
Length: 1,
Version: sess.version,
},
PacketNumberLen: protocol.PacketNumberLen1,
PacketNumber: 1,
}
unpacker.EXPECT().Unpack(gomock.Any(), gomock.Any(), gomock.Any()).Return(nil, handshake.ErrKeysNotYetAvailable)
packet := getPacket(hdr, nil)
qlogger.EXPECT().BufferedPacket(qlog.PacketTypeHandshake)
Expect(sess.handlePacketImpl(packet)).To(BeFalse())
Expect(sess.undecryptablePackets).To(Equal([]*receivedPacket{packet}))
})
Context("updating the remote address", func() {
It("doesn't support connection migration", func() {
unpacker.EXPECT().Unpack(gomock.Any(), gomock.Any(), gomock.Any()).Return(&unpackedPacket{
encryptionLevel: protocol.Encryption1RTT,
hdr: &wire.ExtendedHeader{},
data: []byte{0}, // one PADDING frame
}, nil)
packet := getPacket(&wire.ExtendedHeader{
Header: wire.Header{DestConnectionID: srcConnID},
PacketNumberLen: protocol.PacketNumberLen1,
}, nil)
packet.remoteAddr = &net.IPAddr{IP: net.IPv4(192, 168, 0, 100)}
qlogger.EXPECT().StartedConnection(gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any())
qlogger.EXPECT().ReceivedPacket(gomock.Any(), protocol.ByteCount(len(packet.data)), gomock.Any())
Expect(sess.handlePacketImpl(packet)).To(BeTrue())
})
})
Context("coalesced packets", func() {
BeforeEach(func() {
qlogger.EXPECT().StartedConnection(gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any()).MaxTimes(1)
})
getPacketWithLength := func(connID protocol.ConnectionID, length protocol.ByteCount) (int /* header length */, *receivedPacket) {
hdr := &wire.ExtendedHeader{
Header: wire.Header{
IsLongHeader: true,
Type: protocol.PacketTypeHandshake,
DestConnectionID: connID,
SrcConnectionID: destConnID,
Version: protocol.VersionTLS,
Length: length,
},
PacketNumberLen: protocol.PacketNumberLen3,
}
hdrLen := hdr.GetLength(sess.version)
b := make([]byte, 1)
rand.Read(b)
packet := getPacket(hdr, bytes.Repeat(b, int(length)-3))
return int(hdrLen), packet
}
It("cuts packets to the right length", func() {
hdrLen, packet := getPacketWithLength(srcConnID, 456)
unpacker.EXPECT().Unpack(gomock.Any(), gomock.Any(), gomock.Any()).DoAndReturn(func(_ *wire.Header, _ time.Time, data []byte) (*unpackedPacket, error) {
Expect(data).To(HaveLen(hdrLen + 456 - 3))
return &unpackedPacket{
encryptionLevel: protocol.EncryptionHandshake,
data: []byte{0},
hdr: &wire.ExtendedHeader{},
}, nil
})
qlogger.EXPECT().ReceivedPacket(gomock.Any(), protocol.ByteCount(len(packet.data)), gomock.Any())
Expect(sess.handlePacketImpl(packet)).To(BeTrue())
})
It("handles coalesced packets", func() {
hdrLen1, packet1 := getPacketWithLength(srcConnID, 456)
unpacker.EXPECT().Unpack(gomock.Any(), gomock.Any(), gomock.Any()).DoAndReturn(func(_ *wire.Header, _ time.Time, data []byte) (*unpackedPacket, error) {
Expect(data).To(HaveLen(hdrLen1 + 456 - 3))
return &unpackedPacket{
encryptionLevel: protocol.EncryptionHandshake,
data: []byte{0},
packetNumber: 1,
hdr: &wire.ExtendedHeader{Header: wire.Header{SrcConnectionID: destConnID}},
}, nil
})
hdrLen2, packet2 := getPacketWithLength(srcConnID, 123)
unpacker.EXPECT().Unpack(gomock.Any(), gomock.Any(), gomock.Any()).DoAndReturn(func(_ *wire.Header, _ time.Time, data []byte) (*unpackedPacket, error) {
Expect(data).To(HaveLen(hdrLen2 + 123 - 3))
return &unpackedPacket{
encryptionLevel: protocol.EncryptionHandshake,
data: []byte{0},
packetNumber: 2,
hdr: &wire.ExtendedHeader{Header: wire.Header{SrcConnectionID: destConnID}},
}, nil
})
gomock.InOrder(
qlogger.EXPECT().ReceivedPacket(gomock.Any(), protocol.ByteCount(len(packet1.data)), gomock.Any()),
qlogger.EXPECT().ReceivedPacket(gomock.Any(), protocol.ByteCount(len(packet2.data)), gomock.Any()),
)
packet1.data = append(packet1.data, packet2.data...)
Expect(sess.handlePacketImpl(packet1)).To(BeTrue())
})
It("works with undecryptable packets", func() {
sess.handshakeComplete = false
hdrLen1, packet1 := getPacketWithLength(srcConnID, 456)
hdrLen2, packet2 := getPacketWithLength(srcConnID, 123)
gomock.InOrder(
unpacker.EXPECT().Unpack(gomock.Any(), gomock.Any(), gomock.Any()).Return(nil, handshake.ErrKeysNotYetAvailable),
unpacker.EXPECT().Unpack(gomock.Any(), gomock.Any(), gomock.Any()).DoAndReturn(func(_ *wire.Header, _ time.Time, data []byte) (*unpackedPacket, error) {
Expect(data).To(HaveLen(hdrLen2 + 123 - 3))
return &unpackedPacket{
encryptionLevel: protocol.EncryptionHandshake,
data: []byte{0},
hdr: &wire.ExtendedHeader{},
}, nil
}),
)