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connection_test.go
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package quic
import (
"bytes"
"context"
"crypto/rand"
"errors"
"fmt"
"io"
"net"
"net/netip"
"runtime/pprof"
"strings"
"time"
tls "github.com/Psiphon-Labs/psiphon-tls"
"github.com/Psiphon-Labs/quic-go/internal/ackhandler"
"github.com/Psiphon-Labs/quic-go/internal/handshake"
"github.com/Psiphon-Labs/quic-go/internal/mocks"
mockackhandler "github.com/Psiphon-Labs/quic-go/internal/mocks/ackhandler"
mocklogging "github.com/Psiphon-Labs/quic-go/internal/mocks/logging"
"github.com/Psiphon-Labs/quic-go/internal/protocol"
"github.com/Psiphon-Labs/quic-go/internal/qerr"
"github.com/Psiphon-Labs/quic-go/internal/testutils"
"github.com/Psiphon-Labs/quic-go/internal/utils"
"github.com/Psiphon-Labs/quic-go/internal/wire"
"github.com/Psiphon-Labs/quic-go/logging"
. "github.com/onsi/ginkgo/v2"
. "github.com/onsi/gomega"
"go.uber.org/mock/gomock"
)
func areConnsRunning() bool {
var b bytes.Buffer
pprof.Lookup("goroutine").WriteTo(&b, 1)
return strings.Contains(b.String(), "quic-go.(*connection).run")
}
var _ = Describe("Connection", func() {
var (
conn *connection
connRunner *MockConnRunner
mconn *MockSendConn
streamManager *MockStreamManager
packer *MockPacker
cryptoSetup *mocks.MockCryptoSetup
tracer *mocklogging.MockConnectionTracer
capabilities connCapabilities
)
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.ParseConnectionID([]byte{1, 2, 3, 4, 5, 6, 7, 8})
destConnID := protocol.ParseConnectionID([]byte{8, 7, 6, 5, 4, 3, 2, 1})
clientDestConnID := protocol.ParseConnectionID([]byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10})
getCoalescedPacket := func(pn protocol.PacketNumber, isLongHeader bool) *coalescedPacket {
buffer := getPacketBuffer()
buffer.Data = append(buffer.Data, []byte("foobar")...)
packet := &coalescedPacket{buffer: buffer}
if isLongHeader {
packet.longHdrPackets = []*longHeaderPacket{{
header: &wire.ExtendedHeader{
Header: wire.Header{},
PacketNumber: pn,
},
length: 6, // foobar
}}
} else {
packet.shortHdrPacket = &shortHeaderPacket{
PacketNumber: pn,
Length: 6,
}
}
return packet
}
expectReplaceWithClosed := func() {
connRunner.EXPECT().ReplaceWithClosed(gomock.Any(), gomock.Any(), gomock.Any()).Do(func(connIDs []protocol.ConnectionID, _ protocol.Perspective, _ []byte) {
Expect(connIDs).To(ContainElement(srcConnID))
if len(connIDs) > 1 {
Expect(connIDs).To(ContainElement(clientDestConnID))
}
})
}
expectAppendPacket := func(packer *MockPacker, p shortHeaderPacket, b []byte) *PackerAppendPacketCall {
return packer.EXPECT().AppendPacket(gomock.Any(), gomock.Any(), Version1).DoAndReturn(func(buf *packetBuffer, _ protocol.ByteCount, _ protocol.VersionNumber) (shortHeaderPacket, error) {
buf.Data = append(buf.Data, b...)
return p, nil
})
}
enableGSO := func() { capabilities = connCapabilities{GSO: true} }
BeforeEach(func() {
Eventually(areConnsRunning).Should(BeFalse())
connRunner = NewMockConnRunner(mockCtrl)
mconn = NewMockSendConn(mockCtrl)
mconn.EXPECT().capabilities().DoAndReturn(func() connCapabilities { return capabilities }).AnyTimes()
mconn.EXPECT().RemoteAddr().Return(remoteAddr).AnyTimes()
mconn.EXPECT().LocalAddr().Return(localAddr).AnyTimes()
tokenGenerator := handshake.NewTokenGenerator([32]byte{0xa, 0xb, 0xc})
var tr *logging.ConnectionTracer
tr, tracer = mocklogging.NewMockConnectionTracer(mockCtrl)
tracer.EXPECT().NegotiatedVersion(gomock.Any(), gomock.Any(), gomock.Any()).MaxTimes(1)
tracer.EXPECT().SentTransportParameters(gomock.Any())
tracer.EXPECT().UpdatedKeyFromTLS(gomock.Any(), gomock.Any()).AnyTimes()
tracer.EXPECT().UpdatedCongestionState(gomock.Any())
conn = newConnection(
mconn,
connRunner,
protocol.ConnectionID{},
nil,
clientDestConnID,
destConnID,
srcConnID,
&protocol.DefaultConnectionIDGenerator{},
protocol.StatelessResetToken{},
populateServerConfig(&Config{DisablePathMTUDiscovery: true}),
&tls.Config{},
tokenGenerator,
false,
tr,
1234,
utils.DefaultLogger,
protocol.Version1,
).(*connection)
streamManager = NewMockStreamManager(mockCtrl)
conn.streamsMap = streamManager
packer = NewMockPacker(mockCtrl)
conn.packer = packer
cryptoSetup = mocks.NewMockCryptoSetup(mockCtrl)
conn.cryptoStreamHandler = cryptoSetup
conn.handshakeComplete = true
conn.idleTimeout = time.Hour
})
AfterEach(func() {
Eventually(areConnsRunning).Should(BeFalse())
capabilities = connCapabilities{}
})
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(conn.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(conn.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(conn.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())
conn.sentPacketHandler = sph
err := conn.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,
FinalSize: 0x1337,
}
str := NewMockReceiveStreamI(mockCtrl)
streamManager.EXPECT().GetOrOpenReceiveStream(protocol.StreamID(555)).Return(str, nil)
str.EXPECT().handleResetStreamFrame(f)
err := conn.handleResetStreamFrame(f)
Expect(err).ToNot(HaveOccurred())
})
It("returns errors", func() {
f := &wire.ResetStreamFrame{
StreamID: 7,
FinalSize: 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 := conn.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(conn.handleFrame(&wire.ResetStreamFrame{
StreamID: 3,
ErrorCode: 42,
}, protocol.Encryption1RTT, protocol.ConnectionID{})).To(Succeed())
})
})
Context("handling MAX_DATA and MAX_STREAM_DATA frames", func() {
var connFC *mocks.MockConnectionFlowController
BeforeEach(func() {
connFC = mocks.NewMockConnectionFlowController(mockCtrl)
conn.connFlowController = connFC
})
It("updates the flow control window of a stream", func() {
f := &wire.MaxStreamDataFrame{
StreamID: 12345,
MaximumStreamData: 0x1337,
}
str := NewMockSendStreamI(mockCtrl)
streamManager.EXPECT().GetOrOpenSendStream(protocol.StreamID(12345)).Return(str, nil)
str.EXPECT().updateSendWindow(protocol.ByteCount(0x1337))
Expect(conn.handleMaxStreamDataFrame(f)).To(Succeed())
})
It("updates the flow control window of the connection", func() {
offset := protocol.ByteCount(0x800000)
connFC.EXPECT().UpdateSendWindow(offset)
conn.handleMaxDataFrame(&wire.MaxDataFrame{MaximumData: offset})
})
It("ignores MAX_STREAM_DATA frames for a closed stream", func() {
streamManager.EXPECT().GetOrOpenSendStream(protocol.StreamID(10)).Return(nil, nil)
Expect(conn.handleFrame(&wire.MaxStreamDataFrame{
StreamID: 10,
MaximumStreamData: 1337,
}, protocol.Encryption1RTT, protocol.ConnectionID{})).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)
conn.handleMaxStreamsFrame(f)
})
})
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 := conn.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(conn.handleFrame(&wire.StopSendingFrame{
StreamID: 3,
ErrorCode: 1337,
}, protocol.Encryption1RTT, protocol.ConnectionID{})).To(Succeed())
})
})
It("handles NEW_CONNECTION_ID frames", func() {
connID := protocol.ParseConnectionID([]byte{1, 2, 3, 4})
Expect(conn.handleFrame(&wire.NewConnectionIDFrame{
SequenceNumber: 10,
ConnectionID: connID,
}, protocol.Encryption1RTT, protocol.ConnectionID{})).To(Succeed())
Expect(conn.connIDManager.queue.Back().Value.ConnectionID).To(Equal(connID))
})
It("handles PING frames", func() {
err := conn.handleFrame(&wire.PingFrame{}, protocol.Encryption1RTT, protocol.ConnectionID{})
Expect(err).NotTo(HaveOccurred())
})
It("rejects PATH_RESPONSE frames", func() {
err := conn.handleFrame(&wire.PathResponseFrame{Data: [8]byte{1, 2, 3, 4, 5, 6, 7, 8}}, protocol.Encryption1RTT, protocol.ConnectionID{})
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 := conn.handleFrame(&wire.PathChallengeFrame{Data: data}, protocol.Encryption1RTT, protocol.ConnectionID{})
Expect(err).ToNot(HaveOccurred())
frames, _ := conn.framer.AppendControlFrames(nil, 1000, protocol.Version1)
Expect(frames).To(Equal([]ackhandler.Frame{{Frame: &wire.PathResponseFrame{Data: data}}}))
})
It("rejects NEW_TOKEN frames", func() {
err := conn.handleNewTokenFrame(&wire.NewTokenFrame{})
Expect(err).To(HaveOccurred())
Expect(err).To(BeAssignableToTypeOf(&qerr.TransportError{}))
Expect(err.(*qerr.TransportError).ErrorCode).To(Equal(qerr.ProtocolViolation))
})
It("handles BLOCKED frames", func() {
err := conn.handleFrame(&wire.DataBlockedFrame{}, protocol.Encryption1RTT, protocol.ConnectionID{})
Expect(err).NotTo(HaveOccurred())
})
It("handles STREAM_BLOCKED frames", func() {
err := conn.handleFrame(&wire.StreamDataBlockedFrame{}, protocol.Encryption1RTT, protocol.ConnectionID{})
Expect(err).NotTo(HaveOccurred())
})
It("handles STREAMS_BLOCKED frames", func() {
err := conn.handleFrame(&wire.StreamsBlockedFrame{}, protocol.Encryption1RTT, protocol.ConnectionID{})
Expect(err).NotTo(HaveOccurred())
})
It("handles CONNECTION_CLOSE frames, with a transport error code", func() {
expectedErr := &qerr.TransportError{
Remote: true,
ErrorCode: qerr.StreamLimitError,
ErrorMessage: "foobar",
}
streamManager.EXPECT().CloseWithError(expectedErr)
connRunner.EXPECT().ReplaceWithClosed(gomock.Any(), gomock.Any(), gomock.Any()).Do(func(connIDs []protocol.ConnectionID, _ protocol.Perspective, _ []byte) {
Expect(connIDs).To(ConsistOf(clientDestConnID, srcConnID))
})
cryptoSetup.EXPECT().Close()
gomock.InOrder(
tracer.EXPECT().ClosedConnection(expectedErr),
tracer.EXPECT().Close(),
)
go func() {
defer GinkgoRecover()
cryptoSetup.EXPECT().StartHandshake().MaxTimes(1)
cryptoSetup.EXPECT().NextEvent().Return(handshake.Event{Kind: handshake.EventNoEvent})
Expect(conn.run()).To(MatchError(expectedErr))
}()
Expect(conn.handleFrame(&wire.ConnectionCloseFrame{
ErrorCode: uint64(qerr.StreamLimitError),
ReasonPhrase: "foobar",
}, protocol.Encryption1RTT, protocol.ConnectionID{})).To(Succeed())
Eventually(conn.Context().Done()).Should(BeClosed())
})
It("handles CONNECTION_CLOSE frames, with an application error code", func() {
testErr := &qerr.ApplicationError{
Remote: true,
ErrorCode: 0x1337,
ErrorMessage: "foobar",
}
streamManager.EXPECT().CloseWithError(testErr)
connRunner.EXPECT().ReplaceWithClosed(gomock.Any(), gomock.Any(), gomock.Any()).Do(func(connIDs []protocol.ConnectionID, _ protocol.Perspective, _ []byte) {
Expect(connIDs).To(ConsistOf(clientDestConnID, srcConnID))
})
cryptoSetup.EXPECT().Close()
gomock.InOrder(
tracer.EXPECT().ClosedConnection(testErr),
tracer.EXPECT().Close(),
)
go func() {
defer GinkgoRecover()
cryptoSetup.EXPECT().StartHandshake().MaxTimes(1)
cryptoSetup.EXPECT().NextEvent().Return(handshake.Event{Kind: handshake.EventNoEvent})
Expect(conn.run()).To(MatchError(testErr))
}()
ccf := &wire.ConnectionCloseFrame{
ErrorCode: 0x1337,
ReasonPhrase: "foobar",
IsApplicationError: true,
}
Expect(conn.handleFrame(ccf, protocol.Encryption1RTT, protocol.ConnectionID{})).To(Succeed())
Eventually(conn.Context().Done()).Should(BeClosed())
Expect(context.Cause(conn.Context())).To(MatchError(testErr))
})
It("errors on HANDSHAKE_DONE frames", func() {
Expect(conn.handleHandshakeDoneFrame()).To(MatchError(&qerr.TransportError{
ErrorCode: qerr.ProtocolViolation,
ErrorMessage: "received a HANDSHAKE_DONE frame",
}))
})
})
It("tells its versions", func() {
conn.version = 4242
Expect(conn.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())
}
})
runConn := func() {
go func() {
defer GinkgoRecover()
cryptoSetup.EXPECT().StartHandshake().MaxTimes(1)
cryptoSetup.EXPECT().NextEvent().Return(handshake.Event{Kind: handshake.EventNoEvent})
runErr <- conn.run()
}()
Eventually(areConnsRunning).Should(BeTrue())
}
It("shuts down without error", func() {
conn.handshakeComplete = true
runConn()
streamManager.EXPECT().CloseWithError(&qerr.ApplicationError{})
expectReplaceWithClosed()
cryptoSetup.EXPECT().Close()
buffer := getPacketBuffer()
buffer.Data = append(buffer.Data, []byte("connection close")...)
packer.EXPECT().PackApplicationClose(gomock.Any(), gomock.Any(), conn.version).DoAndReturn(func(e *qerr.ApplicationError, _ protocol.ByteCount, _ protocol.VersionNumber) (*coalescedPacket, error) {
Expect(e.ErrorCode).To(BeEquivalentTo(qerr.NoError))
Expect(e.ErrorMessage).To(BeEmpty())
return &coalescedPacket{buffer: buffer}, nil
})
mconn.EXPECT().Write([]byte("connection close"), gomock.Any(), gomock.Any())
gomock.InOrder(
tracer.EXPECT().ClosedConnection(gomock.Any()).Do(func(e error) {
var appErr *ApplicationError
Expect(errors.As(e, &appErr)).To(BeTrue())
Expect(appErr.Remote).To(BeFalse())
Expect(appErr.ErrorCode).To(BeZero())
}),
tracer.EXPECT().Close(),
)
conn.shutdown()
Eventually(areConnsRunning).Should(BeFalse())
Expect(conn.Context().Done()).To(BeClosed())
})
It("only closes once", func() {
runConn()
streamManager.EXPECT().CloseWithError(gomock.Any())
expectReplaceWithClosed()
cryptoSetup.EXPECT().Close()
packer.EXPECT().PackApplicationClose(gomock.Any(), gomock.Any(), conn.version).Return(&coalescedPacket{buffer: getPacketBuffer()}, nil)
mconn.EXPECT().Write(gomock.Any(), gomock.Any(), gomock.Any())
tracer.EXPECT().ClosedConnection(gomock.Any())
tracer.EXPECT().Close()
conn.shutdown()
conn.shutdown()
Eventually(areConnsRunning).Should(BeFalse())
Expect(conn.Context().Done()).To(BeClosed())
})
It("closes with an error", func() {
runConn()
expectedErr := &qerr.ApplicationError{
ErrorCode: 0x1337,
ErrorMessage: "test error",
}
streamManager.EXPECT().CloseWithError(expectedErr)
expectReplaceWithClosed()
cryptoSetup.EXPECT().Close()
packer.EXPECT().PackApplicationClose(expectedErr, gomock.Any(), conn.version).Return(&coalescedPacket{buffer: getPacketBuffer()}, nil)
mconn.EXPECT().Write(gomock.Any(), gomock.Any(), gomock.Any())
gomock.InOrder(
tracer.EXPECT().ClosedConnection(expectedErr),
tracer.EXPECT().Close(),
)
conn.CloseWithError(0x1337, "test error")
Eventually(areConnsRunning).Should(BeFalse())
Expect(conn.Context().Done()).To(BeClosed())
Expect(context.Cause(conn.Context())).To(MatchError(expectedErr))
})
It("includes the frame type in transport-level close frames", func() {
runConn()
expectedErr := &qerr.TransportError{
ErrorCode: 0x1337,
FrameType: 0x42,
ErrorMessage: "test error",
}
streamManager.EXPECT().CloseWithError(expectedErr)
expectReplaceWithClosed()
cryptoSetup.EXPECT().Close()
packer.EXPECT().PackConnectionClose(expectedErr, gomock.Any(), conn.version).Return(&coalescedPacket{buffer: getPacketBuffer()}, nil)
mconn.EXPECT().Write(gomock.Any(), gomock.Any(), gomock.Any())
gomock.InOrder(
tracer.EXPECT().ClosedConnection(expectedErr),
tracer.EXPECT().Close(),
)
conn.closeLocal(expectedErr)
Eventually(areConnsRunning).Should(BeFalse())
Expect(conn.Context().Done()).To(BeClosed())
})
It("destroys the connection", func() {
runConn()
testErr := errors.New("close")
streamManager.EXPECT().CloseWithError(gomock.Any())
connRunner.EXPECT().Remove(gomock.Any()).AnyTimes()
cryptoSetup.EXPECT().Close()
// don't EXPECT any calls to mconn.Write()
gomock.InOrder(
tracer.EXPECT().ClosedConnection(gomock.Any()).Do(func(e error) {
var transportErr *TransportError
Expect(errors.As(e, &transportErr)).To(BeTrue())
Expect(transportErr.Remote).To(BeFalse())
Expect(transportErr.ErrorCode).To(Equal(qerr.InternalError))
}),
tracer.EXPECT().Close(),
)
conn.destroy(testErr)
Eventually(areConnsRunning).Should(BeFalse())
expectedRunErr = &qerr.TransportError{
ErrorCode: qerr.InternalError,
ErrorMessage: testErr.Error(),
}
})
It("cancels the context when the run loop exists", func() {
runConn()
streamManager.EXPECT().CloseWithError(gomock.Any())
expectReplaceWithClosed()
cryptoSetup.EXPECT().Close()
packer.EXPECT().PackApplicationClose(gomock.Any(), gomock.Any(), conn.version).Return(&coalescedPacket{buffer: getPacketBuffer()}, nil)
returned := make(chan struct{})
go func() {
defer GinkgoRecover()
ctx := conn.Context()
<-ctx.Done()
Expect(ctx.Err()).To(MatchError(context.Canceled))
close(returned)
}()
Consistently(returned).ShouldNot(BeClosed())
mconn.EXPECT().Write(gomock.Any(), gomock.Any(), gomock.Any())
tracer.EXPECT().ClosedConnection(gomock.Any())
tracer.EXPECT().Close()
conn.shutdown()
Eventually(returned).Should(BeClosed())
Expect(context.Cause(conn.Context())).To(MatchError(context.Canceled))
})
It("doesn't send any more packets after receiving a CONNECTION_CLOSE", func() {
unpacker := NewMockUnpacker(mockCtrl)
conn.handshakeConfirmed = true
conn.unpacker = unpacker
runConn()
cryptoSetup.EXPECT().Close()
streamManager.EXPECT().CloseWithError(gomock.Any())
connRunner.EXPECT().ReplaceWithClosed(gomock.Any(), gomock.Any(), gomock.Any()).AnyTimes()
b, err := wire.AppendShortHeader(nil, srcConnID, 42, protocol.PacketNumberLen2, protocol.KeyPhaseOne)
Expect(err).ToNot(HaveOccurred())
unpacker.EXPECT().UnpackShortHeader(gomock.Any(), gomock.Any()).DoAndReturn(func(time.Time, []byte) (protocol.PacketNumber, protocol.PacketNumberLen, protocol.KeyPhaseBit, []byte, error) {
b, err := (&wire.ConnectionCloseFrame{ErrorCode: uint64(qerr.StreamLimitError)}).Append(nil, conn.version)
Expect(err).ToNot(HaveOccurred())
return 3, protocol.PacketNumberLen2, protocol.KeyPhaseOne, b, nil
})
gomock.InOrder(
tracer.EXPECT().ReceivedShortHeaderPacket(gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any()),
tracer.EXPECT().ClosedConnection(gomock.Any()),
tracer.EXPECT().Close(),
)
// don't EXPECT any calls to packer.PackPacket()
conn.handlePacket(receivedPacket{
rcvTime: time.Now(),
remoteAddr: &net.UDPAddr{},
buffer: getPacketBuffer(),
data: b,
})
// Consistently(pack).ShouldNot(Receive())
Eventually(conn.Context().Done()).Should(BeClosed())
})
It("closes when the sendQueue encounters an error", func() {
conn.handshakeConfirmed = true
sconn := NewMockSendConn(mockCtrl)
sconn.EXPECT().capabilities().AnyTimes()
sconn.EXPECT().Write(gomock.Any(), gomock.Any(), gomock.Any()).Return(io.ErrClosedPipe).AnyTimes()
conn.sendQueue = newSendQueue(sconn)
sph := mockackhandler.NewMockSentPacketHandler(mockCtrl)
sph.EXPECT().GetLossDetectionTimeout().Return(time.Now().Add(time.Hour)).AnyTimes()
sph.EXPECT().ECNMode(true).Return(protocol.ECT1).AnyTimes()
sph.EXPECT().SendMode(gomock.Any()).Return(ackhandler.SendAny).AnyTimes()
// only expect a single SentPacket() call
sph.EXPECT().SentPacket(gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any())
tracer.EXPECT().SentShortHeaderPacket(gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any())
tracer.EXPECT().ClosedConnection(gomock.Any())
tracer.EXPECT().Close()
streamManager.EXPECT().CloseWithError(gomock.Any())
connRunner.EXPECT().Remove(gomock.Any()).AnyTimes()
cryptoSetup.EXPECT().Close()
conn.sentPacketHandler = sph
expectAppendPacket(packer, shortHeaderPacket{PacketNumber: 1}, []byte("foobar"))
packer.EXPECT().AppendPacket(gomock.Any(), gomock.Any(), conn.version).Return(shortHeaderPacket{}, errNothingToPack).AnyTimes()
runConn()
conn.queueControlFrame(&wire.PingFrame{})
conn.scheduleSending()
Eventually(conn.Context().Done()).Should(BeClosed())
})
It("closes due to a stateless reset", func() {
token := protocol.StatelessResetToken{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}
runConn()
gomock.InOrder(
tracer.EXPECT().ClosedConnection(gomock.Any()).Do(func(e error) {
var srErr *StatelessResetError
Expect(errors.As(e, &srErr)).To(BeTrue())
Expect(srErr.Token).To(Equal(token))
}),
tracer.EXPECT().Close(),
)
streamManager.EXPECT().CloseWithError(gomock.Any())
connRunner.EXPECT().Remove(gomock.Any()).AnyTimes()
cryptoSetup.EXPECT().Close()
conn.destroy(&StatelessResetError{Token: token})
})
})
Context("receiving packets", func() {
var unpacker *MockUnpacker
BeforeEach(func() {
unpacker = NewMockUnpacker(mockCtrl)
conn.unpacker = unpacker
})
getShortHeaderPacket := func(connID protocol.ConnectionID, pn protocol.PacketNumber, data []byte) receivedPacket {
b, err := wire.AppendShortHeader(nil, connID, pn, protocol.PacketNumberLen2, protocol.KeyPhaseOne)
Expect(err).ToNot(HaveOccurred())
return receivedPacket{
data: append(b, data...),
buffer: getPacketBuffer(),
rcvTime: time.Now(),
}
}
getLongHeaderPacket := func(extHdr *wire.ExtendedHeader, data []byte) receivedPacket {
b, err := extHdr.Append(nil, conn.version)
Expect(err).ToNot(HaveOccurred())
return receivedPacket{
data: append(b, data...),
buffer: getPacketBuffer(),
rcvTime: time.Now(),
}
}
It("drops Retry packets", func() {
p := getLongHeaderPacket(&wire.ExtendedHeader{Header: wire.Header{
Type: protocol.PacketTypeRetry,
DestConnectionID: destConnID,
SrcConnectionID: srcConnID,
Version: conn.version,
Token: []byte("foobar"),
}}, make([]byte, 16) /* Retry integrity tag */)
tracer.EXPECT().DroppedPacket(logging.PacketTypeRetry, protocol.InvalidPacketNumber, p.Size(), logging.PacketDropUnexpectedPacket)
Expect(conn.handlePacketImpl(p)).To(BeFalse())
})
It("drops Version Negotiation packets", func() {
b := wire.ComposeVersionNegotiation(
protocol.ArbitraryLenConnectionID(srcConnID.Bytes()),
protocol.ArbitraryLenConnectionID(destConnID.Bytes()),
conn.config.Versions,
)
tracer.EXPECT().DroppedPacket(logging.PacketTypeVersionNegotiation, protocol.InvalidPacketNumber, protocol.ByteCount(len(b)), logging.PacketDropUnexpectedPacket)
Expect(conn.handlePacketImpl(receivedPacket{
data: b,
buffer: getPacketBuffer(),
})).To(BeFalse())
})
It("drops packets for which header decryption fails", func() {
p := getLongHeaderPacket(&wire.ExtendedHeader{
Header: wire.Header{
Type: protocol.PacketTypeHandshake,
Version: conn.version,
},
PacketNumberLen: protocol.PacketNumberLen2,
}, nil)
p.data[0] ^= 0x40 // unset the QUIC bit
tracer.EXPECT().DroppedPacket(logging.PacketTypeNotDetermined, protocol.InvalidPacketNumber, p.Size(), logging.PacketDropHeaderParseError)
Expect(conn.handlePacketImpl(p)).To(BeFalse())
})
It("drops packets for which the version is unsupported", func() {
p := getLongHeaderPacket(&wire.ExtendedHeader{
Header: wire.Header{
Type: protocol.PacketTypeHandshake,
Version: conn.version + 1,
},
PacketNumberLen: protocol.PacketNumberLen2,
}, nil)
tracer.EXPECT().DroppedPacket(logging.PacketTypeNotDetermined, protocol.InvalidPacketNumber, p.Size(), logging.PacketDropUnsupportedVersion)
Expect(conn.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, conn.version+1)
p := getLongHeaderPacket(&wire.ExtendedHeader{
Header: wire.Header{
Type: protocol.PacketTypeHandshake,
DestConnectionID: destConnID,
SrcConnectionID: srcConnID,
Version: conn.version + 1,
},
PacketNumberLen: protocol.PacketNumberLen2,
}, nil)
tracer.EXPECT().DroppedPacket(logging.PacketTypeHandshake, protocol.InvalidPacketNumber, p.Size(), logging.PacketDropUnexpectedVersion)
Expect(conn.handlePacketImpl(p)).To(BeFalse())
})
It("informs the ReceivedPacketHandler about non-ack-eliciting packets", func() {
hdr := &wire.ExtendedHeader{
Header: wire.Header{
Type: protocol.PacketTypeInitial,
DestConnectionID: srcConnID,
Version: protocol.Version1,
Length: 1,
},
PacketNumber: 0x37,
PacketNumberLen: protocol.PacketNumberLen1,
}
unpackedHdr := *hdr
unpackedHdr.PacketNumber = 0x1337
packet := getLongHeaderPacket(hdr, nil)
packet.ecn = protocol.ECNCE
rcvTime := time.Now().Add(-10 * time.Second)
unpacker.EXPECT().UnpackLongHeader(gomock.Any(), rcvTime, gomock.Any(), conn.version).Return(&unpackedPacket{
encryptionLevel: protocol.EncryptionInitial,
hdr: &unpackedHdr,
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.ECNCE, protocol.EncryptionInitial, rcvTime, false),
)
conn.receivedPacketHandler = rph
packet.rcvTime = rcvTime
tracer.EXPECT().StartedConnection(gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any())
tracer.EXPECT().ReceivedLongHeaderPacket(gomock.Any(), gomock.Any(), logging.ECNCE, []logging.Frame{})
Expect(conn.handlePacketImpl(packet)).To(BeTrue())
})
It("informs the ReceivedPacketHandler about ack-eliciting packets", func() {
rcvTime := time.Now().Add(-10 * time.Second)
b, err := (&wire.PingFrame{}).Append(nil, conn.version)
Expect(err).ToNot(HaveOccurred())
packet := getShortHeaderPacket(srcConnID, 0x37, nil)
packet.ecn = protocol.ECT1
unpacker.EXPECT().UnpackShortHeader(rcvTime, gomock.Any()).Return(protocol.PacketNumber(0x1337), protocol.PacketNumberLen2, protocol.KeyPhaseZero, b, nil)
rph := mockackhandler.NewMockReceivedPacketHandler(mockCtrl)
gomock.InOrder(
rph.EXPECT().IsPotentiallyDuplicate(protocol.PacketNumber(0x1337), protocol.Encryption1RTT),
rph.EXPECT().ReceivedPacket(protocol.PacketNumber(0x1337), protocol.ECT1, protocol.Encryption1RTT, rcvTime, true),
)
conn.receivedPacketHandler = rph
packet.rcvTime = rcvTime
tracer.EXPECT().ReceivedShortHeaderPacket(
&logging.ShortHeader{PacketNumber: 0x1337, PacketNumberLen: 2, KeyPhase: protocol.KeyPhaseZero},
protocol.ByteCount(len(packet.data)),
logging.ECT1,
[]logging.Frame{&logging.PingFrame{}},
)
Expect(conn.handlePacketImpl(packet)).To(BeTrue())
})
It("drops duplicate packets", func() {
packet := getShortHeaderPacket(srcConnID, 0x37, nil)
unpacker.EXPECT().UnpackShortHeader(gomock.Any(), gomock.Any()).Return(protocol.PacketNumber(0x1337), protocol.PacketNumberLen2, protocol.KeyPhaseOne, []byte("foobar"), nil)
rph := mockackhandler.NewMockReceivedPacketHandler(mockCtrl)
rph.EXPECT().IsPotentiallyDuplicate(protocol.PacketNumber(0x1337), protocol.Encryption1RTT).Return(true)
conn.receivedPacketHandler = rph
tracer.EXPECT().DroppedPacket(logging.PacketType1RTT, protocol.PacketNumber(0x1337), protocol.ByteCount(len(packet.data)), logging.PacketDropDuplicate)
Expect(conn.handlePacketImpl(packet)).To(BeFalse())
})
It("drops a packet when unpacking fails", func() {
unpacker.EXPECT().UnpackLongHeader(gomock.Any(), gomock.Any(), gomock.Any(), conn.version).Return(nil, handshake.ErrDecryptionFailed)
streamManager.EXPECT().CloseWithError(gomock.Any())
cryptoSetup.EXPECT().Close()
packer.EXPECT().PackConnectionClose(gomock.Any(), gomock.Any(), conn.version).Return(&coalescedPacket{buffer: getPacketBuffer()}, nil)
go func() {
defer GinkgoRecover()
cryptoSetup.EXPECT().StartHandshake().MaxTimes(1)
cryptoSetup.EXPECT().NextEvent().Return(handshake.Event{Kind: handshake.EventNoEvent})
conn.run()
}()
expectReplaceWithClosed()
p := getLongHeaderPacket(&wire.ExtendedHeader{
Header: wire.Header{
Type: protocol.PacketTypeHandshake,
DestConnectionID: srcConnID,
Version: conn.version,
Length: 2 + 6,
},
PacketNumber: 0x1337,
PacketNumberLen: protocol.PacketNumberLen2,
}, []byte("foobar"))
tracer.EXPECT().DroppedPacket(logging.PacketTypeHandshake, protocol.InvalidPacketNumber, p.Size(), logging.PacketDropPayloadDecryptError)
conn.handlePacket(p)
Consistently(conn.Context().Done()).ShouldNot(BeClosed())
// make the go routine return
tracer.EXPECT().ClosedConnection(gomock.Any())
tracer.EXPECT().Close()
mconn.EXPECT().Write(gomock.Any(), gomock.Any(), gomock.Any())
conn.closeLocal(errors.New("close"))
Eventually(conn.Context().Done()).Should(BeClosed())
})
It("processes multiple received packets before sending one", func() {
conn.creationTime = time.Now()
var pn protocol.PacketNumber
unpacker.EXPECT().UnpackShortHeader(gomock.Any(), gomock.Any()).DoAndReturn(func(rcvTime time.Time, data []byte) (protocol.PacketNumber, protocol.PacketNumberLen, protocol.KeyPhaseBit, []byte, error) {
pn++
return pn, protocol.PacketNumberLen2, protocol.KeyPhaseZero, []byte{0} /* PADDING frame */, nil
}).Times(3)
tracer.EXPECT().ReceivedShortHeaderPacket(gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any()).Times(3)
packer.EXPECT().PackCoalescedPacket(false, gomock.Any(), conn.version) // only expect a single call
for i := 0; i < 3; i++ {
conn.handlePacket(getShortHeaderPacket(srcConnID, 0x1337+protocol.PacketNumber(i), []byte("foobar")))
}
go func() {
defer GinkgoRecover()
cryptoSetup.EXPECT().StartHandshake().MaxTimes(1)
cryptoSetup.EXPECT().NextEvent().Return(handshake.Event{Kind: handshake.EventNoEvent})
conn.run()
}()
Consistently(conn.Context().Done()).ShouldNot(BeClosed())
// make the go routine return
streamManager.EXPECT().CloseWithError(gomock.Any())
cryptoSetup.EXPECT().Close()
packer.EXPECT().PackConnectionClose(gomock.Any(), gomock.Any(), conn.version).Return(&coalescedPacket{buffer: getPacketBuffer()}, nil)
expectReplaceWithClosed()
tracer.EXPECT().ClosedConnection(gomock.Any())
tracer.EXPECT().Close()
mconn.EXPECT().Write(gomock.Any(), gomock.Any(), gomock.Any())
conn.closeLocal(errors.New("close"))
Eventually(conn.Context().Done()).Should(BeClosed())
})
It("doesn't processes multiple received packets before sending one before handshake completion", func() {
conn.handshakeComplete = false
conn.creationTime = time.Now()
var pn protocol.PacketNumber
unpacker.EXPECT().UnpackShortHeader(gomock.Any(), gomock.Any()).DoAndReturn(func(rcvTime time.Time, data []byte) (protocol.PacketNumber, protocol.PacketNumberLen, protocol.KeyPhaseBit, []byte, error) {
pn++
return pn, protocol.PacketNumberLen4, protocol.KeyPhaseZero, []byte{0} /* PADDING frame */, nil
}).Times(3)
tracer.EXPECT().ReceivedShortHeaderPacket(gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any()).Times(3)
packer.EXPECT().PackCoalescedPacket(false, gomock.Any(), conn.version).Times(3)
for i := 0; i < 3; i++ {
conn.handlePacket(getShortHeaderPacket(srcConnID, 0x1337+protocol.PacketNumber(i), []byte("foobar")))
}
go func() {
defer GinkgoRecover()
cryptoSetup.EXPECT().StartHandshake().MaxTimes(1)
cryptoSetup.EXPECT().NextEvent().Return(handshake.Event{Kind: handshake.EventNoEvent})
conn.run()
}()
Consistently(conn.Context().Done()).ShouldNot(BeClosed())
// make the go routine return
streamManager.EXPECT().CloseWithError(gomock.Any())
cryptoSetup.EXPECT().Close()
packer.EXPECT().PackConnectionClose(gomock.Any(), gomock.Any(), conn.version).Return(&coalescedPacket{buffer: getPacketBuffer()}, nil)
expectReplaceWithClosed()
tracer.EXPECT().ClosedConnection(gomock.Any())
tracer.EXPECT().Close()
mconn.EXPECT().Write(gomock.Any(), gomock.Any(), gomock.Any())
conn.closeLocal(errors.New("close"))
Eventually(conn.Context().Done()).Should(BeClosed())
})
It("closes the connection when unpacking fails because the reserved bits were incorrect", func() {
unpacker.EXPECT().UnpackShortHeader(gomock.Any(), gomock.Any()).Return(protocol.PacketNumber(0), protocol.PacketNumberLen(0), protocol.KeyPhaseBit(0), nil, wire.ErrInvalidReservedBits)
streamManager.EXPECT().CloseWithError(gomock.Any())
cryptoSetup.EXPECT().Close()
packer.EXPECT().PackConnectionClose(gomock.Any(), gomock.Any(), conn.version).Return(&coalescedPacket{buffer: getPacketBuffer()}, nil)
done := make(chan struct{})
go func() {
defer GinkgoRecover()
cryptoSetup.EXPECT().StartHandshake().MaxTimes(1)
cryptoSetup.EXPECT().NextEvent().Return(handshake.Event{Kind: handshake.EventNoEvent})
err := conn.run()
Expect(err).To(HaveOccurred())
Expect(err).To(BeAssignableToTypeOf(&qerr.TransportError{}))
Expect(err.(*qerr.TransportError).ErrorCode).To(Equal(qerr.ProtocolViolation))
close(done)
}()
expectReplaceWithClosed()
mconn.EXPECT().Write(gomock.Any(), gomock.Any(), gomock.Any())
packet := getShortHeaderPacket(srcConnID, 0x42, nil)
tracer.EXPECT().ClosedConnection(gomock.Any())
tracer.EXPECT().Close()
conn.handlePacket(packet)
Eventually(conn.Context().Done()).Should(BeClosed())
})
It("ignores packets when unpacking the header fails", func() {
testErr := &headerParseError{errors.New("test error")}
unpacker.EXPECT().UnpackShortHeader(gomock.Any(), gomock.Any()).Return(protocol.PacketNumber(0), protocol.PacketNumberLen(0), protocol.KeyPhaseBit(0), nil, testErr)
streamManager.EXPECT().CloseWithError(gomock.Any())
cryptoSetup.EXPECT().Close()
runErr := make(chan error)
go func() {
defer GinkgoRecover()
cryptoSetup.EXPECT().StartHandshake().MaxTimes(1)
cryptoSetup.EXPECT().NextEvent().Return(handshake.Event{Kind: handshake.EventNoEvent})
runErr <- conn.run()
}()
expectReplaceWithClosed()
tracer.EXPECT().DroppedPacket(logging.PacketType1RTT, protocol.InvalidPacketNumber, gomock.Any(), logging.PacketDropHeaderParseError)
conn.handlePacket(getShortHeaderPacket(srcConnID, 0x42, nil))
Consistently(runErr).ShouldNot(Receive())
// make the go routine return
packer.EXPECT().PackApplicationClose(gomock.Any(), gomock.Any(), conn.version).Return(&coalescedPacket{buffer: getPacketBuffer()}, nil)
tracer.EXPECT().ClosedConnection(gomock.Any())
tracer.EXPECT().Close()
mconn.EXPECT().Write(gomock.Any(), gomock.Any(), gomock.Any())
conn.shutdown()
Eventually(conn.Context().Done()).Should(BeClosed())
})
It("closes the connection when unpacking fails because of an error other than a decryption error", func() {
unpacker.EXPECT().UnpackShortHeader(gomock.Any(), gomock.Any()).Return(protocol.PacketNumber(0), protocol.PacketNumberLen(0), protocol.KeyPhaseBit(0), nil, &qerr.TransportError{ErrorCode: qerr.ConnectionIDLimitError})
streamManager.EXPECT().CloseWithError(gomock.Any())
cryptoSetup.EXPECT().Close()
packer.EXPECT().PackConnectionClose(gomock.Any(), gomock.Any(), conn.version).Return(&coalescedPacket{buffer: getPacketBuffer()}, nil)
done := make(chan struct{})
go func() {
defer GinkgoRecover()
cryptoSetup.EXPECT().StartHandshake().MaxTimes(1)
cryptoSetup.EXPECT().NextEvent().Return(handshake.Event{Kind: handshake.EventNoEvent})
err := conn.run()
Expect(err).To(HaveOccurred())
Expect(err).To(BeAssignableToTypeOf(&qerr.TransportError{}))
Expect(err.(*qerr.TransportError).ErrorCode).To(Equal(qerr.ConnectionIDLimitError))
close(done)
}()
expectReplaceWithClosed()
mconn.EXPECT().Write(gomock.Any(), gomock.Any(), gomock.Any())
tracer.EXPECT().ClosedConnection(gomock.Any())
tracer.EXPECT().Close()
conn.handlePacket(getShortHeaderPacket(srcConnID, 0x42, nil))
Eventually(conn.Context().Done()).Should(BeClosed())
})
It("ignores packets with a different source connection ID", func() {
hdr1 := &wire.ExtendedHeader{
Header: wire.Header{
Type: protocol.PacketTypeInitial,
DestConnectionID: destConnID,