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allow 0-RTT when the server's connection receive limit is increased

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This commit is contained in:
Marten Seemann 2021-03-17 18:45:56 +08:00
parent 6c3876d6b3
commit 31ac5ca60d
4 changed files with 81 additions and 68 deletions
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134
integrationtests/self/zero_rtt_test.go
View file

@ -19,6 +19,7 @@ import (
"github.com/lucas-clemente/quic-go/logging"
. "github.com/onsi/ginkgo"
. "github.com/onsi/ginkgo/extensions/table"
. "github.com/onsi/gomega"
)
@ -550,77 +551,84 @@ var _ = Describe("0-RTT", func() {
Expect(get0RTTPackets(tracer.getRcvdPackets())).To(BeEmpty())
})
It("doesn't reject 0-RTT when the server's transport stream flow control limit increased", func() {
tlsConf, clientConf := dialAndReceiveSessionTicket(getQuicConfig(&quic.Config{
InitialStreamReceiveWindow: 3,
AcceptToken: func(_ net.Addr, _ *quic.Token) bool { return true },
}))
DescribeTable("flow control limits",
func(addFlowControlLimit func(*quic.Config, uint64)) {
tracer := newRcvdPacketTracer()
firstConf := getQuicConfig(&quic.Config{
AcceptToken: func(_ net.Addr, _ *quic.Token) bool { return true },
Versions: []protocol.VersionNumber{version},
})
addFlowControlLimit(firstConf, 3)
tlsConf, clientConf := dialAndReceiveSessionTicket(firstConf)
tracer := newRcvdPacketTracer()
ln, err := quic.ListenAddrEarly(
"localhost:0",
tlsConf,
getQuicConfig(&quic.Config{
Versions: []protocol.VersionNumber{version},
AcceptToken: func(_ net.Addr, _ *quic.Token) bool { return true },
InitialStreamReceiveWindow: 100,
Tracer: newTracer(func() logging.ConnectionTracer { return tracer }),
}),
)
Expect(err).ToNot(HaveOccurred())
defer ln.Close()
proxy, _ := runCountingProxy(ln.Addr().(*net.UDPAddr).Port)
defer proxy.Close()
sess, err := quic.DialAddrEarly(
fmt.Sprintf("localhost:%d", proxy.LocalPort()),
clientConf,
getQuicConfig(&quic.Config{Versions: []protocol.VersionNumber{version}}),
)
Expect(err).ToNot(HaveOccurred())
str, err := sess.OpenUniStream()
Expect(err).ToNot(HaveOccurred())
written := make(chan struct{})
go func() {
defer GinkgoRecover()
defer close(written)
_, err := str.Write([]byte("foobar"))
secondConf := getQuicConfig(&quic.Config{
Versions: []protocol.VersionNumber{version},
AcceptToken: func(_ net.Addr, _ *quic.Token) bool { return true },
Tracer: newTracer(func() logging.ConnectionTracer { return tracer }),
})
addFlowControlLimit(secondConf, 100)
ln, err := quic.ListenAddrEarly(
"localhost:0",
tlsConf,
secondConf,
)
Expect(err).ToNot(HaveOccurred())
Expect(str.Close()).To(Succeed())
}()
defer ln.Close()
proxy, _ := runCountingProxy(ln.Addr().(*net.UDPAddr).Port)
defer proxy.Close()
Eventually(written).Should(BeClosed())
sess, err := quic.DialAddrEarly(
fmt.Sprintf("localhost:%d", proxy.LocalPort()),
clientConf,
getQuicConfig(&quic.Config{Versions: []protocol.VersionNumber{version}}),
)
Expect(err).ToNot(HaveOccurred())
str, err := sess.OpenUniStream()
Expect(err).ToNot(HaveOccurred())
written := make(chan struct{})
go func() {
defer GinkgoRecover()
defer close(written)
_, err := str.Write([]byte("foobar"))
Expect(err).ToNot(HaveOccurred())
Expect(str.Close()).To(Succeed())
}()
serverSess, err := ln.Accept(context.Background())
Expect(err).ToNot(HaveOccurred())
rstr, err := serverSess.AcceptUniStream(context.Background())
Expect(err).ToNot(HaveOccurred())
data, err := ioutil.ReadAll(rstr)
Expect(err).ToNot(HaveOccurred())
Expect(data).To(Equal([]byte("foobar")))
Expect(serverSess.ConnectionState().TLS.Used0RTT).To(BeTrue())
Expect(serverSess.CloseWithError(0, "")).To(Succeed())
Eventually(sess.Context().Done()).Should(BeClosed())
Eventually(written).Should(BeClosed())
var processedFirst bool
for _, p := range tracer.getRcvdPackets() {
for _, f := range p.frames {
if sf, ok := f.(*logging.StreamFrame); ok {
if !processedFirst {
// The first STREAM should have been sent in a 0-RTT packet.
// Due to the flow control limit, the STREAM frame was limit to the first 3 bytes.
Expect(p.hdr.Type).To(Equal(protocol.PacketType0RTT))
Expect(sf.Length).To(BeEquivalentTo(3))
processedFirst = true
} else {
// All other STREAM frames can only be sent after handshake completion.
Expect(p.hdr.IsLongHeader).To(BeFalse())
Expect(sf.Offset).ToNot(BeZero())
serverSess, err := ln.Accept(context.Background())
Expect(err).ToNot(HaveOccurred())
rstr, err := serverSess.AcceptUniStream(context.Background())
Expect(err).ToNot(HaveOccurred())
data, err := ioutil.ReadAll(rstr)
Expect(err).ToNot(HaveOccurred())
Expect(data).To(Equal([]byte("foobar")))
Expect(serverSess.ConnectionState().TLS.Used0RTT).To(BeTrue())
Expect(serverSess.CloseWithError(0, "")).To(Succeed())
Eventually(sess.Context().Done()).Should(BeClosed())
var processedFirst bool
for _, p := range tracer.getRcvdPackets() {
for _, f := range p.frames {
if sf, ok := f.(*logging.StreamFrame); ok {
if !processedFirst {
// The first STREAM should have been sent in a 0-RTT packet.
// Due to the flow control limit, the STREAM frame was limit to the first 3 bytes.
Expect(p.hdr.Type).To(Equal(protocol.PacketType0RTT))
Expect(sf.Length).To(BeEquivalentTo(3))
processedFirst = true
} else {
// All other STREAM frames can only be sent after handshake completion.
Expect(p.hdr.IsLongHeader).To(BeFalse())
Expect(sf.Offset).ToNot(BeZero())
}
}
}
}
}
})
},
Entry("doesn't reject 0-RTT when the server's transport stream flow control limit increased", func(c *quic.Config, limit uint64) { c.InitialStreamReceiveWindow = limit }),
Entry("doesn't reject 0-RTT when the server's transport connection flow control limit increased", func(c *quic.Config, limit uint64) { c.InitialConnectionReceiveWindow = limit }),
)
It("correctly deals with 0-RTT rejections", func() {
tlsConf, clientConf := dialAndReceiveSessionTicket(nil)

4
internal/handshake/crypto_setup_test.go
View file

@ -776,7 +776,7 @@ var _ = Describe("Crypto Setup TLS", func() {
Expect(client.ConnectionState().Used0RTT).To(BeTrue())
})
It("rejects 0-RTT, whent the transport parameters changed", func() {
It("rejects 0-RTT, when the transport parameters changed", func() {
csc := mocktls.NewMockClientSessionCache(mockCtrl)
var state *tls.ClientSessionState
receivedSessionTicket := make(chan struct{})
@ -810,7 +810,7 @@ var _ = Describe("Crypto Setup TLS", func() {
clientHelloWrittenChan, client, clientErr, server, serverErr = handshakeWithTLSConf(
clientConf, serverConf,
clientRTTStats, &utils.RTTStats{},
&wire.TransportParameters{}, &wire.TransportParameters{InitialMaxData: initialMaxData + 1},
&wire.TransportParameters{}, &wire.TransportParameters{InitialMaxData: initialMaxData - 1},
true,
)
Expect(clientErr).ToNot(HaveOccurred())

9
internal/wire/transport_parameter_test.go
View file

@ -528,11 +528,16 @@ var _ = Describe("Transport Parameters", func() {
Expect(p.ValidFor0RTT(saved)).To(BeTrue())
})
It("rejects the parameters if the InitialMaxData changed", func() {
p.InitialMaxData = 0
It("rejects the parameters if the InitialMaxData was reduced", func() {
p.InitialMaxData = saved.InitialMaxData - 1
Expect(p.ValidFor0RTT(saved)).To(BeFalse())
})
It("doesn't reject the parameters if the InitialMaxData was increased", func() {
p.InitialMaxData = saved.InitialMaxData + 1
Expect(p.ValidFor0RTT(saved)).To(BeTrue())
})
It("rejects the parameters if the MaxBidiStreamNum was reduced", func() {
p.MaxBidiStreamNum = saved.MaxBidiStreamNum - 1
Expect(p.ValidFor0RTT(saved)).To(BeFalse())

2
internal/wire/transport_parameters.go
View file

@ -444,7 +444,7 @@ func (p *TransportParameters) ValidFor0RTT(saved *TransportParameters) bool {
return p.InitialMaxStreamDataBidiLocal >= saved.InitialMaxStreamDataBidiLocal &&
p.InitialMaxStreamDataBidiRemote >= saved.InitialMaxStreamDataBidiRemote &&
p.InitialMaxStreamDataUni >= saved.InitialMaxStreamDataUni &&
p.InitialMaxData == saved.InitialMaxData &&
p.InitialMaxData >= saved.InitialMaxData &&
p.MaxBidiStreamNum >= saved.MaxBidiStreamNum &&
p.MaxUniStreamNum >= saved.MaxUniStreamNum &&
p.ActiveConnectionIDLimit == saved.ActiveConnectionIDLimit