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zero_rtt_test.go
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zero_rtt_test.go
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package self_test
import (
"context"
"crypto/tls"
"fmt"
"io"
mrand "math/rand"
"net"
"sort"
"sync"
"sync/atomic"
"time"
"github.com/lucas-clemente/quic-go"
quicproxy "github.com/lucas-clemente/quic-go/integrationtests/tools/proxy"
"github.com/lucas-clemente/quic-go/internal/protocol"
"github.com/lucas-clemente/quic-go/internal/wire"
"github.com/lucas-clemente/quic-go/logging"
. "github.com/onsi/ginkgo"
. "github.com/onsi/ginkgo/extensions/table"
. "github.com/onsi/gomega"
)
var _ = Describe("0-RTT", func() {
rtt := scaleDuration(5 * time.Millisecond)
for _, v := range protocol.SupportedVersions {
version := v
Context(fmt.Sprintf("with QUIC version %s", version), func() {
runCountingProxy := func(serverPort int) (*quicproxy.QuicProxy, *uint32) {
var num0RTTPackets uint32 // to be used as an atomic
proxy, err := quicproxy.NewQuicProxy("localhost:0", &quicproxy.Opts{
RemoteAddr: fmt.Sprintf("localhost:%d", serverPort),
DelayPacket: func(_ quicproxy.Direction, data []byte) time.Duration {
for len(data) > 0 {
hdr, _, rest, err := wire.ParsePacket(data, 0)
Expect(err).ToNot(HaveOccurred())
if hdr.Type == protocol.PacketType0RTT {
atomic.AddUint32(&num0RTTPackets, 1)
break
}
data = rest
}
return rtt / 2
},
})
Expect(err).ToNot(HaveOccurred())
return proxy, &num0RTTPackets
}
dialAndReceiveSessionTicket := func(serverConf *quic.Config) (*tls.Config, *tls.Config) {
tlsConf := getTLSConfig()
if serverConf == nil {
serverConf = getQuicConfig(nil)
serverConf.Versions = []protocol.VersionNumber{version}
}
ln, err := quic.ListenAddrEarly(
"localhost:0",
tlsConf,
serverConf,
)
Expect(err).ToNot(HaveOccurred())
defer ln.Close()
proxy, err := quicproxy.NewQuicProxy("localhost:0", &quicproxy.Opts{
RemoteAddr: fmt.Sprintf("localhost:%d", ln.Addr().(*net.UDPAddr).Port),
DelayPacket: func(_ quicproxy.Direction, data []byte) time.Duration { return rtt / 2 },
})
Expect(err).ToNot(HaveOccurred())
defer proxy.Close()
// dial the first connection in order to receive a session ticket
done := make(chan struct{})
go func() {
defer GinkgoRecover()
defer close(done)
conn, err := ln.Accept(context.Background())
Expect(err).ToNot(HaveOccurred())
<-conn.Context().Done()
}()
clientConf := getTLSClientConfig()
gets := make(chan string, 100)
puts := make(chan string, 100)
clientConf.ClientSessionCache = newClientSessionCache(gets, puts)
conn, err := quic.DialAddr(
fmt.Sprintf("localhost:%d", proxy.LocalPort()),
clientConf,
getQuicConfig(&quic.Config{Versions: []protocol.VersionNumber{version}}),
)
Expect(err).ToNot(HaveOccurred())
Eventually(puts).Should(Receive())
// received the session ticket. We're done here.
Expect(conn.CloseWithError(0, "")).To(Succeed())
Eventually(done).Should(BeClosed())
return tlsConf, clientConf
}
transfer0RTTData := func(
ln quic.EarlyListener,
proxyPort int,
clientTLSConf *tls.Config,
clientConf *quic.Config,
testdata []byte, // data to transfer
) {
// now dial the second connection, and use 0-RTT to send some data
done := make(chan struct{})
go func() {
defer GinkgoRecover()
conn, err := ln.Accept(context.Background())
Expect(err).ToNot(HaveOccurred())
str, err := conn.AcceptUniStream(context.Background())
Expect(err).ToNot(HaveOccurred())
data, err := io.ReadAll(str)
Expect(err).ToNot(HaveOccurred())
Expect(data).To(Equal(testdata))
Expect(conn.ConnectionState().TLS.Used0RTT).To(BeTrue())
Expect(conn.CloseWithError(0, "")).To(Succeed())
close(done)
}()
if clientConf == nil {
clientConf = getQuicConfig(&quic.Config{Versions: []protocol.VersionNumber{version}})
}
conn, err := quic.DialAddrEarly(
fmt.Sprintf("localhost:%d", proxyPort),
clientTLSConf,
clientConf,
)
Expect(err).ToNot(HaveOccurred())
defer conn.CloseWithError(0, "")
str, err := conn.OpenUniStream()
Expect(err).ToNot(HaveOccurred())
_, err = str.Write(testdata)
Expect(err).ToNot(HaveOccurred())
Expect(str.Close()).To(Succeed())
Expect(conn.ConnectionState().TLS.Used0RTT).To(BeTrue())
Eventually(done).Should(BeClosed())
Eventually(conn.Context().Done()).Should(BeClosed())
}
check0RTTRejected := func(
ln quic.EarlyListener,
proxyPort int,
clientConf *tls.Config,
) {
conn, err := quic.DialAddrEarly(
fmt.Sprintf("localhost:%d", proxyPort),
clientConf,
getQuicConfig(&quic.Config{Versions: []protocol.VersionNumber{version}}),
)
Expect(err).ToNot(HaveOccurred())
str, err := conn.OpenUniStream()
Expect(err).ToNot(HaveOccurred())
_, err = str.Write(make([]byte, 3000))
Expect(err).ToNot(HaveOccurred())
Expect(str.Close()).To(Succeed())
Expect(conn.ConnectionState().TLS.Used0RTT).To(BeFalse())
// make sure the server doesn't process the data
ctx, cancel := context.WithTimeout(context.Background(), scaleDuration(50*time.Millisecond))
defer cancel()
serverConn, err := ln.Accept(ctx)
Expect(err).ToNot(HaveOccurred())
Expect(serverConn.ConnectionState().TLS.Used0RTT).To(BeFalse())
_, err = serverConn.AcceptUniStream(ctx)
Expect(err).To(Equal(context.DeadlineExceeded))
Expect(serverConn.CloseWithError(0, "")).To(Succeed())
Eventually(conn.Context().Done()).Should(BeClosed())
}
// can be used to extract 0-RTT from a packetTracer
get0RTTPackets := func(packets []packet) []protocol.PacketNumber {
var zeroRTTPackets []protocol.PacketNumber
for _, p := range packets {
if p.hdr.Type == protocol.PacketType0RTT {
zeroRTTPackets = append(zeroRTTPackets, p.hdr.PacketNumber)
}
}
return zeroRTTPackets
}
for _, l := range []int{0, 15} {
connIDLen := l
It(fmt.Sprintf("transfers 0-RTT data, with %d byte connection IDs", connIDLen), func() {
tlsConf, clientTLSConf := dialAndReceiveSessionTicket(nil)
tracer := newPacketTracer()
ln, err := quic.ListenAddrEarly(
"localhost:0",
tlsConf,
getQuicConfig(&quic.Config{
Versions: []protocol.VersionNumber{version},
Tracer: newTracer(func() logging.ConnectionTracer { return tracer }),
}),
)
Expect(err).ToNot(HaveOccurred())
defer ln.Close()
proxy, num0RTTPackets := runCountingProxy(ln.Addr().(*net.UDPAddr).Port)
defer proxy.Close()
transfer0RTTData(
ln,
proxy.LocalPort(),
clientTLSConf,
&quic.Config{
ConnectionIDLength: connIDLen,
Versions: []protocol.VersionNumber{version},
},
PRData,
)
var numNewConnIDs int
for _, p := range tracer.getRcvdPackets() {
for _, f := range p.frames {
if _, ok := f.(*logging.NewConnectionIDFrame); ok {
numNewConnIDs++
}
}
}
if connIDLen == 0 {
Expect(numNewConnIDs).To(BeZero())
} else {
Expect(numNewConnIDs).ToNot(BeZero())
}
num0RTT := atomic.LoadUint32(num0RTTPackets)
fmt.Fprintf(GinkgoWriter, "Sent %d 0-RTT packets.", num0RTT)
Expect(num0RTT).ToNot(BeZero())
zeroRTTPackets := get0RTTPackets(tracer.getRcvdPackets())
Expect(len(zeroRTTPackets)).To(BeNumerically(">", 10))
sort.Slice(zeroRTTPackets, func(i, j int) bool { return zeroRTTPackets[i] < zeroRTTPackets[j] })
Expect(zeroRTTPackets[0]).To(Equal(protocol.PacketNumber(0)))
})
}
// Test that data intended to be sent with 1-RTT protection is not sent in 0-RTT packets.
It("waits for a connection until the handshake is done", func() {
tlsConf, clientConf := dialAndReceiveSessionTicket(nil)
zeroRTTData := GeneratePRData(2 * 1100) // 2 packets
oneRTTData := PRData
tracer := newPacketTracer()
ln, err := quic.ListenAddrEarly(
"localhost:0",
tlsConf,
getQuicConfig(&quic.Config{
Versions: []protocol.VersionNumber{version},
Tracer: newTracer(func() logging.ConnectionTracer { return tracer }),
}),
)
Expect(err).ToNot(HaveOccurred())
defer ln.Close()
// now dial the second connection, and use 0-RTT to send some data
go func() {
defer GinkgoRecover()
conn, err := ln.Accept(context.Background())
Expect(err).ToNot(HaveOccurred())
str, err := conn.AcceptUniStream(context.Background())
Expect(err).ToNot(HaveOccurred())
data, err := io.ReadAll(str)
Expect(err).ToNot(HaveOccurred())
Expect(data).To(Equal(zeroRTTData))
str, err = conn.AcceptUniStream(context.Background())
Expect(err).ToNot(HaveOccurred())
data, err = io.ReadAll(str)
Expect(err).ToNot(HaveOccurred())
Expect(data).To(Equal(oneRTTData))
Expect(conn.CloseWithError(0, "")).To(Succeed())
}()
proxy, num0RTTPackets := runCountingProxy(ln.Addr().(*net.UDPAddr).Port)
defer proxy.Close()
conn, err := quic.DialAddrEarly(
fmt.Sprintf("localhost:%d", proxy.LocalPort()),
clientConf,
getQuicConfig(&quic.Config{Versions: []protocol.VersionNumber{version}}),
)
Expect(err).ToNot(HaveOccurred())
sent0RTT := make(chan struct{})
go func() {
defer GinkgoRecover()
defer close(sent0RTT)
str, err := conn.OpenUniStream()
Expect(err).ToNot(HaveOccurred())
_, err = str.Write(zeroRTTData)
Expect(err).ToNot(HaveOccurred())
Expect(str.Close()).To(Succeed())
}()
Eventually(sent0RTT).Should(BeClosed())
// wait for the handshake to complete
Eventually(conn.HandshakeComplete().Done()).Should(BeClosed())
str, err := conn.OpenUniStream()
Expect(err).ToNot(HaveOccurred())
_, err = str.Write(PRData)
Expect(err).ToNot(HaveOccurred())
Expect(str.Close()).To(Succeed())
<-conn.Context().Done()
num0RTT := atomic.LoadUint32(num0RTTPackets)
fmt.Fprintf(GinkgoWriter, "Sent %d 0-RTT packets.", num0RTT)
Expect(num0RTT).To(Or(BeEquivalentTo(2), BeEquivalentTo(3))) // the FIN might be sent in a separate packet
Expect(get0RTTPackets(tracer.getRcvdPackets())).To(HaveLen(int(num0RTT)))
})
It("transfers 0-RTT data, when 0-RTT packets are lost", func() {
var (
num0RTTPackets uint32 // to be used as an atomic
num0RTTDropped uint32
)
tlsConf, clientConf := dialAndReceiveSessionTicket(nil)
tracer := newPacketTracer()
ln, err := quic.ListenAddrEarly(
"localhost:0",
tlsConf,
getQuicConfig(&quic.Config{
Versions: []protocol.VersionNumber{version},
Tracer: newTracer(func() logging.ConnectionTracer { return tracer }),
}),
)
Expect(err).ToNot(HaveOccurred())
defer ln.Close()
proxy, err := quicproxy.NewQuicProxy("localhost:0", &quicproxy.Opts{
RemoteAddr: fmt.Sprintf("localhost:%d", ln.Addr().(*net.UDPAddr).Port),
DelayPacket: func(_ quicproxy.Direction, data []byte) time.Duration {
hdr, _, _, err := wire.ParsePacket(data, 0)
Expect(err).ToNot(HaveOccurred())
if hdr.Type == protocol.PacketType0RTT {
atomic.AddUint32(&num0RTTPackets, 1)
}
return rtt / 2
},
DropPacket: func(_ quicproxy.Direction, data []byte) bool {
hdr, _, _, err := wire.ParsePacket(data, 0)
Expect(err).ToNot(HaveOccurred())
if hdr.Type == protocol.PacketType0RTT {
// drop 25% of the 0-RTT packets
drop := mrand.Intn(4) == 0
if drop {
atomic.AddUint32(&num0RTTDropped, 1)
}
return drop
}
return false
},
})
Expect(err).ToNot(HaveOccurred())
defer proxy.Close()
transfer0RTTData(ln, proxy.LocalPort(), clientConf, nil, PRData)
num0RTT := atomic.LoadUint32(&num0RTTPackets)
numDropped := atomic.LoadUint32(&num0RTTDropped)
fmt.Fprintf(GinkgoWriter, "Sent %d 0-RTT packets. Dropped %d of those.", num0RTT, numDropped)
Expect(numDropped).ToNot(BeZero())
Expect(num0RTT).ToNot(BeZero())
Expect(get0RTTPackets(tracer.getRcvdPackets())).ToNot(BeEmpty())
})
It("retransmits all 0-RTT data when the server performs a Retry", func() {
var mutex sync.Mutex
var firstConnID, secondConnID *protocol.ConnectionID
var firstCounter, secondCounter protocol.ByteCount
tlsConf, clientConf := dialAndReceiveSessionTicket(nil)
countZeroRTTBytes := func(data []byte) (n protocol.ByteCount) {
for len(data) > 0 {
hdr, _, rest, err := wire.ParsePacket(data, 0)
if err != nil {
return
}
data = rest
if hdr.Type == protocol.PacketType0RTT {
n += hdr.Length - 16 /* AEAD tag */
}
}
return
}
tracer := newPacketTracer()
ln, err := quic.ListenAddrEarly(
"localhost:0",
tlsConf,
getQuicConfig(&quic.Config{
Versions: []protocol.VersionNumber{version},
RequireAddressValidation: func(net.Addr) bool { return true },
Tracer: newTracer(func() logging.ConnectionTracer { return tracer }),
}),
)
Expect(err).ToNot(HaveOccurred())
defer ln.Close()
proxy, err := quicproxy.NewQuicProxy("localhost:0", &quicproxy.Opts{
RemoteAddr: fmt.Sprintf("localhost:%d", ln.Addr().(*net.UDPAddr).Port),
DelayPacket: func(dir quicproxy.Direction, data []byte) time.Duration {
connID, err := wire.ParseConnectionID(data, 0)
Expect(err).ToNot(HaveOccurred())
mutex.Lock()
defer mutex.Unlock()
if zeroRTTBytes := countZeroRTTBytes(data); zeroRTTBytes > 0 {
if firstConnID == nil {
firstConnID = &connID
firstCounter += zeroRTTBytes
} else if firstConnID != nil && *firstConnID == connID {
Expect(secondConnID).To(BeNil())
firstCounter += zeroRTTBytes
} else if secondConnID == nil {
secondConnID = &connID
secondCounter += zeroRTTBytes
} else if secondConnID != nil && *secondConnID == connID {
secondCounter += zeroRTTBytes
} else {
Fail("received 3 connection IDs on 0-RTT packets")
}
}
return rtt / 2
},
})
Expect(err).ToNot(HaveOccurred())
defer proxy.Close()
transfer0RTTData(ln, proxy.LocalPort(), clientConf, nil, GeneratePRData(5000)) // ~5 packets
mutex.Lock()
defer mutex.Unlock()
Expect(firstCounter).To(BeNumerically("~", 5000+100 /* framing overhead */, 100)) // the FIN bit might be sent extra
Expect(secondCounter).To(BeNumerically("~", firstCounter, 20))
zeroRTTPackets := get0RTTPackets(tracer.getRcvdPackets())
Expect(len(zeroRTTPackets)).To(BeNumerically(">=", 5))
Expect(zeroRTTPackets[0]).To(BeNumerically(">=", protocol.PacketNumber(5)))
})
It("doesn't reject 0-RTT when the server's transport stream limit increased", func() {
const maxStreams = 1
tlsConf, clientConf := dialAndReceiveSessionTicket(getQuicConfig(&quic.Config{
MaxIncomingUniStreams: maxStreams,
}))
tracer := newPacketTracer()
ln, err := quic.ListenAddrEarly(
"localhost:0",
tlsConf,
getQuicConfig(&quic.Config{
Versions: []protocol.VersionNumber{version},
MaxIncomingUniStreams: maxStreams + 1,
Tracer: newTracer(func() logging.ConnectionTracer { return tracer }),
}),
)
Expect(err).ToNot(HaveOccurred())
defer ln.Close()
proxy, _ := runCountingProxy(ln.Addr().(*net.UDPAddr).Port)
defer proxy.Close()
conn, err := quic.DialAddrEarly(
fmt.Sprintf("localhost:%d", proxy.LocalPort()),
clientConf,
getQuicConfig(&quic.Config{Versions: []protocol.VersionNumber{version}}),
)
Expect(err).ToNot(HaveOccurred())
str, err := conn.OpenUniStream()
Expect(err).ToNot(HaveOccurred())
_, err = str.Write([]byte("foobar"))
Expect(err).ToNot(HaveOccurred())
Expect(str.Close()).To(Succeed())
// The client remembers the old limit and refuses to open a new stream.
_, err = conn.OpenUniStream()
Expect(err).To(HaveOccurred())
Expect(err.Error()).To(ContainSubstring("too many open streams"))
ctx, cancel := context.WithTimeout(context.Background(), time.Second)
defer cancel()
_, err = conn.OpenUniStreamSync(ctx)
Expect(err).ToNot(HaveOccurred())
Expect(conn.ConnectionState().TLS.Used0RTT).To(BeTrue())
Expect(conn.CloseWithError(0, "")).To(Succeed())
})
It("rejects 0-RTT when the server's stream limit decreased", func() {
const maxStreams = 42
tlsConf, clientConf := dialAndReceiveSessionTicket(getQuicConfig(&quic.Config{
MaxIncomingStreams: maxStreams,
}))
tracer := newPacketTracer()
ln, err := quic.ListenAddrEarly(
"localhost:0",
tlsConf,
getQuicConfig(&quic.Config{
Versions: []protocol.VersionNumber{version},
MaxIncomingStreams: maxStreams - 1,
Tracer: newTracer(func() logging.ConnectionTracer { return tracer }),
}),
)
Expect(err).ToNot(HaveOccurred())
defer ln.Close()
proxy, num0RTTPackets := runCountingProxy(ln.Addr().(*net.UDPAddr).Port)
defer proxy.Close()
check0RTTRejected(ln, proxy.LocalPort(), clientConf)
// The client should send 0-RTT packets, but the server doesn't process them.
num0RTT := atomic.LoadUint32(num0RTTPackets)
fmt.Fprintf(GinkgoWriter, "Sent %d 0-RTT packets.", num0RTT)
Expect(num0RTT).ToNot(BeZero())
Expect(get0RTTPackets(tracer.getRcvdPackets())).To(BeEmpty())
})
It("rejects 0-RTT when the ALPN changed", func() {
tlsConf, clientConf := dialAndReceiveSessionTicket(nil)
// now close the listener and dial new connection with a different ALPN
clientConf.NextProtos = []string{"new-alpn"}
tlsConf.NextProtos = []string{"new-alpn"}
tracer := newPacketTracer()
ln, err := quic.ListenAddrEarly(
"localhost:0",
tlsConf,
getQuicConfig(&quic.Config{
Versions: []protocol.VersionNumber{version},
Tracer: newTracer(func() logging.ConnectionTracer { return tracer }),
}),
)
Expect(err).ToNot(HaveOccurred())
defer ln.Close()
proxy, num0RTTPackets := runCountingProxy(ln.Addr().(*net.UDPAddr).Port)
defer proxy.Close()
check0RTTRejected(ln, proxy.LocalPort(), clientConf)
// The client should send 0-RTT packets, but the server doesn't process them.
num0RTT := atomic.LoadUint32(num0RTTPackets)
fmt.Fprintf(GinkgoWriter, "Sent %d 0-RTT packets.", num0RTT)
Expect(num0RTT).ToNot(BeZero())
Expect(get0RTTPackets(tracer.getRcvdPackets())).To(BeEmpty())
})
DescribeTable("flow control limits",
func(addFlowControlLimit func(*quic.Config, uint64)) {
tracer := newPacketTracer()
firstConf := getQuicConfig(&quic.Config{
Versions: []protocol.VersionNumber{version},
})
addFlowControlLimit(firstConf, 3)
tlsConf, clientConf := dialAndReceiveSessionTicket(firstConf)
secondConf := getQuicConfig(&quic.Config{
Versions: []protocol.VersionNumber{version},
Tracer: newTracer(func() logging.ConnectionTracer { return tracer }),
})
addFlowControlLimit(secondConf, 100)
ln, err := quic.ListenAddrEarly(
"localhost:0",
tlsConf,
secondConf,
)
Expect(err).ToNot(HaveOccurred())
defer ln.Close()
proxy, _ := runCountingProxy(ln.Addr().(*net.UDPAddr).Port)
defer proxy.Close()
conn, err := quic.DialAddrEarly(
fmt.Sprintf("localhost:%d", proxy.LocalPort()),
clientConf,
getQuicConfig(&quic.Config{Versions: []protocol.VersionNumber{version}}),
)
Expect(err).ToNot(HaveOccurred())
str, err := conn.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())
}()
Eventually(written).Should(BeClosed())
serverConn, err := ln.Accept(context.Background())
Expect(err).ToNot(HaveOccurred())
rstr, err := serverConn.AcceptUniStream(context.Background())
Expect(err).ToNot(HaveOccurred())
data, err := io.ReadAll(rstr)
Expect(err).ToNot(HaveOccurred())
Expect(data).To(Equal([]byte("foobar")))
Expect(serverConn.ConnectionState().TLS.Used0RTT).To(BeTrue())
Expect(serverConn.CloseWithError(0, "")).To(Succeed())
Eventually(conn.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 }),
)
for _, l := range []int{0, 15} {
connIDLen := l
It(fmt.Sprintf("correctly deals with 0-RTT rejections, for %d byte connection IDs", connIDLen), func() {
tlsConf, clientConf := dialAndReceiveSessionTicket(nil)
// now dial new connection with different transport parameters
tracer := newPacketTracer()
ln, err := quic.ListenAddrEarly(
"localhost:0",
tlsConf,
getQuicConfig(&quic.Config{
Versions: []protocol.VersionNumber{version},
MaxIncomingUniStreams: 1,
Tracer: newTracer(func() logging.ConnectionTracer { return tracer }),
}),
)
Expect(err).ToNot(HaveOccurred())
defer ln.Close()
proxy, num0RTTPackets := runCountingProxy(ln.Addr().(*net.UDPAddr).Port)
defer proxy.Close()
conn, err := quic.DialAddrEarly(
fmt.Sprintf("localhost:%d", proxy.LocalPort()),
clientConf,
getQuicConfig(&quic.Config{Versions: []protocol.VersionNumber{version}}),
)
Expect(err).ToNot(HaveOccurred())
// The client remembers that it was allowed to open 2 uni-directional streams.
firstStr, err := conn.OpenUniStream()
Expect(err).ToNot(HaveOccurred())
written := make(chan struct{}, 2)
go func() {
defer GinkgoRecover()
defer func() { written <- struct{}{} }()
_, err := firstStr.Write([]byte("first flight"))
Expect(err).ToNot(HaveOccurred())
}()
secondStr, err := conn.OpenUniStream()
Expect(err).ToNot(HaveOccurred())
go func() {
defer GinkgoRecover()
defer func() { written <- struct{}{} }()
_, err := secondStr.Write([]byte("first flight"))
Expect(err).ToNot(HaveOccurred())
}()
ctx, cancel := context.WithTimeout(context.Background(), time.Second)
defer cancel()
_, err = conn.AcceptStream(ctx)
Expect(err).To(MatchError(quic.Err0RTTRejected))
Eventually(written).Should(Receive())
Eventually(written).Should(Receive())
_, err = firstStr.Write([]byte("foobar"))
Expect(err).To(MatchError(quic.Err0RTTRejected))
_, err = conn.OpenUniStream()
Expect(err).To(MatchError(quic.Err0RTTRejected))
_, err = conn.AcceptStream(ctx)
Expect(err).To(Equal(quic.Err0RTTRejected))
newConn := conn.NextConnection()
str, err := newConn.OpenUniStream()
Expect(err).ToNot(HaveOccurred())
_, err = newConn.OpenUniStream()
Expect(err).To(HaveOccurred())
Expect(err.Error()).To(ContainSubstring("too many open streams"))
_, err = str.Write([]byte("second flight"))
Expect(err).ToNot(HaveOccurred())
Expect(str.Close()).To(Succeed())
Expect(conn.CloseWithError(0, "")).To(Succeed())
// The client should send 0-RTT packets, but the server doesn't process them.
num0RTT := atomic.LoadUint32(num0RTTPackets)
fmt.Fprintf(GinkgoWriter, "Sent %d 0-RTT packets.", num0RTT)
Expect(num0RTT).ToNot(BeZero())
Expect(get0RTTPackets(tracer.getRcvdPackets())).To(BeEmpty())
})
}
It("queues 0-RTT packets, if the Initial is delayed", func() {
tlsConf, clientConf := dialAndReceiveSessionTicket(nil)
tracer := newPacketTracer()
ln, err := quic.ListenAddrEarly(
"localhost:0",
tlsConf,
getQuicConfig(&quic.Config{
Versions: []protocol.VersionNumber{version},
Tracer: newTracer(func() logging.ConnectionTracer { return tracer }),
}),
)
Expect(err).ToNot(HaveOccurred())
defer ln.Close()
proxy, err := quicproxy.NewQuicProxy("localhost:0", &quicproxy.Opts{
RemoteAddr: ln.Addr().String(),
DelayPacket: func(dir quicproxy.Direction, data []byte) time.Duration {
if dir == quicproxy.DirectionIncoming && wire.IsLongHeaderPacket(data[0]) && data[0]&0x30>>4 == 0 { // Initial packet from client
return rtt/2 + rtt
}
return rtt / 2
},
})
Expect(err).ToNot(HaveOccurred())
defer proxy.Close()
transfer0RTTData(ln, proxy.LocalPort(), clientConf, nil, PRData)
Expect(tracer.getRcvdPackets()[0].hdr.Type).To(Equal(protocol.PacketTypeInitial))
zeroRTTPackets := get0RTTPackets(tracer.getRcvdPackets())
Expect(len(zeroRTTPackets)).To(BeNumerically(">", 10))
Expect(zeroRTTPackets[0]).To(Equal(protocol.PacketNumber(0)))
})
})
}
})