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server_test.go
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package quic
import (
"bytes"
"context"
"crypto/rand"
"crypto/tls"
"errors"
"net"
"reflect"
"runtime/pprof"
"strings"
"sync"
"sync/atomic"
"time"
"github.com/lucas-clemente/quic-go/internal/handshake"
mocklogging "github.com/lucas-clemente/quic-go/internal/mocks/logging"
"github.com/lucas-clemente/quic-go/internal/protocol"
"github.com/lucas-clemente/quic-go/internal/qerr"
"github.com/lucas-clemente/quic-go/internal/testdata"
"github.com/lucas-clemente/quic-go/internal/utils"
"github.com/lucas-clemente/quic-go/internal/wire"
"github.com/lucas-clemente/quic-go/logging"
"github.com/lucas-clemente/quic-go/quictrace"
"github.com/golang/mock/gomock"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
)
func areServersRunning() bool {
var b bytes.Buffer
pprof.Lookup("goroutine").WriteTo(&b, 1)
return strings.Contains(b.String(), "quic-go.(*baseServer).run")
}
var _ = Describe("Server", func() {
var (
conn *MockPacketConn
tlsConf *tls.Config
)
getPacket := func(hdr *wire.Header, p []byte) *receivedPacket {
buffer := getPacketBuffer()
buf := bytes.NewBuffer(buffer.Data)
if hdr.IsLongHeader {
hdr.Length = 4 + protocol.ByteCount(len(p)) + 16
}
Expect((&wire.ExtendedHeader{
Header: *hdr,
PacketNumber: 0x42,
PacketNumberLen: protocol.PacketNumberLen4,
}).Write(buf, protocol.VersionTLS)).To(Succeed())
n := buf.Len()
buf.Write(p)
data := buffer.Data[:buf.Len()]
sealer, _ := handshake.NewInitialAEAD(hdr.DestConnectionID, protocol.PerspectiveClient)
_ = sealer.Seal(data[n:n], data[n:], 0x42, data[:n])
data = data[:len(data)+16]
sealer.EncryptHeader(data[n:n+16], &data[0], data[n-4:n])
return &receivedPacket{
remoteAddr: &net.UDPAddr{IP: net.IPv4(4, 5, 6, 7), Port: 456},
data: data,
buffer: buffer,
}
}
getInitial := func(destConnID protocol.ConnectionID) *receivedPacket {
senderAddr := &net.UDPAddr{IP: net.IPv4(1, 2, 3, 4), Port: 42}
hdr := &wire.Header{
IsLongHeader: true,
Type: protocol.PacketTypeInitial,
SrcConnectionID: protocol.ConnectionID{5, 4, 3, 2, 1},
DestConnectionID: destConnID,
Version: protocol.VersionTLS,
}
p := getPacket(hdr, make([]byte, protocol.MinInitialPacketSize))
p.buffer = getPacketBuffer()
p.remoteAddr = senderAddr
return p
}
getInitialWithRandomDestConnID := func() *receivedPacket {
destConnID := make([]byte, 10)
_, err := rand.Read(destConnID)
Expect(err).ToNot(HaveOccurred())
return getInitial(destConnID)
}
parseHeader := func(data []byte) *wire.Header {
hdr, _, _, err := wire.ParsePacket(data, 0)
Expect(err).ToNot(HaveOccurred())
return hdr
}
BeforeEach(func() {
conn = NewMockPacketConn(mockCtrl)
conn.EXPECT().LocalAddr().Return(&net.UDPAddr{}).AnyTimes()
conn.EXPECT().ReadFrom(gomock.Any()).Do(func(_ []byte) { <-(make(chan struct{})) }).MaxTimes(1)
tlsConf = testdata.GetTLSConfig()
tlsConf.NextProtos = []string{"proto1"}
})
AfterEach(func() {
Eventually(areServersRunning).Should(BeFalse())
})
It("errors when no tls.Config is given", func() {
_, err := ListenAddr("localhost:0", nil, nil)
Expect(err).To(HaveOccurred())
Expect(err.Error()).To(ContainSubstring("quic: tls.Config not set"))
})
It("errors when the Config contains an invalid version", func() {
version := protocol.VersionNumber(0x1234)
_, err := Listen(nil, tlsConf, &Config{Versions: []protocol.VersionNumber{version}})
Expect(err).To(MatchError("0x1234 is not a valid QUIC version"))
})
It("fills in default values if options are not set in the Config", func() {
ln, err := Listen(conn, tlsConf, &Config{})
Expect(err).ToNot(HaveOccurred())
server := ln.(*baseServer)
Expect(server.config.Versions).To(Equal(protocol.SupportedVersions))
Expect(server.config.HandshakeTimeout).To(Equal(protocol.DefaultHandshakeTimeout))
Expect(server.config.MaxIdleTimeout).To(Equal(protocol.DefaultIdleTimeout))
Expect(reflect.ValueOf(server.config.AcceptToken)).To(Equal(reflect.ValueOf(defaultAcceptToken)))
Expect(server.config.KeepAlive).To(BeFalse())
// stop the listener
Expect(ln.Close()).To(Succeed())
})
It("setups with the right values", func() {
supportedVersions := []protocol.VersionNumber{protocol.VersionTLS}
acceptToken := func(_ net.Addr, _ *Token) bool { return true }
tracer := quictrace.NewTracer()
config := Config{
Versions: supportedVersions,
AcceptToken: acceptToken,
HandshakeTimeout: 1337 * time.Hour,
MaxIdleTimeout: 42 * time.Minute,
KeepAlive: true,
StatelessResetKey: []byte("foobar"),
QuicTracer: tracer,
}
ln, err := Listen(conn, tlsConf, &config)
Expect(err).ToNot(HaveOccurred())
server := ln.(*baseServer)
Expect(server.sessionHandler).ToNot(BeNil())
Expect(server.config.Versions).To(Equal(supportedVersions))
Expect(server.config.HandshakeTimeout).To(Equal(1337 * time.Hour))
Expect(server.config.MaxIdleTimeout).To(Equal(42 * time.Minute))
Expect(reflect.ValueOf(server.config.AcceptToken)).To(Equal(reflect.ValueOf(acceptToken)))
Expect(server.config.KeepAlive).To(BeTrue())
Expect(server.config.StatelessResetKey).To(Equal([]byte("foobar")))
Expect(server.config.QuicTracer).To(Equal(tracer))
// stop the listener
Expect(ln.Close()).To(Succeed())
})
It("listens on a given address", func() {
addr := "127.0.0.1:13579"
ln, err := ListenAddr(addr, tlsConf, &Config{})
Expect(err).ToNot(HaveOccurred())
Expect(ln.Addr().String()).To(Equal(addr))
// stop the listener
Expect(ln.Close()).To(Succeed())
})
It("errors if given an invalid address", func() {
addr := "127.0.0.1"
_, err := ListenAddr(addr, tlsConf, &Config{})
Expect(err).To(BeAssignableToTypeOf(&net.AddrError{}))
})
It("errors if given an invalid address", func() {
addr := "1.1.1.1:1111"
_, err := ListenAddr(addr, tlsConf, &Config{})
Expect(err).To(BeAssignableToTypeOf(&net.OpError{}))
})
Context("server accepting sessions that completed the handshake", func() {
var (
serv *baseServer
phm *MockPacketHandlerManager
tracer *mocklogging.MockTracer
)
BeforeEach(func() {
tracer = mocklogging.NewMockTracer(mockCtrl)
ln, err := Listen(conn, tlsConf, &Config{Tracer: tracer})
Expect(err).ToNot(HaveOccurred())
serv = ln.(*baseServer)
phm = NewMockPacketHandlerManager(mockCtrl)
serv.sessionHandler = phm
})
AfterEach(func() {
phm.EXPECT().CloseServer().MaxTimes(1)
serv.Close()
})
Context("handling packets", func() {
It("drops Initial packets with a too short connection ID", func() {
p := getPacket(&wire.Header{
IsLongHeader: true,
Type: protocol.PacketTypeInitial,
DestConnectionID: protocol.ConnectionID{1, 2, 3, 4},
Version: serv.config.Versions[0],
}, nil)
tracer.EXPECT().DroppedPacket(p.remoteAddr, logging.PacketTypeInitial, p.Size(), logging.PacketDropUnexpectedPacket)
serv.handlePacket(p)
// make sure there are no Write calls on the packet conn
time.Sleep(50 * time.Millisecond)
})
It("drops too small Initial", func() {
p := getPacket(&wire.Header{
IsLongHeader: true,
Type: protocol.PacketTypeInitial,
DestConnectionID: protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8},
Version: serv.config.Versions[0],
}, make([]byte, protocol.MinInitialPacketSize-100),
)
tracer.EXPECT().DroppedPacket(p.remoteAddr, logging.PacketTypeInitial, p.Size(), logging.PacketDropUnexpectedPacket)
serv.handlePacket(p)
// make sure there are no Write calls on the packet conn
time.Sleep(50 * time.Millisecond)
})
It("drops non-Initial packets", func() {
p := getPacket(&wire.Header{
IsLongHeader: true,
Type: protocol.PacketTypeHandshake,
Version: serv.config.Versions[0],
}, []byte("invalid"))
tracer.EXPECT().DroppedPacket(p.remoteAddr, logging.PacketTypeHandshake, p.Size(), logging.PacketDropUnexpectedPacket)
serv.handlePacket(p)
// make sure there are no Write calls on the packet conn
time.Sleep(50 * time.Millisecond)
})
It("decodes the token from the Token field", func() {
raddr := &net.UDPAddr{
IP: net.IPv4(192, 168, 13, 37),
Port: 1337,
}
done := make(chan struct{})
serv.config.AcceptToken = func(addr net.Addr, token *Token) bool {
Expect(addr).To(Equal(raddr))
Expect(token).ToNot(BeNil())
close(done)
return false
}
token, err := serv.tokenGenerator.NewRetryToken(raddr, nil, nil)
Expect(err).ToNot(HaveOccurred())
packet := getPacket(&wire.Header{
IsLongHeader: true,
Type: protocol.PacketTypeInitial,
Token: token,
Version: serv.config.Versions[0],
}, make([]byte, protocol.MinInitialPacketSize))
packet.remoteAddr = raddr
conn.EXPECT().WriteTo(gomock.Any(), gomock.Any()).MaxTimes(1)
tracer.EXPECT().SentPacket(gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any()).MaxTimes(1)
serv.handlePacket(packet)
Eventually(done).Should(BeClosed())
})
It("passes an empty token to the callback, if decoding fails", func() {
raddr := &net.UDPAddr{
IP: net.IPv4(192, 168, 13, 37),
Port: 1337,
}
done := make(chan struct{})
serv.config.AcceptToken = func(addr net.Addr, token *Token) bool {
Expect(addr).To(Equal(raddr))
Expect(token).To(BeNil())
close(done)
return false
}
packet := getPacket(&wire.Header{
IsLongHeader: true,
Type: protocol.PacketTypeInitial,
Token: []byte("foobar"),
Version: serv.config.Versions[0],
}, make([]byte, protocol.MinInitialPacketSize))
packet.remoteAddr = raddr
conn.EXPECT().WriteTo(gomock.Any(), gomock.Any()).MaxTimes(1)
tracer.EXPECT().SentPacket(gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any()).MaxTimes(1)
serv.handlePacket(packet)
Eventually(done).Should(BeClosed())
})
It("creates a session when the token is accepted", func() {
serv.config.AcceptToken = func(_ net.Addr, token *Token) bool { return true }
retryToken, err := serv.tokenGenerator.NewRetryToken(
&net.UDPAddr{},
protocol.ConnectionID{0xde, 0xad, 0xc0, 0xde},
protocol.ConnectionID{0xde, 0xca, 0xfb, 0xad},
)
Expect(err).ToNot(HaveOccurred())
hdr := &wire.Header{
IsLongHeader: true,
Type: protocol.PacketTypeInitial,
SrcConnectionID: protocol.ConnectionID{5, 4, 3, 2, 1},
DestConnectionID: protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8, 9, 10},
Version: protocol.VersionTLS,
Token: retryToken,
}
p := getPacket(hdr, make([]byte, protocol.MinInitialPacketSize))
run := make(chan struct{})
var token protocol.StatelessResetToken
rand.Read(token[:])
var newConnID protocol.ConnectionID
phm.EXPECT().AddWithConnID(protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}, gomock.Any(), gomock.Any()).DoAndReturn(func(_, c protocol.ConnectionID, fn func() packetHandler) bool {
newConnID = c
phm.EXPECT().GetStatelessResetToken(gomock.Any()).DoAndReturn(func(c protocol.ConnectionID) protocol.StatelessResetToken {
newConnID = c
return token
})
fn()
return true
})
tracer.EXPECT().TracerForConnection(protocol.PerspectiveServer, protocol.ConnectionID{0xde, 0xad, 0xc0, 0xde})
sess := NewMockQuicSession(mockCtrl)
serv.newSession = func(
_ sendConn,
_ sessionRunner,
origDestConnID protocol.ConnectionID,
retrySrcConnID *protocol.ConnectionID,
clientDestConnID protocol.ConnectionID,
destConnID protocol.ConnectionID,
srcConnID protocol.ConnectionID,
tokenP protocol.StatelessResetToken,
_ *Config,
_ *tls.Config,
_ *handshake.TokenGenerator,
enable0RTT bool,
_ logging.ConnectionTracer,
_ utils.Logger,
_ protocol.VersionNumber,
) quicSession {
Expect(enable0RTT).To(BeFalse())
Expect(origDestConnID).To(Equal(protocol.ConnectionID{0xde, 0xad, 0xc0, 0xde}))
Expect(retrySrcConnID).To(Equal(&protocol.ConnectionID{0xde, 0xca, 0xfb, 0xad}))
Expect(clientDestConnID).To(Equal(hdr.DestConnectionID))
Expect(destConnID).To(Equal(hdr.SrcConnectionID))
// make sure we're using a server-generated connection ID
Expect(srcConnID).ToNot(Equal(hdr.DestConnectionID))
Expect(srcConnID).ToNot(Equal(hdr.SrcConnectionID))
Expect(srcConnID).To(Equal(newConnID))
Expect(tokenP).To(Equal(token))
sess.EXPECT().handlePacket(p)
sess.EXPECT().run().Do(func() { close(run) })
sess.EXPECT().Context().Return(context.Background())
sess.EXPECT().HandshakeComplete().Return(context.Background())
return sess
}
done := make(chan struct{})
go func() {
defer GinkgoRecover()
serv.handlePacket(p)
// the Handshake packet is written by the session.
// Make sure there are no Write calls on the packet conn.
time.Sleep(50 * time.Millisecond)
close(done)
}()
// make sure we're using a server-generated connection ID
Eventually(run).Should(BeClosed())
Eventually(done).Should(BeClosed())
})
It("sends a Version Negotiation Packet for unsupported versions", func() {
srcConnID := protocol.ConnectionID{1, 2, 3, 4, 5}
destConnID := protocol.ConnectionID{1, 2, 3, 4, 5, 6}
packet := getPacket(&wire.Header{
IsLongHeader: true,
Type: protocol.PacketTypeHandshake,
SrcConnectionID: srcConnID,
DestConnectionID: destConnID,
Version: 0x42,
}, make([]byte, protocol.MinUnknownVersionPacketSize))
raddr := &net.UDPAddr{IP: net.IPv4(127, 0, 0, 1), Port: 1337}
packet.remoteAddr = raddr
tracer.EXPECT().SentPacket(packet.remoteAddr, gomock.Any(), gomock.Any(), nil).Do(func(_ net.Addr, replyHdr *logging.Header, _ logging.ByteCount, _ []logging.Frame) {
Expect(replyHdr.IsLongHeader).To(BeTrue())
Expect(replyHdr.Version).To(BeZero())
Expect(replyHdr.SrcConnectionID).To(Equal(destConnID))
Expect(replyHdr.DestConnectionID).To(Equal(srcConnID))
})
done := make(chan struct{})
conn.EXPECT().WriteTo(gomock.Any(), raddr).DoAndReturn(func(b []byte, _ net.Addr) (int, error) {
defer close(done)
Expect(wire.IsVersionNegotiationPacket(b)).To(BeTrue())
hdr, versions, err := wire.ParseVersionNegotiationPacket(bytes.NewReader(b))
Expect(err).ToNot(HaveOccurred())
Expect(hdr.DestConnectionID).To(Equal(srcConnID))
Expect(hdr.SrcConnectionID).To(Equal(destConnID))
Expect(versions).ToNot(ContainElement(protocol.VersionNumber(0x42)))
return len(b), nil
})
serv.handlePacket(packet)
Eventually(done).Should(BeClosed())
})
It("ignores Version Negotiation packets", func() {
data, err := wire.ComposeVersionNegotiation(
protocol.ConnectionID{1, 2, 3, 4},
protocol.ConnectionID{4, 3, 2, 1},
[]protocol.VersionNumber{1, 2, 3},
)
Expect(err).ToNot(HaveOccurred())
raddr := &net.UDPAddr{IP: net.IPv4(127, 0, 0, 1), Port: 1337}
done := make(chan struct{})
tracer.EXPECT().DroppedPacket(raddr, logging.PacketTypeVersionNegotiation, protocol.ByteCount(len(data)), logging.PacketDropUnexpectedPacket).Do(func(net.Addr, logging.PacketType, protocol.ByteCount, logging.PacketDropReason) {
close(done)
})
serv.handlePacket(&receivedPacket{
remoteAddr: raddr,
data: data,
buffer: getPacketBuffer(),
})
Eventually(done).Should(BeClosed())
// make sure no other packet is sent
time.Sleep(scaleDuration(20 * time.Millisecond))
})
It("doesn't send a Version Negotiation Packet for unsupported versions, if the packet is too small", func() {
srcConnID := protocol.ConnectionID{1, 2, 3, 4, 5}
destConnID := protocol.ConnectionID{1, 2, 3, 4, 5, 6}
p := getPacket(&wire.Header{
IsLongHeader: true,
Type: protocol.PacketTypeHandshake,
SrcConnectionID: srcConnID,
DestConnectionID: destConnID,
Version: 0x42,
}, make([]byte, protocol.MinUnknownVersionPacketSize-50))
Expect(p.Size()).To(BeNumerically("<", protocol.MinUnknownVersionPacketSize))
raddr := &net.UDPAddr{IP: net.IPv4(127, 0, 0, 1), Port: 1337}
p.remoteAddr = raddr
done := make(chan struct{})
tracer.EXPECT().DroppedPacket(raddr, logging.PacketTypeNotDetermined, p.Size(), logging.PacketDropUnexpectedPacket).Do(func(net.Addr, logging.PacketType, protocol.ByteCount, logging.PacketDropReason) {
close(done)
})
serv.handlePacket(p)
Eventually(done).Should(BeClosed())
// make sure no other packet is sent
time.Sleep(scaleDuration(20 * time.Millisecond))
})
It("replies with a Retry packet, if a Token is required", func() {
serv.config.AcceptToken = func(_ net.Addr, _ *Token) bool { return false }
hdr := &wire.Header{
IsLongHeader: true,
Type: protocol.PacketTypeInitial,
SrcConnectionID: protocol.ConnectionID{5, 4, 3, 2, 1},
DestConnectionID: protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8, 9, 10},
Version: protocol.VersionTLS,
}
packet := getPacket(hdr, make([]byte, protocol.MinInitialPacketSize))
raddr := &net.UDPAddr{IP: net.IPv4(127, 0, 0, 1), Port: 1337}
packet.remoteAddr = raddr
tracer.EXPECT().SentPacket(packet.remoteAddr, gomock.Any(), gomock.Any(), nil).Do(func(_ net.Addr, replyHdr *logging.Header, _ logging.ByteCount, _ []logging.Frame) {
Expect(replyHdr.Type).To(Equal(protocol.PacketTypeRetry))
Expect(replyHdr.SrcConnectionID).ToNot(Equal(hdr.DestConnectionID))
Expect(replyHdr.DestConnectionID).To(Equal(hdr.SrcConnectionID))
Expect(replyHdr.Token).ToNot(BeEmpty())
})
done := make(chan struct{})
conn.EXPECT().WriteTo(gomock.Any(), raddr).DoAndReturn(func(b []byte, _ net.Addr) (int, error) {
defer close(done)
replyHdr := parseHeader(b)
Expect(replyHdr.Type).To(Equal(protocol.PacketTypeRetry))
Expect(replyHdr.SrcConnectionID).ToNot(Equal(hdr.DestConnectionID))
Expect(replyHdr.DestConnectionID).To(Equal(hdr.SrcConnectionID))
Expect(replyHdr.Token).ToNot(BeEmpty())
Expect(b[len(b)-16:]).To(Equal(handshake.GetRetryIntegrityTag(b[:len(b)-16], hdr.DestConnectionID)[:]))
return len(b), nil
})
serv.handlePacket(packet)
Eventually(done).Should(BeClosed())
})
It("sends an INVALID_TOKEN error, if an invalid retry token is received", func() {
serv.config.AcceptToken = func(_ net.Addr, _ *Token) bool { return false }
token, err := serv.tokenGenerator.NewRetryToken(&net.UDPAddr{}, nil, nil)
Expect(err).ToNot(HaveOccurred())
hdr := &wire.Header{
IsLongHeader: true,
Type: protocol.PacketTypeInitial,
SrcConnectionID: protocol.ConnectionID{5, 4, 3, 2, 1},
DestConnectionID: protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8, 9, 10},
Token: token,
Version: protocol.VersionTLS,
}
packet := getPacket(hdr, make([]byte, protocol.MinInitialPacketSize))
packet.data = append(packet.data, []byte("coalesced packet")...) // add some garbage to simulate a coalesced packet
raddr := &net.UDPAddr{IP: net.IPv4(127, 0, 0, 1), Port: 1337}
packet.remoteAddr = raddr
tracer.EXPECT().SentPacket(packet.remoteAddr, gomock.Any(), gomock.Any(), gomock.Any()).Do(func(_ net.Addr, replyHdr *logging.Header, _ logging.ByteCount, frames []logging.Frame) {
Expect(replyHdr.Type).To(Equal(protocol.PacketTypeInitial))
Expect(replyHdr.SrcConnectionID).To(Equal(hdr.DestConnectionID))
Expect(replyHdr.DestConnectionID).To(Equal(hdr.SrcConnectionID))
Expect(frames).To(HaveLen(1))
Expect(frames[0]).To(BeAssignableToTypeOf(&wire.ConnectionCloseFrame{}))
ccf := frames[0].(*logging.ConnectionCloseFrame)
Expect(ccf.IsApplicationError).To(BeFalse())
Expect(ccf.ErrorCode).To(Equal(qerr.InvalidToken))
})
done := make(chan struct{})
conn.EXPECT().WriteTo(gomock.Any(), raddr).DoAndReturn(func(b []byte, _ net.Addr) (int, error) {
defer close(done)
replyHdr := parseHeader(b)
Expect(replyHdr.Type).To(Equal(protocol.PacketTypeInitial))
Expect(replyHdr.SrcConnectionID).To(Equal(hdr.DestConnectionID))
Expect(replyHdr.DestConnectionID).To(Equal(hdr.SrcConnectionID))
_, opener := handshake.NewInitialAEAD(hdr.DestConnectionID, protocol.PerspectiveClient)
extHdr, err := unpackHeader(opener, replyHdr, b, hdr.Version)
Expect(err).ToNot(HaveOccurred())
data, err := opener.Open(nil, b[extHdr.ParsedLen():], extHdr.PacketNumber, b[:extHdr.ParsedLen()])
Expect(err).ToNot(HaveOccurred())
f, err := wire.NewFrameParser(hdr.Version).ParseNext(bytes.NewReader(data), protocol.EncryptionInitial)
Expect(err).ToNot(HaveOccurred())
Expect(f).To(BeAssignableToTypeOf(&wire.ConnectionCloseFrame{}))
ccf := f.(*wire.ConnectionCloseFrame)
Expect(ccf.ErrorCode).To(Equal(qerr.InvalidToken))
Expect(ccf.ReasonPhrase).To(BeEmpty())
return len(b), nil
})
serv.handlePacket(packet)
Eventually(done).Should(BeClosed())
})
It("doesn't send an INVALID_TOKEN error, if the packet is corrupted", func() {
serv.config.AcceptToken = func(_ net.Addr, _ *Token) bool { return false }
token, err := serv.tokenGenerator.NewRetryToken(&net.UDPAddr{}, nil, nil)
Expect(err).ToNot(HaveOccurred())
hdr := &wire.Header{
IsLongHeader: true,
Type: protocol.PacketTypeInitial,
SrcConnectionID: protocol.ConnectionID{5, 4, 3, 2, 1},
DestConnectionID: protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8, 9, 10},
Token: token,
Version: protocol.VersionTLS,
}
packet := getPacket(hdr, make([]byte, protocol.MinInitialPacketSize))
packet.data[len(packet.data)-10] ^= 0xff // corrupt the packet
packet.remoteAddr = &net.UDPAddr{IP: net.IPv4(127, 0, 0, 1), Port: 1337}
tracer.EXPECT().DroppedPacket(packet.remoteAddr, logging.PacketTypeInitial, packet.Size(), logging.PacketDropPayloadDecryptError)
serv.handlePacket(packet)
// make sure there are no Write calls on the packet conn
time.Sleep(50 * time.Millisecond)
})
It("creates a session, if no Token is required", func() {
serv.config.AcceptToken = func(_ net.Addr, _ *Token) bool { return true }
hdr := &wire.Header{
IsLongHeader: true,
Type: protocol.PacketTypeInitial,
SrcConnectionID: protocol.ConnectionID{5, 4, 3, 2, 1},
DestConnectionID: protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8, 9, 10},
Version: protocol.VersionTLS,
}
p := getPacket(hdr, make([]byte, protocol.MinInitialPacketSize))
run := make(chan struct{})
var token protocol.StatelessResetToken
rand.Read(token[:])
var newConnID protocol.ConnectionID
phm.EXPECT().AddWithConnID(protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}, gomock.Any(), gomock.Any()).DoAndReturn(func(_, c protocol.ConnectionID, fn func() packetHandler) bool {
newConnID = c
phm.EXPECT().GetStatelessResetToken(gomock.Any()).DoAndReturn(func(c protocol.ConnectionID) protocol.StatelessResetToken {
newConnID = c
return token
})
fn()
return true
})
tracer.EXPECT().TracerForConnection(protocol.PerspectiveServer, protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8, 9, 10})
sess := NewMockQuicSession(mockCtrl)
serv.newSession = func(
_ sendConn,
_ sessionRunner,
origDestConnID protocol.ConnectionID,
retrySrcConnID *protocol.ConnectionID,
clientDestConnID protocol.ConnectionID,
destConnID protocol.ConnectionID,
srcConnID protocol.ConnectionID,
tokenP protocol.StatelessResetToken,
_ *Config,
_ *tls.Config,
_ *handshake.TokenGenerator,
enable0RTT bool,
_ logging.ConnectionTracer,
_ utils.Logger,
_ protocol.VersionNumber,
) quicSession {
Expect(enable0RTT).To(BeFalse())
Expect(origDestConnID).To(Equal(hdr.DestConnectionID))
Expect(retrySrcConnID).To(BeNil())
Expect(clientDestConnID).To(Equal(hdr.DestConnectionID))
Expect(destConnID).To(Equal(hdr.SrcConnectionID))
// make sure we're using a server-generated connection ID
Expect(srcConnID).ToNot(Equal(hdr.DestConnectionID))
Expect(srcConnID).ToNot(Equal(hdr.SrcConnectionID))
Expect(srcConnID).To(Equal(newConnID))
Expect(tokenP).To(Equal(token))
sess.EXPECT().handlePacket(p)
sess.EXPECT().run().Do(func() { close(run) })
sess.EXPECT().Context().Return(context.Background())
sess.EXPECT().HandshakeComplete().Return(context.Background())
return sess
}
done := make(chan struct{})
go func() {
defer GinkgoRecover()
serv.handlePacket(p)
// the Handshake packet is written by the session
// make sure there are no Write calls on the packet conn
time.Sleep(50 * time.Millisecond)
close(done)
}()
// make sure we're using a server-generated connection ID
Eventually(run).Should(BeClosed())
Eventually(done).Should(BeClosed())
})
It("passes queued 0-RTT packets to the session", func() {
serv.config.AcceptToken = func(_ net.Addr, _ *Token) bool { return true }
var createdSession bool
sess := NewMockQuicSession(mockCtrl)
connID := protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8, 9}
initialPacket := getInitial(connID)
zeroRTTPacket := getPacket(&wire.Header{
IsLongHeader: true,
Type: protocol.PacketType0RTT,
SrcConnectionID: protocol.ConnectionID{5, 4, 3, 2, 1},
DestConnectionID: connID,
Version: protocol.VersionTLS,
}, []byte("foobar"))
sess.EXPECT().Context().Return(context.Background()).MaxTimes(1)
sess.EXPECT().HandshakeComplete().Return(context.Background()).MaxTimes(1)
sess.EXPECT().run().MaxTimes(1)
gomock.InOrder(
sess.EXPECT().handlePacket(initialPacket),
sess.EXPECT().handlePacket(zeroRTTPacket),
)
serv.newSession = func(
_ sendConn,
runner sessionRunner,
_ protocol.ConnectionID,
_ *protocol.ConnectionID,
_ protocol.ConnectionID,
_ protocol.ConnectionID,
_ protocol.ConnectionID,
_ protocol.StatelessResetToken,
_ *Config,
_ *tls.Config,
_ *handshake.TokenGenerator,
_ bool,
_ logging.ConnectionTracer,
_ utils.Logger,
_ protocol.VersionNumber,
) quicSession {
createdSession = true
return sess
}
// Receive the 0-RTT packet first.
Expect(serv.handlePacketImpl(zeroRTTPacket)).To(BeTrue())
// Then receive the Initial packet.
phm.EXPECT().GetStatelessResetToken(gomock.Any())
phm.EXPECT().AddWithConnID(gomock.Any(), gomock.Any(), gomock.Any()).DoAndReturn(func(_, _ protocol.ConnectionID, fn func() packetHandler) bool {
fn()
return true
})
tracer.EXPECT().TracerForConnection(protocol.PerspectiveServer, gomock.Any())
Expect(serv.handlePacketImpl(initialPacket)).To(BeTrue())
Expect(createdSession).To(BeTrue())
})
It("drops packets if the receive queue is full", func() {
phm.EXPECT().AddWithConnID(gomock.Any(), gomock.Any(), gomock.Any()).DoAndReturn(func(_, _ protocol.ConnectionID, fn func() packetHandler) bool {
phm.EXPECT().GetStatelessResetToken(gomock.Any())
fn()
return true
}).AnyTimes()
tracer.EXPECT().TracerForConnection(protocol.PerspectiveServer, gomock.Any()).AnyTimes()
serv.config.AcceptToken = func(net.Addr, *Token) bool { return true }
acceptSession := make(chan struct{})
var counter uint32 // to be used as an atomic, so we query it in Eventually
serv.newSession = func(
_ sendConn,
runner sessionRunner,
_ protocol.ConnectionID,
_ *protocol.ConnectionID,
_ protocol.ConnectionID,
_ protocol.ConnectionID,
_ protocol.ConnectionID,
_ protocol.StatelessResetToken,
_ *Config,
_ *tls.Config,
_ *handshake.TokenGenerator,
_ bool,
_ logging.ConnectionTracer,
_ utils.Logger,
_ protocol.VersionNumber,
) quicSession {
<-acceptSession
atomic.AddUint32(&counter, 1)
sess := NewMockQuicSession(mockCtrl)
sess.EXPECT().handlePacket(gomock.Any()).MaxTimes(1)
sess.EXPECT().run().MaxTimes(1)
sess.EXPECT().Context().Return(context.Background()).MaxTimes(1)
sess.EXPECT().HandshakeComplete().Return(context.Background()).MaxTimes(1)
return sess
}
p := getInitial(protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8})
serv.handlePacket(p)
tracer.EXPECT().DroppedPacket(p.remoteAddr, logging.PacketTypeNotDetermined, p.Size(), logging.PacketDropDOSPrevention).MinTimes(1)
var wg sync.WaitGroup
for i := 0; i < 3*protocol.MaxServerUnprocessedPackets; i++ {
wg.Add(1)
go func() {
defer GinkgoRecover()
defer wg.Done()
serv.handlePacket(getInitial(protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8}))
}()
}
wg.Wait()
close(acceptSession)
Eventually(
func() uint32 { return atomic.LoadUint32(&counter) },
scaleDuration(100*time.Millisecond),
).Should(BeEquivalentTo(protocol.MaxServerUnprocessedPackets + 1))
Consistently(func() uint32 { return atomic.LoadUint32(&counter) }).Should(BeEquivalentTo(protocol.MaxServerUnprocessedPackets + 1))
})
It("only creates a single session for a duplicate Initial", func() {
serv.config.AcceptToken = func(_ net.Addr, _ *Token) bool { return true }
var createdSession bool
sess := NewMockQuicSession(mockCtrl)
serv.newSession = func(
_ sendConn,
runner sessionRunner,
_ protocol.ConnectionID,
_ *protocol.ConnectionID,
_ protocol.ConnectionID,
_ protocol.ConnectionID,
_ protocol.ConnectionID,
_ protocol.StatelessResetToken,
_ *Config,
_ *tls.Config,
_ *handshake.TokenGenerator,
_ bool,
_ logging.ConnectionTracer,
_ utils.Logger,
_ protocol.VersionNumber,
) quicSession {
createdSession = true
return sess
}
p := getInitial(protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8, 9})
phm.EXPECT().AddWithConnID(protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8, 9}, gomock.Any(), gomock.Any()).Return(false)
Expect(serv.handlePacketImpl(p)).To(BeTrue())
Expect(createdSession).To(BeFalse())
})
It("rejects new connection attempts if the accept queue is full", func() {
serv.config.AcceptToken = func(_ net.Addr, _ *Token) bool { return true }
serv.newSession = func(
_ sendConn,
runner sessionRunner,
_ protocol.ConnectionID,
_ *protocol.ConnectionID,
_ protocol.ConnectionID,
_ protocol.ConnectionID,
_ protocol.ConnectionID,
_ protocol.StatelessResetToken,
_ *Config,
_ *tls.Config,
_ *handshake.TokenGenerator,
_ bool,
_ logging.ConnectionTracer,
_ utils.Logger,
_ protocol.VersionNumber,
) quicSession {
sess := NewMockQuicSession(mockCtrl)
sess.EXPECT().handlePacket(gomock.Any())
sess.EXPECT().run()
sess.EXPECT().Context().Return(context.Background())
ctx, cancel := context.WithCancel(context.Background())
cancel()
sess.EXPECT().HandshakeComplete().Return(ctx)
return sess
}
phm.EXPECT().AddWithConnID(gomock.Any(), gomock.Any(), gomock.Any()).DoAndReturn(func(_, _ protocol.ConnectionID, fn func() packetHandler) bool {
phm.EXPECT().GetStatelessResetToken(gomock.Any())
fn()
return true
}).Times(protocol.MaxAcceptQueueSize)
tracer.EXPECT().TracerForConnection(protocol.PerspectiveServer, gomock.Any()).Times(protocol.MaxAcceptQueueSize)
var wg sync.WaitGroup
wg.Add(protocol.MaxAcceptQueueSize)
for i := 0; i < protocol.MaxAcceptQueueSize; i++ {
go func() {
defer GinkgoRecover()
defer wg.Done()
serv.handlePacket(getInitialWithRandomDestConnID())
// make sure there are no Write calls on the packet conn
time.Sleep(50 * time.Millisecond)
}()
}
wg.Wait()
p := getInitialWithRandomDestConnID()
hdr, _, _, err := wire.ParsePacket(p.data, 0)
Expect(err).ToNot(HaveOccurred())
tracer.EXPECT().SentPacket(gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any())
done := make(chan struct{})
conn.EXPECT().WriteTo(gomock.Any(), p.remoteAddr).DoAndReturn(func(b []byte, _ net.Addr) (int, error) {
defer close(done)
rejectHdr := parseHeader(b)
Expect(rejectHdr.Type).To(Equal(protocol.PacketTypeInitial))
Expect(rejectHdr.Version).To(Equal(hdr.Version))
Expect(rejectHdr.DestConnectionID).To(Equal(hdr.SrcConnectionID))
Expect(rejectHdr.SrcConnectionID).To(Equal(hdr.DestConnectionID))
return len(b), nil
})
serv.handlePacket(p)
Eventually(done).Should(BeClosed())
})
It("doesn't accept new sessions if they were closed in the mean time", func() {
serv.config.AcceptToken = func(_ net.Addr, _ *Token) bool { return true }
p := getInitial(protocol.ConnectionID{1, 2, 3, 4, 5, 6, 7, 8, 9, 10})
ctx, cancel := context.WithCancel(context.Background())
sessionCreated := make(chan struct{})
sess := NewMockQuicSession(mockCtrl)
serv.newSession = func(
_ sendConn,
runner sessionRunner,
_ protocol.ConnectionID,
_ *protocol.ConnectionID,
_ protocol.ConnectionID,
_ protocol.ConnectionID,
_ protocol.ConnectionID,
_ protocol.StatelessResetToken,
_ *Config,
_ *tls.Config,
_ *handshake.TokenGenerator,
_ bool,
_ logging.ConnectionTracer,
_ utils.Logger,
_ protocol.VersionNumber,
) quicSession {
sess.EXPECT().handlePacket(p)
sess.EXPECT().run()
sess.EXPECT().Context().Return(ctx)
ctx, cancel := context.WithCancel(context.Background())
cancel()
sess.EXPECT().HandshakeComplete().Return(ctx)
close(sessionCreated)
return sess
}
phm.EXPECT().AddWithConnID(gomock.Any(), gomock.Any(), gomock.Any()).DoAndReturn(func(_, _ protocol.ConnectionID, fn func() packetHandler) bool {
phm.EXPECT().GetStatelessResetToken(gomock.Any())
fn()
return true
})
tracer.EXPECT().TracerForConnection(protocol.PerspectiveServer, gomock.Any())
serv.handlePacket(p)
// make sure there are no Write calls on the packet conn
time.Sleep(50 * time.Millisecond)
Eventually(sessionCreated).Should(BeClosed())
cancel()
time.Sleep(scaleDuration(200 * time.Millisecond))
done := make(chan struct{})
go func() {
defer GinkgoRecover()
serv.Accept(context.Background())
close(done)
}()
Consistently(done).ShouldNot(BeClosed())
// make the go routine return
phm.EXPECT().CloseServer()
sess.EXPECT().getPerspective().MaxTimes(2) // once for every conn ID
Expect(serv.Close()).To(Succeed())
Eventually(done).Should(BeClosed())
})
})
Context("accepting sessions", func() {
It("returns Accept when an error occurs", func() {
testErr := errors.New("test err")
done := make(chan struct{})
go func() {
defer GinkgoRecover()
_, err := serv.Accept(context.Background())
Expect(err).To(MatchError(testErr))
close(done)
}()
serv.setCloseError(testErr)
Eventually(done).Should(BeClosed())
})
It("returns immediately, if an error occurred before", func() {
testErr := errors.New("test err")
serv.setCloseError(testErr)
for i := 0; i < 3; i++ {
_, err := serv.Accept(context.Background())
Expect(err).To(MatchError(testErr))
}
})
It("returns when the context is canceled", func() {
ctx, cancel := context.WithCancel(context.Background())
done := make(chan struct{})
go func() {
defer GinkgoRecover()
_, err := serv.Accept(ctx)
Expect(err).To(MatchError("context canceled"))
close(done)
}()
Consistently(done).ShouldNot(BeClosed())
cancel()
Eventually(done).Should(BeClosed())
})
It("accepts new sessions when the handshake completes", func() {
sess := NewMockQuicSession(mockCtrl)
done := make(chan struct{})
go func() {
defer GinkgoRecover()
s, err := serv.Accept(context.Background())
Expect(err).ToNot(HaveOccurred())
Expect(s).To(Equal(sess))
close(done)
}()
ctx, cancel := context.WithCancel(context.Background()) // handshake context
serv.newSession = func(
_ sendConn,
runner sessionRunner,
_ protocol.ConnectionID,
_ *protocol.ConnectionID,
_ protocol.ConnectionID,
_ protocol.ConnectionID,
_ protocol.ConnectionID,
_ protocol.StatelessResetToken,
_ *Config,
_ *tls.Config,
_ *handshake.TokenGenerator,
_ bool,
_ logging.ConnectionTracer,
_ utils.Logger,
_ protocol.VersionNumber,
) quicSession {
sess.EXPECT().HandshakeComplete().Return(ctx)
sess.EXPECT().run().Do(func() {})
sess.EXPECT().Context().Return(context.Background())
return sess
}
phm.EXPECT().AddWithConnID(gomock.Any(), gomock.Any(), gomock.Any()).DoAndReturn(func(_, _ protocol.ConnectionID, fn func() packetHandler) bool {
phm.EXPECT().GetStatelessResetToken(gomock.Any())
fn()
return true
})
tracer.EXPECT().TracerForConnection(protocol.PerspectiveServer, gomock.Any())
serv.createNewSession(&net.UDPAddr{}, nil, nil, nil, nil, nil, protocol.VersionWhatever)
Consistently(done).ShouldNot(BeClosed())
cancel() // complete the handshake
Eventually(done).Should(BeClosed())
})
})
})