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server_test.go
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package quic
import (
"context"
"crypto/rand"
"crypto/tls"
"errors"
"net"
"sync"
"sync/atomic"
"time"
"golang.org/x/time/rate"
"github.com/nxenon/h3spacex/internal/handshake"
mocklogging "github.com/nxenon/h3spacex/internal/mocks/logging"
"github.com/nxenon/h3spacex/internal/protocol"
"github.com/nxenon/h3spacex/internal/qerr"
"github.com/nxenon/h3spacex/internal/testdata"
"github.com/nxenon/h3spacex/internal/utils"
"github.com/nxenon/h3spacex/internal/wire"
"github.com/nxenon/h3spacex/logging"
. "github.com/onsi/ginkgo/v2"
. "github.com/onsi/gomega"
"go.uber.org/mock/gomock"
)
var _ = Describe("Server", func() {
var (
conn *MockPacketConn
tlsConf *tls.Config
)
getPacket := func(hdr *wire.Header, p []byte) receivedPacket {
buf := getPacketBuffer()
hdr.Length = 4 + protocol.ByteCount(len(p)) + 16
var err error
buf.Data, err = (&wire.ExtendedHeader{
Header: *hdr,
PacketNumber: 0x42,
PacketNumberLen: protocol.PacketNumberLen4,
}).Append(buf.Data, protocol.Version1)
Expect(err).ToNot(HaveOccurred())
n := len(buf.Data)
buf.Data = append(buf.Data, p...)
data := buf.Data
sealer, _ := handshake.NewInitialAEAD(hdr.DestConnectionID, protocol.PerspectiveClient, hdr.Version)
_ = 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{
rcvTime: time.Now(),
remoteAddr: &net.UDPAddr{IP: net.IPv4(4, 5, 6, 7), Port: 456},
data: data,
buffer: buf,
}
}
getInitial := func(destConnID protocol.ConnectionID) receivedPacket {
senderAddr := &net.UDPAddr{IP: net.IPv4(1, 2, 3, 4), Port: 42}
hdr := &wire.Header{
Type: protocol.PacketTypeInitial,
SrcConnectionID: protocol.ParseConnectionID([]byte{5, 4, 3, 2, 1}),
DestConnectionID: destConnID,
Version: protocol.Version1,
}
p := getPacket(hdr, make([]byte, protocol.MinInitialPacketSize))
p.buffer = getPacketBuffer()
p.remoteAddr = senderAddr
return p
}
getInitialWithRandomDestConnID := func() receivedPacket {
b := make([]byte, 10)
_, err := rand.Read(b)
Expect(err).ToNot(HaveOccurred())
return getInitial(protocol.ParseConnectionID(b))
}
parseHeader := func(data []byte) *wire.Header {
hdr, _, _, err := wire.ParsePacket(data)
Expect(err).ToNot(HaveOccurred())
return hdr
}
checkConnectionCloseError := func(b []byte, origHdr *wire.Header, errorCode qerr.TransportErrorCode) {
replyHdr := parseHeader(b)
Expect(replyHdr.Type).To(Equal(protocol.PacketTypeInitial))
Expect(replyHdr.SrcConnectionID).To(Equal(origHdr.DestConnectionID))
Expect(replyHdr.DestConnectionID).To(Equal(origHdr.SrcConnectionID))
_, opener := handshake.NewInitialAEAD(origHdr.DestConnectionID, protocol.PerspectiveClient, replyHdr.Version)
extHdr, err := unpackLongHeader(opener, replyHdr, b, origHdr.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(false).ParseNext(data, protocol.EncryptionInitial, origHdr.Version)
Expect(err).ToNot(HaveOccurred())
Expect(f).To(BeAssignableToTypeOf(&wire.ConnectionCloseFrame{}))
ccf := f.(*wire.ConnectionCloseFrame)
Expect(ccf.IsApplicationError).To(BeFalse())
Expect(ccf.ErrorCode).To(BeEquivalentTo(errorCode))
Expect(ccf.ReasonPhrase).To(BeEmpty())
}
BeforeEach(func() {
conn = NewMockPacketConn(mockCtrl)
conn.EXPECT().LocalAddr().Return(&net.UDPAddr{}).AnyTimes()
wait := make(chan struct{})
conn.EXPECT().ReadFrom(gomock.Any()).DoAndReturn(func(_ []byte) (int, net.Addr, error) {
<-wait
return 0, nil, errors.New("done")
}).MaxTimes(1)
conn.EXPECT().SetReadDeadline(gomock.Any()).Do(func(time.Time) error {
close(wait)
conn.EXPECT().SetReadDeadline(time.Time{})
return nil
}).MaxTimes(1)
tlsConf = testdata.GetTLSConfig()
tlsConf.NextProtos = []string{"proto1"}
})
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.Version(0x1234)
_, err := Listen(nil, tlsConf, &Config{Versions: []protocol.Version{version}})
Expect(err).To(MatchError("invalid QUIC version: 0x1234"))
})
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.HandshakeIdleTimeout).To(Equal(protocol.DefaultHandshakeIdleTimeout))
Expect(server.config.MaxIdleTimeout).To(Equal(protocol.DefaultIdleTimeout))
Expect(server.config.KeepAlivePeriod).To(BeZero())
// stop the listener
Expect(ln.Close()).To(Succeed())
})
It("setups with the right values", func() {
supportedVersions := []protocol.Version{protocol.Version1}
config := Config{
Versions: supportedVersions,
HandshakeIdleTimeout: 1337 * time.Hour,
MaxIdleTimeout: 42 * time.Minute,
KeepAlivePeriod: 5 * time.Second,
}
ln, err := Listen(conn, tlsConf, &config)
Expect(err).ToNot(HaveOccurred())
server := ln.baseServer
Expect(server.connHandler).ToNot(BeNil())
Expect(server.config.Versions).To(Equal(supportedVersions))
Expect(server.config.HandshakeIdleTimeout).To(Equal(1337 * time.Hour))
Expect(server.config.MaxIdleTimeout).To(Equal(42 * time.Minute))
Expect(server.config.KeepAlivePeriod).To(Equal(5 * time.Second))
// 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 connections that completed the handshake", func() {
var (
tr *Transport
serv *baseServer
phm *MockPacketHandlerManager
tracer *mocklogging.MockTracer
)
BeforeEach(func() {
var t *logging.Tracer
t, tracer = mocklogging.NewMockTracer(mockCtrl)
tr = &Transport{Conn: conn, Tracer: t}
ln, err := tr.Listen(tlsConf, nil)
Expect(err).ToNot(HaveOccurred())
serv = ln.baseServer
phm = NewMockPacketHandlerManager(mockCtrl)
serv.connHandler = phm
})
AfterEach(func() {
tracer.EXPECT().Close()
tr.Close()
})
Context("handling packets", func() {
It("drops Initial packets with a too short connection ID", func() {
p := getPacket(&wire.Header{
Type: protocol.PacketTypeInitial,
DestConnectionID: protocol.ParseConnectionID([]byte{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{
Type: protocol.PacketTypeInitial,
DestConnectionID: protocol.ParseConnectionID([]byte{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{
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("passes packets to existing connections", func() {
connID := protocol.ParseConnectionID([]byte{1, 2, 3, 4, 5, 6, 7, 8})
p := getPacket(&wire.Header{
Type: protocol.PacketTypeInitial,
DestConnectionID: connID,
Version: serv.config.Versions[0],
}, make([]byte, protocol.MinInitialPacketSize))
conn := NewMockPacketHandler(mockCtrl)
phm.EXPECT().Get(connID).Return(conn, true)
handled := make(chan struct{})
conn.EXPECT().handlePacket(p).Do(func(receivedPacket) { close(handled) })
serv.handlePacket(p)
Eventually(handled).Should(BeClosed())
})
It("creates a connection when the token is accepted", func() {
serv.verifySourceAddress = func(net.Addr) bool { return true }
raddr := &net.UDPAddr{IP: net.IPv4(127, 0, 0, 1), Port: 1337}
retryToken, err := serv.tokenGenerator.NewRetryToken(
raddr,
protocol.ParseConnectionID([]byte{0xde, 0xad, 0xc0, 0xde}),
protocol.ParseConnectionID([]byte{0xde, 0xca, 0xfb, 0xad}),
)
Expect(err).ToNot(HaveOccurred())
connID := protocol.ParseConnectionID([]byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10})
hdr := &wire.Header{
Type: protocol.PacketTypeInitial,
SrcConnectionID: protocol.ParseConnectionID([]byte{5, 4, 3, 2, 1}),
DestConnectionID: connID,
Version: protocol.Version1,
Token: retryToken,
}
p := getPacket(hdr, make([]byte, protocol.MinInitialPacketSize))
p.remoteAddr = raddr
run := make(chan struct{})
var token protocol.StatelessResetToken
rand.Read(token[:])
var newConnID protocol.ConnectionID
conn := NewMockQUICConn(mockCtrl)
serv.newConn = func(
_ sendConn,
_ connRunner,
origDestConnID protocol.ConnectionID,
retrySrcConnID *protocol.ConnectionID,
clientDestConnID protocol.ConnectionID,
destConnID protocol.ConnectionID,
srcConnID protocol.ConnectionID,
_ ConnectionIDGenerator,
tokenP protocol.StatelessResetToken,
_ *Config,
_ *tls.Config,
_ *handshake.TokenGenerator,
_ bool,
_ *logging.ConnectionTracer,
_ uint64,
_ utils.Logger,
_ protocol.Version,
) quicConn {
Expect(origDestConnID).To(Equal(protocol.ParseConnectionID([]byte{0xde, 0xad, 0xc0, 0xde})))
Expect(*retrySrcConnID).To(Equal(protocol.ParseConnectionID([]byte{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))
newConnID = srcConnID
Expect(tokenP).To(Equal(token))
conn.EXPECT().handlePacket(p)
conn.EXPECT().run().Do(func() error { close(run); return nil })
conn.EXPECT().Context().Return(context.Background())
conn.EXPECT().HandshakeComplete().Return(make(chan struct{}))
return conn
}
phm.EXPECT().Get(connID)
phm.EXPECT().GetStatelessResetToken(gomock.Any()).Return(token)
phm.EXPECT().AddWithConnID(connID, gomock.Any(), gomock.Any()).DoAndReturn(func(_, cid protocol.ConnectionID, h packetHandler) bool {
Expect(cid).To(Equal(newConnID))
return true
})
done := make(chan struct{})
go func() {
defer GinkgoRecover()
serv.handlePacket(p)
// the Handshake packet is written by the connection.
// 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())
// shutdown
conn.EXPECT().closeWithTransportError(gomock.Any())
})
It("sends a Version Negotiation Packet for unsupported versions", func() {
srcConnID := protocol.ParseConnectionID([]byte{1, 2, 3, 4, 5})
destConnID := protocol.ParseConnectionID([]byte{1, 2, 3, 4, 5, 6})
packet := getPacket(&wire.Header{
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().SentVersionNegotiationPacket(packet.remoteAddr, gomock.Any(), gomock.Any(), gomock.Any()).Do(func(_ net.Addr, src, dest protocol.ArbitraryLenConnectionID, _ []protocol.Version) {
Expect(src).To(Equal(protocol.ArbitraryLenConnectionID(destConnID.Bytes())))
Expect(dest).To(Equal(protocol.ArbitraryLenConnectionID(srcConnID.Bytes())))
})
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())
dest, src, versions, err := wire.ParseVersionNegotiationPacket(b)
Expect(err).ToNot(HaveOccurred())
Expect(dest).To(Equal(protocol.ArbitraryLenConnectionID(srcConnID.Bytes())))
Expect(src).To(Equal(protocol.ArbitraryLenConnectionID(destConnID.Bytes())))
Expect(versions).ToNot(ContainElement(protocol.Version(0x42)))
return len(b), nil
})
serv.handlePacket(packet)
Eventually(done).Should(BeClosed())
})
It("doesn't send a Version Negotiation packets if sending them is disabled", func() {
serv.disableVersionNegotiation = true
srcConnID := protocol.ParseConnectionID([]byte{1, 2, 3, 4, 5})
destConnID := protocol.ParseConnectionID([]byte{1, 2, 3, 4, 5, 6})
packet := getPacket(&wire.Header{
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
done := make(chan struct{})
serv.handlePacket(packet)
Consistently(done, 50*time.Millisecond).ShouldNot(BeClosed())
})
It("ignores Version Negotiation packets", func() {
data := wire.ComposeVersionNegotiation(
protocol.ArbitraryLenConnectionID{1, 2, 3, 4},
protocol.ArbitraryLenConnectionID{4, 3, 2, 1},
[]protocol.Version{1, 2, 3},
)
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.ParseConnectionID([]byte{1, 2, 3, 4, 5})
destConnID := protocol.ParseConnectionID([]byte{1, 2, 3, 4, 5, 6})
p := getPacket(&wire.Header{
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() {
connID := protocol.ParseConnectionID([]byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10})
raddr := &net.UDPAddr{IP: net.IPv4(127, 0, 0, 1), Port: 1337}
var called bool
serv.verifySourceAddress = func(addr net.Addr) bool {
Expect(addr).To(Equal(raddr))
called = true
return true
}
hdr := &wire.Header{
Type: protocol.PacketTypeInitial,
SrcConnectionID: protocol.ParseConnectionID([]byte{5, 4, 3, 2, 1}),
DestConnectionID: connID,
Version: protocol.Version1,
}
packet := getPacket(hdr, make([]byte, protocol.MinInitialPacketSize))
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, hdr.Version)[:]))
return len(b), nil
})
phm.EXPECT().Get(connID)
serv.handlePacket(packet)
Eventually(done).Should(BeClosed())
Expect(called).To(BeTrue())
})
It("creates a connection, if no token is required", func() {
connID := protocol.ParseConnectionID([]byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10})
hdr := &wire.Header{
Type: protocol.PacketTypeInitial,
SrcConnectionID: protocol.ParseConnectionID([]byte{5, 4, 3, 2, 1}),
DestConnectionID: connID,
Version: protocol.Version1,
}
p := getPacket(hdr, make([]byte, protocol.MinInitialPacketSize))
run := make(chan struct{})
var token protocol.StatelessResetToken
rand.Read(token[:])
var newConnID protocol.ConnectionID
conn := NewMockQUICConn(mockCtrl)
serv.newConn = func(
_ sendConn,
_ connRunner,
origDestConnID protocol.ConnectionID,
retrySrcConnID *protocol.ConnectionID,
clientDestConnID protocol.ConnectionID,
destConnID protocol.ConnectionID,
srcConnID protocol.ConnectionID,
_ ConnectionIDGenerator,
tokenP protocol.StatelessResetToken,
_ *Config,
_ *tls.Config,
_ *handshake.TokenGenerator,
_ bool,
_ *logging.ConnectionTracer,
_ uint64,
_ utils.Logger,
_ protocol.Version,
) quicConn {
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))
newConnID = srcConnID
Expect(tokenP).To(Equal(token))
conn.EXPECT().handlePacket(p)
conn.EXPECT().run().Do(func() error { close(run); return nil })
conn.EXPECT().Context().Return(context.Background())
conn.EXPECT().HandshakeComplete().Return(make(chan struct{}))
return conn
}
gomock.InOrder(
phm.EXPECT().Get(connID),
phm.EXPECT().GetStatelessResetToken(gomock.Any()).Return(token),
phm.EXPECT().AddWithConnID(connID, gomock.Any(), gomock.Any()).DoAndReturn(func(_, c protocol.ConnectionID, h packetHandler) bool {
Expect(c).To(Equal(newConnID))
return true
}),
)
done := make(chan struct{})
go func() {
defer GinkgoRecover()
serv.handlePacket(p)
// the Handshake packet is written by the connection
// 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())
// shutdown
conn.EXPECT().closeWithTransportError(gomock.Any()).MaxTimes(1)
})
It("drops packets if the receive queue is full", func() {
serv.verifySourceAddress = func(net.Addr) bool { return false }
phm.EXPECT().Get(gomock.Any()).AnyTimes()
phm.EXPECT().GetStatelessResetToken(gomock.Any()).AnyTimes()
phm.EXPECT().AddWithConnID(gomock.Any(), gomock.Any(), gomock.Any()).Return(true).AnyTimes()
acceptConn := make(chan struct{})
var counter atomic.Uint32
serv.newConn = func(
_ sendConn,
runner connRunner,
_ protocol.ConnectionID,
_ *protocol.ConnectionID,
_ protocol.ConnectionID,
_ protocol.ConnectionID,
_ protocol.ConnectionID,
_ ConnectionIDGenerator,
_ protocol.StatelessResetToken,
_ *Config,
_ *tls.Config,
_ *handshake.TokenGenerator,
_ bool,
_ *logging.ConnectionTracer,
_ uint64,
_ utils.Logger,
_ protocol.Version,
) quicConn {
<-acceptConn
counter.Add(1)
conn := NewMockQUICConn(mockCtrl)
conn.EXPECT().handlePacket(gomock.Any()).MaxTimes(1)
conn.EXPECT().run().MaxTimes(1)
conn.EXPECT().Context().Return(context.Background()).MaxTimes(1)
conn.EXPECT().HandshakeComplete().Return(make(chan struct{})).MaxTimes(1)
// shutdown
conn.EXPECT().closeWithTransportError(gomock.Any()).MaxTimes(1)
return conn
}
p := getInitial(protocol.ParseConnectionID([]byte{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.ParseConnectionID([]byte{1, 2, 3, 4, 5, 6, 7, 8})))
}()
}
wg.Wait()
close(acceptConn)
Eventually(
func() uint32 { return counter.Load() },
scaleDuration(100*time.Millisecond),
).Should(BeEquivalentTo(protocol.MaxServerUnprocessedPackets + 1))
Consistently(func() uint32 { return counter.Load() }).Should(BeEquivalentTo(protocol.MaxServerUnprocessedPackets + 1))
})
It("only creates a single connection for a duplicate Initial", func() {
done := make(chan struct{})
serv.newConn = func(
_ sendConn,
runner connRunner,
_ protocol.ConnectionID,
_ *protocol.ConnectionID,
_ protocol.ConnectionID,
_ protocol.ConnectionID,
_ protocol.ConnectionID,
_ ConnectionIDGenerator,
_ protocol.StatelessResetToken,
_ *Config,
_ *tls.Config,
_ *handshake.TokenGenerator,
_ bool,
_ *logging.ConnectionTracer,
_ uint64,
_ utils.Logger,
_ protocol.Version,
) quicConn {
conn := NewMockQUICConn(mockCtrl)
conn.EXPECT().handlePacket(gomock.Any())
conn.EXPECT().closeWithTransportError(qerr.ConnectionRefused).Do(func(qerr.TransportErrorCode) {
close(done)
})
return conn
}
connID := protocol.ParseConnectionID([]byte{1, 2, 3, 4, 5, 6, 7, 8, 9})
p := getInitial(connID)
phm.EXPECT().Get(connID)
phm.EXPECT().GetStatelessResetToken(gomock.Any())
phm.EXPECT().AddWithConnID(connID, gomock.Any(), gomock.Any()).Return(false) // connection ID collision
Expect(serv.handlePacketImpl(p)).To(BeTrue())
Eventually(done).Should(BeClosed())
})
It("limits the number of unvalidated handshakes", func() {
const limit = 3
limiter := rate.NewLimiter(0, limit)
serv.verifySourceAddress = func(net.Addr) bool { return !limiter.Allow() }
phm.EXPECT().Get(gomock.Any()).AnyTimes()
phm.EXPECT().GetStatelessResetToken(gomock.Any()).AnyTimes()
phm.EXPECT().AddWithConnID(gomock.Any(), gomock.Any(), gomock.Any()).Return(true).AnyTimes()
connChan := make(chan *MockQUICConn, 1)
var wg sync.WaitGroup
wg.Add(limit)
done := make(chan struct{})
serv.newConn = func(
_ sendConn,
runner connRunner,
_ protocol.ConnectionID,
_ *protocol.ConnectionID,
_ protocol.ConnectionID,
_ protocol.ConnectionID,
_ protocol.ConnectionID,
_ ConnectionIDGenerator,
_ protocol.StatelessResetToken,
_ *Config,
_ *tls.Config,
_ *handshake.TokenGenerator,
_ bool,
_ *logging.ConnectionTracer,
_ uint64,
_ utils.Logger,
_ protocol.Version,
) quicConn {
conn := <-connChan
conn.EXPECT().handlePacket(gomock.Any())
conn.EXPECT().run()
conn.EXPECT().Context().Return(context.Background())
conn.EXPECT().HandshakeComplete().DoAndReturn(func() <-chan struct{} { wg.Done(); return done })
return conn
}
// Initiate the maximum number of allowed connection attempts.
for i := 0; i < limit; i++ {
conn := NewMockQUICConn(mockCtrl)
connChan <- conn
serv.handlePacket(getInitialWithRandomDestConnID())
}
// Now initiate another connection attempt.
p := getInitialWithRandomDestConnID()
tracer.EXPECT().SentPacket(p.remoteAddr, gomock.Any(), gomock.Any(), gomock.Any()).Do(func(_ net.Addr, replyHdr *logging.Header, _ logging.ByteCount, frames []logging.Frame) {
defer GinkgoRecover()
Expect(replyHdr.Type).To(Equal(protocol.PacketTypeRetry))
})
conn.EXPECT().WriteTo(gomock.Any(), gomock.Any()).DoAndReturn(func(b []byte, _ net.Addr) (int, error) {
defer GinkgoRecover()
defer close(done)
hdr, _, _, err := wire.ParsePacket(b)
Expect(err).ToNot(HaveOccurred())
Expect(hdr.Type).To(Equal(protocol.PacketTypeRetry))
return len(b), nil
})
serv.handlePacket(p)
Eventually(done).Should(BeClosed())
for i := 0; i < limit; i++ {
_, err := serv.Accept(context.Background())
Expect(err).ToNot(HaveOccurred())
}
wg.Wait()
})
})
Context("token validation", func() {
It("decodes the token from the token field", func() {
serv.newConn = func(
_ sendConn,
_ connRunner,
_ protocol.ConnectionID,
_ *protocol.ConnectionID,
_ protocol.ConnectionID,
_ protocol.ConnectionID,
_ protocol.ConnectionID,
_ ConnectionIDGenerator,
_ protocol.StatelessResetToken,
_ *Config,
_ *tls.Config,
_ *handshake.TokenGenerator,
_ bool,
_ *logging.ConnectionTracer,
_ uint64,
_ utils.Logger,
_ protocol.Version,
) quicConn {
c := NewMockQUICConn(mockCtrl)
c.EXPECT().handlePacket(gomock.Any())
c.EXPECT().run()
c.EXPECT().HandshakeComplete()
ctx, cancel := context.WithCancel(context.Background())
cancel()
c.EXPECT().Context().Return(ctx)
return c
}
raddr := &net.UDPAddr{IP: net.IPv4(192, 168, 13, 37), Port: 1337}
token, err := serv.tokenGenerator.NewRetryToken(raddr, protocol.ConnectionID{}, protocol.ConnectionID{})
Expect(err).ToNot(HaveOccurred())
packet := getPacket(&wire.Header{
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)
done := make(chan struct{})
phm.EXPECT().Get(gomock.Any())
phm.EXPECT().GetStatelessResetToken(gomock.Any())
phm.EXPECT().AddWithConnID(gomock.Any(), gomock.Any(), gomock.Any()).DoAndReturn(func(_, _ protocol.ConnectionID, _ packetHandler) bool {
close(done)
return true
})
phm.EXPECT().Remove(gomock.Any()).AnyTimes()
serv.handlePacket(packet)
Eventually(done).Should(BeClosed())
})
It("sends an INVALID_TOKEN error, if an invalid retry token is received", func() {
serv.verifySourceAddress = func(net.Addr) bool { return true }
token, err := serv.tokenGenerator.NewRetryToken(&net.UDPAddr{}, protocol.ConnectionID{}, protocol.ConnectionID{})
Expect(err).ToNot(HaveOccurred())
hdr := &wire.Header{
Type: protocol.PacketTypeInitial,
SrcConnectionID: protocol.ParseConnectionID([]byte{5, 4, 3, 2, 1}),
DestConnectionID: protocol.ParseConnectionID([]byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}),
Token: token,
Version: protocol.Version1,
}
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(BeEquivalentTo(qerr.InvalidToken))
})
done := make(chan struct{})
conn.EXPECT().WriteTo(gomock.Any(), raddr).DoAndReturn(func(b []byte, _ net.Addr) (int, error) {
defer close(done)
checkConnectionCloseError(b, hdr, qerr.InvalidToken)
return len(b), nil
})
phm.EXPECT().Get(gomock.Any())
serv.handlePacket(packet)
Eventually(done).Should(BeClosed())
})
It("sends an INVALID_TOKEN error, if an expired retry token is received", func() {
serv.verifySourceAddress = func(net.Addr) bool { return true }
serv.config.HandshakeIdleTimeout = time.Millisecond / 2 // the maximum retry token age is equivalent to the handshake timeout
Expect(serv.config.maxRetryTokenAge()).To(Equal(time.Millisecond))
raddr := &net.UDPAddr{IP: net.IPv4(127, 0, 0, 1), Port: 1337}
token, err := serv.tokenGenerator.NewRetryToken(raddr, protocol.ConnectionID{}, protocol.ConnectionID{})
Expect(err).ToNot(HaveOccurred())
time.Sleep(2 * time.Millisecond) // make sure the token is expired
hdr := &wire.Header{
Type: protocol.PacketTypeInitial,
SrcConnectionID: protocol.ParseConnectionID([]byte{5, 4, 3, 2, 1}),
DestConnectionID: protocol.ParseConnectionID([]byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}),
Token: token,
Version: protocol.Version1,
}
packet := getPacket(hdr, make([]byte, protocol.MinInitialPacketSize))
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(BeEquivalentTo(qerr.InvalidToken))
})
done := make(chan struct{})
conn.EXPECT().WriteTo(gomock.Any(), raddr).DoAndReturn(func(b []byte, _ net.Addr) (int, error) {
defer close(done)
checkConnectionCloseError(b, hdr, qerr.InvalidToken)
return len(b), nil
})
phm.EXPECT().Get(gomock.Any())
serv.handlePacket(packet)
Eventually(done).Should(BeClosed())
})
It("doesn't send an INVALID_TOKEN error, if an invalid non-retry token is received", func() {
serv.verifySourceAddress = func(net.Addr) bool { return true }
token, err := serv.tokenGenerator.NewToken(&net.UDPAddr{IP: net.IPv4(192, 168, 0, 1), Port: 1337})
Expect(err).ToNot(HaveOccurred())
hdr := &wire.Header{
Type: protocol.PacketTypeInitial,
SrcConnectionID: protocol.ParseConnectionID([]byte{5, 4, 3, 2, 1}),
DestConnectionID: protocol.ParseConnectionID([]byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}),
Token: token,
Version: protocol.Version1,
}
packet := getPacket(hdr, make([]byte, protocol.MinInitialPacketSize))
packet.data[len(packet.data)-10] ^= 0xff // corrupt the packet
raddr := &net.UDPAddr{IP: net.IPv4(127, 0, 0, 1), Port: 1337}
packet.remoteAddr = raddr
tracer.EXPECT().SentPacket(gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any()).MaxTimes(1)
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))
return len(b), nil
})
phm.EXPECT().Get(gomock.Any())
serv.handlePacket(packet)
// make sure there are no Write calls on the packet conn
Eventually(done).Should(BeClosed())
})
It("sends an INVALID_TOKEN error, if an expired non-retry token is received", func() {
serv.verifySourceAddress = func(net.Addr) bool { return true }
serv.maxTokenAge = time.Millisecond
raddr := &net.UDPAddr{IP: net.IPv4(127, 0, 0, 1), Port: 1337}
token, err := serv.tokenGenerator.NewToken(raddr)
Expect(err).ToNot(HaveOccurred())
time.Sleep(2 * time.Millisecond) // make sure the token is expired
hdr := &wire.Header{
Type: protocol.PacketTypeInitial,
SrcConnectionID: protocol.ParseConnectionID([]byte{5, 4, 3, 2, 1}),
DestConnectionID: protocol.ParseConnectionID([]byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}),
Token: token,
Version: protocol.Version1,
}
packet := getPacket(hdr, make([]byte, protocol.MinInitialPacketSize))
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.PacketTypeRetry))
})
done := make(chan struct{})
conn.EXPECT().WriteTo(gomock.Any(), raddr).DoAndReturn(func(b []byte, _ net.Addr) (int, error) {
defer close(done)
return len(b), nil
})
phm.EXPECT().Get(gomock.Any())
serv.handlePacket(packet)
Eventually(done).Should(BeClosed())
})
It("doesn't send an INVALID_TOKEN error, if the packet is corrupted", func() {
token, err := serv.tokenGenerator.NewRetryToken(&net.UDPAddr{}, protocol.ConnectionID{}, protocol.ConnectionID{})
Expect(err).ToNot(HaveOccurred())
hdr := &wire.Header{
Type: protocol.PacketTypeInitial,
SrcConnectionID: protocol.ParseConnectionID([]byte{5, 4, 3, 2, 1}),
DestConnectionID: protocol.ParseConnectionID([]byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}),
Token: token,
Version: protocol.Version1,
}
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}
done := make(chan struct{})
tracer.EXPECT().DroppedPacket(packet.remoteAddr, logging.PacketTypeInitial, packet.Size(), logging.PacketDropPayloadDecryptError).Do(func(net.Addr, logging.PacketType, protocol.ByteCount, logging.PacketDropReason) { close(done) })
phm.EXPECT().Get(gomock.Any())
serv.handlePacket(packet)
// make sure there are no Write calls on the packet conn
time.Sleep(50 * time.Millisecond)
Eventually(done).Should(BeClosed())
})
})
Context("accepting connections", func() {
It("returns Accept when closed", func() {
done := make(chan struct{})
go func() {
defer GinkgoRecover()
_, err := serv.Accept(context.Background())
Expect(err).To(MatchError(ErrServerClosed))
close(done)
}()
serv.Close()
Eventually(done).Should(BeClosed())
})
It("returns immediately, if an error occurred before", func() {
serv.Close()
for i := 0; i < 3; i++ {
_, err := serv.Accept(context.Background())
Expect(err).To(MatchError(ErrServerClosed))
}
})
PIt("closes connection that are still handshaking after Close", func() {
serv.Close()
destroyed := make(chan struct{})
serv.newConn = func(
_ sendConn,
_ connRunner,
_ protocol.ConnectionID,
_ *protocol.ConnectionID,
_ protocol.ConnectionID,
_ protocol.ConnectionID,
_ protocol.ConnectionID,
_ ConnectionIDGenerator,
_ protocol.StatelessResetToken,
conf *Config,
_ *tls.Config,
_ *handshake.TokenGenerator,
_ bool,
_ *logging.ConnectionTracer,
_ uint64,
_ utils.Logger,
_ protocol.Version,
) quicConn {
conn := NewMockQUICConn(mockCtrl)
conn.EXPECT().handlePacket(gomock.Any())
conn.EXPECT().closeWithTransportError(ConnectionRefused).Do(func(TransportErrorCode) { close(destroyed) })
conn.EXPECT().HandshakeComplete().Return(make(chan struct{}))
conn.EXPECT().run().MaxTimes(1)
conn.EXPECT().Context().Return(context.Background())
return conn
}
phm.EXPECT().Get(gomock.Any())
phm.EXPECT().GetStatelessResetToken(gomock.Any())
phm.EXPECT().AddWithConnID(gomock.Any(), gomock.Any(), gomock.Any()).Return(true)
serv.handleInitialImpl(
receivedPacket{buffer: getPacketBuffer()},
&wire.Header{DestConnectionID: protocol.ParseConnectionID([]byte{1, 2, 3, 4, 5, 6, 7, 8})},
)
Eventually(destroyed).Should(BeClosed())
})
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"))