561 lines
20 KiB
Go
561 lines
20 KiB
Go
package quic
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import (
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"bytes"
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"context"
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"crypto/tls"
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"errors"
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"net"
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"reflect"
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"time"
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"github.com/lucas-clemente/quic-go/internal/crypto"
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"github.com/lucas-clemente/quic-go/internal/handshake"
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"github.com/lucas-clemente/quic-go/internal/protocol"
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"github.com/lucas-clemente/quic-go/internal/testdata"
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"github.com/lucas-clemente/quic-go/internal/utils"
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"github.com/lucas-clemente/quic-go/internal/wire"
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"github.com/lucas-clemente/quic-go/qerr"
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. "github.com/onsi/ginkgo"
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. "github.com/onsi/gomega"
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)
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type mockSession struct {
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connectionID protocol.ConnectionID
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packetCount int
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closed bool
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closeReason error
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closedRemote bool
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stopRunLoop chan struct{} // run returns as soon as this channel receives a value
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handshakeChan chan error
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}
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func (s *mockSession) handlePacket(*receivedPacket) {
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s.packetCount++
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}
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func (s *mockSession) run() error {
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<-s.stopRunLoop
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return s.closeReason
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}
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func (s *mockSession) Close(e error) error {
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if s.closed {
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return nil
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}
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s.closeReason = e
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s.closed = true
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close(s.stopRunLoop)
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return nil
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}
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func (s *mockSession) closeRemote(e error) {
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s.closeReason = e
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s.closed = true
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s.closedRemote = true
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close(s.stopRunLoop)
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}
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func (s *mockSession) OpenStream() (Stream, error) {
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return &stream{}, nil
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}
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func (s *mockSession) AcceptStream() (Stream, error) { panic("not implemented") }
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func (s *mockSession) OpenStreamSync() (Stream, error) { panic("not implemented") }
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func (s *mockSession) LocalAddr() net.Addr { panic("not implemented") }
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func (s *mockSession) RemoteAddr() net.Addr { panic("not implemented") }
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func (*mockSession) Context() context.Context { panic("not implemented") }
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func (*mockSession) ConnectionState() ConnectionState { panic("not implemented") }
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func (*mockSession) GetVersion() protocol.VersionNumber { return protocol.VersionWhatever }
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func (s *mockSession) handshakeStatus() <-chan error { return s.handshakeChan }
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func (*mockSession) getCryptoStream() cryptoStreamI { panic("not implemented") }
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var _ Session = &mockSession{}
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func newMockSession(
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_ connection,
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_ protocol.VersionNumber,
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connectionID protocol.ConnectionID,
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_ *handshake.ServerConfig,
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_ *tls.Config,
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_ *Config,
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) (packetHandler, error) {
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s := mockSession{
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connectionID: connectionID,
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handshakeChan: make(chan error),
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stopRunLoop: make(chan struct{}),
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}
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return &s, nil
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}
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var _ = Describe("Server", func() {
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var (
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conn *mockPacketConn
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config *Config
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udpAddr = &net.UDPAddr{IP: net.IPv4(192, 168, 100, 200), Port: 1337}
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)
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BeforeEach(func() {
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conn = newMockPacketConn()
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conn.addr = &net.UDPAddr{}
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config = &Config{Versions: protocol.SupportedVersions}
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})
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Context("with mock session", func() {
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var (
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serv *server
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firstPacket []byte // a valid first packet for a new connection with connectionID 0x4cfa9f9b668619f6 (= connID)
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connID = protocol.ConnectionID(0x4cfa9f9b668619f6)
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)
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BeforeEach(func() {
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serv = &server{
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sessions: make(map[protocol.ConnectionID]packetHandler),
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newSession: newMockSession,
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conn: conn,
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config: config,
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sessionQueue: make(chan Session, 5),
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errorChan: make(chan struct{}),
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}
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b := &bytes.Buffer{}
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utils.BigEndian.WriteUint32(b, uint32(protocol.SupportedVersions[0]))
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firstPacket = []byte{0x09, 0x4c, 0xfa, 0x9f, 0x9b, 0x66, 0x86, 0x19, 0xf6}
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firstPacket = append(append(firstPacket, b.Bytes()...), 0x01)
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firstPacket = append(firstPacket, bytes.Repeat([]byte{0}, protocol.MinClientHelloSize)...) // add padding
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})
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It("returns the address", func() {
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conn.addr = &net.UDPAddr{
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IP: net.IPv4(192, 168, 13, 37),
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Port: 1234,
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}
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Expect(serv.Addr().String()).To(Equal("192.168.13.37:1234"))
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})
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It("creates new sessions", func() {
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err := serv.handlePacket(nil, nil, firstPacket)
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Expect(err).ToNot(HaveOccurred())
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Expect(serv.sessions).To(HaveLen(1))
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sess := serv.sessions[connID].(*mockSession)
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Expect(sess.connectionID).To(Equal(connID))
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Expect(sess.packetCount).To(Equal(1))
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})
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It("accepts a session once the connection it is forward secure", func(done Done) {
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var acceptedSess Session
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go func() {
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defer GinkgoRecover()
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var err error
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acceptedSess, err = serv.Accept()
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Expect(err).ToNot(HaveOccurred())
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}()
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err := serv.handlePacket(nil, nil, firstPacket)
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Expect(err).ToNot(HaveOccurred())
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Expect(serv.sessions).To(HaveLen(1))
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sess := serv.sessions[connID].(*mockSession)
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Consistently(func() Session { return acceptedSess }).Should(BeNil())
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close(sess.handshakeChan)
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Eventually(func() Session { return acceptedSess }).Should(Equal(sess))
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close(done)
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}, 0.5)
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It("doesn't accept session that error during the handshake", func(done Done) {
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var accepted bool
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go func() {
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defer GinkgoRecover()
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serv.Accept()
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accepted = true
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}()
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err := serv.handlePacket(nil, nil, firstPacket)
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Expect(err).ToNot(HaveOccurred())
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Expect(serv.sessions).To(HaveLen(1))
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sess := serv.sessions[connID].(*mockSession)
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sess.handshakeChan <- errors.New("handshake failed")
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Consistently(func() bool { return accepted }).Should(BeFalse())
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close(done)
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})
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It("assigns packets to existing sessions", func() {
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err := serv.handlePacket(nil, nil, firstPacket)
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Expect(err).ToNot(HaveOccurred())
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err = serv.handlePacket(nil, nil, []byte{0x08, 0x4c, 0xfa, 0x9f, 0x9b, 0x66, 0x86, 0x19, 0xf6, 0x01})
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Expect(err).ToNot(HaveOccurred())
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Expect(serv.sessions).To(HaveLen(1))
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Expect(serv.sessions[connID].(*mockSession).connectionID).To(Equal(connID))
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Expect(serv.sessions[connID].(*mockSession).packetCount).To(Equal(2))
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})
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It("closes and deletes sessions", func() {
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serv.deleteClosedSessionsAfter = time.Second // make sure that the nil value for the closed session doesn't get deleted in this test
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nullAEAD, err := crypto.NewNullAEAD(protocol.PerspectiveServer, connID, protocol.VersionWhatever)
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Expect(err).ToNot(HaveOccurred())
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err = serv.handlePacket(nil, nil, append(firstPacket, nullAEAD.Seal(nil, nil, 0, firstPacket)...))
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Expect(err).ToNot(HaveOccurred())
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Expect(serv.sessions).To(HaveLen(1))
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Expect(serv.sessions[connID]).ToNot(BeNil())
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// make session.run() return
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serv.sessions[connID].(*mockSession).stopRunLoop <- struct{}{}
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// The server should now have closed the session, leaving a nil value in the sessions map
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Consistently(func() map[protocol.ConnectionID]packetHandler { return serv.sessions }).Should(HaveLen(1))
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Expect(serv.sessions[connID]).To(BeNil())
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})
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It("deletes nil session entries after a wait time", func() {
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serv.deleteClosedSessionsAfter = 25 * time.Millisecond
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nullAEAD, err := crypto.NewNullAEAD(protocol.PerspectiveServer, connID, protocol.VersionWhatever)
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Expect(err).ToNot(HaveOccurred())
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err = serv.handlePacket(nil, nil, append(firstPacket, nullAEAD.Seal(nil, nil, 0, firstPacket)...))
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Expect(err).ToNot(HaveOccurred())
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Expect(serv.sessions).To(HaveLen(1))
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Expect(serv.sessions).To(HaveKey(connID))
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// make session.run() return
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serv.sessions[connID].(*mockSession).stopRunLoop <- struct{}{}
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Eventually(func() bool {
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serv.sessionsMutex.Lock()
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_, ok := serv.sessions[connID]
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serv.sessionsMutex.Unlock()
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return ok
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}).Should(BeFalse())
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})
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It("closes sessions and the connection when Close is called", func() {
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go serv.serve()
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session, _ := newMockSession(nil, 0, 0, nil, nil, nil)
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serv.sessions[1] = session
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err := serv.Close()
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Expect(err).NotTo(HaveOccurred())
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Expect(session.(*mockSession).closed).To(BeTrue())
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Expect(conn.closed).To(BeTrue())
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})
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It("ignores packets for closed sessions", func() {
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serv.sessions[connID] = nil
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err := serv.handlePacket(nil, nil, []byte{0x08, 0x4c, 0xfa, 0x9f, 0x9b, 0x66, 0x86, 0x19, 0xf6, 0x01})
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Expect(err).ToNot(HaveOccurred())
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Expect(serv.sessions).To(HaveLen(1))
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Expect(serv.sessions[connID]).To(BeNil())
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})
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It("works if no quic.Config is given", func(done Done) {
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ln, err := ListenAddr("127.0.0.1:0", testdata.GetTLSConfig(), nil)
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Expect(err).ToNot(HaveOccurred())
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Expect(ln.Close()).To(Succeed())
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close(done)
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}, 1)
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It("closes properly", func() {
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ln, err := ListenAddr("127.0.0.1:0", testdata.GetTLSConfig(), config)
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Expect(err).ToNot(HaveOccurred())
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var returned bool
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go func() {
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defer GinkgoRecover()
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_, err := ln.Accept()
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Expect(err).To(HaveOccurred())
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Expect(err.Error()).To(ContainSubstring("use of closed network connection"))
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returned = true
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}()
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ln.Close()
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Eventually(func() bool { return returned }).Should(BeTrue())
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})
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It("errors when encountering a connection error", func(done Done) {
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testErr := errors.New("connection error")
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conn.readErr = testErr
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go serv.serve()
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_, err := serv.Accept()
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Expect(err).To(MatchError(testErr))
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Expect(serv.Close()).To(Succeed())
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close(done)
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}, 0.5)
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It("closes all sessions when encountering a connection error", func() {
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session, _ := newMockSession(nil, 0, 0, nil, nil, nil)
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serv.sessions[0x12345] = session
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Expect(serv.sessions[0x12345].(*mockSession).closed).To(BeFalse())
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testErr := errors.New("connection error")
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conn.readErr = testErr
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go serv.serve()
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Eventually(func() Session { return serv.sessions[connID] }).Should(BeNil())
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Eventually(func() bool { return session.(*mockSession).closed }).Should(BeTrue())
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Expect(serv.Close()).To(Succeed())
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})
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It("ignores delayed packets with mismatching versions", func() {
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err := serv.handlePacket(nil, nil, firstPacket)
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Expect(err).ToNot(HaveOccurred())
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Expect(serv.sessions[connID].(*mockSession).packetCount).To(Equal(1))
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b := &bytes.Buffer{}
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// add an unsupported version
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data := []byte{0x09, 0x4c, 0xfa, 0x9f, 0x9b, 0x66, 0x86, 0x19, 0xf6}
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utils.BigEndian.WriteUint32(b, uint32(protocol.SupportedVersions[0]+1))
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data = append(append(data, b.Bytes()...), 0x01)
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err = serv.handlePacket(nil, nil, data)
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Expect(err).ToNot(HaveOccurred())
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// if we didn't ignore the packet, the server would try to send a version negotation packet, which would make the test panic because it doesn't have a udpConn
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Expect(conn.dataWritten.Bytes()).To(BeEmpty())
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// make sure the packet was *not* passed to session.handlePacket()
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Expect(serv.sessions[connID].(*mockSession).packetCount).To(Equal(1))
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})
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It("errors on invalid public header", func() {
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err := serv.handlePacket(nil, nil, nil)
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Expect(err.(*qerr.QuicError).ErrorCode).To(Equal(qerr.InvalidPacketHeader))
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})
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It("ignores public resets for unknown connections", func() {
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err := serv.handlePacket(nil, nil, wire.WritePublicReset(999, 1, 1337))
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Expect(err).ToNot(HaveOccurred())
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Expect(serv.sessions).To(BeEmpty())
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})
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It("ignores public resets for known connections", func() {
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err := serv.handlePacket(nil, nil, firstPacket)
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Expect(serv.sessions).To(HaveLen(1))
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Expect(serv.sessions[connID].(*mockSession).packetCount).To(Equal(1))
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err = serv.handlePacket(nil, nil, wire.WritePublicReset(connID, 1, 1337))
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Expect(err).ToNot(HaveOccurred())
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Expect(serv.sessions).To(HaveLen(1))
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Expect(serv.sessions[connID].(*mockSession).packetCount).To(Equal(1))
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})
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It("ignores invalid public resets for known connections", func() {
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err := serv.handlePacket(nil, nil, firstPacket)
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Expect(serv.sessions).To(HaveLen(1))
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Expect(serv.sessions[connID].(*mockSession).packetCount).To(Equal(1))
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data := wire.WritePublicReset(connID, 1, 1337)
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err = serv.handlePacket(nil, nil, data[:len(data)-2])
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Expect(err).ToNot(HaveOccurred())
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Expect(serv.sessions).To(HaveLen(1))
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Expect(serv.sessions[connID].(*mockSession).packetCount).To(Equal(1))
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})
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It("doesn't respond with a version negotiation packet if the first packet is too small", func() {
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b := &bytes.Buffer{}
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hdr := wire.Header{
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VersionFlag: true,
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ConnectionID: 0x1337,
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PacketNumber: 1,
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PacketNumberLen: protocol.PacketNumberLen2,
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}
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hdr.Write(b, protocol.PerspectiveClient, 13 /* not a valid QUIC version */)
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b.Write(bytes.Repeat([]byte{0}, protocol.MinClientHelloSize-1)) // this packet is 1 byte too small
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err := serv.handlePacket(conn, udpAddr, b.Bytes())
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Expect(err).To(MatchError("dropping small packet with unknown version"))
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Expect(conn.dataWritten.Len()).Should(BeZero())
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})
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})
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It("setups with the right values", func() {
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supportedVersions := []protocol.VersionNumber{1, 3, 5}
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acceptCookie := func(_ net.Addr, _ *Cookie) bool { return true }
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config := Config{
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Versions: supportedVersions,
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AcceptCookie: acceptCookie,
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HandshakeTimeout: 1337 * time.Hour,
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IdleTimeout: 42 * time.Minute,
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KeepAlive: true,
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}
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ln, err := Listen(conn, &tls.Config{}, &config)
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Expect(err).ToNot(HaveOccurred())
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server := ln.(*server)
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Expect(server.deleteClosedSessionsAfter).To(Equal(protocol.ClosedSessionDeleteTimeout))
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Expect(server.sessions).ToNot(BeNil())
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Expect(server.scfg).ToNot(BeNil())
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Expect(server.config.Versions).To(Equal(supportedVersions))
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Expect(server.config.HandshakeTimeout).To(Equal(1337 * time.Hour))
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Expect(server.config.IdleTimeout).To(Equal(42 * time.Minute))
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Expect(reflect.ValueOf(server.config.AcceptCookie)).To(Equal(reflect.ValueOf(acceptCookie)))
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Expect(server.config.KeepAlive).To(BeTrue())
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})
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It("fills in default values if options are not set in the Config", func() {
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ln, err := Listen(conn, &tls.Config{}, &Config{})
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Expect(err).ToNot(HaveOccurred())
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server := ln.(*server)
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Expect(server.config.Versions).To(Equal(protocol.SupportedVersions))
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Expect(server.config.HandshakeTimeout).To(Equal(protocol.DefaultHandshakeTimeout))
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Expect(server.config.IdleTimeout).To(Equal(protocol.DefaultIdleTimeout))
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Expect(reflect.ValueOf(server.config.AcceptCookie)).To(Equal(reflect.ValueOf(defaultAcceptCookie)))
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Expect(server.config.KeepAlive).To(BeFalse())
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})
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It("listens on a given address", func() {
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addr := "127.0.0.1:13579"
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ln, err := ListenAddr(addr, nil, config)
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Expect(err).ToNot(HaveOccurred())
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serv := ln.(*server)
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Expect(serv.Addr().String()).To(Equal(addr))
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})
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It("errors if given an invalid address", func() {
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addr := "127.0.0.1"
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_, err := ListenAddr(addr, nil, config)
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Expect(err).To(BeAssignableToTypeOf(&net.AddrError{}))
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})
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It("errors if given an invalid address", func() {
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addr := "1.1.1.1:1111"
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_, err := ListenAddr(addr, nil, config)
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Expect(err).To(BeAssignableToTypeOf(&net.OpError{}))
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})
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It("setups and responds with version negotiation", func() {
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config.Versions = []protocol.VersionNumber{99}
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b := &bytes.Buffer{}
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hdr := wire.Header{
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VersionFlag: true,
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ConnectionID: 0x1337,
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PacketNumber: 1,
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PacketNumberLen: protocol.PacketNumberLen2,
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}
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hdr.Write(b, protocol.PerspectiveClient, 13 /* not a valid QUIC version */)
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b.Write(bytes.Repeat([]byte{0}, protocol.MinClientHelloSize)) // add a fake CHLO
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conn.dataToRead <- b.Bytes()
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conn.dataReadFrom = udpAddr
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ln, err := Listen(conn, nil, config)
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Expect(err).ToNot(HaveOccurred())
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done := make(chan struct{})
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go func() {
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ln.Accept()
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close(done)
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}()
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Eventually(func() int { return conn.dataWritten.Len() }).ShouldNot(BeZero())
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Expect(conn.dataWrittenTo).To(Equal(udpAddr))
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r := bytes.NewReader(conn.dataWritten.Bytes())
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packet, err := wire.ParseHeaderSentByServer(r, protocol.VersionUnknown)
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Expect(err).ToNot(HaveOccurred())
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Expect(packet.VersionFlag).To(BeTrue())
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Expect(packet.ConnectionID).To(Equal(protocol.ConnectionID(0x1337)))
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Expect(r.Len()).To(BeZero())
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Consistently(done).ShouldNot(BeClosed())
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})
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It("sends an IETF draft style Version Negotaion Packet, if the client sent a IETF draft style header", func() {
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config.Versions = []protocol.VersionNumber{99, protocol.VersionTLS}
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b := &bytes.Buffer{}
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hdr := wire.Header{
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Type: protocol.PacketTypeInitial,
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IsLongHeader: true,
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ConnectionID: 0x1337,
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PacketNumber: 0x55,
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Version: 0x1234,
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}
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err := hdr.Write(b, protocol.PerspectiveClient, protocol.VersionTLS)
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Expect(err).ToNot(HaveOccurred())
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b.Write(bytes.Repeat([]byte{0}, protocol.MinInitialPacketSize)) // add a fake CHLO
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conn.dataToRead <- b.Bytes()
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|
conn.dataReadFrom = udpAddr
|
|
ln, err := Listen(conn, testdata.GetTLSConfig(), config)
|
|
Expect(err).ToNot(HaveOccurred())
|
|
|
|
done := make(chan struct{})
|
|
go func() {
|
|
ln.Accept()
|
|
close(done)
|
|
}()
|
|
|
|
Eventually(func() int { return conn.dataWritten.Len() }).ShouldNot(BeZero())
|
|
Expect(conn.dataWrittenTo).To(Equal(udpAddr))
|
|
r := bytes.NewReader(conn.dataWritten.Bytes())
|
|
packet, err := wire.ParseHeaderSentByServer(r, protocol.VersionUnknown)
|
|
Expect(err).ToNot(HaveOccurred())
|
|
Expect(packet.IsVersionNegotiation).To(BeTrue())
|
|
Expect(packet.ConnectionID).To(Equal(protocol.ConnectionID(0x1337)))
|
|
Expect(packet.PacketNumber).To(Equal(protocol.PacketNumber(0x55)))
|
|
Expect(r.Len()).To(BeZero())
|
|
Consistently(done).ShouldNot(BeClosed())
|
|
})
|
|
|
|
It("ignores IETF draft style Initial packets, if it doesn't support TLS", func() {
|
|
version := protocol.VersionNumber(99)
|
|
Expect(version.UsesTLS()).To(BeFalse())
|
|
config.Versions = []protocol.VersionNumber{version}
|
|
b := &bytes.Buffer{}
|
|
hdr := wire.Header{
|
|
Type: protocol.PacketTypeInitial,
|
|
IsLongHeader: true,
|
|
ConnectionID: 0x1337,
|
|
PacketNumber: 0x55,
|
|
Version: protocol.VersionTLS,
|
|
}
|
|
err := hdr.Write(b, protocol.PerspectiveClient, protocol.VersionTLS)
|
|
Expect(err).ToNot(HaveOccurred())
|
|
b.Write(bytes.Repeat([]byte{0}, protocol.MinClientHelloSize)) // add a fake CHLO
|
|
conn.dataToRead <- b.Bytes()
|
|
conn.dataReadFrom = udpAddr
|
|
ln, err := Listen(conn, testdata.GetTLSConfig(), config)
|
|
defer ln.Close()
|
|
Expect(err).ToNot(HaveOccurred())
|
|
Consistently(func() int { return conn.dataWritten.Len() }).Should(BeZero())
|
|
})
|
|
|
|
It("sends a PublicReset for new connections that don't have the VersionFlag set", func() {
|
|
conn.dataReadFrom = udpAddr
|
|
conn.dataToRead <- []byte{0x08, 0x4c, 0xfa, 0x9f, 0x9b, 0x66, 0x86, 0x19, 0xf6, 0x01}
|
|
ln, err := Listen(conn, nil, config)
|
|
Expect(err).ToNot(HaveOccurred())
|
|
go func() {
|
|
defer GinkgoRecover()
|
|
_, err := ln.Accept()
|
|
Expect(err).ToNot(HaveOccurred())
|
|
}()
|
|
|
|
Eventually(func() int { return conn.dataWritten.Len() }).ShouldNot(BeZero())
|
|
Expect(conn.dataWrittenTo).To(Equal(udpAddr))
|
|
Expect(conn.dataWritten.Bytes()[0] & 0x02).ToNot(BeZero()) // check that the ResetFlag is set
|
|
Expect(ln.(*server).sessions).To(BeEmpty())
|
|
})
|
|
})
|
|
|
|
var _ = Describe("default source address verification", func() {
|
|
It("accepts a token", func() {
|
|
remoteAddr := &net.UDPAddr{IP: net.IPv4(192, 168, 0, 1)}
|
|
cookie := &Cookie{
|
|
RemoteAddr: "192.168.0.1",
|
|
SentTime: time.Now().Add(-protocol.CookieExpiryTime).Add(time.Second), // will expire in 1 second
|
|
}
|
|
Expect(defaultAcceptCookie(remoteAddr, cookie)).To(BeTrue())
|
|
})
|
|
|
|
It("requests verification if no token is provided", func() {
|
|
remoteAddr := &net.UDPAddr{IP: net.IPv4(192, 168, 0, 1)}
|
|
Expect(defaultAcceptCookie(remoteAddr, nil)).To(BeFalse())
|
|
})
|
|
|
|
It("rejects a token if the address doesn't match", func() {
|
|
remoteAddr := &net.UDPAddr{IP: net.IPv4(192, 168, 0, 1)}
|
|
cookie := &Cookie{
|
|
RemoteAddr: "127.0.0.1",
|
|
SentTime: time.Now(),
|
|
}
|
|
Expect(defaultAcceptCookie(remoteAddr, cookie)).To(BeFalse())
|
|
})
|
|
|
|
It("accepts a token for a remote address is not a UDP address", func() {
|
|
remoteAddr := &net.TCPAddr{IP: net.IPv4(192, 168, 0, 1), Port: 1337}
|
|
cookie := &Cookie{
|
|
RemoteAddr: "192.168.0.1:1337",
|
|
SentTime: time.Now(),
|
|
}
|
|
Expect(defaultAcceptCookie(remoteAddr, cookie)).To(BeTrue())
|
|
})
|
|
|
|
It("rejects an invalid token for a remote address is not a UDP address", func() {
|
|
remoteAddr := &net.TCPAddr{IP: net.IPv4(192, 168, 0, 1), Port: 1337}
|
|
cookie := &Cookie{
|
|
RemoteAddr: "192.168.0.1:7331", // mismatching port
|
|
SentTime: time.Now(),
|
|
}
|
|
Expect(defaultAcceptCookie(remoteAddr, cookie)).To(BeFalse())
|
|
})
|
|
|
|
It("rejects an expired token", func() {
|
|
remoteAddr := &net.UDPAddr{IP: net.IPv4(192, 168, 0, 1)}
|
|
cookie := &Cookie{
|
|
RemoteAddr: "192.168.0.1",
|
|
SentTime: time.Now().Add(-protocol.CookieExpiryTime).Add(-time.Second), // expired 1 second ago
|
|
}
|
|
Expect(defaultAcceptCookie(remoteAddr, cookie)).To(BeFalse())
|
|
})
|
|
})
|