mirror of
https://github.com/refraction-networking/uquic.git
synced 2025-04-04 20:57:36 +03:00
236 lines
8.4 KiB
Go
236 lines
8.4 KiB
Go
package quic
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import (
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"bytes"
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"errors"
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"net"
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"reflect"
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"unsafe"
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"github.com/lucas-clemente/quic-go/protocol"
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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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var _ = Describe("Client", func() {
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var (
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cl *client
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config *Config
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sess *mockSession
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packetConn *mockPacketConn
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addr net.Addr
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)
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BeforeEach(func() {
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Eventually(areSessionsRunning).Should(BeFalse())
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packetConn = &mockPacketConn{}
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config = &Config{
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Versions: []protocol.VersionNumber{protocol.SupportedVersions[0], 77, 78},
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}
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addr = &net.UDPAddr{IP: net.IPv4(192, 168, 100, 200), Port: 1337}
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sess = &mockSession{connectionID: 0x1337}
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cl = &client{
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config: config,
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connectionID: 0x1337,
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session: sess,
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version: protocol.SupportedVersions[0],
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conn: &conn{pconn: packetConn, currentAddr: addr},
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errorChan: make(chan struct{}),
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handshakeChan: make(chan handshakeEvent),
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}
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})
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AfterEach(func() {
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if s, ok := cl.session.(*session); ok {
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s.Close(nil)
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}
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Eventually(areSessionsRunning).Should(BeFalse())
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})
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Context("Dialing", func() {
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PIt("creates a new client", func() {
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packetConn.dataToRead = []byte{0x0, 0x1, 0x0}
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sess, err := Dial(packetConn, addr, "quic.clemente.io:1337", config)
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Expect(err).ToNot(HaveOccurred())
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Expect(*(*[]protocol.VersionNumber)(unsafe.Pointer(reflect.ValueOf(sess.(*session).cryptoSetup).Elem().FieldByName("negotiatedVersions").UnsafeAddr()))).To(BeNil())
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Expect(*(*string)(unsafe.Pointer(reflect.ValueOf(sess.(*session).cryptoSetup).Elem().FieldByName("hostname").UnsafeAddr()))).To(Equal("quic.clemente.io"))
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sess.Close(nil)
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})
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It("uses all supported versions, if none are specified in the quic.Config", func() {
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c := populateClientConfig(&Config{})
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Expect(c.Versions).To(Equal(protocol.SupportedVersions))
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})
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It("errors when receiving an invalid first packet from the server", func() {
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packetConn.dataToRead = []byte{0xff}
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sess, err := Dial(packetConn, addr, "quic.clemente.io:1337", config)
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Expect(err).To(HaveOccurred())
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Expect(sess).To(BeNil())
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})
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It("errors when receiving an error from the connection", func() {
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testErr := errors.New("connection error")
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packetConn.readErr = testErr
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_, err := Dial(packetConn, addr, "quic.clemente.io:1337", config)
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Expect(err).To(MatchError(testErr))
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})
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})
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It("errors on invalid public header", func() {
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err := cl.handlePacket(nil, nil)
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Expect(err.(*qerr.QuicError).ErrorCode).To(Equal(qerr.InvalidPacketHeader))
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})
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// this test requires a real session
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// and a real UDP conn (because it unblocks and errors when it is closed)
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PIt("properly closes", func(done Done) {
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Eventually(areSessionsRunning).Should(BeFalse())
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udpConn, err := net.ListenUDP("udp", &net.UDPAddr{IP: net.IPv4(127, 0, 0, 1)})
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Expect(err).ToNot(HaveOccurred())
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cl.conn = &conn{pconn: udpConn, currentAddr: &net.UDPAddr{IP: net.IPv4(127, 0, 0, 1), Port: 1337}}
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err = cl.createNewSession(nil)
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Expect(err).ToNot(HaveOccurred())
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Eventually(areSessionsRunning).Should(BeTrue())
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var stoppedListening bool
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go func() {
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cl.listen()
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stoppedListening = true
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}()
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testErr := errors.New("test error")
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err = cl.session.Close(testErr)
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Expect(err).ToNot(HaveOccurred())
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Eventually(func() bool { return stoppedListening }).Should(BeTrue())
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Eventually(areSessionsRunning).Should(BeFalse())
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close(done)
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}, 10)
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It("creates new sessions with the right parameters", func() {
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cl.session = nil
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cl.hostname = "hostname"
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err := cl.createNewSession(nil)
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Expect(err).ToNot(HaveOccurred())
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Expect(cl.session).ToNot(BeNil())
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Expect(cl.session.(*session).connectionID).To(Equal(cl.connectionID))
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Expect(cl.session.(*session).version).To(Equal(cl.version))
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})
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Context("handling packets", func() {
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It("handles packets", func() {
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ph := PublicHeader{
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PacketNumber: 1,
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PacketNumberLen: protocol.PacketNumberLen2,
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ConnectionID: 0x1337,
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}
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b := &bytes.Buffer{}
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err := ph.Write(b, protocol.Version36, protocol.PerspectiveServer)
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Expect(err).ToNot(HaveOccurred())
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packetConn.dataToRead = b.Bytes()
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Expect(sess.packetCount).To(BeZero())
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var stoppedListening bool
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go func() {
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cl.listen()
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// it should continue listening when receiving valid packets
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stoppedListening = true
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}()
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Eventually(func() int { return sess.packetCount }).Should(Equal(1))
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Expect(sess.closed).To(BeFalse())
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Consistently(func() bool { return stoppedListening }).Should(BeFalse())
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})
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It("closes the session when encountering an error while handling a packet", func() {
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Expect(sess.closeReason).ToNot(HaveOccurred())
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packetConn.dataToRead = bytes.Repeat([]byte{0xff}, 100)
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cl.listen()
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Expect(sess.closed).To(BeTrue())
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Expect(sess.closeReason).To(HaveOccurred())
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})
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It("closes the session when encountering an error while reading from the connection", func() {
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testErr := errors.New("test error")
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packetConn.readErr = testErr
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cl.listen()
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Expect(sess.closed).To(BeTrue())
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Expect(sess.closeReason).To(MatchError(testErr))
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})
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})
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Context("version negotiation", func() {
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It("recognizes that a packet without VersionFlag means that the server accepted the suggested version", func() {
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ph := PublicHeader{
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PacketNumber: 1,
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PacketNumberLen: protocol.PacketNumberLen2,
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ConnectionID: 0x1337,
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}
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b := &bytes.Buffer{}
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err := ph.Write(b, protocol.VersionWhatever, protocol.PerspectiveServer)
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Expect(err).ToNot(HaveOccurred())
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err = cl.handlePacket(nil, b.Bytes())
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Expect(err).ToNot(HaveOccurred())
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Expect(cl.versionNegotiated).To(BeTrue())
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})
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It("changes the version after receiving a version negotiation packet", func() {
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newVersion := protocol.VersionNumber(77)
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Expect(config.Versions).To(ContainElement(newVersion))
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Expect(newVersion).ToNot(Equal(cl.version))
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Expect(sess.packetCount).To(BeZero())
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cl.connectionID = 0x1337
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err := cl.handlePacket(nil, composeVersionNegotiation(0x1337, []protocol.VersionNumber{newVersion}))
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Expect(err).ToNot(HaveOccurred())
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Expect(cl.version).To(Equal(newVersion))
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Expect(cl.versionNegotiated).To(BeTrue())
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// it swapped the sessions
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Expect(cl.session).ToNot(Equal(sess))
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Expect(cl.connectionID).ToNot(Equal(0x1337)) // it generated a new connection ID
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Expect(err).ToNot(HaveOccurred())
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// it didn't pass the version negoation packet to the old session (since it has no payload)
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Expect(sess.packetCount).To(BeZero())
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// if the version negotiation packet was passed to the new session, it would end up as an undecryptable packet there
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Expect(cl.session.(*session).undecryptablePackets).To(BeEmpty())
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Expect(*(*[]protocol.VersionNumber)(unsafe.Pointer(reflect.ValueOf(cl.session.(*session).cryptoSetup).Elem().FieldByName("negotiatedVersions").UnsafeAddr()))).To(Equal([]protocol.VersionNumber{newVersion}))
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})
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It("errors if no matching version is found", func() {
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err := cl.handlePacket(nil, composeVersionNegotiation(0x1337, []protocol.VersionNumber{1}))
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Expect(err).To(MatchError(qerr.InvalidVersion))
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})
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It("errors if the version is supported by quic-go, but disabled by the quic.Config", func() {
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v := protocol.SupportedVersions[1]
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Expect(v).ToNot(Equal(cl.version))
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Expect(config.Versions).ToNot(ContainElement(v))
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err := cl.handlePacket(nil, composeVersionNegotiation(0x1337, []protocol.VersionNumber{v}))
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Expect(err).To(MatchError(qerr.InvalidVersion))
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})
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It("changes to the version preferred by the quic.Config", func() {
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err := cl.handlePacket(nil, composeVersionNegotiation(0x1337, []protocol.VersionNumber{config.Versions[2], config.Versions[1]}))
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Expect(err).ToNot(HaveOccurred())
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Expect(cl.version).To(Equal(config.Versions[1]))
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})
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It("ignores delayed version negotiation packets", func() {
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// if the version was not yet negotiated, handlePacket would return a VersionNegotiationMismatch error, see above test
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cl.versionNegotiated = true
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Expect(sess.packetCount).To(BeZero())
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err := cl.handlePacket(nil, composeVersionNegotiation(0x1337, []protocol.VersionNumber{1}))
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Expect(err).ToNot(HaveOccurred())
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Expect(cl.versionNegotiated).To(BeTrue())
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Expect(sess.packetCount).To(BeZero())
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})
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It("drops version negotiation packets that contain the offered version", func() {
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ver := cl.version
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err := cl.handlePacket(nil, composeVersionNegotiation(0x1337, []protocol.VersionNumber{ver}))
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Expect(err).ToNot(HaveOccurred())
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Expect(cl.version).To(Equal(ver))
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})
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})
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})
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