Esempio n. 1
0
func Start(
	configJson, embeddedServerEntryList string,
	provider PsiphonProvider,
	useDeviceBinder bool) error {

	if controller != nil {
		return fmt.Errorf("already started")
	}

	config, err := psiphon.LoadConfig([]byte(configJson))
	if err != nil {
		return fmt.Errorf("error loading configuration file: %s", err)
	}
	config.NetworkConnectivityChecker = provider

	if useDeviceBinder {
		config.DeviceBinder = provider
		config.DnsServerGetter = provider
	}

	psiphon.SetNoticeOutput(psiphon.NewNoticeReceiver(
		func(notice []byte) {
			provider.Notice(string(notice))
		}))

	// TODO: should following errors be Notices?

	err = psiphon.InitDataStore(config)
	if err != nil {
		return fmt.Errorf("error initializing datastore: %s", err)
	}

	serverEntries, err := psiphon.DecodeAndValidateServerEntryList(
		embeddedServerEntryList,
		psiphon.GetCurrentTimestamp(),
		psiphon.SERVER_ENTRY_SOURCE_EMBEDDED)
	if err != nil {
		return fmt.Errorf("error decoding embedded server entry list: %s", err)
	}
	err = psiphon.StoreServerEntries(serverEntries, false)
	if err != nil {
		return fmt.Errorf("error storing embedded server entry list: %s", err)
	}

	controller, err = psiphon.NewController(config)
	if err != nil {
		return fmt.Errorf("error initializing controller: %s", err)
	}

	shutdownBroadcast = make(chan struct{})
	controllerWaitGroup = new(sync.WaitGroup)
	controllerWaitGroup.Add(1)
	go func() {
		defer controllerWaitGroup.Done()
		controller.Run(shutdownBroadcast)
	}()

	return nil
}
// {{{ Run Psiphon
func runPsiphon() {
	// Initialize default Notice output
	psiphon.SetNoticeOutput(psiphonPipe.w)

	//TODO: Embedded server entries

	// {{{ Load and parse config file
	config, err := psiphon.LoadConfig(PSIPHON_CONFIG)
	if err != nil {
		psiphon.NoticeError("error processing configuration file: %s", err)
		os.Exit(1)
	}
	// }}}

	// {{{ Initialize data store

	err = psiphon.InitDataStore(config)
	if err != nil {
		psiphon.NoticeError("error initializing datastore: %s", err)
		os.Exit(1)
	}
	// }}}

	controller, err := psiphon.NewController(config)
	if err != nil {
		psiphon.NoticeError("error creating controller: %s", err)
		os.Exit(1)
	}

	shutdownBroadcast = make(chan struct{})
	controllerWaitGroup = new(sync.WaitGroup)
	controllerWaitGroup.Add(1)
	go func() {
		defer controllerWaitGroup.Done()
		controller.Run(shutdownBroadcast)
	}()
}
func main() {

	// Define command-line parameters

	var configFilename string
	flag.StringVar(&configFilename, "config", "", "configuration input file")

	var embeddedServerEntryListFilename string
	flag.StringVar(&embeddedServerEntryListFilename, "serverList", "", "embedded server entry list input file")

	var formatNotices bool
	flag.BoolVar(&formatNotices, "formatNotices", false, "emit notices in human-readable format")

	var profileFilename string
	flag.StringVar(&profileFilename, "profile", "", "CPU profile output file")

	var interfaceName string
	flag.StringVar(&interfaceName, "listenInterface", "", "Interface Name")

	flag.Parse()

	// Initialize default Notice output (stderr)

	var noticeWriter io.Writer
	noticeWriter = os.Stderr
	if formatNotices {
		noticeWriter = psiphon.NewNoticeConsoleRewriter(noticeWriter)
	}
	psiphon.SetNoticeOutput(noticeWriter)

	// Handle required config file parameter

	if configFilename == "" {
		psiphon.NoticeError("configuration file is required")
		os.Exit(1)
	}
	configFileContents, err := ioutil.ReadFile(configFilename)
	if err != nil {
		psiphon.NoticeError("error loading configuration file: %s", err)
		os.Exit(1)
	}
	config, err := psiphon.LoadConfig(configFileContents)
	if err != nil {
		psiphon.NoticeError("error processing configuration file: %s", err)
		os.Exit(1)
	}

	// When a logfile is configured, reinitialize Notice output

	if config.LogFilename != "" {
		logFile, err := os.OpenFile(config.LogFilename, os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0600)
		if err != nil {
			psiphon.NoticeError("error opening log file: %s", err)
			os.Exit(1)
		}
		defer logFile.Close()
		var noticeWriter io.Writer
		noticeWriter = logFile
		if formatNotices {
			noticeWriter = psiphon.NewNoticeConsoleRewriter(noticeWriter)
		}
		psiphon.SetNoticeOutput(noticeWriter)
	}

	// Handle optional profiling parameter

	if profileFilename != "" {
		profileFile, err := os.Create(profileFilename)
		if err != nil {
			psiphon.NoticeError("error opening profile file: %s", err)
			os.Exit(1)
		}
		pprof.StartCPUProfile(profileFile)
		defer pprof.StopCPUProfile()
	}

	// Initialize data store

	err = psiphon.InitDataStore(config)
	if err != nil {
		psiphon.NoticeError("error initializing datastore: %s", err)
		os.Exit(1)
	}

	// Handle optional embedded server list file parameter
	// If specified, the embedded server list is loaded and stored. When there
	// are no server candidates at all, we wait for this import to complete
	// before starting the Psiphon controller. Otherwise, we import while
	// concurrently starting the controller to minimize delay before attempting
	// to connect to existing candidate servers.
	// If the import fails, an error notice is emitted, but the controller is
	// still started: either existing candidate servers may suffice, or the
	// remote server list fetch may obtain candidate servers.
	if embeddedServerEntryListFilename != "" {
		embeddedServerListWaitGroup := new(sync.WaitGroup)
		embeddedServerListWaitGroup.Add(1)
		go func() {
			defer embeddedServerListWaitGroup.Done()
			serverEntryList, err := ioutil.ReadFile(embeddedServerEntryListFilename)
			if err != nil {
				psiphon.NoticeError("error loading embedded server entry list file: %s", err)
				return
			}
			// TODO: stream embedded server list data? also, the cast makes an unnecessary copy of a large buffer?
			serverEntries, err := psiphon.DecodeAndValidateServerEntryList(string(serverEntryList))
			if err != nil {
				psiphon.NoticeError("error decoding embedded server entry list file: %s", err)
				return
			}
			// Since embedded server list entries may become stale, they will not
			// overwrite existing stored entries for the same server.
			err = psiphon.StoreServerEntries(serverEntries, false)
			if err != nil {
				psiphon.NoticeError("error storing embedded server entry list data: %s", err)
				return
			}
		}()

		if psiphon.CountServerEntries(config.EgressRegion, config.TunnelProtocol) == 0 {
			embeddedServerListWaitGroup.Wait()
		} else {
			defer embeddedServerListWaitGroup.Wait()
		}
	}

	if interfaceName != "" {
		config.ListenInterface = interfaceName
	}

	// Run Psiphon

	controller, err := psiphon.NewController(config)
	if err != nil {
		psiphon.NoticeError("error creating controller: %s", err)
		os.Exit(1)
	}

	controllerStopSignal := make(chan struct{}, 1)
	shutdownBroadcast := make(chan struct{})
	controllerWaitGroup := new(sync.WaitGroup)
	controllerWaitGroup.Add(1)
	go func() {
		defer controllerWaitGroup.Done()
		controller.Run(shutdownBroadcast)
		controllerStopSignal <- *new(struct{})
	}()

	// Wait for an OS signal or a Run stop signal, then stop Psiphon and exit

	systemStopSignal := make(chan os.Signal, 1)
	signal.Notify(systemStopSignal, os.Interrupt, os.Kill)
	select {
	case <-systemStopSignal:
		psiphon.NoticeInfo("shutdown by system")
		close(shutdownBroadcast)
		controllerWaitGroup.Wait()
	case <-controllerStopSignal:
		psiphon.NoticeInfo("shutdown by controller")
	}
}
Esempio n. 4
0
func Start(
	configJson, embeddedServerEntryList string,
	provider PsiphonProvider,
	useDeviceBinder bool) error {

	if controller != nil {
		return fmt.Errorf("already started")
	}

	config, err := psiphon.LoadConfig([]byte(configJson))
	if err != nil {
		return fmt.Errorf("error loading configuration file: %s", err)
	}
	config.NetworkConnectivityChecker = provider

	if useDeviceBinder {
		config.DeviceBinder = provider
		config.DnsServerGetter = provider
	}

	psiphon.SetNoticeOutput(psiphon.NewNoticeReceiver(
		func(notice []byte) {
			provider.Notice(string(notice))
		}))

	// TODO: should following errors be Notices?

	err = psiphon.InitDataStore(config)
	if err != nil {
		return fmt.Errorf("error initializing datastore: %s", err)
	}

	// If specified, the embedded server list is loaded and stored. When there
	// are no server candidates at all, we wait for this import to complete
	// before starting the Psiphon controller. Otherwise, we import while
	// concurrently starting the controller to minimize delay before attempting
	// to connect to existing candidate servers.
	// If the import fails, an error notice is emitted, but the controller is
	// still started: either existing candidate servers may suffice, or the
	// remote server list fetch may obtain candidate servers.
	// TODO: duplicates logic in psiphonClient.go -- refactor?
	if embeddedServerEntryList != "" {
		embeddedServerListWaitGroup := new(sync.WaitGroup)
		embeddedServerListWaitGroup.Add(1)
		go func() {
			defer embeddedServerListWaitGroup.Done()
			// TODO: stream embedded server list data?
			serverEntries, err := psiphon.DecodeAndValidateServerEntryList(embeddedServerEntryList)
			if err != nil {
				psiphon.NoticeError("error decoding embedded server entry list file: %s", err)
				return
			}
			// Since embedded server list entries may become stale, they will not
			// overwrite existing stored entries for the same server.
			err = psiphon.StoreServerEntries(serverEntries, false)
			if err != nil {
				psiphon.NoticeError("error storing embedded server entry list data: %s", err)
				return
			}
		}()

		if psiphon.CountServerEntries(config.EgressRegion, config.TunnelProtocol) == 0 {
			embeddedServerListWaitGroup.Wait()
		} else {
			defer embeddedServerListWaitGroup.Wait()
		}
	}

	controller, err = psiphon.NewController(config)
	if err != nil {
		return fmt.Errorf("error initializing controller: %s", err)
	}

	shutdownBroadcast = make(chan struct{})
	controllerWaitGroup = new(sync.WaitGroup)
	controllerWaitGroup.Add(1)
	go func() {
		defer controllerWaitGroup.Done()
		controller.Run(shutdownBroadcast)
	}()

	return nil
}
func runServer(t *testing.T, runConfig *runServerConfig) {

	// create a server

	var err error
	serverIPaddress := ""
	for _, interfaceName := range []string{"eth0", "en0"} {
		serverIPaddress, err = common.GetInterfaceIPAddress(interfaceName)
		if err == nil {
			break
		}
	}
	if err != nil {
		t.Fatalf("error getting server IP address: %s", err)
	}

	serverConfigJSON, _, encodedServerEntry, err := GenerateConfig(
		&GenerateConfigParams{
			ServerIPAddress:      serverIPaddress,
			EnableSSHAPIRequests: runConfig.enableSSHAPIRequests,
			WebServerPort:        8000,
			TunnelProtocolPorts:  map[string]int{runConfig.tunnelProtocol: 4000},
		})
	if err != nil {
		t.Fatalf("error generating server config: %s", err)
	}

	// customize server config

	// Pave psinet with random values to test handshake homepages.
	psinetFilename := filepath.Join(testDataDirName, "psinet.json")
	sponsorID, expectedHomepageURL := pavePsinetDatabaseFile(t, psinetFilename)

	// Pave traffic rules file which exercises handshake parameter filtering. Client
	// must handshake with specified sponsor ID in order to allow ports for tunneled
	// requests.
	trafficRulesFilename := filepath.Join(testDataDirName, "traffic_rules.json")
	paveTrafficRulesFile(t, trafficRulesFilename, sponsorID, runConfig.denyTrafficRules)

	oslConfigFilename := filepath.Join(testDataDirName, "osl_config.json")
	propagationChannelID := paveOSLConfigFile(t, oslConfigFilename)

	var serverConfig map[string]interface{}
	json.Unmarshal(serverConfigJSON, &serverConfig)
	serverConfig["GeoIPDatabaseFilename"] = ""
	serverConfig["PsinetDatabaseFilename"] = psinetFilename
	serverConfig["TrafficRulesFilename"] = trafficRulesFilename
	serverConfig["OSLConfigFilename"] = oslConfigFilename
	serverConfig["LogLevel"] = "error"

	serverConfigJSON, _ = json.Marshal(serverConfig)

	// run server

	serverWaitGroup := new(sync.WaitGroup)
	serverWaitGroup.Add(1)
	go func() {
		defer serverWaitGroup.Done()
		err := RunServices(serverConfigJSON)
		if err != nil {
			// TODO: wrong goroutine for t.FatalNow()
			t.Fatalf("error running server: %s", err)
		}
	}()
	defer func() {

		// Test: orderly server shutdown

		p, _ := os.FindProcess(os.Getpid())
		p.Signal(os.Interrupt)

		shutdownTimeout := time.NewTimer(5 * time.Second)

		shutdownOk := make(chan struct{}, 1)
		go func() {
			serverWaitGroup.Wait()
			shutdownOk <- *new(struct{})
		}()

		select {
		case <-shutdownOk:
		case <-shutdownTimeout.C:
			t.Fatalf("server shutdown timeout exceeded")
		}
	}()

	// TODO: monitor logs for more robust wait-until-loaded
	time.Sleep(1 * time.Second)

	// Test: hot reload (of psinet and traffic rules)

	if runConfig.doHotReload {

		// Pave a new psinet and traffic rules with different random values.
		sponsorID, expectedHomepageURL = pavePsinetDatabaseFile(t, psinetFilename)
		paveTrafficRulesFile(t, trafficRulesFilename, sponsorID, runConfig.denyTrafficRules)

		p, _ := os.FindProcess(os.Getpid())
		p.Signal(syscall.SIGUSR1)

		// TODO: monitor logs for more robust wait-until-reloaded
		time.Sleep(1 * time.Second)

		// After reloading psinet, the new sponsorID/expectedHomepageURL
		// should be active, as tested in the client "Homepage" notice
		// handler below.
	}

	// Exercise server_load logging
	p, _ := os.FindProcess(os.Getpid())
	p.Signal(syscall.SIGUSR2)

	// connect to server with client

	// TODO: currently, TargetServerEntry only works with one tunnel
	numTunnels := 1
	localSOCKSProxyPort := 1081
	localHTTPProxyPort := 8081
	establishTunnelPausePeriodSeconds := 1

	// Note: calling LoadConfig ensures all *int config fields are initialized
	clientConfigJSON := `
    {
        "ClientPlatform" : "Windows",
        "ClientVersion" : "0",
        "SponsorId" : "0",
        "PropagationChannelId" : "0",
        "DisableRemoteServerListFetcher" : true
    }`
	clientConfig, _ := psiphon.LoadConfig([]byte(clientConfigJSON))

	clientConfig.SponsorId = sponsorID
	clientConfig.PropagationChannelId = propagationChannelID
	clientConfig.ConnectionWorkerPoolSize = numTunnels
	clientConfig.TunnelPoolSize = numTunnels
	clientConfig.EstablishTunnelPausePeriodSeconds = &establishTunnelPausePeriodSeconds
	clientConfig.TargetServerEntry = string(encodedServerEntry)
	clientConfig.TunnelProtocol = runConfig.tunnelProtocol
	clientConfig.LocalSocksProxyPort = localSOCKSProxyPort
	clientConfig.LocalHttpProxyPort = localHTTPProxyPort
	clientConfig.EmitSLOKs = true

	if runConfig.doClientVerification {
		clientConfig.ClientPlatform = "Android"
	}

	clientConfig.DataStoreDirectory = testDataDirName
	err = psiphon.InitDataStore(clientConfig)
	if err != nil {
		t.Fatalf("error initializing client datastore: %s", err)
	}

	controller, err := psiphon.NewController(clientConfig)
	if err != nil {
		t.Fatalf("error creating client controller: %s", err)
	}

	tunnelsEstablished := make(chan struct{}, 1)
	homepageReceived := make(chan struct{}, 1)
	slokSeeded := make(chan struct{}, 1)
	verificationRequired := make(chan struct{}, 1)
	verificationCompleted := make(chan struct{}, 1)

	psiphon.SetNoticeOutput(psiphon.NewNoticeReceiver(
		func(notice []byte) {

			//fmt.Printf("%s\n", string(notice))

			noticeType, payload, err := psiphon.GetNotice(notice)
			if err != nil {
				return
			}

			switch noticeType {
			case "Tunnels":
				// Do not set verification payload until tunnel is
				// established. Otherwise will silently take no action.
				controller.SetClientVerificationPayloadForActiveTunnels("")
				count := int(payload["count"].(float64))
				if count >= numTunnels {
					sendNotificationReceived(tunnelsEstablished)
				}
			case "Homepage":
				homepageURL := payload["url"].(string)
				if homepageURL != expectedHomepageURL {
					// TODO: wrong goroutine for t.FatalNow()
					t.Fatalf("unexpected homepage: %s", homepageURL)
				}
				sendNotificationReceived(homepageReceived)
			case "SLOKSeeded":
				sendNotificationReceived(slokSeeded)
			case "ClientVerificationRequired":
				sendNotificationReceived(verificationRequired)
				controller.SetClientVerificationPayloadForActiveTunnels(dummyClientVerificationPayload)
			case "NoticeClientVerificationRequestCompleted":
				sendNotificationReceived(verificationCompleted)
			}
		}))

	controllerShutdownBroadcast := make(chan struct{})
	controllerWaitGroup := new(sync.WaitGroup)
	controllerWaitGroup.Add(1)
	go func() {
		defer controllerWaitGroup.Done()
		controller.Run(controllerShutdownBroadcast)
	}()
	defer func() {
		close(controllerShutdownBroadcast)

		shutdownTimeout := time.NewTimer(20 * time.Second)

		shutdownOk := make(chan struct{}, 1)
		go func() {
			controllerWaitGroup.Wait()
			shutdownOk <- *new(struct{})
		}()

		select {
		case <-shutdownOk:
		case <-shutdownTimeout.C:
			t.Fatalf("controller shutdown timeout exceeded")
		}
	}()

	// Test: tunnels must be established, and correct homepage
	// must be received, within 30 seconds

	timeoutSignal := make(chan struct{})
	go func() {
		timer := time.NewTimer(30 * time.Second)
		<-timer.C
		close(timeoutSignal)
	}()

	waitOnNotification(t, tunnelsEstablished, timeoutSignal, "tunnel establish timeout exceeded")
	waitOnNotification(t, homepageReceived, timeoutSignal, "homepage received timeout exceeded")

	if runConfig.doClientVerification {
		waitOnNotification(t, verificationRequired, timeoutSignal, "verification required timeout exceeded")
		waitOnNotification(t, verificationCompleted, timeoutSignal, "verification completed timeout exceeded")
	}

	if runConfig.doTunneledWebRequest {

		// Test: tunneled web site fetch

		err = makeTunneledWebRequest(t, localHTTPProxyPort)

		if err == nil {
			if runConfig.denyTrafficRules {
				t.Fatalf("unexpected tunneled web request success")
			}
		} else {
			if !runConfig.denyTrafficRules {
				t.Fatalf("tunneled web request failed: %s", err)
			}
		}
	}

	if runConfig.doTunneledNTPRequest {

		// Test: tunneled UDP packets

		udpgwServerAddress := serverConfig["UDPInterceptUdpgwServerAddress"].(string)

		err = makeTunneledNTPRequest(t, localSOCKSProxyPort, udpgwServerAddress)

		if err == nil {
			if runConfig.denyTrafficRules {
				t.Fatalf("unexpected tunneled NTP request success")
			}
		} else {
			if !runConfig.denyTrafficRules {
				t.Fatalf("tunneled NTP request failed: %s", err)
			}
		}
	}

	// Test: await SLOK payload

	if !runConfig.denyTrafficRules {
		time.Sleep(1 * time.Second)
		waitOnNotification(t, slokSeeded, timeoutSignal, "SLOK seeded timeout exceeded")
	}
}
Esempio n. 6
0
func runServer(t *testing.T, runConfig *runServerConfig) {

	// create a server

	serverConfigJSON, _, encodedServerEntry, err := GenerateConfig(
		&GenerateConfigParams{
			ServerIPAddress:      "127.0.0.1",
			EnableSSHAPIRequests: runConfig.enableSSHAPIRequests,
			WebServerPort:        8000,
			TunnelProtocolPorts:  map[string]int{runConfig.tunnelProtocol: 4000},
		})
	if err != nil {
		t.Fatalf("error generating server config: %s", err)
	}

	// customize server config

	// Pave psinet with random values to test handshake homepages.
	psinetFilename := "psinet.json"
	sponsorID, expectedHomepageURL := pavePsinetDatabaseFile(t, psinetFilename)

	var serverConfig interface{}
	json.Unmarshal(serverConfigJSON, &serverConfig)
	serverConfig.(map[string]interface{})["GeoIPDatabaseFilename"] = ""
	serverConfig.(map[string]interface{})["PsinetDatabaseFilename"] = psinetFilename
	serverConfig.(map[string]interface{})["TrafficRulesFilename"] = ""
	serverConfigJSON, _ = json.Marshal(serverConfig)

	// run server

	serverWaitGroup := new(sync.WaitGroup)
	serverWaitGroup.Add(1)
	go func() {
		defer serverWaitGroup.Done()
		err := RunServices(serverConfigJSON)
		if err != nil {
			// TODO: wrong goroutine for t.FatalNow()
			t.Fatalf("error running server: %s", err)
		}
	}()
	defer func() {

		// Test: orderly server shutdown

		p, _ := os.FindProcess(os.Getpid())
		p.Signal(os.Interrupt)

		shutdownTimeout := time.NewTimer(5 * time.Second)

		shutdownOk := make(chan struct{}, 1)
		go func() {
			serverWaitGroup.Wait()
			shutdownOk <- *new(struct{})
		}()

		select {
		case <-shutdownOk:
		case <-shutdownTimeout.C:
			t.Fatalf("server shutdown timeout exceeded")
		}
	}()

	// Test: hot reload (of psinet)

	if runConfig.doHotReload {
		// TODO: monitor logs for more robust wait-until-loaded
		time.Sleep(1 * time.Second)

		// Pave a new psinet with different random values.
		sponsorID, expectedHomepageURL = pavePsinetDatabaseFile(t, psinetFilename)

		p, _ := os.FindProcess(os.Getpid())
		p.Signal(syscall.SIGUSR1)

		// TODO: monitor logs for more robust wait-until-reloaded
		time.Sleep(1 * time.Second)

		// After reloading psinet, the new sponsorID/expectedHomepageURL
		// should be active, as tested in the client "Homepage" notice
		// handler below.
	}

	// connect to server with client

	// TODO: currently, TargetServerEntry only works with one tunnel
	numTunnels := 1
	localHTTPProxyPort := 8081
	establishTunnelPausePeriodSeconds := 1

	// Note: calling LoadConfig ensures all *int config fields are initialized
	clientConfigJSON := `
    {
        "ClientVersion" : "0",
        "SponsorId" : "0",
        "PropagationChannelId" : "0"
    }`
	clientConfig, _ := psiphon.LoadConfig([]byte(clientConfigJSON))

	clientConfig.SponsorId = sponsorID
	clientConfig.ConnectionWorkerPoolSize = numTunnels
	clientConfig.TunnelPoolSize = numTunnels
	clientConfig.DisableRemoteServerListFetcher = true
	clientConfig.EstablishTunnelPausePeriodSeconds = &establishTunnelPausePeriodSeconds
	clientConfig.TargetServerEntry = string(encodedServerEntry)
	clientConfig.TunnelProtocol = runConfig.tunnelProtocol
	clientConfig.LocalHttpProxyPort = localHTTPProxyPort

	err = psiphon.InitDataStore(clientConfig)
	if err != nil {
		t.Fatalf("error initializing client datastore: %s", err)
	}

	controller, err := psiphon.NewController(clientConfig)
	if err != nil {
		t.Fatalf("error creating client controller: %s", err)
	}

	tunnelsEstablished := make(chan struct{}, 1)
	homepageReceived := make(chan struct{}, 1)

	psiphon.SetNoticeOutput(psiphon.NewNoticeReceiver(
		func(notice []byte) {

			//fmt.Printf("%s\n", string(notice))

			noticeType, payload, err := psiphon.GetNotice(notice)
			if err != nil {
				return
			}

			switch noticeType {
			case "Tunnels":
				count := int(payload["count"].(float64))
				if count >= numTunnels {
					select {
					case tunnelsEstablished <- *new(struct{}):
					default:
					}
				}
			case "Homepage":
				homepageURL := payload["url"].(string)
				if homepageURL != expectedHomepageURL {
					// TODO: wrong goroutine for t.FatalNow()
					t.Fatalf("unexpected homepage: %s", homepageURL)
				}
				select {
				case homepageReceived <- *new(struct{}):
				default:
				}
			}
		}))

	controllerShutdownBroadcast := make(chan struct{})
	controllerWaitGroup := new(sync.WaitGroup)
	controllerWaitGroup.Add(1)
	go func() {
		defer controllerWaitGroup.Done()
		controller.Run(controllerShutdownBroadcast)
	}()
	defer func() {
		close(controllerShutdownBroadcast)

		shutdownTimeout := time.NewTimer(20 * time.Second)

		shutdownOk := make(chan struct{}, 1)
		go func() {
			controllerWaitGroup.Wait()
			shutdownOk <- *new(struct{})
		}()

		select {
		case <-shutdownOk:
		case <-shutdownTimeout.C:
			t.Fatalf("controller shutdown timeout exceeded")
		}
	}()

	// Test: tunnels must be established, and correct homepage
	// must be received, within 30 seconds

	establishTimeout := time.NewTimer(30 * time.Second)
	select {
	case <-tunnelsEstablished:
	case <-establishTimeout.C:
		t.Fatalf("tunnel establish timeout exceeded")
	}

	select {
	case <-homepageReceived:
	case <-establishTimeout.C:
		t.Fatalf("homepage received timeout exceeded")
	}

	// Test: tunneled web site fetch

	testUrl := "https://psiphon.ca"
	roundTripTimeout := 30 * time.Second

	proxyUrl, err := url.Parse(fmt.Sprintf("http://127.0.0.1:%d", localHTTPProxyPort))
	if err != nil {
		t.Fatalf("error initializing proxied HTTP request: %s", err)
	}

	httpClient := &http.Client{
		Transport: &http.Transport{
			Proxy: http.ProxyURL(proxyUrl),
		},
		Timeout: roundTripTimeout,
	}

	response, err := httpClient.Get(testUrl)
	if err != nil {
		t.Fatalf("error sending proxied HTTP request: %s", err)
	}

	_, err = ioutil.ReadAll(response.Body)
	if err != nil {
		t.Fatalf("error reading proxied HTTP response: %s", err)
	}
	response.Body.Close()
}