Exemplo n.º 1
0
func main() {
	target_addr := flag.String("target", default_target, "The partner to exchange latency measurement packets with")
	local_addr := protocols.ParseServerFlags("0.0.0.0", 6060)

	server, err := NewServer(local_addr)
	golib.Checkerr(err)
	client, err := NewClientFor(*target_addr)
	golib.Checkerr(err)

	measureLatency := golib.NewLoopTask("sending latency packets", func(stop golib.StopChan) {
		err := client.SendMeasureLatency()
		if err != nil {
			log.Println("Error sending Latency packet:", err)
		}
		select {
		case <-time.After(1 * time.Second):
		case <-stop:
		}
	})

	log.Println("Listening to Latency on " + local_addr + ", sending to: " + *target_addr)
	log.Println("Press Ctrl-C to close")
	golib.NewTaskGroup(
		server, measureLatency,
		&golib.NoopTask{golib.ExternalInterrupt(), "external interrupt"},
	).WaitAndExit()
}
Exemplo n.º 2
0
func startProxies(proxy_port, rtp_port int) (string, int) {
	proxy_ip := rtp_ip
	if !pretend_proxy {
		if use_pcp {
			proxy_ip = pcpProxyIp()
			client, err := pcp.NewClientFor(pcp_url)
			client.SetTimeout(time.Duration(client_timeout * float64(time.Second)))
			golib.Checkerr(err)
			log.Printf("Starting external proxies using %v\n", client)
			makeProxyPCP(client, proxy_port, rtp_port)
			makeProxyPCP(client, proxy_port+1, rtp_port+1)
			tasks.AddNamed("proxy", &golib.CleanupTask{Description: "stop proxies",
				Cleanup: func() {
					closeProxyPCP(client, proxy_port, rtp_port)
					closeProxyPCP(client, proxy_port+1, rtp_port+1)
					golib.Printerr(client.Close())
				}})
		} else {
			proxy1 := makeProxy(proxy_port, rtp_port)
			proxy2 := makeProxy(proxy_port+1, rtp_port+1)
			statistics = append(statistics, proxy1.Stats, proxy2.Stats)
			tasks.AddNamed("proxy", proxy1, proxy2, &golib.CleanupTask{
				Description: "print proxy errors",
				Cleanup: func() {
					if proxy1.Err != nil {
						log.Printf("Proxy %v error: %v\n", proxy_port, proxy1.Err)
					}
					if proxy2.Err != nil {
						log.Printf("Proxy %v error: %v\n", proxy_port+1, proxy2.Err)
					}
				}})
		}
	}
	return proxy_ip, proxy_port
}
Exemplo n.º 3
0
func makeProxy(listenPort, targetPort int) *proxies.UdpProxy {
	// Local proxy: use same IP as for RTP traffic
	listen := net.JoinHostPort(rtp_ip, strconv.Itoa(listenPort))
	target := net.JoinHostPort(rtp_ip, strconv.Itoa(targetPort))
	p, err := proxies.NewUdpProxy(listen, target)
	golib.Checkerr(err)
	log.Printf("UDP proxy started: %s\n", p)
	return p
}
Exemplo n.º 4
0
func main() {
	payloadSize := flag.Uint("payload", 0, "Additional payload to append to Load packets")
	amp_addr := protocols.ParseServerFlags("0.0.0.0", 7770)

	proto, err := protocols.NewProtocol("AMP/Load", amp.Protocol, amp_control.Protocol, ping.Protocol, heartbeat.Protocol)
	golib.Checkerr(err)
	server, err := protocols.NewServer(amp_addr, proto)
	golib.Checkerr(err)
	loadServer, err := RegisterLoadServer(server)
	golib.Checkerr(err)
	loadServer.PayloadSize = *payloadSize

	go printErrors(server)

	log.Println("Listening:", server)
	log.Println("Press Ctrl-C to close")
	golib.NewTaskGroup(
		server,
		&golib.NoopTask{golib.ExternalInterrupt(), "external interrupt"},
	).WaitAndExit()
}
Exemplo n.º 5
0
func main() {
	proxies.UdpProxyFlags()
	pcp_addr := protocols.ParseServerFlags("0.0.0.0", 7778)

	proto, err := protocols.NewProtocol("PCP", pcp.Protocol, ping.Protocol, heartbeat.Protocol)
	golib.Checkerr(err)
	server, err := protocols.NewServer(pcp_addr, proto)
	golib.Checkerr(err)
	proxy, err := proxies.RegisterPcpProxy(server)
	golib.Checkerr(err)

	go printPcpErrors(proxy)
	proxy.ProxyStartedCallback = proxyStarted
	proxy.ProxyStoppedCallback = proxyStopped

	log.Println("Listening:", server)
	log.Println("Press Ctrl-C to close")
	golib.NewTaskGroup(
		server,
		&golib.NoopTask{golib.ExternalInterrupt(), "external interrupt"},
	).WaitAndExit()
}
Exemplo n.º 6
0
func startStream(target_ip string, rtp_port int) {
	if use_amp {
		log.Println("Starting stream using AMP at", amp_url)
		client, err := amp.NewClientFor(amp_url)
		golib.Checkerr(err)
		client.SetTimeout(time.Duration(client_timeout * float64(time.Second)))
		golib.Checkerr(client.StartStream(target_ip, rtp_port, amp_media_file))
		tasks.AddNamed("stream", &golib.CleanupTask{Description: "stop rtp stream",
			Cleanup: func() {
				golib.Printerr(client.StopStream(target_ip, rtp_port))
				golib.Printerr(client.Close())
			}})
	}
	if use_rtsp {
		if target_ip != rtp_ip {
			log.Printf("Warning: RTSP server will stream media to %v, but we are expecting it on %v\n", rtp_ip, target_ip)
		}
		log.Println("Starting stream using RTSP at", rtsp_url)
		rtspCommand, err := rtpClient.StartRtspClient(rtsp_url, rtp_port, "main.log")
		golib.Checkerr(err)
		tasks.AddNamed("rtsp", rtspCommand)
	}
}
Exemplo n.º 7
0
func parseFlags() {
	flag.IntVar(&num_clients, "num", num_clients,
		"Number of parallel RTP streams to initiate.\n"+
			"\t\tproxy_port and rtp_port will be used as starting point for allocating the required number of ports.")

	flag.BoolVar(&close_stdin, "stdin", close_stdin, "Exit when stdin is closed")
	flag.BoolVar(&close_int, "int", close_int, "Exit when INT signal is received")

	flag.BoolVar(&show_dropped_packets_stats, "dropped_packet_stats", show_dropped_packets_stats, "Show numbers of packets dropped within the gortp stack")
	flag.BoolVar(&print_stats, "stats", print_stats, "Show various statistics about traffic")
	flag.BoolVar(&running_average, "average", running_average, "Show statistics averaged over the last 3 seconds")
	flag.BoolVar(&print_ctrl_events, "rtcp", print_ctrl_events, "Print RTCP events")

	flag.BoolVar(&use_rtsp, "rtsp", use_rtsp, "Initiate an RTSP session from the URL given by -rtsp_url")
	flag.StringVar(&rtsp_url, "rtsp_url", rtsp_url, "Set the URL used if -rtsp is given")

	flag.BoolVar(&use_amp, "amp", use_amp, "Initiate an AMP session at the server given by -amp_url")
	flag.StringVar(&amp_url, "amp_url", amp_url, "The AMP server used if -amp is given")
	flag.StringVar(&amp_media_file, "amp_file", amp_media_file, "The media file used with -amp")

	flag.BoolVar(&use_proxy, "proxy", use_proxy, "Route the RTP traffic through a proxy")
	flag.IntVar(&proxy_port, "proxy_port", proxy_port, "With -proxy, the port to receive traffic and forward it to -rtp_port")
	flag.BoolVar(&pretend_proxy, "pretend_proxy", pretend_proxy, "Don't really use proxies, but listen on the port that should receive the forwarded traffic. Implies -proxy.")
	flag.BoolVar(&use_pcp, "pcp", use_pcp, "Use external PCP server to satisfy -proxy. Implies -proxy")
	flag.StringVar(&pcp_url, "pcp_url", pcp_url, "The PCP server used for -pcp")

	flag.StringVar(&rtp_ip, "rtp", rtp_ip, "The local IP used to receive RTP/RTCP traffic")
	flag.IntVar(&start_rtp_port, "rtp_port", start_rtp_port, "The local port to receive RTP traffic")

	flag.BoolVar(&use_load, "load", use_load, "Listen for Load traffic instead of RTP/RTCP traffic")
	flag.BoolVar(&print_load_packets, "print_load_packets", print_load_packets, "Print incoming Load packets with timestamp")
	flag.Float64Var(&client_timeout, "timeout", client_timeout, "Timeout for client requests, if any are used")

	flag.Parse()

	use_proxy = use_proxy || use_pcp
	use_proxy = use_proxy || pretend_proxy
	if use_load && use_rtsp {
		golib.Checkerr(fmt.Errorf("-load cannot be used with -rtsp"))
	}
}
Exemplo n.º 8
0
func main() {
	loadBackend := flag.Bool("load", false, "Use Load servers to create the streams, instead of regular AMP Media servers")
	useHeartbeat := flag.Bool("heartbeat", false, "Use heartbeat-based fault detection instead of active ping-based detection")
	_heartbeat_frequency := flag.Uint("heartbeat_frequency", 200, "Time between two heartbeats which observers will send (milliseconds)")
	_heartbeat_timeout := flag.Uint("heartbeat_timeout", 350, "Time between two heartbeats before assuming offline server (milliseconds)")
	amp_addr := protocols.ParseServerFlags("0.0.0.0", 7779)
	heartbeat_frequency := time.Duration(*_heartbeat_frequency) * time.Millisecond
	heartbeat_timeout := time.Duration(*_heartbeat_timeout) * time.Millisecond

	var detector_factory balancer.FaultDetectorFactory
	tasks := golib.NewTaskGroup()
	var heartbeatServer *heartbeat.HeartbeatServer
	if *useHeartbeat {
		var err error
		heartbeatServer, err = heartbeat.NewHeartbeatServer(heartbeat_server)
		golib.Checkerr(err)
		go printServerErrors("Heartbeat", heartbeatServer.Server)
		log.Println("Listening for Heartbeats on", heartbeatServer.LocalAddr())
		detector_factory = func(endpoint string) (protocols.FaultDetector, error) {
			return heartbeatServer.ObserveServer(endpoint, heartbeat_frequency, heartbeat_timeout)
		}
		tasks.AddNamed("heartbeat", heartbeatServer)
	} else {
		detector_factory = func(endpoint string) (protocols.FaultDetector, error) {
			detector, err := ping.DialNewFaultDetector(endpoint)
			if err != nil {
				return nil, err
			}
			detector.Start()
			return detector, nil
		}
	}

	protocol, err := protocols.NewProtocol("AMP", amp.Protocol, ping.Protocol, heartbeat.Protocol)
	golib.Checkerr(err)
	baseServer, err := protocols.NewServer(amp_addr, protocol)
	golib.Checkerr(err)
	server, err := amp_balancer.RegisterPluginServer(baseServer)
	golib.Checkerr(err)
	tasks.AddNamed("server", server)

	ampPlugin := amp_balancer.NewAmpBalancingPlugin(detector_factory)
	server.AddPlugin(ampPlugin)
	pcpPlugin := amp_balancer.NewPcpBalancingPlugin(detector_factory)
	server.AddPlugin(pcpPlugin)

	if *loadBackend {
		for _, load := range load_servers {
			err := ampPlugin.AddBackendServer(load, stateChangePrinter)
			golib.Checkerr(err)
		}
	} else {
		for _, amp := range amp_servers {
			err := ampPlugin.AddBackendServer(amp, stateChangePrinter)
			golib.Checkerr(err)
		}
	}
	for _, pcp := range pcp_servers {
		err := pcpPlugin.AddBackendServer(pcp, stateChangePrinter)
		golib.Checkerr(err)
	}

	go printServerErrors("Server", server.Server)
	server.SessionStartedCallback = printSessionStarted
	server.SessionStoppedCallback = printSessionStopped

	log.Println("Listening to AMP on " + amp_addr)
	log.Println("Press Ctrl-C to close")

	if heartbeatServer != nil {
		tasks.Add(heartbeatServer)
	}
	tasks.Add(&golib.NoopTask{golib.ExternalInterrupt(), "external interrupt"})
	tasks.WaitAndExit()
}
Exemplo n.º 9
0
func makeProxyPCP(client *pcp.Client, listenPort, targetPort int) {
	golib.Checkerr(client.StartProxy(pcpProxyAddrs(listenPort, targetPort)))
}
Exemplo n.º 10
0
func pcpProxyIp() string {
	proxy_ip, _, err := net.SplitHostPort(pcp_url)
	golib.Checkerr(err)
	return proxy_ip
}