Exemplo n.º 1
0
func NewPcapProbesHandler(tb *probes.TopologyProbeBundle, g *graph.Graph, p *mappings.FlowMappingPipeline, a *analyzer.Client) *PcapProbesHandler {
	handler := &PcapProbesHandler{
		graph:               g,
		analyzerClient:      a,
		flowMappingPipeline: p,
		flowTable:           flow.NewFlowTable(),
		probes:              make(map[string]*PcapProbe),
	}
	return handler
}
Exemplo n.º 2
0
func NewServer(addr string, port int, router *mux.Router) (*Server, error) {
	backend, err := graph.BackendFromConfig()
	if err != nil {
		return nil, err
	}

	g, err := graph.NewGraph(backend)
	if err != nil {
		return nil, err
	}

	tserver := topology.NewServer(g, addr, port, router)
	tserver.RegisterStaticEndpoints()
	tserver.RegisterRpcEndpoints()

	alertmgr := graph.NewAlert(g, router)
	alertmgr.RegisterRpcEndpoints()

	gserver, err := graph.NewServerFromConfig(g, alertmgr, router)
	if err != nil {
		return nil, err
	}

	gfe, err := mappings.NewGraphFlowEnhancer(g)
	if err != nil {
		return nil, err
	}

	pipeline := mappings.NewFlowMappingPipeline([]mappings.FlowEnhancer{gfe})

	flowtable := flow.NewFlowTable()

	server := &Server{
		Addr:                addr,
		Port:                port,
		Router:              router,
		TopoServer:          tserver,
		GraphServer:         gserver,
		FlowMappingPipeline: pipeline,
		FlowTable:           flowtable,
	}
	server.RegisterStaticEndpoints()
	server.RegisterRpcEndpoints()
	cfgFlowtable_expire, err := config.GetConfig().Section("analyzer").Key("flowtable_expire").Int()
	if err != nil || cfgFlowtable_expire < 1 {
		logging.GetLogger().Error("Config flowTable_expire invalid value ", cfgFlowtable_expire, err.Error())
		return nil, err
	}
	go flowtable.AsyncExpire(server.flowExpire, time.Duration(cfgFlowtable_expire)*time.Minute)

	return server, nil
}
Exemplo n.º 3
0
func (sfa *SFlowAgent) start() error {
	addr := net.UDPAddr{
		Port: sfa.Port,
		IP:   net.ParseIP(sfa.Addr),
	}
	conn, err := net.ListenUDP("udp", &addr)
	if err != nil {
		logging.GetLogger().Errorf("Unable to listen on port %d: %s", sfa.Port, err.Error())
		return err
	}
	defer conn.Close()
	conn.SetDeadline(time.Now().Add(1 * time.Second))

	sfa.wg.Add(1)
	defer sfa.wg.Done()

	sfa.running.Store(true)

	sfa.flowTable = flow.NewFlowTable()
	defer sfa.flowTable.UnregisterAll()

	cfgFlowtable_expire := config.GetConfig().GetInt("agent.flowtable_expire")
	sfa.flowTable.RegisterExpire(sfa.asyncFlowPipeline, time.Duration(cfgFlowtable_expire)*time.Second)

	cfgFlowtable_update := config.GetConfig().GetInt("agent.flowtable_update")
	sfa.flowTable.RegisterUpdated(sfa.asyncFlowPipeline, time.Duration(cfgFlowtable_update)*time.Second)

	for sfa.running.Load() == true {
		select {
		case now := <-sfa.flowTable.GetExpireTicker():
			sfa.flowTable.Expire(now)
		case now := <-sfa.flowTable.GetUpdatedTicker():
			sfa.flowTable.Updated(now)
		case <-sfa.flush:
			sfa.flowTable.ExpireNow()
			sfa.flushDone <- true
		default:
			sfa.feedFlowTable(conn)
		}
	}

	return nil
}
Exemplo n.º 4
0
func (probe *SFlowProbe) Start() error {
	probe.wg.Add(1)
	defer probe.wg.Done()

	var buf [maxDgramSize]byte

	addr := net.UDPAddr{
		Port: probe.Port,
		IP:   net.ParseIP(probe.Addr),
	}
	conn, err := net.ListenUDP("udp", &addr)
	if err != nil {
		logging.GetLogger().Error("Unable to listen on port %d: %s", probe.Port, err.Error())
		return err
	}
	defer conn.Close()
	conn.SetDeadline(time.Now().Add(1 * time.Second))

	// start index/mac cache updater
	go probe.cacheUpdater()

	flowtable := flow.NewFlowTable()
	cfgFlowtable_expire, err := config.GetConfig().Section("agent").Key("flowtable_expire").Int()
	if err != nil || cfgFlowtable_expire < 1 {
		logging.GetLogger().Error("Config flowTable_expire invalid value ", cfgFlowtable_expire, err.Error())
		return err
	}
	go flowtable.AsyncExpire(probe.flowExpire, time.Duration(cfgFlowtable_expire)*time.Minute)

	for probe.running.Load() == true {
		_, _, err := conn.ReadFromUDP(buf[:])
		if err != nil {
			conn.SetDeadline(time.Now().Add(1 * time.Second))
			continue
		}

		p := gopacket.NewPacket(buf[:], layers.LayerTypeSFlow, gopacket.Default)
		sflowLayer := p.Layer(layers.LayerTypeSFlow)
		sflowPacket, ok := sflowLayer.(*layers.SFlowDatagram)
		if !ok {
			continue
		}

		if sflowPacket.SampleCount > 0 {
			for _, sample := range sflowPacket.FlowSamples {
				flows := flow.FLowsFromSFlowSample(flowtable, &sample, probe.getProbePath(sample.InputInterface))

				logging.GetLogger().Debug("%d flows captured", len(flows))

				flowtable.Update(flows)

				if probe.FlowMappingPipeline != nil {
					probe.FlowMappingPipeline.Enhance(flows)
				}

				if probe.AnalyzerClient != nil {
					// FIX(safchain) add flow state cache in order to send only flow changes
					// to not flood the analyzer
					probe.AnalyzerClient.SendFlows(flows)
				}
			}
		}
	}

	return nil
}
Exemplo n.º 5
0
func NewServer(addr string, port int, router *mux.Router, embedEtcd bool) (*Server, error) {
	backend, err := graph.BackendFromConfig()
	if err != nil {
		return nil, err
	}

	g, err := graph.NewGraph(backend)
	if err != nil {
		return nil, err
	}

	tserver := topology.NewServer("analyzer", g, addr, port, router)
	tserver.RegisterStaticEndpoints()
	tserver.RegisterRPCEndpoints()

	var etcd *storage.EmbeddedEtcd
	if embedEtcd {
		if etcd, err = storage.NewEmbeddedEtcdFromConfig(); err != nil {
			return nil, err
		}
	}

	alertmgr, err := graph.NewAlertFromConfig(g, router)
	if err != nil {
		return nil, err
	}
	alertmgr.RegisterRPCEndpoints()

	gserver, err := graph.NewServerFromConfig(g, alertmgr, router)
	if err != nil {
		return nil, err
	}

	gfe, err := mappings.NewGraphFlowEnhancer(g)
	if err != nil {
		return nil, err
	}

	pipeline := mappings.NewFlowMappingPipeline(gfe)

	flowtable := flow.NewFlowTable()

	server := &Server{
		Addr:                addr,
		Port:                port,
		Router:              router,
		TopoServer:          tserver,
		GraphServer:         gserver,
		FlowMappingPipeline: pipeline,
		FlowTable:           flowtable,
		EmbeddedEtcd:        etcd,
	}
	server.RegisterRPCEndpoints()
	cfgFlowtable_expire := config.GetConfig().GetInt("analyzer.flowtable_expire")
	if cfgFlowtable_expire < 1 {
		logging.GetLogger().Errorf("Config flowTable_expire invalid value %d : %s", cfgFlowtable_expire, err.Error())
		return nil, err
	}
	go flowtable.AsyncExpire(server.flowExpire, time.Duration(cfgFlowtable_expire)*time.Minute)

	return server, nil
}
Exemplo n.º 6
0
func (sfa *SFlowAgent) start() error {
	sfa.wg.Add(1)
	defer sfa.wg.Done()

	var buf [maxDgramSize]byte

	addr := net.UDPAddr{
		Port: sfa.Port,
		IP:   net.ParseIP(sfa.Addr),
	}
	conn, err := net.ListenUDP("udp", &addr)
	if err != nil {
		logging.GetLogger().Errorf("Unable to listen on port %d: %s", sfa.Port, err.Error())
		return err
	}
	defer conn.Close()
	conn.SetDeadline(time.Now().Add(1 * time.Second))

	flowtable := flow.NewFlowTable()
	cfgFlowtable_expire := config.GetConfig().GetInt("agent.flowtable_expire")
	go flowtable.AsyncExpire(sfa.flowExpire, time.Duration(cfgFlowtable_expire)*time.Minute)

	for sfa.running.Load() == true {
		_, _, err := conn.ReadFromUDP(buf[:])
		if err != nil {
			conn.SetDeadline(time.Now().Add(1 * time.Second))
			continue
		}

		p := gopacket.NewPacket(buf[:], layers.LayerTypeSFlow, gopacket.Default)
		sflowLayer := p.Layer(layers.LayerTypeSFlow)
		sflowPacket, ok := sflowLayer.(*layers.SFlowDatagram)
		if !ok {
			continue
		}

		if sflowPacket.SampleCount > 0 {
			for _, sample := range sflowPacket.FlowSamples {
				var probePath string
				if sfa.ProbePathGetter != nil {
					probePath = sfa.ProbePathGetter.GetProbePath(int64(sample.InputInterface))
				}

				flows := flow.FLowsFromSFlowSample(flowtable, &sample, probePath)

				logging.GetLogger().Debugf("%d flows captured at %v", len(flows), probePath)

				flowtable.Update(flows)

				if sfa.FlowMappingPipeline != nil {
					sfa.FlowMappingPipeline.Enhance(flows)
				}

				if sfa.AnalyzerClient != nil {
					// FIX(safchain) add flow state cache in order to send only flow changes
					// to not flood the analyzer
					sfa.AnalyzerClient.SendFlows(flows)
				}
			}
		}
	}

	return nil
}
Exemplo n.º 7
0
func NewServerFromConfig() (*Server, error) {
	embedEtcd := config.GetConfig().GetBool("etcd.embedded")

	backend, err := graph.BackendFromConfig()
	if err != nil {
		return nil, err
	}

	g, err := graph.NewGraph(backend)
	if err != nil {
		return nil, err
	}

	httpServer, err := shttp.NewServerFromConfig("analyzer")
	if err != nil {
		return nil, err
	}

	api.RegisterTopologyApi("analyzer", g, httpServer)

	var etcdServer *etcd.EmbeddedEtcd
	if embedEtcd {
		if etcdServer, err = etcd.NewEmbeddedEtcdFromConfig(); err != nil {
			return nil, err
		}
	}

	etcdClient, err := etcd.NewEtcdClientFromConfig()
	if err != nil {
		return nil, err
	}

	apiServer, err := api.NewApi(httpServer, etcdClient.KeysApi)
	if err != nil {
		return nil, err
	}

	alertManager := alert.NewAlertManager(g, apiServer.GetHandler("alert"))
	if err != nil {
		return nil, err
	}

	aserver, err := alert.NewServerFromConfig(alertManager, httpServer)
	if err != nil {
		return nil, err
	}

	gserver, err := graph.NewServerFromConfig(g, httpServer)
	if err != nil {
		return nil, err
	}

	gfe := mappings.NewGraphFlowEnhancer(g)
	ofe := mappings.NewOvsFlowEnhancer(g)

	pipeline := mappings.NewFlowMappingPipeline(gfe, ofe)

	flowtable := flow.NewFlowTable()

	server := &Server{
		HTTPServer:          httpServer,
		GraphServer:         gserver,
		AlertServer:         aserver,
		FlowMappingPipeline: pipeline,
		FlowTable:           flowtable,
		EmbeddedEtcd:        etcdServer,
	}
	server.SetStorageFromConfig()

	api.RegisterFlowApi("analyzer", flowtable, server.Storage, httpServer)

	cfgFlowtable_expire := config.GetConfig().GetInt("analyzer.flowtable_expire")
	flowtable.RegisterExpire(server.flowExpireUpdate, time.Duration(cfgFlowtable_expire)*time.Second)
	cfgFlowtable_update := config.GetConfig().GetInt("analyzer.flowtable_update")
	flowtable.RegisterUpdated(server.flowExpireUpdate, time.Duration(cfgFlowtable_update)*time.Second)

	return server, nil
}