Example #1
0
func NewTCPJSONHandler(a *giles.Archiver, addPort, queryPort, subscribePort int) *TCPJSONHandler {
	var err error
	t := &TCPJSONHandler{a: a, errors: make(chan error)}

	t.addAddr, err = net.ResolveTCPAddr("tcp", ":"+strconv.Itoa(addPort))
	if err != nil {
		log.Fatalf("Error resolving TCPJSON address %v (%v)", addPort, err)
	}
	t.addConn, err = net.ListenTCP("tcp", t.addAddr)
	if err != nil {
		log.Fatalf("Error listening to TCP (%v)", err)
	}

	t.queryAddr, err = net.ResolveTCPAddr("tcp", ":"+strconv.Itoa(queryPort))
	if err != nil {
		log.Fatalf("Error resolving TCPJSON address %v (%v)", queryPort, err)
	}
	t.queryConn, err = net.ListenTCP("tcp", t.queryAddr)
	if err != nil {
		log.Fatalf("Error listening to TCP (%v)", err)
	}

	t.subscribeAddr, err = net.ResolveTCPAddr("tcp", ":"+strconv.Itoa(subscribePort))
	if err != nil {
		log.Fatalf("Error resolving TCPJSON address %v (%v)", subscribePort, err)
	}
	t.subscribeConn, err = net.ListenTCP("tcp", t.subscribeAddr)
	if err != nil {
		log.Fatalf("Error listening to TCP (%v)", err)
	}

	return t
}
func server_thread(wg_server *sync.WaitGroup) {
	defer wg_server.Done()
	server_state = RUNNING
	logger.Println("Launching server...")
	runtime.GOMAXPROCS(runtime.NumCPU())
	tsp_task_manager.CreateTaskManager()

	// listen workers
	laddr, err := net.ResolveTCPAddr("tcp", "127.0.0.1:5000")
	if nil != err {
		logger.Printf("ResolveTCPAddr (worker) error: %v\n", err)
		server_state = STOPPED
		return
	}
	listener, err := net.ListenTCP("tcp", laddr)
	if err != nil {
		logger.Printf("workers listen error: %v\n", err)
		server_state = STOPPED
		return
	}
	var wg_workers_accept sync.WaitGroup
	wg_workers_accept.Add(1)
	go accept_workers(listener, &wg_workers_accept)

	// listen clients
	laddr, err = net.ResolveTCPAddr("tcp", "127.0.0.1:6000")
	if nil != err {
		logger.Printf("ResolveTCPAddr (client) error: %v\n", err)
		server_state = STOPPED
		return
	}
	listener, err = net.ListenTCP("tcp", laddr)
	if err != nil {
		logger.Printf("clients listen error: %v\n", err)
		server_state = STOPPED
		return
	}
	var wg_clients_accept sync.WaitGroup
	wg_clients_accept.Add(1)
	go accept_clients(listener, &wg_clients_accept)
	logger.Println("Server work is started")

	// listen commands
	for {
		cmd := <-ch_cmd
		if cmd == SERVER_QUIT {
			// server quit
			server_state = STOPPED
			wg_workers_accept.Wait()
			wg_clients_accept.Wait()
			logger.Println("Server work is finished")
			return
		}
	}
}
Example #3
0
func main() {
	addr := ":8053"
	at, _ := net.ResolveTCPAddr("tcp6", addr)
	_, e := net.ListenTCP("tcp6", at)
	if e != nil {
		fmt.Printf("%s\n", e.Error())
	}
	au, _ := net.ResolveTCPAddr("tcp4", addr)
	_, e = net.ListenTCP("tcp4", au)
	if e != nil {
		fmt.Printf("%s\n", e.Error())
	}
}
Example #4
0
func (fileServer *FileServer) startServer() {
	tcpaddr, err := net.ResolveTCPAddr("tcp", "localhost:"+strconv.Itoa(fileServer.Port))
	fileServer.check(err)
	if fileServer.Rf.Isdown == 1 {
		fileServer.Rf.Isdown = 0
		fmt.Printf("Node %d up again\n", fileServer.Rf.Id())
		fileServer.Rf.Up()
		if len(fileServer.NeedClose) != 0 {
			<-fileServer.NeedClose
		}
		if len(fileServer.CloseAll) != 0 {
			<-fileServer.CloseAll
		}
		time.Sleep(10 * time.Second)
	}
	tcp_acceptor, err := net.ListenTCP("tcp", tcpaddr)
	fileServer.check(err)
	defer tcp_acceptor.Close()
	go fileServer.backEnd()
	go fileServer.Rf.ProcessEvents()
	for {
		if len(fileServer.CloseAll) != 0 {
			fileServer.Rf.Shutdown()
			break
		} else if fileServer.Rf.IsClosedRaft() {
			break
		} else {
			for len(fileServer.CloseAll) == 0 && fileServer.Rf.LeaderId() != fileServer.Id {
				if tcp_acceptor != nil {
					tcp_acceptor.Close()
					tcp_acceptor = nil
				}
				time.Sleep(1 * time.Second)
			}
			if len(fileServer.CloseAll) != 0 {
				fileServer.Rf.Shutdown()
				break
			} else if fileServer.Rf.IsClosedRaft() {
				break
			}
			if tcp_acceptor == nil {
				tcp_acceptor, err = net.ListenTCP("tcp", tcpaddr)
				fileServer.check(err)
			}
			tcp_conn, err := tcp_acceptor.AcceptTCP()
			fileServer.check(err)
			go fileServer.serve(tcp_conn)
		}
	}
	tcp_acceptor.Close()
}
Example #5
0
func setupSocket(socket_version int, service string, config_obj *read_config.ReadConfig) error {

	socket_type := "tcp4"

	if socket_version == 6 {
		socket_type = "tcp6"
	}

	tcpAddr, err := net.ResolveTCPAddr(socket_type, service)
	common.CheckError(err)

	listener, err := net.ListenTCP("tcp", tcpAddr)

	if err != nil {
		return err
	}

	for {
		if conn, err := listener.Accept(); err != nil {
			continue
		} else {
			// run as a goroutine
			go handleClient(conn, config_obj)
		}
	}

	return nil
}
Example #6
0
//----------------------------------------------- HUB start
func HubStart() {
	log.Println("Starting HUB")

	// start db
	StartDB()

	// data init
	startup_work()

	// Listen
	service := ":9090"
	config := cfg.Get()

	if config["hub_service"] != "" {
		service = config["hub_service"]
	}

	log.Println("Hub Service:", service)
	tcpAddr, err := net.ResolveTCPAddr("tcp4", service)
	checkError(err)

	listener, err := net.ListenTCP("tcp", tcpAddr)
	checkError(err)

	for {
		conn, err := listener.Accept()

		if err != nil {
			continue
		}
		go handleClient(conn)
	}
}
Example #7
0
// ListenAndServe starts a nameserver on the configured address in *Server.
func (srv *Server) ListenAndServe() error {
	addr := srv.Addr
	if addr == "" {
		addr = ":domain"
	}
	switch srv.Net {
	case "tcp", "tcp4", "tcp6":
		a, e := net.ResolveTCPAddr(srv.Net, addr)
		if e != nil {
			return e
		}
		l, e := net.ListenTCP(srv.Net, a)
		if e != nil {
			return e
		}
		return srv.serveTCP(l)
	case "udp", "udp4", "udp6":
		a, e := net.ResolveUDPAddr(srv.Net, addr)
		if e != nil {
			return e
		}
		l, e := net.ListenUDP(srv.Net, a)
		if e != nil {
			return e
		}
		return srv.serveUDP(l)
	}
	return &Error{err: "bad network"}
}
Example #8
0
func listen(healthCheckAddr chan net.Addr) error {
	addr, err := generateHealthCheckAddr()
	if err != nil {
		return err
	}

	listener, err := net.ListenTCP("tcp", addr.(*net.TCPAddr))
	if err != nil {
		return err
	}

	healthCheckAddr <- listener.Addr()

	for {
		conn, err := listener.AcceptTCP()
		if err != nil {
			log.Fatal(err)
		}

		go func() {
			defer conn.Close()
			if !readHealth(conn) || !sendHealth(conn) {
				// Connection is dead with client
				return
			}
		}()
	}

	return nil
}
Example #9
0
// ListenTCP announces on the local network address laddr. The network net must
// be: "tcp", "tcp4" or "tcp6". It returns an inherited net.Listener for the
// matching network and address, or creates a new one using net.ListenTCP.
func (n *Net) ListenTCP(nett string, laddr *net.TCPAddr) (*net.TCPListener, error) {
	if err := n.inherit(); err != nil {
		return nil, err
	}

	n.mutex.Lock()
	defer n.mutex.Unlock()

	// look for an inherited listener
	for i, l := range n.inherited {
		if l == nil { // we nil used inherited listeners
			continue
		}
		if isSameAddr(l.Addr(), laddr) {
			n.inherited[i] = nil
			n.active = append(n.active, l)
			return l.(*net.TCPListener), nil
		}
	}

	// make a fresh listener
	l, err := net.ListenTCP(nett, laddr)
	if err != nil {
		return nil, err
	}
	n.active = append(n.active, l)
	return l, nil
}
Example #10
0
func (s *Server) init() {
	if s.ReadBufferSize == 0 {
		s.ReadBufferSize = defaultReadBufferSize
	}
	if s.WriteBufferSize == 0 {
		s.WriteBufferSize = defaultWriteBufferSize
	}
	if s.OSReadBufferSize == 0 {
		s.OSReadBufferSize = defaultOSReadBufferSize
	}
	if s.OSWriteBufferSize == 0 {
		s.OSWriteBufferSize = defaultOSWriteBufferSize
	}

	listenAddr, err := net.ResolveTCPAddr("tcp", s.ListenAddr)
	if err != nil {
		log.Fatalf("Cannot resolve listenAddr=[%s]: [%s]", s.ListenAddr, err)
	}
	s.listenSocket, err = net.ListenTCP("tcp", listenAddr)
	if err != nil {
		log.Fatalf("Cannot listen for ListenAddr=[%s]: [%s]", listenAddr, err)
	}
	s.done = &sync.WaitGroup{}
	s.done.Add(1)
}
Example #11
0
func (server *tcpServer) Start() error {
	port := portStart
	for {
		tcpAddr, err := net.ResolveTCPAddr("tcp4", ":"+strconv.Itoa(port))
		if err != nil {
			return err
		}

		server.listener, err = net.ListenTCP("tcp", tcpAddr)
		if err == nil {
			break
		}

		if port > portEnd {
			return errors.New(fmt.Sprintf("Port number exceedes %v", portEnd))
		}

		port++
	}

	//fmt.Printf("PortNumber = %v\n", port)
	server.port = strconv.Itoa(port)

	go func() {
		for {
			acceptNext := server.acceptCycle()
			if !acceptNext {
				return
			}
		}
	}()

	return nil
}
Example #12
0
func runMetadataService(cmd *cobra.Command, args []string) (exit int) {
	signal.Notify(exitCh, syscall.SIGINT, syscall.SIGTERM)
	stderr.Print("metadata service starting...")

	unixl, err := unixListener()
	if err != nil {
		stderr.Error(err)
		return 1
	}
	defer unixl.Close()

	tcpl, err := net.ListenTCP("tcp4", &net.TCPAddr{Port: flagListenPort})
	if err != nil {
		stderr.PrintE(fmt.Sprintf("error listening on port %v", flagListenPort), err)
		return 1
	}
	defer tcpl.Close()

	if err := initCrypto(); err != nil {
		stderr.Error(err)
		return 1
	}

	go runRegistrationServer(unixl)
	go runPublicServer(tcpl)

	stderr.Print("metadata service running...")

	<-exitCh

	stderr.Print("metadata service exiting...")

	return
}
Example #13
0
func (r *SrsServer) Serve() error {
	// too many open files will thows a panic.
	addr, err := net.ResolveTCPAddr("tcp", r.addr)
	if err != nil {
		glog.Errorf("resolve listen address failed, err=%v", err)
		return fmt.Errorf("resolve listen address failed, err=%v", err)
	}

	var listener *net.TCPListener
	listener, err = net.ListenTCP("tcp", addr)
	if err != nil {
		glog.Errorf("listen failed, err=%v", err)
		return fmt.Errorf("listen failed, err=%v", err)
	}
	defer listener.Close()
	for {
		glog.Info("listener ready to accept client")
		conn, err := listener.AcceptTCP()
		if err != nil {
			glog.Errorf("accept client failed, err=%v", err)
			return fmt.Errorf("accept client failed, err=%v", err)
		}
		glog.Info("TCP Connected")

		go r.serve(conn)
	}
}
func testPort() string {
	add, _ := net.ResolveTCPAddr("tcp", ":0")
	l, _ := net.ListenTCP("tcp", add)
	defer l.Close()
	port := strconv.Itoa(l.Addr().(*net.TCPAddr).Port)
	return port
}
Example #15
0
func (r *resolver) SetupFunc(port int) func() {
	return (func() {
		var err error

		// DNS operates primarily on UDP
		addr := &net.UDPAddr{
			IP:   net.ParseIP(r.listenAddress),
			Port: port,
		}

		r.conn, err = net.ListenUDP("udp", addr)
		if err != nil {
			r.err = fmt.Errorf("error in opening name server socket %v", err)
			return
		}

		// Listen on a TCP as well
		tcpaddr := &net.TCPAddr{
			IP:   net.ParseIP(r.listenAddress),
			Port: port,
		}

		r.tcpListen, err = net.ListenTCP("tcp", tcpaddr)
		if err != nil {
			r.err = fmt.Errorf("error in opening name TCP server socket %v", err)
			return
		}
		r.err = nil
	})
}
Example #16
0
func NewTCPServer(t lotf.Tail, addr *net.TCPAddr) (*StreamServer, error) {
	listener, err := net.ListenTCP("tcp", addr)
	if err != nil {
		return nil, err
	}
	return &StreamServer{t, listener, make(chan bool, 1)}, nil
}
Example #17
0
func (ch *HandleClient) run() {

	ch.ExitWaitGr.Add(2)

	ch.raftnode.StartRaftNodes()

	address, _ := net.ResolveTCPAddr("tcp", ch.Address+":"+strconv.Itoa(ch.Port))

	accept, _ := net.ListenTCP("tcp", address)

	go ch.handleCommit()

	go func() {

		for {
			tcp_conn, _ := accept.AcceptTCP()

			ch.ExitWaitGr.Add(1)
			go ch.serve(tcp_conn)
		}

		ch.ExitWaitGr.Done()

	}()

}
Example #18
0
func main() {

	logIt("SETUP", "Starting...")

	addr, err := net.ResolveTCPAddr("ip4", ":4848")
	errorCheck(err, "Problem resolving TCP address")

	listen, err := net.ListenTCP("tcp", addr)
	errorCheck(err, "TCP listening error")

	logIt("SETUP", "Ready.")

	for {
		connection, err := listen.Accept()
		if err != nil {
			continue
		}
		logIt("CONNECTION", "Got new connection")

		go newClient(connection)

	}

	os.Exit(0)
}
Example #19
0
func (cli *Client) listen() {
	defer cli.wg.Done()

	ln, err := net.ListenTCP("tcp", cli.app.laddr)
	if err != nil {
		Panic("listen failed:%v", err)
	}

	for {
		conn, err := ln.AcceptTCP()
		if err != nil {
			Log("acceept failed:%s", err.Error())
			if opErr, ok := err.(*net.OpError); ok {
				if !opErr.Temporary() {
					break
				}
			}
			continue
		}
		Info("new connection from %v", conn.RemoteAddr())
		hub := cli.fetchHub()
		if hub == nil {
			Error("no active hub")
			conn.Close()
			continue
		}

		conn.SetKeepAlive(true)
		conn.SetKeepAlivePeriod(time.Second * 60)
		go cli.handleConn(hub, conn)
	}
}
Example #20
0
func CreateListener(flags *TorrentFlags) (listener net.Listener, externalPort int, err error) {
	nat, err := CreatePortMapping(flags)
	if err != nil {
		err = fmt.Errorf("Unable to create NAT: %v", err)
		return
	}
	listenPort := flags.Port
	if nat != nil {
		var external net.IP
		if external, err = nat.GetExternalAddress(); err != nil {
			err = fmt.Errorf("Unable to get external IP address from NAT: %v", err)
			return
		}
		log.Println("External ip address: ", external)
		if listenPort, err = chooseListenPort(nat, listenPort); err != nil {
			log.Println("Could not choose listen port.", err)
			log.Println("Peer connectivity will be affected.")
		}
	}
	listener, err = net.ListenTCP("tcp", &net.TCPAddr{Port: listenPort})
	if err != nil {
		log.Fatal("Listen failed:", err)
	}
	log.Println("Listening for peers on port:", listenPort)
	externalPort = listenPort
	return
}
// Main function
func main() {

	loadConfig()
	loadDict3()
	fingertable = make(map[int]NodeInfo)
	next = 0
	if entrypt == "null" {
		createChordRing()
	} else {
		joinChordRing(entrypt)
	}

	stabilize()
	check_predecessor()
	fixFingers()

	getDict3FromSuccessor()

	dic3 := new(DIC3)
	rpc.Register(dic3)

	tcpAddr, err := net.ResolveTCPAddr(protocol, port)
	checkError(err)
	fmt.Println("Server started........")
	listener, err := net.ListenTCP(protocol, tcpAddr)
	checkError(err)

	for {
		conn, err := listener.Accept()
		if err != nil {
			continue
		}
		jsonrpc.ServeConn(conn)
	}
}
Example #22
0
func main() {

	flag.Parse() // Scan the arguments list

	if *versionFlag {
		fmt.Println("Version:", APP_VERSION)
	}

	service := ":" + strconv.FormatInt(*serverPort, 10)
	tcpAddr, err := net.ResolveTCPAddr("ip4", service)
	checkError(err)

	listener, err := net.ListenTCP("tcp", tcpAddr)
	checkError(err)

	for {
		conn, err := listener.Accept()
		if err != nil {
			continue
		}
		stop := false
		for !stop {
			buf := make([]byte, 100)
			n, err := conn.Read(buf[0:])
			if err != nil {
				stop = true
			}
			fmt.Fprintf(conn, "HTTP/1.0 200 OK\r\n\r\n")
			os.Stdout.Write(buf[0:n])
		}
		conn.Close()
	}
}
Example #23
0
func (self *TcpInput) Init(pcf *plugins.PluginCommonConfig, conf toml.Primitive) (err error) {

	log.Println("TcpInput Init")
	self.common = pcf
	self.config = &TcpInputConfig{
		Net: "tcp",
	}
	if err := toml.PrimitiveDecode(conf, self.config); err != nil {
		return fmt.Errorf("Can't unmarshal TcpInput config: %s", err)
	}
	address, err := net.ResolveTCPAddr(self.config.Net, self.config.Address)
	if err != nil {
		return fmt.Errorf("ResolveTCPAddress failed: %s\n", err.Error())
	}
	self.listener, err = net.ListenTCP(self.config.Net, address)
	if err != nil {
		return fmt.Errorf("ListenTCP failed: %s\n", err.Error())
	}
	// We're already listening, make sure we clean up if init fails later on.
	closeIt := true
	defer func() {
		if closeIt {
			self.listener.Close()
		}
	}()
	if self.config.KeepAlivePeriod != 0 {
		self.keepAliveDuration = time.Duration(self.config.KeepAlivePeriod) * time.Second
	}
	self.stopChan = make(chan bool)
	closeIt = false
	return nil
}
Example #24
0
func (me *ServerManager) setupListener(port int) {
	portStr := strconv.Itoa(port)
	addr, err := net.ResolveTCPAddr("tcp", "0.0.0.0:"+portStr)
	if err != nil {
		log.Print("Could not resolve port and listen address:", err)
		return
	}

	// listen on port
	go func() {
		l, err := net.ListenTCP("tcp", addr)
		if err != nil {
			log.Print("Could not listen for TCP connection:", err)
		} else {
			for {
				conn, err := l.AcceptTCP()
				if err != nil {
					log.Print("Could not accept TCP connection:", err)
				} else {
					// connection accepted

					// spinup machine
					me.Spinup()

					// close existing connection, not doing anything with it
					conn.Close()
				}
			}
		}
	}()
}
Example #25
0
func (this *SyslogProducer) startTCPServer() {
	Trace(this, "Starting TCP server")
	tcpAddr, err := net.ResolveTCPAddr("tcp", this.config.TCPAddr)
	if err != nil {
		panic(err)
	}

	listener, err := net.ListenTCP("tcp", tcpAddr)
	if err != nil {
		panic(err)
	}
	closeChannel := make(chan bool, 1)
	this.closeChannels = append(this.closeChannels, closeChannel)

	go func() {
		for {
			select {
			case <-closeChannel:
				return
			default:
			}
			connection, err := listener.Accept()
			if err != nil {
				return
			}

			this.scan(connection)
		}
	}()
	Infof(this, "Listening for messages at TCP %s", this.config.TCPAddr)
}
Example #26
0
// ListenOnLocalRandomPort returns a TCP listener on a random
// localhost port.
func ListenOnLocalRandomPort() (net.Listener, error) {
	ip, err := Localhost()
	if err != nil {
		return nil, err
	}
	return net.ListenTCP("tcp", &net.TCPAddr{IP: ip, Port: 0})
}
func accepts() {
	strPort := "localhost:" + strconv.Itoa(port)
	fmt.Println("open port", strPort)
	addr, err := net.ResolveTCPAddr("tcp4", strPort)
	l, err := net.ListenTCP("tcp4", addr)
	if err != nil {
		fmt.Println(">>>> listen failed: ", err.Error())
		return
	}
	addr = nil
	for {
		fmt.Println("Accept ready")
		session, err := l.AcceptTCP()
		if err != nil {
			//return
			fmt.Println("Accept error:", err.Error())
			continue
		}

		go session_process(session)
		session = nil
	}

	l = nil
}
Example #28
0
func Start() {

	tcpAddr, err := net.ResolveTCPAddr("tcp4", PORT)

	checkError(err)

	tcpListener, err := net.ListenTCP("tcp", tcpAddr)

	checkError(err)

	fmt.Printf("cool server start \n")

	for {

		conn, err := tcpListener.Accept()

		fmt.Printf("accpet one connection! \n")

		checkError(err)

		go ConnHandle(conn)

	}

}
Example #29
-1
func NewTestServer(t testing.TB, protocol uint8) *TestServer {
	laddr, err := net.ResolveTCPAddr("tcp", "127.0.0.1:0")
	if err != nil {
		t.Fatal(err)
	}

	listen, err := net.ListenTCP("tcp", laddr)
	if err != nil {
		t.Fatal(err)
	}

	headerSize := 8
	if protocol > protoVersion2 {
		headerSize = 9
	}

	srv := &TestServer{
		Address:    listen.Addr().String(),
		listen:     listen,
		t:          t,
		protocol:   protocol,
		headerSize: headerSize,
		quit:       make(chan struct{}),
	}

	go srv.serve()

	return srv
}
Example #30
-1
func ProxyRelay(port string, relays map[string]Relay) error {
	tcpAddr := net.TCPAddr{}
	tcpAddr.IP = net.ParseIP("127.0.0.1")
	tcpAddr.Port, _ = strconv.Atoi(port)
	ln, err := net.ListenTCP("tcp", &tcpAddr)
	if err != nil {
		msg := fmt.Sprintf("Proxy listener error on port %s: %s",
			port, err)
		LogWriter.Err(msg)
		return fmt.Errorf(msg)
	}
	msg := fmt.Sprintf("Started proxy listener on port: %s",
		port)
	LogWriter.Info(msg)
	defer ln.Close()
	for {
		conn, err := ln.AcceptTCP()
		if err != nil {
			msg := fmt.Sprintf("Error accepting TCP connection on port %s: %s",
				port, err)
			LogWriter.Err(msg)
			continue
		}
		conn.SetKeepAlive(true)
		if err != nil {
			msg := fmt.Sprintf("Error setting keep-alive on connection: %s",
				err)
			LogWriter.Err(msg)
		}
		go acceptClient(conn, relays)
	}
	return nil
}