示例#1
0
        /// <summary>Given a EdgeListener info and a list of addresses to advertise,
        /// returns an EdgeListener.</summary>
        protected EdgeListener CreateBaseEdgeListener(NodeConfig.EdgeListener el_info,
                                                      ApplicationNode node, IEnumerable addresses)
        {
            EdgeListener el   = null;
            int          port = el_info.port;

            if (el_info.type == "tcp")
            {
                try {
                    el = new TcpEdgeListener(port, addresses);
                } catch {
                    el = new TcpEdgeListener(0, addresses);
                }
            }
            else if (el_info.type == "udp")
            {
                try {
                    el = new UdpEdgeListener(port, addresses);
                } catch {
                    el = new UdpEdgeListener(0, addresses);
                }
            }
            else if (el_info.type == "function")
            {
                port = port == 0 ? (new Random()).Next(1024, 65535) : port;
                el   = new FunctionEdgeListener(port, 0, null);
            }
            else
            {
                throw new Exception("Unrecognized transport: " + el_info.type);
            }
            return(el);
        }
示例#2
0
        /// <summary>Given a EdgeListener info and a list of addresses to advertise,
        /// returns an EdgeListener.</summary>
        protected EdgeListener CreateBaseEdgeListener(NodeConfig.EdgeListener el_info,
                                                      ApplicationNode node, IEnumerable addresses)
        {
            EdgeListener el   = null;
            int          port = el_info.port;

            if (el_info.type == "tcp")
            {
                try {
                    el = new TcpEdgeListener(port, addresses);
                } catch {
                    el = new TcpEdgeListener(0, addresses);
                }
            }
            else if (el_info.type == "udp")
            {
                try {
                    el = new UdpEdgeListener(port, addresses);
                } catch {
                    el = new UdpEdgeListener(0, addresses);
                }
            }
            else if (el_info.type == "function")
            {
                port = port == 0 ? (new Random()).Next(1024, 65535) : port;
                el   = new FunctionEdgeListener(port, 0, null);
            }
            else if (el_info.type == "xmpp")
            {
                if (!_node_config.XmppServices.Enabled)
                {
                    throw new Exception("XmppServices must be enabled to use XmppEL");
                }
                el = new XmppEdgeListener(XmppService);
                node.Node.AddTADiscovery(new XmppDiscovery(node.Node, XmppService, node.Node.Realm));
            }
            else
            {
                throw new Exception("Unrecognized transport: " + el_info.type);
            }
            return(el);
        }
示例#3
0
文件: BasicNode.cs 项目: hseom/brunet
 /// <summary>Given a EdgeListener info and a list of addresses to advertise,
 /// returns an EdgeListener.</summary>
 protected EdgeListener CreateBaseEdgeListener(NodeConfig.EdgeListener el_info,
     ApplicationNode node, IEnumerable addresses)
 {
   EdgeListener el = null;
   int port = el_info.port;
   if(el_info.type == "tcp") {
     try {
       el = new TcpEdgeListener(port, addresses);
     } catch {
       el = new TcpEdgeListener(0, addresses);
     }
   } else if(el_info.type == "udp") {
     try {
       el = new UdpEdgeListener(port, addresses);
     } catch {
       el = new UdpEdgeListener(0, addresses);
     }
   } else if(el_info.type == "function") {
     port = port == 0 ? (new Random()).Next(1024, 65535) : port;
     el = new FunctionEdgeListener(port, 0, null);
   } else if(el_info.type == "xmpp") {
     if(!_node_config.XmppServices.Enabled) {
       throw new Exception("XmppServices must be enabled to use XmppEL");
     }
     el = new XmppEdgeListener(XmppService);
     node.Node.AddTADiscovery(new XmppDiscovery(node.Node, XmppService, node.Node.Realm));
   } else {
     throw new Exception("Unrecognized transport: " + el_info.type);
   }
   return el;
 }
示例#4
0
    public static int Main(string[] args)
    {
        /**
         * Get the arguments
         */
        if (args.Length < 2)
        {
            Console.Error.WriteLine("usage: SNodeExample.exe [tcp|udp] port remota_ta0 remote_ta1 ...");
            return(0);
        }

        /**
         * Make the edge listener:
         */
        EdgeListener el   = null;
        int          port = Int32.Parse(args[1]);

        if (args[0].ToLower() == "tcp")
        {
            el = new TcpEdgeListener(port);
        }
        else if (args[0].ToLower() == "udp")
        {
            el = new UdpEdgeListener(port);
        }

        /**
         * Create a random address for our node.
         * Some other application might want to select the address
         * a particular way, or reuse a previously selected random
         * address.  If the addresses are not random (or the output
         * of secure hashes) the network might not behave correctly.
         */
        RandomNumberGenerator rng     = new RNGCryptoServiceProvider();
        AHAddress             tmp_add = new AHAddress(rng);

        Console.WriteLine("Address: {0}", tmp_add);

        /**
         * Make the node that lives in a particular
         * using Brunet.Messaging;
         * namespace (or realm) called "testspace"
         */
        Node          tmp_node = new StructuredNode(tmp_add, "testspace");
        ReqrepManager rrman    = tmp_node.Rrm;
        ReqrepExample irh      = new ReqrepExample();

        tmp_node.GetTypeSource(PType.Protocol.Chat).Subscribe(irh, tmp_node);

        /**
         * Add the EdgeListener
         */
        tmp_node.AddEdgeListener(el);

        /**
         * Tell the node who it can connect to:
         */
        for (int i = 2; i < args.Length; i++)
        {
            tmp_node.RemoteTAs.Add(TransportAddressFactory.CreateInstance(args[i]));
        }

        /**
         * Now we connect
         */
        tmp_node.Connect();
        Console.WriteLine("Connected");

        /**
         * In a real application, we would create some IAHPacketHandler
         * objects and do:
         * tmp_node.Subscribe( )
         * finally, we could send packets using tmp_node.Send( ) or
         * tmp_node.SendTo( )
         */
        string msg = "";

        System.Text.Encoding coder = new System.Text.ASCIIEncoding();
        while (true)
        {
            Console.Write("To: ");
            msg = Console.ReadLine();
            if (msg == "q")
            {
                break;
            }
            Address dest = AddressParser.Parse(msg);
            while (msg != ".")
            {
                msg = Console.ReadLine();
                int    length  = coder.GetByteCount(msg);
                byte[] payload = new byte[length];
                coder.GetBytes(msg, 0, msg.Length, payload, 0);
                ISender sender = new AHSender(tmp_node, dest);
                rrman.SendRequest(sender, ReqrepManager.ReqrepType.Request,
                                  new CopyList(PType.Protocol.Chat, MemBlock.Reference(payload)),
                                  irh, null);
            }
        }

        return(1);
    }
示例#5
0
    /// <summary>Creates a Brunet.Node, the resulting node will be available in
    /// the class as _node.</summary>
    /// <remarks>The steps to creating a node are first constructing it with a
    /// namespace, optionally adding local ip addresses to bind to, specifying
    /// local end points, specifying remote end points, and finally registering
    /// the dht.</remarks>
    public virtual void CreateNode() {
      AHAddress address = null;
      try {
        address = (AHAddress) AddressParser.Parse(_node_config.NodeAddress);
      } catch {
        address = Utils.GenerateAHAddress();
      }

      _node = new StructuredNode(address, _node_config.BrunetNamespace);
      IEnumerable addresses = IPAddresses.GetIPAddresses(_node_config.DevicesToBind);

      if(_node_config.Security.Enabled) {
        if(_node_config.Security.SelfSignedCertificates) {
          SecurityPolicy.SetDefaultSecurityPolicy(SecurityPolicy.DefaultEncryptor,
              SecurityPolicy.DefaultAuthenticator, true);
        }

        byte[] blob = null;
        using(FileStream fs = File.Open(_node_config.Security.KeyPath, FileMode.Open)) {
          blob = new byte[fs.Length];
          fs.Read(blob, 0, blob.Length);
        }

        RSACryptoServiceProvider rsa_private = new RSACryptoServiceProvider();
        rsa_private.ImportCspBlob(blob);

        CertificateHandler ch = new CertificateHandler(_node_config.Security.CertificatePath);
        _bso = new ProtocolSecurityOverlord(_node, rsa_private, _node.Rrm, ch);
        _bso.Subscribe(_node, null);

        _node.GetTypeSource(SecurityOverlord.Security).Subscribe(_bso, null);
        _node.HeartBeatEvent += _bso.Heartbeat;

        if(_node_config.Security.TestEnable) {
          blob = rsa_private.ExportCspBlob(false);
          RSACryptoServiceProvider rsa_pub = new RSACryptoServiceProvider();
          rsa_pub.ImportCspBlob(blob);
          CertificateMaker cm = new CertificateMaker("United States", "UFL", 
              "ACIS", "David Wolinsky", "*****@*****.**", rsa_pub,
              "brunet:node:abcdefghijklmnopqrs");
          Certificate cacert = cm.Sign(cm, rsa_private);

          cm = new CertificateMaker("United States", "UFL", 
              "ACIS", "David Wolinsky", "*****@*****.**", rsa_pub,
              address.ToString());
          Certificate cert = cm.Sign(cacert, rsa_private);
          ch.AddCACertificate(cacert.X509);
          ch.AddSignedCertificate(cert.X509);
        }
      }

      EdgeListener el = null;
      foreach(NodeConfig.EdgeListener item in _node_config.EdgeListeners) {
        int port = item.port;
        if(item.type == "tcp") {
          try {
            el = new TcpEdgeListener(port, addresses);
          }
          catch {
            el = new TcpEdgeListener(0, addresses);
          }
        } else if(item.type == "udp") {
          try {
            el = new UdpEdgeListener(port, addresses);
          }
          catch {
            el = new UdpEdgeListener(0, addresses);
          }
        } else if(item.type == "function") {
          port = port == 0 ? (new Random()).Next(1024, 65535) : port;
          el = new FunctionEdgeListener(port, 0, null);
        } else {
          throw new Exception("Unrecognized transport: " + item.type);
        }
        if(_node_config.Security.SecureEdgesEnabled) {
          el = new SecureEdgeListener(el, _bso);
        }
        _node.AddEdgeListener(el);
      }

      ArrayList RemoteTAs = null;
      if(_node_config.RemoteTAs != null) {
        RemoteTAs = new ArrayList();
        foreach(String ta in _node_config.RemoteTAs) {
          RemoteTAs.Add(TransportAddressFactory.CreateInstance(ta));
        }
        _node.RemoteTAs = RemoteTAs;
      }

      ITunnelOverlap ito = null;
      /*
      if(_node_config.NCService.Enabled) {
        _ncservice = new NCService(_node, _node_config.NCService.Checkpoint);

        if (_node_config.NCService.OptimizeShortcuts) {
          _node.Ssco.TargetSelector = new VivaldiTargetSelector(_node, _ncservice);
        }
        ito = new NCTunnelOverlap(_ncservice);
      } else {
        ito = new SimpleTunnelOverlap();
      }
      */
      el = new Tunnel.TunnelEdgeListener(_node, ito);
      if(_node_config.Security.SecureEdgesEnabled) {
        _node.EdgeVerifyMethod = EdgeVerify.AddressInSubjectAltName;
        el = new SecureEdgeListener(el, _bso);
      }
      _node.AddEdgeListener(el);


      new TableServer(_node);
      _dht = new Dht(_node, 3, 20);
      _dht_proxy = new RpcDhtProxy(_dht, _node);
    }
示例#6
0
    public static void Main(string[] args)
    {
      if (args.Length < 3) {
        Console.WriteLine("Usage: edgetester.exe " +
                          "[client|server] [tcp|udp|function] port " +
                          "localhost|qubit|cantor|starsky|behnam|kupka)");
        return;
      }

      if( args.Length >= 5) {
        delay = Int32.Parse(args[4]);
      }

      EdgeFactory ef = new EdgeFactory();
      int port = System.Int16.Parse(args[2]);

      _threads = ArrayList.Synchronized(new ArrayList());
      EdgeListener el = null;
      if( args[1] == "function" ) {
        //This is a special case, it only works in one thread
        el = new FunctionEdgeListener(port);
        el.EdgeEvent += new EventHandler(HandleEdge);
        //Start listening:
        el.Start();
        ef.AddListener(el);
        el.CreateEdgeTo(
         TransportAddressFactory.CreateInstance("brunet.function://localhost:" + port),
          ClientLoop);
      }
      else if (args[0] == "server") {
        if (args[1] == "tcp") {
          el = new TcpEdgeListener(port);
        }
        else if (args[1] == "udp") {
          el = new UdpEdgeListener(port);
        }
        else {
          el = null;
        }
        el.EdgeEvent += new EventHandler(HandleEdge);
//Start listening:
        el.Start();
        _el = el;
        Console.WriteLine("Press Q to quit");
        Console.ReadLine();
        el.Stop();
      }
      else if (args[0] == "client") {
        TransportAddress ta = null;
        if (args[1] == "tcp") {
          el = new TcpEdgeListener(port + 1);
        }
        else if (args[1] == "udp") {
          el = new UdpEdgeListener(port + 1);
        }
        else {
          el = null;
        }
        ef.AddListener(el);
        _el = el;
        string uri = "brunet." + args[1] + "://" + NameToIP(args[3]) + ":" + port;
        ta = TransportAddressFactory.CreateInstance(uri);
        System.Console.WriteLine("Making edge to {0}\n", ta.ToString());
        el.Start();
        ef.CreateEdgeTo(ta, ClientLoop);
      }
    }
示例#7
0
  public static int Main(string[] args) {

    /**
     * Get the arguments
     */
    if( args.Length < 2 ) {
      Console.Error.WriteLine("usage: SNodeExample.exe [tcp|udp] port remota_ta0 remote_ta1 ...");
      return 0;
    }

    /**
     * Make the edge listener:
     */
    EdgeListener el = null;
    int port = Int32.Parse( args[1] );
    if( args[0].ToLower() == "tcp" ) {
      el = new TcpEdgeListener(port);
    }
    else if( args[0].ToLower() == "udp" ) {
      el = new UdpEdgeListener(port);
    }
    /**
     * Create a random address for our node.
     * Some other application might want to select the address
     * a particular way, or reuse a previously selected random
     * address.  If the addresses are not random (or the output
     * of secure hashes) the network might not behave correctly.
     */
    RandomNumberGenerator rng = new RNGCryptoServiceProvider();
    AHAddress tmp_add = new AHAddress(rng);
    Console.WriteLine("Address: {0}", tmp_add);
    /**
     * Make the node that lives in a particular
using Brunet.Messaging;
     * namespace (or realm) called "testspace"
     */
    Node tmp_node = new StructuredNode(tmp_add, "testspace");
    ReqrepManager rrman = tmp_node.Rrm;
    ReqrepExample irh = new ReqrepExample();
    tmp_node.GetTypeSource(PType.Protocol.Chat).Subscribe(irh, tmp_node);
    /**
     * Add the EdgeListener
     */
    tmp_node.AddEdgeListener( el );
    /**
     * Tell the node who it can connect to:
     */
    for(int i = 2; i < args.Length; i++) {
      tmp_node.RemoteTAs.Add( TransportAddressFactory.CreateInstance( args[i] ) );
    }
    /**
     * Now we connect
     */
    tmp_node.Connect();
    Console.WriteLine("Connected");
    /**
     * In a real application, we would create some IAHPacketHandler
     * objects and do:
     * tmp_node.Subscribe( )
     * finally, we could send packets using tmp_node.Send( ) or
     * tmp_node.SendTo( )
     */
    string msg = "";
    System.Text.Encoding coder = new System.Text.ASCIIEncoding();
    while( true ) {
     Console.Write("To: ");
     msg = Console.ReadLine();
     if ( msg == "q" ) { break; }
     Address dest = AddressParser.Parse(msg);
     while( msg != "." ) {
      msg = Console.ReadLine();
      int length = coder.GetByteCount(msg);
      byte[] payload = new byte[length];
      coder.GetBytes(msg, 0, msg.Length, payload, 0);
      ISender sender = new AHSender(tmp_node, dest);
      rrman.SendRequest(sender, ReqrepManager.ReqrepType.Request,
                        new CopyList(PType.Protocol.Chat, MemBlock.Reference(payload)),
			irh , null);
     }
    }
	 
    return 1;
  }
示例#8
0
        public static void Main(string[] args)
        {
            if (args.Length < 3)
            {
                Console.WriteLine("Usage: edgetester.exe " +
                                  "[client|server] [tcp|udp|function] port " +
                                  "localhost|qubit|cantor|starsky|behnam|kupka)");
                return;
            }

            if (args.Length >= 5)
            {
                delay = Int32.Parse(args[4]);
            }

            EdgeFactory ef   = new EdgeFactory();
            int         port = System.Int16.Parse(args[2]);

            _threads = ArrayList.Synchronized(new ArrayList());
            EdgeListener el = null;

            if (args[1] == "function")
            {
                //This is a special case, it only works in one thread
                el            = new FunctionEdgeListener(port);
                el.EdgeEvent += new EventHandler(HandleEdge);
                //Start listening:
                el.Start();
                ef.AddListener(el);
                el.CreateEdgeTo(
                    TransportAddressFactory.CreateInstance("brunet.function://localhost:" + port),
                    ClientLoop);
            }
            else if (args[0] == "server")
            {
                if (args[1] == "tcp")
                {
                    el = new TcpEdgeListener(port);
                }
                else if (args[1] == "udp")
                {
                    el = new UdpEdgeListener(port);
                }
                else
                {
                    el = null;
                }
                el.EdgeEvent += new EventHandler(HandleEdge);
//Start listening:
                el.Start();
                _el = el;
                Console.WriteLine("Press Q to quit");
                Console.ReadLine();
                el.Stop();
            }
            else if (args[0] == "client")
            {
                TransportAddress ta = null;
                if (args[1] == "tcp")
                {
                    el = new TcpEdgeListener(port + 1);
                }
                else if (args[1] == "udp")
                {
                    el = new UdpEdgeListener(port + 1);
                }
                else
                {
                    el = null;
                }
                ef.AddListener(el);
                _el = el;
                string uri = "brunet." + args[1] + "://" + NameToIP(args[3]) + ":" + port;
                ta = TransportAddressFactory.CreateInstance(uri);
                System.Console.WriteLine("Making edge to {0}\n", ta.ToString());
                el.Start();
                ef.CreateEdgeTo(ta, ClientLoop);
            }
        }
示例#9
0
    /**
    <summary>Creates a Brunet.Node, the resulting node will be available in
    the class as _node.</summary>
    <remarks>The steps to creating a node are first constructing it with a
    namespace, optionally adding local ip addresses to bind to, specifying
    local end points, specifying remote end points, and finally registering
    the dht.</remarks>
    */
    public virtual void CreateNode(string type) {
      NodeConfig node_config = null;
      StructuredNode current_node = null;
      AHAddress address = null;
      ProtocolSecurityOverlord bso;

      if (type == "cache") {
        node_config = _c_node_config; //Node configuration file: the description of service that node provides
        address = (AHAddress) AddressParser.Parse(node_config.NodeAddress);
        current_node = new StructuredNode(address, node_config.BrunetNamespace); // DeetooNode consists of two Structured Nodes
        bso = _c_bso;
      }
      else if ( type == "query" ) {
        node_config = _q_node_config;
        address = (AHAddress) AddressParser.Parse(node_config.NodeAddress);
        current_node = new StructuredNode(address, node_config.BrunetNamespace);
        bso = _q_bso;
      }
      else {
        throw new Exception("Unrecognized node type: " + type);
      }
      IEnumerable addresses = IPAddresses.GetIPAddresses(node_config.DevicesToBind);

      if(node_config.Security.Enabled) {
        if(node_config.Security.SelfSignedCertificates) {
          SecurityPolicy.SetDefaultSecurityPolicy(SecurityPolicy.DefaultEncryptor,
              SecurityPolicy.DefaultAuthenticator, true);
        }

        byte[] blob = null;
        using(FileStream fs = File.Open(node_config.Security.KeyPath, FileMode.Open)) {
          blob = new byte[fs.Length];
          fs.Read(blob, 0, blob.Length);
        }

        RSACryptoServiceProvider rsa_private = new RSACryptoServiceProvider();
        rsa_private.ImportCspBlob(blob);

        CertificateHandler ch = new CertificateHandler(node_config.Security.CertificatePath);
        bso = new ProtocolSecurityOverlord(current_node, rsa_private, current_node.Rrm, ch);
        bso.Subscribe(current_node, null);

        current_node.GetTypeSource(SecurityOverlord.Security).Subscribe(bso, null);
        current_node.HeartBeatEvent += bso.Heartbeat;

        if(node_config.Security.TestEnable) {
          blob = rsa_private.ExportCspBlob(false);
          RSACryptoServiceProvider rsa_pub = new RSACryptoServiceProvider();
          rsa_pub.ImportCspBlob(blob);
          CertificateMaker cm = new CertificateMaker("United States", "UFL", 
              "ACIS", "David Wolinsky", "*****@*****.**", rsa_pub,
              "brunet:node:abcdefghijklmnopqrs");
          Certificate cacert = cm.Sign(cm, rsa_private);

          cm = new CertificateMaker("United States", "UFL", 
              "ACIS", "David Wolinsky", "*****@*****.**", rsa_pub,
              address.ToString());
          Certificate cert = cm.Sign(cacert, rsa_private);
          ch.AddCACertificate(cacert.X509);
          ch.AddSignedCertificate(cert.X509);
        }
      }

      EdgeListener el = null;
      foreach(NodeConfig.EdgeListener item in node_config.EdgeListeners) {
        int port = item.port;
        if (item.type =="tcp") {
          try {
            el = new TcpEdgeListener(port, addresses);
          }
          catch {
            el = new TcpEdgeListener(0, addresses);
          }
        }
        else if (item.type == "udp") {
          try {
            el = new UdpEdgeListener(port, addresses);
          }
          catch {
            el = new UdpEdgeListener(0, addresses);
          }
        }
        else if(item.type == "function") {
          port = port == 0 ? (new Random()).Next(1024, 65535) : port;
          el = new FunctionEdgeListener(port, 0, null);
        }
        else {
          throw new Exception("Unrecognized transport: " + item.type);
        }
        if (node_config.Security.SecureEdgesEnabled) {
          el = new SecureEdgeListener(el, bso);
        }
        current_node.AddEdgeListener(el);
      }

      ArrayList RemoteTAs = null;
      if(node_config.RemoteTAs != null) {
        RemoteTAs = new ArrayList();
        foreach(String ta in node_config.RemoteTAs) {
          RemoteTAs.Add(TransportAddressFactory.CreateInstance(ta));
        }
        current_node.RemoteTAs = RemoteTAs;
      }
      ITunnelOverlap ito = null;
      ito = new SimpleTunnelOverlap();

      el = new Tunnel.TunnelEdgeListener(current_node, ito);
      if(node_config.Security.SecureEdgesEnabled) {
        current_node.EdgeVerifyMethod = EdgeVerify.AddressInSubjectAltName;
        el = new SecureEdgeListener(el, bso);
      }      
      current_node.AddEdgeListener(el);

      new TableServer(current_node);
      if (type == "cache") {
        _c_dht = new Dht(current_node, 3, 20);
        _c_dht_proxy = new RpcDhtProxy(_c_dht, current_node);
        _cs = new CacheList(current_node);
	//_cll = new ClusterList(current_node);
        //current_node.MapReduce.SubscribeTask(new MapReduceClusterCache(current_node, _cll));
        current_node.MapReduce.SubscribeTask(new MapReduceCache(current_node,_cs));
        Console.WriteLine("MapReduceCacheTask is subscribed at {0}", current_node.Address);
        _c_node = current_node;
      }
      else {
        _q_dht = new Dht(current_node, 3, 20);
        _q_dht_proxy = new RpcDhtProxy(_c_dht, current_node);
        CacheList q_cs = new CacheList(current_node);
        //current_node.MapReduce.SubscribeTask(new MapReduceClusterQuery(current_node, _cll));
        current_node.MapReduce.SubscribeTask(new MapReduceQuery(current_node,_cs));
        Console.WriteLine("MapReduceQueryTask is subscribed at {0}", current_node.Address);
        _q_node = current_node;
      }
    }
示例#10
0
 /// <summary>Given a EdgeListener info and a list of addresses to advertise,
 /// returns an EdgeListener.</summary>
 protected EdgeListener CreateBaseEdgeListener(NodeConfig.EdgeListener el_info,
     ApplicationNode node, IEnumerable addresses)
 {
   EdgeListener el = null;
   int port = el_info.port;
   if(el_info.type == "tcp") {
     try {
       el = new TcpEdgeListener(port, addresses);
     } catch {
       el = new TcpEdgeListener(0, addresses);
     }
   } else if(el_info.type == "udp") {
     try {
       el = new UdpEdgeListener(port, addresses);
     } catch {
       el = new UdpEdgeListener(0, addresses);
     }
   } else if(el_info.type == "function") {
     port = port == 0 ? (new Random()).Next(1024, 65535) : port;
     el = new FunctionEdgeListener(port, 0, null);
   } else {
     throw new Exception("Unrecognized transport: " + el_info.type);
   }
   return el;
 }