Inheritance: AbstractNode
Example #1
0
        // Ask epmd to close his end of the connection.
        // Caller should close his epmd socket as well.
        // This method is pretty forgiving...

        /*
         * Unregister from Epmd. Other nodes wishing to connect will no
         * longer be able to.
         *
         * <p> This method does not report any failures.
         **/
        public static void  unPublishPort(OtpLocalNode node)
        {
            TcpClient s = null;

            try
            {
                s = new TcpClient(System.Net.Dns.GetHostName(), epmdPort);
                OtpOutputStream obuf = new OtpOutputStream();
                obuf.write2BE(node.getAlive().Length + 1);
                obuf.write1(stopReq);
                //UPGRADE_NOTE: This code will be optimized in the future;
                byte[] tmpBytes;
                int    i;
                string tmpStr;
                tmpStr   = node.getAlive();
                tmpBytes = new byte[tmpStr.Length];
                i        = 0;
                while (i < tmpStr.Length)
                {
                    tmpBytes[i] = (byte)tmpStr[i];
                    i++;
                }
                obuf.writeN(tmpBytes);
                obuf.writeTo((System.IO.Stream)s.GetStream());
                // don't even wait for a response (is there one?)
                if (traceLevel >= traceThreshold)
                {
                    OtpTrace.TraceEvent("-> UNPUBLISH " + node + " port=" + node.port());
                    OtpTrace.TraceEvent("<- OK (assumed)");
                }
            }
            catch (System.Exception)
            {
                /*ignore all failures */
            }
            finally
            {
                try
                {
                    if (s != null)
                    {
                        s.Close();
                    }
                }
                catch (System.IO.IOException)
                {
                    /*ignore close failure */
                }
                s = null;
            }
        }
Example #2
0
        /*
         * Register with Epmd, so that other nodes are able to find and
         * connect to it.
         *
         * @param node the server node that should be registered with Epmd.
         *
         * @return true if the operation was successful. False if the node
         * was already registered.
         *
         * @exception C#.io.IOException if there was no response from the
         * name server.
         **/
        public static bool publishPort(OtpLocalNode node)
        {
            System.Net.Sockets.TcpClient s = null;

            try
            {
                s = r4_publish(node);
            }
            catch (System.IO.IOException)
            {
                s = r3_publish(node);
            }

            node.setEpmd(s);

            return(s != null);
        }
Example #3
0
        /*this function will get an exception if it tries to talk to an r3
         * epmd, or if something else happens that it cannot forsee. In both
         * cases we return an exception (and the caller should try again, using
         * the r3 protocol).
         * If we manage to successfully communicate with an r4 epmd, we return
         * either the socket, or null, depending on the result.
         */
        private static System.Net.Sockets.TcpClient r4_publish(OtpLocalNode node)
        {
            System.Net.Sockets.TcpClient s     = null;
            System.Exception             error = null;

            try
            {
                OtpOutputStream obuf = new OtpOutputStream();
                s = new TcpClient(System.Net.Dns.GetHostName(), epmdPort);

                obuf.write2BE(node.getAlive().Length + 13);

                obuf.write1(publish4req);
                obuf.write2BE(node.port());

                obuf.write1(node.type());

                obuf.write1(node.proto());
                obuf.write2BE(node.distHigh());
                obuf.write2BE(node.distLow());

                obuf.write2BE(node.getAlive().Length);
                //UPGRADE_NOTE: This code will be optimized in the future;
                byte[] tmpBytes;
                int    i;
                string tmpStr;
                tmpStr   = node.getAlive();
                tmpBytes = new byte[tmpStr.Length];
                i        = 0;
                while (i < tmpStr.Length)
                {
                    tmpBytes[i] = (byte)tmpStr[i];
                    i++;
                }
                obuf.writeN(tmpBytes);
                obuf.write2BE(0);                 // No extra

                // send request
                obuf.writeTo((System.IO.Stream)s.GetStream());

                if (traceLevel >= traceThreshold)
                {
                    OtpTrace.TraceEvent("-> PUBLISH (r4) " + node + " port=" + node.port());
                }

                // get reply
                byte[] tmpbuf = new byte[100];
                int    n      = s.GetStream().Read(tmpbuf, 0, 100);

                if (n < 0)
                {
                    // this was an r3 node => not a failure (yet)
                    if (s != null)
                    {
                        s.Close();
                    }
                    throw new System.IO.IOException("Nameserver not responding on " + node.host() + " when publishing " + node.getAlive());
                }

                OtpInputStream ibuf = new OtpInputStream(tmpbuf);

                int response = ibuf.read1();
                if (response == publish4resp)
                {
                    int result = ibuf.read1();
                    if (result == 0)
                    {
                        node._creation = ibuf.read2BE();
                        if (traceLevel >= traceThreshold)
                        {
                            OtpTrace.TraceEvent("<- OK");
                        }
                        return(s);                        // success
                    }
                }
            }
            catch (System.IO.IOException e)
            {
                error = e;
            }
            catch (Erlang.Exception e)
            {
                error = e;
            }
            catch (System.Net.Sockets.SocketException e)
            {
                error = e;
            }

            if (error == null)
            {
                return(s);
            }
            else
            {
                // epmd closed the connection = fail
                if (s != null)
                {
                    s.Close();
                }
                if (traceLevel >= traceThreshold)
                {
                    System.Console.Out.WriteLine("<- (no response)");
                }

                string err = "Nameserver not responding on " + node.host() + " when publishing " + node.getAlive();
                node.epmdFailedConnAttempt(node.node(), err);

                if (traceLevel >= traceThreshold)
                {
                    System.Console.Out.WriteLine("Failed to connect to empd daemon!");
                }

                if (!OtpLocalNode.ignoreLocalEpmdConnectErrors)
                {
                    throw new System.Exception(err);
                }

                node._creation = 0;
                return(null);
            }
        }
Example #4
0
        private static System.Net.Sockets.TcpClient r3_publish(OtpLocalNode node)
        {
            System.Net.Sockets.TcpClient s = null;

            try
            {
                OtpOutputStream obuf = new OtpOutputStream();
                s = new System.Net.Sockets.TcpClient(System.Net.Dns.GetHostName(), epmdPort);

                obuf.write2BE(node.getAlive().Length + 3);

                obuf.write1(publish3req);
                obuf.write2BE(node.port());
                //UPGRADE_NOTE: This code will be optimized in the future;
                byte[] tmpBytes;
                int    i;
                string tmpStr;
                tmpStr   = node.getAlive();
                tmpBytes = new byte[tmpStr.Length];
                i        = 0;
                while (i < tmpStr.Length)
                {
                    tmpBytes[i] = (byte)tmpStr[i];
                    i++;
                }
                obuf.writeN(tmpBytes);

                // send request
                obuf.writeTo((System.IO.Stream)s.GetStream());
                if (traceLevel >= traceThreshold)
                {
                    OtpTrace.TraceEvent("-> PUBLISH (r3) " + node + " port=" + node.port());
                }

                byte[] tmpbuf = new byte[100];

                int n = s.GetStream().Read(tmpbuf, 0, 100);

                if (n < 0)
                {
                    if (s != null)
                    {
                        s.Close();
                    }
                    if (traceLevel >= traceThreshold)
                    {
                        OtpTrace.TraceEvent("<- (no response)");
                    }
                    return(null);
                }

                OtpInputStream ibuf = new OtpInputStream(tmpbuf);

                if (ibuf.read1() == publish3ok)
                {
                    node._creation = ibuf.read2BE();
                    if (traceLevel >= traceThreshold)
                    {
                        OtpTrace.TraceEvent("<- OK");
                    }
                    return(s);                    // success - don't close socket
                }
            }
            catch (System.IO.IOException)
            {
                // epmd closed the connection = fail
                if (s != null)
                {
                    s.Close();
                }
                if (traceLevel >= traceThreshold)
                {
                    OtpTrace.TraceEvent("<- (no response)");
                }
                throw new System.IO.IOException("Nameserver not responding on " + node.host() + " when publishing " + node.getAlive());
            }
            catch (Erlang.Exception)
            {
                if (s != null)
                {
                    s.Close();
                }
                if (traceLevel >= traceThreshold)
                {
                    OtpTrace.TraceEvent("<- (invalid response)");
                }
                throw new System.IO.IOException("Nameserver not responding on " + node.host() + " when publishing " + node.getAlive());
            }

            if (s != null)
            {
                s.Close();
            }
            return(null);            // failure
        }
Example #5
0
 /*Send an auth error to peer because he sent a bad cookie.
 * The auth error uses his cookie (not revealing ours).
 * This is just like send_reg otherwise
 */
 private void  cookieError(OtpLocalNode local, Erlang.Atom cookie)
 {
     try
     {
         OtpOutputStream header = new OtpOutputStream(headerLen);
         
         // preamble: 4 byte length + "passthrough" tag + version
         header.write4BE(0); // reserve space for length
         header.write1(passThrough);
         header.write1(version);
         
         header.write_tuple_head(4);
         header.write_long((long)OtpMsg.Tag.regSendTag);
         header.write_any(local.createPid()); // disposable pid
         header.write_atom(cookie.atomValue()); // important: his cookie, not mine...
         header.write_atom("auth");
         
         // version for payload
         header.write1(version);
         
         // the payload
         
         // the no_auth message (copied from Erlang) Don't change this (Erlang will crash)
         // {$gen_cast, {print, "~n** Unauthorized cookie ~w **~n", [foo@aule]}}
         Erlang.Object[] msg = new Erlang.Object[2];
         Erlang.Object[] msgbody = new Erlang.Object[3];
         
         msgbody[0] = new Erlang.Atom("print");
         msgbody[1] = new Erlang.String("~n** Bad cookie sent to " + local + " **~n");
         // Erlang will crash and burn if there is no third argument here...
         msgbody[2] = new Erlang.List(); // empty list
         
         msg[0] = new Erlang.Atom("$gen_cast");
         msg[1] = new Erlang.Tuple(msgbody);
         
         OtpOutputStream payload = new OtpOutputStream(new Erlang.Tuple(msg));
         
         // fix up length in preamble
         header.poke4BE(0, header.count() + payload.count() - 4);
         
         try
         {
             do_send(header, payload);
         }
         catch (System.IO.IOException)
         {
         } // ignore
     }
     finally
     {
         close();
         throw new OtpAuthException("Remote cookie not authorized: " + cookie.atomValue());
     }
 }
Example #6
0
 /*
 * Intiate and open a connection to a remote node.
 *
 * @exception C#.io.IOException if it was not possible to connect to the peer.
 * @exception OtpAuthException if handshake resulted in an authentication error.
 */
 protected internal AbstractConnection(OtpLocalNode self, OtpPeer other)
     : this(self, other, self.cookie())
 {
 }
Example #7
0
 /*
 * Intiate and open a connection to a remote node.
 *
 * @exception C#.io.IOException if it was not possible to connect to the peer.
 * @exception OtpAuthException if handshake resulted in an authentication error.
 */
 protected internal AbstractConnection(OtpLocalNode self, OtpPeer other, string cookie)
 {
     this.peer = other;
     this.self = self;
     this.socket = null;
     this.auth_cookie = cookie;
     
     //this.IsBackground = true;
     
     // now get a connection between the two...
     int port = OtpEpmd.lookupPort(peer);
     
     // now find highest common dist value
     if ((peer._proto != self._proto) || (self._distHigh < peer._distLow) || (self._distLow > peer._distHigh))
     {
         throw new System.IO.IOException("No common protocol found - cannot connect");
     }
     
     // highest common version: min(peer.distHigh, self.distHigh)
     peer.distChoose = (peer._distHigh > self._distHigh ? self._distHigh : peer._distHigh);
     
     doConnect(port);
     
     this.name = peer.node();
     this.connected = true;
 }
Example #8
0
 private AbstractConnection(OtpLocalNode self, OtpPeer peer, System.Net.Sockets.TcpClient s, string cookie)
 {
     this.peer = peer;
     this.self = self;
     this.socket = s;
     this.auth_cookie = cookie ?? self._cookie;
     this.sentBytes = 0;
     this.receivedBytes = 0;
     this.maxPayloadLength = defaultMaxPayloadLength;
 }
Example #9
0
        /*
        * Accept an incoming connection from a remote node. Used by {@link
        * OtpSelf#accept() OtpSelf.accept()} to create a connection
        * based on data received when handshaking with the peer node, when
        * the remote node is the connection intitiator.
        *
        * @exception C#.io.IOException if it was not possible to connect to the peer.
        * @exception OtpAuthException if handshake resulted in an authentication error
        */
        protected internal AbstractConnection(OtpLocalNode self, System.Net.Sockets.TcpClient s)
        {
            this.self = self;
            this.peer = new OtpPeer();
            this.socket = s;
            this.auth_cookie = self.cookie();

            this.socket.NoDelay = true;
            // Use keepalive timer
            this.socket.Client.SetSocketOption(
                System.Net.Sockets.SocketOptionLevel.Socket,
                System.Net.Sockets.SocketOptionName.KeepAlive, true);
            // Close socket gracefully
            this.socket.Client.SetSocketOption(
                System.Net.Sockets.SocketOptionLevel.Socket,
                System.Net.Sockets.SocketOptionName.DontLinger, true);

            //this.socket.ReceiveTimeout = 5000;

            if (traceLevel >= OtpTrace.Type.handshakeThreshold)
            {
                OtpTrace.TraceEvent("<- ACCEPT FROM " + 
                    System.Net.IPAddress.Parse(s.Client.RemoteEndPoint.ToString()).ToString() + ":" +
                    (s.Client.RemoteEndPoint as System.Net.IPEndPoint).Port.ToString());
            }
            
            // get his info
            recvName(this.peer);
            
            // now find highest common dist value
            if ((peer._proto != self._proto) || (self._distHigh < peer._distLow) || (self._distLow > peer._distHigh))
            {
                close();
                throw new System.IO.IOException("No common protocol found - cannot accept connection");
            }
            // highest common version: min(peer.distHigh, self.distHigh)
            peer.distChoose = (peer._distHigh > self._distHigh?self._distHigh:peer._distHigh);
            
            doAccept();
            this.name = peer.node();
        }
Example #10
0
        /*this function will get an exception if it tries to talk to an r3
        * epmd, or if something else happens that it cannot forsee. In both
        * cases we return an exception (and the caller should try again, using
        * the r3 protocol).
        * If we manage to successfully communicate with an r4 epmd, we return
        * either the socket, or null, depending on the result.
        */
        private static System.Net.Sockets.TcpClient r4_publish(OtpLocalNode node)
        {
            System.Net.Sockets.TcpClient s = null;

            try
            {
                OtpOutputStream obuf = new OtpOutputStream();
                s = new TcpClient(System.Net.Dns.GetHostName(), epmdPort);

                obuf.write2BE(node.getAlive().Length + 13);

                obuf.write1(publish4req);
                obuf.write2BE(node.port());

                obuf.write1(node.type());

                obuf.write1(node.proto());
                obuf.write2BE(node.distHigh());
                obuf.write2BE(node.distLow());

                obuf.write2BE(node.getAlive().Length);
                //UPGRADE_NOTE: This code will be optimized in the future;
                byte[] tmpBytes;
                int i;
                string tmpStr;
                tmpStr = node.getAlive();
                tmpBytes = new byte[tmpStr.Length];
                i = 0;
                while (i < tmpStr.Length)
                {
                    tmpBytes[i] = (byte) tmpStr[i];
                    i++;
                }
                obuf.writeN(tmpBytes);
                obuf.write2BE(0); // No extra

                // send request
                obuf.writeTo((System.IO.Stream) s.GetStream());

                if (traceLevel >= traceThreshold)
                    System.Console.Out.WriteLine("-> PUBLISH (r4) " + node + " port=" + node.port());

                // get reply
                byte[] tmpbuf = new byte[100];
                int n = s.GetStream().Read(tmpbuf, 0, 100);

                if (n < 0)
                {
                    // this was an r3 node => not a failure (yet)
                    if (s != null)
                        s.Close();
                    throw new System.IO.IOException("Nameserver not responding on " + node.host() + " when publishing " + node.getAlive());
                }

                OtpInputStream ibuf = new OtpInputStream(tmpbuf);

                int response = ibuf.read1();
                if (response == publish4resp)
                {
                    int result = ibuf.read1();
                    if (result == 0)
                    {
                        node._creation = ibuf.read2BE();
                        if (traceLevel >= traceThreshold)
                            System.Console.Out.WriteLine("<- OK");
                        return s; // success
                    }
                }
            }
            catch (System.IO.IOException)
            {
                // epmd closed the connection = fail
                if (s != null)
                    s.Close();
                if (traceLevel >= traceThreshold)
                    System.Console.Out.WriteLine("<- (no response)");
                throw new System.IO.IOException("Nameserver not responding on " + node.host() + " when publishing " + node.getAlive());
            }
            catch (Erlang.DecodeException)
            {
                if (s != null)
                    s.Close();
                if (traceLevel >= traceThreshold)
                    System.Console.Out.WriteLine("<- (invalid response)");
                throw new System.IO.IOException("Nameserver not responding on " + node.host() + " when publishing " + node.getAlive());
            }

            if (s != null)
                s.Close();
            return null;
        }
Example #11
0
        // Ask epmd to close his end of the connection.
        // Caller should close his epmd socket as well.
        // This method is pretty forgiving...
        /*
        * Unregister from Epmd. Other nodes wishing to connect will no
        * longer be able to.
        *
        * <p> This method does not report any failures.
        **/
        public static void unPublishPort(OtpLocalNode node)
        {
            TcpClient s = null;

            try
            {
                s = new TcpClient(System.Net.Dns.GetHostName(), epmdPort);
                OtpOutputStream obuf = new OtpOutputStream();
                obuf.write2BE(node.getAlive().Length + 1);
                obuf.write1(stopReq);
                //UPGRADE_NOTE: This code will be optimized in the future;
                byte[] tmpBytes;
                int i;
                string tmpStr;
                tmpStr = node.getAlive();
                tmpBytes = new byte[tmpStr.Length];
                i = 0;
                while (i < tmpStr.Length)
                {
                    tmpBytes[i] = (byte) tmpStr[i];
                    i++;
                }
                obuf.writeN(tmpBytes);
                obuf.writeTo((System.IO.Stream) s.GetStream());
                // don't even wait for a response (is there one?)
                if (traceLevel >= traceThreshold)
                {
                    System.Console.Out.WriteLine("-> UNPUBLISH " + node + " port=" + node.port());
                    System.Console.Out.WriteLine("<- OK (assumed)");
                }
            }
            catch (System.Exception)
            {
                /*ignore all failures */
            }
            finally
            {
                try
                {
                    if (s != null)
                        s.Close();
                }
                catch (System.IO.IOException)
                {
                    /*ignore close failure */
                }
                s = null;
            }
        }
Example #12
0
        /*
        * Register with Epmd, so that other nodes are able to find and
        * connect to it.
        *
        * @param node the server node that should be registered with Epmd.
        *
        * @return true if the operation was successful. False if the node
        * was already registered.
        *
        * @exception C#.io.IOException if there was no response from the
        * name server.
        **/
        public static bool publishPort(OtpLocalNode node)
        {
            System.Net.Sockets.TcpClient s = null;

            try
            {
                s = r4_publish(node);
            }
            catch (System.IO.IOException)
            {
                s = r3_publish(node);
            }

            node.setEpmd(s);

            return (s != null);
        }
Example #13
0
        /*
        * Accept an incoming connection from a remote node. Used by {@link
        * OtpSelf#accept() OtpSelf.accept()} to create a connection
        * based on data received when handshaking with the peer node, when
        * the remote node is the connection intitiator.
        *
        * @exception C#.io.IOException if it was not possible to connect to the peer.
        * @exception OtpAuthException if handshake resulted in an authentication error
        */
        protected internal AbstractConnection(OtpLocalNode self, System.Net.Sockets.TcpClient s)
        {
            this.self = self;
            this.peer = new OtpPeer();
            this.socket = s;

            this.socket.NoDelay = true;

            this.traceLevel = defaultLevel;

            if (traceLevel >= handshakeThreshold)
            {
                System.Console.Out.WriteLine("<- ACCEPT FROM ?");
            /*
                System.Net.Sockets.Socket sock = s.Client;
                //UPGRADE_TODO: Expression C#.net.Socket.getInetAddress could not be converted.;
                //UPGRADE_TODO: Expression C#.net.Socket.getPort could not be converted.;
                System.Console.Out.WriteLine("<- ACCEPT FROM " +
                    IPAddress.Parse(((IPEndPoint)s.RemoteEndPoint).Address.ToString())+ ":" +
                    ((IPEndPoint)s.RemoteEndPoint).Port.ToString());
            */
            }

            // get his info
            recvName(this.peer);

            // now find highest common dist value
            if ((peer._proto != self._proto) || (self._distHigh < peer._distLow) || (self._distLow > peer._distHigh))
            {
                close();
                throw new System.IO.IOException("No common protocol found - cannot accept connection");
            }
            // highest common version: min(peer.distHigh, self.distHigh)
            peer.distChoose = (peer._distHigh > self._distHigh?self._distHigh:peer._distHigh);

            doAccept();
            this.name = peer.node();
        }
Example #14
0
		private static System.Net.Sockets.TcpClient r3_publish(OtpLocalNode node)
		{
			System.Net.Sockets.TcpClient s = null;
			
			try
			{
				OtpOutputStream obuf = new OtpOutputStream();
				s = new System.Net.Sockets.TcpClient(System.Net.Dns.GetHostName(), epmdPort);
				
				obuf.write2BE(node.getAlive().Length + 3);
				
				obuf.write1(publish3req);
				obuf.write2BE(node.port());
				//UPGRADE_NOTE: This code will be optimized in the future;
				byte[] tmpBytes;
				int i;
				string tmpStr;
				tmpStr = node.getAlive();
				tmpBytes = new byte[tmpStr.Length];
				i = 0;
				while (i < tmpStr.Length)
				{
					tmpBytes[i] = (byte) tmpStr[i];
					i++;
				}
				obuf.writeN(tmpBytes);
				
				// send request
				obuf.writeTo((System.IO.Stream) s.GetStream());
				if (traceLevel >= traceThreshold)
					OtpTrace.TraceEvent("-> PUBLISH (r3) " + node + " port=" + node.port());
				
				byte[] tmpbuf = new byte[100];

				int n = s.GetStream().Read(tmpbuf, 0, 100);
				
				if (n < 0)
				{
					if (s != null)
						s.Close();
					if (traceLevel >= traceThreshold)
						OtpTrace.TraceEvent("<- (no response)");
					return null;
				}
				
				OtpInputStream ibuf = new OtpInputStream(tmpbuf);
				
				if (ibuf.read1() == publish3ok)
				{
					node._creation = ibuf.read2BE();
					if (traceLevel >= traceThreshold)
						OtpTrace.TraceEvent("<- OK");
					return s; // success - don't close socket
				}
			}
			catch (System.IO.IOException)
			{
				// epmd closed the connection = fail
				if (s != null)
					s.Close();
				if (traceLevel >= traceThreshold)
					OtpTrace.TraceEvent("<- (no response)");
				throw new System.IO.IOException("Nameserver not responding on " + node.host() + " when publishing " + node.getAlive());
			}
			catch (Erlang.Exception)
			{
				if (s != null)
					s.Close();
				if (traceLevel >= traceThreshold)
					OtpTrace.TraceEvent("<- (invalid response)");
				throw new System.IO.IOException("Nameserver not responding on " + node.host() + " when publishing " + node.getAlive());
			}
			
			if (s != null)
				s.Close();
			return null; // failure
		}