read2BE() public méthode

public read2BE ( ) : int
Résultat int
Exemple #1
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
        }
Exemple #2
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);
            }
        }
Exemple #3
0
        private static int r3_lookupPort(AbstractNode node)
        {
            int port = 0;

            System.Net.Sockets.TcpClient s = null;

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

                // build and send epmd request
                // length[2], tag[1], alivename[n] (length = n+1)
                obuf.write2BE(node.getAlive().Length + 1);
                obuf.write1(port3req);
                //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("-> LOOKUP (r3) " + node);
                }

                // receive and decode reply
                byte[] tmpbuf = new byte[100];

                s.GetStream().Read(tmpbuf, 0, 100);
                OtpInputStream ibuf = new OtpInputStream(tmpbuf);

                port = ibuf.read2BE();
            }
            catch (System.IO.IOException)
            {
                if (traceLevel >= traceThreshold)
                {
                    OtpTrace.TraceEvent("<- (no response)");
                }
                throw new System.IO.IOException("Nameserver not responding on " + node.host() + " when looking up " + node.getAlive());
            }
            catch (Erlang.Exception)
            {
                if (traceLevel >= traceThreshold)
                {
                    OtpTrace.TraceEvent("<- (invalid response)");
                }
                throw new System.IO.IOException("Nameserver not responding on " + node.host() + " when looking up " + node.getAlive());
            }
            finally
            {
                try
                {
                    if (s != null)
                    {
                        s.Close();
                    }
                }
                catch (System.IO.IOException)
                {
                    /*ignore close errors */
                }
                s = null;
            }

            if (traceLevel >= traceThreshold)
            {
                if (port == 0)
                {
                    OtpTrace.TraceEvent("<- NOT FOUND");
                }
                else
                {
                    OtpTrace.TraceEvent("<- PORT " + port);
                }
            }
            return(port);
        }
Exemple #4
0
        private static int r4_lookupPort(AbstractNode node)
        {
            int port = 0;

            System.Net.Sockets.TcpClient s = null;

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

                // build and send epmd request
                // length[2], tag[1], alivename[n] (length = n+1)
                obuf.write2BE(node.getAlive().Length + 1);
                obuf.write1(port4req);
                //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("-> LOOKUP (r4) " + node);
                }

                // receive and decode reply
                // resptag[1], result[1], port[2], ntype[1], proto[1],
                // disthigh[2], distlow[2], nlen[2], alivename[n],
                // elen[2], edata[m]
                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 looking up " + node.getAlive());
                }

                OtpInputStream ibuf = new OtpInputStream(tmpbuf);

                int response = ibuf.read1();
                if (response == port4resp)
                {
                    int result = ibuf.read1();
                    if (result == 0)
                    {
                        port = ibuf.read2BE();

                        node.ntype     = ibuf.read1();
                        node._proto    = ibuf.read1();
                        node._distHigh = ibuf.read2BE();
                        node._distLow  = ibuf.read2BE();
                        // ignore rest of fields
                    }
                }
            }
            catch (System.IO.IOException)
            {
                if (traceLevel >= traceThreshold)
                {
                    OtpTrace.TraceEvent("<- (no response)");
                }
                throw new System.IO.IOException("Nameserver not responding on " + node.host() + " when looking up " + node.getAlive());
            }
            catch (Erlang.Exception)
            {
                if (traceLevel >= traceThreshold)
                {
                    OtpTrace.TraceEvent("<- (invalid response)");
                }
                throw new System.IO.IOException("Nameserver not responding on " + node.host() + " when looking up " + node.getAlive());
            }
            catch (System.Net.Sockets.SocketException)
            {
                if (traceLevel >= traceThreshold)
                {
                    OtpTrace.TraceEvent("<- (no epmd response)");
                }
                throw new System.IO.IOException("Nameserver not responding on " + node.host() + " when looking up " + node.getAlive());
            }
            finally
            {
                try
                {
                    if (s != null)
                    {
                        s.Close();
                    }
                }
                catch (System.IO.IOException)
                {
                    /*ignore close errors */
                }
                s = null;
            }

            if (traceLevel >= traceThreshold)
            {
                if (port == 0)
                {
                    OtpTrace.TraceEvent("<- NOT FOUND");
                }
                else
                {
                    OtpTrace.TraceEvent("<- PORT " + port);
                }
            }
            return(port);
        }
        protected internal virtual void  recvName(OtpPeer peer)
        {
            
            System.String hisname = "";
            
            try
            {
                byte[] tmpbuf = read2BytePackage();
                OtpInputStream ibuf = new OtpInputStream(tmpbuf);
                byte[] tmpname;
                int len = (int) (tmpbuf.Length);
                peer.ntype = ibuf.read1();
                if (peer.ntype != AbstractNode.NTYPE_R6)
                {
                    throw new System.IO.IOException("Unknown remote node type");
                }
                peer._distLow = (peer._distHigh = ibuf.read2BE());
                if (peer._distLow < 5)
                {
                    throw new System.IO.IOException("Unknown remote node type");
                }
                peer.flags = ibuf.read4BE();
                tmpname = new byte[len - 7];
                ibuf.readN(tmpname);
                char[] tmpChar;
                tmpChar = new char[tmpname.Length];
                tmpname.CopyTo(tmpChar, 0);
                hisname = new System.String(tmpChar);
                // Set the old nodetype parameter to indicate hidden/normal status
                // When the old handshake is removed, the ntype should also be.
                if ((peer.flags & AbstractNode.dFlagPublished) != 0)
                    peer.ntype = AbstractNode.NTYPE_R4_ERLANG;
                else
                    peer.ntype = AbstractNode.NTYPE_R4_HIDDEN;


                if ((peer.flags & AbstractNode.dFlagExtendedReferences) == 0) 
                {
                    throw new System.IO.IOException("Handshake failed - peer cannot handle extended references");
                }
                  
                if (OtpSystem.useExtendedPidsPorts() && (peer.flags & AbstractNode.dFlagExtendedPidsPorts) == 0) 
                if (true && (peer.flags & AbstractNode.dFlagExtendedPidsPorts) == 0) 
                {
                    throw new System.IO.IOException("Handshake failed - peer cannot handle extended pids and ports");
                }
            }
            catch (Erlang.Exception)
            {
                throw new System.IO.IOException("Handshake failed - not enough data");
            }
            
            
            int i = hisname.IndexOf((System.Char) '@', 0);
            peer._node = hisname;
            peer._alive = hisname.Substring(0, (i) - (0));
            peer._host = hisname.Substring(i + 1, (hisname.Length) - (i + 1));
            
            if (traceLevel >= OtpTrace.Type.handshakeThreshold)
            {
                OtpTrace.TraceEvent("<- " + "HANDSHAKE" + " ntype=" + peer.ntype + " dist=" + peer._distHigh + " remote=" + peer);
            }
        }
 protected internal virtual int recvChallenge()
 {
     
     int challenge;
     
     try
     {
         byte[] buf = read2BytePackage();
         OtpInputStream ibuf = new OtpInputStream(buf);
         peer.ntype = ibuf.read1();
         if (peer.ntype != AbstractNode.NTYPE_R6)
         {
             throw new System.IO.IOException("Unexpected peer type");
         }
         peer._distLow = (peer._distHigh = ibuf.read2BE());
         peer.flags = ibuf.read4BE();
         challenge = ibuf.read4BE();
         byte[] tmpname = new byte[buf.Length - 11];
         ibuf.readN(tmpname);
         char[] tmpChar;
         tmpChar = new char[tmpname.Length];
         tmpname.CopyTo(tmpChar, 0);
         System.String hisname = new System.String(tmpChar);
         int i = hisname.IndexOf((System.Char) '@', 0);
         peer._node = hisname;
         peer._alive = hisname.Substring(0, (i) - (0));
         peer._host = hisname.Substring(i + 1, (hisname.Length) - (i + 1));
     }
     catch (Erlang.Exception)
     {
         throw new System.IO.IOException("Handshake failed - not enough data");
     }
     
     if (traceLevel >= OtpTrace.Type.handshakeThreshold)
     {
         OtpTrace.TraceEvent("<- " + "HANDSHAKE recvChallenge" + " from=" + peer._node + " challenge=" + challenge + " local=" + self);
     }
     
     return challenge;
 }
 protected internal virtual byte[] read2BytePackage()
 {
     
     byte[] lbuf = new byte[2];
     byte[] tmpbuf;
     
     readSock(socket, lbuf);
     OtpInputStream ibuf = new OtpInputStream(lbuf);
     int len = ibuf.read2BE();
     tmpbuf = new byte[len];
     readSock(socket, tmpbuf);
     return tmpbuf;
 }
Exemple #8
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;
        }
Exemple #9
0
        private static int r4_lookupPort(AbstractNode node)
        {
            int port = 0;
            System.Net.Sockets.TcpClient s = null;

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

                // build and send epmd request
                // length[2], tag[1], alivename[n] (length = n+1)
                obuf.write2BE(node.getAlive().Length + 1);
                obuf.write1(port4req);
                //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)
                    System.Console.Out.WriteLine("-> LOOKUP (r4) " + node);

                // receive and decode reply
                // resptag[1], result[1], port[2], ntype[1], proto[1],
                // disthigh[2], distlow[2], nlen[2], alivename[n],
                // elen[2], edata[m]
                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 looking up " + node.getAlive());
                }

                OtpInputStream ibuf = new OtpInputStream(tmpbuf);

                int response = ibuf.read1();
                if (response == port4resp)
                {
                    int result = ibuf.read1();
                    if (result == 0)
                    {
                        port = ibuf.read2BE();

                        node.ntype = ibuf.read1();
                        node._proto = ibuf.read1();
                        node._distHigh = ibuf.read2BE();
                        node._distLow = ibuf.read2BE();
                        // ignore rest of fields
                    }
                }
            }
            catch (System.IO.IOException)
            {
                if (traceLevel >= traceThreshold)
                    System.Console.Out.WriteLine("<- (no response)");
                throw new System.IO.IOException("Nameserver not responding on " + node.host() + " when looking up " + node.getAlive());
            }
            catch (Erlang.DecodeException)
            {
                if (traceLevel >= traceThreshold)
                    System.Console.Out.WriteLine("<- (invalid response)");
                throw new System.IO.IOException("Nameserver not responding on " + node.host() + " when looking up " + node.getAlive());
            }
            finally
            {
                try
                {
                    if (s != null)
                        s.Close();
                }
                catch (System.IO.IOException)
                {
                    /*ignore close errors */
                }
                s = null;
            }

            if (traceLevel >= traceThreshold)
            {
                if (port == 0)
                    System.Console.Out.WriteLine("<- NOT FOUND");
                else
                    System.Console.Out.WriteLine("<- PORT " + port);
            }
            return port;
        }
Exemple #10
0
        private static int r3_lookupPort(AbstractNode node)
        {
            int port = 0;
            System.Net.Sockets.TcpClient s = null;

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

                // build and send epmd request
                // length[2], tag[1], alivename[n] (length = n+1)
                obuf.write2BE(node.getAlive().Length + 1);
                obuf.write1(port3req);
                //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)
                    System.Console.Out.WriteLine("-> LOOKUP (r3) " + node);

                // receive and decode reply
                byte[] tmpbuf = new byte[100];

                s.GetStream().Read(tmpbuf, 0, 100);
                OtpInputStream ibuf = new OtpInputStream(tmpbuf);

                port = ibuf.read2BE();
            }
            catch (System.IO.IOException)
            {
                if (traceLevel >= traceThreshold)
                    System.Console.Out.WriteLine("<- (no response)");
                throw new System.IO.IOException("Nameserver not responding on " + node.host() + " when looking up " + node.getAlive());
            }
            catch (Erlang.DecodeException)
            {
                if (traceLevel >= traceThreshold)
                    System.Console.Out.WriteLine("<- (invalid response)");
                throw new System.IO.IOException("Nameserver not responding on " + node.host() + " when looking up " + node.getAlive());
            }
            finally
            {
                try
                {
                    if (s != null)
                        s.Close();
                }
                catch (System.IO.IOException)
                {
                    /*ignore close errors */
                }
                s = null;
            }

            if (traceLevel >= traceThreshold)
            {
                if (port == 0)
                    System.Console.Out.WriteLine("<- NOT FOUND");
                else
                    System.Console.Out.WriteLine("<- PORT " + port);
            }
            return port;
        }
Exemple #11
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
		}