writeN() public method

public writeN ( byte bytes ) : void
bytes byte
return void
        private static int r4_lookupPort(AbstractNode node)
        {
            int port = 0;

            try
            {
                OtpOutputStream obuf = new OtpOutputStream();
                using (TcpClient s = new TcpClient(node.Host, EpmdPort.get()))
                {
                    // build and send epmd request
                    // length[2], tag[1], alivename[n] (length = n+1)
                    obuf.write2BE(node.Alive.Length + 1);
                    obuf.write1(port4req);
                    obuf.writeN(Encoding.GetEncoding("iso-8859-1").GetBytes(node.Alive));

                    // send request
                    obuf.WriteTo(s.GetStream());

                    if (traceLevel >= traceThreshold)
                    {
                        log.Debug("-> 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, tmpbuf.Length);

                    if (n < 0)
                    {
                        // this was an r3 node => not a failure (yet)
                        throw new IOException("Nameserver not responding on "
                                      + node.Host + " when looking up " + node.Alive);
                    }

                    OtpInputStream ibuf = new OtpInputStream(tmpbuf, 0);

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

                            node.Type = ibuf.read1();
                            node.Proto = ibuf.read1();
                            node.DistHigh = ibuf.read2BE();
                            node.DistLow = ibuf.read2BE();
                            // ignore rest of fields
                        }
                    }
                }
            }
            catch (SocketException)
            {
                if (traceLevel >= traceThreshold)
                {
                    log.Debug("<- (no response)");
                }
                throw new IOException("Nameserver not responding on " + node.Host);
            }
            catch (IOException)
            {
                if (traceLevel >= traceThreshold)
                {
                    log.Debug("<- (no response)");
                }
                throw new IOException("Nameserver not responding on " + node.Host
                              + " when looking up " + node.Alive);
            }
            catch (OtpErlangDecodeException)
            {
                if (traceLevel >= traceThreshold)
                {
                    log.Debug("<- (invalid response)");
                }
                throw new IOException("Nameserver not responding on " + node.Host
                              + " when looking up " + node.Alive);
            }

            if (traceLevel >= traceThreshold)
            {
                if (port == 0)
                {
                    log.Debug("<- NOT FOUND");
                }
                else
                {
                    log.Debug("<- PORT " + port);
                }
            }
            return port;
        }
        /*
         * 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 TcpClient r4_publish(OtpLocalNode node)
        {
            TcpClient s = null;

            try
            {
                OtpOutputStream obuf = new OtpOutputStream();
                s = new TcpClient(node.Host, EpmdPort.get());

                obuf.write2BE(node.Alive.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.Alive.Length);
                obuf.writeN(Encoding.GetEncoding("iso-8859-1").GetBytes(node.Alive));
                obuf.write2BE(0); // No extra

                // send request
                obuf.WriteTo(s.GetStream());

                if (traceLevel >= traceThreshold)
                {
                    log.Debug("-> PUBLISH (r4) " + node + " port=" + node.Port);
                }

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

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

                OtpInputStream ibuf = new OtpInputStream(tmpbuf, 0);

                int response = ibuf.read1();
                if (response == publish4resp)
                {
                    int result = ibuf.read1();
                    if (result == 0)
                    {
                        node.Creation = ibuf.read2BE();
                        if (traceLevel >= traceThreshold)
                        {
                            log.Debug("<- OK");
                        }
                        return s; // success
                    }
                }

            }
            catch (SocketException)
            {
                if (traceLevel >= traceThreshold)
                {
                    log.Debug("<- (no response)");
                }
                throw new IOException("Nameserver not responding on " + node.Host);
            }
            catch (IOException)
            {
                // epmd closed the connection = fail
                if (s != null)
                {
                    s.Close();
                }
                if (traceLevel >= traceThreshold)
                {
                    log.Debug("<- (no response)");
                }
                throw new IOException("Nameserver not responding on " + node.Host
                              + " when publishing " + node.Alive);
            }
            catch (OtpErlangDecodeException)
            {
                if (s != null)
                {
                    s.Close();
                }
                if (traceLevel >= traceThreshold)
                {
                    log.Debug("<- (invalid response)");
                }
                throw new IOException("Nameserver not responding on " + node.Host
                              + " when publishing " + node.Alive);
            }

            if (s != null)
            {
                s.Close();
            }
            return null;
        }
        private static TcpClient r3_publish(OtpLocalNode node)
        {
            TcpClient s;

            try
            {
                OtpOutputStream obuf = new OtpOutputStream();
                s = new TcpClient(node.Host, EpmdPort.get());

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

                obuf.write1(publish3req);
                obuf.write2BE(node.Port);
                obuf.writeN(Encoding.GetEncoding("iso-8859-1").GetBytes(node.Alive));

                // send request
                obuf.WriteTo(s.GetStream());
                if (traceLevel >= traceThreshold)
                {
                    log.Debug("-> PUBLISH (r3) " + node + " port=" + node.Port);
                }

                byte[] tmpbuf = new byte[100];

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

                if (n < 0)
                {
                    if (traceLevel >= traceThreshold)
                    {
                        log.Debug("<- (no response)");
                    }
                    return null;
                }

                OtpInputStream ibuf = new OtpInputStream(tmpbuf, 0);

                if (ibuf.read1() == publish3ok)
                {
                    node.Creation = ibuf.read2BE();
                    if (traceLevel >= traceThreshold)
                    {
                        log.Debug("<- OK");
                    }
                    return s; // success - don't close socket
                }
            }
            catch (SocketException)
            {
                if (traceLevel >= traceThreshold)
                {
                    log.Debug("<- (no response)");
                }
                throw new IOException("Nameserver not responding on " + node.Host);
            }
            catch (IOException)
            {
                // epmd closed the connection = fail
                if (traceLevel >= traceThreshold)
                {
                    log.Debug("<- (no response)");
                }
                throw new IOException("Nameserver not responding on " + node.Host
                              + " when publishing " + node.Alive);
            }
            catch (OtpErlangDecodeException)
            {
                if (traceLevel >= traceThreshold)
                {
                    log.Debug("<- (invalid response)");
                }
                throw new IOException("Nameserver not responding on " + node.Host
                              + " when publishing " + node.Alive);
            }
            return null; // failure
        }
        private static int r3_lookupPort(AbstractNode node)
        {
            int port = 0;

            try
            {
                OtpOutputStream obuf = new OtpOutputStream();
                using (TcpClient s = new TcpClient(node.Host, EpmdPort.get()))
                {
                    // build and send epmd request
                    // length[2], tag[1], alivename[n] (length = n+1)
                    obuf.write2BE(node.Alive.Length + 1);
                    obuf.write1(port3req);
                    obuf.writeN(Encoding.GetEncoding("iso-8859-1").GetBytes(node.Alive));

                    // send request
                    obuf.WriteTo(s.GetStream());

                    if (traceLevel >= traceThreshold)
                    {
                        log.Debug("-> LOOKUP (r3) " + node);
                    }

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

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

                    port = ibuf.read2BE();
                }
            }
            catch (SocketException)
            {
                if (traceLevel >= traceThreshold)
                {
                    log.Debug("<- (no response)");
                }
                throw new IOException("Nameserver not responding on " + node.Host);
            }
            catch (IOException)
            {
                if (traceLevel >= traceThreshold)
                {
                    log.Debug("<- (no response)");
                }
                throw new IOException("Nameserver not responding on " + node.Host
                              + " when looking up " + node.Alive);
            }
            catch (OtpErlangDecodeException)
            {
                if (traceLevel >= traceThreshold)
                {
                    log.Debug("<- (invalid response)");
                }
                throw new IOException("Nameserver not responding on " + node.Host
                              + " when looking up " + node.Alive);
            }

            if (traceLevel >= traceThreshold)
            {
                if (port == 0)
                {
                    log.Debug("<- NOT FOUND");
                }
                else
                {
                    log.Debug("<- PORT " + port);
                }
            }
            return port;
        }
 // 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)
 {
     try
     {
         using (TcpClient s = new TcpClient(Dns.GetHostName(), EpmdPort.get()))
         {
             OtpOutputStream obuf = new OtpOutputStream();
             obuf.write2BE(node.Alive.Length + 1);
             obuf.write1(stopReq);
             obuf.writeN(Encoding.GetEncoding("iso-8859-1").GetBytes(node.Alive));
             obuf.WriteTo(s.GetStream());
             // don't even wait for a response (is there one?)
             if (traceLevel >= traceThreshold)
             {
                 log.Debug("-> UNPUBLISH " + node + " port=" + node.Port);
                 log.Debug("<- OK (assumed)");
             }
         }
     }
     catch (Exception) /* ignore all failures */
     {
     }
 }
            private void r4_port(TcpClient s, OtpInputStream ibuf)
            {
                try
                {
                    int len = (int)(ibuf.Length - 1);
                    byte[] alive = new byte[len];
                    ibuf.readN(alive);
                    String name = OtpErlangString.newString(alive);
                    OtpPublishedNode node = null;

                    if (traceLevel >= traceThreshold)
                    {
                        log.Debug("<- PORT (r4) " + name);
                    }

                    lock (portmap)
                    {
                        if (portmap.ContainsKey(name))
                        {
                            node = portmap[name];
                        }
                    }

                    OtpOutputStream obuf = new OtpOutputStream();
                    if (node != null)
                    {
                        obuf.write1(port4resp);
                        obuf.write1(0);
                        obuf.write2BE(node.Port);
                        obuf.write1(node.Type);
                        obuf.write1(node.Proto);
                        obuf.write2BE(node.DistHigh);
                        obuf.write2BE(node.DistLow);
                        obuf.write2BE(len);
                        obuf.writeN(alive);
                        obuf.write2BE(0);
                    }
                    else
                    {
                        obuf.write1(port4resp);
                        obuf.write1(1);
                    }
                    obuf.WriteTo(s.GetStream());
                }
                catch (IOException)
                {
                    if (traceLevel >= traceThreshold)
                    {
                        log.Debug("<- (no response)");
                    }
                    throw new IOException("Request not responding");
                }
                return;
            }
            private void r4_names(TcpClient s, OtpInputStream ibuf)
            {
                try
                {
                    if (traceLevel >= traceThreshold)
                    {
                        log.Debug("<- NAMES(r4) ");
                    }

                    OtpOutputStream obuf = new OtpOutputStream();
                    obuf.write4BE(EpmdPort.get());
                    lock (portmap)
                    {
                        foreach (KeyValuePair<string, OtpPublishedNode> pair in portmap)
                        {
                            OtpPublishedNode node = pair.Value;
                            string info = String.Format("name {0} at port {1}\n", node.Alive, node.Port);
                            byte[] bytes = Encoding.GetEncoding("iso-8859-1").GetBytes(info);
                            obuf.writeN(bytes);
                        }
                    }
                    obuf.WriteTo(s.GetStream());
                }
                catch (IOException)
                {
                    if (traceLevel >= traceThreshold)
                    {
                        log.Debug("<- (no response)");
                    }
                    throw new IOException("Request not responding");
                }
                return;
            }