private void sendBuf(ErlTuple ctrl, ErlOutputStream payload = null) { if (!m_Connected) { throw new ErlException(StringConsts.ERL_CONN_NOT_CONNECTED_ERROR); } var header = new ErlOutputStream(writeVersion: false, capacity: HEADER_LEN); // preamble: 4 byte length + "PASS_THROUGH" tag + version header.Write4BE(0); // reserve space for length header.Write1(PASS_THROUGH); header.Write1((byte)ErlExternalTag.Version); // header info header.WriteTuple(ctrl); // version for payload //header.Write1((byte)ErlExternalTag.Version); // Note that it's already written in the payload if (payload == null) { header.Poke4BE(0, (int)(header.Length - 4)); DoSend(header); } else { header.Poke4BE(0, (int)(header.Length + payload.Length - 4)); DoSend(header, payload); } }
/// <summary> /// Unregister from Epmd. /// Other nodes wishing to connect will no longer be able to /// </summary> public static void UnPublishPort(ErlLocalNode node) { TcpClient s = null; try { s = node.Epmd ?? new TcpClient(ErlLocalNode.LocalHost, EPMD_PORT); ErlOutputStream obuf = new ErlOutputStream( writeVersion: false, capacity: node.AliveName.Length + 8); obuf.Write2BE(node.AliveName.Length + 1); obuf.Write1((byte)Indicator.StopReq); var buf = Encoding.ASCII.GetBytes(node.AliveName); obuf.Write(buf); obuf.WriteTo(s.GetStream()); node.Trace(ErlTraceLevel.Epmd, Direction.Outbound, () => StringConsts.ERL_EPMD_UNPUBLISH.Args(node.NodeName.Value, node.Port)); } catch { s = null; } finally { if (s != null) { try { s.Close(); } catch {} } node.Epmd = null; } }
/// <summary> /// 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 /// </summary> private void cookieError(ErlLocalNode local, ErlAtom cookie) { var header = new ErlOutputStream(writeVersion: false, capacity: HEADER_LEN); // preamble: 4 byte length + "PASS_THROUGH" tag + version header.Write4BE(0); // reserve space for length header.Write1(PASS_THROUGH); header.Write1((byte)ErlExternalTag.Version); header.WriteTupleHead(4); header.WriteLong((long)ErlMsg.Tag.RegSend); header.WritePid(local.CreatePid()); // disposable pid header.WriteAtom(cookie); // important: his cookie, not mine... header.WriteAtom("auth"); // version for payload written later by the payload stream //header.Write1((byte)ErlExternalTag.Version); // the payload // the no_auth message (copied from Erlang) Don't change this (Erlang will crash) // {$gen_cast, {print, "~n** Unauthorized cookie ~w **~n", [foo@aule]}} var msg = ErlObject.Parse( "{'$gen_cast', {print, \"\n** Unauthorized cookie ~w **\n\", [" + local.NodeName.Value + "]}}"); var payload = new ErlOutputStream(msg, writeVersion: true); // fix up length in preamble header.Poke4BE(0, (int)(header.Length + payload.Length - 4)); try { DoSend(header, payload); } catch (Exception e) { Close(); throw new ErlException(StringConsts.ERL_CONN_UNAUTH_COOKIE_ERROR.Args(cookie.Value), e); } }
private void sendStatus(string status) { var obuf = new ErlOutputStream(writeVersion: false, writePktSize: false, capacity: 19); obuf.Write2BE(status.Length + 1); obuf.Write1(CHALLENGE_STATUS); obuf.Write(Encoding.ASCII.GetBytes(status)); obuf.WriteTo(m_TcpClient.GetStream()); m_Home.OnTrace(ErlTraceLevel.Handshake, Direction.Outbound, () => "sendStatus(status={0}, local={1}".Args(status, m_Home.NodeName.Value)); }
private void sendChallengeAck(byte[] digest) { var obuf = new ErlOutputStream(writeVersion: false, writePktSize: false, capacity: 19); obuf.Write2BE(17); obuf.Write1(CHALLENGE_ACK); obuf.Write(digest); obuf.WriteTo(m_TcpClient.GetStream()); m_Home.OnTrace(ErlTraceLevel.Handshake, Direction.Outbound, () => "sendChallengeAck(digest={1}, local={1}".Args( hex(digest), m_Home.NodeName.Value)); }
private void sendChallengeReply(int challenge, byte[] digest) { var obuf = new ErlOutputStream(writeVersion: false, writePktSize: false, capacity: 23); obuf.Write2BE(21); obuf.Write1(CHALLENGE_REPLY); obuf.Write4BE(challenge); obuf.Write(digest); obuf.WriteTo(m_TcpClient.GetStream()); m_Home.OnTrace(ErlTraceLevel.Handshake, Direction.Outbound, () => "sendChallengeReply(challenge={0}, digest={1}, local={2}".Args( challenge, hex(digest), m_Home.NodeName.Value)); }
private void sendName(int dist, ErlAbstractNode.NodeCompatibility flags) { string str = m_Home.NodeName.Value; var obuf = new ErlOutputStream(writeVersion: false, writePktSize: false, capacity: 7 + str.Length); obuf.Write2BE(str.Length + 7); // 7 bytes + nodename obuf.Write1((int)ErlAbstractNode.NodeType.Ntype_R6); obuf.Write2BE((short)dist); obuf.Write4BE((int)flags); obuf.Write(Encoding.ASCII.GetBytes(str)); obuf.WriteTo(m_TcpClient.GetStream()); m_Home.OnTrace(ErlTraceLevel.Handshake, Direction.Outbound, () => "sendName(flags({0:X2})={1}, dist={2}, local={3}".Args( (int)flags, flags, dist, m_Home.AliveName)); }
private void sendChallenge(int dist, ErlAbstractNode.NodeCompatibility flags, int challenge) { ErlAtom str = m_Home.NodeName; var obuf = new ErlOutputStream(writeVersion: false, writePktSize: false, capacity: 11 + str.Length); obuf.Write2BE((short)str.Length + 11); // 11 bytes + nodename obuf.Write1((byte)ErlAbstractNode.NodeType.Ntype_R6); obuf.Write2BE((short)dist); obuf.Write4BE((int)flags); obuf.Write4BE(challenge); obuf.Write(Encoding.ASCII.GetBytes(str.Value)); obuf.WriteTo(m_Transport.GetStream()); m_Home.OnTrace(ErlTraceLevel.Handshake, Direction.Outbound, () => "sendChallenge(flags({0:X2})={1}, dist={2}, challenge={3}, local={4}".Args( (int)flags, flags, dist, challenge, m_Home.AliveName)); }
private void sendBuf(ErlTuple ctrl, ErlOutputStream payload = null) { if (!m_Connected) throw new ErlException(StringConsts.ERL_CONN_NOT_CONNECTED_ERROR); var header = new ErlOutputStream(writeVersion: false, capacity: HEADER_LEN); // preamble: 4 byte length + "PASS_THROUGH" tag + version header.Write4BE(0); // reserve space for length header.Write1(PASS_THROUGH); header.Write1((byte)ErlExternalTag.Version); // header info header.WriteTuple(ctrl); // version for payload //header.Write1((byte)ErlExternalTag.Version); // Note that it's already written in the payload if (payload == null) { header.Poke4BE(0, (int)(header.Length - 4)); DoSend(header); } else { header.Poke4BE(0, (int)(header.Length + payload.Length - 4)); DoSend(header, payload); } }
private void sendName(int dist, ErlAbstractNode.NodeCompatibility flags) { string str = m_Home.NodeName.Value; var obuf = new ErlOutputStream(writeVersion: false, writePktSize: false, capacity: 7 + str.Length); obuf.Write2BE(str.Length + 7); // 7 bytes + nodename obuf.Write1((int)ErlAbstractNode.NodeType.Ntype_R6); obuf.Write2BE((short)dist); obuf.Write4BE((int)flags); obuf.Write(Encoding.ASCII.GetBytes(str)); obuf.WriteTo(m_Transport.GetStream()); m_Home.OnTrace(ErlTraceLevel.Handshake, Direction.Outbound, () => "sendName(flags({0:X2})={1}, dist={2}, local={3}".Args( (int)flags, flags, dist, m_Home.AliveName)); }
/// <summary> /// Determine what port a node listens for incoming connections on /// </summary> /// <param name="home">Local node</param> /// <param name="node">Remote lode for which to look up the port number from remote EPMD</param> /// <param name="closeSocket">If true, close the connection to remote EPMD at return</param> /// <returns>the listen port for the specified node, or 0 if the node /// was not registered with Epmd</returns> public static int LookupPort(ErlLocalNode home, ErlRemoteNode node, bool closeSocket = false) { IErlTransport s = null; try { var obuf = new ErlOutputStream(writeVersion: false, capacity: 4 + 3 + node.AliveName.Length + 1); s = node.Epmd; if (s == null) { //create transport s = ErlTransportFactory.Create(node.TransportClassName, node.NodeName.Value); s.Trace += (o, t, d, msg) => home.OnTrace(t, d, msg); //append SSH params to transport node.AppendSSHParamsToTransport(s); //connect (I am not sure) s.Connect(node.Host, EPMD_PORT, node.ConnectTimeout); } // build and send epmd request // length[2], tag[1], alivename[n] (length = n+1) obuf.Write2BE(node.AliveName.Length + 1); obuf.Write1((byte)Indicator.Port4req); //UPGRADE_NOTE: This code will be optimized in the future; byte[] buf = Encoding.ASCII.GetBytes(node.AliveName); obuf.Write(buf); // send request obuf.WriteTo(s.GetStream()); home.OnTrace(ErlTraceLevel.Epmd, Direction.Outbound, StringConsts.ERL_EPMD_LOOKUP_R4.Args(node.NodeName.Value)); // 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] buf = new byte[100]; int n = s.GetStream().Read(buf, 0, buf.Length); if (n < 0) throw new ErlException(StringConsts.ERL_EPMD_NOT_RESPONDING.Args(node.Host, node.AliveName)); var ibuf = new ErlInputStream(buf, 0, n, checkVersion: false); if (Indicator.Port4resp == (Indicator)ibuf.Read1()) { if (0 == ibuf.Read1()) { node.Port = ibuf.Read2BE(); node.Ntype = (ErlAbstractNode.NodeType)ibuf.Read1(); node.Proto = ibuf.Read1(); node.DistHigh = ibuf.Read2BE(); node.DistLow = ibuf.Read2BE(); // ignore rest of fields } } if (!closeSocket) { node.Epmd = s; s = null; } } catch (Exception e) { home.OnTrace(ErlTraceLevel.Epmd, Direction.Inbound, StringConsts.ERL_EPMD_INVALID_RESPONSE_ERROR.Args(node.Host, node.AliveName, e.ToString())); throw new ErlException(StringConsts.ERL_EPMD_NOT_RESPONDING.Args(node.Host, node.AliveName, e.ToString())); } finally { if (s != null) try { s.Close(); } catch { } s = null; } home.OnTrace(ErlTraceLevel.Epmd, Direction.Inbound, () => node.Port == 0 ? StringConsts.ERL_EPMD_NOT_FOUND : StringConsts.ERL_EPMD_PORT.Args(node.Port)); return node.Port; }
/// <summary> /// Unregister from Epmd. /// Other nodes wishing to connect will no longer be able to /// </summary> public static void UnPublishPort(ErlLocalNode node) { IErlTransport s = null; try { s = node.Epmd ?? new ErlTcpTransport(ErlLocalNode.LocalHost, EPMD_PORT) { NodeName = node.NodeName.Value }; ErlOutputStream obuf = new ErlOutputStream( writeVersion: false, capacity: node.AliveName.Length + 8); obuf.Write2BE(node.AliveName.Length + 1); obuf.Write1((byte)Indicator.StopReq); var buf = Encoding.ASCII.GetBytes(node.AliveName); obuf.Write(buf); obuf.WriteTo(s.GetStream()); node.OnTrace(ErlTraceLevel.Epmd, Direction.Outbound, () => StringConsts.ERL_EPMD_UNPUBLISH.Args(node.NodeName.Value, node.Port)); } catch { s = null; } finally { if (s != null) try { s.Close(); } catch { } node.Epmd = null; } }
/// <summary> /// Publish node's port at local EPMD, so that other nodes can connect to it. /// /// On failure to connect to EPMD the function may throw if the value of /// ErlApp.IgnoreLocalEpmdConnectErrors variable is true. /// /// On failed connection attempt the function calls /// node.OnEpmdFailedConnectAttempt delegate /// </summary> /// <remarks> /// 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 /// </remarks> public static bool PublishPort(ErlLocalNode node) { Exception error = null; IErlTransport s = null; try { ErlOutputStream obuf = new ErlOutputStream(writeVersion: false, capacity: node.AliveName.Length + 20); s = node.Epmd ?? new ErlTcpTransport(ErlLocalNode.LocalHost, EPMD_PORT) { NodeName = node.NodeName.Value }; obuf.Write2BE(node.AliveName.Length + 13); obuf.Write1((byte)Indicator.Publish4req); obuf.Write2BE(node.Port); obuf.Write1((byte)node.Ntype); obuf.Write1((byte)node.Proto); obuf.Write2BE(node.DistHigh); obuf.Write2BE(node.DistLow); obuf.Write2BE(node.AliveName.Length); var buf = Encoding.ASCII.GetBytes(node.AliveName); //UPGRADE_NOTE: This code will be optimized in the future; obuf.Write(buf); obuf.Write2BE(0); // No extra // send request obuf.WriteTo(s.GetStream()); node.OnTrace(ErlTraceLevel.Epmd, Direction.Outbound, () => StringConsts.ERL_EPMD_PUBLISH.Args(node.AliveName, node.Port, "r4")); // get reply buf = new byte[100]; int n = s.GetStream().Read(buf, 0, buf.Length); if (n < 0) // this was an r3 node => not a failure (yet) throw new ErlException(StringConsts.ERL_EPMD_NOT_RESPONDING.Args(node.Host, node.AliveName)); ErlInputStream ibuf = new ErlInputStream(buf, 0, n, checkVersion: false); if (Indicator.Publish4resp == (Indicator)ibuf.Read1()) { int result = ibuf.Read1(); if (result == 0) { node.Creation = (byte)ibuf.Read2BE(); node.OnTrace(ErlTraceLevel.Epmd, Direction.Inbound, StringConsts.ERL_EPMD_OK); node.Epmd = s; return true; // success } } error = new ErlException("Cannot register node '{0}' (not unique?)".Args(node.AliveName)); } catch (Exception e) { error = e; } // epmd closed the connection = fail if (s != null) try { s.Close(); } catch { } node.Epmd = null; node.OnTrace(ErlTraceLevel.Epmd, Direction.Inbound, StringConsts.ERL_EPMD_NO_RESPONSE); node.OnEpmdFailedConnectAttempt(node.NodeName, error.Message); node.OnTrace(ErlTraceLevel.Epmd, Direction.Inbound, StringConsts.ERL_EPMD_FAILED_TO_CONNECT_ERROR); if (!ErlApp.IgnoreLocalEpmdConnectErrors) throw new ErlException(StringConsts.ERL_EPMD_FAILED_TO_CONNECT_ERROR + ": " + error.Message); node.Creation = 0; return false; }
/// <summary> /// Determine what port a node listens for incoming connections on /// </summary> /// <param name="home">Local node</param> /// <param name="node">Remote lode for which to look up the port number from remote EPMD</param> /// <param name="closeSocket">If true, close the connection to remote EPMD at return</param> /// <returns>the listen port for the specified node, or 0 if the node /// was not registered with Epmd</returns> public static int LookupPort(ErlLocalNode home, ErlRemoteNode node, bool closeSocket = false) { TcpClient s = null; try { var obuf = new ErlOutputStream( writeVersion: false, capacity: 4 + 3 + node.AliveName.Length + 1); s = node.Epmd ?? new TcpClient(node.Host, EPMD_PORT); // build and send epmd request // length[2], tag[1], alivename[n] (length = n+1) obuf.Write2BE(node.AliveName.Length + 1); obuf.Write1((byte)Indicator.Port4req); //UPGRADE_NOTE: This code will be optimized in the future; byte[] buf = Encoding.ASCII.GetBytes(node.AliveName); obuf.Write(buf); // send request obuf.WriteTo(s.GetStream()); home.Trace(ErlTraceLevel.Epmd, Direction.Outbound, StringConsts.ERL_EPMD_LOOKUP_R4.Args(node.NodeName.Value)); // 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] buf = new byte[100]; int n = s.GetStream().Read(buf, 0, buf.Length); if (n < 0) { throw new ErlException(StringConsts.ERL_EPMD_NOT_RESPONDING.Args(node.Host, node.AliveName)); } var ibuf = new ErlInputStream(buf, 0, n, checkVersion: false); if (Indicator.Port4resp == (Indicator)ibuf.Read1()) { if (0 == ibuf.Read1()) { node.Port = ibuf.Read2BE(); node.Ntype = (ErlAbstractNode.NodeType)ibuf.Read1(); node.Proto = ibuf.Read1(); node.DistHigh = ibuf.Read2BE(); node.DistLow = ibuf.Read2BE(); // ignore rest of fields } } if (!closeSocket) { node.Epmd = s; s = null; } } catch (Exception) { home.Trace(ErlTraceLevel.Epmd, Direction.Inbound, StringConsts.ERL_EPMD_INVALID_RESPONSE_ERROR); throw new ErlException(StringConsts.ERL_EPMD_NOT_RESPONDING.Args(node.Host, node.AliveName)); } finally { if (s != null) { try { s.Close(); } catch {} } s = null; } home.Trace(ErlTraceLevel.Epmd, Direction.Inbound, () => node.Port == 0 ? StringConsts.ERL_EPMD_NOT_FOUND : StringConsts.ERL_EPMD_PORT.Args(node.Port)); return(node.Port); }
/// <summary> /// Publish node's port at local EPMD, so that other nodes can connect to it. /// /// On failure to connect to EPMD the function may throw if the value of /// ErlApp.IgnoreLocalEpmdConnectErrors variable is true. /// /// On failed connection attempt the function calls /// node.OnEpmdFailedConnectAttempt delegate /// </summary> /// <remarks> /// 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 /// </remarks> public static bool PublishPort(ErlLocalNode node) { Exception error = null; TcpClient s = null; try { ErlOutputStream obuf = new ErlOutputStream( writeVersion: false, capacity: node.AliveName.Length + 20); s = node.Epmd ?? new TcpClient(ErlLocalNode.LocalHost, EPMD_PORT); obuf.Write2BE(node.AliveName.Length + 13); obuf.Write1((byte)Indicator.Publish4req); obuf.Write2BE(node.Port); obuf.Write1((byte)node.Ntype); obuf.Write1((byte)node.Proto); obuf.Write2BE(node.DistHigh); obuf.Write2BE(node.DistLow); obuf.Write2BE(node.AliveName.Length); var buf = Encoding.ASCII.GetBytes(node.AliveName); //UPGRADE_NOTE: This code will be optimized in the future; obuf.Write(buf); obuf.Write2BE(0); // No extra // send request obuf.WriteTo(s.GetStream()); node.Trace(ErlTraceLevel.Epmd, Direction.Outbound, () => StringConsts.ERL_EPMD_PUBLISH.Args(node.AliveName, node.Port, "r4")); // get reply buf = new byte[100]; int n = s.GetStream().Read(buf, 0, buf.Length); if (n < 0) { // this was an r3 node => not a failure (yet) throw new ErlException(StringConsts.ERL_EPMD_NOT_RESPONDING.Args(node.Host, node.AliveName)); } ErlInputStream ibuf = new ErlInputStream(buf, 0, n, checkVersion: false); if (Indicator.Publish4resp == (Indicator)ibuf.Read1()) { int result = ibuf.Read1(); if (result == 0) { node.Creation = (byte)ibuf.Read2BE(); node.Trace(ErlTraceLevel.Epmd, Direction.Inbound, StringConsts.ERL_EPMD_OK); node.Epmd = s; return(true); // success } } error = new ErlException("Cannot register node '{0}' (not unique?)".Args(node.AliveName)); } catch (Exception e) { error = e; } // epmd closed the connection = fail if (s != null) { try { s.Close(); } catch {} } node.Epmd = null; node.Trace(ErlTraceLevel.Epmd, Direction.Inbound, StringConsts.ERL_EPMD_NO_RESPONSE); node.OnEpmdFailedConnectAttempt(node.NodeName, error.Message); node.Trace(ErlTraceLevel.Epmd, Direction.Inbound, StringConsts.ERL_EPMD_FAILED_TO_CONNECT_ERROR); if (!ErlApp.IgnoreLocalEpmdConnectErrors) { throw new ErlException(error.Message); } node.Creation = 0; return(false); }
private void sendChallengeAck(byte[] digest) { var obuf = new ErlOutputStream(writeVersion: false, writePktSize: false, capacity: 19); obuf.Write2BE(17); obuf.Write1(CHALLENGE_ACK); obuf.Write(digest); obuf.WriteTo(m_Transport.GetStream()); m_Home.OnTrace(ErlTraceLevel.Handshake, Direction.Outbound, () => "sendChallengeAck(digest={1}, local={1}".Args( hex(digest), m_Home.NodeName.Value)); }
private void sendChallengeReply(int challenge, byte[] digest) { var obuf = new ErlOutputStream(writeVersion: false, writePktSize: false, capacity: 23); obuf.Write2BE(21); obuf.Write1(CHALLENGE_REPLY); obuf.Write4BE(challenge); obuf.Write(digest); obuf.WriteTo(m_Transport.GetStream()); m_Home.OnTrace(ErlTraceLevel.Handshake, Direction.Outbound, () => "sendChallengeReply(challenge={0}, digest={1}, local={2}".Args( challenge, hex(digest), m_Home.NodeName.Value)); }
/// <summary> /// 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 /// </summary> private void cookieError(ErlLocalNode local, ErlAtom cookie) { var header = new ErlOutputStream(writeVersion: false, capacity: HEADER_LEN); // preamble: 4 byte length + "PASS_THROUGH" tag + version header.Write4BE(0); // reserve space for length header.Write1(PASS_THROUGH); header.Write1((byte)ErlExternalTag.Version); header.WriteTupleHead(4); header.WriteLong((long)ErlMsg.Tag.RegSend); header.WritePid(local.CreatePid()); // disposable pid header.WriteAtom(cookie); // important: his cookie, not mine... header.WriteAtom("auth"); // version for payload written later by the payload stream //header.Write1((byte)ErlExternalTag.Version); // the payload // the no_auth message (copied from Erlang) Don't change this (Erlang will crash) // {$gen_cast, {print, "~n** Unauthorized cookie ~w **~n", [foo@aule]}} var msg = ErlObject.Parse( "{'$gen_cast', {print, \"\n** Unauthorized cookie ~w **\n\", [" + local.NodeName.Value + "]}}"); var payload = new ErlOutputStream(msg, writeVersion: true); // fix up length in preamble header.Poke4BE(0, (int)(header.Length + payload.Length - 4)); try { DoSend(header, payload); } catch (Exception e) { Close(); throw new ErlException(StringConsts.ERL_CONN_UNAUTH_COOKIE_ERROR.Args(cookie.Value), e); } }
private void sendStatus(string status) { var obuf = new ErlOutputStream(writeVersion: false, writePktSize: false, capacity: 19); obuf.Write2BE(status.Length + 1); obuf.Write1(CHALLENGE_STATUS); obuf.Write(Encoding.ASCII.GetBytes(status)); obuf.WriteTo(m_Transport.GetStream()); m_Home.OnTrace(ErlTraceLevel.Handshake, Direction.Outbound, () => "sendStatus(status={0}, local={1}".Args(status, m_Home.NodeName.Value)); }
private void sendChallenge(int dist, ErlAbstractNode.NodeCompatibility flags, int challenge) { ErlAtom str = m_Home.NodeName; var obuf = new ErlOutputStream(writeVersion: false, writePktSize: false, capacity: 11 + str.Length); obuf.Write2BE((short)str.Length + 11); // 11 bytes + nodename obuf.Write1((byte)ErlAbstractNode.NodeType.Ntype_R6); obuf.Write2BE((short)dist); obuf.Write4BE((int)flags); obuf.Write4BE(challenge); obuf.Write(Encoding.ASCII.GetBytes(str.Value)); obuf.WriteTo(m_TcpClient.GetStream()); m_Home.Trace(ErlTraceLevel.Handshake, Direction.Outbound, () => "sendChallenge(flags({0:X2})={1}, dist={2}, challenge={3}, local={4}".Args( (int)flags, flags, dist, challenge, m_Home.AliveName)); }