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 }
/*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); } }
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); }
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; }
/*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; }
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; }
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; }
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 }