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());
}
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 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 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 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;
}
/*
* Determine what port a node listens for incoming connections on.
*
* @return the listen port for the specified node, or 0 if the node
* was not registered with Epmd.
*
* @exception C#.io.IOException if there was no response from the
* name server.
**/
public static int lookupPort(AbstractNode node)
{
try
{
return r4_lookupPort(node);
}
catch (System.IO.IOException)
{
return r3_lookupPort(node);
}
}