// 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)
{
TcpClient s = null;
try
{
s = new TcpClient(System.Net.Dns.GetHostName(), epmdPort);
OtpOutputStream obuf = new OtpOutputStream();
obuf.write2BE(node.getAlive().Length + 1);
obuf.write1(stopReq);
//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.writeTo((System.IO.Stream)s.GetStream());
// don't even wait for a response (is there one?)
if (traceLevel >= traceThreshold)
{
OtpTrace.TraceEvent("-> UNPUBLISH " + node + " port=" + node.port());
OtpTrace.TraceEvent("<- OK (assumed)");
}
}
catch (System.Exception)
{
/*ignore all failures */
}
finally
{
try
{
if (s != null)
{
s.Close();
}
}
catch (System.IO.IOException)
{
/*ignore close failure */
}
s = null;
}
}
/*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 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
}
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);
}
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);
}
static public void Main(String[] args)
{
OtpTrace.TraceEvent("Otp test...");
if (args.Length < 1)
{
OtpTrace.TraceEvent("Usage: Otp sname\n where sname is" +
"the short name of the Erlang node");
return;
}
String host = System.Net.Dns.GetHostName();
String remote = args[0] + "@" + host;
OtpNode node = new OtpNode("q@" + host);
OtpTrace.TraceEvent("This node is called {0} and is using cookie='{1}'.",
node.node(), node.cookie());
bool ok = false;
ok = node.ping(remote, 1000);
if (ok)
{
OtpTrace.TraceEvent(" successfully pinged node " + remote + "\n");
}
else
{
OtpTrace.TraceEvent(" could not ping node " + remote + "\n");
}
OtpMbox mbox = null;
try
{
mbox = node.createMbox();
Erlang.Object[] rpc = new Erlang.Object[2];
Erlang.Object[] call = new Erlang.Object[5];
call[0] = new Erlang.Atom("call");
call[1] = new Erlang.Atom("lists");
call[2] = new Erlang.Atom("reverse");
call[3] = new Erlang.List(new Erlang.List("Hello Erlang world!"));
call[4] = mbox.self();
rpc[0] = mbox.self();
rpc[1] = new Erlang.Tuple(call);
Erlang.Tuple rpcTuple = new Erlang.Tuple(rpc);
OtpTrace.TraceEvent("=> " + rpcTuple.ToString());
mbox.send("rex", remote, rpcTuple);
Erlang.Object reply = mbox.receive(1000);
OtpTrace.TraceEvent("<= " + reply.ToString());
}
catch (System.Exception)
{
}
finally
{
node.closeMbox(mbox);
}
node.close();
}
