/*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);
}
}
/*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;
}
