// 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;
}
}
/*
* Register with Epmd, so that other nodes are able to find and
* connect to it.
*
* @param node the server node that should be registered with Epmd.
*
* @return true if the operation was successful. False if the node
* was already registered.
*
* @exception C#.io.IOException if there was no response from the
* name server.
**/
public static bool publishPort(OtpLocalNode node)
{
System.Net.Sockets.TcpClient s = null;
try
{
s = r4_publish(node);
}
catch (System.IO.IOException)
{
s = r3_publish(node);
}
node.setEpmd(s);
return(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
}
/*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
*/
private void cookieError(OtpLocalNode local, Erlang.Atom cookie)
{
try
{
OtpOutputStream header = new OtpOutputStream(headerLen);
// preamble: 4 byte length + "passthrough" tag + version
header.write4BE(0); // reserve space for length
header.write1(passThrough);
header.write1(version);
header.write_tuple_head(4);
header.write_long((long)OtpMsg.Tag.regSendTag);
header.write_any(local.createPid()); // disposable pid
header.write_atom(cookie.atomValue()); // important: his cookie, not mine...
header.write_atom("auth");
// version for payload
header.write1(version);
// the payload
// the no_auth message (copied from Erlang) Don't change this (Erlang will crash)
// {$gen_cast, {print, "~n** Unauthorized cookie ~w **~n", [foo@aule]}}
Erlang.Object[] msg = new Erlang.Object[2];
Erlang.Object[] msgbody = new Erlang.Object[3];
msgbody[0] = new Erlang.Atom("print");
msgbody[1] = new Erlang.String("~n** Bad cookie sent to " + local + " **~n");
// Erlang will crash and burn if there is no third argument here...
msgbody[2] = new Erlang.List(); // empty list
msg[0] = new Erlang.Atom("$gen_cast");
msg[1] = new Erlang.Tuple(msgbody);
OtpOutputStream payload = new OtpOutputStream(new Erlang.Tuple(msg));
// fix up length in preamble
header.poke4BE(0, header.count() + payload.count() - 4);
try
{
do_send(header, payload);
}
catch (System.IO.IOException)
{
} // ignore
}
finally
{
close();
throw new OtpAuthException("Remote cookie not authorized: " + cookie.atomValue());
}
}
/*
* Intiate and open a connection to a remote node.
*
* @exception C#.io.IOException if it was not possible to connect to the peer.
* @exception OtpAuthException if handshake resulted in an authentication error.
*/
protected internal AbstractConnection(OtpLocalNode self, OtpPeer other)
: this(self, other, self.cookie())
{
}
/*
* Intiate and open a connection to a remote node.
*
* @exception C#.io.IOException if it was not possible to connect to the peer.
* @exception OtpAuthException if handshake resulted in an authentication error.
*/
protected internal AbstractConnection(OtpLocalNode self, OtpPeer other, string cookie)
{
this.peer = other;
this.self = self;
this.socket = null;
this.auth_cookie = cookie;
//this.IsBackground = true;
// now get a connection between the two...
int port = OtpEpmd.lookupPort(peer);
// now find highest common dist value
if ((peer._proto != self._proto) || (self._distHigh < peer._distLow) || (self._distLow > peer._distHigh))
{
throw new System.IO.IOException("No common protocol found - cannot connect");
}
// highest common version: min(peer.distHigh, self.distHigh)
peer.distChoose = (peer._distHigh > self._distHigh ? self._distHigh : peer._distHigh);
doConnect(port);
this.name = peer.node();
this.connected = true;
}
private AbstractConnection(OtpLocalNode self, OtpPeer peer, System.Net.Sockets.TcpClient s, string cookie)
{
this.peer = peer;
this.self = self;
this.socket = s;
this.auth_cookie = cookie ?? self._cookie;
this.sentBytes = 0;
this.receivedBytes = 0;
this.maxPayloadLength = defaultMaxPayloadLength;
}
/*
* Accept an incoming connection from a remote node. Used by {@link
* OtpSelf#accept() OtpSelf.accept()} to create a connection
* based on data received when handshaking with the peer node, when
* the remote node is the connection intitiator.
*
* @exception C#.io.IOException if it was not possible to connect to the peer.
* @exception OtpAuthException if handshake resulted in an authentication error
*/
protected internal AbstractConnection(OtpLocalNode self, System.Net.Sockets.TcpClient s)
{
this.self = self;
this.peer = new OtpPeer();
this.socket = s;
this.auth_cookie = self.cookie();
this.socket.NoDelay = true;
// Use keepalive timer
this.socket.Client.SetSocketOption(
System.Net.Sockets.SocketOptionLevel.Socket,
System.Net.Sockets.SocketOptionName.KeepAlive, true);
// Close socket gracefully
this.socket.Client.SetSocketOption(
System.Net.Sockets.SocketOptionLevel.Socket,
System.Net.Sockets.SocketOptionName.DontLinger, true);
//this.socket.ReceiveTimeout = 5000;
if (traceLevel >= OtpTrace.Type.handshakeThreshold)
{
OtpTrace.TraceEvent("<- ACCEPT FROM " +
System.Net.IPAddress.Parse(s.Client.RemoteEndPoint.ToString()).ToString() + ":" +
(s.Client.RemoteEndPoint as System.Net.IPEndPoint).Port.ToString());
}
// get his info
recvName(this.peer);
// now find highest common dist value
if ((peer._proto != self._proto) || (self._distHigh < peer._distLow) || (self._distLow > peer._distHigh))
{
close();
throw new System.IO.IOException("No common protocol found - cannot accept connection");
}
// highest common version: min(peer.distHigh, self.distHigh)
peer.distChoose = (peer._distHigh > self._distHigh?self._distHigh:peer._distHigh);
doAccept();
this.name = peer.node();
}
/*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;
}
// 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)
{
System.Console.Out.WriteLine("-> UNPUBLISH " + node + " port=" + node.port());
System.Console.Out.WriteLine("<- OK (assumed)");
}
}
catch (System.Exception)
{
/*ignore all failures */
}
finally
{
try
{
if (s != null)
s.Close();
}
catch (System.IO.IOException)
{
/*ignore close failure */
}
s = null;
}
}
/*
* Register with Epmd, so that other nodes are able to find and
* connect to it.
*
* @param node the server node that should be registered with Epmd.
*
* @return true if the operation was successful. False if the node
* was already registered.
*
* @exception C#.io.IOException if there was no response from the
* name server.
**/
public static bool publishPort(OtpLocalNode node)
{
System.Net.Sockets.TcpClient s = null;
try
{
s = r4_publish(node);
}
catch (System.IO.IOException)
{
s = r3_publish(node);
}
node.setEpmd(s);
return (s != null);
}
/*
* Accept an incoming connection from a remote node. Used by {@link
* OtpSelf#accept() OtpSelf.accept()} to create a connection
* based on data received when handshaking with the peer node, when
* the remote node is the connection intitiator.
*
* @exception C#.io.IOException if it was not possible to connect to the peer.
* @exception OtpAuthException if handshake resulted in an authentication error
*/
protected internal AbstractConnection(OtpLocalNode self, System.Net.Sockets.TcpClient s)
{
this.self = self;
this.peer = new OtpPeer();
this.socket = s;
this.socket.NoDelay = true;
this.traceLevel = defaultLevel;
if (traceLevel >= handshakeThreshold)
{
System.Console.Out.WriteLine("<- ACCEPT FROM ?");
/*
System.Net.Sockets.Socket sock = s.Client;
//UPGRADE_TODO: Expression C#.net.Socket.getInetAddress could not be converted.;
//UPGRADE_TODO: Expression C#.net.Socket.getPort could not be converted.;
System.Console.Out.WriteLine("<- ACCEPT FROM " +
IPAddress.Parse(((IPEndPoint)s.RemoteEndPoint).Address.ToString())+ ":" +
((IPEndPoint)s.RemoteEndPoint).Port.ToString());
*/
}
// get his info
recvName(this.peer);
// now find highest common dist value
if ((peer._proto != self._proto) || (self._distHigh < peer._distLow) || (self._distLow > peer._distHigh))
{
close();
throw new System.IO.IOException("No common protocol found - cannot accept connection");
}
// highest common version: min(peer.distHigh, self.distHigh)
peer.distChoose = (peer._distHigh > self._distHigh?self._distHigh:peer._distHigh);
doAccept();
this.name = peer.node();
}
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
}
