[Mono-bugs] [Bug 60226][Nor] New - Remoting between Windows and Linux does not work when Windows is the Server

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Changed by clintp_bugzilla@geeksalad.org.

http://bugzilla.ximian.com/show_bug.cgi?id=60226

--- shadow/60226	2004-06-15 15:33:07.000000000 -0400
+++ shadow/60226.tmp.24420	2004-06-15 15:33:07.000000000 -0400
@@ -0,0 +1,156 @@
+Bug#: 60226
+Product: Mono: Class Libraries
+Version: unspecified
+OS: 
+OS Details: Win32 = Win2k, Linux = Kernel 2.4.18 Debian
+Status: NEW   
+Resolution: 
+Severity: 
+Priority: Normal
+Component: System
+AssignedTo: mono-bugs@ximian.com                            
+ReportedBy: clintp_bugzilla@geeksalad.org               
+QAContact: mono-bugs@ximian.com
+TargetMilestone: ---
+URL: 
+Cc: 
+Summary: Remoting between Windows and Linux does not work when Windows is the Server
+
+Please fill in this template when reporting a bug, unless you know what 
+you are doing.
+Description of Problem:
+
+This is identical in setup to bug 59835 except that the server is Windows, 
+the Client is Linux.  I did not test this configuration in 59835 because 
+of firewalls.   The error reported is:
+
+**** System.NullReferenceException - Object reference not set to an 
+instance of an object.
+
+
+Steps to reproduce the problem:
+  ** These steps assume a Windows server, Linux Client **
+1. Compile this code to a DLL named ICalc.dll on the Windows system.  
+
+using System;
+namespace MyServer
+{
+    public interface ICalc
+    {
+        double Add(double x, double y);
+        double Mult(double x, double y);
+    }
+
+}
+
+2. Move the DLL to the Linux system
+3. Compile this code on the Windows system, using the DLL in step 1 as a 
+resource:
+
+using System;
+using System.Runtime.Remoting;
+using System.Runtime.Remoting.Channels;
+using System.Runtime.Remoting.Channels.Http;
+namespace MyServer
+{
+       public class Calculator : MarshalByRefObject, ICalc
+       {
+                public Calculator()
+                {
+                        Console.WriteLine("Calculator Constructor...");
+                }
+                public double Add(double x, double y)
+                {
+                        Console.WriteLine("Called add...");
+                        return x + y;
+                }
+                public double Mult(double x, double y)
+                {
+                        Console.WriteLine("Called mult...");
+                        return x * y;
+               }
+        }
+        public class ServerTest
+        {
+                public static void Main()
+                {
+                        HttpChannel chan = new HttpChannel(65100);
+                        ChannelServices.RegisterChannel(chan);
+                        Type calcType =
+                                Type.GetType("MyServer.Calculator");
+                        
+RemotingConfiguration.RegisterWellKnownServiceType
+                                (calcType, "theEndPoint",
+                                        WellKnownObjectMode.SingleCall);
+                        Console.WriteLine("Press [enter] to exit...");
+                        Console.ReadLine();
+                }
+        }
+}
+
+
+4. Compile this code on the Linux system -- changing the IP address to 
+the Windows server's -- using the DLL in step 1 as a resource:
+
+using System;
+using System.Runtime.Remoting;
+using System.Runtime.Remoting.Channels;
+using System.Runtime.Remoting.Channels.Http;
+namespace MyServer
+{
+        class Class1
+        {
+                [STAThread]
+                static void Main(string[] args)
+                {
+                        HttpChannel chan = new HttpChannel(0);
+                        ChannelServices.RegisterChannel(chan);
+                        MarshalByRefObject obj = (MarshalByRefObject)
+                                        
+RemotingServices.Connect(typeof(MyServer.ICalc),
+                                                
+"http://windows.server.ip.address:65100/theEndPoint");
+                        try
+                        {
+                                MyServer.ICalc calc = obj as 
+MyServer.ICalc;
+                                double sum = calc.Add((double)3.0, 
+(double)4.0);
+                                Console.WriteLine("Sum: " + sum.ToString
+());
+                        }
+                        catch (System.Exception ex)
+                        {
+                                Console.WriteLine("Exception caught: \n" 
++ ex.Message);
+                        }
+                        return;
+                }
+        }
+}
+
+5. Start the Windows server (you may want to verify that it is bound to 
+port 65100)
+
+6. Start the Linux client, wait for error message.
+
+Actual Results:
+
+**** System.NullReferenceException - Object reference not set to an 
+instance of an object.
+
+
+Expected Results:
+Sum: 7
+
+How often does this happen? 
+Every time.
+
+Additional Information:
+I stumbled across this on a much different (and larger) example, but with 
+identical results (NullReferenceException).  In both cases the object 
+returned at:
+
+          MyServer.ICalc calc = obj as MyServer.ICalc;
+
+Is not null, and is the right type.