* Implement basic region filtering as described in https://lists.berlios.de/pipermail/opensim-dev/2008-November/003468.html

* This is done by sending a 'major interface version' number on sim registration.  Developers must increment this every time they make a change that would make the previous 
OpenSim revision failure incompatible with the new one (non-fatal incompatibilities are fine).
* This number resides in OpenSim.Framework.Servers.VersionInfo.MajorInterfaceVersion
* This allows the grid service to stop older, incompatible regions from connecting

3 files changed, 46 insertions, 22 deletions

diff --git a/OpenSim/Framework/Servers/BaseOpenSimServer.cs b/OpenSim/Framework/Servers/BaseOpenSimServer.cs
index 36f8d2e..aa93f6e 100644
--- a/OpenSim/Framework/Servers/BaseOpenSimServer.cs
+++ b/OpenSim/Framework/Servers/BaseOpenSimServer.cs
@@ -428,25 +428,6 @@ namespace OpenSim.Framework.Servers
             }
 
             m_version += string.IsNullOrEmpty(buildVersion) ? "      " : ("." + buildVersion + "     ").Substring(0, 6);
-
-            // Add operating system information if available
-            string OSString = "";
-
-            if (System.Environment.OSVersion.Platform != PlatformID.Unix)
-            {
-                OSString = System.Environment.OSVersion.ToString();
-            }
-            else
-            {
-                OSString = Util.ReadEtcIssue();
-            }
-
-            if (OSString.Length > 45)
-            {
-                OSString = OSString.Substring(0, 45);
-            }
-
-            m_version += " (OS " + OSString + ")";
         }
     }
 }
diff --git a/OpenSim/Framework/Servers/VersionInfo.cs b/OpenSim/Framework/Servers/VersionInfo.cs
index 8f84859..c6a43ec 100644
--- a/OpenSim/Framework/Servers/VersionInfo.cs
+++ b/OpenSim/Framework/Servers/VersionInfo.cs
@@ -27,11 +27,27 @@
 
 namespace OpenSim
 {
-    /// <summary>
-    /// This is the OpenSim version string.  Change this if you are releasing a new OpenSim version.
-    /// </summary>
     public class VersionInfo
     {
+        /// <value>
+        /// This is the OpenSim version string.  Change this if you are releasing a new OpenSim version.
+        /// </value>        
         public readonly static string Version = "OpenSimulator Server  0.6.0";  // stay with 27 chars (used in regioninfo)
+        
+        /// <value>
+        /// This is the external interface version.  It is separate from the OpenSimulator project version.  
+        /// 
+        /// This version number should be 
+        /// increased by 1 every time a code change makes the previous OpenSimulator revision incompatible
+        /// with the new revision.  This will usually be due to interregion or grid facing interface changes.
+        /// 
+        /// Changes which are compatible with an older revision (e.g. older revisions experience degraded functionality
+        /// but not outright failure) do not need a version number increment.
+        /// 
+        /// Having this version number allows the grid service to reject connections from regions running a version
+        /// of the code that is too old. 
+        ///   
+        /// </value>
+        public readonly static int MajorInterfaceVersion = 0;
     }
 }
diff --git a/OpenSim/Framework/Util.cs b/OpenSim/Framework/Util.cs
index 7caa414..f72797f 100644
--- a/OpenSim/Framework/Util.cs
+++ b/OpenSim/Framework/Util.cs
@@ -799,6 +799,33 @@ namespace OpenSim.Framework
             x += rx;
             y += ry;
         }
+        
+        /// <summary>
+        /// Get operating system information if available.  Returns only the first 45 characters of information
+        /// </summary>
+        /// <returns>
+        /// Operating system information.  Returns an empty string if none was available.
+        /// </returns>
+        public static string GetOperatingSystemInformation()
+        {
+            string os = String.Empty;
+
+            if (System.Environment.OSVersion.Platform != PlatformID.Unix)
+            {
+                os = System.Environment.OSVersion.ToString();
+            }
+            else
+            {
+                os = ReadEtcIssue();
+            }         
+                      
+            if (os.Length > 45)
+            {
+                os = os.Substring(0, 45);
+            }
+            
+            return os;
+        }
 
         /// <summary>
         /// Is the given string a UUID?