Added various dotnet methods required for server configuration (#216)

- Added the ability to set/read URCB buffer size in dotnet.
-  Added IedServer_getNumberOfOpenConnections, ClientConnection_getLocalAddress and server identity methods for dotnet.
Co-authored-by: Andrew Moorcroft <andrew.moorcroft@nortechonline.co.uk>

dotnet/IEC61850forCSharp/IEC61850ServerAPI.cs

@@ -837,6 +837,9 @@ namespace IEC61850
 			[DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
 			static extern IntPtr ClientConnection_getPeerAddress(IntPtr self);
 
+			[DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
+			static extern IntPtr ClientConnection_getLocalAddress(IntPtr self);
+
 			internal IntPtr self;
 
 			internal ClientConnection (IntPtr self) {
@@ -852,6 +855,16 @@ namespace IEC61850
 				else
 					return null;
 			}
+
+			public string GetLocalAddress()
+			{
+				IntPtr localAddrPtr = ClientConnection_getLocalAddress(self);
+
+				if (localAddrPtr != IntPtr.Zero)
+					return Marshal.PtrToStringAnsi(localAddrPtr);
+				else
+					return null;
+			}
 		}
 
         /// <summary>
@@ -1065,6 +1078,9 @@ namespace IEC61850
 			[return: MarshalAs(UnmanagedType.Bool)]
 			static extern bool IedServer_isRunning(IntPtr self);
 
+			[DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
+			static extern int IedServer_getNumberOfOpenConnections(IntPtr self);
+
 			[DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
 			static extern void IedServer_lockDataModel(IntPtr self);
 
@@ -1395,6 +1411,15 @@ namespace IEC61850
                 return IedServer_isRunning(self);
             }
 
+			/// <summary>
+			/// Get number of open MMS connections
+			/// </summary>
+			/// <returns>the number of open and accepted MMS connections</returns>
+			public int GetNumberOfOpenConnections()
+			{
+				return IedServer_getNumberOfOpenConnections(self);
+			}
+
             private ControlHandlerInfo GetControlHandlerInfo(DataObject controlObject)
 			{
 				ControlHandlerInfo info;

dotnet/IEC61850forCSharp/IedServerConfig.cs

@@ -44,6 +44,12 @@ namespace IEC61850.Server
 		[DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
 		static extern int IedServerConfig_getReportBufferSize(IntPtr self);
 
+		[DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
+		static extern void IedServerConfig_setReportBufferSizeForURCBs(IntPtr self, int reportBufferSize);
+
+		[DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
+		static extern int IedServerConfig_getReportBufferSizeForURCBs(IntPtr self);
+
 		[DllImport("iec61850", CallingConvention = CallingConvention.Cdecl)]
 		static extern void IedServerConfig_setFileServiceBasePath(IntPtr self, string basepath);
 
@@ -122,6 +128,22 @@ namespace IEC61850.Server
 			}
 		}
 
+		/// <summary>
+		/// Gets or sets the size of the report buffer for unbuffered report control blocks
+		/// </summary>
+		/// <value>The size of the report buffer.</value>
+		public int ReportBufferSizeForURCBs
+		{
+			get
+			{
+				return IedServerConfig_getReportBufferSizeForURCBs(self);
+			}
+			set
+			{
+				IedServerConfig_setReportBufferSizeForURCBs(self, value);
+			}
+		}
+
 		/// <summary>
 		/// Gets or sets the file service base path.
 		/// </summary>