Import lwIP contrib rep

... from http://git.savannah.gnu.org/cgit/lwip/lwip-contrib.git/ into contrib/ subdir, STABLE-2_1_0_RELEASE tag
lwIP contrib is now officially frozen
TODO: Fix build

contrib/apps/LwipMibCompiler/SharpSnmpLib/Mib/Elements/Entities/IEntity.cs

@@ -0,0 +1,62 @@
+// Entity interface.
+// Copyright (C) 2008-2010 Malcolm Crowe, Lex Li, and other contributors.
+// 
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; either
+// version 2.1 of the License, or (at your option) any later version.
+// 
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+// 
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+/*
+ * Created by SharpDevelop.
+ * User: lextm
+ * Date: 2008/5/19
+ * Time: 20:10
+ * 
+ * To change this template use Tools | Options | Coding | Edit Standard Headers.
+ */
+
+using System;
+
+namespace Lextm.SharpSnmpLib.Mib.Elements.Entities
+{
+    /// <summary>
+    /// Basic interface for all elements building up the MIB tree, thus having an OID as value.
+    /// </summary>
+    public interface IEntity : IDeclaration
+    {
+        /// <summary>
+        /// Parent name.
+        /// </summary>
+        string Parent
+        {
+            get;
+            set;
+        }
+        
+        /// <summary>
+        /// Value.
+        /// </summary>
+        uint Value
+        {
+            get;            
+        }
+
+        /// <summary>
+        /// Gets the description.
+        /// </summary>
+        /// <value>The description.</value>
+        string Description
+        {
+            get;
+        }
+    }
+}