Imported Upstream version 5.18.0.142

Former-commit-id: 7467d4b717762eeaf652d77f1486dd11ffb1ff1f

mcs/class/System/System.Net.NetworkInformation/LinuxIPv4InterfaceProperties.cs

@@ -0,0 +1,73 @@
+//
+// System.Net.NetworkInformation.IPv4InterfaceProperties
+//
+// Authors:
+//	Gonzalo Paniagua Javier (gonzalo@novell.com)
+//	Atsushi Enomoto (atsushi@ximian.com)
+//      Marek Habersack (mhabersack@novell.com)
+//
+// Copyright (c) 2006-2007 Novell, Inc. (http://www.novell.com)
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+// 
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+using System.IO;
+
+namespace System.Net.NetworkInformation {
+	sealed class LinuxIPv4InterfaceProperties : UnixIPv4InterfaceProperties
+	{
+		public LinuxIPv4InterfaceProperties (LinuxNetworkInterface iface)
+			: base (iface)
+		{
+		}
+
+		public override bool IsForwardingEnabled {
+			get {
+				string iface_path = "/proc/sys/net/ipv4/conf/" + iface.Name + "/forwarding";
+
+				if (File.Exists (iface_path)) {
+					string val = LinuxNetworkInterface.ReadLine (iface_path);
+
+					return val != "0";
+				}
+
+				return false;
+			}
+		}
+
+		public override int Mtu {
+			get {
+				string iface_path = (iface as LinuxNetworkInterface).IfacePath + "mtu";
+				int ret = 0;
+
+				if (File.Exists (iface_path)) {
+					string val = LinuxNetworkInterface.ReadLine (iface_path);
+
+					try {
+						ret = Int32.Parse (val);
+					} catch {
+					}
+				}
+
+				return ret;
+
+			}
+		}
+	}
+}