//
// System.Net.NetworkInformation.IPv4InterfaceStatistics
//
// Authors:
//	Gonzalo Paniagua Javier (gonzalo@novell.com)
//	Atsushi Enomoto (atsushi@ximian.com)
//	Miguel de Icaza (miguel@ximian.com)
//
// Copyright (c) 2006-2008 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.
//
namespace System.Net.NetworkInformation {
	public abstract class IPv4InterfaceStatistics {
		protected IPv4InterfaceStatistics ()
		{
		}
		
		public abstract long BytesReceived { get; }
		public abstract long BytesSent { get; }
		public abstract long IncomingPacketsDiscarded { get; }
		public abstract long IncomingPacketsWithErrors { get; }
		public abstract long IncomingUnknownProtocolPackets { get; }
		public abstract long NonUnicastPacketsReceived { get; }
		public abstract long NonUnicastPacketsSent { get; }
		public abstract long OutgoingPacketsDiscarded { get; }
		public abstract long OutgoingPacketsWithErrors { get; }

		[MonoTODO("Not implemented for Linux")]
		public abstract long OutputQueueLength { get; }
		public abstract long UnicastPacketsReceived { get; }
		public abstract long UnicastPacketsSent { get; }
	}

	class Win32IPv4InterfaceStatistics : IPv4InterfaceStatistics
	{
		Win32_MIB_IFROW info;

		public Win32IPv4InterfaceStatistics (Win32_MIB_IFROW info)
		{
			this.info = info;
		}

		public override long BytesReceived {
			get { return info.InOctets; }
		}

		public override long BytesSent {
			get { return info.OutOctets; }
		}

		public override long IncomingPacketsDiscarded {
			get { return info.InDiscards; }
		}

		public override long IncomingPacketsWithErrors {
			get { return info.InErrors; }
		}

		public override long IncomingUnknownProtocolPackets {
			get { return info.InUnknownProtos; }
		}

		public override long NonUnicastPacketsReceived {
			get { return info.InNUcastPkts; }
		}

		public override long NonUnicastPacketsSent {
			get { return info.OutNUcastPkts; }
		}

		public override long OutgoingPacketsDiscarded {
			get { return info.OutDiscards; }
		}

		public override long OutgoingPacketsWithErrors {
			get { return info.OutErrors; }
		}

		public override long OutputQueueLength {
			get { return info.OutQLen; }
		}

		public override long UnicastPacketsReceived {
			get { return info.InUcastPkts; }
		}

		public override long UnicastPacketsSent {
			get { return info.OutUcastPkts; }
		}
	
	}

	class LinuxIPv4InterfaceStatistics : IPv4InterfaceStatistics
	{
		LinuxNetworkInterface linux;
		
		public LinuxIPv4InterfaceStatistics (LinuxNetworkInterface parent)
		{
			linux = parent;
		}

		long Read (string file)
		{
			try {
				return long.Parse (NetworkInterface.ReadLine (linux.IfacePath + file));
			} catch {
				return 0;
			}
		}
		
		public override long BytesReceived {
			get {
				return Read ("statistics/rx_bytes");
			}
		}

		public override long BytesSent {
			get {
				return Read ("statistics/tx_bytes");
			}
		}

		public override long IncomingPacketsDiscarded {
			get {
				return Read ("statistics/rx_dropped");
			}
		}

		public override long IncomingPacketsWithErrors {
			get {
				return Read ("statistics/rx_errors");
			}
		}

		public override long IncomingUnknownProtocolPackets {
			get {
				// TODO
				return 0;
			}
		}

		public override long NonUnicastPacketsReceived {
			get {
				// We cant distinguish these
				return Read ("statistics/multicast");
			}
		}

		public override long NonUnicastPacketsSent {
			get {
				// We cant distinguish these
				return Read ("statistics/multicast");
			}
		}

		public override long OutgoingPacketsDiscarded {
			get {
				return Read ("statistics/tx_dropped");
			}
		}

		public override long OutgoingPacketsWithErrors {
			get {
				return Read ("statistics/tx_errors");
			}
		}

		public override long OutputQueueLength {
			get {
				return 1024;
			}
		}

		public override long UnicastPacketsReceived {
			get {
				return Read ("statistics/rx_packets");
			}
		}

		public override long UnicastPacketsSent {
			get {
				return Read ("statistics/tx_packets");
			}
		}
	}

	// dummy class
	class MacOsIPv4InterfaceStatistics : IPv4InterfaceStatistics
	{
		//MacOsNetworkInterface macos;
		
		public MacOsIPv4InterfaceStatistics (MacOsNetworkInterface parent)
		{
			//macos = parent;
		}

		public override long BytesReceived {
			get { return 0; }
		}

		public override long BytesSent {
			get { return 0; }
		}

		public override long IncomingPacketsDiscarded {
			get { return 0; }
		}

		public override long IncomingPacketsWithErrors {
			get { return 0; }
		}

		public override long IncomingUnknownProtocolPackets {
			get { return 0; }
		}

		public override long NonUnicastPacketsReceived {
			get { return 0; }
		}

		public override long NonUnicastPacketsSent {
			get { return 0; }
		}

		public override long OutgoingPacketsDiscarded {
			get { return 0; }
		}

		public override long OutgoingPacketsWithErrors {
			get { return 0; }
		}

		public override long OutputQueueLength {
			get { return 0; }
		}

		public override long UnicastPacketsReceived {
			get { return 0; }
		}

		public override long UnicastPacketsSent {
			get { return 0; }
		}
	}
	
}