// Copyright (C) 2013 Lex Li
// 
// 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.

/*
 * Created by SharpDevelop.
 * User: Lex
 * Date: 3/3/2013
 * Time: 10:27 AM
 * 
 * To change this template use Tools | Options | Coding | Edit Standard Headers.
 */

using System.Net.NetworkInformation;
using System;
using GSF.Net.Snmp.Pipeline;

namespace GSF.Net.Snmp.Objects
{
    /// <summary>
    /// ifMtu object.
    /// </summary>
    internal sealed class IfMtu : ScalarObject
    {
        private readonly ISnmpData _data;

        /// <summary>
        /// Initializes a new instance of the <see cref="IfMtu"/> class.
        /// </summary>
        /// <param name="index">The index.</param>
        /// <param name="networkInterface">The network interface.</param>
        public IfMtu(int index, NetworkInterface networkInterface)
            : base("1.3.6.1.2.1.2.2.1.4.{0}", index)
        {
            if (networkInterface.Supports(NetworkInterfaceComponent.IPv4))
            {
                IPv4InterfaceProperties pv4InterfaceProperties = networkInterface.GetIPProperties().GetIPv4Properties();
                _data = new Integer32(pv4InterfaceProperties == null ? -1 : pv4InterfaceProperties.Mtu);
            }
            else
            {
                try
                {
                    _data = new Integer32(networkInterface.GetIPProperties().GetIPv6Properties().Mtu);
                }
				catch (NotImplementedException)
				{
					_data = new Integer32(0);
				}
            }
        }

        /// <summary>
        /// Gets or sets the data.
        /// </summary>
        /// <value>
        /// The data.
        /// </value>
        /// <exception cref="AccessFailureException"></exception>
        public override ISnmpData Data
        {
            get { return _data; }
            set { throw new AccessFailureException(); }
        }
    }
}