SMBLibrary/SMBServer/NetworkInterfaceHelper.cs

/* Copyright (C) 2014-2017 Tal Aloni <tal.aloni.il@gmail.com>. All rights reserved.
 * 
 * You can redistribute this program and/or modify it under the terms of
 * the GNU Lesser Public License as published by the Free Software Foundation,
 * either version 3 of the License, or (at your option) any later version.
 */
using System;
using System.Collections.Generic;
using System.Net;
using System.Net.Sockets;
using System.Net.NetworkInformation;
using Utilities;

namespace SMBServer
{
    public class NetworkInterfaceHelper
    {
        public static List<IPAddress> GetHostIPAddresses()
        {
            List<IPAddress> result = new List<IPAddress>();
            foreach (NetworkInterface netInterface in NetworkInterface.GetAllNetworkInterfaces())
            {
                IPInterfaceProperties ipProperties = netInterface.GetIPProperties();
                foreach (UnicastIPAddressInformation addressInfo in ipProperties.UnicastAddresses)
                {
                    if (addressInfo.Address.AddressFamily == AddressFamily.InterNetwork)
                    {
                        result.Add(addressInfo.Address);
                    }
                }
            }
            return result;
        }

        public static IPAddress GetSubnetMask(IPAddress ipAddress)
        {
            foreach (NetworkInterface netInterface in NetworkInterface.GetAllNetworkInterfaces())
            {
                IPInterfaceProperties ipProperties = netInterface.GetIPProperties();
                foreach (UnicastIPAddressInformation addressInfo in ipProperties.UnicastAddresses)
                {
                    if (addressInfo.Address.AddressFamily == AddressFamily.InterNetwork)
                    {
                        if (IPAddress.Equals(addressInfo.Address, ipAddress))
                        {
                            return addressInfo.IPv4Mask;
                        }
                    }
                }
            }
            return null;
        }
    }
}