44 lines
1.5 KiB
C#
44 lines
1.5 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Net;
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using System.Net.NetworkInformation;
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namespace DnsClient
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{
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public class NameServer
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{
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/// <summary>
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/// The default DNS server port.
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/// </summary>
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public const int DefaultPort = 53;
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/// <summary>
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/// Gets a list of name servers by iterating over the available network interfaces.
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/// </summary>
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/// <returns>The list of name servers.</returns>
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public static ICollection<IPEndPoint> ResolveNameServers()
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{
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var result = new HashSet<IPEndPoint>();
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var adapters = NetworkInterface.GetAllNetworkInterfaces();
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foreach (NetworkInterface networkInterface in
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adapters
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.Where(p => p.OperationalStatus == OperationalStatus.Up
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&& p.NetworkInterfaceType != NetworkInterfaceType.Loopback))
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{
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foreach (IPAddress dnsAddress in networkInterface
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.GetIPProperties()
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.DnsAddresses
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.Where(i =>
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i.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork
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|| i.AddressFamily == System.Net.Sockets.AddressFamily.InterNetworkV6))
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{
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result.Add(new IPEndPoint(dnsAddress, DefaultPort));
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}
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}
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return result.ToArray();
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}
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}
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}
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