DNS解析代码copy
临时备忘
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using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using ARSoft.Tools.Net.Dns; using System.Net; using System.Diagnostics; namespace UseT { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { Trace.TraceError("xxx"); var dnsServerIp = IPAddress.Parse("192.168.1.30"); DnsClient dsnClient = new DnsClient(dnsServerIp, 3000); Stopwatch sw = new Stopwatch(); sw.Start(); Console.WriteLine("--------响应----------"); var r = dsnClient.Resolve(textBox1.Text); if (r != null) { foreach (var it in r.AnswerRecords) { var ar = it as ARecord; if (ar != null) Console.WriteLine(ar.Address.ToString()); } } sw.Stop(); Console.WriteLine(sw.ElapsedMilliseconds); } private DnsServer Server { get; set; } private void button2_Click(object sender, EventArgs e) { DnsServer dnsServer = new DnsServer(10,10,ProcessQuery); Server = dnsServer; dnsServer.Start(); } private void button3_Click(object sender, EventArgs e) { if (Server != null) Server.Stop(); } private static Lazy<DnsClient> LazyClient = new Lazy<DnsClient>(()=>DnsClient.Default, true); private static DnsMessageBase ProcessQuery(DnsMessageBase message, IPAddress clientAddress, System.Net.Sockets.ProtocolType protocol) { message.IsQuery = false; DnsMessage query = message as DnsMessage; // 官方的样例文档中没有体现DNS请求发起者的IP,我在这里增加了。 Console.WriteLine("Client Address:{0}", clientAddress.ToString()); Console.WriteLine("query.Questions.Count:{0}", query.Questions.Count); Console.WriteLine("query.Questions.ToString():{0}", query.Questions.ToString()); Console.WriteLine("query.Questions[0].ToString():{0}", query.Questions[0].ToString()); Console.WriteLine("query.Questions[0].GetType():{0}", query.Questions[0].GetType().ToString()); Console.WriteLine("query.Questions[0].Name:{0}", query.Questions[0].Name.ToString()); Console.WriteLine("query.Questions[0].RecordType:{0}", query.Questions[0].RecordType.ToString()); Console.WriteLine("query.Questions[0].RecordClass {0}", query.Questions[0].RecordClass.ToString()); //加入自己的解析 if (query.Questions[0].Name.Contains("xxx")) { query.AnswerRecords.Add(new ARecord("", 3600, IPAddress.Parse("192.168.1.94"))); message.ReturnCode = ReturnCode.NoError; return message; } else { var r= LazyClient.Value.Resolve(query.Questions[0].Name); if (r != null) { foreach (var it in r.AnswerRecords) { var ar = it as ARecord; if (ar != null) { query.AnswerRecords.Add(ar); } } message.ReturnCode = ReturnCode.NoError; } return message; } } } }