C#写的控制台NTP服务端以及winform的NTP客户端源码

公司有几台设备需要用NTP同步后验证时差是否在15ms以内，遂编一小工具实现此需求，代码很简单，适合新手以及对NTP不太了解的盆友观摩。

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 NTPServer;
using System.Net.Sockets;
using System.Net;

namespace NTPClient
{
    public partial class Form1 : Form
    {

        const int LocalPort = 12345;
        int remoteport = 1234;
        static UdpClient _udpclient;
        static NTPOperation _ntpOp = new NTPOperation（）;
        
        void send（）
        {
           
            

        }

        public Form1（）
        {
            InitializeComponent（）;
             _udpclient = new UdpClient（LocalPort AddressFamily.InterNetwork）;
             _udpclient.Client.ReceiveTimeout = 5000;
        }

        private void Btn_Sync_Click（object sender EventArgs e）
        {
            NTPPackage temppkg = new NTPPackage（）;
            _ntpOp.setPackge（temppkg）;
            long OriginateTimestamp = 0;
            long ReceiveTimestamp = 0;
            Console.WriteLine（“OriginateTimestamp:{0}“ OriginateTimestamp）;
            _ntpOp.setMode（3）;
            _ntpOp.setVN（3）;
            _ntpOp.setLI（0）;
            _ntpOp._ntp.Stratum = 1;
            _ntpOp._ntp.Poll = 0x0a;
            _ntpOp._ntp.Precision = 0xe9;
            _ntpOp._ntp.rootdelay = 0;
            _ntpOp._ntp.RootDispersion = 0;
            _ntpOp._ntp.ReferenceIdentifier = BitConverter.ToUInt32（new byte[4] { 0x41 0x43 0x54 0x53 } 0）;
            _ntpOp._ntp.ReferenceTimestamp = DateTime.Now.ToFileTimeUtc（）;
            _ntpOp._ntp.OriginateTimestamp = OriginateTimestamp;
            _ntpOp._ntp.ReceiveTimestamp = ReceiveTimestamp;
            _ntpOp._ntp.TransmitTimestamp = DateTime.Now.ToFileTimeUtc（）;
            byte[] sndpkg = _ntpOp.getBytes（）;
            IPAddress ipaddr = null;
            if （!IPAddress.TryParse（TB_IP.Text out ipaddr））
            {
                var szaddr = Dns.GetHostAddresses（TB_IP.Text）;
                if （szaddr.Length > 0）
                {
                    ipaddr = szaddr[0];
                }
                else
                {
                    MessageBox.Show（“无效域名或IP地址“）;
                    return;
                }
            }
            remoteport = Convert.ToInt32（TB_RemotePort.Text）;
            IPEndPoint remoteip = new IPEndPoint（ipaddr remoteport）;
            UdpState state = new UdpState（_udpclient remoteip）;
            _udpclient.Send（sndpkg sndpkg.Length remoteip）;
            byte[] recv = null;
            try
            {
                recv = _udpclient.Receive（ref remoteip）;
            }
            catch（Exception ex）
            {
                MessageBox.Show（“访问失败，请确保IP地址和端口正确“）;
                return;
            }
            if（recv.Length >= 60）
            {
                long t4 = DateTime.Now.ToFileTimeUtc（）;
                NTPPackage pkg =

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

     文件      17920  2017-07-24 09:26  NTPClient\NTPClient\bin\Debug\NTPClient.exe

     文件      48640  2017-07-24 09:26  NTPClient\NTPClient\bin\Debug\NTPClient.pdb

     文件      11600  2017-07-24 09:28  NTPClient\NTPClient\bin\Debug\NTPClient.vshost.exe

     文件        490  2017-03-19 05:00  NTPClient\NTPClient\bin\Debug\NTPClient.vshost.exe.manifest

     文件       5201  2017-07-21 16:13  NTPClient\NTPClient\Form1.cs

     文件      12732  2017-07-21 16:03  NTPClient\NTPClient\Form1.Designer.cs

     文件       5817  2017-07-21 16:03  NTPClient\NTPClient\Form1.resx

     文件       3842  2017-07-21 15:32  NTPClient\NTPClient\NTPClient.csproj

     文件       2962  2017-07-24 09:25  NTPClient\NTPClient\NTPOperation.cs

     文件        815  2017-07-24 09:25  NTPClient\NTPClient\NTPPackage.cs

     文件       5420  2017-07-24 08:25  NTPClient\NTPClient\obj\x86\Debug\DesignTimeResolveAssemblyReferences.cache

     文件       6377  2017-07-24 09:26  NTPClient\NTPClient\obj\x86\Debug\DesignTimeResolveAssemblyReferencesInput.cache

     文件       1597  2017-07-24 09:28  NTPClient\NTPClient\obj\x86\Debug\NTPClient.csproj.FileListAbsolute.txt

     文件        975  2017-07-21 16:03  NTPClient\NTPClient\obj\x86\Debug\NTPClient.csproj.GenerateResource.Cache

     文件       9174  2017-07-24 08:26  NTPClient\NTPClient\obj\x86\Debug\NTPClient.csprojResolveAssemblyReference.cache

     文件      17920  2017-07-24 09:26  NTPClient\NTPClient\obj\x86\Debug\NTPClient.exe

     文件        180  2017-07-21 16:03  NTPClient\NTPClient\obj\x86\Debug\NTPClient.Form1.resources

     文件      48640  2017-07-24 09:26  NTPClient\NTPClient\obj\x86\Debug\NTPClient.pdb

     文件        180  2017-07-21 15:32  NTPClient\NTPClient\obj\x86\Debug\NTPClient.Properties.Resources.resources

     文件       2042  2017-07-24 08:26  NTPClient\NTPClient\Program.cs

     文件       1350  2017-07-21 11:47  NTPClient\NTPClient\Properties\AssemblyInfo.cs

     文件       2870  2017-07-21 11:47  NTPClient\NTPClient\Properties\Resources.Designer.cs

     文件       5612  2017-07-21 11:47  NTPClient\NTPClient\Properties\Resources.resx

     文件       1096  2017-07-21 11:47  NTPClient\NTPClient\Properties\Settings.Designer.cs

     文件        249  2017-07-21 11:47  NTPClient\NTPClient\Properties\Settings.settings

     文件       1620  2017-07-21 15:39  NTPClient\NTPClient\SysDateTime.cs

     文件        626  2017-07-21 11:16  NTPClient\NTPClient\UdpState.cs

     文件        869  2017-07-21 11:47  NTPClient\NTPClient.sln

    ..A..H.     25600  2017-07-24 08:01  NTPClient\NTPClient.suo

     文件       8704  2017-07-24 08:09  NTPServer\NTPServer\bin\Debug\NTPServer.exe

............此处省略37个文件信息