我们的SNTP服务器没有响应我的请求 [英] Our SNTP server is not responding for my requests
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问题描述
大家好,
我写了一个SNTP客户端代码来检索时间信息,如下所示。在这里,代码停在第_sntpMessageRequest.SNTPData = _udpClient.Receive(ref _ipEndpoint);因为SNTP服务器没有响应。
Hi all,
I have written a SNTP Client code to retrieve time information as below. In this, the code stops at line _sntpMessageRequest.SNTPData = _udpClient.Receive(ref _ipEndpoint); as SNTP Server is not responding.
public bool QueryTimeSynchronizationServer()
{
UdpClient _udpClient = null;
IPEndPoint _ipEndpoint = null;
string _ipString = null;
IPAddress _ipAddress = null;
int _portNumber = 123;
try
{
_ipString = "ip address";
IPAddress.TryParse(_ipString, out _ipAddress);
_ipEndpoint = new IPEndPoint(_ipAddress, _portNumber);
//SNTPMessageRequest-> a object holds the Byte array for SNTP request and do other supporting functions
SNTPMessageRequest _sntpMessageRequest = FrameSNTPMessageRequest();
using (_udpClient = new UdpClient(123))
{
_udpClient.Client.SendTimeout = 5000;
_udpClient.Client.ReceiveTimeout = 5000;
_udpClient.Connect(_ipEndpoint);
_udpClient.Send(_sntpMessageRequest.SNTPData, _sntpMessageRequest.SNTPData.Length);
//Code stops at below line as SNTP Server is not responding.
_sntpMessageRequest.SNTPData = _udpClient.Receive(ref _ipEndpoint);
_sntpMessageRequest.ReceptionTimestamp = DateTime.Now;
string _serverTime = _sntpMessageRequest.TransmitTimeStamp.ToString();
}
}
catch (Exception ex)
{
}
return true;
}
private SNTPMessageRequest FrameSNTPMessageRequest()
{
SNTPMessageRequest _sntpMessageRequest = new SNTPMessageRequest();
_sntpMessageRequest.VersionNumber = VersionNumber.Version3;
_sntpMessageRequest.Mode = Mode.Client;
for (int i = 1; i < 48; i++)
{
_sntpMessageRequest.SNTPData[i] = 0;
}
_sntpMessageRequest.TransmitTimeStamp = DateTime.Now.ToLocalTime();
return _sntpMessageRequest;
}
请帮助我解决我的错误。
先谢谢。
Ranjith。
我尝试了什么:
我试过发送SNTP请求所有四个版本(1-4),但服务器没有响应。
Kindly help me with where i am doing mistake.
Thanks in Advance.
Ranjith.
What I have tried:
I have tried sending SNTP request with all four versions(1-4), but the server is not responding.
推荐答案
这对我有用:日期 - 如何使用C#查询NTP服务器? - 堆栈溢出 [ ^ ]
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