Package net.i2p.router.time

Class NtpClient

java.lang.Object
net.i2p.router.time.NtpClient
public class NtpClient
extends Object
NtpClient - an NTP client for Java. This program connects to an NTP server and prints the response to the console. The local clock offset calculation is implemented according to the SNTP algorithm specified in RFC 2030. Note that on windows platforms, the curent time-of-day timestamp is limited to an resolution of 10ms and adversely affects the accuracy of the results. Public only for main(), not a public API, not for external use. 2036-compliant as of 0.9.50, see NtpMessage.
Since:
0.9.1 moved from net.i2p.time
Author:
Adam Buckley (minor refactoring by jrandom)

  • Field Summary

    Fields 
    Modifier and Type Field Description
    (package private) static double SECONDS_1900_TO_EPOCH
    difference between the unix epoch and jan 1 1900 (NTP uses that)

  • Constructor Summary

    Constructors 
    Constructor Description
    NtpClient()  

  • Method Summary

    Modifier and Type Method Description
    (package private) static long[] currentTimeAndStratum​(String[] serverNames, int perServerTimeout, boolean preferIPv6, Log log)
    Query the ntp servers, returning the current time from first one we find Hack to return time and stratum
    static void main​(String[] args)
    Usage: NtpClient [-6] [servers...] default pool.ntp.org

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Field Details

  • Constructor Details

  • Method Details

    • currentTimeAndStratum

      static long[] currentTimeAndStratum​(String[] serverNames, int perServerTimeout, boolean preferIPv6, Log log)
      Query the ntp servers, returning the current time from first one we find Hack to return time and stratum
      Parameters:
      log - may be null
      Returns:
      time in rv[0] and stratum in rv[1]
      Throws:
      IllegalArgumentException - if none of the servers are reachable
      Since:
      0.7.12

    • main

      public static void main​(String[] args) throws IOException
      Usage: NtpClient [-6] [servers...] default pool.ntp.org
      Throws:
      IOException