Package net.i2p.router.time
Class NtpClient
java.lang.Object
net.i2p.router.time.NtpClient
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)
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Field Summary
Modifier and TypeFieldDescription(package private) static final double
difference between the unix epoch and jan 1 1900 (NTP uses that) -
Constructor Summary
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Method Summary
Modifier and TypeMethodDescription(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 stratumstatic void
Usage: NtpClient [-6] [servers...] default pool.ntp.org
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Field Details
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SECONDS_1900_TO_EPOCH
static final double SECONDS_1900_TO_EPOCHdifference between the unix epoch and jan 1 1900 (NTP uses that)- See Also:
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Constructor Details
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NtpClient
public NtpClient()
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Method Details
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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
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main
Usage: NtpClient [-6] [servers...] default pool.ntp.org- Throws:
IOException
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