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Convert NTP timestamp from NTP packet to System time and date format

+6 votes
1,268 views

I want to write NTP client which sends and receives NTP packet to NTP server and should read the value from one of the four offsets and convert it to user readable local or GMT time format, I specifically want to know which offsets should I read in order to get correct timestamp from the packet.

Any suggestions?

posted Jan 30, 2014 by Luv Kumar

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Any time you're looking at network protocols, the one obvious place to look is the RFCs. Just do a web search for 'rfc ntp' to find the relevant ones. In my case, the search results pulled up a couple of good-looking hits from ietf.org,  plus the Wikipedia article for NTP, with a section "Relevant RFCs", which would make good reading.
commented Jan 30, 2014 by Garima Jain
Maybe this lib is of interest to you:

https://pypi.python.org/pypi/ntplib/

It does all the NTP stuff for you. If you want to implement that stuff by yourself just take a look at the code of ntplib, it should explain what you want.
commented Jan 30, 2014 by Seema Siddique

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