Re: Problems with ns Timestamps

[Guy Harris <guy () alum mit edu>]

On Jul 28, 2016, at 7:12 AM, Christian <christian.rupp.stuttgart () freenet de> wrote:

> I have encountered a problem.
>
> I am capturing Packages with hardware timestamps and nanosecond precision...but the timestamps are bugged.
>
> sadly I'm not at the place where I captured the data, so the used used command might be slightly different, as I have 
> to work from my memory:
> tcpdump -i eth4 port 33330 -v -tt -j adapter_unsynced --time-stamp-precision=nano > dumpfile
>
> The problem is, that if the time is at below 100ms, the 0.1  field is not 0 as it should be, but doesn't exist.

So by "the 0.1 field" you mean "the tenths digit", so that, for example, a time stamp of 1.05 seconds would appear as 
1.5?

And are you saying that libpcap is providing bad time stamps, with an incorrect nanoseconds field, or are you saying 
that tcpdump is incorrectly printing a good time stamp?
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