Wireshark mailing list archives

Re: Can't get nsecs info form lua srcript ?


From: 徐鸿 <icehong () gmail com>
Date: Fri, 21 Nov 2014 21:23:05 +0800

Thanks for the reply !
I got accurate result from string.format("%f",b)),   and got that precision
of floating point number.   Many thanks !

2014-11-21 6:55 GMT+08:00 Guy Harris <guy () alum mit edu>:


On Nov 20, 2014, at 2:43 PM, John Sullivan <jsethdev () kanargh force9 co uk>
wrote:

The second part of the answer involves the meaning of a nanosecond
precision packet timestamp.

Especially given that there isn't necessarily a guarantee that the time
stamps reflect the exact arrival time of the first bit - or the last bit -
of the packet at the receiver's network adapter, or that it reflects
*anything* other than the time when the hardware, software, or firmware
that timestamps the packet first sees the packet (which could be at some
point in the host networking stack).
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