Wireshark mailing list archives
Re: Can't get nsecs info form lua srcript ?
From: Guy Harris <guy () alum mit edu>
Date: Thu, 20 Nov 2014 11:49:11 -0800
On Nov 20, 2014, at 8:07 AM, 徐鸿 <icehong () gmail com> wrote:
Is it possible to get accurate nanosecond info for lua script ? For the same packet , I got pinfo.abs_ts == 1416493696.7953 in lua script , but in main window the time show as "1416493696.795345000", is it possible to got the accurate nanosecond in lua ?
1416493696.795345000 is either, by happenstance, an exact multiple of 1000 nanoseconds, i.e. 1 microsecond, or has only microsecond precision. Most time stamping in the capture mechanisms used by Wireshark has microsecond precision, not nanosecond precision. The Wireshark code in
my wireshark version is Version 1.12.2 (v1.12.2-0-g898fa22 from master-1.12) Running on 64-bit Windows 7 Service Pack 1, build 7601
1.12.2 that gets the time appears to do a floating-point calculation that *should* provide the full resolution. If the Lua in the Windows version is built with lua_Number being a double, which I think is the default, that *should* be sufficient to hold a value of 1416493696.795345 with full precision. How are you displaying the value in your Lua script? Perhaps it's getting the time stamp with full precision but, for some reason, it's not displaying it with full precision? ___________________________________________________________________________ Sent via: Wireshark-dev mailing list <wireshark-dev () wireshark org> Archives: http://www.wireshark.org/lists/wireshark-dev Unsubscribe: https://wireshark.org/mailman/options/wireshark-dev mailto:wireshark-dev-request () wireshark org?subject=unsubscribe
Current thread:
- Can't get nsecs info form lua srcript ? 徐鸿 (Nov 20)
- Re: Can't get nsecs info form lua srcript ? Anders Broman (Nov 20)
- Re: Can't get nsecs info form lua srcript ? Guy Harris (Nov 20)
- Re: Can't get nsecs info form lua srcript ? John Sullivan (Nov 20)
- Re: Can't get nsecs info form lua srcript ? Guy Harris (Nov 20)
- Re: Can't get nsecs info form lua srcript ? 徐鸿 (Nov 21)
- Re: Can't get nsecs info form lua srcript ? Guy Harris (Nov 20)