On Dec 2, 2013, at 5:50 AM, Anders Broman <anders.bro...@ericsson.com> wrote:

> So it seems libpcap is reporting the availability of HW timestamp when in 
> fact it's not available.

Somewhere between Linux 3.0 and Linux 3.6, the ethtool ioctl 
ETHTOOL_GET_TS_INFO was introduced; it allows userland to query the kernel 
about a particular device to find out what time stamp types it supports.

libpcap does not use that yet.

I have some code to do so, but have not yet had the opportunity to test it.

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