Timestamps for TCP packets?

[Grant Edwards]

On 2009-10-02, Thomas Johnson <thomas.j.johnson at gmail.com> wrote:

> Is there any way to get kernel-level timestamps for TCP packets while
> still using the standard python sockets library for communication?

libpcap

http://sourceforge.net/projects/pylibpcap/

> I need to communicate over a TCP connection as easily as
> possible, but also record the timestamps of the incoming and
> outgoing timestamps at microsecond or nanosecond resolution.

That shouldn't be a problem, except for the communication API
and the capture-packets-with-timestamp API are separate.
Remember that there's no guarantee that send() recv() calls
correspond in any way to the actual packets sent/recevied.

> The sockets library is of course great for the communication,
> and I've seen some python libraries that do packet sniffing
> and record timestamps, but it's not clear that I can do both
> at the same time.

Yes, you can do both at the same time.  But you have to use
separate APIs.

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