how to make the sniffer quicker?

["David Lopez" <David.Lopez () cit ie>]

Hi

 

I'm developing a position system for my PhD.

This system is based on Round Trip Time measurements.

I'm getting the timestamp of the packets using Tethereal and the Mactime
in the Prism Monitor Header

 

My problem is: the sniffer is too slow.

When I'm flooding the receiver with pings, using the linux command ping
-f, if I send X in one second I cannot get this number of packets in the
sniffer, I always get less, around the 10%. 

It is like the sender is quicker generating than the sniffer capturing
them.

How can I improve the number of capture packets per second in the
sniffer?

 

The sequence that I'm sending and trying to capture is a ping sequence
using Request to send/Clear to send, so the whole sequence is:

-Request to send

-Clear to send

-Request (ping)

-Acknowledge

-Reply (ping)

-Acknowledge 

 

I'm only interested in the RTS and CTS timestamps, can I filter out the
Request, Reply and Ack packets using tcpdump filters in Tethereal? Maybe
in this way Ill be quicker

 

All the best

 

David

 

 

 

 

 

-
This is the tcpdump-workers list.
Visit https://cod.sandelman.ca/ to unsubscribe.