david lopez wrote:
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
see http://wiki.wireshark.org/Performance
Regards, ULFL