[Guy Harris <guy@xxxxxxxxxxxx>]

Paul Jacobs wrote:
> I found the display filter for tcp retransmissions but is there a capture
> filter for this?

No - libpcap's capture filter mechanism doesn't support any form of 
state kept between packets; each packet is treated independently from 
previous packets, so it'd be impossible for the filter mechanism to know 
whether a packet is a retransmission.