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SubjectTCP retransmission in 2.2.5
Hi,

What I would like to know is, if there is a way to see whether a skbuff
in tcp_transmit_skb() comes from a
retransmission or not? I´m using kernel 2.2.5.
If I know the

skb->sk->tp_pinfo.af_tcp.retrans_out

value from the very previous tcp_transmit_skb() invocation and the
current one, is it safe to say that if they differ I have a
retransmission?
Is there any easier way to check for retransmissions?

Any thoughts are appreciated.

Thanks,
Thorsten



P.S.: I´m doing a project about differentiated services (especially the
premium service) on the host side. Would like to exchange some ideas
with anyone involved in the same.



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