Andi Kleen writes:
> > BSD and Solaris both make these kinds of packets, therefore it is must
> > to handle them properly. So we will fix Linux, there is no argument.
>
> How do you propose to handle them? Queue the data anyways or just process
> the ACK?
tcp_sequence returns two flag bits instead of it's current binary
state. One bit says "accept data", the other says "accept control
bits" (such as RST, ACK, etc.)
tcp_sequence also will truncate the data len of the SKB area if
necessary, BSD really puts total crap in the probe byte.
Callers of tcp_sequence check the return value bits accordingly.
This is all slow path code, so there are no performance issues.
Later,
David S. Miller
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