From: Florian Westphal <f...@strlen.de>
Date: Thu, 30 Aug 2018 14:24:29 +0200
> RFC 1337 says:
> ''Ignore RST segments in TIME-WAIT state.
> If the 2 minute MSL is enforced, this fix avoids all three hazards.''
>
> So with net.ipv4.tcp_rfc1337=1, expected behaviour is to have TIME-WAIT sk
> expire rather than removing it instantly when a reset is received.
>
> However, Linux will also re-start the TIME-WAIT timer.
>
> This causes connect to fail when tying to re-use ports or very long
> delays (until syn retry interval exceeds MSL).
...
> Without this patch, 'ss' shows restarts of tw timer and last packet is
> thus just another pure ack, more than one minute later.
>
> This restores the original code from commit 283fd6cf0be690a83
> ("Merge in ANK networking jumbo patch") in netdev-vger-cvs.git .
>
> For some reason the else branch was removed/lost in 1f28b683339f7
> ("Merge in TCP/UDP optimizations and [..]") and timer restart became
> unconditional.
>
> Reported-by: Michal Tesar <mte...@redhat.com>
> Signed-off-by: Florian Westphal <f...@strlen.de>
Applied and thanks for the packet drill test case :-)
