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17 May 2024, 09:02:56 UTC
Revision bc26ccd8fc756749de95606d28314efd0ce5aec3 authored by Andrey Vagin on 19 September 2012, 09:40:00 UTC, committed by David S. Miller on 20 September 2012, 21:49:58 UTC 
tcp: restore rcv_wscale in a repair mode (v2)
 
rcv_wscale is a symetric parameter with snd_wscale.

Both this parameters are set on a connection handshake.

Without this value a remote window size can not be interpreted correctly,
because a value from a packet should be shifted on rcv_wscale.

And one more thing is that wscale_ok should be set too.

This patch doesn't break a backward compatibility.
If someone uses it in a old scheme, a rcv window
will be restored with the same bug (rcv_wscale = 0).

v2: Save backward compatibility on big-endian system. Before
    the first two bytes were snd_wscale and the second two bytes were
    rcv_wscale. Now snd_wscale is opt_val & 0xFFFF and rcv_wscale >> 16.
    This approach is independent on byte ordering.

Cc: David S. Miller <davem@davemloft.net>
Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Cc: James Morris <jmorris@namei.org>
Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Cc: Patrick McHardy <kaber@trash.net>
CC: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Andrew Vagin <avagin@openvz.org>
Acked-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent 8ea853f
History
Tip revision: bc26ccd8fc756749de95606d28314efd0ce5aec3 authored by Andrey Vagin on 19 September 2012, 09:40:00 UTC
tcp: restore rcv_wscale in a repair mode (v2)
Tip revision: bc26ccd
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