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ipv6: add the IPV6_FL_F_REFLECT flag to IPV6_FL_A_GET

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With this option, the socket will reply with the flow label value read
on received packets.

The goal is to have a connection with the same flow label in both
direction of the communication.

Changelog of V4:
 * Do not erase the flow label on the listening socket. Use pktopts to
 store the received value

Signed-off-by: Florent Fourcot <florent.fourcot@enst-bretagne.fr>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florent Fourcot 2014-01-17 17:15:03 +01:00 • committed by David S. Miller
parent 3acfa1e73c
commit df3687ffc6
4 changed files with 34 additions and 1 deletions
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1
include/uapi/linux/in6.h
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@ -85,6 +85,7 @@ struct in6_flowlabel_req {
#define IPV6_FL_F_CREATE 1
#define IPV6_FL_F_EXCL 2
#define IPV6_FL_F_REFLECT 4
#define IPV6_FL_S_NONE 0
#define IPV6_FL_S_EXCL 1