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xfrm: use gre key as flow upper protocol info

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The GRE Key field is intended to be used for identifying an individual
traffic flow within a tunnel. It is useful to be able to have XFRM
policy selector matches to have different policies for different
GRE tunnels.

Signed-off-by: Timo Teräs <timo.teras@iki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Timo Teräs 2010-11-03 04:41:38 +00:00 • committed by David S. Miller
parent e1f2d8c2cc
commit cc9ff19da9
4 changed files with 30 additions and 5 deletions
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2
include/net/flow.h
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@ -67,6 +67,7 @@ struct flowi {
} dnports;
__be32 spi;
__be32 gre_key;
struct {
__u8 type;
@ -78,6 +79,7 @@ struct flowi {
#define fl_icmp_code uli_u.icmpt.code
#define fl_ipsec_spi uli_u.spi
#define fl_mh_type uli_u.mht.type
#define fl_gre_key uli_u.gre_key
__u32 secid; /* used by xfrm; see secid.txt */
} __attribute__((__aligned__(BITS_PER_LONG/8)));