summaryrefslogtreecommitdiff
path: root/include/net/xfrm.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/net/xfrm.h')
-rw-r--r--include/net/xfrm.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index b203e14d26b7..4de7ed9016d9 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -827,6 +827,14 @@ static inline bool addr_match(const void *token1, const void *token2,
return true;
}
+static inline bool addr4_match(__be32 a1, __be32 a2, u8 prefixlen)
+{
+ /* C99 6.5.7 (3): u32 << 32 is undefined behaviour */
+ if (prefixlen == 0)
+ return true;
+ return !((a1 ^ a2) & htonl(0xFFFFFFFFu << (32 - prefixlen)));
+}
+
static __inline__
__be16 xfrm_flowi_sport(const struct flowi *fl, const union flowi_uli *uli)
{