diff options
Diffstat (limited to 'include/net/xfrm.h')
| -rw-r--r-- | include/net/xfrm.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/net/xfrm.h b/include/net/xfrm.h index b203e14d26b..4de7ed9016d 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) { |