diff options
Diffstat (limited to 'lib/ipv4.h')
| -rw-r--r-- | lib/ipv4.h | 9 |
1 files changed, 9 insertions, 0 deletions
@@ -52,6 +52,7 @@ typedef u32 ip_addr; #define ipa_mkmask(x) _MI(u32_mkmask(x)) #define ipa_mklen(x) u32_masklen(_I(x)) #define ipa_hash(x) ipv4_hash(_I(x)) +#define ipa_hash32(x) ipv4_hash32(_I(x)) #define ipa_hton(x) x = _MI(htonl(_I(x))) #define ipa_ntoh(x) x = _MI(ntohl(_I(x))) #define ipa_classify(x) ipv4_classify(_I(x)) @@ -86,6 +87,14 @@ static inline unsigned ipv4_hash(u32 a) return a & 0xffff; } +static inline u32 ipv4_hash32(u32 a) +{ + /* Returns a 32-bit value, although low-order bits are not mixed */ + a ^= a << 16; + a ^= a << 12; + return a; +} + static inline int ipv4_compare(u32 x, u32 y) { return (x > y) - (x < y); |