diff options
Diffstat (limited to 'inany.h')
| -rw-r--r-- | inany.h | 17 |
1 files changed, 16 insertions, 1 deletions
@@ -14,8 +14,9 @@ * @v4mapped.zero: All zero-bits for an IPv4 address * @v4mapped.one: All one-bits for an IPv4 address * @v4mapped.a4: If @a6 is an IPv4 mapped address, the IPv4 address + * @u64: As an array of u64s (solely for hashing) * - * @v4mapped shouldn't be accessed except via helpers. + * @v4mapped and @u64 shouldn't be accessed except via helpers. */ union inany_addr { struct in6_addr a6; @@ -24,7 +25,10 @@ union inany_addr { uint8_t one[2]; struct in_addr a4; } v4mapped; + uint32_t u32[4]; }; +static_assert(sizeof(union inany_addr) == sizeof(struct in6_addr)); +static_assert(_Alignof(union inany_addr) == _Alignof(uint32_t)); /** inany_v4 - Extract IPv4 address, if present, from IPv[46] address * @addr: IPv4 or IPv6 address @@ -94,4 +98,15 @@ static inline void inany_from_sockaddr(union inany_addr *aa, in_port_t *port, } } +/** inany_siphash_feed- Fold IPv[46] address into an in-progress siphash + * @state: siphash state + * @aa: inany to hash + */ +static inline void inany_siphash_feed(struct siphash_state *state, + const union inany_addr *aa) +{ + siphash_feed(state, (uint64_t)aa->u32[0] << 32 | aa->u32[1]); + siphash_feed(state, (uint64_t)aa->u32[2] << 32 | aa->u32[3]); +} + #endif /* INANY_H */ |