diff options
Diffstat (limited to 'lib/prefix.h')
| -rw-r--r-- | lib/prefix.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/lib/prefix.h b/lib/prefix.h index 88a228b55c..90b792b33c 100644 --- a/lib/prefix.h +++ b/lib/prefix.h @@ -598,6 +598,14 @@ static inline bool ipv6_mcast_ssm(const struct in6_addr *addr) return (bits & 0xfff0ffff) == 0xff300000; } +static inline bool ipv6_mcast_reserved(const struct in6_addr *addr) +{ + uint32_t bits = ntohl(addr->s6_addr32[0]); + + /* ffx2::/16 */ + return (bits & 0xff0fffff) == 0xff020000; +} + static inline uint8_t ipv4_mcast_scope(const struct in_addr *addr) { uint32_t bits = ntohl(addr->s_addr); |