Merge pull request #13649 from donaldsharp/unlock_the_node_or_else

[mirror_frr.git] / lib / prefix.h

diff --git a/lib/prefix.h b/lib/prefix.h
index 88a228b55c3a9bbec76e943e75d0eb5a4e324852..90b792b33c61905ef7c1ebf4a8c9b70421a4caff 100644 (file)
--- 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);