+static inline bool ipv6_addr_is_set(const struct in6_addr *addr) {
+ return !ipv6_addr_equals(addr, &in6addr_any);
+}
+
+static inline bool ipv6_addr_is_multicast(const struct in6_addr *ip) {
+ return ip->s6_addr[0] == 0xff;
+}
+
+static inline struct in6_addr
+in6_addr_mapped_ipv4(ovs_be32 ip4)
+{
+ struct in6_addr ip6 = { .s6_addr = { [10] = 0xff, [11] = 0xff } };
+ memcpy(&ip6.s6_addr[12], &ip4, 4);
+ return ip6;
+}
+
+static inline void
+in6_addr_set_mapped_ipv4(struct in6_addr *ip6, ovs_be32 ip4)
+{
+ *ip6 = in6_addr_mapped_ipv4(ip4);
+}
+
+static inline ovs_be32
+in6_addr_get_mapped_ipv4(const struct in6_addr *addr)
+{
+ union ovs_16aligned_in6_addr *taddr = (void *) addr;
+ if (IN6_IS_ADDR_V4MAPPED(addr)) {
+ return get_16aligned_be32(&taddr->be32[3]);
+ } else {
+ return INADDR_ANY;
+ }
+}
+
+static inline void
+in6_addr_solicited_node(struct in6_addr *addr, const struct in6_addr *ip6)
+{
+ union ovs_16aligned_in6_addr *taddr = (void *) addr;
+ memset(taddr->be16, 0, sizeof(taddr->be16));
+ taddr->be16[0] = htons(0xff02);
+ taddr->be16[5] = htons(0x1);
+ taddr->be16[6] = htons(0xff00);
+ memcpy(&addr->s6_addr[13], &ip6->s6_addr[13], 3);
+}
+
+static inline void
+ipv6_multicast_to_ethernet(struct eth_addr *eth, const struct in6_addr *ip6)
+{
+ eth->ea[0] = 0x33;
+ eth->ea[1] = 0x33;
+ eth->ea[2] = ip6->s6_addr[12];
+ eth->ea[3] = ip6->s6_addr[13];
+ eth->ea[4] = ip6->s6_addr[14];
+ eth->ea[5] = ip6->s6_addr[15];
+}
+