+extern const struct in6_addr in6addr_exact;
+#define IN6ADDR_EXACT_INIT { { { 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, \
+ 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff } } }
+
+static inline bool ipv6_addr_equals(const struct in6_addr *a,
+ const struct in6_addr *b)
+{
+#ifdef IN6_ARE_ADDR_EQUAL
+ return IN6_ARE_ADDR_EQUAL(a, b);
+#else
+ return !memcmp(a, b, sizeof(*a));
+#endif
+}
+
+static inline bool ipv6_mask_is_any(const struct in6_addr *mask) {
+ return ipv6_addr_equals(mask, &in6addr_any);
+}
+
+static inline bool ipv6_mask_is_exact(const struct in6_addr *mask) {
+ return ipv6_addr_equals(mask, &in6addr_exact);
+}
+
+void format_ipv6_addr(char *addr_str, const struct in6_addr *addr);
+void print_ipv6_addr(struct ds *string, const struct in6_addr *addr);
+struct in6_addr ipv6_addr_bitand(const struct in6_addr *src,
+ const struct in6_addr *mask);
+struct in6_addr ipv6_create_mask(int mask);
+int ipv6_count_cidr_bits(const struct in6_addr *netmask);
+bool ipv6_is_cidr(const struct in6_addr *netmask);
+
+void *eth_compose(struct ofpbuf *, const uint8_t eth_dst[ETH_ADDR_LEN],
+ const uint8_t eth_src[ETH_ADDR_LEN], uint16_t eth_type,
+ size_t size);
+void *snap_compose(struct ofpbuf *, const uint8_t eth_dst[ETH_ADDR_LEN],
+ const uint8_t eth_src[ETH_ADDR_LEN],
+ unsigned int oui, uint16_t snap_type, size_t size);
+