+
+ /* For local sockets we do not translate IPv6 addresses back
+ * to IPv6 if applicable, since this is usually used for
+ * listening sockets where the difference between IPv4 and
+ * IPv6 matters. */
+
+ return sockaddr_pretty(&sa.sa, salen, false, ret);
+}
+
+int socket_address_unlink(SocketAddress *a) {
+ assert(a);
+
+ if (socket_address_family(a) != AF_UNIX)
+ return 0;
+
+ if (a->sockaddr.un.sun_path[0] == 0)
+ return 0;
+
+ if (unlink(a->sockaddr.un.sun_path) < 0)
+ return -errno;
+
+ return 1;
+}
+
+int in_addr_null(unsigned family, union in_addr_union *u) {
+ assert(u);
+
+ if (family == AF_INET)
+ return u->in.s_addr == 0;
+
+ if (family == AF_INET6)
+ return
+ u->in6.s6_addr32[0] == 0 &&
+ u->in6.s6_addr32[1] == 0 &&
+ u->in6.s6_addr32[2] == 0 &&
+ u->in6.s6_addr32[3] == 0;
+
+ return -EAFNOSUPPORT;
+}
+
+
+int in_addr_equal(unsigned family, union in_addr_union *a, union in_addr_union *b) {
+ assert(a);
+ assert(b);
+
+ if (family == AF_INET)
+ return a->in.s_addr == b->in.s_addr;
+
+ if (family == AF_INET6)
+ return
+ a->in6.s6_addr32[0] == b->in6.s6_addr32[0] &&
+ a->in6.s6_addr32[1] == b->in6.s6_addr32[1] &&
+ a->in6.s6_addr32[2] == b->in6.s6_addr32[2] &&
+ a->in6.s6_addr32[3] == b->in6.s6_addr32[3];
+
+ return -EAFNOSUPPORT;
+}
+
+int in_addr_prefix_intersect(
+ unsigned family,
+ const union in_addr_union *a,
+ unsigned aprefixlen,
+ const union in_addr_union *b,
+ unsigned bprefixlen) {
+
+ unsigned m;
+
+ assert(a);
+ assert(b);
+
+ /* Checks whether there are any addresses that are in both
+ * networks */
+
+ m = MIN(aprefixlen, bprefixlen);
+
+ if (family == AF_INET) {
+ uint32_t x, nm;
+
+ x = be32toh(a->in.s_addr ^ b->in.s_addr);
+ nm = (m == 0) ? 0 : 0xFFFFFFFFUL << (32 - m);
+
+ return (x & nm) == 0;