-extern void adns__sockaddr_inject(const union gen_addr *a, int port,
- struct sockaddr *sa);
-/* Inject fields into the socket adress sa. If a is not null, copy the
- * address in; if port is not -1, then copy the port (converting from host
- * byte-order). Assumes that sa->sa_family is already set correctly.
+extern bool adns__revparse_label(struct revparse_state *rps, int labnum,
+ const char *dgram,
+ int labstart, int lablen);
+/* Parse a label in a reverse-domain name, given its index labnum (starting
+ * from zero), a pointer to its contents (which need not be null-terminated),
+ * and its length. The state in *rps is initialized implicitly when labnum
+ * is zero.
+ *
+ * Returns 1 if the parse is proceeding successfully, 0 if the domain
+ * name is definitely invalid and the parse must be abandoned.
+ */
+
+extern bool adns__revparse_done(struct revparse_state *rps,
+ const char *dgram, int nlabels,
+ adns_rrtype *rrtype_r, adns_sockaddr *addr_r);
+/* Finishes parsing a reverse-domain name, given the total number of
+ * labels in the name. On success, fills in the af and protocol
+ * address in *addr_r, and the forward query type in *rrtype_r
+ * (because that turns out to be useful). Returns 1 if the parse
+ * was successful.