additional data support

lib/dns/include/dns/rdataset.h

@@ -289,6 +289,34 @@ dns_rdataset_towire(dns_rdataset_t *rdataset,
  *	dns_name_towire().
  */
 
+dns_result_t
+dns_rdataset_additionaldata(dns_rdataset_t *rdataset,
+			    dns_additionaldatafunc_t add, void *arg);
+/*
+ * For each rdata in rdataset, call 'add' for each name and type in the
+ * rdata which is subject to additional section processing.
+ *
+ * Requires:
+ *
+ *	'rdataset' is a valid, non-question rdataset.
+ *
+ *	'add' is a valid dns_additionaldatafunc_t
+ *
+ * Ensures:
+ *
+ *	If successful, dns_rdata_additionaldata() will have been called for
+ *	each rdata in 'rdataset'.
+ *
+ *	If a call to dns_rdata_additionaldata() is not successful, the
+ *	result returned will be the result of dns_rdataset_additionaldata().
+ *
+ * Returns:
+ *
+ *	DNS_R_SUCCESS
+ *
+ *	Any error that dns_rdata_additionaldata() can return.
+ */
+
 ISC_LANG_ENDDECLS
 
 #endif /* DNS_RDATASET_H */

lib/dns/include/dns/types.h

@@ -162,6 +162,9 @@ enum {
 typedef isc_result_t
 (*dns_addrdatasetfunc_t)(void *, dns_name_t *, dns_rdataset_t *);
 
+typedef isc_result_t
+(*dns_additionaldatafunc_t)(void *, dns_name_t *, dns_rdatatype_t);
+
 ISC_LANG_ENDDECLS
 
 #endif /* DNS_TYPES_H */