allow dlz to signal that the view's transfer acl should be used

lib/dns/include/dns/dlz.h

@@ -107,10 +107,11 @@ typedef isc_result_t
  * the DNS server is performing a zone transfer query.  The driver's
  * method should return ISC_R_SUCCESS and a database pointer to the
  * name server if the zone is supported by the database, and zone
- * transfer is allowed.  Otherwise it will return ISC_R_NOTFOUND if
- * the zone is not supported by the database, or ISC_R_NOPERM if zone
- * transfers are not allowed.  If an error occurs it should return a
- * result code indicating the type of error.
+ * transfer is allowed.  If the view's transfer acl should be used,
+ * then the driver's method should return ISC_R_DEFAULT.  Otherwise,
+ * it should return ISC_R_NOTFOUND if the zone is not supported by
+ * the database, or ISC_R_NOPERM if zone transfers are not allowed.
+ * If an error occurs, the result code should indicate the type of error.
  */
 
 typedef isc_result_t

lib/dns/include/dns/view.h

@@ -100,7 +100,7 @@ struct dns_view {
 	dns_ntatable_t *		ntatable_priv;
 
 	isc_mutex_t			lock;
-	bool			frozen;
+	bool				frozen;
 	isc_task_t *			task;
 	isc_event_t			resevent;
 	isc_event_t			adbevent;
@@ -108,7 +108,7 @@ struct dns_view {
 	isc_stats_t *			adbstats;
 	isc_stats_t *			resstats;
 	dns_stats_t *			resquerystats;
-	bool			cacheshared;
+	bool				cacheshared;
 
 	/* Configurable data. */
 	dns_tsig_keyring_t *		statickeys;
@@ -144,14 +144,14 @@ struct dns_view {
 	dns_acl_t *			upfwdacl;
 	dns_acl_t *			denyansweracl;
 	dns_acl_t *			nocasecompress;
-	bool			msgcompression;
+	bool				msgcompression;
 	dns_rbt_t *			answeracl_exclude;
 	dns_rbt_t *			denyanswernames;
 	dns_rbt_t *			answernames_exclude;
 	dns_rrl_t *			rrl;
-	bool			provideixfr;
-	bool			requestnsid;
-	bool			sendcookie;
+	bool				provideixfr;
+	bool				requestnsid;
+	bool				sendcookie;
 	dns_ttl_t			maxcachettl;
 	dns_ttl_t			maxncachettl;
 	dns_ttl_t			mincachettl;
@@ -164,17 +164,17 @@ struct dns_view {
 	in_port_t			dstport;
 	dns_aclenv_t			aclenv;
 	dns_rdatatype_t			preferred_glue;
-	bool			flush;
+	bool				flush;
 	dns_namelist_t *		delonly;
-	bool			rootdelonly;
+	bool				rootdelonly;
 	dns_namelist_t *		rootexclude;
-	bool			checknames;
+	bool				checknames;
 	dns_name_t *			dlv;
 	dns_fixedname_t			dlv_fixed;
 	uint16_t			maxudp;
 	dns_ttl_t			staleanswerttl;
 	dns_stale_answer_t		staleanswersok;		/* rndc setting */
-	bool			staleanswersenable;	/* named.conf setting */
+	bool				staleanswersenable;	/* named.conf setting */
 	uint16_t			nocookieudp;
 	uint16_t			padding;
 	dns_acl_t *			pad_acl;
@@ -194,7 +194,7 @@ struct dns_view {
 	 */
 	dns_acl_t *			matchclients;
 	dns_acl_t *			matchdestinations;
-	bool			matchrecursiveonly;
+	bool				matchrecursiveonly;
 
 	/* Locked by themselves. */
 	isc_refcount_t			references;