Add new 'source[-v6]' option for remote servers

Add a new way to configure the preferred source address when talking to
remote servers such as primaries and parental-agents. This will
eventually deprecate options such as 'parental-source',
'parental-source-v6', 'transfer-source', etc.

Example of the new configuration:

    parental-agents "parents" port 5353 \
        source 10.10.10.10 port 5354 dscp 54 \
        source-v6 2001:db8::10 port 5355 dscp 55 {
	10.10.10.11;
	2001:db8::11;
    };

bin/tests/system/checkconf/good.conf.in

@@ -82,9 +82,9 @@ options {
 	transfer-source 0.0.0.0 dscp 63;
 	zone-statistics none;
 };
-parental-agents "parents" {
+parental-agents "parents" port 5353 source 10.10.10.10 port 5354 dscp 54 source-v6 2001:db8::10 port 5355 dscp 55 {
 	10.10.10.11;
-	10.10.10.12;
+	2001:db8::11;
 };
 view "first" {
 	match-clients {

doc/man/named.conf.5in

@@ -126,7 +126,7 @@ options {
 	allow\-transfer [ port <integer> ] [ transport <string> ] { <address_match_element>; ... };
 	allow\-update { <address_match_element>; ... };
 	allow\-update\-forwarding { <address_match_element>; ... };
-	also\-notify [ port <integer> ] [ dscp <integer> ] { ( <remote\-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
+	also\-notify [ port <integer> ] [ dscp <integer> ] [ source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] [ source\-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] { ( <remote\-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
 	alt\-transfer\-source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ]; // deprecated
 	alt\-transfer\-source\-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ]; // deprecated
 	answer\-cookie <boolean>;
@@ -138,7 +138,7 @@ options {
 	avoid\-v6\-udp\-ports { <portrange>; ... };
 	bindkeys\-file <quoted_string>;
 	blackhole { <address_match_element>; ... };
-	catalog\-zones { zone <string> [ default\-primaries [ port <integer> ] [ dscp <integer> ] { ( <remote\-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... } ] [ zone\-directory <quoted_string> ] [ in\-memory <boolean> ] [ min\-update\-interval <duration> ]; ... };
+	catalog\-zones { zone <string> [ default\-primaries [ port <integer> ] [ dscp <integer> ] [ source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] [ source\-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] { ( <remote\-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... } ] [ zone\-directory <quoted_string> ] [ in\-memory <boolean> ] [ min\-update\-interval <duration> ]; ... };
 	check\-dup\-records ( fail | warn | ignore );
 	check\-integrity <boolean>;
 	check\-mx ( fail | warn | ignore );
@@ -373,11 +373,11 @@ options {
 	zone\-statistics ( full | terse | none | <boolean> );
 };
 
-parental\-agents <string> [ port <integer> ] [ dscp <integer> ] { ( <remote\-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... }; // may occur multiple times
+parental\-agents <string> [ port <integer> ] [ dscp <integer> ] [ source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] [ source\-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] { ( <remote\-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... }; // may occur multiple times
 
 plugin ( query ) <string> [ { <unspecified\-text> } ]; // may occur multiple times
 
-primaries <string> [ port <integer> ] [ dscp <integer> ] { ( <remote\-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... }; // may occur multiple times
+primaries <string> [ port <integer> ] [ dscp <integer> ] [ source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] [ source\-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] { ( <remote\-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... }; // may occur multiple times
 
 server <netprefix> {
 	bogus <boolean>;
@@ -437,13 +437,13 @@ view <string> [ <class> ] {
 	allow\-transfer [ port <integer> ] [ transport <string> ] { <address_match_element>; ... };
 	allow\-update { <address_match_element>; ... };
 	allow\-update\-forwarding { <address_match_element>; ... };
-	also\-notify [ port <integer> ] [ dscp <integer> ] { ( <remote\-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
+	also\-notify [ port <integer> ] [ dscp <integer> ] [ source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] [ source\-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] { ( <remote\-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
 	alt\-transfer\-source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ]; // deprecated
 	alt\-transfer\-source\-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ]; // deprecated
 	attach\-cache <string>;
 	auth\-nxdomain <boolean>;
 	auto\-dnssec ( allow | maintain | off ); // deprecated
-	catalog\-zones { zone <string> [ default\-primaries [ port <integer> ] [ dscp <integer> ] { ( <remote\-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... } ] [ zone\-directory <quoted_string> ] [ in\-memory <boolean> ] [ min\-update\-interval <duration> ]; ... };
+	catalog\-zones { zone <string> [ default\-primaries [ port <integer> ] [ dscp <integer> ] [ source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] [ source\-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] { ( <remote\-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... } ] [ zone\-directory <quoted_string> ] [ in\-memory <boolean> ] [ min\-update\-interval <duration> ]; ... };
 	check\-dup\-records ( fail | warn | ignore );
 	check\-integrity <boolean>;
 	check\-mx ( fail | warn | ignore );
@@ -666,7 +666,7 @@ zone <string> [ <class> ] {
 	allow\-query\-on { <address_match_element>; ... };
 	allow\-transfer [ port <integer> ] [ transport <string> ] { <address_match_element>; ... };
 	allow\-update { <address_match_element>; ... };
-	also\-notify [ port <integer> ] [ dscp <integer> ] { ( <remote\-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
+	also\-notify [ port <integer> ] [ dscp <integer> ] [ source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] [ source\-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] { ( <remote\-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
 	alt\-transfer\-source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ]; // deprecated
 	alt\-transfer\-source\-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ]; // deprecated
 	auto\-dnssec ( allow | maintain | off ); // deprecated
@@ -710,7 +710,7 @@ zone <string> [ <class> ] {
 	notify\-source\-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ];
 	notify\-to\-soa <boolean>;
 	nsec3\-test\-zone <boolean>; // test only
-	parental\-agents [ port <integer> ] [ dscp <integer> ] { ( <remote\-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
+	parental\-agents [ port <integer> ] [ dscp <integer> ] [ source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] [ source\-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] { ( <remote\-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
 	parental\-source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ];
 	parental\-source\-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ];
 	serial\-update\-method ( date | increment | unixtime );
@@ -740,7 +740,7 @@ zone <string> [ <class> ] {
 	allow\-query\-on { <address_match_element>; ... };
 	allow\-transfer [ port <integer> ] [ transport <string> ] { <address_match_element>; ... };
 	allow\-update\-forwarding { <address_match_element>; ... };
-	also\-notify [ port <integer> ] [ dscp <integer> ] { ( <remote\-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
+	also\-notify [ port <integer> ] [ dscp <integer> ] [ source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] [ source\-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] { ( <remote\-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
 	alt\-transfer\-source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ]; // deprecated
 	alt\-transfer\-source\-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ]; // deprecated
 	auto\-dnssec ( allow | maintain | off ); // deprecated
@@ -780,10 +780,10 @@ zone <string> [ <class> ] {
 	notify\-source\-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ];
 	notify\-to\-soa <boolean>;
 	nsec3\-test\-zone <boolean>; // test only
-	parental\-agents [ port <integer> ] [ dscp <integer> ] { ( <remote\-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
+	parental\-agents [ port <integer> ] [ dscp <integer> ] [ source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] [ source\-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] { ( <remote\-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
 	parental\-source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ];
 	parental\-source\-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ];
-	primaries [ port <integer> ] [ dscp <integer> ] { ( <remote\-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
+	primaries [ port <integer> ] [ dscp <integer> ] [ source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] [ source\-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] { ( <remote\-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
 	request\-expire <boolean>;
 	request\-ixfr <boolean>;
 	sig\-signing\-nodes <integer>;
@@ -815,7 +815,7 @@ zone <string> [ <class> ] {
 	allow\-query\-on { <address_match_element>; ... };
 	allow\-transfer [ port <integer> ] [ transport <string> ] { <address_match_element>; ... };
 	allow\-update\-forwarding { <address_match_element>; ... };
-	also\-notify [ port <integer> ] [ dscp <integer> ] { ( <remote\-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
+	also\-notify [ port <integer> ] [ dscp <integer> ] [ source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] [ source\-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] { ( <remote\-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
 	alt\-transfer\-source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ]; // deprecated
 	alt\-transfer\-source\-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ]; // deprecated
 	check\-names ( fail | warn | ignore );
@@ -841,7 +841,7 @@ zone <string> [ <class> ] {
 	notify\-delay <integer>;
 	notify\-source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ];
 	notify\-source\-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ];
-	primaries [ port <integer> ] [ dscp <integer> ] { ( <remote\-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
+	primaries [ port <integer> ] [ dscp <integer> ] [ source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] [ source\-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] { ( <remote\-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
 	request\-expire <boolean>;
 	request\-ixfr <boolean>;
 	transfer\-source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ];
@@ -903,7 +903,7 @@ zone <string> [ <class> ] {
 	masterfile\-style ( full | relative );
 	max\-records <integer>;
 	max\-zone\-ttl ( unlimited | <duration> ); // deprecated
-	primaries [ port <integer> ] [ dscp <integer> ] { ( <remote\-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
+	primaries [ port <integer> ] [ dscp <integer> ] [ source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] [ source\-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] { ( <remote\-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
 	zone\-statistics ( full | terse | none | <boolean> );
 };
 
@@ -958,7 +958,7 @@ zone <string> [ <class> ] {
 	min\-refresh\-time <integer>;
 	min\-retry\-time <integer>;
 	multi\-master <boolean>;
-	primaries [ port <integer> ] [ dscp <integer> ] { ( <remote\-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
+	primaries [ port <integer> ] [ dscp <integer> ] [ source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] [ source\-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] { ( <remote\-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
 	transfer\-source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ];
 	transfer\-source\-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ];
 	use\-alt\-transfer\-source <boolean>; // deprecated

doc/misc/mirror.zoneopt

@@ -5,7 +5,7 @@ zone <string> [ <class> ] {
 	allow-query-on { <address_match_element>; ... };
 	allow-transfer [ port <integer> ] [ transport <string> ] { <address_match_element>; ... };
 	allow-update-forwarding { <address_match_element>; ... };
-	also-notify [ port <integer> ] [ dscp <integer> ] { ( <remote-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
+	also-notify [ port <integer> ] [ dscp <integer> ] [ source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] [ source-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] { ( <remote-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
 	alt-transfer-source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ]; // deprecated
 	alt-transfer-source-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ]; // deprecated
 	check-names ( fail | warn | ignore );
@@ -31,7 +31,7 @@ zone <string> [ <class> ] {
 	notify-delay <integer>;
 	notify-source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ];
 	notify-source-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ];
-	primaries [ port <integer> ] [ dscp <integer> ] { ( <remote-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
+	primaries [ port <integer> ] [ dscp <integer> ] [ source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] [ source-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] { ( <remote-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
 	request-expire <boolean>;
 	request-ixfr <boolean>;
 	transfer-source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ];

doc/misc/options

@@ -69,7 +69,7 @@ options {
 	allow-transfer [ port <integer> ] [ transport <string> ] { <address_match_element>; ... };
 	allow-update { <address_match_element>; ... };
 	allow-update-forwarding { <address_match_element>; ... };
-	also-notify [ port <integer> ] [ dscp <integer> ] { ( <remote-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
+	also-notify [ port <integer> ] [ dscp <integer> ] [ source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] [ source-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] { ( <remote-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
 	alt-transfer-source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ]; // deprecated
 	alt-transfer-source-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ]; // deprecated
 	answer-cookie <boolean>;
@@ -81,7 +81,7 @@ options {
 	avoid-v6-udp-ports { <portrange>; ... };
 	bindkeys-file <quoted_string>;
 	blackhole { <address_match_element>; ... };
-	catalog-zones { zone <string> [ default-primaries [ port <integer> ] [ dscp <integer> ] { ( <remote-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... } ] [ zone-directory <quoted_string> ] [ in-memory <boolean> ] [ min-update-interval <duration> ]; ... };
+	catalog-zones { zone <string> [ default-primaries [ port <integer> ] [ dscp <integer> ] [ source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] [ source-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] { ( <remote-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... } ] [ zone-directory <quoted_string> ] [ in-memory <boolean> ] [ min-update-interval <duration> ]; ... };
 	check-dup-records ( fail | warn | ignore );
 	check-integrity <boolean>;
 	check-mx ( fail | warn | ignore );
@@ -316,11 +316,11 @@ options {
 	zone-statistics ( full | terse | none | <boolean> );
 };
 
-parental-agents <string> [ port <integer> ] [ dscp <integer> ] { ( <remote-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... }; // may occur multiple times
+parental-agents <string> [ port <integer> ] [ dscp <integer> ] [ source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] [ source-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] { ( <remote-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... }; // may occur multiple times
 
 plugin ( query ) <string> [ { <unspecified-text> } ]; // may occur multiple times
 
-primaries <string> [ port <integer> ] [ dscp <integer> ] { ( <remote-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... }; // may occur multiple times
+primaries <string> [ port <integer> ] [ dscp <integer> ] [ source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] [ source-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] { ( <remote-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... }; // may occur multiple times
 
 server <netprefix> {
 	bogus <boolean>;
@@ -380,13 +380,13 @@ view <string> [ <class> ] {
 	allow-transfer [ port <integer> ] [ transport <string> ] { <address_match_element>; ... };
 	allow-update { <address_match_element>; ... };
 	allow-update-forwarding { <address_match_element>; ... };
-	also-notify [ port <integer> ] [ dscp <integer> ] { ( <remote-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
+	also-notify [ port <integer> ] [ dscp <integer> ] [ source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] [ source-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] { ( <remote-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
 	alt-transfer-source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ]; // deprecated
 	alt-transfer-source-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ]; // deprecated
 	attach-cache <string>;
 	auth-nxdomain <boolean>;
 	auto-dnssec ( allow | maintain | off ); // deprecated
-	catalog-zones { zone <string> [ default-primaries [ port <integer> ] [ dscp <integer> ] { ( <remote-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... } ] [ zone-directory <quoted_string> ] [ in-memory <boolean> ] [ min-update-interval <duration> ]; ... };
+	catalog-zones { zone <string> [ default-primaries [ port <integer> ] [ dscp <integer> ] [ source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] [ source-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] { ( <remote-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... } ] [ zone-directory <quoted_string> ] [ in-memory <boolean> ] [ min-update-interval <duration> ]; ... };
 	check-dup-records ( fail | warn | ignore );
 	check-integrity <boolean>;
 	check-mx ( fail | warn | ignore );

doc/misc/primary.zoneopt

@@ -4,7 +4,7 @@ zone <string> [ <class> ] {
 	allow-query-on { <address_match_element>; ... };
 	allow-transfer [ port <integer> ] [ transport <string> ] { <address_match_element>; ... };
 	allow-update { <address_match_element>; ... };
-	also-notify [ port <integer> ] [ dscp <integer> ] { ( <remote-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
+	also-notify [ port <integer> ] [ dscp <integer> ] [ source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] [ source-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] { ( <remote-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
 	alt-transfer-source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ]; // deprecated
 	alt-transfer-source-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ]; // deprecated
 	auto-dnssec ( allow | maintain | off ); // deprecated
@@ -48,7 +48,7 @@ zone <string> [ <class> ] {
 	notify-source-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ];
 	notify-to-soa <boolean>;
 	nsec3-test-zone <boolean>; // test only
-	parental-agents [ port <integer> ] [ dscp <integer> ] { ( <remote-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
+	parental-agents [ port <integer> ] [ dscp <integer> ] [ source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] [ source-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] { ( <remote-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
 	parental-source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ];
 	parental-source-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ];
 	serial-update-method ( date | increment | unixtime );

doc/misc/redirect.zoneopt

@@ -8,6 +8,6 @@ zone <string> [ <class> ] {
 	masterfile-style ( full | relative );
 	max-records <integer>;
 	max-zone-ttl ( unlimited | <duration> ); // deprecated
-	primaries [ port <integer> ] [ dscp <integer> ] { ( <remote-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
+	primaries [ port <integer> ] [ dscp <integer> ] [ source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] [ source-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] { ( <remote-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
 	zone-statistics ( full | terse | none | <boolean> );
 };

doc/misc/secondary.zoneopt

@@ -5,7 +5,7 @@ zone <string> [ <class> ] {
 	allow-query-on { <address_match_element>; ... };
 	allow-transfer [ port <integer> ] [ transport <string> ] { <address_match_element>; ... };
 	allow-update-forwarding { <address_match_element>; ... };
-	also-notify [ port <integer> ] [ dscp <integer> ] { ( <remote-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
+	also-notify [ port <integer> ] [ dscp <integer> ] [ source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] [ source-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] { ( <remote-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
 	alt-transfer-source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ]; // deprecated
 	alt-transfer-source-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ]; // deprecated
 	auto-dnssec ( allow | maintain | off ); // deprecated
@@ -45,10 +45,10 @@ zone <string> [ <class> ] {
 	notify-source-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ];
 	notify-to-soa <boolean>;
 	nsec3-test-zone <boolean>; // test only
-	parental-agents [ port <integer> ] [ dscp <integer> ] { ( <remote-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
+	parental-agents [ port <integer> ] [ dscp <integer> ] [ source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] [ source-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] { ( <remote-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
 	parental-source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ];
 	parental-source-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ];
-	primaries [ port <integer> ] [ dscp <integer> ] { ( <remote-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
+	primaries [ port <integer> ] [ dscp <integer> ] [ source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] [ source-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] { ( <remote-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
 	request-expire <boolean>;
 	request-ixfr <boolean>;
 	sig-signing-nodes <integer>;

doc/misc/stub.zoneopt

@@ -19,7 +19,7 @@ zone <string> [ <class> ] {
 	min-refresh-time <integer>;
 	min-retry-time <integer>;
 	multi-master <boolean>;
-	primaries [ port <integer> ] [ dscp <integer> ] { ( <remote-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
+	primaries [ port <integer> ] [ dscp <integer> ] [ source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] [ source-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ] ] { ( <remote-servers> | <ipv4_address> [ port <integer> ] | <ipv6_address> [ port <integer> ] ) [ key <string> ] [ tls <string> ]; ... };
 	transfer-source ( <ipv4_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ];
 	transfer-source-v6 ( <ipv6_address> | * ) [ port ( <integer> | * ) ] [ dscp <integer> ];
 	use-alt-transfer-source <boolean>; // deprecated

lib/isccfg/namedconf.c

@@ -121,6 +121,8 @@ static cfg_type_t cfg_type_optional_dscp;
 static cfg_type_t cfg_type_optional_facility;
 static cfg_type_t cfg_type_optional_keyref;
 static cfg_type_t cfg_type_optional_port;
+static cfg_type_t cfg_type_optional_sourceaddr4;
+static cfg_type_t cfg_type_optional_sourceaddr6;
 static cfg_type_t cfg_type_optional_uint32;
 static cfg_type_t cfg_type_optional_tls;
 static cfg_type_t cfg_type_options;
@@ -234,6 +236,8 @@ static cfg_tuplefielddef_t remotes_fields[] = {
 	{ "name", &cfg_type_astring, 0 },
 	{ "port", &cfg_type_optional_port, 0 },
 	{ "dscp", &cfg_type_optional_dscp, 0 },
+	{ "source", &cfg_type_optional_sourceaddr4, 0 },
+	{ "source-v6", &cfg_type_optional_sourceaddr6, 0 },
 	{ "addresses", &cfg_type_bracketed_namesockaddrkeylist, 0 },
 	{ NULL, NULL, 0 }
 };
@@ -273,6 +277,8 @@ static cfg_type_t cfg_type_bracketed_namesockaddrkeylist = {
 static cfg_tuplefielddef_t namesockaddrkeylist_fields[] = {
 	{ "port", &cfg_type_optional_port, 0 },
 	{ "dscp", &cfg_type_optional_dscp, 0 },
+	{ "source", &cfg_type_optional_sourceaddr4, 0 },
+	{ "source-v6", &cfg_type_optional_sourceaddr6, 0 },
 	{ "addresses", &cfg_type_bracketed_namesockaddrkeylist, 0 },
 	{ NULL, NULL, 0 }
 };
@@ -3573,6 +3579,20 @@ static cfg_type_t cfg_type_sockaddr6wild = {
 	cfg_doc_sockaddr, &cfg_rep_sockaddr,  &sockaddr6wild_flags
 };
 
+static keyword_type_t sourceaddr4_kw = { "source", &cfg_type_sockaddr4wild };
+
+static cfg_type_t cfg_type_optional_sourceaddr4 = {
+	"optional_sourceaddr4", parse_optional_keyvalue, print_keyvalue,
+	doc_optional_keyvalue,	&cfg_rep_sockaddr,	 &sourceaddr4_kw
+};
+
+static keyword_type_t sourceaddr6_kw = { "source-v6", &cfg_type_sockaddr6wild };
+
+static cfg_type_t cfg_type_optional_sourceaddr6 = {
+	"optional_sourceaddr6", parse_optional_keyvalue, print_keyvalue,
+	doc_optional_keyvalue,	&cfg_rep_sockaddr,	 &sourceaddr6_kw
+};
+
 /*%
  * rndc
  */