Show IPv4 areas for combined zone

Must not accidently overwrite v4 areas by v6 areas, when combined
zones have same name.

Changes

@@ -1,5 +1,9 @@
 {{$NEXT}}
 
+ - Fixed command 'export-netspoc'.
+   Show IPv4 areas for combined zone. Must not accidently overwrite
+   IPv4 areas by IPv6 areas, when combined zones have same name.
+
 6.074     2024-12-16 11:52:23+01:00 Europe/Berlin
 
  - Fixed wrong error on duplicate interface from router in ipv6/ directory.

go/pkg/pass1/export.go

@@ -182,12 +182,17 @@ func ipNatForObject(obj srvObj, dst jsonMap) {
 	}
 }
 
-// Zone with network 0/0 doesn't have an aggregate 0/0.
 func (c *spoc) getZoneName(z *zone) string {
+	// Ignore IPv6 part of dual stack zone.
+	// This must match check in exportZone2Areas.
+	if z.ipV6 && z.combined46 != nil {
+		z = z.combined46
+	}
 	ipp := c.getNetwork00(z.ipV6).ipp
 	if any := z.ipPrefix2aggregate[ipp]; any != nil {
 		return any.name
 	} else {
+		// Zone with network 0/0 doesn't have an aggregate 0/0.
 		return z.name
 	}
 }
@@ -1307,6 +1312,9 @@ func (c *spoc) exportMasterOwner(dir string, masterOwner string) {
 func (c *spoc) exportZone2Areas(dir string) {
 	result := make(jsonMap)
 	for _, z := range c.allZones {
+		if z.ipV6 && z.combined46 != nil {
+			continue
+		}
 		var l stringList
 		a := z.inArea
 		for a != nil {

go/testdata/export-netspoc/combined46.t

@@ -354,4 +354,27 @@ service:s1 = {
   "any:n2-v6"
  ]
 }
-=END=
+=END=
+
+############################################################
+=TITLE=Show v4 areas for combined zone
+=INPUT=
+area:all-v4 = { anchor = network:n1; ipv4_only; }
+area:all-v6 = { anchor = network:n1; ipv6_only; }
+area:a1-v4 = { border = interface:r1.n1; ipv4_only; }
+
+network:n1 = { ip = 10.1.1.0/24; ip6 = 2001:db8:1:1::/64; }
+network:n2 = { ip6 = 2001:db8:1:2::/64; }
+router:r1 = {
+ managed;
+ model = ASA;
+ interface:n1 = { ip = 10.1.1.1; ip6 = 2001:db8:1:1::1; hardware = n1; }
+ interface:n2 = { ip6 = 2001:db8:1:2::1; hardware = n2; }
+}
+=OUTPUT=
+--zone2areas
+{
+ "any:[network:n1]": [ "a1-v4", "all-v4" ],
+ "any:[network:n2]": [ "all-v6" ]
+}
+=END=