Accept wildcards in RR's name.

src/storage/zone.cr

@@ -183,7 +183,7 @@ class DNSManager::Storage::Zone
 		def get_errors : Array(Error)
 			errors = [] of Error
 
-			unless Zone.is_subdomain_valid? @name
+			unless Zone.is_valid_name? @name
 				errors << "A invalid subdomain: #{@name}"
 			end
 
@@ -205,7 +205,7 @@ class DNSManager::Storage::Zone
 		def get_errors : Array(Error)
 			errors = [] of Error
 
-			unless Zone.is_subdomain_valid? @name
+			unless Zone.is_valid_name? @name
 				errors << "AAAA invalid subdomain: #{@name}"
 			end
 
@@ -227,7 +227,7 @@ class DNSManager::Storage::Zone
 		def get_errors : Array(Error)
 			errors = [] of Error
 
-			unless Zone.is_subdomain_valid? @name
+			unless Zone.is_valid_name? @name
 				errors << "TXT invalid subdomain: #{@name}"
 			end
 
@@ -284,7 +284,7 @@ class DNSManager::Storage::Zone
 		def get_errors : Array(Error)
 			errors = [] of Error
 
-			unless Zone.is_subdomain_valid? @name
+			unless Zone.is_valid_name? @name
 				errors << "NS invalid subdomain: #{@name}"
 			end
 
@@ -302,7 +302,7 @@ class DNSManager::Storage::Zone
 		def get_errors : Array(Error)
 			errors = [] of Error
 
-			unless Zone.is_subdomain_valid? @name
+			unless Zone.is_valid_name? @name
 				errors << "CNAME invalid subdomain: #{@name}"
 			end
 
@@ -452,7 +452,7 @@ class DNSManager::Storage::Zone
 		def get_errors : Array(Error)
 			errors = [] of Error
 
-			unless Zone.is_subdomain_valid? @name
+			unless Zone.is_valid_name? @name
 				errors << "SPF invalid subdomain: #{@name}"
 			end
 
@@ -558,7 +558,7 @@ class DNSManager::Storage::Zone
 		def get_errors : Array(Error)
 			errors = [] of Error
 
-			unless Zone.is_subdomain_valid? @name
+			unless Zone.is_valid_name? @name
 				errors << "DKIM invalid subdomain: #{@name}"
 			end
 
@@ -716,7 +716,7 @@ class DNSManager::Storage::Zone
 			errors = [] of Error
 
 			# TODO: label can (and is expected to) start with an underscore.
-			#unless Zone.is_subdomain_valid? @name
+			#unless Zone.is_valid_name? @name
 			#	errors << "DMARC invalid subdomain: #{@name}"
 			#end
 
@@ -780,7 +780,7 @@ class DNSManager::Storage::Zone
 		def get_errors : Array(Error)
 			errors = [] of Error
 
-			unless Zone.is_subdomain_valid? @name
+			unless Zone.is_valid_name? @name
 				errors << "CAA invalid subdomain: #{@name}"
 			end
 
@@ -818,7 +818,7 @@ class DNSManager::Storage::Zone
 		def get_errors : Array(Error)
 			errors = [] of Error
 
-			unless Zone.is_subdomain_valid? @name
+			unless Zone.is_valid_name? @name
 				errors << "MX invalid subdomain: #{@name}"
 			end
 
@@ -983,6 +983,22 @@ class DNSManager::Storage::Zone
 		false
 	end
 
+	# Valid names: valid subdomains, wildcards alone or followed by a subdomain.
+	def self.is_valid_name?(subdomain) : Bool
+		if subdomain =~ subdomain_pattern
+			true
+		elsif subdomain =~ /^[*]$/
+			true
+		elsif subdomain[0..1] =~ /^[*][.]$/ && subdomain[2..] =~ subdomain_pattern
+			true
+		else
+			false
+		end
+	rescue e
+		Baguette::Log.error "invalid zone subdomain #{subdomain}: #{e}"
+		false
+	end
+
 	# This regex only is "good enough for now".
 	def self.is_subdomain_valid?(subdomain) : Bool
 		if subdomain =~ subdomain_pattern