Initial commit after restructure

network/netutils/cleandns.go

@@ -0,0 +1,16 @@
+// Copyright Safing ICS Technologies GmbH. Use of this source code is governed by the AGPL license that can be found in the LICENSE file.
+
+package netutils
+
+import (
+	"regexp"
+)
+
+var (
+	// cleanDomainRegex = regexp.MustCompile("^(((?!-))(xn--)?[a-z0-9-_]{0,61}[a-z0-9]{1,1}\\.)*(xn--)?([a-z0-9-]{1,61}|[a-z0-9-]{1,30}\\.[a-z]{2,}\\.)$")
+	cleanDomainRegex = regexp.MustCompile("^((xn--)?[a-z0-9-_]{0,61}[a-z0-9]{1,1}\\.)*(xn--)?([a-z0-9-]{1,61}|[a-z0-9-]{1,30}\\.[a-z]{2,}\\.)$")
+)
+
+func IsValidFqdn(fqdn string) bool {
+	return cleanDomainRegex.MatchString(fqdn)
+}