Maint: split Go files in dns package

internal/dns/update.go

@@ -0,0 +1,25 @@
+package dns
+
+import "context"
+
+func (l *looper) updateFiles(ctx context.Context) (err error) {
+	l.logger.Info("downloading DNS over TLS cryptographic files")
+	if err := l.conf.SetupFiles(ctx); err != nil {
+		return err
+	}
+	settings := l.GetSettings()
+
+	l.logger.Info("downloading hostnames and IP block lists")
+	blockedHostnames, blockedIPs, blockedIPPrefixes, errs := l.blockBuilder.All(
+		ctx, settings.BlacklistBuild)
+	for _, err := range errs {
+		l.logger.Warn(err.Error())
+	}
+
+	// TODO change to BlockHostnames() when migrating to qdm12/dns v2
+	settings.Unbound.Blacklist.FqdnHostnames = blockedHostnames
+	settings.Unbound.Blacklist.IPs = blockedIPs
+	settings.Unbound.Blacklist.IPPrefixes = blockedIPPrefixes
+
+	return l.conf.MakeUnboundConf(settings.Unbound)
+}