+ whois, rdns: begin getting info for the most active clients on startup

home/dns.go

@@ -60,6 +60,18 @@ func initDNSServer() {
 
 	config.dnsctx.rdns = InitRDNS(&config.clients)
 	config.dnsctx.whois = initWhois(&config.clients)
+
+	topClients := config.stats.GetTopData(30)
+	for _, ip := range topClients {
+		ipAddr := net.ParseIP(ip)
+		if !ipAddr.IsLoopback() {
+			config.dnsctx.rdns.Begin(ip)
+		}
+		if isPublicIP(ipAddr) {
+			config.dnsctx.whois.Begin(ip)
+		}
+	}
+
 	initFiltering()
 }