adjust timeout

google_httpdns.go

@@ -132,10 +132,10 @@ type RR struct {
 }
 
 var httpclient = &http.Client{
-	Timeout: 5 * time.Second,
+	Timeout: 8 * time.Second,
 	Transport: &http.Transport{
 		TLSClientConfig:     &tls.Config{ServerName: "dns.google.com"},
-		TLSHandshakeTimeout: 3 * time.Second,
+		TLSHandshakeTimeout: 5 * time.Second,
 	},
 }
 

handler.go

@@ -22,8 +22,8 @@ type dnsHandler struct {
 func newDNSHandler(cfg *conf) *dnsHandler {
 	return &dnsHandler{
 		cfg:         cfg,
-		tcpclient:   &dns.Client{Net: "tcp", Timeout: 2 * time.Second, UDPSize: 4096},
-		udpclient:   &dns.Client{Net: "udp", Timeout: 2 * time.Second, UDPSize: 4096},
+		tcpclient:   &dns.Client{Net: "tcp", Timeout: 8 * time.Second, UDPSize: 4096},
+		udpclient:   &dns.Client{Net: "udp", Timeout: 5 * time.Second, UDPSize: 4096},
 		httpsclient: &GoogleHTTPDns{},
 	}