Add ntp protocol sniffing

route/route.go

@@ -607,6 +607,7 @@ func (r *Router) actionSniff(
 							sniff.UTP,
 							sniff.UDPTracker,
 							sniff.DTLSRecord,
+							sniff.NTP,
 						}
 					}
 					err = sniff.PeekPacket(

route/rule/rule_action.go

@@ -368,6 +368,8 @@ func (r *RuleActionSniff) build() error {
 			r.StreamSniffers = append(r.StreamSniffers, sniff.SSH)
 		case C.ProtocolRDP:
 			r.StreamSniffers = append(r.StreamSniffers, sniff.RDP)
+		case C.ProtocolNTP:
+			r.PacketSniffers = append(r.PacketSniffers, sniff.NTP)
 		default:
 			return E.New("unknown sniffer: ", name)
 		}