/**
  * 获取协议名字
  * @param CatLib\Constraint\Network\IPacket $packet 协议包
  */
 protected function getProtoClassName(IPacket $packet)
 {
     $protoID = $packet->protoID();
     $protoName = $this->getProtoName($protoID);
     if ($protoName == null) {
         return null;
     }
     $protoName = $this->getPackage() . str_replace($this->protoPrefix, "", $protoName);
     return "\\" . $protoName;
 }