22 #ifndef NDN_DETAIL_PACKET_BASE_HPP    23 #define NDN_DETAIL_PACKET_BASE_HPP    47 #endif // NDN_DETAIL_PACKET_BASE_HPP 
Base class to store tag information (e.g., inside Interest and Data packets) 
uint64_t getCongestionMark() const
get the value of the CongestionMark tag 
void setCongestionMark(uint64_t mark)
set the CongestionMark tag to the specified value 
base class to allow simple management of packet tags