22 #ifndef NDN_ENCODING_NFD_CONSTANTS_HPP    23 #define NDN_ENCODING_NFD_CONSTANTS_HPP   135 #endif // NDN_ENCODING_NFD_CONSTANTS_HPP 
std::istream & operator>>(std::istream &is, RouteOrigin &routeOrigin)
extract RouteOrigin from stream 
whether congestion detection and marking is enabled on a face 
whether the link reliability feature is enabled on a face 
face went UP (from DOWN state) 
enables the CS to satisfy Interests using cached Data 
Common includes and macros used throughout the library. 
enables the CS to admit new Data 
std::ostream & operator<<(std::ostream &os, FaceScope faceScope)
CsFlagBit
CS enablement flags. 
whether local fields are enabled on a face 
const uint64_t INVALID_FACE_ID
face went DOWN (from UP state)