This class is used as a ``glue'' to bind numeric packet type values with their symbolic names. When a new packet type is defined, its numeric code should be added to the enumeration packet_t (see ~ns/packet.h) 12.2 and its symbolic name should be added to the constructor of p_info:
enum packet_t { PT_TCP, ... PT_NTYPE // This MUST be the LAST one }; class p_info { public: p_info() { name_[PT_TCP]= "tcp"; ... } }