nfa_type 27 include/uapi/linux/netfilter/nfnetlink_compat.h __u16 nfa_type; /* we use 15 bits for the type, and the highest nfa_type 35 include/uapi/linux/netfilter/nfnetlink_compat.h #define NFA_TYPE(attr) ((attr)->nfa_type & 0x7fff)