AF_MAX 228 include/linux/socket.h #define PF_MAX AF_MAX AF_MAX 77 include/net/netfilter/nf_conntrack_l3proto.h extern struct nf_conntrack_l3proto __rcu *nf_ct_l3protos[AF_MAX]; AF_MAX 97 include/net/netfilter/nf_conntrack_l3proto.h if (unlikely(l3proto >= AF_MAX)) AF_MAX 24 include/uapi/linux/net.h #define NPROTO AF_MAX