print_supp
{ SADB_X_EXT_SUPPORTED_COMP, "supported_comp", print_supp },
static void print_supp(struct sadb_ext *, struct sadb_msg *, int);
{ SADB_EXT_SUPPORTED_AUTH, "supported_auth", print_supp },
{ SADB_EXT_SUPPORTED_ENCRYPT, "supported_encrypt", print_supp },