extern void fn_print_char(netdissect_options *, u_char);
extern void fn_print_str(netdissect_options *, const u_char *);
extern u_int nd_printztn(netdissect_options *, const u_char *, u_int, const u_char *);
extern void fn_print_char(netdissect_options *, u_char);
extern void fn_print_str(netdissect_options *, const u_char *);
extern u_int nd_printztn(netdissect_options *, const u_char *, u_int, const u_char *);