extern u_int usb_linux_64_byte_print(const struct pcap_pkthdr *, const u_char *);
#ifdef INET6
-extern void ip6_print(const u_char *, u_int);
extern void ip6_opt_print(const u_char *, int);
extern int hbhopt_print(const u_char *);
extern int dstopt_print(const u_char *);