#ifndef IP6_H
#define IP6_H

#include "byte.h"

extern unsigned int scan_ip6(const char *src,char *ip);
extern unsigned int fmt_ip6(char *dest,const char *ip);

extern unsigned int scan_ip6_flat(const char *src,char *);
extern unsigned int fmt_ip6_flat(char *dest,const char *);

/*
 ip6 address syntax: (h = hex digit), no leading '0' required
   1. hhhh:hhhh:hhhh:hhhh:hhhh:hhhh:hhhh:hhhh
   2. any number of 0000 may be abbreviated as "::", but only once
 flat ip6 address syntax:
   hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
 */

#define IP6_FMT 40

extern const unsigned char V4mappedprefix[12]; /*={0,0,0,0,0,0,0,0,0,0,0xff,0xff}; */
extern const unsigned char V6loopback[16]; /*={0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1}; */
extern const unsigned char V6any[16]; /*={0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}; */

#define ip6_isv4mapped(ip) (byte_equal(ip,12,V4mappedprefix))

#endif