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ip6addr.h
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ip6addr.h
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/* common #include header for various helper routines to
* manipulate IP6 addreses.
*/
#ifndef _IP6ADDR_H_INCLUDED
#define _IP6ADDR_H_INCLUDED
/* IPv6 address is just 16 bytes. Sometimes only part of
* all 16 bytes can be used, most commonly it's 64 bits (8 bytes).
* All routines accepts pointer to ip6oct_t array of size IP6ADDR_FULL
* bytes.
*/
typedef unsigned char ip6oct_t;
#define IP6ADDR_FULL 16
#define IP6ADDR_HALF 8
/* parse string to ip6oct_t (if np specified, return
* pointer to the next characted in the input buffer)...: */
/* ..prefix, ffff:ffff:ffff...
* Return number of _bits_ (16,32,48,...) or <0 on error/ */
int ip6prefix(const char *s, ip6oct_t ap[IP6ADDR_FULL], char **np);
#define ip6addr(s,ap,np) ip6prefix((s),(ap),(np))
/* ..CIDR range, return number of bits or <0 if error.
* does NOT zerofill hostpart */
int ip6cidr(const char *s, ip6oct_t ap[IP6ADDR_FULL], char **np);
/* applies a /bits mask to v6 address in ap
* and optionally stores result into bp (if non-NULL).
* Both ap and bp are of size n bytes.
* return >1 if any of host bits in a are non-zero
* or 0 if all host bits are zero.
*/
int ip6mask(const ip6oct_t *ap, ip6oct_t *bp, unsigned n, unsigned bits);
/* inet_ntoa().
* This routine accepts `an' as size of ap buffer, in bytes.
*/
const char *ip6atos(const ip6oct_t *ap, unsigned an);
#endif