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EUI64(3)	       FreeBSD Library Functions Manual		      EUI64(3)

NAME
     eui64, eui64_aton,	eui64_ntoa, eui64_ntohost, eui64_hostton -- IEEE
     EUI-64 conversion and lookup routines

LIBRARY
     Standard C	Library	(libc, -lc)

SYNOPSIS
     #include <sys/types.h>
     #include <sys/eui64.h>

     int
     eui64_aton(const char *a, struct eui64 *e);

     int
     eui64_ntoa(const struct eui64 *id,	char *a, size_t	len);

     int
     eui64_ntohost(char	*hostname, size_t len, const struct eui64 *id);

     int
     eui64_hostton(const char *hostname, struct	eui64 *id);

DESCRIPTION
     These functions operate on	IEEE EUI-64s using an eui64 structure, which
     is	defined	in the header file <sys/eui64.h>:

	   /*
	    * The number of bytes in an	EUI-64.
	    */
	   #define EUI64_LEN		   8

	   /*
	    * Structure	of an IEEE EUI-64.
	    */
	   struct  eui64 {
		   u_char octet[EUI64_LEN];
	   };

     The eui64_aton() function converts	an ASCII representation	of an EUI-64
     into an eui64 structure.  Likewise, eui64_ntoa() converts an EUI-64 spec-
     ified as an eui64 structure into an ASCII string.

     The eui64_ntohost() and eui64_hostton() functions map EUI-64s to their
     corresponding hostnames as	specified in the /etc/eui64 database.  The
     eui64_ntohost() function converts from EUI-64 to hostname,	and
     eui64_hostton() converts from hostname to EUI-64.

RETURN VALUES
     On	success, eui64_ntoa() returns a	pointer	to a string containing an
     ASCII representation of an	EUI-64.	 If it is unable to convert the	sup-
     plied eui64 structure, it returns a NULL pointer.	Likewise, eui64_aton()
     returns a pointer to an eui64 structure on	success	and a NULL pointer on
     failure.

     The eui64_ntohost() and eui64_hostton() functions both return zero	on
     success or	non-zero if they were unable to	find a match in	the /etc/eui64
     database.

NOTES
     The user must insure that the hostname strings passed to the
     eui64_ntohost() and eui64_hostton() functions are large enough to contain
     the returned hostnames.

NIS INTERACTION
     If	the /etc/eui64 contains	a line with a single `+' in it,	the
     eui64_ntohost() and eui64_hostton() functions will	attempt	to consult the
     NIS eui64.byname and eui64.byid maps in addition to the data in the
     /etc/eui64	file.

SEE ALSO
     firewire(4), eui64(5), yp(8)

BUGS
     The eui64_aton() and eui64_ntoa() functions returns values	that are
     stored in static memory areas which may be	overwritten the	next time they
     are called.

HISTORY
     These functions first appears in FreeBSD 5.3.  They are derived from the
     ethers(3) family of functions.

FreeBSD	9.2			 March 4, 2004			   FreeBSD 9.2

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | NOTES | NIS INTERACTION | SEE ALSO | BUGS | HISTORY

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