203 lines
5.0 KiB
Groff
203 lines
5.0 KiB
Groff
.\" Copyright (c) 1995
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.\" Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by Bill Paul.
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.\" 4. Neither the name of the author nor the names of any co-contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd March 4 2004
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.Dt EUI64 3
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.Os
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.Sh NAME
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.Nm eui64 ,
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.\" .Nm eui64_line ,
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.Nm eui64_aton ,
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.Nm eui64_ntoa ,
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.Nm eui64_ntohost ,
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.Nm eui64_hostton
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.Nd IEEE EUI-64 conversion and lookup routines
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In sys/types.h
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.In sys/eui64.h
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.\" .Ft int
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.\" .Fn eui64_line "const char *l" "struct eui64 *e" "char *hostname" "size_t len"
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.Ft int
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.Fn eui64_aton "const char *a" "struct eui64 *e"
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.Ft int
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.Fn eui64_ntoa "const struct eui64 *id" "char *a" "size_t len"
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.Ft int
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.Fn eui64_ntohost "char *hostname" "size_t len" "const struct eui64 *id"
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.Ft int
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.Fn eui64_hostton "const char *hostname" "struct eui64 *id"
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.Sh DESCRIPTION
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These functions operate on IEEE EUI-64s using an
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.Vt eui64
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structure, which is defined in the header file
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.In sys/eui64.h :
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.Bd -literal -offset indent
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/*
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* The number of bytes in an EUI-64.
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*/
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#define EUI64_LEN 8
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/*
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* Structure of an IEEE EUI-64.
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*/
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struct eui64 {
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u_char octet[EUI64_LEN];
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};
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.Ed
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.\" .Pp
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.\" The function
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.\" .Fn eui64_line
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.\" scans
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.\" .Fa l ,
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.\" an
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.\" .Tn ASCII
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.\" string in
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.\" .Xr eui64 5
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.\" format and sets
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.\" .Fa e
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.\" to the EUI-64 specified in the string and
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.\" .Fa h
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.\" to the hostname.
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.\" This function is used to parse lines from
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.\" .Pa /etc/eui64
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.\" into their component parts.
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.Pp
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The
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.Fn eui64_aton
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function converts an
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.Tn ASCII
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representation of an EUI-64 into an
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.Vt eui64
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structure.
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Likewise,
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.Fn eui64_ntoa
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converts an EUI-64 specified as an
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.Vt eui64
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structure into an
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.Tn ASCII
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string.
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.Pp
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The
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.Fn eui64_ntohost
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and
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.Fn eui64_hostton
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functions map EUI-64s to their corresponding hostnames
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as specified in the
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.Pa /etc/eui64
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database.
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The
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.Fn eui64_ntohost
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function
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converts from EUI-64 to hostname, and
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.Fn eui64_hostton
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converts from hostname to EUI-64.
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.Sh RETURN VALUES
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.\" The
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.\" .Fn eui64_line
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.\" function
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.\" returns zero on success and non-zero if it was unable to parse
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.\" any part of the supplied line
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.\" .Fa l .
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.\" It returns the extracted EUI-64 in the supplied
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.\" .Vt eui64
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.\" structure
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.\" .Fa e
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.\" and the hostname in the supplied string
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.\" .Fa h .
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.\" .Pp
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On success,
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.Fn eui64_ntoa
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returns a pointer to a string containing an
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.Tn ASCII
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representation of an EUI-64.
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If it is unable to convert
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the supplied
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.Vt eui64
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structure, it returns a
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.Dv NULL
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pointer.
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Likewise,
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.Fn eui64_aton
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returns a pointer to an
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.Vt eui64
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structure on success and a
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.Dv NULL
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pointer on failure.
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.Pp
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The
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.Fn eui64_ntohost
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and
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.Fn eui64_hostton
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functions both return zero on success or non-zero if they were
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unable to find a match in the
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.Pa /etc/eui64
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database.
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.Sh NOTES
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The user must insure that the hostname strings passed to the
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.\" .Fn eui64_line ,
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.Fn eui64_ntohost
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and
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.Fn eui64_hostton
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functions are large enough to contain the returned hostnames.
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.Sh NIS INTERACTION
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If the
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.Pa /etc/eui64
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contains a line with a single + in it, the
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.Fn eui64_ntohost
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and
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.Fn eui64_hostton
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functions will attempt to consult the NIS
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.Pa eui64.byname
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and
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.Pa eui64.byid
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maps in addition to the data in the
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.Pa /etc/eui64
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file.
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.Sh SEE ALSO
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.Xr firewire 4 ,
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.Xr eui64 5 ,
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.Xr yp 8
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.Sh BUGS
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The
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.Fn eui64_aton
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and
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.Fn eui64_ntoa
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functions returns values that are stored in static memory areas
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which may be overwritten the next time they are called.
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.Sh HISTORY
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These functions first appears in
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.Fx 5.3 .
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They are derived from the
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.Xr ethers 3
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family of functions.
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