Subversion Repositories openrisc

.\" Copyright (c) 1993

.\"     The Regents of the University of California.  All rights reserved.

.\"

.\" Redistribution and use in source and binary forms, with or without

.\" modification, are permitted provided that the following conditions

.\" are met:

.\" 1. Redistributions of source code must retain the above copyright

.\"    notice, this list of conditions and the following disclaimer.

.\" 2. Redistributions in binary form must reproduce the above copyright

.\"    notice, this list of conditions and the following disclaimer in the

.\"    documentation and/or other materials provided with the distribution.

.\" 3. All advertising materials mentioning features or use of this software

.\"    must display the following acknowledgement:

.\"     This product includes software developed by the University of

.\"     California, Berkeley and its contributors.

.\" 4. Neither the name of the University nor the names of its contributors

.\"    may be used to endorse or promote products derived from this software

.\"    without specific prior written permission.

.\"

.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND

.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE

.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

.\" SUCH DAMAGE.

.\"

.\"     @(#)iso_addr.3  8.1 (Berkeley) 6/4/93

.\"     $Id: iso_addr.3,v 1.2 2001-09-27 12:01:53 chris Exp $

.\"

.Dd June 4, 1993

.Dt ISO_ADDR 3

.Os

.Sh NAME

.Nm iso_addr ,

.Nm iso_ntoa

.Nd "elementary network address conversion routines for Open System Interconnection

.Sh SYNOPSIS

.Fd #include 

.Fd #include 

.Ft struct iso_addr *

.Fn iso_addr "char *cp"

.Ft char *

.Fn iso_ntoa "struct iso_addr *isoa"

.Sh DESCRIPTION

The routine

.Fn iso_addr

interprets character strings representing

.Tn OSI

addresses, returning binary information suitable

for use in system calls.

The routine

.Fn iso_ntoa

takes

.Tn OSI

addresses and returns

.Tn ASCII

strings representing NSAPs (network service

access points) in a

notation inverse to that accepted by

.Fn iso_addr .

.Pp

Unfortunately, no universal standard exists for representing

.Tn OSI

network addresses.

.Pp

The format employed by

.Fn iso_addr

is a sequence of hexadecimal

.Dq digits

(optionally separated by periods),

of the form:

.Bd -filled -offset indent

..

.Ed

.Pp

Each pair of hexadecimal digits represents a byte

with the leading digit indicating the higher-ordered bits.

A period following an even number of bytes has no

effect (but may be used to increase legibility).

A period following an odd number of bytes has the

effect of causing the byte of address being translated

to have its higher order bits filled with zeros.

.Sh RETURN VALUES

.Fn iso_ntoa

always returns a null terminated string.

.Fn iso_addr

always returns a pointer to a struct iso_addr.

(See

.Sx BUGS . )

.Sh SEE ALSO

.Xr iso 4

.Sh HISTORY

The

.Fn iso_addr

and

.Fn iso_ntoa

functions appeared in

.Bx 4.3 Reno .

.Sh BUGS

The returned values

reside in a static memory area.

.Pp

The function

.Fn iso_addr

should diagnose improperly formed input, and there should be an unambiguous

way to recognize this.