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.\" Copyright (c) 2004-2005
.\"	Hartmut Brandt.
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.\"	Fraunhofer Institute for Open Communication Systems (FhG Fokus).
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.\" Author: Hartmut Brandt <harti@FreeBSD.org>
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.\" $Begemot: libunimsg/man/uniaddr.3,v 1.6 2005/06/15 11:37:08 brandt_h Exp $
.\"
.Dd June 14, 2005
.Dt UNIADDR 3
.Os
.Sh NAME
.Nm unimsg ,
.Nm uni_str2nsap ,
.Nm uni_nsap2str ,
.Nm uni_prefix2str ,
.Nm uni_e1642nsap ,
.Nm uni_nsap2e164
.Nd "ATM signalling library - address handling"
.Sh LIBRARY
Begemot ATM signalling library
.Pq libunimsg, -lunimsg
.Sh SYNOPSIS
.In netnatm/addr.h
.Ft int
.Fn uni_str2nsap "u_char *nsap" "const char *str"
.Ft void
.Fn uni_nsap2str "char *str" "const u_char *nsap" "int dots"
.Ft void
.Fn uni_prefix2str "char *str" "const u_char *prefix" "u_int len" "int dots"
.Ft int
.Fn uni_e1642nsap "u_char *nsap" "const char *e164"
.Ft int
.Fn uni_nsap2e164 "char *e164" "const u_char *nsap" "int check"
.Sh DESCRIPTION
The UNI message library contains a number of utility functions to handle
NSAP and E.164 addresses.
.Pp
The function
.Fn uni_str2nsap
parses a string and interprets it as an NSAP address.
The string should consist of exact 40 hexadecimal digits
(upper and lower case are allowed) and any
number of dots at any position.
Any other character is illegal.
The resulting NSAP address is written to the buffer pointed to by
.Fa nsap .
This buffer should be at least 20 bytes.
On success the funtion returns 0.
If an parsing error happens -1 is returned.
.Pp
The function
.Fn uni_nsap2str
converts the NSAP address pointed to by
.Fa nsap
into a string.
For some commonly used NSAP formats (those with leading
octets 0x39, 0x45 or 0x47) dots may be inserted to make the address more
readable by passing a non-0 value in
.Fa dots .
The buffer pointed to by
.Fa str
should be large enough to hold the resulting string plus the terminating NUL.
A size of 80 byte is large enough for all cases.
.Pp
The function
.Fn uni_prefix2str
converts an NSAP prefix to a string.
The length of the NSAP prefix in bytes is passed in
.Fa len .
.Li "uni_nsap2str(str, nsap, dots)"
is equivalent to
.Li "uni_prefix2str(str, nsap, 20, dots)" .
.Pp
The function
.Fn uni_e1642nsap
converts an E.164 address given as an ASCII string to an embedded E.164 NSAP
address.
The string pointed to by
.Fa e164
must consist of at least 1 and not more than 15 ASCII digits.
The function returns 0 on success and -1 if the E.164 address was malformed.
.Pp
The function
.Fn uni_nsap2e164
extracts the E.164 address from an embedded E.164 NSAP address.
The argument
.Fa check
specifies whether the NSAP address should be checked for correct syntax.
If
.Fa check
is 0 the last 11 bytes of the address are ignored.
If
.Fa check
is 1 the last 11 bytes except the selector byte must be zero.
If
.Fa check
is 2 the last 11 bytes must be zero.
The function returns 0 on success and -1 when the NSAP address was not an
embedded E.164 NSAP or one of the additional checks failed.
.Sh SEE ALSO
.Xr libngatm 3
.Sh AUTHORS
.An Hartmut Brandt Aq harti@FreeBSD.org