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NS(3) OpenBSD Programmer's Manual NS(3)
ns_addr, ns_ntoa - Xerox NS(tm) address conversion routines
ns_ntoa(struct ns_addr ns);
The routine ns_addr() interprets character strings representing XNS ad-
dresses, returning binary information suitable for use in system calls.
The routine ns_ntoa() takes XNS addresses and returns ASCII strings rep-
resenting the address in a notation in common use in the Xerox Develop-
<network number>.<host number>.<port number>
Trailing zero fields are suppressed, and each number is printed in hex-
adecimal, in a format suitable for input to ns_addr(). Any fields lack-
ing super-decimal digits will have a trailing `H' appended.
Unfortunately, no universal standard exists for representing XNS address-
es. An effort has been made to insure that ns_addr() be compatible with
most formats in common use. It will first separate an address into 1 to
3 fields using a single delimiter chosen from period (`.'), colon (`:'),
or pound-sign `#'. Each field is then examined for byte separators (colon
or period). If there are byte separators, each subfield separated is
taken to be a small hexadecimal number, and the entirety is taken as a
network-byte-ordered quantity to be zero extended in the high-network-or-
der bytes. Next, the field is inspected for hyphens, in which case the
field is assumed to be a number in decimal notation with hyphens separat-
ing the millenia. Next, the field is assumed to be a number: It is in-
terpreted as hexadecimal if there is a leading `0x' (as in C), a trailing
`H' (as in Mesa), or there are any super-decimal digits present. It is
interpreted as octal is there is a leading `0' and there are no super-oc-
tal digits. Otherwise, it is converted as a decimal number.
None. (See BUGS.)
The ns_addr() and ns_toa() functions appeared in 4.3BSD.
The string returned by ns_ntoa() resides in a static memory area. The
function ns_addr() should diagnose improperly formed input, and there
should be an unambiguous way to recognize this.
OpenBSD 2.6 June 4, 1993 1
Source: OpenBSD 2.6 man pages. Copyright: Portions are copyrighted by BERKELEY
SOFTWARE DESIGN, INC., The Regents of the University of California, Massachusetts
Institute of Technology, Free Software Foundation, FreeBSD Inc., and others.
(Corrections, notes, and links courtesy of RocketAware.com)
FreeBSD Sources for ns(3) functions
OpenBSD sources for ns(3)
Up to: Host, service name, and address operations - Methods and functions for doing address, host, user, and service name lookups (DNS). also Internet Assigned Numbers
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