iso_addr(3) [netbsd man page]

ISO_ADDR(3)						   BSD Library Functions Manual 					       ISO_ADDR(3)

NAME

     iso_addr, iso_ntoa -- elementary network address conversion routines for Open System Interconnection

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <sys/types.h>
     #include <netiso/iso.h>

     struct iso_addr *
     iso_addr(const char *cp);

     char *
     iso_ntoa(struct iso_addr *isoa);

DESCRIPTION

     The routine iso_addr() interprets character strings representing OSI addresses, returning binary information suitable for use in system
     calls.  The routine iso_ntoa() takes OSI addresses and returns ASCII strings representing NSAPs (network service access points) in a notation
     inverse to that accepted by iso_addr().

     Unfortunately, no universal standard exists for representing OSI network addresses.

     The format employed by iso_addr() is a sequence of hexadecimal ``digits'' (optionally separated by periods), of the form:

	   <hex digits>.<hex digits>.<hex digits>

     Each pair of hexadecimal digits represents a byte with the leading digit indicating the higher-ordered bits.  A period following an even num-
     ber 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.

RETURN VALUES

     iso_ntoa() always returns a null terminated string.  iso_addr() always returns a pointer to a struct iso_addr.  (See BUGS.)

SEE ALSO

     iso(4)

HISTORY

     The iso_addr() and iso_ntoa() functions appeared in 4.3BSD-Reno.

BUGS

     The returned values reside in a static memory area.

     The function iso_addr() should diagnose improperly formed input, and there should be an unambiguous way to recognize this.

BSD
								   June 4, 1993 							       BSD

IPX(3)							   BSD Library Functions Manual 						    IPX(3)

NAME

     ipx_addr, ipx_ntoa -- IPX address conversion routines

LIBRARY

     IPX Address Conversion Support Library (libipx, -lipx)

SYNOPSIS

     #include <sys/types.h>
     #include <netipx/ipx.h>

     struct ipx_addr
     ipx_addr(const char *cp);

     char *
     ipx_ntoa(struct ipx_addr ipx);

DESCRIPTION

     The routine ipx_addr() interprets character strings representing IPX addresses, returning binary information suitable for use in system
     calls.  The routine ipx_ntoa() takes IPX addresses and returns ASCII strings representing the address in a notation in common use:

	   <network number>.<host number>.<port number>

     Trailing zero fields are suppressed, and each number is printed in hexadecimal, in a format suitable for input to ipx_addr().  Any fields
     lacking super-decimal digits will have a trailing 'H' appended.

     An effort has been made to ensure that ipx_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-order bytes.  Next, the field is inspected for hyphens, in
     which case the field is assumed to be a number in decimal notation with hyphens separating the millennia.	Next, the field is assumed to be a
     number: It is interpreted 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 if there is a leading '0' and there are no super-octal digits.  Otherwise, it is converted as a
     decimal number.

RETURN VALUES

     None.  (See BUGS.)

SEE ALSO

     hosts(5), networks(5)

HISTORY

     The precursor ns_addr() and ns_toa() functions appeared in 4.3BSD.

BUGS

     The string returned by ipx_ntoa() resides in a static memory area.  The function ipx_addr() should diagnose improperly formed input, and
     there should be an unambiguous way to recognize this.

BSD
								   June 4, 1993 							       BSD