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NetBSD 6.1.5 - man page for iso_addr (netbsd section 3)

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

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

     Standard C Library (libc, -lc)

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

     struct iso_addr *
     iso_addr(const char *cp);

     char *
     iso_ntoa(struct iso_addr *isoa);

     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 sepa-
     rated 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 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

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


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

     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
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