|Linux & Unix Commands - Search Man Pages
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)
struct iso_addr *
iso_addr(const char *cp);
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
All times are GMT -4. The time now is 05:08 PM.