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+NAME="NET-COMMON-TCPIP-MANPAGES-ISO-ADDR">iso_addr</H1
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+><TD
+><PRE
+CLASS="SCREEN"
+>ISO_ADDR(3)             System Library Functions Manual            ISO_ADDR(3)
+
+NAME
+     iso_addr, iso_ntoa - network address conversion routines for Open System
+     Interconnection
+
+SYNOPSIS
+     #include &lt;sys/types.h&#62;
+     #include &lt;netiso/iso.h&#62;
+
+     struct iso_addr *
+     iso_addr(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 rep-
+     resenting 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:
+
+           &lt;hex digits&#62;.&lt;hex digits&#62;.&lt;hex digits&#62;
+
+     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 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
+    </PRE
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