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NAME="NET-COMMON-TCPIP-MANPAGES-ISO-ADDR">iso_addr</H1
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NAME="NET-COMMON-TCPIP-MANPAGES-ISO-ADDR">iso_addr</H1
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>ISO_ADDR(3) System Library Functions Manual ISO_ADDR(3)
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>ISO_ADDR(3) System Library Functions Manual ISO_ADDR(3)
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NAME
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NAME
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iso_addr, iso_ntoa - network address conversion routines for Open System
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iso_addr, iso_ntoa - network address conversion routines for Open System
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Interconnection
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Interconnection
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SYNOPSIS
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SYNOPSIS
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#include <sys/types.h>
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#include <sys/types.h>
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#include <netiso/iso.h>
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#include <netiso/iso.h>
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struct iso_addr *
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struct iso_addr *
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iso_addr(char *cp);
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iso_addr(char *cp);
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char *
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char *
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iso_ntoa(struct iso_addr *isoa);
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iso_ntoa(struct iso_addr *isoa);
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DESCRIPTION
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DESCRIPTION
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The routine iso_addr() interprets character strings representing OSI
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The routine iso_addr() interprets character strings representing OSI
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addresses, returning binary information suitable for use in system calls.
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addresses, returning binary information suitable for use in system calls.
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The routine iso_ntoa() takes OSI addresses and returns ASCII strings rep-
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The routine iso_ntoa() takes OSI addresses and returns ASCII strings rep-
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resenting NSAPs (network service access points) in a notation inverse to
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resenting NSAPs (network service access points) in a notation inverse to
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that accepted by iso_addr().
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that accepted by iso_addr().
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Unfortunately, no universal standard exists for representing OSI network
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Unfortunately, no universal standard exists for representing OSI network
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addresses.
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addresses.
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The format employed by iso_addr() is a sequence of hexadecimal ``digits''
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The format employed by iso_addr() is a sequence of hexadecimal ``digits''
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(optionally separated by periods), of the form:
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(optionally separated by periods), of the form:
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<hex digits>.<hex digits>.<hex digits>
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<hex digits>.<hex digits>.<hex digits>
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Each pair of hexadecimal digits represents a byte with the leading digit
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Each pair of hexadecimal digits represents a byte with the leading digit
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indicating the higher-ordered bits. A period following an even number of
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indicating the higher-ordered bits. A period following an even number of
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bytes has no effect (but may be used to increase legibility). A period
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bytes has no effect (but may be used to increase legibility). A period
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following an odd number of bytes has the effect of causing the byte of
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following an odd number of bytes has the effect of causing the byte of
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address being translated to have its higher order bits filled with zeros.
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address being translated to have its higher order bits filled with zeros.
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RETURN VALUES
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RETURN VALUES
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iso_ntoa() always returns a null terminated string. iso_addr() always
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iso_ntoa() always returns a null terminated string. iso_addr() always
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returns a pointer to a struct iso_addr. (See BUGS.)
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returns a pointer to a struct iso_addr. (See BUGS.)
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SEE ALSO
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SEE ALSO
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iso(4)
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iso(4)
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HISTORY
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HISTORY
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The iso_addr() and iso_ntoa() functions appeared in 4.3BSD-Reno.
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The iso_addr() and iso_ntoa() functions appeared in 4.3BSD-Reno.
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BUGS
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BUGS
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The returned values reside in a static memory area.
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The returned values reside in a static memory area.
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The function iso_addr() should diagnose improperly formed input, and
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The function iso_addr() should diagnose improperly formed input, and
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there should be an unambiguous way to recognize this.
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there should be an unambiguous way to recognize this.
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BSD June 4, 1993 BSD
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BSD June 4, 1993 BSD
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