net_if.h(0p) — Linux manual page

net_if.h(0P)            POSIX Programmer's Manual           net_if.h(0P)

PROLOG

       This manual page is part of the POSIX Programmer's Manual.  The
       Linux implementation of this interface may differ (consult the
       corresponding Linux manual page for details of Linux behavior),
       or the interface may not be implemented on Linux.

NAME

       net/if.h — sockets local interfaces

SYNOPSIS

       #include <net/if.h>

DESCRIPTION

       The <net/if.h> header shall define the if_nameindex structure,
       which shall include at least the following members:

           unsigned  if_index  Numeric index of the interface.
           char     *if_name   Null-terminated name of the interface.

       The <net/if.h> header shall define the following symbolic
       constant for the length of a buffer containing an interface name
       (including the terminating NULL character):

       IF_NAMESIZE Interface name length.

       The following shall be declared as functions and may also be
       defined as macros. Function prototypes shall be provided.

           void                  if_freenameindex(struct if_nameindex *);
           char                 *if_indextoname(unsigned, char *);
           struct if_nameindex  *if_nameindex(void);
           unsigned              if_nametoindex(const char *);

       The following sections are informative.

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       The System Interfaces volume of POSIX.1‐2017,
       if_freenameindex(3p), if_indextoname(3p), if_nameindex(3p),
       if_nametoindex(3p)

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic
       form from IEEE Std 1003.1-2017, Standard for Information
       Technology -- Portable Operating System Interface (POSIX), The
       Open Group Base Specifications Issue 7, 2018 Edition, Copyright
       (C) 2018 by the Institute of Electrical and Electronics
       Engineers, Inc and The Open Group.  In the event of any
       discrepancy between this version and the original IEEE and The
       Open Group Standard, the original IEEE and The Open Group
       Standard is the referee document. The original Standard can be
       obtained online at http://www.opengroup.org/unix/online.html .

       Any typographical or formatting errors that appear in this page
       are most likely to have been introduced during the conversion of
       the source files to man page format. To report such errors, see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group               2017                      net_if.h(0P)

Pages that refer to this page: if_freenameindex(3p), if_indextoname(3p), if_nameindex(3p), if_nametoindex(3p)

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