trusty (7) if.h.7posix.gz

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NAME
       net/if.h - sockets local interfaces


SYNOPSIS
       #include <net/if.h>


DESCRIPTION
       The  <net/if.h>  header  shall  define  the  if_nameindex  structure that includes 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 macro 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.

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

       The following sections are informative.


APPLICATION USAGE
       None.


RATIONALE
       None.


FUTURE DIRECTIONS
       None.


SEE ALSO
       The   System   Interfaces   volume   of   IEEE Std 1003.1-2001,   if_freenameindex(),   if_indextoname(),
       if_nameindex(), if_nametoindex()


       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition,
       Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open  Group  Base
       Specifications Issue 6, Copyright (C) 2001-2003 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 .