The Open Group Base Specifications Issue 6
IEEE Std 1003.1, 2004 Edition
Copyright © 2001-2004 The IEEE and The Open Group, All Rights reserved.

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()

CHANGE HISTORY

First released in Issue 6. Derived from the XNS, Issue 5.2 specification.

End of informative text.
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