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

XSH if_freenameindex(3), if_indextoname(3), if_nameindex(3), if_nametoindex(3)

CHANGE HISTORY

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

Issue 7

This reference page is clarified with respect to macros and symbolic constants.

End of informative text.