NAME

net/if.h - sockets local interfaces

SYNOPSIS

#include <net/if.h>

DESCRIPTION

The <net/if.h> header defines the if_nameindex structure that includes at least the following members:

Member	Type	Value
if_index	unsigned int	numeric index of the interface
if_name	char *	null-terminated name of the interface

The <net/if.h> header defines 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 are declared as functions, and may also be defined as macros:

 

unsigned int    if_nametoindex(const char *ifname);
char           *if_indextoname(unsigned int ifindex, char *ifname);
struct if_nameindex 
               *if_nameindex(void);
void            if_freenameindex
                    (struct if_nameindex *ptr);

SEE ALSO

if_freenameindex(), if_indextoname(), if_nameindex(), if_nametoindex().

CHANGE HISTORY

First released in Issue 5.2.