NAME

if_nametoindex − Map an interface name to an interface index

SYNOPSIS

#include <net/if.h>
unsigned int if_nametoindex(
        const char ∗ifname );

LIBRARY

Standard C Library (libc)

PARAMETERS

ifname
Points to a buffer that contains the interface name.

DESCRIPTION

The if_nametoindex() function maps an interface name to its corresponding interface index number. 

RETURN VALUES

Upon successful conversion, the if_nametoindex() function returns an interface index number. If the interface does not exist, it returns zero (0). 

SEE ALSO

Functions: if_freenameindex(3), if_indextoname(3), if_nameindex(3).