if_nametoindex(3)if_nametoindex(3)NAMEif_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
Points to a buffer that contains the interface name.
DESCRIPTION
The if_nametoindex() function maps an interface name to its correspondā
ing 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).
if_nametoindex(3)