NAME

if_nametoindex - map an interface name to its corresponding index

SYNOPSIS

#include <net/if.h>

unsigned int if_nametoindex(const char *ifname);

DESCRIPTION

Returns the interface index corresponding to name ifname.

RETURN VALUE

The corresponding index if ifname is the name of an interface; zero otherwise.

ERRORS

[EFAULT]

The buffer pointed to by ifname can not be accessed.

SEE ALSO

getsockopt(), if_freenameindex(), if_indextoname(), if_nameindex(), setsockopt(), <net/if.h>.

CHANGE HISTORY