NAME

       socket_getifidx - get interface number

SYNTAX

       #include <socket.h>

       int socket_getifidx(const char* ifname);

DESCRIPTION

       socket_getifidx  returns  the interface number for a symbolic network interface name (like
       "eth0" on Linux, for example).

       The interface number can be  used  as  scope_id  for  IPv6  communications  on  link-local
       addresses.

       If something goes wrong, socket_getifidx returns -1, setting errno appropriately.

SEE ALSO

       socket_getifname(3), socket_connect6(3)

                                                                               socket_getifidx(3)