iface_info(void)
static int iface_info(void)
iface_info(void){  if ((skfd = sockets_open(0)) < 0) {    perror("socket");    exit(1);  }  printf(_("Kernel Interface table\n"));  printf(_("Iface     MTU Met  RX-OK RX-ERR RX-DRP RX-OVR  TX-OK TX-ERR TX-DRP TX-OVR Flags\n"));    if (for_all_interfaces(do_if_print, &flag_all) < 0) {	  perror(_("missing interface information")); 	  exit(1);  }  close(skfd);  skfd = -1;    return 0;}