_init
_init(); //Initialization common to both constructors
_init(); //As above
void _init(void); //initialization common to all constructors
_init();
void _init();
vnet_##name##_init(const void *unused) \
VNET_SYSINIT(vnet_ ## name ## _init, SI_SUB_PROTO_IFATTACHDOMAIN, \
SI_ORDER_ANY, vnet_ ## name ## _init, NULL)