const _RTAX_NETMASK = 2
const _RTAX_IFA = 5
const _RTAX_MAX = 8

func getIfList() ([]byte, error) {
	needed, err := syscall.Getkerninfo(_KINFO_RT_IFLIST, 0, 0, 0)
	if err != nil {
		return nil, err
	}
	tab := make([]byte, needed)
	_, err = syscall.Getkerninfo(_KINFO_RT_IFLIST, uintptr(unsafe.Pointer(&tab[0])), uintptr(unsafe.Pointer(&needed)), 0)
	if err != nil {
		return nil, err
	}
	return tab[:needed], nil

}

/*
 * Socket
 */
//sys	bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
//sys	connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
//sys   Getkerninfo(op int32, where uintptr, size uintptr, arg int64) (i int32, err error)
//sys	getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)
//sys	Listen(s int, backlog int) (err error)

//go:cgo_import_dynamic libc_fsync_range fsync_range "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_bind bind "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_connect connect "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_Getkerninfo getkerninfo "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_getsockopt getsockopt "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_Listen listen "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_setsockopt setsockopt "libc.a/shr_64.o"