package net

import (
	"internal/syscall/windows"
	"os"
	"syscall"
	"unsafe"
)

// adapterAddresses returns a list of IP adapter and address
// structures. The structure contains an IP adapter and flattened
// multiple IP addresses including unicast, anycast and multicast
// addresses.
func adapterAddresses() ([]*windows.IpAdapterAddresses, error) {
	var b []byte
	l := uint32(15000) // recommended initial size
	for {

	conf = &dnsConfig{
		ndots:    1,
		timeout:  5 * time.Second,
		attempts: 2,
	}
	defer func() {
		if len(conf.servers) == 0 {
			conf.servers = defaultNS
		}
	}()
	aas, err := adapterAddresses()
	if err != nil {
		return
	}

	for _, aa := range aas {
		// Only take interfaces whose OperStatus is IfOperStatusUp(0x01) into DNS configs.
		if aa.OperStatus != windows.IfOperStatusUp {
			continue

	}
	return
}

func GetAdaptersAddresses(family uint32, flags uint32, reserved uintptr, adapterAddresses *IpAdapterAddresses, sizePointer *uint32) (errcode error) {
	r0, _, _ := syscall.Syscall6(procGetAdaptersAddresses.Addr(), 5, uintptr(family), uintptr(flags), uintptr(reserved), uintptr(unsafe.Pointer(adapterAddresses)), uintptr(unsafe.Pointer(sizePointer)), 0)
	if r0 != 0 {
		errcode = syscall.Errno(r0)
	}
	return
}

	IfOperStatusUnknown        = 4
	IfOperStatusDormant        = 5
	IfOperStatusNotPresent     = 6
	IfOperStatusLowerLayerDown = 7
)

//sys	GetAdaptersAddresses(family uint32, flags uint32, reserved uintptr, adapterAddresses *IpAdapterAddresses, sizePointer *uint32) (errcode error) = iphlpapi.GetAdaptersAddresses
//sys	GetComputerNameEx(nameformat uint32, buf *uint16, n *uint32) (err error) = GetComputerNameExW

	}
	return
}

func GetAdaptersAddresses(family uint32, flags uint32, reserved uintptr, adapterAddresses *IpAdapterAddresses, sizePointer *uint32) (errcode error) {
	r0, _, _ := syscall.Syscall6(procGetAdaptersAddresses.Addr(), 5, uintptr(family), uintptr(flags), uintptr(reserved), uintptr(unsafe.Pointer(adapterAddresses)), uintptr(unsafe.Pointer(sizePointer)), 0)
	if r0 != 0 {
		errcode = syscall.Errno(r0)
	}
	return

//sys	WSAGetOverlappedResult(h Handle, o *Overlapped, bytes *uint32, wait bool, flags *uint32) (err error) = ws2_32.WSAGetOverlappedResult
//sys	GetAdaptersAddresses(family uint32, flags uint32, reserved uintptr, adapterAddresses *IpAdapterAddresses, sizePointer *uint32) (errcode error) = iphlpapi.GetAdaptersAddresses
//sys	GetACP() (acp uint32) = kernel32.GetACP