}

	// Call ConnectEx API.
	if err := fd.pfd.ConnectEx(ra); err != nil {
		select {
		case <-ctx.Done():
			return nil, mapErr(ctx.Err())
		default:
			if _, ok := err.(syscall.Errno); ok {
				err = os.NewSyscallError("connectex", err)
			}
			return nil, err
		}
	}
	// Refresh socket properties.

		return so.Err
	}
	sw.stats.getLocked(so.Cookie).Connected++
	return nil
}

// ConnectEx wraps [syscall.ConnectEx].
func (sw *Switch) ConnectEx(s syscall.Handle, sa syscall.Sockaddr, b *byte, n uint32, nwr *uint32, o *syscall.Overlapped) (err error) {
	so := sw.sockso(s)
	if so == nil {
		return syscall.ConnectEx(s, sa, b, n, nwr, o)
	}
	sw.fmu.RLock()
	f, _ := sw.fltab[FilterConnect]
	sw.fmu.RUnlock()

// ConnectExFunc is used to hook the ConnectEx call.

	origListen      = listenFunc
	origAccept      = poll.AcceptFunc
)

func installTestHooks() {
	wsaSocketFunc = sw.WSASocket
	poll.CloseFunc = sw.Closesocket
	connectFunc = sw.Connect
	poll.ConnectExFunc = sw.ConnectEx
	listenFunc = sw.Listen
	poll.AcceptFunc = sw.AcceptEx
}

func uninstallTestHooks() {
	wsaSocketFunc = origWSASocket
	poll.CloseFunc = origClosesocket
	connectFunc = origConnect

	}
	return s
}

// A FilterType represents a filter type.
type FilterType int

const (
	FilterSocket        FilterType = iota // for Socket
	FilterConnect                         // for Connect or ConnectEx
	FilterListen                          // for Listen
	FilterAccept                          // for Accept, Accept4 or AcceptEx
	FilterGetsockoptInt                   // for GetsockoptInt