ifi.Flags |= FlagBroadcast | FlagMulticast
			case windows.IF_TYPE_PPP, windows.IF_TYPE_TUNNEL:
				ifi.Flags |= FlagPointToPoint | FlagMulticast
			case windows.IF_TYPE_SOFTWARE_LOOPBACK:
				ifi.Flags |= FlagLoopback | FlagMulticast
			case windows.IF_TYPE_ATM:
				ifi.Flags |= FlagBroadcast | FlagPointToPoint | FlagMulticast // assume all services available; LANE, point-to-point and point-to-multipoint

	if err != nil {
		t.Skip(err.Error())
	}
	if len(ifcs) == 0 {
		t.Skip("no network interfaces found")
	}

	var mifc *Interface
	for _, ifc := range ifcs {
		if ifc.Flags&FlagUp|FlagMulticast != FlagUp|FlagMulticast {
			continue
		}
		mifc = &ifc
		break
	}

	if mifc == nil {
		t.Skipf("no multicast interfaces found")
	}

				if !ok {
					ifc.HardwareAddr = ifc.HardwareAddr[:i]
					break
				}
			}
		}

		ifc.Flags = FlagUp | FlagRunning | FlagBroadcast | FlagMulticast
	} else {
		ifc.Flags = FlagUp | FlagRunning | FlagMulticast | FlagLoopback
	}

	return ifc, nil
}

func interfaceCount() (int, error) {
	d, err := os.Open(netdir + "/ipifc")
	if err != nil {
		return -1, err
	}

	}
	if rawFlags&syscall.IFF_LOOPBACK != 0 {
		f |= FlagLoopback
	}
	if rawFlags&syscall.IFF_POINTOPOINT != 0 {
		f |= FlagPointToPoint
	}
	if rawFlags&syscall.IFF_MULTICAST != 0 {
		f |= FlagMulticast
	}
	return f
}

// If the ifi is nil, interfaceAddrTable returns addresses for all
// network interfaces. Otherwise it returns addresses for a specific
// interface.

	}
	if rawFlags&syscall.IFF_LOOPBACK != 0 {
		f |= FlagLoopback
	}
	if rawFlags&syscall.IFF_POINTOPOINT != 0 {
		f |= FlagPointToPoint
	}
	if rawFlags&syscall.IFF_MULTICAST != 0 {
		f |= FlagMulticast
	}
	return f
}

// If the ifi is nil, interfaceAddrTable returns addresses for all
// network interfaces. Otherwise it returns addresses for a specific
// interface.

	Name         string       // e.g., "en0", "lo0", "eth0.100"
	HardwareAddr HardwareAddr // IEEE MAC-48, EUI-48 and EUI-64 form
	Flags        Flags        // e.g., FlagUp, FlagLoopback, FlagMulticast
}

type Flags uint

const (
	FlagUp           Flags = 1 << iota // interface is administratively up
	FlagBroadcast                      // interface supports broadcast access capability

	}
	if rawFlags&syscall.IFF_LOOPBACK != 0 {
		f |= FlagLoopback
	}
	if rawFlags&syscall.IFF_POINTOPOINT != 0 {
		f |= FlagPointToPoint
	}
	if rawFlags&syscall.IFF_MULTICAST != 0 {
		f |= FlagMulticast
	}
	return f
}

// If the ifi is nil, interfaceAddrTable returns addresses for all
// network interfaces. Otherwise it returns addresses for a specific
// interface.

	}
	if rawFlags&syscall.IFF_LOOPBACK != 0 {
		f |= FlagLoopback
	}
	if rawFlags&syscall.IFF_POINTOPOINT != 0 {
		f |= FlagPointToPoint
	}
	if rawFlags&syscall.IFF_MULTICAST != 0 {
		f |= FlagMulticast
	}
	return f
}

// If the ifi is nil, interfaceAddrTable returns addresses for all
// network interfaces. Otherwise it returns addresses for a specific
// interface.

	switch network {
	case "ip", "ip4", "ip6":
	default:
		return nil, errNoAvailableAddress
	}
	if ifi == nil || ifi.Flags&net.FlagUp == 0 || ifi.Flags&net.FlagMulticast == 0 {
		return nil, errNoAvailableAddress
	}
	ip, ok := hasRoutableIP(network, ifi)
	if !ok {
		return nil, errNoAvailableAddress
	}
	return ip, nil
}

`

const (
	flagUp       = net.FlagUp | net.FlagBroadcast | net.FlagMulticast
	flagDown     = net.FlagBroadcast | net.FlagMulticast
	flagLoopback = net.FlagUp | net.FlagLoopback
	flagP2P      = net.FlagUp | net.FlagPointToPoint
)

func makeIntf(index int, name string, flags net.Flags) net.Interface {