diff options
Diffstat (limited to 'eth-multiplexer/device_impl.c')
| -rw-r--r-- | eth-multiplexer/device_impl.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/eth-multiplexer/device_impl.c b/eth-multiplexer/device_impl.c index 18ebf07e..f23738a1 100644 --- a/eth-multiplexer/device_impl.c +++ b/eth-multiplexer/device_impl.c @@ -108,6 +108,9 @@ ds_device_write (struct vether_device *vdev, mach_port_t reply_port, if (vdev == NULL) return D_NO_SUCH_DEVICE; + if ((vdev->if_flags & IFF_UP) == 0) + return D_DEVICE_DOWN; + /* The packet is forwarded to all virtual interfaces and * the interface which the multiplexer connects to. */ broadcast_pack (data, datalen, vdev); |