Il 19/05/2013 14:58, Paolo Bonzini ha scritto: > Is this CAN device just an Ethernet device? QEMU does not support other > link-level protocols. Adding them would be possible and interesting, > however it would add a bit to the complexity. > > Both would be the same. In the first case, you'd probably use "-netdev > socket" to share a virtual network between two virtual machines. In the > second, you would use something like "-netdev tap" (again assuming it's > just an Ethernet device).
Ok, learnt a bit more... You could probably implement this in two ways: 1) "-netdev socket" would probably work as a CAN->UDP gateway; 2) connecting to a virtual CAN interface in the host, created using SocketCAN (similar to "-netdev tap", e.g. "-netdev cantap"). In the first case, it would probably be useful to write the matching UDP->CAN gateway program. In any case, you have to implement both the backend and the actual device. Paolo
