| # What |
| |
| sheep_net is a character virtual device that bridge between BasiliskII and Physical Ethernet card(P) |
| |
| Here is logical diagram: |
| |
| Guest Mac OS in emulation (G) <==> Basilisk II (B) <==> /dev/sheep_net (S) <==> Physical Ethernet card on host (P) |
| |
| sheep_net module masquerade and de-masquerade MAC address on Ethernet frame so that Guest OS and host share the same MAC address with different IP. |
| |
| See details in [IP aliasing](https://en.wikipedia.org/wiki/IP_aliasing) |
| |
| # How |
| ## How it works |
| |
| Sample Setting: |
| |
| Guest Mac OS IP: 192.168.2.2, Fake MAC address: 84:38:35:5e:c5:5b |
| |
| Host OS Physical Ethernet car IP: 192.168.2.3, physical MAC address: 84:38:35:5e:c5:5a |
| |
| From outside, we see 192.168.2.2 and 192.168.2.3 share the same physical MAC address: 84:38:35:5e:c5:5a |
| |
| From insides, sheep_net module masquerade and de-masquerade MAC address of Ethernet packet between Basilisk and |
| |
| ``` |
| B ==> S ==> P: de-masquerade MAC, convert Fake to Physical |
| B <== S <== P: masquerade MAC, convert Physical to Fake |
| ``` |
| |
| ## How to compile |
| ``` |
| cd Linux/NetDriver |
| make |
| //create sheep_net device node |
| sudo make dev |
| sudo chown [user account] /dev/sheep_net |
| sudo make install |
| sudo modprobe sheep_net |
| ``` |
| |
| ## How to use |
| 1. Disable IP forwarding on host (Recommended: By disabling it, guest OS won't receive duplicate IP packet from host again.) |
| 2. Disable firewall on host (Recommended: host may send ICMP host unreachable to gateway. Or you can disable ICMP sending from host by changing iptables.) |
| 3. sudo modprobe sheep_net |
| 4. sudo chown [user account] /dev/sheep_net |
| 5. Launch BasiliskII, choose your physical Ethernet card interface in network tab |
