diff options
Diffstat (limited to 'pkgs/os-specific/linux/spectrum/testhost/default.nix')
| -rw-r--r-- | pkgs/os-specific/linux/spectrum/testhost/default.nix | 25 |
1 files changed, 11 insertions, 14 deletions
diff --git a/pkgs/os-specific/linux/spectrum/testhost/default.nix b/pkgs/os-specific/linux/spectrum/testhost/default.nix index 21c585f1490..de62f0add67 100644 --- a/pkgs/os-specific/linux/spectrum/testhost/default.nix +++ b/pkgs/os-specific/linux/spectrum/testhost/default.nix @@ -45,23 +45,20 @@ let if { ip link set br0 up } # Calculate the MACs for our TAP and the router's TAP. - backtick -in router_nic_dec { - expr ${toString sys-vms.app.vmID} * 2 + 64 * 256 * 256 - } - backtick -in client_nic_dec { - expr ${toString sys-vms.app.vmID} * 2 + 64 * 256 * 256 + 1 - } - multisubstitute { - importas -iu router_nic_dec router_nic_dec - importas -iu client_nic_dec client_nic_dec - } + # MAC address format, by octet: + # + # 0-3 Static OUI for Spectrum + # 4 Most significant bit is used to differentiate + # routers from clients. Other bits are reserved. + # 5-6 Last two octets of client's IP (in 100.64.0.0/16). + # backtick -i router_mac { - pipeline { printf %x $router_nic_dec } - sed s/^\\(..\\)\\(..\\)\\(..\\)$/0A:B3:EC:\\1:\\2:\\3/ + pipeline { printf %.4x ${toString sys-vms.app.vmID} } + sed s/^\\(..\\)\\(..\\)$/0A:B3:EC:80:\\1:\\2/ } backtick -i client_mac { - pipeline { printf %x $client_nic_dec } - sed s/^\\(..\\)\\(..\\)\\(..\\)$/0A:B3:EC:\\1:\\2:\\3/ + pipeline { printf %.4x ${toString sys-vms.app.vmID} } + sed s/^\\(..\\)\\(..\\)$/0A:B3:EC:00:\\1:\\2/ } multisubstitute { importas -iu router_mac router_mac |