platform_system_sepolicy/public/wpantund.te
Nick Kralevich 5e37271df8 Introduce system_file_type
system_file_type is a new attribute used to identify files which exist
on the /system partition. It's useful for allow rules in init, which are
based off of a blacklist of writable files. Additionally, it's useful
for constructing neverallow rules to prevent regressions.

Additionally, add commented out tests which enforce that all files on
the /system partition have the system_file_type attribute. These tests
will be uncommented in a future change after all the device-specific
policies are cleaned up.

Test: Device boots and no obvious problems.
Change-Id: Id9bae6625f042594c8eba74ca712abb09702c1e5
2018-09-27 12:52:09 -07:00

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type wpantund, domain;
type wpantund_exec, system_file_type, exec_type, file_type;
hal_client_domain(wpantund, hal_lowpan)
net_domain(wpantund)
binder_use(wpantund)
binder_call(wpantund, system_server)
# wpantund needs to be able to check in with the lowpan_service
allow wpantund lowpan_service:service_manager find;
# Allow wpantund to call any callbacks that have been registered with it.
# Generally, only privileged apps are able to register callbacks with
# wpantund, so we are limiting the scope for callbacks to only privileged
# apps. We also add shell to allow the command-line utility `lowpanctl`
# to work properly from `adb shell`.
allow wpantund {priv_app shell}:binder call;
# create sockets to set interfaces up and down, add multicast groups, etc.
allow wpantund self:udp_socket create_socket_perms;
# setting interface state up/down and changing MTU are privileged ioctls
allowxperm wpantund self:udp_socket ioctl { SIOCSIFFLAGS SIOCSIFMTU };
# Allow us to bring up a TUN network interface.
allow wpantund tun_device:chr_file rw_file_perms;
allow wpantund self:global_capability_class_set { net_admin net_raw };
allow wpantund self:tun_socket create;