Add microdroid specific sepolicy
Microdroid will have a separate sepolicy, apart from the core policy.
This is the first step; For now it's a simple copy of system/sepolicy.
For the future work, it will be stripped.
Bug: 189165759
Test: boot microdroid and see selinux enforced
Change-Id: I2fee39f7231560b49c93bd5e8d0feeffada40938
diff --git a/microdroid/sepolicy/system/public/dnsmasq.te b/microdroid/sepolicy/system/public/dnsmasq.te
new file mode 100644
index 0000000..86f1eb1
--- /dev/null
+++ b/microdroid/sepolicy/system/public/dnsmasq.te
@@ -0,0 +1,28 @@
+# DNS, DHCP services
+type dnsmasq, domain;
+type dnsmasq_exec, system_file_type, exec_type, file_type;
+
+net_domain(dnsmasq)
+allowxperm dnsmasq self:udp_socket ioctl priv_sock_ioctls;
+
+# TODO: Run with dhcp group to avoid need for dac_override.
+allow dnsmasq self:global_capability_class_set { dac_override dac_read_search };
+
+allow dnsmasq self:global_capability_class_set { net_admin net_raw net_bind_service setgid setuid };
+
+allow dnsmasq dhcp_data_file:dir w_dir_perms;
+allow dnsmasq dhcp_data_file:file create_file_perms;
+
+# Inherit and use open files from netd.
+allow dnsmasq netd:fd use;
+allow dnsmasq netd:fifo_file { getattr read write };
+# TODO: Investigate whether these inherited sockets should be closed on exec.
+allow dnsmasq netd:netlink_kobject_uevent_socket { read write };
+allow dnsmasq netd:netlink_nflog_socket { read write };
+allow dnsmasq netd:netlink_route_socket { read write };
+allow dnsmasq netd:unix_stream_socket { getattr read write };
+allow dnsmasq netd:unix_dgram_socket { read write };
+allow dnsmasq netd:udp_socket { read write };
+
+# sometimes a network device vanishes and we try to load module netdev-{devicename}
+dontaudit dnsmasq kernel:system module_request;