private/wfdservice.te

# Copyright (c) 2017, The Linux Foundation. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#     * Redistributions of source code must retain the above copyright
#       notice, this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above
#       copyright notice, this list of conditions and the following
#       disclaimer in the documentation and/or other materials provided
#       with the distribution.
#     * Neither the name of The Linux Foundation nor the names of its
#       contributors may be used to endorse or promote products derived
#       from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
# WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
# ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
# BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
# OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
# IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

typeattribute wfdservice coredomain;

#Allow for transition from init domain to wfdservice
init_daemon_domain(wfdservice)

#Inherit base socket permissions from netd domain
net_domain(wfdservice)

#Allow wfdservice to use Binder IPC
binder_use(wfdservice)

#Allow for interaction with Display HAL
binder_call(wfdservice, surfaceflinger)
binder_call(surfaceflinger, wfdservice)

#Allow apps to interact with wfdservice
binder_call(wfdservice, platform_app)
binder_call(platform_app, wfdservice)
binder_call(wfdservice, system_app)
binder_call(system_app, wfdservice)

#Allow access to Audio Flinger APIs
binder_call(wfdservice, audioserver)

#Allow access to Permission Controller in System Server
binder_call(wfdservice, system_server)

# Mark wfdservice as a Binder service domain
binder_service(wfdservice)

#Allow wfdservice to be registered with service manager
allow wfdservice wfdservice_service:service_manager add;

#Allow access to PCM sound card
allow wfdservice audio_device:chr_file rw_file_perms;
allow wfdservice audio_device:dir r_dir_perms;

#Allow access to /dev/graphics/fb* for screen capture
allow wfdservice graphics_device:chr_file rw_file_perms;

#Allow access to encoder for YUV statistics
allow wfdservice gpu_device:chr_file rw_file_perms;

#Allow access to /dev/video/* devices for encoding/decoding
allow wfdservice video_device:chr_file rw_file_perms;
allow wfdservice video_device:dir r_dir_perms;

#Allow access to tee device for HDCP sessions
allow wfdservice tee_device:chr_file rw_file_perms;

#Allow access to uhid driver for HID event injection
allow wfdservice uhid_device:chr_file rw_file_perms;

#Allow PROT_EXEC for 3rd party library loaded by wfdservice
allow wfdservice self:process execmem;

userdebug_or_eng(`
#Allow access to read mmosal_logmask file in /data partition
  allow wfdservice system_data_file:file r_file_perms;
#Allow access to dump encoder/decoder dumps in /data/misc/media
  allow wfdservice media_data_file:dir w_dir_perms;
  allow wfdservice media_data_file:file create_file_perms;
')

#Allow access to /data/media for dumping
allow wfdservice media_rw_data_file:dir create_dir_perms;
allow wfdservice media_rw_data_file:file create_file_perms;

allow wfdservice self:netlink_kobject_uevent_socket create_socket_perms_no_ioctl;

# Allow access to input_device for touch input detection
allow wfdservice input_device:dir r_dir_perms;
allow wfdservice input_device:chr_file r_file_perms;

# Allow access to mediaserver, surfaceflinger and permissionmanager
# for interaction of wfdservice
allow wfdservice {audioserver_service permission_service surfaceflinger_service wfdservice_service}: service_manager find;

#Allow setting of net_admin capability so that libnl API's can be used
allow wfdservice self:capability net_admin;

#allow binder call to mediacodec from wfdservice
binder_call(wfdservice, mediacodec);

#Allow wfdservice to query interface name of network (p2p etc.)
allow wfdservice self:netlink_socket create_socket_perms_no_ioctl;
allow wfdservice self:netlink_generic_socket create_socket_perms_no_ioctl;

#Allow ion device access
allow wfdservice ion_device:chr_file r_file_perms;

#Allow udp socket ioctl
allow wfdservice self:udp_socket ioctl;

# ioctlcmd=8bff
allowxperm wfdservice self:udp_socket ioctl priv_sock_ioctls;

#Allow access to proc/net/arp
allow wfdservice proc_net:file r_file_perms;