# mediatranscoding - daemon for transcoding video and image.
type mediatranscoding, domain;
type mediatranscoding_exec, system_file_type, exec_type, file_type;

binder_use(mediatranscoding)
binder_call(mediatranscoding, binderservicedomain)
binder_service(mediatranscoding)

add_service(mediatranscoding, mediatranscoding_service)

allow mediatranscoding system_server:fd use;
allow mediatranscoding activity_service:service_manager find;
allow mediatranscoding untrusted_app:binder call;

# allow mediatranscoding service read/write permissions for file sources
allow mediatranscoding sdcardfs:file { getattr read write };
allow mediatranscoding media_rw_data_file:file { getattr read write };
allow mediatranscoding apk_data_file:file { getattr read };

# mediatranscoding should never execute any executable without a
# domain transition
neverallow mediatranscoding { file_type fs_type }:file execute_no_trans;

# The goal of the mediaserver split is to place media processing code into
# restrictive sandboxes with limited responsibilities and thus limited
# permissions. Example: Audioserver is only responsible for controlling audio
# hardware and processing audio content. Cameraserver does the same for camera
# hardware/content. Etc.
#
# Media processing code is inherently risky and thus should have limited
# permissions and be isolated from the rest of the system and network.
# Lengthier explanation here:
# https://android-developers.googleblog.com/2016/05/hardening-media-stack.html
neverallow mediatranscoding domain:{ tcp_socket udp_socket rawip_socket } *;