[KA08] Allow system_server call tcp socket ioctl
In order to offload application tcp socket’s keepalive
message, system server must know if application's socket
is idle with no data in send/receive queues. Allow
system_server to use ioctl on all tcp sockets.
Bug: 114151147
Test: -build, flash, boot
Change-Id: I3f5a0e06bc22f8a64ae6180db48df2a31106c511
diff --git a/private/system_server.te b/private/system_server.te
index 98ae7f8..2cf5ea7 100644
--- a/private/system_server.te
+++ b/private/system_server.te
@@ -53,6 +53,12 @@
allowxperm system_server self:udp_socket ioctl priv_sock_ioctls;
bluetooth_domain(system_server)
+# Allow setup of tcp keepalive offload. This gives system_server the permission to
+# call ioctl on app domains' tcp sockets. Additional ioctl commands still need to
+# be granted individually, except for a small set of safe values whitelisted in
+# public/domain.te.
+allow system_server appdomain:tcp_socket ioctl;
+
# These are the capabilities assigned by the zygote to the
# system server.
allow system_server self:global_capability_class_set {