android_system_sepolicy/public/clatd.te

# 464xlat daemon
type clatd, domain, domain_deprecated;
type clatd_exec, exec_type, file_type;

net_domain(clatd)

r_dir_file(clatd, proc_net)

# Access objects inherited from netd.
allow clatd netd:fd use;
allow clatd netd:fifo_file { read write };
# TODO: Check whether some or all of these sockets should be close-on-exec.
allow clatd netd:netlink_kobject_uevent_socket { read write };
allow clatd netd:netlink_nflog_socket { read write };
allow clatd netd:netlink_route_socket { read write };
allow clatd netd:udp_socket { read write };
allow clatd netd:unix_stream_socket { read write };
allow clatd netd:unix_dgram_socket { read write };

allow clatd self:capability { net_admin net_raw setuid setgid };

# clatd calls mmap(MAP_LOCKED) with a 1M buffer. MAP_LOCKED first checks
# capable(CAP_IPC_LOCK), and then checks to see the requested amount is
# under RLIMIT_MEMLOCK. If the latter check succeeds clatd won't have
# needed CAP_IPC_LOCK. But this is not guaranteed to succeed on all devices
# so we permit any requests we see from clatd asking for this capability.
# See https://android-review.googlesource.com/127940 and
# https://b.corp.google.com/issues/21736319
allow clatd self:capability ipc_lock;

allow clatd self:netlink_route_socket nlmsg_write;
allow clatd self:{ packet_socket rawip_socket tun_socket } create_socket_perms_no_ioctl;
allow clatd tun_device:chr_file rw_file_perms;