platform_system_sepolicy/private/netutils_wrapper.te

typeattribute netutils_wrapper coredomain;
typeattribute netutils_wrapper bpfdomain;

r_dir_file(netutils_wrapper, system_file);

# For netutils (ip, iptables, tc)
allow netutils_wrapper self:global_capability_class_set net_raw;

allow netutils_wrapper system_file:file { execute execute_no_trans };
allow netutils_wrapper proc_net_type:file { open read getattr };
allow netutils_wrapper self:rawip_socket create_socket_perms;
allow netutils_wrapper self:udp_socket create_socket_perms;
allow netutils_wrapper self:global_capability_class_set net_admin;
# ip utils need everything but ioctl
allow netutils_wrapper self:netlink_route_socket ~ioctl;
allow netutils_wrapper self:netlink_xfrm_socket ~ioctl;

# For netutils (ndc) to be able to talk to netd
allow netutils_wrapper netd_service:service_manager find;
allow netutils_wrapper dnsresolver_service:service_manager find;
allow netutils_wrapper mdns_service:service_manager find;
binder_use(netutils_wrapper);
binder_call(netutils_wrapper, netd);

# For vendor code that update the iptables rules at runtime. They need to reload
# the whole chain including the xt_bpf rules. They need to access to the pinned
# program when reloading the rule.
allow netutils_wrapper { fs_bpf fs_bpf_netd_shared }:dir search;
allow netutils_wrapper { fs_bpf fs_bpf_netd_shared }:file { getattr read };
allow netutils_wrapper { fs_bpf                    }:file write;
allow netutils_wrapper bpfloader:bpf prog_run;

# For /data/misc/net access to ndc and ip
r_dir_file(netutils_wrapper, net_data_file)

domain_auto_trans({
    domain
    -coredomain
    -appdomain
}, netutils_wrapper_exec, netutils_wrapper)

# suppress spurious denials
dontaudit netutils_wrapper self:global_capability_class_set sys_resource;
dontaudit netutils_wrapper sysfs_type:file read;

# netutils wrapper may only use the following capabilities.
neverallow netutils_wrapper self:global_capability_class_set ~{ net_admin net_raw };