platform_system_sepolicy/private/network_stack.te

# Networking service app
typeattribute network_stack coredomain, mlstrustedsubject;

app_domain(network_stack);
net_domain(network_stack);

allow network_stack self:global_capability_class_set {
    net_admin
    net_bind_service
    net_broadcast
    net_raw
};

# Allow access to net_admin ioctl, DHCP server uses SIOCSARP
allowxperm network_stack self:udp_socket ioctl priv_sock_ioctls;

# The DhcpClient uses packet_sockets
allow network_stack self:packet_socket create_socket_perms_no_ioctl;

# Monitor neighbors via netlink.
allow network_stack self:netlink_route_socket nlmsg_write;

allow network_stack app_api_service:service_manager find;
allow network_stack dnsresolver_service:service_manager find;
allow network_stack netd_service:service_manager find;
allow network_stack radio_service:service_manager find;
allow network_stack radio_data_file:dir create_dir_perms;
allow network_stack radio_data_file:file create_file_perms;

binder_call(network_stack, netd);

# Create/use netlink_tcpdiag_socket to get tcp info
allow network_stack self:netlink_tcpdiag_socket { create_socket_perms_no_ioctl nlmsg_read nlmsg_write };
############### Tethering Service app - Tethering.apk ##############
hal_client_domain(network_stack, hal_tetheroffload)
# Create and share netlink_netfilter_sockets for tetheroffload.
allow network_stack self:netlink_netfilter_socket create_socket_perms_no_ioctl;
allow network_stack network_stack_service:service_manager find;
# allow Tethering(network_stack process) to run/update/read the eBPF maps to offload tethering traffic by eBPF.
allow network_stack fs_bpf:dir search;
allow network_stack fs_bpf:file { read write };
allow network_stack bpfloader:bpf { map_read map_write prog_run };