1# Networking service app
2typeattribute network_stack coredomain, mlstrustedsubject;
3
4app_domain(network_stack);
5net_domain(network_stack);
6
7allow network_stack self:global_capability_class_set {
8    net_admin
9    net_bind_service
10    net_broadcast
11    net_raw
12};
13
14# Allow access to net_admin ioctl, DHCP server uses SIOCSARP
15allowxperm network_stack self:udp_socket ioctl priv_sock_ioctls;
16
17# The DhcpClient uses packet_sockets
18allow network_stack self:packet_socket create_socket_perms_no_ioctl;
19
20# Monitor neighbors via netlink.
21allow network_stack self:netlink_route_socket nlmsg_write;
22
23allow network_stack app_api_service:service_manager find;
24allow network_stack dnsresolver_service:service_manager find;
25allow network_stack netd_service:service_manager find;
26allow network_stack network_watchlist_service:service_manager find;
27allow network_stack radio_service:service_manager find;
28allow network_stack system_config_service:service_manager find;
29allow network_stack radio_data_file:dir create_dir_perms;
30allow network_stack radio_data_file:file create_file_perms;
31
32binder_call(network_stack, netd);
33
34# in order to invoke side effect of close() on such a socket calling synchronize_rcu()
35# TODO: Remove this permission when 4.9 kernel is deprecated.
36allow network_stack self:key_socket create;
37# Java's Os.close() in libcore/luni/src/main/java/libcore/io/BlockGuardOs.java;l=100
38# calls if (fd.isSocket$()) if (isLingerSocket(fd)) ...
39dontaudit network_stack self:key_socket getopt;
40
41# Grant read permission of connectivity namespace system property prefix.
42get_prop(network_stack, device_config_connectivity_prop)
43
44# Create/use netlink_tcpdiag_socket to get tcp info
45allow network_stack self:netlink_tcpdiag_socket { create_socket_perms_no_ioctl nlmsg_read nlmsg_write };
46############### Tethering Service app - Tethering.apk ##############
47hal_client_domain(network_stack, hal_tetheroffload)
48# Create and share netlink_netfilter_sockets for tetheroffload.
49allow network_stack self:netlink_netfilter_socket create_socket_perms_no_ioctl;
50allow network_stack network_stack_service:service_manager find;
51# allow Tethering(network_stack process) to run/update/read the eBPF maps to offload tethering traffic by eBPF.
52allow network_stack { fs_bpf fs_bpf_tethering }:dir search;
53allow network_stack { fs_bpf fs_bpf_tethering }:file { read write };
54allow network_stack bpfloader:bpf { map_read map_write prog_run };
55
56# Only the bpfloader and the network_stack should ever touch 'fs_bpf_tethering' programs/maps.
57# Unfortunately init/vendor_init have all sorts of extra privs
58neverallow { domain -bpfloader -init -network_stack -vendor_init } fs_bpf_tethering:dir ~getattr;
59neverallow { domain -bpfloader -init -network_stack -vendor_init } fs_bpf_tethering:file *;
60
61neverallow { domain -bpfloader -network_stack } fs_bpf_tethering:dir ~{ getattr open read search setattr };
62neverallow { domain -bpfloader -network_stack } fs_bpf_tethering:file ~{ map open read setattr };
63