1# network manager
2type netd, domain, mlstrustedsubject;
3type netd_exec, exec_type, file_type;
4
5init_daemon_domain(netd)
6net_domain(netd)
7
8allow netd self:capability { net_admin net_raw kill };
9# Note: fsetid is deliberately not included above. fsetid checks are
10# triggered by chmod on a directory or file owned by a group other
11# than one of the groups assigned to the current process to see if
12# the setgid bit should be cleared, regardless of whether the setgid
13# bit was even set.  We do not appear to truly need this capability
14# for netd to operate.
15dontaudit netd self:capability fsetid;
16
17allow netd self:netlink_kobject_uevent_socket create_socket_perms;
18allow netd self:netlink_route_socket nlmsg_write;
19allow netd self:netlink_nflog_socket create_socket_perms;
20allow netd self:netlink_socket create_socket_perms;
21allow netd shell_exec:file rx_file_perms;
22allow netd system_file:file x_file_perms;
23allow netd devpts:chr_file rw_file_perms;
24
25# For /proc/sys/net/ipv[46]/route/flush.
26allow netd proc_net:file write;
27
28# For /sys/modules/bcmdhd/parameters/firmware_path
29# XXX Split into its own type.
30allow netd sysfs:file write;
31
32# Set dhcp lease for PAN connection
33set_prop(netd, dhcp_prop)
34set_prop(netd, system_prop)
35auditallow netd system_prop:property_service set;
36
37# Connect to PAN
38domain_auto_trans(netd, dhcp_exec, dhcp)
39allow netd dhcp:process signal;
40
41# Needed to update /data/misc/wifi/hostapd.conf
42# TODO: See what we can do to reduce the need for
43# these capabilities
44allow netd self:capability { dac_override chown fowner };
45allow netd wifi_data_file:file create_file_perms;
46allow netd wifi_data_file:dir rw_dir_perms;
47
48# Needed to update /data/misc/net/rt_tables
49allow netd net_data_file:file create_file_perms;
50allow netd net_data_file:dir rw_dir_perms;
51
52# Allow netd to spawn hostapd in it's own domain
53domain_auto_trans(netd, hostapd_exec, hostapd)
54allow netd hostapd:process signal;
55
56# Allow netd to spawn dnsmasq in it's own domain
57domain_auto_trans(netd, dnsmasq_exec, dnsmasq)
58allow netd dnsmasq:process signal;
59
60# Allow netd to start clatd in its own domain
61domain_auto_trans(netd, clatd_exec, clatd)
62allow netd clatd:process signal;
63
64set_prop(netd, ctl_mdnsd_prop)
65
66# Allow netd to operate on sockets that are passed to it.
67allow netd netdomain:{tcp_socket udp_socket rawip_socket dccp_socket tun_socket} {read write getattr setattr getopt setopt};
68allow netd netdomain:fd use;
69
70###
71### Neverallow rules
72###
73### netd should NEVER do any of this
74
75# Block device access.
76neverallow netd dev_type:blk_file { read write };
77
78# ptrace any other app
79neverallow netd { domain }:process ptrace;
80
81# Write to /system.
82neverallow netd system_file:dir_file_class_set write;
83
84# Write to files in /data/data or system files on /data
85neverallow netd { app_data_file system_data_file }:dir_file_class_set write;
86