policy for systemd-networkd

Policy needed for systemd-networkd to function.  This is based on a patch from krzysztof.a.nowicki at gmail.com that was submitted back in May (I talked to him via email a while ago about me picking up the patch).  He was too busy to update and I needed to get it working.

I am pretty sure I updated everything mentioned in previous feedback, please comment if something is still off and I will revise.

Signed-off-by: Dave Sugar <dsugar@tresys.com>

policy/modules/system/init.te

@@ -329,6 +329,7 @@ ifdef(`init_systemd',`
 	systemd_relabelto_tmpfiles_conf_files(init_t)
 	systemd_relabelto_journal_dirs(init_t)
 	systemd_relabelto_journal_files(init_t)
+	systemd_rw_networkd_netlink_route_sockets(init_t)
 
 	term_create_devpts_dirs(init_t)
 

policy/modules/system/sysnetwork.fc

@@ -24,6 +24,8 @@ ifdef(`distro_debian',`
 /etc/dhcp3(/.*)?		gen_context(system_u:object_r:dhcp_etc_t,s0)
 /etc/dhcp3?/dhclient.*		gen_context(system_u:object_r:dhcp_etc_t,s0)
 
+/etc/systemd/network(/.*)?	gen_context(system_u:object_r:net_conf_t,s0)
+
 ifdef(`distro_redhat',`
 /etc/sysconfig/network-scripts/.*resolv\.conf -- gen_context(system_u:object_r:net_conf_t,s0)
 /etc/sysconfig/networking(/.*)? gen_context(system_u:object_r:net_conf_t,s0)

policy/modules/system/systemd.fc

@@ -23,6 +23,7 @@
 /usr/lib/systemd/systemd-localed	--	gen_context(system_u:object_r:systemd_locale_exec_t,s0)
 /usr/lib/systemd/systemd-logind		--	gen_context(system_u:object_r:systemd_logind_exec_t,s0)
 /usr/lib/systemd/systemd-machined	--	gen_context(system_u:object_r:systemd_machined_exec_t,s0)
+/usr/lib/systemd/systemd-networkd	--	gen_context(system_u:object_r:systemd_networkd_exec_t,s0)
 /usr/lib/systemd/systemd-resolved	--	gen_context(system_u:object_r:systemd_resolved_exec_t,s0)
 /usr/lib/systemd/systemd-user-sessions	--	gen_context(system_u:object_r:systemd_sessions_exec_t,s0)
 
@@ -36,6 +37,7 @@
 /usr/lib/systemd/system/[^/]*suspend.*	--	gen_context(system_u:object_r:power_unit_t,s0)
 /usr/lib/systemd/system/systemd-backlight.*	--	gen_context(system_u:object_r:systemd_backlight_unit_t,s0)
 /usr/lib/systemd/system/systemd-binfmt.*	--	gen_context(system_u:object_r:systemd_binfmt_unit_t,s0)
+/usr/lib/systemd/system/systemd-networkd.*		gen_context(system_u:object_r:systemd_networkd_unit_t,s0)
 
 /var/lib/systemd/backlight(/.*)?	gen_context(system_u:object_r:systemd_backlight_var_lib_t,s0)
 /var/lib/systemd/coredump(/.*)?	gen_context(system_u:object_r:systemd_coredump_var_lib_t,s0)
@@ -52,6 +54,7 @@
 /run/systemd/inhibit(/.*)?	gen_context(system_u:object_r:systemd_logind_var_run_t,s0)
 /run/systemd/nspawn(/.*)?	gen_context(system_u:object_r:systemd_nspawn_var_run_t,s0)
 /run/systemd/machines(/.*)?	gen_context(system_u:object_r:systemd_machined_var_run_t,s0)
+/run/systemd/netif(/.*)?	gen_context(system_u:object_r:systemd_networkd_var_run_t,s0)
 
 /run/tmpfiles\.d	-d	gen_context(system_u:object_r:systemd_tmpfiles_conf_t,s0)
 /run/tmpfiles\.d/.*		<<none>>

policy/modules/system/systemd.if

@@ -388,6 +388,121 @@ interface(`systemd_relabelto_journal_files',`
 	allow $1 systemd_journal_t:file relabelto_file_perms;
 ')
 
+########################################
+## <summary>
+##	Allow domain to read systemd_networkd_t unit files
+## </summary>
+## <param name="domain">
+##	<summary>
+##	Domain allowed access.
+##	 </summary>
+## </param>
+#
+interface(`systemd_read_networkd_units',`
+	gen_require(`
+		type systemd_networkd_t;
+	')
+
+	init_search_units($1)
+	list_dirs_pattern($1, systemd_networkd_unit_t, systemd_networkd_unit_t)
+	read_files_pattern($1, systemd_networkd_unit_t, systemd_networkd_unit_t)
+')
+
+########################################
+## <summary>
+##	Allow domain to create/manage systemd_networkd_t unit files
+## </summary>
+## <param name="domain">
+##	<summary>
+##	Domain allowed access.
+##	 </summary>
+## </param>
+#
+interface(`systemd_manage_networkd_units',`
+	gen_require(`
+		type systemd_networkd_unit_t;
+	')
+
+	init_search_units($1)
+	manage_dirs_pattern($1, systemd_networkd_unit_t, systemd_networkd_unit_t)
+	manage_files_pattern($1, systemd_networkd_unit_t, systemd_networkd_unit_t)
+')
+
+########################################
+## <summary>
+##	Allow specified domain to start systemd-networkd units
+## </summary>
+## <param name="domain">
+##	<summary>
+##	Domain allowed access.
+##	</summary>
+## </param>
+#
+interface(`systemd_startstop_networkd',`
+	gen_require(`
+		type systemd_networkd_unit_t;
+		class service { start stop };
+	')
+
+	allow $1 systemd_networkd_unit_t:service { start stop };
+')
+
+########################################
+## <summary>
+##	Allow specified domain to get status of systemd-networkd
+## </summary>
+## <param name="domain">
+##	<summary>
+##	Domain allowed access.
+##	</summary>
+## </param>
+#
+interface(`systemd_status_networkd',`
+	gen_require(`
+		type systemd_networkd_unit_t;
+		class service status;
+	')
+
+	allow $1 systemd_networkd_unit_t:service status;
+')
+
+#######################################
+## <summary>
+## Relabel systemd_networkd tun socket.
+## </summary>
+## <param name="domain">
+## <summary>
+## Domain allowed access.
+## </summary>
+## </param>
+#
+interface(`systemd_relabelfrom_networkd_tun_sockets',`
+	gen_require(`
+		type systemd_networkd_t;
+	')
+
+	allow $1 systemd_networkd_t:tun_socket relabelfrom;
+')
+
+#######################################
+## <summary>
+## Read/Write from systemd_networkd netlink route socket.
+## </summary>
+## <param name="domain">
+## <summary>
+## Domain allowed access.
+## </summary>
+## </param>
+#
+interface(`systemd_rw_networkd_netlink_route_sockets',`
+	gen_require(`
+		type systemd_networkd_t;
+	')
+
+	allow $1 systemd_networkd_t:netlink_route_socket client_stream_socket_perms;
+')
+
+
 ########################################
 ## <summary>
 ##     Allow systemd_logind_t to read process state for cgroup file

policy/modules/system/systemd.te

@@ -109,6 +109,16 @@ type systemd_machined_var_run_t;
 files_pid_file(systemd_machined_var_run_t)
 init_daemon_pid_file(systemd_machined_var_run_t, dir, "machines")
 
+type systemd_networkd_t;
+type systemd_networkd_exec_t;
+init_system_domain(systemd_networkd_t, systemd_networkd_exec_t)
+
+type systemd_networkd_unit_t;
+init_unit_file(systemd_networkd_unit_t)
+
+type systemd_networkd_var_run_t;
+files_pid_file(systemd_networkd_var_run_t)
+
 type systemd_notify_t;
 type systemd_notify_exec_t;
 init_daemon_domain(systemd_notify_t, systemd_notify_exec_t)
@@ -514,6 +524,66 @@ optional_policy(`
 	dbus_system_bus_client(systemd_machined_t)
 ')
 
+########################################
+#
+# networkd local policy
+#
+
+allow systemd_networkd_t self:capability { chown dac_override fowner net_admin net_raw setgid setpcap setuid };
+allow systemd_networkd_t self:netlink_kobject_uevent_socket create_socket_perms;
+allow systemd_networkd_t self:netlink_route_socket { create_socket_perms nlmsg_read nlmsg_write };
+allow systemd_networkd_t self:packet_socket create_socket_perms;
+allow systemd_networkd_t self:process { getcap setcap setfscreate };
+allow systemd_networkd_t self:rawip_socket create_socket_perms;
+allow systemd_networkd_t self:tun_socket { create_socket_perms relabelfrom relabelto };
+allow systemd_networkd_t self:udp_socket create_socket_perms;
+allow systemd_networkd_t self:unix_dgram_socket create_socket_perms;
+
+manage_dirs_pattern(systemd_networkd_t, systemd_networkd_var_run_t, systemd_networkd_var_run_t)
+manage_files_pattern(systemd_networkd_t, systemd_networkd_var_run_t, systemd_networkd_var_run_t)
+manage_lnk_files_pattern(systemd_networkd_t, systemd_networkd_var_run_t, systemd_networkd_var_run_t)
+
+kernel_dgram_send(systemd_networkd_t)
+kernel_read_system_state(systemd_networkd_t)
+kernel_read_kernel_sysctls(systemd_networkd_t)
+kernel_read_network_state(systemd_networkd_t)
+kernel_request_load_module(systemd_networkd_t)
+kernel_rw_net_sysctls(systemd_networkd_t)
+
+corecmd_bin_entry_type(systemd_networkd_t)
+corecmd_exec_bin(systemd_networkd_t)
+
+corenet_rw_tun_tap_dev(systemd_networkd_t)
+
+dev_read_urand(systemd_networkd_t)
+dev_read_sysfs(systemd_networkd_t)
+dev_write_kmsg(systemd_networkd_t)
+
+files_read_etc_files(systemd_networkd_t)
+
+auth_use_nsswitch(systemd_networkd_t)
+
+init_dgram_send(systemd_networkd_t)
+init_read_state(systemd_networkd_t)
+
+logging_send_syslog_msg(systemd_networkd_t)
+
+miscfiles_read_localization(systemd_networkd_t)
+
+sysnet_read_config(systemd_networkd_t)
+
+systemd_log_parse_environment(systemd_networkd_t)
+
+optional_policy(`
+	dbus_system_bus_client(systemd_networkd_t)
+	dbus_connect_system_bus(systemd_networkd_t)
+')
+
+optional_policy(`
+	udev_read_db(systemd_networkd_t)
+	udev_read_pid_files(systemd_networkd_t)
+')
+
 ########################################
 #
 # systemd_notify local policy