# Copyright (C) 2005 Tresys Technology, LLC

policy_module(sysnetwork,1.0)

########################################

#

# Declarations

#

type dhcpc_t;

type dhcpc_exec_t;

domain_make_daemon_domain(dhcpc_t,dhcpc_exec_t)

role system_r types dhcpc_t;

type dhcpc_state_t;

files_make_file(dhcpc_state_t)

type dhcpc_tmp_t;

files_make_temporary_file(dhcpc_tmp_t)

type dhcpc_var_run_t;

files_make_daemon_runtime_file(dhcpc_var_run_t)

type ifconfig_t;

type ifconfig_exec_t;

domain_make_system_domain(ifconfig_t, ifconfig_exec_t)

role system_r types ifconfig_t;

type net_conf_t alias resolv_conf_t;

files_make_file(net_conf_t)

########################################

#

# DHCP client local policy

#

allow dhcpc_t self:capability { dac_override fsetid net_admin net_raw net_bind_service sys_resource sys_tty_config };

dontaudit dhcpc_t self:capability sys_tty_config;

# for access("/etc/bashrc", X_OK) on Red Hat

dontaudit dhcpc_t self:capability { dac_read_search sys_module };

# create pid file

allow dhcpc_t dhcpc_var_run_t:file { getattr create read write append setattr unlink };

files_create_daemon_runtime_data(dhcpc_t,dhcpc_var_run_t)

# transition to ifconfig

allow dhcpc_t ifconfig_exec_t:file { getattr read execute };

allow dhcpc_t ifconfig_t:process transition;

dontaudit dhcpc_t ifconfig_t:process { noatsecure siginh rlimitinh };

# Allow read/write to /etc/resolv.conf and /etc/ntp.conf. Note that any files

# in /etc created by dhcpcd will be labelled net_conf_t.

allow dhcpc_t net_conf_t:file { create ioctl read getattr lock write setattr append link unlink rename };

files_create_private_config(dhcpc_t,net_conf_t,file)

# create temp files

allow dhcpc_t dhcpc_tmp_t:dir { create read getattr lock setattr ioctl link unlink rename search add_name remove_name reparent write rmdir };

allow dhcpc_t dhcpc_tmp_t:file { create ioctl read getattr lock write setattr append link unlink rename };

files_create_private_tmp_data(dhcpc_t, dhcpc_tmp_t, { file dir })

# Allow dhcpc_t to use packet sockets

allow dhcpc_t self:packet_socket { create ioctl read getattr write setattr append bind connect getopt setopt shutdown };

allow dhcpc_t self:netlink_route_socket { create ioctl read getattr write setattr append bind connect getopt setopt shutdown nlmsg_read };

allow dhcpc_t self:fifo_file { ioctl read getattr lock write append };

allow dhcpc_t dhcpc_exec_t:file { getattr read execute execute_no_trans };

kernel_read_system_state(dhcpc_t)

kernel_read_network_state(dhcpc_t)

kernel_read_kernel_sysctl(dhcpc_t)

kernel_read_hardware_state(dhcpc_t)

kernel_use_file_descriptors(dhcpc_t)

corenetwork_network_tcp_on_all_interfaces(dhcpc_t)

corenetwork_network_raw_on_all_interfaces(dhcpc_t)

corenetwork_network_udp_on_all_interfaces(dhcpc_t)

corenetwork_network_tcp_on_all_nodes(dhcpc_t)

corenetwork_network_raw_on_all_nodes(dhcpc_t)

corenetwork_network_udp_on_all_nodes(dhcpc_t)

corenetwork_network_tcp_on_all_ports(dhcpc_t)

corenetwork_network_udp_on_all_ports(dhcpc_t)

corenetwork_bind_tcp_on_all_nodes(dhcpc_t)

corenetwork_bind_udp_on_all_nodes(dhcpc_t)

corenetwork_bind_udp_on_dhcpc_port(dhcpc_t)

# for SSP

devices_get_pseudorandom_data(dhcpc_t)

filesystem_get_all_filesystems_attributes(dhcpc_t)

terminal_ignore_use_console(dhcpc_t)

terminal_ignore_use_all_users_physical_terminals(dhcpc_t)

terminal_ignore_use_all_users_pseudoterminals(dhcpc_t)

terminal_ignore_use_general_physical_terminal(dhcpc_t)

init_use_file_descriptors(dhcpc_t)

init_script_use_pseudoterminal(dhcpc_t)

init_script_modify_runtime_data(dhcpc_t)

domain_use_widely_inheritable_file_descriptors(dhcpc_t)

files_read_general_system_config(dhcpc_t)

files_read_runtime_system_config(dhcpc_t)

corecommands_execute_general_programs(dhcpc_t)

corecommands_execute_system_programs(dhcpc_t)

corecommands_execute_shell(dhcpc_t)

logging_send_system_log_message(dhcpc_t)

libraries_use_dynamic_loader(dhcpc_t)

libraries_read_shared_libraries(dhcpc_t)

modutils_insmod_transition(dhcpc_t)

miscfiles_read_localization(dhcpc_t)

tunable_policy(`targeted_policy', `

terminal_ignore_use_general_physical_terminal(dhcpc_t)

terminal_ignore_use_general_pseudoterminal(dhcpc_t)

files_ignore_read_rootfs_file(dhcpc_t)

')

optional_policy(`consoletype.te',`

consoletype_transition(dhcpc_t)

')

optional_policy(`hostname.te',`

hostname_transition(dhcpc_t)

')

optional_policy(`nscd.te',`

nscd_transition(dhcpc_t)

')

optional_policy(`selinux.te',`

selinux_newrole_sigchld(dhcpc_t)

')

optional_policy(`udev.te',`

udev_read_database(dhcpc_t)

')

#

# dhclient sometimes starts ypbind and ntpd

#

init_script_execute(dhcpc_t)

optional_policy(`ypbind.te',`

ypbind_transition(dhcpc_t)

')

optional_policy(`ntpd.te',`

ntpd_transition(dhcpc_t)

')

ifdef(`TODO',`

allow dhcpc_t autofs_t:dir { search getattr };

dontaudit dhcpc_t sysadm_home_dir_t:dir search;

optional_policy(`rhgb.te', `

allow dhcpc_t rhgb_t:process sigchld;

allow dhcpc_t rhgb_t:fd use;

allow dhcpc_t rhgb_t:fifo_file { read write };

')

can_ypbind(dhcpc_t)

ifdef(`cardmgr.te', `

domain_auto_trans(cardmgr_t, dhcpc_exec_t, dhcpc_t)

allow cardmgr_t dhcpc_var_run_t:file { getattr read };

allow cardmgr_t dhcpc_t:process signal_perms;

')

ifdef(`hotplug.te', `

domain_auto_trans(hotplug_t, dhcpc_exec_t, dhcpc_t)

allow hotplug_t dhcpc_t:process signal_perms;

allow hotplug_t dhcpc_var_run_t:file { getattr read };

allow hotplug_t dhcp_etc_t:file rw_file_perms;

allow dhcpc_t hotplug_etc_t:dir { getattr search };

tunable_policy(`distro_redhat', `

logging_syslogd_transition(dhcpc_t)

')

')dnl end hotplug.te

# for the dhcp client to run ping to check IP addresses

ifdef(`ping.te', `

domain_auto_trans(dhcpc_t, ping_exec_t, ping_t)

ifdef(`hotplug.te',`

allow ping_t hotplug_t:fd use;

') dnl end if hotplug

ifdef(`cardmgr.te', `

allow ping_t cardmgr_t:fd use;

') dnl end if cardmgr

') dnl end if ping

ifdef(`dhcpd.te', `', `

#type dhcp_state_t, file_type, sysadmfile;

#type dhcp_etc_t, file_type, sysadmfile, usercanread; 

#typealias dhcp_etc_t alias { etc_dhcp_t etc_dhcpc_t etc_dhcpd_t };

')

allow dhcpc_t dhcp_etc_t:dir { getattr read search };

allow dhcpc_t dhcp_etc_t:file { read getattr };

allow dhcpc_t dhcp_etc_t:lnk_file { getattr read };

allow dhcpc_t dhcp_etc_t:file { getattr read execute execute_no_trans };

allow dhcpc_t userdomain:fd use;

ifdef(`distro_redhat', `

files_execute_system_config_script(dhcpc_t)

allow initrc_t dhcp_etc_t:file rw_file_perms;

')

allow dhcpc_t var_lib_t:dir search;

file_type_auto_trans(dhcpc_t, dhcp_state_t, dhcpc_state_t, file)

allow dhcpc_t home_root_t:dir search;

allow initrc_t dhcpc_state_t:file { getattr read };

dontaudit dhcpc_t var_lock_t:dir search;

dontaudit dhcpc_t selinux_config_t:dir search;

dontaudit dhcpc_t domain:dir getattr;

') dnl endif TODO

########################################

#

# Ifconfig local policy

#

allow ifconfig_t self:process ~{ ptrace setcurrent setexec setfscreate setrlimit execmem dyntransition };

allow ifconfig_t self:capability net_admin;

dontaudit ifconfig_t self:capability sys_module;

allow ifconfig_t self:fd use;

allow ifconfig_t self:fifo_file { read getattr lock ioctl write append };

allow ifconfig_t self:unix_dgram_socket { create ioctl read getattr write setattr append bind connect getopt setopt shutdown };

allow ifconfig_t self:unix_stream_socket { create ioctl read getattr write setattr append bind connect getopt setopt shutdown listen accept };

allow ifconfig_t self:unix_dgram_socket sendto;

allow ifconfig_t self:unix_stream_socket connectto;

allow ifconfig_t self:shm { associate getattr setattr create destroy read write lock unix_read unix_write };

allow ifconfig_t self:sem { associate getattr setattr create destroy read write unix_read unix_write };

allow ifconfig_t self:msgq { associate getattr setattr create destroy read write enqueue unix_read unix_write };

allow ifconfig_t self:msg { send receive };

# Create UDP sockets, necessary when called from dhcpc

allow ifconfig_t self:udp_socket { create ioctl read getattr write setattr append bind connect getopt setopt shutdown };

# for /sbin/ip

allow ifconfig_t self:netlink_route_socket { create ioctl read getattr write setattr append bind connect getopt setopt shutdown nlmsg_read nlmsg_write };

allow ifconfig_t self:tcp_socket { create ioctl };

files_read_general_system_config(ifconfig_t);

kernel_use_file_descriptors(ifconfig_t)

kernel_read_system_state(ifconfig_t)

kernel_read_network_state(ifconfig_t)

filesystem_get_persistent_filesystem_attributes(ifconfig_t)

terminal_ignore_use_all_users_physical_terminals(ifconfig_t)

terminal_ignore_use_all_users_pseudoterminals(ifconfig_t)

init_use_file_descriptors(ifconfig_t)

init_script_use_pseudoterminal(ifconfig_t)

init_run_init_use_file_descriptors(ifconfig_t)

domain_use_widely_inheritable_file_descriptors(ifconfig_t)

files_ignore_read_rootfs_file(ifconfig_t)

libraries_use_dynamic_loader(ifconfig_t)

libraries_read_shared_libraries(ifconfig_t)

logging_send_system_log_message(ifconfig_t)

miscfiles_read_localization(ifconfig_t)

ifdef(`TODO',`

can_ypbind(ifconfig_t)

ifdef(`automount.te', `

allow ifconfig_t autofs_t:dir { search getattr };

')

domain_auto_trans(sysadm_t, ifconfig_exec_t, ifconfig_t)

role sysadm_r types ifconfig_t;

allow ifconfig_t userdomain:fd use;

# Access terminals.

ifdef(`gnome-pty-helper.te', `allow ifconfig_t sysadm_gph_t:fd use;')

allow ifconfig_t tun_tap_device_t:chr_file { read write };

# ifconfig attempts to search some sysctl entries.

# Do not audit those attempts; comment out these rules if it is desired to

# see the denials.

dontaudit ifconfig_t { sysctl_t sysctl_net_t }:dir search;

allow ifconfig_t lib_t:file { getattr read };

optional_policy(`rhgb.te', `

allow ifconfig_t rhgb_t:process sigchld;

allow ifconfig_t rhgb_t:fd use;

allow ifconfig_t rhgb_t:fifo_file { read write };

')

') dnl endif TODO