policy_module(tftp, 1.16.0)

########################################
#
# Declarations
#

## <desc>
##	<p>
##	Determine whether tftp can modify
##	public files used for public file
##	transfer services. Directories/Files must
##	be labeled public_content_rw_t.
##	</p>
## </desc>
gen_tunable(tftp_anon_write, false)

## <desc>
##	<p>
##	Determine whether tftp can manage
##	generic user home content.
##	</p>
## </desc>
gen_tunable(tftp_enable_homedir, false)

type tftpd_t;
type tftpd_exec_t;
init_daemon_domain(tftpd_t, tftpd_exec_t)

type tftpd_conf_t;
files_config_file(tftpd_conf_t)

type tftpd_runtime_t alias tftpd_var_run_t;
files_pid_file(tftpd_runtime_t)

type tftpdir_t;
files_type(tftpdir_t)

type tftpdir_rw_t;
files_type(tftpdir_rw_t)

########################################
#
# Local policy
#

allow tftpd_t self:capability { setgid setuid sys_chroot };
dontaudit tftpd_t self:capability sys_tty_config;
allow tftpd_t self:tcp_socket { accept listen };
allow tftpd_t self:unix_stream_socket { accept listen };

allow tftpd_t tftpd_conf_t:file read_file_perms;

allow tftpd_t tftpdir_t:dir list_dir_perms;
allow tftpd_t tftpdir_t:file read_file_perms;
allow tftpd_t tftpdir_t:lnk_file read_lnk_file_perms;

manage_dirs_pattern(tftpd_t, tftpdir_rw_t, tftpdir_rw_t)
manage_files_pattern(tftpd_t, tftpdir_rw_t, tftpdir_rw_t)
manage_lnk_files_pattern(tftpd_t, tftpdir_rw_t, tftpdir_rw_t)

manage_files_pattern(tftpd_t, tftpd_runtime_t, tftpd_runtime_t)
files_pid_filetrans(tftpd_t, tftpd_runtime_t, file)

kernel_read_system_state(tftpd_t)
kernel_read_kernel_sysctls(tftpd_t)

corenet_all_recvfrom_netlabel(tftpd_t)
corenet_udp_sendrecv_generic_if(tftpd_t)
corenet_udp_sendrecv_generic_node(tftpd_t)
corenet_udp_bind_generic_node(tftpd_t)

corenet_sendrecv_tftp_server_packets(tftpd_t)
corenet_udp_bind_tftp_port(tftpd_t)

dev_read_sysfs(tftpd_t)

domain_use_interactive_fds(tftpd_t)

files_read_etc_runtime_files(tftpd_t)
files_read_var_files(tftpd_t)
files_read_var_symlinks(tftpd_t)
files_search_var(tftpd_t)

fs_getattr_all_fs(tftpd_t)
fs_search_auto_mountpoints(tftpd_t)

auth_use_nsswitch(tftpd_t)

logging_send_syslog_msg(tftpd_t)

miscfiles_read_localization(tftpd_t)
miscfiles_read_public_files(tftpd_t)

userdom_dontaudit_use_unpriv_user_fds(tftpd_t)
userdom_dontaudit_use_user_terminals(tftpd_t)
userdom_user_home_dir_filetrans_user_home_content(tftpd_t, { dir file lnk_file })

tunable_policy(`tftp_anon_write',`
	miscfiles_manage_public_files(tftpd_t)
')

tunable_policy(`tftp_enable_homedir',`
	allow tftpd_t self:capability { dac_override dac_read_search };

	files_list_home(tftpd_t)
	userdom_manage_user_home_content_dirs(tftpd_t)
	userdom_manage_user_home_content_files(tftpd_t)
	userdom_manage_user_home_content_symlinks(tftpd_t)
')

tunable_policy(`tftp_enable_homedir && use_nfs_home_dirs',`
	fs_manage_nfs_dirs(tftpd_t)
	fs_manage_nfs_files(tftpd_t)
	fs_read_nfs_symlinks(tftpd_t)
')

tunable_policy(`tftp_enable_homedir && use_samba_home_dirs',`
	fs_manage_cifs_dirs(tftpd_t)
	fs_manage_cifs_files(tftpd_t)
	fs_read_cifs_symlinks(tftpd_t)
')

optional_policy(`
	cobbler_read_lib_files(tftpd_t)
')

optional_policy(`
	inetd_udp_service_domain(tftpd_t, tftpd_exec_t)
')

optional_policy(`
	seutil_sigchld_newrole(tftpd_t)
')

optional_policy(`
	udev_read_db(tftpd_t)
')