policy_module(tftp, 1.12.0)

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

## <desc>
## <p>
## Allow tftp to modify public files
## used for public file transfer services.
## </p>
## </desc>
gen_tunable(tftp_anon_write, false)

## <desc>
## <p>
## Allow tftp to read and write files in the user home directories
## </p>
## </desc>
gen_tunable(tftp_home_dir, false)

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

type tftpd_var_run_t;
files_pid_file(tftpd_var_run_t)

type tftpdir_t;
files_type(tftpdir_t)

type tftpdir_rw_t;
files_type(tftpdir_rw_t)

type tftpd_etc_t;
files_config_file(tftpd_etc_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 create_stream_socket_perms;
allow tftpd_t self:udp_socket create_socket_perms;
allow tftpd_t self:unix_dgram_socket create_socket_perms;
allow tftpd_t self:unix_stream_socket create_stream_socket_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;

read_files_pattern(tftpd_t, tftpd_etc_t, tftpd_etc_t)

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_var_run_t, tftpd_var_run_t)
files_pid_filetrans(tftpd_t, tftpd_var_run_t, file)

kernel_read_system_state(tftpd_t)
kernel_read_kernel_sysctls(tftpd_t)

corenet_all_recvfrom_netlabel(tftpd_t)
corenet_tcp_sendrecv_generic_if(tftpd_t)
corenet_udp_sendrecv_generic_if(tftpd_t)
corenet_tcp_sendrecv_generic_node(tftpd_t)
corenet_udp_sendrecv_generic_node(tftpd_t)
corenet_tcp_sendrecv_all_ports(tftpd_t)
corenet_udp_sendrecv_all_ports(tftpd_t)
corenet_tcp_bind_generic_node(tftpd_t)
corenet_udp_bind_generic_node(tftpd_t)
corenet_udp_bind_tftp_port(tftpd_t)
corenet_sendrecv_tftp_server_packets(tftpd_t)

dev_read_sysfs(tftpd_t)

fs_getattr_all_fs(tftpd_t)
fs_search_auto_mountpoints(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)

auth_use_nsswitch(tftpd_t)

logging_send_syslog_msg(tftpd_t)

miscfiles_read_public_files(tftpd_t)

userdom_dontaudit_use_unpriv_user_fds(tftpd_t)
userdom_dontaudit_use_user_terminals(tftpd_t)
userdom_dontaudit_search_user_home_dirs(tftpd_t)

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

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

	# allow access to /home
	files_list_home(tftpd_t)
    userdom_read_user_home_content_files(tftpd_t)
    userdom_manage_user_home_content(tftpd_t)

    auth_read_all_dirs_except_shadow(tftpd_t)
    auth_read_all_files_except_shadow(tftpd_t)
    auth_read_all_symlinks_except_shadow(tftpd_t)
',`
	# Needed for permissive mode, to make sure everything gets labeled correctly
	userdom_user_home_dir_filetrans_pattern(tftpd_t, { dir file lnk_file })
')

tunable_policy(`tftp_home_dir && use_nfs_home_dirs',`
    fs_manage_nfs_files(tftpd_t)
    fs_read_nfs_symlinks(tftpd_t)
')

tunable_policy(`tftp_home_dir && use_samba_home_dirs',`
    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)
')