#DESC DHCPD - DHCP server
#
# Author: Russell Coker <russell@coker.com.au> 
# based on the dhcpc_t policy from:
#          Wayne Salamon (NAI Labs) <wsalamon@tislabs.com>
# X-Debian-Packages: dhcp dhcp3-server 
#

#################################
#
# Rules for the dhcpd_t domain.
#
# dhcpd_t is the domain for the server side of DHCP. dhcpd, the DHCP 
# server daemon rc scripts, runs in this domain.
# dhcpd_exec_t is the type of the dhcpdd executable.
# The dhcpd_t can be used for other DHCPC related files as well.
#
daemon_domain(dhcpd, `, nscd_client_domain')

# for UDP port 4011
allow dhcpd_t pxe_port_t:udp_socket name_bind;

type dhcp_etc_t, file_type, sysadmfile, usercanread;

# Use the network.
can_network(dhcpd_t)
allow dhcpd_t port_type:tcp_socket name_connect;
allow dhcpd_t dhcpd_port_t:{ tcp_socket udp_socket } name_bind;
can_ypbind(dhcpd_t)
allow dhcpd_t self:unix_dgram_socket create_socket_perms;
allow dhcpd_t self:unix_stream_socket create_socket_perms;
allow dhcpd_t self:netlink_route_socket r_netlink_socket_perms;

allow dhcpd_t var_lib_t:dir search;

allow dhcpd_t devtty_t:chr_file { read write };

# Use capabilities
allow dhcpd_t self:capability { net_raw net_bind_service };
dontaudit dhcpd_t self:capability  net_admin;

# Allow access to the dhcpd file types
type dhcp_state_t, file_type, sysadmfile;
type dhcpd_state_t, file_type, sysadmfile;
allow dhcpd_t dhcp_etc_t:file { read getattr };
allow dhcpd_t dhcp_etc_t:dir search;
file_type_auto_trans(dhcpd_t, dhcp_state_t, dhcpd_state_t, file)
rw_dir_create_file(dhcpd_t, dhcpd_state_t)

allow dhcpd_t etc_t:lnk_file read;
allow dhcpd_t { etc_t etc_runtime_t }:file r_file_perms;

# Allow dhcpd_t programs to execute themselves and bin_t (uname etc)
can_exec(dhcpd_t, { dhcpd_exec_t bin_t })

# Allow dhcpd_t to use packet sockets
allow dhcpd_t self:packet_socket create_socket_perms;
allow dhcpd_t self:rawip_socket create_socket_perms;

# allow to run utilities and scripts
allow dhcpd_t { bin_t sbin_t }:dir r_dir_perms;
allow dhcpd_t { bin_t sbin_t }:{ file lnk_file } rx_file_perms;
allow dhcpd_t self:fifo_file { read write getattr };

# allow reading /proc
allow dhcpd_t proc_t:{ file lnk_file } r_file_perms;
tmp_domain(dhcpd)

ifdef(`distro_gentoo', `
allow dhcpd_t self:capability { chown dac_override setgid setuid sys_chroot };
allow initrc_t dhcpd_state_t:file setattr;
')
r_dir_file(dhcpd_t, usr_t)
allow dhcpd_t { urandom_device_t random_device_t }:chr_file r_file_perms;

ifdef(`named.te', `
allow dhcpd_t { named_conf_t named_zone_t }:dir search;
allow dhcpd_t dnssec_t:file { getattr read };
')