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Your IP : 18.221.116.226
# -*- coding: utf-8 -*-
#
# Copyright (C) 2011-2016 Red Hat, Inc.
#
# Authors:
# Thomas Woerner <twoerner@redhat.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
import time
import copy
from firewall.core.base import SHORTCUTS, DEFAULT_ZONE_TARGET, SOURCE_IPSET_TYPES
from firewall.core.fw_transaction import FirewallTransaction
from firewall.core.io.policy import Policy
from firewall.core.logger import log
from firewall.core.rich import Rich_Service, Rich_Port, Rich_Protocol, Rich_SourcePort, Rich_ForwardPort, \
Rich_IcmpBlock, Rich_IcmpType, Rich_Masquerade, Rich_Mark
from firewall.functions import checkIPnMask, checkIP6nMask, check_mac
from firewall import errors
from firewall.errors import FirewallError
from firewall.fw_types import LastUpdatedOrderedDict
class FirewallZone(object):
ZONE_POLICY_PRIORITY = 0
def __init__(self, fw):
self._fw = fw
self._zones = { }
self._zone_policies = { }
def __repr__(self):
return '%s(%r)' % (self.__class__, self._zones)
def cleanup(self):
self._zones.clear()
self._zone_policies.clear()
def new_transaction(self):
return FirewallTransaction(self._fw)
def policy_name_from_zones(self, fromZone, toZone):
return "zone_{fromZone}_{toZone}".format(fromZone=fromZone, toZone=toZone)
# zones
def get_zones(self):
return sorted(self._zones.keys())
def get_active_zones(self):
active_zones = []
for zone in self.get_zones():
if self.list_interfaces(zone) or self.list_sources(zone):
active_zones.append(zone)
return active_zones
def get_zone_of_interface(self, interface):
interface_id = self.__interface_id(interface)
for zone in self._zones:
if interface_id in self._zones[zone].settings["interfaces"]:
# an interface can only be part of one zone
return zone
return None
def get_zone_of_source(self, source):
source_id = self.__source_id(source)
for zone in self._zones:
if source_id in self._zones[zone].settings["sources"]:
# a source_id can only be part of one zone
return zone
return None
def get_zone(self, zone):
z = self._fw.check_zone(zone)
return self._zones[z]
def policy_obj_from_zone_obj(self, z_obj, fromZone, toZone):
p_obj = Policy()
p_obj.derived_from_zone = z_obj.name
p_obj.name = self.policy_name_from_zones(fromZone, toZone)
p_obj.priority = self.ZONE_POLICY_PRIORITY
p_obj.target = z_obj.target
p_obj.ingress_zones = [fromZone]
p_obj.egress_zones = [toZone]
# copy zone permanent config to policy permanent config
# WARN: This assumes the same attribute names.
#
for setting in ["services", "ports",
"masquerade", "forward_ports",
"source_ports",
"icmp_blocks", "rules",
"protocols"]:
if fromZone == z_obj.name and toZone == "HOST" and \
setting in ["services", "ports", "source_ports", "icmp_blocks", "protocols"]:
# zone --> HOST
setattr(p_obj, setting, copy.deepcopy(getattr(z_obj, setting)))
elif fromZone == "ANY" and toZone == z_obj.name and setting in ["masquerade"]:
# any zone --> zone
setattr(p_obj, setting, copy.deepcopy(getattr(z_obj, setting)))
elif fromZone == z_obj.name and toZone == "ANY" and \
setting in ["icmp_blocks", "forward_ports"]:
# zone --> any zone
setattr(p_obj, setting, copy.deepcopy(getattr(z_obj, setting)))
elif setting in ["rules"]:
p_obj.rules = []
for rule in z_obj.rules:
current_policy = self.policy_name_from_zones(fromZone, toZone)
if current_policy in self._rich_rule_to_policies(z_obj.name, rule):
p_obj.rules.append(copy.deepcopy(rule))
return p_obj
def add_zone(self, obj):
obj.settings = { x : LastUpdatedOrderedDict()
for x in ["interfaces", "sources",
"icmp_block_inversion",
"forward"] }
self._zones[obj.name] = obj
self._zone_policies[obj.name] = []
# Create policy objects, will need many:
# - (zone --> HOST) - ports, service, etc
# - (any zone --> zone) - masquerade
# - (zone --> any zone) - ICMP block, icmp block inversion
# - also includes forward-ports because it works on (nat,
# PREROUTING) and therefore applies to redirects to the local
# host or dnat to a different host.
# - also includes rich rule "mark" action for the same reason
#
for fromZone,toZone in [(obj.name, "HOST"),
("ANY", obj.name), (obj.name, "ANY")]:
p_obj = self.policy_obj_from_zone_obj(obj, fromZone, toZone)
self._fw.policy.add_policy(p_obj)
self._zone_policies[obj.name].append(p_obj.name)
self.copy_permanent_to_runtime(obj.name)
def copy_permanent_to_runtime(self, zone):
obj = self._zones[zone]
for arg in obj.interfaces:
self.add_interface(zone, arg, allow_apply=False)
for arg in obj.sources:
self.add_source(zone, arg, allow_apply=False)
if obj.forward:
self.add_forward(zone)
if obj.icmp_block_inversion:
self.add_icmp_block_inversion(zone)
def remove_zone(self, zone):
obj = self._zones[zone]
if obj.applied:
self.unapply_zone_settings(zone)
obj.settings.clear()
del self._zones[zone]
del self._zone_policies[zone]
def apply_zones(self, use_transaction=None):
for zone in self.get_zones():
z_obj = self._zones[zone]
if len(z_obj.interfaces) > 0 or len(z_obj.sources) > 0:
log.debug1("Applying zone '%s'", zone)
self.apply_zone_settings(zone, use_transaction=use_transaction)
def set_zone_applied(self, zone, applied):
obj = self._zones[zone]
obj.applied = applied
# zone from chain
def zone_from_chain(self, chain):
if "_" not in chain:
# no zone chain
return None
splits = chain.split("_")
if len(splits) < 2:
return None
_chain = None
for x in SHORTCUTS:
if splits[0] == SHORTCUTS[x]:
_chain = x
if _chain is not None:
# next part needs to be zone name
if splits[1] not in self.get_zones():
return None
if len(splits) == 2 or \
(len(splits) == 3 and splits[2] in [ "pre", "log", "deny", "allow", "post" ]):
return (splits[1], _chain)
return None
def policy_from_chain(self, chain):
x = self.zone_from_chain(chain)
if x is None:
return None
(zone, _chain) = x
# derived from _get_table_chains_for_zone_dispatch()
if _chain in ["PREROUTING", "FORWARD_IN"]:
fromZone = zone
toZone = "ANY"
elif _chain in ["INPUT"]:
fromZone = zone
toZone = "HOST"
elif _chain in ["POSTROUTING", "FORWARD_OUT"]:
fromZone = "ANY"
toZone = zone
else:
raise FirewallError(errors.INVALID_CHAIN, "chain '%s' can't be mapped to a policy" % (chain))
return (self.policy_name_from_zones(fromZone, toZone), _chain)
def create_zone_base_by_chain(self, ipv, table, chain,
use_transaction=None):
# Create zone base chains if the chain is reserved for a zone
if ipv in [ "ipv4", "ipv6" ]:
x = self.policy_from_chain(chain)
if x is not None:
(policy, _chain) = self.policy_from_chain(chain)
if use_transaction is None:
transaction = self.new_transaction()
else:
transaction = use_transaction
self._fw.policy.gen_chain_rules(policy, True, table, _chain,
transaction)
if use_transaction is None:
transaction.execute(True)
# settings
# generate settings record with sender, timeout
def __gen_settings(self, timeout, sender):
ret = {
"date": time.time(),
"sender": sender,
"timeout": timeout,
}
return ret
def get_settings(self, zone):
return self.get_zone(zone).settings
def _zone_settings(self, enable, zone, transaction):
settings = self.get_settings(zone)
for key in settings:
for args in settings[key]:
if key == "interfaces":
self._interface(enable, zone, args, transaction)
elif key == "sources":
self._source(enable, zone, args[0], args[1], transaction)
elif key == "icmp_block_inversion":
continue
elif key == "forward":
# no need to call this when applying the zone as the rules
# will be generated when adding the interfaces/sources
pass
else:
log.warning("Zone '%s': Unknown setting '%s:%s', "
"unable to apply", zone, key, args)
# ICMP-block-inversion is always applied
if enable:
self._icmp_block_inversion(enable, zone, transaction)
def apply_zone_settings(self, zone, use_transaction=None):
_zone = self._fw.check_zone(zone)
obj = self._zones[_zone]
if obj.applied:
return
obj.applied = True
if use_transaction is None:
transaction = self.new_transaction()
else:
transaction = use_transaction
for policy in self._zone_policies[_zone]:
log.debug1("Applying policy (%s) derived from zone '%s'", policy, zone)
self._fw.policy.apply_policy_settings(policy, use_transaction=transaction)
self._zone_settings(True, _zone, transaction)
if use_transaction is None:
transaction.execute(True)
def unapply_zone_settings(self, zone, use_transaction=None):
_zone = self._fw.check_zone(zone)
obj = self._zones[_zone]
if not obj.applied:
return
if use_transaction is None:
transaction = self.new_transaction()
else:
transaction = use_transaction
for policy in self._zone_policies[_zone]:
self._fw.policy.unapply_policy_settings(policy, use_transaction=transaction)
self._zone_settings(False, _zone, transaction)
if use_transaction is None:
transaction.execute(True)
def get_config_with_settings(self, zone):
"""
:return: exported config updated with runtime settings
"""
obj = self.get_zone(zone)
conf_dict = self.get_config_with_settings_dict(zone)
conf_list = []
for i in range(16): # tuple based API has 16 elements
if obj.IMPORT_EXPORT_STRUCTURE[i][0] not in conf_dict:
# old API needs the empty elements as well. Grab it from the
# class otherwise we don't know the type.
conf_list.append(copy.deepcopy(getattr(obj, obj.IMPORT_EXPORT_STRUCTURE[i][0])))
else:
conf_list.append(conf_dict[obj.IMPORT_EXPORT_STRUCTURE[i][0]])
return tuple(conf_list)
def get_config_with_settings_dict(self, zone):
"""
:return: exported config updated with runtime settings
"""
permanent = self.get_zone(zone).export_config_dict()
if permanent["target"] == DEFAULT_ZONE_TARGET:
permanent["target"] = "default"
runtime = { "services": self.list_services(zone),
"ports": self.list_ports(zone),
"icmp_blocks": self.list_icmp_blocks(zone),
"masquerade": self.query_masquerade(zone),
"forward_ports": self.list_forward_ports(zone),
"interfaces": self.list_interfaces(zone),
"sources": self.list_sources(zone),
"rules_str": self.list_rules(zone),
"protocols": self.list_protocols(zone),
"source_ports": self.list_source_ports(zone),
"icmp_block_inversion": self.query_icmp_block_inversion(zone),
"forward": self.query_forward(zone),
}
return self._fw.combine_runtime_with_permanent_settings(permanent, runtime)
def set_config_with_settings_dict(self, zone, settings, sender):
# stupid wrappers to convert rich rule string to rich rule object
from firewall.core.rich import Rich_Rule
def add_rule_wrapper(zone, rule_str, timeout=0, sender=None):
self.add_rule(zone, Rich_Rule(rule_str=rule_str), timeout=0, sender=sender)
def remove_rule_wrapper(zone, rule_str):
self.remove_rule(zone, Rich_Rule(rule_str=rule_str))
setting_to_fn = {
"services": (self.add_service, self.remove_service),
"ports": (self.add_port, self.remove_port),
"icmp_blocks": (self.add_icmp_block, self.remove_icmp_block),
"masquerade": (self.add_masquerade, self.remove_masquerade),
"forward_ports": (self.add_forward_port, self.remove_forward_port),
"interfaces": (self.add_interface, self.remove_interface),
"sources": (self.add_source, self.remove_source),
"rules_str": (add_rule_wrapper, remove_rule_wrapper),
"protocols": (self.add_protocol, self.remove_protocol),
"source_ports": (self.add_source_port, self.remove_source_port),
"icmp_block_inversion": (self.add_icmp_block_inversion, self.remove_icmp_block_inversion),
"forward": (self.add_forward, self.remove_forward),
}
old_settings = self.get_config_with_settings_dict(zone)
(add_settings, remove_settings) = self._fw.get_added_and_removed_settings(old_settings, settings)
for key in remove_settings:
if isinstance(remove_settings[key], list):
for args in remove_settings[key]:
if isinstance(args, tuple):
setting_to_fn[key][1](zone, *args)
else:
setting_to_fn[key][1](zone, args)
else: # bool
setting_to_fn[key][1](zone)
for key in add_settings:
if isinstance(add_settings[key], list):
for args in add_settings[key]:
if key in ["interfaces", "sources"]:
# no timeout arg
setting_to_fn[key][0](zone, args, sender=sender)
else:
if isinstance(args, tuple):
setting_to_fn[key][0](zone, *args, timeout=0, sender=sender)
else:
setting_to_fn[key][0](zone, args, timeout=0, sender=sender)
else: # bool
if key in ["icmp_block_inversion"]:
# no timeout arg
setting_to_fn[key][0](zone, sender=sender)
else:
setting_to_fn[key][0](zone, timeout=0, sender=sender)
# INTERFACES
def check_interface(self, interface):
self._fw.check_interface(interface)
def interface_get_sender(self, zone, interface):
_zone = self._fw.check_zone(zone)
_obj = self._zones[_zone]
interface_id = self.__interface_id(interface)
if interface_id in _obj.settings["interfaces"]:
settings = _obj.settings["interfaces"][interface_id]
if "sender" in settings and settings["sender"] is not None:
return settings["sender"]
return None
def __interface_id(self, interface):
self.check_interface(interface)
return interface
def add_interface(self, zone, interface, sender=None,
use_transaction=None, allow_apply=True):
self._fw.check_panic()
_zone = self._fw.check_zone(zone)
_obj = self._zones[_zone]
interface_id = self.__interface_id(interface)
if interface_id in _obj.settings["interfaces"]:
raise FirewallError(errors.ZONE_ALREADY_SET,
"'%s' already bound to '%s'" % (interface,
zone))
if self.get_zone_of_interface(interface) is not None:
raise FirewallError(errors.ZONE_CONFLICT,
"'%s' already bound to a zone" % interface)
log.debug1("Setting zone of interface '%s' to '%s'" % (interface,
_zone))
if use_transaction is None:
transaction = self.new_transaction()
else:
transaction = use_transaction
if not _obj.applied and allow_apply:
self.apply_zone_settings(zone,
use_transaction=transaction)
transaction.add_fail(self.set_zone_applied, _zone, False)
if allow_apply:
self._interface(True, _zone, interface, transaction)
self.__register_interface(_obj, interface_id, zone, sender)
transaction.add_fail(self.__unregister_interface, _obj,
interface_id)
if use_transaction is None:
transaction.execute(True)
return _zone
def __register_interface(self, _obj, interface_id, zone, sender):
_obj.settings["interfaces"][interface_id] = \
self.__gen_settings(0, sender)
# add information whether we add to default or specific zone
_obj.settings["interfaces"][interface_id]["__default__"] = \
(not zone or zone == "")
def change_zone_of_interface(self, zone, interface, sender=None):
self._fw.check_panic()
_old_zone = self.get_zone_of_interface(interface)
_new_zone = self._fw.check_zone(zone)
if _new_zone == _old_zone:
return _old_zone
if _old_zone is not None:
self.remove_interface(_old_zone, interface)
_zone = self.add_interface(zone, interface, sender)
return _zone
def change_default_zone(self, old_zone, new_zone, use_transaction=None):
self._fw.check_panic()
if use_transaction is None:
transaction = self.new_transaction()
else:
transaction = use_transaction
self.apply_zone_settings(new_zone, transaction)
self._interface(True, new_zone, "+", transaction, append=True)
if old_zone is not None and old_zone != "":
self._interface(False, old_zone, "+", transaction, append=True)
if use_transaction is None:
transaction.execute(True)
def remove_interface(self, zone, interface,
use_transaction=None):
self._fw.check_panic()
zoi = self.get_zone_of_interface(interface)
if zoi is None:
raise FirewallError(errors.UNKNOWN_INTERFACE,
"'%s' is not in any zone" % interface)
_zone = zoi if zone == "" else self._fw.check_zone(zone)
if zoi != _zone:
raise FirewallError(errors.ZONE_CONFLICT,
"remove_interface(%s, %s): zoi='%s'" % \
(zone, interface, zoi))
if use_transaction is None:
transaction = self.new_transaction()
else:
transaction = use_transaction
_obj = self._zones[_zone]
interface_id = self.__interface_id(interface)
transaction.add_post(self.__unregister_interface, _obj, interface_id)
self._interface(False, _zone, interface, transaction)
if use_transaction is None:
transaction.execute(True)
return _zone
def __unregister_interface(self, _obj, interface_id):
if interface_id in _obj.settings["interfaces"]:
del _obj.settings["interfaces"][interface_id]
def query_interface(self, zone, interface):
return self.__interface_id(interface) in self.get_settings(zone)["interfaces"]
def list_interfaces(self, zone):
return self.get_settings(zone)["interfaces"].keys()
# SOURCES
def check_source(self, source, applied=False):
if checkIPnMask(source):
return "ipv4"
elif checkIP6nMask(source):
return "ipv6"
elif check_mac(source):
return ""
elif source.startswith("ipset:"):
self._check_ipset_type_for_source(source[6:])
if applied:
self._check_ipset_applied(source[6:])
return self._ipset_family(source[6:])
else:
raise FirewallError(errors.INVALID_ADDR, source)
def __source_id(self, source, applied=False):
ipv = self.check_source(source, applied=applied)
return (ipv, source)
def add_source(self, zone, source, sender=None, use_transaction=None,
allow_apply=True):
self._fw.check_panic()
_zone = self._fw.check_zone(zone)
_obj = self._zones[_zone]
if check_mac(source):
source = source.upper()
source_id = self.__source_id(source, applied=allow_apply)
if source_id in _obj.settings["sources"]:
raise FirewallError(errors.ZONE_ALREADY_SET,
"'%s' already bound to '%s'" % (source, _zone))
if self.get_zone_of_source(source) is not None:
raise FirewallError(errors.ZONE_CONFLICT,
"'%s' already bound to a zone" % source)
if use_transaction is None:
transaction = self.new_transaction()
else:
transaction = use_transaction
if not _obj.applied and allow_apply:
self.apply_zone_settings(zone,
use_transaction=transaction)
transaction.add_fail(self.set_zone_applied, _zone, False)
if allow_apply:
self._source(True, _zone, source_id[0], source_id[1], transaction)
self.__register_source(_obj, source_id, zone, sender)
transaction.add_fail(self.__unregister_source, _obj, source_id)
if use_transaction is None:
transaction.execute(True)
return _zone
def __register_source(self, _obj, source_id, zone, sender):
_obj.settings["sources"][source_id] = \
self.__gen_settings(0, sender)
# add information whether we add to default or specific zone
_obj.settings["sources"][source_id]["__default__"] = (not zone or zone == "")
def change_zone_of_source(self, zone, source, sender=None):
self._fw.check_panic()
_old_zone = self.get_zone_of_source(source)
_new_zone = self._fw.check_zone(zone)
if _new_zone == _old_zone:
return _old_zone
if check_mac(source):
source = source.upper()
if _old_zone is not None:
self.remove_source(_old_zone, source)
_zone = self.add_source(zone, source, sender)
return _zone
def remove_source(self, zone, source,
use_transaction=None):
self._fw.check_panic()
if check_mac(source):
source = source.upper()
zos = self.get_zone_of_source(source)
if zos is None:
raise FirewallError(errors.UNKNOWN_SOURCE,
"'%s' is not in any zone" % source)
_zone = zos if zone == "" else self._fw.check_zone(zone)
if zos != _zone:
raise FirewallError(errors.ZONE_CONFLICT,
"remove_source(%s, %s): zos='%s'" % \
(zone, source, zos))
if use_transaction is None:
transaction = self.new_transaction()
else:
transaction = use_transaction
_obj = self._zones[_zone]
source_id = self.__source_id(source)
transaction.add_post(self.__unregister_source, _obj, source_id)
self._source(False, _zone, source_id[0], source_id[1], transaction)
if use_transaction is None:
transaction.execute(True)
return _zone
def __unregister_source(self, _obj, source_id):
if source_id in _obj.settings["sources"]:
del _obj.settings["sources"][source_id]
def query_source(self, zone, source):
if check_mac(source):
source = source.upper()
return self.__source_id(source) in self.get_settings(zone)["sources"]
def list_sources(self, zone):
return [ k[1] for k in self.get_settings(zone)["sources"].keys() ]
def _interface(self, enable, zone, interface, transaction, append=False):
for backend in self._fw.enabled_backends():
if not backend.policies_supported:
continue
for policy in self._zone_policies[zone]:
for (table, chain) in self._fw.policy._get_table_chains_for_zone_dispatch(policy):
rules = backend.build_zone_source_interface_rules(enable,
zone, policy, interface, table, chain, append)
transaction.add_rules(backend, rules)
# intra zone forward
policy = self.policy_name_from_zones(zone, "ANY")
# Skip adding wildcard/catch-all interface (for default
# zone). Otherwise it would allow forwarding from interface
# in default zone -> interface not in default zone (but in
# a different zone).
if self.get_settings(zone)["forward"] and interface not in ["+", "*"]:
rules = backend.build_zone_forward_rules(enable, zone, policy, "filter", interface=interface)
transaction.add_rules(backend, rules)
# update policy dispatch for any policy using this zone in ingress
# or egress
for policy in self._fw.policy.get_policies_not_derived_from_zone():
if zone not in self._fw.policy.list_ingress_zones(policy) and \
zone not in self._fw.policy.list_egress_zones(policy):
continue
if policy in self._fw.policy.get_active_policies_not_derived_from_zone() and self._fw.policy.get_policy(policy).applied:
# first remove the old set of interfaces using the current zone
# settings.
if not enable and len(self.list_interfaces(zone)) == 1:
self._fw.policy.unapply_policy_settings(policy, use_transaction=transaction)
else:
self._fw.policy._ingress_egress_zones(False, policy, transaction)
# after the transaction ends and therefore the interface
# has been added to the zone's settings, update the
# dependent policies
transaction.add_post(lambda p: (p in self._fw.policy.get_active_policies_not_derived_from_zone()) and \
self._fw.policy._ingress_egress_zones_transaction(True, p), policy)
elif enable:
transaction.add_post(lambda p: (p in self._fw.policy.get_active_policies_not_derived_from_zone()) and \
self._fw.policy.apply_policy_settings(p), policy)
# IPSETS
def _ipset_family(self, name):
if self._ipset_type(name) == "hash:mac":
return None
return self._fw.ipset.get_family(name, applied=False)
def _ipset_type(self, name):
return self._fw.ipset.get_type(name, applied=False)
def _ipset_match_flags(self, name, flag):
return ",".join([flag] * self._fw.ipset.get_dimension(name))
def _check_ipset_applied(self, name):
return self._fw.ipset.check_applied(name)
def _check_ipset_type_for_source(self, name):
_type = self._ipset_type(name)
if _type not in SOURCE_IPSET_TYPES:
raise FirewallError(
errors.INVALID_IPSET,
"ipset '%s' with type '%s' not usable as source" % \
(name, _type))
def _source(self, enable, zone, ipv, source, transaction):
# For mac source bindings ipv is an empty string, the mac source will
# be added for ipv4 and ipv6
for backend in [self._fw.get_backend_by_ipv(ipv)] if ipv else self._fw.enabled_backends():
if not backend.policies_supported:
continue
for policy in self._zone_policies[zone]:
for (table, chain) in self._fw.policy._get_table_chains_for_zone_dispatch(policy):
rules = backend.build_zone_source_address_rules(enable, zone,
policy, source, table, chain)
transaction.add_rules(backend, rules)
# intra zone forward
policy = self.policy_name_from_zones(zone, "ANY")
if self.get_settings(zone)["forward"]:
rules = backend.build_zone_forward_rules(enable, zone, policy, "filter", source=source)
transaction.add_rules(backend, rules)
# update policy dispatch for any policy using this zone in ingress
# or egress
for policy in self._fw.policy.get_policies_not_derived_from_zone():
if zone not in self._fw.policy.list_ingress_zones(policy) and \
zone not in self._fw.policy.list_egress_zones(policy):
continue
if policy in self._fw.policy.get_active_policies_not_derived_from_zone() and self._fw.policy.get_policy(policy).applied:
# first remove the old set of sources using the current zone
# settings.
if not enable and len(self.list_sources(zone)) == 1:
self._fw.policy.unapply_policy_settings(policy, use_transaction=transaction)
else:
self._fw.policy._ingress_egress_zones(False, policy, transaction)
# after the transaction ends and therefore the sources
# has been added to the zone's settings, update the
# dependent policies
transaction.add_post(lambda p: (p in self._fw.policy.get_active_policies_not_derived_from_zone()) and \
self._fw.policy._ingress_egress_zones_transaction(True, p), policy)
elif enable:
transaction.add_post(lambda p: (p in self._fw.policy.get_active_policies_not_derived_from_zone()) and \
self._fw.policy.apply_policy_settings(p), policy)
def add_service(self, zone, service, timeout=0, sender=None):
zone = self._fw.check_zone(zone)
p_name = self.policy_name_from_zones(zone, "HOST")
self._fw.policy.add_service(p_name, service, timeout, sender)
return zone
def remove_service(self, zone, service):
zone = self._fw.check_zone(zone)
p_name = self.policy_name_from_zones(zone, "HOST")
self._fw.policy.remove_service(p_name, service)
return zone
def query_service(self, zone, service):
zone = self._fw.check_zone(zone)
p_name = self.policy_name_from_zones(zone, "HOST")
return self._fw.policy.query_service(p_name, service)
def list_services(self, zone):
zone = self._fw.check_zone(zone)
p_name = self.policy_name_from_zones(zone, "HOST")
return self._fw.policy.list_services(p_name)
def add_port(self, zone, port, protocol, timeout=0, sender=None):
zone = self._fw.check_zone(zone)
p_name = self.policy_name_from_zones(zone, "HOST")
self._fw.policy.add_port(p_name, port, protocol, timeout, sender)
return zone
def remove_port(self, zone, port, protocol):
zone = self._fw.check_zone(zone)
p_name = self.policy_name_from_zones(zone, "HOST")
self._fw.policy.remove_port(p_name, port, protocol)
return zone
def query_port(self, zone, port, protocol):
zone = self._fw.check_zone(zone)
p_name = self.policy_name_from_zones(zone, "HOST")
return self._fw.policy.query_port(p_name, port, protocol)
def list_ports(self, zone):
zone = self._fw.check_zone(zone)
p_name = self.policy_name_from_zones(zone, "HOST")
return self._fw.policy.list_ports(p_name)
def add_source_port(self, zone, source_port, protocol, timeout=0, sender=None):
zone = self._fw.check_zone(zone)
p_name = self.policy_name_from_zones(zone, "HOST")
self._fw.policy.add_source_port(p_name, source_port, protocol, timeout, sender)
return zone
def remove_source_port(self, zone, source_port, protocol):
zone = self._fw.check_zone(zone)
p_name = self.policy_name_from_zones(zone, "HOST")
self._fw.policy.remove_source_port(p_name, source_port, protocol)
return zone
def query_source_port(self, zone, source_port, protocol):
zone = self._fw.check_zone(zone)
p_name = self.policy_name_from_zones(zone, "HOST")
return self._fw.policy.query_source_port(p_name, source_port, protocol)
def list_source_ports(self, zone):
zone = self._fw.check_zone(zone)
p_name = self.policy_name_from_zones(zone, "HOST")
return self._fw.policy.list_source_ports(p_name)
def _rich_rule_to_policies(self, zone, rule):
zone = self._fw.check_zone(zone)
if type(rule.action) == Rich_Mark:
return [self.policy_name_from_zones(zone, "ANY")]
elif type(rule.element) in [Rich_Service, Rich_Port, Rich_Protocol,
Rich_SourcePort]:
return [self.policy_name_from_zones(zone, "HOST")]
elif type(rule.element) in [Rich_IcmpBlock, Rich_IcmpType]:
return [self.policy_name_from_zones(zone, "HOST"),
self.policy_name_from_zones(zone, "ANY")]
elif type(rule.element) in [Rich_ForwardPort]:
return [self.policy_name_from_zones(zone, "ANY")]
elif type(rule.element) in [Rich_Masquerade]:
return [self.policy_name_from_zones("ANY", zone)]
elif rule.element is None:
return [self.policy_name_from_zones(zone, "HOST")]
else:
raise FirewallError("Rich rule type (%s) not handled." % (type(rule.element)))
def add_rule(self, zone, rule, timeout=0, sender=None):
for p_name in self._rich_rule_to_policies(zone, rule):
self._fw.policy.add_rule(p_name, rule, timeout, sender)
return zone
def remove_rule(self, zone, rule):
for p_name in self._rich_rule_to_policies(zone, rule):
self._fw.policy.remove_rule(p_name, rule)
return zone
def query_rule(self, zone, rule):
ret = True
for p_name in self._rich_rule_to_policies(zone, rule):
ret = ret and self._fw.policy.query_rule(p_name, rule)
return ret
def list_rules(self, zone):
zone = self._fw.check_zone(zone)
ret = set()
for p_name in [self.policy_name_from_zones(zone, "ANY"),
self.policy_name_from_zones(zone, "HOST"),
self.policy_name_from_zones("ANY", zone)]:
ret.update(set(self._fw.policy.list_rules(p_name)))
return list(ret)
def add_protocol(self, zone, protocol, timeout=0, sender=None):
zone = self._fw.check_zone(zone)
p_name = self.policy_name_from_zones(zone, "HOST")
self._fw.policy.add_protocol(p_name, protocol, timeout, sender)
return zone
def remove_protocol(self, zone, protocol):
zone = self._fw.check_zone(zone)
p_name = self.policy_name_from_zones(zone, "HOST")
self._fw.policy.remove_protocol(p_name, protocol)
return zone
def query_protocol(self, zone, protocol):
zone = self._fw.check_zone(zone)
p_name = self.policy_name_from_zones(zone, "HOST")
return self._fw.policy.query_protocol(p_name, protocol)
def list_protocols(self, zone):
zone = self._fw.check_zone(zone)
p_name = self.policy_name_from_zones(zone, "HOST")
return self._fw.policy.list_protocols(p_name)
def add_masquerade(self, zone, timeout=0, sender=None):
zone = self._fw.check_zone(zone)
p_name = self.policy_name_from_zones("ANY", zone)
self._fw.policy.add_masquerade(p_name, timeout, sender)
return zone
def remove_masquerade(self, zone):
zone = self._fw.check_zone(zone)
p_name = self.policy_name_from_zones("ANY", zone)
self._fw.policy.remove_masquerade(p_name)
return zone
def query_masquerade(self, zone):
zone = self._fw.check_zone(zone)
p_name = self.policy_name_from_zones("ANY", zone)
return self._fw.policy.query_masquerade(p_name)
def add_forward_port(self, zone, port, protocol, toport=None,
toaddr=None, timeout=0, sender=None):
zone = self._fw.check_zone(zone)
p_name = self.policy_name_from_zones(zone, "ANY")
self._fw.policy.add_forward_port(p_name, port, protocol, toport, toaddr,
timeout, sender)
return zone
def remove_forward_port(self, zone, port, protocol, toport=None,
toaddr=None):
zone = self._fw.check_zone(zone)
p_name = self.policy_name_from_zones(zone, "ANY")
self._fw.policy.remove_forward_port(p_name, port, protocol, toport, toaddr)
return zone
def query_forward_port(self, zone, port, protocol, toport=None,
toaddr=None):
zone = self._fw.check_zone(zone)
p_name = self.policy_name_from_zones(zone, "ANY")
return self._fw.policy.query_forward_port(p_name, port, protocol, toport,
toaddr)
def list_forward_ports(self, zone):
zone = self._fw.check_zone(zone)
p_name = self.policy_name_from_zones(zone, "ANY")
return self._fw.policy.list_forward_ports(p_name)
def add_icmp_block(self, zone, icmp, timeout=0, sender=None):
zone = self._fw.check_zone(zone)
p_name = self.policy_name_from_zones(zone, "HOST")
self._fw.policy.add_icmp_block(p_name, icmp, timeout, sender)
p_name = self.policy_name_from_zones(zone, "ANY")
self._fw.policy.add_icmp_block(p_name, icmp, timeout, sender)
return zone
def remove_icmp_block(self, zone, icmp):
zone = self._fw.check_zone(zone)
p_name = self.policy_name_from_zones(zone, "HOST")
self._fw.policy.remove_icmp_block(p_name, icmp)
p_name = self.policy_name_from_zones(zone, "ANY")
self._fw.policy.remove_icmp_block(p_name, icmp)
return zone
def query_icmp_block(self, zone, icmp):
zone = self._fw.check_zone(zone)
p_name_host = self.policy_name_from_zones(zone, "HOST")
p_name_fwd = self.policy_name_from_zones(zone, "ANY")
return self._fw.policy.query_icmp_block(p_name_host, icmp) and \
self._fw.policy.query_icmp_block(p_name_fwd, icmp)
def list_icmp_blocks(self, zone):
zone = self._fw.check_zone(zone)
p_name_host = self.policy_name_from_zones(zone, "HOST")
p_name_fwd = self.policy_name_from_zones(zone, "ANY")
return sorted(set(self._fw.policy.list_icmp_blocks(p_name_host) +
self._fw.policy.list_icmp_blocks(p_name_fwd)))
def add_icmp_block_inversion(self, zone, sender=None):
zone = self._fw.check_zone(zone)
p_name = self.policy_name_from_zones(zone, "HOST")
self._fw.policy.add_icmp_block_inversion(p_name, sender)
p_name = self.policy_name_from_zones(zone, "ANY")
self._fw.policy.add_icmp_block_inversion(p_name, sender)
return zone
def _icmp_block_inversion(self, enable, zone, transaction):
zone = self._fw.check_zone(zone)
p_name = self.policy_name_from_zones(zone, "HOST")
self._fw.policy._icmp_block_inversion(enable, p_name, transaction)
p_name = self.policy_name_from_zones(zone, "ANY")
self._fw.policy._icmp_block_inversion(enable, p_name, transaction)
def remove_icmp_block_inversion(self, zone):
zone = self._fw.check_zone(zone)
p_name = self.policy_name_from_zones(zone, "HOST")
self._fw.policy.remove_icmp_block_inversion(p_name)
p_name = self.policy_name_from_zones(zone, "ANY")
self._fw.policy.remove_icmp_block_inversion(p_name)
return zone
def query_icmp_block_inversion(self, zone):
zone = self._fw.check_zone(zone)
p_name_host = self.policy_name_from_zones(zone, "HOST")
p_name_fwd = self.policy_name_from_zones(zone, "ANY")
return self._fw.policy.query_icmp_block_inversion(p_name_host) and \
self._fw.policy.query_icmp_block_inversion(p_name_fwd)
def _forward(self, enable, zone, transaction):
p_name = self.policy_name_from_zones(zone, "ANY")
for interface in self._zones[zone].settings["interfaces"]:
for backend in self._fw.enabled_backends():
if not backend.policies_supported:
continue
rules = backend.build_zone_forward_rules(enable, zone, p_name, "filter", interface=interface)
transaction.add_rules(backend, rules)
for ipv,source in self._zones[zone].settings["sources"]:
for backend in [self._fw.get_backend_by_ipv(ipv)] if ipv else self._fw.enabled_backends():
if not backend.policies_supported:
continue
rules = backend.build_zone_forward_rules(enable, zone, p_name, "filter", source=source)
transaction.add_rules(backend, rules)
def __forward_id(self):
return True
def add_forward(self, zone, timeout=0, sender=None,
use_transaction=None):
_zone = self._fw.check_zone(zone)
self._fw.check_timeout(timeout)
self._fw.check_panic()
_obj = self._zones[_zone]
forward_id = self.__forward_id()
if forward_id in _obj.settings["forward"]:
raise FirewallError(errors.ALREADY_ENABLED,
"forward already enabled in '%s'" % _zone)
if use_transaction is None:
transaction = self.new_transaction()
else:
transaction = use_transaction
if _obj.applied:
self._forward(True, _zone, transaction)
self.__register_forward(_obj, forward_id, timeout, sender)
transaction.add_fail(self.__unregister_forward, _obj, forward_id)
if use_transaction is None:
transaction.execute(True)
return _zone
def __register_forward(self, _obj, forward_id, timeout, sender):
_obj.settings["forward"][forward_id] = \
self.__gen_settings(timeout, sender)
def remove_forward(self, zone, use_transaction=None):
_zone = self._fw.check_zone(zone)
self._fw.check_panic()
_obj = self._zones[_zone]
forward_id = self.__forward_id()
if forward_id not in _obj.settings["forward"]:
raise FirewallError(errors.NOT_ENABLED,
"forward not enabled in '%s'" % _zone)
if use_transaction is None:
transaction = self.new_transaction()
else:
transaction = use_transaction
if _obj.applied:
self._forward(False, _zone, transaction)
transaction.add_post(self.__unregister_forward, _obj, forward_id)
if use_transaction is None:
transaction.execute(True)
return _zone
def __unregister_forward(self, _obj, forward_id):
if forward_id in _obj.settings["forward"]:
del _obj.settings["forward"][forward_id]
def query_forward(self, zone):
return self.__forward_id() in self.get_settings(zone)["forward"]