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 check_entry(entry, options, ipset_type):
family = "ipv4"
if "family" in options:
if options["family"] == "inet6":
family = "ipv6"
if ipset_type == "hash:ip":
if "-" in entry:
splits = entry.split("-")
if len(splits) != 2:
raise FirewallError(
INVALID_ENTRY, "entry '%s' does not match ipset type '%s'" % (entry, ipset_type)
)
for split in splits:
if (family == "ipv4" and not checkIP(entry)) or (family == "ipv6" and not checkIP6(entry)):
raise FirewallError(
INVALID_ENTRY, "entry '%s' does not match ipset type '%s'" % (entry, ipset_type)
)
else:
if (family == "ipv4" and not checkIPnMask(entry)) or (family == "ipv6" and not checkIP6nMask(entry)):
raise FirewallError(
INVALID_ENTRY, "entry '%s' does not match ipset type '%s'" % (entry, ipset_type)
)
elif ipset_type == "hash:net":
if (family == "ipv4" and not checkIPnMask(entry)) or (family == "ipv6" and not checkIP6nMask(entry)):
raise FirewallError(INVALID_ENTRY, "entry '%s' does not match ipset type '%s'" % (entry, ipset_type))
elif ipset_type == "hash:mac":
# ipset does not allow to add 00:00:00:00:00:00
if not check_mac(entry) or entry == "00:00:00:00:00:00":
raise FirewallError(INVALID_ENTRY, "entry '%s' does not match ipset type '%s'" % (entry, ipset_type))
else:
raise FirewallError(INVALID_IPSET, "ipset type '%s' not usable" % ipset_type)
def _check_config(self, config, item, all_config):
common_check_config(self, config, item, all_config)
if item == "target":
if config not in ZONE_TARGETS:
raise FirewallError(errors.INVALID_TARGET, config)
elif item == "interfaces":
for interface in config:
if not checkInterface(interface):
raise FirewallError(errors.INVALID_INTERFACE, interface)
if self.fw_config:
for zone in self.fw_config.get_zones():
if zone == self.name:
continue
if interface in self.fw_config.get_zone(
zone).interfaces:
raise FirewallError(
errors.INVALID_INTERFACE,
"interface '{}' already bound to zone '{}'".
format(interface, zone))
elif item == "sources":
for source in config:
if not checkIPnMask(source) and not checkIP6nMask(source) and \
not check_mac(source) and not source.startswith("ipset:"):
raise FirewallError(errors.INVALID_ADDR, source)
if self.fw_config:
for zone in self.fw_config.get_zones():
if zone == self.name:
continue
if source in self.fw_config.get_zone(zone).sources:
raise FirewallError(
errors.INVALID_ADDR,
"source '{}' already bound to zone '{}'".
format(source, zone))
def parse_source(self, value):
if not checkIPnMask(value) and not checkIP6nMask(value) \
and not check_mac(value) and not \
(value.startswith("ipset:") and len(value) > 6):
raise FirewallError(errors.INVALID_ADDR,
"'%s' is no valid IPv4, IPv6 or MAC address, nor an ipset" % value)
return value
def _check_config(self, config, item):
if item == "services" and self.fw_config:
existing_services = self.fw_config.get_services()
for service in config:
if service not in existing_services:
raise FirewallError(errors.INVALID_SERVICE,
"'%s' not among existing services" % \
service)
elif item == "ports":
for port in config:
check_port(port[0])
check_tcpudp(port[1])
elif item == "protocols":
for proto in config:
check_protocol(proto)
elif item == "icmp_blocks" and self.fw_config:
existing_icmptypes = self.fw_config.get_icmptypes()
for icmptype in config:
if icmptype not in existing_icmptypes:
raise FirewallError(errors.INVALID_ICMPTYPE,
"'%s' not among existing icmp types" % \
icmptype)
elif item == "forward_ports":
for fwd_port in config:
check_port(fwd_port[0])
check_tcpudp(fwd_port[1])
if not fwd_port[2] and not fwd_port[3]:
raise FirewallError(
errors.INVALID_FORWARD,
"'%s' is missing to-port AND to-addr " % fwd_port)
if fwd_port[2]:
check_port(fwd_port[2])
if fwd_port[3]:
if not checkIP(fwd_port[3]) and not checkIP6(fwd_port[3]):
raise FirewallError(
errors.INVALID_ADDR,
"to-addr '%s' is not a valid address" %
fwd_port[3])
elif item == "source_ports":
for port in config:
check_port(port[0])
check_tcpudp(port[1])
elif item == "target":
if config not in ZONE_TARGETS:
raise FirewallError(errors.INVALID_TARGET, config)
elif item == "interfaces":
for interface in config:
if not checkInterface(interface):
raise FirewallError(errors.INVALID_INTERFACE, interface)
elif item == "sources":
for source in config:
if not checkIPnMask(source) and not checkIP6nMask(source) and \
not check_mac(source) and not source.startswith("ipset:"):
raise FirewallError(errors.INVALID_ADDR, source)
elif item == "rules_str":
for rule in config:
rich.Rich_Rule(rule_str=rule)
def _check_config(self, config, item):
if item == "services" and self.fw_config:
existing_services = self.fw_config.get_services()
for service in config:
if not service in existing_services:
raise FirewallError(errors.INVALID_SERVICE,
"'%s' not among existing services" % \
service)
elif item == "ports":
for port in config:
check_port(port[0])
check_tcpudp(port[1])
elif item == "protocols":
for proto in config:
check_protocol(proto)
elif item == "icmp_blocks" and self.fw_config:
existing_icmptypes = self.fw_config.get_icmptypes()
for icmptype in config:
if not icmptype in existing_icmptypes:
raise FirewallError(errors.INVALID_ICMPTYPE,
"'%s' not among existing icmp types" % \
icmptype)
elif item == "forward_ports":
for fwd_port in config:
check_port(fwd_port[0])
check_tcpudp(fwd_port[1])
if not fwd_port[2] and not fwd_port[3]:
raise FirewallError(
errors.INVALID_FORWARD,
"'%s' is missing to-port AND to-addr " % fwd_port)
if fwd_port[2]:
check_port(fwd_port[2])
if fwd_port[3]:
if not checkIP(fwd_port[3]):
raise FirewallError(
errors.INVALID_ADDR,
"to-addr '%s' is not a valid address" % fwd_port[3])
elif item == "source_ports":
for port in config:
check_port(port[0])
check_tcpudp(port[1])
elif item == "target":
if config not in ZONE_TARGETS:
raise FirewallError(errors.INVALID_TARGET, config)
elif item == "interfaces":
for interface in config:
if not checkInterface(interface):
raise FirewallError(errors.INVALID_INTERFACE, interface)
elif item == "sources":
for source in config:
if not checkIPnMask(source) and not checkIP6nMask(source) and \
not check_mac(source) and not source.startswith("ipset:"):
raise FirewallError(errors.INVALID_ADDR, source)
elif item == "rules_str":
for rule in config:
Rich_Rule(rule_str=rule)
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 build_zone_source_address_rules(self, enable, zone, zone_target,
address, table, chain):
add_del = {True: "-A", False: "-D"}[enable]
opt = {
"PREROUTING": "-s",
"POSTROUTING": "-d",
"INPUT": "-s",
"FORWARD_IN": "-s",
"FORWARD_OUT": "-d",
"OUTPUT": "-d",
}[chain]
target = DEFAULT_ZONE_TARGET.format(chain=SHORTCUTS[chain], zone=zone)
if zone_target == DEFAULT_ZONE_TARGET:
action = "-g"
else:
action = "-j"
if address.startswith("ipset:"):
name = address[6:]
if opt == "-d":
opt = "dst"
else:
opt = "src"
flags = ",".join([opt] * self._fw.ipset.get_dimension(name))
rule = [
add_del,
"%s_ZONES_SOURCE" % chain, "-t", table, "-m", "set",
"--match-set", name, flags, action, target
]
else:
if check_mac(address):
# outgoing can not be set
if opt == "-d":
return ""
rule = [
add_del,
"%s_ZONES_SOURCE" % chain, "-t", table, "-m", "mac",
"--mac-source",
address.upper(), action, target
]
else:
rule = [
add_del,
"%s_ZONES_SOURCE" % chain, "-t", table, opt, address,
action, target
]
return [rule]
def _check_config(self, config, item, all_config):
common_check_config(self, config, item, all_config)
if item == "target":
if config not in ZONE_TARGETS:
raise FirewallError(errors.INVALID_TARGET, config)
elif item == "interfaces":
for interface in config:
if not checkInterface(interface):
raise FirewallError(errors.INVALID_INTERFACE, interface)
elif item == "sources":
for source in config:
if not checkIPnMask(source) and not checkIP6nMask(source) and \
not check_mac(source) and not source.startswith("ipset:"):
raise FirewallError(errors.INVALID_ADDR, source)
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 _check_config(self, config, item, all_config, all_io_objects):
common_check_config(self, config, item, all_config, all_io_objects)
if self.name in all_io_objects["policies"]:
raise FirewallError(
errors.NAME_CONFLICT,
"Zone '{}': Can't have the same name as a policy.".format(
self.name))
if item == "target":
if config not in ZONE_TARGETS:
raise FirewallError(
errors.INVALID_TARGET,
"Zone '{}': invalid target '{}'".format(self.name, config))
elif item == "interfaces":
for interface in config:
if not checkInterface(interface):
raise FirewallError(
errors.INVALID_INTERFACE,
"Zone '{}': invalid interface '{}'".format(
self.name, interface))
for zone in all_io_objects["zones"]:
if zone == self.name:
continue
if interface in all_io_objects["zones"][zone].interfaces:
raise FirewallError(
errors.INVALID_INTERFACE,
"Zone '{}': interface '{}' already bound to zone '{}'"
.format(self.name, interface, zone))
elif item == "sources":
for source in config:
if not checkIPnMask(source) and not checkIP6nMask(source) and \
not check_mac(source) and not source.startswith("ipset:"):
raise FirewallError(
errors.INVALID_ADDR,
"Zone '{}': invalid source '{}'".format(
self.name, source))
for zone in all_io_objects["zones"]:
if zone == self.name:
continue
if source in all_io_objects["zones"][zone].sources:
raise FirewallError(
errors.INVALID_ADDR,
"Zone '{}': source '{}' already bound to zone '{}'"
.format(self.name, source, zone))
def check_entry(entry, options, ipset_type):
family = "ipv4"
if "family" in options:
if options["family"] == "inet6":
family = "ipv6"
if ipset_type == "hash:ip":
if "-" in entry:
splits = entry.split("-")
if len(splits) != 2:
raise FirewallError(
errors.INVALID_ENTRY,
"entry '%s' does not match ipset type '%s'" % \
(entry, ipset_type))
for split in splits:
if (family == "ipv4" and not checkIP(split)) or \
(family == "ipv6" and not checkIP6(split)):
raise FirewallError(
errors.INVALID_ENTRY,
"entry '%s' does not match ipset type '%s'" % \
(entry, ipset_type))
else:
if (family == "ipv4" and not checkIPnMask(entry)) or \
(family == "ipv6" and not checkIP6nMask(entry)):
raise FirewallError(
errors.INVALID_ENTRY,
"entry '%s' does not match ipset type '%s'" % \
(entry, ipset_type))
elif ipset_type == "hash:net":
if (family == "ipv4" and not checkIPnMask(entry)) or \
(family == "ipv6" and not checkIP6nMask(entry)):
raise FirewallError(
errors.INVALID_ENTRY,
"entry '%s' does not match ipset type '%s'" % \
(entry, ipset_type))
elif ipset_type == "hash:mac":
# ipset does not allow to add 00:00:00:00:00:00
if not check_mac(entry) or entry == "00:00:00:00:00:00":
raise FirewallError(
errors.INVALID_ENTRY,
"entry '%s' does not match ipset type '%s'" % \
(entry, ipset_type))
else:
raise FirewallError(errors.INVALID_IPSET,
"ipset type '%s' not usable" % ipset_type)
def build_zone_source_address(self, enable, zone, zone_target, address,
table, chain):
add_del = { True: "-A", False: "-D" }[enable]
opt = {
"PREROUTING": "-s",
"POSTROUTING": "-d",
"INPUT": "-s",
"FORWARD_IN": "-s",
"FORWARD_OUT": "-d",
"OUTPUT": "-d",
}[chain]
target = DEFAULT_ZONE_TARGET.format(chain=SHORTCUTS[chain], zone=zone)
if zone_target == DEFAULT_ZONE_TARGET:
action = "-g"
else:
action = "-j"
if address.startswith("ipset:"):
name = address[6:]
if opt == "-d":
opt = "dst"
else:
opt = "src"
flags = ",".join([opt] * self._fw.ipset.get_dimension(name))
rule = [ add_del,
"%s_ZONES_SOURCE" % chain, "-t", table,
"-m", "set", "--match-set", name,
flags, action, target ]
else:
if check_mac(address):
# outgoing can not be set
if opt == "-d":
return ""
rule = [ add_del,
"%s_ZONES_SOURCE" % chain, "-t", table,
"-m", "mac", "--mac-source", address.upper(),
action, target ]
else:
rule = [ add_del,
"%s_ZONES_SOURCE" % chain, "-t", table,
opt, address, action, target ]
return rule
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 check(self):
if self.family is not None and self.family not in [ "ipv4", "ipv6" ]:
raise FirewallError(errors.INVALID_FAMILY, self.family)
if self.family is None:
if (self.source is not None and self.source.addr is not None) or \
self.destination is not None:
raise FirewallError(errors.MISSING_FAMILY)
if type(self.element) == Rich_ForwardPort:
raise FirewallError(errors.MISSING_FAMILY)
if self.element is None:
if self.action is None:
raise FirewallError(errors.INVALID_RULE, "no element, no action")
if self.source is None and self.destination is None:
raise FirewallError(errors.INVALID_RULE, "no element, no source, no destination")
if type(self.element) not in [ Rich_IcmpBlock,
Rich_ForwardPort,
Rich_Masquerade ]:
if self.log is None and self.audit is None and \
self.action is None:
raise FirewallError(errors.INVALID_RULE, "no action, no log, no audit")
# source
if self.source is not None:
if self.source.addr is not None:
if self.family is None:
raise FirewallError(errors.INVALID_FAMILY)
if self.source.mac is not None:
raise FirewallError(errors.INVALID_RULE, "address and mac")
if self.source.ipset is not None:
raise FirewallError(errors.INVALID_RULE, "address and ipset")
if not functions.check_address(self.family, self.source.addr):
raise FirewallError(errors.INVALID_ADDR, str(self.source.addr))
elif self.source.mac is not None:
if self.source.ipset is not None:
raise FirewallError(errors.INVALID_RULE, "mac and ipset")
if not functions.check_mac(self.source.mac):
raise FirewallError(errors.INVALID_MAC, str(self.source.mac))
elif self.source.ipset is not None:
if not check_ipset_name(self.source.ipset):
raise FirewallError(errors.INVALID_IPSET, str(self.source.ipset))
else:
raise FirewallError(errors.INVALID_RULE, "invalid source")
# destination
if self.destination is not None:
if self.family is None:
raise FirewallError(errors.INVALID_FAMILY)
if self.destination.addr is not None and self.destination.ipset is not None
raise FirewallError(errors.INVALID_RULE, "address and ipset")
if self.destination.ipset is None:
if self.destination.addr is None or not functions.check_address(self.family,
self.destination.addr)):
raise FirewallError(errors.INVALID_ADDR, str(self.destination.addr))
else:
if not check_ipset_name(self.destination.ipset):
raise FirewallError(errors.INVALID_IPSET, str(self.destination.ipset))
# service
if type(self.element) == Rich_Service:
# service availability needs to be checked in Firewall, here is no
# knowledge about this, therefore only simple check
if self.element.name is None or len(self.element.name) < 1:
raise FirewallError(errors.INVALID_SERVICE, str(self.element.name))
# port
elif type(self.element) == Rich_Port:
if not functions.check_port(self.element.port):
raise FirewallError(errors.INVALID_PORT, self.element.port)
if self.element.protocol not in [ "tcp", "udp", "sctp", "dccp" ]:
raise FirewallError(errors.INVALID_PROTOCOL, self.element.protocol)
# protocol
elif type(self.element) == Rich_Protocol:
if not functions.checkProtocol(self.element.value):
raise FirewallError(errors.INVALID_PROTOCOL, self.element.value)
# masquerade
elif type(self.element) == Rich_Masquerade:
if self.action is not None:
raise FirewallError(errors.INVALID_RULE, "masquerade and action")
if self.source is not None and self.source.mac is not None:
raise FirewallError(errors.INVALID_RULE, "masquerade and mac source")
# icmp-block
elif type(self.element) == Rich_IcmpBlock:
# icmp type availability needs to be checked in Firewall, here is no
# knowledge about this, therefore only simple check
if self.element.name is None or len(self.element.name) < 1:
raise FirewallError(errors.INVALID_ICMPTYPE, str(self.element.name))
if self.action:
raise FirewallError(errors.INVALID_RULE, "icmp-block and action")
# icmp-type
elif type(self.element) == Rich_IcmpType:
# icmp type availability needs to be checked in Firewall, here is no
# knowledge about this, therefore only simple check
if self.element.name is None or len(self.element.name) < 1:
raise FirewallError(errors.INVALID_ICMPTYPE, str(self.element.name))
# forward-port
elif type(self.element) == Rich_ForwardPort:
if not functions.check_port(self.element.port):
raise FirewallError(errors.INVALID_PORT, self.element.port)
if self.element.protocol not in [ "tcp", "udp", "sctp", "dccp" ]:
raise FirewallError(errors.INVALID_PROTOCOL, self.element.protocol)
if self.element.to_port == "" and self.element.to_address == "":
raise FirewallError(errors.INVALID_PORT, self.element.to_port)
if self.element.to_port != "" and \
not functions.check_port(self.element.to_port):
raise FirewallError(errors.INVALID_PORT, self.element.to_port)
if self.element.to_address != "" and \
not functions.check_single_address(self.family,
self.element.to_address):
raise FirewallError(errors.INVALID_ADDR, self.element.to_address)
if self.family is None:
raise FirewallError(errors.INVALID_FAMILY)
if self.action is not None:
raise FirewallError(errors.INVALID_RULE, "forward-port and action")
def check(self):
if self.family is not None and self.family not in ["ipv4", "ipv6"]:
raise FirewallError(errors.INVALID_FAMILY, self.family)
if self.family is None:
if (self.source is not None and self.source.addr is not None) or \
self.destination is not None:
raise FirewallError(errors.MISSING_FAMILY)
if type(self.element) == Rich_ForwardPort:
raise FirewallError(errors.MISSING_FAMILY)
if self.element is None:
if self.action is None:
raise FirewallError(errors.INVALID_RULE,
"no element, no action")
if self.source is None:
raise FirewallError(errors.INVALID_RULE,
"no element, no source")
if self.destination is not None:
raise FirewallError(errors.INVALID_RULE, "destination action")
if type(self.element) not in [
Rich_IcmpBlock, Rich_ForwardPort, Rich_Masquerade
]:
if self.log is None and self.audit is None and \
self.action is None:
raise FirewallError(errors.INVALID_RULE,
"no action, no log, no audit")
# source
if self.source is not None:
if self.source.addr is not None:
if self.family is None:
raise FirewallError(errors.INVALID_FAMILY)
if self.source.mac is not None:
raise FirewallError(errors.INVALID_RULE, "address and mac")
if not functions.check_address(self.family, self.source.addr):
raise FirewallError(errors.INVALID_ADDR,
str(self.source.addr))
elif self.source.mac is not None:
if not functions.check_mac(self.source.mac):
raise FirewallError(errors.INVALID_MAC,
str(self.source.mac))
elif self.source.ipset is not None:
if not check_ipset_name(self.source.ipset):
raise FirewallError(errors.INVALID_IPSET,
str(self.source.ipset))
else:
raise FirewallError(errors.INVALID_RULE, "invalid source")
# destination
if self.destination is not None:
if self.family is None:
raise FirewallError(errors.INVALID_FAMILY)
if self.destination.addr is None or \
not functions.check_address(self.family,
self.destination.addr):
raise FirewallError(errors.INVALID_ADDR,
str(self.destination.addr))
# service
if type(self.element) == Rich_Service:
# service availability needs to be checked in Firewall, here is no
# knowledge about this, therefore only simple check
if self.element.name is None or len(self.element.name) < 1:
raise FirewallError(errors.INVALID_SERVICE,
str(self.element.name))
# port
elif type(self.element) == Rich_Port:
if not functions.check_port(self.element.port):
raise FirewallError(errors.INVALID_PORT, self.element.port)
if self.element.protocol not in ["tcp", "udp"]:
raise FirewallError(errors.INVALID_PROTOCOL,
self.element.protocol)
# protocol
elif type(self.element) == Rich_Protocol:
if not functions.checkProtocol(self.element.value):
raise FirewallError(errors.INVALID_PROTOCOL,
self.element.value)
# masquerade
elif type(self.element) == Rich_Masquerade:
if self.action is not None:
raise FirewallError(errors.INVALID_RULE,
"masquerade and action")
if self.source is not None and self.source.mac is not None:
raise FirewallError(errors.INVALID_RULE,
"masquerade and mac source")
# icmp-block
elif type(self.element) == Rich_IcmpBlock:
# icmp type availability needs to be checked in Firewall, here is no
# knowledge about this, therefore only simple check
if self.element.name is None or len(self.element.name) < 1:
raise FirewallError(errors.INVALID_ICMPTYPE,
str(self.element.name))
if self.action:
raise FirewallError(errors.INVALID_RULE,
"icmp-block and action")
# forward-port
elif type(self.element) == Rich_ForwardPort:
if not functions.check_port(self.element.port):
raise FirewallError(errors.INVALID_PORT, self.element.port)
if self.element.protocol not in ["tcp", "udp"]:
raise FirewallError(errors.INVALID_PROTOCOL,
self.element.protocol)
if self.element.to_port == "" and self.element.to_address == "":
raise FirewallError(errors.INVALID_PORT, self.element.to_port)
if self.element.to_port != "" and \
not functions.check_port(self.element.to_port):
raise FirewallError(errors.INVALID_PORT, self.element.to_port)
if self.element.to_address != "" and \
not functions.check_single_address(self.family,
self.element.to_address):
raise FirewallError(errors.INVALID_ADDR,
self.element.to_address)
if self.family is None:
raise FirewallError(errors.INVALID_FAMILY)
if self.action is not None:
raise FirewallError(errors.INVALID_RULE,
"forward-port and action")
# other element and not empty?
elif self.element is not None:
raise FirewallError(errors.INVALID_RULE,
"Unknown element %s" % type(self.element))
# log
if self.log is not None:
if self.log.level and \
self.log.level not in [ "emerg", "alert", "crit", "error",
"warning", "notice", "info", "debug" ]:
raise FirewallError(errors.INVALID_LOG_LEVEL, self.log.level)
if self.log.limit is not None:
self.log.limit.check()
# audit
if self.audit is not None:
if type(self.action) not in [Rich_Accept, Rich_Reject, Rich_Drop]:
raise FirewallError(errors.INVALID_AUDIT_TYPE,
type(self.action))
if self.audit.limit is not None:
self.audit.limit.check()
# action
if self.action is not None:
if type(self.action) == Rich_Reject:
self.action.check(self.family)
elif type(self.action) == Rich_Mark:
self.action.check()
if self.action.limit is not None:
self.action.limit.check()
def check_entry(entry, options, ipset_type):
family = "ipv4"
if "family" in options:
if options["family"] == "inet6":
family = "ipv6"
if not ipset_type.startswith("hash:"):
raise FirewallError(errors.INVALID_IPSET,
"ipset type '%s' not usable" % ipset_type)
flags = ipset_type[5:].split(",")
items = entry.split(",")
if len(flags) != len(items) or len(flags) < 1:
raise FirewallError(
errors.INVALID_ENTRY,
"entry '%s' does not match ipset type '%s'" % \
(entry, ipset_type))
for i in range(len(flags)):
flag = flags[i]
item = items[i]
if flag == "ip":
if "-" in item and family == "ipv4":
# IP ranges only with plain IPs, no masks
if i > 1:
raise FirewallError(
errors.INVALID_ENTRY,
"invalid address '%s' in '%s'[%d]" % \
(item, entry, i))
splits = item.split("-")
if len(splits) != 2:
raise FirewallError(
errors.INVALID_ENTRY,
"invalid address range '%s' in '%s' for %s (%s)" % \
(item, entry, ipset_type, family))
for _split in splits:
if (family == "ipv4" and not checkIP(_split)) or \
(family == "ipv6" and not checkIP6(_split)):
raise FirewallError(
errors.INVALID_ENTRY,
"invalid address '%s' in '%s' for %s (%s)" % \
(_split, entry, ipset_type, family))
else:
# IPs with mask only allowed in the first
# position of the type
if family == "ipv4":
if item == "0.0.0.0":
raise FirewallError(
errors.INVALID_ENTRY,
"invalid address '%s' in '%s' for %s (%s)" % \
(item, entry, ipset_type, family))
if i == 0:
ip_check = checkIPnMask
else:
ip_check = checkIP
else:
ip_check = checkIP6
if not ip_check(item):
raise FirewallError(
errors.INVALID_ENTRY,
"invalid address '%s' in '%s' for %s (%s)" % \
(item, entry, ipset_type, family))
elif flag == "net":
if "-" in item:
# IP ranges only with plain IPs, no masks
splits = item.split("-")
if len(splits) != 2:
raise FirewallError(
errors.INVALID_ENTRY,
"invalid address range '%s' in '%s' for %s (%s)" % \
(item, entry, ipset_type, family))
# First part can only be a plain IP
if (family == "ipv4" and not checkIP(splits[0])) or \
(family == "ipv6" and not checkIP6(splits[0])):
raise FirewallError(
errors.INVALID_ENTRY,
"invalid address '%s' in '%s' for %s (%s)" % \
(splits[0], entry, ipset_type, family))
# Second part can also have a mask
if (family == "ipv4" and not checkIPnMask(splits[1])) or \
(family == "ipv6" and not checkIP6nMask(splits[1])):
raise FirewallError(
errors.INVALID_ENTRY,
"invalid address '%s' in '%s' for %s (%s)" % \
(splits[1], entry, ipset_type, family))
else:
# IPs with mask allowed in all positions, but no /0
if item.endswith("/0"):
if not (family == "ipv6" and i == 0 and
ipset_type == "hash:net,iface"):
raise FirewallError(
errors.INVALID_ENTRY,
"invalid address '%s' in '%s' for %s (%s)" % \
(item, entry, ipset_type, family))
if (family == "ipv4" and not checkIPnMask(item)) or \
(family == "ipv6" and not checkIP6nMask(item)):
raise FirewallError(
errors.INVALID_ENTRY,
"invalid address '%s' in '%s' for %s (%s)" % \
(item, entry, ipset_type, family))
elif flag == "mac":
# ipset does not allow to add 00:00:00:00:00:00
if not check_mac(item) or item == "00:00:00:00:00:00":
raise FirewallError(
errors.INVALID_ENTRY,
"invalid mac address '%s' in '%s'" % (item, entry))
elif flag == "port":
if ":" in item:
splits = item.split(":")
if len(splits) != 2:
raise FirewallError(
errors.INVALID_ENTRY,
"invalid port '%s'" % (item))
if splits[0] == "icmp":
if family != "ipv4":
raise FirewallError(
errors.INVALID_ENTRY,
"invalid protocol for family '%s' in '%s'" % \
(family, entry))
if not check_icmp_name(splits[1]) and not \
check_icmp_type(splits[1]):
raise FirewallError(
errors.INVALID_ENTRY,
"invalid icmp type '%s' in '%s'" % \
(splits[1], entry))
elif splits[0] in [ "icmpv6", "ipv6-icmp" ]:
if family != "ipv6":
raise FirewallError(
errors.INVALID_ENTRY,
"invalid protocol for family '%s' in '%s'" % \
(family, entry))
if not check_icmpv6_name(splits[1]) and not \
check_icmpv6_type(splits[1]):
raise FirewallError(
errors.INVALID_ENTRY,
"invalid icmpv6 type '%s' in '%s'" % \
(splits[1], entry))
elif splits[0] not in [ "tcp", "sctp", "udp", "udplite" ] \
and not checkProtocol(splits[0]):
raise FirewallError(
errors.INVALID_ENTRY,
"invalid protocol '%s' in '%s'" % (splits[0],
entry))
elif not check_port(splits[1]):
raise FirewallError(
errors.INVALID_ENTRY,
"invalid port '%s'in '%s'" % (splits[1], entry))
else:
if not check_port(item):
raise FirewallError(
errors.INVALID_ENTRY,
"invalid port '%s' in '%s'" % (item, entry))
elif flag == "mark":
if item.startswith("0x"):
try:
int_val = int(item, 16)
except ValueError:
raise FirewallError(
errors.INVALID_ENTRY,
"invalid mark '%s' in '%s'" % (item, entry))
else:
try:
int_val = int(item)
except ValueError:
raise FirewallError(
errors.INVALID_ENTRY,
"invalid mark '%s' in '%s'" % (item, entry))
if int_val < 0 or int_val > 4294967295:
raise FirewallError(
errors.INVALID_ENTRY,
"invalid mark '%s' in '%s'" % (item, entry))
elif flag == "iface":
if not checkInterface(item) or len(item) > 15:
raise FirewallError(
errors.INVALID_ENTRY,
"invalid interface '%s' in '%s'" % (item, entry))
else:
raise FirewallError(errors.INVALID_IPSET,
"ipset type '%s' not usable" % ipset_type)
def check(self):
if self.family is not None and self.family not in ["ipv4", "ipv6"]:
raise FirewallError(errors.INVALID_FAMILY, self.family)
if self.family is None:
if (self.source is not None and self.source.addr is not None) or \
self.destination is not None:
raise FirewallError(errors.MISSING_FAMILY)
if type(self.element) == Rich_ForwardPort:
raise FirewallError(errors.MISSING_FAMILY)
if self.priority < self.priority_min or self.priority > self.priority_max:
raise FirewallError(errors.INVALID_PRIORITY, "'priority' attribute must be between %d and %d." \
% (self.priority_min, self.priority_max))
if self.element is None and \
(self.log is None or (self.log is not None and self.priority == 0)):
if self.action is None:
raise FirewallError(errors.INVALID_RULE,
"no element, no action")
if self.source is None and self.destination is None and self.priority == 0:
raise FirewallError(errors.INVALID_RULE,
"no element, no source, no destination")
if type(self.element) not in [
Rich_IcmpBlock, Rich_ForwardPort, Rich_Masquerade,
Rich_Tcp_Mss_Clamp
]:
if self.log is None and self.audit is None and \
self.action is None:
raise FirewallError(errors.INVALID_RULE,
"no action, no log, no audit")
# source
if self.source is not None:
if self.source.addr is not None:
if self.family is None:
raise FirewallError(errors.INVALID_FAMILY)
if self.source.mac is not None:
raise FirewallError(errors.INVALID_RULE, "address and mac")
if self.source.ipset is not None:
raise FirewallError(errors.INVALID_RULE,
"address and ipset")
if not functions.check_address(self.family, self.source.addr):
raise FirewallError(errors.INVALID_ADDR,
str(self.source.addr))
elif self.source.mac is not None:
if self.source.ipset is not None:
raise FirewallError(errors.INVALID_RULE, "mac and ipset")
if not functions.check_mac(self.source.mac):
raise FirewallError(errors.INVALID_MAC,
str(self.source.mac))
elif self.source.ipset is not None:
if not check_ipset_name(self.source.ipset):
raise FirewallError(errors.INVALID_IPSET,
str(self.source.ipset))
else:
raise FirewallError(errors.INVALID_RULE, "invalid source")
# destination
if self.destination is not None:
if self.destination.addr is not None:
if self.family is None:
raise FirewallError(errors.INVALID_FAMILY)
if self.destination.ipset is not None:
raise FirewallError(errors.INVALID_DESTINATION,
"address and ipset")
if not functions.check_address(self.family,
self.destination.addr):
raise FirewallError(errors.INVALID_ADDR,
str(self.destination.addr))
elif self.destination.ipset is not None:
if not check_ipset_name(self.destination.ipset):
raise FirewallError(errors.INVALID_IPSET,
str(self.destination.ipset))
else:
raise FirewallError(errors.INVALID_RULE, "invalid destination")
# service
if type(self.element) == Rich_Service:
# service availability needs to be checked in Firewall, here is no
# knowledge about this, therefore only simple check
if self.element.name is None or len(self.element.name) < 1:
raise FirewallError(errors.INVALID_SERVICE,
str(self.element.name))
# port
elif type(self.element) == Rich_Port:
if not functions.check_port(self.element.port):
raise FirewallError(errors.INVALID_PORT, self.element.port)
if self.element.protocol not in ["tcp", "udp", "sctp", "dccp"]:
raise FirewallError(errors.INVALID_PROTOCOL,
self.element.protocol)
# protocol
elif type(self.element) == Rich_Protocol:
if not functions.checkProtocol(self.element.value):
raise FirewallError(errors.INVALID_PROTOCOL,
self.element.value)
# masquerade
elif type(self.element) == Rich_Masquerade:
if self.action is not None:
raise FirewallError(errors.INVALID_RULE,
"masquerade and action")
if self.source is not None and self.source.mac is not None:
raise FirewallError(errors.INVALID_RULE,
"masquerade and mac source")
# icmp-block
elif type(self.element) == Rich_IcmpBlock:
# icmp type availability needs to be checked in Firewall, here is no
# knowledge about this, therefore only simple check
if self.element.name is None or len(self.element.name) < 1:
raise FirewallError(errors.INVALID_ICMPTYPE,
str(self.element.name))
if self.action:
raise FirewallError(errors.INVALID_RULE,
"icmp-block and action")
# icmp-type
elif type(self.element) == Rich_IcmpType:
# icmp type availability needs to be checked in Firewall, here is no
# knowledge about this, therefore only simple check
if self.element.name is None or len(self.element.name) < 1:
raise FirewallError(errors.INVALID_ICMPTYPE,
str(self.element.name))
# forward-port
elif type(self.element) == Rich_ForwardPort:
if not functions.check_port(self.element.port):
raise FirewallError(errors.INVALID_PORT, self.element.port)
if self.element.protocol not in ["tcp", "udp", "sctp", "dccp"]:
raise FirewallError(errors.INVALID_PROTOCOL,
self.element.protocol)
if self.element.to_port == "" and self.element.to_address == "":
raise FirewallError(errors.INVALID_PORT, self.element.to_port)
if self.element.to_port != "" and \
not functions.check_port(self.element.to_port):
raise FirewallError(errors.INVALID_PORT, self.element.to_port)
if self.element.to_address != "" and \
not functions.check_single_address(self.family,
self.element.to_address):
raise FirewallError(errors.INVALID_ADDR,
self.element.to_address)
if self.family is None:
raise FirewallError(errors.INVALID_FAMILY)
if self.action is not None:
raise FirewallError(errors.INVALID_RULE,
"forward-port and action")
# source-port
elif type(self.element) == Rich_SourcePort:
if not functions.check_port(self.element.port):
raise FirewallError(errors.INVALID_PORT, self.element.port)
if self.element.protocol not in ["tcp", "udp", "sctp", "dccp"]:
raise FirewallError(errors.INVALID_PROTOCOL,
self.element.protocol)
# tcp-mss-clamp
elif type(self.element) == Rich_Tcp_Mss_Clamp:
if self.action is not None:
raise FirewallError(
errors.INVALID_RULE,
"tcp-mss-clamp and %s are mutually exclusive" %
self.action)
if self.element.value:
if not functions.checkTcpMssClamp(self.element.value):
raise FirewallError(errors.INVALID_RULE,
self.element.value)
# other element and not empty?
elif self.element is not None:
raise FirewallError(errors.INVALID_RULE,
"Unknown element %s" % type(self.element))
# log
if self.log is not None:
self.log.check()
# audit
if self.audit is not None:
if type(self.action) not in [Rich_Accept, Rich_Reject, Rich_Drop]:
raise FirewallError(errors.INVALID_AUDIT_TYPE,
type(self.action))
if self.audit.limit is not None:
self.audit.limit.check()
# action
if self.action is not None:
if type(self.action) == Rich_Reject:
self.action.check(self.family)
elif type(self.action) == Rich_Mark:
self.action.check()
if self.action.limit is not None:
self.action.limit.check()
def query_source(self, zone, source):
if check_mac(source):
source = source.upper()
return self.__source_id(source) in self.get_zone(zone).sources
def startElement(self, name, attrs):
IO_Object_ContentHandler.startElement(self, name, attrs)
if self._rule_error:
return
self.item.parser_check_element_attrs(name, attrs)
if name == "zone":
if "name" in attrs:
log.warning("Ignoring deprecated attribute name='%s'",
attrs["name"])
if "version" in attrs:
self.item.version = attrs["version"]
if "immutable" in attrs:
log.warning("Ignoring deprecated attribute immutable='%s'",
attrs["immutable"])
if "target" in attrs:
target = attrs["target"]
if target not in ZONE_TARGETS:
raise FirewallError(errors.INVALID_TARGET, target)
if target != "" and target != DEFAULT_ZONE_TARGET:
self.item.target = target
elif name == "short":
pass
elif name == "description":
pass
elif name == "service":
if self._rule:
if self._rule.element:
log.warning(
"Invalid rule: More than one element in rule '%s', ignoring.",
str(self._rule))
self._rule_error = True
return
self._rule.element = rich.Rich_Service(attrs["name"])
return
if attrs["name"] not in self.item.services:
self.item.services.append(attrs["name"])
else:
log.warning("Service '%s' already set, ignoring.",
attrs["name"])
elif name == "port":
if self._rule:
if self._rule.element:
log.warning(
"Invalid rule: More than one element in rule '%s', ignoring.",
str(self._rule))
self._rule_error = True
return
self._rule.element = rich.Rich_Port(attrs["port"],
attrs["protocol"])
return
check_port(attrs["port"])
check_tcpudp(attrs["protocol"])
entry = (portStr(attrs["port"], "-"), attrs["protocol"])
if entry not in self.item.ports:
self.item.ports.append(entry)
else:
log.warning("Port '%s/%s' already set, ignoring.",
attrs["port"], attrs["protocol"])
elif name == "protocol":
if self._rule:
if self._rule.element:
log.warning(
"Invalid rule: More than one element in rule '%s', ignoring.",
str(self._rule))
self._rule_error = True
return
self._rule.element = rich.Rich_Protocol(attrs["value"])
else:
check_protocol(attrs["value"])
if attrs["value"] not in self.item.protocols:
self.item.protocols.append(attrs["value"])
else:
log.warning("Protocol '%s' already set, ignoring.",
attrs["value"])
elif name == "icmp-block":
if self._rule:
if self._rule.element:
log.warning(
"Invalid rule: More than one element in rule '%s', ignoring.",
str(self._rule))
self._rule_error = True
return
self._rule.element = rich.Rich_IcmpBlock(attrs["name"])
return
if attrs["name"] not in self.item.icmp_blocks:
self.item.icmp_blocks.append(attrs["name"])
else:
log.warning("icmp-block '%s' already set, ignoring.",
attrs["name"])
elif name == "icmp-type":
if self._rule:
if self._rule.element:
log.warning(
"Invalid rule: More than one element in rule '%s', ignoring.",
str(self._rule))
self._rule_error = True
return
self._rule.element = rich.Rich_IcmpType(attrs["name"])
return
else:
log.warning("Invalid rule: icmp-block '%s' outside of rule",
attrs["name"])
elif name == "masquerade":
if "enabled" in attrs and \
attrs["enabled"].lower() in [ "no", "false" ] :
log.warning("Ignoring deprecated attribute enabled='%s'",
attrs["enabled"])
return
if self._rule:
if self._rule.element:
log.warning(
"Invalid rule: More than one element in rule '%s', ignoring.",
str(self._rule))
self._rule_error = True
return
self._rule.element = rich.Rich_Masquerade()
else:
if self.item.masquerade:
log.warning("Masquerade already set, ignoring.")
else:
self.item.masquerade = True
elif name == "forward-port":
to_port = ""
if "to-port" in attrs:
to_port = attrs["to-port"]
to_addr = ""
if "to-addr" in attrs:
to_addr = attrs["to-addr"]
if self._rule:
if self._rule.element:
log.warning(
"Invalid rule: More than one element in rule '%s', ignoring.",
str(self._rule))
self._rule_error = True
return
self._rule.element = rich.Rich_ForwardPort(
attrs["port"], attrs["protocol"], to_port, to_addr)
return
check_port(attrs["port"])
check_tcpudp(attrs["protocol"])
if to_port:
check_port(to_port)
if to_addr:
if not checkIP(to_addr) and not checkIP6(to_addr):
raise FirewallError(errors.INVALID_ADDR,
"to-addr '%s' is not a valid address" \
% to_addr)
entry = (portStr(attrs["port"], "-"), attrs["protocol"],
portStr(to_port, "-"), str(to_addr))
if entry not in self.item.forward_ports:
self.item.forward_ports.append(entry)
else:
log.warning("Forward port %s/%s%s%s already set, ignoring.",
attrs["port"], attrs["protocol"],
" >%s" % to_port if to_port else "",
" @%s" % to_addr if to_addr else "")
elif name == "source-port":
if self._rule:
if self._rule.element:
log.warning(
"Invalid rule: More than one element in rule '%s', ignoring.",
str(self._rule))
self._rule_error = True
return
self._rule.element = rich.Rich_SourcePort(
attrs["port"], attrs["protocol"])
return
check_port(attrs["port"])
check_tcpudp(attrs["protocol"])
entry = (portStr(attrs["port"], "-"), attrs["protocol"])
if entry not in self.item.source_ports:
self.item.source_ports.append(entry)
else:
log.warning("Source port '%s/%s' already set, ignoring.",
attrs["port"], attrs["protocol"])
elif name == "interface":
if self._rule:
log.warning('Invalid rule: interface use in rule.')
self._rule_error = True
return
# zone bound to interface
if "name" not in attrs:
log.warning('Invalid interface: Name missing.')
self._rule_error = True
return
if attrs["name"] not in self.item.interfaces:
self.item.interfaces.append(attrs["name"])
else:
log.warning("Interface '%s' already set, ignoring.",
attrs["name"])
elif name == "source":
if self._rule:
if self._rule.source:
log.warning(
"Invalid rule: More than one source in rule '%s', ignoring.",
str(self._rule))
self._rule_error = True
return
invert = False
if "invert" in attrs and \
attrs["invert"].lower() in [ "yes", "true" ]:
invert = True
addr = mac = ipset = None
if "address" in attrs:
addr = attrs["address"]
if "mac" in attrs:
mac = attrs["mac"]
if "ipset" in attrs:
ipset = attrs["ipset"]
self._rule.source = rich.Rich_Source(addr,
mac,
ipset,
invert=invert)
return
# zone bound to source
if "address" not in attrs and "ipset" not in attrs:
log.warning('Invalid source: No address no ipset.')
return
if "address" in attrs and "ipset" in attrs:
log.warning('Invalid source: Address and ipset.')
return
if "family" in attrs:
log.warning("Ignoring deprecated attribute family='%s'",
attrs["family"])
if "invert" in attrs:
log.warning('Invalid source: Invertion not allowed here.')
return
if "address" in attrs:
if not checkIPnMask(attrs["address"]) and \
not checkIP6nMask(attrs["address"]) and \
not check_mac(attrs["address"]):
raise FirewallError(errors.INVALID_ADDR, attrs["address"])
if "ipset" in attrs:
entry = "ipset:%s" % attrs["ipset"]
if entry not in self.item.sources:
self.item.sources.append(entry)
else:
log.warning("Source '%s' already set, ignoring.",
attrs["address"])
if "address" in attrs:
entry = attrs["address"]
if entry not in self.item.sources:
self.item.sources.append(entry)
else:
log.warning("Source '%s' already set, ignoring.",
attrs["address"])
elif name == "destination":
if not self._rule:
log.warning('Invalid rule: Destination outside of rule')
self._rule_error = True
return
if self._rule.destination:
log.warning(
"Invalid rule: More than one destination in rule '%s', ignoring.",
str(self._rule))
return
invert = False
if "invert" in attrs and \
attrs["invert"].lower() in [ "yes", "true" ]:
invert = True
self._rule.destination = rich.Rich_Destination(
attrs["address"], invert)
elif name in ["accept", "reject", "drop", "mark"]:
if not self._rule:
log.warning('Invalid rule: Action outside of rule')
self._rule_error = True
return
if self._rule.action:
log.warning('Invalid rule: More than one action')
self._rule_error = True
return
if name == "accept":
self._rule.action = rich.Rich_Accept()
elif name == "reject":
_type = None
if "type" in attrs:
_type = attrs["type"]
self._rule.action = rich.Rich_Reject(_type)
elif name == "drop":
self._rule.action = rich.Rich_Drop()
elif name == "mark":
_set = attrs["set"]
self._rule.action = rich.Rich_Mark(_set)
self._limit_ok = self._rule.action
elif name == "log":
if not self._rule:
log.warning('Invalid rule: Log outside of rule')
return
if self._rule.log:
log.warning('Invalid rule: More than one log')
return
level = None
if "level" in attrs:
level = attrs["level"]
if level not in [
"emerg", "alert", "crit", "error", "warning", "notice",
"info", "debug"
]:
log.warning('Invalid rule: Invalid log level')
self._rule_error = True
return
prefix = attrs["prefix"] if "prefix" in attrs else None
self._rule.log = rich.Rich_Log(prefix, level)
self._limit_ok = self._rule.log
elif name == "audit":
if not self._rule:
log.warning('Invalid rule: Audit outside of rule')
return
if self._rule.audit:
log.warning(
"Invalid rule: More than one audit in rule '%s', ignoring.",
str(self._rule))
self._rule_error = True
return
self._rule.audit = rich.Rich_Audit()
self._limit_ok = self._rule.audit
elif name == "rule":
family = None
if "family" in attrs:
family = attrs["family"]
if family not in ["ipv4", "ipv6"]:
log.warning('Invalid rule: Rule family "%s" invalid',
attrs["family"])
self._rule_error = True
return
self._rule = rich.Rich_Rule(family)
elif name == "limit":
if not self._limit_ok:
log.warning(
'Invalid rule: Limit outside of action, log and audit')
self._rule_error = True
return
if self._limit_ok.limit:
log.warning(
"Invalid rule: More than one limit in rule '%s', ignoring.",
str(self._rule))
self._rule_error = True
return
value = attrs["value"]
self._limit_ok.limit = rich.Rich_Limit(value)
elif name == "icmp-block-inversion":
if self.item.icmp_block_inversion:
log.warning("Icmp-Block-Inversion already set, ignoring.")
else:
self.item.icmp_block_inversion = True
else:
log.warning("Unknown XML element '%s'", name)
return
def check(self):
if self.family is not None and self.family not in [ "ipv4", "ipv6" ]:
raise FirewallError(INVALID_FAMILY, self.family)
if self.family is None:
if (self.source is not None and self.source.addr is not None) or \
self.destination is not None:
raise FirewallError(MISSING_FAMILY)
if type(self.element) == Rich_ForwardPort:
raise FirewallError(MISSING_FAMILY)
if self.element is None:
if self.action is None:
raise FirewallError(INVALID_RULE, "no element, no action")
if self.source is None:
raise FirewallError(INVALID_RULE, "no element, no source")
if self.destination is not None:
raise FirewallError(INVALID_RULE, "destination action")
if type(self.element) not in [ Rich_IcmpBlock,
Rich_ForwardPort,
Rich_Masquerade ]:
if self.log is None and self.audit is None and \
self.action is None:
raise FirewallError(INVALID_RULE, "no action, no log, no audit")
# source
if self.source is not None:
if self.source.addr is not None:
if self.family is None:
raise FirewallError(INVALID_FAMILY)
if self.source.mac is not None:
raise FirewallError(INVALID_RULE, "address and mac")
if not functions.check_address(self.family, self.source.addr):
raise FirewallError(INVALID_ADDR, str(self.source.addr))
elif self.source.mac is not None:
if not functions.check_mac(self.source.mac):
raise FirewallError(INVALID_MAC, str(self.source.mac))
elif self.source.ipset is not None:
if not functions.check_ipset(self.source.ipset):
raise FirewallError(INVALID_IPSET, str(self.source.ipset))
else:
raise FirewallError(INVALID_RULE, "invalid source")
# destination
if self.destination is not None:
if self.family is None:
raise FirewallError(INVALID_FAMILY)
if self.destination.addr is None or \
not functions.check_address(self.family,
self.destination.addr):
raise FirewallError(INVALID_ADDR, str(self.destination.addr))
# service
if type(self.element) == Rich_Service:
# service availability needs to be checked in Firewall, here is no
# knowledge about this, therefore only simple check
if self.element.name is None or len(self.element.name) < 1:
raise FirewallError(INVALID_SERVICE, str(self.element.name))
# port
elif type(self.element) == Rich_Port:
if not functions.check_port(self.element.port):
raise FirewallError(INVALID_PORT, self.element.port)
if self.element.protocol not in [ "tcp", "udp" ]:
raise FirewallError(INVALID_PROTOCOL, self.element.protocol)
# protocol
elif type(self.element) == Rich_Protocol:
if not functions.checkProtocol(self.element.value):
raise FirewallError(INVALID_PROTOCOL, self.element.value)
# masquerade
elif type(self.element) == Rich_Masquerade:
if self.action is not None:
raise FirewallError(INVALID_RULE, "masquerade and action")
if self.source is not None and self.source.mac is not None:
raise FirewallError(INVALID_RULE, "masquerade and mac source")
# icmp-block
elif type(self.element) == Rich_IcmpBlock:
# icmp type availability needs to be checked in Firewall, here is no
# knowledge about this, therefore only simple check
if self.element.name is None or len(self.element.name) < 1:
raise FirewallError(INVALID_ICMPTYPE, str(self.element.name))
if self.action:
raise FirewallError(INVALID_RULE, "icmp-block and action")
# forward-port
elif type(self.element) == Rich_ForwardPort:
if not functions.check_port(self.element.port):
raise FirewallError(INVALID_PORT, self.element.port)
if self.element.protocol not in [ "tcp", "udp" ]:
raise FirewallError(INVALID_PROTOCOL, self.element.protocol)
if self.element.to_port == "" and self.element.to_address == "":
raise FirewallError(INVALID_PORT, self.element.to_port)
if self.element.to_port != "" and \
not functions.check_port(self.element.to_port):
raise FirewallError(INVALID_PORT, self.element.to_port)
if self.element.to_address != "" and \
not functions.check_single_address(self.family,
self.element.to_address):
raise FirewallError(INVALID_ADDR, self.element.to_address)
if self.family is None:
raise FirewallError(INVALID_FAMILY)
if self.action is not None:
raise FirewallError(INVALID_RULE, "forward-port and action")
# other element and not empty?
elif self.element is not None:
raise FirewallError(INVALID_RULE, "Unknown element %s" %
type(self.element))
# log
if self.log is not None:
if self.log.level and \
self.log.level not in [ "emerg", "alert", "crit", "error",
"warning", "notice", "info", "debug" ]:
raise FirewallError(INVALID_LOG_LEVEL, self.log.level)
if self.log.limit is not None:
self.log.limit.check()
# audit
if self.audit is not None:
if type(self.action) not in [ Rich_Accept, Rich_Reject, Rich_Drop ]:
raise FirewallError(INVALID_AUDIT_TYPE, type(self.action))
if self.audit.limit is not None:
self.audit.limit.check()
# action
if self.action is not None:
if type(self.action) == Rich_Reject:
self.action.check(self.family)
if self.action.limit is not None:
self.action.limit.check()
def startElement(self, name, attrs):
IO_Object_ContentHandler.startElement(self, name, attrs)
if self._rule_error:
return
self.item.parser_check_element_attrs(name, attrs)
if common_startElement(self, name, attrs):
return
elif name == "zone":
if "name" in attrs:
log.warning("Ignoring deprecated attribute name='%s'",
attrs["name"])
if "version" in attrs:
self.item.version = attrs["version"]
if "immutable" in attrs:
log.warning("Ignoring deprecated attribute immutable='%s'",
attrs["immutable"])
if "target" in attrs:
target = attrs["target"]
if target not in ZONE_TARGETS:
raise FirewallError(errors.INVALID_TARGET, target)
if target != "" and target != DEFAULT_ZONE_TARGET:
self.item.target = target
elif name == "forward":
if self.item.forward:
log.warning("Forward already set, ignoring.")
else:
self.item.forward = True
elif name == "interface":
if self._rule:
log.warning('Invalid rule: interface use in rule.')
self._rule_error = True
return
# zone bound to interface
if "name" not in attrs:
log.warning('Invalid interface: Name missing.')
self._rule_error = True
return
if attrs["name"] not in self.item.interfaces:
self.item.interfaces.append(attrs["name"])
else:
log.warning("Interface '%s' already set, ignoring.",
attrs["name"])
elif name == "source":
if self._rule:
if self._rule.source:
log.warning(
"Invalid rule: More than one source in rule '%s', ignoring.",
str(self._rule))
self._rule_error = True
return
invert = False
if "invert" in attrs and \
attrs["invert"].lower() in [ "yes", "true" ]:
invert = True
addr = mac = ipset = None
if "address" in attrs:
addr = attrs["address"]
if "mac" in attrs:
mac = attrs["mac"]
if "ipset" in attrs:
ipset = attrs["ipset"]
self._rule.source = rich.Rich_Source(addr,
mac,
ipset,
invert=invert)
return
# zone bound to source
if "address" not in attrs and "ipset" not in attrs:
log.warning('Invalid source: No address no ipset.')
return
if "address" in attrs and "ipset" in attrs:
log.warning('Invalid source: Address and ipset.')
return
if "family" in attrs:
log.warning("Ignoring deprecated attribute family='%s'",
attrs["family"])
if "invert" in attrs:
log.warning('Invalid source: Invertion not allowed here.')
return
if "address" in attrs:
if not checkIPnMask(attrs["address"]) and \
not checkIP6nMask(attrs["address"]) and \
not check_mac(attrs["address"]):
raise FirewallError(errors.INVALID_ADDR, attrs["address"])
if "ipset" in attrs:
entry = "ipset:%s" % attrs["ipset"]
if entry not in self.item.sources:
self.item.sources.append(entry)
else:
log.warning("Source '%s' already set, ignoring.",
attrs["address"])
if "address" in attrs:
entry = attrs["address"]
if entry not in self.item.sources:
self.item.sources.append(entry)
else:
log.warning("Source '%s' already set, ignoring.",
attrs["address"])
elif name == "icmp-block-inversion":
if self.item.icmp_block_inversion:
log.warning("Icmp-Block-Inversion already set, ignoring.")
else:
self.item.icmp_block_inversion = True
else:
log.warning("Unknown XML element '%s'", name)
return
def check_entry(entry, options, ipset_type):
family = "ipv4"
if "family" in options:
if options["family"] == "inet6":
family = "ipv6"
if not ipset_type.startswith("hash:"):
raise FirewallError(errors.INVALID_IPSET,
"ipset type '%s' not usable" % ipset_type)
flags = ipset_type[5:].split(",")
items = entry.split(",")
if len(flags) != len(items) or len(flags) < 1:
raise FirewallError(
errors.INVALID_ENTRY,
"entry '%s' does not match ipset type '%s'" % \
(entry, ipset_type))
for i in range(len(flags)):
flag = flags[i]
item = items[i]
if flag == "ip":
if "-" in item and family == "ipv4":
# IP ranges only with plain IPs, no masks
if i > 1:
raise FirewallError(
errors.INVALID_ENTRY,
"invalid address '%s' in '%s'[%d]" % \
(item, entry, i))
splits = item.split("-")
if len(splits) != 2:
raise FirewallError(
errors.INVALID_ENTRY,
"invalid address range '%s' in '%s' for %s (%s)" % \
(item, entry, ipset_type, family))
for _split in splits:
if (family == "ipv4" and not checkIP(_split)) or \
(family == "ipv6" and not checkIP6(_split)):
raise FirewallError(
errors.INVALID_ENTRY,
"invalid address '%s' in '%s' for %s (%s)" % \
(_split, entry, ipset_type, family))
else:
# IPs with mask only allowed in the first
# position of the type
if family == "ipv4":
if item == "0.0.0.0":
raise FirewallError(
errors.INVALID_ENTRY,
"invalid address '%s' in '%s' for %s (%s)" % \
(item, entry, ipset_type, family))
if i == 0:
ip_check = checkIPnMask
else:
ip_check = checkIP
else:
ip_check = checkIP6
if not ip_check(item):
raise FirewallError(
errors.INVALID_ENTRY,
"invalid address '%s' in '%s' for %s (%s)" % \
(item, entry, ipset_type, family))
elif flag == "net":
if "-" in item:
# IP ranges only with plain IPs, no masks
splits = item.split("-")
if len(splits) != 2:
raise FirewallError(
errors.INVALID_ENTRY,
"invalid address range '%s' in '%s' for %s (%s)" % \
(item, entry, ipset_type, family))
# First part can only be a plain IP
if (family == "ipv4" and not checkIP(splits[0])) or \
(family == "ipv6" and not checkIP6(splits[0])):
raise FirewallError(
errors.INVALID_ENTRY,
"invalid address '%s' in '%s' for %s (%s)" % \
(splits[0], entry, ipset_type, family))
# Second part can also have a mask
if (family == "ipv4" and not checkIPnMask(splits[1])) or \
(family == "ipv6" and not checkIP6nMask(splits[1])):
raise FirewallError(
errors.INVALID_ENTRY,
"invalid address '%s' in '%s' for %s (%s)" % \
(splits[1], entry, ipset_type, family))
else:
# IPs with mask allowed in all positions, but no /0
if item.endswith("/0"):
if not (family == "ipv6" and i == 0 and
ipset_type == "hash:net,iface"):
raise FirewallError(
errors.INVALID_ENTRY,
"invalid address '%s' in '%s' for %s (%s)" % \
(item, entry, ipset_type, family))
if (family == "ipv4" and not checkIPnMask(item)) or \
(family == "ipv6" and not checkIP6nMask(item)):
raise FirewallError(
errors.INVALID_ENTRY,
"invalid address '%s' in '%s' for %s (%s)" % \
(item, entry, ipset_type, family))
elif flag == "mac":
# ipset does not allow to add 00:00:00:00:00:00
if not check_mac(item) or item == "00:00:00:00:00:00":
raise FirewallError(
errors.INVALID_ENTRY,
"invalid mac address '%s' in '%s'" % (item, entry))
elif flag == "port":
if ":" in item:
splits = item.split(":")
if len(splits) != 2:
raise FirewallError(
errors.INVALID_ENTRY,
"invalid port '%s'" % (item))
if splits[0] == "icmp":
if family != "ipv4":
raise FirewallError(
errors.INVALID_ENTRY,
"invalid protocol for family '%s' in '%s'" % \
(family, entry))
if not check_icmp_name(splits[1]) and not \
check_icmp_type(splits[1]):
raise FirewallError(
errors.INVALID_ENTRY,
"invalid icmp type '%s' in '%s'" % \
(splits[1], entry))
elif splits[0] in [ "icmpv6", "ipv6-icmp" ]:
if family != "ipv6":
raise FirewallError(
errors.INVALID_ENTRY,
"invalid protocol for family '%s' in '%s'" % \
(family, entry))
if not check_icmpv6_name(splits[1]) and not \
check_icmpv6_type(splits[1]):
raise FirewallError(
errors.INVALID_ENTRY,
"invalid icmpv6 type '%s' in '%s'" % \
(splits[1], entry))
elif splits[0] not in [ "tcp", "sctp", "udp", "udplite" ] \
and not checkProtocol(splits[0]):
raise FirewallError(
errors.INVALID_ENTRY,
"invalid protocol '%s' in '%s'" % (splits[0],
entry))
elif not check_port(splits[1]):
raise FirewallError(
errors.INVALID_ENTRY,
"invalid port '%s'in '%s'" % (splits[1], entry))
else:
if not check_port(item):
raise FirewallError(
errors.INVALID_ENTRY,
"invalid port '%s' in '%s'" % (item, entry))
elif flag == "mark":
if item.startswith("0x"):
try:
int_val = int(item, 16)
except ValueError:
raise FirewallError(
errors.INVALID_ENTRY,
"invalid mark '%s' in '%s'" % (item, entry))
else:
try:
int_val = int(item)
except ValueError:
raise FirewallError(
errors.INVALID_ENTRY,
"invalid mark '%s' in '%s'" % (item, entry))
if int_val < 0 or int_val > 4294967295:
raise FirewallError(
errors.INVALID_ENTRY,
"invalid mark '%s' in '%s'" % (item, entry))
elif flag == "iface":
if not checkInterface(item) or len(item) > 15:
raise FirewallError(
errors.INVALID_ENTRY,
"invalid interface '%s' in '%s'" % (item, entry))
else:
raise FirewallError(errors.INVALID_IPSET,
"ipset type '%s' not usable" % ipset_type)
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 startElement(self, name, attrs):
IO_Object_ContentHandler.startElement(self, name)
if self._rule_error:
return
self.item.parser_check_element_attrs(name, attrs)
if name == "zone":
if "name" in attrs:
log.warning("Ignoring deprecated attribute name='%s'",
attrs["name"])
if "version" in attrs:
self.item.version = attrs["version"]
if "immutable" in attrs:
log.warning("Ignoring deprecated attribute immutable='%s'",
attrs["immutable"])
if "target" in attrs:
target = attrs["target"]
if target not in ZONE_TARGETS:
raise FirewallError(INVALID_TARGET, target)
if target != "" and target != DEFAULT_ZONE_TARGET:
self.item.target = target
elif name == "short":
pass
elif name == "description":
pass
elif name == "service":
if self._rule:
if self._rule.element:
log.warning("Invalid rule: More than one element in rule '%s', ignoring.",
str(self._rule))
self._rule_error = True
return
self._rule.element = Rich_Service(attrs["name"])
return
if attrs["name"] not in self.item.services:
self.item.services.append(attrs["name"])
else:
log.warning("Service '%s' already set, ignoring.",
attrs["name"])
elif name == "port":
if self._rule:
if self._rule.element:
log.warning("Invalid rule: More than one element in rule '%s', ignoring.",
str(self._rule))
self._rule_error = True
return
self._rule.element = Rich_Port(attrs["port"],
attrs["protocol"])
return
check_port(attrs["port"])
check_tcpudp(attrs["protocol"])
entry = (portStr(attrs["port"], "-"), attrs["protocol"])
if entry not in self.item.ports:
self.item.ports.append(entry)
else:
log.warning("Port '%s/%s' already set, ignoring.",
attrs["port"], attrs["protocol"])
elif name == "protocol":
if self._rule:
if self._rule.element:
log.warning("Invalid rule: More than one element in rule '%s', ignoring.",
str(self._rule))
self._rule_error = True
return
self._rule.element = Rich_Protocol(attrs["value"])
else:
check_protocol(attrs["value"])
if attrs["value"] not in self.item.protocols:
self.item.protocols.append(attrs["value"])
else:
log.warning("Protocol '%s' already set, ignoring.",
attrs["value"])
elif name == "icmp-block":
if self._rule:
if self._rule.element:
log.warning("Invalid rule: More than one element in rule '%s', ignoring.",
str(self._rule))
self._rule_error = True
return
self._rule.element = Rich_IcmpBlock(attrs["name"])
return
if attrs["name"] not in self.item.icmp_blocks:
self.item.icmp_blocks.append(attrs["name"])
else:
log.warning("icmp-block '%s' already set, ignoring.",
attrs["name"])
elif name == "masquerade":
if "enabled" in attrs:
log.warning("Ignoring deprecated attribute enabled='%s'",
attrs["enabled"])
if self._rule:
if self._rule.element:
log.warning("Invalid rule: More than one element in rule '%s', ignoring.",
str(self._rule))
self._rule_error = True
return
self._rule.element = Rich_Masquerade()
else:
if self.item.masquerade:
log.warning("Masquerade already set, ignoring.")
else:
self.item.masquerade = True
elif name == "forward-port":
to_port = ""
if "to-port" in attrs:
to_port = attrs["to-port"]
to_addr = ""
if "to-addr" in attrs:
to_addr = attrs["to-addr"]
if self._rule:
if self._rule.element:
log.warning("Invalid rule: More than one element in rule '%s', ignoring.",
str(self._rule))
self._rule_error = True
return
self._rule.element = Rich_ForwardPort(attrs["port"],
attrs["protocol"],
to_port, to_addr)
return
check_port(attrs["port"])
check_tcpudp(attrs["protocol"])
if to_port:
check_port(to_port)
if to_addr:
if not checkIP(to_addr):
raise FirewallError(INVALID_ADDR,
"to-addr '%s' is not a valid address" \
% to_addr)
entry = (portStr(attrs["port"], "-"), attrs["protocol"],
portStr(to_port, "-"), str(to_addr))
if entry not in self.item.forward_ports:
self.item.forward_ports.append(entry)
else:
log.warning("Forward port %s/%s%s%s already set, ignoring.",
attrs["port"], attrs["protocol"],
" >%s" % to_port if to_port else "",
" @%s" % to_addr if to_addr else "")
elif name == "interface":
if self._rule:
log.warning('Invalid rule: interface use in rule.')
self._rule_error = True
return
# zone bound to interface
if "name" not in attrs:
log.warning('Invalid interface: Name missing.')
self._rule_error = True
return
attrs["name"]
if attrs["name"] not in self.item.interfaces:
self.item.interfaces.append(attrs["name"])
else:
log.warning("Interface '%s' already set, ignoring.",
attrs["name"])
elif name == "source":
if self._rule:
if self._rule.source:
log.warning("Invalid rule: More than one source in rule '%s', ignoring.",
str(self._rule))
self._rule_error = True
return
invert = False
if "invert" in attrs and \
attrs["invert"].lower() in [ "yes", "true" ]:
invert = True
addr = mac = ipset = None
if "address" in attrs:
addr = attrs["address"]
if "mac" in attrs:
mac = attrs["mac"]
if "ipset" in attrs:
ipset = attrs["ipset"]
self._rule.source = Rich_Source(addr, mac, ipset, invert=invert)
return
# zone bound to source
if "address" not in attrs and not "ipset" in attrs:
log.warning('Invalid source: No address no ipset.')
return
if "address" in attrs and "ipset" in attrs:
log.warning('Invalid source: Address and ipset.')
return
if "family" in attrs:
log.warning("Ignoring deprecated attribute family='%s'",
attrs["family"])
if "invert" in attrs:
log.warning('Invalid source: Invertion not allowed here.')
return
if "address" in attrs:
if not checkIPnMask(attrs["address"]) and \
not checkIP6nMask(attrs["address"]) and \
not check_mac(attrs["address"]):
raise FirewallError(INVALID_ADDR, source)
if "ipset" in attrs:
entry = "ipset:%s" % attrs["ipset"]
if entry not in self.item.sources:
self.item.sources.append(entry)
else:
log.warning("Source '%s' already set, ignoring.",
attrs["address"])
if "address" in attrs:
entry = attrs["address"]
if entry not in self.item.sources:
self.item.sources.append(entry)
else:
log.warning("Source '%s' already set, ignoring.",
attrs["address"])
elif name == "destination":
if not self._rule:
log.warning('Invalid rule: Destination outside of rule')
self._rule_error = True
return
if self._rule.destination:
log.warning("Invalid rule: More than one destination in rule '%s', ignoring.",
str(self._rule))
return
invert = False
if "invert" in attrs and \
attrs["invert"].lower() in [ "yes", "true" ]:
invert = True
self._rule.destination = Rich_Destination(attrs["address"],
invert)
elif name in [ "accept", "reject", "drop", "mark" ]:
if not self._rule:
log.warning('Invalid rule: Action outside of rule')
self._rule_error = True
return
if self._rule.action:
log.warning('Invalid rule: More than one action')
self._rule_error = True
return
if name == "accept":
self._rule.action = Rich_Accept()
elif name == "reject":
_type = None
if "type" in attrs:
_type = attrs["type"]
self._rule.action = Rich_Reject(_type)
elif name == "drop":
self._rule.action = Rich_Drop()
elif name == "mark":
_set = attrs["set"]
self._rule.action = Rich_Mark(_set)
self._limit_ok = self._rule.action
elif name == "log":
if not self._rule:
log.warning('Invalid rule: Log outside of rule')
return
if self._rule.log:
log.warning('Invalid rule: More than one log')
return
level = None
if "level" in attrs:
level = attrs["level"]
if level not in [ "emerg", "alert", "crit", "error",
"warning", "notice", "info", "debug" ]:
log.warning('Invalid rule: Invalid log level')
self._rule_error = True
return
prefix = attrs["prefix"] if "prefix" in attrs else None
self._rule.log = Rich_Log(prefix, level)
self._limit_ok = self._rule.log
elif name == "audit":
if not self._rule:
log.warning('Invalid rule: Audit outside of rule')
return
if self._rule.audit:
log.warning("Invalid rule: More than one audit in rule '%s', ignoring.",
str(self._rule))
self._rule_error = True
return
self._rule.audit = Rich_Audit()
self._limit_ok = self._rule.audit
elif name == "rule":
family = None
if "family" in attrs:
family = attrs["family"]
if family not in [ "ipv4", "ipv6" ]:
log.warning('Invalid rule: Rule family "%s" invalid',
attrs["family"])
self._rule_error = True
return
self._rule = Rich_Rule(family)
elif name == "limit":
if not self._limit_ok:
log.warning('Invalid rule: Limit outside of action, log and audit')
self._rule_error = True
return
if self._limit_ok.limit:
log.warning("Invalid rule: More than one limit in rule '%s', ignoring.",
str(self._rule))
self._rule_error = True
return
value = attrs["value"]
self._limit_ok.limit = Rich_Limit(value)
else:
log.warning("Unknown XML element '%s'", name)
return