¡@
OpenStack Study: firewall.py**** CubicPower OpenStack Study ****
# vim: tabstop=4 shiftwidth=4 softtabstop=4 # # Copyright 2012, Nachi Ueno, NTT MCL, Inc. # All Rights Reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); you may # not use this file except in compliance with the License. You may obtain # a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the # License for the specific language governing permissions and limitations # under the License. import abc import contextlib import six @six.add_metaclass(abc.ABCMeta)
**** CubicPower OpenStack Study **** class FirewallDriver(object): """Firewall Driver base class. Defines methods that any driver providing security groups and provider firewall functionality should implement. Note port attribute should have information of security group ids and security group rules. the dict of port should have device : interface name fixed_ips: ips of the device mac_address: mac_address of the device security_groups: [sgid, sgid] security_group_rules : [ rule, rule ] the rule must contain ethertype and direction the rule may contain security_group_id, protocol, port_min, port_max source_ip_prefix, source_port_min, source_port_max, dest_ip_prefix, and remote_group_id Note: source_group_ip in REST API should be converted by this rule if direction is ingress: remote_group_ip will be a source_ip_prefix if direction is egress: remote_group_ip will be a dest_ip_prefix Note: remote_group_id in REST API should be converted by this rule if direction is ingress: remote_group_id will be a list of source_ip_prefix if direction is egress: remote_group_id will be a list of dest_ip_prefix remote_group_id will also remaining membership update management """
**** CubicPower OpenStack Study **** def prepare_port_filter(self, port): """Prepare filters for the port. This method should be called before the port is created. """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def apply_port_filter(self, port): """Apply port filter. Once this method returns, the port should be firewalled appropriately. This method should as far as possible be a no-op. It's vastly preferred to get everything set up in prepare_port_filter. """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def update_port_filter(self, port): """Refresh security group rules from data store Gets called when an port gets added to or removed from the security group the port is a member of or if the group gains or looses a rule. """ raise NotImplementedError()
**** CubicPower OpenStack Study **** def remove_port_filter(self, port): """Stop filtering port.""" raise NotImplementedError()
**** CubicPower OpenStack Study **** def filter_defer_apply_on(self): """Defer application of filtering rule.""" pass
**** CubicPower OpenStack Study **** def filter_defer_apply_off(self): """Turn off deferral of rules and apply the rules now.""" pass @property
**** CubicPower OpenStack Study **** def ports(self): """Returns filtered ports.""" pass @contextlib.contextmanager
**** CubicPower OpenStack Study **** def defer_apply(self): """Defer apply context.""" self.filter_defer_apply_on() try: yield finally: self.filter_defer_apply_off()
**** CubicPower OpenStack Study **** class NoopFirewallDriver(FirewallDriver): """Noop Firewall Driver. Firewall driver which does nothing. This driver is for disabling the firewall functionality. """
**** CubicPower OpenStack Study **** def prepare_port_filter(self, port): pass
**** CubicPower OpenStack Study **** def apply_port_filter(self, port): pass
**** CubicPower OpenStack Study **** def update_port_filter(self, port): pass
**** CubicPower OpenStack Study **** def remove_port_filter(self, port): pass
**** CubicPower OpenStack Study **** def filter_defer_apply_on(self): pass
**** CubicPower OpenStack Study **** def filter_defer_apply_off(self): pass @property
**** CubicPower OpenStack Study **** def ports(self): return {}
|