5f7efbf47c
implements bp quantum-security-groups-iptables-ovs - Adding [SECURITYGROUP] firewall_driver to the conf - Adding NoopFirewallDriver - Adding OVSHybridIptablesFirewallDriver - Refactoring security group code to support OVS plugin Change-Id: I7aabc296265afc47d938121543ace57cce6cc521
136 lines
3.9 KiB
Python
136 lines
3.9 KiB
Python
# 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
|
|
|
|
|
|
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,
|
|
Note: source_group_ip in REST API should be converted by this rule
|
|
if direction is ingress:
|
|
source_group_ip will be a soruce_prefix_ip
|
|
if direction is egress:
|
|
source_group_ip will be a dest_prefix_ip
|
|
Note: source_group_id in REST API should be converted by this rule
|
|
if direction is ingress:
|
|
source_group_id will be a list of soruce_prefix_ip
|
|
if direction is egress:
|
|
source_group_id will be a list of dest_prefix_ip
|
|
"""
|
|
|
|
__metaclass__ = abc.ABCMeta
|
|
|
|
def prepare_port_filter(self, port):
|
|
"""Prepare filters for the port.
|
|
|
|
This method should be called before the port is created.
|
|
"""
|
|
raise NotImplementedError()
|
|
|
|
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()
|
|
|
|
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()
|
|
|
|
def remove_port_filter(self, port):
|
|
"""Stop filtering port"""
|
|
raise NotImplementedError()
|
|
|
|
def filter_defer_apply_on(self):
|
|
"""Defer application of filtering rule"""
|
|
pass
|
|
|
|
def filter_defer_apply_off(self):
|
|
"""Turn off deferral of rules and apply the rules now"""
|
|
pass
|
|
|
|
@property
|
|
def ports(self):
|
|
""" returns filterd ports"""
|
|
pass
|
|
|
|
@contextlib.contextmanager
|
|
def defer_apply(self):
|
|
"""defer apply context"""
|
|
self.filter_defer_apply_on()
|
|
try:
|
|
yield
|
|
finally:
|
|
self.filter_defer_apply_off()
|
|
|
|
|
|
class NoopFirewallDriver(FirewallDriver):
|
|
""" Noop Firewall Driver.
|
|
|
|
Firewall driver which does nothing.
|
|
This driver is for disabling the firewall functionality.
|
|
"""
|
|
|
|
def prepare_port_filter(self, port):
|
|
pass
|
|
|
|
def apply_port_filter(self, port):
|
|
pass
|
|
|
|
def update_port_filter(self, port):
|
|
pass
|
|
|
|
def remove_port_filter(self, port):
|
|
pass
|
|
|
|
def filter_defer_apply_on(self):
|
|
pass
|
|
|
|
def filter_defer_apply_off(self):
|
|
pass
|
|
|
|
@property
|
|
def ports(self):
|
|
return {}
|