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# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright 2010 United States Government as represented by the
# Administrator of the National Aeronautics and Space Administration.
# Copyright 2011 Piston Cloud Computing, Inc.
# Copyright 2012 Red Hat, Inc.
# Copyright 2013 Nicira, 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.
#
# @author: Aaron Rosen, Nicira Networks, Inc.
import urllib
from oslo.config import cfg
from nova import exception
from nova import utils
CONF = cfg.CONF
class SecurityGroupBase(object):
def parse_cidr(self, cidr):
if cidr:
try:
cidr = urllib.unquote(cidr).decode()
except Exception as e:
self.raise_invalid_cidr(cidr, e)
if not utils.is_valid_cidr(cidr):
self.raise_invalid_cidr(cidr)
return cidr
else:
return '0.0.0.0/0'
@staticmethod
def new_group_ingress_rule(grantee_group_id, protocol, from_port,
to_port):
return SecurityGroupBase._new_ingress_rule(
protocol, from_port, to_port, group_id=grantee_group_id)
@staticmethod
def new_cidr_ingress_rule(grantee_cidr, protocol, from_port, to_port):
return SecurityGroupBase._new_ingress_rule(
protocol, from_port, to_port, cidr=grantee_cidr)
@staticmethod
def _new_ingress_rule(ip_protocol, from_port, to_port,
group_id=None, cidr=None):
values = {}
if group_id:
values['group_id'] = group_id
# Open everything if an explicit port range or type/code are not
# specified, but only if a source group was specified.
ip_proto_upper = ip_protocol.upper() if ip_protocol else ''
if (ip_proto_upper == 'ICMP' and
from_port is None and to_port is None):
from_port = -1
to_port = -1
elif (ip_proto_upper in ['TCP', 'UDP'] and from_port is None
and to_port is None):
from_port = 1
to_port = 65535
elif cidr:
values['cidr'] = cidr
if ip_protocol and from_port is not None and to_port is not None:
ip_protocol = str(ip_protocol)
try:
# Verify integer conversions
from_port = int(from_port)
to_port = int(to_port)
except ValueError:
if ip_protocol.upper() == 'ICMP':
raise exception.InvalidInput(reason="Type and"
" Code must be integers for ICMP protocol type")
else:
raise exception.InvalidInput(reason="To and From ports "
"must be integers")
if ip_protocol.upper() not in ['TCP', 'UDP', 'ICMP']:
raise exception.InvalidIpProtocol(protocol=ip_protocol)
# Verify that from_port must always be less than
# or equal to to_port
if (ip_protocol.upper() in ['TCP', 'UDP'] and
(from_port > to_port)):
raise exception.InvalidPortRange(from_port=from_port,
to_port=to_port, msg="Former value cannot"
" be greater than the later")
# Verify valid TCP, UDP port ranges
if (ip_protocol.upper() in ['TCP', 'UDP'] and
(from_port < 1 or to_port > 65535)):
raise exception.InvalidPortRange(from_port=from_port,
to_port=to_port, msg="Valid TCP ports should"
" be between 1-65535")
# Verify ICMP type and code
if (ip_protocol.upper() == "ICMP" and
(from_port < -1 or from_port > 255 or
to_port < -1 or to_port > 255)):
raise exception.InvalidPortRange(from_port=from_port,
to_port=to_port, msg="For ICMP, the"
" type:code must be valid")
values['protocol'] = ip_protocol
values['from_port'] = from_port
values['to_port'] = to_port
else:
# If cidr based filtering, protocol and ports are mandatory
if cidr:
return None
return values
def create_security_group_rule(self, context, security_group, new_rule):
if self.rule_exists(security_group, new_rule):
msg = (_('This rule already exists in group %s') %
new_rule['parent_group_id'])
self.raise_group_already_exists(msg)
return self.add_rules(context, new_rule['parent_group_id'],
security_group['name'],
[new_rule])[0]
def rule_exists(self, security_group, new_rule):
"""Indicates whether the specified rule is already
defined in the given security group.
"""
for rule in security_group['rules']:
is_duplicate = True
keys = ('group_id', 'cidr', 'from_port', 'to_port', 'protocol')
for key in keys:
if rule.get(key) != new_rule.get(key):
is_duplicate = False
break
if is_duplicate:
return rule.get('id') or True
return False
def validate_property(self, value, property, allowed):
pass
def ensure_default(self, context):
pass
def trigger_handler(self, event, *args):
pass
def trigger_rules_refresh(self, context, id):
"""Called when a rule is added to or removed from a security_group."""
pass
def trigger_members_refresh(self, context, group_ids):
"""Called when a security group gains a new or loses a member.
Sends an update request to each compute node for each instance for
which this is relevant.
"""
pass
def populate_security_groups(self, instance, security_groups):
"""Called when populating the database for an instances
security groups."""
raise NotImplementedError()
def create_security_group(self, context, name, description):
raise NotImplementedError()
def get(self, context, name=None, id=None, map_exception=False):
raise NotImplementedError()
def list(self, context, names=None, ids=None, project=None,
search_opts=None):
raise NotImplementedError()
def destroy(self, context, security_group):
raise NotImplementedError()
def add_rules(self, context, id, name, vals):
raise NotImplementedError()
def remove_rules(self, context, security_group, rule_ids):
raise NotImplementedError()
def get_rule(self, context, id):
raise NotImplementedError()
def get_instance_security_groups(self, req, instance_id):
raise NotImplementedError()
def add_to_instance(self, context, instance, security_group_name):
raise NotImplementedError()
def remove_from_instance(self, context, instance, security_group_name):
raise NotImplementedError()
@staticmethod
def raise_invalid_property(msg):
raise NotImplementedError()
@staticmethod
def raise_group_already_exists(msg):
raise NotImplementedError()
@staticmethod
def raise_invalid_group(msg):
raise NotImplementedError()
@staticmethod
def raise_invalid_cidr(cidr, decoding_exception=None):
raise NotImplementedError()
@staticmethod
def raise_over_quota(msg):
raise NotImplementedError()
@staticmethod
def raise_not_found(msg):
raise NotImplementedError()
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