99 lines
3.5 KiB
Python
99 lines
3.5 KiB
Python
# Copyright 2013 Cisco Systems, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""
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Common utilities and helper functions for Openstack Networking Plugins.
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"""
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from neutron.common import exceptions as n_exc
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from neutron.plugins.common import constants as p_const
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def is_valid_vlan_tag(vlan):
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return p_const.MIN_VLAN_TAG <= vlan <= p_const.MAX_VLAN_TAG
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def is_valid_gre_id(gre_id):
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return p_const.MIN_GRE_ID <= gre_id <= p_const.MAX_GRE_ID
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def is_valid_vxlan_vni(vni):
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return p_const.MIN_VXLAN_VNI <= vni <= p_const.MAX_VXLAN_VNI
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def verify_tunnel_range(tunnel_range, tunnel_type):
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"""Raise an exception for invalid tunnel range or malformed range."""
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mappings = {p_const.TYPE_GRE: is_valid_gre_id,
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p_const.TYPE_VXLAN: is_valid_vxlan_vni}
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if tunnel_type in mappings:
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for ident in tunnel_range:
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if not mappings[tunnel_type](ident):
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raise n_exc.NetworkTunnelRangeError(
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tunnel_range=tunnel_range,
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error=_("%(id)s is not a valid %(type)s identifier") %
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{'id': ident, 'type': tunnel_type})
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if tunnel_range[1] < tunnel_range[0]:
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raise n_exc.NetworkTunnelRangeError(
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tunnel_range=tunnel_range,
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error=_("End of tunnel range is less "
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"than start of tunnel range"))
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def verify_vlan_range(vlan_range):
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"""Raise an exception for invalid tags or malformed range."""
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for vlan_tag in vlan_range:
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if not is_valid_vlan_tag(vlan_tag):
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raise n_exc.NetworkVlanRangeError(
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vlan_range=vlan_range,
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error=_("%s is not a valid VLAN tag") % vlan_tag)
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if vlan_range[1] < vlan_range[0]:
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raise n_exc.NetworkVlanRangeError(
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vlan_range=vlan_range,
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error=_("End of VLAN range is less than start of VLAN range"))
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def parse_network_vlan_range(network_vlan_range):
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"""Interpret a string as network[:vlan_begin:vlan_end]."""
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entry = network_vlan_range.strip()
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if ':' in entry:
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try:
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network, vlan_min, vlan_max = entry.split(':')
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vlan_range = (int(vlan_min), int(vlan_max))
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except ValueError as ex:
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raise n_exc.NetworkVlanRangeError(vlan_range=entry, error=ex)
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if not network:
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raise n_exc.PhysicalNetworkNameError()
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verify_vlan_range(vlan_range)
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return network, vlan_range
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else:
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return entry, None
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def parse_network_vlan_ranges(network_vlan_ranges_cfg_entries):
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"""Interpret a list of strings as network[:vlan_begin:vlan_end] entries."""
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networks = {}
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for entry in network_vlan_ranges_cfg_entries:
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network, vlan_range = parse_network_vlan_range(entry)
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if vlan_range:
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networks.setdefault(network, []).append(vlan_range)
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else:
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networks.setdefault(network, [])
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return networks
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def in_pending_status(status):
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return status in (p_const.PENDING_CREATE,
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p_const.PENDING_UPDATE,
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p_const.PENDING_DELETE)
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