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# Copyright (C) 2011 Nippon Telegraph and Telephone Corporation.
# Copyright (C) 2011 Isaku Yamahata <yamahata at valinux co jp>
#
# 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 logging
from os_ken.exception import MacAddressDuplicated
from os_ken.lib.mac import haddr_to_str
LOG = logging.getLogger('os_ken.controller.mac_to_network')
class MacToNetwork(object):
def __init__(self, nw):
super(MacToNetwork, self).__init__()
self.mac_to_net = {}
self.dpid = {}
self.nw = nw
def get_network(self, mac, default=None):
return self.mac_to_net.get(mac, default)
def add_mac(self, mac, nw_id, nw_id_external=None):
_nw_id = self.mac_to_net.get(mac)
if _nw_id == nw_id:
return
# allow changing from nw_id_external to known nw id
if _nw_id is None or _nw_id == nw_id_external:
self.mac_to_net[mac] = nw_id
LOG.debug('overwrite nw_id: mac %s nw old %s new %s',
haddr_to_str(mac), _nw_id, nw_id)
return
if nw_id == nw_id_external:
# this can happens when the packet traverses
# VM-> tap-> ovs-> ext-port-> wire-> ext-port-> ovs-> tap-> VM
return
LOG.warning('duplicated nw_id: mac %s nw old %s new %s',
haddr_to_str(mac), _nw_id, nw_id)
raise MacAddressDuplicated(mac=mac)
def del_mac(self, mac):
del self.mac_to_net[mac]
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