59 lines
1.9 KiB
Python
59 lines
1.9 KiB
Python
# Copyright (C) 2011 Nippon Telegraph and Telephone Corporation.
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# Copyright (C) 2011 Isaku Yamahata <yamahata at valinux co jp>
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import logging
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from ryu.exception import MacAddressDuplicated
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from ryu.lib.mac import haddr_to_str
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LOG = logging.getLogger('ryu.controller.mac_to_network')
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class MacToNetwork(object):
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def __init__(self, nw):
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super(MacToNetwork, self).__init__()
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self.mac_to_net = {}
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self.dpid = {}
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self.nw = nw
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def get_network(self, mac, default=None):
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return self.mac_to_net.get(mac, default)
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def add_mac(self, mac, nw_id, nw_id_external=None):
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_nw_id = self.mac_to_net.get(mac)
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if _nw_id == nw_id:
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return
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# allow changing from nw_id_external to known nw id
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if _nw_id is None or _nw_id == nw_id_external:
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self.mac_to_net[mac] = nw_id
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LOG.debug('overwrite nw_id: mac %s nw old %s new %s',
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haddr_to_str(mac), _nw_id, nw_id)
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return
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if nw_id == nw_id_external:
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# this can happens when the packet traverses
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# VM-> tap-> ovs-> ext-port-> wire-> ext-port-> ovs-> tap-> VM
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return
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LOG.warning('duplicated nw_id: mac %s nw old %s new %s',
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haddr_to_str(mac), _nw_id, nw_id)
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raise MacAddressDuplicated(mac=mac)
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def del_mac(self, mac):
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del self.mac_to_net[mac]
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