mirror of
https://github.com/GNS3/gns3-server
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137 lines
4.1 KiB
Python
137 lines
4.1 KiB
Python
# -*- coding: utf-8 -*-
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#
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# Copyright (C) 2013 GNS3 Technologies Inc.
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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"""
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Hub object that uses the Bridge interface to create a hub with ports.
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"""
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from .bridge import Bridge
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from ..dynamips_error import DynamipsError
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import logging
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log = logging.getLogger(__name__)
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class Hub(Bridge):
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"""
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Dynamips hub (based on Bridge)
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:param hypervisor: Dynamips hypervisor instance
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:param name: name for this hub
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"""
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_instances = []
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def __init__(self, hypervisor, name):
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# find an instance identifier (0 < id <= 4096)
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self._id = 0
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for identifier in range(1, 4097):
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if identifier not in self._instances:
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self._id = identifier
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self._instances.append(self._id)
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break
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if self._id == 0:
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raise DynamipsError("Maximum number of instances reached")
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self._mapping = {}
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Bridge.__init__(self, hypervisor, name)
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log.info("Ethernet hub {name} [id={id}] has been created".format(name=self._name,
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id=self._id))
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@classmethod
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def reset(cls):
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"""
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Resets the instance count and the allocated instances list.
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"""
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cls._instances.clear()
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@property
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def id(self):
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"""
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Returns the unique ID for this Ethernet switch.
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:returns: id (integer)
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"""
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return self._id
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@property
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def mapping(self):
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"""
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Returns port mapping
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:returns: mapping list
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"""
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return self._mapping
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def delete(self):
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"""
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Deletes this hub.
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"""
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Bridge.delete(self)
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log.info("Ethernet hub {name} [id={id}] has been deleted".format(name=self._name,
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id=self._id))
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self._instances.remove(self._id)
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def add_nio(self, nio, port):
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"""
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Adds a NIO as new port on this hub.
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:param nio: NIO instance to add
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:param port: port to allocate for the NIO
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"""
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if port in self._mapping:
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raise DynamipsError("Port {} isn't free".format(port))
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Bridge.add_nio(self, nio)
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log.info("Ethernet hub {name} [id={id}]: NIO {nio} bound to port {port}".format(name=self._name,
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id=self._id,
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nio=nio,
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port=port))
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self._mapping[port] = nio
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def remove_nio(self, port):
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"""
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Removes the specified NIO as member of this hub.
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:param port: allocated port
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:returns: the NIO that was bound to the allocated port
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"""
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if port not in self._mapping:
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raise DynamipsError("Port {} is not allocated".format(port))
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nio = self._mapping[port]
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Bridge.remove_nio(self, nio)
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log.info("Ethernet switch {name} [id={id}]: NIO {nio} removed from port {port}".format(name=self._name,
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id=self._id,
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nio=nio,
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port=port))
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del self._mapping[port]
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return nio
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