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474 lines
27 KiB
474 lines
27 KiB
# -*- 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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Interface for Dynamips virtual ATM switch module ("atmsw").
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http://github.com/GNS3/dynamips/blob/master/README.hypervisor#L593
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"""
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import asyncio
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import re
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from .device import Device
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from ..nios.nio_udp import NIOUDP
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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 ATMSwitch(Device):
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"""
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Dynamips ATM switch.
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:param name: name for this switch
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:param node_id: Node instance identifier
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:param project: Project instance
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:param manager: Parent VM Manager
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:param hypervisor: Dynamips hypervisor instance
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"""
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def __init__(self, name, node_id, project, manager, mappings=None, hypervisor=None):
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super().__init__(name, node_id, project, manager, hypervisor)
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self._nios = {}
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self._active_mappings = {}
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self._mappings = {}
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if mappings:
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self._mappings = mappings
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def __json__(self):
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mappings = {}
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for source, destination in self._mappings.items():
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mappings[source] = destination
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return {"name": self.name,
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"node_id": self.id,
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"project_id": self.project.id,
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"mappings": mappings,
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"status": "started"}
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async def create(self):
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if self._hypervisor is None:
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module_workdir = self.project.module_working_directory(self.manager.module_name.lower())
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self._hypervisor = await self.manager.start_new_hypervisor(working_dir=module_workdir)
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await self._hypervisor.send('atmsw create "{}"'.format(self._name))
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log.info('ATM switch "{name}" [{id}] has been created'.format(name=self._name, id=self._id))
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self._hypervisor.devices.append(self)
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async def set_name(self, new_name):
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"""
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Renames this ATM switch.
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:param new_name: New name for this switch
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"""
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await self._hypervisor.send('atmsw rename "{name}" "{new_name}"'.format(name=self._name, new_name=new_name))
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log.info('ATM switch "{name}" [{id}]: renamed to "{new_name}"'.format(name=self._name,
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id=self._id,
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new_name=new_name))
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self._name = new_name
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@property
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def nios(self):
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"""
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Returns all the NIOs member of this ATM switch.
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:returns: nio list
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"""
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return self._nios
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@property
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def mappings(self):
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"""
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Returns port mappings
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:returns: mappings list
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"""
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return self._mappings
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@mappings.setter
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def mappings(self, mappings):
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"""
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Sets port mappings
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:param mappings: mappings list
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"""
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self._mappings = mappings
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async def close(self):
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for nio in self._nios.values():
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if nio:
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await nio.close()
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if self._hypervisor:
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try:
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await self._hypervisor.send('atmsw delete "{}"'.format(self._name))
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log.info('ATM switch "{name}" [{id}] has been deleted'.format(name=self._name, id=self._id))
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except DynamipsError:
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log.debug("Could not properly delete ATM switch {}".format(self._name))
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if self._hypervisor and self in self._hypervisor.devices:
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self._hypervisor.devices.remove(self)
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if self._hypervisor and not self._hypervisor.devices:
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await self.hypervisor.stop()
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self._hypervisor = None
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return True
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async def delete(self):
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"""
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Deletes this ATM switch.
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"""
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await self.close()
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def has_port(self, port):
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"""
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Checks if a port exists on this ATM switch.
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:returns: boolean
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"""
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if port in self._nios:
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return True
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return False
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async def add_nio(self, nio, port_number):
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"""
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Adds a NIO as new port on ATM switch.
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:param nio: NIO instance to add
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:param port_number: port to allocate for the NIO
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"""
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if port_number in self._nios:
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raise DynamipsError("Port {} isn't free".format(port_number))
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log.info('ATM switch "{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_number))
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self._nios[port_number] = nio
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await self.set_mappings(self._mappings)
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async def remove_nio(self, port_number):
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"""
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Removes the specified NIO as member of this ATM switch.
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:param port_number: allocated port number
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"""
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if port_number not in self._nios:
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raise DynamipsError("Port {} is not allocated".format(port_number))
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await self.stop_capture(port_number)
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# remove VCs mapped with the port
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for source, destination in self._active_mappings.copy().items():
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if len(source) == 3 and len(destination) == 3:
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# remove the virtual channels mapped with this port/nio
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source_port, source_vpi, source_vci = source
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destination_port, destination_vpi, destination_vci = destination
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if port_number == source_port:
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log.info('ATM switch "{name}" [{id}]: unmapping VCC between port {source_port} VPI {source_vpi} VCI {source_vci} and port {destination_port} VPI {destination_vpi} VCI {destination_vci}'.format(name=self._name,
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id=self._id,
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source_port=source_port,
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source_vpi=source_vpi,
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source_vci=source_vci,
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destination_port=destination_port,
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destination_vpi=destination_vpi,
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destination_vci=destination_vci))
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await self.unmap_pvc(source_port, source_vpi, source_vci, destination_port, destination_vpi, destination_vci)
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await self.unmap_pvc(destination_port, destination_vpi, destination_vci, source_port, source_vpi, source_vci)
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else:
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# remove the virtual paths mapped with this port/nio
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source_port, source_vpi = source
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destination_port, destination_vpi = destination
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if port_number == source_port:
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log.info('ATM switch "{name}" [{id}]: unmapping VPC between port {source_port} VPI {source_vpi} and port {destination_port} VPI {destination_vpi}'.format(name=self._name,
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id=self._id,
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source_port=source_port,
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source_vpi=source_vpi,
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destination_port=destination_port,
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destination_vpi=destination_vpi))
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await self.unmap_vp(source_port, source_vpi, destination_port, destination_vpi)
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await self.unmap_vp(destination_port, destination_vpi, source_port, source_vpi)
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nio = self._nios[port_number]
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if isinstance(nio, NIOUDP):
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self.manager.port_manager.release_udp_port(nio.lport, self._project)
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log.info('ATM switch "{name}" [{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_number))
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del self._nios[port_number]
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return nio
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def get_nio(self, port_number):
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"""
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Gets a port NIO binding.
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:param port_number: port number
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:returns: NIO instance
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"""
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if port_number not in self._nios:
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raise DynamipsError("Port {} is not allocated".format(port_number))
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nio = self._nios[port_number]
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if not nio:
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raise DynamipsError("Port {} is not connected".format(port_number))
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return nio
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async def set_mappings(self, mappings):
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"""
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Applies VC mappings
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:param mappings: mappings (dict)
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"""
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pvc_entry = re.compile(r"""^([0-9]*):([0-9]*):([0-9]*)$""")
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for source, destination in mappings.items():
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if not isinstance(source, str) or not isinstance(destination, str):
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raise DynamipsError("Invalid ATM mappings")
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match_source_pvc = pvc_entry.search(source)
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match_destination_pvc = pvc_entry.search(destination)
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if match_source_pvc and match_destination_pvc:
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# add the virtual channels
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source_port, source_vpi, source_vci = map(int, match_source_pvc.group(1, 2, 3))
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destination_port, destination_vpi, destination_vci = map(int, match_destination_pvc.group(1, 2, 3))
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if self.has_port(destination_port):
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if (source_port, source_vpi, source_vci) not in self._active_mappings and \
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(destination_port, destination_vpi, destination_vci) not in self._active_mappings:
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log.info('ATM switch "{name}" [{id}]: mapping VCC between port {source_port} VPI {source_vpi} VCI {source_vci} and port {destination_port} VPI {destination_vpi} VCI {destination_vci}'.format(name=self._name,
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id=self._id,
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source_port=source_port,
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source_vpi=source_vpi,
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source_vci=source_vci,
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destination_port=destination_port,
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destination_vpi=destination_vpi,
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destination_vci=destination_vci))
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await self.map_pvc(source_port, source_vpi, source_vci, destination_port, destination_vpi, destination_vci)
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await self.map_pvc(destination_port, destination_vpi, destination_vci, source_port, source_vpi, source_vci)
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else:
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# add the virtual paths
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source_port, source_vpi = map(int, source.split(':'))
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destination_port, destination_vpi = map(int, destination.split(':'))
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if self.has_port(destination_port):
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if (source_port, source_vpi) not in self._active_mappings and (destination_port, destination_vpi) not in self._active_mappings:
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log.info('ATM switch "{name}" [{id}]: mapping VPC between port {source_port} VPI {source_vpi} and port {destination_port} VPI {destination_vpi}'.format(name=self._name,
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id=self._id,
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source_port=source_port,
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source_vpi=source_vpi,
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destination_port=destination_port,
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destination_vpi=destination_vpi))
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await self.map_vp(source_port, source_vpi, destination_port, destination_vpi)
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await self.map_vp(destination_port, destination_vpi, source_port, source_vpi)
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async def map_vp(self, port1, vpi1, port2, vpi2):
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"""
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Creates a new Virtual Path connection.
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:param port1: input port
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:param vpi1: input vpi
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:param port2: output port
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:param vpi2: output vpi
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"""
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if port1 not in self._nios:
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return
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if port2 not in self._nios:
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return
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nio1 = self._nios[port1]
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nio2 = self._nios[port2]
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await self._hypervisor.send('atmsw create_vpc "{name}" {input_nio} {input_vpi} {output_nio} {output_vpi}'.format(name=self._name,
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input_nio=nio1,
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input_vpi=vpi1,
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output_nio=nio2,
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output_vpi=vpi2))
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log.info('ATM switch "{name}" [{id}]: VPC from port {port1} VPI {vpi1} to port {port2} VPI {vpi2} created'.format(name=self._name,
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id=self._id,
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port1=port1,
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vpi1=vpi1,
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port2=port2,
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vpi2=vpi2))
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self._active_mappings[(port1, vpi1)] = (port2, vpi2)
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async def unmap_vp(self, port1, vpi1, port2, vpi2):
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"""
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Deletes a new Virtual Path connection.
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:param port1: input port
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:param vpi1: input vpi
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:param port2: output port
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:param vpi2: output vpi
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"""
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if port1 not in self._nios:
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return
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if port2 not in self._nios:
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return
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nio1 = self._nios[port1]
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nio2 = self._nios[port2]
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await self._hypervisor.send('atmsw delete_vpc "{name}" {input_nio} {input_vpi} {output_nio} {output_vpi}'.format(name=self._name,
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input_nio=nio1,
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input_vpi=vpi1,
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output_nio=nio2,
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output_vpi=vpi2))
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log.info('ATM switch "{name}" [{id}]: VPC from port {port1} VPI {vpi1} to port {port2} VPI {vpi2} deleted'.format(name=self._name,
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id=self._id,
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port1=port1,
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vpi1=vpi1,
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port2=port2,
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vpi2=vpi2))
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del self._active_mappings[(port1, vpi1)]
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async def map_pvc(self, port1, vpi1, vci1, port2, vpi2, vci2):
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"""
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Creates a new Virtual Channel connection (unidirectional).
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:param port1: input port
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:param vpi1: input vpi
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:param vci1: input vci
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:param port2: output port
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:param vpi2: output vpi
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:param vci2: output vci
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"""
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if port1 not in self._nios:
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return
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if port2 not in self._nios:
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return
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nio1 = self._nios[port1]
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nio2 = self._nios[port2]
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await self._hypervisor.send('atmsw create_vcc "{name}" {input_nio} {input_vpi} {input_vci} {output_nio} {output_vpi} {output_vci}'.format(name=self._name,
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input_nio=nio1,
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input_vpi=vpi1,
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input_vci=vci1,
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output_nio=nio2,
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output_vpi=vpi2,
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output_vci=vci2))
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log.info('ATM switch "{name}" [{id}]: VCC from port {port1} VPI {vpi1} VCI {vci1} to port {port2} VPI {vpi2} VCI {vci2} created'.format(name=self._name,
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id=self._id,
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port1=port1,
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vpi1=vpi1,
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vci1=vci1,
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port2=port2,
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vpi2=vpi2,
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vci2=vci2))
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self._active_mappings[(port1, vpi1, vci1)] = (port2, vpi2, vci2)
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async def unmap_pvc(self, port1, vpi1, vci1, port2, vpi2, vci2):
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"""
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Deletes a new Virtual Channel connection (unidirectional).
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:param port1: input port
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:param vpi1: input vpi
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:param vci1: input vci
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:param port2: output port
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:param vpi2: output vpi
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:param vci2: output vci
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"""
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if port1 not in self._nios:
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return
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if port2 not in self._nios:
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return
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nio1 = self._nios[port1]
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nio2 = self._nios[port2]
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await self._hypervisor.send('atmsw delete_vcc "{name}" {input_nio} {input_vpi} {input_vci} {output_nio} {output_vpi} {output_vci}'.format(name=self._name,
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input_nio=nio1,
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input_vpi=vpi1,
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input_vci=vci1,
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output_nio=nio2,
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output_vpi=vpi2,
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output_vci=vci2))
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log.info('ATM switch "{name}" [{id}]: VCC from port {port1} VPI {vpi1} VCI {vci1} to port {port2} VPI {vpi2} VCI {vci2} deleted'.format(name=self._name,
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id=self._id,
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port1=port1,
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vpi1=vpi1,
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vci1=vci1,
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port2=port2,
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vpi2=vpi2,
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vci2=vci2))
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del self._active_mappings[(port1, vpi1, vci1)]
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async def start_capture(self, port_number, output_file, data_link_type="DLT_ATM_RFC1483"):
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"""
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Starts a packet capture.
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:param port_number: allocated port number
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:param output_file: PCAP destination file for the capture
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:param data_link_type: PCAP data link type (DLT_*), default is DLT_ATM_RFC1483
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"""
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nio = self.get_nio(port_number)
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data_link_type = data_link_type.lower()
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if data_link_type.startswith("dlt_"):
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data_link_type = data_link_type[4:]
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if nio.input_filter[0] is not None and nio.output_filter[0] is not None:
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raise DynamipsError("Port {} has already a filter applied".format(port_number))
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await nio.start_packet_capture(output_file, data_link_type)
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log.info('ATM switch "{name}" [{id}]: starting packet capture on port {port}'.format(name=self._name,
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id=self._id,
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port=port_number))
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async def stop_capture(self, port_number):
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"""
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Stops a packet capture.
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:param port_number: allocated port number
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"""
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nio = self.get_nio(port_number)
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if not nio.capturing:
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return
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await nio.stop_packet_capture()
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log.info('ATM switch "{name}" [{id}]: stopping packet capture on port {port}'.format(name=self._name,
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id=self._id,
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port=port_number))
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