# -*- coding: utf-8 -*- # # Copyright (C) 2013 GNS3 Technologies Inc. # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see . """ Interface for Dynamips virtual ATM switch module ("atmsw"). http://github.com/GNS3/dynamips/blob/master/README.hypervisor#L593 """ import asyncio import re from .device import Device from ..nios.nio_udp import NIOUDP from ..dynamips_error import DynamipsError import logging log = logging.getLogger(__name__) class ATMSwitch(Device): """ Dynamips ATM switch. :param name: name for this switch :param node_id: Node instance identifier :param project: Project instance :param manager: Parent VM Manager :param hypervisor: Dynamips hypervisor instance """ def __init__(self, name, node_id, project, manager, mappings=None, hypervisor=None): super().__init__(name, node_id, project, manager, hypervisor) self._nios = {} self._active_mappings = {} self._mappings = {} if mappings: self._mappings = mappings def __json__(self): mappings = {} for source, destination in self._mappings.items(): mappings[source] = destination return {"name": self.name, "node_id": self.id, "project_id": self.project.id, "mappings": mappings, "status": "started"} async def create(self): if self._hypervisor is None: module_workdir = self.project.module_working_directory(self.manager.module_name.lower()) self._hypervisor = await self.manager.start_new_hypervisor(working_dir=module_workdir) await self._hypervisor.send('atmsw create "{}"'.format(self._name)) log.info('ATM switch "{name}" [{id}] has been created'.format(name=self._name, id=self._id)) self._hypervisor.devices.append(self) async def set_name(self, new_name): """ Renames this ATM switch. :param new_name: New name for this switch """ await self._hypervisor.send('atmsw rename "{name}" "{new_name}"'.format(name=self._name, new_name=new_name)) log.info('ATM switch "{name}" [{id}]: renamed to "{new_name}"'.format(name=self._name, id=self._id, new_name=new_name)) self._name = new_name @property def nios(self): """ Returns all the NIOs member of this ATM switch. :returns: nio list """ return self._nios @property def mappings(self): """ Returns port mappings :returns: mappings list """ return self._mappings @mappings.setter def mappings(self, mappings): """ Sets port mappings :param mappings: mappings list """ self._mappings = mappings async def close(self): for nio in self._nios.values(): if nio: await nio.close() if self._hypervisor: try: await self._hypervisor.send('atmsw delete "{}"'.format(self._name)) log.info('ATM switch "{name}" [{id}] has been deleted'.format(name=self._name, id=self._id)) except DynamipsError: log.debug("Could not properly delete ATM switch {}".format(self._name)) if self._hypervisor and self in self._hypervisor.devices: self._hypervisor.devices.remove(self) if self._hypervisor and not self._hypervisor.devices: await self.hypervisor.stop() self._hypervisor = None return True async def delete(self): """ Deletes this ATM switch. """ await self.close() def has_port(self, port): """ Checks if a port exists on this ATM switch. :returns: boolean """ if port in self._nios: return True return False async def add_nio(self, nio, port_number): """ Adds a NIO as new port on ATM switch. :param nio: NIO instance to add :param port_number: port to allocate for the NIO """ if port_number in self._nios: raise DynamipsError("Port {} isn't free".format(port_number)) log.info('ATM switch "{name}" [id={id}]: NIO {nio} bound to port {port}'.format(name=self._name, id=self._id, nio=nio, port=port_number)) self._nios[port_number] = nio await self.set_mappings(self._mappings) async def remove_nio(self, port_number): """ Removes the specified NIO as member of this ATM switch. :param port_number: allocated port number """ if port_number not in self._nios: raise DynamipsError("Port {} is not allocated".format(port_number)) await self.stop_capture(port_number) # remove VCs mapped with the port for source, destination in self._active_mappings.copy().items(): if len(source) == 3 and len(destination) == 3: # remove the virtual channels mapped with this port/nio source_port, source_vpi, source_vci = source destination_port, destination_vpi, destination_vci = destination if port_number == source_port: 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, id=self._id, source_port=source_port, source_vpi=source_vpi, source_vci=source_vci, destination_port=destination_port, destination_vpi=destination_vpi, destination_vci=destination_vci)) await self.unmap_pvc(source_port, source_vpi, source_vci, destination_port, destination_vpi, destination_vci) await self.unmap_pvc(destination_port, destination_vpi, destination_vci, source_port, source_vpi, source_vci) else: # remove the virtual paths mapped with this port/nio source_port, source_vpi = source destination_port, destination_vpi = destination if port_number == source_port: 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, id=self._id, source_port=source_port, source_vpi=source_vpi, destination_port=destination_port, destination_vpi=destination_vpi)) await self.unmap_vp(source_port, source_vpi, destination_port, destination_vpi) await self.unmap_vp(destination_port, destination_vpi, source_port, source_vpi) nio = self._nios[port_number] if isinstance(nio, NIOUDP): self.manager.port_manager.release_udp_port(nio.lport, self._project) log.info('ATM switch "{name}" [{id}]: NIO {nio} removed from port {port}'.format(name=self._name, id=self._id, nio=nio, port=port_number)) del self._nios[port_number] return nio def get_nio(self, port_number): """ Gets a port NIO binding. :param port_number: port number :returns: NIO instance """ if port_number not in self._nios: raise DynamipsError("Port {} is not allocated".format(port_number)) nio = self._nios[port_number] if not nio: raise DynamipsError("Port {} is not connected".format(port_number)) return nio async def set_mappings(self, mappings): """ Applies VC mappings :param mappings: mappings (dict) """ pvc_entry = re.compile(r"""^([0-9]*):([0-9]*):([0-9]*)$""") for source, destination in mappings.items(): if not isinstance(source, str) or not isinstance(destination, str): raise DynamipsError("Invalid ATM mappings") match_source_pvc = pvc_entry.search(source) match_destination_pvc = pvc_entry.search(destination) if match_source_pvc and match_destination_pvc: # add the virtual channels source_port, source_vpi, source_vci = map(int, match_source_pvc.group(1, 2, 3)) destination_port, destination_vpi, destination_vci = map(int, match_destination_pvc.group(1, 2, 3)) if self.has_port(destination_port): if (source_port, source_vpi, source_vci) not in self._active_mappings and \ (destination_port, destination_vpi, destination_vci) not in self._active_mappings: 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, id=self._id, source_port=source_port, source_vpi=source_vpi, source_vci=source_vci, destination_port=destination_port, destination_vpi=destination_vpi, destination_vci=destination_vci)) await self.map_pvc(source_port, source_vpi, source_vci, destination_port, destination_vpi, destination_vci) await self.map_pvc(destination_port, destination_vpi, destination_vci, source_port, source_vpi, source_vci) else: # add the virtual paths source_port, source_vpi = map(int, source.split(':')) destination_port, destination_vpi = map(int, destination.split(':')) if self.has_port(destination_port): if (source_port, source_vpi) not in self._active_mappings and (destination_port, destination_vpi) not in self._active_mappings: 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, id=self._id, source_port=source_port, source_vpi=source_vpi, destination_port=destination_port, destination_vpi=destination_vpi)) await self.map_vp(source_port, source_vpi, destination_port, destination_vpi) await self.map_vp(destination_port, destination_vpi, source_port, source_vpi) async def map_vp(self, port1, vpi1, port2, vpi2): """ Creates a new Virtual Path connection. :param port1: input port :param vpi1: input vpi :param port2: output port :param vpi2: output vpi """ if port1 not in self._nios: return if port2 not in self._nios: return nio1 = self._nios[port1] nio2 = self._nios[port2] await self._hypervisor.send('atmsw create_vpc "{name}" {input_nio} {input_vpi} {output_nio} {output_vpi}'.format(name=self._name, input_nio=nio1, input_vpi=vpi1, output_nio=nio2, output_vpi=vpi2)) log.info('ATM switch "{name}" [{id}]: VPC from port {port1} VPI {vpi1} to port {port2} VPI {vpi2} created'.format(name=self._name, id=self._id, port1=port1, vpi1=vpi1, port2=port2, vpi2=vpi2)) self._active_mappings[(port1, vpi1)] = (port2, vpi2) async def unmap_vp(self, port1, vpi1, port2, vpi2): """ Deletes a new Virtual Path connection. :param port1: input port :param vpi1: input vpi :param port2: output port :param vpi2: output vpi """ if port1 not in self._nios: return if port2 not in self._nios: return nio1 = self._nios[port1] nio2 = self._nios[port2] await self._hypervisor.send('atmsw delete_vpc "{name}" {input_nio} {input_vpi} {output_nio} {output_vpi}'.format(name=self._name, input_nio=nio1, input_vpi=vpi1, output_nio=nio2, output_vpi=vpi2)) log.info('ATM switch "{name}" [{id}]: VPC from port {port1} VPI {vpi1} to port {port2} VPI {vpi2} deleted'.format(name=self._name, id=self._id, port1=port1, vpi1=vpi1, port2=port2, vpi2=vpi2)) del self._active_mappings[(port1, vpi1)] async def map_pvc(self, port1, vpi1, vci1, port2, vpi2, vci2): """ Creates a new Virtual Channel connection (unidirectional). :param port1: input port :param vpi1: input vpi :param vci1: input vci :param port2: output port :param vpi2: output vpi :param vci2: output vci """ if port1 not in self._nios: return if port2 not in self._nios: return nio1 = self._nios[port1] nio2 = self._nios[port2] await self._hypervisor.send('atmsw create_vcc "{name}" {input_nio} {input_vpi} {input_vci} {output_nio} {output_vpi} {output_vci}'.format(name=self._name, input_nio=nio1, input_vpi=vpi1, input_vci=vci1, output_nio=nio2, output_vpi=vpi2, output_vci=vci2)) 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, id=self._id, port1=port1, vpi1=vpi1, vci1=vci1, port2=port2, vpi2=vpi2, vci2=vci2)) self._active_mappings[(port1, vpi1, vci1)] = (port2, vpi2, vci2) async def unmap_pvc(self, port1, vpi1, vci1, port2, vpi2, vci2): """ Deletes a new Virtual Channel connection (unidirectional). :param port1: input port :param vpi1: input vpi :param vci1: input vci :param port2: output port :param vpi2: output vpi :param vci2: output vci """ if port1 not in self._nios: return if port2 not in self._nios: return nio1 = self._nios[port1] nio2 = self._nios[port2] await self._hypervisor.send('atmsw delete_vcc "{name}" {input_nio} {input_vpi} {input_vci} {output_nio} {output_vpi} {output_vci}'.format(name=self._name, input_nio=nio1, input_vpi=vpi1, input_vci=vci1, output_nio=nio2, output_vpi=vpi2, output_vci=vci2)) 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, id=self._id, port1=port1, vpi1=vpi1, vci1=vci1, port2=port2, vpi2=vpi2, vci2=vci2)) del self._active_mappings[(port1, vpi1, vci1)] async def start_capture(self, port_number, output_file, data_link_type="DLT_ATM_RFC1483"): """ Starts a packet capture. :param port_number: allocated port number :param output_file: PCAP destination file for the capture :param data_link_type: PCAP data link type (DLT_*), default is DLT_ATM_RFC1483 """ nio = self.get_nio(port_number) data_link_type = data_link_type.lower() if data_link_type.startswith("dlt_"): data_link_type = data_link_type[4:] if nio.input_filter[0] is not None and nio.output_filter[0] is not None: raise DynamipsError("Port {} has already a filter applied".format(port_number)) await nio.start_packet_capture(output_file, data_link_type) log.info('ATM switch "{name}" [{id}]: starting packet capture on port {port}'.format(name=self._name, id=self._id, port=port_number)) async def stop_capture(self, port_number): """ Stops a packet capture. :param port_number: allocated port number """ nio = self.get_nio(port_number) if not nio.capturing: return await nio.stop_packet_capture() log.info('ATM switch "{name}" [{id}]: stopping packet capture on port {port}'.format(name=self._name, id=self._id, port=port_number))