# -*- 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 Ethernet switch module ("ethsw"). http://github.com/GNS3/dynamips/blob/master/README.hypervisor#L558 """ import asyncio from .device import Device from ..nios.nio_udp import NIOUDP from ..dynamips_error import DynamipsError import logging log = logging.getLogger(__name__) class EthernetSwitch(Device): """ Dynamips Ethernet switch. :param name: name for this switch :param device_id: Device instance identifier :param project: Project instance :param manager: Parent VM Manager :param hypervisor: Dynamips hypervisor instance """ def __init__(self, name, device_id, project, manager, hypervisor=None): super().__init__(name, device_id, project, manager, hypervisor) self._nios = {} self._mappings = {} def __json__(self): ethernet_switch_info = {"name": self.name, "device_id": self.id, "project_id": self.project.id} ports = [] for port_number, settings in self._mappings.items(): ports.append({"port": port_number, "type": settings[0], "vlan": settings[1]}) ethernet_switch_info["ports"] = ports return ethernet_switch_info @asyncio.coroutine def create(self): if self._hypervisor is None: module_workdir = self.project.module_working_directory(self.manager.module_name.lower()) self._hypervisor = yield from self.manager.start_new_hypervisor(working_dir=module_workdir) yield from self._hypervisor.send('ethsw create "{}"'.format(self._name)) log.info('Ethernet switch "{name}" [{id}] has been created'.format(name=self._name, id=self._id)) self._hypervisor.devices.append(self) @asyncio.coroutine def set_name(self, new_name): """ Renames this Ethernet switch. :param new_name: New name for this switch """ yield from self._hypervisor.send('ethsw rename "{name}" "{new_name}"'.format(name=self._name, new_name=new_name)) log.info('Ethernet 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 Ethernet switch. :returns: nio list """ return self._nios @property def mappings(self): """ Returns port mappings :returns: mappings list """ return self._mappings @asyncio.coroutine def delete(self): """ Deletes this Ethernet switch. """ for nio in self._nios.values(): if nio and isinstance(nio, NIOUDP): self.manager.port_manager.release_udp_port(nio.lport) try: yield from self._hypervisor.send('ethsw delete "{}"'.format(self._name)) log.info('Ethernet switch "{name}" [{id}] has been deleted'.format(name=self._name, id=self._id)) except DynamipsError: log.debug("Could not properly delete Ethernet switch {}".format(self._name)) self._hypervisor.devices.remove(self) if self._hypervisor and not self._hypervisor.devices: yield from self.hypervisor.stop() @asyncio.coroutine def add_nio(self, nio, port_number): """ Adds a NIO as new port on Ethernet 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)) yield from self._hypervisor.send('ethsw add_nio "{name}" {nio}'.format(name=self._name, nio=nio)) log.info('Ethernet switch "{name}" [{id}]: NIO {nio} bound to port {port}'.format(name=self._name, id=self._id, nio=nio, port=port_number)) self._nios[port_number] = nio @asyncio.coroutine def remove_nio(self, port_number): """ Removes the specified NIO as member of this Ethernet switch. :param port_number: allocated port number :returns: the NIO that was bound to the port """ if port_number not in self._nios: raise DynamipsError("Port {} is not allocated".format(port_number)) nio = self._nios[port_number] if isinstance(nio, NIOUDP): self.manager.port_manager.release_udp_port(nio.lport) yield from self._hypervisor.send('ethsw remove_nio "{name}" {nio}'.format(name=self._name, nio=nio)) log.info('Ethernet 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] if port_number in self._mappings: del self._mappings[port_number] return nio @asyncio.coroutine def set_port_settings(self, port_number, settings): """ Applies port settings to a specific port. :param port_number: port number to set the settings :param settings: port settings """ if settings["type"] == "access": yield from self.set_access_port(port_number, settings["vlan"]) elif settings["type"] == "dot1q": yield from self.set_dot1q_port(port_number, settings["vlan"]) elif settings["type"] == "qinq": yield from self.set_qinq_port(port_number, settings["vlan"]) @asyncio.coroutine def set_access_port(self, port_number, vlan_id): """ Sets the specified port as an ACCESS port. :param port_number: allocated port number :param vlan_id: VLAN number membership """ if port_number not in self._nios: raise DynamipsError("Port {} is not allocated".format(port_number)) nio = self._nios[port_number] yield from self._hypervisor.send('ethsw set_access_port "{name}" {nio} {vlan_id}'.format(name=self._name, nio=nio, vlan_id=vlan_id)) log.info('Ethernet switch "{name}" [{id}]: port {port} set as an access port in VLAN {vlan_id}'.format(name=self._name, id=self._id, port=port_number, vlan_id=vlan_id)) self._mappings[port_number] = ("access", vlan_id) @asyncio.coroutine def set_dot1q_port(self, port_number, native_vlan): """ Sets the specified port as a 802.1Q trunk port. :param port_number: allocated port number :param native_vlan: native VLAN for this trunk port """ if port_number not in self._nios: raise DynamipsError("Port {} is not allocated".format(port_number)) nio = self._nios[port_number] yield from self._hypervisor.send('ethsw set_dot1q_port "{name}" {nio} {native_vlan}'.format(name=self._name, nio=nio, native_vlan=native_vlan)) log.info('Ethernet switch "{name}" [{id}]: port {port} set as a 802.1Q port with native VLAN {vlan_id}'.format(name=self._name, id=self._id, port=port_number, vlan_id=native_vlan)) self._mappings[port_number] = ("dot1q", native_vlan) @asyncio.coroutine def set_qinq_port(self, port_number, outer_vlan): """ Sets the specified port as a trunk (QinQ) port. :param port_number: allocated port number :param outer_vlan: outer VLAN (transport VLAN) for this QinQ port """ if port_number not in self._nios: raise DynamipsError("Port {} is not allocated".format(port_number)) nio = self._nios[port_number] yield from self._hypervisor.send('ethsw set_qinq_port "{name}" {nio} {outer_vlan}'.format(name=self._name, nio=nio, outer_vlan=outer_vlan)) log.info('Ethernet switch "{name}" [{id}]: port {port} set as a QinQ port with outer VLAN {vlan_id}'.format(name=self._name, id=self._id, port=port_number, vlan_id=outer_vlan)) self._mappings[port_number] = ("qinq", outer_vlan) @asyncio.coroutine def get_mac_addr_table(self): """ Returns the MAC address table for this Ethernet switch. :returns: list of entries (Ethernet address, VLAN, NIO) """ mac_addr_table = yield from self._hypervisor.send('ethsw show_mac_addr_table "{}"'.format(self._name)) return mac_addr_table @asyncio.coroutine def clear_mac_addr_table(self): """ Clears the MAC address table for this Ethernet switch. """ yield from self._hypervisor.send('ethsw clear_mac_addr_table "{}"'.format(self._name)) @asyncio.coroutine def start_capture(self, port_number, output_file, data_link_type="DLT_EN10MB"): """ 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_EN10MB """ if port_number not in self._nios: raise DynamipsError("Port {} is not allocated".format(port_number)) nio = self._nios[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)) yield from nio.bind_filter("both", "capture") yield from nio.setup_filter("both", "{} {}".format(data_link_type, output_file)) log.info('Ethernet switch "{name}" [{id}]: starting packet capture on port {port}'.format(name=self._name, id=self._id, port=port_number)) @asyncio.coroutine def stop_capture(self, port_number): """ Stops a packet capture. :param port_number: allocated port number """ if port_number not in self._nios: raise DynamipsError("Port {} is not allocated".format(port_number)) nio = self._nios[port_number] yield from nio.unbind_filter("both") log.info('Ethernet switch "{name}" [{id}]: stopping packet capture on port {port}'.format(name=self._name, id=self._id, port=port_number))