# -*- coding: utf-8 -*- # # Copyright (C) 2015 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 . """ Dynamips server module. """ import aiohttp import sys import os import shutil import socket import time import asyncio import tempfile import glob import logging log = logging.getLogger(__name__) from gns3server.utils.interfaces import get_windows_interfaces from gns3server.utils.asyncio import wait_run_in_executor from pkg_resources import parse_version from uuid import UUID, uuid4 from ..base_manager import BaseManager from ..project_manager import ProjectManager from .dynamips_error import DynamipsError from .hypervisor import Hypervisor from .nodes.router import Router from .dynamips_vm import DynamipsVM from .dynamips_device import DynamipsDevice # NIOs from .nios.nio_udp import NIOUDP from .nios.nio_unix import NIOUNIX from .nios.nio_vde import NIOVDE from .nios.nio_tap import NIOTAP from .nios.nio_generic_ethernet import NIOGenericEthernet from .nios.nio_linux_ethernet import NIOLinuxEthernet from .nios.nio_fifo import NIOFIFO from .nios.nio_mcast import NIOMcast from .nios.nio_null import NIONull # Adapters from .adapters.c7200_io_2fe import C7200_IO_2FE from .adapters.c7200_io_fe import C7200_IO_FE from .adapters.c7200_io_ge_e import C7200_IO_GE_E from .adapters.nm_16esw import NM_16ESW from .adapters.nm_1e import NM_1E from .adapters.nm_1fe_tx import NM_1FE_TX from .adapters.nm_4e import NM_4E from .adapters.nm_4t import NM_4T from .adapters.pa_2fe_tx import PA_2FE_TX from .adapters.pa_4e import PA_4E from .adapters.pa_4t import PA_4T from .adapters.pa_8e import PA_8E from .adapters.pa_8t import PA_8T from .adapters.pa_a1 import PA_A1 from .adapters.pa_fe_tx import PA_FE_TX from .adapters.pa_ge import PA_GE from .adapters.pa_pos_oc3 import PA_POS_OC3 from .adapters.wic_1enet import WIC_1ENET from .adapters.wic_1t import WIC_1T from .adapters.wic_2t import WIC_2T ADAPTER_MATRIX = {"C7200-IO-2FE": C7200_IO_2FE, "C7200-IO-FE": C7200_IO_FE, "C7200-IO-GE-E": C7200_IO_GE_E, "NM-16ESW": NM_16ESW, "NM-1E": NM_1E, "NM-1FE-TX": NM_1FE_TX, "NM-4E": NM_4E, "NM-4T": NM_4T, "PA-2FE-TX": PA_2FE_TX, "PA-4E": PA_4E, "PA-4T+": PA_4T, "PA-8E": PA_8E, "PA-8T": PA_8T, "PA-A1": PA_A1, "PA-FE-TX": PA_FE_TX, "PA-GE": PA_GE, "PA-POS-OC3": PA_POS_OC3} WIC_MATRIX = {"WIC-1ENET": WIC_1ENET, "WIC-1T": WIC_1T, "WIC-2T": WIC_2T} class Dynamips(BaseManager): _VM_CLASS = DynamipsVM _DEVICE_CLASS = DynamipsDevice def __init__(self): super().__init__() self._devices = {} self._ghost_files = set() self._dynamips_path = None @asyncio.coroutine def unload(self): yield from BaseManager.unload(self) tasks = [] for device in self._devices.values(): tasks.append(asyncio.async(device.hypervisor.stop())) if tasks: done, _ = yield from asyncio.wait(tasks) for future in done: try: future.result() except Exception as e: log.error("Could not stop device hypervisor {}".format(e), exc_info=1) continue @asyncio.coroutine def project_closed(self, project): """ Called when a project is closed. :param project: Project instance """ # delete the Dynamips devices corresponding to the project tasks = [] for device in self._devices.values(): if device.project.id == project.id: tasks.append(asyncio.async(device.delete())) if tasks: done, _ = yield from asyncio.wait(tasks) for future in done: try: future.result() except Exception as e: log.error("Could not delete device {}".format(e), exc_info=1) # delete useless files project_dir = project.module_working_directory(self.module_name.lower()) files = glob.glob(os.path.join(project_dir, "*.ghost")) files += glob.glob(os.path.join(project_dir, "*_lock")) files += glob.glob(os.path.join(project_dir, "ilt_*")) files += glob.glob(os.path.join(project_dir, "c[0-9][0-9][0-9][0-9]_*_rommon_vars")) files += glob.glob(os.path.join(project_dir, "c[0-9][0-9][0-9][0-9]_*_ssa")) for file in files: try: log.debug("Deleting file {}".format(file)) if file in self._ghost_files: self._ghost_files.remove(file) yield from wait_run_in_executor(os.remove, file) except OSError as e: log.warn("Could not delete file {}: {}".format(file, e)) continue @asyncio.coroutine def project_moved(self, project): """ Called when a project is moved. :param project: Project instance """ for vm in self._vms: if vm.project.id == project.id: yield from vm.hypervisor.set_working_dir(project.module_working_directory(self.module_name.lower())) for device in self._devices.values(): if device.project.id == project.id: yield from device.hypervisor.set_working_dir(project.module_working_directory(self.module_name.lower())) @property def dynamips_path(self): """ Returns the path to Dynamips. :returns: path """ return self._dynamips_path @asyncio.coroutine def create_device(self, name, project_id, device_id, device_type, *args, **kwargs): """ Create a new Dynamips device. :param name: Device name :param project_id: Project identifier :param vm_id: restore a VM identifier """ project = ProjectManager.instance().get_project(project_id) if not device_id: device_id = str(uuid4()) device = self._DEVICE_CLASS(name, device_id, project, self, device_type, *args, **kwargs) yield from device.create() self._devices[device.id] = device return device def get_device(self, device_id, project_id=None): """ Returns a device instance. :param device_id: Device identifier :param project_id: Project identifier :returns: Device instance """ if project_id: # check the project_id exists project = ProjectManager.instance().get_project(project_id) try: UUID(device_id, version=4) except ValueError: raise aiohttp.web.HTTPBadRequest(text="Device ID} is not a valid UUID".format(device_id)) if device_id not in self._devices: raise aiohttp.web.HTTPNotFound(text="Device ID {} doesn't exist".format(device_id)) device = self._devices[device_id] if project_id: if device.project.id != project.id: raise aiohttp.web.HTTPNotFound(text="Project ID {} doesn't belong to device {}".format(project_id, device.name)) return device @asyncio.coroutine def delete_device(self, device_id): """ Delete a device :param device_id: Device identifier :returns: Device instance """ device = self.get_device(device_id) yield from device.delete() del self._devices[device.id] return device def find_dynamips(self): # look for Dynamips dynamips_path = self.config.get_section_config("Dynamips").get("dynamips_path") if not dynamips_path: dynamips_path = shutil.which("dynamips") if not dynamips_path: raise DynamipsError("Could not find Dynamips") if not os.path.isfile(dynamips_path): raise DynamipsError("Dynamips {} is not accessible".format(dynamips_path)) if not os.access(dynamips_path, os.X_OK): raise DynamipsError("Dynamips is not executable") self._dynamips_path = dynamips_path return dynamips_path @asyncio.coroutine def _wait_for_hypervisor(self, host, port, timeout=10.0): """ Waits for an hypervisor to be started (accepting a socket connection) :param host: host/address to connect to the hypervisor :param port: port to connect to the hypervisor """ begin = time.time() connection_success = False last_exception = None while time.time() - begin < timeout: yield from asyncio.sleep(0.01) try: _, writer = yield from asyncio.open_connection(host, port) writer.close() except OSError as e: last_exception = e continue connection_success = True break if not connection_success: raise DynamipsError("Couldn't connect to hypervisor on {}:{} :{}".format(host, port, last_exception)) else: log.info("Dynamips server ready after {:.4f} seconds".format(time.time() - begin)) @asyncio.coroutine def start_new_hypervisor(self, working_dir=None): """ Creates a new Dynamips process and start it. :param working_dir: working directory :returns: the new hypervisor instance """ if not self._dynamips_path: self.find_dynamips() if not working_dir: working_dir = tempfile.gettempdir() try: # let the OS find an unused port for the Dynamips hypervisor with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as sock: sock.bind(("127.0.0.1", 0)) port = sock.getsockname()[1] except OSError as e: raise DynamipsError("Could not find free port for the Dynamips hypervisor: {}".format(e)) hypervisor = Hypervisor(self._dynamips_path, working_dir, "127.0.0.1", port) log.info("Creating new hypervisor {}:{} with working directory {}".format(hypervisor.host, hypervisor.port, working_dir)) yield from hypervisor.start() yield from self._wait_for_hypervisor("127.0.0.1", port) log.info("Hypervisor {}:{} has successfully started".format(hypervisor.host, hypervisor.port)) yield from hypervisor.connect() if parse_version(hypervisor.version) < parse_version('0.2.11'): raise DynamipsError("Dynamips version must be >= 0.2.11, detected version is {}".format(hypervisor.version)) return hypervisor @asyncio.coroutine def ghost_ios_support(self, vm): ghost_ios_support = self.config.get_section_config("Dynamips").getboolean("ghost_ios_support", True) if ghost_ios_support: yield from self._set_ghost_ios(vm) @asyncio.coroutine def create_nio(self, node, nio_settings): """ Creates a new NIO. :param node: Dynamips node instance :param nio_settings: information to create the NIO :returns: a NIO object """ nio = None if nio_settings["type"] == "nio_udp": lport = nio_settings["lport"] rhost = nio_settings["rhost"] rport = nio_settings["rport"] try: # TODO: handle IPv6 with socket.socket(socket.AF_INET, socket.SOCK_DGRAM) as sock: sock.connect((rhost, rport)) except OSError as e: raise DynamipsError("Could not create an UDP connection to {}:{}: {}".format(rhost, rport, e)) nio = NIOUDP(node.hypervisor, lport, rhost, rport) elif nio_settings["type"] == "nio_generic_ethernet": ethernet_device = nio_settings["ethernet_device"] if sys.platform.startswith("win"): # replace the interface name by the GUID on Windows interfaces = get_windows_interfaces() npf_interface = None for interface in interfaces: if interface["name"] == ethernet_device: npf_interface = interface["id"] if not npf_interface: raise DynamipsError("Could not find interface {} on this host".format(ethernet_device)) else: ethernet_device = npf_interface nio = NIOGenericEthernet(node.hypervisor, ethernet_device) elif nio_settings["type"] == "nio_linux_ethernet": if sys.platform.startswith("win"): raise DynamipsError("This NIO type is not supported on Windows") ethernet_device = nio_settings["ethernet_device"] nio = NIOLinuxEthernet(node.hypervisor, ethernet_device) elif nio_settings["type"] == "nio_tap": tap_device = nio_settings["tap_device"] nio = NIOTAP(node.hypervisor, tap_device) elif nio_settings["type"] == "nio_unix": local_file = nio_settings["local_file"] remote_file = nio_settings["remote_file"] nio = NIOUNIX(node.hypervisor, local_file, remote_file) elif nio_settings["type"] == "nio_vde": control_file = nio_settings["control_file"] local_file = nio_settings["local_file"] nio = NIOVDE(node.hypervisor, control_file, local_file) elif nio_settings["type"] == "nio_null": nio = NIONull(node.hypervisor) yield from nio.create() return nio @asyncio.coroutine def _set_ghost_ios(self, vm): """ Manages Ghost IOS support. :param vm: VM instance """ if not vm.mmap: raise DynamipsError("mmap support is required to enable ghost IOS support") if vm.platform == "c7200" and vm.npe == "npe-g2": log.warning("Ghost IOS is not supported for c7200 with NPE-G2") return ghost_file = vm.formatted_ghost_file() ghost_file_path = os.path.join(vm.hypervisor.working_dir, ghost_file) if ghost_file_path not in self._ghost_files: # create a new ghost IOS instance ghost_id = str(uuid4()) ghost = Router("ghost-" + ghost_file, ghost_id, vm.project, vm.manager, platform=vm.platform, hypervisor=vm.hypervisor, ghost_flag=True) try: yield from ghost.create() yield from ghost.set_image(vm.image) yield from ghost.set_ghost_status(1) yield from ghost.set_ghost_file(ghost_file) yield from ghost.set_ram(vm.ram) try: yield from ghost.start() yield from ghost.stop() self._ghost_files.add(ghost_file_path) except DynamipsError: raise finally: yield from ghost.clean_delete() except DynamipsError as e: log.warn("Could not create ghost instance: {}".format(e)) if vm.ghost_file != ghost_file and os.path.isfile(ghost_file_path): # set the ghost file to the router yield from vm.set_ghost_status(2) yield from vm.set_ghost_file(ghost_file) @asyncio.coroutine def update_vm_settings(self, vm, settings): """ Updates the VM settings. :param vm: VM instance :param settings: settings to update (dict) """ for name, value in settings.items(): if hasattr(vm, name) and getattr(vm, name) != value: if hasattr(vm, "set_{}".format(name)): setter = getattr(vm, "set_{}".format(name)) if asyncio.iscoroutinefunction(vm.close): yield from setter(value) else: setter(value) elif name.startswith("slot") and value in ADAPTER_MATRIX: slot_id = int(name[-1]) adapter_name = value adapter = ADAPTER_MATRIX[adapter_name]() if vm.slots[slot_id] and not isinstance(vm.slots[slot_id], type(adapter)): yield from vm.slot_remove_binding(slot_id) if not isinstance(vm.slots[slot_id], type(adapter)): yield from vm.slot_add_binding(slot_id, adapter) elif name.startswith("slot") and value is None: slot_id = int(name[-1]) if vm.slots[slot_id]: yield from vm.slot_remove_binding(slot_id) elif name.startswith("wic") and value in WIC_MATRIX: wic_slot_id = int(name[-1]) wic_name = value wic = WIC_MATRIX[wic_name]() if vm.slots[0].wics[wic_slot_id] and not isinstance(vm.slots[0].wics[wic_slot_id], type(wic)): yield from vm.uninstall_wic(wic_slot_id) if not isinstance(vm.slots[0].wics[wic_slot_id], type(wic)): yield from vm.install_wic(wic_slot_id, wic) elif name.startswith("wic") and value is None: wic_slot_id = int(name[-1]) if vm.slots[0].wics and vm.slots[0].wics[wic_slot_id]: yield from vm.uninstall_wic(wic_slot_id) # update the configs if needed yield from self.create_vm_configs(vm, settings.get("startup_config_content"), settings.get("private_config_content")) @asyncio.coroutine def create_vm_configs(self, vm, startup_config_content, private_config_content): """ Creates VM configs from pushed content. :param vm: VM instance :param startup_config_content: content of the startup-config :param private_config_content: content of the private-config """ module_workdir = vm.project.module_working_directory(self.module_name.lower()) default_startup_config_path = os.path.join(module_workdir, "configs", "i{}_startup-config.cfg".format(vm.dynamips_id)) default_private_config_path = os.path.join(module_workdir, "configs", "i{}_private-config.cfg".format(vm.dynamips_id)) if startup_config_content: startup_config_path = self._create_config(vm, startup_config_content, default_startup_config_path) yield from vm.set_config(startup_config_path) if private_config_content: private_config_path = self._create_config(vm, private_config_content, default_private_config_path) yield from vm.set_config(vm.startup_config, private_config_path) def _create_config(self, vm, content, path): """ Creates a config file. :param vm: VM instance :param content: config content :param path: path to the destination config file :returns: relative path to the created config file """ log.info("Creating config file {}".format(path)) content = "!\n" + content.replace("\r", "") content = content.replace('%h', vm.name) config_dir = os.path.dirname(path) try: os.makedirs(config_dir, exist_ok=True) except OSError as e: raise DynamipsError("Could not create Dynamips configs directory: {}".format(e)) try: with open(path, "w") as f: f.write(content) except OSError as e: raise DynamipsError("Could not create config file {}: {}".format(path, e)) return os.path.join("configs", os.path.basename(path)) @asyncio.coroutine def auto_idlepc(self, vm): """ Try to find the best possible idle-pc value. :param vm: VM instance """ yield from vm.set_idlepc("0x0") was_auto_started = False try: status = yield from vm.get_status() if status != "running": yield from vm.start() was_auto_started = True yield from asyncio.sleep(20) # leave time to the router to boot validated_idlepc = None idlepcs = yield from vm.get_idle_pc_prop() if not idlepcs: raise DynamipsError("No Idle-PC values found") for idlepc in idlepcs: yield from vm.set_idlepc(idlepc.split()[0]) log.debug("Auto Idle-PC: trying idle-PC value {}".format(vm.idlepc)) start_time = time.time() initial_cpu_usage = yield from vm.get_cpu_usage() log.debug("Auto Idle-PC: initial CPU usage is {}%".format(initial_cpu_usage)) yield from asyncio.sleep(3) # wait 3 seconds to probe the cpu again elapsed_time = time.time() - start_time cpu_usage = yield from vm.get_cpu_usage() cpu_elapsed_usage = cpu_usage - initial_cpu_usage cpu_usage = abs(cpu_elapsed_usage * 100.0 / elapsed_time) if cpu_usage > 100: cpu_usage = 100 log.debug("Auto Idle-PC: CPU usage is {}% after {:.2} seconds".format(cpu_usage, elapsed_time)) if cpu_usage < 70: validated_idlepc = vm.idlepc log.debug("Auto Idle-PC: idle-PC value {} has been validated".format(validated_idlepc)) break if validated_idlepc is None: raise DynamipsError("Sorry, no idle-pc value was suitable") except DynamipsError: raise finally: if was_auto_started: yield from vm.stop() return validated_idlepc