Файловый менеджер

Файловый менеджер - Редактировать - /snap/core18/2846/usr/share/subiquity/subiquitycore/controllers/network.py

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# Copyright 2015 Canonical, Ltd. # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU Affero 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 Affero General Public License for more details. # # You should have received a copy of the GNU Affero General Public License # along with this program. If not, see <http://www.gnu.org/licenses/>. import copy from functools import partial import logging import os import random import select import socket import subprocess import yaml from probert.network import UdevObserver from subiquitycore.models import NetworkModel from subiquitycore.ui.views import (NetworkView, NetworkSetDefaultRouteView, NetworkBondInterfacesView, NetworkConfigureInterfaceView, NetworkConfigureIPv4InterfaceView, NetworkConfigureIPv6InterfaceView, NetworkConfigureWLANView) from subiquitycore.ui.views.network import ApplyingConfigWidget from subiquitycore.ui.dummy import DummyView from subiquitycore.controller import BaseController, view from subiquitycore.utils import run_command_start, run_command_summarize log = logging.getLogger("subiquitycore.controller.network") class BackgroundTask: """Something that runs without blocking the UI and can be canceled.""" def start(self): """Start the task. This is called on the UI thread, so must not block. """ raise NotImplementedError(self.start) def run(self): """Run the task. This is called on an arbitrary thread so don't do UI stuff! """ raise NotImplementedError(self.run) def end(self, observer, fut): """Call task_succeeded or task_failed on observer. This is called on the UI thread. fut is a concurrent.futures.Future holding the result of running run. """ raise NotImplementedError(self.end) def cancel(self): """Abort the task. Any calls to task_succeeded or task_failed on the observer will be ignored after this point so it doesn't really matter what run returns after this is called. """ raise NotImplementedError(self.cancel) class BackgroundProcess(BackgroundTask): def __init__(self, cmd): self.cmd = cmd self.proc = None def __repr__(self): return 'BackgroundProcess(%r)'%(self.cmd,) def start(self): self.proc = run_command_start(self.cmd) def run(self): stdout, stderr = self.proc.communicate() return run_command_summarize(self.proc, stdout, stderr) def end(self, observer, fut): result = fut.result() if result['status'] == 0: observer.task_succeeded() else: observer.task_failed(result['err']) def cancel(self): if self.proc is None: return try: self.proc.terminate() except ProcessLookupError: pass # It's OK if the process has already terminated. class PythonSleep(BackgroundTask): def __init__(self, duration): self.duration = duration self.r, self.w = os.pipe() def __repr__(self): return 'PythonSleep(%r)'%(self.duration,) def start(self): pass def run(self): r, _, _ = select.select([self.r], [], [], self.duration) if not r: return True os.close(self.r) os.close(self.w) def end(self, observer, fut): if fut.result(): observer.task_succeeded() else: observer.task_failed() def cancel(self): os.write(self.w, b'x') class WaitForDefaultRouteTask(BackgroundTask): def __init__(self, timeout, udev_observer): self.timeout = timeout self.udev_observer = udev_observer def __repr__(self): return 'WaitForDefaultRouteTask(%r)'%(self.timeout,) def got_route(self): os.write(self.success_w, b'x') def start(self): self.fail_r, self.fail_w = os.pipe() self.success_r, self.success_w = os.pipe() self.udev_observer.add_default_route_waiter(self.got_route) def run(self): try: r, _, _ = select.select([self.fail_r, self.success_r], [], [], self.timeout) return self.success_r in r finally: os.close(self.fail_r) os.close(self.fail_w) os.close(self.success_r) os.close(self.success_w) def end(self, observer, fut): if fut.result(): observer.task_succeeded() else: observer.task_failed('timeout') def cancel(self): os.write(self.fail_w, b'x') class TaskSequence: def __init__(self, run_in_bg, tasks, watcher): self.run_in_bg = run_in_bg self.tasks = tasks self.watcher = watcher self.canceled = False self.stage = None self.curtask = None def run(self): self._run1() def cancel(self): if self.curtask is not None: log.debug("canceling %s", self.curtask) self.curtask.cancel() self.canceled = True def _run1(self): self.stage, self.curtask = self.tasks[0] self.tasks = self.tasks[1:] log.debug('running %s for stage %s', self.curtask, self.stage) self.curtask.start() self.run_in_bg(self.curtask.run, lambda fut:self.curtask.end(self, fut)) def task_succeeded(self): if self.canceled: return self.watcher.task_complete(self.stage) if len(self.tasks) == 0: self.watcher.tasks_finished() else: self._run1() def task_failed(self, info=None): if self.canceled: return self.watcher.task_error(self.stage, info) def sanitize_config(config): """Return a copy of config with passwords redacted.""" config = copy.deepcopy(config) for iface, iface_config in config.get('network', {}).get('wifis', {}).items(): for ap, ap_config in iface_config.get('access-points', {}).items(): if 'password' in ap_config: ap_config['password'] = '<REDACTED>' return config class SubiquityObserver(UdevObserver): def __init__(self, model, ui, loop): UdevObserver.__init__(self) self.model = model self.ui = ui self.loop = loop self.default_route_waiter = None self.default_routes = set() def start(self): fds = super().start() for fd in fds: self.loop.watch_file(fd, partial(self.data_ready, fd)) return fds def new_link(self, ifindex, link): self.model.new_link(ifindex, link) def del_link(self, ifindex): self.model.del_link(ifindex) if ifindex in self.default_routes: self.default_routes.remove(ifindex) def update_link(self, ifindex): self.model.update_link(ifindex) def route_change(self, action, data): if data['dst'] != b'default': return if data['table'] != 254: return super().route_change(action, data) ifindex = data['ifindex'] if action == "NEW": self.default_routes.add(ifindex) if self.default_route_waiter: self.default_route_waiter() elif action == "DEL" and ifindex in self.default_routes: self.default_routes.remove(ifindex) log.debug('default routes %s', self.default_routes) def add_default_route_waiter(self, waiter): if self.default_routes: waiter() else: self.default_route_waiter = waiter def refresh(self): v = self.ui.frame.body if hasattr(v, 'refresh_model_inputs'): v.refresh_model_inputs() def data_ready(self, fd): code = subprocess.call(['udevadm', 'settle', '-t', '0']) if code != 0: log.debug("waiting 0.1 to let udev event queue settle") self.loop.set_alarm_in(0.1, lambda loop, ud:self.data_ready(fd)) super().data_ready(fd) self.refresh() default_netplan = ''' network: version: 2 ethernets: "en": addresses: - 10.0.2.15/24 gateway4: 10.0.2.2 nameservers: addresses: - 8.8.8.8 - 8.4.8.4 search: - foo - bar "eth": dhcp4: true wifis: "wl*": dhcp4: true access-points: "some-ap": password: password ''' class NetworkController(BaseController): signals = [ ('menu:network:main:set-default-v4-route', 'set_default_v4_route'), ('menu:network:main:set-default-v6-route', 'set_default_v6_route'), ] root = "/" def __init__(self, common): super().__init__(common) if self.opts.dry_run: self.root = os.path.abspath(".subiquity") self.tried_once = False netplan_path = self.netplan_path netplan_dir = os.path.dirname(netplan_path) if os.path.exists(netplan_dir): import shutil shutil.rmtree(netplan_dir) os.makedirs(netplan_dir) with open(netplan_path, 'w') as fp: fp.write(default_netplan) self.model = NetworkModel(self.root) self.observer = SubiquityObserver(self.model, self.ui, self.loop) self.observer.start() def start_scan(self, dev): self.observer.wlan_listener.trigger_scan(dev.ifindex) def cancel(self): if len(self.view_stack) <= 1: self.signal.emit_signal('prev-screen') else: self.prev_view() def default(self): self.view_stack = [] self.start() @view def start(self): title = "Network connections" excerpt = ("Configure at least one interface this server can use to talk to " "other machines, and which preferably provides sufficient access for " "updates.") footer = ("Additional networking info here") self.ui.set_header(title, excerpt) self.ui.set_footer(footer, 20) self.ui.set_body(NetworkView(self.model, self)) @property def netplan_path(self): if self.opts.project == "subiquity": netplan_config_file_name = '00-installer-config.yaml' else: netplan_config_file_name = '00-snapd-config.yaml' return os.path.join(self.root, 'etc/netplan', netplan_config_file_name) def network_finish(self, config): log.debug("network config: \n%s", yaml.dump(sanitize_config(config), default_flow_style=False)) netplan_path = self.netplan_path while True: try: tmppath = '%s.%s' % (netplan_path, random.randrange(0, 1000)) fd = os.open(tmppath, os.O_WRONLY \| os.O_EXCL \| os.O_CREAT, 0o0600) except FileExistsError: continue else: break w = os.fdopen(fd, 'w') with w: w.write("# This is the network config written by '{}'\n".format(self.opts.project)) w.write(yaml.dump(config)) os.rename(tmppath, netplan_path) self.model.parse_netplan_configs() if self.opts.dry_run: tasks = [ ('one', BackgroundProcess(['sleep', '0.1'])), ('two', PythonSleep(0.1)), ('three', BackgroundProcess(['sleep', '0.1'])), ] if os.path.exists('/lib/netplan/generate'): # If netplan appears to be installed, run generate to at # least test that what we wrote is acceptable to netplan. tasks.append(('generate', BackgroundProcess(['netplan', 'generate', '--root', self.root]))) if not self.tried_once: tasks.append(('timeout', WaitForDefaultRouteTask(3, self.observer))) tasks.append(('fail', BackgroundProcess(['false']))) self.tried_once = True else: tasks = [ ('generate', BackgroundProcess(['/lib/netplan/generate'])), ('apply', BackgroundProcess(['netplan', 'apply'])), ('timeout', WaitForDefaultRouteTask(30, self.observer)), ] def cancel(): self.cs.cancel() self.task_error('canceled') self.acw = ApplyingConfigWidget(len(tasks), cancel) self.ui.frame.body.show_overlay(self.acw) self.cs = TaskSequence(self.run_in_bg, tasks, self) self.cs.run() def task_complete(self, stage): self.acw.advance() def task_error(self, stage, info=None): self.ui.frame.body.remove_overlay() self.ui.frame.body.show_network_error(stage, info) def tasks_finished(self): self.signal.emit_signal('network-config-written', self.netplan_path) self.signal.emit_signal('next-screen') @view def set_default_v4_route(self): self.ui.set_header("Default route") self.ui.set_body(NetworkSetDefaultRouteView(self.model, socket.AF_INET, self)) @view def set_default_v6_route(self): self.ui.set_header("Default route") self.ui.set_body(NetworkSetDefaultRouteView(self.model, socket.AF_INET6, self)) @view def bond_interfaces(self): self.ui.set_header("Bond interfaces") self.ui.set_body(NetworkBondInterfacesView(self.model, self)) @view def network_configure_interface(self, iface): self.ui.set_header("Network interface {}".format(iface)) self.ui.set_body(NetworkConfigureInterfaceView(self.model, self, iface)) @view def network_configure_ipv4_interface(self, iface): self.ui.set_header("Network interface {} manual IPv4 " "configuration".format(iface)) self.ui.set_body(NetworkConfigureIPv4InterfaceView(self.model, self, iface)) @view def network_configure_wlan_interface(self, iface): self.ui.set_header("Network interface {} WIFI " "configuration".format(iface)) self.ui.set_body(NetworkConfigureWLANView(self.model, self, iface)) @view def network_configure_ipv6_interface(self, iface): self.ui.set_header("Network interface {} manual IPv6 " "configuration".format(iface)) self.ui.set_body(NetworkConfigureIPv6InterfaceView(self.model, self, iface)) @view def install_network_driver(self): self.ui.set_body(DummyView(self))

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