/mandos/trunk : revision 550

11

# "AvahiService" class, and some lines in "main".

12

#

13

# Everything else is

14

15

14

15

16

#

17

# This program is free software: you can redistribute it and/or modify

18

# it under the terms of the GNU General Public License as published by

34

from __future__ import (division, absolute_import, print_function,

35

unicode_literals)

36

37

from future_builtins import *

38

39

37

import SocketServer as socketserver

40

38

import socket

41

39

import argparse

67

65

import types

68

66

import binascii

69

67

import tempfile

70

import itertools

71

import collections

72

68

73

69

import dbus

74

70

import dbus.service

79

75

import ctypes.util

80

76

import xml.dom.minidom

81

77

import inspect

78

import GnuPGInterface

82

79

83

80

try:

84

81

SO_BINDTODEVICE = socket.SO_BINDTODEVICE

88

85

except ImportError:

89

86

SO_BINDTODEVICE = None

90

87

91

version = "1.6.6"

88

version = "1.5.0"

92

89

stored_state_file = "clients.pickle"

93

90

94

91

logger = logging.getLogger()

95

syslogger = None

92

syslogger = (logging.handlers.SysLogHandler

93

(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

94

address = str("/dev/log")))

96

95

97

96

try:

98

97

if_nametoindex = (ctypes.cdll.LoadLibrary

114

113

def initlogger(debug, level=logging.WARNING):

115

114

"""init logger and add loglevel"""

116

115

117

global syslogger

118

syslogger = (logging.handlers.SysLogHandler

119

(facility =

120

logging.handlers.SysLogHandler.LOG_DAEMON,

121

address = str("/dev/log")))

122

116

syslogger.setFormatter(logging.Formatter

123

117

('Mandos [%(process)d]: %(levelname)s:'

124

118

' %(message)s'))

142

136

class PGPEngine(object):

143

137

"""A simple class for OpenPGP symmetric encryption & decryption"""

144

138

def __init__(self):

139

self.gnupg = GnuPGInterface.GnuPG()

145

140

self.tempdir = tempfile.mkdtemp(prefix="mandos-")

146

self.gnupgargs = ['--batch',

147

'--home', self.tempdir,

148

'--force-mdc',

149

'--quiet',

150

'--no-use-agent']

141

self.gnupg = GnuPGInterface.GnuPG()

142

self.gnupg.options.meta_interactive = False

143

self.gnupg.options.homedir = self.tempdir

144

self.gnupg.options.extra_args.extend(['--force-mdc',

145

'--quiet',

146

'--no-use-agent'])

151

147

152

148

def __enter__(self):

153

149

return self

154

150

155

def __exit__(self, exc_type, exc_value, traceback):

151

def __exit__ (self, exc_type, exc_value, traceback):

156

152

self._cleanup()

157

153

return False

158

154

175

171

def password_encode(self, password):

176

172

# Passphrase can not be empty and can not contain newlines or

177

173

# NUL bytes. So we prefix it and hex encode it.

178

encoded = b"mandos" + binascii.hexlify(password)

179

if len(encoded) > 2048:

180

# GnuPG can't handle long passwords, so encode differently

181

encoded = (b"mandos" + password.replace(b"\\", b"\\\\")

182

.replace(b"\n", b"\\n")

183

.replace(b"\0", b"\\x00"))

184

return encoded

174

return b"mandos" + binascii.hexlify(password)

185

175

186

176

def encrypt(self, data, password):

187

passphrase = self.password_encode(password)

188

with tempfile.NamedTemporaryFile(dir=self.tempdir

189

) as passfile:

190

passfile.write(passphrase)

191

passfile.flush()

192

proc = subprocess.Popen(['gpg', '--symmetric',

193

'--passphrase-file',

194

passfile.name]

195

+ self.gnupgargs,

196

stdin = subprocess.PIPE,

197

stdout = subprocess.PIPE,

198

stderr = subprocess.PIPE)

199

ciphertext, err = proc.communicate(input = data)

200

if proc.returncode != 0:

201

raise PGPError(err)

177

self.gnupg.passphrase = self.password_encode(password)

178

with open(os.devnull) as devnull:

179

try:

180

proc = self.gnupg.run(['--symmetric'],

181

create_fhs=['stdin', 'stdout'],

182

attach_fhs={'stderr': devnull})

183

with contextlib.closing(proc.handles['stdin']) as f:

184

f.write(data)

185

with contextlib.closing(proc.handles['stdout']) as f:

186

ciphertext = f.read()

187

proc.wait()

188

except IOError as e:

189

raise PGPError(e)

190

self.gnupg.passphrase = None

202

191

return ciphertext

203

192

204

193

def decrypt(self, data, password):

205

passphrase = self.password_encode(password)

206

with tempfile.NamedTemporaryFile(dir = self.tempdir

207

) as passfile:

208

passfile.write(passphrase)

209

passfile.flush()

210

proc = subprocess.Popen(['gpg', '--decrypt',

211

'--passphrase-file',

212

passfile.name]

213

+ self.gnupgargs,

214

stdin = subprocess.PIPE,

215

stdout = subprocess.PIPE,

216

stderr = subprocess.PIPE)

217

decrypted_plaintext, err = proc.communicate(input

218

= data)

219

if proc.returncode != 0:

220

raise PGPError(err)

194

self.gnupg.passphrase = self.password_encode(password)

195

with open(os.devnull) as devnull:

196

try:

197

proc = self.gnupg.run(['--decrypt'],

198

create_fhs=['stdin', 'stdout'],

199

attach_fhs={'stderr': devnull})

200

with contextlib.closing(proc.handles['stdin'] ) as f:

201

f.write(data)

202

with contextlib.closing(proc.handles['stdout']) as f:

203

decrypted_plaintext = f.read()

204

proc.wait()

205

except IOError as e:

206

raise PGPError(e)

207

self.gnupg.passphrase = None

221

208

return decrypted_plaintext

222

209

223

210

211

224

212

class AvahiError(Exception):

225

213

def __init__(self, value, *args, **kwargs):

226

214

self.value = value

243

231

Used to optionally bind to the specified interface.

244

232

name: string; Example: 'Mandos'

245

233

type: string; Example: '_mandos._tcp'.

246

See <https://www.iana.org/assignments/service-names-port-numbers>

234

See <http://www.dns-sd.org/ServiceTypes.html>

247

235

port: integer; what port to announce

248

236

TXT: list of strings; TXT record for the service

249

237

domain: string; Domain to publish on, default to .local if empty.

255

243

server: D-Bus Server

256

244

bus: dbus.SystemBus()

257

245

"""

258

259

246

def __init__(self, interface = avahi.IF_UNSPEC, name = None,

260

247

servicetype = None, port = None, TXT = None,

261

248

domain = "", host = "", max_renames = 32768,

274

261

self.server = None

275

262

self.bus = bus

276

263

self.entry_group_state_changed_match = None

277

278

264

def rename(self):

279

265

"""Derived from the Avahi example code"""

280

266

if self.rename_count >= self.max_renames:

290

276

try:

291

277

self.add()

292

278

except dbus.exceptions.DBusException as error:

293

logger.critical("D-Bus Exception", exc_info=error)

279

logger.critical("DBusException: %s", error)

294

280

self.cleanup()

295

281

os._exit(1)

296

282

self.rename_count += 1

297

298

283

def remove(self):

299

284

"""Derived from the Avahi example code"""

300

285

if self.entry_group_state_changed_match is not None:

302

287

self.entry_group_state_changed_match = None

303

288

if self.group is not None:

304

289

self.group.Reset()

305

306

290

def add(self):

307

291

"""Derived from the Avahi example code"""

308

292

self.remove()

325

309

dbus.UInt16(self.port),

326

310

avahi.string_array_to_txt_array(self.TXT))

327

311

self.group.Commit()

328

329

312

def entry_group_state_changed(self, state, error):

330

313

"""Derived from the Avahi example code"""

331

314

logger.debug("Avahi entry group state change: %i", state)

338

321

elif state == avahi.ENTRY_GROUP_FAILURE:

339

322

logger.critical("Avahi: Error in group state changed %s",

340

323

unicode(error))

341

raise AvahiGroupError("State changed: {0!s}"

342

.format(error))

343

324

raise AvahiGroupError("State changed: %s"

325

% unicode(error))

344

326

def cleanup(self):

345

327

"""Derived from the Avahi example code"""

346

328

if self.group is not None:

351

333

pass

352

334

self.group = None

353

335

self.remove()

354

355

336

def server_state_changed(self, state, error=None):

356

337

"""Derived from the Avahi example code"""

357

338

logger.debug("Avahi server state change: %i", state)

376

357

logger.debug("Unknown state: %r", state)

377

358

else:

378

359

logger.debug("Unknown state: %r: %r", state, error)

379

380

360

def activate(self):

381

361

"""Derived from the Avahi example code"""

382

362

if self.server is None:

389

369

self.server_state_changed)

390

370

self.server_state_changed(self.server.GetState())

391

371

392

393

372

class AvahiServiceToSyslog(AvahiService):

394

373

def rename(self):

395

374

"""Add the new name to the syslog messages"""

396

375

ret = AvahiService.rename(self)

397

376

syslogger.setFormatter(logging.Formatter

398

('Mandos ({0}) [%(process)d]:'

399

' %(levelname)s: %(message)s'

400

.format(self.name)))

377

('Mandos (%s) [%%(process)d]:'

378

' %%(levelname)s: %%(message)s'

379

% self.name))

401

380

return ret

402

381

403

404

382

def timedelta_to_milliseconds(td):

405

383

"Convert a datetime.timedelta() to milliseconds"

406

384

return ((td.days * 24 * 60 * 60 * 1000)

407

385

+ (td.seconds * 1000)

408

386

+ (td.microseconds // 1000))

409

410

387

411

388

class Client(object):

412

389

"""A representation of a client host served by this server.

413

390

438

415

last_checked_ok: datetime.datetime(); (UTC) or None

439

416

last_checker_status: integer between 0 and 255 reflecting exit

440

417

status of last checker. -1 reflects crashed

441

checker, -2 means no checker completed yet.

418

checker, or None.

442

419

last_enabled: datetime.datetime(); (UTC) or None

443

420

name: string; from the config file, used in log messages and

444

421

D-Bus identifiers

445

422

secret: bytestring; sent verbatim (over TLS) to client

446

423

timeout: datetime.timedelta(); How long from last_checked_ok

447

424

until this client is disabled

448

extended_timeout: extra long timeout when secret has been sent

425

extended_timeout: extra long timeout when password has been sent

449

426

runtime_expansions: Allowed attributes for runtime expansion.

450

427

expires: datetime.datetime(); time (UTC) when a client will be

451

428

disabled, or None

452

server_settings: The server_settings dict from main()

453

429

"""

454

430

455

431

runtime_expansions = ("approval_delay", "approval_duration",

456

"created", "enabled", "expires",

457

"fingerprint", "host", "interval",

458

"last_approval_request", "last_checked_ok",

432

"created", "enabled", "fingerprint",

433

"host", "interval", "last_checked_ok",

459

434

"last_enabled", "name", "timeout")

460

client_defaults = { "timeout": "PT5M",

461

"extended_timeout": "PT15M",

462

"interval": "PT2M",

435

client_defaults = { "timeout": "5m",

436

"extended_timeout": "15m",

437

"interval": "2m",

463

438

"checker": "fping -q -- %%(host)s",

464

439

"host": "",

465

"approval_delay": "PT0S",

466

"approval_duration": "PT1S",

440

"approval_delay": "0s",

441

"approval_duration": "1s",

467

442

"approved_by_default": "True",

468

443

"enabled": "True",

469

444

}

482

457

483

458

def approval_delay_milliseconds(self):

484

459

return timedelta_to_milliseconds(self.approval_delay)

485

460

486

461

@staticmethod

487

462

def config_parser(config):

488

463

"""Construct a new dict of client settings of this form:

513

488

"rb") as secfile:

514

489

client["secret"] = secfile.read()

515

490

else:

516

raise TypeError("No secret or secfile for section {0}"

517

.format(section))

491

raise TypeError("No secret or secfile for section %s"

492

% section)

518

493

client["timeout"] = string_to_delta(section["timeout"])

519

494

client["extended_timeout"] = string_to_delta(

520

495

section["extended_timeout"])

526

501

client["checker_command"] = section["checker"]

527

502

client["last_approval_request"] = None

528

503

client["last_checked_ok"] = None

529

client["last_checker_status"] = -2

504

client["last_checker_status"] = None

530

505

531

506

return settings

532

533

def __init__(self, settings, name = None, server_settings=None):

507

508

509

def __init__(self, settings, name = None):

510

"""Note: the 'checker' key in 'config' sets the

511

'checker_command' attribute and *not* the 'checker'

512

attribute."""

534

513

self.name = name

535

if server_settings is None:

536

server_settings = {}

537

self.server_settings = server_settings

538

514

# adding all client settings

539

515

for setting, value in settings.iteritems():

540

516

setattr(self, setting, value)

548

524

else:

549

525

self.last_enabled = None

550

526

self.expires = None

551

527

552

528

logger.debug("Creating client %r", self.name)

553

529

# Uppercase and remove spaces from fingerprint for later

554

530

# comparison purposes with return value from the fingerprint()

556

532

logger.debug(" Fingerprint: %s", self.fingerprint)

557

533

self.created = settings.get("created",

558

534

datetime.datetime.utcnow())

559

535

560

536

# attributes specific for this server instance

561

537

self.checker = None

562

538

self.checker_initiator_tag = None

590

566

if getattr(self, "enabled", False):

591

567

# Already enabled

592

568

return

569

self.send_changedstate()

593

570

self.expires = datetime.datetime.utcnow() + self.timeout

594

571

self.enabled = True

595

572

self.last_enabled = datetime.datetime.utcnow()

596

573

self.init_checker()

597

self.send_changedstate()

598

574

599

575

def disable(self, quiet=True):

600

576

"""Disable this client."""

601

577

if not getattr(self, "enabled", False):

602

578

return False

603

579

if not quiet:

580

self.send_changedstate()

581

if not quiet:

604

582

logger.info("Disabling client %s", self.name)

605

if getattr(self, "disable_initiator_tag", None) is not None:

583

if getattr(self, "disable_initiator_tag", False):

606

584

gobject.source_remove(self.disable_initiator_tag)

607

585

self.disable_initiator_tag = None

608

586

self.expires = None

609

if getattr(self, "checker_initiator_tag", None) is not None:

587

if getattr(self, "checker_initiator_tag", False):

610

588

gobject.source_remove(self.checker_initiator_tag)

611

589

self.checker_initiator_tag = None

612

590

self.stop_checker()

613

591

self.enabled = False

614

if not quiet:

615

self.send_changedstate()

616

592

# Do not run this again if called by a gobject.timeout_add

617

593

return False

618

594

622

598

def init_checker(self):

623

599

# Schedule a new checker to be started an 'interval' from now,

624

600

# and every interval from then on.

625

if self.checker_initiator_tag is not None:

626

gobject.source_remove(self.checker_initiator_tag)

627

601

self.checker_initiator_tag = (gobject.timeout_add

628

602

(self.interval_milliseconds(),

629

603

self.start_checker))

630

604

# Schedule a disable() when 'timeout' has passed

631

if self.disable_initiator_tag is not None:

632

gobject.source_remove(self.disable_initiator_tag)

633

605

self.disable_initiator_tag = (gobject.timeout_add

634

606

(self.timeout_milliseconds(),

635

607

self.disable))

654

626

logger.warning("Checker for %(name)s crashed?",

655

627

vars(self))

656

628

657

def checked_ok(self):

658

"""Assert that the client has been seen, alive and well."""

659

self.last_checked_ok = datetime.datetime.utcnow()

660

self.last_checker_status = 0

661

self.bump_timeout()

662

663

def bump_timeout(self, timeout=None):

664

"""Bump up the timeout for this client."""

629

def checked_ok(self, timeout=None):

630

"""Bump up the timeout for this client.

631

632

This should only be called when the client has been seen,

633

alive and well.

634

"""

665

635

if timeout is None:

666

636

timeout = self.timeout

637

self.last_checked_ok = datetime.datetime.utcnow()

667

638

if self.disable_initiator_tag is not None:

668

639

gobject.source_remove(self.disable_initiator_tag)

669

self.disable_initiator_tag = None

670

640

if getattr(self, "enabled", False):

671

641

self.disable_initiator_tag = (gobject.timeout_add

672

642

(timedelta_to_milliseconds

682

652

If a checker already exists, leave it running and do

683

653

nothing."""

684

654

# The reason for not killing a running checker is that if we

685

# did that, and if a checker (for some reason) started running

686

# slowly and taking more than 'interval' time, then the client

687

# would inevitably timeout, since no checker would get a

688

# chance to run to completion. If we instead leave running

655

# did that, then if a checker (for some reason) started

656

# running slowly and taking more than 'interval' time, the

657

# client would inevitably timeout, since no checker would get

658

# a chance to run to completion. If we instead leave running

689

659

# checkers alone, the checker would have to take more time

690

660

# than 'timeout' for the client to be disabled, which is as it

691

661

# should be.

693

663

# If a checker exists, make sure it is not a zombie

694

664

try:

695

665

pid, status = os.waitpid(self.checker.pid, os.WNOHANG)

696

except AttributeError:

697

pass

698

except OSError as error:

699

if error.errno != errno.ECHILD:

700

raise

666

except (AttributeError, OSError) as error:

667

if (isinstance(error, OSError)

668

and error.errno != errno.ECHILD):

669

raise error

701

670

else:

702

671

if pid:

703

672

logger.warning("Checker was a zombie")

706

675

self.current_checker_command)

707

676

# Start a new checker if needed

708

677

if self.checker is None:

709

# Escape attributes for the shell

710

escaped_attrs = dict(

711

(attr, re.escape(unicode(getattr(self, attr))))

712

for attr in

713

self.runtime_expansions)

714

678

try:

715

command = self.checker_command % escaped_attrs

716

except TypeError as error:

717

logger.error('Could not format string "%s"',

718

self.checker_command, exc_info=error)

719

return True # Try again later

679

# In case checker_command has exactly one % operator

680

command = self.checker_command % self.host

681

except TypeError:

682

# Escape attributes for the shell

683

escaped_attrs = dict(

684

(attr,

685

re.escape(unicode(str(getattr(self, attr, "")),

686

errors=

687

'replace')))

688

for attr in

689

self.runtime_expansions)

690

691

try:

692

command = self.checker_command % escaped_attrs

693

except TypeError as error:

694

logger.error('Could not format string "%s":'

695

' %s', self.checker_command, error)

696

return True # Try again later

720

697

self.current_checker_command = command

721

698

try:

722

699

logger.info("Starting checker %r for %s",

725

702

# in normal mode, that is already done by daemon(),

726

703

# and in debug mode we don't want to. (Stdin is

727

704

# always replaced by /dev/null.)

728

# The exception is when not debugging but nevertheless

729

# running in the foreground; use the previously

730

# created wnull.

731

popen_args = {}

732

if (not self.server_settings["debug"]

733

and self.server_settings["foreground"]):

734

popen_args.update({"stdout": wnull,

735

"stderr": wnull })

736

705

self.checker = subprocess.Popen(command,

737

706

close_fds=True,

738

shell=True, cwd="/",

739

**popen_args)

740

except OSError as error:

741

logger.error("Failed to start subprocess",

742

exc_info=error)

743

return True

744

self.checker_callback_tag = (gobject.child_watch_add

745

(self.checker.pid,

746

self.checker_callback,

747

data=command))

748

# The checker may have completed before the gobject

749

# watch was added. Check for this.

750

try:

707

shell=True, cwd="/")

708

self.checker_callback_tag = (gobject.child_watch_add

709

(self.checker.pid,

710

self.checker_callback,

711

data=command))

712

# The checker may have completed before the gobject

713

# watch was added. Check for this.

751

714

pid, status = os.waitpid(self.checker.pid, os.WNOHANG)

715

if pid:

716

gobject.source_remove(self.checker_callback_tag)

717

self.checker_callback(pid, status, command)

752

718

except OSError as error:

753

if error.errno == errno.ECHILD:

754

# This should never happen

755

logger.error("Child process vanished",

756

exc_info=error)

757

return True

758

raise

759

if pid:

760

gobject.source_remove(self.checker_callback_tag)

761

self.checker_callback(pid, status, command)

719

logger.error("Failed to start subprocess: %s",

720

error)

762

721

# Re-run this periodically if run by gobject.timeout_add

763

722

return True

764

723

771

730

return

772

731

logger.debug("Stopping checker for %(name)s", vars(self))

773

732

try:

774

self.checker.terminate()

733

os.kill(self.checker.pid, signal.SIGTERM)

775

734

#time.sleep(0.5)

776

735

#if self.checker.poll() is None:

777

# self.checker.kill()

736

# os.kill(self.checker.pid, signal.SIGKILL)

778

737

except OSError as error:

779

738

if error.errno != errno.ESRCH: # No such process

780

739

raise

797

756

# "Set" method, so we fail early here:

798

757

if byte_arrays and signature != "ay":

799

758

raise ValueError("Byte arrays not supported for non-'ay'"

800

" signature {0!r}".format(signature))

759

" signature %r" % signature)

801

760

def decorator(func):

802

761

func._dbus_is_property = True

803

762

func._dbus_interface = dbus_interface

811

770

return decorator

812

771

813

772

814

def dbus_interface_annotations(dbus_interface):

815

"""Decorator for marking functions returning interface annotations

816

817

Usage:

818

819

@dbus_interface_annotations("org.example.Interface")

820

def _foo(self): # Function name does not matter

821

return {"org.freedesktop.DBus.Deprecated": "true",

822

"org.freedesktop.DBus.Property.EmitsChangedSignal":

823

"false"}

824

"""

825

def decorator(func):

826

func._dbus_is_interface = True

827

func._dbus_interface = dbus_interface

828

func._dbus_name = dbus_interface

829

return func

830

return decorator

831

832

833

def dbus_annotations(annotations):

834

"""Decorator to annotate D-Bus methods, signals or properties

835

Usage:

836

837

@dbus_service_property("org.example.Interface", signature="b",

838

access="r")

839

@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",

840

"org.freedesktop.DBus.Property."

841

"EmitsChangedSignal": "false"})

842

def Property_dbus_property(self):

843

return dbus.Boolean(False)

844

"""

845

def decorator(func):

846

func._dbus_annotations = annotations

847

return func

848

return decorator

849

850

851

773

class DBusPropertyException(dbus.exceptions.DBusException):

852

774

"""A base class for D-Bus property-related exceptions

853

775

"""

876

798

"""

877

799

878

800

@staticmethod

879

def _is_dbus_thing(thing):

880

"""Returns a function testing if an attribute is a D-Bus thing

881

882

If called like _is_dbus_thing("method") it returns a function

883

suitable for use as predicate to inspect.getmembers().

884

"""

885

return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),

886

False)

801

def _is_dbus_property(obj):

802

return getattr(obj, "_dbus_is_property", False)

887

803

888

def _get_all_dbus_things(self, thing):

804

def _get_all_dbus_properties(self):

889

805

"""Returns a generator of (name, attribute) pairs

890

806

"""

891

return ((getattr(athing.__get__(self), "_dbus_name",

892

name),

893

athing.__get__(self))

807

return ((prop.__get__(self)._dbus_name, prop.__get__(self))

894

808

for cls in self.__class__.__mro__

895

for name, athing in

896

inspect.getmembers(cls,

897

self._is_dbus_thing(thing)))

809

for name, prop in

810

inspect.getmembers(cls, self._is_dbus_property))

898

811

899

812

def _get_dbus_property(self, interface_name, property_name):

900

813

"""Returns a bound method if one exists which is a D-Bus

902

815

"""

903

816

for cls in self.__class__.__mro__:

904

817

for name, value in (inspect.getmembers

905

(cls,

906

self._is_dbus_thing("property"))):

818

(cls, self._is_dbus_property)):

907

819

if (value._dbus_name == property_name

908

820

and value._dbus_interface == interface_name):

909

821

return value.__get__(self)

937

849

# The byte_arrays option is not supported yet on

938

850

# signatures other than "ay".

939

851

if prop._dbus_signature != "ay":

940

raise ValueError("Byte arrays not supported for non-"

941

"'ay' signature {0!r}"

942

.format(prop._dbus_signature))

852

raise ValueError

943

853

value = dbus.ByteArray(b''.join(chr(byte)

944

854

for byte in value))

945

855

prop(value)

953

863

Note: Will not include properties with access="write".

954

864

"""

955

865

properties = {}

956

for name, prop in self._get_all_dbus_things("property"):

866

for name, prop in self._get_all_dbus_properties():

957

867

if (interface_name

958

868

and interface_name != prop._dbus_interface):

959

869

# Interface non-empty but did not match

974

884

path_keyword='object_path',

975

885

connection_keyword='connection')

976

886

def Introspect(self, object_path, connection):

977

"""Overloading of standard D-Bus method.

978

979

Inserts property tags and interface annotation tags.

887

"""Standard D-Bus method, overloaded to insert property tags.

980

888

"""

981

889

xmlstring = dbus.service.Object.Introspect(self, object_path,

982

890

connection)

989

897

e.setAttribute("access", prop._dbus_access)

990

898

return e

991

899

for if_tag in document.getElementsByTagName("interface"):

992

# Add property tags

993

900

for tag in (make_tag(document, name, prop)

994

901

for name, prop

995

in self._get_all_dbus_things("property")

902

in self._get_all_dbus_properties()

996

903

if prop._dbus_interface

997

904

== if_tag.getAttribute("name")):

998

905

if_tag.appendChild(tag)

999

# Add annotation tags

1000

for typ in ("method", "signal", "property"):

1001

for tag in if_tag.getElementsByTagName(typ):

1002

annots = dict()

1003

for name, prop in (self.

1004

_get_all_dbus_things(typ)):

1005

if (name == tag.getAttribute("name")

1006

and prop._dbus_interface

1007

== if_tag.getAttribute("name")):

1008

annots.update(getattr

1009

(prop,

1010

"_dbus_annotations",

1011

{}))

1012

for name, value in annots.iteritems():

1013

ann_tag = document.createElement(

1014

"annotation")

1015

ann_tag.setAttribute("name", name)

1016

ann_tag.setAttribute("value", value)

1017

tag.appendChild(ann_tag)

1018

# Add interface annotation tags

1019

for annotation, value in dict(

1020

itertools.chain.from_iterable(

1021

annotations().iteritems()

1022

for name, annotations in

1023

self._get_all_dbus_things("interface")

1024

if name == if_tag.getAttribute("name")

1025

)).iteritems():

1026

ann_tag = document.createElement("annotation")

1027

ann_tag.setAttribute("name", annotation)

1028

ann_tag.setAttribute("value", value)

1029

if_tag.appendChild(ann_tag)

1030

906

# Add the names to the return values for the

1031

907

# "org.freedesktop.DBus.Properties" methods

1032

908

if (if_tag.getAttribute("name")

1047

923

except (AttributeError, xml.dom.DOMException,

1048

924

xml.parsers.expat.ExpatError) as error:

1049

925

logger.error("Failed to override Introspection method",

1050

exc_info=error)

926

error)

1051

927

return xmlstring

1052

928

1053

929

1054

def datetime_to_dbus(dt, variant_level=0):

930

def datetime_to_dbus (dt, variant_level=0):

1055

931

"""Convert a UTC datetime.datetime() to a D-Bus type."""

1056

932

if dt is None:

1057

933

return dbus.String("", variant_level = variant_level)

1059

935

variant_level=variant_level)

1060

936

1061

937

1062

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1063

"""A class decorator; applied to a subclass of

1064

dbus.service.Object, it will add alternate D-Bus attributes with

1065

interface names according to the "alt_interface_names" mapping.

1066

Usage:

1067

1068

@alternate_dbus_interfaces({"org.example.Interface":

1069

"net.example.AlternateInterface"})

1070

class SampleDBusObject(dbus.service.Object):

1071

@dbus.service.method("org.example.Interface")

1072

def SampleDBusMethod():

1073

pass

1074

1075

The above "SampleDBusMethod" on "SampleDBusObject" will be

1076

reachable via two interfaces: "org.example.Interface" and

1077

"net.example.AlternateInterface", the latter of which will have

1078

its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to

1079

"true", unless "deprecate" is passed with a False value.

1080

1081

This works for methods and signals, and also for D-Bus properties

1082

(from DBusObjectWithProperties) and interfaces (from the

1083

dbus_interface_annotations decorator).

938

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

939

.__metaclass__):

940

"""Applied to an empty subclass of a D-Bus object, this metaclass

941

will add additional D-Bus attributes matching a certain pattern.

1084

942

"""

1085

def wrapper(cls):

1086

for orig_interface_name, alt_interface_name in (

1087

alt_interface_names.iteritems()):

1088

attr = {}

1089

interface_names = set()

1090

# Go though all attributes of the class

1091

for attrname, attribute in inspect.getmembers(cls):

943

def __new__(mcs, name, bases, attr):

944

# Go through all the base classes which could have D-Bus

945

# methods, signals, or properties in them

946

for base in (b for b in bases

947

if issubclass(b, dbus.service.Object)):

948

# Go though all attributes of the base class

949

for attrname, attribute in inspect.getmembers(base):

1092

950

# Ignore non-D-Bus attributes, and D-Bus attributes

1093

951

# with the wrong interface name

1094

952

if (not hasattr(attribute, "_dbus_interface")

1095

953

or not attribute._dbus_interface

1096

.startswith(orig_interface_name)):

954

.startswith("se.recompile.Mandos")):

1097

955

continue

1098

956

# Create an alternate D-Bus interface name based on

1099

957

# the current name

1100

958

alt_interface = (attribute._dbus_interface

1101

.replace(orig_interface_name,

1102

alt_interface_name))

1103

interface_names.add(alt_interface)

959

.replace("se.recompile.Mandos",

960

"se.bsnet.fukt.Mandos"))

1104

961

# Is this a D-Bus signal?

1105

962

if getattr(attribute, "_dbus_is_signal", False):

1106

# Extract the original non-method undecorated

1107

# function by black magic

963

# Extract the original non-method function by

964

# black magic

1108

965

nonmethod_func = (dict(

1109

966

zip(attribute.func_code.co_freevars,

1110

967

attribute.__closure__))["func"]

1121

978

nonmethod_func.func_name,

1122

979

nonmethod_func.func_defaults,

1123

980

nonmethod_func.func_closure)))

1124

# Copy annotations, if any

1125

try:

1126

new_function._dbus_annotations = (

1127

dict(attribute._dbus_annotations))

1128

except AttributeError:

1129

pass

1130

981

# Define a creator of a function to call both the

1131

# original and alternate functions, so both the

1132

# original and alternate signals gets sent when

1133

# the function is called

982

# old and new functions, so both the old and new

983

# signals gets sent when the function is called

1134

984

def fixscope(func1, func2):

1135

985

"""This function is a scope container to pass

1136

986

func1 and func2 to the "call_both" function

1143

993

return call_both

1144

994

# Create the "call_both" function and add it to

1145

995

# the class

1146

attr[attrname] = fixscope(attribute, new_function)

996

attr[attrname] = fixscope(attribute,

997

new_function)

1147

998

# Is this a D-Bus method?

1148

999

elif getattr(attribute, "_dbus_is_method", False):

1149

1000

# Create a new, but exactly alike, function

1160

1011

attribute.func_name,

1161

1012

attribute.func_defaults,

1162

1013

attribute.func_closure)))

1163

# Copy annotations, if any

1164

try:

1165

attr[attrname]._dbus_annotations = (

1166

dict(attribute._dbus_annotations))

1167

except AttributeError:

1168

pass

1169

1014

# Is this a D-Bus property?

1170

1015

elif getattr(attribute, "_dbus_is_property", False):

1171

1016

# Create a new, but exactly alike, function

1185

1030

attribute.func_name,

1186

1031

attribute.func_defaults,

1187

1032

attribute.func_closure)))

1188

# Copy annotations, if any

1189

try:

1190

attr[attrname]._dbus_annotations = (

1191

dict(attribute._dbus_annotations))

1192

except AttributeError:

1193

pass

1194

# Is this a D-Bus interface?

1195

elif getattr(attribute, "_dbus_is_interface", False):

1196

# Create a new, but exactly alike, function

1197

# object. Decorate it to be a new D-Bus interface

1198

# with the alternate D-Bus interface name. Add it

1199

# to the class.

1200

attr[attrname] = (dbus_interface_annotations

1201

(alt_interface)

1202

(types.FunctionType

1203

(attribute.func_code,

1204

attribute.func_globals,

1205

attribute.func_name,

1206

attribute.func_defaults,

1207

attribute.func_closure)))

1208

if deprecate:

1209

# Deprecate all alternate interfaces

1210

iname="_AlternateDBusNames_interface_annotation{0}"

1211

for interface_name in interface_names:

1212

@dbus_interface_annotations(interface_name)

1213

def func(self):

1214

return { "org.freedesktop.DBus.Deprecated":

1215

"true" }

1216

# Find an unused name

1217

for aname in (iname.format(i)

1218

for i in itertools.count()):

1219

if aname not in attr:

1220

attr[aname] = func

1221

break

1222

if interface_names:

1223

# Replace the class with a new subclass of it with

1224

# methods, signals, etc. as created above.

1225

cls = type(b"{0}Alternate".format(cls.__name__),

1226

(cls,), attr)

1227

return cls

1228

return wrapper

1229

1230

1231

@alternate_dbus_interfaces({"se.recompile.Mandos":

1232

"se.bsnet.fukt.Mandos"})

1033

return type.__new__(mcs, name, bases, attr)

1034

1035

1233

1036

class ClientDBus(Client, DBusObjectWithProperties):

1234

1037

"""A Client class using D-Bus

1235

1038

1246

1049

def __init__(self, bus = None, *args, **kwargs):

1247

1050

self.bus = bus

1248

1051

Client.__init__(self, *args, **kwargs)

1052

self._approvals_pending = 0

1053

1054

self._approvals_pending = 0

1249

1055

# Only now, when this client is initialized, can it show up on

1250

1056

# the D-Bus

1251

1057

client_object_name = unicode(self.name).translate(

1255

1061

("/clients/" + client_object_name))

1256

1062

DBusObjectWithProperties.__init__(self, self.bus,

1257

1063

self.dbus_object_path)

1258

1064

1259

1065

def notifychangeproperty(transform_func,

1260

1066

dbus_name, type_func=lambda x: x,

1261

1067

variant_level=1):

1284

1090

1285

1091

return property(lambda self: getattr(self, attrname), setter)

1286

1092

1093

1287

1094

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1288

1095

approvals_pending = notifychangeproperty(dbus.Boolean,

1289

1096

"ApprovalPending",

1296

1103

checker is not None)

1297

1104

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1298

1105

"LastCheckedOK")

1299

last_checker_status = notifychangeproperty(dbus.Int16,

1300

"LastCheckerStatus")

1301

1106

last_approval_request = notifychangeproperty(

1302

1107

datetime_to_dbus, "LastApprovalRequest")

1303

1108

approved_by_default = notifychangeproperty(dbus.Boolean,

1353

1158

*args, **kwargs)

1354

1159

1355

1160

def start_checker(self, *args, **kwargs):

1356

old_checker_pid = getattr(self.checker, "pid", None)

1161

old_checker = self.checker

1162

if self.checker is not None:

1163

old_checker_pid = self.checker.pid

1164

else:

1165

old_checker_pid = None

1357

1166

r = Client.start_checker(self, *args, **kwargs)

1358

1167

# Only if new checker process was started

1359

1168

if (self.checker is not None

1367

1176

return False

1368

1177

1369

1178

def approve(self, value=True):

1179

self.send_changedstate()

1370

1180

self.approved = value

1371

1181

gobject.timeout_add(timedelta_to_milliseconds

1372

1182

(self.approval_duration),

1373

1183

self._reset_approved)

1374

self.send_changedstate()

1184

1375

1185

1376

1186

## D-Bus methods, signals & properties

1377

1187

_interface = "se.recompile.Mandos.Client"

1378

1188

1379

## Interfaces

1380

1381

@dbus_interface_annotations(_interface)

1382

def _foo(self):

1383

return { "org.freedesktop.DBus.Property.EmitsChangedSignal":

1384

"false"}

1385

1386

1189

## Signals

1387

1190

1388

1191

# CheckerCompleted - signal

1424

1227

"D-Bus signal"

1425

1228

return self.need_approval()

1426

1229

1230

# NeRwequest - signal

1231

@dbus.service.signal(_interface, signature="s")

1232

def NewRequest(self, ip):

1233

"""D-Bus signal

1234

Is sent after a client request a password.

1235

"""

1236

pass

1237

1427

1238

## Methods

1428

1239

1429

1240

# Approve - method

1539

1350

return

1540

1351

return datetime_to_dbus(self.last_checked_ok)

1541

1352

1542

# LastCheckerStatus - property

1543

@dbus_service_property(_interface, signature="n",

1544

access="read")

1545

def LastCheckerStatus_dbus_property(self):

1546

return dbus.Int16(self.last_checker_status)

1547

1548

1353

# Expires - property

1549

1354

@dbus_service_property(_interface, signature="s", access="read")

1550

1355

def Expires_dbus_property(self):

1561

1366

def Timeout_dbus_property(self, value=None):

1562

1367

if value is None: # get

1563

1368

return dbus.UInt64(self.timeout_milliseconds())

1564

old_timeout = self.timeout

1565

1369

self.timeout = datetime.timedelta(0, 0, 0, value)

1566

# Reschedule disabling

1370

# Reschedule timeout

1567

1371

if self.enabled:

1568

1372

now = datetime.datetime.utcnow()

1569

self.expires += self.timeout - old_timeout

1570

if self.expires <= now:

1373

time_to_die = timedelta_to_milliseconds(

1374

(self.last_checked_ok + self.timeout) - now)

1375

if time_to_die <= 0:

1571

1376

# The timeout has passed

1572

1377

self.disable()

1573

1378

else:

1379

self.expires = (now +

1380

datetime.timedelta(milliseconds =

1381

time_to_die))

1574

1382

if (getattr(self, "disable_initiator_tag", None)

1575

1383

is None):

1576

1384

return

1577

1385

gobject.source_remove(self.disable_initiator_tag)

1578

self.disable_initiator_tag = (

1579

gobject.timeout_add(

1580

timedelta_to_milliseconds(self.expires - now),

1581

self.disable))

1386

self.disable_initiator_tag = (gobject.timeout_add

1387

(time_to_die,

1388

self.disable))

1582

1389

1583

1390

# ExtendedTimeout - property

1584

1391

@dbus_service_property(_interface, signature="t",

1663

1470

self._pipe.send(('setattr', name, value))

1664

1471

1665

1472

1473

class ClientDBusTransitional(ClientDBus):

1474

__metaclass__ = AlternateDBusNamesMetaclass

1475

1476

1666

1477

class ClientHandler(socketserver.BaseRequestHandler, object):

1667

1478

"""A class to handle client connections.

1668

1479

1704

1515

logger.debug("Protocol version: %r", line)

1705

1516

try:

1706

1517

if int(line.strip().split()[0]) > 1:

1707

raise RuntimeError(line)

1518

raise RuntimeError

1708

1519

except (ValueError, IndexError, RuntimeError) as error:

1709

1520

logger.error("Unknown protocol version: %s", error)

1710

1521

return

1736

1547

except KeyError:

1737

1548

return

1738

1549

1550

if self.server.use_dbus:

1551

# Emit D-Bus signal

1552

client.NewRequest(str(self.client_address))

1553

1739

1554

if client.approval_delay:

1740

1555

delay = client.approval_delay

1741

1556

client.approvals_pending += 1

1772

1587

#wait until timeout or approved

1773

1588

time = datetime.datetime.now()

1774

1589

client.changedstate.acquire()

1775

client.changedstate.wait(

1776

float(timedelta_to_milliseconds(delay)

1777

/ 1000))

1590

(client.changedstate.wait

1591

(float(client.timedelta_to_milliseconds(delay)

1592

/ 1000)))

1778

1593

client.changedstate.release()

1779

1594

time2 = datetime.datetime.now()

1780

1595

if (time2 - time) >= delay:

1796

1611

try:

1797

1612

sent = session.send(client.secret[sent_size:])

1798

1613

except gnutls.errors.GNUTLSError as error:

1799

logger.warning("gnutls send failed",

1800

exc_info=error)

1614

logger.warning("gnutls send failed")

1801

1615

return

1802

1616

logger.debug("Sent: %d, remaining: %d",

1803

1617

sent, len(client.secret)

1806

1620

1807

1621

logger.info("Sending secret to %s", client.name)

1808

1622

# bump the timeout using extended_timeout

1809

client.bump_timeout(client.extended_timeout)

1623

client.checked_ok(client.extended_timeout)

1810

1624

if self.server.use_dbus:

1811

1625

# Emit D-Bus signal

1812

1626

client.GotSecret()

1817

1631

try:

1818

1632

session.bye()

1819

1633

except gnutls.errors.GNUTLSError as error:

1820

logger.warning("GnuTLS bye failed",

1821

exc_info=error)

1634

logger.warning("GnuTLS bye failed")

1822

1635

1823

1636

@staticmethod

1824

1637

def peer_certificate(session):

1896

1709

def process_request(self, request, address):

1897

1710

"""Start a new process to process the request."""

1898

1711

proc = multiprocessing.Process(target = self.sub_process_main,

1899

args = (request, address))

1712

args = (request,

1713

address))

1900

1714

proc.start()

1901

1715

return proc

1902

1716

1917

1731

1918

1732

def add_pipe(self, parent_pipe, proc):

1919

1733

"""Dummy function; override as necessary"""

1920

raise NotImplementedError()

1734

raise NotImplementedError

1921

1735

1922

1736

1923

1737

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1930

1744

use_ipv6: Boolean; to use IPv6 or not

1931

1745

"""

1932

1746

def __init__(self, server_address, RequestHandlerClass,

1933

interface=None, use_ipv6=True, socketfd=None):

1934

"""If socketfd is set, use that file descriptor instead of

1935

creating a new one with socket.socket().

1936

"""

1747

interface=None, use_ipv6=True):

1937

1748

self.interface = interface

1938

1749

if use_ipv6:

1939

1750

self.address_family = socket.AF_INET6

1940

if socketfd is not None:

1941

# Save the file descriptor

1942

self.socketfd = socketfd

1943

# Save the original socket.socket() function

1944

self.socket_socket = socket.socket

1945

# To implement --socket, we monkey patch socket.socket.

1946

#

1947

# (When socketserver.TCPServer is a new-style class, we

1948

# could make self.socket into a property instead of monkey

1949

# patching socket.socket.)

1950

#

1951

# Create a one-time-only replacement for socket.socket()

1952

@functools.wraps(socket.socket)

1953

def socket_wrapper(*args, **kwargs):

1954

# Restore original function so subsequent calls are

1955

# not affected.

1956

socket.socket = self.socket_socket

1957

del self.socket_socket

1958

# This time only, return a new socket object from the

1959

# saved file descriptor.

1960

return socket.fromfd(self.socketfd, *args, **kwargs)

1961

# Replace socket.socket() function with wrapper

1962

socket.socket = socket_wrapper

1963

# The socketserver.TCPServer.__init__ will call

1964

# socket.socket(), which might be our replacement,

1965

# socket_wrapper(), if socketfd was set.

1966

1751

socketserver.TCPServer.__init__(self, server_address,

1967

1752

RequestHandlerClass)

1968

1969

1753

def server_bind(self):

1970

1754

"""This overrides the normal server_bind() function

1971

1755

to bind to an interface if one was specified, and also NOT to

1979

1763

try:

1980

1764

self.socket.setsockopt(socket.SOL_SOCKET,

1981

1765

SO_BINDTODEVICE,

1982

str(self.interface + '\0'))

1766

str(self.interface

1767

+ '\0'))

1983

1768

except socket.error as error:

1984

if error.errno == errno.EPERM:

1985

logger.error("No permission to bind to"

1986

" interface %s", self.interface)

1987

elif error.errno == errno.ENOPROTOOPT:

1769

if error[0] == errno.EPERM:

1770

logger.error("No permission to"

1771

" bind to interface %s",

1772

self.interface)

1773

elif error[0] == errno.ENOPROTOOPT:

1988

1774

logger.error("SO_BINDTODEVICE not available;"

1989

1775

" cannot bind to interface %s",

1990

1776

self.interface)

1991

elif error.errno == errno.ENODEV:

1992

logger.error("Interface %s does not exist,"

1993

" cannot bind", self.interface)

1994

1777

else:

1995

1778

raise

1996

1779

# Only bind(2) the socket if we really need to.

1999

1782

if self.address_family == socket.AF_INET6:

2000

1783

any_address = "::" # in6addr_any

2001

1784

else:

2002

any_address = "0.0.0.0" # INADDR_ANY

1785

any_address = socket.INADDR_ANY

2003

1786

self.server_address = (any_address,

2004

1787

self.server_address[1])

2005

1788

elif not self.server_address[1]:

2026

1809

"""

2027

1810

def __init__(self, server_address, RequestHandlerClass,

2028

1811

interface=None, use_ipv6=True, clients=None,

2029

gnutls_priority=None, use_dbus=True, socketfd=None):

1812

gnutls_priority=None, use_dbus=True):

2030

1813

self.enabled = False

2031

1814

self.clients = clients

2032

1815

if self.clients is None:

2036

1819

IPv6_TCPServer.__init__(self, server_address,

2037

1820

RequestHandlerClass,

2038

1821

interface = interface,

2039

use_ipv6 = use_ipv6,

2040

socketfd = socketfd)

1822

use_ipv6 = use_ipv6)

2041

1823

def server_activate(self):

2042

1824

if self.enabled:

2043

1825

return socketserver.TCPServer.server_activate(self)

2056

1838

2057

1839

def handle_ipc(self, source, condition, parent_pipe=None,

2058

1840

proc = None, client_object=None):

1841

condition_names = {

1842

gobject.IO_IN: "IN", # There is data to read.

1843

gobject.IO_OUT: "OUT", # Data can be written (without

1844

# blocking).

1845

gobject.IO_PRI: "PRI", # There is urgent data to read.

1846

gobject.IO_ERR: "ERR", # Error condition.

1847

gobject.IO_HUP: "HUP" # Hung up (the connection has been

1848

# broken, usually for pipes and

1849

# sockets).

1850

}

1851

conditions_string = ' | '.join(name

1852

for cond, name in

1853

condition_names.iteritems()

1854

if cond & condition)

2059

1855

# error, or the other end of multiprocessing.Pipe has closed

2060

if condition & (gobject.IO_ERR | gobject.IO_HUP):

1856

if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):

2061

1857

# Wait for other process to exit

2062

1858

proc.join()

2063

1859

return False

2121

1917

return True

2122

1918

2123

1919

2124

def rfc3339_duration_to_delta(duration):

2125

"""Parse an RFC 3339 "duration" and return a datetime.timedelta

2126

2127

>>> rfc3339_duration_to_delta("P7D")

2128

datetime.timedelta(7)

2129

>>> rfc3339_duration_to_delta("PT60S")

2130

datetime.timedelta(0, 60)

2131

>>> rfc3339_duration_to_delta("PT60M")

2132

datetime.timedelta(0, 3600)

2133

>>> rfc3339_duration_to_delta("PT24H")

2134

datetime.timedelta(1)

2135

>>> rfc3339_duration_to_delta("P1W")

2136

datetime.timedelta(7)

2137

>>> rfc3339_duration_to_delta("PT5M30S")

2138

datetime.timedelta(0, 330)

2139

>>> rfc3339_duration_to_delta("P1DT3M20S")

2140

datetime.timedelta(1, 200)

2141

"""

2142

2143

# Parsing an RFC 3339 duration with regular expressions is not

2144

# possible - there would have to be multiple places for the same

2145

# values, like seconds. The current code, while more esoteric, is

2146

# cleaner without depending on a parsing library. If Python had a

2147

# built-in library for parsing we would use it, but we'd like to

2148

# avoid excessive use of external libraries.

2149

2150

# New type for defining tokens, syntax, and semantics all-in-one

2151

Token = collections.namedtuple("Token",

2152

("regexp", # To match token; if

2153

# "value" is not None,

2154

# must have a "group"

2155

# containing digits

2156

"value", # datetime.timedelta or

2157

# None

2158

"followers")) # Tokens valid after

2159

# this token

2160

# RFC 3339 "duration" tokens, syntax, and semantics; taken from

2161

# the "duration" ABNF definition in RFC 3339, Appendix A.

2162

token_end = Token(re.compile(r"$"), None, frozenset())

2163

token_second = Token(re.compile(r"(\d+)S"),

2164

datetime.timedelta(seconds=1),

2165

frozenset((token_end,)))

2166

token_minute = Token(re.compile(r"(\d+)M"),

2167

datetime.timedelta(minutes=1),

2168

frozenset((token_second, token_end)))

2169

token_hour = Token(re.compile(r"(\d+)H"),

2170

datetime.timedelta(hours=1),

2171

frozenset((token_minute, token_end)))

2172

token_time = Token(re.compile(r"T"),

2173

None,

2174

frozenset((token_hour, token_minute,

2175

token_second)))

2176

token_day = Token(re.compile(r"(\d+)D"),

2177

datetime.timedelta(days=1),

2178

frozenset((token_time, token_end)))

2179

token_month = Token(re.compile(r"(\d+)M"),

2180

datetime.timedelta(weeks=4),

2181

frozenset((token_day, token_end)))

2182

token_year = Token(re.compile(r"(\d+)Y"),

2183

datetime.timedelta(weeks=52),

2184

frozenset((token_month, token_end)))

2185

token_week = Token(re.compile(r"(\d+)W"),

2186

datetime.timedelta(weeks=1),

2187

frozenset((token_end,)))

2188

token_duration = Token(re.compile(r"P"), None,

2189

frozenset((token_year, token_month,

2190

token_day, token_time,

2191

token_week))),

2192

# Define starting values

2193

value = datetime.timedelta() # Value so far

2194

found_token = None

2195

followers = frozenset(token_duration,) # Following valid tokens

2196

s = duration # String left to parse

2197

# Loop until end token is found

2198

while found_token is not token_end:

2199

# Search for any currently valid tokens

2200

for token in followers:

2201

match = token.regexp.match(s)

2202

if match is not None:

2203

# Token found

2204

if token.value is not None:

2205

# Value found, parse digits

2206

factor = int(match.group(1), 10)

2207

# Add to value so far

2208

value += factor * token.value

2209

# Strip token from string

2210

s = token.regexp.sub("", s, 1)

2211

# Go to found token

2212

found_token = token

2213

# Set valid next tokens

2214

followers = found_token.followers

2215

break

2216

else:

2217

# No currently valid tokens were found

2218

raise ValueError("Invalid RFC 3339 duration")

2219

# End token found

2220

return value

2221

2222

2223

1920

def string_to_delta(interval):

2224

1921

"""Parse a string and return a datetime.timedelta

2225

1922

2236

1933

>>> string_to_delta('5m 30s')

2237

1934

datetime.timedelta(0, 330)

2238

1935

"""

2239

2240

try:

2241

return rfc3339_duration_to_delta(interval)

2242

except ValueError:

2243

pass

2244

2245

1936

timevalue = datetime.timedelta(0)

2246

1937

for s in interval.split():

2247

1938

try:

2258

1949

elif suffix == "w":

2259

1950

delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)

2260

1951

else:

2261

raise ValueError("Unknown suffix {0!r}"

2262

.format(suffix))

2263

except IndexError as e:

1952

raise ValueError("Unknown suffix %r" % suffix)

1953

except (ValueError, IndexError) as e:

2264

1954

raise ValueError(*(e.args))

2265

1955

timevalue += delta

2266

1956

return timevalue

2279

1969

sys.exit()

2280

1970

if not noclose:

2281

1971

# Close all standard open file descriptors

2282

null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)

1972

null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)

2283

1973

if not stat.S_ISCHR(os.fstat(null).st_mode):

2284

1974

raise OSError(errno.ENODEV,

2285

"{0} not a character device"

2286

.format(os.devnull))

1975

"%s not a character device"

1976

% os.path.devnull)

2287

1977

os.dup2(null, sys.stdin.fileno())

2288

1978

os.dup2(null, sys.stdout.fileno())

2289

1979

os.dup2(null, sys.stderr.fileno())

2298

1988

2299

1989

parser = argparse.ArgumentParser()

2300

1990

parser.add_argument("-v", "--version", action="version",

2301

version = "%(prog)s {0}".format(version),

1991

version = "%%(prog)s %s" % version,

2302

1992

help="show version number and exit")

2303

1993

parser.add_argument("-i", "--interface", metavar="IF",

2304

1994

help="Bind to interface IF")

2310

2000

help="Run self-test")

2311

2001

parser.add_argument("--debug", action="store_true",

2312

2002

help="Debug mode; run in foreground and log"

2313

" to terminal", default=None)

2003

" to terminal")

2314

2004

parser.add_argument("--debuglevel", metavar="LEVEL",

2315

2005

help="Debug level for stdout output")

2316

2006

parser.add_argument("--priority", help="GnuTLS"

2323

2013

" files")

2324

2014

parser.add_argument("--no-dbus", action="store_false",

2325

2015

dest="use_dbus", help="Do not provide D-Bus"

2326

" system bus interface", default=None)

2016

" system bus interface")

2327

2017

parser.add_argument("--no-ipv6", action="store_false",

2328

dest="use_ipv6", help="Do not use IPv6",

2329

default=None)

2018

dest="use_ipv6", help="Do not use IPv6")

2330

2019

parser.add_argument("--no-restore", action="store_false",

2331

2020

dest="restore", help="Do not restore stored"

2332

" state", default=None)

2333

parser.add_argument("--socket", type=int,

2334

help="Specify a file descriptor to a network"

2335

" socket to use instead of creating one")

2021

" state")

2336

2022

parser.add_argument("--statedir", metavar="DIR",

2337

2023

help="Directory to save/restore state in")

2338

parser.add_argument("--foreground", action="store_true",

2339

help="Run in foreground", default=None)

2340

parser.add_argument("--no-zeroconf", action="store_false",

2341

dest="zeroconf", help="Do not use Zeroconf",

2342

default=None)

2343

2024

2344

2025

options = parser.parse_args()

2345

2026

2346

2027

if options.check:

2347

2028

import doctest

2348

fail_count, test_count = doctest.testmod()

2349

sys.exit(os.EX_OK if fail_count == 0 else 1)

2029

doctest.testmod()

2030

sys.exit()

2350

2031

2351

2032

# Default values for config file for server-global settings

2352

2033

server_defaults = { "interface": "",

2354

2035

"port": "",

2355

2036

"debug": "False",

2356

2037

"priority":

2357

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",

2038

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",

2358

2039

"servicename": "Mandos",

2359

2040

"use_dbus": "True",

2360

2041

"use_ipv6": "True",

2361

2042

"debuglevel": "",

2362

2043

"restore": "True",

2363

"socket": "",

2364

"statedir": "/var/lib/mandos",

2365

"foreground": "False",

2366

"zeroconf": "True",

2044

"statedir": "/var/lib/mandos"

2367

2045

}

2368

2046

2369

2047

# Parse config file for server-global settings

2374

2052

# Convert the SafeConfigParser object to a dict

2375

2053

server_settings = server_config.defaults()

2376

2054

# Use the appropriate methods on the non-string config options

2377

for option in ("debug", "use_dbus", "use_ipv6", "foreground"):

2055

for option in ("debug", "use_dbus", "use_ipv6"):

2378

2056

server_settings[option] = server_config.getboolean("DEFAULT",

2379

2057

option)

2380

2058

if server_settings["port"]:

2381

2059

server_settings["port"] = server_config.getint("DEFAULT",

2382

2060

"port")

2383

if server_settings["socket"]:

2384

server_settings["socket"] = server_config.getint("DEFAULT",

2385

"socket")

2386

# Later, stdin will, and stdout and stderr might, be dup'ed

2387

# over with an opened os.devnull. But we don't want this to

2388

# happen with a supplied network socket.

2389

if 0 <= server_settings["socket"] <= 2:

2390

server_settings["socket"] = os.dup(server_settings

2391

["socket"])

2392

2061

del server_config

2393

2062

2394

2063

# Override the settings from the config file with command line

2396

2065

for option in ("interface", "address", "port", "debug",

2397

2066

"priority", "servicename", "configdir",

2398

2067

"use_dbus", "use_ipv6", "debuglevel", "restore",

2399

"statedir", "socket", "foreground", "zeroconf"):

2068

"statedir"):

2400

2069

value = getattr(options, option)

2401

2070

if value is not None:

2402

2071

server_settings[option] = value

2405

2074

for option in server_settings.keys():

2406

2075

if type(server_settings[option]) is str:

2407

2076

server_settings[option] = unicode(server_settings[option])

2408

# Force all boolean options to be boolean

2409

for option in ("debug", "use_dbus", "use_ipv6", "restore",

2410

"foreground", "zeroconf"):

2411

server_settings[option] = bool(server_settings[option])

2412

# Debug implies foreground

2413

if server_settings["debug"]:

2414

server_settings["foreground"] = True

2415

2077

# Now we have our good server settings in "server_settings"

2416

2078

2417

2079

##################################################################

2418

2080

2419

if (not server_settings["zeroconf"] and

2420

not (server_settings["port"]

2421

or server_settings["socket"] != "")):

2422

parser.error("Needs port or socket to work without"

2423

" Zeroconf")

2424

2425

2081

# For convenience

2426

2082

debug = server_settings["debug"]

2427

2083

debuglevel = server_settings["debuglevel"]

2429

2085

use_ipv6 = server_settings["use_ipv6"]

2430

2086

stored_state_path = os.path.join(server_settings["statedir"],

2431

2087

stored_state_file)

2432

foreground = server_settings["foreground"]

2433

zeroconf = server_settings["zeroconf"]

2434

2088

2435

2089

if debug:

2436

2090

initlogger(debug, logging.DEBUG)

2443

2097

2444

2098

if server_settings["servicename"] != "Mandos":

2445

2099

syslogger.setFormatter(logging.Formatter

2446

('Mandos ({0}) [%(process)d]:'

2447

' %(levelname)s: %(message)s'

2448

.format(server_settings

2449

["servicename"])))

2100

('Mandos (%s) [%%(process)d]:'

2101

' %%(levelname)s: %%(message)s'

2102

% server_settings["servicename"]))

2450

2103

2451

2104

# Parse config file with clients

2452

2105

client_config = configparser.SafeConfigParser(Client

2457

2110

global mandos_dbus_service

2458

2111

mandos_dbus_service = None

2459

2112

2460

socketfd = None

2461

if server_settings["socket"] != "":

2462

socketfd = server_settings["socket"]

2463

2113

tcp_server = MandosServer((server_settings["address"],

2464

2114

server_settings["port"]),

2465

2115

ClientHandler,

2468

2118

use_ipv6=use_ipv6,

2469

2119

gnutls_priority=

2470

2120

server_settings["priority"],

2471

use_dbus=use_dbus,

2472

socketfd=socketfd)

2473

if not foreground:

2474

pidfilename = "/run/mandos.pid"

2475

if not os.path.isdir("/run/."):

2476

pidfilename = "/var/run/mandos.pid"

2477

pidfile = None

2121

use_dbus=use_dbus)

2122

if not debug:

2123

pidfilename = "/var/run/mandos.pid"

2478

2124

try:

2479

2125

pidfile = open(pidfilename, "w")

2480

except IOError as e:

2481

logger.error("Could not open file %r", pidfilename,

2482

exc_info=e)

2126

except IOError:

2127

logger.error("Could not open file %r", pidfilename)

2483

2128

2484

for name in ("_mandos", "mandos", "nobody"):

2129

try:

2130

uid = pwd.getpwnam("_mandos").pw_uid

2131

gid = pwd.getpwnam("_mandos").pw_gid

2132

except KeyError:

2485

2133

try:

2486

uid = pwd.getpwnam(name).pw_uid

2487

gid = pwd.getpwnam(name).pw_gid

2488

break

2134

uid = pwd.getpwnam("mandos").pw_uid

2135

gid = pwd.getpwnam("mandos").pw_gid

2489

2136

except KeyError:

2490

continue

2491

else:

2492

uid = 65534

2493

gid = 65534

2137

try:

2138

uid = pwd.getpwnam("nobody").pw_uid

2139

gid = pwd.getpwnam("nobody").pw_gid

2140

except KeyError:

2141

uid = 65534

2142

gid = 65534

2494

2143

try:

2495

2144

os.setgid(gid)

2496

2145

os.setuid(uid)

2497

2146

except OSError as error:

2498

if error.errno != errno.EPERM:

2499

raise

2147

if error[0] != errno.EPERM:

2148

raise error

2500

2149

2501

2150

if debug:

2502

2151

# Enable all possible GnuTLS debugging

2513

2162

.gnutls_global_set_log_function(debug_gnutls))

2514

2163

2515

2164

# Redirect stdin so all checkers get /dev/null

2516

null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)

2165

null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)

2517

2166

os.dup2(null, sys.stdin.fileno())

2518

2167

if null > 2:

2519

2168

os.close(null)

2520

2169

2521

2170

# Need to fork before connecting to D-Bus

2522

if not foreground:

2171

if not debug:

2523

2172

# Close all input and output, do double fork, etc.

2524

2173

daemon()

2525

2174

2526

# multiprocessing will use threads, so before we use gobject we

2527

# need to inform gobject that threads will be used.

2528

2175

gobject.threads_init()

2529

2176

2530

2177

global main_loop

2531

2178

# From the Avahi example code

2532

DBusGMainLoop(set_as_default=True)

2179

DBusGMainLoop(set_as_default=True )

2533

2180

main_loop = gobject.MainLoop()

2534

2181

bus = dbus.SystemBus()

2535

2182

# End of Avahi example code

2541

2188

("se.bsnet.fukt.Mandos", bus,

2542

2189

do_not_queue=True))

2543

2190

except dbus.exceptions.NameExistsException as e:

2544

logger.error("Disabling D-Bus:", exc_info=e)

2191

logger.error(unicode(e) + ", disabling D-Bus")

2545

2192

use_dbus = False

2546

2193

server_settings["use_dbus"] = False

2547

2194

tcp_server.use_dbus = False

2548

if zeroconf:

2549

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2550

service = AvahiServiceToSyslog(name =

2551

server_settings["servicename"],

2552

servicetype = "_mandos._tcp",

2553

protocol = protocol, bus = bus)

2554

if server_settings["interface"]:

2555

service.interface = (if_nametoindex

2556

(str(server_settings["interface"])))

2195

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2196

service = AvahiServiceToSyslog(name =

2197

server_settings["servicename"],

2198

servicetype = "_mandos._tcp",

2199

protocol = protocol, bus = bus)

2200

if server_settings["interface"]:

2201

service.interface = (if_nametoindex

2202

(str(server_settings["interface"])))

2557

2203

2558

2204

global multiprocessing_manager

2559

2205

multiprocessing_manager = multiprocessing.Manager()

2560

2206

2561

2207

client_class = Client

2562

2208

if use_dbus:

2563

client_class = functools.partial(ClientDBus, bus = bus)

2209

client_class = functools.partial(ClientDBusTransitional,

2210

bus = bus)

2564

2211

2565

2212

client_settings = Client.config_parser(client_config)

2566

2213

old_client_settings = {}

2567

2214

clients_data = {}

2568

2215

2569

# This is used to redirect stdout and stderr for checker processes

2570

global wnull

2571

wnull = open(os.devnull, "w") # A writable /dev/null

2572

# Only used if server is running in foreground but not in debug

2573

# mode

2574

if debug or not foreground:

2575

wnull.close()

2576

2577

2216

# Get client data and settings from last running state.

2578

2217

if server_settings["restore"]:

2579

2218

try:

2582

2221

(stored_state))

2583

2222

os.remove(stored_state_path)

2584

2223

except IOError as e:

2585

if e.errno == errno.ENOENT:

2586

logger.warning("Could not load persistent state: {0}"

2587

.format(os.strerror(e.errno)))

2588

else:

2589

logger.critical("Could not load persistent state:",

2590

exc_info=e)

2224

logger.warning("Could not load persistent state: {0}"

2225

.format(e))

2226

if e.errno != errno.ENOENT:

2591

2227

raise

2592

2228

except EOFError as e:

2593

2229

logger.warning("Could not load persistent state: "

2594

"EOFError:", exc_info=e)

2230

"EOFError: {0}".format(e))

2595

2231

2596

2232

with PGPEngine() as pgp:

2597

2233

for client_name, client in clients_data.iteritems():

2598

# Skip removed clients

2599

if client_name not in client_settings:

2600

continue

2601

2602

2234

# Decide which value to use after restoring saved state.

2603

2235

# We have three different values: Old config file,

2604

2236

# new config file, and saved state.

2618

2250

2619

2251

# Clients who has passed its expire date can still be

2620

2252

# enabled if its last checker was successful. Clients

2621

# whose checker succeeded before we stored its state is

2622

# assumed to have successfully run all checkers during

2623

# downtime.

2253

# whose checker failed before we stored its state is

2254

# assumed to have failed all checkers during downtime.

2624

2255

if client["enabled"]:

2625

2256

if datetime.datetime.utcnow() >= client["expires"]:

2626

2257

if not client["last_checked_ok"]:

2627

2258

logger.warning(

2628

2259

"disabling client {0} - Client never "

2629

"performed a successful checker"

2630

.format(client_name))

2260

"performed a successfull checker"

2261

.format(client["name"]))

2631

2262

client["enabled"] = False

2632

2263

elif client["last_checker_status"] != 0:

2633

2264

logger.warning(

2634

2265

"disabling client {0} - Client "

2635

2266

"last checker failed with error code {1}"

2636

.format(client_name,

2267

.format(client["name"],

2637

2268

client["last_checker_status"]))

2638

2269

client["enabled"] = False

2639

2270

else:

2642

2273

+ client["timeout"])

2643

2274

logger.debug("Last checker succeeded,"

2644

2275

" keeping {0} enabled"

2645

.format(client_name))

2276

.format(client["name"]))

2646

2277

try:

2647

2278

client["secret"] = (

2648

2279

pgp.decrypt(client["encrypted_secret"],

2654

2285

.format(client_name))

2655

2286

client["secret"] = (

2656

2287

client_settings[client_name]["secret"])

2288

2657

2289

2658

2290

# Add/remove clients based on new changes made to config

2659

2291

for client_name in (set(old_client_settings)

2662

2294

for client_name in (set(client_settings)

2663

2295

- set(old_client_settings)):

2664

2296

clients_data[client_name] = client_settings[client_name]

2665

2666

# Create all client objects

2297

2298

# Create clients all clients

2667

2299

for client_name, client in clients_data.iteritems():

2668

2300

tcp_server.clients[client_name] = client_class(

2669

name = client_name, settings = client,

2670

server_settings = server_settings)

2301

name = client_name, settings = client)

2671

2302

2672

2303

if not tcp_server.clients:

2673

2304

logger.warning("No clients defined")

2674

2675

if not foreground:

2676

if pidfile is not None:

2677

try:

2678

with pidfile:

2679

pid = os.getpid()

2680

pidfile.write(str(pid) + "\n".encode("utf-8"))

2681

except IOError:

2682

logger.error("Could not write to file %r with PID %d",

2683

pidfilename, pid)

2684

del pidfile

2305

2306

if not debug:

2307

try:

2308

with pidfile:

2309

pid = os.getpid()

2310

pidfile.write(str(pid) + "\n".encode("utf-8"))

2311

del pidfile

2312

except IOError:

2313

logger.error("Could not write to file %r with PID %d",

2314

pidfilename, pid)

2315

except NameError:

2316

# "pidfile" was never created

2317

pass

2685

2318

del pidfilename

2319

signal.signal(signal.SIGINT, signal.SIG_IGN)

2686

2320

2687

2321

signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())

2688

2322

signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())

2689

2323

2690

2324

if use_dbus:

2691

@alternate_dbus_interfaces({"se.recompile.Mandos":

2692

"se.bsnet.fukt.Mandos"})

2693

class MandosDBusService(DBusObjectWithProperties):

2325

class MandosDBusService(dbus.service.Object):

2694

2326

"""A D-Bus proxy object"""

2695

2327

def __init__(self):

2696

2328

dbus.service.Object.__init__(self, bus, "/")

2697

2329

_interface = "se.recompile.Mandos"

2698

2330

2699

@dbus_interface_annotations(_interface)

2700

def _foo(self):

2701

return { "org.freedesktop.DBus.Property"

2702

".EmitsChangedSignal":

2703

"false"}

2704

2705

2331

@dbus.service.signal(_interface, signature="o")

2706

2332

def ClientAdded(self, objpath):

2707

2333

"D-Bus signal"

2749

2375

2750

2376

del _interface

2751

2377

2752

mandos_dbus_service = MandosDBusService()

2378

class MandosDBusServiceTransitional(MandosDBusService):

2379

__metaclass__ = AlternateDBusNamesMetaclass

2380

mandos_dbus_service = MandosDBusServiceTransitional()

2753

2381

2754

2382

def cleanup():

2755

2383

"Cleanup function; run on exit"

2756

if zeroconf:

2757

service.cleanup()

2384

service.cleanup()

2758

2385

2759

2386

multiprocessing.active_children()

2760

wnull.close()

2761

2387

if not (tcp_server.clients or client_settings):

2762

2388

return

2763

2389

2775

2401

# A list of attributes that can not be pickled

2776

2402

# + secret.

2777

2403

exclude = set(("bus", "changedstate", "secret",

2778

"checker", "server_settings"))

2404

"checker"))

2779

2405

for name, typ in (inspect.getmembers

2780

2406

(dbus.service.Object)):

2781

2407

exclude.add(name)

2790

2416

del client_settings[client.name]["secret"]

2791

2417

2792

2418

try:

2793

with (tempfile.NamedTemporaryFile

2794

(mode='wb', suffix=".pickle", prefix='clients-',

2795

dir=os.path.dirname(stored_state_path),

2796

delete=False)) as stored_state:

2419

tempfd, tempname = tempfile.mkstemp(suffix=".pickle",

2420

prefix="clients-",

2421

dir=os.path.dirname

2422

(stored_state_path))

2423

with os.fdopen(tempfd, "wb") as stored_state:

2797

2424

pickle.dump((clients, client_settings), stored_state)

2798

tempname=stored_state.name

2799

2425

os.rename(tempname, stored_state_path)

2800

2426

except (IOError, OSError) as e:

2427

logger.warning("Could not save persistent state: {0}"

2428

.format(e))

2801

2429

if not debug:

2802

2430

try:

2803

2431

os.remove(tempname)

2804

2432

except NameError:

2805

2433

pass

2806

if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):

2807

logger.warning("Could not save persistent state: {0}"

2808

.format(os.strerror(e.errno)))

2809

else:

2810

logger.warning("Could not save persistent state:",

2811

exc_info=e)

2812

raise

2434

if e.errno not in set((errno.ENOENT, errno.EACCES,

2435

errno.EEXIST)):

2436

raise e

2813

2437

2814

2438

# Delete all clients, and settings from config

2815

2439

while tcp_server.clients:

2839

2463

tcp_server.server_activate()

2840

2464

2841

2465

# Find out what port we got

2842

if zeroconf:

2843

service.port = tcp_server.socket.getsockname()[1]

2466

service.port = tcp_server.socket.getsockname()[1]

2844

2467

if use_ipv6:

2845

2468

logger.info("Now listening on address %r, port %d,"

2846

" flowinfo %d, scope_id %d",

2847

*tcp_server.socket.getsockname())

2469

" flowinfo %d, scope_id %d"

2470

% tcp_server.socket.getsockname())

2848

2471

else: # IPv4

2849

logger.info("Now listening on address %r, port %d",

2850

*tcp_server.socket.getsockname())

2472

logger.info("Now listening on address %r, port %d"

2473

% tcp_server.socket.getsockname())

2851

2474

2852

2475

#service.interface = tcp_server.socket.getsockname()[3]

2853

2476

2854

2477

try:

2855

if zeroconf:

2856

# From the Avahi example code

2857

try:

2858

service.activate()

2859

except dbus.exceptions.DBusException as error:

2860

logger.critical("D-Bus Exception", exc_info=error)

2861

cleanup()

2862

sys.exit(1)

2863

# End of Avahi example code

2478

# From the Avahi example code

2479

try:

2480

service.activate()

2481

except dbus.exceptions.DBusException as error:

2482

logger.critical("DBusException: %s", error)

2483

cleanup()

2484

sys.exit(1)

2485

# End of Avahi example code

2864

2486

2865

2487

gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,

2866

2488

lambda *args, **kwargs:

2870

2492

logger.debug("Starting main loop")

2871

2493

main_loop.run()

2872

2494

except AvahiError as error:

2873

logger.critical("Avahi Error", exc_info=error)

2495

logger.critical("AvahiError: %s", error)

2874

2496

cleanup()

2875

2497

sys.exit(1)

2876

2498

except KeyboardInterrupt: