/mandos/trunk : revision 713

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

37

39

import SocketServer as socketserver

38

40

import socket

39

41

import argparse

65

67

import types

66

68

import binascii

67

69

import tempfile

70

import itertools

71

import collections

68

72

69

73

import dbus

70

74

import dbus.service

75

79

import ctypes.util

76

80

import xml.dom.minidom

77

81

import inspect

78

import GnuPGInterface

79

82

80

83

try:

81

84

SO_BINDTODEVICE = socket.SO_BINDTODEVICE

85

88

except ImportError:

86

89

SO_BINDTODEVICE = None

87

90

88

version = "1.4.1"

91

version = "1.6.6"

89

92

stored_state_file = "clients.pickle"

90

93

91

94

logger = logging.getLogger()

92

syslogger = (logging.handlers.SysLogHandler

93

(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

94

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

95

syslogger = None

95

96

97

try:

97

98

if_nametoindex = (ctypes.cdll.LoadLibrary

113

114

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

114

115

"""init logger and add loglevel"""

115

116

117

global syslogger

118

syslogger = (logging.handlers.SysLogHandler

119

(facility =

120

logging.handlers.SysLogHandler.LOG_DAEMON,

121

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

116

122

syslogger.setFormatter(logging.Formatter

117

123

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

118

124

' %(message)s'))

136

142

class PGPEngine(object):

137

143

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

138

144

def __init__(self):

139

self.gnupg = GnuPGInterface.GnuPG()

140

145

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

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

self.gnupgargs = ['--batch',

147

'--home', self.tempdir,

148

'--force-mdc',

149

'--quiet',

150

'--no-use-agent']

146

151

147

152

def __enter__(self):

148

153

return self

149

154

150

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

155

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

151

156

self._cleanup()

152

157

return False

153

158

170

175

def password_encode(self, password):

171

176

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

172

177

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

173

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

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

185

175

186

def encrypt(self, data, password):

176

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

177

with open(os.devnull) as devnull:

178

try:

179

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

180

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

181

attach_fhs={'stderr': devnull})

182

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

183

f.write(data)

184

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

185

ciphertext = f.read()

186

proc.wait()

187

except IOError as e:

188

raise PGPError(e)

189

self.gnupg.passphrase = None

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)

190

202

return ciphertext

191

203

192

204

def decrypt(self, data, password):

193

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

194

with open(os.devnull) as devnull:

195

try:

196

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

197

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

198

attach_fhs={'stderr': devnull})

199

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

200

f.write(data)

201

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

202

decrypted_plaintext = f.read()

203

proc.wait()

204

except IOError as e:

205

raise PGPError(e)

206

self.gnupg.passphrase = None

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)

207

221

return decrypted_plaintext

208

222

209

223

210

211

224

class AvahiError(Exception):

212

225

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

213

226

self.value = value

230

243

Used to optionally bind to the specified interface.

231

244

name: string; Example: 'Mandos'

232

245

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

233

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

246

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

234

247

port: integer; what port to announce

235

248

TXT: list of strings; TXT record for the service

236

249

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

242

255

server: D-Bus Server

243

256

bus: dbus.SystemBus()

244

257

"""

258

245

259

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

246

260

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

247

261

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

260

274

self.server = None

261

275

self.bus = bus

262

276

self.entry_group_state_changed_match = None

277

263

278

def rename(self):

264

279

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

265

280

if self.rename_count >= self.max_renames:

275

290

try:

276

291

self.add()

277

292

except dbus.exceptions.DBusException as error:

278

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

293

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

279

294

self.cleanup()

280

295

os._exit(1)

281

296

self.rename_count += 1

297

282

298

def remove(self):

283

299

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

284

300

if self.entry_group_state_changed_match is not None:

286

302

self.entry_group_state_changed_match = None

287

303

if self.group is not None:

288

304

self.group.Reset()

305

289

306

def add(self):

290

307

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

291

308

self.remove()

308

325

dbus.UInt16(self.port),

309

326

avahi.string_array_to_txt_array(self.TXT))

310

327

self.group.Commit()

328

311

329

def entry_group_state_changed(self, state, error):

312

330

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

313

331

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

320

338

elif state == avahi.ENTRY_GROUP_FAILURE:

321

339

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

322

340

unicode(error))

323

raise AvahiGroupError("State changed: %s"

324

% unicode(error))

341

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

342

.format(error))

343

325

344

def cleanup(self):

326

345

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

327

346

if self.group is not None:

332

351

pass

333

352

self.group = None

334

353

self.remove()

354

335

355

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

336

356

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

337

357

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

356

376

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

357

377

else:

358

378

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

379

359

380

def activate(self):

360

381

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

361

382

if self.server is None:

368

389

self.server_state_changed)

369

390

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

370

391

392

371

393

class AvahiServiceToSyslog(AvahiService):

372

394

def rename(self):

373

395

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

374

396

ret = AvahiService.rename(self)

375

397

syslogger.setFormatter(logging.Formatter

376

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

377

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

378

% self.name))

398

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

399

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

400

.format(self.name)))

379

401

return ret

380

402

403

381

404

def timedelta_to_milliseconds(td):

382

405

"Convert a datetime.timedelta() to milliseconds"

383

406

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

384

407

+ (td.seconds * 1000)

385

408

+ (td.microseconds // 1000))

386

409

410

387

411

class Client(object):

388

412

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

389

413

414

438

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

415

439

last_checker_status: integer between 0 and 255 reflecting exit

416

440

status of last checker. -1 reflects crashed

417

checker, or None.

441

checker, -2 means no checker completed yet.

418

442

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

419

443

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

420

444

D-Bus identifiers

421

445

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

422

446

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

423

447

until this client is disabled

424

extended_timeout: extra long timeout when password has been sent

448

extended_timeout: extra long timeout when secret has been sent

425

449

runtime_expansions: Allowed attributes for runtime expansion.

426

450

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

427

451

disabled, or None

452

server_settings: The server_settings dict from main()

428

453

"""

429

454

430

455

runtime_expansions = ("approval_delay", "approval_duration",

431

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

432

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

456

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

457

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

458

"last_approval_request", "last_checked_ok",

433

459

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

434

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

435

"extended_timeout": "15m",

436

"interval": "2m",

460

client_defaults = { "timeout": "PT5M",

461

"extended_timeout": "PT15M",

462

"interval": "PT2M",

437

463

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

438

464

"host": "",

439

"approval_delay": "0s",

440

"approval_duration": "1s",

465

"approval_delay": "PT0S",

466

"approval_duration": "PT1S",

441

467

"approved_by_default": "True",

442

468

"enabled": "True",

443

469

}

456

482

457

483

def approval_delay_milliseconds(self):

458

484

return timedelta_to_milliseconds(self.approval_delay)

459

485

460

486

@staticmethod

461

487

def config_parser(config):

462

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

488

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

463

489

{ client_name: {setting_name: value, ...}, ...}

464

with exceptions for any special settings as defined above"""

490

with exceptions for any special settings as defined above.

491

NOTE: Must be a pure function. Must return the same result

492

value given the same arguments.

493

"""

465

494

settings = {}

466

495

for client_name in config.sections():

467

496

section = dict(config.items(client_name))

471

500

# Reformat values from string types to Python types

472

501

client["approved_by_default"] = config.getboolean(

473

502

client_name, "approved_by_default")

474

client["enabled"] = config.getboolean(client_name, "enabled")

503

client["enabled"] = config.getboolean(client_name,

504

"enabled")

475

505

476

506

client["fingerprint"] = (section["fingerprint"].upper()

477

507

.replace(" ", ""))

483

513

"rb") as secfile:

484

514

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

485

515

else:

486

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

487

% section)

516

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

517

.format(section))

488

518

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

489

519

client["extended_timeout"] = string_to_delta(

490

520

section["extended_timeout"])

496

526

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

497

527

client["last_approval_request"] = None

498

528

client["last_checked_ok"] = None

499

client["last_checker_status"] = None

500

if client["enabled"]:

501

client["last_enabled"] = datetime.datetime.utcnow()

502

client["expires"] = (datetime.datetime.utcnow()

503

+ client["timeout"])

504

else:

505

client["last_enabled"] = None

506

client["expires"] = None

507

529

client["last_checker_status"] = -2

530

508

531

return settings

509

510

511

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

512

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

513

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

514

attribute."""

532

533

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

515

534

self.name = name

535

if server_settings is None:

536

server_settings = {}

537

self.server_settings = server_settings

516

538

# adding all client settings

517

539

for setting, value in settings.iteritems():

518

540

setattr(self, setting, value)

519

541

542

if self.enabled:

543

if not hasattr(self, "last_enabled"):

544

self.last_enabled = datetime.datetime.utcnow()

545

if not hasattr(self, "expires"):

546

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

547

+ self.timeout)

548

else:

549

self.last_enabled = None

550

self.expires = None

551

520

552

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

521

553

# Uppercase and remove spaces from fingerprint for later

522

554

# comparison purposes with return value from the fingerprint()

523

555

# function

524

556

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

525

self.created = settings.get("created", datetime.datetime.utcnow())

526

557

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

558

datetime.datetime.utcnow())

559

527

560

# attributes specific for this server instance

528

561

self.checker = None

529

562

self.checker_initiator_tag = None

557

590

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

558

591

# Already enabled

559

592

return

560

self.send_changedstate()

561

593

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

562

594

self.enabled = True

563

595

self.last_enabled = datetime.datetime.utcnow()

564

596

self.init_checker()

597

self.send_changedstate()

565

598

566

599

def disable(self, quiet=True):

567

600

"""Disable this client."""

568

601

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

569

602

return False

570

603

if not quiet:

571

self.send_changedstate()

572

if not quiet:

573

604

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

574

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

605

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

575

606

gobject.source_remove(self.disable_initiator_tag)

576

607

self.disable_initiator_tag = None

577

608

self.expires = None

578

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

609

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

579

610

gobject.source_remove(self.checker_initiator_tag)

580

611

self.checker_initiator_tag = None

581

612

self.stop_checker()

582

613

self.enabled = False

614

if not quiet:

615

self.send_changedstate()

583

616

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

584

617

return False

585

618

589

622

def init_checker(self):

590

623

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

591

624

# and every interval from then on.

625

if self.checker_initiator_tag is not None:

626

gobject.source_remove(self.checker_initiator_tag)

592

627

self.checker_initiator_tag = (gobject.timeout_add

593

628

(self.interval_milliseconds(),

594

629

self.start_checker))

595

630

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

631

if self.disable_initiator_tag is not None:

632

gobject.source_remove(self.disable_initiator_tag)

596

633

self.disable_initiator_tag = (gobject.timeout_add

597

634

(self.timeout_milliseconds(),

598

635

self.disable))

617

654

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

618

655

vars(self))

619

656

620

def checked_ok(self, timeout=None):

621

"""Bump up the timeout for this client.

622

623

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

624

alive and well.

625

"""

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."""

626

665

if timeout is None:

627

666

timeout = self.timeout

628

self.last_checked_ok = datetime.datetime.utcnow()

629

667

if self.disable_initiator_tag is not None:

630

668

gobject.source_remove(self.disable_initiator_tag)

669

self.disable_initiator_tag = None

631

670

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

632

671

self.disable_initiator_tag = (gobject.timeout_add

633

672

(timedelta_to_milliseconds

643

682

If a checker already exists, leave it running and do

644

683

nothing."""

645

684

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

646

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

647

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

648

# client would inevitably timeout, since no checker would get

649

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

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

650

689

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

651

690

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

652

691

# should be.

654

693

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

655

694

try:

656

695

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

657

except (AttributeError, OSError) as error:

658

if (isinstance(error, OSError)

659

and error.errno != errno.ECHILD):

660

raise error

696

except AttributeError:

697

pass

698

except OSError as error:

699

if error.errno != errno.ECHILD:

700

raise

661

701

else:

662

702

if pid:

663

703

logger.warning("Checker was a zombie")

666

706

self.current_checker_command)

667

707

# Start a new checker if needed

668

708

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)

669

714

try:

670

# In case checker_command has exactly one % operator

671

command = self.checker_command % self.host

672

except TypeError:

673

# Escape attributes for the shell

674

escaped_attrs = dict(

675

(attr,

676

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

677

errors=

678

'replace')))

679

for attr in

680

self.runtime_expansions)

681

682

try:

683

command = self.checker_command % escaped_attrs

684

except TypeError as error:

685

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

686

' %s', self.checker_command, error)

687

return True # Try again later

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

688

720

self.current_checker_command = command

689

721

try:

690

722

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

693

725

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

694

726

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

695

727

# 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 })

696

736

self.checker = subprocess.Popen(command,

697

737

close_fds=True,

698

shell=True, cwd="/")

699

self.checker_callback_tag = (gobject.child_watch_add

700

(self.checker.pid,

701

self.checker_callback,

702

data=command))

703

# The checker may have completed before the gobject

704

# watch was added. Check for this.

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:

705

751

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

706

if pid:

707

gobject.source_remove(self.checker_callback_tag)

708

self.checker_callback(pid, status, command)

709

752

except OSError as error:

710

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

711

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)

712

762

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

713

763

return True

714

764

721

771

return

722

772

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

723

773

try:

724

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

774

self.checker.terminate()

725

775

#time.sleep(0.5)

726

776

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

727

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

777

# self.checker.kill()

728

778

except OSError as error:

729

779

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

730

780

raise

747

797

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

748

798

if byte_arrays and signature != "ay":

749

799

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

750

" signature %r" % signature)

800

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

751

801

def decorator(func):

752

802

func._dbus_is_property = True

753

803

func._dbus_interface = dbus_interface

761

811

return decorator

762

812

763

813

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

764

851

class DBusPropertyException(dbus.exceptions.DBusException):

765

852

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

766

853

"""

789

876

"""

790

877

791

878

@staticmethod

792

def _is_dbus_property(obj):

793

return getattr(obj, "_dbus_is_property", False)

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)

794

887

795

def _get_all_dbus_properties(self):

888

def _get_all_dbus_things(self, thing):

796

889

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

797

890

"""

798

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

891

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

892

name),

893

athing.__get__(self))

799

894

for cls in self.__class__.__mro__

800

for name, prop in

801

inspect.getmembers(cls, self._is_dbus_property))

895

for name, athing in

896

inspect.getmembers(cls,

897

self._is_dbus_thing(thing)))

802

898

803

899

def _get_dbus_property(self, interface_name, property_name):

804

900

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

806

902

"""

807

903

for cls in self.__class__.__mro__:

808

904

for name, value in (inspect.getmembers

809

(cls, self._is_dbus_property)):

905

(cls,

906

self._is_dbus_thing("property"))):

810

907

if (value._dbus_name == property_name

811

908

and value._dbus_interface == interface_name):

812

909

return value.__get__(self)

840

937

# The byte_arrays option is not supported yet on

841

938

# signatures other than "ay".

842

939

if prop._dbus_signature != "ay":

843

raise ValueError

844

value = dbus.ByteArray(''.join(unichr(byte)

845

for byte in value))

940

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

941

"'ay' signature {0!r}"

942

.format(prop._dbus_signature))

943

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

944

for byte in value))

846

945

prop(value)

847

946

848

947

@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",

854

953

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

855

954

"""

856

955

properties = {}

857

for name, prop in self._get_all_dbus_properties():

956

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

858

957

if (interface_name

859

958

and interface_name != prop._dbus_interface):

860

959

# Interface non-empty but did not match

875

974

path_keyword='object_path',

876

975

connection_keyword='connection')

877

976

def Introspect(self, object_path, connection):

878

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

977

"""Overloading of standard D-Bus method.

978

979

Inserts property tags and interface annotation tags.

879

980

"""

880

981

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

881

982

connection)

888

989

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

889

990

return e

890

991

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

992

# Add property tags

891

993

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

892

994

for name, prop

893

in self._get_all_dbus_properties()

995

in self._get_all_dbus_things("property")

894

996

if prop._dbus_interface

895

997

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

896

998

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)

897

1030

# Add the names to the return values for the

898

1031

# "org.freedesktop.DBus.Properties" methods

899

1032

if (if_tag.getAttribute("name")

914

1047

except (AttributeError, xml.dom.DOMException,

915

1048

xml.parsers.expat.ExpatError) as error:

916

1049

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

917

error)

1050

exc_info=error)

918

1051

return xmlstring

919

1052

920

1053

921

def datetime_to_dbus (dt, variant_level=0):

1054

def datetime_to_dbus(dt, variant_level=0):

922

1055

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

923

1056

if dt is None:

924

1057

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

926

1059

variant_level=variant_level)

927

1060

928

1061

929

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

930

.__metaclass__):

931

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

932

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

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).

933

1084

"""

934

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

935

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

936

# methods, signals, or properties in them

937

for base in (b for b in bases

938

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

939

# Go though all attributes of the base class

940

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

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):

941

1092

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

942

1093

# with the wrong interface name

943

1094

if (not hasattr(attribute, "_dbus_interface")

944

1095

or not attribute._dbus_interface

945

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

1096

.startswith(orig_interface_name)):

946

1097

continue

947

1098

# Create an alternate D-Bus interface name based on

948

1099

# the current name

949

1100

alt_interface = (attribute._dbus_interface

950

.replace("se.recompile.Mandos",

951

"se.bsnet.fukt.Mandos"))

1101

.replace(orig_interface_name,

1102

alt_interface_name))

1103

interface_names.add(alt_interface)

952

1104

# Is this a D-Bus signal?

953

1105

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

954

# Extract the original non-method function by

955

# black magic

1106

# Extract the original non-method undecorated

1107

# function by black magic

956

1108

nonmethod_func = (dict(

957

1109

zip(attribute.func_code.co_freevars,

958

1110

attribute.__closure__))["func"]

969

1121

nonmethod_func.func_name,

970

1122

nonmethod_func.func_defaults,

971

1123

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

972

1130

# Define a creator of a function to call both the

973

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

974

# signals gets sent when the function is called

1131

# original and alternate functions, so both the

1132

# original and alternate signals gets sent when

1133

# the function is called

975

1134

def fixscope(func1, func2):

976

1135

"""This function is a scope container to pass

977

1136

func1 and func2 to the "call_both" function

984

1143

return call_both

985

1144

# Create the "call_both" function and add it to

986

1145

# the class

987

attr[attrname] = fixscope(attribute,

988

new_function)

1146

attr[attrname] = fixscope(attribute, new_function)

989

1147

# Is this a D-Bus method?

990

1148

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

991

1149

# Create a new, but exactly alike, function

1002

1160

attribute.func_name,

1003

1161

attribute.func_defaults,

1004

1162

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

1005

1169

# Is this a D-Bus property?

1006

1170

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

1007

1171

# Create a new, but exactly alike, function

1021

1185

attribute.func_name,

1022

1186

attribute.func_defaults,

1023

1187

attribute.func_closure)))

1024

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

1025

1026

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"})

1027

1233

class ClientDBus(Client, DBusObjectWithProperties):

1028

1234

"""A Client class using D-Bus

1029

1235

1040

1246

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

1041

1247

self.bus = bus

1042

1248

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

1043

self._approvals_pending = 0

1044

1045

self._approvals_pending = 0

1046

1249

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

1047

1250

# the D-Bus

1048

1251

client_object_name = unicode(self.name).translate(

1052

1255

("/clients/" + client_object_name))

1053

1256

DBusObjectWithProperties.__init__(self, self.bus,

1054

1257

self.dbus_object_path)

1055

1258

1056

1259

def notifychangeproperty(transform_func,

1057

1260

dbus_name, type_func=lambda x: x,

1058

1261

variant_level=1):

1081

1284

1082

1285

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

1083

1286

1084

1085

1287

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1086

1288

approvals_pending = notifychangeproperty(dbus.Boolean,

1087

1289

"ApprovalPending",

1094

1296

checker is not None)

1095

1297

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1096

1298

"LastCheckedOK")

1299

last_checker_status = notifychangeproperty(dbus.Int16,

1300

"LastCheckerStatus")

1097

1301

last_approval_request = notifychangeproperty(

1098

1302

datetime_to_dbus, "LastApprovalRequest")

1099

1303

approved_by_default = notifychangeproperty(dbus.Boolean,

1149

1353

*args, **kwargs)

1150

1354

1151

1355

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

1152

old_checker = self.checker

1153

if self.checker is not None:

1154

old_checker_pid = self.checker.pid

1155

else:

1156

old_checker_pid = None

1356

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

1157

1357

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

1158

1358

# Only if new checker process was started

1159

1359

if (self.checker is not None

1167

1367

return False

1168

1368

1169

1369

def approve(self, value=True):

1170

self.send_changedstate()

1171

1370

self.approved = value

1172

1371

gobject.timeout_add(timedelta_to_milliseconds

1173

1372

(self.approval_duration),

1174

1373

self._reset_approved)

1175

1374

self.send_changedstate()

1176

1375

1177

1376

## D-Bus methods, signals & properties

1178

1377

_interface = "se.recompile.Mandos.Client"

1179

1378

1379

## Interfaces

1380

1381

@dbus_interface_annotations(_interface)

1382

def _foo(self):

1383

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

1384

"false"}

1385

1180

1386

## Signals

1181

1387

1182

1388

# CheckerCompleted - signal

1218

1424

"D-Bus signal"

1219

1425

return self.need_approval()

1220

1426

1221

# NeRwequest - signal

1222

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

1223

def NewRequest(self, ip):

1224

"""D-Bus signal

1225

Is sent after a client request a password.

1226

"""

1227

pass

1228

1229

1427

## Methods

1230

1428

1231

1429

# Approve - method

1341

1539

return

1342

1540

return datetime_to_dbus(self.last_checked_ok)

1343

1541

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

1344

1548

# Expires - property

1345

1549

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

1346

1550

def Expires_dbus_property(self):

1357

1561

def Timeout_dbus_property(self, value=None):

1358

1562

if value is None: # get

1359

1563

return dbus.UInt64(self.timeout_milliseconds())

1564

old_timeout = self.timeout

1360

1565

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

1361

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

1362

return

1363

# Reschedule timeout

1364

gobject.source_remove(self.disable_initiator_tag)

1365

self.disable_initiator_tag = None

1366

self.expires = None

1367

time_to_die = timedelta_to_milliseconds((self

1368

.last_checked_ok

1369

+ self.timeout)

1370

- datetime.datetime

1371

.utcnow())

1372

if time_to_die <= 0:

1373

# The timeout has passed

1374

self.disable()

1375

else:

1376

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

1377

+ datetime.timedelta(milliseconds =

1378

time_to_die))

1379

self.disable_initiator_tag = (gobject.timeout_add

1380

(time_to_die, self.disable))

1566

# Reschedule disabling

1567

if self.enabled:

1568

now = datetime.datetime.utcnow()

1569

self.expires += self.timeout - old_timeout

1570

if self.expires <= now:

1571

# The timeout has passed

1572

self.disable()

1573

else:

1574

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

1575

is None):

1576

return

1577

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))

1381

1582

1382

1583

# ExtendedTimeout - property

1383

1584

@dbus_service_property(_interface, signature="t",

1462

1663

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

1463

1664

1464

1665

1465

class ClientDBusTransitional(ClientDBus):

1466

__metaclass__ = AlternateDBusNamesMetaclass

1467

1468

1469

1666

class ClientHandler(socketserver.BaseRequestHandler, object):

1470

1667

"""A class to handle client connections.

1471

1668

1507

1704

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

1508

1705

try:

1509

1706

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

1510

raise RuntimeError

1707

raise RuntimeError(line)

1511

1708

except (ValueError, IndexError, RuntimeError) as error:

1512

1709

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

1513

1710

return

1539

1736

except KeyError:

1540

1737

return

1541

1738

1542

if self.server.use_dbus:

1543

# Emit D-Bus signal

1544

client.NewRequest(str(self.client_address))

1545

1546

1739

if client.approval_delay:

1547

1740

delay = client.approval_delay

1548

1741

client.approvals_pending += 1

1579

1772

#wait until timeout or approved

1580

1773

time = datetime.datetime.now()

1581

1774

client.changedstate.acquire()

1582

(client.changedstate.wait

1583

(float(client.timedelta_to_milliseconds(delay)

1584

/ 1000)))

1775

client.changedstate.wait(

1776

float(timedelta_to_milliseconds(delay)

1777

/ 1000))

1585

1778

client.changedstate.release()

1586

1779

time2 = datetime.datetime.now()

1587

1780

if (time2 - time) >= delay:

1603

1796

try:

1604

1797

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

1605

1798

except gnutls.errors.GNUTLSError as error:

1606

logger.warning("gnutls send failed")

1799

logger.warning("gnutls send failed",

1800

exc_info=error)

1607

1801

return

1608

1802

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

1609

1803

sent, len(client.secret)

1612

1806

1613

1807

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

1614

1808

# bump the timeout using extended_timeout

1615

client.checked_ok(client.extended_timeout)

1809

client.bump_timeout(client.extended_timeout)

1616

1810

if self.server.use_dbus:

1617

1811

# Emit D-Bus signal

1618

1812

client.GotSecret()

1623

1817

try:

1624

1818

session.bye()

1625

1819

except gnutls.errors.GNUTLSError as error:

1626

logger.warning("GnuTLS bye failed")

1820

logger.warning("GnuTLS bye failed",

1821

exc_info=error)

1627

1822

1628

1823

@staticmethod

1629

1824

def peer_certificate(session):

1701

1896

def process_request(self, request, address):

1702

1897

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

1703

1898

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

1704

args = (request,

1705

address))

1899

args = (request, address))

1706

1900

proc.start()

1707

1901

return proc

1708

1902

1723

1917

1724

1918

def add_pipe(self, parent_pipe, proc):

1725

1919

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

1726

raise NotImplementedError

1920

raise NotImplementedError()

1727

1921

1728

1922

1729

1923

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1736

1930

use_ipv6: Boolean; to use IPv6 or not

1737

1931

"""

1738

1932

def __init__(self, server_address, RequestHandlerClass,

1739

interface=None, use_ipv6=True):

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

"""

1740

1937

self.interface = interface

1741

1938

if use_ipv6:

1742

1939

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.

1743

1966

socketserver.TCPServer.__init__(self, server_address,

1744

1967

RequestHandlerClass)

1968

1745

1969

def server_bind(self):

1746

1970

"""This overrides the normal server_bind() function

1747

1971

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

1755

1979

try:

1756

1980

self.socket.setsockopt(socket.SOL_SOCKET,

1757

1981

SO_BINDTODEVICE,

1758

str(self.interface

1759

+ '\0'))

1982

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

1760

1983

except socket.error as error:

1761

if error[0] == errno.EPERM:

1762

logger.error("No permission to"

1763

" bind to interface %s",

1764

self.interface)

1765

elif error[0] == errno.ENOPROTOOPT:

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:

1766

1988

logger.error("SO_BINDTODEVICE not available;"

1767

1989

" cannot bind to interface %s",

1768

1990

self.interface)

1991

elif error.errno == errno.ENODEV:

1992

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

1993

" cannot bind", self.interface)

1769

1994

else:

1770

1995

raise

1771

1996

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

1774

1999

if self.address_family == socket.AF_INET6:

1775

2000

any_address = "::" # in6addr_any

1776

2001

else:

1777

any_address = socket.INADDR_ANY

2002

any_address = "0.0.0.0" # INADDR_ANY

1778

2003

self.server_address = (any_address,

1779

2004

self.server_address[1])

1780

2005

elif not self.server_address[1]:

1801

2026

"""

1802

2027

def __init__(self, server_address, RequestHandlerClass,

1803

2028

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

1804

gnutls_priority=None, use_dbus=True):

2029

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

1805

2030

self.enabled = False

1806

2031

self.clients = clients

1807

2032

if self.clients is None:

1811

2036

IPv6_TCPServer.__init__(self, server_address,

1812

2037

RequestHandlerClass,

1813

2038

interface = interface,

1814

use_ipv6 = use_ipv6)

2039

use_ipv6 = use_ipv6,

2040

socketfd = socketfd)

1815

2041

def server_activate(self):

1816

2042

if self.enabled:

1817

2043

return socketserver.TCPServer.server_activate(self)

1830

2056

1831

2057

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

1832

2058

proc = None, client_object=None):

1833

condition_names = {

1834

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

1835

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

1836

# blocking).

1837

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

1838

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

1839

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

1840

# broken, usually for pipes and

1841

# sockets).

1842

}

1843

conditions_string = ' | '.join(name

1844

for cond, name in

1845

condition_names.iteritems()

1846

if cond & condition)

1847

2059

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

1848

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

2060

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

1849

2061

# Wait for other process to exit

1850

2062

proc.join()

1851

2063

return False

1909

2121

return True

1910

2122

1911

2123

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

1912

2223

def string_to_delta(interval):

1913

2224

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

1914

2225

1925

2236

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

1926

2237

datetime.timedelta(0, 330)

1927

2238

"""

2239

2240

try:

2241

return rfc3339_duration_to_delta(interval)

2242

except ValueError:

2243

pass

2244

1928

2245

timevalue = datetime.timedelta(0)

1929

2246

for s in interval.split():

1930

2247

try:

1941

2258

elif suffix == "w":

1942

2259

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

1943

2260

else:

1944

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

1945

except (ValueError, IndexError) as e:

2261

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

2262

.format(suffix))

2263

except IndexError as e:

1946

2264

raise ValueError(*(e.args))

1947

2265

timevalue += delta

1948

2266

return timevalue

1961

2279

sys.exit()

1962

2280

if not noclose:

1963

2281

# Close all standard open file descriptors

1964

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

2282

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

1965

2283

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

1966

2284

raise OSError(errno.ENODEV,

1967

"%s not a character device"

1968

% os.path.devnull)

2285

"{0} not a character device"

2286

.format(os.devnull))

1969

2287

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

1970

2288

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

1971

2289

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

1980

2298

1981

2299

parser = argparse.ArgumentParser()

1982

2300

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

1983

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

2301

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

1984

2302

help="show version number and exit")

1985

2303

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

1986

2304

help="Bind to interface IF")

1992

2310

help="Run self-test")

1993

2311

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

1994

2312

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

1995

" to terminal")

2313

" to terminal", default=None)

1996

2314

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

1997

2315

help="Debug level for stdout output")

1998

2316

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

2005

2323

" files")

2006

2324

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

2007

2325

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

2008

" system bus interface")

2326

" system bus interface", default=None)

2009

2327

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

2010

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

2328

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

2329

default=None)

2011

2330

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

2012

2331

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

2013

" state")

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")

2014

2336

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

2015

2337

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)

2016

2343

2017

2344

options = parser.parse_args()

2018

2345

2019

2346

if options.check:

2020

2347

import doctest

2021

doctest.testmod()

2022

sys.exit()

2348

fail_count, test_count = doctest.testmod()

2349

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

2023

2350

2024

2351

# Default values for config file for server-global settings

2025

2352

server_defaults = { "interface": "",

2027

2354

"port": "",

2028

2355

"debug": "False",

2029

2356

"priority":

2030

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

2357

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

2031

2358

"servicename": "Mandos",

2032

2359

"use_dbus": "True",

2033

2360

"use_ipv6": "True",

2034

2361

"debuglevel": "",

2035

2362

"restore": "True",

2036

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

2363

"socket": "",

2364

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

2365

"foreground": "False",

2366

"zeroconf": "True",

2037

2367

}

2038

2368

2039

2369

# Parse config file for server-global settings

2044

2374

# Convert the SafeConfigParser object to a dict

2045

2375

server_settings = server_config.defaults()

2046

2376

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

2047

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

2377

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

2048

2378

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

2049

2379

option)

2050

2380

if server_settings["port"]:

2051

2381

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

2052

2382

"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"])

2053

2392

del server_config

2054

2393

2055

2394

# Override the settings from the config file with command line

2057

2396

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

2058

2397

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

2059

2398

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

2060

"statedir"):

2399

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

2061

2400

value = getattr(options, option)

2062

2401

if value is not None:

2063

2402

server_settings[option] = value

2066

2405

for option in server_settings.keys():

2067

2406

if type(server_settings[option]) is str:

2068

2407

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

2069

2415

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

2070

2416

2071

2417

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

2072

2418

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

2073

2425

# For convenience

2074

2426

debug = server_settings["debug"]

2075

2427

debuglevel = server_settings["debuglevel"]

2077

2429

use_ipv6 = server_settings["use_ipv6"]

2078

2430

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

2079

2431

stored_state_file)

2432

foreground = server_settings["foreground"]

2433

zeroconf = server_settings["zeroconf"]

2080

2434

2081

2435

if debug:

2082

2436

initlogger(debug, logging.DEBUG)

2089

2443

2090

2444

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

2091

2445

syslogger.setFormatter(logging.Formatter

2092

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

2093

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

2094

% server_settings["servicename"]))

2446

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

2447

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

2448

.format(server_settings

2449

["servicename"])))

2095

2450

2096

2451

# Parse config file with clients

2097

client_config = configparser.SafeConfigParser(Client.client_defaults)

2452

client_config = configparser.SafeConfigParser(Client

2453

.client_defaults)

2098

2454

client_config.read(os.path.join(server_settings["configdir"],

2099

2455

"clients.conf"))

2100

2456

2101

2457

global mandos_dbus_service

2102

2458

mandos_dbus_service = None

2103

2459

2460

socketfd = None

2461

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

2462

socketfd = server_settings["socket"]

2104

2463

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

2105

2464

server_settings["port"]),

2106

2465

ClientHandler,

2109

2468

use_ipv6=use_ipv6,

2110

2469

gnutls_priority=

2111

2470

server_settings["priority"],

2112

use_dbus=use_dbus)

2113

if not debug:

2114

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

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

2115

2478

try:

2116

2479

pidfile = open(pidfilename, "w")

2117

except IOError:

2118

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

2480

except IOError as e:

2481

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

2482

exc_info=e)

2119

2483

2120

try:

2121

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

2122

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

2123

except KeyError:

2484

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

2124

2485

try:

2125

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

2126

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

2486

uid = pwd.getpwnam(name).pw_uid

2487

gid = pwd.getpwnam(name).pw_gid

2488

break

2127

2489

except KeyError:

2128

try:

2129

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

2130

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

2131

except KeyError:

2132

uid = 65534

2133

gid = 65534

2490

continue

2491

else:

2492

uid = 65534

2493

gid = 65534

2134

2494

try:

2135

2495

os.setgid(gid)

2136

2496

os.setuid(uid)

2137

2497

except OSError as error:

2138

if error[0] != errno.EPERM:

2139

raise error

2498

if error.errno != errno.EPERM:

2499

raise

2140

2500

2141

2501

if debug:

2142

2502

# Enable all possible GnuTLS debugging

2153

2513

.gnutls_global_set_log_function(debug_gnutls))

2154

2514

2155

2515

# Redirect stdin so all checkers get /dev/null

2156

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

2516

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

2157

2517

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

2158

2518

if null > 2:

2159

2519

os.close(null)

2160

2520

2161

2521

# Need to fork before connecting to D-Bus

2162

if not debug:

2522

if not foreground:

2163

2523

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

2164

2524

daemon()

2165

2525

2526

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

2527

# need to inform gobject that threads will be used.

2166

2528

gobject.threads_init()

2167

2529

2168

2530

global main_loop

2169

2531

# From the Avahi example code

2170

DBusGMainLoop(set_as_default=True )

2532

DBusGMainLoop(set_as_default=True)

2171

2533

main_loop = gobject.MainLoop()

2172

2534

bus = dbus.SystemBus()

2173

2535

# End of Avahi example code

2179

2541

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

2180

2542

do_not_queue=True))

2181

2543

except dbus.exceptions.NameExistsException as e:

2182

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

2544

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

2183

2545

use_dbus = False

2184

2546

server_settings["use_dbus"] = False

2185

2547

tcp_server.use_dbus = False

2186

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2187

service = AvahiServiceToSyslog(name =

2188

server_settings["servicename"],

2189

servicetype = "_mandos._tcp",

2190

protocol = protocol, bus = bus)

2191

if server_settings["interface"]:

2192

service.interface = (if_nametoindex

2193

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

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"])))

2194

2557

2195

2558

global multiprocessing_manager

2196

2559

multiprocessing_manager = multiprocessing.Manager()

2197

2560

2198

2561

client_class = Client

2199

2562

if use_dbus:

2200

client_class = functools.partial(ClientDBusTransitional,

2201

bus = bus)

2563

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

2202

2564

2203

2565

client_settings = Client.config_parser(client_config)

2204

2566

old_client_settings = {}

2205

2567

clients_data = {}

2206

2568

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

2207

2577

# Get client data and settings from last running state.

2208

2578

if server_settings["restore"]:

2209

2579

try:

2212

2582

(stored_state))

2213

2583

os.remove(stored_state_path)

2214

2584

except IOError as e:

2215

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

2216

.format(e))

2217

if e.errno != errno.ENOENT:

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)

2218

2591

raise

2219

2592

except EOFError as e:

2220

2593

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

2221

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

2594

"EOFError:", exc_info=e)

2222

2595

2223

2596

with PGPEngine() as pgp:

2224

2597

for client_name, client in clients_data.iteritems():

2598

# Skip removed clients

2599

if client_name not in client_settings:

2600

continue

2601

2225

2602

# Decide which value to use after restoring saved state.

2226

2603

# We have three different values: Old config file,

2227

2604

# new config file, and saved state.

2241

2618

2242

2619

# Clients who has passed its expire date can still be

2243

2620

# enabled if its last checker was successful. Clients

2244

# whose checker failed before we stored its state is

2245

# assumed to have failed all checkers during downtime.

2621

# whose checker succeeded before we stored its state is

2622

# assumed to have successfully run all checkers during

2623

# downtime.

2246

2624

if client["enabled"]:

2247

2625

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

2248

2626

if not client["last_checked_ok"]:

2249

2627

logger.warning(

2250

2628

"disabling client {0} - Client never "

2251

"performed a successfull checker"

2252

.format(client["name"]))

2629

"performed a successful checker"

2630

.format(client_name))

2253

2631

client["enabled"] = False

2254

2632

elif client["last_checker_status"] != 0:

2255

2633

logger.warning(

2256

2634

"disabling client {0} - Client "

2257

2635

"last checker failed with error code {1}"

2258

.format(client["name"],

2636

.format(client_name,

2259

2637

client["last_checker_status"]))

2260

2638

client["enabled"] = False

2261

2639

else:

2262

2640

client["expires"] = (datetime.datetime

2263

2641

.utcnow()

2264

2642

+ client["timeout"])

2265

2643

logger.debug("Last checker succeeded,"

2644

" keeping {0} enabled"

2645

.format(client_name))

2266

2646

try:

2267

2647

client["secret"] = (

2268

2648

pgp.decrypt(client["encrypted_secret"],

2274

2654

.format(client_name))

2275

2655

client["secret"] = (

2276

2656

client_settings[client_name]["secret"])

2277

2278

2657

2279

2658

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

2280

for client_name in set(old_client_settings) - set(client_settings):

2659

for client_name in (set(old_client_settings)

2660

- set(client_settings)):

2281

2661

del clients_data[client_name]

2282

for client_name in set(client_settings) - set(old_client_settings):

2662

for client_name in (set(client_settings)

2663

- set(old_client_settings)):

2283

2664

clients_data[client_name] = client_settings[client_name]

2284

2285

# Create clients all clients

2665

2666

# Create all client objects

2286

2667

for client_name, client in clients_data.iteritems():

2287

2668

tcp_server.clients[client_name] = client_class(

2288

name = client_name, settings = client)

2669

name = client_name, settings = client,

2670

server_settings = server_settings)

2289

2671

2290

2672

if not tcp_server.clients:

2291

2673

logger.warning("No clients defined")

2292

2293

if not debug:

2294

try:

2295

with pidfile:

2296

pid = os.getpid()

2297

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

2298

del pidfile

2299

except IOError:

2300

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

2301

pidfilename, pid)

2302

except NameError:

2303

# "pidfile" was never created

2304

pass

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

2685

del pidfilename

2306

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

2307

2686

2308

2687

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

2309

2688

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

2310

2689

2311

2690

if use_dbus:

2312

class MandosDBusService(dbus.service.Object):

2691

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

2692

"se.bsnet.fukt.Mandos"})

2693

class MandosDBusService(DBusObjectWithProperties):

2313

2694

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

2314

2695

def __init__(self):

2315

2696

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

2316

2697

_interface = "se.recompile.Mandos"

2317

2698

2699

@dbus_interface_annotations(_interface)

2700

def _foo(self):

2701

return { "org.freedesktop.DBus.Property"

2702

".EmitsChangedSignal":

2703

"false"}

2704

2318

2705

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

2319

2706

def ClientAdded(self, objpath):

2320

2707

"D-Bus signal"

2362

2749

2363

2750

del _interface

2364

2751

2365

class MandosDBusServiceTransitional(MandosDBusService):

2366

__metaclass__ = AlternateDBusNamesMetaclass

2367

mandos_dbus_service = MandosDBusServiceTransitional()

2752

mandos_dbus_service = MandosDBusService()

2368

2753

2369

2754

def cleanup():

2370

2755

"Cleanup function; run on exit"

2371

service.cleanup()

2756

if zeroconf:

2757

service.cleanup()

2372

2758

2373

2759

multiprocessing.active_children()

2760

wnull.close()

2374

2761

if not (tcp_server.clients or client_settings):

2375

2762

return

2376

2763

2388

2775

# A list of attributes that can not be pickled

2389

2776

# + secret.

2390

2777

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

2391

"checker"))

2778

"checker", "server_settings"))

2392

2779

for name, typ in (inspect.getmembers

2393

2780

(dbus.service.Object)):

2394

2781

exclude.add(name)

2403

2790

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

2404

2791

2405

2792

try:

2406

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

2407

prefix="clients-",

2408

dir=os.path.dirname

2409

(stored_state_path))

2410

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

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:

2411

2797

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

2798

tempname=stored_state.name

2412

2799

os.rename(tempname, stored_state_path)

2413

2800

except (IOError, OSError) as e:

2414

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

2415

.format(e))

2416

2801

if not debug:

2417

2802

try:

2418

2803

os.remove(tempname)

2419

2804

except NameError:

2420

2805

pass

2421

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

2422

errno.EEXIST)):

2423

raise e

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

2424

2813

2425

2814

# Delete all clients, and settings from config

2426

2815

while tcp_server.clients:

2450

2839

tcp_server.server_activate()

2451

2840

2452

2841

# Find out what port we got

2453

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

2842

if zeroconf:

2843

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

2454

2844

if use_ipv6:

2455

2845

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

2456

" flowinfo %d, scope_id %d"

2457

% tcp_server.socket.getsockname())

2846

" flowinfo %d, scope_id %d",

2847

*tcp_server.socket.getsockname())

2458

2848

else: # IPv4

2459

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

2460

% tcp_server.socket.getsockname())

2849

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

2850

*tcp_server.socket.getsockname())

2461

2851

2462

2852

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

2463

2853

2464

2854

try:

2465

# From the Avahi example code

2466

try:

2467

service.activate()

2468

except dbus.exceptions.DBusException as error:

2469

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

2470

cleanup()

2471

sys.exit(1)

2472

# End of Avahi example code

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

2473

2864

2474

2865

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

2475

2866

lambda *args, **kwargs:

2479

2870

logger.debug("Starting main loop")

2480

2871

main_loop.run()

2481

2872

except AvahiError as error:

2482

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

2873

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

2483

2874

cleanup()

2484

2875

sys.exit(1)

2485

2876

except KeyboardInterrupt: