/mandos/trunk : revision 518.2.3

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

89

85

except ImportError:

90

86

SO_BINDTODEVICE = None

91

87

92

version = "1.6.0"

88

89

version = "1.4.1"

93

90

stored_state_file = "clients.pickle"

94

91

95

92

logger = logging.getLogger()

114

111

return interface_index

115

112

116

113

117

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

114

def initlogger(level=logging.WARNING):

118

115

"""init logger and add loglevel"""

119

116

120

117

syslogger.setFormatter(logging.Formatter

122

119

' %(message)s'))

123

120

logger.addHandler(syslogger)

124

121

125

if debug:

126

console = logging.StreamHandler()

127

console.setFormatter(logging.Formatter('%(asctime)s %(name)s'

128

' [%(process)d]:'

129

' %(levelname)s:'

130

' %(message)s'))

131

logger.addHandler(console)

122

console = logging.StreamHandler()

123

console.setFormatter(logging.Formatter('%(asctime)s %(name)s'

124

' [%(process)d]:'

125

' %(levelname)s:'

126

' %(message)s'))

127

logger.addHandler(console)

132

128

logger.setLevel(level)

133

129

134

130

135

class PGPError(Exception):

136

"""Exception if encryption/decryption fails"""

131

class CryptoError(Exception):

137

132

pass

138

133

139

134

140

class PGPEngine(object):

135

class Crypto(object):

141

136

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

142

137

def __init__(self):

143

138

self.gnupg = GnuPGInterface.GnuPG()

146

141

self.gnupg.options.meta_interactive = False

147

142

self.gnupg.options.homedir = self.tempdir

148

143

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

149

'--quiet',

150

'--no-use-agent'])

144

'--quiet'])

151

145

152

146

def __enter__(self):

153

147

return self

154

148

155

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

149

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

156

150

self._cleanup()

157

151

return False

158

152

179

173

180

174

def encrypt(self, data, password):

181

175

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

182

with open(os.devnull, "w") as devnull:

176

with open(os.devnull) as devnull:

183

177

try:

184

178

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

185

179

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

190

184

ciphertext = f.read()

191

185

proc.wait()

192

186

except IOError as e:

193

raise PGPError(e)

187

raise CryptoError(e)

194

188

self.gnupg.passphrase = None

195

189

return ciphertext

196

190

197

191

def decrypt(self, data, password):

198

192

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

199

with open(os.devnull, "w") as devnull:

193

with open(os.devnull) as devnull:

200

194

try:

201

195

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

202

196

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

203

197

attach_fhs={'stderr': devnull})

204

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

198

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

205

199

f.write(data)

206

200

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

207

201

decrypted_plaintext = f.read()

208

202

proc.wait()

209

203

except IOError as e:

210

raise PGPError(e)

204

raise CryptoError(e)

211

205

self.gnupg.passphrase = None

212

206

return decrypted_plaintext

213

207

214

208

209

215

210

class AvahiError(Exception):

216

211

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

217

212

self.value = value

246

241

server: D-Bus Server

247

242

bus: dbus.SystemBus()

248

243

"""

249

250

244

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

251

245

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

252

246

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

265

259

self.server = None

266

260

self.bus = bus

267

261

self.entry_group_state_changed_match = None

268

269

262

def rename(self):

270

263

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

271

264

if self.rename_count >= self.max_renames:

281

274

try:

282

275

self.add()

283

276

except dbus.exceptions.DBusException as error:

284

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

277

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

285

278

self.cleanup()

286

279

os._exit(1)

287

280

self.rename_count += 1

288

289

281

def remove(self):

290

282

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

291

283

if self.entry_group_state_changed_match is not None:

293

285

self.entry_group_state_changed_match = None

294

286

if self.group is not None:

295

287

self.group.Reset()

296

297

288

def add(self):

298

289

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

299

290

self.remove()

316

307

dbus.UInt16(self.port),

317

308

avahi.string_array_to_txt_array(self.TXT))

318

309

self.group.Commit()

319

320

310

def entry_group_state_changed(self, state, error):

321

311

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

322

312

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

329

319

elif state == avahi.ENTRY_GROUP_FAILURE:

330

320

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

331

321

unicode(error))

332

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

333

.format(error))

334

322

raise AvahiGroupError("State changed: %s"

323

% unicode(error))

335

324

def cleanup(self):

336

325

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

337

326

if self.group is not None:

342

331

pass

343

332

self.group = None

344

333

self.remove()

345

346

334

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

347

335

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

348

336

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

367

355

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

368

356

else:

369

357

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

370

371

358

def activate(self):

372

359

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

373

360

if self.server is None:

380

367

self.server_state_changed)

381

368

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

382

369

383

384

370

class AvahiServiceToSyslog(AvahiService):

385

371

def rename(self):

386

372

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

387

373

ret = AvahiService.rename(self)

388

374

syslogger.setFormatter(logging.Formatter

389

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

390

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

391

.format(self.name)))

375

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

376

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

377

% self.name))

392

378

return ret

393

379

394

395

def timedelta_to_milliseconds(td):

380

def _timedelta_to_milliseconds(td):

396

381

"Convert a datetime.timedelta() to milliseconds"

397

382

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

398

383

+ (td.seconds * 1000)

399

384

+ (td.microseconds // 1000))

400

401

385

402

386

class Client(object):

403

387

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

404

388

405

389

Attributes:

406

approved: bool(); 'None' if not yet approved/disapproved

390

_approved: bool(); 'None' if not yet approved/disapproved

407

391

approval_delay: datetime.timedelta(); Time to wait for approval

408

392

approval_duration: datetime.timedelta(); Duration of one approval

409

393

checker: subprocess.Popen(); a running checker process used

427

411

interval: datetime.timedelta(); How often to start a new checker

428

412

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

429

413

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

414

430

415

last_checker_status: integer between 0 and 255 reflecting exit

431

416

status of last checker. -1 reflects crashed

432

checker, -2 means no checker completed yet.

417

checker, or None.

433

418

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

434

419

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

435

420

D-Bus identifiers

436

421

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

437

422

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

438

423

until this client is disabled

439

extended_timeout: extra long timeout when secret has been sent

424

extended_timeout: extra long timeout when password has been sent

440

425

runtime_expansions: Allowed attributes for runtime expansion.

441

426

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

442

427

disabled, or None

443

428

"""

444

429

445

430

runtime_expansions = ("approval_delay", "approval_duration",

446

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

447

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

448

"last_approval_request", "last_checked_ok",

431

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

432

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

449

433

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

450

client_defaults = { "timeout": "PT5M",

451

"extended_timeout": "PT15M",

452

"interval": "PT2M",

453

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

454

"host": "",

455

"approval_delay": "PT0S",

456

"approval_duration": "PT1S",

457

"approved_by_default": "True",

458

"enabled": "True",

459

}

460

434

461

435

def timeout_milliseconds(self):

462

436

"Return the 'timeout' attribute in milliseconds"

463

return timedelta_to_milliseconds(self.timeout)

437

return _timedelta_to_milliseconds(self.timeout)

464

438

465

439

def extended_timeout_milliseconds(self):

466

440

"Return the 'extended_timeout' attribute in milliseconds"

467

return timedelta_to_milliseconds(self.extended_timeout)

441

return _timedelta_to_milliseconds(self.extended_timeout)

468

442

469

443

def interval_milliseconds(self):

470

444

"Return the 'interval' attribute in milliseconds"

471

return timedelta_to_milliseconds(self.interval)

445

return _timedelta_to_milliseconds(self.interval)

472

446

473

447

def approval_delay_milliseconds(self):

474

return timedelta_to_milliseconds(self.approval_delay)

475

476

@staticmethod

477

def config_parser(config):

478

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

479

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

480

with exceptions for any special settings as defined above.

481

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

482

value given the same arguments.

483

"""

484

settings = {}

485

for client_name in config.sections():

486

section = dict(config.items(client_name))

487

client = settings[client_name] = {}

488

489

client["host"] = section["host"]

490

# Reformat values from string types to Python types

491

client["approved_by_default"] = config.getboolean(

492

client_name, "approved_by_default")

493

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

494

"enabled")

495

496

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

497

.replace(" ", ""))

498

if "secret" in section:

499

client["secret"] = section["secret"].decode("base64")

500

elif "secfile" in section:

501

with open(os.path.expanduser(os.path.expandvars

502

(section["secfile"])),

503

"rb") as secfile:

504

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

505

else:

506

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

507

.format(section))

508

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

509

client["extended_timeout"] = string_to_delta(

510

section["extended_timeout"])

511

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

512

client["approval_delay"] = string_to_delta(

513

section["approval_delay"])

514

client["approval_duration"] = string_to_delta(

515

section["approval_duration"])

516

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

517

client["last_approval_request"] = None

518

client["last_checked_ok"] = None

519

client["last_checker_status"] = -2

520

521

return settings

522

523

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

448

return _timedelta_to_milliseconds(self.approval_delay)

449

450

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

451

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

452

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

453

attribute."""

524

454

self.name = name

525

# adding all client settings

526

for setting, value in settings.iteritems():

527

setattr(self, setting, value)

528

529

if self.enabled:

530

if not hasattr(self, "last_enabled"):

531

self.last_enabled = datetime.datetime.utcnow()

532

if not hasattr(self, "expires"):

533

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

534

+ self.timeout)

535

else:

536

self.last_enabled = None

537

self.expires = None

538

455

if config is None:

456

config = {}

539

457

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

540

458

# Uppercase and remove spaces from fingerprint for later

541

459

# comparison purposes with return value from the fingerprint()

542

460

# function

461

self.fingerprint = (config["fingerprint"].upper()

462

.replace(" ", ""))

543

463

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

544

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

545

datetime.datetime.utcnow())

546

547

# attributes specific for this server instance

464

if "secret" in config:

465

self.secret = config["secret"].decode("base64")

466

elif "secfile" in config:

467

with open(os.path.expanduser(os.path.expandvars

468

(config["secfile"])),

469

"rb") as secfile:

470

self.secret = secfile.read()

471

else:

472

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

473

% self.name)

474

self.host = config.get("host", "")

475

self.created = datetime.datetime.utcnow()

476

self.enabled = config.get("enabled", True)

477

self.last_approval_request = None

478

if self.enabled:

479

self.last_enabled = datetime.datetime.utcnow()

480

else:

481

self.last_enabled = None

482

self.last_checked_ok = None

483

self.last_checker_status = None

484

self.timeout = string_to_delta(config["timeout"])

485

self.extended_timeout = string_to_delta(config

486

["extended_timeout"])

487

self.interval = string_to_delta(config["interval"])

548

488

self.checker = None

549

489

self.checker_initiator_tag = None

550

490

self.disable_initiator_tag = None

491

if self.enabled:

492

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

493

else:

494

self.expires = None

551

495

self.checker_callback_tag = None

496

self.checker_command = config["checker"]

552

497

self.current_checker_command = None

553

self.approved = None

498

self._approved = None

499

self.approved_by_default = config.get("approved_by_default",

500

True)

554

501

self.approvals_pending = 0

502

self.approval_delay = string_to_delta(

503

config["approval_delay"])

504

self.approval_duration = string_to_delta(

505

config["approval_duration"])

555

506

self.changedstate = (multiprocessing_manager

556

507

.Condition(multiprocessing_manager

557

508

.Lock()))

577

528

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

578

529

# Already enabled

579

530

return

531

self.send_changedstate()

580

532

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

581

533

self.enabled = True

582

534

self.last_enabled = datetime.datetime.utcnow()

583

535

self.init_checker()

584

self.send_changedstate()

585

536

586

537

def disable(self, quiet=True):

587

538

"""Disable this client."""

588

539

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

589

540

return False

590

541

if not quiet:

542

self.send_changedstate()

543

if not quiet:

591

544

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

592

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

545

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

593

546

gobject.source_remove(self.disable_initiator_tag)

594

547

self.disable_initiator_tag = None

595

548

self.expires = None

596

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

549

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

597

550

gobject.source_remove(self.checker_initiator_tag)

598

551

self.checker_initiator_tag = None

599

552

self.stop_checker()

600

553

self.enabled = False

601

if not quiet:

602

self.send_changedstate()

603

554

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

604

555

return False

605

556

609

560

def init_checker(self):

610

561

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

611

562

# and every interval from then on.

612

if self.checker_initiator_tag is not None:

613

gobject.source_remove(self.checker_initiator_tag)

614

563

self.checker_initiator_tag = (gobject.timeout_add

615

564

(self.interval_milliseconds(),

616

565

self.start_checker))

617

566

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

618

if self.disable_initiator_tag is not None:

619

gobject.source_remove(self.disable_initiator_tag)

620

567

self.disable_initiator_tag = (gobject.timeout_add

621

568

(self.timeout_milliseconds(),

622

569

self.disable))

628

575

self.checker_callback_tag = None

629

576

self.checker = None

630

577

if os.WIFEXITED(condition):

631

self.last_checker_status = os.WEXITSTATUS(condition)

578

self.last_checker_status = os.WEXITSTATUS(condition)

632

579

if self.last_checker_status == 0:

633

580

logger.info("Checker for %(name)s succeeded",

634

581

vars(self))

641

588

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

642

589

vars(self))

643

590

644

def checked_ok(self):

645

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

646

self.last_checked_ok = datetime.datetime.utcnow()

647

self.last_checker_status = 0

648

self.bump_timeout()

649

650

def bump_timeout(self, timeout=None):

651

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

591

def checked_ok(self, timeout=None):

592

"""Bump up the timeout for this client.

593

594

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

595

alive and well.

596

"""

652

597

if timeout is None:

653

598

timeout = self.timeout

599

self.last_checked_ok = datetime.datetime.utcnow()

654

600

if self.disable_initiator_tag is not None:

655

601

gobject.source_remove(self.disable_initiator_tag)

656

self.disable_initiator_tag = None

657

602

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

658

603

self.disable_initiator_tag = (gobject.timeout_add

659

(timedelta_to_milliseconds

604

(_timedelta_to_milliseconds

660

605

(timeout), self.disable))

661

606

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

662

607

669

614

If a checker already exists, leave it running and do

670

615

nothing."""

671

616

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

672

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

673

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

674

# would inevitably timeout, since no checker would get a

675

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

617

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

618

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

619

# client would inevitably timeout, since no checker would get

620

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

676

621

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

677

622

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

678

623

# should be.

692

637

self.current_checker_command)

693

638

# Start a new checker if needed

694

639

if self.checker is None:

695

# Escape attributes for the shell

696

escaped_attrs = dict(

697

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

698

for attr in

699

self.runtime_expansions)

700

640

try:

701

command = self.checker_command % escaped_attrs

702

except TypeError as error:

703

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

704

self.checker_command, exc_info=error)

705

return True # Try again later

641

# In case checker_command has exactly one % operator

642

command = self.checker_command % self.host

643

except TypeError:

644

# Escape attributes for the shell

645

escaped_attrs = dict(

646

(attr,

647

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

648

errors=

649

'replace')))

650

for attr in

651

self.runtime_expansions)

652

653

try:

654

command = self.checker_command % escaped_attrs

655

except TypeError as error:

656

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

657

' %s', self.checker_command, error)

658

return True # Try again later

706

659

self.current_checker_command = command

707

660

try:

708

661

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

714

667

self.checker = subprocess.Popen(command,

715

668

close_fds=True,

716

669

shell=True, cwd="/")

717

except OSError as error:

718

logger.error("Failed to start subprocess",

719

exc_info=error)

720

return True

721

self.checker_callback_tag = (gobject.child_watch_add

722

(self.checker.pid,

723

self.checker_callback,

724

data=command))

725

# The checker may have completed before the gobject

726

# watch was added. Check for this.

727

try:

670

self.checker_callback_tag = (gobject.child_watch_add

671

(self.checker.pid,

672

self.checker_callback,

673

data=command))

674

# The checker may have completed before the gobject

675

# watch was added. Check for this.

728

676

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

677

if pid:

678

gobject.source_remove(self.checker_callback_tag)

679

self.checker_callback(pid, status, command)

729

680

except OSError as error:

730

if error.errno == errno.ECHILD:

731

# This should never happen

732

logger.error("Child process vanished",

733

exc_info=error)

734

return True

735

raise

736

if pid:

737

gobject.source_remove(self.checker_callback_tag)

738

self.checker_callback(pid, status, command)

681

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

682

error)

739

683

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

740

684

return True

741

685

748

692

return

749

693

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

750

694

try:

751

self.checker.terminate()

695

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

752

696

#time.sleep(0.5)

753

697

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

754

# self.checker.kill()

698

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

755

699

except OSError as error:

756

700

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

757

701

raise

774

718

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

775

719

if byte_arrays and signature != "ay":

776

720

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

777

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

721

" signature %r" % signature)

778

722

def decorator(func):

779

723

func._dbus_is_property = True

780

724

func._dbus_interface = dbus_interface

788

732

return decorator

789

733

790

734

791

def dbus_interface_annotations(dbus_interface):

792

"""Decorator for marking functions returning interface annotations

793

794

Usage:

795

796

@dbus_interface_annotations("org.example.Interface")

797

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

798

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

799

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

800

"false"}

801

"""

802

def decorator(func):

803

func._dbus_is_interface = True

804

func._dbus_interface = dbus_interface

805

func._dbus_name = dbus_interface

806

return func

807

return decorator

808

809

810

def dbus_annotations(annotations):

811

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

812

Usage:

813

814

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

815

access="r")

816

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

817

"org.freedesktop.DBus.Property."

818

"EmitsChangedSignal": "false"})

819

def Property_dbus_property(self):

820

return dbus.Boolean(False)

821

"""

822

def decorator(func):

823

func._dbus_annotations = annotations

824

return func

825

return decorator

826

827

828

735

class DBusPropertyException(dbus.exceptions.DBusException):

829

736

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

830

737

"""

853

760

"""

854

761

855

762

@staticmethod

856

def _is_dbus_thing(thing):

857

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

858

859

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

860

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

861

"""

862

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

863

False)

763

def _is_dbus_property(obj):

764

return getattr(obj, "_dbus_is_property", False)

864

765

865

def _get_all_dbus_things(self, thing):

766

def _get_all_dbus_properties(self):

866

767

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

867

768

"""

868

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

869

name),

870

athing.__get__(self))

769

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

871

770

for cls in self.__class__.__mro__

872

for name, athing in

873

inspect.getmembers(cls,

874

self._is_dbus_thing(thing)))

771

for name, prop in

772

inspect.getmembers(cls, self._is_dbus_property))

875

773

876

774

def _get_dbus_property(self, interface_name, property_name):

877

775

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

879

777

"""

880

778

for cls in self.__class__.__mro__:

881

779

for name, value in (inspect.getmembers

882

(cls,

883

self._is_dbus_thing("property"))):

780

(cls, self._is_dbus_property)):

884

781

if (value._dbus_name == property_name

885

782

and value._dbus_interface == interface_name):

886

783

return value.__get__(self)

915

812

# signatures other than "ay".

916

813

if prop._dbus_signature != "ay":

917

814

raise ValueError

918

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

919

for byte in value))

815

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

816

for byte in value))

920

817

prop(value)

921

818

922

819

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

928

825

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

929

826

"""

930

827

properties = {}

931

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

828

for name, prop in self._get_all_dbus_properties():

932

829

if (interface_name

933

830

and interface_name != prop._dbus_interface):

934

831

# Interface non-empty but did not match

949

846

path_keyword='object_path',

950

847

connection_keyword='connection')

951

848

def Introspect(self, object_path, connection):

952

"""Overloading of standard D-Bus method.

953

954

Inserts property tags and interface annotation tags.

849

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

955

850

"""

956

851

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

957

852

connection)

964

859

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

965

860

return e

966

861

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

967

# Add property tags

968

862

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

969

863

for name, prop

970

in self._get_all_dbus_things("property")

864

in self._get_all_dbus_properties()

971

865

if prop._dbus_interface

972

866

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

973

867

if_tag.appendChild(tag)

974

# Add annotation tags

975

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

976

for tag in if_tag.getElementsByTagName(typ):

977

annots = dict()

978

for name, prop in (self.

979

_get_all_dbus_things(typ)):

980

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

981

and prop._dbus_interface

982

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

983

annots.update(getattr

984

(prop,

985

"_dbus_annotations",

986

{}))

987

for name, value in annots.iteritems():

988

ann_tag = document.createElement(

989

"annotation")

990

ann_tag.setAttribute("name", name)

991

ann_tag.setAttribute("value", value)

992

tag.appendChild(ann_tag)

993

# Add interface annotation tags

994

for annotation, value in dict(

995

itertools.chain.from_iterable(

996

annotations().iteritems()

997

for name, annotations in

998

self._get_all_dbus_things("interface")

999

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

1000

)).iteritems():

1001

ann_tag = document.createElement("annotation")

1002

ann_tag.setAttribute("name", annotation)

1003

ann_tag.setAttribute("value", value)

1004

if_tag.appendChild(ann_tag)

1005

868

# Add the names to the return values for the

1006

869

# "org.freedesktop.DBus.Properties" methods

1007

870

if (if_tag.getAttribute("name")

1022

885

except (AttributeError, xml.dom.DOMException,

1023

886

xml.parsers.expat.ExpatError) as error:

1024

887

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

1025

exc_info=error)

888

error)

1026

889

return xmlstring

1027

890

1028

891

1029

def datetime_to_dbus(dt, variant_level=0):

892

def datetime_to_dbus (dt, variant_level=0):

1030

893

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

1031

894

if dt is None:

1032

895

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

1034

897

variant_level=variant_level)

1035

898

1036

899

1037

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1038

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

1039

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

1040

interface names according to the "alt_interface_names" mapping.

1041

Usage:

1042

1043

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

1044

"net.example.AlternateInterface"})

1045

class SampleDBusObject(dbus.service.Object):

1046

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

1047

def SampleDBusMethod():

1048

pass

1049

1050

The above "SampleDBusMethod" on "SampleDBusObject" will be

1051

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

1052

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

1053

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

1054

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

1055

1056

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

1057

(from DBusObjectWithProperties) and interfaces (from the

1058

dbus_interface_annotations decorator).

900

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

901

.__metaclass__):

902

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

903

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

1059

904

"""

1060

def wrapper(cls):

1061

for orig_interface_name, alt_interface_name in (

1062

alt_interface_names.iteritems()):

1063

attr = {}

1064

interface_names = set()

1065

# Go though all attributes of the class

1066

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

905

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

906

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

907

# methods, signals, or properties in them

908

for base in (b for b in bases

909

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

910

# Go though all attributes of the base class

911

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

1067

912

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

1068

913

# with the wrong interface name

1069

914

if (not hasattr(attribute, "_dbus_interface")

1070

915

or not attribute._dbus_interface

1071

.startswith(orig_interface_name)):

916

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

1072

917

continue

1073

918

# Create an alternate D-Bus interface name based on

1074

919

# the current name

1075

920

alt_interface = (attribute._dbus_interface

1076

.replace(orig_interface_name,

1077

alt_interface_name))

1078

interface_names.add(alt_interface)

921

.replace("se.recompile.Mandos",

922

"se.bsnet.fukt.Mandos"))

1079

923

# Is this a D-Bus signal?

1080

924

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

1081

925

# Extract the original non-method function by

1096

940

nonmethod_func.func_name,

1097

941

nonmethod_func.func_defaults,

1098

942

nonmethod_func.func_closure)))

1099

# Copy annotations, if any

1100

try:

1101

new_function._dbus_annotations = (

1102

dict(attribute._dbus_annotations))

1103

except AttributeError:

1104

pass

1105

943

# Define a creator of a function to call both the

1106

# original and alternate functions, so both the

1107

# original and alternate signals gets sent when

1108

# the function is called

944

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

945

# signals gets sent when the function is called

1109

946

def fixscope(func1, func2):

1110

947

"""This function is a scope container to pass

1111

948

func1 and func2 to the "call_both" function

1118

955

return call_both

1119

956

# Create the "call_both" function and add it to

1120

957

# the class

1121

attr[attrname] = fixscope(attribute, new_function)

958

attr[attrname] = fixscope(attribute,

959

new_function)

1122

960

# Is this a D-Bus method?

1123

961

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

1124

962

# Create a new, but exactly alike, function

1135

973

attribute.func_name,

1136

974

attribute.func_defaults,

1137

975

attribute.func_closure)))

1138

# Copy annotations, if any

1139

try:

1140

attr[attrname]._dbus_annotations = (

1141

dict(attribute._dbus_annotations))

1142

except AttributeError:

1143

pass

1144

976

# Is this a D-Bus property?

1145

977

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

1146

978

# Create a new, but exactly alike, function

1160

992

attribute.func_name,

1161

993

attribute.func_defaults,

1162

994

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

# Is this a D-Bus interface?

1170

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

1171

# Create a new, but exactly alike, function

1172

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

1173

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

1174

# to the class.

1175

attr[attrname] = (dbus_interface_annotations

1176

(alt_interface)

1177

(types.FunctionType

1178

(attribute.func_code,

1179

attribute.func_globals,

1180

attribute.func_name,

1181

attribute.func_defaults,

1182

attribute.func_closure)))

1183

if deprecate:

1184

# Deprecate all alternate interfaces

1185

iname="_AlternateDBusNames_interface_annotation{0}"

1186

for interface_name in interface_names:

1187

@dbus_interface_annotations(interface_name)

1188

def func(self):

1189

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

1190

"true" }

1191

# Find an unused name

1192

for aname in (iname.format(i)

1193

for i in itertools.count()):

1194

if aname not in attr:

1195

attr[aname] = func

1196

break

1197

if interface_names:

1198

# Replace the class with a new subclass of it with

1199

# methods, signals, etc. as created above.

1200

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

1201

(cls,), attr)

1202

return cls

1203

return wrapper

1204

1205

1206

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

1207

"se.bsnet.fukt.Mandos"})

995

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

996

997

1208

998

class ClientDBus(Client, DBusObjectWithProperties):

1209

999

"""A Client class using D-Bus

1210

1000

1221

1011

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

1222

1012

self.bus = bus

1223

1013

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

1014

1015

self._approvals_pending = 0

1224

1016

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

1225

1017

# the D-Bus

1226

1018

client_object_name = unicode(self.name).translate(

1230

1022

("/clients/" + client_object_name))

1231

1023

DBusObjectWithProperties.__init__(self, self.bus,

1232

1024

self.dbus_object_path)

1233

1025

1234

1026

def notifychangeproperty(transform_func,

1235

1027

dbus_name, type_func=lambda x: x,

1236

1028

variant_level=1):

1259

1051

1260

1052

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

1261

1053

1054

1262

1055

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1263

1056

approvals_pending = notifychangeproperty(dbus.Boolean,

1264

1057

"ApprovalPending",

1271

1064

checker is not None)

1272

1065

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1273

1066

"LastCheckedOK")

1274

last_checker_status = notifychangeproperty(dbus.Int16,

1275

"LastCheckerStatus")

1276

1067

last_approval_request = notifychangeproperty(

1277

1068

datetime_to_dbus, "LastApprovalRequest")

1278

1069

approved_by_default = notifychangeproperty(dbus.Boolean,

1279

1070

"ApprovedByDefault")

1280

approval_delay = notifychangeproperty(dbus.UInt64,

1071

approval_delay = notifychangeproperty(dbus.UInt16,

1281

1072

"ApprovalDelay",

1282

1073

type_func =

1283

timedelta_to_milliseconds)

1074

_timedelta_to_milliseconds)

1284

1075

approval_duration = notifychangeproperty(

1285

dbus.UInt64, "ApprovalDuration",

1286

type_func = timedelta_to_milliseconds)

1076

dbus.UInt16, "ApprovalDuration",

1077

type_func = _timedelta_to_milliseconds)

1287

1078

host = notifychangeproperty(dbus.String, "Host")

1288

timeout = notifychangeproperty(dbus.UInt64, "Timeout",

1079

timeout = notifychangeproperty(dbus.UInt16, "Timeout",

1289

1080

type_func =

1290

timedelta_to_milliseconds)

1081

_timedelta_to_milliseconds)

1291

1082

extended_timeout = notifychangeproperty(

1292

dbus.UInt64, "ExtendedTimeout",

1293

type_func = timedelta_to_milliseconds)

1294

interval = notifychangeproperty(dbus.UInt64,

1083

dbus.UInt16, "ExtendedTimeout",

1084

type_func = _timedelta_to_milliseconds)

1085

interval = notifychangeproperty(dbus.UInt16,

1295

1086

"Interval",

1296

1087

type_func =

1297

timedelta_to_milliseconds)

1088

_timedelta_to_milliseconds)

1298

1089

checker_command = notifychangeproperty(dbus.String, "Checker")

1299

1090

1300

1091

del notifychangeproperty

1342

1133

return r

1343

1134

1344

1135

def _reset_approved(self):

1345

self.approved = None

1136

self._approved = None

1346

1137

return False

1347

1138

1348

1139

def approve(self, value=True):

1349

self.approved = value

1350

gobject.timeout_add(timedelta_to_milliseconds

1140

self.send_changedstate()

1141

self._approved = value

1142

gobject.timeout_add(_timedelta_to_milliseconds

1351

1143

(self.approval_duration),

1352

1144

self._reset_approved)

1353

self.send_changedstate()

1145

1354

1146

1355

1147

## D-Bus methods, signals & properties

1356

1148

_interface = "se.recompile.Mandos.Client"

1357

1149

1358

## Interfaces

1359

1360

@dbus_interface_annotations(_interface)

1361

def _foo(self):

1362

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

1363

"false"}

1364

1365

1150

## Signals

1366

1151

1367

1152

# CheckerCompleted - signal

1403

1188

"D-Bus signal"

1404

1189

return self.need_approval()

1405

1190

1191

# NeRwequest - signal

1192

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

1193

def NewRequest(self, ip):

1194

"""D-Bus signal

1195

Is sent after a client request a password.

1196

"""

1197

pass

1198

1406

1199

## Methods

1407

1200

1408

1201

# Approve - method

1466

1259

access="readwrite")

1467

1260

def ApprovalDuration_dbus_property(self, value=None):

1468

1261

if value is None: # get

1469

return dbus.UInt64(timedelta_to_milliseconds(

1262

return dbus.UInt64(_timedelta_to_milliseconds(

1470

1263

self.approval_duration))

1471

1264

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

1472

1265

1486

1279

def Host_dbus_property(self, value=None):

1487

1280

if value is None: # get

1488

1281

return dbus.String(self.host)

1489

self.host = unicode(value)

1282

self.host = value

1490

1283

1491

1284

# Created - property

1492

1285

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

1518

1311

return

1519

1312

return datetime_to_dbus(self.last_checked_ok)

1520

1313

1521

# LastCheckerStatus - property

1522

@dbus_service_property(_interface, signature="n",

1523

access="read")

1524

def LastCheckerStatus_dbus_property(self):

1525

return dbus.Int16(self.last_checker_status)

1526

1527

1314

# Expires - property

1528

1315

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

1529

1316

def Expires_dbus_property(self):

1540

1327

def Timeout_dbus_property(self, value=None):

1541

1328

if value is None: # get

1542

1329

return dbus.UInt64(self.timeout_milliseconds())

1543

old_timeout = self.timeout

1544

1330

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

1545

# Reschedule disabling

1546

if self.enabled:

1547

now = datetime.datetime.utcnow()

1548

self.expires += self.timeout - old_timeout

1549

if self.expires <= now:

1550

# The timeout has passed

1551

self.disable()

1552

else:

1553

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

1554

is None):

1555

return

1556

gobject.source_remove(self.disable_initiator_tag)

1557

self.disable_initiator_tag = (

1558

gobject.timeout_add(

1559

timedelta_to_milliseconds(self.expires - now),

1560

self.disable))

1331

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

1332

return

1333

# Reschedule timeout

1334

gobject.source_remove(self.disable_initiator_tag)

1335

self.disable_initiator_tag = None

1336

self.expires = None

1337

time_to_die = _timedelta_to_milliseconds((self

1338

.last_checked_ok

1339

+ self.timeout)

1340

- datetime.datetime

1341

.utcnow())

1342

if time_to_die <= 0:

1343

# The timeout has passed

1344

self.disable()

1345

else:

1346

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

1347

+ datetime.timedelta(milliseconds =

1348

time_to_die))

1349

self.disable_initiator_tag = (gobject.timeout_add

1350

(time_to_die, self.disable))

1561

1351

1562

1352

# ExtendedTimeout - property

1563

1353

@dbus_service_property(_interface, signature="t",

1589

1379

def Checker_dbus_property(self, value=None):

1590

1380

if value is None: # get

1591

1381

return dbus.String(self.checker_command)

1592

self.checker_command = unicode(value)

1382

self.checker_command = value

1593

1383

1594

1384

# CheckerRunning - property

1595

1385

@dbus_service_property(_interface, signature="b",

1624

1414

raise KeyError()

1625

1415

1626

1416

def __getattribute__(self, name):

1627

if name == '_pipe':

1417

if(name == '_pipe'):

1628

1418

return super(ProxyClient, self).__getattribute__(name)

1629

1419

self._pipe.send(('getattr', name))

1630

1420

data = self._pipe.recv()

1637

1427

return func

1638

1428

1639

1429

def __setattr__(self, name, value):

1640

if name == '_pipe':

1430

if(name == '_pipe'):

1641

1431

return super(ProxyClient, self).__setattr__(name, value)

1642

1432

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

1643

1433

1644

1434

1435

class ClientDBusTransitional(ClientDBus):

1436

__metaclass__ = AlternateDBusNamesMetaclass

1437

1438

1645

1439

class ClientHandler(socketserver.BaseRequestHandler, object):

1646

1440

"""A class to handle client connections.

1647

1441

1708

1502

logger.warning("Bad certificate: %s", error)

1709

1503

return

1710

1504

logger.debug("Fingerprint: %s", fpr)

1505

if self.server.use_dbus:

1506

# Emit D-Bus signal

1507

client.NewRequest(str(self.client_address))

1711

1508

1712

1509

try:

1713

1510

client = ProxyClient(child_pipe, fpr,

1729

1526

client.Rejected("Disabled")

1730

1527

return

1731

1528

1732

if client.approved or not client.approval_delay:

1529

if client._approved or not client.approval_delay:

1733

1530

#We are approved or approval is disabled

1734

1531

break

1735

elif client.approved is None:

1532

elif client._approved is None:

1736

1533

logger.info("Client %s needs approval",

1737

1534

client.name)

1738

1535

if self.server.use_dbus:

1751

1548

#wait until timeout or approved

1752

1549

time = datetime.datetime.now()

1753

1550

client.changedstate.acquire()

1754

client.changedstate.wait(

1755

float(timedelta_to_milliseconds(delay)

1756

/ 1000))

1551

(client.changedstate.wait

1552

(float(client._timedelta_to_milliseconds(delay)

1553

/ 1000)))

1757

1554

client.changedstate.release()

1758

1555

time2 = datetime.datetime.now()

1759

1556

if (time2 - time) >= delay:

1775

1572

try:

1776

1573

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

1777

1574

except gnutls.errors.GNUTLSError as error:

1778

logger.warning("gnutls send failed",

1779

exc_info=error)

1575

logger.warning("gnutls send failed")

1780

1576

return

1781

1577

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

1782

1578

sent, len(client.secret)

1785

1581

1786

1582

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

1787

1583

# bump the timeout using extended_timeout

1788

client.bump_timeout(client.extended_timeout)

1584

client.checked_ok(client.extended_timeout)

1789

1585

if self.server.use_dbus:

1790

1586

# Emit D-Bus signal

1791

1587

client.GotSecret()

1796

1592

try:

1797

1593

session.bye()

1798

1594

except gnutls.errors.GNUTLSError as error:

1799

logger.warning("GnuTLS bye failed",

1800

exc_info=error)

1595

logger.warning("GnuTLS bye failed")

1801

1596

1802

1597

@staticmethod

1803

1598

def peer_certificate(session):

1868

1663

def sub_process_main(self, request, address):

1869

1664

try:

1870

1665

self.finish_request(request, address)

1871

except Exception:

1666

except:

1872

1667

self.handle_error(request, address)

1873

1668

self.close_request(request)

1874

1669

1875

1670

def process_request(self, request, address):

1876

1671

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

1877

1672

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

1878

args = (request, address))

1673

args = (request,

1674

address))

1879

1675

proc.start()

1880

1676

return proc

1881

1677

1909

1705

use_ipv6: Boolean; to use IPv6 or not

1910

1706

"""

1911

1707

def __init__(self, server_address, RequestHandlerClass,

1912

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

1913

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

1914

creating a new one with socket.socket().

1915

"""

1708

interface=None, use_ipv6=True):

1916

1709

self.interface = interface

1917

1710

if use_ipv6:

1918

1711

self.address_family = socket.AF_INET6

1919

if socketfd is not None:

1920

# Save the file descriptor

1921

self.socketfd = socketfd

1922

# Save the original socket.socket() function

1923

self.socket_socket = socket.socket

1924

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

1925

#

1926

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

1927

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

1928

# patching socket.socket.)

1929

#

1930

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

1931

@functools.wraps(socket.socket)

1932

def socket_wrapper(*args, **kwargs):

1933

# Restore original function so subsequent calls are

1934

# not affected.

1935

socket.socket = self.socket_socket

1936

del self.socket_socket

1937

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

1938

# saved file descriptor.

1939

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

1940

# Replace socket.socket() function with wrapper

1941

socket.socket = socket_wrapper

1942

# The socketserver.TCPServer.__init__ will call

1943

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

1944

# socket_wrapper(), if socketfd was set.

1945

1712

socketserver.TCPServer.__init__(self, server_address,

1946

1713

RequestHandlerClass)

1947

1948

1714

def server_bind(self):

1949

1715

"""This overrides the normal server_bind() function

1950

1716

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

1958

1724

try:

1959

1725

self.socket.setsockopt(socket.SOL_SOCKET,

1960

1726

SO_BINDTODEVICE,

1961

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

1727

str(self.interface

1728

+ '\0'))

1962

1729

except socket.error as error:

1963

if error.errno == errno.EPERM:

1964

logger.error("No permission to bind to"

1965

" interface %s", self.interface)

1966

elif error.errno == errno.ENOPROTOOPT:

1730

if error[0] == errno.EPERM:

1731

logger.error("No permission to"

1732

" bind to interface %s",

1733

self.interface)

1734

elif error[0] == errno.ENOPROTOOPT:

1967

1735

logger.error("SO_BINDTODEVICE not available;"

1968

1736

" cannot bind to interface %s",

1969

1737

self.interface)

1970

elif error.errno == errno.ENODEV:

1971

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

1972

" cannot bind", self.interface)

1973

1738

else:

1974

1739

raise

1975

1740

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

2005

1770

"""

2006

1771

def __init__(self, server_address, RequestHandlerClass,

2007

1772

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

2008

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

1773

gnutls_priority=None, use_dbus=True):

2009

1774

self.enabled = False

2010

1775

self.clients = clients

2011

1776

if self.clients is None:

2015

1780

IPv6_TCPServer.__init__(self, server_address,

2016

1781

RequestHandlerClass,

2017

1782

interface = interface,

2018

use_ipv6 = use_ipv6,

2019

socketfd = socketfd)

1783

use_ipv6 = use_ipv6)

2020

1784

def server_activate(self):

2021

1785

if self.enabled:

2022

1786

return socketserver.TCPServer.server_activate(self)

2035

1799

2036

1800

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

2037

1801

proc = None, client_object=None):

1802

condition_names = {

1803

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

1804

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

1805

# blocking).

1806

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

1807

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

1808

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

1809

# broken, usually for pipes and

1810

# sockets).

1811

}

1812

conditions_string = ' | '.join(name

1813

for cond, name in

1814

condition_names.iteritems()

1815

if cond & condition)

2038

1816

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

2039

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

1817

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

2040

1818

# Wait for other process to exit

2041

1819

proc.join()

2042

1820

return False

2100

1878

return True

2101

1879

2102

1880

2103

def rfc3339_duration_to_delta(duration):

2104

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

2105

2106

>>> rfc3339_duration_to_delta("P7D")

2107

datetime.timedelta(7)

2108

>>> rfc3339_duration_to_delta("PT60S")

2109

datetime.timedelta(0, 60)

2110

>>> rfc3339_duration_to_delta("PT60M")

2111

datetime.timedelta(0, 3600)

2112

>>> rfc3339_duration_to_delta("PT24H")

2113

datetime.timedelta(1)

2114

>>> rfc3339_duration_to_delta("P1W")

2115

datetime.timedelta(7)

2116

>>> rfc3339_duration_to_delta("PT5M30S")

2117

datetime.timedelta(0, 330)

2118

>>> rfc3339_duration_to_delta("P1DT3M20S")

2119

datetime.timedelta(1, 200)

2120

"""

2121

2122

# Parsing an RFC 3339 duration with regular expressions is not

2123

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

2124

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

2125

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

2126

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

2127

# avoid excessive use of external libraries.

2128

2129

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

2130

Token = collections.namedtuple("Token",

2131

("regexp", # To match token; if

2132

# "value" is not None,

2133

# must have a "group"

2134

# containing digits

2135

"value", # datetime.timedelta or

2136

# None

2137

"followers")) # Tokens valid after

2138

# this token

2139

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

2140

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

2141

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

2142

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

2143

datetime.timedelta(seconds=1),

2144

frozenset((token_end,)))

2145

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

2146

datetime.timedelta(minutes=1),

2147

frozenset((token_second, token_end)))

2148

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

2149

datetime.timedelta(hours=1),

2150

frozenset((token_minute, token_end)))

2151

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

2152

None,

2153

frozenset((token_hour, token_minute,

2154

token_second)))

2155

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

2156

datetime.timedelta(days=1),

2157

frozenset((token_time, token_end)))

2158

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

2159

datetime.timedelta(weeks=4),

2160

frozenset((token_day, token_end)))

2161

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

2162

datetime.timedelta(weeks=52),

2163

frozenset((token_month, token_end)))

2164

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

2165

datetime.timedelta(weeks=1),

2166

frozenset((token_end,)))

2167

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

2168

frozenset((token_year, token_month,

2169

token_day, token_time,

2170

token_week))),

2171

# Define starting values

2172

value = datetime.timedelta() # Value so far

2173

found_token = None

2174

followers = frozenset(token_duration,) # Following valid tokens

2175

s = duration # String left to parse

2176

# Loop until end token is found

2177

while found_token is not token_end:

2178

# Search for any currently valid tokens

2179

for token in followers:

2180

match = token.regexp.match(s)

2181

if match is not None:

2182

# Token found

2183

if token.value is not None:

2184

# Value found, parse digits

2185

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

2186

# Add to value so far

2187

value += factor * token.value

2188

# Strip token from string

2189

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

2190

# Go to found token

2191

found_token = token

2192

# Set valid next tokens

2193

followers = found_token.followers

2194

break

2195

else:

2196

# No currently valid tokens were found

2197

raise ValueError("Invalid RFC 3339 duration")

2198

# End token found

2199

return value

2200

2201

2202

1881

def string_to_delta(interval):

2203

1882

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

2204

1883

2215

1894

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

2216

1895

datetime.timedelta(0, 330)

2217

1896

"""

2218

2219

try:

2220

return rfc3339_duration_to_delta(interval)

2221

except ValueError:

2222

pass

2223

2224

1897

timevalue = datetime.timedelta(0)

2225

1898

for s in interval.split():

2226

1899

try:

2237

1910

elif suffix == "w":

2238

1911

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

2239

1912

else:

2240

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

2241

.format(suffix))

1913

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

2242

1914

except (ValueError, IndexError) as e:

2243

1915

raise ValueError(*(e.args))

2244

1916

timevalue += delta

2258

1930

sys.exit()

2259

1931

if not noclose:

2260

1932

# Close all standard open file descriptors

2261

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

1933

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

2262

1934

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

2263

1935

raise OSError(errno.ENODEV,

2264

"{0} not a character device"

2265

.format(os.devnull))

1936

"%s not a character device"

1937

% os.path.devnull)

2266

1938

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

2267

1939

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

2268

1940

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

2277

1949

2278

1950

parser = argparse.ArgumentParser()

2279

1951

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

2280

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

1952

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

2281

1953

help="show version number and exit")

2282

1954

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

2283

1955

help="Bind to interface IF")

2308

1980

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

2309

1981

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

2310

1982

" state")

2311

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

2312

help="Specify a file descriptor to a network"

2313

" socket to use instead of creating one")

2314

1983

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

2315

1984

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

2316

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

2317

help="Run in foreground")

2318

1985

2319

1986

options = parser.parse_args()

2320

1987

2335

2002

"use_ipv6": "True",

2336

2003

"debuglevel": "",

2337

2004

"restore": "True",

2338

"socket": "",

2339

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

2340

"foreground": "False",

2005

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

2341

2006

}

2342

2007

2343

2008

# Parse config file for server-global settings

2348

2013

# Convert the SafeConfigParser object to a dict

2349

2014

server_settings = server_config.defaults()

2350

2015

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

2351

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

2016

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

2352

2017

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

2353

2018

option)

2354

2019

if server_settings["port"]:

2355

2020

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

2356

2021

"port")

2357

if server_settings["socket"]:

2358

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

2359

"socket")

2360

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

2361

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

2362

# happen with a supplied network socket.

2363

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

2364

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

2365

["socket"])

2366

2022

del server_config

2367

2023

2368

2024

# Override the settings from the config file with command line

2370

2026

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

2371

2027

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

2372

2028

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

2373

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

2029

"statedir"):

2374

2030

value = getattr(options, option)

2375

2031

if value is not None:

2376

2032

server_settings[option] = value

2379

2035

for option in server_settings.keys():

2380

2036

if type(server_settings[option]) is str:

2381

2037

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

2382

# Debug implies foreground

2383

if server_settings["debug"]:

2384

server_settings["foreground"] = True

2385

2038

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

2386

2039

2387

2040

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

2393

2046

use_ipv6 = server_settings["use_ipv6"]

2394

2047

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

2395

2048

stored_state_file)

2396

foreground = server_settings["foreground"]

2397

2049

2398

2050

if debug:

2399

initlogger(debug, logging.DEBUG)

2051

initlogger(logging.DEBUG)

2400

2052

else:

2401

2053

if not debuglevel:

2402

initlogger(debug)

2054

initlogger()

2403

2055

else:

2404

2056

level = getattr(logging, debuglevel.upper())

2405

initlogger(debug, level)

2057

initlogger(level)

2406

2058

2407

2059

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

2408

2060

syslogger.setFormatter(logging.Formatter

2409

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

2410

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

2411

.format(server_settings

2412

["servicename"])))

2061

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

2062

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

2063

% server_settings["servicename"]))

2413

2064

2414

2065

# Parse config file with clients

2415

client_config = configparser.SafeConfigParser(Client

2416

.client_defaults)

2066

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

2067

"extended_timeout": "15m",

2068

"interval": "2m",

2069

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

2070

"host": "",

2071

"approval_delay": "0s",

2072

"approval_duration": "1s",

2073

}

2074

client_config = configparser.SafeConfigParser(client_defaults)

2417

2075

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

2418

2076

"clients.conf"))

2419

2077

2428

2086

use_ipv6=use_ipv6,

2429

2087

gnutls_priority=

2430

2088

server_settings["priority"],

2431

use_dbus=use_dbus,

2432

socketfd=(server_settings["socket"]

2433

or None))

2434

if not foreground:

2089

use_dbus=use_dbus)

2090

if not debug:

2435

2091

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

2436

pidfile = None

2437

2092

try:

2438

2093

pidfile = open(pidfilename, "w")

2439

except IOError as e:

2440

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

2441

exc_info=e)

2094

except IOError:

2095

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

2442

2096

2443

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

2097

try:

2098

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

2099

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

2100

except KeyError:

2444

2101

try:

2445

uid = pwd.getpwnam(name).pw_uid

2446

gid = pwd.getpwnam(name).pw_gid

2447

break

2102

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

2103

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

2448

2104

except KeyError:

2449

continue

2450

else:

2451

uid = 65534

2452

gid = 65534

2105

try:

2106

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

2107

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

2108

except KeyError:

2109

uid = 65534

2110

gid = 65534

2453

2111

try:

2454

2112

os.setgid(gid)

2455

2113

os.setuid(uid)

2456

2114

except OSError as error:

2457

if error.errno != errno.EPERM:

2115

if error[0] != errno.EPERM:

2458

2116

raise error

2459

2117

2460

2118

if debug:

2472

2130

.gnutls_global_set_log_function(debug_gnutls))

2473

2131

2474

2132

# Redirect stdin so all checkers get /dev/null

2475

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

2133

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

2476

2134

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

2477

2135

if null > 2:

2478

2136

os.close(null)

2137

else:

2138

# No console logging

2139

logger.removeHandler(console)

2479

2140

2480

2141

# Need to fork before connecting to D-Bus

2481

if not foreground:

2142

if not debug:

2482

2143

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

2483

2144

daemon()

2484

2145

2485

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

2486

# need to inform gobject that threads will be used.

2487

gobject.threads_init()

2488

2489

2146

global main_loop

2490

2147

# From the Avahi example code

2491

DBusGMainLoop(set_as_default=True)

2148

DBusGMainLoop(set_as_default=True )

2492

2149

main_loop = gobject.MainLoop()

2493

2150

bus = dbus.SystemBus()

2494

2151

# End of Avahi example code

2500

2157

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

2501

2158

do_not_queue=True))

2502

2159

except dbus.exceptions.NameExistsException as e:

2503

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

2160

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

2504

2161

use_dbus = False

2505

2162

server_settings["use_dbus"] = False

2506

2163

tcp_server.use_dbus = False

2518

2175

2519

2176

client_class = Client

2520

2177

if use_dbus:

2521

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

2522

2523

client_settings = Client.config_parser(client_config)

2178

client_class = functools.partial(ClientDBusTransitional,

2179

bus = bus)

2180

2181

special_settings = {

2182

# Some settings need to be accessd by special methods;

2183

# booleans need .getboolean(), etc. Here is a list of them:

2184

"approved_by_default":

2185

lambda section:

2186

client_config.getboolean(section, "approved_by_default"),

2187

"enabled":

2188

lambda section:

2189

client_config.getboolean(section, "enabled"),

2190

}

2191

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

2192

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

2193

# with exceptions for any special settings as defined above

2194

client_settings = dict((clientname,

2195

dict((setting,

2196

(value

2197

if setting not in special_settings

2198

else special_settings[setting]

2199

(clientname)))

2200

for setting, value in

2201

client_config.items(clientname)))

2202

for clientname in client_config.sections())

2203

2524

2204

old_client_settings = {}

2525

clients_data = {}

2205

clients_data = []

2526

2206

2527

2207

# Get client data and settings from last running state.

2528

2208

if server_settings["restore"]:

2532

2212

(stored_state))

2533

2213

os.remove(stored_state_path)

2534

2214

except IOError as e:

2535

if e.errno == errno.ENOENT:

2536

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

2537

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

2538

else:

2539

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

2540

exc_info=e)

2215

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

2216

.format(e))

2217

if e.errno != errno.ENOENT:

2541

2218

raise

2542

except EOFError as e:

2543

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

2544

"EOFError:", exc_info=e)

2545

2219

2546

with PGPEngine() as pgp:

2547

for client_name, client in clients_data.iteritems():

2220

with Crypto() as crypt:

2221

for client in clients_data:

2222

client_name = client["name"]

2223

2548

2224

# Decide which value to use after restoring saved state.

2549

2225

# We have three different values: Old config file,

2550

2226

# new config file, and saved state.

2558

2234

if (name != "secret" and

2559

2235

value != old_client_settings[client_name]

2560

2236

[name]):

2561

client[name] = value

2237

setattr(client, name, value)

2562

2238

except KeyError:

2563

2239

pass

2564

2240

2565

2241

# Clients who has passed its expire date can still be

2566

# enabled if its last checker was successful. Clients

2567

# whose checker succeeded before we stored its state is

2568

# assumed to have successfully run all checkers during

2569

# downtime.

2570

if client["enabled"]:

2571

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

2572

if not client["last_checked_ok"]:

2573

logger.warning(

2574

"disabling client {0} - Client never "

2575

"performed a successful checker"

2576

.format(client_name))

2577

client["enabled"] = False

2578

elif client["last_checker_status"] != 0:

2579

logger.warning(

2580

"disabling client {0} - Client "

2581

"last checker failed with error code {1}"

2582

.format(client_name,

2583

client["last_checker_status"]))

2242

# enabled if its last checker was sucessful. Clients

2243

# whose checker failed before we stored its state is

2244

# assumed to have failed all checkers during downtime.

2245

if client["enabled"] and client["last_checked_ok"]:

2246

if ((datetime.datetime.utcnow()

2247

- client["last_checked_ok"])

2248

> client["interval"]):

2249

if client["last_checker_status"] != 0:

2584

2250

client["enabled"] = False

2585

2251

else:

2586

2252

client["expires"] = (datetime.datetime

2587

2253

.utcnow()

2588

2254

+ client["timeout"])

2589

logger.debug("Last checker succeeded,"

2590

" keeping {0} enabled"

2591

.format(client_name))

2255

2256

client["changedstate"] = (multiprocessing_manager

2257

.Condition

2258

(multiprocessing_manager

2259

.Lock()))

2260

if use_dbus:

2261

new_client = (ClientDBusTransitional.__new__

2262

(ClientDBusTransitional))

2263

tcp_server.clients[client_name] = new_client

2264

new_client.bus = bus

2265

for name, value in client.iteritems():

2266

setattr(new_client, name, value)

2267

client_object_name = unicode(client_name).translate(

2268

{ord("."): ord("_"),

2269

ord("-"): ord("_")})

2270

new_client.dbus_object_path = (dbus.ObjectPath

2271

("/clients/"

2272

+ client_object_name))

2273

DBusObjectWithProperties.__init__(new_client,

2274

new_client.bus,

2275

new_client

2276

.dbus_object_path)

2277

else:

2278

tcp_server.clients[client_name] = (Client.__new__

2279

(Client))

2280

for name, value in client.iteritems():

2281

setattr(tcp_server.clients[client_name],

2282

name, value)

2283

2592

2284

try:

2593

client["secret"] = (

2594

pgp.decrypt(client["encrypted_secret"],

2595

client_settings[client_name]

2596

["secret"]))

2597

except PGPError:

2285

tcp_server.clients[client_name].secret = (

2286

crypt.decrypt(tcp_server.clients[client_name]

2287

.encrypted_secret,

2288

client_settings[client_name]

2289

["secret"]))

2290

except CryptoError:

2598

2291

# If decryption fails, we use secret from new settings

2599

logger.debug("Failed to decrypt {0} old secret"

2600

.format(client_name))

2601

client["secret"] = (

2292

tcp_server.clients[client_name].secret = (

2602

2293

client_settings[client_name]["secret"])

2603

2294

2604

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

2605

for client_name in (set(old_client_settings)

2606

- set(client_settings)):

2607

del clients_data[client_name]

2608

for client_name in (set(client_settings)

2609

- set(old_client_settings)):

2610

clients_data[client_name] = client_settings[client_name]

2611

2612

# Create all client objects

2613

for client_name, client in clients_data.iteritems():

2614

tcp_server.clients[client_name] = client_class(

2615

name = client_name, settings = client)

2295

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

2296

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

2297

del tcp_server.clients[clientname]

2298

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

2299

tcp_server.clients[clientname] = (client_class(name

2300

= clientname,

2301

config =

2302

client_settings

2303

[clientname]))

2616

2304

2617

2305

if not tcp_server.clients:

2618

2306

logger.warning("No clients defined")

2619

2620

if not foreground:

2621

if pidfile is not None:

2622

try:

2623

with pidfile:

2624

pid = os.getpid()

2625

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

2626

except IOError:

2627

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

2628

pidfilename, pid)

2629

del pidfile

2307

2308

if not debug:

2309

try:

2310

with pidfile:

2311

pid = os.getpid()

2312

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

2313

del pidfile

2314

except IOError:

2315

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

2316

pidfilename, pid)

2317

except NameError:

2318

# "pidfile" was never created

2319

pass

2630

2320

del pidfilename

2321

2322

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

2631

2323

2632

2324

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

2633

2325

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

2634

2326

2635

2327

if use_dbus:

2636

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

2637

"se.bsnet.fukt.Mandos"})

2638

class MandosDBusService(DBusObjectWithProperties):

2328

class MandosDBusService(dbus.service.Object):

2639

2329

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

2640

2330

def __init__(self):

2641

2331

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

2642

2332

_interface = "se.recompile.Mandos"

2643

2333

2644

@dbus_interface_annotations(_interface)

2645

def _foo(self):

2646

return { "org.freedesktop.DBus.Property"

2647

".EmitsChangedSignal":

2648

"false"}

2649

2650

2334

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

2651

2335

def ClientAdded(self, objpath):

2652

2336

"D-Bus signal"

2694

2378

2695

2379

del _interface

2696

2380

2697

mandos_dbus_service = MandosDBusService()

2381

class MandosDBusServiceTransitional(MandosDBusService):

2382

__metaclass__ = AlternateDBusNamesMetaclass

2383

mandos_dbus_service = MandosDBusServiceTransitional()

2698

2384

2699

2385

def cleanup():

2700

2386

"Cleanup function; run on exit"

2707

2393

# Store client before exiting. Secrets are encrypted with key

2708

2394

# based on what config file has. If config file is

2709

2395

# removed/edited, old secret will thus be unrecovable.

2710

clients = {}

2711

with PGPEngine() as pgp:

2396

clients = []

2397

with Crypto() as crypt:

2712

2398

for client in tcp_server.clients.itervalues():

2713

2399

key = client_settings[client.name]["secret"]

2714

client.encrypted_secret = pgp.encrypt(client.secret,

2715

key)

2400

client.encrypted_secret = crypt.encrypt(client.secret,

2401

key)

2716

2402

client_dict = {}

2717

2403

2718

# A list of attributes that can not be pickled

2719

# + secret.

2720

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

2721

"checker"))

2404

# A list of attributes that will not be stored when

2405

# shutting down.

2406

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

2722

2407

for name, typ in (inspect.getmembers

2723

2408

(dbus.service.Object)):

2724

2409

exclude.add(name)

2729

2414

if attr not in exclude:

2730

2415

client_dict[attr] = getattr(client, attr)

2731

2416

2732

clients[client.name] = client_dict

2417

clients.append(client_dict)

2733

2418

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

2734

2419

2735

2420

try:

2736

with (tempfile.NamedTemporaryFile

2737

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

2738

dir=os.path.dirname(stored_state_path),

2739

delete=False)) as stored_state:

2421

with os.fdopen(os.open(stored_state_path,

2422

os.O_CREAT|os.O_WRONLY|os.O_TRUNC,

2423

0600), "wb") as stored_state:

2740

2424

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

2741

tempname=stored_state.name

2742

os.rename(tempname, stored_state_path)

2743

2425

except (IOError, OSError) as e:

2744

if not debug:

2745

try:

2746

os.remove(tempname)

2747

except NameError:

2748

pass

2749

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

2750

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

2751

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

2752

else:

2753

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

2754

exc_info=e)

2755

raise e

2426

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

2427

.format(e))

2428

if e.errno not in (errno.ENOENT, errno.EACCES):

2429

raise

2756

2430

2757

2431

# Delete all clients, and settings from config

2758

2432

while tcp_server.clients:

2785

2459

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

2786

2460

if use_ipv6:

2787

2461

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

2788

" flowinfo %d, scope_id %d",

2789

*tcp_server.socket.getsockname())

2462

" flowinfo %d, scope_id %d"

2463

% tcp_server.socket.getsockname())

2790

2464

else: # IPv4

2791

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

2792

*tcp_server.socket.getsockname())

2465

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

2466

% tcp_server.socket.getsockname())

2793

2467

2794

2468

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

2795

2469

2798

2472

try:

2799

2473

service.activate()

2800

2474

except dbus.exceptions.DBusException as error:

2801

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

2475

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

2802

2476

cleanup()

2803

2477

sys.exit(1)

2804

2478

# End of Avahi example code

2811

2485

logger.debug("Starting main loop")

2812

2486

main_loop.run()

2813

2487

except AvahiError as error:

2814

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

2488

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

2815

2489

cleanup()

2816

2490

sys.exit(1)

2817

2491

except KeyboardInterrupt:

2822

2496

# Must run before the D-Bus bus name gets deregistered

2823

2497

cleanup()

2824

2498

2499

2825

2500

if __name__ == '__main__':

2826

2501

main()