/mandos/trunk : revision 526

11

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

12

#

13

# Everything else is

14

15

14

15

16

#

17

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

18

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

34

from __future__ import (division, absolute_import, print_function,

35

unicode_literals)

36

37

from future_builtins import *

38

39

37

import SocketServer as socketserver

40

38

import socket

41

39

import argparse

67

65

import types

68

66

import binascii

69

67

import tempfile

70

import itertools

71

import collections

72

68

73

69

import dbus

74

70

import dbus.service

79

75

import ctypes.util

80

76

import xml.dom.minidom

81

77

import inspect

78

import GnuPGInterface

82

79

83

80

try:

84

81

SO_BINDTODEVICE = socket.SO_BINDTODEVICE

88

85

except ImportError:

89

86

SO_BINDTODEVICE = None

90

87

91

version = "1.6.6"

88

version = "1.4.1"

92

89

stored_state_file = "clients.pickle"

93

90

94

91

logger = logging.getLogger()

95

syslogger = None

92

syslogger = (logging.handlers.SysLogHandler

93

(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

94

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

96

95

97

96

try:

98

97

if_nametoindex = (ctypes.cdll.LoadLibrary

111

110

return interface_index

112

111

113

112

114

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

113

def initlogger(level=logging.WARNING):

115

114

"""init logger and add loglevel"""

116

115

117

global syslogger

118

syslogger = (logging.handlers.SysLogHandler

119

(facility =

120

logging.handlers.SysLogHandler.LOG_DAEMON,

121

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

122

116

syslogger.setFormatter(logging.Formatter

123

117

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

124

118

' %(message)s'))

125

119

logger.addHandler(syslogger)

126

120

127

if debug:

128

console = logging.StreamHandler()

129

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

130

' [%(process)d]:'

131

' %(levelname)s:'

132

' %(message)s'))

133

logger.addHandler(console)

121

console = logging.StreamHandler()

122

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

123

' [%(process)d]:'

124

' %(levelname)s:'

125

' %(message)s'))

126

logger.addHandler(console)

134

127

logger.setLevel(level)

135

128

136

129

142

135

class PGPEngine(object):

143

136

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

144

137

def __init__(self):

138

self.gnupg = GnuPGInterface.GnuPG()

145

139

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

146

self.gnupgargs = ['--batch',

147

'--home', self.tempdir,

148

'--force-mdc',

149

'--quiet',

150

'--no-use-agent']

140

self.gnupg = GnuPGInterface.GnuPG()

141

self.gnupg.options.meta_interactive = False

142

self.gnupg.options.homedir = self.tempdir

143

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

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

175

169

def password_encode(self, password):

176

170

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

177

171

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

178

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

179

if len(encoded) > 2048:

180

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

181

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

182

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

183

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

184

return encoded

172

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

185

173

186

174

def encrypt(self, data, password):

187

passphrase = self.password_encode(password)

188

with tempfile.NamedTemporaryFile(dir=self.tempdir

189

) as passfile:

190

passfile.write(passphrase)

191

passfile.flush()

192

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

193

'--passphrase-file',

194

passfile.name]

195

+ self.gnupgargs,

196

stdin = subprocess.PIPE,

197

stdout = subprocess.PIPE,

198

stderr = subprocess.PIPE)

199

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

200

if proc.returncode != 0:

201

raise PGPError(err)

175

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

176

with open(os.devnull) as devnull:

177

try:

178

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

179

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

180

attach_fhs={'stderr': devnull})

181

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

182

f.write(data)

183

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

184

ciphertext = f.read()

185

proc.wait()

186

except IOError as e:

187

raise PGPError(e)

188

self.gnupg.passphrase = None

202

189

return ciphertext

203

190

204

191

def decrypt(self, data, password):

205

passphrase = self.password_encode(password)

206

with tempfile.NamedTemporaryFile(dir = self.tempdir

207

) as passfile:

208

passfile.write(passphrase)

209

passfile.flush()

210

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

211

'--passphrase-file',

212

passfile.name]

213

+ self.gnupgargs,

214

stdin = subprocess.PIPE,

215

stdout = subprocess.PIPE,

216

stderr = subprocess.PIPE)

217

decrypted_plaintext, err = proc.communicate(input

218

= data)

219

if proc.returncode != 0:

220

raise PGPError(err)

192

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

193

with open(os.devnull) as devnull:

194

try:

195

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

196

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

197

attach_fhs={'stderr': devnull})

198

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

199

f.write(data)

200

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

201

decrypted_plaintext = f.read()

202

proc.wait()

203

except IOError as e:

204

raise PGPError(e)

205

self.gnupg.passphrase = None

221

206

return decrypted_plaintext

222

207

223

208

209

224

210

class AvahiError(Exception):

225

211

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

226

212

self.value = value

243

229

Used to optionally bind to the specified interface.

244

230

name: string; Example: 'Mandos'

245

231

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

246

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

232

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

247

233

port: integer; what port to announce

248

234

TXT: list of strings; TXT record for the service

249

235

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

255

241

server: D-Bus Server

256

242

bus: dbus.SystemBus()

257

243

"""

258

259

244

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

260

245

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

261

246

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

274

259

self.server = None

275

260

self.bus = bus

276

261

self.entry_group_state_changed_match = None

277

278

262

def rename(self):

279

263

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

280

264

if self.rename_count >= self.max_renames:

290

274

try:

291

275

self.add()

292

276

except dbus.exceptions.DBusException as error:

293

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

277

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

294

278

self.cleanup()

295

279

os._exit(1)

296

280

self.rename_count += 1

297

298

281

def remove(self):

299

282

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

300

283

if self.entry_group_state_changed_match is not None:

302

285

self.entry_group_state_changed_match = None

303

286

if self.group is not None:

304

287

self.group.Reset()

305

306

288

def add(self):

307

289

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

308

290

self.remove()

325

307

dbus.UInt16(self.port),

326

308

avahi.string_array_to_txt_array(self.TXT))

327

309

self.group.Commit()

328

329

310

def entry_group_state_changed(self, state, error):

330

311

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

331

312

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

338

319

elif state == avahi.ENTRY_GROUP_FAILURE:

339

320

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

340

321

unicode(error))

341

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

342

.format(error))

343

322

raise AvahiGroupError("State changed: %s"

323

% unicode(error))

344

324

def cleanup(self):

345

325

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

346

326

if self.group is not None:

351

331

pass

352

332

self.group = None

353

333

self.remove()

354

355

334

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

356

335

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

357

336

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

376

355

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

377

356

else:

378

357

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

379

380

358

def activate(self):

381

359

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

382

360

if self.server is None:

389

367

self.server_state_changed)

390

368

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

391

369

392

393

370

class AvahiServiceToSyslog(AvahiService):

394

371

def rename(self):

395

372

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

396

373

ret = AvahiService.rename(self)

397

374

syslogger.setFormatter(logging.Formatter

398

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

399

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

400

.format(self.name)))

375

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

376

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

377

% self.name))

401

378

return ret

402

379

403

404

380

def timedelta_to_milliseconds(td):

405

381

"Convert a datetime.timedelta() to milliseconds"

406

382

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

407

383

+ (td.seconds * 1000)

408

384

+ (td.microseconds // 1000))

409

410

385

411

386

class Client(object):

412

387

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

413

388

438

413

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

439

414

last_checker_status: integer between 0 and 255 reflecting exit

440

415

status of last checker. -1 reflects crashed

441

checker, -2 means no checker completed yet.

416

checker, or None.

442

417

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

443

418

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

444

419

D-Bus identifiers

445

420

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

446

421

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

447

422

until this client is disabled

448

extended_timeout: extra long timeout when secret has been sent

423

extended_timeout: extra long timeout when password has been sent

449

424

runtime_expansions: Allowed attributes for runtime expansion.

450

425

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

451

426

disabled, or None

452

server_settings: The server_settings dict from main()

453

427

"""

454

428

455

429

runtime_expansions = ("approval_delay", "approval_duration",

456

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

457

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

458

"last_approval_request", "last_checked_ok",

430

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

431

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

459

432

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

460

client_defaults = { "timeout": "PT5M",

461

"extended_timeout": "PT15M",

462

"interval": "PT2M",

433

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

434

"extended_timeout": "15m",

435

"interval": "2m",

463

436

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

464

437

"host": "",

465

"approval_delay": "PT0S",

466

"approval_duration": "PT1S",

438

"approval_delay": "0s",

439

"approval_duration": "1s",

467

440

"approved_by_default": "True",

468

441

"enabled": "True",

469

442

}

482

455

483

456

def approval_delay_milliseconds(self):

484

457

return timedelta_to_milliseconds(self.approval_delay)

485

458

486

459

@staticmethod

487

460

def config_parser(config):

488

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

461

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

489

462

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

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

"""

463

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

494

464

settings = {}

495

465

for client_name in config.sections():

496

466

section = dict(config.items(client_name))

500

470

# Reformat values from string types to Python types

501

471

client["approved_by_default"] = config.getboolean(

502

472

client_name, "approved_by_default")

503

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

504

"enabled")

473

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

505

474

506

475

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

507

476

.replace(" ", ""))

513

482

"rb") as secfile:

514

483

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

515

484

else:

516

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

517

.format(section))

485

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

486

% section)

518

487

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

519

488

client["extended_timeout"] = string_to_delta(

520

489

section["extended_timeout"])

526

495

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

527

496

client["last_approval_request"] = None

528

497

client["last_checked_ok"] = None

529

client["last_checker_status"] = -2

530

498

client["last_checker_status"] = None

499

if client["enabled"]:

500

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

501

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

502

+ client["timeout"])

503

else:

504

client["last_enabled"] = None

505

client["expires"] = None

506

531

507

return settings

532

533

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

508

509

510

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

511

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

512

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

513

attribute."""

534

514

self.name = name

535

if server_settings is None:

536

server_settings = {}

537

self.server_settings = server_settings

538

515

# adding all client settings

539

516

for setting, value in settings.iteritems():

540

517

setattr(self, setting, value)

541

518

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

552

519

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

553

520

# Uppercase and remove spaces from fingerprint for later

554

521

# comparison purposes with return value from the fingerprint()

555

522

# function

556

523

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

557

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

558

datetime.datetime.utcnow())

559

524

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

525

560

526

# attributes specific for this server instance

561

527

self.checker = None

562

528

self.checker_initiator_tag = None

590

556

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

591

557

# Already enabled

592

558

return

559

self.send_changedstate()

593

560

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

594

561

self.enabled = True

595

562

self.last_enabled = datetime.datetime.utcnow()

596

563

self.init_checker()

597

self.send_changedstate()

598

564

599

565

def disable(self, quiet=True):

600

566

"""Disable this client."""

601

567

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

602

568

return False

603

569

if not quiet:

570

self.send_changedstate()

571

if not quiet:

604

572

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

605

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

573

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

606

574

gobject.source_remove(self.disable_initiator_tag)

607

575

self.disable_initiator_tag = None

608

576

self.expires = None

609

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

577

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

610

578

gobject.source_remove(self.checker_initiator_tag)

611

579

self.checker_initiator_tag = None

612

580

self.stop_checker()

613

581

self.enabled = False

614

if not quiet:

615

self.send_changedstate()

616

582

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

617

583

return False

618

584

622

588

def init_checker(self):

623

589

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

624

590

# and every interval from then on.

625

if self.checker_initiator_tag is not None:

626

gobject.source_remove(self.checker_initiator_tag)

627

591

self.checker_initiator_tag = (gobject.timeout_add

628

592

(self.interval_milliseconds(),

629

593

self.start_checker))

630

594

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

631

if self.disable_initiator_tag is not None:

632

gobject.source_remove(self.disable_initiator_tag)

633

595

self.disable_initiator_tag = (gobject.timeout_add

634

596

(self.timeout_milliseconds(),

635

597

self.disable))

654

616

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

655

617

vars(self))

656

618

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."""

619

def checked_ok(self, timeout=None):

620

"""Bump up the timeout for this client.

621

622

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

623

alive and well.

624

"""

665

625

if timeout is None:

666

626

timeout = self.timeout

627

self.last_checked_ok = datetime.datetime.utcnow()

667

628

if self.disable_initiator_tag is not None:

668

629

gobject.source_remove(self.disable_initiator_tag)

669

self.disable_initiator_tag = None

670

630

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

671

631

self.disable_initiator_tag = (gobject.timeout_add

672

632

(timedelta_to_milliseconds

682

642

If a checker already exists, leave it running and do

683

643

nothing."""

684

644

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

685

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

686

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

687

# would inevitably timeout, since no checker would get a

688

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

645

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

646

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

647

# client would inevitably timeout, since no checker would get

648

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

689

649

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

690

650

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

691

651

# should be.

693

653

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

694

654

try:

695

655

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

696

except AttributeError:

697

pass

698

except OSError as error:

699

if error.errno != errno.ECHILD:

700

raise

656

except (AttributeError, OSError) as error:

657

if (isinstance(error, OSError)

658

and error.errno != errno.ECHILD):

659

raise error

701

660

else:

702

661

if pid:

703

662

logger.warning("Checker was a zombie")

706

665

self.current_checker_command)

707

666

# Start a new checker if needed

708

667

if self.checker is None:

709

# Escape attributes for the shell

710

escaped_attrs = dict(

711

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

712

for attr in

713

self.runtime_expansions)

714

668

try:

715

command = self.checker_command % escaped_attrs

716

except TypeError as error:

717

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

718

self.checker_command, exc_info=error)

719

return True # Try again later

669

# In case checker_command has exactly one % operator

670

command = self.checker_command % self.host

671

except TypeError:

672

# Escape attributes for the shell

673

escaped_attrs = dict(

674

(attr,

675

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

676

errors=

677

'replace')))

678

for attr in

679

self.runtime_expansions)

680

681

try:

682

command = self.checker_command % escaped_attrs

683

except TypeError as error:

684

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

685

' %s', self.checker_command, error)

686

return True # Try again later

720

687

self.current_checker_command = command

721

688

try:

722

689

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

725

692

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

726

693

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

727

694

# always replaced by /dev/null.)

728

# The exception is when not debugging but nevertheless

729

# running in the foreground; use the previously

730

# created wnull.

731

popen_args = {}

732

if (not self.server_settings["debug"]

733

and self.server_settings["foreground"]):

734

popen_args.update({"stdout": wnull,

735

"stderr": wnull })

736

695

self.checker = subprocess.Popen(command,

737

696

close_fds=True,

738

shell=True, cwd="/",

739

**popen_args)

740

except OSError as error:

741

logger.error("Failed to start subprocess",

742

exc_info=error)

743

return True

744

self.checker_callback_tag = (gobject.child_watch_add

745

(self.checker.pid,

746

self.checker_callback,

747

data=command))

748

# The checker may have completed before the gobject

749

# watch was added. Check for this.

750

try:

697

shell=True, cwd="/")

698

self.checker_callback_tag = (gobject.child_watch_add

699

(self.checker.pid,

700

self.checker_callback,

701

data=command))

702

# The checker may have completed before the gobject

703

# watch was added. Check for this.

751

704

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

705

if pid:

706

gobject.source_remove(self.checker_callback_tag)

707

self.checker_callback(pid, status, command)

752

708

except OSError as error:

753

if error.errno == errno.ECHILD:

754

# This should never happen

755

logger.error("Child process vanished",

756

exc_info=error)

757

return True

758

raise

759

if pid:

760

gobject.source_remove(self.checker_callback_tag)

761

self.checker_callback(pid, status, command)

709

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

710

error)

762

711

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

763

712

return True

764

713

771

720

return

772

721

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

773

722

try:

774

self.checker.terminate()

723

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

775

724

#time.sleep(0.5)

776

725

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

777

# self.checker.kill()

726

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

778

727

except OSError as error:

779

728

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

780

729

raise

797

746

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

798

747

if byte_arrays and signature != "ay":

799

748

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

800

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

749

" signature %r" % signature)

801

750

def decorator(func):

802

751

func._dbus_is_property = True

803

752

func._dbus_interface = dbus_interface

811

760

return decorator

812

761

813

762

814

def dbus_interface_annotations(dbus_interface):

815

"""Decorator for marking functions returning interface annotations

816

817

Usage:

818

819

@dbus_interface_annotations("org.example.Interface")

820

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

821

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

822

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

823

"false"}

824

"""

825

def decorator(func):

826

func._dbus_is_interface = True

827

func._dbus_interface = dbus_interface

828

func._dbus_name = dbus_interface

829

return func

830

return decorator

831

832

833

def dbus_annotations(annotations):

834

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

835

Usage:

836

837

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

838

access="r")

839

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

840

"org.freedesktop.DBus.Property."

841

"EmitsChangedSignal": "false"})

842

def Property_dbus_property(self):

843

return dbus.Boolean(False)

844

"""

845

def decorator(func):

846

func._dbus_annotations = annotations

847

return func

848

return decorator

849

850

851

763

class DBusPropertyException(dbus.exceptions.DBusException):

852

764

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

853

765

"""

876

788

"""

877

789

878

790

@staticmethod

879

def _is_dbus_thing(thing):

880

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

881

882

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

883

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

884

"""

885

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

886

False)

791

def _is_dbus_property(obj):

792

return getattr(obj, "_dbus_is_property", False)

887

793

888

def _get_all_dbus_things(self, thing):

794

def _get_all_dbus_properties(self):

889

795

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

890

796

"""

891

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

892

name),

893

athing.__get__(self))

797

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

894

798

for cls in self.__class__.__mro__

895

for name, athing in

896

inspect.getmembers(cls,

897

self._is_dbus_thing(thing)))

799

for name, prop in

800

inspect.getmembers(cls, self._is_dbus_property))

898

801

899

802

def _get_dbus_property(self, interface_name, property_name):

900

803

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

902

805

"""

903

806

for cls in self.__class__.__mro__:

904

807

for name, value in (inspect.getmembers

905

(cls,

906

self._is_dbus_thing("property"))):

808

(cls, self._is_dbus_property)):

907

809

if (value._dbus_name == property_name

908

810

and value._dbus_interface == interface_name):

909

811

return value.__get__(self)

937

839

# The byte_arrays option is not supported yet on

938

840

# signatures other than "ay".

939

841

if prop._dbus_signature != "ay":

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))

842

raise ValueError

843

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

844

for byte in value))

945

845

prop(value)

946

846

947

847

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

953

853

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

954

854

"""

955

855

properties = {}

956

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

856

for name, prop in self._get_all_dbus_properties():

957

857

if (interface_name

958

858

and interface_name != prop._dbus_interface):

959

859

# Interface non-empty but did not match

974

874

path_keyword='object_path',

975

875

connection_keyword='connection')

976

876

def Introspect(self, object_path, connection):

977

"""Overloading of standard D-Bus method.

978

979

Inserts property tags and interface annotation tags.

877

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

980

878

"""

981

879

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

982

880

connection)

989

887

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

990

888

return e

991

889

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

992

# Add property tags

993

890

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

994

891

for name, prop

995

in self._get_all_dbus_things("property")

892

in self._get_all_dbus_properties()

996

893

if prop._dbus_interface

997

894

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

998

895

if_tag.appendChild(tag)

999

# Add annotation tags

1000

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

1001

for tag in if_tag.getElementsByTagName(typ):

1002

annots = dict()

1003

for name, prop in (self.

1004

_get_all_dbus_things(typ)):

1005

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

1006

and prop._dbus_interface

1007

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

1008

annots.update(getattr

1009

(prop,

1010

"_dbus_annotations",

1011

{}))

1012

for name, value in annots.iteritems():

1013

ann_tag = document.createElement(

1014

"annotation")

1015

ann_tag.setAttribute("name", name)

1016

ann_tag.setAttribute("value", value)

1017

tag.appendChild(ann_tag)

1018

# Add interface annotation tags

1019

for annotation, value in dict(

1020

itertools.chain.from_iterable(

1021

annotations().iteritems()

1022

for name, annotations in

1023

self._get_all_dbus_things("interface")

1024

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

1025

)).iteritems():

1026

ann_tag = document.createElement("annotation")

1027

ann_tag.setAttribute("name", annotation)

1028

ann_tag.setAttribute("value", value)

1029

if_tag.appendChild(ann_tag)

1030

896

# Add the names to the return values for the

1031

897

# "org.freedesktop.DBus.Properties" methods

1032

898

if (if_tag.getAttribute("name")

1047

913

except (AttributeError, xml.dom.DOMException,

1048

914

xml.parsers.expat.ExpatError) as error:

1049

915

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

1050

exc_info=error)

916

error)

1051

917

return xmlstring

1052

918

1053

919

1054

def datetime_to_dbus(dt, variant_level=0):

920

def datetime_to_dbus (dt, variant_level=0):

1055

921

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

1056

922

if dt is None:

1057

923

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

1059

925

variant_level=variant_level)

1060

926

1061

927

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).

928

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

929

.__metaclass__):

930

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

931

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

1084

932

"""

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):

933

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

934

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

935

# methods, signals, or properties in them

936

for base in (b for b in bases

937

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

938

# Go though all attributes of the base class

939

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

1092

940

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

1093

941

# with the wrong interface name

1094

942

if (not hasattr(attribute, "_dbus_interface")

1095

943

or not attribute._dbus_interface

1096

.startswith(orig_interface_name)):

944

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

1097

945

continue

1098

946

# Create an alternate D-Bus interface name based on

1099

947

# the current name

1100

948

alt_interface = (attribute._dbus_interface

1101

.replace(orig_interface_name,

1102

alt_interface_name))

1103

interface_names.add(alt_interface)

949

.replace("se.recompile.Mandos",

950

"se.bsnet.fukt.Mandos"))

1104

951

# Is this a D-Bus signal?

1105

952

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

1106

# Extract the original non-method undecorated

1107

# function by black magic

953

# Extract the original non-method function by

954

# black magic

1108

955

nonmethod_func = (dict(

1109

956

zip(attribute.func_code.co_freevars,

1110

957

attribute.__closure__))["func"]

1121

968

nonmethod_func.func_name,

1122

969

nonmethod_func.func_defaults,

1123

970

nonmethod_func.func_closure)))

1124

# Copy annotations, if any

1125

try:

1126

new_function._dbus_annotations = (

1127

dict(attribute._dbus_annotations))

1128

except AttributeError:

1129

pass

1130

971

# Define a creator of a function to call both the

1131

# original and alternate functions, so both the

1132

# original and alternate signals gets sent when

1133

# the function is called

972

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

973

# signals gets sent when the function is called

1134

974

def fixscope(func1, func2):

1135

975

"""This function is a scope container to pass

1136

976

func1 and func2 to the "call_both" function

1143

983

return call_both

1144

984

# Create the "call_both" function and add it to

1145

985

# the class

1146

attr[attrname] = fixscope(attribute, new_function)

986

attr[attrname] = fixscope(attribute,

987

new_function)

1147

988

# Is this a D-Bus method?

1148

989

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

1149

990

# Create a new, but exactly alike, function

1160

1001

attribute.func_name,

1161

1002

attribute.func_defaults,

1162

1003

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

1004

# Is this a D-Bus property?

1170

1005

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

1171

1006

# Create a new, but exactly alike, function

1185

1020

attribute.func_name,

1186

1021

attribute.func_defaults,

1187

1022

attribute.func_closure)))

1188

# Copy annotations, if any

1189

try:

1190

attr[attrname]._dbus_annotations = (

1191

dict(attribute._dbus_annotations))

1192

except AttributeError:

1193

pass

1194

# Is this a D-Bus interface?

1195

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

1196

# Create a new, but exactly alike, function

1197

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

1198

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

1199

# to the class.

1200

attr[attrname] = (dbus_interface_annotations

1201

(alt_interface)

1202

(types.FunctionType

1203

(attribute.func_code,

1204

attribute.func_globals,

1205

attribute.func_name,

1206

attribute.func_defaults,

1207

attribute.func_closure)))

1208

if deprecate:

1209

# Deprecate all alternate interfaces

1210

iname="_AlternateDBusNames_interface_annotation{0}"

1211

for interface_name in interface_names:

1212

@dbus_interface_annotations(interface_name)

1213

def func(self):

1214

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

1215

"true" }

1216

# Find an unused name

1217

for aname in (iname.format(i)

1218

for i in itertools.count()):

1219

if aname not in attr:

1220

attr[aname] = func

1221

break

1222

if interface_names:

1223

# Replace the class with a new subclass of it with

1224

# methods, signals, etc. as created above.

1225

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

1226

(cls,), attr)

1227

return cls

1228

return wrapper

1229

1230

1231

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

1232

"se.bsnet.fukt.Mandos"})

1023

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

1024

1025

1233

1026

class ClientDBus(Client, DBusObjectWithProperties):

1234

1027

"""A Client class using D-Bus

1235

1028

1246

1039

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

1247

1040

self.bus = bus

1248

1041

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

1042

self._approvals_pending = 0

1043

1044

self._approvals_pending = 0

1249

1045

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

1250

1046

# the D-Bus

1251

1047

client_object_name = unicode(self.name).translate(

1255

1051

("/clients/" + client_object_name))

1256

1052

DBusObjectWithProperties.__init__(self, self.bus,

1257

1053

self.dbus_object_path)

1258

1054

1259

1055

def notifychangeproperty(transform_func,

1260

1056

dbus_name, type_func=lambda x: x,

1261

1057

variant_level=1):

1284

1080

1285

1081

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

1286

1082

1083

1287

1084

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1288

1085

approvals_pending = notifychangeproperty(dbus.Boolean,

1289

1086

"ApprovalPending",

1296

1093

checker is not None)

1297

1094

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1298

1095

"LastCheckedOK")

1299

last_checker_status = notifychangeproperty(dbus.Int16,

1300

"LastCheckerStatus")

1301

1096

last_approval_request = notifychangeproperty(

1302

1097

datetime_to_dbus, "LastApprovalRequest")

1303

1098

approved_by_default = notifychangeproperty(dbus.Boolean,

1353

1148

*args, **kwargs)

1354

1149

1355

1150

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

1356

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

1151

old_checker = self.checker

1152

if self.checker is not None:

1153

old_checker_pid = self.checker.pid

1154

else:

1155

old_checker_pid = None

1357

1156

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

1358

1157

# Only if new checker process was started

1359

1158

if (self.checker is not None

1367

1166

return False

1368

1167

1369

1168

def approve(self, value=True):

1169

self.send_changedstate()

1370

1170

self.approved = value

1371

1171

gobject.timeout_add(timedelta_to_milliseconds

1372

1172

(self.approval_duration),

1373

1173

self._reset_approved)

1374

self.send_changedstate()

1174

1375

1175

1376

1176

## D-Bus methods, signals & properties

1377

1177

_interface = "se.recompile.Mandos.Client"

1378

1178

1379

## Interfaces

1380

1381

@dbus_interface_annotations(_interface)

1382

def _foo(self):

1383

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

1384

"false"}

1385

1386

1179

## Signals

1387

1180

1388

1181

# CheckerCompleted - signal

1424

1217

"D-Bus signal"

1425

1218

return self.need_approval()

1426

1219

1220

# NeRwequest - signal

1221

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

1222

def NewRequest(self, ip):

1223

"""D-Bus signal

1224

Is sent after a client request a password.

1225

"""

1226

pass

1227

1427

1228

## Methods

1428

1229

1429

1230

# Approve - method

1539

1340

return

1540

1341

return datetime_to_dbus(self.last_checked_ok)

1541

1342

1542

# LastCheckerStatus - property

1543

@dbus_service_property(_interface, signature="n",

1544

access="read")

1545

def LastCheckerStatus_dbus_property(self):

1546

return dbus.Int16(self.last_checker_status)

1547

1548

1343

# Expires - property

1549

1344

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

1550

1345

def Expires_dbus_property(self):

1561

1356

def Timeout_dbus_property(self, value=None):

1562

1357

if value is None: # get

1563

1358

return dbus.UInt64(self.timeout_milliseconds())

1564

old_timeout = self.timeout

1565

1359

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

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))

1360

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

1361

return

1362

# Reschedule timeout

1363

gobject.source_remove(self.disable_initiator_tag)

1364

self.disable_initiator_tag = None

1365

self.expires = None

1366

time_to_die = timedelta_to_milliseconds((self

1367

.last_checked_ok

1368

+ self.timeout)

1369

- datetime.datetime

1370

.utcnow())

1371

if time_to_die <= 0:

1372

# The timeout has passed

1373

self.disable()

1374

else:

1375

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

1376

+ datetime.timedelta(milliseconds =

1377

time_to_die))

1378

self.disable_initiator_tag = (gobject.timeout_add

1379

(time_to_die, self.disable))

1582

1380

1583

1381

# ExtendedTimeout - property

1584

1382

@dbus_service_property(_interface, signature="t",

1663

1461

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

1664

1462

1665

1463

1464

class ClientDBusTransitional(ClientDBus):

1465

__metaclass__ = AlternateDBusNamesMetaclass

1466

1467

1666

1468

class ClientHandler(socketserver.BaseRequestHandler, object):

1667

1469

"""A class to handle client connections.

1668

1470

1704

1506

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

1705

1507

try:

1706

1508

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

1707

raise RuntimeError(line)

1509

raise RuntimeError

1708

1510

except (ValueError, IndexError, RuntimeError) as error:

1709

1511

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

1710

1512

return

1736

1538

except KeyError:

1737

1539

return

1738

1540

1541

if self.server.use_dbus:

1542

# Emit D-Bus signal

1543

client.NewRequest(str(self.client_address))

1544

1739

1545

if client.approval_delay:

1740

1546

delay = client.approval_delay

1741

1547

client.approvals_pending += 1

1772

1578

#wait until timeout or approved

1773

1579

time = datetime.datetime.now()

1774

1580

client.changedstate.acquire()

1775

client.changedstate.wait(

1776

float(timedelta_to_milliseconds(delay)

1777

/ 1000))

1581

(client.changedstate.wait

1582

(float(client.timedelta_to_milliseconds(delay)

1583

/ 1000)))

1778

1584

client.changedstate.release()

1779

1585

time2 = datetime.datetime.now()

1780

1586

if (time2 - time) >= delay:

1796

1602

try:

1797

1603

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

1798

1604

except gnutls.errors.GNUTLSError as error:

1799

logger.warning("gnutls send failed",

1800

exc_info=error)

1605

logger.warning("gnutls send failed")

1801

1606

return

1802

1607

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

1803

1608

sent, len(client.secret)

1806

1611

1807

1612

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

1808

1613

# bump the timeout using extended_timeout

1809

client.bump_timeout(client.extended_timeout)

1614

client.checked_ok(client.extended_timeout)

1810

1615

if self.server.use_dbus:

1811

1616

# Emit D-Bus signal

1812

1617

client.GotSecret()

1817

1622

try:

1818

1623

session.bye()

1819

1624

except gnutls.errors.GNUTLSError as error:

1820

logger.warning("GnuTLS bye failed",

1821

exc_info=error)

1625

logger.warning("GnuTLS bye failed")

1822

1626

1823

1627

@staticmethod

1824

1628

def peer_certificate(session):

1896

1700

def process_request(self, request, address):

1897

1701

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

1898

1702

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

1899

args = (request, address))

1703

args = (request,

1704

address))

1900

1705

proc.start()

1901

1706

return proc

1902

1707

1917

1722

1918

1723

def add_pipe(self, parent_pipe, proc):

1919

1724

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

1920

raise NotImplementedError()

1725

raise NotImplementedError

1921

1726

1922

1727

1923

1728

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1930

1735

use_ipv6: Boolean; to use IPv6 or not

1931

1736

"""

1932

1737

def __init__(self, server_address, RequestHandlerClass,

1933

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

1934

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

1935

creating a new one with socket.socket().

1936

"""

1738

interface=None, use_ipv6=True):

1937

1739

self.interface = interface

1938

1740

if use_ipv6:

1939

1741

self.address_family = socket.AF_INET6

1940

if socketfd is not None:

1941

# Save the file descriptor

1942

self.socketfd = socketfd

1943

# Save the original socket.socket() function

1944

self.socket_socket = socket.socket

1945

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

1946

#

1947

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

1948

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

1949

# patching socket.socket.)

1950

#

1951

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

1952

@functools.wraps(socket.socket)

1953

def socket_wrapper(*args, **kwargs):

1954

# Restore original function so subsequent calls are

1955

# not affected.

1956

socket.socket = self.socket_socket

1957

del self.socket_socket

1958

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

1959

# saved file descriptor.

1960

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

1961

# Replace socket.socket() function with wrapper

1962

socket.socket = socket_wrapper

1963

# The socketserver.TCPServer.__init__ will call

1964

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

1965

# socket_wrapper(), if socketfd was set.

1966

1742

socketserver.TCPServer.__init__(self, server_address,

1967

1743

RequestHandlerClass)

1968

1969

1744

def server_bind(self):

1970

1745

"""This overrides the normal server_bind() function

1971

1746

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

1979

1754

try:

1980

1755

self.socket.setsockopt(socket.SOL_SOCKET,

1981

1756

SO_BINDTODEVICE,

1982

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

1757

str(self.interface

1758

+ '\0'))

1983

1759

except socket.error as error:

1984

if error.errno == errno.EPERM:

1985

logger.error("No permission to bind to"

1986

" interface %s", self.interface)

1987

elif error.errno == errno.ENOPROTOOPT:

1760

if error[0] == errno.EPERM:

1761

logger.error("No permission to"

1762

" bind to interface %s",

1763

self.interface)

1764

elif error[0] == errno.ENOPROTOOPT:

1988

1765

logger.error("SO_BINDTODEVICE not available;"

1989

1766

" cannot bind to interface %s",

1990

1767

self.interface)

1991

elif error.errno == errno.ENODEV:

1992

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

1993

" cannot bind", self.interface)

1994

1768

else:

1995

1769

raise

1996

1770

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

1999

1773

if self.address_family == socket.AF_INET6:

2000

1774

any_address = "::" # in6addr_any

2001

1775

else:

2002

any_address = "0.0.0.0" # INADDR_ANY

1776

any_address = socket.INADDR_ANY

2003

1777

self.server_address = (any_address,

2004

1778

self.server_address[1])

2005

1779

elif not self.server_address[1]:

2026

1800

"""

2027

1801

def __init__(self, server_address, RequestHandlerClass,

2028

1802

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

2029

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

1803

gnutls_priority=None, use_dbus=True):

2030

1804

self.enabled = False

2031

1805

self.clients = clients

2032

1806

if self.clients is None:

2036

1810

IPv6_TCPServer.__init__(self, server_address,

2037

1811

RequestHandlerClass,

2038

1812

interface = interface,

2039

use_ipv6 = use_ipv6,

2040

socketfd = socketfd)

1813

use_ipv6 = use_ipv6)

2041

1814

def server_activate(self):

2042

1815

if self.enabled:

2043

1816

return socketserver.TCPServer.server_activate(self)

2056

1829

2057

1830

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

2058

1831

proc = None, client_object=None):

1832

condition_names = {

1833

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

1834

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

1835

# blocking).

1836

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

1837

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

1838

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

1839

# broken, usually for pipes and

1840

# sockets).

1841

}

1842

conditions_string = ' | '.join(name

1843

for cond, name in

1844

condition_names.iteritems()

1845

if cond & condition)

2059

1846

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

2060

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

1847

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

2061

1848

# Wait for other process to exit

2062

1849

proc.join()

2063

1850

return False

2121

1908

return True

2122

1909

2123

1910

2124

def rfc3339_duration_to_delta(duration):

2125

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

2126

2127

>>> rfc3339_duration_to_delta("P7D")

2128

datetime.timedelta(7)

2129

>>> rfc3339_duration_to_delta("PT60S")

2130

datetime.timedelta(0, 60)

2131

>>> rfc3339_duration_to_delta("PT60M")

2132

datetime.timedelta(0, 3600)

2133

>>> rfc3339_duration_to_delta("PT24H")

2134

datetime.timedelta(1)

2135

>>> rfc3339_duration_to_delta("P1W")

2136

datetime.timedelta(7)

2137

>>> rfc3339_duration_to_delta("PT5M30S")

2138

datetime.timedelta(0, 330)

2139

>>> rfc3339_duration_to_delta("P1DT3M20S")

2140

datetime.timedelta(1, 200)

2141

"""

2142

2143

# Parsing an RFC 3339 duration with regular expressions is not

2144

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

2145

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

2146

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

2147

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

2148

# avoid excessive use of external libraries.

2149

2150

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

2151

Token = collections.namedtuple("Token",

2152

("regexp", # To match token; if

2153

# "value" is not None,

2154

# must have a "group"

2155

# containing digits

2156

"value", # datetime.timedelta or

2157

# None

2158

"followers")) # Tokens valid after

2159

# this token

2160

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

2161

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

2162

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

2163

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

2164

datetime.timedelta(seconds=1),

2165

frozenset((token_end,)))

2166

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

2167

datetime.timedelta(minutes=1),

2168

frozenset((token_second, token_end)))

2169

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

2170

datetime.timedelta(hours=1),

2171

frozenset((token_minute, token_end)))

2172

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

2173

None,

2174

frozenset((token_hour, token_minute,

2175

token_second)))

2176

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

2177

datetime.timedelta(days=1),

2178

frozenset((token_time, token_end)))

2179

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

2180

datetime.timedelta(weeks=4),

2181

frozenset((token_day, token_end)))

2182

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

2183

datetime.timedelta(weeks=52),

2184

frozenset((token_month, token_end)))

2185

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

2186

datetime.timedelta(weeks=1),

2187

frozenset((token_end,)))

2188

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

2189

frozenset((token_year, token_month,

2190

token_day, token_time,

2191

token_week))),

2192

# Define starting values

2193

value = datetime.timedelta() # Value so far

2194

found_token = None

2195

followers = frozenset(token_duration,) # Following valid tokens

2196

s = duration # String left to parse

2197

# Loop until end token is found

2198

while found_token is not token_end:

2199

# Search for any currently valid tokens

2200

for token in followers:

2201

match = token.regexp.match(s)

2202

if match is not None:

2203

# Token found

2204

if token.value is not None:

2205

# Value found, parse digits

2206

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

2207

# Add to value so far

2208

value += factor * token.value

2209

# Strip token from string

2210

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

2211

# Go to found token

2212

found_token = token

2213

# Set valid next tokens

2214

followers = found_token.followers

2215

break

2216

else:

2217

# No currently valid tokens were found

2218

raise ValueError("Invalid RFC 3339 duration")

2219

# End token found

2220

return value

2221

2222

2223

1911

def string_to_delta(interval):

2224

1912

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

2225

1913

2236

1924

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

2237

1925

datetime.timedelta(0, 330)

2238

1926

"""

2239

2240

try:

2241

return rfc3339_duration_to_delta(interval)

2242

except ValueError:

2243

pass

2244

2245

1927

timevalue = datetime.timedelta(0)

2246

1928

for s in interval.split():

2247

1929

try:

2258

1940

elif suffix == "w":

2259

1941

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

2260

1942

else:

2261

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

2262

.format(suffix))

2263

except IndexError as e:

1943

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

1944

except (ValueError, IndexError) as e:

2264

1945

raise ValueError(*(e.args))

2265

1946

timevalue += delta

2266

1947

return timevalue

2279

1960

sys.exit()

2280

1961

if not noclose:

2281

1962

# Close all standard open file descriptors

2282

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

1963

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

2283

1964

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

2284

1965

raise OSError(errno.ENODEV,

2285

"{0} not a character device"

2286

.format(os.devnull))

1966

"%s not a character device"

1967

% os.path.devnull)

2287

1968

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

2288

1969

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

2289

1970

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

2298

1979

2299

1980

parser = argparse.ArgumentParser()

2300

1981

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

2301

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

1982

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

2302

1983

help="show version number and exit")

2303

1984

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

2304

1985

help="Bind to interface IF")

2310

1991

help="Run self-test")

2311

1992

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

2312

1993

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

2313

" to terminal", default=None)

1994

" to terminal")

2314

1995

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

2315

1996

help="Debug level for stdout output")

2316

1997

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

2323

2004

" files")

2324

2005

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

2325

2006

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

2326

" system bus interface", default=None)

2007

" system bus interface")

2327

2008

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

2328

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

2329

default=None)

2009

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

2330

2010

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

2331

2011

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

2332

" state", default=None)

2333

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

2334

help="Specify a file descriptor to a network"

2335

" socket to use instead of creating one")

2012

" state")

2336

2013

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

2337

2014

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

2338

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

2339

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

2340

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

2341

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

2342

default=None)

2343

2015

2344

2016

options = parser.parse_args()

2345

2017

2346

2018

if options.check:

2347

2019

import doctest

2348

fail_count, test_count = doctest.testmod()

2349

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

2020

doctest.testmod()

2021

sys.exit()

2350

2022

2351

2023

# Default values for config file for server-global settings

2352

2024

server_defaults = { "interface": "",

2354

2026

"port": "",

2355

2027

"debug": "False",

2356

2028

"priority":

2357

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

2029

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

2358

2030

"servicename": "Mandos",

2359

2031

"use_dbus": "True",

2360

2032

"use_ipv6": "True",

2361

2033

"debuglevel": "",

2362

2034

"restore": "True",

2363

"socket": "",

2364

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

2365

"foreground": "False",

2366

"zeroconf": "True",

2035

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

2367

2036

}

2368

2037

2369

2038

# Parse config file for server-global settings

2374

2043

# Convert the SafeConfigParser object to a dict

2375

2044

server_settings = server_config.defaults()

2376

2045

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

2377

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

2046

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

2378

2047

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

2379

2048

option)

2380

2049

if server_settings["port"]:

2381

2050

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

2382

2051

"port")

2383

if server_settings["socket"]:

2384

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

2385

"socket")

2386

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

2387

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

2388

# happen with a supplied network socket.

2389

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

2390

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

2391

["socket"])

2392

2052

del server_config

2393

2053

2394

2054

# Override the settings from the config file with command line

2396

2056

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

2397

2057

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

2398

2058

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

2399

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

2059

"statedir"):

2400

2060

value = getattr(options, option)

2401

2061

if value is not None:

2402

2062

server_settings[option] = value

2405

2065

for option in server_settings.keys():

2406

2066

if type(server_settings[option]) is str:

2407

2067

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

2408

# Force all boolean options to be boolean

2409

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

2410

"foreground", "zeroconf"):

2411

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

2412

# Debug implies foreground

2413

if server_settings["debug"]:

2414

server_settings["foreground"] = True

2415

2068

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

2416

2069

2417

2070

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

2418

2071

2419

if (not server_settings["zeroconf"] and

2420

not (server_settings["port"]

2421

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

2422

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

2423

" Zeroconf")

2424

2425

2072

# For convenience

2426

2073

debug = server_settings["debug"]

2427

2074

debuglevel = server_settings["debuglevel"]

2429

2076

use_ipv6 = server_settings["use_ipv6"]

2430

2077

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

2431

2078

stored_state_file)

2432

foreground = server_settings["foreground"]

2433

zeroconf = server_settings["zeroconf"]

2434

2079

2435

2080

if debug:

2436

initlogger(debug, logging.DEBUG)

2081

initlogger(logging.DEBUG)

2437

2082

else:

2438

2083

if not debuglevel:

2439

initlogger(debug)

2084

initlogger()

2440

2085

else:

2441

2086

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

2442

initlogger(debug, level)

2087

initlogger(level)

2443

2088

2444

2089

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

2445

2090

syslogger.setFormatter(logging.Formatter

2446

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

2447

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

2448

.format(server_settings

2449

["servicename"])))

2091

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

2092

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

2093

% server_settings["servicename"]))

2450

2094

2451

2095

# Parse config file with clients

2452

client_config = configparser.SafeConfigParser(Client

2453

.client_defaults)

2096

client_config = configparser.SafeConfigParser(Client.client_defaults)

2454

2097

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

2455

2098

"clients.conf"))

2456

2099

2457

2100

global mandos_dbus_service

2458

2101

mandos_dbus_service = None

2459

2102

2460

socketfd = None

2461

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

2462

socketfd = server_settings["socket"]

2463

2103

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

2464

2104

server_settings["port"]),

2465

2105

ClientHandler,

2468

2108

use_ipv6=use_ipv6,

2469

2109

gnutls_priority=

2470

2110

server_settings["priority"],

2471

use_dbus=use_dbus,

2472

socketfd=socketfd)

2473

if not foreground:

2474

pidfilename = "/run/mandos.pid"

2475

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

2476

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

2477

pidfile = None

2111

use_dbus=use_dbus)

2112

if not debug:

2113

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

2478

2114

try:

2479

2115

pidfile = open(pidfilename, "w")

2480

except IOError as e:

2481

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

2482

exc_info=e)

2116

except IOError:

2117

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

2483

2118

2484

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

2119

try:

2120

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

2121

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

2122

except KeyError:

2485

2123

try:

2486

uid = pwd.getpwnam(name).pw_uid

2487

gid = pwd.getpwnam(name).pw_gid

2488

break

2124

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

2125

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

2489

2126

except KeyError:

2490

continue

2491

else:

2492

uid = 65534

2493

gid = 65534

2127

try:

2128

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

2129

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

2130

except KeyError:

2131

uid = 65534

2132

gid = 65534

2494

2133

try:

2495

2134

os.setgid(gid)

2496

2135

os.setuid(uid)

2497

2136

except OSError as error:

2498

if error.errno != errno.EPERM:

2499

raise

2137

if error[0] != errno.EPERM:

2138

raise error

2500

2139

2501

2140

if debug:

2502

2141

# Enable all possible GnuTLS debugging

2513

2152

.gnutls_global_set_log_function(debug_gnutls))

2514

2153

2515

2154

# Redirect stdin so all checkers get /dev/null

2516

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

2155

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

2517

2156

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

2518

2157

if null > 2:

2519

2158

os.close(null)

2159

else:

2160

# No console logging

2161

logger.removeHandler(console)

2520

2162

2521

2163

# Need to fork before connecting to D-Bus

2522

if not foreground:

2164

if not debug:

2523

2165

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

2524

2166

daemon()

2525

2167

2526

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

2527

# need to inform gobject that threads will be used.

2528

2168

gobject.threads_init()

2529

2169

2530

2170

global main_loop

2531

2171

# From the Avahi example code

2532

DBusGMainLoop(set_as_default=True)

2172

DBusGMainLoop(set_as_default=True )

2533

2173

main_loop = gobject.MainLoop()

2534

2174

bus = dbus.SystemBus()

2535

2175

# End of Avahi example code

2541

2181

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

2542

2182

do_not_queue=True))

2543

2183

except dbus.exceptions.NameExistsException as e:

2544

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

2184

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

2545

2185

use_dbus = False

2546

2186

server_settings["use_dbus"] = False

2547

2187

tcp_server.use_dbus = False

2548

if zeroconf:

2549

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2550

service = AvahiServiceToSyslog(name =

2551

server_settings["servicename"],

2552

servicetype = "_mandos._tcp",

2553

protocol = protocol, bus = bus)

2554

if server_settings["interface"]:

2555

service.interface = (if_nametoindex

2556

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

2188

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2189

service = AvahiServiceToSyslog(name =

2190

server_settings["servicename"],

2191

servicetype = "_mandos._tcp",

2192

protocol = protocol, bus = bus)

2193

if server_settings["interface"]:

2194

service.interface = (if_nametoindex

2195

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

2557

2196

2558

2197

global multiprocessing_manager

2559

2198

multiprocessing_manager = multiprocessing.Manager()

2560

2199

2561

2200

client_class = Client

2562

2201

if use_dbus:

2563

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

2202

client_class = functools.partial(ClientDBusTransitional,

2203

bus = bus)

2564

2204

2565

2205

client_settings = Client.config_parser(client_config)

2566

2206

old_client_settings = {}

2567

2207

clients_data = {}

2568

2208

2569

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

2570

global wnull

2571

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

2572

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

2573

# mode

2574

if debug or not foreground:

2575

wnull.close()

2576

2577

2209

# Get client data and settings from last running state.

2578

2210

if server_settings["restore"]:

2579

2211

try:

2582

2214

(stored_state))

2583

2215

os.remove(stored_state_path)

2584

2216

except IOError as e:

2585

if e.errno == errno.ENOENT:

2586

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

2587

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

2588

else:

2589

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

2590

exc_info=e)

2217

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

2218

.format(e))

2219

if e.errno != errno.ENOENT:

2591

2220

raise

2592

except EOFError as e:

2593

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

2594

"EOFError:", exc_info=e)

2595

2221

2596

2222

with PGPEngine() as pgp:

2597

2223

for client_name, client in clients_data.iteritems():

2598

# Skip removed clients

2599

if client_name not in client_settings:

2600

continue

2601

2602

2224

# Decide which value to use after restoring saved state.

2603

2225

# We have three different values: Old config file,

2604

2226

# new config file, and saved state.

2618

2240

2619

2241

# Clients who has passed its expire date can still be

2620

2242

# enabled if its last checker was successful. Clients

2621

# whose checker succeeded before we stored its state is

2622

# assumed to have successfully run all checkers during

2623

# downtime.

2243

# whose checker failed before we stored its state is

2244

# assumed to have failed all checkers during downtime.

2624

2245

if client["enabled"]:

2625

2246

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

2626

2247

if not client["last_checked_ok"]:

2627

2248

logger.warning(

2628

2249

"disabling client {0} - Client never "

2629

"performed a successful checker"

2630

.format(client_name))

2250

"performed a successfull checker"

2251

.format(client["name"]))

2631

2252

client["enabled"] = False

2632

2253

elif client["last_checker_status"] != 0:

2633

2254

logger.warning(

2634

2255

"disabling client {0} - Client "

2635

2256

"last checker failed with error code {1}"

2636

.format(client_name,

2257

.format(client["name"],

2637

2258

client["last_checker_status"]))

2638

2259

client["enabled"] = False

2639

2260

else:

2640

2261

client["expires"] = (datetime.datetime

2641

2262

.utcnow()

2642

2263

+ client["timeout"])

2643

logger.debug("Last checker succeeded,"

2644

" keeping {0} enabled"

2645

.format(client_name))

2264

2646

2265

try:

2647

2266

client["secret"] = (

2648

2267

pgp.decrypt(client["encrypted_secret"],

2654

2273

.format(client_name))

2655

2274

client["secret"] = (

2656

2275

client_settings[client_name]["secret"])

2276

2657

2277

2658

2278

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

2659

for client_name in (set(old_client_settings)

2660

- set(client_settings)):

2279

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

2661

2280

del clients_data[client_name]

2662

for client_name in (set(client_settings)

2663

- set(old_client_settings)):

2281

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

2664

2282

clients_data[client_name] = client_settings[client_name]

2665

2666

# Create all client objects

2283

2284

# Create clients all clients

2667

2285

for client_name, client in clients_data.iteritems():

2668

2286

tcp_server.clients[client_name] = client_class(

2669

name = client_name, settings = client,

2670

server_settings = server_settings)

2287

name = client_name, settings = client)

2671

2288

2672

2289

if not tcp_server.clients:

2673

2290

logger.warning("No clients defined")

2674

2675

if not foreground:

2676

if pidfile is not None:

2677

try:

2678

with pidfile:

2679

pid = os.getpid()

2680

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

2681

except IOError:

2682

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

2683

pidfilename, pid)

2684

del pidfile

2291

2292

if not debug:

2293

try:

2294

with pidfile:

2295

pid = os.getpid()

2296

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

2297

del pidfile

2298

except IOError:

2299

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

2300

pidfilename, pid)

2301

except NameError:

2302

# "pidfile" was never created

2303

pass

2685

2304

del pidfilename

2305

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

2686

2306

2687

2307

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

2688

2308

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

2689

2309

2690

2310

if use_dbus:

2691

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

2692

"se.bsnet.fukt.Mandos"})

2693

class MandosDBusService(DBusObjectWithProperties):

2311

class MandosDBusService(dbus.service.Object):

2694

2312

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

2695

2313

def __init__(self):

2696

2314

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

2697

2315

_interface = "se.recompile.Mandos"

2698

2316

2699

@dbus_interface_annotations(_interface)

2700

def _foo(self):

2701

return { "org.freedesktop.DBus.Property"

2702

".EmitsChangedSignal":

2703

"false"}

2704

2705

2317

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

2706

2318

def ClientAdded(self, objpath):

2707

2319

"D-Bus signal"

2749

2361

2750

2362

del _interface

2751

2363

2752

mandos_dbus_service = MandosDBusService()

2364

class MandosDBusServiceTransitional(MandosDBusService):

2365

__metaclass__ = AlternateDBusNamesMetaclass

2366

mandos_dbus_service = MandosDBusServiceTransitional()

2753

2367

2754

2368

def cleanup():

2755

2369

"Cleanup function; run on exit"

2756

if zeroconf:

2757

service.cleanup()

2370

service.cleanup()

2758

2371

2759

2372

multiprocessing.active_children()

2760

wnull.close()

2761

2373

if not (tcp_server.clients or client_settings):

2762

2374

return

2763

2375

2775

2387

# A list of attributes that can not be pickled

2776

2388

# + secret.

2777

2389

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

2778

"checker", "server_settings"))

2390

"checker"))

2779

2391

for name, typ in (inspect.getmembers

2780

2392

(dbus.service.Object)):

2781

2393

exclude.add(name)

2790

2402

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

2791

2403

2792

2404

try:

2793

with (tempfile.NamedTemporaryFile

2794

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

2795

dir=os.path.dirname(stored_state_path),

2796

delete=False)) as stored_state:

2405

with os.fdopen(os.open(stored_state_path,

2406

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

2407

0600), "wb") as stored_state:

2797

2408

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

2798

tempname=stored_state.name

2799

os.rename(tempname, stored_state_path)

2800

2409

except (IOError, OSError) as e:

2801

if not debug:

2802

try:

2803

os.remove(tempname)

2804

except NameError:

2805

pass

2806

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

2807

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

2808

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

2809

else:

2810

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

2811

exc_info=e)

2410

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

2411

.format(e))

2412

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

2812

2413

raise

2813

2414

2814

2415

# Delete all clients, and settings from config

2839

2440

tcp_server.server_activate()

2840

2441

2841

2442

# Find out what port we got

2842

if zeroconf:

2843

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

2443

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

2844

2444

if use_ipv6:

2845

2445

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

2846

" flowinfo %d, scope_id %d",

2847

*tcp_server.socket.getsockname())

2446

" flowinfo %d, scope_id %d"

2447

% tcp_server.socket.getsockname())

2848

2448

else: # IPv4

2849

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

2850

*tcp_server.socket.getsockname())

2449

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

2450

% tcp_server.socket.getsockname())

2851

2451

2852

2452

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

2853

2453

2854

2454

try:

2855

if zeroconf:

2856

# From the Avahi example code

2857

try:

2858

service.activate()

2859

except dbus.exceptions.DBusException as error:

2860

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

2861

cleanup()

2862

sys.exit(1)

2863

# End of Avahi example code

2455

# From the Avahi example code

2456

try:

2457

service.activate()

2458

except dbus.exceptions.DBusException as error:

2459

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

2460

cleanup()

2461

sys.exit(1)

2462

# End of Avahi example code

2864

2463

2865

2464

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

2866

2465

lambda *args, **kwargs:

2870

2469

logger.debug("Starting main loop")

2871

2470

main_loop.run()

2872

2471

except AvahiError as error:

2873

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

2472

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

2874

2473

cleanup()

2875

2474

sys.exit(1)

2876

2475

except KeyboardInterrupt: