/mandos/trunk : revision 237.4.36

11

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

12

#

13

# Everything else is

14

15

14

15

16

#

17

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

18

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

34

from __future__ import (division, absolute_import, print_function,

35

unicode_literals)

36

37

from future_builtins import *

38

37

39

import SocketServer as socketserver

38

40

import socket

39

41

import argparse

65

67

import types

66

68

import binascii

67

69

import tempfile

70

import itertools

71

import collections

68

72

69

73

import dbus

70

74

import dbus.service

75

79

import ctypes.util

76

80

import xml.dom.minidom

77

81

import inspect

78

import GnuPGInterface

79

82

80

83

try:

81

84

SO_BINDTODEVICE = socket.SO_BINDTODEVICE

85

88

except ImportError:

86

89

SO_BINDTODEVICE = None

87

90

88

89

version = "1.4.1"

91

version = "1.6.1"

90

92

stored_state_file = "clients.pickle"

91

93

92

94

logger = logging.getLogger()

111

113

return interface_index

112

114

113

115

114

def initlogger(level=logging.WARNING):

116

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

115

117

"""init logger and add loglevel"""

116

118

117

119

syslogger.setFormatter(logging.Formatter

119

121

' %(message)s'))

120

122

logger.addHandler(syslogger)

121

123

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)

124

if debug:

125

console = logging.StreamHandler()

126

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

127

' [%(process)d]:'

128

' %(levelname)s:'

129

' %(message)s'))

130

logger.addHandler(console)

128

131

logger.setLevel(level)

129

132

130

133

136

139

class PGPEngine(object):

137

140

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

138

141

def __init__(self):

139

self.gnupg = GnuPGInterface.GnuPG()

140

142

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

141

self.gnupg = GnuPGInterface.GnuPG()

142

self.gnupg.options.meta_interactive = False

143

self.gnupg.options.homedir = self.tempdir

144

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

145

'--quiet'])

143

self.gnupgargs = ['--batch',

144

'--home', self.tempdir,

145

'--force-mdc',

146

'--quiet',

147

'--no-use-agent']

146

148

147

149

def __enter__(self):

148

150

return self

149

151

150

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

152

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

151

153

self._cleanup()

152

154

return False

153

155

170

172

def password_encode(self, password):

171

173

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

172

174

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

173

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

175

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

176

if len(encoded) > 2048:

177

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

178

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

179

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

180

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

181

return encoded

174

182

175

183

def encrypt(self, data, password):

176

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

177

with open(os.devnull) as devnull:

178

try:

179

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

180

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

181

attach_fhs={'stderr': devnull})

182

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

183

f.write(data)

184

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

185

ciphertext = f.read()

186

proc.wait()

187

except IOError as e:

188

raise PGPError(e)

189

self.gnupg.passphrase = None

184

passphrase = self.password_encode(password)

185

with tempfile.NamedTemporaryFile(dir=self.tempdir

186

) as passfile:

187

passfile.write(passphrase)

188

passfile.flush()

189

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

190

'--passphrase-file',

191

passfile.name]

192

+ self.gnupgargs,

193

stdin = subprocess.PIPE,

194

stdout = subprocess.PIPE,

195

stderr = subprocess.PIPE)

196

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

197

if proc.returncode != 0:

198

raise PGPError(err)

190

199

return ciphertext

191

200

192

201

def decrypt(self, data, password):

193

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

194

with open(os.devnull) as devnull:

195

try:

196

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

197

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

198

attach_fhs={'stderr': devnull})

199

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

200

f.write(data)

201

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

202

decrypted_plaintext = f.read()

203

proc.wait()

204

except IOError as e:

205

raise PGPError(e)

206

self.gnupg.passphrase = None

202

passphrase = self.password_encode(password)

203

with tempfile.NamedTemporaryFile(dir = self.tempdir

204

) as passfile:

205

passfile.write(passphrase)

206

passfile.flush()

207

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

208

'--passphrase-file',

209

passfile.name]

210

+ self.gnupgargs,

211

stdin = subprocess.PIPE,

212

stdout = subprocess.PIPE,

213

stderr = subprocess.PIPE)

214

decrypted_plaintext, err = proc.communicate(input

215

= data)

216

if proc.returncode != 0:

217

raise PGPError(err)

207

218

return decrypted_plaintext

208

219

209

220

210

211

221

class AvahiError(Exception):

212

222

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

213

223

self.value = value

230

240

Used to optionally bind to the specified interface.

231

241

name: string; Example: 'Mandos'

232

242

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

233

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

243

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

234

244

port: integer; what port to announce

235

245

TXT: list of strings; TXT record for the service

236

246

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

242

252

server: D-Bus Server

243

253

bus: dbus.SystemBus()

244

254

"""

255

245

256

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

246

257

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

247

258

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

260

271

self.server = None

261

272

self.bus = bus

262

273

self.entry_group_state_changed_match = None

274

263

275

def rename(self):

264

276

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

265

277

if self.rename_count >= self.max_renames:

275

287

try:

276

288

self.add()

277

289

except dbus.exceptions.DBusException as error:

278

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

290

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

279

291

self.cleanup()

280

292

os._exit(1)

281

293

self.rename_count += 1

294

282

295

def remove(self):

283

296

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

284

297

if self.entry_group_state_changed_match is not None:

286

299

self.entry_group_state_changed_match = None

287

300

if self.group is not None:

288

301

self.group.Reset()

302

289

303

def add(self):

290

304

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

291

305

self.remove()

308

322

dbus.UInt16(self.port),

309

323

avahi.string_array_to_txt_array(self.TXT))

310

324

self.group.Commit()

325

311

326

def entry_group_state_changed(self, state, error):

312

327

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

313

328

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

320

335

elif state == avahi.ENTRY_GROUP_FAILURE:

321

336

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

322

337

unicode(error))

323

raise AvahiGroupError("State changed: %s"

324

% unicode(error))

338

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

339

.format(error))

340

325

341

def cleanup(self):

326

342

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

327

343

if self.group is not None:

332

348

pass

333

349

self.group = None

334

350

self.remove()

351

335

352

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

336

353

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

337

354

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

356

373

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

357

374

else:

358

375

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

376

359

377

def activate(self):

360

378

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

361

379

if self.server is None:

368

386

self.server_state_changed)

369

387

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

370

388

389

371

390

class AvahiServiceToSyslog(AvahiService):

372

391

def rename(self):

373

392

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

374

393

ret = AvahiService.rename(self)

375

394

syslogger.setFormatter(logging.Formatter

376

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

377

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

378

% self.name))

395

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

396

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

397

.format(self.name)))

379

398

return ret

380

399

400

381

401

def timedelta_to_milliseconds(td):

382

402

"Convert a datetime.timedelta() to milliseconds"

383

403

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

384

404

+ (td.seconds * 1000)

385

405

+ (td.microseconds // 1000))

386

406

407

387

408

class Client(object):

388

409

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

389

410

412

433

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

413

434

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

414

435

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

415

416

436

last_checker_status: integer between 0 and 255 reflecting exit

417

437

status of last checker. -1 reflects crashed

418

checker, or None.

438

checker, -2 means no checker completed yet.

419

439

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

420

440

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

421

441

D-Bus identifiers

422

442

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

423

443

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

424

444

until this client is disabled

425

extended_timeout: extra long timeout when password has been sent

445

extended_timeout: extra long timeout when secret has been sent

426

446

runtime_expansions: Allowed attributes for runtime expansion.

427

447

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

428

448

disabled, or None

449

server_settings: The server_settings dict from main()

429

450

"""

430

451

431

452

runtime_expansions = ("approval_delay", "approval_duration",

432

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

433

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

453

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

454

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

455

"last_approval_request", "last_checked_ok",

434

456

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

457

client_defaults = { "timeout": "PT5M",

458

"extended_timeout": "PT15M",

459

"interval": "PT2M",

460

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

461

"host": "",

462

"approval_delay": "PT0S",

463

"approval_duration": "PT1S",

464

"approved_by_default": "True",

465

"enabled": "True",

466

}

435

467

436

468

def timeout_milliseconds(self):

437

469

"Return the 'timeout' attribute in milliseconds"

448

480

def approval_delay_milliseconds(self):

449

481

return timedelta_to_milliseconds(self.approval_delay)

450

482

451

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

452

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

453

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

454

attribute."""

483

@staticmethod

484

def config_parser(config):

485

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

486

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

487

with exceptions for any special settings as defined above.

488

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

489

value given the same arguments.

490

"""

491

settings = {}

492

for client_name in config.sections():

493

section = dict(config.items(client_name))

494

client = settings[client_name] = {}

495

496

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

497

# Reformat values from string types to Python types

498

client["approved_by_default"] = config.getboolean(

499

client_name, "approved_by_default")

500

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

501

"enabled")

502

503

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

504

.replace(" ", ""))

505

if "secret" in section:

506

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

507

elif "secfile" in section:

508

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

509

(section["secfile"])),

510

"rb") as secfile:

511

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

512

else:

513

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

514

.format(section))

515

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

516

client["extended_timeout"] = string_to_delta(

517

section["extended_timeout"])

518

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

519

client["approval_delay"] = string_to_delta(

520

section["approval_delay"])

521

client["approval_duration"] = string_to_delta(

522

section["approval_duration"])

523

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

524

client["last_approval_request"] = None

525

client["last_checked_ok"] = None

526

client["last_checker_status"] = -2

527

528

return settings

529

530

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

455

531

self.name = name

456

if config is None:

457

config = {}

532

if server_settings is None:

533

server_settings = {}

534

self.server_settings = server_settings

535

# adding all client settings

536

for setting, value in settings.iteritems():

537

setattr(self, setting, value)

538

539

if self.enabled:

540

if not hasattr(self, "last_enabled"):

541

self.last_enabled = datetime.datetime.utcnow()

542

if not hasattr(self, "expires"):

543

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

544

+ self.timeout)

545

else:

546

self.last_enabled = None

547

self.expires = None

548

458

549

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

459

550

# Uppercase and remove spaces from fingerprint for later

460

551

# comparison purposes with return value from the fingerprint()

461

552

# function

462

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

463

.replace(" ", ""))

464

553

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

465

if "secret" in config:

466

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

467

elif "secfile" in config:

468

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

469

(config["secfile"])),

470

"rb") as secfile:

471

self.secret = secfile.read()

472

else:

473

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

474

% self.name)

475

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

476

self.created = datetime.datetime.utcnow()

477

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

478

self.last_approval_request = None

479

if self.enabled:

480

self.last_enabled = datetime.datetime.utcnow()

481

else:

482

self.last_enabled = None

483

self.last_checked_ok = None

484

self.last_checker_status = None

485

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

486

self.extended_timeout = string_to_delta(config

487

["extended_timeout"])

488

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

554

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

555

datetime.datetime.utcnow())

556

557

# attributes specific for this server instance

489

558

self.checker = None

490

559

self.checker_initiator_tag = None

491

560

self.disable_initiator_tag = None

492

if self.enabled:

493

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

494

else:

495

self.expires = None

496

561

self.checker_callback_tag = None

497

self.checker_command = config["checker"]

498

562

self.current_checker_command = None

499

563

self.approved = None

500

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

501

True)

502

564

self.approvals_pending = 0

503

self.approval_delay = string_to_delta(

504

config["approval_delay"])

505

self.approval_duration = string_to_delta(

506

config["approval_duration"])

507

565

self.changedstate = (multiprocessing_manager

508

566

.Condition(multiprocessing_manager

509

567

.Lock()))

529

587

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

530

588

# Already enabled

531

589

return

532

self.send_changedstate()

533

590

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

534

591

self.enabled = True

535

592

self.last_enabled = datetime.datetime.utcnow()

536

593

self.init_checker()

594

self.send_changedstate()

537

595

538

596

def disable(self, quiet=True):

539

597

"""Disable this client."""

540

598

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

541

599

return False

542

600

if not quiet:

543

self.send_changedstate()

544

if not quiet:

545

601

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

546

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

602

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

547

603

gobject.source_remove(self.disable_initiator_tag)

548

604

self.disable_initiator_tag = None

549

605

self.expires = None

550

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

606

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

551

607

gobject.source_remove(self.checker_initiator_tag)

552

608

self.checker_initiator_tag = None

553

609

self.stop_checker()

554

610

self.enabled = False

611

if not quiet:

612

self.send_changedstate()

555

613

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

556

614

return False

557

615

561

619

def init_checker(self):

562

620

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

563

621

# and every interval from then on.

622

if self.checker_initiator_tag is not None:

623

gobject.source_remove(self.checker_initiator_tag)

564

624

self.checker_initiator_tag = (gobject.timeout_add

565

625

(self.interval_milliseconds(),

566

626

self.start_checker))

567

627

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

628

if self.disable_initiator_tag is not None:

629

gobject.source_remove(self.disable_initiator_tag)

568

630

self.disable_initiator_tag = (gobject.timeout_add

569

631

(self.timeout_milliseconds(),

570

632

self.disable))

589

651

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

590

652

vars(self))

591

653

592

def checked_ok(self, timeout=None):

593

"""Bump up the timeout for this client.

594

595

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

596

alive and well.

597

"""

654

def checked_ok(self):

655

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

656

self.last_checked_ok = datetime.datetime.utcnow()

657

self.last_checker_status = 0

658

self.bump_timeout()

659

660

def bump_timeout(self, timeout=None):

661

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

598

662

if timeout is None:

599

663

timeout = self.timeout

600

self.last_checked_ok = datetime.datetime.utcnow()

601

664

if self.disable_initiator_tag is not None:

602

665

gobject.source_remove(self.disable_initiator_tag)

666

self.disable_initiator_tag = None

603

667

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

604

668

self.disable_initiator_tag = (gobject.timeout_add

605

669

(timedelta_to_milliseconds

615

679

If a checker already exists, leave it running and do

616

680

nothing."""

617

681

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

618

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

619

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

620

# client would inevitably timeout, since no checker would get

621

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

682

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

683

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

684

# would inevitably timeout, since no checker would get a

685

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

622

686

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

623

687

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

624

688

# should be.

638

702

self.current_checker_command)

639

703

# Start a new checker if needed

640

704

if self.checker is None:

705

# Escape attributes for the shell

706

escaped_attrs = dict(

707

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

708

for attr in

709

self.runtime_expansions)

641

710

try:

642

# In case checker_command has exactly one % operator

643

command = self.checker_command % self.host

644

except TypeError:

645

# Escape attributes for the shell

646

escaped_attrs = dict(

647

(attr,

648

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

649

errors=

650

'replace')))

651

for attr in

652

self.runtime_expansions)

653

654

try:

655

command = self.checker_command % escaped_attrs

656

except TypeError as error:

657

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

658

' %s', self.checker_command, error)

659

return True # Try again later

711

command = self.checker_command % escaped_attrs

712

except TypeError as error:

713

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

714

self.checker_command, exc_info=error)

715

return True # Try again later

660

716

self.current_checker_command = command

661

717

try:

662

718

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

665

721

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

666

722

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

667

723

# always replaced by /dev/null.)

724

# The exception is when not debugging but nevertheless

725

# running in the foreground; use the previously

726

# created wnull.

727

popen_args = {}

728

if (not self.server_settings["debug"]

729

and self.server_settings["foreground"]):

730

popen_args.update({"stdout": wnull,

731

"stderr": wnull })

668

732

self.checker = subprocess.Popen(command,

669

733

close_fds=True,

670

shell=True, cwd="/")

671

self.checker_callback_tag = (gobject.child_watch_add

672

(self.checker.pid,

673

self.checker_callback,

674

data=command))

675

# The checker may have completed before the gobject

676

# watch was added. Check for this.

734

shell=True, cwd="/",

735

**popen_args)

736

except OSError as error:

737

logger.error("Failed to start subprocess",

738

exc_info=error)

739

return True

740

self.checker_callback_tag = (gobject.child_watch_add

741

(self.checker.pid,

742

self.checker_callback,

743

data=command))

744

# The checker may have completed before the gobject

745

# watch was added. Check for this.

746

try:

677

747

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

678

if pid:

679

gobject.source_remove(self.checker_callback_tag)

680

self.checker_callback(pid, status, command)

681

748

except OSError as error:

682

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

683

error)

749

if error.errno == errno.ECHILD:

750

# This should never happen

751

logger.error("Child process vanished",

752

exc_info=error)

753

return True

754

raise

755

if pid:

756

gobject.source_remove(self.checker_callback_tag)

757

self.checker_callback(pid, status, command)

684

758

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

685

759

return True

686

760

693

767

return

694

768

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

695

769

try:

696

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

770

self.checker.terminate()

697

771

#time.sleep(0.5)

698

772

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

699

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

773

# self.checker.kill()

700

774

except OSError as error:

701

775

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

702

776

raise

719

793

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

720

794

if byte_arrays and signature != "ay":

721

795

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

722

" signature %r" % signature)

796

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

723

797

def decorator(func):

724

798

func._dbus_is_property = True

725

799

func._dbus_interface = dbus_interface

733

807

return decorator

734

808

735

809

810

def dbus_interface_annotations(dbus_interface):

811

"""Decorator for marking functions returning interface annotations

812

813

Usage:

814

815

@dbus_interface_annotations("org.example.Interface")

816

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

817

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

818

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

819

"false"}

820

"""

821

def decorator(func):

822

func._dbus_is_interface = True

823

func._dbus_interface = dbus_interface

824

func._dbus_name = dbus_interface

825

return func

826

return decorator

827

828

829

def dbus_annotations(annotations):

830

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

831

Usage:

832

833

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

834

access="r")

835

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

836

"org.freedesktop.DBus.Property."

837

"EmitsChangedSignal": "false"})

838

def Property_dbus_property(self):

839

return dbus.Boolean(False)

840

"""

841

def decorator(func):

842

func._dbus_annotations = annotations

843

return func

844

return decorator

845

846

736

847

class DBusPropertyException(dbus.exceptions.DBusException):

737

848

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

738

849

"""

761

872

"""

762

873

763

874

@staticmethod

764

def _is_dbus_property(obj):

765

return getattr(obj, "_dbus_is_property", False)

875

def _is_dbus_thing(thing):

876

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

877

878

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

879

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

880

"""

881

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

882

False)

766

883

767

def _get_all_dbus_properties(self):

884

def _get_all_dbus_things(self, thing):

768

885

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

769

886

"""

770

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

887

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

888

name),

889

athing.__get__(self))

771

890

for cls in self.__class__.__mro__

772

for name, prop in

773

inspect.getmembers(cls, self._is_dbus_property))

891

for name, athing in

892

inspect.getmembers(cls,

893

self._is_dbus_thing(thing)))

774

894

775

895

def _get_dbus_property(self, interface_name, property_name):

776

896

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

778

898

"""

779

899

for cls in self.__class__.__mro__:

780

900

for name, value in (inspect.getmembers

781

(cls, self._is_dbus_property)):

901

(cls,

902

self._is_dbus_thing("property"))):

782

903

if (value._dbus_name == property_name

783

904

and value._dbus_interface == interface_name):

784

905

return value.__get__(self)

813

934

# signatures other than "ay".

814

935

if prop._dbus_signature != "ay":

815

936

raise ValueError

816

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

817

for byte in value))

937

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

938

for byte in value))

818

939

prop(value)

819

940

820

941

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

826

947

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

827

948

"""

828

949

properties = {}

829

for name, prop in self._get_all_dbus_properties():

950

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

830

951

if (interface_name

831

952

and interface_name != prop._dbus_interface):

832

953

# Interface non-empty but did not match

847

968

path_keyword='object_path',

848

969

connection_keyword='connection')

849

970

def Introspect(self, object_path, connection):

850

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

971

"""Overloading of standard D-Bus method.

972

973

Inserts property tags and interface annotation tags.

851

974

"""

852

975

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

853

976

connection)

860

983

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

861

984

return e

862

985

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

986

# Add property tags

863

987

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

864

988

for name, prop

865

in self._get_all_dbus_properties()

989

in self._get_all_dbus_things("property")

866

990

if prop._dbus_interface

867

991

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

868

992

if_tag.appendChild(tag)

993

# Add annotation tags

994

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

995

for tag in if_tag.getElementsByTagName(typ):

996

annots = dict()

997

for name, prop in (self.

998

_get_all_dbus_things(typ)):

999

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

1000

and prop._dbus_interface

1001

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

1002

annots.update(getattr

1003

(prop,

1004

"_dbus_annotations",

1005

{}))

1006

for name, value in annots.iteritems():

1007

ann_tag = document.createElement(

1008

"annotation")

1009

ann_tag.setAttribute("name", name)

1010

ann_tag.setAttribute("value", value)

1011

tag.appendChild(ann_tag)

1012

# Add interface annotation tags

1013

for annotation, value in dict(

1014

itertools.chain.from_iterable(

1015

annotations().iteritems()

1016

for name, annotations in

1017

self._get_all_dbus_things("interface")

1018

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

1019

)).iteritems():

1020

ann_tag = document.createElement("annotation")

1021

ann_tag.setAttribute("name", annotation)

1022

ann_tag.setAttribute("value", value)

1023

if_tag.appendChild(ann_tag)

869

1024

# Add the names to the return values for the

870

1025

# "org.freedesktop.DBus.Properties" methods

871

1026

if (if_tag.getAttribute("name")

886

1041

except (AttributeError, xml.dom.DOMException,

887

1042

xml.parsers.expat.ExpatError) as error:

888

1043

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

889

error)

1044

exc_info=error)

890

1045

return xmlstring

891

1046

892

1047

893

def datetime_to_dbus (dt, variant_level=0):

1048

def datetime_to_dbus(dt, variant_level=0):

894

1049

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

895

1050

if dt is None:

896

1051

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

898

1053

variant_level=variant_level)

899

1054

900

1055

901

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

902

.__metaclass__):

903

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

904

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

1056

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1057

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

1058

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

1059

interface names according to the "alt_interface_names" mapping.

1060

Usage:

1061

1062

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

1063

"net.example.AlternateInterface"})

1064

class SampleDBusObject(dbus.service.Object):

1065

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

1066

def SampleDBusMethod():

1067

pass

1068

1069

The above "SampleDBusMethod" on "SampleDBusObject" will be

1070

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

1071

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

1072

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

1073

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

1074

1075

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

1076

(from DBusObjectWithProperties) and interfaces (from the

1077

dbus_interface_annotations decorator).

905

1078

"""

906

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

907

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

908

# methods, signals, or properties in them

909

for base in (b for b in bases

910

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

911

# Go though all attributes of the base class

912

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

1079

def wrapper(cls):

1080

for orig_interface_name, alt_interface_name in (

1081

alt_interface_names.iteritems()):

1082

attr = {}

1083

interface_names = set()

1084

# Go though all attributes of the class

1085

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

913

1086

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

914

1087

# with the wrong interface name

915

1088

if (not hasattr(attribute, "_dbus_interface")

916

1089

or not attribute._dbus_interface

917

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

1090

.startswith(orig_interface_name)):

918

1091

continue

919

1092

# Create an alternate D-Bus interface name based on

920

1093

# the current name

921

1094

alt_interface = (attribute._dbus_interface

922

.replace("se.recompile.Mandos",

923

"se.bsnet.fukt.Mandos"))

1095

.replace(orig_interface_name,

1096

alt_interface_name))

1097

interface_names.add(alt_interface)

924

1098

# Is this a D-Bus signal?

925

1099

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

926

# Extract the original non-method function by

927

# black magic

1100

# Extract the original non-method undecorated

1101

# function by black magic

928

1102

nonmethod_func = (dict(

929

1103

zip(attribute.func_code.co_freevars,

930

1104

attribute.__closure__))["func"]

941

1115

nonmethod_func.func_name,

942

1116

nonmethod_func.func_defaults,

943

1117

nonmethod_func.func_closure)))

1118

# Copy annotations, if any

1119

try:

1120

new_function._dbus_annotations = (

1121

dict(attribute._dbus_annotations))

1122

except AttributeError:

1123

pass

944

1124

# Define a creator of a function to call both the

945

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

946

# signals gets sent when the function is called

1125

# original and alternate functions, so both the

1126

# original and alternate signals gets sent when

1127

# the function is called

947

1128

def fixscope(func1, func2):

948

1129

"""This function is a scope container to pass

949

1130

func1 and func2 to the "call_both" function

956

1137

return call_both

957

1138

# Create the "call_both" function and add it to

958

1139

# the class

959

attr[attrname] = fixscope(attribute,

960

new_function)

1140

attr[attrname] = fixscope(attribute, new_function)

961

1141

# Is this a D-Bus method?

962

1142

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

963

1143

# Create a new, but exactly alike, function

974

1154

attribute.func_name,

975

1155

attribute.func_defaults,

976

1156

attribute.func_closure)))

1157

# Copy annotations, if any

1158

try:

1159

attr[attrname]._dbus_annotations = (

1160

dict(attribute._dbus_annotations))

1161

except AttributeError:

1162

pass

977

1163

# Is this a D-Bus property?

978

1164

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

979

1165

# Create a new, but exactly alike, function

993

1179

attribute.func_name,

994

1180

attribute.func_defaults,

995

1181

attribute.func_closure)))

996

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

997

998

1182

# Copy annotations, if any

1183

try:

1184

attr[attrname]._dbus_annotations = (

1185

dict(attribute._dbus_annotations))

1186

except AttributeError:

1187

pass

1188

# Is this a D-Bus interface?

1189

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

1190

# Create a new, but exactly alike, function

1191

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

1192

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

1193

# to the class.

1194

attr[attrname] = (dbus_interface_annotations

1195

(alt_interface)

1196

(types.FunctionType

1197

(attribute.func_code,

1198

attribute.func_globals,

1199

attribute.func_name,

1200

attribute.func_defaults,

1201

attribute.func_closure)))

1202

if deprecate:

1203

# Deprecate all alternate interfaces

1204

iname="_AlternateDBusNames_interface_annotation{0}"

1205

for interface_name in interface_names:

1206

@dbus_interface_annotations(interface_name)

1207

def func(self):

1208

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

1209

"true" }

1210

# Find an unused name

1211

for aname in (iname.format(i)

1212

for i in itertools.count()):

1213

if aname not in attr:

1214

attr[aname] = func

1215

break

1216

if interface_names:

1217

# Replace the class with a new subclass of it with

1218

# methods, signals, etc. as created above.

1219

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

1220

(cls,), attr)

1221

return cls

1222

return wrapper

1223

1224

1225

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

1226

"se.bsnet.fukt.Mandos"})

999

1227

class ClientDBus(Client, DBusObjectWithProperties):

1000

1228

"""A Client class using D-Bus

1001

1229

1012

1240

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

1013

1241

self.bus = bus

1014

1242

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

1015

1016

self._approvals_pending = 0

1017

1243

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

1018

1244

# the D-Bus

1019

1245

client_object_name = unicode(self.name).translate(

1023

1249

("/clients/" + client_object_name))

1024

1250

DBusObjectWithProperties.__init__(self, self.bus,

1025

1251

self.dbus_object_path)

1026

1252

1027

1253

def notifychangeproperty(transform_func,

1028

1254

dbus_name, type_func=lambda x: x,

1029

1255

variant_level=1):

1052

1278

1053

1279

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

1054

1280

1055

1056

1281

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1057

1282

approvals_pending = notifychangeproperty(dbus.Boolean,

1058

1283

"ApprovalPending",

1065

1290

checker is not None)

1066

1291

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1067

1292

"LastCheckedOK")

1293

last_checker_status = notifychangeproperty(dbus.Int16,

1294

"LastCheckerStatus")

1068

1295

last_approval_request = notifychangeproperty(

1069

1296

datetime_to_dbus, "LastApprovalRequest")

1070

1297

approved_by_default = notifychangeproperty(dbus.Boolean,

1138

1365

return False

1139

1366

1140

1367

def approve(self, value=True):

1141

self.send_changedstate()

1142

1368

self.approved = value

1143

1369

gobject.timeout_add(timedelta_to_milliseconds

1144

1370

(self.approval_duration),

1145

1371

self._reset_approved)

1146

1372

self.send_changedstate()

1147

1373

1148

1374

## D-Bus methods, signals & properties

1149

1375

_interface = "se.recompile.Mandos.Client"

1150

1376

1377

## Interfaces

1378

1379

@dbus_interface_annotations(_interface)

1380

def _foo(self):

1381

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

1382

"false"}

1383

1151

1384

## Signals

1152

1385

1153

1386

# CheckerCompleted - signal

1189

1422

"D-Bus signal"

1190

1423

return self.need_approval()

1191

1424

1192

# NeRwequest - signal

1193

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

1194

def NewRequest(self, ip):

1195

"""D-Bus signal

1196

Is sent after a client request a password.

1197

"""

1198

pass

1199

1200

1425

## Methods

1201

1426

1202

1427

# Approve - method

1312

1537

return

1313

1538

return datetime_to_dbus(self.last_checked_ok)

1314

1539

1540

# LastCheckerStatus - property

1541

@dbus_service_property(_interface, signature="n",

1542

access="read")

1543

def LastCheckerStatus_dbus_property(self):

1544

return dbus.Int16(self.last_checker_status)

1545

1315

1546

# Expires - property

1316

1547

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

1317

1548

def Expires_dbus_property(self):

1328

1559

def Timeout_dbus_property(self, value=None):

1329

1560

if value is None: # get

1330

1561

return dbus.UInt64(self.timeout_milliseconds())

1562

old_timeout = self.timeout

1331

1563

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

1332

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

1333

return

1334

# Reschedule timeout

1335

gobject.source_remove(self.disable_initiator_tag)

1336

self.disable_initiator_tag = None

1337

self.expires = None

1338

time_to_die = timedelta_to_milliseconds((self

1339

.last_checked_ok

1340

+ self.timeout)

1341

- datetime.datetime

1342

.utcnow())

1343

if time_to_die <= 0:

1344

# The timeout has passed

1345

self.disable()

1346

else:

1347

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

1348

+ datetime.timedelta(milliseconds =

1349

time_to_die))

1350

self.disable_initiator_tag = (gobject.timeout_add

1351

(time_to_die, self.disable))

1564

# Reschedule disabling

1565

if self.enabled:

1566

now = datetime.datetime.utcnow()

1567

self.expires += self.timeout - old_timeout

1568

if self.expires <= now:

1569

# The timeout has passed

1570

self.disable()

1571

else:

1572

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

1573

is None):

1574

return

1575

gobject.source_remove(self.disable_initiator_tag)

1576

self.disable_initiator_tag = (

1577

gobject.timeout_add(

1578

timedelta_to_milliseconds(self.expires - now),

1579

self.disable))

1352

1580

1353

1581

# ExtendedTimeout - property

1354

1582

@dbus_service_property(_interface, signature="t",

1433

1661

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

1434

1662

1435

1663

1436

class ClientDBusTransitional(ClientDBus):

1437

__metaclass__ = AlternateDBusNamesMetaclass

1438

1439

1440

1664

class ClientHandler(socketserver.BaseRequestHandler, object):

1441

1665

"""A class to handle client connections.

1442

1666

1510

1734

except KeyError:

1511

1735

return

1512

1736

1513

if self.server.use_dbus:

1514

# Emit D-Bus signal

1515

client.NewRequest(str(self.client_address))

1516

1517

1737

if client.approval_delay:

1518

1738

delay = client.approval_delay

1519

1739

client.approvals_pending += 1

1550

1770

#wait until timeout or approved

1551

1771

time = datetime.datetime.now()

1552

1772

client.changedstate.acquire()

1553

(client.changedstate.wait

1554

(float(client.timedelta_to_milliseconds(delay)

1555

/ 1000)))

1773

client.changedstate.wait(

1774

float(timedelta_to_milliseconds(delay)

1775

/ 1000))

1556

1776

client.changedstate.release()

1557

1777

time2 = datetime.datetime.now()

1558

1778

if (time2 - time) >= delay:

1574

1794

try:

1575

1795

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

1576

1796

except gnutls.errors.GNUTLSError as error:

1577

logger.warning("gnutls send failed")

1797

logger.warning("gnutls send failed",

1798

exc_info=error)

1578

1799

return

1579

1800

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

1580

1801

sent, len(client.secret)

1583

1804

1584

1805

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

1585

1806

# bump the timeout using extended_timeout

1586

client.checked_ok(client.extended_timeout)

1807

client.bump_timeout(client.extended_timeout)

1587

1808

if self.server.use_dbus:

1588

1809

# Emit D-Bus signal

1589

1810

client.GotSecret()

1594

1815

try:

1595

1816

session.bye()

1596

1817

except gnutls.errors.GNUTLSError as error:

1597

logger.warning("GnuTLS bye failed")

1818

logger.warning("GnuTLS bye failed",

1819

exc_info=error)

1598

1820

1599

1821

@staticmethod

1600

1822

def peer_certificate(session):

1665

1887

def sub_process_main(self, request, address):

1666

1888

try:

1667

1889

self.finish_request(request, address)

1668

except:

1890

except Exception:

1669

1891

self.handle_error(request, address)

1670

1892

self.close_request(request)

1671

1893

1672

1894

def process_request(self, request, address):

1673

1895

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

1674

1896

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

1675

args = (request,

1676

address))

1897

args = (request, address))

1677

1898

proc.start()

1678

1899

return proc

1679

1900

1707

1928

use_ipv6: Boolean; to use IPv6 or not

1708

1929

"""

1709

1930

def __init__(self, server_address, RequestHandlerClass,

1710

interface=None, use_ipv6=True):

1931

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

1932

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

1933

creating a new one with socket.socket().

1934

"""

1711

1935

self.interface = interface

1712

1936

if use_ipv6:

1713

1937

self.address_family = socket.AF_INET6

1938

if socketfd is not None:

1939

# Save the file descriptor

1940

self.socketfd = socketfd

1941

# Save the original socket.socket() function

1942

self.socket_socket = socket.socket

1943

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

1944

#

1945

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

1946

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

1947

# patching socket.socket.)

1948

#

1949

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

1950

@functools.wraps(socket.socket)

1951

def socket_wrapper(*args, **kwargs):

1952

# Restore original function so subsequent calls are

1953

# not affected.

1954

socket.socket = self.socket_socket

1955

del self.socket_socket

1956

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

1957

# saved file descriptor.

1958

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

1959

# Replace socket.socket() function with wrapper

1960

socket.socket = socket_wrapper

1961

# The socketserver.TCPServer.__init__ will call

1962

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

1963

# socket_wrapper(), if socketfd was set.

1714

1964

socketserver.TCPServer.__init__(self, server_address,

1715

1965

RequestHandlerClass)

1966

1716

1967

def server_bind(self):

1717

1968

"""This overrides the normal server_bind() function

1718

1969

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

1726

1977

try:

1727

1978

self.socket.setsockopt(socket.SOL_SOCKET,

1728

1979

SO_BINDTODEVICE,

1729

str(self.interface

1730

+ '\0'))

1980

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

1731

1981

except socket.error as error:

1732

if error[0] == errno.EPERM:

1733

logger.error("No permission to"

1734

" bind to interface %s",

1735

self.interface)

1736

elif error[0] == errno.ENOPROTOOPT:

1982

if error.errno == errno.EPERM:

1983

logger.error("No permission to bind to"

1984

" interface %s", self.interface)

1985

elif error.errno == errno.ENOPROTOOPT:

1737

1986

logger.error("SO_BINDTODEVICE not available;"

1738

1987

" cannot bind to interface %s",

1739

1988

self.interface)

1989

elif error.errno == errno.ENODEV:

1990

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

1991

" cannot bind", self.interface)

1740

1992

else:

1741

1993

raise

1742

1994

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

1745

1997

if self.address_family == socket.AF_INET6:

1746

1998

any_address = "::" # in6addr_any

1747

1999

else:

1748

any_address = socket.INADDR_ANY

2000

any_address = "0.0.0.0" # INADDR_ANY

1749

2001

self.server_address = (any_address,

1750

2002

self.server_address[1])

1751

2003

elif not self.server_address[1]:

1772

2024

"""

1773

2025

def __init__(self, server_address, RequestHandlerClass,

1774

2026

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

1775

gnutls_priority=None, use_dbus=True):

2027

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

1776

2028

self.enabled = False

1777

2029

self.clients = clients

1778

2030

if self.clients is None:

1782

2034

IPv6_TCPServer.__init__(self, server_address,

1783

2035

RequestHandlerClass,

1784

2036

interface = interface,

1785

use_ipv6 = use_ipv6)

2037

use_ipv6 = use_ipv6,

2038

socketfd = socketfd)

1786

2039

def server_activate(self):

1787

2040

if self.enabled:

1788

2041

return socketserver.TCPServer.server_activate(self)

1801

2054

1802

2055

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

1803

2056

proc = None, client_object=None):

1804

condition_names = {

1805

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

1806

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

1807

# blocking).

1808

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

1809

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

1810

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

1811

# broken, usually for pipes and

1812

# sockets).

1813

}

1814

conditions_string = ' | '.join(name

1815

for cond, name in

1816

condition_names.iteritems()

1817

if cond & condition)

1818

2057

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

1819

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

2058

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

1820

2059

# Wait for other process to exit

1821

2060

proc.join()

1822

2061

return False

1880

2119

return True

1881

2120

1882

2121

2122

def rfc3339_duration_to_delta(duration):

2123

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

2124

2125

>>> rfc3339_duration_to_delta("P7D")

2126

datetime.timedelta(7)

2127

>>> rfc3339_duration_to_delta("PT60S")

2128

datetime.timedelta(0, 60)

2129

>>> rfc3339_duration_to_delta("PT60M")

2130

datetime.timedelta(0, 3600)

2131

>>> rfc3339_duration_to_delta("PT24H")

2132

datetime.timedelta(1)

2133

>>> rfc3339_duration_to_delta("P1W")

2134

datetime.timedelta(7)

2135

>>> rfc3339_duration_to_delta("PT5M30S")

2136

datetime.timedelta(0, 330)

2137

>>> rfc3339_duration_to_delta("P1DT3M20S")

2138

datetime.timedelta(1, 200)

2139

"""

2140

2141

# Parsing an RFC 3339 duration with regular expressions is not

2142

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

2143

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

2144

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

2145

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

2146

# avoid excessive use of external libraries.

2147

2148

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

2149

Token = collections.namedtuple("Token",

2150

("regexp", # To match token; if

2151

# "value" is not None,

2152

# must have a "group"

2153

# containing digits

2154

"value", # datetime.timedelta or

2155

# None

2156

"followers")) # Tokens valid after

2157

# this token

2158

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

2159

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

2160

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

2161

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

2162

datetime.timedelta(seconds=1),

2163

frozenset((token_end,)))

2164

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

2165

datetime.timedelta(minutes=1),

2166

frozenset((token_second, token_end)))

2167

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

2168

datetime.timedelta(hours=1),

2169

frozenset((token_minute, token_end)))

2170

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

2171

None,

2172

frozenset((token_hour, token_minute,

2173

token_second)))

2174

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

2175

datetime.timedelta(days=1),

2176

frozenset((token_time, token_end)))

2177

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

2178

datetime.timedelta(weeks=4),

2179

frozenset((token_day, token_end)))

2180

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

2181

datetime.timedelta(weeks=52),

2182

frozenset((token_month, token_end)))

2183

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

2184

datetime.timedelta(weeks=1),

2185

frozenset((token_end,)))

2186

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

2187

frozenset((token_year, token_month,

2188

token_day, token_time,

2189

token_week))),

2190

# Define starting values

2191

value = datetime.timedelta() # Value so far

2192

found_token = None

2193

followers = frozenset(token_duration,) # Following valid tokens

2194

s = duration # String left to parse

2195

# Loop until end token is found

2196

while found_token is not token_end:

2197

# Search for any currently valid tokens

2198

for token in followers:

2199

match = token.regexp.match(s)

2200

if match is not None:

2201

# Token found

2202

if token.value is not None:

2203

# Value found, parse digits

2204

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

2205

# Add to value so far

2206

value += factor * token.value

2207

# Strip token from string

2208

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

2209

# Go to found token

2210

found_token = token

2211

# Set valid next tokens

2212

followers = found_token.followers

2213

break

2214

else:

2215

# No currently valid tokens were found

2216

raise ValueError("Invalid RFC 3339 duration")

2217

# End token found

2218

return value

2219

2220

1883

2221

def string_to_delta(interval):

1884

2222

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

1885

2223

1896

2234

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

1897

2235

datetime.timedelta(0, 330)

1898

2236

"""

2237

2238

try:

2239

return rfc3339_duration_to_delta(interval)

2240

except ValueError:

2241

pass

2242

1899

2243

timevalue = datetime.timedelta(0)

1900

2244

for s in interval.split():

1901

2245

try:

1912

2256

elif suffix == "w":

1913

2257

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

1914

2258

else:

1915

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

2259

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

2260

.format(suffix))

1916

2261

except (ValueError, IndexError) as e:

1917

2262

raise ValueError(*(e.args))

1918

2263

timevalue += delta

1932

2277

sys.exit()

1933

2278

if not noclose:

1934

2279

# Close all standard open file descriptors

1935

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

2280

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

1936

2281

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

1937

2282

raise OSError(errno.ENODEV,

1938

"%s not a character device"

1939

% os.path.devnull)

2283

"{0} not a character device"

2284

.format(os.devnull))

1940

2285

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

1941

2286

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

1942

2287

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

1951

2296

1952

2297

parser = argparse.ArgumentParser()

1953

2298

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

1954

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

2299

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

1955

2300

help="show version number and exit")

1956

2301

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

1957

2302

help="Bind to interface IF")

1963

2308

help="Run self-test")

1964

2309

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

1965

2310

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

1966

" to terminal")

2311

" to terminal", default=None)

1967

2312

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

1968

2313

help="Debug level for stdout output")

1969

2314

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

1976

2321

" files")

1977

2322

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

1978

2323

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

1979

" system bus interface")

2324

" system bus interface", default=None)

1980

2325

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

1981

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

2326

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

2327

default=None)

1982

2328

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

1983

2329

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

1984

" state")

2330

" state", default=None)

2331

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

2332

help="Specify a file descriptor to a network"

2333

" socket to use instead of creating one")

1985

2334

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

1986

2335

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

2336

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

2337

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

1987

2338

1988

2339

options = parser.parse_args()

1989

2340

1998

2349

"port": "",

1999

2350

"debug": "False",

2000

2351

"priority":

2001

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

2352

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

2002

2353

"servicename": "Mandos",

2003

2354

"use_dbus": "True",

2004

2355

"use_ipv6": "True",

2005

2356

"debuglevel": "",

2006

2357

"restore": "True",

2007

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

2358

"socket": "",

2359

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

2360

"foreground": "False",

2008

2361

}

2009

2362

2010

2363

# Parse config file for server-global settings

2015

2368

# Convert the SafeConfigParser object to a dict

2016

2369

server_settings = server_config.defaults()

2017

2370

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

2018

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

2371

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

2019

2372

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

2020

2373

option)

2021

2374

if server_settings["port"]:

2022

2375

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

2023

2376

"port")

2377

if server_settings["socket"]:

2378

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

2379

"socket")

2380

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

2381

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

2382

# happen with a supplied network socket.

2383

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

2384

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

2385

["socket"])

2024

2386

del server_config

2025

2387

2026

2388

# Override the settings from the config file with command line

2028

2390

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

2029

2391

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

2030

2392

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

2031

"statedir"):

2393

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

2032

2394

value = getattr(options, option)

2033

2395

if value is not None:

2034

2396

server_settings[option] = value

2037

2399

for option in server_settings.keys():

2038

2400

if type(server_settings[option]) is str:

2039

2401

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

2402

# Force all boolean options to be boolean

2403

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

2404

"foreground"):

2405

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

2406

# Debug implies foreground

2407

if server_settings["debug"]:

2408

server_settings["foreground"] = True

2040

2409

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

2041

2410

2042

2411

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

2048

2417

use_ipv6 = server_settings["use_ipv6"]

2049

2418

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

2050

2419

stored_state_file)

2420

foreground = server_settings["foreground"]

2051

2421

2052

2422

if debug:

2053

initlogger(logging.DEBUG)

2423

initlogger(debug, logging.DEBUG)

2054

2424

else:

2055

2425

if not debuglevel:

2056

initlogger()

2426

initlogger(debug)

2057

2427

else:

2058

2428

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

2059

initlogger(level)

2429

initlogger(debug, level)

2060

2430

2061

2431

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

2062

2432

syslogger.setFormatter(logging.Formatter

2063

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

2064

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

2065

% server_settings["servicename"]))

2433

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

2434

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

2435

.format(server_settings

2436

["servicename"])))

2066

2437

2067

2438

# Parse config file with clients

2068

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

2069

"extended_timeout": "15m",

2070

"interval": "2m",

2071

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

2072

"host": "",

2073

"approval_delay": "0s",

2074

"approval_duration": "1s",

2075

}

2076

client_config = configparser.SafeConfigParser(client_defaults)

2439

client_config = configparser.SafeConfigParser(Client

2440

.client_defaults)

2077

2441

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

2078

2442

"clients.conf"))

2079

2443

2088

2452

use_ipv6=use_ipv6,

2089

2453

gnutls_priority=

2090

2454

server_settings["priority"],

2091

use_dbus=use_dbus)

2092

if not debug:

2093

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

2455

use_dbus=use_dbus,

2456

socketfd=(server_settings["socket"]

2457

or None))

2458

if not foreground:

2459

pidfilename = "/run/mandos.pid"

2460

pidfile = None

2094

2461

try:

2095

2462

pidfile = open(pidfilename, "w")

2096

except IOError:

2097

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

2463

except IOError as e:

2464

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

2465

exc_info=e)

2098

2466

2099

try:

2100

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

2101

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

2102

except KeyError:

2467

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

2103

2468

try:

2104

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

2105

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

2469

uid = pwd.getpwnam(name).pw_uid

2470

gid = pwd.getpwnam(name).pw_gid

2471

break

2106

2472

except KeyError:

2107

try:

2108

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

2109

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

2110

except KeyError:

2111

uid = 65534

2112

gid = 65534

2473

continue

2474

else:

2475

uid = 65534

2476

gid = 65534

2113

2477

try:

2114

2478

os.setgid(gid)

2115

2479

os.setuid(uid)

2116

2480

except OSError as error:

2117

if error[0] != errno.EPERM:

2481

if error.errno != errno.EPERM:

2118

2482

raise error

2119

2483

2120

2484

if debug:

2132

2496

.gnutls_global_set_log_function(debug_gnutls))

2133

2497

2134

2498

# Redirect stdin so all checkers get /dev/null

2135

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

2499

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

2136

2500

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

2137

2501

if null > 2:

2138

2502

os.close(null)

2139

else:

2140

# No console logging

2141

logger.removeHandler(console)

2142

2503

2143

2504

# Need to fork before connecting to D-Bus

2144

if not debug:

2505

if not foreground:

2145

2506

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

2146

2507

daemon()

2147

2508

2509

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

2510

# need to inform gobject that threads will be used.

2511

gobject.threads_init()

2512

2148

2513

global main_loop

2149

2514

# From the Avahi example code

2150

DBusGMainLoop(set_as_default=True )

2515

DBusGMainLoop(set_as_default=True)

2151

2516

main_loop = gobject.MainLoop()

2152

2517

bus = dbus.SystemBus()

2153

2518

# End of Avahi example code

2159

2524

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

2160

2525

do_not_queue=True))

2161

2526

except dbus.exceptions.NameExistsException as e:

2162

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

2527

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

2163

2528

use_dbus = False

2164

2529

server_settings["use_dbus"] = False

2165

2530

tcp_server.use_dbus = False

2177

2542

2178

2543

client_class = Client

2179

2544

if use_dbus:

2180

client_class = functools.partial(ClientDBusTransitional,

2181

bus = bus)

2182

2183

special_settings = {

2184

# Some settings need to be accessd by special methods;

2185

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

2186

"approved_by_default":

2187

lambda section:

2188

client_config.getboolean(section, "approved_by_default"),

2189

"enabled":

2190

lambda section:

2191

client_config.getboolean(section, "enabled"),

2192

}

2193

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

2194

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

2195

# with exceptions for any special settings as defined above

2196

client_settings = dict((clientname,

2197

dict((setting,

2198

(value

2199

if setting not in special_settings

2200

else special_settings[setting]

2201

(clientname)))

2202

for setting, value in

2203

client_config.items(clientname)))

2204

for clientname in client_config.sections())

2205

2545

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

2546

2547

client_settings = Client.config_parser(client_config)

2206

2548

old_client_settings = {}

2207

clients_data = []

2549

clients_data = {}

2550

2551

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

2552

global wnull

2553

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

2554

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

2555

# mode

2556

if debug or not foreground:

2557

wnull.close()

2208

2558

2209

2559

# Get client data and settings from last running state.

2210

2560

if server_settings["restore"]:

2214

2564

(stored_state))

2215

2565

os.remove(stored_state_path)

2216

2566

except IOError as e:

2217

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

2218

.format(e))

2219

if e.errno != errno.ENOENT:

2567

if e.errno == errno.ENOENT:

2568

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

2569

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

2570

else:

2571

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

2572

exc_info=e)

2220

2573

raise

2574

except EOFError as e:

2575

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

2576

"EOFError:", exc_info=e)

2221

2577

2222

2578

with PGPEngine() as pgp:

2223

for client in clients_data:

2224

client_name = client["name"]

2579

for client_name, client in clients_data.iteritems():

2580

# Skip removed clients

2581

if client_name not in client_settings:

2582

continue

2225

2583

2226

2584

# Decide which value to use after restoring saved state.

2227

2585

# We have three different values: Old config file,

2236

2594

if (name != "secret" and

2237

2595

value != old_client_settings[client_name]

2238

2596

[name]):

2239

setattr(client, name, value)

2597

client[name] = value

2240

2598

except KeyError:

2241

2599

pass

2242

2600

2243

2601

# Clients who has passed its expire date can still be

2244

# enabled if its last checker was sucessful. Clients

2245

# whose checker failed before we stored its state is

2246

# assumed to have failed all checkers during downtime.

2602

# enabled if its last checker was successful. Clients

2603

# whose checker succeeded before we stored its state is

2604

# assumed to have successfully run all checkers during

2605

# downtime.

2247

2606

if client["enabled"]:

2248

if client["expires"] <= (datetime.datetime

2249

.utcnow()):

2250

# Client has expired

2251

if client["last_checker_status"] != 0:

2607

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

2608

if not client["last_checked_ok"]:

2609

logger.warning(

2610

"disabling client {0} - Client never "

2611

"performed a successful checker"

2612

.format(client_name))

2613

client["enabled"] = False

2614

elif client["last_checker_status"] != 0:

2615

logger.warning(

2616

"disabling client {0} - Client "

2617

"last checker failed with error code {1}"

2618

.format(client_name,

2619

client["last_checker_status"]))

2252

2620

client["enabled"] = False

2253

2621

else:

2254

2622

client["expires"] = (datetime.datetime

2255

2623

.utcnow()

2256

2624

+ client["timeout"])

2257

2258

client["changedstate"] = (multiprocessing_manager

2259

.Condition

2260

(multiprocessing_manager

2261

.Lock()))

2262

if use_dbus:

2263

new_client = (ClientDBusTransitional.__new__

2264

(ClientDBusTransitional))

2265

tcp_server.clients[client_name] = new_client

2266

new_client.bus = bus

2267

for name, value in client.iteritems():

2268

setattr(new_client, name, value)

2269

client_object_name = unicode(client_name).translate(

2270

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

2271

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

2272

new_client.dbus_object_path = (dbus.ObjectPath

2273

("/clients/"

2274

+ client_object_name))

2275

DBusObjectWithProperties.__init__(new_client,

2276

new_client.bus,

2277

new_client

2278

.dbus_object_path)

2279

else:

2280

tcp_server.clients[client_name] = (Client.__new__

2281

(Client))

2282

for name, value in client.iteritems():

2283

setattr(tcp_server.clients[client_name],

2284

name, value)

2285

2625

logger.debug("Last checker succeeded,"

2626

" keeping {0} enabled"

2627

.format(client_name))

2286

2628

try:

2287

tcp_server.clients[client_name].secret = (

2288

pgp.decrypt(tcp_server.clients[client_name]

2289

.encrypted_secret,

2629

client["secret"] = (

2630

pgp.decrypt(client["encrypted_secret"],

2290

2631

client_settings[client_name]

2291

2632

["secret"]))

2292

2633

except PGPError:

2293

2634

# If decryption fails, we use secret from new settings

2294

2635

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

2295

2636

.format(client_name))

2296

tcp_server.clients[client_name].secret = (

2637

client["secret"] = (

2297

2638

client_settings[client_name]["secret"])

2298

2639

2299

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

2300

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

2301

del tcp_server.clients[clientname]

2302

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

2303

tcp_server.clients[clientname] = (client_class(name

2304

= clientname,

2305

config =

2306

client_settings

2307

[clientname]))

2640

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

2641

for client_name in (set(old_client_settings)

2642

- set(client_settings)):

2643

del clients_data[client_name]

2644

for client_name in (set(client_settings)

2645

- set(old_client_settings)):

2646

clients_data[client_name] = client_settings[client_name]

2647

2648

# Create all client objects

2649

for client_name, client in clients_data.iteritems():

2650

tcp_server.clients[client_name] = client_class(

2651

name = client_name, settings = client,

2652

server_settings = server_settings)

2308

2653

2309

2654

if not tcp_server.clients:

2310

2655

logger.warning("No clients defined")

2311

2312

if not debug:

2313

try:

2314

with pidfile:

2315

pid = os.getpid()

2316

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

2317

del pidfile

2318

except IOError:

2319

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

2320

pidfilename, pid)

2321

except NameError:

2322

# "pidfile" was never created

2323

pass

2656

2657

if not foreground:

2658

if pidfile is not None:

2659

try:

2660

with pidfile:

2661

pid = os.getpid()

2662

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

2663

except IOError:

2664

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

2665

pidfilename, pid)

2666

del pidfile

2324

2667

del pidfilename

2325

2326

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

2327

2668

2328

2669

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

2329

2670

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

2330

2671

2331

2672

if use_dbus:

2332

class MandosDBusService(dbus.service.Object):

2673

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

2674

"se.bsnet.fukt.Mandos"})

2675

class MandosDBusService(DBusObjectWithProperties):

2333

2676

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

2334

2677

def __init__(self):

2335

2678

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

2336

2679

_interface = "se.recompile.Mandos"

2337

2680

2681

@dbus_interface_annotations(_interface)

2682

def _foo(self):

2683

return { "org.freedesktop.DBus.Property"

2684

".EmitsChangedSignal":

2685

"false"}

2686

2338

2687

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

2339

2688

def ClientAdded(self, objpath):

2340

2689

"D-Bus signal"

2382

2731

2383

2732

del _interface

2384

2733

2385

class MandosDBusServiceTransitional(MandosDBusService):

2386

__metaclass__ = AlternateDBusNamesMetaclass

2387

mandos_dbus_service = MandosDBusServiceTransitional()

2734

mandos_dbus_service = MandosDBusService()

2388

2735

2389

2736

def cleanup():

2390

2737

"Cleanup function; run on exit"

2391

2738

service.cleanup()

2392

2739

2393

2740

multiprocessing.active_children()

2741

wnull.close()

2394

2742

if not (tcp_server.clients or client_settings):

2395

2743

return

2396

2744

2397

2745

# Store client before exiting. Secrets are encrypted with key

2398

2746

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

2399

2747

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

2400

clients = []

2748

clients = {}

2401

2749

with PGPEngine() as pgp:

2402

2750

for client in tcp_server.clients.itervalues():

2403

2751

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

2405

2753

key)

2406

2754

client_dict = {}

2407

2755

2408

# A list of attributes that will not be stored when

2409

# shutting down.

2410

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

2756

# A list of attributes that can not be pickled

2757

# + secret.

2758

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

2759

"checker", "server_settings"))

2411

2760

for name, typ in (inspect.getmembers

2412

2761

(dbus.service.Object)):

2413

2762

exclude.add(name)

2418

2767

if attr not in exclude:

2419

2768

client_dict[attr] = getattr(client, attr)

2420

2769

2421

clients.append(client_dict)

2770

clients[client.name] = client_dict

2422

2771

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

2423

2772

2424

2773

try:

2425

with os.fdopen(os.open(stored_state_path,

2426

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

2427

0600), "wb") as stored_state:

2774

with (tempfile.NamedTemporaryFile

2775

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

2776

dir=os.path.dirname(stored_state_path),

2777

delete=False)) as stored_state:

2428

2778

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

2779

tempname=stored_state.name

2780

os.rename(tempname, stored_state_path)

2429

2781

except (IOError, OSError) as e:

2430

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

2431

.format(e))

2432

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

2433

raise

2782

if not debug:

2783

try:

2784

os.remove(tempname)

2785

except NameError:

2786

pass

2787

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

2788

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

2789

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

2790

else:

2791

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

2792

exc_info=e)

2793

raise e

2434

2794

2435

2795

# Delete all clients, and settings from config

2436

2796

while tcp_server.clients:

2463

2823

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

2464

2824

if use_ipv6:

2465

2825

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

2466

" flowinfo %d, scope_id %d"

2467

% tcp_server.socket.getsockname())

2826

" flowinfo %d, scope_id %d",

2827

*tcp_server.socket.getsockname())

2468

2828

else: # IPv4

2469

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

2470

% tcp_server.socket.getsockname())

2829

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

2830

*tcp_server.socket.getsockname())

2471

2831

2472

2832

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

2473

2833

2476

2836

try:

2477

2837

service.activate()

2478

2838

except dbus.exceptions.DBusException as error:

2479

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

2839

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

2480

2840

cleanup()

2481

2841

sys.exit(1)

2482

2842

# End of Avahi example code

2489

2849

logger.debug("Starting main loop")

2490

2850

main_loop.run()

2491

2851

except AvahiError as error:

2492

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

2852

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

2493

2853

cleanup()

2494

2854

sys.exit(1)

2495

2855

except KeyboardInterrupt:

2500

2860

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

2501

2861

cleanup()

2502

2862

2503

2504

2863

if __name__ == '__main__':

2505

2864

main()