/mandos/trunk : revision 505.1.2

1

#!/usr/bin/python2.7

1

#!/usr/bin/python

2

# -*- mode: python; coding: utf-8 -*-

3

#

4

# Mandos server - give out binary blobs to connecting clients.

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

65

63

import cPickle as pickle

66

64

import multiprocessing

67

65

import types

68

import binascii

69

import tempfile

70

import itertools

71

import collections

72

66

73

67

import dbus

74

68

import dbus.service

88

82

except ImportError:

89

83

SO_BINDTODEVICE = None

90

84

91

version = "1.6.8"

92

stored_state_file = "clients.pickle"

93

94

logger = logging.getLogger()

95

syslogger = None

96

97

try:

98

if_nametoindex = (ctypes.cdll.LoadLibrary

99

(ctypes.util.find_library("c"))

100

.if_nametoindex)

101

except (OSError, AttributeError):

102

def if_nametoindex(interface):

103

"Get an interface index the hard way, i.e. using fcntl()"

104

SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h

105

with contextlib.closing(socket.socket()) as s:

106

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

107

struct.pack(str("16s16x"),

108

interface))

109

interface_index = struct.unpack(str("I"),

110

ifreq[16:20])[0]

111

return interface_index

112

113

114

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

115

"""init logger and add loglevel"""

116

117

global syslogger

118

syslogger = (logging.handlers.SysLogHandler

119

(facility =

120

logging.handlers.SysLogHandler.LOG_DAEMON,

121

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

122

syslogger.setFormatter(logging.Formatter

123

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

124

' %(message)s'))

125

logger.addHandler(syslogger)

126

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)

134

logger.setLevel(level)

135

136

137

class PGPError(Exception):

138

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

139

pass

140

141

142

class PGPEngine(object):

143

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

144

def __init__(self):

145

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

146

self.gnupgargs = ['--batch',

147

'--home', self.tempdir,

148

'--force-mdc',

149

'--quiet',

150

'--no-use-agent']

151

152

def __enter__(self):

153

return self

154

155

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

156

self._cleanup()

157

return False

158

159

def __del__(self):

160

self._cleanup()

161

162

def _cleanup(self):

163

if self.tempdir is not None:

164

# Delete contents of tempdir

165

for root, dirs, files in os.walk(self.tempdir,

166

topdown = False):

167

for filename in files:

168

os.remove(os.path.join(root, filename))

169

for dirname in dirs:

170

os.rmdir(os.path.join(root, dirname))

171

# Remove tempdir

172

os.rmdir(self.tempdir)

173

self.tempdir = None

174

175

def password_encode(self, password):

176

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

177

# 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

185

186

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)

202

return ciphertext

203

204

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)

221

return decrypted_plaintext

222

85

86

version = "1.3.1"

87

88

#logger = logging.getLogger('mandos')

89

logger = logging.Logger('mandos')

90

syslogger = (logging.handlers.SysLogHandler

91

(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

92

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

93

syslogger.setFormatter(logging.Formatter

94

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

95

' %(message)s'))

96

logger.addHandler(syslogger)

97

98

console = logging.StreamHandler()

99

console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'

100

' %(levelname)s:'

101

' %(message)s'))

102

logger.addHandler(console)

223

103

224

104

class AvahiError(Exception):

225

105

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

243

123

Used to optionally bind to the specified interface.

244

124

name: string; Example: 'Mandos'

245

125

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

246

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

126

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

247

127

port: integer; what port to announce

248

128

TXT: list of strings; TXT record for the service

249

129

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

255

135

server: D-Bus Server

256

136

bus: dbus.SystemBus()

257

137

"""

258

259

138

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

260

139

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

261

140

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

274

153

self.server = None

275

154

self.bus = bus

276

155

self.entry_group_state_changed_match = None

277

278

156

def rename(self):

279

157

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

280

158

if self.rename_count >= self.max_renames:

282

160

" after %i retries, exiting.",

283

161

self.rename_count)

284

162

raise AvahiServiceError("Too many renames")

285

self.name = unicode(self.server

286

.GetAlternativeServiceName(self.name))

163

self.name = unicode(self.server.GetAlternativeServiceName(self.name))

287

164

logger.info("Changing Zeroconf service name to %r ...",

288

165

self.name)

166

syslogger.setFormatter(logging.Formatter

167

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

168

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

169

% self.name))

289

170

self.remove()

290

171

try:

291

172

self.add()

292

173

except dbus.exceptions.DBusException as error:

293

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

174

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

294

175

self.cleanup()

295

176

os._exit(1)

296

177

self.rename_count += 1

297

298

178

def remove(self):

299

179

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

300

180

if self.entry_group_state_changed_match is not None:

302

182

self.entry_group_state_changed_match = None

303

183

if self.group is not None:

304

184

self.group.Reset()

305

306

185

def add(self):

307

186

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

308

187

self.remove()

313

192

avahi.DBUS_INTERFACE_ENTRY_GROUP)

314

193

self.entry_group_state_changed_match = (

315

194

self.group.connect_to_signal(

316

'StateChanged', self.entry_group_state_changed))

195

'StateChanged', self .entry_group_state_changed))

317

196

logger.debug("Adding Zeroconf service '%s' of type '%s' ...",

318

197

self.name, self.type)

319

198

self.group.AddService(

325

204

dbus.UInt16(self.port),

326

205

avahi.string_array_to_txt_array(self.TXT))

327

206

self.group.Commit()

328

329

207

def entry_group_state_changed(self, state, error):

330

208

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

331

209

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

338

216

elif state == avahi.ENTRY_GROUP_FAILURE:

339

217

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

340

218

unicode(error))

341

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

342

.format(error))

343

219

raise AvahiGroupError("State changed: %s"

220

% unicode(error))

344

221

def cleanup(self):

345

222

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

346

223

if self.group is not None:

347

224

try:

348

225

self.group.Free()

349

226

except (dbus.exceptions.UnknownMethodException,

350

dbus.exceptions.DBusException):

227

dbus.exceptions.DBusException) as e:

351

228

pass

352

229

self.group = None

353

230

self.remove()

354

355

231

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

356

232

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

357

233

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

376

252

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

377

253

else:

378

254

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

379

380

255

def activate(self):

381

256

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

382

257

if self.server is None:

390

265

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

391

266

392

267

393

class AvahiServiceToSyslog(AvahiService):

394

def rename(self):

395

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

396

ret = AvahiService.rename(self)

397

syslogger.setFormatter(logging.Formatter

398

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

399

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

400

.format(self.name)))

401

return ret

402

403

268

def _timedelta_to_milliseconds(td):

269

"Convert a datetime.timedelta() to milliseconds"

270

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

271

+ (td.seconds * 1000)

272

+ (td.microseconds // 1000))

273

404

274

class Client(object):

405

275

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

406

276

407

277

Attributes:

408

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

278

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

409

279

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

410

280

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

411

281

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

418

288

instance %(name)s can be used in the command.

419

289

checker_initiator_tag: a gobject event source tag, or None

420

290

created: datetime.datetime(); (UTC) object creation

421

client_structure: Object describing what attributes a client has

422

and is used for storing the client at exit

423

291

current_checker_command: string; current running checker_command

292

disable_hook: If set, called by disable() as disable_hook(self)

424

293

disable_initiator_tag: a gobject event source tag, or None

425

294

enabled: bool()

426

295

fingerprint: string (40 or 32 hexadecimal digits); used to

429

298

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

430

299

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

431

300

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

432

last_checker_status: integer between 0 and 255 reflecting exit

433

status of last checker. -1 reflects crashed

434

checker, -2 means no checker completed yet.

435

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

301

last_enabled: datetime.datetime(); (UTC)

436

302

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

437

303

D-Bus identifiers

438

304

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

439

305

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

440

306

until this client is disabled

441

extended_timeout: extra long timeout when secret has been sent

307

extended_timeout: extra long timeout when password has been sent

442

308

runtime_expansions: Allowed attributes for runtime expansion.

443

309

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

444

310

disabled, or None

445

server_settings: The server_settings dict from main()

446

311

"""

447

312

448

313

runtime_expansions = ("approval_delay", "approval_duration",

449

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

450

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

451

"last_approval_request", "last_checked_ok",

314

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

315

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

452

316

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

453

client_defaults = { "timeout": "PT5M",

454

"extended_timeout": "PT15M",

455

"interval": "PT2M",

456

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

457

"host": "",

458

"approval_delay": "PT0S",

459

"approval_duration": "PT1S",

460

"approved_by_default": "True",

461

"enabled": "True",

462

}

463

464

@staticmethod

465

def config_parser(config):

466

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

467

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

468

with exceptions for any special settings as defined above.

469

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

470

value given the same arguments.

471

"""

472

settings = {}

473

for client_name in config.sections():

474

section = dict(config.items(client_name))

475

client = settings[client_name] = {}

476

477

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

478

# Reformat values from string types to Python types

479

client["approved_by_default"] = config.getboolean(

480

client_name, "approved_by_default")

481

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

482

"enabled")

483

484

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

485

.replace(" ", ""))

486

if "secret" in section:

487

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

488

elif "secfile" in section:

489

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

490

(section["secfile"])),

491

"rb") as secfile:

492

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

493

else:

494

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

495

.format(section))

496

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

497

client["extended_timeout"] = string_to_delta(

498

section["extended_timeout"])

499

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

500

client["approval_delay"] = string_to_delta(

501

section["approval_delay"])

502

client["approval_duration"] = string_to_delta(

503

section["approval_duration"])

504

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

505

client["last_approval_request"] = None

506

client["last_checked_ok"] = None

507

client["last_checker_status"] = -2

508

509

return settings

510

511

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

317

318

def timeout_milliseconds(self):

319

"Return the 'timeout' attribute in milliseconds"

320

return _timedelta_to_milliseconds(self.timeout)

321

322

def extended_timeout_milliseconds(self):

323

"Return the 'extended_timeout' attribute in milliseconds"

324

return _timedelta_to_milliseconds(self.extended_timeout)

325

326

def interval_milliseconds(self):

327

"Return the 'interval' attribute in milliseconds"

328

return _timedelta_to_milliseconds(self.interval)

329

330

def approval_delay_milliseconds(self):

331

return _timedelta_to_milliseconds(self.approval_delay)

332

333

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

334

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

335

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

336

attribute."""

512

337

self.name = name

513

if server_settings is None:

514

server_settings = {}

515

self.server_settings = server_settings

516

# adding all client settings

517

for setting, value in settings.items():

518

setattr(self, setting, value)

519

520

if self.enabled:

521

if not hasattr(self, "last_enabled"):

522

self.last_enabled = datetime.datetime.utcnow()

523

if not hasattr(self, "expires"):

524

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

525

+ self.timeout)

526

else:

527

self.last_enabled = None

528

self.expires = None

529

338

if config is None:

339

config = {}

530

340

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

531

341

# Uppercase and remove spaces from fingerprint for later

532

342

# comparison purposes with return value from the fingerprint()

533

343

# function

344

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

345

.replace(" ", ""))

534

346

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

535

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

536

datetime.datetime.utcnow())

537

538

# attributes specific for this server instance

347

if "secret" in config:

348

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

349

elif "secfile" in config:

350

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

351

(config["secfile"])),

352

"rb") as secfile:

353

self.secret = secfile.read()

354

else:

355

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

356

% self.name)

357

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

358

self.created = datetime.datetime.utcnow()

359

self.enabled = False

360

self.last_approval_request = None

361

self.last_enabled = None

362

self.last_checked_ok = None

363

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

364

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

365

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

366

self.disable_hook = disable_hook

539

367

self.checker = None

540

368

self.checker_initiator_tag = None

541

369

self.disable_initiator_tag = None

370

self.expires = None

542

371

self.checker_callback_tag = None

372

self.checker_command = config["checker"]

543

373

self.current_checker_command = None

544

self.approved = None

374

self.last_connect = None

375

self._approved = None

376

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

377

True)

545

378

self.approvals_pending = 0

546

self.changedstate = (multiprocessing_manager

547

.Condition(multiprocessing_manager

548

.Lock()))

549

self.client_structure = [attr for attr in

550

self.__dict__.iterkeys()

551

if not attr.startswith("_")]

552

self.client_structure.append("client_structure")

553

554

for name, t in inspect.getmembers(type(self),

555

lambda obj:

556

isinstance(obj,

557

property)):

558

if not name.startswith("_"):

559

self.client_structure.append(name)

379

self.approval_delay = string_to_delta(

380

config["approval_delay"])

381

self.approval_duration = string_to_delta(

382

config["approval_duration"])

383

self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())

560

384

561

# Send notice to process children that client state has changed

562

385

def send_changedstate(self):

563

with self.changedstate:

564

self.changedstate.notify_all()

565

386

self.changedstate.acquire()

387

self.changedstate.notify_all()

388

self.changedstate.release()

389

566

390

def enable(self):

567

391

"""Start this client's checker and timeout hooks"""

568

392

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

569

393

# Already enabled

570

394

return

395

self.send_changedstate()

396

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

397

# and every interval from then on.

398

self.checker_initiator_tag = (gobject.timeout_add

399

(self.interval_milliseconds(),

400

self.start_checker))

401

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

571

402

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

403

self.disable_initiator_tag = (gobject.timeout_add

404

(self.timeout_milliseconds(),

405

self.disable))

572

406

self.enabled = True

573

407

self.last_enabled = datetime.datetime.utcnow()

574

self.init_checker()

575

self.send_changedstate()

408

# Also start a new checker *right now*.

409

self.start_checker()

576

410

577

411

def disable(self, quiet=True):

578

412

"""Disable this client."""

579

413

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

580

414

return False

581

415

if not quiet:

416

self.send_changedstate()

417

if not quiet:

582

418

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

583

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

419

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

584

420

gobject.source_remove(self.disable_initiator_tag)

585

421

self.disable_initiator_tag = None

586

422

self.expires = None

587

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

423

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

588

424

gobject.source_remove(self.checker_initiator_tag)

589

425

self.checker_initiator_tag = None

590

426

self.stop_checker()

427

if self.disable_hook:

428

self.disable_hook(self)

591

429

self.enabled = False

592

if not quiet:

593

self.send_changedstate()

594

430

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

595

431

return False

596

432

597

433

def __del__(self):

434

self.disable_hook = None

598

435

self.disable()

599

436

600

def init_checker(self):

601

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

602

# and every interval from then on.

603

if self.checker_initiator_tag is not None:

604

gobject.source_remove(self.checker_initiator_tag)

605

self.checker_initiator_tag = (gobject.timeout_add

606

(int(self.interval

607

.total_seconds() * 1000),

608

self.start_checker))

609

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

610

if self.disable_initiator_tag is not None:

611

gobject.source_remove(self.disable_initiator_tag)

612

self.disable_initiator_tag = (gobject.timeout_add

613

(int(self.timeout

614

.total_seconds() * 1000),

615

self.disable))

616

# Also start a new checker *right now*.

617

self.start_checker()

618

619

437

def checker_callback(self, pid, condition, command):

620

438

"""The checker has completed, so take appropriate actions."""

621

439

self.checker_callback_tag = None

622

440

self.checker = None

623

441

if os.WIFEXITED(condition):

624

self.last_checker_status = os.WEXITSTATUS(condition)

625

if self.last_checker_status == 0:

442

exitstatus = os.WEXITSTATUS(condition)

443

if exitstatus == 0:

626

444

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

627

445

vars(self))

628

446

self.checked_ok()

630

448

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

631

449

vars(self))

632

450

else:

633

self.last_checker_status = -1

634

451

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

635

452

vars(self))

636

453

637

def checked_ok(self):

638

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

639

self.last_checked_ok = datetime.datetime.utcnow()

640

self.last_checker_status = 0

641

self.bump_timeout()

642

643

def bump_timeout(self, timeout=None):

644

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

454

def checked_ok(self, timeout=None):

455

"""Bump up the timeout for this client.

456

457

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

458

alive and well.

459

"""

645

460

if timeout is None:

646

461

timeout = self.timeout

647

if self.disable_initiator_tag is not None:

648

gobject.source_remove(self.disable_initiator_tag)

649

self.disable_initiator_tag = None

650

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

651

self.disable_initiator_tag = (gobject.timeout_add

652

(int(timeout.total_seconds()

653

* 1000), self.disable))

654

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

462

self.last_checked_ok = datetime.datetime.utcnow()

463

gobject.source_remove(self.disable_initiator_tag)

464

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

465

self.disable_initiator_tag = (gobject.timeout_add

466

(_timedelta_to_milliseconds(timeout),

467

self.disable))

655

468

656

469

def need_approval(self):

657

470

self.last_approval_request = datetime.datetime.utcnow()

662

475

If a checker already exists, leave it running and do

663

476

nothing."""

664

477

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

665

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

666

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

667

# would inevitably timeout, since no checker would get a

668

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

478

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

479

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

480

# client would inevitably timeout, since no checker would get

481

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

669

482

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

670

483

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

671

484

# should be.

673

486

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

674

487

try:

675

488

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

676

except AttributeError:

677

pass

678

except OSError as error:

679

if error.errno != errno.ECHILD:

680

raise

489

except (AttributeError, OSError) as error:

490

if (isinstance(error, OSError)

491

and error.errno != errno.ECHILD):

492

raise error

681

493

else:

682

494

if pid:

683

495

logger.warning("Checker was a zombie")

686

498

self.current_checker_command)

687

499

# Start a new checker if needed

688

500

if self.checker is None:

689

# Escape attributes for the shell

690

escaped_attrs = { attr:

691

re.escape(unicode(getattr(self,

692

attr)))

693

for attr in self.runtime_expansions }

694

501

try:

695

command = self.checker_command % escaped_attrs

696

except TypeError as error:

697

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

698

self.checker_command, exc_info=error)

699

return True # Try again later

502

# In case checker_command has exactly one % operator

503

command = self.checker_command % self.host

504

except TypeError:

505

# Escape attributes for the shell

506

escaped_attrs = dict(

507

(attr,

508

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

509

errors=

510

'replace')))

511

for attr in

512

self.runtime_expansions)

513

514

try:

515

command = self.checker_command % escaped_attrs

516

except TypeError as error:

517

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

518

' %s', self.checker_command, error)

519

return True # Try again later

700

520

self.current_checker_command = command

701

521

try:

702

522

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

705

525

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

706

526

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

707

527

# always replaced by /dev/null.)

708

# The exception is when not debugging but nevertheless

709

# running in the foreground; use the previously

710

# created wnull.

711

popen_args = {}

712

if (not self.server_settings["debug"]

713

and self.server_settings["foreground"]):

714

popen_args.update({"stdout": wnull,

715

"stderr": wnull })

716

528

self.checker = subprocess.Popen(command,

717

529

close_fds=True,

718

shell=True, cwd="/",

719

**popen_args)

720

except OSError as error:

721

logger.error("Failed to start subprocess",

722

exc_info=error)

723

return True

724

self.checker_callback_tag = (gobject.child_watch_add

725

(self.checker.pid,

726

self.checker_callback,

727

data=command))

728

# The checker may have completed before the gobject

729

# watch was added. Check for this.

730

try:

530

shell=True, cwd="/")

531

self.checker_callback_tag = (gobject.child_watch_add

532

(self.checker.pid,

533

self.checker_callback,

534

data=command))

535

# The checker may have completed before the gobject

536

# watch was added. Check for this.

731

537

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

538

if pid:

539

gobject.source_remove(self.checker_callback_tag)

540

self.checker_callback(pid, status, command)

732

541

except OSError as error:

733

if error.errno == errno.ECHILD:

734

# This should never happen

735

logger.error("Child process vanished",

736

exc_info=error)

737

return True

738

raise

739

if pid:

740

gobject.source_remove(self.checker_callback_tag)

741

self.checker_callback(pid, status, command)

542

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

543

error)

742

544

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

743

545

return True

744

546

751

553

return

752

554

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

753

555

try:

754

self.checker.terminate()

556

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

755

557

#time.sleep(0.5)

756

558

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

757

# self.checker.kill()

559

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

758

560

except OSError as error:

759

561

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

760

562

raise

777

579

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

778

580

if byte_arrays and signature != "ay":

779

581

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

780

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

582

" signature %r" % signature)

781

583

def decorator(func):

782

584

func._dbus_is_property = True

783

585

func._dbus_interface = dbus_interface

791

593

return decorator

792

594

793

595

794

def dbus_interface_annotations(dbus_interface):

795

"""Decorator for marking functions returning interface annotations

796

797

Usage:

798

799

@dbus_interface_annotations("org.example.Interface")

800

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

801

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

802

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

803

"false"}

804

"""

805

def decorator(func):

806

func._dbus_is_interface = True

807

func._dbus_interface = dbus_interface

808

func._dbus_name = dbus_interface

809

return func

810

return decorator

811

812

813

def dbus_annotations(annotations):

814

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

815

Usage:

816

817

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

818

access="r")

819

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

820

"org.freedesktop.DBus.Property."

821

"EmitsChangedSignal": "false"})

822

def Property_dbus_property(self):

823

return dbus.Boolean(False)

824

"""

825

def decorator(func):

826

func._dbus_annotations = annotations

827

return func

828

return decorator

829

830

831

596

class DBusPropertyException(dbus.exceptions.DBusException):

832

597

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

833

598

"""

856

621

"""

857

622

858

623

@staticmethod

859

def _is_dbus_thing(thing):

860

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

861

862

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

863

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

864

"""

865

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

866

False)

624

def _is_dbus_property(obj):

625

return getattr(obj, "_dbus_is_property", False)

867

626

868

def _get_all_dbus_things(self, thing):

627

def _get_all_dbus_properties(self):

869

628

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

870

629

"""

871

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

872

name),

873

athing.__get__(self))

630

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

874

631

for cls in self.__class__.__mro__

875

for name, athing in

876

inspect.getmembers(cls,

877

self._is_dbus_thing(thing)))

632

for name, prop in inspect.getmembers(cls, self._is_dbus_property))

878

633

879

634

def _get_dbus_property(self, interface_name, property_name):

880

635

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

881

636

property with the specified name and interface.

882

637

"""

883

638

for cls in self.__class__.__mro__:

884

for name, value in (inspect.getmembers

885

(cls,

886

self._is_dbus_thing("property"))):

887

if (value._dbus_name == property_name

888

and value._dbus_interface == interface_name):

639

for name, value in inspect.getmembers(cls, self._is_dbus_property):

640

if value._dbus_name == property_name and value._dbus_interface == interface_name:

889

641

return value.__get__(self)

890

642

891

643

# No such property

917

669

# The byte_arrays option is not supported yet on

918

670

# signatures other than "ay".

919

671

if prop._dbus_signature != "ay":

920

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

921

"'ay' signature {!r}"

922

.format(prop._dbus_signature))

923

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

924

for byte in value))

672

raise ValueError

673

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

674

for byte in value))

925

675

prop(value)

926

676

927

677

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

932

682

933

683

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

934

684

"""

935

properties = {}

936

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

685

all = {}

686

for name, prop in self._get_all_dbus_properties():

937

687

if (interface_name

938

688

and interface_name != prop._dbus_interface):

939

689

# Interface non-empty but did not match

943

693

continue

944

694

value = prop()

945

695

if not hasattr(value, "variant_level"):

946

properties[name] = value

696

all[name] = value

947

697

continue

948

properties[name] = type(value)(value, variant_level=

949

value.variant_level+1)

950

return dbus.Dictionary(properties, signature="sv")

698

all[name] = type(value)(value, variant_level=

699

value.variant_level+1)

700

return dbus.Dictionary(all, signature="sv")

951

701

952

702

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

953

703

out_signature="s",

954

704

path_keyword='object_path',

955

705

connection_keyword='connection')

956

706

def Introspect(self, object_path, connection):

957

"""Overloading of standard D-Bus method.

958

959

Inserts property tags and interface annotation tags.

707

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

960

708

"""

961

709

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

962

710

connection)

969

717

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

970

718

return e

971

719

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

972

# Add property tags

973

720

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

974

721

for name, prop

975

in self._get_all_dbus_things("property")

722

in self._get_all_dbus_properties()

976

723

if prop._dbus_interface

977

724

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

978

725

if_tag.appendChild(tag)

979

# Add annotation tags

980

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

981

for tag in if_tag.getElementsByTagName(typ):

982

annots = dict()

983

for name, prop in (self.

984

_get_all_dbus_things(typ)):

985

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

986

and prop._dbus_interface

987

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

988

annots.update(getattr

989

(prop,

990

"_dbus_annotations",

991

{}))

992

for name, value in annots.items():

993

ann_tag = document.createElement(

994

"annotation")

995

ann_tag.setAttribute("name", name)

996

ann_tag.setAttribute("value", value)

997

tag.appendChild(ann_tag)

998

# Add interface annotation tags

999

for annotation, value in dict(

1000

itertools.chain.from_iterable(

1001

annotations().items()

1002

for name, annotations in

1003

self._get_all_dbus_things("interface")

1004

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

1005

)).items():

1006

ann_tag = document.createElement("annotation")

1007

ann_tag.setAttribute("name", annotation)

1008

ann_tag.setAttribute("value", value)

1009

if_tag.appendChild(ann_tag)

1010

726

# Add the names to the return values for the

1011

727

# "org.freedesktop.DBus.Properties" methods

1012

728

if (if_tag.getAttribute("name")

1027

743

except (AttributeError, xml.dom.DOMException,

1028

744

xml.parsers.expat.ExpatError) as error:

1029

745

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

1030

exc_info=error)

746

error)

1031

747

return xmlstring

1032

748

1033

749

1034

def datetime_to_dbus(dt, variant_level=0):

750

def datetime_to_dbus (dt, variant_level=0):

1035

751

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

1036

752

if dt is None:

1037

753

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

1038

754

return dbus.String(dt.isoformat(),

1039

755

variant_level=variant_level)

1040

756

1041

1042

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1043

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

1044

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

1045

interface names according to the "alt_interface_names" mapping.

1046

Usage:

1047

1048

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

1049

"net.example.AlternateInterface"})

1050

class SampleDBusObject(dbus.service.Object):

1051

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

1052

def SampleDBusMethod():

1053

pass

1054

1055

The above "SampleDBusMethod" on "SampleDBusObject" will be

1056

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

1057

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

1058

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

1059

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

1060

1061

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

1062

(from DBusObjectWithProperties) and interfaces (from the

1063

dbus_interface_annotations decorator).

757

class AlternateDBusNamesMetaclass(DBusObjectWithProperties.__metaclass__):

758

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

759

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

1064

760

"""

1065

def wrapper(cls):

1066

for orig_interface_name, alt_interface_name in (

1067

alt_interface_names.items()):

1068

attr = {}

1069

interface_names = set()

1070

# Go though all attributes of the class

1071

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

761

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

762

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

763

# methods, signals, or properties in them

764

for base in (b for b in bases

765

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

766

# Go though all attributes of the base class

767

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

1072

768

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

1073

769

# with the wrong interface name

1074

770

if (not hasattr(attribute, "_dbus_interface")

1075

771

or not attribute._dbus_interface

1076

.startswith(orig_interface_name)):

772

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

1077

773

continue

1078

774

# Create an alternate D-Bus interface name based on

1079

775

# the current name

1080

776

alt_interface = (attribute._dbus_interface

1081

.replace(orig_interface_name,

1082

alt_interface_name))

1083

interface_names.add(alt_interface)

777

.replace("se.recompile.Mandos",

778

"se.bsnet.fukt.Mandos"))

1084

779

# Is this a D-Bus signal?

1085

780

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

1086

# Extract the original non-method undecorated

1087

# function by black magic

781

# Extract the original non-method function by

782

# black magic

1088

783

nonmethod_func = (dict(

1089

784

zip(attribute.func_code.co_freevars,

1090

785

attribute.__closure__))["func"]

1101

796

nonmethod_func.func_name,

1102

797

nonmethod_func.func_defaults,

1103

798

nonmethod_func.func_closure)))

1104

# Copy annotations, if any

1105

try:

1106

new_function._dbus_annotations = (

1107

dict(attribute._dbus_annotations))

1108

except AttributeError:

1109

pass

1110

799

# Define a creator of a function to call both the

1111

# original and alternate functions, so both the

1112

# original and alternate signals gets sent when

1113

# the function is called

800

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

801

# signals gets sent when the function is called

1114

802

def fixscope(func1, func2):

1115

803

"""This function is a scope container to pass

1116

804

func1 and func2 to the "call_both" function

1123

811

return call_both

1124

812

# Create the "call_both" function and add it to

1125

813

# the class

1126

attr[attrname] = fixscope(attribute, new_function)

814

attr[attrname] = fixscope(attribute,

815

new_function)

1127

816

# Is this a D-Bus method?

1128

817

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

1129

818

# Create a new, but exactly alike, function

1140

829

attribute.func_name,

1141

830

attribute.func_defaults,

1142

831

attribute.func_closure)))

1143

# Copy annotations, if any

1144

try:

1145

attr[attrname]._dbus_annotations = (

1146

dict(attribute._dbus_annotations))

1147

except AttributeError:

1148

pass

1149

832

# Is this a D-Bus property?

1150

833

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

1151

834

# Create a new, but exactly alike, function

1165

848

attribute.func_name,

1166

849

attribute.func_defaults,

1167

850

attribute.func_closure)))

1168

# Copy annotations, if any

1169

try:

1170

attr[attrname]._dbus_annotations = (

1171

dict(attribute._dbus_annotations))

1172

except AttributeError:

1173

pass

1174

# Is this a D-Bus interface?

1175

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

1176

# Create a new, but exactly alike, function

1177

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

1178

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

1179

# to the class.

1180

attr[attrname] = (dbus_interface_annotations

1181

(alt_interface)

1182

(types.FunctionType

1183

(attribute.func_code,

1184

attribute.func_globals,

1185

attribute.func_name,

1186

attribute.func_defaults,

1187

attribute.func_closure)))

1188

if deprecate:

1189

# Deprecate all alternate interfaces

1190

iname="_AlternateDBusNames_interface_annotation{}"

1191

for interface_name in interface_names:

1192

@dbus_interface_annotations(interface_name)

1193

def func(self):

1194

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

1195

"true" }

1196

# Find an unused name

1197

for aname in (iname.format(i)

1198

for i in itertools.count()):

1199

if aname not in attr:

1200

attr[aname] = func

1201

break

1202

if interface_names:

1203

# Replace the class with a new subclass of it with

1204

# methods, signals, etc. as created above.

1205

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

1206

(cls,), attr)

1207

return cls

1208

return wrapper

1209

1210

1211

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

1212

"se.bsnet.fukt.Mandos"})

851

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

852

1213

853

class ClientDBus(Client, DBusObjectWithProperties):

1214

854

"""A Client class using D-Bus

1215

855

1224

864

# dbus.service.Object doesn't use super(), so we can't either.

1225

865

1226

866

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

867

self._approvals_pending = 0

1227

868

self.bus = bus

1228

869

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

1229

870

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

1235

876

("/clients/" + client_object_name))

1236

877

DBusObjectWithProperties.__init__(self, self.bus,

1237

878

self.dbus_object_path)

1238

879

1239

880

def notifychangeproperty(transform_func,

1240

881

dbus_name, type_func=lambda x: x,

1241

882

variant_level=1):

1242

883

""" Modify a variable so that it's a property which announces

1243

884

its changes to DBus.

1244

1245

transform_fun: Function that takes a value and a variant_level

1246

and transforms it to a D-Bus type.

885

886

transform_fun: Function that takes a value and transforms it

887

to a D-Bus type.

1247

888

dbus_name: D-Bus name of the variable

1248

889

type_func: Function that transform the value before sending it

1249

890

to the D-Bus. Default: no transform

1250

891

variant_level: D-Bus variant level. Default: 1

1251

892

"""

1252

attrname = "_{}".format(dbus_name)

893

real_value = [None,]

1253

894

def setter(self, value):

895

old_value = real_value[0]

896

real_value[0] = value

1254

897

if hasattr(self, "dbus_object_path"):

1255

if (not hasattr(self, attrname) or

1256

type_func(getattr(self, attrname, None))

1257

!= type_func(value)):

1258

dbus_value = transform_func(type_func(value),

1259

variant_level

1260

=variant_level)

898

if type_func(old_value) != type_func(real_value[0]):

899

dbus_value = transform_func(type_func(real_value[0]),

900

variant_level)

1261

901

self.PropertyChanged(dbus.String(dbus_name),

1262

902

dbus_value)

1263

setattr(self, attrname, value)

1264

903

1265

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

904

return property(lambda self: real_value[0], setter)

905

1266

906

1267

907

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1268

908

approvals_pending = notifychangeproperty(dbus.Boolean,

1272

912

last_enabled = notifychangeproperty(datetime_to_dbus,

1273

913

"LastEnabled")

1274

914

checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",

1275

type_func = lambda checker:

1276

checker is not None)

915

type_func = lambda checker: checker is not None)

1277

916

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1278

917

"LastCheckedOK")

1279

last_checker_status = notifychangeproperty(dbus.Int16,

1280

"LastCheckerStatus")

1281

last_approval_request = notifychangeproperty(

1282

datetime_to_dbus, "LastApprovalRequest")

918

last_approval_request = notifychangeproperty(datetime_to_dbus,

919

"LastApprovalRequest")

1283

920

approved_by_default = notifychangeproperty(dbus.Boolean,

1284

921

"ApprovedByDefault")

1285

approval_delay = notifychangeproperty(dbus.UInt64,

1286

"ApprovalDelay",

1287

type_func =

1288

lambda td: td.total_seconds()

1289

* 1000)

1290

approval_duration = notifychangeproperty(

1291

dbus.UInt64, "ApprovalDuration",

1292

type_func = lambda td: td.total_seconds() * 1000)

922

approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",

923

type_func = _timedelta_to_milliseconds)

924

approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",

925

type_func = _timedelta_to_milliseconds)

1293

926

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

1294

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

1295

type_func = lambda td:

1296

td.total_seconds() * 1000)

1297

extended_timeout = notifychangeproperty(

1298

dbus.UInt64, "ExtendedTimeout",

1299

type_func = lambda td: td.total_seconds() * 1000)

1300

interval = notifychangeproperty(dbus.UInt64,

1301

"Interval",

1302

type_func =

1303

lambda td: td.total_seconds()

1304

* 1000)

927

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

928

type_func = _timedelta_to_milliseconds)

929

extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",

930

type_func = _timedelta_to_milliseconds)

931

interval = notifychangeproperty(dbus.UInt16, "Interval",

932

type_func = _timedelta_to_milliseconds)

1305

933

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

1306

934

1307

935

del notifychangeproperty

1335

963

*args, **kwargs)

1336

964

1337

965

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

1338

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

966

old_checker = self.checker

967

if self.checker is not None:

968

old_checker_pid = self.checker.pid

969

else:

970

old_checker_pid = None

1339

971

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

1340

972

# Only if new checker process was started

1341

973

if (self.checker is not None

1345

977

return r

1346

978

1347

979

def _reset_approved(self):

1348

self.approved = None

980

self._approved = None

1349

981

return False

1350

982

1351

983

def approve(self, value=True):

1352

self.approved = value

1353

gobject.timeout_add(int(self.approval_duration.total_seconds()

1354

* 1000), self._reset_approved)

1355

984

self.send_changedstate()

985

self._approved = value

986

gobject.timeout_add(_timedelta_to_milliseconds

987

(self.approval_duration),

988

self._reset_approved)

989

1356

990

1357

991

## D-Bus methods, signals & properties

1358

992

_interface = "se.recompile.Mandos.Client"

1359

993

1360

## Interfaces

1361

1362

@dbus_interface_annotations(_interface)

1363

def _foo(self):

1364

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

1365

"false"}

1366

1367

994

## Signals

1368

995

1369

996

# CheckerCompleted - signal

1460

1087

access="readwrite")

1461

1088

def ApprovalDelay_dbus_property(self, value=None):

1462

1089

if value is None: # get

1463

return dbus.UInt64(self.approval_delay.total_seconds()

1464

* 1000)

1090

return dbus.UInt64(self.approval_delay_milliseconds())

1465

1091

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

1466

1092

1467

1093

# ApprovalDuration - property

1469

1095

access="readwrite")

1470

1096

def ApprovalDuration_dbus_property(self, value=None):

1471

1097

if value is None: # get

1472

return dbus.UInt64(self.approval_duration.total_seconds()

1473

* 1000)

1098

return dbus.UInt64(_timedelta_to_milliseconds(

1099

self.approval_duration))

1474

1100

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

1475

1101

1476

1102

# Name - property

1489

1115

def Host_dbus_property(self, value=None):

1490

1116

if value is None: # get

1491

1117

return dbus.String(self.host)

1492

self.host = unicode(value)

1118

self.host = value

1493

1119

1494

1120

# Created - property

1495

1121

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

1496

1122

def Created_dbus_property(self):

1497

return datetime_to_dbus(self.created)

1123

return dbus.String(datetime_to_dbus(self.created))

1498

1124

1499

1125

# LastEnabled - property

1500

1126

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

1521

1147

return

1522

1148

return datetime_to_dbus(self.last_checked_ok)

1523

1149

1524

# LastCheckerStatus - property

1525

@dbus_service_property(_interface, signature="n",

1526

access="read")

1527

def LastCheckerStatus_dbus_property(self):

1528

return dbus.Int16(self.last_checker_status)

1529

1530

1150

# Expires - property

1531

1151

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

1532

1152

def Expires_dbus_property(self):

1542

1162

access="readwrite")

1543

1163

def Timeout_dbus_property(self, value=None):

1544

1164

if value is None: # get

1545

return dbus.UInt64(self.timeout.total_seconds() * 1000)

1546

old_timeout = self.timeout

1165

return dbus.UInt64(self.timeout_milliseconds())

1547

1166

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

1548

# Reschedule disabling

1549

if self.enabled:

1550

now = datetime.datetime.utcnow()

1551

self.expires += self.timeout - old_timeout

1552

if self.expires <= now:

1553

# The timeout has passed

1554

self.disable()

1555

else:

1556

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

1557

is None):

1558

return

1559

gobject.source_remove(self.disable_initiator_tag)

1560

self.disable_initiator_tag = (

1561

gobject.timeout_add(

1562

int((self.expires - now).total_seconds()

1563

* 1000), self.disable))

1167

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

1168

return

1169

# Reschedule timeout

1170

gobject.source_remove(self.disable_initiator_tag)

1171

self.disable_initiator_tag = None

1172

self.expires = None

1173

time_to_die = (self.

1174

_timedelta_to_milliseconds((self

1175

.last_checked_ok

1176

+ self.timeout)

1177

- datetime.datetime

1178

.utcnow()))

1179

if time_to_die <= 0:

1180

# The timeout has passed

1181

self.disable()

1182

else:

1183

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

1184

+ datetime.timedelta(milliseconds = time_to_die))

1185

self.disable_initiator_tag = (gobject.timeout_add

1186

(time_to_die, self.disable))

1564

1187

1565

1188

# ExtendedTimeout - property

1566

1189

@dbus_service_property(_interface, signature="t",

1567

1190

access="readwrite")

1568

1191

def ExtendedTimeout_dbus_property(self, value=None):

1569

1192

if value is None: # get

1570

return dbus.UInt64(self.extended_timeout.total_seconds()

1571

* 1000)

1193

return dbus.UInt64(self.extended_timeout_milliseconds())

1572

1194

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

1573

1195

1574

1196

# Interval - property

1576

1198

access="readwrite")

1577

1199

def Interval_dbus_property(self, value=None):

1578

1200

if value is None: # get

1579

return dbus.UInt64(self.interval.total_seconds() * 1000)

1201

return dbus.UInt64(self.interval_milliseconds())

1580

1202

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

1581

1203

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

1582

1204

return

1583

if self.enabled:

1584

# Reschedule checker run

1585

gobject.source_remove(self.checker_initiator_tag)

1586

self.checker_initiator_tag = (gobject.timeout_add

1587

(value, self.start_checker))

1588

self.start_checker() # Start one now, too

1205

# Reschedule checker run

1206

gobject.source_remove(self.checker_initiator_tag)

1207

self.checker_initiator_tag = (gobject.timeout_add

1208

(value, self.start_checker))

1209

self.start_checker() # Start one now, too

1589

1210

1590

1211

# Checker - property

1591

1212

@dbus_service_property(_interface, signature="s",

1593

1214

def Checker_dbus_property(self, value=None):

1594

1215

if value is None: # get

1595

1216

return dbus.String(self.checker_command)

1596

self.checker_command = unicode(value)

1217

self.checker_command = value

1597

1218

1598

1219

# CheckerRunning - property

1599

1220

@dbus_service_property(_interface, signature="b",

1628

1249

raise KeyError()

1629

1250

1630

1251

def __getattribute__(self, name):

1631

if name == '_pipe':

1252

if(name == '_pipe'):

1632

1253

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

1633

1254

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

1634

1255

data = self._pipe.recv()

1641

1262

return func

1642

1263

1643

1264

def __setattr__(self, name, value):

1644

if name == '_pipe':

1265

if(name == '_pipe'):

1645

1266

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

1646

1267

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

1647

1268

1269

class ClientDBusTransitional(ClientDBus):

1270

__metaclass__ = AlternateDBusNamesMetaclass

1648

1271

1649

1272

class ClientHandler(socketserver.BaseRequestHandler, object):

1650

1273

"""A class to handle client connections.

1687

1310

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

1688

1311

try:

1689

1312

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

1690

raise RuntimeError(line)

1313

raise RuntimeError

1691

1314

except (ValueError, IndexError, RuntimeError) as error:

1692

1315

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

1693

1316

return

1730

1353

client.name)

1731

1354

if self.server.use_dbus:

1732

1355

# Emit D-Bus signal

1733

client.Rejected("Disabled")

1356

client.Rejected("Disabled")

1734

1357

return

1735

1358

1736

if client.approved or not client.approval_delay:

1359

if client._approved or not client.approval_delay:

1737

1360

#We are approved or approval is disabled

1738

1361

break

1739

elif client.approved is None:

1362

elif client._approved is None:

1740

1363

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

1741

1364

client.name)

1742

1365

if self.server.use_dbus:

1743

1366

# Emit D-Bus signal

1744

1367

client.NeedApproval(

1745

client.approval_delay.total_seconds()

1746

* 1000, client.approved_by_default)

1368

client.approval_delay_milliseconds(),

1369

client.approved_by_default)

1747

1370

else:

1748

1371

logger.warning("Client %s was not approved",

1749

1372

client.name)

1753

1376

return

1754

1377

1755

1378

#wait until timeout or approved

1379

#x = float(client._timedelta_to_milliseconds(delay))

1756

1380

time = datetime.datetime.now()

1757

1381

client.changedstate.acquire()

1758

client.changedstate.wait(delay.total_seconds())

1382

client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))

1759

1383

client.changedstate.release()

1760

1384

time2 = datetime.datetime.now()

1761

1385

if (time2 - time) >= delay:

1777

1401

try:

1778

1402

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

1779

1403

except gnutls.errors.GNUTLSError as error:

1780

logger.warning("gnutls send failed",

1781

exc_info=error)

1404

logger.warning("gnutls send failed")

1782

1405

return

1783

1406

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

1784

1407

sent, len(client.secret)

1786

1409

sent_size += sent

1787

1410

1788

1411

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

1789

# bump the timeout using extended_timeout

1790

client.bump_timeout(client.extended_timeout)

1412

# bump the timeout as if seen

1413

client.checked_ok(client.extended_timeout)

1791

1414

if self.server.use_dbus:

1792

1415

# Emit D-Bus signal

1793

1416

client.GotSecret()

1798

1421

try:

1799

1422

session.bye()

1800

1423

except gnutls.errors.GNUTLSError as error:

1801

logger.warning("GnuTLS bye failed",

1802

exc_info=error)

1424

logger.warning("GnuTLS bye failed")

1803

1425

1804

1426

@staticmethod

1805

1427

def peer_certificate(session):

1861

1483

# Convert the buffer to a Python bytestring

1862

1484

fpr = ctypes.string_at(buf, buf_len.value)

1863

1485

# Convert the bytestring to hexadecimal notation

1864

hex_fpr = binascii.hexlify(fpr).upper()

1486

hex_fpr = ''.join("%02X" % ord(char) for char in fpr)

1865

1487

return hex_fpr

1866

1488

1867

1489

1870

1492

def sub_process_main(self, request, address):

1871

1493

try:

1872

1494

self.finish_request(request, address)

1873

except Exception:

1495

except:

1874

1496

self.handle_error(request, address)

1875

1497

self.close_request(request)

1876

1498

1877

1499

def process_request(self, request, address):

1878

1500

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

1879

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

1880

args = (request, address))

1881

proc.start()

1882

return proc

1501

multiprocessing.Process(target = self.sub_process_main,

1502

args = (request, address)).start()

1883

1503

1884

1504

1885

1505

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1891

1511

"""

1892

1512

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1893

1513

1894

proc = MultiprocessingMixIn.process_request(self, request,

1895

client_address)

1514

super(MultiprocessingMixInWithPipe,

1515

self).process_request(request, client_address)

1896

1516

self.child_pipe.close()

1897

self.add_pipe(parent_pipe, proc)

1517

self.add_pipe(parent_pipe)

1898

1518

1899

def add_pipe(self, parent_pipe, proc):

1519

def add_pipe(self, parent_pipe):

1900

1520

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

1901

raise NotImplementedError()

1521

raise NotImplementedError

1902

1522

1903

1523

1904

1524

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1911

1531

use_ipv6: Boolean; to use IPv6 or not

1912

1532

"""

1913

1533

def __init__(self, server_address, RequestHandlerClass,

1914

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

1915

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

1916

creating a new one with socket.socket().

1917

"""

1534

interface=None, use_ipv6=True):

1918

1535

self.interface = interface

1919

1536

if use_ipv6:

1920

1537

self.address_family = socket.AF_INET6

1921

if socketfd is not None:

1922

# Save the file descriptor

1923

self.socketfd = socketfd

1924

# Save the original socket.socket() function

1925

self.socket_socket = socket.socket

1926

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

1927

#

1928

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

1929

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

1930

# patching socket.socket.)

1931

#

1932

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

1933

@functools.wraps(socket.socket)

1934

def socket_wrapper(*args, **kwargs):

1935

# Restore original function so subsequent calls are

1936

# not affected.

1937

socket.socket = self.socket_socket

1938

del self.socket_socket

1939

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

1940

# saved file descriptor.

1941

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

1942

# Replace socket.socket() function with wrapper

1943

socket.socket = socket_wrapper

1944

# The socketserver.TCPServer.__init__ will call

1945

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

1946

# socket_wrapper(), if socketfd was set.

1947

1538

socketserver.TCPServer.__init__(self, server_address,

1948

1539

RequestHandlerClass)

1949

1950

1540

def server_bind(self):

1951

1541

"""This overrides the normal server_bind() function

1952

1542

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

1960

1550

try:

1961

1551

self.socket.setsockopt(socket.SOL_SOCKET,

1962

1552

SO_BINDTODEVICE,

1963

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

1553

str(self.interface

1554

+ '\0'))

1964

1555

except socket.error as error:

1965

if error.errno == errno.EPERM:

1966

logger.error("No permission to bind to"

1967

" interface %s", self.interface)

1968

elif error.errno == errno.ENOPROTOOPT:

1556

if error[0] == errno.EPERM:

1557

logger.error("No permission to"

1558

" bind to interface %s",

1559

self.interface)

1560

elif error[0] == errno.ENOPROTOOPT:

1969

1561

logger.error("SO_BINDTODEVICE not available;"

1970

1562

" cannot bind to interface %s",

1971

1563

self.interface)

1972

elif error.errno == errno.ENODEV:

1973

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

1974

" cannot bind", self.interface)

1975

1564

else:

1976

1565

raise

1977

1566

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

1980

1569

if self.address_family == socket.AF_INET6:

1981

1570

any_address = "::" # in6addr_any

1982

1571

else:

1983

any_address = "0.0.0.0" # INADDR_ANY

1572

any_address = socket.INADDR_ANY

1984

1573

self.server_address = (any_address,

1985

1574

self.server_address[1])

1986

1575

elif not self.server_address[1]:

2007

1596

"""

2008

1597

def __init__(self, server_address, RequestHandlerClass,

2009

1598

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

2010

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

1599

gnutls_priority=None, use_dbus=True):

2011

1600

self.enabled = False

2012

1601

self.clients = clients

2013

1602

if self.clients is None:

2014

self.clients = {}

1603

self.clients = set()

2015

1604

self.use_dbus = use_dbus

2016

1605

self.gnutls_priority = gnutls_priority

2017

1606

IPv6_TCPServer.__init__(self, server_address,

2018

1607

RequestHandlerClass,

2019

1608

interface = interface,

2020

use_ipv6 = use_ipv6,

2021

socketfd = socketfd)

1609

use_ipv6 = use_ipv6)

2022

1610

def server_activate(self):

2023

1611

if self.enabled:

2024

1612

return socketserver.TCPServer.server_activate(self)

2025

2026

1613

def enable(self):

2027

1614

self.enabled = True

2028

2029

def add_pipe(self, parent_pipe, proc):

1615

def add_pipe(self, parent_pipe):

2030

1616

# Call "handle_ipc" for both data and EOF events

2031

1617

gobject.io_add_watch(parent_pipe.fileno(),

2032

1618

gobject.IO_IN | gobject.IO_HUP,

2033

1619

functools.partial(self.handle_ipc,

2034

parent_pipe =

2035

parent_pipe,

2036

proc = proc))

2037

1620

parent_pipe = parent_pipe))

1621

2038

1622

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

2039

proc = None, client_object=None):

2040

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

2041

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

2042

# Wait for other process to exit

2043

proc.join()

1623

client_object=None):

1624

condition_names = {

1625

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

1626

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

1627

# blocking).

1628

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

1629

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

1630

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

1631

# broken, usually for pipes and

1632

# sockets).

1633

}

1634

conditions_string = ' | '.join(name

1635

for cond, name in

1636

condition_names.iteritems()

1637

if cond & condition)

1638

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

1639

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

2044

1640

return False

2045

1641

2046

1642

# Read a request from the child

2051

1647

fpr = request[1]

2052

1648

address = request[2]

2053

1649

2054

for c in self.clients.itervalues():

1650

for c in self.clients:

2055

1651

if c.fingerprint == fpr:

2056

1652

client = c

2057

1653

break

2060

1656

"dress: %s", fpr, address)

2061

1657

if self.use_dbus:

2062

1658

# Emit D-Bus signal

2063

mandos_dbus_service.ClientNotFound(fpr,

2064

address[0])

1659

mandos_dbus_service.ClientNotFound(fpr, address[0])

2065

1660

parent_pipe.send(False)

2066

1661

return False

2067

1662

2068

1663

gobject.io_add_watch(parent_pipe.fileno(),

2069

1664

gobject.IO_IN | gobject.IO_HUP,

2070

1665

functools.partial(self.handle_ipc,

2071

parent_pipe =

2072

parent_pipe,

2073

proc = proc,

2074

client_object =

2075

client))

1666

parent_pipe = parent_pipe,

1667

client_object = client))

2076

1668

parent_pipe.send(True)

2077

# remove the old hook in favor of the new above hook on

2078

# same fileno

1669

# remove the old hook in favor of the new above hook on same fileno

2079

1670

return False

2080

1671

if command == 'funcall':

2081

1672

funcname = request[1]

2082

1673

args = request[2]

2083

1674

kwargs = request[3]

2084

1675

2085

parent_pipe.send(('data', getattr(client_object,

2086

funcname)(*args,

2087

**kwargs)))

1676

parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))

2088

1677

2089

1678

if command == 'getattr':

2090

1679

attrname = request[1]

2091

1680

if callable(client_object.__getattribute__(attrname)):

2092

1681

parent_pipe.send(('function',))

2093

1682

else:

2094

parent_pipe.send(('data', client_object

2095

.__getattribute__(attrname)))

1683

parent_pipe.send(('data', client_object.__getattribute__(attrname)))

2096

1684

2097

1685

if command == 'setattr':

2098

1686

attrname = request[1]

2102

1690

return True

2103

1691

2104

1692

2105

def rfc3339_duration_to_delta(duration):

2106

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

2107

2108

>>> rfc3339_duration_to_delta("P7D")

2109

datetime.timedelta(7)

2110

>>> rfc3339_duration_to_delta("PT60S")

2111

datetime.timedelta(0, 60)

2112

>>> rfc3339_duration_to_delta("PT60M")

2113

datetime.timedelta(0, 3600)

2114

>>> rfc3339_duration_to_delta("PT24H")

2115

datetime.timedelta(1)

2116

>>> rfc3339_duration_to_delta("P1W")

2117

datetime.timedelta(7)

2118

>>> rfc3339_duration_to_delta("PT5M30S")

2119

datetime.timedelta(0, 330)

2120

>>> rfc3339_duration_to_delta("P1DT3M20S")

2121

datetime.timedelta(1, 200)

2122

"""

2123

2124

# Parsing an RFC 3339 duration with regular expressions is not

2125

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

2126

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

2127

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

2128

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

2129

# avoid excessive use of external libraries.

2130

2131

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

2132

Token = collections.namedtuple("Token",

2133

("regexp", # To match token; if

2134

# "value" is not None,

2135

# must have a "group"

2136

# containing digits

2137

"value", # datetime.timedelta or

2138

# None

2139

"followers")) # Tokens valid after

2140

# this token

2141

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

2142

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

2143

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

2144

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

2145

datetime.timedelta(seconds=1),

2146

frozenset((token_end,)))

2147

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

2148

datetime.timedelta(minutes=1),

2149

frozenset((token_second, token_end)))

2150

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

2151

datetime.timedelta(hours=1),

2152

frozenset((token_minute, token_end)))

2153

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

2154

None,

2155

frozenset((token_hour, token_minute,

2156

token_second)))

2157

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

2158

datetime.timedelta(days=1),

2159

frozenset((token_time, token_end)))

2160

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

2161

datetime.timedelta(weeks=4),

2162

frozenset((token_day, token_end)))

2163

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

2164

datetime.timedelta(weeks=52),

2165

frozenset((token_month, token_end)))

2166

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

2167

datetime.timedelta(weeks=1),

2168

frozenset((token_end,)))

2169

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

2170

frozenset((token_year, token_month,

2171

token_day, token_time,

2172

token_week)))

2173

# Define starting values

2174

value = datetime.timedelta() # Value so far

2175

found_token = None

2176

followers = frozenset((token_duration,)) # Following valid tokens

2177

s = duration # String left to parse

2178

# Loop until end token is found

2179

while found_token is not token_end:

2180

# Search for any currently valid tokens

2181

for token in followers:

2182

match = token.regexp.match(s)

2183

if match is not None:

2184

# Token found

2185

if token.value is not None:

2186

# Value found, parse digits

2187

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

2188

# Add to value so far

2189

value += factor * token.value

2190

# Strip token from string

2191

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

2192

# Go to found token

2193

found_token = token

2194

# Set valid next tokens

2195

followers = found_token.followers

2196

break

2197

else:

2198

# No currently valid tokens were found

2199

raise ValueError("Invalid RFC 3339 duration")

2200

# End token found

2201

return value

2202

2203

2204

1693

def string_to_delta(interval):

2205

1694

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

2206

1695

2217

1706

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

2218

1707

datetime.timedelta(0, 330)

2219

1708

"""

2220

2221

try:

2222

return rfc3339_duration_to_delta(interval)

2223

except ValueError:

2224

pass

2225

2226

1709

timevalue = datetime.timedelta(0)

2227

1710

for s in interval.split():

2228

1711

try:

2239

1722

elif suffix == "w":

2240

1723

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

2241

1724

else:

2242

raise ValueError("Unknown suffix {!r}"

2243

.format(suffix))

2244

except IndexError as e:

1725

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

1726

except (ValueError, IndexError) as e:

2245

1727

raise ValueError(*(e.args))

2246

1728

timevalue += delta

2247

1729

return timevalue

2248

1730

2249

1731

1732

def if_nametoindex(interface):

1733

"""Call the C function if_nametoindex(), or equivalent

1734

1735

Note: This function cannot accept a unicode string."""

1736

global if_nametoindex

1737

try:

1738

if_nametoindex = (ctypes.cdll.LoadLibrary

1739

(ctypes.util.find_library("c"))

1740

.if_nametoindex)

1741

except (OSError, AttributeError):

1742

logger.warning("Doing if_nametoindex the hard way")

1743

def if_nametoindex(interface):

1744

"Get an interface index the hard way, i.e. using fcntl()"

1745

SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h

1746

with contextlib.closing(socket.socket()) as s:

1747

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1748

struct.pack(str("16s16x"),

1749

interface))

1750

interface_index = struct.unpack(str("I"),

1751

ifreq[16:20])[0]

1752

return interface_index

1753

return if_nametoindex(interface)

1754

1755

2250

1756

def daemon(nochdir = False, noclose = False):

2251

1757

"""See daemon(3). Standard BSD Unix function.

2252

1758

2260

1766

sys.exit()

2261

1767

if not noclose:

2262

1768

# Close all standard open file descriptors

2263

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

1769

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

2264

1770

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

2265

raise OSError(errno.ENODEV, "{} not a character device"

2266

.format(os.devnull))

1771

raise OSError(errno.ENODEV,

1772

"%s not a character device"

1773

% os.path.devnull)

2267

1774

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

2268

1775

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

2269

1776

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

2278

1785

2279

1786

parser = argparse.ArgumentParser()

2280

1787

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

2281

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

1788

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

2282

1789

help="show version number and exit")

2283

1790

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

2284

1791

help="Bind to interface IF")

2290

1797

help="Run self-test")

2291

1798

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

2292

1799

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

2293

" to terminal", default=None)

1800

" to terminal")

2294

1801

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

2295

1802

help="Debug level for stdout output")

2296

1803

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

2303

1810

" files")

2304

1811

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

2305

1812

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

2306

" system bus interface", default=None)

1813

" system bus interface")

2307

1814

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

2308

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

2309

default=None)

2310

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

2311

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

2312

" state", default=None)

2313

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

2314

help="Specify a file descriptor to a network"

2315

" socket to use instead of creating one")

2316

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

2317

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

2318

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

2319

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

2320

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

2321

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

2322

default=None)

2323

1815

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

2324

1816

options = parser.parse_args()

2325

1817

2326

1818

if options.check:

2327

1819

import doctest

2328

fail_count, test_count = doctest.testmod()

2329

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

1820

doctest.testmod()

1821

sys.exit()

2330

1822

2331

1823

# Default values for config file for server-global settings

2332

1824

server_defaults = { "interface": "",

2334

1826

"port": "",

2335

1827

"debug": "False",

2336

1828

"priority":

2337

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

1829

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

2338

1830

"servicename": "Mandos",

2339

1831

"use_dbus": "True",

2340

1832

"use_ipv6": "True",

2341

1833

"debuglevel": "",

2342

"restore": "True",

2343

"socket": "",

2344

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

2345

"foreground": "False",

2346

"zeroconf": "True",

2347

1834

}

2348

1835

2349

1836

# Parse config file for server-global settings

2354

1841

# Convert the SafeConfigParser object to a dict

2355

1842

server_settings = server_config.defaults()

2356

1843

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

2357

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

1844

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

2358

1845

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

2359

1846

option)

2360

1847

if server_settings["port"]:

2361

1848

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

2362

1849

"port")

2363

if server_settings["socket"]:

2364

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

2365

"socket")

2366

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

2367

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

2368

# happen with a supplied network socket.

2369

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

2370

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

2371

["socket"])

2372

1850

del server_config

2373

1851

2374

1852

# Override the settings from the config file with command line

2375

1853

# options, if set.

2376

1854

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

2377

1855

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

2378

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

2379

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

1856

"use_dbus", "use_ipv6", "debuglevel"):

2380

1857

value = getattr(options, option)

2381

1858

if value is not None:

2382

1859

server_settings[option] = value

2385

1862

for option in server_settings.keys():

2386

1863

if type(server_settings[option]) is str:

2387

1864

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

2388

# Force all boolean options to be boolean

2389

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

2390

"foreground", "zeroconf"):

2391

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

2392

# Debug implies foreground

2393

if server_settings["debug"]:

2394

server_settings["foreground"] = True

2395

1865

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

2396

1866

2397

1867

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

2398

1868

2399

if (not server_settings["zeroconf"] and

2400

not (server_settings["port"]

2401

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

2402

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

2403

" Zeroconf")

2404

2405

1869

# For convenience

2406

1870

debug = server_settings["debug"]

2407

1871

debuglevel = server_settings["debuglevel"]

2408

1872

use_dbus = server_settings["use_dbus"]

2409

1873

use_ipv6 = server_settings["use_ipv6"]

2410

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

2411

stored_state_file)

2412

foreground = server_settings["foreground"]

2413

zeroconf = server_settings["zeroconf"]

2414

2415

if debug:

2416

initlogger(debug, logging.DEBUG)

2417

else:

2418

if not debuglevel:

2419

initlogger(debug)

2420

else:

2421

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

2422

initlogger(debug, level)

2423

1874

2424

1875

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

2425

1876

syslogger.setFormatter(logging.Formatter

2426

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

2427

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

2428

.format(server_settings

2429

["servicename"])))

1877

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

1878

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

1879

% server_settings["servicename"]))

2430

1880

2431

1881

# Parse config file with clients

2432

client_config = configparser.SafeConfigParser(Client

2433

.client_defaults)

1882

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

1883

"extended_timeout": "15m",

1884

"interval": "2m",

1885

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

1886

"host": "",

1887

"approval_delay": "0s",

1888

"approval_duration": "1s",

1889

}

1890

client_config = configparser.SafeConfigParser(client_defaults)

2434

1891

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

2435

1892

"clients.conf"))

2436

1893

2437

1894

global mandos_dbus_service

2438

1895

mandos_dbus_service = None

2439

1896

2440

socketfd = None

2441

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

2442

socketfd = server_settings["socket"]

2443

1897

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

2444

1898

server_settings["port"]),

2445

1899

ClientHandler,

2448

1902

use_ipv6=use_ipv6,

2449

1903

gnutls_priority=

2450

1904

server_settings["priority"],

2451

use_dbus=use_dbus,

2452

socketfd=socketfd)

2453

if not foreground:

2454

pidfilename = "/run/mandos.pid"

2455

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

2456

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

2457

pidfile = None

1905

use_dbus=use_dbus)

1906

if not debug:

1907

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

2458

1908

try:

2459

1909

pidfile = open(pidfilename, "w")

2460

except IOError as e:

2461

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

2462

exc_info=e)

1910

except IOError:

1911

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

2463

1912

2464

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

1913

try:

1914

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

1915

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

1916

except KeyError:

2465

1917

try:

2466

uid = pwd.getpwnam(name).pw_uid

2467

gid = pwd.getpwnam(name).pw_gid

2468

break

1918

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

1919

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

2469

1920

except KeyError:

2470

continue

2471

else:

2472

uid = 65534

2473

gid = 65534

1921

try:

1922

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

1923

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

1924

except KeyError:

1925

uid = 65534

1926

gid = 65534

2474

1927

try:

2475

1928

os.setgid(gid)

2476

1929

os.setuid(uid)

2477

1930

except OSError as error:

2478

if error.errno != errno.EPERM:

2479

raise

1931

if error[0] != errno.EPERM:

1932

raise error

1933

1934

if not debug and not debuglevel:

1935

syslogger.setLevel(logging.WARNING)

1936

console.setLevel(logging.WARNING)

1937

if debuglevel:

1938

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

1939

syslogger.setLevel(level)

1940

console.setLevel(level)

2480

1941

2481

1942

if debug:

2482

1943

# Enable all possible GnuTLS debugging

2493

1954

.gnutls_global_set_log_function(debug_gnutls))

2494

1955

2495

1956

# Redirect stdin so all checkers get /dev/null

2496

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

1957

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

2497

1958

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

2498

1959

if null > 2:

2499

1960

os.close(null)

1961

else:

1962

# No console logging

1963

logger.removeHandler(console)

2500

1964

2501

1965

# Need to fork before connecting to D-Bus

2502

if not foreground:

1966

if not debug:

2503

1967

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

2504

1968

daemon()

2505

1969

2506

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

2507

# need to inform gobject that threads will be used.

2508

gobject.threads_init()

2509

2510

1970

global main_loop

2511

1971

# From the Avahi example code

2512

DBusGMainLoop(set_as_default=True)

1972

DBusGMainLoop(set_as_default=True )

2513

1973

main_loop = gobject.MainLoop()

2514

1974

bus = dbus.SystemBus()

2515

1975

# End of Avahi example code

2517

1977

try:

2518

1978

bus_name = dbus.service.BusName("se.recompile.Mandos",

2519

1979

bus, do_not_queue=True)

2520

old_bus_name = (dbus.service.BusName

2521

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

2522

do_not_queue=True))

1980

old_bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",

1981

bus, do_not_queue=True)

2523

1982

except dbus.exceptions.NameExistsException as e:

2524

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

1983

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

2525

1984

use_dbus = False

2526

1985

server_settings["use_dbus"] = False

2527

1986

tcp_server.use_dbus = False

2528

if zeroconf:

2529

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2530

service = AvahiServiceToSyslog(name =

2531

server_settings["servicename"],

2532

servicetype = "_mandos._tcp",

2533

protocol = protocol, bus = bus)

2534

if server_settings["interface"]:

2535

service.interface = (if_nametoindex

2536

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

1987

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1988

service = AvahiService(name = server_settings["servicename"],

1989

servicetype = "_mandos._tcp",

1990

protocol = protocol, bus = bus)

1991

if server_settings["interface"]:

1992

service.interface = (if_nametoindex

1993

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

2537

1994

2538

1995

global multiprocessing_manager

2539

1996

multiprocessing_manager = multiprocessing.Manager()

2540

1997

2541

1998

client_class = Client

2542

1999

if use_dbus:

2543

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

2544

2545

client_settings = Client.config_parser(client_config)

2546

old_client_settings = {}

2547

clients_data = {}

2548

2549

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

2550

global wnull

2551

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

2552

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

2553

# mode

2554

if debug or not foreground:

2555

wnull.close()

2556

2557

# Get client data and settings from last running state.

2558

if server_settings["restore"]:

2559

try:

2560

with open(stored_state_path, "rb") as stored_state:

2561

clients_data, old_client_settings = (pickle.load

2562

(stored_state))

2563

os.remove(stored_state_path)

2564

except IOError as e:

2565

if e.errno == errno.ENOENT:

2566

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

2567

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

2568

else:

2569

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

2570

exc_info=e)

2571

raise

2572

except EOFError as e:

2573

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

2574

"EOFError:", exc_info=e)

2575

2576

with PGPEngine() as pgp:

2577

for client_name, client in clients_data.items():

2578

# Skip removed clients

2579

if client_name not in client_settings:

2580

continue

2581

2582

# Decide which value to use after restoring saved state.

2583

# We have three different values: Old config file,

2584

# new config file, and saved state.

2585

# New config value takes precedence if it differs from old

2586

# config value, otherwise use saved state.

2587

for name, value in client_settings[client_name].items():

2588

try:

2589

# For each value in new config, check if it

2590

# differs from the old config value (Except for

2591

# the "secret" attribute)

2592

if (name != "secret" and

2593

value != old_client_settings[client_name]

2594

[name]):

2595

client[name] = value

2596

except KeyError:

2597

pass

2598

2599

# Clients who has passed its expire date can still be

2600

# enabled if its last checker was successful. Clients

2601

# whose checker succeeded before we stored its state is

2602

# assumed to have successfully run all checkers during

2603

# downtime.

2604

if client["enabled"]:

2605

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

2606

if not client["last_checked_ok"]:

2607

logger.warning(

2608

"disabling client {} - Client never "

2609

"performed a successful checker"

2610

.format(client_name))

2611

client["enabled"] = False

2612

elif client["last_checker_status"] != 0:

2613

logger.warning(

2614

"disabling client {} - Client last"

2615

" checker failed with error code {}"

2616

.format(client_name,

2617

client["last_checker_status"]))

2618

client["enabled"] = False

2619

else:

2620

client["expires"] = (datetime.datetime

2621

.utcnow()

2622

+ client["timeout"])

2623

logger.debug("Last checker succeeded,"

2624

" keeping {} enabled"

2625

.format(client_name))

2000

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

2001

def client_config_items(config, section):

2002

special_settings = {

2003

"approved_by_default":

2004

lambda: config.getboolean(section,

2005

"approved_by_default"),

2006

}

2007

for name, value in config.items(section):

2626

2008

try:

2627

client["secret"] = (

2628

pgp.decrypt(client["encrypted_secret"],

2629

client_settings[client_name]

2630

["secret"]))

2631

except PGPError:

2632

# If decryption fails, we use secret from new settings

2633

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

2634

.format(client_name))

2635

client["secret"] = (

2636

client_settings[client_name]["secret"])

2637

2638

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

2639

for client_name in (set(old_client_settings)

2640

- set(client_settings)):

2641

del clients_data[client_name]

2642

for client_name in (set(client_settings)

2643

- set(old_client_settings)):

2644

clients_data[client_name] = client_settings[client_name]

2645

2646

# Create all client objects

2647

for client_name, client in clients_data.items():

2648

tcp_server.clients[client_name] = client_class(

2649

name = client_name, settings = client,

2650

server_settings = server_settings)

2651

2009

yield (name, special_settings[name]())

2010

except KeyError:

2011

yield (name, value)

2012

2013

tcp_server.clients.update(set(

2014

client_class(name = section,

2015

config= dict(client_config_items(

2016

client_config, section)))

2017

for section in client_config.sections()))

2652

2018

if not tcp_server.clients:

2653

2019

logger.warning("No clients defined")

2654

2655

if not foreground:

2656

if pidfile is not None:

2657

try:

2658

with pidfile:

2659

pid = os.getpid()

2660

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

2661

except IOError:

2662

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

2663

pidfilename, pid)

2664

del pidfile

2020

2021

if not debug:

2022

try:

2023

with pidfile:

2024

pid = os.getpid()

2025

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

2026

del pidfile

2027

except IOError:

2028

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

2029

pidfilename, pid)

2030

except NameError:

2031

# "pidfile" was never created

2032

pass

2665

2033

del pidfilename

2034

2035

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

2666

2036

2667

2037

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

2668

2038

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

2669

2039

2670

2040

if use_dbus:

2671

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

2672

"se.bsnet.fukt.Mandos"})

2673

class MandosDBusService(DBusObjectWithProperties):

2041

class MandosDBusService(dbus.service.Object):

2674

2042

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

2675

2043

def __init__(self):

2676

2044

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

2677

2045

_interface = "se.recompile.Mandos"

2678

2046

2679

@dbus_interface_annotations(_interface)

2680

def _foo(self):

2681

return { "org.freedesktop.DBus.Property"

2682

".EmitsChangedSignal":

2683

"false"}

2684

2685

2047

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

2686

2048

def ClientAdded(self, objpath):

2687

2049

"D-Bus signal"

2701

2063

def GetAllClients(self):

2702

2064

"D-Bus method"

2703

2065

return dbus.Array(c.dbus_object_path

2704

for c in

2705

tcp_server.clients.itervalues())

2066

for c in tcp_server.clients)

2706

2067

2707

2068

@dbus.service.method(_interface,

2708

2069

out_signature="a{oa{sv}}")

2710

2071

"D-Bus method"

2711

2072

return dbus.Dictionary(

2712

2073

((c.dbus_object_path, c.GetAll(""))

2713

for c in tcp_server.clients.itervalues()),

2074

for c in tcp_server.clients),

2714

2075

signature="oa{sv}")

2715

2076

2716

2077

@dbus.service.method(_interface, in_signature="o")

2717

2078

def RemoveClient(self, object_path):

2718

2079

"D-Bus method"

2719

for c in tcp_server.clients.itervalues():

2080

for c in tcp_server.clients:

2720

2081

if c.dbus_object_path == object_path:

2721

del tcp_server.clients[c.name]

2082

tcp_server.clients.remove(c)

2722

2083

c.remove_from_connection()

2723

2084

# Don't signal anything except ClientRemoved

2724

2085

c.disable(quiet=True)

2729

2090

2730

2091

del _interface

2731

2092

2732

mandos_dbus_service = MandosDBusService()

2093

class MandosDBusServiceTransitional(MandosDBusService):

2094

__metaclass__ = AlternateDBusNamesMetaclass

2095

mandos_dbus_service = MandosDBusServiceTransitional()

2733

2096

2734

2097

def cleanup():

2735

2098

"Cleanup function; run on exit"

2736

if zeroconf:

2737

service.cleanup()

2738

2739

multiprocessing.active_children()

2740

wnull.close()

2741

if not (tcp_server.clients or client_settings):

2742

return

2743

2744

# Store client before exiting. Secrets are encrypted with key

2745

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

2746

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

2747

clients = {}

2748

with PGPEngine() as pgp:

2749

for client in tcp_server.clients.itervalues():

2750

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

2751

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

2752

key)

2753

client_dict = {}

2754

2755

# A list of attributes that can not be pickled

2756

# + secret.

2757

exclude = { "bus", "changedstate", "secret",

2758

"checker", "server_settings" }

2759

for name, typ in (inspect.getmembers

2760

(dbus.service.Object)):

2761

exclude.add(name)

2762

2763

client_dict["encrypted_secret"] = (client

2764

.encrypted_secret)

2765

for attr in client.client_structure:

2766

if attr not in exclude:

2767

client_dict[attr] = getattr(client, attr)

2768

2769

clients[client.name] = client_dict

2770

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

2771

2772

try:

2773

with (tempfile.NamedTemporaryFile

2774

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

2775

dir=os.path.dirname(stored_state_path),

2776

delete=False)) as stored_state:

2777

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

2778

tempname=stored_state.name

2779

os.rename(tempname, stored_state_path)

2780

except (IOError, OSError) as e:

2781

if not debug:

2782

try:

2783

os.remove(tempname)

2784

except NameError:

2785

pass

2786

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

2787

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

2788

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

2789

else:

2790

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

2791

exc_info=e)

2792

raise

2793

2794

# Delete all clients, and settings from config

2099

service.cleanup()

2100

2795

2101

while tcp_server.clients:

2796

name, client = tcp_server.clients.popitem()

2102

client = tcp_server.clients.pop()

2797

2103

if use_dbus:

2798

2104

client.remove_from_connection()

2105

client.disable_hook = None

2799

2106

# Don't signal anything except ClientRemoved

2800

2107

client.disable(quiet=True)

2801

2108

if use_dbus:

2802

2109

# Emit D-Bus signal

2803

mandos_dbus_service.ClientRemoved(client

2804

.dbus_object_path,

2110

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2805

2111

client.name)

2806

client_settings.clear()

2807

2112

2808

2113

atexit.register(cleanup)

2809

2114

2810

for client in tcp_server.clients.itervalues():

2115

for client in tcp_server.clients:

2811

2116

if use_dbus:

2812

2117

# Emit D-Bus signal

2813

2118

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2814

# Need to initiate checking of clients

2815

if client.enabled:

2816

client.init_checker()

2119

client.enable()

2817

2120

2818

2121

tcp_server.enable()

2819

2122

tcp_server.server_activate()

2820

2123

2821

2124

# Find out what port we got

2822

if zeroconf:

2823

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

2125

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

2824

2126

if use_ipv6:

2825

2127

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

2826

" flowinfo %d, scope_id %d",

2827

*tcp_server.socket.getsockname())

2128

" flowinfo %d, scope_id %d"

2129

% tcp_server.socket.getsockname())

2828

2130

else: # IPv4

2829

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

2830

*tcp_server.socket.getsockname())

2131

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

2132

% tcp_server.socket.getsockname())

2831

2133

2832

2134

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

2833

2135

2834

2136

try:

2835

if zeroconf:

2836

# From the Avahi example code

2837

try:

2838

service.activate()

2839

except dbus.exceptions.DBusException as error:

2840

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

2841

cleanup()

2842

sys.exit(1)

2843

# End of Avahi example code

2137

# From the Avahi example code

2138

try:

2139

service.activate()

2140

except dbus.exceptions.DBusException as error:

2141

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

2142

cleanup()

2143

sys.exit(1)

2144

# End of Avahi example code

2844

2145

2845

2146

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

2846

2147

lambda *args, **kwargs:

2850

2151

logger.debug("Starting main loop")

2851

2152

main_loop.run()

2852

2153

except AvahiError as error:

2853

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

2154

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

2854

2155

cleanup()

2855

2156

sys.exit(1)

2856

2157

except KeyboardInterrupt:

2861

2162

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

2862

2163

cleanup()

2863

2164

2165

2864

2166

if __name__ == '__main__':

2865

2167

main()