/mandos/release : revision 237.16.8

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* "browse_callback", and parts of "main".

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*

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* Everything else is

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13

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*

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

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* modify it under the terms of the GNU General Public License as

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#include <stdio.h> /* fprintf(), stderr, fwrite(),

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stdout, ferror(), remove() */

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#include <stdint.h> /* uint16_t, uint32_t, intptr_t */

44

#include <stdint.h> /* uint16_t, uint32_t */

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#include <stddef.h> /* NULL, size_t, ssize_t */

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#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),

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strtof(), abort() */

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*/

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#include <unistd.h> /* close(), SEEK_SET, off_t, write(),

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getuid(), getgid(), seteuid(),

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setgid(), pause(), _exit() */

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setgid(), pause() */

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#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */

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#include <iso646.h> /* not, or, and */

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#include <argp.h> /* struct argp_option, error_t, struct

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EX_NOHOST, EX_IOERR, EX_PROTOCOL */

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#include <sys/wait.h> /* waitpid(), WIFEXITED(),

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WEXITSTATUS(), WTERMSIG() */

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#include <grp.h> /* setgroups() */

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#ifdef __linux__

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#include <sys/klog.h> /* klogctl() */

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/* Function to use when printing errors */

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171

void perror_plus(const char *print_text){

173

int e = errno;

174

172

fprintf(stderr, "Mandos plugin %s: ",

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173

program_invocation_short_name);

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errno = e;

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perror(print_text);

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}

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__attribute__((format (gnu_printf, 2, 3)))

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int fprintf_plus(FILE *stream, const char *format, ...){

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va_list ap;

183

va_start (ap, format);

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TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",

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program_invocation_short_name));

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return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));

188

}

189

190

177

/*

191

178

* Make additional room in "buffer" for at least BUFFER_SIZE more

192

179

* bytes. "buffer_capacity" is how much is currently allocated,

205

192

}

206

193

207

194

/* Add server to set of servers to retry periodically */

208

bool add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,

209

int af){

195

int add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,

196

int af){

210

197

int ret;

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198

server *new_server = malloc(sizeof(server));

212

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if(new_server == NULL){

213

200

perror_plus("malloc");

214

return false;

201

return -1;

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202

}

216

203

*new_server = (server){ .ip = strdup(ip),

217

204

.port = port,

219

206

.af = af };

220

207

if(new_server->ip == NULL){

221

208

perror_plus("strdup");

222

return false;

209

return -1;

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210

}

224

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/* Special case of first server */

225

212

if (mc.current_server == NULL){

236

223

ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);

237

224

if(ret == -1){

238

225

perror_plus("clock_gettime");

239

return false;

226

return -1;

240

227

}

241

return true;

228

return 0;

242

229

}

243

230

244

231

/*

266

253

267

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rc = gpgme_data_new_from_fd(&pgp_data, fd);

268

255

if(rc != GPG_ERR_NO_ERROR){

269

fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",

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gpgme_strsource(rc), gpgme_strerror(rc));

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fprintf(stderr, "Mandos plugin mandos-client: "

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"bad gpgme_data_new_from_fd: %s: %s\n",

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gpgme_strsource(rc), gpgme_strerror(rc));

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259

return false;

272

260

}

273

261

274

262

rc = gpgme_op_import(mc.ctx, pgp_data);

275

263

if(rc != GPG_ERR_NO_ERROR){

276

fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",

277

gpgme_strsource(rc), gpgme_strerror(rc));

264

fprintf(stderr, "Mandos plugin mandos-client: "

265

"bad gpgme_op_import: %s: %s\n",

266

gpgme_strsource(rc), gpgme_strerror(rc));

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267

return false;

279

268

}

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269

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276

}

288

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if(debug){

290

fprintf_plus(stderr, "Initializing GPGME\n");

279

fprintf(stderr, "Mandos plugin mandos-client: "

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"Initializing GPGME\n");

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}

292

282

293

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/* Init GPGME */

294

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gpgme_check_version(NULL);

295

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rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);

296

286

if(rc != GPG_ERR_NO_ERROR){

297

fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",

298

gpgme_strsource(rc), gpgme_strerror(rc));

287

fprintf(stderr, "Mandos plugin mandos-client: "

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"bad gpgme_engine_check_version: %s: %s\n",

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gpgme_strsource(rc), gpgme_strerror(rc));

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290

return false;

300

291

}

301

292

302

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/* Set GPGME home directory for the OpenPGP engine only */

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rc = gpgme_get_engine_info(&engine_info);

304

295

if(rc != GPG_ERR_NO_ERROR){

305

fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",

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gpgme_strsource(rc), gpgme_strerror(rc));

296

fprintf(stderr, "Mandos plugin mandos-client: "

297

"bad gpgme_get_engine_info: %s: %s\n",

298

gpgme_strsource(rc), gpgme_strerror(rc));

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299

return false;

308

300

}

309

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while(engine_info != NULL){

315

307

engine_info = engine_info->next;

316

308

}

317

309

if(engine_info == NULL){

318

fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",

319

tempdir);

310

fprintf(stderr, "Mandos plugin mandos-client: "

311

"Could not set GPGME home dir to %s\n", tempdir);

320

312

return false;

321

313

}

322

314

323

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/* Create new GPGME "context" */

324

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rc = gpgme_new(&(mc.ctx));

325

317

if(rc != GPG_ERR_NO_ERROR){

326

fprintf_plus(stderr, "Mandos plugin mandos-client: "

327

"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),

328

gpgme_strerror(rc));

318

fprintf(stderr, "Mandos plugin mandos-client: "

319

"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),

320

gpgme_strerror(rc));

329

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return false;

330

322

}

331

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350

342

ssize_t plaintext_length = 0;

351

343

352

344

if(debug){

353

fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");

345

fprintf(stderr, "Mandos plugin mandos-client: "

346

"Trying to decrypt OpenPGP data\n");

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347

}

355

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356

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/* Create new GPGME data buffer from memory cryptotext */

357

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rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,

358

351

0);

359

352

if(rc != GPG_ERR_NO_ERROR){

360

fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",

361

gpgme_strsource(rc), gpgme_strerror(rc));

353

fprintf(stderr, "Mandos plugin mandos-client: "

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"bad gpgme_data_new_from_mem: %s: %s\n",

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gpgme_strsource(rc), gpgme_strerror(rc));

362

356

return -1;

363

357

}

364

358

365

359

/* Create new empty GPGME data buffer for the plaintext */

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rc = gpgme_data_new(&dh_plain);

367

361

if(rc != GPG_ERR_NO_ERROR){

368

fprintf_plus(stderr, "Mandos plugin mandos-client: "

369

"bad gpgme_data_new: %s: %s\n",

370

gpgme_strsource(rc), gpgme_strerror(rc));

362

fprintf(stderr, "Mandos plugin mandos-client: "

363

"bad gpgme_data_new: %s: %s\n",

364

gpgme_strsource(rc), gpgme_strerror(rc));

371

365

gpgme_data_release(dh_crypto);

372

366

return -1;

373

367

}

376

370

data buffer */

377

371

rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);

378

372

if(rc != GPG_ERR_NO_ERROR){

379

fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",

380

gpgme_strsource(rc), gpgme_strerror(rc));

373

fprintf(stderr, "Mandos plugin mandos-client: "

374

"bad gpgme_op_decrypt: %s: %s\n",

375

gpgme_strsource(rc), gpgme_strerror(rc));

381

376

plaintext_length = -1;

382

377

if(debug){

383

378

gpgme_decrypt_result_t result;

384

379

result = gpgme_op_decrypt_result(mc.ctx);

385

380

if(result == NULL){

386

fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");

381

fprintf(stderr, "Mandos plugin mandos-client: "

382

"gpgme_op_decrypt_result failed\n");

387

383

} else {

388

fprintf_plus(stderr, "Unsupported algorithm: %s\n",

389

result->unsupported_algorithm);

390

fprintf_plus(stderr, "Wrong key usage: %u\n",

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result->wrong_key_usage);

384

fprintf(stderr, "Mandos plugin mandos-client: "

385

"Unsupported algorithm: %s\n",

386

result->unsupported_algorithm);

387

fprintf(stderr, "Mandos plugin mandos-client: "

388

"Wrong key usage: %u\n",

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result->wrong_key_usage);

392

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if(result->file_name != NULL){

393

fprintf_plus(stderr, "File name: %s\n", result->file_name);

391

fprintf(stderr, "Mandos plugin mandos-client: "

392

"File name: %s\n", result->file_name);

394

393

}

395

394

gpgme_recipient_t recipient;

396

395

recipient = result->recipients;

397

396

while(recipient != NULL){

398

fprintf_plus(stderr, "Public key algorithm: %s\n",

399

gpgme_pubkey_algo_name

400

(recipient->pubkey_algo));

401

fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);

402

fprintf_plus(stderr, "Secret key available: %s\n",

403

recipient->status == GPG_ERR_NO_SECKEY

404

? "No" : "Yes");

397

fprintf(stderr, "Mandos plugin mandos-client: "

398

"Public key algorithm: %s\n",

399

gpgme_pubkey_algo_name(recipient->pubkey_algo));

400

fprintf(stderr, "Mandos plugin mandos-client: "

401

"Key ID: %s\n", recipient->keyid);

402

fprintf(stderr, "Mandos plugin mandos-client: "

403

"Secret key available: %s\n",

404

recipient->status == GPG_ERR_NO_SECKEY

405

? "No" : "Yes");

405

406

recipient = recipient->next;

406

407

}

407

408

}

410

411

}

411

412

413

if(debug){

413

fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");

414

fprintf(stderr, "Mandos plugin mandos-client: "

415

"Decryption of OpenPGP data succeeded\n");

414

416

}

415

417

416

418

/* Seek back to the beginning of the GPGME plaintext data buffer */

447

449

}

448

450

449

451

if(debug){

450

fprintf_plus(stderr, "Decrypted password is: ");

452

fprintf(stderr, "Mandos plugin mandos-client: "

453

"Decrypted password is: ");

451

454

for(ssize_t i = 0; i < plaintext_length; i++){

452

455

fprintf(stderr, "%02hhX ", (*plaintext)[i]);

453

456

}

475

478

/* GnuTLS log function callback */

476

479

static void debuggnutls(__attribute__((unused)) int level,

477

480

const char* string){

478

fprintf_plus(stderr, "GnuTLS: %s", string);

481

fprintf(stderr, "Mandos plugin mandos-client: GnuTLS: %s", string);

479

482

}

480

483

481

484

static int init_gnutls_global(const char *pubkeyfilename,

483

486

int ret;

484

487

485

488

if(debug){

486

fprintf_plus(stderr, "Initializing GnuTLS\n");

489

fprintf(stderr, "Mandos plugin mandos-client: "

490

"Initializing GnuTLS\n");

487

491

}

488

492

489

493

ret = gnutls_global_init();

490

494

if(ret != GNUTLS_E_SUCCESS){

491

fprintf_plus(stderr, "GnuTLS global_init: %s\n",

492

safer_gnutls_strerror(ret));

495

fprintf(stderr, "Mandos plugin mandos-client: "

496

"GnuTLS global_init: %s\n", safer_gnutls_strerror(ret));

493

497

return -1;

494

498

}

495

499

504

508

/* OpenPGP credentials */

505

509

ret = gnutls_certificate_allocate_credentials(&mc.cred);

506

510

if(ret != GNUTLS_E_SUCCESS){

507

fprintf_plus(stderr, "GnuTLS memory error: %s\n",

508

safer_gnutls_strerror(ret));

511

fprintf(stderr, "Mandos plugin mandos-client: "

512

"GnuTLS memory error: %s\n", safer_gnutls_strerror(ret));

509

513

gnutls_global_deinit();

510

514

return -1;

511

515

}

512

516

513

517

if(debug){

514

fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"

515

" secret key %s as GnuTLS credentials\n",

516

pubkeyfilename,

517

seckeyfilename);

518

fprintf(stderr, "Mandos plugin mandos-client: "

519

"Attempting to use OpenPGP public key %s and"

520

" secret key %s as GnuTLS credentials\n", pubkeyfilename,

521

seckeyfilename);

518

522

}

519

523

520

524

ret = gnutls_certificate_set_openpgp_key_file

521

525

(mc.cred, pubkeyfilename, seckeyfilename,

522

526

GNUTLS_OPENPGP_FMT_BASE64);

523

527

if(ret != GNUTLS_E_SUCCESS){

524

fprintf_plus(stderr,

525

"Error[%d] while reading the OpenPGP key pair ('%s',"

526

" '%s')\n", ret, pubkeyfilename, seckeyfilename);

527

fprintf_plus(stderr, "The GnuTLS error is: %s\n",

528

safer_gnutls_strerror(ret));

528

fprintf(stderr,

529

"Mandos plugin mandos-client: "

530

"Error[%d] while reading the OpenPGP key pair ('%s',"

531

" '%s')\n", ret, pubkeyfilename, seckeyfilename);

532

fprintf(stderr, "Mandos plugin mandos-client: "

533

"The GnuTLS error is: %s\n", safer_gnutls_strerror(ret));

529

534

goto globalfail;

530

535

}

531

536

532

537

/* GnuTLS server initialization */

533

538

ret = gnutls_dh_params_init(&mc.dh_params);

534

539

if(ret != GNUTLS_E_SUCCESS){

535

fprintf_plus(stderr, "Error in GnuTLS DH parameter"

536

" initialization: %s\n",

537

safer_gnutls_strerror(ret));

540

fprintf(stderr, "Mandos plugin mandos-client: "

541

"Error in GnuTLS DH parameter initialization:"

542

" %s\n", safer_gnutls_strerror(ret));

538

543

goto globalfail;

539

544

}

540

545

ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);

541

546

if(ret != GNUTLS_E_SUCCESS){

542

fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",

543

safer_gnutls_strerror(ret));

547

fprintf(stderr, "Mandos plugin mandos-client: "

548

"Error in GnuTLS prime generation: %s\n",

549

safer_gnutls_strerror(ret));

544

550

goto globalfail;

545

551

}

546

552

566

572

}

567

573

} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);

568

574

if(ret != GNUTLS_E_SUCCESS){

569

fprintf_plus(stderr,

570

"Error in GnuTLS session initialization: %s\n",

571

safer_gnutls_strerror(ret));

575

fprintf(stderr, "Mandos plugin mandos-client: "

576

"Error in GnuTLS session initialization: %s\n",

577

safer_gnutls_strerror(ret));

572

578

}

573

579

574

580

{

581

587

}

582

588

} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);

583

589

if(ret != GNUTLS_E_SUCCESS){

584

fprintf_plus(stderr, "Syntax error at: %s\n", err);

585

fprintf_plus(stderr, "GnuTLS error: %s\n",

586

safer_gnutls_strerror(ret));

590

fprintf(stderr, "Mandos plugin mandos-client: "

591

"Syntax error at: %s\n", err);

592

fprintf(stderr, "Mandos plugin mandos-client: "

593

"GnuTLS error: %s\n", safer_gnutls_strerror(ret));

587

594

gnutls_deinit(*session);

588

595

return -1;

589

596

}

598

605

}

599

606

} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);

600

607

if(ret != GNUTLS_E_SUCCESS){

601

fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",

602

safer_gnutls_strerror(ret));

608

fprintf(stderr, "Mandos plugin mandos-client: "

609

"Error setting GnuTLS credentials: %s\n",

610

safer_gnutls_strerror(ret));

603

611

gnutls_deinit(*session);

604

612

return -1;

605

613

}

650

658

pf = PF_INET;

651

659

break;

652

660

default:

653

fprintf_plus(stderr, "Bad address family: %d\n", af);

661

fprintf(stderr, "Mandos plugin mandos-client: "

662

"Bad address family: %d\n", af);

654

663

errno = EINVAL;

655

664

return -1;

656

665

}

661

670

}

662

671

663

672

if(debug){

664

fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"

665

PRIu16 "\n", ip, port);

673

fprintf(stderr, "Mandos plugin mandos-client: "

674

"Setting up a TCP connection to %s, port %" PRIu16

675

"\n", ip, port);

666

676

}

667

677

668

678

tcp_sd = socket(pf, SOCK_STREAM, 0);

694

704

}

695

705

if(ret == 0){

696

706

int e = errno;

697

fprintf_plus(stderr, "Bad address: %s\n", ip);

707

fprintf(stderr, "Mandos plugin mandos-client: "

708

"Bad address: %s\n", ip);

698

709

errno = e;

699

710

goto mandos_end;

700

711

}

707

718

(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and

708

719

-Wunreachable-code*/

709

720

if(if_index == AVAHI_IF_UNSPEC){

710

fprintf_plus(stderr, "An IPv6 link-local address is"

711

" incomplete without a network interface\n");

721

fprintf(stderr, "Mandos plugin mandos-client: "

722

"An IPv6 link-local address is incomplete"

723

" without a network interface\n");

712

724

errno = EINVAL;

713

725

goto mandos_end;

714

726

}

732

744

if(if_indextoname((unsigned int)if_index, interface) == NULL){

733

745

perror_plus("if_indextoname");

734

746

} else {

735

fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16

736

"\n", ip, interface, port);

747

fprintf(stderr, "Mandos plugin mandos-client: "

748

"Connection to: %s%%%s, port %" PRIu16 "\n",

749

ip, interface, port);

737

750

}

738

751

} else {

739

fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",

740

ip, port);

752

fprintf(stderr, "Mandos plugin mandos-client: "

753

"Connection to: %s, port %" PRIu16 "\n", ip, port);

741

754

}

742

755

char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?

743

756

INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";

753

766

perror_plus("inet_ntop");

754

767

} else {

755

768

if(strcmp(addrstr, ip) != 0){

756

fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);

769

fprintf(stderr, "Mandos plugin mandos-client: "

770

"Canonical address form: %s\n", addrstr);

757

771

}

758

772

}

759

773

}

813

827

}

814

828

815

829

if(debug){

816

fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);

830

fprintf(stderr, "Mandos plugin mandos-client: "

831

"Establishing TLS session with %s\n", ip);

817

832

}

818

833

819

834

if(quit_now){

821

836

goto mandos_end;

822

837

}

823

838

824

/* This casting via intptr_t is to eliminate warning about casting

825

an int to a pointer type. This is exactly how the GnuTLS Guile

826

function "set-session-transport-fd!" does it. */

827

gnutls_transport_set_ptr(session,

828

(gnutls_transport_ptr_t)(intptr_t)tcp_sd);

839

/* Spurious warning from -Wint-to-pointer-cast */

840

gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);

829

841

830

842

if(quit_now){

831

843

errno = EINTR;

842

854

843

855

if(ret != GNUTLS_E_SUCCESS){

844

856

if(debug){

845

fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");

857

fprintf(stderr, "Mandos plugin mandos-client: "

858

"*** GnuTLS Handshake failed ***\n");

846

859

gnutls_perror(ret);

847

860

}

848

861

errno = EPROTO;

852

865

/* Read OpenPGP packet that contains the wanted password */

853

866

854

867

if(debug){

855

fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"

856

" %s\n", ip);

868

fprintf(stderr, "Mandos plugin mandos-client: "

869

"Retrieving OpenPGP encrypted password from %s\n", ip);

857

870

}

858

871

859

872

while(true){

897

910

}

898

911

} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);

899

912

if(ret < 0){

900

fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "

901

"***\n");

913

fprintf(stderr, "Mandos plugin mandos-client: "

914

"*** GnuTLS Re-handshake failed ***\n");

902

915

gnutls_perror(ret);

903

916

errno = EPROTO;

904

917

goto mandos_end;

905

918

}

906

919

break;

907

920

default:

908

fprintf_plus(stderr, "Unknown error while reading data from"

909

" encrypted session with Mandos server\n");

921

fprintf(stderr, "Mandos plugin mandos-client: "

922

"Unknown error while reading data from"

923

" encrypted session with Mandos server\n");

910

924

gnutls_bye(session, GNUTLS_SHUT_RDWR);

911

925

errno = EIO;

912

926

goto mandos_end;

917

931

}

918

932

919

933

if(debug){

920

fprintf_plus(stderr, "Closing TLS session\n");

934

fprintf(stderr, "Mandos plugin mandos-client: "

935

"Closing TLS session\n");

921

936

}

922

937

923

938

if(quit_now){

952

967

if(ret == 0 and ferror(stdout)){

953

968

int e = errno;

954

969

if(debug){

955

fprintf_plus(stderr, "Error writing encrypted data: %s\n",

956

strerror(errno));

970

fprintf(stderr, "Mandos plugin mandos-client: "

971

"Error writing encrypted data: %s\n",

972

strerror(errno));

957

973

}

958

974

errno = e;

959

975

goto mandos_end;

1016

1032

switch(event){

1017

1033

default:

1018

1034

case AVAHI_RESOLVER_FAILURE:

1019

fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "

1020

"'%s' of type '%s' in domain '%s': %s\n", name, type,

1021

domain,

1022

avahi_strerror(avahi_server_errno(mc.server)));

1035

fprintf(stderr, "Mandos plugin mandos-client: "

1036

"(Avahi Resolver) Failed to resolve service '%s'"

1037

" of type '%s' in domain '%s': %s\n", name, type, domain,

1038

avahi_strerror(avahi_server_errno(mc.server)));

1023

1039

break;

1024

1040

1025

1041

case AVAHI_RESOLVER_FOUND:

1027

1043

char ip[AVAHI_ADDRESS_STR_MAX];

1028

1044

avahi_address_snprint(ip, sizeof(ip), address);

1029

1045

if(debug){

1030

fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"

1031

PRIdMAX ") on port %" PRIu16 "\n", name,

1032

host_name, ip, (intmax_t)interface, port);

1046

fprintf(stderr, "Mandos plugin mandos-client: "

1047

"Mandos server \"%s\" found on %s (%s, %"

1048

PRIdMAX ") on port %" PRIu16 "\n", name, host_name,

1049

ip, (intmax_t)interface, port);

1033

1050

}

1034

1051

int ret = start_mandos_communication(ip, port, interface,

1035

1052

avahi_proto_to_af(proto));

1036

1053

if(ret == 0){

1037

1054

avahi_simple_poll_quit(mc.simple_poll);

1038

1055

} else {

1039

if(not add_server(ip, port, interface,

1040

avahi_proto_to_af(proto))){

1041

fprintf_plus(stderr, "Failed to add server \"%s\" to server"

1042

" list\n", name);

1043

}

1056

ret = add_server(ip, port, interface,

1057

avahi_proto_to_af(proto));

1044

1058

}

1045

1059

}

1046

1060

}

1070

1084

default:

1071

1085

case AVAHI_BROWSER_FAILURE:

1072

1086

1073

fprintf_plus(stderr, "(Avahi browser) %s\n",

1074

avahi_strerror(avahi_server_errno(mc.server)));

1087

fprintf(stderr, "Mandos plugin mandos-client: "

1088

"(Avahi browser) %s\n",

1089

avahi_strerror(avahi_server_errno(mc.server)));

1075

1090

avahi_simple_poll_quit(mc.simple_poll);

1076

1091

return;

1077

1092

1084

1099

if(avahi_s_service_resolver_new(mc.server, interface, protocol,

1085

1100

name, type, domain, protocol, 0,

1086

1101

resolve_callback, NULL) == NULL)

1087

fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"

1088

" %s\n", name,

1089

avahi_strerror(avahi_server_errno(mc.server)));

1102

fprintf(stderr, "Mandos plugin mandos-client: "

1103

"Avahi: Failed to resolve service '%s': %s\n",

1104

name, avahi_strerror(avahi_server_errno(mc.server)));

1090

1105

break;

1091

1106

1092

1107

case AVAHI_BROWSER_REMOVE:

1095

1110

case AVAHI_BROWSER_ALL_FOR_NOW:

1096

1111

case AVAHI_BROWSER_CACHE_EXHAUSTED:

1097

1112

if(debug){

1098

fprintf_plus(stderr, "No Mandos server found, still"

1099

" searching...\n");

1113

fprintf(stderr, "Mandos plugin mandos-client: "

1114

"No Mandos server found, still searching...\n");

1100

1115

}

1101

1116

break;

1102

1117

}

1141

1156

/* Reject the loopback device */

1142

1157

if(ifr->ifr_flags & IFF_LOOPBACK){

1143

1158

if(debug){

1144

fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",

1145

ifname);

1159

fprintf(stderr, "Mandos plugin mandos-client: "

1160

"Rejecting loopback interface \"%s\"\n", ifname);

1146

1161

}

1147

1162

return false;

1148

1163

}

1149

1164

/* Accept point-to-point devices only if connect_to is specified */

1150

1165

if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){

1151

1166

if(debug){

1152

fprintf_plus(stderr, "Accepting point-to-point interface"

1153

" \"%s\"\n", ifname);

1167

fprintf(stderr, "Mandos plugin mandos-client: "

1168

"Accepting point-to-point interface \"%s\"\n", ifname);

1154

1169

}

1155

1170

return true;

1156

1171

}

1157

1172

/* Otherwise, reject non-broadcast-capable devices */

1158

1173

if(not (ifr->ifr_flags & IFF_BROADCAST)){

1159

1174

if(debug){

1160

fprintf_plus(stderr, "Rejecting non-broadcast interface"

1161

" \"%s\"\n", ifname);

1175

fprintf(stderr, "Mandos plugin mandos-client: "

1176

"Rejecting non-broadcast interface \"%s\"\n", ifname);

1162

1177

}

1163

1178

return false;

1164

1179

}

1165

1180

/* Reject non-ARP interfaces (including dummy interfaces) */

1166

1181

if(ifr->ifr_flags & IFF_NOARP){

1167

1182

if(debug){

1168

fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",

1169

ifname);

1183

fprintf(stderr, "Mandos plugin mandos-client: "

1184

"Rejecting non-ARP interface \"%s\"\n", ifname);

1170

1185

}

1171

1186

return false;

1172

1187

}

1173

1188

1174

1189

/* Accept this device */

1175

1190

if(debug){

1176

fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);

1191

fprintf(stderr, "Mandos plugin mandos-client: "

1192

"Interface \"%s\" is good\n", ifname);

1177

1193

}

1178

1194

return true;

1179

1195

}

1191

1207

struct ifreq ifr;

1192

1208

if(not get_flags(if_entry->d_name, &ifr)){

1193

1209

if(debug){

1194

fprintf_plus(stderr, "Failed to get flags for interface "

1195

"\"%s\"\n", if_entry->d_name);

1210

fprintf(stderr, "Mandos plugin mandos-client: "

1211

"Failed to get flags for interface \"%s\"\n",

1212

if_entry->d_name);

1196

1213

}

1197

1214

return 0;

1198

1215

}

1216

1233

struct ifreq ifr;

1217

1234

if(not get_flags(if_entry->d_name, &ifr)){

1218

1235

if(debug){

1219

fprintf_plus(stderr, "Failed to get flags for interface "

1220

"\"%s\"\n", if_entry->d_name);

1236

fprintf(stderr, "Mandos plugin mandos-client: "

1237

"Failed to get flags for interface \"%s\"\n",

1238

if_entry->d_name);

1221

1239

}

1222

1240

return 0;

1223

1241

}

1225

1243

/* Reject down interfaces */

1226

1244

if(not (ifr.ifr_flags & IFF_UP)){

1227

1245

if(debug){

1228

fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",

1229

if_entry->d_name);

1246

fprintf(stderr, "Mandos plugin mandos-client: "

1247

"Rejecting down interface \"%s\"\n",

1248

if_entry->d_name);

1230

1249

}

1231

1250

return 0;

1232

1251

}

1234

1253

/* Reject non-running interfaces */

1235

1254

if(not (ifr.ifr_flags & IFF_RUNNING)){

1236

1255

if(debug){

1237

fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",

1238

if_entry->d_name);

1256

fprintf(stderr, "Mandos plugin mandos-client: "

1257

"Rejecting non-running interface \"%s\"\n",

1258

if_entry->d_name);

1239

1259

}

1240

1260

return 0;

1241

1261

}

1275

1295

if((direntry->d_name)[sret] != '\0'){

1276

1296

/* Contains non-allowed characters */

1277

1297

if(debug){

1278

fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",

1279

direntry->d_name);

1298

fprintf(stderr, "Mandos plugin mandos-client: "

1299

"Ignoring hook \"%s\" with bad name\n",

1300

direntry->d_name);

1280

1301

}

1281

1302

return 0;

1282

1303

}

1298

1319

if(not (S_ISREG(st.st_mode))){

1299

1320

/* Not a regular file */

1300

1321

if(debug){

1301

fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",

1302

direntry->d_name);

1322

fprintf(stderr, "Mandos plugin mandos-client: "

1323

"Ignoring hook \"%s\" - not a file\n",

1324

direntry->d_name);

1303

1325

}

1304

1326

return 0;

1305

1327

}

1306

1328

if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){

1307

1329

/* Not executable */

1308

1330

if(debug){

1309

fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",

1310

direntry->d_name);

1331

fprintf(stderr, "Mandos plugin mandos-client: "

1332

"Ignoring hook \"%s\" - not executable\n",

1333

direntry->d_name);

1311

1334

}

1312

1335

return 0;

1313

1336

}

1314

if(debug){

1315

fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",

1316

direntry->d_name);

1317

}

1318

1337

return 1;

1319

1338

}

1320

1339

1327

1346

while(true){

1328

1347

if(mc.current_server == NULL){

1329

1348

if (debug){

1330

fprintf_plus(stderr, "Wait until first server is found."

1331

" No timeout!\n");

1349

fprintf(stderr, "Mandos plugin mandos-client: "

1350

"Wait until first server is found. No timeout!\n");

1332

1351

}

1333

1352

ret = avahi_simple_poll_iterate(s, -1);

1334

1353

} else {

1335

1354

if (debug){

1336

fprintf_plus(stderr, "Check current_server if we should run"

1337

" it, or wait\n");

1355

fprintf(stderr, "Mandos plugin mandos-client: "

1356

"Check current_server if we should run it,"

1357

" or wait\n");

1338

1358

}

1339

1359

/* the current time */

1340

1360

ret = clock_gettime(CLOCK_MONOTONIC, &now);

1356

1376

- ((intmax_t)waited_time.tv_nsec / 1000000));

1357

1377

1358

1378

if (debug){

1359

fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",

1360

block_time);

1379

fprintf(stderr, "Mandos plugin mandos-client: "

1380

"Blocking for %" PRIdMAX " ms\n", block_time);

1361

1381

}

1362

1382

1363

1383

if(block_time <= 0){

1402

1422

} else {

1403

1423

int devnull = open("/dev/null", O_RDONLY);

1404

1424

for(int i = 0; i < numhooks; i++){

1405

direntry = direntries[i];

1425

direntry = direntries[0];

1406

1426

char *fullname = NULL;

1407

1427

ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);

1408

1428

if(ret < 0){

1409

1429

perror_plus("asprintf");

1410

1430

continue;

1411

1431

}

1412

if(debug){

1413

fprintf_plus(stderr, "Running network hook \"%s\"\n",

1414

direntry->d_name);

1415

}

1416

1432

pid_t hook_pid = fork();

1417

1433

if(hook_pid == 0){

1418

1434

/* Child */

1419

/* Raise privileges */

1420

errno = 0;

1421

ret = seteuid(0);

1422

if(ret == -1){

1423

perror_plus("seteuid");

1424

}

1425

/* Raise privileges even more */

1426

errno = 0;

1427

ret = setuid(0);

1428

if(ret == -1){

1429

perror_plus("setuid");

1430

}

1431

/* Set group */

1432

errno = 0;

1433

ret = setgid(0);

1434

if(ret == -1){

1435

perror_plus("setgid");

1436

}

1437

/* Reset supplementary groups */

1438

errno = 0;

1439

ret = setgroups(0, NULL);

1440

if(ret == -1){

1441

perror_plus("setgroups");

1442

}

1443

1435

dup2(devnull, STDIN_FILENO);

1444

1436

close(devnull);

1445

1437

dup2(STDERR_FILENO, STDOUT_FILENO);

1446

1438

ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);

1447

1439

if(ret == -1){

1448

1440

perror_plus("setenv");

1449

_exit(EX_OSERR);

1441

return false;

1450

1442

}

1451

1443

ret = setenv("DEVICE", interface, 1);

1452

1444

if(ret == -1){

1453

1445

perror_plus("setenv");

1454

_exit(EX_OSERR);

1446

return false;

1455

1447

}

1456

ret = setenv("VERBOSITY", debug ? "1" : "0", 1);

1448

ret = setenv("VERBOSE", debug ? "1" : "0", 1);

1457

1449

if(ret == -1){

1458

1450

perror_plus("setenv");

1459

_exit(EX_OSERR);

1451

return false;

1460

1452

}

1461

1453

ret = setenv("MODE", mode, 1);

1462

1454

if(ret == -1){

1463

1455

perror_plus("setenv");

1464

_exit(EX_OSERR);

1456

return false;

1465

1457

}

1466

1458

char *delaystring;

1467

1459

ret = asprintf(&delaystring, "%f", delay);

1468

1460

if(ret == -1){

1469

1461

perror_plus("asprintf");

1470

_exit(EX_OSERR);

1462

return false;

1471

1463

}

1472

1464

ret = setenv("DELAY", delaystring, 1);

1473

1465

if(ret == -1){

1474

1466

free(delaystring);

1475

1467

perror_plus("setenv");

1476

_exit(EX_OSERR);

1468

return false;

1477

1469

}

1478

1470

free(delaystring);

1479

if(connect_to != NULL){

1480

ret = setenv("CONNECT", connect_to, 1);

1481

if(ret == -1){

1482

perror_plus("setenv");

1483

_exit(EX_OSERR);

1484

}

1485

}

1486

if(execl(fullname, direntry->d_name, mode, NULL) == -1){

1487

perror_plus("execl");

1488

_exit(EXIT_FAILURE);

1489

}

1471

ret = execl(fullname, direntry->d_name, mode, NULL);

1472

perror_plus("execl");

1490

1473

} else {

1491

1474

int status;

1492

1475

if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){

1496

1479

}

1497

1480

if(WIFEXITED(status)){

1498

1481

if(WEXITSTATUS(status) != 0){

1499

fprintf_plus(stderr, "Warning: network hook \"%s\" exited"

1500

" with status %d\n", direntry->d_name,

1501

WEXITSTATUS(status));

1482

fprintf(stderr, "Mandos plugin mandos-client: "

1483

"Warning: network hook \"%s\" exited"

1484

" with status %d\n", direntry->d_name,

1485

WEXITSTATUS(status));

1502

1486

free(fullname);

1503

1487

continue;

1504

1488

}

1505

1489

} else if(WIFSIGNALED(status)){

1506

fprintf_plus(stderr, "Warning: network hook \"%s\" died by"

1507

" signal %d\n", direntry->d_name,

1508

WTERMSIG(status));

1490

fprintf(stderr, "Mandos plugin mandos-client: "

1491

"Warning: network hook \"%s\" died by"

1492

" signal %d\n", direntry->d_name,

1493

WTERMSIG(status));

1509

1494

free(fullname);

1510

1495

continue;

1511

1496

} else {

1512

fprintf_plus(stderr, "Warning: network hook \"%s\""

1513

" crashed\n", direntry->d_name);

1497

fprintf(stderr, "Mandos plugin mandos-client: "

1498

"Warning: network hook \"%s\" crashed\n",

1499

direntry->d_name);

1514

1500

free(fullname);

1515

1501

continue;

1516

1502

}

1517

1503

}

1518

1504

free(fullname);

1519

if(debug){

1520

fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",

1521

direntry->d_name);

1505

if(quit_now){

1506

break;

1522

1507

}

1523

1508

}

1524

1509

close(devnull);

1611

1596

.group = 2 },

1612

1597

{ .name = "retry", .key = 132,

1613

1598

.arg = "SECONDS",

1614

.doc = "Retry interval used when denied by the Mandos server",

1599

.doc = "Retry interval used when denied by the mandos server",

1615

1600

.group = 2 },

1616

1601

{ .name = "network-hook-dir", .key = 133,

1617

1602

.arg = "DIR",

1689

1674

argp_state_help(state, state->out_stream,

1690

1675

ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);

1691

1676

case 'V': /* --version */

1692

fprintf_plus(state->out_stream, "%s\n", argp_program_version);

1677

fprintf(state->out_stream, "Mandos plugin mandos-client: ");

1678

fprintf(state->out_stream, "%s\n", argp_program_version);

1693

1679

exit(argp_err_exit_status);

1694

1680

break;

1695

1681

default:

1722

1708

{

1723

1709

/* Work around Debian bug #633582:

1724

1710

<http://bugs.debian.org/633582> */

1711

struct stat st;

1725

1712

1726

1713

/* Re-raise priviliges */

1727

1714

errno = 0;

1728

1715

ret = seteuid(0);

1729

1716

if(ret == -1){

1730

1717

perror_plus("seteuid");

1731

} else {

1732

struct stat st;

1733

1734

if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){

1735

int seckey_fd = open(seckey, O_RDONLY);

1736

if(seckey_fd == -1){

1737

perror_plus("open");

1738

} else {

1739

ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));

1740

if(ret == -1){

1741

perror_plus("fstat");

1742

} else {

1743

if(S_ISREG(st.st_mode)

1744

and st.st_uid == 0 and st.st_gid == 0){

1745

ret = fchown(seckey_fd, uid, gid);

1746

if(ret == -1){

1747

perror_plus("fchown");

1748

}

1749

}

1750

}

1751

TEMP_FAILURE_RETRY(close(seckey_fd));

1752

}

1753

}

1754

1755

if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){

1756

int pubkey_fd = open(pubkey, O_RDONLY);

1757

if(pubkey_fd == -1){

1758

perror_plus("open");

1759

} else {

1760

ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));

1761

if(ret == -1){

1762

perror_plus("fstat");

1763

} else {

1764

if(S_ISREG(st.st_mode)

1765

and st.st_uid == 0 and st.st_gid == 0){

1766

ret = fchown(pubkey_fd, uid, gid);

1767

if(ret == -1){

1768

perror_plus("fchown");

1769

}

1770

}

1771

}

1772

TEMP_FAILURE_RETRY(close(pubkey_fd));

1773

}

1774

}

1775

1776

/* Lower privileges */

1777

errno = 0;

1778

ret = seteuid(uid);

1779

if(ret == -1){

1780

perror_plus("seteuid");

1781

}

1718

}

1719

1720

if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){

1721

int seckey_fd = open(seckey, O_RDONLY);

1722

if(seckey_fd == -1){

1723

perror_plus("open");

1724

} else {

1725

ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));

1726

if(ret == -1){

1727

perror_plus("fstat");

1728

} else {

1729

if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){

1730

ret = fchown(seckey_fd, uid, gid);

1731

if(ret == -1){

1732

perror_plus("fchown");

1733

}

1734

}

1735

}

1736

TEMP_FAILURE_RETRY(close(seckey_fd));

1737

}

1738

}

1739

1740

if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){

1741

int pubkey_fd = open(pubkey, O_RDONLY);

1742

if(pubkey_fd == -1){

1743

perror_plus("open");

1744

} else {

1745

ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));

1746

if(ret == -1){

1747

perror_plus("fstat");

1748

} else {

1749

if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){

1750

ret = fchown(pubkey_fd, uid, gid);

1751

if(ret == -1){

1752

perror_plus("fchown");

1753

}

1754

}

1755

}

1756

TEMP_FAILURE_RETRY(close(pubkey_fd));

1757

}

1758

}

1759

1760

/* Lower privileges */

1761

errno = 0;

1762

ret = seteuid(uid);

1763

if(ret == -1){

1764

perror_plus("seteuid");

1782

1765

}

1783

1766

}

1784

1767

1785

1768

/* Run network hooks */

1786

if(not run_network_hooks("start", interface, delay)){

1787

goto end;

1769

{

1770

/* Re-raise priviliges */

1771

errno = 0;

1772

ret = seteuid(0);

1773

if(ret == -1){

1774

perror_plus("seteuid");

1775

}

1776

if(not run_network_hooks("start", interface, delay)){

1777

goto end;

1778

}

1779

/* Lower privileges */

1780

errno = 0;

1781

ret = seteuid(uid);

1782

if(ret == -1){

1783

perror_plus("seteuid");

1784

}

1788

1785

}

1789

1786

1790

1787

if(not debug){

1806

1803

/* Pick the first interface returned */

1807

1804

interface = strdup(direntries[0]->d_name);

1808

1805

if(debug){

1809

fprintf_plus(stderr, "Using interface \"%s\"\n", interface);

1806

fprintf(stderr, "Mandos plugin mandos-client: "

1807

"Using interface \"%s\"\n", interface);

1810

1808

}

1811

1809

if(interface == NULL){

1812

1810

perror_plus("malloc");

1817

1815

free(direntries);

1818

1816

} else {

1819

1817

free(direntries);

1820

fprintf_plus(stderr, "Could not find a network interface\n");

1818

fprintf(stderr, "Mandos plugin mandos-client: "

1819

"Could not find a network interface\n");

1821

1820

exitcode = EXIT_FAILURE;

1822

1821

goto end;

1823

1822

}

1829

1828

srand((unsigned int) time(NULL));

1830

1829

mc.simple_poll = avahi_simple_poll_new();

1831

1830

if(mc.simple_poll == NULL){

1832

fprintf_plus(stderr,

1833

"Avahi: Failed to create simple poll object.\n");

1831

fprintf(stderr, "Mandos plugin mandos-client: "

1832

"Avahi: Failed to create simple poll object.\n");

1834

1833

exitcode = EX_UNAVAILABLE;

1835

1834

goto end;

1836

1835

}

1902

1901

if(strcmp(interface, "none") != 0){

1903

1902

if_index = (AvahiIfIndex) if_nametoindex(interface);

1904

1903

if(if_index == 0){

1905

fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);

1904

fprintf(stderr, "Mandos plugin mandos-client: "

1905

"No such interface: \"%s\"\n", interface);

1906

exitcode = EX_UNAVAILABLE;

1907

goto end;

1908

}

2041

2042

ret = init_gnutls_global(pubkey, seckey);

2043

if(ret == -1){

2044

fprintf_plus(stderr, "init_gnutls_global failed\n");

2044

fprintf(stderr, "Mandos plugin mandos-client: "

2045

"init_gnutls_global failed\n");

2045

2046

exitcode = EX_UNAVAILABLE;

2046

2047

goto end;

2047

2048

} else {

2063

2064

}

2064

2065

2066

if(not init_gpgme(pubkey, seckey, tempdir)){

2066

fprintf_plus(stderr, "init_gpgme failed\n");

2067

fprintf(stderr, "Mandos plugin mandos-client: "

2068

"init_gpgme failed\n");

2067

2069

exitcode = EX_UNAVAILABLE;

2068

2070

goto end;

2069

2071

} else {

2079

2081

/* (Mainly meant for debugging) */

2080

2082

char *address = strrchr(connect_to, ':');

2081

2083

if(address == NULL){

2082

fprintf_plus(stderr, "No colon in address\n");

2084

fprintf(stderr, "Mandos plugin mandos-client: "

2085

"No colon in address\n");

2083

2086

exitcode = EX_USAGE;

2084

2087

goto end;

2085

2088

}

2093

2096

tmpmax = strtoimax(address+1, &tmp, 10);

2094

2097

if(errno != 0 or tmp == address+1 or *tmp != '\0'

2095

2098

or tmpmax != (uint16_t)tmpmax){

2096

fprintf_plus(stderr, "Bad port number\n");

2099

fprintf(stderr, "Mandos plugin mandos-client: "

2100

"Bad port number\n");

2097

2101

exitcode = EX_USAGE;

2098

2102

goto end;

2099

2103

}

2129

2133

break;

2130

2134

}

2131

2135

if(debug){

2132

fprintf_plus(stderr, "Retrying in %d seconds\n",

2133

(int)retry_interval);

2136

fprintf(stderr, "Mandos plugin mandos-client: "

2137

"Retrying in %d seconds\n", (int)retry_interval);

2134

2138

}

2135

2139

sleep((int)retry_interval);

2136

2140

}

2166

2170

2167

2171

/* Check if creating the Avahi server object succeeded */

2168

2172

if(mc.server == NULL){

2169

fprintf_plus(stderr, "Failed to create Avahi server: %s\n",

2170

avahi_strerror(error));

2173

fprintf(stderr, "Mandos plugin mandos-client: "

2174

"Failed to create Avahi server: %s\n",

2175

avahi_strerror(error));

2171

2176

exitcode = EX_UNAVAILABLE;

2172

2177

goto end;

2173

2178

}

2181

2186

AVAHI_PROTO_UNSPEC, "_mandos._tcp",

2182

2187

NULL, 0, browse_callback, NULL);

2183

2188

if(sb == NULL){

2184

fprintf_plus(stderr, "Failed to create service browser: %s\n",

2185

avahi_strerror(avahi_server_errno(mc.server)));

2189

fprintf(stderr, "Mandos plugin mandos-client: "

2190

"Failed to create service browser: %s\n",

2191

avahi_strerror(avahi_server_errno(mc.server)));

2186

2192

exitcode = EX_UNAVAILABLE;

2187

2193

goto end;

2188

2194

}

2194

2200

/* Run the main loop */

2195

2201

2196

2202

if(debug){

2197

fprintf_plus(stderr, "Starting Avahi loop search\n");

2203

fprintf(stderr, "Mandos plugin mandos-client: "

2204

"Starting Avahi loop search\n");

2198

2205

}

2199

2206

2200

2207

ret = avahi_loop_with_timeout(mc.simple_poll,

2201

2208

(int)(retry_interval * 1000));

2202

2209

if(debug){

2203

fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",

2204

(ret == 0) ? "successfully" : "with error");

2210

fprintf(stderr, "Mandos plugin mandos-client: "

2211

"avahi_loop_with_timeout exited %s\n",

2212

(ret == 0) ? "successfully" : "with error");

2205

2213

}

2206

2214

2207

2215

end:

2208

2216

2209

2217

if(debug){

2210

fprintf_plus(stderr, "%s exiting\n", argv[0]);

2218

fprintf(stderr, "Mandos plugin mandos-client: "

2219

"%s exiting\n", argv[0]);

2211

2220

}

2212

2221

2213

2222

/* Cleanup things */

2229

2238

if(gpgme_initialized){

2230

2239

gpgme_release(mc.ctx);

2231

2240

}

2232

2241

2233

2242

/* Cleans up the circular linked list of Mandos servers the client

2234

2243

has seen */

2235

2244

if(mc.current_server != NULL){

2241

2250

}

2242

2251

}

2243

2252

2244

/* Run network hooks */

2245

run_network_hooks("stop", interface, delay);

2246

2247

2253

/* Re-raise priviliges */

2248

2254

{

2249

2255

errno = 0;

2251

2257

if(ret == -1){

2252

2258

perror_plus("seteuid");

2253

2259

}

2260

/* Run network hooks */

2261

if(not run_network_hooks("stop", interface, delay)){

2262

goto end;

2263

}

2254

2264

2255

2265

/* Take down the network interface */

2256

2266

if(take_down_interface and geteuid() == 0){

2295

2305

}

2296

2306

ret = remove(fullname);

2297

2307

if(ret == -1){

2298

fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,

2299

strerror(errno));

2308

fprintf(stderr, "Mandos plugin mandos-client: "

2309

"remove(\"%s\"): %s\n", fullname, strerror(errno));

2300

2310

}

2301

2311

free(fullname);

2302

2312

}