/mandos/trunk : revision 237.4.32

9

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

10

*

11

* Everything else is

12

13

12

13

14

*

15

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

16

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

41

42

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

43

stdout, ferror(), remove() */

44

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

44

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

45

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

46

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

47

strtof(), abort() */

73

*/

74

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

75

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

76

setgid(), pause() */

76

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

77

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

78

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

79

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

87

EX_NOHOST, EX_IOERR, EX_PROTOCOL */

88

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

89

WEXITSTATUS(), WTERMSIG() */

90

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

90

91

92

#ifdef __linux__

92

93

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

169

170

171

/* Function to use when printing errors */

171

172

void perror_plus(const char *print_text){

173

int e = errno;

172

174

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

173

175

program_invocation_short_name);

176

errno = e;

174

177

perror(print_text);

175

178

}

176

179

180

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

181

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

182

va_list ap;

183

va_start (ap, format);

184

185

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

186

program_invocation_short_name));

187

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

188

}

189

177

190

/*

178

191

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

179

192

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

192

205

}

193

206

194

207

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

195

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

196

int af){

208

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

209

int af){

197

210

int ret;

198

211

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

199

212

if(new_server == NULL){

200

213

perror_plus("malloc");

201

return -1;

214

return false;

202

215

}

203

216

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

204

217

.port = port,

206

219

.af = af };

207

220

if(new_server->ip == NULL){

208

221

perror_plus("strdup");

209

return -1;

222

return false;

210

223

}

211

224

/* Special case of first server */

212

225

if (mc.current_server == NULL){

223

236

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

224

237

if(ret == -1){

225

238

perror_plus("clock_gettime");

226

return -1;

239

return false;

227

240

}

228

return 0;

241

return true;

229

242

}

230

243

231

244

/*

253

266

254

267

rc = gpgme_data_new_from_fd(&pgp_data, fd);

255

268

if(rc != GPG_ERR_NO_ERROR){

256

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

257

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

258

gpgme_strsource(rc), gpgme_strerror(rc));

269

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

270

gpgme_strsource(rc), gpgme_strerror(rc));

259

271

return false;

260

272

}

261

273

262

274

rc = gpgme_op_import(mc.ctx, pgp_data);

263

275

if(rc != GPG_ERR_NO_ERROR){

264

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

265

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

266

gpgme_strsource(rc), gpgme_strerror(rc));

276

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

277

gpgme_strsource(rc), gpgme_strerror(rc));

267

278

return false;

268

279

}

269

280

276

287

}

277

288

278

289

if(debug){

279

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

280

"Initializing GPGME\n");

290

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

281

291

}

282

292

283

293

/* Init GPGME */

284

294

gpgme_check_version(NULL);

285

295

rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);

286

296

if(rc != GPG_ERR_NO_ERROR){

287

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

288

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

289

gpgme_strsource(rc), gpgme_strerror(rc));

297

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

298

gpgme_strsource(rc), gpgme_strerror(rc));

290

299

return false;

291

300

}

292

301

293

302

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

294

303

rc = gpgme_get_engine_info(&engine_info);

295

304

if(rc != GPG_ERR_NO_ERROR){

296

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

297

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

298

gpgme_strsource(rc), gpgme_strerror(rc));

305

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

306

gpgme_strsource(rc), gpgme_strerror(rc));

299

307

return false;

300

308

}

301

309

while(engine_info != NULL){

307

315

engine_info = engine_info->next;

308

316

}

309

317

if(engine_info == NULL){

310

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

311

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

318

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

319

tempdir);

312

320

return false;

313

321

}

314

322

315

323

/* Create new GPGME "context" */

316

324

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

317

325

if(rc != GPG_ERR_NO_ERROR){

318

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

319

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

320

gpgme_strerror(rc));

326

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

327

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

328

gpgme_strerror(rc));

321

329

return false;

322

330

}

323

331

342

350

ssize_t plaintext_length = 0;

343

351

344

352

if(debug){

345

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

346

"Trying to decrypt OpenPGP data\n");

353

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

347

354

}

348

355

349

356

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

350

357

rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,

351

358

0);

352

359

if(rc != GPG_ERR_NO_ERROR){

353

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

354

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

355

gpgme_strsource(rc), gpgme_strerror(rc));

360

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

361

gpgme_strsource(rc), gpgme_strerror(rc));

356

362

return -1;

357

363

}

358

364

359

365

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

360

366

rc = gpgme_data_new(&dh_plain);

361

367

if(rc != GPG_ERR_NO_ERROR){

362

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

363

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

364

gpgme_strsource(rc), gpgme_strerror(rc));

368

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

369

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

370

gpgme_strsource(rc), gpgme_strerror(rc));

365

371

gpgme_data_release(dh_crypto);

366

372

return -1;

367

373

}

370

376

data buffer */

371

377

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

372

378

if(rc != GPG_ERR_NO_ERROR){

373

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

374

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

375

gpgme_strsource(rc), gpgme_strerror(rc));

379

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

380

gpgme_strsource(rc), gpgme_strerror(rc));

376

381

plaintext_length = -1;

377

382

if(debug){

378

383

gpgme_decrypt_result_t result;

379

384

result = gpgme_op_decrypt_result(mc.ctx);

380

385

if(result == NULL){

381

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

382

"gpgme_op_decrypt_result failed\n");

386

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

383

387

} else {

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",

389

result->wrong_key_usage);

388

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

389

result->unsupported_algorithm);

390

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

391

result->wrong_key_usage);

390

392

if(result->file_name != NULL){

391

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

392

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

393

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

393

394

}

394

395

gpgme_recipient_t recipient;

395

396

recipient = result->recipients;

396

397

while(recipient != NULL){

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");

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");

406

405

recipient = recipient->next;

407

406

}

408

407

}

411

410

}

412

411

413

412

if(debug){

414

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

415

"Decryption of OpenPGP data succeeded\n");

413

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

416

414

}

417

415

418

416

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

449

447

}

450

448

451

449

if(debug){

452

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

453

"Decrypted password is: ");

450

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

454

451

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

455

452

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

456

453

}

478

475

/* GnuTLS log function callback */

479

476

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

480

477

const char* string){

481

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

478

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

482

479

}

483

480

484

481

static int init_gnutls_global(const char *pubkeyfilename,

486

483

int ret;

487

484

488

485

if(debug){

489

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

490

"Initializing GnuTLS\n");

486

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

491

487

}

492

488

493

489

ret = gnutls_global_init();

494

490

if(ret != GNUTLS_E_SUCCESS){

495

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

496

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

491

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

492

safer_gnutls_strerror(ret));

497

493

return -1;

498

494

}

499

495

508

504

/* OpenPGP credentials */

509

505

ret = gnutls_certificate_allocate_credentials(&mc.cred);

510

506

if(ret != GNUTLS_E_SUCCESS){

511

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

512

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

507

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

508

safer_gnutls_strerror(ret));

513

509

gnutls_global_deinit();

514

510

return -1;

515

511

}

516

512

517

513

if(debug){

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);

514

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

515

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

516

pubkeyfilename,

517

seckeyfilename);

522

518

}

523

519

524

520

ret = gnutls_certificate_set_openpgp_key_file

525

521

(mc.cred, pubkeyfilename, seckeyfilename,

526

522

GNUTLS_OPENPGP_FMT_BASE64);

527

523

if(ret != GNUTLS_E_SUCCESS){

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));

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));

534

529

goto globalfail;

535

530

}

536

531

537

532

/* GnuTLS server initialization */

538

533

ret = gnutls_dh_params_init(&mc.dh_params);

539

534

if(ret != GNUTLS_E_SUCCESS){

540

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

541

"Error in GnuTLS DH parameter initialization:"

542

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

535

fprintf_plus(stderr, "Error in GnuTLS DH parameter"

536

" initialization: %s\n",

537

safer_gnutls_strerror(ret));

543

538

goto globalfail;

544

539

}

545

540

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

546

541

if(ret != GNUTLS_E_SUCCESS){

547

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

548

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

549

safer_gnutls_strerror(ret));

542

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

543

safer_gnutls_strerror(ret));

550

544

goto globalfail;

551

545

}

552

546

572

566

}

573

567

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

574

568

if(ret != GNUTLS_E_SUCCESS){

575

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

576

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

577

safer_gnutls_strerror(ret));

569

fprintf_plus(stderr,

570

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

571

safer_gnutls_strerror(ret));

578

572

}

579

573

580

574

{

587

581

}

588

582

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

589

583

if(ret != GNUTLS_E_SUCCESS){

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));

584

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

585

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

586

safer_gnutls_strerror(ret));

594

587

gnutls_deinit(*session);

595

588

return -1;

596

589

}

605

598

}

606

599

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

607

600

if(ret != GNUTLS_E_SUCCESS){

608

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

609

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

610

safer_gnutls_strerror(ret));

601

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

602

safer_gnutls_strerror(ret));

611

603

gnutls_deinit(*session);

612

604

return -1;

613

605

}

658

650

pf = PF_INET;

659

651

break;

660

652

default:

661

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

662

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

653

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

663

654

errno = EINVAL;

664

655

return -1;

665

656

}

670

661

}

671

662

672

663

if(debug){

673

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

674

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

675

"\n", ip, port);

664

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

665

PRIu16 "\n", ip, port);

676

666

}

677

667

678

668

tcp_sd = socket(pf, SOCK_STREAM, 0);

704

694

}

705

695

if(ret == 0){

706

696

int e = errno;

707

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

708

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

697

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

709

698

errno = e;

710

699

goto mandos_end;

711

700

}

718

707

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

719

708

-Wunreachable-code*/

720

709

if(if_index == AVAHI_IF_UNSPEC){

721

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

722

"An IPv6 link-local address is incomplete"

723

" without a network interface\n");

710

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

711

" incomplete without a network interface\n");

724

712

errno = EINVAL;

725

713

goto mandos_end;

726

714

}

744

732

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

745

733

perror_plus("if_indextoname");

746

734

} else {

747

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

748

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

749

ip, interface, port);

735

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

736

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

750

737

}

751

738

} else {

752

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

753

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

739

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

740

ip, port);

754

741

}

755

742

char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?

756

743

INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";

766

753

perror_plus("inet_ntop");

767

754

} else {

768

755

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

769

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

770

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

756

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

771

757

}

772

758

}

773

759

}

827

813

}

828

814

829

815

if(debug){

830

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

831

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

816

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

832

817

}

833

818

834

819

if(quit_now){

836

821

goto mandos_end;

837

822

}

838

823

839

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

840

gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);

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);

841

829

842

830

if(quit_now){

843

831

errno = EINTR;

854

842

855

843

if(ret != GNUTLS_E_SUCCESS){

856

844

if(debug){

857

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

858

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

845

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

859

846

gnutls_perror(ret);

860

847

}

861

848

errno = EPROTO;

865

852

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

866

853

867

854

if(debug){

868

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

869

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

855

fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"

856

" %s\n", ip);

870

857

}

871

858

872

859

while(true){

910

897

}

911

898

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

912

899

if(ret < 0){

913

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

914

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

900

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

901

"***\n");

915

902

gnutls_perror(ret);

916

903

errno = EPROTO;

917

904

goto mandos_end;

918

905

}

919

906

break;

920

907

default:

921

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

922

"Unknown error while reading data from"

923

" encrypted session with Mandos server\n");

908

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

909

" encrypted session with Mandos server\n");

924

910

gnutls_bye(session, GNUTLS_SHUT_RDWR);

925

911

errno = EIO;

926

912

goto mandos_end;

931

917

}

932

918

933

919

if(debug){

934

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

935

"Closing TLS session\n");

920

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

936

921

}

937

922

938

923

if(quit_now){

967

952

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

968

953

int e = errno;

969

954

if(debug){

970

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

971

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

972

strerror(errno));

955

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

956

strerror(errno));

973

957

}

974

958

errno = e;

975

959

goto mandos_end;

1032

1016

switch(event){

1033

1017

default:

1034

1018

case AVAHI_RESOLVER_FAILURE:

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)));

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)));

1039

1023

break;

1040

1024

1041

1025

case AVAHI_RESOLVER_FOUND:

1043

1027

char ip[AVAHI_ADDRESS_STR_MAX];

1044

1028

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

1045

1029

if(debug){

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);

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);

1050

1033

}

1051

1034

int ret = start_mandos_communication(ip, port, interface,

1052

1035

avahi_proto_to_af(proto));

1053

1036

if(ret == 0){

1054

1037

avahi_simple_poll_quit(mc.simple_poll);

1055

1038

} else {

1056

ret = add_server(ip, port, interface,

1057

avahi_proto_to_af(proto));

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

}

1058

1044

}

1059

1045

}

1060

1046

}

1084

1070

default:

1085

1071

case AVAHI_BROWSER_FAILURE:

1086

1072

1087

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

1088

"(Avahi browser) %s\n",

1089

avahi_strerror(avahi_server_errno(mc.server)));

1073

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

1074

avahi_strerror(avahi_server_errno(mc.server)));

1090

1075

avahi_simple_poll_quit(mc.simple_poll);

1091

1076

return;

1092

1077

1099

1084

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

1100

1085

name, type, domain, protocol, 0,

1101

1086

resolve_callback, NULL) == NULL)

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)));

1087

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

1088

" %s\n", name,

1089

avahi_strerror(avahi_server_errno(mc.server)));

1105

1090

break;

1106

1091

1107

1092

case AVAHI_BROWSER_REMOVE:

1110

1095

case AVAHI_BROWSER_ALL_FOR_NOW:

1111

1096

case AVAHI_BROWSER_CACHE_EXHAUSTED:

1112

1097

if(debug){

1113

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

1114

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

1098

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

1099

" searching...\n");

1115

1100

}

1116

1101

break;

1117

1102

}

1156

1141

/* Reject the loopback device */

1157

1142

if(ifr->ifr_flags & IFF_LOOPBACK){

1158

1143

if(debug){

1159

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

1160

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

1144

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

1145

ifname);

1161

1146

}

1162

1147

return false;

1163

1148

}

1164

1149

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

1165

1150

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

1166

1151

if(debug){

1167

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

1168

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

1152

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

1153

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

1169

1154

}

1170

1155

return true;

1171

1156

}

1172

1157

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

1173

1158

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

1174

1159

if(debug){

1175

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

1176

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

1160

fprintf_plus(stderr, "Rejecting non-broadcast interface"

1161

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

1177

1162

}

1178

1163

return false;

1179

1164

}

1180

1165

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

1181

1166

if(ifr->ifr_flags & IFF_NOARP){

1182

1167

if(debug){

1183

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

1184

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

1168

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

1169

ifname);

1185

1170

}

1186

1171

return false;

1187

1172

}

1188

1173

1189

1174

/* Accept this device */

1190

1175

if(debug){

1191

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

1192

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

1176

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

1193

1177

}

1194

1178

return true;

1195

1179

}

1207

1191

struct ifreq ifr;

1208

1192

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

1209

1193

if(debug){

1210

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

1211

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

1212

if_entry->d_name);

1194

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

1195

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

1213

1196

}

1214

1197

return 0;

1215

1198

}

1233

1216

struct ifreq ifr;

1234

1217

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

1235

1218

if(debug){

1236

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

1237

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

1238

if_entry->d_name);

1219

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

1220

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

1239

1221

}

1240

1222

return 0;

1241

1223

}

1243

1225

/* Reject down interfaces */

1244

1226

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

1245

1227

if(debug){

1246

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

1247

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

1248

if_entry->d_name);

1228

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

1229

if_entry->d_name);

1249

1230

}

1250

1231

return 0;

1251

1232

}

1253

1234

/* Reject non-running interfaces */

1254

1235

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

1255

1236

if(debug){

1256

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

1257

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

1258

if_entry->d_name);

1237

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

1238

if_entry->d_name);

1259

1239

}

1260

1240

return 0;

1261

1241

}

1295

1275

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

1296

1276

/* Contains non-allowed characters */

1297

1277

if(debug){

1298

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

1299

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

1300

direntry->d_name);

1278

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

1279

direntry->d_name);

1301

1280

}

1302

1281

return 0;

1303

1282

}

1319

1298

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

1320

1299

/* Not a regular file */

1321

1300

if(debug){

1322

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

1323

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

1324

direntry->d_name);

1301

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

1302

direntry->d_name);

1325

1303

}

1326

1304

return 0;

1327

1305

}

1328

1306

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

1329

1307

/* Not executable */

1330

1308

if(debug){

1331

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

1332

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

1333

direntry->d_name);

1309

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

1310

direntry->d_name);

1334

1311

}

1335

1312

return 0;

1336

1313

}

1314

if(debug){

1315

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

1316

direntry->d_name);

1317

}

1337

1318

return 1;

1338

1319

}

1339

1320

1346

1327

while(true){

1347

1328

if(mc.current_server == NULL){

1348

1329

if (debug){

1349

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

1350

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

1330

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

1331

" No timeout!\n");

1351

1332

}

1352

1333

ret = avahi_simple_poll_iterate(s, -1);

1353

1334

} else {

1354

1335

if (debug){

1355

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

1356

"Check current_server if we should run it,"

1357

" or wait\n");

1336

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

1337

" it, or wait\n");

1358

1338

}

1359

1339

/* the current time */

1360

1340

ret = clock_gettime(CLOCK_MONOTONIC, &now);

1376

1356

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

1377

1357

1378

1358

if (debug){

1379

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

1380

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

1359

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

1360

block_time);

1381

1361

}

1382

1362

1383

1363

if(block_time <= 0){

1422

1402

} else {

1423

1403

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

1424

1404

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

1425

direntry = direntries[0];

1405

direntry = direntries[i];

1426

1406

char *fullname = NULL;

1427

1407

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

1428

1408

if(ret < 0){

1429

1409

perror_plus("asprintf");

1430

1410

continue;

1431

1411

}

1412

if(debug){

1413

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

1414

direntry->d_name);

1415

}

1432

1416

pid_t hook_pid = fork();

1433

1417

if(hook_pid == 0){

1434

1418

/* 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

}

1435

1443

dup2(devnull, STDIN_FILENO);

1436

1444

close(devnull);

1437

1445

dup2(STDERR_FILENO, STDOUT_FILENO);

1438

1446

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

1439

1447

if(ret == -1){

1440

1448

perror_plus("setenv");

1441

return false;

1449

_exit(EX_OSERR);

1442

1450

}

1443

1451

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

1444

1452

if(ret == -1){

1445

1453

perror_plus("setenv");

1446

return false;

1454

_exit(EX_OSERR);

1447

1455

}

1448

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

1456

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

1449

1457

if(ret == -1){

1450

1458

perror_plus("setenv");

1451

return false;

1459

_exit(EX_OSERR);

1452

1460

}

1453

1461

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

1454

1462

if(ret == -1){

1455

1463

perror_plus("setenv");

1456

return false;

1464

_exit(EX_OSERR);

1457

1465

}

1458

1466

char *delaystring;

1459

1467

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

1460

1468

if(ret == -1){

1461

1469

perror_plus("asprintf");

1462

return false;

1470

_exit(EX_OSERR);

1463

1471

}

1464

1472

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

1465

1473

if(ret == -1){

1466

1474

free(delaystring);

1467

1475

perror_plus("setenv");

1468

return false;

1476

_exit(EX_OSERR);

1469

1477

}

1470

1478

free(delaystring);

1471

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

1472

perror_plus("execl");

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

}

1473

1490

} else {

1474

1491

int status;

1475

1492

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

1479

1496

}

1480

1497

if(WIFEXITED(status)){

1481

1498

if(WEXITSTATUS(status) != 0){

1482

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

1483

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

1484

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

1485

WEXITSTATUS(status));

1499

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

1500

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

1501

WEXITSTATUS(status));

1486

1502

free(fullname);

1487

1503

continue;

1488

1504

}

1489

1505

} else if(WIFSIGNALED(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));

1506

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

1507

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

1508

WTERMSIG(status));

1494

1509

free(fullname);

1495

1510

continue;

1496

1511

} else {

1497

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

1498

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

1499

direntry->d_name);

1512

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

1513

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

1500

1514

free(fullname);

1501

1515

continue;

1502

1516

}

1503

1517

}

1504

1518

free(fullname);

1505

if(quit_now){

1506

break;

1519

if(debug){

1520

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

1521

direntry->d_name);

1507

1522

}

1508

1523

}

1509

1524

close(devnull);

1596

1611

.group = 2 },

1597

1612

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

1598

1613

.arg = "SECONDS",

1599

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

1614

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

1600

1615

.group = 2 },

1601

1616

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

1602

1617

.arg = "DIR",

1674

1689

argp_state_help(state, state->out_stream,

1675

1690

ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);

1676

1691

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

1677

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

1678

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

1692

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

1679

1693

exit(argp_err_exit_status);

1680

1694

break;

1681

1695

default:

1708

1722

{

1709

1723

/* Work around Debian bug #633582:

1710

1724

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

1711

struct stat st;

1712

1725

1713

1726

/* Re-raise priviliges */

1714

1727

errno = 0;

1715

1728

ret = seteuid(0);

1716

1729

if(ret == -1){

1717

1730

perror_plus("seteuid");

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");

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

}

1765

1782

}

1766

1783

}

1767

1784

1768

1785

/* Run network hooks */

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

}

1786

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

1787

goto end;

1785

1788

}

1786

1789

1787

1790

if(not debug){

1803

1806

/* Pick the first interface returned */

1804

1807

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

1805

1808

if(debug){

1806

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

1807

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

1809

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

1808

1810

}

1809

1811

if(interface == NULL){

1810

1812

perror_plus("malloc");

1815

1817

free(direntries);

1816

1818

} else {

1817

1819

free(direntries);

1818

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

1819

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

1820

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

1820

1821

exitcode = EXIT_FAILURE;

1821

1822

goto end;

1822

1823

}

1828

1829

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

1829

1830

mc.simple_poll = avahi_simple_poll_new();

1830

1831

if(mc.simple_poll == NULL){

1831

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

1832

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

1832

fprintf_plus(stderr,

1833

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

1833

1834

exitcode = EX_UNAVAILABLE;

1834

1835

goto end;

1835

1836

}

1901

1902

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

1902

1903

if_index = (AvahiIfIndex) if_nametoindex(interface);

1903

1904

if(if_index == 0){

1904

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

1905

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

1905

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

2045

"init_gnutls_global failed\n");

2044

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

2046

2045

exitcode = EX_UNAVAILABLE;

2047

2046

goto end;

2048

2047

} else {

2064

2063

}

2065

2064

2066

2065

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

2067

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

2068

"init_gpgme failed\n");

2066

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

2069

2067

exitcode = EX_UNAVAILABLE;

2070

2068

goto end;

2071

2069

} else {

2081

2079

/* (Mainly meant for debugging) */

2082

2080

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

2083

2081

if(address == NULL){

2084

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

2085

"No colon in address\n");

2082

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

2086

2083

exitcode = EX_USAGE;

2087

2084

goto end;

2088

2085

}

2096

2093

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

2097

2094

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

2098

2095

or tmpmax != (uint16_t)tmpmax){

2099

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

2100

"Bad port number\n");

2096

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

2101

2097

exitcode = EX_USAGE;

2102

2098

goto end;

2103

2099

}

2133

2129

break;

2134

2130

}

2135

2131

if(debug){

2136

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

2137

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

2132

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

2133

(int)retry_interval);

2138

2134

}

2139

2135

sleep((int)retry_interval);

2140

2136

}

2170

2166

2171

2167

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

2172

2168

if(mc.server == NULL){

2173

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

2174

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

2175

avahi_strerror(error));

2169

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

2170

avahi_strerror(error));

2176

2171

exitcode = EX_UNAVAILABLE;

2177

2172

goto end;

2178

2173

}

2186

2181

AVAHI_PROTO_UNSPEC, "_mandos._tcp",

2187

2182

NULL, 0, browse_callback, NULL);

2188

2183

if(sb == NULL){

2189

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

2190

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

2191

avahi_strerror(avahi_server_errno(mc.server)));

2184

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

2185

avahi_strerror(avahi_server_errno(mc.server)));

2192

2186

exitcode = EX_UNAVAILABLE;

2193

2187

goto end;

2194

2188

}

2200

2194

/* Run the main loop */

2201

2195

2202

2196

if(debug){

2203

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

2204

"Starting Avahi loop search\n");

2197

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

2205

2198

}

2206

2199

2207

2200

ret = avahi_loop_with_timeout(mc.simple_poll,

2208

2201

(int)(retry_interval * 1000));

2209

2202

if(debug){

2210

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

2211

"avahi_loop_with_timeout exited %s\n",

2212

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

2203

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

2204

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

2213

2205

}

2214

2206

2215

2207

end:

2216

2208

2217

2209

if(debug){

2218

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

2219

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

2210

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

2220

2211

}

2221

2212

2222

2213

/* Cleanup things */

2238

2229

if(gpgme_initialized){

2239

2230

gpgme_release(mc.ctx);

2240

2231

}

2241

2232

2242

2233

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

2243

2234

has seen */

2244

2235

if(mc.current_server != NULL){

2250

2241

}

2251

2242

}

2252

2243

2244

/* Run network hooks */

2245

run_network_hooks("stop", interface, delay);

2246

2253

2247

/* Re-raise priviliges */

2254

2248

{

2255

2249

errno = 0;

2257

2251

if(ret == -1){

2258

2252

perror_plus("seteuid");

2259

2253

}

2260

/* Run network hooks */

2261

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

2262

goto end;

2263

}

2264

2254

2265

2255

/* Take down the network interface */

2266

2256

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

2305

2295

}

2306

2296

ret = remove(fullname);

2307

2297

if(ret == -1){

2308

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

2309

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

2298

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

2299

strerror(errno));

2310

2300

}

2311

2301

free(fullname);

2312

2302

}