/mandos/release : revision 237.15.6

26

* along with this program. If not, see

27

* <http://www.gnu.org/licenses/>.

28

*

29

* Contact the authors at <mandos@fukt.bsnet.se>.

29

* Contact the authors at <mandos@recompile.se>.

30

*/

31

32

/* Needed by GPGME, specifically gpgme_data_seek() */

53

sockaddr_in6, PF_INET6,

54

SOCK_STREAM, uid_t, gid_t, open(),

55

opendir(), DIR */

56

#include <sys/stat.h> /* open() */

56

#include <sys/stat.h> /* open(), S_ISREG */

57

#include <sys/socket.h> /* socket(), struct sockaddr_in6,

58

inet_pton(), connect() */

59

#include <fcntl.h> /* open() */

85

raise() */

86

#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,

87

EX_NOHOST, EX_IOERR, EX_PROTOCOL */

88

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

89

WEXITSTATUS(), WTERMSIG() */

88

90

89

91

#ifdef __linux__

90

92

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

108

110

init_gnutls_session(),

109

111

GNUTLS_* */

110

112

#include <gnutls/openpgp.h>

111

/* gnutls_certificate_set_openpgp_key_file(),

112

GNUTLS_OPENPGP_FMT_BASE64 */

113

/* gnutls_certificate_set_openpgp_key_file(),

114

GNUTLS_OPENPGP_FMT_BASE64 */

113

115

114

116

/* GPGME */

115

117

#include <gpgme.h> /* All GPGME types, constants and

123

125

#define PATHDIR "/conf/conf.d/mandos"

124

126

#define SECKEY "seckey.txt"

125

127

#define PUBKEY "pubkey.txt"

128

#define HOOKDIR "/lib/mandos/network-hooks.d"

126

129

127

130

bool debug = false;

128

131

static const char mandos_protocol_version[] = "1";

129

132

const char *argp_program_version = "mandos-client " VERSION;

130

const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";

133

const char *argp_program_bug_address = "<mandos@recompile.se>";

131

134

static const char sys_class_net[] = "/sys/class/net";

132

135

char *connect_to = NULL;

136

const char *hookdir = HOOKDIR;

133

137

134

138

/* Doubly linked list that need to be circularly linked when used */

135

139

typedef struct server{

170

174

perror(print_text);

171

175

}

172

176

177

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

178

va_list ap;

179

va_start (ap, format);

180

181

TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ", program_invocation_short_name));

182

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

183

}

184

173

185

/*

174

186

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

175

187

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

176

188

* "buffer_length" is how much is already used.

177

189

*/

178

190

size_t incbuffer(char **buffer, size_t buffer_length,

179

size_t buffer_capacity){

191

size_t buffer_capacity){

180

192

if(buffer_length + BUFFER_SIZE > buffer_capacity){

181

193

*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);

182

194

if(buffer == NULL){

187

199

return buffer_capacity;

188

200

}

189

201

190

int add_server(const char *ip, uint16_t port,

191

AvahiIfIndex if_index,

192

int af){

202

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

203

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

204

int af){

193

205

int ret;

194

206

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

195

207

if(new_server == NULL){

197

209

return -1;

198

210

}

199

211

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

200

.port = port,

201

.if_index = if_index,

202

.af = af };

212

.port = port,

213

.if_index = if_index,

214

.af = af };

203

215

if(new_server->ip == NULL){

204

216

perror_plus("strdup");

205

217

return -1;

206

218

}

207

/* unique case of first server */

219

/* Special case of first server */

208

220

if (mc.current_server == NULL){

209

221

new_server->next = new_server;

210

222

new_server->prev = new_server;

211

223

mc.current_server = new_server;

212

/* Placing the new server last in the list */

224

/* Place the new server last in the list */

213

225

} else {

214

226

new_server->next = mc.current_server;

215

227

new_server->prev = mc.current_server->prev;

227

239

/*

228

240

* Initialize GPGME.

229

241

*/

230

static bool init_gpgme(const char *seckey,

231

const char *pubkey, const char *tempdir){

242

static bool init_gpgme(const char *seckey, const char *pubkey,

243

const char *tempdir){

232

244

gpgme_error_t rc;

233

245

gpgme_engine_info_t engine_info;

234

246

249

261

250

262

rc = gpgme_data_new_from_fd(&pgp_data, fd);

251

263

if(rc != GPG_ERR_NO_ERROR){

252

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

264

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

253

265

gpgme_strsource(rc), gpgme_strerror(rc));

254

266

return false;

255

267

}

256

268

257

269

rc = gpgme_op_import(mc.ctx, pgp_data);

258

270

if(rc != GPG_ERR_NO_ERROR){

259

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

271

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

260

272

gpgme_strsource(rc), gpgme_strerror(rc));

261

273

return false;

262

274

}

270

282

}

271

283

272

284

if(debug){

273

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

285

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

274

286

}

275

287

276

288

/* Init GPGME */

277

289

gpgme_check_version(NULL);

278

290

rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);

279

291

if(rc != GPG_ERR_NO_ERROR){

280

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

292

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

281

293

gpgme_strsource(rc), gpgme_strerror(rc));

282

294

return false;

283

295

}

284

296

285

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

297

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

286

298

rc = gpgme_get_engine_info(&engine_info);

287

299

if(rc != GPG_ERR_NO_ERROR){

288

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

300

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

289

301

gpgme_strsource(rc), gpgme_strerror(rc));

290

302

return false;

291

303

}

298

310

engine_info = engine_info->next;

299

311

}

300

312

if(engine_info == NULL){

301

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

313

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

302

314

return false;

303

315

}

304

316

305

317

/* Create new GPGME "context" */

306

318

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

307

319

if(rc != GPG_ERR_NO_ERROR){

308

fprintf(stderr, "bad gpgme_new: %s: %s\n",

309

gpgme_strsource(rc), gpgme_strerror(rc));

320

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

321

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

322

gpgme_strerror(rc));

310

323

return false;

311

324

}

312

325

331

344

ssize_t plaintext_length = 0;

332

345

333

346

if(debug){

334

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

347

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

335

348

}

336

349

337

350

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

338

351

rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,

339

352

0);

340

353

if(rc != GPG_ERR_NO_ERROR){

341

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

354

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

342

355

gpgme_strsource(rc), gpgme_strerror(rc));

343

356

return -1;

344

357

}

346

359

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

347

360

rc = gpgme_data_new(&dh_plain);

348

361

if(rc != GPG_ERR_NO_ERROR){

349

fprintf(stderr, "bad gpgme_data_new: %s: %s\n",

362

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

363

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

350

364

gpgme_strsource(rc), gpgme_strerror(rc));

351

365

gpgme_data_release(dh_crypto);

352

366

return -1;

356

370

data buffer */

357

371

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

358

372

if(rc != GPG_ERR_NO_ERROR){

359

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

373

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

360

374

gpgme_strsource(rc), gpgme_strerror(rc));

361

375

plaintext_length = -1;

362

376

if(debug){

363

377

gpgme_decrypt_result_t result;

364

378

result = gpgme_op_decrypt_result(mc.ctx);

365

379

if(result == NULL){

366

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

380

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

367

381

} else {

368

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

382

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

369

383

result->unsupported_algorithm);

370

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

384

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

371

385

result->wrong_key_usage);

372

386

if(result->file_name != NULL){

373

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

387

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

374

388

}

375

389

gpgme_recipient_t recipient;

376

390

recipient = result->recipients;

377

391

while(recipient != NULL){

378

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

392

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

379

393

gpgme_pubkey_algo_name(recipient->pubkey_algo));

380

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

381

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

394

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

395

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

382

396

recipient->status == GPG_ERR_NO_SECKEY

383

397

? "No" : "Yes");

384

398

recipient = recipient->next;

389

403

}

390

404

391

405

if(debug){

392

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

406

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

393

407

}

394

408

395

409

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

402

416

*plaintext = NULL;

403

417

while(true){

404

418

plaintext_capacity = incbuffer(plaintext,

405

(size_t)plaintext_length,

406

plaintext_capacity);

419

(size_t)plaintext_length,

420

plaintext_capacity);

407

421

if(plaintext_capacity == 0){

408

perror_plus("incbuffer");

409

plaintext_length = -1;

410

goto decrypt_end;

422

perror_plus("incbuffer");

423

plaintext_length = -1;

424

goto decrypt_end;

411

425

}

412

426

413

427

ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,

426

440

}

427

441

428

442

if(debug){

429

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

443

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

430

444

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

431

445

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

432

446

}

454

468

/* GnuTLS log function callback */

455

469

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

456

470

const char* string){

457

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

471

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

458

472

}

459

473

460

474

static int init_gnutls_global(const char *pubkeyfilename,

462

476

int ret;

463

477

464

478

if(debug){

465

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

479

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

466

480

}

467

481

468

482

ret = gnutls_global_init();

469

483

if(ret != GNUTLS_E_SUCCESS){

470

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

471

safer_gnutls_strerror(ret));

484

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

472

485

return -1;

473

486

}

474

487

483

496

/* OpenPGP credentials */

484

497

ret = gnutls_certificate_allocate_credentials(&mc.cred);

485

498

if(ret != GNUTLS_E_SUCCESS){

486

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

487

safer_gnutls_strerror(ret));

499

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

488

500

gnutls_global_deinit();

489

501

return -1;

490

502

}

491

503

492

504

if(debug){

493

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

505

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

494

506

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

495

507

seckeyfilename);

496

508

}

499

511

(mc.cred, pubkeyfilename, seckeyfilename,

500

512

GNUTLS_OPENPGP_FMT_BASE64);

501

513

if(ret != GNUTLS_E_SUCCESS){

502

fprintf(stderr,

503

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

504

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

505

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

506

safer_gnutls_strerror(ret));

514

fprintf_plus(stderr,

515

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

516

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

517

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

507

518

goto globalfail;

508

519

}

509

520

510

521

/* GnuTLS server initialization */

511

522

ret = gnutls_dh_params_init(&mc.dh_params);

512

523

if(ret != GNUTLS_E_SUCCESS){

513

fprintf(stderr, "Error in GnuTLS DH parameter initialization:"

524

fprintf_plus(stderr, "Error in GnuTLS DH parameter initialization:"

514

525

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

515

526

goto globalfail;

516

527

}

517

528

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

518

529

if(ret != GNUTLS_E_SUCCESS){

519

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

530

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

520

531

safer_gnutls_strerror(ret));

521

532

goto globalfail;

522

533

}

543

554

}

544

555

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

545

556

if(ret != GNUTLS_E_SUCCESS){

546

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

557

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

547

558

safer_gnutls_strerror(ret));

548

559

}

549

560

557

568

}

558

569

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

559

570

if(ret != GNUTLS_E_SUCCESS){

560

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

561

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

562

safer_gnutls_strerror(ret));

571

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

572

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

563

573

gnutls_deinit(*session);

564

574

return -1;

565

575

}

574

584

}

575

585

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

576

586

if(ret != GNUTLS_E_SUCCESS){

577

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

587

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

578

588

safer_gnutls_strerror(ret));

579

589

gnutls_deinit(*session);

580

590

return -1;

626

636

pf = PF_INET;

627

637

break;

628

638

default:

629

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

639

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

630

640

errno = EINVAL;

631

641

return -1;

632

642

}

637

647

}

638

648

639

649

if(debug){

640

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

650

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

641

651

"\n", ip, port);

642

652

}

643

653

670

680

}

671

681

if(ret == 0){

672

682

int e = errno;

673

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

683

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

674

684

errno = e;

675

685

goto mandos_end;

676

686

}

681

691

682

692

if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */

683

693

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

684

-Wunreachable-code*/

694

-Wunreachable-code*/

685

695

if(if_index == AVAHI_IF_UNSPEC){

686

fprintf(stderr, "An IPv6 link-local address is incomplete"

696

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

687

697

" without a network interface\n");

688

698

errno = EINVAL;

689

699

goto mandos_end;

708

718

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

709

719

perror_plus("if_indextoname");

710

720

} else {

711

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

721

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

712

722

ip, interface, port);

713

723

}

714

724

} else {

715

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

716

port);

725

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

717

726

}

718

727

char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?

719

728

INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";

729

738

perror_plus("inet_ntop");

730

739

} else {

731

740

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

732

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

741

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

733

742

}

734

743

}

735

744

}

763

772

while(true){

764

773

size_t out_size = strlen(out);

765

774

ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,

766

out_size - written));

775

out_size - written));

767

776

if(ret == -1){

768

777

int e = errno;

769

778

perror_plus("write");

789

798

}

790

799

791

800

if(debug){

792

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

801

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

793

802

}

794

803

795

804

if(quit_now){

815

824

816

825

if(ret != GNUTLS_E_SUCCESS){

817

826

if(debug){

818

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

827

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

819

828

gnutls_perror(ret);

820

829

}

821

830

errno = EPROTO;

825

834

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

826

835

827

836

if(debug){

828

fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",

829

ip);

837

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

830

838

}

831

839

832

840

while(true){

837

845

}

838

846

839

847

buffer_capacity = incbuffer(&buffer, buffer_length,

840

buffer_capacity);

848

buffer_capacity);

841

849

if(buffer_capacity == 0){

842

850

int e = errno;

843

851

perror_plus("incbuffer");

870

878

}

871

879

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

872

880

if(ret < 0){

873

fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");

881

fprintf_plus(stderr, "*** GnuTLS Re-handshake failed ***\n");

874

882

gnutls_perror(ret);

875

883

errno = EPROTO;

876

884

goto mandos_end;

877

885

}

878

886

break;

879

887

default:

880

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

888

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

881

889

" encrypted session with Mandos server\n");

882

890

gnutls_bye(session, GNUTLS_SHUT_RDWR);

883

891

errno = EIO;

889

897

}

890

898

891

899

if(debug){

892

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

900

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

893

901

}

894

902

895

903

if(quit_now){

907

915

908

916

if(buffer_length > 0){

909

917

ssize_t decrypted_buffer_size;

910

decrypted_buffer_size = pgp_packet_decrypt(buffer,

911

buffer_length,

918

decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,

912

919

&decrypted_buffer);

913

920

if(decrypted_buffer_size >= 0){

914

921

925

932

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

926

933

int e = errno;

927

934

if(debug){

928

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

935

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

929

936

strerror(errno));

930

937

}

931

938

errno = e;

989

996

switch(event){

990

997

default:

991

998

case AVAHI_RESOLVER_FAILURE:

992

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

999

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

993

1000

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

994

1001

avahi_strerror(avahi_server_errno(mc.server)));

995

1002

break;

999

1006

char ip[AVAHI_ADDRESS_STR_MAX];

1000

1007

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

1001

1008

if(debug){

1002

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

1009

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

1003

1010

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

1004

1011

ip, (intmax_t)interface, port);

1005

1012

}

1039

1046

default:

1040

1047

case AVAHI_BROWSER_FAILURE:

1041

1048

1042

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

1049

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

1043

1050

avahi_strerror(avahi_server_errno(mc.server)));

1044

1051

avahi_simple_poll_quit(mc.simple_poll);

1045

1052

return;

1053

1060

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

1054

1061

name, type, domain, protocol, 0,

1055

1062

resolve_callback, NULL) == NULL)

1056

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

1063

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

1057

1064

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

1058

1065

break;

1059

1066

1063

1070

case AVAHI_BROWSER_ALL_FOR_NOW:

1064

1071

case AVAHI_BROWSER_CACHE_EXHAUSTED:

1065

1072

if(debug){

1066

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

1073

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

1067

1074

}

1068

1075

break;

1069

1076

}

1084

1091

errno = old_errno;

1085

1092

}

1086

1093

1087

/*

1088

* This function determines if a directory entry in /sys/class/net

1089

* corresponds to an acceptable network device.

1090

* (This function is passed to scandir(3) as a filter function.)

1091

*/

1092

int good_interface(const struct dirent *if_entry){

1093

ssize_t ssret;

1094

char *flagname = NULL;

1095

if(if_entry->d_name[0] == '.'){

1096

return 0;

1097

}

1098

int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,

1099

if_entry->d_name);

1100

if(ret < 0){

1101

perror_plus("asprintf");

1102

return 0;

1103

}

1104

int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));

1105

if(flags_fd == -1){

1106

perror_plus("open");

1107

free(flagname);

1108

return 0;

1109

}

1110

free(flagname);

1111

typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */

1112

/* read line from flags_fd */

1113

ssize_t to_read = 2+(sizeof(ifreq_flags)*2)+1; /* "0x1003\n" */

1114

char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */

1115

flagstring[(size_t)to_read] = '\0';

1116

if(flagstring == NULL){

1117

perror_plus("malloc");

1118

close(flags_fd);

1119

return 0;

1120

}

1121

while(to_read > 0){

1122

ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,

1123

(size_t)to_read));

1124

if(ssret == -1){

1125

perror_plus("read");

1126

free(flagstring);

1127

close(flags_fd);

1128

return 0;

1129

}

1130

to_read -= ssret;

1131

if(ssret == 0){

1132

break;

1133

}

1134

}

1135

close(flags_fd);

1136

intmax_t tmpmax;

1137

char *tmp;

1138

errno = 0;

1139

tmpmax = strtoimax(flagstring, &tmp, 0);

1140

if(errno != 0 or tmp == flagstring or (*tmp != '\0'

1141

and not (isspace(*tmp)))

1142

or tmpmax != (ifreq_flags)tmpmax){

1094

bool get_flags(const char *ifname, struct ifreq *ifr){

1095

int ret;

1096

1097

int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);

1098

if(s < 0){

1099

perror_plus("socket");

1100

return false;

1101

}

1102

strcpy(ifr->ifr_name, ifname);

1103

ret = ioctl(s, SIOCGIFFLAGS, ifr);

1104

if(ret == -1){

1143

1105

if(debug){

1144

fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",

1145

flagstring, if_entry->d_name);

1106

perror_plus("ioctl SIOCGIFFLAGS");

1146

1107

}

1147

free(flagstring);

1148

return 0;

1108

return false;

1149

1109

}

1150

free(flagstring);

1151

ifreq_flags flags = (ifreq_flags)tmpmax;

1110

return true;

1111

}

1112

1113

bool good_flags(const char *ifname, const struct ifreq *ifr){

1114

1152

1115

/* Reject the loopback device */

1153

if(flags & IFF_LOOPBACK){

1116

if(ifr->ifr_flags & IFF_LOOPBACK){

1154

1117

if(debug){

1155

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

1156

if_entry->d_name);

1118

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

1157

1119

}

1158

return 0;

1120

return false;

1159

1121

}

1160

1122

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

1161

if(connect_to != NULL and (flags & IFF_POINTOPOINT)){

1123

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

1162

1124

if(debug){

1163

fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",

1164

if_entry->d_name);

1125

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

1165

1126

}

1166

return 1;

1127

return true;

1167

1128

}

1168

1129

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

1169

if(not (flags & IFF_BROADCAST)){

1130

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

1170

1131

if(debug){

1171

fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",

1172

if_entry->d_name);

1132

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

1173

1133

}

1174

return 0;

1134

return false;

1175

1135

}

1176

1136

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

1177

if(flags & IFF_NOARP){

1137

if(ifr->ifr_flags & IFF_NOARP){

1178

1138

if(debug){

1179

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

1180

if_entry->d_name);

1139

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

1181

1140

}

1182

return 0;

1141

return false;

1183

1142

}

1143

1184

1144

/* Accept this device */

1185

1145

if(debug){

1186

fprintf(stderr, "Interface \"%s\" is acceptable\n",

1187

if_entry->d_name);

1146

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

1147

}

1148

return true;

1149

}

1150

1151

/*

1152

* This function determines if a directory entry in /sys/class/net

1153

* corresponds to an acceptable network device.

1154

* (This function is passed to scandir(3) as a filter function.)

1155

*/

1156

int good_interface(const struct dirent *if_entry){

1157

if(if_entry->d_name[0] == '.'){

1158

return 0;

1159

}

1160

1161

struct ifreq ifr;

1162

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

1163

if(debug){

1164

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

1165

if_entry->d_name);

1166

}

1167

return 0;

1168

}

1169

1170

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

1171

return 0;

1172

}

1173

return 1;

1174

}

1175

1176

/*

1177

* This function determines if a directory entry in /sys/class/net

1178

* corresponds to an acceptable network device which is up.

1179

* (This function is passed to scandir(3) as a filter function.)

1180

*/

1181

int up_interface(const struct dirent *if_entry){

1182

if(if_entry->d_name[0] == '.'){

1183

return 0;

1184

}

1185

1186

struct ifreq ifr;

1187

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

1188

if(debug){

1189

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

1190

if_entry->d_name);

1191

}

1192

return 0;

1193

}

1194

1195

/* Reject down interfaces */

1196

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

1197

if(debug){

1198

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

1199

if_entry->d_name);

1200

}

1201

return 0;

1202

}

1203

1204

/* Reject non-running interfaces */

1205

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

1206

if(debug){

1207

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

1208

if_entry->d_name);

1209

}

1210

return 0;

1211

}

1212

1213

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

1214

return 0;

1188

1215

}

1189

1216

return 1;

1190

1217

}

1200

1227

return 1;

1201

1228

}

1202

1229

1230

/* Is this directory entry a runnable program? */

1231

int runnable_hook(const struct dirent *direntry){

1232

int ret;

1233

size_t sret;

1234

struct stat st;

1235

1236

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

1237

/* Empty name? */

1238

return 0;

1239

}

1240

1241

sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"

1242

"abcdefghijklmnopqrstuvwxyz"

1243

"0123456789"

1244

"_-");

1245

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

1246

/* Contains non-allowed characters */

1247

if(debug){

1248

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

1249

direntry->d_name);

1250

}

1251

return 0;

1252

}

1253

1254

char *fullname = NULL;

1255

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

1256

if(ret < 0){

1257

perror_plus("asprintf");

1258

return 0;

1259

}

1260

1261

ret = stat(fullname, &st);

1262

if(ret == -1){

1263

if(debug){

1264

perror_plus("Could not stat hook");

1265

}

1266

return 0;

1267

}

1268

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

1269

/* Not a regular file */

1270

if(debug){

1271

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

1272

direntry->d_name);

1273

}

1274

return 0;

1275

}

1276

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

1277

/* Not executable */

1278

if(debug){

1279

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

1280

direntry->d_name);

1281

}

1282

return 0;

1283

}

1284

return 1;

1285

}

1286

1203

1287

int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){

1204

1288

int ret;

1205

1289

struct timespec now;

1206

1290

struct timespec waited_time;

1207

1291

intmax_t block_time;

1208

1292

1209

1293

while(true){

1210

1294

if(mc.current_server == NULL){

1211

1295

if (debug){

1212

fprintf(stderr,

1213

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

1296

fprintf_plus(stderr, "Wait until first server is found. No timeout!\n");

1214

1297

}

1215

1298

ret = avahi_simple_poll_iterate(s, -1);

1216

1299

} else {

1217

1300

if (debug){

1218

fprintf(stderr, "Check current_server if we should run it,"

1301

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

1219

1302

" or wait\n");

1220

1303

}

1221

1304

/* the current time */

1236

1319

block_time = ((retry_interval

1237

1320

- ((intmax_t)waited_time.tv_sec * 1000))

1238

1321

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

1239

1322

1240

1323

if (debug){

1241

fprintf(stderr, "Blocking for %ld ms\n", block_time);

1324

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

1242

1325

}

1243

1326

1244

1327

if(block_time <= 0){

1245

1328

ret = start_mandos_communication(mc.current_server->ip,

1246

1329

mc.current_server->port,

1264

1347

ret = avahi_simple_poll_iterate(s, (int)block_time);

1265

1348

}

1266

1349

if(ret != 0){

1267

if (ret > 0 or errno != EINTR) {

1350

if (ret > 0 or errno != EINTR){

1268

1351

return (ret != 1) ? ret : 0;

1269

1352

}

1270

1353

}

1358

1441

.arg = "SECONDS",

1359

1442

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

1360

1443

.group = 2 },

1444

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

1445

.arg = "DIR",

1446

.doc = "Directory where network hooks are located",

1447

.group = 2 },

1361

1448

/*

1362

1449

* These reproduce what we would get without ARGP_NO_HELP

1363

1450

*/

1411

1498

errno = 0;

1412

1499

retry_interval = strtod(arg, &tmp);

1413

1500

if(errno != 0 or tmp == arg or *tmp != '\0'

1414

or (retry_interval * 1000) > INT_MAX){

1501

or (retry_interval * 1000) > INT_MAX

1502

or retry_interval < 0){

1415

1503

argp_error(state, "Bad retry interval");

1416

1504

}

1417

1505

break;

1506

case 133: /* --network-hook-dir */

1507

hookdir = arg;

1508

break;

1418

1509

/*

1419

1510

* These reproduce what we would get without ARGP_NO_HELP

1420

1511

*/

1426

1517

argp_state_help(state, state->out_stream,

1427

1518

ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);

1428

1519

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

1429

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

1520

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

1521

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

1430

1522

exit(argp_err_exit_status);

1431

1523

break;

1432

1524

default:

1468

1560

perror_plus("seteuid");

1469

1561

}

1470

1562

1471

int seckey_fd = open(PATHDIR "/" SECKEY, O_RDONLY);

1472

if(seckey_fd == -1){

1473

perror_plus("open");

1474

} else {

1475

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

1476

if(ret == -1){

1477

perror_plus("fstat");

1563

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

1564

int seckey_fd = open(seckey, O_RDONLY);

1565

if(seckey_fd == -1){

1566

perror_plus("open");

1478

1567

} else {

1479

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

1480

ret = fchown(seckey_fd, uid, gid);

1481

if(ret == -1){

1482

perror_plus("fchown");

1568

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

1569

if(ret == -1){

1570

perror_plus("fstat");

1571

} else {

1572

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

1573

ret = fchown(seckey_fd, uid, gid);

1574

if(ret == -1){

1575

perror_plus("fchown");

1576

}

1483

1577

}

1484

1578

}

1579

TEMP_FAILURE_RETRY(close(seckey_fd));

1485

1580

}

1486

TEMP_FAILURE_RETRY(close(seckey_fd));

1487

1581

}

1488

1582

1489

int pubkey_fd = open(PATHDIR "/" PUBKEY, O_RDONLY);

1490

if(pubkey_fd == -1){

1491

perror_plus("open");

1492

} else {

1493

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

1494

if(ret == -1){

1495

perror_plus("fstat");

1583

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

1584

int pubkey_fd = open(pubkey, O_RDONLY);

1585

if(pubkey_fd == -1){

1586

perror_plus("open");

1496

1587

} else {

1497

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

1498

ret = fchown(pubkey_fd, uid, gid);

1499

if(ret == -1){

1500

perror_plus("fchown");

1588

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

1589

if(ret == -1){

1590

perror_plus("fstat");

1591

} else {

1592

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

1593

ret = fchown(pubkey_fd, uid, gid);

1594

if(ret == -1){

1595

perror_plus("fchown");

1596

}

1501

1597

}

1502

1598

}

1599

TEMP_FAILURE_RETRY(close(pubkey_fd));

1503

1600

}

1504

TEMP_FAILURE_RETRY(close(pubkey_fd));

1505

1601

}

1506

1602

1507

1603

/* Lower privileges */

1512

1608

}

1513

1609

}

1514

1610

1611

/* Find network hooks and run them */

1612

{

1613

struct dirent **direntries;

1614

struct dirent *direntry;

1615

int numhooks = scandir(hookdir, &direntries, runnable_hook,

1616

alphasort);

1617

if(numhooks == -1){

1618

perror_plus("scandir");

1619

} else {

1620

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

1621

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

1622

direntry = direntries[0];

1623

char *fullname = NULL;

1624

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

1625

if(ret < 0){

1626

perror_plus("asprintf");

1627

continue;

1628

}

1629

pid_t hook_pid = fork();

1630

if(hook_pid == 0){

1631

/* Child */

1632

dup2(devnull, STDIN_FILENO);

1633

close(devnull);

1634

dup2(STDERR_FILENO, STDOUT_FILENO);

1635

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

1636

if(ret == -1){

1637

perror_plus("setenv");

1638

exit(1);

1639

}

1640

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

1641

if(ret == -1){

1642

perror_plus("setenv");

1643

exit(1);

1644

}

1645

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

1646

if(ret == -1){

1647

perror_plus("setenv");

1648

exit(1);

1649

}

1650

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

1651

if(ret == -1){

1652

perror_plus("setenv");

1653

exit(1);

1654

}

1655

char *delaystring;

1656

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

1657

if(ret == -1){

1658

perror_plus("asprintf");

1659

exit(1);

1660

}

1661

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

1662

if(ret == -1){

1663

free(delaystring);

1664

perror_plus("setenv");

1665

exit(1);

1666

}

1667

free(delaystring);

1668

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

1669

perror_plus("execl");

1670

} else {

1671

int status;

1672

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

1673

perror_plus("waitpid");

1674

free(fullname);

1675

continue;

1676

}

1677

if(WIFEXITED(status)){

1678

if(WEXITSTATUS(status) != 0){

1679

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

1680

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

1681

WEXITSTATUS(status));

1682

free(fullname);

1683

continue;

1684

}

1685

} else if(WIFSIGNALED(status)){

1686

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

1687

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

1688

WTERMSIG(status));

1689

free(fullname);

1690

continue;

1691

} else {

1692

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

1693

direntry->d_name);

1694

free(fullname);

1695

continue;

1696

}

1697

}

1698

free(fullname);

1699

if(quit_now){

1700

goto end;

1701

}

1702

}

1703

close(devnull);

1704

}

1705

}

1706

1515

1707

if(not debug){

1516

1708

avahi_set_log_function(empty_log);

1517

1709

}

1518

1710

1519

1711

if(interface[0] == '\0'){

1520

1712

struct dirent **direntries;

1521

ret = scandir(sys_class_net, &direntries, good_interface,

1713

/* First look for interfaces that are up */

1714

ret = scandir(sys_class_net, &direntries, up_interface,

1522

1715

alphasort);

1716

if(ret == 0){

1717

/* No up interfaces, look for any good interfaces */

1718

free(direntries);

1719

ret = scandir(sys_class_net, &direntries, good_interface,

1720

alphasort);

1721

}

1523

1722

if(ret >= 1){

1524

/* Pick the first good interface */

1723

/* Pick the first interface returned */

1525

1724

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

1526

1725

if(debug){

1527

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

1726

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

1528

1727

}

1529

1728

if(interface == NULL){

1530

1729

perror_plus("malloc");

1535

1734

free(direntries);

1536

1735

} else {

1537

1736

free(direntries);

1538

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

1737

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

1539

1738

exitcode = EXIT_FAILURE;

1540

1739

goto end;

1541

1740

}

1547

1746

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

1548

1747

mc.simple_poll = avahi_simple_poll_new();

1549

1748

if(mc.simple_poll == NULL){

1550

fprintf(stderr, "Avahi: Failed to create simple poll object.\n");

1749

fprintf_plus(stderr, "Avahi: Failed to create simple poll object.\n");

1551

1750

exitcode = EX_UNAVAILABLE;

1552

1751

goto end;

1553

1752

}

1619

1818

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

1620

1819

if_index = (AvahiIfIndex) if_nametoindex(interface);

1621

1820

if(if_index == 0){

1622

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

1821

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

1623

1822

exitcode = EX_UNAVAILABLE;

1624

1823

goto end;

1625

1824

}

1766

1965

1767

1966

ret = init_gnutls_global(pubkey, seckey);

1768

1967

if(ret == -1){

1769

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

1968

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

1770

1969

exitcode = EX_UNAVAILABLE;

1771

1970

goto end;

1772

1971

} else {

1788

1987

}

1789

1988

1790

1989

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

1791

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

1990

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

1792

1991

exitcode = EX_UNAVAILABLE;

1793

1992

goto end;

1794

1993

} else {

1804

2003

/* (Mainly meant for debugging) */

1805

2004

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

1806

2005

if(address == NULL){

1807

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

2006

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

1808

2007

exitcode = EX_USAGE;

1809

2008

goto end;

1810

2009

}

1818

2017

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

1819

2018

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

1820

2019

or tmpmax != (uint16_t)tmpmax){

1821

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

2020

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

1822

2021

exitcode = EX_USAGE;

1823

2022

goto end;

1824

2023

}

1829

2028

1830

2029

port = (uint16_t)tmpmax;

1831

2030

*address = '\0';

1832

address = connect_to;

1833

2031

/* Colon in address indicates IPv6 */

1834

2032

int af;

1835

if(strchr(address, ':') != NULL){

2033

if(strchr(connect_to, ':') != NULL){

1836

2034

af = AF_INET6;

2035

/* Accept [] around IPv6 address - see RFC 5952 */

2036

if(connect_to[0] == '[' and address[-1] == ']')

2037

{

2038

connect_to++;

2039

address[-1] = '\0';

2040

}

1837

2041

} else {

1838

2042

af = AF_INET;

1839

2043

}

2044

address = connect_to;

1840

2045

1841

2046

if(quit_now){

1842

2047

goto end;

1843

2048

}

1844

2049

1845

2050

while(not quit_now){

1846

2051

ret = start_mandos_communication(address, port, if_index, af);

1847

2052

if(quit_now or ret == 0){

1848

2053

break;

1849

2054

}

1850

sleep((int)retry_interval or 1);

1851

};

1852

2055

if(debug){

2056

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

2057

}

2058

sleep((int)retry_interval);

2059

}

2060

1853

2061

if (not quit_now){

1854

2062

exitcode = EXIT_SUCCESS;

1855

2063

}

1856

2064

1857

2065

goto end;

1858

2066

}

1859

2067

1881

2089

1882

2090

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

1883

2091

if(mc.server == NULL){

1884

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

2092

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

1885

2093

avahi_strerror(error));

1886

2094

exitcode = EX_UNAVAILABLE;

1887

2095

goto end;

1896

2104

AVAHI_PROTO_UNSPEC, "_mandos._tcp",

1897

2105

NULL, 0, browse_callback, NULL);

1898

2106

if(sb == NULL){

1899

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

2107

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

1900

2108

avahi_strerror(avahi_server_errno(mc.server)));

1901

2109

exitcode = EX_UNAVAILABLE;

1902

2110

goto end;

1909

2117

/* Run the main loop */

1910

2118

1911

2119

if(debug){

1912

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

2120

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

1913

2121

}

1914

2122

1915

2123

ret = avahi_loop_with_timeout(mc.simple_poll,

1916

2124

(int)(retry_interval * 1000));

1917

2125

if(debug){

1918

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

2126

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

1919

2127

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

1920

2128

}

1921

2129

1922

2130

end:

1923

2131

1924

2132

if(debug){

1925

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

2133

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

1926

2134

}

1927

2135

1928

2136

/* Cleanup things */

1956

2164

}

1957

2165

}

1958

2166

2167

/* XXX run network hooks "stop" here */

2168

1959

2169

/* Take down the network interface */

1960

2170

if(take_down_interface){

1961

2171

/* Re-raise priviliges */

1968

2178

ret = ioctl(sd, SIOCGIFFLAGS, &network);

1969

2179

if(ret == -1){

1970

2180

perror_plus("ioctl SIOCGIFFLAGS");

1971

} else if(network.ifr_flags & IFF_UP) {

2181

} else if(network.ifr_flags & IFF_UP){

1972

2182

network.ifr_flags &= ~(short)IFF_UP; /* clear flag */

1973

2183

ret = ioctl(sd, SIOCSIFFLAGS, &network);

1974

2184

if(ret == -1){

1992

2202

if(tempdir_created){

1993

2203

struct dirent **direntries = NULL;

1994

2204

struct dirent *direntry = NULL;

1995

ret = scandir(tempdir, &direntries, notdotentries, alphasort);

1996

if (ret > 0){

1997

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

2205

int numentries = scandir(tempdir, &direntries, notdotentries,

2206

alphasort);

2207

if (numentries > 0){

2208

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

1998

2209

direntry = direntries[i];

1999

2210

char *fullname = NULL;

2000

2211

ret = asprintf(&fullname, "%s/%s", tempdir,

2005

2216

}

2006

2217

ret = remove(fullname);

2007

2218

if(ret == -1){

2008

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

2009

strerror(errno));

2219

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

2010

2220

}

2011

2221

free(fullname);

2012

2222

}

2013

2223

}

2014

2224

2015

/* need to be cleaned even if ret == 0 because man page doesn't

2016

specify */

2225

/* need to clean even if 0 because man page doesn't specify */

2017

2226

free(direntries);

2018

if (ret == -1){

2227

if (numentries == -1){

2019

2228

perror_plus("scandir");

2020

2229

}

2021

2230

ret = rmdir(tempdir);