/mandos/release : revision 237.16.3

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() */

62

#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,

63

strtoimax() */

64

#include <assert.h> /* assert() */

65

#include <errno.h> /* perror(), errno, program_invocation_short_name */

65

#include <errno.h> /* perror(), errno,

66

program_invocation_short_name */

66

67

#include <time.h> /* nanosleep(), time(), sleep() */

67

68

#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,

68

69

SIOCSIFFLAGS, if_indextoname(),

73

74

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

74

75

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

75

76

setgid(), pause() */

76

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

77

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

77

78

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

78

79

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

79

80

argp_state, struct argp,

84

85

raise() */

85

86

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

86

87

EX_NOHOST, EX_IOERR, EX_PROTOCOL */

88

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

89

WEXITSTATUS(), WTERMSIG() */

87

90

88

91

#ifdef __linux__

89

92

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

122

125

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

123

126

#define SECKEY "seckey.txt"

124

127

#define PUBKEY "pubkey.txt"

128

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

125

129

126

130

bool debug = false;

127

131

static const char mandos_protocol_version[] = "1";

128

132

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

129

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

133

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

130

134

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

131

135

char *connect_to = NULL;

132

136

133

/* Doubly linked list that need to be circular linked when ever used */

137

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

134

138

typedef struct server{

135

139

const char *ip;

136

140

uint16_t port;

156

160

/* global context so signal handler can reach it*/

157

161

mandos_context mc = { .simple_poll = NULL, .server = NULL,

158

162

.dh_bits = 1024, .priority = "SECURE256"

159

":!CTYPE-X.509:+CTYPE-OPENPGP", .current_server = NULL };

163

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

164

.current_server = NULL };

160

165

161

166

sig_atomic_t quit_now = 0;

162

167

int signal_received = 0;

163

168

164

169

/* Function to use when printing errors */

165

170

void perror_plus(const char *print_text){

166

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

171

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

172

program_invocation_short_name);

167

173

perror(print_text);

168

174

}

169

175

184

190

return buffer_capacity;

185

191

}

186

192

193

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

187

194

int add_server(const char *ip, uint16_t port,

188

195

AvahiIfIndex if_index,

189

196

int af){

199

206

.af = af };

200

207

if(new_server->ip == NULL){

201

208

perror_plus("strdup");

202

return -1;

209

return -1;

203

210

}

204

/* uniqe case of first server */

211

/* Special case of first server */

205

212

if (mc.current_server == NULL){

206

213

new_server->next = new_server;

207

214

new_server->prev = new_server;

208

215

mc.current_server = new_server;

209

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

216

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

210

217

} else {

211

218

new_server->next = mc.current_server;

212

219

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

246

253

247

254

rc = gpgme_data_new_from_fd(&pgp_data, fd);

248

255

if(rc != GPG_ERR_NO_ERROR){

249

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

256

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

257

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

250

258

gpgme_strsource(rc), gpgme_strerror(rc));

251

259

return false;

252

260

}

253

261

254

262

rc = gpgme_op_import(mc.ctx, pgp_data);

255

263

if(rc != GPG_ERR_NO_ERROR){

256

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

264

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

265

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

257

266

gpgme_strsource(rc), gpgme_strerror(rc));

258

267

return false;

259

268

}

267

276

}

268

277

269

278

if(debug){

270

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

279

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

280

"Initializing GPGME\n");

271

281

}

272

282

273

283

/* Init GPGME */

274

284

gpgme_check_version(NULL);

275

285

rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);

276

286

if(rc != GPG_ERR_NO_ERROR){

277

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

287

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

288

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

278

289

gpgme_strsource(rc), gpgme_strerror(rc));

279

290

return false;

280

291

}

281

292

282

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

293

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

283

294

rc = gpgme_get_engine_info(&engine_info);

284

295

if(rc != GPG_ERR_NO_ERROR){

285

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

296

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

297

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

286

298

gpgme_strsource(rc), gpgme_strerror(rc));

287

299

return false;

288

300

}

295

307

engine_info = engine_info->next;

296

308

}

297

309

if(engine_info == NULL){

298

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

310

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

311

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

299

312

return false;

300

313

}

301

314

302

315

/* Create new GPGME "context" */

303

316

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

304

317

if(rc != GPG_ERR_NO_ERROR){

305

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

306

gpgme_strsource(rc), gpgme_strerror(rc));

318

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

319

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

320

gpgme_strerror(rc));

307

321

return false;

308

322

}

309

323

328

342

ssize_t plaintext_length = 0;

329

343

330

344

if(debug){

331

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

345

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

346

"Trying to decrypt OpenPGP data\n");

332

347

}

333

348

334

349

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

335

350

rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,

336

351

0);

337

352

if(rc != GPG_ERR_NO_ERROR){

338

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

353

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

354

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

339

355

gpgme_strsource(rc), gpgme_strerror(rc));

340

356

return -1;

341

357

}

343

359

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

344

360

rc = gpgme_data_new(&dh_plain);

345

361

if(rc != GPG_ERR_NO_ERROR){

346

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

362

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

363

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

347

364

gpgme_strsource(rc), gpgme_strerror(rc));

348

365

gpgme_data_release(dh_crypto);

349

366

return -1;

353

370

data buffer */

354

371

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

355

372

if(rc != GPG_ERR_NO_ERROR){

356

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

373

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

374

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

357

375

gpgme_strsource(rc), gpgme_strerror(rc));

358

376

plaintext_length = -1;

359

377

if(debug){

360

378

gpgme_decrypt_result_t result;

361

379

result = gpgme_op_decrypt_result(mc.ctx);

362

380

if(result == NULL){

363

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

381

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

382

"gpgme_op_decrypt_result failed\n");

364

383

} else {

365

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

384

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

385

"Unsupported algorithm: %s\n",

366

386

result->unsupported_algorithm);

367

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

387

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

388

"Wrong key usage: %u\n",

368

389

result->wrong_key_usage);

369

390

if(result->file_name != NULL){

370

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

391

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

392

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

371

393

}

372

394

gpgme_recipient_t recipient;

373

395

recipient = result->recipients;

374

396

while(recipient != NULL){

375

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

397

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

398

"Public key algorithm: %s\n",

376

399

gpgme_pubkey_algo_name(recipient->pubkey_algo));

377

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

378

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

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",

379

404

recipient->status == GPG_ERR_NO_SECKEY

380

405

? "No" : "Yes");

381

406

recipient = recipient->next;

386

411

}

387

412

388

413

if(debug){

389

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

414

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

415

"Decryption of OpenPGP data succeeded\n");

390

416

}

391

417

392

418

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

423

449

}

424

450

425

451

if(debug){

426

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

452

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

453

"Decrypted password is: ");

427

454

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

428

455

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

429

456

}

451

478

/* GnuTLS log function callback */

452

479

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

453

480

const char* string){

454

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

481

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

455

482

}

456

483

457

484

static int init_gnutls_global(const char *pubkeyfilename,

459

486

int ret;

460

487

461

488

if(debug){

462

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

489

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

490

"Initializing GnuTLS\n");

463

491

}

464

492

465

493

ret = gnutls_global_init();

466

494

if(ret != GNUTLS_E_SUCCESS){

467

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

468

safer_gnutls_strerror(ret));

495

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

496

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

469

497

return -1;

470

498

}

471

499

478

506

}

479

507

480

508

/* OpenPGP credentials */

481

gnutls_certificate_allocate_credentials(&mc.cred);

509

ret = gnutls_certificate_allocate_credentials(&mc.cred);

482

510

if(ret != GNUTLS_E_SUCCESS){

483

fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning

484

from

485

-Wunreachable-code

486

*/

487

safer_gnutls_strerror(ret));

511

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

512

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

488

513

gnutls_global_deinit();

489

514

return -1;

490

515

}

491

516

492

517

if(debug){

493

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

518

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

519

"Attempting to use OpenPGP public key %s and"

494

520

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

495

521

seckeyfilename);

496

522

}

500

526

GNUTLS_OPENPGP_FMT_BASE64);

501

527

if(ret != GNUTLS_E_SUCCESS){

502

528

fprintf(stderr,

529

"Mandos plugin mandos-client: "

503

530

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

504

531

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

505

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

506

safer_gnutls_strerror(ret));

532

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

533

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

507

534

goto globalfail;

508

535

}

509

536

510

537

/* GnuTLS server initialization */

511

538

ret = gnutls_dh_params_init(&mc.dh_params);

512

539

if(ret != GNUTLS_E_SUCCESS){

513

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

540

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

541

"Error in GnuTLS DH parameter initialization:"

514

542

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

515

543

goto globalfail;

516

544

}

517

545

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

518

546

if(ret != GNUTLS_E_SUCCESS){

519

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

547

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

548

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

520

549

safer_gnutls_strerror(ret));

521

550

goto globalfail;

522

551

}

543

572

}

544

573

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

545

574

if(ret != GNUTLS_E_SUCCESS){

546

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

575

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

576

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

547

577

safer_gnutls_strerror(ret));

548

578

}

549

579

557

587

}

558

588

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

559

589

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));

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));

563

594

gnutls_deinit(*session);

564

595

return -1;

565

596

}

574

605

}

575

606

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

576

607

if(ret != GNUTLS_E_SUCCESS){

577

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

608

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

609

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

578

610

safer_gnutls_strerror(ret));

579

611

gnutls_deinit(*session);

580

612

return -1;

626

658

pf = PF_INET;

627

659

break;

628

660

default:

629

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

661

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

662

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

630

663

errno = EINVAL;

631

664

return -1;

632

665

}

637

670

}

638

671

639

672

if(debug){

640

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

673

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

674

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

641

675

"\n", ip, port);

642

676

}

643

677

670

704

}

671

705

if(ret == 0){

672

706

int e = errno;

673

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

707

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

708

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

674

709

errno = e;

675

710

goto mandos_end;

676

711

}

683

718

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

684

719

-Wunreachable-code*/

685

720

if(if_index == AVAHI_IF_UNSPEC){

686

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

721

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

722

"An IPv6 link-local address is incomplete"

687

723

" without a network interface\n");

688

724

errno = EINVAL;

689

725

goto mandos_end;

708

744

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

709

745

perror_plus("if_indextoname");

710

746

} else {

711

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

747

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

748

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

712

749

ip, interface, port);

713

750

}

714

751

} else {

715

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

716

port);

752

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

753

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

717

754

}

718

755

char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?

719

756

INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";

729

766

perror_plus("inet_ntop");

730

767

} else {

731

768

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

732

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

769

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

770

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

733

771

}

734

772

}

735

773

}

789

827

}

790

828

791

829

if(debug){

792

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

830

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

831

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

793

832

}

794

833

795

834

if(quit_now){

796

835

errno = EINTR;

797

836

goto mandos_end;

798

837

}

799

800

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

838

839

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

801

840

gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);

802

841

803

842

if(quit_now){

815

854

816

855

if(ret != GNUTLS_E_SUCCESS){

817

856

if(debug){

818

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

857

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

858

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

819

859

gnutls_perror(ret);

820

860

}

821

861

errno = EPROTO;

825

865

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

826

866

827

867

if(debug){

828

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

829

ip);

868

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

869

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

830

870

}

831

871

832

872

while(true){

870

910

}

871

911

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

872

912

if(ret < 0){

873

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

913

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

914

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

874

915

gnutls_perror(ret);

875

916

errno = EPROTO;

876

917

goto mandos_end;

877

918

}

878

919

break;

879

920

default:

880

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

921

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

922

"Unknown error while reading data from"

881

923

" encrypted session with Mandos server\n");

882

924

gnutls_bye(session, GNUTLS_SHUT_RDWR);

883

925

errno = EIO;

889

931

}

890

932

891

933

if(debug){

892

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

934

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

935

"Closing TLS session\n");

893

936

}

894

937

895

938

if(quit_now){

925

968

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

926

969

int e = errno;

927

970

if(debug){

928

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

971

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

972

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

929

973

strerror(errno));

930

974

}

931

975

errno = e;

989

1033

switch(event){

990

1034

default:

991

1035

case AVAHI_RESOLVER_FAILURE:

992

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

1036

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

1037

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

993

1038

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

994

1039

avahi_strerror(avahi_server_errno(mc.server)));

995

1040

break;

999

1044

char ip[AVAHI_ADDRESS_STR_MAX];

1000

1045

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

1001

1046

if(debug){

1002

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

1047

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

1048

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

1003

1049

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

1004

1050

ip, (intmax_t)interface, port);

1005

1051

}

1039

1085

default:

1040

1086

case AVAHI_BROWSER_FAILURE:

1041

1087

1042

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

1088

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

1089

"(Avahi browser) %s\n",

1043

1090

avahi_strerror(avahi_server_errno(mc.server)));

1044

1091

avahi_simple_poll_quit(mc.simple_poll);

1045

1092

return;

1053

1100

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

1054

1101

name, type, domain, protocol, 0,

1055

1102

resolve_callback, NULL) == NULL)

1056

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

1103

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

1104

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

1057

1105

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

1058

1106

break;

1059

1107

1063

1111

case AVAHI_BROWSER_ALL_FOR_NOW:

1064

1112

case AVAHI_BROWSER_CACHE_EXHAUSTED:

1065

1113

if(debug){

1066

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

1114

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

1115

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

1067

1116

}

1068

1117

break;

1069

1118

}

1070

1119

}

1071

1120

1072

/* Signal handler that stops main loop after sigterm has been called */

1121

/* Signal handler that stops main loop after SIGTERM */

1073

1122

static void handle_sigterm(int sig){

1074

1123

if(quit_now){

1075

1124

return;

1084

1133

errno = old_errno;

1085

1134

}

1086

1135

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 = (sizeof(ifreq_flags)*2)+3; /* "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){

1136

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

1137

int ret;

1138

1139

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

1140

if(s < 0){

1141

perror_plus("socket");

1142

return false;

1143

}

1144

strcpy(ifr->ifr_name, ifname);

1145

ret = ioctl(s, SIOCGIFFLAGS, ifr);

1146

if(ret == -1){

1143

1147

if(debug){

1144

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

1145

flagstring, if_entry->d_name);

1148

perror_plus("ioctl SIOCGIFFLAGS");

1146

1149

}

1147

free(flagstring);

1148

return 0;

1150

return false;

1149

1151

}

1150

free(flagstring);

1151

ifreq_flags flags = (ifreq_flags)tmpmax;

1152

return true;

1153

}

1154

1155

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

1156

1152

1157

/* Reject the loopback device */

1153

if(flags & IFF_LOOPBACK){

1158

if(ifr->ifr_flags & IFF_LOOPBACK){

1154

1159

if(debug){

1155

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

1156

if_entry->d_name);

1160

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

1161

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

1157

1162

}

1158

return 0;

1163

return false;

1159

1164

}

1160

1165

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

1161

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

1166

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

1162

1167

if(debug){

1163

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

1164

if_entry->d_name);

1168

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

1169

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

1165

1170

}

1166

return 1;

1171

return true;

1167

1172

}

1168

1173

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

1169

if(not (flags & IFF_BROADCAST)){

1174

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

1170

1175

if(debug){

1171

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

1172

if_entry->d_name);

1176

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

1177

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

1173

1178

}

1174

return 0;

1179

return false;

1175

1180

}

1176

1181

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

1177

if(flags & IFF_NOARP){

1182

if(ifr->ifr_flags & IFF_NOARP){

1178

1183

if(debug){

1179

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

1180

if_entry->d_name);

1184

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

1185

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

1181

1186

}

1182

return 0;

1187

return false;

1183

1188

}

1189

1184

1190

/* Accept this device */

1185

1191

if(debug){

1186

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

1187

if_entry->d_name);

1192

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

1193

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

1194

}

1195

return true;

1196

}

1197

1198

/*

1199

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

1200

* corresponds to an acceptable network device.

1201

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

1202

*/

1203

int good_interface(const struct dirent *if_entry){

1204

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

1205

return 0;

1206

}

1207

1208

struct ifreq ifr;

1209

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

1210

if(debug){

1211

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

1212

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

1213

if_entry->d_name);

1214

}

1215

return 0;

1216

}

1217

1218

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

1219

return 0;

1220

}

1221

return 1;

1222

}

1223

1224

/*

1225

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

1226

* corresponds to an acceptable network device which is up.

1227

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

1228

*/

1229

int up_interface(const struct dirent *if_entry){

1230

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

1231

return 0;

1232

}

1233

1234

struct ifreq ifr;

1235

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

1236

if(debug){

1237

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

1238

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

1239

if_entry->d_name);

1240

}

1241

return 0;

1242

}

1243

1244

/* Reject down interfaces */

1245

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

1246

if(debug){

1247

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

1248

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

1249

if_entry->d_name);

1250

}

1251

return 0;

1252

}

1253

1254

/* Reject non-running interfaces */

1255

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

1256

if(debug){

1257

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

1258

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

1259

if_entry->d_name);

1260

}

1261

return 0;

1262

}

1263

1264

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

1265

return 0;

1188

1266

}

1189

1267

return 1;

1190

1268

}

1200

1278

return 1;

1201

1279

}

1202

1280

1281

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

1282

int runnable_hook(const struct dirent *direntry){

1283

int ret;

1284

struct stat st;

1285

1286

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

1287

/* Empty name? */

1288

return 0;

1289

}

1290

1291

/* Save pointer to last character */

1292

char *end = strchr(direntry->d_name, '\0')-1;

1293

1294

if(*end == '~'){

1295

/* Backup name~ */

1296

return 0;

1297

}

1298

1299

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

1300

and (*end == '#')){

1301

/* Temporary #name# */

1302

return 0;

1303

}

1304

1305

/* XXX more rules here */

1306

1307

ret = stat(direntry->d_name, &st);

1308

if(ret == -1){

1309

if(debug){

1310

perror_plus("Could not stat plugin");

1311

}

1312

return 0;

1313

}

1314

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

1315

/* Not a regular file */

1316

return 0;

1317

}

1318

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

1319

/* Not executable */

1320

return 0;

1321

}

1322

return 1;

1323

}

1324

1203

1325

int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){

1204

1326

int ret;

1205

1327

struct timespec now;

1206

1328

struct timespec waited_time;

1207

1329

intmax_t block_time;

1208

1330

1209

1331

while(true){

1210

1332

if(mc.current_server == NULL){

1211

1333

if (debug){

1212

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

1334

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

1335

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

1213

1336

}

1214

1337

ret = avahi_simple_poll_iterate(s, -1);

1215

1338

} else {

1216

1339

if (debug){

1217

fprintf(stderr, "Check current_server if we should run it, or wait\n");

1340

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

1341

"Check current_server if we should run it,"

1342

" or wait\n");

1218

1343

}

1219

1344

/* the current time */

1220

1345

ret = clock_gettime(CLOCK_MONOTONIC, &now);

1224

1349

}

1225

1350

/* Calculating in ms how long time between now and server

1226

1351

who we visted longest time ago. Now - last seen. */

1227

waited_time.tv_sec = now.tv_sec - mc.current_server->last_seen.tv_sec;

1228

waited_time.tv_nsec = now.tv_nsec - mc.current_server->last_seen.tv_nsec;

1229

/* total time is 10s/10000ms. Converting to s to ms by 1000/s, and ns to ms by divind by 1000000. */

1230

block_time = (retry_interval - ((intmax_t)waited_time.tv_sec * 1000)) - ((intmax_t)waited_time.tv_nsec / 1000000);

1231

1352

waited_time.tv_sec = (now.tv_sec

1353

- mc.current_server->last_seen.tv_sec);

1354

waited_time.tv_nsec = (now.tv_nsec

1355

- mc.current_server->last_seen.tv_nsec);

1356

/* total time is 10s/10,000ms.

1357

Converting to s from ms by dividing by 1,000,

1358

and ns to ms by dividing by 1,000,000. */

1359

block_time = ((retry_interval

1360

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

1361

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

1362

1232

1363

if (debug){

1233

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

1364

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

1365

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

1234

1366

}

1235

1367

1236

1368

if(block_time <= 0){

1237

1369

ret = start_mandos_communication(mc.current_server->ip,

1238

mc.current_server->port,

1239

mc.current_server->if_index,

1240

mc.current_server->af);

1370

mc.current_server->port,

1371

mc.current_server->if_index,

1372

mc.current_server->af);

1241

1373

if(ret == 0){

1242

1374

avahi_simple_poll_quit(mc.simple_poll);

1243

1375

return 0;

1244

1376

}

1245

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

1377

ret = clock_gettime(CLOCK_MONOTONIC,

1378

&mc.current_server->last_seen);

1246

1379

if(ret == -1){

1247

1380

perror_plus("clock_gettime");

1248

1381

return -1;

1249

1382

}

1250

1383

mc.current_server = mc.current_server->next;

1251

block_time = 0; /* call avahi to find new mandos servers, but dont block */

1384

block_time = 0; /* Call avahi to find new Mandos

1385

servers, but don't block */

1252

1386

}

1253

1387

1254

1388

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

1255

1389

}

1256

1390

if(ret != 0){

1257

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

1391

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

1258

1392

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

1259

1393

}

1260

1394

}

1283

1417

bool gnutls_initialized = false;

1284

1418

bool gpgme_initialized = false;

1285

1419

float delay = 2.5f;

1286

double retry_interval = 10; /* 10s between retrying a server and checking again*/

1420

double retry_interval = 10; /* 10s between trying a server and

1421

retrying the same server again */

1287

1422

1288

1423

struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };

1289

1424

struct sigaction sigterm_action = { .sa_handler = handle_sigterm };

1400

1535

errno = 0;

1401

1536

retry_interval = strtod(arg, &tmp);

1402

1537

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

1403

or (retry_interval * 1000) > INT_MAX){

1538

or (retry_interval * 1000) > INT_MAX

1539

or retry_interval < 0){

1404

1540

argp_error(state, "Bad retry interval");

1405

1541

}

1406

1542

break;

1415

1551

argp_state_help(state, state->out_stream,

1416

1552

ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);

1417

1553

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

1554

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

1418

1555

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

1419

1556

exit(argp_err_exit_status);

1420

1557

break;

1444

1581

goto end;

1445

1582

}

1446

1583

}

1584

1585

{

1586

/* Work around Debian bug #633582:

1587

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

1588

struct stat st;

1589

1590

/* Re-raise priviliges */

1591

errno = 0;

1592

ret = seteuid(0);

1593

if(ret == -1){

1594

perror_plus("seteuid");

1595

}

1596

1597

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

1598

int seckey_fd = open(seckey, O_RDONLY);

1599

if(seckey_fd == -1){

1600

perror_plus("open");

1601

} else {

1602

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

1603

if(ret == -1){

1604

perror_plus("fstat");

1605

} else {

1606

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

1607

ret = fchown(seckey_fd, uid, gid);

1608

if(ret == -1){

1609

perror_plus("fchown");

1610

}

1611

}

1612

}

1613

TEMP_FAILURE_RETRY(close(seckey_fd));

1614

}

1615

}

1616

1617

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

1618

int pubkey_fd = open(pubkey, O_RDONLY);

1619

if(pubkey_fd == -1){

1620

perror_plus("open");

1621

} else {

1622

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

1623

if(ret == -1){

1624

perror_plus("fstat");

1625

} else {

1626

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

1627

ret = fchown(pubkey_fd, uid, gid);

1628

if(ret == -1){

1629

perror_plus("fchown");

1630

}

1631

}

1632

}

1633

TEMP_FAILURE_RETRY(close(pubkey_fd));

1634

}

1635

}

1636

1637

/* Lower privileges */

1638

errno = 0;

1639

ret = seteuid(uid);

1640

if(ret == -1){

1641

perror_plus("seteuid");

1642

}

1643

}

1644

1645

/* Find network hooks and run them */

1646

{

1647

struct dirent **direntries;

1648

struct dirent *direntry;

1649

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

1650

alphasort);

1651

if(numhooks == -1){

1652

perror_plus("scandir");

1653

} else {

1654

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

1655

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

1656

direntry = direntries[0];

1657

char *fullname = NULL;

1658

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

1659

direntry->d_name);

1660

if(ret < 0){

1661

perror_plus("asprintf");

1662

continue;

1663

}

1664

pid_t hook_pid = fork();

1665

if(hook_pid == 0){

1666

/* Child */

1667

dup2(devnull, STDIN_FILENO);

1668

close(devnull);

1669

dup2(STDERR_FILENO, STDOUT_FILENO);

1670

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

1671

if(ret == -1){

1672

perror_plus("setenv");

1673

exit(1);

1674

}

1675

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

1676

if(ret == -1){

1677

perror_plus("setenv");

1678

exit(1);

1679

}

1680

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

1681

if(ret == -1){

1682

perror_plus("setenv");

1683

exit(1);

1684

}

1685

char *delaystring;

1686

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

1687

if(ret == -1){

1688

perror_plus("asprintf");

1689

exit(1);

1690

}

1691

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

1692

if(ret == -1){

1693

free(delaystring);

1694

perror_plus("setenv");

1695

exit(1);

1696

}

1697

free(delaystring);

1698

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

1699

perror_plus("execl");

1700

} else {

1701

int status;

1702

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

1703

perror_plus("waitpid");

1704

free(fullname);

1705

continue;

1706

}

1707

if(WIFEXITED(status)){

1708

if(WEXITSTATUS(status) != 0){

1709

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

1710

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

1711

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

1712

WEXITSTATUS(status));

1713

free(fullname);

1714

continue;

1715

}

1716

} else if(WIFSIGNALED(status)){

1717

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

1718

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

1719

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

1720

WTERMSIG(status));

1721

free(fullname);

1722

continue;

1723

} else {

1724

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

1725

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

1726

direntry->d_name);

1727

free(fullname);

1728

continue;

1729

}

1730

}

1731

free(fullname);

1732

if(quit_now){

1733

goto end;

1734

}

1735

}

1736

close(devnull);

1737

}

1738

}

1447

1739

1448

1740

if(not debug){

1449

1741

avahi_set_log_function(empty_log);

1450

1742

}

1451

1743

1452

1744

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

1453

1745

struct dirent **direntries;

1454

ret = scandir(sys_class_net, &direntries, good_interface,

1746

/* First look for interfaces that are up */

1747

ret = scandir(sys_class_net, &direntries, up_interface,

1455

1748

alphasort);

1749

if(ret == 0){

1750

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

1751

free(direntries);

1752

ret = scandir(sys_class_net, &direntries, good_interface,

1753

alphasort);

1754

}

1456

1755

if(ret >= 1){

1457

/* Pick the first good interface */

1756

/* Pick the first interface returned */

1458

1757

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

1459

1758

if(debug){

1460

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

1759

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

1760

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

1461

1761

}

1462

1762

if(interface == NULL){

1463

1763

perror_plus("malloc");

1468

1768

free(direntries);

1469

1769

} else {

1470

1770

free(direntries);

1471

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

1771

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

1772

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

1472

1773

exitcode = EXIT_FAILURE;

1473

1774

goto end;

1474

1775

}

1480

1781

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

1481

1782

mc.simple_poll = avahi_simple_poll_new();

1482

1783

if(mc.simple_poll == NULL){

1483

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

1784

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

1785

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

1484

1786

exitcode = EX_UNAVAILABLE;

1485

1787

goto end;

1486

1788

}

1552

1854

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

1553

1855

if_index = (AvahiIfIndex) if_nametoindex(interface);

1554

1856

if(if_index == 0){

1555

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

1857

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

1858

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

1556

1859

exitcode = EX_UNAVAILABLE;

1557

1860

goto end;

1558

1861

}

1645

1948

goto end;

1646

1949

}

1647

1950

}

1648

/* sleep checking until interface is running. Check every 0.25s, up to total time of delay */

1951

/* Sleep checking until interface is running.

1952

Check every 0.25s, up to total time of delay */

1649

1953

for(int i=0; i < delay * 4; i++){

1650

1954

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

1651

1955

if(ret == -1){

1698

2002

1699

2003

ret = init_gnutls_global(pubkey, seckey);

1700

2004

if(ret == -1){

1701

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

2005

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

2006

"init_gnutls_global failed\n");

1702

2007

exitcode = EX_UNAVAILABLE;

1703

2008

goto end;

1704

2009

} else {

1720

2025

}

1721

2026

1722

2027

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

1723

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

2028

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

2029

"init_gpgme failed\n");

1724

2030

exitcode = EX_UNAVAILABLE;

1725

2031

goto end;

1726

2032

} else {

1736

2042

/* (Mainly meant for debugging) */

1737

2043

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

1738

2044

if(address == NULL){

1739

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

2045

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

2046

"No colon in address\n");

1740

2047

exitcode = EX_USAGE;

1741

2048

goto end;

1742

2049

}

1750

2057

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

1751

2058

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

1752

2059

or tmpmax != (uint16_t)tmpmax){

1753

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

2060

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

2061

"Bad port number\n");

1754

2062

exitcode = EX_USAGE;

1755

2063

goto end;

1756

2064

}

1761

2069

1762

2070

port = (uint16_t)tmpmax;

1763

2071

*address = '\0';

1764

address = connect_to;

1765

2072

/* Colon in address indicates IPv6 */

1766

2073

int af;

1767

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

2074

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

1768

2075

af = AF_INET6;

2076

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

2077

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

2078

{

2079

connect_to++;

2080

address[-1] = '\0';

2081

}

1769

2082

} else {

1770

2083

af = AF_INET;

1771

2084

}

2085

address = connect_to;

1772

2086

1773

2087

if(quit_now){

1774

2088

goto end;

1775

2089

}

1776

2090

1777

2091

while(not quit_now){

1778

2092

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

1779

2093

if(quit_now or ret == 0){

1780

2094

break;

1781

2095

}

1782

sleep((int)retry_interval or 1);

1783

};

1784

2096

if(debug){

2097

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

2098

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

2099

}

2100

sleep((int)retry_interval);

2101

}

2102

1785

2103

if (not quit_now){

1786

2104

exitcode = EXIT_SUCCESS;

1787

2105

}

1788

2106

1789

2107

goto end;

1790

2108

}

1791

2109

1813

2131

1814

2132

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

1815

2133

if(mc.server == NULL){

1816

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

2134

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

2135

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

1817

2136

avahi_strerror(error));

1818

2137

exitcode = EX_UNAVAILABLE;

1819

2138

goto end;

1828

2147

AVAHI_PROTO_UNSPEC, "_mandos._tcp",

1829

2148

NULL, 0, browse_callback, NULL);

1830

2149

if(sb == NULL){

1831

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

2150

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

2151

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

1832

2152

avahi_strerror(avahi_server_errno(mc.server)));

1833

2153

exitcode = EX_UNAVAILABLE;

1834

2154

goto end;

1841

2161

/* Run the main loop */

1842

2162

1843

2163

if(debug){

1844

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

2164

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

2165

"Starting Avahi loop search\n");

1845

2166

}

1846

2167

1847

ret = avahi_loop_with_timeout(mc.simple_poll, (int)(retry_interval * 1000));

2168

ret = avahi_loop_with_timeout(mc.simple_poll,

2169

(int)(retry_interval * 1000));

1848

2170

if(debug){

1849

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

2171

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

2172

"avahi_loop_with_timeout exited %s\n",

1850

2173

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

1851

2174

}

1852

2175

1853

2176

end:

1854

2177

1855

2178

if(debug){

1856

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

2179

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

2180

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

1857

2181

}

1858

2182

1859

2183

/* Cleanup things */

1876

2200

gpgme_release(mc.ctx);

1877

2201

}

1878

2202

1879

/* cleans up the circular linked list of mandos servers the client has seen */

2203

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

2204

has seen */

1880

2205

if(mc.current_server != NULL){

1881

2206

mc.current_server->prev->next = NULL;

1882

2207

while(mc.current_server != NULL){

1886

2211

}

1887

2212

}

1888

2213

2214

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

2215

1889

2216

/* Take down the network interface */

1890

2217

if(take_down_interface){

1891

2218

/* Re-raise priviliges */

1898

2225

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

1899

2226

if(ret == -1){

1900

2227

perror_plus("ioctl SIOCGIFFLAGS");

1901

} else if(network.ifr_flags & IFF_UP) {

2228

} else if(network.ifr_flags & IFF_UP){

1902

2229

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

1903

2230

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

1904

2231

if(ret == -1){

1922

2249

if(tempdir_created){

1923

2250

struct dirent **direntries = NULL;

1924

2251

struct dirent *direntry = NULL;

1925

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

1926

if (ret > 0){

1927

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

2252

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

2253

alphasort);

2254

if (numentries > 0){

2255

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

1928

2256

direntry = direntries[i];

1929

2257

char *fullname = NULL;

1930

2258

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

1935

2263

}

1936

2264

ret = remove(fullname);

1937

2265

if(ret == -1){

1938

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

1939

strerror(errno));

2266

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

2267

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

1940

2268

}

1941

2269

free(fullname);

1942

2270

}

1943

2271

}

1944

2272

1945

/* need to be cleaned even if ret == 0 because man page dont specify */

2273

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

1946

2274

free(direntries);

1947

if (ret == -1){

2275

if (numentries == -1){

1948

2276

perror_plus("scandir");

1949

2277

}

1950

2278

ret = rmdir(tempdir);