/mandos/release : revision 24.1.51

32

#define _LARGEFILE_SOURCE

33

#define _FILE_OFFSET_BITS 64

34

35

#include <stdio.h>

36

#include <assert.h>

37

#include <stdlib.h>

38

#include <time.h>

39

#include <net/if.h> /* if_nametoindex */

40

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

41

SIOCSIFFLAGS */

35

#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */

36

37

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

38

ferror() */

39

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

40

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

41

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

42

srand() */

43

#include <stdbool.h> /* bool, true */

44

#include <string.h> /* memset(), strcmp(), strlen(),

45

strerror(), memcpy(), strcpy() */

46

#include <sys/ioctl.h> /* ioctl */

47

#include <sys/types.h> /* socket(), inet_pton(), sockaddr,

48

sockaddr_in6, PF_INET6,

49

SOCK_STREAM, INET6_ADDRSTRLEN,

50

uid_t, gid_t */

51

#include <inttypes.h> /* PRIu16 */

52

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

53

struct in6_addr, inet_pton(),

54

connect() */

55

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

56

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

57

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

42

58

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

43

SIOCSIFFLAGS */

59

SIOCSIFFLAGS, if_indextoname(),

60

if_nametoindex(), IF_NAMESIZE */

61

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

62

getuid(), getgid(), setuid(),

63

setgid() */

64

#include <netinet/in.h>

65

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

66

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

67

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

68

argp_state, struct argp,

69

argp_parse(), ARGP_KEY_ARG,

70

ARGP_KEY_END, ARGP_ERR_UNKNOWN */

44

71

72

/* Avahi */

73

/* All Avahi types, constants and functions

74

Avahi*, avahi_*,

75

AVAHI_* */

45

76

#include <avahi-core/core.h>

46

77

#include <avahi-core/lookup.h>

47

78

#include <avahi-core/log.h>

49

80

#include <avahi-common/malloc.h>

50

81

#include <avahi-common/error.h>

51

82

52

/* Mandos client part */

53

#include <sys/types.h> /* socket(), inet_pton() */

54

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

55

struct in6_addr, inet_pton() */

56

#include <gnutls/gnutls.h> /* All GnuTLS stuff */

57

#include <gnutls/openpgp.h> /* GnuTLS with openpgp stuff */

58

59

#include <unistd.h> /* close() */

60

#include <netinet/in.h>

61

#include <stdbool.h> /* true */

62

#include <string.h> /* memset */

63

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

64

#include <iso646.h> /* not */

65

#include <net/if.h> /* IF_NAMESIZE */

83

/* GnuTLS */

84

#include <gnutls/gnutls.h> /* All GnuTLS types, constants and functions

85

gnutls_*

86

init_gnutls_session(),

87

GNUTLS_* */

88

#include <gnutls/openpgp.h> /* gnutls_certificate_set_openpgp_key_file(),

89

GNUTLS_OPENPGP_FMT_BASE64 */

66

90

67

91

/* GPGME */

68

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

69

#include <gpgme.h>

70

71

/* getopt_long */

72

#include <getopt.h>

92

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

93

gpgme_*

94

GPGME_PROTOCOL_OpenPGP,

95

GPG_ERR_NO_* */

73

96

74

97

#define BUFFER_SIZE 256

75

98

99

bool debug = false;

76

100

static const char *keydir = "/conf/conf.d/mandos";

77

static const char *pubkeyfile = "pubkey.txt";

78

static const char *seckeyfile = "seckey.txt";

79

80

bool debug = false;

81

82

/* Used for passing in values through all the callback functions */

101

static const char mandos_protocol_version[] = "1";

102

const char *argp_program_version = "password-request 1.0";

103

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

104

105

/* Used for passing in values through the Avahi callback functions */

83

106

typedef struct {

84

107

AvahiSimplePoll *simple_poll;

85

108

AvahiServer *server;

86

109

gnutls_certificate_credentials_t cred;

87

110

unsigned int dh_bits;

111

gnutls_dh_params_t dh_params;

88

112

const char *priority;

89

113

} mandos_context;

90

114

115

/*

116

* Make room in "buffer" for at least BUFFER_SIZE additional bytes.

117

* "buffer_capacity" is how much is currently allocated,

118

* "buffer_length" is how much is already used.

119

*/

120

size_t adjustbuffer(char **buffer, size_t buffer_length,

121

size_t buffer_capacity){

122

if (buffer_length + BUFFER_SIZE > buffer_capacity){

123

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

124

if (buffer == NULL){

125

return 0;

126

}

127

buffer_capacity += BUFFER_SIZE;

128

}

129

return buffer_capacity;

130

}

131

91

132

/*

92

133

* Decrypt OpenPGP data using keyrings in HOMEDIR.

93

134

* Returns -1 on error

186

227

} else {

187

228

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

188

229

result->unsupported_algorithm);

189

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

230

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

190

231

result->wrong_key_usage);

191

232

if(result->file_name != NULL){

192

233

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

216

257

217

258

*plaintext = NULL;

218

259

while(true){

219

if (plaintext_length + BUFFER_SIZE

220

> (ssize_t) plaintext_capacity){

221

*plaintext = realloc(*plaintext, plaintext_capacity

222

+ BUFFER_SIZE);

223

if (*plaintext == NULL){

224

perror("realloc");

260

plaintext_capacity = adjustbuffer(plaintext,

261

(size_t)plaintext_length,

262

plaintext_capacity);

263

if (plaintext_capacity == 0){

264

perror("adjustbuffer");

225

265

plaintext_length = -1;

226

266

goto decrypt_end;

227

}

228

plaintext_capacity += BUFFER_SIZE;

229

267

}

230

268

231

269

ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,

274

312

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

275

313

}

276

314

277

static int initgnutls(mandos_context *mc, gnutls_session_t *session,

278

gnutls_dh_params_t *dh_params){

315

static int init_gnutls_global(mandos_context *mc,

316

const char *pubkeyfile,

317

const char *seckeyfile){

279

318

int ret;

280

319

281

320

if(debug){

282

321

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

283

322

}

284

285

if ((ret = gnutls_global_init ())

286

!= GNUTLS_E_SUCCESS) {

323

324

ret = gnutls_global_init();

325

if (ret != GNUTLS_E_SUCCESS) {

287

326

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

288

327

safer_gnutls_strerror(ret));

289

328

return -1;

298

337

}

299

338

300

339

/* OpenPGP credentials */

301

if ((ret = gnutls_certificate_allocate_credentials (&mc->cred))

302

!= GNUTLS_E_SUCCESS) {

340

gnutls_certificate_allocate_credentials(&mc->cred);

341

if (ret != GNUTLS_E_SUCCESS){

303

342

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

304

343

safer_gnutls_strerror(ret));

344

gnutls_global_deinit ();

305

345

return -1;

306

346

}

307

347

319

359

" '%s')\n", ret, pubkeyfile, seckeyfile);

320

360

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

321

361

safer_gnutls_strerror(ret));

322

return -1;

362

goto globalfail;

323

363

}

324

364

325

365

/* GnuTLS server initialization */

326

ret = gnutls_dh_params_init(dh_params);

366

ret = gnutls_dh_params_init(&mc->dh_params);

327

367

if (ret != GNUTLS_E_SUCCESS) {

328

368

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

329

369

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

330

return -1;

370

goto globalfail;

331

371

}

332

ret = gnutls_dh_params_generate2(*dh_params, mc->dh_bits);

372

ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);

333

373

if (ret != GNUTLS_E_SUCCESS) {

334

374

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

335

375

safer_gnutls_strerror(ret));

336

return -1;

376

goto globalfail;

337

377

}

338

378

339

gnutls_certificate_set_dh_params(mc->cred, *dh_params);

340

379

gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);

380

381

return 0;

382

383

globalfail:

384

385

gnutls_certificate_free_credentials(mc->cred);

386

gnutls_global_deinit();

387

return -1;

388

389

}

390

391

static int init_gnutls_session(mandos_context *mc,

392

gnutls_session_t *session){

393

int ret;

341

394

/* GnuTLS session creation */

342

395

ret = gnutls_init(session, GNUTLS_SERVER);

343

396

if (ret != GNUTLS_E_SUCCESS){

352

405

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

353

406

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

354

407

safer_gnutls_strerror(ret));

408

gnutls_deinit (*session);

355

409

return -1;

356

410

}

357

411

}

361

415

if (ret != GNUTLS_E_SUCCESS) {

362

416

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

363

417

safer_gnutls_strerror(ret));

418

gnutls_deinit (*session);

364

419

return -1;

365

420

}

366

421

382

437

AvahiIfIndex if_index,

383

438

mandos_context *mc){

384

439

int ret, tcp_sd;

385

struct sockaddr_in6 to;

440

union { struct sockaddr in; struct sockaddr_in6 in6; } to;

386

441

char *buffer = NULL;

387

442

char *decrypted_buffer;

388

443

size_t buffer_length = 0;

389

444

size_t buffer_capacity = 0;

390

445

ssize_t decrypted_buffer_size;

391

size_t written = 0;

446

size_t written;

392

447

int retval = 0;

393

448

char interface[IF_NAMESIZE];

394

449

gnutls_session_t session;

395

gnutls_dh_params_t dh_params;

396

450

397

ret = initgnutls (mc, &session, &dh_params);

451

ret = init_gnutls_session (mc, &session);

398

452

if (ret != 0){

399

453

return -1;

400

454

}

401

455

402

456

if(debug){

403

fprintf(stderr, "Setting up a tcp connection to %s, port %d\n",

404

ip, port);

457

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

458

"\n", ip, port);

405

459

}

406

460

407

461

tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);

419

473

}

420

474

421

475

memset(&to,0,sizeof(to)); /* Spurious warning */

422

to.sin6_family = AF_INET6;

476

to.in6.sin6_family = AF_INET6;

423

477

/* It would be nice to have a way to detect if we were passed an

424

478

IPv4 address here. Now we assume an IPv6 address. */

425

ret = inet_pton(AF_INET6, ip, &to.sin6_addr);

479

ret = inet_pton(AF_INET6, ip, &to.in6.sin6_addr);

426

480

if (ret < 0 ){

427

481

perror("inet_pton");

428

482

return -1;

431

485

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

432

486

return -1;

433

487

}

434

to.sin6_port = htons(port); /* Spurious warning */

488

to.in6.sin6_port = htons(port); /* Spurious warning */

435

489

436

to.sin6_scope_id = (uint32_t)if_index;

490

to.in6.sin6_scope_id = (uint32_t)if_index;

437

491

438

492

if(debug){

439

fprintf(stderr, "Connection to: %s, port %d\n", ip, port);

493

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

494

port);

440

495

char addrstr[INET6_ADDRSTRLEN] = "";

441

if(inet_ntop(to.sin6_family, &(to.sin6_addr), addrstr,

496

if(inet_ntop(to.in6.sin6_family, &(to.in6.sin6_addr), addrstr,

442

497

sizeof(addrstr)) == NULL){

443

498

perror("inet_ntop");

444

499

} else {

448

503

}

449

504

}

450

505

451

ret = connect(tcp_sd, (struct sockaddr *) &to, sizeof(to));

506

ret = connect(tcp_sd, &to.in, sizeof(to));

452

507

if (ret < 0){

453

508

perror("connect");

454

509

return -1;

455

510

}

456

511

512

const char *out = mandos_protocol_version;

513

written = 0;

514

while (true){

515

size_t out_size = strlen(out);

516

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

517

out_size - written));

518

if (ret == -1){

519

perror("write");

520

retval = -1;

521

goto mandos_end;

522

}

523

written += (size_t)ret;

524

if(written < out_size){

525

continue;

526

} else {

527

if (out == mandos_protocol_version){

528

written = 0;

529

out = "\r\n";

530

} else {

531

break;

532

}

533

}

534

}

535

457

536

if(debug){

458

537

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

459

538

}

460

539

461

540

gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);

462

463

ret = gnutls_handshake (session);

541

542

do{

543

ret = gnutls_handshake (session);

544

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

464

545

465

546

if (ret != GNUTLS_E_SUCCESS){

466

547

if(debug){

479

560

}

480

561

481

562

while(true){

482

if (buffer_length + BUFFER_SIZE > buffer_capacity){

483

buffer = realloc(buffer, buffer_capacity + BUFFER_SIZE);

484

if (buffer == NULL){

485

perror("realloc");

486

retval = -1;

487

goto mandos_end;

488

}

489

buffer_capacity += BUFFER_SIZE;

563

buffer_capacity = adjustbuffer(&buffer, buffer_length,

564

buffer_capacity);

565

if (buffer_capacity == 0){

566

perror("adjustbuffer");

567

retval = -1;

568

goto mandos_end;

490

569

}

491

570

492

571

ret = gnutls_record_recv(session, buffer+buffer_length,

500

579

case GNUTLS_E_AGAIN:

501

580

break;

502

581

case GNUTLS_E_REHANDSHAKE:

503

ret = gnutls_handshake (session);

582

do{

583

ret = gnutls_handshake (session);

584

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

504

585

if (ret < 0){

505

586

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

506

587

gnutls_perror (ret);

532

613

&decrypted_buffer,

533

614

keydir);

534

615

if (decrypted_buffer_size >= 0){

616

written = 0;

535

617

while(written < (size_t) decrypted_buffer_size){

536

618

ret = (int)fwrite (decrypted_buffer + written, 1,

537

619

(size_t)decrypted_buffer_size - written,

558

640

free(buffer);

559

641

close(tcp_sd);

560

642

gnutls_deinit (session);

561

gnutls_certificate_free_credentials (mc->cred);

562

gnutls_global_deinit ();

563

643

return retval;

564

644

}

565

645

596

676

char ip[AVAHI_ADDRESS_STR_MAX];

597

677

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

598

678

if(debug){

599

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

600

" port %d\n", name, host_name, ip, interface, port);

679

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

680

PRIu16 ") on port %d\n", name, host_name, ip,

681

interface, port);

601

682

}

602

683

int ret = start_mandos_communication(ip, port, interface, mc);

603

684

if (ret == 0){

604

exit(EXIT_SUCCESS);

685

avahi_simple_poll_quit(mc->simple_poll);

605

686

}

606

687

}

607

688

}

688

769

const char *interface = "eth0";

689

770

struct ifreq network;

690

771

int sd;

772

uid_t uid;

773

gid_t gid;

691

774

char *connect_to = NULL;

692

775

AvahiIfIndex if_index = AVAHI_IF_UNSPEC;

776

const char *pubkeyfile = "pubkey.txt";

777

const char *seckeyfile = "seckey.txt";

693

778

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

694

779

.dh_bits = 1024, .priority = "SECURE256"};

780

bool gnutls_initalized = false;

695

781

696

782

{

697

/* Temporary int to get the address of for getopt_long */

698

int debug_int = debug ? 1 : 0;

699

while (true){

700

struct option long_options[] = {

701

{"debug", no_argument, &debug_int, 1},

702

{"connect", required_argument, NULL, 'c'},

703

{"interface", required_argument, NULL, 'i'},

704

{"keydir", required_argument, NULL, 'd'},

705

{"seckey", required_argument, NULL, 's'},

706

{"pubkey", required_argument, NULL, 'p'},

707

{"dh-bits", required_argument, NULL, 'D'},

708

{"priority", required_argument, NULL, 'P'},

709

{0, 0, 0, 0} };

710

711

int option_index = 0;

712

ret = getopt_long (argc, argv, "i:", long_options,

713

&option_index);

714

715

if (ret == -1){

783

struct argp_option options[] = {

784

{ .name = "debug", .key = 128,

785

.doc = "Debug mode", .group = 3 },

786

{ .name = "connect", .key = 'c',

787

.arg = "IP",

788

.doc = "Connect directly to a sepcified mandos server",

789

.group = 1 },

790

{ .name = "interface", .key = 'i',

791

.arg = "INTERFACE",

792

.doc = "Interface that Avahi will conntect through",

793

.group = 1 },

794

{ .name = "keydir", .key = 'd',

795

.arg = "KEYDIR",

796

.doc = "Directory where the openpgp keyring is",

797

.group = 1 },

798

{ .name = "seckey", .key = 's',

799

.arg = "SECKEY",

800

.doc = "Secret openpgp key for gnutls authentication",

801

.group = 1 },

802

{ .name = "pubkey", .key = 'p',

803

.arg = "PUBKEY",

804

.doc = "Public openpgp key for gnutls authentication",

805

.group = 2 },

806

{ .name = "dh-bits", .key = 129,

807

.arg = "BITS",

808

.doc = "dh-bits to use in gnutls communication",

809

.group = 2 },

810

{ .name = "priority", .key = 130,

811

.arg = "PRIORITY",

812

.doc = "GNUTLS priority", .group = 1 },

813

{ .name = NULL }

814

};

815

816

817

error_t parse_opt (int key, char *arg,

818

struct argp_state *state) {

819

/* Get the INPUT argument from `argp_parse', which we know is

820

a pointer to our plugin list pointer. */

821

switch (key) {

822

case 128:

823

debug = true;

716

824

break;

717

}

718

719

switch(ret){

720

case 0:

825

case 'c':

826

connect_to = arg;

721

827

break;

722

828

case 'i':

723

interface = optarg;

724

break;

725

case 'c':

726

connect_to = optarg;

829

interface = arg;

727

830

break;

728

831

case 'd':

729

keydir = optarg;

832

keydir = arg;

833

break;

834

case 's':

835

seckeyfile = arg;

730

836

break;

731

837

case 'p':

732

pubkeyfile = optarg;

733

break;

734

case 's':

735

seckeyfile = optarg;

736

break;

737

case 'D':

838

pubkeyfile = arg;

839

break;

840

case 129:

738

841

errno = 0;

739

mc.dh_bits = (unsigned int) strtol(optarg, NULL, 10);

842

mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);

740

843

if (errno){

741

844

perror("strtol");

742

845

exit(EXIT_FAILURE);

743

846

}

744

847

break;

745

case 'P':

746

mc.priority = optarg;

747

break;

748

case '?':

848

case 130:

849

mc.priority = arg;

850

break;

851

case ARGP_KEY_ARG:

852

argp_usage (state);

853

case ARGP_KEY_END:

854

break;

749

855

default:

750

/* getopt_long() has already printed a message about the

751

unrcognized option, so just exit. */

752

exit(EXIT_FAILURE);

856

return ARGP_ERR_UNKNOWN;

753

857

}

754

}

755

/* Set the global debug flag from the temporary int */

756

debug = debug_int ? true : false;

858

return 0;

859

}

860

861

struct argp argp = { .options = options, .parser = parse_opt,

862

.args_doc = "",

863

.doc = "Mandos client -- Get and decrypt"

864

" passwords from mandos server" };

865

ret = argp_parse (&argp, argc, argv, 0, 0, NULL);

866

if (ret == ARGP_ERR_UNKNOWN){

867

fprintf(stderr, "Unknown error while parsing arguments\n");

868

exitcode = EXIT_FAILURE;

869

goto end;

870

}

757

871

}

758

872

759

873

pubkeyfile = combinepath(keydir, pubkeyfile);

760

874

if (pubkeyfile == NULL){

761

875

perror("combinepath");

766

880

seckeyfile = combinepath(keydir, seckeyfile);

767

881

if (seckeyfile == NULL){

768

882

perror("combinepath");

769

goto end;

883

exitcode = EXIT_FAILURE;

884

goto end;

885

}

886

887

ret = init_gnutls_global(&mc, pubkeyfile, seckeyfile);

888

if (ret == -1){

889

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

890

exitcode = EXIT_FAILURE;

891

goto end;

892

} else {

893

gnutls_initalized = true;

894

}

895

896

/* If the interface is down, bring it up */

897

{

898

sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);

899

if(sd < 0) {

900

perror("socket");

901

exitcode = EXIT_FAILURE;

902

goto end;

903

}

904

strcpy(network.ifr_name, interface); /* Spurious warning */

905

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

906

if(ret == -1){

907

perror("ioctl SIOCGIFFLAGS");

908

exitcode = EXIT_FAILURE;

909

goto end;

910

}

911

if((network.ifr_flags & IFF_UP) == 0){

912

network.ifr_flags |= IFF_UP;

913

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

914

if(ret == -1){

915

perror("ioctl SIOCSIFFLAGS");

916

exitcode = EXIT_FAILURE;

917

goto end;

918

}

919

}

920

close(sd);

921

}

922

923

uid = getuid();

924

gid = getgid();

925

926

ret = setuid(uid);

927

if (ret == -1){

928

perror("setuid");

929

}

930

931

setgid(gid);

932

if (ret == -1){

933

perror("setgid");

770

934

}

771

935

772

936

if_index = (AvahiIfIndex) if_nametoindex(interface);

781

945

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

782

946

if(address == NULL){

783

947

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

784

exit(EXIT_FAILURE);

948

exitcode = EXIT_FAILURE;

949

goto end;

785

950

}

786

951

errno = 0;

787

952

uint16_t port = (uint16_t) strtol(address+1, NULL, 10);

788

953

if(errno){

789

954

perror("Bad port number");

790

exit(EXIT_FAILURE);

955

exitcode = EXIT_FAILURE;

956

goto end;

791

957

}

792

958

*address = '\0';

793

959

address = connect_to;

794

960

ret = start_mandos_communication(address, port, if_index, &mc);

795

961

if(ret < 0){

796

exit(EXIT_FAILURE);

962

exitcode = EXIT_FAILURE;

797

963

} else {

798

exit(EXIT_SUCCESS);

799

}

800

}

801

802

/* If the interface is down, bring it up */

803

{

804

sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);

805

if(sd < 0) {

806

perror("socket");

807

exitcode = EXIT_FAILURE;

808

goto end;

809

}

810

strcpy(network.ifr_name, interface); /* Spurious warning */

811

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

812

if(ret == -1){

813

perror("ioctl SIOCGIFFLAGS");

814

exitcode = EXIT_FAILURE;

815

goto end;

816

}

817

if((network.ifr_flags & IFF_UP) == 0){

818

network.ifr_flags |= IFF_UP;

819

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

820

if(ret == -1){

821

perror("ioctl SIOCSIFFLAGS");

822

exitcode = EXIT_FAILURE;

823

goto end;

824

}

825

}

826

close(sd);

964

exitcode = EXIT_SUCCESS;

965

}

966

goto end;

827

967

}

828

968

829

969

if (not debug){

905

1045

avahi_simple_poll_free(mc.simple_poll);

906

1046

free(pubkeyfile);

907

1047

free(seckeyfile);

1048

1049

if (gnutls_initalized){

1050

gnutls_certificate_free_credentials(mc.cred);

1051

gnutls_global_deinit ();

1052

}

908

1053

909

1054

return exitcode;

910

1055

}