/mandos/trunk : revision 24.1.63

32

#define _LARGEFILE_SOURCE

33

#define _FILE_OFFSET_BITS 64

34

35

#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */

35

#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */

36

37

#include <stdio.h>

38

#include <assert.h>

39

#include <stdlib.h>

40

#include <time.h>

41

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

42

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

43

SIOCSIFFLAGS */

37

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

38

stdout, 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(), asprintf(), 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() */

44

58

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

45

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 */

46

71

72

/* Avahi */

73

/* All Avahi types, constants and functions

74

Avahi*, avahi_*,

75

AVAHI_* */

47

76

#include <avahi-core/core.h>

48

77

#include <avahi-core/lookup.h>

49

78

#include <avahi-core/log.h>

51

80

#include <avahi-common/malloc.h>

52

81

#include <avahi-common/error.h>

53

82

54

/* Mandos client part */

55

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

56

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

57

struct in6_addr, inet_pton() */

58

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

59

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

60

61

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

62

#include <netinet/in.h>

63

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

64

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

65

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

66

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

67

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

83

/* GnuTLS */

84

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

85

functions:

86

gnutls_*

87

init_gnutls_session(),

88

GNUTLS_* */

89

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

90

GNUTLS_OPENPGP_FMT_BASE64 */

68

91

69

92

/* GPGME */

70

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

71

#include <gpgme.h>

72

73

/* getopt_long */

74

#include <getopt.h>

93

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

94

functions:

95

gpgme_*

96

GPGME_PROTOCOL_OpenPGP,

97

GPG_ERR_NO_* */

75

98

76

99

#define BUFFER_SIZE 256

77

100

101

bool debug = false;

78

102

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

79

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

80

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

81

82

bool debug = false;

83

84

const char mandos_protocol_version[] = "1";

85

86

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

103

static const char mandos_protocol_version[] = "1";

104

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

105

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

106

107

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

87

108

typedef struct {

88

109

AvahiSimplePoll *simple_poll;

89

110

AvahiServer *server;

93

114

const char *priority;

94

115

} mandos_context;

95

116

117

/*

118

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

119

* "buffer_capacity" is how much is currently allocated,

120

* "buffer_length" is how much is already used.

121

*/

96

122

size_t adjustbuffer(char **buffer, size_t buffer_length,

97

123

size_t buffer_capacity){

98

124

if (buffer_length + BUFFER_SIZE > buffer_capacity){

203

229

} else {

204

230

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

205

231

result->unsupported_algorithm);

206

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

232

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

207

233

result->wrong_key_usage);

208

234

if(result->file_name != NULL){

209

235

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

233

259

234

260

*plaintext = NULL;

235

261

while(true){

236

plaintext_capacity = adjustbuffer(plaintext, (size_t)plaintext_length,

262

plaintext_capacity = adjustbuffer(plaintext,

263

(size_t)plaintext_length,

237

264

plaintext_capacity);

238

265

if (plaintext_capacity == 0){

239

266

perror("adjustbuffer");

275

302

}

276

303

277

304

static const char * safer_gnutls_strerror (int value) {

278

const char *ret = gnutls_strerror (value);

305

const char *ret = gnutls_strerror (value); /* Spurious warning */

279

306

if (ret == NULL)

280

307

ret = "(unknown)";

281

308

return ret;

287

314

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

288

315

}

289

316

290

static int init_gnutls_global(mandos_context *mc){

317

static int init_gnutls_global(mandos_context *mc,

318

const char *pubkeyfilename,

319

const char *seckeyfilename){

291

320

int ret;

292

321

293

322

if(debug){

294

323

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

295

324

}

296

297

if ((ret = gnutls_global_init ())

298

!= GNUTLS_E_SUCCESS) {

325

326

ret = gnutls_global_init();

327

if (ret != GNUTLS_E_SUCCESS) {

299

328

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

300

329

safer_gnutls_strerror(ret));

301

330

return -1;

310

339

}

311

340

312

341

/* OpenPGP credentials */

313

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

314

!= GNUTLS_E_SUCCESS) {

315

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

342

gnutls_certificate_allocate_credentials(&mc->cred);

343

if (ret != GNUTLS_E_SUCCESS){

344

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

345

warning */

316

346

safer_gnutls_strerror(ret));

347

gnutls_global_deinit ();

317

348

return -1;

318

349

}

319

350

320

351

if(debug){

321

352

fprintf(stderr, "Attempting to use OpenPGP certificate %s"

322

" and keyfile %s as GnuTLS credentials\n", pubkeyfile,

323

seckeyfile);

353

" and keyfile %s as GnuTLS credentials\n", pubkeyfilename,

354

seckeyfilename);

324

355

}

325

356

326

357

ret = gnutls_certificate_set_openpgp_key_file

327

(mc->cred, pubkeyfile, seckeyfile, GNUTLS_OPENPGP_FMT_BASE64);

358

(mc->cred, pubkeyfilename, seckeyfilename,

359

GNUTLS_OPENPGP_FMT_BASE64);

328

360

if (ret != GNUTLS_E_SUCCESS) {

329

361

fprintf(stderr,

330

362

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

331

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

363

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

332

364

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

333

365

safer_gnutls_strerror(ret));

334

return -1;

366

goto globalfail;

335

367

}

336

368

337

369

/* GnuTLS server initialization */

339

371

if (ret != GNUTLS_E_SUCCESS) {

340

372

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

341

373

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

342

return -1;

374

goto globalfail;

343

375

}

344

376

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

345

377

if (ret != GNUTLS_E_SUCCESS) {

346

378

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

347

379

safer_gnutls_strerror(ret));

348

return -1;

380

goto globalfail;

349

381

}

350

382

351

383

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

352

384

353

385

return 0;

386

387

globalfail:

388

389

gnutls_certificate_free_credentials(mc->cred);

390

gnutls_global_deinit();

391

return -1;

392

354

393

}

355

394

356

static int init_gnutls_session(mandos_context *mc, gnutls_session_t *session){

395

static int init_gnutls_session(mandos_context *mc,

396

gnutls_session_t *session){

357

397

int ret;

358

398

/* GnuTLS session creation */

359

399

ret = gnutls_init(session, GNUTLS_SERVER);

369

409

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

370

410

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

371

411

safer_gnutls_strerror(ret));

412

gnutls_deinit (*session);

372

413

return -1;

373

414

}

374

415

}

378

419

if (ret != GNUTLS_E_SUCCESS) {

379

420

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

380

421

safer_gnutls_strerror(ret));

422

gnutls_deinit (*session);

381

423

return -1;

382

424

}

383

425

399

441

AvahiIfIndex if_index,

400

442

mandos_context *mc){

401

443

int ret, tcp_sd;

402

struct sockaddr_in6 to;

444

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

403

445

char *buffer = NULL;

404

446

char *decrypted_buffer;

405

447

size_t buffer_length = 0;

409

451

int retval = 0;

410

452

char interface[IF_NAMESIZE];

411

453

gnutls_session_t session;

412

gnutls_dh_params_t dh_params;

413

454

414

455

ret = init_gnutls_session (mc, &session);

415

456

if (ret != 0){

417

458

}

418

459

419

460

if(debug){

420

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

421

ip, port);

461

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

462

"\n", ip, port);

422

463

}

423

464

424

465

tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);

435

476

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

436

477

}

437

478

438

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

439

to.sin6_family = AF_INET6;

479

memset(&to, 0, sizeof(to));

480

to.in6.sin6_family = AF_INET6;

440

481

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

441

482

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

442

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

483

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

443

484

if (ret < 0 ){

444

485

perror("inet_pton");

445

486

return -1;

448

489

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

449

490

return -1;

450

491

}

451

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

492

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

452

493

453

to.sin6_scope_id = (uint32_t)if_index;

494

to.in6.sin6_scope_id = (uint32_t)if_index;

454

495

455

496

if(debug){

456

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

497

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

498

port);

457

499

char addrstr[INET6_ADDRSTRLEN] = "";

458

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

500

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

459

501

sizeof(addrstr)) == NULL){

460

502

perror("inet_ntop");

461

503

} else {

465

507

}

466

508

}

467

509

468

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

510

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

469

511

if (ret < 0){

470

512

perror("connect");

471

513

return -1;

500

542

}

501

543

502

544

gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);

503

504

ret = gnutls_handshake (session);

545

546

do{

547

ret = gnutls_handshake (session);

548

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

505

549

506

550

if (ret != GNUTLS_E_SUCCESS){

507

551

if(debug){

520

564

}

521

565

522

566

while(true){

523

buffer_capacity = adjustbuffer(&buffer, buffer_length, buffer_capacity);

567

buffer_capacity = adjustbuffer(&buffer, buffer_length,

568

buffer_capacity);

524

569

if (buffer_capacity == 0){

525

570

perror("adjustbuffer");

526

571

retval = -1;

538

583

case GNUTLS_E_AGAIN:

539

584

break;

540

585

case GNUTLS_E_REHANDSHAKE:

541

ret = gnutls_handshake (session);

586

do{

587

ret = gnutls_handshake (session);

588

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

542

589

if (ret < 0){

543

590

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

544

591

gnutls_perror (ret);

589

636

} else {

590

637

retval = -1;

591

638

}

639

} else {

640

retval = -1;

592

641

}

593

642

594

643

/* Shutdown procedure */

597

646

free(buffer);

598

647

close(tcp_sd);

599

648

gnutls_deinit (session);

600

gnutls_certificate_free_credentials (mc->cred);

601

gnutls_global_deinit ();

602

649

return retval;

603

650

}

604

651

617

664

flags,

618

665

void* userdata) {

619

666

mandos_context *mc = userdata;

620

assert(r); /* Spurious warning */

667

assert(r);

621

668

622

669

/* Called whenever a service has been resolved successfully or

623

670

timed out */

635

682

char ip[AVAHI_ADDRESS_STR_MAX];

636

683

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

637

684

if(debug){

638

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

639

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

685

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

686

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

687

interface, port);

640

688

}

641

689

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

642

690

if (ret == 0){

643

exit(EXIT_SUCCESS);

691

avahi_simple_poll_quit(mc->simple_poll);

644

692

}

645

693

}

646

694

}

658

706

flags,

659

707

void* userdata) {

660

708

mandos_context *mc = userdata;

661

assert(b); /* Spurious warning */

709

assert(b);

662

710

663

711

/* Called whenever a new services becomes available on the LAN or

664

712

is removed from the LAN */

700

748

701

749

/* Combines file name and path and returns the malloced new

702

750

string. some sane checks could/should be added */

703

static const char *combinepath(const char *first, const char *second){

704

size_t f_len = strlen(first);

705

size_t s_len = strlen(second);

706

char *tmp = malloc(f_len + s_len + 2);

707

if (tmp == NULL){

751

static char *combinepath(const char *first, const char *second){

752

char *tmp;

753

int ret = asprintf(&tmp, "%s/%s", first, second);

754

if(ret < 0){

708

755

return NULL;

709

756

}

710

if(f_len > 0){

711

memcpy(tmp, first, f_len); /* Spurious warning */

712

}

713

tmp[f_len] = '/';

714

if(s_len > 0){

715

memcpy(tmp + f_len + 1, second, s_len); /* Spurious warning */

716

}

717

tmp[f_len + 1 + s_len] = '\0';

718

757

return tmp;

719

758

}

720

759

731

770

gid_t gid;

732

771

char *connect_to = NULL;

733

772

AvahiIfIndex if_index = AVAHI_IF_UNSPEC;

773

char *pubkeyfilename = NULL;

774

char *seckeyfilename = NULL;

775

const char *pubkeyname = "pubkey.txt";

776

const char *seckeyname = "seckey.txt";

734

777

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

735

778

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

779

bool gnutls_initalized = false;

736

780

737

781

{

738

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

739

int debug_int = debug ? 1 : 0;

740

while (true){

741

struct option long_options[] = {

742

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

743

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

744

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

745

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

746

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

747

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

748

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

749

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

750

{0, 0, 0, 0} };

751

752

int option_index = 0;

753

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

754

&option_index);

755

756

if (ret == -1){

782

struct argp_option options[] = {

783

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

784

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

785

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

786

.arg = "IP",

787

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

788

.group = 1 },

789

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

790

.arg = "INTERFACE",

791

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

792

.group = 1 },

793

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

794

.arg = "KEYDIR",

795

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

796

.group = 1 },

797

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

798

.arg = "SECKEY",

799

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

800

.group = 1 },

801

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

802

.arg = "PUBKEY",

803

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

804

.group = 2 },

805

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

806

.arg = "BITS",

807

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

808

.group = 2 },

809

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

810

.arg = "PRIORITY",

811

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

812

{ .name = NULL }

813

};

814

815

816

error_t parse_opt (int key, char *arg,

817

struct argp_state *state) {

818

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

819

a pointer to our plugin list pointer. */

820

switch (key) {

821

case 128:

822

debug = true;

757

823

break;

758

}

759

760

switch(ret){

761

case 0:

824

case 'c':

825

connect_to = arg;

762

826

break;

763

827

case 'i':

764

interface = optarg;

765

break;

766

case 'c':

767

connect_to = optarg;

828

interface = arg;

768

829

break;

769

830

case 'd':

770

keydir = optarg;

831

keydir = arg;

832

break;

833

case 's':

834

seckeyname = arg;

771

835

break;

772

836

case 'p':

773

pubkeyfile = optarg;

774

break;

775

case 's':

776

seckeyfile = optarg;

777

break;

778

case 'D':

837

pubkeyname = arg;

838

break;

839

case 129:

779

840

errno = 0;

780

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

841

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

781

842

if (errno){

782

843

perror("strtol");

783

844

exit(EXIT_FAILURE);

784

845

}

785

846

break;

786

case 'P':

787

mc.priority = optarg;

788

break;

789

case '?':

847

case 130:

848

mc.priority = arg;

849

break;

850

case ARGP_KEY_ARG:

851

argp_usage (state);

852

case ARGP_KEY_END:

853

break;

790

854

default:

791

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

792

unrcognized option, so just exit. */

793

exit(EXIT_FAILURE);

855

return ARGP_ERR_UNKNOWN;

794

856

}

795

}

796

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

797

debug = debug_int ? true : false;

798

}

799

800

pubkeyfile = combinepath(keydir, pubkeyfile);

801

if (pubkeyfile == NULL){

802

perror("combinepath");

803

exitcode = EXIT_FAILURE;

804

goto end;

805

}

806

807

seckeyfile = combinepath(keydir, seckeyfile);

808

if (seckeyfile == NULL){

809

perror("combinepath");

810

goto end;

811

}

812

813

ret = init_gnutls_global(&mc);

857

return 0;

858

}

859

860

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

861

.args_doc = "",

862

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

863

" passwords from mandos server" };

864

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

865

if (ret == ARGP_ERR_UNKNOWN){

866

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

867

exitcode = EXIT_FAILURE;

868

goto end;

869

}

870

}

871

872

pubkeyfilename = combinepath(keydir, pubkeyname);

873

if (pubkeyfilename == NULL){

874

perror("combinepath");

875

exitcode = EXIT_FAILURE;

876

goto end;

877

}

878

879

seckeyfilename = combinepath(keydir, seckeyname);

880

if (seckeyfilename == NULL){

881

perror("combinepath");

882

exitcode = EXIT_FAILURE;

883

goto end;

884

}

885

886

ret = init_gnutls_global(&mc, pubkeyfilename, seckeyfilename);

814

887

if (ret == -1){

815

fprintf(stderr, "init_gnutls_global\n");

888

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

889

exitcode = EXIT_FAILURE;

816

890

goto end;

817

}

818

891

} else {

892

gnutls_initalized = true;

893

}

894

895

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

896

{

897

sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);

898

if(sd < 0) {

899

perror("socket");

900

exitcode = EXIT_FAILURE;

901

goto end;

902

}

903

strcpy(network.ifr_name, interface);

904

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

905

if(ret == -1){

906

perror("ioctl SIOCGIFFLAGS");

907

exitcode = EXIT_FAILURE;

908

goto end;

909

}

910

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

911

network.ifr_flags |= IFF_UP;

912

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

913

if(ret == -1){

914

perror("ioctl SIOCSIFFLAGS");

915

exitcode = EXIT_FAILURE;

916

goto end;

917

}

918

}

919

close(sd);

920

}

921

819

922

uid = getuid();

820

923

gid = getgid();

821

924

822

925

ret = setuid(uid);

823

926

if (ret == -1){

824

927

perror("setuid");

862

965

goto end;

863

966

}

864

967

865

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

866

{

867

sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);

868

if(sd < 0) {

869

perror("socket");

870

exitcode = EXIT_FAILURE;

871

goto end;

872

}

873

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

874

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

875

if(ret == -1){

876

perror("ioctl SIOCGIFFLAGS");

877

exitcode = EXIT_FAILURE;

878

goto end;

879

}

880

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

881

network.ifr_flags |= IFF_UP;

882

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

883

if(ret == -1){

884

perror("ioctl SIOCSIFFLAGS");

885

exitcode = EXIT_FAILURE;

886

goto end;

887

}

888

}

889

close(sd);

890

}

891

892

968

if (not debug){

893

969

avahi_set_log_function(empty_log);

894

970

}

966

1042

967

1043

if (mc.simple_poll != NULL)

968

1044

avahi_simple_poll_free(mc.simple_poll);

969

free(pubkeyfile);

970

free(seckeyfile);

1045

free(pubkeyfilename);

1046

free(seckeyfilename);

1047

1048

if (gnutls_initalized){

1049

gnutls_certificate_free_credentials(mc.cred);

1050

gnutls_global_deinit ();

1051

}

971

1052

972

1053

return exitcode;

973

1054

}