/mandos/release : revision 24.1.19

32

#define _LARGEFILE_SOURCE

33

#define _FILE_OFFSET_BITS 64

34

35

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

35

#define _GNU_SOURCE /* TEMP_FAILURE_RETRY() */

36

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() */

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 */

58

44

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

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 */

45

SIOCSIFFLAGS */

71

46

72

/* Avahi */

73

/* All Avahi types, constants and functions

74

Avahi*, avahi_*,

75

AVAHI_* */

76

47

#include <avahi-core/core.h>

77

48

#include <avahi-core/lookup.h>

78

49

#include <avahi-core/log.h>

80

51

#include <avahi-common/malloc.h>

81

52

#include <avahi-common/error.h>

82

53

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 */

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 */

91

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 */

68

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

69

struct argp_state, struct argp,

70

argp_parse() */

92

71

/* GPGME */

93

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

94

functions:

95

gpgme_*

96

GPGME_PROTOCOL_OpenPGP,

97

GPG_ERR_NO_* */

72

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

73

#include <gpgme.h>

98

74

99

75

#define BUFFER_SIZE 256

100

76

101

77

bool debug = false;

102

78

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

103

79

static const char mandos_protocol_version[] = "1";

104

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

80

const char *argp_program_version = "mandosclient 0.9";

105

81

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

106

82

107

83

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

214

190

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

215

191

gpgme_strsource(rc), gpgme_strerror(rc));

216

192

plaintext_length = -1;

217

if (debug){

218

gpgme_decrypt_result_t result;

219

result = gpgme_op_decrypt_result(ctx);

220

if (result == NULL){

221

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

222

} else {

223

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

224

result->unsupported_algorithm);

225

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

226

result->wrong_key_usage);

227

if(result->file_name != NULL){

228

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

229

}

230

gpgme_recipient_t recipient;

231

recipient = result->recipients;

232

if(recipient){

233

while(recipient != NULL){

234

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

235

gpgme_pubkey_algo_name(recipient->pubkey_algo));

236

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

237

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

238

recipient->status == GPG_ERR_NO_SECKEY

239

? "No" : "Yes");

240

recipient = recipient->next;

241

}

242

}

243

}

244

}

245

193

goto decrypt_end;

246

194

}

247

195

249

197

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

250

198

}

251

199

200

if (debug){

201

gpgme_decrypt_result_t result;

202

result = gpgme_op_decrypt_result(ctx);

203

if (result == NULL){

204

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

205

} else {

206

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

207

result->unsupported_algorithm);

208

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

209

result->wrong_key_usage);

210

if(result->file_name != NULL){

211

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

212

}

213

gpgme_recipient_t recipient;

214

recipient = result->recipients;

215

if(recipient){

216

while(recipient != NULL){

217

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

218

gpgme_pubkey_algo_name(recipient->pubkey_algo));

219

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

220

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

221

recipient->status == GPG_ERR_NO_SECKEY

222

? "No" : "Yes");

223

recipient = recipient->next;

224

}

225

}

226

}

227

}

228

252

229

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

253

230

if (gpgme_data_seek(dh_plain, (off_t) 0, SEEK_SET) == -1){

254

231

perror("pgpme_data_seek");

281

258

}

282

259

plaintext_length += ret;

283

260

}

284

261

285

262

if(debug){

286

263

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

287

264

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

301

278

}

302

279

303

280

static const char * safer_gnutls_strerror (int value) {

304

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

281

const char *ret = gnutls_strerror (value);

305

282

if (ret == NULL)

306

283

ret = "(unknown)";

307

284

return ret;

314

291

}

315

292

316

293

static int init_gnutls_global(mandos_context *mc,

317

const char *pubkeyfilename,

318

const char *seckeyfilename){

294

const char *pubkeyfile,

295

const char *seckeyfile){

319

296

int ret;

320

297

321

298

if(debug){

322

299

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

323

300

}

324

325

ret = gnutls_global_init();

326

if (ret != GNUTLS_E_SUCCESS) {

301

302

if ((ret = gnutls_global_init ())

303

!= GNUTLS_E_SUCCESS) {

327

304

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

328

305

safer_gnutls_strerror(ret));

329

306

return -1;

338

315

}

339

316

340

317

/* OpenPGP credentials */

341

gnutls_certificate_allocate_credentials(&mc->cred);

342

if (ret != GNUTLS_E_SUCCESS){

343

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

344

warning */

318

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

319

!= GNUTLS_E_SUCCESS) {

320

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

345

321

safer_gnutls_strerror(ret));

346

gnutls_global_deinit ();

347

322

return -1;

348

323

}

349

324

350

325

if(debug){

351

326

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

352

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

353

seckeyfilename);

327

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

328

seckeyfile);

354

329

}

355

330

356

331

ret = gnutls_certificate_set_openpgp_key_file

357

(mc->cred, pubkeyfilename, seckeyfilename,

358

GNUTLS_OPENPGP_FMT_BASE64);

332

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

359

333

if (ret != GNUTLS_E_SUCCESS) {

360

334

fprintf(stderr,

361

335

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

362

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

336

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

363

337

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

364

338

safer_gnutls_strerror(ret));

365

goto globalfail;

339

return -1;

366

340

}

367

341

368

342

/* GnuTLS server initialization */

370

344

if (ret != GNUTLS_E_SUCCESS) {

371

345

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

372

346

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

373

goto globalfail;

347

return -1;

374

348

}

375

349

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

376

350

if (ret != GNUTLS_E_SUCCESS) {

377

351

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

378

352

safer_gnutls_strerror(ret));

379

goto globalfail;

353

return -1;

380

354

}

381

355

382

356

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

383

357

384

358

return 0;

385

386

globalfail:

387

388

gnutls_certificate_free_credentials(mc->cred);

389

gnutls_global_deinit();

390

return -1;

391

359

}

392

360

393

361

static int init_gnutls_session(mandos_context *mc,

407

375

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

408

376

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

409

377

safer_gnutls_strerror(ret));

410

gnutls_deinit (*session);

411

378

return -1;

412

379

}

413

380

}

417

384

if (ret != GNUTLS_E_SUCCESS) {

418

385

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

419

386

safer_gnutls_strerror(ret));

420

gnutls_deinit (*session);

421

387

return -1;

422

388

}

423

389

456

422

}

457

423

458

424

if(debug){

459

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

460

"\n", ip, port);

425

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

426

ip, port);

461

427

}

462

428

463

429

tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);

465

431

perror("socket");

466

432

return -1;

467

433

}

468

434

469

435

if(debug){

470

436

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

471

437

perror("if_indextoname");

474

440

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

475

441

}

476

442

477

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

443

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

478

444

to.in6.sin6_family = AF_INET6;

479

445

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

480

446

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

487

453

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

488

454

return -1;

489

455

}

490

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

456

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

491

457

492

458

to.in6.sin6_scope_id = (uint32_t)if_index;

493

459

494

460

if(debug){

495

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

496

port);

461

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

497

462

char addrstr[INET6_ADDRSTRLEN] = "";

498

463

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

499

464

sizeof(addrstr)) == NULL){

510

475

perror("connect");

511

476

return -1;

512

477

}

513

478

514

479

const char *out = mandos_protocol_version;

515

480

written = 0;

516

481

while (true){

534

499

}

535

500

}

536

501

}

537

502

538

503

if(debug){

539

504

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

540

505

}

541

506

542

507

gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);

543

508

544

do{

545

ret = gnutls_handshake (session);

546

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

509

ret = gnutls_handshake (session);

547

510

548

511

if (ret != GNUTLS_E_SUCCESS){

549

512

if(debug){

560

523

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

561

524

ip);

562

525

}

563

526

564

527

while(true){

565

528

buffer_capacity = adjustbuffer(&buffer, buffer_length,

566

529

buffer_capacity);

581

544

case GNUTLS_E_AGAIN:

582

545

break;

583

546

case GNUTLS_E_REHANDSHAKE:

584

do{

585

ret = gnutls_handshake (session);

586

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

547

ret = gnutls_handshake (session);

587

548

if (ret < 0){

588

549

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

589

550

gnutls_perror (ret);

634

595

} else {

635

596

retval = -1;

636

597

}

637

} else {

638

retval = -1;

639

598

}

640

599

641

600

/* Shutdown procedure */

644

603

free(buffer);

645

604

close(tcp_sd);

646

605

gnutls_deinit (session);

606

gnutls_certificate_free_credentials (mc->cred);

607

gnutls_global_deinit ();

647

608

return retval;

648

609

}

649

610

662

623

flags,

663

624

void* userdata) {

664

625

mandos_context *mc = userdata;

665

assert(r);

626

assert(r); /* Spurious warning */

666

627

667

628

/* Called whenever a service has been resolved successfully or

668

629

timed out */

680

641

char ip[AVAHI_ADDRESS_STR_MAX];

681

642

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

682

643

if(debug){

683

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

684

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

685

interface, port);

644

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

645

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

686

646

}

687

647

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

688

648

if (ret == 0){

689

avahi_simple_poll_quit(mc->simple_poll);

649

exit(EXIT_SUCCESS);

690

650

}

691

651

}

692

652

}

704

664

flags,

705

665

void* userdata) {

706

666

mandos_context *mc = userdata;

707

assert(b);

667

assert(b); /* Spurious warning */

708

668

709

669

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

710

670

is removed from the LAN */

746

706

747

707

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

748

708

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

749

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

750

char *tmp;

751

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

752

if(ret < 0){

709

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

710

size_t f_len = strlen(first);

711

size_t s_len = strlen(second);

712

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

713

if (tmp == NULL){

753

714

return NULL;

754

715

}

716

if(f_len > 0){

717

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

718

}

719

tmp[f_len] = '/';

720

if(s_len > 0){

721

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

722

}

723

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

755

724

return tmp;

756

725

}

757

726

768

737

gid_t gid;

769

738

char *connect_to = NULL;

770

739

AvahiIfIndex if_index = AVAHI_IF_UNSPEC;

771

char *pubkeyfilename = NULL;

772

char *seckeyfilename = NULL;

773

const char *pubkeyname = "pubkey.txt";

774

const char *seckeyname = "seckey.txt";

740

const char *pubkeyfile = "pubkey.txt";

741

const char *seckeyfile = "seckey.txt";

775

742

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

776

.dh_bits = 1024, .priority = "SECURE256"

777

":!CTYPE-X.509:+CTYPE-OPENPGP" };

778

bool gnutls_initalized = false;

743

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

779

744

780

745

{

781

746

struct argp_option options[] = {

782

747

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

783

748

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

784

749

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

785

.arg = "ADDRESS:PORT",

786

.doc = "Connect directly to a specific Mandos server",

750

.arg = "IP",

751

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

787

752

.group = 1 },

788

753

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

789

.arg = "NAME",

790

.doc = "Interface that will be used to search for Mandos"

791

" servers",

754

.arg = "INTERFACE",

755

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

792

756

.group = 1 },

793

757

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

794

.arg = "DIRECTORY",

795

.doc = "Directory to read the OpenPGP key files from",

758

.arg = "KEYDIR",

759

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

796

760

.group = 1 },

797

761

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

798

.arg = "FILE",

799

.doc = "OpenPGP secret key file base name",

762

.arg = "SECKEY",

763

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

800

764

.group = 1 },

801

765

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

802

.arg = "FILE",

803

.doc = "OpenPGP public key file base name",

766

.arg = "PUBKEY",

767

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

804

768

.group = 2 },

805

769

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

806

770

.arg = "BITS",

807

.doc = "Bit length of the prime number used in the"

808

" Diffie-Hellman key exchange",

771

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

809

772

.group = 2 },

810

773

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

811

.arg = "STRING",

812

.doc = "GnuTLS priority string for the TLS handshake",

813

.group = 1 },

774

.arg = "PRIORITY",

775

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

814

776

{ .name = NULL }

815

777

};

778

816

779

817

780

error_t parse_opt (int key, char *arg,

818

781

struct argp_state *state) {

819

782

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

820

783

a pointer to our plugin list pointer. */

821

784

switch (key) {

822

case 128: /* --debug */

785

case 128:

823

786

debug = true;

824

787

break;

825

case 'c': /* --connect */

788

case 'c':

826

789

connect_to = arg;

827

790

break;

828

case 'i': /* --interface */

791

case 'i':

829

792

interface = arg;

830

793

break;

831

case 'd': /* --keydir */

794

case 'd':

832

795

keydir = arg;

833

796

break;

834

case 's': /* --seckey */

835

seckeyname = arg;

836

break;

837

case 'p': /* --pubkey */

838

pubkeyname = arg;

839

break;

840

case 129: /* --dh-bits */

797

case 's':

798

seckeyfile = arg;

799

break;

800

case 'p':

801

pubkeyfile = arg;

802

break;

803

case 129:

841

804

errno = 0;

842

805

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

843

806

if (errno){

845

808

exit(EXIT_FAILURE);

846

809

}

847

810

break;

848

case 130: /* --priority */

811

case 130:

849

812

mc.priority = arg;

850

813

break;

851

814

case ARGP_KEY_ARG:

852

815

argp_usage (state);

853

case ARGP_KEY_END:

854

816

break;

817

case ARGP_KEY_END:

818

break;

855

819

default:

856

820

return ARGP_ERR_UNKNOWN;

857

821

}

858

822

return 0;

859

823

}

860

824

861

825

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

862

826

.args_doc = "",

863

827

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

864

" passwords from a 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

}

871

}

872

873

pubkeyfilename = combinepath(keydir, pubkeyname);

874

if (pubkeyfilename == NULL){

875

perror("combinepath");

876

exitcode = EXIT_FAILURE;

877

goto end;

878

}

879

880

seckeyfilename = combinepath(keydir, seckeyname);

881

if (seckeyfilename == NULL){

882

perror("combinepath");

883

exitcode = EXIT_FAILURE;

884

goto end;

885

}

886

887

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

828

" passwords from mandos server" };

829

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

830

}

831

832

pubkeyfile = combinepath(keydir, pubkeyfile);

833

if (pubkeyfile == NULL){

834

perror("combinepath");

835

exitcode = EXIT_FAILURE;

836

goto end;

837

}

838

839

seckeyfile = combinepath(keydir, seckeyfile);

840

if (seckeyfile == NULL){

841

perror("combinepath");

842

goto end;

843

}

844

845

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

888

846

if (ret == -1){

889

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

890

exitcode = EXIT_FAILURE;

847

fprintf(stderr, "init_gnutls_global\n");

891

848

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);

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

849

}

850

923

851

uid = getuid();

924

852

gid = getgid();

925

853

926

854

ret = setuid(uid);

927

855

if (ret == -1){

928

856

perror("setuid");

966

894

goto end;

967

895

}

968

896

897

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

898

{

899

sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);

900

if(sd < 0) {

901

perror("socket");

902

exitcode = EXIT_FAILURE;

903

goto end;

904

}

905

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

906

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

907

if(ret == -1){

908

perror("ioctl SIOCGIFFLAGS");

909

exitcode = EXIT_FAILURE;

910

goto end;

911

}

912

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

913

network.ifr_flags |= IFF_UP;

914

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

915

if(ret == -1){

916

perror("ioctl SIOCSIFFLAGS");

917

exitcode = EXIT_FAILURE;

918

goto end;

919

}

920

}

921

close(sd);

922

}

923

969

924

if (not debug){

970

925

avahi_set_log_function(empty_log);

971

926

}

981

936

exitcode = EXIT_FAILURE;

982

937

goto end;

983

938

}

984

939

985

940

{

986

941

AvahiServerConfig config;

987

942

/* Do not publish any local Zeroconf records */

990

945

config.publish_addresses = 0;

991

946

config.publish_workstation = 0;

992

947

config.publish_domain = 0;

993

948

994

949

/* Allocate a new server */

995

950

mc.server = avahi_server_new(avahi_simple_poll_get

996

951

(mc.simple_poll), &config, NULL,

997

952

NULL, &error);

998

953

999

954

/* Free the Avahi configuration data */

1000

955

avahi_server_config_free(&config);

1001

956

}

1021

976

}

1022

977

1023

978

/* Run the main loop */

1024

979

1025

980

if (debug){

1026

981

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

1027

982

}

1029

984

avahi_simple_poll_loop(mc.simple_poll);

1030

985

1031

986

end:

1032

987

1033

988

if (debug){

1034

989

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

1035

990

}

1040

995

1041

996

if (mc.server != NULL)

1042

997

avahi_server_free(mc.server);

1043

998

1044

999

if (mc.simple_poll != NULL)

1045

1000

avahi_simple_poll_free(mc.simple_poll);

1046

free(pubkeyfilename);

1047

free(seckeyfilename);

1048

1049

if (gnutls_initalized){

1050

gnutls_certificate_free_credentials(mc.cred);

1051

gnutls_global_deinit ();

1052

}

1001

free(pubkeyfile);

1002

free(seckeyfile);

1053

1003

1054

1004

return exitcode;

1055

1005

}