/mandos/trunk : revision 144

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 */

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 */

60

91

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() */

71

92

/* GPGME */

72

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

73

#include <gpgme.h>

93

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

94

functions:

95

gpgme_*

96

GPGME_PROTOCOL_OpenPGP,

97

GPG_ERR_NO_* */

74

98

75

99

#define BUFFER_SIZE 256

76

100

77

101

bool debug = false;

78

102

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

79

103

static const char mandos_protocol_version[] = "1";

80

const char *argp_program_version = "mandosclient 0.9";

104

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

81

105

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

82

106

83

107

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

190

214

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

191

215

gpgme_strsource(rc), gpgme_strerror(rc));

192

216

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

}

193

245

goto decrypt_end;

194

246

}

195

247

197

249

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

198

250

}

199

251

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

229

252

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

230

253

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

231

254

perror("pgpme_data_seek");

258

281

}

259

282

plaintext_length += ret;

260

283

}

261

284

262

285

if(debug){

263

286

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

264

287

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

278

301

}

279

302

280

303

static const char * safer_gnutls_strerror (int value) {

281

const char *ret = gnutls_strerror (value);

304

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

282

305

if (ret == NULL)

283

306

ret = "(unknown)";

284

307

return ret;

291

314

}

292

315

293

316

static int init_gnutls_global(mandos_context *mc,

294

const char *pubkeyfile,

295

const char *seckeyfile){

317

const char *pubkeyfilename,

318

const char *seckeyfilename){

296

319

int ret;

297

320

298

321

if(debug){

299

322

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

300

323

}

301

302

if ((ret = gnutls_global_init ())

303

!= GNUTLS_E_SUCCESS) {

324

325

ret = gnutls_global_init();

326

if (ret != GNUTLS_E_SUCCESS) {

304

327

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

305

328

safer_gnutls_strerror(ret));

306

329

return -1;

315

338

}

316

339

317

340

/* OpenPGP credentials */

318

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

319

!= GNUTLS_E_SUCCESS) {

320

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

341

gnutls_certificate_allocate_credentials(&mc->cred);

342

if (ret != GNUTLS_E_SUCCESS){

343

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

344

warning */

321

345

safer_gnutls_strerror(ret));

346

gnutls_global_deinit ();

322

347

return -1;

323

348

}

324

349

325

350

if(debug){

326

351

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

327

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

328

seckeyfile);

352

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

353

seckeyfilename);

329

354

}

330

355

331

356

ret = gnutls_certificate_set_openpgp_key_file

332

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

357

(mc->cred, pubkeyfilename, seckeyfilename,

358

GNUTLS_OPENPGP_FMT_BASE64);

333

359

if (ret != GNUTLS_E_SUCCESS) {

334

360

fprintf(stderr,

335

361

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

336

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

362

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

337

363

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

338

364

safer_gnutls_strerror(ret));

339

return -1;

365

goto globalfail;

340

366

}

341

367

342

368

/* GnuTLS server initialization */

344

370

if (ret != GNUTLS_E_SUCCESS) {

345

371

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

346

372

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

347

return -1;

373

goto globalfail;

348

374

}

349

375

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

350

376

if (ret != GNUTLS_E_SUCCESS) {

351

377

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

352

378

safer_gnutls_strerror(ret));

353

return -1;

379

goto globalfail;

354

380

}

355

381

356

382

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

357

383

358

384

return 0;

385

386

globalfail:

387

388

gnutls_certificate_free_credentials(mc->cred);

389

gnutls_global_deinit();

390

return -1;

359

391

}

360

392

361

393

static int init_gnutls_session(mandos_context *mc,

375

407

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

376

408

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

377

409

safer_gnutls_strerror(ret));

410

gnutls_deinit (*session);

378

411

return -1;

379

412

}

380

413

}

384

417

if (ret != GNUTLS_E_SUCCESS) {

385

418

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

386

419

safer_gnutls_strerror(ret));

420

gnutls_deinit (*session);

387

421

return -1;

388

422

}

389

423

422

456

}

423

457

424

458

if(debug){

425

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

426

ip, port);

459

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

460

"\n", ip, port);

427

461

}

428

462

429

463

tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);

431

465

perror("socket");

432

466

return -1;

433

467

}

434

468

435

469

if(debug){

436

470

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

437

471

perror("if_indextoname");

440

474

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

441

475

}

442

476

443

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

477

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

444

478

to.in6.sin6_family = AF_INET6;

445

479

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

446

480

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

453

487

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

454

488

return -1;

455

489

}

456

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

490

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

457

491

458

492

to.in6.sin6_scope_id = (uint32_t)if_index;

459

493

460

494

if(debug){

461

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

495

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

496

port);

462

497

char addrstr[INET6_ADDRSTRLEN] = "";

463

498

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

464

499

sizeof(addrstr)) == NULL){

475

510

perror("connect");

476

511

return -1;

477

512

}

478

513

479

514

const char *out = mandos_protocol_version;

480

515

written = 0;

481

516

while (true){

499

534

}

500

535

}

501

536

}

502

537

503

538

if(debug){

504

539

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

505

540

}

506

541

507

542

gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);

508

543

509

ret = gnutls_handshake (session);

544

do{

545

ret = gnutls_handshake (session);

546

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

510

547

511

548

if (ret != GNUTLS_E_SUCCESS){

512

549

if(debug){

523

560

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

524

561

ip);

525

562

}

526

563

527

564

while(true){

528

565

buffer_capacity = adjustbuffer(&buffer, buffer_length,

529

566

buffer_capacity);

544

581

case GNUTLS_E_AGAIN:

545

582

break;

546

583

case GNUTLS_E_REHANDSHAKE:

547

ret = gnutls_handshake (session);

584

do{

585

ret = gnutls_handshake (session);

586

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

548

587

if (ret < 0){

549

588

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

550

589

gnutls_perror (ret);

595

634

} else {

596

635

retval = -1;

597

636

}

637

} else {

638

retval = -1;

598

639

}

599

640

600

641

/* Shutdown procedure */

603

644

free(buffer);

604

645

close(tcp_sd);

605

646

gnutls_deinit (session);

606

gnutls_certificate_free_credentials (mc->cred);

607

gnutls_global_deinit ();

608

647

return retval;

609

648

}

610

649

623

662

flags,

624

663

void* userdata) {

625

664

mandos_context *mc = userdata;

626

assert(r); /* Spurious warning */

665

assert(r);

627

666

628

667

/* Called whenever a service has been resolved successfully or

629

668

timed out */

641

680

char ip[AVAHI_ADDRESS_STR_MAX];

642

681

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

643

682

if(debug){

644

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

645

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

683

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

684

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

685

interface, port);

646

686

}

647

687

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

648

688

if (ret == 0){

649

exit(EXIT_SUCCESS);

689

avahi_simple_poll_quit(mc->simple_poll);

650

690

}

651

691

}

652

692

}

664

704

flags,

665

705

void* userdata) {

666

706

mandos_context *mc = userdata;

667

assert(b); /* Spurious warning */

707

assert(b);

668

708

669

709

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

670

710

is removed from the LAN */

706

746

707

747

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

708

748

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

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){

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){

714

753

return NULL;

715

754

}

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';

724

755

return tmp;

725

756

}

726

757

737

768

gid_t gid;

738

769

char *connect_to = NULL;

739

770

AvahiIfIndex if_index = AVAHI_IF_UNSPEC;

740

const char *pubkeyfile = "pubkey.txt";

741

const char *seckeyfile = "seckey.txt";

771

char *pubkeyfilename = NULL;

772

char *seckeyfilename = NULL;

773

const char *pubkeyname = "pubkey.txt";

774

const char *seckeyname = "seckey.txt";

742

775

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

743

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

776

.dh_bits = 1024, .priority = "SECURE256"

777

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

778

bool gnutls_initalized = false;

744

779

745

780

{

746

781

struct argp_option options[] = {

747

782

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

748

783

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

749

784

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

750

.arg = "IP",

751

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

785

.arg = "ADDRESS:PORT",

786

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

752

787

.group = 1 },

753

788

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

754

.arg = "INTERFACE",

755

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

789

.arg = "NAME",

790

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

791

" servers",

756

792

.group = 1 },

757

793

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

758

.arg = "KEYDIR",

759

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

794

.arg = "DIRECTORY",

795

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

760

796

.group = 1 },

761

797

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

762

.arg = "SECKEY",

763

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

798

.arg = "FILE",

799

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

764

800

.group = 1 },

765

801

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

766

.arg = "PUBKEY",

767

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

802

.arg = "FILE",

803

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

768

804

.group = 2 },

769

805

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

770

806

.arg = "BITS",

771

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

807

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

808

" Diffie-Hellman key exchange",

772

809

.group = 2 },

773

810

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

774

.arg = "PRIORITY",

775

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

811

.arg = "STRING",

812

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

813

.group = 1 },

776

814

{ .name = NULL }

777

815

};

778

779

816

780

817

error_t parse_opt (int key, char *arg,

781

818

struct argp_state *state) {

782

819

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

783

820

a pointer to our plugin list pointer. */

784

821

switch (key) {

785

case 128:

822

case 128: /* --debug */

786

823

debug = true;

787

824

break;

788

case 'c':

825

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

789

826

connect_to = arg;

790

827

break;

791

case 'i':

828

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

792

829

interface = arg;

793

830

break;

794

case 'd':

831

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

795

832

keydir = arg;

796

833

break;

797

case 's':

798

seckeyfile = arg;

799

break;

800

case 'p':

801

pubkeyfile = arg;

802

break;

803

case 129:

834

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

835

seckeyname = arg;

836

break;

837

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

838

pubkeyname = arg;

839

break;

840

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

804

841

errno = 0;

805

842

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

806

843

if (errno){

808

845

exit(EXIT_FAILURE);

809

846

}

810

847

break;

811

case 130:

848

case 130: /* --priority */

812

849

mc.priority = arg;

813

850

break;

814

851

case ARGP_KEY_ARG:

815

852

argp_usage (state);

853

case ARGP_KEY_END:

816

854

break;

817

case ARGP_KEY_END:

818

break;

819

855

default:

820

856

return ARGP_ERR_UNKNOWN;

821

857

}

822

858

return 0;

823

859

}

824

860

825

861

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

826

862

.args_doc = "",

827

863

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

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);

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);

846

888

if (ret == -1){

847

fprintf(stderr, "init_gnutls_global\n");

889

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

890

exitcode = EXIT_FAILURE;

848

891

goto end;

849

}

850

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

851

923

uid = getuid();

852

924

gid = getgid();

853

925

854

926

ret = setuid(uid);

855

927

if (ret == -1){

856

928

perror("setuid");

894

966

goto end;

895

967

}

896

968

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

924

969

if (not debug){

925

970

avahi_set_log_function(empty_log);

926

971

}

936

981

exitcode = EXIT_FAILURE;

937

982

goto end;

938

983

}

939

984

940

985

{

941

986

AvahiServerConfig config;

942

987

/* Do not publish any local Zeroconf records */

945

990

config.publish_addresses = 0;

946

991

config.publish_workstation = 0;

947

992

config.publish_domain = 0;

948

993

949

994

/* Allocate a new server */

950

995

mc.server = avahi_server_new(avahi_simple_poll_get

951

996

(mc.simple_poll), &config, NULL,

952

997

NULL, &error);

953

998

954

999

/* Free the Avahi configuration data */

955

1000

avahi_server_config_free(&config);

956

1001

}

976

1021

}

977

1022

978

1023

/* Run the main loop */

979

1024

980

1025

if (debug){

981

1026

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

982

1027

}

984

1029

avahi_simple_poll_loop(mc.simple_poll);

985

1030

986

1031

end:

987

1032

988

1033

if (debug){

989

1034

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

990

1035

}

995

1040

996

1041

if (mc.server != NULL)

997

1042

avahi_server_free(mc.server);

998

1043

999

1044

if (mc.simple_poll != NULL)

1000

1045

avahi_simple_poll_free(mc.simple_poll);

1001

free(pubkeyfile);

1002

free(seckeyfile);

1046

free(pubkeyfilename);

1047

free(seckeyfilename);

1048

1049

if (gnutls_initalized){

1050

gnutls_certificate_free_credentials(mc.cred);

1051

gnutls_global_deinit ();

1052

}

1003

1053

1004

1054

return exitcode;

1005

1055

}