/mandos/release : revision 101

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

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

79

const char *argp_program_version = "mandosclient 0.9";

102

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

103

static const char mandos_protocol_version[] = "1";

104

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

80

105

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

81

const char mandos_protocol_version[] = "1";

82

106

83

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

107

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

84

108

typedef struct {

85

109

AvahiSimplePoll *simple_poll;

86

110

AvahiServer *server;

90

114

const char *priority;

91

115

} mandos_context;

92

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

*/

93

122

size_t adjustbuffer(char **buffer, size_t buffer_length,

94

123

size_t buffer_capacity){

95

124

if (buffer_length + BUFFER_SIZE > buffer_capacity){

185

214

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

186

215

gpgme_strsource(rc), gpgme_strerror(rc));

187

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

}

188

245

goto decrypt_end;

189

246

}

190

247

192

249

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

193

250

}

194

251

195

if (debug){

196

gpgme_decrypt_result_t result;

197

result = gpgme_op_decrypt_result(ctx);

198

if (result == NULL){

199

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

200

} else {

201

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

202

result->unsupported_algorithm);

203

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

204

result->wrong_key_usage);

205

if(result->file_name != NULL){

206

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

207

}

208

gpgme_recipient_t recipient;

209

recipient = result->recipients;

210

if(recipient){

211

while(recipient != NULL){

212

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

213

gpgme_pubkey_algo_name(recipient->pubkey_algo));

214

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

215

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

216

recipient->status == GPG_ERR_NO_SECKEY

217

? "No" : "Yes");

218

recipient = recipient->next;

219

}

220

}

221

}

222

}

223

224

252

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

225

253

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

226

254

perror("pgpme_data_seek");

230

258

231

259

*plaintext = NULL;

232

260

while(true){

233

plaintext_capacity = adjustbuffer(plaintext, (size_t)plaintext_length,

261

plaintext_capacity = adjustbuffer(plaintext,

262

(size_t)plaintext_length,

234

263

plaintext_capacity);

235

264

if (plaintext_capacity == 0){

236

265

perror("adjustbuffer");

272

301

}

273

302

274

303

static const char * safer_gnutls_strerror (int value) {

275

const char *ret = gnutls_strerror (value);

304

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

276

305

if (ret == NULL)

277

306

ret = "(unknown)";

278

307

return ret;

285

314

}

286

315

287

316

static int init_gnutls_global(mandos_context *mc,

288

const char *pubkeyfile,

289

const char *seckeyfile){

317

const char *pubkeyfilename,

318

const char *seckeyfilename){

290

319

int ret;

291

320

292

321

if(debug){

293

322

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

294

323

}

295

296

if ((ret = gnutls_global_init ())

297

!= GNUTLS_E_SUCCESS) {

324

325

ret = gnutls_global_init();

326

if (ret != GNUTLS_E_SUCCESS) {

298

327

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

299

328

safer_gnutls_strerror(ret));

300

329

return -1;

309

338

}

310

339

311

340

/* OpenPGP credentials */

312

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

313

!= GNUTLS_E_SUCCESS) {

314

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 */

315

345

safer_gnutls_strerror(ret));

346

gnutls_global_deinit ();

316

347

return -1;

317

348

}

318

349

319

350

if(debug){

320

351

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

321

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

322

seckeyfile);

352

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

353

seckeyfilename);

323

354

}

324

355

325

356

ret = gnutls_certificate_set_openpgp_key_file

326

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

357

(mc->cred, pubkeyfilename, seckeyfilename,

358

GNUTLS_OPENPGP_FMT_BASE64);

327

359

if (ret != GNUTLS_E_SUCCESS) {

328

360

fprintf(stderr,

329

361

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

330

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

362

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

331

363

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

332

364

safer_gnutls_strerror(ret));

333

return -1;

365

goto globalfail;

334

366

}

335

367

336

368

/* GnuTLS server initialization */

338

370

if (ret != GNUTLS_E_SUCCESS) {

339

371

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

340

372

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

341

return -1;

373

goto globalfail;

342

374

}

343

375

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

344

376

if (ret != GNUTLS_E_SUCCESS) {

345

377

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

346

378

safer_gnutls_strerror(ret));

347

return -1;

379

goto globalfail;

348

380

}

349

381

350

382

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

351

383

352

384

return 0;

385

386

globalfail:

387

388

gnutls_certificate_free_credentials(mc->cred);

389

gnutls_global_deinit();

390

return -1;

391

353

392

}

354

393

355

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

394

static int init_gnutls_session(mandos_context *mc,

395

gnutls_session_t *session){

356

396

int ret;

357

397

/* GnuTLS session creation */

358

398

ret = gnutls_init(session, GNUTLS_SERVER);

368

408

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

369

409

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

370

410

safer_gnutls_strerror(ret));

411

gnutls_deinit (*session);

371

412

return -1;

372

413

}

373

414

}

377

418

if (ret != GNUTLS_E_SUCCESS) {

378

419

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

379

420

safer_gnutls_strerror(ret));

421

gnutls_deinit (*session);

380

422

return -1;

381

423

}

382

424

398

440

AvahiIfIndex if_index,

399

441

mandos_context *mc){

400

442

int ret, tcp_sd;

401

struct sockaddr_in6 to;

443

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

402

444

char *buffer = NULL;

403

445

char *decrypted_buffer;

404

446

size_t buffer_length = 0;

408

450

int retval = 0;

409

451

char interface[IF_NAMESIZE];

410

452

gnutls_session_t session;

411

gnutls_dh_params_t dh_params;

412

453

413

454

ret = init_gnutls_session (mc, &session);

414

455

if (ret != 0){

416

457

}

417

458

418

459

if(debug){

419

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

420

ip, port);

460

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

461

"\n", ip, port);

421

462

}

422

463

423

464

tcp_sd = socket(PF_INET6, SOCK_STREAM, 0);

434

475

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

435

476

}

436

477

437

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

438

to.sin6_family = AF_INET6;

478

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

479

to.in6.sin6_family = AF_INET6;

439

480

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

440

481

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

441

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

482

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

442

483

if (ret < 0 ){

443

484

perror("inet_pton");

444

485

return -1;

447

488

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

448

489

return -1;

449

490

}

450

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

491

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

451

492

452

to.sin6_scope_id = (uint32_t)if_index;

493

to.in6.sin6_scope_id = (uint32_t)if_index;

453

494

454

495

if(debug){

455

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

496

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

497

port);

456

498

char addrstr[INET6_ADDRSTRLEN] = "";

457

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

499

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

458

500

sizeof(addrstr)) == NULL){

459

501

perror("inet_ntop");

460

502

} else {

464

506

}

465

507

}

466

508

467

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

509

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

468

510

if (ret < 0){

469

511

perror("connect");

470

512

return -1;

499

541

}

500

542

501

543

gnutls_transport_set_ptr (session, (gnutls_transport_ptr_t) tcp_sd);

502

503

ret = gnutls_handshake (session);

544

545

do{

546

ret = gnutls_handshake (session);

547

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

504

548

505

549

if (ret != GNUTLS_E_SUCCESS){

506

550

if(debug){

519

563

}

520

564

521

565

while(true){

522

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

566

buffer_capacity = adjustbuffer(&buffer, buffer_length,

567

buffer_capacity);

523

568

if (buffer_capacity == 0){

524

569

perror("adjustbuffer");

525

570

retval = -1;

537

582

case GNUTLS_E_AGAIN:

538

583

break;

539

584

case GNUTLS_E_REHANDSHAKE:

540

ret = gnutls_handshake (session);

585

do{

586

ret = gnutls_handshake (session);

587

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

541

588

if (ret < 0){

542

589

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

543

590

gnutls_perror (ret);

588

635

} else {

589

636

retval = -1;

590

637

}

638

} else {

639

retval = -1;

591

640

}

592

641

593

642

/* Shutdown procedure */

596

645

free(buffer);

597

646

close(tcp_sd);

598

647

gnutls_deinit (session);

599

gnutls_certificate_free_credentials (mc->cred);

600

gnutls_global_deinit ();

601

648

return retval;

602

649

}

603

650

616

663

flags,

617

664

void* userdata) {

618

665

mandos_context *mc = userdata;

619

assert(r); /* Spurious warning */

666

assert(r);

620

667

621

668

/* Called whenever a service has been resolved successfully or

622

669

timed out */

634

681

char ip[AVAHI_ADDRESS_STR_MAX];

635

682

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

636

683

if(debug){

637

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

638

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

684

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

685

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

686

interface, port);

639

687

}

640

688

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

641

689

if (ret == 0){

642

exit(EXIT_SUCCESS);

690

avahi_simple_poll_quit(mc->simple_poll);

643

691

}

644

692

}

645

693

}

657

705

flags,

658

706

void* userdata) {

659

707

mandos_context *mc = userdata;

660

assert(b); /* Spurious warning */

708

assert(b);

661

709

662

710

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

663

711

is removed from the LAN */

699

747

700

748

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

701

749

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

702

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

703

size_t f_len = strlen(first);

704

size_t s_len = strlen(second);

705

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

706

if (tmp == NULL){

750

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

751

char *tmp;

752

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

753

if(ret < 0){

707

754

return NULL;

708

755

}

709

if(f_len > 0){

710

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

711

}

712

tmp[f_len] = '/';

713

if(s_len > 0){

714

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

715

}

716

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

717

756

return tmp;

718

757

}

719

758

730

769

gid_t gid;

731

770

char *connect_to = NULL;

732

771

AvahiIfIndex if_index = AVAHI_IF_UNSPEC;

733

const char *pubkeyfile = "pubkey.txt";

734

const char *seckeyfile = "seckey.txt";

772

char *pubkeyfilename = NULL;

773

char *seckeyfilename = NULL;

774

const char *pubkeyname = "pubkey.txt";

775

const char *seckeyname = "seckey.txt";

735

776

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

736

777

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

778

bool gnutls_initalized = false;

737

779

738

780

{

739

781

struct argp_option options[] = {

741

783

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

742

784

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

743

785

.arg = "IP",

744

.doc = "Connect directly to a sepcified mandos server", .group = 1 },

786

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

787

.group = 1 },

745

788

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

746

789

.arg = "INTERFACE",

747

.doc = "Interface that Avahi will conntect through", .group = 1 },

790

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

791

.group = 1 },

748

792

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

749

793

.arg = "KEYDIR",

750

.doc = "Directory where the openpgp keyring is", .group = 1 },

794

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

795

.group = 1 },

751

796

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

752

797

.arg = "SECKEY",

753

.doc = "Secret openpgp key for gnutls authentication", .group = 1 },

798

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

799

.group = 1 },

754

800

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

755

801

.arg = "PUBKEY",

756

.doc = "Public openpgp key for gnutls authentication", .group = 2 },

802

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

803

.group = 2 },

757

804

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

758

805

.arg = "BITS",

759

.doc = "dh-bits to use in gnutls communication", .group = 2 },

806

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

807

.group = 2 },

760

808

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

761

809

.arg = "PRIORITY",

762

810

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

764

812

};

765

813

766

814

767

error_t parse_opt (int key, char *arg, struct argp_state *state) {

768

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

769

pointer to our plugin list pointer. */

815

error_t parse_opt (int key, char *arg,

816

struct argp_state *state) {

817

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

818

a pointer to our plugin list pointer. */

770

819

switch (key) {

771

820

case 128:

772

821

debug = true;

781

830

keydir = arg;

782

831

break;

783

832

case 's':

784

seckeyfile = arg;

833

seckeyname = arg;

785

834

break;

786

835

case 'p':

787

pubkeyfile = arg;

836

pubkeyname = arg;

788

837

break;

789

838

case 129:

790

839

errno = 0;

799

848

break;

800

849

case ARGP_KEY_ARG:

801

850

argp_usage (state);

851

case ARGP_KEY_END:

802

852

break;

803

case ARGP_KEY_END:

804

break;

805

853

default:

806

854

return ARGP_ERR_UNKNOWN;

807

855

}

810

858

811

859

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

812

860

.args_doc = "",

813

.doc = "Mandos client -- Get and decrypt passwords from mandos server" };

814

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

861

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

862

" passwords from mandos server" };

863

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

864

if (ret == ARGP_ERR_UNKNOWN){

865

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

866

exitcode = EXIT_FAILURE;

867

goto end;

868

}

815

869

}

816

870

817

pubkeyfile = combinepath(keydir, pubkeyfile);

818

if (pubkeyfile == NULL){

871

pubkeyfilename = combinepath(keydir, pubkeyname);

872

if (pubkeyfilename == NULL){

819

873

perror("combinepath");

820

874

exitcode = EXIT_FAILURE;

821

875

goto end;

822

876

}

823

877

824

seckeyfile = combinepath(keydir, seckeyfile);

825

if (seckeyfile == NULL){

878

seckeyfilename = combinepath(keydir, seckeyname);

879

if (seckeyfilename == NULL){

826

880

perror("combinepath");

881

exitcode = EXIT_FAILURE;

827

882

goto end;

828

883

}

829

884

830

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

885

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

831

886

if (ret == -1){

832

fprintf(stderr, "init_gnutls_global\n");

887

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

888

exitcode = EXIT_FAILURE;

833

889

goto end;

834

}

835

890

} else {

891

gnutls_initalized = true;

892

}

893

894

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

895

{

896

sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);

897

if(sd < 0) {

898

perror("socket");

899

exitcode = EXIT_FAILURE;

900

goto end;

901

}

902

strcpy(network.ifr_name, interface);

903

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

904

if(ret == -1){

905

perror("ioctl SIOCGIFFLAGS");

906

exitcode = EXIT_FAILURE;

907

goto end;

908

}

909

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

910

network.ifr_flags |= IFF_UP;

911

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

912

if(ret == -1){

913

perror("ioctl SIOCSIFFLAGS");

914

exitcode = EXIT_FAILURE;

915

goto end;

916

}

917

}

918

close(sd);

919

}

920

836

921

uid = getuid();

837

922

gid = getgid();

838

923

839

924

ret = setuid(uid);

840

925

if (ret == -1){

841

926

perror("setuid");

879

964

goto end;

880

965

}

881

966

882

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

883

{

884

sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);

885

if(sd < 0) {

886

perror("socket");

887

exitcode = EXIT_FAILURE;

888

goto end;

889

}

890

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

891

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

892

if(ret == -1){

893

perror("ioctl SIOCGIFFLAGS");

894

exitcode = EXIT_FAILURE;

895

goto end;

896

}

897

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

898

network.ifr_flags |= IFF_UP;

899

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

900

if(ret == -1){

901

perror("ioctl SIOCSIFFLAGS");

902

exitcode = EXIT_FAILURE;

903

goto end;

904

}

905

}

906

close(sd);

907

}

908

909

967

if (not debug){

910

968

avahi_set_log_function(empty_log);

911

969

}

983

1041

984

1042

if (mc.simple_poll != NULL)

985

1043

avahi_simple_poll_free(mc.simple_poll);

986

free(pubkeyfile);

987

free(seckeyfile);

1044

free(pubkeyfilename);

1045

free(seckeyfilename);

1046

1047

if (gnutls_initalized){

1048

gnutls_certificate_free_credentials(mc.cred);

1049

gnutls_global_deinit ();

1050

}

988

1051

989

1052

return exitcode;

990

1053

}