/mandos/release : revision 24.1.138

30

*/

31

32

/* Needed by GPGME, specifically gpgme_data_seek() */

33

#ifndef _LARGEFILE_SOURCE

33

34

#define _LARGEFILE_SOURCE

35

#endif

36

#ifndef _FILE_OFFSET_BITS

34

37

#define _FILE_OFFSET_BITS 64

38

#endif

35

39

36

40

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

37

41

38

42

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

39

stdout, ferror(), sscanf(),

40

remove() */

43

stdout, ferror(), remove() */

41

44

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

42

45

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

43

46

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

44

srand() */

47

srand(), strtof() */

45

48

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

46

49

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

47

50

strerror(), asprintf(), strcpy() */

56

59

#include <fcntl.h> /* open() */

57

60

#include <dirent.h> /* opendir(), struct dirent, readdir()

58

61

*/

59

#include <inttypes.h> /* PRIu16, intmax_t, SCNdMAX */

62

#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,

63

strtoimax() */

60

64

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

61

65

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

62

66

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

75

79

argp_state, struct argp,

76

80

argp_parse(), ARGP_KEY_ARG,

77

81

ARGP_KEY_END, ARGP_ERR_UNKNOWN */

82

#include <signal.h> /* sigemptyset(), sigaddset(),

83

sigaction(), SIGTERM, sigaction,

84

sig_atomic_t */

85

78

86

#ifdef __linux__

79

87

#include <sys/klog.h> /* klogctl() */

80

#endif

88

#endif /* __linux__ */

81

89

82

90

/* Avahi */

83

91

/* All Avahi types, constants and functions

129

137

gpgme_ctx_t ctx;

130

138

} mandos_context;

131

139

140

/* global context so signal handler can reach it*/

141

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

142

.dh_bits = 1024, .priority = "SECURE256"

143

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

144

132

145

/*

133

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

134

* "buffer_capacity" is how much is currently allocated,

146

* Make additional room in "buffer" for at least BUFFER_SIZE more

147

* bytes. "buffer_capacity" is how much is currently allocated,

135

148

* "buffer_length" is how much is already used.

136

149

*/

137

size_t adjustbuffer(char **buffer, size_t buffer_length,

150

size_t incbuffer(char **buffer, size_t buffer_length,

138

151

size_t buffer_capacity){

139

152

if(buffer_length + BUFFER_SIZE > buffer_capacity){

140

153

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

149

162

/*

150

163

* Initialize GPGME.

151

164

*/

152

static bool init_gpgme(mandos_context *mc, const char *seckey,

165

static bool init_gpgme(const char *seckey,

153

166

const char *pubkey, const char *tempdir){

154

167

int ret;

155

168

gpgme_error_t rc;

176

189

return false;

177

190

}

178

191

179

rc = gpgme_op_import(mc->ctx, pgp_data);

192

rc = gpgme_op_import(mc.ctx, pgp_data);

180

193

if(rc != GPG_ERR_NO_ERROR){

181

194

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

182

195

gpgme_strsource(rc), gpgme_strerror(rc));

192

205

}

193

206

194

207

if(debug){

195

fprintf(stderr, "Initialize gpgme\n");

208

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

196

209

}

197

210

198

211

/* Init GPGME */

225

238

}

226

239

227

240

/* Create new GPGME "context" */

228

rc = gpgme_new(&(mc->ctx));

241

rc = gpgme_new(&(mc.ctx));

229

242

if(rc != GPG_ERR_NO_ERROR){

230

243

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

231

244

gpgme_strsource(rc), gpgme_strerror(rc));

243

256

* Decrypt OpenPGP data.

244

257

* Returns -1 on error

245

258

*/

246

static ssize_t pgp_packet_decrypt(const mandos_context *mc,

247

const char *cryptotext,

259

static ssize_t pgp_packet_decrypt(const char *cryptotext,

248

260

size_t crypto_size,

249

261

char **plaintext){

250

262

gpgme_data_t dh_crypto, dh_plain;

277

289

278

290

/* Decrypt data from the cryptotext data buffer to the plaintext

279

291

data buffer */

280

rc = gpgme_op_decrypt(mc->ctx, dh_crypto, dh_plain);

292

rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);

281

293

if(rc != GPG_ERR_NO_ERROR){

282

294

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

283

295

gpgme_strsource(rc), gpgme_strerror(rc));

284

296

plaintext_length = -1;

285

297

if(debug){

286

298

gpgme_decrypt_result_t result;

287

result = gpgme_op_decrypt_result(mc->ctx);

299

result = gpgme_op_decrypt_result(mc.ctx);

288

300

if(result == NULL){

289

301

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

290

302

} else {

297

309

}

298

310

gpgme_recipient_t recipient;

299

311

recipient = result->recipients;

300

if(recipient){

301

while(recipient != NULL){

302

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

303

gpgme_pubkey_algo_name(recipient->pubkey_algo));

304

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

305

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

306

recipient->status == GPG_ERR_NO_SECKEY

307

? "No" : "Yes");

308

recipient = recipient->next;

309

}

312

while(recipient != NULL){

313

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

314

gpgme_pubkey_algo_name(recipient->pubkey_algo));

315

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

316

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

317

recipient->status == GPG_ERR_NO_SECKEY

318

? "No" : "Yes");

319

recipient = recipient->next;

310

320

}

311

321

}

312

322

}

326

336

327

337

*plaintext = NULL;

328

338

while(true){

329

plaintext_capacity = adjustbuffer(plaintext,

339

plaintext_capacity = incbuffer(plaintext,

330

340

(size_t)plaintext_length,

331

341

plaintext_capacity);

332

342

if(plaintext_capacity == 0){

333

perror("adjustbuffer");

343

perror("incbuffer");

334

344

plaintext_length = -1;

335

345

goto decrypt_end;

336

346

}

382

392

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

383

393

}

384

394

385

static int init_gnutls_global(mandos_context *mc,

386

const char *pubkeyfilename,

395

static int init_gnutls_global(const char *pubkeyfilename,

387

396

const char *seckeyfilename){

388

397

int ret;

389

398

407

416

}

408

417

409

418

/* OpenPGP credentials */

410

gnutls_certificate_allocate_credentials(&mc->cred);

419

gnutls_certificate_allocate_credentials(&mc.cred);

411

420

if(ret != GNUTLS_E_SUCCESS){

412

421

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

413

422

from

425

434

}

426

435

427

436

ret = gnutls_certificate_set_openpgp_key_file

428

(mc->cred, pubkeyfilename, seckeyfilename,

437

(mc.cred, pubkeyfilename, seckeyfilename,

429

438

GNUTLS_OPENPGP_FMT_BASE64);

430

439

if(ret != GNUTLS_E_SUCCESS){

431

440

fprintf(stderr,

437

446

}

438

447

439

448

/* GnuTLS server initialization */

440

ret = gnutls_dh_params_init(&mc->dh_params);

449

ret = gnutls_dh_params_init(&mc.dh_params);

441

450

if(ret != GNUTLS_E_SUCCESS){

442

451

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

443

452

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

444

453

goto globalfail;

445

454

}

446

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

455

ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);

447

456

if(ret != GNUTLS_E_SUCCESS){

448

457

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

449

458

safer_gnutls_strerror(ret));

450

459

goto globalfail;

451

460

}

452

461

453

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

462

gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);

454

463

455

464

return 0;

456

465

457

466

globalfail:

458

467

459

gnutls_certificate_free_credentials(mc->cred);

468

gnutls_certificate_free_credentials(mc.cred);

460

469

gnutls_global_deinit();

461

gnutls_dh_params_deinit(mc->dh_params);

470

gnutls_dh_params_deinit(mc.dh_params);

462

471

return -1;

463

472

}

464

473

465

static int init_gnutls_session(mandos_context *mc,

466

gnutls_session_t *session){

474

static int init_gnutls_session(gnutls_session_t *session){

467

475

int ret;

468

476

/* GnuTLS session creation */

469

477

ret = gnutls_init(session, GNUTLS_SERVER);

474

482

475

483

{

476

484

const char *err;

477

ret = gnutls_priority_set_direct(*session, mc->priority, &err);

485

ret = gnutls_priority_set_direct(*session, mc.priority, &err);

478

486

if(ret != GNUTLS_E_SUCCESS){

479

487

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

480

488

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

485

493

}

486

494

487

495

ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,

488

mc->cred);

496

mc.cred);

489

497

if(ret != GNUTLS_E_SUCCESS){

490

498

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

491

499

safer_gnutls_strerror(ret));

497

505

gnutls_certificate_server_set_request(*session,

498

506

GNUTLS_CERT_IGNORE);

499

507

500

gnutls_dh_set_prime_bits(*session, mc->dh_bits);

508

gnutls_dh_set_prime_bits(*session, mc.dh_bits);

501

509

502

510

return 0;

503

511

}

509

517

/* Called when a Mandos server is found */

510

518

static int start_mandos_communication(const char *ip, uint16_t port,

511

519

AvahiIfIndex if_index,

512

mandos_context *mc, int af){

520

int af){

513

521

int ret, tcp_sd;

514

522

ssize_t sret;

515

523

union {

538

546

return -1;

539

547

}

540

548

541

ret = init_gnutls_session(mc, &session);

549

ret = init_gnutls_session(&session);

542

550

if(ret != 0){

543

551

return -1;

544

552

}

556

564

557

565

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

558

566

if(af == AF_INET6){

559

to.in6.sin6_family = (uint16_t)af;

567

to.in6.sin6_family = (sa_family_t)af;

560

568

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

561

569

} else { /* IPv4 */

562

570

to.in.sin_family = (sa_family_t)af;

685

693

}

686

694

687

695

while(true){

688

buffer_capacity = adjustbuffer(&buffer, buffer_length,

696

buffer_capacity = incbuffer(&buffer, buffer_length,

689

697

buffer_capacity);

690

698

if(buffer_capacity == 0){

691

perror("adjustbuffer");

699

perror("incbuffer");

692

700

retval = -1;

693

701

goto mandos_end;

694

702

}

733

741

gnutls_bye(session, GNUTLS_SHUT_RDWR);

734

742

735

743

if(buffer_length > 0){

736

decrypted_buffer_size = pgp_packet_decrypt(mc, buffer,

744

decrypted_buffer_size = pgp_packet_decrypt(buffer,

737

745

buffer_length,

738

746

&decrypted_buffer);

739

747

if(decrypted_buffer_size >= 0){

785

793

AVAHI_GCC_UNUSED AvahiStringList *txt,

786

794

AVAHI_GCC_UNUSED AvahiLookupResultFlags

787

795

flags,

788

void* userdata){

789

mandos_context *mc = userdata;

796

AVAHI_GCC_UNUSED void* userdata){

790

797

assert(r);

791

798

792

799

/* Called whenever a service has been resolved successfully or

797

804

case AVAHI_RESOLVER_FAILURE:

798

805

fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"

799

806

" of type '%s' in domain '%s': %s\n", name, type, domain,

800

avahi_strerror(avahi_server_errno(mc->server)));

807

avahi_strerror(avahi_server_errno(mc.server)));

801

808

break;

802

809

803

810

case AVAHI_RESOLVER_FOUND:

809

816

PRIdMAX ") on port %" PRIu16 "\n", name, host_name,

810

817

ip, (intmax_t)interface, port);

811

818

}

812

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

819

int ret = start_mandos_communication(ip, port, interface,

813

820

avahi_proto_to_af(proto));

814

821

if(ret == 0){

815

avahi_simple_poll_quit(mc->simple_poll);

822

avahi_simple_poll_quit(mc.simple_poll);

816

823

}

817

824

}

818

825

}

828

835

const char *domain,

829

836

AVAHI_GCC_UNUSED AvahiLookupResultFlags

830

837

flags,

831

void* userdata){

832

mandos_context *mc = userdata;

838

AVAHI_GCC_UNUSED void* userdata){

833

839

assert(b);

834

840

835

841

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

840

846

case AVAHI_BROWSER_FAILURE:

841

847

842

848

fprintf(stderr, "(Avahi browser) %s\n",

843

avahi_strerror(avahi_server_errno(mc->server)));

844

avahi_simple_poll_quit(mc->simple_poll);

849

avahi_strerror(avahi_server_errno(mc.server)));

850

avahi_simple_poll_quit(mc.simple_poll);

845

851

return;

846

852

847

853

case AVAHI_BROWSER_NEW:

850

856

the callback function is called the Avahi server will free the

851

857

resolver for us. */

852

858

853

if(!(avahi_s_service_resolver_new(mc->server, interface,

854

protocol, name, type, domain,

855

AVAHI_PROTO_INET6, 0,

856

resolve_callback, mc)))

859

if(avahi_s_service_resolver_new(mc.server, interface, protocol,

860

name, type, domain, protocol, 0,

861

resolve_callback, NULL) == NULL)

857

862

fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",

858

name, avahi_strerror(avahi_server_errno(mc->server)));

863

name, avahi_strerror(avahi_server_errno(mc.server)));

859

864

break;

860

865

861

866

case AVAHI_BROWSER_REMOVE:

870

875

}

871

876

}

872

877

878

sig_atomic_t quit_now = 0;

879

880

/* stop main loop after sigterm has been called */

881

static void handle_sigterm(__attribute__((unused)) int sig){

882

if(quit_now){

883

return;

884

}

885

quit_now = 1;

886

int old_errno = errno;

887

if(mc.simple_poll != NULL){

888

avahi_simple_poll_quit(mc.simple_poll);

889

}

890

errno = old_errno;

891

}

892

873

893

int main(int argc, char *argv[]){

874

894

AvahiSServiceBrowser *sb = NULL;

875

895

int error;

876

896

int ret;

877

897

intmax_t tmpmax;

878

int numchars;

898

char *tmp;

879

899

int exitcode = EXIT_SUCCESS;

880

900

const char *interface = "eth0";

881

901

struct ifreq network;

882

int sd;

902

int sd = -1;

903

bool interface_taken_up = false;

883

904

uid_t uid;

884

905

gid_t gid;

885

906

char *connect_to = NULL;

889

910

const char *seckey = PATHDIR "/" SECKEY;

890

911

const char *pubkey = PATHDIR "/" PUBKEY;

891

912

892

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

893

.dh_bits = 1024, .priority = "SECURE256"

894

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

895

913

bool gnutls_initialized = false;

896

914

bool gpgme_initialized = false;

897

double delay = 2.5;

915

float delay = 2.5f;

916

917

struct sigaction old_sigterm_action;

918

struct sigaction sigterm_action = { .sa_handler = handle_sigterm };

898

919

899

920

{

900

921

struct argp_option options[] = {

952

973

pubkey = arg;

953

974

break;

954

975

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

955

ret = sscanf(arg, "%" SCNdMAX "%n", &tmpmax, &numchars);

956

if(ret < 1 or tmpmax != (typeof(mc.dh_bits))tmpmax

957

or arg[numchars] != '\0'){

976

errno = 0;

977

tmpmax = strtoimax(arg, &tmp, 10);

978

if(errno != 0 or tmp == arg or *tmp != '\0'

979

or tmpmax != (typeof(mc.dh_bits))tmpmax){

958

980

fprintf(stderr, "Bad number of DH bits\n");

959

981

exit(EXIT_FAILURE);

960

982

}

964

986

mc.priority = arg;

965

987

break;

966

988

case 131: /* --delay */

967

ret = sscanf(arg, "%lf%n", &delay, &numchars);

968

if(ret < 1 or arg[numchars] != '\0'){

989

errno = 0;

990

delay = strtof(arg, &tmp);

991

if(errno != 0 or tmp == arg or *tmp != '\0'){

969

992

fprintf(stderr, "Bad delay\n");

970

993

exit(EXIT_FAILURE);

971

994

}

992

1015

}

993

1016

}

994

1017

1018

if(not debug){

1019

avahi_set_log_function(empty_log);

1020

}

1021

1022

/* Initialize Avahi early so avahi_simple_poll_quit() can be called

1023

from the signal handler */

1024

/* Initialize the pseudo-RNG for Avahi */

1025

srand((unsigned int) time(NULL));

1026

mc.simple_poll = avahi_simple_poll_new();

1027

if(mc.simple_poll == NULL){

1028

fprintf(stderr, "Avahi: Failed to create simple poll object.\n");

1029

exitcode = EXIT_FAILURE;

1030

goto end;

1031

}

1032

1033

sigemptyset(&sigterm_action.sa_mask);

1034

ret = sigaddset(&sigterm_action.sa_mask, SIGINT);

1035

if(ret == -1){

1036

perror("sigaddset");

1037

exitcode = EXIT_FAILURE;

1038

goto end;

1039

}

1040

ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);

1041

if(ret == -1){

1042

perror("sigaddset");

1043

exitcode = EXIT_FAILURE;

1044

goto end;

1045

}

1046

ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);

1047

if(ret == -1){

1048

perror("sigaddset");

1049

exitcode = EXIT_FAILURE;

1050

goto end;

1051

}

1052

ret = sigaction(SIGTERM, &sigterm_action, &old_sigterm_action);

1053

if(ret == -1){

1054

perror("sigaction");

1055

exitcode = EXIT_FAILURE;

1056

goto end;

1057

}

1058

995

1059

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

996

1060

if(interface[0] != '\0'){

997

1061

#ifdef __linux__

1003

1067

restore_loglevel = false;

1004

1068

perror("klogctl");

1005

1069

}

1006

#endif

1070

#endif /* __linux__ */

1007

1071

1008

1072

sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);

1009

1073

if(sd < 0){

1016

1080

perror("klogctl");

1017

1081

}

1018

1082

}

1019

#endif

1083

#endif /* __linux__ */

1020

1084

goto end;

1021

1085

}

1022

1086

strcpy(network.ifr_name, interface);

1030

1094

perror("klogctl");

1031

1095

}

1032

1096

}

1033

#endif

1097

#endif /* __linux__ */

1034

1098

exitcode = EXIT_FAILURE;

1035

1099

goto end;

1036

1100

}

1047

1111

perror("klogctl");

1048

1112

}

1049

1113

}

1050

#endif

1114

#endif /* __linux__ */

1051

1115

goto end;

1052

1116

}

1117

interface_taken_up = true;

1053

1118

}

1054

1119

/* sleep checking until interface is running */

1055

1120

for(int i=0; i < delay * 4; i++){

1065

1130

perror("nanosleep");

1066

1131

}

1067

1132

}

1068

ret = (int)TEMP_FAILURE_RETRY(close(sd));

1069

if(ret == -1){

1070

perror("close");

1133

if(not interface_taken_up){

1134

ret = (int)TEMP_FAILURE_RETRY(close(sd));

1135

if(ret == -1){

1136

perror("close");

1137

}

1071

1138

}

1072

1139

#ifdef __linux__

1073

1140

if(restore_loglevel){

1077

1144

perror("klogctl");

1078

1145

}

1079

1146

}

1080

#endif

1147

#endif /* __linux__ */

1081

1148

}

1082

1149

1083

1150

uid = getuid();

1094

1161

perror("setuid");

1095

1162

}

1096

1163

1097

ret = init_gnutls_global(&mc, pubkey, seckey);

1164

ret = init_gnutls_global(pubkey, seckey);

1098

1165

if(ret == -1){

1099

1166

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

1100

1167

exitcode = EXIT_FAILURE;

1109

1176

}

1110

1177

tempdir_created = true;

1111

1178

1112

if(not init_gpgme(&mc, pubkey, seckey, tempdir)){

1179

if(not init_gpgme(pubkey, seckey, tempdir)){

1113

1180

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

1114

1181

exitcode = EXIT_FAILURE;

1115

1182

goto end;

1136

1203

goto end;

1137

1204

}

1138

1205

uint16_t port;

1139

ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);

1140

if(ret < 1 or tmpmax != (uint16_t)tmpmax

1141

or address[numchars+1] != '\0'){

1206

errno = 0;

1207

tmpmax = strtoimax(address+1, &tmp, 10);

1208

if(errno != 0 or tmp == address+1 or *tmp != '\0'

1209

or tmpmax != (uint16_t)tmpmax){

1142

1210

fprintf(stderr, "Bad port number\n");

1143

1211

exitcode = EXIT_FAILURE;

1144

1212

goto end;

1153

1221

} else {

1154

1222

af = AF_INET;

1155

1223

}

1156

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

1157

af);

1224

ret = start_mandos_communication(address, port, if_index, af);

1158

1225

if(ret < 0){

1159

1226

exitcode = EXIT_FAILURE;

1160

1227

} else {

1162

1229

}

1163

1230

goto end;

1164

1231

}

1165

1166

if(not debug){

1167

avahi_set_log_function(empty_log);

1168

}

1169

1170

/* Initialize the pseudo-RNG for Avahi */

1171

srand((unsigned int) time(NULL));

1172

1173

/* Allocate main Avahi loop object */

1174

mc.simple_poll = avahi_simple_poll_new();

1175

if(mc.simple_poll == NULL){

1176

fprintf(stderr, "Avahi: Failed to create simple poll object.\n");

1177

exitcode = EXIT_FAILURE;

1178

goto end;

1179

}

1180

1232

1181

1233

{

1182

1234

AvahiServerConfig config;

1183

1235

/* Do not publish any local Zeroconf records */

1206

1258

1207

1259

/* Create the Avahi service browser */

1208

1260

sb = avahi_s_service_browser_new(mc.server, if_index,

1209

AVAHI_PROTO_INET6, "_mandos._tcp",

1210

NULL, 0, browse_callback, &mc);

1261

AVAHI_PROTO_UNSPEC, "_mandos._tcp",

1262

NULL, 0, browse_callback, NULL);

1211

1263

if(sb == NULL){

1212

1264

fprintf(stderr, "Failed to create service browser: %s\n",

1213

1265

avahi_strerror(avahi_server_errno(mc.server)));

1249

1301

gpgme_release(mc.ctx);

1250

1302

}

1251

1303

1304

/* Take down the network interface */

1305

if(interface_taken_up){

1306

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

1307

if(ret == -1){

1308

perror("ioctl SIOCGIFFLAGS");

1309

} else if(network.ifr_flags & IFF_UP) {

1310

network.ifr_flags &= ~IFF_UP; /* clear flag */

1311

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

1312

if(ret == -1){

1313

perror("ioctl SIOCSIFFLAGS");

1314

}

1315

}

1316

ret = (int)TEMP_FAILURE_RETRY(close(sd));

1317

if(ret == -1){

1318

perror("close");

1319

}

1320

}

1321

1252

1322

/* Removes the temp directory used by GPGME */

1253

1323

if(tempdir_created){

1254

1324

DIR *d;