/mandos/release : revision 237.2.152

43

stdout, ferror(), remove() */

44

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

45

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

46

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

47

strtof(), abort() */

46

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

47

srand(), strtof(), abort() */

48

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

49

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

50

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

82

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

83

sigaction(), SIGTERM, sig_atomic_t,

84

raise() */

85

#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,

86

EX_NOHOST, EX_IOERR, EX_PROTOCOL */

87

85

88

86

#ifdef __linux__

89

87

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

127

125

static const char mandos_protocol_version[] = "1";

128

126

const char *argp_program_version = "mandos-client " VERSION;

129

127

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

130

static const char sys_class_net[] = "/sys/class/net";

131

char *connect_to = NULL;

132

128

133

129

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

134

130

typedef struct {

556

552

gnutls_session_t session;

557

553

int pf; /* Protocol family */

558

554

559

errno = 0;

560

561

555

if(quit_now){

562

errno = EINTR;

563

556

return -1;

564

557

}

565

558

572

565

break;

573

566

default:

574

567

fprintf(stderr, "Bad address family: %d\n", af);

575

errno = EINVAL;

576

568

return -1;

577

569

}

578

570

588

580

589

581

tcp_sd = socket(pf, SOCK_STREAM, 0);

590

582

if(tcp_sd < 0){

591

int e = errno;

592

583

perror("socket");

593

errno = e;

594

584

goto mandos_end;

595

585

}

596

586

597

587

if(quit_now){

598

errno = EINTR;

599

588

goto mandos_end;

600

589

}

601

590

608

597

ret = inet_pton(af, ip, &to.in.sin_addr);

609

598

}

610

599

if(ret < 0 ){

611

int e = errno;

612

600

perror("inet_pton");

613

errno = e;

614

601

goto mandos_end;

615

602

}

616

603

if(ret == 0){

617

int e = errno;

618

604

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

619

errno = e;

620

605

goto mandos_end;

621

606

}

622

607

if(af == AF_INET6){

630

615

if(if_index == AVAHI_IF_UNSPEC){

631

616

fprintf(stderr, "An IPv6 link-local address is incomplete"

632

617

" without a network interface\n");

633

errno = EINVAL;

634

618

goto mandos_end;

635

619

}

636

620

/* Set the network interface number as scope */

643

627

}

644

628

645

629

if(quit_now){

646

errno = EINTR;

647

630

goto mandos_end;

648

631

}

649

632

680

663

}

681

664

682

665

if(quit_now){

683

errno = EINTR;

684

666

goto mandos_end;

685

667

}

686

668

690

672

ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */

691

673

}

692

674

if(ret < 0){

693

int e = errno;

694

675

perror("connect");

695

errno = e;

696

676

goto mandos_end;

697

677

}

698

678

699

679

if(quit_now){

700

errno = EINTR;

701

680

goto mandos_end;

702

681

}

703

682

708

687

ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,

709

688

out_size - written));

710

689

if(ret == -1){

711

int e = errno;

712

690

perror("write");

713

errno = e;

714

691

goto mandos_end;

715

692

}

716

693

written += (size_t)ret;

726

703

}

727

704

728

705

if(quit_now){

729

errno = EINTR;

730

706

goto mandos_end;

731

707

}

732

708

}

736

712

}

737

713

738

714

if(quit_now){

739

errno = EINTR;

740

715

goto mandos_end;

741

716

}

742

717

743

718

gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);

744

719

745

720

if(quit_now){

746

errno = EINTR;

747

721

goto mandos_end;

748

722

}

749

723

750

724

do {

751

725

ret = gnutls_handshake(session);

752

726

if(quit_now){

753

errno = EINTR;

754

727

goto mandos_end;

755

728

}

756

729

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

760

733

fprintf(stderr, "*** GnuTLS Handshake failed ***\n");

761

734

gnutls_perror(ret);

762

735

}

763

errno = EPROTO;

764

736

goto mandos_end;

765

737

}

766

738

774

746

while(true){

775

747

776

748

if(quit_now){

777

errno = EINTR;

778

749

goto mandos_end;

779

750

}

780

751

781

752

buffer_capacity = incbuffer(&buffer, buffer_length,

782

753

buffer_capacity);

783

754

if(buffer_capacity == 0){

784

int e = errno;

785

755

perror("incbuffer");

786

errno = e;

787

756

goto mandos_end;

788

757

}

789

758

790

759

if(quit_now){

791

errno = EINTR;

792

760

goto mandos_end;

793

761

}

794

762

807

775

ret = gnutls_handshake(session);

808

776

809

777

if(quit_now){

810

errno = EINTR;

811

778

goto mandos_end;

812

779

}

813

780

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

814

781

if(ret < 0){

815

782

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

816

783

gnutls_perror(ret);

817

errno = EPROTO;

818

784

goto mandos_end;

819

785

}

820

786

break;

822

788

fprintf(stderr, "Unknown error while reading data from"

823

789

" encrypted session with Mandos server\n");

824

790

gnutls_bye(session, GNUTLS_SHUT_RDWR);

825

errno = EIO;

826

791

goto mandos_end;

827

792

}

828

793

} else {

835

800

}

836

801

837

802

if(quit_now){

838

errno = EINTR;

839

803

goto mandos_end;

840

804

}

841

805

842

806

do {

843

807

ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);

844

808

if(quit_now){

845

errno = EINTR;

846

809

goto mandos_end;

847

810

}

848

811

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

857

820

written = 0;

858

821

while(written < (size_t) decrypted_buffer_size){

859

822

if(quit_now){

860

errno = EINTR;

861

823

goto mandos_end;

862

824

}

863

825

865

827

(size_t)decrypted_buffer_size - written,

866

828

stdout);

867

829

if(ret == 0 and ferror(stdout)){

868

int e = errno;

869

830

if(debug){

870

831

fprintf(stderr, "Error writing encrypted data: %s\n",

871

832

strerror(errno));

872

833

}

873

errno = e;

874

834

goto mandos_end;

875

835

}

876

836

written += (size_t)ret;

882

842

/* Shutdown procedure */

883

843

884

844

mandos_end:

885

{

886

int e = errno;

887

free(decrypted_buffer);

888

free(buffer);

889

if(tcp_sd >= 0){

890

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

891

}

892

if(ret == -1){

893

if(e == 0){

894

e = errno;

895

}

896

perror("close");

897

}

898

gnutls_deinit(session);

899

if(quit_now){

900

e = EINTR;

901

retval = -1;

902

}

903

errno = e;

845

free(decrypted_buffer);

846

free(buffer);

847

if(tcp_sd >= 0){

848

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

849

}

850

if(ret == -1){

851

perror("close");

852

}

853

gnutls_deinit(session);

854

if(quit_now){

855

retval = -1;

904

856

}

905

857

return retval;

906

858

}

1022

974

errno = old_errno;

1023

975

}

1024

976

1025

/*

1026

* This function determines if a directory entry in /sys/class/net

1027

* corresponds to an acceptable network device.

1028

* (This function is passed to scandir(3) as a filter function.)

1029

*/

1030

int good_interface(const struct dirent *if_entry){

1031

ssize_t ssret;

1032

char *flagname = NULL;

1033

int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,

1034

if_entry->d_name);

1035

if(ret < 0){

1036

perror("asprintf");

1037

return 0;

1038

}

1039

if(if_entry->d_name[0] == '.'){

1040

return 0;

1041

}

1042

int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));

1043

if(flags_fd == -1){

1044

perror("open");

1045

return 0;

1046

}

1047

typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */

1048

/* read line from flags_fd */

1049

ssize_t to_read = (sizeof(ifreq_flags)*2)+3; /* "0x1003\n" */

1050

char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */

1051

flagstring[(size_t)to_read] = '\0';

1052

if(flagstring == NULL){

1053

perror("malloc");

1054

close(flags_fd);

1055

return 0;

1056

}

1057

while(to_read > 0){

1058

ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,

1059

(size_t)to_read));

1060

if(ssret == -1){

1061

perror("read");

1062

free(flagstring);

1063

close(flags_fd);

1064

return 0;

1065

}

1066

to_read -= ssret;

1067

if(ssret == 0){

1068

break;

1069

}

1070

}

1071

close(flags_fd);

1072

intmax_t tmpmax;

1073

char *tmp;

1074

errno = 0;

1075

tmpmax = strtoimax(flagstring, &tmp, 0);

1076

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

1077

and not (isspace(*tmp)))

1078

or tmpmax != (ifreq_flags)tmpmax){

1079

if(debug){

1080

fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",

1081

flagstring, if_entry->d_name);

1082

}

1083

free(flagstring);

1084

return 0;

1085

}

1086

free(flagstring);

1087

ifreq_flags flags = (ifreq_flags)tmpmax;

1088

/* Reject the loopback device */

1089

if(flags & IFF_LOOPBACK){

1090

if(debug){

1091

fprintf(stderr, "Rejecting loopback interface \"%s\"\n",

1092

if_entry->d_name);

1093

}

1094

return 0;

1095

}

1096

/* Accept point-to-point devices only if connect_to is specified */

1097

if(connect_to != NULL and (flags & IFF_POINTOPOINT)){

1098

if(debug){

1099

fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",

1100

if_entry->d_name);

1101

}

1102

return 1;

1103

}

1104

/* Otherwise, reject non-broadcast-capable devices */

1105

if(not (flags & IFF_BROADCAST)){

1106

if(debug){

1107

fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",

1108

if_entry->d_name);

1109

}

1110

return 0;

1111

}

1112

/* Accept this device */

1113

if(debug){

1114

fprintf(stderr, "Interface \"%s\" is acceptable\n",

1115

if_entry->d_name);

1116

}

1117

return 1;

1118

}

1119

1120

977

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

1121

978

AvahiSServiceBrowser *sb = NULL;

1122

979

int error;

1124

981

intmax_t tmpmax;

1125

982

char *tmp;

1126

983

int exitcode = EXIT_SUCCESS;

1127

const char *interface = "";

984

const char *interface = "eth0";

1128

985

struct ifreq network;

1129

986

int sd = -1;

1130

987

bool take_down_interface = false;

1131

988

uid_t uid;

1132

989

gid_t gid;

990

char *connect_to = NULL;

1133

991

char tempdir[] = "/tmp/mandosXXXXXX";

1134

992

bool tempdir_created = false;

1135

993

AvahiIfIndex if_index = AVAHI_IF_UNSPEC;

1198

1056

.arg = "SECONDS",

1199

1057

.doc = "Maximum delay to wait for interface startup",

1200

1058

.group = 2 },

1201

/*

1202

* These reproduce what we would get without ARGP_NO_HELP

1203

*/

1204

{ .name = "help", .key = '?',

1205

.doc = "Give this help list", .group = -1 },

1206

{ .name = "usage", .key = -3,

1207

.doc = "Give a short usage message", .group = -1 },

1208

{ .name = "version", .key = 'V',

1209

.doc = "Print program version", .group = -1 },

1210

1059

{ .name = NULL }

1211

1060

};

1212

1061

1213

1062

error_t parse_opt(int key, char *arg,

1214

1063

struct argp_state *state){

1215

errno = 0;

1216

1064

switch(key){

1217

1065

case 128: /* --debug */

1218

1066

debug = true;

1234

1082

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

1235

1083

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

1236

1084

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

1237

argp_error(state, "Bad number of DH bits");

1085

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

1086

exit(EXIT_FAILURE);

1238

1087

}

1239

1088

mc.dh_bits = (typeof(mc.dh_bits))tmpmax;

1240

1089

break;

1245

1094

errno = 0;

1246

1095

delay = strtof(arg, &tmp);

1247

1096

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

1248

argp_error(state, "Bad delay");

1097

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

1098

exit(EXIT_FAILURE);

1249

1099

}

1250

1100

break;

1251

/*

1252

* These reproduce what we would get without ARGP_NO_HELP

1253

*/

1254

case '?': /* --help */

1255

argp_state_help(state, state->out_stream,

1256

(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)

1257

& ~(unsigned int)ARGP_HELP_EXIT_OK);

1258

case -3: /* --usage */

1259

argp_state_help(state, state->out_stream,

1260

ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);

1261

case 'V': /* --version */

1262

fprintf(state->out_stream, "%s\n", argp_program_version);

1263

exit(argp_err_exit_status);

1101

case ARGP_KEY_ARG:

1102

argp_usage(state);

1103

case ARGP_KEY_END:

1264

1104

break;

1265

1105

default:

1266

1106

return ARGP_ERR_UNKNOWN;

1267

1107

}

1268

return errno;

1108

return 0;

1269

1109

}

1270

1110

1271

1111

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

1272

1112

.args_doc = "",

1273

1113

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

1274

1114

" passwords from a Mandos server" };

1275

ret = argp_parse(&argp, argc, argv,

1276

ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);

1277

switch(ret){

1278

case 0:

1279

break;

1280

case ENOMEM:

1281

default:

1282

errno = ret;

1283

perror("argp_parse");

1284

exitcode = EX_OSERR;

1285

goto end;

1286

case EINVAL:

1287

exitcode = EX_USAGE;

1115

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

1116

if(ret == ARGP_ERR_UNKNOWN){

1117

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

1118

exitcode = EXIT_FAILURE;

1288

1119

goto end;

1289

1120

}

1290

1121

}

1292

1123

if(not debug){

1293

1124

avahi_set_log_function(empty_log);

1294

1125

}

1295

1296

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

1297

struct dirent **direntries;

1298

ret = scandir(sys_class_net, &direntries, good_interface,

1299

alphasort);

1300

if(ret >= 1){

1301

/* Pick the first good interface */

1302

interface = strdup(direntries[0]->d_name);

1303

if(debug){

1304

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

1305

}

1306

if(interface == NULL){

1307

perror("malloc");

1308

free(direntries);

1309

exitcode = EXIT_FAILURE;

1310

goto end;

1311

}

1312

free(direntries);

1313

} else {

1314

free(direntries);

1315

fprintf(stderr, "Could not find a network interface\n");

1316

exitcode = EXIT_FAILURE;

1317

goto end;

1318

}

1319

}

1320

1126

1321

1127

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

1322

1128

from the signal handler */

1325

1131

mc.simple_poll = avahi_simple_poll_new();

1326

1132

if(mc.simple_poll == NULL){

1327

1133

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

1328

exitcode = EX_UNAVAILABLE;

1134

exitcode = EXIT_FAILURE;

1329

1135

goto end;

1330

1136

}

1331

1137

1333

1139

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

1334

1140

if(ret == -1){

1335

1141

perror("sigaddset");

1336

exitcode = EX_OSERR;

1142

exitcode = EXIT_FAILURE;

1337

1143

goto end;

1338

1144

}

1339

1145

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

1340

1146

if(ret == -1){

1341

1147

perror("sigaddset");

1342

exitcode = EX_OSERR;

1148

exitcode = EXIT_FAILURE;

1343

1149

goto end;

1344

1150

}

1345

1151

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

1346

1152

if(ret == -1){

1347

1153

perror("sigaddset");

1348

exitcode = EX_OSERR;

1154

exitcode = EXIT_FAILURE;

1349

1155

goto end;

1350

1156

}

1351

1157

/* Need to check if the handler is SIG_IGN before handling:

1355

1161

ret = sigaction(SIGINT, NULL, &old_sigterm_action);

1356

1162

if(ret == -1){

1357

1163

perror("sigaction");

1358

return EX_OSERR;

1164

return EXIT_FAILURE;

1359

1165

}

1360

1166

if(old_sigterm_action.sa_handler != SIG_IGN){

1361

1167

ret = sigaction(SIGINT, &sigterm_action, NULL);

1362

1168

if(ret == -1){

1363

1169

perror("sigaction");

1364

exitcode = EX_OSERR;

1170

exitcode = EXIT_FAILURE;

1365

1171

goto end;

1366

1172

}

1367

1173

}

1368

1174

ret = sigaction(SIGHUP, NULL, &old_sigterm_action);

1369

1175

if(ret == -1){

1370

1176

perror("sigaction");

1371

return EX_OSERR;

1177

return EXIT_FAILURE;

1372

1178

}

1373

1179

if(old_sigterm_action.sa_handler != SIG_IGN){

1374

1180

ret = sigaction(SIGHUP, &sigterm_action, NULL);

1375

1181

if(ret == -1){

1376

1182

perror("sigaction");

1377

exitcode = EX_OSERR;

1183

exitcode = EXIT_FAILURE;

1378

1184

goto end;

1379

1185

}

1380

1186

}

1381

1187

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

1382

1188

if(ret == -1){

1383

1189

perror("sigaction");

1384

return EX_OSERR;

1190

return EXIT_FAILURE;

1385

1191

}

1386

1192

if(old_sigterm_action.sa_handler != SIG_IGN){

1387

1193

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

1388

1194

if(ret == -1){

1389

1195

perror("sigaction");

1390

exitcode = EX_OSERR;

1196

exitcode = EXIT_FAILURE;

1391

1197

goto end;

1392

1198

}

1393

1199

}

1394

1200

1395

1201

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

1396

if(strcmp(interface, "none") != 0){

1202

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

1397

1203

if_index = (AvahiIfIndex) if_nametoindex(interface);

1398

1204

if(if_index == 0){

1399

1205

fprintf(stderr, "No such interface: \"%s\"\n", interface);

1400

exitcode = EX_UNAVAILABLE;

1206

exitcode = EXIT_FAILURE;

1401

1207

goto end;

1402

1208

}

1403

1209

1414

1220

1415

1221

#ifdef __linux__

1416

1222

/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO

1417

messages about the network interface to mess up the prompt */

1223

messages to mess up the prompt */

1418

1224

ret = klogctl(8, NULL, 5);

1419

1225

bool restore_loglevel = true;

1420

1226

if(ret == -1){

1426

1232

sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);

1427

1233

if(sd < 0){

1428

1234

perror("socket");

1429

exitcode = EX_OSERR;

1235

exitcode = EXIT_FAILURE;

1430

1236

#ifdef __linux__

1431

1237

if(restore_loglevel){

1432

1238

ret = klogctl(7, NULL, 0);

1455

1261

}

1456

1262

}

1457

1263

#endif /* __linux__ */

1458

exitcode = EX_OSERR;

1264

exitcode = EXIT_FAILURE;

1459

1265

/* Lower privileges */

1460

1266

errno = 0;

1461

1267

ret = seteuid(uid);

1470

1276

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

1471

1277

if(ret == -1){

1472

1278

take_down_interface = false;

1473

perror("ioctl SIOCSIFFLAGS +IFF_UP");

1474

exitcode = EX_OSERR;

1279

perror("ioctl SIOCSIFFLAGS");

1280

exitcode = EXIT_FAILURE;

1475

1281

#ifdef __linux__

1476

1282

if(restore_loglevel){

1477

1283

ret = klogctl(7, NULL, 0);

1543

1349

ret = init_gnutls_global(pubkey, seckey);

1544

1350

if(ret == -1){

1545

1351

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

1546

exitcode = EX_UNAVAILABLE;

1352

exitcode = EXIT_FAILURE;

1547

1353

goto end;

1548

1354

} else {

1549

1355

gnutls_initialized = true;

1566

1372

1567

1373

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

1568

1374

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

1569

exitcode = EX_UNAVAILABLE;

1375

exitcode = EXIT_FAILURE;

1570

1376

goto end;

1571

1377

} else {

1572

1378

gpgme_initialized = true;

1582

1388

char *address = strrchr(connect_to, ':');

1583

1389

if(address == NULL){

1584

1390

fprintf(stderr, "No colon in address\n");

1585

exitcode = EX_USAGE;

1391

exitcode = EXIT_FAILURE;

1586

1392

goto end;

1587

1393

}

1588

1394

1596

1402

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

1597

1403

or tmpmax != (uint16_t)tmpmax){

1598

1404

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

1599

exitcode = EX_USAGE;

1405

exitcode = EXIT_FAILURE;

1600

1406

goto end;

1601

1407

}

1602

1408

1621

1427

1622

1428

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

1623

1429

if(ret < 0){

1624

switch(errno){

1625

case ENETUNREACH:

1626

case EHOSTDOWN:

1627

case EHOSTUNREACH:

1628

exitcode = EX_NOHOST;

1629

break;

1630

case EINVAL:

1631

exitcode = EX_USAGE;

1632

break;

1633

case EIO:

1634

exitcode = EX_IOERR;

1635

break;

1636

case EPROTO:

1637

exitcode = EX_PROTOCOL;

1638

break;

1639

default:

1640

exitcode = EX_OSERR;

1641

break;

1642

}

1430

exitcode = EXIT_FAILURE;

1643

1431

} else {

1644

1432

exitcode = EXIT_SUCCESS;

1645

1433

}

1672

1460

if(mc.server == NULL){

1673

1461

fprintf(stderr, "Failed to create Avahi server: %s\n",

1674

1462

avahi_strerror(error));

1675

exitcode = EX_UNAVAILABLE;

1463

exitcode = EXIT_FAILURE;

1676

1464

goto end;

1677

1465

}

1678

1466

1687

1475

if(sb == NULL){

1688

1476

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

1689

1477

avahi_strerror(avahi_server_errno(mc.server)));

1690

exitcode = EX_UNAVAILABLE;

1478

exitcode = EXIT_FAILURE;

1691

1479

goto end;

1692

1480

}

1693

1481

1742

1530

if(ret == -1){

1743

1531

perror("ioctl SIOCGIFFLAGS");

1744

1532

} else if(network.ifr_flags & IFF_UP) {

1745

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

1533

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

1746

1534

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

1747

1535

if(ret == -1){

1748

perror("ioctl SIOCSIFFLAGS -IFF_UP");

1536

perror("ioctl SIOCSIFFLAGS");

1749

1537

}

1750

1538

}

1751

1539

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