/mandos/trunk : revision 422

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, EXIT_FAILURE,

47

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

46

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

47

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 */

85

87

86

88

#ifdef __linux__

87

89

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

125

127

static const char mandos_protocol_version[] = "1";

126

128

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

127

129

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;

128

132

129

133

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

130

134

typedef struct {

552

556

gnutls_session_t session;

553

557

int pf; /* Protocol family */

554

558

559

errno = 0;

560

555

561

if(quit_now){

562

errno = EINTR;

556

563

return -1;

557

564

}

558

565

572

break;

566

573

default:

567

574

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

575

errno = EINVAL;

568

576

return -1;

569

577

}

570

578

580

588

581

589

tcp_sd = socket(pf, SOCK_STREAM, 0);

582

590

if(tcp_sd < 0){

591

int e = errno;

583

592

perror("socket");

593

errno = e;

584

594

goto mandos_end;

585

595

}

586

596

587

597

if(quit_now){

598

errno = EINTR;

588

599

goto mandos_end;

589

600

}

590

601

597

608

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

598

609

}

599

610

if(ret < 0 ){

611

int e = errno;

600

612

perror("inet_pton");

613

errno = e;

601

614

goto mandos_end;

602

615

}

603

616

if(ret == 0){

617

int e = errno;

604

618

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

619

errno = e;

605

620

goto mandos_end;

606

621

}

607

622

if(af == AF_INET6){

615

630

if(if_index == AVAHI_IF_UNSPEC){

616

631

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

617

632

" without a network interface\n");

633

errno = EINVAL;

618

634

goto mandos_end;

619

635

}

620

636

/* Set the network interface number as scope */

627

643

}

628

644

629

645

if(quit_now){

646

errno = EINTR;

630

647

goto mandos_end;

631

648

}

632

649

663

680

}

664

681

665

682

if(quit_now){

683

errno = EINTR;

666

684

goto mandos_end;

667

685

}

668

686

672

690

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

673

691

}

674

692

if(ret < 0){

693

int e = errno;

675

694

perror("connect");

695

errno = e;

676

696

goto mandos_end;

677

697

}

678

698

679

699

if(quit_now){

700

errno = EINTR;

680

701

goto mandos_end;

681

702

}

682

703

687

708

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

688

709

out_size - written));

689

710

if(ret == -1){

711

int e = errno;

690

712

perror("write");

713

errno = e;

691

714

goto mandos_end;

692

715

}

693

716

written += (size_t)ret;

703

726

}

704

727

705

728

if(quit_now){

729

errno = EINTR;

706

730

goto mandos_end;

707

731

}

708

732

}

712

736

}

713

737

714

738

if(quit_now){

739

errno = EINTR;

715

740

goto mandos_end;

716

741

}

717

742

718

743

gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);

719

744

720

745

if(quit_now){

746

errno = EINTR;

721

747

goto mandos_end;

722

748

}

723

749

724

750

do {

725

751

ret = gnutls_handshake(session);

726

752

if(quit_now){

753

errno = EINTR;

727

754

goto mandos_end;

728

755

}

729

756

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

733

760

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

734

761

gnutls_perror(ret);

735

762

}

763

errno = EPROTO;

736

764

goto mandos_end;

737

765

}

738

766

746

774

while(true){

747

775

748

776

if(quit_now){

777

errno = EINTR;

749

778

goto mandos_end;

750

779

}

751

780

752

781

buffer_capacity = incbuffer(&buffer, buffer_length,

753

782

buffer_capacity);

754

783

if(buffer_capacity == 0){

784

int e = errno;

755

785

perror("incbuffer");

786

errno = e;

756

787

goto mandos_end;

757

788

}

758

789

759

790

if(quit_now){

791

errno = EINTR;

760

792

goto mandos_end;

761

793

}

762

794

775

807

ret = gnutls_handshake(session);

776

808

777

809

if(quit_now){

810

errno = EINTR;

778

811

goto mandos_end;

779

812

}

780

813

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

781

814

if(ret < 0){

782

815

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

783

816

gnutls_perror(ret);

817

errno = EPROTO;

784

818

goto mandos_end;

785

819

}

786

820

break;

788

822

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

789

823

" encrypted session with Mandos server\n");

790

824

gnutls_bye(session, GNUTLS_SHUT_RDWR);

825

errno = EIO;

791

826

goto mandos_end;

792

827

}

793

828

} else {

800

835

}

801

836

802

837

if(quit_now){

838

errno = EINTR;

803

839

goto mandos_end;

804

840

}

805

841

806

842

do {

807

843

ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);

808

844

if(quit_now){

845

errno = EINTR;

809

846

goto mandos_end;

810

847

}

811

848

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

820

857

written = 0;

821

858

while(written < (size_t) decrypted_buffer_size){

822

859

if(quit_now){

860

errno = EINTR;

823

861

goto mandos_end;

824

862

}

825

863

827

865

(size_t)decrypted_buffer_size - written,

828

866

stdout);

829

867

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

868

int e = errno;

830

869

if(debug){

831

870

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

832

871

strerror(errno));

833

872

}

873

errno = e;

834

874

goto mandos_end;

835

875

}

836

876

written += (size_t)ret;

842

882

/* Shutdown procedure */

843

883

844

884

mandos_end:

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;

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;

856

904

}

857

905

return retval;

858

906

}

974

1022

errno = old_errno;

975

1023

}

976

1024

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

977

1120

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

978

1121

AvahiSServiceBrowser *sb = NULL;

979

1122

int error;

981

1124

intmax_t tmpmax;

982

1125

char *tmp;

983

1126

int exitcode = EXIT_SUCCESS;

984

const char *interface = "eth0";

1127

const char *interface = "";

985

1128

struct ifreq network;

986

1129

int sd = -1;

987

1130

bool take_down_interface = false;

988

1131

uid_t uid;

989

1132

gid_t gid;

990

char *connect_to = NULL;

991

1133

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

992

1134

bool tempdir_created = false;

993

1135

AvahiIfIndex if_index = AVAHI_IF_UNSPEC;

1056

1198

.arg = "SECONDS",

1057

1199

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

1058

1200

.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 },

1059

1210

{ .name = NULL }

1060

1211

};

1061

1212

1062

1213

error_t parse_opt(int key, char *arg,

1063

1214

struct argp_state *state){

1215

errno = 0;

1064

1216

switch(key){

1065

1217

case 128: /* --debug */

1066

1218

debug = true;

1082

1234

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

1083

1235

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

1084

1236

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

1085

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

1086

exit(EXIT_FAILURE);

1237

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

1087

1238

}

1088

1239

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

1089

1240

break;

1094

1245

errno = 0;

1095

1246

delay = strtof(arg, &tmp);

1096

1247

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

1097

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

1098

exit(EXIT_FAILURE);

1248

argp_error(state, "Bad delay");

1099

1249

}

1100

1250

break;

1101

case ARGP_KEY_ARG:

1102

argp_usage(state);

1103

case ARGP_KEY_END:

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);

1104

1264

break;

1105

1265

default:

1106

1266

return ARGP_ERR_UNKNOWN;

1107

1267

}

1108

return 0;

1268

return errno;

1109

1269

}

1110

1270

1111

1271

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

1112

1272

.args_doc = "",

1113

1273

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

1114

1274

" passwords from a Mandos server" };

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;

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;

1119

1288

goto end;

1120

1289

}

1121

1290

}

1123

1292

if(not debug){

1124

1293

avahi_set_log_function(empty_log);

1125

1294

}

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

}

1126

1320

1127

1321

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

1128

1322

from the signal handler */

1131

1325

mc.simple_poll = avahi_simple_poll_new();

1132

1326

if(mc.simple_poll == NULL){

1133

1327

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

1134

exitcode = EXIT_FAILURE;

1328

exitcode = EX_UNAVAILABLE;

1135

1329

goto end;

1136

1330

}

1137

1331

1139

1333

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

1140

1334

if(ret == -1){

1141

1335

perror("sigaddset");

1142

exitcode = EXIT_FAILURE;

1336

exitcode = EX_OSERR;

1143

1337

goto end;

1144

1338

}

1145

1339

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

1146

1340

if(ret == -1){

1147

1341

perror("sigaddset");

1148

exitcode = EXIT_FAILURE;

1342

exitcode = EX_OSERR;

1149

1343

goto end;

1150

1344

}

1151

1345

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

1152

1346

if(ret == -1){

1153

1347

perror("sigaddset");

1154

exitcode = EXIT_FAILURE;

1348

exitcode = EX_OSERR;

1155

1349

goto end;

1156

1350

}

1157

1351

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

1161

1355

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

1162

1356

if(ret == -1){

1163

1357

perror("sigaction");

1164

return EXIT_FAILURE;

1358

return EX_OSERR;

1165

1359

}

1166

1360

if(old_sigterm_action.sa_handler != SIG_IGN){

1167

1361

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

1168

1362

if(ret == -1){

1169

1363

perror("sigaction");

1170

exitcode = EXIT_FAILURE;

1364

exitcode = EX_OSERR;

1171

1365

goto end;

1172

1366

}

1173

1367

}

1174

1368

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

1175

1369

if(ret == -1){

1176

1370

perror("sigaction");

1177

return EXIT_FAILURE;

1371

return EX_OSERR;

1178

1372

}

1179

1373

if(old_sigterm_action.sa_handler != SIG_IGN){

1180

1374

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

1181

1375

if(ret == -1){

1182

1376

perror("sigaction");

1183

exitcode = EXIT_FAILURE;

1377

exitcode = EX_OSERR;

1184

1378

goto end;

1185

1379

}

1186

1380

}

1187

1381

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

1188

1382

if(ret == -1){

1189

1383

perror("sigaction");

1190

return EXIT_FAILURE;

1384

return EX_OSERR;

1191

1385

}

1192

1386

if(old_sigterm_action.sa_handler != SIG_IGN){

1193

1387

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

1194

1388

if(ret == -1){

1195

1389

perror("sigaction");

1196

exitcode = EXIT_FAILURE;

1390

exitcode = EX_OSERR;

1197

1391

goto end;

1198

1392

}

1199

1393

}

1200

1394

1201

1395

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

1202

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

1396

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

1203

1397

if_index = (AvahiIfIndex) if_nametoindex(interface);

1204

1398

if(if_index == 0){

1205

1399

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

1206

exitcode = EXIT_FAILURE;

1400

exitcode = EX_UNAVAILABLE;

1207

1401

goto end;

1208

1402

}

1209

1403

1220

1414

1221

1415

#ifdef __linux__

1222

1416

/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO

1223

messages to mess up the prompt */

1417

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

1224

1418

ret = klogctl(8, NULL, 5);

1225

1419

bool restore_loglevel = true;

1226

1420

if(ret == -1){

1232

1426

sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);

1233

1427

if(sd < 0){

1234

1428

perror("socket");

1235

exitcode = EXIT_FAILURE;

1429

exitcode = EX_OSERR;

1236

1430

#ifdef __linux__

1237

1431

if(restore_loglevel){

1238

1432

ret = klogctl(7, NULL, 0);

1261

1455

}

1262

1456

}

1263

1457

#endif /* __linux__ */

1264

exitcode = EXIT_FAILURE;

1458

exitcode = EX_OSERR;

1265

1459

/* Lower privileges */

1266

1460

errno = 0;

1267

1461

ret = seteuid(uid);

1276

1470

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

1277

1471

if(ret == -1){

1278

1472

take_down_interface = false;

1279

perror("ioctl SIOCSIFFLAGS");

1280

exitcode = EXIT_FAILURE;

1473

perror("ioctl SIOCSIFFLAGS +IFF_UP");

1474

exitcode = EX_OSERR;

1281

1475

#ifdef __linux__

1282

1476

if(restore_loglevel){

1283

1477

ret = klogctl(7, NULL, 0);

1349

1543

ret = init_gnutls_global(pubkey, seckey);

1350

1544

if(ret == -1){

1351

1545

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

1352

exitcode = EXIT_FAILURE;

1546

exitcode = EX_UNAVAILABLE;

1353

1547

goto end;

1354

1548

} else {

1355

1549

gnutls_initialized = true;

1372

1566

1373

1567

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

1374

1568

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

1375

exitcode = EXIT_FAILURE;

1569

exitcode = EX_UNAVAILABLE;

1376

1570

goto end;

1377

1571

} else {

1378

1572

gpgme_initialized = true;

1388

1582

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

1389

1583

if(address == NULL){

1390

1584

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

1391

exitcode = EXIT_FAILURE;

1585

exitcode = EX_USAGE;

1392

1586

goto end;

1393

1587

}

1394

1588

1402

1596

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

1403

1597

or tmpmax != (uint16_t)tmpmax){

1404

1598

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

1405

exitcode = EXIT_FAILURE;

1599

exitcode = EX_USAGE;

1406

1600

goto end;

1407

1601

}

1408

1602

1427

1621

1428

1622

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

1429

1623

if(ret < 0){

1430

exitcode = EXIT_FAILURE;

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

}

1431

1643

} else {

1432

1644

exitcode = EXIT_SUCCESS;

1433

1645

}

1460

1672

if(mc.server == NULL){

1461

1673

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

1462

1674

avahi_strerror(error));

1463

exitcode = EXIT_FAILURE;

1675

exitcode = EX_UNAVAILABLE;

1464

1676

goto end;

1465

1677

}

1466

1678

1475

1687

if(sb == NULL){

1476

1688

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

1477

1689

avahi_strerror(avahi_server_errno(mc.server)));

1478

exitcode = EXIT_FAILURE;

1690

exitcode = EX_UNAVAILABLE;

1479

1691

goto end;

1480

1692

}

1481

1693

1530

1742

if(ret == -1){

1531

1743

perror("ioctl SIOCGIFFLAGS");

1532

1744

} else if(network.ifr_flags & IFF_UP) {

1533

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

1745

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

1534

1746

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

1535

1747

if(ret == -1){

1536

perror("ioctl SIOCSIFFLAGS");

1748

perror("ioctl SIOCSIFFLAGS -IFF_UP");

1537

1749

}

1538

1750

}

1539

1751

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