/mandos/release : revision 237.2.139

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() */

63

strtoimax() */

64

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

65

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

66

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

66

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

67

#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,

68

SIOCSIFFLAGS, if_indextoname(),

69

if_nametoindex(), IF_NAMESIZE */

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

if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){

694

int e = errno;

695

perror("connect");

696

errno = e;

697

}

675

perror("connect");

698

676

goto mandos_end;

699

677

}

700

678

701

679

if(quit_now){

702

errno = EINTR;

703

680

goto mandos_end;

704

681

}

705

682

710

687

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

711

688

out_size - written));

712

689

if(ret == -1){

713

int e = errno;

714

690

perror("write");

715

errno = e;

716

691

goto mandos_end;

717

692

}

718

693

written += (size_t)ret;

728

703

}

729

704

730

705

if(quit_now){

731

errno = EINTR;

732

706

goto mandos_end;

733

707

}

734

708

}

738

712

}

739

713

740

714

if(quit_now){

741

errno = EINTR;

742

715

goto mandos_end;

743

716

}

744

717

745

718

gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);

746

719

747

720

if(quit_now){

748

errno = EINTR;

749

721

goto mandos_end;

750

722

}

751

723

752

724

do {

753

725

ret = gnutls_handshake(session);

754

726

if(quit_now){

755

errno = EINTR;

756

727

goto mandos_end;

757

728

}

758

729

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

762

733

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

763

734

gnutls_perror(ret);

764

735

}

765

errno = EPROTO;

766

736

goto mandos_end;

767

737

}

768

738

776

746

while(true){

777

747

778

748

if(quit_now){

779

errno = EINTR;

780

749

goto mandos_end;

781

750

}

782

751

783

752

buffer_capacity = incbuffer(&buffer, buffer_length,

784

753

buffer_capacity);

785

754

if(buffer_capacity == 0){

786

int e = errno;

787

755

perror("incbuffer");

788

errno = e;

789

756

goto mandos_end;

790

757

}

791

758

792

759

if(quit_now){

793

errno = EINTR;

794

760

goto mandos_end;

795

761

}

796

762

809

775

ret = gnutls_handshake(session);

810

776

811

777

if(quit_now){

812

errno = EINTR;

813

778

goto mandos_end;

814

779

}

815

780

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

816

781

if(ret < 0){

817

782

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

818

783

gnutls_perror(ret);

819

errno = EPROTO;

820

784

goto mandos_end;

821

785

}

822

786

break;

824

788

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

825

789

" encrypted session with Mandos server\n");

826

790

gnutls_bye(session, GNUTLS_SHUT_RDWR);

827

errno = EIO;

828

791

goto mandos_end;

829

792

}

830

793

} else {

837

800

}

838

801

839

802

if(quit_now){

840

errno = EINTR;

841

803

goto mandos_end;

842

804

}

843

805

844

806

do {

845

807

ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);

846

808

if(quit_now){

847

errno = EINTR;

848

809

goto mandos_end;

849

810

}

850

811

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

859

820

written = 0;

860

821

while(written < (size_t) decrypted_buffer_size){

861

822

if(quit_now){

862

errno = EINTR;

863

823

goto mandos_end;

864

824

}

865

825

867

827

(size_t)decrypted_buffer_size - written,

868

828

stdout);

869

829

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

870

int e = errno;

871

830

if(debug){

872

831

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

873

832

strerror(errno));

874

833

}

875

errno = e;

876

834

goto mandos_end;

877

835

}

878

836

written += (size_t)ret;

884

842

/* Shutdown procedure */

885

843

886

844

mandos_end:

887

{

888

int e = errno;

889

free(decrypted_buffer);

890

free(buffer);

891

if(tcp_sd >= 0){

892

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

893

}

894

if(ret == -1){

895

if(e == 0){

896

e = errno;

897

}

898

perror("close");

899

}

900

gnutls_deinit(session);

901

if(quit_now){

902

e = EINTR;

903

retval = -1;

904

}

905

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;

906

856

}

907

857

return retval;

908

858

}

1024

974

errno = old_errno;

1025

975

}

1026

976

1027

/*

1028

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

1029

* corresponds to an acceptable network device.

1030

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

1031

*/

1032

int good_interface(const struct dirent *if_entry){

1033

ssize_t ssret;

1034

char *flagname = NULL;

1035

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

1036

if_entry->d_name);

1037

if(ret < 0){

1038

perror("asprintf");

1039

return 0;

1040

}

1041

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

1042

return 0;

1043

}

1044

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

1045

if(flags_fd == -1){

1046

perror("open");

1047

return 0;

1048

}

1049

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

1050

/* read line from flags_fd */

1051

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

1052

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

1053

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

1054

if(flagstring == NULL){

1055

perror("malloc");

1056

close(flags_fd);

1057

return 0;

1058

}

1059

while(to_read > 0){

1060

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

1061

(size_t)to_read));

1062

if(ssret == -1){

1063

perror("read");

1064

free(flagstring);

1065

close(flags_fd);

1066

return 0;

1067

}

1068

to_read -= ssret;

1069

if(ssret == 0){

1070

break;

1071

}

1072

}

1073

close(flags_fd);

1074

intmax_t tmpmax;

1075

char *tmp;

1076

errno = 0;

1077

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

1078

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

1079

and not (isspace(*tmp)))

1080

or tmpmax != (ifreq_flags)tmpmax){

1081

if(debug){

1082

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

1083

flagstring, if_entry->d_name);

1084

}

1085

free(flagstring);

1086

return 0;

1087

}

1088

free(flagstring);

1089

ifreq_flags flags = (ifreq_flags)tmpmax;

1090

/* Reject the loopback device */

1091

if(flags & IFF_LOOPBACK){

1092

if(debug){

1093

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

1094

if_entry->d_name);

1095

}

1096

return 0;

1097

}

1098

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

1099

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

1100

if(debug){

1101

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

1102

if_entry->d_name);

1103

}

1104

return 1;

1105

}

1106

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

1107

if(not (flags & IFF_BROADCAST)){

1108

if(debug){

1109

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

1110

if_entry->d_name);

1111

}

1112

return 0;

1113

}

1114

/* Accept this device */

1115

if(debug){

1116

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

1117

if_entry->d_name);

1118

}

1119

return 1;

1120

}

1121

1122

977

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

1123

978

AvahiSServiceBrowser *sb = NULL;

1124

979

int error;

1126

981

intmax_t tmpmax;

1127

982

char *tmp;

1128

983

int exitcode = EXIT_SUCCESS;

1129

const char *interface = "";

984

const char *interface = "eth0";

1130

985

struct ifreq network;

1131

986

int sd = -1;

1132

987

bool take_down_interface = false;

1133

988

uid_t uid;

1134

989

gid_t gid;

990

char *connect_to = NULL;

1135

991

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

1136

992

bool tempdir_created = false;

1137

993

AvahiIfIndex if_index = AVAHI_IF_UNSPEC;

1200

1056

.arg = "SECONDS",

1201

1057

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

1202

1058

.group = 2 },

1203

/*

1204

* These reproduce what we would get without ARGP_NO_HELP

1205

*/

1206

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

1207

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

1208

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

1209

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

1210

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

1211

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

1212

1059

{ .name = NULL }

1213

1060

};

1214

1061

1215

1062

error_t parse_opt(int key, char *arg,

1216

1063

struct argp_state *state){

1217

errno = 0;

1218

1064

switch(key){

1219

1065

case 128: /* --debug */

1220

1066

debug = true;

1236

1082

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

1237

1083

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

1238

1084

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

1239

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

1085

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

1086

exit(EXIT_FAILURE);

1240

1087

}

1241

1088

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

1242

1089

break;

1247

1094

errno = 0;

1248

1095

delay = strtof(arg, &tmp);

1249

1096

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

1250

argp_error(state, "Bad delay");

1097

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

1098

exit(EXIT_FAILURE);

1251

1099

}

1252

1100

break;

1253

/*

1254

* These reproduce what we would get without ARGP_NO_HELP

1255

*/

1256

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

1257

argp_state_help(state, state->out_stream,

1258

(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)

1259

& ~(unsigned int)ARGP_HELP_EXIT_OK);

1260

case -3: /* --usage */

1261

argp_state_help(state, state->out_stream,

1262

ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);

1263

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

1264

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

1265

exit(argp_err_exit_status);

1101

case ARGP_KEY_ARG:

1102

argp_usage(state);

1103

case ARGP_KEY_END:

1266

1104

break;

1267

1105

default:

1268

1106

return ARGP_ERR_UNKNOWN;

1269

1107

}

1270

return errno;

1108

return 0;

1271

1109

}

1272

1110

1273

1111

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

1274

1112

.args_doc = "",

1275

1113

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

1276

1114

" passwords from a Mandos server" };

1277

ret = argp_parse(&argp, argc, argv,

1278

ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);

1279

switch(ret){

1280

case 0:

1281

break;

1282

case ENOMEM:

1283

default:

1284

errno = ret;

1285

perror("argp_parse");

1286

exitcode = EX_OSERR;

1287

goto end;

1288

case EINVAL:

1289

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;

1290

1119

goto end;

1291

1120

}

1292

1121

}

1294

1123

if(not debug){

1295

1124

avahi_set_log_function(empty_log);

1296

1125

}

1297

1298

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

1299

struct dirent **direntries;

1300

ret = scandir(sys_class_net, &direntries, good_interface,

1301

alphasort);

1302

if(ret >= 1){

1303

/* Pick the first good interface */

1304

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

1305

if(debug){

1306

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

1307

}

1308

if(interface == NULL){

1309

perror("malloc");

1310

free(direntries);

1311

exitcode = EXIT_FAILURE;

1312

goto end;

1313

}

1314

free(direntries);

1315

} else {

1316

free(direntries);

1317

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

1318

exitcode = EXIT_FAILURE;

1319

goto end;

1320

}

1321

}

1322

1126

1323

1127

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

1324

1128

from the signal handler */

1327

1131

mc.simple_poll = avahi_simple_poll_new();

1328

1132

if(mc.simple_poll == NULL){

1329

1133

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

1330

exitcode = EX_UNAVAILABLE;

1134

exitcode = EXIT_FAILURE;

1331

1135

goto end;

1332

1136

}

1333

1137

1335

1139

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

1336

1140

if(ret == -1){

1337

1141

perror("sigaddset");

1338

exitcode = EX_OSERR;

1142

exitcode = EXIT_FAILURE;

1339

1143

goto end;

1340

1144

}

1341

1145

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

1342

1146

if(ret == -1){

1343

1147

perror("sigaddset");

1344

exitcode = EX_OSERR;

1148

exitcode = EXIT_FAILURE;

1345

1149

goto end;

1346

1150

}

1347

1151

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

1348

1152

if(ret == -1){

1349

1153

perror("sigaddset");

1350

exitcode = EX_OSERR;

1154

exitcode = EXIT_FAILURE;

1351

1155

goto end;

1352

1156

}

1353

1157

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

1357

1161

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

1358

1162

if(ret == -1){

1359

1163

perror("sigaction");

1360

return EX_OSERR;

1164

return EXIT_FAILURE;

1361

1165

}

1362

1166

if(old_sigterm_action.sa_handler != SIG_IGN){

1363

1167

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

1364

1168

if(ret == -1){

1365

1169

perror("sigaction");

1366

exitcode = EX_OSERR;

1170

exitcode = EXIT_FAILURE;

1367

1171

goto end;

1368

1172

}

1369

1173

}

1370

1174

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

1371

1175

if(ret == -1){

1372

1176

perror("sigaction");

1373

return EX_OSERR;

1177

return EXIT_FAILURE;

1374

1178

}

1375

1179

if(old_sigterm_action.sa_handler != SIG_IGN){

1376

1180

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

1377

1181

if(ret == -1){

1378

1182

perror("sigaction");

1379

exitcode = EX_OSERR;

1183

exitcode = EXIT_FAILURE;

1380

1184

goto end;

1381

1185

}

1382

1186

}

1383

1187

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

1384

1188

if(ret == -1){

1385

1189

perror("sigaction");

1386

return EX_OSERR;

1190

return EXIT_FAILURE;

1387

1191

}

1388

1192

if(old_sigterm_action.sa_handler != SIG_IGN){

1389

1193

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

1390

1194

if(ret == -1){

1391

1195

perror("sigaction");

1392

exitcode = EX_OSERR;

1196

exitcode = EXIT_FAILURE;

1393

1197

goto end;

1394

1198

}

1395

1199

}

1396

1200

1397

1201

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

1398

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

1202

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

1399

1203

if_index = (AvahiIfIndex) if_nametoindex(interface);

1400

1204

if(if_index == 0){

1401

1205

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

1402

exitcode = EX_UNAVAILABLE;

1206

exitcode = EXIT_FAILURE;

1403

1207

goto end;

1404

1208

}

1405

1209

1416

1220

1417

1221

#ifdef __linux__

1418

1222

/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO

1419

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

1223

messages to mess up the prompt */

1420

1224

ret = klogctl(8, NULL, 5);

1421

1225

bool restore_loglevel = true;

1422

1226

if(ret == -1){

1428

1232

sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);

1429

1233

if(sd < 0){

1430

1234

perror("socket");

1431

exitcode = EX_OSERR;

1235

exitcode = EXIT_FAILURE;

1432

1236

#ifdef __linux__

1433

1237

if(restore_loglevel){

1434

1238

ret = klogctl(7, NULL, 0);

1457

1261

}

1458

1262

}

1459

1263

#endif /* __linux__ */

1460

exitcode = EX_OSERR;

1264

exitcode = EXIT_FAILURE;

1461

1265

/* Lower privileges */

1462

1266

errno = 0;

1463

1267

ret = seteuid(uid);

1472

1276

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

1473

1277

if(ret == -1){

1474

1278

take_down_interface = false;

1475

perror("ioctl SIOCSIFFLAGS +IFF_UP");

1476

exitcode = EX_OSERR;

1279

perror("ioctl SIOCSIFFLAGS");

1280

exitcode = EXIT_FAILURE;

1477

1281

#ifdef __linux__

1478

1282

if(restore_loglevel){

1479

1283

ret = klogctl(7, NULL, 0);

1545

1349

ret = init_gnutls_global(pubkey, seckey);

1546

1350

if(ret == -1){

1547

1351

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

1548

exitcode = EX_UNAVAILABLE;

1352

exitcode = EXIT_FAILURE;

1549

1353

goto end;

1550

1354

} else {

1551

1355

gnutls_initialized = true;

1568

1372

1569

1373

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

1570

1374

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

1571

exitcode = EX_UNAVAILABLE;

1375

exitcode = EXIT_FAILURE;

1572

1376

goto end;

1573

1377

} else {

1574

1378

gpgme_initialized = true;

1584

1388

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

1585

1389

if(address == NULL){

1586

1390

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

1587

exitcode = EX_USAGE;

1391

exitcode = EXIT_FAILURE;

1588

1392

goto end;

1589

1393

}

1590

1394

1598

1402

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

1599

1403

or tmpmax != (uint16_t)tmpmax){

1600

1404

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

1601

exitcode = EX_USAGE;

1405

exitcode = EXIT_FAILURE;

1602

1406

goto end;

1603

1407

}

1604

1408

1620

1424

if(quit_now){

1621

1425

goto end;

1622

1426

}

1623

1624

while(not quit_now){

1625

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

1626

if(quit_now or ret == 0){

1627

break;

1628

}

1629

sleep(15);

1630

};

1631

1632

if (not quit_now){

1427

1428

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

1429

if(ret < 0){

1430

exitcode = EXIT_FAILURE;

1431

} else {

1633

1432

exitcode = EXIT_SUCCESS;

1634

1433

}

1635

1636

1434

goto end;

1637

1435

}

1638

1436

1662

1460

if(mc.server == NULL){

1663

1461

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

1664

1462

avahi_strerror(error));

1665

exitcode = EX_UNAVAILABLE;

1463

exitcode = EXIT_FAILURE;

1666

1464

goto end;

1667

1465

}

1668

1466

1677

1475

if(sb == NULL){

1678

1476

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

1679

1477

avahi_strerror(avahi_server_errno(mc.server)));

1680

exitcode = EX_UNAVAILABLE;

1478

exitcode = EXIT_FAILURE;

1681

1479

goto end;

1682

1480

}

1683

1481

1732

1530

if(ret == -1){

1733

1531

perror("ioctl SIOCGIFFLAGS");

1734

1532

} else if(network.ifr_flags & IFF_UP) {

1735

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

1533

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

1736

1534

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

1737

1535

if(ret == -1){

1738

perror("ioctl SIOCSIFFLAGS -IFF_UP");

1536

perror("ioctl SIOCSIFFLAGS");

1739

1537

}

1740

1538

}

1741

1539

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