/mandos/trunk : revision 24.1.164

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() */

63

strtoimax() */

64

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

65

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

66

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

66

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

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 */

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){

675

perror("connect");

693

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

694

int e = errno;

695

perror("connect");

696

errno = e;

697

}

676

698

goto mandos_end;

677

699

}

678

700

679

701

if(quit_now){

702

errno = EINTR;

680

703

goto mandos_end;

681

704

}

682

705

687

710

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

688

711

out_size - written));

689

712

if(ret == -1){

713

int e = errno;

690

714

perror("write");

715

errno = e;

691

716

goto mandos_end;

692

717

}

693

718

written += (size_t)ret;

703

728

}

704

729

705

730

if(quit_now){

731

errno = EINTR;

706

732

goto mandos_end;

707

733

}

708

734

}

712

738

}

713

739

714

740

if(quit_now){

741

errno = EINTR;

715

742

goto mandos_end;

716

743

}

717

744

718

745

gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);

719

746

720

747

if(quit_now){

748

errno = EINTR;

721

749

goto mandos_end;

722

750

}

723

751

724

752

do {

725

753

ret = gnutls_handshake(session);

726

754

if(quit_now){

755

errno = EINTR;

727

756

goto mandos_end;

728

757

}

729

758

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

733

762

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

734

763

gnutls_perror(ret);

735

764

}

765

errno = EPROTO;

736

766

goto mandos_end;

737

767

}

738

768

746

776

while(true){

747

777

748

778

if(quit_now){

779

errno = EINTR;

749

780

goto mandos_end;

750

781

}

751

782

752

783

buffer_capacity = incbuffer(&buffer, buffer_length,

753

784

buffer_capacity);

754

785

if(buffer_capacity == 0){

786

int e = errno;

755

787

perror("incbuffer");

788

errno = e;

756

789

goto mandos_end;

757

790

}

758

791

759

792

if(quit_now){

793

errno = EINTR;

760

794

goto mandos_end;

761

795

}

762

796

775

809

ret = gnutls_handshake(session);

776

810

777

811

if(quit_now){

812

errno = EINTR;

778

813

goto mandos_end;

779

814

}

780

815

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

781

816

if(ret < 0){

782

817

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

783

818

gnutls_perror(ret);

819

errno = EPROTO;

784

820

goto mandos_end;

785

821

}

786

822

break;

788

824

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

789

825

" encrypted session with Mandos server\n");

790

826

gnutls_bye(session, GNUTLS_SHUT_RDWR);

827

errno = EIO;

791

828

goto mandos_end;

792

829

}

793

830

} else {

800

837

}

801

838

802

839

if(quit_now){

840

errno = EINTR;

803

841

goto mandos_end;

804

842

}

805

843

806

844

do {

807

845

ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);

808

846

if(quit_now){

847

errno = EINTR;

809

848

goto mandos_end;

810

849

}

811

850

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

820

859

written = 0;

821

860

while(written < (size_t) decrypted_buffer_size){

822

861

if(quit_now){

862

errno = EINTR;

823

863

goto mandos_end;

824

864

}

825

865

827

867

(size_t)decrypted_buffer_size - written,

828

868

stdout);

829

869

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

870

int e = errno;

830

871

if(debug){

831

872

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

832

873

strerror(errno));

833

874

}

875

errno = e;

834

876

goto mandos_end;

835

877

}

836

878

written += (size_t)ret;

842

884

/* Shutdown procedure */

843

885

844

886

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;

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;

856

906

}

857

907

return retval;

858

908

}

974

1024

errno = old_errno;

975

1025

}

976

1026

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

977

1122

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

978

1123

AvahiSServiceBrowser *sb = NULL;

979

1124

int error;

981

1126

intmax_t tmpmax;

982

1127

char *tmp;

983

1128

int exitcode = EXIT_SUCCESS;

984

const char *interface = "eth0";

1129

const char *interface = "";

985

1130

struct ifreq network;

986

1131

int sd = -1;

987

1132

bool take_down_interface = false;

988

1133

uid_t uid;

989

1134

gid_t gid;

990

char *connect_to = NULL;

991

1135

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

992

1136

bool tempdir_created = false;

993

1137

AvahiIfIndex if_index = AVAHI_IF_UNSPEC;

1056

1200

.arg = "SECONDS",

1057

1201

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

1058

1202

.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 },

1059

1212

{ .name = NULL }

1060

1213

};

1061

1214

1062

1215

error_t parse_opt(int key, char *arg,

1063

1216

struct argp_state *state){

1217

errno = 0;

1064

1218

switch(key){

1065

1219

case 128: /* --debug */

1066

1220

debug = true;

1082

1236

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

1083

1237

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

1084

1238

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

1085

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

1086

exit(EXIT_FAILURE);

1239

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

1087

1240

}

1088

1241

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

1089

1242

break;

1094

1247

errno = 0;

1095

1248

delay = strtof(arg, &tmp);

1096

1249

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

1097

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

1098

exit(EXIT_FAILURE);

1250

argp_error(state, "Bad delay");

1099

1251

}

1100

1252

break;

1101

case ARGP_KEY_ARG:

1102

argp_usage(state);

1103

case ARGP_KEY_END:

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);

1104

1266

break;

1105

1267

default:

1106

1268

return ARGP_ERR_UNKNOWN;

1107

1269

}

1108

return 0;

1270

return errno;

1109

1271

}

1110

1272

1111

1273

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

1112

1274

.args_doc = "",

1113

1275

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

1114

1276

" 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;

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;

1119

1290

goto end;

1120

1291

}

1121

1292

}

1123

1294

if(not debug){

1124

1295

avahi_set_log_function(empty_log);

1125

1296

}

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

}

1126

1322

1127

1323

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

1128

1324

from the signal handler */

1131

1327

mc.simple_poll = avahi_simple_poll_new();

1132

1328

if(mc.simple_poll == NULL){

1133

1329

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

1134

exitcode = EXIT_FAILURE;

1330

exitcode = EX_UNAVAILABLE;

1135

1331

goto end;

1136

1332

}

1137

1333

1139

1335

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

1140

1336

if(ret == -1){

1141

1337

perror("sigaddset");

1142

exitcode = EXIT_FAILURE;

1338

exitcode = EX_OSERR;

1143

1339

goto end;

1144

1340

}

1145

1341

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

1146

1342

if(ret == -1){

1147

1343

perror("sigaddset");

1148

exitcode = EXIT_FAILURE;

1344

exitcode = EX_OSERR;

1149

1345

goto end;

1150

1346

}

1151

1347

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

1152

1348

if(ret == -1){

1153

1349

perror("sigaddset");

1154

exitcode = EXIT_FAILURE;

1350

exitcode = EX_OSERR;

1155

1351

goto end;

1156

1352

}

1157

1353

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

1161

1357

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

1162

1358

if(ret == -1){

1163

1359

perror("sigaction");

1164

return EXIT_FAILURE;

1360

return EX_OSERR;

1165

1361

}

1166

1362

if(old_sigterm_action.sa_handler != SIG_IGN){

1167

1363

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

1168

1364

if(ret == -1){

1169

1365

perror("sigaction");

1170

exitcode = EXIT_FAILURE;

1366

exitcode = EX_OSERR;

1171

1367

goto end;

1172

1368

}

1173

1369

}

1174

1370

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

1175

1371

if(ret == -1){

1176

1372

perror("sigaction");

1177

return EXIT_FAILURE;

1373

return EX_OSERR;

1178

1374

}

1179

1375

if(old_sigterm_action.sa_handler != SIG_IGN){

1180

1376

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

1181

1377

if(ret == -1){

1182

1378

perror("sigaction");

1183

exitcode = EXIT_FAILURE;

1379

exitcode = EX_OSERR;

1184

1380

goto end;

1185

1381

}

1186

1382

}

1187

1383

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

1188

1384

if(ret == -1){

1189

1385

perror("sigaction");

1190

return EXIT_FAILURE;

1386

return EX_OSERR;

1191

1387

}

1192

1388

if(old_sigterm_action.sa_handler != SIG_IGN){

1193

1389

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

1194

1390

if(ret == -1){

1195

1391

perror("sigaction");

1196

exitcode = EXIT_FAILURE;

1392

exitcode = EX_OSERR;

1197

1393

goto end;

1198

1394

}

1199

1395

}

1200

1396

1201

1397

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

1202

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

1398

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

1203

1399

if_index = (AvahiIfIndex) if_nametoindex(interface);

1204

1400

if(if_index == 0){

1205

1401

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

1206

exitcode = EXIT_FAILURE;

1402

exitcode = EX_UNAVAILABLE;

1207

1403

goto end;

1208

1404

}

1209

1405

1220

1416

1221

1417

#ifdef __linux__

1222

1418

/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO

1223

messages to mess up the prompt */

1419

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

1224

1420

ret = klogctl(8, NULL, 5);

1225

1421

bool restore_loglevel = true;

1226

1422

if(ret == -1){

1232

1428

sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);

1233

1429

if(sd < 0){

1234

1430

perror("socket");

1235

exitcode = EXIT_FAILURE;

1431

exitcode = EX_OSERR;

1236

1432

#ifdef __linux__

1237

1433

if(restore_loglevel){

1238

1434

ret = klogctl(7, NULL, 0);

1261

1457

}

1262

1458

}

1263

1459

#endif /* __linux__ */

1264

exitcode = EXIT_FAILURE;

1460

exitcode = EX_OSERR;

1265

1461

/* Lower privileges */

1266

1462

errno = 0;

1267

1463

ret = seteuid(uid);

1276

1472

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

1277

1473

if(ret == -1){

1278

1474

take_down_interface = false;

1279

perror("ioctl SIOCSIFFLAGS");

1280

exitcode = EXIT_FAILURE;

1475

perror("ioctl SIOCSIFFLAGS +IFF_UP");

1476

exitcode = EX_OSERR;

1281

1477

#ifdef __linux__

1282

1478

if(restore_loglevel){

1283

1479

ret = klogctl(7, NULL, 0);

1349

1545

ret = init_gnutls_global(pubkey, seckey);

1350

1546

if(ret == -1){

1351

1547

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

1352

exitcode = EXIT_FAILURE;

1548

exitcode = EX_UNAVAILABLE;

1353

1549

goto end;

1354

1550

} else {

1355

1551

gnutls_initialized = true;

1372

1568

1373

1569

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

1374

1570

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

1375

exitcode = EXIT_FAILURE;

1571

exitcode = EX_UNAVAILABLE;

1376

1572

goto end;

1377

1573

} else {

1378

1574

gpgme_initialized = true;

1388

1584

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

1389

1585

if(address == NULL){

1390

1586

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

1391

exitcode = EXIT_FAILURE;

1587

exitcode = EX_USAGE;

1392

1588

goto end;

1393

1589

}

1394

1590

1402

1598

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

1403

1599

or tmpmax != (uint16_t)tmpmax){

1404

1600

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

1405

exitcode = EXIT_FAILURE;

1601

exitcode = EX_USAGE;

1406

1602

goto end;

1407

1603

}

1408

1604

1424

1620

if(quit_now){

1425

1621

goto end;

1426

1622

}

1427

1428

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

1429

if(ret < 0){

1430

exitcode = EXIT_FAILURE;

1431

} else {

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){

1432

1633

exitcode = EXIT_SUCCESS;

1433

1634

}

1635

1434

1636

goto end;

1435

1637

}

1436

1638

1460

1662

if(mc.server == NULL){

1461

1663

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

1462

1664

avahi_strerror(error));

1463

exitcode = EXIT_FAILURE;

1665

exitcode = EX_UNAVAILABLE;

1464

1666

goto end;

1465

1667

}

1466

1668

1475

1677

if(sb == NULL){

1476

1678

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

1477

1679

avahi_strerror(avahi_server_errno(mc.server)));

1478

exitcode = EXIT_FAILURE;

1680

exitcode = EX_UNAVAILABLE;

1479

1681

goto end;

1480

1682

}

1481

1683

1530

1732

if(ret == -1){

1531

1733

perror("ioctl SIOCGIFFLAGS");

1532

1734

} else if(network.ifr_flags & IFF_UP) {

1533

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

1735

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

1534

1736

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

1535

1737

if(ret == -1){

1536

perror("ioctl SIOCSIFFLAGS");

1738

perror("ioctl SIOCSIFFLAGS -IFF_UP");

1537

1739

}

1538

1740

}

1539

1741

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