/mandos/trunk : revision 392

9

* "browse_callback", and parts of "main".

10

*

11

* Everything else is

12

13

12

13

14

*

15

* This program is free software: you can redistribute it and/or

16

* modify it under the terms of the GNU General Public License as

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

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

1036

return 0;

1037

}

1038

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

1039

if_entry->d_name);

1040

if(ret < 0){

1041

perror("asprintf");

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

free(flagname);

1048

return 0;

1049

}

1050

free(flagname);

1051

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

1052

/* read line from flags_fd */

1053

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

1054

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

1055

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

1056

if(flagstring == NULL){

1057

perror("malloc");

1058

close(flags_fd);

1059

return 0;

1060

}

1061

while(to_read > 0){

1062

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

1063

(size_t)to_read));

1064

if(ssret == -1){

1065

perror("read");

1066

free(flagstring);

1067

close(flags_fd);

1068

return 0;

1069

}

1070

to_read -= ssret;

1071

if(ssret == 0){

1072

break;

1073

}

1074

}

1075

close(flags_fd);

1076

intmax_t tmpmax;

1077

char *tmp;

1078

errno = 0;

1079

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

1080

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

1081

and not (isspace(*tmp)))

1082

or tmpmax != (ifreq_flags)tmpmax){

1083

if(debug){

1084

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

1085

flagstring, if_entry->d_name);

1086

}

1087

free(flagstring);

1088

return 0;

1089

}

1090

free(flagstring);

1091

ifreq_flags flags = (ifreq_flags)tmpmax;

1092

/* Reject the loopback device */

1093

if(flags & IFF_LOOPBACK){

1094

if(debug){

1095

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

1096

if_entry->d_name);

1097

}

1098

return 0;

1099

}

1100

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

1101

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

1102

if(debug){

1103

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

1104

if_entry->d_name);

1105

}

1106

return 1;

1107

}

1108

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

1109

if(not (flags & IFF_BROADCAST)){

1110

if(debug){

1111

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

1112

if_entry->d_name);

1113

}

1114

return 0;

1115

}

1116

/* Accept this device */

1117

if(debug){

1118

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

1119

if_entry->d_name);

1120

}

1121

return 1;

1122

}

1123

1124

977

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

1125

978

AvahiSServiceBrowser *sb = NULL;

1126

979

int error;

1128

981

intmax_t tmpmax;

1129

982

char *tmp;

1130

983

int exitcode = EXIT_SUCCESS;

1131

const char *interface = "";

984

const char *interface = "eth0";

1132

985

struct ifreq network;

1133

986

int sd = -1;

1134

987

bool take_down_interface = false;

1135

988

uid_t uid;

1136

989

gid_t gid;

990

char *connect_to = NULL;

1137

991

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

1138

992

bool tempdir_created = false;

1139

993

AvahiIfIndex if_index = AVAHI_IF_UNSPEC;

1202

1056

.arg = "SECONDS",

1203

1057

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

1204

1058

.group = 2 },

1205

/*

1206

* These reproduce what we would get without ARGP_NO_HELP

1207

*/

1208

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

1209

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

1210

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

1211

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

1212

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

1213

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

1214

1059

{ .name = NULL }

1215

1060

};

1216

1061

1217

1062

error_t parse_opt(int key, char *arg,

1218

1063

struct argp_state *state){

1219

errno = 0;

1220

1064

switch(key){

1221

1065

case 128: /* --debug */

1222

1066

debug = true;

1238

1082

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

1239

1083

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

1240

1084

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

1241

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

1085

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

1086

exit(EXIT_FAILURE);

1242

1087

}

1243

1088

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

1244

1089

break;

1249

1094

errno = 0;

1250

1095

delay = strtof(arg, &tmp);

1251

1096

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

1252

argp_error(state, "Bad delay");

1097

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

1098

exit(EXIT_FAILURE);

1253

1099

}

1254

1100

break;

1255

/*

1256

* These reproduce what we would get without ARGP_NO_HELP

1257

*/

1258

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

1259

argp_state_help(state, state->out_stream,

1260

(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)

1261

& ~(unsigned int)ARGP_HELP_EXIT_OK);

1262

case -3: /* --usage */

1263

argp_state_help(state, state->out_stream,

1264

ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);

1265

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

1266

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

1267

exit(argp_err_exit_status);

1101

case ARGP_KEY_ARG:

1102

argp_usage(state);

1103

case ARGP_KEY_END:

1268

1104

break;

1269

1105

default:

1270

1106

return ARGP_ERR_UNKNOWN;

1271

1107

}

1272

return errno;

1108

return 0;

1273

1109

}

1274

1110

1275

1111

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

1276

1112

.args_doc = "",

1277

1113

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

1278

1114

" passwords from a Mandos server" };

1279

ret = argp_parse(&argp, argc, argv,

1280

ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);

1281

switch(ret){

1282

case 0:

1283

break;

1284

case ENOMEM:

1285

default:

1286

errno = ret;

1287

perror("argp_parse");

1288

exitcode = EX_OSERR;

1289

goto end;

1290

case EINVAL:

1291

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;

1292

1119

goto end;

1293

1120

}

1294

1121

}

1296

1123

if(not debug){

1297

1124

avahi_set_log_function(empty_log);

1298

1125

}

1299

1300

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

1301

struct dirent **direntries;

1302

ret = scandir(sys_class_net, &direntries, good_interface,

1303

alphasort);

1304

if(ret >= 1){

1305

/* Pick the first good interface */

1306

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

1307

if(debug){

1308

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

1309

}

1310

if(interface == NULL){

1311

perror("malloc");

1312

free(direntries);

1313

exitcode = EXIT_FAILURE;

1314

goto end;

1315

}

1316

free(direntries);

1317

} else {

1318

free(direntries);

1319

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

1320

exitcode = EXIT_FAILURE;

1321

goto end;

1322

}

1323

}

1324

1126

1325

1127

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

1326

1128

from the signal handler */

1329

1131

mc.simple_poll = avahi_simple_poll_new();

1330

1132

if(mc.simple_poll == NULL){

1331

1133

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

1332

exitcode = EX_UNAVAILABLE;

1134

exitcode = EXIT_FAILURE;

1333

1135

goto end;

1334

1136

}

1335

1137

1337

1139

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

1338

1140

if(ret == -1){

1339

1141

perror("sigaddset");

1340

exitcode = EX_OSERR;

1142

exitcode = EXIT_FAILURE;

1341

1143

goto end;

1342

1144

}

1343

1145

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

1344

1146

if(ret == -1){

1345

1147

perror("sigaddset");

1346

exitcode = EX_OSERR;

1148

exitcode = EXIT_FAILURE;

1347

1149

goto end;

1348

1150

}

1349

1151

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

1350

1152

if(ret == -1){

1351

1153

perror("sigaddset");

1352

exitcode = EX_OSERR;

1154

exitcode = EXIT_FAILURE;

1353

1155

goto end;

1354

1156

}

1355

1157

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

1359

1161

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

1360

1162

if(ret == -1){

1361

1163

perror("sigaction");

1362

return EX_OSERR;

1164

return EXIT_FAILURE;

1363

1165

}

1364

1166

if(old_sigterm_action.sa_handler != SIG_IGN){

1365

1167

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

1366

1168

if(ret == -1){

1367

1169

perror("sigaction");

1368

exitcode = EX_OSERR;

1170

exitcode = EXIT_FAILURE;

1369

1171

goto end;

1370

1172

}

1371

1173

}

1372

1174

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

1373

1175

if(ret == -1){

1374

1176

perror("sigaction");

1375

return EX_OSERR;

1177

return EXIT_FAILURE;

1376

1178

}

1377

1179

if(old_sigterm_action.sa_handler != SIG_IGN){

1378

1180

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

1379

1181

if(ret == -1){

1380

1182

perror("sigaction");

1381

exitcode = EX_OSERR;

1183

exitcode = EXIT_FAILURE;

1382

1184

goto end;

1383

1185

}

1384

1186

}

1385

1187

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

1386

1188

if(ret == -1){

1387

1189

perror("sigaction");

1388

return EX_OSERR;

1190

return EXIT_FAILURE;

1389

1191

}

1390

1192

if(old_sigterm_action.sa_handler != SIG_IGN){

1391

1193

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

1392

1194

if(ret == -1){

1393

1195

perror("sigaction");

1394

exitcode = EX_OSERR;

1196

exitcode = EXIT_FAILURE;

1395

1197

goto end;

1396

1198

}

1397

1199

}

1398

1200

1399

1201

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

1400

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

1202

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

1401

1203

if_index = (AvahiIfIndex) if_nametoindex(interface);

1402

1204

if(if_index == 0){

1403

1205

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

1404

exitcode = EX_UNAVAILABLE;

1206

exitcode = EXIT_FAILURE;

1405

1207

goto end;

1406

1208

}

1407

1209

1418

1220

1419

1221

#ifdef __linux__

1420

1222

/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO

1421

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

1223

messages to mess up the prompt */

1422

1224

ret = klogctl(8, NULL, 5);

1423

1225

bool restore_loglevel = true;

1424

1226

if(ret == -1){

1430

1232

sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);

1431

1233

if(sd < 0){

1432

1234

perror("socket");

1433

exitcode = EX_OSERR;

1235

exitcode = EXIT_FAILURE;

1434

1236

#ifdef __linux__

1435

1237

if(restore_loglevel){

1436

1238

ret = klogctl(7, NULL, 0);

1459

1261

}

1460

1262

}

1461

1263

#endif /* __linux__ */

1462

exitcode = EX_OSERR;

1264

exitcode = EXIT_FAILURE;

1463

1265

/* Lower privileges */

1464

1266

errno = 0;

1465

1267

ret = seteuid(uid);

1474

1276

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

1475

1277

if(ret == -1){

1476

1278

take_down_interface = false;

1477

perror("ioctl SIOCSIFFLAGS +IFF_UP");

1478

exitcode = EX_OSERR;

1279

perror("ioctl SIOCSIFFLAGS");

1280

exitcode = EXIT_FAILURE;

1479

1281

#ifdef __linux__

1480

1282

if(restore_loglevel){

1481

1283

ret = klogctl(7, NULL, 0);

1547

1349

ret = init_gnutls_global(pubkey, seckey);

1548

1350

if(ret == -1){

1549

1351

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

1550

exitcode = EX_UNAVAILABLE;

1352

exitcode = EXIT_FAILURE;

1551

1353

goto end;

1552

1354

} else {

1553

1355

gnutls_initialized = true;

1570

1372

1571

1373

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

1572

1374

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

1573

exitcode = EX_UNAVAILABLE;

1375

exitcode = EXIT_FAILURE;

1574

1376

goto end;

1575

1377

} else {

1576

1378

gpgme_initialized = true;

1586

1388

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

1587

1389

if(address == NULL){

1588

1390

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

1589

exitcode = EX_USAGE;

1391

exitcode = EXIT_FAILURE;

1590

1392

goto end;

1591

1393

}

1592

1394

1600

1402

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

1601

1403

or tmpmax != (uint16_t)tmpmax){

1602

1404

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

1603

exitcode = EX_USAGE;

1405

exitcode = EXIT_FAILURE;

1604

1406

goto end;

1605

1407

}

1606

1408

1622

1424

if(quit_now){

1623

1425

goto end;

1624

1426

}

1625

1626

while(not quit_now){

1627

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

1628

if(quit_now or ret == 0){

1629

break;

1630

}

1631

sleep(15);

1632

};

1633

1634

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 {

1635

1432

exitcode = EXIT_SUCCESS;

1636

1433

}

1637

1638

1434

goto end;

1639

1435

}

1640

1436

1664

1460

if(mc.server == NULL){

1665

1461

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

1666

1462

avahi_strerror(error));

1667

exitcode = EX_UNAVAILABLE;

1463

exitcode = EXIT_FAILURE;

1668

1464

goto end;

1669

1465

}

1670

1466

1679

1475

if(sb == NULL){

1680

1476

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

1681

1477

avahi_strerror(avahi_server_errno(mc.server)));

1682

exitcode = EX_UNAVAILABLE;

1478

exitcode = EXIT_FAILURE;

1683

1479

goto end;

1684

1480

}

1685

1481

1734

1530

if(ret == -1){

1735

1531

perror("ioctl SIOCGIFFLAGS");

1736

1532

} else if(network.ifr_flags & IFF_UP) {

1737

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

1533

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

1738

1534

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

1739

1535

if(ret == -1){

1740

perror("ioctl SIOCSIFFLAGS -IFF_UP");

1536

perror("ioctl SIOCSIFFLAGS");

1741

1537

}

1742

1538

}

1743

1539

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