/mandos/release : revision 269.1.1

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Viewing changes to plugins.d/mandos-client.c

Committer: teddy at bsnet
Date: 2010-08-10 19:08:24 UTC
mto: (237.2.182 mandos-local)
mto: This revision was merged to the branch mainline in revision 270.
Revision ID: teddy@fukt.bsnet.se-20100810190824-5yquozxy4kh6py3f

* plugins.d/mandos-client.c: An empty interface name now means to
                             autodetect an interface; to specify no
                             particular interface, use "none".
  (sys_class_net): New global variable for the "/sys/class/net" path.
  (good_interface): New function to determine the suitability of an
                    interface.  Used by a scandir() call in main().
  (main): Changed default value for "interface" to the empty string.
          Moved "connect_to" to be a global variable.  Only take down
          and up interface if its name is not "none".
* plugins.d/mandos-client.xml (OPTIONS): Update documentation for the
                                         "--interface" option.

Show diffs side-by-side

added added

removed removed

plugins.d/mandos-client.c

stdout, ferror(), remove() */

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

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

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

strtof(), abort() */

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

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

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

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

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

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

sigaction(), SIGTERM, sig_atomic_t,

raise() */

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

EX_NOHOST, EX_IOERR, EX_PROTOCOL */

#ifdef __linux__

#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>";

128

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

129

char *connect_to = NULL;

130

131

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

132

typedef struct {

554

gnutls_session_t session;

555

int pf; /* Protocol family */

556

557

errno = 0;

558

559

557

if(quit_now){

560

errno = EINTR;

561

558

return -1;

562

559

}

563

560

570

567

break;

571

568

default:

572

569

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

573

errno = EINVAL;

574

570

return -1;

575

571

}

576

572

586

582

587

583

tcp_sd = socket(pf, SOCK_STREAM, 0);

588

584

if(tcp_sd < 0){

589

int e = errno;

590

585

perror("socket");

591

errno = e;

592

586

goto mandos_end;

593

587

}

594

588

595

589

if(quit_now){

596

errno = EINTR;

597

590

goto mandos_end;

598

591

}

599

592

606

599

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

607

600

}

608

601

if(ret < 0 ){

609

int e = errno;

610

602

perror("inet_pton");

611

errno = e;

612

603

goto mandos_end;

613

604

}

614

605

if(ret == 0){

615

int e = errno;

616

606

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

617

errno = e;

618

607

goto mandos_end;

619

608

}

620

609

if(af == AF_INET6){

628

617

if(if_index == AVAHI_IF_UNSPEC){

629

618

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

630

619

" without a network interface\n");

631

errno = EINVAL;

632

620

goto mandos_end;

633

621

}

634

622

/* Set the network interface number as scope */

641

629

}

642

630

643

631

if(quit_now){

644

errno = EINTR;

645

632

goto mandos_end;

646

633

}

647

634

678

665

}

679

666

680

667

if(quit_now){

681

errno = EINTR;

682

668

goto mandos_end;

683

669

}

684

670

688

674

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

689

675

}

690

676

if(ret < 0){

691

int e = errno;

692

677

perror("connect");

693

errno = e;

694

678

goto mandos_end;

695

679

}

696

680

697

681

if(quit_now){

698

errno = EINTR;

699

682

goto mandos_end;

700

683

}

701

684

706

689

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

707

690

out_size - written));

708

691

if(ret == -1){

709

int e = errno;

710

692

perror("write");

711

errno = e;

712

693

goto mandos_end;

713

694

}

714

695

written += (size_t)ret;

724

705

}

725

706

726

707

if(quit_now){

727

errno = EINTR;

728

708

goto mandos_end;

729

709

}

730

710

}

734

714

}

735

715

736

716

if(quit_now){

737

errno = EINTR;

738

717

goto mandos_end;

739

718

}

740

719

741

720

gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);

742

721

743

722

if(quit_now){

744

errno = EINTR;

745

723

goto mandos_end;

746

724

}

747

725

748

726

do {

749

727

ret = gnutls_handshake(session);

750

728

if(quit_now){

751

errno = EINTR;

752

729

goto mandos_end;

753

730

}

754

731

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

758

735

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

759

736

gnutls_perror(ret);

760

737

}

761

errno = EPROTO;

762

738

goto mandos_end;

763

739

}

764

740

772

748

while(true){

773

749

774

750

if(quit_now){

775

errno = EINTR;

776

751

goto mandos_end;

777

752

}

778

753

779

754

buffer_capacity = incbuffer(&buffer, buffer_length,

780

755

buffer_capacity);

781

756

if(buffer_capacity == 0){

782

int e = errno;

783

757

perror("incbuffer");

784

errno = e;

785

758

goto mandos_end;

786

759

}

787

760

788

761

if(quit_now){

789

errno = EINTR;

790

762

goto mandos_end;

791

763

}

792

764

805

777

ret = gnutls_handshake(session);

806

778

807

779

if(quit_now){

808

errno = EINTR;

809

780

goto mandos_end;

810

781

}

811

782

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

812

783

if(ret < 0){

813

784

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

814

785

gnutls_perror(ret);

815

errno = EPROTO;

816

786

goto mandos_end;

817

787

}

818

788

break;

820

790

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

821

791

" encrypted session with Mandos server\n");

822

792

gnutls_bye(session, GNUTLS_SHUT_RDWR);

823

errno = EIO;

824

793

goto mandos_end;

825

794

}

826

795

} else {

833

802

}

834

803

835

804

if(quit_now){

836

errno = EINTR;

837

805

goto mandos_end;

838

806

}

839

807

840

808

do {

841

809

ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);

842

810

if(quit_now){

843

errno = EINTR;

844

811

goto mandos_end;

845

812

}

846

813

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

855

822

written = 0;

856

823

while(written < (size_t) decrypted_buffer_size){

857

824

if(quit_now){

858

errno = EINTR;

859

825

goto mandos_end;

860

826

}

861

827

863

829

(size_t)decrypted_buffer_size - written,

864

830

stdout);

865

831

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

866

int e = errno;

867

832

if(debug){

868

833

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

869

834

strerror(errno));

870

835

}

871

errno = e;

872

836

goto mandos_end;

873

837

}

874

838

written += (size_t)ret;

880

844

/* Shutdown procedure */

881

845

882

846

mandos_end:

883

{

884

int e = errno;

885

free(decrypted_buffer);

886

free(buffer);

887

if(tcp_sd >= 0){

888

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

889

}

890

if(ret == -1){

891

if(e == 0){

892

e = errno;

893

}

894

perror("close");

895

}

896

gnutls_deinit(session);

897

if(quit_now){

898

e = EINTR;

899

retval = -1;

900

}

901

errno = e;

847

free(decrypted_buffer);

848

free(buffer);

849

if(tcp_sd >= 0){

850

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

851

}

852

if(ret == -1){

853

perror("close");

854

}

855

gnutls_deinit(session);

856

if(quit_now){

857

retval = -1;

902

858

}

903

859

return retval;

904

860

}

1020

976

errno = old_errno;

1021

977

}

1022

978

979

980

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

981

* corresponds to an acceptable network device.

982

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

983

984

int good_interface(const struct dirent *if_entry){

985

ssize_t ssret;

986

char *flagname = NULL;

987

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

988

if_entry->d_name);

989

if(ret < 0){

990

perror("asprintf");

991

return 0;

992

}

993

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

994

return 0;

995

}

996

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

997

if(flags_fd == -1){

998

perror("open");

999

return 0;

1000

}

1001

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

1002

/* read line from flags_fd */

1003

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

1004

char *flagstring = malloc((size_t)to_read);

1005

if(flagstring == NULL){

1006

perror("malloc");

1007

close(flags_fd);

1008

return 0;

1009

}

1010

while(to_read > 0){

1011

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

1012

(size_t)to_read));

1013

if(ssret == -1){

1014

perror("read");

1015

free(flagstring);

1016

close(flags_fd);

1017

return 0;

1018

}

1019

to_read -= ssret;

1020

if(ssret == 0){

1021

break;

1022

}

1023

}

1024

close(flags_fd);

1025

intmax_t tmpmax;

1026

char *tmp;

1027

errno = 0;

1028

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

1029

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

1030

and not (isspace(*tmp)))

1031

or tmpmax != (ifreq_flags)tmpmax){

1032

free(flagstring);

1033

return 0;

1034

}

1035

free(flagstring);

1036

ifreq_flags flags = (ifreq_flags)tmpmax;

1037

/* Reject the loopback device */

1038

if(flags & IFF_LOOPBACK){

1039

return 0;

1040

}

1041

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

1042

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

1043

return 1;

1044

}

1045

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

1046

if(not (flags & IFF_BROADCAST)){

1047

return 0;

1048

}

1049

/* Accept this device */

1050

return 1;

1051

}

1052

1023

1053

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

1024

1054

AvahiSServiceBrowser *sb = NULL;

1025

1055

int error;

1027

1057

intmax_t tmpmax;

1028

1058

char *tmp;

1029

1059

int exitcode = EXIT_SUCCESS;

1030

const char *interface = "eth0";

1060

const char *interface = "";

1031

1061

struct ifreq network;

1032

1062

int sd = -1;

1033

1063

bool take_down_interface = false;

1034

1064

uid_t uid;

1035

1065

gid_t gid;

1036

char *connect_to = NULL;

1037

1066

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

1038

1067

bool tempdir_created = false;

1039

1068

AvahiIfIndex if_index = AVAHI_IF_UNSPEC;

1102

1131

.arg = "SECONDS",

1103

1132

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

1104

1133

.group = 2 },

1105

1106

* These reproduce what we would get without ARGP_NO_HELP

1107

1108

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

1109

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

1110

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

1111

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

1112

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

1113

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

1114

1134

{ .name = NULL }

1115

1135

};

1116

1136

1117

1137

error_t parse_opt(int key, char *arg,

1118

1138

struct argp_state *state){

1119

errno = 0;

1120

1139

switch(key){

1121

1140

case 128: /* --debug */

1122

1141

debug = true;

1138

1157

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

1139

1158

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

1140

1159

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

1141

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

1160

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

1161

exit(EXIT_FAILURE);

1142

1162

}

1143

1163

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

1144

1164

break;

1149

1169

errno = 0;

1150

1170

delay = strtof(arg, &tmp);

1151

1171

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

1152

argp_error(state, "Bad delay");

1172

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

1173

exit(EXIT_FAILURE);

1153

1174

}

1154

1175

break;

1155

1156

* These reproduce what we would get without ARGP_NO_HELP

1157

1158

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

1159

argp_state_help(state, state->out_stream,

1160

(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)

1161

& ~(unsigned int)ARGP_HELP_EXIT_OK);

1162

case -3: /* --usage */

1163

argp_state_help(state, state->out_stream,

1164

ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);

1165

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

1166

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

1167

exit(argp_err_exit_status);

1176

case ARGP_KEY_ARG:

1177

argp_usage(state);

1178

case ARGP_KEY_END:

1168

1179

break;

1169

1180

default:

1170

1181

return ARGP_ERR_UNKNOWN;

1171

1182

}

1172

return errno;

1183

return 0;

1173

1184

}

1174

1185

1175

1186

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

1176

1187

.args_doc = "",

1177

1188

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

1178

1189

" passwords from a Mandos server" };

1179

ret = argp_parse(&argp, argc, argv,

1180

ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);

1181

switch(ret){

1182

case 0:

1183

break;

1184

case ENOMEM:

1185

default:

1186

errno = ret;

1187

perror("argp_parse");

1188

exitcode = EX_OSERR;

1189

goto end;

1190

case EINVAL:

1191

exitcode = EX_USAGE;

1190

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

1191

if(ret == ARGP_ERR_UNKNOWN){

1192

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

1193

exitcode = EXIT_FAILURE;

1192

1194

goto end;

1193

1195

}

1194

1196

}

1196

1198

if(not debug){

1197

1199

avahi_set_log_function(empty_log);

1198

1200

}

1201

1202

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

1203

struct dirent **direntries;

1204

ret = scandir(sys_class_net, &direntries, good_interface,

1205

alphasort);

1206

if(ret >= 1){

1207

/* Pick the first good interface */

1208

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

1209

if(interface == NULL){

1210

perror("malloc");

1211

free(direntries);

1212

exitcode = EXIT_FAILURE;

1213

goto end;

1214

}

1215

free(direntries);

1216

} else {

1217

free(direntries);

1218

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

1219

exitcode = EXIT_FAILURE;

1220

goto end;

1221

}

1222

}

1199

1223

1200

1224

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

1201

1225

from the signal handler */

1204

1228

mc.simple_poll = avahi_simple_poll_new();

1205

1229

if(mc.simple_poll == NULL){

1206

1230

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

1207

exitcode = EX_UNAVAILABLE;

1231

exitcode = EXIT_FAILURE;

1208

1232

goto end;

1209

1233

}

1210

1234

1212

1236

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

1213

1237

if(ret == -1){

1214

1238

perror("sigaddset");

1215

exitcode = EX_OSERR;

1239

exitcode = EXIT_FAILURE;

1216

1240

goto end;

1217

1241

}

1218

1242

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

1219

1243

if(ret == -1){

1220

1244

perror("sigaddset");

1221

exitcode = EX_OSERR;

1245

exitcode = EXIT_FAILURE;

1222

1246

goto end;

1223

1247

}

1224

1248

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

1225

1249

if(ret == -1){

1226

1250

perror("sigaddset");

1227

exitcode = EX_OSERR;

1251

exitcode = EXIT_FAILURE;

1228

1252

goto end;

1229

1253

}

1230

1254

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

1234

1258

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

1235

1259

if(ret == -1){

1236

1260

perror("sigaction");

1237

return EX_OSERR;

1261

return EXIT_FAILURE;

1238

1262

}

1239

1263

if(old_sigterm_action.sa_handler != SIG_IGN){

1240

1264

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

1241

1265

if(ret == -1){

1242

1266

perror("sigaction");

1243

exitcode = EX_OSERR;

1267

exitcode = EXIT_FAILURE;

1244

1268

goto end;

1245

1269

}

1246

1270

}

1247

1271

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

1248

1272

if(ret == -1){

1249

1273

perror("sigaction");

1250

return EX_OSERR;

1274

return EXIT_FAILURE;

1251

1275

}

1252

1276

if(old_sigterm_action.sa_handler != SIG_IGN){

1253

1277

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

1254

1278

if(ret == -1){

1255

1279

perror("sigaction");

1256

exitcode = EX_OSERR;

1280

exitcode = EXIT_FAILURE;

1257

1281

goto end;

1258

1282

}

1259

1283

}

1260

1284

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

1261

1285

if(ret == -1){

1262

1286

perror("sigaction");

1263

return EX_OSERR;

1287

return EXIT_FAILURE;

1264

1288

}

1265

1289

if(old_sigterm_action.sa_handler != SIG_IGN){

1266

1290

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

1267

1291

if(ret == -1){

1268

1292

perror("sigaction");

1269

exitcode = EX_OSERR;

1293

exitcode = EXIT_FAILURE;

1270

1294

goto end;

1271

1295

}

1272

1296

}

1273

1297

1274

1298

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

1275

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

1299

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

1276

1300

if_index = (AvahiIfIndex) if_nametoindex(interface);

1277

1301

if(if_index == 0){

1278

1302

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

1279

exitcode = EX_UNAVAILABLE;

1303

exitcode = EXIT_FAILURE;

1280

1304

goto end;

1281

1305

}

1282

1306

1293

1317

1294

1318

#ifdef __linux__

1295

1319

/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO

1296

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

1320

messages to mess up the prompt */

1297

1321

ret = klogctl(8, NULL, 5);

1298

1322

bool restore_loglevel = true;

1299

1323

if(ret == -1){

1305

1329

sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);

1306

1330

if(sd < 0){

1307

1331

perror("socket");

1308

exitcode = EX_OSERR;

1332

exitcode = EXIT_FAILURE;

1309

1333

#ifdef __linux__

1310

1334

if(restore_loglevel){

1311

1335

ret = klogctl(7, NULL, 0);

1334

1358

}

1335

1359

}

1336

1360

#endif /* __linux__ */

1337

exitcode = EX_OSERR;

1361

exitcode = EXIT_FAILURE;

1338

1362

/* Lower privileges */

1339

1363

errno = 0;

1340

1364

ret = seteuid(uid);

1350

1374

if(ret == -1){

1351

1375

take_down_interface = false;

1352

1376

perror("ioctl SIOCSIFFLAGS");

1353

exitcode = EX_OSERR;

1377

exitcode = EXIT_FAILURE;

1354

1378

#ifdef __linux__

1355

1379

if(restore_loglevel){

1356

1380

ret = klogctl(7, NULL, 0);

1422

1446

ret = init_gnutls_global(pubkey, seckey);

1423

1447

if(ret == -1){

1424

1448

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

1425

exitcode = EX_UNAVAILABLE;

1449

exitcode = EXIT_FAILURE;

1426

1450

goto end;

1427

1451

} else {

1428

1452

gnutls_initialized = true;

1445

1469

1446

1470

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

1447

1471

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

1448

exitcode = EX_UNAVAILABLE;

1472

exitcode = EXIT_FAILURE;

1449

1473

goto end;

1450

1474

} else {

1451

1475

gpgme_initialized = true;

1461

1485

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

1462

1486

if(address == NULL){

1463

1487

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

1464

exitcode = EX_USAGE;

1488

exitcode = EXIT_FAILURE;

1465

1489

goto end;

1466

1490

}

1467

1491

1475

1499

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

1476

1500

or tmpmax != (uint16_t)tmpmax){

1477

1501

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

1478

exitcode = EX_USAGE;

1502

exitcode = EXIT_FAILURE;

1479

1503

goto end;

1480

1504

}

1481

1505

1500

1524

1501

1525

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

1502

1526

if(ret < 0){

1503

switch(errno){

1504

case ENETUNREACH:

1505

case EHOSTDOWN:

1506

case EHOSTUNREACH:

1507

exitcode = EX_NOHOST;

1508

break;

1509

case EINVAL:

1510

exitcode = EX_USAGE;

1511

break;

1512

case EIO:

1513

exitcode = EX_IOERR;

1514

break;

1515

case EPROTO:

1516

exitcode = EX_PROTOCOL;

1517

break;

1518

default:

1519

exitcode = EX_OSERR;

1520

break;

1521

}

1527

exitcode = EXIT_FAILURE;

1522

1528

} else {

1523

1529

exitcode = EXIT_SUCCESS;

1524

1530

}

1551

1557

if(mc.server == NULL){

1552

1558

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

1553

1559

avahi_strerror(error));

1554

exitcode = EX_UNAVAILABLE;

1560

exitcode = EXIT_FAILURE;

1555

1561

goto end;

1556

1562

}

1557

1563

1566

1572

if(sb == NULL){

1567

1573

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

1568

1574

avahi_strerror(avahi_server_errno(mc.server)));

1569

exitcode = EX_UNAVAILABLE;

1575

exitcode = EXIT_FAILURE;

1570

1576

goto end;

1571

1577

}

1572

1578

1621

1627

if(ret == -1){

1622

1628

perror("ioctl SIOCGIFFLAGS");

1623

1629

} else if(network.ifr_flags & IFF_UP) {

1624

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

1630

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

1625

1631

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

1626

1632

if(ret == -1){

1627

1633

perror("ioctl SIOCSIFFLAGS");

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