/mandos/trunk : revision 423

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() */

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() */

72

*/

73

#include <unistd.h> /* close(), SEEK_SET, off_t, write(),

74

getuid(), getgid(), seteuid(),

75

setgid() */

75

setgid(), pause() */

76

#include <arpa/inet.h> /* inet_pton(), htons */

77

#include <iso646.h> /* not, or, and */

78

#include <argp.h> /* struct argp_option, error_t, struct

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 {

142

146

.dh_bits = 1024, .priority = "SECURE256"

143

147

":!CTYPE-X.509:+CTYPE-OPENPGP" };

144

148

149

sig_atomic_t quit_now = 0;

150

int signal_received = 0;

151

145

152

/*

146

153

* Make additional room in "buffer" for at least BUFFER_SIZE more

147

154

* bytes. "buffer_capacity" is how much is currently allocated,

476

483

/* GnuTLS session creation */

477

484

do {

478

485

ret = gnutls_init(session, GNUTLS_SERVER);

486

if(quit_now){

487

return -1;

488

}

479

489

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

480

490

if(ret != GNUTLS_E_SUCCESS){

481

491

fprintf(stderr, "Error in GnuTLS session initialization: %s\n",

486

496

const char *err;

487

497

do {

488

498

ret = gnutls_priority_set_direct(*session, mc.priority, &err);

499

if(quit_now){

500

gnutls_deinit(*session);

501

return -1;

502

}

489

503

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

490

504

if(ret != GNUTLS_E_SUCCESS){

491

505

fprintf(stderr, "Syntax error at: %s\n", err);

499

513

do {

500

514

ret = gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE,

501

515

mc.cred);

516

if(quit_now){

517

gnutls_deinit(*session);

518

return -1;

519

}

502

520

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

503

521

if(ret != GNUTLS_E_SUCCESS){

504

522

fprintf(stderr, "Error setting GnuTLS credentials: %s\n",

519

537

static void empty_log(__attribute__((unused)) AvahiLogLevel level,

520

538

__attribute__((unused)) const char *txt){}

521

539

522

sig_atomic_t quit_now = 0;

523

int signal_received = 0;

524

525

540

/* Called when a Mandos server is found */

526

541

static int start_mandos_communication(const char *ip, uint16_t port,

527

542

AvahiIfIndex if_index,

533

548

struct sockaddr_in6 in6;

534

549

} to;

535

550

char *buffer = NULL;

536

char *decrypted_buffer;

551

char *decrypted_buffer = NULL;

537

552

size_t buffer_length = 0;

538

553

size_t buffer_capacity = 0;

539

554

size_t written;

540

int retval = 0;

555

int retval = -1;

541

556

gnutls_session_t session;

542

557

int pf; /* Protocol family */

543

558

559

errno = 0;

560

544

561

if(quit_now){

562

errno = EINTR;

545

563

return -1;

546

564

}

547

565

554

572

break;

555

573

default:

556

574

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

575

errno = EINVAL;

557

576

return -1;

558

577

}

559

578

569

588

570

589

tcp_sd = socket(pf, SOCK_STREAM, 0);

571

590

if(tcp_sd < 0){

591

int e = errno;

572

592

perror("socket");

573

retval = -1;

593

errno = e;

574

594

goto mandos_end;

575

595

}

576

596

577

597

if(quit_now){

598

errno = EINTR;

578

599

goto mandos_end;

579

600

}

580

601

587

608

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

588

609

}

589

610

if(ret < 0 ){

611

int e = errno;

590

612

perror("inet_pton");

591

retval = -1;

613

errno = e;

592

614

goto mandos_end;

593

615

}

594

616

if(ret == 0){

617

int e = errno;

595

618

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

596

retval = -1;

619

errno = e;

597

620

goto mandos_end;

598

621

}

599

622

if(af == AF_INET6){

607

630

if(if_index == AVAHI_IF_UNSPEC){

608

631

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

609

632

" without a network interface\n");

610

retval = -1;

633

errno = EINVAL;

611

634

goto mandos_end;

612

635

}

613

636

/* Set the network interface number as scope */

620

643

}

621

644

622

645

if(quit_now){

646

errno = EINTR;

623

647

goto mandos_end;

624

648

}

625

649

656

680

}

657

681

658

682

if(quit_now){

683

errno = EINTR;

659

684

goto mandos_end;

660

685

}

661

686

665

690

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

666

691

}

667

692

if(ret < 0){

693

int e = errno;

668

694

perror("connect");

669

retval = -1;

695

errno = e;

670

696

goto mandos_end;

671

697

}

672

698

673

699

if(quit_now){

700

errno = EINTR;

674

701

goto mandos_end;

675

702

}

676

703

681

708

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

682

709

out_size - written));

683

710

if(ret == -1){

711

int e = errno;

684

712

perror("write");

685

retval = -1;

713

errno = e;

686

714

goto mandos_end;

687

715

}

688

716

written += (size_t)ret;

698

726

}

699

727

700

728

if(quit_now){

729

errno = EINTR;

701

730

goto mandos_end;

702

731

}

703

732

}

707

736

}

708

737

709

738

if(quit_now){

739

errno = EINTR;

710

740

goto mandos_end;

711

741

}

712

742

713

743

gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);

714

744

715

745

if(quit_now){

746

errno = EINTR;

716

747

goto mandos_end;

717

748

}

718

749

719

750

do {

720

751

ret = gnutls_handshake(session);

721

752

if(quit_now){

753

errno = EINTR;

722

754

goto mandos_end;

723

755

}

724

756

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

728

760

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

729

761

gnutls_perror(ret);

730

762

}

731

retval = -1;

763

errno = EPROTO;

732

764

goto mandos_end;

733

765

}

734

766

742

774

while(true){

743

775

744

776

if(quit_now){

777

errno = EINTR;

745

778

goto mandos_end;

746

779

}

747

780

748

781

buffer_capacity = incbuffer(&buffer, buffer_length,

749

782

buffer_capacity);

750

783

if(buffer_capacity == 0){

784

int e = errno;

751

785

perror("incbuffer");

752

retval = -1;

786

errno = e;

753

787

goto mandos_end;

754

788

}

755

789

756

790

if(quit_now){

791

errno = EINTR;

757

792

goto mandos_end;

758

793

}

759

794

772

807

ret = gnutls_handshake(session);

773

808

774

809

if(quit_now){

810

errno = EINTR;

775

811

goto mandos_end;

776

812

}

777

813

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

778

814

if(ret < 0){

779

815

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

780

816

gnutls_perror(ret);

781

retval = -1;

817

errno = EPROTO;

782

818

goto mandos_end;

783

819

}

784

820

break;

785

821

default:

786

822

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

787

823

" encrypted session with Mandos server\n");

788

retval = -1;

789

824

gnutls_bye(session, GNUTLS_SHUT_RDWR);

825

errno = EIO;

790

826

goto mandos_end;

791

827

}

792

828

} else {

799

835

}

800

836

801

837

if(quit_now){

802

goto mandos_end;

803

}

804

805

gnutls_bye(session, GNUTLS_SHUT_RDWR);

806

807

if(quit_now){

808

goto mandos_end;

809

}

838

errno = EINTR;

839

goto mandos_end;

840

}

841

842

do {

843

ret = gnutls_bye(session, GNUTLS_SHUT_RDWR);

844

if(quit_now){

845

errno = EINTR;

846

goto mandos_end;

847

}

848

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

810

849

811

850

if(buffer_length > 0){

812

851

ssize_t decrypted_buffer_size;

818

857

written = 0;

819

858

while(written < (size_t) decrypted_buffer_size){

820

859

if(quit_now){

860

errno = EINTR;

821

861

goto mandos_end;

822

862

}

823

863

825

865

(size_t)decrypted_buffer_size - written,

826

866

stdout);

827

867

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

868

int e = errno;

828

869

if(debug){

829

870

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

830

871

strerror(errno));

831

872

}

832

retval = -1;

833

break;

873

errno = e;

874

goto mandos_end;

834

875

}

835

876

written += (size_t)ret;

836

877

}

837

free(decrypted_buffer);

838

} else {

839

retval = -1;

878

retval = 0;

840

879

}

841

} else {

842

retval = -1;

843

880

}

844

881

845

882

/* Shutdown procedure */

846

883

847

884

mandos_end:

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;

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;

858

904

}

859

905

return retval;

860

906

}

976

1022

errno = old_errno;

977

1023

}

978

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

979

1120

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

980

1121

AvahiSServiceBrowser *sb = NULL;

981

1122

int error;

983

1124

intmax_t tmpmax;

984

1125

char *tmp;

985

1126

int exitcode = EXIT_SUCCESS;

986

const char *interface = "eth0";

1127

const char *interface = "";

987

1128

struct ifreq network;

988

1129

int sd = -1;

989

1130

bool take_down_interface = false;

990

1131

uid_t uid;

991

1132

gid_t gid;

992

char *connect_to = NULL;

993

1133

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

994

1134

bool tempdir_created = false;

995

1135

AvahiIfIndex if_index = AVAHI_IF_UNSPEC;

1058

1198

.arg = "SECONDS",

1059

1199

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

1060

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 },

1061

1210

{ .name = NULL }

1062

1211

};

1063

1212

1064

1213

error_t parse_opt(int key, char *arg,

1065

1214

struct argp_state *state){

1215

errno = 0;

1066

1216

switch(key){

1067

1217

case 128: /* --debug */

1068

1218

debug = true;

1084

1234

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

1085

1235

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

1086

1236

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

1087

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

1088

exit(EXIT_FAILURE);

1237

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

1089

1238

}

1090

1239

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

1091

1240

break;

1096

1245

errno = 0;

1097

1246

delay = strtof(arg, &tmp);

1098

1247

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

1099

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

1100

exit(EXIT_FAILURE);

1248

argp_error(state, "Bad delay");

1101

1249

}

1102

1250

break;

1103

case ARGP_KEY_ARG:

1104

argp_usage(state);

1105

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);

1106

1264

break;

1107

1265

default:

1108

1266

return ARGP_ERR_UNKNOWN;

1109

1267

}

1110

return 0;

1268

return errno;

1111

1269

}

1112

1270

1113

1271

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

1114

1272

.args_doc = "",

1115

1273

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

1116

1274

" passwords from a Mandos server" };

1117

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

1118

if(ret == ARGP_ERR_UNKNOWN){

1119

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

1120

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;

1121

1288

goto end;

1122

1289

}

1123

1290

}

1125

1292

if(not debug){

1126

1293

avahi_set_log_function(empty_log);

1127

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

}

1128

1320

1129

1321

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

1130

1322

from the signal handler */

1133

1325

mc.simple_poll = avahi_simple_poll_new();

1134

1326

if(mc.simple_poll == NULL){

1135

1327

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

1136

exitcode = EXIT_FAILURE;

1328

exitcode = EX_UNAVAILABLE;

1137

1329

goto end;

1138

1330

}

1139

1331

1141

1333

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

1142

1334

if(ret == -1){

1143

1335

perror("sigaddset");

1144

exitcode = EXIT_FAILURE;

1336

exitcode = EX_OSERR;

1145

1337

goto end;

1146

1338

}

1147

1339

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

1148

1340

if(ret == -1){

1149

1341

perror("sigaddset");

1150

exitcode = EXIT_FAILURE;

1342

exitcode = EX_OSERR;

1151

1343

goto end;

1152

1344

}

1153

1345

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

1154

1346

if(ret == -1){

1155

1347

perror("sigaddset");

1156

exitcode = EXIT_FAILURE;

1348

exitcode = EX_OSERR;

1157

1349

goto end;

1158

1350

}

1159

1351

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

1163

1355

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

1164

1356

if(ret == -1){

1165

1357

perror("sigaction");

1166

return EXIT_FAILURE;

1358

return EX_OSERR;

1167

1359

}

1168

1360

if(old_sigterm_action.sa_handler != SIG_IGN){

1169

1361

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

1170

1362

if(ret == -1){

1171

1363

perror("sigaction");

1172

exitcode = EXIT_FAILURE;

1364

exitcode = EX_OSERR;

1173

1365

goto end;

1174

1366

}

1175

1367

}

1176

1368

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

1177

1369

if(ret == -1){

1178

1370

perror("sigaction");

1179

return EXIT_FAILURE;

1371

return EX_OSERR;

1180

1372

}

1181

1373

if(old_sigterm_action.sa_handler != SIG_IGN){

1182

1374

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

1183

1375

if(ret == -1){

1184

1376

perror("sigaction");

1185

exitcode = EXIT_FAILURE;

1377

exitcode = EX_OSERR;

1186

1378

goto end;

1187

1379

}

1188

1380

}

1189

1381

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

1190

1382

if(ret == -1){

1191

1383

perror("sigaction");

1192

return EXIT_FAILURE;

1384

return EX_OSERR;

1193

1385

}

1194

1386

if(old_sigterm_action.sa_handler != SIG_IGN){

1195

1387

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

1196

1388

if(ret == -1){

1197

1389

perror("sigaction");

1198

exitcode = EXIT_FAILURE;

1390

exitcode = EX_OSERR;

1199

1391

goto end;

1200

1392

}

1201

1393

}

1202

1394

1203

1395

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

1204

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

1396

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

1205

1397

if_index = (AvahiIfIndex) if_nametoindex(interface);

1206

1398

if(if_index == 0){

1207

1399

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

1208

exitcode = EXIT_FAILURE;

1400

exitcode = EX_UNAVAILABLE;

1209

1401

goto end;

1210

1402

}

1211

1403

1222

1414

1223

1415

#ifdef __linux__

1224

1416

/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO

1225

messages to mess up the prompt */

1417

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

1226

1418

ret = klogctl(8, NULL, 5);

1227

1419

bool restore_loglevel = true;

1228

1420

if(ret == -1){

1234

1426

sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);

1235

1427

if(sd < 0){

1236

1428

perror("socket");

1237

exitcode = EXIT_FAILURE;

1429

exitcode = EX_OSERR;

1238

1430

#ifdef __linux__

1239

1431

if(restore_loglevel){

1240

1432

ret = klogctl(7, NULL, 0);

1263

1455

}

1264

1456

}

1265

1457

#endif /* __linux__ */

1266

exitcode = EXIT_FAILURE;

1458

exitcode = EX_OSERR;

1267

1459

/* Lower privileges */

1268

1460

errno = 0;

1269

1461

ret = seteuid(uid);

1278

1470

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

1279

1471

if(ret == -1){

1280

1472

take_down_interface = false;

1281

perror("ioctl SIOCSIFFLAGS");

1282

exitcode = EXIT_FAILURE;

1473

perror("ioctl SIOCSIFFLAGS +IFF_UP");

1474

exitcode = EX_OSERR;

1283

1475

#ifdef __linux__

1284

1476

if(restore_loglevel){

1285

1477

ret = klogctl(7, NULL, 0);

1351

1543

ret = init_gnutls_global(pubkey, seckey);

1352

1544

if(ret == -1){

1353

1545

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

1354

exitcode = EXIT_FAILURE;

1546

exitcode = EX_UNAVAILABLE;

1355

1547

goto end;

1356

1548

} else {

1357

1549

gnutls_initialized = true;

1374

1566

1375

1567

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

1376

1568

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

1377

exitcode = EXIT_FAILURE;

1569

exitcode = EX_UNAVAILABLE;

1378

1570

goto end;

1379

1571

} else {

1380

1572

gpgme_initialized = true;

1390

1582

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

1391

1583

if(address == NULL){

1392

1584

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

1393

exitcode = EXIT_FAILURE;

1585

exitcode = EX_USAGE;

1394

1586

goto end;

1395

1587

}

1396

1588

1404

1596

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

1405

1597

or tmpmax != (uint16_t)tmpmax){

1406

1598

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

1407

exitcode = EXIT_FAILURE;

1599

exitcode = EX_USAGE;

1408

1600

goto end;

1409

1601

}

1410

1602

1429

1621

1430

1622

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

1431

1623

if(ret < 0){

1432

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

}

1433

1643

} else {

1434

1644

exitcode = EXIT_SUCCESS;

1435

1645

}

1462

1672

if(mc.server == NULL){

1463

1673

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

1464

1674

avahi_strerror(error));

1465

exitcode = EXIT_FAILURE;

1675

exitcode = EX_UNAVAILABLE;

1466

1676

goto end;

1467

1677

}

1468

1678

1477

1687

if(sb == NULL){

1478

1688

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

1479

1689

avahi_strerror(avahi_server_errno(mc.server)));

1480

exitcode = EXIT_FAILURE;

1690

exitcode = EX_UNAVAILABLE;

1481

1691

goto end;

1482

1692

}

1483

1693

1532

1742

if(ret == -1){

1533

1743

perror("ioctl SIOCGIFFLAGS");

1534

1744

} else if(network.ifr_flags & IFF_UP) {

1535

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

1745

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

1536

1746

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

1537

1747

if(ret == -1){

1538

perror("ioctl SIOCSIFFLAGS");

1748

perror("ioctl SIOCSIFFLAGS -IFF_UP");

1539

1749

}

1540

1750

}

1541

1751

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

1598

1808

if(quit_now){

1599

1809

sigemptyset(&old_sigterm_action.sa_mask);

1600

1810

old_sigterm_action.sa_handler = SIG_DFL;

1601

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

1811

ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,

1812

&old_sigterm_action,

1813

NULL));

1602

1814

if(ret == -1){

1603

1815

perror("sigaction");

1604

1816

}

1605

raise(signal_received);

1817

do {

1818

ret = raise(signal_received);

1819

} while(ret != 0 and errno == EINTR);

1820

if(ret != 0){

1821

perror("raise");

1822

abort();

1823

}

1824

TEMP_FAILURE_RETRY(pause());

1606

1825

}

1607

1826

1608

1827

return exitcode;