/mandos/trunk : revision 505.2.7

178

va_list ap;

179

va_start (ap, format);

180

181

TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ", program_invocation_short_name));

181

TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",

182

program_invocation_short_name));

182

183

return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));

183

184

}

184

185

262

263

rc = gpgme_data_new_from_fd(&pgp_data, fd);

263

264

if(rc != GPG_ERR_NO_ERROR){

264

265

fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",

265

gpgme_strsource(rc), gpgme_strerror(rc));

266

gpgme_strsource(rc), gpgme_strerror(rc));

266

267

return false;

267

268

}

268

269

270

rc = gpgme_op_import(mc.ctx, pgp_data);

270

271

if(rc != GPG_ERR_NO_ERROR){

271

272

fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",

272

gpgme_strsource(rc), gpgme_strerror(rc));

273

gpgme_strsource(rc), gpgme_strerror(rc));

273

274

return false;

274

275

}

275

276

290

291

rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);

291

292

if(rc != GPG_ERR_NO_ERROR){

292

293

fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",

293

gpgme_strsource(rc), gpgme_strerror(rc));

294

gpgme_strsource(rc), gpgme_strerror(rc));

294

295

return false;

295

296

}

296

297

298

299

rc = gpgme_get_engine_info(&engine_info);

299

300

if(rc != GPG_ERR_NO_ERROR){

300

301

fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",

301

gpgme_strsource(rc), gpgme_strerror(rc));

302

gpgme_strsource(rc), gpgme_strerror(rc));

302

303

return false;

303

304

}

304

305

while(engine_info != NULL){

310

311

engine_info = engine_info->next;

311

312

}

312

313

if(engine_info == NULL){

313

fprintf_plus(stderr, "Could not set GPGME home dir to %s\n", tempdir);

314

fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",

315

tempdir);

314

316

return false;

315

317

}

316

318

320

rc = gpgme_new(&(mc.ctx));

319

321

if(rc != GPG_ERR_NO_ERROR){

320

322

fprintf_plus(stderr, "Mandos plugin mandos-client: "

321

"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),

322

gpgme_strerror(rc));

323

"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),

324

gpgme_strerror(rc));

323

325

return false;

324

326

}

325

327

352

354

0);

353

355

if(rc != GPG_ERR_NO_ERROR){

354

356

fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",

355

gpgme_strsource(rc), gpgme_strerror(rc));

357

gpgme_strsource(rc), gpgme_strerror(rc));

356

358

return -1;

357

359

}

358

360

362

rc = gpgme_data_new(&dh_plain);

361

363

if(rc != GPG_ERR_NO_ERROR){

362

364

fprintf_plus(stderr, "Mandos plugin mandos-client: "

363

"bad gpgme_data_new: %s: %s\n",

364

gpgme_strsource(rc), gpgme_strerror(rc));

365

"bad gpgme_data_new: %s: %s\n",

366

gpgme_strsource(rc), gpgme_strerror(rc));

365

367

gpgme_data_release(dh_crypto);

366

368

return -1;

367

369

}

371

373

rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);

372

374

if(rc != GPG_ERR_NO_ERROR){

373

375

fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",

374

gpgme_strsource(rc), gpgme_strerror(rc));

376

gpgme_strsource(rc), gpgme_strerror(rc));

375

377

plaintext_length = -1;

376

378

if(debug){

377

379

gpgme_decrypt_result_t result;

380

382

fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");

381

383

} else {

382

384

fprintf_plus(stderr, "Unsupported algorithm: %s\n",

383

result->unsupported_algorithm);

385

result->unsupported_algorithm);

384

386

fprintf_plus(stderr, "Wrong key usage: %u\n",

385

result->wrong_key_usage);

387

result->wrong_key_usage);

386

388

if(result->file_name != NULL){

387

389

fprintf_plus(stderr, "File name: %s\n", result->file_name);

388

390

}

390

392

recipient = result->recipients;

391

393

while(recipient != NULL){

392

394

fprintf_plus(stderr, "Public key algorithm: %s\n",

393

gpgme_pubkey_algo_name(recipient->pubkey_algo));

395

gpgme_pubkey_algo_name

396

(recipient->pubkey_algo));

394

397

fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);

395

398

fprintf_plus(stderr, "Secret key available: %s\n",

396

recipient->status == GPG_ERR_NO_SECKEY

397

? "No" : "Yes");

399

recipient->status == GPG_ERR_NO_SECKEY

400

? "No" : "Yes");

398

401

recipient = recipient->next;

399

402

}

400

403

}

481

484

482

485

ret = gnutls_global_init();

483

486

if(ret != GNUTLS_E_SUCCESS){

484

fprintf_plus(stderr, "GnuTLS global_init: %s\n", safer_gnutls_strerror(ret));

487

fprintf_plus(stderr, "GnuTLS global_init: %s\n",

488

safer_gnutls_strerror(ret));

485

489

return -1;

486

490

}

487

491

496

500

/* OpenPGP credentials */

497

501

ret = gnutls_certificate_allocate_credentials(&mc.cred);

498

502

if(ret != GNUTLS_E_SUCCESS){

499

fprintf_plus(stderr, "GnuTLS memory error: %s\n", safer_gnutls_strerror(ret));

503

fprintf_plus(stderr, "GnuTLS memory error: %s\n",

504

safer_gnutls_strerror(ret));

500

505

gnutls_global_deinit();

501

506

return -1;

502

507

}

503

508

504

509

if(debug){

505

510

fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"

506

" secret key %s as GnuTLS credentials\n", pubkeyfilename,

507

seckeyfilename);

511

" secret key %s as GnuTLS credentials\n",

512

pubkeyfilename,

513

seckeyfilename);

508

514

}

509

515

510

516

ret = gnutls_certificate_set_openpgp_key_file

514

520

fprintf_plus(stderr,

515

521

"Error[%d] while reading the OpenPGP key pair ('%s',"

516

522

" '%s')\n", ret, pubkeyfilename, seckeyfilename);

517

fprintf_plus(stderr, "The GnuTLS error is: %s\n", safer_gnutls_strerror(ret));

523

fprintf_plus(stderr, "The GnuTLS error is: %s\n",

524

safer_gnutls_strerror(ret));

518

525

goto globalfail;

519

526

}

520

527

521

528

/* GnuTLS server initialization */

522

529

ret = gnutls_dh_params_init(&mc.dh_params);

523

530

if(ret != GNUTLS_E_SUCCESS){

524

fprintf_plus(stderr, "Error in GnuTLS DH parameter initialization:"

525

" %s\n", safer_gnutls_strerror(ret));

531

fprintf_plus(stderr, "Error in GnuTLS DH parameter"

532

" initialization: %s\n",

533

safer_gnutls_strerror(ret));

526

534

goto globalfail;

527

535

}

528

536

ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);

529

537

if(ret != GNUTLS_E_SUCCESS){

530

538

fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",

531

safer_gnutls_strerror(ret));

539

safer_gnutls_strerror(ret));

532

540

goto globalfail;

533

541

}

534

542

554

562

}

555

563

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

556

564

if(ret != GNUTLS_E_SUCCESS){

557

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

558

safer_gnutls_strerror(ret));

565

fprintf_plus(stderr,

566

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

567

safer_gnutls_strerror(ret));

559

568

}

560

569

561

570

{

569

578

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

570

579

if(ret != GNUTLS_E_SUCCESS){

571

580

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

572

fprintf_plus(stderr, "GnuTLS error: %s\n", safer_gnutls_strerror(ret));

581

fprintf_plus(stderr, "GnuTLS error: %s\n",

582

safer_gnutls_strerror(ret));

573

583

gnutls_deinit(*session);

574

584

return -1;

575

585

}

585

595

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

586

596

if(ret != GNUTLS_E_SUCCESS){

587

597

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

588

safer_gnutls_strerror(ret));

598

safer_gnutls_strerror(ret));

589

599

gnutls_deinit(*session);

590

600

return -1;

591

601

}

647

657

}

648

658

649

659

if(debug){

650

fprintf_plus(stderr, "Setting up a TCP connection to %s, port %" PRIu16

651

"\n", ip, port);

660

fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"

661

PRIu16 "\n", ip, port);

652

662

}

653

663

654

664

tcp_sd = socket(pf, SOCK_STREAM, 0);

693

703

(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and

694

704

-Wunreachable-code*/

695

705

if(if_index == AVAHI_IF_UNSPEC){

696

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

697

" without a network interface\n");

706

fprintf_plus(stderr, "An IPv6 link-local address is"

707

" incomplete without a network interface\n");

698

708

errno = EINVAL;

699

709

goto mandos_end;

700

710

}

718

728

if(if_indextoname((unsigned int)if_index, interface) == NULL){

719

729

perror_plus("if_indextoname");

720

730

} else {

721

fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",

722

ip, interface, port);

731

fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16

732

"\n", ip, interface, port);

723

733

}

724

734

} else {

725

fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n", ip, port);

735

fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",

736

ip, port);

726

737

}

727

738

char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?

728

739

INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";

834

845

/* Read OpenPGP packet that contains the wanted password */

835

846

836

847

if(debug){

837

fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from %s\n", ip);

848

fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"

849

" %s\n", ip);

838

850

}

839

851

840

852

while(true){

878

890

}

879

891

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

880

892

if(ret < 0){

881

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

893

fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "

894

"***\n");

882

895

gnutls_perror(ret);

883

896

errno = EPROTO;

884

897

goto mandos_end;

886

899

break;

887

900

default:

888

901

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

889

" encrypted session with Mandos server\n");

902

" encrypted session with Mandos server\n");

890

903

gnutls_bye(session, GNUTLS_SHUT_RDWR);

891

904

errno = EIO;

892

905

goto mandos_end;

933

946

int e = errno;

934

947

if(debug){

935

948

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

936

strerror(errno));

949

strerror(errno));

937

950

}

938

951

errno = e;

939

952

goto mandos_end;

996

1009

switch(event){

997

1010

default:

998

1011

case AVAHI_RESOLVER_FAILURE:

999

fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service '%s'"

1000

" of type '%s' in domain '%s': %s\n", name, type, domain,

1001

avahi_strerror(avahi_server_errno(mc.server)));

1012

fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "

1013

"'%s' of type '%s' in domain '%s': %s\n", name, type,

1014

domain,

1015

avahi_strerror(avahi_server_errno(mc.server)));

1002

1016

break;

1003

1017

1004

1018

case AVAHI_RESOLVER_FOUND:

1007

1021

avahi_address_snprint(ip, sizeof(ip), address);

1008

1022

if(debug){

1009

1023

fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"

1010

PRIdMAX ") on port %" PRIu16 "\n", name, host_name,

1011

ip, (intmax_t)interface, port);

1024

PRIdMAX ") on port %" PRIu16 "\n", name,

1025

host_name, ip, (intmax_t)interface, port);

1012

1026

}

1013

1027

int ret = start_mandos_communication(ip, port, interface,

1014

1028

avahi_proto_to_af(proto));

1047

1061

case AVAHI_BROWSER_FAILURE:

1048

1062

1049

1063

fprintf_plus(stderr, "(Avahi browser) %s\n",

1050

avahi_strerror(avahi_server_errno(mc.server)));

1064

avahi_strerror(avahi_server_errno(mc.server)));

1051

1065

avahi_simple_poll_quit(mc.simple_poll);

1052

1066

return;

1053

1067

1060

1074

if(avahi_s_service_resolver_new(mc.server, interface, protocol,

1061

1075

name, type, domain, protocol, 0,

1062

1076

resolve_callback, NULL) == NULL)

1063

fprintf_plus(stderr, "Avahi: Failed to resolve service '%s': %s\n",

1064

name, avahi_strerror(avahi_server_errno(mc.server)));

1077

fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"

1078

" %s\n", name,

1079

avahi_strerror(avahi_server_errno(mc.server)));

1065

1080

break;

1066

1081

1067

1082

case AVAHI_BROWSER_REMOVE:

1070

1085

case AVAHI_BROWSER_ALL_FOR_NOW:

1071

1086

case AVAHI_BROWSER_CACHE_EXHAUSTED:

1072

1087

if(debug){

1073

fprintf_plus(stderr, "No Mandos server found, still searching...\n");

1088

fprintf_plus(stderr, "No Mandos server found, still"

1089

" searching...\n");

1074

1090

}

1075

1091

break;

1076

1092

}

1115

1131

/* Reject the loopback device */

1116

1132

if(ifr->ifr_flags & IFF_LOOPBACK){

1117

1133

if(debug){

1118

fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n", ifname);

1134

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

1135

ifname);

1119

1136

}

1120

1137

return false;

1121

1138

}

1122

1139

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

1123

1140

if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){

1124

1141

if(debug){

1125

fprintf_plus(stderr, "Accepting point-to-point interface \"%s\"\n", ifname);

1142

fprintf_plus(stderr, "Accepting point-to-point interface"

1143

" \"%s\"\n", ifname);

1126

1144

}

1127

1145

return true;

1128

1146

}

1129

1147

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

1130

1148

if(not (ifr->ifr_flags & IFF_BROADCAST)){

1131

1149

if(debug){

1132

fprintf_plus(stderr, "Rejecting non-broadcast interface \"%s\"\n", ifname);

1150

fprintf_plus(stderr, "Rejecting non-broadcast interface"

1151

" \"%s\"\n", ifname);

1133

1152

}

1134

1153

return false;

1135

1154

}

1136

1155

/* Reject non-ARP interfaces (including dummy interfaces) */

1137

1156

if(ifr->ifr_flags & IFF_NOARP){

1138

1157

if(debug){

1139

fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n", ifname);

1158

fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",

1159

ifname);

1140

1160

}

1141

1161

return false;

1142

1162

}

1161

1181

struct ifreq ifr;

1162

1182

if(not get_flags(if_entry->d_name, &ifr)){

1163

1183

if(debug){

1164

fprintf_plus(stderr, "Failed to get flags for interface \"%s\"\n",

1165

if_entry->d_name);

1184

fprintf_plus(stderr, "Failed to get flags for interface "

1185

"\"%s\"\n", if_entry->d_name);

1166

1186

}

1167

1187

return 0;

1168

1188

}

1186

1206

struct ifreq ifr;

1187

1207

if(not get_flags(if_entry->d_name, &ifr)){

1188

1208

if(debug){

1189

fprintf_plus(stderr, "Failed to get flags for interface \"%s\"\n",

1190

if_entry->d_name);

1209

fprintf_plus(stderr, "Failed to get flags for interface "

1210

"\"%s\"\n", if_entry->d_name);

1191

1211

}

1192

1212

return 0;

1193

1213

}

1196

1216

if(not (ifr.ifr_flags & IFF_UP)){

1197

1217

if(debug){

1198

1218

fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",

1199

if_entry->d_name);

1219

if_entry->d_name);

1200

1220

}

1201

1221

return 0;

1202

1222

}

1205

1225

if(not (ifr.ifr_flags & IFF_RUNNING)){

1206

1226

if(debug){

1207

1227

fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",

1208

if_entry->d_name);

1228

if_entry->d_name);

1209

1229

}

1210

1230

return 0;

1211

1231

}

1246

1266

/* Contains non-allowed characters */

1247

1267

if(debug){

1248

1268

fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",

1249

direntry->d_name);

1269

direntry->d_name);

1250

1270

}

1251

1271

return 0;

1252

1272

}

1269

1289

/* Not a regular file */

1270

1290

if(debug){

1271

1291

fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",

1272

direntry->d_name);

1292

direntry->d_name);

1273

1293

}

1274

1294

return 0;

1275

1295

}

1277

1297

/* Not executable */

1278

1298

if(debug){

1279

1299

fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",

1280

direntry->d_name);

1300

direntry->d_name);

1281

1301

}

1282

1302

return 0;

1283

1303

}

1293

1313

while(true){

1294

1314

if(mc.current_server == NULL){

1295

1315

if (debug){

1296

fprintf_plus(stderr, "Wait until first server is found. No timeout!\n");

1316

fprintf_plus(stderr, "Wait until first server is found."

1317

" No timeout!\n");

1297

1318

}

1298

1319

ret = avahi_simple_poll_iterate(s, -1);

1299

1320

} else {

1300

1321

if (debug){

1301

fprintf_plus(stderr, "Check current_server if we should run it,"

1302

" or wait\n");

1322

fprintf_plus(stderr, "Check current_server if we should run"

1323

" it, or wait\n");

1303

1324

}

1304

1325

/* the current time */

1305

1326

ret = clock_gettime(CLOCK_MONOTONIC, &now);

1321

1342

- ((intmax_t)waited_time.tv_nsec / 1000000));

1322

1343

1323

1344

if (debug){

1324

fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n", block_time);

1345

fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",

1346

block_time);

1325

1347

}

1326

1348

1327

1349

if(block_time <= 0){

1354

1376

}

1355

1377

}

1356

1378

1379

bool run_network_hooks(const char *mode, const char *interface,

1380

const float delay){

1381

struct dirent **direntries;

1382

struct dirent *direntry;

1383

int ret;

1384

int numhooks = scandir(hookdir, &direntries, runnable_hook,

1385

alphasort);

1386

if(numhooks == -1){

1387

perror_plus("scandir");

1388

} else {

1389

int devnull = open("/dev/null", O_RDONLY);

1390

for(int i = 0; i < numhooks; i++){

1391

direntry = direntries[0];

1392

char *fullname = NULL;

1393

ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);

1394

if(ret < 0){

1395

perror_plus("asprintf");

1396

continue;

1397

}

1398

pid_t hook_pid = fork();

1399

if(hook_pid == 0){

1400

/* Child */

1401

dup2(devnull, STDIN_FILENO);

1402

close(devnull);

1403

dup2(STDERR_FILENO, STDOUT_FILENO);

1404

ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);

1405

if(ret == -1){

1406

perror_plus("setenv");

1407

return false;

1408

}

1409

ret = setenv("DEVICE", interface, 1);

1410

if(ret == -1){

1411

perror_plus("setenv");

1412

return false;

1413

}

1414

ret = setenv("VERBOSE", debug ? "1" : "0", 1);

1415

if(ret == -1){

1416

perror_plus("setenv");

1417

return false;

1418

}

1419

ret = setenv("MODE", mode, 1);

1420

if(ret == -1){

1421

perror_plus("setenv");

1422

return false;

1423

}

1424

char *delaystring;

1425

ret = asprintf(&delaystring, "%f", delay);

1426

if(ret == -1){

1427

perror_plus("asprintf");

1428

return false;

1429

}

1430

ret = setenv("DELAY", delaystring, 1);

1431

if(ret == -1){

1432

free(delaystring);

1433

perror_plus("setenv");

1434

return false;

1435

}

1436

free(delaystring);

1437

ret = execl(fullname, direntry->d_name, mode, NULL);

1438

perror_plus("execl");

1439

} else {

1440

int status;

1441

if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){

1442

perror_plus("waitpid");

1443

free(fullname);

1444

continue;

1445

}

1446

if(WIFEXITED(status)){

1447

if(WEXITSTATUS(status) != 0){

1448

fprintf_plus(stderr, "Warning: network hook \"%s\" exited"

1449

" with status %d\n", direntry->d_name,

1450

WEXITSTATUS(status));

1451

free(fullname);

1452

continue;

1453

}

1454

} else if(WIFSIGNALED(status)){

1455

fprintf_plus(stderr, "Warning: network hook \"%s\" died by"

1456

" signal %d\n", direntry->d_name,

1457

WTERMSIG(status));

1458

free(fullname);

1459

continue;

1460

} else {

1461

fprintf_plus(stderr, "Warning: network hook \"%s\""

1462

" crashed\n", direntry->d_name);

1463

free(fullname);

1464

continue;

1465

}

1466

}

1467

free(fullname);

1468

if(quit_now){

1469

break;

1470

}

1471

}

1472

close(devnull);

1473

}

1474

return true;

1475

}

1476

1357

1477

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

1358

1478

AvahiSServiceBrowser *sb = NULL;

1359

1479

int error;

1517

1637

argp_state_help(state, state->out_stream,

1518

1638

ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);

1519

1639

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

1520

fprintf_plus(state->out_stream, "Mandos plugin mandos-client: ");

1640

fprintf_plus(state->out_stream,

1641

"Mandos plugin mandos-client: ");

1521

1642

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

1522

1643

exit(argp_err_exit_status);

1523

1644

break;

1569

1690

if(ret == -1){

1570

1691

perror_plus("fstat");

1571

1692

} else {

1572

if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){

1693

if(S_ISREG(st.st_mode)

1694

and st.st_uid == 0 and st.st_gid == 0){

1573

1695

ret = fchown(seckey_fd, uid, gid);

1574

1696

if(ret == -1){

1575

1697

perror_plus("fchown");

1589

1711

if(ret == -1){

1590

1712

perror_plus("fstat");

1591

1713

} else {

1592

if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){

1714

if(S_ISREG(st.st_mode)

1715

and st.st_uid == 0 and st.st_gid == 0){

1593

1716

ret = fchown(pubkey_fd, uid, gid);

1594

1717

if(ret == -1){

1595

1718

perror_plus("fchown");

1608

1731

}

1609

1732

}

1610

1733

1611

/* Find network hooks and run them */

1734

/* Run network hooks */

1612

1735

{

1613

struct dirent **direntries;

1614

struct dirent *direntry;

1615

int numhooks = scandir(hookdir, &direntries, runnable_hook,

1616

alphasort);

1617

if(numhooks == -1){

1618

perror_plus("scandir");

1619

} else {

1620

int devnull = open("/dev/null", O_RDONLY);

1621

for(int i = 0; i < numhooks; i++){

1622

direntry = direntries[0];

1623

char *fullname = NULL;

1624

ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);

1625

if(ret < 0){

1626

perror_plus("asprintf");

1627

continue;

1628

}

1629

pid_t hook_pid = fork();

1630

if(hook_pid == 0){

1631

/* Child */

1632

dup2(devnull, STDIN_FILENO);

1633

close(devnull);

1634

dup2(STDERR_FILENO, STDOUT_FILENO);

1635

ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);

1636

if(ret == -1){

1637

perror_plus("setenv");

1638

exit(1);

1639

}

1640

ret = setenv("DEVICE", interface, 1);

1641

if(ret == -1){

1642

perror_plus("setenv");

1643

exit(1);

1644

}

1645

ret = setenv("VERBOSE", debug ? "1" : "0", 1);

1646

if(ret == -1){

1647

perror_plus("setenv");

1648

exit(1);

1649

}

1650

ret = setenv("MODE", "start", 1);

1651

if(ret == -1){

1652

perror_plus("setenv");

1653

exit(1);

1654

}

1655

char *delaystring;

1656

ret = asprintf(&delaystring, "%f", delay);

1657

if(ret == -1){

1658

perror_plus("asprintf");

1659

exit(1);

1660

}

1661

ret = setenv("DELAY", delaystring, 1);

1662

if(ret == -1){

1663

free(delaystring);

1664

perror_plus("setenv");

1665

exit(1);

1666

}

1667

free(delaystring);

1668

ret = execl(fullname, direntry->d_name, "start", NULL);

1669

perror_plus("execl");

1670

} else {

1671

int status;

1672

if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){

1673

perror_plus("waitpid");

1674

free(fullname);

1675

continue;

1676

}

1677

if(WIFEXITED(status)){

1678

if(WEXITSTATUS(status) != 0){

1679

fprintf_plus(stderr, "Warning: network hook \"%s\" exited"

1680

" with status %d\n", direntry->d_name,

1681

WEXITSTATUS(status));

1682

free(fullname);

1683

continue;

1684

}

1685

} else if(WIFSIGNALED(status)){

1686

fprintf_plus(stderr, "Warning: network hook \"%s\" died by"

1687

" signal %d\n", direntry->d_name,

1688

WTERMSIG(status));

1689

free(fullname);

1690

continue;

1691

} else {

1692

fprintf_plus(stderr, "Warning: network hook \"%s\" crashed\n",

1693

direntry->d_name);

1694

free(fullname);

1695

continue;

1696

}

1697

}

1698

free(fullname);

1699

if(quit_now){

1700

goto end;

1701

}

1702

}

1703

close(devnull);

1736

/* Re-raise priviliges */

1737

errno = 0;

1738

ret = seteuid(0);

1739

if(ret == -1){

1740

perror_plus("seteuid");

1741

}

1742

if(not run_network_hooks("start", interface, delay)){

1743

goto end;

1744

}

1745

/* Lower privileges */

1746

errno = 0;

1747

ret = seteuid(uid);

1748

if(ret == -1){

1749

perror_plus("seteuid");

1704

1750

}

1705

1751

}

1706

1752

1746

1792

srand((unsigned int) time(NULL));

1747

1793

mc.simple_poll = avahi_simple_poll_new();

1748

1794

if(mc.simple_poll == NULL){

1749

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

1795

fprintf_plus(stderr,

1796

"Avahi: Failed to create simple poll object.\n");

1750

1797

exitcode = EX_UNAVAILABLE;

1751

1798

goto end;

1752

1799

}

1944

1991

#endif /* __linux__ */

1945

1992

/* Lower privileges */

1946

1993

errno = 0;

1947

if(take_down_interface){

1948

/* Lower privileges */

1949

ret = seteuid(uid);

1950

if(ret == -1){

1951

perror_plus("seteuid");

1952

}

1953

} else {

1954

/* Lower privileges permanently */

1955

ret = setuid(uid);

1956

if(ret == -1){

1957

perror_plus("setuid");

1958

}

1994

/* Lower privileges */

1995

ret = seteuid(uid);

1996

if(ret == -1){

1997

perror_plus("seteuid");

1959

1998

}

1960

1999

}

1961

2000

2053

2092

break;

2054

2093

}

2055

2094

if(debug){

2056

fprintf_plus(stderr, "Retrying in %d seconds\n", (int)retry_interval);

2095

fprintf_plus(stderr, "Retrying in %d seconds\n",

2096

(int)retry_interval);

2057

2097

}

2058

2098

sleep((int)retry_interval);

2059

2099

}

2090

2130

/* Check if creating the Avahi server object succeeded */

2091

2131

if(mc.server == NULL){

2092

2132

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

2093

avahi_strerror(error));

2133

avahi_strerror(error));

2094

2134

exitcode = EX_UNAVAILABLE;

2095

2135

goto end;

2096

2136

}

2105

2145

NULL, 0, browse_callback, NULL);

2106

2146

if(sb == NULL){

2107

2147

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

2108

avahi_strerror(avahi_server_errno(mc.server)));

2148

avahi_strerror(avahi_server_errno(mc.server)));

2109

2149

exitcode = EX_UNAVAILABLE;

2110

2150

goto end;

2111

2151

}

2124

2164

(int)(retry_interval * 1000));

2125

2165

if(debug){

2126

2166

fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",

2127

(ret == 0) ? "successfully" : "with error");

2167

(ret == 0) ? "successfully" : "with error");

2128

2168

}

2129

2169

2130

2170

end:

2164

2204

}

2165

2205

}

2166

2206

2167

/* XXX run network hooks "stop" here */

2168

2169

/* Take down the network interface */

2170

if(take_down_interface){

2171

/* Re-raise priviliges */

2207

/* Re-raise priviliges */

2208

{

2172

2209

errno = 0;

2173

2210

ret = seteuid(0);

2174

2211

if(ret == -1){

2175

2212

perror_plus("seteuid");

2176

2213

}

2177

if(geteuid() == 0){

2214

/* Run network hooks */

2215

if(not run_network_hooks("stop", interface, delay)){

2216

goto end;

2217

}

2218

2219

/* Take down the network interface */

2220

if(take_down_interface and geteuid() == 0){

2178

2221

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

2179

2222

if(ret == -1){

2180

2223

perror_plus("ioctl SIOCGIFFLAGS");

2189

2232

if(ret == -1){

2190

2233

perror_plus("close");

2191

2234

}

2192

/* Lower privileges permanently */

2193

errno = 0;

2194

ret = setuid(uid);

2195

if(ret == -1){

2196

perror_plus("setuid");

2197

}

2198

2235

}

2199

2236

}

2237

/* Lower privileges permanently */

2238

errno = 0;

2239

ret = setuid(uid);

2240

if(ret == -1){

2241

perror_plus("setuid");

2242

}

2200

2243

2201

2244

/* Removes the GPGME temp directory and all files inside */

2202

2245

if(tempdir_created){

2216

2259

}

2217

2260

ret = remove(fullname);

2218

2261

if(ret == -1){

2219

fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname, strerror(errno));

2262

fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,

2263

strerror(errno));

2220

2264

}

2221

2265

free(fullname);

2222

2266

}