/mandos/trunk : revision 668

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

183

perror(print_text);

184

}

185

186

__attribute__((format (gnu_printf, 2, 3), nonnull))

186

__attribute__((format (gnu_printf, 2, 3)))

187

int fprintf_plus(FILE *stream, const char *format, ...){

188

va_list ap;

189

va_start (ap, format);

198

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

199

* "buffer_length" is how much is already used.

200

*/

201

__attribute__((nonnull, warn_unused_result))

202

201

size_t incbuffer(char **buffer, size_t buffer_length,

203

202

size_t buffer_capacity){

204

203

if(buffer_length + BUFFER_SIZE > buffer_capacity){

217

216

}

218

217

219

218

/* Add server to set of servers to retry periodically */

220

__attribute__((nonnull, warn_unused_result))

221

219

bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,

222

220

int af, server **current_server){

223

221

int ret;

244

242

new_server->next = new_server;

245

243

new_server->prev = new_server;

246

244

*current_server = new_server;

245

/* Place the new server last in the list */

247

246

} else {

248

/* Place the new server last in the list */

249

247

new_server->next = *current_server;

250

248

new_server->prev = (*current_server)->prev;

251

249

new_server->prev->next = new_server;

257

255

/*

258

256

* Initialize GPGME.

259

257

*/

260

__attribute__((nonnull, warn_unused_result))

261

static bool init_gpgme(const char * const seckey,

262

const char * const pubkey,

263

const char * const tempdir,

264

mandos_context *mc){

258

static bool init_gpgme(const char *seckey, const char *pubkey,

259

const char *tempdir, mandos_context *mc){

265

260

gpgme_error_t rc;

266

261

gpgme_engine_info_t engine_info;

267

262

268

263

/*

269

264

* Helper function to insert pub and seckey to the engine keyring.

270

265

*/

271

bool import_key(const char * const filename){

266

bool import_key(const char *filename){

272

267

int ret;

273

268

int fd;

274

269

gpgme_data_t pgp_data;

355

350

* Decrypt OpenPGP data.

356

351

* Returns -1 on error

357

352

*/

358

__attribute__((nonnull, warn_unused_result))

359

353

static ssize_t pgp_packet_decrypt(const char *cryptotext,

360

354

size_t crypto_size,

361

355

char **plaintext,

481

475

return plaintext_length;

482

476

}

483

477

484

__attribute__((warn_unused_result))

485

static const char *safer_gnutls_strerror(int value){

478

static const char * safer_gnutls_strerror(int value){

486

479

const char *ret = gnutls_strerror(value);

487

480

if(ret == NULL)

488

481

ret = "(unknown)";

490

483

}

491

484

492

485

/* GnuTLS log function callback */

493

__attribute__((nonnull))

494

486

static void debuggnutls(__attribute__((unused)) int level,

495

487

const char* string){

496

488

fprintf_plus(stderr, "GnuTLS: %s", string);

497

489

}

498

490

499

__attribute__((nonnull, warn_unused_result))

500

491

static int init_gnutls_global(const char *pubkeyfilename,

501

492

const char *seckeyfilename,

502

493

mandos_context *mc){

576

567

return -1;

577

568

}

578

569

579

__attribute__((nonnull, warn_unused_result))

580

570

static int init_gnutls_session(gnutls_session_t *session,

581

571

mandos_context *mc){

582

572

int ret;

639

629

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

640

630

641

631

/* Called when a Mandos server is found */

642

__attribute__((nonnull, warn_unused_result))

643

632

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

644

633

AvahiIfIndex if_index,

645

634

int af, mandos_context *mc){

646

635

int ret, tcp_sd = -1;

647

636

ssize_t sret;

648

struct sockaddr_storage to;

637

union {

638

struct sockaddr_in in;

639

struct sockaddr_in6 in6;

640

} to;

649

641

char *buffer = NULL;

650

642

char *decrypted_buffer = NULL;

651

643

size_t buffer_length = 0;

732

724

733

725

memset(&to, 0, sizeof(to));

734

726

if(af == AF_INET6){

735

((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;

736

ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);

727

to.in6.sin6_family = (sa_family_t)af;

728

ret = inet_pton(af, ip, &to.in6.sin6_addr);

737

729

} else { /* IPv4 */

738

((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;

739

ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);

730

to.in.sin_family = (sa_family_t)af;

731

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

740

732

}

741

733

if(ret < 0 ){

742

734

int e = errno;

751

743

goto mandos_end;

752

744

}

753

745

if(af == AF_INET6){

754

((struct sockaddr_in6 *)&to)->sin6_port = htons(port);

755

if(IN6_IS_ADDR_LINKLOCAL

756

(&((struct sockaddr_in6 *)&to)->sin6_addr)){

746

to.in6.sin6_port = htons(port);

747

#ifdef __GNUC__

748

#pragma GCC diagnostic push

749

#pragma GCC diagnostic ignored "-Wstrict-aliasing"

750

#endif

751

if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */

752

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

753

#ifdef __GNUC__

754

#pragma GCC diagnostic pop

755

#endif

757

756

if(if_index == AVAHI_IF_UNSPEC){

758

757

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

759

758

" incomplete without a network interface\n");

761

760

goto mandos_end;

762

761

}

763

762

/* Set the network interface number as scope */

764

((struct sockaddr_in6 *)&to)->sin6_scope_id = (uint32_t)if_index;

763

to.in6.sin6_scope_id = (uint32_t)if_index;

765

764

}

766

765

} else {

767

((struct sockaddr_in *)&to)->sin_port = htons(port);

766

to.in.sin_port = htons(port);

768

767

}

769

768

770

769

if(quit_now){

788

787

char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?

789

788

INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";

790

789

if(af == AF_INET6){

791

ret = getnameinfo((struct sockaddr *)&to,

792

sizeof(struct sockaddr_in6),

790

ret = getnameinfo((struct sockaddr *)&(to.in6), sizeof(to.in6),

793

791

addrstr, sizeof(addrstr), NULL, 0,

794

792

NI_NUMERICHOST);

795

793

} else {

796

ret = getnameinfo((struct sockaddr *)&to,

797

sizeof(struct sockaddr_in),

794

ret = getnameinfo((struct sockaddr *)&(to.in), sizeof(to.in),

798

795

addrstr, sizeof(addrstr), NULL, 0,

799

796

NI_NUMERICHOST);

800

797

}

813

810

}

814

811

815

812

if(af == AF_INET6){

816

ret = connect(tcp_sd, (struct sockaddr *)&to,

817

sizeof(struct sockaddr_in6));

813

ret = connect(tcp_sd, &to.in6, sizeof(to));

818

814

} else {

819

ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */

820

sizeof(struct sockaddr_in));

815

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

821

816

}

822

817

if(ret < 0){

823

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

818

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

824

819

int e = errno;

825

820

perror_plus("connect");

826

821

errno = e;

1041

1036

return retval;

1042

1037

}

1043

1038

1044

__attribute__((nonnull))

1045

1039

static void resolve_callback(AvahiSServiceResolver *r,

1046

1040

AvahiIfIndex interface,

1047

1041

AvahiProtocol proto,

1055

1049

AVAHI_GCC_UNUSED AvahiStringList *txt,

1056

1050

AVAHI_GCC_UNUSED AvahiLookupResultFlags

1057

1051

flags,

1058

void *mc){

1052

void* mc){

1059

1053

if(r == NULL){

1060

1054

return;

1061

1055

}

1114

1108

const char *domain,

1115

1109

AVAHI_GCC_UNUSED AvahiLookupResultFlags

1116

1110

flags,

1117

void *mc){

1111

void* mc){

1118

1112

if(b == NULL){

1119

1113

return;

1120

1114

}

1180

1174

errno = old_errno;

1181

1175

}

1182

1176

1183

__attribute__((nonnull, warn_unused_result))

1184

1177

bool get_flags(const char *ifname, struct ifreq *ifr){

1185

1178

int ret;

1186

1179

error_t ret_errno;

1205

1198

return true;

1206

1199

}

1207

1200

1208

__attribute__((nonnull, warn_unused_result))

1209

1201

bool good_flags(const char *ifname, const struct ifreq *ifr){

1210

1202

1211

1203

/* Reject the loopback device */

1253

1245

* corresponds to an acceptable network device.

1254

1246

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

1255

1247

*/

1256

__attribute__((nonnull, warn_unused_result))

1257

1248

int good_interface(const struct dirent *if_entry){

1258

1249

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

1259

1250

return 0;

1277

1268

/*

1278

1269

* This function determines if a network interface is up.

1279

1270

*/

1280

__attribute__((nonnull, warn_unused_result))

1281

1271

bool interface_is_up(const char *interface){

1282

1272

struct ifreq ifr;

1283

1273

if(not get_flags(interface, &ifr)){

1294

1284

/*

1295

1285

* This function determines if a network interface is running

1296

1286

*/

1297

__attribute__((nonnull, warn_unused_result))

1298

1287

bool interface_is_running(const char *interface){

1299

1288

struct ifreq ifr;

1300

1289

if(not get_flags(interface, &ifr)){

1308

1297

return (bool)(ifr.ifr_flags & IFF_RUNNING);

1309

1298

}

1310

1299

1311

__attribute__((nonnull, pure, warn_unused_result))

1312

1300

int notdotentries(const struct dirent *direntry){

1313

1301

/* Skip "." and ".." */

1314

1302

if(direntry->d_name[0] == '.'

1321

1309

}

1322

1310

1323

1311

/* Is this directory entry a runnable program? */

1324

__attribute__((nonnull, warn_unused_result))

1325

1312

int runnable_hook(const struct dirent *direntry){

1326

1313

int ret;

1327

1314

size_t sret;

1335

1322

sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"

1336

1323

"abcdefghijklmnopqrstuvwxyz"

1337

1324

"0123456789"

1338

"_.-");

1325

"_-");

1339

1326

if((direntry->d_name)[sret] != '\0'){

1340

1327

/* Contains non-allowed characters */

1341

1328

if(debug){

1359

1346

}

1360

1347

return 0;

1361

1348

}

1362

free(fullname);

1363

1349

if(not (S_ISREG(st.st_mode))){

1364

1350

/* Not a regular file */

1365

1351

if(debug){

1383

1369

return 1;

1384

1370

}

1385

1371

1386

__attribute__((nonnull, warn_unused_result))

1387

1372

int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,

1388

1373

mandos_context *mc){

1389

1374

int ret;

1393

1378

1394

1379

while(true){

1395

1380

if(mc->current_server == NULL){

1396

if(debug){

1381

if (debug){

1397

1382

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

1398

1383

" No timeout!\n");

1399

1384

}

1400

1385

ret = avahi_simple_poll_iterate(s, -1);

1401

1386

} else {

1402

if(debug){

1387

if (debug){

1403

1388

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

1404

1389

" it, or wait\n");

1405

1390

}

1422

1407

- ((intmax_t)waited_time.tv_sec * 1000))

1423

1408

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

1424

1409

1425

if(debug){

1410

if (debug){

1426

1411

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

1427

1412

block_time);

1428

1413

}

1450

1435

ret = avahi_simple_poll_iterate(s, (int)block_time);

1451

1436

}

1452

1437

if(ret != 0){

1453

if(ret > 0 or errno != EINTR){

1438

if (ret > 0 or errno != EINTR){

1454

1439

return (ret != 1) ? ret : 0;

1455

1440

}

1456

1441

}

1458

1443

}

1459

1444

1460

1445

/* Set effective uid to 0, return errno */

1461

__attribute__((warn_unused_result))

1462

1446

error_t raise_privileges(void){

1463

1447

error_t old_errno = errno;

1464

1448

error_t ret_errno = 0;

1471

1455

}

1472

1456

1473

1457

/* Set effective and real user ID to 0. Return errno. */

1474

__attribute__((warn_unused_result))

1475

1458

error_t raise_privileges_permanently(void){

1476

1459

error_t old_errno = errno;

1477

1460

error_t ret_errno = raise_privileges();

1488

1471

}

1489

1472

1490

1473

/* Set effective user ID to unprivileged saved user ID */

1491

__attribute__((warn_unused_result))

1492

1474

error_t lower_privileges(void){

1493

1475

error_t old_errno = errno;

1494

1476

error_t ret_errno = 0;

1501

1483

}

1502

1484

1503

1485

/* Lower privileges permanently */

1504

__attribute__((warn_unused_result))

1505

1486

error_t lower_privileges_permanently(void){

1506

1487

error_t old_errno = errno;

1507

1488

error_t ret_errno = 0;

1513

1494

return ret_errno;

1514

1495

}

1515

1496

1516

__attribute__((nonnull))

1517

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

1497

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

1518

1498

const float delay){

1519

1499

struct dirent **direntries;

1520

1500

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

1548

1528

if(hook_pid == 0){

1549

1529

/* Child */

1550

1530

/* Raise privileges */

1551

if(raise_privileges_permanently() != 0){

1552

perror_plus("Failed to raise privileges");

1553

_exit(EX_NOPERM);

1554

}

1531

raise_privileges_permanently();

1555

1532

/* Set group */

1556

1533

errno = 0;

1557

1534

ret = setgid(0);

1558

1535

if(ret == -1){

1559

1536

perror_plus("setgid");

1560

_exit(EX_NOPERM);

1561

1537

}

1562

1538

/* Reset supplementary groups */

1563

1539

errno = 0;

1564

1540

ret = setgroups(0, NULL);

1565

1541

if(ret == -1){

1566

1542

perror_plus("setgroups");

1567

_exit(EX_NOPERM);

1568

}

1569

ret = dup2(devnull, STDIN_FILENO);

1570

if(ret == -1){

1571

perror_plus("dup2(devnull, STDIN_FILENO)");

1572

_exit(EX_OSERR);

1573

}

1574

ret = close(devnull);

1575

if(ret == -1){

1576

perror_plus("close");

1577

_exit(EX_OSERR);

1578

}

1579

ret = dup2(STDERR_FILENO, STDOUT_FILENO);

1580

if(ret == -1){

1581

perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");

1582

_exit(EX_OSERR);

1583

}

1543

}

1544

dup2(devnull, STDIN_FILENO);

1545

close(devnull);

1546

dup2(STDERR_FILENO, STDOUT_FILENO);

1584

1547

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

1585

1548

if(ret == -1){

1586

1549

perror_plus("setenv");

1602

1565

_exit(EX_OSERR);

1603

1566

}

1604

1567

char *delaystring;

1605

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

1568

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

1606

1569

if(ret == -1){

1607

1570

perror_plus("asprintf");

1608

1571

_exit(EX_OSERR);

1661

1624

}

1662

1625

close(devnull);

1663

1626

}

1627

return true;

1664

1628

}

1665

1629

1666

__attribute__((nonnull, warn_unused_result))

1667

1630

error_t bring_up_interface(const char *const interface,

1668

1631

const float delay){

1632

int sd = -1;

1669

1633

error_t old_errno = errno;

1670

int ret;

1634

error_t ret_errno = 0;

1635

int ret, ret_setflags;

1671

1636

struct ifreq network;

1672

1637

unsigned int if_index = if_nametoindex(interface);

1673

1638

if(if_index == 0){

1682

1647

}

1683

1648

1684

1649

if(not interface_is_up(interface)){

1685

error_t ret_errno = 0, ioctl_errno = 0;

1686

if(not get_flags(interface, &network)){

1650

if(not get_flags(interface, &network) and debug){

1687

1651

ret_errno = errno;

1688

1652

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

1689

1653

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

1690

errno = old_errno;

1691

1654

return ret_errno;

1692

1655

}

1693

network.ifr_flags |= IFF_UP; /* set flag */

1656

network.ifr_flags |= IFF_UP;

1694

1657

1695

int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);

1696

if(sd == -1){

1658

sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);

1659

if(sd < 0){

1697

1660

ret_errno = errno;

1698

1661

perror_plus("socket");

1699

1662

errno = old_errno;

1700

1663

return ret_errno;

1701

1664

}

1702

1665

1703

1666

if(quit_now){

1704

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

1705

if(ret == -1){

1706

perror_plus("close");

1707

}

1667

close(sd);

1708

1668

errno = old_errno;

1709

1669

return EINTR;

1710

1670

}

1714

1674

interface);

1715

1675

}

1716

1676

1717

/* Raise privileges */

1718

ret_errno = raise_privileges();

1719

if(ret_errno != 0){

1720

perror_plus("Failed to raise privileges");

1721

}

1677

/* Raise priviliges */

1678

raise_privileges();

1722

1679

1723

1680

#ifdef __linux__

1724

int ret_linux;

1725

bool restore_loglevel = false;

1726

if(ret_errno == 0){

1727

/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO

1728

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

1729

ret_linux = klogctl(8, NULL, 5);

1730

if(ret_linux == -1){

1731

perror_plus("klogctl");

1732

} else {

1733

restore_loglevel = true;

1734

}

1681

/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO

1682

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

1683

int ret_linux = klogctl(8, NULL, 5);

1684

bool restore_loglevel = true;

1685

if(ret_linux == -1){

1686

restore_loglevel = false;

1687

perror_plus("klogctl");

1735

1688

}

1736

1689

#endif /* __linux__ */

1737

int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);

1738

ioctl_errno = errno;

1690

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

1691

ret_errno = errno;

1739

1692

#ifdef __linux__

1740

1693

if(restore_loglevel){

1741

1694

ret_linux = klogctl(7, NULL, 0);

1745

1698

}

1746

1699

#endif /* __linux__ */

1747

1700

1748

/* If raise_privileges() succeeded above */

1749

if(ret_errno == 0){

1750

/* Lower privileges */

1751

ret_errno = lower_privileges();

1752

if(ret_errno != 0){

1753

errno = ret_errno;

1754

perror_plus("Failed to lower privileges");

1755

}

1756

}

1701

/* Lower privileges */

1702

lower_privileges();

1757

1703

1758

1704

/* Close the socket */

1759

1705

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

1762

1708

}

1763

1709

1764

1710

if(ret_setflags == -1){

1765

errno = ioctl_errno;

1711

errno = ret_errno;

1766

1712

perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");

1767

1713

errno = old_errno;

1768

return ioctl_errno;

1714

return ret_errno;

1769

1715

}

1770

1716

} else if(debug){

1771

1717

fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",

1789

1735

return 0;

1790

1736

}

1791

1737

1792

__attribute__((nonnull, warn_unused_result))

1793

1738

error_t take_down_interface(const char *const interface){

1794

1739

error_t old_errno = errno;

1795

1740

struct ifreq network;

1800

1745

return ENXIO;

1801

1746

}

1802

1747

if(interface_is_up(interface)){

1803

error_t ret_errno = 0, ioctl_errno = 0;

1748

error_t ret_errno = 0;

1804

1749

if(not get_flags(interface, &network) and debug){

1805

1750

ret_errno = errno;

1806

1751

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

1807

1752

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

1808

errno = old_errno;

1809

1753

return ret_errno;

1810

1754

}

1811

1755

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

1812

1756

1813

1757

int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);

1814

if(sd == -1){

1758

if(sd < 0){

1815

1759

ret_errno = errno;

1816

1760

perror_plus("socket");

1817

1761

errno = old_errno;

1823

1767

interface);

1824

1768

}

1825

1769

1826

/* Raise privileges */

1827

ret_errno = raise_privileges();

1828

if(ret_errno != 0){

1829

perror_plus("Failed to raise privileges");

1830

}

1770

/* Raise priviliges */

1771

raise_privileges();

1831

1772

1832

1773

int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);

1833

ioctl_errno = errno;

1774

ret_errno = errno;

1834

1775

1835

/* If raise_privileges() succeeded above */

1836

if(ret_errno == 0){

1837

/* Lower privileges */

1838

ret_errno = lower_privileges();

1839

if(ret_errno != 0){

1840

errno = ret_errno;

1841

perror_plus("Failed to lower privileges");

1842

}

1843

}

1776

/* Lower privileges */

1777

lower_privileges();

1844

1778

1845

1779

/* Close the socket */

1846

1780

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

1849

1783

}

1850

1784

1851

1785

if(ret_setflags == -1){

1852

errno = ioctl_errno;

1786

errno = ret_errno;

1853

1787

perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");

1854

1788

errno = old_errno;

1855

return ioctl_errno;

1789

return ret_errno;

1856

1790

}

1857

1791

} else if(debug){

1858

1792

fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",

1866

1800

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

1867

1801

mandos_context mc = { .server = NULL, .dh_bits = 1024,

1868

1802

.priority = "SECURE256:!CTYPE-X.509:"

1869

"+CTYPE-OPENPGP", .current_server = NULL,

1803

"+CTYPE-OPENPGP", .current_server = NULL,

1870

1804

.interfaces = NULL, .interfaces_size = 0 };

1871

1805

AvahiSServiceBrowser *sb = NULL;

1872

1806

error_t ret_errno;

1876

1810

int exitcode = EXIT_SUCCESS;

1877

1811

char *interfaces_to_take_down = NULL;

1878

1812

size_t interfaces_to_take_down_size = 0;

1879

char run_tempdir[] = "/run/tmp/mandosXXXXXX";

1880

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

1881

char *tempdir = NULL;

1813

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

1814

bool tempdir_created = false;

1882

1815

AvahiIfIndex if_index = AVAHI_IF_UNSPEC;

1883

1816

const char *seckey = PATHDIR "/" SECKEY;

1884

1817

const char *pubkey = PATHDIR "/" PUBKEY;

2066

1999

/* Work around Debian bug #633582:

2067

2000

<http://bugs.debian.org/633582> */

2068

2001

2069

/* Re-raise privileges */

2070

ret_errno = raise_privileges();

2071

if(ret_errno != 0){

2072

errno = ret_errno;

2073

perror_plus("Failed to raise privileges");

2074

} else {

2002

/* Re-raise priviliges */

2003

if(raise_privileges() == 0){

2075

2004

struct stat st;

2076

2005

2077

2006

if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){

2117

2046

}

2118

2047

2119

2048

/* Lower privileges */

2120

ret_errno = lower_privileges();

2121

if(ret_errno != 0){

2122

errno = ret_errno;

2123

perror_plus("Failed to lower privileges");

2124

}

2049

lower_privileges();

2125

2050

}

2126

2051

}

2127

2052

2153

2078

memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);

2154

2079

argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');

2155

2080

}

2156

run_network_hooks("start", interfaces_hooks != NULL ?

2157

interfaces_hooks : "", delay);

2081

if(not run_network_hooks("start", interfaces_hooks != NULL ?

2082

interfaces_hooks : "", delay)){

2083

goto end;

2084

}

2158

2085

}

2159

2086

2160

2087

if(not debug){

2288

2215

break;

2289

2216

}

2290

2217

bool interface_was_up = interface_is_up(interface);

2291

errno = bring_up_interface(interface, delay);

2218

ret = bring_up_interface(interface, delay);

2292

2219

if(not interface_was_up){

2293

if(errno != 0){

2220

if(ret != 0){

2221

errno = ret;

2294

2222

perror_plus("Failed to bring up interface");

2295

2223

} else {

2296

errno = argz_add(&interfaces_to_take_down,

2297

&interfaces_to_take_down_size,

2298

interface);

2299

if(errno != 0){

2224

ret_errno = argz_add(&interfaces_to_take_down,

2225

&interfaces_to_take_down_size,

2226

interface);

2227

if(ret_errno != 0){

2228

errno = ret_errno;

2300

2229

perror_plus("argz_add");

2301

2230

}

2302

2231

}

2333

2262

goto end;

2334

2263

}

2335

2264

2336

/* Try /run/tmp before /tmp */

2337

tempdir = mkdtemp(run_tempdir);

2338

if(tempdir == NULL and errno == ENOENT){

2339

if(debug){

2340

fprintf_plus(stderr, "Tempdir %s did not work, trying %s\n",

2341

run_tempdir, old_tempdir);

2342

}

2343

tempdir = mkdtemp(old_tempdir);

2344

}

2345

if(tempdir == NULL){

2265

if(mkdtemp(tempdir) == NULL){

2346

2266

perror_plus("mkdtemp");

2347

2267

goto end;

2348

2268

}

2269

tempdir_created = true;

2349

2270

2350

2271

if(quit_now){

2351

2272

goto end;

2426

2347

sleep((unsigned int)retry_interval);

2427

2348

}

2428

2349

2429

if(not quit_now){

2350

if (not quit_now){

2430

2351

exitcode = EXIT_SUCCESS;

2431

2352

}

2432

2353

2487

2408

if(debug){

2488

2409

fprintf_plus(stderr, "Starting Avahi loop search\n");

2489

2410

}

2490

2411

2491

2412

ret = avahi_loop_with_timeout(simple_poll,

2492

2413

(int)(retry_interval * 1000), &mc);

2493

2414

if(debug){

2534

2455

}

2535

2456

}

2536

2457

2537

/* Re-raise privileges */

2458

/* Re-raise priviliges */

2538

2459

{

2539

ret_errno = raise_privileges();

2540

if(ret_errno != 0){

2541

perror_plus("Failed to raise privileges");

2542

} else {

2543

2544

/* Run network hooks */

2545

run_network_hooks("stop", interfaces_hooks != NULL ?

2546

interfaces_hooks : "", delay);

2547

2548

/* Take down the network interfaces which were brought up */

2549

{

2550

char *interface = NULL;

2551

while((interface=argz_next(interfaces_to_take_down,

2552

interfaces_to_take_down_size,

2553

interface))){

2554

ret_errno = take_down_interface(interface);

2555

if(ret_errno != 0){

2556

errno = ret_errno;

2557

perror_plus("Failed to take down interface");

2558

}

2559

}

2560

if(debug and (interfaces_to_take_down == NULL)){

2561

fprintf_plus(stderr, "No interfaces needed to be taken"

2562

" down\n");

2563

}

2564

}

2565

}

2566

2567

ret_errno = lower_privileges_permanently();

2568

if(ret_errno != 0){

2569

perror_plus("Failed to lower privileges permanently");

2570

}

2460

raise_privileges();

2461

2462

/* Run network hooks */

2463

run_network_hooks("stop", interfaces_hooks != NULL ?

2464

interfaces_hooks : "", delay);

2465

2466

/* Take down the network interfaces which were brought up */

2467

{

2468

char *interface = NULL;

2469

while((interface=argz_next(interfaces_to_take_down,

2470

interfaces_to_take_down_size,

2471

interface))){

2472

ret_errno = take_down_interface(interface);

2473

if(ret_errno != 0){

2474

errno = ret_errno;

2475

perror_plus("Failed to take down interface");

2476

}

2477

}

2478

if(debug and (interfaces_to_take_down == NULL)){

2479

fprintf_plus(stderr, "No interfaces needed to be taken"

2480

" down\n");

2481

}

2482

}

2483

2484

lower_privileges_permanently();

2571

2485

}

2572

2486

2573

2487

free(interfaces_to_take_down);

2574

2488

free(interfaces_hooks);

2575

2489

2576

2490

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

2577

if(tempdir != NULL){

2491

if(tempdir_created){

2578

2492

struct dirent **direntries = NULL;

2579

2493

struct dirent *direntry = NULL;

2580

2494

int numentries = scandir(tempdir, &direntries, notdotentries,

2581

2495

alphasort);

2582

if(numentries > 0){

2496

if (numentries > 0){

2583

2497

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

2584

2498

direntry = direntries[i];

2585

2499

char *fullname = NULL;

2597

2511

free(fullname);

2598

2512

}

2599

2513

}

2600

2514

2601

2515

/* need to clean even if 0 because man page doesn't specify */

2602

2516

free(direntries);

2603

if(numentries == -1){

2517

if (numentries == -1){

2604

2518

perror_plus("scandir");

2605

2519

}

2606

2520

ret = rmdir(tempdir);