/mandos/trunk : revision 675

136

137

bool debug = false;

138

static const char mandos_protocol_version[] = "1";

139

const char *argp_program_version = "mandos-client " VERSION;

140

const char *argp_program_bug_address = "<mandos@recompile.se>";

139

const char * argp_program_version = "mandos-client " VERSION;

140

const char * argp_program_bug_address = "<mandos@recompile.se>";

141

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

142

char *connect_to = NULL;

143

const char *hookdir = HOOKDIR;

183

perror(print_text);

184

}

185

186

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

186

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

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))

201

202

size_t incbuffer(char **buffer, size_t buffer_length,

202

203

size_t buffer_capacity){

203

204

if(buffer_length + BUFFER_SIZE > buffer_capacity){

216

217

}

217

218

219

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

220

__attribute__((nonnull, warn_unused_result))

219

221

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

220

222

int af, server **current_server){

221

223

int ret;

232

234

perror_plus("strdup");

233

235

return false;

234

236

}

237

ret = clock_gettime(CLOCK_MONOTONIC, &(new_server->last_seen));

238

if(ret == -1){

239

perror_plus("clock_gettime");

240

return false;

241

}

235

242

/* Special case of first server */

236

243

if(*current_server == NULL){

237

244

new_server->next = new_server;

238

245

new_server->prev = new_server;

239

246

*current_server = new_server;

240

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

241

247

} else {

248

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

242

249

new_server->next = *current_server;

243

250

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

244

251

new_server->prev->next = new_server;

245

252

(*current_server)->prev = new_server;

246

253

}

247

ret = clock_gettime(CLOCK_MONOTONIC, &(*current_server)->last_seen);

248

if(ret == -1){

249

perror_plus("clock_gettime");

250

return false;

251

}

252

254

return true;

253

255

}

254

256

255

257

/*

256

258

* Initialize GPGME.

257

259

*/

258

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

259

const char *tempdir, mandos_context *mc){

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){

260

265

gpgme_error_t rc;

261

266

gpgme_engine_info_t engine_info;

262

267

263

268

/*

264

269

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

265

270

*/

266

bool import_key(const char *filename){

271

bool import_key(const char * const filename){

267

272

int ret;

268

273

int fd;

269

274

gpgme_data_t pgp_data;

350

355

* Decrypt OpenPGP data.

351

356

* Returns -1 on error

352

357

*/

358

__attribute__((nonnull, warn_unused_result))

353

359

static ssize_t pgp_packet_decrypt(const char *cryptotext,

354

360

size_t crypto_size,

355

361

char **plaintext,

475

481

return plaintext_length;

476

482

}

477

483

478

static const char * safer_gnutls_strerror(int value){

484

__attribute__((warn_unused_result))

485

static const char *safer_gnutls_strerror(int value){

479

486

const char *ret = gnutls_strerror(value);

480

487

if(ret == NULL)

481

488

ret = "(unknown)";

483

490

}

484

491

485

492

/* GnuTLS log function callback */

493

__attribute__((nonnull))

486

494

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

487

495

const char* string){

488

496

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

489

497

}

490

498

499

__attribute__((nonnull, warn_unused_result))

491

500

static int init_gnutls_global(const char *pubkeyfilename,

492

501

const char *seckeyfilename,

493

502

mandos_context *mc){

567

576

return -1;

568

577

}

569

578

579

__attribute__((nonnull, warn_unused_result))

570

580

static int init_gnutls_session(gnutls_session_t *session,

571

581

mandos_context *mc){

572

582

int ret;

629

639

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

630

640

631

641

/* Called when a Mandos server is found */

642

__attribute__((nonnull, warn_unused_result))

632

643

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

633

644

AvahiIfIndex if_index,

634

645

int af, mandos_context *mc){

635

646

int ret, tcp_sd = -1;

636

647

ssize_t sret;

637

union {

638

struct sockaddr_in in;

639

struct sockaddr_in6 in6;

640

} to;

648

struct sockaddr_storage to;

641

649

char *buffer = NULL;

642

650

char *decrypted_buffer = NULL;

643

651

size_t buffer_length = 0;

724

732

725

733

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

726

734

if(af == AF_INET6){

727

to.in6.sin6_family = (sa_family_t)af;

728

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

735

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

736

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

729

737

} else { /* IPv4 */

730

to.in.sin_family = (sa_family_t)af;

731

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

738

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

739

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

732

740

}

733

741

if(ret < 0 ){

734

742

int e = errno;

743

751

goto mandos_end;

744

752

}

745

753

if(af == AF_INET6){

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

754

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

755

if(IN6_IS_ADDR_LINKLOCAL

756

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

756

757

if(if_index == AVAHI_IF_UNSPEC){

757

758

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

758

759

" incomplete without a network interface\n");

760

761

goto mandos_end;

761

762

}

762

763

/* Set the network interface number as scope */

763

to.in6.sin6_scope_id = (uint32_t)if_index;

764

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

764

765

}

765

766

} else {

766

to.in.sin_port = htons(port);

767

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

767

768

}

768

769

770

if(quit_now){

787

788

char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?

788

789

INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";

789

790

if(af == AF_INET6){

790

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

791

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

792

sizeof(struct sockaddr_in6),

791

793

addrstr, sizeof(addrstr), NULL, 0,

792

794

NI_NUMERICHOST);

793

795

} else {

794

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

796

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

797

sizeof(struct sockaddr_in),

795

798

addrstr, sizeof(addrstr), NULL, 0,

796

799

NI_NUMERICHOST);

797

800

}

810

813

}

811

814

812

815

if(af == AF_INET6){

813

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

816

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

817

sizeof(struct sockaddr_in6));

814

818

} else {

815

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

819

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

820

sizeof(struct sockaddr_in));

816

821

}

817

822

if(ret < 0){

818

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

823

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

819

824

int e = errno;

820

825

perror_plus("connect");

821

826

errno = e;

1036

1041

return retval;

1037

1042

}

1038

1043

1044

__attribute__((nonnull))

1039

1045

static void resolve_callback(AvahiSServiceResolver *r,

1040

1046

AvahiIfIndex interface,

1041

1047

AvahiProtocol proto,

1049

1055

AVAHI_GCC_UNUSED AvahiStringList *txt,

1050

1056

AVAHI_GCC_UNUSED AvahiLookupResultFlags

1051

1057

flags,

1052

void* mc){

1058

void *mc){

1053

1059

if(r == NULL){

1054

1060

return;

1055

1061

}

1108

1114

const char *domain,

1109

1115

AVAHI_GCC_UNUSED AvahiLookupResultFlags

1110

1116

flags,

1111

void* mc){

1117

void *mc){

1112

1118

if(b == NULL){

1113

1119

return;

1114

1120

}

1174

1180

errno = old_errno;

1175

1181

}

1176

1182

1183

__attribute__((nonnull, warn_unused_result))

1177

1184

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

1178

1185

int ret;

1179

1186

error_t ret_errno;

1198

1205

return true;

1199

1206

}

1200

1207

1208

__attribute__((nonnull, warn_unused_result))

1201

1209

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

1202

1210

1203

1211

/* Reject the loopback device */

1245

1253

* corresponds to an acceptable network device.

1246

1254

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

1247

1255

*/

1256

__attribute__((nonnull, warn_unused_result))

1248

1257

int good_interface(const struct dirent *if_entry){

1249

1258

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

1250

1259

return 0;

1268

1277

/*

1269

1278

* This function determines if a network interface is up.

1270

1279

*/

1280

__attribute__((nonnull, warn_unused_result))

1271

1281

bool interface_is_up(const char *interface){

1272

1282

struct ifreq ifr;

1273

1283

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

1284

1294

/*

1285

1295

* This function determines if a network interface is running

1286

1296

*/

1297

__attribute__((nonnull, warn_unused_result))

1287

1298

bool interface_is_running(const char *interface){

1288

1299

struct ifreq ifr;

1289

1300

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

1297

1308

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

1298

1309

}

1299

1310

1311

__attribute__((nonnull, pure, warn_unused_result))

1300

1312

int notdotentries(const struct dirent *direntry){

1301

1313

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

1302

1314

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

1309

1321

}

1310

1322

1311

1323

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

1324

__attribute__((nonnull, warn_unused_result))

1312

1325

int runnable_hook(const struct dirent *direntry){

1313

1326

int ret;

1314

1327

size_t sret;

1369

1382

return 1;

1370

1383

}

1371

1384

1385

__attribute__((nonnull, warn_unused_result))

1372

1386

int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,

1373

1387

mandos_context *mc){

1374

1388

int ret;

1378

1392

1379

1393

while(true){

1380

1394

if(mc->current_server == NULL){

1381

if (debug){

1395

if(debug){

1382

1396

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

1383

1397

" No timeout!\n");

1384

1398

}

1385

1399

ret = avahi_simple_poll_iterate(s, -1);

1386

1400

} else {

1387

if (debug){

1401

if(debug){

1388

1402

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

1389

1403

" it, or wait\n");

1390

1404

}

1407

1421

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

1408

1422

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

1409

1423

1410

if (debug){

1424

if(debug){

1411

1425

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

1412

1426

block_time);

1413

1427

}

1435

1449

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

1436

1450

}

1437

1451

if(ret != 0){

1438

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

1452

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

1439

1453

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

1440

1454

}

1441

1455

}

1443

1457

}

1444

1458

1445

1459

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

1460

__attribute__((warn_unused_result))

1446

1461

error_t raise_privileges(void){

1447

1462

error_t old_errno = errno;

1448

1463

error_t ret_errno = 0;

1455

1470

}

1456

1471

1457

1472

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

1473

__attribute__((warn_unused_result))

1458

1474

error_t raise_privileges_permanently(void){

1459

1475

error_t old_errno = errno;

1460

1476

error_t ret_errno = raise_privileges();

1471

1487

}

1472

1488

1473

1489

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

1490

__attribute__((warn_unused_result))

1474

1491

error_t lower_privileges(void){

1475

1492

error_t old_errno = errno;

1476

1493

error_t ret_errno = 0;

1483

1500

}

1484

1501

1485

1502

/* Lower privileges permanently */

1503

__attribute__((warn_unused_result))

1486

1504

error_t lower_privileges_permanently(void){

1487

1505

error_t old_errno = errno;

1488

1506

error_t ret_errno = 0;

1494

1512

return ret_errno;

1495

1513

}

1496

1514

1497

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

1515

__attribute__((nonnull))

1516

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

1498

1517

const float delay){

1499

1518

struct dirent **direntries;

1500

1519

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

1528

1547

if(hook_pid == 0){

1529

1548

/* Child */

1530

1549

/* Raise privileges */

1531

raise_privileges_permanently();

1550

if(raise_privileges_permanently() != 0){

1551

perror_plus("Failed to raise privileges");

1552

_exit(EX_NOPERM);

1553

}

1532

1554

/* Set group */

1533

1555

errno = 0;

1534

1556

ret = setgid(0);

1535

1557

if(ret == -1){

1536

1558

perror_plus("setgid");

1559

_exit(EX_NOPERM);

1537

1560

}

1538

1561

/* Reset supplementary groups */

1539

1562

errno = 0;

1540

1563

ret = setgroups(0, NULL);

1541

1564

if(ret == -1){

1542

1565

perror_plus("setgroups");

1543

}

1544

dup2(devnull, STDIN_FILENO);

1545

close(devnull);

1546

dup2(STDERR_FILENO, STDOUT_FILENO);

1566

_exit(EX_NOPERM);

1567

}

1568

ret = dup2(devnull, STDIN_FILENO);

1569

if(ret == -1){

1570

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

1571

_exit(EX_OSERR);

1572

}

1573

ret = close(devnull);

1574

if(ret == -1){

1575

perror_plus("close");

1576

_exit(EX_OSERR);

1577

}

1578

ret = dup2(STDERR_FILENO, STDOUT_FILENO);

1579

if(ret == -1){

1580

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

1581

_exit(EX_OSERR);

1582

}

1547

1583

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

1548

1584

if(ret == -1){

1549

1585

perror_plus("setenv");

1565

1601

_exit(EX_OSERR);

1566

1602

}

1567

1603

char *delaystring;

1568

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

1604

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

1569

1605

if(ret == -1){

1570

1606

perror_plus("asprintf");

1571

1607

_exit(EX_OSERR);

1624

1660

}

1625

1661

close(devnull);

1626

1662

}

1627

return true;

1628

1663

}

1629

1664

1665

__attribute__((nonnull, warn_unused_result))

1630

1666

error_t bring_up_interface(const char *const interface,

1631

1667

const float delay){

1632

int sd = -1;

1633

1668

error_t old_errno = errno;

1634

error_t ret_errno = 0;

1635

int ret, ret_setflags;

1669

int ret;

1636

1670

struct ifreq network;

1637

1671

unsigned int if_index = if_nametoindex(interface);

1638

1672

if(if_index == 0){

1647

1681

}

1648

1682

1649

1683

if(not interface_is_up(interface)){

1650

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

1684

error_t ret_errno = 0, ioctl_errno = 0;

1685

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

1651

1686

ret_errno = errno;

1652

1687

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

1653

1688

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

1689

errno = old_errno;

1654

1690

return ret_errno;

1655

1691

}

1656

network.ifr_flags |= IFF_UP;

1692

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

1657

1693

1658

sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);

1659

if(sd < 0){

1694

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

1695

if(sd == -1){

1660

1696

ret_errno = errno;

1661

1697

perror_plus("socket");

1662

1698

errno = old_errno;

1663

1699

return ret_errno;

1664

1700

}

1665

1701

1666

1702

if(quit_now){

1667

close(sd);

1703

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

1704

if(ret == -1){

1705

perror_plus("close");

1706

}

1668

1707

errno = old_errno;

1669

1708

return EINTR;

1670

1709

}

1674

1713

interface);

1675

1714

}

1676

1715

1677

/* Raise priviliges */

1678

raise_privileges();

1679

1716

/* Raise privileges */

1717

ret_errno = raise_privileges();

1718

bool restore_loglevel = false;

1719

if(ret_errno != 0){

1720

perror_plus("Failed to raise privileges");

1721

}

1680

1722

#ifdef __linux__

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");

1723

int ret_linux;

1724

if(ret_errno == 0){

1725

/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO

1726

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

1727

ret_linux = klogctl(8, NULL, 5);

1728

if(ret_linux == -1){

1729

perror_plus("klogctl");

1730

} else {

1731

restore_loglevel = true;

1732

}

1688

1733

}

1689

1734

#endif /* __linux__ */

1690

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

1691

ret_errno = errno;

1735

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

1736

ioctl_errno = errno;

1692

1737

#ifdef __linux__

1693

1738

if(restore_loglevel){

1694

1739

ret_linux = klogctl(7, NULL, 0);

1698

1743

}

1699

1744

#endif /* __linux__ */

1700

1745

1701

/* Lower privileges */

1702

lower_privileges();

1746

/* If raise_privileges() succeeded above */

1747

if(ret_errno == 0){

1748

/* Lower privileges */

1749

ret_errno = lower_privileges();

1750

if(ret_errno != 0){

1751

errno = ret_errno;

1752

perror_plus("Failed to lower privileges");

1753

}

1754

}

1703

1755

1704

1756

/* Close the socket */

1705

1757

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

1708

1760

}

1709

1761

1710

1762

if(ret_setflags == -1){

1711

errno = ret_errno;

1763

errno = ioctl_errno;

1712

1764

perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");

1713

1765

errno = old_errno;

1714

return ret_errno;

1766

return ioctl_errno;

1715

1767

}

1716

1768

} else if(debug){

1717

1769

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

1735

1787

return 0;

1736

1788

}

1737

1789

1790

__attribute__((nonnull, warn_unused_result))

1738

1791

error_t take_down_interface(const char *const interface){

1739

1792

error_t old_errno = errno;

1740

1793

struct ifreq network;

1745

1798

return ENXIO;

1746

1799

}

1747

1800

if(interface_is_up(interface)){

1748

error_t ret_errno = 0;

1801

error_t ret_errno = 0, ioctl_errno = 0;

1749

1802

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

1750

1803

ret_errno = errno;

1751

1804

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

1752

1805

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

1806

errno = old_errno;

1753

1807

return ret_errno;

1754

1808

}

1755

1809

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

1756

1810

1757

1811

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

1758

if(sd < 0){

1812

if(sd == -1){

1759

1813

ret_errno = errno;

1760

1814

perror_plus("socket");

1761

1815

errno = old_errno;

1767

1821

interface);

1768

1822

}

1769

1823

1770

/* Raise priviliges */

1771

raise_privileges();

1772

1824

/* Raise privileges */

1825

ret_errno = raise_privileges();

1826

if(ret_errno != 0){

1827

perror_plus("Failed to raise privileges");

1828

}

1773

1829

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

1774

ret_errno = errno;

1830

ioctl_errno = errno;

1775

1831

1776

/* Lower privileges */

1777

lower_privileges();

1832

/* If raise_privileges() succeeded above */

1833

if(ret_errno == 0){

1834

/* Lower privileges */

1835

ret_errno = lower_privileges();

1836

if(ret_errno != 0){

1837

errno = ret_errno;

1838

perror_plus("Failed to lower privileges");

1839

}

1840

}

1778

1841

1779

1842

/* Close the socket */

1780

1843

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

1783

1846

}

1784

1847

1785

1848

if(ret_setflags == -1){

1786

errno = ret_errno;

1849

errno = ioctl_errno;

1787

1850

perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");

1788

1851

errno = old_errno;

1789

return ret_errno;

1852

return ioctl_errno;

1790

1853

}

1791

1854

} else if(debug){

1792

1855

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

1800

1863

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

1801

1864

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

1802

1865

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

1803

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

1866

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

1804

1867

.interfaces = NULL, .interfaces_size = 0 };

1805

1868

AvahiSServiceBrowser *sb = NULL;

1806

1869

error_t ret_errno;

1810

1873

int exitcode = EXIT_SUCCESS;

1811

1874

char *interfaces_to_take_down = NULL;

1812

1875

size_t interfaces_to_take_down_size = 0;

1813

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

1814

bool tempdir_created = false;

1876

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

1877

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

1878

char *tempdir = NULL;

1815

1879

AvahiIfIndex if_index = AVAHI_IF_UNSPEC;

1816

1880

const char *seckey = PATHDIR "/" SECKEY;

1817

1881

const char *pubkey = PATHDIR "/" PUBKEY;

1999

2063

/* Work around Debian bug #633582:

2000

2064

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

2001

2065

2002

/* Re-raise priviliges */

2003

if(raise_privileges() == 0){

2066

/* Re-raise privileges */

2067

ret_errno = raise_privileges();

2068

if(ret_errno != 0){

2069

errno = ret_errno;

2070

perror_plus("Failed to raise privileges");

2071

} else {

2004

2072

struct stat st;

2005

2073

2006

2074

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

2046

2114

}

2047

2115

2048

2116

/* Lower privileges */

2049

lower_privileges();

2117

ret_errno = lower_privileges();

2118

if(ret_errno != 0){

2119

errno = ret_errno;

2120

perror_plus("Failed to lower privileges");

2121

}

2050

2122

}

2051

2123

}

2052

2124

2078

2150

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

2079

2151

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

2080

2152

}

2081

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

2082

interfaces_hooks : "", delay)){

2083

goto end;

2084

}

2153

run_network_hooks("start", interfaces_hooks != NULL ?

2154

interfaces_hooks : "", delay);

2085

2155

}

2086

2156

2087

2157

if(not debug){

2215

2285

break;

2216

2286

}

2217

2287

bool interface_was_up = interface_is_up(interface);

2218

ret = bring_up_interface(interface, delay);

2288

errno = bring_up_interface(interface, delay);

2219

2289

if(not interface_was_up){

2220

if(ret != 0){

2221

errno = ret;

2290

if(errno != 0){

2222

2291

perror_plus("Failed to bring up interface");

2223

2292

} else {

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;

2293

errno = argz_add(&interfaces_to_take_down,

2294

&interfaces_to_take_down_size,

2295

interface);

2296

if(errno != 0){

2229

2297

perror_plus("argz_add");

2230

2298

}

2231

2299

}

2262

2330

goto end;

2263

2331

}

2264

2332

2265

if(mkdtemp(tempdir) == NULL){

2333

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

2334

tempdir = mkdtemp(run_tempdir);

2335

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

2336

if(debug){

2337

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

2338

run_tempdir, old_tempdir);

2339

}

2340

tempdir = mkdtemp(old_tempdir);

2341

}

2342

if(tempdir == NULL){

2266

2343

perror_plus("mkdtemp");

2267

2344

goto end;

2268

2345

}

2269

tempdir_created = true;

2270

2346

2271

2347

if(quit_now){

2272

2348

goto end;

2347

2423

sleep((unsigned int)retry_interval);

2348

2424

}

2349

2425

2350

if (not quit_now){

2426

if(not quit_now){

2351

2427

exitcode = EXIT_SUCCESS;

2352

2428

}

2353

2429

2455

2531

}

2456

2532

}

2457

2533

2458

/* Re-raise priviliges */

2534

/* Re-raise privileges */

2459

2535

{

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();

2536

ret_errno = raise_privileges();

2537

if(ret_errno != 0){

2538

perror_plus("Failed to raise privileges");

2539

} else {

2540

2541

/* Run network hooks */

2542

run_network_hooks("stop", interfaces_hooks != NULL ?

2543

interfaces_hooks : "", delay);

2544

2545

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

2546

{

2547

char *interface = NULL;

2548

while((interface=argz_next(interfaces_to_take_down,

2549

interfaces_to_take_down_size,

2550

interface))){

2551

ret_errno = take_down_interface(interface);

2552

if(ret_errno != 0){

2553

errno = ret_errno;

2554

perror_plus("Failed to take down interface");

2555

}

2556

}

2557

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

2558

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

2559

" down\n");

2560

}

2561

}

2562

}

2563

ret_errno = lower_privileges_permanently();

2564

if(ret_errno != 0){

2565

perror_plus("Failed to lower privileges permanently");

2566

}

2485

2567

}

2486

2568

2487

2569

free(interfaces_to_take_down);

2488

2570

free(interfaces_hooks);

2489

2571

2490

2572

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

2491

if(tempdir_created){

2573

if(tempdir != NULL){

2492

2574

struct dirent **direntries = NULL;

2493

2575

struct dirent *direntry = NULL;

2494

2576

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

2495

2577

alphasort);

2496

if (numentries > 0){

2578

if(numentries > 0){

2497

2579

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

2498

2580

direntry = direntries[i];

2499

2581

char *fullname = NULL;

2514

2596

2515

2597

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

2516

2598

free(direntries);

2517

if (numentries == -1){

2599

if(numentries == -1){

2518

2600

perror_plus("scandir");

2519

2601

}

2520

2602

ret = rmdir(tempdir);