/mandos/trunk : revision 667

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;

234

232

perror_plus("strdup");

235

233

return false;

236

234

}

237

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

238

if(ret == -1){

239

perror_plus("clock_gettime");

240

return false;

241

}

242

235

/* Special case of first server */

243

236

if(*current_server == NULL){

244

237

new_server->next = new_server;

245

238

new_server->prev = new_server;

246

239

*current_server = new_server;

240

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

247

241

} else {

248

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

249

242

new_server->next = *current_server;

250

243

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

251

244

new_server->prev->next = new_server;

252

245

(*current_server)->prev = new_server;

253

246

}

247

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

248

if(ret == -1){

249

perror_plus("clock_gettime");

250

return false;

251

}

254

252

return true;

255

253

}

256

254

257

255

/*

258

256

* Initialize GPGME.

259

257

*/

260

__attribute__((nonnull, warn_unused_result))

261

258

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

262

259

const char *tempdir, mandos_context *mc){

263

260

gpgme_error_t rc;

353

350

* Decrypt OpenPGP data.

354

351

* Returns -1 on error

355

352

*/

356

__attribute__((nonnull, warn_unused_result))

357

353

static ssize_t pgp_packet_decrypt(const char *cryptotext,

358

354

size_t crypto_size,

359

355

char **plaintext,

479

475

return plaintext_length;

480

476

}

481

477

482

__attribute__((warn_unused_result))

483

static const char *safer_gnutls_strerror(int value){

478

static const char * safer_gnutls_strerror(int value){

484

479

const char *ret = gnutls_strerror(value);

485

480

if(ret == NULL)

486

481

ret = "(unknown)";

488

483

}

489

484

490

485

/* GnuTLS log function callback */

491

__attribute__((nonnull))

492

486

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

493

487

const char* string){

494

488

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

495

489

}

496

490

497

__attribute__((nonnull, warn_unused_result))

498

491

static int init_gnutls_global(const char *pubkeyfilename,

499

492

const char *seckeyfilename,

500

493

mandos_context *mc){

574

567

return -1;

575

568

}

576

569

577

__attribute__((nonnull, warn_unused_result))

578

570

static int init_gnutls_session(gnutls_session_t *session,

579

571

mandos_context *mc){

580

572

int ret;

637

629

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

638

630

639

631

/* Called when a Mandos server is found */

640

__attribute__((nonnull, warn_unused_result))

641

632

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

642

633

AvahiIfIndex if_index,

643

634

int af, mandos_context *mc){

644

635

int ret, tcp_sd = -1;

645

636

ssize_t sret;

646

struct sockaddr_storage to;

637

union {

638

struct sockaddr_in in;

639

struct sockaddr_in6 in6;

640

} to;

647

641

char *buffer = NULL;

648

642

char *decrypted_buffer = NULL;

649

643

size_t buffer_length = 0;

730

724

731

725

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

732

726

if(af == AF_INET6){

733

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

734

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);

735

729

} else { /* IPv4 */

736

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

737

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);

738

732

}

739

733

if(ret < 0 ){

740

734

int e = errno;

749

743

goto mandos_end;

750

744

}

751

745

if(af == AF_INET6){

752

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

753

if(IN6_IS_ADDR_LINKLOCAL

754

(&((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

755

756

if(if_index == AVAHI_IF_UNSPEC){

756

757

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

757

758

" incomplete without a network interface\n");

759

760

goto mandos_end;

760

761

}

761

762

/* Set the network interface number as scope */

762

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

763

to.in6.sin6_scope_id = (uint32_t)if_index;

763

764

}

764

765

} else {

765

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

766

to.in.sin_port = htons(port);

766

767

}

767

768

769

if(quit_now){

786

787

char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?

787

788

INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";

788

789

if(af == AF_INET6){

789

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

790

sizeof(struct sockaddr_in6),

790

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

791

addrstr, sizeof(addrstr), NULL, 0,

792

NI_NUMERICHOST);

793

} else {

794

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

795

sizeof(struct sockaddr_in),

794

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

796

795

addrstr, sizeof(addrstr), NULL, 0,

797

796

NI_NUMERICHOST);

798

797

}

811

810

}

812

811

813

812

if(af == AF_INET6){

814

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

815

sizeof(struct sockaddr_in6));

813

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

816

814

} else {

817

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

818

sizeof(struct sockaddr_in));

815

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

819

816

}

820

817

if(ret < 0){

821

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

818

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

822

819

int e = errno;

823

820

perror_plus("connect");

824

821

errno = e;

1039

1036

return retval;

1040

1037

}

1041

1038

1042

__attribute__((nonnull))

1043

1039

static void resolve_callback(AvahiSServiceResolver *r,

1044

1040

AvahiIfIndex interface,

1045

1041

AvahiProtocol proto,

1053

1049

AVAHI_GCC_UNUSED AvahiStringList *txt,

1054

1050

AVAHI_GCC_UNUSED AvahiLookupResultFlags

1055

1051

flags,

1056

void *mc){

1052

void* mc){

1057

1053

if(r == NULL){

1058

1054

return;

1059

1055

}

1112

1108

const char *domain,

1113

1109

AVAHI_GCC_UNUSED AvahiLookupResultFlags

1114

1110

flags,

1115

void *mc){

1111

void* mc){

1116

1112

if(b == NULL){

1117

1113

return;

1118

1114

}

1178

1174

errno = old_errno;

1179

1175

}

1180

1176

1181

__attribute__((nonnull, warn_unused_result))

1182

1177

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

1183

1178

int ret;

1184

1179

error_t ret_errno;

1203

1198

return true;

1204

1199

}

1205

1200

1206

__attribute__((nonnull, warn_unused_result))

1207

1201

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

1208

1202

1209

1203

/* Reject the loopback device */

1251

1245

* corresponds to an acceptable network device.

1252

1246

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

1253

1247

*/

1254

__attribute__((nonnull, warn_unused_result))

1255

1248

int good_interface(const struct dirent *if_entry){

1256

1249

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

1257

1250

return 0;

1275

1268

/*

1276

1269

* This function determines if a network interface is up.

1277

1270

*/

1278

__attribute__((nonnull, warn_unused_result))

1279

1271

bool interface_is_up(const char *interface){

1280

1272

struct ifreq ifr;

1281

1273

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

1292

1284

/*

1293

1285

* This function determines if a network interface is running

1294

1286

*/

1295

__attribute__((nonnull, warn_unused_result))

1296

1287

bool interface_is_running(const char *interface){

1297

1288

struct ifreq ifr;

1298

1289

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

1306

1297

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

1307

1298

}

1308

1299

1309

__attribute__((nonnull, pure, warn_unused_result))

1310

1300

int notdotentries(const struct dirent *direntry){

1311

1301

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

1312

1302

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

1319

1309

}

1320

1310

1321

1311

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

1322

__attribute__((nonnull, warn_unused_result))

1323

1312

int runnable_hook(const struct dirent *direntry){

1324

1313

int ret;

1325

1314

size_t sret;

1380

1369

return 1;

1381

1370

}

1382

1371

1383

__attribute__((nonnull, warn_unused_result))

1384

1372

int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,

1385

1373

mandos_context *mc){

1386

1374

int ret;

1390

1378

1391

1379

while(true){

1392

1380

if(mc->current_server == NULL){

1393

if(debug){

1381

if (debug){

1394

1382

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

1395

1383

" No timeout!\n");

1396

1384

}

1397

1385

ret = avahi_simple_poll_iterate(s, -1);

1398

1386

} else {

1399

if(debug){

1387

if (debug){

1400

1388

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

1401

1389

" it, or wait\n");

1402

1390

}

1419

1407

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

1420

1408

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

1421

1409

1422

if(debug){

1410

if (debug){

1423

1411

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

1424

1412

block_time);

1425

1413

}

1447

1435

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

1448

1436

}

1449

1437

if(ret != 0){

1450

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

1438

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

1451

1439

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

1452

1440

}

1453

1441

}

1455

1443

}

1456

1444

1457

1445

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

1458

__attribute__((warn_unused_result))

1459

1446

error_t raise_privileges(void){

1460

1447

error_t old_errno = errno;

1461

1448

error_t ret_errno = 0;

1468

1455

}

1469

1456

1470

1457

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

1471

__attribute__((warn_unused_result))

1472

1458

error_t raise_privileges_permanently(void){

1473

1459

error_t old_errno = errno;

1474

1460

error_t ret_errno = raise_privileges();

1485

1471

}

1486

1472

1487

1473

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

1488

__attribute__((warn_unused_result))

1489

1474

error_t lower_privileges(void){

1490

1475

error_t old_errno = errno;

1491

1476

error_t ret_errno = 0;

1498

1483

}

1499

1484

1500

1485

/* Lower privileges permanently */

1501

__attribute__((warn_unused_result))

1502

1486

error_t lower_privileges_permanently(void){

1503

1487

error_t old_errno = errno;

1504

1488

error_t ret_errno = 0;

1510

1494

return ret_errno;

1511

1495

}

1512

1496

1513

__attribute__((nonnull))

1514

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

1497

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

1515

1498

const float delay){

1516

1499

struct dirent **direntries;

1517

1500

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

1545

1528

if(hook_pid == 0){

1546

1529

/* Child */

1547

1530

/* Raise privileges */

1548

if(raise_privileges_permanently() != 0){

1549

perror_plus("Failed to raise privileges");

1550

_exit(EX_NOPERM);

1551

}

1531

raise_privileges_permanently();

1552

1532

/* Set group */

1553

1533

errno = 0;

1554

1534

ret = setgid(0);

1555

1535

if(ret == -1){

1556

1536

perror_plus("setgid");

1557

_exit(EX_NOPERM);

1558

1537

}

1559

1538

/* Reset supplementary groups */

1560

1539

errno = 0;

1561

1540

ret = setgroups(0, NULL);

1562

1541

if(ret == -1){

1563

1542

perror_plus("setgroups");

1564

_exit(EX_NOPERM);

1565

}

1566

ret = dup2(devnull, STDIN_FILENO);

1567

if(ret == -1){

1568

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

1569

_exit(EX_OSERR);

1570

}

1571

ret = close(devnull);

1572

if(ret == -1){

1573

perror_plus("close");

1574

_exit(EX_OSERR);

1575

}

1576

ret = dup2(STDERR_FILENO, STDOUT_FILENO);

1577

if(ret == -1){

1578

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

1579

_exit(EX_OSERR);

1580

}

1543

}

1544

dup2(devnull, STDIN_FILENO);

1545

close(devnull);

1546

dup2(STDERR_FILENO, STDOUT_FILENO);

1581

1547

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

1582

1548

if(ret == -1){

1583

1549

perror_plus("setenv");

1599

1565

_exit(EX_OSERR);

1600

1566

}

1601

1567

char *delaystring;

1602

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

1568

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

1603

1569

if(ret == -1){

1604

1570

perror_plus("asprintf");

1605

1571

_exit(EX_OSERR);

1658

1624

}

1659

1625

close(devnull);

1660

1626

}

1627

return true;

1661

1628

}

1662

1629

1663

__attribute__((nonnull, warn_unused_result))

1664

1630

error_t bring_up_interface(const char *const interface,

1665

1631

const float delay){

1632

int sd = -1;

1666

1633

error_t old_errno = errno;

1667

int ret;

1634

error_t ret_errno = 0;

1635

int ret, ret_setflags;

1668

1636

struct ifreq network;

1669

1637

unsigned int if_index = if_nametoindex(interface);

1670

1638

if(if_index == 0){

1679

1647

}

1680

1648

1681

1649

if(not interface_is_up(interface)){

1682

error_t ret_errno = 0, ioctl_errno = 0;

1683

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

1650

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

1684

1651

ret_errno = errno;

1685

1652

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

1686

1653

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

1687

errno = old_errno;

1688

1654

return ret_errno;

1689

1655

}

1690

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

1656

network.ifr_flags |= IFF_UP;

1691

1657

1692

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

1693

if(sd == -1){

1658

sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);

1659

if(sd < 0){

1694

1660

ret_errno = errno;

1695

1661

perror_plus("socket");

1696

1662

errno = old_errno;

1697

1663

return ret_errno;

1698

1664

}

1699

1665

1700

1666

if(quit_now){

1701

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

1702

if(ret == -1){

1703

perror_plus("close");

1704

}

1667

close(sd);

1705

1668

errno = old_errno;

1706

1669

return EINTR;

1707

1670

}

1711

1674

interface);

1712

1675

}

1713

1676

1714

/* Raise privileges */

1715

ret_errno = raise_privileges();

1716

bool restore_loglevel = false;

1717

if(ret_errno != 0){

1718

perror_plus("Failed to raise privileges");

1719

}

1677

/* Raise priviliges */

1678

raise_privileges();

1679

1720

1680

#ifdef __linux__

1721

int ret_linux;

1722

if(ret_errno == 0){

1723

/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO

1724

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

1725

ret_linux = klogctl(8, NULL, 5);

1726

if(ret_linux == -1){

1727

perror_plus("klogctl");

1728

} else {

1729

restore_loglevel = true;

1730

}

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");

1731

1688

}

1732

1689

#endif /* __linux__ */

1733

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

1734

ioctl_errno = errno;

1690

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

1691

ret_errno = errno;

1735

1692

#ifdef __linux__

1736

1693

if(restore_loglevel){

1737

1694

ret_linux = klogctl(7, NULL, 0);

1741

1698

}

1742

1699

#endif /* __linux__ */

1743

1700

1744

/* If raise_privileges() succeeded above */

1745

if(ret_errno == 0){

1746

/* Lower privileges */

1747

ret_errno = lower_privileges();

1748

if(ret_errno != 0){

1749

errno = ret_errno;

1750

perror_plus("Failed to lower privileges");

1751

}

1752

}

1701

/* Lower privileges */

1702

lower_privileges();

1753

1703

1754

1704

/* Close the socket */

1755

1705

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

1758

1708

}

1759

1709

1760

1710

if(ret_setflags == -1){

1761

errno = ioctl_errno;

1711

errno = ret_errno;

1762

1712

perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");

1763

1713

errno = old_errno;

1764

return ioctl_errno;

1714

return ret_errno;

1765

1715

}

1766

1716

} else if(debug){

1767

1717

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

1785

1735

return 0;

1786

1736

}

1787

1737

1788

__attribute__((nonnull, warn_unused_result))

1789

1738

error_t take_down_interface(const char *const interface){

1790

1739

error_t old_errno = errno;

1791

1740

struct ifreq network;

1796

1745

return ENXIO;

1797

1746

}

1798

1747

if(interface_is_up(interface)){

1799

error_t ret_errno = 0, ioctl_errno = 0;

1748

error_t ret_errno = 0;

1800

1749

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

1801

1750

ret_errno = errno;

1802

1751

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

1803

1752

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

1804

errno = old_errno;

1805

1753

return ret_errno;

1806

1754

}

1807

1755

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

1808

1756

1809

1757

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

1810

if(sd == -1){

1758

if(sd < 0){

1811

1759

ret_errno = errno;

1812

1760

perror_plus("socket");

1813

1761

errno = old_errno;

1819

1767

interface);

1820

1768

}

1821

1769

1822

/* Raise privileges */

1823

ret_errno = raise_privileges();

1824

if(ret_errno != 0){

1825

perror_plus("Failed to raise privileges");

1826

}

1770

/* Raise priviliges */

1771

raise_privileges();

1772

1827

1773

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

1828

ioctl_errno = errno;

1774

ret_errno = errno;

1829

1775

1830

/* If raise_privileges() succeeded above */

1831

if(ret_errno == 0){

1832

/* Lower privileges */

1833

ret_errno = lower_privileges();

1834

if(ret_errno != 0){

1835

errno = ret_errno;

1836

perror_plus("Failed to lower privileges");

1837

}

1838

}

1776

/* Lower privileges */

1777

lower_privileges();

1839

1778

1840

1779

/* Close the socket */

1841

1780

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

1844

1783

}

1845

1784

1846

1785

if(ret_setflags == -1){

1847

errno = ioctl_errno;

1786

errno = ret_errno;

1848

1787

perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");

1849

1788

errno = old_errno;

1850

return ioctl_errno;

1789

return ret_errno;

1851

1790

}

1852

1791

} else if(debug){

1853

1792

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

1861

1800

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

1862

1801

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

1863

1802

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

1864

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

1803

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

1865

1804

.interfaces = NULL, .interfaces_size = 0 };

1866

1805

AvahiSServiceBrowser *sb = NULL;

1867

1806

error_t ret_errno;

2060

1999

/* Work around Debian bug #633582:

2061

2000

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

2062

2001

2063

/* Re-raise privileges */

2064

ret_errno = raise_privileges();

2065

if(ret_errno != 0){

2066

errno = ret_errno;

2067

perror_plus("Failed to raise privileges");

2068

} else {

2002

/* Re-raise priviliges */

2003

if(raise_privileges() == 0){

2069

2004

struct stat st;

2070

2005

2071

2006

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

2111

2046

}

2112

2047

2113

2048

/* Lower privileges */

2114

ret_errno = lower_privileges();

2115

if(ret_errno != 0){

2116

errno = ret_errno;

2117

perror_plus("Failed to lower privileges");

2118

}

2049

lower_privileges();

2119

2050

}

2120

2051

}

2121

2052

2147

2078

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

2148

2079

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

2149

2080

}

2150

run_network_hooks("start", interfaces_hooks != NULL ?

2151

interfaces_hooks : "", delay);

2081

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

2082

interfaces_hooks : "", delay)){

2083

goto end;

2084

}

2152

2085

}

2153

2086

2154

2087

if(not debug){

2282

2215

break;

2283

2216

}

2284

2217

bool interface_was_up = interface_is_up(interface);

2285

errno = bring_up_interface(interface, delay);

2218

ret = bring_up_interface(interface, delay);

2286

2219

if(not interface_was_up){

2287

if(errno != 0){

2220

if(ret != 0){

2221

errno = ret;

2288

2222

perror_plus("Failed to bring up interface");

2289

2223

} else {

2290

errno = argz_add(&interfaces_to_take_down,

2291

&interfaces_to_take_down_size,

2292

interface);

2293

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;

2294

2229

perror_plus("argz_add");

2295

2230

}

2296

2231

}

2412

2347

sleep((unsigned int)retry_interval);

2413

2348

}

2414

2349

2415

if(not quit_now){

2350

if (not quit_now){

2416

2351

exitcode = EXIT_SUCCESS;

2417

2352

}

2418

2353

2520

2455

}

2521

2456

}

2522

2457

2523

/* Re-raise privileges */

2458

/* Re-raise priviliges */

2524

2459

{

2525

ret_errno = raise_privileges();

2526

if(ret_errno != 0){

2527

perror_plus("Failed to raise privileges");

2528

} else {

2529

2530

/* Run network hooks */

2531

run_network_hooks("stop", interfaces_hooks != NULL ?

2532

interfaces_hooks : "", delay);

2533

2534

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

2535

{

2536

char *interface = NULL;

2537

while((interface=argz_next(interfaces_to_take_down,

2538

interfaces_to_take_down_size,

2539

interface))){

2540

ret_errno = take_down_interface(interface);

2541

if(ret_errno != 0){

2542

errno = ret_errno;

2543

perror_plus("Failed to take down interface");

2544

}

2545

}

2546

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

2547

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

2548

" down\n");

2549

}

2550

}

2551

}

2552

ret_errno = lower_privileges_permanently();

2553

if(ret_errno != 0){

2554

perror_plus("Failed to lower privileges permanently");

2555

}

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();

2556

2485

}

2557

2486

2558

2487

free(interfaces_to_take_down);

2564

2493

struct dirent *direntry = NULL;

2565

2494

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

2566

2495

alphasort);

2567

if(numentries > 0){

2496

if (numentries > 0){

2568

2497

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

2569

2498

direntry = direntries[i];

2570

2499

char *fullname = NULL;

2585

2514

2586

2515

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

2587

2516

free(direntries);

2588

if(numentries == -1){

2517

if (numentries == -1){

2589

2518

perror_plus("scandir");

2590

2519

}

2591

2520

ret = rmdir(tempdir);