/mandos/release : revision 237.7.237

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)))

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;

242

244

new_server->next = new_server;

243

245

new_server->prev = new_server;

244

246

*current_server = new_server;

245

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

246

247

} else {

248

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

247

249

new_server->next = *current_server;

248

250

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

249

251

new_server->prev->next = new_server;

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){

740

751

goto mandos_end;

741

752

}

742

753

if(af == AF_INET6){

743

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

754

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

744

755

if(IN6_IS_ADDR_LINKLOCAL

745

756

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

746

757

if(if_index == AVAHI_IF_UNSPEC){

1030

1041

return retval;

1031

1042

}

1032

1043

1044

__attribute__((nonnull))

1033

1045

static void resolve_callback(AvahiSServiceResolver *r,

1034

1046

AvahiIfIndex interface,

1035

1047

AvahiProtocol proto,

1043

1055

AVAHI_GCC_UNUSED AvahiStringList *txt,

1044

1056

AVAHI_GCC_UNUSED AvahiLookupResultFlags

1045

1057

flags,

1046

void* mc){

1058

void *mc){

1047

1059

if(r == NULL){

1048

1060

return;

1049

1061

}

1102

1114

const char *domain,

1103

1115

AVAHI_GCC_UNUSED AvahiLookupResultFlags

1104

1116

flags,

1105

void* mc){

1117

void *mc){

1106

1118

if(b == NULL){

1107

1119

return;

1108

1120

}

1168

1180

errno = old_errno;

1169

1181

}

1170

1182

1183

__attribute__((nonnull, warn_unused_result))

1171

1184

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

1172

1185

int ret;

1173

1186

error_t ret_errno;

1192

1205

return true;

1193

1206

}

1194

1207

1208

__attribute__((nonnull, warn_unused_result))

1195

1209

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

1196

1210

1197

1211

/* Reject the loopback device */

1239

1253

* corresponds to an acceptable network device.

1240

1254

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

1241

1255

*/

1256

__attribute__((nonnull, warn_unused_result))

1242

1257

int good_interface(const struct dirent *if_entry){

1243

1258

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

1244

1259

return 0;

1262

1277

/*

1263

1278

* This function determines if a network interface is up.

1264

1279

*/

1280

__attribute__((nonnull, warn_unused_result))

1265

1281

bool interface_is_up(const char *interface){

1266

1282

struct ifreq ifr;

1267

1283

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

1278

1294

/*

1279

1295

* This function determines if a network interface is running

1280

1296

*/

1297

__attribute__((nonnull, warn_unused_result))

1281

1298

bool interface_is_running(const char *interface){

1282

1299

struct ifreq ifr;

1283

1300

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

1291

1308

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

1292

1309

}

1293

1310

1311

__attribute__((nonnull, pure, warn_unused_result))

1294

1312

int notdotentries(const struct dirent *direntry){

1295

1313

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

1296

1314

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

1303

1321

}

1304

1322

1305

1323

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

1324

__attribute__((nonnull, warn_unused_result))

1306

1325

int runnable_hook(const struct dirent *direntry){

1307

1326

int ret;

1308

1327

size_t sret;

1316

1335

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

1317

1336

"abcdefghijklmnopqrstuvwxyz"

1318

1337

"0123456789"

1319

"_-");

1338

"_.-");

1320

1339

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

1321

1340

/* Contains non-allowed characters */

1322

1341

if(debug){

1340

1359

}

1341

1360

return 0;

1342

1361

}

1362

free(fullname);

1343

1363

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

1344

1364

/* Not a regular file */

1345

1365

if(debug){

1363

1383

return 1;

1364

1384

}

1365

1385

1386

__attribute__((nonnull, warn_unused_result))

1366

1387

int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,

1367

1388

mandos_context *mc){

1368

1389

int ret;

1437

1458

}

1438

1459

1439

1460

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

1461

__attribute__((warn_unused_result))

1440

1462

error_t raise_privileges(void){

1441

1463

error_t old_errno = errno;

1442

1464

error_t ret_errno = 0;

1449

1471

}

1450

1472

1451

1473

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

1474

__attribute__((warn_unused_result))

1452

1475

error_t raise_privileges_permanently(void){

1453

1476

error_t old_errno = errno;

1454

1477

error_t ret_errno = raise_privileges();

1465

1488

}

1466

1489

1467

1490

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

1491

__attribute__((warn_unused_result))

1468

1492

error_t lower_privileges(void){

1469

1493

error_t old_errno = errno;

1470

1494

error_t ret_errno = 0;

1477

1501

}

1478

1502

1479

1503

/* Lower privileges permanently */

1504

__attribute__((warn_unused_result))

1480

1505

error_t lower_privileges_permanently(void){

1481

1506

error_t old_errno = errno;

1482

1507

error_t ret_errno = 0;

1488

1513

return ret_errno;

1489

1514

}

1490

1515

1491

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

1516

__attribute__((nonnull))

1517

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

1492

1518

const float delay){

1493

1519

struct dirent **direntries;

1494

1520

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

1522

1548

if(hook_pid == 0){

1523

1549

/* Child */

1524

1550

/* Raise privileges */

1525

raise_privileges_permanently();

1551

if(raise_privileges_permanently() != 0){

1552

perror_plus("Failed to raise privileges");

1553

_exit(EX_NOPERM);

1554

}

1526

1555

/* Set group */

1527

1556

errno = 0;

1528

1557

ret = setgid(0);

1529

1558

if(ret == -1){

1530

1559

perror_plus("setgid");

1560

_exit(EX_NOPERM);

1531

1561

}

1532

1562

/* Reset supplementary groups */

1533

1563

errno = 0;

1534

1564

ret = setgroups(0, NULL);

1535

1565

if(ret == -1){

1536

1566

perror_plus("setgroups");

1537

}

1538

dup2(devnull, STDIN_FILENO);

1539

close(devnull);

1540

dup2(STDERR_FILENO, STDOUT_FILENO);

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

}

1541

1584

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

1542

1585

if(ret == -1){

1543

1586

perror_plus("setenv");

1559

1602

_exit(EX_OSERR);

1560

1603

}

1561

1604

char *delaystring;

1562

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

1605

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

1563

1606

if(ret == -1){

1564

1607

perror_plus("asprintf");

1565

1608

_exit(EX_OSERR);

1618

1661

}

1619

1662

close(devnull);

1620

1663

}

1621

return true;

1622

1664

}

1623

1665

1666

__attribute__((nonnull, warn_unused_result))

1624

1667

error_t bring_up_interface(const char *const interface,

1625

1668

const float delay){

1626

int sd = -1;

1627

1669

error_t old_errno = errno;

1628

error_t ret_errno = 0;

1629

int ret, ret_setflags;

1670

int ret;

1630

1671

struct ifreq network;

1631

1672

unsigned int if_index = if_nametoindex(interface);

1632

1673

if(if_index == 0){

1641

1682

}

1642

1683

1643

1684

if(not interface_is_up(interface)){

1644

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

1685

error_t ret_errno = 0, ioctl_errno = 0;

1686

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

1645

1687

ret_errno = errno;

1646

1688

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

1647

1689

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

1690

errno = old_errno;

1648

1691

return ret_errno;

1649

1692

}

1650

network.ifr_flags |= IFF_UP;

1693

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

1651

1694

1652

sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);

1653

if(sd < 0){

1695

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

1696

if(sd == -1){

1654

1697

ret_errno = errno;

1655

1698

perror_plus("socket");

1656

1699

errno = old_errno;

1657

1700

return ret_errno;

1658

1701

}

1659

1702

1660

1703

if(quit_now){

1661

close(sd);

1704

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

1705

if(ret == -1){

1706

perror_plus("close");

1707

}

1662

1708

errno = old_errno;

1663

1709

return EINTR;

1664

1710

}

1668

1714

interface);

1669

1715

}

1670

1716

1671

/* Raise priviliges */

1672

raise_privileges();

1717

/* Raise privileges */

1718

ret_errno = raise_privileges();

1719

if(ret_errno != 0){

1720

perror_plus("Failed to raise privileges");

1721

}

1673

1722

1674

1723

#ifdef __linux__

1675

/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO

1676

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

1677

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

1678

bool restore_loglevel = true;

1679

if(ret_linux == -1){

1680

restore_loglevel = false;

1681

perror_plus("klogctl");

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

}

1682

1735

}

1683

1736

#endif /* __linux__ */

1684

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

1685

ret_errno = errno;

1737

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

1738

ioctl_errno = errno;

1686

1739

#ifdef __linux__

1687

1740

if(restore_loglevel){

1688

1741

ret_linux = klogctl(7, NULL, 0);

1692

1745

}

1693

1746

#endif /* __linux__ */

1694

1747

1695

/* Lower privileges */

1696

lower_privileges();

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

}

1697

1757

1698

1758

/* Close the socket */

1699

1759

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

1702

1762

}

1703

1763

1704

1764

if(ret_setflags == -1){

1705

errno = ret_errno;

1765

errno = ioctl_errno;

1706

1766

perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");

1707

1767

errno = old_errno;

1708

return ret_errno;

1768

return ioctl_errno;

1709

1769

}

1710

1770

} else if(debug){

1711

1771

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

1729

1789

return 0;

1730

1790

}

1731

1791

1792

__attribute__((nonnull, warn_unused_result))

1732

1793

error_t take_down_interface(const char *const interface){

1733

1794

error_t old_errno = errno;

1734

1795

struct ifreq network;

1739

1800

return ENXIO;

1740

1801

}

1741

1802

if(interface_is_up(interface)){

1742

error_t ret_errno = 0;

1803

error_t ret_errno = 0, ioctl_errno = 0;

1743

1804

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

1744

1805

ret_errno = errno;

1745

1806

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

1746

1807

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

1808

errno = old_errno;

1747

1809

return ret_errno;

1748

1810

}

1749

1811

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

1750

1812

1751

1813

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

1752

if(sd < 0){

1814

if(sd == -1){

1753

1815

ret_errno = errno;

1754

1816

perror_plus("socket");

1755

1817

errno = old_errno;

1761

1823

interface);

1762

1824

}

1763

1825

1764

/* Raise priviliges */

1765

raise_privileges();

1826

/* Raise privileges */

1827

ret_errno = raise_privileges();

1828

if(ret_errno != 0){

1829

perror_plus("Failed to raise privileges");

1830

}

1766

1831

1767

1832

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

1768

ret_errno = errno;

1833

ioctl_errno = errno;

1769

1834

1770

/* Lower privileges */

1771

lower_privileges();

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

}

1772

1844

1773

1845

/* Close the socket */

1774

1846

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

1777

1849

}

1778

1850

1779

1851

if(ret_setflags == -1){

1780

errno = ret_errno;

1852

errno = ioctl_errno;

1781

1853

perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");

1782

1854

errno = old_errno;

1783

return ret_errno;

1855

return ioctl_errno;

1784

1856

}

1785

1857

} else if(debug){

1786

1858

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

1794

1866

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

1795

1867

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

1796

1868

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

1797

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

1869

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

1798

1870

.interfaces = NULL, .interfaces_size = 0 };

1799

1871

AvahiSServiceBrowser *sb = NULL;

1800

1872

error_t ret_errno;

1804

1876

int exitcode = EXIT_SUCCESS;

1805

1877

char *interfaces_to_take_down = NULL;

1806

1878

size_t interfaces_to_take_down_size = 0;

1807

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

1808

bool tempdir_created = false;

1879

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

1880

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

1881

char *tempdir = NULL;

1809

1882

AvahiIfIndex if_index = AVAHI_IF_UNSPEC;

1810

1883

const char *seckey = PATHDIR "/" SECKEY;

1811

1884

const char *pubkey = PATHDIR "/" PUBKEY;

1993

2066

/* Work around Debian bug #633582:

1994

2067

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

1995

2068

1996

/* Re-raise priviliges */

1997

if(raise_privileges() == 0){

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 {

1998

2075

struct stat st;

1999

2076

2000

2077

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

2040

2117

}

2041

2118

2042

2119

/* Lower privileges */

2043

lower_privileges();

2120

ret_errno = lower_privileges();

2121

if(ret_errno != 0){

2122

errno = ret_errno;

2123

perror_plus("Failed to lower privileges");

2124

}

2044

2125

}

2045

2126

}

2046

2127

2072

2153

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

2073

2154

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

2074

2155

}

2075

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

2076

interfaces_hooks : "", delay)){

2077

goto end;

2078

}

2156

run_network_hooks("start", interfaces_hooks != NULL ?

2157

interfaces_hooks : "", delay);

2079

2158

}

2080

2159

2081

2160

if(not debug){

2209

2288

break;

2210

2289

}

2211

2290

bool interface_was_up = interface_is_up(interface);

2212

ret = bring_up_interface(interface, delay);

2291

errno = bring_up_interface(interface, delay);

2213

2292

if(not interface_was_up){

2214

if(ret != 0){

2215

errno = ret;

2293

if(errno != 0){

2216

2294

perror_plus("Failed to bring up interface");

2217

2295

} else {

2218

ret_errno = argz_add(&interfaces_to_take_down,

2219

&interfaces_to_take_down_size,

2220

interface);

2221

if(ret_errno != 0){

2222

errno = ret_errno;

2296

errno = argz_add(&interfaces_to_take_down,

2297

&interfaces_to_take_down_size,

2298

interface);

2299

if(errno != 0){

2223

2300

perror_plus("argz_add");

2224

2301

}

2225

2302

}

2256

2333

goto end;

2257

2334

}

2258

2335

2259

if(mkdtemp(tempdir) == NULL){

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){

2260

2346

perror_plus("mkdtemp");

2261

2347

goto end;

2262

2348

}

2263

tempdir_created = true;

2264

2349

2265

2350

if(quit_now){

2266

2351

goto end;

2402

2487

if(debug){

2403

2488

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

2404

2489

}

2405

2490

2406

2491

ret = avahi_loop_with_timeout(simple_poll,

2407

2492

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

2408

2493

if(debug){

2449

2534

}

2450

2535

}

2451

2536

2452

/* Re-raise priviliges */

2537

/* Re-raise privileges */

2453

2538

{

2454

raise_privileges();

2455

2456

/* Run network hooks */

2457

run_network_hooks("stop", interfaces_hooks != NULL ?

2458

interfaces_hooks : "", delay);

2459

2460

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

2461

{

2462

char *interface = NULL;

2463

while((interface=argz_next(interfaces_to_take_down,

2464

interfaces_to_take_down_size,

2465

interface))){

2466

ret_errno = take_down_interface(interface);

2467

if(ret_errno != 0){

2468

errno = ret_errno;

2469

perror_plus("Failed to take down interface");

2470

}

2471

}

2472

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

2473

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

2474

" down\n");

2475

}

2476

}

2477

2478

lower_privileges_permanently();

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

}

2479

2571

}

2480

2572

2481

2573

free(interfaces_to_take_down);

2482

2574

free(interfaces_hooks);

2483

2575

2484

2576

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

2485

if(tempdir_created){

2577

if(tempdir != NULL){

2486

2578

struct dirent **direntries = NULL;

2487

2579

struct dirent *direntry = NULL;

2488

2580

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

2505

2597

free(fullname);

2506

2598

}

2507

2599

}

2508

2600

2509

2601

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

2510

2602

free(direntries);

2511

2603

if(numentries == -1){