734
790
if(if_indextoname((unsigned int)if_index, interface) == NULL){
735
791
perror_plus("if_indextoname");
737
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
738
"\n", ip, interface, port);
793
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIuMAX
794
"\n", ip, interface, (uintmax_t)port);
741
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
797
fprintf_plus(stderr, "Connection to: %s, port %" PRIuMAX "\n",
798
ip, (uintmax_t)port);
744
800
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
745
801
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
747
802
if(af == AF_INET6){
748
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
803
ret = getnameinfo((struct sockaddr *)&to,
804
sizeof(struct sockaddr_in6),
805
addrstr, sizeof(addrstr), NULL, 0,
751
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
808
ret = getnameinfo((struct sockaddr *)&to,
809
sizeof(struct sockaddr_in),
810
addrstr, sizeof(addrstr), NULL, 0,
755
perror_plus("inet_ntop");
757
if(strcmp(addrstr, ip) != 0){
758
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
813
if(ret == EAI_SYSTEM){
814
perror_plus("getnameinfo");
815
} else if(ret != 0) {
816
fprintf_plus(stderr, "getnameinfo: %s", gai_strerror(ret));
817
} else if(strcmp(addrstr, ip) != 0){
818
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
1395
1465
/* Set effective uid to 0, return errno */
1396
int raise_privileges(void){
1397
int old_errno = errno;
1466
__attribute__((warn_unused_result))
1467
error_t raise_privileges(void){
1468
error_t old_errno = errno;
1469
error_t ret_errno = 0;
1400
1470
if(seteuid(0) == -1){
1401
perror_plus("seteuid");
1404
1473
errno = old_errno;
1405
1474
return ret_errno;
1408
1477
/* Set effective and real user ID to 0. Return errno. */
1409
int raise_privileges_permanently(void){
1410
int old_errno = errno;
1411
int ret_errno = raise_privileges();
1478
__attribute__((warn_unused_result))
1479
error_t raise_privileges_permanently(void){
1480
error_t old_errno = errno;
1481
error_t ret_errno = raise_privileges();
1412
1482
if(ret_errno != 0){
1413
1483
errno = old_errno;
1414
1484
return ret_errno;
1417
1486
if(setuid(0) == -1){
1418
perror_plus("seteuid");
1421
1489
errno = old_errno;
1422
1490
return ret_errno;
1425
1493
/* Set effective user ID to unprivileged saved user ID */
1426
int lower_privileges(void){
1427
int old_errno = errno;
1494
__attribute__((warn_unused_result))
1495
error_t lower_privileges(void){
1496
error_t old_errno = errno;
1497
error_t ret_errno = 0;
1430
1498
if(seteuid(uid) == -1){
1431
perror_plus("seteuid");
1438
bool run_network_hooks(const char *mode, const char *interface,
1505
/* Lower privileges permanently */
1506
__attribute__((warn_unused_result))
1507
error_t lower_privileges_permanently(void){
1508
error_t old_errno = errno;
1509
error_t ret_errno = 0;
1510
if(setuid(uid) == -1){
1517
__attribute__((nonnull))
1518
void run_network_hooks(const char *mode, const char *interface,
1439
1519
const float delay){
1440
struct dirent **direntries;
1441
struct dirent *direntry;
1443
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1520
struct dirent **direntries = NULL;
1521
if(hookdir_fd == -1){
1522
hookdir_fd = open(hookdir, O_RDONLY);
1523
if(hookdir_fd == -1){
1524
if(errno == ENOENT){
1526
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1527
" found\n", hookdir);
1530
perror_plus("open");
1536
#if __GLIBC_PREREQ(2, 15)
1537
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1538
runnable_hook, alphasort);
1539
#else /* not __GLIBC_PREREQ(2, 15) */
1540
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1542
#endif /* not __GLIBC_PREREQ(2, 15) */
1543
#else /* not __GLIBC__ */
1544
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1546
#endif /* not __GLIBC__ */
1445
1547
if(numhooks == -1){
1446
1548
perror_plus("scandir");
1448
int devnull = open("/dev/null", O_RDONLY);
1449
for(int i = 0; i < numhooks; i++){
1450
direntry = direntries[i];
1451
char *fullname = NULL;
1452
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1551
struct dirent *direntry;
1553
int devnull = open("/dev/null", O_RDONLY);
1554
for(int i = 0; i < numhooks; i++){
1555
direntry = direntries[i];
1557
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1560
pid_t hook_pid = fork();
1563
/* Raise privileges */
1564
errno = raise_privileges_permanently();
1566
perror_plus("Failed to raise privileges");
1573
perror_plus("setgid");
1576
/* Reset supplementary groups */
1578
ret = setgroups(0, NULL);
1580
perror_plus("setgroups");
1583
ret = dup2(devnull, STDIN_FILENO);
1585
perror_plus("dup2(devnull, STDIN_FILENO)");
1588
ret = close(devnull);
1590
perror_plus("close");
1593
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1595
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1598
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1600
perror_plus("setenv");
1603
ret = setenv("DEVICE", interface, 1);
1605
perror_plus("setenv");
1608
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1610
perror_plus("setenv");
1613
ret = setenv("MODE", mode, 1);
1615
perror_plus("setenv");
1619
ret = asprintf(&delaystring, "%f", (double)delay);
1454
1621
perror_plus("asprintf");
1458
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1461
pid_t hook_pid = fork();
1464
/* Raise privileges */
1465
raise_privileges_permanently();
1470
perror_plus("setgid");
1472
/* Reset supplementary groups */
1474
ret = setgroups(0, NULL);
1476
perror_plus("setgroups");
1478
dup2(devnull, STDIN_FILENO);
1480
dup2(STDERR_FILENO, STDOUT_FILENO);
1481
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1483
perror_plus("setenv");
1486
ret = setenv("DEVICE", interface, 1);
1488
perror_plus("setenv");
1491
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1493
perror_plus("setenv");
1496
ret = setenv("MODE", mode, 1);
1498
perror_plus("setenv");
1502
ret = asprintf(&delaystring, "%f", delay);
1504
perror_plus("asprintf");
1507
ret = setenv("DELAY", delaystring, 1);
1510
perror_plus("setenv");
1624
ret = setenv("DELAY", delaystring, 1);
1513
1626
free(delaystring);
1514
if(connect_to != NULL){
1515
ret = setenv("CONNECT", connect_to, 1);
1517
perror_plus("setenv");
1521
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1522
perror_plus("execl");
1523
_exit(EXIT_FAILURE);
1627
perror_plus("setenv");
1631
if(connect_to != NULL){
1632
ret = setenv("CONNECT", connect_to, 1);
1634
perror_plus("setenv");
1638
int hook_fd = openat(hookdir_fd, direntry->d_name, O_RDONLY);
1640
perror_plus("openat");
1641
_exit(EXIT_FAILURE);
1643
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1644
perror_plus("close");
1645
_exit(EXIT_FAILURE);
1647
if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },
1649
perror_plus("fexecve");
1650
_exit(EXIT_FAILURE);
1654
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1655
perror_plus("waitpid");
1659
if(WIFEXITED(status)){
1660
if(WEXITSTATUS(status) != 0){
1661
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1662
" with status %d\n", direntry->d_name,
1663
WEXITSTATUS(status));
1667
} else if(WIFSIGNALED(status)){
1668
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1669
" signal %d\n", direntry->d_name,
1527
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1528
perror_plus("waitpid");
1532
if(WIFEXITED(status)){
1533
if(WEXITSTATUS(status) != 0){
1534
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1535
" with status %d\n", direntry->d_name,
1536
WEXITSTATUS(status));
1540
} else if(WIFSIGNALED(status)){
1541
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1542
" signal %d\n", direntry->d_name,
1547
fprintf_plus(stderr, "Warning: network hook \"%s\""
1548
" crashed\n", direntry->d_name);
1555
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1674
fprintf_plus(stderr, "Warning: network hook \"%s\""
1675
" crashed\n", direntry->d_name);
1681
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1687
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1688
perror_plus("close");
1564
int bring_up_interface(const char * const interface, const float delay){
1695
__attribute__((nonnull, warn_unused_result))
1696
error_t bring_up_interface(const char *const interface,
1698
error_t old_errno = errno;
1567
1700
struct ifreq network;
1568
AvahiIfIndex if_index = (AvahiIfIndex)if_nametoindex(interface);
1701
unsigned int if_index = if_nametoindex(interface);
1569
1702
if(if_index == 0){
1570
1703
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1571
return EX_UNAVAILABLE;
1578
/* Re-raise priviliges */
1582
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1583
messages about the network interface to mess up the prompt */
1584
ret = klogctl(8, NULL, 5);
1585
bool restore_loglevel = true;
1587
restore_loglevel = false;
1588
perror_plus("klogctl");
1590
#endif /* __linux__ */
1592
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1594
perror_plus("socket");
1596
if(restore_loglevel){
1597
ret = klogctl(7, NULL, 0);
1599
perror_plus("klogctl");
1602
#endif /* __linux__ */
1603
/* Lower privileges */
1608
strcpy(network.ifr_name, interface);
1609
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1611
perror_plus("ioctl SIOCGIFFLAGS");
1613
if(restore_loglevel){
1614
ret = klogctl(7, NULL, 0);
1616
perror_plus("klogctl");
1619
#endif /* __linux__ */
1620
/* Lower privileges */
1624
if((network.ifr_flags & IFF_UP) == 0){
1625
network.ifr_flags |= IFF_UP;
1626
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1713
if(not interface_is_up(interface)){
1714
error_t ret_errno = 0, ioctl_errno = 0;
1715
if(not get_flags(interface, &network)){
1717
fprintf_plus(stderr, "Failed to get flags for interface "
1718
"\"%s\"\n", interface);
1722
network.ifr_flags |= IFF_UP; /* set flag */
1724
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1727
perror_plus("socket");
1733
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1735
perror_plus("close");
1742
fprintf_plus(stderr, "Bringing up interface \"%s\"\n",
1746
/* Raise privileges */
1747
ret_errno = raise_privileges();
1750
perror_plus("Failed to raise privileges");
1755
bool restore_loglevel = false;
1757
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1758
messages about the network interface to mess up the prompt */
1759
ret_linux = klogctl(8, NULL, 5);
1760
if(ret_linux == -1){
1761
perror_plus("klogctl");
1763
restore_loglevel = true;
1766
#endif /* __linux__ */
1767
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1768
ioctl_errno = errno;
1770
if(restore_loglevel){
1771
ret_linux = klogctl(7, NULL, 0);
1772
if(ret_linux == -1){
1773
perror_plus("klogctl");
1776
#endif /* __linux__ */
1778
/* If raise_privileges() succeeded above */
1780
/* Lower privileges */
1781
ret_errno = lower_privileges();
1784
perror_plus("Failed to lower privileges");
1788
/* Close the socket */
1789
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1791
perror_plus("close");
1794
if(ret_setflags == -1){
1795
errno = ioctl_errno;
1628
1796
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1630
if(restore_loglevel){
1631
ret = klogctl(7, NULL, 0);
1633
perror_plus("klogctl");
1636
#endif /* __linux__ */
1637
/* Lower privileges */
1801
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1642
1805
/* Sleep checking until interface is running.
1643
1806
Check every 0.25s, up to total time of delay */
1644
1807
for(int i=0; i < delay * 4; i++){
1645
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1647
perror_plus("ioctl SIOCGIFFLAGS");
1648
} else if(network.ifr_flags & IFF_RUNNING){
1808
if(interface_is_running(interface)){
1651
1811
struct timespec sleeptime = { .tv_nsec = 250000000 };
1654
1814
perror_plus("nanosleep");
1657
/* Close the socket */
1658
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1660
perror_plus("close");
1822
__attribute__((nonnull, warn_unused_result))
1823
error_t take_down_interface(const char *const interface){
1824
error_t old_errno = errno;
1825
struct ifreq network;
1826
unsigned int if_index = if_nametoindex(interface);
1828
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1663
if(restore_loglevel){
1664
/* Restores kernel loglevel to default */
1665
ret = klogctl(7, NULL, 0);
1832
if(interface_is_up(interface)){
1833
error_t ret_errno = 0, ioctl_errno = 0;
1834
if(not get_flags(interface, &network) and debug){
1836
fprintf_plus(stderr, "Failed to get flags for interface "
1837
"\"%s\"\n", interface);
1841
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1843
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1846
perror_plus("socket");
1852
fprintf_plus(stderr, "Taking down interface \"%s\"\n",
1856
/* Raise privileges */
1857
ret_errno = raise_privileges();
1860
perror_plus("Failed to raise privileges");
1863
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1864
ioctl_errno = errno;
1866
/* If raise_privileges() succeeded above */
1868
/* Lower privileges */
1869
ret_errno = lower_privileges();
1872
perror_plus("Failed to lower privileges");
1876
/* Close the socket */
1877
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
1667
perror_plus("klogctl");
1879
perror_plus("close");
1882
if(ret_setflags == -1){
1883
errno = ioctl_errno;
1884
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1889
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1670
#endif /* __linux__ */
1671
/* Lower privileges */
1676
1897
int main(int argc, char *argv[]){
1898
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1899
.priority = "SECURE256:!CTYPE-X.509:"
1900
"+CTYPE-OPENPGP", .current_server = NULL,
1901
.interfaces = NULL, .interfaces_size = 0 };
1677
1902
AvahiSServiceBrowser *sb = NULL;
1680
1905
intmax_t tmpmax;
1682
1907
int exitcode = EXIT_SUCCESS;
1683
const char *interface = "";
1684
struct ifreq network;
1686
bool take_down_interface = false;
1687
char tempdir[] = "/tmp/mandosXXXXXX";
1688
bool tempdir_created = false;
1908
char *interfaces_to_take_down = NULL;
1909
size_t interfaces_to_take_down_size = 0;
1910
char run_tempdir[] = "/run/tmp/mandosXXXXXX";
1911
char old_tempdir[] = "/tmp/mandosXXXXXX";
1912
char *tempdir = NULL;
1689
1913
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1690
1914
const char *seckey = PATHDIR "/" SECKEY;
1691
1915
const char *pubkey = PATHDIR "/" PUBKEY;
1916
char *interfaces_hooks = NULL;
1693
1918
bool gnutls_initialized = false;
1694
1919
bool gpgme_initialized = false;
1917
2150
/* Lower privileges */
1921
perror_plus("seteuid");
2151
ret_errno = lower_privileges();
2154
perror_plus("Failed to lower privileges");
2159
/* Remove invalid interface names (except "none") */
2161
char *interface = NULL;
2162
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2164
if(strcmp(interface, "none") != 0
2165
and if_nametoindex(interface) == 0){
2166
if(interface[0] != '\0'){
2167
fprintf_plus(stderr, "Not using nonexisting interface"
2168
" \"%s\"\n", interface);
2170
argz_delete(&mc.interfaces, &mc.interfaces_size, interface);
1926
2176
/* Run network hooks */
1927
if(not run_network_hooks("start", interface, delay)){
2178
if(mc.interfaces != NULL){
2179
interfaces_hooks = malloc(mc.interfaces_size);
2180
if(interfaces_hooks == NULL){
2181
perror_plus("malloc");
2184
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2185
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2187
run_network_hooks("start", interfaces_hooks != NULL ?
2188
interfaces_hooks : "", delay);
1932
2192
avahi_set_log_function(empty_log);
1935
if(interface[0] == '\0'){
1936
struct dirent **direntries;
1937
/* First look for interfaces that are up */
1938
ret = scandir(sys_class_net, &direntries, up_interface,
1941
/* No up interfaces, look for any good interfaces */
1943
ret = scandir(sys_class_net, &direntries, good_interface,
1947
/* Pick the first interface returned */
1948
interface = strdup(direntries[0]->d_name);
1950
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1952
if(interface == NULL){
1953
perror_plus("malloc");
1955
exitcode = EXIT_FAILURE;
1961
fprintf_plus(stderr, "Could not find a network interface\n");
1962
exitcode = EXIT_FAILURE;
1967
2195
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1968
2196
from the signal handler */
1969
2197
/* Initialize the pseudo-RNG for Avahi */
1970
2198
srand((unsigned int) time(NULL));
1971
mc.simple_poll = avahi_simple_poll_new();
1972
if(mc.simple_poll == NULL){
2199
simple_poll = avahi_simple_poll_new();
2200
if(simple_poll == NULL){
1973
2201
fprintf_plus(stderr,
1974
2202
"Avahi: Failed to create simple poll object.\n");
1975
2203
exitcode = EX_UNAVAILABLE;
2042
/* If the interface is down, bring it up */
2043
if((interface[0] != '\0') and (strcmp(interface, "none") != 0)){
2044
ret = bring_up_interface(interface, delay);
2047
perror_plus("Failed to bring up interface");
2270
/* If no interfaces were specified, make a list */
2271
if(mc.interfaces == NULL){
2272
struct dirent **direntries = NULL;
2273
/* Look for any good interfaces */
2274
ret = scandir(sys_class_net, &direntries, good_interface,
2277
/* Add all found interfaces to interfaces list */
2278
for(int i = 0; i < ret; ++i){
2279
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2280
direntries[i]->d_name);
2283
perror_plus("argz_add");
2284
free(direntries[i]);
2288
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2289
direntries[i]->d_name);
2291
free(direntries[i]);
2298
fprintf_plus(stderr, "Could not find a network interface\n");
2299
exitcode = EXIT_FAILURE;
2304
/* Bring up interfaces which are down, and remove any "none"s */
2306
char *interface = NULL;
2307
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2309
/* If interface name is "none", stop bringing up interfaces.
2310
Also remove all instances of "none" from the list */
2311
if(strcmp(interface, "none") == 0){
2312
argz_delete(&mc.interfaces, &mc.interfaces_size,
2315
while((interface = argz_next(mc.interfaces,
2316
mc.interfaces_size, interface))){
2317
if(strcmp(interface, "none") == 0){
2318
argz_delete(&mc.interfaces, &mc.interfaces_size,
2325
bool interface_was_up = interface_is_up(interface);
2326
errno = bring_up_interface(interface, delay);
2327
if(not interface_was_up){
2329
perror_plus("Failed to bring up interface");
2331
errno = argz_add(&interfaces_to_take_down,
2332
&interfaces_to_take_down_size,
2335
perror_plus("argz_add");
2340
if(debug and (interfaces_to_take_down == NULL)){
2341
fprintf_plus(stderr, "No interfaces were brought up\n");
2345
/* If we only got one interface, explicitly use only that one */
2346
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
2348
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2351
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
2055
ret = init_gnutls_global(pubkey, seckey);
2358
ret = init_gnutls_global(pubkey, seckey, &mc);
2057
2360
fprintf_plus(stderr, "init_gnutls_global failed\n");
2058
2361
exitcode = EX_UNAVAILABLE;
2250
2564
mc.current_server->prev->next = NULL;
2251
2565
while(mc.current_server != NULL){
2252
2566
server *next = mc.current_server->next;
2568
#pragma GCC diagnostic push
2569
#pragma GCC diagnostic ignored "-Wcast-qual"
2571
free((char *)(mc.current_server->ip));
2573
#pragma GCC diagnostic pop
2253
2575
free(mc.current_server);
2254
2576
mc.current_server = next;
2258
/* Run network hooks */
2259
run_network_hooks("stop", interface, delay);
2261
/* Re-raise priviliges */
2580
/* Re-raise privileges */
2582
ret_errno = raise_privileges();
2585
perror_plus("Failed to raise privileges");
2588
/* Run network hooks */
2589
run_network_hooks("stop", interfaces_hooks != NULL ?
2590
interfaces_hooks : "", delay);
2592
/* Take down the network interfaces which were brought up */
2594
char *interface = NULL;
2595
while((interface=argz_next(interfaces_to_take_down,
2596
interfaces_to_take_down_size,
2598
ret_errno = take_down_interface(interface);
2601
perror_plus("Failed to take down interface");
2604
if(debug and (interfaces_to_take_down == NULL)){
2605
fprintf_plus(stderr, "No interfaces needed to be taken"
2265
/* Take down the network interface */
2266
if(take_down_interface and geteuid() == 0){
2267
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2269
perror_plus("ioctl SIOCGIFFLAGS");
2270
} else if(network.ifr_flags & IFF_UP){
2271
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2272
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2274
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
2277
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2279
perror_plus("close");
2611
ret_errno = lower_privileges_permanently();
2614
perror_plus("Failed to lower privileges permanently");
2283
/* Lower privileges permanently */
2287
perror_plus("setuid");
2618
free(interfaces_to_take_down);
2619
free(interfaces_hooks);
2290
2621
/* Removes the GPGME temp directory and all files inside */
2291
if(tempdir_created){
2622
if(tempdir != NULL){
2292
2623
struct dirent **direntries = NULL;
2293
struct dirent *direntry = NULL;
2294
int numentries = scandir(tempdir, &direntries, notdotentries,
2296
if (numentries > 0){
2297
for(int i = 0; i < numentries; i++){
2298
direntry = direntries[i];
2299
char *fullname = NULL;
2300
ret = asprintf(&fullname, "%s/%s", tempdir,
2303
perror_plus("asprintf");
2306
ret = remove(fullname);
2308
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2624
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY |
2626
if(tempdir_fd == -1){
2627
perror_plus("open");
2630
#if __GLIBC_PREREQ(2, 15)
2631
int numentries = scandirat(tempdir_fd, ".", &direntries,
2632
notdotentries, alphasort);
2633
#else /* not __GLIBC_PREREQ(2, 15) */
2634
int numentries = scandir(tempdir, &direntries, notdotentries,
2636
#endif /* not __GLIBC_PREREQ(2, 15) */
2637
#else /* not __GLIBC__ */
2638
int numentries = scandir(tempdir, &direntries, notdotentries,
2640
#endif /* not __GLIBC__ */
2641
if(numentries >= 0){
2642
for(int i = 0; i < numentries; i++){
2643
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
2645
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
2646
" \"%s\", 0): %s\n", tempdir,
2647
direntries[i]->d_name, strerror(errno));
2649
free(direntries[i]);
2652
/* need to clean even if 0 because man page doesn't specify */
2654
if(numentries == -1){
2655
perror_plus("scandir");
2657
ret = rmdir(tempdir);
2658
if(ret == -1 and errno != ENOENT){
2659
perror_plus("rmdir");
2315
/* need to clean even if 0 because man page doesn't specify */
2317
if (numentries == -1){
2318
perror_plus("scandir");
2320
ret = rmdir(tempdir);
2321
if(ret == -1 and errno != ENOENT){
2322
perror_plus("rmdir");
2662
TEMP_FAILURE_RETRY(close(tempdir_fd));