728
790
if(if_indextoname((unsigned int)if_index, interface) == NULL){
729
791
perror_plus("if_indextoname");
731
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
732
"\n", ip, interface, port);
793
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIuMAX
794
"\n", ip, interface, (uintmax_t)port);
735
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
797
fprintf_plus(stderr, "Connection to: %s, port %" PRIuMAX "\n",
798
ip, (uintmax_t)port);
738
800
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
739
801
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
741
802
if(af == AF_INET6){
742
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,
745
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,
749
perror_plus("inet_ntop");
751
if(strcmp(addrstr, ip) != 0){
752
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);
1369
1455
ret = avahi_simple_poll_iterate(s, (int)block_time);
1372
if (ret > 0 or errno != EINTR){
1458
if(ret > 0 or errno != EINTR){
1373
1459
return (ret != 1) ? ret : 0;
1379
bool run_network_hooks(const char *mode, const char *interface,
1465
/* Set effective uid to 0, return errno */
1466
__attribute__((warn_unused_result))
1467
error_t raise_privileges(void){
1468
error_t old_errno = errno;
1469
error_t ret_errno = 0;
1470
if(seteuid(0) == -1){
1477
/* Set effective and real user ID to 0. Return errno. */
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();
1486
if(setuid(0) == -1){
1493
/* Set effective user ID to unprivileged saved user ID */
1494
__attribute__((warn_unused_result))
1495
error_t lower_privileges(void){
1496
error_t old_errno = errno;
1497
error_t ret_errno = 0;
1498
if(seteuid(uid) == -1){
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,
1380
1519
const float delay){
1381
struct dirent **direntries;
1382
struct dirent *direntry;
1384
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__ */
1386
1547
if(numhooks == -1){
1387
1548
perror_plus("scandir");
1389
int devnull = open("/dev/null", O_RDONLY);
1390
for(int i = 0; i < numhooks; i++){
1391
direntry = direntries[i];
1392
char *fullname = NULL;
1393
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);
1395
1621
perror_plus("asprintf");
1399
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1402
pid_t hook_pid = fork();
1405
dup2(devnull, STDIN_FILENO);
1407
dup2(STDERR_FILENO, STDOUT_FILENO);
1408
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1410
perror_plus("setenv");
1413
ret = setenv("DEVICE", interface, 1);
1415
perror_plus("setenv");
1418
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1420
perror_plus("setenv");
1423
ret = setenv("MODE", mode, 1);
1425
perror_plus("setenv");
1429
ret = asprintf(&delaystring, "%f", delay);
1431
perror_plus("asprintf");
1434
ret = setenv("DELAY", delaystring, 1);
1437
perror_plus("setenv");
1624
ret = setenv("DELAY", delaystring, 1);
1440
1626
free(delaystring);
1441
ret = execl(fullname, direntry->d_name, mode, NULL);
1442
perror_plus("execl");
1445
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1446
perror_plus("waitpid");
1450
if(WIFEXITED(status)){
1451
if(WEXITSTATUS(status) != 0){
1452
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1453
" with status %d\n", direntry->d_name,
1454
WEXITSTATUS(status));
1458
} else if(WIFSIGNALED(status)){
1459
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1460
" signal %d\n", direntry->d_name,
1465
fprintf_plus(stderr, "Warning: network hook \"%s\""
1466
" crashed\n", direntry->d_name);
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,
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");
1695
__attribute__((nonnull, warn_unused_result))
1696
error_t bring_up_interface(const char *const interface,
1698
error_t old_errno = errno;
1700
struct ifreq network;
1701
unsigned int if_index = if_nametoindex(interface);
1703
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
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;
1796
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1801
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1805
/* Sleep checking until interface is running.
1806
Check every 0.25s, up to total time of delay */
1807
for(int i=0; i < delay * 4; i++){
1808
if(interface_is_running(interface)){
1811
struct timespec sleeptime = { .tv_nsec = 250000000 };
1812
ret = nanosleep(&sleeptime, NULL);
1813
if(ret == -1 and errno != EINTR){
1814
perror_plus("nanosleep");
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);
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));
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",
1481
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 };
1482
1902
AvahiSServiceBrowser *sb = NULL;
1485
1905
intmax_t tmpmax;
1487
1907
int exitcode = EXIT_SUCCESS;
1488
const char *interface = "";
1489
struct ifreq network;
1491
bool take_down_interface = false;
1494
char tempdir[] = "/tmp/mandosXXXXXX";
1495
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;
1496
1913
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1497
1914
const char *seckey = PATHDIR "/" SECKEY;
1498
1915
const char *pubkey = PATHDIR "/" PUBKEY;
1916
char *interfaces_hooks = NULL;
1500
1918
bool gnutls_initialized = false;
1501
1919
bool gpgme_initialized = false;
1677
2097
/* Work around Debian bug #633582:
1678
2098
<http://bugs.debian.org/633582> */
1681
/* Re-raise priviliges */
1685
perror_plus("seteuid");
1688
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1689
int seckey_fd = open(seckey, O_RDONLY);
1690
if(seckey_fd == -1){
1691
perror_plus("open");
1693
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1695
perror_plus("fstat");
1697
if(S_ISREG(st.st_mode)
1698
and st.st_uid == 0 and st.st_gid == 0){
1699
ret = fchown(seckey_fd, uid, gid);
1701
perror_plus("fchown");
1705
TEMP_FAILURE_RETRY(close(seckey_fd));
1709
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1710
int pubkey_fd = open(pubkey, O_RDONLY);
1711
if(pubkey_fd == -1){
1712
perror_plus("open");
1714
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1716
perror_plus("fstat");
1718
if(S_ISREG(st.st_mode)
1719
and st.st_uid == 0 and st.st_gid == 0){
1720
ret = fchown(pubkey_fd, uid, gid);
1722
perror_plus("fchown");
1726
TEMP_FAILURE_RETRY(close(pubkey_fd));
1730
/* Lower privileges */
1734
perror_plus("seteuid");
2100
/* Re-raise privileges */
2101
ret_errno = raise_privileges();
2104
perror_plus("Failed to raise privileges");
2108
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2109
int seckey_fd = open(seckey, O_RDONLY);
2110
if(seckey_fd == -1){
2111
perror_plus("open");
2113
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
2115
perror_plus("fstat");
2117
if(S_ISREG(st.st_mode)
2118
and st.st_uid == 0 and st.st_gid == 0){
2119
ret = fchown(seckey_fd, uid, gid);
2121
perror_plus("fchown");
2125
TEMP_FAILURE_RETRY(close(seckey_fd));
2129
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
2130
int pubkey_fd = open(pubkey, O_RDONLY);
2131
if(pubkey_fd == -1){
2132
perror_plus("open");
2134
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
2136
perror_plus("fstat");
2138
if(S_ISREG(st.st_mode)
2139
and st.st_uid == 0 and st.st_gid == 0){
2140
ret = fchown(pubkey_fd, uid, gid);
2142
perror_plus("fchown");
2146
TEMP_FAILURE_RETRY(close(pubkey_fd));
2150
/* Lower privileges */
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);
1738
2176
/* Run network hooks */
1741
/* Re-raise priviliges */
1745
perror_plus("seteuid");
1748
if(not run_network_hooks("start", interface, delay)){
1752
/* Lower privileges */
1756
perror_plus("seteuid");
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);
1762
2192
avahi_set_log_function(empty_log);
1765
if(interface[0] == '\0'){
1766
struct dirent **direntries;
1767
/* First look for interfaces that are up */
1768
ret = scandir(sys_class_net, &direntries, up_interface,
1771
/* No up interfaces, look for any good interfaces */
1773
ret = scandir(sys_class_net, &direntries, good_interface,
1777
/* Pick the first interface returned */
1778
interface = strdup(direntries[0]->d_name);
1780
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1782
if(interface == NULL){
1783
perror_plus("malloc");
1785
exitcode = EXIT_FAILURE;
1791
fprintf_plus(stderr, "Could not find a network interface\n");
1792
exitcode = EXIT_FAILURE;
1797
2195
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1798
2196
from the signal handler */
1799
2197
/* Initialize the pseudo-RNG for Avahi */
1800
2198
srand((unsigned int) time(NULL));
1801
mc.simple_poll = avahi_simple_poll_new();
1802
if(mc.simple_poll == NULL){
2199
simple_poll = avahi_simple_poll_new();
2200
if(simple_poll == NULL){
1803
2201
fprintf_plus(stderr,
1804
2202
"Avahi: Failed to create simple poll object.\n");
1805
2203
exitcode = EX_UNAVAILABLE;
1872
/* If the interface is down, bring it up */
1873
if(strcmp(interface, "none") != 0){
1874
if_index = (AvahiIfIndex) if_nametoindex(interface);
1876
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1877
exitcode = EX_UNAVAILABLE;
1885
/* Re-raise priviliges */
1889
perror_plus("seteuid");
1893
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1894
messages about the network interface to mess up the prompt */
1895
ret = klogctl(8, NULL, 5);
1896
bool restore_loglevel = true;
1898
restore_loglevel = false;
1899
perror_plus("klogctl");
1901
#endif /* __linux__ */
1903
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1905
perror_plus("socket");
1906
exitcode = EX_OSERR;
1908
if(restore_loglevel){
1909
ret = klogctl(7, NULL, 0);
1911
perror_plus("klogctl");
1914
#endif /* __linux__ */
1915
/* Lower privileges */
1919
perror_plus("seteuid");
1923
strcpy(network.ifr_name, interface);
1924
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1926
perror_plus("ioctl SIOCGIFFLAGS");
1928
if(restore_loglevel){
1929
ret = klogctl(7, NULL, 0);
1931
perror_plus("klogctl");
1934
#endif /* __linux__ */
1935
exitcode = EX_OSERR;
1936
/* Lower privileges */
1940
perror_plus("seteuid");
1944
if((network.ifr_flags & IFF_UP) == 0){
1945
network.ifr_flags |= IFF_UP;
1946
take_down_interface = true;
1947
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1949
take_down_interface = false;
1950
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1951
exitcode = EX_OSERR;
1953
if(restore_loglevel){
1954
ret = klogctl(7, NULL, 0);
1956
perror_plus("klogctl");
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,
1959
#endif /* __linux__ */
1960
/* Lower privileges */
1964
perror_plus("seteuid");
1969
/* Sleep checking until interface is running.
1970
Check every 0.25s, up to total time of delay */
1971
for(int i=0; i < delay * 4; i++){
1972
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1974
perror_plus("ioctl SIOCGIFFLAGS");
1975
} else if(network.ifr_flags & IFF_RUNNING){
1978
struct timespec sleeptime = { .tv_nsec = 250000000 };
1979
ret = nanosleep(&sleeptime, NULL);
1980
if(ret == -1 and errno != EINTR){
1981
perror_plus("nanosleep");
1984
if(not take_down_interface){
1985
/* We won't need the socket anymore */
1986
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1988
perror_plus("close");
1992
if(restore_loglevel){
1993
/* Restores kernel loglevel to default */
1994
ret = klogctl(7, NULL, 0);
1996
perror_plus("klogctl");
1999
#endif /* __linux__ */
2000
/* Lower privileges */
2002
/* Lower privileges */
2005
perror_plus("seteuid");
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);
2013
ret = init_gnutls_global(pubkey, seckey);
2358
ret = init_gnutls_global(pubkey, seckey, &mc);
2015
2360
fprintf_plus(stderr, "init_gnutls_global failed\n");
2016
2361
exitcode = EX_UNAVAILABLE;
2200
2557
if(gpgme_initialized){
2201
2558
gpgme_release(mc.ctx);
2204
2561
/* Cleans up the circular linked list of Mandos servers the client
2206
2563
if(mc.current_server != NULL){
2207
2564
mc.current_server->prev->next = NULL;
2208
2565
while(mc.current_server != NULL){
2209
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
2210
2575
free(mc.current_server);
2211
2576
mc.current_server = next;
2215
/* Re-raise priviliges */
2580
/* Re-raise privileges */
2221
perror_plus("seteuid");
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"
2224
/* Run network hooks */
2225
if(not run_network_hooks("stop", interface, delay)){
2229
/* Take down the network interface */
2230
if(take_down_interface and geteuid() == 0){
2231
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2233
perror_plus("ioctl SIOCGIFFLAGS");
2234
} else if(network.ifr_flags & IFF_UP){
2235
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2236
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2238
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
2241
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2243
perror_plus("close");
2248
/* Lower privileges permanently */
2252
perror_plus("setuid");
2611
ret_errno = lower_privileges_permanently();
2614
perror_plus("Failed to lower privileges permanently");
2618
free(interfaces_to_take_down);
2619
free(interfaces_hooks);
2256
2621
/* Removes the GPGME temp directory and all files inside */
2257
if(tempdir_created){
2622
if(tempdir != NULL){
2258
2623
struct dirent **direntries = NULL;
2259
struct dirent *direntry = NULL;
2260
int numentries = scandir(tempdir, &direntries, notdotentries,
2262
if (numentries > 0){
2263
for(int i = 0; i < numentries; i++){
2264
direntry = direntries[i];
2265
char *fullname = NULL;
2266
ret = asprintf(&fullname, "%s/%s", tempdir,
2269
perror_plus("asprintf");
2272
ret = remove(fullname);
2274
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");
2281
/* need to clean even if 0 because man page doesn't specify */
2283
if (numentries == -1){
2284
perror_plus("scandir");
2286
ret = rmdir(tempdir);
2287
if(ret == -1 and errno != ENOENT){
2288
perror_plus("rmdir");
2662
TEMP_FAILURE_RETRY(close(tempdir_fd));