161
156
const char *priority;
163
158
server *current_server;
165
size_t interfaces_size;
166
159
} mandos_context;
168
/* global so signal handler can reach it*/
169
AvahiSimplePoll *simple_poll;
161
/* global context so signal handler can reach it*/
162
mandos_context mc = { .simple_poll = NULL, .server = NULL,
163
.dh_bits = 1024, .priority = "SECURE256"
164
":!CTYPE-X.509:+CTYPE-OPENPGP",
165
.current_server = NULL };
171
167
sig_atomic_t quit_now = 0;
172
168
int signal_received = 0;
174
170
/* Function to use when printing errors */
175
171
void perror_plus(const char *print_text){
177
172
fprintf(stderr, "Mandos plugin %s: ",
178
173
program_invocation_short_name);
180
174
perror(print_text);
183
__attribute__((format (gnu_printf, 2, 3)))
184
177
int fprintf_plus(FILE *stream, const char *format, ...){
186
179
va_start (ap, format);
188
181
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
189
182
program_invocation_short_name));
190
return (int)TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
183
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
223
216
if(new_server->ip == NULL){
224
217
perror_plus("strdup");
227
220
/* Special case of first server */
228
if(*current_server == NULL){
221
if (mc.current_server == NULL){
229
222
new_server->next = new_server;
230
223
new_server->prev = new_server;
231
*current_server = new_server;
224
mc.current_server = new_server;
232
225
/* Place the new server last in the list */
234
new_server->next = *current_server;
235
new_server->prev = (*current_server)->prev;
227
new_server->next = mc.current_server;
228
new_server->prev = mc.current_server->prev;
236
229
new_server->prev->next = new_server;
237
(*current_server)->prev = new_server;
230
mc.current_server->prev = new_server;
239
ret = clock_gettime(CLOCK_MONOTONIC, &(*current_server)->last_seen);
232
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
241
234
perror_plus("clock_gettime");
248
241
* Initialize GPGME.
250
243
static bool init_gpgme(const char *seckey, const char *pubkey,
251
const char *tempdir, mandos_context *mc){
244
const char *tempdir){
252
245
gpgme_error_t rc;
253
246
gpgme_engine_info_t engine_info;
256
250
* Helper function to insert pub and seckey to the engine keyring.
535
528
/* GnuTLS server initialization */
536
ret = gnutls_dh_params_init(&mc->dh_params);
529
ret = gnutls_dh_params_init(&mc.dh_params);
537
530
if(ret != GNUTLS_E_SUCCESS){
538
531
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
539
532
" initialization: %s\n",
540
533
safer_gnutls_strerror(ret));
543
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
536
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
544
537
if(ret != GNUTLS_E_SUCCESS){
545
538
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
546
539
safer_gnutls_strerror(ret));
550
gnutls_certificate_set_dh_params(mc->cred, mc->dh_params);
543
gnutls_certificate_set_dh_params(mc.cred, mc.dh_params);
556
gnutls_certificate_free_credentials(mc->cred);
549
gnutls_certificate_free_credentials(mc.cred);
557
550
gnutls_global_deinit();
558
gnutls_dh_params_deinit(mc->dh_params);
551
gnutls_dh_params_deinit(mc.dh_params);
562
static int init_gnutls_session(gnutls_session_t *session,
555
static int init_gnutls_session(gnutls_session_t *session){
565
557
/* GnuTLS session creation */
662
/* If the interface is specified and we have a list of interfaces */
663
if(if_index != AVAHI_IF_UNSPEC and mc->interfaces != NULL){
664
/* Check if the interface is one of the interfaces we are using */
667
char *interface = NULL;
668
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
670
if(if_nametoindex(interface) == (unsigned int)if_index){
677
/* This interface does not match any in the list, so we don't
678
connect to the server */
680
char interface[IF_NAMESIZE];
681
if(if_indextoname((unsigned int)if_index, interface) == NULL){
682
perror_plus("if_indextoname");
684
fprintf_plus(stderr, "Skipping server on non-used interface"
686
if_indextoname((unsigned int)if_index,
694
ret = init_gnutls_session(&session, mc);
654
ret = init_gnutls_session(&session);
700
660
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
701
PRIuMAX "\n", ip, (uintmax_t)port);
661
PRIu16 "\n", ip, port);
704
664
tcp_sd = socket(pf, SOCK_STREAM, 0);
765
728
if(if_indextoname((unsigned int)if_index, interface) == NULL){
766
729
perror_plus("if_indextoname");
768
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIuMAX
769
"\n", ip, interface, (uintmax_t)port);
731
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
732
"\n", ip, interface, port);
772
fprintf_plus(stderr, "Connection to: %s, port %" PRIuMAX "\n",
773
ip, (uintmax_t)port);
735
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
775
738
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
776
739
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
1067
1024
PRIdMAX ") on port %" PRIu16 "\n", name,
1068
1025
host_name, ip, (intmax_t)interface, port);
1070
int ret = start_mandos_communication(ip, (in_port_t)port,
1072
avahi_proto_to_af(proto),
1027
int ret = start_mandos_communication(ip, port, interface,
1028
avahi_proto_to_af(proto));
1075
avahi_simple_poll_quit(simple_poll);
1030
avahi_simple_poll_quit(mc.simple_poll);
1077
if(not add_server(ip, (in_port_t)port, interface,
1078
avahi_proto_to_af(proto),
1079
&((mandos_context*)mc)->current_server)){
1080
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1032
ret = add_server(ip, port, interface,
1033
avahi_proto_to_af(proto));
1123
1071
the callback function is called the Avahi server will free the
1124
1072
resolver for us. */
1126
if(avahi_s_service_resolver_new(((mandos_context*)mc)->server,
1127
interface, protocol, name, type,
1128
domain, protocol, 0,
1129
resolve_callback, mc) == NULL)
1074
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1075
name, type, domain, protocol, 0,
1076
resolve_callback, NULL) == NULL)
1130
1077
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1132
avahi_strerror(avahi_server_errno
1133
(((mandos_context*)mc)->server)));
1079
avahi_strerror(avahi_server_errno(mc.server)));
1136
1082
case AVAHI_BROWSER_REMOVE:
1256
* This function determines if a network interface is up.
1258
bool interface_is_up(const char *interface){
1260
if(not get_flags(interface, &ifr)){
1262
fprintf_plus(stderr, "Failed to get flags for interface "
1263
"\"%s\"\n", interface);
1268
return (bool)(ifr.ifr_flags & IFF_UP);
1272
* This function determines if a network interface is running
1274
bool interface_is_running(const char *interface){
1276
if(not get_flags(interface, &ifr)){
1278
fprintf_plus(stderr, "Failed to get flags for interface "
1279
"\"%s\"\n", interface);
1284
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1197
* This function determines if a directory entry in /sys/class/net
1198
* corresponds to an acceptable network device which is up.
1199
* (This function is passed to scandir(3) as a filter function.)
1201
int up_interface(const struct dirent *if_entry){
1202
if(if_entry->d_name[0] == '.'){
1207
if(not get_flags(if_entry->d_name, &ifr)){
1209
fprintf_plus(stderr, "Failed to get flags for interface "
1210
"\"%s\"\n", if_entry->d_name);
1215
/* Reject down interfaces */
1216
if(not (ifr.ifr_flags & IFF_UP)){
1218
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1224
/* Reject non-running interfaces */
1225
if(not (ifr.ifr_flags & IFF_RUNNING)){
1227
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1233
if(not good_flags(if_entry->d_name, &ifr)){
1287
1239
int notdotentries(const struct dirent *direntry){
1402
1349
if(block_time <= 0){
1403
ret = start_mandos_communication(mc->current_server->ip,
1404
mc->current_server->port,
1405
mc->current_server->if_index,
1406
mc->current_server->af, mc);
1350
ret = start_mandos_communication(mc.current_server->ip,
1351
mc.current_server->port,
1352
mc.current_server->if_index,
1353
mc.current_server->af);
1408
avahi_simple_poll_quit(s);
1355
avahi_simple_poll_quit(mc.simple_poll);
1411
1358
ret = clock_gettime(CLOCK_MONOTONIC,
1412
&mc->current_server->last_seen);
1359
&mc.current_server->last_seen);
1414
1361
perror_plus("clock_gettime");
1417
mc->current_server = mc->current_server->next;
1364
mc.current_server = mc.current_server->next;
1418
1365
block_time = 0; /* Call avahi to find new Mandos
1419
1366
servers, but don't block */
1489
1384
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1491
1386
if(numhooks == -1){
1492
if(errno == ENOENT){
1494
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1495
" found\n", hookdir);
1498
perror_plus("scandir");
1387
perror_plus("scandir");
1501
1389
int devnull = open("/dev/null", O_RDONLY);
1502
1390
for(int i = 0; i < numhooks; i++){
1503
direntry = direntries[i];
1391
direntry = direntries[0];
1504
1392
char *fullname = NULL;
1505
1393
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1507
1395
perror_plus("asprintf");
1511
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1514
1398
pid_t hook_pid = fork();
1515
1399
if(hook_pid == 0){
1517
/* Raise privileges */
1518
raise_privileges_permanently();
1523
perror_plus("setgid");
1525
/* Reset supplementary groups */
1527
ret = setgroups(0, NULL);
1529
perror_plus("setgroups");
1531
1401
dup2(devnull, STDIN_FILENO);
1532
1402
close(devnull);
1533
1403
dup2(STDERR_FILENO, STDOUT_FILENO);
1534
1404
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1536
1406
perror_plus("setenv");
1539
1409
ret = setenv("DEVICE", interface, 1);
1541
1411
perror_plus("setenv");
1544
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1414
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1546
1416
perror_plus("setenv");
1549
1419
ret = setenv("MODE", mode, 1);
1551
1421
perror_plus("setenv");
1554
1424
char *delaystring;
1555
1425
ret = asprintf(&delaystring, "%f", delay);
1557
1427
perror_plus("asprintf");
1560
1430
ret = setenv("DELAY", delaystring, 1);
1562
1432
free(delaystring);
1563
1433
perror_plus("setenv");
1566
1436
free(delaystring);
1567
if(connect_to != NULL){
1568
ret = setenv("CONNECT", connect_to, 1);
1570
perror_plus("setenv");
1574
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1575
perror_plus("execl");
1576
_exit(EXIT_FAILURE);
1437
ret = execl(fullname, direntry->d_name, mode, NULL);
1438
perror_plus("execl");
1580
1441
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1617
error_t bring_up_interface(const char *const interface,
1620
error_t old_errno = errno;
1621
error_t ret_errno = 0;
1622
int ret, ret_setflags;
1623
struct ifreq network;
1624
unsigned int if_index = if_nametoindex(interface);
1626
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1636
if(not interface_is_up(interface)){
1637
if(not get_flags(interface, &network) and debug){
1639
fprintf_plus(stderr, "Failed to get flags for interface "
1640
"\"%s\"\n", interface);
1643
network.ifr_flags |= IFF_UP;
1645
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1648
perror_plus("socket");
1660
fprintf_plus(stderr, "Bringing up interface \"%s\"\n",
1664
/* Raise priviliges */
1668
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1669
messages about the network interface to mess up the prompt */
1670
int ret_linux = klogctl(8, NULL, 5);
1671
bool restore_loglevel = true;
1672
if(ret_linux == -1){
1673
restore_loglevel = false;
1674
perror_plus("klogctl");
1676
#endif /* __linux__ */
1677
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1680
if(restore_loglevel){
1681
ret_linux = klogctl(7, NULL, 0);
1682
if(ret_linux == -1){
1683
perror_plus("klogctl");
1686
#endif /* __linux__ */
1688
/* Lower privileges */
1691
/* Close the socket */
1692
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1694
perror_plus("close");
1697
if(ret_setflags == -1){
1699
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1704
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1708
/* Sleep checking until interface is running.
1709
Check every 0.25s, up to total time of delay */
1710
for(int i=0; i < delay * 4; i++){
1711
if(interface_is_running(interface)){
1714
struct timespec sleeptime = { .tv_nsec = 250000000 };
1715
ret = nanosleep(&sleeptime, NULL);
1716
if(ret == -1 and errno != EINTR){
1717
perror_plus("nanosleep");
1725
error_t take_down_interface(const char *const interface){
1727
error_t old_errno = errno;
1728
error_t ret_errno = 0;
1729
int ret, ret_setflags;
1730
struct ifreq network;
1731
unsigned int if_index = if_nametoindex(interface);
1733
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1737
if(interface_is_up(interface)){
1738
if(not get_flags(interface, &network) and debug){
1740
fprintf_plus(stderr, "Failed to get flags for interface "
1741
"\"%s\"\n", interface);
1744
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1746
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1749
perror_plus("socket");
1755
fprintf_plus(stderr, "Taking down interface \"%s\"\n",
1759
/* Raise priviliges */
1762
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1765
/* Lower privileges */
1768
/* Close the socket */
1769
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1771
perror_plus("close");
1774
if(ret_setflags == -1){
1776
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1781
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1789
1477
int main(int argc, char *argv[]){
1790
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1791
.priority = "SECURE256:!CTYPE-X.509:"
1792
"+CTYPE-OPENPGP", .current_server = NULL,
1793
.interfaces = NULL, .interfaces_size = 0 };
1794
1478
AvahiSServiceBrowser *sb = NULL;
1797
1481
intmax_t tmpmax;
1799
1483
int exitcode = EXIT_SUCCESS;
1800
char *interfaces_to_take_down = NULL;
1801
size_t interfaces_to_take_down_size = 0;
1484
const char *interface = "";
1485
struct ifreq network;
1487
bool take_down_interface = false;
1802
1490
char tempdir[] = "/tmp/mandosXXXXXX";
1803
1491
bool tempdir_created = false;
1804
1492
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1805
1493
const char *seckey = PATHDIR "/" SECKEY;
1806
1494
const char *pubkey = PATHDIR "/" PUBKEY;
1807
char *interfaces_hooks = NULL;
1808
size_t interfaces_hooks_size = 0;
1810
1496
bool gnutls_initialized = false;
1811
1497
bool gpgme_initialized = false;
1989
1673
/* Work around Debian bug #633582:
1990
1674
<http://bugs.debian.org/633582> */
1992
1677
/* Re-raise priviliges */
1993
if(raise_privileges() == 0){
1996
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1997
int seckey_fd = open(seckey, O_RDONLY);
1998
if(seckey_fd == -1){
1999
perror_plus("open");
2001
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
2003
perror_plus("fstat");
2005
if(S_ISREG(st.st_mode)
2006
and st.st_uid == 0 and st.st_gid == 0){
2007
ret = fchown(seckey_fd, uid, gid);
2009
perror_plus("fchown");
2013
TEMP_FAILURE_RETRY(close(seckey_fd));
2017
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
2018
int pubkey_fd = open(pubkey, O_RDONLY);
2019
if(pubkey_fd == -1){
2020
perror_plus("open");
2022
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
2024
perror_plus("fstat");
2026
if(S_ISREG(st.st_mode)
2027
and st.st_uid == 0 and st.st_gid == 0){
2028
ret = fchown(pubkey_fd, uid, gid);
2030
perror_plus("fchown");
2034
TEMP_FAILURE_RETRY(close(pubkey_fd));
2038
/* Lower privileges */
2043
/* Remove invalid interface names (except "none") */
2045
char *interface = NULL;
2046
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2048
if(strcmp(interface, "none") != 0
2049
and if_nametoindex(interface) == 0){
2050
if(interface[0] != '\0'){
2051
fprintf_plus(stderr, "Not using nonexisting interface"
2052
" \"%s\"\n", interface);
2054
argz_delete(&mc.interfaces, &mc.interfaces_size, interface);
1681
perror_plus("seteuid");
1684
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1685
int seckey_fd = open(seckey, O_RDONLY);
1686
if(seckey_fd == -1){
1687
perror_plus("open");
1689
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1691
perror_plus("fstat");
1693
if(S_ISREG(st.st_mode)
1694
and st.st_uid == 0 and st.st_gid == 0){
1695
ret = fchown(seckey_fd, uid, gid);
1697
perror_plus("fchown");
1701
TEMP_FAILURE_RETRY(close(seckey_fd));
1705
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1706
int pubkey_fd = open(pubkey, O_RDONLY);
1707
if(pubkey_fd == -1){
1708
perror_plus("open");
1710
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1712
perror_plus("fstat");
1714
if(S_ISREG(st.st_mode)
1715
and st.st_uid == 0 and st.st_gid == 0){
1716
ret = fchown(pubkey_fd, uid, gid);
1718
perror_plus("fchown");
1722
TEMP_FAILURE_RETRY(close(pubkey_fd));
1726
/* Lower privileges */
1730
perror_plus("seteuid");
2060
1734
/* Run network hooks */
2062
if(mc.interfaces != NULL){
2063
interfaces_hooks = malloc(mc.interfaces_size);
2064
if(interfaces_hooks == NULL){
2065
perror_plus("malloc");
2068
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2069
interfaces_hooks_size = mc.interfaces_size;
2070
argz_stringify(interfaces_hooks, interfaces_hooks_size,
1736
/* Re-raise priviliges */
1740
perror_plus("seteuid");
2073
if(not run_network_hooks("start", interfaces_hooks != NULL ?
2074
interfaces_hooks : "", delay)){
1742
if(not run_network_hooks("start", interface, delay)){
1745
/* Lower privileges */
1749
perror_plus("seteuid");
2080
1754
avahi_set_log_function(empty_log);
1757
if(interface[0] == '\0'){
1758
struct dirent **direntries;
1759
/* First look for interfaces that are up */
1760
ret = scandir(sys_class_net, &direntries, up_interface,
1763
/* No up interfaces, look for any good interfaces */
1765
ret = scandir(sys_class_net, &direntries, good_interface,
1769
/* Pick the first interface returned */
1770
interface = strdup(direntries[0]->d_name);
1772
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1774
if(interface == NULL){
1775
perror_plus("malloc");
1777
exitcode = EXIT_FAILURE;
1783
fprintf_plus(stderr, "Could not find a network interface\n");
1784
exitcode = EXIT_FAILURE;
2083
1789
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
2084
1790
from the signal handler */
2085
1791
/* Initialize the pseudo-RNG for Avahi */
2086
1792
srand((unsigned int) time(NULL));
2087
simple_poll = avahi_simple_poll_new();
2088
if(simple_poll == NULL){
1793
mc.simple_poll = avahi_simple_poll_new();
1794
if(mc.simple_poll == NULL){
2089
1795
fprintf_plus(stderr,
2090
1796
"Avahi: Failed to create simple poll object.\n");
2091
1797
exitcode = EX_UNAVAILABLE;
2158
/* If no interfaces were specified, make a list */
2159
if(mc.interfaces == NULL){
2160
struct dirent **direntries;
2161
/* Look for any good interfaces */
2162
ret = scandir(sys_class_net, &direntries, good_interface,
2165
/* Add all found interfaces to interfaces list */
2166
for(int i = 0; i < ret; ++i){
2167
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2168
direntries[i]->d_name);
2170
perror_plus("argz_add");
2174
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2175
direntries[i]->d_name);
2181
fprintf_plus(stderr, "Could not find a network interface\n");
2182
exitcode = EXIT_FAILURE;
2187
/* Bring up interfaces which are down, and remove any "none"s */
2189
char *interface = NULL;
2190
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2192
/* If interface name is "none", stop bringing up interfaces.
2193
Also remove all instances of "none" from the list */
2194
if(strcmp(interface, "none") == 0){
2195
argz_delete(&mc.interfaces, &mc.interfaces_size,
2198
while((interface = argz_next(mc.interfaces,
2199
mc.interfaces_size, interface))){
2200
if(strcmp(interface, "none") == 0){
2201
argz_delete(&mc.interfaces, &mc.interfaces_size,
1864
/* If the interface is down, bring it up */
1865
if(strcmp(interface, "none") != 0){
1866
if_index = (AvahiIfIndex) if_nametoindex(interface);
1868
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1869
exitcode = EX_UNAVAILABLE;
1877
/* Re-raise priviliges */
1881
perror_plus("seteuid");
1885
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1886
messages about the network interface to mess up the prompt */
1887
ret = klogctl(8, NULL, 5);
1888
bool restore_loglevel = true;
1890
restore_loglevel = false;
1891
perror_plus("klogctl");
1893
#endif /* __linux__ */
1895
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1897
perror_plus("socket");
1898
exitcode = EX_OSERR;
1900
if(restore_loglevel){
1901
ret = klogctl(7, NULL, 0);
1903
perror_plus("klogctl");
1906
#endif /* __linux__ */
1907
/* Lower privileges */
1911
perror_plus("seteuid");
1915
strcpy(network.ifr_name, interface);
1916
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1918
perror_plus("ioctl SIOCGIFFLAGS");
1920
if(restore_loglevel){
1921
ret = klogctl(7, NULL, 0);
1923
perror_plus("klogctl");
1926
#endif /* __linux__ */
1927
exitcode = EX_OSERR;
1928
/* Lower privileges */
1932
perror_plus("seteuid");
1936
if((network.ifr_flags & IFF_UP) == 0){
1937
network.ifr_flags |= IFF_UP;
1938
take_down_interface = true;
1939
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1941
take_down_interface = false;
1942
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1943
exitcode = EX_OSERR;
1945
if(restore_loglevel){
1946
ret = klogctl(7, NULL, 0);
1948
perror_plus("klogctl");
1951
#endif /* __linux__ */
1952
/* Lower privileges */
1956
perror_plus("seteuid");
1961
/* Sleep checking until interface is running.
1962
Check every 0.25s, up to total time of delay */
1963
for(int i=0; i < delay * 4; i++){
1964
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1966
perror_plus("ioctl SIOCGIFFLAGS");
1967
} else if(network.ifr_flags & IFF_RUNNING){
2208
bool interface_was_up = interface_is_up(interface);
2209
ret = bring_up_interface(interface, delay);
2210
if(not interface_was_up){
2213
perror_plus("Failed to bring up interface");
2215
ret_errno = argz_add(&interfaces_to_take_down,
2216
&interfaces_to_take_down_size,
2221
if(debug and (interfaces_to_take_down == NULL)){
2222
fprintf_plus(stderr, "No interfaces were brought up\n");
2226
/* If we only got one interface, explicitly use only that one */
2227
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
2229
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2232
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
1970
struct timespec sleeptime = { .tv_nsec = 250000000 };
1971
ret = nanosleep(&sleeptime, NULL);
1972
if(ret == -1 and errno != EINTR){
1973
perror_plus("nanosleep");
1976
if(not take_down_interface){
1977
/* We won't need the socket anymore */
1978
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1980
perror_plus("close");
1984
if(restore_loglevel){
1985
/* Restores kernel loglevel to default */
1986
ret = klogctl(7, NULL, 0);
1988
perror_plus("klogctl");
1991
#endif /* __linux__ */
1992
/* Lower privileges */
1994
/* Lower privileges */
1997
perror_plus("seteuid");
2239
ret = init_gnutls_global(pubkey, seckey, &mc);
2005
ret = init_gnutls_global(pubkey, seckey);
2241
2007
fprintf_plus(stderr, "init_gnutls_global failed\n");
2242
2008
exitcode = EX_UNAVAILABLE;
2445
2207
/* Re-raise priviliges */
2212
perror_plus("seteuid");
2449
2214
/* Run network hooks */
2450
run_network_hooks("stop", interfaces_hooks != NULL ?
2451
interfaces_hooks : "", delay);
2215
if(not run_network_hooks("stop", interface, delay)){
2453
/* Take down the network interfaces which were brought up */
2455
char *interface = NULL;
2456
while((interface=argz_next(interfaces_to_take_down,
2457
interfaces_to_take_down_size,
2459
ret_errno = take_down_interface(interface);
2462
perror_plus("Failed to take down interface");
2219
/* Take down the network interface */
2220
if(take_down_interface and geteuid() == 0){
2221
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2223
perror_plus("ioctl SIOCGIFFLAGS");
2224
} else if(network.ifr_flags & IFF_UP){
2225
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2226
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2228
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
2465
if(debug and (interfaces_to_take_down == NULL)){
2466
fprintf_plus(stderr, "No interfaces needed to be taken"
2231
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2233
perror_plus("close");
2471
lower_privileges_permanently();
2474
free(interfaces_to_take_down);
2475
free(interfaces_hooks);
2237
/* Lower privileges permanently */
2241
perror_plus("setuid");
2477
2244
/* Removes the GPGME temp directory and all files inside */
2478
2245
if(tempdir_created){