263
184
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
269
190
rc = gpgme_data_new_from_fd(&pgp_data, fd);
270
191
if(rc != GPG_ERR_NO_ERROR){
271
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
272
gpgme_strsource(rc), gpgme_strerror(rc));
192
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
193
gpgme_strsource(rc), gpgme_strerror(rc));
276
197
rc = gpgme_op_import(mc.ctx, pgp_data);
277
198
if(rc != GPG_ERR_NO_ERROR){
278
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
279
gpgme_strsource(rc), gpgme_strerror(rc));
199
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
200
gpgme_strsource(rc), gpgme_strerror(rc));
283
204
ret = (int)TEMP_FAILURE_RETRY(close(fd));
285
perror_plus("close");
287
208
gpgme_data_release(pgp_data);
292
fprintf_plus(stderr, "Initializing GPGME\n");
213
fprintf(stderr, "Initializing GPGME\n");
296
217
gpgme_check_version(NULL);
297
218
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
298
219
if(rc != GPG_ERR_NO_ERROR){
299
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
300
gpgme_strsource(rc), gpgme_strerror(rc));
220
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
221
gpgme_strsource(rc), gpgme_strerror(rc));
304
/* Set GPGME home directory for the OpenPGP engine only */
225
/* Set GPGME home directory for the OpenPGP engine only */
305
226
rc = gpgme_get_engine_info(&engine_info);
306
227
if(rc != GPG_ERR_NO_ERROR){
307
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
308
gpgme_strsource(rc), gpgme_strerror(rc));
228
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
229
gpgme_strsource(rc), gpgme_strerror(rc));
311
232
while(engine_info != NULL){
379
297
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
380
298
if(rc != GPG_ERR_NO_ERROR){
381
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
382
gpgme_strsource(rc), gpgme_strerror(rc));
299
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
300
gpgme_strsource(rc), gpgme_strerror(rc));
383
301
plaintext_length = -1;
385
303
gpgme_decrypt_result_t result;
386
304
result = gpgme_op_decrypt_result(mc.ctx);
387
305
if(result == NULL){
388
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
306
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
390
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
391
result->unsupported_algorithm);
392
fprintf_plus(stderr, "Wrong key usage: %u\n",
393
result->wrong_key_usage);
308
fprintf(stderr, "Unsupported algorithm: %s\n",
309
result->unsupported_algorithm);
310
fprintf(stderr, "Wrong key usage: %u\n",
311
result->wrong_key_usage);
394
312
if(result->file_name != NULL){
395
fprintf_plus(stderr, "File name: %s\n", result->file_name);
313
fprintf(stderr, "File name: %s\n", result->file_name);
397
315
gpgme_recipient_t recipient;
398
316
recipient = result->recipients;
399
317
while(recipient != NULL){
400
fprintf_plus(stderr, "Public key algorithm: %s\n",
401
gpgme_pubkey_algo_name
402
(recipient->pubkey_algo));
403
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
404
fprintf_plus(stderr, "Secret key available: %s\n",
405
recipient->status == GPG_ERR_NO_SECKEY
318
fprintf(stderr, "Public key algorithm: %s\n",
319
gpgme_pubkey_algo_name(recipient->pubkey_algo));
320
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
321
fprintf(stderr, "Secret key available: %s\n",
322
recipient->status == GPG_ERR_NO_SECKEY
407
324
recipient = recipient->next;
506
423
/* OpenPGP credentials */
507
ret = gnutls_certificate_allocate_credentials(&mc.cred);
424
gnutls_certificate_allocate_credentials(&mc.cred);
508
425
if(ret != GNUTLS_E_SUCCESS){
509
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
510
safer_gnutls_strerror(ret));
426
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
430
safer_gnutls_strerror(ret));
511
431
gnutls_global_deinit();
516
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
517
" secret key %s as GnuTLS credentials\n",
436
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
437
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
522
441
ret = gnutls_certificate_set_openpgp_key_file
523
442
(mc.cred, pubkeyfilename, seckeyfilename,
524
443
GNUTLS_OPENPGP_FMT_BASE64);
525
444
if(ret != GNUTLS_E_SUCCESS){
527
"Error[%d] while reading the OpenPGP key pair ('%s',"
528
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
529
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
530
safer_gnutls_strerror(ret));
446
"Error[%d] while reading the OpenPGP key pair ('%s',"
447
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
448
fprintf(stderr, "The GnuTLS error is: %s\n",
449
safer_gnutls_strerror(ret));
534
453
/* GnuTLS server initialization */
535
454
ret = gnutls_dh_params_init(&mc.dh_params);
536
455
if(ret != GNUTLS_E_SUCCESS){
537
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
538
" initialization: %s\n",
539
safer_gnutls_strerror(ret));
456
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
457
" %s\n", safer_gnutls_strerror(ret));
542
460
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
543
461
if(ret != GNUTLS_E_SUCCESS){
544
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
545
safer_gnutls_strerror(ret));
462
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
463
safer_gnutls_strerror(ret));
1113
1015
signal_received = sig;
1114
1016
int old_errno = errno;
1115
/* set main loop to exit */
1116
1017
if(mc.simple_poll != NULL){
1117
1018
avahi_simple_poll_quit(mc.simple_poll);
1119
1020
errno = old_errno;
1122
bool get_flags(const char *ifname, struct ifreq *ifr){
1125
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1127
perror_plus("socket");
1130
strcpy(ifr->ifr_name, ifname);
1131
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1134
perror_plus("ioctl SIOCGIFFLAGS");
1141
bool good_flags(const char *ifname, const struct ifreq *ifr){
1143
/* Reject the loopback device */
1144
if(ifr->ifr_flags & IFF_LOOPBACK){
1146
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1151
/* Accept point-to-point devices only if connect_to is specified */
1152
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1154
fprintf_plus(stderr, "Accepting point-to-point interface"
1155
" \"%s\"\n", ifname);
1159
/* Otherwise, reject non-broadcast-capable devices */
1160
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1162
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1163
" \"%s\"\n", ifname);
1167
/* Reject non-ARP interfaces (including dummy interfaces) */
1168
if(ifr->ifr_flags & IFF_NOARP){
1170
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1176
/* Accept this device */
1178
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1184
* This function determines if a directory entry in /sys/class/net
1185
* corresponds to an acceptable network device.
1186
* (This function is passed to scandir(3) as a filter function.)
1188
int good_interface(const struct dirent *if_entry){
1189
if(if_entry->d_name[0] == '.'){
1194
if(not get_flags(if_entry->d_name, &ifr)){
1196
fprintf_plus(stderr, "Failed to get flags for interface "
1197
"\"%s\"\n", if_entry->d_name);
1202
if(not good_flags(if_entry->d_name, &ifr)){
1209
* This function determines if a directory entry in /sys/class/net
1210
* corresponds to an acceptable network device which is up.
1211
* (This function is passed to scandir(3) as a filter function.)
1213
int up_interface(const struct dirent *if_entry){
1214
if(if_entry->d_name[0] == '.'){
1219
if(not get_flags(if_entry->d_name, &ifr)){
1221
fprintf_plus(stderr, "Failed to get flags for interface "
1222
"\"%s\"\n", if_entry->d_name);
1227
/* Reject down interfaces */
1228
if(not (ifr.ifr_flags & IFF_UP)){
1230
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1236
/* Reject non-running interfaces */
1237
if(not (ifr.ifr_flags & IFF_RUNNING)){
1239
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1245
if(not good_flags(if_entry->d_name, &ifr)){
1251
int notdotentries(const struct dirent *direntry){
1252
/* Skip "." and ".." */
1253
if(direntry->d_name[0] == '.'
1254
and (direntry->d_name[1] == '\0'
1255
or (direntry->d_name[1] == '.'
1256
and direntry->d_name[2] == '\0'))){
1262
/* Is this directory entry a runnable program? */
1263
int runnable_hook(const struct dirent *direntry){
1268
if((direntry->d_name)[0] == '\0'){
1273
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1274
"abcdefghijklmnopqrstuvwxyz"
1277
if((direntry->d_name)[sret] != '\0'){
1278
/* Contains non-allowed characters */
1280
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1286
char *fullname = NULL;
1287
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1289
perror_plus("asprintf");
1293
ret = stat(fullname, &st);
1296
perror_plus("Could not stat hook");
1300
if(not (S_ISREG(st.st_mode))){
1301
/* Not a regular file */
1303
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1308
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1309
/* Not executable */
1311
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1317
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1323
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1325
struct timespec now;
1326
struct timespec waited_time;
1327
intmax_t block_time;
1330
if(mc.current_server == NULL){
1332
fprintf_plus(stderr, "Wait until first server is found."
1335
ret = avahi_simple_poll_iterate(s, -1);
1338
fprintf_plus(stderr, "Check current_server if we should run"
1341
/* the current time */
1342
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1344
perror_plus("clock_gettime");
1347
/* Calculating in ms how long time between now and server
1348
who we visted longest time ago. Now - last seen. */
1349
waited_time.tv_sec = (now.tv_sec
1350
- mc.current_server->last_seen.tv_sec);
1351
waited_time.tv_nsec = (now.tv_nsec
1352
- mc.current_server->last_seen.tv_nsec);
1353
/* total time is 10s/10,000ms.
1354
Converting to s from ms by dividing by 1,000,
1355
and ns to ms by dividing by 1,000,000. */
1356
block_time = ((retry_interval
1357
- ((intmax_t)waited_time.tv_sec * 1000))
1358
- ((intmax_t)waited_time.tv_nsec / 1000000));
1361
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1365
if(block_time <= 0){
1366
ret = start_mandos_communication(mc.current_server->ip,
1367
mc.current_server->port,
1368
mc.current_server->if_index,
1369
mc.current_server->af);
1371
avahi_simple_poll_quit(mc.simple_poll);
1374
ret = clock_gettime(CLOCK_MONOTONIC,
1375
&mc.current_server->last_seen);
1377
perror_plus("clock_gettime");
1380
mc.current_server = mc.current_server->next;
1381
block_time = 0; /* Call avahi to find new Mandos
1382
servers, but don't block */
1385
ret = avahi_simple_poll_iterate(s, (int)block_time);
1388
if (ret > 0 or errno != EINTR){
1389
return (ret != 1) ? ret : 0;
1395
/* Set effective uid to 0, return errno */
1396
error_t raise_privileges(void){
1397
error_t old_errno = errno;
1398
error_t ret_errno = 0;
1399
if(seteuid(0) == -1){
1401
perror_plus("seteuid");
1407
/* Set effective and real user ID to 0. Return errno. */
1408
error_t raise_privileges_permanently(void){
1409
error_t old_errno = errno;
1410
error_t ret_errno = raise_privileges();
1415
if(setuid(0) == -1){
1417
perror_plus("seteuid");
1423
/* Set effective user ID to unprivileged saved user ID */
1424
error_t lower_privileges(void){
1425
error_t old_errno = errno;
1426
error_t ret_errno = 0;
1427
if(seteuid(uid) == -1){
1429
perror_plus("seteuid");
1435
bool run_network_hooks(const char *mode, const char *interface,
1437
struct dirent **direntries;
1438
struct dirent *direntry;
1440
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1443
perror_plus("scandir");
1445
int devnull = open("/dev/null", O_RDONLY);
1446
for(int i = 0; i < numhooks; i++){
1447
direntry = direntries[i];
1448
char *fullname = NULL;
1449
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1451
perror_plus("asprintf");
1455
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1458
pid_t hook_pid = fork();
1461
/* Raise privileges */
1462
raise_privileges_permanently();
1467
perror_plus("setgid");
1469
/* Reset supplementary groups */
1471
ret = setgroups(0, NULL);
1473
perror_plus("setgroups");
1475
dup2(devnull, STDIN_FILENO);
1477
dup2(STDERR_FILENO, STDOUT_FILENO);
1478
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1480
perror_plus("setenv");
1483
ret = setenv("DEVICE", interface, 1);
1485
perror_plus("setenv");
1488
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1490
perror_plus("setenv");
1493
ret = setenv("MODE", mode, 1);
1495
perror_plus("setenv");
1499
ret = asprintf(&delaystring, "%f", delay);
1501
perror_plus("asprintf");
1504
ret = setenv("DELAY", delaystring, 1);
1507
perror_plus("setenv");
1511
if(connect_to != NULL){
1512
ret = setenv("CONNECT", connect_to, 1);
1514
perror_plus("setenv");
1518
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1519
perror_plus("execl");
1520
_exit(EXIT_FAILURE);
1524
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1525
perror_plus("waitpid");
1529
if(WIFEXITED(status)){
1530
if(WEXITSTATUS(status) != 0){
1531
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1532
" with status %d\n", direntry->d_name,
1533
WEXITSTATUS(status));
1537
} else if(WIFSIGNALED(status)){
1538
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1539
" signal %d\n", direntry->d_name,
1544
fprintf_plus(stderr, "Warning: network hook \"%s\""
1545
" crashed\n", direntry->d_name);
1552
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1561
int bring_up_interface(const char *const interface,
1564
int old_errno = errno;
1567
struct ifreq network;
1568
AvahiIfIndex if_index = (AvahiIfIndex)if_nametoindex(interface);
1570
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1580
/* Re-raise priviliges */
1584
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1585
messages about the network interface to mess up the prompt */
1586
ret = klogctl(8, NULL, 5);
1587
bool restore_loglevel = true;
1589
restore_loglevel = false;
1590
perror_plus("klogctl");
1592
#endif /* __linux__ */
1594
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1597
perror_plus("socket");
1599
if(restore_loglevel){
1600
ret = klogctl(7, NULL, 0);
1602
perror_plus("klogctl");
1605
#endif /* __linux__ */
1606
/* Lower privileges */
1611
strcpy(network.ifr_name, interface);
1612
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1615
perror_plus("ioctl SIOCGIFFLAGS");
1617
if(restore_loglevel){
1618
ret = klogctl(7, NULL, 0);
1620
perror_plus("klogctl");
1623
#endif /* __linux__ */
1624
/* Lower privileges */
1629
if((network.ifr_flags & IFF_UP) == 0){
1630
network.ifr_flags |= IFF_UP;
1631
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1634
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1636
if(restore_loglevel){
1637
ret = klogctl(7, NULL, 0);
1639
perror_plus("klogctl");
1642
#endif /* __linux__ */
1643
/* Lower privileges */
1649
/* Sleep checking until interface is running.
1650
Check every 0.25s, up to total time of delay */
1651
for(int i=0; i < delay * 4; i++){
1652
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1654
perror_plus("ioctl SIOCGIFFLAGS");
1655
} else if(network.ifr_flags & IFF_RUNNING){
1658
struct timespec sleeptime = { .tv_nsec = 250000000 };
1659
ret = nanosleep(&sleeptime, NULL);
1660
if(ret == -1 and errno != EINTR){
1661
perror_plus("nanosleep");
1664
/* Close the socket */
1665
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1667
perror_plus("close");
1670
if(restore_loglevel){
1671
/* Restores kernel loglevel to default */
1672
ret = klogctl(7, NULL, 0);
1674
perror_plus("klogctl");
1677
#endif /* __linux__ */
1678
/* Lower privileges */
1684
1023
int main(int argc, char *argv[]){
1685
1024
AvahiSServiceBrowser *sb = NULL;
1876
/* Work around Debian bug #633582:
1877
<http://bugs.debian.org/633582> */
1879
/* Re-raise priviliges */
1880
if(raise_privileges() == 0){
1883
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1884
int seckey_fd = open(seckey, O_RDONLY);
1885
if(seckey_fd == -1){
1886
perror_plus("open");
1888
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1890
perror_plus("fstat");
1892
if(S_ISREG(st.st_mode)
1893
and st.st_uid == 0 and st.st_gid == 0){
1894
ret = fchown(seckey_fd, uid, gid);
1896
perror_plus("fchown");
1900
TEMP_FAILURE_RETRY(close(seckey_fd));
1904
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1905
int pubkey_fd = open(pubkey, O_RDONLY);
1906
if(pubkey_fd == -1){
1907
perror_plus("open");
1909
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1911
perror_plus("fstat");
1913
if(S_ISREG(st.st_mode)
1914
and st.st_uid == 0 and st.st_gid == 0){
1915
ret = fchown(pubkey_fd, uid, gid);
1917
perror_plus("fchown");
1921
TEMP_FAILURE_RETRY(close(pubkey_fd));
1925
/* Lower privileges */
1929
perror_plus("seteuid");
1934
/* Run network hooks */
1935
if(not run_network_hooks("start", interface, delay)){
1940
1197
avahi_set_log_function(empty_log);
1943
if(interface[0] == '\0'){
1944
struct dirent **direntries;
1945
/* First look for interfaces that are up */
1946
ret = scandir(sys_class_net, &direntries, up_interface,
1949
/* No up interfaces, look for any good interfaces */
1951
ret = scandir(sys_class_net, &direntries, good_interface,
1955
/* Pick the first interface returned */
1956
interface = strdup(direntries[0]->d_name);
1958
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1960
if(interface == NULL){
1961
perror_plus("malloc");
1963
exitcode = EXIT_FAILURE;
1969
fprintf_plus(stderr, "Could not find a network interface\n");
1970
exitcode = EXIT_FAILURE;
1975
1200
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1976
1201
from the signal handler */
1977
1202
/* Initialize the pseudo-RNG for Avahi */
1978
1203
srand((unsigned int) time(NULL));
1979
1204
mc.simple_poll = avahi_simple_poll_new();
1980
1205
if(mc.simple_poll == NULL){
1981
fprintf_plus(stderr,
1982
"Avahi: Failed to create simple poll object.\n");
1206
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1983
1207
exitcode = EX_UNAVAILABLE;
2010
1234
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
2012
perror_plus("sigaction");
1236
perror("sigaction");
2013
1237
return EX_OSERR;
2015
1239
if(old_sigterm_action.sa_handler != SIG_IGN){
2016
1240
ret = sigaction(SIGINT, &sigterm_action, NULL);
2018
perror_plus("sigaction");
1242
perror("sigaction");
2019
1243
exitcode = EX_OSERR;
2023
1247
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
2025
perror_plus("sigaction");
1249
perror("sigaction");
2026
1250
return EX_OSERR;
2028
1252
if(old_sigterm_action.sa_handler != SIG_IGN){
2029
1253
ret = sigaction(SIGHUP, &sigterm_action, NULL);
2031
perror_plus("sigaction");
1255
perror("sigaction");
2032
1256
exitcode = EX_OSERR;
2036
1260
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
2038
perror_plus("sigaction");
1262
perror("sigaction");
2039
1263
return EX_OSERR;
2041
1265
if(old_sigterm_action.sa_handler != SIG_IGN){
2042
1266
ret = sigaction(SIGTERM, &sigterm_action, NULL);
2044
perror_plus("sigaction");
1268
perror("sigaction");
2045
1269
exitcode = EX_OSERR;
2050
1274
/* If the interface is down, bring it up */
2051
if((interface[0] != '\0') and (strcmp(interface, "none") != 0)){
2052
ret = bring_up_interface(interface, delay);
2055
perror_plus("Failed to bring up interface");
1275
if(interface[0] != '\0'){
1276
if_index = (AvahiIfIndex) if_nametoindex(interface);
1278
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1279
exitcode = EX_UNAVAILABLE;
1287
/* Re-raise priviliges */
1295
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1296
messages about the network interface to mess up the prompt */
1297
ret = klogctl(8, NULL, 5);
1298
bool restore_loglevel = true;
1300
restore_loglevel = false;
1303
#endif /* __linux__ */
1305
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1308
exitcode = EX_OSERR;
1310
if(restore_loglevel){
1311
ret = klogctl(7, NULL, 0);
1316
#endif /* __linux__ */
1317
/* Lower privileges */
1325
strcpy(network.ifr_name, interface);
1326
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1328
perror("ioctl SIOCGIFFLAGS");
1330
if(restore_loglevel){
1331
ret = klogctl(7, NULL, 0);
1336
#endif /* __linux__ */
1337
exitcode = EX_OSERR;
1338
/* Lower privileges */
1346
if((network.ifr_flags & IFF_UP) == 0){
1347
network.ifr_flags |= IFF_UP;
1348
take_down_interface = true;
1349
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1351
take_down_interface = false;
1352
perror("ioctl SIOCSIFFLAGS");
1353
exitcode = EX_OSERR;
1355
if(restore_loglevel){
1356
ret = klogctl(7, NULL, 0);
1361
#endif /* __linux__ */
1362
/* Lower privileges */
1371
/* sleep checking until interface is running */
1372
for(int i=0; i < delay * 4; i++){
1373
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1375
perror("ioctl SIOCGIFFLAGS");
1376
} else if(network.ifr_flags & IFF_RUNNING){
1379
struct timespec sleeptime = { .tv_nsec = 250000000 };
1380
ret = nanosleep(&sleeptime, NULL);
1381
if(ret == -1 and errno != EINTR){
1382
perror("nanosleep");
1385
if(not take_down_interface){
1386
/* We won't need the socket anymore */
1387
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1393
if(restore_loglevel){
1394
/* Restores kernel loglevel to default */
1395
ret = klogctl(7, NULL, 0);
1400
#endif /* __linux__ */
1401
/* Lower privileges */
1403
if(take_down_interface){
1404
/* Lower privileges */
1410
/* Lower privileges permanently */
2252
1608
gpgme_release(mc.ctx);
2255
/* Cleans up the circular linked list of Mandos servers the client
2257
if(mc.current_server != NULL){
2258
mc.current_server->prev->next = NULL;
2259
while(mc.current_server != NULL){
2260
server *next = mc.current_server->next;
2261
free(mc.current_server);
2262
mc.current_server = next;
1611
/* Take down the network interface */
1612
if(take_down_interface){
1613
/* Re-raise priviliges */
2266
/* Run network hooks */
2267
run_network_hooks("stop", interface, delay);
2269
/* Re-raise priviliges */
2273
/* Take down the network interface */
2274
if(take_down_interface and geteuid() == 0){
2275
1620
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2277
perror_plus("ioctl SIOCGIFFLAGS");
2278
} else if(network.ifr_flags & IFF_UP){
1622
perror("ioctl SIOCGIFFLAGS");
1623
} else if(network.ifr_flags & IFF_UP) {
2279
1624
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2280
1625
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2282
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1627
perror("ioctl SIOCSIFFLAGS");
2285
1630
ret = (int)TEMP_FAILURE_RETRY(close(sd));
2287
perror_plus("close");
1634
/* Lower privileges permanently */
2291
/* Lower privileges permanently */
2295
perror_plus("setuid");
2298
/* Removes the GPGME temp directory and all files inside */
1643
/* Removes the temp directory used by GPGME */
2299
1644
if(tempdir_created){
2300
struct dirent **direntries = NULL;
2301
struct dirent *direntry = NULL;
2302
int numentries = scandir(tempdir, &direntries, notdotentries,
2304
if (numentries > 0){
2305
for(int i = 0; i < numentries; i++){
2306
direntry = direntries[i];
1646
struct dirent *direntry;
1647
d = opendir(tempdir);
1649
if(errno != ENOENT){
1654
direntry = readdir(d);
1655
if(direntry == NULL){
1658
/* Skip "." and ".." */
1659
if(direntry->d_name[0] == '.'
1660
and (direntry->d_name[1] == '\0'
1661
or (direntry->d_name[1] == '.'
1662
and direntry->d_name[2] == '\0'))){
2307
1665
char *fullname = NULL;
2308
1666
ret = asprintf(&fullname, "%s/%s", tempdir,
2309
1667
direntry->d_name);
2311
perror_plus("asprintf");
2314
1672
ret = remove(fullname);
2316
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
1674
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
2319
1677
free(fullname);
2323
/* need to clean even if 0 because man page doesn't specify */
2325
if (numentries == -1){
2326
perror_plus("scandir");
2328
1681
ret = rmdir(tempdir);
2329
1682
if(ret == -1 and errno != ENOENT){
2330
perror_plus("rmdir");