1072
/* Signal handler that stops main loop after sigterm has been called */
1073
static void handle_sigterm(int sig){
1078
signal_received = sig;
1079
int old_errno = errno;
1080
/* set main loop to exit */
1081
if(mc.simple_poll != NULL){
1082
avahi_simple_poll_quit(mc.simple_poll);
1088
* This function determines if a directory entry in /sys/class/net
1089
* corresponds to an acceptable network device.
1090
* (This function is passed to scandir(3) as a filter function.)
1092
int good_interface(const struct dirent *if_entry){
1094
char *flagname = NULL;
1095
if(if_entry->d_name[0] == '.'){
1098
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1101
perror_plus("asprintf");
1104
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1106
perror_plus("open");
1111
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1112
/* read line from flags_fd */
1113
ssize_t to_read = (sizeof(ifreq_flags)*2)+3; /* "0x1003\n" */
1114
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1115
flagstring[(size_t)to_read] = '\0';
1116
if(flagstring == NULL){
1117
perror_plus("malloc");
1122
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1125
perror_plus("read");
1139
tmpmax = strtoimax(flagstring, &tmp, 0);
1140
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1141
and not (isspace(*tmp)))
1142
or tmpmax != (ifreq_flags)tmpmax){
1144
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1145
flagstring, if_entry->d_name);
1151
ifreq_flags flags = (ifreq_flags)tmpmax;
1152
/* Reject the loopback device */
1153
if(flags & IFF_LOOPBACK){
1155
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1160
/* Accept point-to-point devices only if connect_to is specified */
1161
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1163
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1168
/* Otherwise, reject non-broadcast-capable devices */
1169
if(not (flags & IFF_BROADCAST)){
1171
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1176
/* Reject non-ARP interfaces (including dummy interfaces) */
1177
if(flags & IFF_NOARP){
1179
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n",
1184
/* Accept this device */
1186
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1192
int notdotentries(const struct dirent *direntry){
1193
/* Skip "." and ".." */
1194
if(direntry->d_name[0] == '.'
1195
and (direntry->d_name[1] == '\0'
1196
or (direntry->d_name[1] == '.'
1197
and direntry->d_name[2] == '\0'))){
1203
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1205
struct timespec now;
1206
struct timespec waited_time;
1207
intmax_t block_time;
1210
if(mc.current_server == NULL){
1212
fprintf(stderr, "Wait until first server is found. No timeout!\n");
1214
ret = avahi_simple_poll_iterate(s, -1);
1217
fprintf(stderr, "Check current_server if we should run it, or wait\n");
1219
/* the current time */
1220
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1222
perror_plus("clock_gettime");
1225
/* Calculating in ms how long time between now and server
1226
who we visted longest time ago. Now - last seen. */
1227
waited_time.tv_sec = now.tv_sec - mc.current_server->last_seen.tv_sec;
1228
waited_time.tv_nsec = now.tv_nsec - mc.current_server->last_seen.tv_nsec;
1229
/* total time is 10s/10000ms. Converting to s to ms by 1000/s, and ns to ms by divind by 1000000. */
1230
block_time = (retry_interval - ((intmax_t)waited_time.tv_sec * 1000)) - ((intmax_t)waited_time.tv_nsec / 1000000);
1233
fprintf(stderr, "Blocking for %ld ms\n", block_time);
1236
if(block_time <= 0){
1237
ret = start_mandos_communication(mc.current_server->ip,
1238
mc.current_server->port,
1239
mc.current_server->if_index,
1240
mc.current_server->af);
1242
avahi_simple_poll_quit(mc.simple_poll);
1245
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
1247
perror_plus("clock_gettime");
1250
mc.current_server = mc.current_server->next;
1251
block_time = 0; /* call avahi to find new mandos servers, but dont block */
1254
ret = avahi_simple_poll_iterate(s, (int)block_time);
1257
if (ret > 0 or errno != EINTR) {
1258
return (ret != 1) ? ret : 0;
810
1264
int main(int argc, char *argv[]){
811
AvahiSServiceBrowser *sb = NULL;
814
int exitcode = EXIT_SUCCESS;
815
const char *interface = "eth0";
816
struct ifreq network;
820
char *connect_to = NULL;
821
char tempdir[] = "/tmp/mandosXXXXXX";
822
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
823
const char *seckey = PATHDIR "/" SECKEY;
824
const char *pubkey = PATHDIR "/" PUBKEY;
826
mandos_context mc = { .simple_poll = NULL, .server = NULL,
827
.dh_bits = 1024, .priority = "SECURE256"
828
":!CTYPE-X.509:+CTYPE-OPENPGP" };
829
bool gnutls_initalized = false;
830
bool gpgme_initalized = false;
833
struct argp_option options[] = {
834
{ .name = "debug", .key = 128,
835
.doc = "Debug mode", .group = 3 },
836
{ .name = "connect", .key = 'c',
837
.arg = "ADDRESS:PORT",
838
.doc = "Connect directly to a specific Mandos server",
840
{ .name = "interface", .key = 'i',
842
.doc = "Interface that will be used to search for Mandos"
845
{ .name = "seckey", .key = 's',
847
.doc = "OpenPGP secret key file base name",
849
{ .name = "pubkey", .key = 'p',
851
.doc = "OpenPGP public key file base name",
853
{ .name = "dh-bits", .key = 129,
855
.doc = "Bit length of the prime number used in the"
856
" Diffie-Hellman key exchange",
858
{ .name = "priority", .key = 130,
860
.doc = "GnuTLS priority string for the TLS handshake",
865
error_t parse_opt (int key, char *arg,
866
struct argp_state *state) {
867
/* Get the INPUT argument from `argp_parse', which we know is
868
a pointer to our plugin list pointer. */
870
case 128: /* --debug */
873
case 'c': /* --connect */
876
case 'i': /* --interface */
879
case 's': /* --seckey */
882
case 'p': /* --pubkey */
885
case 129: /* --dh-bits */
887
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
893
case 130: /* --priority */
901
return ARGP_ERR_UNKNOWN;
906
struct argp argp = { .options = options, .parser = parse_opt,
908
.doc = "Mandos client -- Get and decrypt"
909
" passwords from a Mandos server" };
910
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
911
if (ret == ARGP_ERR_UNKNOWN){
912
fprintf(stderr, "Unknown error while parsing arguments\n");
913
exitcode = EXIT_FAILURE;
918
/* If the interface is down, bring it up */
920
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
923
exitcode = EXIT_FAILURE;
926
strcpy(network.ifr_name, interface);
927
ret = ioctl(sd, SIOCGIFFLAGS, &network);
929
perror("ioctl SIOCGIFFLAGS");
930
exitcode = EXIT_FAILURE;
933
if((network.ifr_flags & IFF_UP) == 0){
934
network.ifr_flags |= IFF_UP;
935
ret = ioctl(sd, SIOCSIFFLAGS, &network);
937
perror("ioctl SIOCSIFFLAGS");
938
exitcode = EXIT_FAILURE;
942
ret = TEMP_FAILURE_RETRY(close(sd));
961
ret = init_gnutls_global(&mc, pubkey, seckey);
963
fprintf(stderr, "init_gnutls_global failed\n");
964
exitcode = EXIT_FAILURE;
967
gnutls_initalized = true;
970
if(mkdtemp(tempdir) == NULL){
976
if(not init_gpgme(&mc, pubkey, seckey, tempdir)){
977
fprintf(stderr, "gpgme_initalized failed\n");
978
exitcode = EXIT_FAILURE;
981
gpgme_initalized = true;
1265
AvahiSServiceBrowser *sb = NULL;
1270
int exitcode = EXIT_SUCCESS;
1271
const char *interface = "";
1272
struct ifreq network;
1274
bool take_down_interface = false;
1277
char tempdir[] = "/tmp/mandosXXXXXX";
1278
bool tempdir_created = false;
1279
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1280
const char *seckey = PATHDIR "/" SECKEY;
1281
const char *pubkey = PATHDIR "/" PUBKEY;
1283
bool gnutls_initialized = false;
1284
bool gpgme_initialized = false;
1286
double retry_interval = 10; /* 10s between retrying a server and checking again*/
1288
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1289
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1294
/* Lower any group privileges we might have, just to be safe */
1298
perror_plus("setgid");
1301
/* Lower user privileges (temporarily) */
1305
perror_plus("seteuid");
1313
struct argp_option options[] = {
1314
{ .name = "debug", .key = 128,
1315
.doc = "Debug mode", .group = 3 },
1316
{ .name = "connect", .key = 'c',
1317
.arg = "ADDRESS:PORT",
1318
.doc = "Connect directly to a specific Mandos server",
1320
{ .name = "interface", .key = 'i',
1322
.doc = "Network interface that will be used to search for"
1325
{ .name = "seckey", .key = 's',
1327
.doc = "OpenPGP secret key file base name",
1329
{ .name = "pubkey", .key = 'p',
1331
.doc = "OpenPGP public key file base name",
1333
{ .name = "dh-bits", .key = 129,
1335
.doc = "Bit length of the prime number used in the"
1336
" Diffie-Hellman key exchange",
1338
{ .name = "priority", .key = 130,
1340
.doc = "GnuTLS priority string for the TLS handshake",
1342
{ .name = "delay", .key = 131,
1344
.doc = "Maximum delay to wait for interface startup",
1346
{ .name = "retry", .key = 132,
1348
.doc = "Retry interval used when denied by the mandos server",
1351
* These reproduce what we would get without ARGP_NO_HELP
1353
{ .name = "help", .key = '?',
1354
.doc = "Give this help list", .group = -1 },
1355
{ .name = "usage", .key = -3,
1356
.doc = "Give a short usage message", .group = -1 },
1357
{ .name = "version", .key = 'V',
1358
.doc = "Print program version", .group = -1 },
1362
error_t parse_opt(int key, char *arg,
1363
struct argp_state *state){
1366
case 128: /* --debug */
1369
case 'c': /* --connect */
1372
case 'i': /* --interface */
1375
case 's': /* --seckey */
1378
case 'p': /* --pubkey */
1381
case 129: /* --dh-bits */
1383
tmpmax = strtoimax(arg, &tmp, 10);
1384
if(errno != 0 or tmp == arg or *tmp != '\0'
1385
or tmpmax != (typeof(mc.dh_bits))tmpmax){
1386
argp_error(state, "Bad number of DH bits");
1388
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
1390
case 130: /* --priority */
1393
case 131: /* --delay */
1395
delay = strtof(arg, &tmp);
1396
if(errno != 0 or tmp == arg or *tmp != '\0'){
1397
argp_error(state, "Bad delay");
1399
case 132: /* --retry */
1401
retry_interval = strtod(arg, &tmp);
1402
if(errno != 0 or tmp == arg or *tmp != '\0'
1403
or (retry_interval * 1000) > INT_MAX){
1404
argp_error(state, "Bad retry interval");
1408
* These reproduce what we would get without ARGP_NO_HELP
1410
case '?': /* --help */
1411
argp_state_help(state, state->out_stream,
1412
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
1413
& ~(unsigned int)ARGP_HELP_EXIT_OK);
1414
case -3: /* --usage */
1415
argp_state_help(state, state->out_stream,
1416
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1417
case 'V': /* --version */
1418
fprintf(state->out_stream, "%s\n", argp_program_version);
1419
exit(argp_err_exit_status);
1422
return ARGP_ERR_UNKNOWN;
1427
struct argp argp = { .options = options, .parser = parse_opt,
1429
.doc = "Mandos client -- Get and decrypt"
1430
" passwords from a Mandos server" };
1431
ret = argp_parse(&argp, argc, argv,
1432
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
1439
perror_plus("argp_parse");
1440
exitcode = EX_OSERR;
1443
exitcode = EX_USAGE;
1449
avahi_set_log_function(empty_log);
1452
if(interface[0] == '\0'){
1453
struct dirent **direntries;
1454
ret = scandir(sys_class_net, &direntries, good_interface,
1457
/* Pick the first good interface */
1458
interface = strdup(direntries[0]->d_name);
1460
fprintf(stderr, "Using interface \"%s\"\n", interface);
1462
if(interface == NULL){
1463
perror_plus("malloc");
1465
exitcode = EXIT_FAILURE;
1471
fprintf(stderr, "Could not find a network interface\n");
1472
exitcode = EXIT_FAILURE;
1477
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1478
from the signal handler */
1479
/* Initialize the pseudo-RNG for Avahi */
1480
srand((unsigned int) time(NULL));
1481
mc.simple_poll = avahi_simple_poll_new();
1482
if(mc.simple_poll == NULL){
1483
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1484
exitcode = EX_UNAVAILABLE;
1488
sigemptyset(&sigterm_action.sa_mask);
1489
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1491
perror_plus("sigaddset");
1492
exitcode = EX_OSERR;
1495
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1497
perror_plus("sigaddset");
1498
exitcode = EX_OSERR;
1501
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1503
perror_plus("sigaddset");
1504
exitcode = EX_OSERR;
1507
/* Need to check if the handler is SIG_IGN before handling:
1508
| [[info:libc:Initial Signal Actions]] |
1509
| [[info:libc:Basic Signal Handling]] |
1511
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1513
perror_plus("sigaction");
1516
if(old_sigterm_action.sa_handler != SIG_IGN){
1517
ret = sigaction(SIGINT, &sigterm_action, NULL);
1519
perror_plus("sigaction");
1520
exitcode = EX_OSERR;
1524
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1526
perror_plus("sigaction");
1529
if(old_sigterm_action.sa_handler != SIG_IGN){
1530
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1532
perror_plus("sigaction");
1533
exitcode = EX_OSERR;
1537
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1539
perror_plus("sigaction");
1542
if(old_sigterm_action.sa_handler != SIG_IGN){
1543
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1545
perror_plus("sigaction");
1546
exitcode = EX_OSERR;
1551
/* If the interface is down, bring it up */
1552
if(strcmp(interface, "none") != 0){
984
1553
if_index = (AvahiIfIndex) if_nametoindex(interface);
985
1554
if(if_index == 0){
986
1555
fprintf(stderr, "No such interface: \"%s\"\n", interface);
990
if(connect_to != NULL){
991
/* Connect directly, do not use Zeroconf */
992
/* (Mainly meant for debugging) */
993
char *address = strrchr(connect_to, ':');
995
fprintf(stderr, "No colon in address\n");
996
exitcode = EXIT_FAILURE;
1000
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
1002
perror("Bad port number");
1003
exitcode = EXIT_FAILURE;
1007
address = connect_to;
1008
ret = start_mandos_communication(address, port, if_index, &mc);
1010
exitcode = EXIT_FAILURE;
1012
exitcode = EXIT_SUCCESS;
1018
avahi_set_log_function(empty_log);
1021
/* Initialize the pseudo-RNG for Avahi */
1022
srand((unsigned int) time(NULL));
1024
/* Allocate main Avahi loop object */
1025
mc.simple_poll = avahi_simple_poll_new();
1026
if (mc.simple_poll == NULL) {
1027
fprintf(stderr, "Avahi: Failed to create simple poll"
1029
exitcode = EXIT_FAILURE;
1034
AvahiServerConfig config;
1035
/* Do not publish any local Zeroconf records */
1036
avahi_server_config_init(&config);
1037
config.publish_hinfo = 0;
1038
config.publish_addresses = 0;
1039
config.publish_workstation = 0;
1040
config.publish_domain = 0;
1042
/* Allocate a new server */
1043
mc.server = avahi_server_new(avahi_simple_poll_get
1044
(mc.simple_poll), &config, NULL,
1047
/* Free the Avahi configuration data */
1048
avahi_server_config_free(&config);
1051
/* Check if creating the Avahi server object succeeded */
1052
if (mc.server == NULL) {
1053
fprintf(stderr, "Failed to create Avahi server: %s\n",
1054
avahi_strerror(error));
1055
exitcode = EXIT_FAILURE;
1059
/* Create the Avahi service browser */
1060
sb = avahi_s_service_browser_new(mc.server, if_index,
1062
"_mandos._tcp", NULL, 0,
1063
browse_callback, &mc);
1065
fprintf(stderr, "Failed to create service browser: %s\n",
1066
avahi_strerror(avahi_server_errno(mc.server)));
1067
exitcode = EXIT_FAILURE;
1071
/* Run the main loop */
1074
fprintf(stderr, "Starting Avahi loop search\n");
1077
avahi_simple_poll_loop(mc.simple_poll);
1556
exitcode = EX_UNAVAILABLE;
1564
/* Re-raise priviliges */
1568
perror_plus("seteuid");
1572
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1573
messages about the network interface to mess up the prompt */
1574
ret = klogctl(8, NULL, 5);
1575
bool restore_loglevel = true;
1577
restore_loglevel = false;
1578
perror_plus("klogctl");
1580
#endif /* __linux__ */
1582
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1584
perror_plus("socket");
1585
exitcode = EX_OSERR;
1587
if(restore_loglevel){
1588
ret = klogctl(7, NULL, 0);
1590
perror_plus("klogctl");
1593
#endif /* __linux__ */
1594
/* Lower privileges */
1598
perror_plus("seteuid");
1602
strcpy(network.ifr_name, interface);
1603
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1605
perror_plus("ioctl SIOCGIFFLAGS");
1607
if(restore_loglevel){
1608
ret = klogctl(7, NULL, 0);
1610
perror_plus("klogctl");
1613
#endif /* __linux__ */
1614
exitcode = EX_OSERR;
1615
/* Lower privileges */
1619
perror_plus("seteuid");
1623
if((network.ifr_flags & IFF_UP) == 0){
1624
network.ifr_flags |= IFF_UP;
1625
take_down_interface = true;
1626
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1628
take_down_interface = false;
1629
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1630
exitcode = EX_OSERR;
1632
if(restore_loglevel){
1633
ret = klogctl(7, NULL, 0);
1635
perror_plus("klogctl");
1638
#endif /* __linux__ */
1639
/* Lower privileges */
1643
perror_plus("seteuid");
1648
/* sleep checking until interface is running. Check every 0.25s, up to total time of delay */
1649
for(int i=0; i < delay * 4; i++){
1650
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1652
perror_plus("ioctl SIOCGIFFLAGS");
1653
} else if(network.ifr_flags & IFF_RUNNING){
1656
struct timespec sleeptime = { .tv_nsec = 250000000 };
1657
ret = nanosleep(&sleeptime, NULL);
1658
if(ret == -1 and errno != EINTR){
1659
perror_plus("nanosleep");
1662
if(not take_down_interface){
1663
/* We won't need the socket anymore */
1664
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1666
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 */
1680
if(take_down_interface){
1681
/* Lower privileges */
1684
perror_plus("seteuid");
1687
/* Lower privileges permanently */
1690
perror_plus("setuid");
1699
ret = init_gnutls_global(pubkey, seckey);
1701
fprintf(stderr, "init_gnutls_global failed\n");
1702
exitcode = EX_UNAVAILABLE;
1705
gnutls_initialized = true;
1712
if(mkdtemp(tempdir) == NULL){
1713
perror_plus("mkdtemp");
1716
tempdir_created = true;
1722
if(not init_gpgme(pubkey, seckey, tempdir)){
1723
fprintf(stderr, "init_gpgme failed\n");
1724
exitcode = EX_UNAVAILABLE;
1727
gpgme_initialized = true;
1734
if(connect_to != NULL){
1735
/* Connect directly, do not use Zeroconf */
1736
/* (Mainly meant for debugging) */
1737
char *address = strrchr(connect_to, ':');
1738
if(address == NULL){
1739
fprintf(stderr, "No colon in address\n");
1740
exitcode = EX_USAGE;
1750
tmpmax = strtoimax(address+1, &tmp, 10);
1751
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1752
or tmpmax != (uint16_t)tmpmax){
1753
fprintf(stderr, "Bad port number\n");
1754
exitcode = EX_USAGE;
1762
port = (uint16_t)tmpmax;
1764
address = connect_to;
1765
/* Colon in address indicates IPv6 */
1767
if(strchr(address, ':') != NULL){
1777
while(not quit_now){
1778
ret = start_mandos_communication(address, port, if_index, af);
1779
if(quit_now or ret == 0){
1782
sleep((int)retry_interval or 1);
1786
exitcode = EXIT_SUCCESS;
1797
AvahiServerConfig config;
1798
/* Do not publish any local Zeroconf records */
1799
avahi_server_config_init(&config);
1800
config.publish_hinfo = 0;
1801
config.publish_addresses = 0;
1802
config.publish_workstation = 0;
1803
config.publish_domain = 0;
1805
/* Allocate a new server */
1806
mc.server = avahi_server_new(avahi_simple_poll_get
1807
(mc.simple_poll), &config, NULL,
1810
/* Free the Avahi configuration data */
1811
avahi_server_config_free(&config);
1814
/* Check if creating the Avahi server object succeeded */
1815
if(mc.server == NULL){
1816
fprintf(stderr, "Failed to create Avahi server: %s\n",
1817
avahi_strerror(error));
1818
exitcode = EX_UNAVAILABLE;
1826
/* Create the Avahi service browser */
1827
sb = avahi_s_service_browser_new(mc.server, if_index,
1828
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
1829
NULL, 0, browse_callback, NULL);
1831
fprintf(stderr, "Failed to create service browser: %s\n",
1832
avahi_strerror(avahi_server_errno(mc.server)));
1833
exitcode = EX_UNAVAILABLE;
1841
/* Run the main loop */
1844
fprintf(stderr, "Starting Avahi loop search\n");
1847
ret = avahi_loop_with_timeout(mc.simple_poll, (int)(retry_interval * 1000));
1849
fprintf(stderr, "avahi_loop_with_timeout exited %s\n",
1850
(ret == 0) ? "successfully" : "with error");
1082
fprintf(stderr, "%s exiting\n", argv[0]);
1085
/* Cleanup things */
1087
avahi_s_service_browser_free(sb);
1089
if (mc.server != NULL)
1090
avahi_server_free(mc.server);
1092
if (mc.simple_poll != NULL)
1093
avahi_simple_poll_free(mc.simple_poll);
1095
if (gnutls_initalized){
1096
gnutls_certificate_free_credentials(mc.cred);
1097
gnutls_global_deinit ();
1098
gnutls_dh_params_deinit(mc.dh_params);
1101
if(gpgme_initalized){
1102
gpgme_release(mc.ctx);
1105
/* Removes the temp directory used by GPGME */
1106
if(tempdir[0] != '\0'){
1108
struct dirent *direntry;
1109
d = opendir(tempdir);
1114
direntry = readdir(d);
1115
if(direntry == NULL){
1118
if (direntry->d_type == DT_REG){
1119
char *fullname = NULL;
1120
ret = asprintf(&fullname, "%s/%s", tempdir,
1126
ret = unlink(fullname);
1128
fprintf(stderr, "unlink(\"%s\"): %s",
1129
fullname, strerror(errno));
1136
ret = rmdir(tempdir);
1856
fprintf(stderr, "%s exiting\n", argv[0]);
1859
/* Cleanup things */
1861
avahi_s_service_browser_free(sb);
1863
if(mc.server != NULL)
1864
avahi_server_free(mc.server);
1866
if(mc.simple_poll != NULL)
1867
avahi_simple_poll_free(mc.simple_poll);
1869
if(gnutls_initialized){
1870
gnutls_certificate_free_credentials(mc.cred);
1871
gnutls_global_deinit();
1872
gnutls_dh_params_deinit(mc.dh_params);
1875
if(gpgme_initialized){
1876
gpgme_release(mc.ctx);
1879
/* cleans up the circular linked list of mandos servers the client has seen */
1880
if(mc.current_server != NULL){
1881
mc.current_server->prev->next = NULL;
1882
while(mc.current_server != NULL){
1883
server *next = mc.current_server->next;
1884
free(mc.current_server);
1885
mc.current_server = next;
1889
/* Take down the network interface */
1890
if(take_down_interface){
1891
/* Re-raise priviliges */
1895
perror_plus("seteuid");
1898
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1900
perror_plus("ioctl SIOCGIFFLAGS");
1901
} else if(network.ifr_flags & IFF_UP) {
1902
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1903
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1905
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1908
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1910
perror_plus("close");
1912
/* Lower privileges permanently */
1916
perror_plus("setuid");
1921
/* Removes the GPGME temp directory and all files inside */
1922
if(tempdir_created){
1923
struct dirent **direntries = NULL;
1924
struct dirent *direntry = NULL;
1925
ret = scandir(tempdir, &direntries, notdotentries, alphasort);
1927
for(int i = 0; i < ret; i++){
1928
direntry = direntries[i];
1929
char *fullname = NULL;
1930
ret = asprintf(&fullname, "%s/%s", tempdir,
1933
perror_plus("asprintf");
1936
ret = remove(fullname);
1938
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
1945
/* need to be cleaned even if ret == 0 because man page dont specify */
1948
perror_plus("scandir");
1950
ret = rmdir(tempdir);
1951
if(ret == -1 and errno != ENOENT){
1952
perror_plus("rmdir");
1957
sigemptyset(&old_sigterm_action.sa_mask);
1958
old_sigterm_action.sa_handler = SIG_DFL;
1959
ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
1960
&old_sigterm_action,
1963
perror_plus("sigaction");
1966
ret = raise(signal_received);
1967
} while(ret != 0 and errno == EINTR);
1969
perror_plus("raise");
1972
TEMP_FAILURE_RETRY(pause());