748
/* Combines file name and path and returns the malloced new
749
string. some sane checks could/should be added */
750
static char *combinepath(const char *first, const char *second){
1073
/* Signal handler that stops main loop after SIGTERM */
1074
static void handle_sigterm(int sig){
1079
signal_received = sig;
1080
int old_errno = errno;
1081
/* set main loop to exit */
1082
if(mc.simple_poll != NULL){
1083
avahi_simple_poll_quit(mc.simple_poll);
1089
* This function determines if a directory entry in /sys/class/net
1090
* corresponds to an acceptable network device.
1091
* (This function is passed to scandir(3) as a filter function.)
1093
int good_interface(const struct dirent *if_entry){
1095
char *flagname = NULL;
1096
if(if_entry->d_name[0] == '.'){
1099
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1102
perror_plus("asprintf");
1105
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1107
perror_plus("open");
1112
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1113
/* read line from flags_fd */
1114
ssize_t to_read = 2+(sizeof(ifreq_flags)*2)+1; /* "0x1003\n" */
1115
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1116
flagstring[(size_t)to_read] = '\0';
1117
if(flagstring == NULL){
1118
perror_plus("malloc");
1123
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1126
perror_plus("read");
752
int ret = asprintf(&tmp, "%s/%s", first, second);
1140
tmpmax = strtoimax(flagstring, &tmp, 0);
1141
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1142
and not (isspace(*tmp)))
1143
or tmpmax != (ifreq_flags)tmpmax){
1145
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1146
flagstring, if_entry->d_name);
1152
ifreq_flags flags = (ifreq_flags)tmpmax;
1153
/* Reject the loopback device */
1154
if(flags & IFF_LOOPBACK){
1156
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1161
/* Accept point-to-point devices only if connect_to is specified */
1162
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1164
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1169
/* Otherwise, reject non-broadcast-capable devices */
1170
if(not (flags & IFF_BROADCAST)){
1172
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1177
/* Reject non-ARP interfaces (including dummy interfaces) */
1178
if(flags & IFF_NOARP){
1180
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n",
1185
/* Accept this device */
1187
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1193
int notdotentries(const struct dirent *direntry){
1194
/* Skip "." and ".." */
1195
if(direntry->d_name[0] == '.'
1196
and (direntry->d_name[1] == '\0'
1197
or (direntry->d_name[1] == '.'
1198
and direntry->d_name[2] == '\0'))){
1204
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1206
struct timespec now;
1207
struct timespec waited_time;
1208
intmax_t block_time;
1211
if(mc.current_server == NULL){
1214
"Wait until first server is found. No timeout!\n");
1216
ret = avahi_simple_poll_iterate(s, -1);
1219
fprintf(stderr, "Check current_server if we should run it,"
1222
/* the current time */
1223
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1225
perror_plus("clock_gettime");
1228
/* Calculating in ms how long time between now and server
1229
who we visted longest time ago. Now - last seen. */
1230
waited_time.tv_sec = (now.tv_sec
1231
- mc.current_server->last_seen.tv_sec);
1232
waited_time.tv_nsec = (now.tv_nsec
1233
- mc.current_server->last_seen.tv_nsec);
1234
/* total time is 10s/10,000ms.
1235
Converting to s from ms by dividing by 1,000,
1236
and ns to ms by dividing by 1,000,000. */
1237
block_time = ((retry_interval
1238
- ((intmax_t)waited_time.tv_sec * 1000))
1239
- ((intmax_t)waited_time.tv_nsec / 1000000));
1242
fprintf(stderr, "Blocking for %" PRIdMAX " ms\n", block_time);
1245
if(block_time <= 0){
1246
ret = start_mandos_communication(mc.current_server->ip,
1247
mc.current_server->port,
1248
mc.current_server->if_index,
1249
mc.current_server->af);
1251
avahi_simple_poll_quit(mc.simple_poll);
1254
ret = clock_gettime(CLOCK_MONOTONIC,
1255
&mc.current_server->last_seen);
1257
perror_plus("clock_gettime");
1260
mc.current_server = mc.current_server->next;
1261
block_time = 0; /* Call avahi to find new Mandos
1262
servers, but don't block */
1265
ret = avahi_simple_poll_iterate(s, (int)block_time);
1268
if (ret > 0 or errno != EINTR) {
1269
return (ret != 1) ? ret : 0;
760
1275
int main(int argc, char *argv[]){
761
AvahiSServiceBrowser *sb = NULL;
764
int exitcode = EXIT_SUCCESS;
765
const char *interface = "eth0";
766
struct ifreq network;
770
char *connect_to = NULL;
771
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
772
char *pubkeyfilename = NULL;
773
char *seckeyfilename = NULL;
774
const char *pubkeyname = "pubkey.txt";
775
const char *seckeyname = "seckey.txt";
776
mandos_context mc = { .simple_poll = NULL, .server = NULL,
777
.dh_bits = 1024, .priority = "SECURE256"};
778
bool gnutls_initalized = false;
781
struct argp_option options[] = {
782
{ .name = "debug", .key = 128,
783
.doc = "Debug mode", .group = 3 },
784
{ .name = "connect", .key = 'c',
786
.doc = "Connect directly to a sepcified mandos server",
788
{ .name = "interface", .key = 'i',
790
.doc = "Interface that Avahi will conntect through",
792
{ .name = "keydir", .key = 'd',
794
.doc = "Directory where the openpgp keyring is",
796
{ .name = "seckey", .key = 's',
798
.doc = "Secret openpgp key for gnutls authentication",
800
{ .name = "pubkey", .key = 'p',
802
.doc = "Public openpgp key for gnutls authentication",
804
{ .name = "dh-bits", .key = 129,
806
.doc = "dh-bits to use in gnutls communication",
808
{ .name = "priority", .key = 130,
810
.doc = "GNUTLS priority", .group = 1 },
815
error_t parse_opt (int key, char *arg,
816
struct argp_state *state) {
817
/* Get the INPUT argument from `argp_parse', which we know is
818
a pointer to our plugin list pointer. */
840
mc.dh_bits = (unsigned int) strtol(arg, NULL, 10);
854
return ARGP_ERR_UNKNOWN;
859
struct argp argp = { .options = options, .parser = parse_opt,
861
.doc = "Mandos client -- Get and decrypt"
862
" passwords from mandos server" };
863
ret = argp_parse (&argp, argc, argv, 0, 0, NULL);
864
if (ret == ARGP_ERR_UNKNOWN){
865
fprintf(stderr, "Unknown error while parsing arguments\n");
866
exitcode = EXIT_FAILURE;
871
pubkeyfilename = combinepath(keydir, pubkeyname);
872
if (pubkeyfilename == NULL){
873
perror("combinepath");
874
exitcode = EXIT_FAILURE;
878
seckeyfilename = combinepath(keydir, seckeyname);
879
if (seckeyfilename == NULL){
880
perror("combinepath");
881
exitcode = EXIT_FAILURE;
885
ret = init_gnutls_global(&mc, pubkeyfilename, seckeyfilename);
887
fprintf(stderr, "init_gnutls_global failed\n");
888
exitcode = EXIT_FAILURE;
891
gnutls_initalized = true;
894
/* If the interface is down, bring it up */
896
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
899
exitcode = EXIT_FAILURE;
902
strcpy(network.ifr_name, interface);
903
ret = ioctl(sd, SIOCGIFFLAGS, &network);
905
perror("ioctl SIOCGIFFLAGS");
906
exitcode = EXIT_FAILURE;
909
if((network.ifr_flags & IFF_UP) == 0){
910
network.ifr_flags |= IFF_UP;
911
ret = ioctl(sd, SIOCSIFFLAGS, &network);
913
perror("ioctl SIOCSIFFLAGS");
914
exitcode = EXIT_FAILURE;
1276
AvahiSServiceBrowser *sb = NULL;
1281
int exitcode = EXIT_SUCCESS;
1282
const char *interface = "";
1283
struct ifreq network;
1285
bool take_down_interface = false;
1288
char tempdir[] = "/tmp/mandosXXXXXX";
1289
bool tempdir_created = false;
1290
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1291
const char *seckey = PATHDIR "/" SECKEY;
1292
const char *pubkey = PATHDIR "/" PUBKEY;
1294
bool gnutls_initialized = false;
1295
bool gpgme_initialized = false;
1297
double retry_interval = 10; /* 10s between trying a server and
1298
retrying the same server again */
1300
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1301
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1306
/* Lower any group privileges we might have, just to be safe */
1310
perror_plus("setgid");
1313
/* Lower user privileges (temporarily) */
1317
perror_plus("seteuid");
1325
struct argp_option options[] = {
1326
{ .name = "debug", .key = 128,
1327
.doc = "Debug mode", .group = 3 },
1328
{ .name = "connect", .key = 'c',
1329
.arg = "ADDRESS:PORT",
1330
.doc = "Connect directly to a specific Mandos server",
1332
{ .name = "interface", .key = 'i',
1334
.doc = "Network interface that will be used to search for"
1337
{ .name = "seckey", .key = 's',
1339
.doc = "OpenPGP secret key file base name",
1341
{ .name = "pubkey", .key = 'p',
1343
.doc = "OpenPGP public key file base name",
1345
{ .name = "dh-bits", .key = 129,
1347
.doc = "Bit length of the prime number used in the"
1348
" Diffie-Hellman key exchange",
1350
{ .name = "priority", .key = 130,
1352
.doc = "GnuTLS priority string for the TLS handshake",
1354
{ .name = "delay", .key = 131,
1356
.doc = "Maximum delay to wait for interface startup",
1358
{ .name = "retry", .key = 132,
1360
.doc = "Retry interval used when denied by the mandos server",
1363
* These reproduce what we would get without ARGP_NO_HELP
1365
{ .name = "help", .key = '?',
1366
.doc = "Give this help list", .group = -1 },
1367
{ .name = "usage", .key = -3,
1368
.doc = "Give a short usage message", .group = -1 },
1369
{ .name = "version", .key = 'V',
1370
.doc = "Print program version", .group = -1 },
1374
error_t parse_opt(int key, char *arg,
1375
struct argp_state *state){
1378
case 128: /* --debug */
1381
case 'c': /* --connect */
1384
case 'i': /* --interface */
1387
case 's': /* --seckey */
1390
case 'p': /* --pubkey */
1393
case 129: /* --dh-bits */
1395
tmpmax = strtoimax(arg, &tmp, 10);
1396
if(errno != 0 or tmp == arg or *tmp != '\0'
1397
or tmpmax != (typeof(mc.dh_bits))tmpmax){
1398
argp_error(state, "Bad number of DH bits");
1400
mc.dh_bits = (typeof(mc.dh_bits))tmpmax;
1402
case 130: /* --priority */
1405
case 131: /* --delay */
1407
delay = strtof(arg, &tmp);
1408
if(errno != 0 or tmp == arg or *tmp != '\0'){
1409
argp_error(state, "Bad delay");
1411
case 132: /* --retry */
1413
retry_interval = strtod(arg, &tmp);
1414
if(errno != 0 or tmp == arg or *tmp != '\0'
1415
or (retry_interval * 1000) > INT_MAX
1416
or retry_interval < 0){
1417
argp_error(state, "Bad retry interval");
1421
* These reproduce what we would get without ARGP_NO_HELP
1423
case '?': /* --help */
1424
argp_state_help(state, state->out_stream,
1425
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
1426
& ~(unsigned int)ARGP_HELP_EXIT_OK);
1427
case -3: /* --usage */
1428
argp_state_help(state, state->out_stream,
1429
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1430
case 'V': /* --version */
1431
fprintf(state->out_stream, "%s\n", argp_program_version);
1432
exit(argp_err_exit_status);
1435
return ARGP_ERR_UNKNOWN;
1440
struct argp argp = { .options = options, .parser = parse_opt,
1442
.doc = "Mandos client -- Get and decrypt"
1443
" passwords from a Mandos server" };
1444
ret = argp_parse(&argp, argc, argv,
1445
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
1452
perror_plus("argp_parse");
1453
exitcode = EX_OSERR;
1456
exitcode = EX_USAGE;
1462
/* Work around Debian bug #633582:
1463
<http://bugs.debian.org/633582> */
1466
/* Re-raise priviliges */
1470
perror_plus("seteuid");
1473
int seckey_fd = open(PATHDIR "/" SECKEY, O_RDONLY);
1474
if(seckey_fd == -1){
1475
perror_plus("open");
1477
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1479
perror_plus("fstat");
1481
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1482
ret = fchown(seckey_fd, uid, gid);
1484
perror_plus("fchown");
1488
TEMP_FAILURE_RETRY(close(seckey_fd));
1491
int pubkey_fd = open(PATHDIR "/" PUBKEY, O_RDONLY);
1492
if(pubkey_fd == -1){
1493
perror_plus("open");
1495
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1497
perror_plus("fstat");
1499
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1500
ret = fchown(pubkey_fd, uid, gid);
1502
perror_plus("fchown");
1506
TEMP_FAILURE_RETRY(close(pubkey_fd));
1509
/* Lower privileges */
1513
perror_plus("seteuid");
1518
avahi_set_log_function(empty_log);
1521
if(interface[0] == '\0'){
1522
struct dirent **direntries;
1523
ret = scandir(sys_class_net, &direntries, good_interface,
1526
/* Pick the first good interface */
1527
interface = strdup(direntries[0]->d_name);
1529
fprintf(stderr, "Using interface \"%s\"\n", interface);
1531
if(interface == NULL){
1532
perror_plus("malloc");
1534
exitcode = EXIT_FAILURE;
1540
fprintf(stderr, "Could not find a network interface\n");
1541
exitcode = EXIT_FAILURE;
1546
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1547
from the signal handler */
1548
/* Initialize the pseudo-RNG for Avahi */
1549
srand((unsigned int) time(NULL));
1550
mc.simple_poll = avahi_simple_poll_new();
1551
if(mc.simple_poll == NULL){
1552
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1553
exitcode = EX_UNAVAILABLE;
1557
sigemptyset(&sigterm_action.sa_mask);
1558
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1560
perror_plus("sigaddset");
1561
exitcode = EX_OSERR;
1564
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1566
perror_plus("sigaddset");
1567
exitcode = EX_OSERR;
1570
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1572
perror_plus("sigaddset");
1573
exitcode = EX_OSERR;
1576
/* Need to check if the handler is SIG_IGN before handling:
1577
| [[info:libc:Initial Signal Actions]] |
1578
| [[info:libc:Basic Signal Handling]] |
1580
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1582
perror_plus("sigaction");
1585
if(old_sigterm_action.sa_handler != SIG_IGN){
1586
ret = sigaction(SIGINT, &sigterm_action, NULL);
1588
perror_plus("sigaction");
1589
exitcode = EX_OSERR;
1593
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1595
perror_plus("sigaction");
1598
if(old_sigterm_action.sa_handler != SIG_IGN){
1599
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1601
perror_plus("sigaction");
1602
exitcode = EX_OSERR;
1606
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1608
perror_plus("sigaction");
1611
if(old_sigterm_action.sa_handler != SIG_IGN){
1612
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1614
perror_plus("sigaction");
1615
exitcode = EX_OSERR;
1620
/* If the interface is down, bring it up */
1621
if(strcmp(interface, "none") != 0){
934
1622
if_index = (AvahiIfIndex) if_nametoindex(interface);
935
1623
if(if_index == 0){
936
1624
fprintf(stderr, "No such interface: \"%s\"\n", interface);
940
if(connect_to != NULL){
941
/* Connect directly, do not use Zeroconf */
942
/* (Mainly meant for debugging) */
943
char *address = strrchr(connect_to, ':');
945
fprintf(stderr, "No colon in address\n");
946
exitcode = EXIT_FAILURE;
950
uint16_t port = (uint16_t) strtol(address+1, NULL, 10);
952
perror("Bad port number");
953
exitcode = EXIT_FAILURE;
957
address = connect_to;
958
ret = start_mandos_communication(address, port, if_index, &mc);
960
exitcode = EXIT_FAILURE;
962
exitcode = EXIT_SUCCESS;
968
avahi_set_log_function(empty_log);
971
/* Initialize the pseudo-RNG for Avahi */
972
srand((unsigned int) time(NULL));
974
/* Allocate main Avahi loop object */
975
mc.simple_poll = avahi_simple_poll_new();
976
if (mc.simple_poll == NULL) {
977
fprintf(stderr, "Avahi: Failed to create simple poll"
979
exitcode = EXIT_FAILURE;
984
AvahiServerConfig config;
985
/* Do not publish any local Zeroconf records */
986
avahi_server_config_init(&config);
987
config.publish_hinfo = 0;
988
config.publish_addresses = 0;
989
config.publish_workstation = 0;
990
config.publish_domain = 0;
992
/* Allocate a new server */
993
mc.server = avahi_server_new(avahi_simple_poll_get
994
(mc.simple_poll), &config, NULL,
997
/* Free the Avahi configuration data */
998
avahi_server_config_free(&config);
1001
/* Check if creating the Avahi server object succeeded */
1002
if (mc.server == NULL) {
1003
fprintf(stderr, "Failed to create Avahi server: %s\n",
1004
avahi_strerror(error));
1005
exitcode = EXIT_FAILURE;
1009
/* Create the Avahi service browser */
1010
sb = avahi_s_service_browser_new(mc.server, if_index,
1012
"_mandos._tcp", NULL, 0,
1013
browse_callback, &mc);
1015
fprintf(stderr, "Failed to create service browser: %s\n",
1016
avahi_strerror(avahi_server_errno(mc.server)));
1017
exitcode = EXIT_FAILURE;
1021
/* Run the main loop */
1024
fprintf(stderr, "Starting Avahi loop search\n");
1027
avahi_simple_poll_loop(mc.simple_poll);
1625
exitcode = EX_UNAVAILABLE;
1633
/* Re-raise priviliges */
1637
perror_plus("seteuid");
1641
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1642
messages about the network interface to mess up the prompt */
1643
ret = klogctl(8, NULL, 5);
1644
bool restore_loglevel = true;
1646
restore_loglevel = false;
1647
perror_plus("klogctl");
1649
#endif /* __linux__ */
1651
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1653
perror_plus("socket");
1654
exitcode = EX_OSERR;
1656
if(restore_loglevel){
1657
ret = klogctl(7, NULL, 0);
1659
perror_plus("klogctl");
1662
#endif /* __linux__ */
1663
/* Lower privileges */
1667
perror_plus("seteuid");
1671
strcpy(network.ifr_name, interface);
1672
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1674
perror_plus("ioctl SIOCGIFFLAGS");
1676
if(restore_loglevel){
1677
ret = klogctl(7, NULL, 0);
1679
perror_plus("klogctl");
1682
#endif /* __linux__ */
1683
exitcode = EX_OSERR;
1684
/* Lower privileges */
1688
perror_plus("seteuid");
1692
if((network.ifr_flags & IFF_UP) == 0){
1693
network.ifr_flags |= IFF_UP;
1694
take_down_interface = true;
1695
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1697
take_down_interface = false;
1698
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1699
exitcode = EX_OSERR;
1701
if(restore_loglevel){
1702
ret = klogctl(7, NULL, 0);
1704
perror_plus("klogctl");
1707
#endif /* __linux__ */
1708
/* Lower privileges */
1712
perror_plus("seteuid");
1717
/* Sleep checking until interface is running.
1718
Check every 0.25s, up to total time of delay */
1719
for(int i=0; i < delay * 4; i++){
1720
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1722
perror_plus("ioctl SIOCGIFFLAGS");
1723
} else if(network.ifr_flags & IFF_RUNNING){
1726
struct timespec sleeptime = { .tv_nsec = 250000000 };
1727
ret = nanosleep(&sleeptime, NULL);
1728
if(ret == -1 and errno != EINTR){
1729
perror_plus("nanosleep");
1732
if(not take_down_interface){
1733
/* We won't need the socket anymore */
1734
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1736
perror_plus("close");
1740
if(restore_loglevel){
1741
/* Restores kernel loglevel to default */
1742
ret = klogctl(7, NULL, 0);
1744
perror_plus("klogctl");
1747
#endif /* __linux__ */
1748
/* Lower privileges */
1750
if(take_down_interface){
1751
/* Lower privileges */
1754
perror_plus("seteuid");
1757
/* Lower privileges permanently */
1760
perror_plus("setuid");
1769
ret = init_gnutls_global(pubkey, seckey);
1771
fprintf(stderr, "init_gnutls_global failed\n");
1772
exitcode = EX_UNAVAILABLE;
1775
gnutls_initialized = true;
1782
if(mkdtemp(tempdir) == NULL){
1783
perror_plus("mkdtemp");
1786
tempdir_created = true;
1792
if(not init_gpgme(pubkey, seckey, tempdir)){
1793
fprintf(stderr, "init_gpgme failed\n");
1794
exitcode = EX_UNAVAILABLE;
1797
gpgme_initialized = true;
1804
if(connect_to != NULL){
1805
/* Connect directly, do not use Zeroconf */
1806
/* (Mainly meant for debugging) */
1807
char *address = strrchr(connect_to, ':');
1808
if(address == NULL){
1809
fprintf(stderr, "No colon in address\n");
1810
exitcode = EX_USAGE;
1820
tmpmax = strtoimax(address+1, &tmp, 10);
1821
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1822
or tmpmax != (uint16_t)tmpmax){
1823
fprintf(stderr, "Bad port number\n");
1824
exitcode = EX_USAGE;
1832
port = (uint16_t)tmpmax;
1834
/* Colon in address indicates IPv6 */
1836
if(strchr(connect_to, ':') != NULL){
1838
/* Accept [] around IPv6 address - see RFC 5952 */
1839
if(connect_to[0] == '[' and address[-1] == ']')
1847
address = connect_to;
1853
while(not quit_now){
1854
ret = start_mandos_communication(address, port, if_index, af);
1855
if(quit_now or ret == 0){
1859
fprintf(stderr, "Retrying in %d seconds\n",
1860
(int)retry_interval);
1862
sleep((int)retry_interval);
1866
exitcode = EXIT_SUCCESS;
1877
AvahiServerConfig config;
1878
/* Do not publish any local Zeroconf records */
1879
avahi_server_config_init(&config);
1880
config.publish_hinfo = 0;
1881
config.publish_addresses = 0;
1882
config.publish_workstation = 0;
1883
config.publish_domain = 0;
1885
/* Allocate a new server */
1886
mc.server = avahi_server_new(avahi_simple_poll_get
1887
(mc.simple_poll), &config, NULL,
1890
/* Free the Avahi configuration data */
1891
avahi_server_config_free(&config);
1894
/* Check if creating the Avahi server object succeeded */
1895
if(mc.server == NULL){
1896
fprintf(stderr, "Failed to create Avahi server: %s\n",
1897
avahi_strerror(error));
1898
exitcode = EX_UNAVAILABLE;
1906
/* Create the Avahi service browser */
1907
sb = avahi_s_service_browser_new(mc.server, if_index,
1908
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
1909
NULL, 0, browse_callback, NULL);
1911
fprintf(stderr, "Failed to create service browser: %s\n",
1912
avahi_strerror(avahi_server_errno(mc.server)));
1913
exitcode = EX_UNAVAILABLE;
1921
/* Run the main loop */
1924
fprintf(stderr, "Starting Avahi loop search\n");
1927
ret = avahi_loop_with_timeout(mc.simple_poll,
1928
(int)(retry_interval * 1000));
1930
fprintf(stderr, "avahi_loop_with_timeout exited %s\n",
1931
(ret == 0) ? "successfully" : "with error");
1032
fprintf(stderr, "%s exiting\n", argv[0]);
1035
/* Cleanup things */
1037
avahi_s_service_browser_free(sb);
1039
if (mc.server != NULL)
1040
avahi_server_free(mc.server);
1042
if (mc.simple_poll != NULL)
1043
avahi_simple_poll_free(mc.simple_poll);
1044
free(pubkeyfilename);
1045
free(seckeyfilename);
1047
if (gnutls_initalized){
1048
gnutls_certificate_free_credentials(mc.cred);
1049
gnutls_global_deinit ();
1937
fprintf(stderr, "%s exiting\n", argv[0]);
1940
/* Cleanup things */
1942
avahi_s_service_browser_free(sb);
1944
if(mc.server != NULL)
1945
avahi_server_free(mc.server);
1947
if(mc.simple_poll != NULL)
1948
avahi_simple_poll_free(mc.simple_poll);
1950
if(gnutls_initialized){
1951
gnutls_certificate_free_credentials(mc.cred);
1952
gnutls_global_deinit();
1953
gnutls_dh_params_deinit(mc.dh_params);
1956
if(gpgme_initialized){
1957
gpgme_release(mc.ctx);
1960
/* Cleans up the circular linked list of Mandos servers the client
1962
if(mc.current_server != NULL){
1963
mc.current_server->prev->next = NULL;
1964
while(mc.current_server != NULL){
1965
server *next = mc.current_server->next;
1966
free(mc.current_server);
1967
mc.current_server = next;
1971
/* Take down the network interface */
1972
if(take_down_interface){
1973
/* Re-raise priviliges */
1977
perror_plus("seteuid");
1980
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1982
perror_plus("ioctl SIOCGIFFLAGS");
1983
} else if(network.ifr_flags & IFF_UP) {
1984
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1985
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1987
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1990
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1992
perror_plus("close");
1994
/* Lower privileges permanently */
1998
perror_plus("setuid");
2003
/* Removes the GPGME temp directory and all files inside */
2004
if(tempdir_created){
2005
struct dirent **direntries = NULL;
2006
struct dirent *direntry = NULL;
2007
ret = scandir(tempdir, &direntries, notdotentries, alphasort);
2009
for(int i = 0; i < ret; i++){
2010
direntry = direntries[i];
2011
char *fullname = NULL;
2012
ret = asprintf(&fullname, "%s/%s", tempdir,
2015
perror_plus("asprintf");
2018
ret = remove(fullname);
2020
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
2027
/* need to be cleaned even if ret == 0 because man page doesn't
2031
perror_plus("scandir");
2033
ret = rmdir(tempdir);
2034
if(ret == -1 and errno != ENOENT){
2035
perror_plus("rmdir");
2040
sigemptyset(&old_sigterm_action.sa_mask);
2041
old_sigterm_action.sa_handler = SIG_DFL;
2042
ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
2043
&old_sigterm_action,
2046
perror_plus("sigaction");
2049
ret = raise(signal_received);
2050
} while(ret != 0 and errno == EINTR);
2052
perror_plus("raise");
2055
TEMP_FAILURE_RETRY(pause());