865
1101
case AVAHI_BROWSER_ALL_FOR_NOW:
866
1102
case AVAHI_BROWSER_CACHE_EXHAUSTED:
868
fprintf(stderr, "No Mandos server found, still searching...\n");
1104
fprintf_plus(stderr, "No Mandos server found, still"
874
static void handle_sigterm(__attribute__((unused)) int sig){
1111
/* Signal handler that stops main loop after SIGTERM */
1112
static void handle_sigterm(int sig){
1117
signal_received = sig;
875
1118
int old_errno = errno;
876
avahi_simple_poll_quit(mc.simple_poll);
1119
/* set main loop to exit */
1120
if(mc.simple_poll != NULL){
1121
avahi_simple_poll_quit(mc.simple_poll);
1126
bool get_flags(const char *ifname, struct ifreq *ifr){
1130
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1133
perror_plus("socket");
1137
strcpy(ifr->ifr_name, ifname);
1138
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1142
perror_plus("ioctl SIOCGIFFLAGS");
1150
bool good_flags(const char *ifname, const struct ifreq *ifr){
1152
/* Reject the loopback device */
1153
if(ifr->ifr_flags & IFF_LOOPBACK){
1155
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1160
/* Accept point-to-point devices only if connect_to is specified */
1161
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1163
fprintf_plus(stderr, "Accepting point-to-point interface"
1164
" \"%s\"\n", ifname);
1168
/* Otherwise, reject non-broadcast-capable devices */
1169
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1171
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1172
" \"%s\"\n", ifname);
1176
/* Reject non-ARP interfaces (including dummy interfaces) */
1177
if(ifr->ifr_flags & IFF_NOARP){
1179
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1185
/* Accept this device */
1187
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1193
* This function determines if a directory entry in /sys/class/net
1194
* corresponds to an acceptable network device.
1195
* (This function is passed to scandir(3) as a filter function.)
1197
int good_interface(const struct dirent *if_entry){
1198
if(if_entry->d_name[0] == '.'){
1203
if(not get_flags(if_entry->d_name, &ifr)){
1205
fprintf_plus(stderr, "Failed to get flags for interface "
1206
"\"%s\"\n", if_entry->d_name);
1211
if(not good_flags(if_entry->d_name, &ifr)){
1218
* This function determines if a network interface is up.
1220
bool interface_is_up(const char *interface){
1222
if(not get_flags(interface, &ifr)){
1224
fprintf_plus(stderr, "Failed to get flags for interface "
1225
"\"%s\"\n", interface);
1230
return (bool)(ifr.ifr_flags & IFF_UP);
1234
* This function determines if a network interface is running
1236
bool interface_is_running(const char *interface){
1238
if(not get_flags(interface, &ifr)){
1240
fprintf_plus(stderr, "Failed to get flags for interface "
1241
"\"%s\"\n", interface);
1246
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1249
int notdotentries(const struct dirent *direntry){
1250
/* Skip "." and ".." */
1251
if(direntry->d_name[0] == '.'
1252
and (direntry->d_name[1] == '\0'
1253
or (direntry->d_name[1] == '.'
1254
and direntry->d_name[2] == '\0'))){
1260
/* Is this directory entry a runnable program? */
1261
int runnable_hook(const struct dirent *direntry){
1266
if((direntry->d_name)[0] == '\0'){
1271
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1272
"abcdefghijklmnopqrstuvwxyz"
1275
if((direntry->d_name)[sret] != '\0'){
1276
/* Contains non-allowed characters */
1278
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1284
char *fullname = NULL;
1285
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1287
perror_plus("asprintf");
1291
ret = stat(fullname, &st);
1294
perror_plus("Could not stat hook");
1298
if(not (S_ISREG(st.st_mode))){
1299
/* Not a regular file */
1301
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1306
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1307
/* Not executable */
1309
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1315
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1321
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1323
struct timespec now;
1324
struct timespec waited_time;
1325
intmax_t block_time;
1328
if(mc.current_server == NULL){
1330
fprintf_plus(stderr, "Wait until first server is found."
1333
ret = avahi_simple_poll_iterate(s, -1);
1336
fprintf_plus(stderr, "Check current_server if we should run"
1339
/* the current time */
1340
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1342
perror_plus("clock_gettime");
1345
/* Calculating in ms how long time between now and server
1346
who we visted longest time ago. Now - last seen. */
1347
waited_time.tv_sec = (now.tv_sec
1348
- mc.current_server->last_seen.tv_sec);
1349
waited_time.tv_nsec = (now.tv_nsec
1350
- mc.current_server->last_seen.tv_nsec);
1351
/* total time is 10s/10,000ms.
1352
Converting to s from ms by dividing by 1,000,
1353
and ns to ms by dividing by 1,000,000. */
1354
block_time = ((retry_interval
1355
- ((intmax_t)waited_time.tv_sec * 1000))
1356
- ((intmax_t)waited_time.tv_nsec / 1000000));
1359
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1363
if(block_time <= 0){
1364
ret = start_mandos_communication(mc.current_server->ip,
1365
mc.current_server->port,
1366
mc.current_server->if_index,
1367
mc.current_server->af);
1369
avahi_simple_poll_quit(mc.simple_poll);
1372
ret = clock_gettime(CLOCK_MONOTONIC,
1373
&mc.current_server->last_seen);
1375
perror_plus("clock_gettime");
1378
mc.current_server = mc.current_server->next;
1379
block_time = 0; /* Call avahi to find new Mandos
1380
servers, but don't block */
1383
ret = avahi_simple_poll_iterate(s, (int)block_time);
1386
if (ret > 0 or errno != EINTR){
1387
return (ret != 1) ? ret : 0;
1393
/* Set effective uid to 0, return errno */
1394
error_t raise_privileges(void){
1395
error_t old_errno = errno;
1396
error_t ret_errno = 0;
1397
if(seteuid(0) == -1){
1399
perror_plus("seteuid");
1405
/* Set effective and real user ID to 0. Return errno. */
1406
error_t raise_privileges_permanently(void){
1407
error_t old_errno = errno;
1408
error_t ret_errno = raise_privileges();
1413
if(setuid(0) == -1){
1415
perror_plus("seteuid");
1421
/* Set effective user ID to unprivileged saved user ID */
1422
error_t lower_privileges(void){
1423
error_t old_errno = errno;
1424
error_t ret_errno = 0;
1425
if(seteuid(uid) == -1){
1427
perror_plus("seteuid");
1433
/* Lower privileges permanently */
1434
error_t lower_privileges_permanently(void){
1435
error_t old_errno = errno;
1436
error_t ret_errno = 0;
1437
if(setuid(uid) == -1){
1439
perror_plus("setuid");
1445
bool run_network_hooks(const char *mode, const char *interface,
1447
struct dirent **direntries;
1448
struct dirent *direntry;
1450
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1453
if(errno == ENOENT){
1455
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1456
" found\n", hookdir);
1459
perror_plus("scandir");
1462
int devnull = open("/dev/null", O_RDONLY);
1463
for(int i = 0; i < numhooks; i++){
1464
direntry = direntries[i];
1465
char *fullname = NULL;
1466
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1468
perror_plus("asprintf");
1472
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1475
pid_t hook_pid = fork();
1478
/* Raise privileges */
1479
raise_privileges_permanently();
1484
perror_plus("setgid");
1486
/* Reset supplementary groups */
1488
ret = setgroups(0, NULL);
1490
perror_plus("setgroups");
1492
dup2(devnull, STDIN_FILENO);
1494
dup2(STDERR_FILENO, STDOUT_FILENO);
1495
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1497
perror_plus("setenv");
1500
ret = setenv("DEVICE", interface, 1);
1502
perror_plus("setenv");
1505
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1507
perror_plus("setenv");
1510
ret = setenv("MODE", mode, 1);
1512
perror_plus("setenv");
1516
ret = asprintf(&delaystring, "%f", delay);
1518
perror_plus("asprintf");
1521
ret = setenv("DELAY", delaystring, 1);
1524
perror_plus("setenv");
1528
if(connect_to != NULL){
1529
ret = setenv("CONNECT", connect_to, 1);
1531
perror_plus("setenv");
1535
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1536
perror_plus("execl");
1537
_exit(EXIT_FAILURE);
1541
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1542
perror_plus("waitpid");
1546
if(WIFEXITED(status)){
1547
if(WEXITSTATUS(status) != 0){
1548
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1549
" with status %d\n", direntry->d_name,
1550
WEXITSTATUS(status));
1554
} else if(WIFSIGNALED(status)){
1555
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1556
" signal %d\n", direntry->d_name,
1561
fprintf_plus(stderr, "Warning: network hook \"%s\""
1562
" crashed\n", direntry->d_name);
1569
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1578
error_t bring_up_interface(const char *const interface,
1581
error_t old_errno = errno;
1582
error_t ret_errno = 0;
1583
int ret, ret_setflags;
1584
struct ifreq network;
1585
unsigned int if_index = if_nametoindex(interface);
1587
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1597
if(not interface_is_up(interface)){
1598
if(not get_flags(interface, &network) and debug){
1600
fprintf_plus(stderr, "Failed to get flags for interface "
1601
"\"%s\"\n", interface);
1604
network.ifr_flags |= IFF_UP;
1606
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1609
perror_plus("socket");
1621
fprintf_plus(stderr, "Bringing up interface \"%s\"\n",
1625
/* Raise priviliges */
1629
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1630
messages about the network interface to mess up the prompt */
1631
int ret_linux = klogctl(8, NULL, 5);
1632
bool restore_loglevel = true;
1633
if(ret_linux == -1){
1634
restore_loglevel = false;
1635
perror_plus("klogctl");
1637
#endif /* __linux__ */
1638
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1641
if(restore_loglevel){
1642
ret_linux = klogctl(7, NULL, 0);
1643
if(ret_linux == -1){
1644
perror_plus("klogctl");
1647
#endif /* __linux__ */
1649
/* Lower privileges */
1652
/* Close the socket */
1653
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1655
perror_plus("close");
1658
if(ret_setflags == -1){
1660
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1665
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1669
/* Sleep checking until interface is running.
1670
Check every 0.25s, up to total time of delay */
1671
for(int i=0; i < delay * 4; i++){
1672
if(interface_is_running(interface)){
1675
struct timespec sleeptime = { .tv_nsec = 250000000 };
1676
ret = nanosleep(&sleeptime, NULL);
1677
if(ret == -1 and errno != EINTR){
1678
perror_plus("nanosleep");
1686
error_t take_down_interface(const char *const interface){
1688
error_t old_errno = errno;
1689
error_t ret_errno = 0;
1690
int ret, ret_setflags;
1691
struct ifreq network;
1692
unsigned int if_index = if_nametoindex(interface);
1694
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1698
if(interface_is_up(interface)){
1699
if(not get_flags(interface, &network) and debug){
1701
fprintf_plus(stderr, "Failed to get flags for interface "
1702
"\"%s\"\n", interface);
1705
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1707
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1710
perror_plus("socket");
1716
fprintf_plus(stderr, "Taking down interface \"%s\"\n",
1720
/* Raise priviliges */
1723
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1726
/* Lower privileges */
1729
/* Close the socket */
1730
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1732
perror_plus("close");
1735
if(ret_setflags == -1){
1737
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1742
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
880
1750
int main(int argc, char *argv[]){
881
1751
AvahiSServiceBrowser *sb = NULL;
884
1754
intmax_t tmpmax;
886
1756
int exitcode = EXIT_SUCCESS;
887
const char *interface = "eth0";
888
struct ifreq network;
892
char *connect_to = NULL;
1757
char *interfaces = NULL;
1758
size_t interfaces_size = 0;
1759
char *interfaces_to_take_down = NULL;
1760
size_t interfaces_to_take_down_size = 0;
893
1761
char tempdir[] = "/tmp/mandosXXXXXX";
894
1762
bool tempdir_created = false;
895
1763
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
896
1764
const char *seckey = PATHDIR "/" SECKEY;
897
1765
const char *pubkey = PATHDIR "/" PUBKEY;
1766
char *interfaces_hooks = NULL;
1767
size_t interfaces_hooks_size = 0;
899
/* Initialize Mandos context */
900
mc = (mandos_context){ .simple_poll = NULL, .server = NULL,
901
.dh_bits = 1024, .priority = "SECURE256"
902
":!CTYPE-X.509:+CTYPE-OPENPGP" };
903
1769
bool gnutls_initialized = false;
904
1770
bool gpgme_initialized = false;
907
struct sigaction old_sigterm_action;
1772
double retry_interval = 10; /* 10s between trying a server and
1773
retrying the same server again */
1775
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
908
1776
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1781
/* Lower any group privileges we might have, just to be safe */
1785
perror_plus("setgid");
1788
/* Lower user privileges (temporarily) */
1792
perror_plus("seteuid");
911
1800
struct argp_option options[] = {
912
1801
{ .name = "debug", .key = 128,
975
1886
mc.priority = arg;
977
1888
case 131: /* --delay */
978
ret = sscanf(arg, "%lf%n", &delay, &numchars);
979
if(ret < 1 or arg[numchars] != '\0'){
980
fprintf(stderr, "Bad delay\n");
1890
delay = strtof(arg, &tmp);
1891
if(errno != 0 or tmp == arg or *tmp != '\0'){
1892
argp_error(state, "Bad delay");
1894
case 132: /* --retry */
1896
retry_interval = strtod(arg, &tmp);
1897
if(errno != 0 or tmp == arg or *tmp != '\0'
1898
or (retry_interval * 1000) > INT_MAX
1899
or retry_interval < 0){
1900
argp_error(state, "Bad retry interval");
1903
case 133: /* --network-hook-dir */
1907
* These reproduce what we would get without ARGP_NO_HELP
1909
case '?': /* --help */
1910
argp_state_help(state, state->out_stream,
1911
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
1912
& ~(unsigned int)ARGP_HELP_EXIT_OK);
1913
case -3: /* --usage */
1914
argp_state_help(state, state->out_stream,
1915
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1916
case 'V': /* --version */
1917
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1918
exit(argp_err_exit_status);
989
1921
return ARGP_ERR_UNKNOWN;
994
1926
struct argp argp = { .options = options, .parser = parse_opt,
996
1928
.doc = "Mandos client -- Get and decrypt"
997
1929
" passwords from a Mandos server" };
998
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
999
if(ret == ARGP_ERR_UNKNOWN){
1000
fprintf(stderr, "Unknown error while parsing arguments\n");
1001
exitcode = EXIT_FAILURE;
1930
ret = argp_parse(&argp, argc, argv,
1931
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
1938
perror_plus("argp_parse");
1939
exitcode = EX_OSERR;
1942
exitcode = EX_USAGE;
1006
/* If the interface is down, bring it up */
1007
if(interface[0] != '\0'){
1009
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1010
messages to mess up the prompt */
1011
ret = klogctl(8, NULL, 5);
1012
bool restore_loglevel = true;
1014
restore_loglevel = false;
1019
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1022
exitcode = EXIT_FAILURE;
1024
if(restore_loglevel){
1025
ret = klogctl(7, NULL, 0);
1033
strcpy(network.ifr_name, interface);
1034
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1036
perror("ioctl SIOCGIFFLAGS");
1038
if(restore_loglevel){
1039
ret = klogctl(7, NULL, 0);
1045
exitcode = EXIT_FAILURE;
1048
if((network.ifr_flags & IFF_UP) == 0){
1049
network.ifr_flags |= IFF_UP;
1050
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1948
/* Work around Debian bug #633582:
1949
<http://bugs.debian.org/633582> */
1951
/* Re-raise priviliges */
1952
if(raise_privileges() == 0){
1955
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1956
int seckey_fd = open(seckey, O_RDONLY);
1957
if(seckey_fd == -1){
1958
perror_plus("open");
1960
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1962
perror_plus("fstat");
1964
if(S_ISREG(st.st_mode)
1965
and st.st_uid == 0 and st.st_gid == 0){
1966
ret = fchown(seckey_fd, uid, gid);
1968
perror_plus("fchown");
1972
TEMP_FAILURE_RETRY(close(seckey_fd));
1976
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1977
int pubkey_fd = open(pubkey, O_RDONLY);
1978
if(pubkey_fd == -1){
1979
perror_plus("open");
1981
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1983
perror_plus("fstat");
1985
if(S_ISREG(st.st_mode)
1986
and st.st_uid == 0 and st.st_gid == 0){
1987
ret = fchown(pubkey_fd, uid, gid);
1989
perror_plus("fchown");
1993
TEMP_FAILURE_RETRY(close(pubkey_fd));
1997
/* Lower privileges */
1052
perror("ioctl SIOCSIFFLAGS");
1053
exitcode = EXIT_FAILURE;
1055
if(restore_loglevel){
1056
ret = klogctl(7, NULL, 0);
2001
perror_plus("seteuid");
2006
/* Remove empty interface names */
2008
char *interface = NULL;
2009
while((interface = argz_next(interfaces, interfaces_size,
2011
if(if_nametoindex(interface) == 0){
2012
if(interface[0] != '\0' and strcmp(interface, "none") != 0){
2013
fprintf_plus(stderr, "Not using nonexisting interface"
2014
" \"%s\"\n", interface);
2016
argz_delete(&interfaces, &interfaces_size, interface);
2022
/* Run network hooks */
2025
if(interfaces != NULL){
2026
interfaces_hooks = malloc(interfaces_size);
2027
if(interfaces_hooks == NULL){
2028
perror_plus("malloc");
1065
/* sleep checking until interface is running */
1066
for(int i=0; i < delay * 4; i++){
1067
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1069
perror("ioctl SIOCGIFFLAGS");
1070
} else if(network.ifr_flags & IFF_RUNNING){
1073
struct timespec sleeptime = { .tv_nsec = 250000000 };
1074
ret = nanosleep(&sleeptime, NULL);
1075
if(ret == -1 and errno != EINTR){
1076
perror("nanosleep");
1079
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1084
if(restore_loglevel){
1085
/* Restores kernel loglevel to default */
1086
ret = klogctl(7, NULL, 0);
2031
memcpy(interfaces_hooks, interfaces, interfaces_size);
2032
interfaces_hooks_size = interfaces_size;
2033
argz_stringify(interfaces_hooks, interfaces_hooks_size,
2036
if(not run_network_hooks("start", interfaces_hooks != NULL ?
2037
interfaces_hooks : "", delay)){
2043
avahi_set_log_function(empty_log);
2046
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
2047
from the signal handler */
2048
/* Initialize the pseudo-RNG for Avahi */
2049
srand((unsigned int) time(NULL));
2050
mc.simple_poll = avahi_simple_poll_new();
2051
if(mc.simple_poll == NULL){
2052
fprintf_plus(stderr,
2053
"Avahi: Failed to create simple poll object.\n");
2054
exitcode = EX_UNAVAILABLE;
2058
sigemptyset(&sigterm_action.sa_mask);
2059
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
2061
perror_plus("sigaddset");
2062
exitcode = EX_OSERR;
2065
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
2067
perror_plus("sigaddset");
2068
exitcode = EX_OSERR;
2071
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
2073
perror_plus("sigaddset");
2074
exitcode = EX_OSERR;
2077
/* Need to check if the handler is SIG_IGN before handling:
2078
| [[info:libc:Initial Signal Actions]] |
2079
| [[info:libc:Basic Signal Handling]] |
2081
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
2083
perror_plus("sigaction");
2086
if(old_sigterm_action.sa_handler != SIG_IGN){
2087
ret = sigaction(SIGINT, &sigterm_action, NULL);
2089
perror_plus("sigaction");
2090
exitcode = EX_OSERR;
2094
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
2096
perror_plus("sigaction");
2099
if(old_sigterm_action.sa_handler != SIG_IGN){
2100
ret = sigaction(SIGHUP, &sigterm_action, NULL);
2102
perror_plus("sigaction");
2103
exitcode = EX_OSERR;
2107
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
2109
perror_plus("sigaction");
2112
if(old_sigterm_action.sa_handler != SIG_IGN){
2113
ret = sigaction(SIGTERM, &sigterm_action, NULL);
2115
perror_plus("sigaction");
2116
exitcode = EX_OSERR;
2121
/* If no interfaces were specified, make a list */
2122
if(interfaces == NULL){
2123
struct dirent **direntries;
2124
/* Look for any good interfaces */
2125
ret = scandir(sys_class_net, &direntries, good_interface,
2128
/* Add all found interfaces to interfaces list */
2129
for(int i = 0; i < ret; ++i){
2130
ret_errno = argz_add(&interfaces, &interfaces_size,
2131
direntries[i]->d_name);
2133
perror_plus("argz_add");
2137
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2138
direntries[i]->d_name);
2144
fprintf_plus(stderr, "Could not find a network interface\n");
2145
exitcode = EXIT_FAILURE;
2150
/* If we only got one interface, explicitly use only that one */
2151
if(argz_count(interfaces, interfaces_size) == 1){
2153
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2156
if_index = (AvahiIfIndex)if_nametoindex(interfaces);
2159
/* Bring up interfaces which are down */
2160
if(not (argz_count(interfaces, interfaces_size) == 1
2161
and strcmp(interfaces, "none") == 0)){
2162
char *interface = NULL;
2163
while((interface = argz_next(interfaces, interfaces_size,
2165
bool interface_was_up = interface_is_up(interface);
2166
ret = bring_up_interface(interface, delay);
2167
if(not interface_was_up){
2170
perror_plus("Failed to bring up interface");
2172
ret_errno = argz_add(&interfaces_to_take_down,
2173
&interfaces_to_take_down_size,
2180
interfaces_size = 0;
2181
if(debug and (interfaces_to_take_down == NULL)){
2182
fprintf_plus(stderr, "No interfaces were brought up\n");
1108
2190
ret = init_gnutls_global(pubkey, seckey);
1110
fprintf(stderr, "init_gnutls_global failed\n");
1111
exitcode = EXIT_FAILURE;
2192
fprintf_plus(stderr, "init_gnutls_global failed\n");
2193
exitcode = EX_UNAVAILABLE;
1114
2196
gnutls_initialized = true;
1117
2203
if(mkdtemp(tempdir) == NULL){
2204
perror_plus("mkdtemp");
1121
2207
tempdir_created = true;
1123
2213
if(not init_gpgme(pubkey, seckey, tempdir)){
1124
fprintf(stderr, "init_gpgme failed\n");
1125
exitcode = EXIT_FAILURE;
2214
fprintf_plus(stderr, "init_gpgme failed\n");
2215
exitcode = EX_UNAVAILABLE;
1128
2218
gpgme_initialized = true;
1131
if(interface[0] != '\0'){
1132
if_index = (AvahiIfIndex) if_nametoindex(interface);
1134
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1135
exitcode = EXIT_FAILURE;
1140
2225
if(connect_to != NULL){
1141
2226
/* Connect directly, do not use Zeroconf */
1142
2227
/* (Mainly meant for debugging) */
1143
2228
char *address = strrchr(connect_to, ':');
1144
2230
if(address == NULL){
1145
fprintf(stderr, "No colon in address\n");
1146
exitcode = EXIT_FAILURE;
1150
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1151
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1152
or address[numchars+1] != '\0'){
1153
fprintf(stderr, "Bad port number\n");
1154
exitcode = EXIT_FAILURE;
1157
port = (uint16_t)tmpmax;
2231
fprintf_plus(stderr, "No colon in address\n");
2232
exitcode = EX_USAGE;
2242
tmpmax = strtoimax(address+1, &tmp, 10);
2243
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2244
or tmpmax != (in_port_t)tmpmax){
2245
fprintf_plus(stderr, "Bad port number\n");
2246
exitcode = EX_USAGE;
2254
port = (in_port_t)tmpmax;
1158
2255
*address = '\0';
1159
address = connect_to;
1160
2256
/* Colon in address indicates IPv6 */
1162
if(strchr(address, ':') != NULL){
2258
if(strchr(connect_to, ':') != NULL){
2260
/* Accept [] around IPv6 address - see RFC 5952 */
2261
if(connect_to[0] == '[' and address[-1] == ']')
1167
ret = start_mandos_communication(address, port, if_index, af);
1169
exitcode = EXIT_FAILURE;
2269
address = connect_to;
2275
while(not quit_now){
2276
ret = start_mandos_communication(address, port, if_index, af);
2277
if(quit_now or ret == 0){
2281
fprintf_plus(stderr, "Retrying in %d seconds\n",
2282
(int)retry_interval);
2284
sleep((int)retry_interval);
1171
2288
exitcode = EXIT_SUCCESS;
1177
avahi_set_log_function(empty_log);
1180
/* Initialize the pseudo-RNG for Avahi */
1181
srand((unsigned int) time(NULL));
1183
/* Allocate main Avahi loop object */
1184
mc.simple_poll = avahi_simple_poll_new();
1185
if(mc.simple_poll == NULL){
1186
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1187
exitcode = EXIT_FAILURE;