26
26
* along with this program. If not, see
27
27
* <http://www.gnu.org/licenses/>.
29
* Contact the authors at <mandos@fukt.bsnet.se>.
29
* Contact the authors at <mandos@recompile.se>.
32
32
/* Needed by GPGME, specifically gpgme_data_seek() */
33
#ifndef _LARGEFILE_SOURCE
33
34
#define _LARGEFILE_SOURCE
36
#ifndef _FILE_OFFSET_BITS
34
37
#define _FILE_OFFSET_BITS 64
36
40
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
38
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
39
stdout, ferror(), sscanf(),
43
stdout, ferror(), remove() */
41
44
#include <stdint.h> /* uint16_t, uint32_t */
42
45
#include <stddef.h> /* NULL, size_t, ssize_t */
43
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
45
48
#include <stdbool.h> /* bool, false, true */
46
49
#include <string.h> /* memset(), strcmp(), strlen(),
47
50
strerror(), asprintf(), strcpy() */
56
59
#include <fcntl.h> /* open() */
57
60
#include <dirent.h> /* opendir(), struct dirent, readdir()
59
#include <inttypes.h> /* PRIu16, intmax_t, SCNdMAX */
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
60
64
#include <assert.h> /* assert() */
61
#include <errno.h> /* perror(), errno */
62
#include <time.h> /* nanosleep(), time() */
65
#include <errno.h> /* perror(), errno,
66
program_invocation_short_name */
67
#include <time.h> /* nanosleep(), time(), sleep() */
63
68
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
64
69
SIOCSIFFLAGS, if_indextoname(),
65
70
if_nametoindex(), IF_NAMESIZE */
67
72
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
69
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
70
getuid(), getgid(), setuid(),
72
#include <arpa/inet.h> /* inet_pton(), htons */
75
getuid(), getgid(), seteuid(),
77
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
73
78
#include <iso646.h> /* not, or, and */
74
79
#include <argp.h> /* struct argp_option, error_t, struct
75
80
argp_state, struct argp,
76
81
argp_parse(), ARGP_KEY_ARG,
77
82
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
78
83
#include <signal.h> /* sigemptyset(), sigaddset(),
79
sigaction(), SIGTERM, sigaction,
84
sigaction(), SIGTERM, sig_atomic_t,
86
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
87
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
83
90
#include <sys/klog.h> /* klogctl() */
155
187
return buffer_capacity;
190
/* Add server to set of servers to retry periodically */
191
int add_server(const char *ip, uint16_t port,
192
AvahiIfIndex if_index,
195
server *new_server = malloc(sizeof(server));
196
if(new_server == NULL){
197
perror_plus("malloc");
200
*new_server = (server){ .ip = strdup(ip),
202
.if_index = if_index,
204
if(new_server->ip == NULL){
205
perror_plus("strdup");
208
/* Special case of first server */
209
if (mc.current_server == NULL){
210
new_server->next = new_server;
211
new_server->prev = new_server;
212
mc.current_server = new_server;
213
/* Place the new server last in the list */
215
new_server->next = mc.current_server;
216
new_server->prev = mc.current_server->prev;
217
new_server->prev->next = new_server;
218
mc.current_server->prev = new_server;
220
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
222
perror_plus("clock_gettime");
159
229
* Initialize GPGME.
161
231
static bool init_gpgme(const char *seckey,
162
232
const char *pubkey, const char *tempdir){
164
233
gpgme_error_t rc;
165
234
gpgme_engine_info_t engine_info;
306
376
gpgme_recipient_t recipient;
307
377
recipient = result->recipients;
309
while(recipient != NULL){
310
fprintf(stderr, "Public key algorithm: %s\n",
311
gpgme_pubkey_algo_name(recipient->pubkey_algo));
312
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
313
fprintf(stderr, "Secret key available: %s\n",
314
recipient->status == GPG_ERR_NO_SECKEY
316
recipient = recipient->next;
378
while(recipient != NULL){
379
fprintf(stderr, "Public key algorithm: %s\n",
380
gpgme_pubkey_algo_name(recipient->pubkey_algo));
381
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
382
fprintf(stderr, "Secret key available: %s\n",
383
recipient->status == GPG_ERR_NO_SECKEY
385
recipient = recipient->next;
877
sig_atomic_t quit_now = 0;
879
/* stop main loop after sigterm has been called */
880
static void handle_sigterm(__attribute__((unused)) int sig){
1073
/* Signal handler that stops main loop after SIGTERM */
1074
static void handle_sigterm(int sig){
1079
signal_received = sig;
885
1080
int old_errno = errno;
1081
/* set main loop to exit */
886
1082
if(mc.simple_poll != NULL){
887
1083
avahi_simple_poll_quit(mc.simple_poll);
889
1085
errno = old_errno;
1088
bool get_flags(const char *ifname, struct ifreq *ifr){
1091
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1093
perror_plus("socket");
1096
strcpy(ifr->ifr_name, ifname);
1097
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1100
perror_plus("ioctl SIOCGIFFLAGS");
1107
bool good_flags(const char *ifname, const struct ifreq *ifr){
1109
/* Reject the loopback device */
1110
if(ifr->ifr_flags & IFF_LOOPBACK){
1112
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1117
/* Accept point-to-point devices only if connect_to is specified */
1118
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1120
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1125
/* Otherwise, reject non-broadcast-capable devices */
1126
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1128
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1133
/* Reject non-ARP interfaces (including dummy interfaces) */
1134
if(ifr->ifr_flags & IFF_NOARP){
1136
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n", ifname);
1141
/* Accept this device */
1143
fprintf(stderr, "Interface \"%s\" is good\n", ifname);
1149
* This function determines if a directory entry in /sys/class/net
1150
* corresponds to an acceptable network device.
1151
* (This function is passed to scandir(3) as a filter function.)
1153
int good_interface(const struct dirent *if_entry){
1155
if(if_entry->d_name[0] == '.'){
1160
if(not get_flags(if_entry->d_name, &ifr)){
1164
if(not good_flags(if_entry->d_name, &ifr)){
1170
int notdotentries(const struct dirent *direntry){
1171
/* Skip "." and ".." */
1172
if(direntry->d_name[0] == '.'
1173
and (direntry->d_name[1] == '\0'
1174
or (direntry->d_name[1] == '.'
1175
and direntry->d_name[2] == '\0'))){
1181
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1183
struct timespec now;
1184
struct timespec waited_time;
1185
intmax_t block_time;
1188
if(mc.current_server == NULL){
1191
"Wait until first server is found. No timeout!\n");
1193
ret = avahi_simple_poll_iterate(s, -1);
1196
fprintf(stderr, "Check current_server if we should run it,"
1199
/* the current time */
1200
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1202
perror_plus("clock_gettime");
1205
/* Calculating in ms how long time between now and server
1206
who we visted longest time ago. Now - last seen. */
1207
waited_time.tv_sec = (now.tv_sec
1208
- mc.current_server->last_seen.tv_sec);
1209
waited_time.tv_nsec = (now.tv_nsec
1210
- mc.current_server->last_seen.tv_nsec);
1211
/* total time is 10s/10,000ms.
1212
Converting to s from ms by dividing by 1,000,
1213
and ns to ms by dividing by 1,000,000. */
1214
block_time = ((retry_interval
1215
- ((intmax_t)waited_time.tv_sec * 1000))
1216
- ((intmax_t)waited_time.tv_nsec / 1000000));
1219
fprintf(stderr, "Blocking for %" PRIdMAX " ms\n", block_time);
1222
if(block_time <= 0){
1223
ret = start_mandos_communication(mc.current_server->ip,
1224
mc.current_server->port,
1225
mc.current_server->if_index,
1226
mc.current_server->af);
1228
avahi_simple_poll_quit(mc.simple_poll);
1231
ret = clock_gettime(CLOCK_MONOTONIC,
1232
&mc.current_server->last_seen);
1234
perror_plus("clock_gettime");
1237
mc.current_server = mc.current_server->next;
1238
block_time = 0; /* Call avahi to find new Mandos
1239
servers, but don't block */
1242
ret = avahi_simple_poll_iterate(s, (int)block_time);
1245
if (ret > 0 or errno != EINTR) {
1246
return (ret != 1) ? ret : 0;
892
1252
int main(int argc, char *argv[]){
893
1253
AvahiSServiceBrowser *sb = NULL;
896
1256
intmax_t tmpmax;
898
1258
int exitcode = EXIT_SUCCESS;
899
const char *interface = "eth0";
1259
const char *interface = "";
900
1260
struct ifreq network;
1262
bool take_down_interface = false;
904
char *connect_to = NULL;
905
1265
char tempdir[] = "/tmp/mandosXXXXXX";
906
1266
bool tempdir_created = false;
907
1267
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
908
1268
const char *seckey = PATHDIR "/" SECKEY;
909
1269
const char *pubkey = PATHDIR "/" PUBKEY;
911
/* Initialize Mandos context */
912
mc = (mandos_context){ .simple_poll = NULL, .server = NULL,
913
.dh_bits = 1024, .priority = "SECURE256"
914
":!CTYPE-X.509:+CTYPE-OPENPGP" };
915
1271
bool gnutls_initialized = false;
916
1272
bool gpgme_initialized = false;
919
struct sigaction old_sigterm_action;
1274
double retry_interval = 10; /* 10s between trying a server and
1275
retrying the same server again */
1277
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
920
1278
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1283
/* Lower any group privileges we might have, just to be safe */
1287
perror_plus("setgid");
1290
/* Lower user privileges (temporarily) */
1294
perror_plus("seteuid");
923
1302
struct argp_option options[] = {
924
1303
{ .name = "debug", .key = 128,
987
1380
mc.priority = arg;
989
1382
case 131: /* --delay */
990
ret = sscanf(arg, "%lf%n", &delay, &numchars);
991
if(ret < 1 or arg[numchars] != '\0'){
992
fprintf(stderr, "Bad delay\n");
1384
delay = strtof(arg, &tmp);
1385
if(errno != 0 or tmp == arg or *tmp != '\0'){
1386
argp_error(state, "Bad delay");
1388
case 132: /* --retry */
1390
retry_interval = strtod(arg, &tmp);
1391
if(errno != 0 or tmp == arg or *tmp != '\0'
1392
or (retry_interval * 1000) > INT_MAX
1393
or retry_interval < 0){
1394
argp_error(state, "Bad retry interval");
1398
* These reproduce what we would get without ARGP_NO_HELP
1400
case '?': /* --help */
1401
argp_state_help(state, state->out_stream,
1402
(ARGP_HELP_STD_HELP | ARGP_HELP_EXIT_ERR)
1403
& ~(unsigned int)ARGP_HELP_EXIT_OK);
1404
case -3: /* --usage */
1405
argp_state_help(state, state->out_stream,
1406
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1407
case 'V': /* --version */
1408
fprintf(state->out_stream, "%s\n", argp_program_version);
1409
exit(argp_err_exit_status);
1001
1412
return ARGP_ERR_UNKNOWN;
1006
1417
struct argp argp = { .options = options, .parser = parse_opt,
1007
1418
.args_doc = "",
1008
1419
.doc = "Mandos client -- Get and decrypt"
1009
1420
" passwords from a Mandos server" };
1010
ret = argp_parse(&argp, argc, argv, 0, 0, NULL);
1011
if(ret == ARGP_ERR_UNKNOWN){
1012
fprintf(stderr, "Unknown error while parsing arguments\n");
1013
exitcode = EXIT_FAILURE;
1421
ret = argp_parse(&argp, argc, argv,
1422
ARGP_IN_ORDER | ARGP_NO_HELP, 0, NULL);
1429
perror_plus("argp_parse");
1430
exitcode = EX_OSERR;
1433
exitcode = EX_USAGE;
1439
/* Work around Debian bug #633582:
1440
<http://bugs.debian.org/633582> */
1443
/* Re-raise priviliges */
1447
perror_plus("seteuid");
1450
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1451
int seckey_fd = open(seckey, O_RDONLY);
1452
if(seckey_fd == -1){
1453
perror_plus("open");
1455
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1457
perror_plus("fstat");
1459
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1460
ret = fchown(seckey_fd, uid, gid);
1462
perror_plus("fchown");
1466
TEMP_FAILURE_RETRY(close(seckey_fd));
1470
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1471
int pubkey_fd = open(pubkey, O_RDONLY);
1472
if(pubkey_fd == -1){
1473
perror_plus("open");
1475
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1477
perror_plus("fstat");
1479
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1480
ret = fchown(pubkey_fd, uid, gid);
1482
perror_plus("fchown");
1486
TEMP_FAILURE_RETRY(close(pubkey_fd));
1490
/* Lower privileges */
1494
perror_plus("seteuid");
1019
1499
avahi_set_log_function(empty_log);
1502
if(interface[0] == '\0'){
1503
struct dirent **direntries;
1504
ret = scandir(sys_class_net, &direntries, good_interface,
1507
/* Pick the first good interface */
1508
interface = strdup(direntries[0]->d_name);
1510
fprintf(stderr, "Using interface \"%s\"\n", interface);
1512
if(interface == NULL){
1513
perror_plus("malloc");
1515
exitcode = EXIT_FAILURE;
1521
fprintf(stderr, "Could not find a network interface\n");
1522
exitcode = EXIT_FAILURE;
1022
1527
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1023
1528
from the signal handler */
1026
1531
mc.simple_poll = avahi_simple_poll_new();
1027
1532
if(mc.simple_poll == NULL){
1028
1533
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1029
exitcode = EXIT_FAILURE;
1534
exitcode = EX_UNAVAILABLE;
1033
1538
sigemptyset(&sigterm_action.sa_mask);
1034
1539
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1036
perror("sigaddset");
1037
exitcode = EXIT_FAILURE;
1541
perror_plus("sigaddset");
1542
exitcode = EX_OSERR;
1040
1545
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1042
perror("sigaddset");
1043
exitcode = EXIT_FAILURE;
1547
perror_plus("sigaddset");
1548
exitcode = EX_OSERR;
1046
1551
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1048
perror("sigaddset");
1049
exitcode = EXIT_FAILURE;
1052
ret = sigaction(SIGTERM, &sigterm_action, &old_sigterm_action);
1054
perror("sigaction");
1055
exitcode = EXIT_FAILURE;
1553
perror_plus("sigaddset");
1554
exitcode = EX_OSERR;
1557
/* Need to check if the handler is SIG_IGN before handling:
1558
| [[info:libc:Initial Signal Actions]] |
1559
| [[info:libc:Basic Signal Handling]] |
1561
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1563
perror_plus("sigaction");
1566
if(old_sigterm_action.sa_handler != SIG_IGN){
1567
ret = sigaction(SIGINT, &sigterm_action, NULL);
1569
perror_plus("sigaction");
1570
exitcode = EX_OSERR;
1574
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1576
perror_plus("sigaction");
1579
if(old_sigterm_action.sa_handler != SIG_IGN){
1580
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1582
perror_plus("sigaction");
1583
exitcode = EX_OSERR;
1587
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1589
perror_plus("sigaction");
1592
if(old_sigterm_action.sa_handler != SIG_IGN){
1593
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1595
perror_plus("sigaction");
1596
exitcode = EX_OSERR;
1059
1601
/* If the interface is down, bring it up */
1060
if(interface[0] != '\0'){
1602
if(strcmp(interface, "none") != 0){
1603
if_index = (AvahiIfIndex) if_nametoindex(interface);
1605
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1606
exitcode = EX_UNAVAILABLE;
1614
/* Re-raise priviliges */
1618
perror_plus("seteuid");
1061
1621
#ifdef __linux__
1062
1622
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1063
messages to mess up the prompt */
1623
messages about the network interface to mess up the prompt */
1064
1624
ret = klogctl(8, NULL, 5);
1065
1625
bool restore_loglevel = true;
1067
1627
restore_loglevel = false;
1628
perror_plus("klogctl");
1070
1630
#endif /* __linux__ */
1072
1632
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1075
exitcode = EXIT_FAILURE;
1634
perror_plus("socket");
1635
exitcode = EX_OSERR;
1076
1636
#ifdef __linux__
1077
1637
if(restore_loglevel){
1078
1638
ret = klogctl(7, NULL, 0);
1640
perror_plus("klogctl");
1083
1643
#endif /* __linux__ */
1644
/* Lower privileges */
1648
perror_plus("seteuid");
1086
1652
strcpy(network.ifr_name, interface);
1087
1653
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1089
perror("ioctl SIOCGIFFLAGS");
1655
perror_plus("ioctl SIOCGIFFLAGS");
1090
1656
#ifdef __linux__
1091
1657
if(restore_loglevel){
1092
1658
ret = klogctl(7, NULL, 0);
1660
perror_plus("klogctl");
1097
1663
#endif /* __linux__ */
1098
exitcode = EXIT_FAILURE;
1664
exitcode = EX_OSERR;
1665
/* Lower privileges */
1669
perror_plus("seteuid");
1101
1673
if((network.ifr_flags & IFF_UP) == 0){
1102
1674
network.ifr_flags |= IFF_UP;
1675
take_down_interface = true;
1103
1676
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1105
perror("ioctl SIOCSIFFLAGS");
1106
exitcode = EXIT_FAILURE;
1678
take_down_interface = false;
1679
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1680
exitcode = EX_OSERR;
1107
1681
#ifdef __linux__
1108
1682
if(restore_loglevel){
1109
1683
ret = klogctl(7, NULL, 0);
1685
perror_plus("klogctl");
1114
1688
#endif /* __linux__ */
1689
/* Lower privileges */
1693
perror_plus("seteuid");
1118
/* sleep checking until interface is running */
1698
/* Sleep checking until interface is running.
1699
Check every 0.25s, up to total time of delay */
1119
1700
for(int i=0; i < delay * 4; i++){
1120
1701
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1122
perror("ioctl SIOCGIFFLAGS");
1703
perror_plus("ioctl SIOCGIFFLAGS");
1123
1704
} else if(network.ifr_flags & IFF_RUNNING){
1126
1707
struct timespec sleeptime = { .tv_nsec = 250000000 };
1127
1708
ret = nanosleep(&sleeptime, NULL);
1128
1709
if(ret == -1 and errno != EINTR){
1129
perror("nanosleep");
1710
perror_plus("nanosleep");
1132
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1713
if(not take_down_interface){
1714
/* We won't need the socket anymore */
1715
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1717
perror_plus("close");
1136
1720
#ifdef __linux__
1137
1721
if(restore_loglevel){
1138
1722
/* Restores kernel loglevel to default */
1139
1723
ret = klogctl(7, NULL, 0);
1725
perror_plus("klogctl");
1144
1728
#endif /* __linux__ */
1729
/* Lower privileges */
1731
if(take_down_interface){
1732
/* Lower privileges */
1735
perror_plus("seteuid");
1738
/* Lower privileges permanently */
1741
perror_plus("setuid");
1161
1750
ret = init_gnutls_global(pubkey, seckey);
1163
1752
fprintf(stderr, "init_gnutls_global failed\n");
1164
exitcode = EXIT_FAILURE;
1753
exitcode = EX_UNAVAILABLE;
1167
1756
gnutls_initialized = true;
1170
1763
if(mkdtemp(tempdir) == NULL){
1764
perror_plus("mkdtemp");
1174
1767
tempdir_created = true;
1176
1773
if(not init_gpgme(pubkey, seckey, tempdir)){
1177
1774
fprintf(stderr, "init_gpgme failed\n");
1178
exitcode = EXIT_FAILURE;
1775
exitcode = EX_UNAVAILABLE;
1181
1778
gpgme_initialized = true;
1184
if(interface[0] != '\0'){
1185
if_index = (AvahiIfIndex) if_nametoindex(interface);
1187
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1188
exitcode = EXIT_FAILURE;
1193
1785
if(connect_to != NULL){
1196
1788
char *address = strrchr(connect_to, ':');
1197
1789
if(address == NULL){
1198
1790
fprintf(stderr, "No colon in address\n");
1199
exitcode = EXIT_FAILURE;
1791
exitcode = EX_USAGE;
1203
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1204
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1205
or address[numchars+1] != '\0'){
1801
tmpmax = strtoimax(address+1, &tmp, 10);
1802
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1803
or tmpmax != (uint16_t)tmpmax){
1206
1804
fprintf(stderr, "Bad port number\n");
1207
exitcode = EXIT_FAILURE;
1805
exitcode = EX_USAGE;
1210
1813
port = (uint16_t)tmpmax;
1211
1814
*address = '\0';
1212
address = connect_to;
1213
1815
/* Colon in address indicates IPv6 */
1215
if(strchr(address, ':') != NULL){
1817
if(strchr(connect_to, ':') != NULL){
1819
/* Accept [] around IPv6 address - see RFC 5952 */
1820
if(connect_to[0] == '[' and address[-1] == ']')
1220
ret = start_mandos_communication(address, port, if_index, af);
1222
exitcode = EXIT_FAILURE;
1828
address = connect_to;
1834
while(not quit_now){
1835
ret = start_mandos_communication(address, port, if_index, af);
1836
if(quit_now or ret == 0){
1840
fprintf(stderr, "Retrying in %d seconds\n",
1841
(int)retry_interval);
1843
sleep((int)retry_interval);
1224
1847
exitcode = EXIT_SUCCESS;
1230
1858
AvahiServerConfig config;
1231
1859
/* Do not publish any local Zeroconf records */
1296
1937
if(gpgme_initialized){
1297
1938
gpgme_release(mc.ctx);
1300
/* Removes the temp directory used by GPGME */
1941
/* Cleans up the circular linked list of Mandos servers the client
1943
if(mc.current_server != NULL){
1944
mc.current_server->prev->next = NULL;
1945
while(mc.current_server != NULL){
1946
server *next = mc.current_server->next;
1947
free(mc.current_server);
1948
mc.current_server = next;
1952
/* Take down the network interface */
1953
if(take_down_interface){
1954
/* Re-raise priviliges */
1958
perror_plus("seteuid");
1961
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1963
perror_plus("ioctl SIOCGIFFLAGS");
1964
} else if(network.ifr_flags & IFF_UP) {
1965
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1966
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1968
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1971
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1973
perror_plus("close");
1975
/* Lower privileges permanently */
1979
perror_plus("setuid");
1984
/* Removes the GPGME temp directory and all files inside */
1301
1985
if(tempdir_created){
1303
struct dirent *direntry;
1304
d = opendir(tempdir);
1306
if(errno != ENOENT){
1311
direntry = readdir(d);
1312
if(direntry == NULL){
1315
/* Skip "." and ".." */
1316
if(direntry->d_name[0] == '.'
1317
and (direntry->d_name[1] == '\0'
1318
or (direntry->d_name[1] == '.'
1319
and direntry->d_name[2] == '\0'))){
1986
struct dirent **direntries = NULL;
1987
struct dirent *direntry = NULL;
1988
int numentries = scandir(tempdir, &direntries, notdotentries,
1990
if (numentries > 0){
1991
for(int i = 0; i < numentries; i++){
1992
direntry = direntries[i];
1322
1993
char *fullname = NULL;
1323
1994
ret = asprintf(&fullname, "%s/%s", tempdir,
1324
1995
direntry->d_name);
1997
perror_plus("asprintf");
1329
2000
ret = remove(fullname);