32
32
/* Needed by GPGME, specifically gpgme_data_seek() */
33
#ifndef _LARGEFILE_SOURCE
34
33
#define _LARGEFILE_SOURCE
36
#ifndef _FILE_OFFSET_BITS
37
34
#define _FILE_OFFSET_BITS 64
40
36
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
42
38
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
stdout, ferror(), remove() */
39
stdout, ferror(), sscanf(),
44
41
#include <stdint.h> /* uint16_t, uint32_t */
45
42
#include <stddef.h> /* NULL, size_t, ssize_t */
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
43
#include <stdlib.h> /* free(), EXIT_SUCCESS, EXIT_FAILURE,
48
45
#include <stdbool.h> /* bool, false, true */
49
46
#include <string.h> /* memset(), strcmp(), strlen(),
50
47
strerror(), asprintf(), strcpy() */
59
56
#include <fcntl.h> /* open() */
60
57
#include <dirent.h> /* opendir(), struct dirent, readdir()
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
59
#include <inttypes.h> /* PRIu16, intmax_t, SCNdMAX */
64
60
#include <assert.h> /* assert() */
65
#include <errno.h> /* perror(), errno,
66
program_invocation_short_name */
67
#include <time.h> /* nanosleep(), time(), sleep() */
61
#include <errno.h> /* perror(), errno */
62
#include <time.h> /* nanosleep(), time() */
68
63
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
69
64
SIOCSIFFLAGS, if_indextoname(),
70
65
if_nametoindex(), IF_NAMESIZE */
72
67
INET_ADDRSTRLEN, INET6_ADDRSTRLEN
74
69
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
getuid(), getgid(), seteuid(),
77
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
70
getuid(), getgid(), setuid(),
72
#include <arpa/inet.h> /* inet_pton(), htons */
78
73
#include <iso646.h> /* not, or, and */
79
74
#include <argp.h> /* struct argp_option, error_t, struct
80
75
argp_state, struct argp,
81
76
argp_parse(), ARGP_KEY_ARG,
82
77
ARGP_KEY_END, ARGP_ERR_UNKNOWN */
83
78
#include <signal.h> /* sigemptyset(), sigaddset(),
84
sigaction(), SIGTERM, sig_atomic_t,
86
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
87
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
79
sigaction(), SIGTERM, sigaction,
90
83
#include <sys/klog.h> /* klogctl() */
187
155
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");
229
159
* Initialize GPGME.
231
161
static bool init_gpgme(const char *seckey,
232
162
const char *pubkey, const char *tempdir){
233
164
gpgme_error_t rc;
234
165
gpgme_engine_info_t engine_info;
1073
/* Signal handler that stops main loop after SIGTERM */
1074
static void handle_sigterm(int sig){
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){
1079
signal_received = sig;
1080
885
int old_errno = errno;
1081
/* set main loop to exit */
1082
886
if(mc.simple_poll != NULL){
1083
887
avahi_simple_poll_quit(mc.simple_poll);
1085
889
errno = old_errno;
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");
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;
1275
892
int main(int argc, char *argv[]){
1276
893
AvahiSServiceBrowser *sb = NULL;
1279
896
intmax_t tmpmax;
1281
898
int exitcode = EXIT_SUCCESS;
1282
const char *interface = "";
899
const char *interface = "eth0";
1283
900
struct ifreq network;
1285
bool take_down_interface = false;
904
char *connect_to = NULL;
1288
905
char tempdir[] = "/tmp/mandosXXXXXX";
1289
906
bool tempdir_created = false;
1290
907
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1291
908
const char *seckey = PATHDIR "/" SECKEY;
1292
909
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" };
1294
915
bool gnutls_initialized = false;
1295
916
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 };
919
struct sigaction old_sigterm_action;
1301
920
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
923
struct argp_option options[] = {
1326
924
{ .name = "debug", .key = 128,
1403
987
mc.priority = arg;
1405
989
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");
990
ret = sscanf(arg, "%lf%n", &delay, &numchars);
991
if(ret < 1 or arg[numchars] != '\0'){
992
fprintf(stderr, "Bad delay\n");
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
1001
return ARGP_ERR_UNKNOWN;
1440
1006
struct argp argp = { .options = options, .parser = parse_opt,
1441
1007
.args_doc = "",
1442
1008
.doc = "Mandos client -- Get and decrypt"
1443
1009
" 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");
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;
1518
1019
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
1022
/* Initialize Avahi early so avahi_simple_poll_quit() can be called
1547
1023
from the signal handler */
1550
1026
mc.simple_poll = avahi_simple_poll_new();
1551
1027
if(mc.simple_poll == NULL){
1552
1028
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1553
exitcode = EX_UNAVAILABLE;
1029
exitcode = EXIT_FAILURE;
1557
1033
sigemptyset(&sigterm_action.sa_mask);
1558
1034
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1560
perror_plus("sigaddset");
1561
exitcode = EX_OSERR;
1036
perror("sigaddset");
1037
exitcode = EXIT_FAILURE;
1564
1040
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1566
perror_plus("sigaddset");
1567
exitcode = EX_OSERR;
1042
perror("sigaddset");
1043
exitcode = EXIT_FAILURE;
1570
1046
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;
1048
perror("sigaddset");
1049
exitcode = EXIT_FAILURE;
1052
ret = sigaction(SIGTERM, &sigterm_action, &old_sigterm_action);
1054
perror("sigaction");
1055
exitcode = EXIT_FAILURE;
1620
1059
/* If the interface is down, bring it up */
1621
if(strcmp(interface, "none") != 0){
1622
if_index = (AvahiIfIndex) if_nametoindex(interface);
1624
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1625
exitcode = EX_UNAVAILABLE;
1633
/* Re-raise priviliges */
1637
perror_plus("seteuid");
1060
if(interface[0] != '\0'){
1640
1061
#ifdef __linux__
1641
1062
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1642
messages about the network interface to mess up the prompt */
1063
messages to mess up the prompt */
1643
1064
ret = klogctl(8, NULL, 5);
1644
1065
bool restore_loglevel = true;
1646
1067
restore_loglevel = false;
1647
perror_plus("klogctl");
1649
1070
#endif /* __linux__ */
1651
1072
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1653
perror_plus("socket");
1654
exitcode = EX_OSERR;
1075
exitcode = EXIT_FAILURE;
1655
1076
#ifdef __linux__
1656
1077
if(restore_loglevel){
1657
1078
ret = klogctl(7, NULL, 0);
1659
perror_plus("klogctl");
1662
1083
#endif /* __linux__ */
1663
/* Lower privileges */
1667
perror_plus("seteuid");
1671
1086
strcpy(network.ifr_name, interface);
1672
1087
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1674
perror_plus("ioctl SIOCGIFFLAGS");
1089
perror("ioctl SIOCGIFFLAGS");
1675
1090
#ifdef __linux__
1676
1091
if(restore_loglevel){
1677
1092
ret = klogctl(7, NULL, 0);
1679
perror_plus("klogctl");
1682
1097
#endif /* __linux__ */
1683
exitcode = EX_OSERR;
1684
/* Lower privileges */
1688
perror_plus("seteuid");
1098
exitcode = EXIT_FAILURE;
1692
1101
if((network.ifr_flags & IFF_UP) == 0){
1693
1102
network.ifr_flags |= IFF_UP;
1694
take_down_interface = true;
1695
1103
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1697
take_down_interface = false;
1698
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1699
exitcode = EX_OSERR;
1105
perror("ioctl SIOCSIFFLAGS");
1106
exitcode = EXIT_FAILURE;
1700
1107
#ifdef __linux__
1701
1108
if(restore_loglevel){
1702
1109
ret = klogctl(7, NULL, 0);
1704
perror_plus("klogctl");
1707
1114
#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 */
1118
/* sleep checking until interface is running */
1719
1119
for(int i=0; i < delay * 4; i++){
1720
1120
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1722
perror_plus("ioctl SIOCGIFFLAGS");
1122
perror("ioctl SIOCGIFFLAGS");
1723
1123
} else if(network.ifr_flags & IFF_RUNNING){
1726
1126
struct timespec sleeptime = { .tv_nsec = 250000000 };
1727
1127
ret = nanosleep(&sleeptime, NULL);
1728
1128
if(ret == -1 and errno != EINTR){
1729
perror_plus("nanosleep");
1129
perror("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");
1132
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1739
1136
#ifdef __linux__
1740
1137
if(restore_loglevel){
1741
1138
/* Restores kernel loglevel to default */
1742
1139
ret = klogctl(7, NULL, 0);
1744
perror_plus("klogctl");
1747
1144
#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
1161
ret = init_gnutls_global(pubkey, seckey);
1771
1163
fprintf(stderr, "init_gnutls_global failed\n");
1772
exitcode = EX_UNAVAILABLE;
1164
exitcode = EXIT_FAILURE;
1775
1167
gnutls_initialized = true;
1782
1170
if(mkdtemp(tempdir) == NULL){
1783
perror_plus("mkdtemp");
1786
1174
tempdir_created = true;
1792
1176
if(not init_gpgme(pubkey, seckey, tempdir)){
1793
1177
fprintf(stderr, "init_gpgme failed\n");
1794
exitcode = EX_UNAVAILABLE;
1178
exitcode = EXIT_FAILURE;
1797
1181
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;
1804
1193
if(connect_to != NULL){
1807
1196
char *address = strrchr(connect_to, ':');
1808
1197
if(address == NULL){
1809
1198
fprintf(stderr, "No colon in address\n");
1810
exitcode = EX_USAGE;
1199
exitcode = EXIT_FAILURE;
1820
tmpmax = strtoimax(address+1, &tmp, 10);
1821
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1822
or tmpmax != (uint16_t)tmpmax){
1203
ret = sscanf(address+1, "%" SCNdMAX "%n", &tmpmax, &numchars);
1204
if(ret < 1 or tmpmax != (uint16_t)tmpmax
1205
or address[numchars+1] != '\0'){
1823
1206
fprintf(stderr, "Bad port number\n");
1824
exitcode = EX_USAGE;
1207
exitcode = EXIT_FAILURE;
1832
1210
port = (uint16_t)tmpmax;
1833
1211
*address = '\0';
1212
address = connect_to;
1834
1213
/* Colon in address indicates IPv6 */
1836
if(strchr(connect_to, ':') != NULL){
1215
if(strchr(address, ':') != 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);
1220
ret = start_mandos_communication(address, port, if_index, af);
1222
exitcode = EXIT_FAILURE;
1866
1224
exitcode = EXIT_SUCCESS;
1877
1230
AvahiServerConfig config;
1878
1231
/* Do not publish any local Zeroconf records */
1956
1296
if(gpgme_initialized){
1957
1297
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 */
1300
/* Removes the temp directory used by GPGME */
2004
1301
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];
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'))){
2011
1322
char *fullname = NULL;
2012
1323
ret = asprintf(&fullname, "%s/%s", tempdir,
2013
1324
direntry->d_name);
2015
perror_plus("asprintf");
2018
1329
ret = remove(fullname);