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- Committer: Teddy Hogeborn
- Date: 2011-07-13 02:24:39 UTC
- mfrom: (24.1.174 mandos)
- Revision ID: teddy@fukt.bsnet.se-20110713022439-wbv6kghshdsc2x24
Merge from Björn.
added
removed
plugins.d/mandos-client.c
62
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
63
63
strtoimax() */
64
64
#include <assert.h> /* assert() */
65
#include <errno.h> /* perror(), errno */
65
#include <errno.h> /* perror(), errno,
66
program_invocation_short_name */
66
67
#include <time.h> /* nanosleep(), time(), sleep() */
67
68
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
68
69
SIOCSIFFLAGS, if_indextoname(),
73
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
75
getuid(), getgid(), seteuid(),
75
76
setgid(), pause() */
76
#include <arpa/inet.h> /* inet_pton(), htons */
77
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
77
78
#include <iso646.h> /* not, or, and */
78
79
#include <argp.h> /* struct argp_option, error_t, struct
79
80
argp_state, struct argp,
130
131
static const char sys_class_net[] = "/sys/class/net";
131
132
char *connect_to = NULL;
132
133
134
/* Doubly linked list that need to be circularly linked when used */
135
typedef struct server{
136
const char *ip;
137
uint16_t port;
138
AvahiIfIndex if_index;
139
int af;
140
struct timespec last_seen;
141
struct server *next;
142
struct server *prev;
143
} server;
144
133
145
/* Used for passing in values through the Avahi callback functions */
134
146
typedef struct {
135
147
AvahiSimplePoll *simple_poll;
139
151
gnutls_dh_params_t dh_params;
140
152
const char *priority;
141
153
gpgme_ctx_t ctx;
154
server *current_server;
142
155
} mandos_context;
143
156
144
157
/* global context so signal handler can reach it*/
145
158
mandos_context mc = { .simple_poll = NULL, .server = NULL,
146
159
.dh_bits = 1024, .priority = "SECURE256"
147
":!CTYPE-X.509:+CTYPE-OPENPGP" };
160
":!CTYPE-X.509:+CTYPE-OPENPGP",
161
.current_server = NULL };
148
162
149
163
sig_atomic_t quit_now = 0;
150
164
int signal_received = 0;
151
165
166
/* Function to use when printing errors */
167
void perror_plus(const char *print_text){
168
fprintf(stderr, "Mandos plugin %s: ",
169
program_invocation_short_name);
170
perror(print_text);
171
}
172
152
173
/*
153
174
* Make additional room in "buffer" for at least BUFFER_SIZE more
154
175
* bytes. "buffer_capacity" is how much is currently allocated,
166
187
return buffer_capacity;
167
188
}
168
189
190
int add_server(const char *ip, uint16_t port,
191
AvahiIfIndex if_index,
192
int af){
193
int ret;
194
server *new_server = malloc(sizeof(server));
195
if(new_server == NULL){
196
perror_plus("malloc");
197
return -1;
198
}
199
*new_server = (server){ .ip = strdup(ip),
200
.port = port,
201
.if_index = if_index,
202
.af = af };
203
if(new_server->ip == NULL){
204
perror_plus("strdup");
205
return -1;
206
}
207
/* unique case of first server */
208
if (mc.current_server == NULL){
209
new_server->next = new_server;
210
new_server->prev = new_server;
211
mc.current_server = new_server;
212
/* Placing the new server last in the list */
213
} else {
214
new_server->next = mc.current_server;
215
new_server->prev = mc.current_server->prev;
216
new_server->prev->next = new_server;
217
mc.current_server->prev = new_server;
218
}
219
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
220
if(ret == -1){
221
perror_plus("clock_gettime");
222
return -1;
223
}
224
return 0;
225
}
226
169
227
/*
170
228
* Initialize GPGME.
171
229
*/
185
243
186
244
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
187
245
if(fd == -1){
188
perror("open");
246
perror_plus("open");
189
247
return false;
190
248
}
191
249
205
263
206
264
ret = (int)TEMP_FAILURE_RETRY(close(fd));
207
265
if(ret == -1){
208
perror("close");
266
perror_plus("close");
209
267
}
210
268
gpgme_data_release(pgp_data);
211
269
return true;
336
394
337
395
/* Seek back to the beginning of the GPGME plaintext data buffer */
338
396
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
339
perror("gpgme_data_seek");
397
perror_plus("gpgme_data_seek");
340
398
plaintext_length = -1;
341
399
goto decrypt_end;
342
400
}
347
405
(size_t)plaintext_length,
348
406
plaintext_capacity);
349
407
if(plaintext_capacity == 0){
350
perror("incbuffer");
408
perror_plus("incbuffer");
351
409
plaintext_length = -1;
352
410
goto decrypt_end;
353
411
}
360
418
break;
361
419
}
362
420
if(ret < 0){
363
perror("gpgme_data_read");
421
perror_plus("gpgme_data_read");
364
422
plaintext_length = -1;
365
423
goto decrypt_end;
366
424
}
423
481
}
424
482
425
483
/* OpenPGP credentials */
426
gnutls_certificate_allocate_credentials(&mc.cred);
484
ret = gnutls_certificate_allocate_credentials(&mc.cred);
427
485
if(ret != GNUTLS_E_SUCCESS){
428
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
429
from
430
-Wunreachable-code
431
*/
486
fprintf(stderr, "GnuTLS memory error: %s\n",
432
487
safer_gnutls_strerror(ret));
433
488
gnutls_global_deinit();
434
489
return -1;
589
644
tcp_sd = socket(pf, SOCK_STREAM, 0);
590
645
if(tcp_sd < 0){
591
646
int e = errno;
592
perror("socket");
647
perror_plus("socket");
593
648
errno = e;
594
649
goto mandos_end;
595
650
}
609
664
}
610
665
if(ret < 0 ){
611
666
int e = errno;
612
perror("inet_pton");
667
perror_plus("inet_pton");
613
668
errno = e;
614
669
goto mandos_end;
615
670
}
651
706
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
652
707
char interface[IF_NAMESIZE];
653
708
if(if_indextoname((unsigned int)if_index, interface) == NULL){
654
perror("if_indextoname");
709
perror_plus("if_indextoname");
655
710
} else {
656
711
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
657
712
ip, interface, port);
671
726
sizeof(addrstr));
672
727
}
673
728
if(pcret == NULL){
674
perror("inet_ntop");
729
perror_plus("inet_ntop");
675
730
} else {
676
731
if(strcmp(addrstr, ip) != 0){
677
732
fprintf(stderr, "Canonical address form: %s\n", addrstr);
692
747
if(ret < 0){
693
748
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
694
749
int e = errno;
695
perror("connect");
750
perror_plus("connect");
696
751
errno = e;
697
752
}
698
753
goto mandos_end;
711
766
out_size - written));
712
767
if(ret == -1){
713
768
int e = errno;
714
perror("write");
769
perror_plus("write");
715
770
errno = e;
716
771
goto mandos_end;
717
772
}
742
797
goto mandos_end;
743
798
}
744
799
800
/* Spurious warning from -Wint-to-pointer-cast */
745
801
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
746
802
747
803
if(quit_now){
784
840
buffer_capacity);
785
841
if(buffer_capacity == 0){
786
842
int e = errno;
787
perror("incbuffer");
843
perror_plus("incbuffer");
788
844
errno = e;
789
845
goto mandos_end;
790
846
}
895
951
if(e == 0){
896
952
e = errno;
897
953
}
898
perror("close");
954
perror_plus("close");
899
955
}
900
956
gnutls_deinit(session);
957
errno = e;
901
958
if(quit_now){
902
e = EINTR;
959
errno = EINTR;
903
960
retval = -1;
904
961
}
905
errno = e;
906
962
}
907
963
return retval;
908
964
}
951
1007
avahi_proto_to_af(proto));
952
1008
if(ret == 0){
953
1009
avahi_simple_poll_quit(mc.simple_poll);
1010
} else {
1011
ret = add_server(ip, port, interface,
1012
avahi_proto_to_af(proto));
954
1013
}
955
1014
}
956
1015
}
1010
1069
}
1011
1070
}
1012
1071
1013
/* stop main loop after sigterm has been called */
1072
/* Signal handler that stops main loop after SIGTERM */
1014
1073
static void handle_sigterm(int sig){
1015
1074
if(quit_now){
1016
1075
return;
1018
1077
quit_now = 1;
1019
1078
signal_received = sig;
1020
1079
int old_errno = errno;
1080
/* set main loop to exit */
1021
1081
if(mc.simple_poll != NULL){
1022
1082
avahi_simple_poll_quit(mc.simple_poll);
1023
1083
}
1038
1098
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1039
1099
if_entry->d_name);
1040
1100
if(ret < 0){
1041
perror("asprintf");
1101
perror_plus("asprintf");
1042
1102
return 0;
1043
1103
}
1044
1104
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1045
1105
if(flags_fd == -1){
1046
perror("open");
1106
perror_plus("open");
1047
1107
free(flagname);
1048
1108
return 0;
1049
1109
}
1050
1110
free(flagname);
1051
1111
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1052
1112
/* read line from flags_fd */
1053
ssize_t to_read = (sizeof(ifreq_flags)*2)+3; /* "0x1003\n" */
1113
ssize_t to_read = 2+(sizeof(ifreq_flags)*2)+1; /* "0x1003\n" */
1054
1114
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1055
1115
flagstring[(size_t)to_read] = '\0';
1056
1116
if(flagstring == NULL){
1057
perror("malloc");
1117
perror_plus("malloc");
1058
1118
close(flags_fd);
1059
1119
return 0;
1060
1120
}
1062
1122
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1063
1123
(size_t)to_read));
1064
1124
if(ssret == -1){
1065
perror("read");
1125
perror_plus("read");
1066
1126
free(flagstring);
1067
1127
close(flags_fd);
1068
1128
return 0;
1113
1173
}
1114
1174
return 0;
1115
1175
}
1176
/* Reject non-ARP interfaces (including dummy interfaces) */
1177
if(flags & IFF_NOARP){
1178
if(debug){
1179
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n",
1180
if_entry->d_name);
1181
}
1182
return 0;
1183
}
1116
1184
/* Accept this device */
1117
1185
if(debug){
1118
1186
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1121
1189
return 1;
1122
1190
}
1123
1191
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'))){
1198
return 0;
1199
}
1200
return 1;
1201
}
1202
1203
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1204
int ret;
1205
struct timespec now;
1206
struct timespec waited_time;
1207
intmax_t block_time;
1208
1209
while(true){
1210
if(mc.current_server == NULL){
1211
if (debug){
1212
fprintf(stderr,
1213
"Wait until first server is found. No timeout!\n");
1214
}
1215
ret = avahi_simple_poll_iterate(s, -1);
1216
} else {
1217
if (debug){
1218
fprintf(stderr, "Check current_server if we should run it,"
1219
" or wait\n");
1220
}
1221
/* the current time */
1222
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1223
if(ret == -1){
1224
perror_plus("clock_gettime");
1225
return -1;
1226
}
1227
/* Calculating in ms how long time between now and server
1228
who we visted longest time ago. Now - last seen. */
1229
waited_time.tv_sec = (now.tv_sec
1230
- mc.current_server->last_seen.tv_sec);
1231
waited_time.tv_nsec = (now.tv_nsec
1232
- mc.current_server->last_seen.tv_nsec);
1233
/* total time is 10s/10,000ms.
1234
Converting to s from ms by dividing by 1,000,
1235
and ns to ms by dividing by 1,000,000. */
1236
block_time = ((retry_interval
1237
- ((intmax_t)waited_time.tv_sec * 1000))
1238
- ((intmax_t)waited_time.tv_nsec / 1000000));
1239
1240
if (debug){
1241
fprintf(stderr, "Blocking for %ld ms\n", block_time);
1242
}
1243
1244
if(block_time <= 0){
1245
ret = start_mandos_communication(mc.current_server->ip,
1246
mc.current_server->port,
1247
mc.current_server->if_index,
1248
mc.current_server->af);
1249
if(ret == 0){
1250
avahi_simple_poll_quit(mc.simple_poll);
1251
return 0;
1252
}
1253
ret = clock_gettime(CLOCK_MONOTONIC,
1254
&mc.current_server->last_seen);
1255
if(ret == -1){
1256
perror_plus("clock_gettime");
1257
return -1;
1258
}
1259
mc.current_server = mc.current_server->next;
1260
block_time = 0; /* Call avahi to find new Mandos
1261
servers, but don't block */
1262
}
1263
1264
ret = avahi_simple_poll_iterate(s, (int)block_time);
1265
}
1266
if(ret != 0){
1267
if (ret > 0 or errno != EINTR) {
1268
return (ret != 1) ? ret : 0;
1269
}
1270
}
1271
}
1272
}
1273
1124
1274
int main(int argc, char *argv[]){
1125
1275
AvahiSServiceBrowser *sb = NULL;
1126
1276
int error;
1143
1293
bool gnutls_initialized = false;
1144
1294
bool gpgme_initialized = false;
1145
1295
float delay = 2.5f;
1296
double retry_interval = 10; /* 10s between trying a server and
1297
retrying the same server again */
1146
1298
1147
1299
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1148
1300
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1154
1306
errno = 0;
1155
1307
ret = setgid(gid);
1156
1308
if(ret == -1){
1157
perror("setgid");
1309
perror_plus("setgid");
1158
1310
}
1159
1311
1160
1312
/* Lower user privileges (temporarily) */
1161
1313
errno = 0;
1162
1314
ret = seteuid(uid);
1163
1315
if(ret == -1){
1164
perror("seteuid");
1316
perror_plus("seteuid");
1165
1317
}
1166
1318
1167
1319
if(quit_now){
1202
1354
.arg = "SECONDS",
1203
1355
.doc = "Maximum delay to wait for interface startup",
1204
1356
.group = 2 },
1357
{ .name = "retry", .key = 132,
1358
.arg = "SECONDS",
1359
.doc = "Retry interval used when denied by the mandos server",
1360
.group = 2 },
1205
1361
/*
1206
1362
* These reproduce what we would get without ARGP_NO_HELP
1207
1363
*/
1251
1407
if(errno != 0 or tmp == arg or *tmp != '\0'){
1252
1408
argp_error(state, "Bad delay");
1253
1409
}
1410
case 132: /* --retry */
1411
errno = 0;
1412
retry_interval = strtod(arg, &tmp);
1413
if(errno != 0 or tmp == arg or *tmp != '\0'
1414
or (retry_interval * 1000) > INT_MAX){
1415
argp_error(state, "Bad retry interval");
1416
}
1254
1417
break;
1255
1418
/*
1256
1419
* These reproduce what we would get without ARGP_NO_HELP
1284
1447
case ENOMEM:
1285
1448
default:
1286
1449
errno = ret;
1287
perror("argp_parse");
1450
perror_plus("argp_parse");
1288
1451
exitcode = EX_OSERR;
1289
1452
goto end;
1290
1453
case EINVAL:
1308
1471
fprintf(stderr, "Using interface \"%s\"\n", interface);
1309
1472
}
1310
1473
if(interface == NULL){
1311
perror("malloc");
1474
perror_plus("malloc");
1312
1475
free(direntries);
1313
1476
exitcode = EXIT_FAILURE;
1314
1477
goto end;
1336
1499
sigemptyset(&sigterm_action.sa_mask);
1337
1500
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1338
1501
if(ret == -1){
1339
perror("sigaddset");
1502
perror_plus("sigaddset");
1340
1503
exitcode = EX_OSERR;
1341
1504
goto end;
1342
1505
}
1343
1506
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1344
1507
if(ret == -1){
1345
perror("sigaddset");
1508
perror_plus("sigaddset");
1346
1509
exitcode = EX_OSERR;
1347
1510
goto end;
1348
1511
}
1349
1512
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1350
1513
if(ret == -1){
1351
perror("sigaddset");
1514
perror_plus("sigaddset");
1352
1515
exitcode = EX_OSERR;
1353
1516
goto end;
1354
1517
}
1358
1521
*/
1359
1522
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1360
1523
if(ret == -1){
1361
perror("sigaction");
1524
perror_plus("sigaction");
1362
1525
return EX_OSERR;
1363
1526
}
1364
1527
if(old_sigterm_action.sa_handler != SIG_IGN){
1365
1528
ret = sigaction(SIGINT, &sigterm_action, NULL);
1366
1529
if(ret == -1){
1367
perror("sigaction");
1530
perror_plus("sigaction");
1368
1531
exitcode = EX_OSERR;
1369
1532
goto end;
1370
1533
}
1371
1534
}
1372
1535
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1373
1536
if(ret == -1){
1374
perror("sigaction");
1537
perror_plus("sigaction");
1375
1538
return EX_OSERR;
1376
1539
}
1377
1540
if(old_sigterm_action.sa_handler != SIG_IGN){
1378
1541
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1379
1542
if(ret == -1){
1380
perror("sigaction");
1543
perror_plus("sigaction");
1381
1544
exitcode = EX_OSERR;
1382
1545
goto end;
1383
1546
}
1384
1547
}
1385
1548
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1386
1549
if(ret == -1){
1387
perror("sigaction");
1550
perror_plus("sigaction");
1388
1551
return EX_OSERR;
1389
1552
}
1390
1553
if(old_sigterm_action.sa_handler != SIG_IGN){
1391
1554
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1392
1555
if(ret == -1){
1393
perror("sigaction");
1556
perror_plus("sigaction");
1394
1557
exitcode = EX_OSERR;
1395
1558
goto end;
1396
1559
}
1413
1576
errno = 0;
1414
1577
ret = seteuid(0);
1415
1578
if(ret == -1){
1416
perror("seteuid");
1579
perror_plus("seteuid");
1417
1580
}
1418
1581
1419
1582
#ifdef __linux__
1423
1586
bool restore_loglevel = true;
1424
1587
if(ret == -1){
1425
1588
restore_loglevel = false;
1426
perror("klogctl");
1589
perror_plus("klogctl");
1427
1590
}
1428
1591
#endif /* __linux__ */
1429
1592
1430
1593
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1431
1594
if(sd < 0){
1432
perror("socket");
1595
perror_plus("socket");
1433
1596
exitcode = EX_OSERR;
1434
1597
#ifdef __linux__
1435
1598
if(restore_loglevel){
1436
1599
ret = klogctl(7, NULL, 0);
1437
1600
if(ret == -1){
1438
perror("klogctl");
1601
perror_plus("klogctl");
1439
1602
}
1440
1603
}
1441
1604
#endif /* __linux__ */
1443
1606
errno = 0;
1444
1607
ret = seteuid(uid);
1445
1608
if(ret == -1){
1446
perror("seteuid");
1609
perror_plus("seteuid");
1447
1610
}
1448
1611
goto end;
1449
1612
}
1450
1613
strcpy(network.ifr_name, interface);
1451
1614
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1452
1615
if(ret == -1){
1453
perror("ioctl SIOCGIFFLAGS");
1616
perror_plus("ioctl SIOCGIFFLAGS");
1454
1617
#ifdef __linux__
1455
1618
if(restore_loglevel){
1456
1619
ret = klogctl(7, NULL, 0);
1457
1620
if(ret == -1){
1458
perror("klogctl");
1621
perror_plus("klogctl");
1459
1622
}
1460
1623
}
1461
1624
#endif /* __linux__ */
1464
1627
errno = 0;
1465
1628
ret = seteuid(uid);
1466
1629
if(ret == -1){
1467
perror("seteuid");
1630
perror_plus("seteuid");
1468
1631
}
1469
1632
goto end;
1470
1633
}
1474
1637
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1475
1638
if(ret == -1){
1476
1639
take_down_interface = false;
1477
perror("ioctl SIOCSIFFLAGS +IFF_UP");
1640
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1478
1641
exitcode = EX_OSERR;
1479
1642
#ifdef __linux__
1480
1643
if(restore_loglevel){
1481
1644
ret = klogctl(7, NULL, 0);
1482
1645
if(ret == -1){
1483
perror("klogctl");
1646
perror_plus("klogctl");
1484
1647
}
1485
1648
}
1486
1649
#endif /* __linux__ */
1488
1651
errno = 0;
1489
1652
ret = seteuid(uid);
1490
1653
if(ret == -1){
1491
perror("seteuid");
1654
perror_plus("seteuid");
1492
1655
}
1493
1656
goto end;
1494
1657
}
1495
1658
}
1496
/* sleep checking until interface is running */
1659
/* Sleep checking until interface is running.
1660
Check every 0.25s, up to total time of delay */
1497
1661
for(int i=0; i < delay * 4; i++){
1498
1662
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1499
1663
if(ret == -1){
1500
perror("ioctl SIOCGIFFLAGS");
1664
perror_plus("ioctl SIOCGIFFLAGS");
1501
1665
} else if(network.ifr_flags & IFF_RUNNING){
1502
1666
break;
1503
1667
}
1504
1668
struct timespec sleeptime = { .tv_nsec = 250000000 };
1505
1669
ret = nanosleep(&sleeptime, NULL);
1506
1670
if(ret == -1 and errno != EINTR){
1507
perror("nanosleep");
1671
perror_plus("nanosleep");
1508
1672
}
1509
1673
}
1510
1674
if(not take_down_interface){
1511
1675
/* We won't need the socket anymore */
1512
1676
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1513
1677
if(ret == -1){
1514
perror("close");
1678
perror_plus("close");
1515
1679
}
1516
1680
}
1517
1681
#ifdef __linux__
1519
1683
/* Restores kernel loglevel to default */
1520
1684
ret = klogctl(7, NULL, 0);
1521
1685
if(ret == -1){
1522
perror("klogctl");
1686
perror_plus("klogctl");
1523
1687
}
1524
1688
}
1525
1689
#endif /* __linux__ */
1529
1693
/* Lower privileges */
1530
1694
ret = seteuid(uid);
1531
1695
if(ret == -1){
1532
perror("seteuid");
1696
perror_plus("seteuid");
1533
1697
}
1534
1698
} else {
1535
1699
/* Lower privileges permanently */
1536
1700
ret = setuid(uid);
1537
1701
if(ret == -1){
1538
perror("setuid");
1702
perror_plus("setuid");
1539
1703
}
1540
1704
}
1541
1705
}
1557
1721
goto end;
1558
1722
}
1559
1723
1724
if(mkdtemp(tempdir) == NULL){
1725
perror_plus("mkdtemp");
1726
goto end;
1727
}
1560
1728
tempdir_created = true;
1561
if(mkdtemp(tempdir) == NULL){
1562
tempdir_created = false;
1563
perror("mkdtemp");
1564
goto end;
1565
}
1566
1729
1567
1730
if(quit_now){
1568
1731
goto end;
1628
1791
if(quit_now or ret == 0){
1629
1792
break;
1630
1793
}
1631
sleep(15);
1794
sleep((int)retry_interval or 1);
1632
1795
};
1633
1796
1634
1797
if (not quit_now){
1692
1855
if(debug){
1693
1856
fprintf(stderr, "Starting Avahi loop search\n");
1694
1857
}
1695
1696
avahi_simple_poll_loop(mc.simple_poll);
1858
1859
ret = avahi_loop_with_timeout(mc.simple_poll,
1860
(int)(retry_interval * 1000));
1861
if(debug){
1862
fprintf(stderr, "avahi_loop_with_timeout exited %s\n",
1863
(ret == 0) ? "successfully" : "with error");
1864
}
1697
1865
1698
1866
end:
1699
1867
1720
1888
if(gpgme_initialized){
1721
1889
gpgme_release(mc.ctx);
1722
1890
}
1891
1892
/* Cleans up the circular linked list of Mandos servers the client
1893
has seen */
1894
if(mc.current_server != NULL){
1895
mc.current_server->prev->next = NULL;
1896
while(mc.current_server != NULL){
1897
server *next = mc.current_server->next;
1898
free(mc.current_server);
1899
mc.current_server = next;
1900
}
1901
}
1723
1902
1724
1903
/* Take down the network interface */
1725
1904
if(take_down_interface){
1727
1906
errno = 0;
1728
1907
ret = seteuid(0);
1729
1908
if(ret == -1){
1730
perror("seteuid");
1909
perror_plus("seteuid");
1731
1910
}
1732
1911
if(geteuid() == 0){
1733
1912
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1734
1913
if(ret == -1){
1735
perror("ioctl SIOCGIFFLAGS");
1914
perror_plus("ioctl SIOCGIFFLAGS");
1736
1915
} else if(network.ifr_flags & IFF_UP) {
1737
1916
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1738
1917
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1739
1918
if(ret == -1){
1740
perror("ioctl SIOCSIFFLAGS -IFF_UP");
1919
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1741
1920
}
1742
1921
}
1743
1922
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1744
1923
if(ret == -1){
1745
perror("close");
1924
perror_plus("close");
1746
1925
}
1747
1926
/* Lower privileges permanently */
1748
1927
errno = 0;
1749
1928
ret = setuid(uid);
1750
1929
if(ret == -1){
1751
perror("setuid");
1930
perror_plus("setuid");
1752
1931
}
1753
1932
}
1754
1933
}
1755
1934
1756
/* Removes the temp directory used by GPGME */
1935
/* Removes the GPGME temp directory and all files inside */
1757
1936
if(tempdir_created){
1758
DIR *d;
1759
struct dirent *direntry;
1760
d = opendir(tempdir);
1761
if(d == NULL){
1762
if(errno != ENOENT){
1763
perror("opendir");
1764
}
1765
} else {
1766
while(true){
1767
direntry = readdir(d);
1768
if(direntry == NULL){
1769
break;
1770
}
1771
/* Skip "." and ".." */
1772
if(direntry->d_name[0] == '.'
1773
and (direntry->d_name[1] == '\0'
1774
or (direntry->d_name[1] == '.'
1775
and direntry->d_name[2] == '\0'))){
1776
continue;
1777
}
1937
struct dirent **direntries = NULL;
1938
struct dirent *direntry = NULL;
1939
ret = scandir(tempdir, &direntries, notdotentries, alphasort);
1940
if (ret > 0){
1941
for(int i = 0; i < ret; i++){
1942
direntry = direntries[i];
1778
1943
char *fullname = NULL;
1779
1944
ret = asprintf(&fullname, "%s/%s", tempdir,
1780
1945
direntry->d_name);
1781
1946
if(ret < 0){
1782
perror("asprintf");
1947
perror_plus("asprintf");
1783
1948
continue;
1784
1949
}
1785
1950
ret = remove(fullname);
1789
1954
}
1790
1955
free(fullname);
1791
1956
}
1792
closedir(d);
1957
}
1958
1959
/* need to be cleaned even if ret == 0 because man page doesn't
1960
specify */
1961
free(direntries);
1962
if (ret == -1){
1963
perror_plus("scandir");
1793
1964
}
1794
1965
ret = rmdir(tempdir);
1795
1966
if(ret == -1 and errno != ENOENT){
1796
perror("rmdir");
1967
perror_plus("rmdir");
1797
1968
}
1798
1969
}
1799
1970
1804
1975
&old_sigterm_action,
1805
1976
NULL));
1806
1977
if(ret == -1){
1807
perror("sigaction");
1978
perror_plus("sigaction");
1808
1979
}
1809
1980
do {
1810
1981
ret = raise(signal_received);
1811
1982
} while(ret != 0 and errno == EINTR);
1812
1983
if(ret != 0){
1813
perror("raise");
1984
perror_plus("raise");
1814
1985
abort();
1815
1986
}
1816
1987
TEMP_FAILURE_RETRY(pause());
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0