To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to plugins.d/mandos-client.c
- browse files at revision 474
- compare with another revision
- download diff
- download tarball
- view history from revision 474
- Committer: teddy at bsnet
- Date: 2011-03-15 19:15:24 UTC
- Revision ID: teddy@fukt.bsnet.se-20110315191524-jc3ajgqu2za7dcly
* mandos: Use the new argparse library instead of optparse.
* debian/control (mandos): Depend on python (<=2.7) | python-argparse
* debian/control (mandos): Depend on python (<=2.7) | python-argparse
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,
66
program_invocation_short_name */
65
#include <errno.h> /* perror(), errno */
67
66
#include <time.h> /* nanosleep(), time(), sleep() */
68
67
#include <net/if.h> /* ioctl, ifreq, SIOCGIFFLAGS, IFF_UP,
69
68
SIOCSIFFLAGS, if_indextoname(),
74
73
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
74
getuid(), getgid(), seteuid(),
76
75
setgid(), pause() */
77
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
76
#include <arpa/inet.h> /* inet_pton(), htons */
78
77
#include <iso646.h> /* not, or, and */
79
78
#include <argp.h> /* struct argp_option, error_t, struct
80
79
argp_state, struct argp,
131
130
static const char sys_class_net[] = "/sys/class/net";
132
131
char *connect_to = NULL;
133
132
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
145
133
/* Used for passing in values through the Avahi callback functions */
146
134
typedef struct {
147
135
AvahiSimplePoll *simple_poll;
151
139
gnutls_dh_params_t dh_params;
152
140
const char *priority;
153
141
gpgme_ctx_t ctx;
154
server *current_server;
155
142
} mandos_context;
156
143
157
144
/* global context so signal handler can reach it*/
158
145
mandos_context mc = { .simple_poll = NULL, .server = NULL,
159
146
.dh_bits = 1024, .priority = "SECURE256"
160
":!CTYPE-X.509:+CTYPE-OPENPGP",
161
.current_server = NULL };
147
":!CTYPE-X.509:+CTYPE-OPENPGP" };
162
148
163
149
sig_atomic_t quit_now = 0;
164
150
int signal_received = 0;
165
151
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
173
152
/*
174
153
* Make additional room in "buffer" for at least BUFFER_SIZE more
175
154
* bytes. "buffer_capacity" is how much is currently allocated,
187
166
return buffer_capacity;
188
167
}
189
168
190
/* Add server to set of servers to retry periodically */
191
int add_server(const char *ip, uint16_t port,
192
AvahiIfIndex if_index,
193
int af){
194
int ret;
195
server *new_server = malloc(sizeof(server));
196
if(new_server == NULL){
197
perror_plus("malloc");
198
return -1;
199
}
200
*new_server = (server){ .ip = strdup(ip),
201
.port = port,
202
.if_index = if_index,
203
.af = af };
204
if(new_server->ip == NULL){
205
perror_plus("strdup");
206
return -1;
207
}
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 */
214
} else {
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;
219
}
220
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
221
if(ret == -1){
222
perror_plus("clock_gettime");
223
return -1;
224
}
225
return 0;
226
}
227
228
169
/*
229
170
* Initialize GPGME.
230
171
*/
244
185
245
186
fd = (int)TEMP_FAILURE_RETRY(open(filename, O_RDONLY));
246
187
if(fd == -1){
247
perror_plus("open");
188
perror("open");
248
189
return false;
249
190
}
250
191
264
205
265
206
ret = (int)TEMP_FAILURE_RETRY(close(fd));
266
207
if(ret == -1){
267
perror_plus("close");
208
perror("close");
268
209
}
269
210
gpgme_data_release(pgp_data);
270
211
return true;
283
224
return false;
284
225
}
285
226
286
/* Set GPGME home directory for the OpenPGP engine only */
227
/* Set GPGME home directory for the OpenPGP engine only */
287
228
rc = gpgme_get_engine_info(&engine_info);
288
229
if(rc != GPG_ERR_NO_ERROR){
289
230
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
395
336
396
337
/* Seek back to the beginning of the GPGME plaintext data buffer */
397
338
if(gpgme_data_seek(dh_plain, (off_t)0, SEEK_SET) == -1){
398
perror_plus("gpgme_data_seek");
339
perror("gpgme_data_seek");
399
340
plaintext_length = -1;
400
341
goto decrypt_end;
401
342
}
406
347
(size_t)plaintext_length,
407
348
plaintext_capacity);
408
349
if(plaintext_capacity == 0){
409
perror_plus("incbuffer");
350
perror("incbuffer");
410
351
plaintext_length = -1;
411
352
goto decrypt_end;
412
353
}
419
360
break;
420
361
}
421
362
if(ret < 0){
422
perror_plus("gpgme_data_read");
363
perror("gpgme_data_read");
423
364
plaintext_length = -1;
424
365
goto decrypt_end;
425
366
}
482
423
}
483
424
484
425
/* OpenPGP credentials */
485
ret = gnutls_certificate_allocate_credentials(&mc.cred);
426
gnutls_certificate_allocate_credentials(&mc.cred);
486
427
if(ret != GNUTLS_E_SUCCESS){
487
fprintf(stderr, "GnuTLS memory error: %s\n",
428
fprintf(stderr, "GnuTLS memory error: %s\n", /* Spurious warning
429
from
430
-Wunreachable-code
431
*/
488
432
safer_gnutls_strerror(ret));
489
433
gnutls_global_deinit();
490
434
return -1;
645
589
tcp_sd = socket(pf, SOCK_STREAM, 0);
646
590
if(tcp_sd < 0){
647
591
int e = errno;
648
perror_plus("socket");
592
perror("socket");
649
593
errno = e;
650
594
goto mandos_end;
651
595
}
665
609
}
666
610
if(ret < 0 ){
667
611
int e = errno;
668
perror_plus("inet_pton");
612
perror("inet_pton");
669
613
errno = e;
670
614
goto mandos_end;
671
615
}
707
651
if(af == AF_INET6 and if_index != AVAHI_IF_UNSPEC){
708
652
char interface[IF_NAMESIZE];
709
653
if(if_indextoname((unsigned int)if_index, interface) == NULL){
710
perror_plus("if_indextoname");
654
perror("if_indextoname");
711
655
} else {
712
656
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
713
657
ip, interface, port);
727
671
sizeof(addrstr));
728
672
}
729
673
if(pcret == NULL){
730
perror_plus("inet_ntop");
674
perror("inet_ntop");
731
675
} else {
732
676
if(strcmp(addrstr, ip) != 0){
733
677
fprintf(stderr, "Canonical address form: %s\n", addrstr);
748
692
if(ret < 0){
749
693
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
750
694
int e = errno;
751
perror_plus("connect");
695
perror("connect");
752
696
errno = e;
753
697
}
754
698
goto mandos_end;
767
711
out_size - written));
768
712
if(ret == -1){
769
713
int e = errno;
770
perror_plus("write");
714
perror("write");
771
715
errno = e;
772
716
goto mandos_end;
773
717
}
798
742
goto mandos_end;
799
743
}
800
744
801
/* Spurious warning from -Wint-to-pointer-cast */
802
745
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
803
746
804
747
if(quit_now){
841
784
buffer_capacity);
842
785
if(buffer_capacity == 0){
843
786
int e = errno;
844
perror_plus("incbuffer");
787
perror("incbuffer");
845
788
errno = e;
846
789
goto mandos_end;
847
790
}
952
895
if(e == 0){
953
896
e = errno;
954
897
}
955
perror_plus("close");
898
perror("close");
956
899
}
957
900
gnutls_deinit(session);
958
errno = e;
959
901
if(quit_now){
960
errno = EINTR;
902
e = EINTR;
961
903
retval = -1;
962
904
}
905
errno = e;
963
906
}
964
907
return retval;
965
908
}
1008
951
avahi_proto_to_af(proto));
1009
952
if(ret == 0){
1010
953
avahi_simple_poll_quit(mc.simple_poll);
1011
} else {
1012
ret = add_server(ip, port, interface,
1013
avahi_proto_to_af(proto));
1014
954
}
1015
955
}
1016
956
}
1070
1010
}
1071
1011
}
1072
1012
1073
/* Signal handler that stops main loop after SIGTERM */
1013
/* stop main loop after sigterm has been called */
1074
1014
static void handle_sigterm(int sig){
1075
1015
if(quit_now){
1076
1016
return;
1078
1018
quit_now = 1;
1079
1019
signal_received = sig;
1080
1020
int old_errno = errno;
1081
/* set main loop to exit */
1082
1021
if(mc.simple_poll != NULL){
1083
1022
avahi_simple_poll_quit(mc.simple_poll);
1084
1023
}
1093
1032
int good_interface(const struct dirent *if_entry){
1094
1033
ssize_t ssret;
1095
1034
char *flagname = NULL;
1096
if(if_entry->d_name[0] == '.'){
1097
return 0;
1098
}
1099
1035
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1100
1036
if_entry->d_name);
1101
1037
if(ret < 0){
1102
perror_plus("asprintf");
1038
perror("asprintf");
1039
return 0;
1040
}
1041
if(if_entry->d_name[0] == '.'){
1103
1042
return 0;
1104
1043
}
1105
1044
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1106
1045
if(flags_fd == -1){
1107
perror_plus("open");
1108
free(flagname);
1046
perror("open");
1109
1047
return 0;
1110
1048
}
1111
free(flagname);
1112
1049
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1113
1050
/* read line from flags_fd */
1114
ssize_t to_read = 2+(sizeof(ifreq_flags)*2)+1; /* "0x1003\n" */
1051
ssize_t to_read = (sizeof(ifreq_flags)*2)+3; /* "0x1003\n" */
1115
1052
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1116
1053
flagstring[(size_t)to_read] = '\0';
1117
1054
if(flagstring == NULL){
1118
perror_plus("malloc");
1055
perror("malloc");
1119
1056
close(flags_fd);
1120
1057
return 0;
1121
1058
}
1123
1060
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1124
1061
(size_t)to_read));
1125
1062
if(ssret == -1){
1126
perror_plus("read");
1063
perror("read");
1127
1064
free(flagstring);
1128
1065
close(flags_fd);
1129
1066
return 0;
1174
1111
}
1175
1112
return 0;
1176
1113
}
1177
/* Reject non-ARP interfaces (including dummy interfaces) */
1178
if(flags & IFF_NOARP){
1179
if(debug){
1180
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n",
1181
if_entry->d_name);
1182
}
1183
return 0;
1184
}
1185
1114
/* Accept this device */
1186
1115
if(debug){
1187
1116
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1190
1119
return 1;
1191
1120
}
1192
1121
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'))){
1199
return 0;
1200
}
1201
return 1;
1202
}
1203
1204
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1205
int ret;
1206
struct timespec now;
1207
struct timespec waited_time;
1208
intmax_t block_time;
1209
1210
while(true){
1211
if(mc.current_server == NULL){
1212
if (debug){
1213
fprintf(stderr,
1214
"Wait until first server is found. No timeout!\n");
1215
}
1216
ret = avahi_simple_poll_iterate(s, -1);
1217
} else {
1218
if (debug){
1219
fprintf(stderr, "Check current_server if we should run it,"
1220
" or wait\n");
1221
}
1222
/* the current time */
1223
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1224
if(ret == -1){
1225
perror_plus("clock_gettime");
1226
return -1;
1227
}
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));
1240
1241
if (debug){
1242
fprintf(stderr, "Blocking for %" PRIdMAX " ms\n", block_time);
1243
}
1244
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);
1250
if(ret == 0){
1251
avahi_simple_poll_quit(mc.simple_poll);
1252
return 0;
1253
}
1254
ret = clock_gettime(CLOCK_MONOTONIC,
1255
&mc.current_server->last_seen);
1256
if(ret == -1){
1257
perror_plus("clock_gettime");
1258
return -1;
1259
}
1260
mc.current_server = mc.current_server->next;
1261
block_time = 0; /* Call avahi to find new Mandos
1262
servers, but don't block */
1263
}
1264
1265
ret = avahi_simple_poll_iterate(s, (int)block_time);
1266
}
1267
if(ret != 0){
1268
if (ret > 0 or errno != EINTR) {
1269
return (ret != 1) ? ret : 0;
1270
}
1271
}
1272
}
1273
}
1274
1275
1122
int main(int argc, char *argv[]){
1276
1123
AvahiSServiceBrowser *sb = NULL;
1277
1124
int error;
1294
1141
bool gnutls_initialized = false;
1295
1142
bool gpgme_initialized = false;
1296
1143
float delay = 2.5f;
1297
double retry_interval = 10; /* 10s between trying a server and
1298
retrying the same server again */
1299
1144
1300
1145
struct sigaction old_sigterm_action = { .sa_handler = SIG_DFL };
1301
1146
struct sigaction sigterm_action = { .sa_handler = handle_sigterm };
1307
1152
errno = 0;
1308
1153
ret = setgid(gid);
1309
1154
if(ret == -1){
1310
perror_plus("setgid");
1155
perror("setgid");
1311
1156
}
1312
1157
1313
1158
/* Lower user privileges (temporarily) */
1314
1159
errno = 0;
1315
1160
ret = seteuid(uid);
1316
1161
if(ret == -1){
1317
perror_plus("seteuid");
1162
perror("seteuid");
1318
1163
}
1319
1164
1320
1165
if(quit_now){
1355
1200
.arg = "SECONDS",
1356
1201
.doc = "Maximum delay to wait for interface startup",
1357
1202
.group = 2 },
1358
{ .name = "retry", .key = 132,
1359
.arg = "SECONDS",
1360
.doc = "Retry interval used when denied by the mandos server",
1361
.group = 2 },
1362
1203
/*
1363
1204
* These reproduce what we would get without ARGP_NO_HELP
1364
1205
*/
1408
1249
if(errno != 0 or tmp == arg or *tmp != '\0'){
1409
1250
argp_error(state, "Bad delay");
1410
1251
}
1411
case 132: /* --retry */
1412
errno = 0;
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");
1418
}
1419
1252
break;
1420
1253
/*
1421
1254
* These reproduce what we would get without ARGP_NO_HELP
1449
1282
case ENOMEM:
1450
1283
default:
1451
1284
errno = ret;
1452
perror_plus("argp_parse");
1285
perror("argp_parse");
1453
1286
exitcode = EX_OSERR;
1454
1287
goto end;
1455
1288
case EINVAL:
1457
1290
goto end;
1458
1291
}
1459
1292
}
1460
1461
{
1462
/* Work around Debian bug #633582:
1463
<http://bugs.debian.org/633582> */
1464
struct stat st;
1465
1466
/* Re-raise priviliges */
1467
errno = 0;
1468
ret = seteuid(0);
1469
if(ret == -1){
1470
perror_plus("seteuid");
1471
}
1472
1473
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1474
int seckey_fd = open(seckey, O_RDONLY);
1475
if(seckey_fd == -1){
1476
perror_plus("open");
1477
} else {
1478
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1479
if(ret == -1){
1480
perror_plus("fstat");
1481
} else {
1482
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1483
ret = fchown(seckey_fd, uid, gid);
1484
if(ret == -1){
1485
perror_plus("fchown");
1486
}
1487
}
1488
}
1489
TEMP_FAILURE_RETRY(close(seckey_fd));
1490
}
1491
}
1492
1493
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1494
int pubkey_fd = open(pubkey, O_RDONLY);
1495
if(pubkey_fd == -1){
1496
perror_plus("open");
1497
} else {
1498
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1499
if(ret == -1){
1500
perror_plus("fstat");
1501
} else {
1502
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1503
ret = fchown(pubkey_fd, uid, gid);
1504
if(ret == -1){
1505
perror_plus("fchown");
1506
}
1507
}
1508
}
1509
TEMP_FAILURE_RETRY(close(pubkey_fd));
1510
}
1511
}
1512
1513
/* Lower privileges */
1514
errno = 0;
1515
ret = seteuid(uid);
1516
if(ret == -1){
1517
perror_plus("seteuid");
1518
}
1519
}
1520
1293
1521
1294
if(not debug){
1522
1295
avahi_set_log_function(empty_log);
1533
1306
fprintf(stderr, "Using interface \"%s\"\n", interface);
1534
1307
}
1535
1308
if(interface == NULL){
1536
perror_plus("malloc");
1309
perror("malloc");
1537
1310
free(direntries);
1538
1311
exitcode = EXIT_FAILURE;
1539
1312
goto end;
1561
1334
sigemptyset(&sigterm_action.sa_mask);
1562
1335
ret = sigaddset(&sigterm_action.sa_mask, SIGINT);
1563
1336
if(ret == -1){
1564
perror_plus("sigaddset");
1337
perror("sigaddset");
1565
1338
exitcode = EX_OSERR;
1566
1339
goto end;
1567
1340
}
1568
1341
ret = sigaddset(&sigterm_action.sa_mask, SIGHUP);
1569
1342
if(ret == -1){
1570
perror_plus("sigaddset");
1343
perror("sigaddset");
1571
1344
exitcode = EX_OSERR;
1572
1345
goto end;
1573
1346
}
1574
1347
ret = sigaddset(&sigterm_action.sa_mask, SIGTERM);
1575
1348
if(ret == -1){
1576
perror_plus("sigaddset");
1349
perror("sigaddset");
1577
1350
exitcode = EX_OSERR;
1578
1351
goto end;
1579
1352
}
1583
1356
*/
1584
1357
ret = sigaction(SIGINT, NULL, &old_sigterm_action);
1585
1358
if(ret == -1){
1586
perror_plus("sigaction");
1359
perror("sigaction");
1587
1360
return EX_OSERR;
1588
1361
}
1589
1362
if(old_sigterm_action.sa_handler != SIG_IGN){
1590
1363
ret = sigaction(SIGINT, &sigterm_action, NULL);
1591
1364
if(ret == -1){
1592
perror_plus("sigaction");
1365
perror("sigaction");
1593
1366
exitcode = EX_OSERR;
1594
1367
goto end;
1595
1368
}
1596
1369
}
1597
1370
ret = sigaction(SIGHUP, NULL, &old_sigterm_action);
1598
1371
if(ret == -1){
1599
perror_plus("sigaction");
1372
perror("sigaction");
1600
1373
return EX_OSERR;
1601
1374
}
1602
1375
if(old_sigterm_action.sa_handler != SIG_IGN){
1603
1376
ret = sigaction(SIGHUP, &sigterm_action, NULL);
1604
1377
if(ret == -1){
1605
perror_plus("sigaction");
1378
perror("sigaction");
1606
1379
exitcode = EX_OSERR;
1607
1380
goto end;
1608
1381
}
1609
1382
}
1610
1383
ret = sigaction(SIGTERM, NULL, &old_sigterm_action);
1611
1384
if(ret == -1){
1612
perror_plus("sigaction");
1385
perror("sigaction");
1613
1386
return EX_OSERR;
1614
1387
}
1615
1388
if(old_sigterm_action.sa_handler != SIG_IGN){
1616
1389
ret = sigaction(SIGTERM, &sigterm_action, NULL);
1617
1390
if(ret == -1){
1618
perror_plus("sigaction");
1391
perror("sigaction");
1619
1392
exitcode = EX_OSERR;
1620
1393
goto end;
1621
1394
}
1638
1411
errno = 0;
1639
1412
ret = seteuid(0);
1640
1413
if(ret == -1){
1641
perror_plus("seteuid");
1414
perror("seteuid");
1642
1415
}
1643
1416
1644
1417
#ifdef __linux__
1648
1421
bool restore_loglevel = true;
1649
1422
if(ret == -1){
1650
1423
restore_loglevel = false;
1651
perror_plus("klogctl");
1424
perror("klogctl");
1652
1425
}
1653
1426
#endif /* __linux__ */
1654
1427
1655
1428
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1656
1429
if(sd < 0){
1657
perror_plus("socket");
1430
perror("socket");
1658
1431
exitcode = EX_OSERR;
1659
1432
#ifdef __linux__
1660
1433
if(restore_loglevel){
1661
1434
ret = klogctl(7, NULL, 0);
1662
1435
if(ret == -1){
1663
perror_plus("klogctl");
1436
perror("klogctl");
1664
1437
}
1665
1438
}
1666
1439
#endif /* __linux__ */
1668
1441
errno = 0;
1669
1442
ret = seteuid(uid);
1670
1443
if(ret == -1){
1671
perror_plus("seteuid");
1444
perror("seteuid");
1672
1445
}
1673
1446
goto end;
1674
1447
}
1675
1448
strcpy(network.ifr_name, interface);
1676
1449
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1677
1450
if(ret == -1){
1678
perror_plus("ioctl SIOCGIFFLAGS");
1451
perror("ioctl SIOCGIFFLAGS");
1679
1452
#ifdef __linux__
1680
1453
if(restore_loglevel){
1681
1454
ret = klogctl(7, NULL, 0);
1682
1455
if(ret == -1){
1683
perror_plus("klogctl");
1456
perror("klogctl");
1684
1457
}
1685
1458
}
1686
1459
#endif /* __linux__ */
1689
1462
errno = 0;
1690
1463
ret = seteuid(uid);
1691
1464
if(ret == -1){
1692
perror_plus("seteuid");
1465
perror("seteuid");
1693
1466
}
1694
1467
goto end;
1695
1468
}
1699
1472
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1700
1473
if(ret == -1){
1701
1474
take_down_interface = false;
1702
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1475
perror("ioctl SIOCSIFFLAGS +IFF_UP");
1703
1476
exitcode = EX_OSERR;
1704
1477
#ifdef __linux__
1705
1478
if(restore_loglevel){
1706
1479
ret = klogctl(7, NULL, 0);
1707
1480
if(ret == -1){
1708
perror_plus("klogctl");
1481
perror("klogctl");
1709
1482
}
1710
1483
}
1711
1484
#endif /* __linux__ */
1713
1486
errno = 0;
1714
1487
ret = seteuid(uid);
1715
1488
if(ret == -1){
1716
perror_plus("seteuid");
1489
perror("seteuid");
1717
1490
}
1718
1491
goto end;
1719
1492
}
1720
1493
}
1721
/* Sleep checking until interface is running.
1722
Check every 0.25s, up to total time of delay */
1494
/* sleep checking until interface is running */
1723
1495
for(int i=0; i < delay * 4; i++){
1724
1496
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1725
1497
if(ret == -1){
1726
perror_plus("ioctl SIOCGIFFLAGS");
1498
perror("ioctl SIOCGIFFLAGS");
1727
1499
} else if(network.ifr_flags & IFF_RUNNING){
1728
1500
break;
1729
1501
}
1730
1502
struct timespec sleeptime = { .tv_nsec = 250000000 };
1731
1503
ret = nanosleep(&sleeptime, NULL);
1732
1504
if(ret == -1 and errno != EINTR){
1733
perror_plus("nanosleep");
1505
perror("nanosleep");
1734
1506
}
1735
1507
}
1736
1508
if(not take_down_interface){
1737
1509
/* We won't need the socket anymore */
1738
1510
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1739
1511
if(ret == -1){
1740
perror_plus("close");
1512
perror("close");
1741
1513
}
1742
1514
}
1743
1515
#ifdef __linux__
1745
1517
/* Restores kernel loglevel to default */
1746
1518
ret = klogctl(7, NULL, 0);
1747
1519
if(ret == -1){
1748
perror_plus("klogctl");
1520
perror("klogctl");
1749
1521
}
1750
1522
}
1751
1523
#endif /* __linux__ */
1755
1527
/* Lower privileges */
1756
1528
ret = seteuid(uid);
1757
1529
if(ret == -1){
1758
perror_plus("seteuid");
1530
perror("seteuid");
1759
1531
}
1760
1532
} else {
1761
1533
/* Lower privileges permanently */
1762
1534
ret = setuid(uid);
1763
1535
if(ret == -1){
1764
perror_plus("setuid");
1536
perror("setuid");
1765
1537
}
1766
1538
}
1767
1539
}
1783
1555
goto end;
1784
1556
}
1785
1557
1558
tempdir_created = true;
1786
1559
if(mkdtemp(tempdir) == NULL){
1787
perror_plus("mkdtemp");
1560
tempdir_created = false;
1561
perror("mkdtemp");
1788
1562
goto end;
1789
1563
}
1790
tempdir_created = true;
1791
1564
1792
1565
if(quit_now){
1793
1566
goto end;
1835
1608
1836
1609
port = (uint16_t)tmpmax;
1837
1610
*address = '\0';
1611
address = connect_to;
1838
1612
/* Colon in address indicates IPv6 */
1839
1613
int af;
1840
if(strchr(connect_to, ':') != NULL){
1614
if(strchr(address, ':') != NULL){
1841
1615
af = AF_INET6;
1842
/* Accept [] around IPv6 address - see RFC 5952 */
1843
if(connect_to[0] == '[' and address[-1] == ']')
1844
{
1845
connect_to++;
1846
address[-1] = '\0';
1847
}
1848
1616
} else {
1849
1617
af = AF_INET;
1850
1618
}
1851
address = connect_to;
1852
1619
1853
1620
if(quit_now){
1854
1621
goto end;
1855
1622
}
1856
1623
1857
1624
while(not quit_now){
1858
1625
ret = start_mandos_communication(address, port, if_index, af);
1859
1626
if(quit_now or ret == 0){
1860
1627
break;
1861
1628
}
1862
if(debug){
1863
fprintf(stderr, "Retrying in %d seconds\n",
1864
(int)retry_interval);
1865
}
1866
sleep((int)retry_interval);
1867
}
1868
1629
sleep(15);
1630
};
1631
1869
1632
if (not quit_now){
1870
1633
exitcode = EXIT_SUCCESS;
1871
1634
}
1927
1690
if(debug){
1928
1691
fprintf(stderr, "Starting Avahi loop search\n");
1929
1692
}
1930
1931
ret = avahi_loop_with_timeout(mc.simple_poll,
1932
(int)(retry_interval * 1000));
1933
if(debug){
1934
fprintf(stderr, "avahi_loop_with_timeout exited %s\n",
1935
(ret == 0) ? "successfully" : "with error");
1936
}
1693
1694
avahi_simple_poll_loop(mc.simple_poll);
1937
1695
1938
1696
end:
1939
1697
1960
1718
if(gpgme_initialized){
1961
1719
gpgme_release(mc.ctx);
1962
1720
}
1963
1964
/* Cleans up the circular linked list of Mandos servers the client
1965
has seen */
1966
if(mc.current_server != NULL){
1967
mc.current_server->prev->next = NULL;
1968
while(mc.current_server != NULL){
1969
server *next = mc.current_server->next;
1970
free(mc.current_server);
1971
mc.current_server = next;
1972
}
1973
}
1974
1721
1975
1722
/* Take down the network interface */
1976
1723
if(take_down_interface){
1978
1725
errno = 0;
1979
1726
ret = seteuid(0);
1980
1727
if(ret == -1){
1981
perror_plus("seteuid");
1728
perror("seteuid");
1982
1729
}
1983
1730
if(geteuid() == 0){
1984
1731
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1985
1732
if(ret == -1){
1986
perror_plus("ioctl SIOCGIFFLAGS");
1733
perror("ioctl SIOCGIFFLAGS");
1987
1734
} else if(network.ifr_flags & IFF_UP) {
1988
1735
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1989
1736
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1990
1737
if(ret == -1){
1991
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1738
perror("ioctl SIOCSIFFLAGS -IFF_UP");
1992
1739
}
1993
1740
}
1994
1741
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1995
1742
if(ret == -1){
1996
perror_plus("close");
1743
perror("close");
1997
1744
}
1998
1745
/* Lower privileges permanently */
1999
1746
errno = 0;
2000
1747
ret = setuid(uid);
2001
1748
if(ret == -1){
2002
perror_plus("setuid");
1749
perror("setuid");
2003
1750
}
2004
1751
}
2005
1752
}
2006
1753
2007
/* Removes the GPGME temp directory and all files inside */
1754
/* Removes the temp directory used by GPGME */
2008
1755
if(tempdir_created){
2009
struct dirent **direntries = NULL;
2010
struct dirent *direntry = NULL;
2011
int numentries = scandir(tempdir, &direntries, notdotentries,
2012
alphasort);
2013
if (numentries > 0){
2014
for(int i = 0; i < numentries; i++){
2015
direntry = direntries[i];
1756
DIR *d;
1757
struct dirent *direntry;
1758
d = opendir(tempdir);
1759
if(d == NULL){
1760
if(errno != ENOENT){
1761
perror("opendir");
1762
}
1763
} else {
1764
while(true){
1765
direntry = readdir(d);
1766
if(direntry == NULL){
1767
break;
1768
}
1769
/* Skip "." and ".." */
1770
if(direntry->d_name[0] == '.'
1771
and (direntry->d_name[1] == '\0'
1772
or (direntry->d_name[1] == '.'
1773
and direntry->d_name[2] == '\0'))){
1774
continue;
1775
}
2016
1776
char *fullname = NULL;
2017
1777
ret = asprintf(&fullname, "%s/%s", tempdir,
2018
1778
direntry->d_name);
2019
1779
if(ret < 0){
2020
perror_plus("asprintf");
1780
perror("asprintf");
2021
1781
continue;
2022
1782
}
2023
1783
ret = remove(fullname);
2027
1787
}
2028
1788
free(fullname);
2029
1789
}
2030
}
2031
2032
/* need to clean even if 0 because man page doesn't specify */
2033
free(direntries);
2034
if (numentries == -1){
2035
perror_plus("scandir");
1790
closedir(d);
2036
1791
}
2037
1792
ret = rmdir(tempdir);
2038
1793
if(ret == -1 and errno != ENOENT){
2039
perror_plus("rmdir");
1794
perror("rmdir");
2040
1795
}
2041
1796
}
2042
1797
2047
1802
&old_sigterm_action,
2048
1803
NULL));
2049
1804
if(ret == -1){
2050
perror_plus("sigaction");
1805
perror("sigaction");
2051
1806
}
2052
1807
do {
2053
1808
ret = raise(signal_received);
2054
1809
} while(ret != 0 and errno == EINTR);
2055
1810
if(ret != 0){
2056
perror_plus("raise");
1811
perror("raise");
2057
1812
abort();
2058
1813
}
2059
1814
TEMP_FAILURE_RETRY(pause());
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0