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 668
- compare with another revision
- download diff
- download tarball
- view history from revision 668
- Committer: Teddy Hogeborn
- Date: 2014-03-10 06:34:36 UTC
- Revision ID: teddy@recompile.se-20140310063436-zksdghqvv6k1pbyg
Do not add a new server to server list if clock_gettime() fails
* plugins.d/mandos-client.c (add_server): Set server.last_seen before
adding new server, in case
clock_gettime() fails.
* plugins.d/mandos-client.c (add_server): Set server.last_seen before
adding new server, in case
clock_gettime() fails.
- files added:
- debian/upstream-signing-key.pgp
- files removed:
- debian/upstream
- files modified:
- DBUS-API
added
removed
plugins.d/mandos-client.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008-2014 Teddy Hogeborn
13
* Copyright © 2008-2014 Björn Påhlsson
12
* Copyright © 2008-2013 Teddy Hogeborn
13
* Copyright © 2008-2013 Björn Påhlsson
14
14
*
15
15
* This program is free software: you can redistribute it and/or
16
16
* modify it under the terms of the GNU General Public License as
32
32
/* Needed by GPGME, specifically gpgme_data_seek() */
33
33
#ifndef _LARGEFILE_SOURCE
34
34
#define _LARGEFILE_SOURCE
35
#endif /* not _LARGEFILE_SOURCE */
35
#endif
36
36
#ifndef _FILE_OFFSET_BITS
37
37
#define _FILE_OFFSET_BITS 64
38
#endif /* not _FILE_OFFSET_BITS */
38
#endif
39
39
40
40
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
41
41
42
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
stdout, ferror() */
43
stdout, ferror(), remove() */
44
44
#include <stdint.h> /* uint16_t, uint32_t, intptr_t */
45
45
#include <stddef.h> /* NULL, size_t, ssize_t */
46
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
57
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
58
inet_pton(), connect(),
59
59
getnameinfo() */
60
#include <fcntl.h> /* open(), unlinkat() */
60
#include <fcntl.h> /* open() */
61
61
#include <dirent.h> /* opendir(), struct dirent, readdir()
62
62
*/
63
63
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
73
73
*/
74
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
75
getuid(), getgid(), seteuid(),
76
setgid(), pause(), _exit(),
77
unlinkat() */
76
setgid(), pause(), _exit() */
78
77
#include <arpa/inet.h> /* inet_pton(), htons() */
79
78
#include <iso646.h> /* not, or, and */
80
79
#include <argp.h> /* struct argp_option, error_t, struct
142
141
static const char sys_class_net[] = "/sys/class/net";
143
142
char *connect_to = NULL;
144
143
const char *hookdir = HOOKDIR;
145
int hookdir_fd = -1;
146
144
uid_t uid = 65534;
147
145
gid_t gid = 65534;
148
146
185
183
perror(print_text);
186
184
}
187
185
188
__attribute__((format (gnu_printf, 2, 3), nonnull))
186
__attribute__((format (gnu_printf, 2, 3)))
189
187
int fprintf_plus(FILE *stream, const char *format, ...){
190
188
va_list ap;
191
189
va_start (ap, format);
200
198
* bytes. "buffer_capacity" is how much is currently allocated,
201
199
* "buffer_length" is how much is already used.
202
200
*/
203
__attribute__((nonnull, warn_unused_result))
204
201
size_t incbuffer(char **buffer, size_t buffer_length,
205
202
size_t buffer_capacity){
206
203
if(buffer_length + BUFFER_SIZE > buffer_capacity){
219
216
}
220
217
221
218
/* Add server to set of servers to retry periodically */
222
__attribute__((nonnull, warn_unused_result))
223
219
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
224
220
int af, server **current_server){
225
221
int ret;
234
230
.af = af };
235
231
if(new_server->ip == NULL){
236
232
perror_plus("strdup");
237
free(new_server);
238
233
return false;
239
234
}
240
235
ret = clock_gettime(CLOCK_MONOTONIC, &(new_server->last_seen));
241
236
if(ret == -1){
242
237
perror_plus("clock_gettime");
243
#ifdef __GNUC__
244
#pragma GCC diagnostic push
245
#pragma GCC diagnostic ignored "-Wcast-qual"
246
#endif
247
free((char *)(new_server->ip));
248
#ifdef __GNUC__
249
#pragma GCC diagnostic pop
250
#endif
251
free(new_server);
252
238
return false;
253
239
}
254
240
/* Special case of first server */
256
242
new_server->next = new_server;
257
243
new_server->prev = new_server;
258
244
*current_server = new_server;
245
/* Place the new server last in the list */
259
246
} else {
260
/* Place the new server last in the list */
261
247
new_server->next = *current_server;
262
248
new_server->prev = (*current_server)->prev;
263
249
new_server->prev->next = new_server;
269
255
/*
270
256
* Initialize GPGME.
271
257
*/
272
__attribute__((nonnull, warn_unused_result))
273
static bool init_gpgme(const char * const seckey,
274
const char * const pubkey,
275
const char * const tempdir,
276
mandos_context *mc){
258
static bool init_gpgme(const char *seckey, const char *pubkey,
259
const char *tempdir, mandos_context *mc){
277
260
gpgme_error_t rc;
278
261
gpgme_engine_info_t engine_info;
279
262
280
263
/*
281
264
* Helper function to insert pub and seckey to the engine keyring.
282
265
*/
283
bool import_key(const char * const filename){
266
bool import_key(const char *filename){
284
267
int ret;
285
268
int fd;
286
269
gpgme_data_t pgp_data;
367
350
* Decrypt OpenPGP data.
368
351
* Returns -1 on error
369
352
*/
370
__attribute__((nonnull, warn_unused_result))
371
353
static ssize_t pgp_packet_decrypt(const char *cryptotext,
372
354
size_t crypto_size,
373
355
char **plaintext,
493
475
return plaintext_length;
494
476
}
495
477
496
__attribute__((warn_unused_result, const))
497
static const char *safe_string(const char *str){
498
if(str == NULL)
499
return "(unknown)";
500
return str;
501
}
502
503
__attribute__((warn_unused_result))
504
static const char *safer_gnutls_strerror(int value){
478
static const char * safer_gnutls_strerror(int value){
505
479
const char *ret = gnutls_strerror(value);
506
return safe_string(ret);
480
if(ret == NULL)
481
ret = "(unknown)";
482
return ret;
507
483
}
508
484
509
485
/* GnuTLS log function callback */
510
__attribute__((nonnull))
511
486
static void debuggnutls(__attribute__((unused)) int level,
512
487
const char* string){
513
488
fprintf_plus(stderr, "GnuTLS: %s", string);
514
489
}
515
490
516
__attribute__((nonnull, warn_unused_result))
517
491
static int init_gnutls_global(const char *pubkeyfilename,
518
492
const char *seckeyfilename,
519
493
mandos_context *mc){
520
494
int ret;
521
unsigned int uret;
522
495
523
496
if(debug){
524
497
fprintf_plus(stderr, "Initializing GnuTLS\n");
575
548
safer_gnutls_strerror(ret));
576
549
goto globalfail;
577
550
}
578
if(mc->dh_bits == 0){
579
/* Find out the optimal number of DH bits */
580
/* Try to read the private key file */
581
gnutls_datum_t buffer = { .data = NULL, .size = 0 };
582
{
583
int secfile = open(seckeyfilename, O_RDONLY);
584
size_t buffer_capacity = 0;
585
while(true){
586
buffer_capacity = incbuffer((char **)&buffer.data,
587
(size_t)buffer.size,
588
(size_t)buffer_capacity);
589
if(buffer_capacity == 0){
590
perror_plus("incbuffer");
591
free(buffer.data);
592
buffer.data = NULL;
593
break;
594
}
595
ssize_t bytes_read = read(secfile, buffer.data + buffer.size,
596
BUFFER_SIZE);
597
/* EOF */
598
if(bytes_read == 0){
599
break;
600
}
601
/* check bytes_read for failure */
602
if(bytes_read < 0){
603
perror_plus("read");
604
free(buffer.data);
605
buffer.data = NULL;
606
break;
607
}
608
buffer.size += (unsigned int)bytes_read;
609
}
610
close(secfile);
611
}
612
/* If successful, use buffer to parse private key */
613
gnutls_sec_param_t sec_param = GNUTLS_SEC_PARAM_ULTRA;
614
if(buffer.data != NULL){
615
{
616
gnutls_openpgp_privkey_t privkey = NULL;
617
ret = gnutls_openpgp_privkey_init(&privkey);
618
if(ret != GNUTLS_E_SUCCESS){
619
fprintf_plus(stderr, "Error initializing OpenPGP key"
620
" structure: %s", safer_gnutls_strerror(ret));
621
free(buffer.data);
622
buffer.data = NULL;
623
} else {
624
ret = gnutls_openpgp_privkey_import(privkey, &buffer,
625
GNUTLS_OPENPGP_FMT_BASE64,
626
"", 0);
627
if(ret != GNUTLS_E_SUCCESS){
628
fprintf_plus(stderr, "Error importing OpenPGP key : %s",
629
safer_gnutls_strerror(ret));
630
privkey = NULL;
631
}
632
free(buffer.data);
633
buffer.data = NULL;
634
if(privkey != NULL){
635
/* Use private key to suggest an appropriate sec_param */
636
sec_param = gnutls_openpgp_privkey_sec_param(privkey);
637
gnutls_openpgp_privkey_deinit(privkey);
638
if(debug){
639
fprintf_plus(stderr, "This OpenPGP key implies using a"
640
" GnuTLS security parameter \"%s\".\n",
641
safe_string(gnutls_sec_param_get_name
642
(sec_param)));
643
}
644
}
645
}
646
}
647
if(sec_param == GNUTLS_SEC_PARAM_UNKNOWN){
648
/* Err on the side of caution */
649
sec_param = GNUTLS_SEC_PARAM_ULTRA;
650
if(debug){
651
fprintf_plus(stderr, "Falling back to security parameter"
652
" \"%s\"\n",
653
safe_string(gnutls_sec_param_get_name
654
(sec_param)));
655
}
656
}
657
}
658
uret = gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH, sec_param);
659
if(uret != 0){
660
mc->dh_bits = uret;
661
if(debug){
662
fprintf_plus(stderr, "A \"%s\" GnuTLS security parameter"
663
" implies %u DH bits; using that.\n",
664
safe_string(gnutls_sec_param_get_name
665
(sec_param)),
666
mc->dh_bits);
667
}
668
} else {
669
fprintf_plus(stderr, "Failed to get implied number of DH"
670
" bits for security parameter \"%s\"): %s\n",
671
safe_string(gnutls_sec_param_get_name(sec_param)),
672
safer_gnutls_strerror(ret));
673
goto globalfail;
674
}
675
} else if(debug){
676
fprintf_plus(stderr, "DH bits explicitly set to %u\n",
677
mc->dh_bits);
678
}
679
551
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
680
552
if(ret != GNUTLS_E_SUCCESS){
681
fprintf_plus(stderr, "Error in GnuTLS prime generation (%u bits):"
682
" %s\n", mc->dh_bits, safer_gnutls_strerror(ret));
553
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
554
safer_gnutls_strerror(ret));
683
555
goto globalfail;
684
556
}
685
557
695
567
return -1;
696
568
}
697
569
698
__attribute__((nonnull, warn_unused_result))
699
570
static int init_gnutls_session(gnutls_session_t *session,
700
571
mandos_context *mc){
701
572
int ret;
758
629
__attribute__((unused)) const char *txt){}
759
630
760
631
/* Called when a Mandos server is found */
761
__attribute__((nonnull, warn_unused_result))
762
632
static int start_mandos_communication(const char *ip, in_port_t port,
763
633
AvahiIfIndex if_index,
764
634
int af, mandos_context *mc){
765
635
int ret, tcp_sd = -1;
766
636
ssize_t sret;
767
struct sockaddr_storage to;
637
union {
638
struct sockaddr_in in;
639
struct sockaddr_in6 in6;
640
} to;
768
641
char *buffer = NULL;
769
642
char *decrypted_buffer = NULL;
770
643
size_t buffer_length = 0;
851
724
852
725
memset(&to, 0, sizeof(to));
853
726
if(af == AF_INET6){
854
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
855
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
727
to.in6.sin6_family = (sa_family_t)af;
728
ret = inet_pton(af, ip, &to.in6.sin6_addr);
856
729
} else { /* IPv4 */
857
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
858
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
730
to.in.sin_family = (sa_family_t)af;
731
ret = inet_pton(af, ip, &to.in.sin_addr);
859
732
}
860
733
if(ret < 0 ){
861
734
int e = errno;
870
743
goto mandos_end;
871
744
}
872
745
if(af == AF_INET6){
873
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
874
if(IN6_IS_ADDR_LINKLOCAL
875
(&((struct sockaddr_in6 *)&to)->sin6_addr)){
746
to.in6.sin6_port = htons(port);
747
#ifdef __GNUC__
748
#pragma GCC diagnostic push
749
#pragma GCC diagnostic ignored "-Wstrict-aliasing"
750
#endif
751
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
752
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower */
753
#ifdef __GNUC__
754
#pragma GCC diagnostic pop
755
#endif
876
756
if(if_index == AVAHI_IF_UNSPEC){
877
757
fprintf_plus(stderr, "An IPv6 link-local address is"
878
758
" incomplete without a network interface\n");
880
760
goto mandos_end;
881
761
}
882
762
/* Set the network interface number as scope */
883
((struct sockaddr_in6 *)&to)->sin6_scope_id = (uint32_t)if_index;
763
to.in6.sin6_scope_id = (uint32_t)if_index;
884
764
}
885
765
} else {
886
((struct sockaddr_in *)&to)->sin_port = htons(port);
766
to.in.sin_port = htons(port);
887
767
}
888
768
889
769
if(quit_now){
907
787
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
908
788
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
909
789
if(af == AF_INET6){
910
ret = getnameinfo((struct sockaddr *)&to,
911
sizeof(struct sockaddr_in6),
790
ret = getnameinfo((struct sockaddr *)&(to.in6), sizeof(to.in6),
912
791
addrstr, sizeof(addrstr), NULL, 0,
913
792
NI_NUMERICHOST);
914
793
} else {
915
ret = getnameinfo((struct sockaddr *)&to,
916
sizeof(struct sockaddr_in),
794
ret = getnameinfo((struct sockaddr *)&(to.in), sizeof(to.in),
917
795
addrstr, sizeof(addrstr), NULL, 0,
918
796
NI_NUMERICHOST);
919
797
}
932
810
}
933
811
934
812
if(af == AF_INET6){
935
ret = connect(tcp_sd, (struct sockaddr *)&to,
936
sizeof(struct sockaddr_in6));
813
ret = connect(tcp_sd, &to.in6, sizeof(to));
937
814
} else {
938
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
939
sizeof(struct sockaddr_in));
815
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
940
816
}
941
817
if(ret < 0){
942
if((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
818
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
943
819
int e = errno;
944
820
perror_plus("connect");
945
821
errno = e;
1160
1036
return retval;
1161
1037
}
1162
1038
1163
__attribute__((nonnull))
1164
1039
static void resolve_callback(AvahiSServiceResolver *r,
1165
1040
AvahiIfIndex interface,
1166
1041
AvahiProtocol proto,
1174
1049
AVAHI_GCC_UNUSED AvahiStringList *txt,
1175
1050
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1176
1051
flags,
1177
void *mc){
1052
void* mc){
1178
1053
if(r == NULL){
1179
1054
return;
1180
1055
}
1183
1058
timed out */
1184
1059
1185
1060
if(quit_now){
1186
avahi_s_service_resolver_free(r);
1187
1061
return;
1188
1062
}
1189
1063
1234
1108
const char *domain,
1235
1109
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1236
1110
flags,
1237
void *mc){
1111
void* mc){
1238
1112
if(b == NULL){
1239
1113
return;
1240
1114
}
1300
1174
errno = old_errno;
1301
1175
}
1302
1176
1303
__attribute__((nonnull, warn_unused_result))
1304
1177
bool get_flags(const char *ifname, struct ifreq *ifr){
1305
1178
int ret;
1306
1179
error_t ret_errno;
1325
1198
return true;
1326
1199
}
1327
1200
1328
__attribute__((nonnull, warn_unused_result))
1329
1201
bool good_flags(const char *ifname, const struct ifreq *ifr){
1330
1202
1331
1203
/* Reject the loopback device */
1373
1245
* corresponds to an acceptable network device.
1374
1246
* (This function is passed to scandir(3) as a filter function.)
1375
1247
*/
1376
__attribute__((nonnull, warn_unused_result))
1377
1248
int good_interface(const struct dirent *if_entry){
1378
1249
if(if_entry->d_name[0] == '.'){
1379
1250
return 0;
1397
1268
/*
1398
1269
* This function determines if a network interface is up.
1399
1270
*/
1400
__attribute__((nonnull, warn_unused_result))
1401
1271
bool interface_is_up(const char *interface){
1402
1272
struct ifreq ifr;
1403
1273
if(not get_flags(interface, &ifr)){
1414
1284
/*
1415
1285
* This function determines if a network interface is running
1416
1286
*/
1417
__attribute__((nonnull, warn_unused_result))
1418
1287
bool interface_is_running(const char *interface){
1419
1288
struct ifreq ifr;
1420
1289
if(not get_flags(interface, &ifr)){
1428
1297
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1429
1298
}
1430
1299
1431
__attribute__((nonnull, pure, warn_unused_result))
1432
1300
int notdotentries(const struct dirent *direntry){
1433
1301
/* Skip "." and ".." */
1434
1302
if(direntry->d_name[0] == '.'
1441
1309
}
1442
1310
1443
1311
/* Is this directory entry a runnable program? */
1444
__attribute__((nonnull, warn_unused_result))
1445
1312
int runnable_hook(const struct dirent *direntry){
1446
1313
int ret;
1447
1314
size_t sret;
1455
1322
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1456
1323
"abcdefghijklmnopqrstuvwxyz"
1457
1324
"0123456789"
1458
"_.-");
1325
"_-");
1459
1326
if((direntry->d_name)[sret] != '\0'){
1460
1327
/* Contains non-allowed characters */
1461
1328
if(debug){
1465
1332
return 0;
1466
1333
}
1467
1334
1468
ret = fstatat(hookdir_fd, direntry->d_name, &st, 0);
1335
char *fullname = NULL;
1336
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1337
if(ret < 0){
1338
perror_plus("asprintf");
1339
return 0;
1340
}
1341
1342
ret = stat(fullname, &st);
1469
1343
if(ret == -1){
1470
1344
if(debug){
1471
1345
perror_plus("Could not stat hook");
1495
1369
return 1;
1496
1370
}
1497
1371
1498
__attribute__((nonnull, warn_unused_result))
1499
1372
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1500
1373
mandos_context *mc){
1501
1374
int ret;
1505
1378
1506
1379
while(true){
1507
1380
if(mc->current_server == NULL){
1508
if(debug){
1381
if (debug){
1509
1382
fprintf_plus(stderr, "Wait until first server is found."
1510
1383
" No timeout!\n");
1511
1384
}
1512
1385
ret = avahi_simple_poll_iterate(s, -1);
1513
1386
} else {
1514
if(debug){
1387
if (debug){
1515
1388
fprintf_plus(stderr, "Check current_server if we should run"
1516
1389
" it, or wait\n");
1517
1390
}
1534
1407
- ((intmax_t)waited_time.tv_sec * 1000))
1535
1408
- ((intmax_t)waited_time.tv_nsec / 1000000));
1536
1409
1537
if(debug){
1410
if (debug){
1538
1411
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1539
1412
block_time);
1540
1413
}
1562
1435
ret = avahi_simple_poll_iterate(s, (int)block_time);
1563
1436
}
1564
1437
if(ret != 0){
1565
if(ret > 0 or errno != EINTR){
1438
if (ret > 0 or errno != EINTR){
1566
1439
return (ret != 1) ? ret : 0;
1567
1440
}
1568
1441
}
1570
1443
}
1571
1444
1572
1445
/* Set effective uid to 0, return errno */
1573
__attribute__((warn_unused_result))
1574
1446
error_t raise_privileges(void){
1575
1447
error_t old_errno = errno;
1576
1448
error_t ret_errno = 0;
1577
1449
if(seteuid(0) == -1){
1578
1450
ret_errno = errno;
1451
perror_plus("seteuid");
1579
1452
}
1580
1453
errno = old_errno;
1581
1454
return ret_errno;
1582
1455
}
1583
1456
1584
1457
/* Set effective and real user ID to 0. Return errno. */
1585
__attribute__((warn_unused_result))
1586
1458
error_t raise_privileges_permanently(void){
1587
1459
error_t old_errno = errno;
1588
1460
error_t ret_errno = raise_privileges();
1592
1464
}
1593
1465
if(setuid(0) == -1){
1594
1466
ret_errno = errno;
1467
perror_plus("seteuid");
1595
1468
}
1596
1469
errno = old_errno;
1597
1470
return ret_errno;
1598
1471
}
1599
1472
1600
1473
/* Set effective user ID to unprivileged saved user ID */
1601
__attribute__((warn_unused_result))
1602
1474
error_t lower_privileges(void){
1603
1475
error_t old_errno = errno;
1604
1476
error_t ret_errno = 0;
1605
1477
if(seteuid(uid) == -1){
1606
1478
ret_errno = errno;
1479
perror_plus("seteuid");
1607
1480
}
1608
1481
errno = old_errno;
1609
1482
return ret_errno;
1610
1483
}
1611
1484
1612
1485
/* Lower privileges permanently */
1613
__attribute__((warn_unused_result))
1614
1486
error_t lower_privileges_permanently(void){
1615
1487
error_t old_errno = errno;
1616
1488
error_t ret_errno = 0;
1617
1489
if(setuid(uid) == -1){
1618
1490
ret_errno = errno;
1491
perror_plus("setuid");
1619
1492
}
1620
1493
errno = old_errno;
1621
1494
return ret_errno;
1622
1495
}
1623
1496
1624
__attribute__((nonnull))
1625
void run_network_hooks(const char *mode, const char *interface,
1497
bool run_network_hooks(const char *mode, const char *interface,
1626
1498
const float delay){
1627
struct dirent **direntries = NULL;
1628
if(hookdir_fd == -1){
1629
hookdir_fd = open(hookdir, O_RDONLY);
1630
if(hookdir_fd == -1){
1631
if(errno == ENOENT){
1632
if(debug){
1633
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1634
" found\n", hookdir);
1635
}
1636
} else {
1637
perror_plus("open");
1638
}
1639
return;
1640
}
1641
}
1642
#ifdef __GLIBC__
1643
#if __GLIBC_PREREQ(2, 15)
1644
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1645
runnable_hook, alphasort);
1646
#else /* not __GLIBC_PREREQ(2, 15) */
1647
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1648
alphasort);
1649
#endif /* not __GLIBC_PREREQ(2, 15) */
1650
#else /* not __GLIBC__ */
1651
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1652
alphasort);
1653
#endif /* not __GLIBC__ */
1499
struct dirent **direntries;
1500
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1501
alphasort);
1654
1502
if(numhooks == -1){
1655
perror_plus("scandir");
1656
return;
1657
}
1658
struct dirent *direntry;
1659
int ret;
1660
int devnull = open("/dev/null", O_RDONLY);
1661
for(int i = 0; i < numhooks; i++){
1662
direntry = direntries[i];
1663
if(debug){
1664
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1665
direntry->d_name);
1503
if(errno == ENOENT){
1504
if(debug){
1505
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1506
" found\n", hookdir);
1507
}
1508
} else {
1509
perror_plus("scandir");
1666
1510
}
1667
pid_t hook_pid = fork();
1668
if(hook_pid == 0){
1669
/* Child */
1670
/* Raise privileges */
1671
errno = raise_privileges_permanently();
1672
if(errno != 0){
1673
perror_plus("Failed to raise privileges");
1674
_exit(EX_NOPERM);
1675
}
1676
/* Set group */
1677
errno = 0;
1678
ret = setgid(0);
1679
if(ret == -1){
1680
perror_plus("setgid");
1681
_exit(EX_NOPERM);
1682
}
1683
/* Reset supplementary groups */
1684
errno = 0;
1685
ret = setgroups(0, NULL);
1686
if(ret == -1){
1687
perror_plus("setgroups");
1688
_exit(EX_NOPERM);
1689
}
1690
ret = dup2(devnull, STDIN_FILENO);
1691
if(ret == -1){
1692
perror_plus("dup2(devnull, STDIN_FILENO)");
1693
_exit(EX_OSERR);
1694
}
1695
ret = close(devnull);
1696
if(ret == -1){
1697
perror_plus("close");
1698
_exit(EX_OSERR);
1699
}
1700
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1701
if(ret == -1){
1702
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1703
_exit(EX_OSERR);
1704
}
1705
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1706
if(ret == -1){
1707
perror_plus("setenv");
1708
_exit(EX_OSERR);
1709
}
1710
ret = setenv("DEVICE", interface, 1);
1711
if(ret == -1){
1712
perror_plus("setenv");
1713
_exit(EX_OSERR);
1714
}
1715
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1716
if(ret == -1){
1717
perror_plus("setenv");
1718
_exit(EX_OSERR);
1719
}
1720
ret = setenv("MODE", mode, 1);
1721
if(ret == -1){
1722
perror_plus("setenv");
1723
_exit(EX_OSERR);
1724
}
1725
char *delaystring;
1726
ret = asprintf(&delaystring, "%f", (double)delay);
1727
if(ret == -1){
1511
} else {
1512
struct dirent *direntry;
1513
int ret;
1514
int devnull = open("/dev/null", O_RDONLY);
1515
for(int i = 0; i < numhooks; i++){
1516
direntry = direntries[i];
1517
char *fullname = NULL;
1518
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1519
if(ret < 0){
1728
1520
perror_plus("asprintf");
1729
_exit(EX_OSERR);
1730
}
1731
ret = setenv("DELAY", delaystring, 1);
1732
if(ret == -1){
1521
continue;
1522
}
1523
if(debug){
1524
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1525
direntry->d_name);
1526
}
1527
pid_t hook_pid = fork();
1528
if(hook_pid == 0){
1529
/* Child */
1530
/* Raise privileges */
1531
raise_privileges_permanently();
1532
/* Set group */
1533
errno = 0;
1534
ret = setgid(0);
1535
if(ret == -1){
1536
perror_plus("setgid");
1537
}
1538
/* Reset supplementary groups */
1539
errno = 0;
1540
ret = setgroups(0, NULL);
1541
if(ret == -1){
1542
perror_plus("setgroups");
1543
}
1544
dup2(devnull, STDIN_FILENO);
1545
close(devnull);
1546
dup2(STDERR_FILENO, STDOUT_FILENO);
1547
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1548
if(ret == -1){
1549
perror_plus("setenv");
1550
_exit(EX_OSERR);
1551
}
1552
ret = setenv("DEVICE", interface, 1);
1553
if(ret == -1){
1554
perror_plus("setenv");
1555
_exit(EX_OSERR);
1556
}
1557
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1558
if(ret == -1){
1559
perror_plus("setenv");
1560
_exit(EX_OSERR);
1561
}
1562
ret = setenv("MODE", mode, 1);
1563
if(ret == -1){
1564
perror_plus("setenv");
1565
_exit(EX_OSERR);
1566
}
1567
char *delaystring;
1568
ret = asprintf(&delaystring, "%f", delay);
1569
if(ret == -1){
1570
perror_plus("asprintf");
1571
_exit(EX_OSERR);
1572
}
1573
ret = setenv("DELAY", delaystring, 1);
1574
if(ret == -1){
1575
free(delaystring);
1576
perror_plus("setenv");
1577
_exit(EX_OSERR);
1578
}
1733
1579
free(delaystring);
1734
perror_plus("setenv");
1735
_exit(EX_OSERR);
1736
}
1737
free(delaystring);
1738
if(connect_to != NULL){
1739
ret = setenv("CONNECT", connect_to, 1);
1740
if(ret == -1){
1741
perror_plus("setenv");
1742
_exit(EX_OSERR);
1743
}
1744
}
1745
int hook_fd = openat(hookdir_fd, direntry->d_name, O_RDONLY);
1746
if(hook_fd == -1){
1747
perror_plus("openat");
1748
_exit(EXIT_FAILURE);
1749
}
1750
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1751
perror_plus("close");
1752
_exit(EXIT_FAILURE);
1753
}
1754
if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },
1755
environ) == -1){
1756
perror_plus("fexecve");
1757
_exit(EXIT_FAILURE);
1758
}
1759
} else {
1760
if(hook_pid == -1){
1761
perror_plus("fork");
1762
free(direntry);
1763
continue;
1764
}
1765
int status;
1766
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1767
perror_plus("waitpid");
1768
free(direntry);
1769
continue;
1770
}
1771
if(WIFEXITED(status)){
1772
if(WEXITSTATUS(status) != 0){
1773
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1774
" with status %d\n", direntry->d_name,
1775
WEXITSTATUS(status));
1776
free(direntry);
1777
continue;
1778
}
1779
} else if(WIFSIGNALED(status)){
1780
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1781
" signal %d\n", direntry->d_name,
1782
WTERMSIG(status));
1783
free(direntry);
1784
continue;
1580
if(connect_to != NULL){
1581
ret = setenv("CONNECT", connect_to, 1);
1582
if(ret == -1){
1583
perror_plus("setenv");
1584
_exit(EX_OSERR);
1585
}
1586
}
1587
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1588
perror_plus("execl");
1589
_exit(EXIT_FAILURE);
1590
}
1785
1591
} else {
1786
fprintf_plus(stderr, "Warning: network hook \"%s\""
1787
" crashed\n", direntry->d_name);
1788
free(direntry);
1789
continue;
1790
}
1791
}
1792
if(debug){
1793
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1794
direntry->d_name);
1795
}
1796
free(direntry);
1797
}
1798
free(direntries);
1799
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1800
perror_plus("close");
1801
} else {
1802
hookdir_fd = -1;
1803
}
1804
close(devnull);
1592
int status;
1593
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1594
perror_plus("waitpid");
1595
free(fullname);
1596
continue;
1597
}
1598
if(WIFEXITED(status)){
1599
if(WEXITSTATUS(status) != 0){
1600
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1601
" with status %d\n", direntry->d_name,
1602
WEXITSTATUS(status));
1603
free(fullname);
1604
continue;
1605
}
1606
} else if(WIFSIGNALED(status)){
1607
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1608
" signal %d\n", direntry->d_name,
1609
WTERMSIG(status));
1610
free(fullname);
1611
continue;
1612
} else {
1613
fprintf_plus(stderr, "Warning: network hook \"%s\""
1614
" crashed\n", direntry->d_name);
1615
free(fullname);
1616
continue;
1617
}
1618
}
1619
free(fullname);
1620
if(debug){
1621
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1622
direntry->d_name);
1623
}
1624
}
1625
close(devnull);
1626
}
1627
return true;
1805
1628
}
1806
1629
1807
__attribute__((nonnull, warn_unused_result))
1808
1630
error_t bring_up_interface(const char *const interface,
1809
1631
const float delay){
1632
int sd = -1;
1810
1633
error_t old_errno = errno;
1811
int ret;
1634
error_t ret_errno = 0;
1635
int ret, ret_setflags;
1812
1636
struct ifreq network;
1813
1637
unsigned int if_index = if_nametoindex(interface);
1814
1638
if(if_index == 0){
1823
1647
}
1824
1648
1825
1649
if(not interface_is_up(interface)){
1826
error_t ret_errno = 0, ioctl_errno = 0;
1827
if(not get_flags(interface, &network)){
1650
if(not get_flags(interface, &network) and debug){
1828
1651
ret_errno = errno;
1829
1652
fprintf_plus(stderr, "Failed to get flags for interface "
1830
1653
"\"%s\"\n", interface);
1831
errno = old_errno;
1832
1654
return ret_errno;
1833
1655
}
1834
network.ifr_flags |= IFF_UP; /* set flag */
1656
network.ifr_flags |= IFF_UP;
1835
1657
1836
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1837
if(sd == -1){
1658
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1659
if(sd < 0){
1838
1660
ret_errno = errno;
1839
1661
perror_plus("socket");
1840
1662
errno = old_errno;
1841
1663
return ret_errno;
1842
1664
}
1843
1665
1844
1666
if(quit_now){
1845
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1846
if(ret == -1){
1847
perror_plus("close");
1848
}
1667
close(sd);
1849
1668
errno = old_errno;
1850
1669
return EINTR;
1851
1670
}
1855
1674
interface);
1856
1675
}
1857
1676
1858
/* Raise privileges */
1859
ret_errno = raise_privileges();
1860
if(ret_errno != 0){
1861
errno = ret_errno;
1862
perror_plus("Failed to raise privileges");
1863
}
1677
/* Raise priviliges */
1678
raise_privileges();
1864
1679
1865
1680
#ifdef __linux__
1866
int ret_linux;
1867
bool restore_loglevel = false;
1868
if(ret_errno == 0){
1869
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1870
messages about the network interface to mess up the prompt */
1871
ret_linux = klogctl(8, NULL, 5);
1872
if(ret_linux == -1){
1873
perror_plus("klogctl");
1874
} else {
1875
restore_loglevel = true;
1876
}
1681
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1682
messages about the network interface to mess up the prompt */
1683
int ret_linux = klogctl(8, NULL, 5);
1684
bool restore_loglevel = true;
1685
if(ret_linux == -1){
1686
restore_loglevel = false;
1687
perror_plus("klogctl");
1877
1688
}
1878
1689
#endif /* __linux__ */
1879
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1880
ioctl_errno = errno;
1690
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1691
ret_errno = errno;
1881
1692
#ifdef __linux__
1882
1693
if(restore_loglevel){
1883
1694
ret_linux = klogctl(7, NULL, 0);
1887
1698
}
1888
1699
#endif /* __linux__ */
1889
1700
1890
/* If raise_privileges() succeeded above */
1891
if(ret_errno == 0){
1892
/* Lower privileges */
1893
ret_errno = lower_privileges();
1894
if(ret_errno != 0){
1895
errno = ret_errno;
1896
perror_plus("Failed to lower privileges");
1897
}
1898
}
1701
/* Lower privileges */
1702
lower_privileges();
1899
1703
1900
1704
/* Close the socket */
1901
1705
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1904
1708
}
1905
1709
1906
1710
if(ret_setflags == -1){
1907
errno = ioctl_errno;
1711
errno = ret_errno;
1908
1712
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1909
1713
errno = old_errno;
1910
return ioctl_errno;
1714
return ret_errno;
1911
1715
}
1912
1716
} else if(debug){
1913
1717
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1931
1735
return 0;
1932
1736
}
1933
1737
1934
__attribute__((nonnull, warn_unused_result))
1935
1738
error_t take_down_interface(const char *const interface){
1936
1739
error_t old_errno = errno;
1937
1740
struct ifreq network;
1942
1745
return ENXIO;
1943
1746
}
1944
1747
if(interface_is_up(interface)){
1945
error_t ret_errno = 0, ioctl_errno = 0;
1748
error_t ret_errno = 0;
1946
1749
if(not get_flags(interface, &network) and debug){
1947
1750
ret_errno = errno;
1948
1751
fprintf_plus(stderr, "Failed to get flags for interface "
1949
1752
"\"%s\"\n", interface);
1950
errno = old_errno;
1951
1753
return ret_errno;
1952
1754
}
1953
1755
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1954
1756
1955
1757
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1956
if(sd == -1){
1758
if(sd < 0){
1957
1759
ret_errno = errno;
1958
1760
perror_plus("socket");
1959
1761
errno = old_errno;
1965
1767
interface);
1966
1768
}
1967
1769
1968
/* Raise privileges */
1969
ret_errno = raise_privileges();
1970
if(ret_errno != 0){
1971
errno = ret_errno;
1972
perror_plus("Failed to raise privileges");
1973
}
1770
/* Raise priviliges */
1771
raise_privileges();
1974
1772
1975
1773
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1976
ioctl_errno = errno;
1774
ret_errno = errno;
1977
1775
1978
/* If raise_privileges() succeeded above */
1979
if(ret_errno == 0){
1980
/* Lower privileges */
1981
ret_errno = lower_privileges();
1982
if(ret_errno != 0){
1983
errno = ret_errno;
1984
perror_plus("Failed to lower privileges");
1985
}
1986
}
1776
/* Lower privileges */
1777
lower_privileges();
1987
1778
1988
1779
/* Close the socket */
1989
1780
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
1992
1783
}
1993
1784
1994
1785
if(ret_setflags == -1){
1995
errno = ioctl_errno;
1786
errno = ret_errno;
1996
1787
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1997
1788
errno = old_errno;
1998
return ioctl_errno;
1789
return ret_errno;
1999
1790
}
2000
1791
} else if(debug){
2001
1792
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
2007
1798
}
2008
1799
2009
1800
int main(int argc, char *argv[]){
2010
mandos_context mc = { .server = NULL, .dh_bits = 0,
1801
mandos_context mc = { .server = NULL, .dh_bits = 1024,
2011
1802
.priority = "SECURE256:!CTYPE-X.509:"
2012
"+CTYPE-OPENPGP:!RSA", .current_server = NULL,
1803
"+CTYPE-OPENPGP", .current_server = NULL,
2013
1804
.interfaces = NULL, .interfaces_size = 0 };
2014
1805
AvahiSServiceBrowser *sb = NULL;
2015
1806
error_t ret_errno;
2019
1810
int exitcode = EXIT_SUCCESS;
2020
1811
char *interfaces_to_take_down = NULL;
2021
1812
size_t interfaces_to_take_down_size = 0;
2022
char run_tempdir[] = "/run/tmp/mandosXXXXXX";
2023
char old_tempdir[] = "/tmp/mandosXXXXXX";
2024
char *tempdir = NULL;
1813
char tempdir[] = "/tmp/mandosXXXXXX";
1814
bool tempdir_created = false;
2025
1815
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
2026
1816
const char *seckey = PATHDIR "/" SECKEY;
2027
1817
const char *pubkey = PATHDIR "/" PUBKEY;
2209
1999
/* Work around Debian bug #633582:
2210
2000
<http://bugs.debian.org/633582> */
2211
2001
2212
/* Re-raise privileges */
2213
ret_errno = raise_privileges();
2214
if(ret_errno != 0){
2215
errno = ret_errno;
2216
perror_plus("Failed to raise privileges");
2217
} else {
2002
/* Re-raise priviliges */
2003
if(raise_privileges() == 0){
2218
2004
struct stat st;
2219
2005
2220
2006
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2260
2046
}
2261
2047
2262
2048
/* Lower privileges */
2263
ret_errno = lower_privileges();
2264
if(ret_errno != 0){
2265
errno = ret_errno;
2266
perror_plus("Failed to lower privileges");
2267
}
2049
lower_privileges();
2268
2050
}
2269
2051
}
2270
2052
2296
2078
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2297
2079
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2298
2080
}
2299
run_network_hooks("start", interfaces_hooks != NULL ?
2300
interfaces_hooks : "", delay);
2081
if(not run_network_hooks("start", interfaces_hooks != NULL ?
2082
interfaces_hooks : "", delay)){
2083
goto end;
2084
}
2301
2085
}
2302
2086
2303
2087
if(not debug){
2381
2165
2382
2166
/* If no interfaces were specified, make a list */
2383
2167
if(mc.interfaces == NULL){
2384
struct dirent **direntries = NULL;
2168
struct dirent **direntries;
2385
2169
/* Look for any good interfaces */
2386
2170
ret = scandir(sys_class_net, &direntries, good_interface,
2387
2171
alphasort);
2393
2177
if(ret_errno != 0){
2394
2178
errno = ret_errno;
2395
2179
perror_plus("argz_add");
2396
free(direntries[i]);
2397
2180
continue;
2398
2181
}
2399
2182
if(debug){
2400
2183
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2401
2184
direntries[i]->d_name);
2402
2185
}
2403
free(direntries[i]);
2404
2186
}
2405
2187
free(direntries);
2406
2188
} else {
2407
if(ret == 0){
2408
free(direntries);
2409
}
2189
free(direntries);
2410
2190
fprintf_plus(stderr, "Could not find a network interface\n");
2411
2191
exitcode = EXIT_FAILURE;
2412
2192
goto end;
2435
2215
break;
2436
2216
}
2437
2217
bool interface_was_up = interface_is_up(interface);
2438
errno = bring_up_interface(interface, delay);
2218
ret = bring_up_interface(interface, delay);
2439
2219
if(not interface_was_up){
2440
if(errno != 0){
2220
if(ret != 0){
2221
errno = ret;
2441
2222
perror_plus("Failed to bring up interface");
2442
2223
} else {
2443
errno = argz_add(&interfaces_to_take_down,
2444
&interfaces_to_take_down_size,
2445
interface);
2446
if(errno != 0){
2224
ret_errno = argz_add(&interfaces_to_take_down,
2225
&interfaces_to_take_down_size,
2226
interface);
2227
if(ret_errno != 0){
2228
errno = ret_errno;
2447
2229
perror_plus("argz_add");
2448
2230
}
2449
2231
}
2480
2262
goto end;
2481
2263
}
2482
2264
2483
/* Try /run/tmp before /tmp */
2484
tempdir = mkdtemp(run_tempdir);
2485
if(tempdir == NULL and errno == ENOENT){
2486
if(debug){
2487
fprintf_plus(stderr, "Tempdir %s did not work, trying %s\n",
2488
run_tempdir, old_tempdir);
2489
}
2490
tempdir = mkdtemp(old_tempdir);
2491
}
2492
if(tempdir == NULL){
2265
if(mkdtemp(tempdir) == NULL){
2493
2266
perror_plus("mkdtemp");
2494
2267
goto end;
2495
2268
}
2269
tempdir_created = true;
2496
2270
2497
2271
if(quit_now){
2498
2272
goto end;
2573
2347
sleep((unsigned int)retry_interval);
2574
2348
}
2575
2349
2576
if(not quit_now){
2350
if (not quit_now){
2577
2351
exitcode = EXIT_SUCCESS;
2578
2352
}
2579
2353
2634
2408
if(debug){
2635
2409
fprintf_plus(stderr, "Starting Avahi loop search\n");
2636
2410
}
2637
2411
2638
2412
ret = avahi_loop_with_timeout(simple_poll,
2639
2413
(int)(retry_interval * 1000), &mc);
2640
2414
if(debug){
2676
2450
mc.current_server->prev->next = NULL;
2677
2451
while(mc.current_server != NULL){
2678
2452
server *next = mc.current_server->next;
2679
#ifdef __GNUC__
2680
#pragma GCC diagnostic push
2681
#pragma GCC diagnostic ignored "-Wcast-qual"
2682
#endif
2683
free((char *)(mc.current_server->ip));
2684
#ifdef __GNUC__
2685
#pragma GCC diagnostic pop
2686
#endif
2687
2453
free(mc.current_server);
2688
2454
mc.current_server = next;
2689
2455
}
2690
2456
}
2691
2457
2692
/* Re-raise privileges */
2458
/* Re-raise priviliges */
2693
2459
{
2694
ret_errno = raise_privileges();
2695
if(ret_errno != 0){
2696
errno = ret_errno;
2697
perror_plus("Failed to raise privileges");
2698
} else {
2699
2700
/* Run network hooks */
2701
run_network_hooks("stop", interfaces_hooks != NULL ?
2702
interfaces_hooks : "", delay);
2703
2704
/* Take down the network interfaces which were brought up */
2705
{
2706
char *interface = NULL;
2707
while((interface=argz_next(interfaces_to_take_down,
2708
interfaces_to_take_down_size,
2709
interface))){
2710
ret_errno = take_down_interface(interface);
2711
if(ret_errno != 0){
2712
errno = ret_errno;
2713
perror_plus("Failed to take down interface");
2714
}
2715
}
2716
if(debug and (interfaces_to_take_down == NULL)){
2717
fprintf_plus(stderr, "No interfaces needed to be taken"
2718
" down\n");
2719
}
2720
}
2721
}
2722
2723
ret_errno = lower_privileges_permanently();
2724
if(ret_errno != 0){
2725
errno = ret_errno;
2726
perror_plus("Failed to lower privileges permanently");
2727
}
2460
raise_privileges();
2461
2462
/* Run network hooks */
2463
run_network_hooks("stop", interfaces_hooks != NULL ?
2464
interfaces_hooks : "", delay);
2465
2466
/* Take down the network interfaces which were brought up */
2467
{
2468
char *interface = NULL;
2469
while((interface=argz_next(interfaces_to_take_down,
2470
interfaces_to_take_down_size,
2471
interface))){
2472
ret_errno = take_down_interface(interface);
2473
if(ret_errno != 0){
2474
errno = ret_errno;
2475
perror_plus("Failed to take down interface");
2476
}
2477
}
2478
if(debug and (interfaces_to_take_down == NULL)){
2479
fprintf_plus(stderr, "No interfaces needed to be taken"
2480
" down\n");
2481
}
2482
}
2483
2484
lower_privileges_permanently();
2728
2485
}
2729
2486
2730
2487
free(interfaces_to_take_down);
2731
2488
free(interfaces_hooks);
2732
2489
2733
2490
/* Removes the GPGME temp directory and all files inside */
2734
if(tempdir != NULL){
2491
if(tempdir_created){
2735
2492
struct dirent **direntries = NULL;
2736
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY |
2737
O_NOFOLLOW));
2738
if(tempdir_fd == -1){
2739
perror_plus("open");
2740
} else {
2741
#ifdef __GLIBC__
2742
#if __GLIBC_PREREQ(2, 15)
2743
int numentries = scandirat(tempdir_fd, ".", &direntries,
2744
notdotentries, alphasort);
2745
#else /* not __GLIBC_PREREQ(2, 15) */
2746
int numentries = scandir(tempdir, &direntries, notdotentries,
2747
alphasort);
2748
#endif /* not __GLIBC_PREREQ(2, 15) */
2749
#else /* not __GLIBC__ */
2750
int numentries = scandir(tempdir, &direntries, notdotentries,
2751
alphasort);
2752
#endif /* not __GLIBC__ */
2753
if(numentries >= 0){
2754
for(int i = 0; i < numentries; i++){
2755
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
2756
if(ret == -1){
2757
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
2758
" \"%s\", 0): %s\n", tempdir,
2759
direntries[i]->d_name, strerror(errno));
2760
}
2761
free(direntries[i]);
2762
}
2763
2764
/* need to clean even if 0 because man page doesn't specify */
2765
free(direntries);
2766
if(numentries == -1){
2767
perror_plus("scandir");
2768
}
2769
ret = rmdir(tempdir);
2770
if(ret == -1 and errno != ENOENT){
2771
perror_plus("rmdir");
2772
}
2493
struct dirent *direntry = NULL;
2494
int numentries = scandir(tempdir, &direntries, notdotentries,
2495
alphasort);
2496
if (numentries > 0){
2497
for(int i = 0; i < numentries; i++){
2498
direntry = direntries[i];
2499
char *fullname = NULL;
2500
ret = asprintf(&fullname, "%s/%s", tempdir,
2501
direntry->d_name);
2502
if(ret < 0){
2503
perror_plus("asprintf");
2504
continue;
2505
}
2506
ret = remove(fullname);
2507
if(ret == -1){
2508
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2509
strerror(errno));
2510
}
2511
free(fullname);
2773
2512
}
2774
TEMP_FAILURE_RETRY(close(tempdir_fd));
2513
}
2514
2515
/* need to clean even if 0 because man page doesn't specify */
2516
free(direntries);
2517
if (numentries == -1){
2518
perror_plus("scandir");
2519
}
2520
ret = rmdir(tempdir);
2521
if(ret == -1 and errno != ENOENT){
2522
perror_plus("rmdir");
2775
2523
}
2776
2524
}
2777
2525
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0