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- Committer: Teddy Hogeborn
- Date: 2014-07-25 23:42:53 UTC
- mto: This revision was merged to the branch mainline in revision 724.
- Revision ID: teddy@recompile.se-20140725234253-m11fdsv01fetbk51
Use the .major attribute on sys.version_info instead of using "[0]".
The components of sys.version_info can now be accessed by attributes
instead of by numerical index, so do that.
* mandos-ctl: Get major version by using "sys.version_info.major".
* mandos-monitor: - '' -
The components of sys.version_info can now be accessed by attributes
instead of by numerical index, so do that.
* mandos-ctl: Get major version by using "sys.version_info.major".
* mandos-monitor: - '' -
- files added:
- debian/upstream
- files modified:
- INSTALL
added
removed
plugins.d/mandos-client.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008-2012 Teddy Hogeborn
13
* Copyright © 2008-2012 Björn Påhlsson
12
* Copyright © 2008-2014 Teddy Hogeborn
13
* Copyright © 2008-2014 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
35
#endif /* not _LARGEFILE_SOURCE */
36
36
#ifndef _FILE_OFFSET_BITS
37
37
#define _FILE_OFFSET_BITS 64
38
#endif
38
#endif /* not _FILE_OFFSET_BITS */
39
39
40
40
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
41
41
42
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
stdout, ferror(), remove() */
43
stdout, ferror() */
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(),
55
55
opendir(), DIR */
56
56
#include <sys/stat.h> /* open(), S_ISREG */
57
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
inet_pton(), connect() */
59
#include <fcntl.h> /* open() */
58
inet_pton(), connect(),
59
getnameinfo() */
60
#include <fcntl.h> /* open(), unlinkat() */
60
61
#include <dirent.h> /* opendir(), struct dirent, readdir()
61
62
*/
62
63
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
72
73
*/
73
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
75
getuid(), getgid(), seteuid(),
75
setgid(), pause(), _exit() */
76
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
76
setgid(), pause(), _exit(),
77
unlinkat() */
78
#include <arpa/inet.h> /* inet_pton(), htons() */
77
79
#include <iso646.h> /* not, or, and */
78
80
#include <argp.h> /* struct argp_option, error_t, struct
79
81
argp_state, struct argp,
91
93
argz_delete(), argz_append(),
92
94
argz_stringify(), argz_add(),
93
95
argz_count() */
96
#include <netdb.h> /* getnameinfo(), NI_NUMERICHOST,
97
EAI_SYSTEM, gai_strerror() */
94
98
95
99
#ifdef __linux__
96
100
#include <sys/klog.h> /* klogctl() */
138
142
static const char sys_class_net[] = "/sys/class/net";
139
143
char *connect_to = NULL;
140
144
const char *hookdir = HOOKDIR;
145
int hookdir_fd = -1;
141
146
uid_t uid = 65534;
142
147
gid_t gid = 65534;
143
148
180
185
perror(print_text);
181
186
}
182
187
183
__attribute__((format (gnu_printf, 2, 3)))
188
__attribute__((format (gnu_printf, 2, 3), nonnull))
184
189
int fprintf_plus(FILE *stream, const char *format, ...){
185
190
va_list ap;
186
191
va_start (ap, format);
187
192
188
193
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
189
194
program_invocation_short_name));
190
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
195
return (int)TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
191
196
}
192
197
193
198
/*
195
200
* bytes. "buffer_capacity" is how much is currently allocated,
196
201
* "buffer_length" is how much is already used.
197
202
*/
203
__attribute__((nonnull, warn_unused_result))
198
204
size_t incbuffer(char **buffer, size_t buffer_length,
199
205
size_t buffer_capacity){
200
206
if(buffer_length + BUFFER_SIZE > buffer_capacity){
201
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
202
if(buffer == NULL){
207
char *new_buf = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
208
if(new_buf == NULL){
209
int old_errno = errno;
210
free(*buffer);
211
errno = old_errno;
212
*buffer = NULL;
203
213
return 0;
204
214
}
215
*buffer = new_buf;
205
216
buffer_capacity += BUFFER_SIZE;
206
217
}
207
218
return buffer_capacity;
208
219
}
209
220
210
221
/* Add server to set of servers to retry periodically */
222
__attribute__((nonnull, warn_unused_result))
211
223
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
212
224
int af, server **current_server){
213
225
int ret;
222
234
.af = af };
223
235
if(new_server->ip == NULL){
224
236
perror_plus("strdup");
237
free(new_server);
238
return false;
239
}
240
ret = clock_gettime(CLOCK_MONOTONIC, &(new_server->last_seen));
241
if(ret == -1){
242
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);
225
252
return false;
226
253
}
227
254
/* Special case of first server */
229
256
new_server->next = new_server;
230
257
new_server->prev = new_server;
231
258
*current_server = new_server;
232
/* Place the new server last in the list */
233
259
} else {
260
/* Place the new server last in the list */
234
261
new_server->next = *current_server;
235
262
new_server->prev = (*current_server)->prev;
236
263
new_server->prev->next = new_server;
237
264
(*current_server)->prev = new_server;
238
265
}
239
ret = clock_gettime(CLOCK_MONOTONIC, &(*current_server)->last_seen);
240
if(ret == -1){
241
perror_plus("clock_gettime");
242
return false;
243
}
244
266
return true;
245
267
}
246
268
247
269
/*
248
270
* Initialize GPGME.
249
271
*/
250
static bool init_gpgme(const char *seckey, const char *pubkey,
251
const char *tempdir, mandos_context *mc){
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){
252
277
gpgme_error_t rc;
253
278
gpgme_engine_info_t engine_info;
254
279
255
280
/*
256
281
* Helper function to insert pub and seckey to the engine keyring.
257
282
*/
258
bool import_key(const char *filename){
283
bool import_key(const char * const filename){
259
284
int ret;
260
285
int fd;
261
286
gpgme_data_t pgp_data;
342
367
* Decrypt OpenPGP data.
343
368
* Returns -1 on error
344
369
*/
370
__attribute__((nonnull, warn_unused_result))
345
371
static ssize_t pgp_packet_decrypt(const char *cryptotext,
346
372
size_t crypto_size,
347
373
char **plaintext,
467
493
return plaintext_length;
468
494
}
469
495
470
static const char * safer_gnutls_strerror(int value){
496
__attribute__((warn_unused_result))
497
static const char *safer_gnutls_strerror(int value){
471
498
const char *ret = gnutls_strerror(value);
472
499
if(ret == NULL)
473
500
ret = "(unknown)";
475
502
}
476
503
477
504
/* GnuTLS log function callback */
505
__attribute__((nonnull))
478
506
static void debuggnutls(__attribute__((unused)) int level,
479
507
const char* string){
480
508
fprintf_plus(stderr, "GnuTLS: %s", string);
481
509
}
482
510
511
__attribute__((nonnull, warn_unused_result))
483
512
static int init_gnutls_global(const char *pubkeyfilename,
484
513
const char *seckeyfilename,
485
514
mandos_context *mc){
559
588
return -1;
560
589
}
561
590
591
__attribute__((nonnull, warn_unused_result))
562
592
static int init_gnutls_session(gnutls_session_t *session,
563
593
mandos_context *mc){
564
594
int ret;
621
651
__attribute__((unused)) const char *txt){}
622
652
623
653
/* Called when a Mandos server is found */
654
__attribute__((nonnull, warn_unused_result))
624
655
static int start_mandos_communication(const char *ip, in_port_t port,
625
656
AvahiIfIndex if_index,
626
657
int af, mandos_context *mc){
627
658
int ret, tcp_sd = -1;
628
659
ssize_t sret;
629
union {
630
struct sockaddr_in in;
631
struct sockaddr_in6 in6;
632
} to;
660
struct sockaddr_storage to;
633
661
char *buffer = NULL;
634
662
char *decrypted_buffer = NULL;
635
663
size_t buffer_length = 0;
659
687
return -1;
660
688
}
661
689
690
/* If the interface is specified and we have a list of interfaces */
662
691
if(if_index != AVAHI_IF_UNSPEC and mc->interfaces != NULL){
663
692
/* Check if the interface is one of the interfaces we are using */
664
693
bool match = false;
673
702
}
674
703
}
675
704
if(not match){
705
/* This interface does not match any in the list, so we don't
706
connect to the server */
676
707
if(debug){
677
708
char interface[IF_NAMESIZE];
678
709
if(if_indextoname((unsigned int)if_index, interface) == NULL){
713
744
714
745
memset(&to, 0, sizeof(to));
715
746
if(af == AF_INET6){
716
to.in6.sin6_family = (sa_family_t)af;
717
ret = inet_pton(af, ip, &to.in6.sin6_addr);
747
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
748
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
718
749
} else { /* IPv4 */
719
to.in.sin_family = (sa_family_t)af;
720
ret = inet_pton(af, ip, &to.in.sin_addr);
750
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
751
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
721
752
}
722
753
if(ret < 0 ){
723
754
int e = errno;
732
763
goto mandos_end;
733
764
}
734
765
if(af == AF_INET6){
735
to.in6.sin6_port = htons(port);
736
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
737
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
738
-Wunreachable-code*/
766
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
767
if(IN6_IS_ADDR_LINKLOCAL
768
(&((struct sockaddr_in6 *)&to)->sin6_addr)){
739
769
if(if_index == AVAHI_IF_UNSPEC){
740
770
fprintf_plus(stderr, "An IPv6 link-local address is"
741
771
" incomplete without a network interface\n");
743
773
goto mandos_end;
744
774
}
745
775
/* Set the network interface number as scope */
746
to.in6.sin6_scope_id = (uint32_t)if_index;
776
((struct sockaddr_in6 *)&to)->sin6_scope_id = (uint32_t)if_index;
747
777
}
748
778
} else {
749
to.in.sin_port = htons(port); /* Spurious warnings from
750
-Wconversion and
751
-Wunreachable-code */
779
((struct sockaddr_in *)&to)->sin_port = htons(port);
752
780
}
753
781
754
782
if(quit_now){
771
799
}
772
800
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
773
801
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
774
const char *pcret;
775
802
if(af == AF_INET6){
776
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
777
sizeof(addrstr));
803
ret = getnameinfo((struct sockaddr *)&to,
804
sizeof(struct sockaddr_in6),
805
addrstr, sizeof(addrstr), NULL, 0,
806
NI_NUMERICHOST);
778
807
} else {
779
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
780
sizeof(addrstr));
808
ret = getnameinfo((struct sockaddr *)&to,
809
sizeof(struct sockaddr_in),
810
addrstr, sizeof(addrstr), NULL, 0,
811
NI_NUMERICHOST);
781
812
}
782
if(pcret == NULL){
783
perror_plus("inet_ntop");
784
} else {
785
if(strcmp(addrstr, ip) != 0){
786
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
787
}
813
if(ret == EAI_SYSTEM){
814
perror_plus("getnameinfo");
815
} else if(ret != 0) {
816
fprintf_plus(stderr, "getnameinfo: %s", gai_strerror(ret));
817
} else if(strcmp(addrstr, ip) != 0){
818
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
788
819
}
789
820
}
790
821
794
825
}
795
826
796
827
if(af == AF_INET6){
797
ret = connect(tcp_sd, &to.in6, sizeof(to));
828
ret = connect(tcp_sd, (struct sockaddr *)&to,
829
sizeof(struct sockaddr_in6));
798
830
} else {
799
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
831
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
832
sizeof(struct sockaddr_in));
800
833
}
801
834
if(ret < 0){
802
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
835
if((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
803
836
int e = errno;
804
837
perror_plus("connect");
805
838
errno = e;
1020
1053
return retval;
1021
1054
}
1022
1055
1056
__attribute__((nonnull))
1023
1057
static void resolve_callback(AvahiSServiceResolver *r,
1024
1058
AvahiIfIndex interface,
1025
1059
AvahiProtocol proto,
1033
1067
AVAHI_GCC_UNUSED AvahiStringList *txt,
1034
1068
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1035
1069
flags,
1036
void* mc){
1070
void *mc){
1037
1071
if(r == NULL){
1038
1072
return;
1039
1073
}
1042
1076
timed out */
1043
1077
1044
1078
if(quit_now){
1079
avahi_s_service_resolver_free(r);
1045
1080
return;
1046
1081
}
1047
1082
1092
1127
const char *domain,
1093
1128
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1094
1129
flags,
1095
void* mc){
1130
void *mc){
1096
1131
if(b == NULL){
1097
1132
return;
1098
1133
}
1158
1193
errno = old_errno;
1159
1194
}
1160
1195
1196
__attribute__((nonnull, warn_unused_result))
1161
1197
bool get_flags(const char *ifname, struct ifreq *ifr){
1162
1198
int ret;
1163
1199
error_t ret_errno;
1182
1218
return true;
1183
1219
}
1184
1220
1221
__attribute__((nonnull, warn_unused_result))
1185
1222
bool good_flags(const char *ifname, const struct ifreq *ifr){
1186
1223
1187
1224
/* Reject the loopback device */
1229
1266
* corresponds to an acceptable network device.
1230
1267
* (This function is passed to scandir(3) as a filter function.)
1231
1268
*/
1269
__attribute__((nonnull, warn_unused_result))
1232
1270
int good_interface(const struct dirent *if_entry){
1233
1271
if(if_entry->d_name[0] == '.'){
1234
1272
return 0;
1252
1290
/*
1253
1291
* This function determines if a network interface is up.
1254
1292
*/
1293
__attribute__((nonnull, warn_unused_result))
1255
1294
bool interface_is_up(const char *interface){
1256
1295
struct ifreq ifr;
1257
1296
if(not get_flags(interface, &ifr)){
1268
1307
/*
1269
1308
* This function determines if a network interface is running
1270
1309
*/
1310
__attribute__((nonnull, warn_unused_result))
1271
1311
bool interface_is_running(const char *interface){
1272
1312
struct ifreq ifr;
1273
1313
if(not get_flags(interface, &ifr)){
1281
1321
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1282
1322
}
1283
1323
1324
__attribute__((nonnull, pure, warn_unused_result))
1284
1325
int notdotentries(const struct dirent *direntry){
1285
1326
/* Skip "." and ".." */
1286
1327
if(direntry->d_name[0] == '.'
1293
1334
}
1294
1335
1295
1336
/* Is this directory entry a runnable program? */
1337
__attribute__((nonnull, warn_unused_result))
1296
1338
int runnable_hook(const struct dirent *direntry){
1297
1339
int ret;
1298
1340
size_t sret;
1306
1348
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1307
1349
"abcdefghijklmnopqrstuvwxyz"
1308
1350
"0123456789"
1309
"_-");
1351
"_.-");
1310
1352
if((direntry->d_name)[sret] != '\0'){
1311
1353
/* Contains non-allowed characters */
1312
1354
if(debug){
1316
1358
return 0;
1317
1359
}
1318
1360
1319
char *fullname = NULL;
1320
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1321
if(ret < 0){
1322
perror_plus("asprintf");
1323
return 0;
1324
}
1325
1326
ret = stat(fullname, &st);
1361
ret = fstatat(hookdir_fd, direntry->d_name, &st, 0);
1327
1362
if(ret == -1){
1328
1363
if(debug){
1329
1364
perror_plus("Could not stat hook");
1353
1388
return 1;
1354
1389
}
1355
1390
1391
__attribute__((nonnull, warn_unused_result))
1356
1392
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1357
1393
mandos_context *mc){
1358
1394
int ret;
1362
1398
1363
1399
while(true){
1364
1400
if(mc->current_server == NULL){
1365
if (debug){
1401
if(debug){
1366
1402
fprintf_plus(stderr, "Wait until first server is found."
1367
1403
" No timeout!\n");
1368
1404
}
1369
1405
ret = avahi_simple_poll_iterate(s, -1);
1370
1406
} else {
1371
if (debug){
1407
if(debug){
1372
1408
fprintf_plus(stderr, "Check current_server if we should run"
1373
1409
" it, or wait\n");
1374
1410
}
1391
1427
- ((intmax_t)waited_time.tv_sec * 1000))
1392
1428
- ((intmax_t)waited_time.tv_nsec / 1000000));
1393
1429
1394
if (debug){
1430
if(debug){
1395
1431
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1396
1432
block_time);
1397
1433
}
1419
1455
ret = avahi_simple_poll_iterate(s, (int)block_time);
1420
1456
}
1421
1457
if(ret != 0){
1422
if (ret > 0 or errno != EINTR){
1458
if(ret > 0 or errno != EINTR){
1423
1459
return (ret != 1) ? ret : 0;
1424
1460
}
1425
1461
}
1427
1463
}
1428
1464
1429
1465
/* Set effective uid to 0, return errno */
1466
__attribute__((warn_unused_result))
1430
1467
error_t raise_privileges(void){
1431
1468
error_t old_errno = errno;
1432
1469
error_t ret_errno = 0;
1433
1470
if(seteuid(0) == -1){
1434
1471
ret_errno = errno;
1435
perror_plus("seteuid");
1436
1472
}
1437
1473
errno = old_errno;
1438
1474
return ret_errno;
1439
1475
}
1440
1476
1441
1477
/* Set effective and real user ID to 0. Return errno. */
1478
__attribute__((warn_unused_result))
1442
1479
error_t raise_privileges_permanently(void){
1443
1480
error_t old_errno = errno;
1444
1481
error_t ret_errno = raise_privileges();
1448
1485
}
1449
1486
if(setuid(0) == -1){
1450
1487
ret_errno = errno;
1451
perror_plus("seteuid");
1452
1488
}
1453
1489
errno = old_errno;
1454
1490
return ret_errno;
1455
1491
}
1456
1492
1457
1493
/* Set effective user ID to unprivileged saved user ID */
1494
__attribute__((warn_unused_result))
1458
1495
error_t lower_privileges(void){
1459
1496
error_t old_errno = errno;
1460
1497
error_t ret_errno = 0;
1461
1498
if(seteuid(uid) == -1){
1462
1499
ret_errno = errno;
1463
perror_plus("seteuid");
1464
1500
}
1465
1501
errno = old_errno;
1466
1502
return ret_errno;
1467
1503
}
1468
1504
1469
1505
/* Lower privileges permanently */
1506
__attribute__((warn_unused_result))
1470
1507
error_t lower_privileges_permanently(void){
1471
1508
error_t old_errno = errno;
1472
1509
error_t ret_errno = 0;
1473
1510
if(setuid(uid) == -1){
1474
1511
ret_errno = errno;
1475
perror_plus("setuid");
1476
1512
}
1477
1513
errno = old_errno;
1478
1514
return ret_errno;
1479
1515
}
1480
1516
1481
bool run_network_hooks(const char *mode, const char *interface,
1517
__attribute__((nonnull))
1518
void run_network_hooks(const char *mode, const char *interface,
1482
1519
const float delay){
1483
struct dirent **direntries;
1520
struct dirent **direntries = NULL;
1521
if(hookdir_fd == -1){
1522
hookdir_fd = open(hookdir, O_RDONLY);
1523
if(hookdir_fd == -1){
1524
if(errno == ENOENT){
1525
if(debug){
1526
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1527
" found\n", hookdir);
1528
}
1529
} else {
1530
perror_plus("open");
1531
}
1532
return;
1533
}
1534
}
1535
#ifdef __GLIBC__
1536
#if __GLIBC_PREREQ(2, 15)
1537
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1538
runnable_hook, alphasort);
1539
#else /* not __GLIBC_PREREQ(2, 15) */
1540
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1541
alphasort);
1542
#endif /* not __GLIBC_PREREQ(2, 15) */
1543
#else /* not __GLIBC__ */
1544
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1545
alphasort);
1546
#endif /* not __GLIBC__ */
1547
if(numhooks == -1){
1548
perror_plus("scandir");
1549
return;
1550
}
1484
1551
struct dirent *direntry;
1485
1552
int ret;
1486
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1487
alphasort);
1488
if(numhooks == -1){
1489
if(errno == ENOENT){
1490
if(debug){
1491
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1492
" found\n", hookdir);
1493
}
1494
} else {
1495
perror_plus("scandir");
1553
int devnull = open("/dev/null", O_RDONLY);
1554
for(int i = 0; i < numhooks; i++){
1555
direntry = direntries[i];
1556
if(debug){
1557
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1558
direntry->d_name);
1496
1559
}
1497
} else {
1498
int devnull = open("/dev/null", O_RDONLY);
1499
for(int i = 0; i < numhooks; i++){
1500
direntry = direntries[i];
1501
char *fullname = NULL;
1502
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1503
if(ret < 0){
1560
pid_t hook_pid = fork();
1561
if(hook_pid == 0){
1562
/* Child */
1563
/* Raise privileges */
1564
errno = raise_privileges_permanently();
1565
if(errno != 0){
1566
perror_plus("Failed to raise privileges");
1567
_exit(EX_NOPERM);
1568
}
1569
/* Set group */
1570
errno = 0;
1571
ret = setgid(0);
1572
if(ret == -1){
1573
perror_plus("setgid");
1574
_exit(EX_NOPERM);
1575
}
1576
/* Reset supplementary groups */
1577
errno = 0;
1578
ret = setgroups(0, NULL);
1579
if(ret == -1){
1580
perror_plus("setgroups");
1581
_exit(EX_NOPERM);
1582
}
1583
ret = dup2(devnull, STDIN_FILENO);
1584
if(ret == -1){
1585
perror_plus("dup2(devnull, STDIN_FILENO)");
1586
_exit(EX_OSERR);
1587
}
1588
ret = close(devnull);
1589
if(ret == -1){
1590
perror_plus("close");
1591
_exit(EX_OSERR);
1592
}
1593
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1594
if(ret == -1){
1595
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1596
_exit(EX_OSERR);
1597
}
1598
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1599
if(ret == -1){
1600
perror_plus("setenv");
1601
_exit(EX_OSERR);
1602
}
1603
ret = setenv("DEVICE", interface, 1);
1604
if(ret == -1){
1605
perror_plus("setenv");
1606
_exit(EX_OSERR);
1607
}
1608
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1609
if(ret == -1){
1610
perror_plus("setenv");
1611
_exit(EX_OSERR);
1612
}
1613
ret = setenv("MODE", mode, 1);
1614
if(ret == -1){
1615
perror_plus("setenv");
1616
_exit(EX_OSERR);
1617
}
1618
char *delaystring;
1619
ret = asprintf(&delaystring, "%f", (double)delay);
1620
if(ret == -1){
1504
1621
perror_plus("asprintf");
1505
continue;
1506
}
1507
if(debug){
1508
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1509
direntry->d_name);
1510
}
1511
pid_t hook_pid = fork();
1512
if(hook_pid == 0){
1513
/* Child */
1514
/* Raise privileges */
1515
raise_privileges_permanently();
1516
/* Set group */
1517
errno = 0;
1518
ret = setgid(0);
1519
if(ret == -1){
1520
perror_plus("setgid");
1521
}
1522
/* Reset supplementary groups */
1523
errno = 0;
1524
ret = setgroups(0, NULL);
1525
if(ret == -1){
1526
perror_plus("setgroups");
1527
}
1528
dup2(devnull, STDIN_FILENO);
1529
close(devnull);
1530
dup2(STDERR_FILENO, STDOUT_FILENO);
1531
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1532
if(ret == -1){
1533
perror_plus("setenv");
1534
_exit(EX_OSERR);
1535
}
1536
ret = setenv("DEVICE", interface, 1);
1537
if(ret == -1){
1538
perror_plus("setenv");
1539
_exit(EX_OSERR);
1540
}
1541
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1542
if(ret == -1){
1543
perror_plus("setenv");
1544
_exit(EX_OSERR);
1545
}
1546
ret = setenv("MODE", mode, 1);
1547
if(ret == -1){
1548
perror_plus("setenv");
1549
_exit(EX_OSERR);
1550
}
1551
char *delaystring;
1552
ret = asprintf(&delaystring, "%f", delay);
1553
if(ret == -1){
1554
perror_plus("asprintf");
1555
_exit(EX_OSERR);
1556
}
1557
ret = setenv("DELAY", delaystring, 1);
1558
if(ret == -1){
1559
free(delaystring);
1560
perror_plus("setenv");
1561
_exit(EX_OSERR);
1562
}
1622
_exit(EX_OSERR);
1623
}
1624
ret = setenv("DELAY", delaystring, 1);
1625
if(ret == -1){
1563
1626
free(delaystring);
1564
if(connect_to != NULL){
1565
ret = setenv("CONNECT", connect_to, 1);
1566
if(ret == -1){
1567
perror_plus("setenv");
1568
_exit(EX_OSERR);
1569
}
1570
}
1571
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1572
perror_plus("execl");
1573
_exit(EXIT_FAILURE);
1574
}
1627
perror_plus("setenv");
1628
_exit(EX_OSERR);
1629
}
1630
free(delaystring);
1631
if(connect_to != NULL){
1632
ret = setenv("CONNECT", connect_to, 1);
1633
if(ret == -1){
1634
perror_plus("setenv");
1635
_exit(EX_OSERR);
1636
}
1637
}
1638
int hook_fd = openat(hookdir_fd, direntry->d_name, O_RDONLY);
1639
if(hook_fd == -1){
1640
perror_plus("openat");
1641
_exit(EXIT_FAILURE);
1642
}
1643
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1644
perror_plus("close");
1645
_exit(EXIT_FAILURE);
1646
}
1647
if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },
1648
environ) == -1){
1649
perror_plus("fexecve");
1650
_exit(EXIT_FAILURE);
1651
}
1652
} else {
1653
int status;
1654
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1655
perror_plus("waitpid");
1656
free(direntry);
1657
continue;
1658
}
1659
if(WIFEXITED(status)){
1660
if(WEXITSTATUS(status) != 0){
1661
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1662
" with status %d\n", direntry->d_name,
1663
WEXITSTATUS(status));
1664
free(direntry);
1665
continue;
1666
}
1667
} else if(WIFSIGNALED(status)){
1668
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1669
" signal %d\n", direntry->d_name,
1670
WTERMSIG(status));
1671
free(direntry);
1672
continue;
1575
1673
} else {
1576
int status;
1577
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1578
perror_plus("waitpid");
1579
free(fullname);
1580
continue;
1581
}
1582
if(WIFEXITED(status)){
1583
if(WEXITSTATUS(status) != 0){
1584
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1585
" with status %d\n", direntry->d_name,
1586
WEXITSTATUS(status));
1587
free(fullname);
1588
continue;
1589
}
1590
} else if(WIFSIGNALED(status)){
1591
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1592
" signal %d\n", direntry->d_name,
1593
WTERMSIG(status));
1594
free(fullname);
1595
continue;
1596
} else {
1597
fprintf_plus(stderr, "Warning: network hook \"%s\""
1598
" crashed\n", direntry->d_name);
1599
free(fullname);
1600
continue;
1601
}
1602
}
1603
free(fullname);
1604
if(debug){
1605
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1606
direntry->d_name);
1607
}
1608
}
1609
close(devnull);
1610
}
1611
return true;
1674
fprintf_plus(stderr, "Warning: network hook \"%s\""
1675
" crashed\n", direntry->d_name);
1676
free(direntry);
1677
continue;
1678
}
1679
}
1680
if(debug){
1681
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1682
direntry->d_name);
1683
}
1684
free(direntry);
1685
}
1686
free(direntries);
1687
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1688
perror_plus("close");
1689
} else {
1690
hookdir_fd = -1;
1691
}
1692
close(devnull);
1612
1693
}
1613
1694
1695
__attribute__((nonnull, warn_unused_result))
1614
1696
error_t bring_up_interface(const char *const interface,
1615
1697
const float delay){
1616
int sd = -1;
1617
1698
error_t old_errno = errno;
1618
error_t ret_errno = 0;
1619
int ret, ret_setflags;
1699
int ret;
1620
1700
struct ifreq network;
1621
1701
unsigned int if_index = if_nametoindex(interface);
1622
1702
if(if_index == 0){
1631
1711
}
1632
1712
1633
1713
if(not interface_is_up(interface)){
1634
if(not get_flags(interface, &network) and debug){
1714
error_t ret_errno = 0, ioctl_errno = 0;
1715
if(not get_flags(interface, &network)){
1635
1716
ret_errno = errno;
1636
1717
fprintf_plus(stderr, "Failed to get flags for interface "
1637
1718
"\"%s\"\n", interface);
1719
errno = old_errno;
1638
1720
return ret_errno;
1639
1721
}
1640
network.ifr_flags |= IFF_UP;
1722
network.ifr_flags |= IFF_UP; /* set flag */
1641
1723
1642
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1643
if(sd < 0){
1724
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1725
if(sd == -1){
1644
1726
ret_errno = errno;
1645
1727
perror_plus("socket");
1646
1728
errno = old_errno;
1647
1729
return ret_errno;
1648
1730
}
1649
1731
1650
1732
if(quit_now){
1651
close(sd);
1733
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1734
if(ret == -1){
1735
perror_plus("close");
1736
}
1652
1737
errno = old_errno;
1653
1738
return EINTR;
1654
1739
}
1658
1743
interface);
1659
1744
}
1660
1745
1661
/* Raise priviliges */
1662
raise_privileges();
1746
/* Raise privileges */
1747
ret_errno = raise_privileges();
1748
if(ret_errno != 0){
1749
errno = ret_errno;
1750
perror_plus("Failed to raise privileges");
1751
}
1663
1752
1664
1753
#ifdef __linux__
1665
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1666
messages about the network interface to mess up the prompt */
1667
int ret_linux = klogctl(8, NULL, 5);
1668
bool restore_loglevel = true;
1669
if(ret_linux == -1){
1670
restore_loglevel = false;
1671
perror_plus("klogctl");
1754
int ret_linux;
1755
bool restore_loglevel = false;
1756
if(ret_errno == 0){
1757
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1758
messages about the network interface to mess up the prompt */
1759
ret_linux = klogctl(8, NULL, 5);
1760
if(ret_linux == -1){
1761
perror_plus("klogctl");
1762
} else {
1763
restore_loglevel = true;
1764
}
1672
1765
}
1673
1766
#endif /* __linux__ */
1674
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1675
ret_errno = errno;
1767
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1768
ioctl_errno = errno;
1676
1769
#ifdef __linux__
1677
1770
if(restore_loglevel){
1678
1771
ret_linux = klogctl(7, NULL, 0);
1682
1775
}
1683
1776
#endif /* __linux__ */
1684
1777
1685
/* Lower privileges */
1686
lower_privileges();
1778
/* If raise_privileges() succeeded above */
1779
if(ret_errno == 0){
1780
/* Lower privileges */
1781
ret_errno = lower_privileges();
1782
if(ret_errno != 0){
1783
errno = ret_errno;
1784
perror_plus("Failed to lower privileges");
1785
}
1786
}
1687
1787
1688
1788
/* Close the socket */
1689
1789
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1692
1792
}
1693
1793
1694
1794
if(ret_setflags == -1){
1695
errno = ret_errno;
1795
errno = ioctl_errno;
1696
1796
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1697
1797
errno = old_errno;
1698
return ret_errno;
1798
return ioctl_errno;
1699
1799
}
1700
1800
} else if(debug){
1701
1801
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1719
1819
return 0;
1720
1820
}
1721
1821
1822
__attribute__((nonnull, warn_unused_result))
1722
1823
error_t take_down_interface(const char *const interface){
1723
int sd = -1;
1724
1824
error_t old_errno = errno;
1725
error_t ret_errno = 0;
1726
int ret, ret_setflags;
1727
1825
struct ifreq network;
1728
1826
unsigned int if_index = if_nametoindex(interface);
1729
1827
if(if_index == 0){
1732
1830
return ENXIO;
1733
1831
}
1734
1832
if(interface_is_up(interface)){
1833
error_t ret_errno = 0, ioctl_errno = 0;
1735
1834
if(not get_flags(interface, &network) and debug){
1736
1835
ret_errno = errno;
1737
1836
fprintf_plus(stderr, "Failed to get flags for interface "
1738
1837
"\"%s\"\n", interface);
1838
errno = old_errno;
1739
1839
return ret_errno;
1740
1840
}
1741
1841
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1742
1842
1743
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1744
if(sd < 0){
1843
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1844
if(sd == -1){
1745
1845
ret_errno = errno;
1746
1846
perror_plus("socket");
1747
1847
errno = old_errno;
1753
1853
interface);
1754
1854
}
1755
1855
1756
/* Raise priviliges */
1757
raise_privileges();
1758
1759
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1760
ret_errno = errno;
1761
1762
/* Lower privileges */
1763
lower_privileges();
1856
/* Raise privileges */
1857
ret_errno = raise_privileges();
1858
if(ret_errno != 0){
1859
errno = ret_errno;
1860
perror_plus("Failed to raise privileges");
1861
}
1862
1863
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1864
ioctl_errno = errno;
1865
1866
/* If raise_privileges() succeeded above */
1867
if(ret_errno == 0){
1868
/* Lower privileges */
1869
ret_errno = lower_privileges();
1870
if(ret_errno != 0){
1871
errno = ret_errno;
1872
perror_plus("Failed to lower privileges");
1873
}
1874
}
1764
1875
1765
1876
/* Close the socket */
1766
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1877
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
1767
1878
if(ret == -1){
1768
1879
perror_plus("close");
1769
1880
}
1770
1881
1771
1882
if(ret_setflags == -1){
1772
errno = ret_errno;
1883
errno = ioctl_errno;
1773
1884
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1774
1885
errno = old_errno;
1775
return ret_errno;
1886
return ioctl_errno;
1776
1887
}
1777
1888
} else if(debug){
1778
1889
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1786
1897
int main(int argc, char *argv[]){
1787
1898
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1788
1899
.priority = "SECURE256:!CTYPE-X.509:"
1789
"+CTYPE-OPENPGP", .current_server = NULL,
1900
"+CTYPE-OPENPGP", .current_server = NULL,
1790
1901
.interfaces = NULL, .interfaces_size = 0 };
1791
1902
AvahiSServiceBrowser *sb = NULL;
1792
1903
error_t ret_errno;
1796
1907
int exitcode = EXIT_SUCCESS;
1797
1908
char *interfaces_to_take_down = NULL;
1798
1909
size_t interfaces_to_take_down_size = 0;
1799
char tempdir[] = "/tmp/mandosXXXXXX";
1800
bool tempdir_created = false;
1910
char run_tempdir[] = "/run/tmp/mandosXXXXXX";
1911
char old_tempdir[] = "/tmp/mandosXXXXXX";
1912
char *tempdir = NULL;
1801
1913
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1802
1914
const char *seckey = PATHDIR "/" SECKEY;
1803
1915
const char *pubkey = PATHDIR "/" PUBKEY;
1804
1916
char *interfaces_hooks = NULL;
1805
size_t interfaces_hooks_size = 0;
1806
1917
1807
1918
bool gnutls_initialized = false;
1808
1919
bool gpgme_initialized = false;
1986
2097
/* Work around Debian bug #633582:
1987
2098
<http://bugs.debian.org/633582> */
1988
2099
1989
/* Re-raise priviliges */
1990
if(raise_privileges() == 0){
2100
/* Re-raise privileges */
2101
ret_errno = raise_privileges();
2102
if(ret_errno != 0){
2103
errno = ret_errno;
2104
perror_plus("Failed to raise privileges");
2105
} else {
1991
2106
struct stat st;
1992
2107
1993
2108
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2033
2148
}
2034
2149
2035
2150
/* Lower privileges */
2036
lower_privileges();
2151
ret_errno = lower_privileges();
2152
if(ret_errno != 0){
2153
errno = ret_errno;
2154
perror_plus("Failed to lower privileges");
2155
}
2037
2156
}
2038
2157
}
2039
2158
2063
2182
goto end;
2064
2183
}
2065
2184
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2066
interfaces_hooks_size = mc.interfaces_size;
2067
argz_stringify(interfaces_hooks, interfaces_hooks_size,
2068
(int)',');
2069
}
2070
if(not run_network_hooks("start", interfaces_hooks != NULL ?
2071
interfaces_hooks : "", delay)){
2072
goto end;
2073
}
2185
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2186
}
2187
run_network_hooks("start", interfaces_hooks != NULL ?
2188
interfaces_hooks : "", delay);
2074
2189
}
2075
2190
2076
2191
if(not debug){
2154
2269
2155
2270
/* If no interfaces were specified, make a list */
2156
2271
if(mc.interfaces == NULL){
2157
struct dirent **direntries;
2272
struct dirent **direntries = NULL;
2158
2273
/* Look for any good interfaces */
2159
2274
ret = scandir(sys_class_net, &direntries, good_interface,
2160
2275
alphasort);
2164
2279
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2165
2280
direntries[i]->d_name);
2166
2281
if(ret_errno != 0){
2282
errno = ret_errno;
2167
2283
perror_plus("argz_add");
2284
free(direntries[i]);
2168
2285
continue;
2169
2286
}
2170
2287
if(debug){
2171
2288
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2172
2289
direntries[i]->d_name);
2173
2290
}
2291
free(direntries[i]);
2174
2292
}
2175
2293
free(direntries);
2176
2294
} else {
2177
free(direntries);
2295
if(ret == 0){
2296
free(direntries);
2297
}
2178
2298
fprintf_plus(stderr, "Could not find a network interface\n");
2179
2299
exitcode = EXIT_FAILURE;
2180
2300
goto end;
2181
2301
}
2182
2302
}
2183
2303
2184
/* Bring up interfaces which are down */
2304
/* Bring up interfaces which are down, and remove any "none"s */
2185
2305
{
2186
2306
char *interface = NULL;
2187
2307
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2203
2323
break;
2204
2324
}
2205
2325
bool interface_was_up = interface_is_up(interface);
2206
ret = bring_up_interface(interface, delay);
2326
errno = bring_up_interface(interface, delay);
2207
2327
if(not interface_was_up){
2208
if(ret != 0){
2209
errno = ret;
2328
if(errno != 0){
2210
2329
perror_plus("Failed to bring up interface");
2211
2330
} else {
2212
ret_errno = argz_add(&interfaces_to_take_down,
2213
&interfaces_to_take_down_size,
2214
interface);
2331
errno = argz_add(&interfaces_to_take_down,
2332
&interfaces_to_take_down_size,
2333
interface);
2334
if(errno != 0){
2335
perror_plus("argz_add");
2336
}
2215
2337
}
2216
2338
}
2217
2339
}
2246
2368
goto end;
2247
2369
}
2248
2370
2249
if(mkdtemp(tempdir) == NULL){
2371
/* Try /run/tmp before /tmp */
2372
tempdir = mkdtemp(run_tempdir);
2373
if(tempdir == NULL and errno == ENOENT){
2374
if(debug){
2375
fprintf_plus(stderr, "Tempdir %s did not work, trying %s\n",
2376
run_tempdir, old_tempdir);
2377
}
2378
tempdir = mkdtemp(old_tempdir);
2379
}
2380
if(tempdir == NULL){
2250
2381
perror_plus("mkdtemp");
2251
2382
goto end;
2252
2383
}
2253
tempdir_created = true;
2254
2384
2255
2385
if(quit_now){
2256
2386
goto end;
2328
2458
fprintf_plus(stderr, "Retrying in %d seconds\n",
2329
2459
(int)retry_interval);
2330
2460
}
2331
sleep((int)retry_interval);
2461
sleep((unsigned int)retry_interval);
2332
2462
}
2333
2463
2334
if (not quit_now){
2464
if(not quit_now){
2335
2465
exitcode = EXIT_SUCCESS;
2336
2466
}
2337
2467
2392
2522
if(debug){
2393
2523
fprintf_plus(stderr, "Starting Avahi loop search\n");
2394
2524
}
2395
2525
2396
2526
ret = avahi_loop_with_timeout(simple_poll,
2397
2527
(int)(retry_interval * 1000), &mc);
2398
2528
if(debug){
2434
2564
mc.current_server->prev->next = NULL;
2435
2565
while(mc.current_server != NULL){
2436
2566
server *next = mc.current_server->next;
2567
#ifdef __GNUC__
2568
#pragma GCC diagnostic push
2569
#pragma GCC diagnostic ignored "-Wcast-qual"
2570
#endif
2571
free((char *)(mc.current_server->ip));
2572
#ifdef __GNUC__
2573
#pragma GCC diagnostic pop
2574
#endif
2437
2575
free(mc.current_server);
2438
2576
mc.current_server = next;
2439
2577
}
2440
2578
}
2441
2579
2442
/* Re-raise priviliges */
2580
/* Re-raise privileges */
2443
2581
{
2444
raise_privileges();
2445
2446
/* Run network hooks */
2447
run_network_hooks("stop", interfaces_hooks != NULL ?
2448
interfaces_hooks : "", delay);
2449
2450
/* Take down the network interfaces which were brought up */
2451
{
2452
char *interface = NULL;
2453
while((interface=argz_next(interfaces_to_take_down,
2454
interfaces_to_take_down_size,
2455
interface))){
2456
ret_errno = take_down_interface(interface);
2457
if(ret_errno != 0){
2458
errno = ret_errno;
2459
perror_plus("Failed to take down interface");
2460
}
2461
}
2462
if(debug and (interfaces_to_take_down == NULL)){
2463
fprintf_plus(stderr, "No interfaces needed to be taken"
2464
" down\n");
2465
}
2466
}
2467
2468
lower_privileges_permanently();
2582
ret_errno = raise_privileges();
2583
if(ret_errno != 0){
2584
errno = ret_errno;
2585
perror_plus("Failed to raise privileges");
2586
} else {
2587
2588
/* Run network hooks */
2589
run_network_hooks("stop", interfaces_hooks != NULL ?
2590
interfaces_hooks : "", delay);
2591
2592
/* Take down the network interfaces which were brought up */
2593
{
2594
char *interface = NULL;
2595
while((interface=argz_next(interfaces_to_take_down,
2596
interfaces_to_take_down_size,
2597
interface))){
2598
ret_errno = take_down_interface(interface);
2599
if(ret_errno != 0){
2600
errno = ret_errno;
2601
perror_plus("Failed to take down interface");
2602
}
2603
}
2604
if(debug and (interfaces_to_take_down == NULL)){
2605
fprintf_plus(stderr, "No interfaces needed to be taken"
2606
" down\n");
2607
}
2608
}
2609
}
2610
2611
ret_errno = lower_privileges_permanently();
2612
if(ret_errno != 0){
2613
errno = ret_errno;
2614
perror_plus("Failed to lower privileges permanently");
2615
}
2469
2616
}
2470
2617
2471
2618
free(interfaces_to_take_down);
2472
2619
free(interfaces_hooks);
2473
2620
2474
2621
/* Removes the GPGME temp directory and all files inside */
2475
if(tempdir_created){
2622
if(tempdir != NULL){
2476
2623
struct dirent **direntries = NULL;
2477
struct dirent *direntry = NULL;
2478
int numentries = scandir(tempdir, &direntries, notdotentries,
2479
alphasort);
2480
if (numentries > 0){
2481
for(int i = 0; i < numentries; i++){
2482
direntry = direntries[i];
2483
char *fullname = NULL;
2484
ret = asprintf(&fullname, "%s/%s", tempdir,
2485
direntry->d_name);
2486
if(ret < 0){
2487
perror_plus("asprintf");
2488
continue;
2489
}
2490
ret = remove(fullname);
2491
if(ret == -1){
2492
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2493
strerror(errno));
2494
}
2495
free(fullname);
2624
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY |
2625
O_NOFOLLOW));
2626
if(tempdir_fd == -1){
2627
perror_plus("open");
2628
} else {
2629
#ifdef __GLIBC__
2630
#if __GLIBC_PREREQ(2, 15)
2631
int numentries = scandirat(tempdir_fd, ".", &direntries,
2632
notdotentries, alphasort);
2633
#else /* not __GLIBC_PREREQ(2, 15) */
2634
int numentries = scandir(tempdir, &direntries, notdotentries,
2635
alphasort);
2636
#endif /* not __GLIBC_PREREQ(2, 15) */
2637
#else /* not __GLIBC__ */
2638
int numentries = scandir(tempdir, &direntries, notdotentries,
2639
alphasort);
2640
#endif /* not __GLIBC__ */
2641
if(numentries >= 0){
2642
for(int i = 0; i < numentries; i++){
2643
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
2644
if(ret == -1){
2645
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
2646
" \"%s\", 0): %s\n", tempdir,
2647
direntries[i]->d_name, strerror(errno));
2648
}
2649
free(direntries[i]);
2650
}
2651
2652
/* need to clean even if 0 because man page doesn't specify */
2653
free(direntries);
2654
if(numentries == -1){
2655
perror_plus("scandir");
2656
}
2657
ret = rmdir(tempdir);
2658
if(ret == -1 and errno != ENOENT){
2659
perror_plus("rmdir");
2660
}
2496
2661
}
2497
}
2498
2499
/* need to clean even if 0 because man page doesn't specify */
2500
free(direntries);
2501
if (numentries == -1){
2502
perror_plus("scandir");
2503
}
2504
ret = rmdir(tempdir);
2505
if(ret == -1 and errno != ENOENT){
2506
perror_plus("rmdir");
2662
TEMP_FAILURE_RETRY(close(tempdir_fd));
2507
2663
}
2508
2664
}
2509
2665
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0