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 729
- compare with another revision
- download diff
- download tarball
- view history from revision 729
- Committer: Teddy Hogeborn
- Date: 2014-08-09 13:12:55 UTC
- Revision ID: teddy@recompile.se-20140809131255-lp31j98u2pl0xpe6
mandos: Stop using str() and remove unnecessary unicode() calls.
* mandos (if_nametoindex): Use "bytes" literal instead of str().
(initlogger): Use a unicode string for log device.
(AvahiError.__unicode__): Removed.
(DBusPropertyException.__unicode__): - '' -
(ClientDBus.Secret_dbus_property): Use bytes() instead of str().
(IPv6_TCPServer.server_bind): Use .encode() instead of str().
(string_to_delta): Removed unnecessary unicode() call.
(main): Use "isinstance(x, bytes)" instead of "type(x) is str", use
.decode() instead of unicode(), and use .encode() instead of
str().
* mandos (if_nametoindex): Use "bytes" literal instead of str().
(initlogger): Use a unicode string for log device.
(AvahiError.__unicode__): Removed.
(DBusPropertyException.__unicode__): - '' -
(ClientDBus.Secret_dbus_property): Use bytes() instead of str().
(IPv6_TCPServer.server_bind): Use .encode() instead of str().
(string_to_delta): Removed unnecessary unicode() call.
(main): Use "isinstance(x, bytes)" instead of "type(x) is str", use
.decode() instead of unicode(), and use .encode() instead of
str().
- 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 */
691
if(if_index != AVAHI_IF_UNSPEC and mc->interfaces != NULL){
692
/* Check if the interface is one of the interfaces we are using */
693
bool match = false;
694
{
695
char *interface = NULL;
696
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
697
interface))){
698
if(if_nametoindex(interface) == (unsigned int)if_index){
699
match = true;
700
break;
701
}
702
}
703
}
704
if(not match){
705
/* This interface does not match any in the list, so we don't
706
connect to the server */
707
if(debug){
708
char interface[IF_NAMESIZE];
709
if(if_indextoname((unsigned int)if_index, interface) == NULL){
710
perror_plus("if_indextoname");
711
} else {
712
fprintf_plus(stderr, "Skipping server on non-used interface"
713
" \"%s\"\n",
714
if_indextoname((unsigned int)if_index,
715
interface));
716
}
717
}
718
return -1;
719
}
720
}
721
662
722
ret = init_gnutls_session(&session, mc);
663
723
if(ret != 0){
664
724
return -1;
684
744
685
745
memset(&to, 0, sizeof(to));
686
746
if(af == AF_INET6){
687
to.in6.sin6_family = (sa_family_t)af;
688
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);
689
749
} else { /* IPv4 */
690
to.in.sin_family = (sa_family_t)af;
691
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);
692
752
}
693
753
if(ret < 0 ){
694
754
int e = errno;
703
763
goto mandos_end;
704
764
}
705
765
if(af == AF_INET6){
706
to.in6.sin6_port = htons(port);
707
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
708
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
709
-Wunreachable-code*/
766
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
767
if(IN6_IS_ADDR_LINKLOCAL
768
(&((struct sockaddr_in6 *)&to)->sin6_addr)){
710
769
if(if_index == AVAHI_IF_UNSPEC){
711
770
fprintf_plus(stderr, "An IPv6 link-local address is"
712
771
" incomplete without a network interface\n");
714
773
goto mandos_end;
715
774
}
716
775
/* Set the network interface number as scope */
717
to.in6.sin6_scope_id = (uint32_t)if_index;
776
((struct sockaddr_in6 *)&to)->sin6_scope_id = (uint32_t)if_index;
718
777
}
719
778
} else {
720
to.in.sin_port = htons(port); /* Spurious warnings from
721
-Wconversion and
722
-Wunreachable-code */
779
((struct sockaddr_in *)&to)->sin_port = htons(port);
723
780
}
724
781
725
782
if(quit_now){
742
799
}
743
800
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
744
801
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
745
const char *pcret;
746
802
if(af == AF_INET6){
747
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
748
sizeof(addrstr));
803
ret = getnameinfo((struct sockaddr *)&to,
804
sizeof(struct sockaddr_in6),
805
addrstr, sizeof(addrstr), NULL, 0,
806
NI_NUMERICHOST);
749
807
} else {
750
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
751
sizeof(addrstr));
808
ret = getnameinfo((struct sockaddr *)&to,
809
sizeof(struct sockaddr_in),
810
addrstr, sizeof(addrstr), NULL, 0,
811
NI_NUMERICHOST);
752
812
}
753
if(pcret == NULL){
754
perror_plus("inet_ntop");
755
} else {
756
if(strcmp(addrstr, ip) != 0){
757
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
758
}
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);
759
819
}
760
820
}
761
821
765
825
}
766
826
767
827
if(af == AF_INET6){
768
ret = connect(tcp_sd, &to.in6, sizeof(to));
828
ret = connect(tcp_sd, (struct sockaddr *)&to,
829
sizeof(struct sockaddr_in6));
769
830
} else {
770
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
831
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
832
sizeof(struct sockaddr_in));
771
833
}
772
834
if(ret < 0){
773
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
835
if((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
774
836
int e = errno;
775
837
perror_plus("connect");
776
838
errno = e;
991
1053
return retval;
992
1054
}
993
1055
1056
__attribute__((nonnull))
994
1057
static void resolve_callback(AvahiSServiceResolver *r,
995
1058
AvahiIfIndex interface,
996
1059
AvahiProtocol proto,
1004
1067
AVAHI_GCC_UNUSED AvahiStringList *txt,
1005
1068
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1006
1069
flags,
1007
void* mc){
1070
void *mc){
1008
1071
if(r == NULL){
1009
1072
return;
1010
1073
}
1013
1076
timed out */
1014
1077
1015
1078
if(quit_now){
1079
avahi_s_service_resolver_free(r);
1016
1080
return;
1017
1081
}
1018
1082
1063
1127
const char *domain,
1064
1128
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1065
1129
flags,
1066
void* mc){
1130
void *mc){
1067
1131
if(b == NULL){
1068
1132
return;
1069
1133
}
1129
1193
errno = old_errno;
1130
1194
}
1131
1195
1196
__attribute__((nonnull, warn_unused_result))
1132
1197
bool get_flags(const char *ifname, struct ifreq *ifr){
1133
1198
int ret;
1134
1199
error_t ret_errno;
1153
1218
return true;
1154
1219
}
1155
1220
1221
__attribute__((nonnull, warn_unused_result))
1156
1222
bool good_flags(const char *ifname, const struct ifreq *ifr){
1157
1223
1158
1224
/* Reject the loopback device */
1200
1266
* corresponds to an acceptable network device.
1201
1267
* (This function is passed to scandir(3) as a filter function.)
1202
1268
*/
1269
__attribute__((nonnull, warn_unused_result))
1203
1270
int good_interface(const struct dirent *if_entry){
1204
1271
if(if_entry->d_name[0] == '.'){
1205
1272
return 0;
1223
1290
/*
1224
1291
* This function determines if a network interface is up.
1225
1292
*/
1293
__attribute__((nonnull, warn_unused_result))
1226
1294
bool interface_is_up(const char *interface){
1227
1295
struct ifreq ifr;
1228
1296
if(not get_flags(interface, &ifr)){
1239
1307
/*
1240
1308
* This function determines if a network interface is running
1241
1309
*/
1310
__attribute__((nonnull, warn_unused_result))
1242
1311
bool interface_is_running(const char *interface){
1243
1312
struct ifreq ifr;
1244
1313
if(not get_flags(interface, &ifr)){
1252
1321
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1253
1322
}
1254
1323
1324
__attribute__((nonnull, pure, warn_unused_result))
1255
1325
int notdotentries(const struct dirent *direntry){
1256
1326
/* Skip "." and ".." */
1257
1327
if(direntry->d_name[0] == '.'
1264
1334
}
1265
1335
1266
1336
/* Is this directory entry a runnable program? */
1337
__attribute__((nonnull, warn_unused_result))
1267
1338
int runnable_hook(const struct dirent *direntry){
1268
1339
int ret;
1269
1340
size_t sret;
1277
1348
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1278
1349
"abcdefghijklmnopqrstuvwxyz"
1279
1350
"0123456789"
1280
"_-");
1351
"_.-");
1281
1352
if((direntry->d_name)[sret] != '\0'){
1282
1353
/* Contains non-allowed characters */
1283
1354
if(debug){
1287
1358
return 0;
1288
1359
}
1289
1360
1290
char *fullname = NULL;
1291
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1292
if(ret < 0){
1293
perror_plus("asprintf");
1294
return 0;
1295
}
1296
1297
ret = stat(fullname, &st);
1361
ret = fstatat(hookdir_fd, direntry->d_name, &st, 0);
1298
1362
if(ret == -1){
1299
1363
if(debug){
1300
1364
perror_plus("Could not stat hook");
1324
1388
return 1;
1325
1389
}
1326
1390
1391
__attribute__((nonnull, warn_unused_result))
1327
1392
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1328
1393
mandos_context *mc){
1329
1394
int ret;
1333
1398
1334
1399
while(true){
1335
1400
if(mc->current_server == NULL){
1336
if (debug){
1401
if(debug){
1337
1402
fprintf_plus(stderr, "Wait until first server is found."
1338
1403
" No timeout!\n");
1339
1404
}
1340
1405
ret = avahi_simple_poll_iterate(s, -1);
1341
1406
} else {
1342
if (debug){
1407
if(debug){
1343
1408
fprintf_plus(stderr, "Check current_server if we should run"
1344
1409
" it, or wait\n");
1345
1410
}
1362
1427
- ((intmax_t)waited_time.tv_sec * 1000))
1363
1428
- ((intmax_t)waited_time.tv_nsec / 1000000));
1364
1429
1365
if (debug){
1430
if(debug){
1366
1431
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1367
1432
block_time);
1368
1433
}
1390
1455
ret = avahi_simple_poll_iterate(s, (int)block_time);
1391
1456
}
1392
1457
if(ret != 0){
1393
if (ret > 0 or errno != EINTR){
1458
if(ret > 0 or errno != EINTR){
1394
1459
return (ret != 1) ? ret : 0;
1395
1460
}
1396
1461
}
1398
1463
}
1399
1464
1400
1465
/* Set effective uid to 0, return errno */
1466
__attribute__((warn_unused_result))
1401
1467
error_t raise_privileges(void){
1402
1468
error_t old_errno = errno;
1403
1469
error_t ret_errno = 0;
1404
1470
if(seteuid(0) == -1){
1405
1471
ret_errno = errno;
1406
perror_plus("seteuid");
1407
1472
}
1408
1473
errno = old_errno;
1409
1474
return ret_errno;
1410
1475
}
1411
1476
1412
1477
/* Set effective and real user ID to 0. Return errno. */
1478
__attribute__((warn_unused_result))
1413
1479
error_t raise_privileges_permanently(void){
1414
1480
error_t old_errno = errno;
1415
1481
error_t ret_errno = raise_privileges();
1419
1485
}
1420
1486
if(setuid(0) == -1){
1421
1487
ret_errno = errno;
1422
perror_plus("seteuid");
1423
1488
}
1424
1489
errno = old_errno;
1425
1490
return ret_errno;
1426
1491
}
1427
1492
1428
1493
/* Set effective user ID to unprivileged saved user ID */
1494
__attribute__((warn_unused_result))
1429
1495
error_t lower_privileges(void){
1430
1496
error_t old_errno = errno;
1431
1497
error_t ret_errno = 0;
1432
1498
if(seteuid(uid) == -1){
1433
1499
ret_errno = errno;
1434
perror_plus("seteuid");
1435
1500
}
1436
1501
errno = old_errno;
1437
1502
return ret_errno;
1438
1503
}
1439
1504
1440
1505
/* Lower privileges permanently */
1506
__attribute__((warn_unused_result))
1441
1507
error_t lower_privileges_permanently(void){
1442
1508
error_t old_errno = errno;
1443
1509
error_t ret_errno = 0;
1444
1510
if(setuid(uid) == -1){
1445
1511
ret_errno = errno;
1446
perror_plus("setuid");
1447
1512
}
1448
1513
errno = old_errno;
1449
1514
return ret_errno;
1450
1515
}
1451
1516
1452
bool run_network_hooks(const char *mode, const char *interface,
1517
__attribute__((nonnull))
1518
void run_network_hooks(const char *mode, const char *interface,
1453
1519
const float delay){
1454
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
}
1455
1551
struct dirent *direntry;
1456
1552
int ret;
1457
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1458
alphasort);
1459
if(numhooks == -1){
1460
if(errno == ENOENT){
1461
if(debug){
1462
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1463
" found\n", hookdir);
1464
}
1465
} else {
1466
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);
1467
1559
}
1468
} else {
1469
int devnull = open("/dev/null", O_RDONLY);
1470
for(int i = 0; i < numhooks; i++){
1471
direntry = direntries[i];
1472
char *fullname = NULL;
1473
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1474
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){
1475
1621
perror_plus("asprintf");
1476
continue;
1477
}
1478
if(debug){
1479
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1480
direntry->d_name);
1481
}
1482
pid_t hook_pid = fork();
1483
if(hook_pid == 0){
1484
/* Child */
1485
/* Raise privileges */
1486
raise_privileges_permanently();
1487
/* Set group */
1488
errno = 0;
1489
ret = setgid(0);
1490
if(ret == -1){
1491
perror_plus("setgid");
1492
}
1493
/* Reset supplementary groups */
1494
errno = 0;
1495
ret = setgroups(0, NULL);
1496
if(ret == -1){
1497
perror_plus("setgroups");
1498
}
1499
dup2(devnull, STDIN_FILENO);
1500
close(devnull);
1501
dup2(STDERR_FILENO, STDOUT_FILENO);
1502
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1503
if(ret == -1){
1504
perror_plus("setenv");
1505
_exit(EX_OSERR);
1506
}
1507
ret = setenv("DEVICE", interface, 1);
1508
if(ret == -1){
1509
perror_plus("setenv");
1510
_exit(EX_OSERR);
1511
}
1512
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1513
if(ret == -1){
1514
perror_plus("setenv");
1515
_exit(EX_OSERR);
1516
}
1517
ret = setenv("MODE", mode, 1);
1518
if(ret == -1){
1519
perror_plus("setenv");
1520
_exit(EX_OSERR);
1521
}
1522
char *delaystring;
1523
ret = asprintf(&delaystring, "%f", delay);
1524
if(ret == -1){
1525
perror_plus("asprintf");
1526
_exit(EX_OSERR);
1527
}
1528
ret = setenv("DELAY", delaystring, 1);
1529
if(ret == -1){
1530
free(delaystring);
1531
perror_plus("setenv");
1532
_exit(EX_OSERR);
1533
}
1622
_exit(EX_OSERR);
1623
}
1624
ret = setenv("DELAY", delaystring, 1);
1625
if(ret == -1){
1534
1626
free(delaystring);
1535
if(connect_to != NULL){
1536
ret = setenv("CONNECT", connect_to, 1);
1537
if(ret == -1){
1538
perror_plus("setenv");
1539
_exit(EX_OSERR);
1540
}
1541
}
1542
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1543
perror_plus("execl");
1544
_exit(EXIT_FAILURE);
1545
}
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;
1546
1673
} else {
1547
int status;
1548
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1549
perror_plus("waitpid");
1550
free(fullname);
1551
continue;
1552
}
1553
if(WIFEXITED(status)){
1554
if(WEXITSTATUS(status) != 0){
1555
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1556
" with status %d\n", direntry->d_name,
1557
WEXITSTATUS(status));
1558
free(fullname);
1559
continue;
1560
}
1561
} else if(WIFSIGNALED(status)){
1562
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1563
" signal %d\n", direntry->d_name,
1564
WTERMSIG(status));
1565
free(fullname);
1566
continue;
1567
} else {
1568
fprintf_plus(stderr, "Warning: network hook \"%s\""
1569
" crashed\n", direntry->d_name);
1570
free(fullname);
1571
continue;
1572
}
1573
}
1574
free(fullname);
1575
if(debug){
1576
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1577
direntry->d_name);
1578
}
1579
}
1580
close(devnull);
1581
}
1582
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);
1583
1693
}
1584
1694
1695
__attribute__((nonnull, warn_unused_result))
1585
1696
error_t bring_up_interface(const char *const interface,
1586
1697
const float delay){
1587
int sd = -1;
1588
1698
error_t old_errno = errno;
1589
error_t ret_errno = 0;
1590
int ret, ret_setflags;
1699
int ret;
1591
1700
struct ifreq network;
1592
1701
unsigned int if_index = if_nametoindex(interface);
1593
1702
if(if_index == 0){
1602
1711
}
1603
1712
1604
1713
if(not interface_is_up(interface)){
1605
if(not get_flags(interface, &network) and debug){
1714
error_t ret_errno = 0, ioctl_errno = 0;
1715
if(not get_flags(interface, &network)){
1606
1716
ret_errno = errno;
1607
1717
fprintf_plus(stderr, "Failed to get flags for interface "
1608
1718
"\"%s\"\n", interface);
1719
errno = old_errno;
1609
1720
return ret_errno;
1610
1721
}
1611
network.ifr_flags |= IFF_UP;
1722
network.ifr_flags |= IFF_UP; /* set flag */
1612
1723
1613
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1614
if(sd < 0){
1724
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1725
if(sd == -1){
1615
1726
ret_errno = errno;
1616
1727
perror_plus("socket");
1617
1728
errno = old_errno;
1618
1729
return ret_errno;
1619
1730
}
1620
1731
1621
1732
if(quit_now){
1622
close(sd);
1733
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1734
if(ret == -1){
1735
perror_plus("close");
1736
}
1623
1737
errno = old_errno;
1624
1738
return EINTR;
1625
1739
}
1629
1743
interface);
1630
1744
}
1631
1745
1632
/* Raise priviliges */
1633
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
}
1634
1752
1635
1753
#ifdef __linux__
1636
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1637
messages about the network interface to mess up the prompt */
1638
int ret_linux = klogctl(8, NULL, 5);
1639
bool restore_loglevel = true;
1640
if(ret_linux == -1){
1641
restore_loglevel = false;
1642
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
}
1643
1765
}
1644
1766
#endif /* __linux__ */
1645
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1646
ret_errno = errno;
1767
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1768
ioctl_errno = errno;
1647
1769
#ifdef __linux__
1648
1770
if(restore_loglevel){
1649
1771
ret_linux = klogctl(7, NULL, 0);
1653
1775
}
1654
1776
#endif /* __linux__ */
1655
1777
1656
/* Lower privileges */
1657
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
}
1658
1787
1659
1788
/* Close the socket */
1660
1789
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1663
1792
}
1664
1793
1665
1794
if(ret_setflags == -1){
1666
errno = ret_errno;
1795
errno = ioctl_errno;
1667
1796
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1668
1797
errno = old_errno;
1669
return ret_errno;
1798
return ioctl_errno;
1670
1799
}
1671
1800
} else if(debug){
1672
1801
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1690
1819
return 0;
1691
1820
}
1692
1821
1822
__attribute__((nonnull, warn_unused_result))
1693
1823
error_t take_down_interface(const char *const interface){
1694
int sd = -1;
1695
1824
error_t old_errno = errno;
1696
error_t ret_errno = 0;
1697
int ret, ret_setflags;
1698
1825
struct ifreq network;
1699
1826
unsigned int if_index = if_nametoindex(interface);
1700
1827
if(if_index == 0){
1703
1830
return ENXIO;
1704
1831
}
1705
1832
if(interface_is_up(interface)){
1833
error_t ret_errno = 0, ioctl_errno = 0;
1706
1834
if(not get_flags(interface, &network) and debug){
1707
1835
ret_errno = errno;
1708
1836
fprintf_plus(stderr, "Failed to get flags for interface "
1709
1837
"\"%s\"\n", interface);
1838
errno = old_errno;
1710
1839
return ret_errno;
1711
1840
}
1712
1841
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1713
1842
1714
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1715
if(sd < 0){
1843
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1844
if(sd == -1){
1716
1845
ret_errno = errno;
1717
1846
perror_plus("socket");
1718
1847
errno = old_errno;
1724
1853
interface);
1725
1854
}
1726
1855
1727
/* Raise priviliges */
1728
raise_privileges();
1729
1730
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1731
ret_errno = errno;
1732
1733
/* Lower privileges */
1734
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
}
1735
1875
1736
1876
/* Close the socket */
1737
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1877
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
1738
1878
if(ret == -1){
1739
1879
perror_plus("close");
1740
1880
}
1741
1881
1742
1882
if(ret_setflags == -1){
1743
errno = ret_errno;
1883
errno = ioctl_errno;
1744
1884
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1745
1885
errno = old_errno;
1746
return ret_errno;
1886
return ioctl_errno;
1747
1887
}
1748
1888
} else if(debug){
1749
1889
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1757
1897
int main(int argc, char *argv[]){
1758
1898
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1759
1899
.priority = "SECURE256:!CTYPE-X.509:"
1760
"+CTYPE-OPENPGP", .current_server = NULL,
1900
"+CTYPE-OPENPGP", .current_server = NULL,
1761
1901
.interfaces = NULL, .interfaces_size = 0 };
1762
1902
AvahiSServiceBrowser *sb = NULL;
1763
1903
error_t ret_errno;
1767
1907
int exitcode = EXIT_SUCCESS;
1768
1908
char *interfaces_to_take_down = NULL;
1769
1909
size_t interfaces_to_take_down_size = 0;
1770
char tempdir[] = "/tmp/mandosXXXXXX";
1771
bool tempdir_created = false;
1910
char run_tempdir[] = "/run/tmp/mandosXXXXXX";
1911
char old_tempdir[] = "/tmp/mandosXXXXXX";
1912
char *tempdir = NULL;
1772
1913
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1773
1914
const char *seckey = PATHDIR "/" SECKEY;
1774
1915
const char *pubkey = PATHDIR "/" PUBKEY;
1775
1916
char *interfaces_hooks = NULL;
1776
size_t interfaces_hooks_size = 0;
1777
1917
1778
1918
bool gnutls_initialized = false;
1779
1919
bool gpgme_initialized = false;
1957
2097
/* Work around Debian bug #633582:
1958
2098
<http://bugs.debian.org/633582> */
1959
2099
1960
/* Re-raise priviliges */
1961
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 {
1962
2106
struct stat st;
1963
2107
1964
2108
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2004
2148
}
2005
2149
2006
2150
/* Lower privileges */
2007
errno = 0;
2008
ret = seteuid(uid);
2009
if(ret == -1){
2010
perror_plus("seteuid");
2151
ret_errno = lower_privileges();
2152
if(ret_errno != 0){
2153
errno = ret_errno;
2154
perror_plus("Failed to lower privileges");
2011
2155
}
2012
2156
}
2013
2157
}
2014
2158
2015
/* Remove empty interface names */
2159
/* Remove invalid interface names (except "none") */
2016
2160
{
2017
2161
char *interface = NULL;
2018
2162
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2019
2163
interface))){
2020
if(if_nametoindex(interface) == 0){
2021
if(interface[0] != '\0' and strcmp(interface, "none") != 0){
2164
if(strcmp(interface, "none") != 0
2165
and if_nametoindex(interface) == 0){
2166
if(interface[0] != '\0'){
2022
2167
fprintf_plus(stderr, "Not using nonexisting interface"
2023
2168
" \"%s\"\n", interface);
2024
2169
}
2030
2175
2031
2176
/* Run network hooks */
2032
2177
{
2033
2034
2178
if(mc.interfaces != NULL){
2035
2179
interfaces_hooks = malloc(mc.interfaces_size);
2036
2180
if(interfaces_hooks == NULL){
2038
2182
goto end;
2039
2183
}
2040
2184
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2041
interfaces_hooks_size = mc.interfaces_size;
2042
argz_stringify(interfaces_hooks, interfaces_hooks_size,
2043
(int)',');
2044
}
2045
if(not run_network_hooks("start", interfaces_hooks != NULL ?
2046
interfaces_hooks : "", delay)){
2047
goto end;
2048
}
2185
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2186
}
2187
run_network_hooks("start", interfaces_hooks != NULL ?
2188
interfaces_hooks : "", delay);
2049
2189
}
2050
2190
2051
2191
if(not debug){
2129
2269
2130
2270
/* If no interfaces were specified, make a list */
2131
2271
if(mc.interfaces == NULL){
2132
struct dirent **direntries;
2272
struct dirent **direntries = NULL;
2133
2273
/* Look for any good interfaces */
2134
2274
ret = scandir(sys_class_net, &direntries, good_interface,
2135
2275
alphasort);
2139
2279
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2140
2280
direntries[i]->d_name);
2141
2281
if(ret_errno != 0){
2282
errno = ret_errno;
2142
2283
perror_plus("argz_add");
2284
free(direntries[i]);
2143
2285
continue;
2144
2286
}
2145
2287
if(debug){
2146
2288
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2147
2289
direntries[i]->d_name);
2148
2290
}
2291
free(direntries[i]);
2149
2292
}
2150
2293
free(direntries);
2151
2294
} else {
2152
free(direntries);
2295
if(ret == 0){
2296
free(direntries);
2297
}
2153
2298
fprintf_plus(stderr, "Could not find a network interface\n");
2154
2299
exitcode = EXIT_FAILURE;
2155
2300
goto end;
2156
2301
}
2157
2302
}
2158
2303
2304
/* Bring up interfaces which are down, and remove any "none"s */
2305
{
2306
char *interface = NULL;
2307
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2308
interface))){
2309
/* If interface name is "none", stop bringing up interfaces.
2310
Also remove all instances of "none" from the list */
2311
if(strcmp(interface, "none") == 0){
2312
argz_delete(&mc.interfaces, &mc.interfaces_size,
2313
interface);
2314
interface = NULL;
2315
while((interface = argz_next(mc.interfaces,
2316
mc.interfaces_size, interface))){
2317
if(strcmp(interface, "none") == 0){
2318
argz_delete(&mc.interfaces, &mc.interfaces_size,
2319
interface);
2320
interface = NULL;
2321
}
2322
}
2323
break;
2324
}
2325
bool interface_was_up = interface_is_up(interface);
2326
errno = bring_up_interface(interface, delay);
2327
if(not interface_was_up){
2328
if(errno != 0){
2329
perror_plus("Failed to bring up interface");
2330
} else {
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
}
2337
}
2338
}
2339
}
2340
if(debug and (interfaces_to_take_down == NULL)){
2341
fprintf_plus(stderr, "No interfaces were brought up\n");
2342
}
2343
}
2344
2159
2345
/* If we only got one interface, explicitly use only that one */
2160
2346
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
2161
2347
if(debug){
2165
2351
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
2166
2352
}
2167
2353
2168
/* Bring up interfaces which are down */
2169
if(not (argz_count(mc.interfaces, mc.interfaces_size) == 1
2170
and strcmp(mc.interfaces, "none") == 0)){
2171
char *interface = NULL;
2172
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2173
interface))){
2174
bool interface_was_up = interface_is_up(interface);
2175
ret = bring_up_interface(interface, delay);
2176
if(not interface_was_up){
2177
if(ret != 0){
2178
errno = ret;
2179
perror_plus("Failed to bring up interface");
2180
} else {
2181
ret_errno = argz_add(&interfaces_to_take_down,
2182
&interfaces_to_take_down_size,
2183
interface);
2184
}
2185
}
2186
}
2187
free(mc.interfaces);
2188
mc.interfaces = NULL;
2189
mc.interfaces_size = 0;
2190
if(debug and (interfaces_to_take_down == NULL)){
2191
fprintf_plus(stderr, "No interfaces were brought up\n");
2192
}
2193
}
2194
2195
2354
if(quit_now){
2196
2355
goto end;
2197
2356
}
2209
2368
goto end;
2210
2369
}
2211
2370
2212
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){
2213
2381
perror_plus("mkdtemp");
2214
2382
goto end;
2215
2383
}
2216
tempdir_created = true;
2217
2384
2218
2385
if(quit_now){
2219
2386
goto end;
2255
2422
exitcode = EX_USAGE;
2256
2423
goto end;
2257
2424
}
2258
2425
2259
2426
if(quit_now){
2260
2427
goto end;
2261
2428
}
2291
2458
fprintf_plus(stderr, "Retrying in %d seconds\n",
2292
2459
(int)retry_interval);
2293
2460
}
2294
sleep((int)retry_interval);
2461
sleep((unsigned int)retry_interval);
2295
2462
}
2296
2463
2297
if (not quit_now){
2464
if(not quit_now){
2298
2465
exitcode = EXIT_SUCCESS;
2299
2466
}
2300
2467
2355
2522
if(debug){
2356
2523
fprintf_plus(stderr, "Starting Avahi loop search\n");
2357
2524
}
2358
2525
2359
2526
ret = avahi_loop_with_timeout(simple_poll,
2360
2527
(int)(retry_interval * 1000), &mc);
2361
2528
if(debug){
2370
2537
}
2371
2538
2372
2539
/* Cleanup things */
2540
free(mc.interfaces);
2541
2373
2542
if(sb != NULL)
2374
2543
avahi_s_service_browser_free(sb);
2375
2544
2395
2564
mc.current_server->prev->next = NULL;
2396
2565
while(mc.current_server != NULL){
2397
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
2398
2575
free(mc.current_server);
2399
2576
mc.current_server = next;
2400
2577
}
2401
2578
}
2402
2579
2403
/* Re-raise priviliges */
2580
/* Re-raise privileges */
2404
2581
{
2405
raise_privileges();
2406
2407
/* Run network hooks */
2408
run_network_hooks("stop", interfaces_hooks != NULL ?
2409
interfaces_hooks : "", delay);
2410
2411
/* Take down the network interfaces which were brought up */
2412
{
2413
char *interface = NULL;
2414
while((interface=argz_next(interfaces_to_take_down,
2415
interfaces_to_take_down_size,
2416
interface))){
2417
ret_errno = take_down_interface(interface);
2418
if(ret_errno != 0){
2419
errno = ret_errno;
2420
perror_plus("Failed to take down interface");
2421
}
2422
}
2423
if(debug and (interfaces_to_take_down == NULL)){
2424
fprintf_plus(stderr, "No interfaces needed to be taken"
2425
" down\n");
2426
}
2427
}
2428
2429
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
}
2430
2616
}
2431
2617
2432
2618
free(interfaces_to_take_down);
2433
2619
free(interfaces_hooks);
2434
2620
2435
2621
/* Removes the GPGME temp directory and all files inside */
2436
if(tempdir_created){
2622
if(tempdir != NULL){
2437
2623
struct dirent **direntries = NULL;
2438
struct dirent *direntry = NULL;
2439
int numentries = scandir(tempdir, &direntries, notdotentries,
2440
alphasort);
2441
if (numentries > 0){
2442
for(int i = 0; i < numentries; i++){
2443
direntry = direntries[i];
2444
char *fullname = NULL;
2445
ret = asprintf(&fullname, "%s/%s", tempdir,
2446
direntry->d_name);
2447
if(ret < 0){
2448
perror_plus("asprintf");
2449
continue;
2450
}
2451
ret = remove(fullname);
2452
if(ret == -1){
2453
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2454
strerror(errno));
2455
}
2456
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
}
2457
2661
}
2458
}
2459
2460
/* need to clean even if 0 because man page doesn't specify */
2461
free(direntries);
2462
if (numentries == -1){
2463
perror_plus("scandir");
2464
}
2465
ret = rmdir(tempdir);
2466
if(ret == -1 and errno != ENOENT){
2467
perror_plus("rmdir");
2662
TEMP_FAILURE_RETRY(close(tempdir_fd));
2468
2663
}
2469
2664
}
2470
2665
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0