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 603
- compare with another revision
- download diff
- download tarball
- view history from revision 603
- Committer: Teddy Hogeborn
- Date: 2012-06-16 23:39:10 UTC
- Revision ID: teddy@recompile.se-20120616233910-jxxxriq608qa6o8z
* plugins.d/mandos-client (mandos_context): New "interfaces" and
"interfaces_size" members.
(main): Removed "interfaces" and "interfaces_size" variabled; all
users changed.
"interfaces_size" members.
(main): Removed "interfaces" and "interfaces_size" variabled; all
users changed.
- files removed:
- 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 © 2008-2014 Teddy Hogeborn
13
* Copyright © 2008-2014 Björn Påhlsson
12
* Copyright © 2008-2012 Teddy Hogeborn
13
* Copyright © 2008-2012 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(),
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
getnameinfo() */
60
#include <fcntl.h> /* open(), unlinkat() */
58
inet_pton(), connect() */
59
#include <fcntl.h> /* open() */
61
60
#include <dirent.h> /* opendir(), struct dirent, readdir()
62
61
*/
63
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
73
72
*/
74
73
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
74
getuid(), getgid(), seteuid(),
76
setgid(), pause(), _exit(),
77
unlinkat() */
78
#include <arpa/inet.h> /* inet_pton(), htons() */
75
setgid(), pause(), _exit() */
76
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
79
77
#include <iso646.h> /* not, or, and */
80
78
#include <argp.h> /* struct argp_option, error_t, struct
81
79
argp_state, struct argp,
93
91
argz_delete(), argz_append(),
94
92
argz_stringify(), argz_add(),
95
93
argz_count() */
96
#include <netdb.h> /* getnameinfo(), NI_NUMERICHOST,
97
EAI_SYSTEM, gai_strerror() */
98
94
99
95
#ifdef __linux__
100
96
#include <sys/klog.h> /* klogctl() */
142
138
static const char sys_class_net[] = "/sys/class/net";
143
139
char *connect_to = NULL;
144
140
const char *hookdir = HOOKDIR;
145
int hookdir_fd = -1;
146
141
uid_t uid = 65534;
147
142
gid_t gid = 65534;
148
143
185
180
perror(print_text);
186
181
}
187
182
188
__attribute__((format (gnu_printf, 2, 3), nonnull))
183
__attribute__((format (gnu_printf, 2, 3)))
189
184
int fprintf_plus(FILE *stream, const char *format, ...){
190
185
va_list ap;
191
186
va_start (ap, format);
192
187
193
188
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
194
189
program_invocation_short_name));
195
return (int)TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
190
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
196
191
}
197
192
198
193
/*
200
195
* bytes. "buffer_capacity" is how much is currently allocated,
201
196
* "buffer_length" is how much is already used.
202
197
*/
203
__attribute__((nonnull, warn_unused_result))
204
198
size_t incbuffer(char **buffer, size_t buffer_length,
205
199
size_t buffer_capacity){
206
200
if(buffer_length + BUFFER_SIZE > buffer_capacity){
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;
201
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
202
if(buffer == NULL){
213
203
return 0;
214
204
}
215
*buffer = new_buf;
216
205
buffer_capacity += BUFFER_SIZE;
217
206
}
218
207
return buffer_capacity;
219
208
}
220
209
221
210
/* Add server to set of servers to retry periodically */
222
__attribute__((nonnull, warn_unused_result))
223
211
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
224
212
int af, server **current_server){
225
213
int ret;
234
222
.af = af };
235
223
if(new_server->ip == NULL){
236
224
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
free(new_server->ip);
244
free(new_server);
245
225
return false;
246
226
}
247
227
/* Special case of first server */
249
229
new_server->next = new_server;
250
230
new_server->prev = new_server;
251
231
*current_server = new_server;
232
/* Place the new server last in the list */
252
233
} else {
253
/* Place the new server last in the list */
254
234
new_server->next = *current_server;
255
235
new_server->prev = (*current_server)->prev;
256
236
new_server->prev->next = new_server;
257
237
(*current_server)->prev = new_server;
258
238
}
239
ret = clock_gettime(CLOCK_MONOTONIC, &(*current_server)->last_seen);
240
if(ret == -1){
241
perror_plus("clock_gettime");
242
return false;
243
}
259
244
return true;
260
245
}
261
246
262
247
/*
263
248
* Initialize GPGME.
264
249
*/
265
__attribute__((nonnull, warn_unused_result))
266
static bool init_gpgme(const char * const seckey,
267
const char * const pubkey,
268
const char * const tempdir,
269
mandos_context *mc){
250
static bool init_gpgme(const char *seckey, const char *pubkey,
251
const char *tempdir, mandos_context *mc){
270
252
gpgme_error_t rc;
271
253
gpgme_engine_info_t engine_info;
272
254
273
255
/*
274
256
* Helper function to insert pub and seckey to the engine keyring.
275
257
*/
276
bool import_key(const char * const filename){
258
bool import_key(const char *filename){
277
259
int ret;
278
260
int fd;
279
261
gpgme_data_t pgp_data;
360
342
* Decrypt OpenPGP data.
361
343
* Returns -1 on error
362
344
*/
363
__attribute__((nonnull, warn_unused_result))
364
345
static ssize_t pgp_packet_decrypt(const char *cryptotext,
365
346
size_t crypto_size,
366
347
char **plaintext,
486
467
return plaintext_length;
487
468
}
488
469
489
__attribute__((warn_unused_result))
490
static const char *safer_gnutls_strerror(int value){
470
static const char * safer_gnutls_strerror(int value){
491
471
const char *ret = gnutls_strerror(value);
492
472
if(ret == NULL)
493
473
ret = "(unknown)";
495
475
}
496
476
497
477
/* GnuTLS log function callback */
498
__attribute__((nonnull))
499
478
static void debuggnutls(__attribute__((unused)) int level,
500
479
const char* string){
501
480
fprintf_plus(stderr, "GnuTLS: %s", string);
502
481
}
503
482
504
__attribute__((nonnull, warn_unused_result))
505
483
static int init_gnutls_global(const char *pubkeyfilename,
506
484
const char *seckeyfilename,
507
485
mandos_context *mc){
581
559
return -1;
582
560
}
583
561
584
__attribute__((nonnull, warn_unused_result))
585
562
static int init_gnutls_session(gnutls_session_t *session,
586
563
mandos_context *mc){
587
564
int ret;
644
621
__attribute__((unused)) const char *txt){}
645
622
646
623
/* Called when a Mandos server is found */
647
__attribute__((nonnull, warn_unused_result))
648
624
static int start_mandos_communication(const char *ip, in_port_t port,
649
625
AvahiIfIndex if_index,
650
626
int af, mandos_context *mc){
651
627
int ret, tcp_sd = -1;
652
628
ssize_t sret;
653
struct sockaddr_storage to;
629
union {
630
struct sockaddr_in in;
631
struct sockaddr_in6 in6;
632
} to;
654
633
char *buffer = NULL;
655
634
char *decrypted_buffer = NULL;
656
635
size_t buffer_length = 0;
680
659
return -1;
681
660
}
682
661
683
/* If the interface is specified and we have a list of interfaces */
684
if(if_index != AVAHI_IF_UNSPEC and mc->interfaces != NULL){
685
/* Check if the interface is one of the interfaces we are using */
686
bool match = false;
687
{
688
char *interface = NULL;
689
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
690
interface))){
691
if(if_nametoindex(interface) == (unsigned int)if_index){
692
match = true;
693
break;
694
}
695
}
696
}
697
if(not match){
698
/* This interface does not match any in the list, so we don't
699
connect to the server */
700
if(debug){
701
char interface[IF_NAMESIZE];
702
if(if_indextoname((unsigned int)if_index, interface) == NULL){
703
perror_plus("if_indextoname");
704
} else {
705
fprintf_plus(stderr, "Skipping server on non-used interface"
706
" \"%s\"\n",
707
if_indextoname((unsigned int)if_index,
708
interface));
709
}
710
}
711
return -1;
712
}
713
}
714
715
662
ret = init_gnutls_session(&session, mc);
716
663
if(ret != 0){
717
664
return -1;
737
684
738
685
memset(&to, 0, sizeof(to));
739
686
if(af == AF_INET6){
740
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
741
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
687
to.in6.sin6_family = (sa_family_t)af;
688
ret = inet_pton(af, ip, &to.in6.sin6_addr);
742
689
} else { /* IPv4 */
743
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
744
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
690
to.in.sin_family = (sa_family_t)af;
691
ret = inet_pton(af, ip, &to.in.sin_addr);
745
692
}
746
693
if(ret < 0 ){
747
694
int e = errno;
756
703
goto mandos_end;
757
704
}
758
705
if(af == AF_INET6){
759
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
760
if(IN6_IS_ADDR_LINKLOCAL
761
(&((struct sockaddr_in6 *)&to)->sin6_addr)){
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*/
762
710
if(if_index == AVAHI_IF_UNSPEC){
763
711
fprintf_plus(stderr, "An IPv6 link-local address is"
764
712
" incomplete without a network interface\n");
766
714
goto mandos_end;
767
715
}
768
716
/* Set the network interface number as scope */
769
((struct sockaddr_in6 *)&to)->sin6_scope_id = (uint32_t)if_index;
717
to.in6.sin6_scope_id = (uint32_t)if_index;
770
718
}
771
719
} else {
772
((struct sockaddr_in *)&to)->sin_port = htons(port);
720
to.in.sin_port = htons(port); /* Spurious warnings from
721
-Wconversion and
722
-Wunreachable-code */
773
723
}
774
724
775
725
if(quit_now){
792
742
}
793
743
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
794
744
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
745
const char *pcret;
795
746
if(af == AF_INET6){
796
ret = getnameinfo((struct sockaddr *)&to,
797
sizeof(struct sockaddr_in6),
798
addrstr, sizeof(addrstr), NULL, 0,
799
NI_NUMERICHOST);
747
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
748
sizeof(addrstr));
800
749
} else {
801
ret = getnameinfo((struct sockaddr *)&to,
802
sizeof(struct sockaddr_in),
803
addrstr, sizeof(addrstr), NULL, 0,
804
NI_NUMERICHOST);
750
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
751
sizeof(addrstr));
805
752
}
806
if(ret == EAI_SYSTEM){
807
perror_plus("getnameinfo");
808
} else if(ret != 0) {
809
fprintf_plus(stderr, "getnameinfo: %s", gai_strerror(ret));
810
} else if(strcmp(addrstr, ip) != 0){
811
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
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
}
812
759
}
813
760
}
814
761
818
765
}
819
766
820
767
if(af == AF_INET6){
821
ret = connect(tcp_sd, (struct sockaddr *)&to,
822
sizeof(struct sockaddr_in6));
768
ret = connect(tcp_sd, &to.in6, sizeof(to));
823
769
} else {
824
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
825
sizeof(struct sockaddr_in));
770
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
826
771
}
827
772
if(ret < 0){
828
if((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
773
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
829
774
int e = errno;
830
775
perror_plus("connect");
831
776
errno = e;
1046
991
return retval;
1047
992
}
1048
993
1049
__attribute__((nonnull))
1050
994
static void resolve_callback(AvahiSServiceResolver *r,
1051
995
AvahiIfIndex interface,
1052
996
AvahiProtocol proto,
1060
1004
AVAHI_GCC_UNUSED AvahiStringList *txt,
1061
1005
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1062
1006
flags,
1063
void *mc){
1007
void* mc){
1064
1008
if(r == NULL){
1065
1009
return;
1066
1010
}
1119
1063
const char *domain,
1120
1064
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1121
1065
flags,
1122
void *mc){
1066
void* mc){
1123
1067
if(b == NULL){
1124
1068
return;
1125
1069
}
1185
1129
errno = old_errno;
1186
1130
}
1187
1131
1188
__attribute__((nonnull, warn_unused_result))
1189
1132
bool get_flags(const char *ifname, struct ifreq *ifr){
1190
1133
int ret;
1191
1134
error_t ret_errno;
1210
1153
return true;
1211
1154
}
1212
1155
1213
__attribute__((nonnull, warn_unused_result))
1214
1156
bool good_flags(const char *ifname, const struct ifreq *ifr){
1215
1157
1216
1158
/* Reject the loopback device */
1258
1200
* corresponds to an acceptable network device.
1259
1201
* (This function is passed to scandir(3) as a filter function.)
1260
1202
*/
1261
__attribute__((nonnull, warn_unused_result))
1262
1203
int good_interface(const struct dirent *if_entry){
1263
1204
if(if_entry->d_name[0] == '.'){
1264
1205
return 0;
1282
1223
/*
1283
1224
* This function determines if a network interface is up.
1284
1225
*/
1285
__attribute__((nonnull, warn_unused_result))
1286
1226
bool interface_is_up(const char *interface){
1287
1227
struct ifreq ifr;
1288
1228
if(not get_flags(interface, &ifr)){
1299
1239
/*
1300
1240
* This function determines if a network interface is running
1301
1241
*/
1302
__attribute__((nonnull, warn_unused_result))
1303
1242
bool interface_is_running(const char *interface){
1304
1243
struct ifreq ifr;
1305
1244
if(not get_flags(interface, &ifr)){
1313
1252
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1314
1253
}
1315
1254
1316
__attribute__((nonnull, pure, warn_unused_result))
1317
1255
int notdotentries(const struct dirent *direntry){
1318
1256
/* Skip "." and ".." */
1319
1257
if(direntry->d_name[0] == '.'
1326
1264
}
1327
1265
1328
1266
/* Is this directory entry a runnable program? */
1329
__attribute__((nonnull, warn_unused_result))
1330
1267
int runnable_hook(const struct dirent *direntry){
1331
1268
int ret;
1332
1269
size_t sret;
1340
1277
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1341
1278
"abcdefghijklmnopqrstuvwxyz"
1342
1279
"0123456789"
1343
"_.-");
1280
"_-");
1344
1281
if((direntry->d_name)[sret] != '\0'){
1345
1282
/* Contains non-allowed characters */
1346
1283
if(debug){
1350
1287
return 0;
1351
1288
}
1352
1289
1353
ret = fstatat(hookdir_fd, direntry->d_name, &st, 0);
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);
1354
1298
if(ret == -1){
1355
1299
if(debug){
1356
1300
perror_plus("Could not stat hook");
1380
1324
return 1;
1381
1325
}
1382
1326
1383
__attribute__((nonnull, warn_unused_result))
1384
1327
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1385
1328
mandos_context *mc){
1386
1329
int ret;
1390
1333
1391
1334
while(true){
1392
1335
if(mc->current_server == NULL){
1393
if(debug){
1336
if (debug){
1394
1337
fprintf_plus(stderr, "Wait until first server is found."
1395
1338
" No timeout!\n");
1396
1339
}
1397
1340
ret = avahi_simple_poll_iterate(s, -1);
1398
1341
} else {
1399
if(debug){
1342
if (debug){
1400
1343
fprintf_plus(stderr, "Check current_server if we should run"
1401
1344
" it, or wait\n");
1402
1345
}
1419
1362
- ((intmax_t)waited_time.tv_sec * 1000))
1420
1363
- ((intmax_t)waited_time.tv_nsec / 1000000));
1421
1364
1422
if(debug){
1365
if (debug){
1423
1366
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1424
1367
block_time);
1425
1368
}
1447
1390
ret = avahi_simple_poll_iterate(s, (int)block_time);
1448
1391
}
1449
1392
if(ret != 0){
1450
if(ret > 0 or errno != EINTR){
1393
if (ret > 0 or errno != EINTR){
1451
1394
return (ret != 1) ? ret : 0;
1452
1395
}
1453
1396
}
1455
1398
}
1456
1399
1457
1400
/* Set effective uid to 0, return errno */
1458
__attribute__((warn_unused_result))
1459
1401
error_t raise_privileges(void){
1460
1402
error_t old_errno = errno;
1461
1403
error_t ret_errno = 0;
1462
1404
if(seteuid(0) == -1){
1463
1405
ret_errno = errno;
1406
perror_plus("seteuid");
1464
1407
}
1465
1408
errno = old_errno;
1466
1409
return ret_errno;
1467
1410
}
1468
1411
1469
1412
/* Set effective and real user ID to 0. Return errno. */
1470
__attribute__((warn_unused_result))
1471
1413
error_t raise_privileges_permanently(void){
1472
1414
error_t old_errno = errno;
1473
1415
error_t ret_errno = raise_privileges();
1477
1419
}
1478
1420
if(setuid(0) == -1){
1479
1421
ret_errno = errno;
1422
perror_plus("seteuid");
1480
1423
}
1481
1424
errno = old_errno;
1482
1425
return ret_errno;
1483
1426
}
1484
1427
1485
1428
/* Set effective user ID to unprivileged saved user ID */
1486
__attribute__((warn_unused_result))
1487
1429
error_t lower_privileges(void){
1488
1430
error_t old_errno = errno;
1489
1431
error_t ret_errno = 0;
1490
1432
if(seteuid(uid) == -1){
1491
1433
ret_errno = errno;
1434
perror_plus("seteuid");
1492
1435
}
1493
1436
errno = old_errno;
1494
1437
return ret_errno;
1495
1438
}
1496
1439
1497
1440
/* Lower privileges permanently */
1498
__attribute__((warn_unused_result))
1499
1441
error_t lower_privileges_permanently(void){
1500
1442
error_t old_errno = errno;
1501
1443
error_t ret_errno = 0;
1502
1444
if(setuid(uid) == -1){
1503
1445
ret_errno = errno;
1446
perror_plus("setuid");
1504
1447
}
1505
1448
errno = old_errno;
1506
1449
return ret_errno;
1507
1450
}
1508
1451
1509
__attribute__((nonnull))
1510
void run_network_hooks(const char *mode, const char *interface,
1452
bool run_network_hooks(const char *mode, const char *interface,
1511
1453
const float delay){
1512
struct dirent **direntries = NULL;
1513
if(hookdir_fd == -1){
1514
hookdir_fd = open(hookdir, O_RDONLY);
1515
if(hookdir_fd == -1){
1516
if(errno == ENOENT){
1517
if(debug){
1518
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1519
" found\n", hookdir);
1520
}
1521
} else {
1522
perror_plus("open");
1523
}
1524
return;
1525
}
1526
}
1527
#ifdef __GLIBC__
1528
#if __GLIBC_PREREQ(2, 15)
1529
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1530
runnable_hook, alphasort);
1531
#else /* not __GLIBC_PREREQ(2, 15) */
1532
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1533
alphasort);
1534
#endif /* not __GLIBC_PREREQ(2, 15) */
1535
#else /* not __GLIBC__ */
1536
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1537
alphasort);
1538
#endif /* not __GLIBC__ */
1454
struct dirent **direntries;
1455
struct dirent *direntry;
1456
int ret;
1457
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1458
alphasort);
1539
1459
if(numhooks == -1){
1540
perror_plus("scandir");
1541
return;
1542
}
1543
struct dirent *direntry;
1544
int ret;
1545
int devnull = open("/dev/null", O_RDONLY);
1546
for(int i = 0; i < numhooks; i++){
1547
direntry = direntries[i];
1548
if(debug){
1549
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1550
direntry->d_name);
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");
1551
1467
}
1552
pid_t hook_pid = fork();
1553
if(hook_pid == 0){
1554
/* Child */
1555
/* Raise privileges */
1556
errno = raise_privileges_permanently();
1557
if(errno != 0){
1558
perror_plus("Failed to raise privileges");
1559
_exit(EX_NOPERM);
1560
}
1561
/* Set group */
1562
errno = 0;
1563
ret = setgid(0);
1564
if(ret == -1){
1565
perror_plus("setgid");
1566
_exit(EX_NOPERM);
1567
}
1568
/* Reset supplementary groups */
1569
errno = 0;
1570
ret = setgroups(0, NULL);
1571
if(ret == -1){
1572
perror_plus("setgroups");
1573
_exit(EX_NOPERM);
1574
}
1575
ret = dup2(devnull, STDIN_FILENO);
1576
if(ret == -1){
1577
perror_plus("dup2(devnull, STDIN_FILENO)");
1578
_exit(EX_OSERR);
1579
}
1580
ret = close(devnull);
1581
if(ret == -1){
1582
perror_plus("close");
1583
_exit(EX_OSERR);
1584
}
1585
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1586
if(ret == -1){
1587
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1588
_exit(EX_OSERR);
1589
}
1590
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1591
if(ret == -1){
1592
perror_plus("setenv");
1593
_exit(EX_OSERR);
1594
}
1595
ret = setenv("DEVICE", interface, 1);
1596
if(ret == -1){
1597
perror_plus("setenv");
1598
_exit(EX_OSERR);
1599
}
1600
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1601
if(ret == -1){
1602
perror_plus("setenv");
1603
_exit(EX_OSERR);
1604
}
1605
ret = setenv("MODE", mode, 1);
1606
if(ret == -1){
1607
perror_plus("setenv");
1608
_exit(EX_OSERR);
1609
}
1610
char *delaystring;
1611
ret = asprintf(&delaystring, "%f", (double)delay);
1612
if(ret == -1){
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){
1613
1475
perror_plus("asprintf");
1614
_exit(EX_OSERR);
1615
}
1616
ret = setenv("DELAY", delaystring, 1);
1617
if(ret == -1){
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
}
1618
1534
free(delaystring);
1619
perror_plus("setenv");
1620
_exit(EX_OSERR);
1621
}
1622
free(delaystring);
1623
if(connect_to != NULL){
1624
ret = setenv("CONNECT", connect_to, 1);
1625
if(ret == -1){
1626
perror_plus("setenv");
1627
_exit(EX_OSERR);
1628
}
1629
}
1630
int hook_fd = openat(hookdir_fd, direntry->d_name, O_RDONLY);
1631
if(hook_fd == -1){
1632
perror_plus("openat");
1633
_exit(EXIT_FAILURE);
1634
}
1635
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1636
perror_plus("close");
1637
_exit(EXIT_FAILURE);
1638
}
1639
if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },
1640
environ) == -1){
1641
perror_plus("fexecve");
1642
_exit(EXIT_FAILURE);
1643
}
1644
} else {
1645
int status;
1646
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1647
perror_plus("waitpid");
1648
continue;
1649
}
1650
if(WIFEXITED(status)){
1651
if(WEXITSTATUS(status) != 0){
1652
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1653
" with status %d\n", direntry->d_name,
1654
WEXITSTATUS(status));
1655
continue;
1656
}
1657
} else if(WIFSIGNALED(status)){
1658
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1659
" signal %d\n", direntry->d_name,
1660
WTERMSIG(status));
1661
continue;
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
}
1662
1546
} else {
1663
fprintf_plus(stderr, "Warning: network hook \"%s\""
1664
" crashed\n", direntry->d_name);
1665
continue;
1666
}
1667
}
1668
if(debug){
1669
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1670
direntry->d_name);
1671
}
1672
}
1673
free(direntries);
1674
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1675
perror_plus("close");
1676
} else {
1677
hookdir_fd = -1;
1678
}
1679
close(devnull);
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;
1680
1583
}
1681
1584
1682
__attribute__((nonnull, warn_unused_result))
1683
1585
error_t bring_up_interface(const char *const interface,
1684
1586
const float delay){
1587
int sd = -1;
1685
1588
error_t old_errno = errno;
1686
int ret;
1589
error_t ret_errno = 0;
1590
int ret, ret_setflags;
1687
1591
struct ifreq network;
1688
1592
unsigned int if_index = if_nametoindex(interface);
1689
1593
if(if_index == 0){
1698
1602
}
1699
1603
1700
1604
if(not interface_is_up(interface)){
1701
error_t ret_errno = 0, ioctl_errno = 0;
1702
if(not get_flags(interface, &network)){
1605
if(not get_flags(interface, &network) and debug){
1703
1606
ret_errno = errno;
1704
1607
fprintf_plus(stderr, "Failed to get flags for interface "
1705
1608
"\"%s\"\n", interface);
1706
errno = old_errno;
1707
1609
return ret_errno;
1708
1610
}
1709
network.ifr_flags |= IFF_UP; /* set flag */
1611
network.ifr_flags |= IFF_UP;
1710
1612
1711
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1712
if(sd == -1){
1613
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1614
if(sd < 0){
1713
1615
ret_errno = errno;
1714
1616
perror_plus("socket");
1715
1617
errno = old_errno;
1716
1618
return ret_errno;
1717
1619
}
1718
1620
1719
1621
if(quit_now){
1720
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1721
if(ret == -1){
1722
perror_plus("close");
1723
}
1622
close(sd);
1724
1623
errno = old_errno;
1725
1624
return EINTR;
1726
1625
}
1730
1629
interface);
1731
1630
}
1732
1631
1733
/* Raise privileges */
1734
ret_errno = raise_privileges();
1735
if(ret_errno != 0){
1736
errno = ret_errno;
1737
perror_plus("Failed to raise privileges");
1738
}
1632
/* Raise priviliges */
1633
raise_privileges();
1739
1634
1740
1635
#ifdef __linux__
1741
int ret_linux;
1742
bool restore_loglevel = false;
1743
if(ret_errno == 0){
1744
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1745
messages about the network interface to mess up the prompt */
1746
ret_linux = klogctl(8, NULL, 5);
1747
if(ret_linux == -1){
1748
perror_plus("klogctl");
1749
} else {
1750
restore_loglevel = true;
1751
}
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");
1752
1643
}
1753
1644
#endif /* __linux__ */
1754
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1755
ioctl_errno = errno;
1645
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1646
ret_errno = errno;
1756
1647
#ifdef __linux__
1757
1648
if(restore_loglevel){
1758
1649
ret_linux = klogctl(7, NULL, 0);
1762
1653
}
1763
1654
#endif /* __linux__ */
1764
1655
1765
/* If raise_privileges() succeeded above */
1766
if(ret_errno == 0){
1767
/* Lower privileges */
1768
ret_errno = lower_privileges();
1769
if(ret_errno != 0){
1770
errno = ret_errno;
1771
perror_plus("Failed to lower privileges");
1772
}
1773
}
1656
/* Lower privileges */
1657
lower_privileges();
1774
1658
1775
1659
/* Close the socket */
1776
1660
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1779
1663
}
1780
1664
1781
1665
if(ret_setflags == -1){
1782
errno = ioctl_errno;
1666
errno = ret_errno;
1783
1667
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1784
1668
errno = old_errno;
1785
return ioctl_errno;
1669
return ret_errno;
1786
1670
}
1787
1671
} else if(debug){
1788
1672
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1806
1690
return 0;
1807
1691
}
1808
1692
1809
__attribute__((nonnull, warn_unused_result))
1810
1693
error_t take_down_interface(const char *const interface){
1694
int sd = -1;
1811
1695
error_t old_errno = errno;
1696
error_t ret_errno = 0;
1697
int ret, ret_setflags;
1812
1698
struct ifreq network;
1813
1699
unsigned int if_index = if_nametoindex(interface);
1814
1700
if(if_index == 0){
1817
1703
return ENXIO;
1818
1704
}
1819
1705
if(interface_is_up(interface)){
1820
error_t ret_errno = 0, ioctl_errno = 0;
1821
1706
if(not get_flags(interface, &network) and debug){
1822
1707
ret_errno = errno;
1823
1708
fprintf_plus(stderr, "Failed to get flags for interface "
1824
1709
"\"%s\"\n", interface);
1825
errno = old_errno;
1826
1710
return ret_errno;
1827
1711
}
1828
1712
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1829
1713
1830
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1831
if(sd == -1){
1714
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1715
if(sd < 0){
1832
1716
ret_errno = errno;
1833
1717
perror_plus("socket");
1834
1718
errno = old_errno;
1840
1724
interface);
1841
1725
}
1842
1726
1843
/* Raise privileges */
1844
ret_errno = raise_privileges();
1845
if(ret_errno != 0){
1846
errno = ret_errno;
1847
perror_plus("Failed to raise privileges");
1848
}
1849
1850
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1851
ioctl_errno = errno;
1852
1853
/* If raise_privileges() succeeded above */
1854
if(ret_errno == 0){
1855
/* Lower privileges */
1856
ret_errno = lower_privileges();
1857
if(ret_errno != 0){
1858
errno = ret_errno;
1859
perror_plus("Failed to lower privileges");
1860
}
1861
}
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();
1862
1735
1863
1736
/* Close the socket */
1864
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
1737
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1865
1738
if(ret == -1){
1866
1739
perror_plus("close");
1867
1740
}
1868
1741
1869
1742
if(ret_setflags == -1){
1870
errno = ioctl_errno;
1743
errno = ret_errno;
1871
1744
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1872
1745
errno = old_errno;
1873
return ioctl_errno;
1746
return ret_errno;
1874
1747
}
1875
1748
} else if(debug){
1876
1749
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1884
1757
int main(int argc, char *argv[]){
1885
1758
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1886
1759
.priority = "SECURE256:!CTYPE-X.509:"
1887
"+CTYPE-OPENPGP", .current_server = NULL,
1760
"+CTYPE-OPENPGP", .current_server = NULL,
1888
1761
.interfaces = NULL, .interfaces_size = 0 };
1889
1762
AvahiSServiceBrowser *sb = NULL;
1890
1763
error_t ret_errno;
1894
1767
int exitcode = EXIT_SUCCESS;
1895
1768
char *interfaces_to_take_down = NULL;
1896
1769
size_t interfaces_to_take_down_size = 0;
1897
char run_tempdir[] = "/run/tmp/mandosXXXXXX";
1898
char old_tempdir[] = "/tmp/mandosXXXXXX";
1899
char *tempdir = NULL;
1770
char tempdir[] = "/tmp/mandosXXXXXX";
1771
bool tempdir_created = false;
1900
1772
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1901
1773
const char *seckey = PATHDIR "/" SECKEY;
1902
1774
const char *pubkey = PATHDIR "/" PUBKEY;
1903
1775
char *interfaces_hooks = NULL;
1776
size_t interfaces_hooks_size = 0;
1904
1777
1905
1778
bool gnutls_initialized = false;
1906
1779
bool gpgme_initialized = false;
2084
1957
/* Work around Debian bug #633582:
2085
1958
<http://bugs.debian.org/633582> */
2086
1959
2087
/* Re-raise privileges */
2088
ret_errno = raise_privileges();
2089
if(ret_errno != 0){
2090
errno = ret_errno;
2091
perror_plus("Failed to raise privileges");
2092
} else {
1960
/* Re-raise priviliges */
1961
if(raise_privileges() == 0){
2093
1962
struct stat st;
2094
1963
2095
1964
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2135
2004
}
2136
2005
2137
2006
/* Lower privileges */
2138
ret_errno = lower_privileges();
2139
if(ret_errno != 0){
2140
errno = ret_errno;
2141
perror_plus("Failed to lower privileges");
2007
errno = 0;
2008
ret = seteuid(uid);
2009
if(ret == -1){
2010
perror_plus("seteuid");
2142
2011
}
2143
2012
}
2144
2013
}
2145
2014
2146
/* Remove invalid interface names (except "none") */
2015
/* Remove empty interface names */
2147
2016
{
2148
2017
char *interface = NULL;
2149
2018
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2150
2019
interface))){
2151
if(strcmp(interface, "none") != 0
2152
and if_nametoindex(interface) == 0){
2153
if(interface[0] != '\0'){
2020
if(if_nametoindex(interface) == 0){
2021
if(interface[0] != '\0' and strcmp(interface, "none") != 0){
2154
2022
fprintf_plus(stderr, "Not using nonexisting interface"
2155
2023
" \"%s\"\n", interface);
2156
2024
}
2162
2030
2163
2031
/* Run network hooks */
2164
2032
{
2033
2165
2034
if(mc.interfaces != NULL){
2166
2035
interfaces_hooks = malloc(mc.interfaces_size);
2167
2036
if(interfaces_hooks == NULL){
2169
2038
goto end;
2170
2039
}
2171
2040
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2172
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2173
}
2174
run_network_hooks("start", interfaces_hooks != NULL ?
2175
interfaces_hooks : "", delay);
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
}
2176
2049
}
2177
2050
2178
2051
if(not debug){
2256
2129
2257
2130
/* If no interfaces were specified, make a list */
2258
2131
if(mc.interfaces == NULL){
2259
struct dirent **direntries = NULL;
2132
struct dirent **direntries;
2260
2133
/* Look for any good interfaces */
2261
2134
ret = scandir(sys_class_net, &direntries, good_interface,
2262
2135
alphasort);
2266
2139
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2267
2140
direntries[i]->d_name);
2268
2141
if(ret_errno != 0){
2269
errno = ret_errno;
2270
2142
perror_plus("argz_add");
2271
2143
continue;
2272
2144
}
2277
2149
}
2278
2150
free(direntries);
2279
2151
} else {
2280
if(ret == 0){
2281
free(direntries);
2282
}
2152
free(direntries);
2283
2153
fprintf_plus(stderr, "Could not find a network interface\n");
2284
2154
exitcode = EXIT_FAILURE;
2285
2155
goto end;
2286
2156
}
2287
2157
}
2288
2158
2289
/* Bring up interfaces which are down, and remove any "none"s */
2290
{
2159
/* If we only got one interface, explicitly use only that one */
2160
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
2161
if(debug){
2162
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2163
mc.interfaces);
2164
}
2165
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
2166
}
2167
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)){
2291
2171
char *interface = NULL;
2292
2172
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2293
2173
interface))){
2294
/* If interface name is "none", stop bringing up interfaces.
2295
Also remove all instances of "none" from the list */
2296
if(strcmp(interface, "none") == 0){
2297
argz_delete(&mc.interfaces, &mc.interfaces_size,
2298
interface);
2299
interface = NULL;
2300
while((interface = argz_next(mc.interfaces,
2301
mc.interfaces_size, interface))){
2302
if(strcmp(interface, "none") == 0){
2303
argz_delete(&mc.interfaces, &mc.interfaces_size,
2304
interface);
2305
interface = NULL;
2306
}
2307
}
2308
break;
2309
}
2310
2174
bool interface_was_up = interface_is_up(interface);
2311
errno = bring_up_interface(interface, delay);
2175
ret = bring_up_interface(interface, delay);
2312
2176
if(not interface_was_up){
2313
if(errno != 0){
2177
if(ret != 0){
2178
errno = ret;
2314
2179
perror_plus("Failed to bring up interface");
2315
2180
} else {
2316
errno = argz_add(&interfaces_to_take_down,
2317
&interfaces_to_take_down_size,
2318
interface);
2319
if(errno != 0){
2320
perror_plus("argz_add");
2321
}
2181
ret_errno = argz_add(&interfaces_to_take_down,
2182
&interfaces_to_take_down_size,
2183
interface);
2322
2184
}
2323
2185
}
2324
2186
}
2187
free(mc.interfaces);
2188
mc.interfaces = NULL;
2189
mc.interfaces_size = 0;
2325
2190
if(debug and (interfaces_to_take_down == NULL)){
2326
2191
fprintf_plus(stderr, "No interfaces were brought up\n");
2327
2192
}
2328
2193
}
2329
2194
2330
/* If we only got one interface, explicitly use only that one */
2331
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
2332
if(debug){
2333
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2334
mc.interfaces);
2335
}
2336
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
2337
}
2338
2339
2195
if(quit_now){
2340
2196
goto end;
2341
2197
}
2353
2209
goto end;
2354
2210
}
2355
2211
2356
/* Try /run/tmp before /tmp */
2357
tempdir = mkdtemp(run_tempdir);
2358
if(tempdir == NULL and errno == ENOENT){
2359
if(debug){
2360
fprintf_plus(stderr, "Tempdir %s did not work, trying %s\n",
2361
run_tempdir, old_tempdir);
2362
}
2363
tempdir = mkdtemp(old_tempdir);
2364
}
2365
if(tempdir == NULL){
2212
if(mkdtemp(tempdir) == NULL){
2366
2213
perror_plus("mkdtemp");
2367
2214
goto end;
2368
2215
}
2216
tempdir_created = true;
2369
2217
2370
2218
if(quit_now){
2371
2219
goto end;
2407
2255
exitcode = EX_USAGE;
2408
2256
goto end;
2409
2257
}
2410
2258
2411
2259
if(quit_now){
2412
2260
goto end;
2413
2261
}
2443
2291
fprintf_plus(stderr, "Retrying in %d seconds\n",
2444
2292
(int)retry_interval);
2445
2293
}
2446
sleep((unsigned int)retry_interval);
2294
sleep((int)retry_interval);
2447
2295
}
2448
2296
2449
if(not quit_now){
2297
if (not quit_now){
2450
2298
exitcode = EXIT_SUCCESS;
2451
2299
}
2452
2300
2507
2355
if(debug){
2508
2356
fprintf_plus(stderr, "Starting Avahi loop search\n");
2509
2357
}
2510
2358
2511
2359
ret = avahi_loop_with_timeout(simple_poll,
2512
2360
(int)(retry_interval * 1000), &mc);
2513
2361
if(debug){
2522
2370
}
2523
2371
2524
2372
/* Cleanup things */
2525
free(mc.interfaces);
2526
2527
2373
if(sb != NULL)
2528
2374
avahi_s_service_browser_free(sb);
2529
2375
2554
2400
}
2555
2401
}
2556
2402
2557
/* Re-raise privileges */
2403
/* Re-raise priviliges */
2558
2404
{
2559
ret_errno = raise_privileges();
2560
if(ret_errno != 0){
2561
errno = ret_errno;
2562
perror_plus("Failed to raise privileges");
2563
} else {
2564
2565
/* Run network hooks */
2566
run_network_hooks("stop", interfaces_hooks != NULL ?
2567
interfaces_hooks : "", delay);
2568
2569
/* Take down the network interfaces which were brought up */
2570
{
2571
char *interface = NULL;
2572
while((interface=argz_next(interfaces_to_take_down,
2573
interfaces_to_take_down_size,
2574
interface))){
2575
ret_errno = take_down_interface(interface);
2576
if(ret_errno != 0){
2577
errno = ret_errno;
2578
perror_plus("Failed to take down interface");
2579
}
2580
}
2581
if(debug and (interfaces_to_take_down == NULL)){
2582
fprintf_plus(stderr, "No interfaces needed to be taken"
2583
" down\n");
2584
}
2585
}
2586
}
2587
2588
ret_errno = lower_privileges_permanently();
2589
if(ret_errno != 0){
2590
errno = ret_errno;
2591
perror_plus("Failed to lower privileges permanently");
2592
}
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();
2593
2430
}
2594
2431
2595
2432
free(interfaces_to_take_down);
2596
2433
free(interfaces_hooks);
2597
2434
2598
2435
/* Removes the GPGME temp directory and all files inside */
2599
if(tempdir != NULL){
2436
if(tempdir_created){
2600
2437
struct dirent **direntries = NULL;
2601
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY |
2602
O_NOFOLLOW));
2603
if(tempdir_fd == -1){
2604
perror_plus("open");
2605
} else {
2606
#ifdef __GLIBC__
2607
#if __GLIBC_PREREQ(2, 15)
2608
int numentries = scandirat(tempdir_fd, ".", &direntries,
2609
notdotentries, alphasort);
2610
#else /* not __GLIBC_PREREQ(2, 15) */
2611
int numentries = scandir(tempdir, &direntries, notdotentries,
2612
alphasort);
2613
#endif /* not __GLIBC_PREREQ(2, 15) */
2614
#else /* not __GLIBC__ */
2615
int numentries = scandir(tempdir, &direntries, notdotentries,
2616
alphasort);
2617
#endif /* not __GLIBC__ */
2618
if(numentries >= 0){
2619
for(int i = 0; i < numentries; i++){
2620
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
2621
if(ret == -1){
2622
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
2623
" \"%s\", 0): %s\n", tempdir,
2624
direntries[i]->d_name, strerror(errno));
2625
}
2626
}
2627
2628
/* need to clean even if 0 because man page doesn't specify */
2629
free(direntries);
2630
if(numentries == -1){
2631
perror_plus("scandir");
2632
}
2633
ret = rmdir(tempdir);
2634
if(ret == -1 and errno != ENOENT){
2635
perror_plus("rmdir");
2636
}
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);
2637
2457
}
2638
TEMP_FAILURE_RETRY(close(tempdir_fd));
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");
2639
2468
}
2640
2469
}
2641
2470
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0