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- 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;
236
224
perror_plus("strdup");
237
225
return false;
238
226
}
239
ret = clock_gettime(CLOCK_MONOTONIC, &(new_server->last_seen));
240
if(ret == -1){
241
perror_plus("clock_gettime");
242
return false;
243
}
244
227
/* Special case of first server */
245
228
if(*current_server == NULL){
246
229
new_server->next = new_server;
247
230
new_server->prev = new_server;
248
231
*current_server = new_server;
232
/* Place the new server last in the list */
249
233
} else {
250
/* Place the new server last in the list */
251
234
new_server->next = *current_server;
252
235
new_server->prev = (*current_server)->prev;
253
236
new_server->prev->next = new_server;
254
237
(*current_server)->prev = new_server;
255
238
}
239
ret = clock_gettime(CLOCK_MONOTONIC, &(*current_server)->last_seen);
240
if(ret == -1){
241
perror_plus("clock_gettime");
242
return false;
243
}
256
244
return true;
257
245
}
258
246
259
247
/*
260
248
* Initialize GPGME.
261
249
*/
262
__attribute__((nonnull, warn_unused_result))
263
static bool init_gpgme(const char * const seckey,
264
const char * const pubkey,
265
const char * const tempdir,
266
mandos_context *mc){
250
static bool init_gpgme(const char *seckey, const char *pubkey,
251
const char *tempdir, mandos_context *mc){
267
252
gpgme_error_t rc;
268
253
gpgme_engine_info_t engine_info;
269
254
270
255
/*
271
256
* Helper function to insert pub and seckey to the engine keyring.
272
257
*/
273
bool import_key(const char * const filename){
258
bool import_key(const char *filename){
274
259
int ret;
275
260
int fd;
276
261
gpgme_data_t pgp_data;
357
342
* Decrypt OpenPGP data.
358
343
* Returns -1 on error
359
344
*/
360
__attribute__((nonnull, warn_unused_result))
361
345
static ssize_t pgp_packet_decrypt(const char *cryptotext,
362
346
size_t crypto_size,
363
347
char **plaintext,
483
467
return plaintext_length;
484
468
}
485
469
486
__attribute__((warn_unused_result))
487
static const char *safer_gnutls_strerror(int value){
470
static const char * safer_gnutls_strerror(int value){
488
471
const char *ret = gnutls_strerror(value);
489
472
if(ret == NULL)
490
473
ret = "(unknown)";
492
475
}
493
476
494
477
/* GnuTLS log function callback */
495
__attribute__((nonnull))
496
478
static void debuggnutls(__attribute__((unused)) int level,
497
479
const char* string){
498
480
fprintf_plus(stderr, "GnuTLS: %s", string);
499
481
}
500
482
501
__attribute__((nonnull, warn_unused_result))
502
483
static int init_gnutls_global(const char *pubkeyfilename,
503
484
const char *seckeyfilename,
504
485
mandos_context *mc){
578
559
return -1;
579
560
}
580
561
581
__attribute__((nonnull, warn_unused_result))
582
562
static int init_gnutls_session(gnutls_session_t *session,
583
563
mandos_context *mc){
584
564
int ret;
641
621
__attribute__((unused)) const char *txt){}
642
622
643
623
/* Called when a Mandos server is found */
644
__attribute__((nonnull, warn_unused_result))
645
624
static int start_mandos_communication(const char *ip, in_port_t port,
646
625
AvahiIfIndex if_index,
647
626
int af, mandos_context *mc){
648
627
int ret, tcp_sd = -1;
649
628
ssize_t sret;
650
struct sockaddr_storage to;
629
union {
630
struct sockaddr_in in;
631
struct sockaddr_in6 in6;
632
} to;
651
633
char *buffer = NULL;
652
634
char *decrypted_buffer = NULL;
653
635
size_t buffer_length = 0;
677
659
return -1;
678
660
}
679
661
680
/* If the interface is specified and we have a list of interfaces */
681
if(if_index != AVAHI_IF_UNSPEC and mc->interfaces != NULL){
682
/* Check if the interface is one of the interfaces we are using */
683
bool match = false;
684
{
685
char *interface = NULL;
686
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
687
interface))){
688
if(if_nametoindex(interface) == (unsigned int)if_index){
689
match = true;
690
break;
691
}
692
}
693
}
694
if(not match){
695
/* This interface does not match any in the list, so we don't
696
connect to the server */
697
if(debug){
698
char interface[IF_NAMESIZE];
699
if(if_indextoname((unsigned int)if_index, interface) == NULL){
700
perror_plus("if_indextoname");
701
} else {
702
fprintf_plus(stderr, "Skipping server on non-used interface"
703
" \"%s\"\n",
704
if_indextoname((unsigned int)if_index,
705
interface));
706
}
707
}
708
return -1;
709
}
710
}
711
712
662
ret = init_gnutls_session(&session, mc);
713
663
if(ret != 0){
714
664
return -1;
734
684
735
685
memset(&to, 0, sizeof(to));
736
686
if(af == AF_INET6){
737
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
738
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);
739
689
} else { /* IPv4 */
740
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
741
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);
742
692
}
743
693
if(ret < 0 ){
744
694
int e = errno;
753
703
goto mandos_end;
754
704
}
755
705
if(af == AF_INET6){
756
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
757
if(IN6_IS_ADDR_LINKLOCAL
758
(&((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*/
759
710
if(if_index == AVAHI_IF_UNSPEC){
760
711
fprintf_plus(stderr, "An IPv6 link-local address is"
761
712
" incomplete without a network interface\n");
763
714
goto mandos_end;
764
715
}
765
716
/* Set the network interface number as scope */
766
((struct sockaddr_in6 *)&to)->sin6_scope_id = (uint32_t)if_index;
717
to.in6.sin6_scope_id = (uint32_t)if_index;
767
718
}
768
719
} else {
769
((struct sockaddr_in *)&to)->sin_port = htons(port);
720
to.in.sin_port = htons(port); /* Spurious warnings from
721
-Wconversion and
722
-Wunreachable-code */
770
723
}
771
724
772
725
if(quit_now){
789
742
}
790
743
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
791
744
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
745
const char *pcret;
792
746
if(af == AF_INET6){
793
ret = getnameinfo((struct sockaddr *)&to,
794
sizeof(struct sockaddr_in6),
795
addrstr, sizeof(addrstr), NULL, 0,
796
NI_NUMERICHOST);
747
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
748
sizeof(addrstr));
797
749
} else {
798
ret = getnameinfo((struct sockaddr *)&to,
799
sizeof(struct sockaddr_in),
800
addrstr, sizeof(addrstr), NULL, 0,
801
NI_NUMERICHOST);
750
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
751
sizeof(addrstr));
802
752
}
803
if(ret == EAI_SYSTEM){
804
perror_plus("getnameinfo");
805
} else if(ret != 0) {
806
fprintf_plus(stderr, "getnameinfo: %s", gai_strerror(ret));
807
} else if(strcmp(addrstr, ip) != 0){
808
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
}
809
759
}
810
760
}
811
761
815
765
}
816
766
817
767
if(af == AF_INET6){
818
ret = connect(tcp_sd, (struct sockaddr *)&to,
819
sizeof(struct sockaddr_in6));
768
ret = connect(tcp_sd, &to.in6, sizeof(to));
820
769
} else {
821
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
822
sizeof(struct sockaddr_in));
770
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
823
771
}
824
772
if(ret < 0){
825
if((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
773
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
826
774
int e = errno;
827
775
perror_plus("connect");
828
776
errno = e;
1043
991
return retval;
1044
992
}
1045
993
1046
__attribute__((nonnull))
1047
994
static void resolve_callback(AvahiSServiceResolver *r,
1048
995
AvahiIfIndex interface,
1049
996
AvahiProtocol proto,
1057
1004
AVAHI_GCC_UNUSED AvahiStringList *txt,
1058
1005
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1059
1006
flags,
1060
void *mc){
1007
void* mc){
1061
1008
if(r == NULL){
1062
1009
return;
1063
1010
}
1116
1063
const char *domain,
1117
1064
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1118
1065
flags,
1119
void *mc){
1066
void* mc){
1120
1067
if(b == NULL){
1121
1068
return;
1122
1069
}
1182
1129
errno = old_errno;
1183
1130
}
1184
1131
1185
__attribute__((nonnull, warn_unused_result))
1186
1132
bool get_flags(const char *ifname, struct ifreq *ifr){
1187
1133
int ret;
1188
1134
error_t ret_errno;
1207
1153
return true;
1208
1154
}
1209
1155
1210
__attribute__((nonnull, warn_unused_result))
1211
1156
bool good_flags(const char *ifname, const struct ifreq *ifr){
1212
1157
1213
1158
/* Reject the loopback device */
1255
1200
* corresponds to an acceptable network device.
1256
1201
* (This function is passed to scandir(3) as a filter function.)
1257
1202
*/
1258
__attribute__((nonnull, warn_unused_result))
1259
1203
int good_interface(const struct dirent *if_entry){
1260
1204
if(if_entry->d_name[0] == '.'){
1261
1205
return 0;
1279
1223
/*
1280
1224
* This function determines if a network interface is up.
1281
1225
*/
1282
__attribute__((nonnull, warn_unused_result))
1283
1226
bool interface_is_up(const char *interface){
1284
1227
struct ifreq ifr;
1285
1228
if(not get_flags(interface, &ifr)){
1296
1239
/*
1297
1240
* This function determines if a network interface is running
1298
1241
*/
1299
__attribute__((nonnull, warn_unused_result))
1300
1242
bool interface_is_running(const char *interface){
1301
1243
struct ifreq ifr;
1302
1244
if(not get_flags(interface, &ifr)){
1310
1252
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1311
1253
}
1312
1254
1313
__attribute__((nonnull, pure, warn_unused_result))
1314
1255
int notdotentries(const struct dirent *direntry){
1315
1256
/* Skip "." and ".." */
1316
1257
if(direntry->d_name[0] == '.'
1323
1264
}
1324
1265
1325
1266
/* Is this directory entry a runnable program? */
1326
__attribute__((nonnull, warn_unused_result))
1327
1267
int runnable_hook(const struct dirent *direntry){
1328
1268
int ret;
1329
1269
size_t sret;
1337
1277
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1338
1278
"abcdefghijklmnopqrstuvwxyz"
1339
1279
"0123456789"
1340
"_.-");
1280
"_-");
1341
1281
if((direntry->d_name)[sret] != '\0'){
1342
1282
/* Contains non-allowed characters */
1343
1283
if(debug){
1347
1287
return 0;
1348
1288
}
1349
1289
1350
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);
1351
1298
if(ret == -1){
1352
1299
if(debug){
1353
1300
perror_plus("Could not stat hook");
1377
1324
return 1;
1378
1325
}
1379
1326
1380
__attribute__((nonnull, warn_unused_result))
1381
1327
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1382
1328
mandos_context *mc){
1383
1329
int ret;
1387
1333
1388
1334
while(true){
1389
1335
if(mc->current_server == NULL){
1390
if(debug){
1336
if (debug){
1391
1337
fprintf_plus(stderr, "Wait until first server is found."
1392
1338
" No timeout!\n");
1393
1339
}
1394
1340
ret = avahi_simple_poll_iterate(s, -1);
1395
1341
} else {
1396
if(debug){
1342
if (debug){
1397
1343
fprintf_plus(stderr, "Check current_server if we should run"
1398
1344
" it, or wait\n");
1399
1345
}
1416
1362
- ((intmax_t)waited_time.tv_sec * 1000))
1417
1363
- ((intmax_t)waited_time.tv_nsec / 1000000));
1418
1364
1419
if(debug){
1365
if (debug){
1420
1366
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1421
1367
block_time);
1422
1368
}
1444
1390
ret = avahi_simple_poll_iterate(s, (int)block_time);
1445
1391
}
1446
1392
if(ret != 0){
1447
if(ret > 0 or errno != EINTR){
1393
if (ret > 0 or errno != EINTR){
1448
1394
return (ret != 1) ? ret : 0;
1449
1395
}
1450
1396
}
1452
1398
}
1453
1399
1454
1400
/* Set effective uid to 0, return errno */
1455
__attribute__((warn_unused_result))
1456
1401
error_t raise_privileges(void){
1457
1402
error_t old_errno = errno;
1458
1403
error_t ret_errno = 0;
1459
1404
if(seteuid(0) == -1){
1460
1405
ret_errno = errno;
1406
perror_plus("seteuid");
1461
1407
}
1462
1408
errno = old_errno;
1463
1409
return ret_errno;
1464
1410
}
1465
1411
1466
1412
/* Set effective and real user ID to 0. Return errno. */
1467
__attribute__((warn_unused_result))
1468
1413
error_t raise_privileges_permanently(void){
1469
1414
error_t old_errno = errno;
1470
1415
error_t ret_errno = raise_privileges();
1474
1419
}
1475
1420
if(setuid(0) == -1){
1476
1421
ret_errno = errno;
1422
perror_plus("seteuid");
1477
1423
}
1478
1424
errno = old_errno;
1479
1425
return ret_errno;
1480
1426
}
1481
1427
1482
1428
/* Set effective user ID to unprivileged saved user ID */
1483
__attribute__((warn_unused_result))
1484
1429
error_t lower_privileges(void){
1485
1430
error_t old_errno = errno;
1486
1431
error_t ret_errno = 0;
1487
1432
if(seteuid(uid) == -1){
1488
1433
ret_errno = errno;
1434
perror_plus("seteuid");
1489
1435
}
1490
1436
errno = old_errno;
1491
1437
return ret_errno;
1492
1438
}
1493
1439
1494
1440
/* Lower privileges permanently */
1495
__attribute__((warn_unused_result))
1496
1441
error_t lower_privileges_permanently(void){
1497
1442
error_t old_errno = errno;
1498
1443
error_t ret_errno = 0;
1499
1444
if(setuid(uid) == -1){
1500
1445
ret_errno = errno;
1446
perror_plus("setuid");
1501
1447
}
1502
1448
errno = old_errno;
1503
1449
return ret_errno;
1504
1450
}
1505
1451
1506
__attribute__((nonnull))
1507
void run_network_hooks(const char *mode, const char *interface,
1452
bool run_network_hooks(const char *mode, const char *interface,
1508
1453
const float delay){
1509
struct dirent **direntries = NULL;
1510
if(hookdir_fd == -1){
1511
hookdir_fd = open(hookdir, O_RDONLY);
1512
if(hookdir_fd == -1){
1513
if(errno == ENOENT){
1514
if(debug){
1515
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1516
" found\n", hookdir);
1517
}
1518
} else {
1519
perror_plus("open");
1520
}
1521
return;
1522
}
1523
}
1524
#ifdef __GLIBC__
1525
#if __GLIBC_PREREQ(2, 15)
1526
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1527
runnable_hook, alphasort);
1528
#else /* not __GLIBC_PREREQ(2, 15) */
1529
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1530
alphasort);
1531
#endif /* not __GLIBC_PREREQ(2, 15) */
1532
#else /* not __GLIBC__ */
1533
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1534
alphasort);
1535
#endif /* not __GLIBC__ */
1454
struct dirent **direntries;
1455
struct dirent *direntry;
1456
int ret;
1457
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1458
alphasort);
1536
1459
if(numhooks == -1){
1537
perror_plus("scandir");
1538
return;
1539
}
1540
struct dirent *direntry;
1541
int ret;
1542
int devnull = open("/dev/null", O_RDONLY);
1543
for(int i = 0; i < numhooks; i++){
1544
direntry = direntries[i];
1545
if(debug){
1546
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1547
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");
1548
1467
}
1549
pid_t hook_pid = fork();
1550
if(hook_pid == 0){
1551
/* Child */
1552
/* Raise privileges */
1553
errno = raise_privileges_permanently();
1554
if(errno != 0){
1555
perror_plus("Failed to raise privileges");
1556
_exit(EX_NOPERM);
1557
}
1558
/* Set group */
1559
errno = 0;
1560
ret = setgid(0);
1561
if(ret == -1){
1562
perror_plus("setgid");
1563
_exit(EX_NOPERM);
1564
}
1565
/* Reset supplementary groups */
1566
errno = 0;
1567
ret = setgroups(0, NULL);
1568
if(ret == -1){
1569
perror_plus("setgroups");
1570
_exit(EX_NOPERM);
1571
}
1572
ret = dup2(devnull, STDIN_FILENO);
1573
if(ret == -1){
1574
perror_plus("dup2(devnull, STDIN_FILENO)");
1575
_exit(EX_OSERR);
1576
}
1577
ret = close(devnull);
1578
if(ret == -1){
1579
perror_plus("close");
1580
_exit(EX_OSERR);
1581
}
1582
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1583
if(ret == -1){
1584
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1585
_exit(EX_OSERR);
1586
}
1587
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1588
if(ret == -1){
1589
perror_plus("setenv");
1590
_exit(EX_OSERR);
1591
}
1592
ret = setenv("DEVICE", interface, 1);
1593
if(ret == -1){
1594
perror_plus("setenv");
1595
_exit(EX_OSERR);
1596
}
1597
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1598
if(ret == -1){
1599
perror_plus("setenv");
1600
_exit(EX_OSERR);
1601
}
1602
ret = setenv("MODE", mode, 1);
1603
if(ret == -1){
1604
perror_plus("setenv");
1605
_exit(EX_OSERR);
1606
}
1607
char *delaystring;
1608
ret = asprintf(&delaystring, "%f", (double)delay);
1609
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){
1610
1475
perror_plus("asprintf");
1611
_exit(EX_OSERR);
1612
}
1613
ret = setenv("DELAY", delaystring, 1);
1614
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
}
1615
1534
free(delaystring);
1616
perror_plus("setenv");
1617
_exit(EX_OSERR);
1618
}
1619
free(delaystring);
1620
if(connect_to != NULL){
1621
ret = setenv("CONNECT", connect_to, 1);
1622
if(ret == -1){
1623
perror_plus("setenv");
1624
_exit(EX_OSERR);
1625
}
1626
}
1627
int hook_fd = openat(hookdir_fd, direntry->d_name, O_RDONLY);
1628
if(hook_fd == -1){
1629
perror_plus("openat");
1630
_exit(EXIT_FAILURE);
1631
}
1632
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1633
perror_plus("close");
1634
_exit(EXIT_FAILURE);
1635
}
1636
if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },
1637
environ) == -1){
1638
perror_plus("fexecve");
1639
_exit(EXIT_FAILURE);
1640
}
1641
} else {
1642
int status;
1643
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1644
perror_plus("waitpid");
1645
continue;
1646
}
1647
if(WIFEXITED(status)){
1648
if(WEXITSTATUS(status) != 0){
1649
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1650
" with status %d\n", direntry->d_name,
1651
WEXITSTATUS(status));
1652
continue;
1653
}
1654
} else if(WIFSIGNALED(status)){
1655
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1656
" signal %d\n", direntry->d_name,
1657
WTERMSIG(status));
1658
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
}
1659
1546
} else {
1660
fprintf_plus(stderr, "Warning: network hook \"%s\""
1661
" crashed\n", direntry->d_name);
1662
continue;
1663
}
1664
}
1665
if(debug){
1666
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1667
direntry->d_name);
1668
}
1669
}
1670
free(direntries);
1671
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1672
perror_plus("close");
1673
} else {
1674
hookdir_fd = -1;
1675
}
1676
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;
1677
1583
}
1678
1584
1679
__attribute__((nonnull, warn_unused_result))
1680
1585
error_t bring_up_interface(const char *const interface,
1681
1586
const float delay){
1587
int sd = -1;
1682
1588
error_t old_errno = errno;
1683
int ret;
1589
error_t ret_errno = 0;
1590
int ret, ret_setflags;
1684
1591
struct ifreq network;
1685
1592
unsigned int if_index = if_nametoindex(interface);
1686
1593
if(if_index == 0){
1695
1602
}
1696
1603
1697
1604
if(not interface_is_up(interface)){
1698
error_t ret_errno = 0, ioctl_errno = 0;
1699
if(not get_flags(interface, &network)){
1605
if(not get_flags(interface, &network) and debug){
1700
1606
ret_errno = errno;
1701
1607
fprintf_plus(stderr, "Failed to get flags for interface "
1702
1608
"\"%s\"\n", interface);
1703
errno = old_errno;
1704
1609
return ret_errno;
1705
1610
}
1706
network.ifr_flags |= IFF_UP; /* set flag */
1611
network.ifr_flags |= IFF_UP;
1707
1612
1708
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1709
if(sd == -1){
1613
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1614
if(sd < 0){
1710
1615
ret_errno = errno;
1711
1616
perror_plus("socket");
1712
1617
errno = old_errno;
1713
1618
return ret_errno;
1714
1619
}
1715
1620
1716
1621
if(quit_now){
1717
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1718
if(ret == -1){
1719
perror_plus("close");
1720
}
1622
close(sd);
1721
1623
errno = old_errno;
1722
1624
return EINTR;
1723
1625
}
1727
1629
interface);
1728
1630
}
1729
1631
1730
/* Raise privileges */
1731
ret_errno = raise_privileges();
1732
if(ret_errno != 0){
1733
errno = ret_errno;
1734
perror_plus("Failed to raise privileges");
1735
}
1632
/* Raise priviliges */
1633
raise_privileges();
1736
1634
1737
1635
#ifdef __linux__
1738
int ret_linux;
1739
bool restore_loglevel = false;
1740
if(ret_errno == 0){
1741
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1742
messages about the network interface to mess up the prompt */
1743
ret_linux = klogctl(8, NULL, 5);
1744
if(ret_linux == -1){
1745
perror_plus("klogctl");
1746
} else {
1747
restore_loglevel = true;
1748
}
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");
1749
1643
}
1750
1644
#endif /* __linux__ */
1751
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1752
ioctl_errno = errno;
1645
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1646
ret_errno = errno;
1753
1647
#ifdef __linux__
1754
1648
if(restore_loglevel){
1755
1649
ret_linux = klogctl(7, NULL, 0);
1759
1653
}
1760
1654
#endif /* __linux__ */
1761
1655
1762
/* If raise_privileges() succeeded above */
1763
if(ret_errno == 0){
1764
/* Lower privileges */
1765
ret_errno = lower_privileges();
1766
if(ret_errno != 0){
1767
errno = ret_errno;
1768
perror_plus("Failed to lower privileges");
1769
}
1770
}
1656
/* Lower privileges */
1657
lower_privileges();
1771
1658
1772
1659
/* Close the socket */
1773
1660
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1776
1663
}
1777
1664
1778
1665
if(ret_setflags == -1){
1779
errno = ioctl_errno;
1666
errno = ret_errno;
1780
1667
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1781
1668
errno = old_errno;
1782
return ioctl_errno;
1669
return ret_errno;
1783
1670
}
1784
1671
} else if(debug){
1785
1672
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1803
1690
return 0;
1804
1691
}
1805
1692
1806
__attribute__((nonnull, warn_unused_result))
1807
1693
error_t take_down_interface(const char *const interface){
1694
int sd = -1;
1808
1695
error_t old_errno = errno;
1696
error_t ret_errno = 0;
1697
int ret, ret_setflags;
1809
1698
struct ifreq network;
1810
1699
unsigned int if_index = if_nametoindex(interface);
1811
1700
if(if_index == 0){
1814
1703
return ENXIO;
1815
1704
}
1816
1705
if(interface_is_up(interface)){
1817
error_t ret_errno = 0, ioctl_errno = 0;
1818
1706
if(not get_flags(interface, &network) and debug){
1819
1707
ret_errno = errno;
1820
1708
fprintf_plus(stderr, "Failed to get flags for interface "
1821
1709
"\"%s\"\n", interface);
1822
errno = old_errno;
1823
1710
return ret_errno;
1824
1711
}
1825
1712
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1826
1713
1827
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1828
if(sd == -1){
1714
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1715
if(sd < 0){
1829
1716
ret_errno = errno;
1830
1717
perror_plus("socket");
1831
1718
errno = old_errno;
1837
1724
interface);
1838
1725
}
1839
1726
1840
/* Raise privileges */
1841
ret_errno = raise_privileges();
1842
if(ret_errno != 0){
1843
errno = ret_errno;
1844
perror_plus("Failed to raise privileges");
1845
}
1846
1847
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1848
ioctl_errno = errno;
1849
1850
/* If raise_privileges() succeeded above */
1851
if(ret_errno == 0){
1852
/* Lower privileges */
1853
ret_errno = lower_privileges();
1854
if(ret_errno != 0){
1855
errno = ret_errno;
1856
perror_plus("Failed to lower privileges");
1857
}
1858
}
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();
1859
1735
1860
1736
/* Close the socket */
1861
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
1737
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1862
1738
if(ret == -1){
1863
1739
perror_plus("close");
1864
1740
}
1865
1741
1866
1742
if(ret_setflags == -1){
1867
errno = ioctl_errno;
1743
errno = ret_errno;
1868
1744
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1869
1745
errno = old_errno;
1870
return ioctl_errno;
1746
return ret_errno;
1871
1747
}
1872
1748
} else if(debug){
1873
1749
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1881
1757
int main(int argc, char *argv[]){
1882
1758
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1883
1759
.priority = "SECURE256:!CTYPE-X.509:"
1884
"+CTYPE-OPENPGP", .current_server = NULL,
1760
"+CTYPE-OPENPGP", .current_server = NULL,
1885
1761
.interfaces = NULL, .interfaces_size = 0 };
1886
1762
AvahiSServiceBrowser *sb = NULL;
1887
1763
error_t ret_errno;
1891
1767
int exitcode = EXIT_SUCCESS;
1892
1768
char *interfaces_to_take_down = NULL;
1893
1769
size_t interfaces_to_take_down_size = 0;
1894
char run_tempdir[] = "/run/tmp/mandosXXXXXX";
1895
char old_tempdir[] = "/tmp/mandosXXXXXX";
1896
char *tempdir = NULL;
1770
char tempdir[] = "/tmp/mandosXXXXXX";
1771
bool tempdir_created = false;
1897
1772
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1898
1773
const char *seckey = PATHDIR "/" SECKEY;
1899
1774
const char *pubkey = PATHDIR "/" PUBKEY;
1900
1775
char *interfaces_hooks = NULL;
1776
size_t interfaces_hooks_size = 0;
1901
1777
1902
1778
bool gnutls_initialized = false;
1903
1779
bool gpgme_initialized = false;
2081
1957
/* Work around Debian bug #633582:
2082
1958
<http://bugs.debian.org/633582> */
2083
1959
2084
/* Re-raise privileges */
2085
ret_errno = raise_privileges();
2086
if(ret_errno != 0){
2087
errno = ret_errno;
2088
perror_plus("Failed to raise privileges");
2089
} else {
1960
/* Re-raise priviliges */
1961
if(raise_privileges() == 0){
2090
1962
struct stat st;
2091
1963
2092
1964
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2132
2004
}
2133
2005
2134
2006
/* Lower privileges */
2135
ret_errno = lower_privileges();
2136
if(ret_errno != 0){
2137
errno = ret_errno;
2138
perror_plus("Failed to lower privileges");
2007
errno = 0;
2008
ret = seteuid(uid);
2009
if(ret == -1){
2010
perror_plus("seteuid");
2139
2011
}
2140
2012
}
2141
2013
}
2142
2014
2143
/* Remove invalid interface names (except "none") */
2015
/* Remove empty interface names */
2144
2016
{
2145
2017
char *interface = NULL;
2146
2018
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2147
2019
interface))){
2148
if(strcmp(interface, "none") != 0
2149
and if_nametoindex(interface) == 0){
2150
if(interface[0] != '\0'){
2020
if(if_nametoindex(interface) == 0){
2021
if(interface[0] != '\0' and strcmp(interface, "none") != 0){
2151
2022
fprintf_plus(stderr, "Not using nonexisting interface"
2152
2023
" \"%s\"\n", interface);
2153
2024
}
2159
2030
2160
2031
/* Run network hooks */
2161
2032
{
2033
2162
2034
if(mc.interfaces != NULL){
2163
2035
interfaces_hooks = malloc(mc.interfaces_size);
2164
2036
if(interfaces_hooks == NULL){
2166
2038
goto end;
2167
2039
}
2168
2040
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2169
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2170
}
2171
run_network_hooks("start", interfaces_hooks != NULL ?
2172
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
}
2173
2049
}
2174
2050
2175
2051
if(not debug){
2253
2129
2254
2130
/* If no interfaces were specified, make a list */
2255
2131
if(mc.interfaces == NULL){
2256
struct dirent **direntries = NULL;
2132
struct dirent **direntries;
2257
2133
/* Look for any good interfaces */
2258
2134
ret = scandir(sys_class_net, &direntries, good_interface,
2259
2135
alphasort);
2263
2139
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2264
2140
direntries[i]->d_name);
2265
2141
if(ret_errno != 0){
2266
errno = ret_errno;
2267
2142
perror_plus("argz_add");
2268
2143
continue;
2269
2144
}
2274
2149
}
2275
2150
free(direntries);
2276
2151
} else {
2277
if(ret == 0){
2278
free(direntries);
2279
}
2152
free(direntries);
2280
2153
fprintf_plus(stderr, "Could not find a network interface\n");
2281
2154
exitcode = EXIT_FAILURE;
2282
2155
goto end;
2283
2156
}
2284
2157
}
2285
2158
2286
/* Bring up interfaces which are down, and remove any "none"s */
2287
{
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)){
2288
2171
char *interface = NULL;
2289
2172
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2290
2173
interface))){
2291
/* If interface name is "none", stop bringing up interfaces.
2292
Also remove all instances of "none" from the list */
2293
if(strcmp(interface, "none") == 0){
2294
argz_delete(&mc.interfaces, &mc.interfaces_size,
2295
interface);
2296
interface = NULL;
2297
while((interface = argz_next(mc.interfaces,
2298
mc.interfaces_size, interface))){
2299
if(strcmp(interface, "none") == 0){
2300
argz_delete(&mc.interfaces, &mc.interfaces_size,
2301
interface);
2302
interface = NULL;
2303
}
2304
}
2305
break;
2306
}
2307
2174
bool interface_was_up = interface_is_up(interface);
2308
errno = bring_up_interface(interface, delay);
2175
ret = bring_up_interface(interface, delay);
2309
2176
if(not interface_was_up){
2310
if(errno != 0){
2177
if(ret != 0){
2178
errno = ret;
2311
2179
perror_plus("Failed to bring up interface");
2312
2180
} else {
2313
errno = argz_add(&interfaces_to_take_down,
2314
&interfaces_to_take_down_size,
2315
interface);
2316
if(errno != 0){
2317
perror_plus("argz_add");
2318
}
2181
ret_errno = argz_add(&interfaces_to_take_down,
2182
&interfaces_to_take_down_size,
2183
interface);
2319
2184
}
2320
2185
}
2321
2186
}
2187
free(mc.interfaces);
2188
mc.interfaces = NULL;
2189
mc.interfaces_size = 0;
2322
2190
if(debug and (interfaces_to_take_down == NULL)){
2323
2191
fprintf_plus(stderr, "No interfaces were brought up\n");
2324
2192
}
2325
2193
}
2326
2194
2327
/* If we only got one interface, explicitly use only that one */
2328
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
2329
if(debug){
2330
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2331
mc.interfaces);
2332
}
2333
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
2334
}
2335
2336
2195
if(quit_now){
2337
2196
goto end;
2338
2197
}
2350
2209
goto end;
2351
2210
}
2352
2211
2353
/* Try /run/tmp before /tmp */
2354
tempdir = mkdtemp(run_tempdir);
2355
if(tempdir == NULL and errno == ENOENT){
2356
if(debug){
2357
fprintf_plus(stderr, "Tempdir %s did not work, trying %s\n",
2358
run_tempdir, old_tempdir);
2359
}
2360
tempdir = mkdtemp(old_tempdir);
2361
}
2362
if(tempdir == NULL){
2212
if(mkdtemp(tempdir) == NULL){
2363
2213
perror_plus("mkdtemp");
2364
2214
goto end;
2365
2215
}
2216
tempdir_created = true;
2366
2217
2367
2218
if(quit_now){
2368
2219
goto end;
2404
2255
exitcode = EX_USAGE;
2405
2256
goto end;
2406
2257
}
2407
2258
2408
2259
if(quit_now){
2409
2260
goto end;
2410
2261
}
2440
2291
fprintf_plus(stderr, "Retrying in %d seconds\n",
2441
2292
(int)retry_interval);
2442
2293
}
2443
sleep((unsigned int)retry_interval);
2294
sleep((int)retry_interval);
2444
2295
}
2445
2296
2446
if(not quit_now){
2297
if (not quit_now){
2447
2298
exitcode = EXIT_SUCCESS;
2448
2299
}
2449
2300
2504
2355
if(debug){
2505
2356
fprintf_plus(stderr, "Starting Avahi loop search\n");
2506
2357
}
2507
2358
2508
2359
ret = avahi_loop_with_timeout(simple_poll,
2509
2360
(int)(retry_interval * 1000), &mc);
2510
2361
if(debug){
2519
2370
}
2520
2371
2521
2372
/* Cleanup things */
2522
free(mc.interfaces);
2523
2524
2373
if(sb != NULL)
2525
2374
avahi_s_service_browser_free(sb);
2526
2375
2551
2400
}
2552
2401
}
2553
2402
2554
/* Re-raise privileges */
2403
/* Re-raise priviliges */
2555
2404
{
2556
ret_errno = raise_privileges();
2557
if(ret_errno != 0){
2558
errno = ret_errno;
2559
perror_plus("Failed to raise privileges");
2560
} else {
2561
2562
/* Run network hooks */
2563
run_network_hooks("stop", interfaces_hooks != NULL ?
2564
interfaces_hooks : "", delay);
2565
2566
/* Take down the network interfaces which were brought up */
2567
{
2568
char *interface = NULL;
2569
while((interface=argz_next(interfaces_to_take_down,
2570
interfaces_to_take_down_size,
2571
interface))){
2572
ret_errno = take_down_interface(interface);
2573
if(ret_errno != 0){
2574
errno = ret_errno;
2575
perror_plus("Failed to take down interface");
2576
}
2577
}
2578
if(debug and (interfaces_to_take_down == NULL)){
2579
fprintf_plus(stderr, "No interfaces needed to be taken"
2580
" down\n");
2581
}
2582
}
2583
}
2584
2585
ret_errno = lower_privileges_permanently();
2586
if(ret_errno != 0){
2587
errno = ret_errno;
2588
perror_plus("Failed to lower privileges permanently");
2589
}
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();
2590
2430
}
2591
2431
2592
2432
free(interfaces_to_take_down);
2593
2433
free(interfaces_hooks);
2594
2434
2595
2435
/* Removes the GPGME temp directory and all files inside */
2596
if(tempdir != NULL){
2436
if(tempdir_created){
2597
2437
struct dirent **direntries = NULL;
2598
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY |
2599
O_NOFOLLOW));
2600
if(tempdir_fd == -1){
2601
perror_plus("open");
2602
} else {
2603
#ifdef __GLIBC__
2604
#if __GLIBC_PREREQ(2, 15)
2605
int numentries = scandirat(tempdir_fd, ".", &direntries,
2606
notdotentries, alphasort);
2607
#else /* not __GLIBC_PREREQ(2, 15) */
2608
int numentries = scandir(tempdir, &direntries, notdotentries,
2609
alphasort);
2610
#endif /* not __GLIBC_PREREQ(2, 15) */
2611
#else /* not __GLIBC__ */
2612
int numentries = scandir(tempdir, &direntries, notdotentries,
2613
alphasort);
2614
#endif /* not __GLIBC__ */
2615
if(numentries >= 0){
2616
for(int i = 0; i < numentries; i++){
2617
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
2618
if(ret == -1){
2619
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
2620
" \"%s\", 0): %s\n", tempdir,
2621
direntries[i]->d_name, strerror(errno));
2622
}
2623
}
2624
2625
/* need to clean even if 0 because man page doesn't specify */
2626
free(direntries);
2627
if(numentries == -1){
2628
perror_plus("scandir");
2629
}
2630
ret = rmdir(tempdir);
2631
if(ret == -1 and errno != ENOENT){
2632
perror_plus("rmdir");
2633
}
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);
2634
2457
}
2635
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");
2636
2468
}
2637
2469
}
2638
2470
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0