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- Committer: Teddy Hogeborn
- Date: 2014-07-14 10:03:10 UTC
- Revision ID: teddy@recompile.se-20140714100310-omqvn3mujflspggi
mandos.lsm: Fix white space.
- 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
161
166
const char *priority;
162
167
gpgme_ctx_t ctx;
163
168
server *current_server;
169
char *interfaces;
170
size_t interfaces_size;
164
171
} mandos_context;
165
172
166
173
/* global so signal handler can reach it*/
178
185
perror(print_text);
179
186
}
180
187
181
__attribute__((format (gnu_printf, 2, 3)))
188
__attribute__((format (gnu_printf, 2, 3), nonnull))
182
189
int fprintf_plus(FILE *stream, const char *format, ...){
183
190
va_list ap;
184
191
va_start (ap, format);
185
192
186
193
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
187
194
program_invocation_short_name));
188
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
195
return (int)TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
189
196
}
190
197
191
198
/*
193
200
* bytes. "buffer_capacity" is how much is currently allocated,
194
201
* "buffer_length" is how much is already used.
195
202
*/
203
__attribute__((nonnull, warn_unused_result))
196
204
size_t incbuffer(char **buffer, size_t buffer_length,
197
205
size_t buffer_capacity){
198
206
if(buffer_length + BUFFER_SIZE > buffer_capacity){
199
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
200
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;
201
213
return 0;
202
214
}
215
*buffer = new_buf;
203
216
buffer_capacity += BUFFER_SIZE;
204
217
}
205
218
return buffer_capacity;
206
219
}
207
220
208
221
/* Add server to set of servers to retry periodically */
222
__attribute__((nonnull, warn_unused_result))
209
223
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
210
224
int af, server **current_server){
211
225
int ret;
220
234
.af = af };
221
235
if(new_server->ip == NULL){
222
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
free(new_server->ip);
244
free(new_server);
223
245
return false;
224
246
}
225
247
/* Special case of first server */
227
249
new_server->next = new_server;
228
250
new_server->prev = new_server;
229
251
*current_server = new_server;
230
/* Place the new server last in the list */
231
252
} else {
253
/* Place the new server last in the list */
232
254
new_server->next = *current_server;
233
255
new_server->prev = (*current_server)->prev;
234
256
new_server->prev->next = new_server;
235
257
(*current_server)->prev = new_server;
236
258
}
237
ret = clock_gettime(CLOCK_MONOTONIC, &(*current_server)->last_seen);
238
if(ret == -1){
239
perror_plus("clock_gettime");
240
return false;
241
}
242
259
return true;
243
260
}
244
261
245
262
/*
246
263
* Initialize GPGME.
247
264
*/
248
static bool init_gpgme(const char *seckey, const char *pubkey,
249
const char *tempdir, mandos_context *mc){
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
270
gpgme_error_t rc;
251
271
gpgme_engine_info_t engine_info;
252
272
253
273
/*
254
274
* Helper function to insert pub and seckey to the engine keyring.
255
275
*/
256
bool import_key(const char *filename){
276
bool import_key(const char * const filename){
257
277
int ret;
258
278
int fd;
259
279
gpgme_data_t pgp_data;
340
360
* Decrypt OpenPGP data.
341
361
* Returns -1 on error
342
362
*/
363
__attribute__((nonnull, warn_unused_result))
343
364
static ssize_t pgp_packet_decrypt(const char *cryptotext,
344
365
size_t crypto_size,
345
366
char **plaintext,
465
486
return plaintext_length;
466
487
}
467
488
468
static const char * safer_gnutls_strerror(int value){
489
__attribute__((warn_unused_result))
490
static const char *safer_gnutls_strerror(int value){
469
491
const char *ret = gnutls_strerror(value);
470
492
if(ret == NULL)
471
493
ret = "(unknown)";
473
495
}
474
496
475
497
/* GnuTLS log function callback */
498
__attribute__((nonnull))
476
499
static void debuggnutls(__attribute__((unused)) int level,
477
500
const char* string){
478
501
fprintf_plus(stderr, "GnuTLS: %s", string);
479
502
}
480
503
504
__attribute__((nonnull, warn_unused_result))
481
505
static int init_gnutls_global(const char *pubkeyfilename,
482
506
const char *seckeyfilename,
483
507
mandos_context *mc){
557
581
return -1;
558
582
}
559
583
584
__attribute__((nonnull, warn_unused_result))
560
585
static int init_gnutls_session(gnutls_session_t *session,
561
586
mandos_context *mc){
562
587
int ret;
619
644
__attribute__((unused)) const char *txt){}
620
645
621
646
/* Called when a Mandos server is found */
647
__attribute__((nonnull, warn_unused_result))
622
648
static int start_mandos_communication(const char *ip, in_port_t port,
623
649
AvahiIfIndex if_index,
624
650
int af, mandos_context *mc){
625
651
int ret, tcp_sd = -1;
626
652
ssize_t sret;
627
union {
628
struct sockaddr_in in;
629
struct sockaddr_in6 in6;
630
} to;
653
struct sockaddr_storage to;
631
654
char *buffer = NULL;
632
655
char *decrypted_buffer = NULL;
633
656
size_t buffer_length = 0;
657
680
return -1;
658
681
}
659
682
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
660
715
ret = init_gnutls_session(&session, mc);
661
716
if(ret != 0){
662
717
return -1;
682
737
683
738
memset(&to, 0, sizeof(to));
684
739
if(af == AF_INET6){
685
to.in6.sin6_family = (sa_family_t)af;
686
ret = inet_pton(af, ip, &to.in6.sin6_addr);
740
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
741
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
687
742
} else { /* IPv4 */
688
to.in.sin_family = (sa_family_t)af;
689
ret = inet_pton(af, ip, &to.in.sin_addr);
743
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
744
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
690
745
}
691
746
if(ret < 0 ){
692
747
int e = errno;
701
756
goto mandos_end;
702
757
}
703
758
if(af == AF_INET6){
704
to.in6.sin6_port = htons(port);
705
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
706
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
707
-Wunreachable-code*/
759
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
760
if(IN6_IS_ADDR_LINKLOCAL
761
(&((struct sockaddr_in6 *)&to)->sin6_addr)){
708
762
if(if_index == AVAHI_IF_UNSPEC){
709
763
fprintf_plus(stderr, "An IPv6 link-local address is"
710
764
" incomplete without a network interface\n");
712
766
goto mandos_end;
713
767
}
714
768
/* Set the network interface number as scope */
715
to.in6.sin6_scope_id = (uint32_t)if_index;
769
((struct sockaddr_in6 *)&to)->sin6_scope_id = (uint32_t)if_index;
716
770
}
717
771
} else {
718
to.in.sin_port = htons(port); /* Spurious warnings from
719
-Wconversion and
720
-Wunreachable-code */
772
((struct sockaddr_in *)&to)->sin_port = htons(port);
721
773
}
722
774
723
775
if(quit_now){
740
792
}
741
793
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
742
794
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
743
const char *pcret;
744
795
if(af == AF_INET6){
745
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
746
sizeof(addrstr));
796
ret = getnameinfo((struct sockaddr *)&to,
797
sizeof(struct sockaddr_in6),
798
addrstr, sizeof(addrstr), NULL, 0,
799
NI_NUMERICHOST);
747
800
} else {
748
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
749
sizeof(addrstr));
801
ret = getnameinfo((struct sockaddr *)&to,
802
sizeof(struct sockaddr_in),
803
addrstr, sizeof(addrstr), NULL, 0,
804
NI_NUMERICHOST);
750
805
}
751
if(pcret == NULL){
752
perror_plus("inet_ntop");
753
} else {
754
if(strcmp(addrstr, ip) != 0){
755
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
756
}
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);
757
812
}
758
813
}
759
814
763
818
}
764
819
765
820
if(af == AF_INET6){
766
ret = connect(tcp_sd, &to.in6, sizeof(to));
821
ret = connect(tcp_sd, (struct sockaddr *)&to,
822
sizeof(struct sockaddr_in6));
767
823
} else {
768
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
824
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
825
sizeof(struct sockaddr_in));
769
826
}
770
827
if(ret < 0){
771
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
828
if((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
772
829
int e = errno;
773
830
perror_plus("connect");
774
831
errno = e;
989
1046
return retval;
990
1047
}
991
1048
1049
__attribute__((nonnull))
992
1050
static void resolve_callback(AvahiSServiceResolver *r,
993
1051
AvahiIfIndex interface,
994
1052
AvahiProtocol proto,
1002
1060
AVAHI_GCC_UNUSED AvahiStringList *txt,
1003
1061
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1004
1062
flags,
1005
void* mc){
1063
void *mc){
1006
1064
if(r == NULL){
1007
1065
return;
1008
1066
}
1061
1119
const char *domain,
1062
1120
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1063
1121
flags,
1064
void* mc){
1122
void *mc){
1065
1123
if(b == NULL){
1066
1124
return;
1067
1125
}
1127
1185
errno = old_errno;
1128
1186
}
1129
1187
1188
__attribute__((nonnull, warn_unused_result))
1130
1189
bool get_flags(const char *ifname, struct ifreq *ifr){
1131
1190
int ret;
1132
1191
error_t ret_errno;
1151
1210
return true;
1152
1211
}
1153
1212
1213
__attribute__((nonnull, warn_unused_result))
1154
1214
bool good_flags(const char *ifname, const struct ifreq *ifr){
1155
1215
1156
1216
/* Reject the loopback device */
1198
1258
* corresponds to an acceptable network device.
1199
1259
* (This function is passed to scandir(3) as a filter function.)
1200
1260
*/
1261
__attribute__((nonnull, warn_unused_result))
1201
1262
int good_interface(const struct dirent *if_entry){
1202
1263
if(if_entry->d_name[0] == '.'){
1203
1264
return 0;
1221
1282
/*
1222
1283
* This function determines if a network interface is up.
1223
1284
*/
1285
__attribute__((nonnull, warn_unused_result))
1224
1286
bool interface_is_up(const char *interface){
1225
1287
struct ifreq ifr;
1226
1288
if(not get_flags(interface, &ifr)){
1237
1299
/*
1238
1300
* This function determines if a network interface is running
1239
1301
*/
1302
__attribute__((nonnull, warn_unused_result))
1240
1303
bool interface_is_running(const char *interface){
1241
1304
struct ifreq ifr;
1242
1305
if(not get_flags(interface, &ifr)){
1250
1313
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1251
1314
}
1252
1315
1316
__attribute__((nonnull, pure, warn_unused_result))
1253
1317
int notdotentries(const struct dirent *direntry){
1254
1318
/* Skip "." and ".." */
1255
1319
if(direntry->d_name[0] == '.'
1262
1326
}
1263
1327
1264
1328
/* Is this directory entry a runnable program? */
1329
__attribute__((nonnull, warn_unused_result))
1265
1330
int runnable_hook(const struct dirent *direntry){
1266
1331
int ret;
1267
1332
size_t sret;
1275
1340
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1276
1341
"abcdefghijklmnopqrstuvwxyz"
1277
1342
"0123456789"
1278
"_-");
1343
"_.-");
1279
1344
if((direntry->d_name)[sret] != '\0'){
1280
1345
/* Contains non-allowed characters */
1281
1346
if(debug){
1285
1350
return 0;
1286
1351
}
1287
1352
1288
char *fullname = NULL;
1289
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1290
if(ret < 0){
1291
perror_plus("asprintf");
1292
return 0;
1293
}
1294
1295
ret = stat(fullname, &st);
1353
ret = fstatat(hookdir_fd, direntry->d_name, &st, 0);
1296
1354
if(ret == -1){
1297
1355
if(debug){
1298
1356
perror_plus("Could not stat hook");
1322
1380
return 1;
1323
1381
}
1324
1382
1383
__attribute__((nonnull, warn_unused_result))
1325
1384
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1326
1385
mandos_context *mc){
1327
1386
int ret;
1331
1390
1332
1391
while(true){
1333
1392
if(mc->current_server == NULL){
1334
if (debug){
1393
if(debug){
1335
1394
fprintf_plus(stderr, "Wait until first server is found."
1336
1395
" No timeout!\n");
1337
1396
}
1338
1397
ret = avahi_simple_poll_iterate(s, -1);
1339
1398
} else {
1340
if (debug){
1399
if(debug){
1341
1400
fprintf_plus(stderr, "Check current_server if we should run"
1342
1401
" it, or wait\n");
1343
1402
}
1360
1419
- ((intmax_t)waited_time.tv_sec * 1000))
1361
1420
- ((intmax_t)waited_time.tv_nsec / 1000000));
1362
1421
1363
if (debug){
1422
if(debug){
1364
1423
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1365
1424
block_time);
1366
1425
}
1388
1447
ret = avahi_simple_poll_iterate(s, (int)block_time);
1389
1448
}
1390
1449
if(ret != 0){
1391
if (ret > 0 or errno != EINTR){
1450
if(ret > 0 or errno != EINTR){
1392
1451
return (ret != 1) ? ret : 0;
1393
1452
}
1394
1453
}
1396
1455
}
1397
1456
1398
1457
/* Set effective uid to 0, return errno */
1458
__attribute__((warn_unused_result))
1399
1459
error_t raise_privileges(void){
1400
1460
error_t old_errno = errno;
1401
1461
error_t ret_errno = 0;
1402
1462
if(seteuid(0) == -1){
1403
1463
ret_errno = errno;
1404
perror_plus("seteuid");
1405
1464
}
1406
1465
errno = old_errno;
1407
1466
return ret_errno;
1408
1467
}
1409
1468
1410
1469
/* Set effective and real user ID to 0. Return errno. */
1470
__attribute__((warn_unused_result))
1411
1471
error_t raise_privileges_permanently(void){
1412
1472
error_t old_errno = errno;
1413
1473
error_t ret_errno = raise_privileges();
1417
1477
}
1418
1478
if(setuid(0) == -1){
1419
1479
ret_errno = errno;
1420
perror_plus("seteuid");
1421
1480
}
1422
1481
errno = old_errno;
1423
1482
return ret_errno;
1424
1483
}
1425
1484
1426
1485
/* Set effective user ID to unprivileged saved user ID */
1486
__attribute__((warn_unused_result))
1427
1487
error_t lower_privileges(void){
1428
1488
error_t old_errno = errno;
1429
1489
error_t ret_errno = 0;
1430
1490
if(seteuid(uid) == -1){
1431
1491
ret_errno = errno;
1432
perror_plus("seteuid");
1433
1492
}
1434
1493
errno = old_errno;
1435
1494
return ret_errno;
1436
1495
}
1437
1496
1438
1497
/* Lower privileges permanently */
1498
__attribute__((warn_unused_result))
1439
1499
error_t lower_privileges_permanently(void){
1440
1500
error_t old_errno = errno;
1441
1501
error_t ret_errno = 0;
1442
1502
if(setuid(uid) == -1){
1443
1503
ret_errno = errno;
1444
perror_plus("setuid");
1445
1504
}
1446
1505
errno = old_errno;
1447
1506
return ret_errno;
1448
1507
}
1449
1508
1450
bool run_network_hooks(const char *mode, const char *interface,
1509
__attribute__((nonnull))
1510
void run_network_hooks(const char *mode, const char *interface,
1451
1511
const float delay){
1452
struct dirent **direntries;
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__ */
1539
if(numhooks == -1){
1540
perror_plus("scandir");
1541
return;
1542
}
1453
1543
struct dirent *direntry;
1454
1544
int ret;
1455
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1456
alphasort);
1457
if(numhooks == -1){
1458
if(errno == ENOENT){
1459
if(debug){
1460
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1461
" found\n", hookdir);
1462
}
1463
} else {
1464
perror_plus("scandir");
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);
1465
1551
}
1466
} else {
1467
int devnull = open("/dev/null", O_RDONLY);
1468
for(int i = 0; i < numhooks; i++){
1469
direntry = direntries[i];
1470
char *fullname = NULL;
1471
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1472
if(ret < 0){
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){
1473
1613
perror_plus("asprintf");
1474
continue;
1475
}
1476
if(debug){
1477
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1478
direntry->d_name);
1479
}
1480
pid_t hook_pid = fork();
1481
if(hook_pid == 0){
1482
/* Child */
1483
/* Raise privileges */
1484
raise_privileges_permanently();
1485
/* Set group */
1486
errno = 0;
1487
ret = setgid(0);
1488
if(ret == -1){
1489
perror_plus("setgid");
1490
}
1491
/* Reset supplementary groups */
1492
errno = 0;
1493
ret = setgroups(0, NULL);
1494
if(ret == -1){
1495
perror_plus("setgroups");
1496
}
1497
dup2(devnull, STDIN_FILENO);
1498
close(devnull);
1499
dup2(STDERR_FILENO, STDOUT_FILENO);
1500
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1501
if(ret == -1){
1502
perror_plus("setenv");
1503
_exit(EX_OSERR);
1504
}
1505
ret = setenv("DEVICE", interface, 1);
1506
if(ret == -1){
1507
perror_plus("setenv");
1508
_exit(EX_OSERR);
1509
}
1510
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1511
if(ret == -1){
1512
perror_plus("setenv");
1513
_exit(EX_OSERR);
1514
}
1515
ret = setenv("MODE", mode, 1);
1516
if(ret == -1){
1517
perror_plus("setenv");
1518
_exit(EX_OSERR);
1519
}
1520
char *delaystring;
1521
ret = asprintf(&delaystring, "%f", delay);
1522
if(ret == -1){
1523
perror_plus("asprintf");
1524
_exit(EX_OSERR);
1525
}
1526
ret = setenv("DELAY", delaystring, 1);
1527
if(ret == -1){
1528
free(delaystring);
1529
perror_plus("setenv");
1530
_exit(EX_OSERR);
1531
}
1614
_exit(EX_OSERR);
1615
}
1616
ret = setenv("DELAY", delaystring, 1);
1617
if(ret == -1){
1532
1618
free(delaystring);
1533
if(connect_to != NULL){
1534
ret = setenv("CONNECT", connect_to, 1);
1535
if(ret == -1){
1536
perror_plus("setenv");
1537
_exit(EX_OSERR);
1538
}
1539
}
1540
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1541
perror_plus("execl");
1542
_exit(EXIT_FAILURE);
1543
}
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;
1544
1662
} else {
1545
int status;
1546
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1547
perror_plus("waitpid");
1548
free(fullname);
1549
continue;
1550
}
1551
if(WIFEXITED(status)){
1552
if(WEXITSTATUS(status) != 0){
1553
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1554
" with status %d\n", direntry->d_name,
1555
WEXITSTATUS(status));
1556
free(fullname);
1557
continue;
1558
}
1559
} else if(WIFSIGNALED(status)){
1560
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1561
" signal %d\n", direntry->d_name,
1562
WTERMSIG(status));
1563
free(fullname);
1564
continue;
1565
} else {
1566
fprintf_plus(stderr, "Warning: network hook \"%s\""
1567
" crashed\n", direntry->d_name);
1568
free(fullname);
1569
continue;
1570
}
1571
}
1572
free(fullname);
1573
if(debug){
1574
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1575
direntry->d_name);
1576
}
1577
}
1578
close(devnull);
1579
}
1580
return true;
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);
1581
1680
}
1582
1681
1682
__attribute__((nonnull, warn_unused_result))
1583
1683
error_t bring_up_interface(const char *const interface,
1584
1684
const float delay){
1585
int sd = -1;
1586
1685
error_t old_errno = errno;
1587
error_t ret_errno = 0;
1588
int ret, ret_setflags;
1686
int ret;
1589
1687
struct ifreq network;
1590
1688
unsigned int if_index = if_nametoindex(interface);
1591
1689
if(if_index == 0){
1600
1698
}
1601
1699
1602
1700
if(not interface_is_up(interface)){
1603
if(not get_flags(interface, &network) and debug){
1701
error_t ret_errno = 0, ioctl_errno = 0;
1702
if(not get_flags(interface, &network)){
1604
1703
ret_errno = errno;
1605
1704
fprintf_plus(stderr, "Failed to get flags for interface "
1606
1705
"\"%s\"\n", interface);
1706
errno = old_errno;
1607
1707
return ret_errno;
1608
1708
}
1609
network.ifr_flags |= IFF_UP;
1709
network.ifr_flags |= IFF_UP; /* set flag */
1610
1710
1611
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1612
if(sd < 0){
1711
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1712
if(sd == -1){
1613
1713
ret_errno = errno;
1614
1714
perror_plus("socket");
1615
1715
errno = old_errno;
1616
1716
return ret_errno;
1617
1717
}
1618
1718
1619
1719
if(quit_now){
1620
close(sd);
1720
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1721
if(ret == -1){
1722
perror_plus("close");
1723
}
1621
1724
errno = old_errno;
1622
1725
return EINTR;
1623
1726
}
1627
1730
interface);
1628
1731
}
1629
1732
1630
/* Raise priviliges */
1631
raise_privileges();
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
1739
1633
1740
#ifdef __linux__
1634
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1635
messages about the network interface to mess up the prompt */
1636
int ret_linux = klogctl(8, NULL, 5);
1637
bool restore_loglevel = true;
1638
if(ret_linux == -1){
1639
restore_loglevel = false;
1640
perror_plus("klogctl");
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
}
1641
1752
}
1642
1753
#endif /* __linux__ */
1643
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1644
ret_errno = errno;
1754
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1755
ioctl_errno = errno;
1645
1756
#ifdef __linux__
1646
1757
if(restore_loglevel){
1647
1758
ret_linux = klogctl(7, NULL, 0);
1651
1762
}
1652
1763
#endif /* __linux__ */
1653
1764
1654
/* Lower privileges */
1655
lower_privileges();
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
1774
1657
1775
/* Close the socket */
1658
1776
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1661
1779
}
1662
1780
1663
1781
if(ret_setflags == -1){
1664
errno = ret_errno;
1782
errno = ioctl_errno;
1665
1783
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1666
1784
errno = old_errno;
1667
return ret_errno;
1785
return ioctl_errno;
1668
1786
}
1669
1787
} else if(debug){
1670
1788
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1688
1806
return 0;
1689
1807
}
1690
1808
1809
__attribute__((nonnull, warn_unused_result))
1691
1810
error_t take_down_interface(const char *const interface){
1692
int sd = -1;
1693
1811
error_t old_errno = errno;
1694
error_t ret_errno = 0;
1695
int ret, ret_setflags;
1696
1812
struct ifreq network;
1697
1813
unsigned int if_index = if_nametoindex(interface);
1698
1814
if(if_index == 0){
1701
1817
return ENXIO;
1702
1818
}
1703
1819
if(interface_is_up(interface)){
1820
error_t ret_errno = 0, ioctl_errno = 0;
1704
1821
if(not get_flags(interface, &network) and debug){
1705
1822
ret_errno = errno;
1706
1823
fprintf_plus(stderr, "Failed to get flags for interface "
1707
1824
"\"%s\"\n", interface);
1825
errno = old_errno;
1708
1826
return ret_errno;
1709
1827
}
1710
1828
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1711
1829
1712
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1713
if(sd < 0){
1830
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1831
if(sd == -1){
1714
1832
ret_errno = errno;
1715
1833
perror_plus("socket");
1716
1834
errno = old_errno;
1722
1840
interface);
1723
1841
}
1724
1842
1725
/* Raise priviliges */
1726
raise_privileges();
1727
1728
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1729
ret_errno = errno;
1730
1731
/* Lower privileges */
1732
lower_privileges();
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
}
1733
1862
1734
1863
/* Close the socket */
1735
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1864
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
1736
1865
if(ret == -1){
1737
1866
perror_plus("close");
1738
1867
}
1739
1868
1740
1869
if(ret_setflags == -1){
1741
errno = ret_errno;
1870
errno = ioctl_errno;
1742
1871
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1743
1872
errno = old_errno;
1744
return ret_errno;
1873
return ioctl_errno;
1745
1874
}
1746
1875
} else if(debug){
1747
1876
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1755
1884
int main(int argc, char *argv[]){
1756
1885
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1757
1886
.priority = "SECURE256:!CTYPE-X.509:"
1758
"+CTYPE-OPENPGP", .current_server = NULL };
1887
"+CTYPE-OPENPGP", .current_server = NULL,
1888
.interfaces = NULL, .interfaces_size = 0 };
1759
1889
AvahiSServiceBrowser *sb = NULL;
1760
1890
error_t ret_errno;
1761
1891
int ret;
1762
1892
intmax_t tmpmax;
1763
1893
char *tmp;
1764
1894
int exitcode = EXIT_SUCCESS;
1765
char *interfaces = NULL;
1766
size_t interfaces_size = 0;
1767
1895
char *interfaces_to_take_down = NULL;
1768
1896
size_t interfaces_to_take_down_size = 0;
1769
char tempdir[] = "/tmp/mandosXXXXXX";
1770
bool tempdir_created = false;
1897
char run_tempdir[] = "/run/tmp/mandosXXXXXX";
1898
char old_tempdir[] = "/tmp/mandosXXXXXX";
1899
char *tempdir = NULL;
1771
1900
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1772
1901
const char *seckey = PATHDIR "/" SECKEY;
1773
1902
const char *pubkey = PATHDIR "/" PUBKEY;
1774
1903
char *interfaces_hooks = NULL;
1775
size_t interfaces_hooks_size = 0;
1776
1904
1777
1905
bool gnutls_initialized = false;
1778
1906
bool gpgme_initialized = false;
1869
1997
connect_to = arg;
1870
1998
break;
1871
1999
case 'i': /* --interface */
1872
ret_errno = argz_add_sep(&interfaces, &interfaces_size, arg,
1873
(int)',');
2000
ret_errno = argz_add_sep(&mc.interfaces, &mc.interfaces_size,
2001
arg, (int)',');
1874
2002
if(ret_errno != 0){
1875
2003
argp_error(state, "%s", strerror(ret_errno));
1876
2004
}
1956
2084
/* Work around Debian bug #633582:
1957
2085
<http://bugs.debian.org/633582> */
1958
2086
1959
/* Re-raise priviliges */
1960
if(raise_privileges() == 0){
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 {
1961
2093
struct stat st;
1962
2094
1963
2095
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2003
2135
}
2004
2136
2005
2137
/* Lower privileges */
2006
errno = 0;
2007
ret = seteuid(uid);
2008
if(ret == -1){
2009
perror_plus("seteuid");
2138
ret_errno = lower_privileges();
2139
if(ret_errno != 0){
2140
errno = ret_errno;
2141
perror_plus("Failed to lower privileges");
2010
2142
}
2011
2143
}
2012
2144
}
2013
2145
2014
/* Remove empty interface names */
2146
/* Remove invalid interface names (except "none") */
2015
2147
{
2016
2148
char *interface = NULL;
2017
while((interface = argz_next(interfaces, interfaces_size,
2149
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2018
2150
interface))){
2019
if(if_nametoindex(interface) == 0){
2020
if(interface[0] != '\0' and strcmp(interface, "none") != 0){
2151
if(strcmp(interface, "none") != 0
2152
and if_nametoindex(interface) == 0){
2153
if(interface[0] != '\0'){
2021
2154
fprintf_plus(stderr, "Not using nonexisting interface"
2022
2155
" \"%s\"\n", interface);
2023
2156
}
2024
argz_delete(&interfaces, &interfaces_size, interface);
2157
argz_delete(&mc.interfaces, &mc.interfaces_size, interface);
2025
2158
interface = NULL;
2026
2159
}
2027
2160
}
2029
2162
2030
2163
/* Run network hooks */
2031
2164
{
2032
2033
if(interfaces != NULL){
2034
interfaces_hooks = malloc(interfaces_size);
2165
if(mc.interfaces != NULL){
2166
interfaces_hooks = malloc(mc.interfaces_size);
2035
2167
if(interfaces_hooks == NULL){
2036
2168
perror_plus("malloc");
2037
2169
goto end;
2038
2170
}
2039
memcpy(interfaces_hooks, interfaces, interfaces_size);
2040
interfaces_hooks_size = interfaces_size;
2041
argz_stringify(interfaces_hooks, interfaces_hooks_size,
2042
(int)',');
2043
}
2044
if(not run_network_hooks("start", interfaces_hooks != NULL ?
2045
interfaces_hooks : "", delay)){
2046
goto end;
2047
}
2171
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);
2048
2176
}
2049
2177
2050
2178
if(not debug){
2127
2255
}
2128
2256
2129
2257
/* If no interfaces were specified, make a list */
2130
if(interfaces == NULL){
2131
struct dirent **direntries;
2258
if(mc.interfaces == NULL){
2259
struct dirent **direntries = NULL;
2132
2260
/* Look for any good interfaces */
2133
2261
ret = scandir(sys_class_net, &direntries, good_interface,
2134
2262
alphasort);
2135
2263
if(ret >= 1){
2136
2264
/* Add all found interfaces to interfaces list */
2137
2265
for(int i = 0; i < ret; ++i){
2138
ret_errno = argz_add(&interfaces, &interfaces_size,
2266
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2139
2267
direntries[i]->d_name);
2140
2268
if(ret_errno != 0){
2269
errno = ret_errno;
2141
2270
perror_plus("argz_add");
2142
2271
continue;
2143
2272
}
2148
2277
}
2149
2278
free(direntries);
2150
2279
} else {
2151
free(direntries);
2280
if(ret == 0){
2281
free(direntries);
2282
}
2152
2283
fprintf_plus(stderr, "Could not find a network interface\n");
2153
2284
exitcode = EXIT_FAILURE;
2154
2285
goto end;
2155
2286
}
2156
2287
}
2157
2288
2158
/* If we only got one interface, explicitly use only that one */
2159
if(argz_count(interfaces, interfaces_size) == 1){
2160
if(debug){
2161
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2162
interfaces);
2163
}
2164
if_index = (AvahiIfIndex)if_nametoindex(interfaces);
2165
}
2166
2167
/* Bring up interfaces which are down */
2168
if(not (argz_count(interfaces, interfaces_size) == 1
2169
and strcmp(interfaces, "none") == 0)){
2289
/* Bring up interfaces which are down, and remove any "none"s */
2290
{
2170
2291
char *interface = NULL;
2171
while((interface = argz_next(interfaces, interfaces_size,
2292
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2172
2293
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
}
2173
2310
bool interface_was_up = interface_is_up(interface);
2174
ret = bring_up_interface(interface, delay);
2311
errno = bring_up_interface(interface, delay);
2175
2312
if(not interface_was_up){
2176
if(ret != 0){
2177
errno = ret;
2313
if(errno != 0){
2178
2314
perror_plus("Failed to bring up interface");
2179
2315
} else {
2180
ret_errno = argz_add(&interfaces_to_take_down,
2181
&interfaces_to_take_down_size,
2182
interface);
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
}
2183
2322
}
2184
2323
}
2185
2324
}
2186
free(interfaces);
2187
interfaces = NULL;
2188
interfaces_size = 0;
2189
2325
if(debug and (interfaces_to_take_down == NULL)){
2190
2326
fprintf_plus(stderr, "No interfaces were brought up\n");
2191
2327
}
2192
2328
}
2193
2329
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
2194
2339
if(quit_now){
2195
2340
goto end;
2196
2341
}
2208
2353
goto end;
2209
2354
}
2210
2355
2211
if(mkdtemp(tempdir) == NULL){
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
2366
perror_plus("mkdtemp");
2213
2367
goto end;
2214
2368
}
2215
tempdir_created = true;
2216
2369
2217
2370
if(quit_now){
2218
2371
goto end;
2254
2407
exitcode = EX_USAGE;
2255
2408
goto end;
2256
2409
}
2257
2410
2258
2411
if(quit_now){
2259
2412
goto end;
2260
2413
}
2290
2443
fprintf_plus(stderr, "Retrying in %d seconds\n",
2291
2444
(int)retry_interval);
2292
2445
}
2293
sleep((int)retry_interval);
2446
sleep((unsigned int)retry_interval);
2294
2447
}
2295
2448
2296
if (not quit_now){
2449
if(not quit_now){
2297
2450
exitcode = EXIT_SUCCESS;
2298
2451
}
2299
2452
2354
2507
if(debug){
2355
2508
fprintf_plus(stderr, "Starting Avahi loop search\n");
2356
2509
}
2357
2510
2358
2511
ret = avahi_loop_with_timeout(simple_poll,
2359
2512
(int)(retry_interval * 1000), &mc);
2360
2513
if(debug){
2369
2522
}
2370
2523
2371
2524
/* Cleanup things */
2525
free(mc.interfaces);
2526
2372
2527
if(sb != NULL)
2373
2528
avahi_s_service_browser_free(sb);
2374
2529
2399
2554
}
2400
2555
}
2401
2556
2402
/* Re-raise priviliges */
2557
/* Re-raise privileges */
2403
2558
{
2404
raise_privileges();
2405
2406
/* Run network hooks */
2407
run_network_hooks("stop", interfaces_hooks != NULL ?
2408
interfaces_hooks : "", delay);
2409
2410
/* Take down the network interfaces which were brought up */
2411
{
2412
char *interface = NULL;
2413
while((interface=argz_next(interfaces_to_take_down,
2414
interfaces_to_take_down_size,
2415
interface))){
2416
ret_errno = take_down_interface(interface);
2417
if(ret_errno != 0){
2418
errno = ret_errno;
2419
perror_plus("Failed to take down interface");
2420
}
2421
}
2422
if(debug and (interfaces_to_take_down == NULL)){
2423
fprintf_plus(stderr, "No interfaces needed to be taken"
2424
" down\n");
2425
}
2426
}
2427
2428
lower_privileges_permanently();
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
}
2429
2593
}
2430
2594
2431
2595
free(interfaces_to_take_down);
2432
2596
free(interfaces_hooks);
2433
2597
2434
2598
/* Removes the GPGME temp directory and all files inside */
2435
if(tempdir_created){
2599
if(tempdir != NULL){
2436
2600
struct dirent **direntries = NULL;
2437
struct dirent *direntry = NULL;
2438
int numentries = scandir(tempdir, &direntries, notdotentries,
2439
alphasort);
2440
if (numentries > 0){
2441
for(int i = 0; i < numentries; i++){
2442
direntry = direntries[i];
2443
char *fullname = NULL;
2444
ret = asprintf(&fullname, "%s/%s", tempdir,
2445
direntry->d_name);
2446
if(ret < 0){
2447
perror_plus("asprintf");
2448
continue;
2449
}
2450
ret = remove(fullname);
2451
if(ret == -1){
2452
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2453
strerror(errno));
2454
}
2455
free(fullname);
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
}
2456
2637
}
2457
}
2458
2459
/* need to clean even if 0 because man page doesn't specify */
2460
free(direntries);
2461
if (numentries == -1){
2462
perror_plus("scandir");
2463
}
2464
ret = rmdir(tempdir);
2465
if(ret == -1 and errno != ENOENT){
2466
perror_plus("rmdir");
2638
TEMP_FAILURE_RETRY(close(tempdir_fd));
2467
2639
}
2468
2640
}
2469
2641
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0