(root)/mandos/release
» Revision
237.7.220
(compared to revision 237.7.159)
: plugins.d/mandos-client.c
To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/release
« back to all changes in this revision
Viewing changes to plugins.d/mandos-client.c
- browse files at revision 237.7.220
- compare with another revision
- download diff
- download tarball
- view history from revision 237.7.220
- Committer: Teddy Hogeborn
- Date: 2014-03-23 19:24:40 UTC
- mto: (237.7.272 trunk)
- mto: This revision was merged to the branch mainline in revision 311.
- Revision ID: teddy@recompile.se-20140323192440-d71iiqxebsxf9u2v
Update GCC warning flags and function attributes to GCC 4.7.
* Makefile (WARN): Update to include almost all warning flags.
* plugin-runner.c (getplugin, add_to_char_array, add_argument,
add_environment, set_cloexec_flag,
print_out_password): Add attribute
"warn_unused_result".
(main/parse_opt): Bug fix: Add error checking to --global-env,
--env-for, --plugin-dir, and --config-file, and
make sure errno does not "leak" from unrelated
functions.
* plugins.d/mandos-client.c
(fprintf_plus, debuggnutls, resolve_callback): Add "nonnull"
attribute.
(incbuffer, add_server, init_gpgme): Add "nonnull" and
"warn_unused_result"
attributes.
(pgp_packet_decrypt, init_gnutls_global): - '' -
(init_gnutls_session start_mandos_communication, get_flags): - '' -
(good_flags, good_interface, interface_is_up): - '' -
(interface_is_running, runnable_hook): - '' -
(avahi_loop_with_timeout, bring_up_interface): : - '' -
(safer_gnutls_strerror): Add "warn_unused_result" attribute.
(notdotentries): Set "nonnull", "pure", and "warn_unused_result"
attributes.
(raise_privileges, raise_privileges_permanently, lower_privileges,
lower_privileges_permanently): Set "warn_unused_result" attribute.
(run_network_hooks): Exit child process if it fails to do anything
it needs to do. Make explicit cast to double
when passing float value to asprintf(). Change
return type to void - all callers changed.
(bring_up_interface): Move variables "sd", "ret_errno", and
"ret_setflags" to innermost scope. Bug fix:
Fail if could not get interface flags also in
non-debug mode, and restore old errno
correctly. Print message if could not raise
(or later lower) privileges.
(take_down_interface): Bug fix: When failing because it could not
get interface flags, restore old errno
correctly. Print message if it could not
raise (or later lower) privileges.
(main): Complain if failed to raise or lower privileges. Only run
network hooks or lower privileges if raising privileges was
successful.
* Makefile (WARN): Update to include almost all warning flags.
* plugin-runner.c (getplugin, add_to_char_array, add_argument,
add_environment, set_cloexec_flag,
print_out_password): Add attribute
"warn_unused_result".
(main/parse_opt): Bug fix: Add error checking to --global-env,
--env-for, --plugin-dir, and --config-file, and
make sure errno does not "leak" from unrelated
functions.
* plugins.d/mandos-client.c
(fprintf_plus, debuggnutls, resolve_callback): Add "nonnull"
attribute.
(incbuffer, add_server, init_gpgme): Add "nonnull" and
"warn_unused_result"
attributes.
(pgp_packet_decrypt, init_gnutls_global): - '' -
(init_gnutls_session start_mandos_communication, get_flags): - '' -
(good_flags, good_interface, interface_is_up): - '' -
(interface_is_running, runnable_hook): - '' -
(avahi_loop_with_timeout, bring_up_interface): : - '' -
(safer_gnutls_strerror): Add "warn_unused_result" attribute.
(notdotentries): Set "nonnull", "pure", and "warn_unused_result"
attributes.
(raise_privileges, raise_privileges_permanently, lower_privileges,
lower_privileges_permanently): Set "warn_unused_result" attribute.
(run_network_hooks): Exit child process if it fails to do anything
it needs to do. Make explicit cast to double
when passing float value to asprintf(). Change
return type to void - all callers changed.
(bring_up_interface): Move variables "sd", "ret_errno", and
"ret_setflags" to innermost scope. Bug fix:
Fail if could not get interface flags also in
non-debug mode, and restore old errno
correctly. Print message if could not raise
(or later lower) privileges.
(take_down_interface): Bug fix: When failing because it could not
get interface flags, restore old errno
correctly. Print message if it could not
raise (or later lower) privileges.
(main): Complain if failed to raise or lower privileges. Only run
network hooks or lower privileges if raising privileges was
successful.
- files added:
- debian/upstream-signing-key.pgp
- 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 © 2008-2013 Teddy Hogeborn
13
* Copyright © 2008-2013 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
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() */
58
inet_pton(), connect(),
59
getnameinfo() */
59
60
#include <fcntl.h> /* open() */
60
61
#include <dirent.h> /* opendir(), struct dirent, readdir()
61
62
*/
73
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
75
getuid(), getgid(), seteuid(),
75
76
setgid(), pause(), _exit() */
76
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
77
#include <arpa/inet.h> /* inet_pton(), htons() */
77
78
#include <iso646.h> /* not, or, and */
78
79
#include <argp.h> /* struct argp_option, error_t, struct
79
80
argp_state, struct argp,
91
92
argz_delete(), argz_append(),
92
93
argz_stringify(), argz_add(),
93
94
argz_count() */
95
#include <netdb.h> /* getnameinfo(), NI_NUMERICHOST,
96
EAI_SYSTEM, gai_strerror() */
94
97
95
98
#ifdef __linux__
96
99
#include <sys/klog.h> /* klogctl() */
180
183
perror(print_text);
181
184
}
182
185
183
__attribute__((format (gnu_printf, 2, 3)))
186
__attribute__((format (gnu_printf, 2, 3), nonnull))
184
187
int fprintf_plus(FILE *stream, const char *format, ...){
185
188
va_list ap;
186
189
va_start (ap, format);
187
190
188
191
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
189
192
program_invocation_short_name));
190
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
193
return (int)TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
191
194
}
192
195
193
196
/*
195
198
* bytes. "buffer_capacity" is how much is currently allocated,
196
199
* "buffer_length" is how much is already used.
197
200
*/
201
__attribute__((nonnull, warn_unused_result))
198
202
size_t incbuffer(char **buffer, size_t buffer_length,
199
203
size_t buffer_capacity){
200
204
if(buffer_length + BUFFER_SIZE > buffer_capacity){
201
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
202
if(buffer == NULL){
205
char *new_buf = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
206
if(new_buf == NULL){
207
int old_errno = errno;
208
free(*buffer);
209
errno = old_errno;
210
*buffer = NULL;
203
211
return 0;
204
212
}
213
*buffer = new_buf;
205
214
buffer_capacity += BUFFER_SIZE;
206
215
}
207
216
return buffer_capacity;
208
217
}
209
218
210
219
/* Add server to set of servers to retry periodically */
220
__attribute__((nonnull, warn_unused_result))
211
221
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
212
222
int af, server **current_server){
213
223
int ret;
224
234
perror_plus("strdup");
225
235
return false;
226
236
}
237
ret = clock_gettime(CLOCK_MONOTONIC, &(new_server->last_seen));
238
if(ret == -1){
239
perror_plus("clock_gettime");
240
return false;
241
}
227
242
/* Special case of first server */
228
243
if(*current_server == NULL){
229
244
new_server->next = new_server;
230
245
new_server->prev = new_server;
231
246
*current_server = new_server;
232
/* Place the new server last in the list */
233
247
} else {
248
/* Place the new server last in the list */
234
249
new_server->next = *current_server;
235
250
new_server->prev = (*current_server)->prev;
236
251
new_server->prev->next = new_server;
237
252
(*current_server)->prev = new_server;
238
253
}
239
ret = clock_gettime(CLOCK_MONOTONIC, &(*current_server)->last_seen);
240
if(ret == -1){
241
perror_plus("clock_gettime");
242
return false;
243
}
244
254
return true;
245
255
}
246
256
247
257
/*
248
258
* Initialize GPGME.
249
259
*/
260
__attribute__((nonnull, warn_unused_result))
250
261
static bool init_gpgme(const char *seckey, const char *pubkey,
251
262
const char *tempdir, mandos_context *mc){
252
263
gpgme_error_t rc;
342
353
* Decrypt OpenPGP data.
343
354
* Returns -1 on error
344
355
*/
356
__attribute__((nonnull, warn_unused_result))
345
357
static ssize_t pgp_packet_decrypt(const char *cryptotext,
346
358
size_t crypto_size,
347
359
char **plaintext,
467
479
return plaintext_length;
468
480
}
469
481
470
static const char * safer_gnutls_strerror(int value){
482
__attribute__((warn_unused_result))
483
static const char *safer_gnutls_strerror(int value){
471
484
const char *ret = gnutls_strerror(value);
472
485
if(ret == NULL)
473
486
ret = "(unknown)";
475
488
}
476
489
477
490
/* GnuTLS log function callback */
491
__attribute__((nonnull))
478
492
static void debuggnutls(__attribute__((unused)) int level,
479
493
const char* string){
480
494
fprintf_plus(stderr, "GnuTLS: %s", string);
481
495
}
482
496
497
__attribute__((nonnull, warn_unused_result))
483
498
static int init_gnutls_global(const char *pubkeyfilename,
484
499
const char *seckeyfilename,
485
500
mandos_context *mc){
559
574
return -1;
560
575
}
561
576
577
__attribute__((nonnull, warn_unused_result))
562
578
static int init_gnutls_session(gnutls_session_t *session,
563
579
mandos_context *mc){
564
580
int ret;
621
637
__attribute__((unused)) const char *txt){}
622
638
623
639
/* Called when a Mandos server is found */
640
__attribute__((nonnull, warn_unused_result))
624
641
static int start_mandos_communication(const char *ip, in_port_t port,
625
642
AvahiIfIndex if_index,
626
643
int af, mandos_context *mc){
627
644
int ret, tcp_sd = -1;
628
645
ssize_t sret;
629
union {
630
struct sockaddr_in in;
631
struct sockaddr_in6 in6;
632
} to;
646
struct sockaddr_storage to;
633
647
char *buffer = NULL;
634
648
char *decrypted_buffer = NULL;
635
649
size_t buffer_length = 0;
716
730
717
731
memset(&to, 0, sizeof(to));
718
732
if(af == AF_INET6){
719
to.in6.sin6_family = (sa_family_t)af;
720
ret = inet_pton(af, ip, &to.in6.sin6_addr);
733
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
734
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
721
735
} else { /* IPv4 */
722
to.in.sin_family = (sa_family_t)af;
723
ret = inet_pton(af, ip, &to.in.sin_addr);
736
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
737
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
724
738
}
725
739
if(ret < 0 ){
726
740
int e = errno;
735
749
goto mandos_end;
736
750
}
737
751
if(af == AF_INET6){
738
to.in6.sin6_port = htons(port);
739
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
740
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
741
-Wunreachable-code*/
752
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
753
if(IN6_IS_ADDR_LINKLOCAL
754
(&((struct sockaddr_in6 *)&to)->sin6_addr)){
742
755
if(if_index == AVAHI_IF_UNSPEC){
743
756
fprintf_plus(stderr, "An IPv6 link-local address is"
744
757
" incomplete without a network interface\n");
746
759
goto mandos_end;
747
760
}
748
761
/* Set the network interface number as scope */
749
to.in6.sin6_scope_id = (uint32_t)if_index;
762
((struct sockaddr_in6 *)&to)->sin6_scope_id = (uint32_t)if_index;
750
763
}
751
764
} else {
752
to.in.sin_port = htons(port); /* Spurious warnings from
753
-Wconversion and
754
-Wunreachable-code */
765
((struct sockaddr_in *)&to)->sin_port = htons(port);
755
766
}
756
767
757
768
if(quit_now){
774
785
}
775
786
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
776
787
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
777
const char *pcret;
778
788
if(af == AF_INET6){
779
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
780
sizeof(addrstr));
789
ret = getnameinfo((struct sockaddr *)&to,
790
sizeof(struct sockaddr_in6),
791
addrstr, sizeof(addrstr), NULL, 0,
792
NI_NUMERICHOST);
781
793
} else {
782
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
783
sizeof(addrstr));
794
ret = getnameinfo((struct sockaddr *)&to,
795
sizeof(struct sockaddr_in),
796
addrstr, sizeof(addrstr), NULL, 0,
797
NI_NUMERICHOST);
784
798
}
785
if(pcret == NULL){
786
perror_plus("inet_ntop");
787
} else {
788
if(strcmp(addrstr, ip) != 0){
789
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
790
}
799
if(ret == EAI_SYSTEM){
800
perror_plus("getnameinfo");
801
} else if(ret != 0) {
802
fprintf_plus(stderr, "getnameinfo: %s", gai_strerror(ret));
803
} else if(strcmp(addrstr, ip) != 0){
804
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
791
805
}
792
806
}
793
807
797
811
}
798
812
799
813
if(af == AF_INET6){
800
ret = connect(tcp_sd, &to.in6, sizeof(to));
814
ret = connect(tcp_sd, (struct sockaddr *)&to,
815
sizeof(struct sockaddr_in6));
801
816
} else {
802
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
817
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
818
sizeof(struct sockaddr_in));
803
819
}
804
820
if(ret < 0){
805
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
821
if((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
806
822
int e = errno;
807
823
perror_plus("connect");
808
824
errno = e;
1023
1039
return retval;
1024
1040
}
1025
1041
1042
__attribute__((nonnull))
1026
1043
static void resolve_callback(AvahiSServiceResolver *r,
1027
1044
AvahiIfIndex interface,
1028
1045
AvahiProtocol proto,
1036
1053
AVAHI_GCC_UNUSED AvahiStringList *txt,
1037
1054
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1038
1055
flags,
1039
void* mc){
1056
void *mc){
1040
1057
if(r == NULL){
1041
1058
return;
1042
1059
}
1095
1112
const char *domain,
1096
1113
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1097
1114
flags,
1098
void* mc){
1115
void *mc){
1099
1116
if(b == NULL){
1100
1117
return;
1101
1118
}
1161
1178
errno = old_errno;
1162
1179
}
1163
1180
1181
__attribute__((nonnull, warn_unused_result))
1164
1182
bool get_flags(const char *ifname, struct ifreq *ifr){
1165
1183
int ret;
1166
1184
error_t ret_errno;
1185
1203
return true;
1186
1204
}
1187
1205
1206
__attribute__((nonnull, warn_unused_result))
1188
1207
bool good_flags(const char *ifname, const struct ifreq *ifr){
1189
1208
1190
1209
/* Reject the loopback device */
1232
1251
* corresponds to an acceptable network device.
1233
1252
* (This function is passed to scandir(3) as a filter function.)
1234
1253
*/
1254
__attribute__((nonnull, warn_unused_result))
1235
1255
int good_interface(const struct dirent *if_entry){
1236
1256
if(if_entry->d_name[0] == '.'){
1237
1257
return 0;
1255
1275
/*
1256
1276
* This function determines if a network interface is up.
1257
1277
*/
1278
__attribute__((nonnull, warn_unused_result))
1258
1279
bool interface_is_up(const char *interface){
1259
1280
struct ifreq ifr;
1260
1281
if(not get_flags(interface, &ifr)){
1271
1292
/*
1272
1293
* This function determines if a network interface is running
1273
1294
*/
1295
__attribute__((nonnull, warn_unused_result))
1274
1296
bool interface_is_running(const char *interface){
1275
1297
struct ifreq ifr;
1276
1298
if(not get_flags(interface, &ifr)){
1284
1306
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1285
1307
}
1286
1308
1309
__attribute__((nonnull, pure, warn_unused_result))
1287
1310
int notdotentries(const struct dirent *direntry){
1288
1311
/* Skip "." and ".." */
1289
1312
if(direntry->d_name[0] == '.'
1296
1319
}
1297
1320
1298
1321
/* Is this directory entry a runnable program? */
1322
__attribute__((nonnull, warn_unused_result))
1299
1323
int runnable_hook(const struct dirent *direntry){
1300
1324
int ret;
1301
1325
size_t sret;
1356
1380
return 1;
1357
1381
}
1358
1382
1383
__attribute__((nonnull, warn_unused_result))
1359
1384
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1360
1385
mandos_context *mc){
1361
1386
int ret;
1365
1390
1366
1391
while(true){
1367
1392
if(mc->current_server == NULL){
1368
if (debug){
1393
if(debug){
1369
1394
fprintf_plus(stderr, "Wait until first server is found."
1370
1395
" No timeout!\n");
1371
1396
}
1372
1397
ret = avahi_simple_poll_iterate(s, -1);
1373
1398
} else {
1374
if (debug){
1399
if(debug){
1375
1400
fprintf_plus(stderr, "Check current_server if we should run"
1376
1401
" it, or wait\n");
1377
1402
}
1394
1419
- ((intmax_t)waited_time.tv_sec * 1000))
1395
1420
- ((intmax_t)waited_time.tv_nsec / 1000000));
1396
1421
1397
if (debug){
1422
if(debug){
1398
1423
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1399
1424
block_time);
1400
1425
}
1422
1447
ret = avahi_simple_poll_iterate(s, (int)block_time);
1423
1448
}
1424
1449
if(ret != 0){
1425
if (ret > 0 or errno != EINTR){
1450
if(ret > 0 or errno != EINTR){
1426
1451
return (ret != 1) ? ret : 0;
1427
1452
}
1428
1453
}
1430
1455
}
1431
1456
1432
1457
/* Set effective uid to 0, return errno */
1458
__attribute__((warn_unused_result))
1433
1459
error_t raise_privileges(void){
1434
1460
error_t old_errno = errno;
1435
1461
error_t ret_errno = 0;
1442
1468
}
1443
1469
1444
1470
/* Set effective and real user ID to 0. Return errno. */
1471
__attribute__((warn_unused_result))
1445
1472
error_t raise_privileges_permanently(void){
1446
1473
error_t old_errno = errno;
1447
1474
error_t ret_errno = raise_privileges();
1458
1485
}
1459
1486
1460
1487
/* Set effective user ID to unprivileged saved user ID */
1488
__attribute__((warn_unused_result))
1461
1489
error_t lower_privileges(void){
1462
1490
error_t old_errno = errno;
1463
1491
error_t ret_errno = 0;
1470
1498
}
1471
1499
1472
1500
/* Lower privileges permanently */
1501
__attribute__((warn_unused_result))
1473
1502
error_t lower_privileges_permanently(void){
1474
1503
error_t old_errno = errno;
1475
1504
error_t ret_errno = 0;
1481
1510
return ret_errno;
1482
1511
}
1483
1512
1484
bool run_network_hooks(const char *mode, const char *interface,
1513
__attribute__((nonnull))
1514
void run_network_hooks(const char *mode, const char *interface,
1485
1515
const float delay){
1486
1516
struct dirent **direntries;
1487
struct dirent *direntry;
1488
int ret;
1489
1517
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1490
1518
alphasort);
1491
1519
if(numhooks == -1){
1498
1526
perror_plus("scandir");
1499
1527
}
1500
1528
} else {
1529
struct dirent *direntry;
1530
int ret;
1501
1531
int devnull = open("/dev/null", O_RDONLY);
1502
1532
for(int i = 0; i < numhooks; i++){
1503
1533
direntry = direntries[i];
1515
1545
if(hook_pid == 0){
1516
1546
/* Child */
1517
1547
/* Raise privileges */
1518
raise_privileges_permanently();
1548
if(raise_privileges_permanently() != 0){
1549
perror_plus("Failed to raise privileges");
1550
_exit(EX_NOPERM);
1551
}
1519
1552
/* Set group */
1520
1553
errno = 0;
1521
1554
ret = setgid(0);
1522
1555
if(ret == -1){
1523
1556
perror_plus("setgid");
1557
_exit(EX_NOPERM);
1524
1558
}
1525
1559
/* Reset supplementary groups */
1526
1560
errno = 0;
1527
1561
ret = setgroups(0, NULL);
1528
1562
if(ret == -1){
1529
1563
perror_plus("setgroups");
1530
}
1531
dup2(devnull, STDIN_FILENO);
1532
close(devnull);
1533
dup2(STDERR_FILENO, STDOUT_FILENO);
1564
_exit(EX_NOPERM);
1565
}
1566
ret = dup2(devnull, STDIN_FILENO);
1567
if(ret == -1){
1568
perror_plus("dup2(devnull, STDIN_FILENO)");
1569
_exit(EX_OSERR);
1570
}
1571
ret = close(devnull);
1572
if(ret == -1){
1573
perror_plus("close");
1574
_exit(EX_OSERR);
1575
}
1576
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1577
if(ret == -1){
1578
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1579
_exit(EX_OSERR);
1580
}
1534
1581
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1535
1582
if(ret == -1){
1536
1583
perror_plus("setenv");
1552
1599
_exit(EX_OSERR);
1553
1600
}
1554
1601
char *delaystring;
1555
ret = asprintf(&delaystring, "%f", delay);
1602
ret = asprintf(&delaystring, "%f", (double)delay);
1556
1603
if(ret == -1){
1557
1604
perror_plus("asprintf");
1558
1605
_exit(EX_OSERR);
1611
1658
}
1612
1659
close(devnull);
1613
1660
}
1614
return true;
1615
1661
}
1616
1662
1663
__attribute__((nonnull, warn_unused_result))
1617
1664
error_t bring_up_interface(const char *const interface,
1618
1665
const float delay){
1619
int sd = -1;
1620
1666
error_t old_errno = errno;
1621
error_t ret_errno = 0;
1622
int ret, ret_setflags;
1667
int ret;
1623
1668
struct ifreq network;
1624
1669
unsigned int if_index = if_nametoindex(interface);
1625
1670
if(if_index == 0){
1634
1679
}
1635
1680
1636
1681
if(not interface_is_up(interface)){
1637
if(not get_flags(interface, &network) and debug){
1682
error_t ret_errno = 0, ioctl_errno = 0;
1683
if(not get_flags(interface, &network)){
1638
1684
ret_errno = errno;
1639
1685
fprintf_plus(stderr, "Failed to get flags for interface "
1640
1686
"\"%s\"\n", interface);
1687
errno = old_errno;
1641
1688
return ret_errno;
1642
1689
}
1643
network.ifr_flags |= IFF_UP;
1690
network.ifr_flags |= IFF_UP; /* set flag */
1644
1691
1645
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1646
if(sd < 0){
1692
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1693
if(sd == -1){
1647
1694
ret_errno = errno;
1648
1695
perror_plus("socket");
1649
1696
errno = old_errno;
1650
1697
return ret_errno;
1651
1698
}
1652
1699
1653
1700
if(quit_now){
1654
close(sd);
1701
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1702
if(ret == -1){
1703
perror_plus("close");
1704
}
1655
1705
errno = old_errno;
1656
1706
return EINTR;
1657
1707
}
1661
1711
interface);
1662
1712
}
1663
1713
1664
/* Raise priviliges */
1665
raise_privileges();
1666
1714
/* Raise privileges */
1715
ret_errno = raise_privileges();
1716
bool restore_loglevel = false;
1717
if(ret_errno != 0){
1718
perror_plus("Failed to raise privileges");
1719
}
1667
1720
#ifdef __linux__
1668
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1669
messages about the network interface to mess up the prompt */
1670
int ret_linux = klogctl(8, NULL, 5);
1671
bool restore_loglevel = true;
1672
if(ret_linux == -1){
1673
restore_loglevel = false;
1674
perror_plus("klogctl");
1721
int ret_linux;
1722
if(ret_errno == 0){
1723
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1724
messages about the network interface to mess up the prompt */
1725
ret_linux = klogctl(8, NULL, 5);
1726
if(ret_linux == -1){
1727
perror_plus("klogctl");
1728
} else {
1729
restore_loglevel = true;
1730
}
1675
1731
}
1676
1732
#endif /* __linux__ */
1677
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1678
ret_errno = errno;
1733
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1734
ioctl_errno = errno;
1679
1735
#ifdef __linux__
1680
1736
if(restore_loglevel){
1681
1737
ret_linux = klogctl(7, NULL, 0);
1685
1741
}
1686
1742
#endif /* __linux__ */
1687
1743
1688
/* Lower privileges */
1689
lower_privileges();
1744
/* If raise_privileges() succeeded above */
1745
if(ret_errno == 0){
1746
/* Lower privileges */
1747
ret_errno = lower_privileges();
1748
if(ret_errno != 0){
1749
errno = ret_errno;
1750
perror_plus("Failed to lower privileges");
1751
}
1752
}
1690
1753
1691
1754
/* Close the socket */
1692
1755
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1695
1758
}
1696
1759
1697
1760
if(ret_setflags == -1){
1698
errno = ret_errno;
1761
errno = ioctl_errno;
1699
1762
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1700
1763
errno = old_errno;
1701
return ret_errno;
1764
return ioctl_errno;
1702
1765
}
1703
1766
} else if(debug){
1704
1767
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1722
1785
return 0;
1723
1786
}
1724
1787
1788
__attribute__((nonnull, warn_unused_result))
1725
1789
error_t take_down_interface(const char *const interface){
1726
int sd = -1;
1727
1790
error_t old_errno = errno;
1728
error_t ret_errno = 0;
1729
int ret, ret_setflags;
1730
1791
struct ifreq network;
1731
1792
unsigned int if_index = if_nametoindex(interface);
1732
1793
if(if_index == 0){
1735
1796
return ENXIO;
1736
1797
}
1737
1798
if(interface_is_up(interface)){
1799
error_t ret_errno = 0, ioctl_errno = 0;
1738
1800
if(not get_flags(interface, &network) and debug){
1739
1801
ret_errno = errno;
1740
1802
fprintf_plus(stderr, "Failed to get flags for interface "
1741
1803
"\"%s\"\n", interface);
1804
errno = old_errno;
1742
1805
return ret_errno;
1743
1806
}
1744
1807
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1745
1808
1746
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1747
if(sd < 0){
1809
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1810
if(sd == -1){
1748
1811
ret_errno = errno;
1749
1812
perror_plus("socket");
1750
1813
errno = old_errno;
1756
1819
interface);
1757
1820
}
1758
1821
1759
/* Raise priviliges */
1760
raise_privileges();
1761
1762
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1763
ret_errno = errno;
1764
1765
/* Lower privileges */
1766
lower_privileges();
1822
/* Raise privileges */
1823
ret_errno = raise_privileges();
1824
if(ret_errno != 0){
1825
perror_plus("Failed to raise privileges");
1826
}
1827
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1828
ioctl_errno = errno;
1829
1830
/* If raise_privileges() succeeded above */
1831
if(ret_errno == 0){
1832
/* Lower privileges */
1833
ret_errno = lower_privileges();
1834
if(ret_errno != 0){
1835
errno = ret_errno;
1836
perror_plus("Failed to lower privileges");
1837
}
1838
}
1767
1839
1768
1840
/* Close the socket */
1769
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1841
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
1770
1842
if(ret == -1){
1771
1843
perror_plus("close");
1772
1844
}
1773
1845
1774
1846
if(ret_setflags == -1){
1775
errno = ret_errno;
1847
errno = ioctl_errno;
1776
1848
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1777
1849
errno = old_errno;
1778
return ret_errno;
1850
return ioctl_errno;
1779
1851
}
1780
1852
} else if(debug){
1781
1853
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1789
1861
int main(int argc, char *argv[]){
1790
1862
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1791
1863
.priority = "SECURE256:!CTYPE-X.509:"
1792
"+CTYPE-OPENPGP", .current_server = NULL,
1864
"+CTYPE-OPENPGP", .current_server = NULL,
1793
1865
.interfaces = NULL, .interfaces_size = 0 };
1794
1866
AvahiSServiceBrowser *sb = NULL;
1795
1867
error_t ret_errno;
1805
1877
const char *seckey = PATHDIR "/" SECKEY;
1806
1878
const char *pubkey = PATHDIR "/" PUBKEY;
1807
1879
char *interfaces_hooks = NULL;
1808
size_t interfaces_hooks_size = 0;
1809
1880
1810
1881
bool gnutls_initialized = false;
1811
1882
bool gpgme_initialized = false;
1989
2060
/* Work around Debian bug #633582:
1990
2061
<http://bugs.debian.org/633582> */
1991
2062
1992
/* Re-raise priviliges */
1993
if(raise_privileges() == 0){
2063
/* Re-raise privileges */
2064
ret_errno = raise_privileges();
2065
if(ret_errno != 0){
2066
errno = ret_errno;
2067
perror_plus("Failed to raise privileges");
2068
} else {
1994
2069
struct stat st;
1995
2070
1996
2071
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2036
2111
}
2037
2112
2038
2113
/* Lower privileges */
2039
lower_privileges();
2114
ret_errno = lower_privileges();
2115
if(ret_errno != 0){
2116
errno = ret_errno;
2117
perror_plus("Failed to lower privileges");
2118
}
2040
2119
}
2041
2120
}
2042
2121
2066
2145
goto end;
2067
2146
}
2068
2147
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2069
interfaces_hooks_size = mc.interfaces_size;
2070
argz_stringify(interfaces_hooks, interfaces_hooks_size,
2071
(int)',');
2072
}
2073
if(not run_network_hooks("start", interfaces_hooks != NULL ?
2074
interfaces_hooks : "", delay)){
2075
goto end;
2076
}
2148
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2149
}
2150
run_network_hooks("start", interfaces_hooks != NULL ?
2151
interfaces_hooks : "", delay);
2077
2152
}
2078
2153
2079
2154
if(not debug){
2167
2242
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2168
2243
direntries[i]->d_name);
2169
2244
if(ret_errno != 0){
2245
errno = ret_errno;
2170
2246
perror_plus("argz_add");
2171
2247
continue;
2172
2248
}
2206
2282
break;
2207
2283
}
2208
2284
bool interface_was_up = interface_is_up(interface);
2209
ret = bring_up_interface(interface, delay);
2285
errno = bring_up_interface(interface, delay);
2210
2286
if(not interface_was_up){
2211
if(ret != 0){
2212
errno = ret;
2287
if(errno != 0){
2213
2288
perror_plus("Failed to bring up interface");
2214
2289
} else {
2215
ret_errno = argz_add(&interfaces_to_take_down,
2216
&interfaces_to_take_down_size,
2217
interface);
2290
errno = argz_add(&interfaces_to_take_down,
2291
&interfaces_to_take_down_size,
2292
interface);
2293
if(errno != 0){
2294
perror_plus("argz_add");
2295
}
2218
2296
}
2219
2297
}
2220
2298
}
2331
2409
fprintf_plus(stderr, "Retrying in %d seconds\n",
2332
2410
(int)retry_interval);
2333
2411
}
2334
sleep((int)retry_interval);
2412
sleep((unsigned int)retry_interval);
2335
2413
}
2336
2414
2337
if (not quit_now){
2415
if(not quit_now){
2338
2416
exitcode = EXIT_SUCCESS;
2339
2417
}
2340
2418
2442
2520
}
2443
2521
}
2444
2522
2445
/* Re-raise priviliges */
2523
/* Re-raise privileges */
2446
2524
{
2447
raise_privileges();
2448
2449
/* Run network hooks */
2450
run_network_hooks("stop", interfaces_hooks != NULL ?
2451
interfaces_hooks : "", delay);
2452
2453
/* Take down the network interfaces which were brought up */
2454
{
2455
char *interface = NULL;
2456
while((interface=argz_next(interfaces_to_take_down,
2457
interfaces_to_take_down_size,
2458
interface))){
2459
ret_errno = take_down_interface(interface);
2460
if(ret_errno != 0){
2461
errno = ret_errno;
2462
perror_plus("Failed to take down interface");
2463
}
2464
}
2465
if(debug and (interfaces_to_take_down == NULL)){
2466
fprintf_plus(stderr, "No interfaces needed to be taken"
2467
" down\n");
2468
}
2469
}
2470
2471
lower_privileges_permanently();
2525
ret_errno = raise_privileges();
2526
if(ret_errno != 0){
2527
perror_plus("Failed to raise privileges");
2528
} else {
2529
2530
/* Run network hooks */
2531
run_network_hooks("stop", interfaces_hooks != NULL ?
2532
interfaces_hooks : "", delay);
2533
2534
/* Take down the network interfaces which were brought up */
2535
{
2536
char *interface = NULL;
2537
while((interface=argz_next(interfaces_to_take_down,
2538
interfaces_to_take_down_size,
2539
interface))){
2540
ret_errno = take_down_interface(interface);
2541
if(ret_errno != 0){
2542
errno = ret_errno;
2543
perror_plus("Failed to take down interface");
2544
}
2545
}
2546
if(debug and (interfaces_to_take_down == NULL)){
2547
fprintf_plus(stderr, "No interfaces needed to be taken"
2548
" down\n");
2549
}
2550
}
2551
}
2552
ret_errno = lower_privileges_permanently();
2553
if(ret_errno != 0){
2554
perror_plus("Failed to lower privileges permanently");
2555
}
2472
2556
}
2473
2557
2474
2558
free(interfaces_to_take_down);
2480
2564
struct dirent *direntry = NULL;
2481
2565
int numentries = scandir(tempdir, &direntries, notdotentries,
2482
2566
alphasort);
2483
if (numentries > 0){
2567
if(numentries > 0){
2484
2568
for(int i = 0; i < numentries; i++){
2485
2569
direntry = direntries[i];
2486
2570
char *fullname = NULL;
2501
2585
2502
2586
/* need to clean even if 0 because man page doesn't specify */
2503
2587
free(direntries);
2504
if (numentries == -1){
2588
if(numentries == -1){
2505
2589
perror_plus("scandir");
2506
2590
}
2507
2591
ret = rmdir(tempdir);
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0