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- Committer: Teddy Hogeborn
- Date: 2014-03-23 19:24:40 UTC
- 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:
- Makefile
added
removed
plugins.d/mandos-client.c
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);
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
#ifdef __GNUC__
740
#pragma GCC diagnostic push
741
#pragma GCC diagnostic ignored "-Wstrict-aliasing"
742
#endif
743
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
744
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower */
745
#ifdef __GNUC__
746
#pragma GCC diagnostic pop
747
#endif
752
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
753
if(IN6_IS_ADDR_LINKLOCAL
754
(&((struct sockaddr_in6 *)&to)->sin6_addr)){
748
755
if(if_index == AVAHI_IF_UNSPEC){
749
756
fprintf_plus(stderr, "An IPv6 link-local address is"
750
757
" incomplete without a network interface\n");
752
759
goto mandos_end;
753
760
}
754
761
/* Set the network interface number as scope */
755
to.in6.sin6_scope_id = (uint32_t)if_index;
762
((struct sockaddr_in6 *)&to)->sin6_scope_id = (uint32_t)if_index;
756
763
}
757
764
} else {
758
to.in.sin_port = htons(port);
765
((struct sockaddr_in *)&to)->sin_port = htons(port);
759
766
}
760
767
761
768
if(quit_now){
778
785
}
779
786
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
780
787
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
781
const char *pcret;
782
788
if(af == AF_INET6){
783
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
784
sizeof(addrstr));
789
ret = getnameinfo((struct sockaddr *)&to,
790
sizeof(struct sockaddr_in6),
791
addrstr, sizeof(addrstr), NULL, 0,
792
NI_NUMERICHOST);
785
793
} else {
786
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
787
sizeof(addrstr));
794
ret = getnameinfo((struct sockaddr *)&to,
795
sizeof(struct sockaddr_in),
796
addrstr, sizeof(addrstr), NULL, 0,
797
NI_NUMERICHOST);
788
798
}
789
if(pcret == NULL){
790
perror_plus("inet_ntop");
791
} else {
792
if(strcmp(addrstr, ip) != 0){
793
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
794
}
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);
795
805
}
796
806
}
797
807
801
811
}
802
812
803
813
if(af == AF_INET6){
804
ret = connect(tcp_sd, &to.in6, sizeof(to));
814
ret = connect(tcp_sd, (struct sockaddr *)&to,
815
sizeof(struct sockaddr_in6));
805
816
} else {
806
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
817
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
818
sizeof(struct sockaddr_in));
807
819
}
808
820
if(ret < 0){
809
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
821
if((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
810
822
int e = errno;
811
823
perror_plus("connect");
812
824
errno = e;
1027
1039
return retval;
1028
1040
}
1029
1041
1042
__attribute__((nonnull))
1030
1043
static void resolve_callback(AvahiSServiceResolver *r,
1031
1044
AvahiIfIndex interface,
1032
1045
AvahiProtocol proto,
1040
1053
AVAHI_GCC_UNUSED AvahiStringList *txt,
1041
1054
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1042
1055
flags,
1043
void* mc){
1056
void *mc){
1044
1057
if(r == NULL){
1045
1058
return;
1046
1059
}
1099
1112
const char *domain,
1100
1113
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1101
1114
flags,
1102
void* mc){
1115
void *mc){
1103
1116
if(b == NULL){
1104
1117
return;
1105
1118
}
1165
1178
errno = old_errno;
1166
1179
}
1167
1180
1181
__attribute__((nonnull, warn_unused_result))
1168
1182
bool get_flags(const char *ifname, struct ifreq *ifr){
1169
1183
int ret;
1170
1184
error_t ret_errno;
1189
1203
return true;
1190
1204
}
1191
1205
1206
__attribute__((nonnull, warn_unused_result))
1192
1207
bool good_flags(const char *ifname, const struct ifreq *ifr){
1193
1208
1194
1209
/* Reject the loopback device */
1236
1251
* corresponds to an acceptable network device.
1237
1252
* (This function is passed to scandir(3) as a filter function.)
1238
1253
*/
1254
__attribute__((nonnull, warn_unused_result))
1239
1255
int good_interface(const struct dirent *if_entry){
1240
1256
if(if_entry->d_name[0] == '.'){
1241
1257
return 0;
1259
1275
/*
1260
1276
* This function determines if a network interface is up.
1261
1277
*/
1278
__attribute__((nonnull, warn_unused_result))
1262
1279
bool interface_is_up(const char *interface){
1263
1280
struct ifreq ifr;
1264
1281
if(not get_flags(interface, &ifr)){
1275
1292
/*
1276
1293
* This function determines if a network interface is running
1277
1294
*/
1295
__attribute__((nonnull, warn_unused_result))
1278
1296
bool interface_is_running(const char *interface){
1279
1297
struct ifreq ifr;
1280
1298
if(not get_flags(interface, &ifr)){
1288
1306
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1289
1307
}
1290
1308
1309
__attribute__((nonnull, pure, warn_unused_result))
1291
1310
int notdotentries(const struct dirent *direntry){
1292
1311
/* Skip "." and ".." */
1293
1312
if(direntry->d_name[0] == '.'
1300
1319
}
1301
1320
1302
1321
/* Is this directory entry a runnable program? */
1322
__attribute__((nonnull, warn_unused_result))
1303
1323
int runnable_hook(const struct dirent *direntry){
1304
1324
int ret;
1305
1325
size_t sret;
1360
1380
return 1;
1361
1381
}
1362
1382
1383
__attribute__((nonnull, warn_unused_result))
1363
1384
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1364
1385
mandos_context *mc){
1365
1386
int ret;
1369
1390
1370
1391
while(true){
1371
1392
if(mc->current_server == NULL){
1372
if (debug){
1393
if(debug){
1373
1394
fprintf_plus(stderr, "Wait until first server is found."
1374
1395
" No timeout!\n");
1375
1396
}
1376
1397
ret = avahi_simple_poll_iterate(s, -1);
1377
1398
} else {
1378
if (debug){
1399
if(debug){
1379
1400
fprintf_plus(stderr, "Check current_server if we should run"
1380
1401
" it, or wait\n");
1381
1402
}
1398
1419
- ((intmax_t)waited_time.tv_sec * 1000))
1399
1420
- ((intmax_t)waited_time.tv_nsec / 1000000));
1400
1421
1401
if (debug){
1422
if(debug){
1402
1423
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1403
1424
block_time);
1404
1425
}
1426
1447
ret = avahi_simple_poll_iterate(s, (int)block_time);
1427
1448
}
1428
1449
if(ret != 0){
1429
if (ret > 0 or errno != EINTR){
1450
if(ret > 0 or errno != EINTR){
1430
1451
return (ret != 1) ? ret : 0;
1431
1452
}
1432
1453
}
1434
1455
}
1435
1456
1436
1457
/* Set effective uid to 0, return errno */
1458
__attribute__((warn_unused_result))
1437
1459
error_t raise_privileges(void){
1438
1460
error_t old_errno = errno;
1439
1461
error_t ret_errno = 0;
1446
1468
}
1447
1469
1448
1470
/* Set effective and real user ID to 0. Return errno. */
1471
__attribute__((warn_unused_result))
1449
1472
error_t raise_privileges_permanently(void){
1450
1473
error_t old_errno = errno;
1451
1474
error_t ret_errno = raise_privileges();
1462
1485
}
1463
1486
1464
1487
/* Set effective user ID to unprivileged saved user ID */
1488
__attribute__((warn_unused_result))
1465
1489
error_t lower_privileges(void){
1466
1490
error_t old_errno = errno;
1467
1491
error_t ret_errno = 0;
1474
1498
}
1475
1499
1476
1500
/* Lower privileges permanently */
1501
__attribute__((warn_unused_result))
1477
1502
error_t lower_privileges_permanently(void){
1478
1503
error_t old_errno = errno;
1479
1504
error_t ret_errno = 0;
1485
1510
return ret_errno;
1486
1511
}
1487
1512
1488
bool run_network_hooks(const char *mode, const char *interface,
1513
__attribute__((nonnull))
1514
void run_network_hooks(const char *mode, const char *interface,
1489
1515
const float delay){
1490
1516
struct dirent **direntries;
1491
struct dirent *direntry;
1492
int ret;
1493
1517
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1494
1518
alphasort);
1495
1519
if(numhooks == -1){
1502
1526
perror_plus("scandir");
1503
1527
}
1504
1528
} else {
1529
struct dirent *direntry;
1530
int ret;
1505
1531
int devnull = open("/dev/null", O_RDONLY);
1506
1532
for(int i = 0; i < numhooks; i++){
1507
1533
direntry = direntries[i];
1519
1545
if(hook_pid == 0){
1520
1546
/* Child */
1521
1547
/* Raise privileges */
1522
raise_privileges_permanently();
1548
if(raise_privileges_permanently() != 0){
1549
perror_plus("Failed to raise privileges");
1550
_exit(EX_NOPERM);
1551
}
1523
1552
/* Set group */
1524
1553
errno = 0;
1525
1554
ret = setgid(0);
1526
1555
if(ret == -1){
1527
1556
perror_plus("setgid");
1557
_exit(EX_NOPERM);
1528
1558
}
1529
1559
/* Reset supplementary groups */
1530
1560
errno = 0;
1531
1561
ret = setgroups(0, NULL);
1532
1562
if(ret == -1){
1533
1563
perror_plus("setgroups");
1534
}
1535
dup2(devnull, STDIN_FILENO);
1536
close(devnull);
1537
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
}
1538
1581
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1539
1582
if(ret == -1){
1540
1583
perror_plus("setenv");
1556
1599
_exit(EX_OSERR);
1557
1600
}
1558
1601
char *delaystring;
1559
ret = asprintf(&delaystring, "%f", delay);
1602
ret = asprintf(&delaystring, "%f", (double)delay);
1560
1603
if(ret == -1){
1561
1604
perror_plus("asprintf");
1562
1605
_exit(EX_OSERR);
1615
1658
}
1616
1659
close(devnull);
1617
1660
}
1618
return true;
1619
1661
}
1620
1662
1663
__attribute__((nonnull, warn_unused_result))
1621
1664
error_t bring_up_interface(const char *const interface,
1622
1665
const float delay){
1623
int sd = -1;
1624
1666
error_t old_errno = errno;
1625
error_t ret_errno = 0;
1626
int ret, ret_setflags;
1667
int ret;
1627
1668
struct ifreq network;
1628
1669
unsigned int if_index = if_nametoindex(interface);
1629
1670
if(if_index == 0){
1638
1679
}
1639
1680
1640
1681
if(not interface_is_up(interface)){
1641
if(not get_flags(interface, &network) and debug){
1682
error_t ret_errno = 0, ioctl_errno = 0;
1683
if(not get_flags(interface, &network)){
1642
1684
ret_errno = errno;
1643
1685
fprintf_plus(stderr, "Failed to get flags for interface "
1644
1686
"\"%s\"\n", interface);
1687
errno = old_errno;
1645
1688
return ret_errno;
1646
1689
}
1647
network.ifr_flags |= IFF_UP;
1690
network.ifr_flags |= IFF_UP; /* set flag */
1648
1691
1649
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1650
if(sd < 0){
1692
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1693
if(sd == -1){
1651
1694
ret_errno = errno;
1652
1695
perror_plus("socket");
1653
1696
errno = old_errno;
1654
1697
return ret_errno;
1655
1698
}
1656
1699
1657
1700
if(quit_now){
1658
close(sd);
1701
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1702
if(ret == -1){
1703
perror_plus("close");
1704
}
1659
1705
errno = old_errno;
1660
1706
return EINTR;
1661
1707
}
1665
1711
interface);
1666
1712
}
1667
1713
1668
/* Raise priviliges */
1669
raise_privileges();
1670
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
}
1671
1720
#ifdef __linux__
1672
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1673
messages about the network interface to mess up the prompt */
1674
int ret_linux = klogctl(8, NULL, 5);
1675
bool restore_loglevel = true;
1676
if(ret_linux == -1){
1677
restore_loglevel = false;
1678
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
}
1679
1731
}
1680
1732
#endif /* __linux__ */
1681
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1682
ret_errno = errno;
1733
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1734
ioctl_errno = errno;
1683
1735
#ifdef __linux__
1684
1736
if(restore_loglevel){
1685
1737
ret_linux = klogctl(7, NULL, 0);
1689
1741
}
1690
1742
#endif /* __linux__ */
1691
1743
1692
/* Lower privileges */
1693
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
}
1694
1753
1695
1754
/* Close the socket */
1696
1755
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1699
1758
}
1700
1759
1701
1760
if(ret_setflags == -1){
1702
errno = ret_errno;
1761
errno = ioctl_errno;
1703
1762
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1704
1763
errno = old_errno;
1705
return ret_errno;
1764
return ioctl_errno;
1706
1765
}
1707
1766
} else if(debug){
1708
1767
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1726
1785
return 0;
1727
1786
}
1728
1787
1788
__attribute__((nonnull, warn_unused_result))
1729
1789
error_t take_down_interface(const char *const interface){
1730
int sd = -1;
1731
1790
error_t old_errno = errno;
1732
error_t ret_errno = 0;
1733
int ret, ret_setflags;
1734
1791
struct ifreq network;
1735
1792
unsigned int if_index = if_nametoindex(interface);
1736
1793
if(if_index == 0){
1739
1796
return ENXIO;
1740
1797
}
1741
1798
if(interface_is_up(interface)){
1799
error_t ret_errno = 0, ioctl_errno = 0;
1742
1800
if(not get_flags(interface, &network) and debug){
1743
1801
ret_errno = errno;
1744
1802
fprintf_plus(stderr, "Failed to get flags for interface "
1745
1803
"\"%s\"\n", interface);
1804
errno = old_errno;
1746
1805
return ret_errno;
1747
1806
}
1748
1807
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1749
1808
1750
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1751
if(sd < 0){
1809
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1810
if(sd == -1){
1752
1811
ret_errno = errno;
1753
1812
perror_plus("socket");
1754
1813
errno = old_errno;
1760
1819
interface);
1761
1820
}
1762
1821
1763
/* Raise priviliges */
1764
raise_privileges();
1765
1766
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1767
ret_errno = errno;
1768
1769
/* Lower privileges */
1770
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
}
1771
1839
1772
1840
/* Close the socket */
1773
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1841
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
1774
1842
if(ret == -1){
1775
1843
perror_plus("close");
1776
1844
}
1777
1845
1778
1846
if(ret_setflags == -1){
1779
errno = ret_errno;
1847
errno = ioctl_errno;
1780
1848
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1781
1849
errno = old_errno;
1782
return ret_errno;
1850
return ioctl_errno;
1783
1851
}
1784
1852
} else if(debug){
1785
1853
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1793
1861
int main(int argc, char *argv[]){
1794
1862
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1795
1863
.priority = "SECURE256:!CTYPE-X.509:"
1796
"+CTYPE-OPENPGP", .current_server = NULL,
1864
"+CTYPE-OPENPGP", .current_server = NULL,
1797
1865
.interfaces = NULL, .interfaces_size = 0 };
1798
1866
AvahiSServiceBrowser *sb = NULL;
1799
1867
error_t ret_errno;
1809
1877
const char *seckey = PATHDIR "/" SECKEY;
1810
1878
const char *pubkey = PATHDIR "/" PUBKEY;
1811
1879
char *interfaces_hooks = NULL;
1812
size_t interfaces_hooks_size = 0;
1813
1880
1814
1881
bool gnutls_initialized = false;
1815
1882
bool gpgme_initialized = false;
1993
2060
/* Work around Debian bug #633582:
1994
2061
<http://bugs.debian.org/633582> */
1995
2062
1996
/* Re-raise priviliges */
1997
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 {
1998
2069
struct stat st;
1999
2070
2000
2071
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2040
2111
}
2041
2112
2042
2113
/* Lower privileges */
2043
lower_privileges();
2114
ret_errno = lower_privileges();
2115
if(ret_errno != 0){
2116
errno = ret_errno;
2117
perror_plus("Failed to lower privileges");
2118
}
2044
2119
}
2045
2120
}
2046
2121
2070
2145
goto end;
2071
2146
}
2072
2147
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2073
interfaces_hooks_size = mc.interfaces_size;
2074
argz_stringify(interfaces_hooks, interfaces_hooks_size,
2075
(int)',');
2076
}
2077
if(not run_network_hooks("start", interfaces_hooks != NULL ?
2078
interfaces_hooks : "", delay)){
2079
goto end;
2080
}
2148
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2149
}
2150
run_network_hooks("start", interfaces_hooks != NULL ?
2151
interfaces_hooks : "", delay);
2081
2152
}
2082
2153
2083
2154
if(not debug){
2171
2242
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2172
2243
direntries[i]->d_name);
2173
2244
if(ret_errno != 0){
2245
errno = ret_errno;
2174
2246
perror_plus("argz_add");
2175
2247
continue;
2176
2248
}
2210
2282
break;
2211
2283
}
2212
2284
bool interface_was_up = interface_is_up(interface);
2213
ret = bring_up_interface(interface, delay);
2285
errno = bring_up_interface(interface, delay);
2214
2286
if(not interface_was_up){
2215
if(ret != 0){
2216
errno = ret;
2287
if(errno != 0){
2217
2288
perror_plus("Failed to bring up interface");
2218
2289
} else {
2219
ret_errno = argz_add(&interfaces_to_take_down,
2220
&interfaces_to_take_down_size,
2221
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
}
2222
2296
}
2223
2297
}
2224
2298
}
2338
2412
sleep((unsigned int)retry_interval);
2339
2413
}
2340
2414
2341
if (not quit_now){
2415
if(not quit_now){
2342
2416
exitcode = EXIT_SUCCESS;
2343
2417
}
2344
2418
2446
2520
}
2447
2521
}
2448
2522
2449
/* Re-raise priviliges */
2523
/* Re-raise privileges */
2450
2524
{
2451
raise_privileges();
2452
2453
/* Run network hooks */
2454
run_network_hooks("stop", interfaces_hooks != NULL ?
2455
interfaces_hooks : "", delay);
2456
2457
/* Take down the network interfaces which were brought up */
2458
{
2459
char *interface = NULL;
2460
while((interface=argz_next(interfaces_to_take_down,
2461
interfaces_to_take_down_size,
2462
interface))){
2463
ret_errno = take_down_interface(interface);
2464
if(ret_errno != 0){
2465
errno = ret_errno;
2466
perror_plus("Failed to take down interface");
2467
}
2468
}
2469
if(debug and (interfaces_to_take_down == NULL)){
2470
fprintf_plus(stderr, "No interfaces needed to be taken"
2471
" down\n");
2472
}
2473
}
2474
2475
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
}
2476
2556
}
2477
2557
2478
2558
free(interfaces_to_take_down);
2484
2564
struct dirent *direntry = NULL;
2485
2565
int numentries = scandir(tempdir, &direntries, notdotentries,
2486
2566
alphasort);
2487
if (numentries > 0){
2567
if(numentries > 0){
2488
2568
for(int i = 0; i < numentries; i++){
2489
2569
direntry = direntries[i];
2490
2570
char *fullname = NULL;
2505
2585
2506
2586
/* need to clean even if 0 because man page doesn't specify */
2507
2587
free(direntries);
2508
if (numentries == -1){
2588
if(numentries == -1){
2509
2589
perror_plus("scandir");
2510
2590
}
2511
2591
ret = rmdir(tempdir);
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0