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- Committer: Teddy Hogeborn
- Date: 2013-10-30 21:05:47 UTC
- Revision ID: teddy@recompile.se-20131030210547-f1hoaesur3p3m04z
Don't require /var/lib/mandos to be installed with user & group.
* Makefile (install-server): Don't fail if changing user & group fails.
Reported-by: Nathanael D. Noblet <nathanael@gnat.ca>
Suggested-by: Nathanael D. Noblet <nathanael@gnat.ca>
* Makefile (install-server): Don't fail if changing user & group fails.
Reported-by: Nathanael D. Noblet <nathanael@gnat.ca>
Suggested-by: Nathanael D. Noblet <nathanael@gnat.ca>
- files removed:
- debian/upstream
- 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(),
59
getnameinfo() */
58
inet_pton(), connect() */
60
59
#include <fcntl.h> /* open() */
61
60
#include <dirent.h> /* opendir(), struct dirent, readdir()
62
61
*/
74
73
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
74
getuid(), getgid(), seteuid(),
76
75
setgid(), pause(), _exit() */
77
#include <arpa/inet.h> /* inet_pton(), htons() */
76
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
78
77
#include <iso646.h> /* not, or, and */
79
78
#include <argp.h> /* struct argp_option, error_t, struct
80
79
argp_state, struct argp,
92
91
argz_delete(), argz_append(),
93
92
argz_stringify(), argz_add(),
94
93
argz_count() */
95
#include <netdb.h> /* getnameinfo(), NI_NUMERICHOST,
96
EAI_SYSTEM, gai_strerror() */
97
94
98
95
#ifdef __linux__
99
96
#include <sys/klog.h> /* klogctl() */
136
133
137
134
bool debug = false;
138
135
static const char mandos_protocol_version[] = "1";
139
const char * argp_program_version = "mandos-client " VERSION;
140
const char * argp_program_bug_address = "<mandos@recompile.se>";
136
const char *argp_program_version = "mandos-client " VERSION;
137
const char *argp_program_bug_address = "<mandos@recompile.se>";
141
138
static const char sys_class_net[] = "/sys/class/net";
142
139
char *connect_to = NULL;
143
140
const char *hookdir = HOOKDIR;
183
180
perror(print_text);
184
181
}
185
182
186
__attribute__((format (gnu_printf, 2, 3), nonnull))
183
__attribute__((format (gnu_printf, 2, 3)))
187
184
int fprintf_plus(FILE *stream, const char *format, ...){
188
185
va_list ap;
189
186
va_start (ap, format);
198
195
* bytes. "buffer_capacity" is how much is currently allocated,
199
196
* "buffer_length" is how much is already used.
200
197
*/
201
__attribute__((nonnull, warn_unused_result))
202
198
size_t incbuffer(char **buffer, size_t buffer_length,
203
199
size_t buffer_capacity){
204
200
if(buffer_length + BUFFER_SIZE > buffer_capacity){
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;
201
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
202
if(buffer == NULL){
211
203
return 0;
212
204
}
213
*buffer = new_buf;
214
205
buffer_capacity += BUFFER_SIZE;
215
206
}
216
207
return buffer_capacity;
217
208
}
218
209
219
210
/* Add server to set of servers to retry periodically */
220
__attribute__((nonnull, warn_unused_result))
221
211
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
222
212
int af, server **current_server){
223
213
int ret;
234
224
perror_plus("strdup");
235
225
return false;
236
226
}
237
ret = clock_gettime(CLOCK_MONOTONIC, &(new_server->last_seen));
238
if(ret == -1){
239
perror_plus("clock_gettime");
240
return false;
241
}
242
227
/* Special case of first server */
243
228
if(*current_server == NULL){
244
229
new_server->next = new_server;
245
230
new_server->prev = new_server;
246
231
*current_server = new_server;
232
/* Place the new server last in the list */
247
233
} else {
248
/* Place the new server last in the list */
249
234
new_server->next = *current_server;
250
235
new_server->prev = (*current_server)->prev;
251
236
new_server->prev->next = new_server;
252
237
(*current_server)->prev = new_server;
253
238
}
239
ret = clock_gettime(CLOCK_MONOTONIC, &(*current_server)->last_seen);
240
if(ret == -1){
241
perror_plus("clock_gettime");
242
return false;
243
}
254
244
return true;
255
245
}
256
246
257
247
/*
258
248
* Initialize GPGME.
259
249
*/
260
__attribute__((nonnull, warn_unused_result))
261
static bool init_gpgme(const char * const seckey,
262
const char * const pubkey,
263
const char * const tempdir,
264
mandos_context *mc){
250
static bool init_gpgme(const char *seckey, const char *pubkey,
251
const char *tempdir, mandos_context *mc){
265
252
gpgme_error_t rc;
266
253
gpgme_engine_info_t engine_info;
267
254
268
255
/*
269
256
* Helper function to insert pub and seckey to the engine keyring.
270
257
*/
271
bool import_key(const char * const filename){
258
bool import_key(const char *filename){
272
259
int ret;
273
260
int fd;
274
261
gpgme_data_t pgp_data;
355
342
* Decrypt OpenPGP data.
356
343
* Returns -1 on error
357
344
*/
358
__attribute__((nonnull, warn_unused_result))
359
345
static ssize_t pgp_packet_decrypt(const char *cryptotext,
360
346
size_t crypto_size,
361
347
char **plaintext,
481
467
return plaintext_length;
482
468
}
483
469
484
__attribute__((warn_unused_result))
485
static const char *safer_gnutls_strerror(int value){
470
static const char * safer_gnutls_strerror(int value){
486
471
const char *ret = gnutls_strerror(value);
487
472
if(ret == NULL)
488
473
ret = "(unknown)";
490
475
}
491
476
492
477
/* GnuTLS log function callback */
493
__attribute__((nonnull))
494
478
static void debuggnutls(__attribute__((unused)) int level,
495
479
const char* string){
496
480
fprintf_plus(stderr, "GnuTLS: %s", string);
497
481
}
498
482
499
__attribute__((nonnull, warn_unused_result))
500
483
static int init_gnutls_global(const char *pubkeyfilename,
501
484
const char *seckeyfilename,
502
485
mandos_context *mc){
576
559
return -1;
577
560
}
578
561
579
__attribute__((nonnull, warn_unused_result))
580
562
static int init_gnutls_session(gnutls_session_t *session,
581
563
mandos_context *mc){
582
564
int ret;
639
621
__attribute__((unused)) const char *txt){}
640
622
641
623
/* Called when a Mandos server is found */
642
__attribute__((nonnull, warn_unused_result))
643
624
static int start_mandos_communication(const char *ip, in_port_t port,
644
625
AvahiIfIndex if_index,
645
626
int af, mandos_context *mc){
646
627
int ret, tcp_sd = -1;
647
628
ssize_t sret;
648
struct sockaddr_storage to;
629
union {
630
struct sockaddr_in in;
631
struct sockaddr_in6 in6;
632
} to;
649
633
char *buffer = NULL;
650
634
char *decrypted_buffer = NULL;
651
635
size_t buffer_length = 0;
732
716
733
717
memset(&to, 0, sizeof(to));
734
718
if(af == AF_INET6){
735
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
736
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
719
to.in6.sin6_family = (sa_family_t)af;
720
ret = inet_pton(af, ip, &to.in6.sin6_addr);
737
721
} else { /* IPv4 */
738
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
739
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
722
to.in.sin_family = (sa_family_t)af;
723
ret = inet_pton(af, ip, &to.in.sin_addr);
740
724
}
741
725
if(ret < 0 ){
742
726
int e = errno;
751
735
goto mandos_end;
752
736
}
753
737
if(af == AF_INET6){
754
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
755
if(IN6_IS_ADDR_LINKLOCAL
756
(&((struct sockaddr_in6 *)&to)->sin6_addr)){
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*/
757
742
if(if_index == AVAHI_IF_UNSPEC){
758
743
fprintf_plus(stderr, "An IPv6 link-local address is"
759
744
" incomplete without a network interface\n");
761
746
goto mandos_end;
762
747
}
763
748
/* Set the network interface number as scope */
764
((struct sockaddr_in6 *)&to)->sin6_scope_id = (uint32_t)if_index;
749
to.in6.sin6_scope_id = (uint32_t)if_index;
765
750
}
766
751
} else {
767
((struct sockaddr_in *)&to)->sin_port = htons(port);
752
to.in.sin_port = htons(port); /* Spurious warnings from
753
-Wconversion and
754
-Wunreachable-code */
768
755
}
769
756
770
757
if(quit_now){
787
774
}
788
775
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
789
776
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
777
const char *pcret;
790
778
if(af == AF_INET6){
791
ret = getnameinfo((struct sockaddr *)&to,
792
sizeof(struct sockaddr_in6),
793
addrstr, sizeof(addrstr), NULL, 0,
794
NI_NUMERICHOST);
779
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
780
sizeof(addrstr));
795
781
} else {
796
ret = getnameinfo((struct sockaddr *)&to,
797
sizeof(struct sockaddr_in),
798
addrstr, sizeof(addrstr), NULL, 0,
799
NI_NUMERICHOST);
782
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
783
sizeof(addrstr));
800
784
}
801
if(ret == EAI_SYSTEM){
802
perror_plus("getnameinfo");
803
} else if(ret != 0) {
804
fprintf_plus(stderr, "getnameinfo: %s", gai_strerror(ret));
805
} else if(strcmp(addrstr, ip) != 0){
806
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
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
}
807
791
}
808
792
}
809
793
813
797
}
814
798
815
799
if(af == AF_INET6){
816
ret = connect(tcp_sd, (struct sockaddr *)&to,
817
sizeof(struct sockaddr_in6));
800
ret = connect(tcp_sd, &to.in6, sizeof(to));
818
801
} else {
819
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
820
sizeof(struct sockaddr_in));
802
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
821
803
}
822
804
if(ret < 0){
823
if((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
805
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
824
806
int e = errno;
825
807
perror_plus("connect");
826
808
errno = e;
1041
1023
return retval;
1042
1024
}
1043
1025
1044
__attribute__((nonnull))
1045
1026
static void resolve_callback(AvahiSServiceResolver *r,
1046
1027
AvahiIfIndex interface,
1047
1028
AvahiProtocol proto,
1055
1036
AVAHI_GCC_UNUSED AvahiStringList *txt,
1056
1037
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1057
1038
flags,
1058
void *mc){
1039
void* mc){
1059
1040
if(r == NULL){
1060
1041
return;
1061
1042
}
1114
1095
const char *domain,
1115
1096
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1116
1097
flags,
1117
void *mc){
1098
void* mc){
1118
1099
if(b == NULL){
1119
1100
return;
1120
1101
}
1180
1161
errno = old_errno;
1181
1162
}
1182
1163
1183
__attribute__((nonnull, warn_unused_result))
1184
1164
bool get_flags(const char *ifname, struct ifreq *ifr){
1185
1165
int ret;
1186
1166
error_t ret_errno;
1205
1185
return true;
1206
1186
}
1207
1187
1208
__attribute__((nonnull, warn_unused_result))
1209
1188
bool good_flags(const char *ifname, const struct ifreq *ifr){
1210
1189
1211
1190
/* Reject the loopback device */
1253
1232
* corresponds to an acceptable network device.
1254
1233
* (This function is passed to scandir(3) as a filter function.)
1255
1234
*/
1256
__attribute__((nonnull, warn_unused_result))
1257
1235
int good_interface(const struct dirent *if_entry){
1258
1236
if(if_entry->d_name[0] == '.'){
1259
1237
return 0;
1277
1255
/*
1278
1256
* This function determines if a network interface is up.
1279
1257
*/
1280
__attribute__((nonnull, warn_unused_result))
1281
1258
bool interface_is_up(const char *interface){
1282
1259
struct ifreq ifr;
1283
1260
if(not get_flags(interface, &ifr)){
1294
1271
/*
1295
1272
* This function determines if a network interface is running
1296
1273
*/
1297
__attribute__((nonnull, warn_unused_result))
1298
1274
bool interface_is_running(const char *interface){
1299
1275
struct ifreq ifr;
1300
1276
if(not get_flags(interface, &ifr)){
1308
1284
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1309
1285
}
1310
1286
1311
__attribute__((nonnull, pure, warn_unused_result))
1312
1287
int notdotentries(const struct dirent *direntry){
1313
1288
/* Skip "." and ".." */
1314
1289
if(direntry->d_name[0] == '.'
1321
1296
}
1322
1297
1323
1298
/* Is this directory entry a runnable program? */
1324
__attribute__((nonnull, warn_unused_result))
1325
1299
int runnable_hook(const struct dirent *direntry){
1326
1300
int ret;
1327
1301
size_t sret;
1382
1356
return 1;
1383
1357
}
1384
1358
1385
__attribute__((nonnull, warn_unused_result))
1386
1359
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1387
1360
mandos_context *mc){
1388
1361
int ret;
1392
1365
1393
1366
while(true){
1394
1367
if(mc->current_server == NULL){
1395
if(debug){
1368
if (debug){
1396
1369
fprintf_plus(stderr, "Wait until first server is found."
1397
1370
" No timeout!\n");
1398
1371
}
1399
1372
ret = avahi_simple_poll_iterate(s, -1);
1400
1373
} else {
1401
if(debug){
1374
if (debug){
1402
1375
fprintf_plus(stderr, "Check current_server if we should run"
1403
1376
" it, or wait\n");
1404
1377
}
1421
1394
- ((intmax_t)waited_time.tv_sec * 1000))
1422
1395
- ((intmax_t)waited_time.tv_nsec / 1000000));
1423
1396
1424
if(debug){
1397
if (debug){
1425
1398
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1426
1399
block_time);
1427
1400
}
1449
1422
ret = avahi_simple_poll_iterate(s, (int)block_time);
1450
1423
}
1451
1424
if(ret != 0){
1452
if(ret > 0 or errno != EINTR){
1425
if (ret > 0 or errno != EINTR){
1453
1426
return (ret != 1) ? ret : 0;
1454
1427
}
1455
1428
}
1457
1430
}
1458
1431
1459
1432
/* Set effective uid to 0, return errno */
1460
__attribute__((warn_unused_result))
1461
1433
error_t raise_privileges(void){
1462
1434
error_t old_errno = errno;
1463
1435
error_t ret_errno = 0;
1470
1442
}
1471
1443
1472
1444
/* Set effective and real user ID to 0. Return errno. */
1473
__attribute__((warn_unused_result))
1474
1445
error_t raise_privileges_permanently(void){
1475
1446
error_t old_errno = errno;
1476
1447
error_t ret_errno = raise_privileges();
1487
1458
}
1488
1459
1489
1460
/* Set effective user ID to unprivileged saved user ID */
1490
__attribute__((warn_unused_result))
1491
1461
error_t lower_privileges(void){
1492
1462
error_t old_errno = errno;
1493
1463
error_t ret_errno = 0;
1500
1470
}
1501
1471
1502
1472
/* Lower privileges permanently */
1503
__attribute__((warn_unused_result))
1504
1473
error_t lower_privileges_permanently(void){
1505
1474
error_t old_errno = errno;
1506
1475
error_t ret_errno = 0;
1512
1481
return ret_errno;
1513
1482
}
1514
1483
1515
__attribute__((nonnull))
1516
void run_network_hooks(const char *mode, const char *interface,
1484
bool run_network_hooks(const char *mode, const char *interface,
1517
1485
const float delay){
1518
1486
struct dirent **direntries;
1487
struct dirent *direntry;
1488
int ret;
1519
1489
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1520
1490
alphasort);
1521
1491
if(numhooks == -1){
1528
1498
perror_plus("scandir");
1529
1499
}
1530
1500
} else {
1531
struct dirent *direntry;
1532
int ret;
1533
1501
int devnull = open("/dev/null", O_RDONLY);
1534
1502
for(int i = 0; i < numhooks; i++){
1535
1503
direntry = direntries[i];
1547
1515
if(hook_pid == 0){
1548
1516
/* Child */
1549
1517
/* Raise privileges */
1550
if(raise_privileges_permanently() != 0){
1551
perror_plus("Failed to raise privileges");
1552
_exit(EX_NOPERM);
1553
}
1518
raise_privileges_permanently();
1554
1519
/* Set group */
1555
1520
errno = 0;
1556
1521
ret = setgid(0);
1557
1522
if(ret == -1){
1558
1523
perror_plus("setgid");
1559
_exit(EX_NOPERM);
1560
1524
}
1561
1525
/* Reset supplementary groups */
1562
1526
errno = 0;
1563
1527
ret = setgroups(0, NULL);
1564
1528
if(ret == -1){
1565
1529
perror_plus("setgroups");
1566
_exit(EX_NOPERM);
1567
}
1568
ret = dup2(devnull, STDIN_FILENO);
1569
if(ret == -1){
1570
perror_plus("dup2(devnull, STDIN_FILENO)");
1571
_exit(EX_OSERR);
1572
}
1573
ret = close(devnull);
1574
if(ret == -1){
1575
perror_plus("close");
1576
_exit(EX_OSERR);
1577
}
1578
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1579
if(ret == -1){
1580
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1581
_exit(EX_OSERR);
1582
}
1530
}
1531
dup2(devnull, STDIN_FILENO);
1532
close(devnull);
1533
dup2(STDERR_FILENO, STDOUT_FILENO);
1583
1534
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1584
1535
if(ret == -1){
1585
1536
perror_plus("setenv");
1601
1552
_exit(EX_OSERR);
1602
1553
}
1603
1554
char *delaystring;
1604
ret = asprintf(&delaystring, "%f", (double)delay);
1555
ret = asprintf(&delaystring, "%f", delay);
1605
1556
if(ret == -1){
1606
1557
perror_plus("asprintf");
1607
1558
_exit(EX_OSERR);
1660
1611
}
1661
1612
close(devnull);
1662
1613
}
1614
return true;
1663
1615
}
1664
1616
1665
__attribute__((nonnull, warn_unused_result))
1666
1617
error_t bring_up_interface(const char *const interface,
1667
1618
const float delay){
1619
int sd = -1;
1668
1620
error_t old_errno = errno;
1669
int ret;
1621
error_t ret_errno = 0;
1622
int ret, ret_setflags;
1670
1623
struct ifreq network;
1671
1624
unsigned int if_index = if_nametoindex(interface);
1672
1625
if(if_index == 0){
1681
1634
}
1682
1635
1683
1636
if(not interface_is_up(interface)){
1684
error_t ret_errno = 0, ioctl_errno = 0;
1685
if(not get_flags(interface, &network)){
1637
if(not get_flags(interface, &network) and debug){
1686
1638
ret_errno = errno;
1687
1639
fprintf_plus(stderr, "Failed to get flags for interface "
1688
1640
"\"%s\"\n", interface);
1689
errno = old_errno;
1690
1641
return ret_errno;
1691
1642
}
1692
network.ifr_flags |= IFF_UP; /* set flag */
1643
network.ifr_flags |= IFF_UP;
1693
1644
1694
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1695
if(sd == -1){
1645
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1646
if(sd < 0){
1696
1647
ret_errno = errno;
1697
1648
perror_plus("socket");
1698
1649
errno = old_errno;
1699
1650
return ret_errno;
1700
1651
}
1701
1652
1702
1653
if(quit_now){
1703
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1704
if(ret == -1){
1705
perror_plus("close");
1706
}
1654
close(sd);
1707
1655
errno = old_errno;
1708
1656
return EINTR;
1709
1657
}
1713
1661
interface);
1714
1662
}
1715
1663
1716
/* Raise privileges */
1717
ret_errno = raise_privileges();
1718
bool restore_loglevel = false;
1719
if(ret_errno != 0){
1720
perror_plus("Failed to raise privileges");
1721
}
1664
/* Raise priviliges */
1665
raise_privileges();
1666
1722
1667
#ifdef __linux__
1723
int ret_linux;
1724
if(ret_errno == 0){
1725
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1726
messages about the network interface to mess up the prompt */
1727
ret_linux = klogctl(8, NULL, 5);
1728
if(ret_linux == -1){
1729
perror_plus("klogctl");
1730
} else {
1731
restore_loglevel = true;
1732
}
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");
1733
1675
}
1734
1676
#endif /* __linux__ */
1735
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1736
ioctl_errno = errno;
1677
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1678
ret_errno = errno;
1737
1679
#ifdef __linux__
1738
1680
if(restore_loglevel){
1739
1681
ret_linux = klogctl(7, NULL, 0);
1743
1685
}
1744
1686
#endif /* __linux__ */
1745
1687
1746
/* If raise_privileges() succeeded above */
1747
if(ret_errno == 0){
1748
/* Lower privileges */
1749
ret_errno = lower_privileges();
1750
if(ret_errno != 0){
1751
errno = ret_errno;
1752
perror_plus("Failed to lower privileges");
1753
}
1754
}
1688
/* Lower privileges */
1689
lower_privileges();
1755
1690
1756
1691
/* Close the socket */
1757
1692
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1760
1695
}
1761
1696
1762
1697
if(ret_setflags == -1){
1763
errno = ioctl_errno;
1698
errno = ret_errno;
1764
1699
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1765
1700
errno = old_errno;
1766
return ioctl_errno;
1701
return ret_errno;
1767
1702
}
1768
1703
} else if(debug){
1769
1704
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1787
1722
return 0;
1788
1723
}
1789
1724
1790
__attribute__((nonnull, warn_unused_result))
1791
1725
error_t take_down_interface(const char *const interface){
1726
int sd = -1;
1792
1727
error_t old_errno = errno;
1728
error_t ret_errno = 0;
1729
int ret, ret_setflags;
1793
1730
struct ifreq network;
1794
1731
unsigned int if_index = if_nametoindex(interface);
1795
1732
if(if_index == 0){
1798
1735
return ENXIO;
1799
1736
}
1800
1737
if(interface_is_up(interface)){
1801
error_t ret_errno = 0, ioctl_errno = 0;
1802
1738
if(not get_flags(interface, &network) and debug){
1803
1739
ret_errno = errno;
1804
1740
fprintf_plus(stderr, "Failed to get flags for interface "
1805
1741
"\"%s\"\n", interface);
1806
errno = old_errno;
1807
1742
return ret_errno;
1808
1743
}
1809
1744
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1810
1745
1811
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1812
if(sd == -1){
1746
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1747
if(sd < 0){
1813
1748
ret_errno = errno;
1814
1749
perror_plus("socket");
1815
1750
errno = old_errno;
1821
1756
interface);
1822
1757
}
1823
1758
1824
/* Raise privileges */
1825
ret_errno = raise_privileges();
1826
if(ret_errno != 0){
1827
perror_plus("Failed to raise privileges");
1828
}
1829
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1830
ioctl_errno = errno;
1831
1832
/* If raise_privileges() succeeded above */
1833
if(ret_errno == 0){
1834
/* Lower privileges */
1835
ret_errno = lower_privileges();
1836
if(ret_errno != 0){
1837
errno = ret_errno;
1838
perror_plus("Failed to lower privileges");
1839
}
1840
}
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();
1841
1767
1842
1768
/* Close the socket */
1843
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
1769
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1844
1770
if(ret == -1){
1845
1771
perror_plus("close");
1846
1772
}
1847
1773
1848
1774
if(ret_setflags == -1){
1849
errno = ioctl_errno;
1775
errno = ret_errno;
1850
1776
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1851
1777
errno = old_errno;
1852
return ioctl_errno;
1778
return ret_errno;
1853
1779
}
1854
1780
} else if(debug){
1855
1781
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1863
1789
int main(int argc, char *argv[]){
1864
1790
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1865
1791
.priority = "SECURE256:!CTYPE-X.509:"
1866
"+CTYPE-OPENPGP", .current_server = NULL,
1792
"+CTYPE-OPENPGP", .current_server = NULL,
1867
1793
.interfaces = NULL, .interfaces_size = 0 };
1868
1794
AvahiSServiceBrowser *sb = NULL;
1869
1795
error_t ret_errno;
1873
1799
int exitcode = EXIT_SUCCESS;
1874
1800
char *interfaces_to_take_down = NULL;
1875
1801
size_t interfaces_to_take_down_size = 0;
1876
char run_tempdir[] = "/run/tmp/mandosXXXXXX";
1877
char old_tempdir[] = "/tmp/mandosXXXXXX";
1878
char *tempdir = NULL;
1802
char tempdir[] = "/tmp/mandosXXXXXX";
1803
bool tempdir_created = false;
1879
1804
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1880
1805
const char *seckey = PATHDIR "/" SECKEY;
1881
1806
const char *pubkey = PATHDIR "/" PUBKEY;
1882
1807
char *interfaces_hooks = NULL;
1808
size_t interfaces_hooks_size = 0;
1883
1809
1884
1810
bool gnutls_initialized = false;
1885
1811
bool gpgme_initialized = false;
2063
1989
/* Work around Debian bug #633582:
2064
1990
<http://bugs.debian.org/633582> */
2065
1991
2066
/* Re-raise privileges */
2067
ret_errno = raise_privileges();
2068
if(ret_errno != 0){
2069
errno = ret_errno;
2070
perror_plus("Failed to raise privileges");
2071
} else {
1992
/* Re-raise priviliges */
1993
if(raise_privileges() == 0){
2072
1994
struct stat st;
2073
1995
2074
1996
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2114
2036
}
2115
2037
2116
2038
/* Lower privileges */
2117
ret_errno = lower_privileges();
2118
if(ret_errno != 0){
2119
errno = ret_errno;
2120
perror_plus("Failed to lower privileges");
2121
}
2039
lower_privileges();
2122
2040
}
2123
2041
}
2124
2042
2148
2066
goto end;
2149
2067
}
2150
2068
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2151
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2152
}
2153
run_network_hooks("start", interfaces_hooks != NULL ?
2154
interfaces_hooks : "", delay);
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
}
2155
2077
}
2156
2078
2157
2079
if(not debug){
2245
2167
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2246
2168
direntries[i]->d_name);
2247
2169
if(ret_errno != 0){
2248
errno = ret_errno;
2249
2170
perror_plus("argz_add");
2250
2171
continue;
2251
2172
}
2285
2206
break;
2286
2207
}
2287
2208
bool interface_was_up = interface_is_up(interface);
2288
errno = bring_up_interface(interface, delay);
2209
ret = bring_up_interface(interface, delay);
2289
2210
if(not interface_was_up){
2290
if(errno != 0){
2211
if(ret != 0){
2212
errno = ret;
2291
2213
perror_plus("Failed to bring up interface");
2292
2214
} else {
2293
errno = argz_add(&interfaces_to_take_down,
2294
&interfaces_to_take_down_size,
2295
interface);
2296
if(errno != 0){
2297
perror_plus("argz_add");
2298
}
2215
ret_errno = argz_add(&interfaces_to_take_down,
2216
&interfaces_to_take_down_size,
2217
interface);
2299
2218
}
2300
2219
}
2301
2220
}
2330
2249
goto end;
2331
2250
}
2332
2251
2333
/* Try /run/tmp before /tmp */
2334
tempdir = mkdtemp(run_tempdir);
2335
if(tempdir == NULL and errno == ENOENT){
2336
if(debug){
2337
fprintf_plus(stderr, "Tempdir %s did not work, trying %s\n",
2338
run_tempdir, old_tempdir);
2339
}
2340
tempdir = mkdtemp(old_tempdir);
2341
}
2342
if(tempdir == NULL){
2252
if(mkdtemp(tempdir) == NULL){
2343
2253
perror_plus("mkdtemp");
2344
2254
goto end;
2345
2255
}
2256
tempdir_created = true;
2346
2257
2347
2258
if(quit_now){
2348
2259
goto end;
2423
2334
sleep((unsigned int)retry_interval);
2424
2335
}
2425
2336
2426
if(not quit_now){
2337
if (not quit_now){
2427
2338
exitcode = EXIT_SUCCESS;
2428
2339
}
2429
2340
2531
2442
}
2532
2443
}
2533
2444
2534
/* Re-raise privileges */
2445
/* Re-raise priviliges */
2535
2446
{
2536
ret_errno = raise_privileges();
2537
if(ret_errno != 0){
2538
perror_plus("Failed to raise privileges");
2539
} else {
2540
2541
/* Run network hooks */
2542
run_network_hooks("stop", interfaces_hooks != NULL ?
2543
interfaces_hooks : "", delay);
2544
2545
/* Take down the network interfaces which were brought up */
2546
{
2547
char *interface = NULL;
2548
while((interface=argz_next(interfaces_to_take_down,
2549
interfaces_to_take_down_size,
2550
interface))){
2551
ret_errno = take_down_interface(interface);
2552
if(ret_errno != 0){
2553
errno = ret_errno;
2554
perror_plus("Failed to take down interface");
2555
}
2556
}
2557
if(debug and (interfaces_to_take_down == NULL)){
2558
fprintf_plus(stderr, "No interfaces needed to be taken"
2559
" down\n");
2560
}
2561
}
2562
}
2563
ret_errno = lower_privileges_permanently();
2564
if(ret_errno != 0){
2565
perror_plus("Failed to lower privileges permanently");
2566
}
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();
2567
2472
}
2568
2473
2569
2474
free(interfaces_to_take_down);
2570
2475
free(interfaces_hooks);
2571
2476
2572
2477
/* Removes the GPGME temp directory and all files inside */
2573
if(tempdir != NULL){
2478
if(tempdir_created){
2574
2479
struct dirent **direntries = NULL;
2575
2480
struct dirent *direntry = NULL;
2576
2481
int numentries = scandir(tempdir, &direntries, notdotentries,
2577
2482
alphasort);
2578
if(numentries > 0){
2483
if (numentries > 0){
2579
2484
for(int i = 0; i < numentries; i++){
2580
2485
direntry = direntries[i];
2581
2486
char *fullname = NULL;
2596
2501
2597
2502
/* need to clean even if 0 because man page doesn't specify */
2598
2503
free(direntries);
2599
if(numentries == -1){
2504
if (numentries == -1){
2600
2505
perror_plus("scandir");
2601
2506
}
2602
2507
ret = rmdir(tempdir);
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0