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- Committer: Teddy Hogeborn
- Date: 2014-01-06 15:56:54 UTC
- Revision ID: teddy@recompile.se-20140106155654-urx23ytuvy0nxzwp
Update init script to modern standards.
* init.d-mandos (status): Moved to standard location. Re-added use of
-p switch compared to skeleton file.
(*): Update message to include "status".
* init.d-mandos (status): Moved to standard location. Re-added use of
-p switch compared to skeleton file.
(*): Update message to include "status".
- files removed:
- debian/upstream
- files modified:
- Makefile
added
removed
plugins.d/mandos-client.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008-2014 Teddy Hogeborn
13
* Copyright © 2008-2014 Björn Påhlsson
12
* Copyright © 2008-2013 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
32
32
/* Needed by GPGME, specifically gpgme_data_seek() */
33
33
#ifndef _LARGEFILE_SOURCE
34
34
#define _LARGEFILE_SOURCE
35
#endif /* not _LARGEFILE_SOURCE */
35
#endif
36
36
#ifndef _FILE_OFFSET_BITS
37
37
#define _FILE_OFFSET_BITS 64
38
#endif /* not _FILE_OFFSET_BITS */
38
#endif
39
39
40
40
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
41
41
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() */
141
138
static const char sys_class_net[] = "/sys/class/net";
142
139
char *connect_to = NULL;
143
140
const char *hookdir = HOOKDIR;
144
int hookdir_fd = -1;
145
141
uid_t uid = 65534;
146
142
gid_t gid = 65534;
147
143
184
180
perror(print_text);
185
181
}
186
182
187
__attribute__((format (gnu_printf, 2, 3), nonnull))
183
__attribute__((format (gnu_printf, 2, 3)))
188
184
int fprintf_plus(FILE *stream, const char *format, ...){
189
185
va_list ap;
190
186
va_start (ap, format);
199
195
* bytes. "buffer_capacity" is how much is currently allocated,
200
196
* "buffer_length" is how much is already used.
201
197
*/
202
__attribute__((nonnull, warn_unused_result))
203
198
size_t incbuffer(char **buffer, size_t buffer_length,
204
199
size_t buffer_capacity){
205
200
if(buffer_length + BUFFER_SIZE > buffer_capacity){
206
char *new_buf = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
207
if(new_buf == NULL){
208
int old_errno = errno;
209
free(*buffer);
210
errno = old_errno;
211
*buffer = NULL;
201
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
202
if(buffer == NULL){
212
203
return 0;
213
204
}
214
*buffer = new_buf;
215
205
buffer_capacity += BUFFER_SIZE;
216
206
}
217
207
return buffer_capacity;
218
208
}
219
209
220
210
/* Add server to set of servers to retry periodically */
221
__attribute__((nonnull, warn_unused_result))
222
211
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
223
212
int af, server **current_server){
224
213
int ret;
235
224
perror_plus("strdup");
236
225
return false;
237
226
}
238
ret = clock_gettime(CLOCK_MONOTONIC, &(new_server->last_seen));
239
if(ret == -1){
240
perror_plus("clock_gettime");
241
return false;
242
}
243
227
/* Special case of first server */
244
228
if(*current_server == NULL){
245
229
new_server->next = new_server;
246
230
new_server->prev = new_server;
247
231
*current_server = new_server;
232
/* Place the new server last in the list */
248
233
} else {
249
/* Place the new server last in the list */
250
234
new_server->next = *current_server;
251
235
new_server->prev = (*current_server)->prev;
252
236
new_server->prev->next = new_server;
253
237
(*current_server)->prev = new_server;
254
238
}
239
ret = clock_gettime(CLOCK_MONOTONIC, &(*current_server)->last_seen);
240
if(ret == -1){
241
perror_plus("clock_gettime");
242
return false;
243
}
255
244
return true;
256
245
}
257
246
258
247
/*
259
248
* Initialize GPGME.
260
249
*/
261
__attribute__((nonnull, warn_unused_result))
262
static bool init_gpgme(const char * const seckey,
263
const char * const pubkey,
264
const char * const tempdir,
265
mandos_context *mc){
250
static bool init_gpgme(const char *seckey, const char *pubkey,
251
const char *tempdir, mandos_context *mc){
266
252
gpgme_error_t rc;
267
253
gpgme_engine_info_t engine_info;
268
254
269
255
/*
270
256
* Helper function to insert pub and seckey to the engine keyring.
271
257
*/
272
bool import_key(const char * const filename){
258
bool import_key(const char *filename){
273
259
int ret;
274
260
int fd;
275
261
gpgme_data_t pgp_data;
356
342
* Decrypt OpenPGP data.
357
343
* Returns -1 on error
358
344
*/
359
__attribute__((nonnull, warn_unused_result))
360
345
static ssize_t pgp_packet_decrypt(const char *cryptotext,
361
346
size_t crypto_size,
362
347
char **plaintext,
482
467
return plaintext_length;
483
468
}
484
469
485
__attribute__((warn_unused_result))
486
static const char *safer_gnutls_strerror(int value){
470
static const char * safer_gnutls_strerror(int value){
487
471
const char *ret = gnutls_strerror(value);
488
472
if(ret == NULL)
489
473
ret = "(unknown)";
491
475
}
492
476
493
477
/* GnuTLS log function callback */
494
__attribute__((nonnull))
495
478
static void debuggnutls(__attribute__((unused)) int level,
496
479
const char* string){
497
480
fprintf_plus(stderr, "GnuTLS: %s", string);
498
481
}
499
482
500
__attribute__((nonnull, warn_unused_result))
501
483
static int init_gnutls_global(const char *pubkeyfilename,
502
484
const char *seckeyfilename,
503
485
mandos_context *mc){
577
559
return -1;
578
560
}
579
561
580
__attribute__((nonnull, warn_unused_result))
581
562
static int init_gnutls_session(gnutls_session_t *session,
582
563
mandos_context *mc){
583
564
int ret;
640
621
__attribute__((unused)) const char *txt){}
641
622
642
623
/* Called when a Mandos server is found */
643
__attribute__((nonnull, warn_unused_result))
644
624
static int start_mandos_communication(const char *ip, in_port_t port,
645
625
AvahiIfIndex if_index,
646
626
int af, mandos_context *mc){
647
627
int ret, tcp_sd = -1;
648
628
ssize_t sret;
649
struct sockaddr_storage to;
629
union {
630
struct sockaddr_in in;
631
struct sockaddr_in6 in6;
632
} to;
650
633
char *buffer = NULL;
651
634
char *decrypted_buffer = NULL;
652
635
size_t buffer_length = 0;
733
716
734
717
memset(&to, 0, sizeof(to));
735
718
if(af == AF_INET6){
736
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
737
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);
738
721
} else { /* IPv4 */
739
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
740
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);
741
724
}
742
725
if(ret < 0 ){
743
726
int e = errno;
752
735
goto mandos_end;
753
736
}
754
737
if(af == AF_INET6){
755
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
756
if(IN6_IS_ADDR_LINKLOCAL
757
(&((struct sockaddr_in6 *)&to)->sin6_addr)){
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
758
748
if(if_index == AVAHI_IF_UNSPEC){
759
749
fprintf_plus(stderr, "An IPv6 link-local address is"
760
750
" incomplete without a network interface\n");
762
752
goto mandos_end;
763
753
}
764
754
/* Set the network interface number as scope */
765
((struct sockaddr_in6 *)&to)->sin6_scope_id = (uint32_t)if_index;
755
to.in6.sin6_scope_id = (uint32_t)if_index;
766
756
}
767
757
} else {
768
((struct sockaddr_in *)&to)->sin_port = htons(port);
758
to.in.sin_port = htons(port);
769
759
}
770
760
771
761
if(quit_now){
788
778
}
789
779
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
790
780
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
781
const char *pcret;
791
782
if(af == AF_INET6){
792
ret = getnameinfo((struct sockaddr *)&to,
793
sizeof(struct sockaddr_in6),
794
addrstr, sizeof(addrstr), NULL, 0,
795
NI_NUMERICHOST);
783
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
784
sizeof(addrstr));
796
785
} else {
797
ret = getnameinfo((struct sockaddr *)&to,
798
sizeof(struct sockaddr_in),
799
addrstr, sizeof(addrstr), NULL, 0,
800
NI_NUMERICHOST);
786
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
787
sizeof(addrstr));
801
788
}
802
if(ret == EAI_SYSTEM){
803
perror_plus("getnameinfo");
804
} else if(ret != 0) {
805
fprintf_plus(stderr, "getnameinfo: %s", gai_strerror(ret));
806
} else if(strcmp(addrstr, ip) != 0){
807
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
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
}
808
795
}
809
796
}
810
797
814
801
}
815
802
816
803
if(af == AF_INET6){
817
ret = connect(tcp_sd, (struct sockaddr *)&to,
818
sizeof(struct sockaddr_in6));
804
ret = connect(tcp_sd, &to.in6, sizeof(to));
819
805
} else {
820
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
821
sizeof(struct sockaddr_in));
806
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
822
807
}
823
808
if(ret < 0){
824
if((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
809
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
825
810
int e = errno;
826
811
perror_plus("connect");
827
812
errno = e;
1042
1027
return retval;
1043
1028
}
1044
1029
1045
__attribute__((nonnull))
1046
1030
static void resolve_callback(AvahiSServiceResolver *r,
1047
1031
AvahiIfIndex interface,
1048
1032
AvahiProtocol proto,
1056
1040
AVAHI_GCC_UNUSED AvahiStringList *txt,
1057
1041
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1058
1042
flags,
1059
void *mc){
1043
void* mc){
1060
1044
if(r == NULL){
1061
1045
return;
1062
1046
}
1115
1099
const char *domain,
1116
1100
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1117
1101
flags,
1118
void *mc){
1102
void* mc){
1119
1103
if(b == NULL){
1120
1104
return;
1121
1105
}
1181
1165
errno = old_errno;
1182
1166
}
1183
1167
1184
__attribute__((nonnull, warn_unused_result))
1185
1168
bool get_flags(const char *ifname, struct ifreq *ifr){
1186
1169
int ret;
1187
1170
error_t ret_errno;
1206
1189
return true;
1207
1190
}
1208
1191
1209
__attribute__((nonnull, warn_unused_result))
1210
1192
bool good_flags(const char *ifname, const struct ifreq *ifr){
1211
1193
1212
1194
/* Reject the loopback device */
1254
1236
* corresponds to an acceptable network device.
1255
1237
* (This function is passed to scandir(3) as a filter function.)
1256
1238
*/
1257
__attribute__((nonnull, warn_unused_result))
1258
1239
int good_interface(const struct dirent *if_entry){
1259
1240
if(if_entry->d_name[0] == '.'){
1260
1241
return 0;
1278
1259
/*
1279
1260
* This function determines if a network interface is up.
1280
1261
*/
1281
__attribute__((nonnull, warn_unused_result))
1282
1262
bool interface_is_up(const char *interface){
1283
1263
struct ifreq ifr;
1284
1264
if(not get_flags(interface, &ifr)){
1295
1275
/*
1296
1276
* This function determines if a network interface is running
1297
1277
*/
1298
__attribute__((nonnull, warn_unused_result))
1299
1278
bool interface_is_running(const char *interface){
1300
1279
struct ifreq ifr;
1301
1280
if(not get_flags(interface, &ifr)){
1309
1288
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1310
1289
}
1311
1290
1312
__attribute__((nonnull, pure, warn_unused_result))
1313
1291
int notdotentries(const struct dirent *direntry){
1314
1292
/* Skip "." and ".." */
1315
1293
if(direntry->d_name[0] == '.'
1322
1300
}
1323
1301
1324
1302
/* Is this directory entry a runnable program? */
1325
__attribute__((nonnull, warn_unused_result))
1326
1303
int runnable_hook(const struct dirent *direntry){
1327
1304
int ret;
1328
1305
size_t sret;
1336
1313
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1337
1314
"abcdefghijklmnopqrstuvwxyz"
1338
1315
"0123456789"
1339
"_.-");
1316
"_-");
1340
1317
if((direntry->d_name)[sret] != '\0'){
1341
1318
/* Contains non-allowed characters */
1342
1319
if(debug){
1360
1337
}
1361
1338
return 0;
1362
1339
}
1363
free(fullname);
1364
1340
if(not (S_ISREG(st.st_mode))){
1365
1341
/* Not a regular file */
1366
1342
if(debug){
1384
1360
return 1;
1385
1361
}
1386
1362
1387
__attribute__((nonnull, warn_unused_result))
1388
1363
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1389
1364
mandos_context *mc){
1390
1365
int ret;
1394
1369
1395
1370
while(true){
1396
1371
if(mc->current_server == NULL){
1397
if(debug){
1372
if (debug){
1398
1373
fprintf_plus(stderr, "Wait until first server is found."
1399
1374
" No timeout!\n");
1400
1375
}
1401
1376
ret = avahi_simple_poll_iterate(s, -1);
1402
1377
} else {
1403
if(debug){
1378
if (debug){
1404
1379
fprintf_plus(stderr, "Check current_server if we should run"
1405
1380
" it, or wait\n");
1406
1381
}
1423
1398
- ((intmax_t)waited_time.tv_sec * 1000))
1424
1399
- ((intmax_t)waited_time.tv_nsec / 1000000));
1425
1400
1426
if(debug){
1401
if (debug){
1427
1402
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1428
1403
block_time);
1429
1404
}
1451
1426
ret = avahi_simple_poll_iterate(s, (int)block_time);
1452
1427
}
1453
1428
if(ret != 0){
1454
if(ret > 0 or errno != EINTR){
1429
if (ret > 0 or errno != EINTR){
1455
1430
return (ret != 1) ? ret : 0;
1456
1431
}
1457
1432
}
1459
1434
}
1460
1435
1461
1436
/* Set effective uid to 0, return errno */
1462
__attribute__((warn_unused_result))
1463
1437
error_t raise_privileges(void){
1464
1438
error_t old_errno = errno;
1465
1439
error_t ret_errno = 0;
1472
1446
}
1473
1447
1474
1448
/* Set effective and real user ID to 0. Return errno. */
1475
__attribute__((warn_unused_result))
1476
1449
error_t raise_privileges_permanently(void){
1477
1450
error_t old_errno = errno;
1478
1451
error_t ret_errno = raise_privileges();
1489
1462
}
1490
1463
1491
1464
/* Set effective user ID to unprivileged saved user ID */
1492
__attribute__((warn_unused_result))
1493
1465
error_t lower_privileges(void){
1494
1466
error_t old_errno = errno;
1495
1467
error_t ret_errno = 0;
1502
1474
}
1503
1475
1504
1476
/* Lower privileges permanently */
1505
__attribute__((warn_unused_result))
1506
1477
error_t lower_privileges_permanently(void){
1507
1478
error_t old_errno = errno;
1508
1479
error_t ret_errno = 0;
1514
1485
return ret_errno;
1515
1486
}
1516
1487
1517
#ifndef O_CLOEXEC
1518
/*
1519
* Based on the example in the GNU LibC manual chapter 13.13 "File
1520
* Descriptor Flags".
1521
| [[info:libc:Descriptor%20Flags][File Descriptor Flags]] |
1522
*/
1523
__attribute__((warn_unused_result))
1524
static int set_cloexec_flag(int fd){
1525
int ret = (int)TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD, 0));
1526
/* If reading the flags failed, return error indication now. */
1527
if(ret < 0){
1528
return ret;
1529
}
1530
/* Store modified flag word in the descriptor. */
1531
return (int)TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD,
1532
ret | FD_CLOEXEC));
1533
}
1534
#endif /* not O_CLOEXEC */
1535
1536
__attribute__((nonnull))
1537
void run_network_hooks(const char *mode, const char *interface,
1488
bool run_network_hooks(const char *mode, const char *interface,
1538
1489
const float delay){
1539
1490
struct dirent **direntries;
1540
if(hookdir_fd == -1){
1541
hookdir_fd = open(hookdir, O_RDONLY |
1542
#ifdef O_CLOEXEC
1543
O_CLOEXEC
1544
#else /* not O_CLOEXEC */
1545
0
1546
#endif /* not O_CLOEXEC */
1547
);
1548
if(hookdir_fd == -1){
1549
if(errno == ENOENT){
1550
if(debug){
1551
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1552
" found\n", hookdir);
1553
}
1554
} else {
1555
perror_plus("open");
1556
}
1557
return;
1558
}
1559
#ifndef O_CLOEXEC
1560
if(set_cloexec_flag(hookdir_fd) < 0){
1561
perror_plus("set_cloexec_flag");
1562
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1563
perror_plus("close");
1564
} else {
1565
hookdir_fd = -1;
1566
}
1567
return;
1568
}
1569
#endif /* not O_CLOEXEC */
1570
}
1571
#ifdef __GLIBC__
1572
#if __GLIBC_PREREQ(2, 15)
1573
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1574
runnable_hook, alphasort);
1575
#else /* not __GLIBC_PREREQ(2, 15) */
1576
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1577
alphasort);
1578
#endif /* not __GLIBC_PREREQ(2, 15) */
1579
#else /* not __GLIBC__ */
1580
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1581
alphasort);
1582
#endif /* not __GLIBC__ */
1491
struct dirent *direntry;
1492
int ret;
1493
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1494
alphasort);
1583
1495
if(numhooks == -1){
1584
perror_plus("scandir");
1585
return;
1586
}
1587
struct dirent *direntry;
1588
int ret;
1589
int devnull = open("/dev/null", O_RDONLY);
1590
for(int i = 0; i < numhooks; i++){
1591
direntry = direntries[i];
1592
char *fullname = NULL;
1593
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1594
if(ret < 0){
1595
perror_plus("asprintf");
1596
continue;
1597
}
1598
if(debug){
1599
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1600
direntry->d_name);
1601
}
1602
pid_t hook_pid = fork();
1603
if(hook_pid == 0){
1604
/* Child */
1605
/* Raise privileges */
1606
if(raise_privileges_permanently() != 0){
1607
perror_plus("Failed to raise privileges");
1608
_exit(EX_NOPERM);
1609
}
1610
/* Set group */
1611
errno = 0;
1612
ret = setgid(0);
1613
if(ret == -1){
1614
perror_plus("setgid");
1615
_exit(EX_NOPERM);
1616
}
1617
/* Reset supplementary groups */
1618
errno = 0;
1619
ret = setgroups(0, NULL);
1620
if(ret == -1){
1621
perror_plus("setgroups");
1622
_exit(EX_NOPERM);
1623
}
1624
ret = dup2(devnull, STDIN_FILENO);
1625
if(ret == -1){
1626
perror_plus("dup2(devnull, STDIN_FILENO)");
1627
_exit(EX_OSERR);
1628
}
1629
ret = close(devnull);
1630
if(ret == -1){
1631
perror_plus("close");
1632
_exit(EX_OSERR);
1633
}
1634
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1635
if(ret == -1){
1636
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1637
_exit(EX_OSERR);
1638
}
1639
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1640
if(ret == -1){
1641
perror_plus("setenv");
1642
_exit(EX_OSERR);
1643
}
1644
ret = setenv("DEVICE", interface, 1);
1645
if(ret == -1){
1646
perror_plus("setenv");
1647
_exit(EX_OSERR);
1648
}
1649
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1650
if(ret == -1){
1651
perror_plus("setenv");
1652
_exit(EX_OSERR);
1653
}
1654
ret = setenv("MODE", mode, 1);
1655
if(ret == -1){
1656
perror_plus("setenv");
1657
_exit(EX_OSERR);
1658
}
1659
char *delaystring;
1660
ret = asprintf(&delaystring, "%f", (double)delay);
1661
if(ret == -1){
1496
if(errno == ENOENT){
1497
if(debug){
1498
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1499
" found\n", hookdir);
1500
}
1501
} else {
1502
perror_plus("scandir");
1503
}
1504
} else {
1505
int devnull = open("/dev/null", O_RDONLY);
1506
for(int i = 0; i < numhooks; i++){
1507
direntry = direntries[i];
1508
char *fullname = NULL;
1509
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1510
if(ret < 0){
1662
1511
perror_plus("asprintf");
1663
_exit(EX_OSERR);
1664
}
1665
ret = setenv("DELAY", delaystring, 1);
1666
if(ret == -1){
1512
continue;
1513
}
1514
if(debug){
1515
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1516
direntry->d_name);
1517
}
1518
pid_t hook_pid = fork();
1519
if(hook_pid == 0){
1520
/* Child */
1521
/* Raise privileges */
1522
raise_privileges_permanently();
1523
/* Set group */
1524
errno = 0;
1525
ret = setgid(0);
1526
if(ret == -1){
1527
perror_plus("setgid");
1528
}
1529
/* Reset supplementary groups */
1530
errno = 0;
1531
ret = setgroups(0, NULL);
1532
if(ret == -1){
1533
perror_plus("setgroups");
1534
}
1535
dup2(devnull, STDIN_FILENO);
1536
close(devnull);
1537
dup2(STDERR_FILENO, STDOUT_FILENO);
1538
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1539
if(ret == -1){
1540
perror_plus("setenv");
1541
_exit(EX_OSERR);
1542
}
1543
ret = setenv("DEVICE", interface, 1);
1544
if(ret == -1){
1545
perror_plus("setenv");
1546
_exit(EX_OSERR);
1547
}
1548
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1549
if(ret == -1){
1550
perror_plus("setenv");
1551
_exit(EX_OSERR);
1552
}
1553
ret = setenv("MODE", mode, 1);
1554
if(ret == -1){
1555
perror_plus("setenv");
1556
_exit(EX_OSERR);
1557
}
1558
char *delaystring;
1559
ret = asprintf(&delaystring, "%f", delay);
1560
if(ret == -1){
1561
perror_plus("asprintf");
1562
_exit(EX_OSERR);
1563
}
1564
ret = setenv("DELAY", delaystring, 1);
1565
if(ret == -1){
1566
free(delaystring);
1567
perror_plus("setenv");
1568
_exit(EX_OSERR);
1569
}
1667
1570
free(delaystring);
1668
perror_plus("setenv");
1669
_exit(EX_OSERR);
1670
}
1671
free(delaystring);
1672
if(connect_to != NULL){
1673
ret = setenv("CONNECT", connect_to, 1);
1674
if(ret == -1){
1675
perror_plus("setenv");
1676
_exit(EX_OSERR);
1677
}
1678
}
1679
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1680
perror_plus("execl");
1681
_exit(EXIT_FAILURE);
1682
}
1683
} else {
1684
int status;
1685
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1686
perror_plus("waitpid");
1687
free(fullname);
1688
continue;
1689
}
1690
if(WIFEXITED(status)){
1691
if(WEXITSTATUS(status) != 0){
1692
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1693
" with status %d\n", direntry->d_name,
1694
WEXITSTATUS(status));
1695
free(fullname);
1696
continue;
1697
}
1698
} else if(WIFSIGNALED(status)){
1699
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1700
" signal %d\n", direntry->d_name,
1701
WTERMSIG(status));
1702
free(fullname);
1703
continue;
1571
if(connect_to != NULL){
1572
ret = setenv("CONNECT", connect_to, 1);
1573
if(ret == -1){
1574
perror_plus("setenv");
1575
_exit(EX_OSERR);
1576
}
1577
}
1578
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1579
perror_plus("execl");
1580
_exit(EXIT_FAILURE);
1581
}
1704
1582
} else {
1705
fprintf_plus(stderr, "Warning: network hook \"%s\""
1706
" crashed\n", direntry->d_name);
1707
free(fullname);
1708
continue;
1709
}
1710
}
1711
free(fullname);
1712
if(debug){
1713
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1714
direntry->d_name);
1715
}
1716
}
1717
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1718
perror_plus("close");
1719
} else {
1720
hookdir_fd = -1;
1721
}
1722
close(devnull);
1583
int status;
1584
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1585
perror_plus("waitpid");
1586
free(fullname);
1587
continue;
1588
}
1589
if(WIFEXITED(status)){
1590
if(WEXITSTATUS(status) != 0){
1591
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1592
" with status %d\n", direntry->d_name,
1593
WEXITSTATUS(status));
1594
free(fullname);
1595
continue;
1596
}
1597
} else if(WIFSIGNALED(status)){
1598
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1599
" signal %d\n", direntry->d_name,
1600
WTERMSIG(status));
1601
free(fullname);
1602
continue;
1603
} else {
1604
fprintf_plus(stderr, "Warning: network hook \"%s\""
1605
" crashed\n", direntry->d_name);
1606
free(fullname);
1607
continue;
1608
}
1609
}
1610
free(fullname);
1611
if(debug){
1612
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1613
direntry->d_name);
1614
}
1615
}
1616
close(devnull);
1617
}
1618
return true;
1723
1619
}
1724
1620
1725
__attribute__((nonnull, warn_unused_result))
1726
1621
error_t bring_up_interface(const char *const interface,
1727
1622
const float delay){
1623
int sd = -1;
1728
1624
error_t old_errno = errno;
1729
int ret;
1625
error_t ret_errno = 0;
1626
int ret, ret_setflags;
1730
1627
struct ifreq network;
1731
1628
unsigned int if_index = if_nametoindex(interface);
1732
1629
if(if_index == 0){
1741
1638
}
1742
1639
1743
1640
if(not interface_is_up(interface)){
1744
error_t ret_errno = 0, ioctl_errno = 0;
1745
if(not get_flags(interface, &network)){
1641
if(not get_flags(interface, &network) and debug){
1746
1642
ret_errno = errno;
1747
1643
fprintf_plus(stderr, "Failed to get flags for interface "
1748
1644
"\"%s\"\n", interface);
1749
errno = old_errno;
1750
1645
return ret_errno;
1751
1646
}
1752
network.ifr_flags |= IFF_UP; /* set flag */
1647
network.ifr_flags |= IFF_UP;
1753
1648
1754
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1755
if(sd == -1){
1649
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1650
if(sd < 0){
1756
1651
ret_errno = errno;
1757
1652
perror_plus("socket");
1758
1653
errno = old_errno;
1759
1654
return ret_errno;
1760
1655
}
1761
1656
1762
1657
if(quit_now){
1763
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1764
if(ret == -1){
1765
perror_plus("close");
1766
}
1658
close(sd);
1767
1659
errno = old_errno;
1768
1660
return EINTR;
1769
1661
}
1773
1665
interface);
1774
1666
}
1775
1667
1776
/* Raise privileges */
1777
ret_errno = raise_privileges();
1778
if(ret_errno != 0){
1779
perror_plus("Failed to raise privileges");
1780
}
1668
/* Raise priviliges */
1669
raise_privileges();
1781
1670
1782
1671
#ifdef __linux__
1783
int ret_linux;
1784
bool restore_loglevel = false;
1785
if(ret_errno == 0){
1786
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1787
messages about the network interface to mess up the prompt */
1788
ret_linux = klogctl(8, NULL, 5);
1789
if(ret_linux == -1){
1790
perror_plus("klogctl");
1791
} else {
1792
restore_loglevel = true;
1793
}
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");
1794
1679
}
1795
1680
#endif /* __linux__ */
1796
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1797
ioctl_errno = errno;
1681
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1682
ret_errno = errno;
1798
1683
#ifdef __linux__
1799
1684
if(restore_loglevel){
1800
1685
ret_linux = klogctl(7, NULL, 0);
1804
1689
}
1805
1690
#endif /* __linux__ */
1806
1691
1807
/* If raise_privileges() succeeded above */
1808
if(ret_errno == 0){
1809
/* Lower privileges */
1810
ret_errno = lower_privileges();
1811
if(ret_errno != 0){
1812
errno = ret_errno;
1813
perror_plus("Failed to lower privileges");
1814
}
1815
}
1692
/* Lower privileges */
1693
lower_privileges();
1816
1694
1817
1695
/* Close the socket */
1818
1696
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1821
1699
}
1822
1700
1823
1701
if(ret_setflags == -1){
1824
errno = ioctl_errno;
1702
errno = ret_errno;
1825
1703
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1826
1704
errno = old_errno;
1827
return ioctl_errno;
1705
return ret_errno;
1828
1706
}
1829
1707
} else if(debug){
1830
1708
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1848
1726
return 0;
1849
1727
}
1850
1728
1851
__attribute__((nonnull, warn_unused_result))
1852
1729
error_t take_down_interface(const char *const interface){
1730
int sd = -1;
1853
1731
error_t old_errno = errno;
1732
error_t ret_errno = 0;
1733
int ret, ret_setflags;
1854
1734
struct ifreq network;
1855
1735
unsigned int if_index = if_nametoindex(interface);
1856
1736
if(if_index == 0){
1859
1739
return ENXIO;
1860
1740
}
1861
1741
if(interface_is_up(interface)){
1862
error_t ret_errno = 0, ioctl_errno = 0;
1863
1742
if(not get_flags(interface, &network) and debug){
1864
1743
ret_errno = errno;
1865
1744
fprintf_plus(stderr, "Failed to get flags for interface "
1866
1745
"\"%s\"\n", interface);
1867
errno = old_errno;
1868
1746
return ret_errno;
1869
1747
}
1870
1748
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1871
1749
1872
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1873
if(sd == -1){
1750
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1751
if(sd < 0){
1874
1752
ret_errno = errno;
1875
1753
perror_plus("socket");
1876
1754
errno = old_errno;
1882
1760
interface);
1883
1761
}
1884
1762
1885
/* Raise privileges */
1886
ret_errno = raise_privileges();
1887
if(ret_errno != 0){
1888
perror_plus("Failed to raise privileges");
1889
}
1890
1891
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1892
ioctl_errno = errno;
1893
1894
/* If raise_privileges() succeeded above */
1895
if(ret_errno == 0){
1896
/* Lower privileges */
1897
ret_errno = lower_privileges();
1898
if(ret_errno != 0){
1899
errno = ret_errno;
1900
perror_plus("Failed to lower privileges");
1901
}
1902
}
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();
1903
1771
1904
1772
/* Close the socket */
1905
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
1773
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1906
1774
if(ret == -1){
1907
1775
perror_plus("close");
1908
1776
}
1909
1777
1910
1778
if(ret_setflags == -1){
1911
errno = ioctl_errno;
1779
errno = ret_errno;
1912
1780
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1913
1781
errno = old_errno;
1914
return ioctl_errno;
1782
return ret_errno;
1915
1783
}
1916
1784
} else if(debug){
1917
1785
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1925
1793
int main(int argc, char *argv[]){
1926
1794
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1927
1795
.priority = "SECURE256:!CTYPE-X.509:"
1928
"+CTYPE-OPENPGP", .current_server = NULL,
1796
"+CTYPE-OPENPGP", .current_server = NULL,
1929
1797
.interfaces = NULL, .interfaces_size = 0 };
1930
1798
AvahiSServiceBrowser *sb = NULL;
1931
1799
error_t ret_errno;
1935
1803
int exitcode = EXIT_SUCCESS;
1936
1804
char *interfaces_to_take_down = NULL;
1937
1805
size_t interfaces_to_take_down_size = 0;
1938
char run_tempdir[] = "/run/tmp/mandosXXXXXX";
1939
char old_tempdir[] = "/tmp/mandosXXXXXX";
1940
char *tempdir = NULL;
1806
char tempdir[] = "/tmp/mandosXXXXXX";
1807
bool tempdir_created = false;
1941
1808
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1942
1809
const char *seckey = PATHDIR "/" SECKEY;
1943
1810
const char *pubkey = PATHDIR "/" PUBKEY;
1944
1811
char *interfaces_hooks = NULL;
1812
size_t interfaces_hooks_size = 0;
1945
1813
1946
1814
bool gnutls_initialized = false;
1947
1815
bool gpgme_initialized = false;
2125
1993
/* Work around Debian bug #633582:
2126
1994
<http://bugs.debian.org/633582> */
2127
1995
2128
/* Re-raise privileges */
2129
ret_errno = raise_privileges();
2130
if(ret_errno != 0){
2131
errno = ret_errno;
2132
perror_plus("Failed to raise privileges");
2133
} else {
1996
/* Re-raise priviliges */
1997
if(raise_privileges() == 0){
2134
1998
struct stat st;
2135
1999
2136
2000
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2176
2040
}
2177
2041
2178
2042
/* Lower privileges */
2179
ret_errno = lower_privileges();
2180
if(ret_errno != 0){
2181
errno = ret_errno;
2182
perror_plus("Failed to lower privileges");
2183
}
2043
lower_privileges();
2184
2044
}
2185
2045
}
2186
2046
2210
2070
goto end;
2211
2071
}
2212
2072
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2213
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2214
}
2215
run_network_hooks("start", interfaces_hooks != NULL ?
2216
interfaces_hooks : "", delay);
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
}
2217
2081
}
2218
2082
2219
2083
if(not debug){
2307
2171
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2308
2172
direntries[i]->d_name);
2309
2173
if(ret_errno != 0){
2310
errno = ret_errno;
2311
2174
perror_plus("argz_add");
2312
2175
continue;
2313
2176
}
2347
2210
break;
2348
2211
}
2349
2212
bool interface_was_up = interface_is_up(interface);
2350
errno = bring_up_interface(interface, delay);
2213
ret = bring_up_interface(interface, delay);
2351
2214
if(not interface_was_up){
2352
if(errno != 0){
2215
if(ret != 0){
2216
errno = ret;
2353
2217
perror_plus("Failed to bring up interface");
2354
2218
} else {
2355
errno = argz_add(&interfaces_to_take_down,
2356
&interfaces_to_take_down_size,
2357
interface);
2358
if(errno != 0){
2359
perror_plus("argz_add");
2360
}
2219
ret_errno = argz_add(&interfaces_to_take_down,
2220
&interfaces_to_take_down_size,
2221
interface);
2361
2222
}
2362
2223
}
2363
2224
}
2392
2253
goto end;
2393
2254
}
2394
2255
2395
/* Try /run/tmp before /tmp */
2396
tempdir = mkdtemp(run_tempdir);
2397
if(tempdir == NULL and errno == ENOENT){
2398
if(debug){
2399
fprintf_plus(stderr, "Tempdir %s did not work, trying %s\n",
2400
run_tempdir, old_tempdir);
2401
}
2402
tempdir = mkdtemp(old_tempdir);
2403
}
2404
if(tempdir == NULL){
2256
if(mkdtemp(tempdir) == NULL){
2405
2257
perror_plus("mkdtemp");
2406
2258
goto end;
2407
2259
}
2260
tempdir_created = true;
2408
2261
2409
2262
if(quit_now){
2410
2263
goto end;
2485
2338
sleep((unsigned int)retry_interval);
2486
2339
}
2487
2340
2488
if(not quit_now){
2341
if (not quit_now){
2489
2342
exitcode = EXIT_SUCCESS;
2490
2343
}
2491
2344
2546
2399
if(debug){
2547
2400
fprintf_plus(stderr, "Starting Avahi loop search\n");
2548
2401
}
2549
2402
2550
2403
ret = avahi_loop_with_timeout(simple_poll,
2551
2404
(int)(retry_interval * 1000), &mc);
2552
2405
if(debug){
2593
2446
}
2594
2447
}
2595
2448
2596
/* Re-raise privileges */
2449
/* Re-raise priviliges */
2597
2450
{
2598
ret_errno = raise_privileges();
2599
if(ret_errno != 0){
2600
perror_plus("Failed to raise privileges");
2601
} else {
2602
2603
/* Run network hooks */
2604
run_network_hooks("stop", interfaces_hooks != NULL ?
2605
interfaces_hooks : "", delay);
2606
2607
/* Take down the network interfaces which were brought up */
2608
{
2609
char *interface = NULL;
2610
while((interface=argz_next(interfaces_to_take_down,
2611
interfaces_to_take_down_size,
2612
interface))){
2613
ret_errno = take_down_interface(interface);
2614
if(ret_errno != 0){
2615
errno = ret_errno;
2616
perror_plus("Failed to take down interface");
2617
}
2618
}
2619
if(debug and (interfaces_to_take_down == NULL)){
2620
fprintf_plus(stderr, "No interfaces needed to be taken"
2621
" down\n");
2622
}
2623
}
2624
}
2625
2626
ret_errno = lower_privileges_permanently();
2627
if(ret_errno != 0){
2628
perror_plus("Failed to lower privileges permanently");
2629
}
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();
2630
2476
}
2631
2477
2632
2478
free(interfaces_to_take_down);
2633
2479
free(interfaces_hooks);
2634
2480
2635
2481
/* Removes the GPGME temp directory and all files inside */
2636
if(tempdir != NULL){
2482
if(tempdir_created){
2637
2483
struct dirent **direntries = NULL;
2638
2484
struct dirent *direntry = NULL;
2639
2485
int numentries = scandir(tempdir, &direntries, notdotentries,
2640
2486
alphasort);
2641
if(numentries > 0){
2487
if (numentries > 0){
2642
2488
for(int i = 0; i < numentries; i++){
2643
2489
direntry = direntries[i];
2644
2490
char *fullname = NULL;
2656
2502
free(fullname);
2657
2503
}
2658
2504
}
2659
2505
2660
2506
/* need to clean even if 0 because man page doesn't specify */
2661
2507
free(direntries);
2662
if(numentries == -1){
2508
if (numentries == -1){
2663
2509
perror_plus("scandir");
2664
2510
}
2665
2511
ret = rmdir(tempdir);
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0