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- Committer: Teddy Hogeborn
- Date: 2012-06-16 23:25:46 UTC
- Revision ID: teddy@recompile.se-20120616232546-dcrkmnhd4yhq6mvd
* plugins.d/mandos-client (mandos_context): Moved to inside "main()".
All users changed.
(add_server): Take new "current_server" argument; all callers
changed.
(init_gpgme, pgp_packet_decrypt, init_gnutls_global,
init_gnutls_session, start_mandos_communication,
avahi_loop_with_timeout): Take new "mc" argument"; all callers
changed.
(resolve_callback, browse_callback): Handle void pointer userdata as
"mc", a pointer to
mandos_context. All callers
changed.
(main): New "mc" variable.
All users changed.
(add_server): Take new "current_server" argument; all callers
changed.
(init_gpgme, pgp_packet_decrypt, init_gnutls_global,
init_gnutls_session, start_mandos_communication,
avahi_loop_with_timeout): Take new "mc" argument"; all callers
changed.
(resolve_callback, browse_callback): Handle void pointer userdata as
"mc", a pointer to
mandos_context. All callers
changed.
(main): New "mc" variable.
- files removed:
- debian/upstream
- files modified:
- INSTALL
added
removed
plugins.d/mandos-client.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008-2014 Teddy Hogeborn
13
* Copyright © 2008-2014 Björn Påhlsson
12
* Copyright © 2008-2012 Teddy Hogeborn
13
* Copyright © 2008-2012 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
42
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
stdout, ferror() */
43
stdout, ferror(), remove() */
44
44
#include <stdint.h> /* uint16_t, uint32_t, intptr_t */
45
45
#include <stddef.h> /* NULL, size_t, ssize_t */
46
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
55
55
opendir(), DIR */
56
56
#include <sys/stat.h> /* open(), S_ISREG */
57
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
inet_pton(), connect(),
59
getnameinfo() */
60
#include <fcntl.h> /* open(), unlinkat() */
58
inet_pton(), connect() */
59
#include <fcntl.h> /* open() */
61
60
#include <dirent.h> /* opendir(), struct dirent, readdir()
62
61
*/
63
62
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
73
72
*/
74
73
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
74
getuid(), getgid(), seteuid(),
76
setgid(), pause(), _exit(),
77
unlinkat() */
78
#include <arpa/inet.h> /* inet_pton(), htons() */
75
setgid(), pause(), _exit() */
76
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
79
77
#include <iso646.h> /* not, or, and */
80
78
#include <argp.h> /* struct argp_option, error_t, struct
81
79
argp_state, struct argp,
93
91
argz_delete(), argz_append(),
94
92
argz_stringify(), argz_add(),
95
93
argz_count() */
96
#include <netdb.h> /* getnameinfo(), NI_NUMERICHOST,
97
EAI_SYSTEM, gai_strerror() */
98
94
99
95
#ifdef __linux__
100
96
#include <sys/klog.h> /* klogctl() */
142
138
static const char sys_class_net[] = "/sys/class/net";
143
139
char *connect_to = NULL;
144
140
const char *hookdir = HOOKDIR;
145
int hookdir_fd = -1;
146
141
uid_t uid = 65534;
147
142
gid_t gid = 65534;
148
143
166
161
const char *priority;
167
162
gpgme_ctx_t ctx;
168
163
server *current_server;
169
char *interfaces;
170
size_t interfaces_size;
171
164
} mandos_context;
172
165
173
166
/* global so signal handler can reach it*/
185
178
perror(print_text);
186
179
}
187
180
188
__attribute__((format (gnu_printf, 2, 3), nonnull))
181
__attribute__((format (gnu_printf, 2, 3)))
189
182
int fprintf_plus(FILE *stream, const char *format, ...){
190
183
va_list ap;
191
184
va_start (ap, format);
192
185
193
186
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
194
187
program_invocation_short_name));
195
return (int)TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
188
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
196
189
}
197
190
198
191
/*
200
193
* bytes. "buffer_capacity" is how much is currently allocated,
201
194
* "buffer_length" is how much is already used.
202
195
*/
203
__attribute__((nonnull, warn_unused_result))
204
196
size_t incbuffer(char **buffer, size_t buffer_length,
205
197
size_t buffer_capacity){
206
198
if(buffer_length + BUFFER_SIZE > buffer_capacity){
207
char *new_buf = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
208
if(new_buf == NULL){
209
int old_errno = errno;
210
free(*buffer);
211
errno = old_errno;
212
*buffer = NULL;
199
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
200
if(buffer == NULL){
213
201
return 0;
214
202
}
215
*buffer = new_buf;
216
203
buffer_capacity += BUFFER_SIZE;
217
204
}
218
205
return buffer_capacity;
219
206
}
220
207
221
208
/* Add server to set of servers to retry periodically */
222
__attribute__((nonnull, warn_unused_result))
223
209
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
224
210
int af, server **current_server){
225
211
int ret;
234
220
.af = af };
235
221
if(new_server->ip == NULL){
236
222
perror_plus("strdup");
237
free(new_server);
238
return false;
239
}
240
ret = clock_gettime(CLOCK_MONOTONIC, &(new_server->last_seen));
241
if(ret == -1){
242
perror_plus("clock_gettime");
243
free(new_server->ip);
244
free(new_server);
245
223
return false;
246
224
}
247
225
/* Special case of first server */
249
227
new_server->next = new_server;
250
228
new_server->prev = new_server;
251
229
*current_server = new_server;
230
/* Place the new server last in the list */
252
231
} else {
253
/* Place the new server last in the list */
254
232
new_server->next = *current_server;
255
233
new_server->prev = (*current_server)->prev;
256
234
new_server->prev->next = new_server;
257
235
(*current_server)->prev = new_server;
258
236
}
237
ret = clock_gettime(CLOCK_MONOTONIC, &(*current_server)->last_seen);
238
if(ret == -1){
239
perror_plus("clock_gettime");
240
return false;
241
}
259
242
return true;
260
243
}
261
244
262
245
/*
263
246
* Initialize GPGME.
264
247
*/
265
__attribute__((nonnull, warn_unused_result))
266
static bool init_gpgme(const char * const seckey,
267
const char * const pubkey,
268
const char * const tempdir,
269
mandos_context *mc){
248
static bool init_gpgme(const char *seckey, const char *pubkey,
249
const char *tempdir, mandos_context *mc){
270
250
gpgme_error_t rc;
271
251
gpgme_engine_info_t engine_info;
272
252
273
253
/*
274
254
* Helper function to insert pub and seckey to the engine keyring.
275
255
*/
276
bool import_key(const char * const filename){
256
bool import_key(const char *filename){
277
257
int ret;
278
258
int fd;
279
259
gpgme_data_t pgp_data;
360
340
* Decrypt OpenPGP data.
361
341
* Returns -1 on error
362
342
*/
363
__attribute__((nonnull, warn_unused_result))
364
343
static ssize_t pgp_packet_decrypt(const char *cryptotext,
365
344
size_t crypto_size,
366
345
char **plaintext,
486
465
return plaintext_length;
487
466
}
488
467
489
__attribute__((warn_unused_result))
490
static const char *safer_gnutls_strerror(int value){
468
static const char * safer_gnutls_strerror(int value){
491
469
const char *ret = gnutls_strerror(value);
492
470
if(ret == NULL)
493
471
ret = "(unknown)";
495
473
}
496
474
497
475
/* GnuTLS log function callback */
498
__attribute__((nonnull))
499
476
static void debuggnutls(__attribute__((unused)) int level,
500
477
const char* string){
501
478
fprintf_plus(stderr, "GnuTLS: %s", string);
502
479
}
503
480
504
__attribute__((nonnull, warn_unused_result))
505
481
static int init_gnutls_global(const char *pubkeyfilename,
506
482
const char *seckeyfilename,
507
483
mandos_context *mc){
581
557
return -1;
582
558
}
583
559
584
__attribute__((nonnull, warn_unused_result))
585
560
static int init_gnutls_session(gnutls_session_t *session,
586
561
mandos_context *mc){
587
562
int ret;
644
619
__attribute__((unused)) const char *txt){}
645
620
646
621
/* Called when a Mandos server is found */
647
__attribute__((nonnull, warn_unused_result))
648
622
static int start_mandos_communication(const char *ip, in_port_t port,
649
623
AvahiIfIndex if_index,
650
624
int af, mandos_context *mc){
651
625
int ret, tcp_sd = -1;
652
626
ssize_t sret;
653
struct sockaddr_storage to;
627
union {
628
struct sockaddr_in in;
629
struct sockaddr_in6 in6;
630
} to;
654
631
char *buffer = NULL;
655
632
char *decrypted_buffer = NULL;
656
633
size_t buffer_length = 0;
680
657
return -1;
681
658
}
682
659
683
/* If the interface is specified and we have a list of interfaces */
684
if(if_index != AVAHI_IF_UNSPEC and mc->interfaces != NULL){
685
/* Check if the interface is one of the interfaces we are using */
686
bool match = false;
687
{
688
char *interface = NULL;
689
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
690
interface))){
691
if(if_nametoindex(interface) == (unsigned int)if_index){
692
match = true;
693
break;
694
}
695
}
696
}
697
if(not match){
698
/* This interface does not match any in the list, so we don't
699
connect to the server */
700
if(debug){
701
char interface[IF_NAMESIZE];
702
if(if_indextoname((unsigned int)if_index, interface) == NULL){
703
perror_plus("if_indextoname");
704
} else {
705
fprintf_plus(stderr, "Skipping server on non-used interface"
706
" \"%s\"\n",
707
if_indextoname((unsigned int)if_index,
708
interface));
709
}
710
}
711
return -1;
712
}
713
}
714
715
660
ret = init_gnutls_session(&session, mc);
716
661
if(ret != 0){
717
662
return -1;
737
682
738
683
memset(&to, 0, sizeof(to));
739
684
if(af == AF_INET6){
740
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
741
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
685
to.in6.sin6_family = (sa_family_t)af;
686
ret = inet_pton(af, ip, &to.in6.sin6_addr);
742
687
} else { /* IPv4 */
743
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
744
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
688
to.in.sin_family = (sa_family_t)af;
689
ret = inet_pton(af, ip, &to.in.sin_addr);
745
690
}
746
691
if(ret < 0 ){
747
692
int e = errno;
756
701
goto mandos_end;
757
702
}
758
703
if(af == AF_INET6){
759
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
760
if(IN6_IS_ADDR_LINKLOCAL
761
(&((struct sockaddr_in6 *)&to)->sin6_addr)){
704
to.in6.sin6_port = htons(port);
705
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
706
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
707
-Wunreachable-code*/
762
708
if(if_index == AVAHI_IF_UNSPEC){
763
709
fprintf_plus(stderr, "An IPv6 link-local address is"
764
710
" incomplete without a network interface\n");
766
712
goto mandos_end;
767
713
}
768
714
/* Set the network interface number as scope */
769
((struct sockaddr_in6 *)&to)->sin6_scope_id = (uint32_t)if_index;
715
to.in6.sin6_scope_id = (uint32_t)if_index;
770
716
}
771
717
} else {
772
((struct sockaddr_in *)&to)->sin_port = htons(port);
718
to.in.sin_port = htons(port); /* Spurious warnings from
719
-Wconversion and
720
-Wunreachable-code */
773
721
}
774
722
775
723
if(quit_now){
792
740
}
793
741
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
794
742
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
743
const char *pcret;
795
744
if(af == AF_INET6){
796
ret = getnameinfo((struct sockaddr *)&to,
797
sizeof(struct sockaddr_in6),
798
addrstr, sizeof(addrstr), NULL, 0,
799
NI_NUMERICHOST);
745
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
746
sizeof(addrstr));
800
747
} else {
801
ret = getnameinfo((struct sockaddr *)&to,
802
sizeof(struct sockaddr_in),
803
addrstr, sizeof(addrstr), NULL, 0,
804
NI_NUMERICHOST);
748
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
749
sizeof(addrstr));
805
750
}
806
if(ret == EAI_SYSTEM){
807
perror_plus("getnameinfo");
808
} else if(ret != 0) {
809
fprintf_plus(stderr, "getnameinfo: %s", gai_strerror(ret));
810
} else if(strcmp(addrstr, ip) != 0){
811
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
751
if(pcret == NULL){
752
perror_plus("inet_ntop");
753
} else {
754
if(strcmp(addrstr, ip) != 0){
755
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
756
}
812
757
}
813
758
}
814
759
818
763
}
819
764
820
765
if(af == AF_INET6){
821
ret = connect(tcp_sd, (struct sockaddr *)&to,
822
sizeof(struct sockaddr_in6));
766
ret = connect(tcp_sd, &to.in6, sizeof(to));
823
767
} else {
824
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
825
sizeof(struct sockaddr_in));
768
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
826
769
}
827
770
if(ret < 0){
828
if((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
771
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
829
772
int e = errno;
830
773
perror_plus("connect");
831
774
errno = e;
1046
989
return retval;
1047
990
}
1048
991
1049
__attribute__((nonnull))
1050
992
static void resolve_callback(AvahiSServiceResolver *r,
1051
993
AvahiIfIndex interface,
1052
994
AvahiProtocol proto,
1060
1002
AVAHI_GCC_UNUSED AvahiStringList *txt,
1061
1003
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1062
1004
flags,
1063
void *mc){
1005
void* mc){
1064
1006
if(r == NULL){
1065
1007
return;
1066
1008
}
1119
1061
const char *domain,
1120
1062
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1121
1063
flags,
1122
void *mc){
1064
void* mc){
1123
1065
if(b == NULL){
1124
1066
return;
1125
1067
}
1185
1127
errno = old_errno;
1186
1128
}
1187
1129
1188
__attribute__((nonnull, warn_unused_result))
1189
1130
bool get_flags(const char *ifname, struct ifreq *ifr){
1190
1131
int ret;
1191
1132
error_t ret_errno;
1210
1151
return true;
1211
1152
}
1212
1153
1213
__attribute__((nonnull, warn_unused_result))
1214
1154
bool good_flags(const char *ifname, const struct ifreq *ifr){
1215
1155
1216
1156
/* Reject the loopback device */
1258
1198
* corresponds to an acceptable network device.
1259
1199
* (This function is passed to scandir(3) as a filter function.)
1260
1200
*/
1261
__attribute__((nonnull, warn_unused_result))
1262
1201
int good_interface(const struct dirent *if_entry){
1263
1202
if(if_entry->d_name[0] == '.'){
1264
1203
return 0;
1282
1221
/*
1283
1222
* This function determines if a network interface is up.
1284
1223
*/
1285
__attribute__((nonnull, warn_unused_result))
1286
1224
bool interface_is_up(const char *interface){
1287
1225
struct ifreq ifr;
1288
1226
if(not get_flags(interface, &ifr)){
1299
1237
/*
1300
1238
* This function determines if a network interface is running
1301
1239
*/
1302
__attribute__((nonnull, warn_unused_result))
1303
1240
bool interface_is_running(const char *interface){
1304
1241
struct ifreq ifr;
1305
1242
if(not get_flags(interface, &ifr)){
1313
1250
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1314
1251
}
1315
1252
1316
__attribute__((nonnull, pure, warn_unused_result))
1317
1253
int notdotentries(const struct dirent *direntry){
1318
1254
/* Skip "." and ".." */
1319
1255
if(direntry->d_name[0] == '.'
1326
1262
}
1327
1263
1328
1264
/* Is this directory entry a runnable program? */
1329
__attribute__((nonnull, warn_unused_result))
1330
1265
int runnable_hook(const struct dirent *direntry){
1331
1266
int ret;
1332
1267
size_t sret;
1340
1275
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1341
1276
"abcdefghijklmnopqrstuvwxyz"
1342
1277
"0123456789"
1343
"_.-");
1278
"_-");
1344
1279
if((direntry->d_name)[sret] != '\0'){
1345
1280
/* Contains non-allowed characters */
1346
1281
if(debug){
1350
1285
return 0;
1351
1286
}
1352
1287
1353
ret = fstatat(hookdir_fd, direntry->d_name, &st, 0);
1288
char *fullname = NULL;
1289
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1290
if(ret < 0){
1291
perror_plus("asprintf");
1292
return 0;
1293
}
1294
1295
ret = stat(fullname, &st);
1354
1296
if(ret == -1){
1355
1297
if(debug){
1356
1298
perror_plus("Could not stat hook");
1380
1322
return 1;
1381
1323
}
1382
1324
1383
__attribute__((nonnull, warn_unused_result))
1384
1325
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1385
1326
mandos_context *mc){
1386
1327
int ret;
1390
1331
1391
1332
while(true){
1392
1333
if(mc->current_server == NULL){
1393
if(debug){
1334
if (debug){
1394
1335
fprintf_plus(stderr, "Wait until first server is found."
1395
1336
" No timeout!\n");
1396
1337
}
1397
1338
ret = avahi_simple_poll_iterate(s, -1);
1398
1339
} else {
1399
if(debug){
1340
if (debug){
1400
1341
fprintf_plus(stderr, "Check current_server if we should run"
1401
1342
" it, or wait\n");
1402
1343
}
1419
1360
- ((intmax_t)waited_time.tv_sec * 1000))
1420
1361
- ((intmax_t)waited_time.tv_nsec / 1000000));
1421
1362
1422
if(debug){
1363
if (debug){
1423
1364
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1424
1365
block_time);
1425
1366
}
1447
1388
ret = avahi_simple_poll_iterate(s, (int)block_time);
1448
1389
}
1449
1390
if(ret != 0){
1450
if(ret > 0 or errno != EINTR){
1391
if (ret > 0 or errno != EINTR){
1451
1392
return (ret != 1) ? ret : 0;
1452
1393
}
1453
1394
}
1455
1396
}
1456
1397
1457
1398
/* Set effective uid to 0, return errno */
1458
__attribute__((warn_unused_result))
1459
1399
error_t raise_privileges(void){
1460
1400
error_t old_errno = errno;
1461
1401
error_t ret_errno = 0;
1462
1402
if(seteuid(0) == -1){
1463
1403
ret_errno = errno;
1404
perror_plus("seteuid");
1464
1405
}
1465
1406
errno = old_errno;
1466
1407
return ret_errno;
1467
1408
}
1468
1409
1469
1410
/* Set effective and real user ID to 0. Return errno. */
1470
__attribute__((warn_unused_result))
1471
1411
error_t raise_privileges_permanently(void){
1472
1412
error_t old_errno = errno;
1473
1413
error_t ret_errno = raise_privileges();
1477
1417
}
1478
1418
if(setuid(0) == -1){
1479
1419
ret_errno = errno;
1420
perror_plus("seteuid");
1480
1421
}
1481
1422
errno = old_errno;
1482
1423
return ret_errno;
1483
1424
}
1484
1425
1485
1426
/* Set effective user ID to unprivileged saved user ID */
1486
__attribute__((warn_unused_result))
1487
1427
error_t lower_privileges(void){
1488
1428
error_t old_errno = errno;
1489
1429
error_t ret_errno = 0;
1490
1430
if(seteuid(uid) == -1){
1491
1431
ret_errno = errno;
1432
perror_plus("seteuid");
1492
1433
}
1493
1434
errno = old_errno;
1494
1435
return ret_errno;
1495
1436
}
1496
1437
1497
1438
/* Lower privileges permanently */
1498
__attribute__((warn_unused_result))
1499
1439
error_t lower_privileges_permanently(void){
1500
1440
error_t old_errno = errno;
1501
1441
error_t ret_errno = 0;
1502
1442
if(setuid(uid) == -1){
1503
1443
ret_errno = errno;
1444
perror_plus("setuid");
1504
1445
}
1505
1446
errno = old_errno;
1506
1447
return ret_errno;
1507
1448
}
1508
1449
1509
__attribute__((nonnull))
1510
void run_network_hooks(const char *mode, const char *interface,
1450
bool run_network_hooks(const char *mode, const char *interface,
1511
1451
const float delay){
1512
struct dirent **direntries = NULL;
1513
if(hookdir_fd == -1){
1514
hookdir_fd = open(hookdir, O_RDONLY);
1515
if(hookdir_fd == -1){
1516
if(errno == ENOENT){
1517
if(debug){
1518
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1519
" found\n", hookdir);
1520
}
1521
} else {
1522
perror_plus("open");
1523
}
1524
return;
1525
}
1526
}
1527
#ifdef __GLIBC__
1528
#if __GLIBC_PREREQ(2, 15)
1529
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1530
runnable_hook, alphasort);
1531
#else /* not __GLIBC_PREREQ(2, 15) */
1532
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1533
alphasort);
1534
#endif /* not __GLIBC_PREREQ(2, 15) */
1535
#else /* not __GLIBC__ */
1536
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1537
alphasort);
1538
#endif /* not __GLIBC__ */
1452
struct dirent **direntries;
1453
struct dirent *direntry;
1454
int ret;
1455
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1456
alphasort);
1539
1457
if(numhooks == -1){
1540
perror_plus("scandir");
1541
return;
1542
}
1543
struct dirent *direntry;
1544
int ret;
1545
int devnull = open("/dev/null", O_RDONLY);
1546
for(int i = 0; i < numhooks; i++){
1547
direntry = direntries[i];
1548
if(debug){
1549
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1550
direntry->d_name);
1458
if(errno == ENOENT){
1459
if(debug){
1460
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1461
" found\n", hookdir);
1462
}
1463
} else {
1464
perror_plus("scandir");
1551
1465
}
1552
pid_t hook_pid = fork();
1553
if(hook_pid == 0){
1554
/* Child */
1555
/* Raise privileges */
1556
errno = raise_privileges_permanently();
1557
if(errno != 0){
1558
perror_plus("Failed to raise privileges");
1559
_exit(EX_NOPERM);
1560
}
1561
/* Set group */
1562
errno = 0;
1563
ret = setgid(0);
1564
if(ret == -1){
1565
perror_plus("setgid");
1566
_exit(EX_NOPERM);
1567
}
1568
/* Reset supplementary groups */
1569
errno = 0;
1570
ret = setgroups(0, NULL);
1571
if(ret == -1){
1572
perror_plus("setgroups");
1573
_exit(EX_NOPERM);
1574
}
1575
ret = dup2(devnull, STDIN_FILENO);
1576
if(ret == -1){
1577
perror_plus("dup2(devnull, STDIN_FILENO)");
1578
_exit(EX_OSERR);
1579
}
1580
ret = close(devnull);
1581
if(ret == -1){
1582
perror_plus("close");
1583
_exit(EX_OSERR);
1584
}
1585
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1586
if(ret == -1){
1587
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1588
_exit(EX_OSERR);
1589
}
1590
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1591
if(ret == -1){
1592
perror_plus("setenv");
1593
_exit(EX_OSERR);
1594
}
1595
ret = setenv("DEVICE", interface, 1);
1596
if(ret == -1){
1597
perror_plus("setenv");
1598
_exit(EX_OSERR);
1599
}
1600
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1601
if(ret == -1){
1602
perror_plus("setenv");
1603
_exit(EX_OSERR);
1604
}
1605
ret = setenv("MODE", mode, 1);
1606
if(ret == -1){
1607
perror_plus("setenv");
1608
_exit(EX_OSERR);
1609
}
1610
char *delaystring;
1611
ret = asprintf(&delaystring, "%f", (double)delay);
1612
if(ret == -1){
1466
} else {
1467
int devnull = open("/dev/null", O_RDONLY);
1468
for(int i = 0; i < numhooks; i++){
1469
direntry = direntries[i];
1470
char *fullname = NULL;
1471
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1472
if(ret < 0){
1613
1473
perror_plus("asprintf");
1614
_exit(EX_OSERR);
1615
}
1616
ret = setenv("DELAY", delaystring, 1);
1617
if(ret == -1){
1474
continue;
1475
}
1476
if(debug){
1477
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1478
direntry->d_name);
1479
}
1480
pid_t hook_pid = fork();
1481
if(hook_pid == 0){
1482
/* Child */
1483
/* Raise privileges */
1484
raise_privileges_permanently();
1485
/* Set group */
1486
errno = 0;
1487
ret = setgid(0);
1488
if(ret == -1){
1489
perror_plus("setgid");
1490
}
1491
/* Reset supplementary groups */
1492
errno = 0;
1493
ret = setgroups(0, NULL);
1494
if(ret == -1){
1495
perror_plus("setgroups");
1496
}
1497
dup2(devnull, STDIN_FILENO);
1498
close(devnull);
1499
dup2(STDERR_FILENO, STDOUT_FILENO);
1500
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1501
if(ret == -1){
1502
perror_plus("setenv");
1503
_exit(EX_OSERR);
1504
}
1505
ret = setenv("DEVICE", interface, 1);
1506
if(ret == -1){
1507
perror_plus("setenv");
1508
_exit(EX_OSERR);
1509
}
1510
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1511
if(ret == -1){
1512
perror_plus("setenv");
1513
_exit(EX_OSERR);
1514
}
1515
ret = setenv("MODE", mode, 1);
1516
if(ret == -1){
1517
perror_plus("setenv");
1518
_exit(EX_OSERR);
1519
}
1520
char *delaystring;
1521
ret = asprintf(&delaystring, "%f", delay);
1522
if(ret == -1){
1523
perror_plus("asprintf");
1524
_exit(EX_OSERR);
1525
}
1526
ret = setenv("DELAY", delaystring, 1);
1527
if(ret == -1){
1528
free(delaystring);
1529
perror_plus("setenv");
1530
_exit(EX_OSERR);
1531
}
1618
1532
free(delaystring);
1619
perror_plus("setenv");
1620
_exit(EX_OSERR);
1621
}
1622
free(delaystring);
1623
if(connect_to != NULL){
1624
ret = setenv("CONNECT", connect_to, 1);
1625
if(ret == -1){
1626
perror_plus("setenv");
1627
_exit(EX_OSERR);
1628
}
1629
}
1630
int hook_fd = openat(hookdir_fd, direntry->d_name, O_RDONLY);
1631
if(hook_fd == -1){
1632
perror_plus("openat");
1633
_exit(EXIT_FAILURE);
1634
}
1635
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1636
perror_plus("close");
1637
_exit(EXIT_FAILURE);
1638
}
1639
if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },
1640
environ) == -1){
1641
perror_plus("fexecve");
1642
_exit(EXIT_FAILURE);
1643
}
1644
} else {
1645
int status;
1646
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1647
perror_plus("waitpid");
1648
continue;
1649
}
1650
if(WIFEXITED(status)){
1651
if(WEXITSTATUS(status) != 0){
1652
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1653
" with status %d\n", direntry->d_name,
1654
WEXITSTATUS(status));
1655
continue;
1656
}
1657
} else if(WIFSIGNALED(status)){
1658
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1659
" signal %d\n", direntry->d_name,
1660
WTERMSIG(status));
1661
continue;
1533
if(connect_to != NULL){
1534
ret = setenv("CONNECT", connect_to, 1);
1535
if(ret == -1){
1536
perror_plus("setenv");
1537
_exit(EX_OSERR);
1538
}
1539
}
1540
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1541
perror_plus("execl");
1542
_exit(EXIT_FAILURE);
1543
}
1662
1544
} else {
1663
fprintf_plus(stderr, "Warning: network hook \"%s\""
1664
" crashed\n", direntry->d_name);
1665
continue;
1666
}
1667
}
1668
if(debug){
1669
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1670
direntry->d_name);
1671
}
1672
}
1673
free(direntries);
1674
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1675
perror_plus("close");
1676
} else {
1677
hookdir_fd = -1;
1678
}
1679
close(devnull);
1545
int status;
1546
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1547
perror_plus("waitpid");
1548
free(fullname);
1549
continue;
1550
}
1551
if(WIFEXITED(status)){
1552
if(WEXITSTATUS(status) != 0){
1553
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1554
" with status %d\n", direntry->d_name,
1555
WEXITSTATUS(status));
1556
free(fullname);
1557
continue;
1558
}
1559
} else if(WIFSIGNALED(status)){
1560
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1561
" signal %d\n", direntry->d_name,
1562
WTERMSIG(status));
1563
free(fullname);
1564
continue;
1565
} else {
1566
fprintf_plus(stderr, "Warning: network hook \"%s\""
1567
" crashed\n", direntry->d_name);
1568
free(fullname);
1569
continue;
1570
}
1571
}
1572
free(fullname);
1573
if(debug){
1574
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1575
direntry->d_name);
1576
}
1577
}
1578
close(devnull);
1579
}
1580
return true;
1680
1581
}
1681
1582
1682
__attribute__((nonnull, warn_unused_result))
1683
1583
error_t bring_up_interface(const char *const interface,
1684
1584
const float delay){
1585
int sd = -1;
1685
1586
error_t old_errno = errno;
1686
int ret;
1587
error_t ret_errno = 0;
1588
int ret, ret_setflags;
1687
1589
struct ifreq network;
1688
1590
unsigned int if_index = if_nametoindex(interface);
1689
1591
if(if_index == 0){
1698
1600
}
1699
1601
1700
1602
if(not interface_is_up(interface)){
1701
error_t ret_errno = 0, ioctl_errno = 0;
1702
if(not get_flags(interface, &network)){
1603
if(not get_flags(interface, &network) and debug){
1703
1604
ret_errno = errno;
1704
1605
fprintf_plus(stderr, "Failed to get flags for interface "
1705
1606
"\"%s\"\n", interface);
1706
errno = old_errno;
1707
1607
return ret_errno;
1708
1608
}
1709
network.ifr_flags |= IFF_UP; /* set flag */
1609
network.ifr_flags |= IFF_UP;
1710
1610
1711
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1712
if(sd == -1){
1611
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1612
if(sd < 0){
1713
1613
ret_errno = errno;
1714
1614
perror_plus("socket");
1715
1615
errno = old_errno;
1716
1616
return ret_errno;
1717
1617
}
1718
1618
1719
1619
if(quit_now){
1720
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1721
if(ret == -1){
1722
perror_plus("close");
1723
}
1620
close(sd);
1724
1621
errno = old_errno;
1725
1622
return EINTR;
1726
1623
}
1730
1627
interface);
1731
1628
}
1732
1629
1733
/* Raise privileges */
1734
ret_errno = raise_privileges();
1735
if(ret_errno != 0){
1736
errno = ret_errno;
1737
perror_plus("Failed to raise privileges");
1738
}
1630
/* Raise priviliges */
1631
raise_privileges();
1739
1632
1740
1633
#ifdef __linux__
1741
int ret_linux;
1742
bool restore_loglevel = false;
1743
if(ret_errno == 0){
1744
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1745
messages about the network interface to mess up the prompt */
1746
ret_linux = klogctl(8, NULL, 5);
1747
if(ret_linux == -1){
1748
perror_plus("klogctl");
1749
} else {
1750
restore_loglevel = true;
1751
}
1634
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1635
messages about the network interface to mess up the prompt */
1636
int ret_linux = klogctl(8, NULL, 5);
1637
bool restore_loglevel = true;
1638
if(ret_linux == -1){
1639
restore_loglevel = false;
1640
perror_plus("klogctl");
1752
1641
}
1753
1642
#endif /* __linux__ */
1754
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1755
ioctl_errno = errno;
1643
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1644
ret_errno = errno;
1756
1645
#ifdef __linux__
1757
1646
if(restore_loglevel){
1758
1647
ret_linux = klogctl(7, NULL, 0);
1762
1651
}
1763
1652
#endif /* __linux__ */
1764
1653
1765
/* If raise_privileges() succeeded above */
1766
if(ret_errno == 0){
1767
/* Lower privileges */
1768
ret_errno = lower_privileges();
1769
if(ret_errno != 0){
1770
errno = ret_errno;
1771
perror_plus("Failed to lower privileges");
1772
}
1773
}
1654
/* Lower privileges */
1655
lower_privileges();
1774
1656
1775
1657
/* Close the socket */
1776
1658
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1779
1661
}
1780
1662
1781
1663
if(ret_setflags == -1){
1782
errno = ioctl_errno;
1664
errno = ret_errno;
1783
1665
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1784
1666
errno = old_errno;
1785
return ioctl_errno;
1667
return ret_errno;
1786
1668
}
1787
1669
} else if(debug){
1788
1670
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1806
1688
return 0;
1807
1689
}
1808
1690
1809
__attribute__((nonnull, warn_unused_result))
1810
1691
error_t take_down_interface(const char *const interface){
1692
int sd = -1;
1811
1693
error_t old_errno = errno;
1694
error_t ret_errno = 0;
1695
int ret, ret_setflags;
1812
1696
struct ifreq network;
1813
1697
unsigned int if_index = if_nametoindex(interface);
1814
1698
if(if_index == 0){
1817
1701
return ENXIO;
1818
1702
}
1819
1703
if(interface_is_up(interface)){
1820
error_t ret_errno = 0, ioctl_errno = 0;
1821
1704
if(not get_flags(interface, &network) and debug){
1822
1705
ret_errno = errno;
1823
1706
fprintf_plus(stderr, "Failed to get flags for interface "
1824
1707
"\"%s\"\n", interface);
1825
errno = old_errno;
1826
1708
return ret_errno;
1827
1709
}
1828
1710
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1829
1711
1830
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1831
if(sd == -1){
1712
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1713
if(sd < 0){
1832
1714
ret_errno = errno;
1833
1715
perror_plus("socket");
1834
1716
errno = old_errno;
1840
1722
interface);
1841
1723
}
1842
1724
1843
/* Raise privileges */
1844
ret_errno = raise_privileges();
1845
if(ret_errno != 0){
1846
errno = ret_errno;
1847
perror_plus("Failed to raise privileges");
1848
}
1849
1850
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1851
ioctl_errno = errno;
1852
1853
/* If raise_privileges() succeeded above */
1854
if(ret_errno == 0){
1855
/* Lower privileges */
1856
ret_errno = lower_privileges();
1857
if(ret_errno != 0){
1858
errno = ret_errno;
1859
perror_plus("Failed to lower privileges");
1860
}
1861
}
1725
/* Raise priviliges */
1726
raise_privileges();
1727
1728
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1729
ret_errno = errno;
1730
1731
/* Lower privileges */
1732
lower_privileges();
1862
1733
1863
1734
/* Close the socket */
1864
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
1735
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1865
1736
if(ret == -1){
1866
1737
perror_plus("close");
1867
1738
}
1868
1739
1869
1740
if(ret_setflags == -1){
1870
errno = ioctl_errno;
1741
errno = ret_errno;
1871
1742
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1872
1743
errno = old_errno;
1873
return ioctl_errno;
1744
return ret_errno;
1874
1745
}
1875
1746
} else if(debug){
1876
1747
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1884
1755
int main(int argc, char *argv[]){
1885
1756
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1886
1757
.priority = "SECURE256:!CTYPE-X.509:"
1887
"+CTYPE-OPENPGP", .current_server = NULL,
1888
.interfaces = NULL, .interfaces_size = 0 };
1758
"+CTYPE-OPENPGP", .current_server = NULL };
1889
1759
AvahiSServiceBrowser *sb = NULL;
1890
1760
error_t ret_errno;
1891
1761
int ret;
1892
1762
intmax_t tmpmax;
1893
1763
char *tmp;
1894
1764
int exitcode = EXIT_SUCCESS;
1765
char *interfaces = NULL;
1766
size_t interfaces_size = 0;
1895
1767
char *interfaces_to_take_down = NULL;
1896
1768
size_t interfaces_to_take_down_size = 0;
1897
char run_tempdir[] = "/run/tmp/mandosXXXXXX";
1898
char old_tempdir[] = "/tmp/mandosXXXXXX";
1899
char *tempdir = NULL;
1769
char tempdir[] = "/tmp/mandosXXXXXX";
1770
bool tempdir_created = false;
1900
1771
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1901
1772
const char *seckey = PATHDIR "/" SECKEY;
1902
1773
const char *pubkey = PATHDIR "/" PUBKEY;
1903
1774
char *interfaces_hooks = NULL;
1775
size_t interfaces_hooks_size = 0;
1904
1776
1905
1777
bool gnutls_initialized = false;
1906
1778
bool gpgme_initialized = false;
1997
1869
connect_to = arg;
1998
1870
break;
1999
1871
case 'i': /* --interface */
2000
ret_errno = argz_add_sep(&mc.interfaces, &mc.interfaces_size,
2001
arg, (int)',');
1872
ret_errno = argz_add_sep(&interfaces, &interfaces_size, arg,
1873
(int)',');
2002
1874
if(ret_errno != 0){
2003
1875
argp_error(state, "%s", strerror(ret_errno));
2004
1876
}
2084
1956
/* Work around Debian bug #633582:
2085
1957
<http://bugs.debian.org/633582> */
2086
1958
2087
/* Re-raise privileges */
2088
ret_errno = raise_privileges();
2089
if(ret_errno != 0){
2090
errno = ret_errno;
2091
perror_plus("Failed to raise privileges");
2092
} else {
1959
/* Re-raise priviliges */
1960
if(raise_privileges() == 0){
2093
1961
struct stat st;
2094
1962
2095
1963
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2135
2003
}
2136
2004
2137
2005
/* Lower privileges */
2138
ret_errno = lower_privileges();
2139
if(ret_errno != 0){
2140
errno = ret_errno;
2141
perror_plus("Failed to lower privileges");
2006
errno = 0;
2007
ret = seteuid(uid);
2008
if(ret == -1){
2009
perror_plus("seteuid");
2142
2010
}
2143
2011
}
2144
2012
}
2145
2013
2146
/* Remove invalid interface names (except "none") */
2014
/* Remove empty interface names */
2147
2015
{
2148
2016
char *interface = NULL;
2149
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2017
while((interface = argz_next(interfaces, interfaces_size,
2150
2018
interface))){
2151
if(strcmp(interface, "none") != 0
2152
and if_nametoindex(interface) == 0){
2153
if(interface[0] != '\0'){
2019
if(if_nametoindex(interface) == 0){
2020
if(interface[0] != '\0' and strcmp(interface, "none") != 0){
2154
2021
fprintf_plus(stderr, "Not using nonexisting interface"
2155
2022
" \"%s\"\n", interface);
2156
2023
}
2157
argz_delete(&mc.interfaces, &mc.interfaces_size, interface);
2024
argz_delete(&interfaces, &interfaces_size, interface);
2158
2025
interface = NULL;
2159
2026
}
2160
2027
}
2162
2029
2163
2030
/* Run network hooks */
2164
2031
{
2165
if(mc.interfaces != NULL){
2166
interfaces_hooks = malloc(mc.interfaces_size);
2032
2033
if(interfaces != NULL){
2034
interfaces_hooks = malloc(interfaces_size);
2167
2035
if(interfaces_hooks == NULL){
2168
2036
perror_plus("malloc");
2169
2037
goto end;
2170
2038
}
2171
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2172
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2173
}
2174
run_network_hooks("start", interfaces_hooks != NULL ?
2175
interfaces_hooks : "", delay);
2039
memcpy(interfaces_hooks, interfaces, interfaces_size);
2040
interfaces_hooks_size = interfaces_size;
2041
argz_stringify(interfaces_hooks, interfaces_hooks_size,
2042
(int)',');
2043
}
2044
if(not run_network_hooks("start", interfaces_hooks != NULL ?
2045
interfaces_hooks : "", delay)){
2046
goto end;
2047
}
2176
2048
}
2177
2049
2178
2050
if(not debug){
2255
2127
}
2256
2128
2257
2129
/* If no interfaces were specified, make a list */
2258
if(mc.interfaces == NULL){
2259
struct dirent **direntries = NULL;
2130
if(interfaces == NULL){
2131
struct dirent **direntries;
2260
2132
/* Look for any good interfaces */
2261
2133
ret = scandir(sys_class_net, &direntries, good_interface,
2262
2134
alphasort);
2263
2135
if(ret >= 1){
2264
2136
/* Add all found interfaces to interfaces list */
2265
2137
for(int i = 0; i < ret; ++i){
2266
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2138
ret_errno = argz_add(&interfaces, &interfaces_size,
2267
2139
direntries[i]->d_name);
2268
2140
if(ret_errno != 0){
2269
errno = ret_errno;
2270
2141
perror_plus("argz_add");
2271
2142
continue;
2272
2143
}
2277
2148
}
2278
2149
free(direntries);
2279
2150
} else {
2280
if(ret == 0){
2281
free(direntries);
2282
}
2151
free(direntries);
2283
2152
fprintf_plus(stderr, "Could not find a network interface\n");
2284
2153
exitcode = EXIT_FAILURE;
2285
2154
goto end;
2286
2155
}
2287
2156
}
2288
2157
2289
/* Bring up interfaces which are down, and remove any "none"s */
2290
{
2158
/* If we only got one interface, explicitly use only that one */
2159
if(argz_count(interfaces, interfaces_size) == 1){
2160
if(debug){
2161
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2162
interfaces);
2163
}
2164
if_index = (AvahiIfIndex)if_nametoindex(interfaces);
2165
}
2166
2167
/* Bring up interfaces which are down */
2168
if(not (argz_count(interfaces, interfaces_size) == 1
2169
and strcmp(interfaces, "none") == 0)){
2291
2170
char *interface = NULL;
2292
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2171
while((interface = argz_next(interfaces, interfaces_size,
2293
2172
interface))){
2294
/* If interface name is "none", stop bringing up interfaces.
2295
Also remove all instances of "none" from the list */
2296
if(strcmp(interface, "none") == 0){
2297
argz_delete(&mc.interfaces, &mc.interfaces_size,
2298
interface);
2299
interface = NULL;
2300
while((interface = argz_next(mc.interfaces,
2301
mc.interfaces_size, interface))){
2302
if(strcmp(interface, "none") == 0){
2303
argz_delete(&mc.interfaces, &mc.interfaces_size,
2304
interface);
2305
interface = NULL;
2306
}
2307
}
2308
break;
2309
}
2310
2173
bool interface_was_up = interface_is_up(interface);
2311
errno = bring_up_interface(interface, delay);
2174
ret = bring_up_interface(interface, delay);
2312
2175
if(not interface_was_up){
2313
if(errno != 0){
2176
if(ret != 0){
2177
errno = ret;
2314
2178
perror_plus("Failed to bring up interface");
2315
2179
} else {
2316
errno = argz_add(&interfaces_to_take_down,
2317
&interfaces_to_take_down_size,
2318
interface);
2319
if(errno != 0){
2320
perror_plus("argz_add");
2321
}
2180
ret_errno = argz_add(&interfaces_to_take_down,
2181
&interfaces_to_take_down_size,
2182
interface);
2322
2183
}
2323
2184
}
2324
2185
}
2186
free(interfaces);
2187
interfaces = NULL;
2188
interfaces_size = 0;
2325
2189
if(debug and (interfaces_to_take_down == NULL)){
2326
2190
fprintf_plus(stderr, "No interfaces were brought up\n");
2327
2191
}
2328
2192
}
2329
2193
2330
/* If we only got one interface, explicitly use only that one */
2331
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
2332
if(debug){
2333
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2334
mc.interfaces);
2335
}
2336
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
2337
}
2338
2339
2194
if(quit_now){
2340
2195
goto end;
2341
2196
}
2353
2208
goto end;
2354
2209
}
2355
2210
2356
/* Try /run/tmp before /tmp */
2357
tempdir = mkdtemp(run_tempdir);
2358
if(tempdir == NULL and errno == ENOENT){
2359
if(debug){
2360
fprintf_plus(stderr, "Tempdir %s did not work, trying %s\n",
2361
run_tempdir, old_tempdir);
2362
}
2363
tempdir = mkdtemp(old_tempdir);
2364
}
2365
if(tempdir == NULL){
2211
if(mkdtemp(tempdir) == NULL){
2366
2212
perror_plus("mkdtemp");
2367
2213
goto end;
2368
2214
}
2215
tempdir_created = true;
2369
2216
2370
2217
if(quit_now){
2371
2218
goto end;
2407
2254
exitcode = EX_USAGE;
2408
2255
goto end;
2409
2256
}
2410
2257
2411
2258
if(quit_now){
2412
2259
goto end;
2413
2260
}
2443
2290
fprintf_plus(stderr, "Retrying in %d seconds\n",
2444
2291
(int)retry_interval);
2445
2292
}
2446
sleep((unsigned int)retry_interval);
2293
sleep((int)retry_interval);
2447
2294
}
2448
2295
2449
if(not quit_now){
2296
if (not quit_now){
2450
2297
exitcode = EXIT_SUCCESS;
2451
2298
}
2452
2299
2507
2354
if(debug){
2508
2355
fprintf_plus(stderr, "Starting Avahi loop search\n");
2509
2356
}
2510
2357
2511
2358
ret = avahi_loop_with_timeout(simple_poll,
2512
2359
(int)(retry_interval * 1000), &mc);
2513
2360
if(debug){
2522
2369
}
2523
2370
2524
2371
/* Cleanup things */
2525
free(mc.interfaces);
2526
2527
2372
if(sb != NULL)
2528
2373
avahi_s_service_browser_free(sb);
2529
2374
2554
2399
}
2555
2400
}
2556
2401
2557
/* Re-raise privileges */
2402
/* Re-raise priviliges */
2558
2403
{
2559
ret_errno = raise_privileges();
2560
if(ret_errno != 0){
2561
errno = ret_errno;
2562
perror_plus("Failed to raise privileges");
2563
} else {
2564
2565
/* Run network hooks */
2566
run_network_hooks("stop", interfaces_hooks != NULL ?
2567
interfaces_hooks : "", delay);
2568
2569
/* Take down the network interfaces which were brought up */
2570
{
2571
char *interface = NULL;
2572
while((interface=argz_next(interfaces_to_take_down,
2573
interfaces_to_take_down_size,
2574
interface))){
2575
ret_errno = take_down_interface(interface);
2576
if(ret_errno != 0){
2577
errno = ret_errno;
2578
perror_plus("Failed to take down interface");
2579
}
2580
}
2581
if(debug and (interfaces_to_take_down == NULL)){
2582
fprintf_plus(stderr, "No interfaces needed to be taken"
2583
" down\n");
2584
}
2585
}
2586
}
2587
2588
ret_errno = lower_privileges_permanently();
2589
if(ret_errno != 0){
2590
errno = ret_errno;
2591
perror_plus("Failed to lower privileges permanently");
2592
}
2404
raise_privileges();
2405
2406
/* Run network hooks */
2407
run_network_hooks("stop", interfaces_hooks != NULL ?
2408
interfaces_hooks : "", delay);
2409
2410
/* Take down the network interfaces which were brought up */
2411
{
2412
char *interface = NULL;
2413
while((interface=argz_next(interfaces_to_take_down,
2414
interfaces_to_take_down_size,
2415
interface))){
2416
ret_errno = take_down_interface(interface);
2417
if(ret_errno != 0){
2418
errno = ret_errno;
2419
perror_plus("Failed to take down interface");
2420
}
2421
}
2422
if(debug and (interfaces_to_take_down == NULL)){
2423
fprintf_plus(stderr, "No interfaces needed to be taken"
2424
" down\n");
2425
}
2426
}
2427
2428
lower_privileges_permanently();
2593
2429
}
2594
2430
2595
2431
free(interfaces_to_take_down);
2596
2432
free(interfaces_hooks);
2597
2433
2598
2434
/* Removes the GPGME temp directory and all files inside */
2599
if(tempdir != NULL){
2435
if(tempdir_created){
2600
2436
struct dirent **direntries = NULL;
2601
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY |
2602
O_NOFOLLOW));
2603
if(tempdir_fd == -1){
2604
perror_plus("open");
2605
} else {
2606
#ifdef __GLIBC__
2607
#if __GLIBC_PREREQ(2, 15)
2608
int numentries = scandirat(tempdir_fd, ".", &direntries,
2609
notdotentries, alphasort);
2610
#else /* not __GLIBC_PREREQ(2, 15) */
2611
int numentries = scandir(tempdir, &direntries, notdotentries,
2612
alphasort);
2613
#endif /* not __GLIBC_PREREQ(2, 15) */
2614
#else /* not __GLIBC__ */
2615
int numentries = scandir(tempdir, &direntries, notdotentries,
2616
alphasort);
2617
#endif /* not __GLIBC__ */
2618
if(numentries >= 0){
2619
for(int i = 0; i < numentries; i++){
2620
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
2621
if(ret == -1){
2622
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
2623
" \"%s\", 0): %s\n", tempdir,
2624
direntries[i]->d_name, strerror(errno));
2625
}
2626
}
2627
2628
/* need to clean even if 0 because man page doesn't specify */
2629
free(direntries);
2630
if(numentries == -1){
2631
perror_plus("scandir");
2632
}
2633
ret = rmdir(tempdir);
2634
if(ret == -1 and errno != ENOENT){
2635
perror_plus("rmdir");
2636
}
2437
struct dirent *direntry = NULL;
2438
int numentries = scandir(tempdir, &direntries, notdotentries,
2439
alphasort);
2440
if (numentries > 0){
2441
for(int i = 0; i < numentries; i++){
2442
direntry = direntries[i];
2443
char *fullname = NULL;
2444
ret = asprintf(&fullname, "%s/%s", tempdir,
2445
direntry->d_name);
2446
if(ret < 0){
2447
perror_plus("asprintf");
2448
continue;
2449
}
2450
ret = remove(fullname);
2451
if(ret == -1){
2452
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2453
strerror(errno));
2454
}
2455
free(fullname);
2637
2456
}
2638
TEMP_FAILURE_RETRY(close(tempdir_fd));
2457
}
2458
2459
/* need to clean even if 0 because man page doesn't specify */
2460
free(direntries);
2461
if (numentries == -1){
2462
perror_plus("scandir");
2463
}
2464
ret = rmdir(tempdir);
2465
if(ret == -1 and errno != ENOENT){
2466
perror_plus("rmdir");
2639
2467
}
2640
2468
}
2641
2469
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0