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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
#ifdef __GNUC__
244
#pragma GCC diagnostic push
245
#pragma GCC diagnostic ignored "-Wcast-qual"
246
#endif
247
free((char *)(new_server->ip));
248
#ifdef __GNUC__
249
#pragma GCC diagnostic pop
250
#endif
251
free(new_server);
252
223
return false;
253
224
}
254
225
/* Special case of first server */
256
227
new_server->next = new_server;
257
228
new_server->prev = new_server;
258
229
*current_server = new_server;
230
/* Place the new server last in the list */
259
231
} else {
260
/* Place the new server last in the list */
261
232
new_server->next = *current_server;
262
233
new_server->prev = (*current_server)->prev;
263
234
new_server->prev->next = new_server;
264
235
(*current_server)->prev = new_server;
265
236
}
237
ret = clock_gettime(CLOCK_MONOTONIC, &(*current_server)->last_seen);
238
if(ret == -1){
239
perror_plus("clock_gettime");
240
return false;
241
}
266
242
return true;
267
243
}
268
244
269
245
/*
270
246
* Initialize GPGME.
271
247
*/
272
__attribute__((nonnull, warn_unused_result))
273
static bool init_gpgme(const char * const seckey,
274
const char * const pubkey,
275
const char * const tempdir,
276
mandos_context *mc){
248
static bool init_gpgme(const char *seckey, const char *pubkey,
249
const char *tempdir, mandos_context *mc){
277
250
gpgme_error_t rc;
278
251
gpgme_engine_info_t engine_info;
279
252
280
253
/*
281
254
* Helper function to insert pub and seckey to the engine keyring.
282
255
*/
283
bool import_key(const char * const filename){
256
bool import_key(const char *filename){
284
257
int ret;
285
258
int fd;
286
259
gpgme_data_t pgp_data;
367
340
* Decrypt OpenPGP data.
368
341
* Returns -1 on error
369
342
*/
370
__attribute__((nonnull, warn_unused_result))
371
343
static ssize_t pgp_packet_decrypt(const char *cryptotext,
372
344
size_t crypto_size,
373
345
char **plaintext,
493
465
return plaintext_length;
494
466
}
495
467
496
__attribute__((warn_unused_result))
497
static const char *safer_gnutls_strerror(int value){
468
static const char * safer_gnutls_strerror(int value){
498
469
const char *ret = gnutls_strerror(value);
499
470
if(ret == NULL)
500
471
ret = "(unknown)";
502
473
}
503
474
504
475
/* GnuTLS log function callback */
505
__attribute__((nonnull))
506
476
static void debuggnutls(__attribute__((unused)) int level,
507
477
const char* string){
508
478
fprintf_plus(stderr, "GnuTLS: %s", string);
509
479
}
510
480
511
__attribute__((nonnull, warn_unused_result))
512
481
static int init_gnutls_global(const char *pubkeyfilename,
513
482
const char *seckeyfilename,
514
483
mandos_context *mc){
588
557
return -1;
589
558
}
590
559
591
__attribute__((nonnull, warn_unused_result))
592
560
static int init_gnutls_session(gnutls_session_t *session,
593
561
mandos_context *mc){
594
562
int ret;
651
619
__attribute__((unused)) const char *txt){}
652
620
653
621
/* Called when a Mandos server is found */
654
__attribute__((nonnull, warn_unused_result))
655
622
static int start_mandos_communication(const char *ip, in_port_t port,
656
623
AvahiIfIndex if_index,
657
624
int af, mandos_context *mc){
658
625
int ret, tcp_sd = -1;
659
626
ssize_t sret;
660
struct sockaddr_storage to;
627
union {
628
struct sockaddr_in in;
629
struct sockaddr_in6 in6;
630
} to;
661
631
char *buffer = NULL;
662
632
char *decrypted_buffer = NULL;
663
633
size_t buffer_length = 0;
687
657
return -1;
688
658
}
689
659
690
/* If the interface is specified and we have a list of interfaces */
691
if(if_index != AVAHI_IF_UNSPEC and mc->interfaces != NULL){
692
/* Check if the interface is one of the interfaces we are using */
693
bool match = false;
694
{
695
char *interface = NULL;
696
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
697
interface))){
698
if(if_nametoindex(interface) == (unsigned int)if_index){
699
match = true;
700
break;
701
}
702
}
703
}
704
if(not match){
705
/* This interface does not match any in the list, so we don't
706
connect to the server */
707
if(debug){
708
char interface[IF_NAMESIZE];
709
if(if_indextoname((unsigned int)if_index, interface) == NULL){
710
perror_plus("if_indextoname");
711
} else {
712
fprintf_plus(stderr, "Skipping server on non-used interface"
713
" \"%s\"\n",
714
if_indextoname((unsigned int)if_index,
715
interface));
716
}
717
}
718
return -1;
719
}
720
}
721
722
660
ret = init_gnutls_session(&session, mc);
723
661
if(ret != 0){
724
662
return -1;
744
682
745
683
memset(&to, 0, sizeof(to));
746
684
if(af == AF_INET6){
747
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
748
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);
749
687
} else { /* IPv4 */
750
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
751
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);
752
690
}
753
691
if(ret < 0 ){
754
692
int e = errno;
763
701
goto mandos_end;
764
702
}
765
703
if(af == AF_INET6){
766
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
767
if(IN6_IS_ADDR_LINKLOCAL
768
(&((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*/
769
708
if(if_index == AVAHI_IF_UNSPEC){
770
709
fprintf_plus(stderr, "An IPv6 link-local address is"
771
710
" incomplete without a network interface\n");
773
712
goto mandos_end;
774
713
}
775
714
/* Set the network interface number as scope */
776
((struct sockaddr_in6 *)&to)->sin6_scope_id = (uint32_t)if_index;
715
to.in6.sin6_scope_id = (uint32_t)if_index;
777
716
}
778
717
} else {
779
((struct sockaddr_in *)&to)->sin_port = htons(port);
718
to.in.sin_port = htons(port); /* Spurious warnings from
719
-Wconversion and
720
-Wunreachable-code */
780
721
}
781
722
782
723
if(quit_now){
799
740
}
800
741
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
801
742
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
743
const char *pcret;
802
744
if(af == AF_INET6){
803
ret = getnameinfo((struct sockaddr *)&to,
804
sizeof(struct sockaddr_in6),
805
addrstr, sizeof(addrstr), NULL, 0,
806
NI_NUMERICHOST);
745
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
746
sizeof(addrstr));
807
747
} else {
808
ret = getnameinfo((struct sockaddr *)&to,
809
sizeof(struct sockaddr_in),
810
addrstr, sizeof(addrstr), NULL, 0,
811
NI_NUMERICHOST);
748
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
749
sizeof(addrstr));
812
750
}
813
if(ret == EAI_SYSTEM){
814
perror_plus("getnameinfo");
815
} else if(ret != 0) {
816
fprintf_plus(stderr, "getnameinfo: %s", gai_strerror(ret));
817
} else if(strcmp(addrstr, ip) != 0){
818
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
}
819
757
}
820
758
}
821
759
825
763
}
826
764
827
765
if(af == AF_INET6){
828
ret = connect(tcp_sd, (struct sockaddr *)&to,
829
sizeof(struct sockaddr_in6));
766
ret = connect(tcp_sd, &to.in6, sizeof(to));
830
767
} else {
831
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
832
sizeof(struct sockaddr_in));
768
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
833
769
}
834
770
if(ret < 0){
835
if((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
771
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
836
772
int e = errno;
837
773
perror_plus("connect");
838
774
errno = e;
1053
989
return retval;
1054
990
}
1055
991
1056
__attribute__((nonnull))
1057
992
static void resolve_callback(AvahiSServiceResolver *r,
1058
993
AvahiIfIndex interface,
1059
994
AvahiProtocol proto,
1067
1002
AVAHI_GCC_UNUSED AvahiStringList *txt,
1068
1003
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1069
1004
flags,
1070
void *mc){
1005
void* mc){
1071
1006
if(r == NULL){
1072
1007
return;
1073
1008
}
1076
1011
timed out */
1077
1012
1078
1013
if(quit_now){
1079
avahi_s_service_resolver_free(r);
1080
1014
return;
1081
1015
}
1082
1016
1127
1061
const char *domain,
1128
1062
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1129
1063
flags,
1130
void *mc){
1064
void* mc){
1131
1065
if(b == NULL){
1132
1066
return;
1133
1067
}
1193
1127
errno = old_errno;
1194
1128
}
1195
1129
1196
__attribute__((nonnull, warn_unused_result))
1197
1130
bool get_flags(const char *ifname, struct ifreq *ifr){
1198
1131
int ret;
1199
1132
error_t ret_errno;
1218
1151
return true;
1219
1152
}
1220
1153
1221
__attribute__((nonnull, warn_unused_result))
1222
1154
bool good_flags(const char *ifname, const struct ifreq *ifr){
1223
1155
1224
1156
/* Reject the loopback device */
1266
1198
* corresponds to an acceptable network device.
1267
1199
* (This function is passed to scandir(3) as a filter function.)
1268
1200
*/
1269
__attribute__((nonnull, warn_unused_result))
1270
1201
int good_interface(const struct dirent *if_entry){
1271
1202
if(if_entry->d_name[0] == '.'){
1272
1203
return 0;
1290
1221
/*
1291
1222
* This function determines if a network interface is up.
1292
1223
*/
1293
__attribute__((nonnull, warn_unused_result))
1294
1224
bool interface_is_up(const char *interface){
1295
1225
struct ifreq ifr;
1296
1226
if(not get_flags(interface, &ifr)){
1307
1237
/*
1308
1238
* This function determines if a network interface is running
1309
1239
*/
1310
__attribute__((nonnull, warn_unused_result))
1311
1240
bool interface_is_running(const char *interface){
1312
1241
struct ifreq ifr;
1313
1242
if(not get_flags(interface, &ifr)){
1321
1250
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1322
1251
}
1323
1252
1324
__attribute__((nonnull, pure, warn_unused_result))
1325
1253
int notdotentries(const struct dirent *direntry){
1326
1254
/* Skip "." and ".." */
1327
1255
if(direntry->d_name[0] == '.'
1334
1262
}
1335
1263
1336
1264
/* Is this directory entry a runnable program? */
1337
__attribute__((nonnull, warn_unused_result))
1338
1265
int runnable_hook(const struct dirent *direntry){
1339
1266
int ret;
1340
1267
size_t sret;
1348
1275
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1349
1276
"abcdefghijklmnopqrstuvwxyz"
1350
1277
"0123456789"
1351
"_.-");
1278
"_-");
1352
1279
if((direntry->d_name)[sret] != '\0'){
1353
1280
/* Contains non-allowed characters */
1354
1281
if(debug){
1358
1285
return 0;
1359
1286
}
1360
1287
1361
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);
1362
1296
if(ret == -1){
1363
1297
if(debug){
1364
1298
perror_plus("Could not stat hook");
1388
1322
return 1;
1389
1323
}
1390
1324
1391
__attribute__((nonnull, warn_unused_result))
1392
1325
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1393
1326
mandos_context *mc){
1394
1327
int ret;
1398
1331
1399
1332
while(true){
1400
1333
if(mc->current_server == NULL){
1401
if(debug){
1334
if (debug){
1402
1335
fprintf_plus(stderr, "Wait until first server is found."
1403
1336
" No timeout!\n");
1404
1337
}
1405
1338
ret = avahi_simple_poll_iterate(s, -1);
1406
1339
} else {
1407
if(debug){
1340
if (debug){
1408
1341
fprintf_plus(stderr, "Check current_server if we should run"
1409
1342
" it, or wait\n");
1410
1343
}
1427
1360
- ((intmax_t)waited_time.tv_sec * 1000))
1428
1361
- ((intmax_t)waited_time.tv_nsec / 1000000));
1429
1362
1430
if(debug){
1363
if (debug){
1431
1364
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1432
1365
block_time);
1433
1366
}
1455
1388
ret = avahi_simple_poll_iterate(s, (int)block_time);
1456
1389
}
1457
1390
if(ret != 0){
1458
if(ret > 0 or errno != EINTR){
1391
if (ret > 0 or errno != EINTR){
1459
1392
return (ret != 1) ? ret : 0;
1460
1393
}
1461
1394
}
1463
1396
}
1464
1397
1465
1398
/* Set effective uid to 0, return errno */
1466
__attribute__((warn_unused_result))
1467
1399
error_t raise_privileges(void){
1468
1400
error_t old_errno = errno;
1469
1401
error_t ret_errno = 0;
1470
1402
if(seteuid(0) == -1){
1471
1403
ret_errno = errno;
1404
perror_plus("seteuid");
1472
1405
}
1473
1406
errno = old_errno;
1474
1407
return ret_errno;
1475
1408
}
1476
1409
1477
1410
/* Set effective and real user ID to 0. Return errno. */
1478
__attribute__((warn_unused_result))
1479
1411
error_t raise_privileges_permanently(void){
1480
1412
error_t old_errno = errno;
1481
1413
error_t ret_errno = raise_privileges();
1485
1417
}
1486
1418
if(setuid(0) == -1){
1487
1419
ret_errno = errno;
1420
perror_plus("seteuid");
1488
1421
}
1489
1422
errno = old_errno;
1490
1423
return ret_errno;
1491
1424
}
1492
1425
1493
1426
/* Set effective user ID to unprivileged saved user ID */
1494
__attribute__((warn_unused_result))
1495
1427
error_t lower_privileges(void){
1496
1428
error_t old_errno = errno;
1497
1429
error_t ret_errno = 0;
1498
1430
if(seteuid(uid) == -1){
1499
1431
ret_errno = errno;
1432
perror_plus("seteuid");
1500
1433
}
1501
1434
errno = old_errno;
1502
1435
return ret_errno;
1503
1436
}
1504
1437
1505
1438
/* Lower privileges permanently */
1506
__attribute__((warn_unused_result))
1507
1439
error_t lower_privileges_permanently(void){
1508
1440
error_t old_errno = errno;
1509
1441
error_t ret_errno = 0;
1510
1442
if(setuid(uid) == -1){
1511
1443
ret_errno = errno;
1444
perror_plus("setuid");
1512
1445
}
1513
1446
errno = old_errno;
1514
1447
return ret_errno;
1515
1448
}
1516
1449
1517
__attribute__((nonnull))
1518
void run_network_hooks(const char *mode, const char *interface,
1450
bool run_network_hooks(const char *mode, const char *interface,
1519
1451
const float delay){
1520
struct dirent **direntries = NULL;
1521
if(hookdir_fd == -1){
1522
hookdir_fd = open(hookdir, O_RDONLY);
1523
if(hookdir_fd == -1){
1524
if(errno == ENOENT){
1525
if(debug){
1526
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1527
" found\n", hookdir);
1528
}
1529
} else {
1530
perror_plus("open");
1531
}
1532
return;
1533
}
1534
}
1535
#ifdef __GLIBC__
1536
#if __GLIBC_PREREQ(2, 15)
1537
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1538
runnable_hook, alphasort);
1539
#else /* not __GLIBC_PREREQ(2, 15) */
1540
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1541
alphasort);
1542
#endif /* not __GLIBC_PREREQ(2, 15) */
1543
#else /* not __GLIBC__ */
1544
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1545
alphasort);
1546
#endif /* not __GLIBC__ */
1452
struct dirent **direntries;
1453
struct dirent *direntry;
1454
int ret;
1455
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1456
alphasort);
1547
1457
if(numhooks == -1){
1548
perror_plus("scandir");
1549
return;
1550
}
1551
struct dirent *direntry;
1552
int ret;
1553
int devnull = open("/dev/null", O_RDONLY);
1554
for(int i = 0; i < numhooks; i++){
1555
direntry = direntries[i];
1556
if(debug){
1557
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1558
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");
1559
1465
}
1560
pid_t hook_pid = fork();
1561
if(hook_pid == 0){
1562
/* Child */
1563
/* Raise privileges */
1564
errno = raise_privileges_permanently();
1565
if(errno != 0){
1566
perror_plus("Failed to raise privileges");
1567
_exit(EX_NOPERM);
1568
}
1569
/* Set group */
1570
errno = 0;
1571
ret = setgid(0);
1572
if(ret == -1){
1573
perror_plus("setgid");
1574
_exit(EX_NOPERM);
1575
}
1576
/* Reset supplementary groups */
1577
errno = 0;
1578
ret = setgroups(0, NULL);
1579
if(ret == -1){
1580
perror_plus("setgroups");
1581
_exit(EX_NOPERM);
1582
}
1583
ret = dup2(devnull, STDIN_FILENO);
1584
if(ret == -1){
1585
perror_plus("dup2(devnull, STDIN_FILENO)");
1586
_exit(EX_OSERR);
1587
}
1588
ret = close(devnull);
1589
if(ret == -1){
1590
perror_plus("close");
1591
_exit(EX_OSERR);
1592
}
1593
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1594
if(ret == -1){
1595
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1596
_exit(EX_OSERR);
1597
}
1598
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1599
if(ret == -1){
1600
perror_plus("setenv");
1601
_exit(EX_OSERR);
1602
}
1603
ret = setenv("DEVICE", interface, 1);
1604
if(ret == -1){
1605
perror_plus("setenv");
1606
_exit(EX_OSERR);
1607
}
1608
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1609
if(ret == -1){
1610
perror_plus("setenv");
1611
_exit(EX_OSERR);
1612
}
1613
ret = setenv("MODE", mode, 1);
1614
if(ret == -1){
1615
perror_plus("setenv");
1616
_exit(EX_OSERR);
1617
}
1618
char *delaystring;
1619
ret = asprintf(&delaystring, "%f", (double)delay);
1620
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){
1621
1473
perror_plus("asprintf");
1622
_exit(EX_OSERR);
1623
}
1624
ret = setenv("DELAY", delaystring, 1);
1625
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
}
1626
1532
free(delaystring);
1627
perror_plus("setenv");
1628
_exit(EX_OSERR);
1629
}
1630
free(delaystring);
1631
if(connect_to != NULL){
1632
ret = setenv("CONNECT", connect_to, 1);
1633
if(ret == -1){
1634
perror_plus("setenv");
1635
_exit(EX_OSERR);
1636
}
1637
}
1638
int hook_fd = openat(hookdir_fd, direntry->d_name, O_RDONLY);
1639
if(hook_fd == -1){
1640
perror_plus("openat");
1641
_exit(EXIT_FAILURE);
1642
}
1643
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1644
perror_plus("close");
1645
_exit(EXIT_FAILURE);
1646
}
1647
if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },
1648
environ) == -1){
1649
perror_plus("fexecve");
1650
_exit(EXIT_FAILURE);
1651
}
1652
} else {
1653
int status;
1654
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1655
perror_plus("waitpid");
1656
free(direntry);
1657
continue;
1658
}
1659
if(WIFEXITED(status)){
1660
if(WEXITSTATUS(status) != 0){
1661
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1662
" with status %d\n", direntry->d_name,
1663
WEXITSTATUS(status));
1664
free(direntry);
1665
continue;
1666
}
1667
} else if(WIFSIGNALED(status)){
1668
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1669
" signal %d\n", direntry->d_name,
1670
WTERMSIG(status));
1671
free(direntry);
1672
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
}
1673
1544
} else {
1674
fprintf_plus(stderr, "Warning: network hook \"%s\""
1675
" crashed\n", direntry->d_name);
1676
free(direntry);
1677
continue;
1678
}
1679
}
1680
if(debug){
1681
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1682
direntry->d_name);
1683
}
1684
free(direntry);
1685
}
1686
free(direntries);
1687
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1688
perror_plus("close");
1689
} else {
1690
hookdir_fd = -1;
1691
}
1692
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;
1693
1581
}
1694
1582
1695
__attribute__((nonnull, warn_unused_result))
1696
1583
error_t bring_up_interface(const char *const interface,
1697
1584
const float delay){
1585
int sd = -1;
1698
1586
error_t old_errno = errno;
1699
int ret;
1587
error_t ret_errno = 0;
1588
int ret, ret_setflags;
1700
1589
struct ifreq network;
1701
1590
unsigned int if_index = if_nametoindex(interface);
1702
1591
if(if_index == 0){
1711
1600
}
1712
1601
1713
1602
if(not interface_is_up(interface)){
1714
error_t ret_errno = 0, ioctl_errno = 0;
1715
if(not get_flags(interface, &network)){
1603
if(not get_flags(interface, &network) and debug){
1716
1604
ret_errno = errno;
1717
1605
fprintf_plus(stderr, "Failed to get flags for interface "
1718
1606
"\"%s\"\n", interface);
1719
errno = old_errno;
1720
1607
return ret_errno;
1721
1608
}
1722
network.ifr_flags |= IFF_UP; /* set flag */
1609
network.ifr_flags |= IFF_UP;
1723
1610
1724
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1725
if(sd == -1){
1611
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1612
if(sd < 0){
1726
1613
ret_errno = errno;
1727
1614
perror_plus("socket");
1728
1615
errno = old_errno;
1729
1616
return ret_errno;
1730
1617
}
1731
1618
1732
1619
if(quit_now){
1733
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1734
if(ret == -1){
1735
perror_plus("close");
1736
}
1620
close(sd);
1737
1621
errno = old_errno;
1738
1622
return EINTR;
1739
1623
}
1743
1627
interface);
1744
1628
}
1745
1629
1746
/* Raise privileges */
1747
ret_errno = raise_privileges();
1748
if(ret_errno != 0){
1749
errno = ret_errno;
1750
perror_plus("Failed to raise privileges");
1751
}
1630
/* Raise priviliges */
1631
raise_privileges();
1752
1632
1753
1633
#ifdef __linux__
1754
int ret_linux;
1755
bool restore_loglevel = false;
1756
if(ret_errno == 0){
1757
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1758
messages about the network interface to mess up the prompt */
1759
ret_linux = klogctl(8, NULL, 5);
1760
if(ret_linux == -1){
1761
perror_plus("klogctl");
1762
} else {
1763
restore_loglevel = true;
1764
}
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");
1765
1641
}
1766
1642
#endif /* __linux__ */
1767
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1768
ioctl_errno = errno;
1643
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1644
ret_errno = errno;
1769
1645
#ifdef __linux__
1770
1646
if(restore_loglevel){
1771
1647
ret_linux = klogctl(7, NULL, 0);
1775
1651
}
1776
1652
#endif /* __linux__ */
1777
1653
1778
/* If raise_privileges() succeeded above */
1779
if(ret_errno == 0){
1780
/* Lower privileges */
1781
ret_errno = lower_privileges();
1782
if(ret_errno != 0){
1783
errno = ret_errno;
1784
perror_plus("Failed to lower privileges");
1785
}
1786
}
1654
/* Lower privileges */
1655
lower_privileges();
1787
1656
1788
1657
/* Close the socket */
1789
1658
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1792
1661
}
1793
1662
1794
1663
if(ret_setflags == -1){
1795
errno = ioctl_errno;
1664
errno = ret_errno;
1796
1665
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1797
1666
errno = old_errno;
1798
return ioctl_errno;
1667
return ret_errno;
1799
1668
}
1800
1669
} else if(debug){
1801
1670
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1819
1688
return 0;
1820
1689
}
1821
1690
1822
__attribute__((nonnull, warn_unused_result))
1823
1691
error_t take_down_interface(const char *const interface){
1692
int sd = -1;
1824
1693
error_t old_errno = errno;
1694
error_t ret_errno = 0;
1695
int ret, ret_setflags;
1825
1696
struct ifreq network;
1826
1697
unsigned int if_index = if_nametoindex(interface);
1827
1698
if(if_index == 0){
1830
1701
return ENXIO;
1831
1702
}
1832
1703
if(interface_is_up(interface)){
1833
error_t ret_errno = 0, ioctl_errno = 0;
1834
1704
if(not get_flags(interface, &network) and debug){
1835
1705
ret_errno = errno;
1836
1706
fprintf_plus(stderr, "Failed to get flags for interface "
1837
1707
"\"%s\"\n", interface);
1838
errno = old_errno;
1839
1708
return ret_errno;
1840
1709
}
1841
1710
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1842
1711
1843
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1844
if(sd == -1){
1712
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1713
if(sd < 0){
1845
1714
ret_errno = errno;
1846
1715
perror_plus("socket");
1847
1716
errno = old_errno;
1853
1722
interface);
1854
1723
}
1855
1724
1856
/* Raise privileges */
1857
ret_errno = raise_privileges();
1858
if(ret_errno != 0){
1859
errno = ret_errno;
1860
perror_plus("Failed to raise privileges");
1861
}
1862
1863
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1864
ioctl_errno = errno;
1865
1866
/* If raise_privileges() succeeded above */
1867
if(ret_errno == 0){
1868
/* Lower privileges */
1869
ret_errno = lower_privileges();
1870
if(ret_errno != 0){
1871
errno = ret_errno;
1872
perror_plus("Failed to lower privileges");
1873
}
1874
}
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();
1875
1733
1876
1734
/* Close the socket */
1877
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
1735
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1878
1736
if(ret == -1){
1879
1737
perror_plus("close");
1880
1738
}
1881
1739
1882
1740
if(ret_setflags == -1){
1883
errno = ioctl_errno;
1741
errno = ret_errno;
1884
1742
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1885
1743
errno = old_errno;
1886
return ioctl_errno;
1744
return ret_errno;
1887
1745
}
1888
1746
} else if(debug){
1889
1747
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1897
1755
int main(int argc, char *argv[]){
1898
1756
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1899
1757
.priority = "SECURE256:!CTYPE-X.509:"
1900
"+CTYPE-OPENPGP", .current_server = NULL,
1901
.interfaces = NULL, .interfaces_size = 0 };
1758
"+CTYPE-OPENPGP", .current_server = NULL };
1902
1759
AvahiSServiceBrowser *sb = NULL;
1903
1760
error_t ret_errno;
1904
1761
int ret;
1905
1762
intmax_t tmpmax;
1906
1763
char *tmp;
1907
1764
int exitcode = EXIT_SUCCESS;
1765
char *interfaces = NULL;
1766
size_t interfaces_size = 0;
1908
1767
char *interfaces_to_take_down = NULL;
1909
1768
size_t interfaces_to_take_down_size = 0;
1910
char run_tempdir[] = "/run/tmp/mandosXXXXXX";
1911
char old_tempdir[] = "/tmp/mandosXXXXXX";
1912
char *tempdir = NULL;
1769
char tempdir[] = "/tmp/mandosXXXXXX";
1770
bool tempdir_created = false;
1913
1771
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1914
1772
const char *seckey = PATHDIR "/" SECKEY;
1915
1773
const char *pubkey = PATHDIR "/" PUBKEY;
1916
1774
char *interfaces_hooks = NULL;
1775
size_t interfaces_hooks_size = 0;
1917
1776
1918
1777
bool gnutls_initialized = false;
1919
1778
bool gpgme_initialized = false;
2010
1869
connect_to = arg;
2011
1870
break;
2012
1871
case 'i': /* --interface */
2013
ret_errno = argz_add_sep(&mc.interfaces, &mc.interfaces_size,
2014
arg, (int)',');
1872
ret_errno = argz_add_sep(&interfaces, &interfaces_size, arg,
1873
(int)',');
2015
1874
if(ret_errno != 0){
2016
1875
argp_error(state, "%s", strerror(ret_errno));
2017
1876
}
2097
1956
/* Work around Debian bug #633582:
2098
1957
<http://bugs.debian.org/633582> */
2099
1958
2100
/* Re-raise privileges */
2101
ret_errno = raise_privileges();
2102
if(ret_errno != 0){
2103
errno = ret_errno;
2104
perror_plus("Failed to raise privileges");
2105
} else {
1959
/* Re-raise priviliges */
1960
if(raise_privileges() == 0){
2106
1961
struct stat st;
2107
1962
2108
1963
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2148
2003
}
2149
2004
2150
2005
/* Lower privileges */
2151
ret_errno = lower_privileges();
2152
if(ret_errno != 0){
2153
errno = ret_errno;
2154
perror_plus("Failed to lower privileges");
2006
errno = 0;
2007
ret = seteuid(uid);
2008
if(ret == -1){
2009
perror_plus("seteuid");
2155
2010
}
2156
2011
}
2157
2012
}
2158
2013
2159
/* Remove invalid interface names (except "none") */
2014
/* Remove empty interface names */
2160
2015
{
2161
2016
char *interface = NULL;
2162
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2017
while((interface = argz_next(interfaces, interfaces_size,
2163
2018
interface))){
2164
if(strcmp(interface, "none") != 0
2165
and if_nametoindex(interface) == 0){
2166
if(interface[0] != '\0'){
2019
if(if_nametoindex(interface) == 0){
2020
if(interface[0] != '\0' and strcmp(interface, "none") != 0){
2167
2021
fprintf_plus(stderr, "Not using nonexisting interface"
2168
2022
" \"%s\"\n", interface);
2169
2023
}
2170
argz_delete(&mc.interfaces, &mc.interfaces_size, interface);
2024
argz_delete(&interfaces, &interfaces_size, interface);
2171
2025
interface = NULL;
2172
2026
}
2173
2027
}
2175
2029
2176
2030
/* Run network hooks */
2177
2031
{
2178
if(mc.interfaces != NULL){
2179
interfaces_hooks = malloc(mc.interfaces_size);
2032
2033
if(interfaces != NULL){
2034
interfaces_hooks = malloc(interfaces_size);
2180
2035
if(interfaces_hooks == NULL){
2181
2036
perror_plus("malloc");
2182
2037
goto end;
2183
2038
}
2184
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2185
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2186
}
2187
run_network_hooks("start", interfaces_hooks != NULL ?
2188
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
}
2189
2048
}
2190
2049
2191
2050
if(not debug){
2268
2127
}
2269
2128
2270
2129
/* If no interfaces were specified, make a list */
2271
if(mc.interfaces == NULL){
2272
struct dirent **direntries = NULL;
2130
if(interfaces == NULL){
2131
struct dirent **direntries;
2273
2132
/* Look for any good interfaces */
2274
2133
ret = scandir(sys_class_net, &direntries, good_interface,
2275
2134
alphasort);
2276
2135
if(ret >= 1){
2277
2136
/* Add all found interfaces to interfaces list */
2278
2137
for(int i = 0; i < ret; ++i){
2279
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2138
ret_errno = argz_add(&interfaces, &interfaces_size,
2280
2139
direntries[i]->d_name);
2281
2140
if(ret_errno != 0){
2282
errno = ret_errno;
2283
2141
perror_plus("argz_add");
2284
free(direntries[i]);
2285
2142
continue;
2286
2143
}
2287
2144
if(debug){
2288
2145
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2289
2146
direntries[i]->d_name);
2290
2147
}
2291
free(direntries[i]);
2292
2148
}
2293
2149
free(direntries);
2294
2150
} else {
2295
if(ret == 0){
2296
free(direntries);
2297
}
2151
free(direntries);
2298
2152
fprintf_plus(stderr, "Could not find a network interface\n");
2299
2153
exitcode = EXIT_FAILURE;
2300
2154
goto end;
2301
2155
}
2302
2156
}
2303
2157
2304
/* Bring up interfaces which are down, and remove any "none"s */
2305
{
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)){
2306
2170
char *interface = NULL;
2307
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2171
while((interface = argz_next(interfaces, interfaces_size,
2308
2172
interface))){
2309
/* If interface name is "none", stop bringing up interfaces.
2310
Also remove all instances of "none" from the list */
2311
if(strcmp(interface, "none") == 0){
2312
argz_delete(&mc.interfaces, &mc.interfaces_size,
2313
interface);
2314
interface = NULL;
2315
while((interface = argz_next(mc.interfaces,
2316
mc.interfaces_size, interface))){
2317
if(strcmp(interface, "none") == 0){
2318
argz_delete(&mc.interfaces, &mc.interfaces_size,
2319
interface);
2320
interface = NULL;
2321
}
2322
}
2323
break;
2324
}
2325
2173
bool interface_was_up = interface_is_up(interface);
2326
errno = bring_up_interface(interface, delay);
2174
ret = bring_up_interface(interface, delay);
2327
2175
if(not interface_was_up){
2328
if(errno != 0){
2176
if(ret != 0){
2177
errno = ret;
2329
2178
perror_plus("Failed to bring up interface");
2330
2179
} else {
2331
errno = argz_add(&interfaces_to_take_down,
2332
&interfaces_to_take_down_size,
2333
interface);
2334
if(errno != 0){
2335
perror_plus("argz_add");
2336
}
2180
ret_errno = argz_add(&interfaces_to_take_down,
2181
&interfaces_to_take_down_size,
2182
interface);
2337
2183
}
2338
2184
}
2339
2185
}
2186
free(interfaces);
2187
interfaces = NULL;
2188
interfaces_size = 0;
2340
2189
if(debug and (interfaces_to_take_down == NULL)){
2341
2190
fprintf_plus(stderr, "No interfaces were brought up\n");
2342
2191
}
2343
2192
}
2344
2193
2345
/* If we only got one interface, explicitly use only that one */
2346
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
2347
if(debug){
2348
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2349
mc.interfaces);
2350
}
2351
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
2352
}
2353
2354
2194
if(quit_now){
2355
2195
goto end;
2356
2196
}
2368
2208
goto end;
2369
2209
}
2370
2210
2371
/* Try /run/tmp before /tmp */
2372
tempdir = mkdtemp(run_tempdir);
2373
if(tempdir == NULL and errno == ENOENT){
2374
if(debug){
2375
fprintf_plus(stderr, "Tempdir %s did not work, trying %s\n",
2376
run_tempdir, old_tempdir);
2377
}
2378
tempdir = mkdtemp(old_tempdir);
2379
}
2380
if(tempdir == NULL){
2211
if(mkdtemp(tempdir) == NULL){
2381
2212
perror_plus("mkdtemp");
2382
2213
goto end;
2383
2214
}
2215
tempdir_created = true;
2384
2216
2385
2217
if(quit_now){
2386
2218
goto end;
2422
2254
exitcode = EX_USAGE;
2423
2255
goto end;
2424
2256
}
2425
2257
2426
2258
if(quit_now){
2427
2259
goto end;
2428
2260
}
2458
2290
fprintf_plus(stderr, "Retrying in %d seconds\n",
2459
2291
(int)retry_interval);
2460
2292
}
2461
sleep((unsigned int)retry_interval);
2293
sleep((int)retry_interval);
2462
2294
}
2463
2295
2464
if(not quit_now){
2296
if (not quit_now){
2465
2297
exitcode = EXIT_SUCCESS;
2466
2298
}
2467
2299
2522
2354
if(debug){
2523
2355
fprintf_plus(stderr, "Starting Avahi loop search\n");
2524
2356
}
2525
2357
2526
2358
ret = avahi_loop_with_timeout(simple_poll,
2527
2359
(int)(retry_interval * 1000), &mc);
2528
2360
if(debug){
2537
2369
}
2538
2370
2539
2371
/* Cleanup things */
2540
free(mc.interfaces);
2541
2542
2372
if(sb != NULL)
2543
2373
avahi_s_service_browser_free(sb);
2544
2374
2564
2394
mc.current_server->prev->next = NULL;
2565
2395
while(mc.current_server != NULL){
2566
2396
server *next = mc.current_server->next;
2567
#ifdef __GNUC__
2568
#pragma GCC diagnostic push
2569
#pragma GCC diagnostic ignored "-Wcast-qual"
2570
#endif
2571
free((char *)(mc.current_server->ip));
2572
#ifdef __GNUC__
2573
#pragma GCC diagnostic pop
2574
#endif
2575
2397
free(mc.current_server);
2576
2398
mc.current_server = next;
2577
2399
}
2578
2400
}
2579
2401
2580
/* Re-raise privileges */
2402
/* Re-raise priviliges */
2581
2403
{
2582
ret_errno = raise_privileges();
2583
if(ret_errno != 0){
2584
errno = ret_errno;
2585
perror_plus("Failed to raise privileges");
2586
} else {
2587
2588
/* Run network hooks */
2589
run_network_hooks("stop", interfaces_hooks != NULL ?
2590
interfaces_hooks : "", delay);
2591
2592
/* Take down the network interfaces which were brought up */
2593
{
2594
char *interface = NULL;
2595
while((interface=argz_next(interfaces_to_take_down,
2596
interfaces_to_take_down_size,
2597
interface))){
2598
ret_errno = take_down_interface(interface);
2599
if(ret_errno != 0){
2600
errno = ret_errno;
2601
perror_plus("Failed to take down interface");
2602
}
2603
}
2604
if(debug and (interfaces_to_take_down == NULL)){
2605
fprintf_plus(stderr, "No interfaces needed to be taken"
2606
" down\n");
2607
}
2608
}
2609
}
2610
2611
ret_errno = lower_privileges_permanently();
2612
if(ret_errno != 0){
2613
errno = ret_errno;
2614
perror_plus("Failed to lower privileges permanently");
2615
}
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();
2616
2429
}
2617
2430
2618
2431
free(interfaces_to_take_down);
2619
2432
free(interfaces_hooks);
2620
2433
2621
2434
/* Removes the GPGME temp directory and all files inside */
2622
if(tempdir != NULL){
2435
if(tempdir_created){
2623
2436
struct dirent **direntries = NULL;
2624
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY |
2625
O_NOFOLLOW));
2626
if(tempdir_fd == -1){
2627
perror_plus("open");
2628
} else {
2629
#ifdef __GLIBC__
2630
#if __GLIBC_PREREQ(2, 15)
2631
int numentries = scandirat(tempdir_fd, ".", &direntries,
2632
notdotentries, alphasort);
2633
#else /* not __GLIBC_PREREQ(2, 15) */
2634
int numentries = scandir(tempdir, &direntries, notdotentries,
2635
alphasort);
2636
#endif /* not __GLIBC_PREREQ(2, 15) */
2637
#else /* not __GLIBC__ */
2638
int numentries = scandir(tempdir, &direntries, notdotentries,
2639
alphasort);
2640
#endif /* not __GLIBC__ */
2641
if(numentries >= 0){
2642
for(int i = 0; i < numentries; i++){
2643
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
2644
if(ret == -1){
2645
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
2646
" \"%s\", 0): %s\n", tempdir,
2647
direntries[i]->d_name, strerror(errno));
2648
}
2649
free(direntries[i]);
2650
}
2651
2652
/* need to clean even if 0 because man page doesn't specify */
2653
free(direntries);
2654
if(numentries == -1){
2655
perror_plus("scandir");
2656
}
2657
ret = rmdir(tempdir);
2658
if(ret == -1 and errno != ENOENT){
2659
perror_plus("rmdir");
2660
}
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);
2661
2456
}
2662
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");
2663
2467
}
2664
2468
}
2665
2469
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0