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- Committer: Teddy Hogeborn
- Date: 2014-06-22 02:19:30 UTC
- Revision ID: teddy@recompile.se-20140622021930-icl7h4cm97blhjml
mandos-keygen: Generate "checker" option to use SSH fingerprints.
To turn this off, use a new "--no-ssh" option to mandos-keygen.
* INSTALL (Mandos Server, Mandos Client): Document new suggested
installation of SSH.
* Makefile (confdir/clients.conf): Use new "--no-ssh" option to
"mandos-keygen".
* debian/control (mandos/Depends): Changed to "fping | ssh-client".
(mandos-client/Recommends): New; set to "ssh".
* intro.xml (FREQUENTLY ASKED QUESTIONS): Rename and rewrite section
called "Faking ping
replies?" to address new
default behavior.
* mandos-clients.conf.xml (OPTIONS/checker): Briefly discuss new
behavior of
mandos-keygen.
* mandos-keygen: Bug fix: Suppress failure output of "shred" to remove
"sec*", since no such files may exist.
(password mode): Scan for SSH key fingerprints and output as new
"checker" and "ssh_fingerprint" options, unless new
"--no-ssh" option is given.
* mandos-keygen.xml (SYNOPSIS/--force): Bug fix: Document short form.
(OPTIONS/--no-ssh): New.
(SEE ALSO): Add reference "ssh-keyscan(1)".
* plugins.d/mandos-client.xml (SECURITY): Briefly mention the
possibility of using SSH key
fingerprints for checking.
To turn this off, use a new "--no-ssh" option to mandos-keygen.
* INSTALL (Mandos Server, Mandos Client): Document new suggested
installation of SSH.
* Makefile (confdir/clients.conf): Use new "--no-ssh" option to
"mandos-keygen".
* debian/control (mandos/Depends): Changed to "fping | ssh-client".
(mandos-client/Recommends): New; set to "ssh".
* intro.xml (FREQUENTLY ASKED QUESTIONS): Rename and rewrite section
called "Faking ping
replies?" to address new
default behavior.
* mandos-clients.conf.xml (OPTIONS/checker): Briefly discuss new
behavior of
mandos-keygen.
* mandos-keygen: Bug fix: Suppress failure output of "shred" to remove
"sec*", since no such files may exist.
(password mode): Scan for SSH key fingerprints and output as new
"checker" and "ssh_fingerprint" options, unless new
"--no-ssh" option is given.
* mandos-keygen.xml (SYNOPSIS/--force): Bug fix: Document short form.
(OPTIONS/--no-ssh): New.
(SEE ALSO): Add reference "ssh-keyscan(1)".
* plugins.d/mandos-client.xml (SECURITY): Briefly mention the
possibility of using SSH key
fingerprints for checking.
- files added:
- 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 © 2008-2012 Teddy Hogeborn
13
* Copyright © 2008-2012 Björn Påhlsson
12
* Copyright © 2008-2014 Teddy Hogeborn
13
* Copyright © 2008-2014 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
35
#endif /* not _LARGEFILE_SOURCE */
36
36
#ifndef _FILE_OFFSET_BITS
37
37
#define _FILE_OFFSET_BITS 64
38
#endif
38
#endif /* not _FILE_OFFSET_BITS */
39
39
40
40
#define _GNU_SOURCE /* TEMP_FAILURE_RETRY(), asprintf() */
41
41
42
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
stdout, ferror(), remove() */
43
stdout, ferror() */
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
#include <fcntl.h> /* open() */
58
inet_pton(), connect(),
59
getnameinfo() */
60
#include <fcntl.h> /* open(), unlinkat() */
60
61
#include <dirent.h> /* opendir(), struct dirent, readdir()
61
62
*/
62
63
#include <inttypes.h> /* PRIu16, PRIdMAX, intmax_t,
72
73
*/
73
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
74
75
getuid(), getgid(), seteuid(),
75
setgid(), pause(), _exit() */
76
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
76
setgid(), pause(), _exit(),
77
unlinkat() */
78
#include <arpa/inet.h> /* inet_pton(), htons() */
77
79
#include <iso646.h> /* not, or, and */
78
80
#include <argp.h> /* struct argp_option, error_t, struct
79
81
argp_state, struct argp,
91
93
argz_delete(), argz_append(),
92
94
argz_stringify(), argz_add(),
93
95
argz_count() */
96
#include <netdb.h> /* getnameinfo(), NI_NUMERICHOST,
97
EAI_SYSTEM, gai_strerror() */
94
98
95
99
#ifdef __linux__
96
100
#include <sys/klog.h> /* klogctl() */
138
142
static const char sys_class_net[] = "/sys/class/net";
139
143
char *connect_to = NULL;
140
144
const char *hookdir = HOOKDIR;
145
int hookdir_fd = -1;
141
146
uid_t uid = 65534;
142
147
gid_t gid = 65534;
143
148
161
166
const char *priority;
162
167
gpgme_ctx_t ctx;
163
168
server *current_server;
169
char *interfaces;
170
size_t interfaces_size;
164
171
} mandos_context;
165
172
166
173
/* global so signal handler can reach it*/
178
185
perror(print_text);
179
186
}
180
187
181
__attribute__((format (gnu_printf, 2, 3)))
188
__attribute__((format (gnu_printf, 2, 3), nonnull))
182
189
int fprintf_plus(FILE *stream, const char *format, ...){
183
190
va_list ap;
184
191
va_start (ap, format);
185
192
186
193
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
187
194
program_invocation_short_name));
188
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
195
return (int)TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
189
196
}
190
197
191
198
/*
193
200
* bytes. "buffer_capacity" is how much is currently allocated,
194
201
* "buffer_length" is how much is already used.
195
202
*/
203
__attribute__((nonnull, warn_unused_result))
196
204
size_t incbuffer(char **buffer, size_t buffer_length,
197
205
size_t buffer_capacity){
198
206
if(buffer_length + BUFFER_SIZE > buffer_capacity){
199
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
200
if(buffer == NULL){
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;
201
213
return 0;
202
214
}
215
*buffer = new_buf;
203
216
buffer_capacity += BUFFER_SIZE;
204
217
}
205
218
return buffer_capacity;
206
219
}
207
220
208
221
/* Add server to set of servers to retry periodically */
222
__attribute__((nonnull, warn_unused_result))
209
223
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
210
224
int af, server **current_server){
211
225
int ret;
222
236
perror_plus("strdup");
223
237
return false;
224
238
}
239
ret = clock_gettime(CLOCK_MONOTONIC, &(new_server->last_seen));
240
if(ret == -1){
241
perror_plus("clock_gettime");
242
return false;
243
}
225
244
/* Special case of first server */
226
245
if(*current_server == NULL){
227
246
new_server->next = new_server;
228
247
new_server->prev = new_server;
229
248
*current_server = new_server;
230
/* Place the new server last in the list */
231
249
} else {
250
/* Place the new server last in the list */
232
251
new_server->next = *current_server;
233
252
new_server->prev = (*current_server)->prev;
234
253
new_server->prev->next = new_server;
235
254
(*current_server)->prev = new_server;
236
255
}
237
ret = clock_gettime(CLOCK_MONOTONIC, &(*current_server)->last_seen);
238
if(ret == -1){
239
perror_plus("clock_gettime");
240
return false;
241
}
242
256
return true;
243
257
}
244
258
245
259
/*
246
260
* Initialize GPGME.
247
261
*/
248
static bool init_gpgme(const char *seckey, const char *pubkey,
249
const char *tempdir, mandos_context *mc){
262
__attribute__((nonnull, warn_unused_result))
263
static bool init_gpgme(const char * const seckey,
264
const char * const pubkey,
265
const char * const tempdir,
266
mandos_context *mc){
250
267
gpgme_error_t rc;
251
268
gpgme_engine_info_t engine_info;
252
269
253
270
/*
254
271
* Helper function to insert pub and seckey to the engine keyring.
255
272
*/
256
bool import_key(const char *filename){
273
bool import_key(const char * const filename){
257
274
int ret;
258
275
int fd;
259
276
gpgme_data_t pgp_data;
340
357
* Decrypt OpenPGP data.
341
358
* Returns -1 on error
342
359
*/
360
__attribute__((nonnull, warn_unused_result))
343
361
static ssize_t pgp_packet_decrypt(const char *cryptotext,
344
362
size_t crypto_size,
345
363
char **plaintext,
465
483
return plaintext_length;
466
484
}
467
485
468
static const char * safer_gnutls_strerror(int value){
486
__attribute__((warn_unused_result))
487
static const char *safer_gnutls_strerror(int value){
469
488
const char *ret = gnutls_strerror(value);
470
489
if(ret == NULL)
471
490
ret = "(unknown)";
473
492
}
474
493
475
494
/* GnuTLS log function callback */
495
__attribute__((nonnull))
476
496
static void debuggnutls(__attribute__((unused)) int level,
477
497
const char* string){
478
498
fprintf_plus(stderr, "GnuTLS: %s", string);
479
499
}
480
500
501
__attribute__((nonnull, warn_unused_result))
481
502
static int init_gnutls_global(const char *pubkeyfilename,
482
503
const char *seckeyfilename,
483
504
mandos_context *mc){
557
578
return -1;
558
579
}
559
580
581
__attribute__((nonnull, warn_unused_result))
560
582
static int init_gnutls_session(gnutls_session_t *session,
561
583
mandos_context *mc){
562
584
int ret;
619
641
__attribute__((unused)) const char *txt){}
620
642
621
643
/* Called when a Mandos server is found */
644
__attribute__((nonnull, warn_unused_result))
622
645
static int start_mandos_communication(const char *ip, in_port_t port,
623
646
AvahiIfIndex if_index,
624
647
int af, mandos_context *mc){
625
648
int ret, tcp_sd = -1;
626
649
ssize_t sret;
627
union {
628
struct sockaddr_in in;
629
struct sockaddr_in6 in6;
630
} to;
650
struct sockaddr_storage to;
631
651
char *buffer = NULL;
632
652
char *decrypted_buffer = NULL;
633
653
size_t buffer_length = 0;
657
677
return -1;
658
678
}
659
679
680
/* If the interface is specified and we have a list of interfaces */
681
if(if_index != AVAHI_IF_UNSPEC and mc->interfaces != NULL){
682
/* Check if the interface is one of the interfaces we are using */
683
bool match = false;
684
{
685
char *interface = NULL;
686
while((interface=argz_next(mc->interfaces, mc->interfaces_size,
687
interface))){
688
if(if_nametoindex(interface) == (unsigned int)if_index){
689
match = true;
690
break;
691
}
692
}
693
}
694
if(not match){
695
/* This interface does not match any in the list, so we don't
696
connect to the server */
697
if(debug){
698
char interface[IF_NAMESIZE];
699
if(if_indextoname((unsigned int)if_index, interface) == NULL){
700
perror_plus("if_indextoname");
701
} else {
702
fprintf_plus(stderr, "Skipping server on non-used interface"
703
" \"%s\"\n",
704
if_indextoname((unsigned int)if_index,
705
interface));
706
}
707
}
708
return -1;
709
}
710
}
711
660
712
ret = init_gnutls_session(&session, mc);
661
713
if(ret != 0){
662
714
return -1;
682
734
683
735
memset(&to, 0, sizeof(to));
684
736
if(af == AF_INET6){
685
to.in6.sin6_family = (sa_family_t)af;
686
ret = inet_pton(af, ip, &to.in6.sin6_addr);
737
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
738
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
687
739
} else { /* IPv4 */
688
to.in.sin_family = (sa_family_t)af;
689
ret = inet_pton(af, ip, &to.in.sin_addr);
740
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
741
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
690
742
}
691
743
if(ret < 0 ){
692
744
int e = errno;
701
753
goto mandos_end;
702
754
}
703
755
if(af == AF_INET6){
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*/
756
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
757
if(IN6_IS_ADDR_LINKLOCAL
758
(&((struct sockaddr_in6 *)&to)->sin6_addr)){
708
759
if(if_index == AVAHI_IF_UNSPEC){
709
760
fprintf_plus(stderr, "An IPv6 link-local address is"
710
761
" incomplete without a network interface\n");
712
763
goto mandos_end;
713
764
}
714
765
/* Set the network interface number as scope */
715
to.in6.sin6_scope_id = (uint32_t)if_index;
766
((struct sockaddr_in6 *)&to)->sin6_scope_id = (uint32_t)if_index;
716
767
}
717
768
} else {
718
to.in.sin_port = htons(port); /* Spurious warnings from
719
-Wconversion and
720
-Wunreachable-code */
769
((struct sockaddr_in *)&to)->sin_port = htons(port);
721
770
}
722
771
723
772
if(quit_now){
740
789
}
741
790
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
742
791
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
743
const char *pcret;
744
792
if(af == AF_INET6){
745
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
746
sizeof(addrstr));
793
ret = getnameinfo((struct sockaddr *)&to,
794
sizeof(struct sockaddr_in6),
795
addrstr, sizeof(addrstr), NULL, 0,
796
NI_NUMERICHOST);
747
797
} else {
748
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
749
sizeof(addrstr));
798
ret = getnameinfo((struct sockaddr *)&to,
799
sizeof(struct sockaddr_in),
800
addrstr, sizeof(addrstr), NULL, 0,
801
NI_NUMERICHOST);
750
802
}
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
}
803
if(ret == EAI_SYSTEM){
804
perror_plus("getnameinfo");
805
} else if(ret != 0) {
806
fprintf_plus(stderr, "getnameinfo: %s", gai_strerror(ret));
807
} else if(strcmp(addrstr, ip) != 0){
808
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
757
809
}
758
810
}
759
811
763
815
}
764
816
765
817
if(af == AF_INET6){
766
ret = connect(tcp_sd, &to.in6, sizeof(to));
818
ret = connect(tcp_sd, (struct sockaddr *)&to,
819
sizeof(struct sockaddr_in6));
767
820
} else {
768
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
821
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
822
sizeof(struct sockaddr_in));
769
823
}
770
824
if(ret < 0){
771
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
825
if((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
772
826
int e = errno;
773
827
perror_plus("connect");
774
828
errno = e;
989
1043
return retval;
990
1044
}
991
1045
1046
__attribute__((nonnull))
992
1047
static void resolve_callback(AvahiSServiceResolver *r,
993
1048
AvahiIfIndex interface,
994
1049
AvahiProtocol proto,
1002
1057
AVAHI_GCC_UNUSED AvahiStringList *txt,
1003
1058
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1004
1059
flags,
1005
void* mc){
1060
void *mc){
1006
1061
if(r == NULL){
1007
1062
return;
1008
1063
}
1061
1116
const char *domain,
1062
1117
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1063
1118
flags,
1064
void* mc){
1119
void *mc){
1065
1120
if(b == NULL){
1066
1121
return;
1067
1122
}
1127
1182
errno = old_errno;
1128
1183
}
1129
1184
1185
__attribute__((nonnull, warn_unused_result))
1130
1186
bool get_flags(const char *ifname, struct ifreq *ifr){
1131
1187
int ret;
1132
1188
error_t ret_errno;
1151
1207
return true;
1152
1208
}
1153
1209
1210
__attribute__((nonnull, warn_unused_result))
1154
1211
bool good_flags(const char *ifname, const struct ifreq *ifr){
1155
1212
1156
1213
/* Reject the loopback device */
1198
1255
* corresponds to an acceptable network device.
1199
1256
* (This function is passed to scandir(3) as a filter function.)
1200
1257
*/
1258
__attribute__((nonnull, warn_unused_result))
1201
1259
int good_interface(const struct dirent *if_entry){
1202
1260
if(if_entry->d_name[0] == '.'){
1203
1261
return 0;
1221
1279
/*
1222
1280
* This function determines if a network interface is up.
1223
1281
*/
1282
__attribute__((nonnull, warn_unused_result))
1224
1283
bool interface_is_up(const char *interface){
1225
1284
struct ifreq ifr;
1226
1285
if(not get_flags(interface, &ifr)){
1237
1296
/*
1238
1297
* This function determines if a network interface is running
1239
1298
*/
1299
__attribute__((nonnull, warn_unused_result))
1240
1300
bool interface_is_running(const char *interface){
1241
1301
struct ifreq ifr;
1242
1302
if(not get_flags(interface, &ifr)){
1250
1310
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1251
1311
}
1252
1312
1313
__attribute__((nonnull, pure, warn_unused_result))
1253
1314
int notdotentries(const struct dirent *direntry){
1254
1315
/* Skip "." and ".." */
1255
1316
if(direntry->d_name[0] == '.'
1262
1323
}
1263
1324
1264
1325
/* Is this directory entry a runnable program? */
1326
__attribute__((nonnull, warn_unused_result))
1265
1327
int runnable_hook(const struct dirent *direntry){
1266
1328
int ret;
1267
1329
size_t sret;
1275
1337
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1276
1338
"abcdefghijklmnopqrstuvwxyz"
1277
1339
"0123456789"
1278
"_-");
1340
"_.-");
1279
1341
if((direntry->d_name)[sret] != '\0'){
1280
1342
/* Contains non-allowed characters */
1281
1343
if(debug){
1285
1347
return 0;
1286
1348
}
1287
1349
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);
1350
ret = fstatat(hookdir_fd, direntry->d_name, &st, 0);
1296
1351
if(ret == -1){
1297
1352
if(debug){
1298
1353
perror_plus("Could not stat hook");
1322
1377
return 1;
1323
1378
}
1324
1379
1380
__attribute__((nonnull, warn_unused_result))
1325
1381
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1326
1382
mandos_context *mc){
1327
1383
int ret;
1331
1387
1332
1388
while(true){
1333
1389
if(mc->current_server == NULL){
1334
if (debug){
1390
if(debug){
1335
1391
fprintf_plus(stderr, "Wait until first server is found."
1336
1392
" No timeout!\n");
1337
1393
}
1338
1394
ret = avahi_simple_poll_iterate(s, -1);
1339
1395
} else {
1340
if (debug){
1396
if(debug){
1341
1397
fprintf_plus(stderr, "Check current_server if we should run"
1342
1398
" it, or wait\n");
1343
1399
}
1360
1416
- ((intmax_t)waited_time.tv_sec * 1000))
1361
1417
- ((intmax_t)waited_time.tv_nsec / 1000000));
1362
1418
1363
if (debug){
1419
if(debug){
1364
1420
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1365
1421
block_time);
1366
1422
}
1388
1444
ret = avahi_simple_poll_iterate(s, (int)block_time);
1389
1445
}
1390
1446
if(ret != 0){
1391
if (ret > 0 or errno != EINTR){
1447
if(ret > 0 or errno != EINTR){
1392
1448
return (ret != 1) ? ret : 0;
1393
1449
}
1394
1450
}
1396
1452
}
1397
1453
1398
1454
/* Set effective uid to 0, return errno */
1455
__attribute__((warn_unused_result))
1399
1456
error_t raise_privileges(void){
1400
1457
error_t old_errno = errno;
1401
1458
error_t ret_errno = 0;
1402
1459
if(seteuid(0) == -1){
1403
1460
ret_errno = errno;
1404
perror_plus("seteuid");
1405
1461
}
1406
1462
errno = old_errno;
1407
1463
return ret_errno;
1408
1464
}
1409
1465
1410
1466
/* Set effective and real user ID to 0. Return errno. */
1467
__attribute__((warn_unused_result))
1411
1468
error_t raise_privileges_permanently(void){
1412
1469
error_t old_errno = errno;
1413
1470
error_t ret_errno = raise_privileges();
1417
1474
}
1418
1475
if(setuid(0) == -1){
1419
1476
ret_errno = errno;
1420
perror_plus("seteuid");
1421
1477
}
1422
1478
errno = old_errno;
1423
1479
return ret_errno;
1424
1480
}
1425
1481
1426
1482
/* Set effective user ID to unprivileged saved user ID */
1483
__attribute__((warn_unused_result))
1427
1484
error_t lower_privileges(void){
1428
1485
error_t old_errno = errno;
1429
1486
error_t ret_errno = 0;
1430
1487
if(seteuid(uid) == -1){
1431
1488
ret_errno = errno;
1432
perror_plus("seteuid");
1433
1489
}
1434
1490
errno = old_errno;
1435
1491
return ret_errno;
1436
1492
}
1437
1493
1438
1494
/* Lower privileges permanently */
1495
__attribute__((warn_unused_result))
1439
1496
error_t lower_privileges_permanently(void){
1440
1497
error_t old_errno = errno;
1441
1498
error_t ret_errno = 0;
1442
1499
if(setuid(uid) == -1){
1443
1500
ret_errno = errno;
1444
perror_plus("setuid");
1445
1501
}
1446
1502
errno = old_errno;
1447
1503
return ret_errno;
1448
1504
}
1449
1505
1450
bool run_network_hooks(const char *mode, const char *interface,
1506
__attribute__((nonnull))
1507
void run_network_hooks(const char *mode, const char *interface,
1451
1508
const float delay){
1452
struct dirent **direntries;
1509
struct dirent **direntries = NULL;
1510
if(hookdir_fd == -1){
1511
hookdir_fd = open(hookdir, O_RDONLY);
1512
if(hookdir_fd == -1){
1513
if(errno == ENOENT){
1514
if(debug){
1515
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1516
" found\n", hookdir);
1517
}
1518
} else {
1519
perror_plus("open");
1520
}
1521
return;
1522
}
1523
}
1524
#ifdef __GLIBC__
1525
#if __GLIBC_PREREQ(2, 15)
1526
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1527
runnable_hook, alphasort);
1528
#else /* not __GLIBC_PREREQ(2, 15) */
1529
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1530
alphasort);
1531
#endif /* not __GLIBC_PREREQ(2, 15) */
1532
#else /* not __GLIBC__ */
1533
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1534
alphasort);
1535
#endif /* not __GLIBC__ */
1536
if(numhooks == -1){
1537
perror_plus("scandir");
1538
return;
1539
}
1453
1540
struct dirent *direntry;
1454
1541
int ret;
1455
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1456
alphasort);
1457
if(numhooks == -1){
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");
1542
int devnull = open("/dev/null", O_RDONLY);
1543
for(int i = 0; i < numhooks; i++){
1544
direntry = direntries[i];
1545
if(debug){
1546
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1547
direntry->d_name);
1465
1548
}
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){
1549
pid_t hook_pid = fork();
1550
if(hook_pid == 0){
1551
/* Child */
1552
/* Raise privileges */
1553
errno = raise_privileges_permanently();
1554
if(errno != 0){
1555
perror_plus("Failed to raise privileges");
1556
_exit(EX_NOPERM);
1557
}
1558
/* Set group */
1559
errno = 0;
1560
ret = setgid(0);
1561
if(ret == -1){
1562
perror_plus("setgid");
1563
_exit(EX_NOPERM);
1564
}
1565
/* Reset supplementary groups */
1566
errno = 0;
1567
ret = setgroups(0, NULL);
1568
if(ret == -1){
1569
perror_plus("setgroups");
1570
_exit(EX_NOPERM);
1571
}
1572
ret = dup2(devnull, STDIN_FILENO);
1573
if(ret == -1){
1574
perror_plus("dup2(devnull, STDIN_FILENO)");
1575
_exit(EX_OSERR);
1576
}
1577
ret = close(devnull);
1578
if(ret == -1){
1579
perror_plus("close");
1580
_exit(EX_OSERR);
1581
}
1582
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1583
if(ret == -1){
1584
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1585
_exit(EX_OSERR);
1586
}
1587
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1588
if(ret == -1){
1589
perror_plus("setenv");
1590
_exit(EX_OSERR);
1591
}
1592
ret = setenv("DEVICE", interface, 1);
1593
if(ret == -1){
1594
perror_plus("setenv");
1595
_exit(EX_OSERR);
1596
}
1597
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1598
if(ret == -1){
1599
perror_plus("setenv");
1600
_exit(EX_OSERR);
1601
}
1602
ret = setenv("MODE", mode, 1);
1603
if(ret == -1){
1604
perror_plus("setenv");
1605
_exit(EX_OSERR);
1606
}
1607
char *delaystring;
1608
ret = asprintf(&delaystring, "%f", (double)delay);
1609
if(ret == -1){
1473
1610
perror_plus("asprintf");
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
}
1611
_exit(EX_OSERR);
1612
}
1613
ret = setenv("DELAY", delaystring, 1);
1614
if(ret == -1){
1532
1615
free(delaystring);
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
}
1616
perror_plus("setenv");
1617
_exit(EX_OSERR);
1618
}
1619
free(delaystring);
1620
if(connect_to != NULL){
1621
ret = setenv("CONNECT", connect_to, 1);
1622
if(ret == -1){
1623
perror_plus("setenv");
1624
_exit(EX_OSERR);
1625
}
1626
}
1627
int hook_fd = openat(hookdir_fd, direntry->d_name, O_RDONLY);
1628
if(hook_fd == -1){
1629
perror_plus("openat");
1630
_exit(EXIT_FAILURE);
1631
}
1632
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1633
perror_plus("close");
1634
_exit(EXIT_FAILURE);
1635
}
1636
if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },
1637
environ) == -1){
1638
perror_plus("fexecve");
1639
_exit(EXIT_FAILURE);
1640
}
1641
} else {
1642
int status;
1643
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1644
perror_plus("waitpid");
1645
continue;
1646
}
1647
if(WIFEXITED(status)){
1648
if(WEXITSTATUS(status) != 0){
1649
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1650
" with status %d\n", direntry->d_name,
1651
WEXITSTATUS(status));
1652
continue;
1653
}
1654
} else if(WIFSIGNALED(status)){
1655
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1656
" signal %d\n", direntry->d_name,
1657
WTERMSIG(status));
1658
continue;
1544
1659
} else {
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;
1660
fprintf_plus(stderr, "Warning: network hook \"%s\""
1661
" crashed\n", direntry->d_name);
1662
continue;
1663
}
1664
}
1665
if(debug){
1666
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1667
direntry->d_name);
1668
}
1669
}
1670
free(direntries);
1671
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1672
perror_plus("close");
1673
} else {
1674
hookdir_fd = -1;
1675
}
1676
close(devnull);
1581
1677
}
1582
1678
1679
__attribute__((nonnull, warn_unused_result))
1583
1680
error_t bring_up_interface(const char *const interface,
1584
1681
const float delay){
1585
int sd = -1;
1586
1682
error_t old_errno = errno;
1587
error_t ret_errno = 0;
1588
int ret, ret_setflags;
1683
int ret;
1589
1684
struct ifreq network;
1590
1685
unsigned int if_index = if_nametoindex(interface);
1591
1686
if(if_index == 0){
1600
1695
}
1601
1696
1602
1697
if(not interface_is_up(interface)){
1603
if(not get_flags(interface, &network) and debug){
1698
error_t ret_errno = 0, ioctl_errno = 0;
1699
if(not get_flags(interface, &network)){
1604
1700
ret_errno = errno;
1605
1701
fprintf_plus(stderr, "Failed to get flags for interface "
1606
1702
"\"%s\"\n", interface);
1703
errno = old_errno;
1607
1704
return ret_errno;
1608
1705
}
1609
network.ifr_flags |= IFF_UP;
1706
network.ifr_flags |= IFF_UP; /* set flag */
1610
1707
1611
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1612
if(sd < 0){
1708
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1709
if(sd == -1){
1613
1710
ret_errno = errno;
1614
1711
perror_plus("socket");
1615
1712
errno = old_errno;
1616
1713
return ret_errno;
1617
1714
}
1618
1715
1619
1716
if(quit_now){
1620
close(sd);
1717
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1718
if(ret == -1){
1719
perror_plus("close");
1720
}
1621
1721
errno = old_errno;
1622
1722
return EINTR;
1623
1723
}
1627
1727
interface);
1628
1728
}
1629
1729
1630
/* Raise priviliges */
1631
raise_privileges();
1730
/* Raise privileges */
1731
ret_errno = raise_privileges();
1732
if(ret_errno != 0){
1733
errno = ret_errno;
1734
perror_plus("Failed to raise privileges");
1735
}
1632
1736
1633
1737
#ifdef __linux__
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");
1738
int ret_linux;
1739
bool restore_loglevel = false;
1740
if(ret_errno == 0){
1741
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1742
messages about the network interface to mess up the prompt */
1743
ret_linux = klogctl(8, NULL, 5);
1744
if(ret_linux == -1){
1745
perror_plus("klogctl");
1746
} else {
1747
restore_loglevel = true;
1748
}
1641
1749
}
1642
1750
#endif /* __linux__ */
1643
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1644
ret_errno = errno;
1751
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1752
ioctl_errno = errno;
1645
1753
#ifdef __linux__
1646
1754
if(restore_loglevel){
1647
1755
ret_linux = klogctl(7, NULL, 0);
1651
1759
}
1652
1760
#endif /* __linux__ */
1653
1761
1654
/* Lower privileges */
1655
lower_privileges();
1762
/* If raise_privileges() succeeded above */
1763
if(ret_errno == 0){
1764
/* Lower privileges */
1765
ret_errno = lower_privileges();
1766
if(ret_errno != 0){
1767
errno = ret_errno;
1768
perror_plus("Failed to lower privileges");
1769
}
1770
}
1656
1771
1657
1772
/* Close the socket */
1658
1773
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1661
1776
}
1662
1777
1663
1778
if(ret_setflags == -1){
1664
errno = ret_errno;
1779
errno = ioctl_errno;
1665
1780
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1666
1781
errno = old_errno;
1667
return ret_errno;
1782
return ioctl_errno;
1668
1783
}
1669
1784
} else if(debug){
1670
1785
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1688
1803
return 0;
1689
1804
}
1690
1805
1806
__attribute__((nonnull, warn_unused_result))
1691
1807
error_t take_down_interface(const char *const interface){
1692
int sd = -1;
1693
1808
error_t old_errno = errno;
1694
error_t ret_errno = 0;
1695
int ret, ret_setflags;
1696
1809
struct ifreq network;
1697
1810
unsigned int if_index = if_nametoindex(interface);
1698
1811
if(if_index == 0){
1701
1814
return ENXIO;
1702
1815
}
1703
1816
if(interface_is_up(interface)){
1817
error_t ret_errno = 0, ioctl_errno = 0;
1704
1818
if(not get_flags(interface, &network) and debug){
1705
1819
ret_errno = errno;
1706
1820
fprintf_plus(stderr, "Failed to get flags for interface "
1707
1821
"\"%s\"\n", interface);
1822
errno = old_errno;
1708
1823
return ret_errno;
1709
1824
}
1710
1825
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1711
1826
1712
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1713
if(sd < 0){
1827
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1828
if(sd == -1){
1714
1829
ret_errno = errno;
1715
1830
perror_plus("socket");
1716
1831
errno = old_errno;
1722
1837
interface);
1723
1838
}
1724
1839
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();
1840
/* Raise privileges */
1841
ret_errno = raise_privileges();
1842
if(ret_errno != 0){
1843
errno = ret_errno;
1844
perror_plus("Failed to raise privileges");
1845
}
1846
1847
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1848
ioctl_errno = errno;
1849
1850
/* If raise_privileges() succeeded above */
1851
if(ret_errno == 0){
1852
/* Lower privileges */
1853
ret_errno = lower_privileges();
1854
if(ret_errno != 0){
1855
errno = ret_errno;
1856
perror_plus("Failed to lower privileges");
1857
}
1858
}
1733
1859
1734
1860
/* Close the socket */
1735
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1861
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
1736
1862
if(ret == -1){
1737
1863
perror_plus("close");
1738
1864
}
1739
1865
1740
1866
if(ret_setflags == -1){
1741
errno = ret_errno;
1867
errno = ioctl_errno;
1742
1868
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1743
1869
errno = old_errno;
1744
return ret_errno;
1870
return ioctl_errno;
1745
1871
}
1746
1872
} else if(debug){
1747
1873
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
1755
1881
int main(int argc, char *argv[]){
1756
1882
mandos_context mc = { .server = NULL, .dh_bits = 1024,
1757
1883
.priority = "SECURE256:!CTYPE-X.509:"
1758
"+CTYPE-OPENPGP", .current_server = NULL };
1884
"+CTYPE-OPENPGP", .current_server = NULL,
1885
.interfaces = NULL, .interfaces_size = 0 };
1759
1886
AvahiSServiceBrowser *sb = NULL;
1760
1887
error_t ret_errno;
1761
1888
int ret;
1762
1889
intmax_t tmpmax;
1763
1890
char *tmp;
1764
1891
int exitcode = EXIT_SUCCESS;
1765
char *interfaces = NULL;
1766
size_t interfaces_size = 0;
1767
1892
char *interfaces_to_take_down = NULL;
1768
1893
size_t interfaces_to_take_down_size = 0;
1769
char tempdir[] = "/tmp/mandosXXXXXX";
1770
bool tempdir_created = false;
1894
char run_tempdir[] = "/run/tmp/mandosXXXXXX";
1895
char old_tempdir[] = "/tmp/mandosXXXXXX";
1896
char *tempdir = NULL;
1771
1897
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
1772
1898
const char *seckey = PATHDIR "/" SECKEY;
1773
1899
const char *pubkey = PATHDIR "/" PUBKEY;
1774
1900
char *interfaces_hooks = NULL;
1775
size_t interfaces_hooks_size = 0;
1776
1901
1777
1902
bool gnutls_initialized = false;
1778
1903
bool gpgme_initialized = false;
1869
1994
connect_to = arg;
1870
1995
break;
1871
1996
case 'i': /* --interface */
1872
ret_errno = argz_add_sep(&interfaces, &interfaces_size, arg,
1873
(int)',');
1997
ret_errno = argz_add_sep(&mc.interfaces, &mc.interfaces_size,
1998
arg, (int)',');
1874
1999
if(ret_errno != 0){
1875
2000
argp_error(state, "%s", strerror(ret_errno));
1876
2001
}
1956
2081
/* Work around Debian bug #633582:
1957
2082
<http://bugs.debian.org/633582> */
1958
2083
1959
/* Re-raise priviliges */
1960
if(raise_privileges() == 0){
2084
/* Re-raise privileges */
2085
ret_errno = raise_privileges();
2086
if(ret_errno != 0){
2087
errno = ret_errno;
2088
perror_plus("Failed to raise privileges");
2089
} else {
1961
2090
struct stat st;
1962
2091
1963
2092
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2003
2132
}
2004
2133
2005
2134
/* Lower privileges */
2006
errno = 0;
2007
ret = seteuid(uid);
2008
if(ret == -1){
2009
perror_plus("seteuid");
2135
ret_errno = lower_privileges();
2136
if(ret_errno != 0){
2137
errno = ret_errno;
2138
perror_plus("Failed to lower privileges");
2010
2139
}
2011
2140
}
2012
2141
}
2013
2142
2014
/* Remove empty interface names */
2143
/* Remove invalid interface names (except "none") */
2015
2144
{
2016
2145
char *interface = NULL;
2017
while((interface = argz_next(interfaces, interfaces_size,
2146
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2018
2147
interface))){
2019
if(if_nametoindex(interface) == 0){
2020
if(interface[0] != '\0' and strcmp(interface, "none") != 0){
2148
if(strcmp(interface, "none") != 0
2149
and if_nametoindex(interface) == 0){
2150
if(interface[0] != '\0'){
2021
2151
fprintf_plus(stderr, "Not using nonexisting interface"
2022
2152
" \"%s\"\n", interface);
2023
2153
}
2024
argz_delete(&interfaces, &interfaces_size, interface);
2154
argz_delete(&mc.interfaces, &mc.interfaces_size, interface);
2025
2155
interface = NULL;
2026
2156
}
2027
2157
}
2029
2159
2030
2160
/* Run network hooks */
2031
2161
{
2032
2033
if(interfaces != NULL){
2034
interfaces_hooks = malloc(interfaces_size);
2162
if(mc.interfaces != NULL){
2163
interfaces_hooks = malloc(mc.interfaces_size);
2035
2164
if(interfaces_hooks == NULL){
2036
2165
perror_plus("malloc");
2037
2166
goto end;
2038
2167
}
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
}
2168
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2169
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2170
}
2171
run_network_hooks("start", interfaces_hooks != NULL ?
2172
interfaces_hooks : "", delay);
2048
2173
}
2049
2174
2050
2175
if(not debug){
2127
2252
}
2128
2253
2129
2254
/* If no interfaces were specified, make a list */
2130
if(interfaces == NULL){
2131
struct dirent **direntries;
2255
if(mc.interfaces == NULL){
2256
struct dirent **direntries = NULL;
2132
2257
/* Look for any good interfaces */
2133
2258
ret = scandir(sys_class_net, &direntries, good_interface,
2134
2259
alphasort);
2135
2260
if(ret >= 1){
2136
2261
/* Add all found interfaces to interfaces list */
2137
2262
for(int i = 0; i < ret; ++i){
2138
ret_errno = argz_add(&interfaces, &interfaces_size,
2263
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2139
2264
direntries[i]->d_name);
2140
2265
if(ret_errno != 0){
2266
errno = ret_errno;
2141
2267
perror_plus("argz_add");
2142
2268
continue;
2143
2269
}
2148
2274
}
2149
2275
free(direntries);
2150
2276
} else {
2151
free(direntries);
2277
if(ret == 0){
2278
free(direntries);
2279
}
2152
2280
fprintf_plus(stderr, "Could not find a network interface\n");
2153
2281
exitcode = EXIT_FAILURE;
2154
2282
goto end;
2155
2283
}
2156
2284
}
2157
2285
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)){
2286
/* Bring up interfaces which are down, and remove any "none"s */
2287
{
2170
2288
char *interface = NULL;
2171
while((interface = argz_next(interfaces, interfaces_size,
2289
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2172
2290
interface))){
2291
/* If interface name is "none", stop bringing up interfaces.
2292
Also remove all instances of "none" from the list */
2293
if(strcmp(interface, "none") == 0){
2294
argz_delete(&mc.interfaces, &mc.interfaces_size,
2295
interface);
2296
interface = NULL;
2297
while((interface = argz_next(mc.interfaces,
2298
mc.interfaces_size, interface))){
2299
if(strcmp(interface, "none") == 0){
2300
argz_delete(&mc.interfaces, &mc.interfaces_size,
2301
interface);
2302
interface = NULL;
2303
}
2304
}
2305
break;
2306
}
2173
2307
bool interface_was_up = interface_is_up(interface);
2174
ret = bring_up_interface(interface, delay);
2308
errno = bring_up_interface(interface, delay);
2175
2309
if(not interface_was_up){
2176
if(ret != 0){
2177
errno = ret;
2310
if(errno != 0){
2178
2311
perror_plus("Failed to bring up interface");
2179
2312
} else {
2180
ret_errno = argz_add(&interfaces_to_take_down,
2181
&interfaces_to_take_down_size,
2182
interface);
2313
errno = argz_add(&interfaces_to_take_down,
2314
&interfaces_to_take_down_size,
2315
interface);
2316
if(errno != 0){
2317
perror_plus("argz_add");
2318
}
2183
2319
}
2184
2320
}
2185
2321
}
2186
free(interfaces);
2187
interfaces = NULL;
2188
interfaces_size = 0;
2189
2322
if(debug and (interfaces_to_take_down == NULL)){
2190
2323
fprintf_plus(stderr, "No interfaces were brought up\n");
2191
2324
}
2192
2325
}
2193
2326
2327
/* If we only got one interface, explicitly use only that one */
2328
if(argz_count(mc.interfaces, mc.interfaces_size) == 1){
2329
if(debug){
2330
fprintf_plus(stderr, "Using only interface \"%s\"\n",
2331
mc.interfaces);
2332
}
2333
if_index = (AvahiIfIndex)if_nametoindex(mc.interfaces);
2334
}
2335
2194
2336
if(quit_now){
2195
2337
goto end;
2196
2338
}
2208
2350
goto end;
2209
2351
}
2210
2352
2211
if(mkdtemp(tempdir) == NULL){
2353
/* Try /run/tmp before /tmp */
2354
tempdir = mkdtemp(run_tempdir);
2355
if(tempdir == NULL and errno == ENOENT){
2356
if(debug){
2357
fprintf_plus(stderr, "Tempdir %s did not work, trying %s\n",
2358
run_tempdir, old_tempdir);
2359
}
2360
tempdir = mkdtemp(old_tempdir);
2361
}
2362
if(tempdir == NULL){
2212
2363
perror_plus("mkdtemp");
2213
2364
goto end;
2214
2365
}
2215
tempdir_created = true;
2216
2366
2217
2367
if(quit_now){
2218
2368
goto end;
2254
2404
exitcode = EX_USAGE;
2255
2405
goto end;
2256
2406
}
2257
2407
2258
2408
if(quit_now){
2259
2409
goto end;
2260
2410
}
2290
2440
fprintf_plus(stderr, "Retrying in %d seconds\n",
2291
2441
(int)retry_interval);
2292
2442
}
2293
sleep((int)retry_interval);
2443
sleep((unsigned int)retry_interval);
2294
2444
}
2295
2445
2296
if (not quit_now){
2446
if(not quit_now){
2297
2447
exitcode = EXIT_SUCCESS;
2298
2448
}
2299
2449
2354
2504
if(debug){
2355
2505
fprintf_plus(stderr, "Starting Avahi loop search\n");
2356
2506
}
2357
2507
2358
2508
ret = avahi_loop_with_timeout(simple_poll,
2359
2509
(int)(retry_interval * 1000), &mc);
2360
2510
if(debug){
2369
2519
}
2370
2520
2371
2521
/* Cleanup things */
2522
free(mc.interfaces);
2523
2372
2524
if(sb != NULL)
2373
2525
avahi_s_service_browser_free(sb);
2374
2526
2399
2551
}
2400
2552
}
2401
2553
2402
/* Re-raise priviliges */
2554
/* Re-raise privileges */
2403
2555
{
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();
2556
ret_errno = raise_privileges();
2557
if(ret_errno != 0){
2558
errno = ret_errno;
2559
perror_plus("Failed to raise privileges");
2560
} else {
2561
2562
/* Run network hooks */
2563
run_network_hooks("stop", interfaces_hooks != NULL ?
2564
interfaces_hooks : "", delay);
2565
2566
/* Take down the network interfaces which were brought up */
2567
{
2568
char *interface = NULL;
2569
while((interface=argz_next(interfaces_to_take_down,
2570
interfaces_to_take_down_size,
2571
interface))){
2572
ret_errno = take_down_interface(interface);
2573
if(ret_errno != 0){
2574
errno = ret_errno;
2575
perror_plus("Failed to take down interface");
2576
}
2577
}
2578
if(debug and (interfaces_to_take_down == NULL)){
2579
fprintf_plus(stderr, "No interfaces needed to be taken"
2580
" down\n");
2581
}
2582
}
2583
}
2584
2585
ret_errno = lower_privileges_permanently();
2586
if(ret_errno != 0){
2587
errno = ret_errno;
2588
perror_plus("Failed to lower privileges permanently");
2589
}
2429
2590
}
2430
2591
2431
2592
free(interfaces_to_take_down);
2432
2593
free(interfaces_hooks);
2433
2594
2434
2595
/* Removes the GPGME temp directory and all files inside */
2435
if(tempdir_created){
2596
if(tempdir != NULL){
2436
2597
struct dirent **direntries = NULL;
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);
2598
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY |
2599
O_NOFOLLOW));
2600
if(tempdir_fd == -1){
2601
perror_plus("open");
2602
} else {
2603
#ifdef __GLIBC__
2604
#if __GLIBC_PREREQ(2, 15)
2605
int numentries = scandirat(tempdir_fd, ".", &direntries,
2606
notdotentries, alphasort);
2607
#else /* not __GLIBC_PREREQ(2, 15) */
2608
int numentries = scandir(tempdir, &direntries, notdotentries,
2609
alphasort);
2610
#endif /* not __GLIBC_PREREQ(2, 15) */
2611
#else /* not __GLIBC__ */
2612
int numentries = scandir(tempdir, &direntries, notdotentries,
2613
alphasort);
2614
#endif /* not __GLIBC__ */
2615
if(numentries >= 0){
2616
for(int i = 0; i < numentries; i++){
2617
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
2618
if(ret == -1){
2619
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
2620
" \"%s\", 0): %s\n", tempdir,
2621
direntries[i]->d_name, strerror(errno));
2622
}
2623
}
2624
2625
/* need to clean even if 0 because man page doesn't specify */
2626
free(direntries);
2627
if(numentries == -1){
2628
perror_plus("scandir");
2629
}
2630
ret = rmdir(tempdir);
2631
if(ret == -1 and errno != ENOENT){
2632
perror_plus("rmdir");
2633
}
2456
2634
}
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");
2635
TEMP_FAILURE_RETRY(close(tempdir_fd));
2467
2636
}
2468
2637
}
2469
2638
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0