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- Committer: Teddy Hogeborn
- Date: 2012-06-17 02:30:59 UTC
- Revision ID: teddy@recompile.se-20120617023059-em4nfnxg1tsn64xj
* plugins.d/mandos-client (start_mandos_communication): Bug fix; skip
non-specified
interfaces.
(main): Use lower_privileges() consistently. Bug fix: Don't remove
"none" from list of interfaces. Make --interface=none work
again by not bringing up interfaces specified after "none".
* plugins.d/mandos-client.xml (OPTIONS): Document new meaning of
specifying --interface=none
together with other
interface names,
non-specified
interfaces.
(main): Use lower_privileges() consistently. Bug fix: Don't remove
"none" from list of interfaces. Make --interface=none work
again by not bringing up interfaces specified after "none".
* plugins.d/mandos-client.xml (OPTIONS): Document new meaning of
specifying --interface=none
together with other
interface names,
- files removed:
- debian/upstream
- files modified:
- DBUS-API
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
185
180
perror(print_text);
186
181
}
187
182
188
__attribute__((format (gnu_printf, 2, 3), nonnull))
183
__attribute__((format (gnu_printf, 2, 3)))
189
184
int fprintf_plus(FILE *stream, const char *format, ...){
190
185
va_list ap;
191
186
va_start (ap, format);
192
187
193
188
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
194
189
program_invocation_short_name));
195
return (int)TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
190
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
196
191
}
197
192
198
193
/*
200
195
* bytes. "buffer_capacity" is how much is currently allocated,
201
196
* "buffer_length" is how much is already used.
202
197
*/
203
__attribute__((nonnull, warn_unused_result))
204
198
size_t incbuffer(char **buffer, size_t buffer_length,
205
199
size_t buffer_capacity){
206
200
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;
201
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
202
if(buffer == NULL){
213
203
return 0;
214
204
}
215
*buffer = new_buf;
216
205
buffer_capacity += BUFFER_SIZE;
217
206
}
218
207
return buffer_capacity;
219
208
}
220
209
221
210
/* Add server to set of servers to retry periodically */
222
__attribute__((nonnull, warn_unused_result))
223
211
bool add_server(const char *ip, in_port_t port, AvahiIfIndex if_index,
224
212
int af, server **current_server){
225
213
int ret;
234
222
.af = af };
235
223
if(new_server->ip == NULL){
236
224
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
225
return false;
253
226
}
254
227
/* Special case of first server */
256
229
new_server->next = new_server;
257
230
new_server->prev = new_server;
258
231
*current_server = new_server;
232
/* Place the new server last in the list */
259
233
} else {
260
/* Place the new server last in the list */
261
234
new_server->next = *current_server;
262
235
new_server->prev = (*current_server)->prev;
263
236
new_server->prev->next = new_server;
264
237
(*current_server)->prev = new_server;
265
238
}
239
ret = clock_gettime(CLOCK_MONOTONIC, &(*current_server)->last_seen);
240
if(ret == -1){
241
perror_plus("clock_gettime");
242
return false;
243
}
266
244
return true;
267
245
}
268
246
269
247
/*
270
248
* Initialize GPGME.
271
249
*/
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){
250
static bool init_gpgme(const char *seckey, const char *pubkey,
251
const char *tempdir, mandos_context *mc){
277
252
gpgme_error_t rc;
278
253
gpgme_engine_info_t engine_info;
279
254
280
255
/*
281
256
* Helper function to insert pub and seckey to the engine keyring.
282
257
*/
283
bool import_key(const char * const filename){
258
bool import_key(const char *filename){
284
259
int ret;
285
260
int fd;
286
261
gpgme_data_t pgp_data;
367
342
* Decrypt OpenPGP data.
368
343
* Returns -1 on error
369
344
*/
370
__attribute__((nonnull, warn_unused_result))
371
345
static ssize_t pgp_packet_decrypt(const char *cryptotext,
372
346
size_t crypto_size,
373
347
char **plaintext,
493
467
return plaintext_length;
494
468
}
495
469
496
__attribute__((warn_unused_result, const))
497
static const char *safe_string(const char *str){
498
if(str == NULL)
499
return "(unknown)";
500
return str;
501
}
502
503
__attribute__((warn_unused_result))
504
static const char *safer_gnutls_strerror(int value){
470
static const char * safer_gnutls_strerror(int value){
505
471
const char *ret = gnutls_strerror(value);
506
return safe_string(ret);
472
if(ret == NULL)
473
ret = "(unknown)";
474
return ret;
507
475
}
508
476
509
477
/* GnuTLS log function callback */
510
__attribute__((nonnull))
511
478
static void debuggnutls(__attribute__((unused)) int level,
512
479
const char* string){
513
480
fprintf_plus(stderr, "GnuTLS: %s", string);
514
481
}
515
482
516
__attribute__((nonnull, warn_unused_result))
517
483
static int init_gnutls_global(const char *pubkeyfilename,
518
484
const char *seckeyfilename,
519
485
mandos_context *mc){
520
486
int ret;
521
unsigned int uret;
522
487
523
488
if(debug){
524
489
fprintf_plus(stderr, "Initializing GnuTLS\n");
575
540
safer_gnutls_strerror(ret));
576
541
goto globalfail;
577
542
}
578
if(mc->dh_bits == 0){
579
/* Find out the optimal number of DH bits */
580
/* Try to read the private key file */
581
gnutls_datum_t buffer = { .data = NULL, .size = 0 };
582
{
583
int secfile = open(seckeyfilename, O_RDONLY);
584
size_t buffer_capacity = 0;
585
while(true){
586
buffer_capacity = incbuffer((char **)&buffer.data,
587
(size_t)buffer.size,
588
(size_t)buffer_capacity);
589
if(buffer_capacity == 0){
590
perror_plus("incbuffer");
591
free(buffer.data);
592
buffer.data = NULL;
593
break;
594
}
595
ssize_t bytes_read = read(secfile, buffer.data + buffer.size,
596
BUFFER_SIZE);
597
/* EOF */
598
if(bytes_read == 0){
599
break;
600
}
601
/* check bytes_read for failure */
602
if(bytes_read < 0){
603
perror_plus("read");
604
free(buffer.data);
605
buffer.data = NULL;
606
break;
607
}
608
buffer.size += (unsigned int)bytes_read;
609
}
610
close(secfile);
611
}
612
/* If successful, use buffer to parse private key */
613
gnutls_sec_param_t sec_param = GNUTLS_SEC_PARAM_ULTRA;
614
if(buffer.data != NULL){
615
{
616
gnutls_openpgp_privkey_t privkey = NULL;
617
ret = gnutls_openpgp_privkey_init(&privkey);
618
if(ret != GNUTLS_E_SUCCESS){
619
fprintf_plus(stderr, "Error initializing OpenPGP key"
620
" structure: %s", safer_gnutls_strerror(ret));
621
free(buffer.data);
622
buffer.data = NULL;
623
} else {
624
ret = gnutls_openpgp_privkey_import(privkey, &buffer,
625
GNUTLS_OPENPGP_FMT_BASE64,
626
"", 0);
627
if(ret != GNUTLS_E_SUCCESS){
628
fprintf_plus(stderr, "Error importing OpenPGP key : %s",
629
safer_gnutls_strerror(ret));
630
privkey = NULL;
631
}
632
free(buffer.data);
633
buffer.data = NULL;
634
if(privkey != NULL){
635
/* Use private key to suggest an appropriate sec_param */
636
sec_param = gnutls_openpgp_privkey_sec_param(privkey);
637
gnutls_openpgp_privkey_deinit(privkey);
638
if(debug){
639
fprintf_plus(stderr, "This OpenPGP key implies using a"
640
" GnuTLS security parameter \"%s\".\n",
641
safe_string(gnutls_sec_param_get_name
642
(sec_param)));
643
}
644
}
645
}
646
}
647
if(sec_param == GNUTLS_SEC_PARAM_UNKNOWN){
648
/* Err on the side of caution */
649
sec_param = GNUTLS_SEC_PARAM_ULTRA;
650
if(debug){
651
fprintf_plus(stderr, "Falling back to security parameter"
652
" \"%s\"\n",
653
safe_string(gnutls_sec_param_get_name
654
(sec_param)));
655
}
656
}
657
}
658
uret = gnutls_sec_param_to_pk_bits(GNUTLS_PK_DH, sec_param);
659
if(uret != 0){
660
mc->dh_bits = uret;
661
if(debug){
662
fprintf_plus(stderr, "A \"%s\" GnuTLS security parameter"
663
" implies %u DH bits; using that.\n",
664
safe_string(gnutls_sec_param_get_name
665
(sec_param)),
666
mc->dh_bits);
667
}
668
} else {
669
fprintf_plus(stderr, "Failed to get implied number of DH"
670
" bits for security parameter \"%s\"): %s\n",
671
safe_string(gnutls_sec_param_get_name(sec_param)),
672
safer_gnutls_strerror(ret));
673
goto globalfail;
674
}
675
} else if(debug){
676
fprintf_plus(stderr, "DH bits explicitly set to %u\n",
677
mc->dh_bits);
678
}
679
543
ret = gnutls_dh_params_generate2(mc->dh_params, mc->dh_bits);
680
544
if(ret != GNUTLS_E_SUCCESS){
681
fprintf_plus(stderr, "Error in GnuTLS prime generation (%u bits):"
682
" %s\n", mc->dh_bits, safer_gnutls_strerror(ret));
545
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
546
safer_gnutls_strerror(ret));
683
547
goto globalfail;
684
548
}
685
549
695
559
return -1;
696
560
}
697
561
698
__attribute__((nonnull, warn_unused_result))
699
562
static int init_gnutls_session(gnutls_session_t *session,
700
563
mandos_context *mc){
701
564
int ret;
758
621
__attribute__((unused)) const char *txt){}
759
622
760
623
/* Called when a Mandos server is found */
761
__attribute__((nonnull, warn_unused_result))
762
624
static int start_mandos_communication(const char *ip, in_port_t port,
763
625
AvahiIfIndex if_index,
764
626
int af, mandos_context *mc){
765
627
int ret, tcp_sd = -1;
766
628
ssize_t sret;
767
struct sockaddr_storage to;
629
union {
630
struct sockaddr_in in;
631
struct sockaddr_in6 in6;
632
} to;
768
633
char *buffer = NULL;
769
634
char *decrypted_buffer = NULL;
770
635
size_t buffer_length = 0;
794
659
return -1;
795
660
}
796
661
797
/* If the interface is specified and we have a list of interfaces */
798
662
if(if_index != AVAHI_IF_UNSPEC and mc->interfaces != NULL){
799
663
/* Check if the interface is one of the interfaces we are using */
800
664
bool match = false;
809
673
}
810
674
}
811
675
if(not match){
812
/* This interface does not match any in the list, so we don't
813
connect to the server */
814
676
if(debug){
815
677
char interface[IF_NAMESIZE];
816
678
if(if_indextoname((unsigned int)if_index, interface) == NULL){
851
713
852
714
memset(&to, 0, sizeof(to));
853
715
if(af == AF_INET6){
854
((struct sockaddr_in6 *)&to)->sin6_family = (sa_family_t)af;
855
ret = inet_pton(af, ip, &((struct sockaddr_in6 *)&to)->sin6_addr);
716
to.in6.sin6_family = (sa_family_t)af;
717
ret = inet_pton(af, ip, &to.in6.sin6_addr);
856
718
} else { /* IPv4 */
857
((struct sockaddr_in *)&to)->sin_family = (sa_family_t)af;
858
ret = inet_pton(af, ip, &((struct sockaddr_in *)&to)->sin_addr);
719
to.in.sin_family = (sa_family_t)af;
720
ret = inet_pton(af, ip, &to.in.sin_addr);
859
721
}
860
722
if(ret < 0 ){
861
723
int e = errno;
870
732
goto mandos_end;
871
733
}
872
734
if(af == AF_INET6){
873
((struct sockaddr_in6 *)&to)->sin6_port = htons(port);
874
if(IN6_IS_ADDR_LINKLOCAL
875
(&((struct sockaddr_in6 *)&to)->sin6_addr)){
735
to.in6.sin6_port = htons(port);
736
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
737
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
738
-Wunreachable-code*/
876
739
if(if_index == AVAHI_IF_UNSPEC){
877
740
fprintf_plus(stderr, "An IPv6 link-local address is"
878
741
" incomplete without a network interface\n");
880
743
goto mandos_end;
881
744
}
882
745
/* Set the network interface number as scope */
883
((struct sockaddr_in6 *)&to)->sin6_scope_id = (uint32_t)if_index;
746
to.in6.sin6_scope_id = (uint32_t)if_index;
884
747
}
885
748
} else {
886
((struct sockaddr_in *)&to)->sin_port = htons(port);
749
to.in.sin_port = htons(port); /* Spurious warnings from
750
-Wconversion and
751
-Wunreachable-code */
887
752
}
888
753
889
754
if(quit_now){
906
771
}
907
772
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
908
773
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
774
const char *pcret;
909
775
if(af == AF_INET6){
910
ret = getnameinfo((struct sockaddr *)&to,
911
sizeof(struct sockaddr_in6),
912
addrstr, sizeof(addrstr), NULL, 0,
913
NI_NUMERICHOST);
776
pcret = inet_ntop(af, &(to.in6.sin6_addr), addrstr,
777
sizeof(addrstr));
914
778
} else {
915
ret = getnameinfo((struct sockaddr *)&to,
916
sizeof(struct sockaddr_in),
917
addrstr, sizeof(addrstr), NULL, 0,
918
NI_NUMERICHOST);
779
pcret = inet_ntop(af, &(to.in.sin_addr), addrstr,
780
sizeof(addrstr));
919
781
}
920
if(ret == EAI_SYSTEM){
921
perror_plus("getnameinfo");
922
} else if(ret != 0) {
923
fprintf_plus(stderr, "getnameinfo: %s", gai_strerror(ret));
924
} else if(strcmp(addrstr, ip) != 0){
925
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
782
if(pcret == NULL){
783
perror_plus("inet_ntop");
784
} else {
785
if(strcmp(addrstr, ip) != 0){
786
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
787
}
926
788
}
927
789
}
928
790
932
794
}
933
795
934
796
if(af == AF_INET6){
935
ret = connect(tcp_sd, (struct sockaddr *)&to,
936
sizeof(struct sockaddr_in6));
797
ret = connect(tcp_sd, &to.in6, sizeof(to));
937
798
} else {
938
ret = connect(tcp_sd, (struct sockaddr *)&to, /* IPv4 */
939
sizeof(struct sockaddr_in));
799
ret = connect(tcp_sd, &to.in, sizeof(to)); /* IPv4 */
940
800
}
941
801
if(ret < 0){
942
if((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
802
if ((errno != ECONNREFUSED and errno != ENETUNREACH) or debug){
943
803
int e = errno;
944
804
perror_plus("connect");
945
805
errno = e;
1160
1020
return retval;
1161
1021
}
1162
1022
1163
__attribute__((nonnull))
1164
1023
static void resolve_callback(AvahiSServiceResolver *r,
1165
1024
AvahiIfIndex interface,
1166
1025
AvahiProtocol proto,
1174
1033
AVAHI_GCC_UNUSED AvahiStringList *txt,
1175
1034
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1176
1035
flags,
1177
void *mc){
1036
void* mc){
1178
1037
if(r == NULL){
1179
1038
return;
1180
1039
}
1183
1042
timed out */
1184
1043
1185
1044
if(quit_now){
1186
avahi_s_service_resolver_free(r);
1187
1045
return;
1188
1046
}
1189
1047
1234
1092
const char *domain,
1235
1093
AVAHI_GCC_UNUSED AvahiLookupResultFlags
1236
1094
flags,
1237
void *mc){
1095
void* mc){
1238
1096
if(b == NULL){
1239
1097
return;
1240
1098
}
1300
1158
errno = old_errno;
1301
1159
}
1302
1160
1303
__attribute__((nonnull, warn_unused_result))
1304
1161
bool get_flags(const char *ifname, struct ifreq *ifr){
1305
1162
int ret;
1306
1163
error_t ret_errno;
1325
1182
return true;
1326
1183
}
1327
1184
1328
__attribute__((nonnull, warn_unused_result))
1329
1185
bool good_flags(const char *ifname, const struct ifreq *ifr){
1330
1186
1331
1187
/* Reject the loopback device */
1373
1229
* corresponds to an acceptable network device.
1374
1230
* (This function is passed to scandir(3) as a filter function.)
1375
1231
*/
1376
__attribute__((nonnull, warn_unused_result))
1377
1232
int good_interface(const struct dirent *if_entry){
1378
1233
if(if_entry->d_name[0] == '.'){
1379
1234
return 0;
1397
1252
/*
1398
1253
* This function determines if a network interface is up.
1399
1254
*/
1400
__attribute__((nonnull, warn_unused_result))
1401
1255
bool interface_is_up(const char *interface){
1402
1256
struct ifreq ifr;
1403
1257
if(not get_flags(interface, &ifr)){
1414
1268
/*
1415
1269
* This function determines if a network interface is running
1416
1270
*/
1417
__attribute__((nonnull, warn_unused_result))
1418
1271
bool interface_is_running(const char *interface){
1419
1272
struct ifreq ifr;
1420
1273
if(not get_flags(interface, &ifr)){
1428
1281
return (bool)(ifr.ifr_flags & IFF_RUNNING);
1429
1282
}
1430
1283
1431
__attribute__((nonnull, pure, warn_unused_result))
1432
1284
int notdotentries(const struct dirent *direntry){
1433
1285
/* Skip "." and ".." */
1434
1286
if(direntry->d_name[0] == '.'
1441
1293
}
1442
1294
1443
1295
/* Is this directory entry a runnable program? */
1444
__attribute__((nonnull, warn_unused_result))
1445
1296
int runnable_hook(const struct dirent *direntry){
1446
1297
int ret;
1447
1298
size_t sret;
1455
1306
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1456
1307
"abcdefghijklmnopqrstuvwxyz"
1457
1308
"0123456789"
1458
"_.-");
1309
"_-");
1459
1310
if((direntry->d_name)[sret] != '\0'){
1460
1311
/* Contains non-allowed characters */
1461
1312
if(debug){
1465
1316
return 0;
1466
1317
}
1467
1318
1468
ret = fstatat(hookdir_fd, direntry->d_name, &st, 0);
1319
char *fullname = NULL;
1320
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1321
if(ret < 0){
1322
perror_plus("asprintf");
1323
return 0;
1324
}
1325
1326
ret = stat(fullname, &st);
1469
1327
if(ret == -1){
1470
1328
if(debug){
1471
1329
perror_plus("Could not stat hook");
1495
1353
return 1;
1496
1354
}
1497
1355
1498
__attribute__((nonnull, warn_unused_result))
1499
1356
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval,
1500
1357
mandos_context *mc){
1501
1358
int ret;
1505
1362
1506
1363
while(true){
1507
1364
if(mc->current_server == NULL){
1508
if(debug){
1365
if (debug){
1509
1366
fprintf_plus(stderr, "Wait until first server is found."
1510
1367
" No timeout!\n");
1511
1368
}
1512
1369
ret = avahi_simple_poll_iterate(s, -1);
1513
1370
} else {
1514
if(debug){
1371
if (debug){
1515
1372
fprintf_plus(stderr, "Check current_server if we should run"
1516
1373
" it, or wait\n");
1517
1374
}
1534
1391
- ((intmax_t)waited_time.tv_sec * 1000))
1535
1392
- ((intmax_t)waited_time.tv_nsec / 1000000));
1536
1393
1537
if(debug){
1394
if (debug){
1538
1395
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1539
1396
block_time);
1540
1397
}
1562
1419
ret = avahi_simple_poll_iterate(s, (int)block_time);
1563
1420
}
1564
1421
if(ret != 0){
1565
if(ret > 0 or errno != EINTR){
1422
if (ret > 0 or errno != EINTR){
1566
1423
return (ret != 1) ? ret : 0;
1567
1424
}
1568
1425
}
1570
1427
}
1571
1428
1572
1429
/* Set effective uid to 0, return errno */
1573
__attribute__((warn_unused_result))
1574
1430
error_t raise_privileges(void){
1575
1431
error_t old_errno = errno;
1576
1432
error_t ret_errno = 0;
1577
1433
if(seteuid(0) == -1){
1578
1434
ret_errno = errno;
1435
perror_plus("seteuid");
1579
1436
}
1580
1437
errno = old_errno;
1581
1438
return ret_errno;
1582
1439
}
1583
1440
1584
1441
/* Set effective and real user ID to 0. Return errno. */
1585
__attribute__((warn_unused_result))
1586
1442
error_t raise_privileges_permanently(void){
1587
1443
error_t old_errno = errno;
1588
1444
error_t ret_errno = raise_privileges();
1592
1448
}
1593
1449
if(setuid(0) == -1){
1594
1450
ret_errno = errno;
1451
perror_plus("seteuid");
1595
1452
}
1596
1453
errno = old_errno;
1597
1454
return ret_errno;
1598
1455
}
1599
1456
1600
1457
/* Set effective user ID to unprivileged saved user ID */
1601
__attribute__((warn_unused_result))
1602
1458
error_t lower_privileges(void){
1603
1459
error_t old_errno = errno;
1604
1460
error_t ret_errno = 0;
1605
1461
if(seteuid(uid) == -1){
1606
1462
ret_errno = errno;
1463
perror_plus("seteuid");
1607
1464
}
1608
1465
errno = old_errno;
1609
1466
return ret_errno;
1610
1467
}
1611
1468
1612
1469
/* Lower privileges permanently */
1613
__attribute__((warn_unused_result))
1614
1470
error_t lower_privileges_permanently(void){
1615
1471
error_t old_errno = errno;
1616
1472
error_t ret_errno = 0;
1617
1473
if(setuid(uid) == -1){
1618
1474
ret_errno = errno;
1475
perror_plus("setuid");
1619
1476
}
1620
1477
errno = old_errno;
1621
1478
return ret_errno;
1622
1479
}
1623
1480
1624
__attribute__((nonnull))
1625
void run_network_hooks(const char *mode, const char *interface,
1481
bool run_network_hooks(const char *mode, const char *interface,
1626
1482
const float delay){
1627
struct dirent **direntries = NULL;
1628
if(hookdir_fd == -1){
1629
hookdir_fd = open(hookdir, O_RDONLY);
1630
if(hookdir_fd == -1){
1631
if(errno == ENOENT){
1632
if(debug){
1633
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1634
" found\n", hookdir);
1635
}
1636
} else {
1637
perror_plus("open");
1638
}
1639
return;
1640
}
1641
}
1642
#ifdef __GLIBC__
1643
#if __GLIBC_PREREQ(2, 15)
1644
int numhooks = scandirat(hookdir_fd, ".", &direntries,
1645
runnable_hook, alphasort);
1646
#else /* not __GLIBC_PREREQ(2, 15) */
1647
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1648
alphasort);
1649
#endif /* not __GLIBC_PREREQ(2, 15) */
1650
#else /* not __GLIBC__ */
1651
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1652
alphasort);
1653
#endif /* not __GLIBC__ */
1483
struct dirent **direntries;
1484
struct dirent *direntry;
1485
int ret;
1486
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1487
alphasort);
1654
1488
if(numhooks == -1){
1655
perror_plus("scandir");
1656
return;
1657
}
1658
struct dirent *direntry;
1659
int ret;
1660
int devnull = open("/dev/null", O_RDONLY);
1661
for(int i = 0; i < numhooks; i++){
1662
direntry = direntries[i];
1663
if(debug){
1664
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1665
direntry->d_name);
1489
if(errno == ENOENT){
1490
if(debug){
1491
fprintf_plus(stderr, "Network hook directory \"%s\" not"
1492
" found\n", hookdir);
1493
}
1494
} else {
1495
perror_plus("scandir");
1666
1496
}
1667
pid_t hook_pid = fork();
1668
if(hook_pid == 0){
1669
/* Child */
1670
/* Raise privileges */
1671
errno = raise_privileges_permanently();
1672
if(errno != 0){
1673
perror_plus("Failed to raise privileges");
1674
_exit(EX_NOPERM);
1675
}
1676
/* Set group */
1677
errno = 0;
1678
ret = setgid(0);
1679
if(ret == -1){
1680
perror_plus("setgid");
1681
_exit(EX_NOPERM);
1682
}
1683
/* Reset supplementary groups */
1684
errno = 0;
1685
ret = setgroups(0, NULL);
1686
if(ret == -1){
1687
perror_plus("setgroups");
1688
_exit(EX_NOPERM);
1689
}
1690
ret = dup2(devnull, STDIN_FILENO);
1691
if(ret == -1){
1692
perror_plus("dup2(devnull, STDIN_FILENO)");
1693
_exit(EX_OSERR);
1694
}
1695
ret = close(devnull);
1696
if(ret == -1){
1697
perror_plus("close");
1698
_exit(EX_OSERR);
1699
}
1700
ret = dup2(STDERR_FILENO, STDOUT_FILENO);
1701
if(ret == -1){
1702
perror_plus("dup2(STDERR_FILENO, STDOUT_FILENO)");
1703
_exit(EX_OSERR);
1704
}
1705
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1706
if(ret == -1){
1707
perror_plus("setenv");
1708
_exit(EX_OSERR);
1709
}
1710
ret = setenv("DEVICE", interface, 1);
1711
if(ret == -1){
1712
perror_plus("setenv");
1713
_exit(EX_OSERR);
1714
}
1715
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1716
if(ret == -1){
1717
perror_plus("setenv");
1718
_exit(EX_OSERR);
1719
}
1720
ret = setenv("MODE", mode, 1);
1721
if(ret == -1){
1722
perror_plus("setenv");
1723
_exit(EX_OSERR);
1724
}
1725
char *delaystring;
1726
ret = asprintf(&delaystring, "%f", (double)delay);
1727
if(ret == -1){
1497
} else {
1498
int devnull = open("/dev/null", O_RDONLY);
1499
for(int i = 0; i < numhooks; i++){
1500
direntry = direntries[i];
1501
char *fullname = NULL;
1502
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1503
if(ret < 0){
1728
1504
perror_plus("asprintf");
1729
_exit(EX_OSERR);
1730
}
1731
ret = setenv("DELAY", delaystring, 1);
1732
if(ret == -1){
1505
continue;
1506
}
1507
if(debug){
1508
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1509
direntry->d_name);
1510
}
1511
pid_t hook_pid = fork();
1512
if(hook_pid == 0){
1513
/* Child */
1514
/* Raise privileges */
1515
raise_privileges_permanently();
1516
/* Set group */
1517
errno = 0;
1518
ret = setgid(0);
1519
if(ret == -1){
1520
perror_plus("setgid");
1521
}
1522
/* Reset supplementary groups */
1523
errno = 0;
1524
ret = setgroups(0, NULL);
1525
if(ret == -1){
1526
perror_plus("setgroups");
1527
}
1528
dup2(devnull, STDIN_FILENO);
1529
close(devnull);
1530
dup2(STDERR_FILENO, STDOUT_FILENO);
1531
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1532
if(ret == -1){
1533
perror_plus("setenv");
1534
_exit(EX_OSERR);
1535
}
1536
ret = setenv("DEVICE", interface, 1);
1537
if(ret == -1){
1538
perror_plus("setenv");
1539
_exit(EX_OSERR);
1540
}
1541
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1542
if(ret == -1){
1543
perror_plus("setenv");
1544
_exit(EX_OSERR);
1545
}
1546
ret = setenv("MODE", mode, 1);
1547
if(ret == -1){
1548
perror_plus("setenv");
1549
_exit(EX_OSERR);
1550
}
1551
char *delaystring;
1552
ret = asprintf(&delaystring, "%f", delay);
1553
if(ret == -1){
1554
perror_plus("asprintf");
1555
_exit(EX_OSERR);
1556
}
1557
ret = setenv("DELAY", delaystring, 1);
1558
if(ret == -1){
1559
free(delaystring);
1560
perror_plus("setenv");
1561
_exit(EX_OSERR);
1562
}
1733
1563
free(delaystring);
1734
perror_plus("setenv");
1735
_exit(EX_OSERR);
1736
}
1737
free(delaystring);
1738
if(connect_to != NULL){
1739
ret = setenv("CONNECT", connect_to, 1);
1740
if(ret == -1){
1741
perror_plus("setenv");
1742
_exit(EX_OSERR);
1743
}
1744
}
1745
int hook_fd = openat(hookdir_fd, direntry->d_name, O_RDONLY);
1746
if(hook_fd == -1){
1747
perror_plus("openat");
1748
_exit(EXIT_FAILURE);
1749
}
1750
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1751
perror_plus("close");
1752
_exit(EXIT_FAILURE);
1753
}
1754
if(fexecve(hook_fd, (char *const []){ direntry->d_name, NULL },
1755
environ) == -1){
1756
perror_plus("fexecve");
1757
_exit(EXIT_FAILURE);
1758
}
1759
} else {
1760
if(hook_pid == -1){
1761
perror_plus("fork");
1762
free(direntry);
1763
continue;
1764
}
1765
int status;
1766
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1767
perror_plus("waitpid");
1768
free(direntry);
1769
continue;
1770
}
1771
if(WIFEXITED(status)){
1772
if(WEXITSTATUS(status) != 0){
1773
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1774
" with status %d\n", direntry->d_name,
1775
WEXITSTATUS(status));
1776
free(direntry);
1777
continue;
1778
}
1779
} else if(WIFSIGNALED(status)){
1780
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1781
" signal %d\n", direntry->d_name,
1782
WTERMSIG(status));
1783
free(direntry);
1784
continue;
1564
if(connect_to != NULL){
1565
ret = setenv("CONNECT", connect_to, 1);
1566
if(ret == -1){
1567
perror_plus("setenv");
1568
_exit(EX_OSERR);
1569
}
1570
}
1571
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1572
perror_plus("execl");
1573
_exit(EXIT_FAILURE);
1574
}
1785
1575
} else {
1786
fprintf_plus(stderr, "Warning: network hook \"%s\""
1787
" crashed\n", direntry->d_name);
1788
free(direntry);
1789
continue;
1790
}
1791
}
1792
if(debug){
1793
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1794
direntry->d_name);
1795
}
1796
free(direntry);
1797
}
1798
free(direntries);
1799
if((int)TEMP_FAILURE_RETRY(close(hookdir_fd)) == -1){
1800
perror_plus("close");
1801
} else {
1802
hookdir_fd = -1;
1803
}
1804
close(devnull);
1576
int status;
1577
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1578
perror_plus("waitpid");
1579
free(fullname);
1580
continue;
1581
}
1582
if(WIFEXITED(status)){
1583
if(WEXITSTATUS(status) != 0){
1584
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1585
" with status %d\n", direntry->d_name,
1586
WEXITSTATUS(status));
1587
free(fullname);
1588
continue;
1589
}
1590
} else if(WIFSIGNALED(status)){
1591
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1592
" signal %d\n", direntry->d_name,
1593
WTERMSIG(status));
1594
free(fullname);
1595
continue;
1596
} else {
1597
fprintf_plus(stderr, "Warning: network hook \"%s\""
1598
" crashed\n", direntry->d_name);
1599
free(fullname);
1600
continue;
1601
}
1602
}
1603
free(fullname);
1604
if(debug){
1605
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1606
direntry->d_name);
1607
}
1608
}
1609
close(devnull);
1610
}
1611
return true;
1805
1612
}
1806
1613
1807
__attribute__((nonnull, warn_unused_result))
1808
1614
error_t bring_up_interface(const char *const interface,
1809
1615
const float delay){
1616
int sd = -1;
1810
1617
error_t old_errno = errno;
1811
int ret;
1618
error_t ret_errno = 0;
1619
int ret, ret_setflags;
1812
1620
struct ifreq network;
1813
1621
unsigned int if_index = if_nametoindex(interface);
1814
1622
if(if_index == 0){
1823
1631
}
1824
1632
1825
1633
if(not interface_is_up(interface)){
1826
error_t ret_errno = 0, ioctl_errno = 0;
1827
if(not get_flags(interface, &network)){
1634
if(not get_flags(interface, &network) and debug){
1828
1635
ret_errno = errno;
1829
1636
fprintf_plus(stderr, "Failed to get flags for interface "
1830
1637
"\"%s\"\n", interface);
1831
errno = old_errno;
1832
1638
return ret_errno;
1833
1639
}
1834
network.ifr_flags |= IFF_UP; /* set flag */
1640
network.ifr_flags |= IFF_UP;
1835
1641
1836
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1837
if(sd == -1){
1642
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1643
if(sd < 0){
1838
1644
ret_errno = errno;
1839
1645
perror_plus("socket");
1840
1646
errno = old_errno;
1841
1647
return ret_errno;
1842
1648
}
1843
1649
1844
1650
if(quit_now){
1845
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1846
if(ret == -1){
1847
perror_plus("close");
1848
}
1651
close(sd);
1849
1652
errno = old_errno;
1850
1653
return EINTR;
1851
1654
}
1855
1658
interface);
1856
1659
}
1857
1660
1858
/* Raise privileges */
1859
ret_errno = raise_privileges();
1860
if(ret_errno != 0){
1861
errno = ret_errno;
1862
perror_plus("Failed to raise privileges");
1863
}
1661
/* Raise priviliges */
1662
raise_privileges();
1864
1663
1865
1664
#ifdef __linux__
1866
int ret_linux;
1867
bool restore_loglevel = false;
1868
if(ret_errno == 0){
1869
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1870
messages about the network interface to mess up the prompt */
1871
ret_linux = klogctl(8, NULL, 5);
1872
if(ret_linux == -1){
1873
perror_plus("klogctl");
1874
} else {
1875
restore_loglevel = true;
1876
}
1665
/* Lower kernel loglevel to KERN_NOTICE to avoid KERN_INFO
1666
messages about the network interface to mess up the prompt */
1667
int ret_linux = klogctl(8, NULL, 5);
1668
bool restore_loglevel = true;
1669
if(ret_linux == -1){
1670
restore_loglevel = false;
1671
perror_plus("klogctl");
1877
1672
}
1878
1673
#endif /* __linux__ */
1879
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1880
ioctl_errno = errno;
1674
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1675
ret_errno = errno;
1881
1676
#ifdef __linux__
1882
1677
if(restore_loglevel){
1883
1678
ret_linux = klogctl(7, NULL, 0);
1887
1682
}
1888
1683
#endif /* __linux__ */
1889
1684
1890
/* If raise_privileges() succeeded above */
1891
if(ret_errno == 0){
1892
/* Lower privileges */
1893
ret_errno = lower_privileges();
1894
if(ret_errno != 0){
1895
errno = ret_errno;
1896
perror_plus("Failed to lower privileges");
1897
}
1898
}
1685
/* Lower privileges */
1686
lower_privileges();
1899
1687
1900
1688
/* Close the socket */
1901
1689
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1904
1692
}
1905
1693
1906
1694
if(ret_setflags == -1){
1907
errno = ioctl_errno;
1695
errno = ret_errno;
1908
1696
perror_plus("ioctl SIOCSIFFLAGS +IFF_UP");
1909
1697
errno = old_errno;
1910
return ioctl_errno;
1698
return ret_errno;
1911
1699
}
1912
1700
} else if(debug){
1913
1701
fprintf_plus(stderr, "Interface \"%s\" is already up; good\n",
1931
1719
return 0;
1932
1720
}
1933
1721
1934
__attribute__((nonnull, warn_unused_result))
1935
1722
error_t take_down_interface(const char *const interface){
1723
int sd = -1;
1936
1724
error_t old_errno = errno;
1725
error_t ret_errno = 0;
1726
int ret, ret_setflags;
1937
1727
struct ifreq network;
1938
1728
unsigned int if_index = if_nametoindex(interface);
1939
1729
if(if_index == 0){
1942
1732
return ENXIO;
1943
1733
}
1944
1734
if(interface_is_up(interface)){
1945
error_t ret_errno = 0, ioctl_errno = 0;
1946
1735
if(not get_flags(interface, &network) and debug){
1947
1736
ret_errno = errno;
1948
1737
fprintf_plus(stderr, "Failed to get flags for interface "
1949
1738
"\"%s\"\n", interface);
1950
errno = old_errno;
1951
1739
return ret_errno;
1952
1740
}
1953
1741
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1954
1742
1955
int sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1956
if(sd == -1){
1743
sd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1744
if(sd < 0){
1957
1745
ret_errno = errno;
1958
1746
perror_plus("socket");
1959
1747
errno = old_errno;
1965
1753
interface);
1966
1754
}
1967
1755
1968
/* Raise privileges */
1969
ret_errno = raise_privileges();
1970
if(ret_errno != 0){
1971
errno = ret_errno;
1972
perror_plus("Failed to raise privileges");
1973
}
1974
1975
int ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1976
ioctl_errno = errno;
1977
1978
/* If raise_privileges() succeeded above */
1979
if(ret_errno == 0){
1980
/* Lower privileges */
1981
ret_errno = lower_privileges();
1982
if(ret_errno != 0){
1983
errno = ret_errno;
1984
perror_plus("Failed to lower privileges");
1985
}
1986
}
1756
/* Raise priviliges */
1757
raise_privileges();
1758
1759
ret_setflags = ioctl(sd, SIOCSIFFLAGS, &network);
1760
ret_errno = errno;
1761
1762
/* Lower privileges */
1763
lower_privileges();
1987
1764
1988
1765
/* Close the socket */
1989
int ret = (int)TEMP_FAILURE_RETRY(close(sd));
1766
ret = (int)TEMP_FAILURE_RETRY(close(sd));
1990
1767
if(ret == -1){
1991
1768
perror_plus("close");
1992
1769
}
1993
1770
1994
1771
if(ret_setflags == -1){
1995
errno = ioctl_errno;
1772
errno = ret_errno;
1996
1773
perror_plus("ioctl SIOCSIFFLAGS -IFF_UP");
1997
1774
errno = old_errno;
1998
return ioctl_errno;
1775
return ret_errno;
1999
1776
}
2000
1777
} else if(debug){
2001
1778
fprintf_plus(stderr, "Interface \"%s\" is already down; odd\n",
2007
1784
}
2008
1785
2009
1786
int main(int argc, char *argv[]){
2010
mandos_context mc = { .server = NULL, .dh_bits = 0,
1787
mandos_context mc = { .server = NULL, .dh_bits = 1024,
2011
1788
.priority = "SECURE256:!CTYPE-X.509:"
2012
"+CTYPE-OPENPGP:!RSA", .current_server = NULL,
1789
"+CTYPE-OPENPGP", .current_server = NULL,
2013
1790
.interfaces = NULL, .interfaces_size = 0 };
2014
1791
AvahiSServiceBrowser *sb = NULL;
2015
1792
error_t ret_errno;
2019
1796
int exitcode = EXIT_SUCCESS;
2020
1797
char *interfaces_to_take_down = NULL;
2021
1798
size_t interfaces_to_take_down_size = 0;
2022
char run_tempdir[] = "/run/tmp/mandosXXXXXX";
2023
char old_tempdir[] = "/tmp/mandosXXXXXX";
2024
char *tempdir = NULL;
1799
char tempdir[] = "/tmp/mandosXXXXXX";
1800
bool tempdir_created = false;
2025
1801
AvahiIfIndex if_index = AVAHI_IF_UNSPEC;
2026
1802
const char *seckey = PATHDIR "/" SECKEY;
2027
1803
const char *pubkey = PATHDIR "/" PUBKEY;
2028
1804
char *interfaces_hooks = NULL;
1805
size_t interfaces_hooks_size = 0;
2029
1806
2030
1807
bool gnutls_initialized = false;
2031
1808
bool gpgme_initialized = false;
2209
1986
/* Work around Debian bug #633582:
2210
1987
<http://bugs.debian.org/633582> */
2211
1988
2212
/* Re-raise privileges */
2213
ret_errno = raise_privileges();
2214
if(ret_errno != 0){
2215
errno = ret_errno;
2216
perror_plus("Failed to raise privileges");
2217
} else {
1989
/* Re-raise priviliges */
1990
if(raise_privileges() == 0){
2218
1991
struct stat st;
2219
1992
2220
1993
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
2260
2033
}
2261
2034
2262
2035
/* Lower privileges */
2263
ret_errno = lower_privileges();
2264
if(ret_errno != 0){
2265
errno = ret_errno;
2266
perror_plus("Failed to lower privileges");
2267
}
2036
lower_privileges();
2268
2037
}
2269
2038
}
2270
2039
2294
2063
goto end;
2295
2064
}
2296
2065
memcpy(interfaces_hooks, mc.interfaces, mc.interfaces_size);
2297
argz_stringify(interfaces_hooks, mc.interfaces_size, (int)',');
2298
}
2299
run_network_hooks("start", interfaces_hooks != NULL ?
2300
interfaces_hooks : "", delay);
2066
interfaces_hooks_size = mc.interfaces_size;
2067
argz_stringify(interfaces_hooks, interfaces_hooks_size,
2068
(int)',');
2069
}
2070
if(not run_network_hooks("start", interfaces_hooks != NULL ?
2071
interfaces_hooks : "", delay)){
2072
goto end;
2073
}
2301
2074
}
2302
2075
2303
2076
if(not debug){
2381
2154
2382
2155
/* If no interfaces were specified, make a list */
2383
2156
if(mc.interfaces == NULL){
2384
struct dirent **direntries = NULL;
2157
struct dirent **direntries;
2385
2158
/* Look for any good interfaces */
2386
2159
ret = scandir(sys_class_net, &direntries, good_interface,
2387
2160
alphasort);
2391
2164
ret_errno = argz_add(&mc.interfaces, &mc.interfaces_size,
2392
2165
direntries[i]->d_name);
2393
2166
if(ret_errno != 0){
2394
errno = ret_errno;
2395
2167
perror_plus("argz_add");
2396
free(direntries[i]);
2397
2168
continue;
2398
2169
}
2399
2170
if(debug){
2400
2171
fprintf_plus(stderr, "Will use interface \"%s\"\n",
2401
2172
direntries[i]->d_name);
2402
2173
}
2403
free(direntries[i]);
2404
2174
}
2405
2175
free(direntries);
2406
2176
} else {
2407
if(ret == 0){
2408
free(direntries);
2409
}
2177
free(direntries);
2410
2178
fprintf_plus(stderr, "Could not find a network interface\n");
2411
2179
exitcode = EXIT_FAILURE;
2412
2180
goto end;
2413
2181
}
2414
2182
}
2415
2183
2416
/* Bring up interfaces which are down, and remove any "none"s */
2184
/* Bring up interfaces which are down */
2417
2185
{
2418
2186
char *interface = NULL;
2419
2187
while((interface = argz_next(mc.interfaces, mc.interfaces_size,
2435
2203
break;
2436
2204
}
2437
2205
bool interface_was_up = interface_is_up(interface);
2438
errno = bring_up_interface(interface, delay);
2206
ret = bring_up_interface(interface, delay);
2439
2207
if(not interface_was_up){
2440
if(errno != 0){
2208
if(ret != 0){
2209
errno = ret;
2441
2210
perror_plus("Failed to bring up interface");
2442
2211
} else {
2443
errno = argz_add(&interfaces_to_take_down,
2444
&interfaces_to_take_down_size,
2445
interface);
2446
if(errno != 0){
2447
perror_plus("argz_add");
2448
}
2212
ret_errno = argz_add(&interfaces_to_take_down,
2213
&interfaces_to_take_down_size,
2214
interface);
2449
2215
}
2450
2216
}
2451
2217
}
2480
2246
goto end;
2481
2247
}
2482
2248
2483
/* Try /run/tmp before /tmp */
2484
tempdir = mkdtemp(run_tempdir);
2485
if(tempdir == NULL and errno == ENOENT){
2486
if(debug){
2487
fprintf_plus(stderr, "Tempdir %s did not work, trying %s\n",
2488
run_tempdir, old_tempdir);
2489
}
2490
tempdir = mkdtemp(old_tempdir);
2491
}
2492
if(tempdir == NULL){
2249
if(mkdtemp(tempdir) == NULL){
2493
2250
perror_plus("mkdtemp");
2494
2251
goto end;
2495
2252
}
2253
tempdir_created = true;
2496
2254
2497
2255
if(quit_now){
2498
2256
goto end;
2570
2328
fprintf_plus(stderr, "Retrying in %d seconds\n",
2571
2329
(int)retry_interval);
2572
2330
}
2573
sleep((unsigned int)retry_interval);
2331
sleep((int)retry_interval);
2574
2332
}
2575
2333
2576
if(not quit_now){
2334
if (not quit_now){
2577
2335
exitcode = EXIT_SUCCESS;
2578
2336
}
2579
2337
2634
2392
if(debug){
2635
2393
fprintf_plus(stderr, "Starting Avahi loop search\n");
2636
2394
}
2637
2395
2638
2396
ret = avahi_loop_with_timeout(simple_poll,
2639
2397
(int)(retry_interval * 1000), &mc);
2640
2398
if(debug){
2676
2434
mc.current_server->prev->next = NULL;
2677
2435
while(mc.current_server != NULL){
2678
2436
server *next = mc.current_server->next;
2679
#ifdef __GNUC__
2680
#pragma GCC diagnostic push
2681
#pragma GCC diagnostic ignored "-Wcast-qual"
2682
#endif
2683
free((char *)(mc.current_server->ip));
2684
#ifdef __GNUC__
2685
#pragma GCC diagnostic pop
2686
#endif
2687
2437
free(mc.current_server);
2688
2438
mc.current_server = next;
2689
2439
}
2690
2440
}
2691
2441
2692
/* Re-raise privileges */
2442
/* Re-raise priviliges */
2693
2443
{
2694
ret_errno = raise_privileges();
2695
if(ret_errno != 0){
2696
errno = ret_errno;
2697
perror_plus("Failed to raise privileges");
2698
} else {
2699
2700
/* Run network hooks */
2701
run_network_hooks("stop", interfaces_hooks != NULL ?
2702
interfaces_hooks : "", delay);
2703
2704
/* Take down the network interfaces which were brought up */
2705
{
2706
char *interface = NULL;
2707
while((interface=argz_next(interfaces_to_take_down,
2708
interfaces_to_take_down_size,
2709
interface))){
2710
ret_errno = take_down_interface(interface);
2711
if(ret_errno != 0){
2712
errno = ret_errno;
2713
perror_plus("Failed to take down interface");
2714
}
2715
}
2716
if(debug and (interfaces_to_take_down == NULL)){
2717
fprintf_plus(stderr, "No interfaces needed to be taken"
2718
" down\n");
2719
}
2720
}
2721
}
2722
2723
ret_errno = lower_privileges_permanently();
2724
if(ret_errno != 0){
2725
errno = ret_errno;
2726
perror_plus("Failed to lower privileges permanently");
2727
}
2444
raise_privileges();
2445
2446
/* Run network hooks */
2447
run_network_hooks("stop", interfaces_hooks != NULL ?
2448
interfaces_hooks : "", delay);
2449
2450
/* Take down the network interfaces which were brought up */
2451
{
2452
char *interface = NULL;
2453
while((interface=argz_next(interfaces_to_take_down,
2454
interfaces_to_take_down_size,
2455
interface))){
2456
ret_errno = take_down_interface(interface);
2457
if(ret_errno != 0){
2458
errno = ret_errno;
2459
perror_plus("Failed to take down interface");
2460
}
2461
}
2462
if(debug and (interfaces_to_take_down == NULL)){
2463
fprintf_plus(stderr, "No interfaces needed to be taken"
2464
" down\n");
2465
}
2466
}
2467
2468
lower_privileges_permanently();
2728
2469
}
2729
2470
2730
2471
free(interfaces_to_take_down);
2731
2472
free(interfaces_hooks);
2732
2473
2733
2474
/* Removes the GPGME temp directory and all files inside */
2734
if(tempdir != NULL){
2475
if(tempdir_created){
2735
2476
struct dirent **direntries = NULL;
2736
int tempdir_fd = (int)TEMP_FAILURE_RETRY(open(tempdir, O_RDONLY |
2737
O_NOFOLLOW));
2738
if(tempdir_fd == -1){
2739
perror_plus("open");
2740
} else {
2741
#ifdef __GLIBC__
2742
#if __GLIBC_PREREQ(2, 15)
2743
int numentries = scandirat(tempdir_fd, ".", &direntries,
2744
notdotentries, alphasort);
2745
#else /* not __GLIBC_PREREQ(2, 15) */
2746
int numentries = scandir(tempdir, &direntries, notdotentries,
2747
alphasort);
2748
#endif /* not __GLIBC_PREREQ(2, 15) */
2749
#else /* not __GLIBC__ */
2750
int numentries = scandir(tempdir, &direntries, notdotentries,
2751
alphasort);
2752
#endif /* not __GLIBC__ */
2753
if(numentries >= 0){
2754
for(int i = 0; i < numentries; i++){
2755
ret = unlinkat(tempdir_fd, direntries[i]->d_name, 0);
2756
if(ret == -1){
2757
fprintf_plus(stderr, "unlinkat(open(\"%s\", O_RDONLY),"
2758
" \"%s\", 0): %s\n", tempdir,
2759
direntries[i]->d_name, strerror(errno));
2760
}
2761
free(direntries[i]);
2762
}
2763
2764
/* need to clean even if 0 because man page doesn't specify */
2765
free(direntries);
2766
if(numentries == -1){
2767
perror_plus("scandir");
2768
}
2769
ret = rmdir(tempdir);
2770
if(ret == -1 and errno != ENOENT){
2771
perror_plus("rmdir");
2772
}
2477
struct dirent *direntry = NULL;
2478
int numentries = scandir(tempdir, &direntries, notdotentries,
2479
alphasort);
2480
if (numentries > 0){
2481
for(int i = 0; i < numentries; i++){
2482
direntry = direntries[i];
2483
char *fullname = NULL;
2484
ret = asprintf(&fullname, "%s/%s", tempdir,
2485
direntry->d_name);
2486
if(ret < 0){
2487
perror_plus("asprintf");
2488
continue;
2489
}
2490
ret = remove(fullname);
2491
if(ret == -1){
2492
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2493
strerror(errno));
2494
}
2495
free(fullname);
2773
2496
}
2774
TEMP_FAILURE_RETRY(close(tempdir_fd));
2497
}
2498
2499
/* need to clean even if 0 because man page doesn't specify */
2500
free(direntries);
2501
if (numentries == -1){
2502
perror_plus("scandir");
2503
}
2504
ret = rmdir(tempdir);
2505
if(ret == -1 and errno != ENOENT){
2506
perror_plus("rmdir");
2775
2507
}
2776
2508
}
2777
2509
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0