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- Committer: Teddy Hogeborn
- Date: 2011-10-11 19:36:00 UTC
- mto: (505.2.5 mandos-client-network-hooks)
- mto: This revision was merged to the branch mainline in revision 516.
- Revision ID: teddy@recompile.se-20111011193600-wnxw60g1tq4u8f15
* Makefile (DOCBOOKTOMAN): Also check manual pages for warnings.
* debian/control (Build-Depends): Added "man".
* debian/control (Build-Depends): Added "man".
added
removed
plugins.d/mandos-client.c
53
53
sockaddr_in6, PF_INET6,
54
54
SOCK_STREAM, uid_t, gid_t, open(),
55
55
opendir(), DIR */
56
#include <sys/stat.h> /* open(), S_ISREG */
56
#include <sys/stat.h> /* open() */
57
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
58
inet_pton(), connect() */
59
59
#include <fcntl.h> /* open() */
85
85
raise() */
86
86
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
87
87
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
88
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
89
WEXITSTATUS(), WTERMSIG() */
90
88
91
89
#ifdef __linux__
92
90
#include <sys/klog.h> /* klogctl() */
110
108
init_gnutls_session(),
111
109
GNUTLS_* */
112
110
#include <gnutls/openpgp.h>
113
/* gnutls_certificate_set_openpgp_key_file(),
114
GNUTLS_OPENPGP_FMT_BASE64 */
111
/* gnutls_certificate_set_openpgp_key_file(),
112
GNUTLS_OPENPGP_FMT_BASE64 */
115
113
116
114
/* GPGME */
117
115
#include <gpgme.h> /* All GPGME types, constants and
125
123
#define PATHDIR "/conf/conf.d/mandos"
126
124
#define SECKEY "seckey.txt"
127
125
#define PUBKEY "pubkey.txt"
128
#define HOOKDIR "/lib/mandos/network-hooks.d"
129
126
130
127
bool debug = false;
131
128
static const char mandos_protocol_version[] = "1";
133
130
const char *argp_program_bug_address = "<mandos@recompile.se>";
134
131
static const char sys_class_net[] = "/sys/class/net";
135
132
char *connect_to = NULL;
136
const char *hookdir = HOOKDIR;
137
133
138
134
/* Doubly linked list that need to be circularly linked when used */
139
135
typedef struct server{
180
176
* "buffer_length" is how much is already used.
181
177
*/
182
178
size_t incbuffer(char **buffer, size_t buffer_length,
183
size_t buffer_capacity){
179
size_t buffer_capacity){
184
180
if(buffer_length + BUFFER_SIZE > buffer_capacity){
185
181
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
186
182
if(buffer == NULL){
192
188
}
193
189
194
190
/* Add server to set of servers to retry periodically */
195
int add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
196
int af){
191
int add_server(const char *ip, uint16_t port,
192
AvahiIfIndex if_index,
193
int af){
197
194
int ret;
198
195
server *new_server = malloc(sizeof(server));
199
196
if(new_server == NULL){
201
198
return -1;
202
199
}
203
200
*new_server = (server){ .ip = strdup(ip),
204
.port = port,
205
.if_index = if_index,
206
.af = af };
201
.port = port,
202
.if_index = if_index,
203
.af = af };
207
204
if(new_server->ip == NULL){
208
205
perror_plus("strdup");
209
206
return -1;
231
228
/*
232
229
* Initialize GPGME.
233
230
*/
234
static bool init_gpgme(const char *seckey, const char *pubkey,
235
const char *tempdir){
231
static bool init_gpgme(const char *seckey,
232
const char *pubkey, const char *tempdir){
236
233
gpgme_error_t rc;
237
234
gpgme_engine_info_t engine_info;
238
235
253
250
254
251
rc = gpgme_data_new_from_fd(&pgp_data, fd);
255
252
if(rc != GPG_ERR_NO_ERROR){
256
fprintf(stderr, "Mandos plugin mandos-client: "
257
"bad gpgme_data_new_from_fd: %s: %s\n",
253
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
258
254
gpgme_strsource(rc), gpgme_strerror(rc));
259
255
return false;
260
256
}
261
257
262
258
rc = gpgme_op_import(mc.ctx, pgp_data);
263
259
if(rc != GPG_ERR_NO_ERROR){
264
fprintf(stderr, "Mandos plugin mandos-client: "
265
"bad gpgme_op_import: %s: %s\n",
260
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
266
261
gpgme_strsource(rc), gpgme_strerror(rc));
267
262
return false;
268
263
}
276
271
}
277
272
278
273
if(debug){
279
fprintf(stderr, "Mandos plugin mandos-client: "
280
"Initializing GPGME\n");
274
fprintf(stderr, "Initializing GPGME\n");
281
275
}
282
276
283
277
/* Init GPGME */
284
278
gpgme_check_version(NULL);
285
279
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
286
280
if(rc != GPG_ERR_NO_ERROR){
287
fprintf(stderr, "Mandos plugin mandos-client: "
288
"bad gpgme_engine_check_version: %s: %s\n",
281
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
289
282
gpgme_strsource(rc), gpgme_strerror(rc));
290
283
return false;
291
284
}
293
286
/* Set GPGME home directory for the OpenPGP engine only */
294
287
rc = gpgme_get_engine_info(&engine_info);
295
288
if(rc != GPG_ERR_NO_ERROR){
296
fprintf(stderr, "Mandos plugin mandos-client: "
297
"bad gpgme_get_engine_info: %s: %s\n",
289
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
298
290
gpgme_strsource(rc), gpgme_strerror(rc));
299
291
return false;
300
292
}
307
299
engine_info = engine_info->next;
308
300
}
309
301
if(engine_info == NULL){
310
fprintf(stderr, "Mandos plugin mandos-client: "
311
"Could not set GPGME home dir to %s\n", tempdir);
302
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
312
303
return false;
313
304
}
314
305
315
306
/* Create new GPGME "context" */
316
307
rc = gpgme_new(&(mc.ctx));
317
308
if(rc != GPG_ERR_NO_ERROR){
318
fprintf(stderr, "Mandos plugin mandos-client: "
319
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
320
gpgme_strerror(rc));
309
fprintf(stderr, "bad gpgme_new: %s: %s\n",
310
gpgme_strsource(rc), gpgme_strerror(rc));
321
311
return false;
322
312
}
323
313
342
332
ssize_t plaintext_length = 0;
343
333
344
334
if(debug){
345
fprintf(stderr, "Mandos plugin mandos-client: "
346
"Trying to decrypt OpenPGP data\n");
335
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
347
336
}
348
337
349
338
/* Create new GPGME data buffer from memory cryptotext */
350
339
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
351
340
0);
352
341
if(rc != GPG_ERR_NO_ERROR){
353
fprintf(stderr, "Mandos plugin mandos-client: "
354
"bad gpgme_data_new_from_mem: %s: %s\n",
342
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
355
343
gpgme_strsource(rc), gpgme_strerror(rc));
356
344
return -1;
357
345
}
359
347
/* Create new empty GPGME data buffer for the plaintext */
360
348
rc = gpgme_data_new(&dh_plain);
361
349
if(rc != GPG_ERR_NO_ERROR){
362
fprintf(stderr, "Mandos plugin mandos-client: "
363
"bad gpgme_data_new: %s: %s\n",
350
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
364
351
gpgme_strsource(rc), gpgme_strerror(rc));
365
352
gpgme_data_release(dh_crypto);
366
353
return -1;
370
357
data buffer */
371
358
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
372
359
if(rc != GPG_ERR_NO_ERROR){
373
fprintf(stderr, "Mandos plugin mandos-client: "
374
"bad gpgme_op_decrypt: %s: %s\n",
360
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
375
361
gpgme_strsource(rc), gpgme_strerror(rc));
376
362
plaintext_length = -1;
377
363
if(debug){
378
364
gpgme_decrypt_result_t result;
379
365
result = gpgme_op_decrypt_result(mc.ctx);
380
366
if(result == NULL){
381
fprintf(stderr, "Mandos plugin mandos-client: "
382
"gpgme_op_decrypt_result failed\n");
367
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
383
368
} else {
384
fprintf(stderr, "Mandos plugin mandos-client: "
385
"Unsupported algorithm: %s\n",
369
fprintf(stderr, "Unsupported algorithm: %s\n",
386
370
result->unsupported_algorithm);
387
fprintf(stderr, "Mandos plugin mandos-client: "
388
"Wrong key usage: %u\n",
371
fprintf(stderr, "Wrong key usage: %u\n",
389
372
result->wrong_key_usage);
390
373
if(result->file_name != NULL){
391
fprintf(stderr, "Mandos plugin mandos-client: "
392
"File name: %s\n", result->file_name);
374
fprintf(stderr, "File name: %s\n", result->file_name);
393
375
}
394
376
gpgme_recipient_t recipient;
395
377
recipient = result->recipients;
396
378
while(recipient != NULL){
397
fprintf(stderr, "Mandos plugin mandos-client: "
398
"Public key algorithm: %s\n",
379
fprintf(stderr, "Public key algorithm: %s\n",
399
380
gpgme_pubkey_algo_name(recipient->pubkey_algo));
400
fprintf(stderr, "Mandos plugin mandos-client: "
401
"Key ID: %s\n", recipient->keyid);
402
fprintf(stderr, "Mandos plugin mandos-client: "
403
"Secret key available: %s\n",
381
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
382
fprintf(stderr, "Secret key available: %s\n",
404
383
recipient->status == GPG_ERR_NO_SECKEY
405
384
? "No" : "Yes");
406
385
recipient = recipient->next;
411
390
}
412
391
413
392
if(debug){
414
fprintf(stderr, "Mandos plugin mandos-client: "
415
"Decryption of OpenPGP data succeeded\n");
393
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
416
394
}
417
395
418
396
/* Seek back to the beginning of the GPGME plaintext data buffer */
425
403
*plaintext = NULL;
426
404
while(true){
427
405
plaintext_capacity = incbuffer(plaintext,
428
(size_t)plaintext_length,
429
plaintext_capacity);
406
(size_t)plaintext_length,
407
plaintext_capacity);
430
408
if(plaintext_capacity == 0){
431
perror_plus("incbuffer");
432
plaintext_length = -1;
433
goto decrypt_end;
409
perror_plus("incbuffer");
410
plaintext_length = -1;
411
goto decrypt_end;
434
412
}
435
413
436
414
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
449
427
}
450
428
451
429
if(debug){
452
fprintf(stderr, "Mandos plugin mandos-client: "
453
"Decrypted password is: ");
430
fprintf(stderr, "Decrypted password is: ");
454
431
for(ssize_t i = 0; i < plaintext_length; i++){
455
432
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
456
433
}
478
455
/* GnuTLS log function callback */
479
456
static void debuggnutls(__attribute__((unused)) int level,
480
457
const char* string){
481
fprintf(stderr, "Mandos plugin mandos-client: GnuTLS: %s", string);
458
fprintf(stderr, "GnuTLS: %s", string);
482
459
}
483
460
484
461
static int init_gnutls_global(const char *pubkeyfilename,
486
463
int ret;
487
464
488
465
if(debug){
489
fprintf(stderr, "Mandos plugin mandos-client: "
490
"Initializing GnuTLS\n");
466
fprintf(stderr, "Initializing GnuTLS\n");
491
467
}
492
468
493
469
ret = gnutls_global_init();
494
470
if(ret != GNUTLS_E_SUCCESS){
495
fprintf(stderr, "Mandos plugin mandos-client: "
496
"GnuTLS global_init: %s\n", safer_gnutls_strerror(ret));
471
fprintf(stderr, "GnuTLS global_init: %s\n",
472
safer_gnutls_strerror(ret));
497
473
return -1;
498
474
}
499
475
508
484
/* OpenPGP credentials */
509
485
ret = gnutls_certificate_allocate_credentials(&mc.cred);
510
486
if(ret != GNUTLS_E_SUCCESS){
511
fprintf(stderr, "Mandos plugin mandos-client: "
512
"GnuTLS memory error: %s\n", safer_gnutls_strerror(ret));
487
fprintf(stderr, "GnuTLS memory error: %s\n",
488
safer_gnutls_strerror(ret));
513
489
gnutls_global_deinit();
514
490
return -1;
515
491
}
516
492
517
493
if(debug){
518
fprintf(stderr, "Mandos plugin mandos-client: "
519
"Attempting to use OpenPGP public key %s and"
494
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
520
495
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
521
496
seckeyfilename);
522
497
}
526
501
GNUTLS_OPENPGP_FMT_BASE64);
527
502
if(ret != GNUTLS_E_SUCCESS){
528
503
fprintf(stderr,
529
"Mandos plugin mandos-client: "
530
504
"Error[%d] while reading the OpenPGP key pair ('%s',"
531
505
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
532
fprintf(stderr, "Mandos plugin mandos-client: "
533
"The GnuTLS error is: %s\n", safer_gnutls_strerror(ret));
506
fprintf(stderr, "The GnuTLS error is: %s\n",
507
safer_gnutls_strerror(ret));
534
508
goto globalfail;
535
509
}
536
510
537
511
/* GnuTLS server initialization */
538
512
ret = gnutls_dh_params_init(&mc.dh_params);
539
513
if(ret != GNUTLS_E_SUCCESS){
540
fprintf(stderr, "Mandos plugin mandos-client: "
541
"Error in GnuTLS DH parameter initialization:"
514
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
542
515
" %s\n", safer_gnutls_strerror(ret));
543
516
goto globalfail;
544
517
}
545
518
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
546
519
if(ret != GNUTLS_E_SUCCESS){
547
fprintf(stderr, "Mandos plugin mandos-client: "
548
"Error in GnuTLS prime generation: %s\n",
520
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
549
521
safer_gnutls_strerror(ret));
550
522
goto globalfail;
551
523
}
572
544
}
573
545
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
574
546
if(ret != GNUTLS_E_SUCCESS){
575
fprintf(stderr, "Mandos plugin mandos-client: "
576
"Error in GnuTLS session initialization: %s\n",
547
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
577
548
safer_gnutls_strerror(ret));
578
549
}
579
550
587
558
}
588
559
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
589
560
if(ret != GNUTLS_E_SUCCESS){
590
fprintf(stderr, "Mandos plugin mandos-client: "
591
"Syntax error at: %s\n", err);
592
fprintf(stderr, "Mandos plugin mandos-client: "
593
"GnuTLS error: %s\n", safer_gnutls_strerror(ret));
561
fprintf(stderr, "Syntax error at: %s\n", err);
562
fprintf(stderr, "GnuTLS error: %s\n",
563
safer_gnutls_strerror(ret));
594
564
gnutls_deinit(*session);
595
565
return -1;
596
566
}
605
575
}
606
576
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
607
577
if(ret != GNUTLS_E_SUCCESS){
608
fprintf(stderr, "Mandos plugin mandos-client: "
609
"Error setting GnuTLS credentials: %s\n",
578
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
610
579
safer_gnutls_strerror(ret));
611
580
gnutls_deinit(*session);
612
581
return -1;
658
627
pf = PF_INET;
659
628
break;
660
629
default:
661
fprintf(stderr, "Mandos plugin mandos-client: "
662
"Bad address family: %d\n", af);
630
fprintf(stderr, "Bad address family: %d\n", af);
663
631
errno = EINVAL;
664
632
return -1;
665
633
}
670
638
}
671
639
672
640
if(debug){
673
fprintf(stderr, "Mandos plugin mandos-client: "
674
"Setting up a TCP connection to %s, port %" PRIu16
641
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
675
642
"\n", ip, port);
676
643
}
677
644
704
671
}
705
672
if(ret == 0){
706
673
int e = errno;
707
fprintf(stderr, "Mandos plugin mandos-client: "
708
"Bad address: %s\n", ip);
674
fprintf(stderr, "Bad address: %s\n", ip);
709
675
errno = e;
710
676
goto mandos_end;
711
677
}
716
682
717
683
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
718
684
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
719
-Wunreachable-code*/
685
-Wunreachable-code*/
720
686
if(if_index == AVAHI_IF_UNSPEC){
721
fprintf(stderr, "Mandos plugin mandos-client: "
722
"An IPv6 link-local address is incomplete"
687
fprintf(stderr, "An IPv6 link-local address is incomplete"
723
688
" without a network interface\n");
724
689
errno = EINVAL;
725
690
goto mandos_end;
744
709
if(if_indextoname((unsigned int)if_index, interface) == NULL){
745
710
perror_plus("if_indextoname");
746
711
} else {
747
fprintf(stderr, "Mandos plugin mandos-client: "
748
"Connection to: %s%%%s, port %" PRIu16 "\n",
712
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
749
713
ip, interface, port);
750
714
}
751
715
} else {
752
fprintf(stderr, "Mandos plugin mandos-client: "
753
"Connection to: %s, port %" PRIu16 "\n", ip, port);
716
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
717
port);
754
718
}
755
719
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
756
720
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
766
730
perror_plus("inet_ntop");
767
731
} else {
768
732
if(strcmp(addrstr, ip) != 0){
769
fprintf(stderr, "Mandos plugin mandos-client: "
770
"Canonical address form: %s\n", addrstr);
733
fprintf(stderr, "Canonical address form: %s\n", addrstr);
771
734
}
772
735
}
773
736
}
801
764
while(true){
802
765
size_t out_size = strlen(out);
803
766
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
804
out_size - written));
767
out_size - written));
805
768
if(ret == -1){
806
769
int e = errno;
807
770
perror_plus("write");
827
790
}
828
791
829
792
if(debug){
830
fprintf(stderr, "Mandos plugin mandos-client: "
831
"Establishing TLS session with %s\n", ip);
793
fprintf(stderr, "Establishing TLS session with %s\n", ip);
832
794
}
833
795
834
796
if(quit_now){
854
816
855
817
if(ret != GNUTLS_E_SUCCESS){
856
818
if(debug){
857
fprintf(stderr, "Mandos plugin mandos-client: "
858
"*** GnuTLS Handshake failed ***\n");
819
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
859
820
gnutls_perror(ret);
860
821
}
861
822
errno = EPROTO;
865
826
/* Read OpenPGP packet that contains the wanted password */
866
827
867
828
if(debug){
868
fprintf(stderr, "Mandos plugin mandos-client: "
869
"Retrieving OpenPGP encrypted password from %s\n", ip);
829
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
830
ip);
870
831
}
871
832
872
833
while(true){
877
838
}
878
839
879
840
buffer_capacity = incbuffer(&buffer, buffer_length,
880
buffer_capacity);
841
buffer_capacity);
881
842
if(buffer_capacity == 0){
882
843
int e = errno;
883
844
perror_plus("incbuffer");
910
871
}
911
872
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
912
873
if(ret < 0){
913
fprintf(stderr, "Mandos plugin mandos-client: "
914
"*** GnuTLS Re-handshake failed ***\n");
874
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
915
875
gnutls_perror(ret);
916
876
errno = EPROTO;
917
877
goto mandos_end;
918
878
}
919
879
break;
920
880
default:
921
fprintf(stderr, "Mandos plugin mandos-client: "
922
"Unknown error while reading data from"
881
fprintf(stderr, "Unknown error while reading data from"
923
882
" encrypted session with Mandos server\n");
924
883
gnutls_bye(session, GNUTLS_SHUT_RDWR);
925
884
errno = EIO;
931
890
}
932
891
933
892
if(debug){
934
fprintf(stderr, "Mandos plugin mandos-client: "
935
"Closing TLS session\n");
893
fprintf(stderr, "Closing TLS session\n");
936
894
}
937
895
938
896
if(quit_now){
950
908
951
909
if(buffer_length > 0){
952
910
ssize_t decrypted_buffer_size;
953
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
911
decrypted_buffer_size = pgp_packet_decrypt(buffer,
912
buffer_length,
954
913
&decrypted_buffer);
955
914
if(decrypted_buffer_size >= 0){
956
915
967
926
if(ret == 0 and ferror(stdout)){
968
927
int e = errno;
969
928
if(debug){
970
fprintf(stderr, "Mandos plugin mandos-client: "
971
"Error writing encrypted data: %s\n",
929
fprintf(stderr, "Error writing encrypted data: %s\n",
972
930
strerror(errno));
973
931
}
974
932
errno = e;
1032
990
switch(event){
1033
991
default:
1034
992
case AVAHI_RESOLVER_FAILURE:
1035
fprintf(stderr, "Mandos plugin mandos-client: "
1036
"(Avahi Resolver) Failed to resolve service '%s'"
993
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
1037
994
" of type '%s' in domain '%s': %s\n", name, type, domain,
1038
995
avahi_strerror(avahi_server_errno(mc.server)));
1039
996
break;
1043
1000
char ip[AVAHI_ADDRESS_STR_MAX];
1044
1001
avahi_address_snprint(ip, sizeof(ip), address);
1045
1002
if(debug){
1046
fprintf(stderr, "Mandos plugin mandos-client: "
1047
"Mandos server \"%s\" found on %s (%s, %"
1003
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
1048
1004
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
1049
1005
ip, (intmax_t)interface, port);
1050
1006
}
1084
1040
default:
1085
1041
case AVAHI_BROWSER_FAILURE:
1086
1042
1087
fprintf(stderr, "Mandos plugin mandos-client: "
1088
"(Avahi browser) %s\n",
1043
fprintf(stderr, "(Avahi browser) %s\n",
1089
1044
avahi_strerror(avahi_server_errno(mc.server)));
1090
1045
avahi_simple_poll_quit(mc.simple_poll);
1091
1046
return;
1099
1054
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1100
1055
name, type, domain, protocol, 0,
1101
1056
resolve_callback, NULL) == NULL)
1102
fprintf(stderr, "Mandos plugin mandos-client: "
1103
"Avahi: Failed to resolve service '%s': %s\n",
1057
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
1104
1058
name, avahi_strerror(avahi_server_errno(mc.server)));
1105
1059
break;
1106
1060
1110
1064
case AVAHI_BROWSER_ALL_FOR_NOW:
1111
1065
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1112
1066
if(debug){
1113
fprintf(stderr, "Mandos plugin mandos-client: "
1114
"No Mandos server found, still searching...\n");
1067
fprintf(stderr, "No Mandos server found, still searching...\n");
1115
1068
}
1116
1069
break;
1117
1070
}
1132
1085
errno = old_errno;
1133
1086
}
1134
1087
1135
bool get_flags(const char *ifname, struct ifreq *ifr){
1136
int ret;
1137
1138
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1139
if(s < 0){
1140
perror_plus("socket");
1141
return false;
1142
}
1143
strcpy(ifr->ifr_name, ifname);
1144
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1145
if(ret == -1){
1088
/*
1089
* This function determines if a directory entry in /sys/class/net
1090
* corresponds to an acceptable network device.
1091
* (This function is passed to scandir(3) as a filter function.)
1092
*/
1093
int good_interface(const struct dirent *if_entry){
1094
ssize_t ssret;
1095
char *flagname = NULL;
1096
if(if_entry->d_name[0] == '.'){
1097
return 0;
1098
}
1099
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1100
if_entry->d_name);
1101
if(ret < 0){
1102
perror_plus("asprintf");
1103
return 0;
1104
}
1105
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1106
if(flags_fd == -1){
1107
perror_plus("open");
1108
free(flagname);
1109
return 0;
1110
}
1111
free(flagname);
1112
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1113
/* read line from flags_fd */
1114
ssize_t to_read = 2+(sizeof(ifreq_flags)*2)+1; /* "0x1003\n" */
1115
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1116
flagstring[(size_t)to_read] = '\0';
1117
if(flagstring == NULL){
1118
perror_plus("malloc");
1119
close(flags_fd);
1120
return 0;
1121
}
1122
while(to_read > 0){
1123
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1124
(size_t)to_read));
1125
if(ssret == -1){
1126
perror_plus("read");
1127
free(flagstring);
1128
close(flags_fd);
1129
return 0;
1130
}
1131
to_read -= ssret;
1132
if(ssret == 0){
1133
break;
1134
}
1135
}
1136
close(flags_fd);
1137
intmax_t tmpmax;
1138
char *tmp;
1139
errno = 0;
1140
tmpmax = strtoimax(flagstring, &tmp, 0);
1141
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1142
and not (isspace(*tmp)))
1143
or tmpmax != (ifreq_flags)tmpmax){
1146
1144
if(debug){
1147
perror_plus("ioctl SIOCGIFFLAGS");
1145
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1146
flagstring, if_entry->d_name);
1148
1147
}
1149
return false;
1148
free(flagstring);
1149
return 0;
1150
1150
}
1151
return true;
1152
}
1153
1154
bool good_flags(const char *ifname, const struct ifreq *ifr){
1155
1151
free(flagstring);
1152
ifreq_flags flags = (ifreq_flags)tmpmax;
1156
1153
/* Reject the loopback device */
1157
if(ifr->ifr_flags & IFF_LOOPBACK){
1154
if(flags & IFF_LOOPBACK){
1158
1155
if(debug){
1159
fprintf(stderr, "Mandos plugin mandos-client: "
1160
"Rejecting loopback interface \"%s\"\n", ifname);
1156
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1157
if_entry->d_name);
1161
1158
}
1162
return false;
1159
return 0;
1163
1160
}
1164
1161
/* Accept point-to-point devices only if connect_to is specified */
1165
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1162
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1166
1163
if(debug){
1167
fprintf(stderr, "Mandos plugin mandos-client: "
1168
"Accepting point-to-point interface \"%s\"\n", ifname);
1164
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1165
if_entry->d_name);
1169
1166
}
1170
return true;
1167
return 1;
1171
1168
}
1172
1169
/* Otherwise, reject non-broadcast-capable devices */
1173
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1170
if(not (flags & IFF_BROADCAST)){
1174
1171
if(debug){
1175
fprintf(stderr, "Mandos plugin mandos-client: "
1176
"Rejecting non-broadcast interface \"%s\"\n", ifname);
1172
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1173
if_entry->d_name);
1177
1174
}
1178
return false;
1175
return 0;
1179
1176
}
1180
1177
/* Reject non-ARP interfaces (including dummy interfaces) */
1181
if(ifr->ifr_flags & IFF_NOARP){
1178
if(flags & IFF_NOARP){
1182
1179
if(debug){
1183
fprintf(stderr, "Mandos plugin mandos-client: "
1184
"Rejecting non-ARP interface \"%s\"\n", ifname);
1180
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n",
1181
if_entry->d_name);
1185
1182
}
1186
return false;
1183
return 0;
1187
1184
}
1188
1189
1185
/* Accept this device */
1190
1186
if(debug){
1191
fprintf(stderr, "Mandos plugin mandos-client: "
1192
"Interface \"%s\" is good\n", ifname);
1193
}
1194
return true;
1195
}
1196
1197
/*
1198
* This function determines if a directory entry in /sys/class/net
1199
* corresponds to an acceptable network device.
1200
* (This function is passed to scandir(3) as a filter function.)
1201
*/
1202
int good_interface(const struct dirent *if_entry){
1203
if(if_entry->d_name[0] == '.'){
1204
return 0;
1205
}
1206
1207
struct ifreq ifr;
1208
if(not get_flags(if_entry->d_name, &ifr)){
1209
if(debug){
1210
fprintf(stderr, "Mandos plugin mandos-client: "
1211
"Failed to get flags for interface \"%s\"\n",
1212
if_entry->d_name);
1213
}
1214
return 0;
1215
}
1216
1217
if(not good_flags(if_entry->d_name, &ifr)){
1218
return 0;
1219
}
1220
return 1;
1221
}
1222
1223
/*
1224
* This function determines if a directory entry in /sys/class/net
1225
* corresponds to an acceptable network device which is up.
1226
* (This function is passed to scandir(3) as a filter function.)
1227
*/
1228
int up_interface(const struct dirent *if_entry){
1229
if(if_entry->d_name[0] == '.'){
1230
return 0;
1231
}
1232
1233
struct ifreq ifr;
1234
if(not get_flags(if_entry->d_name, &ifr)){
1235
if(debug){
1236
fprintf(stderr, "Mandos plugin mandos-client: "
1237
"Failed to get flags for interface \"%s\"\n",
1238
if_entry->d_name);
1239
}
1240
return 0;
1241
}
1242
1243
/* Reject down interfaces */
1244
if(not (ifr.ifr_flags & IFF_UP)){
1245
if(debug){
1246
fprintf(stderr, "Mandos plugin mandos-client: "
1247
"Rejecting down interface \"%s\"\n",
1248
if_entry->d_name);
1249
}
1250
return 0;
1251
}
1252
1253
/* Reject non-running interfaces */
1254
if(not (ifr.ifr_flags & IFF_RUNNING)){
1255
if(debug){
1256
fprintf(stderr, "Mandos plugin mandos-client: "
1257
"Rejecting non-running interface \"%s\"\n",
1258
if_entry->d_name);
1259
}
1260
return 0;
1261
}
1262
1263
if(not good_flags(if_entry->d_name, &ifr)){
1264
return 0;
1187
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1188
if_entry->d_name);
1265
1189
}
1266
1190
return 1;
1267
1191
}
1277
1201
return 1;
1278
1202
}
1279
1203
1280
/* Is this directory entry a runnable program? */
1281
int runnable_hook(const struct dirent *direntry){
1282
int ret;
1283
size_t sret;
1284
struct stat st;
1285
1286
if((direntry->d_name)[0] == '\0'){
1287
/* Empty name? */
1288
return 0;
1289
}
1290
1291
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1292
"abcdefghijklmnopqrstuvwxyz"
1293
"0123456789"
1294
"_-");
1295
if((direntry->d_name)[sret] != '\0'){
1296
/* Contains non-allowed characters */
1297
if(debug){
1298
fprintf(stderr, "Mandos plugin mandos-client: "
1299
"Ignoring hook \"%s\" with bad name\n",
1300
direntry->d_name);
1301
}
1302
return 0;
1303
}
1304
1305
char *fullname = NULL;
1306
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1307
if(ret < 0){
1308
perror_plus("asprintf");
1309
return 0;
1310
}
1311
1312
ret = stat(fullname, &st);
1313
if(ret == -1){
1314
if(debug){
1315
perror_plus("Could not stat hook");
1316
}
1317
return 0;
1318
}
1319
if(not (S_ISREG(st.st_mode))){
1320
/* Not a regular file */
1321
if(debug){
1322
fprintf(stderr, "Mandos plugin mandos-client: "
1323
"Ignoring hook \"%s\" - not a file\n",
1324
direntry->d_name);
1325
}
1326
return 0;
1327
}
1328
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1329
/* Not executable */
1330
if(debug){
1331
fprintf(stderr, "Mandos plugin mandos-client: "
1332
"Ignoring hook \"%s\" - not executable\n",
1333
direntry->d_name);
1334
}
1335
return 0;
1336
}
1337
return 1;
1338
}
1339
1340
1204
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1341
1205
int ret;
1342
1206
struct timespec now;
1346
1210
while(true){
1347
1211
if(mc.current_server == NULL){
1348
1212
if (debug){
1349
fprintf(stderr, "Mandos plugin mandos-client: "
1213
fprintf(stderr,
1350
1214
"Wait until first server is found. No timeout!\n");
1351
1215
}
1352
1216
ret = avahi_simple_poll_iterate(s, -1);
1353
1217
} else {
1354
1218
if (debug){
1355
fprintf(stderr, "Mandos plugin mandos-client: "
1356
"Check current_server if we should run it,"
1219
fprintf(stderr, "Check current_server if we should run it,"
1357
1220
" or wait\n");
1358
1221
}
1359
1222
/* the current time */
1376
1239
- ((intmax_t)waited_time.tv_nsec / 1000000));
1377
1240
1378
1241
if (debug){
1379
fprintf(stderr, "Mandos plugin mandos-client: "
1380
"Blocking for %" PRIdMAX " ms\n", block_time);
1242
fprintf(stderr, "Blocking for %" PRIdMAX " ms\n", block_time);
1381
1243
}
1382
1244
1383
1245
if(block_time <= 0){
1403
1265
ret = avahi_simple_poll_iterate(s, (int)block_time);
1404
1266
}
1405
1267
if(ret != 0){
1406
if (ret > 0 or errno != EINTR){
1268
if (ret > 0 or errno != EINTR) {
1407
1269
return (ret != 1) ? ret : 0;
1408
1270
}
1409
1271
}
1410
1272
}
1411
1273
}
1412
1274
1413
bool run_network_hooks(const char *mode, const char *interface,
1414
const float delay){
1415
struct dirent **direntries;
1416
struct dirent *direntry;
1417
int ret;
1418
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1419
alphasort);
1420
if(numhooks == -1){
1421
perror_plus("scandir");
1422
} else {
1423
int devnull = open("/dev/null", O_RDONLY);
1424
for(int i = 0; i < numhooks; i++){
1425
direntry = direntries[0];
1426
char *fullname = NULL;
1427
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1428
if(ret < 0){
1429
perror_plus("asprintf");
1430
continue;
1431
}
1432
pid_t hook_pid = fork();
1433
if(hook_pid == 0){
1434
/* Child */
1435
dup2(devnull, STDIN_FILENO);
1436
close(devnull);
1437
dup2(STDERR_FILENO, STDOUT_FILENO);
1438
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1439
if(ret == -1){
1440
perror_plus("setenv");
1441
return false;
1442
}
1443
ret = setenv("DEVICE", interface, 1);
1444
if(ret == -1){
1445
perror_plus("setenv");
1446
return false;
1447
}
1448
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1449
if(ret == -1){
1450
perror_plus("setenv");
1451
return false;
1452
}
1453
ret = setenv("MODE", mode, 1);
1454
if(ret == -1){
1455
perror_plus("setenv");
1456
return false;
1457
}
1458
char *delaystring;
1459
ret = asprintf(&delaystring, "%f", delay);
1460
if(ret == -1){
1461
perror_plus("asprintf");
1462
return false;
1463
}
1464
ret = setenv("DELAY", delaystring, 1);
1465
if(ret == -1){
1466
free(delaystring);
1467
perror_plus("setenv");
1468
return false;
1469
}
1470
free(delaystring);
1471
ret = execl(fullname, direntry->d_name, mode, NULL);
1472
perror_plus("execl");
1473
} else {
1474
int status;
1475
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1476
perror_plus("waitpid");
1477
free(fullname);
1478
continue;
1479
}
1480
if(WIFEXITED(status)){
1481
if(WEXITSTATUS(status) != 0){
1482
fprintf(stderr, "Mandos plugin mandos-client: "
1483
"Warning: network hook \"%s\" exited"
1484
" with status %d\n", direntry->d_name,
1485
WEXITSTATUS(status));
1486
free(fullname);
1487
continue;
1488
}
1489
} else if(WIFSIGNALED(status)){
1490
fprintf(stderr, "Mandos plugin mandos-client: "
1491
"Warning: network hook \"%s\" died by"
1492
" signal %d\n", direntry->d_name,
1493
WTERMSIG(status));
1494
free(fullname);
1495
continue;
1496
} else {
1497
fprintf(stderr, "Mandos plugin mandos-client: "
1498
"Warning: network hook \"%s\" crashed\n",
1499
direntry->d_name);
1500
free(fullname);
1501
continue;
1502
}
1503
}
1504
free(fullname);
1505
if(quit_now){
1506
break;
1507
}
1508
}
1509
close(devnull);
1510
}
1511
return true;
1512
}
1513
1514
1275
int main(int argc, char *argv[]){
1515
1276
AvahiSServiceBrowser *sb = NULL;
1516
1277
int error;
1598
1359
.arg = "SECONDS",
1599
1360
.doc = "Retry interval used when denied by the mandos server",
1600
1361
.group = 2 },
1601
{ .name = "network-hook-dir", .key = 133,
1602
.arg = "DIR",
1603
.doc = "Directory where network hooks are located",
1604
.group = 2 },
1605
1362
/*
1606
1363
* These reproduce what we would get without ARGP_NO_HELP
1607
1364
*/
1660
1417
argp_error(state, "Bad retry interval");
1661
1418
}
1662
1419
break;
1663
case 133: /* --network-hook-dir */
1664
hookdir = arg;
1665
break;
1666
1420
/*
1667
1421
* These reproduce what we would get without ARGP_NO_HELP
1668
1422
*/
1674
1428
argp_state_help(state, state->out_stream,
1675
1429
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1676
1430
case 'V': /* --version */
1677
fprintf(state->out_stream, "Mandos plugin mandos-client: ");
1678
1431
fprintf(state->out_stream, "%s\n", argp_program_version);
1679
1432
exit(argp_err_exit_status);
1680
1433
break;
1765
1518
}
1766
1519
}
1767
1520
1768
/* Run network hooks */
1769
{
1770
/* Re-raise priviliges */
1771
errno = 0;
1772
ret = seteuid(0);
1773
if(ret == -1){
1774
perror_plus("seteuid");
1775
}
1776
if(not run_network_hooks("start", interface, delay)){
1777
goto end;
1778
}
1779
/* Lower privileges */
1780
errno = 0;
1781
ret = seteuid(uid);
1782
if(ret == -1){
1783
perror_plus("seteuid");
1784
}
1785
}
1786
1787
1521
if(not debug){
1788
1522
avahi_set_log_function(empty_log);
1789
1523
}
1790
1524
1791
1525
if(interface[0] == '\0'){
1792
1526
struct dirent **direntries;
1793
/* First look for interfaces that are up */
1794
ret = scandir(sys_class_net, &direntries, up_interface,
1527
ret = scandir(sys_class_net, &direntries, good_interface,
1795
1528
alphasort);
1796
if(ret == 0){
1797
/* No up interfaces, look for any good interfaces */
1798
free(direntries);
1799
ret = scandir(sys_class_net, &direntries, good_interface,
1800
alphasort);
1801
}
1802
1529
if(ret >= 1){
1803
/* Pick the first interface returned */
1530
/* Pick the first good interface */
1804
1531
interface = strdup(direntries[0]->d_name);
1805
1532
if(debug){
1806
fprintf(stderr, "Mandos plugin mandos-client: "
1807
"Using interface \"%s\"\n", interface);
1533
fprintf(stderr, "Using interface \"%s\"\n", interface);
1808
1534
}
1809
1535
if(interface == NULL){
1810
1536
perror_plus("malloc");
1815
1541
free(direntries);
1816
1542
} else {
1817
1543
free(direntries);
1818
fprintf(stderr, "Mandos plugin mandos-client: "
1819
"Could not find a network interface\n");
1544
fprintf(stderr, "Could not find a network interface\n");
1820
1545
exitcode = EXIT_FAILURE;
1821
1546
goto end;
1822
1547
}
1828
1553
srand((unsigned int) time(NULL));
1829
1554
mc.simple_poll = avahi_simple_poll_new();
1830
1555
if(mc.simple_poll == NULL){
1831
fprintf(stderr, "Mandos plugin mandos-client: "
1832
"Avahi: Failed to create simple poll object.\n");
1556
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1833
1557
exitcode = EX_UNAVAILABLE;
1834
1558
goto end;
1835
1559
}
1901
1625
if(strcmp(interface, "none") != 0){
1902
1626
if_index = (AvahiIfIndex) if_nametoindex(interface);
1903
1627
if(if_index == 0){
1904
fprintf(stderr, "Mandos plugin mandos-client: "
1905
"No such interface: \"%s\"\n", interface);
1628
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1906
1629
exitcode = EX_UNAVAILABLE;
1907
1630
goto end;
1908
1631
}
2028
1751
#endif /* __linux__ */
2029
1752
/* Lower privileges */
2030
1753
errno = 0;
2031
/* Lower privileges */
2032
ret = seteuid(uid);
2033
if(ret == -1){
2034
perror_plus("seteuid");
1754
if(take_down_interface){
1755
/* Lower privileges */
1756
ret = seteuid(uid);
1757
if(ret == -1){
1758
perror_plus("seteuid");
1759
}
1760
} else {
1761
/* Lower privileges permanently */
1762
ret = setuid(uid);
1763
if(ret == -1){
1764
perror_plus("setuid");
1765
}
2035
1766
}
2036
1767
}
2037
1768
2041
1772
2042
1773
ret = init_gnutls_global(pubkey, seckey);
2043
1774
if(ret == -1){
2044
fprintf(stderr, "Mandos plugin mandos-client: "
2045
"init_gnutls_global failed\n");
1775
fprintf(stderr, "init_gnutls_global failed\n");
2046
1776
exitcode = EX_UNAVAILABLE;
2047
1777
goto end;
2048
1778
} else {
2064
1794
}
2065
1795
2066
1796
if(not init_gpgme(pubkey, seckey, tempdir)){
2067
fprintf(stderr, "Mandos plugin mandos-client: "
2068
"init_gpgme failed\n");
1797
fprintf(stderr, "init_gpgme failed\n");
2069
1798
exitcode = EX_UNAVAILABLE;
2070
1799
goto end;
2071
1800
} else {
2081
1810
/* (Mainly meant for debugging) */
2082
1811
char *address = strrchr(connect_to, ':');
2083
1812
if(address == NULL){
2084
fprintf(stderr, "Mandos plugin mandos-client: "
2085
"No colon in address\n");
1813
fprintf(stderr, "No colon in address\n");
2086
1814
exitcode = EX_USAGE;
2087
1815
goto end;
2088
1816
}
2096
1824
tmpmax = strtoimax(address+1, &tmp, 10);
2097
1825
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2098
1826
or tmpmax != (uint16_t)tmpmax){
2099
fprintf(stderr, "Mandos plugin mandos-client: "
2100
"Bad port number\n");
1827
fprintf(stderr, "Bad port number\n");
2101
1828
exitcode = EX_USAGE;
2102
1829
goto end;
2103
1830
}
2133
1860
break;
2134
1861
}
2135
1862
if(debug){
2136
fprintf(stderr, "Mandos plugin mandos-client: "
2137
"Retrying in %d seconds\n", (int)retry_interval);
1863
fprintf(stderr, "Retrying in %d seconds\n",
1864
(int)retry_interval);
2138
1865
}
2139
1866
sleep((int)retry_interval);
2140
1867
}
2142
1869
if (not quit_now){
2143
1870
exitcode = EXIT_SUCCESS;
2144
1871
}
2145
1872
2146
1873
goto end;
2147
1874
}
2148
1875
2170
1897
2171
1898
/* Check if creating the Avahi server object succeeded */
2172
1899
if(mc.server == NULL){
2173
fprintf(stderr, "Mandos plugin mandos-client: "
2174
"Failed to create Avahi server: %s\n",
1900
fprintf(stderr, "Failed to create Avahi server: %s\n",
2175
1901
avahi_strerror(error));
2176
1902
exitcode = EX_UNAVAILABLE;
2177
1903
goto end;
2186
1912
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2187
1913
NULL, 0, browse_callback, NULL);
2188
1914
if(sb == NULL){
2189
fprintf(stderr, "Mandos plugin mandos-client: "
2190
"Failed to create service browser: %s\n",
1915
fprintf(stderr, "Failed to create service browser: %s\n",
2191
1916
avahi_strerror(avahi_server_errno(mc.server)));
2192
1917
exitcode = EX_UNAVAILABLE;
2193
1918
goto end;
2200
1925
/* Run the main loop */
2201
1926
2202
1927
if(debug){
2203
fprintf(stderr, "Mandos plugin mandos-client: "
2204
"Starting Avahi loop search\n");
1928
fprintf(stderr, "Starting Avahi loop search\n");
2205
1929
}
2206
1930
2207
1931
ret = avahi_loop_with_timeout(mc.simple_poll,
2208
1932
(int)(retry_interval * 1000));
2209
1933
if(debug){
2210
fprintf(stderr, "Mandos plugin mandos-client: "
2211
"avahi_loop_with_timeout exited %s\n",
1934
fprintf(stderr, "avahi_loop_with_timeout exited %s\n",
2212
1935
(ret == 0) ? "successfully" : "with error");
2213
1936
}
2214
1937
2215
1938
end:
2216
1939
2217
1940
if(debug){
2218
fprintf(stderr, "Mandos plugin mandos-client: "
2219
"%s exiting\n", argv[0]);
1941
fprintf(stderr, "%s exiting\n", argv[0]);
2220
1942
}
2221
1943
2222
1944
/* Cleanup things */
2250
1972
}
2251
1973
}
2252
1974
2253
/* Re-raise priviliges */
2254
{
1975
/* Take down the network interface */
1976
if(take_down_interface){
1977
/* Re-raise priviliges */
2255
1978
errno = 0;
2256
1979
ret = seteuid(0);
2257
1980
if(ret == -1){
2258
1981
perror_plus("seteuid");
2259
1982
}
2260
/* Run network hooks */
2261
if(not run_network_hooks("stop", interface, delay)){
2262
goto end;
2263
}
2264
2265
/* Take down the network interface */
2266
if(take_down_interface and geteuid() == 0){
1983
if(geteuid() == 0){
2267
1984
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2268
1985
if(ret == -1){
2269
1986
perror_plus("ioctl SIOCGIFFLAGS");
2270
} else if(network.ifr_flags & IFF_UP){
1987
} else if(network.ifr_flags & IFF_UP) {
2271
1988
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2272
1989
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2273
1990
if(ret == -1){
2278
1995
if(ret == -1){
2279
1996
perror_plus("close");
2280
1997
}
1998
/* Lower privileges permanently */
1999
errno = 0;
2000
ret = setuid(uid);
2001
if(ret == -1){
2002
perror_plus("setuid");
2003
}
2281
2004
}
2282
2005
}
2283
/* Lower privileges permanently */
2284
errno = 0;
2285
ret = setuid(uid);
2286
if(ret == -1){
2287
perror_plus("setuid");
2288
}
2289
2006
2290
2007
/* Removes the GPGME temp directory and all files inside */
2291
2008
if(tempdir_created){
2305
2022
}
2306
2023
ret = remove(fullname);
2307
2024
if(ret == -1){
2308
fprintf(stderr, "Mandos plugin mandos-client: "
2309
"remove(\"%s\"): %s\n", fullname, strerror(errno));
2025
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
2026
strerror(errno));
2310
2027
}
2311
2028
free(fullname);
2312
2029
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0