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- Committer: Teddy Hogeborn
- Date: 2011-11-29 18:19:31 UTC
- mto: (505.2.13 mandos-client-network-hooks)
- mto: This revision was merged to the branch mainline in revision 525.
- Revision ID: teddy@recompile.se-20111129181931-vctlij1omtu1qbnx
* initramfs-tools-hook: Set DEVICE for network hooks.
- files added:
- network-hooks.d
- files modified:
- Makefile
added
removed
plugins.d/mandos-client.c
73
73
*/
74
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
75
getuid(), getgid(), seteuid(),
76
setgid(), pause() */
76
setgid(), pause(), _exit() */
77
77
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
78
78
#include <iso646.h> /* not, or, and */
79
79
#include <argp.h> /* struct argp_option, error_t, struct
87
87
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
88
88
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
89
89
WEXITSTATUS(), WTERMSIG() */
90
#include <grp.h> /* setgroups() */
90
91
91
92
#ifdef __linux__
92
93
#include <sys/klog.h> /* klogctl() */
174
175
perror(print_text);
175
176
}
176
177
178
int fprintf_plus(FILE *stream, const char *format, ...){
179
va_list ap;
180
va_start (ap, format);
181
182
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
183
program_invocation_short_name));
184
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
185
}
186
177
187
/*
178
188
* Make additional room in "buffer" for at least BUFFER_SIZE more
179
189
* bytes. "buffer_capacity" is how much is currently allocated,
253
263
254
264
rc = gpgme_data_new_from_fd(&pgp_data, fd);
255
265
if(rc != GPG_ERR_NO_ERROR){
256
fprintf(stderr, "Mandos plugin mandos-client: "
257
"bad gpgme_data_new_from_fd: %s: %s\n",
258
gpgme_strsource(rc), gpgme_strerror(rc));
266
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
267
gpgme_strsource(rc), gpgme_strerror(rc));
259
268
return false;
260
269
}
261
270
262
271
rc = gpgme_op_import(mc.ctx, pgp_data);
263
272
if(rc != GPG_ERR_NO_ERROR){
264
fprintf(stderr, "Mandos plugin mandos-client: "
265
"bad gpgme_op_import: %s: %s\n",
266
gpgme_strsource(rc), gpgme_strerror(rc));
273
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
274
gpgme_strsource(rc), gpgme_strerror(rc));
267
275
return false;
268
276
}
269
277
276
284
}
277
285
278
286
if(debug){
279
fprintf(stderr, "Mandos plugin mandos-client: "
280
"Initializing GPGME\n");
287
fprintf_plus(stderr, "Initializing GPGME\n");
281
288
}
282
289
283
290
/* Init GPGME */
284
291
gpgme_check_version(NULL);
285
292
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
286
293
if(rc != GPG_ERR_NO_ERROR){
287
fprintf(stderr, "Mandos plugin mandos-client: "
288
"bad gpgme_engine_check_version: %s: %s\n",
289
gpgme_strsource(rc), gpgme_strerror(rc));
294
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
295
gpgme_strsource(rc), gpgme_strerror(rc));
290
296
return false;
291
297
}
292
298
293
299
/* Set GPGME home directory for the OpenPGP engine only */
294
300
rc = gpgme_get_engine_info(&engine_info);
295
301
if(rc != GPG_ERR_NO_ERROR){
296
fprintf(stderr, "Mandos plugin mandos-client: "
297
"bad gpgme_get_engine_info: %s: %s\n",
298
gpgme_strsource(rc), gpgme_strerror(rc));
302
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
303
gpgme_strsource(rc), gpgme_strerror(rc));
299
304
return false;
300
305
}
301
306
while(engine_info != NULL){
307
312
engine_info = engine_info->next;
308
313
}
309
314
if(engine_info == NULL){
310
fprintf(stderr, "Mandos plugin mandos-client: "
311
"Could not set GPGME home dir to %s\n", tempdir);
315
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
316
tempdir);
312
317
return false;
313
318
}
314
319
315
320
/* Create new GPGME "context" */
316
321
rc = gpgme_new(&(mc.ctx));
317
322
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));
323
fprintf_plus(stderr, "Mandos plugin mandos-client: "
324
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
325
gpgme_strerror(rc));
321
326
return false;
322
327
}
323
328
342
347
ssize_t plaintext_length = 0;
343
348
344
349
if(debug){
345
fprintf(stderr, "Mandos plugin mandos-client: "
346
"Trying to decrypt OpenPGP data\n");
350
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
347
351
}
348
352
349
353
/* Create new GPGME data buffer from memory cryptotext */
350
354
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
351
355
0);
352
356
if(rc != GPG_ERR_NO_ERROR){
353
fprintf(stderr, "Mandos plugin mandos-client: "
354
"bad gpgme_data_new_from_mem: %s: %s\n",
355
gpgme_strsource(rc), gpgme_strerror(rc));
357
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
358
gpgme_strsource(rc), gpgme_strerror(rc));
356
359
return -1;
357
360
}
358
361
359
362
/* Create new empty GPGME data buffer for the plaintext */
360
363
rc = gpgme_data_new(&dh_plain);
361
364
if(rc != GPG_ERR_NO_ERROR){
362
fprintf(stderr, "Mandos plugin mandos-client: "
363
"bad gpgme_data_new: %s: %s\n",
364
gpgme_strsource(rc), gpgme_strerror(rc));
365
fprintf_plus(stderr, "Mandos plugin mandos-client: "
366
"bad gpgme_data_new: %s: %s\n",
367
gpgme_strsource(rc), gpgme_strerror(rc));
365
368
gpgme_data_release(dh_crypto);
366
369
return -1;
367
370
}
370
373
data buffer */
371
374
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
372
375
if(rc != GPG_ERR_NO_ERROR){
373
fprintf(stderr, "Mandos plugin mandos-client: "
374
"bad gpgme_op_decrypt: %s: %s\n",
375
gpgme_strsource(rc), gpgme_strerror(rc));
376
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
377
gpgme_strsource(rc), gpgme_strerror(rc));
376
378
plaintext_length = -1;
377
379
if(debug){
378
380
gpgme_decrypt_result_t result;
379
381
result = gpgme_op_decrypt_result(mc.ctx);
380
382
if(result == NULL){
381
fprintf(stderr, "Mandos plugin mandos-client: "
382
"gpgme_op_decrypt_result failed\n");
383
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
383
384
} else {
384
fprintf(stderr, "Mandos plugin mandos-client: "
385
"Unsupported algorithm: %s\n",
386
result->unsupported_algorithm);
387
fprintf(stderr, "Mandos plugin mandos-client: "
388
"Wrong key usage: %u\n",
389
result->wrong_key_usage);
385
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
386
result->unsupported_algorithm);
387
fprintf_plus(stderr, "Wrong key usage: %u\n",
388
result->wrong_key_usage);
390
389
if(result->file_name != NULL){
391
fprintf(stderr, "Mandos plugin mandos-client: "
392
"File name: %s\n", result->file_name);
390
fprintf_plus(stderr, "File name: %s\n", result->file_name);
393
391
}
394
392
gpgme_recipient_t recipient;
395
393
recipient = result->recipients;
396
394
while(recipient != NULL){
397
fprintf(stderr, "Mandos plugin mandos-client: "
398
"Public key algorithm: %s\n",
399
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",
404
recipient->status == GPG_ERR_NO_SECKEY
405
? "No" : "Yes");
395
fprintf_plus(stderr, "Public key algorithm: %s\n",
396
gpgme_pubkey_algo_name
397
(recipient->pubkey_algo));
398
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
399
fprintf_plus(stderr, "Secret key available: %s\n",
400
recipient->status == GPG_ERR_NO_SECKEY
401
? "No" : "Yes");
406
402
recipient = recipient->next;
407
403
}
408
404
}
411
407
}
412
408
413
409
if(debug){
414
fprintf(stderr, "Mandos plugin mandos-client: "
415
"Decryption of OpenPGP data succeeded\n");
410
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
416
411
}
417
412
418
413
/* Seek back to the beginning of the GPGME plaintext data buffer */
449
444
}
450
445
451
446
if(debug){
452
fprintf(stderr, "Mandos plugin mandos-client: "
453
"Decrypted password is: ");
447
fprintf_plus(stderr, "Decrypted password is: ");
454
448
for(ssize_t i = 0; i < plaintext_length; i++){
455
449
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
456
450
}
478
472
/* GnuTLS log function callback */
479
473
static void debuggnutls(__attribute__((unused)) int level,
480
474
const char* string){
481
fprintf(stderr, "Mandos plugin mandos-client: GnuTLS: %s", string);
475
fprintf_plus(stderr, "GnuTLS: %s", string);
482
476
}
483
477
484
478
static int init_gnutls_global(const char *pubkeyfilename,
486
480
int ret;
487
481
488
482
if(debug){
489
fprintf(stderr, "Mandos plugin mandos-client: "
490
"Initializing GnuTLS\n");
483
fprintf_plus(stderr, "Initializing GnuTLS\n");
491
484
}
492
485
493
486
ret = gnutls_global_init();
494
487
if(ret != GNUTLS_E_SUCCESS){
495
fprintf(stderr, "Mandos plugin mandos-client: "
496
"GnuTLS global_init: %s\n", safer_gnutls_strerror(ret));
488
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
489
safer_gnutls_strerror(ret));
497
490
return -1;
498
491
}
499
492
508
501
/* OpenPGP credentials */
509
502
ret = gnutls_certificate_allocate_credentials(&mc.cred);
510
503
if(ret != GNUTLS_E_SUCCESS){
511
fprintf(stderr, "Mandos plugin mandos-client: "
512
"GnuTLS memory error: %s\n", safer_gnutls_strerror(ret));
504
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
505
safer_gnutls_strerror(ret));
513
506
gnutls_global_deinit();
514
507
return -1;
515
508
}
516
509
517
510
if(debug){
518
fprintf(stderr, "Mandos plugin mandos-client: "
519
"Attempting to use OpenPGP public key %s and"
520
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
521
seckeyfilename);
511
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
512
" secret key %s as GnuTLS credentials\n",
513
pubkeyfilename,
514
seckeyfilename);
522
515
}
523
516
524
517
ret = gnutls_certificate_set_openpgp_key_file
525
518
(mc.cred, pubkeyfilename, seckeyfilename,
526
519
GNUTLS_OPENPGP_FMT_BASE64);
527
520
if(ret != GNUTLS_E_SUCCESS){
528
fprintf(stderr,
529
"Mandos plugin mandos-client: "
530
"Error[%d] while reading the OpenPGP key pair ('%s',"
531
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
532
fprintf(stderr, "Mandos plugin mandos-client: "
533
"The GnuTLS error is: %s\n", safer_gnutls_strerror(ret));
521
fprintf_plus(stderr,
522
"Error[%d] while reading the OpenPGP key pair ('%s',"
523
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
524
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
525
safer_gnutls_strerror(ret));
534
526
goto globalfail;
535
527
}
536
528
537
529
/* GnuTLS server initialization */
538
530
ret = gnutls_dh_params_init(&mc.dh_params);
539
531
if(ret != GNUTLS_E_SUCCESS){
540
fprintf(stderr, "Mandos plugin mandos-client: "
541
"Error in GnuTLS DH parameter initialization:"
542
" %s\n", safer_gnutls_strerror(ret));
532
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
533
" initialization: %s\n",
534
safer_gnutls_strerror(ret));
543
535
goto globalfail;
544
536
}
545
537
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
546
538
if(ret != GNUTLS_E_SUCCESS){
547
fprintf(stderr, "Mandos plugin mandos-client: "
548
"Error in GnuTLS prime generation: %s\n",
549
safer_gnutls_strerror(ret));
539
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
540
safer_gnutls_strerror(ret));
550
541
goto globalfail;
551
542
}
552
543
572
563
}
573
564
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
574
565
if(ret != GNUTLS_E_SUCCESS){
575
fprintf(stderr, "Mandos plugin mandos-client: "
576
"Error in GnuTLS session initialization: %s\n",
577
safer_gnutls_strerror(ret));
566
fprintf_plus(stderr,
567
"Error in GnuTLS session initialization: %s\n",
568
safer_gnutls_strerror(ret));
578
569
}
579
570
580
571
{
587
578
}
588
579
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
589
580
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));
581
fprintf_plus(stderr, "Syntax error at: %s\n", err);
582
fprintf_plus(stderr, "GnuTLS error: %s\n",
583
safer_gnutls_strerror(ret));
594
584
gnutls_deinit(*session);
595
585
return -1;
596
586
}
605
595
}
606
596
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
607
597
if(ret != GNUTLS_E_SUCCESS){
608
fprintf(stderr, "Mandos plugin mandos-client: "
609
"Error setting GnuTLS credentials: %s\n",
610
safer_gnutls_strerror(ret));
598
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
599
safer_gnutls_strerror(ret));
611
600
gnutls_deinit(*session);
612
601
return -1;
613
602
}
658
647
pf = PF_INET;
659
648
break;
660
649
default:
661
fprintf(stderr, "Mandos plugin mandos-client: "
662
"Bad address family: %d\n", af);
650
fprintf_plus(stderr, "Bad address family: %d\n", af);
663
651
errno = EINVAL;
664
652
return -1;
665
653
}
670
658
}
671
659
672
660
if(debug){
673
fprintf(stderr, "Mandos plugin mandos-client: "
674
"Setting up a TCP connection to %s, port %" PRIu16
675
"\n", ip, port);
661
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
662
PRIu16 "\n", ip, port);
676
663
}
677
664
678
665
tcp_sd = socket(pf, SOCK_STREAM, 0);
704
691
}
705
692
if(ret == 0){
706
693
int e = errno;
707
fprintf(stderr, "Mandos plugin mandos-client: "
708
"Bad address: %s\n", ip);
694
fprintf_plus(stderr, "Bad address: %s\n", ip);
709
695
errno = e;
710
696
goto mandos_end;
711
697
}
718
704
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
719
705
-Wunreachable-code*/
720
706
if(if_index == AVAHI_IF_UNSPEC){
721
fprintf(stderr, "Mandos plugin mandos-client: "
722
"An IPv6 link-local address is incomplete"
723
" without a network interface\n");
707
fprintf_plus(stderr, "An IPv6 link-local address is"
708
" incomplete without a network interface\n");
724
709
errno = EINVAL;
725
710
goto mandos_end;
726
711
}
744
729
if(if_indextoname((unsigned int)if_index, interface) == NULL){
745
730
perror_plus("if_indextoname");
746
731
} else {
747
fprintf(stderr, "Mandos plugin mandos-client: "
748
"Connection to: %s%%%s, port %" PRIu16 "\n",
749
ip, interface, port);
732
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
733
"\n", ip, interface, port);
750
734
}
751
735
} else {
752
fprintf(stderr, "Mandos plugin mandos-client: "
753
"Connection to: %s, port %" PRIu16 "\n", ip, port);
736
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
737
ip, port);
754
738
}
755
739
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
756
740
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
766
750
perror_plus("inet_ntop");
767
751
} else {
768
752
if(strcmp(addrstr, ip) != 0){
769
fprintf(stderr, "Mandos plugin mandos-client: "
770
"Canonical address form: %s\n", addrstr);
753
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
771
754
}
772
755
}
773
756
}
827
810
}
828
811
829
812
if(debug){
830
fprintf(stderr, "Mandos plugin mandos-client: "
831
"Establishing TLS session with %s\n", ip);
813
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
832
814
}
833
815
834
816
if(quit_now){
854
836
855
837
if(ret != GNUTLS_E_SUCCESS){
856
838
if(debug){
857
fprintf(stderr, "Mandos plugin mandos-client: "
858
"*** GnuTLS Handshake failed ***\n");
839
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
859
840
gnutls_perror(ret);
860
841
}
861
842
errno = EPROTO;
865
846
/* Read OpenPGP packet that contains the wanted password */
866
847
867
848
if(debug){
868
fprintf(stderr, "Mandos plugin mandos-client: "
869
"Retrieving OpenPGP encrypted password from %s\n", ip);
849
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
850
" %s\n", ip);
870
851
}
871
852
872
853
while(true){
910
891
}
911
892
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
912
893
if(ret < 0){
913
fprintf(stderr, "Mandos plugin mandos-client: "
914
"*** GnuTLS Re-handshake failed ***\n");
894
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
895
"***\n");
915
896
gnutls_perror(ret);
916
897
errno = EPROTO;
917
898
goto mandos_end;
918
899
}
919
900
break;
920
901
default:
921
fprintf(stderr, "Mandos plugin mandos-client: "
922
"Unknown error while reading data from"
923
" encrypted session with Mandos server\n");
902
fprintf_plus(stderr, "Unknown error while reading data from"
903
" encrypted session with Mandos server\n");
924
904
gnutls_bye(session, GNUTLS_SHUT_RDWR);
925
905
errno = EIO;
926
906
goto mandos_end;
931
911
}
932
912
933
913
if(debug){
934
fprintf(stderr, "Mandos plugin mandos-client: "
935
"Closing TLS session\n");
914
fprintf_plus(stderr, "Closing TLS session\n");
936
915
}
937
916
938
917
if(quit_now){
967
946
if(ret == 0 and ferror(stdout)){
968
947
int e = errno;
969
948
if(debug){
970
fprintf(stderr, "Mandos plugin mandos-client: "
971
"Error writing encrypted data: %s\n",
972
strerror(errno));
949
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
950
strerror(errno));
973
951
}
974
952
errno = e;
975
953
goto mandos_end;
1032
1010
switch(event){
1033
1011
default:
1034
1012
case AVAHI_RESOLVER_FAILURE:
1035
fprintf(stderr, "Mandos plugin mandos-client: "
1036
"(Avahi Resolver) Failed to resolve service '%s'"
1037
" of type '%s' in domain '%s': %s\n", name, type, domain,
1038
avahi_strerror(avahi_server_errno(mc.server)));
1013
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1014
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1015
domain,
1016
avahi_strerror(avahi_server_errno(mc.server)));
1039
1017
break;
1040
1018
1041
1019
case AVAHI_RESOLVER_FOUND:
1043
1021
char ip[AVAHI_ADDRESS_STR_MAX];
1044
1022
avahi_address_snprint(ip, sizeof(ip), address);
1045
1023
if(debug){
1046
fprintf(stderr, "Mandos plugin mandos-client: "
1047
"Mandos server \"%s\" found on %s (%s, %"
1048
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
1049
ip, (intmax_t)interface, port);
1024
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1025
PRIdMAX ") on port %" PRIu16 "\n", name,
1026
host_name, ip, (intmax_t)interface, port);
1050
1027
}
1051
1028
int ret = start_mandos_communication(ip, port, interface,
1052
1029
avahi_proto_to_af(proto));
1084
1061
default:
1085
1062
case AVAHI_BROWSER_FAILURE:
1086
1063
1087
fprintf(stderr, "Mandos plugin mandos-client: "
1088
"(Avahi browser) %s\n",
1089
avahi_strerror(avahi_server_errno(mc.server)));
1064
fprintf_plus(stderr, "(Avahi browser) %s\n",
1065
avahi_strerror(avahi_server_errno(mc.server)));
1090
1066
avahi_simple_poll_quit(mc.simple_poll);
1091
1067
return;
1092
1068
1099
1075
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1100
1076
name, type, domain, protocol, 0,
1101
1077
resolve_callback, NULL) == NULL)
1102
fprintf(stderr, "Mandos plugin mandos-client: "
1103
"Avahi: Failed to resolve service '%s': %s\n",
1104
name, avahi_strerror(avahi_server_errno(mc.server)));
1078
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1079
" %s\n", name,
1080
avahi_strerror(avahi_server_errno(mc.server)));
1105
1081
break;
1106
1082
1107
1083
case AVAHI_BROWSER_REMOVE:
1110
1086
case AVAHI_BROWSER_ALL_FOR_NOW:
1111
1087
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1112
1088
if(debug){
1113
fprintf(stderr, "Mandos plugin mandos-client: "
1114
"No Mandos server found, still searching...\n");
1089
fprintf_plus(stderr, "No Mandos server found, still"
1090
" searching...\n");
1115
1091
}
1116
1092
break;
1117
1093
}
1156
1132
/* Reject the loopback device */
1157
1133
if(ifr->ifr_flags & IFF_LOOPBACK){
1158
1134
if(debug){
1159
fprintf(stderr, "Mandos plugin mandos-client: "
1160
"Rejecting loopback interface \"%s\"\n", ifname);
1135
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1136
ifname);
1161
1137
}
1162
1138
return false;
1163
1139
}
1164
1140
/* Accept point-to-point devices only if connect_to is specified */
1165
1141
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1166
1142
if(debug){
1167
fprintf(stderr, "Mandos plugin mandos-client: "
1168
"Accepting point-to-point interface \"%s\"\n", ifname);
1143
fprintf_plus(stderr, "Accepting point-to-point interface"
1144
" \"%s\"\n", ifname);
1169
1145
}
1170
1146
return true;
1171
1147
}
1172
1148
/* Otherwise, reject non-broadcast-capable devices */
1173
1149
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1174
1150
if(debug){
1175
fprintf(stderr, "Mandos plugin mandos-client: "
1176
"Rejecting non-broadcast interface \"%s\"\n", ifname);
1151
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1152
" \"%s\"\n", ifname);
1177
1153
}
1178
1154
return false;
1179
1155
}
1180
1156
/* Reject non-ARP interfaces (including dummy interfaces) */
1181
1157
if(ifr->ifr_flags & IFF_NOARP){
1182
1158
if(debug){
1183
fprintf(stderr, "Mandos plugin mandos-client: "
1184
"Rejecting non-ARP interface \"%s\"\n", ifname);
1159
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1160
ifname);
1185
1161
}
1186
1162
return false;
1187
1163
}
1188
1164
1189
1165
/* Accept this device */
1190
1166
if(debug){
1191
fprintf(stderr, "Mandos plugin mandos-client: "
1192
"Interface \"%s\" is good\n", ifname);
1167
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1193
1168
}
1194
1169
return true;
1195
1170
}
1207
1182
struct ifreq ifr;
1208
1183
if(not get_flags(if_entry->d_name, &ifr)){
1209
1184
if(debug){
1210
fprintf(stderr, "Mandos plugin mandos-client: "
1211
"Failed to get flags for interface \"%s\"\n",
1212
if_entry->d_name);
1185
fprintf_plus(stderr, "Failed to get flags for interface "
1186
"\"%s\"\n", if_entry->d_name);
1213
1187
}
1214
1188
return 0;
1215
1189
}
1233
1207
struct ifreq ifr;
1234
1208
if(not get_flags(if_entry->d_name, &ifr)){
1235
1209
if(debug){
1236
fprintf(stderr, "Mandos plugin mandos-client: "
1237
"Failed to get flags for interface \"%s\"\n",
1238
if_entry->d_name);
1210
fprintf_plus(stderr, "Failed to get flags for interface "
1211
"\"%s\"\n", if_entry->d_name);
1239
1212
}
1240
1213
return 0;
1241
1214
}
1243
1216
/* Reject down interfaces */
1244
1217
if(not (ifr.ifr_flags & IFF_UP)){
1245
1218
if(debug){
1246
fprintf(stderr, "Mandos plugin mandos-client: "
1247
"Rejecting down interface \"%s\"\n",
1248
if_entry->d_name);
1219
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1220
if_entry->d_name);
1249
1221
}
1250
1222
return 0;
1251
1223
}
1253
1225
/* Reject non-running interfaces */
1254
1226
if(not (ifr.ifr_flags & IFF_RUNNING)){
1255
1227
if(debug){
1256
fprintf(stderr, "Mandos plugin mandos-client: "
1257
"Rejecting non-running interface \"%s\"\n",
1258
if_entry->d_name);
1228
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1229
if_entry->d_name);
1259
1230
}
1260
1231
return 0;
1261
1232
}
1295
1266
if((direntry->d_name)[sret] != '\0'){
1296
1267
/* Contains non-allowed characters */
1297
1268
if(debug){
1298
fprintf(stderr, "Mandos plugin mandos-client: "
1299
"Ignoring hook \"%s\" with bad name\n",
1300
direntry->d_name);
1269
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1270
direntry->d_name);
1301
1271
}
1302
1272
return 0;
1303
1273
}
1319
1289
if(not (S_ISREG(st.st_mode))){
1320
1290
/* Not a regular file */
1321
1291
if(debug){
1322
fprintf(stderr, "Mandos plugin mandos-client: "
1323
"Ignoring hook \"%s\" - not a file\n",
1324
direntry->d_name);
1292
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1293
direntry->d_name);
1325
1294
}
1326
1295
return 0;
1327
1296
}
1328
1297
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1329
1298
/* Not executable */
1330
1299
if(debug){
1331
fprintf(stderr, "Mandos plugin mandos-client: "
1332
"Ignoring hook \"%s\" - not executable\n",
1333
direntry->d_name);
1300
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1301
direntry->d_name);
1334
1302
}
1335
1303
return 0;
1336
1304
}
1305
if(debug){
1306
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1307
direntry->d_name);
1308
}
1337
1309
return 1;
1338
1310
}
1339
1311
1346
1318
while(true){
1347
1319
if(mc.current_server == NULL){
1348
1320
if (debug){
1349
fprintf(stderr, "Mandos plugin mandos-client: "
1350
"Wait until first server is found. No timeout!\n");
1321
fprintf_plus(stderr, "Wait until first server is found."
1322
" No timeout!\n");
1351
1323
}
1352
1324
ret = avahi_simple_poll_iterate(s, -1);
1353
1325
} else {
1354
1326
if (debug){
1355
fprintf(stderr, "Mandos plugin mandos-client: "
1356
"Check current_server if we should run it,"
1357
" or wait\n");
1327
fprintf_plus(stderr, "Check current_server if we should run"
1328
" it, or wait\n");
1358
1329
}
1359
1330
/* the current time */
1360
1331
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1376
1347
- ((intmax_t)waited_time.tv_nsec / 1000000));
1377
1348
1378
1349
if (debug){
1379
fprintf(stderr, "Mandos plugin mandos-client: "
1380
"Blocking for %" PRIdMAX " ms\n", block_time);
1350
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1351
block_time);
1381
1352
}
1382
1353
1383
1354
if(block_time <= 0){
1410
1381
}
1411
1382
}
1412
1383
1384
bool run_network_hooks(const char *mode, const char *interface,
1385
const float delay){
1386
struct dirent **direntries;
1387
struct dirent *direntry;
1388
int ret;
1389
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1390
alphasort);
1391
if(numhooks == -1){
1392
perror_plus("scandir");
1393
} else {
1394
int devnull = open("/dev/null", O_RDONLY);
1395
for(int i = 0; i < numhooks; i++){
1396
direntry = direntries[i];
1397
char *fullname = NULL;
1398
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1399
if(ret < 0){
1400
perror_plus("asprintf");
1401
continue;
1402
}
1403
if(debug){
1404
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1405
direntry->d_name);
1406
}
1407
pid_t hook_pid = fork();
1408
if(hook_pid == 0){
1409
/* Child */
1410
/* Raise privileges */
1411
errno = 0;
1412
ret = seteuid(0);
1413
if(ret == -1){
1414
perror_plus("seteuid");
1415
}
1416
/* Raise privileges even more */
1417
errno = 0;
1418
ret = setuid(0);
1419
if(ret == -1){
1420
perror_plus("setuid");
1421
}
1422
/* Set group */
1423
errno = 0;
1424
ret = setgid(0);
1425
if(ret == -1){
1426
perror_plus("setgid");
1427
}
1428
/* Reset supplementary groups */
1429
errno = 0;
1430
ret = setgroups(0, NULL);
1431
if(ret == -1){
1432
perror_plus("setgroups");
1433
}
1434
dup2(devnull, STDIN_FILENO);
1435
close(devnull);
1436
dup2(STDERR_FILENO, STDOUT_FILENO);
1437
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1438
if(ret == -1){
1439
perror_plus("setenv");
1440
_exit(EX_OSERR);
1441
}
1442
ret = setenv("DEVICE", interface, 1);
1443
if(ret == -1){
1444
perror_plus("setenv");
1445
_exit(EX_OSERR);
1446
}
1447
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1448
if(ret == -1){
1449
perror_plus("setenv");
1450
_exit(EX_OSERR);
1451
}
1452
ret = setenv("MODE", mode, 1);
1453
if(ret == -1){
1454
perror_plus("setenv");
1455
_exit(EX_OSERR);
1456
}
1457
char *delaystring;
1458
ret = asprintf(&delaystring, "%f", delay);
1459
if(ret == -1){
1460
perror_plus("asprintf");
1461
_exit(EX_OSERR);
1462
}
1463
ret = setenv("DELAY", delaystring, 1);
1464
if(ret == -1){
1465
free(delaystring);
1466
perror_plus("setenv");
1467
_exit(EX_OSERR);
1468
}
1469
free(delaystring);
1470
ret = execl(fullname, direntry->d_name, mode, NULL);
1471
perror_plus("execl");
1472
} else {
1473
int status;
1474
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1475
perror_plus("waitpid");
1476
free(fullname);
1477
continue;
1478
}
1479
if(WIFEXITED(status)){
1480
if(WEXITSTATUS(status) != 0){
1481
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1482
" with status %d\n", direntry->d_name,
1483
WEXITSTATUS(status));
1484
free(fullname);
1485
continue;
1486
}
1487
} else if(WIFSIGNALED(status)){
1488
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1489
" signal %d\n", direntry->d_name,
1490
WTERMSIG(status));
1491
free(fullname);
1492
continue;
1493
} else {
1494
fprintf_plus(stderr, "Warning: network hook \"%s\""
1495
" crashed\n", direntry->d_name);
1496
free(fullname);
1497
continue;
1498
}
1499
}
1500
free(fullname);
1501
if(debug){
1502
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1503
direntry->d_name);
1504
}
1505
}
1506
close(devnull);
1507
}
1508
return true;
1509
}
1510
1413
1511
int main(int argc, char *argv[]){
1414
1512
AvahiSServiceBrowser *sb = NULL;
1415
1513
int error;
1573
1671
argp_state_help(state, state->out_stream,
1574
1672
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1575
1673
case 'V': /* --version */
1576
fprintf(state->out_stream, "Mandos plugin mandos-client: ");
1577
fprintf(state->out_stream, "%s\n", argp_program_version);
1674
fprintf_plus(state->out_stream,
1675
"Mandos plugin mandos-client: ");
1676
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1578
1677
exit(argp_err_exit_status);
1579
1678
break;
1580
1679
default:
1607
1706
{
1608
1707
/* Work around Debian bug #633582:
1609
1708
<http://bugs.debian.org/633582> */
1610
struct stat st;
1611
1709
1612
1710
/* Re-raise priviliges */
1613
1711
errno = 0;
1614
1712
ret = seteuid(0);
1615
1713
if(ret == -1){
1616
1714
perror_plus("seteuid");
1617
}
1618
1619
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1620
int seckey_fd = open(seckey, O_RDONLY);
1621
if(seckey_fd == -1){
1622
perror_plus("open");
1623
} else {
1624
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1625
if(ret == -1){
1626
perror_plus("fstat");
1627
} else {
1628
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1629
ret = fchown(seckey_fd, uid, gid);
1630
if(ret == -1){
1631
perror_plus("fchown");
1632
}
1633
}
1634
}
1635
TEMP_FAILURE_RETRY(close(seckey_fd));
1636
}
1637
}
1638
1639
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1640
int pubkey_fd = open(pubkey, O_RDONLY);
1641
if(pubkey_fd == -1){
1642
perror_plus("open");
1643
} else {
1644
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1645
if(ret == -1){
1646
perror_plus("fstat");
1647
} else {
1648
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1649
ret = fchown(pubkey_fd, uid, gid);
1650
if(ret == -1){
1651
perror_plus("fchown");
1652
}
1653
}
1654
}
1655
TEMP_FAILURE_RETRY(close(pubkey_fd));
1656
}
1657
}
1658
1659
/* Lower privileges */
1660
errno = 0;
1661
ret = seteuid(uid);
1662
if(ret == -1){
1663
perror_plus("seteuid");
1664
}
1665
}
1666
1667
/* Find network hooks and run them */
1668
{
1669
struct dirent **direntries;
1670
struct dirent *direntry;
1671
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1672
alphasort);
1673
if(numhooks == -1){
1674
perror_plus("scandir");
1675
1715
} else {
1676
int devnull = open("/dev/null", O_RDONLY);
1677
for(int i = 0; i < numhooks; i++){
1678
direntry = direntries[0];
1679
char *fullname = NULL;
1680
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1681
if(ret < 0){
1682
perror_plus("asprintf");
1683
continue;
1684
}
1685
pid_t hook_pid = fork();
1686
if(hook_pid == 0){
1687
/* Child */
1688
dup2(devnull, STDIN_FILENO);
1689
close(devnull);
1690
dup2(STDERR_FILENO, STDOUT_FILENO);
1691
ret = setenv("DEVICE", interface, 1);
1692
if(ret == -1){
1693
perror_plus("setenv");
1694
exit(1);
1695
}
1696
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1697
if(ret == -1){
1698
perror_plus("setenv");
1699
exit(1);
1700
}
1701
ret = setenv("MODE", "start", 1);
1702
if(ret == -1){
1703
perror_plus("setenv");
1704
exit(1);
1705
}
1706
char *delaystring;
1707
ret = asprintf(&delaystring, "%f", delay);
1708
if(ret == -1){
1709
perror_plus("asprintf");
1710
exit(1);
1711
}
1712
ret = setenv("DELAY", delaystring, 1);
1713
if(ret == -1){
1714
free(delaystring);
1715
perror_plus("setenv");
1716
exit(1);
1717
}
1718
free(delaystring);
1719
ret = execl(fullname, direntry->d_name, "start", NULL);
1720
perror_plus("execl");
1721
} else {
1722
int status;
1723
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1724
perror_plus("waitpid");
1725
free(fullname);
1726
continue;
1727
}
1728
if(WIFEXITED(status)){
1729
if(WEXITSTATUS(status) != 0){
1730
fprintf(stderr, "Mandos plugin mandos-client: "
1731
"Warning: network hook \"%s\" exited"
1732
" with status %d\n", direntry->d_name,
1733
WEXITSTATUS(status));
1734
free(fullname);
1735
continue;
1736
}
1737
} else if(WIFSIGNALED(status)){
1738
fprintf(stderr, "Mandos plugin mandos-client: "
1739
"Warning: network hook \"%s\" died by"
1740
" signal %d\n", direntry->d_name,
1741
WTERMSIG(status));
1742
free(fullname);
1743
continue;
1744
} else {
1745
fprintf(stderr, "Mandos plugin mandos-client: "
1746
"Warning: network hook \"%s\" crashed\n",
1747
direntry->d_name);
1748
free(fullname);
1749
continue;
1750
}
1751
}
1752
free(fullname);
1753
if(quit_now){
1754
goto end;
1755
}
1756
}
1757
close(devnull);
1716
struct stat st;
1717
1718
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1719
int seckey_fd = open(seckey, O_RDONLY);
1720
if(seckey_fd == -1){
1721
perror_plus("open");
1722
} else {
1723
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1724
if(ret == -1){
1725
perror_plus("fstat");
1726
} else {
1727
if(S_ISREG(st.st_mode)
1728
and st.st_uid == 0 and st.st_gid == 0){
1729
ret = fchown(seckey_fd, uid, gid);
1730
if(ret == -1){
1731
perror_plus("fchown");
1732
}
1733
}
1734
}
1735
TEMP_FAILURE_RETRY(close(seckey_fd));
1736
}
1737
}
1738
1739
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1740
int pubkey_fd = open(pubkey, O_RDONLY);
1741
if(pubkey_fd == -1){
1742
perror_plus("open");
1743
} else {
1744
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1745
if(ret == -1){
1746
perror_plus("fstat");
1747
} else {
1748
if(S_ISREG(st.st_mode)
1749
and st.st_uid == 0 and st.st_gid == 0){
1750
ret = fchown(pubkey_fd, uid, gid);
1751
if(ret == -1){
1752
perror_plus("fchown");
1753
}
1754
}
1755
}
1756
TEMP_FAILURE_RETRY(close(pubkey_fd));
1757
}
1758
}
1759
1760
/* Lower privileges */
1761
errno = 0;
1762
ret = seteuid(uid);
1763
if(ret == -1){
1764
perror_plus("seteuid");
1765
}
1758
1766
}
1759
1767
}
1760
1768
1769
/* Run network hooks */
1770
if(not run_network_hooks("start", interface, delay)){
1771
goto end;
1772
}
1773
1761
1774
if(not debug){
1762
1775
avahi_set_log_function(empty_log);
1763
1776
}
1777
1790
/* Pick the first interface returned */
1778
1791
interface = strdup(direntries[0]->d_name);
1779
1792
if(debug){
1780
fprintf(stderr, "Mandos plugin mandos-client: "
1781
"Using interface \"%s\"\n", interface);
1793
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1782
1794
}
1783
1795
if(interface == NULL){
1784
1796
perror_plus("malloc");
1789
1801
free(direntries);
1790
1802
} else {
1791
1803
free(direntries);
1792
fprintf(stderr, "Mandos plugin mandos-client: "
1793
"Could not find a network interface\n");
1804
fprintf_plus(stderr, "Could not find a network interface\n");
1794
1805
exitcode = EXIT_FAILURE;
1795
1806
goto end;
1796
1807
}
1802
1813
srand((unsigned int) time(NULL));
1803
1814
mc.simple_poll = avahi_simple_poll_new();
1804
1815
if(mc.simple_poll == NULL){
1805
fprintf(stderr, "Mandos plugin mandos-client: "
1806
"Avahi: Failed to create simple poll object.\n");
1816
fprintf_plus(stderr,
1817
"Avahi: Failed to create simple poll object.\n");
1807
1818
exitcode = EX_UNAVAILABLE;
1808
1819
goto end;
1809
1820
}
1875
1886
if(strcmp(interface, "none") != 0){
1876
1887
if_index = (AvahiIfIndex) if_nametoindex(interface);
1877
1888
if(if_index == 0){
1878
fprintf(stderr, "Mandos plugin mandos-client: "
1879
"No such interface: \"%s\"\n", interface);
1889
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1880
1890
exitcode = EX_UNAVAILABLE;
1881
1891
goto end;
1882
1892
}
2002
2012
#endif /* __linux__ */
2003
2013
/* Lower privileges */
2004
2014
errno = 0;
2005
if(take_down_interface){
2006
/* Lower privileges */
2007
ret = seteuid(uid);
2008
if(ret == -1){
2009
perror_plus("seteuid");
2010
}
2011
} else {
2012
/* Lower privileges permanently */
2013
ret = setuid(uid);
2014
if(ret == -1){
2015
perror_plus("setuid");
2016
}
2015
/* Lower privileges */
2016
ret = seteuid(uid);
2017
if(ret == -1){
2018
perror_plus("seteuid");
2017
2019
}
2018
2020
}
2019
2021
2023
2025
2024
2026
ret = init_gnutls_global(pubkey, seckey);
2025
2027
if(ret == -1){
2026
fprintf(stderr, "Mandos plugin mandos-client: "
2027
"init_gnutls_global failed\n");
2028
fprintf_plus(stderr, "init_gnutls_global failed\n");
2028
2029
exitcode = EX_UNAVAILABLE;
2029
2030
goto end;
2030
2031
} else {
2046
2047
}
2047
2048
2048
2049
if(not init_gpgme(pubkey, seckey, tempdir)){
2049
fprintf(stderr, "Mandos plugin mandos-client: "
2050
"init_gpgme failed\n");
2050
fprintf_plus(stderr, "init_gpgme failed\n");
2051
2051
exitcode = EX_UNAVAILABLE;
2052
2052
goto end;
2053
2053
} else {
2063
2063
/* (Mainly meant for debugging) */
2064
2064
char *address = strrchr(connect_to, ':');
2065
2065
if(address == NULL){
2066
fprintf(stderr, "Mandos plugin mandos-client: "
2067
"No colon in address\n");
2066
fprintf_plus(stderr, "No colon in address\n");
2068
2067
exitcode = EX_USAGE;
2069
2068
goto end;
2070
2069
}
2078
2077
tmpmax = strtoimax(address+1, &tmp, 10);
2079
2078
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2080
2079
or tmpmax != (uint16_t)tmpmax){
2081
fprintf(stderr, "Mandos plugin mandos-client: "
2082
"Bad port number\n");
2080
fprintf_plus(stderr, "Bad port number\n");
2083
2081
exitcode = EX_USAGE;
2084
2082
goto end;
2085
2083
}
2115
2113
break;
2116
2114
}
2117
2115
if(debug){
2118
fprintf(stderr, "Mandos plugin mandos-client: "
2119
"Retrying in %d seconds\n", (int)retry_interval);
2116
fprintf_plus(stderr, "Retrying in %d seconds\n",
2117
(int)retry_interval);
2120
2118
}
2121
2119
sleep((int)retry_interval);
2122
2120
}
2152
2150
2153
2151
/* Check if creating the Avahi server object succeeded */
2154
2152
if(mc.server == NULL){
2155
fprintf(stderr, "Mandos plugin mandos-client: "
2156
"Failed to create Avahi server: %s\n",
2157
avahi_strerror(error));
2153
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2154
avahi_strerror(error));
2158
2155
exitcode = EX_UNAVAILABLE;
2159
2156
goto end;
2160
2157
}
2168
2165
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2169
2166
NULL, 0, browse_callback, NULL);
2170
2167
if(sb == NULL){
2171
fprintf(stderr, "Mandos plugin mandos-client: "
2172
"Failed to create service browser: %s\n",
2173
avahi_strerror(avahi_server_errno(mc.server)));
2168
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2169
avahi_strerror(avahi_server_errno(mc.server)));
2174
2170
exitcode = EX_UNAVAILABLE;
2175
2171
goto end;
2176
2172
}
2182
2178
/* Run the main loop */
2183
2179
2184
2180
if(debug){
2185
fprintf(stderr, "Mandos plugin mandos-client: "
2186
"Starting Avahi loop search\n");
2181
fprintf_plus(stderr, "Starting Avahi loop search\n");
2187
2182
}
2188
2183
2189
2184
ret = avahi_loop_with_timeout(mc.simple_poll,
2190
2185
(int)(retry_interval * 1000));
2191
2186
if(debug){
2192
fprintf(stderr, "Mandos plugin mandos-client: "
2193
"avahi_loop_with_timeout exited %s\n",
2194
(ret == 0) ? "successfully" : "with error");
2187
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2188
(ret == 0) ? "successfully" : "with error");
2195
2189
}
2196
2190
2197
2191
end:
2198
2192
2199
2193
if(debug){
2200
fprintf(stderr, "Mandos plugin mandos-client: "
2201
"%s exiting\n", argv[0]);
2194
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2202
2195
}
2203
2196
2204
2197
/* Cleanup things */
2220
2213
if(gpgme_initialized){
2221
2214
gpgme_release(mc.ctx);
2222
2215
}
2223
2216
2224
2217
/* Cleans up the circular linked list of Mandos servers the client
2225
2218
has seen */
2226
2219
if(mc.current_server != NULL){
2232
2225
}
2233
2226
}
2234
2227
2235
/* XXX run network hooks "stop" here */
2228
/* Run network hooks */
2229
run_network_hooks("stop", interface, delay);
2236
2230
2237
/* Take down the network interface */
2238
if(take_down_interface){
2239
/* Re-raise priviliges */
2231
/* Re-raise priviliges */
2232
{
2240
2233
errno = 0;
2241
2234
ret = seteuid(0);
2242
2235
if(ret == -1){
2243
2236
perror_plus("seteuid");
2244
2237
}
2245
if(geteuid() == 0){
2238
2239
/* Take down the network interface */
2240
if(take_down_interface and geteuid() == 0){
2246
2241
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2247
2242
if(ret == -1){
2248
2243
perror_plus("ioctl SIOCGIFFLAGS");
2257
2252
if(ret == -1){
2258
2253
perror_plus("close");
2259
2254
}
2260
/* Lower privileges permanently */
2261
errno = 0;
2262
ret = setuid(uid);
2263
if(ret == -1){
2264
perror_plus("setuid");
2265
}
2266
2255
}
2267
2256
}
2257
/* Lower privileges permanently */
2258
errno = 0;
2259
ret = setuid(uid);
2260
if(ret == -1){
2261
perror_plus("setuid");
2262
}
2268
2263
2269
2264
/* Removes the GPGME temp directory and all files inside */
2270
2265
if(tempdir_created){
2284
2279
}
2285
2280
ret = remove(fullname);
2286
2281
if(ret == -1){
2287
fprintf(stderr, "Mandos plugin mandos-client: "
2288
"remove(\"%s\"): %s\n", fullname, strerror(errno));
2282
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2283
strerror(errno));
2289
2284
}
2290
2285
free(fullname);
2291
2286
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0