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- Committer: teddy at bsnet
- Date: 2011-11-12 16:24:19 UTC
- mto: (505.2.5 mandos-client-network-hooks)
- mto: This revision was merged to the branch mainline in revision 525.
- Revision ID: teddy@fukt.bsnet.se-20111112162419-pe83skogsctxuzw7
* plugins.d/mandos-client.c: Prefix all printouts with "Mandos plugin
mandos-client: ".
* plugins.d/mandos-client.c (main): Wait for network hooks and check
the completion status.
mandos-client: ".
* plugins.d/mandos-client.c (main): Wait for network hooks and check
the completion status.
- files added:
- debian/source/local-options
- files modified:
- DBUS-API
added
removed
plugins.d/mandos-client.c
26
26
* along with this program. If not, see
27
27
* <http://www.gnu.org/licenses/>.
28
28
*
29
* Contact the authors at <mandos@fukt.bsnet.se>.
29
* Contact the authors at <mandos@recompile.se>.
30
30
*/
31
31
32
32
/* Needed by GPGME, specifically gpgme_data_seek() */
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() */
56
#include <sys/stat.h> /* open(), S_ISREG */
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() */
88
90
89
91
#ifdef __linux__
90
92
#include <sys/klog.h> /* klogctl() */
123
125
#define PATHDIR "/conf/conf.d/mandos"
124
126
#define SECKEY "seckey.txt"
125
127
#define PUBKEY "pubkey.txt"
128
#define HOOKDIR "/lib/mandos/network-hooks.d"
126
129
127
130
bool debug = false;
128
131
static const char mandos_protocol_version[] = "1";
129
132
const char *argp_program_version = "mandos-client " VERSION;
130
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
133
const char *argp_program_bug_address = "<mandos@recompile.se>";
131
134
static const char sys_class_net[] = "/sys/class/net";
132
135
char *connect_to = NULL;
133
136
250
253
251
254
rc = gpgme_data_new_from_fd(&pgp_data, fd);
252
255
if(rc != GPG_ERR_NO_ERROR){
253
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
256
fprintf(stderr, "Mandos plugin mandos-client: "
257
"bad gpgme_data_new_from_fd: %s: %s\n",
254
258
gpgme_strsource(rc), gpgme_strerror(rc));
255
259
return false;
256
260
}
257
261
258
262
rc = gpgme_op_import(mc.ctx, pgp_data);
259
263
if(rc != GPG_ERR_NO_ERROR){
260
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
264
fprintf(stderr, "Mandos plugin mandos-client: "
265
"bad gpgme_op_import: %s: %s\n",
261
266
gpgme_strsource(rc), gpgme_strerror(rc));
262
267
return false;
263
268
}
271
276
}
272
277
273
278
if(debug){
274
fprintf(stderr, "Initializing GPGME\n");
279
fprintf(stderr, "Mandos plugin mandos-client: "
280
"Initializing GPGME\n");
275
281
}
276
282
277
283
/* Init GPGME */
278
284
gpgme_check_version(NULL);
279
285
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
280
286
if(rc != GPG_ERR_NO_ERROR){
281
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
287
fprintf(stderr, "Mandos plugin mandos-client: "
288
"bad gpgme_engine_check_version: %s: %s\n",
282
289
gpgme_strsource(rc), gpgme_strerror(rc));
283
290
return false;
284
291
}
286
293
/* Set GPGME home directory for the OpenPGP engine only */
287
294
rc = gpgme_get_engine_info(&engine_info);
288
295
if(rc != GPG_ERR_NO_ERROR){
289
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
296
fprintf(stderr, "Mandos plugin mandos-client: "
297
"bad gpgme_get_engine_info: %s: %s\n",
290
298
gpgme_strsource(rc), gpgme_strerror(rc));
291
299
return false;
292
300
}
299
307
engine_info = engine_info->next;
300
308
}
301
309
if(engine_info == NULL){
302
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
310
fprintf(stderr, "Mandos plugin mandos-client: "
311
"Could not set GPGME home dir to %s\n", tempdir);
303
312
return false;
304
313
}
305
314
306
315
/* Create new GPGME "context" */
307
316
rc = gpgme_new(&(mc.ctx));
308
317
if(rc != GPG_ERR_NO_ERROR){
309
fprintf(stderr, "bad gpgme_new: %s: %s\n",
310
gpgme_strsource(rc), gpgme_strerror(rc));
318
fprintf(stderr, "Mandos plugin mandos-client: "
319
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
320
gpgme_strerror(rc));
311
321
return false;
312
322
}
313
323
332
342
ssize_t plaintext_length = 0;
333
343
334
344
if(debug){
335
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
345
fprintf(stderr, "Mandos plugin mandos-client: "
346
"Trying to decrypt OpenPGP data\n");
336
347
}
337
348
338
349
/* Create new GPGME data buffer from memory cryptotext */
339
350
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
340
351
0);
341
352
if(rc != GPG_ERR_NO_ERROR){
342
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
353
fprintf(stderr, "Mandos plugin mandos-client: "
354
"bad gpgme_data_new_from_mem: %s: %s\n",
343
355
gpgme_strsource(rc), gpgme_strerror(rc));
344
356
return -1;
345
357
}
347
359
/* Create new empty GPGME data buffer for the plaintext */
348
360
rc = gpgme_data_new(&dh_plain);
349
361
if(rc != GPG_ERR_NO_ERROR){
350
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
362
fprintf(stderr, "Mandos plugin mandos-client: "
363
"bad gpgme_data_new: %s: %s\n",
351
364
gpgme_strsource(rc), gpgme_strerror(rc));
352
365
gpgme_data_release(dh_crypto);
353
366
return -1;
357
370
data buffer */
358
371
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
359
372
if(rc != GPG_ERR_NO_ERROR){
360
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
373
fprintf(stderr, "Mandos plugin mandos-client: "
374
"bad gpgme_op_decrypt: %s: %s\n",
361
375
gpgme_strsource(rc), gpgme_strerror(rc));
362
376
plaintext_length = -1;
363
377
if(debug){
364
378
gpgme_decrypt_result_t result;
365
379
result = gpgme_op_decrypt_result(mc.ctx);
366
380
if(result == NULL){
367
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
381
fprintf(stderr, "Mandos plugin mandos-client: "
382
"gpgme_op_decrypt_result failed\n");
368
383
} else {
369
fprintf(stderr, "Unsupported algorithm: %s\n",
384
fprintf(stderr, "Mandos plugin mandos-client: "
385
"Unsupported algorithm: %s\n",
370
386
result->unsupported_algorithm);
371
fprintf(stderr, "Wrong key usage: %u\n",
387
fprintf(stderr, "Mandos plugin mandos-client: "
388
"Wrong key usage: %u\n",
372
389
result->wrong_key_usage);
373
390
if(result->file_name != NULL){
374
fprintf(stderr, "File name: %s\n", result->file_name);
391
fprintf(stderr, "Mandos plugin mandos-client: "
392
"File name: %s\n", result->file_name);
375
393
}
376
394
gpgme_recipient_t recipient;
377
395
recipient = result->recipients;
378
396
while(recipient != NULL){
379
fprintf(stderr, "Public key algorithm: %s\n",
397
fprintf(stderr, "Mandos plugin mandos-client: "
398
"Public key algorithm: %s\n",
380
399
gpgme_pubkey_algo_name(recipient->pubkey_algo));
381
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
382
fprintf(stderr, "Secret key available: %s\n",
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",
383
404
recipient->status == GPG_ERR_NO_SECKEY
384
405
? "No" : "Yes");
385
406
recipient = recipient->next;
390
411
}
391
412
392
413
if(debug){
393
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
414
fprintf(stderr, "Mandos plugin mandos-client: "
415
"Decryption of OpenPGP data succeeded\n");
394
416
}
395
417
396
418
/* Seek back to the beginning of the GPGME plaintext data buffer */
427
449
}
428
450
429
451
if(debug){
430
fprintf(stderr, "Decrypted password is: ");
452
fprintf(stderr, "Mandos plugin mandos-client: "
453
"Decrypted password is: ");
431
454
for(ssize_t i = 0; i < plaintext_length; i++){
432
455
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
433
456
}
455
478
/* GnuTLS log function callback */
456
479
static void debuggnutls(__attribute__((unused)) int level,
457
480
const char* string){
458
fprintf(stderr, "GnuTLS: %s", string);
481
fprintf(stderr, "Mandos plugin mandos-client: GnuTLS: %s", string);
459
482
}
460
483
461
484
static int init_gnutls_global(const char *pubkeyfilename,
463
486
int ret;
464
487
465
488
if(debug){
466
fprintf(stderr, "Initializing GnuTLS\n");
489
fprintf(stderr, "Mandos plugin mandos-client: "
490
"Initializing GnuTLS\n");
467
491
}
468
492
469
493
ret = gnutls_global_init();
470
494
if(ret != GNUTLS_E_SUCCESS){
471
fprintf(stderr, "GnuTLS global_init: %s\n",
472
safer_gnutls_strerror(ret));
495
fprintf(stderr, "Mandos plugin mandos-client: "
496
"GnuTLS global_init: %s\n", safer_gnutls_strerror(ret));
473
497
return -1;
474
498
}
475
499
484
508
/* OpenPGP credentials */
485
509
ret = gnutls_certificate_allocate_credentials(&mc.cred);
486
510
if(ret != GNUTLS_E_SUCCESS){
487
fprintf(stderr, "GnuTLS memory error: %s\n",
488
safer_gnutls_strerror(ret));
511
fprintf(stderr, "Mandos plugin mandos-client: "
512
"GnuTLS memory error: %s\n", safer_gnutls_strerror(ret));
489
513
gnutls_global_deinit();
490
514
return -1;
491
515
}
492
516
493
517
if(debug){
494
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
518
fprintf(stderr, "Mandos plugin mandos-client: "
519
"Attempting to use OpenPGP public key %s and"
495
520
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
496
521
seckeyfilename);
497
522
}
501
526
GNUTLS_OPENPGP_FMT_BASE64);
502
527
if(ret != GNUTLS_E_SUCCESS){
503
528
fprintf(stderr,
529
"Mandos plugin mandos-client: "
504
530
"Error[%d] while reading the OpenPGP key pair ('%s',"
505
531
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
506
fprintf(stderr, "The GnuTLS error is: %s\n",
507
safer_gnutls_strerror(ret));
532
fprintf(stderr, "Mandos plugin mandos-client: "
533
"The GnuTLS error is: %s\n", safer_gnutls_strerror(ret));
508
534
goto globalfail;
509
535
}
510
536
511
537
/* GnuTLS server initialization */
512
538
ret = gnutls_dh_params_init(&mc.dh_params);
513
539
if(ret != GNUTLS_E_SUCCESS){
514
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
540
fprintf(stderr, "Mandos plugin mandos-client: "
541
"Error in GnuTLS DH parameter initialization:"
515
542
" %s\n", safer_gnutls_strerror(ret));
516
543
goto globalfail;
517
544
}
518
545
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
519
546
if(ret != GNUTLS_E_SUCCESS){
520
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
547
fprintf(stderr, "Mandos plugin mandos-client: "
548
"Error in GnuTLS prime generation: %s\n",
521
549
safer_gnutls_strerror(ret));
522
550
goto globalfail;
523
551
}
544
572
}
545
573
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
546
574
if(ret != GNUTLS_E_SUCCESS){
547
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
575
fprintf(stderr, "Mandos plugin mandos-client: "
576
"Error in GnuTLS session initialization: %s\n",
548
577
safer_gnutls_strerror(ret));
549
578
}
550
579
558
587
}
559
588
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
560
589
if(ret != GNUTLS_E_SUCCESS){
561
fprintf(stderr, "Syntax error at: %s\n", err);
562
fprintf(stderr, "GnuTLS error: %s\n",
563
safer_gnutls_strerror(ret));
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));
564
594
gnutls_deinit(*session);
565
595
return -1;
566
596
}
575
605
}
576
606
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
577
607
if(ret != GNUTLS_E_SUCCESS){
578
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
608
fprintf(stderr, "Mandos plugin mandos-client: "
609
"Error setting GnuTLS credentials: %s\n",
579
610
safer_gnutls_strerror(ret));
580
611
gnutls_deinit(*session);
581
612
return -1;
627
658
pf = PF_INET;
628
659
break;
629
660
default:
630
fprintf(stderr, "Bad address family: %d\n", af);
661
fprintf(stderr, "Mandos plugin mandos-client: "
662
"Bad address family: %d\n", af);
631
663
errno = EINVAL;
632
664
return -1;
633
665
}
638
670
}
639
671
640
672
if(debug){
641
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
673
fprintf(stderr, "Mandos plugin mandos-client: "
674
"Setting up a TCP connection to %s, port %" PRIu16
642
675
"\n", ip, port);
643
676
}
644
677
671
704
}
672
705
if(ret == 0){
673
706
int e = errno;
674
fprintf(stderr, "Bad address: %s\n", ip);
707
fprintf(stderr, "Mandos plugin mandos-client: "
708
"Bad address: %s\n", ip);
675
709
errno = e;
676
710
goto mandos_end;
677
711
}
684
718
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
685
719
-Wunreachable-code*/
686
720
if(if_index == AVAHI_IF_UNSPEC){
687
fprintf(stderr, "An IPv6 link-local address is incomplete"
721
fprintf(stderr, "Mandos plugin mandos-client: "
722
"An IPv6 link-local address is incomplete"
688
723
" without a network interface\n");
689
724
errno = EINVAL;
690
725
goto mandos_end;
709
744
if(if_indextoname((unsigned int)if_index, interface) == NULL){
710
745
perror_plus("if_indextoname");
711
746
} else {
712
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
747
fprintf(stderr, "Mandos plugin mandos-client: "
748
"Connection to: %s%%%s, port %" PRIu16 "\n",
713
749
ip, interface, port);
714
750
}
715
751
} else {
716
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
717
port);
752
fprintf(stderr, "Mandos plugin mandos-client: "
753
"Connection to: %s, port %" PRIu16 "\n", ip, port);
718
754
}
719
755
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
720
756
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
730
766
perror_plus("inet_ntop");
731
767
} else {
732
768
if(strcmp(addrstr, ip) != 0){
733
fprintf(stderr, "Canonical address form: %s\n", addrstr);
769
fprintf(stderr, "Mandos plugin mandos-client: "
770
"Canonical address form: %s\n", addrstr);
734
771
}
735
772
}
736
773
}
790
827
}
791
828
792
829
if(debug){
793
fprintf(stderr, "Establishing TLS session with %s\n", ip);
830
fprintf(stderr, "Mandos plugin mandos-client: "
831
"Establishing TLS session with %s\n", ip);
794
832
}
795
833
796
834
if(quit_now){
816
854
817
855
if(ret != GNUTLS_E_SUCCESS){
818
856
if(debug){
819
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
857
fprintf(stderr, "Mandos plugin mandos-client: "
858
"*** GnuTLS Handshake failed ***\n");
820
859
gnutls_perror(ret);
821
860
}
822
861
errno = EPROTO;
826
865
/* Read OpenPGP packet that contains the wanted password */
827
866
828
867
if(debug){
829
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
830
ip);
868
fprintf(stderr, "Mandos plugin mandos-client: "
869
"Retrieving OpenPGP encrypted password from %s\n", ip);
831
870
}
832
871
833
872
while(true){
871
910
}
872
911
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
873
912
if(ret < 0){
874
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
913
fprintf(stderr, "Mandos plugin mandos-client: "
914
"*** GnuTLS Re-handshake failed ***\n");
875
915
gnutls_perror(ret);
876
916
errno = EPROTO;
877
917
goto mandos_end;
878
918
}
879
919
break;
880
920
default:
881
fprintf(stderr, "Unknown error while reading data from"
921
fprintf(stderr, "Mandos plugin mandos-client: "
922
"Unknown error while reading data from"
882
923
" encrypted session with Mandos server\n");
883
924
gnutls_bye(session, GNUTLS_SHUT_RDWR);
884
925
errno = EIO;
890
931
}
891
932
892
933
if(debug){
893
fprintf(stderr, "Closing TLS session\n");
934
fprintf(stderr, "Mandos plugin mandos-client: "
935
"Closing TLS session\n");
894
936
}
895
937
896
938
if(quit_now){
926
968
if(ret == 0 and ferror(stdout)){
927
969
int e = errno;
928
970
if(debug){
929
fprintf(stderr, "Error writing encrypted data: %s\n",
971
fprintf(stderr, "Mandos plugin mandos-client: "
972
"Error writing encrypted data: %s\n",
930
973
strerror(errno));
931
974
}
932
975
errno = e;
990
1033
switch(event){
991
1034
default:
992
1035
case AVAHI_RESOLVER_FAILURE:
993
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
1036
fprintf(stderr, "Mandos plugin mandos-client: "
1037
"(Avahi Resolver) Failed to resolve service '%s'"
994
1038
" of type '%s' in domain '%s': %s\n", name, type, domain,
995
1039
avahi_strerror(avahi_server_errno(mc.server)));
996
1040
break;
1000
1044
char ip[AVAHI_ADDRESS_STR_MAX];
1001
1045
avahi_address_snprint(ip, sizeof(ip), address);
1002
1046
if(debug){
1003
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
1047
fprintf(stderr, "Mandos plugin mandos-client: "
1048
"Mandos server \"%s\" found on %s (%s, %"
1004
1049
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
1005
1050
ip, (intmax_t)interface, port);
1006
1051
}
1040
1085
default:
1041
1086
case AVAHI_BROWSER_FAILURE:
1042
1087
1043
fprintf(stderr, "(Avahi browser) %s\n",
1088
fprintf(stderr, "Mandos plugin mandos-client: "
1089
"(Avahi browser) %s\n",
1044
1090
avahi_strerror(avahi_server_errno(mc.server)));
1045
1091
avahi_simple_poll_quit(mc.simple_poll);
1046
1092
return;
1054
1100
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1055
1101
name, type, domain, protocol, 0,
1056
1102
resolve_callback, NULL) == NULL)
1057
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
1103
fprintf(stderr, "Mandos plugin mandos-client: "
1104
"Avahi: Failed to resolve service '%s': %s\n",
1058
1105
name, avahi_strerror(avahi_server_errno(mc.server)));
1059
1106
break;
1060
1107
1064
1111
case AVAHI_BROWSER_ALL_FOR_NOW:
1065
1112
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1066
1113
if(debug){
1067
fprintf(stderr, "No Mandos server found, still searching...\n");
1114
fprintf(stderr, "Mandos plugin mandos-client: "
1115
"No Mandos server found, still searching...\n");
1068
1116
}
1069
1117
break;
1070
1118
}
1085
1133
errno = old_errno;
1086
1134
}
1087
1135
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){
1136
bool get_flags(const char *ifname, struct ifreq *ifr){
1137
int ret;
1138
1139
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1140
if(s < 0){
1141
perror_plus("socket");
1142
return false;
1143
}
1144
strcpy(ifr->ifr_name, ifname);
1145
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1146
if(ret == -1){
1144
1147
if(debug){
1145
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1146
flagstring, if_entry->d_name);
1148
perror_plus("ioctl SIOCGIFFLAGS");
1147
1149
}
1148
free(flagstring);
1149
return 0;
1150
return false;
1150
1151
}
1151
free(flagstring);
1152
ifreq_flags flags = (ifreq_flags)tmpmax;
1152
return true;
1153
}
1154
1155
bool good_flags(const char *ifname, const struct ifreq *ifr){
1156
1153
1157
/* Reject the loopback device */
1154
if(flags & IFF_LOOPBACK){
1158
if(ifr->ifr_flags & IFF_LOOPBACK){
1155
1159
if(debug){
1156
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1157
if_entry->d_name);
1160
fprintf(stderr, "Mandos plugin mandos-client: "
1161
"Rejecting loopback interface \"%s\"\n", ifname);
1158
1162
}
1159
return 0;
1163
return false;
1160
1164
}
1161
1165
/* Accept point-to-point devices only if connect_to is specified */
1162
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1166
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1163
1167
if(debug){
1164
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1165
if_entry->d_name);
1168
fprintf(stderr, "Mandos plugin mandos-client: "
1169
"Accepting point-to-point interface \"%s\"\n", ifname);
1166
1170
}
1167
return 1;
1171
return true;
1168
1172
}
1169
1173
/* Otherwise, reject non-broadcast-capable devices */
1170
if(not (flags & IFF_BROADCAST)){
1174
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1171
1175
if(debug){
1172
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1173
if_entry->d_name);
1176
fprintf(stderr, "Mandos plugin mandos-client: "
1177
"Rejecting non-broadcast interface \"%s\"\n", ifname);
1174
1178
}
1175
return 0;
1179
return false;
1176
1180
}
1177
1181
/* Reject non-ARP interfaces (including dummy interfaces) */
1178
if(flags & IFF_NOARP){
1182
if(ifr->ifr_flags & IFF_NOARP){
1179
1183
if(debug){
1180
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n",
1181
if_entry->d_name);
1184
fprintf(stderr, "Mandos plugin mandos-client: "
1185
"Rejecting non-ARP interface \"%s\"\n", ifname);
1182
1186
}
1183
return 0;
1187
return false;
1184
1188
}
1189
1185
1190
/* Accept this device */
1186
1191
if(debug){
1187
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1188
if_entry->d_name);
1192
fprintf(stderr, "Mandos plugin mandos-client: "
1193
"Interface \"%s\" is good\n", ifname);
1194
}
1195
return true;
1196
}
1197
1198
/*
1199
* This function determines if a directory entry in /sys/class/net
1200
* corresponds to an acceptable network device.
1201
* (This function is passed to scandir(3) as a filter function.)
1202
*/
1203
int good_interface(const struct dirent *if_entry){
1204
if(if_entry->d_name[0] == '.'){
1205
return 0;
1206
}
1207
1208
struct ifreq ifr;
1209
if(not get_flags(if_entry->d_name, &ifr)){
1210
if(debug){
1211
fprintf(stderr, "Mandos plugin mandos-client: "
1212
"Failed to get flags for interface \"%s\"\n",
1213
if_entry->d_name);
1214
}
1215
return 0;
1216
}
1217
1218
if(not good_flags(if_entry->d_name, &ifr)){
1219
return 0;
1220
}
1221
return 1;
1222
}
1223
1224
/*
1225
* This function determines if a directory entry in /sys/class/net
1226
* corresponds to an acceptable network device which is up.
1227
* (This function is passed to scandir(3) as a filter function.)
1228
*/
1229
int up_interface(const struct dirent *if_entry){
1230
if(if_entry->d_name[0] == '.'){
1231
return 0;
1232
}
1233
1234
struct ifreq ifr;
1235
if(not get_flags(if_entry->d_name, &ifr)){
1236
if(debug){
1237
fprintf(stderr, "Mandos plugin mandos-client: "
1238
"Failed to get flags for interface \"%s\"\n",
1239
if_entry->d_name);
1240
}
1241
return 0;
1242
}
1243
1244
/* Reject down interfaces */
1245
if(not (ifr.ifr_flags & IFF_UP)){
1246
if(debug){
1247
fprintf(stderr, "Mandos plugin mandos-client: "
1248
"Rejecting down interface \"%s\"\n",
1249
if_entry->d_name);
1250
}
1251
return 0;
1252
}
1253
1254
/* Reject non-running interfaces */
1255
if(not (ifr.ifr_flags & IFF_RUNNING)){
1256
if(debug){
1257
fprintf(stderr, "Mandos plugin mandos-client: "
1258
"Rejecting non-running interface \"%s\"\n",
1259
if_entry->d_name);
1260
}
1261
return 0;
1262
}
1263
1264
if(not good_flags(if_entry->d_name, &ifr)){
1265
return 0;
1189
1266
}
1190
1267
return 1;
1191
1268
}
1201
1278
return 1;
1202
1279
}
1203
1280
1281
/* Is this directory entry a runnable program? */
1282
int runnable_hook(const struct dirent *direntry){
1283
int ret;
1284
struct stat st;
1285
1286
if((direntry->d_name)[0] == '\0'){
1287
/* Empty name? */
1288
return 0;
1289
}
1290
1291
/* Save pointer to last character */
1292
char *end = strchr(direntry->d_name, '\0')-1;
1293
1294
if(*end == '~'){
1295
/* Backup name~ */
1296
return 0;
1297
}
1298
1299
if(((direntry->d_name)[0] == '#')
1300
and (*end == '#')){
1301
/* Temporary #name# */
1302
return 0;
1303
}
1304
1305
/* XXX more rules here */
1306
1307
ret = stat(direntry->d_name, &st);
1308
if(ret == -1){
1309
if(debug){
1310
perror_plus("Could not stat plugin");
1311
}
1312
return 0;
1313
}
1314
if(not (S_ISREG(st.st_mode))){
1315
/* Not a regular file */
1316
return 0;
1317
}
1318
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1319
/* Not executable */
1320
return 0;
1321
}
1322
return 1;
1323
}
1324
1204
1325
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1205
1326
int ret;
1206
1327
struct timespec now;
1210
1331
while(true){
1211
1332
if(mc.current_server == NULL){
1212
1333
if (debug){
1213
fprintf(stderr,
1334
fprintf(stderr, "Mandos plugin mandos-client: "
1214
1335
"Wait until first server is found. No timeout!\n");
1215
1336
}
1216
1337
ret = avahi_simple_poll_iterate(s, -1);
1217
1338
} else {
1218
1339
if (debug){
1219
fprintf(stderr, "Check current_server if we should run it,"
1340
fprintf(stderr, "Mandos plugin mandos-client: "
1341
"Check current_server if we should run it,"
1220
1342
" or wait\n");
1221
1343
}
1222
1344
/* the current time */
1239
1361
- ((intmax_t)waited_time.tv_nsec / 1000000));
1240
1362
1241
1363
if (debug){
1242
fprintf(stderr, "Blocking for %" PRIdMAX " ms\n", block_time);
1364
fprintf(stderr, "Mandos plugin mandos-client: "
1365
"Blocking for %" PRIdMAX " ms\n", block_time);
1243
1366
}
1244
1367
1245
1368
if(block_time <= 0){
1265
1388
ret = avahi_simple_poll_iterate(s, (int)block_time);
1266
1389
}
1267
1390
if(ret != 0){
1268
if (ret > 0 or errno != EINTR) {
1391
if (ret > 0 or errno != EINTR){
1269
1392
return (ret != 1) ? ret : 0;
1270
1393
}
1271
1394
}
1428
1551
argp_state_help(state, state->out_stream,
1429
1552
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1430
1553
case 'V': /* --version */
1554
fprintf(state->out_stream, "Mandos plugin mandos-client: ");
1431
1555
fprintf(state->out_stream, "%s\n", argp_program_version);
1432
1556
exit(argp_err_exit_status);
1433
1557
break;
1518
1642
}
1519
1643
}
1520
1644
1645
/* Find network hooks and run them */
1646
{
1647
struct dirent **direntries;
1648
struct dirent *direntry;
1649
int numhooks = scandir(HOOKDIR, &direntries, runnable_hook,
1650
alphasort);
1651
if(numhooks == -1){
1652
perror_plus("scandir");
1653
} else {
1654
int devnull = open("/dev/null", O_RDONLY);
1655
for(int i = 0; i < numhooks; i++){
1656
direntry = direntries[0];
1657
char *fullname = NULL;
1658
ret = asprintf(&fullname, "%s/%s", tempdir,
1659
direntry->d_name);
1660
if(ret < 0){
1661
perror_plus("asprintf");
1662
continue;
1663
}
1664
pid_t hook_pid = fork();
1665
if(hook_pid == 0){
1666
/* Child */
1667
dup2(devnull, STDIN_FILENO);
1668
close(devnull);
1669
dup2(STDERR_FILENO, STDOUT_FILENO);
1670
ret = setenv("DEVICE", interface, 1);
1671
if(ret == -1){
1672
perror_plus("setenv");
1673
exit(1);
1674
}
1675
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1676
if(ret == -1){
1677
perror_plus("setenv");
1678
exit(1);
1679
}
1680
ret = setenv("MODE", "start", 1);
1681
if(ret == -1){
1682
perror_plus("setenv");
1683
exit(1);
1684
}
1685
char *delaystring;
1686
ret = asprintf(&delaystring, "%f", delay);
1687
if(ret == -1){
1688
perror_plus("asprintf");
1689
exit(1);
1690
}
1691
ret = setenv("DELAY", delaystring, 1);
1692
if(ret == -1){
1693
free(delaystring);
1694
perror_plus("setenv");
1695
exit(1);
1696
}
1697
free(delaystring);
1698
ret = execl(fullname, direntry->d_name, "start", NULL);
1699
perror_plus("execl");
1700
} else {
1701
int status;
1702
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1703
perror_plus("waitpid");
1704
free(fullname);
1705
continue;
1706
}
1707
if(WIFEXITED(status)){
1708
if(WEXITSTATUS(status) != 0){
1709
fprintf(stderr, "Mandos plugin mandos-client: "
1710
"Warning: network hook \"%s\" exited"
1711
" with status %d\n", direntry->d_name,
1712
WEXITSTATUS(status));
1713
free(fullname);
1714
continue;
1715
}
1716
} else if(WIFSIGNALED(status)){
1717
fprintf(stderr, "Mandos plugin mandos-client: "
1718
"Warning: network hook \"%s\" died by"
1719
" signal %d\n", direntry->d_name,
1720
WTERMSIG(status));
1721
free(fullname);
1722
continue;
1723
} else {
1724
fprintf(stderr, "Mandos plugin mandos-client: "
1725
"Warning: network hook \"%s\" crashed\n",
1726
direntry->d_name);
1727
free(fullname);
1728
continue;
1729
}
1730
}
1731
free(fullname);
1732
if(quit_now){
1733
goto end;
1734
}
1735
}
1736
close(devnull);
1737
}
1738
}
1739
1521
1740
if(not debug){
1522
1741
avahi_set_log_function(empty_log);
1523
1742
}
1524
1743
1525
1744
if(interface[0] == '\0'){
1526
1745
struct dirent **direntries;
1527
ret = scandir(sys_class_net, &direntries, good_interface,
1746
/* First look for interfaces that are up */
1747
ret = scandir(sys_class_net, &direntries, up_interface,
1528
1748
alphasort);
1749
if(ret == 0){
1750
/* No up interfaces, look for any good interfaces */
1751
free(direntries);
1752
ret = scandir(sys_class_net, &direntries, good_interface,
1753
alphasort);
1754
}
1529
1755
if(ret >= 1){
1530
/* Pick the first good interface */
1756
/* Pick the first interface returned */
1531
1757
interface = strdup(direntries[0]->d_name);
1532
1758
if(debug){
1533
fprintf(stderr, "Using interface \"%s\"\n", interface);
1759
fprintf(stderr, "Mandos plugin mandos-client: "
1760
"Using interface \"%s\"\n", interface);
1534
1761
}
1535
1762
if(interface == NULL){
1536
1763
perror_plus("malloc");
1541
1768
free(direntries);
1542
1769
} else {
1543
1770
free(direntries);
1544
fprintf(stderr, "Could not find a network interface\n");
1771
fprintf(stderr, "Mandos plugin mandos-client: "
1772
"Could not find a network interface\n");
1545
1773
exitcode = EXIT_FAILURE;
1546
1774
goto end;
1547
1775
}
1553
1781
srand((unsigned int) time(NULL));
1554
1782
mc.simple_poll = avahi_simple_poll_new();
1555
1783
if(mc.simple_poll == NULL){
1556
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1784
fprintf(stderr, "Mandos plugin mandos-client: "
1785
"Avahi: Failed to create simple poll object.\n");
1557
1786
exitcode = EX_UNAVAILABLE;
1558
1787
goto end;
1559
1788
}
1625
1854
if(strcmp(interface, "none") != 0){
1626
1855
if_index = (AvahiIfIndex) if_nametoindex(interface);
1627
1856
if(if_index == 0){
1628
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1857
fprintf(stderr, "Mandos plugin mandos-client: "
1858
"No such interface: \"%s\"\n", interface);
1629
1859
exitcode = EX_UNAVAILABLE;
1630
1860
goto end;
1631
1861
}
1772
2002
1773
2003
ret = init_gnutls_global(pubkey, seckey);
1774
2004
if(ret == -1){
1775
fprintf(stderr, "init_gnutls_global failed\n");
2005
fprintf(stderr, "Mandos plugin mandos-client: "
2006
"init_gnutls_global failed\n");
1776
2007
exitcode = EX_UNAVAILABLE;
1777
2008
goto end;
1778
2009
} else {
1794
2025
}
1795
2026
1796
2027
if(not init_gpgme(pubkey, seckey, tempdir)){
1797
fprintf(stderr, "init_gpgme failed\n");
2028
fprintf(stderr, "Mandos plugin mandos-client: "
2029
"init_gpgme failed\n");
1798
2030
exitcode = EX_UNAVAILABLE;
1799
2031
goto end;
1800
2032
} else {
1810
2042
/* (Mainly meant for debugging) */
1811
2043
char *address = strrchr(connect_to, ':');
1812
2044
if(address == NULL){
1813
fprintf(stderr, "No colon in address\n");
2045
fprintf(stderr, "Mandos plugin mandos-client: "
2046
"No colon in address\n");
1814
2047
exitcode = EX_USAGE;
1815
2048
goto end;
1816
2049
}
1824
2057
tmpmax = strtoimax(address+1, &tmp, 10);
1825
2058
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1826
2059
or tmpmax != (uint16_t)tmpmax){
1827
fprintf(stderr, "Bad port number\n");
2060
fprintf(stderr, "Mandos plugin mandos-client: "
2061
"Bad port number\n");
1828
2062
exitcode = EX_USAGE;
1829
2063
goto end;
1830
2064
}
1860
2094
break;
1861
2095
}
1862
2096
if(debug){
1863
fprintf(stderr, "Retrying in %d seconds\n",
1864
(int)retry_interval);
2097
fprintf(stderr, "Mandos plugin mandos-client: "
2098
"Retrying in %d seconds\n", (int)retry_interval);
1865
2099
}
1866
2100
sleep((int)retry_interval);
1867
2101
}
1869
2103
if (not quit_now){
1870
2104
exitcode = EXIT_SUCCESS;
1871
2105
}
1872
2106
1873
2107
goto end;
1874
2108
}
1875
2109
1897
2131
1898
2132
/* Check if creating the Avahi server object succeeded */
1899
2133
if(mc.server == NULL){
1900
fprintf(stderr, "Failed to create Avahi server: %s\n",
2134
fprintf(stderr, "Mandos plugin mandos-client: "
2135
"Failed to create Avahi server: %s\n",
1901
2136
avahi_strerror(error));
1902
2137
exitcode = EX_UNAVAILABLE;
1903
2138
goto end;
1912
2147
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
1913
2148
NULL, 0, browse_callback, NULL);
1914
2149
if(sb == NULL){
1915
fprintf(stderr, "Failed to create service browser: %s\n",
2150
fprintf(stderr, "Mandos plugin mandos-client: "
2151
"Failed to create service browser: %s\n",
1916
2152
avahi_strerror(avahi_server_errno(mc.server)));
1917
2153
exitcode = EX_UNAVAILABLE;
1918
2154
goto end;
1925
2161
/* Run the main loop */
1926
2162
1927
2163
if(debug){
1928
fprintf(stderr, "Starting Avahi loop search\n");
2164
fprintf(stderr, "Mandos plugin mandos-client: "
2165
"Starting Avahi loop search\n");
1929
2166
}
1930
2167
1931
2168
ret = avahi_loop_with_timeout(mc.simple_poll,
1932
2169
(int)(retry_interval * 1000));
1933
2170
if(debug){
1934
fprintf(stderr, "avahi_loop_with_timeout exited %s\n",
2171
fprintf(stderr, "Mandos plugin mandos-client: "
2172
"avahi_loop_with_timeout exited %s\n",
1935
2173
(ret == 0) ? "successfully" : "with error");
1936
2174
}
1937
2175
1938
2176
end:
1939
2177
1940
2178
if(debug){
1941
fprintf(stderr, "%s exiting\n", argv[0]);
2179
fprintf(stderr, "Mandos plugin mandos-client: "
2180
"%s exiting\n", argv[0]);
1942
2181
}
1943
2182
1944
2183
/* Cleanup things */
1972
2211
}
1973
2212
}
1974
2213
2214
/* XXX run network hooks "stop" here */
2215
1975
2216
/* Take down the network interface */
1976
2217
if(take_down_interface){
1977
2218
/* Re-raise priviliges */
1984
2225
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1985
2226
if(ret == -1){
1986
2227
perror_plus("ioctl SIOCGIFFLAGS");
1987
} else if(network.ifr_flags & IFF_UP) {
2228
} else if(network.ifr_flags & IFF_UP){
1988
2229
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1989
2230
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1990
2231
if(ret == -1){
2022
2263
}
2023
2264
ret = remove(fullname);
2024
2265
if(ret == -1){
2025
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
2026
strerror(errno));
2266
fprintf(stderr, "Mandos plugin mandos-client: "
2267
"remove(\"%s\"): %s\n", fullname, strerror(errno));
2027
2268
}
2028
2269
free(fullname);
2029
2270
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0