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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() */
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";
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 */
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
}
718
684
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
719
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
}
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){
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){
968
926
if(ret == 0 and ferror(stdout)){
969
927
int e = errno;
970
928
if(debug){
971
fprintf(stderr, "Mandos plugin mandos-client: "
972
"Error writing encrypted data: %s\n",
929
fprintf(stderr, "Error writing encrypted data: %s\n",
973
930
strerror(errno));
974
931
}
975
932
errno = e;
1033
990
switch(event){
1034
991
default:
1035
992
case AVAHI_RESOLVER_FAILURE:
1036
fprintf(stderr, "Mandos plugin mandos-client: "
1037
"(Avahi Resolver) Failed to resolve service '%s'"
993
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
1038
994
" of type '%s' in domain '%s': %s\n", name, type, domain,
1039
995
avahi_strerror(avahi_server_errno(mc.server)));
1040
996
break;
1044
1000
char ip[AVAHI_ADDRESS_STR_MAX];
1045
1001
avahi_address_snprint(ip, sizeof(ip), address);
1046
1002
if(debug){
1047
fprintf(stderr, "Mandos plugin mandos-client: "
1048
"Mandos server \"%s\" found on %s (%s, %"
1003
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
1049
1004
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
1050
1005
ip, (intmax_t)interface, port);
1051
1006
}
1085
1040
default:
1086
1041
case AVAHI_BROWSER_FAILURE:
1087
1042
1088
fprintf(stderr, "Mandos plugin mandos-client: "
1089
"(Avahi browser) %s\n",
1043
fprintf(stderr, "(Avahi browser) %s\n",
1090
1044
avahi_strerror(avahi_server_errno(mc.server)));
1091
1045
avahi_simple_poll_quit(mc.simple_poll);
1092
1046
return;
1100
1054
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1101
1055
name, type, domain, protocol, 0,
1102
1056
resolve_callback, NULL) == NULL)
1103
fprintf(stderr, "Mandos plugin mandos-client: "
1104
"Avahi: Failed to resolve service '%s': %s\n",
1057
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
1105
1058
name, avahi_strerror(avahi_server_errno(mc.server)));
1106
1059
break;
1107
1060
1111
1064
case AVAHI_BROWSER_ALL_FOR_NOW:
1112
1065
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1113
1066
if(debug){
1114
fprintf(stderr, "Mandos plugin mandos-client: "
1115
"No Mandos server found, still searching...\n");
1067
fprintf(stderr, "No Mandos server found, still searching...\n");
1116
1068
}
1117
1069
break;
1118
1070
}
1133
1085
errno = old_errno;
1134
1086
}
1135
1087
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){
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){
1147
1144
if(debug){
1148
perror_plus("ioctl SIOCGIFFLAGS");
1145
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1146
flagstring, if_entry->d_name);
1149
1147
}
1150
return false;
1148
free(flagstring);
1149
return 0;
1151
1150
}
1152
return true;
1153
}
1154
1155
bool good_flags(const char *ifname, const struct ifreq *ifr){
1156
1151
free(flagstring);
1152
ifreq_flags flags = (ifreq_flags)tmpmax;
1157
1153
/* Reject the loopback device */
1158
if(ifr->ifr_flags & IFF_LOOPBACK){
1154
if(flags & IFF_LOOPBACK){
1159
1155
if(debug){
1160
fprintf(stderr, "Mandos plugin mandos-client: "
1161
"Rejecting loopback interface \"%s\"\n", ifname);
1156
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1157
if_entry->d_name);
1162
1158
}
1163
return false;
1159
return 0;
1164
1160
}
1165
1161
/* Accept point-to-point devices only if connect_to is specified */
1166
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1162
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1167
1163
if(debug){
1168
fprintf(stderr, "Mandos plugin mandos-client: "
1169
"Accepting point-to-point interface \"%s\"\n", ifname);
1164
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1165
if_entry->d_name);
1170
1166
}
1171
return true;
1167
return 1;
1172
1168
}
1173
1169
/* Otherwise, reject non-broadcast-capable devices */
1174
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1170
if(not (flags & IFF_BROADCAST)){
1175
1171
if(debug){
1176
fprintf(stderr, "Mandos plugin mandos-client: "
1177
"Rejecting non-broadcast interface \"%s\"\n", ifname);
1172
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1173
if_entry->d_name);
1178
1174
}
1179
return false;
1175
return 0;
1180
1176
}
1181
1177
/* Reject non-ARP interfaces (including dummy interfaces) */
1182
if(ifr->ifr_flags & IFF_NOARP){
1178
if(flags & IFF_NOARP){
1183
1179
if(debug){
1184
fprintf(stderr, "Mandos plugin mandos-client: "
1185
"Rejecting non-ARP interface \"%s\"\n", ifname);
1180
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n",
1181
if_entry->d_name);
1186
1182
}
1187
return false;
1183
return 0;
1188
1184
}
1189
1190
1185
/* Accept this device */
1191
1186
if(debug){
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;
1187
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1188
if_entry->d_name);
1266
1189
}
1267
1190
return 1;
1268
1191
}
1278
1201
return 1;
1279
1202
}
1280
1203
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
1325
1204
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1326
1205
int ret;
1327
1206
struct timespec now;
1331
1210
while(true){
1332
1211
if(mc.current_server == NULL){
1333
1212
if (debug){
1334
fprintf(stderr, "Mandos plugin mandos-client: "
1213
fprintf(stderr,
1335
1214
"Wait until first server is found. No timeout!\n");
1336
1215
}
1337
1216
ret = avahi_simple_poll_iterate(s, -1);
1338
1217
} else {
1339
1218
if (debug){
1340
fprintf(stderr, "Mandos plugin mandos-client: "
1341
"Check current_server if we should run it,"
1219
fprintf(stderr, "Check current_server if we should run it,"
1342
1220
" or wait\n");
1343
1221
}
1344
1222
/* the current time */
1361
1239
- ((intmax_t)waited_time.tv_nsec / 1000000));
1362
1240
1363
1241
if (debug){
1364
fprintf(stderr, "Mandos plugin mandos-client: "
1365
"Blocking for %" PRIdMAX " ms\n", block_time);
1242
fprintf(stderr, "Blocking for %" PRIdMAX " ms\n", block_time);
1366
1243
}
1367
1244
1368
1245
if(block_time <= 0){
1388
1265
ret = avahi_simple_poll_iterate(s, (int)block_time);
1389
1266
}
1390
1267
if(ret != 0){
1391
if (ret > 0 or errno != EINTR){
1268
if (ret > 0 or errno != EINTR) {
1392
1269
return (ret != 1) ? ret : 0;
1393
1270
}
1394
1271
}
1551
1428
argp_state_help(state, state->out_stream,
1552
1429
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1553
1430
case 'V': /* --version */
1554
fprintf(state->out_stream, "Mandos plugin mandos-client: ");
1555
1431
fprintf(state->out_stream, "%s\n", argp_program_version);
1556
1432
exit(argp_err_exit_status);
1557
1433
break;
1642
1518
}
1643
1519
}
1644
1520
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
1740
1521
if(not debug){
1741
1522
avahi_set_log_function(empty_log);
1742
1523
}
1743
1524
1744
1525
if(interface[0] == '\0'){
1745
1526
struct dirent **direntries;
1746
/* First look for interfaces that are up */
1747
ret = scandir(sys_class_net, &direntries, up_interface,
1527
ret = scandir(sys_class_net, &direntries, good_interface,
1748
1528
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
}
1755
1529
if(ret >= 1){
1756
/* Pick the first interface returned */
1530
/* Pick the first good interface */
1757
1531
interface = strdup(direntries[0]->d_name);
1758
1532
if(debug){
1759
fprintf(stderr, "Mandos plugin mandos-client: "
1760
"Using interface \"%s\"\n", interface);
1533
fprintf(stderr, "Using interface \"%s\"\n", interface);
1761
1534
}
1762
1535
if(interface == NULL){
1763
1536
perror_plus("malloc");
1768
1541
free(direntries);
1769
1542
} else {
1770
1543
free(direntries);
1771
fprintf(stderr, "Mandos plugin mandos-client: "
1772
"Could not find a network interface\n");
1544
fprintf(stderr, "Could not find a network interface\n");
1773
1545
exitcode = EXIT_FAILURE;
1774
1546
goto end;
1775
1547
}
1781
1553
srand((unsigned int) time(NULL));
1782
1554
mc.simple_poll = avahi_simple_poll_new();
1783
1555
if(mc.simple_poll == NULL){
1784
fprintf(stderr, "Mandos plugin mandos-client: "
1785
"Avahi: Failed to create simple poll object.\n");
1556
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1786
1557
exitcode = EX_UNAVAILABLE;
1787
1558
goto end;
1788
1559
}
1854
1625
if(strcmp(interface, "none") != 0){
1855
1626
if_index = (AvahiIfIndex) if_nametoindex(interface);
1856
1627
if(if_index == 0){
1857
fprintf(stderr, "Mandos plugin mandos-client: "
1858
"No such interface: \"%s\"\n", interface);
1628
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1859
1629
exitcode = EX_UNAVAILABLE;
1860
1630
goto end;
1861
1631
}
2002
1772
2003
1773
ret = init_gnutls_global(pubkey, seckey);
2004
1774
if(ret == -1){
2005
fprintf(stderr, "Mandos plugin mandos-client: "
2006
"init_gnutls_global failed\n");
1775
fprintf(stderr, "init_gnutls_global failed\n");
2007
1776
exitcode = EX_UNAVAILABLE;
2008
1777
goto end;
2009
1778
} else {
2025
1794
}
2026
1795
2027
1796
if(not init_gpgme(pubkey, seckey, tempdir)){
2028
fprintf(stderr, "Mandos plugin mandos-client: "
2029
"init_gpgme failed\n");
1797
fprintf(stderr, "init_gpgme failed\n");
2030
1798
exitcode = EX_UNAVAILABLE;
2031
1799
goto end;
2032
1800
} else {
2042
1810
/* (Mainly meant for debugging) */
2043
1811
char *address = strrchr(connect_to, ':');
2044
1812
if(address == NULL){
2045
fprintf(stderr, "Mandos plugin mandos-client: "
2046
"No colon in address\n");
1813
fprintf(stderr, "No colon in address\n");
2047
1814
exitcode = EX_USAGE;
2048
1815
goto end;
2049
1816
}
2057
1824
tmpmax = strtoimax(address+1, &tmp, 10);
2058
1825
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2059
1826
or tmpmax != (uint16_t)tmpmax){
2060
fprintf(stderr, "Mandos plugin mandos-client: "
2061
"Bad port number\n");
1827
fprintf(stderr, "Bad port number\n");
2062
1828
exitcode = EX_USAGE;
2063
1829
goto end;
2064
1830
}
2094
1860
break;
2095
1861
}
2096
1862
if(debug){
2097
fprintf(stderr, "Mandos plugin mandos-client: "
2098
"Retrying in %d seconds\n", (int)retry_interval);
1863
fprintf(stderr, "Retrying in %d seconds\n",
1864
(int)retry_interval);
2099
1865
}
2100
1866
sleep((int)retry_interval);
2101
1867
}
2103
1869
if (not quit_now){
2104
1870
exitcode = EXIT_SUCCESS;
2105
1871
}
2106
1872
2107
1873
goto end;
2108
1874
}
2109
1875
2131
1897
2132
1898
/* Check if creating the Avahi server object succeeded */
2133
1899
if(mc.server == NULL){
2134
fprintf(stderr, "Mandos plugin mandos-client: "
2135
"Failed to create Avahi server: %s\n",
1900
fprintf(stderr, "Failed to create Avahi server: %s\n",
2136
1901
avahi_strerror(error));
2137
1902
exitcode = EX_UNAVAILABLE;
2138
1903
goto end;
2147
1912
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2148
1913
NULL, 0, browse_callback, NULL);
2149
1914
if(sb == NULL){
2150
fprintf(stderr, "Mandos plugin mandos-client: "
2151
"Failed to create service browser: %s\n",
1915
fprintf(stderr, "Failed to create service browser: %s\n",
2152
1916
avahi_strerror(avahi_server_errno(mc.server)));
2153
1917
exitcode = EX_UNAVAILABLE;
2154
1918
goto end;
2161
1925
/* Run the main loop */
2162
1926
2163
1927
if(debug){
2164
fprintf(stderr, "Mandos plugin mandos-client: "
2165
"Starting Avahi loop search\n");
1928
fprintf(stderr, "Starting Avahi loop search\n");
2166
1929
}
2167
1930
2168
1931
ret = avahi_loop_with_timeout(mc.simple_poll,
2169
1932
(int)(retry_interval * 1000));
2170
1933
if(debug){
2171
fprintf(stderr, "Mandos plugin mandos-client: "
2172
"avahi_loop_with_timeout exited %s\n",
1934
fprintf(stderr, "avahi_loop_with_timeout exited %s\n",
2173
1935
(ret == 0) ? "successfully" : "with error");
2174
1936
}
2175
1937
2176
1938
end:
2177
1939
2178
1940
if(debug){
2179
fprintf(stderr, "Mandos plugin mandos-client: "
2180
"%s exiting\n", argv[0]);
1941
fprintf(stderr, "%s exiting\n", argv[0]);
2181
1942
}
2182
1943
2183
1944
/* Cleanup things */
2211
1972
}
2212
1973
}
2213
1974
2214
/* XXX run network hooks "stop" here */
2215
2216
1975
/* Take down the network interface */
2217
1976
if(take_down_interface){
2218
1977
/* Re-raise priviliges */
2225
1984
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2226
1985
if(ret == -1){
2227
1986
perror_plus("ioctl SIOCGIFFLAGS");
2228
} else if(network.ifr_flags & IFF_UP){
1987
} else if(network.ifr_flags & IFF_UP) {
2229
1988
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2230
1989
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2231
1990
if(ret == -1){
2263
2022
}
2264
2023
ret = remove(fullname);
2265
2024
if(ret == -1){
2266
fprintf(stderr, "Mandos plugin mandos-client: "
2267
"remove(\"%s\"): %s\n", fullname, strerror(errno));
2025
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
2026
strerror(errno));
2268
2027
}
2269
2028
free(fullname);
2270
2029
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0