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- Committer: teddy at bsnet
- Date: 2011-11-11 09:07:09 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-20111111090709-0fejxcxn4my8g8ry
* plugins.d/mandos-client.c (good_interface): Use SIOCGIFFLAGS instead
of reading
/sys/class/net/*/flags.
of reading
/sys/class/net/*/flags.
- files modified:
- plugins.d/mandos-client.c
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";
133
130
const char *argp_program_bug_address = "<mandos@recompile.se>";
134
131
static const char sys_class_net[] = "/sys/class/net";
135
132
char *connect_to = NULL;
136
const char *hookdir = HOOKDIR;
137
133
138
134
/* Doubly linked list that need to be circularly linked when used */
139
135
typedef struct server{
254
250
255
251
rc = gpgme_data_new_from_fd(&pgp_data, fd);
256
252
if(rc != GPG_ERR_NO_ERROR){
257
fprintf(stderr, "Mandos plugin mandos-client: "
258
"bad gpgme_data_new_from_fd: %s: %s\n",
253
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
259
254
gpgme_strsource(rc), gpgme_strerror(rc));
260
255
return false;
261
256
}
262
257
263
258
rc = gpgme_op_import(mc.ctx, pgp_data);
264
259
if(rc != GPG_ERR_NO_ERROR){
265
fprintf(stderr, "Mandos plugin mandos-client: "
266
"bad gpgme_op_import: %s: %s\n",
260
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
267
261
gpgme_strsource(rc), gpgme_strerror(rc));
268
262
return false;
269
263
}
277
271
}
278
272
279
273
if(debug){
280
fprintf(stderr, "Mandos plugin mandos-client: "
281
"Initializing GPGME\n");
274
fprintf(stderr, "Initializing GPGME\n");
282
275
}
283
276
284
277
/* Init GPGME */
285
278
gpgme_check_version(NULL);
286
279
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
287
280
if(rc != GPG_ERR_NO_ERROR){
288
fprintf(stderr, "Mandos plugin mandos-client: "
289
"bad gpgme_engine_check_version: %s: %s\n",
281
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
290
282
gpgme_strsource(rc), gpgme_strerror(rc));
291
283
return false;
292
284
}
294
286
/* Set GPGME home directory for the OpenPGP engine only */
295
287
rc = gpgme_get_engine_info(&engine_info);
296
288
if(rc != GPG_ERR_NO_ERROR){
297
fprintf(stderr, "Mandos plugin mandos-client: "
298
"bad gpgme_get_engine_info: %s: %s\n",
289
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
299
290
gpgme_strsource(rc), gpgme_strerror(rc));
300
291
return false;
301
292
}
308
299
engine_info = engine_info->next;
309
300
}
310
301
if(engine_info == NULL){
311
fprintf(stderr, "Mandos plugin mandos-client: "
312
"Could not set GPGME home dir to %s\n", tempdir);
302
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
313
303
return false;
314
304
}
315
305
316
306
/* Create new GPGME "context" */
317
307
rc = gpgme_new(&(mc.ctx));
318
308
if(rc != GPG_ERR_NO_ERROR){
319
fprintf(stderr, "Mandos plugin mandos-client: "
320
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
321
gpgme_strerror(rc));
309
fprintf(stderr, "bad gpgme_new: %s: %s\n",
310
gpgme_strsource(rc), gpgme_strerror(rc));
322
311
return false;
323
312
}
324
313
343
332
ssize_t plaintext_length = 0;
344
333
345
334
if(debug){
346
fprintf(stderr, "Mandos plugin mandos-client: "
347
"Trying to decrypt OpenPGP data\n");
335
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
348
336
}
349
337
350
338
/* Create new GPGME data buffer from memory cryptotext */
351
339
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
352
340
0);
353
341
if(rc != GPG_ERR_NO_ERROR){
354
fprintf(stderr, "Mandos plugin mandos-client: "
355
"bad gpgme_data_new_from_mem: %s: %s\n",
342
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
356
343
gpgme_strsource(rc), gpgme_strerror(rc));
357
344
return -1;
358
345
}
360
347
/* Create new empty GPGME data buffer for the plaintext */
361
348
rc = gpgme_data_new(&dh_plain);
362
349
if(rc != GPG_ERR_NO_ERROR){
363
fprintf(stderr, "Mandos plugin mandos-client: "
364
"bad gpgme_data_new: %s: %s\n",
350
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
365
351
gpgme_strsource(rc), gpgme_strerror(rc));
366
352
gpgme_data_release(dh_crypto);
367
353
return -1;
371
357
data buffer */
372
358
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
373
359
if(rc != GPG_ERR_NO_ERROR){
374
fprintf(stderr, "Mandos plugin mandos-client: "
375
"bad gpgme_op_decrypt: %s: %s\n",
360
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
376
361
gpgme_strsource(rc), gpgme_strerror(rc));
377
362
plaintext_length = -1;
378
363
if(debug){
379
364
gpgme_decrypt_result_t result;
380
365
result = gpgme_op_decrypt_result(mc.ctx);
381
366
if(result == NULL){
382
fprintf(stderr, "Mandos plugin mandos-client: "
383
"gpgme_op_decrypt_result failed\n");
367
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
384
368
} else {
385
fprintf(stderr, "Mandos plugin mandos-client: "
386
"Unsupported algorithm: %s\n",
369
fprintf(stderr, "Unsupported algorithm: %s\n",
387
370
result->unsupported_algorithm);
388
fprintf(stderr, "Mandos plugin mandos-client: "
389
"Wrong key usage: %u\n",
371
fprintf(stderr, "Wrong key usage: %u\n",
390
372
result->wrong_key_usage);
391
373
if(result->file_name != NULL){
392
fprintf(stderr, "Mandos plugin mandos-client: "
393
"File name: %s\n", result->file_name);
374
fprintf(stderr, "File name: %s\n", result->file_name);
394
375
}
395
376
gpgme_recipient_t recipient;
396
377
recipient = result->recipients;
397
378
while(recipient != NULL){
398
fprintf(stderr, "Mandos plugin mandos-client: "
399
"Public key algorithm: %s\n",
379
fprintf(stderr, "Public key algorithm: %s\n",
400
380
gpgme_pubkey_algo_name(recipient->pubkey_algo));
401
fprintf(stderr, "Mandos plugin mandos-client: "
402
"Key ID: %s\n", recipient->keyid);
403
fprintf(stderr, "Mandos plugin mandos-client: "
404
"Secret key available: %s\n",
381
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
382
fprintf(stderr, "Secret key available: %s\n",
405
383
recipient->status == GPG_ERR_NO_SECKEY
406
384
? "No" : "Yes");
407
385
recipient = recipient->next;
412
390
}
413
391
414
392
if(debug){
415
fprintf(stderr, "Mandos plugin mandos-client: "
416
"Decryption of OpenPGP data succeeded\n");
393
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
417
394
}
418
395
419
396
/* Seek back to the beginning of the GPGME plaintext data buffer */
450
427
}
451
428
452
429
if(debug){
453
fprintf(stderr, "Mandos plugin mandos-client: "
454
"Decrypted password is: ");
430
fprintf(stderr, "Decrypted password is: ");
455
431
for(ssize_t i = 0; i < plaintext_length; i++){
456
432
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
457
433
}
479
455
/* GnuTLS log function callback */
480
456
static void debuggnutls(__attribute__((unused)) int level,
481
457
const char* string){
482
fprintf(stderr, "Mandos plugin mandos-client: GnuTLS: %s", string);
458
fprintf(stderr, "GnuTLS: %s", string);
483
459
}
484
460
485
461
static int init_gnutls_global(const char *pubkeyfilename,
487
463
int ret;
488
464
489
465
if(debug){
490
fprintf(stderr, "Mandos plugin mandos-client: "
491
"Initializing GnuTLS\n");
466
fprintf(stderr, "Initializing GnuTLS\n");
492
467
}
493
468
494
469
ret = gnutls_global_init();
495
470
if(ret != GNUTLS_E_SUCCESS){
496
fprintf(stderr, "Mandos plugin mandos-client: "
497
"GnuTLS global_init: %s\n", safer_gnutls_strerror(ret));
471
fprintf(stderr, "GnuTLS global_init: %s\n",
472
safer_gnutls_strerror(ret));
498
473
return -1;
499
474
}
500
475
509
484
/* OpenPGP credentials */
510
485
ret = gnutls_certificate_allocate_credentials(&mc.cred);
511
486
if(ret != GNUTLS_E_SUCCESS){
512
fprintf(stderr, "Mandos plugin mandos-client: "
513
"GnuTLS memory error: %s\n", safer_gnutls_strerror(ret));
487
fprintf(stderr, "GnuTLS memory error: %s\n",
488
safer_gnutls_strerror(ret));
514
489
gnutls_global_deinit();
515
490
return -1;
516
491
}
517
492
518
493
if(debug){
519
fprintf(stderr, "Mandos plugin mandos-client: "
520
"Attempting to use OpenPGP public key %s and"
494
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
521
495
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
522
496
seckeyfilename);
523
497
}
527
501
GNUTLS_OPENPGP_FMT_BASE64);
528
502
if(ret != GNUTLS_E_SUCCESS){
529
503
fprintf(stderr,
530
"Mandos plugin mandos-client: "
531
504
"Error[%d] while reading the OpenPGP key pair ('%s',"
532
505
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
533
fprintf(stderr, "Mandos plugin mandos-client: "
534
"The GnuTLS error is: %s\n", safer_gnutls_strerror(ret));
506
fprintf(stderr, "The GnuTLS error is: %s\n",
507
safer_gnutls_strerror(ret));
535
508
goto globalfail;
536
509
}
537
510
538
511
/* GnuTLS server initialization */
539
512
ret = gnutls_dh_params_init(&mc.dh_params);
540
513
if(ret != GNUTLS_E_SUCCESS){
541
fprintf(stderr, "Mandos plugin mandos-client: "
542
"Error in GnuTLS DH parameter initialization:"
514
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
543
515
" %s\n", safer_gnutls_strerror(ret));
544
516
goto globalfail;
545
517
}
546
518
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
547
519
if(ret != GNUTLS_E_SUCCESS){
548
fprintf(stderr, "Mandos plugin mandos-client: "
549
"Error in GnuTLS prime generation: %s\n",
520
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
550
521
safer_gnutls_strerror(ret));
551
522
goto globalfail;
552
523
}
573
544
}
574
545
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
575
546
if(ret != GNUTLS_E_SUCCESS){
576
fprintf(stderr, "Mandos plugin mandos-client: "
577
"Error in GnuTLS session initialization: %s\n",
547
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
578
548
safer_gnutls_strerror(ret));
579
549
}
580
550
588
558
}
589
559
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
590
560
if(ret != GNUTLS_E_SUCCESS){
591
fprintf(stderr, "Mandos plugin mandos-client: "
592
"Syntax error at: %s\n", err);
593
fprintf(stderr, "Mandos plugin mandos-client: "
594
"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));
595
564
gnutls_deinit(*session);
596
565
return -1;
597
566
}
606
575
}
607
576
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
608
577
if(ret != GNUTLS_E_SUCCESS){
609
fprintf(stderr, "Mandos plugin mandos-client: "
610
"Error setting GnuTLS credentials: %s\n",
578
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
611
579
safer_gnutls_strerror(ret));
612
580
gnutls_deinit(*session);
613
581
return -1;
659
627
pf = PF_INET;
660
628
break;
661
629
default:
662
fprintf(stderr, "Mandos plugin mandos-client: "
663
"Bad address family: %d\n", af);
630
fprintf(stderr, "Bad address family: %d\n", af);
664
631
errno = EINVAL;
665
632
return -1;
666
633
}
671
638
}
672
639
673
640
if(debug){
674
fprintf(stderr, "Mandos plugin mandos-client: "
675
"Setting up a TCP connection to %s, port %" PRIu16
641
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
676
642
"\n", ip, port);
677
643
}
678
644
705
671
}
706
672
if(ret == 0){
707
673
int e = errno;
708
fprintf(stderr, "Mandos plugin mandos-client: "
709
"Bad address: %s\n", ip);
674
fprintf(stderr, "Bad address: %s\n", ip);
710
675
errno = e;
711
676
goto mandos_end;
712
677
}
719
684
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
720
685
-Wunreachable-code*/
721
686
if(if_index == AVAHI_IF_UNSPEC){
722
fprintf(stderr, "Mandos plugin mandos-client: "
723
"An IPv6 link-local address is incomplete"
687
fprintf(stderr, "An IPv6 link-local address is incomplete"
724
688
" without a network interface\n");
725
689
errno = EINVAL;
726
690
goto mandos_end;
745
709
if(if_indextoname((unsigned int)if_index, interface) == NULL){
746
710
perror_plus("if_indextoname");
747
711
} else {
748
fprintf(stderr, "Mandos plugin mandos-client: "
749
"Connection to: %s%%%s, port %" PRIu16 "\n",
712
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
750
713
ip, interface, port);
751
714
}
752
715
} else {
753
fprintf(stderr, "Mandos plugin mandos-client: "
754
"Connection to: %s, port %" PRIu16 "\n", ip, port);
716
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
717
port);
755
718
}
756
719
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
757
720
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
767
730
perror_plus("inet_ntop");
768
731
} else {
769
732
if(strcmp(addrstr, ip) != 0){
770
fprintf(stderr, "Mandos plugin mandos-client: "
771
"Canonical address form: %s\n", addrstr);
733
fprintf(stderr, "Canonical address form: %s\n", addrstr);
772
734
}
773
735
}
774
736
}
828
790
}
829
791
830
792
if(debug){
831
fprintf(stderr, "Mandos plugin mandos-client: "
832
"Establishing TLS session with %s\n", ip);
793
fprintf(stderr, "Establishing TLS session with %s\n", ip);
833
794
}
834
795
835
796
if(quit_now){
855
816
856
817
if(ret != GNUTLS_E_SUCCESS){
857
818
if(debug){
858
fprintf(stderr, "Mandos plugin mandos-client: "
859
"*** GnuTLS Handshake failed ***\n");
819
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
860
820
gnutls_perror(ret);
861
821
}
862
822
errno = EPROTO;
866
826
/* Read OpenPGP packet that contains the wanted password */
867
827
868
828
if(debug){
869
fprintf(stderr, "Mandos plugin mandos-client: "
870
"Retrieving OpenPGP encrypted password from %s\n", ip);
829
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
830
ip);
871
831
}
872
832
873
833
while(true){
911
871
}
912
872
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
913
873
if(ret < 0){
914
fprintf(stderr, "Mandos plugin mandos-client: "
915
"*** GnuTLS Re-handshake failed ***\n");
874
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
916
875
gnutls_perror(ret);
917
876
errno = EPROTO;
918
877
goto mandos_end;
919
878
}
920
879
break;
921
880
default:
922
fprintf(stderr, "Mandos plugin mandos-client: "
923
"Unknown error while reading data from"
881
fprintf(stderr, "Unknown error while reading data from"
924
882
" encrypted session with Mandos server\n");
925
883
gnutls_bye(session, GNUTLS_SHUT_RDWR);
926
884
errno = EIO;
932
890
}
933
891
934
892
if(debug){
935
fprintf(stderr, "Mandos plugin mandos-client: "
936
"Closing TLS session\n");
893
fprintf(stderr, "Closing TLS session\n");
937
894
}
938
895
939
896
if(quit_now){
969
926
if(ret == 0 and ferror(stdout)){
970
927
int e = errno;
971
928
if(debug){
972
fprintf(stderr, "Mandos plugin mandos-client: "
973
"Error writing encrypted data: %s\n",
929
fprintf(stderr, "Error writing encrypted data: %s\n",
974
930
strerror(errno));
975
931
}
976
932
errno = e;
1034
990
switch(event){
1035
991
default:
1036
992
case AVAHI_RESOLVER_FAILURE:
1037
fprintf(stderr, "Mandos plugin mandos-client: "
1038
"(Avahi Resolver) Failed to resolve service '%s'"
993
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
1039
994
" of type '%s' in domain '%s': %s\n", name, type, domain,
1040
995
avahi_strerror(avahi_server_errno(mc.server)));
1041
996
break;
1045
1000
char ip[AVAHI_ADDRESS_STR_MAX];
1046
1001
avahi_address_snprint(ip, sizeof(ip), address);
1047
1002
if(debug){
1048
fprintf(stderr, "Mandos plugin mandos-client: "
1049
"Mandos server \"%s\" found on %s (%s, %"
1003
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
1050
1004
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
1051
1005
ip, (intmax_t)interface, port);
1052
1006
}
1086
1040
default:
1087
1041
case AVAHI_BROWSER_FAILURE:
1088
1042
1089
fprintf(stderr, "Mandos plugin mandos-client: "
1090
"(Avahi browser) %s\n",
1043
fprintf(stderr, "(Avahi browser) %s\n",
1091
1044
avahi_strerror(avahi_server_errno(mc.server)));
1092
1045
avahi_simple_poll_quit(mc.simple_poll);
1093
1046
return;
1101
1054
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1102
1055
name, type, domain, protocol, 0,
1103
1056
resolve_callback, NULL) == NULL)
1104
fprintf(stderr, "Mandos plugin mandos-client: "
1105
"Avahi: Failed to resolve service '%s': %s\n",
1057
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
1106
1058
name, avahi_strerror(avahi_server_errno(mc.server)));
1107
1059
break;
1108
1060
1112
1064
case AVAHI_BROWSER_ALL_FOR_NOW:
1113
1065
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1114
1066
if(debug){
1115
fprintf(stderr, "Mandos plugin mandos-client: "
1116
"No Mandos server found, still searching...\n");
1067
fprintf(stderr, "No Mandos server found, still searching...\n");
1117
1068
}
1118
1069
break;
1119
1070
}
1158
1109
/* Reject the loopback device */
1159
1110
if(ifr->ifr_flags & IFF_LOOPBACK){
1160
1111
if(debug){
1161
fprintf(stderr, "Mandos plugin mandos-client: "
1162
"Rejecting loopback interface \"%s\"\n", ifname);
1112
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1113
ifname);
1163
1114
}
1164
1115
return false;
1165
1116
}
1166
1117
/* Accept point-to-point devices only if connect_to is specified */
1167
1118
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1168
1119
if(debug){
1169
fprintf(stderr, "Mandos plugin mandos-client: "
1170
"Accepting point-to-point interface \"%s\"\n", ifname);
1120
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1121
ifname);
1171
1122
}
1172
1123
return true;
1173
1124
}
1174
1125
/* Otherwise, reject non-broadcast-capable devices */
1175
1126
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1176
1127
if(debug){
1177
fprintf(stderr, "Mandos plugin mandos-client: "
1178
"Rejecting non-broadcast interface \"%s\"\n", ifname);
1128
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1129
ifname);
1179
1130
}
1180
1131
return false;
1181
1132
}
1182
1133
/* Reject non-ARP interfaces (including dummy interfaces) */
1183
1134
if(ifr->ifr_flags & IFF_NOARP){
1184
1135
if(debug){
1185
fprintf(stderr, "Mandos plugin mandos-client: "
1186
"Rejecting non-ARP interface \"%s\"\n", ifname);
1136
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n", ifname);
1187
1137
}
1188
1138
return false;
1189
1139
}
1190
1140
1191
1141
/* Accept this device */
1192
1142
if(debug){
1193
fprintf(stderr, "Mandos plugin mandos-client: "
1194
"Interface \"%s\" is good\n", ifname);
1143
fprintf(stderr, "Interface \"%s\" is good\n", ifname);
1195
1144
}
1196
1145
return true;
1197
1146
}
1202
1151
* (This function is passed to scandir(3) as a filter function.)
1203
1152
*/
1204
1153
int good_interface(const struct dirent *if_entry){
1154
int ret;
1205
1155
if(if_entry->d_name[0] == '.'){
1206
1156
return 0;
1207
1157
}
1208
1209
1158
struct ifreq ifr;
1210
if(not get_flags(if_entry->d_name, &ifr)){
1211
if(debug){
1212
fprintf(stderr, "Mandos plugin mandos-client: "
1213
"Failed to get flags for interface \"%s\"\n",
1214
if_entry->d_name);
1215
}
1216
return 0;
1217
}
1218
1219
if(not good_flags(if_entry->d_name, &ifr)){
1220
return 0;
1221
}
1222
return 1;
1223
}
1224
1159
1225
/*
1226
* This function determines if a directory entry in /sys/class/net
1227
* corresponds to an acceptable network device which is up.
1228
* (This function is passed to scandir(3) as a filter function.)
1229
*/
1230
int up_interface(const struct dirent *if_entry){
1231
if(if_entry->d_name[0] == '.'){
1232
return 0;
1233
}
1234
1235
struct ifreq ifr;
1236
1160
if(not get_flags(if_entry->d_name, &ifr)){
1237
if(debug){
1238
fprintf(stderr, "Mandos plugin mandos-client: "
1239
"Failed to get flags for interface \"%s\"\n",
1240
if_entry->d_name);
1241
}
1242
return 0;
1243
}
1244
1245
/* Reject down interfaces */
1246
if(not (ifr.ifr_flags & IFF_UP)){
1247
if(debug){
1248
fprintf(stderr, "Mandos plugin mandos-client: "
1249
"Rejecting down interface \"%s\"\n",
1250
if_entry->d_name);
1251
}
1252
return 0;
1253
}
1254
1255
/* Reject non-running interfaces */
1256
if(not (ifr.ifr_flags & IFF_RUNNING)){
1257
if(debug){
1258
fprintf(stderr, "Mandos plugin mandos-client: "
1259
"Rejecting non-running interface \"%s\"\n",
1260
if_entry->d_name);
1261
}
1262
1161
return 0;
1263
1162
}
1264
1163
1279
1178
return 1;
1280
1179
}
1281
1180
1282
/* Is this directory entry a runnable program? */
1283
int runnable_hook(const struct dirent *direntry){
1284
int ret;
1285
struct stat st;
1286
1287
if((direntry->d_name)[0] == '\0'){
1288
/* Empty name? */
1289
return 0;
1290
}
1291
1292
/* Save pointer to last character */
1293
char *end = strchr(direntry->d_name, '\0')-1;
1294
1295
if(*end == '~'){
1296
/* Backup name~ */
1297
return 0;
1298
}
1299
1300
if(((direntry->d_name)[0] == '#')
1301
and (*end == '#')){
1302
/* Temporary #name# */
1303
return 0;
1304
}
1305
1306
/* XXX more rules here */
1307
1308
char *fullname = NULL;
1309
ret = asprintf(&fullname, "%s/%s", hookdir,
1310
direntry->d_name);
1311
if(ret < 0){
1312
perror_plus("asprintf");
1313
return 0;
1314
}
1315
1316
ret = stat(fullname, &st);
1317
if(ret == -1){
1318
if(debug){
1319
perror_plus("Could not stat plugin");
1320
}
1321
return 0;
1322
}
1323
if(not (S_ISREG(st.st_mode))){
1324
/* Not a regular file */
1325
return 0;
1326
}
1327
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1328
/* Not executable */
1329
return 0;
1330
}
1331
return 1;
1332
}
1333
1334
1181
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1335
1182
int ret;
1336
1183
struct timespec now;
1340
1187
while(true){
1341
1188
if(mc.current_server == NULL){
1342
1189
if (debug){
1343
fprintf(stderr, "Mandos plugin mandos-client: "
1190
fprintf(stderr,
1344
1191
"Wait until first server is found. No timeout!\n");
1345
1192
}
1346
1193
ret = avahi_simple_poll_iterate(s, -1);
1347
1194
} else {
1348
1195
if (debug){
1349
fprintf(stderr, "Mandos plugin mandos-client: "
1350
"Check current_server if we should run it,"
1196
fprintf(stderr, "Check current_server if we should run it,"
1351
1197
" or wait\n");
1352
1198
}
1353
1199
/* the current time */
1370
1216
- ((intmax_t)waited_time.tv_nsec / 1000000));
1371
1217
1372
1218
if (debug){
1373
fprintf(stderr, "Mandos plugin mandos-client: "
1374
"Blocking for %" PRIdMAX " ms\n", block_time);
1219
fprintf(stderr, "Blocking for %" PRIdMAX " ms\n", block_time);
1375
1220
}
1376
1221
1377
1222
if(block_time <= 0){
1397
1242
ret = avahi_simple_poll_iterate(s, (int)block_time);
1398
1243
}
1399
1244
if(ret != 0){
1400
if (ret > 0 or errno != EINTR){
1245
if (ret > 0 or errno != EINTR) {
1401
1246
return (ret != 1) ? ret : 0;
1402
1247
}
1403
1248
}
1491
1336
.arg = "SECONDS",
1492
1337
.doc = "Retry interval used when denied by the mandos server",
1493
1338
.group = 2 },
1494
{ .name = "network-hook-dir", .key = 133,
1495
.arg = "DIR",
1496
.doc = "Directory where network hooks are located",
1497
.group = 2 },
1498
1339
/*
1499
1340
* These reproduce what we would get without ARGP_NO_HELP
1500
1341
*/
1553
1394
argp_error(state, "Bad retry interval");
1554
1395
}
1555
1396
break;
1556
case 133: /* --network-hook-dir */
1557
hookdir = arg;
1558
break;
1559
1397
/*
1560
1398
* These reproduce what we would get without ARGP_NO_HELP
1561
1399
*/
1567
1405
argp_state_help(state, state->out_stream,
1568
1406
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1569
1407
case 'V': /* --version */
1570
fprintf(state->out_stream, "Mandos plugin mandos-client: ");
1571
1408
fprintf(state->out_stream, "%s\n", argp_program_version);
1572
1409
exit(argp_err_exit_status);
1573
1410
break;
1658
1495
}
1659
1496
}
1660
1497
1661
/* Find network hooks and run them */
1662
{
1663
struct dirent **direntries;
1664
struct dirent *direntry;
1665
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1666
alphasort);
1667
if(numhooks == -1){
1668
perror_plus("scandir");
1669
} else {
1670
int devnull = open("/dev/null", O_RDONLY);
1671
for(int i = 0; i < numhooks; i++){
1672
direntry = direntries[0];
1673
char *fullname = NULL;
1674
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1675
if(ret < 0){
1676
perror_plus("asprintf");
1677
continue;
1678
}
1679
pid_t hook_pid = fork();
1680
if(hook_pid == 0){
1681
/* Child */
1682
dup2(devnull, STDIN_FILENO);
1683
close(devnull);
1684
dup2(STDERR_FILENO, STDOUT_FILENO);
1685
ret = setenv("DEVICE", interface, 1);
1686
if(ret == -1){
1687
perror_plus("setenv");
1688
exit(1);
1689
}
1690
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1691
if(ret == -1){
1692
perror_plus("setenv");
1693
exit(1);
1694
}
1695
ret = setenv("MODE", "start", 1);
1696
if(ret == -1){
1697
perror_plus("setenv");
1698
exit(1);
1699
}
1700
char *delaystring;
1701
ret = asprintf(&delaystring, "%f", delay);
1702
if(ret == -1){
1703
perror_plus("asprintf");
1704
exit(1);
1705
}
1706
ret = setenv("DELAY", delaystring, 1);
1707
if(ret == -1){
1708
free(delaystring);
1709
perror_plus("setenv");
1710
exit(1);
1711
}
1712
free(delaystring);
1713
ret = execl(fullname, direntry->d_name, "start", NULL);
1714
perror_plus("execl");
1715
} else {
1716
int status;
1717
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1718
perror_plus("waitpid");
1719
free(fullname);
1720
continue;
1721
}
1722
if(WIFEXITED(status)){
1723
if(WEXITSTATUS(status) != 0){
1724
fprintf(stderr, "Mandos plugin mandos-client: "
1725
"Warning: network hook \"%s\" exited"
1726
" with status %d\n", direntry->d_name,
1727
WEXITSTATUS(status));
1728
free(fullname);
1729
continue;
1730
}
1731
} else if(WIFSIGNALED(status)){
1732
fprintf(stderr, "Mandos plugin mandos-client: "
1733
"Warning: network hook \"%s\" died by"
1734
" signal %d\n", direntry->d_name,
1735
WTERMSIG(status));
1736
free(fullname);
1737
continue;
1738
} else {
1739
fprintf(stderr, "Mandos plugin mandos-client: "
1740
"Warning: network hook \"%s\" crashed\n",
1741
direntry->d_name);
1742
free(fullname);
1743
continue;
1744
}
1745
}
1746
free(fullname);
1747
if(quit_now){
1748
goto end;
1749
}
1750
}
1751
close(devnull);
1752
}
1753
}
1754
1755
1498
if(not debug){
1756
1499
avahi_set_log_function(empty_log);
1757
1500
}
1758
1501
1759
1502
if(interface[0] == '\0'){
1760
1503
struct dirent **direntries;
1761
/* First look for interfaces that are up */
1762
ret = scandir(sys_class_net, &direntries, up_interface,
1504
ret = scandir(sys_class_net, &direntries, good_interface,
1763
1505
alphasort);
1764
if(ret == 0){
1765
/* No up interfaces, look for any good interfaces */
1766
free(direntries);
1767
ret = scandir(sys_class_net, &direntries, good_interface,
1768
alphasort);
1769
}
1770
1506
if(ret >= 1){
1771
/* Pick the first interface returned */
1507
/* Pick the first good interface */
1772
1508
interface = strdup(direntries[0]->d_name);
1773
1509
if(debug){
1774
fprintf(stderr, "Mandos plugin mandos-client: "
1775
"Using interface \"%s\"\n", interface);
1510
fprintf(stderr, "Using interface \"%s\"\n", interface);
1776
1511
}
1777
1512
if(interface == NULL){
1778
1513
perror_plus("malloc");
1783
1518
free(direntries);
1784
1519
} else {
1785
1520
free(direntries);
1786
fprintf(stderr, "Mandos plugin mandos-client: "
1787
"Could not find a network interface\n");
1521
fprintf(stderr, "Could not find a network interface\n");
1788
1522
exitcode = EXIT_FAILURE;
1789
1523
goto end;
1790
1524
}
1796
1530
srand((unsigned int) time(NULL));
1797
1531
mc.simple_poll = avahi_simple_poll_new();
1798
1532
if(mc.simple_poll == NULL){
1799
fprintf(stderr, "Mandos plugin mandos-client: "
1800
"Avahi: Failed to create simple poll object.\n");
1533
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1801
1534
exitcode = EX_UNAVAILABLE;
1802
1535
goto end;
1803
1536
}
1869
1602
if(strcmp(interface, "none") != 0){
1870
1603
if_index = (AvahiIfIndex) if_nametoindex(interface);
1871
1604
if(if_index == 0){
1872
fprintf(stderr, "Mandos plugin mandos-client: "
1873
"No such interface: \"%s\"\n", interface);
1605
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1874
1606
exitcode = EX_UNAVAILABLE;
1875
1607
goto end;
1876
1608
}
2017
1749
2018
1750
ret = init_gnutls_global(pubkey, seckey);
2019
1751
if(ret == -1){
2020
fprintf(stderr, "Mandos plugin mandos-client: "
2021
"init_gnutls_global failed\n");
1752
fprintf(stderr, "init_gnutls_global failed\n");
2022
1753
exitcode = EX_UNAVAILABLE;
2023
1754
goto end;
2024
1755
} else {
2040
1771
}
2041
1772
2042
1773
if(not init_gpgme(pubkey, seckey, tempdir)){
2043
fprintf(stderr, "Mandos plugin mandos-client: "
2044
"init_gpgme failed\n");
1774
fprintf(stderr, "init_gpgme failed\n");
2045
1775
exitcode = EX_UNAVAILABLE;
2046
1776
goto end;
2047
1777
} else {
2057
1787
/* (Mainly meant for debugging) */
2058
1788
char *address = strrchr(connect_to, ':');
2059
1789
if(address == NULL){
2060
fprintf(stderr, "Mandos plugin mandos-client: "
2061
"No colon in address\n");
1790
fprintf(stderr, "No colon in address\n");
2062
1791
exitcode = EX_USAGE;
2063
1792
goto end;
2064
1793
}
2072
1801
tmpmax = strtoimax(address+1, &tmp, 10);
2073
1802
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2074
1803
or tmpmax != (uint16_t)tmpmax){
2075
fprintf(stderr, "Mandos plugin mandos-client: "
2076
"Bad port number\n");
1804
fprintf(stderr, "Bad port number\n");
2077
1805
exitcode = EX_USAGE;
2078
1806
goto end;
2079
1807
}
2109
1837
break;
2110
1838
}
2111
1839
if(debug){
2112
fprintf(stderr, "Mandos plugin mandos-client: "
2113
"Retrying in %d seconds\n", (int)retry_interval);
1840
fprintf(stderr, "Retrying in %d seconds\n",
1841
(int)retry_interval);
2114
1842
}
2115
1843
sleep((int)retry_interval);
2116
1844
}
2118
1846
if (not quit_now){
2119
1847
exitcode = EXIT_SUCCESS;
2120
1848
}
2121
1849
2122
1850
goto end;
2123
1851
}
2124
1852
2146
1874
2147
1875
/* Check if creating the Avahi server object succeeded */
2148
1876
if(mc.server == NULL){
2149
fprintf(stderr, "Mandos plugin mandos-client: "
2150
"Failed to create Avahi server: %s\n",
1877
fprintf(stderr, "Failed to create Avahi server: %s\n",
2151
1878
avahi_strerror(error));
2152
1879
exitcode = EX_UNAVAILABLE;
2153
1880
goto end;
2162
1889
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2163
1890
NULL, 0, browse_callback, NULL);
2164
1891
if(sb == NULL){
2165
fprintf(stderr, "Mandos plugin mandos-client: "
2166
"Failed to create service browser: %s\n",
1892
fprintf(stderr, "Failed to create service browser: %s\n",
2167
1893
avahi_strerror(avahi_server_errno(mc.server)));
2168
1894
exitcode = EX_UNAVAILABLE;
2169
1895
goto end;
2176
1902
/* Run the main loop */
2177
1903
2178
1904
if(debug){
2179
fprintf(stderr, "Mandos plugin mandos-client: "
2180
"Starting Avahi loop search\n");
1905
fprintf(stderr, "Starting Avahi loop search\n");
2181
1906
}
2182
1907
2183
1908
ret = avahi_loop_with_timeout(mc.simple_poll,
2184
1909
(int)(retry_interval * 1000));
2185
1910
if(debug){
2186
fprintf(stderr, "Mandos plugin mandos-client: "
2187
"avahi_loop_with_timeout exited %s\n",
1911
fprintf(stderr, "avahi_loop_with_timeout exited %s\n",
2188
1912
(ret == 0) ? "successfully" : "with error");
2189
1913
}
2190
1914
2191
1915
end:
2192
1916
2193
1917
if(debug){
2194
fprintf(stderr, "Mandos plugin mandos-client: "
2195
"%s exiting\n", argv[0]);
1918
fprintf(stderr, "%s exiting\n", argv[0]);
2196
1919
}
2197
1920
2198
1921
/* Cleanup things */
2226
1949
}
2227
1950
}
2228
1951
2229
/* XXX run network hooks "stop" here */
2230
2231
1952
/* Take down the network interface */
2232
1953
if(take_down_interface){
2233
1954
/* Re-raise priviliges */
2240
1961
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2241
1962
if(ret == -1){
2242
1963
perror_plus("ioctl SIOCGIFFLAGS");
2243
} else if(network.ifr_flags & IFF_UP){
1964
} else if(network.ifr_flags & IFF_UP) {
2244
1965
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2245
1966
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2246
1967
if(ret == -1){
2278
1999
}
2279
2000
ret = remove(fullname);
2280
2001
if(ret == -1){
2281
fprintf(stderr, "Mandos plugin mandos-client: "
2282
"remove(\"%s\"): %s\n", fullname, strerror(errno));
2002
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
2003
strerror(errno));
2283
2004
}
2284
2005
free(fullname);
2285
2006
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0