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- Committer: teddy at bsnet
- Date: 2011-11-12 17:43:12 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-20111112174312-a227djujmo3oxw9m
* plugins.d/mandos-client.c (runnable_hook): Bug fix: stat using the
full path.
(mail): Take new "--network-hook-dir" option.
full path.
(mail): Take new "--network-hook-dir" option.
- files modified:
- Makefile
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() */
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";
130
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;
136
const char *hookdir = HOOKDIR;
133
137
134
138
/* Doubly linked list that need to be circularly linked when used */
135
139
typedef struct server{
250
254
251
255
rc = gpgme_data_new_from_fd(&pgp_data, fd);
252
256
if(rc != GPG_ERR_NO_ERROR){
253
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
257
fprintf(stderr, "Mandos plugin mandos-client: "
258
"bad gpgme_data_new_from_fd: %s: %s\n",
254
259
gpgme_strsource(rc), gpgme_strerror(rc));
255
260
return false;
256
261
}
257
262
258
263
rc = gpgme_op_import(mc.ctx, pgp_data);
259
264
if(rc != GPG_ERR_NO_ERROR){
260
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
265
fprintf(stderr, "Mandos plugin mandos-client: "
266
"bad gpgme_op_import: %s: %s\n",
261
267
gpgme_strsource(rc), gpgme_strerror(rc));
262
268
return false;
263
269
}
271
277
}
272
278
273
279
if(debug){
274
fprintf(stderr, "Initializing GPGME\n");
280
fprintf(stderr, "Mandos plugin mandos-client: "
281
"Initializing GPGME\n");
275
282
}
276
283
277
284
/* Init GPGME */
278
285
gpgme_check_version(NULL);
279
286
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
280
287
if(rc != GPG_ERR_NO_ERROR){
281
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
288
fprintf(stderr, "Mandos plugin mandos-client: "
289
"bad gpgme_engine_check_version: %s: %s\n",
282
290
gpgme_strsource(rc), gpgme_strerror(rc));
283
291
return false;
284
292
}
286
294
/* Set GPGME home directory for the OpenPGP engine only */
287
295
rc = gpgme_get_engine_info(&engine_info);
288
296
if(rc != GPG_ERR_NO_ERROR){
289
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
297
fprintf(stderr, "Mandos plugin mandos-client: "
298
"bad gpgme_get_engine_info: %s: %s\n",
290
299
gpgme_strsource(rc), gpgme_strerror(rc));
291
300
return false;
292
301
}
299
308
engine_info = engine_info->next;
300
309
}
301
310
if(engine_info == NULL){
302
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
311
fprintf(stderr, "Mandos plugin mandos-client: "
312
"Could not set GPGME home dir to %s\n", tempdir);
303
313
return false;
304
314
}
305
315
306
316
/* Create new GPGME "context" */
307
317
rc = gpgme_new(&(mc.ctx));
308
318
if(rc != GPG_ERR_NO_ERROR){
309
fprintf(stderr, "bad gpgme_new: %s: %s\n",
310
gpgme_strsource(rc), gpgme_strerror(rc));
319
fprintf(stderr, "Mandos plugin mandos-client: "
320
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
321
gpgme_strerror(rc));
311
322
return false;
312
323
}
313
324
332
343
ssize_t plaintext_length = 0;
333
344
334
345
if(debug){
335
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
346
fprintf(stderr, "Mandos plugin mandos-client: "
347
"Trying to decrypt OpenPGP data\n");
336
348
}
337
349
338
350
/* Create new GPGME data buffer from memory cryptotext */
339
351
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
340
352
0);
341
353
if(rc != GPG_ERR_NO_ERROR){
342
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
354
fprintf(stderr, "Mandos plugin mandos-client: "
355
"bad gpgme_data_new_from_mem: %s: %s\n",
343
356
gpgme_strsource(rc), gpgme_strerror(rc));
344
357
return -1;
345
358
}
347
360
/* Create new empty GPGME data buffer for the plaintext */
348
361
rc = gpgme_data_new(&dh_plain);
349
362
if(rc != GPG_ERR_NO_ERROR){
350
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
363
fprintf(stderr, "Mandos plugin mandos-client: "
364
"bad gpgme_data_new: %s: %s\n",
351
365
gpgme_strsource(rc), gpgme_strerror(rc));
352
366
gpgme_data_release(dh_crypto);
353
367
return -1;
357
371
data buffer */
358
372
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
359
373
if(rc != GPG_ERR_NO_ERROR){
360
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
374
fprintf(stderr, "Mandos plugin mandos-client: "
375
"bad gpgme_op_decrypt: %s: %s\n",
361
376
gpgme_strsource(rc), gpgme_strerror(rc));
362
377
plaintext_length = -1;
363
378
if(debug){
364
379
gpgme_decrypt_result_t result;
365
380
result = gpgme_op_decrypt_result(mc.ctx);
366
381
if(result == NULL){
367
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
382
fprintf(stderr, "Mandos plugin mandos-client: "
383
"gpgme_op_decrypt_result failed\n");
368
384
} else {
369
fprintf(stderr, "Unsupported algorithm: %s\n",
385
fprintf(stderr, "Mandos plugin mandos-client: "
386
"Unsupported algorithm: %s\n",
370
387
result->unsupported_algorithm);
371
fprintf(stderr, "Wrong key usage: %u\n",
388
fprintf(stderr, "Mandos plugin mandos-client: "
389
"Wrong key usage: %u\n",
372
390
result->wrong_key_usage);
373
391
if(result->file_name != NULL){
374
fprintf(stderr, "File name: %s\n", result->file_name);
392
fprintf(stderr, "Mandos plugin mandos-client: "
393
"File name: %s\n", result->file_name);
375
394
}
376
395
gpgme_recipient_t recipient;
377
396
recipient = result->recipients;
378
397
while(recipient != NULL){
379
fprintf(stderr, "Public key algorithm: %s\n",
398
fprintf(stderr, "Mandos plugin mandos-client: "
399
"Public key algorithm: %s\n",
380
400
gpgme_pubkey_algo_name(recipient->pubkey_algo));
381
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
382
fprintf(stderr, "Secret key available: %s\n",
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",
383
405
recipient->status == GPG_ERR_NO_SECKEY
384
406
? "No" : "Yes");
385
407
recipient = recipient->next;
390
412
}
391
413
392
414
if(debug){
393
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
415
fprintf(stderr, "Mandos plugin mandos-client: "
416
"Decryption of OpenPGP data succeeded\n");
394
417
}
395
418
396
419
/* Seek back to the beginning of the GPGME plaintext data buffer */
427
450
}
428
451
429
452
if(debug){
430
fprintf(stderr, "Decrypted password is: ");
453
fprintf(stderr, "Mandos plugin mandos-client: "
454
"Decrypted password is: ");
431
455
for(ssize_t i = 0; i < plaintext_length; i++){
432
456
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
433
457
}
455
479
/* GnuTLS log function callback */
456
480
static void debuggnutls(__attribute__((unused)) int level,
457
481
const char* string){
458
fprintf(stderr, "GnuTLS: %s", string);
482
fprintf(stderr, "Mandos plugin mandos-client: GnuTLS: %s", string);
459
483
}
460
484
461
485
static int init_gnutls_global(const char *pubkeyfilename,
463
487
int ret;
464
488
465
489
if(debug){
466
fprintf(stderr, "Initializing GnuTLS\n");
490
fprintf(stderr, "Mandos plugin mandos-client: "
491
"Initializing GnuTLS\n");
467
492
}
468
493
469
494
ret = gnutls_global_init();
470
495
if(ret != GNUTLS_E_SUCCESS){
471
fprintf(stderr, "GnuTLS global_init: %s\n",
472
safer_gnutls_strerror(ret));
496
fprintf(stderr, "Mandos plugin mandos-client: "
497
"GnuTLS global_init: %s\n", safer_gnutls_strerror(ret));
473
498
return -1;
474
499
}
475
500
484
509
/* OpenPGP credentials */
485
510
ret = gnutls_certificate_allocate_credentials(&mc.cred);
486
511
if(ret != GNUTLS_E_SUCCESS){
487
fprintf(stderr, "GnuTLS memory error: %s\n",
488
safer_gnutls_strerror(ret));
512
fprintf(stderr, "Mandos plugin mandos-client: "
513
"GnuTLS memory error: %s\n", safer_gnutls_strerror(ret));
489
514
gnutls_global_deinit();
490
515
return -1;
491
516
}
492
517
493
518
if(debug){
494
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
519
fprintf(stderr, "Mandos plugin mandos-client: "
520
"Attempting to use OpenPGP public key %s and"
495
521
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
496
522
seckeyfilename);
497
523
}
501
527
GNUTLS_OPENPGP_FMT_BASE64);
502
528
if(ret != GNUTLS_E_SUCCESS){
503
529
fprintf(stderr,
530
"Mandos plugin mandos-client: "
504
531
"Error[%d] while reading the OpenPGP key pair ('%s',"
505
532
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
506
fprintf(stderr, "The GnuTLS error is: %s\n",
507
safer_gnutls_strerror(ret));
533
fprintf(stderr, "Mandos plugin mandos-client: "
534
"The GnuTLS error is: %s\n", safer_gnutls_strerror(ret));
508
535
goto globalfail;
509
536
}
510
537
511
538
/* GnuTLS server initialization */
512
539
ret = gnutls_dh_params_init(&mc.dh_params);
513
540
if(ret != GNUTLS_E_SUCCESS){
514
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
541
fprintf(stderr, "Mandos plugin mandos-client: "
542
"Error in GnuTLS DH parameter initialization:"
515
543
" %s\n", safer_gnutls_strerror(ret));
516
544
goto globalfail;
517
545
}
518
546
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
519
547
if(ret != GNUTLS_E_SUCCESS){
520
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
548
fprintf(stderr, "Mandos plugin mandos-client: "
549
"Error in GnuTLS prime generation: %s\n",
521
550
safer_gnutls_strerror(ret));
522
551
goto globalfail;
523
552
}
544
573
}
545
574
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
546
575
if(ret != GNUTLS_E_SUCCESS){
547
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
576
fprintf(stderr, "Mandos plugin mandos-client: "
577
"Error in GnuTLS session initialization: %s\n",
548
578
safer_gnutls_strerror(ret));
549
579
}
550
580
558
588
}
559
589
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
560
590
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));
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));
564
595
gnutls_deinit(*session);
565
596
return -1;
566
597
}
575
606
}
576
607
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
577
608
if(ret != GNUTLS_E_SUCCESS){
578
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
609
fprintf(stderr, "Mandos plugin mandos-client: "
610
"Error setting GnuTLS credentials: %s\n",
579
611
safer_gnutls_strerror(ret));
580
612
gnutls_deinit(*session);
581
613
return -1;
627
659
pf = PF_INET;
628
660
break;
629
661
default:
630
fprintf(stderr, "Bad address family: %d\n", af);
662
fprintf(stderr, "Mandos plugin mandos-client: "
663
"Bad address family: %d\n", af);
631
664
errno = EINVAL;
632
665
return -1;
633
666
}
638
671
}
639
672
640
673
if(debug){
641
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
674
fprintf(stderr, "Mandos plugin mandos-client: "
675
"Setting up a TCP connection to %s, port %" PRIu16
642
676
"\n", ip, port);
643
677
}
644
678
671
705
}
672
706
if(ret == 0){
673
707
int e = errno;
674
fprintf(stderr, "Bad address: %s\n", ip);
708
fprintf(stderr, "Mandos plugin mandos-client: "
709
"Bad address: %s\n", ip);
675
710
errno = e;
676
711
goto mandos_end;
677
712
}
684
719
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
685
720
-Wunreachable-code*/
686
721
if(if_index == AVAHI_IF_UNSPEC){
687
fprintf(stderr, "An IPv6 link-local address is incomplete"
722
fprintf(stderr, "Mandos plugin mandos-client: "
723
"An IPv6 link-local address is incomplete"
688
724
" without a network interface\n");
689
725
errno = EINVAL;
690
726
goto mandos_end;
709
745
if(if_indextoname((unsigned int)if_index, interface) == NULL){
710
746
perror_plus("if_indextoname");
711
747
} else {
712
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
748
fprintf(stderr, "Mandos plugin mandos-client: "
749
"Connection to: %s%%%s, port %" PRIu16 "\n",
713
750
ip, interface, port);
714
751
}
715
752
} else {
716
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
717
port);
753
fprintf(stderr, "Mandos plugin mandos-client: "
754
"Connection to: %s, port %" PRIu16 "\n", ip, port);
718
755
}
719
756
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
720
757
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
730
767
perror_plus("inet_ntop");
731
768
} else {
732
769
if(strcmp(addrstr, ip) != 0){
733
fprintf(stderr, "Canonical address form: %s\n", addrstr);
770
fprintf(stderr, "Mandos plugin mandos-client: "
771
"Canonical address form: %s\n", addrstr);
734
772
}
735
773
}
736
774
}
790
828
}
791
829
792
830
if(debug){
793
fprintf(stderr, "Establishing TLS session with %s\n", ip);
831
fprintf(stderr, "Mandos plugin mandos-client: "
832
"Establishing TLS session with %s\n", ip);
794
833
}
795
834
796
835
if(quit_now){
816
855
817
856
if(ret != GNUTLS_E_SUCCESS){
818
857
if(debug){
819
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
858
fprintf(stderr, "Mandos plugin mandos-client: "
859
"*** GnuTLS Handshake failed ***\n");
820
860
gnutls_perror(ret);
821
861
}
822
862
errno = EPROTO;
826
866
/* Read OpenPGP packet that contains the wanted password */
827
867
828
868
if(debug){
829
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
830
ip);
869
fprintf(stderr, "Mandos plugin mandos-client: "
870
"Retrieving OpenPGP encrypted password from %s\n", ip);
831
871
}
832
872
833
873
while(true){
871
911
}
872
912
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
873
913
if(ret < 0){
874
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
914
fprintf(stderr, "Mandos plugin mandos-client: "
915
"*** GnuTLS Re-handshake failed ***\n");
875
916
gnutls_perror(ret);
876
917
errno = EPROTO;
877
918
goto mandos_end;
878
919
}
879
920
break;
880
921
default:
881
fprintf(stderr, "Unknown error while reading data from"
922
fprintf(stderr, "Mandos plugin mandos-client: "
923
"Unknown error while reading data from"
882
924
" encrypted session with Mandos server\n");
883
925
gnutls_bye(session, GNUTLS_SHUT_RDWR);
884
926
errno = EIO;
890
932
}
891
933
892
934
if(debug){
893
fprintf(stderr, "Closing TLS session\n");
935
fprintf(stderr, "Mandos plugin mandos-client: "
936
"Closing TLS session\n");
894
937
}
895
938
896
939
if(quit_now){
926
969
if(ret == 0 and ferror(stdout)){
927
970
int e = errno;
928
971
if(debug){
929
fprintf(stderr, "Error writing encrypted data: %s\n",
972
fprintf(stderr, "Mandos plugin mandos-client: "
973
"Error writing encrypted data: %s\n",
930
974
strerror(errno));
931
975
}
932
976
errno = e;
990
1034
switch(event){
991
1035
default:
992
1036
case AVAHI_RESOLVER_FAILURE:
993
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
1037
fprintf(stderr, "Mandos plugin mandos-client: "
1038
"(Avahi Resolver) Failed to resolve service '%s'"
994
1039
" of type '%s' in domain '%s': %s\n", name, type, domain,
995
1040
avahi_strerror(avahi_server_errno(mc.server)));
996
1041
break;
1000
1045
char ip[AVAHI_ADDRESS_STR_MAX];
1001
1046
avahi_address_snprint(ip, sizeof(ip), address);
1002
1047
if(debug){
1003
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
1048
fprintf(stderr, "Mandos plugin mandos-client: "
1049
"Mandos server \"%s\" found on %s (%s, %"
1004
1050
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
1005
1051
ip, (intmax_t)interface, port);
1006
1052
}
1040
1086
default:
1041
1087
case AVAHI_BROWSER_FAILURE:
1042
1088
1043
fprintf(stderr, "(Avahi browser) %s\n",
1089
fprintf(stderr, "Mandos plugin mandos-client: "
1090
"(Avahi browser) %s\n",
1044
1091
avahi_strerror(avahi_server_errno(mc.server)));
1045
1092
avahi_simple_poll_quit(mc.simple_poll);
1046
1093
return;
1054
1101
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1055
1102
name, type, domain, protocol, 0,
1056
1103
resolve_callback, NULL) == NULL)
1057
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
1104
fprintf(stderr, "Mandos plugin mandos-client: "
1105
"Avahi: Failed to resolve service '%s': %s\n",
1058
1106
name, avahi_strerror(avahi_server_errno(mc.server)));
1059
1107
break;
1060
1108
1064
1112
case AVAHI_BROWSER_ALL_FOR_NOW:
1065
1113
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1066
1114
if(debug){
1067
fprintf(stderr, "No Mandos server found, still searching...\n");
1115
fprintf(stderr, "Mandos plugin mandos-client: "
1116
"No Mandos server found, still searching...\n");
1068
1117
}
1069
1118
break;
1070
1119
}
1085
1134
errno = old_errno;
1086
1135
}
1087
1136
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){
1137
bool get_flags(const char *ifname, struct ifreq *ifr){
1138
int ret;
1139
1140
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1141
if(s < 0){
1142
perror_plus("socket");
1143
return false;
1144
}
1145
strcpy(ifr->ifr_name, ifname);
1146
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1147
if(ret == -1){
1144
1148
if(debug){
1145
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1146
flagstring, if_entry->d_name);
1149
perror_plus("ioctl SIOCGIFFLAGS");
1147
1150
}
1148
free(flagstring);
1149
return 0;
1151
return false;
1150
1152
}
1151
free(flagstring);
1152
ifreq_flags flags = (ifreq_flags)tmpmax;
1153
return true;
1154
}
1155
1156
bool good_flags(const char *ifname, const struct ifreq *ifr){
1157
1153
1158
/* Reject the loopback device */
1154
if(flags & IFF_LOOPBACK){
1159
if(ifr->ifr_flags & IFF_LOOPBACK){
1155
1160
if(debug){
1156
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1157
if_entry->d_name);
1161
fprintf(stderr, "Mandos plugin mandos-client: "
1162
"Rejecting loopback interface \"%s\"\n", ifname);
1158
1163
}
1159
return 0;
1164
return false;
1160
1165
}
1161
1166
/* Accept point-to-point devices only if connect_to is specified */
1162
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1167
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1163
1168
if(debug){
1164
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1165
if_entry->d_name);
1169
fprintf(stderr, "Mandos plugin mandos-client: "
1170
"Accepting point-to-point interface \"%s\"\n", ifname);
1166
1171
}
1167
return 1;
1172
return true;
1168
1173
}
1169
1174
/* Otherwise, reject non-broadcast-capable devices */
1170
if(not (flags & IFF_BROADCAST)){
1175
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1171
1176
if(debug){
1172
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1173
if_entry->d_name);
1177
fprintf(stderr, "Mandos plugin mandos-client: "
1178
"Rejecting non-broadcast interface \"%s\"\n", ifname);
1174
1179
}
1175
return 0;
1180
return false;
1176
1181
}
1177
1182
/* Reject non-ARP interfaces (including dummy interfaces) */
1178
if(flags & IFF_NOARP){
1183
if(ifr->ifr_flags & IFF_NOARP){
1179
1184
if(debug){
1180
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n",
1181
if_entry->d_name);
1185
fprintf(stderr, "Mandos plugin mandos-client: "
1186
"Rejecting non-ARP interface \"%s\"\n", ifname);
1182
1187
}
1183
return 0;
1188
return false;
1184
1189
}
1190
1185
1191
/* Accept this device */
1186
1192
if(debug){
1187
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1188
if_entry->d_name);
1193
fprintf(stderr, "Mandos plugin mandos-client: "
1194
"Interface \"%s\" is good\n", ifname);
1195
}
1196
return true;
1197
}
1198
1199
/*
1200
* This function determines if a directory entry in /sys/class/net
1201
* corresponds to an acceptable network device.
1202
* (This function is passed to scandir(3) as a filter function.)
1203
*/
1204
int good_interface(const struct dirent *if_entry){
1205
if(if_entry->d_name[0] == '.'){
1206
return 0;
1207
}
1208
1209
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
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
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
return 0;
1263
}
1264
1265
if(not good_flags(if_entry->d_name, &ifr)){
1266
return 0;
1189
1267
}
1190
1268
return 1;
1191
1269
}
1201
1279
return 1;
1202
1280
}
1203
1281
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
1204
1334
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1205
1335
int ret;
1206
1336
struct timespec now;
1210
1340
while(true){
1211
1341
if(mc.current_server == NULL){
1212
1342
if (debug){
1213
fprintf(stderr,
1343
fprintf(stderr, "Mandos plugin mandos-client: "
1214
1344
"Wait until first server is found. No timeout!\n");
1215
1345
}
1216
1346
ret = avahi_simple_poll_iterate(s, -1);
1217
1347
} else {
1218
1348
if (debug){
1219
fprintf(stderr, "Check current_server if we should run it,"
1349
fprintf(stderr, "Mandos plugin mandos-client: "
1350
"Check current_server if we should run it,"
1220
1351
" or wait\n");
1221
1352
}
1222
1353
/* the current time */
1239
1370
- ((intmax_t)waited_time.tv_nsec / 1000000));
1240
1371
1241
1372
if (debug){
1242
fprintf(stderr, "Blocking for %" PRIdMAX " ms\n", block_time);
1373
fprintf(stderr, "Mandos plugin mandos-client: "
1374
"Blocking for %" PRIdMAX " ms\n", block_time);
1243
1375
}
1244
1376
1245
1377
if(block_time <= 0){
1265
1397
ret = avahi_simple_poll_iterate(s, (int)block_time);
1266
1398
}
1267
1399
if(ret != 0){
1268
if (ret > 0 or errno != EINTR) {
1400
if (ret > 0 or errno != EINTR){
1269
1401
return (ret != 1) ? ret : 0;
1270
1402
}
1271
1403
}
1359
1491
.arg = "SECONDS",
1360
1492
.doc = "Retry interval used when denied by the mandos server",
1361
1493
.group = 2 },
1494
{ .name = "network-hook-dir", .key = 133,
1495
.arg = "DIR",
1496
.doc = "Directory where network hooks are located",
1497
.group = 2 },
1362
1498
/*
1363
1499
* These reproduce what we would get without ARGP_NO_HELP
1364
1500
*/
1417
1553
argp_error(state, "Bad retry interval");
1418
1554
}
1419
1555
break;
1556
case 133: /* --network-hook-dir */
1557
hookdir = arg;
1558
break;
1420
1559
/*
1421
1560
* These reproduce what we would get without ARGP_NO_HELP
1422
1561
*/
1428
1567
argp_state_help(state, state->out_stream,
1429
1568
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1430
1569
case 'V': /* --version */
1570
fprintf(state->out_stream, "Mandos plugin mandos-client: ");
1431
1571
fprintf(state->out_stream, "%s\n", argp_program_version);
1432
1572
exit(argp_err_exit_status);
1433
1573
break;
1518
1658
}
1519
1659
}
1520
1660
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
1521
1755
if(not debug){
1522
1756
avahi_set_log_function(empty_log);
1523
1757
}
1524
1758
1525
1759
if(interface[0] == '\0'){
1526
1760
struct dirent **direntries;
1527
ret = scandir(sys_class_net, &direntries, good_interface,
1761
/* First look for interfaces that are up */
1762
ret = scandir(sys_class_net, &direntries, up_interface,
1528
1763
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
}
1529
1770
if(ret >= 1){
1530
/* Pick the first good interface */
1771
/* Pick the first interface returned */
1531
1772
interface = strdup(direntries[0]->d_name);
1532
1773
if(debug){
1533
fprintf(stderr, "Using interface \"%s\"\n", interface);
1774
fprintf(stderr, "Mandos plugin mandos-client: "
1775
"Using interface \"%s\"\n", interface);
1534
1776
}
1535
1777
if(interface == NULL){
1536
1778
perror_plus("malloc");
1541
1783
free(direntries);
1542
1784
} else {
1543
1785
free(direntries);
1544
fprintf(stderr, "Could not find a network interface\n");
1786
fprintf(stderr, "Mandos plugin mandos-client: "
1787
"Could not find a network interface\n");
1545
1788
exitcode = EXIT_FAILURE;
1546
1789
goto end;
1547
1790
}
1553
1796
srand((unsigned int) time(NULL));
1554
1797
mc.simple_poll = avahi_simple_poll_new();
1555
1798
if(mc.simple_poll == NULL){
1556
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1799
fprintf(stderr, "Mandos plugin mandos-client: "
1800
"Avahi: Failed to create simple poll object.\n");
1557
1801
exitcode = EX_UNAVAILABLE;
1558
1802
goto end;
1559
1803
}
1625
1869
if(strcmp(interface, "none") != 0){
1626
1870
if_index = (AvahiIfIndex) if_nametoindex(interface);
1627
1871
if(if_index == 0){
1628
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1872
fprintf(stderr, "Mandos plugin mandos-client: "
1873
"No such interface: \"%s\"\n", interface);
1629
1874
exitcode = EX_UNAVAILABLE;
1630
1875
goto end;
1631
1876
}
1772
2017
1773
2018
ret = init_gnutls_global(pubkey, seckey);
1774
2019
if(ret == -1){
1775
fprintf(stderr, "init_gnutls_global failed\n");
2020
fprintf(stderr, "Mandos plugin mandos-client: "
2021
"init_gnutls_global failed\n");
1776
2022
exitcode = EX_UNAVAILABLE;
1777
2023
goto end;
1778
2024
} else {
1794
2040
}
1795
2041
1796
2042
if(not init_gpgme(pubkey, seckey, tempdir)){
1797
fprintf(stderr, "init_gpgme failed\n");
2043
fprintf(stderr, "Mandos plugin mandos-client: "
2044
"init_gpgme failed\n");
1798
2045
exitcode = EX_UNAVAILABLE;
1799
2046
goto end;
1800
2047
} else {
1810
2057
/* (Mainly meant for debugging) */
1811
2058
char *address = strrchr(connect_to, ':');
1812
2059
if(address == NULL){
1813
fprintf(stderr, "No colon in address\n");
2060
fprintf(stderr, "Mandos plugin mandos-client: "
2061
"No colon in address\n");
1814
2062
exitcode = EX_USAGE;
1815
2063
goto end;
1816
2064
}
1824
2072
tmpmax = strtoimax(address+1, &tmp, 10);
1825
2073
if(errno != 0 or tmp == address+1 or *tmp != '\0'
1826
2074
or tmpmax != (uint16_t)tmpmax){
1827
fprintf(stderr, "Bad port number\n");
2075
fprintf(stderr, "Mandos plugin mandos-client: "
2076
"Bad port number\n");
1828
2077
exitcode = EX_USAGE;
1829
2078
goto end;
1830
2079
}
1860
2109
break;
1861
2110
}
1862
2111
if(debug){
1863
fprintf(stderr, "Retrying in %d seconds\n",
1864
(int)retry_interval);
2112
fprintf(stderr, "Mandos plugin mandos-client: "
2113
"Retrying in %d seconds\n", (int)retry_interval);
1865
2114
}
1866
2115
sleep((int)retry_interval);
1867
2116
}
1869
2118
if (not quit_now){
1870
2119
exitcode = EXIT_SUCCESS;
1871
2120
}
1872
2121
1873
2122
goto end;
1874
2123
}
1875
2124
1897
2146
1898
2147
/* Check if creating the Avahi server object succeeded */
1899
2148
if(mc.server == NULL){
1900
fprintf(stderr, "Failed to create Avahi server: %s\n",
2149
fprintf(stderr, "Mandos plugin mandos-client: "
2150
"Failed to create Avahi server: %s\n",
1901
2151
avahi_strerror(error));
1902
2152
exitcode = EX_UNAVAILABLE;
1903
2153
goto end;
1912
2162
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
1913
2163
NULL, 0, browse_callback, NULL);
1914
2164
if(sb == NULL){
1915
fprintf(stderr, "Failed to create service browser: %s\n",
2165
fprintf(stderr, "Mandos plugin mandos-client: "
2166
"Failed to create service browser: %s\n",
1916
2167
avahi_strerror(avahi_server_errno(mc.server)));
1917
2168
exitcode = EX_UNAVAILABLE;
1918
2169
goto end;
1925
2176
/* Run the main loop */
1926
2177
1927
2178
if(debug){
1928
fprintf(stderr, "Starting Avahi loop search\n");
2179
fprintf(stderr, "Mandos plugin mandos-client: "
2180
"Starting Avahi loop search\n");
1929
2181
}
1930
2182
1931
2183
ret = avahi_loop_with_timeout(mc.simple_poll,
1932
2184
(int)(retry_interval * 1000));
1933
2185
if(debug){
1934
fprintf(stderr, "avahi_loop_with_timeout exited %s\n",
2186
fprintf(stderr, "Mandos plugin mandos-client: "
2187
"avahi_loop_with_timeout exited %s\n",
1935
2188
(ret == 0) ? "successfully" : "with error");
1936
2189
}
1937
2190
1938
2191
end:
1939
2192
1940
2193
if(debug){
1941
fprintf(stderr, "%s exiting\n", argv[0]);
2194
fprintf(stderr, "Mandos plugin mandos-client: "
2195
"%s exiting\n", argv[0]);
1942
2196
}
1943
2197
1944
2198
/* Cleanup things */
1972
2226
}
1973
2227
}
1974
2228
2229
/* XXX run network hooks "stop" here */
2230
1975
2231
/* Take down the network interface */
1976
2232
if(take_down_interface){
1977
2233
/* Re-raise priviliges */
1984
2240
ret = ioctl(sd, SIOCGIFFLAGS, &network);
1985
2241
if(ret == -1){
1986
2242
perror_plus("ioctl SIOCGIFFLAGS");
1987
} else if(network.ifr_flags & IFF_UP) {
2243
} else if(network.ifr_flags & IFF_UP){
1988
2244
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
1989
2245
ret = ioctl(sd, SIOCSIFFLAGS, &network);
1990
2246
if(ret == -1){
2022
2278
}
2023
2279
ret = remove(fullname);
2024
2280
if(ret == -1){
2025
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
2026
strerror(errno));
2281
fprintf(stderr, "Mandos plugin mandos-client: "
2282
"remove(\"%s\"): %s\n", fullname, strerror(errno));
2027
2283
}
2028
2284
free(fullname);
2029
2285
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0