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- Committer: Teddy Hogeborn
- Date: 2011-11-24 20:15:24 UTC
- mto: (505.2.8 mandos-client-network-hooks)
- mto: This revision was merged to the branch mainline in revision 525.
- Revision ID: teddy@recompile.se-20111124201524-5w9ovzpuw3drdlgf
* network-hooks.d: New directory.
* network-hooks.d/bridge: New example hook.
* network-hooks.d/bridge.conf: Config file for bridge example hook.
* network-hooks.d/bridge: New example hook.
* network-hooks.d/bridge.conf: Config file for bridge example hook.
- files added:
- network-hooks.d
- files modified:
- TODO
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() */
108
110
init_gnutls_session(),
109
111
GNUTLS_* */
110
112
#include <gnutls/openpgp.h>
111
/* gnutls_certificate_set_openpgp_key_file(),
112
GNUTLS_OPENPGP_FMT_BASE64 */
113
/* gnutls_certificate_set_openpgp_key_file(),
114
GNUTLS_OPENPGP_FMT_BASE64 */
113
115
114
116
/* GPGME */
115
117
#include <gpgme.h> /* All GPGME types, constants and
131
133
const char *argp_program_bug_address = "<mandos@recompile.se>";
132
134
static const char sys_class_net[] = "/sys/class/net";
133
135
char *connect_to = NULL;
136
const char *hookdir = HOOKDIR;
134
137
135
138
/* Doubly linked list that need to be circularly linked when used */
136
139
typedef struct server{
175
178
va_list ap;
176
179
va_start (ap, format);
177
180
178
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ", program_invocation_short_name));
181
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
182
program_invocation_short_name));
179
183
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
180
184
}
181
185
185
189
* "buffer_length" is how much is already used.
186
190
*/
187
191
size_t incbuffer(char **buffer, size_t buffer_length,
188
size_t buffer_capacity){
192
size_t buffer_capacity){
189
193
if(buffer_length + BUFFER_SIZE > buffer_capacity){
190
194
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
191
195
if(buffer == NULL){
197
201
}
198
202
199
203
/* Add server to set of servers to retry periodically */
200
int add_server(const char *ip, uint16_t port,
201
AvahiIfIndex if_index,
202
int af){
204
int add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
205
int af){
203
206
int ret;
204
207
server *new_server = malloc(sizeof(server));
205
208
if(new_server == NULL){
207
210
return -1;
208
211
}
209
212
*new_server = (server){ .ip = strdup(ip),
210
.port = port,
211
.if_index = if_index,
212
.af = af };
213
.port = port,
214
.if_index = if_index,
215
.af = af };
213
216
if(new_server->ip == NULL){
214
217
perror_plus("strdup");
215
218
return -1;
237
240
/*
238
241
* Initialize GPGME.
239
242
*/
240
static bool init_gpgme(const char *seckey,
241
const char *pubkey, const char *tempdir){
243
static bool init_gpgme(const char *seckey, const char *pubkey,
244
const char *tempdir){
242
245
gpgme_error_t rc;
243
246
gpgme_engine_info_t engine_info;
244
247
259
262
260
263
rc = gpgme_data_new_from_fd(&pgp_data, fd);
261
264
if(rc != GPG_ERR_NO_ERROR){
262
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
263
gpgme_strsource(rc), gpgme_strerror(rc));
265
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
266
gpgme_strsource(rc), gpgme_strerror(rc));
264
267
return false;
265
268
}
266
269
267
270
rc = gpgme_op_import(mc.ctx, pgp_data);
268
271
if(rc != GPG_ERR_NO_ERROR){
269
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
270
gpgme_strsource(rc), gpgme_strerror(rc));
272
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
273
gpgme_strsource(rc), gpgme_strerror(rc));
271
274
return false;
272
275
}
273
276
280
283
}
281
284
282
285
if(debug){
283
fprintf(stderr, "Initializing GPGME\n");
286
fprintf_plus(stderr, "Initializing GPGME\n");
284
287
}
285
288
286
289
/* Init GPGME */
287
290
gpgme_check_version(NULL);
288
291
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
289
292
if(rc != GPG_ERR_NO_ERROR){
290
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
291
gpgme_strsource(rc), gpgme_strerror(rc));
293
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
294
gpgme_strsource(rc), gpgme_strerror(rc));
292
295
return false;
293
296
}
294
297
295
298
/* Set GPGME home directory for the OpenPGP engine only */
296
299
rc = gpgme_get_engine_info(&engine_info);
297
300
if(rc != GPG_ERR_NO_ERROR){
298
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
299
gpgme_strsource(rc), gpgme_strerror(rc));
301
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
302
gpgme_strsource(rc), gpgme_strerror(rc));
300
303
return false;
301
304
}
302
305
while(engine_info != NULL){
308
311
engine_info = engine_info->next;
309
312
}
310
313
if(engine_info == NULL){
311
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
314
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
315
tempdir);
312
316
return false;
313
317
}
314
318
315
319
/* Create new GPGME "context" */
316
320
rc = gpgme_new(&(mc.ctx));
317
321
if(rc != GPG_ERR_NO_ERROR){
318
fprintf(stderr, "bad gpgme_new: %s: %s\n",
319
gpgme_strsource(rc), gpgme_strerror(rc));
322
fprintf_plus(stderr, "Mandos plugin mandos-client: "
323
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
324
gpgme_strerror(rc));
320
325
return false;
321
326
}
322
327
341
346
ssize_t plaintext_length = 0;
342
347
343
348
if(debug){
344
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
349
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
345
350
}
346
351
347
352
/* Create new GPGME data buffer from memory cryptotext */
348
353
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
349
354
0);
350
355
if(rc != GPG_ERR_NO_ERROR){
351
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
352
gpgme_strsource(rc), gpgme_strerror(rc));
356
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
357
gpgme_strsource(rc), gpgme_strerror(rc));
353
358
return -1;
354
359
}
355
360
356
361
/* Create new empty GPGME data buffer for the plaintext */
357
362
rc = gpgme_data_new(&dh_plain);
358
363
if(rc != GPG_ERR_NO_ERROR){
359
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
360
gpgme_strsource(rc), gpgme_strerror(rc));
364
fprintf_plus(stderr, "Mandos plugin mandos-client: "
365
"bad gpgme_data_new: %s: %s\n",
366
gpgme_strsource(rc), gpgme_strerror(rc));
361
367
gpgme_data_release(dh_crypto);
362
368
return -1;
363
369
}
366
372
data buffer */
367
373
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
368
374
if(rc != GPG_ERR_NO_ERROR){
369
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
370
gpgme_strsource(rc), gpgme_strerror(rc));
375
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
376
gpgme_strsource(rc), gpgme_strerror(rc));
371
377
plaintext_length = -1;
372
378
if(debug){
373
379
gpgme_decrypt_result_t result;
374
380
result = gpgme_op_decrypt_result(mc.ctx);
375
381
if(result == NULL){
376
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
382
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
377
383
} else {
378
fprintf(stderr, "Unsupported algorithm: %s\n",
379
result->unsupported_algorithm);
380
fprintf(stderr, "Wrong key usage: %u\n",
381
result->wrong_key_usage);
384
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
385
result->unsupported_algorithm);
386
fprintf_plus(stderr, "Wrong key usage: %u\n",
387
result->wrong_key_usage);
382
388
if(result->file_name != NULL){
383
fprintf(stderr, "File name: %s\n", result->file_name);
389
fprintf_plus(stderr, "File name: %s\n", result->file_name);
384
390
}
385
391
gpgme_recipient_t recipient;
386
392
recipient = result->recipients;
387
393
while(recipient != NULL){
388
fprintf(stderr, "Public key algorithm: %s\n",
389
gpgme_pubkey_algo_name(recipient->pubkey_algo));
390
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
391
fprintf(stderr, "Secret key available: %s\n",
392
recipient->status == GPG_ERR_NO_SECKEY
393
? "No" : "Yes");
394
fprintf_plus(stderr, "Public key algorithm: %s\n",
395
gpgme_pubkey_algo_name
396
(recipient->pubkey_algo));
397
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
398
fprintf_plus(stderr, "Secret key available: %s\n",
399
recipient->status == GPG_ERR_NO_SECKEY
400
? "No" : "Yes");
394
401
recipient = recipient->next;
395
402
}
396
403
}
399
406
}
400
407
401
408
if(debug){
402
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
409
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
403
410
}
404
411
405
412
/* Seek back to the beginning of the GPGME plaintext data buffer */
412
419
*plaintext = NULL;
413
420
while(true){
414
421
plaintext_capacity = incbuffer(plaintext,
415
(size_t)plaintext_length,
416
plaintext_capacity);
422
(size_t)plaintext_length,
423
plaintext_capacity);
417
424
if(plaintext_capacity == 0){
418
perror_plus("incbuffer");
419
plaintext_length = -1;
420
goto decrypt_end;
425
perror_plus("incbuffer");
426
plaintext_length = -1;
427
goto decrypt_end;
421
428
}
422
429
423
430
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
436
443
}
437
444
438
445
if(debug){
439
fprintf(stderr, "Decrypted password is: ");
446
fprintf_plus(stderr, "Decrypted password is: ");
440
447
for(ssize_t i = 0; i < plaintext_length; i++){
441
448
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
442
449
}
464
471
/* GnuTLS log function callback */
465
472
static void debuggnutls(__attribute__((unused)) int level,
466
473
const char* string){
467
fprintf(stderr, "GnuTLS: %s", string);
474
fprintf_plus(stderr, "GnuTLS: %s", string);
468
475
}
469
476
470
477
static int init_gnutls_global(const char *pubkeyfilename,
472
479
int ret;
473
480
474
481
if(debug){
475
fprintf(stderr, "Initializing GnuTLS\n");
482
fprintf_plus(stderr, "Initializing GnuTLS\n");
476
483
}
477
484
478
485
ret = gnutls_global_init();
479
486
if(ret != GNUTLS_E_SUCCESS){
480
fprintf(stderr, "GnuTLS global_init: %s\n",
481
safer_gnutls_strerror(ret));
487
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
488
safer_gnutls_strerror(ret));
482
489
return -1;
483
490
}
484
491
493
500
/* OpenPGP credentials */
494
501
ret = gnutls_certificate_allocate_credentials(&mc.cred);
495
502
if(ret != GNUTLS_E_SUCCESS){
496
fprintf(stderr, "GnuTLS memory error: %s\n",
497
safer_gnutls_strerror(ret));
503
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
504
safer_gnutls_strerror(ret));
498
505
gnutls_global_deinit();
499
506
return -1;
500
507
}
501
508
502
509
if(debug){
503
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
504
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
505
seckeyfilename);
510
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
511
" secret key %s as GnuTLS credentials\n",
512
pubkeyfilename,
513
seckeyfilename);
506
514
}
507
515
508
516
ret = gnutls_certificate_set_openpgp_key_file
509
517
(mc.cred, pubkeyfilename, seckeyfilename,
510
518
GNUTLS_OPENPGP_FMT_BASE64);
511
519
if(ret != GNUTLS_E_SUCCESS){
512
fprintf(stderr,
513
"Error[%d] while reading the OpenPGP key pair ('%s',"
514
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
515
fprintf(stderr, "The GnuTLS error is: %s\n",
516
safer_gnutls_strerror(ret));
520
fprintf_plus(stderr,
521
"Error[%d] while reading the OpenPGP key pair ('%s',"
522
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
523
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
524
safer_gnutls_strerror(ret));
517
525
goto globalfail;
518
526
}
519
527
520
528
/* GnuTLS server initialization */
521
529
ret = gnutls_dh_params_init(&mc.dh_params);
522
530
if(ret != GNUTLS_E_SUCCESS){
523
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
524
" %s\n", safer_gnutls_strerror(ret));
531
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
532
" initialization: %s\n",
533
safer_gnutls_strerror(ret));
525
534
goto globalfail;
526
535
}
527
536
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
528
537
if(ret != GNUTLS_E_SUCCESS){
529
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
530
safer_gnutls_strerror(ret));
538
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
539
safer_gnutls_strerror(ret));
531
540
goto globalfail;
532
541
}
533
542
553
562
}
554
563
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
555
564
if(ret != GNUTLS_E_SUCCESS){
556
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
557
safer_gnutls_strerror(ret));
565
fprintf_plus(stderr,
566
"Error in GnuTLS session initialization: %s\n",
567
safer_gnutls_strerror(ret));
558
568
}
559
569
560
570
{
567
577
}
568
578
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
569
579
if(ret != GNUTLS_E_SUCCESS){
570
fprintf(stderr, "Syntax error at: %s\n", err);
571
fprintf(stderr, "GnuTLS error: %s\n",
572
safer_gnutls_strerror(ret));
580
fprintf_plus(stderr, "Syntax error at: %s\n", err);
581
fprintf_plus(stderr, "GnuTLS error: %s\n",
582
safer_gnutls_strerror(ret));
573
583
gnutls_deinit(*session);
574
584
return -1;
575
585
}
584
594
}
585
595
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
586
596
if(ret != GNUTLS_E_SUCCESS){
587
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
588
safer_gnutls_strerror(ret));
597
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
598
safer_gnutls_strerror(ret));
589
599
gnutls_deinit(*session);
590
600
return -1;
591
601
}
636
646
pf = PF_INET;
637
647
break;
638
648
default:
639
fprintf(stderr, "Bad address family: %d\n", af);
649
fprintf_plus(stderr, "Bad address family: %d\n", af);
640
650
errno = EINVAL;
641
651
return -1;
642
652
}
647
657
}
648
658
649
659
if(debug){
650
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
651
"\n", ip, port);
660
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
661
PRIu16 "\n", ip, port);
652
662
}
653
663
654
664
tcp_sd = socket(pf, SOCK_STREAM, 0);
680
690
}
681
691
if(ret == 0){
682
692
int e = errno;
683
fprintf(stderr, "Bad address: %s\n", ip);
693
fprintf_plus(stderr, "Bad address: %s\n", ip);
684
694
errno = e;
685
695
goto mandos_end;
686
696
}
691
701
692
702
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
693
703
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
694
-Wunreachable-code*/
704
-Wunreachable-code*/
695
705
if(if_index == AVAHI_IF_UNSPEC){
696
fprintf(stderr, "An IPv6 link-local address is incomplete"
697
" without a network interface\n");
706
fprintf_plus(stderr, "An IPv6 link-local address is"
707
" incomplete without a network interface\n");
698
708
errno = EINVAL;
699
709
goto mandos_end;
700
710
}
718
728
if(if_indextoname((unsigned int)if_index, interface) == NULL){
719
729
perror_plus("if_indextoname");
720
730
} else {
721
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
722
ip, interface, port);
731
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
732
"\n", ip, interface, port);
723
733
}
724
734
} else {
725
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
726
port);
735
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
736
ip, port);
727
737
}
728
738
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
729
739
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
739
749
perror_plus("inet_ntop");
740
750
} else {
741
751
if(strcmp(addrstr, ip) != 0){
742
fprintf(stderr, "Canonical address form: %s\n", addrstr);
752
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
743
753
}
744
754
}
745
755
}
773
783
while(true){
774
784
size_t out_size = strlen(out);
775
785
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
776
out_size - written));
786
out_size - written));
777
787
if(ret == -1){
778
788
int e = errno;
779
789
perror_plus("write");
799
809
}
800
810
801
811
if(debug){
802
fprintf(stderr, "Establishing TLS session with %s\n", ip);
812
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
803
813
}
804
814
805
815
if(quit_now){
825
835
826
836
if(ret != GNUTLS_E_SUCCESS){
827
837
if(debug){
828
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
838
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
829
839
gnutls_perror(ret);
830
840
}
831
841
errno = EPROTO;
835
845
/* Read OpenPGP packet that contains the wanted password */
836
846
837
847
if(debug){
838
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
839
ip);
848
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
849
" %s\n", ip);
840
850
}
841
851
842
852
while(true){
847
857
}
848
858
849
859
buffer_capacity = incbuffer(&buffer, buffer_length,
850
buffer_capacity);
860
buffer_capacity);
851
861
if(buffer_capacity == 0){
852
862
int e = errno;
853
863
perror_plus("incbuffer");
880
890
}
881
891
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
882
892
if(ret < 0){
883
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
893
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
894
"***\n");
884
895
gnutls_perror(ret);
885
896
errno = EPROTO;
886
897
goto mandos_end;
887
898
}
888
899
break;
889
900
default:
890
fprintf(stderr, "Unknown error while reading data from"
891
" encrypted session with Mandos server\n");
901
fprintf_plus(stderr, "Unknown error while reading data from"
902
" encrypted session with Mandos server\n");
892
903
gnutls_bye(session, GNUTLS_SHUT_RDWR);
893
904
errno = EIO;
894
905
goto mandos_end;
899
910
}
900
911
901
912
if(debug){
902
fprintf(stderr, "Closing TLS session\n");
913
fprintf_plus(stderr, "Closing TLS session\n");
903
914
}
904
915
905
916
if(quit_now){
917
928
918
929
if(buffer_length > 0){
919
930
ssize_t decrypted_buffer_size;
920
decrypted_buffer_size = pgp_packet_decrypt(buffer,
921
buffer_length,
931
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
922
932
&decrypted_buffer);
923
933
if(decrypted_buffer_size >= 0){
924
934
935
945
if(ret == 0 and ferror(stdout)){
936
946
int e = errno;
937
947
if(debug){
938
fprintf(stderr, "Error writing encrypted data: %s\n",
939
strerror(errno));
948
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
949
strerror(errno));
940
950
}
941
951
errno = e;
942
952
goto mandos_end;
999
1009
switch(event){
1000
1010
default:
1001
1011
case AVAHI_RESOLVER_FAILURE:
1002
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
1003
" of type '%s' in domain '%s': %s\n", name, type, domain,
1004
avahi_strerror(avahi_server_errno(mc.server)));
1012
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1013
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1014
domain,
1015
avahi_strerror(avahi_server_errno(mc.server)));
1005
1016
break;
1006
1017
1007
1018
case AVAHI_RESOLVER_FOUND:
1009
1020
char ip[AVAHI_ADDRESS_STR_MAX];
1010
1021
avahi_address_snprint(ip, sizeof(ip), address);
1011
1022
if(debug){
1012
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
1013
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
1014
ip, (intmax_t)interface, port);
1023
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1024
PRIdMAX ") on port %" PRIu16 "\n", name,
1025
host_name, ip, (intmax_t)interface, port);
1015
1026
}
1016
1027
int ret = start_mandos_communication(ip, port, interface,
1017
1028
avahi_proto_to_af(proto));
1049
1060
default:
1050
1061
case AVAHI_BROWSER_FAILURE:
1051
1062
1052
fprintf(stderr, "(Avahi browser) %s\n",
1053
avahi_strerror(avahi_server_errno(mc.server)));
1063
fprintf_plus(stderr, "(Avahi browser) %s\n",
1064
avahi_strerror(avahi_server_errno(mc.server)));
1054
1065
avahi_simple_poll_quit(mc.simple_poll);
1055
1066
return;
1056
1067
1063
1074
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1064
1075
name, type, domain, protocol, 0,
1065
1076
resolve_callback, NULL) == NULL)
1066
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
1067
name, avahi_strerror(avahi_server_errno(mc.server)));
1077
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1078
" %s\n", name,
1079
avahi_strerror(avahi_server_errno(mc.server)));
1068
1080
break;
1069
1081
1070
1082
case AVAHI_BROWSER_REMOVE:
1073
1085
case AVAHI_BROWSER_ALL_FOR_NOW:
1074
1086
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1075
1087
if(debug){
1076
fprintf(stderr, "No Mandos server found, still searching...\n");
1088
fprintf_plus(stderr, "No Mandos server found, still"
1089
" searching...\n");
1077
1090
}
1078
1091
break;
1079
1092
}
1118
1131
/* Reject the loopback device */
1119
1132
if(ifr->ifr_flags & IFF_LOOPBACK){
1120
1133
if(debug){
1121
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1122
ifname);
1134
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1135
ifname);
1123
1136
}
1124
1137
return false;
1125
1138
}
1126
1139
/* Accept point-to-point devices only if connect_to is specified */
1127
1140
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1128
1141
if(debug){
1129
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1130
ifname);
1142
fprintf_plus(stderr, "Accepting point-to-point interface"
1143
" \"%s\"\n", ifname);
1131
1144
}
1132
1145
return true;
1133
1146
}
1134
1147
/* Otherwise, reject non-broadcast-capable devices */
1135
1148
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1136
1149
if(debug){
1137
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1138
ifname);
1150
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1151
" \"%s\"\n", ifname);
1139
1152
}
1140
1153
return false;
1141
1154
}
1142
1155
/* Reject non-ARP interfaces (including dummy interfaces) */
1143
1156
if(ifr->ifr_flags & IFF_NOARP){
1144
1157
if(debug){
1145
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n", ifname);
1158
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1159
ifname);
1146
1160
}
1147
1161
return false;
1148
1162
}
1149
1163
1150
1164
/* Accept this device */
1151
1165
if(debug){
1152
fprintf(stderr, "Interface \"%s\" is good\n", ifname);
1166
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1153
1167
}
1154
1168
return true;
1155
1169
}
1160
1174
* (This function is passed to scandir(3) as a filter function.)
1161
1175
*/
1162
1176
int good_interface(const struct dirent *if_entry){
1163
int ret;
1164
1177
if(if_entry->d_name[0] == '.'){
1165
1178
return 0;
1166
1179
}
1180
1167
1181
struct ifreq ifr;
1168
1169
1182
if(not get_flags(if_entry->d_name, &ifr)){
1183
if(debug){
1184
fprintf_plus(stderr, "Failed to get flags for interface "
1185
"\"%s\"\n", if_entry->d_name);
1186
}
1170
1187
return 0;
1171
1188
}
1172
1189
1182
1199
* (This function is passed to scandir(3) as a filter function.)
1183
1200
*/
1184
1201
int up_interface(const struct dirent *if_entry){
1185
ssize_t ssret;
1186
char *flagname = NULL;
1187
1202
if(if_entry->d_name[0] == '.'){
1188
1203
return 0;
1189
1204
}
1190
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1191
if_entry->d_name);
1192
if(ret < 0){
1193
perror_plus("asprintf");
1194
return 0;
1195
}
1196
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1197
if(flags_fd == -1){
1198
perror_plus("open");
1199
free(flagname);
1200
return 0;
1201
}
1202
free(flagname);
1203
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1204
/* read line from flags_fd */
1205
ssize_t to_read = 2+(sizeof(ifreq_flags)*2)+1; /* "0x1003\n" */
1206
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1207
flagstring[(size_t)to_read] = '\0';
1208
if(flagstring == NULL){
1209
perror_plus("malloc");
1210
close(flags_fd);
1211
return 0;
1212
}
1213
while(to_read > 0){
1214
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1215
(size_t)to_read));
1216
if(ssret == -1){
1217
perror_plus("read");
1218
free(flagstring);
1219
close(flags_fd);
1220
return 0;
1221
}
1222
to_read -= ssret;
1223
if(ssret == 0){
1224
break;
1225
}
1226
}
1227
close(flags_fd);
1228
intmax_t tmpmax;
1229
char *tmp;
1230
errno = 0;
1231
tmpmax = strtoimax(flagstring, &tmp, 0);
1232
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1233
and not (isspace(*tmp)))
1234
or tmpmax != (ifreq_flags)tmpmax){
1235
if(debug){
1236
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1237
flagstring, if_entry->d_name);
1238
}
1239
free(flagstring);
1240
return 0;
1241
}
1242
free(flagstring);
1243
ifreq_flags flags = (ifreq_flags)tmpmax;
1244
/* Reject the loopback device */
1245
if(flags & IFF_LOOPBACK){
1246
if(debug){
1247
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1248
if_entry->d_name);
1249
}
1250
return 0;
1251
}
1252
1205
1206
struct ifreq ifr;
1207
if(not get_flags(if_entry->d_name, &ifr)){
1208
if(debug){
1209
fprintf_plus(stderr, "Failed to get flags for interface "
1210
"\"%s\"\n", if_entry->d_name);
1211
}
1212
return 0;
1213
}
1214
1253
1215
/* Reject down interfaces */
1254
if(not (flags & IFF_UP)){
1255
return 0;
1256
}
1257
1258
/* Accept point-to-point devices only if connect_to is specified */
1259
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1260
if(debug){
1261
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1262
if_entry->d_name);
1263
}
1264
return 1;
1265
}
1266
/* Otherwise, reject non-broadcast-capable devices */
1267
if(not (flags & IFF_BROADCAST)){
1268
if(debug){
1269
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1270
if_entry->d_name);
1271
}
1272
return 0;
1273
}
1274
/* Reject non-ARP interfaces (including dummy interfaces) */
1275
if(flags & IFF_NOARP){
1276
if(debug){
1277
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n",
1278
if_entry->d_name);
1279
}
1280
return 0;
1281
}
1282
/* Accept this device */
1283
if(debug){
1284
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1285
if_entry->d_name);
1216
if(not (ifr.ifr_flags & IFF_UP)){
1217
if(debug){
1218
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1219
if_entry->d_name);
1220
}
1221
return 0;
1222
}
1223
1224
/* Reject non-running interfaces */
1225
if(not (ifr.ifr_flags & IFF_RUNNING)){
1226
if(debug){
1227
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1228
if_entry->d_name);
1229
}
1230
return 0;
1231
}
1232
1233
if(not good_flags(if_entry->d_name, &ifr)){
1234
return 0;
1286
1235
}
1287
1236
return 1;
1288
1237
}
1301
1250
/* Is this directory entry a runnable program? */
1302
1251
int runnable_hook(const struct dirent *direntry){
1303
1252
int ret;
1253
size_t sret;
1304
1254
struct stat st;
1305
1255
1306
1256
if((direntry->d_name)[0] == '\0'){
1308
1258
return 0;
1309
1259
}
1310
1260
1311
/* Save pointer to last character */
1312
char *end = strchr(direntry->d_name, '\0')-1;
1313
1314
if(*end == '~'){
1315
/* Backup name~ */
1316
return 0;
1317
}
1318
1319
if(((direntry->d_name)[0] == '#')
1320
and (*end == '#')){
1321
/* Temporary #name# */
1322
return 0;
1323
}
1324
1325
/* XXX more rules here */
1326
1327
ret = stat(direntry->d_name, &st);
1261
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1262
"abcdefghijklmnopqrstuvwxyz"
1263
"0123456789"
1264
"_-");
1265
if((direntry->d_name)[sret] != '\0'){
1266
/* Contains non-allowed characters */
1267
if(debug){
1268
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1269
direntry->d_name);
1270
}
1271
return 0;
1272
}
1273
1274
char *fullname = NULL;
1275
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1276
if(ret < 0){
1277
perror_plus("asprintf");
1278
return 0;
1279
}
1280
1281
ret = stat(fullname, &st);
1328
1282
if(ret == -1){
1329
1283
if(debug){
1330
perror_plus("Could not stat plugin");
1284
perror_plus("Could not stat hook");
1331
1285
}
1332
1286
return 0;
1333
1287
}
1334
if(not (st.st_mode & S_ISREG)){
1288
if(not (S_ISREG(st.st_mode))){
1335
1289
/* Not a regular file */
1290
if(debug){
1291
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1292
direntry->d_name);
1293
}
1336
1294
return 0;
1337
1295
}
1338
1296
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1339
1297
/* Not executable */
1298
if(debug){
1299
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1300
direntry->d_name);
1301
}
1340
1302
return 0;
1341
1303
}
1342
1304
return 1;
1351
1313
while(true){
1352
1314
if(mc.current_server == NULL){
1353
1315
if (debug){
1354
fprintf(stderr,
1355
"Wait until first server is found. No timeout!\n");
1316
fprintf_plus(stderr, "Wait until first server is found."
1317
" No timeout!\n");
1356
1318
}
1357
1319
ret = avahi_simple_poll_iterate(s, -1);
1358
1320
} else {
1359
1321
if (debug){
1360
fprintf(stderr, "Check current_server if we should run it,"
1361
" or wait\n");
1322
fprintf_plus(stderr, "Check current_server if we should run"
1323
" it, or wait\n");
1362
1324
}
1363
1325
/* the current time */
1364
1326
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1380
1342
- ((intmax_t)waited_time.tv_nsec / 1000000));
1381
1343
1382
1344
if (debug){
1383
fprintf(stderr, "Blocking for %" PRIdMAX " ms\n", block_time);
1345
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1346
block_time);
1384
1347
}
1385
1348
1386
1349
if(block_time <= 0){
1406
1369
ret = avahi_simple_poll_iterate(s, (int)block_time);
1407
1370
}
1408
1371
if(ret != 0){
1409
if (ret > 0 or errno != EINTR) {
1372
if (ret > 0 or errno != EINTR){
1410
1373
return (ret != 1) ? ret : 0;
1411
1374
}
1412
1375
}
1413
1376
}
1414
1377
}
1415
1378
1379
bool run_network_hooks(const char *mode, const char *interface,
1380
const float delay){
1381
struct dirent **direntries;
1382
struct dirent *direntry;
1383
int ret;
1384
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1385
alphasort);
1386
if(numhooks == -1){
1387
perror_plus("scandir");
1388
} else {
1389
int devnull = open("/dev/null", O_RDONLY);
1390
for(int i = 0; i < numhooks; i++){
1391
direntry = direntries[0];
1392
char *fullname = NULL;
1393
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1394
if(ret < 0){
1395
perror_plus("asprintf");
1396
continue;
1397
}
1398
pid_t hook_pid = fork();
1399
if(hook_pid == 0){
1400
/* Child */
1401
dup2(devnull, STDIN_FILENO);
1402
close(devnull);
1403
dup2(STDERR_FILENO, STDOUT_FILENO);
1404
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1405
if(ret == -1){
1406
perror_plus("setenv");
1407
return false;
1408
}
1409
ret = setenv("DEVICE", interface, 1);
1410
if(ret == -1){
1411
perror_plus("setenv");
1412
return false;
1413
}
1414
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1415
if(ret == -1){
1416
perror_plus("setenv");
1417
return false;
1418
}
1419
ret = setenv("MODE", mode, 1);
1420
if(ret == -1){
1421
perror_plus("setenv");
1422
return false;
1423
}
1424
char *delaystring;
1425
ret = asprintf(&delaystring, "%f", delay);
1426
if(ret == -1){
1427
perror_plus("asprintf");
1428
return false;
1429
}
1430
ret = setenv("DELAY", delaystring, 1);
1431
if(ret == -1){
1432
free(delaystring);
1433
perror_plus("setenv");
1434
return false;
1435
}
1436
free(delaystring);
1437
ret = execl(fullname, direntry->d_name, mode, NULL);
1438
perror_plus("execl");
1439
} else {
1440
int status;
1441
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1442
perror_plus("waitpid");
1443
free(fullname);
1444
continue;
1445
}
1446
if(WIFEXITED(status)){
1447
if(WEXITSTATUS(status) != 0){
1448
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1449
" with status %d\n", direntry->d_name,
1450
WEXITSTATUS(status));
1451
free(fullname);
1452
continue;
1453
}
1454
} else if(WIFSIGNALED(status)){
1455
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1456
" signal %d\n", direntry->d_name,
1457
WTERMSIG(status));
1458
free(fullname);
1459
continue;
1460
} else {
1461
fprintf_plus(stderr, "Warning: network hook \"%s\""
1462
" crashed\n", direntry->d_name);
1463
free(fullname);
1464
continue;
1465
}
1466
}
1467
free(fullname);
1468
if(quit_now){
1469
break;
1470
}
1471
}
1472
close(devnull);
1473
}
1474
return true;
1475
}
1476
1416
1477
int main(int argc, char *argv[]){
1417
1478
AvahiSServiceBrowser *sb = NULL;
1418
1479
int error;
1500
1561
.arg = "SECONDS",
1501
1562
.doc = "Retry interval used when denied by the mandos server",
1502
1563
.group = 2 },
1564
{ .name = "network-hook-dir", .key = 133,
1565
.arg = "DIR",
1566
.doc = "Directory where network hooks are located",
1567
.group = 2 },
1503
1568
/*
1504
1569
* These reproduce what we would get without ARGP_NO_HELP
1505
1570
*/
1558
1623
argp_error(state, "Bad retry interval");
1559
1624
}
1560
1625
break;
1626
case 133: /* --network-hook-dir */
1627
hookdir = arg;
1628
break;
1561
1629
/*
1562
1630
* These reproduce what we would get without ARGP_NO_HELP
1563
1631
*/
1569
1637
argp_state_help(state, state->out_stream,
1570
1638
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1571
1639
case 'V': /* --version */
1572
fprintf(state->out_stream, "%s\n", argp_program_version);
1640
fprintf_plus(state->out_stream,
1641
"Mandos plugin mandos-client: ");
1642
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1573
1643
exit(argp_err_exit_status);
1574
1644
break;
1575
1645
default:
1620
1690
if(ret == -1){
1621
1691
perror_plus("fstat");
1622
1692
} else {
1623
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1693
if(S_ISREG(st.st_mode)
1694
and st.st_uid == 0 and st.st_gid == 0){
1624
1695
ret = fchown(seckey_fd, uid, gid);
1625
1696
if(ret == -1){
1626
1697
perror_plus("fchown");
1640
1711
if(ret == -1){
1641
1712
perror_plus("fstat");
1642
1713
} else {
1643
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1714
if(S_ISREG(st.st_mode)
1715
and st.st_uid == 0 and st.st_gid == 0){
1644
1716
ret = fchown(pubkey_fd, uid, gid);
1645
1717
if(ret == -1){
1646
1718
perror_plus("fchown");
1659
1731
}
1660
1732
}
1661
1733
1662
/* Find network hooks and run them */
1734
/* Run network hooks */
1663
1735
{
1664
struct dirent **direntries;
1665
struct dirent *direntry;
1666
int numhooks = scandir(HOOKDIR, &direntries, runnable_hook,
1667
alphasort);
1668
int devnull = open("/dev/null", O_RDONLY);
1669
for(int i = 0; i < numhooks; i++){
1670
direntry = direntries[0];
1671
char *fullname = NULL;
1672
ret = asprintf(&fullname, "%s/%s", tempdir,
1673
direntry->d_name);
1674
if(ret < 0){
1675
perror_plus("asprintf");
1676
continue;
1677
}
1678
pid_t hook_pid = fork();
1679
if(hook_pid == 0){
1680
/* Child */
1681
dup2(devnull, STDIN_FILENO);
1682
close(devnull);
1683
dup2(STDERR_FILENO, STDOUT_FILENO);
1684
setenv("DEVICE", interface, 1);
1685
setenv("VERBOSE", debug ? "1" : "0", 1);
1686
setenv("MODE", "start", 1);
1687
/* setenv( XXX more here */
1688
ret = execl(fullname, direntry->d_name, "start");
1689
perror_plus("execl");
1690
}
1691
free(fullname);
1692
if(quit_now){
1693
goto end;
1694
}
1695
}
1696
close(devnull);
1736
/* Re-raise priviliges */
1737
errno = 0;
1738
ret = seteuid(0);
1739
if(ret == -1){
1740
perror_plus("seteuid");
1741
}
1742
if(not run_network_hooks("start", interface, delay)){
1743
goto end;
1744
}
1745
/* Lower privileges */
1746
errno = 0;
1747
ret = seteuid(uid);
1748
if(ret == -1){
1749
perror_plus("seteuid");
1750
}
1697
1751
}
1698
1752
1699
1753
if(not debug){
1702
1756
1703
1757
if(interface[0] == '\0'){
1704
1758
struct dirent **direntries;
1705
ret = scandir(sys_class_net, &direntries, good_interface,
1759
/* First look for interfaces that are up */
1760
ret = scandir(sys_class_net, &direntries, up_interface,
1706
1761
alphasort);
1762
if(ret == 0){
1763
/* No up interfaces, look for any good interfaces */
1764
free(direntries);
1765
ret = scandir(sys_class_net, &direntries, good_interface,
1766
alphasort);
1767
}
1707
1768
if(ret >= 1){
1708
/* Pick the first good interface */
1769
/* Pick the first interface returned */
1709
1770
interface = strdup(direntries[0]->d_name);
1710
1771
if(debug){
1711
fprintf(stderr, "Using interface \"%s\"\n", interface);
1772
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1712
1773
}
1713
1774
if(interface == NULL){
1714
1775
perror_plus("malloc");
1719
1780
free(direntries);
1720
1781
} else {
1721
1782
free(direntries);
1722
fprintf(stderr, "Could not find a network interface\n");
1783
fprintf_plus(stderr, "Could not find a network interface\n");
1723
1784
exitcode = EXIT_FAILURE;
1724
1785
goto end;
1725
1786
}
1731
1792
srand((unsigned int) time(NULL));
1732
1793
mc.simple_poll = avahi_simple_poll_new();
1733
1794
if(mc.simple_poll == NULL){
1734
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1795
fprintf_plus(stderr,
1796
"Avahi: Failed to create simple poll object.\n");
1735
1797
exitcode = EX_UNAVAILABLE;
1736
1798
goto end;
1737
1799
}
1803
1865
if(strcmp(interface, "none") != 0){
1804
1866
if_index = (AvahiIfIndex) if_nametoindex(interface);
1805
1867
if(if_index == 0){
1806
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1868
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1807
1869
exitcode = EX_UNAVAILABLE;
1808
1870
goto end;
1809
1871
}
1929
1991
#endif /* __linux__ */
1930
1992
/* Lower privileges */
1931
1993
errno = 0;
1932
if(take_down_interface){
1933
/* Lower privileges */
1934
ret = seteuid(uid);
1935
if(ret == -1){
1936
perror_plus("seteuid");
1937
}
1938
} else {
1939
/* Lower privileges permanently */
1940
ret = setuid(uid);
1941
if(ret == -1){
1942
perror_plus("setuid");
1943
}
1994
/* Lower privileges */
1995
ret = seteuid(uid);
1996
if(ret == -1){
1997
perror_plus("seteuid");
1944
1998
}
1945
1999
}
1946
2000
1950
2004
1951
2005
ret = init_gnutls_global(pubkey, seckey);
1952
2006
if(ret == -1){
1953
fprintf(stderr, "init_gnutls_global failed\n");
2007
fprintf_plus(stderr, "init_gnutls_global failed\n");
1954
2008
exitcode = EX_UNAVAILABLE;
1955
2009
goto end;
1956
2010
} else {
1972
2026
}
1973
2027
1974
2028
if(not init_gpgme(pubkey, seckey, tempdir)){
1975
fprintf(stderr, "init_gpgme failed\n");
2029
fprintf_plus(stderr, "init_gpgme failed\n");
1976
2030
exitcode = EX_UNAVAILABLE;
1977
2031
goto end;
1978
2032
} else {
1988
2042
/* (Mainly meant for debugging) */
1989
2043
char *address = strrchr(connect_to, ':');
1990
2044
if(address == NULL){
1991
fprintf(stderr, "No colon in address\n");
2045
fprintf_plus(stderr, "No colon in address\n");
1992
2046
exitcode = EX_USAGE;
1993
2047
goto end;
1994
2048
}
2002
2056
tmpmax = strtoimax(address+1, &tmp, 10);
2003
2057
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2004
2058
or tmpmax != (uint16_t)tmpmax){
2005
fprintf(stderr, "Bad port number\n");
2059
fprintf_plus(stderr, "Bad port number\n");
2006
2060
exitcode = EX_USAGE;
2007
2061
goto end;
2008
2062
}
2038
2092
break;
2039
2093
}
2040
2094
if(debug){
2041
fprintf(stderr, "Retrying in %d seconds\n",
2042
(int)retry_interval);
2095
fprintf_plus(stderr, "Retrying in %d seconds\n",
2096
(int)retry_interval);
2043
2097
}
2044
2098
sleep((int)retry_interval);
2045
2099
}
2075
2129
2076
2130
/* Check if creating the Avahi server object succeeded */
2077
2131
if(mc.server == NULL){
2078
fprintf(stderr, "Failed to create Avahi server: %s\n",
2079
avahi_strerror(error));
2132
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2133
avahi_strerror(error));
2080
2134
exitcode = EX_UNAVAILABLE;
2081
2135
goto end;
2082
2136
}
2090
2144
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2091
2145
NULL, 0, browse_callback, NULL);
2092
2146
if(sb == NULL){
2093
fprintf(stderr, "Failed to create service browser: %s\n",
2094
avahi_strerror(avahi_server_errno(mc.server)));
2147
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2148
avahi_strerror(avahi_server_errno(mc.server)));
2095
2149
exitcode = EX_UNAVAILABLE;
2096
2150
goto end;
2097
2151
}
2103
2157
/* Run the main loop */
2104
2158
2105
2159
if(debug){
2106
fprintf(stderr, "Starting Avahi loop search\n");
2160
fprintf_plus(stderr, "Starting Avahi loop search\n");
2107
2161
}
2108
2162
2109
2163
ret = avahi_loop_with_timeout(mc.simple_poll,
2110
2164
(int)(retry_interval * 1000));
2111
2165
if(debug){
2112
fprintf(stderr, "avahi_loop_with_timeout exited %s\n",
2113
(ret == 0) ? "successfully" : "with error");
2166
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2167
(ret == 0) ? "successfully" : "with error");
2114
2168
}
2115
2169
2116
2170
end:
2117
2171
2118
2172
if(debug){
2119
fprintf(stderr, "%s exiting\n", argv[0]);
2173
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2120
2174
}
2121
2175
2122
2176
/* Cleanup things */
2150
2204
}
2151
2205
}
2152
2206
2153
/* XXX run network hooks "stop" here */
2154
2155
/* Take down the network interface */
2156
if(take_down_interface){
2157
/* Re-raise priviliges */
2207
/* Re-raise priviliges */
2208
{
2158
2209
errno = 0;
2159
2210
ret = seteuid(0);
2160
2211
if(ret == -1){
2161
2212
perror_plus("seteuid");
2162
2213
}
2163
if(geteuid() == 0){
2214
/* Run network hooks */
2215
if(not run_network_hooks("stop", interface, delay)){
2216
goto end;
2217
}
2218
2219
/* Take down the network interface */
2220
if(take_down_interface and geteuid() == 0){
2164
2221
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2165
2222
if(ret == -1){
2166
2223
perror_plus("ioctl SIOCGIFFLAGS");
2167
} else if(network.ifr_flags & IFF_UP) {
2224
} else if(network.ifr_flags & IFF_UP){
2168
2225
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2169
2226
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2170
2227
if(ret == -1){
2175
2232
if(ret == -1){
2176
2233
perror_plus("close");
2177
2234
}
2178
/* Lower privileges permanently */
2179
errno = 0;
2180
ret = setuid(uid);
2181
if(ret == -1){
2182
perror_plus("setuid");
2183
}
2184
2235
}
2185
2236
}
2237
/* Lower privileges permanently */
2238
errno = 0;
2239
ret = setuid(uid);
2240
if(ret == -1){
2241
perror_plus("setuid");
2242
}
2186
2243
2187
2244
/* Removes the GPGME temp directory and all files inside */
2188
2245
if(tempdir_created){
2202
2259
}
2203
2260
ret = remove(fullname);
2204
2261
if(ret == -1){
2205
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
2206
strerror(errno));
2262
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2263
strerror(errno));
2207
2264
}
2208
2265
free(fullname);
2209
2266
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0