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- Committer: Teddy Hogeborn
- Date: 2012-05-26 22:21:17 UTC
- mto: This revision was merged to the branch mainline in revision 591.
- Revision ID: teddy@recompile.se-20120526222117-2n4oeb3hqyq4rjdh
* mandos: Implement "--socket" option.
(IPv6_TCPServer.__init__): Take new "socketfd" parameter; use it.
(MandosServer.__init__): Take new "socketfd" parameter. Pass it on
to IPv6_TCPServer constructor.
(main): Take new "--socket" option. Also take "socket" parameter in
"mandos.conf" configuration file. If set, pass the value to
MandosServer constructor.
* mandos-options.xml (socket): Document new "socket" option.
* mandos-conf.xml (OPTIONS): - '' -
* mandos.xml (SYNOPSIS, OPTIONS): Document new "--socket" option.
(IPv6_TCPServer.__init__): Take new "socketfd" parameter; use it.
(MandosServer.__init__): Take new "socketfd" parameter. Pass it on
to IPv6_TCPServer constructor.
(main): Take new "--socket" option. Also take "socket" parameter in
"mandos.conf" configuration file. If set, pass the value to
MandosServer constructor.
* mandos-options.xml (socket): Document new "socket" option.
* mandos-conf.xml (OPTIONS): - '' -
* mandos.xml (SYNOPSIS, OPTIONS): Document new "--socket" option.
- files added:
- network-hooks.d
- files modified:
- .bzrignore
added
removed
plugins.d/mandos-client.c
9
9
* "browse_callback", and parts of "main".
10
10
*
11
11
* Everything else is
12
* Copyright © 2008-2011 Teddy Hogeborn
13
* Copyright © 2008-2011 Björn Påhlsson
12
* Copyright © 2008-2012 Teddy Hogeborn
13
* Copyright © 2008-2012 Björn Påhlsson
14
14
*
15
15
* This program is free software: you can redistribute it and/or
16
16
* modify it under the terms of the GNU General Public License as
41
41
42
42
#include <stdio.h> /* fprintf(), stderr, fwrite(),
43
43
stdout, ferror(), remove() */
44
#include <stdint.h> /* uint16_t, uint32_t */
44
#include <stdint.h> /* uint16_t, uint32_t, intptr_t */
45
45
#include <stddef.h> /* NULL, size_t, ssize_t */
46
46
#include <stdlib.h> /* free(), EXIT_SUCCESS, srand(),
47
47
strtof(), abort() */
73
73
*/
74
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
75
getuid(), getgid(), seteuid(),
76
setgid(), pause() */
76
setgid(), pause(), _exit() */
77
77
#include <arpa/inet.h> /* inet_pton(), htons, inet_ntop() */
78
78
#include <iso646.h> /* not, or, and */
79
79
#include <argp.h> /* struct argp_option, error_t, struct
87
87
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
88
88
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
89
89
WEXITSTATUS(), WTERMSIG() */
90
#include <grp.h> /* setgroups() */
90
91
91
92
#ifdef __linux__
92
93
#include <sys/klog.h> /* klogctl() */
169
170
170
171
/* Function to use when printing errors */
171
172
void perror_plus(const char *print_text){
173
int e = errno;
172
174
fprintf(stderr, "Mandos plugin %s: ",
173
175
program_invocation_short_name);
176
errno = e;
174
177
perror(print_text);
175
178
}
176
179
180
__attribute__((format (gnu_printf, 2, 3)))
181
int fprintf_plus(FILE *stream, const char *format, ...){
182
va_list ap;
183
va_start (ap, format);
184
185
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
186
program_invocation_short_name));
187
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
188
}
189
177
190
/*
178
191
* Make additional room in "buffer" for at least BUFFER_SIZE more
179
192
* bytes. "buffer_capacity" is how much is currently allocated,
192
205
}
193
206
194
207
/* Add server to set of servers to retry periodically */
195
int add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
196
int af){
208
bool add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
209
int af){
197
210
int ret;
198
211
server *new_server = malloc(sizeof(server));
199
212
if(new_server == NULL){
200
213
perror_plus("malloc");
201
return -1;
214
return false;
202
215
}
203
216
*new_server = (server){ .ip = strdup(ip),
204
217
.port = port,
206
219
.af = af };
207
220
if(new_server->ip == NULL){
208
221
perror_plus("strdup");
209
return -1;
222
return false;
210
223
}
211
224
/* Special case of first server */
212
225
if (mc.current_server == NULL){
223
236
ret = clock_gettime(CLOCK_MONOTONIC, &mc.current_server->last_seen);
224
237
if(ret == -1){
225
238
perror_plus("clock_gettime");
226
return -1;
239
return false;
227
240
}
228
return 0;
241
return true;
229
242
}
230
243
231
244
/*
253
266
254
267
rc = gpgme_data_new_from_fd(&pgp_data, fd);
255
268
if(rc != GPG_ERR_NO_ERROR){
256
fprintf(stderr, "Mandos plugin mandos-client: "
257
"bad gpgme_data_new_from_fd: %s: %s\n",
258
gpgme_strsource(rc), gpgme_strerror(rc));
269
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
270
gpgme_strsource(rc), gpgme_strerror(rc));
259
271
return false;
260
272
}
261
273
262
274
rc = gpgme_op_import(mc.ctx, pgp_data);
263
275
if(rc != GPG_ERR_NO_ERROR){
264
fprintf(stderr, "Mandos plugin mandos-client: "
265
"bad gpgme_op_import: %s: %s\n",
266
gpgme_strsource(rc), gpgme_strerror(rc));
276
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
277
gpgme_strsource(rc), gpgme_strerror(rc));
267
278
return false;
268
279
}
269
280
276
287
}
277
288
278
289
if(debug){
279
fprintf(stderr, "Mandos plugin mandos-client: "
280
"Initializing GPGME\n");
290
fprintf_plus(stderr, "Initializing GPGME\n");
281
291
}
282
292
283
293
/* Init GPGME */
284
294
gpgme_check_version(NULL);
285
295
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
286
296
if(rc != GPG_ERR_NO_ERROR){
287
fprintf(stderr, "Mandos plugin mandos-client: "
288
"bad gpgme_engine_check_version: %s: %s\n",
289
gpgme_strsource(rc), gpgme_strerror(rc));
297
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
298
gpgme_strsource(rc), gpgme_strerror(rc));
290
299
return false;
291
300
}
292
301
293
302
/* Set GPGME home directory for the OpenPGP engine only */
294
303
rc = gpgme_get_engine_info(&engine_info);
295
304
if(rc != GPG_ERR_NO_ERROR){
296
fprintf(stderr, "Mandos plugin mandos-client: "
297
"bad gpgme_get_engine_info: %s: %s\n",
298
gpgme_strsource(rc), gpgme_strerror(rc));
305
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
306
gpgme_strsource(rc), gpgme_strerror(rc));
299
307
return false;
300
308
}
301
309
while(engine_info != NULL){
307
315
engine_info = engine_info->next;
308
316
}
309
317
if(engine_info == NULL){
310
fprintf(stderr, "Mandos plugin mandos-client: "
311
"Could not set GPGME home dir to %s\n", tempdir);
318
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
319
tempdir);
312
320
return false;
313
321
}
314
322
315
323
/* Create new GPGME "context" */
316
324
rc = gpgme_new(&(mc.ctx));
317
325
if(rc != GPG_ERR_NO_ERROR){
318
fprintf(stderr, "Mandos plugin mandos-client: "
319
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
320
gpgme_strerror(rc));
326
fprintf_plus(stderr, "Mandos plugin mandos-client: "
327
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
328
gpgme_strerror(rc));
321
329
return false;
322
330
}
323
331
342
350
ssize_t plaintext_length = 0;
343
351
344
352
if(debug){
345
fprintf(stderr, "Mandos plugin mandos-client: "
346
"Trying to decrypt OpenPGP data\n");
353
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
347
354
}
348
355
349
356
/* Create new GPGME data buffer from memory cryptotext */
350
357
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
351
358
0);
352
359
if(rc != GPG_ERR_NO_ERROR){
353
fprintf(stderr, "Mandos plugin mandos-client: "
354
"bad gpgme_data_new_from_mem: %s: %s\n",
355
gpgme_strsource(rc), gpgme_strerror(rc));
360
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
361
gpgme_strsource(rc), gpgme_strerror(rc));
356
362
return -1;
357
363
}
358
364
359
365
/* Create new empty GPGME data buffer for the plaintext */
360
366
rc = gpgme_data_new(&dh_plain);
361
367
if(rc != GPG_ERR_NO_ERROR){
362
fprintf(stderr, "Mandos plugin mandos-client: "
363
"bad gpgme_data_new: %s: %s\n",
364
gpgme_strsource(rc), gpgme_strerror(rc));
368
fprintf_plus(stderr, "Mandos plugin mandos-client: "
369
"bad gpgme_data_new: %s: %s\n",
370
gpgme_strsource(rc), gpgme_strerror(rc));
365
371
gpgme_data_release(dh_crypto);
366
372
return -1;
367
373
}
370
376
data buffer */
371
377
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
372
378
if(rc != GPG_ERR_NO_ERROR){
373
fprintf(stderr, "Mandos plugin mandos-client: "
374
"bad gpgme_op_decrypt: %s: %s\n",
375
gpgme_strsource(rc), gpgme_strerror(rc));
379
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
380
gpgme_strsource(rc), gpgme_strerror(rc));
376
381
plaintext_length = -1;
377
382
if(debug){
378
383
gpgme_decrypt_result_t result;
379
384
result = gpgme_op_decrypt_result(mc.ctx);
380
385
if(result == NULL){
381
fprintf(stderr, "Mandos plugin mandos-client: "
382
"gpgme_op_decrypt_result failed\n");
386
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
383
387
} else {
384
fprintf(stderr, "Mandos plugin mandos-client: "
385
"Unsupported algorithm: %s\n",
386
result->unsupported_algorithm);
387
fprintf(stderr, "Mandos plugin mandos-client: "
388
"Wrong key usage: %u\n",
389
result->wrong_key_usage);
388
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
389
result->unsupported_algorithm);
390
fprintf_plus(stderr, "Wrong key usage: %u\n",
391
result->wrong_key_usage);
390
392
if(result->file_name != NULL){
391
fprintf(stderr, "Mandos plugin mandos-client: "
392
"File name: %s\n", result->file_name);
393
fprintf_plus(stderr, "File name: %s\n", result->file_name);
393
394
}
394
395
gpgme_recipient_t recipient;
395
396
recipient = result->recipients;
396
397
while(recipient != NULL){
397
fprintf(stderr, "Mandos plugin mandos-client: "
398
"Public key algorithm: %s\n",
399
gpgme_pubkey_algo_name(recipient->pubkey_algo));
400
fprintf(stderr, "Mandos plugin mandos-client: "
401
"Key ID: %s\n", recipient->keyid);
402
fprintf(stderr, "Mandos plugin mandos-client: "
403
"Secret key available: %s\n",
404
recipient->status == GPG_ERR_NO_SECKEY
405
? "No" : "Yes");
398
fprintf_plus(stderr, "Public key algorithm: %s\n",
399
gpgme_pubkey_algo_name
400
(recipient->pubkey_algo));
401
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
402
fprintf_plus(stderr, "Secret key available: %s\n",
403
recipient->status == GPG_ERR_NO_SECKEY
404
? "No" : "Yes");
406
405
recipient = recipient->next;
407
406
}
408
407
}
411
410
}
412
411
413
412
if(debug){
414
fprintf(stderr, "Mandos plugin mandos-client: "
415
"Decryption of OpenPGP data succeeded\n");
413
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
416
414
}
417
415
418
416
/* Seek back to the beginning of the GPGME plaintext data buffer */
449
447
}
450
448
451
449
if(debug){
452
fprintf(stderr, "Mandos plugin mandos-client: "
453
"Decrypted password is: ");
450
fprintf_plus(stderr, "Decrypted password is: ");
454
451
for(ssize_t i = 0; i < plaintext_length; i++){
455
452
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
456
453
}
478
475
/* GnuTLS log function callback */
479
476
static void debuggnutls(__attribute__((unused)) int level,
480
477
const char* string){
481
fprintf(stderr, "Mandos plugin mandos-client: GnuTLS: %s", string);
478
fprintf_plus(stderr, "GnuTLS: %s", string);
482
479
}
483
480
484
481
static int init_gnutls_global(const char *pubkeyfilename,
486
483
int ret;
487
484
488
485
if(debug){
489
fprintf(stderr, "Mandos plugin mandos-client: "
490
"Initializing GnuTLS\n");
486
fprintf_plus(stderr, "Initializing GnuTLS\n");
491
487
}
492
488
493
489
ret = gnutls_global_init();
494
490
if(ret != GNUTLS_E_SUCCESS){
495
fprintf(stderr, "Mandos plugin mandos-client: "
496
"GnuTLS global_init: %s\n", safer_gnutls_strerror(ret));
491
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
492
safer_gnutls_strerror(ret));
497
493
return -1;
498
494
}
499
495
508
504
/* OpenPGP credentials */
509
505
ret = gnutls_certificate_allocate_credentials(&mc.cred);
510
506
if(ret != GNUTLS_E_SUCCESS){
511
fprintf(stderr, "Mandos plugin mandos-client: "
512
"GnuTLS memory error: %s\n", safer_gnutls_strerror(ret));
507
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
508
safer_gnutls_strerror(ret));
513
509
gnutls_global_deinit();
514
510
return -1;
515
511
}
516
512
517
513
if(debug){
518
fprintf(stderr, "Mandos plugin mandos-client: "
519
"Attempting to use OpenPGP public key %s and"
520
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
521
seckeyfilename);
514
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
515
" secret key %s as GnuTLS credentials\n",
516
pubkeyfilename,
517
seckeyfilename);
522
518
}
523
519
524
520
ret = gnutls_certificate_set_openpgp_key_file
525
521
(mc.cred, pubkeyfilename, seckeyfilename,
526
522
GNUTLS_OPENPGP_FMT_BASE64);
527
523
if(ret != GNUTLS_E_SUCCESS){
528
fprintf(stderr,
529
"Mandos plugin mandos-client: "
530
"Error[%d] while reading the OpenPGP key pair ('%s',"
531
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
532
fprintf(stderr, "Mandos plugin mandos-client: "
533
"The GnuTLS error is: %s\n", safer_gnutls_strerror(ret));
524
fprintf_plus(stderr,
525
"Error[%d] while reading the OpenPGP key pair ('%s',"
526
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
527
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
528
safer_gnutls_strerror(ret));
534
529
goto globalfail;
535
530
}
536
531
537
532
/* GnuTLS server initialization */
538
533
ret = gnutls_dh_params_init(&mc.dh_params);
539
534
if(ret != GNUTLS_E_SUCCESS){
540
fprintf(stderr, "Mandos plugin mandos-client: "
541
"Error in GnuTLS DH parameter initialization:"
542
" %s\n", safer_gnutls_strerror(ret));
535
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
536
" initialization: %s\n",
537
safer_gnutls_strerror(ret));
543
538
goto globalfail;
544
539
}
545
540
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
546
541
if(ret != GNUTLS_E_SUCCESS){
547
fprintf(stderr, "Mandos plugin mandos-client: "
548
"Error in GnuTLS prime generation: %s\n",
549
safer_gnutls_strerror(ret));
542
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
543
safer_gnutls_strerror(ret));
550
544
goto globalfail;
551
545
}
552
546
572
566
}
573
567
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
574
568
if(ret != GNUTLS_E_SUCCESS){
575
fprintf(stderr, "Mandos plugin mandos-client: "
576
"Error in GnuTLS session initialization: %s\n",
577
safer_gnutls_strerror(ret));
569
fprintf_plus(stderr,
570
"Error in GnuTLS session initialization: %s\n",
571
safer_gnutls_strerror(ret));
578
572
}
579
573
580
574
{
587
581
}
588
582
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
589
583
if(ret != GNUTLS_E_SUCCESS){
590
fprintf(stderr, "Mandos plugin mandos-client: "
591
"Syntax error at: %s\n", err);
592
fprintf(stderr, "Mandos plugin mandos-client: "
593
"GnuTLS error: %s\n", safer_gnutls_strerror(ret));
584
fprintf_plus(stderr, "Syntax error at: %s\n", err);
585
fprintf_plus(stderr, "GnuTLS error: %s\n",
586
safer_gnutls_strerror(ret));
594
587
gnutls_deinit(*session);
595
588
return -1;
596
589
}
605
598
}
606
599
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
607
600
if(ret != GNUTLS_E_SUCCESS){
608
fprintf(stderr, "Mandos plugin mandos-client: "
609
"Error setting GnuTLS credentials: %s\n",
610
safer_gnutls_strerror(ret));
601
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
602
safer_gnutls_strerror(ret));
611
603
gnutls_deinit(*session);
612
604
return -1;
613
605
}
658
650
pf = PF_INET;
659
651
break;
660
652
default:
661
fprintf(stderr, "Mandos plugin mandos-client: "
662
"Bad address family: %d\n", af);
653
fprintf_plus(stderr, "Bad address family: %d\n", af);
663
654
errno = EINVAL;
664
655
return -1;
665
656
}
670
661
}
671
662
672
663
if(debug){
673
fprintf(stderr, "Mandos plugin mandos-client: "
674
"Setting up a TCP connection to %s, port %" PRIu16
675
"\n", ip, port);
664
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
665
PRIu16 "\n", ip, port);
676
666
}
677
667
678
668
tcp_sd = socket(pf, SOCK_STREAM, 0);
704
694
}
705
695
if(ret == 0){
706
696
int e = errno;
707
fprintf(stderr, "Mandos plugin mandos-client: "
708
"Bad address: %s\n", ip);
697
fprintf_plus(stderr, "Bad address: %s\n", ip);
709
698
errno = e;
710
699
goto mandos_end;
711
700
}
718
707
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
719
708
-Wunreachable-code*/
720
709
if(if_index == AVAHI_IF_UNSPEC){
721
fprintf(stderr, "Mandos plugin mandos-client: "
722
"An IPv6 link-local address is incomplete"
723
" without a network interface\n");
710
fprintf_plus(stderr, "An IPv6 link-local address is"
711
" incomplete without a network interface\n");
724
712
errno = EINVAL;
725
713
goto mandos_end;
726
714
}
744
732
if(if_indextoname((unsigned int)if_index, interface) == NULL){
745
733
perror_plus("if_indextoname");
746
734
} else {
747
fprintf(stderr, "Mandos plugin mandos-client: "
748
"Connection to: %s%%%s, port %" PRIu16 "\n",
749
ip, interface, port);
735
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
736
"\n", ip, interface, port);
750
737
}
751
738
} else {
752
fprintf(stderr, "Mandos plugin mandos-client: "
753
"Connection to: %s, port %" PRIu16 "\n", ip, port);
739
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
740
ip, port);
754
741
}
755
742
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
756
743
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
766
753
perror_plus("inet_ntop");
767
754
} else {
768
755
if(strcmp(addrstr, ip) != 0){
769
fprintf(stderr, "Mandos plugin mandos-client: "
770
"Canonical address form: %s\n", addrstr);
756
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
771
757
}
772
758
}
773
759
}
827
813
}
828
814
829
815
if(debug){
830
fprintf(stderr, "Mandos plugin mandos-client: "
831
"Establishing TLS session with %s\n", ip);
816
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
832
817
}
833
818
834
819
if(quit_now){
836
821
goto mandos_end;
837
822
}
838
823
839
/* Spurious warning from -Wint-to-pointer-cast */
840
gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) tcp_sd);
824
/* This casting via intptr_t is to eliminate warning about casting
825
an int to a pointer type. This is exactly how the GnuTLS Guile
826
function "set-session-transport-fd!" does it. */
827
gnutls_transport_set_ptr(session,
828
(gnutls_transport_ptr_t)(intptr_t)tcp_sd);
841
829
842
830
if(quit_now){
843
831
errno = EINTR;
854
842
855
843
if(ret != GNUTLS_E_SUCCESS){
856
844
if(debug){
857
fprintf(stderr, "Mandos plugin mandos-client: "
858
"*** GnuTLS Handshake failed ***\n");
845
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
859
846
gnutls_perror(ret);
860
847
}
861
848
errno = EPROTO;
865
852
/* Read OpenPGP packet that contains the wanted password */
866
853
867
854
if(debug){
868
fprintf(stderr, "Mandos plugin mandos-client: "
869
"Retrieving OpenPGP encrypted password from %s\n", ip);
855
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
856
" %s\n", ip);
870
857
}
871
858
872
859
while(true){
910
897
}
911
898
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
912
899
if(ret < 0){
913
fprintf(stderr, "Mandos plugin mandos-client: "
914
"*** GnuTLS Re-handshake failed ***\n");
900
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
901
"***\n");
915
902
gnutls_perror(ret);
916
903
errno = EPROTO;
917
904
goto mandos_end;
918
905
}
919
906
break;
920
907
default:
921
fprintf(stderr, "Mandos plugin mandos-client: "
922
"Unknown error while reading data from"
923
" encrypted session with Mandos server\n");
908
fprintf_plus(stderr, "Unknown error while reading data from"
909
" encrypted session with Mandos server\n");
924
910
gnutls_bye(session, GNUTLS_SHUT_RDWR);
925
911
errno = EIO;
926
912
goto mandos_end;
931
917
}
932
918
933
919
if(debug){
934
fprintf(stderr, "Mandos plugin mandos-client: "
935
"Closing TLS session\n");
920
fprintf_plus(stderr, "Closing TLS session\n");
936
921
}
937
922
938
923
if(quit_now){
967
952
if(ret == 0 and ferror(stdout)){
968
953
int e = errno;
969
954
if(debug){
970
fprintf(stderr, "Mandos plugin mandos-client: "
971
"Error writing encrypted data: %s\n",
972
strerror(errno));
955
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
956
strerror(errno));
973
957
}
974
958
errno = e;
975
959
goto mandos_end;
1032
1016
switch(event){
1033
1017
default:
1034
1018
case AVAHI_RESOLVER_FAILURE:
1035
fprintf(stderr, "Mandos plugin mandos-client: "
1036
"(Avahi Resolver) Failed to resolve service '%s'"
1037
" of type '%s' in domain '%s': %s\n", name, type, domain,
1038
avahi_strerror(avahi_server_errno(mc.server)));
1019
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1020
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1021
domain,
1022
avahi_strerror(avahi_server_errno(mc.server)));
1039
1023
break;
1040
1024
1041
1025
case AVAHI_RESOLVER_FOUND:
1043
1027
char ip[AVAHI_ADDRESS_STR_MAX];
1044
1028
avahi_address_snprint(ip, sizeof(ip), address);
1045
1029
if(debug){
1046
fprintf(stderr, "Mandos plugin mandos-client: "
1047
"Mandos server \"%s\" found on %s (%s, %"
1048
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
1049
ip, (intmax_t)interface, port);
1030
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1031
PRIdMAX ") on port %" PRIu16 "\n", name,
1032
host_name, ip, (intmax_t)interface, port);
1050
1033
}
1051
1034
int ret = start_mandos_communication(ip, port, interface,
1052
1035
avahi_proto_to_af(proto));
1053
1036
if(ret == 0){
1054
1037
avahi_simple_poll_quit(mc.simple_poll);
1055
1038
} else {
1056
ret = add_server(ip, port, interface,
1057
avahi_proto_to_af(proto));
1039
if(not add_server(ip, port, interface,
1040
avahi_proto_to_af(proto))){
1041
fprintf_plus(stderr, "Failed to add server \"%s\" to server"
1042
" list\n", name);
1043
}
1058
1044
}
1059
1045
}
1060
1046
}
1084
1070
default:
1085
1071
case AVAHI_BROWSER_FAILURE:
1086
1072
1087
fprintf(stderr, "Mandos plugin mandos-client: "
1088
"(Avahi browser) %s\n",
1089
avahi_strerror(avahi_server_errno(mc.server)));
1073
fprintf_plus(stderr, "(Avahi browser) %s\n",
1074
avahi_strerror(avahi_server_errno(mc.server)));
1090
1075
avahi_simple_poll_quit(mc.simple_poll);
1091
1076
return;
1092
1077
1099
1084
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1100
1085
name, type, domain, protocol, 0,
1101
1086
resolve_callback, NULL) == NULL)
1102
fprintf(stderr, "Mandos plugin mandos-client: "
1103
"Avahi: Failed to resolve service '%s': %s\n",
1104
name, avahi_strerror(avahi_server_errno(mc.server)));
1087
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1088
" %s\n", name,
1089
avahi_strerror(avahi_server_errno(mc.server)));
1105
1090
break;
1106
1091
1107
1092
case AVAHI_BROWSER_REMOVE:
1110
1095
case AVAHI_BROWSER_ALL_FOR_NOW:
1111
1096
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1112
1097
if(debug){
1113
fprintf(stderr, "Mandos plugin mandos-client: "
1114
"No Mandos server found, still searching...\n");
1098
fprintf_plus(stderr, "No Mandos server found, still"
1099
" searching...\n");
1115
1100
}
1116
1101
break;
1117
1102
}
1156
1141
/* Reject the loopback device */
1157
1142
if(ifr->ifr_flags & IFF_LOOPBACK){
1158
1143
if(debug){
1159
fprintf(stderr, "Mandos plugin mandos-client: "
1160
"Rejecting loopback interface \"%s\"\n", ifname);
1144
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1145
ifname);
1161
1146
}
1162
1147
return false;
1163
1148
}
1164
1149
/* Accept point-to-point devices only if connect_to is specified */
1165
1150
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1166
1151
if(debug){
1167
fprintf(stderr, "Mandos plugin mandos-client: "
1168
"Accepting point-to-point interface \"%s\"\n", ifname);
1152
fprintf_plus(stderr, "Accepting point-to-point interface"
1153
" \"%s\"\n", ifname);
1169
1154
}
1170
1155
return true;
1171
1156
}
1172
1157
/* Otherwise, reject non-broadcast-capable devices */
1173
1158
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1174
1159
if(debug){
1175
fprintf(stderr, "Mandos plugin mandos-client: "
1176
"Rejecting non-broadcast interface \"%s\"\n", ifname);
1160
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1161
" \"%s\"\n", ifname);
1177
1162
}
1178
1163
return false;
1179
1164
}
1180
1165
/* Reject non-ARP interfaces (including dummy interfaces) */
1181
1166
if(ifr->ifr_flags & IFF_NOARP){
1182
1167
if(debug){
1183
fprintf(stderr, "Mandos plugin mandos-client: "
1184
"Rejecting non-ARP interface \"%s\"\n", ifname);
1168
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1169
ifname);
1185
1170
}
1186
1171
return false;
1187
1172
}
1188
1173
1189
1174
/* Accept this device */
1190
1175
if(debug){
1191
fprintf(stderr, "Mandos plugin mandos-client: "
1192
"Interface \"%s\" is good\n", ifname);
1176
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1193
1177
}
1194
1178
return true;
1195
1179
}
1207
1191
struct ifreq ifr;
1208
1192
if(not get_flags(if_entry->d_name, &ifr)){
1209
1193
if(debug){
1210
fprintf(stderr, "Mandos plugin mandos-client: "
1211
"Failed to get flags for interface \"%s\"\n",
1212
if_entry->d_name);
1194
fprintf_plus(stderr, "Failed to get flags for interface "
1195
"\"%s\"\n", if_entry->d_name);
1213
1196
}
1214
1197
return 0;
1215
1198
}
1233
1216
struct ifreq ifr;
1234
1217
if(not get_flags(if_entry->d_name, &ifr)){
1235
1218
if(debug){
1236
fprintf(stderr, "Mandos plugin mandos-client: "
1237
"Failed to get flags for interface \"%s\"\n",
1238
if_entry->d_name);
1219
fprintf_plus(stderr, "Failed to get flags for interface "
1220
"\"%s\"\n", if_entry->d_name);
1239
1221
}
1240
1222
return 0;
1241
1223
}
1243
1225
/* Reject down interfaces */
1244
1226
if(not (ifr.ifr_flags & IFF_UP)){
1245
1227
if(debug){
1246
fprintf(stderr, "Mandos plugin mandos-client: "
1247
"Rejecting down interface \"%s\"\n",
1248
if_entry->d_name);
1228
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1229
if_entry->d_name);
1249
1230
}
1250
1231
return 0;
1251
1232
}
1253
1234
/* Reject non-running interfaces */
1254
1235
if(not (ifr.ifr_flags & IFF_RUNNING)){
1255
1236
if(debug){
1256
fprintf(stderr, "Mandos plugin mandos-client: "
1257
"Rejecting non-running interface \"%s\"\n",
1258
if_entry->d_name);
1237
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1238
if_entry->d_name);
1259
1239
}
1260
1240
return 0;
1261
1241
}
1295
1275
if((direntry->d_name)[sret] != '\0'){
1296
1276
/* Contains non-allowed characters */
1297
1277
if(debug){
1298
fprintf(stderr, "Mandos plugin mandos-client: "
1299
"Ignoring hook \"%s\" with bad name\n",
1300
direntry->d_name);
1278
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1279
direntry->d_name);
1301
1280
}
1302
1281
return 0;
1303
1282
}
1319
1298
if(not (S_ISREG(st.st_mode))){
1320
1299
/* Not a regular file */
1321
1300
if(debug){
1322
fprintf(stderr, "Mandos plugin mandos-client: "
1323
"Ignoring hook \"%s\" - not a file\n",
1324
direntry->d_name);
1301
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1302
direntry->d_name);
1325
1303
}
1326
1304
return 0;
1327
1305
}
1328
1306
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1329
1307
/* Not executable */
1330
1308
if(debug){
1331
fprintf(stderr, "Mandos plugin mandos-client: "
1332
"Ignoring hook \"%s\" - not executable\n",
1333
direntry->d_name);
1309
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1310
direntry->d_name);
1334
1311
}
1335
1312
return 0;
1336
1313
}
1314
if(debug){
1315
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1316
direntry->d_name);
1317
}
1337
1318
return 1;
1338
1319
}
1339
1320
1346
1327
while(true){
1347
1328
if(mc.current_server == NULL){
1348
1329
if (debug){
1349
fprintf(stderr, "Mandos plugin mandos-client: "
1350
"Wait until first server is found. No timeout!\n");
1330
fprintf_plus(stderr, "Wait until first server is found."
1331
" No timeout!\n");
1351
1332
}
1352
1333
ret = avahi_simple_poll_iterate(s, -1);
1353
1334
} else {
1354
1335
if (debug){
1355
fprintf(stderr, "Mandos plugin mandos-client: "
1356
"Check current_server if we should run it,"
1357
" or wait\n");
1336
fprintf_plus(stderr, "Check current_server if we should run"
1337
" it, or wait\n");
1358
1338
}
1359
1339
/* the current time */
1360
1340
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1376
1356
- ((intmax_t)waited_time.tv_nsec / 1000000));
1377
1357
1378
1358
if (debug){
1379
fprintf(stderr, "Mandos plugin mandos-client: "
1380
"Blocking for %" PRIdMAX " ms\n", block_time);
1359
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1360
block_time);
1381
1361
}
1382
1362
1383
1363
if(block_time <= 0){
1410
1390
}
1411
1391
}
1412
1392
1393
bool run_network_hooks(const char *mode, const char *interface,
1394
const float delay){
1395
struct dirent **direntries;
1396
struct dirent *direntry;
1397
int ret;
1398
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1399
alphasort);
1400
if(numhooks == -1){
1401
perror_plus("scandir");
1402
} else {
1403
int devnull = open("/dev/null", O_RDONLY);
1404
for(int i = 0; i < numhooks; i++){
1405
direntry = direntries[i];
1406
char *fullname = NULL;
1407
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1408
if(ret < 0){
1409
perror_plus("asprintf");
1410
continue;
1411
}
1412
if(debug){
1413
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1414
direntry->d_name);
1415
}
1416
pid_t hook_pid = fork();
1417
if(hook_pid == 0){
1418
/* Child */
1419
/* Raise privileges */
1420
errno = 0;
1421
ret = seteuid(0);
1422
if(ret == -1){
1423
perror_plus("seteuid");
1424
}
1425
/* Raise privileges even more */
1426
errno = 0;
1427
ret = setuid(0);
1428
if(ret == -1){
1429
perror_plus("setuid");
1430
}
1431
/* Set group */
1432
errno = 0;
1433
ret = setgid(0);
1434
if(ret == -1){
1435
perror_plus("setgid");
1436
}
1437
/* Reset supplementary groups */
1438
errno = 0;
1439
ret = setgroups(0, NULL);
1440
if(ret == -1){
1441
perror_plus("setgroups");
1442
}
1443
dup2(devnull, STDIN_FILENO);
1444
close(devnull);
1445
dup2(STDERR_FILENO, STDOUT_FILENO);
1446
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1447
if(ret == -1){
1448
perror_plus("setenv");
1449
_exit(EX_OSERR);
1450
}
1451
ret = setenv("DEVICE", interface, 1);
1452
if(ret == -1){
1453
perror_plus("setenv");
1454
_exit(EX_OSERR);
1455
}
1456
ret = setenv("VERBOSITY", debug ? "1" : "0", 1);
1457
if(ret == -1){
1458
perror_plus("setenv");
1459
_exit(EX_OSERR);
1460
}
1461
ret = setenv("MODE", mode, 1);
1462
if(ret == -1){
1463
perror_plus("setenv");
1464
_exit(EX_OSERR);
1465
}
1466
char *delaystring;
1467
ret = asprintf(&delaystring, "%f", delay);
1468
if(ret == -1){
1469
perror_plus("asprintf");
1470
_exit(EX_OSERR);
1471
}
1472
ret = setenv("DELAY", delaystring, 1);
1473
if(ret == -1){
1474
free(delaystring);
1475
perror_plus("setenv");
1476
_exit(EX_OSERR);
1477
}
1478
free(delaystring);
1479
if(connect_to != NULL){
1480
ret = setenv("CONNECT", connect_to, 1);
1481
if(ret == -1){
1482
perror_plus("setenv");
1483
_exit(EX_OSERR);
1484
}
1485
}
1486
if(execl(fullname, direntry->d_name, mode, NULL) == -1){
1487
perror_plus("execl");
1488
_exit(EXIT_FAILURE);
1489
}
1490
} else {
1491
int status;
1492
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1493
perror_plus("waitpid");
1494
free(fullname);
1495
continue;
1496
}
1497
if(WIFEXITED(status)){
1498
if(WEXITSTATUS(status) != 0){
1499
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1500
" with status %d\n", direntry->d_name,
1501
WEXITSTATUS(status));
1502
free(fullname);
1503
continue;
1504
}
1505
} else if(WIFSIGNALED(status)){
1506
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1507
" signal %d\n", direntry->d_name,
1508
WTERMSIG(status));
1509
free(fullname);
1510
continue;
1511
} else {
1512
fprintf_plus(stderr, "Warning: network hook \"%s\""
1513
" crashed\n", direntry->d_name);
1514
free(fullname);
1515
continue;
1516
}
1517
}
1518
free(fullname);
1519
if(debug){
1520
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1521
direntry->d_name);
1522
}
1523
}
1524
close(devnull);
1525
}
1526
return true;
1527
}
1528
1413
1529
int main(int argc, char *argv[]){
1414
1530
AvahiSServiceBrowser *sb = NULL;
1415
1531
int error;
1495
1611
.group = 2 },
1496
1612
{ .name = "retry", .key = 132,
1497
1613
.arg = "SECONDS",
1498
.doc = "Retry interval used when denied by the mandos server",
1614
.doc = "Retry interval used when denied by the Mandos server",
1499
1615
.group = 2 },
1500
1616
{ .name = "network-hook-dir", .key = 133,
1501
1617
.arg = "DIR",
1573
1689
argp_state_help(state, state->out_stream,
1574
1690
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1575
1691
case 'V': /* --version */
1576
fprintf(state->out_stream, "Mandos plugin mandos-client: ");
1577
fprintf(state->out_stream, "%s\n", argp_program_version);
1692
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1578
1693
exit(argp_err_exit_status);
1579
1694
break;
1580
1695
default:
1607
1722
{
1608
1723
/* Work around Debian bug #633582:
1609
1724
<http://bugs.debian.org/633582> */
1610
struct stat st;
1611
1725
1612
1726
/* Re-raise priviliges */
1613
1727
errno = 0;
1614
1728
ret = seteuid(0);
1615
1729
if(ret == -1){
1616
1730
perror_plus("seteuid");
1617
}
1618
1619
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1620
int seckey_fd = open(seckey, O_RDONLY);
1621
if(seckey_fd == -1){
1622
perror_plus("open");
1623
} else {
1624
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1625
if(ret == -1){
1626
perror_plus("fstat");
1627
} else {
1628
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1629
ret = fchown(seckey_fd, uid, gid);
1630
if(ret == -1){
1631
perror_plus("fchown");
1632
}
1633
}
1634
}
1635
TEMP_FAILURE_RETRY(close(seckey_fd));
1636
}
1637
}
1638
1639
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1640
int pubkey_fd = open(pubkey, O_RDONLY);
1641
if(pubkey_fd == -1){
1642
perror_plus("open");
1643
} else {
1644
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1645
if(ret == -1){
1646
perror_plus("fstat");
1647
} else {
1648
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1649
ret = fchown(pubkey_fd, uid, gid);
1650
if(ret == -1){
1651
perror_plus("fchown");
1652
}
1653
}
1654
}
1655
TEMP_FAILURE_RETRY(close(pubkey_fd));
1656
}
1657
}
1658
1659
/* Lower privileges */
1660
errno = 0;
1661
ret = seteuid(uid);
1662
if(ret == -1){
1663
perror_plus("seteuid");
1664
}
1665
}
1666
1667
/* Find network hooks and run them */
1668
{
1669
struct dirent **direntries;
1670
struct dirent *direntry;
1671
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1672
alphasort);
1673
if(numhooks == -1){
1674
perror_plus("scandir");
1675
1731
} else {
1676
int devnull = open("/dev/null", O_RDONLY);
1677
for(int i = 0; i < numhooks; i++){
1678
direntry = direntries[0];
1679
char *fullname = NULL;
1680
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1681
if(ret < 0){
1682
perror_plus("asprintf");
1683
continue;
1684
}
1685
pid_t hook_pid = fork();
1686
if(hook_pid == 0){
1687
/* Child */
1688
dup2(devnull, STDIN_FILENO);
1689
close(devnull);
1690
dup2(STDERR_FILENO, STDOUT_FILENO);
1691
ret = setenv("DEVICE", interface, 1);
1692
if(ret == -1){
1693
perror_plus("setenv");
1694
exit(1);
1695
}
1696
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1697
if(ret == -1){
1698
perror_plus("setenv");
1699
exit(1);
1700
}
1701
ret = setenv("MODE", "start", 1);
1702
if(ret == -1){
1703
perror_plus("setenv");
1704
exit(1);
1705
}
1706
char *delaystring;
1707
ret = asprintf(&delaystring, "%f", delay);
1708
if(ret == -1){
1709
perror_plus("asprintf");
1710
exit(1);
1711
}
1712
ret = setenv("DELAY", delaystring, 1);
1713
if(ret == -1){
1714
free(delaystring);
1715
perror_plus("setenv");
1716
exit(1);
1717
}
1718
free(delaystring);
1719
ret = execl(fullname, direntry->d_name, "start", NULL);
1720
perror_plus("execl");
1721
} else {
1722
int status;
1723
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1724
perror_plus("waitpid");
1725
free(fullname);
1726
continue;
1727
}
1728
if(WIFEXITED(status)){
1729
if(WEXITSTATUS(status) != 0){
1730
fprintf(stderr, "Mandos plugin mandos-client: "
1731
"Warning: network hook \"%s\" exited"
1732
" with status %d\n", direntry->d_name,
1733
WEXITSTATUS(status));
1734
free(fullname);
1735
continue;
1736
}
1737
} else if(WIFSIGNALED(status)){
1738
fprintf(stderr, "Mandos plugin mandos-client: "
1739
"Warning: network hook \"%s\" died by"
1740
" signal %d\n", direntry->d_name,
1741
WTERMSIG(status));
1742
free(fullname);
1743
continue;
1744
} else {
1745
fprintf(stderr, "Mandos plugin mandos-client: "
1746
"Warning: network hook \"%s\" crashed\n",
1747
direntry->d_name);
1748
free(fullname);
1749
continue;
1750
}
1751
}
1752
free(fullname);
1753
if(quit_now){
1754
goto end;
1755
}
1756
}
1757
close(devnull);
1732
struct stat st;
1733
1734
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1735
int seckey_fd = open(seckey, O_RDONLY);
1736
if(seckey_fd == -1){
1737
perror_plus("open");
1738
} else {
1739
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1740
if(ret == -1){
1741
perror_plus("fstat");
1742
} else {
1743
if(S_ISREG(st.st_mode)
1744
and st.st_uid == 0 and st.st_gid == 0){
1745
ret = fchown(seckey_fd, uid, gid);
1746
if(ret == -1){
1747
perror_plus("fchown");
1748
}
1749
}
1750
}
1751
TEMP_FAILURE_RETRY(close(seckey_fd));
1752
}
1753
}
1754
1755
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1756
int pubkey_fd = open(pubkey, O_RDONLY);
1757
if(pubkey_fd == -1){
1758
perror_plus("open");
1759
} else {
1760
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1761
if(ret == -1){
1762
perror_plus("fstat");
1763
} else {
1764
if(S_ISREG(st.st_mode)
1765
and st.st_uid == 0 and st.st_gid == 0){
1766
ret = fchown(pubkey_fd, uid, gid);
1767
if(ret == -1){
1768
perror_plus("fchown");
1769
}
1770
}
1771
}
1772
TEMP_FAILURE_RETRY(close(pubkey_fd));
1773
}
1774
}
1775
1776
/* Lower privileges */
1777
errno = 0;
1778
ret = seteuid(uid);
1779
if(ret == -1){
1780
perror_plus("seteuid");
1781
}
1758
1782
}
1759
1783
}
1760
1784
1785
/* Run network hooks */
1786
if(not run_network_hooks("start", interface, delay)){
1787
goto end;
1788
}
1789
1761
1790
if(not debug){
1762
1791
avahi_set_log_function(empty_log);
1763
1792
}
1777
1806
/* Pick the first interface returned */
1778
1807
interface = strdup(direntries[0]->d_name);
1779
1808
if(debug){
1780
fprintf(stderr, "Mandos plugin mandos-client: "
1781
"Using interface \"%s\"\n", interface);
1809
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1782
1810
}
1783
1811
if(interface == NULL){
1784
1812
perror_plus("malloc");
1789
1817
free(direntries);
1790
1818
} else {
1791
1819
free(direntries);
1792
fprintf(stderr, "Mandos plugin mandos-client: "
1793
"Could not find a network interface\n");
1820
fprintf_plus(stderr, "Could not find a network interface\n");
1794
1821
exitcode = EXIT_FAILURE;
1795
1822
goto end;
1796
1823
}
1802
1829
srand((unsigned int) time(NULL));
1803
1830
mc.simple_poll = avahi_simple_poll_new();
1804
1831
if(mc.simple_poll == NULL){
1805
fprintf(stderr, "Mandos plugin mandos-client: "
1806
"Avahi: Failed to create simple poll object.\n");
1832
fprintf_plus(stderr,
1833
"Avahi: Failed to create simple poll object.\n");
1807
1834
exitcode = EX_UNAVAILABLE;
1808
1835
goto end;
1809
1836
}
1875
1902
if(strcmp(interface, "none") != 0){
1876
1903
if_index = (AvahiIfIndex) if_nametoindex(interface);
1877
1904
if(if_index == 0){
1878
fprintf(stderr, "Mandos plugin mandos-client: "
1879
"No such interface: \"%s\"\n", interface);
1905
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1880
1906
exitcode = EX_UNAVAILABLE;
1881
1907
goto end;
1882
1908
}
2002
2028
#endif /* __linux__ */
2003
2029
/* Lower privileges */
2004
2030
errno = 0;
2005
if(take_down_interface){
2006
/* Lower privileges */
2007
ret = seteuid(uid);
2008
if(ret == -1){
2009
perror_plus("seteuid");
2010
}
2011
} else {
2012
/* Lower privileges permanently */
2013
ret = setuid(uid);
2014
if(ret == -1){
2015
perror_plus("setuid");
2016
}
2031
/* Lower privileges */
2032
ret = seteuid(uid);
2033
if(ret == -1){
2034
perror_plus("seteuid");
2017
2035
}
2018
2036
}
2019
2037
2023
2041
2024
2042
ret = init_gnutls_global(pubkey, seckey);
2025
2043
if(ret == -1){
2026
fprintf(stderr, "Mandos plugin mandos-client: "
2027
"init_gnutls_global failed\n");
2044
fprintf_plus(stderr, "init_gnutls_global failed\n");
2028
2045
exitcode = EX_UNAVAILABLE;
2029
2046
goto end;
2030
2047
} else {
2046
2063
}
2047
2064
2048
2065
if(not init_gpgme(pubkey, seckey, tempdir)){
2049
fprintf(stderr, "Mandos plugin mandos-client: "
2050
"init_gpgme failed\n");
2066
fprintf_plus(stderr, "init_gpgme failed\n");
2051
2067
exitcode = EX_UNAVAILABLE;
2052
2068
goto end;
2053
2069
} else {
2063
2079
/* (Mainly meant for debugging) */
2064
2080
char *address = strrchr(connect_to, ':');
2065
2081
if(address == NULL){
2066
fprintf(stderr, "Mandos plugin mandos-client: "
2067
"No colon in address\n");
2082
fprintf_plus(stderr, "No colon in address\n");
2068
2083
exitcode = EX_USAGE;
2069
2084
goto end;
2070
2085
}
2078
2093
tmpmax = strtoimax(address+1, &tmp, 10);
2079
2094
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2080
2095
or tmpmax != (uint16_t)tmpmax){
2081
fprintf(stderr, "Mandos plugin mandos-client: "
2082
"Bad port number\n");
2096
fprintf_plus(stderr, "Bad port number\n");
2083
2097
exitcode = EX_USAGE;
2084
2098
goto end;
2085
2099
}
2115
2129
break;
2116
2130
}
2117
2131
if(debug){
2118
fprintf(stderr, "Mandos plugin mandos-client: "
2119
"Retrying in %d seconds\n", (int)retry_interval);
2132
fprintf_plus(stderr, "Retrying in %d seconds\n",
2133
(int)retry_interval);
2120
2134
}
2121
2135
sleep((int)retry_interval);
2122
2136
}
2152
2166
2153
2167
/* Check if creating the Avahi server object succeeded */
2154
2168
if(mc.server == NULL){
2155
fprintf(stderr, "Mandos plugin mandos-client: "
2156
"Failed to create Avahi server: %s\n",
2157
avahi_strerror(error));
2169
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2170
avahi_strerror(error));
2158
2171
exitcode = EX_UNAVAILABLE;
2159
2172
goto end;
2160
2173
}
2168
2181
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2169
2182
NULL, 0, browse_callback, NULL);
2170
2183
if(sb == NULL){
2171
fprintf(stderr, "Mandos plugin mandos-client: "
2172
"Failed to create service browser: %s\n",
2173
avahi_strerror(avahi_server_errno(mc.server)));
2184
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2185
avahi_strerror(avahi_server_errno(mc.server)));
2174
2186
exitcode = EX_UNAVAILABLE;
2175
2187
goto end;
2176
2188
}
2182
2194
/* Run the main loop */
2183
2195
2184
2196
if(debug){
2185
fprintf(stderr, "Mandos plugin mandos-client: "
2186
"Starting Avahi loop search\n");
2197
fprintf_plus(stderr, "Starting Avahi loop search\n");
2187
2198
}
2188
2199
2189
2200
ret = avahi_loop_with_timeout(mc.simple_poll,
2190
2201
(int)(retry_interval * 1000));
2191
2202
if(debug){
2192
fprintf(stderr, "Mandos plugin mandos-client: "
2193
"avahi_loop_with_timeout exited %s\n",
2194
(ret == 0) ? "successfully" : "with error");
2203
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2204
(ret == 0) ? "successfully" : "with error");
2195
2205
}
2196
2206
2197
2207
end:
2198
2208
2199
2209
if(debug){
2200
fprintf(stderr, "Mandos plugin mandos-client: "
2201
"%s exiting\n", argv[0]);
2210
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2202
2211
}
2203
2212
2204
2213
/* Cleanup things */
2220
2229
if(gpgme_initialized){
2221
2230
gpgme_release(mc.ctx);
2222
2231
}
2223
2232
2224
2233
/* Cleans up the circular linked list of Mandos servers the client
2225
2234
has seen */
2226
2235
if(mc.current_server != NULL){
2232
2241
}
2233
2242
}
2234
2243
2235
/* XXX run network hooks "stop" here */
2244
/* Run network hooks */
2245
run_network_hooks("stop", interface, delay);
2236
2246
2237
/* Take down the network interface */
2238
if(take_down_interface){
2239
/* Re-raise priviliges */
2247
/* Re-raise priviliges */
2248
{
2240
2249
errno = 0;
2241
2250
ret = seteuid(0);
2242
2251
if(ret == -1){
2243
2252
perror_plus("seteuid");
2244
2253
}
2245
if(geteuid() == 0){
2254
2255
/* Take down the network interface */
2256
if(take_down_interface and geteuid() == 0){
2246
2257
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2247
2258
if(ret == -1){
2248
2259
perror_plus("ioctl SIOCGIFFLAGS");
2257
2268
if(ret == -1){
2258
2269
perror_plus("close");
2259
2270
}
2260
/* Lower privileges permanently */
2261
errno = 0;
2262
ret = setuid(uid);
2263
if(ret == -1){
2264
perror_plus("setuid");
2265
}
2266
2271
}
2267
2272
}
2273
/* Lower privileges permanently */
2274
errno = 0;
2275
ret = setuid(uid);
2276
if(ret == -1){
2277
perror_plus("setuid");
2278
}
2268
2279
2269
2280
/* Removes the GPGME temp directory and all files inside */
2270
2281
if(tempdir_created){
2284
2295
}
2285
2296
ret = remove(fullname);
2286
2297
if(ret == -1){
2287
fprintf(stderr, "Mandos plugin mandos-client: "
2288
"remove(\"%s\"): %s\n", fullname, strerror(errno));
2298
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2299
strerror(errno));
2289
2300
}
2290
2301
free(fullname);
2291
2302
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0