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- Committer: teddy at bsnet
- Date: 2011-11-11 15:05:27 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-20111111150527-hdlgk1hkubtbth10
* plugins.d/mandos-client.c (good_interface): Add error message.
(up_interface): Use get_flags() and good_flags(). Also check the
IFF_RUNNING flags.
(runnable_hook): Bug fix: Add NULL to execl() call.
(main): Use network interfaces which are up and running in
preference to any other interfaces.
(up_interface): Use get_flags() and good_flags(). Also check the
IFF_RUNNING flags.
(runnable_hook): Bug fix: Add NULL to execl() call.
(main): Use network interfaces which are up and running in
preference to any other interfaces.
- files removed:
- network-hooks.d
- files modified:
- Makefile
added
removed
plugins.d/mandos-client.c
73
73
*/
74
74
#include <unistd.h> /* close(), SEEK_SET, off_t, write(),
75
75
getuid(), getgid(), seteuid(),
76
setgid(), pause(), _exit() */
76
setgid(), pause() */
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
85
85
raise() */
86
86
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
87
87
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
88
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
89
WEXITSTATUS(), WTERMSIG() */
90
#include <grp.h> /* setgroups() */
91
88
92
89
#ifdef __linux__
93
90
#include <sys/klog.h> /* klogctl() */
111
108
init_gnutls_session(),
112
109
GNUTLS_* */
113
110
#include <gnutls/openpgp.h>
114
/* gnutls_certificate_set_openpgp_key_file(),
115
GNUTLS_OPENPGP_FMT_BASE64 */
111
/* gnutls_certificate_set_openpgp_key_file(),
112
GNUTLS_OPENPGP_FMT_BASE64 */
116
113
117
114
/* GPGME */
118
115
#include <gpgme.h> /* All GPGME types, constants and
134
131
const char *argp_program_bug_address = "<mandos@recompile.se>";
135
132
static const char sys_class_net[] = "/sys/class/net";
136
133
char *connect_to = NULL;
137
const char *hookdir = HOOKDIR;
138
134
139
135
/* Doubly linked list that need to be circularly linked when used */
140
136
typedef struct server{
175
171
perror(print_text);
176
172
}
177
173
178
int fprintf_plus(FILE *stream, const char *format, ...){
179
va_list ap;
180
va_start (ap, format);
181
182
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
183
program_invocation_short_name));
184
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
185
}
186
187
174
/*
188
175
* Make additional room in "buffer" for at least BUFFER_SIZE more
189
176
* bytes. "buffer_capacity" is how much is currently allocated,
190
177
* "buffer_length" is how much is already used.
191
178
*/
192
179
size_t incbuffer(char **buffer, size_t buffer_length,
193
size_t buffer_capacity){
180
size_t buffer_capacity){
194
181
if(buffer_length + BUFFER_SIZE > buffer_capacity){
195
182
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
196
183
if(buffer == NULL){
202
189
}
203
190
204
191
/* Add server to set of servers to retry periodically */
205
int add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
206
int af){
192
int add_server(const char *ip, uint16_t port,
193
AvahiIfIndex if_index,
194
int af){
207
195
int ret;
208
196
server *new_server = malloc(sizeof(server));
209
197
if(new_server == NULL){
211
199
return -1;
212
200
}
213
201
*new_server = (server){ .ip = strdup(ip),
214
.port = port,
215
.if_index = if_index,
216
.af = af };
202
.port = port,
203
.if_index = if_index,
204
.af = af };
217
205
if(new_server->ip == NULL){
218
206
perror_plus("strdup");
219
207
return -1;
241
229
/*
242
230
* Initialize GPGME.
243
231
*/
244
static bool init_gpgme(const char *seckey, const char *pubkey,
245
const char *tempdir){
232
static bool init_gpgme(const char *seckey,
233
const char *pubkey, const char *tempdir){
246
234
gpgme_error_t rc;
247
235
gpgme_engine_info_t engine_info;
248
236
263
251
264
252
rc = gpgme_data_new_from_fd(&pgp_data, fd);
265
253
if(rc != GPG_ERR_NO_ERROR){
266
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
267
gpgme_strsource(rc), gpgme_strerror(rc));
254
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
255
gpgme_strsource(rc), gpgme_strerror(rc));
268
256
return false;
269
257
}
270
258
271
259
rc = gpgme_op_import(mc.ctx, pgp_data);
272
260
if(rc != GPG_ERR_NO_ERROR){
273
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
274
gpgme_strsource(rc), gpgme_strerror(rc));
261
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
262
gpgme_strsource(rc), gpgme_strerror(rc));
275
263
return false;
276
264
}
277
265
284
272
}
285
273
286
274
if(debug){
287
fprintf_plus(stderr, "Initializing GPGME\n");
275
fprintf(stderr, "Initializing GPGME\n");
288
276
}
289
277
290
278
/* Init GPGME */
291
279
gpgme_check_version(NULL);
292
280
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
293
281
if(rc != GPG_ERR_NO_ERROR){
294
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
295
gpgme_strsource(rc), gpgme_strerror(rc));
282
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
283
gpgme_strsource(rc), gpgme_strerror(rc));
296
284
return false;
297
285
}
298
286
299
287
/* Set GPGME home directory for the OpenPGP engine only */
300
288
rc = gpgme_get_engine_info(&engine_info);
301
289
if(rc != GPG_ERR_NO_ERROR){
302
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
303
gpgme_strsource(rc), gpgme_strerror(rc));
290
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
291
gpgme_strsource(rc), gpgme_strerror(rc));
304
292
return false;
305
293
}
306
294
while(engine_info != NULL){
312
300
engine_info = engine_info->next;
313
301
}
314
302
if(engine_info == NULL){
315
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
316
tempdir);
303
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
317
304
return false;
318
305
}
319
306
320
307
/* Create new GPGME "context" */
321
308
rc = gpgme_new(&(mc.ctx));
322
309
if(rc != GPG_ERR_NO_ERROR){
323
fprintf_plus(stderr, "Mandos plugin mandos-client: "
324
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
325
gpgme_strerror(rc));
310
fprintf(stderr, "bad gpgme_new: %s: %s\n",
311
gpgme_strsource(rc), gpgme_strerror(rc));
326
312
return false;
327
313
}
328
314
347
333
ssize_t plaintext_length = 0;
348
334
349
335
if(debug){
350
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
336
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
351
337
}
352
338
353
339
/* Create new GPGME data buffer from memory cryptotext */
354
340
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
355
341
0);
356
342
if(rc != GPG_ERR_NO_ERROR){
357
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
358
gpgme_strsource(rc), gpgme_strerror(rc));
343
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
344
gpgme_strsource(rc), gpgme_strerror(rc));
359
345
return -1;
360
346
}
361
347
362
348
/* Create new empty GPGME data buffer for the plaintext */
363
349
rc = gpgme_data_new(&dh_plain);
364
350
if(rc != GPG_ERR_NO_ERROR){
365
fprintf_plus(stderr, "Mandos plugin mandos-client: "
366
"bad gpgme_data_new: %s: %s\n",
367
gpgme_strsource(rc), gpgme_strerror(rc));
351
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
352
gpgme_strsource(rc), gpgme_strerror(rc));
368
353
gpgme_data_release(dh_crypto);
369
354
return -1;
370
355
}
373
358
data buffer */
374
359
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
375
360
if(rc != GPG_ERR_NO_ERROR){
376
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
377
gpgme_strsource(rc), gpgme_strerror(rc));
361
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
362
gpgme_strsource(rc), gpgme_strerror(rc));
378
363
plaintext_length = -1;
379
364
if(debug){
380
365
gpgme_decrypt_result_t result;
381
366
result = gpgme_op_decrypt_result(mc.ctx);
382
367
if(result == NULL){
383
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
368
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
384
369
} else {
385
fprintf_plus(stderr, "Unsupported algorithm: %s\n",
386
result->unsupported_algorithm);
387
fprintf_plus(stderr, "Wrong key usage: %u\n",
388
result->wrong_key_usage);
370
fprintf(stderr, "Unsupported algorithm: %s\n",
371
result->unsupported_algorithm);
372
fprintf(stderr, "Wrong key usage: %u\n",
373
result->wrong_key_usage);
389
374
if(result->file_name != NULL){
390
fprintf_plus(stderr, "File name: %s\n", result->file_name);
375
fprintf(stderr, "File name: %s\n", result->file_name);
391
376
}
392
377
gpgme_recipient_t recipient;
393
378
recipient = result->recipients;
394
379
while(recipient != NULL){
395
fprintf_plus(stderr, "Public key algorithm: %s\n",
396
gpgme_pubkey_algo_name
397
(recipient->pubkey_algo));
398
fprintf_plus(stderr, "Key ID: %s\n", recipient->keyid);
399
fprintf_plus(stderr, "Secret key available: %s\n",
400
recipient->status == GPG_ERR_NO_SECKEY
401
? "No" : "Yes");
380
fprintf(stderr, "Public key algorithm: %s\n",
381
gpgme_pubkey_algo_name(recipient->pubkey_algo));
382
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
383
fprintf(stderr, "Secret key available: %s\n",
384
recipient->status == GPG_ERR_NO_SECKEY
385
? "No" : "Yes");
402
386
recipient = recipient->next;
403
387
}
404
388
}
407
391
}
408
392
409
393
if(debug){
410
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
394
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
411
395
}
412
396
413
397
/* Seek back to the beginning of the GPGME plaintext data buffer */
420
404
*plaintext = NULL;
421
405
while(true){
422
406
plaintext_capacity = incbuffer(plaintext,
423
(size_t)plaintext_length,
424
plaintext_capacity);
407
(size_t)plaintext_length,
408
plaintext_capacity);
425
409
if(plaintext_capacity == 0){
426
perror_plus("incbuffer");
427
plaintext_length = -1;
428
goto decrypt_end;
410
perror_plus("incbuffer");
411
plaintext_length = -1;
412
goto decrypt_end;
429
413
}
430
414
431
415
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
444
428
}
445
429
446
430
if(debug){
447
fprintf_plus(stderr, "Decrypted password is: ");
431
fprintf(stderr, "Decrypted password is: ");
448
432
for(ssize_t i = 0; i < plaintext_length; i++){
449
433
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
450
434
}
472
456
/* GnuTLS log function callback */
473
457
static void debuggnutls(__attribute__((unused)) int level,
474
458
const char* string){
475
fprintf_plus(stderr, "GnuTLS: %s", string);
459
fprintf(stderr, "GnuTLS: %s", string);
476
460
}
477
461
478
462
static int init_gnutls_global(const char *pubkeyfilename,
480
464
int ret;
481
465
482
466
if(debug){
483
fprintf_plus(stderr, "Initializing GnuTLS\n");
467
fprintf(stderr, "Initializing GnuTLS\n");
484
468
}
485
469
486
470
ret = gnutls_global_init();
487
471
if(ret != GNUTLS_E_SUCCESS){
488
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
489
safer_gnutls_strerror(ret));
472
fprintf(stderr, "GnuTLS global_init: %s\n",
473
safer_gnutls_strerror(ret));
490
474
return -1;
491
475
}
492
476
501
485
/* OpenPGP credentials */
502
486
ret = gnutls_certificate_allocate_credentials(&mc.cred);
503
487
if(ret != GNUTLS_E_SUCCESS){
504
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
505
safer_gnutls_strerror(ret));
488
fprintf(stderr, "GnuTLS memory error: %s\n",
489
safer_gnutls_strerror(ret));
506
490
gnutls_global_deinit();
507
491
return -1;
508
492
}
509
493
510
494
if(debug){
511
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
512
" secret key %s as GnuTLS credentials\n",
513
pubkeyfilename,
514
seckeyfilename);
495
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
496
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
497
seckeyfilename);
515
498
}
516
499
517
500
ret = gnutls_certificate_set_openpgp_key_file
518
501
(mc.cred, pubkeyfilename, seckeyfilename,
519
502
GNUTLS_OPENPGP_FMT_BASE64);
520
503
if(ret != GNUTLS_E_SUCCESS){
521
fprintf_plus(stderr,
522
"Error[%d] while reading the OpenPGP key pair ('%s',"
523
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
524
fprintf_plus(stderr, "The GnuTLS error is: %s\n",
525
safer_gnutls_strerror(ret));
504
fprintf(stderr,
505
"Error[%d] while reading the OpenPGP key pair ('%s',"
506
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
507
fprintf(stderr, "The GnuTLS error is: %s\n",
508
safer_gnutls_strerror(ret));
526
509
goto globalfail;
527
510
}
528
511
529
512
/* GnuTLS server initialization */
530
513
ret = gnutls_dh_params_init(&mc.dh_params);
531
514
if(ret != GNUTLS_E_SUCCESS){
532
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
533
" initialization: %s\n",
534
safer_gnutls_strerror(ret));
515
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
516
" %s\n", safer_gnutls_strerror(ret));
535
517
goto globalfail;
536
518
}
537
519
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
538
520
if(ret != GNUTLS_E_SUCCESS){
539
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
540
safer_gnutls_strerror(ret));
521
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
522
safer_gnutls_strerror(ret));
541
523
goto globalfail;
542
524
}
543
525
563
545
}
564
546
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
565
547
if(ret != GNUTLS_E_SUCCESS){
566
fprintf_plus(stderr,
567
"Error in GnuTLS session initialization: %s\n",
568
safer_gnutls_strerror(ret));
548
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
549
safer_gnutls_strerror(ret));
569
550
}
570
551
571
552
{
578
559
}
579
560
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
580
561
if(ret != GNUTLS_E_SUCCESS){
581
fprintf_plus(stderr, "Syntax error at: %s\n", err);
582
fprintf_plus(stderr, "GnuTLS error: %s\n",
583
safer_gnutls_strerror(ret));
562
fprintf(stderr, "Syntax error at: %s\n", err);
563
fprintf(stderr, "GnuTLS error: %s\n",
564
safer_gnutls_strerror(ret));
584
565
gnutls_deinit(*session);
585
566
return -1;
586
567
}
595
576
}
596
577
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
597
578
if(ret != GNUTLS_E_SUCCESS){
598
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
599
safer_gnutls_strerror(ret));
579
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
580
safer_gnutls_strerror(ret));
600
581
gnutls_deinit(*session);
601
582
return -1;
602
583
}
647
628
pf = PF_INET;
648
629
break;
649
630
default:
650
fprintf_plus(stderr, "Bad address family: %d\n", af);
631
fprintf(stderr, "Bad address family: %d\n", af);
651
632
errno = EINVAL;
652
633
return -1;
653
634
}
658
639
}
659
640
660
641
if(debug){
661
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
662
PRIu16 "\n", ip, port);
642
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
643
"\n", ip, port);
663
644
}
664
645
665
646
tcp_sd = socket(pf, SOCK_STREAM, 0);
691
672
}
692
673
if(ret == 0){
693
674
int e = errno;
694
fprintf_plus(stderr, "Bad address: %s\n", ip);
675
fprintf(stderr, "Bad address: %s\n", ip);
695
676
errno = e;
696
677
goto mandos_end;
697
678
}
702
683
703
684
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
704
685
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
705
-Wunreachable-code*/
686
-Wunreachable-code*/
706
687
if(if_index == AVAHI_IF_UNSPEC){
707
fprintf_plus(stderr, "An IPv6 link-local address is"
708
" incomplete without a network interface\n");
688
fprintf(stderr, "An IPv6 link-local address is incomplete"
689
" without a network interface\n");
709
690
errno = EINVAL;
710
691
goto mandos_end;
711
692
}
729
710
if(if_indextoname((unsigned int)if_index, interface) == NULL){
730
711
perror_plus("if_indextoname");
731
712
} else {
732
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
733
"\n", ip, interface, port);
713
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
714
ip, interface, port);
734
715
}
735
716
} else {
736
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
737
ip, port);
717
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
718
port);
738
719
}
739
720
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
740
721
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
750
731
perror_plus("inet_ntop");
751
732
} else {
752
733
if(strcmp(addrstr, ip) != 0){
753
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
734
fprintf(stderr, "Canonical address form: %s\n", addrstr);
754
735
}
755
736
}
756
737
}
784
765
while(true){
785
766
size_t out_size = strlen(out);
786
767
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
787
out_size - written));
768
out_size - written));
788
769
if(ret == -1){
789
770
int e = errno;
790
771
perror_plus("write");
810
791
}
811
792
812
793
if(debug){
813
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
794
fprintf(stderr, "Establishing TLS session with %s\n", ip);
814
795
}
815
796
816
797
if(quit_now){
836
817
837
818
if(ret != GNUTLS_E_SUCCESS){
838
819
if(debug){
839
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
820
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
840
821
gnutls_perror(ret);
841
822
}
842
823
errno = EPROTO;
846
827
/* Read OpenPGP packet that contains the wanted password */
847
828
848
829
if(debug){
849
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
850
" %s\n", ip);
830
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
831
ip);
851
832
}
852
833
853
834
while(true){
858
839
}
859
840
860
841
buffer_capacity = incbuffer(&buffer, buffer_length,
861
buffer_capacity);
842
buffer_capacity);
862
843
if(buffer_capacity == 0){
863
844
int e = errno;
864
845
perror_plus("incbuffer");
891
872
}
892
873
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
893
874
if(ret < 0){
894
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
895
"***\n");
875
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
896
876
gnutls_perror(ret);
897
877
errno = EPROTO;
898
878
goto mandos_end;
899
879
}
900
880
break;
901
881
default:
902
fprintf_plus(stderr, "Unknown error while reading data from"
903
" encrypted session with Mandos server\n");
882
fprintf(stderr, "Unknown error while reading data from"
883
" encrypted session with Mandos server\n");
904
884
gnutls_bye(session, GNUTLS_SHUT_RDWR);
905
885
errno = EIO;
906
886
goto mandos_end;
911
891
}
912
892
913
893
if(debug){
914
fprintf_plus(stderr, "Closing TLS session\n");
894
fprintf(stderr, "Closing TLS session\n");
915
895
}
916
896
917
897
if(quit_now){
929
909
930
910
if(buffer_length > 0){
931
911
ssize_t decrypted_buffer_size;
932
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
912
decrypted_buffer_size = pgp_packet_decrypt(buffer,
913
buffer_length,
933
914
&decrypted_buffer);
934
915
if(decrypted_buffer_size >= 0){
935
916
946
927
if(ret == 0 and ferror(stdout)){
947
928
int e = errno;
948
929
if(debug){
949
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
950
strerror(errno));
930
fprintf(stderr, "Error writing encrypted data: %s\n",
931
strerror(errno));
951
932
}
952
933
errno = e;
953
934
goto mandos_end;
1010
991
switch(event){
1011
992
default:
1012
993
case AVAHI_RESOLVER_FAILURE:
1013
fprintf_plus(stderr, "(Avahi Resolver) Failed to resolve service "
1014
"'%s' of type '%s' in domain '%s': %s\n", name, type,
1015
domain,
1016
avahi_strerror(avahi_server_errno(mc.server)));
994
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
995
" of type '%s' in domain '%s': %s\n", name, type, domain,
996
avahi_strerror(avahi_server_errno(mc.server)));
1017
997
break;
1018
998
1019
999
case AVAHI_RESOLVER_FOUND:
1021
1001
char ip[AVAHI_ADDRESS_STR_MAX];
1022
1002
avahi_address_snprint(ip, sizeof(ip), address);
1023
1003
if(debug){
1024
fprintf_plus(stderr, "Mandos server \"%s\" found on %s (%s, %"
1025
PRIdMAX ") on port %" PRIu16 "\n", name,
1026
host_name, ip, (intmax_t)interface, port);
1004
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
1005
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
1006
ip, (intmax_t)interface, port);
1027
1007
}
1028
1008
int ret = start_mandos_communication(ip, port, interface,
1029
1009
avahi_proto_to_af(proto));
1061
1041
default:
1062
1042
case AVAHI_BROWSER_FAILURE:
1063
1043
1064
fprintf_plus(stderr, "(Avahi browser) %s\n",
1065
avahi_strerror(avahi_server_errno(mc.server)));
1044
fprintf(stderr, "(Avahi browser) %s\n",
1045
avahi_strerror(avahi_server_errno(mc.server)));
1066
1046
avahi_simple_poll_quit(mc.simple_poll);
1067
1047
return;
1068
1048
1075
1055
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1076
1056
name, type, domain, protocol, 0,
1077
1057
resolve_callback, NULL) == NULL)
1078
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1079
" %s\n", name,
1080
avahi_strerror(avahi_server_errno(mc.server)));
1058
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
1059
name, avahi_strerror(avahi_server_errno(mc.server)));
1081
1060
break;
1082
1061
1083
1062
case AVAHI_BROWSER_REMOVE:
1086
1065
case AVAHI_BROWSER_ALL_FOR_NOW:
1087
1066
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1088
1067
if(debug){
1089
fprintf_plus(stderr, "No Mandos server found, still"
1090
" searching...\n");
1068
fprintf(stderr, "No Mandos server found, still searching...\n");
1091
1069
}
1092
1070
break;
1093
1071
}
1132
1110
/* Reject the loopback device */
1133
1111
if(ifr->ifr_flags & IFF_LOOPBACK){
1134
1112
if(debug){
1135
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1136
ifname);
1113
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1114
ifname);
1137
1115
}
1138
1116
return false;
1139
1117
}
1140
1118
/* Accept point-to-point devices only if connect_to is specified */
1141
1119
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1142
1120
if(debug){
1143
fprintf_plus(stderr, "Accepting point-to-point interface"
1144
" \"%s\"\n", ifname);
1121
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1122
ifname);
1145
1123
}
1146
1124
return true;
1147
1125
}
1148
1126
/* Otherwise, reject non-broadcast-capable devices */
1149
1127
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1150
1128
if(debug){
1151
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1152
" \"%s\"\n", ifname);
1129
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1130
ifname);
1153
1131
}
1154
1132
return false;
1155
1133
}
1156
1134
/* Reject non-ARP interfaces (including dummy interfaces) */
1157
1135
if(ifr->ifr_flags & IFF_NOARP){
1158
1136
if(debug){
1159
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1160
ifname);
1137
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n", ifname);
1161
1138
}
1162
1139
return false;
1163
1140
}
1164
1141
1165
1142
/* Accept this device */
1166
1143
if(debug){
1167
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1144
fprintf(stderr, "Interface \"%s\" is good\n", ifname);
1168
1145
}
1169
1146
return true;
1170
1147
}
1182
1159
struct ifreq ifr;
1183
1160
if(not get_flags(if_entry->d_name, &ifr)){
1184
1161
if(debug){
1185
fprintf_plus(stderr, "Failed to get flags for interface "
1186
"\"%s\"\n", if_entry->d_name);
1162
fprintf(stderr, "Failed to get flags for interface \"%s\"\n",
1163
if_entry->d_name);
1187
1164
}
1188
1165
return 0;
1189
1166
}
1207
1184
struct ifreq ifr;
1208
1185
if(not get_flags(if_entry->d_name, &ifr)){
1209
1186
if(debug){
1210
fprintf_plus(stderr, "Failed to get flags for interface "
1211
"\"%s\"\n", if_entry->d_name);
1187
fprintf(stderr, "Failed to get flags for interface \"%s\"\n",
1188
if_entry->d_name);
1212
1189
}
1213
1190
return 0;
1214
1191
}
1216
1193
/* Reject down interfaces */
1217
1194
if(not (ifr.ifr_flags & IFF_UP)){
1218
1195
if(debug){
1219
fprintf_plus(stderr, "Rejecting down interface \"%s\"\n",
1220
if_entry->d_name);
1196
fprintf(stderr, "Rejecting down interface \"%s\"\n",
1197
if_entry->d_name);
1221
1198
}
1222
1199
return 0;
1223
1200
}
1225
1202
/* Reject non-running interfaces */
1226
1203
if(not (ifr.ifr_flags & IFF_RUNNING)){
1227
1204
if(debug){
1228
fprintf_plus(stderr, "Rejecting non-running interface \"%s\"\n",
1229
if_entry->d_name);
1205
fprintf(stderr, "Rejecting non-running interface \"%s\"\n",
1206
if_entry->d_name);
1230
1207
}
1231
1208
return 0;
1232
1209
}
1251
1228
/* Is this directory entry a runnable program? */
1252
1229
int runnable_hook(const struct dirent *direntry){
1253
1230
int ret;
1254
size_t sret;
1255
1231
struct stat st;
1256
1232
1257
1233
if((direntry->d_name)[0] == '\0'){
1259
1235
return 0;
1260
1236
}
1261
1237
1262
sret = strspn(direntry->d_name, "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
1263
"abcdefghijklmnopqrstuvwxyz"
1264
"0123456789"
1265
"_-");
1266
if((direntry->d_name)[sret] != '\0'){
1267
/* Contains non-allowed characters */
1268
if(debug){
1269
fprintf_plus(stderr, "Ignoring hook \"%s\" with bad name\n",
1270
direntry->d_name);
1271
}
1272
return 0;
1273
}
1274
1275
char *fullname = NULL;
1276
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1277
if(ret < 0){
1278
perror_plus("asprintf");
1279
return 0;
1280
}
1281
1282
ret = stat(fullname, &st);
1238
/* Save pointer to last character */
1239
char *end = strchr(direntry->d_name, '\0')-1;
1240
1241
if(*end == '~'){
1242
/* Backup name~ */
1243
return 0;
1244
}
1245
1246
if(((direntry->d_name)[0] == '#')
1247
and (*end == '#')){
1248
/* Temporary #name# */
1249
return 0;
1250
}
1251
1252
/* XXX more rules here */
1253
1254
ret = stat(direntry->d_name, &st);
1283
1255
if(ret == -1){
1284
1256
if(debug){
1285
perror_plus("Could not stat hook");
1257
perror_plus("Could not stat plugin");
1286
1258
}
1287
1259
return 0;
1288
1260
}
1289
1261
if(not (S_ISREG(st.st_mode))){
1290
1262
/* Not a regular file */
1291
if(debug){
1292
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1293
direntry->d_name);
1294
}
1295
1263
return 0;
1296
1264
}
1297
1265
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1298
1266
/* Not executable */
1299
if(debug){
1300
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1301
direntry->d_name);
1302
}
1303
1267
return 0;
1304
1268
}
1305
if(debug){
1306
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1307
direntry->d_name);
1308
}
1309
1269
return 1;
1310
1270
}
1311
1271
1318
1278
while(true){
1319
1279
if(mc.current_server == NULL){
1320
1280
if (debug){
1321
fprintf_plus(stderr, "Wait until first server is found."
1322
" No timeout!\n");
1281
fprintf(stderr,
1282
"Wait until first server is found. No timeout!\n");
1323
1283
}
1324
1284
ret = avahi_simple_poll_iterate(s, -1);
1325
1285
} else {
1326
1286
if (debug){
1327
fprintf_plus(stderr, "Check current_server if we should run"
1328
" it, or wait\n");
1287
fprintf(stderr, "Check current_server if we should run it,"
1288
" or wait\n");
1329
1289
}
1330
1290
/* the current time */
1331
1291
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1347
1307
- ((intmax_t)waited_time.tv_nsec / 1000000));
1348
1308
1349
1309
if (debug){
1350
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1351
block_time);
1310
fprintf(stderr, "Blocking for %" PRIdMAX " ms\n", block_time);
1352
1311
}
1353
1312
1354
1313
if(block_time <= 0){
1374
1333
ret = avahi_simple_poll_iterate(s, (int)block_time);
1375
1334
}
1376
1335
if(ret != 0){
1377
if (ret > 0 or errno != EINTR){
1336
if (ret > 0 or errno != EINTR) {
1378
1337
return (ret != 1) ? ret : 0;
1379
1338
}
1380
1339
}
1381
1340
}
1382
1341
}
1383
1342
1384
bool run_network_hooks(const char *mode, const char *interface,
1385
const float delay){
1386
struct dirent **direntries;
1387
struct dirent *direntry;
1388
int ret;
1389
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1390
alphasort);
1391
if(numhooks == -1){
1392
perror_plus("scandir");
1393
} else {
1394
int devnull = open("/dev/null", O_RDONLY);
1395
for(int i = 0; i < numhooks; i++){
1396
direntry = direntries[i];
1397
char *fullname = NULL;
1398
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1399
if(ret < 0){
1400
perror_plus("asprintf");
1401
continue;
1402
}
1403
if(debug){
1404
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1405
direntry->d_name);
1406
}
1407
pid_t hook_pid = fork();
1408
if(hook_pid == 0){
1409
/* Child */
1410
/* Raise privileges */
1411
errno = 0;
1412
ret = seteuid(0);
1413
if(ret == -1){
1414
perror_plus("seteuid");
1415
}
1416
/* Raise privileges even more */
1417
errno = 0;
1418
ret = setuid(0);
1419
if(ret == -1){
1420
perror_plus("setuid");
1421
}
1422
/* Set group */
1423
errno = 0;
1424
ret = setgid(0);
1425
if(ret == -1){
1426
perror_plus("setgid");
1427
}
1428
/* Reset supplementary groups */
1429
errno = 0;
1430
ret = setgroups(0, NULL);
1431
if(ret == -1){
1432
perror_plus("setgroups");
1433
}
1434
dup2(devnull, STDIN_FILENO);
1435
close(devnull);
1436
dup2(STDERR_FILENO, STDOUT_FILENO);
1437
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1438
if(ret == -1){
1439
perror_plus("setenv");
1440
_exit(EX_OSERR);
1441
}
1442
ret = setenv("DEVICE", interface, 1);
1443
if(ret == -1){
1444
perror_plus("setenv");
1445
_exit(EX_OSERR);
1446
}
1447
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1448
if(ret == -1){
1449
perror_plus("setenv");
1450
_exit(EX_OSERR);
1451
}
1452
ret = setenv("MODE", mode, 1);
1453
if(ret == -1){
1454
perror_plus("setenv");
1455
_exit(EX_OSERR);
1456
}
1457
char *delaystring;
1458
ret = asprintf(&delaystring, "%f", delay);
1459
if(ret == -1){
1460
perror_plus("asprintf");
1461
_exit(EX_OSERR);
1462
}
1463
ret = setenv("DELAY", delaystring, 1);
1464
if(ret == -1){
1465
free(delaystring);
1466
perror_plus("setenv");
1467
_exit(EX_OSERR);
1468
}
1469
free(delaystring);
1470
ret = execl(fullname, direntry->d_name, mode, NULL);
1471
perror_plus("execl");
1472
} else {
1473
int status;
1474
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1475
perror_plus("waitpid");
1476
free(fullname);
1477
continue;
1478
}
1479
if(WIFEXITED(status)){
1480
if(WEXITSTATUS(status) != 0){
1481
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1482
" with status %d\n", direntry->d_name,
1483
WEXITSTATUS(status));
1484
free(fullname);
1485
continue;
1486
}
1487
} else if(WIFSIGNALED(status)){
1488
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1489
" signal %d\n", direntry->d_name,
1490
WTERMSIG(status));
1491
free(fullname);
1492
continue;
1493
} else {
1494
fprintf_plus(stderr, "Warning: network hook \"%s\""
1495
" crashed\n", direntry->d_name);
1496
free(fullname);
1497
continue;
1498
}
1499
}
1500
free(fullname);
1501
if(debug){
1502
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1503
direntry->d_name);
1504
}
1505
}
1506
close(devnull);
1507
}
1508
return true;
1509
}
1510
1511
1343
int main(int argc, char *argv[]){
1512
1344
AvahiSServiceBrowser *sb = NULL;
1513
1345
int error;
1595
1427
.arg = "SECONDS",
1596
1428
.doc = "Retry interval used when denied by the mandos server",
1597
1429
.group = 2 },
1598
{ .name = "network-hook-dir", .key = 133,
1599
.arg = "DIR",
1600
.doc = "Directory where network hooks are located",
1601
.group = 2 },
1602
1430
/*
1603
1431
* These reproduce what we would get without ARGP_NO_HELP
1604
1432
*/
1657
1485
argp_error(state, "Bad retry interval");
1658
1486
}
1659
1487
break;
1660
case 133: /* --network-hook-dir */
1661
hookdir = arg;
1662
break;
1663
1488
/*
1664
1489
* These reproduce what we would get without ARGP_NO_HELP
1665
1490
*/
1671
1496
argp_state_help(state, state->out_stream,
1672
1497
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1673
1498
case 'V': /* --version */
1674
fprintf_plus(state->out_stream,
1675
"Mandos plugin mandos-client: ");
1676
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1499
fprintf(state->out_stream, "%s\n", argp_program_version);
1677
1500
exit(argp_err_exit_status);
1678
1501
break;
1679
1502
default:
1706
1529
{
1707
1530
/* Work around Debian bug #633582:
1708
1531
<http://bugs.debian.org/633582> */
1532
struct stat st;
1709
1533
1710
1534
/* Re-raise priviliges */
1711
1535
errno = 0;
1712
1536
ret = seteuid(0);
1713
1537
if(ret == -1){
1714
1538
perror_plus("seteuid");
1715
} else {
1716
struct stat st;
1717
1718
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1719
int seckey_fd = open(seckey, O_RDONLY);
1720
if(seckey_fd == -1){
1721
perror_plus("open");
1722
} else {
1723
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1724
if(ret == -1){
1725
perror_plus("fstat");
1726
} else {
1727
if(S_ISREG(st.st_mode)
1728
and st.st_uid == 0 and st.st_gid == 0){
1729
ret = fchown(seckey_fd, uid, gid);
1730
if(ret == -1){
1731
perror_plus("fchown");
1732
}
1733
}
1734
}
1735
TEMP_FAILURE_RETRY(close(seckey_fd));
1736
}
1737
}
1738
1739
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1740
int pubkey_fd = open(pubkey, O_RDONLY);
1741
if(pubkey_fd == -1){
1742
perror_plus("open");
1743
} else {
1744
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1745
if(ret == -1){
1746
perror_plus("fstat");
1747
} else {
1748
if(S_ISREG(st.st_mode)
1749
and st.st_uid == 0 and st.st_gid == 0){
1750
ret = fchown(pubkey_fd, uid, gid);
1751
if(ret == -1){
1752
perror_plus("fchown");
1753
}
1754
}
1755
}
1756
TEMP_FAILURE_RETRY(close(pubkey_fd));
1757
}
1758
}
1759
1760
/* Lower privileges */
1761
errno = 0;
1762
ret = seteuid(uid);
1763
if(ret == -1){
1764
perror_plus("seteuid");
1765
}
1539
}
1540
1541
if(strcmp(seckey, PATHDIR "/" SECKEY) == 0){
1542
int seckey_fd = open(seckey, O_RDONLY);
1543
if(seckey_fd == -1){
1544
perror_plus("open");
1545
} else {
1546
ret = (int)TEMP_FAILURE_RETRY(fstat(seckey_fd, &st));
1547
if(ret == -1){
1548
perror_plus("fstat");
1549
} else {
1550
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1551
ret = fchown(seckey_fd, uid, gid);
1552
if(ret == -1){
1553
perror_plus("fchown");
1554
}
1555
}
1556
}
1557
TEMP_FAILURE_RETRY(close(seckey_fd));
1558
}
1559
}
1560
1561
if(strcmp(pubkey, PATHDIR "/" PUBKEY) == 0){
1562
int pubkey_fd = open(pubkey, O_RDONLY);
1563
if(pubkey_fd == -1){
1564
perror_plus("open");
1565
} else {
1566
ret = (int)TEMP_FAILURE_RETRY(fstat(pubkey_fd, &st));
1567
if(ret == -1){
1568
perror_plus("fstat");
1569
} else {
1570
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1571
ret = fchown(pubkey_fd, uid, gid);
1572
if(ret == -1){
1573
perror_plus("fchown");
1574
}
1575
}
1576
}
1577
TEMP_FAILURE_RETRY(close(pubkey_fd));
1578
}
1579
}
1580
1581
/* Lower privileges */
1582
errno = 0;
1583
ret = seteuid(uid);
1584
if(ret == -1){
1585
perror_plus("seteuid");
1766
1586
}
1767
1587
}
1768
1588
1769
/* Run network hooks */
1770
if(not run_network_hooks("start", interface, delay)){
1771
goto end;
1589
/* Find network hooks and run them */
1590
{
1591
struct dirent **direntries;
1592
struct dirent *direntry;
1593
int numhooks = scandir(HOOKDIR, &direntries, runnable_hook,
1594
alphasort);
1595
int devnull = open("/dev/null", O_RDONLY);
1596
for(int i = 0; i < numhooks; i++){
1597
direntry = direntries[0];
1598
char *fullname = NULL;
1599
ret = asprintf(&fullname, "%s/%s", tempdir,
1600
direntry->d_name);
1601
if(ret < 0){
1602
perror_plus("asprintf");
1603
continue;
1604
}
1605
pid_t hook_pid = fork();
1606
if(hook_pid == 0){
1607
/* Child */
1608
dup2(devnull, STDIN_FILENO);
1609
close(devnull);
1610
dup2(STDERR_FILENO, STDOUT_FILENO);
1611
setenv("DEVICE", interface, 1);
1612
setenv("VERBOSE", debug ? "1" : "0", 1);
1613
setenv("MODE", "start", 1);
1614
/* setenv( XXX more here */
1615
ret = execl(fullname, direntry->d_name, "start", NULL);
1616
perror_plus("execl");
1617
}
1618
free(fullname);
1619
if(quit_now){
1620
goto end;
1621
}
1622
}
1623
close(devnull);
1772
1624
}
1773
1625
1774
1626
if(not debug){
1790
1642
/* Pick the first interface returned */
1791
1643
interface = strdup(direntries[0]->d_name);
1792
1644
if(debug){
1793
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1645
fprintf(stderr, "Using interface \"%s\"\n", interface);
1794
1646
}
1795
1647
if(interface == NULL){
1796
1648
perror_plus("malloc");
1801
1653
free(direntries);
1802
1654
} else {
1803
1655
free(direntries);
1804
fprintf_plus(stderr, "Could not find a network interface\n");
1656
fprintf(stderr, "Could not find a network interface\n");
1805
1657
exitcode = EXIT_FAILURE;
1806
1658
goto end;
1807
1659
}
1813
1665
srand((unsigned int) time(NULL));
1814
1666
mc.simple_poll = avahi_simple_poll_new();
1815
1667
if(mc.simple_poll == NULL){
1816
fprintf_plus(stderr,
1817
"Avahi: Failed to create simple poll object.\n");
1668
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1818
1669
exitcode = EX_UNAVAILABLE;
1819
1670
goto end;
1820
1671
}
1886
1737
if(strcmp(interface, "none") != 0){
1887
1738
if_index = (AvahiIfIndex) if_nametoindex(interface);
1888
1739
if(if_index == 0){
1889
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1740
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1890
1741
exitcode = EX_UNAVAILABLE;
1891
1742
goto end;
1892
1743
}
2012
1863
#endif /* __linux__ */
2013
1864
/* Lower privileges */
2014
1865
errno = 0;
2015
/* Lower privileges */
2016
ret = seteuid(uid);
2017
if(ret == -1){
2018
perror_plus("seteuid");
1866
if(take_down_interface){
1867
/* Lower privileges */
1868
ret = seteuid(uid);
1869
if(ret == -1){
1870
perror_plus("seteuid");
1871
}
1872
} else {
1873
/* Lower privileges permanently */
1874
ret = setuid(uid);
1875
if(ret == -1){
1876
perror_plus("setuid");
1877
}
2019
1878
}
2020
1879
}
2021
1880
2025
1884
2026
1885
ret = init_gnutls_global(pubkey, seckey);
2027
1886
if(ret == -1){
2028
fprintf_plus(stderr, "init_gnutls_global failed\n");
1887
fprintf(stderr, "init_gnutls_global failed\n");
2029
1888
exitcode = EX_UNAVAILABLE;
2030
1889
goto end;
2031
1890
} else {
2047
1906
}
2048
1907
2049
1908
if(not init_gpgme(pubkey, seckey, tempdir)){
2050
fprintf_plus(stderr, "init_gpgme failed\n");
1909
fprintf(stderr, "init_gpgme failed\n");
2051
1910
exitcode = EX_UNAVAILABLE;
2052
1911
goto end;
2053
1912
} else {
2063
1922
/* (Mainly meant for debugging) */
2064
1923
char *address = strrchr(connect_to, ':');
2065
1924
if(address == NULL){
2066
fprintf_plus(stderr, "No colon in address\n");
1925
fprintf(stderr, "No colon in address\n");
2067
1926
exitcode = EX_USAGE;
2068
1927
goto end;
2069
1928
}
2077
1936
tmpmax = strtoimax(address+1, &tmp, 10);
2078
1937
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2079
1938
or tmpmax != (uint16_t)tmpmax){
2080
fprintf_plus(stderr, "Bad port number\n");
1939
fprintf(stderr, "Bad port number\n");
2081
1940
exitcode = EX_USAGE;
2082
1941
goto end;
2083
1942
}
2113
1972
break;
2114
1973
}
2115
1974
if(debug){
2116
fprintf_plus(stderr, "Retrying in %d seconds\n",
2117
(int)retry_interval);
1975
fprintf(stderr, "Retrying in %d seconds\n",
1976
(int)retry_interval);
2118
1977
}
2119
1978
sleep((int)retry_interval);
2120
1979
}
2150
2009
2151
2010
/* Check if creating the Avahi server object succeeded */
2152
2011
if(mc.server == NULL){
2153
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2154
avahi_strerror(error));
2012
fprintf(stderr, "Failed to create Avahi server: %s\n",
2013
avahi_strerror(error));
2155
2014
exitcode = EX_UNAVAILABLE;
2156
2015
goto end;
2157
2016
}
2165
2024
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2166
2025
NULL, 0, browse_callback, NULL);
2167
2026
if(sb == NULL){
2168
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2169
avahi_strerror(avahi_server_errno(mc.server)));
2027
fprintf(stderr, "Failed to create service browser: %s\n",
2028
avahi_strerror(avahi_server_errno(mc.server)));
2170
2029
exitcode = EX_UNAVAILABLE;
2171
2030
goto end;
2172
2031
}
2178
2037
/* Run the main loop */
2179
2038
2180
2039
if(debug){
2181
fprintf_plus(stderr, "Starting Avahi loop search\n");
2040
fprintf(stderr, "Starting Avahi loop search\n");
2182
2041
}
2183
2042
2184
2043
ret = avahi_loop_with_timeout(mc.simple_poll,
2185
2044
(int)(retry_interval * 1000));
2186
2045
if(debug){
2187
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2188
(ret == 0) ? "successfully" : "with error");
2046
fprintf(stderr, "avahi_loop_with_timeout exited %s\n",
2047
(ret == 0) ? "successfully" : "with error");
2189
2048
}
2190
2049
2191
2050
end:
2192
2051
2193
2052
if(debug){
2194
fprintf_plus(stderr, "%s exiting\n", argv[0]);
2053
fprintf(stderr, "%s exiting\n", argv[0]);
2195
2054
}
2196
2055
2197
2056
/* Cleanup things */
2213
2072
if(gpgme_initialized){
2214
2073
gpgme_release(mc.ctx);
2215
2074
}
2216
2075
2217
2076
/* Cleans up the circular linked list of Mandos servers the client
2218
2077
has seen */
2219
2078
if(mc.current_server != NULL){
2225
2084
}
2226
2085
}
2227
2086
2228
/* Run network hooks */
2229
run_network_hooks("stop", interface, delay);
2087
/* XXX run network hooks "stop" here */
2230
2088
2231
/* Re-raise priviliges */
2232
{
2089
/* Take down the network interface */
2090
if(take_down_interface){
2091
/* Re-raise priviliges */
2233
2092
errno = 0;
2234
2093
ret = seteuid(0);
2235
2094
if(ret == -1){
2236
2095
perror_plus("seteuid");
2237
2096
}
2238
2239
/* Take down the network interface */
2240
if(take_down_interface and geteuid() == 0){
2097
if(geteuid() == 0){
2241
2098
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2242
2099
if(ret == -1){
2243
2100
perror_plus("ioctl SIOCGIFFLAGS");
2244
} else if(network.ifr_flags & IFF_UP){
2101
} else if(network.ifr_flags & IFF_UP) {
2245
2102
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2246
2103
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2247
2104
if(ret == -1){
2252
2109
if(ret == -1){
2253
2110
perror_plus("close");
2254
2111
}
2112
/* Lower privileges permanently */
2113
errno = 0;
2114
ret = setuid(uid);
2115
if(ret == -1){
2116
perror_plus("setuid");
2117
}
2255
2118
}
2256
2119
}
2257
/* Lower privileges permanently */
2258
errno = 0;
2259
ret = setuid(uid);
2260
if(ret == -1){
2261
perror_plus("setuid");
2262
}
2263
2120
2264
2121
/* Removes the GPGME temp directory and all files inside */
2265
2122
if(tempdir_created){
2279
2136
}
2280
2137
ret = remove(fullname);
2281
2138
if(ret == -1){
2282
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2283
strerror(errno));
2139
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
2140
strerror(errno));
2284
2141
}
2285
2142
free(fullname);
2286
2143
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0