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- Committer: Teddy Hogeborn
- Date: 2011-09-19 09:42:55 UTC
- Revision ID: teddy@fukt.bsnet.se-20110919094255-3lji3igz75uog8lh
* mandos-clients.conf.xml (OPTIONS): Moved up "extended_timeout" to
order options alphabetically.
* clients.conf: Language change in comment.
order options alphabetically.
* clients.conf: Language change in comment.
- files removed:
- debian/source/local-options
- network-hooks.d
- files modified:
- DBUS-API
added
removed
plugins.d/mandos-client.c
26
26
* along with this program. If not, see
27
27
* <http://www.gnu.org/licenses/>.
28
28
*
29
* Contact the authors at <mandos@recompile.se>.
29
* Contact the authors at <mandos@fukt.bsnet.se>.
30
30
*/
31
31
32
32
/* Needed by GPGME, specifically gpgme_data_seek() */
53
53
sockaddr_in6, PF_INET6,
54
54
SOCK_STREAM, uid_t, gid_t, open(),
55
55
opendir(), DIR */
56
#include <sys/stat.h> /* open(), S_ISREG */
56
#include <sys/stat.h> /* open() */
57
57
#include <sys/socket.h> /* socket(), struct sockaddr_in6,
58
58
inet_pton(), connect() */
59
59
#include <fcntl.h> /* open() */
85
85
raise() */
86
86
#include <sysexits.h> /* EX_OSERR, EX_USAGE, EX_UNAVAILABLE,
87
87
EX_NOHOST, EX_IOERR, EX_PROTOCOL */
88
#include <sys/wait.h> /* waitpid(), WIFEXITED(),
89
WEXITSTATUS(), WTERMSIG() */
90
88
91
89
#ifdef __linux__
92
90
#include <sys/klog.h> /* klogctl() */
110
108
init_gnutls_session(),
111
109
GNUTLS_* */
112
110
#include <gnutls/openpgp.h>
113
/* gnutls_certificate_set_openpgp_key_file(),
114
GNUTLS_OPENPGP_FMT_BASE64 */
111
/* gnutls_certificate_set_openpgp_key_file(),
112
GNUTLS_OPENPGP_FMT_BASE64 */
115
113
116
114
/* GPGME */
117
115
#include <gpgme.h> /* All GPGME types, constants and
125
123
#define PATHDIR "/conf/conf.d/mandos"
126
124
#define SECKEY "seckey.txt"
127
125
#define PUBKEY "pubkey.txt"
128
#define HOOKDIR "/lib/mandos/network-hooks.d"
129
126
130
127
bool debug = false;
131
128
static const char mandos_protocol_version[] = "1";
132
129
const char *argp_program_version = "mandos-client " VERSION;
133
const char *argp_program_bug_address = "<mandos@recompile.se>";
130
const char *argp_program_bug_address = "<mandos@fukt.bsnet.se>";
134
131
static const char sys_class_net[] = "/sys/class/net";
135
132
char *connect_to = NULL;
136
const char *hookdir = HOOKDIR;
137
133
138
134
/* Doubly linked list that need to be circularly linked when used */
139
135
typedef struct server{
174
170
perror(print_text);
175
171
}
176
172
177
int fprintf_plus(FILE *stream, const char *format, ...){
178
va_list ap;
179
va_start (ap, format);
180
181
TEMP_FAILURE_RETRY(fprintf(stream, "Mandos plugin %s: ",
182
program_invocation_short_name));
183
return TEMP_FAILURE_RETRY(vfprintf(stream, format, ap));
184
}
185
186
173
/*
187
174
* Make additional room in "buffer" for at least BUFFER_SIZE more
188
175
* bytes. "buffer_capacity" is how much is currently allocated,
189
176
* "buffer_length" is how much is already used.
190
177
*/
191
178
size_t incbuffer(char **buffer, size_t buffer_length,
192
size_t buffer_capacity){
179
size_t buffer_capacity){
193
180
if(buffer_length + BUFFER_SIZE > buffer_capacity){
194
181
*buffer = realloc(*buffer, buffer_capacity + BUFFER_SIZE);
195
182
if(buffer == NULL){
201
188
}
202
189
203
190
/* Add server to set of servers to retry periodically */
204
int add_server(const char *ip, uint16_t port, AvahiIfIndex if_index,
205
int af){
191
int add_server(const char *ip, uint16_t port,
192
AvahiIfIndex if_index,
193
int af){
206
194
int ret;
207
195
server *new_server = malloc(sizeof(server));
208
196
if(new_server == NULL){
210
198
return -1;
211
199
}
212
200
*new_server = (server){ .ip = strdup(ip),
213
.port = port,
214
.if_index = if_index,
215
.af = af };
201
.port = port,
202
.if_index = if_index,
203
.af = af };
216
204
if(new_server->ip == NULL){
217
205
perror_plus("strdup");
218
206
return -1;
240
228
/*
241
229
* Initialize GPGME.
242
230
*/
243
static bool init_gpgme(const char *seckey, const char *pubkey,
244
const char *tempdir){
231
static bool init_gpgme(const char *seckey,
232
const char *pubkey, const char *tempdir){
245
233
gpgme_error_t rc;
246
234
gpgme_engine_info_t engine_info;
247
235
262
250
263
251
rc = gpgme_data_new_from_fd(&pgp_data, fd);
264
252
if(rc != GPG_ERR_NO_ERROR){
265
fprintf_plus(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
266
gpgme_strsource(rc), gpgme_strerror(rc));
253
fprintf(stderr, "bad gpgme_data_new_from_fd: %s: %s\n",
254
gpgme_strsource(rc), gpgme_strerror(rc));
267
255
return false;
268
256
}
269
257
270
258
rc = gpgme_op_import(mc.ctx, pgp_data);
271
259
if(rc != GPG_ERR_NO_ERROR){
272
fprintf_plus(stderr, "bad gpgme_op_import: %s: %s\n",
273
gpgme_strsource(rc), gpgme_strerror(rc));
260
fprintf(stderr, "bad gpgme_op_import: %s: %s\n",
261
gpgme_strsource(rc), gpgme_strerror(rc));
274
262
return false;
275
263
}
276
264
283
271
}
284
272
285
273
if(debug){
286
fprintf_plus(stderr, "Initializing GPGME\n");
274
fprintf(stderr, "Initializing GPGME\n");
287
275
}
288
276
289
277
/* Init GPGME */
290
278
gpgme_check_version(NULL);
291
279
rc = gpgme_engine_check_version(GPGME_PROTOCOL_OpenPGP);
292
280
if(rc != GPG_ERR_NO_ERROR){
293
fprintf_plus(stderr, "bad gpgme_engine_check_version: %s: %s\n",
294
gpgme_strsource(rc), gpgme_strerror(rc));
281
fprintf(stderr, "bad gpgme_engine_check_version: %s: %s\n",
282
gpgme_strsource(rc), gpgme_strerror(rc));
295
283
return false;
296
284
}
297
285
298
286
/* Set GPGME home directory for the OpenPGP engine only */
299
287
rc = gpgme_get_engine_info(&engine_info);
300
288
if(rc != GPG_ERR_NO_ERROR){
301
fprintf_plus(stderr, "bad gpgme_get_engine_info: %s: %s\n",
302
gpgme_strsource(rc), gpgme_strerror(rc));
289
fprintf(stderr, "bad gpgme_get_engine_info: %s: %s\n",
290
gpgme_strsource(rc), gpgme_strerror(rc));
303
291
return false;
304
292
}
305
293
while(engine_info != NULL){
311
299
engine_info = engine_info->next;
312
300
}
313
301
if(engine_info == NULL){
314
fprintf_plus(stderr, "Could not set GPGME home dir to %s\n",
315
tempdir);
302
fprintf(stderr, "Could not set GPGME home dir to %s\n", tempdir);
316
303
return false;
317
304
}
318
305
319
306
/* Create new GPGME "context" */
320
307
rc = gpgme_new(&(mc.ctx));
321
308
if(rc != GPG_ERR_NO_ERROR){
322
fprintf_plus(stderr, "Mandos plugin mandos-client: "
323
"bad gpgme_new: %s: %s\n", gpgme_strsource(rc),
324
gpgme_strerror(rc));
309
fprintf(stderr, "bad gpgme_new: %s: %s\n",
310
gpgme_strsource(rc), gpgme_strerror(rc));
325
311
return false;
326
312
}
327
313
346
332
ssize_t plaintext_length = 0;
347
333
348
334
if(debug){
349
fprintf_plus(stderr, "Trying to decrypt OpenPGP data\n");
335
fprintf(stderr, "Trying to decrypt OpenPGP data\n");
350
336
}
351
337
352
338
/* Create new GPGME data buffer from memory cryptotext */
353
339
rc = gpgme_data_new_from_mem(&dh_crypto, cryptotext, crypto_size,
354
340
0);
355
341
if(rc != GPG_ERR_NO_ERROR){
356
fprintf_plus(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
357
gpgme_strsource(rc), gpgme_strerror(rc));
342
fprintf(stderr, "bad gpgme_data_new_from_mem: %s: %s\n",
343
gpgme_strsource(rc), gpgme_strerror(rc));
358
344
return -1;
359
345
}
360
346
361
347
/* Create new empty GPGME data buffer for the plaintext */
362
348
rc = gpgme_data_new(&dh_plain);
363
349
if(rc != GPG_ERR_NO_ERROR){
364
fprintf_plus(stderr, "Mandos plugin mandos-client: "
365
"bad gpgme_data_new: %s: %s\n",
366
gpgme_strsource(rc), gpgme_strerror(rc));
350
fprintf(stderr, "bad gpgme_data_new: %s: %s\n",
351
gpgme_strsource(rc), gpgme_strerror(rc));
367
352
gpgme_data_release(dh_crypto);
368
353
return -1;
369
354
}
372
357
data buffer */
373
358
rc = gpgme_op_decrypt(mc.ctx, dh_crypto, dh_plain);
374
359
if(rc != GPG_ERR_NO_ERROR){
375
fprintf_plus(stderr, "bad gpgme_op_decrypt: %s: %s\n",
376
gpgme_strsource(rc), gpgme_strerror(rc));
360
fprintf(stderr, "bad gpgme_op_decrypt: %s: %s\n",
361
gpgme_strsource(rc), gpgme_strerror(rc));
377
362
plaintext_length = -1;
378
363
if(debug){
379
364
gpgme_decrypt_result_t result;
380
365
result = gpgme_op_decrypt_result(mc.ctx);
381
366
if(result == NULL){
382
fprintf_plus(stderr, "gpgme_op_decrypt_result failed\n");
367
fprintf(stderr, "gpgme_op_decrypt_result failed\n");
383
368
} else {
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);
369
fprintf(stderr, "Unsupported algorithm: %s\n",
370
result->unsupported_algorithm);
371
fprintf(stderr, "Wrong key usage: %u\n",
372
result->wrong_key_usage);
388
373
if(result->file_name != NULL){
389
fprintf_plus(stderr, "File name: %s\n", result->file_name);
374
fprintf(stderr, "File name: %s\n", result->file_name);
390
375
}
391
376
gpgme_recipient_t recipient;
392
377
recipient = result->recipients;
393
378
while(recipient != NULL){
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");
379
fprintf(stderr, "Public key algorithm: %s\n",
380
gpgme_pubkey_algo_name(recipient->pubkey_algo));
381
fprintf(stderr, "Key ID: %s\n", recipient->keyid);
382
fprintf(stderr, "Secret key available: %s\n",
383
recipient->status == GPG_ERR_NO_SECKEY
384
? "No" : "Yes");
401
385
recipient = recipient->next;
402
386
}
403
387
}
406
390
}
407
391
408
392
if(debug){
409
fprintf_plus(stderr, "Decryption of OpenPGP data succeeded\n");
393
fprintf(stderr, "Decryption of OpenPGP data succeeded\n");
410
394
}
411
395
412
396
/* Seek back to the beginning of the GPGME plaintext data buffer */
419
403
*plaintext = NULL;
420
404
while(true){
421
405
plaintext_capacity = incbuffer(plaintext,
422
(size_t)plaintext_length,
423
plaintext_capacity);
406
(size_t)plaintext_length,
407
plaintext_capacity);
424
408
if(plaintext_capacity == 0){
425
perror_plus("incbuffer");
426
plaintext_length = -1;
427
goto decrypt_end;
409
perror_plus("incbuffer");
410
plaintext_length = -1;
411
goto decrypt_end;
428
412
}
429
413
430
414
ret = gpgme_data_read(dh_plain, *plaintext + plaintext_length,
443
427
}
444
428
445
429
if(debug){
446
fprintf_plus(stderr, "Decrypted password is: ");
430
fprintf(stderr, "Decrypted password is: ");
447
431
for(ssize_t i = 0; i < plaintext_length; i++){
448
432
fprintf(stderr, "%02hhX ", (*plaintext)[i]);
449
433
}
471
455
/* GnuTLS log function callback */
472
456
static void debuggnutls(__attribute__((unused)) int level,
473
457
const char* string){
474
fprintf_plus(stderr, "GnuTLS: %s", string);
458
fprintf(stderr, "GnuTLS: %s", string);
475
459
}
476
460
477
461
static int init_gnutls_global(const char *pubkeyfilename,
479
463
int ret;
480
464
481
465
if(debug){
482
fprintf_plus(stderr, "Initializing GnuTLS\n");
466
fprintf(stderr, "Initializing GnuTLS\n");
483
467
}
484
468
485
469
ret = gnutls_global_init();
486
470
if(ret != GNUTLS_E_SUCCESS){
487
fprintf_plus(stderr, "GnuTLS global_init: %s\n",
488
safer_gnutls_strerror(ret));
471
fprintf(stderr, "GnuTLS global_init: %s\n",
472
safer_gnutls_strerror(ret));
489
473
return -1;
490
474
}
491
475
500
484
/* OpenPGP credentials */
501
485
ret = gnutls_certificate_allocate_credentials(&mc.cred);
502
486
if(ret != GNUTLS_E_SUCCESS){
503
fprintf_plus(stderr, "GnuTLS memory error: %s\n",
504
safer_gnutls_strerror(ret));
487
fprintf(stderr, "GnuTLS memory error: %s\n",
488
safer_gnutls_strerror(ret));
505
489
gnutls_global_deinit();
506
490
return -1;
507
491
}
508
492
509
493
if(debug){
510
fprintf_plus(stderr, "Attempting to use OpenPGP public key %s and"
511
" secret key %s as GnuTLS credentials\n",
512
pubkeyfilename,
513
seckeyfilename);
494
fprintf(stderr, "Attempting to use OpenPGP public key %s and"
495
" secret key %s as GnuTLS credentials\n", pubkeyfilename,
496
seckeyfilename);
514
497
}
515
498
516
499
ret = gnutls_certificate_set_openpgp_key_file
517
500
(mc.cred, pubkeyfilename, seckeyfilename,
518
501
GNUTLS_OPENPGP_FMT_BASE64);
519
502
if(ret != GNUTLS_E_SUCCESS){
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));
503
fprintf(stderr,
504
"Error[%d] while reading the OpenPGP key pair ('%s',"
505
" '%s')\n", ret, pubkeyfilename, seckeyfilename);
506
fprintf(stderr, "The GnuTLS error is: %s\n",
507
safer_gnutls_strerror(ret));
525
508
goto globalfail;
526
509
}
527
510
528
511
/* GnuTLS server initialization */
529
512
ret = gnutls_dh_params_init(&mc.dh_params);
530
513
if(ret != GNUTLS_E_SUCCESS){
531
fprintf_plus(stderr, "Error in GnuTLS DH parameter"
532
" initialization: %s\n",
533
safer_gnutls_strerror(ret));
514
fprintf(stderr, "Error in GnuTLS DH parameter initialization:"
515
" %s\n", safer_gnutls_strerror(ret));
534
516
goto globalfail;
535
517
}
536
518
ret = gnutls_dh_params_generate2(mc.dh_params, mc.dh_bits);
537
519
if(ret != GNUTLS_E_SUCCESS){
538
fprintf_plus(stderr, "Error in GnuTLS prime generation: %s\n",
539
safer_gnutls_strerror(ret));
520
fprintf(stderr, "Error in GnuTLS prime generation: %s\n",
521
safer_gnutls_strerror(ret));
540
522
goto globalfail;
541
523
}
542
524
562
544
}
563
545
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
564
546
if(ret != GNUTLS_E_SUCCESS){
565
fprintf_plus(stderr,
566
"Error in GnuTLS session initialization: %s\n",
567
safer_gnutls_strerror(ret));
547
fprintf(stderr, "Error in GnuTLS session initialization: %s\n",
548
safer_gnutls_strerror(ret));
568
549
}
569
550
570
551
{
577
558
}
578
559
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
579
560
if(ret != GNUTLS_E_SUCCESS){
580
fprintf_plus(stderr, "Syntax error at: %s\n", err);
581
fprintf_plus(stderr, "GnuTLS error: %s\n",
582
safer_gnutls_strerror(ret));
561
fprintf(stderr, "Syntax error at: %s\n", err);
562
fprintf(stderr, "GnuTLS error: %s\n",
563
safer_gnutls_strerror(ret));
583
564
gnutls_deinit(*session);
584
565
return -1;
585
566
}
594
575
}
595
576
} while(ret == GNUTLS_E_INTERRUPTED or ret == GNUTLS_E_AGAIN);
596
577
if(ret != GNUTLS_E_SUCCESS){
597
fprintf_plus(stderr, "Error setting GnuTLS credentials: %s\n",
598
safer_gnutls_strerror(ret));
578
fprintf(stderr, "Error setting GnuTLS credentials: %s\n",
579
safer_gnutls_strerror(ret));
599
580
gnutls_deinit(*session);
600
581
return -1;
601
582
}
646
627
pf = PF_INET;
647
628
break;
648
629
default:
649
fprintf_plus(stderr, "Bad address family: %d\n", af);
630
fprintf(stderr, "Bad address family: %d\n", af);
650
631
errno = EINVAL;
651
632
return -1;
652
633
}
657
638
}
658
639
659
640
if(debug){
660
fprintf_plus(stderr, "Setting up a TCP connection to %s, port %"
661
PRIu16 "\n", ip, port);
641
fprintf(stderr, "Setting up a TCP connection to %s, port %" PRIu16
642
"\n", ip, port);
662
643
}
663
644
664
645
tcp_sd = socket(pf, SOCK_STREAM, 0);
690
671
}
691
672
if(ret == 0){
692
673
int e = errno;
693
fprintf_plus(stderr, "Bad address: %s\n", ip);
674
fprintf(stderr, "Bad address: %s\n", ip);
694
675
errno = e;
695
676
goto mandos_end;
696
677
}
701
682
702
683
if(IN6_IS_ADDR_LINKLOCAL /* Spurious warnings from */
703
684
(&to.in6.sin6_addr)){ /* -Wstrict-aliasing=2 or lower and
704
-Wunreachable-code*/
685
-Wunreachable-code*/
705
686
if(if_index == AVAHI_IF_UNSPEC){
706
fprintf_plus(stderr, "An IPv6 link-local address is"
707
" incomplete without a network interface\n");
687
fprintf(stderr, "An IPv6 link-local address is incomplete"
688
" without a network interface\n");
708
689
errno = EINVAL;
709
690
goto mandos_end;
710
691
}
728
709
if(if_indextoname((unsigned int)if_index, interface) == NULL){
729
710
perror_plus("if_indextoname");
730
711
} else {
731
fprintf_plus(stderr, "Connection to: %s%%%s, port %" PRIu16
732
"\n", ip, interface, port);
712
fprintf(stderr, "Connection to: %s%%%s, port %" PRIu16 "\n",
713
ip, interface, port);
733
714
}
734
715
} else {
735
fprintf_plus(stderr, "Connection to: %s, port %" PRIu16 "\n",
736
ip, port);
716
fprintf(stderr, "Connection to: %s, port %" PRIu16 "\n", ip,
717
port);
737
718
}
738
719
char addrstr[(INET_ADDRSTRLEN > INET6_ADDRSTRLEN) ?
739
720
INET_ADDRSTRLEN : INET6_ADDRSTRLEN] = "";
749
730
perror_plus("inet_ntop");
750
731
} else {
751
732
if(strcmp(addrstr, ip) != 0){
752
fprintf_plus(stderr, "Canonical address form: %s\n", addrstr);
733
fprintf(stderr, "Canonical address form: %s\n", addrstr);
753
734
}
754
735
}
755
736
}
783
764
while(true){
784
765
size_t out_size = strlen(out);
785
766
ret = (int)TEMP_FAILURE_RETRY(write(tcp_sd, out + written,
786
out_size - written));
767
out_size - written));
787
768
if(ret == -1){
788
769
int e = errno;
789
770
perror_plus("write");
809
790
}
810
791
811
792
if(debug){
812
fprintf_plus(stderr, "Establishing TLS session with %s\n", ip);
793
fprintf(stderr, "Establishing TLS session with %s\n", ip);
813
794
}
814
795
815
796
if(quit_now){
835
816
836
817
if(ret != GNUTLS_E_SUCCESS){
837
818
if(debug){
838
fprintf_plus(stderr, "*** GnuTLS Handshake failed ***\n");
819
fprintf(stderr, "*** GnuTLS Handshake failed ***\n");
839
820
gnutls_perror(ret);
840
821
}
841
822
errno = EPROTO;
845
826
/* Read OpenPGP packet that contains the wanted password */
846
827
847
828
if(debug){
848
fprintf_plus(stderr, "Retrieving OpenPGP encrypted password from"
849
" %s\n", ip);
829
fprintf(stderr, "Retrieving OpenPGP encrypted password from %s\n",
830
ip);
850
831
}
851
832
852
833
while(true){
857
838
}
858
839
859
840
buffer_capacity = incbuffer(&buffer, buffer_length,
860
buffer_capacity);
841
buffer_capacity);
861
842
if(buffer_capacity == 0){
862
843
int e = errno;
863
844
perror_plus("incbuffer");
890
871
}
891
872
} while(ret == GNUTLS_E_AGAIN or ret == GNUTLS_E_INTERRUPTED);
892
873
if(ret < 0){
893
fprintf_plus(stderr, "*** GnuTLS Re-handshake failed "
894
"***\n");
874
fprintf(stderr, "*** GnuTLS Re-handshake failed ***\n");
895
875
gnutls_perror(ret);
896
876
errno = EPROTO;
897
877
goto mandos_end;
898
878
}
899
879
break;
900
880
default:
901
fprintf_plus(stderr, "Unknown error while reading data from"
902
" encrypted session with Mandos server\n");
881
fprintf(stderr, "Unknown error while reading data from"
882
" encrypted session with Mandos server\n");
903
883
gnutls_bye(session, GNUTLS_SHUT_RDWR);
904
884
errno = EIO;
905
885
goto mandos_end;
910
890
}
911
891
912
892
if(debug){
913
fprintf_plus(stderr, "Closing TLS session\n");
893
fprintf(stderr, "Closing TLS session\n");
914
894
}
915
895
916
896
if(quit_now){
928
908
929
909
if(buffer_length > 0){
930
910
ssize_t decrypted_buffer_size;
931
decrypted_buffer_size = pgp_packet_decrypt(buffer, buffer_length,
911
decrypted_buffer_size = pgp_packet_decrypt(buffer,
912
buffer_length,
932
913
&decrypted_buffer);
933
914
if(decrypted_buffer_size >= 0){
934
915
945
926
if(ret == 0 and ferror(stdout)){
946
927
int e = errno;
947
928
if(debug){
948
fprintf_plus(stderr, "Error writing encrypted data: %s\n",
949
strerror(errno));
929
fprintf(stderr, "Error writing encrypted data: %s\n",
930
strerror(errno));
950
931
}
951
932
errno = e;
952
933
goto mandos_end;
1009
990
switch(event){
1010
991
default:
1011
992
case AVAHI_RESOLVER_FAILURE:
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)));
993
fprintf(stderr, "(Avahi Resolver) Failed to resolve service '%s'"
994
" of type '%s' in domain '%s': %s\n", name, type, domain,
995
avahi_strerror(avahi_server_errno(mc.server)));
1016
996
break;
1017
997
1018
998
case AVAHI_RESOLVER_FOUND:
1020
1000
char ip[AVAHI_ADDRESS_STR_MAX];
1021
1001
avahi_address_snprint(ip, sizeof(ip), address);
1022
1002
if(debug){
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);
1003
fprintf(stderr, "Mandos server \"%s\" found on %s (%s, %"
1004
PRIdMAX ") on port %" PRIu16 "\n", name, host_name,
1005
ip, (intmax_t)interface, port);
1026
1006
}
1027
1007
int ret = start_mandos_communication(ip, port, interface,
1028
1008
avahi_proto_to_af(proto));
1060
1040
default:
1061
1041
case AVAHI_BROWSER_FAILURE:
1062
1042
1063
fprintf_plus(stderr, "(Avahi browser) %s\n",
1064
avahi_strerror(avahi_server_errno(mc.server)));
1043
fprintf(stderr, "(Avahi browser) %s\n",
1044
avahi_strerror(avahi_server_errno(mc.server)));
1065
1045
avahi_simple_poll_quit(mc.simple_poll);
1066
1046
return;
1067
1047
1074
1054
if(avahi_s_service_resolver_new(mc.server, interface, protocol,
1075
1055
name, type, domain, protocol, 0,
1076
1056
resolve_callback, NULL) == NULL)
1077
fprintf_plus(stderr, "Avahi: Failed to resolve service '%s':"
1078
" %s\n", name,
1079
avahi_strerror(avahi_server_errno(mc.server)));
1057
fprintf(stderr, "Avahi: Failed to resolve service '%s': %s\n",
1058
name, avahi_strerror(avahi_server_errno(mc.server)));
1080
1059
break;
1081
1060
1082
1061
case AVAHI_BROWSER_REMOVE:
1085
1064
case AVAHI_BROWSER_ALL_FOR_NOW:
1086
1065
case AVAHI_BROWSER_CACHE_EXHAUSTED:
1087
1066
if(debug){
1088
fprintf_plus(stderr, "No Mandos server found, still"
1089
" searching...\n");
1067
fprintf(stderr, "No Mandos server found, still searching...\n");
1090
1068
}
1091
1069
break;
1092
1070
}
1107
1085
errno = old_errno;
1108
1086
}
1109
1087
1110
bool get_flags(const char *ifname, struct ifreq *ifr){
1111
int ret;
1112
1113
int s = socket(PF_INET6, SOCK_DGRAM, IPPROTO_IP);
1114
if(s < 0){
1115
perror_plus("socket");
1116
return false;
1117
}
1118
strcpy(ifr->ifr_name, ifname);
1119
ret = ioctl(s, SIOCGIFFLAGS, ifr);
1120
if(ret == -1){
1088
/*
1089
* This function determines if a directory entry in /sys/class/net
1090
* corresponds to an acceptable network device.
1091
* (This function is passed to scandir(3) as a filter function.)
1092
*/
1093
int good_interface(const struct dirent *if_entry){
1094
ssize_t ssret;
1095
char *flagname = NULL;
1096
if(if_entry->d_name[0] == '.'){
1097
return 0;
1098
}
1099
int ret = asprintf(&flagname, "%s/%s/flags", sys_class_net,
1100
if_entry->d_name);
1101
if(ret < 0){
1102
perror_plus("asprintf");
1103
return 0;
1104
}
1105
int flags_fd = (int)TEMP_FAILURE_RETRY(open(flagname, O_RDONLY));
1106
if(flags_fd == -1){
1107
perror_plus("open");
1108
free(flagname);
1109
return 0;
1110
}
1111
free(flagname);
1112
typedef short ifreq_flags; /* ifreq.ifr_flags in netdevice(7) */
1113
/* read line from flags_fd */
1114
ssize_t to_read = 2+(sizeof(ifreq_flags)*2)+1; /* "0x1003\n" */
1115
char *flagstring = malloc((size_t)to_read+1); /* +1 for final \0 */
1116
flagstring[(size_t)to_read] = '\0';
1117
if(flagstring == NULL){
1118
perror_plus("malloc");
1119
close(flags_fd);
1120
return 0;
1121
}
1122
while(to_read > 0){
1123
ssret = (ssize_t)TEMP_FAILURE_RETRY(read(flags_fd, flagstring,
1124
(size_t)to_read));
1125
if(ssret == -1){
1126
perror_plus("read");
1127
free(flagstring);
1128
close(flags_fd);
1129
return 0;
1130
}
1131
to_read -= ssret;
1132
if(ssret == 0){
1133
break;
1134
}
1135
}
1136
close(flags_fd);
1137
intmax_t tmpmax;
1138
char *tmp;
1139
errno = 0;
1140
tmpmax = strtoimax(flagstring, &tmp, 0);
1141
if(errno != 0 or tmp == flagstring or (*tmp != '\0'
1142
and not (isspace(*tmp)))
1143
or tmpmax != (ifreq_flags)tmpmax){
1121
1144
if(debug){
1122
perror_plus("ioctl SIOCGIFFLAGS");
1145
fprintf(stderr, "Invalid flags \"%s\" for interface \"%s\"\n",
1146
flagstring, if_entry->d_name);
1123
1147
}
1124
return false;
1148
free(flagstring);
1149
return 0;
1125
1150
}
1126
return true;
1127
}
1128
1129
bool good_flags(const char *ifname, const struct ifreq *ifr){
1130
1151
free(flagstring);
1152
ifreq_flags flags = (ifreq_flags)tmpmax;
1131
1153
/* Reject the loopback device */
1132
if(ifr->ifr_flags & IFF_LOOPBACK){
1154
if(flags & IFF_LOOPBACK){
1133
1155
if(debug){
1134
fprintf_plus(stderr, "Rejecting loopback interface \"%s\"\n",
1135
ifname);
1156
fprintf(stderr, "Rejecting loopback interface \"%s\"\n",
1157
if_entry->d_name);
1136
1158
}
1137
return false;
1159
return 0;
1138
1160
}
1139
1161
/* Accept point-to-point devices only if connect_to is specified */
1140
if(connect_to != NULL and (ifr->ifr_flags & IFF_POINTOPOINT)){
1162
if(connect_to != NULL and (flags & IFF_POINTOPOINT)){
1141
1163
if(debug){
1142
fprintf_plus(stderr, "Accepting point-to-point interface"
1143
" \"%s\"\n", ifname);
1164
fprintf(stderr, "Accepting point-to-point interface \"%s\"\n",
1165
if_entry->d_name);
1144
1166
}
1145
return true;
1167
return 1;
1146
1168
}
1147
1169
/* Otherwise, reject non-broadcast-capable devices */
1148
if(not (ifr->ifr_flags & IFF_BROADCAST)){
1170
if(not (flags & IFF_BROADCAST)){
1149
1171
if(debug){
1150
fprintf_plus(stderr, "Rejecting non-broadcast interface"
1151
" \"%s\"\n", ifname);
1172
fprintf(stderr, "Rejecting non-broadcast interface \"%s\"\n",
1173
if_entry->d_name);
1152
1174
}
1153
return false;
1175
return 0;
1154
1176
}
1155
1177
/* Reject non-ARP interfaces (including dummy interfaces) */
1156
if(ifr->ifr_flags & IFF_NOARP){
1178
if(flags & IFF_NOARP){
1157
1179
if(debug){
1158
fprintf_plus(stderr, "Rejecting non-ARP interface \"%s\"\n",
1159
ifname);
1180
fprintf(stderr, "Rejecting non-ARP interface \"%s\"\n",
1181
if_entry->d_name);
1160
1182
}
1161
return false;
1183
return 0;
1162
1184
}
1163
1164
1185
/* Accept this device */
1165
1186
if(debug){
1166
fprintf_plus(stderr, "Interface \"%s\" is good\n", ifname);
1167
}
1168
return true;
1169
}
1170
1171
/*
1172
* This function determines if a directory entry in /sys/class/net
1173
* corresponds to an acceptable network device.
1174
* (This function is passed to scandir(3) as a filter function.)
1175
*/
1176
int good_interface(const struct dirent *if_entry){
1177
if(if_entry->d_name[0] == '.'){
1178
return 0;
1179
}
1180
1181
struct ifreq ifr;
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
}
1187
return 0;
1188
}
1189
1190
if(not good_flags(if_entry->d_name, &ifr)){
1191
return 0;
1192
}
1193
return 1;
1194
}
1195
1196
/*
1197
* This function determines if a directory entry in /sys/class/net
1198
* corresponds to an acceptable network device which is up.
1199
* (This function is passed to scandir(3) as a filter function.)
1200
*/
1201
int up_interface(const struct dirent *if_entry){
1202
if(if_entry->d_name[0] == '.'){
1203
return 0;
1204
}
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
1215
/* Reject down interfaces */
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;
1187
fprintf(stderr, "Interface \"%s\" is acceptable\n",
1188
if_entry->d_name);
1235
1189
}
1236
1190
return 1;
1237
1191
}
1247
1201
return 1;
1248
1202
}
1249
1203
1250
/* Is this directory entry a runnable program? */
1251
int runnable_hook(const struct dirent *direntry){
1252
int ret;
1253
size_t sret;
1254
struct stat st;
1255
1256
if((direntry->d_name)[0] == '\0'){
1257
/* Empty name? */
1258
return 0;
1259
}
1260
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);
1282
if(ret == -1){
1283
if(debug){
1284
perror_plus("Could not stat hook");
1285
}
1286
return 0;
1287
}
1288
if(not (S_ISREG(st.st_mode))){
1289
/* Not a regular file */
1290
if(debug){
1291
fprintf_plus(stderr, "Ignoring hook \"%s\" - not a file\n",
1292
direntry->d_name);
1293
}
1294
return 0;
1295
}
1296
if(not (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))){
1297
/* Not executable */
1298
if(debug){
1299
fprintf_plus(stderr, "Ignoring hook \"%s\" - not executable\n",
1300
direntry->d_name);
1301
}
1302
return 0;
1303
}
1304
if(debug){
1305
fprintf_plus(stderr, "Hook \"%s\" is acceptable\n",
1306
direntry->d_name);
1307
}
1308
return 1;
1309
}
1310
1311
1204
int avahi_loop_with_timeout(AvahiSimplePoll *s, int retry_interval){
1312
1205
int ret;
1313
1206
struct timespec now;
1317
1210
while(true){
1318
1211
if(mc.current_server == NULL){
1319
1212
if (debug){
1320
fprintf_plus(stderr, "Wait until first server is found."
1321
" No timeout!\n");
1213
fprintf(stderr,
1214
"Wait until first server is found. No timeout!\n");
1322
1215
}
1323
1216
ret = avahi_simple_poll_iterate(s, -1);
1324
1217
} else {
1325
1218
if (debug){
1326
fprintf_plus(stderr, "Check current_server if we should run"
1327
" it, or wait\n");
1219
fprintf(stderr, "Check current_server if we should run it,"
1220
" or wait\n");
1328
1221
}
1329
1222
/* the current time */
1330
1223
ret = clock_gettime(CLOCK_MONOTONIC, &now);
1346
1239
- ((intmax_t)waited_time.tv_nsec / 1000000));
1347
1240
1348
1241
if (debug){
1349
fprintf_plus(stderr, "Blocking for %" PRIdMAX " ms\n",
1350
block_time);
1242
fprintf(stderr, "Blocking for %" PRIdMAX " ms\n", block_time);
1351
1243
}
1352
1244
1353
1245
if(block_time <= 0){
1373
1265
ret = avahi_simple_poll_iterate(s, (int)block_time);
1374
1266
}
1375
1267
if(ret != 0){
1376
if (ret > 0 or errno != EINTR){
1268
if (ret > 0 or errno != EINTR) {
1377
1269
return (ret != 1) ? ret : 0;
1378
1270
}
1379
1271
}
1380
1272
}
1381
1273
}
1382
1274
1383
bool run_network_hooks(const char *mode, const char *interface,
1384
const float delay){
1385
struct dirent **direntries;
1386
struct dirent *direntry;
1387
int ret;
1388
int numhooks = scandir(hookdir, &direntries, runnable_hook,
1389
alphasort);
1390
if(numhooks == -1){
1391
perror_plus("scandir");
1392
} else {
1393
int devnull = open("/dev/null", O_RDONLY);
1394
for(int i = 0; i < numhooks; i++){
1395
direntry = direntries[i];
1396
char *fullname = NULL;
1397
ret = asprintf(&fullname, "%s/%s", hookdir, direntry->d_name);
1398
if(ret < 0){
1399
perror_plus("asprintf");
1400
continue;
1401
}
1402
if(debug){
1403
fprintf_plus(stderr, "Running network hook \"%s\"\n",
1404
direntry->d_name);
1405
}
1406
pid_t hook_pid = fork();
1407
if(hook_pid == 0){
1408
/* Child */
1409
dup2(devnull, STDIN_FILENO);
1410
close(devnull);
1411
dup2(STDERR_FILENO, STDOUT_FILENO);
1412
ret = setenv("MANDOSNETHOOKDIR", hookdir, 1);
1413
if(ret == -1){
1414
perror_plus("setenv");
1415
return false;
1416
}
1417
ret = setenv("DEVICE", interface, 1);
1418
if(ret == -1){
1419
perror_plus("setenv");
1420
return false;
1421
}
1422
ret = setenv("VERBOSE", debug ? "1" : "0", 1);
1423
if(ret == -1){
1424
perror_plus("setenv");
1425
return false;
1426
}
1427
ret = setenv("MODE", mode, 1);
1428
if(ret == -1){
1429
perror_plus("setenv");
1430
return false;
1431
}
1432
char *delaystring;
1433
ret = asprintf(&delaystring, "%f", delay);
1434
if(ret == -1){
1435
perror_plus("asprintf");
1436
return false;
1437
}
1438
ret = setenv("DELAY", delaystring, 1);
1439
if(ret == -1){
1440
free(delaystring);
1441
perror_plus("setenv");
1442
return false;
1443
}
1444
free(delaystring);
1445
ret = execl(fullname, direntry->d_name, mode, NULL);
1446
perror_plus("execl");
1447
} else {
1448
int status;
1449
if(TEMP_FAILURE_RETRY(waitpid(hook_pid, &status, 0)) == -1){
1450
perror_plus("waitpid");
1451
free(fullname);
1452
continue;
1453
}
1454
if(WIFEXITED(status)){
1455
if(WEXITSTATUS(status) != 0){
1456
fprintf_plus(stderr, "Warning: network hook \"%s\" exited"
1457
" with status %d\n", direntry->d_name,
1458
WEXITSTATUS(status));
1459
free(fullname);
1460
continue;
1461
}
1462
} else if(WIFSIGNALED(status)){
1463
fprintf_plus(stderr, "Warning: network hook \"%s\" died by"
1464
" signal %d\n", direntry->d_name,
1465
WTERMSIG(status));
1466
free(fullname);
1467
continue;
1468
} else {
1469
fprintf_plus(stderr, "Warning: network hook \"%s\""
1470
" crashed\n", direntry->d_name);
1471
free(fullname);
1472
continue;
1473
}
1474
}
1475
free(fullname);
1476
if(debug){
1477
fprintf_plus(stderr, "Network hook \"%s\" ran successfully\n",
1478
direntry->d_name);
1479
}
1480
}
1481
close(devnull);
1482
}
1483
return true;
1484
}
1485
1486
1275
int main(int argc, char *argv[]){
1487
1276
AvahiSServiceBrowser *sb = NULL;
1488
1277
int error;
1570
1359
.arg = "SECONDS",
1571
1360
.doc = "Retry interval used when denied by the mandos server",
1572
1361
.group = 2 },
1573
{ .name = "network-hook-dir", .key = 133,
1574
.arg = "DIR",
1575
.doc = "Directory where network hooks are located",
1576
.group = 2 },
1577
1362
/*
1578
1363
* These reproduce what we would get without ARGP_NO_HELP
1579
1364
*/
1632
1417
argp_error(state, "Bad retry interval");
1633
1418
}
1634
1419
break;
1635
case 133: /* --network-hook-dir */
1636
hookdir = arg;
1637
break;
1638
1420
/*
1639
1421
* These reproduce what we would get without ARGP_NO_HELP
1640
1422
*/
1646
1428
argp_state_help(state, state->out_stream,
1647
1429
ARGP_HELP_USAGE | ARGP_HELP_EXIT_ERR);
1648
1430
case 'V': /* --version */
1649
fprintf_plus(state->out_stream,
1650
"Mandos plugin mandos-client: ");
1651
fprintf_plus(state->out_stream, "%s\n", argp_program_version);
1431
fprintf(state->out_stream, "%s\n", argp_program_version);
1652
1432
exit(argp_err_exit_status);
1653
1433
break;
1654
1434
default:
1678
1458
}
1679
1459
}
1680
1460
1681
if(getuid() == 0){
1461
{
1682
1462
/* Work around Debian bug #633582:
1683
1463
<http://bugs.debian.org/633582> */
1684
1464
struct stat st;
1699
1479
if(ret == -1){
1700
1480
perror_plus("fstat");
1701
1481
} else {
1702
if(S_ISREG(st.st_mode)
1703
and st.st_uid == 0 and st.st_gid == 0){
1482
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1704
1483
ret = fchown(seckey_fd, uid, gid);
1705
1484
if(ret == -1){
1706
1485
perror_plus("fchown");
1720
1499
if(ret == -1){
1721
1500
perror_plus("fstat");
1722
1501
} else {
1723
if(S_ISREG(st.st_mode)
1724
and st.st_uid == 0 and st.st_gid == 0){
1502
if(S_ISREG(st.st_mode) and st.st_uid == 0 and st.st_gid == 0){
1725
1503
ret = fchown(pubkey_fd, uid, gid);
1726
1504
if(ret == -1){
1727
1505
perror_plus("fchown");
1740
1518
}
1741
1519
}
1742
1520
1743
/* Run network hooks */
1744
{
1745
if(getuid() == 0){
1746
/* Re-raise priviliges */
1747
errno = 0;
1748
ret = seteuid(0);
1749
if(ret == -1){
1750
perror_plus("seteuid");
1751
}
1752
}
1753
if(not run_network_hooks("start", interface, delay)){
1754
goto end;
1755
}
1756
if(getuid() == 0){
1757
/* Lower privileges */
1758
errno = 0;
1759
ret = seteuid(uid);
1760
if(ret == -1){
1761
perror_plus("seteuid");
1762
}
1763
}
1764
}
1765
1766
1521
if(not debug){
1767
1522
avahi_set_log_function(empty_log);
1768
1523
}
1769
1524
1770
1525
if(interface[0] == '\0'){
1771
1526
struct dirent **direntries;
1772
/* First look for interfaces that are up */
1773
ret = scandir(sys_class_net, &direntries, up_interface,
1527
ret = scandir(sys_class_net, &direntries, good_interface,
1774
1528
alphasort);
1775
if(ret == 0){
1776
/* No up interfaces, look for any good interfaces */
1777
free(direntries);
1778
ret = scandir(sys_class_net, &direntries, good_interface,
1779
alphasort);
1780
}
1781
1529
if(ret >= 1){
1782
/* Pick the first interface returned */
1530
/* Pick the first good interface */
1783
1531
interface = strdup(direntries[0]->d_name);
1784
1532
if(debug){
1785
fprintf_plus(stderr, "Using interface \"%s\"\n", interface);
1533
fprintf(stderr, "Using interface \"%s\"\n", interface);
1786
1534
}
1787
1535
if(interface == NULL){
1788
1536
perror_plus("malloc");
1793
1541
free(direntries);
1794
1542
} else {
1795
1543
free(direntries);
1796
fprintf_plus(stderr, "Could not find a network interface\n");
1544
fprintf(stderr, "Could not find a network interface\n");
1797
1545
exitcode = EXIT_FAILURE;
1798
1546
goto end;
1799
1547
}
1805
1553
srand((unsigned int) time(NULL));
1806
1554
mc.simple_poll = avahi_simple_poll_new();
1807
1555
if(mc.simple_poll == NULL){
1808
fprintf_plus(stderr,
1809
"Avahi: Failed to create simple poll object.\n");
1556
fprintf(stderr, "Avahi: Failed to create simple poll object.\n");
1810
1557
exitcode = EX_UNAVAILABLE;
1811
1558
goto end;
1812
1559
}
1878
1625
if(strcmp(interface, "none") != 0){
1879
1626
if_index = (AvahiIfIndex) if_nametoindex(interface);
1880
1627
if(if_index == 0){
1881
fprintf_plus(stderr, "No such interface: \"%s\"\n", interface);
1628
fprintf(stderr, "No such interface: \"%s\"\n", interface);
1882
1629
exitcode = EX_UNAVAILABLE;
1883
1630
goto end;
1884
1631
}
2004
1751
#endif /* __linux__ */
2005
1752
/* Lower privileges */
2006
1753
errno = 0;
2007
/* Lower privileges */
2008
ret = seteuid(uid);
2009
if(ret == -1){
2010
perror_plus("seteuid");
1754
if(take_down_interface){
1755
/* Lower privileges */
1756
ret = seteuid(uid);
1757
if(ret == -1){
1758
perror_plus("seteuid");
1759
}
1760
} else {
1761
/* Lower privileges permanently */
1762
ret = setuid(uid);
1763
if(ret == -1){
1764
perror_plus("setuid");
1765
}
2011
1766
}
2012
1767
}
2013
1768
2017
1772
2018
1773
ret = init_gnutls_global(pubkey, seckey);
2019
1774
if(ret == -1){
2020
fprintf_plus(stderr, "init_gnutls_global failed\n");
1775
fprintf(stderr, "init_gnutls_global failed\n");
2021
1776
exitcode = EX_UNAVAILABLE;
2022
1777
goto end;
2023
1778
} else {
2039
1794
}
2040
1795
2041
1796
if(not init_gpgme(pubkey, seckey, tempdir)){
2042
fprintf_plus(stderr, "init_gpgme failed\n");
1797
fprintf(stderr, "init_gpgme failed\n");
2043
1798
exitcode = EX_UNAVAILABLE;
2044
1799
goto end;
2045
1800
} else {
2055
1810
/* (Mainly meant for debugging) */
2056
1811
char *address = strrchr(connect_to, ':');
2057
1812
if(address == NULL){
2058
fprintf_plus(stderr, "No colon in address\n");
1813
fprintf(stderr, "No colon in address\n");
2059
1814
exitcode = EX_USAGE;
2060
1815
goto end;
2061
1816
}
2069
1824
tmpmax = strtoimax(address+1, &tmp, 10);
2070
1825
if(errno != 0 or tmp == address+1 or *tmp != '\0'
2071
1826
or tmpmax != (uint16_t)tmpmax){
2072
fprintf_plus(stderr, "Bad port number\n");
1827
fprintf(stderr, "Bad port number\n");
2073
1828
exitcode = EX_USAGE;
2074
1829
goto end;
2075
1830
}
2105
1860
break;
2106
1861
}
2107
1862
if(debug){
2108
fprintf_plus(stderr, "Retrying in %d seconds\n",
2109
(int)retry_interval);
1863
fprintf(stderr, "Retrying in %d seconds\n",
1864
(int)retry_interval);
2110
1865
}
2111
1866
sleep((int)retry_interval);
2112
1867
}
2114
1869
if (not quit_now){
2115
1870
exitcode = EXIT_SUCCESS;
2116
1871
}
2117
1872
2118
1873
goto end;
2119
1874
}
2120
1875
2142
1897
2143
1898
/* Check if creating the Avahi server object succeeded */
2144
1899
if(mc.server == NULL){
2145
fprintf_plus(stderr, "Failed to create Avahi server: %s\n",
2146
avahi_strerror(error));
1900
fprintf(stderr, "Failed to create Avahi server: %s\n",
1901
avahi_strerror(error));
2147
1902
exitcode = EX_UNAVAILABLE;
2148
1903
goto end;
2149
1904
}
2157
1912
AVAHI_PROTO_UNSPEC, "_mandos._tcp",
2158
1913
NULL, 0, browse_callback, NULL);
2159
1914
if(sb == NULL){
2160
fprintf_plus(stderr, "Failed to create service browser: %s\n",
2161
avahi_strerror(avahi_server_errno(mc.server)));
1915
fprintf(stderr, "Failed to create service browser: %s\n",
1916
avahi_strerror(avahi_server_errno(mc.server)));
2162
1917
exitcode = EX_UNAVAILABLE;
2163
1918
goto end;
2164
1919
}
2170
1925
/* Run the main loop */
2171
1926
2172
1927
if(debug){
2173
fprintf_plus(stderr, "Starting Avahi loop search\n");
1928
fprintf(stderr, "Starting Avahi loop search\n");
2174
1929
}
2175
1930
2176
1931
ret = avahi_loop_with_timeout(mc.simple_poll,
2177
1932
(int)(retry_interval * 1000));
2178
1933
if(debug){
2179
fprintf_plus(stderr, "avahi_loop_with_timeout exited %s\n",
2180
(ret == 0) ? "successfully" : "with error");
1934
fprintf(stderr, "avahi_loop_with_timeout exited %s\n",
1935
(ret == 0) ? "successfully" : "with error");
2181
1936
}
2182
1937
2183
1938
end:
2184
1939
2185
1940
if(debug){
2186
fprintf_plus(stderr, "%s exiting\n", argv[0]);
1941
fprintf(stderr, "%s exiting\n", argv[0]);
2187
1942
}
2188
1943
2189
1944
/* Cleanup things */
2205
1960
if(gpgme_initialized){
2206
1961
gpgme_release(mc.ctx);
2207
1962
}
2208
1963
2209
1964
/* Cleans up the circular linked list of Mandos servers the client
2210
1965
has seen */
2211
1966
if(mc.current_server != NULL){
2217
1972
}
2218
1973
}
2219
1974
2220
/* Re-raise priviliges */
2221
{
2222
if(getuid() == 0){
2223
errno = 0;
2224
ret = seteuid(0);
2225
if(ret == -1){
2226
perror_plus("seteuid");
2227
}
1975
/* Take down the network interface */
1976
if(take_down_interface){
1977
/* Re-raise priviliges */
1978
errno = 0;
1979
ret = seteuid(0);
1980
if(ret == -1){
1981
perror_plus("seteuid");
2228
1982
}
2229
2230
/* Run network hooks */
2231
run_network_hooks("stop", interface, delay);
2232
2233
/* Take down the network interface */
2234
if(take_down_interface and geteuid() == 0){
1983
if(geteuid() == 0){
2235
1984
ret = ioctl(sd, SIOCGIFFLAGS, &network);
2236
1985
if(ret == -1){
2237
1986
perror_plus("ioctl SIOCGIFFLAGS");
2238
} else if(network.ifr_flags & IFF_UP){
1987
} else if(network.ifr_flags & IFF_UP) {
2239
1988
network.ifr_flags &= ~(short)IFF_UP; /* clear flag */
2240
1989
ret = ioctl(sd, SIOCSIFFLAGS, &network);
2241
1990
if(ret == -1){
2246
1995
if(ret == -1){
2247
1996
perror_plus("close");
2248
1997
}
2249
}
2250
}
2251
if(getuid() == 0){
2252
/* Lower privileges permanently */
2253
errno = 0;
2254
ret = setuid(uid);
2255
if(ret == -1){
2256
perror_plus("setuid");
1998
/* Lower privileges permanently */
1999
errno = 0;
2000
ret = setuid(uid);
2001
if(ret == -1){
2002
perror_plus("setuid");
2003
}
2257
2004
}
2258
2005
}
2259
2006
2275
2022
}
2276
2023
ret = remove(fullname);
2277
2024
if(ret == -1){
2278
fprintf_plus(stderr, "remove(\"%s\"): %s\n", fullname,
2279
strerror(errno));
2025
fprintf(stderr, "remove(\"%s\"): %s\n", fullname,
2026
strerror(errno));
2280
2027
}
2281
2028
free(fullname);
2282
2029
}
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0